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master
super-intel.c
10 527 строк
274 KB
NeilBrown
IMSM: don't crash when creating an array with missing devices.
21 янв 2014, 02:40
21 янв 2014, 02:40
1ca5c8e
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/* * mdadm - Intel(R) Matrix Storage Manager Support * * Copyright (C) 2002-2008 Intel Corporation * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. */ #define HAVE_STDINT_H 1 #include "mdadm.h" #include "mdmon.h" #include "sha1.h" #include "platform-intel.h" #include <values.h> #include <scsi/sg.h> #include <ctype.h> #include <dirent.h> /* MPB == Metadata Parameter Block */ #define MPB_SIGNATURE "Intel Raid ISM Cfg Sig. " #define MPB_SIG_LEN (strlen(MPB_SIGNATURE)) #define MPB_VERSION_RAID0 "1.0.00" #define MPB_VERSION_RAID1 "1.1.00" #define MPB_VERSION_MANY_VOLUMES_PER_ARRAY "1.2.00" #define MPB_VERSION_3OR4_DISK_ARRAY "1.2.01" #define MPB_VERSION_RAID5 "1.2.02" #define MPB_VERSION_5OR6_DISK_ARRAY "1.2.04" #define MPB_VERSION_CNG "1.2.06" #define MPB_VERSION_ATTRIBS "1.3.00" #define MAX_SIGNATURE_LENGTH 32 #define MAX_RAID_SERIAL_LEN 16 /* supports RAID0 */ #define MPB_ATTRIB_RAID0 __cpu_to_le32(0x00000001) /* supports RAID1 */ #define MPB_ATTRIB_RAID1 __cpu_to_le32(0x00000002) /* supports RAID10 */ #define MPB_ATTRIB_RAID10 __cpu_to_le32(0x00000004) /* supports RAID1E */ #define MPB_ATTRIB_RAID1E __cpu_to_le32(0x00000008) /* supports RAID5 */ #define MPB_ATTRIB_RAID5 __cpu_to_le32(0x00000010) /* supports RAID CNG */ #define MPB_ATTRIB_RAIDCNG __cpu_to_le32(0x00000020) /* supports expanded stripe sizes of 256K, 512K and 1MB */ #define MPB_ATTRIB_EXP_STRIPE_SIZE __cpu_to_le32(0x00000040) /* The OROM Support RST Caching of Volumes */ #define MPB_ATTRIB_NVM __cpu_to_le32(0x02000000) /* The OROM supports creating disks greater than 2TB */ #define MPB_ATTRIB_2TB_DISK __cpu_to_le32(0x04000000) /* The OROM supports Bad Block Management */ #define MPB_ATTRIB_BBM __cpu_to_le32(0x08000000) /* THe OROM Supports NVM Caching of Volumes */ #define MPB_ATTRIB_NEVER_USE2 __cpu_to_le32(0x10000000) /* The OROM supports creating volumes greater than 2TB */ #define MPB_ATTRIB_2TB __cpu_to_le32(0x20000000) /* originally for PMP, now it's wasted b/c. Never use this bit! */ #define MPB_ATTRIB_NEVER_USE __cpu_to_le32(0x40000000) /* Verify MPB contents against checksum after reading MPB */ #define MPB_ATTRIB_CHECKSUM_VERIFY __cpu_to_le32(0x80000000) /* Define all supported attributes that have to be accepted by mdadm */ #define MPB_ATTRIB_SUPPORTED (MPB_ATTRIB_CHECKSUM_VERIFY | \ MPB_ATTRIB_2TB | \ MPB_ATTRIB_2TB_DISK | \ MPB_ATTRIB_RAID0 | \ MPB_ATTRIB_RAID1 | \ MPB_ATTRIB_RAID10 | \ MPB_ATTRIB_RAID5 | \ MPB_ATTRIB_EXP_STRIPE_SIZE) /* Define attributes that are unused but not harmful */ #define MPB_ATTRIB_IGNORED (MPB_ATTRIB_NEVER_USE) #define MPB_SECTOR_CNT 2210 #define IMSM_RESERVED_SECTORS 4096 #define NUM_BLOCKS_DIRTY_STRIPE_REGION 2056 #define SECT_PER_MB_SHIFT 11 /* Disk configuration info. */ #define IMSM_MAX_DEVICES 255 struct imsm_disk { __u8 serial[MAX_RAID_SERIAL_LEN];/* 0xD8 - 0xE7 ascii serial number */ __u32 total_blocks_lo; /* 0xE8 - 0xEB total blocks lo */ __u32 scsi_id; /* 0xEC - 0xEF scsi ID */ #define SPARE_DISK __cpu_to_le32(0x01) /* Spare */ #define CONFIGURED_DISK __cpu_to_le32(0x02) /* Member of some RaidDev */ #define FAILED_DISK __cpu_to_le32(0x04) /* Permanent failure */ __u32 status; /* 0xF0 - 0xF3 */ __u32 owner_cfg_num; /* which config 0,1,2... owns this disk */ __u32 total_blocks_hi; /* 0xF4 - 0xF5 total blocks hi */ #define IMSM_DISK_FILLERS 3 __u32 filler[IMSM_DISK_FILLERS]; /* 0xF5 - 0x107 MPB_DISK_FILLERS for future expansion */ }; /* map selector for map managment */ #define MAP_0 0 #define MAP_1 1 #define MAP_X -1 /* RAID map configuration infos. */ struct imsm_map { __u32 pba_of_lba0_lo; /* start address of partition */ __u32 blocks_per_member_lo;/* blocks per member */ __u32 num_data_stripes_lo; /* number of data stripes */ __u16 blocks_per_strip; __u8 map_state; /* Normal, Uninitialized, Degraded, Failed */ #define IMSM_T_STATE_NORMAL 0 #define IMSM_T_STATE_UNINITIALIZED 1 #define IMSM_T_STATE_DEGRADED 2 #define IMSM_T_STATE_FAILED 3 __u8 raid_level; #define IMSM_T_RAID0 0 #define IMSM_T_RAID1 1 #define IMSM_T_RAID5 5 /* since metadata version 1.2.02 ? */ __u8 num_members; /* number of member disks */ __u8 num_domains; /* number of parity domains */ __u8 failed_disk_num; /* valid only when state is degraded */ __u8 ddf; __u32 pba_of_lba0_hi; __u32 blocks_per_member_hi; __u32 num_data_stripes_hi; __u32 filler[4]; /* expansion area */ #define IMSM_ORD_REBUILD (1 << 24) __u32 disk_ord_tbl[1]; /* disk_ord_tbl[num_members], * top byte contains some flags */ } __attribute__ ((packed)); struct imsm_vol { __u32 curr_migr_unit; __u32 checkpoint_id; /* id to access curr_migr_unit */ __u8 migr_state; /* Normal or Migrating */ #define MIGR_INIT 0 #define MIGR_REBUILD 1 #define MIGR_VERIFY 2 /* analagous to echo check > sync_action */ #define MIGR_GEN_MIGR 3 #define MIGR_STATE_CHANGE 4 #define MIGR_REPAIR 5 __u8 migr_type; /* Initializing, Rebuilding, ... */ __u8 dirty; __u8 fs_state; /* fast-sync state for CnG (0xff == disabled) */ __u16 verify_errors; /* number of mismatches */ __u16 bad_blocks; /* number of bad blocks during verify */ __u32 filler[4]; struct imsm_map map[1]; /* here comes another one if migr_state */ } __attribute__ ((packed)); struct imsm_dev { __u8 volume[MAX_RAID_SERIAL_LEN]; __u32 size_low; __u32 size_high; #define DEV_BOOTABLE __cpu_to_le32(0x01) #define DEV_BOOT_DEVICE __cpu_to_le32(0x02) #define DEV_READ_COALESCING __cpu_to_le32(0x04) #define DEV_WRITE_COALESCING __cpu_to_le32(0x08) #define DEV_LAST_SHUTDOWN_DIRTY __cpu_to_le32(0x10) #define DEV_HIDDEN_AT_BOOT __cpu_to_le32(0x20) #define DEV_CURRENTLY_HIDDEN __cpu_to_le32(0x40) #define DEV_VERIFY_AND_FIX __cpu_to_le32(0x80) #define DEV_MAP_STATE_UNINIT __cpu_to_le32(0x100) #define DEV_NO_AUTO_RECOVERY __cpu_to_le32(0x200) #define DEV_CLONE_N_GO __cpu_to_le32(0x400) #define DEV_CLONE_MAN_SYNC __cpu_to_le32(0x800) #define DEV_CNG_MASTER_DISK_NUM __cpu_to_le32(0x1000) __u32 status; /* Persistent RaidDev status */ __u32 reserved_blocks; /* Reserved blocks at beginning of volume */ __u8 migr_priority; __u8 num_sub_vols; __u8 tid; __u8 cng_master_disk; __u16 cache_policy; __u8 cng_state; __u8 cng_sub_state; #define IMSM_DEV_FILLERS 10 __u32 filler[IMSM_DEV_FILLERS]; struct imsm_vol vol; } __attribute__ ((packed)); struct imsm_super { __u8 sig[MAX_SIGNATURE_LENGTH]; /* 0x00 - 0x1F */ __u32 check_sum; /* 0x20 - 0x23 MPB Checksum */ __u32 mpb_size; /* 0x24 - 0x27 Size of MPB */ __u32 family_num; /* 0x28 - 0x2B Checksum from first time this config was written */ __u32 generation_num; /* 0x2C - 0x2F Incremented each time this array's MPB is written */ __u32 error_log_size; /* 0x30 - 0x33 in bytes */ __u32 attributes; /* 0x34 - 0x37 */ __u8 num_disks; /* 0x38 Number of configured disks */ __u8 num_raid_devs; /* 0x39 Number of configured volumes */ __u8 error_log_pos; /* 0x3A */ __u8 fill[1]; /* 0x3B */ __u32 cache_size; /* 0x3c - 0x40 in mb */ __u32 orig_family_num; /* 0x40 - 0x43 original family num */ __u32 pwr_cycle_count; /* 0x44 - 0x47 simulated power cycle count for array */ __u32 bbm_log_size; /* 0x48 - 0x4B - size of bad Block Mgmt Log in bytes */ #define IMSM_FILLERS 35 __u32 filler[IMSM_FILLERS]; /* 0x4C - 0xD7 RAID_MPB_FILLERS */ struct imsm_disk disk[1]; /* 0xD8 diskTbl[numDisks] */ /* here comes imsm_dev[num_raid_devs] */ /* here comes BBM logs */ } __attribute__ ((packed)); #define BBM_LOG_MAX_ENTRIES 254 struct bbm_log_entry { __u64 defective_block_start; #define UNREADABLE 0xFFFFFFFF __u32 spare_block_offset; __u16 remapped_marked_count; __u16 disk_ordinal; } __attribute__ ((__packed__)); struct bbm_log { __u32 signature; /* 0xABADB10C */ __u32 entry_count; __u32 reserved_spare_block_count; /* 0 */ __u32 reserved; /* 0xFFFF */ __u64 first_spare_lba; struct bbm_log_entry mapped_block_entries[BBM_LOG_MAX_ENTRIES]; } __attribute__ ((__packed__)); #ifndef MDASSEMBLE static char *map_state_str[] = { "normal", "uninitialized", "degraded", "failed" }; #endif #define RAID_DISK_RESERVED_BLOCKS_IMSM_HI 2209 #define GEN_MIGR_AREA_SIZE 2048 /* General Migration Copy Area size in blocks */ #define MIGR_REC_BUF_SIZE 512 /* size of migr_record i/o buffer */ #define MIGR_REC_POSITION 512 /* migr_record position offset on disk, * MIGR_REC_BUF_SIZE <= MIGR_REC_POSITION */ #define UNIT_SRC_NORMAL 0 /* Source data for curr_migr_unit must * be recovered using srcMap */ #define UNIT_SRC_IN_CP_AREA 1 /* Source data for curr_migr_unit has * already been migrated and must * be recovered from checkpoint area */ struct migr_record { __u32 rec_status; /* Status used to determine how to restart * migration in case it aborts * in some fashion */ __u32 curr_migr_unit; /* 0..numMigrUnits-1 */ __u32 family_num; /* Family number of MPB * containing the RaidDev * that is migrating */ __u32 ascending_migr; /* True if migrating in increasing * order of lbas */ __u32 blocks_per_unit; /* Num disk blocks per unit of operation */ __u32 dest_depth_per_unit; /* Num member blocks each destMap * member disk * advances per unit-of-operation */ __u32 ckpt_area_pba; /* Pba of first block of ckpt copy area */ __u32 dest_1st_member_lba; /* First member lba on first * stripe of destination */ __u32 num_migr_units; /* Total num migration units-of-op */ __u32 post_migr_vol_cap; /* Size of volume after * migration completes */ __u32 post_migr_vol_cap_hi; /* Expansion space for LBA64 */ __u32 ckpt_read_disk_num; /* Which member disk in destSubMap[0] the * migration ckpt record was read from * (for recovered migrations) */ } __attribute__ ((__packed__)); struct md_list { /* usage marker: * 1: load metadata * 2: metadata does not match * 4: already checked */ int used; char *devname; int found; int container; dev_t st_rdev; struct md_list *next; }; #define pr_vrb(fmt, arg...) (void) (verbose && pr_err(fmt, ##arg)) static __u8 migr_type(struct imsm_dev *dev) { if (dev->vol.migr_type == MIGR_VERIFY && dev->status & DEV_VERIFY_AND_FIX) return MIGR_REPAIR; else return dev->vol.migr_type; } static void set_migr_type(struct imsm_dev *dev, __u8 migr_type) { /* for compatibility with older oroms convert MIGR_REPAIR, into * MIGR_VERIFY w/ DEV_VERIFY_AND_FIX status */ if (migr_type == MIGR_REPAIR) { dev->vol.migr_type = MIGR_VERIFY; dev->status |= DEV_VERIFY_AND_FIX; } else { dev->vol.migr_type = migr_type; dev->status &= ~DEV_VERIFY_AND_FIX; } } static unsigned int sector_count(__u32 bytes) { return ROUND_UP(bytes, 512) / 512; } static unsigned int mpb_sectors(struct imsm_super *mpb) { return sector_count(__le32_to_cpu(mpb->mpb_size)); } struct intel_dev { struct imsm_dev *dev; struct intel_dev *next; unsigned index; }; struct intel_hba { enum sys_dev_type type; char *path; char *pci_id; struct intel_hba *next; }; enum action { DISK_REMOVE = 1, DISK_ADD }; /* internal representation of IMSM metadata */ struct intel_super { union { void *buf; /* O_DIRECT buffer for reading/writing metadata */ struct imsm_super *anchor; /* immovable parameters */ }; union { void *migr_rec_buf; /* buffer for I/O operations */ struct migr_record *migr_rec; /* migration record */ }; int clean_migration_record_by_mdmon; /* when reshape is switched to next array, it indicates that mdmon is allowed to clean migration record */ size_t len; /* size of the 'buf' allocation */ void *next_buf; /* for realloc'ing buf from the manager */ size_t next_len; int updates_pending; /* count of pending updates for mdmon */ int current_vol; /* index of raid device undergoing creation */ unsigned long long create_offset; /* common start for 'current_vol' */ __u32 random; /* random data for seeding new family numbers */ struct intel_dev *devlist; struct dl { struct dl *next; int index; __u8 serial[MAX_RAID_SERIAL_LEN]; int major, minor; char *devname; struct imsm_disk disk; int fd; int extent_cnt; struct extent *e; /* for determining freespace @ create */ int raiddisk; /* slot to fill in autolayout */ enum action action; } *disks, *current_disk; struct dl *disk_mgmt_list; /* list of disks to add/remove while mdmon active */ struct dl *missing; /* disks removed while we weren't looking */ struct bbm_log *bbm_log; struct intel_hba *hba; /* device path of the raid controller for this metadata */ const struct imsm_orom *orom; /* platform firmware support */ struct intel_super *next; /* (temp) list for disambiguating family_num */ }; struct intel_disk { struct imsm_disk disk; #define IMSM_UNKNOWN_OWNER (-1) int owner; struct intel_disk *next; }; struct extent { unsigned long long start, size; }; /* definitions of reshape process types */ enum imsm_reshape_type { CH_TAKEOVER, CH_MIGRATION, CH_ARRAY_SIZE, }; /* definition of messages passed to imsm_process_update */ enum imsm_update_type { update_activate_spare, update_create_array, update_kill_array, update_rename_array, update_add_remove_disk, update_reshape_container_disks, update_reshape_migration, update_takeover, update_general_migration_checkpoint, update_size_change, }; struct imsm_update_activate_spare { enum imsm_update_type type; struct dl *dl; int slot; int array; struct imsm_update_activate_spare *next; }; struct geo_params { char devnm[32]; char *dev_name; unsigned long long size; int level; int layout; int chunksize; int raid_disks; }; enum takeover_direction { R10_TO_R0, R0_TO_R10 }; struct imsm_update_takeover { enum imsm_update_type type; int subarray; enum takeover_direction direction; }; struct imsm_update_reshape { enum imsm_update_type type; int old_raid_disks; int new_raid_disks; int new_disks[1]; /* new_raid_disks - old_raid_disks makedev number */ }; struct imsm_update_reshape_migration { enum imsm_update_type type; int old_raid_disks; int new_raid_disks; /* fields for array migration changes */ int subdev; int new_level; int new_layout; int new_chunksize; int new_disks[1]; /* new_raid_disks - old_raid_disks makedev number */ }; struct imsm_update_size_change { enum imsm_update_type type; int subdev; long long new_size; }; struct imsm_update_general_migration_checkpoint { enum imsm_update_type type; __u32 curr_migr_unit; }; struct disk_info { __u8 serial[MAX_RAID_SERIAL_LEN]; }; struct imsm_update_create_array { enum imsm_update_type type; int dev_idx; struct imsm_dev dev; }; struct imsm_update_kill_array { enum imsm_update_type type; int dev_idx; }; struct imsm_update_rename_array { enum imsm_update_type type; __u8 name[MAX_RAID_SERIAL_LEN]; int dev_idx; }; struct imsm_update_add_remove_disk { enum imsm_update_type type; }; static const char *_sys_dev_type[] = { [SYS_DEV_UNKNOWN] = "Unknown", [SYS_DEV_SAS] = "SAS", [SYS_DEV_SATA] = "SATA" }; const char *get_sys_dev_type(enum sys_dev_type type) { if (type >= SYS_DEV_MAX) type = SYS_DEV_UNKNOWN; return _sys_dev_type[type]; } static struct intel_hba * alloc_intel_hba(struct sys_dev *device) { struct intel_hba *result = xmalloc(sizeof(*result)); result->type = device->type; result->path = xstrdup(device->path); result->next = NULL; if (result->path && (result->pci_id = strrchr(result->path, '/')) != NULL) result->pci_id++; return result; } static struct intel_hba * find_intel_hba(struct intel_hba *hba, struct sys_dev *device) { struct intel_hba *result=NULL; for (result = hba; result; result = result->next) { if (result->type == device->type && strcmp(result->path, device->path) == 0) break; } return result; } static int attach_hba_to_super(struct intel_super *super, struct sys_dev *device) { struct intel_hba *hba; /* check if disk attached to Intel HBA */ hba = find_intel_hba(super->hba, device); if (hba != NULL) return 1; /* Check if HBA is already attached to super */ if (super->hba == NULL) { super->hba = alloc_intel_hba(device); return 1; } else /* IMSM metadata disallows to attach disks to multiple * controllers. */ return 2; } static struct sys_dev* find_disk_attached_hba(int fd, const char *devname) { struct sys_dev *list, *elem; char *disk_path; if ((list = find_intel_devices()) == NULL) return 0; if (fd < 0) disk_path = (char *) devname; else disk_path = diskfd_to_devpath(fd); if (!disk_path) return 0; for (elem = list; elem; elem = elem->next) if (path_attached_to_hba(disk_path, elem->path)) return elem; if (disk_path != devname) free(disk_path); return NULL; } static int find_intel_hba_capability(int fd, struct intel_super *super, char *devname); static struct supertype *match_metadata_desc_imsm(char *arg) { struct supertype *st; if (strcmp(arg, "imsm") != 0 && strcmp(arg, "default") != 0 ) return NULL; st = xcalloc(1, sizeof(*st)); st->ss = &super_imsm; st->max_devs = IMSM_MAX_DEVICES; st->minor_version = 0; st->sb = NULL; return st; } #ifndef MDASSEMBLE static __u8 *get_imsm_version(struct imsm_super *mpb) { return &mpb->sig[MPB_SIG_LEN]; } #endif /* retrieve a disk directly from the anchor when the anchor is known to be * up-to-date, currently only at load time */ static struct imsm_disk *__get_imsm_disk(struct imsm_super *mpb, __u8 index) { if (index >= mpb->num_disks) return NULL; return &mpb->disk[index]; } /* retrieve the disk description based on a index of the disk * in the sub-array */ static struct dl *get_imsm_dl_disk(struct intel_super *super, __u8 index) { struct dl *d; for (d = super->disks; d; d = d->next) if (d->index == index) return d; return NULL; } /* retrieve a disk from the parsed metadata */ static struct imsm_disk *get_imsm_disk(struct intel_super *super, __u8 index) { struct dl *dl; dl = get_imsm_dl_disk(super, index); if (dl) return &dl->disk; return NULL; } /* generate a checksum directly from the anchor when the anchor is known to be * up-to-date, currently only at load or write_super after coalescing */ static __u32 __gen_imsm_checksum(struct imsm_super *mpb) { __u32 end = mpb->mpb_size / sizeof(end); __u32 *p = (__u32 *) mpb; __u32 sum = 0; while (end--) { sum += __le32_to_cpu(*p); p++; } return sum - __le32_to_cpu(mpb->check_sum); } static size_t sizeof_imsm_map(struct imsm_map *map) { return sizeof(struct imsm_map) + sizeof(__u32) * (map->num_members - 1); } struct imsm_map *get_imsm_map(struct imsm_dev *dev, int second_map) { /* A device can have 2 maps if it is in the middle of a migration. * If second_map is: * MAP_0 - we return the first map * MAP_1 - we return the second map if it exists, else NULL * MAP_X - we return the second map if it exists, else the first */ struct imsm_map *map = &dev->vol.map[0]; struct imsm_map *map2 = NULL; if (dev->vol.migr_state) map2 = (void *)map + sizeof_imsm_map(map); switch (second_map) { case MAP_0: break; case MAP_1: map = map2; break; case MAP_X: if (map2) map = map2; break; default: map = NULL; } return map; } /* return the size of the device. * migr_state increases the returned size if map[0] were to be duplicated */ static size_t sizeof_imsm_dev(struct imsm_dev *dev, int migr_state) { size_t size = sizeof(*dev) - sizeof(struct imsm_map) + sizeof_imsm_map(get_imsm_map(dev, MAP_0)); /* migrating means an additional map */ if (dev->vol.migr_state) size += sizeof_imsm_map(get_imsm_map(dev, MAP_1)); else if (migr_state) size += sizeof_imsm_map(get_imsm_map(dev, MAP_0)); return size; } #ifndef MDASSEMBLE /* retrieve disk serial number list from a metadata update */ static struct disk_info *get_disk_info(struct imsm_update_create_array *update) { void *u = update; struct disk_info *inf; inf = u + sizeof(*update) - sizeof(struct imsm_dev) + sizeof_imsm_dev(&update->dev, 0); return inf; } #endif static struct imsm_dev *__get_imsm_dev(struct imsm_super *mpb, __u8 index) { int offset; int i; void *_mpb = mpb; if (index >= mpb->num_raid_devs) return NULL; /* devices start after all disks */ offset = ((void *) &mpb->disk[mpb->num_disks]) - _mpb; for (i = 0; i <= index; i++) if (i == index) return _mpb + offset; else offset += sizeof_imsm_dev(_mpb + offset, 0); return NULL; } static struct imsm_dev *get_imsm_dev(struct intel_super *super, __u8 index) { struct intel_dev *dv; if (index >= super->anchor->num_raid_devs) return NULL; for (dv = super->devlist; dv; dv = dv->next) if (dv->index == index) return dv->dev; return NULL; } /* * for second_map: * == MAP_0 get first map * == MAP_1 get second map * == MAP_X than get map according to the current migr_state */ static __u32 get_imsm_ord_tbl_ent(struct imsm_dev *dev, int slot, int second_map) { struct imsm_map *map; map = get_imsm_map(dev, second_map); /* top byte identifies disk under rebuild */ return __le32_to_cpu(map->disk_ord_tbl[slot]); } #define ord_to_idx(ord) (((ord) << 8) >> 8) static __u32 get_imsm_disk_idx(struct imsm_dev *dev, int slot, int second_map) { __u32 ord = get_imsm_ord_tbl_ent(dev, slot, second_map); return ord_to_idx(ord); } static void set_imsm_ord_tbl_ent(struct imsm_map *map, int slot, __u32 ord) { map->disk_ord_tbl[slot] = __cpu_to_le32(ord); } static int get_imsm_disk_slot(struct imsm_map *map, unsigned idx) { int slot; __u32 ord; for (slot = 0; slot < map->num_members; slot++) { ord = __le32_to_cpu(map->disk_ord_tbl[slot]); if (ord_to_idx(ord) == idx) return slot; } return -1; } static int get_imsm_raid_level(struct imsm_map *map) { if (map->raid_level == 1) { if (map->num_members == 2) return 1; else return 10; } return map->raid_level; } static int cmp_extent(const void *av, const void *bv) { const struct extent *a = av; const struct extent *b = bv; if (a->start < b->start) return -1; if (a->start > b->start) return 1; return 0; } static int count_memberships(struct dl *dl, struct intel_super *super) { int memberships = 0; int i; for (i = 0; i < super->anchor->num_raid_devs; i++) { struct imsm_dev *dev = get_imsm_dev(super, i); struct imsm_map *map = get_imsm_map(dev, MAP_0); if (get_imsm_disk_slot(map, dl->index) >= 0) memberships++; } return memberships; } static __u32 imsm_min_reserved_sectors(struct intel_super *super); static int split_ull(unsigned long long n, __u32 *lo, __u32 *hi) { if (lo == 0 || hi == 0) return 1; *lo = __le32_to_cpu((unsigned)n); *hi = __le32_to_cpu((unsigned)(n >> 32)); return 0; } static unsigned long long join_u32(__u32 lo, __u32 hi) { return (unsigned long long)__le32_to_cpu(lo) | (((unsigned long long)__le32_to_cpu(hi)) << 32); } static unsigned long long total_blocks(struct imsm_disk *disk) { if (disk == NULL) return 0; return join_u32(disk->total_blocks_lo, disk->total_blocks_hi); } static unsigned long long pba_of_lba0(struct imsm_map *map) { if (map == NULL) return 0; return join_u32(map->pba_of_lba0_lo, map->pba_of_lba0_hi); } static unsigned long long blocks_per_member(struct imsm_map *map) { if (map == NULL) return 0; return join_u32(map->blocks_per_member_lo, map->blocks_per_member_hi); } #ifndef MDASSEMBLE static unsigned long long num_data_stripes(struct imsm_map *map) { if (map == NULL) return 0; return join_u32(map->num_data_stripes_lo, map->num_data_stripes_hi); } static void set_total_blocks(struct imsm_disk *disk, unsigned long long n) { split_ull(n, &disk->total_blocks_lo, &disk->total_blocks_hi); } #endif static void set_pba_of_lba0(struct imsm_map *map, unsigned long long n) { split_ull(n, &map->pba_of_lba0_lo, &map->pba_of_lba0_hi); } static void set_blocks_per_member(struct imsm_map *map, unsigned long long n) { split_ull(n, &map->blocks_per_member_lo, &map->blocks_per_member_hi); } static void set_num_data_stripes(struct imsm_map *map, unsigned long long n) { split_ull(n, &map->num_data_stripes_lo, &map->num_data_stripes_hi); } static struct extent *get_extents(struct intel_super *super, struct dl *dl) { /* find a list of used extents on the given physical device */ struct extent *rv, *e; int i; int memberships = count_memberships(dl, super); __u32 reservation; /* trim the reserved area for spares, so they can join any array * regardless of whether the OROM has assigned sectors from the * IMSM_RESERVED_SECTORS region */ if (dl->index == -1) reservation = imsm_min_reserved_sectors(super); else reservation = MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS; rv = xcalloc(sizeof(struct extent), (memberships + 1)); e = rv; for (i = 0; i < super->anchor->num_raid_devs; i++) { struct imsm_dev *dev = get_imsm_dev(super, i); struct imsm_map *map = get_imsm_map(dev, MAP_0); if (get_imsm_disk_slot(map, dl->index) >= 0) { e->start = pba_of_lba0(map); e->size = blocks_per_member(map); e++; } } qsort(rv, memberships, sizeof(*rv), cmp_extent); /* determine the start of the metadata * when no raid devices are defined use the default * ...otherwise allow the metadata to truncate the value * as is the case with older versions of imsm */ if (memberships) { struct extent *last = &rv[memberships - 1]; unsigned long long remainder; remainder = total_blocks(&dl->disk) - (last->start + last->size); /* round down to 1k block to satisfy precision of the kernel * 'size' interface */ remainder &= ~1UL; /* make sure remainder is still sane */ if (remainder < (unsigned)ROUND_UP(super->len, 512) >> 9) remainder = ROUND_UP(super->len, 512) >> 9; if (reservation > remainder) reservation = remainder; } e->start = total_blocks(&dl->disk) - reservation; e->size = 0; return rv; } /* try to determine how much space is reserved for metadata from * the last get_extents() entry, otherwise fallback to the * default */ static __u32 imsm_reserved_sectors(struct intel_super *super, struct dl *dl) { struct extent *e; int i; __u32 rv; /* for spares just return a minimal reservation which will grow * once the spare is picked up by an array */ if (dl->index == -1) return MPB_SECTOR_CNT; e = get_extents(super, dl); if (!e) return MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS; /* scroll to last entry */ for (i = 0; e[i].size; i++) continue; rv = total_blocks(&dl->disk) - e[i].start; free(e); return rv; } static int is_spare(struct imsm_disk *disk) { return (disk->status & SPARE_DISK) == SPARE_DISK; } static int is_configured(struct imsm_disk *disk) { return (disk->status & CONFIGURED_DISK) == CONFIGURED_DISK; } static int is_failed(struct imsm_disk *disk) { return (disk->status & FAILED_DISK) == FAILED_DISK; } /* try to determine how much space is reserved for metadata from * the last get_extents() entry on the smallest active disk, * otherwise fallback to the default */ static __u32 imsm_min_reserved_sectors(struct intel_super *super) { struct extent *e; int i; unsigned long long min_active; __u32 remainder; __u32 rv = MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS; struct dl *dl, *dl_min = NULL; if (!super) return rv; min_active = 0; for (dl = super->disks; dl; dl = dl->next) { if (dl->index < 0) continue; unsigned long long blocks = total_blocks(&dl->disk); if (blocks < min_active || min_active == 0) { dl_min = dl; min_active = blocks; } } if (!dl_min) return rv; /* find last lba used by subarrays on the smallest active disk */ e = get_extents(super, dl_min); if (!e) return rv; for (i = 0; e[i].size; i++) continue; remainder = min_active - e[i].start; free(e); /* to give priority to recovery we should not require full IMSM_RESERVED_SECTORS from the spare */ rv = MPB_SECTOR_CNT + NUM_BLOCKS_DIRTY_STRIPE_REGION; /* if real reservation is smaller use that value */ return (remainder < rv) ? remainder : rv; } /* Return minimum size of a spare that can be used in this array*/ static unsigned long long min_acceptable_spare_size_imsm(struct supertype *st) { struct intel_super *super = st->sb; struct dl *dl; struct extent *e; int i; unsigned long long rv = 0; if (!super) return rv; /* find first active disk in array */ dl = super->disks; while (dl && (is_failed(&dl->disk) || dl->index == -1)) dl = dl->next; if (!dl) return rv; /* find last lba used by subarrays */ e = get_extents(super, dl); if (!e) return rv; for (i = 0; e[i].size; i++) continue; if (i > 0) rv = e[i-1].start + e[i-1].size; free(e); /* add the amount of space needed for metadata */ rv = rv + imsm_min_reserved_sectors(super); return rv * 512; } static int is_gen_migration(struct imsm_dev *dev); #ifndef MDASSEMBLE static __u64 blocks_per_migr_unit(struct intel_super *super, struct imsm_dev *dev); static void print_imsm_dev(struct intel_super *super, struct imsm_dev *dev, char *uuid, int disk_idx) { __u64 sz; int slot, i; struct imsm_map *map = get_imsm_map(dev, MAP_0); struct imsm_map *map2 = get_imsm_map(dev, MAP_1); __u32 ord; printf("\n"); printf("[%.16s]:\n", dev->volume); printf(" UUID : %s\n", uuid); printf(" RAID Level : %d", get_imsm_raid_level(map)); if (map2) printf(" <-- %d", get_imsm_raid_level(map2)); printf("\n"); printf(" Members : %d", map->num_members); if (map2) printf(" <-- %d", map2->num_members); printf("\n"); printf(" Slots : ["); for (i = 0; i < map->num_members; i++) { ord = get_imsm_ord_tbl_ent(dev, i, MAP_0); printf("%s", ord & IMSM_ORD_REBUILD ? "_" : "U"); } printf("]"); if (map2) { printf(" <-- ["); for (i = 0; i < map2->num_members; i++) { ord = get_imsm_ord_tbl_ent(dev, i, MAP_1); printf("%s", ord & IMSM_ORD_REBUILD ? "_" : "U"); } printf("]"); } printf("\n"); printf(" Failed disk : "); if (map->failed_disk_num == 0xff) printf("none"); else printf("%i", map->failed_disk_num); printf("\n"); slot = get_imsm_disk_slot(map, disk_idx); if (slot >= 0) { ord = get_imsm_ord_tbl_ent(dev, slot, MAP_X); printf(" This Slot : %d%s\n", slot, ord & IMSM_ORD_REBUILD ? " (out-of-sync)" : ""); } else printf(" This Slot : ?\n"); sz = __le32_to_cpu(dev->size_high); sz <<= 32; sz += __le32_to_cpu(dev->size_low); printf(" Array Size : %llu%s\n", (unsigned long long)sz, human_size(sz * 512)); sz = blocks_per_member(map); printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz, human_size(sz * 512)); printf(" Sector Offset : %llu\n", pba_of_lba0(map)); printf(" Num Stripes : %llu\n", num_data_stripes(map)); printf(" Chunk Size : %u KiB", __le16_to_cpu(map->blocks_per_strip) / 2); if (map2) printf(" <-- %u KiB", __le16_to_cpu(map2->blocks_per_strip) / 2); printf("\n"); printf(" Reserved : %d\n", __le32_to_cpu(dev->reserved_blocks)); printf(" Migrate State : "); if (dev->vol.migr_state) { if (migr_type(dev) == MIGR_INIT) printf("initialize\n"); else if (migr_type(dev) == MIGR_REBUILD) printf("rebuild\n"); else if (migr_type(dev) == MIGR_VERIFY) printf("check\n"); else if (migr_type(dev) == MIGR_GEN_MIGR) printf("general migration\n"); else if (migr_type(dev) == MIGR_STATE_CHANGE) printf("state change\n"); else if (migr_type(dev) == MIGR_REPAIR) printf("repair\n"); else printf("<unknown:%d>\n", migr_type(dev)); } else printf("idle\n"); printf(" Map State : %s", map_state_str[map->map_state]); if (dev->vol.migr_state) { struct imsm_map *map = get_imsm_map(dev, MAP_1); printf(" <-- %s", map_state_str[map->map_state]); printf("\n Checkpoint : %u ", __le32_to_cpu(dev->vol.curr_migr_unit)); if ((is_gen_migration(dev)) && ((slot > 1) || (slot < 0))) printf("(N/A)"); else printf("(%llu)", (unsigned long long) blocks_per_migr_unit(super, dev)); } printf("\n"); printf(" Dirty State : %s\n", dev->vol.dirty ? "dirty" : "clean"); } static void print_imsm_disk(struct imsm_disk *disk, int index, __u32 reserved) { char str[MAX_RAID_SERIAL_LEN + 1]; __u64 sz; if (index < -1 || !disk) return; printf("\n"); snprintf(str, MAX_RAID_SERIAL_LEN + 1, "%s", disk->serial); if (index >= 0) printf(" Disk%02d Serial : %s\n", index, str); else printf(" Disk Serial : %s\n", str); printf(" State :%s%s%s\n", is_spare(disk) ? " spare" : "", is_configured(disk) ? " active" : "", is_failed(disk) ? " failed" : ""); printf(" Id : %08x\n", __le32_to_cpu(disk->scsi_id)); sz = total_blocks(disk) - reserved; printf(" Usable Size : %llu%s\n", (unsigned long long)sz, human_size(sz * 512)); } void examine_migr_rec_imsm(struct intel_super *super) { struct migr_record *migr_rec = super->migr_rec; struct imsm_super *mpb = super->anchor; int i; for (i = 0; i < mpb->num_raid_devs; i++) { struct imsm_dev *dev = __get_imsm_dev(mpb, i); struct imsm_map *map; int slot = -1; if (is_gen_migration(dev) == 0) continue; printf("\nMigration Record Information:"); /* first map under migration */ map = get_imsm_map(dev, MAP_0); if (map) slot = get_imsm_disk_slot(map, super->disks->index); if ((map == NULL) || (slot > 1) || (slot < 0)) { printf(" Empty\n "); printf("Examine one of first two disks in array\n"); break; } printf("\n Status : "); if (__le32_to_cpu(migr_rec->rec_status) == UNIT_SRC_NORMAL) printf("Normal\n"); else printf("Contains Data\n"); printf(" Current Unit : %u\n", __le32_to_cpu(migr_rec->curr_migr_unit)); printf(" Family : %u\n", __le32_to_cpu(migr_rec->family_num)); printf(" Ascending : %u\n", __le32_to_cpu(migr_rec->ascending_migr)); printf(" Blocks Per Unit : %u\n", __le32_to_cpu(migr_rec->blocks_per_unit)); printf(" Dest. Depth Per Unit : %u\n", __le32_to_cpu(migr_rec->dest_depth_per_unit)); printf(" Checkpoint Area pba : %u\n", __le32_to_cpu(migr_rec->ckpt_area_pba)); printf(" First member lba : %u\n", __le32_to_cpu(migr_rec->dest_1st_member_lba)); printf(" Total Number of Units : %u\n", __le32_to_cpu(migr_rec->num_migr_units)); printf(" Size of volume : %u\n", __le32_to_cpu(migr_rec->post_migr_vol_cap)); printf(" Expansion space for LBA64 : %u\n", __le32_to_cpu(migr_rec->post_migr_vol_cap_hi)); printf(" Record was read from : %u\n", __le32_to_cpu(migr_rec->ckpt_read_disk_num)); break; } } #endif /* MDASSEMBLE */ /******************************************************************************* * function: imsm_check_attributes * Description: Function checks if features represented by attributes flags * are supported by mdadm. * Parameters: * attributes - Attributes read from metadata * Returns: * 0 - passed attributes contains unsupported features flags * 1 - all features are supported ******************************************************************************/ static int imsm_check_attributes(__u32 attributes) { int ret_val = 1; __u32 not_supported = MPB_ATTRIB_SUPPORTED^0xffffffff; not_supported &= ~MPB_ATTRIB_IGNORED; not_supported &= attributes; if (not_supported) { pr_err("(IMSM): Unsupported attributes : %x\n", (unsigned)__le32_to_cpu(not_supported)); if (not_supported & MPB_ATTRIB_CHECKSUM_VERIFY) { dprintf("\t\tMPB_ATTRIB_CHECKSUM_VERIFY \n"); not_supported ^= MPB_ATTRIB_CHECKSUM_VERIFY; } if (not_supported & MPB_ATTRIB_2TB) { dprintf("\t\tMPB_ATTRIB_2TB\n"); not_supported ^= MPB_ATTRIB_2TB; } if (not_supported & MPB_ATTRIB_RAID0) { dprintf("\t\tMPB_ATTRIB_RAID0\n"); not_supported ^= MPB_ATTRIB_RAID0; } if (not_supported & MPB_ATTRIB_RAID1) { dprintf("\t\tMPB_ATTRIB_RAID1\n"); not_supported ^= MPB_ATTRIB_RAID1; } if (not_supported & MPB_ATTRIB_RAID10) { dprintf("\t\tMPB_ATTRIB_RAID10\n"); not_supported ^= MPB_ATTRIB_RAID10; } if (not_supported & MPB_ATTRIB_RAID1E) { dprintf("\t\tMPB_ATTRIB_RAID1E\n"); not_supported ^= MPB_ATTRIB_RAID1E; } if (not_supported & MPB_ATTRIB_RAID5) { dprintf("\t\tMPB_ATTRIB_RAID5\n"); not_supported ^= MPB_ATTRIB_RAID5; } if (not_supported & MPB_ATTRIB_RAIDCNG) { dprintf("\t\tMPB_ATTRIB_RAIDCNG\n"); not_supported ^= MPB_ATTRIB_RAIDCNG; } if (not_supported & MPB_ATTRIB_BBM) { dprintf("\t\tMPB_ATTRIB_BBM\n"); not_supported ^= MPB_ATTRIB_BBM; } if (not_supported & MPB_ATTRIB_CHECKSUM_VERIFY) { dprintf("\t\tMPB_ATTRIB_CHECKSUM_VERIFY (== MPB_ATTRIB_LEGACY)\n"); not_supported ^= MPB_ATTRIB_CHECKSUM_VERIFY; } if (not_supported & MPB_ATTRIB_EXP_STRIPE_SIZE) { dprintf("\t\tMPB_ATTRIB_EXP_STRIP_SIZE\n"); not_supported ^= MPB_ATTRIB_EXP_STRIPE_SIZE; } if (not_supported & MPB_ATTRIB_2TB_DISK) { dprintf("\t\tMPB_ATTRIB_2TB_DISK\n"); not_supported ^= MPB_ATTRIB_2TB_DISK; } if (not_supported & MPB_ATTRIB_NEVER_USE2) { dprintf("\t\tMPB_ATTRIB_NEVER_USE2\n"); not_supported ^= MPB_ATTRIB_NEVER_USE2; } if (not_supported & MPB_ATTRIB_NEVER_USE) { dprintf("\t\tMPB_ATTRIB_NEVER_USE\n"); not_supported ^= MPB_ATTRIB_NEVER_USE; } if (not_supported) dprintf(Name "(IMSM): Unknown attributes : %x\n", not_supported); ret_val = 0; } return ret_val; } #ifndef MDASSEMBLE static void getinfo_super_imsm(struct supertype *st, struct mdinfo *info, char *map); static void examine_super_imsm(struct supertype *st, char *homehost) { struct intel_super *super = st->sb; struct imsm_super *mpb = super->anchor; char str[MAX_SIGNATURE_LENGTH]; int i; struct mdinfo info; char nbuf[64]; __u32 sum; __u32 reserved = imsm_reserved_sectors(super, super->disks); struct dl *dl; snprintf(str, MPB_SIG_LEN, "%s", mpb->sig); printf(" Magic : %s\n", str); snprintf(str, strlen(MPB_VERSION_RAID0), "%s", get_imsm_version(mpb)); printf(" Version : %s\n", get_imsm_version(mpb)); printf(" Orig Family : %08x\n", __le32_to_cpu(mpb->orig_family_num)); printf(" Family : %08x\n", __le32_to_cpu(mpb->family_num)); printf(" Generation : %08x\n", __le32_to_cpu(mpb->generation_num)); printf(" Attributes : "); if (imsm_check_attributes(mpb->attributes)) printf("All supported\n"); else printf("not supported\n"); getinfo_super_imsm(st, &info, NULL); fname_from_uuid(st, &info, nbuf, ':'); printf(" UUID : %s\n", nbuf + 5); sum = __le32_to_cpu(mpb->check_sum); printf(" Checksum : %08x %s\n", sum, __gen_imsm_checksum(mpb) == sum ? "correct" : "incorrect"); printf(" MPB Sectors : %d\n", mpb_sectors(mpb)); printf(" Disks : %d\n", mpb->num_disks); printf(" RAID Devices : %d\n", mpb->num_raid_devs); print_imsm_disk(__get_imsm_disk(mpb, super->disks->index), super->disks->index, reserved); if (super->bbm_log) { struct bbm_log *log = super->bbm_log; printf("\n"); printf("Bad Block Management Log:\n"); printf(" Log Size : %d\n", __le32_to_cpu(mpb->bbm_log_size)); printf(" Signature : %x\n", __le32_to_cpu(log->signature)); printf(" Entry Count : %d\n", __le32_to_cpu(log->entry_count)); printf(" Spare Blocks : %d\n", __le32_to_cpu(log->reserved_spare_block_count)); printf(" First Spare : %llx\n", (unsigned long long) __le64_to_cpu(log->first_spare_lba)); } for (i = 0; i < mpb->num_raid_devs; i++) { struct mdinfo info; struct imsm_dev *dev = __get_imsm_dev(mpb, i); super->current_vol = i; getinfo_super_imsm(st, &info, NULL); fname_from_uuid(st, &info, nbuf, ':'); print_imsm_dev(super, dev, nbuf + 5, super->disks->index); } for (i = 0; i < mpb->num_disks; i++) { if (i == super->disks->index) continue; print_imsm_disk(__get_imsm_disk(mpb, i), i, reserved); } for (dl = super->disks; dl; dl = dl->next) if (dl->index == -1) print_imsm_disk(&dl->disk, -1, reserved); examine_migr_rec_imsm(super); } static void brief_examine_super_imsm(struct supertype *st, int verbose) { /* We just write a generic IMSM ARRAY entry */ struct mdinfo info; char nbuf[64]; struct intel_super *super = st->sb; if (!super->anchor->num_raid_devs) { printf("ARRAY metadata=imsm\n"); return; } getinfo_super_imsm(st, &info, NULL); fname_from_uuid(st, &info, nbuf, ':'); printf("ARRAY metadata=imsm UUID=%s\n", nbuf + 5); } static void brief_examine_subarrays_imsm(struct supertype *st, int verbose) { /* We just write a generic IMSM ARRAY entry */ struct mdinfo info; char nbuf[64]; char nbuf1[64]; struct intel_super *super = st->sb; int i; if (!super->anchor->num_raid_devs) return; getinfo_super_imsm(st, &info, NULL); fname_from_uuid(st, &info, nbuf, ':'); for (i = 0; i < super->anchor->num_raid_devs; i++) { struct imsm_dev *dev = get_imsm_dev(super, i); super->current_vol = i; getinfo_super_imsm(st, &info, NULL); fname_from_uuid(st, &info, nbuf1, ':'); printf("ARRAY /dev/md/%.16s container=%s member=%d UUID=%s\n", dev->volume, nbuf + 5, i, nbuf1 + 5); } } static void export_examine_super_imsm(struct supertype *st) { struct intel_super *super = st->sb; struct imsm_super *mpb = super->anchor; struct mdinfo info; char nbuf[64]; getinfo_super_imsm(st, &info, NULL); fname_from_uuid(st, &info, nbuf, ':'); printf("MD_METADATA=imsm\n"); printf("MD_LEVEL=container\n"); printf("MD_UUID=%s\n", nbuf+5); printf("MD_DEVICES=%u\n", mpb->num_disks); } static int copy_metadata_imsm(struct supertype *st, int from, int to) { /* The second last 512byte sector of the device contains * the "struct imsm_super" metadata. * This contains mpb_size which is the size in bytes of the * extended metadata. This is located immediately before * the imsm_super. * We want to read all that, plus the last sector which * may contain a migration record, and write it all * to the target. */ void *buf; unsigned long long dsize, offset; int sectors; struct imsm_super *sb; int written = 0; if (posix_memalign(&buf, 4096, 4096) != 0) return 1; if (!get_dev_size(from, NULL, &dsize)) goto err; if (lseek64(from, dsize-1024, 0) < 0) goto err; if (read(from, buf, 512) != 512) goto err; sb = buf; if (strncmp((char*)sb->sig, MPB_SIGNATURE, MPB_SIG_LEN) != 0) goto err; sectors = mpb_sectors(sb) + 2; offset = dsize - sectors * 512; if (lseek64(from, offset, 0) < 0 || lseek64(to, offset, 0) < 0) goto err; while (written < sectors * 512) { int n = sectors*512 - written; if (n > 4096) n = 4096; if (read(from, buf, n) != n) goto err; if (write(to, buf, n) != n) goto err; written += n; } free(buf); return 0; err: free(buf); return 1; } static void detail_super_imsm(struct supertype *st, char *homehost) { struct mdinfo info; char nbuf[64]; getinfo_super_imsm(st, &info, NULL); fname_from_uuid(st, &info, nbuf, ':'); printf("\n UUID : %s\n", nbuf + 5); } static void brief_detail_super_imsm(struct supertype *st) { struct mdinfo info; char nbuf[64]; getinfo_super_imsm(st, &info, NULL); fname_from_uuid(st, &info, nbuf, ':'); printf(" UUID=%s", nbuf + 5); } static int imsm_read_serial(int fd, char *devname, __u8 *serial); static void fd2devname(int fd, char *name); static int ahci_enumerate_ports(const char *hba_path, int port_count, int host_base, int verbose) { /* dump an unsorted list of devices attached to AHCI Intel storage * controller, as well as non-connected ports */ int hba_len = strlen(hba_path) + 1; struct dirent *ent; DIR *dir; char *path = NULL; int err = 0; unsigned long port_mask = (1 << port_count) - 1; if (port_count > (int)sizeof(port_mask) * 8) { if (verbose > 0) pr_err("port_count %d out of range\n", port_count); return 2; } /* scroll through /sys/dev/block looking for devices attached to * this hba */ dir = opendir("/sys/dev/block"); for (ent = dir ? readdir(dir) : NULL; ent; ent = readdir(dir)) { int fd; char model[64]; char vendor[64]; char buf[1024]; int major, minor; char *device; char *c; int port; int type; if (sscanf(ent->d_name, "%d:%d", &major, &minor) != 2) continue; path = devt_to_devpath(makedev(major, minor)); if (!path) continue; if (!path_attached_to_hba(path, hba_path)) { free(path); path = NULL; continue; } /* retrieve the scsi device type */ if (asprintf(&device, "/sys/dev/block/%d:%d/device/xxxxxxx", major, minor) < 0) { if (verbose > 0) pr_err("failed to allocate 'device'\n"); err = 2; break; } sprintf(device, "/sys/dev/block/%d:%d/device/type", major, minor); if (load_sys(device, buf) != 0) { if (verbose > 0) pr_err("failed to read device type for %s\n", path); err = 2; free(device); break; } type = strtoul(buf, NULL, 10); /* if it's not a disk print the vendor and model */ if (!(type == 0 || type == 7 || type == 14)) { vendor[0] = '\0'; model[0] = '\0'; sprintf(device, "/sys/dev/block/%d:%d/device/vendor", major, minor); if (load_sys(device, buf) == 0) { strncpy(vendor, buf, sizeof(vendor)); vendor[sizeof(vendor) - 1] = '\0'; c = (char *) &vendor[sizeof(vendor) - 1]; while (isspace(*c) || *c == '\0') *c-- = '\0'; } sprintf(device, "/sys/dev/block/%d:%d/device/model", major, minor); if (load_sys(device, buf) == 0) { strncpy(model, buf, sizeof(model)); model[sizeof(model) - 1] = '\0'; c = (char *) &model[sizeof(model) - 1]; while (isspace(*c) || *c == '\0') *c-- = '\0'; } if (vendor[0] && model[0]) sprintf(buf, "%.64s %.64s", vendor, model); else switch (type) { /* numbers from hald/linux/device.c */ case 1: sprintf(buf, "tape"); break; case 2: sprintf(buf, "printer"); break; case 3: sprintf(buf, "processor"); break; case 4: case 5: sprintf(buf, "cdrom"); break; case 6: sprintf(buf, "scanner"); break; case 8: sprintf(buf, "media_changer"); break; case 9: sprintf(buf, "comm"); break; case 12: sprintf(buf, "raid"); break; default: sprintf(buf, "unknown"); } } else buf[0] = '\0'; free(device); /* chop device path to 'host%d' and calculate the port number */ c = strchr(&path[hba_len], '/'); if (!c) { if (verbose > 0) pr_err("%s - invalid path name\n", path + hba_len); err = 2; break; } *c = '\0'; if (sscanf(&path[hba_len], "host%d", &port) == 1) port -= host_base; else { if (verbose > 0) { *c = '/'; /* repair the full string */ pr_err("failed to determine port number for %s\n", path); } err = 2; break; } /* mark this port as used */ port_mask &= ~(1 << port); /* print out the device information */ if (buf[0]) { printf(" Port%d : - non-disk device (%s) -\n", port, buf); continue; } fd = dev_open(ent->d_name, O_RDONLY); if (fd < 0) printf(" Port%d : - disk info unavailable -\n", port); else { fd2devname(fd, buf); printf(" Port%d : %s", port, buf); if (imsm_read_serial(fd, NULL, (__u8 *) buf) == 0) printf(" (%.*s)\n", MAX_RAID_SERIAL_LEN, buf); else printf(" ()\n"); close(fd); } free(path); path = NULL; } if (path) free(path); if (dir) closedir(dir); if (err == 0) { int i; for (i = 0; i < port_count; i++) if (port_mask & (1 << i)) printf(" Port%d : - no device attached -\n", i); } return err; } static void print_found_intel_controllers(struct sys_dev *elem) { for (; elem; elem = elem->next) { pr_err("found Intel(R) "); if (elem->type == SYS_DEV_SATA) fprintf(stderr, "SATA "); else if (elem->type == SYS_DEV_SAS) fprintf(stderr, "SAS "); fprintf(stderr, "RAID controller"); if (elem->pci_id) fprintf(stderr, " at %s", elem->pci_id); fprintf(stderr, ".\n"); } fflush(stderr); } static int ahci_get_port_count(const char *hba_path, int *port_count) { struct dirent *ent; DIR *dir; int host_base = -1; *port_count = 0; if ((dir = opendir(hba_path)) == NULL) return -1; for (ent = readdir(dir); ent; ent = readdir(dir)) { int host; if (sscanf(ent->d_name, "host%d", &host) != 1) continue; if (*port_count == 0) host_base = host; else if (host < host_base) host_base = host; if (host + 1 > *port_count + host_base) *port_count = host + 1 - host_base; } closedir(dir); return host_base; } static void print_imsm_capability(const struct imsm_orom *orom) { printf(" Platform : Intel(R) Matrix Storage Manager\n"); printf(" Version : %d.%d.%d.%d\n", orom->major_ver, orom->minor_ver, orom->hotfix_ver, orom->build); printf(" RAID Levels :%s%s%s%s%s\n", imsm_orom_has_raid0(orom) ? " raid0" : "", imsm_orom_has_raid1(orom) ? " raid1" : "", imsm_orom_has_raid1e(orom) ? " raid1e" : "", imsm_orom_has_raid10(orom) ? " raid10" : "", imsm_orom_has_raid5(orom) ? " raid5" : ""); printf(" Chunk Sizes :%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", imsm_orom_has_chunk(orom, 2) ? " 2k" : "", imsm_orom_has_chunk(orom, 4) ? " 4k" : "", imsm_orom_has_chunk(orom, 8) ? " 8k" : "", imsm_orom_has_chunk(orom, 16) ? " 16k" : "", imsm_orom_has_chunk(orom, 32) ? " 32k" : "", imsm_orom_has_chunk(orom, 64) ? " 64k" : "", imsm_orom_has_chunk(orom, 128) ? " 128k" : "", imsm_orom_has_chunk(orom, 256) ? " 256k" : "", imsm_orom_has_chunk(orom, 512) ? " 512k" : "", imsm_orom_has_chunk(orom, 1024*1) ? " 1M" : "", imsm_orom_has_chunk(orom, 1024*2) ? " 2M" : "", imsm_orom_has_chunk(orom, 1024*4) ? " 4M" : "", imsm_orom_has_chunk(orom, 1024*8) ? " 8M" : "", imsm_orom_has_chunk(orom, 1024*16) ? " 16M" : "", imsm_orom_has_chunk(orom, 1024*32) ? " 32M" : "", imsm_orom_has_chunk(orom, 1024*64) ? " 64M" : ""); printf(" 2TB volumes :%s supported\n", (orom->attr & IMSM_OROM_ATTR_2TB)?"":" not"); printf(" 2TB disks :%s supported\n", (orom->attr & IMSM_OROM_ATTR_2TB_DISK)?"":" not"); printf(" Max Disks : %d\n", orom->tds); printf(" Max Volumes : %d per array, %d per controller\n", orom->vpa, orom->vphba); return; } static void print_imsm_capability_export(const struct imsm_orom *orom) { printf("MD_FIRMWARE_TYPE=imsm\n"); printf("IMSM_VERSION=%d.%d.%d.%d\n",orom->major_ver, orom->minor_ver, orom->hotfix_ver, orom->build); printf("IMSM_SUPPORTED_RAID_LEVELS=%s%s%s%s%s\n", imsm_orom_has_raid0(orom) ? "raid0 " : "", imsm_orom_has_raid1(orom) ? "raid1 " : "", imsm_orom_has_raid1e(orom) ? "raid1e " : "", imsm_orom_has_raid5(orom) ? "raid10 " : "", imsm_orom_has_raid10(orom) ? "raid5 " : ""); printf("IMSM_SUPPORTED_CHUNK_SIZES=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", imsm_orom_has_chunk(orom, 2) ? "2k " : "", imsm_orom_has_chunk(orom, 4) ? "4k " : "", imsm_orom_has_chunk(orom, 8) ? "8k " : "", imsm_orom_has_chunk(orom, 16) ? "16k " : "", imsm_orom_has_chunk(orom, 32) ? "32k " : "", imsm_orom_has_chunk(orom, 64) ? "64k " : "", imsm_orom_has_chunk(orom, 128) ? "128k " : "", imsm_orom_has_chunk(orom, 256) ? "256k " : "", imsm_orom_has_chunk(orom, 512) ? "512k " : "", imsm_orom_has_chunk(orom, 1024*1) ? "1M " : "", imsm_orom_has_chunk(orom, 1024*2) ? "2M " : "", imsm_orom_has_chunk(orom, 1024*4) ? "4M " : "", imsm_orom_has_chunk(orom, 1024*8) ? "8M " : "", imsm_orom_has_chunk(orom, 1024*16) ? "16M " : "", imsm_orom_has_chunk(orom, 1024*32) ? "32M " : "", imsm_orom_has_chunk(orom, 1024*64) ? "64M " : ""); printf("IMSM_2TB_VOLUMES=%s\n",(orom->attr & IMSM_OROM_ATTR_2TB) ? "yes" : "no"); printf("IMSM_2TB_DISKS=%s\n",(orom->attr & IMSM_OROM_ATTR_2TB_DISK) ? "yes" : "no"); printf("IMSM_MAX_DISKS=%d\n",orom->tds); printf("IMSM_MAX_VOLUMES_PER_ARRAY=%d\n",orom->vpa); printf("IMSM_MAX_VOLUMES_PER_CONTROLLER=%d\n",orom->vphba); } static int detail_platform_imsm(int verbose, int enumerate_only, char *controller_path) { /* There are two components to imsm platform support, the ahci SATA * controller and the option-rom. To find the SATA controller we * simply look in /sys/bus/pci/drivers/ahci to see if an ahci * controller with the Intel vendor id is present. This approach * allows mdadm to leverage the kernel's ahci detection logic, with the * caveat that if ahci.ko is not loaded mdadm will not be able to * detect platform raid capabilities. The option-rom resides in a * platform "Adapter ROM". We scan for its signature to retrieve the * platform capabilities. If raid support is disabled in the BIOS the * option-rom capability structure will not be available. */ const struct imsm_orom *orom; struct sys_dev *list, *hba; int host_base = 0; int port_count = 0; int result=1; if (enumerate_only) { if (check_env("IMSM_NO_PLATFORM")) return 0; list = find_intel_devices(); if (!list) return 2; for (hba = list; hba; hba = hba->next) { orom = find_imsm_capability(hba->type); if (!orom) { result = 2; break; } else result = 0; } return result; } list = find_intel_devices(); if (!list) { if (verbose > 0) pr_err("no active Intel(R) RAID " "controller found.\n"); return 2; } else if (verbose > 0) print_found_intel_controllers(list); for (hba = list; hba; hba = hba->next) { if (controller_path && (compare_paths(hba->path,controller_path) != 0)) continue; orom = find_imsm_capability(hba->type); if (!orom) pr_err("imsm capabilities not found for controller: %s (type %s)\n", hba->path, get_sys_dev_type(hba->type)); else { result = 0; print_imsm_capability(orom); printf(" I/O Controller : %s (%s)\n", hba->path, get_sys_dev_type(hba->type)); if (hba->type == SYS_DEV_SATA) { host_base = ahci_get_port_count(hba->path, &port_count); if (ahci_enumerate_ports(hba->path, port_count, host_base, verbose)) { if (verbose > 0) pr_err("failed to enumerate " "ports on SATA controller at %s.\n", hba->pci_id); result |= 2; } } } } if (controller_path && result == 1) pr_err("no active Intel(R) RAID " "controller found under %s\n",controller_path); return result; } static int export_detail_platform_imsm(int verbose, char *controller_path) { const struct imsm_orom *orom; struct sys_dev *list, *hba; int result=1; list = find_intel_devices(); if (!list) { if (verbose > 0) pr_err("IMSM_DETAIL_PLATFORM_ERROR=NO_INTEL_DEVICES\n"); result = 2; return result; } for (hba = list; hba; hba = hba->next) { if (controller_path && (compare_paths(hba->path,controller_path) != 0)) continue; orom = find_imsm_capability(hba->type); if (!orom) { if (verbose > 0) pr_err("IMSM_DETAIL_PLATFORM_ERROR=NO_IMSM_CAPABLE_DEVICE_UNDER_%s\n",hba->path); } else { print_imsm_capability_export(orom); result = 0; } } return result; } #endif static int match_home_imsm(struct supertype *st, char *homehost) { /* the imsm metadata format does not specify any host * identification information. We return -1 since we can never * confirm nor deny whether a given array is "meant" for this * host. We rely on compare_super and the 'family_num' fields to * exclude member disks that do not belong, and we rely on * mdadm.conf to specify the arrays that should be assembled. * Auto-assembly may still pick up "foreign" arrays. */ return -1; } static void uuid_from_super_imsm(struct supertype *st, int uuid[4]) { /* The uuid returned here is used for: * uuid to put into bitmap file (Create, Grow) * uuid for backup header when saving critical section (Grow) * comparing uuids when re-adding a device into an array * In these cases the uuid required is that of the data-array, * not the device-set. * uuid to recognise same set when adding a missing device back * to an array. This is a uuid for the device-set. * * For each of these we can make do with a truncated * or hashed uuid rather than the original, as long as * everyone agrees. * In each case the uuid required is that of the data-array, * not the device-set. */ /* imsm does not track uuid's so we synthesis one using sha1 on * - The signature (Which is constant for all imsm array, but no matter) * - the orig_family_num of the container * - the index number of the volume * - the 'serial' number of the volume. * Hopefully these are all constant. */ struct intel_super *super = st->sb; char buf[20]; struct sha1_ctx ctx; struct imsm_dev *dev = NULL; __u32 family_num; /* some mdadm versions failed to set ->orig_family_num, in which * case fall back to ->family_num. orig_family_num will be * fixed up with the first metadata update. */ family_num = super->anchor->orig_family_num; if (family_num == 0) family_num = super->anchor->family_num; sha1_init_ctx(&ctx); sha1_process_bytes(super->anchor->sig, MPB_SIG_LEN, &ctx); sha1_process_bytes(&family_num, sizeof(__u32), &ctx); if (super->current_vol >= 0) dev = get_imsm_dev(super, super->current_vol); if (dev) { __u32 vol = super->current_vol; sha1_process_bytes(&vol, sizeof(vol), &ctx); sha1_process_bytes(dev->volume, MAX_RAID_SERIAL_LEN, &ctx); } sha1_finish_ctx(&ctx, buf); memcpy(uuid, buf, 4*4); } #if 0 static void get_imsm_numerical_version(struct imsm_super *mpb, int *m, int *p) { __u8 *v = get_imsm_version(mpb); __u8 *end = mpb->sig + MAX_SIGNATURE_LENGTH; char major[] = { 0, 0, 0 }; char minor[] = { 0 ,0, 0 }; char patch[] = { 0, 0, 0 }; char *ver_parse[] = { major, minor, patch }; int i, j; i = j = 0; while (*v != '\0' && v < end) { if (*v != '.' && j < 2) ver_parse[i][j++] = *v; else { i++; j = 0; } v++; } *m = strtol(minor, NULL, 0); *p = strtol(patch, NULL, 0); } #endif static __u32 migr_strip_blocks_resync(struct imsm_dev *dev) { /* migr_strip_size when repairing or initializing parity */ struct imsm_map *map = get_imsm_map(dev, MAP_0); __u32 chunk = __le32_to_cpu(map->blocks_per_strip); switch (get_imsm_raid_level(map)) { case 5: case 10: return chunk; default: return 128*1024 >> 9; } } static __u32 migr_strip_blocks_rebuild(struct imsm_dev *dev) { /* migr_strip_size when rebuilding a degraded disk, no idea why * this is different than migr_strip_size_resync(), but it's good * to be compatible */ struct imsm_map *map = get_imsm_map(dev, MAP_1); __u32 chunk = __le32_to_cpu(map->blocks_per_strip); switch (get_imsm_raid_level(map)) { case 1: case 10: if (map->num_members % map->num_domains == 0) return 128*1024 >> 9; else return chunk; case 5: return max((__u32) 64*1024 >> 9, chunk); default: return 128*1024 >> 9; } } static __u32 num_stripes_per_unit_resync(struct imsm_dev *dev) { struct imsm_map *lo = get_imsm_map(dev, MAP_0); struct imsm_map *hi = get_imsm_map(dev, MAP_1); __u32 lo_chunk = __le32_to_cpu(lo->blocks_per_strip); __u32 hi_chunk = __le32_to_cpu(hi->blocks_per_strip); return max((__u32) 1, hi_chunk / lo_chunk); } static __u32 num_stripes_per_unit_rebuild(struct imsm_dev *dev) { struct imsm_map *lo = get_imsm_map(dev, MAP_0); int level = get_imsm_raid_level(lo); if (level == 1 || level == 10) { struct imsm_map *hi = get_imsm_map(dev, MAP_1); return hi->num_domains; } else return num_stripes_per_unit_resync(dev); } static __u8 imsm_num_data_members(struct imsm_dev *dev, int second_map) { /* named 'imsm_' because raid0, raid1 and raid10 * counter-intuitively have the same number of data disks */ struct imsm_map *map = get_imsm_map(dev, second_map); switch (get_imsm_raid_level(map)) { case 0: return map->num_members; break; case 1: case 10: return map->num_members/2; case 5: return map->num_members - 1; default: dprintf("%s: unsupported raid level\n", __func__); return 0; } } static __u32 parity_segment_depth(struct imsm_dev *dev) { struct imsm_map *map = get_imsm_map(dev, MAP_0); __u32 chunk = __le32_to_cpu(map->blocks_per_strip); switch(get_imsm_raid_level(map)) { case 1: case 10: return chunk * map->num_domains; case 5: return chunk * map->num_members; default: return chunk; } } static __u32 map_migr_block(struct imsm_dev *dev, __u32 block) { struct imsm_map *map = get_imsm_map(dev, MAP_1); __u32 chunk = __le32_to_cpu(map->blocks_per_strip); __u32 strip = block / chunk; switch (get_imsm_raid_level(map)) { case 1: case 10: { __u32 vol_strip = (strip * map->num_domains) + 1; __u32 vol_stripe = vol_strip / map->num_members; return vol_stripe * chunk + block % chunk; } case 5: { __u32 stripe = strip / (map->num_members - 1); return stripe * chunk + block % chunk; } default: return 0; } } static __u64 blocks_per_migr_unit(struct intel_super *super, struct imsm_dev *dev) { /* calculate the conversion factor between per member 'blocks' * (md/{resync,rebuild}_start) and imsm migration units, return * 0 for the 'not migrating' and 'unsupported migration' cases */ if (!dev->vol.migr_state) return 0; switch (migr_type(dev)) { case MIGR_GEN_MIGR: { struct migr_record *migr_rec = super->migr_rec; return __le32_to_cpu(migr_rec->blocks_per_unit); } case MIGR_VERIFY: case MIGR_REPAIR: case MIGR_INIT: { struct imsm_map *map = get_imsm_map(dev, MAP_0); __u32 stripes_per_unit; __u32 blocks_per_unit; __u32 parity_depth; __u32 migr_chunk; __u32 block_map; __u32 block_rel; __u32 segment; __u32 stripe; __u8 disks; /* yes, this is really the translation of migr_units to * per-member blocks in the 'resync' case */ stripes_per_unit = num_stripes_per_unit_resync(dev); migr_chunk = migr_strip_blocks_resync(dev); disks = imsm_num_data_members(dev, MAP_0); blocks_per_unit = stripes_per_unit * migr_chunk * disks; stripe = __le16_to_cpu(map->blocks_per_strip) * disks; segment = blocks_per_unit / stripe; block_rel = blocks_per_unit - segment * stripe; parity_depth = parity_segment_depth(dev); block_map = map_migr_block(dev, block_rel); return block_map + parity_depth * segment; } case MIGR_REBUILD: { __u32 stripes_per_unit; __u32 migr_chunk; stripes_per_unit = num_stripes_per_unit_rebuild(dev); migr_chunk = migr_strip_blocks_rebuild(dev); return migr_chunk * stripes_per_unit; } case MIGR_STATE_CHANGE: default: return 0; } } static int imsm_level_to_layout(int level) { switch (level) { case 0: case 1: return 0; case 5: case 6: return ALGORITHM_LEFT_ASYMMETRIC; case 10: return 0x102; } return UnSet; } /******************************************************************************* * Function: read_imsm_migr_rec * Description: Function reads imsm migration record from last sector of disk * Parameters: * fd : disk descriptor * super : metadata info * Returns: * 0 : success, * -1 : fail ******************************************************************************/ static int read_imsm_migr_rec(int fd, struct intel_super *super) { int ret_val = -1; unsigned long long dsize; get_dev_size(fd, NULL, &dsize); if (lseek64(fd, dsize - MIGR_REC_POSITION, SEEK_SET) < 0) { pr_err("Cannot seek to anchor block: %s\n", strerror(errno)); goto out; } if (read(fd, super->migr_rec_buf, MIGR_REC_BUF_SIZE) != MIGR_REC_BUF_SIZE) { pr_err("Cannot read migr record block: %s\n", strerror(errno)); goto out; } ret_val = 0; out: return ret_val; } static struct imsm_dev *imsm_get_device_during_migration( struct intel_super *super) { struct intel_dev *dv; for (dv = super->devlist; dv; dv = dv->next) { if (is_gen_migration(dv->dev)) return dv->dev; } return NULL; } /******************************************************************************* * Function: load_imsm_migr_rec * Description: Function reads imsm migration record (it is stored at the last * sector of disk) * Parameters: * super : imsm internal array info * info : general array info * Returns: * 0 : success * -1 : fail * -2 : no migration in progress ******************************************************************************/ static int load_imsm_migr_rec(struct intel_super *super, struct mdinfo *info) { struct mdinfo *sd; struct dl *dl = NULL; char nm[30]; int retval = -1; int fd = -1; struct imsm_dev *dev; struct imsm_map *map = NULL; int slot = -1; /* find map under migration */ dev = imsm_get_device_during_migration(super); /* nothing to load,no migration in progress? */ if (dev == NULL) return -2; map = get_imsm_map(dev, MAP_0); if (info) { for (sd = info->devs ; sd ; sd = sd->next) { /* skip spare and failed disks */ if (sd->disk.raid_disk < 0) continue; /* read only from one of the first two slots */ if (map) slot = get_imsm_disk_slot(map, sd->disk.raid_disk); if ((map == NULL) || (slot > 1) || (slot < 0)) continue; sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor); fd = dev_open(nm, O_RDONLY); if (fd >= 0) break; } } if (fd < 0) { for (dl = super->disks; dl; dl = dl->next) { /* skip spare and failed disks */ if (dl->index < 0) continue; /* read only from one of the first two slots */ if (map) slot = get_imsm_disk_slot(map, dl->index); if ((map == NULL) || (slot > 1) || (slot < 0)) continue; sprintf(nm, "%d:%d", dl->major, dl->minor); fd = dev_open(nm, O_RDONLY); if (fd >= 0) break; } } if (fd < 0) goto out; retval = read_imsm_migr_rec(fd, super); out: if (fd >= 0) close(fd); return retval; } #ifndef MDASSEMBLE /******************************************************************************* * function: imsm_create_metadata_checkpoint_update * Description: It creates update for checkpoint change. * Parameters: * super : imsm internal array info * u : pointer to prepared update * Returns: * Uptate length. * If length is equal to 0, input pointer u contains no update ******************************************************************************/ static int imsm_create_metadata_checkpoint_update( struct intel_super *super, struct imsm_update_general_migration_checkpoint **u) { int update_memory_size = 0; dprintf("imsm_create_metadata_checkpoint_update(enter)\n"); if (u == NULL) return 0; *u = NULL; /* size of all update data without anchor */ update_memory_size = sizeof(struct imsm_update_general_migration_checkpoint); *u = xcalloc(1, update_memory_size); if (*u == NULL) { dprintf("error: cannot get memory for " "imsm_create_metadata_checkpoint_update update\n"); return 0; } (*u)->type = update_general_migration_checkpoint; (*u)->curr_migr_unit = __le32_to_cpu(super->migr_rec->curr_migr_unit); dprintf("imsm_create_metadata_checkpoint_update: prepared for %u\n", (*u)->curr_migr_unit); return update_memory_size; } static void imsm_update_metadata_locally(struct supertype *st, void *buf, int len); /******************************************************************************* * Function: write_imsm_migr_rec * Description: Function writes imsm migration record * (at the last sector of disk) * Parameters: * super : imsm internal array info * Returns: * 0 : success * -1 : if fail ******************************************************************************/ static int write_imsm_migr_rec(struct supertype *st) { struct intel_super *super = st->sb; unsigned long long dsize; char nm[30]; int fd = -1; int retval = -1; struct dl *sd; int len; struct imsm_update_general_migration_checkpoint *u; struct imsm_dev *dev; struct imsm_map *map = NULL; /* find map under migration */ dev = imsm_get_device_during_migration(super); /* if no migration, write buffer anyway to clear migr_record * on disk based on first available device */ if (dev == NULL) dev = get_imsm_dev(super, super->current_vol < 0 ? 0 : super->current_vol); map = get_imsm_map(dev, MAP_0); for (sd = super->disks ; sd ; sd = sd->next) { int slot = -1; /* skip failed and spare devices */ if (sd->index < 0) continue; /* write to 2 first slots only */ if (map) slot = get_imsm_disk_slot(map, sd->index); if ((map == NULL) || (slot > 1) || (slot < 0)) continue; sprintf(nm, "%d:%d", sd->major, sd->minor); fd = dev_open(nm, O_RDWR); if (fd < 0) continue; get_dev_size(fd, NULL, &dsize); if (lseek64(fd, dsize - MIGR_REC_POSITION, SEEK_SET) < 0) { pr_err("Cannot seek to anchor block: %s\n", strerror(errno)); goto out; } if (write(fd, super->migr_rec_buf, MIGR_REC_BUF_SIZE) != MIGR_REC_BUF_SIZE) { pr_err("Cannot write migr record block: %s\n", strerror(errno)); goto out; } close(fd); fd = -1; } /* update checkpoint information in metadata */ len = imsm_create_metadata_checkpoint_update(super, &u); if (len <= 0) { dprintf("imsm: Cannot prepare update\n"); goto out; } /* update metadata locally */ imsm_update_metadata_locally(st, u, len); /* and possibly remotely */ if (st->update_tail) { append_metadata_update(st, u, len); /* during reshape we do all work inside metadata handler * manage_reshape(), so metadata update has to be triggered * insida it */ flush_metadata_updates(st); st->update_tail = &st->updates; } else free(u); retval = 0; out: if (fd >= 0) close(fd); return retval; } #endif /* MDASSEMBLE */ /* spare/missing disks activations are not allowe when * array/container performs reshape operation, because * all arrays in container works on the same disks set */ int imsm_reshape_blocks_arrays_changes(struct intel_super *super) { int rv = 0; struct intel_dev *i_dev; struct imsm_dev *dev; /* check whole container */ for (i_dev = super->devlist; i_dev; i_dev = i_dev->next) { dev = i_dev->dev; if (is_gen_migration(dev)) { /* No repair during any migration in container */ rv = 1; break; } } return rv; } static unsigned long long imsm_component_size_aligment_check(int level, int chunk_size, unsigned long long component_size) { unsigned int component_size_alligment; /* check component size aligment */ component_size_alligment = component_size % (chunk_size/512); dprintf("imsm_component_size_aligment_check(Level: %i, " "chunk_size = %i, component_size = %llu), " "component_size_alligment = %u\n", level, chunk_size, component_size, component_size_alligment); if (component_size_alligment && (level != 1) && (level != UnSet)) { dprintf("imsm: reported component size alligned from %llu ", component_size); component_size -= component_size_alligment; dprintf("to %llu (%i).\n", component_size, component_size_alligment); } return component_size; } static void getinfo_super_imsm_volume(struct supertype *st, struct mdinfo *info, char *dmap) { struct intel_super *super = st->sb; struct migr_record *migr_rec = super->migr_rec; struct imsm_dev *dev = get_imsm_dev(super, super->current_vol); struct imsm_map *map = get_imsm_map(dev, MAP_0); struct imsm_map *prev_map = get_imsm_map(dev, MAP_1); struct imsm_map *map_to_analyse = map; struct dl *dl; int map_disks = info->array.raid_disks; memset(info, 0, sizeof(*info)); if (prev_map) map_to_analyse = prev_map; dl = super->current_disk; info->container_member = super->current_vol; info->array.raid_disks = map->num_members; info->array.level = get_imsm_raid_level(map_to_analyse); info->array.layout = imsm_level_to_layout(info->array.level); info->array.md_minor = -1; info->array.ctime = 0; info->array.utime = 0; info->array.chunk_size = __le16_to_cpu(map_to_analyse->blocks_per_strip) << 9; info->array.state = !dev->vol.dirty; info->custom_array_size = __le32_to_cpu(dev->size_high); info->custom_array_size <<= 32; info->custom_array_size |= __le32_to_cpu(dev->size_low); info->recovery_blocked = imsm_reshape_blocks_arrays_changes(st->sb); if (is_gen_migration(dev)) { info->reshape_active = 1; info->new_level = get_imsm_raid_level(map); info->new_layout = imsm_level_to_layout(info->new_level); info->new_chunk = __le16_to_cpu(map->blocks_per_strip) << 9; info->delta_disks = map->num_members - prev_map->num_members; if (info->delta_disks) { /* this needs to be applied to every array * in the container. */ info->reshape_active = CONTAINER_RESHAPE; } /* We shape information that we give to md might have to be * modify to cope with md's requirement for reshaping arrays. * For example, when reshaping a RAID0, md requires it to be * presented as a degraded RAID4. * Also if a RAID0 is migrating to a RAID5 we need to specify * the array as already being RAID5, but the 'before' layout * is a RAID4-like layout. */ switch (info->array.level) { case 0: switch(info->new_level) { case 0: /* conversion is happening as RAID4 */ info->array.level = 4; info->array.raid_disks += 1; break; case 5: /* conversion is happening as RAID5 */ info->array.level = 5; info->array.layout = ALGORITHM_PARITY_N; info->delta_disks -= 1; break; default: /* FIXME error message */ info->array.level = UnSet; break; } break; } } else { info->new_level = UnSet; info->new_layout = UnSet; info->new_chunk = info->array.chunk_size; info->delta_disks = 0; } if (dl) { info->disk.major = dl->major; info->disk.minor = dl->minor; info->disk.number = dl->index; info->disk.raid_disk = get_imsm_disk_slot(map_to_analyse, dl->index); } info->data_offset = pba_of_lba0(map_to_analyse); info->component_size = blocks_per_member(map_to_analyse); info->component_size = imsm_component_size_aligment_check( info->array.level, info->array.chunk_size, info->component_size); memset(info->uuid, 0, sizeof(info->uuid)); info->recovery_start = MaxSector; info->reshape_progress = 0; info->resync_start = MaxSector; if ((map_to_analyse->map_state == IMSM_T_STATE_UNINITIALIZED || dev->vol.dirty) && imsm_reshape_blocks_arrays_changes(super) == 0) { info->resync_start = 0; } if (dev->vol.migr_state) { switch (migr_type(dev)) { case MIGR_REPAIR: case MIGR_INIT: { __u64 blocks_per_unit = blocks_per_migr_unit(super, dev); __u64 units = __le32_to_cpu(dev->vol.curr_migr_unit); info->resync_start = blocks_per_unit * units; break; } case MIGR_GEN_MIGR: { __u64 blocks_per_unit = blocks_per_migr_unit(super, dev); __u64 units = __le32_to_cpu(migr_rec->curr_migr_unit); unsigned long long array_blocks; int used_disks; if (__le32_to_cpu(migr_rec->ascending_migr) && (units < (__le32_to_cpu(migr_rec->num_migr_units)-1)) && (super->migr_rec->rec_status == __cpu_to_le32(UNIT_SRC_IN_CP_AREA))) units++; info->reshape_progress = blocks_per_unit * units; dprintf("IMSM: General Migration checkpoint : %llu " "(%llu) -> read reshape progress : %llu\n", (unsigned long long)units, (unsigned long long)blocks_per_unit, info->reshape_progress); used_disks = imsm_num_data_members(dev, MAP_1); if (used_disks > 0) { array_blocks = blocks_per_member(map) * used_disks; /* round array size down to closest MB */ info->custom_array_size = (array_blocks >> SECT_PER_MB_SHIFT) << SECT_PER_MB_SHIFT; } } case MIGR_VERIFY: /* we could emulate the checkpointing of * 'sync_action=check' migrations, but for now * we just immediately complete them */ case MIGR_REBUILD: /* this is handled by container_content_imsm() */ case MIGR_STATE_CHANGE: /* FIXME handle other migrations */ default: /* we are not dirty, so... */ info->resync_start = MaxSector; } } strncpy(info->name, (char *) dev->volume, MAX_RAID_SERIAL_LEN); info->name[MAX_RAID_SERIAL_LEN] = 0; info->array.major_version = -1; info->array.minor_version = -2; sprintf(info->text_version, "/%s/%d", st->container_devnm, info->container_member); info->safe_mode_delay = 4000; /* 4 secs like the Matrix driver */ uuid_from_super_imsm(st, info->uuid); if (dmap) { int i, j; for (i=0; i<map_disks; i++) { dmap[i] = 0; if (i < info->array.raid_disks) { struct imsm_disk *dsk; j = get_imsm_disk_idx(dev, i, MAP_X); dsk = get_imsm_disk(super, j); if (dsk && (dsk->status & CONFIGURED_DISK)) dmap[i] = 1; } } } } static __u8 imsm_check_degraded(struct intel_super *super, struct imsm_dev *dev, int failed, int look_in_map); static int imsm_count_failed(struct intel_super *super, struct imsm_dev *dev, int look_in_map); #ifndef MDASSEMBLE static void manage_second_map(struct intel_super *super, struct imsm_dev *dev) { if (is_gen_migration(dev)) { int failed; __u8 map_state; struct imsm_map *map2 = get_imsm_map(dev, MAP_1); failed = imsm_count_failed(super, dev, MAP_1); map_state = imsm_check_degraded(super, dev, failed, MAP_1); if (map2->map_state != map_state) { map2->map_state = map_state; super->updates_pending++; } } } #endif static struct imsm_disk *get_imsm_missing(struct intel_super *super, __u8 index) { struct dl *d; for (d = super->missing; d; d = d->next) if (d->index == index) return &d->disk; return NULL; } static void getinfo_super_imsm(struct supertype *st, struct mdinfo *info, char *map) { struct intel_super *super = st->sb; struct imsm_disk *disk; int map_disks = info->array.raid_disks; int max_enough = -1; int i; struct imsm_super *mpb; if (super->current_vol >= 0) { getinfo_super_imsm_volume(st, info, map); return; } memset(info, 0, sizeof(*info)); /* Set raid_disks to zero so that Assemble will always pull in valid * spares */ info->array.raid_disks = 0; info->array.level = LEVEL_CONTAINER; info->array.layout = 0; info->array.md_minor = -1; info->array.ctime = 0; /* N/A for imsm */ info->array.utime = 0; info->array.chunk_size = 0; info->disk.major = 0; info->disk.minor = 0; info->disk.raid_disk = -1; info->reshape_active = 0; info->array.major_version = -1; info->array.minor_version = -2; strcpy(info->text_version, "imsm"); info->safe_mode_delay = 0; info->disk.number = -1; info->disk.state = 0; info->name[0] = 0; info->recovery_start = MaxSector; info->recovery_blocked = imsm_reshape_blocks_arrays_changes(st->sb); /* do we have the all the insync disks that we expect? */ mpb = super->anchor; for (i = 0; i < mpb->num_raid_devs; i++) { struct imsm_dev *dev = get_imsm_dev(super, i); int failed, enough, j, missing = 0; struct imsm_map *map; __u8 state; failed = imsm_count_failed(super, dev, MAP_0); state = imsm_check_degraded(super, dev, failed, MAP_0); map = get_imsm_map(dev, MAP_0); /* any newly missing disks? * (catches single-degraded vs double-degraded) */ for (j = 0; j < map->num_members; j++) { __u32 ord = get_imsm_ord_tbl_ent(dev, j, MAP_0); __u32 idx = ord_to_idx(ord); if (!(ord & IMSM_ORD_REBUILD) && get_imsm_missing(super, idx)) { missing = 1; break; } } if (state == IMSM_T_STATE_FAILED) enough = -1; else if (state == IMSM_T_STATE_DEGRADED && (state != map->map_state || missing)) enough = 0; else /* we're normal, or already degraded */ enough = 1; if (is_gen_migration(dev) && missing) { /* during general migration we need all disks * that process is running on. * No new missing disk is allowed. */ max_enough = -1; enough = -1; /* no more checks necessary */ break; } /* in the missing/failed disk case check to see * if at least one array is runnable */ max_enough = max(max_enough, enough); } dprintf("%s: enough: %d\n", __func__, max_enough); info->container_enough = max_enough; if (super->disks) { __u32 reserved = imsm_reserved_sectors(super, super->disks); disk = &super->disks->disk; info->data_offset = total_blocks(&super->disks->disk) - reserved; info->component_size = reserved; info->disk.state = is_configured(disk) ? (1 << MD_DISK_ACTIVE) : 0; /* we don't change info->disk.raid_disk here because * this state will be finalized in mdmon after we have * found the 'most fresh' version of the metadata */ info->disk.state |= is_failed(disk) ? (1 << MD_DISK_FAULTY) : 0; info->disk.state |= is_spare(disk) ? 0 : (1 << MD_DISK_SYNC); } /* only call uuid_from_super_imsm when this disk is part of a populated container, * ->compare_super may have updated the 'num_raid_devs' field for spares */ if (info->disk.state & (1 << MD_DISK_SYNC) || super->anchor->num_raid_devs) uuid_from_super_imsm(st, info->uuid); else memcpy(info->uuid, uuid_zero, sizeof(uuid_zero)); /* I don't know how to compute 'map' on imsm, so use safe default */ if (map) { int i; for (i = 0; i < map_disks; i++) map[i] = 1; } } /* allocates memory and fills disk in mdinfo structure * for each disk in array */ struct mdinfo *getinfo_super_disks_imsm(struct supertype *st) { struct mdinfo *mddev = NULL; struct intel_super *super = st->sb; struct imsm_disk *disk; int count = 0; struct dl *dl; if (!super || !super->disks) return NULL; dl = super->disks; mddev = xcalloc(1, sizeof(*mddev)); while (dl) { struct mdinfo *tmp; disk = &dl->disk; tmp = xcalloc(1, sizeof(*tmp)); if (mddev->devs) tmp->next = mddev->devs; mddev->devs = tmp; tmp->disk.number = count++; tmp->disk.major = dl->major; tmp->disk.minor = dl->minor; tmp->disk.state = is_configured(disk) ? (1 << MD_DISK_ACTIVE) : 0; tmp->disk.state |= is_failed(disk) ? (1 << MD_DISK_FAULTY) : 0; tmp->disk.state |= is_spare(disk) ? 0 : (1 << MD_DISK_SYNC); tmp->disk.raid_disk = -1; dl = dl->next; } return mddev; } static int update_super_imsm(struct supertype *st, struct mdinfo *info, char *update, char *devname, int verbose, int uuid_set, char *homehost) { /* For 'assemble' and 'force' we need to return non-zero if any * change was made. For others, the return value is ignored. * Update options are: * force-one : This device looks a bit old but needs to be included, * update age info appropriately. * assemble: clear any 'faulty' flag to allow this device to * be assembled. * force-array: Array is degraded but being forced, mark it clean * if that will be needed to assemble it. * * newdev: not used ???? * grow: Array has gained a new device - this is currently for * linear only * resync: mark as dirty so a resync will happen. * name: update the name - preserving the homehost * uuid: Change the uuid of the array to match watch is given * * Following are not relevant for this imsm: * sparc2.2 : update from old dodgey metadata * super-minor: change the preferred_minor number * summaries: update redundant counters. * homehost: update the recorded homehost * _reshape_progress: record new reshape_progress position. */ int rv = 1; struct intel_super *super = st->sb; struct imsm_super *mpb; /* we can only update container info */ if (!super || super->current_vol >= 0 || !super->anchor) return 1; mpb = super->anchor; if (strcmp(update, "uuid") == 0) { /* We take this to mean that the family_num should be updated. * However that is much smaller than the uuid so we cannot really * allow an explicit uuid to be given. And it is hard to reliably * know if one was. * So if !uuid_set we know the current uuid is random and just used * the first 'int' and copy it to the other 3 positions. * Otherwise we require the 4 'int's to be the same as would be the * case if we are using a random uuid. So an explicit uuid will be * accepted as long as all for ints are the same... which shouldn't hurt */ if (!uuid_set) { info->uuid[1] = info->uuid[2] = info->uuid[3] = info->uuid[0]; rv = 0; } else { if (info->uuid[0] != info->uuid[1] || info->uuid[1] != info->uuid[2] || info->uuid[2] != info->uuid[3]) rv = -1; else rv = 0; } if (rv == 0) mpb->orig_family_num = info->uuid[0]; } else if (strcmp(update, "assemble") == 0) rv = 0; else rv = -1; /* successful update? recompute checksum */ if (rv == 0) mpb->check_sum = __le32_to_cpu(__gen_imsm_checksum(mpb)); return rv; } static size_t disks_to_mpb_size(int disks) { size_t size; size = sizeof(struct imsm_super); size += (disks - 1) * sizeof(struct imsm_disk); size += 2 * sizeof(struct imsm_dev); /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */ size += (4 - 2) * sizeof(struct imsm_map); /* 4 possible disk_ord_tbl's */ size += 4 * (disks - 1) * sizeof(__u32); return size; } static __u64 avail_size_imsm(struct supertype *st, __u64 devsize, unsigned long long data_offset) { if (devsize < (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS)) return 0; return devsize - (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS); } static void free_devlist(struct intel_super *super) { struct intel_dev *dv; while (super->devlist) { dv = super->devlist->next; free(super->devlist->dev); free(super->devlist); super->devlist = dv; } } static void imsm_copy_dev(struct imsm_dev *dest, struct imsm_dev *src) { memcpy(dest, src, sizeof_imsm_dev(src, 0)); } static int compare_super_imsm(struct supertype *st, struct supertype *tst) { /* * return: * 0 same, or first was empty, and second was copied * 1 second had wrong number * 2 wrong uuid * 3 wrong other info */ struct intel_super *first = st->sb; struct intel_super *sec = tst->sb; if (!first) { st->sb = tst->sb; tst->sb = NULL; return 0; } /* in platform dependent environment test if the disks * use the same Intel hba * If not on Intel hba at all, allow anything. */ if (!check_env("IMSM_NO_PLATFORM")) { if (first->hba && sec->hba && strcmp(first->hba->path, sec->hba->path) != 0) { fprintf(stderr, "HBAs of devices does not match %s != %s\n", first->hba ? first->hba->path : NULL, sec->hba ? sec->hba->path : NULL); return 3; } } /* if an anchor does not have num_raid_devs set then it is a free * floating spare */ if (first->anchor->num_raid_devs > 0 && sec->anchor->num_raid_devs > 0) { /* Determine if these disks might ever have been * related. Further disambiguation can only take place * in load_super_imsm_all */ __u32 first_family = first->anchor->orig_family_num; __u32 sec_family = sec->anchor->orig_family_num; if (memcmp(first->anchor->sig, sec->anchor->sig, MAX_SIGNATURE_LENGTH) != 0) return 3; if (first_family == 0) first_family = first->anchor->family_num; if (sec_family == 0) sec_family = sec->anchor->family_num; if (first_family != sec_family) return 3; } /* if 'first' is a spare promote it to a populated mpb with sec's * family number */ if (first->anchor->num_raid_devs == 0 && sec->anchor->num_raid_devs > 0) { int i; struct intel_dev *dv; struct imsm_dev *dev; /* we need to copy raid device info from sec if an allocation * fails here we don't associate the spare */ for (i = 0; i < sec->anchor->num_raid_devs; i++) { dv = xmalloc(sizeof(*dv)); dev = xmalloc(sizeof_imsm_dev(get_imsm_dev(sec, i), 1)); dv->dev = dev; dv->index = i; dv->next = first->devlist; first->devlist = dv; } if (i < sec->anchor->num_raid_devs) { /* allocation failure */ free_devlist(first); pr_err("imsm: failed to associate spare\n"); return 3; } first->anchor->num_raid_devs = sec->anchor->num_raid_devs; first->anchor->orig_family_num = sec->anchor->orig_family_num; first->anchor->family_num = sec->anchor->family_num; memcpy(first->anchor->sig, sec->anchor->sig, MAX_SIGNATURE_LENGTH); for (i = 0; i < sec->anchor->num_raid_devs; i++) imsm_copy_dev(get_imsm_dev(first, i), get_imsm_dev(sec, i)); } return 0; } static void fd2devname(int fd, char *name) { struct stat st; char path[256]; char dname[PATH_MAX]; char *nm; int rv; name[0] = '\0'; if (fstat(fd, &st) != 0) return; sprintf(path, "/sys/dev/block/%d:%d", major(st.st_rdev), minor(st.st_rdev)); rv = readlink(path, dname, sizeof(dname)-1); if (rv <= 0) return; dname[rv] = '\0'; nm = strrchr(dname, '/'); if (nm) { nm++; snprintf(name, MAX_RAID_SERIAL_LEN, "/dev/%s", nm); } } extern int scsi_get_serial(int fd, void *buf, size_t buf_len); static int imsm_read_serial(int fd, char *devname, __u8 serial[MAX_RAID_SERIAL_LEN]) { unsigned char scsi_serial[255]; int rv; int rsp_len; int len; char *dest; char *src; char *rsp_buf; int i; memset(scsi_serial, 0, sizeof(scsi_serial)); rv = scsi_get_serial(fd, scsi_serial, sizeof(scsi_serial)); if (rv && check_env("IMSM_DEVNAME_AS_SERIAL")) { memset(serial, 0, MAX_RAID_SERIAL_LEN); fd2devname(fd, (char *) serial); return 0; } if (rv != 0) { if (devname) pr_err("Failed to retrieve serial for %s\n", devname); return rv; } rsp_len = scsi_serial[3]; if (!rsp_len) { if (devname) pr_err("Failed to retrieve serial for %s\n", devname); return 2; } rsp_buf = (char *) &scsi_serial[4]; /* trim all whitespace and non-printable characters and convert * ':' to ';' */ for (i = 0, dest = rsp_buf; i < rsp_len; i++) { src = &rsp_buf[i]; if (*src > 0x20) { /* ':' is reserved for use in placeholder serial * numbers for missing disks */ if (*src == ':') *dest++ = ';'; else *dest++ = *src; } } len = dest - rsp_buf; dest = rsp_buf; /* truncate leading characters */ if (len > MAX_RAID_SERIAL_LEN) { dest += len - MAX_RAID_SERIAL_LEN; len = MAX_RAID_SERIAL_LEN; } memset(serial, 0, MAX_RAID_SERIAL_LEN); memcpy(serial, dest, len); return 0; } static int serialcmp(__u8 *s1, __u8 *s2) { return strncmp((char *) s1, (char *) s2, MAX_RAID_SERIAL_LEN); } static void serialcpy(__u8 *dest, __u8 *src) { strncpy((char *) dest, (char *) src, MAX_RAID_SERIAL_LEN); } static struct dl *serial_to_dl(__u8 *serial, struct intel_super *super) { struct dl *dl; for (dl = super->disks; dl; dl = dl->next) if (serialcmp(dl->serial, serial) == 0) break; return dl; } static struct imsm_disk * __serial_to_disk(__u8 *serial, struct imsm_super *mpb, int *idx) { int i; for (i = 0; i < mpb->num_disks; i++) { struct imsm_disk *disk = __get_imsm_disk(mpb, i); if (serialcmp(disk->serial, serial) == 0) { if (idx) *idx = i; return disk; } } return NULL; } static int load_imsm_disk(int fd, struct intel_super *super, char *devname, int keep_fd) { struct imsm_disk *disk; struct dl *dl; struct stat stb; int rv; char name[40]; __u8 serial[MAX_RAID_SERIAL_LEN]; rv = imsm_read_serial(fd, devname, serial); if (rv != 0) return 2; dl = xcalloc(1, sizeof(*dl)); fstat(fd, &stb); dl->major = major(stb.st_rdev); dl->minor = minor(stb.st_rdev); dl->next = super->disks; dl->fd = keep_fd ? fd : -1; assert(super->disks == NULL); super->disks = dl; serialcpy(dl->serial, serial); dl->index = -2; dl->e = NULL; fd2devname(fd, name); if (devname) dl->devname = xstrdup(devname); else dl->devname = xstrdup(name); /* look up this disk's index in the current anchor */ disk = __serial_to_disk(dl->serial, super->anchor, &dl->index); if (disk) { dl->disk = *disk; /* only set index on disks that are a member of a * populated contianer, i.e. one with raid_devs */ if (is_failed(&dl->disk)) dl->index = -2; else if (is_spare(&dl->disk)) dl->index = -1; } return 0; } #ifndef MDASSEMBLE /* When migrating map0 contains the 'destination' state while map1 * contains the current state. When not migrating map0 contains the * current state. This routine assumes that map[0].map_state is set to * the current array state before being called. * * Migration is indicated by one of the following states * 1/ Idle (migr_state=0 map0state=normal||unitialized||degraded||failed) * 2/ Initialize (migr_state=1 migr_type=MIGR_INIT map0state=normal * map1state=unitialized) * 3/ Repair (Resync) (migr_state=1 migr_type=MIGR_REPAIR map0state=normal * map1state=normal) * 4/ Rebuild (migr_state=1 migr_type=MIGR_REBUILD map0state=normal * map1state=degraded) * 5/ Migration (mig_state=1 migr_type=MIGR_GEN_MIGR map0state=normal * map1state=normal) */ static void migrate(struct imsm_dev *dev, struct intel_super *super, __u8 to_state, int migr_type) { struct imsm_map *dest; struct imsm_map *src = get_imsm_map(dev, MAP_0); dev->vol.migr_state = 1; set_migr_type(dev, migr_type); dev->vol.curr_migr_unit = 0; dest = get_imsm_map(dev, MAP_1); /* duplicate and then set the target end state in map[0] */ memcpy(dest, src, sizeof_imsm_map(src)); if ((migr_type == MIGR_REBUILD) || (migr_type == MIGR_GEN_MIGR)) { __u32 ord; int i; for (i = 0; i < src->num_members; i++) { ord = __le32_to_cpu(src->disk_ord_tbl[i]); set_imsm_ord_tbl_ent(src, i, ord_to_idx(ord)); } } if (migr_type == MIGR_GEN_MIGR) /* Clear migration record */ memset(super->migr_rec, 0, sizeof(struct migr_record)); src->map_state = to_state; } static void end_migration(struct imsm_dev *dev, struct intel_super *super, __u8 map_state) { struct imsm_map *map = get_imsm_map(dev, MAP_0); struct imsm_map *prev = get_imsm_map(dev, dev->vol.migr_state == 0 ? MAP_0 : MAP_1); int i, j; /* merge any IMSM_ORD_REBUILD bits that were not successfully * completed in the last migration. * * FIXME add support for raid-level-migration */ if ((map_state != map->map_state) && (is_gen_migration(dev) == 0) && (prev->map_state != IMSM_T_STATE_UNINITIALIZED)) { /* when final map state is other than expected * merge maps (not for migration) */ int failed; for (i = 0; i < prev->num_members; i++) for (j = 0; j < map->num_members; j++) /* during online capacity expansion * disks position can be changed * if takeover is used */ if (ord_to_idx(map->disk_ord_tbl[j]) == ord_to_idx(prev->disk_ord_tbl[i])) { map->disk_ord_tbl[j] |= prev->disk_ord_tbl[i]; break; } failed = imsm_count_failed(super, dev, MAP_0); map_state = imsm_check_degraded(super, dev, failed, MAP_0); } dev->vol.migr_state = 0; set_migr_type(dev, 0); dev->vol.curr_migr_unit = 0; map->map_state = map_state; } #endif static int parse_raid_devices(struct intel_super *super) { int i; struct imsm_dev *dev_new; size_t len, len_migr; size_t max_len = 0; size_t space_needed = 0; struct imsm_super *mpb = super->anchor; for (i = 0; i < super->anchor->num_raid_devs; i++) { struct imsm_dev *dev_iter = __get_imsm_dev(super->anchor, i); struct intel_dev *dv; len = sizeof_imsm_dev(dev_iter, 0); len_migr = sizeof_imsm_dev(dev_iter, 1); if (len_migr > len) space_needed += len_migr - len; dv = xmalloc(sizeof(*dv)); if (max_len < len_migr) max_len = len_migr; if (max_len > len_migr) space_needed += max_len - len_migr; dev_new = xmalloc(max_len); imsm_copy_dev(dev_new, dev_iter); dv->dev = dev_new; dv->index = i; dv->next = super->devlist; super->devlist = dv; } /* ensure that super->buf is large enough when all raid devices * are migrating */ if (__le32_to_cpu(mpb->mpb_size) + space_needed > super->len) { void *buf; len = ROUND_UP(__le32_to_cpu(mpb->mpb_size) + space_needed, 512); if (posix_memalign(&buf, 512, len) != 0) return 1; memcpy(buf, super->buf, super->len); memset(buf + super->len, 0, len - super->len); free(super->buf); super->buf = buf; super->len = len; } return 0; } /* retrieve a pointer to the bbm log which starts after all raid devices */ struct bbm_log *__get_imsm_bbm_log(struct imsm_super *mpb) { void *ptr = NULL; if (__le32_to_cpu(mpb->bbm_log_size)) { ptr = mpb; ptr += mpb->mpb_size - __le32_to_cpu(mpb->bbm_log_size); } return ptr; } /******************************************************************************* * Function: check_mpb_migr_compatibility * Description: Function checks for unsupported migration features: * - migration optimization area (pba_of_lba0) * - descending reshape (ascending_migr) * Parameters: * super : imsm metadata information * Returns: * 0 : migration is compatible * -1 : migration is not compatible ******************************************************************************/ int check_mpb_migr_compatibility(struct intel_super *super) { struct imsm_map *map0, *map1; struct migr_record *migr_rec = super->migr_rec; int i; for (i = 0; i < super->anchor->num_raid_devs; i++) { struct imsm_dev *dev_iter = __get_imsm_dev(super->anchor, i); if (dev_iter && dev_iter->vol.migr_state == 1 && dev_iter->vol.migr_type == MIGR_GEN_MIGR) { /* This device is migrating */ map0 = get_imsm_map(dev_iter, MAP_0); map1 = get_imsm_map(dev_iter, MAP_1); if (pba_of_lba0(map0) != pba_of_lba0(map1)) /* migration optimization area was used */ return -1; if (migr_rec->ascending_migr == 0 && migr_rec->dest_depth_per_unit > 0) /* descending reshape not supported yet */ return -1; } } return 0; } static void __free_imsm(struct intel_super *super, int free_disks); /* load_imsm_mpb - read matrix metadata * allocates super->mpb to be freed by free_imsm */ static int load_imsm_mpb(int fd, struct intel_super *super, char *devname) { unsigned long long dsize; unsigned long long sectors; struct stat; struct imsm_super *anchor; __u32 check_sum; get_dev_size(fd, NULL, &dsize); if (dsize < 1024) { if (devname) pr_err("%s: device to small for imsm\n", devname); return 1; } if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0) { if (devname) pr_err("Cannot seek to anchor block on %s: %s\n", devname, strerror(errno)); return 1; } if (posix_memalign((void**)&anchor, 512, 512) != 0) { if (devname) pr_err("Failed to allocate imsm anchor buffer" " on %s\n", devname); return 1; } if (read(fd, anchor, 512) != 512) { if (devname) pr_err("Cannot read anchor block on %s: %s\n", devname, strerror(errno)); free(anchor); return 1; } if (strncmp((char *) anchor->sig, MPB_SIGNATURE, MPB_SIG_LEN) != 0) { if (devname) pr_err("no IMSM anchor on %s\n", devname); free(anchor); return 2; } __free_imsm(super, 0); /* reload capability and hba */ /* capability and hba must be updated with new super allocation */ find_intel_hba_capability(fd, super, devname); super->len = ROUND_UP(anchor->mpb_size, 512); if (posix_memalign(&super->buf, 512, super->len) != 0) { if (devname) pr_err("unable to allocate %zu byte mpb buffer\n", super->len); free(anchor); return 2; } memcpy(super->buf, anchor, 512); sectors = mpb_sectors(anchor) - 1; free(anchor); if (posix_memalign(&super->migr_rec_buf, 512, MIGR_REC_BUF_SIZE) != 0) { pr_err("%s could not allocate migr_rec buffer\n", __func__); free(super->buf); return 2; } super->clean_migration_record_by_mdmon = 0; if (!sectors) { check_sum = __gen_imsm_checksum(super->anchor); if (check_sum != __le32_to_cpu(super->anchor->check_sum)) { if (devname) pr_err("IMSM checksum %x != %x on %s\n", check_sum, __le32_to_cpu(super->anchor->check_sum), devname); return 2; } return 0; } /* read the extended mpb */ if (lseek64(fd, dsize - (512 * (2 + sectors)), SEEK_SET) < 0) { if (devname) pr_err("Cannot seek to extended mpb on %s: %s\n", devname, strerror(errno)); return 1; } if ((unsigned)read(fd, super->buf + 512, super->len - 512) != super->len - 512) { if (devname) pr_err("Cannot read extended mpb on %s: %s\n", devname, strerror(errno)); return 2; } check_sum = __gen_imsm_checksum(super->anchor); if (check_sum != __le32_to_cpu(super->anchor->check_sum)) { if (devname) pr_err("IMSM checksum %x != %x on %s\n", check_sum, __le32_to_cpu(super->anchor->check_sum), devname); return 3; } /* FIXME the BBM log is disk specific so we cannot use this global * buffer for all disks. Ok for now since we only look at the global * bbm_log_size parameter to gate assembly */ super->bbm_log = __get_imsm_bbm_log(super->anchor); return 0; } static int read_imsm_migr_rec(int fd, struct intel_super *super); /* clears hi bits in metadata if MPB_ATTRIB_2TB_DISK not set */ static void clear_hi(struct intel_super *super) { struct imsm_super *mpb = super->anchor; int i, n; if (mpb->attributes & MPB_ATTRIB_2TB_DISK) return; for (i = 0; i < mpb->num_disks; ++i) { struct imsm_disk *disk = &mpb->disk[i]; disk->total_blocks_hi = 0; } for (i = 0; i < mpb->num_raid_devs; ++i) { struct imsm_dev *dev = get_imsm_dev(super, i); if (!dev) return; for (n = 0; n < 2; ++n) { struct imsm_map *map = get_imsm_map(dev, n); if (!map) continue; map->pba_of_lba0_hi = 0; map->blocks_per_member_hi = 0; map->num_data_stripes_hi = 0; } } } static int load_and_parse_mpb(int fd, struct intel_super *super, char *devname, int keep_fd) { int err; err = load_imsm_mpb(fd, super, devname); if (err) return err; err = load_imsm_disk(fd, super, devname, keep_fd); if (err) return err; err = parse_raid_devices(super); clear_hi(super); return err; } static void __free_imsm_disk(struct dl *d) { if (d->fd >= 0) close(d->fd); if (d->devname) free(d->devname); if (d->e) free(d->e); free(d); } static void free_imsm_disks(struct intel_super *super) { struct dl *d; while (super->disks) { d = super->disks; super->disks = d->next; __free_imsm_disk(d); } while (super->disk_mgmt_list) { d = super->disk_mgmt_list; super->disk_mgmt_list = d->next; __free_imsm_disk(d); } while (super->missing) { d = super->missing; super->missing = d->next; __free_imsm_disk(d); } } /* free all the pieces hanging off of a super pointer */ static void __free_imsm(struct intel_super *super, int free_disks) { struct intel_hba *elem, *next; if (super->buf) { free(super->buf); super->buf = NULL; } /* unlink capability description */ super->orom = NULL; if (super->migr_rec_buf) { free(super->migr_rec_buf); super->migr_rec_buf = NULL; } if (free_disks) free_imsm_disks(super); free_devlist(super); elem = super->hba; while (elem) { if (elem->path) free((void *)elem->path); next = elem->next; free(elem); elem = next; } super->hba = NULL; } static void free_imsm(struct intel_super *super) { __free_imsm(super, 1); free(super); } static void free_super_imsm(struct supertype *st) { struct intel_super *super = st->sb; if (!super) return; free_imsm(super); st->sb = NULL; } static struct intel_super *alloc_super(void) { struct intel_super *super = xcalloc(1, sizeof(*super)); super->current_vol = -1; super->create_offset = ~((unsigned long long) 0); return super; } /* * find and allocate hba and OROM/EFI based on valid fd of RAID component device */ static int find_intel_hba_capability(int fd, struct intel_super *super, char *devname) { struct sys_dev *hba_name; int rv = 0; if ((fd < 0) || check_env("IMSM_NO_PLATFORM")) { super->orom = NULL; super->hba = NULL; return 0; } hba_name = find_disk_attached_hba(fd, NULL); if (!hba_name) { if (devname) pr_err("%s is not attached to Intel(R) RAID controller.\n", devname); return 1; } rv = attach_hba_to_super(super, hba_name); if (rv == 2) { if (devname) { struct intel_hba *hba = super->hba; pr_err("%s is attached to Intel(R) %s RAID " "controller (%s),\n" " but the container is assigned to Intel(R) " "%s RAID controller (", devname, hba_name->path, hba_name->pci_id ? : "Err!", get_sys_dev_type(hba_name->type)); while (hba) { fprintf(stderr, "%s", hba->pci_id ? : "Err!"); if (hba->next) fprintf(stderr, ", "); hba = hba->next; } fprintf(stderr, ").\n"); cont_err("Mixing devices attached to multiple controllers " "is not allowed.\n"); } return 2; } super->orom = find_imsm_capability(hba_name->type); if (!super->orom) return 3; return 0; } /* find_missing - helper routine for load_super_imsm_all that identifies * disks that have disappeared from the system. This routine relies on * the mpb being uptodate, which it is at load time. */ static int find_missing(struct intel_super *super) { int i; struct imsm_super *mpb = super->anchor; struct dl *dl; struct imsm_disk *disk; for (i = 0; i < mpb->num_disks; i++) { disk = __get_imsm_disk(mpb, i); dl = serial_to_dl(disk->serial, super); if (dl) continue; dl = xmalloc(sizeof(*dl)); dl->major = 0; dl->minor = 0; dl->fd = -1; dl->devname = xstrdup("missing"); dl->index = i; serialcpy(dl->serial, disk->serial); dl->disk = *disk; dl->e = NULL; dl->next = super->missing; super->missing = dl; } return 0; } #ifndef MDASSEMBLE static struct intel_disk *disk_list_get(__u8 *serial, struct intel_disk *disk_list) { struct intel_disk *idisk = disk_list; while (idisk) { if (serialcmp(idisk->disk.serial, serial) == 0) break; idisk = idisk->next; } return idisk; } static int __prep_thunderdome(struct intel_super **table, int tbl_size, struct intel_super *super, struct intel_disk **disk_list) { struct imsm_disk *d = &super->disks->disk; struct imsm_super *mpb = super->anchor; int i, j; for (i = 0; i < tbl_size; i++) { struct imsm_super *tbl_mpb = table[i]->anchor; struct imsm_disk *tbl_d = &table[i]->disks->disk; if (tbl_mpb->family_num == mpb->family_num) { if (tbl_mpb->check_sum == mpb->check_sum) { dprintf("%s: mpb from %d:%d matches %d:%d\n", __func__, super->disks->major, super->disks->minor, table[i]->disks->major, table[i]->disks->minor); break; } if (((is_configured(d) && !is_configured(tbl_d)) || is_configured(d) == is_configured(tbl_d)) && tbl_mpb->generation_num < mpb->generation_num) { /* current version of the mpb is a * better candidate than the one in * super_table, but copy over "cross * generational" status */ struct intel_disk *idisk; dprintf("%s: mpb from %d:%d replaces %d:%d\n", __func__, super->disks->major, super->disks->minor, table[i]->disks->major, table[i]->disks->minor); idisk = disk_list_get(tbl_d->serial, *disk_list); if (idisk && is_failed(&idisk->disk)) tbl_d->status |= FAILED_DISK; break; } else { struct intel_disk *idisk; struct imsm_disk *disk; /* tbl_mpb is more up to date, but copy * over cross generational status before * returning */ disk = __serial_to_disk(d->serial, mpb, NULL); if (disk && is_failed(disk)) d->status |= FAILED_DISK; idisk = disk_list_get(d->serial, *disk_list); if (idisk) { idisk->owner = i; if (disk && is_configured(disk)) idisk->disk.status |= CONFIGURED_DISK; } dprintf("%s: mpb from %d:%d prefer %d:%d\n", __func__, super->disks->major, super->disks->minor, table[i]->disks->major, table[i]->disks->minor); return tbl_size; } } } if (i >= tbl_size) table[tbl_size++] = super; else table[i] = super; /* update/extend the merged list of imsm_disk records */ for (j = 0; j < mpb->num_disks; j++) { struct imsm_disk *disk = __get_imsm_disk(mpb, j); struct intel_disk *idisk; idisk = disk_list_get(disk->serial, *disk_list); if (idisk) { idisk->disk.status |= disk->status; if (is_configured(&idisk->disk) || is_failed(&idisk->disk)) idisk->disk.status &= ~(SPARE_DISK); } else { idisk = xcalloc(1, sizeof(*idisk)); idisk->owner = IMSM_UNKNOWN_OWNER; idisk->disk = *disk; idisk->next = *disk_list; *disk_list = idisk; } if (serialcmp(idisk->disk.serial, d->serial) == 0) idisk->owner = i; } return tbl_size; } static struct intel_super * validate_members(struct intel_super *super, struct intel_disk *disk_list, const int owner) { struct imsm_super *mpb = super->anchor; int ok_count = 0; int i; for (i = 0; i < mpb->num_disks; i++) { struct imsm_disk *disk = __get_imsm_disk(mpb, i); struct intel_disk *idisk; idisk = disk_list_get(disk->serial, disk_list); if (idisk) { if (idisk->owner == owner || idisk->owner == IMSM_UNKNOWN_OWNER) ok_count++; else dprintf("%s: '%.16s' owner %d != %d\n", __func__, disk->serial, idisk->owner, owner); } else { dprintf("%s: unknown disk %x [%d]: %.16s\n", __func__, __le32_to_cpu(mpb->family_num), i, disk->serial); break; } } if (ok_count == mpb->num_disks) return super; return NULL; } static void show_conflicts(__u32 family_num, struct intel_super *super_list) { struct intel_super *s; for (s = super_list; s; s = s->next) { if (family_num != s->anchor->family_num) continue; pr_err("Conflict, offlining family %#x on '%s'\n", __le32_to_cpu(family_num), s->disks->devname); } } static struct intel_super * imsm_thunderdome(struct intel_super **super_list, int len) { struct intel_super *super_table[len]; struct intel_disk *disk_list = NULL; struct intel_super *champion, *spare; struct intel_super *s, **del; int tbl_size = 0; int conflict; int i; memset(super_table, 0, sizeof(super_table)); for (s = *super_list; s; s = s->next) tbl_size = __prep_thunderdome(super_table, tbl_size, s, &disk_list); for (i = 0; i < tbl_size; i++) { struct imsm_disk *d; struct intel_disk *idisk; struct imsm_super *mpb = super_table[i]->anchor; s = super_table[i]; d = &s->disks->disk; /* 'd' must appear in merged disk list for its * configuration to be valid */ idisk = disk_list_get(d->serial, disk_list); if (idisk && idisk->owner == i) s = validate_members(s, disk_list, i); else s = NULL; if (!s) dprintf("%s: marking family: %#x from %d:%d offline\n", __func__, mpb->family_num, super_table[i]->disks->major, super_table[i]->disks->minor); super_table[i] = s; } /* This is where the mdadm implementation differs from the Windows * driver which has no strict concept of a container. We can only * assemble one family from a container, so when returning a prodigal * array member to this system the code will not be able to disambiguate * the container contents that should be assembled ("foreign" versus * "local"). It requires user intervention to set the orig_family_num * to a new value to establish a new container. The Windows driver in * this situation fixes up the volume name in place and manages the * foreign array as an independent entity. */ s = NULL; spare = NULL; conflict = 0; for (i = 0; i < tbl_size; i++) { struct intel_super *tbl_ent = super_table[i]; int is_spare = 0; if (!tbl_ent) continue; if (tbl_ent->anchor->num_raid_devs == 0) { spare = tbl_ent; is_spare = 1; } if (s && !is_spare) { show_conflicts(tbl_ent->anchor->family_num, *super_list); conflict++; } else if (!s && !is_spare) s = tbl_ent; } if (!s) s = spare; if (!s) { champion = NULL; goto out; } champion = s; if (conflict) pr_err("Chose family %#x on '%s', " "assemble conflicts to new container with '--update=uuid'\n", __le32_to_cpu(s->anchor->family_num), s->disks->devname); /* collect all dl's onto 'champion', and update them to * champion's version of the status */ for (s = *super_list; s; s = s->next) { struct imsm_super *mpb = champion->anchor; struct dl *dl = s->disks; if (s == champion) continue; mpb->attributes |= s->anchor->attributes & MPB_ATTRIB_2TB_DISK; for (i = 0; i < mpb->num_disks; i++) { struct imsm_disk *disk; disk = __serial_to_disk(dl->serial, mpb, &dl->index); if (disk) { dl->disk = *disk; /* only set index on disks that are a member of * a populated contianer, i.e. one with * raid_devs */ if (is_failed(&dl->disk)) dl->index = -2; else if (is_spare(&dl->disk)) dl->index = -1; break; } } if (i >= mpb->num_disks) { struct intel_disk *idisk; idisk = disk_list_get(dl->serial, disk_list); if (idisk && is_spare(&idisk->disk) && !is_failed(&idisk->disk) && !is_configured(&idisk->disk)) dl->index = -1; else { dl->index = -2; continue; } } dl->next = champion->disks; champion->disks = dl; s->disks = NULL; } /* delete 'champion' from super_list */ for (del = super_list; *del; ) { if (*del == champion) { *del = (*del)->next; break; } else del = &(*del)->next; } champion->next = NULL; out: while (disk_list) { struct intel_disk *idisk = disk_list; disk_list = disk_list->next; free(idisk); } return champion; } static int get_sra_super_block(int fd, struct intel_super **super_list, char *devname, int *max, int keep_fd); static int get_super_block(struct intel_super **super_list, char *devnm, char *devname, int major, int minor, int keep_fd); static int get_devlist_super_block(struct md_list *devlist, struct intel_super **super_list, int *max, int keep_fd); static int load_super_imsm_all(struct supertype *st, int fd, void **sbp, char *devname, struct md_list *devlist, int keep_fd) { struct intel_super *super_list = NULL; struct intel_super *super = NULL; int err = 0; int i = 0; if (fd >= 0) /* 'fd' is an opened container */ err = get_sra_super_block(fd, &super_list, devname, &i, keep_fd); else /* get super block from devlist devices */ err = get_devlist_super_block(devlist, &super_list, &i, keep_fd); if (err) goto error; /* all mpbs enter, maybe one leaves */ super = imsm_thunderdome(&super_list, i); if (!super) { err = 1; goto error; } if (find_missing(super) != 0) { free_imsm(super); err = 2; goto error; } /* load migration record */ err = load_imsm_migr_rec(super, NULL); if (err == -1) { /* migration is in progress, * but migr_rec cannot be loaded, */ err = 4; goto error; } /* Check migration compatibility */ if ((err == 0) && (check_mpb_migr_compatibility(super) != 0)) { pr_err("Unsupported migration detected"); if (devname) fprintf(stderr, " on %s\n", devname); else fprintf(stderr, " (IMSM).\n"); err = 5; goto error; } err = 0; error: while (super_list) { struct intel_super *s = super_list; super_list = super_list->next; free_imsm(s); } if (err) return err; *sbp = super; if (fd >= 0) strcpy(st->container_devnm, fd2devnm(fd)); else st->container_devnm[0] = 0; if (err == 0 && st->ss == NULL) { st->ss = &super_imsm; st->minor_version = 0; st->max_devs = IMSM_MAX_DEVICES; } return 0; } static int get_devlist_super_block(struct md_list *devlist, struct intel_super **super_list, int *max, int keep_fd) { struct md_list *tmpdev; int err = 0; int i = 0; for (i = 0, tmpdev = devlist; tmpdev; tmpdev = tmpdev->next) { if (tmpdev->used != 1) continue; if (tmpdev->container == 1) { int lmax = 0; int fd = dev_open(tmpdev->devname, O_RDONLY|O_EXCL); if (fd < 0) { pr_err("cannot open device %s: %s\n", tmpdev->devname, strerror(errno)); err = 8; goto error; } err = get_sra_super_block(fd, super_list, tmpdev->devname, &lmax, keep_fd); i += lmax; close(fd); if (err) { err = 7; goto error; } } else { int major = major(tmpdev->st_rdev); int minor = minor(tmpdev->st_rdev); err = get_super_block(super_list, NULL, tmpdev->devname, major, minor, keep_fd); i++; if (err) { err = 6; goto error; } } } error: *max = i; return err; } static int get_super_block(struct intel_super **super_list, char *devnm, char *devname, int major, int minor, int keep_fd) { struct intel_super*s = NULL; char nm[32]; int dfd = -1; int err = 0; int retry; s = alloc_super(); if (!s) { err = 1; goto error; } sprintf(nm, "%d:%d", major, minor); dfd = dev_open(nm, O_RDWR); if (dfd < 0) { err = 2; goto error; } find_intel_hba_capability(dfd, s, devname); err = load_and_parse_mpb(dfd, s, NULL, keep_fd); /* retry the load if we might have raced against mdmon */ if (err == 3 && devnm && mdmon_running(devnm)) for (retry = 0; retry < 3; retry++) { usleep(3000); err = load_and_parse_mpb(dfd, s, NULL, keep_fd); if (err != 3) break; } error: if (!err) { s->next = *super_list; *super_list = s; } else { if (s) free(s); if (dfd >= 0) close(dfd); } if ((dfd >= 0) && (!keep_fd)) close(dfd); return err; } static int get_sra_super_block(int fd, struct intel_super **super_list, char *devname, int *max, int keep_fd) { struct mdinfo *sra; char *devnm; struct mdinfo *sd; int err = 0; int i = 0; sra = sysfs_read(fd, NULL, GET_LEVEL|GET_VERSION|GET_DEVS|GET_STATE); if (!sra) return 1; if (sra->array.major_version != -1 || sra->array.minor_version != -2 || strcmp(sra->text_version, "imsm") != 0) { err = 1; goto error; } /* load all mpbs */ devnm = fd2devnm(fd); for (sd = sra->devs, i = 0; sd; sd = sd->next, i++) { if (get_super_block(super_list, devnm, devname, sd->disk.major, sd->disk.minor, keep_fd) != 0) { err = 7; goto error; } } error: sysfs_free(sra); *max = i; return err; } static int load_container_imsm(struct supertype *st, int fd, char *devname) { return load_super_imsm_all(st, fd, &st->sb, devname, NULL, 1); } #endif static int load_super_imsm(struct supertype *st, int fd, char *devname) { struct intel_super *super; int rv; if (test_partition(fd)) /* IMSM not allowed on partitions */ return 1; free_super_imsm(st); super = alloc_super(); /* Load hba and capabilities if they exist. * But do not preclude loading metadata in case capabilities or hba are * non-compliant and ignore_hw_compat is set. */ rv = find_intel_hba_capability(fd, super, devname); /* no orom/efi or non-intel hba of the disk */ if ((rv != 0) && (st->ignore_hw_compat == 0)) { if (devname) pr_err("No OROM/EFI properties for %s\n", devname); free_imsm(super); return 2; } rv = load_and_parse_mpb(fd, super, devname, 0); if (rv) { if (devname) pr_err("Failed to load all information " "sections on %s\n", devname); free_imsm(super); return rv; } st->sb = super; if (st->ss == NULL) { st->ss = &super_imsm; st->minor_version = 0; st->max_devs = IMSM_MAX_DEVICES; } /* load migration record */ if (load_imsm_migr_rec(super, NULL) == 0) { /* Check for unsupported migration features */ if (check_mpb_migr_compatibility(super) != 0) { pr_err("Unsupported migration detected"); if (devname) fprintf(stderr, " on %s\n", devname); else fprintf(stderr, " (IMSM).\n"); return 3; } } return 0; } static __u16 info_to_blocks_per_strip(mdu_array_info_t *info) { if (info->level == 1) return 128; return info->chunk_size >> 9; } static unsigned long long info_to_blocks_per_member(mdu_array_info_t *info, unsigned long long size) { if (info->level == 1) return size * 2; else return (size * 2) & ~(info_to_blocks_per_strip(info) - 1); } static void imsm_update_version_info(struct intel_super *super) { /* update the version and attributes */ struct imsm_super *mpb = super->anchor; char *version; struct imsm_dev *dev; struct imsm_map *map; int i; for (i = 0; i < mpb->num_raid_devs; i++) { dev = get_imsm_dev(super, i); map = get_imsm_map(dev, MAP_0); if (__le32_to_cpu(dev->size_high) > 0) mpb->attributes |= MPB_ATTRIB_2TB; /* FIXME detect when an array spans a port multiplier */ #if 0 mpb->attributes |= MPB_ATTRIB_PM; #endif if (mpb->num_raid_devs > 1 || mpb->attributes != MPB_ATTRIB_CHECKSUM_VERIFY) { version = MPB_VERSION_ATTRIBS; switch (get_imsm_raid_level(map)) { case 0: mpb->attributes |= MPB_ATTRIB_RAID0; break; case 1: mpb->attributes |= MPB_ATTRIB_RAID1; break; case 10: mpb->attributes |= MPB_ATTRIB_RAID10; break; case 5: mpb->attributes |= MPB_ATTRIB_RAID5; break; } } else { if (map->num_members >= 5) version = MPB_VERSION_5OR6_DISK_ARRAY; else if (dev->status == DEV_CLONE_N_GO) version = MPB_VERSION_CNG; else if (get_imsm_raid_level(map) == 5) version = MPB_VERSION_RAID5; else if (map->num_members >= 3) version = MPB_VERSION_3OR4_DISK_ARRAY; else if (get_imsm_raid_level(map) == 1) version = MPB_VERSION_RAID1; else version = MPB_VERSION_RAID0; } strcpy(((char *) mpb->sig) + strlen(MPB_SIGNATURE), version); } } static int check_name(struct intel_super *super, char *name, int quiet) { struct imsm_super *mpb = super->anchor; char *reason = NULL; int i; if (strlen(name) > MAX_RAID_SERIAL_LEN) reason = "must be 16 characters or less"; for (i = 0; i < mpb->num_raid_devs; i++) { struct imsm_dev *dev = get_imsm_dev(super, i); if (strncmp((char *) dev->volume, name, MAX_RAID_SERIAL_LEN) == 0) { reason = "already exists"; break; } } if (reason && !quiet) pr_err("imsm volume name %s\n", reason); return !reason; } static int init_super_imsm_volume(struct supertype *st, mdu_array_info_t *info, unsigned long long size, char *name, char *homehost, int *uuid, long long data_offset) { /* We are creating a volume inside a pre-existing container. * so st->sb is already set. */ struct intel_super *super = st->sb; struct imsm_super *mpb = super->anchor; struct intel_dev *dv; struct imsm_dev *dev; struct imsm_vol *vol; struct imsm_map *map; int idx = mpb->num_raid_devs; int i; unsigned long long array_blocks; size_t size_old, size_new; unsigned long long num_data_stripes; if (super->orom && mpb->num_raid_devs >= super->orom->vpa) { pr_err("This imsm-container already has the " "maximum of %d volumes\n", super->orom->vpa); return 0; } /* ensure the mpb is large enough for the new data */ size_old = __le32_to_cpu(mpb->mpb_size); size_new = disks_to_mpb_size(info->nr_disks); if (size_new > size_old) { void *mpb_new; size_t size_round = ROUND_UP(size_new, 512); if (posix_memalign(&mpb_new, 512, size_round) != 0) { pr_err("could not allocate new mpb\n"); return 0; } if (posix_memalign(&super->migr_rec_buf, 512, MIGR_REC_BUF_SIZE) != 0) { pr_err("%s could not allocate migr_rec buffer\n", __func__); free(super->buf); free(super); free(mpb_new); return 0; } memcpy(mpb_new, mpb, size_old); free(mpb); mpb = mpb_new; super->anchor = mpb_new; mpb->mpb_size = __cpu_to_le32(size_new); memset(mpb_new + size_old, 0, size_round - size_old); } super->current_vol = idx; /* handle 'failed_disks' by either: * a) create dummy disk entries in the table if this the first * volume in the array. We add them here as this is the only * opportunity to add them. add_to_super_imsm_volume() * handles the non-failed disks and continues incrementing * mpb->num_disks. * b) validate that 'failed_disks' matches the current number * of missing disks if the container is populated */ if (super->current_vol == 0) { mpb->num_disks = 0; for (i = 0; i < info->failed_disks; i++) { struct imsm_disk *disk; mpb->num_disks++; disk = __get_imsm_disk(mpb, i); disk->status = CONFIGURED_DISK | FAILED_DISK; disk->scsi_id = __cpu_to_le32(~(__u32)0); snprintf((char *) disk->serial, MAX_RAID_SERIAL_LEN, "missing:%d", i); } find_missing(super); } else { int missing = 0; struct dl *d; for (d = super->missing; d; d = d->next) missing++; if (info->failed_disks > missing) { pr_err("unable to add 'missing' disk to container\n"); return 0; } } if (!check_name(super, name, 0)) return 0; dv = xmalloc(sizeof(*dv)); dev = xcalloc(1, sizeof(*dev) + sizeof(__u32) * (info->raid_disks - 1)); strncpy((char *) dev->volume, name, MAX_RAID_SERIAL_LEN); array_blocks = calc_array_size(info->level, info->raid_disks, info->layout, info->chunk_size, size * 2); /* round array size down to closest MB */ array_blocks = (array_blocks >> SECT_PER_MB_SHIFT) << SECT_PER_MB_SHIFT; dev->size_low = __cpu_to_le32((__u32) array_blocks); dev->size_high = __cpu_to_le32((__u32) (array_blocks >> 32)); dev->status = (DEV_READ_COALESCING | DEV_WRITE_COALESCING); vol = &dev->vol; vol->migr_state = 0; set_migr_type(dev, MIGR_INIT); vol->dirty = !info->state; vol->curr_migr_unit = 0; map = get_imsm_map(dev, MAP_0); set_pba_of_lba0(map, super->create_offset); set_blocks_per_member(map, info_to_blocks_per_member(info, size)); map->blocks_per_strip = __cpu_to_le16(info_to_blocks_per_strip(info)); map->failed_disk_num = ~0; if (info->level > 0) map->map_state = (info->state ? IMSM_T_STATE_NORMAL : IMSM_T_STATE_UNINITIALIZED); else map->map_state = info->failed_disks ? IMSM_T_STATE_FAILED : IMSM_T_STATE_NORMAL; map->ddf = 1; if (info->level == 1 && info->raid_disks > 2) { free(dev); free(dv); pr_err("imsm does not support more than 2 disks" "in a raid1 volume\n"); return 0; } map->raid_level = info->level; if (info->level == 10) { map->raid_level = 1; map->num_domains = info->raid_disks / 2; } else if (info->level == 1) map->num_domains = info->raid_disks; else map->num_domains = 1; /* info->size is only int so use the 'size' parameter instead */ num_data_stripes = (size * 2) / info_to_blocks_per_strip(info); num_data_stripes /= map->num_domains; set_num_data_stripes(map, num_data_stripes); map->num_members = info->raid_disks; for (i = 0; i < map->num_members; i++) { /* initialized in add_to_super */ set_imsm_ord_tbl_ent(map, i, IMSM_ORD_REBUILD); } mpb->num_raid_devs++; dv->dev = dev; dv->index = super->current_vol; dv->next = super->devlist; super->devlist = dv; imsm_update_version_info(super); return 1; } static int init_super_imsm(struct supertype *st, mdu_array_info_t *info, unsigned long long size, char *name, char *homehost, int *uuid, unsigned long long data_offset) { /* This is primarily called by Create when creating a new array. * We will then get add_to_super called for each component, and then * write_init_super called to write it out to each device. * For IMSM, Create can create on fresh devices or on a pre-existing * array. * To create on a pre-existing array a different method will be called. * This one is just for fresh drives. */ struct intel_super *super; struct imsm_super *mpb; size_t mpb_size; char *version; if (data_offset != INVALID_SECTORS) { pr_err("data-offset not supported by imsm\n"); return 0; } if (st->sb) return init_super_imsm_volume(st, info, size, name, homehost, uuid, data_offset); if (info) mpb_size = disks_to_mpb_size(info->nr_disks); else mpb_size = 512; super = alloc_super(); if (super && posix_memalign(&super->buf, 512, mpb_size) != 0) { free(super); super = NULL; } if (!super) { pr_err("%s could not allocate superblock\n", __func__); return 0; } if (posix_memalign(&super->migr_rec_buf, 512, MIGR_REC_BUF_SIZE) != 0) { pr_err("%s could not allocate migr_rec buffer\n", __func__); free(super->buf); free(super); return 0; } memset(super->buf, 0, mpb_size); mpb = super->buf; mpb->mpb_size = __cpu_to_le32(mpb_size); st->sb = super; if (info == NULL) { /* zeroing superblock */ return 0; } mpb->attributes = MPB_ATTRIB_CHECKSUM_VERIFY; version = (char *) mpb->sig; strcpy(version, MPB_SIGNATURE); version += strlen(MPB_SIGNATURE); strcpy(version, MPB_VERSION_RAID0); return 1; } #ifndef MDASSEMBLE static int add_to_super_imsm_volume(struct supertype *st, mdu_disk_info_t *dk, int fd, char *devname) { struct intel_super *super = st->sb; struct imsm_super *mpb = super->anchor; struct imsm_disk *_disk; struct imsm_dev *dev; struct imsm_map *map; struct dl *dl, *df; int slot; dev = get_imsm_dev(super, super->current_vol); map = get_imsm_map(dev, MAP_0); if (! (dk->state & (1<<MD_DISK_SYNC))) { pr_err("%s: Cannot add spare devices to IMSM volume\n", devname); return 1; } if (fd == -1) { /* we're doing autolayout so grab the pre-marked (in * validate_geometry) raid_disk */ for (dl = super->disks; dl; dl = dl->next) if (dl->raiddisk == dk->raid_disk) break; } else { for (dl = super->disks; dl ; dl = dl->next) if (dl->major == dk->major && dl->minor == dk->minor) break; } if (!dl) { pr_err("%s is not a member of the same container\n", devname); return 1; } /* add a pristine spare to the metadata */ if (dl->index < 0) { dl->index = super->anchor->num_disks; super->anchor->num_disks++; } /* Check the device has not already been added */ slot = get_imsm_disk_slot(map, dl->index); if (slot >= 0 && (get_imsm_ord_tbl_ent(dev, slot, MAP_X) & IMSM_ORD_REBUILD) == 0) { pr_err("%s has been included in this array twice\n", devname); return 1; } set_imsm_ord_tbl_ent(map, dk->raid_disk, dl->index); dl->disk.status = CONFIGURED_DISK; /* update size of 'missing' disks to be at least as large as the * largest acitve member (we only have dummy missing disks when * creating the first volume) */ if (super->current_vol == 0) { for (df = super->missing; df; df = df->next) { if (total_blocks(&dl->disk) > total_blocks(&df->disk)) set_total_blocks(&df->disk, total_blocks(&dl->disk)); _disk = __get_imsm_disk(mpb, df->index); *_disk = df->disk; } } /* refresh unset/failed slots to point to valid 'missing' entries */ for (df = super->missing; df; df = df->next) for (slot = 0; slot < mpb->num_disks; slot++) { __u32 ord = get_imsm_ord_tbl_ent(dev, slot, MAP_X); if ((ord & IMSM_ORD_REBUILD) == 0) continue; set_imsm_ord_tbl_ent(map, slot, df->index | IMSM_ORD_REBUILD); if (is_gen_migration(dev)) { struct imsm_map *map2 = get_imsm_map(dev, MAP_1); int slot2 = get_imsm_disk_slot(map2, df->index); if ((slot2 < map2->num_members) && (slot2 >= 0)) { __u32 ord2 = get_imsm_ord_tbl_ent(dev, slot2, MAP_1); if ((unsigned)df->index == ord_to_idx(ord2)) set_imsm_ord_tbl_ent(map2, slot2, df->index | IMSM_ORD_REBUILD); } } dprintf("set slot:%d to missing disk:%d\n", slot, df->index); break; } /* if we are creating the first raid device update the family number */ if (super->current_vol == 0) { __u32 sum; struct imsm_dev *_dev = __get_imsm_dev(mpb, 0); _disk = __get_imsm_disk(mpb, dl->index); if (!_dev || !_disk) { pr_err("BUG mpb setup error\n"); return 1; } *_dev = *dev; *_disk = dl->disk; sum = random32(); sum += __gen_imsm_checksum(mpb); mpb->family_num = __cpu_to_le32(sum); mpb->orig_family_num = mpb->family_num; } super->current_disk = dl; return 0; } /* mark_spare() * Function marks disk as spare and restores disk serial * in case it was previously marked as failed by takeover operation * reruns: * -1 : critical error * 0 : disk is marked as spare but serial is not set * 1 : success */ int mark_spare(struct dl *disk) { __u8 serial[MAX_RAID_SERIAL_LEN]; int ret_val = -1; if (!disk) return ret_val; ret_val = 0; if (!imsm_read_serial(disk->fd, NULL, serial)) { /* Restore disk serial number, because takeover marks disk * as failed and adds to serial ':0' before it becomes * a spare disk. */ serialcpy(disk->serial, serial); serialcpy(disk->disk.serial, serial); ret_val = 1; } disk->disk.status = SPARE_DISK; disk->index = -1; return ret_val; } static int add_to_super_imsm(struct supertype *st, mdu_disk_info_t *dk, int fd, char *devname, unsigned long long data_offset) { struct intel_super *super = st->sb; struct dl *dd; unsigned long long size; __u32 id; int rv; struct stat stb; /* If we are on an RAID enabled platform check that the disk is * attached to the raid controller. * We do not need to test disks attachment for container based additions, * they shall be already tested when container was created/assembled. */ rv = find_intel_hba_capability(fd, super, devname); /* no orom/efi or non-intel hba of the disk */ if (rv != 0) { dprintf("capability: %p fd: %d ret: %d\n", super->orom, fd, rv); return 1; } if (super->current_vol >= 0) return add_to_super_imsm_volume(st, dk, fd, devname); fstat(fd, &stb); dd = xcalloc(sizeof(*dd), 1); dd->major = major(stb.st_rdev); dd->minor = minor(stb.st_rdev); dd->devname = devname ? xstrdup(devname) : NULL; dd->fd = fd; dd->e = NULL; dd->action = DISK_ADD; rv = imsm_read_serial(fd, devname, dd->serial); if (rv) { pr_err("failed to retrieve scsi serial, aborting\n"); free(dd); abort(); } get_dev_size(fd, NULL, &size); size /= 512; serialcpy(dd->disk.serial, dd->serial); set_total_blocks(&dd->disk, size); if (__le32_to_cpu(dd->disk.total_blocks_hi) > 0) { struct imsm_super *mpb = super->anchor; mpb->attributes |= MPB_ATTRIB_2TB_DISK; } mark_spare(dd); if (sysfs_disk_to_scsi_id(fd, &id) == 0) dd->disk.scsi_id = __cpu_to_le32(id); else dd->disk.scsi_id = __cpu_to_le32(0); if (st->update_tail) { dd->next = super->disk_mgmt_list; super->disk_mgmt_list = dd; } else { dd->next = super->disks; super->disks = dd; super->updates_pending++; } return 0; } static int remove_from_super_imsm(struct supertype *st, mdu_disk_info_t *dk) { struct intel_super *super = st->sb; struct dl *dd; /* remove from super works only in mdmon - for communication * manager - monitor. Check if communication memory buffer * is prepared. */ if (!st->update_tail) { pr_err("%s shall be used in mdmon context only" "(line %d).\n", __func__, __LINE__); return 1; } dd = xcalloc(1, sizeof(*dd)); dd->major = dk->major; dd->minor = dk->minor; dd->fd = -1; mark_spare(dd); dd->action = DISK_REMOVE; dd->next = super->disk_mgmt_list; super->disk_mgmt_list = dd; return 0; } static int store_imsm_mpb(int fd, struct imsm_super *mpb); static union { char buf[512]; struct imsm_super anchor; } spare_record __attribute__ ((aligned(512))); /* spare records have their own family number and do not have any defined raid * devices */ static int write_super_imsm_spares(struct intel_super *super, int doclose) { struct imsm_super *mpb = super->anchor; struct imsm_super *spare = &spare_record.anchor; __u32 sum; struct dl *d; spare->mpb_size = __cpu_to_le32(sizeof(struct imsm_super)), spare->generation_num = __cpu_to_le32(1UL), spare->attributes = MPB_ATTRIB_CHECKSUM_VERIFY; spare->num_disks = 1, spare->num_raid_devs = 0, spare->cache_size = mpb->cache_size, spare->pwr_cycle_count = __cpu_to_le32(1), snprintf((char *) spare->sig, MAX_SIGNATURE_LENGTH, MPB_SIGNATURE MPB_VERSION_RAID0); for (d = super->disks; d; d = d->next) { if (d->index != -1) continue; spare->disk[0] = d->disk; if (__le32_to_cpu(d->disk.total_blocks_hi) > 0) spare->attributes |= MPB_ATTRIB_2TB_DISK; sum = __gen_imsm_checksum(spare); spare->family_num = __cpu_to_le32(sum); spare->orig_family_num = 0; sum = __gen_imsm_checksum(spare); spare->check_sum = __cpu_to_le32(sum); if (store_imsm_mpb(d->fd, spare)) { pr_err("%s: failed for device %d:%d %s\n", __func__, d->major, d->minor, strerror(errno)); return 1; } if (doclose) { close(d->fd); d->fd = -1; } } return 0; } static int write_super_imsm(struct supertype *st, int doclose) { struct intel_super *super = st->sb; struct imsm_super *mpb = super->anchor; struct dl *d; __u32 generation; __u32 sum; int spares = 0; int i; __u32 mpb_size = sizeof(struct imsm_super) - sizeof(struct imsm_disk); int num_disks = 0; int clear_migration_record = 1; /* 'generation' is incremented everytime the metadata is written */ generation = __le32_to_cpu(mpb->generation_num); generation++; mpb->generation_num = __cpu_to_le32(generation); /* fix up cases where previous mdadm releases failed to set * orig_family_num */ if (mpb->orig_family_num == 0) mpb->orig_family_num = mpb->family_num; for (d = super->disks; d; d = d->next) { if (d->index == -1) spares++; else { mpb->disk[d->index] = d->disk; num_disks++; } } for (d = super->missing; d; d = d->next) { mpb->disk[d->index] = d->disk; num_disks++; } mpb->num_disks = num_disks; mpb_size += sizeof(struct imsm_disk) * mpb->num_disks; for (i = 0; i < mpb->num_raid_devs; i++) { struct imsm_dev *dev = __get_imsm_dev(mpb, i); struct imsm_dev *dev2 = get_imsm_dev(super, i); if (dev && dev2) { imsm_copy_dev(dev, dev2); mpb_size += sizeof_imsm_dev(dev, 0); } if (is_gen_migration(dev2)) clear_migration_record = 0; } mpb_size += __le32_to_cpu(mpb->bbm_log_size); mpb->mpb_size = __cpu_to_le32(mpb_size); /* recalculate checksum */ sum = __gen_imsm_checksum(mpb); mpb->check_sum = __cpu_to_le32(sum); if (super->clean_migration_record_by_mdmon) { clear_migration_record = 1; super->clean_migration_record_by_mdmon = 0; } if (clear_migration_record) memset(super->migr_rec_buf, 0, MIGR_REC_BUF_SIZE); /* write the mpb for disks that compose raid devices */ for (d = super->disks; d ; d = d->next) { if (d->index < 0 || is_failed(&d->disk)) continue; if (clear_migration_record) { unsigned long long dsize; get_dev_size(d->fd, NULL, &dsize); if (lseek64(d->fd, dsize - 512, SEEK_SET) >= 0) { if (write(d->fd, super->migr_rec_buf, MIGR_REC_BUF_SIZE) != MIGR_REC_BUF_SIZE) perror("Write migr_rec failed"); } } if (store_imsm_mpb(d->fd, mpb)) fprintf(stderr, "%s: failed for device %d:%d (fd: %d)%s\n", __func__, d->major, d->minor, d->fd, strerror(errno)); if (doclose) { close(d->fd); d->fd = -1; } } if (spares) return write_super_imsm_spares(super, doclose); return 0; } static int create_array(struct supertype *st, int dev_idx) { size_t len; struct imsm_update_create_array *u; struct intel_super *super = st->sb; struct imsm_dev *dev = get_imsm_dev(super, dev_idx); struct imsm_map *map = get_imsm_map(dev, MAP_0); struct disk_info *inf; struct imsm_disk *disk; int i; len = sizeof(*u) - sizeof(*dev) + sizeof_imsm_dev(dev, 0) + sizeof(*inf) * map->num_members; u = xmalloc(len); u->type = update_create_array; u->dev_idx = dev_idx; imsm_copy_dev(&u->dev, dev); inf = get_disk_info(u); for (i = 0; i < map->num_members; i++) { int idx = get_imsm_disk_idx(dev, i, MAP_X); disk = get_imsm_disk(super, idx); if (!disk) disk = get_imsm_missing(super, idx); serialcpy(inf[i].serial, disk->serial); } append_metadata_update(st, u, len); return 0; } static int mgmt_disk(struct supertype *st) { struct intel_super *super = st->sb; size_t len; struct imsm_update_add_remove_disk *u; if (!super->disk_mgmt_list) return 0; len = sizeof(*u); u = xmalloc(len); u->type = update_add_remove_disk; append_metadata_update(st, u, len); return 0; } static int write_init_super_imsm(struct supertype *st) { struct intel_super *super = st->sb; int current_vol = super->current_vol; /* we are done with current_vol reset it to point st at the container */ super->current_vol = -1; if (st->update_tail) { /* queue the recently created array / added disk * as a metadata update */ int rv; /* determine if we are creating a volume or adding a disk */ if (current_vol < 0) { /* in the mgmt (add/remove) disk case we are running * in mdmon context, so don't close fd's */ return mgmt_disk(st); } else rv = create_array(st, current_vol); return rv; } else { struct dl *d; for (d = super->disks; d; d = d->next) Kill(d->devname, NULL, 0, -1, 1); return write_super_imsm(st, 1); } } #endif static int store_super_imsm(struct supertype *st, int fd) { struct intel_super *super = st->sb; struct imsm_super *mpb = super ? super->anchor : NULL; if (!mpb) return 1; #ifndef MDASSEMBLE return store_imsm_mpb(fd, mpb); #else return 1; #endif } static int imsm_bbm_log_size(struct imsm_super *mpb) { return __le32_to_cpu(mpb->bbm_log_size); } #ifndef MDASSEMBLE static int validate_geometry_imsm_container(struct supertype *st, int level, int layout, int raiddisks, int chunk, unsigned long long size, unsigned long long data_offset, char *dev, unsigned long long *freesize, int verbose) { int fd; unsigned long long ldsize; struct intel_super *super=NULL; int rv = 0; if (level != LEVEL_CONTAINER) return 0; if (!dev) return 1; fd = open(dev, O_RDONLY|O_EXCL, 0); if (fd < 0) { if (verbose > 0) pr_err("imsm: Cannot open %s: %s\n", dev, strerror(errno)); return 0; } if (!get_dev_size(fd, dev, &ldsize)) { close(fd); return 0; } /* capabilities retrieve could be possible * note that there is no fd for the disks in array. */ super = alloc_super(); rv = find_intel_hba_capability(fd, super, verbose > 0 ? dev : NULL); if (rv != 0) { #if DEBUG char str[256]; fd2devname(fd, str); dprintf("validate_geometry_imsm_container: fd: %d %s orom: %p rv: %d raiddisk: %d\n", fd, str, super->orom, rv, raiddisks); #endif /* no orom/efi or non-intel hba of the disk */ close(fd); free_imsm(super); return 0; } close(fd); if (super->orom) { if (raiddisks > super->orom->tds) { if (verbose) pr_err("%d exceeds maximum number of" " platform supported disks: %d\n", raiddisks, super->orom->tds); free_imsm(super); return 0; } if ((super->orom->attr & IMSM_OROM_ATTR_2TB_DISK) == 0 && (ldsize >> 9) >> 32 > 0) { if (verbose) pr_err("%s exceeds maximum platform supported size\n", dev); free_imsm(super); return 0; } } *freesize = avail_size_imsm(st, ldsize >> 9, data_offset); free_imsm(super); return 1; } static unsigned long long find_size(struct extent *e, int *idx, int num_extents) { const unsigned long long base_start = e[*idx].start; unsigned long long end = base_start + e[*idx].size; int i; if (base_start == end) return 0; *idx = *idx + 1; for (i = *idx; i < num_extents; i++) { /* extend overlapping extents */ if (e[i].start >= base_start && e[i].start <= end) { if (e[i].size == 0) return 0; if (e[i].start + e[i].size > end) end = e[i].start + e[i].size; } else if (e[i].start > end) { *idx = i; break; } } return end - base_start; } static unsigned long long merge_extents(struct intel_super *super, int sum_extents) { /* build a composite disk with all known extents and generate a new * 'maxsize' given the "all disks in an array must share a common start * offset" constraint */ struct extent *e = xcalloc(sum_extents, sizeof(*e)); struct dl *dl; int i, j; int start_extent; unsigned long long pos; unsigned long long start = 0; unsigned long long maxsize; unsigned long reserve; /* coalesce and sort all extents. also, check to see if we need to * reserve space between member arrays */ j = 0; for (dl = super->disks; dl; dl = dl->next) { if (!dl->e) continue; for (i = 0; i < dl->extent_cnt; i++) e[j++] = dl->e[i]; } qsort(e, sum_extents, sizeof(*e), cmp_extent); /* merge extents */ i = 0; j = 0; while (i < sum_extents) { e[j].start = e[i].start; e[j].size = find_size(e, &i, sum_extents); j++; if (e[j-1].size == 0) break; } pos = 0; maxsize = 0; start_extent = 0; i = 0; do { unsigned long long esize; esize = e[i].start - pos; if (esize >= maxsize) { maxsize = esize; start = pos; start_extent = i; } pos = e[i].start + e[i].size; i++; } while (e[i-1].size); free(e); if (maxsize == 0) return 0; /* FIXME assumes volume at offset 0 is the first volume in a * container */ if (start_extent > 0) reserve = IMSM_RESERVED_SECTORS; /* gap between raid regions */ else reserve = 0; if (maxsize < reserve) return 0; super->create_offset = ~((unsigned long long) 0); if (start + reserve > super->create_offset) return 0; /* start overflows create_offset */ super->create_offset = start + reserve; return maxsize - reserve; } static int is_raid_level_supported(const struct imsm_orom *orom, int level, int raiddisks) { if (level < 0 || level == 6 || level == 4) return 0; /* if we have an orom prevent invalid raid levels */ if (orom) switch (level) { case 0: return imsm_orom_has_raid0(orom); case 1: if (raiddisks > 2) return imsm_orom_has_raid1e(orom); return imsm_orom_has_raid1(orom) && raiddisks == 2; case 10: return imsm_orom_has_raid10(orom) && raiddisks == 4; case 5: return imsm_orom_has_raid5(orom) && raiddisks > 2; } else return 1; /* not on an Intel RAID platform so anything goes */ return 0; } static int active_arrays_by_format(char *name, char* hba, struct md_list **devlist, int dpa, int verbose) { struct mdstat_ent *mdstat = mdstat_read(0, 0); struct mdstat_ent *memb = NULL; int count = 0; int num = 0; struct md_list *dv = NULL; int found; for (memb = mdstat ; memb ; memb = memb->next) { if (memb->metadata_version && (strncmp(memb->metadata_version, "external:", 9) == 0) && (strcmp(&memb->metadata_version[9], name) == 0) && !is_subarray(memb->metadata_version+9) && memb->members) { struct dev_member *dev = memb->members; int fd = -1; while(dev && (fd < 0)) { char *path = xmalloc(strlen(dev->name) + strlen("/dev/") + 1); num = sprintf(path, "%s%s", "/dev/", dev->name); if (num > 0) fd = open(path, O_RDONLY, 0); if ((num <= 0) || (fd < 0)) { pr_vrb(": Cannot open %s: %s\n", dev->name, strerror(errno)); } free(path); dev = dev->next; } found = 0; if ((fd >= 0) && disk_attached_to_hba(fd, hba)) { struct mdstat_ent *vol; for (vol = mdstat ; vol ; vol = vol->next) { if ((vol->active > 0) && vol->metadata_version && is_container_member(vol, memb->dev)) { found++; count++; } } if (*devlist && (found < dpa)) { dv = xcalloc(1, sizeof(*dv)); dv->devname = xmalloc(strlen(memb->dev) + strlen("/dev/") + 1); sprintf(dv->devname, "%s%s", "/dev/", memb->dev); dv->found = found; dv->used = 0; dv->next = *devlist; *devlist = dv; } } if (fd >= 0) close(fd); } } free_mdstat(mdstat); return count; } #ifdef DEBUG_LOOP static struct md_list* get_loop_devices(void) { int i; struct md_list *devlist = NULL; struct md_list *dv = NULL; for(i = 0; i < 12; i++) { dv = xcalloc(1, sizeof(*dv)); dv->devname = xmalloc(40); sprintf(dv->devname, "/dev/loop%d", i); dv->next = devlist; devlist = dv; } return devlist; } #endif static struct md_list* get_devices(const char *hba_path) { struct md_list *devlist = NULL; struct md_list *dv = NULL; struct dirent *ent; DIR *dir; int err = 0; #if DEBUG_LOOP devlist = get_loop_devices(); return devlist; #endif /* scroll through /sys/dev/block looking for devices attached to * this hba */ dir = opendir("/sys/dev/block"); for (ent = dir ? readdir(dir) : NULL; ent; ent = readdir(dir)) { int fd; char buf[1024]; int major, minor; char *path = NULL; if (sscanf(ent->d_name, "%d:%d", &major, &minor) != 2) continue; path = devt_to_devpath(makedev(major, minor)); if (!path) continue; if (!path_attached_to_hba(path, hba_path)) { free(path); path = NULL; continue; } free(path); path = NULL; fd = dev_open(ent->d_name, O_RDONLY); if (fd >= 0) { fd2devname(fd, buf); close(fd); } else { pr_err("cannot open device: %s\n", ent->d_name); continue; } dv = xcalloc(1, sizeof(*dv)); dv->devname = xstrdup(buf); dv->next = devlist; devlist = dv; } if (err) { while(devlist) { dv = devlist; devlist = devlist->next; free(dv->devname); free(dv); } } closedir(dir); return devlist; } static int count_volumes_list(struct md_list *devlist, char *homehost, int verbose, int *found) { struct md_list *tmpdev; int count = 0; struct supertype *st = NULL; /* first walk the list of devices to find a consistent set * that match the criterea, if that is possible. * We flag the ones we like with 'used'. */ *found = 0; st = match_metadata_desc_imsm("imsm"); if (st == NULL) { pr_vrb(": cannot allocate memory for imsm supertype\n"); return 0; } for (tmpdev = devlist; tmpdev; tmpdev = tmpdev->next) { char *devname = tmpdev->devname; struct stat stb; struct supertype *tst; int dfd; if (tmpdev->used > 1) continue; tst = dup_super(st); if (tst == NULL) { pr_vrb(": cannot allocate memory for imsm supertype\n"); goto err_1; } tmpdev->container = 0; dfd = dev_open(devname, O_RDONLY|O_EXCL); if (dfd < 0) { dprintf(": cannot open device %s: %s\n", devname, strerror(errno)); tmpdev->used = 2; } else if (fstat(dfd, &stb)< 0) { /* Impossible! */ dprintf(": fstat failed for %s: %s\n", devname, strerror(errno)); tmpdev->used = 2; } else if ((stb.st_mode & S_IFMT) != S_IFBLK) { dprintf(": %s is not a block device.\n", devname); tmpdev->used = 2; } else if (must_be_container(dfd)) { struct supertype *cst; cst = super_by_fd(dfd, NULL); if (cst == NULL) { dprintf(": cannot recognize container type %s\n", devname); tmpdev->used = 2; } else if (tst->ss != st->ss) { dprintf(": non-imsm container - ignore it: %s\n", devname); tmpdev->used = 2; } else if (!tst->ss->load_container || tst->ss->load_container(tst, dfd, NULL)) tmpdev->used = 2; else { tmpdev->container = 1; } if (cst) cst->ss->free_super(cst); } else { tmpdev->st_rdev = stb.st_rdev; if (tst->ss->load_super(tst,dfd, NULL)) { dprintf(": no RAID superblock on %s\n", devname); tmpdev->used = 2; } else if (tst->ss->compare_super == NULL) { dprintf(": Cannot assemble %s metadata on %s\n", tst->ss->name, devname); tmpdev->used = 2; } } if (dfd >= 0) close(dfd); if (tmpdev->used == 2 || tmpdev->used == 4) { /* Ignore unrecognised devices during auto-assembly */ goto loop; } else { struct mdinfo info; tst->ss->getinfo_super(tst, &info, NULL); if (st->minor_version == -1) st->minor_version = tst->minor_version; if (memcmp(info.uuid, uuid_zero, sizeof(int[4])) == 0) { /* this is a floating spare. It cannot define * an array unless there are no more arrays of * this type to be found. It can be included * in an array of this type though. */ tmpdev->used = 3; goto loop; } if (st->ss != tst->ss || st->minor_version != tst->minor_version || st->ss->compare_super(st, tst) != 0) { /* Some mismatch. If exactly one array matches this host, * we can resolve on that one. * Or, if we are auto assembling, we just ignore the second * for now. */ dprintf(": superblock on %s doesn't match others - assembly aborted\n", devname); goto loop; } tmpdev->used = 1; *found = 1; dprintf("found: devname: %s\n", devname); } loop: if (tst) tst->ss->free_super(tst); } if (*found != 0) { int err; if ((err = load_super_imsm_all(st, -1, &st->sb, NULL, devlist, 0)) == 0) { struct mdinfo *iter, *head = st->ss->container_content(st, NULL); for (iter = head; iter; iter = iter->next) { dprintf("content->text_version: %s vol\n", iter->text_version); if (iter->array.state & (1<<MD_SB_BLOCK_VOLUME)) { /* do not assemble arrays with unsupported configurations */ dprintf(": Cannot activate member %s.\n", iter->text_version); } else count++; } sysfs_free(head); } else { dprintf(" no valid super block on device list: err: %d %p\n", err, st->sb); } } else { dprintf(" no more devices to examin\n"); } for (tmpdev = devlist; tmpdev; tmpdev = tmpdev->next) { if ((tmpdev->used == 1) && (tmpdev->found)) { if (count) { if (count < tmpdev->found) count = 0; else count -= tmpdev->found; } } if (tmpdev->used == 1) tmpdev->used = 4; } err_1: if (st) st->ss->free_super(st); return count; } static int count_volumes(char *hba, int dpa, int verbose) { struct md_list *devlist = NULL; int count = 0; int found = 0;; devlist = get_devices(hba); /* if no intel devices return zero volumes */ if (devlist == NULL) return 0; count = active_arrays_by_format("imsm", hba, &devlist, dpa, verbose); dprintf(" path: %s active arrays: %d\n", hba, count); if (devlist == NULL) return 0; do { found = 0; count += count_volumes_list(devlist, NULL, verbose, &found); dprintf("found %d count: %d\n", found, count); } while (found); dprintf("path: %s total number of volumes: %d\n", hba, count); while(devlist) { struct md_list *dv = devlist; devlist = devlist->next; free(dv->devname); free(dv); } return count; } static int imsm_default_chunk(const struct imsm_orom *orom) { /* up to 512 if the plaform supports it, otherwise the platform max. * 128 if no platform detected */ int fs = max(7, orom ? fls(orom->sss) : 0); return min(512, (1 << fs)); } static int validate_geometry_imsm_orom(struct intel_super *super, int level, int layout, int raiddisks, int *chunk, unsigned long long size, int verbose) { /* check/set platform and metadata limits/defaults */ if (super->orom && raiddisks > super->orom->dpa) { pr_vrb(": platform supports a maximum of %d disks per array\n", super->orom->dpa); return 0; } /* capabilities of OROM tested - copied from validate_geometry_imsm_volume */ if (!is_raid_level_supported(super->orom, level, raiddisks)) { pr_vrb(": platform does not support raid%d with %d disk%s\n", level, raiddisks, raiddisks > 1 ? "s" : ""); return 0; } if (*chunk == 0 || *chunk == UnSet) *chunk = imsm_default_chunk(super->orom); if (super->orom && !imsm_orom_has_chunk(super->orom, *chunk)) { pr_vrb(": platform does not support a chunk size of: " "%d\n", *chunk); return 0; } if (layout != imsm_level_to_layout(level)) { if (level == 5) pr_vrb(": imsm raid 5 only supports the left-asymmetric layout\n"); else if (level == 10) pr_vrb(": imsm raid 10 only supports the n2 layout\n"); else pr_vrb(": imsm unknown layout %#x for this raid level %d\n", layout, level); return 0; } if (super->orom && (super->orom->attr & IMSM_OROM_ATTR_2TB) == 0 && (calc_array_size(level, raiddisks, layout, *chunk, size) >> 32) > 0) { pr_vrb(": platform does not support a volume size over 2TB\n"); return 0; } return 1; } /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd * FIX ME add ahci details */ static int validate_geometry_imsm_volume(struct supertype *st, int level, int layout, int raiddisks, int *chunk, unsigned long long size, unsigned long long data_offset, char *dev, unsigned long long *freesize, int verbose) { struct stat stb; struct intel_super *super = st->sb; struct imsm_super *mpb; struct dl *dl; unsigned long long pos = 0; unsigned long long maxsize; struct extent *e; int i; /* We must have the container info already read in. */ if (!super) return 0; mpb = super->anchor; if (!validate_geometry_imsm_orom(super, level, layout, raiddisks, chunk, size, verbose)) { pr_err("RAID gemetry validation failed. " "Cannot proceed with the action(s).\n"); return 0; } if (!dev) { /* General test: make sure there is space for * 'raiddisks' device extents of size 'size' at a given * offset */ unsigned long long minsize = size; unsigned long long start_offset = MaxSector; int dcnt = 0; if (minsize == 0) minsize = MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS; for (dl = super->disks; dl ; dl = dl->next) { int found = 0; pos = 0; i = 0; e = get_extents(super, dl); if (!e) continue; do { unsigned long long esize; esize = e[i].start - pos; if (esize >= minsize) found = 1; if (found && start_offset == MaxSector) { start_offset = pos; break; } else if (found && pos != start_offset) { found = 0; break; } pos = e[i].start + e[i].size; i++; } while (e[i-1].size); if (found) dcnt++; free(e); } if (dcnt < raiddisks) { if (verbose) pr_err("imsm: Not enough " "devices with space for this array " "(%d < %d)\n", dcnt, raiddisks); return 0; } return 1; } /* This device must be a member of the set */ if (stat(dev, &stb) < 0) return 0; if ((S_IFMT & stb.st_mode) != S_IFBLK) return 0; for (dl = super->disks ; dl ; dl = dl->next) { if (dl->major == (int)major(stb.st_rdev) && dl->minor == (int)minor(stb.st_rdev)) break; } if (!dl) { if (verbose) pr_err("%s is not in the " "same imsm set\n", dev); return 0; } else if (super->orom && dl->index < 0 && mpb->num_raid_devs) { /* If a volume is present then the current creation attempt * cannot incorporate new spares because the orom may not * understand this configuration (all member disks must be * members of each array in the container). */ pr_err("%s is a spare and a volume" " is already defined for this container\n", dev); pr_err("The option-rom requires all member" " disks to be a member of all volumes\n"); return 0; } else if (super->orom && mpb->num_raid_devs > 0 && mpb->num_disks != raiddisks) { pr_err("The option-rom requires all member" " disks to be a member of all volumes\n"); return 0; } /* retrieve the largest free space block */ e = get_extents(super, dl); maxsize = 0; i = 0; if (e) { do { unsigned long long esize; esize = e[i].start - pos; if (esize >= maxsize) maxsize = esize; pos = e[i].start + e[i].size; i++; } while (e[i-1].size); dl->e = e; dl->extent_cnt = i; } else { if (verbose) pr_err("unable to determine free space for: %s\n", dev); return 0; } if (maxsize < size) { if (verbose) pr_err("%s not enough space (%llu < %llu)\n", dev, maxsize, size); return 0; } /* count total number of extents for merge */ i = 0; for (dl = super->disks; dl; dl = dl->next) if (dl->e) i += dl->extent_cnt; maxsize = merge_extents(super, i); if (!check_env("IMSM_NO_PLATFORM") && mpb->num_raid_devs > 0 && size && size != maxsize) { pr_err("attempting to create a second " "volume with size less then remaining space. " "Aborting...\n"); return 0; } if (maxsize < size || maxsize == 0) { if (verbose) { if (maxsize == 0) pr_err("no free space" " left on device. Aborting...\n"); else pr_err("not enough space" " to create volume of given size" " (%llu < %llu). Aborting...\n", maxsize, size); } return 0; } *freesize = maxsize; if (super->orom) { int count = count_volumes(super->hba->path, super->orom->dpa, verbose); if (super->orom->vphba <= count) { pr_vrb(": platform does not support more than %d raid volumes.\n", super->orom->vphba); return 0; } } return 1; } static int imsm_get_free_size(struct supertype *st, int raiddisks, unsigned long long size, int chunk, unsigned long long *freesize) { struct intel_super *super = st->sb; struct imsm_super *mpb = super->anchor; struct dl *dl; int i; int extent_cnt; struct extent *e; unsigned long long maxsize; unsigned long long minsize; int cnt; int used; /* find the largest common start free region of the possible disks */ used = 0; extent_cnt = 0; cnt = 0; for (dl = super->disks; dl; dl = dl->next) { dl->raiddisk = -1; if (dl->index >= 0) used++; /* don't activate new spares if we are orom constrained * and there is already a volume active in the container */ if (super->orom && dl->index < 0 && mpb->num_raid_devs) continue; e = get_extents(super, dl); if (!e) continue; for (i = 1; e[i-1].size; i++) ; dl->e = e; dl->extent_cnt = i; extent_cnt += i; cnt++; } maxsize = merge_extents(super, extent_cnt); minsize = size; if (size == 0) /* chunk is in K */ minsize = chunk * 2; if (cnt < raiddisks || (super->orom && used && used != raiddisks) || maxsize < minsize || maxsize == 0) { pr_err("not enough devices with space to create array.\n"); return 0; /* No enough free spaces large enough */ } if (size == 0) { size = maxsize; if (chunk) { size /= 2 * chunk; size *= 2 * chunk; } maxsize = size; } if (!check_env("IMSM_NO_PLATFORM") && mpb->num_raid_devs > 0 && size && size != maxsize) { pr_err("attempting to create a second " "volume with size less then remaining space. " "Aborting...\n"); return 0; } cnt = 0; for (dl = super->disks; dl; dl = dl->next) if (dl->e) dl->raiddisk = cnt++; *freesize = size; dprintf("imsm: imsm_get_free_size() returns : %llu\n", size); return 1; } static int reserve_space(struct supertype *st, int raiddisks, unsigned long long size, int chunk, unsigned long long *freesize) { struct intel_super *super = st->sb; struct dl *dl; int cnt; int rv = 0; rv = imsm_get_free_size(st, raiddisks, size, chunk, freesize); if (rv) { cnt = 0; for (dl = super->disks; dl; dl = dl->next) if (dl->e) dl->raiddisk = cnt++; rv = 1; } return rv; } static int validate_geometry_imsm(struct supertype *st, int level, int layout, int raiddisks, int *chunk, unsigned long long size, unsigned long long data_offset, char *dev, unsigned long long *freesize, int verbose) { int fd, cfd; struct mdinfo *sra; int is_member = 0; /* load capability * if given unused devices create a container * if given given devices in a container create a member volume */ if (level == LEVEL_CONTAINER) { /* Must be a fresh device to add to a container */ return validate_geometry_imsm_container(st, level, layout, raiddisks, *chunk, size, data_offset, dev, freesize, verbose); } if (!dev) { if (st->sb) { struct intel_super *super = st->sb; if (!validate_geometry_imsm_orom(st->sb, level, layout, raiddisks, chunk, size, verbose)) return 0; /* we are being asked to automatically layout a * new volume based on the current contents of * the container. If the the parameters can be * satisfied reserve_space will record the disks, * start offset, and size of the volume to be * created. add_to_super and getinfo_super * detect when autolayout is in progress. */ /* assuming that freesize is always given when array is created */ if (super->orom && freesize) { int count; count = count_volumes(super->hba->path, super->orom->dpa, verbose); if (super->orom->vphba <= count) { pr_vrb(": platform does not support more" " than %d raid volumes.\n", super->orom->vphba); return 0; } } if (freesize) return reserve_space(st, raiddisks, size, *chunk, freesize); } return 1; } if (st->sb) { /* creating in a given container */ return validate_geometry_imsm_volume(st, level, layout, raiddisks, chunk, size, data_offset, dev, freesize, verbose); } /* This device needs to be a device in an 'imsm' container */ fd = open(dev, O_RDONLY|O_EXCL, 0); if (fd >= 0) { if (verbose) pr_err("Cannot create this array on device %s\n", dev); close(fd); return 0; } if (errno != EBUSY || (fd = open(dev, O_RDONLY, 0)) < 0) { if (verbose) pr_err("Cannot open %s: %s\n", dev, strerror(errno)); return 0; } /* Well, it is in use by someone, maybe an 'imsm' container. */ cfd = open_container(fd); close(fd); if (cfd < 0) { if (verbose) pr_err("Cannot use %s: It is busy\n", dev); return 0; } sra = sysfs_read(cfd, NULL, GET_VERSION); if (sra && sra->array.major_version == -1 && strcmp(sra->text_version, "imsm") == 0) is_member = 1; sysfs_free(sra); if (is_member) { /* This is a member of a imsm container. Load the container * and try to create a volume */ struct intel_super *super; if (load_super_imsm_all(st, cfd, (void **) &super, NULL, NULL, 1) == 0) { st->sb = super; strcpy(st->container_devnm, fd2devnm(cfd)); close(cfd); return validate_geometry_imsm_volume(st, level, layout, raiddisks, chunk, size, data_offset, dev, freesize, 1) ? 1 : -1; } } if (verbose) pr_err("failed container membership check\n"); close(cfd); return 0; } static void default_geometry_imsm(struct supertype *st, int *level, int *layout, int *chunk) { struct intel_super *super = st->sb; if (level && *level == UnSet) *level = LEVEL_CONTAINER; if (level && layout && *layout == UnSet) *layout = imsm_level_to_layout(*level); if (chunk && (*chunk == UnSet || *chunk == 0)) *chunk = imsm_default_chunk(super->orom); } static void handle_missing(struct intel_super *super, struct imsm_dev *dev); static int kill_subarray_imsm(struct supertype *st) { /* remove the subarray currently referenced by ->current_vol */ __u8 i; struct intel_dev **dp; struct intel_super *super = st->sb; __u8 current_vol = super->current_vol; struct imsm_super *mpb = super->anchor; if (super->current_vol < 0) return 2; super->current_vol = -1; /* invalidate subarray cursor */ /* block deletions that would change the uuid of active subarrays * * FIXME when immutable ids are available, but note that we'll * also need to fixup the invalidated/active subarray indexes in * mdstat */ for (i = 0; i < mpb->num_raid_devs; i++) { char subarray[4]; if (i < current_vol) continue; sprintf(subarray, "%u", i); if (is_subarray_active(subarray, st->devnm)) { pr_err("deleting subarray-%d would change the UUID of active subarray-%d, aborting\n", current_vol, i); return 2; } } if (st->update_tail) { struct imsm_update_kill_array *u = xmalloc(sizeof(*u)); u->type = update_kill_array; u->dev_idx = current_vol; append_metadata_update(st, u, sizeof(*u)); return 0; } for (dp = &super->devlist; *dp;) if ((*dp)->index == current_vol) { *dp = (*dp)->next; } else { handle_missing(super, (*dp)->dev); if ((*dp)->index > current_vol) (*dp)->index--; dp = &(*dp)->next; } /* no more raid devices, all active components are now spares, * but of course failed are still failed */ if (--mpb->num_raid_devs == 0) { struct dl *d; for (d = super->disks; d; d = d->next) if (d->index > -2) mark_spare(d); } super->updates_pending++; return 0; } static int update_subarray_imsm(struct supertype *st, char *subarray, char *update, struct mddev_ident *ident) { /* update the subarray currently referenced by ->current_vol */ struct intel_super *super = st->sb; struct imsm_super *mpb = super->anchor; if (strcmp(update, "name") == 0) { char *name = ident->name; char *ep; int vol; if (is_subarray_active(subarray, st->devnm)) { pr_err("Unable to update name of active subarray\n"); return 2; } if (!check_name(super, name, 0)) return 2; vol = strtoul(subarray, &ep, 10); if (*ep != '\0' || vol >= super->anchor->num_raid_devs) return 2; if (st->update_tail) { struct imsm_update_rename_array *u = xmalloc(sizeof(*u)); u->type = update_rename_array; u->dev_idx = vol; snprintf((char *) u->name, MAX_RAID_SERIAL_LEN, "%s", name); append_metadata_update(st, u, sizeof(*u)); } else { struct imsm_dev *dev; int i; dev = get_imsm_dev(super, vol); snprintf((char *) dev->volume, MAX_RAID_SERIAL_LEN, "%s", name); for (i = 0; i < mpb->num_raid_devs; i++) { dev = get_imsm_dev(super, i); handle_missing(super, dev); } super->updates_pending++; } } else return 2; return 0; } #endif /* MDASSEMBLE */ static int is_gen_migration(struct imsm_dev *dev) { if (dev == NULL) return 0; if (!dev->vol.migr_state) return 0; if (migr_type(dev) == MIGR_GEN_MIGR) return 1; return 0; } static int is_rebuilding(struct imsm_dev *dev) { struct imsm_map *migr_map; if (!dev->vol.migr_state) return 0; if (migr_type(dev) != MIGR_REBUILD) return 0; migr_map = get_imsm_map(dev, MAP_1); if (migr_map->map_state == IMSM_T_STATE_DEGRADED) return 1; else return 0; } #ifndef MDASSEMBLE static int is_initializing(struct imsm_dev *dev) { struct imsm_map *migr_map; if (!dev->vol.migr_state) return 0; if (migr_type(dev) != MIGR_INIT) return 0; migr_map = get_imsm_map(dev, MAP_1); if (migr_map->map_state == IMSM_T_STATE_UNINITIALIZED) return 1; return 0; } #endif static void update_recovery_start(struct intel_super *super, struct imsm_dev *dev, struct mdinfo *array) { struct mdinfo *rebuild = NULL; struct mdinfo *d; __u32 units; if (!is_rebuilding(dev)) return; /* Find the rebuild target, but punt on the dual rebuild case */ for (d = array->devs; d; d = d->next) if (d->recovery_start == 0) { if (rebuild) return; rebuild = d; } if (!rebuild) { /* (?) none of the disks are marked with * IMSM_ORD_REBUILD, so assume they are missing and the * disk_ord_tbl was not correctly updated */ dprintf("%s: failed to locate out-of-sync disk\n", __func__); return; } units = __le32_to_cpu(dev->vol.curr_migr_unit); rebuild->recovery_start = units * blocks_per_migr_unit(super, dev); } #ifndef MDASSEMBLE static int recover_backup_imsm(struct supertype *st, struct mdinfo *info); #endif static struct mdinfo *container_content_imsm(struct supertype *st, char *subarray) { /* Given a container loaded by load_super_imsm_all, * extract information about all the arrays into * an mdinfo tree. * If 'subarray' is given, just extract info about that array. * * For each imsm_dev create an mdinfo, fill it in, * then look for matching devices in super->disks * and create appropriate device mdinfo. */ struct intel_super *super = st->sb; struct imsm_super *mpb = super->anchor; struct mdinfo *rest = NULL; unsigned int i; int sb_errors = 0; struct dl *d; int spare_disks = 0; /* do not assemble arrays when not all attributes are supported */ if (imsm_check_attributes(mpb->attributes) == 0) { sb_errors = 1; pr_err("Unsupported attributes in IMSM metadata." "Arrays activation is blocked.\n"); } /* check for bad blocks */ if (imsm_bbm_log_size(super->anchor)) { pr_err("BBM log found in IMSM metadata." "Arrays activation is blocked.\n"); sb_errors = 1; } /* count spare devices, not used in maps */ for (d = super->disks; d; d = d->next) if (d->index == -1) spare_disks++; for (i = 0; i < mpb->num_raid_devs; i++) { struct imsm_dev *dev; struct imsm_map *map; struct imsm_map *map2; struct mdinfo *this; int slot; #ifndef MDASSEMBLE int chunk; #endif char *ep; if (subarray && (i != strtoul(subarray, &ep, 10) || *ep != '\0')) continue; dev = get_imsm_dev(super, i); map = get_imsm_map(dev, MAP_0); map2 = get_imsm_map(dev, MAP_1); /* do not publish arrays that are in the middle of an * unsupported migration */ if (dev->vol.migr_state && (migr_type(dev) == MIGR_STATE_CHANGE)) { pr_err("cannot assemble volume '%.16s':" " unsupported migration in progress\n", dev->volume); continue; } /* do not publish arrays that are not support by controller's * OROM/EFI */ this = xmalloc(sizeof(*this)); super->current_vol = i; getinfo_super_imsm_volume(st, this, NULL); this->next = rest; #ifndef MDASSEMBLE chunk = __le16_to_cpu(map->blocks_per_strip) >> 1; /* mdadm does not support all metadata features- set the bit in all arrays state */ if (!validate_geometry_imsm_orom(super, get_imsm_raid_level(map), /* RAID level */ imsm_level_to_layout(get_imsm_raid_level(map)), map->num_members, /* raid disks */ &chunk, join_u32(dev->size_low, dev->size_high), 1 /* verbose */)) { pr_err("IMSM RAID geometry validation" " failed. Array %s activation is blocked.\n", dev->volume); this->array.state |= (1<<MD_SB_BLOCK_CONTAINER_RESHAPE) | (1<<MD_SB_BLOCK_VOLUME); } #endif /* if array has bad blocks, set suitable bit in all arrays state */ if (sb_errors) this->array.state |= (1<<MD_SB_BLOCK_CONTAINER_RESHAPE) | (1<<MD_SB_BLOCK_VOLUME); for (slot = 0 ; slot < map->num_members; slot++) { unsigned long long recovery_start; struct mdinfo *info_d; struct dl *d; int idx; int skip; __u32 ord; skip = 0; idx = get_imsm_disk_idx(dev, slot, MAP_0); ord = get_imsm_ord_tbl_ent(dev, slot, MAP_X); for (d = super->disks; d ; d = d->next) if (d->index == idx) break; recovery_start = MaxSector; if (d == NULL) skip = 1; if (d && is_failed(&d->disk)) skip = 1; if (ord & IMSM_ORD_REBUILD) recovery_start = 0; /* * if we skip some disks the array will be assmebled degraded; * reset resync start to avoid a dirty-degraded * situation when performing the intial sync * * FIXME handle dirty degraded */ if ((skip || recovery_start == 0) && !dev->vol.dirty) this->resync_start = MaxSector; if (skip) continue; info_d = xcalloc(1, sizeof(*info_d)); info_d->next = this->devs; this->devs = info_d; info_d->disk.number = d->index; info_d->disk.major = d->major; info_d->disk.minor = d->minor; info_d->disk.raid_disk = slot; info_d->recovery_start = recovery_start; if (map2) { if (slot < map2->num_members) info_d->disk.state = (1 << MD_DISK_ACTIVE); else this->array.spare_disks++; } else { if (slot < map->num_members) info_d->disk.state = (1 << MD_DISK_ACTIVE); else this->array.spare_disks++; } if (info_d->recovery_start == MaxSector) this->array.working_disks++; info_d->events = __le32_to_cpu(mpb->generation_num); info_d->data_offset = pba_of_lba0(map); info_d->component_size = blocks_per_member(map); } /* now that the disk list is up-to-date fixup recovery_start */ update_recovery_start(super, dev, this); this->array.spare_disks += spare_disks; #ifndef MDASSEMBLE /* check for reshape */ if (this->reshape_active == 1) recover_backup_imsm(st, this); #endif rest = this; } return rest; } static __u8 imsm_check_degraded(struct intel_super *super, struct imsm_dev *dev, int failed, int look_in_map) { struct imsm_map *map; map = get_imsm_map(dev, look_in_map); if (!failed) return map->map_state == IMSM_T_STATE_UNINITIALIZED ? IMSM_T_STATE_UNINITIALIZED : IMSM_T_STATE_NORMAL; switch (get_imsm_raid_level(map)) { case 0: return IMSM_T_STATE_FAILED; break; case 1: if (failed < map->num_members) return IMSM_T_STATE_DEGRADED; else return IMSM_T_STATE_FAILED; break; case 10: { /** * check to see if any mirrors have failed, otherwise we * are degraded. Even numbered slots are mirrored on * slot+1 */ int i; /* gcc -Os complains that this is unused */ int insync = insync; for (i = 0; i < map->num_members; i++) { __u32 ord = get_imsm_ord_tbl_ent(dev, i, MAP_X); int idx = ord_to_idx(ord); struct imsm_disk *disk; /* reset the potential in-sync count on even-numbered * slots. num_copies is always 2 for imsm raid10 */ if ((i & 1) == 0) insync = 2; disk = get_imsm_disk(super, idx); if (!disk || is_failed(disk) || ord & IMSM_ORD_REBUILD) insync--; /* no in-sync disks left in this mirror the * array has failed */ if (insync == 0) return IMSM_T_STATE_FAILED; } return IMSM_T_STATE_DEGRADED; } case 5: if (failed < 2) return IMSM_T_STATE_DEGRADED; else return IMSM_T_STATE_FAILED; break; default: break; } return map->map_state; } static int imsm_count_failed(struct intel_super *super, struct imsm_dev *dev, int look_in_map) { int i; int failed = 0; struct imsm_disk *disk; struct imsm_map *map = get_imsm_map(dev, MAP_0); struct imsm_map *prev = get_imsm_map(dev, MAP_1); struct imsm_map *map_for_loop; __u32 ord; int idx; int idx_1; /* at the beginning of migration we set IMSM_ORD_REBUILD on * disks that are being rebuilt. New failures are recorded to * map[0]. So we look through all the disks we started with and * see if any failures are still present, or if any new ones * have arrived */ map_for_loop = map; if (prev && (map->num_members < prev->num_members)) map_for_loop = prev; for (i = 0; i < map_for_loop->num_members; i++) { idx_1 = -255; /* when MAP_X is passed both maps failures are counted */ if (prev && ((look_in_map == MAP_1) || (look_in_map == MAP_X)) && (i < prev->num_members)) { ord = __le32_to_cpu(prev->disk_ord_tbl[i]); idx_1 = ord_to_idx(ord); disk = get_imsm_disk(super, idx_1); if (!disk || is_failed(disk) || ord & IMSM_ORD_REBUILD) failed++; } if (((look_in_map == MAP_0) || (look_in_map == MAP_X)) && (i < map->num_members)) { ord = __le32_to_cpu(map->disk_ord_tbl[i]); idx = ord_to_idx(ord); if (idx != idx_1) { disk = get_imsm_disk(super, idx); if (!disk || is_failed(disk) || ord & IMSM_ORD_REBUILD) failed++; } } } return failed; } #ifndef MDASSEMBLE static int imsm_open_new(struct supertype *c, struct active_array *a, char *inst) { struct intel_super *super = c->sb; struct imsm_super *mpb = super->anchor; if (atoi(inst) >= mpb->num_raid_devs) { pr_err("%s: subarry index %d, out of range\n", __func__, atoi(inst)); return -ENODEV; } dprintf("imsm: open_new %s\n", inst); a->info.container_member = atoi(inst); return 0; } static int is_resyncing(struct imsm_dev *dev) { struct imsm_map *migr_map; if (!dev->vol.migr_state) return 0; if (migr_type(dev) == MIGR_INIT || migr_type(dev) == MIGR_REPAIR) return 1; if (migr_type(dev) == MIGR_GEN_MIGR) return 0; migr_map = get_imsm_map(dev, MAP_1); if ((migr_map->map_state == IMSM_T_STATE_NORMAL) && (dev->vol.migr_type != MIGR_GEN_MIGR)) return 1; else return 0; } /* return true if we recorded new information */ static int mark_failure(struct imsm_dev *dev, struct imsm_disk *disk, int idx) { __u32 ord; int slot; struct imsm_map *map; char buf[MAX_RAID_SERIAL_LEN+3]; unsigned int len, shift = 0; /* new failures are always set in map[0] */ map = get_imsm_map(dev, MAP_0); slot = get_imsm_disk_slot(map, idx); if (slot < 0) return 0; ord = __le32_to_cpu(map->disk_ord_tbl[slot]); if (is_failed(disk) && (ord & IMSM_ORD_REBUILD)) return 0; memcpy(buf, disk->serial, MAX_RAID_SERIAL_LEN); buf[MAX_RAID_SERIAL_LEN] = '\000'; strcat(buf, ":0"); if ((len = strlen(buf)) >= MAX_RAID_SERIAL_LEN) shift = len - MAX_RAID_SERIAL_LEN + 1; strncpy((char *)disk->serial, &buf[shift], MAX_RAID_SERIAL_LEN); disk->status |= FAILED_DISK; set_imsm_ord_tbl_ent(map, slot, idx | IMSM_ORD_REBUILD); /* mark failures in second map if second map exists and this disk * in this slot. * This is valid for migration, initialization and rebuild */ if (dev->vol.migr_state) { struct imsm_map *map2 = get_imsm_map(dev, MAP_1); int slot2 = get_imsm_disk_slot(map2, idx); if ((slot2 < map2->num_members) && (slot2 >= 0)) set_imsm_ord_tbl_ent(map2, slot2, idx | IMSM_ORD_REBUILD); } if (map->failed_disk_num == 0xff) map->failed_disk_num = slot; return 1; } static void mark_missing(struct imsm_dev *dev, struct imsm_disk *disk, int idx) { mark_failure(dev, disk, idx); if (disk->scsi_id == __cpu_to_le32(~(__u32)0)) return; disk->scsi_id = __cpu_to_le32(~(__u32)0); memmove(&disk->serial[0], &disk->serial[1], MAX_RAID_SERIAL_LEN - 1); } static void handle_missing(struct intel_super *super, struct imsm_dev *dev) { struct dl *dl; if (!super->missing) return; /* When orom adds replacement for missing disk it does * not remove entry of missing disk, but just updates map with * new added disk. So it is not enough just to test if there is * any missing disk, we have to look if there are any failed disks * in map to stop migration */ dprintf("imsm: mark missing\n"); /* end process for initialization and rebuild only */ if (is_gen_migration(dev) == 0) { __u8 map_state; int failed; failed = imsm_count_failed(super, dev, MAP_0); map_state = imsm_check_degraded(super, dev, failed, MAP_0); if (failed) end_migration(dev, super, map_state); } for (dl = super->missing; dl; dl = dl->next) mark_missing(dev, &dl->disk, dl->index); super->updates_pending++; } static unsigned long long imsm_set_array_size(struct imsm_dev *dev, long long new_size) { int used_disks = imsm_num_data_members(dev, MAP_0); unsigned long long array_blocks; struct imsm_map *map; if (used_disks == 0) { /* when problems occures * return current array_blocks value */ array_blocks = __le32_to_cpu(dev->size_high); array_blocks = array_blocks << 32; array_blocks += __le32_to_cpu(dev->size_low); return array_blocks; } /* set array size in metadata */ if (new_size <= 0) { /* OLCE size change is caused by added disks */ map = get_imsm_map(dev, MAP_0); array_blocks = blocks_per_member(map) * used_disks; } else { /* Online Volume Size Change * Using available free space */ array_blocks = new_size; } /* round array size down to closest MB */ array_blocks = (array_blocks >> SECT_PER_MB_SHIFT) << SECT_PER_MB_SHIFT; dev->size_low = __cpu_to_le32((__u32)array_blocks); dev->size_high = __cpu_to_le32((__u32)(array_blocks >> 32)); return array_blocks; } static void imsm_set_disk(struct active_array *a, int n, int state); static void imsm_progress_container_reshape(struct intel_super *super) { /* if no device has a migr_state, but some device has a * different number of members than the previous device, start * changing the number of devices in this device to match * previous. */ struct imsm_super *mpb = super->anchor; int prev_disks = -1; int i; int copy_map_size; for (i = 0; i < mpb->num_raid_devs; i++) { struct imsm_dev *dev = get_imsm_dev(super, i); struct imsm_map *map = get_imsm_map(dev, MAP_0); struct imsm_map *map2; int prev_num_members; if (dev->vol.migr_state) return; if (prev_disks == -1) prev_disks = map->num_members; if (prev_disks == map->num_members) continue; /* OK, this array needs to enter reshape mode. * i.e it needs a migr_state */ copy_map_size = sizeof_imsm_map(map); prev_num_members = map->num_members; map->num_members = prev_disks; dev->vol.migr_state = 1; dev->vol.curr_migr_unit = 0; set_migr_type(dev, MIGR_GEN_MIGR); for (i = prev_num_members; i < map->num_members; i++) set_imsm_ord_tbl_ent(map, i, i); map2 = get_imsm_map(dev, MAP_1); /* Copy the current map */ memcpy(map2, map, copy_map_size); map2->num_members = prev_num_members; imsm_set_array_size(dev, -1); super->clean_migration_record_by_mdmon = 1; super->updates_pending++; } } /* Handle dirty -> clean transititions, resync and reshape. Degraded and rebuild * states are handled in imsm_set_disk() with one exception, when a * resync is stopped due to a new failure this routine will set the * 'degraded' state for the array. */ static int imsm_set_array_state(struct active_array *a, int consistent) { int inst = a->info.container_member; struct intel_super *super = a->container->sb; struct imsm_dev *dev = get_imsm_dev(super, inst); struct imsm_map *map = get_imsm_map(dev, MAP_0); int failed = imsm_count_failed(super, dev, MAP_0); __u8 map_state = imsm_check_degraded(super, dev, failed, MAP_0); __u32 blocks_per_unit; if (dev->vol.migr_state && dev->vol.migr_type == MIGR_GEN_MIGR) { /* array state change is blocked due to reshape action * We might need to * - abort the reshape (if last_checkpoint is 0 and action!= reshape) * - finish the reshape (if last_checkpoint is big and action != reshape) * - update curr_migr_unit */ if (a->curr_action == reshape) { /* still reshaping, maybe update curr_migr_unit */ goto mark_checkpoint; } else { if (a->last_checkpoint == 0 && a->prev_action == reshape) { /* for some reason we aborted the reshape. * * disable automatic metadata rollback * user action is required to recover process */ if (0) { struct imsm_map *map2 = get_imsm_map(dev, MAP_1); dev->vol.migr_state = 0; set_migr_type(dev, 0); dev->vol.curr_migr_unit = 0; memcpy(map, map2, sizeof_imsm_map(map2)); super->updates_pending++; } } if (a->last_checkpoint >= a->info.component_size) { unsigned long long array_blocks; int used_disks; struct mdinfo *mdi; used_disks = imsm_num_data_members(dev, MAP_0); if (used_disks > 0) { array_blocks = blocks_per_member(map) * used_disks; /* round array size down to closest MB */ array_blocks = (array_blocks >> SECT_PER_MB_SHIFT) << SECT_PER_MB_SHIFT; a->info.custom_array_size = array_blocks; /* encourage manager to update array * size */ a->check_reshape = 1; } /* finalize online capacity expansion/reshape */ for (mdi = a->info.devs; mdi; mdi = mdi->next) imsm_set_disk(a, mdi->disk.raid_disk, mdi->curr_state); imsm_progress_container_reshape(super); } } } /* before we activate this array handle any missing disks */ if (consistent == 2) handle_missing(super, dev); if (consistent == 2 && (!is_resync_complete(&a->info) || map_state != IMSM_T_STATE_NORMAL || dev->vol.migr_state)) consistent = 0; if (is_resync_complete(&a->info)) { /* complete intialization / resync, * recovery and interrupted recovery is completed in * ->set_disk */ if (is_resyncing(dev)) { dprintf("imsm: mark resync done\n"); end_migration(dev, super, map_state); super->updates_pending++; a->last_checkpoint = 0; } } else if ((!is_resyncing(dev) && !failed) && (imsm_reshape_blocks_arrays_changes(super) == 0)) { /* mark the start of the init process if nothing is failed */ dprintf("imsm: mark resync start\n"); if (map->map_state == IMSM_T_STATE_UNINITIALIZED) migrate(dev, super, IMSM_T_STATE_NORMAL, MIGR_INIT); else migrate(dev, super, IMSM_T_STATE_NORMAL, MIGR_REPAIR); super->updates_pending++; } mark_checkpoint: /* skip checkpointing for general migration, * it is controlled in mdadm */ if (is_gen_migration(dev)) goto skip_mark_checkpoint; /* check if we can update curr_migr_unit from resync_start, recovery_start */ blocks_per_unit = blocks_per_migr_unit(super, dev); if (blocks_per_unit) { __u32 units32; __u64 units; units = a->last_checkpoint / blocks_per_unit; units32 = units; /* check that we did not overflow 32-bits, and that * curr_migr_unit needs updating */ if (units32 == units && units32 != 0 && __le32_to_cpu(dev->vol.curr_migr_unit) != units32) { dprintf("imsm: mark checkpoint (%u)\n", units32); dev->vol.curr_migr_unit = __cpu_to_le32(units32); super->updates_pending++; } } skip_mark_checkpoint: /* mark dirty / clean */ if (dev->vol.dirty != !consistent) { dprintf("imsm: mark '%s'\n", consistent ? "clean" : "dirty"); if (consistent) dev->vol.dirty = 0; else dev->vol.dirty = 1; super->updates_pending++; } return consistent; } static void imsm_set_disk(struct active_array *a, int n, int state) { int inst = a->info.container_member; struct intel_super *super = a->container->sb; struct imsm_dev *dev = get_imsm_dev(super, inst); struct imsm_map *map = get_imsm_map(dev, MAP_0); struct imsm_disk *disk; struct mdinfo *mdi; int recovery_not_finished = 0; int failed; __u32 ord; __u8 map_state; if (n > map->num_members) pr_err("imsm: set_disk %d out of range 0..%d\n", n, map->num_members - 1); if (n < 0) return; dprintf("imsm: set_disk %d:%x\n", n, state); ord = get_imsm_ord_tbl_ent(dev, n, MAP_0); disk = get_imsm_disk(super, ord_to_idx(ord)); /* check for new failures */ if (state & DS_FAULTY) { if (mark_failure(dev, disk, ord_to_idx(ord))) super->updates_pending++; } /* check if in_sync */ if (state & DS_INSYNC && ord & IMSM_ORD_REBUILD && is_rebuilding(dev)) { struct imsm_map *migr_map = get_imsm_map(dev, MAP_1); set_imsm_ord_tbl_ent(migr_map, n, ord_to_idx(ord)); super->updates_pending++; } failed = imsm_count_failed(super, dev, MAP_0); map_state = imsm_check_degraded(super, dev, failed, MAP_0); /* check if recovery complete, newly degraded, or failed */ dprintf("imsm: Detected transition to state "); switch (map_state) { case IMSM_T_STATE_NORMAL: /* transition to normal state */ dprintf("normal: "); if (is_rebuilding(dev)) { dprintf("while rebuilding"); /* check if recovery is really finished */ for (mdi = a->info.devs; mdi ; mdi = mdi->next) if (mdi->recovery_start != MaxSector) { recovery_not_finished = 1; break; } if (recovery_not_finished) { dprintf("\nimsm: Rebuild has not finished yet, " "state not changed"); if (a->last_checkpoint < mdi->recovery_start) { a->last_checkpoint = mdi->recovery_start; super->updates_pending++; } break; } end_migration(dev, super, map_state); map = get_imsm_map(dev, MAP_0); map->failed_disk_num = ~0; super->updates_pending++; a->last_checkpoint = 0; break; } if (is_gen_migration(dev)) { dprintf("while general migration"); if (a->last_checkpoint >= a->info.component_size) end_migration(dev, super, map_state); else map->map_state = map_state; map = get_imsm_map(dev, MAP_0); map->failed_disk_num = ~0; super->updates_pending++; break; } break; case IMSM_T_STATE_DEGRADED: /* transition to degraded state */ dprintf("degraded: "); if ((map->map_state != map_state) && !dev->vol.migr_state) { dprintf("mark degraded"); map->map_state = map_state; super->updates_pending++; a->last_checkpoint = 0; break; } if (is_rebuilding(dev)) { dprintf("while rebuilding."); if (map->map_state != map_state) { dprintf(" Map state change"); end_migration(dev, super, map_state); super->updates_pending++; } break; } if (is_gen_migration(dev)) { dprintf("while general migration"); if (a->last_checkpoint >= a->info.component_size) end_migration(dev, super, map_state); else { map->map_state = map_state; manage_second_map(super, dev); } super->updates_pending++; break; } if (is_initializing(dev)) { dprintf("while initialization."); map->map_state = map_state; super->updates_pending++; break; } break; case IMSM_T_STATE_FAILED: /* transition to failed state */ dprintf("failed: "); if (is_gen_migration(dev)) { dprintf("while general migration"); map->map_state = map_state; super->updates_pending++; break; } if (map->map_state != map_state) { dprintf("mark failed"); end_migration(dev, super, map_state); super->updates_pending++; a->last_checkpoint = 0; break; } break; default: dprintf("state %i\n", map_state); } dprintf("\n"); } static int store_imsm_mpb(int fd, struct imsm_super *mpb) { void *buf = mpb; __u32 mpb_size = __le32_to_cpu(mpb->mpb_size); unsigned long long dsize; unsigned long long sectors; get_dev_size(fd, NULL, &dsize); if (mpb_size > 512) { /* -1 to account for anchor */ sectors = mpb_sectors(mpb) - 1; /* write the extended mpb to the sectors preceeding the anchor */ if (lseek64(fd, dsize - (512 * (2 + sectors)), SEEK_SET) < 0) return 1; if ((unsigned long long)write(fd, buf + 512, 512 * sectors) != 512 * sectors) return 1; } /* first block is stored on second to last sector of the disk */ if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0) return 1; if (write(fd, buf, 512) != 512) return 1; return 0; } static void imsm_sync_metadata(struct supertype *container) { struct intel_super *super = container->sb; dprintf("sync metadata: %d\n", super->updates_pending); if (!super->updates_pending) return; write_super_imsm(container, 0); super->updates_pending = 0; } static struct dl *imsm_readd(struct intel_super *super, int idx, struct active_array *a) { struct imsm_dev *dev = get_imsm_dev(super, a->info.container_member); int i = get_imsm_disk_idx(dev, idx, MAP_X); struct dl *dl; for (dl = super->disks; dl; dl = dl->next) if (dl->index == i) break; if (dl && is_failed(&dl->disk)) dl = NULL; if (dl) dprintf("%s: found %x:%x\n", __func__, dl->major, dl->minor); return dl; } static struct dl *imsm_add_spare(struct intel_super *super, int slot, struct active_array *a, int activate_new, struct mdinfo *additional_test_list) { struct imsm_dev *dev = get_imsm_dev(super, a->info.container_member); int idx = get_imsm_disk_idx(dev, slot, MAP_X); struct imsm_super *mpb = super->anchor; struct imsm_map *map; unsigned long long pos; struct mdinfo *d; struct extent *ex; int i, j; int found; __u32 array_start = 0; __u32 array_end = 0; struct dl *dl; struct mdinfo *test_list; for (dl = super->disks; dl; dl = dl->next) { /* If in this array, skip */ for (d = a->info.devs ; d ; d = d->next) if (d->state_fd >= 0 && d->disk.major == dl->major && d->disk.minor == dl->minor) { dprintf("%x:%x already in array\n", dl->major, dl->minor); break; } if (d) continue; test_list = additional_test_list; while (test_list) { if (test_list->disk.major == dl->major && test_list->disk.minor == dl->minor) { dprintf("%x:%x already in additional test list\n", dl->major, dl->minor); break; } test_list = test_list->next; } if (test_list) continue; /* skip in use or failed drives */ if (is_failed(&dl->disk) || idx == dl->index || dl->index == -2) { dprintf("%x:%x status (failed: %d index: %d)\n", dl->major, dl->minor, is_failed(&dl->disk), idx); continue; } /* skip pure spares when we are looking for partially * assimilated drives */ if (dl->index == -1 && !activate_new) continue; /* Does this unused device have the requisite free space? * It needs to be able to cover all member volumes */ ex = get_extents(super, dl); if (!ex) { dprintf("cannot get extents\n"); continue; } for (i = 0; i < mpb->num_raid_devs; i++) { dev = get_imsm_dev(super, i); map = get_imsm_map(dev, MAP_0); /* check if this disk is already a member of * this array */ if (get_imsm_disk_slot(map, dl->index) >= 0) continue; found = 0; j = 0; pos = 0; array_start = pba_of_lba0(map); array_end = array_start + blocks_per_member(map) - 1; do { /* check that we can start at pba_of_lba0 with * blocks_per_member of space */ if (array_start >= pos && array_end < ex[j].start) { found = 1; break; } pos = ex[j].start + ex[j].size; j++; } while (ex[j-1].size); if (!found) break; } free(ex); if (i < mpb->num_raid_devs) { dprintf("%x:%x does not have %u to %u available\n", dl->major, dl->minor, array_start, array_end); /* No room */ continue; } return dl; } return dl; } static int imsm_rebuild_allowed(struct supertype *cont, int dev_idx, int failed) { struct imsm_dev *dev2; struct imsm_map *map; struct dl *idisk; int slot; int idx; __u8 state; dev2 = get_imsm_dev(cont->sb, dev_idx); if (dev2) { state = imsm_check_degraded(cont->sb, dev2, failed, MAP_0); if (state == IMSM_T_STATE_FAILED) { map = get_imsm_map(dev2, MAP_0); if (!map) return 1; for (slot = 0; slot < map->num_members; slot++) { /* * Check if failed disks are deleted from intel * disk list or are marked to be deleted */ idx = get_imsm_disk_idx(dev2, slot, MAP_X); idisk = get_imsm_dl_disk(cont->sb, idx); /* * Do not rebuild the array if failed disks * from failed sub-array are not removed from * container. */ if (idisk && is_failed(&idisk->disk) && (idisk->action != DISK_REMOVE)) return 0; } } } return 1; } static struct mdinfo *imsm_activate_spare(struct active_array *a, struct metadata_update **updates) { /** * Find a device with unused free space and use it to replace a * failed/vacant region in an array. We replace failed regions one a * array at a time. The result is that a new spare disk will be added * to the first failed array and after the monitor has finished * propagating failures the remainder will be consumed. * * FIXME add a capability for mdmon to request spares from another * container. */ struct intel_super *super = a->container->sb; int inst = a->info.container_member; struct imsm_dev *dev = get_imsm_dev(super, inst); struct imsm_map *map = get_imsm_map(dev, MAP_0); int failed = a->info.array.raid_disks; struct mdinfo *rv = NULL; struct mdinfo *d; struct mdinfo *di; struct metadata_update *mu; struct dl *dl; struct imsm_update_activate_spare *u; int num_spares = 0; int i; int allowed; for (d = a->info.devs ; d ; d = d->next) { if ((d->curr_state & DS_FAULTY) && d->state_fd >= 0) /* wait for Removal to happen */ return NULL; if (d->state_fd >= 0) failed--; } dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n", inst, failed, a->info.array.raid_disks, a->info.array.level); if (imsm_reshape_blocks_arrays_changes(super)) return NULL; /* Cannot activate another spare if rebuild is in progress already */ if (is_rebuilding(dev)) { dprintf("imsm: No spare activation allowed. " "Rebuild in progress already.\n"); return NULL; } if (a->info.array.level == 4) /* No repair for takeovered array * imsm doesn't support raid4 */ return NULL; if (imsm_check_degraded(super, dev, failed, MAP_0) != IMSM_T_STATE_DEGRADED) return NULL; /* * If there are any failed disks check state of the other volume. * Block rebuild if the another one is failed until failed disks * are removed from container. */ if (failed) { dprintf("found failed disks in %.*s, check if there another" "failed sub-array.\n", MAX_RAID_SERIAL_LEN, dev->volume); /* check if states of the other volumes allow for rebuild */ for (i = 0; i < super->anchor->num_raid_devs; i++) { if (i != inst) { allowed = imsm_rebuild_allowed(a->container, i, failed); if (!allowed) return NULL; } } } /* For each slot, if it is not working, find a spare */ for (i = 0; i < a->info.array.raid_disks; i++) { for (d = a->info.devs ; d ; d = d->next) if (d->disk.raid_disk == i) break; dprintf("found %d: %p %x\n", i, d, d?d->curr_state:0); if (d && (d->state_fd >= 0)) continue; /* * OK, this device needs recovery. Try to re-add the * previous occupant of this slot, if this fails see if * we can continue the assimilation of a spare that was * partially assimilated, finally try to activate a new * spare. */ dl = imsm_readd(super, i, a); if (!dl) dl = imsm_add_spare(super, i, a, 0, rv); if (!dl) dl = imsm_add_spare(super, i, a, 1, rv); if (!dl) continue; /* found a usable disk with enough space */ di = xcalloc(1, sizeof(*di)); /* dl->index will be -1 in the case we are activating a * pristine spare. imsm_process_update() will create a * new index in this case. Once a disk is found to be * failed in all member arrays it is kicked from the * metadata */ di->disk.number = dl->index; /* (ab)use di->devs to store a pointer to the device * we chose */ di->devs = (struct mdinfo *) dl; di->disk.raid_disk = i; di->disk.major = dl->major; di->disk.minor = dl->minor; di->disk.state = 0; di->recovery_start = 0; di->data_offset = pba_of_lba0(map); di->component_size = a->info.component_size; di->container_member = inst; super->random = random32(); di->next = rv; rv = di; num_spares++; dprintf("%x:%x to be %d at %llu\n", dl->major, dl->minor, i, di->data_offset); } if (!rv) /* No spares found */ return rv; /* Now 'rv' has a list of devices to return. * Create a metadata_update record to update the * disk_ord_tbl for the array */ mu = xmalloc(sizeof(*mu)); mu->buf = xcalloc(num_spares, sizeof(struct imsm_update_activate_spare)); mu->space = NULL; mu->space_list = NULL; mu->len = sizeof(struct imsm_update_activate_spare) * num_spares; mu->next = *updates; u = (struct imsm_update_activate_spare *) mu->buf; for (di = rv ; di ; di = di->next) { u->type = update_activate_spare; u->dl = (struct dl *) di->devs; di->devs = NULL; u->slot = di->disk.raid_disk; u->array = inst; u->next = u + 1; u++; } (u-1)->next = NULL; *updates = mu; return rv; } static int disks_overlap(struct intel_super *super, int idx, struct imsm_update_create_array *u) { struct imsm_dev *dev = get_imsm_dev(super, idx); struct imsm_map *map = get_imsm_map(dev, MAP_0); struct imsm_map *new_map = get_imsm_map(&u->dev, MAP_0); struct disk_info *inf = get_disk_info(u); struct imsm_disk *disk; int i; int j; for (i = 0; i < map->num_members; i++) { disk = get_imsm_disk(super, get_imsm_disk_idx(dev, i, MAP_X)); for (j = 0; j < new_map->num_members; j++) if (serialcmp(disk->serial, inf[j].serial) == 0) return 1; } return 0; } static struct dl *get_disk_super(struct intel_super *super, int major, int minor) { struct dl *dl = NULL; for (dl = super->disks; dl; dl = dl->next) if ((dl->major == major) && (dl->minor == minor)) return dl; return NULL; } static int remove_disk_super(struct intel_super *super, int major, int minor) { struct dl *prev = NULL; struct dl *dl; prev = NULL; for (dl = super->disks; dl; dl = dl->next) { if ((dl->major == major) && (dl->minor == minor)) { /* remove */ if (prev) prev->next = dl->next; else super->disks = dl->next; dl->next = NULL; __free_imsm_disk(dl); dprintf("%s: removed %x:%x\n", __func__, major, minor); break; } prev = dl; } return 0; } static void imsm_delete(struct intel_super *super, struct dl **dlp, unsigned index); static int add_remove_disk_update(struct intel_super *super) { int check_degraded = 0; struct dl *disk = NULL; /* add/remove some spares to/from the metadata/contrainer */ while (super->disk_mgmt_list) { struct dl *disk_cfg; disk_cfg = super->disk_mgmt_list; super->disk_mgmt_list = disk_cfg->next; disk_cfg->next = NULL; if (disk_cfg->action == DISK_ADD) { disk_cfg->next = super->disks; super->disks = disk_cfg; check_degraded = 1; dprintf("%s: added %x:%x\n", __func__, disk_cfg->major, disk_cfg->minor); } else if (disk_cfg->action == DISK_REMOVE) { dprintf("Disk remove action processed: %x.%x\n", disk_cfg->major, disk_cfg->minor); disk = get_disk_super(super, disk_cfg->major, disk_cfg->minor); if (disk) { /* store action status */ disk->action = DISK_REMOVE; /* remove spare disks only */ if (disk->index == -1) { remove_disk_super(super, disk_cfg->major, disk_cfg->minor); } } /* release allocate disk structure */ __free_imsm_disk(disk_cfg); } } return check_degraded; } static int apply_reshape_migration_update(struct imsm_update_reshape_migration *u, struct intel_super *super, void ***space_list) { struct intel_dev *id; void **tofree = NULL; int ret_val = 0; dprintf("apply_reshape_migration_update()\n"); if ((u->subdev < 0) || (u->subdev > 1)) { dprintf("imsm: Error: Wrong subdev: %i\n", u->subdev); return ret_val; } if ((space_list == NULL) || (*space_list == NULL)) { dprintf("imsm: Error: Memory is not allocated\n"); return ret_val; } for (id = super->devlist ; id; id = id->next) { if (id->index == (unsigned)u->subdev) { struct imsm_dev *dev = get_imsm_dev(super, u->subdev); struct imsm_map *map; struct imsm_dev *new_dev = (struct imsm_dev *)*space_list; struct imsm_map *migr_map = get_imsm_map(dev, MAP_1); int to_state; struct dl *new_disk; if (new_dev == NULL) return ret_val; *space_list = **space_list; memcpy(new_dev, dev, sizeof_imsm_dev(dev, 0)); map = get_imsm_map(new_dev, MAP_0); if (migr_map) { dprintf("imsm: Error: migration in progress"); return ret_val; } to_state = map->map_state; if ((u->new_level == 5) && (map->raid_level == 0)) { map->num_members++; /* this should not happen */ if (u->new_disks[0] < 0) { map->failed_disk_num = map->num_members - 1; to_state = IMSM_T_STATE_DEGRADED; } else to_state = IMSM_T_STATE_NORMAL; } migrate(new_dev, super, to_state, MIGR_GEN_MIGR); if (u->new_level > -1) map->raid_level = u->new_level; migr_map = get_imsm_map(new_dev, MAP_1); if ((u->new_level == 5) && (migr_map->raid_level == 0)) { int ord = map->num_members - 1; migr_map->num_members--; if (u->new_disks[0] < 0) ord |= IMSM_ORD_REBUILD; set_imsm_ord_tbl_ent(map, map->num_members - 1, ord); } id->dev = new_dev; tofree = (void **)dev; /* update chunk size */ if (u->new_chunksize > 0) map->blocks_per_strip = __cpu_to_le16(u->new_chunksize * 2); /* add disk */ if ((u->new_level != 5) || (migr_map->raid_level != 0) || (migr_map->raid_level == map->raid_level)) goto skip_disk_add; if (u->new_disks[0] >= 0) { /* use passes spare */ new_disk = get_disk_super(super, major(u->new_disks[0]), minor(u->new_disks[0])); dprintf("imsm: new disk for reshape is: %i:%i " "(%p, index = %i)\n", major(u->new_disks[0]), minor(u->new_disks[0]), new_disk, new_disk->index); if (new_disk == NULL) goto error_disk_add; new_disk->index = map->num_members - 1; /* slot to fill in autolayout */ new_disk->raiddisk = new_disk->index; new_disk->disk.status |= CONFIGURED_DISK; new_disk->disk.status &= ~SPARE_DISK; } else goto error_disk_add; skip_disk_add: *tofree = *space_list; /* calculate new size */ imsm_set_array_size(new_dev, -1); ret_val = 1; } } if (tofree) *space_list = tofree; return ret_val; error_disk_add: dprintf("Error: imsm: Cannot find disk.\n"); return ret_val; } static int apply_size_change_update(struct imsm_update_size_change *u, struct intel_super *super) { struct intel_dev *id; int ret_val = 0; dprintf("apply_size_change_update()\n"); if ((u->subdev < 0) || (u->subdev > 1)) { dprintf("imsm: Error: Wrong subdev: %i\n", u->subdev); return ret_val; } for (id = super->devlist ; id; id = id->next) { if (id->index == (unsigned)u->subdev) { struct imsm_dev *dev = get_imsm_dev(super, u->subdev); struct imsm_map *map = get_imsm_map(dev, MAP_0); int used_disks = imsm_num_data_members(dev, MAP_0); unsigned long long blocks_per_member; /* calculate new size */ blocks_per_member = u->new_size / used_disks; dprintf("imsm: apply_size_change_update(size: %llu, " "blocks per member: %llu)\n", u->new_size, blocks_per_member); set_blocks_per_member(map, blocks_per_member); imsm_set_array_size(dev, u->new_size); ret_val = 1; break; } } return ret_val; } static int apply_update_activate_spare(struct imsm_update_activate_spare *u, struct intel_super *super, struct active_array *active_array) { struct imsm_super *mpb = super->anchor; struct imsm_dev *dev = get_imsm_dev(super, u->array); struct imsm_map *map = get_imsm_map(dev, MAP_0); struct imsm_map *migr_map; struct active_array *a; struct imsm_disk *disk; __u8 to_state; struct dl *dl; unsigned int found; int failed; int victim; int i; int second_map_created = 0; for (; u; u = u->next) { victim = get_imsm_disk_idx(dev, u->slot, MAP_X); if (victim < 0) return 0; for (dl = super->disks; dl; dl = dl->next) if (dl == u->dl) break; if (!dl) { pr_err("error: imsm_activate_spare passed " "an unknown disk (index: %d)\n", u->dl->index); return 0; } /* count failures (excluding rebuilds and the victim) * to determine map[0] state */ failed = 0; for (i = 0; i < map->num_members; i++) { if (i == u->slot) continue; disk = get_imsm_disk(super, get_imsm_disk_idx(dev, i, MAP_X)); if (!disk || is_failed(disk)) failed++; } /* adding a pristine spare, assign a new index */ if (dl->index < 0) { dl->index = super->anchor->num_disks; super->anchor->num_disks++; } disk = &dl->disk; disk->status |= CONFIGURED_DISK; disk->status &= ~SPARE_DISK; /* mark rebuild */ to_state = imsm_check_degraded(super, dev, failed, MAP_0); if (!second_map_created) { second_map_created = 1; map->map_state = IMSM_T_STATE_DEGRADED; migrate(dev, super, to_state, MIGR_REBUILD); } else map->map_state = to_state; migr_map = get_imsm_map(dev, MAP_1); set_imsm_ord_tbl_ent(map, u->slot, dl->index); set_imsm_ord_tbl_ent(migr_map, u->slot, dl->index | IMSM_ORD_REBUILD); /* update the family_num to mark a new container * generation, being careful to record the existing * family_num in orig_family_num to clean up after * earlier mdadm versions that neglected to set it. */ if (mpb->orig_family_num == 0) mpb->orig_family_num = mpb->family_num; mpb->family_num += super->random; /* count arrays using the victim in the metadata */ found = 0; for (a = active_array; a ; a = a->next) { dev = get_imsm_dev(super, a->info.container_member); map = get_imsm_map(dev, MAP_0); if (get_imsm_disk_slot(map, victim) >= 0) found++; } /* delete the victim if it is no longer being * utilized anywhere */ if (!found) { struct dl **dlp; /* We know that 'manager' isn't touching anything, * so it is safe to delete */ for (dlp = &super->disks; *dlp; dlp = &(*dlp)->next) if ((*dlp)->index == victim) break; /* victim may be on the missing list */ if (!*dlp) for (dlp = &super->missing; *dlp; dlp = &(*dlp)->next) if ((*dlp)->index == victim) break; imsm_delete(super, dlp, victim); } } return 1; } static int apply_reshape_container_disks_update(struct imsm_update_reshape *u, struct intel_super *super, void ***space_list) { struct dl *new_disk; struct intel_dev *id; int i; int delta_disks = u->new_raid_disks - u->old_raid_disks; int disk_count = u->old_raid_disks; void **tofree = NULL; int devices_to_reshape = 1; struct imsm_super *mpb = super->anchor; int ret_val = 0; unsigned int dev_id; dprintf("imsm: apply_reshape_container_disks_update()\n"); /* enable spares to use in array */ for (i = 0; i < delta_disks; i++) { new_disk = get_disk_super(super, major(u->new_disks[i]), minor(u->new_disks[i])); dprintf("imsm: new disk for reshape is: %i:%i " "(%p, index = %i)\n", major(u->new_disks[i]), minor(u->new_disks[i]), new_disk, new_disk->index); if ((new_disk == NULL) || ((new_disk->index >= 0) && (new_disk->index < u->old_raid_disks))) goto update_reshape_exit; new_disk->index = disk_count++; /* slot to fill in autolayout */ new_disk->raiddisk = new_disk->index; new_disk->disk.status |= CONFIGURED_DISK; new_disk->disk.status &= ~SPARE_DISK; } dprintf("imsm: volume set mpb->num_raid_devs = %i\n", mpb->num_raid_devs); /* manage changes in volume */ for (dev_id = 0; dev_id < mpb->num_raid_devs; dev_id++) { void **sp = *space_list; struct imsm_dev *newdev; struct imsm_map *newmap, *oldmap; for (id = super->devlist ; id; id = id->next) { if (id->index == dev_id) break; } if (id == NULL) break; if (!sp) continue; *space_list = *sp; newdev = (void*)sp; /* Copy the dev, but not (all of) the map */ memcpy(newdev, id->dev, sizeof(*newdev)); oldmap = get_imsm_map(id->dev, MAP_0); newmap = get_imsm_map(newdev, MAP_0); /* Copy the current map */ memcpy(newmap, oldmap, sizeof_imsm_map(oldmap)); /* update one device only */ if (devices_to_reshape) { dprintf("imsm: modifying subdev: %i\n", id->index); devices_to_reshape--; newdev->vol.migr_state = 1; newdev->vol.curr_migr_unit = 0; set_migr_type(newdev, MIGR_GEN_MIGR); newmap->num_members = u->new_raid_disks; for (i = 0; i < delta_disks; i++) { set_imsm_ord_tbl_ent(newmap, u->old_raid_disks + i, u->old_raid_disks + i); } /* New map is correct, now need to save old map */ newmap = get_imsm_map(newdev, MAP_1); memcpy(newmap, oldmap, sizeof_imsm_map(oldmap)); imsm_set_array_size(newdev, -1); } sp = (void **)id->dev; id->dev = newdev; *sp = tofree; tofree = sp; /* Clear migration record */ memset(super->migr_rec, 0, sizeof(struct migr_record)); } if (tofree) *space_list = tofree; ret_val = 1; update_reshape_exit: return ret_val; } static int apply_takeover_update(struct imsm_update_takeover *u, struct intel_super *super, void ***space_list) { struct imsm_dev *dev = NULL; struct intel_dev *dv; struct imsm_dev *dev_new; struct imsm_map *map; struct dl *dm, *du; int i; for (dv = super->devlist; dv; dv = dv->next) if (dv->index == (unsigned int)u->subarray) { dev = dv->dev; break; } if (dev == NULL) return 0; map = get_imsm_map(dev, MAP_0); if (u->direction == R10_TO_R0) { /* Number of failed disks must be half of initial disk number */ if (imsm_count_failed(super, dev, MAP_0) != (map->num_members / 2)) return 0; /* iterate through devices to mark removed disks as spare */ for (dm = super->disks; dm; dm = dm->next) { if (dm->disk.status & FAILED_DISK) { int idx = dm->index; /* update indexes on the disk list */ /* FIXME this loop-with-the-loop looks wrong, I'm not convinced the index values will end up being correct.... NB */ for (du = super->disks; du; du = du->next) if (du->index > idx) du->index--; /* mark as spare disk */ mark_spare(dm); } } /* update map */ map->num_members = map->num_members / 2; map->map_state = IMSM_T_STATE_NORMAL; map->num_domains = 1; map->raid_level = 0; map->failed_disk_num = -1; } if (u->direction == R0_TO_R10) { void **space; /* update slots in current disk list */ for (dm = super->disks; dm; dm = dm->next) { if (dm->index >= 0) dm->index *= 2; } /* create new *missing* disks */ for (i = 0; i < map->num_members; i++) { space = *space_list; if (!space) continue; *space_list = *space; du = (void *)space; memcpy(du, super->disks, sizeof(*du)); du->fd = -1; du->minor = 0; du->major = 0; du->index = (i * 2) + 1; sprintf((char *)du->disk.serial, " MISSING_%d", du->index); sprintf((char *)du->serial, "MISSING_%d", du->index); du->next = super->missing; super->missing = du; } /* create new dev and map */ space = *space_list; if (!space) return 0; *space_list = *space; dev_new = (void *)space; memcpy(dev_new, dev, sizeof(*dev)); /* update new map */ map = get_imsm_map(dev_new, MAP_0); map->num_members = map->num_members * 2; map->map_state = IMSM_T_STATE_DEGRADED; map->num_domains = 2; map->raid_level = 1; /* replace dev<->dev_new */ dv->dev = dev_new; } /* update disk order table */ for (du = super->disks; du; du = du->next) if (du->index >= 0) set_imsm_ord_tbl_ent(map, du->index, du->index); for (du = super->missing; du; du = du->next) if (du->index >= 0) { set_imsm_ord_tbl_ent(map, du->index, du->index); mark_missing(dv->dev, &du->disk, du->index); } return 1; } static void imsm_process_update(struct supertype *st, struct metadata_update *update) { /** * crack open the metadata_update envelope to find the update record * update can be one of: * update_reshape_container_disks - all the arrays in the container * are being reshaped to have more devices. We need to mark * the arrays for general migration and convert selected spares * into active devices. * update_activate_spare - a spare device has replaced a failed * device in an array, update the disk_ord_tbl. If this disk is * present in all member arrays then also clear the SPARE_DISK * flag * update_create_array * update_kill_array * update_rename_array * update_add_remove_disk */ struct intel_super *super = st->sb; struct imsm_super *mpb; enum imsm_update_type type = *(enum imsm_update_type *) update->buf; /* update requires a larger buf but the allocation failed */ if (super->next_len && !super->next_buf) { super->next_len = 0; return; } if (super->next_buf) { memcpy(super->next_buf, super->buf, super->len); free(super->buf); super->len = super->next_len; super->buf = super->next_buf; super->next_len = 0; super->next_buf = NULL; } mpb = super->anchor; switch (type) { case update_general_migration_checkpoint: { struct intel_dev *id; struct imsm_update_general_migration_checkpoint *u = (void *)update->buf; dprintf("imsm: process_update() " "for update_general_migration_checkpoint called\n"); /* find device under general migration */ for (id = super->devlist ; id; id = id->next) { if (is_gen_migration(id->dev)) { id->dev->vol.curr_migr_unit = __cpu_to_le32(u->curr_migr_unit); super->updates_pending++; } } break; } case update_takeover: { struct imsm_update_takeover *u = (void *)update->buf; if (apply_takeover_update(u, super, &update->space_list)) { imsm_update_version_info(super); super->updates_pending++; } break; } case update_reshape_container_disks: { struct imsm_update_reshape *u = (void *)update->buf; if (apply_reshape_container_disks_update( u, super, &update->space_list)) super->updates_pending++; break; } case update_reshape_migration: { struct imsm_update_reshape_migration *u = (void *)update->buf; if (apply_reshape_migration_update( u, super, &update->space_list)) super->updates_pending++; break; } case update_size_change: { struct imsm_update_size_change *u = (void *)update->buf; if (apply_size_change_update(u, super)) super->updates_pending++; break; } case update_activate_spare: { struct imsm_update_activate_spare *u = (void *) update->buf; if (apply_update_activate_spare(u, super, st->arrays)) super->updates_pending++; break; } case update_create_array: { /* someone wants to create a new array, we need to be aware of * a few races/collisions: * 1/ 'Create' called by two separate instances of mdadm * 2/ 'Create' versus 'activate_spare': mdadm has chosen * devices that have since been assimilated via * activate_spare. * In the event this update can not be carried out mdadm will * (FIX ME) notice that its update did not take hold. */ struct imsm_update_create_array *u = (void *) update->buf; struct intel_dev *dv; struct imsm_dev *dev; struct imsm_map *map, *new_map; unsigned long long start, end; unsigned long long new_start, new_end; int i; struct disk_info *inf; struct dl *dl; /* handle racing creates: first come first serve */ if (u->dev_idx < mpb->num_raid_devs) { dprintf("%s: subarray %d already defined\n", __func__, u->dev_idx); goto create_error; } /* check update is next in sequence */ if (u->dev_idx != mpb->num_raid_devs) { dprintf("%s: can not create array %d expected index %d\n", __func__, u->dev_idx, mpb->num_raid_devs); goto create_error; } new_map = get_imsm_map(&u->dev, MAP_0); new_start = pba_of_lba0(new_map); new_end = new_start + blocks_per_member(new_map); inf = get_disk_info(u); /* handle activate_spare versus create race: * check to make sure that overlapping arrays do not include * overalpping disks */ for (i = 0; i < mpb->num_raid_devs; i++) { dev = get_imsm_dev(super, i); map = get_imsm_map(dev, MAP_0); start = pba_of_lba0(map); end = start + blocks_per_member(map); if ((new_start >= start && new_start <= end) || (start >= new_start && start <= new_end)) /* overlap */; else continue; if (disks_overlap(super, i, u)) { dprintf("%s: arrays overlap\n", __func__); goto create_error; } } /* check that prepare update was successful */ if (!update->space) { dprintf("%s: prepare update failed\n", __func__); goto create_error; } /* check that all disks are still active before committing * changes. FIXME: could we instead handle this by creating a * degraded array? That's probably not what the user expects, * so better to drop this update on the floor. */ for (i = 0; i < new_map->num_members; i++) { dl = serial_to_dl(inf[i].serial, super); if (!dl) { dprintf("%s: disk disappeared\n", __func__); goto create_error; } } super->updates_pending++; /* convert spares to members and fixup ord_tbl */ for (i = 0; i < new_map->num_members; i++) { dl = serial_to_dl(inf[i].serial, super); if (dl->index == -1) { dl->index = mpb->num_disks; mpb->num_disks++; dl->disk.status |= CONFIGURED_DISK; dl->disk.status &= ~SPARE_DISK; } set_imsm_ord_tbl_ent(new_map, i, dl->index); } dv = update->space; dev = dv->dev; update->space = NULL; imsm_copy_dev(dev, &u->dev); dv->index = u->dev_idx; dv->next = super->devlist; super->devlist = dv; mpb->num_raid_devs++; imsm_update_version_info(super); break; create_error: /* mdmon knows how to release update->space, but not * ((struct intel_dev *) update->space)->dev */ if (update->space) { dv = update->space; free(dv->dev); } break; } case update_kill_array: { struct imsm_update_kill_array *u = (void *) update->buf; int victim = u->dev_idx; struct active_array *a; struct intel_dev **dp; struct imsm_dev *dev; /* sanity check that we are not affecting the uuid of * active arrays, or deleting an active array * * FIXME when immutable ids are available, but note that * we'll also need to fixup the invalidated/active * subarray indexes in mdstat */ for (a = st->arrays; a; a = a->next) if (a->info.container_member >= victim) break; /* by definition if mdmon is running at least one array * is active in the container, so checking * mpb->num_raid_devs is just extra paranoia */ dev = get_imsm_dev(super, victim); if (a || !dev || mpb->num_raid_devs == 1) { dprintf("failed to delete subarray-%d\n", victim); break; } for (dp = &super->devlist; *dp;) if ((*dp)->index == (unsigned)super->current_vol) { *dp = (*dp)->next; } else { if ((*dp)->index > (unsigned)victim) (*dp)->index--; dp = &(*dp)->next; } mpb->num_raid_devs--; super->updates_pending++; break; } case update_rename_array: { struct imsm_update_rename_array *u = (void *) update->buf; char name[MAX_RAID_SERIAL_LEN+1]; int target = u->dev_idx; struct active_array *a; struct imsm_dev *dev; /* sanity check that we are not affecting the uuid of * an active array */ snprintf(name, MAX_RAID_SERIAL_LEN, "%s", (char *) u->name); name[MAX_RAID_SERIAL_LEN] = '\0'; for (a = st->arrays; a; a = a->next) if (a->info.container_member == target) break; dev = get_imsm_dev(super, u->dev_idx); if (a || !dev || !check_name(super, name, 1)) { dprintf("failed to rename subarray-%d\n", target); break; } snprintf((char *) dev->volume, MAX_RAID_SERIAL_LEN, "%s", name); super->updates_pending++; break; } case update_add_remove_disk: { /* we may be able to repair some arrays if disks are * being added, check teh status of add_remove_disk * if discs has been added. */ if (add_remove_disk_update(super)) { struct active_array *a; super->updates_pending++; for (a = st->arrays; a; a = a->next) a->check_degraded = 1; } break; } default: pr_err("error: unsuported process update type:" "(type: %d)\n", type); } } static struct mdinfo *get_spares_for_grow(struct supertype *st); static void imsm_prepare_update(struct supertype *st, struct metadata_update *update) { /** * Allocate space to hold new disk entries, raid-device entries or a new * mpb if necessary. The manager synchronously waits for updates to * complete in the monitor, so new mpb buffers allocated here can be * integrated by the monitor thread without worrying about live pointers * in the manager thread. */ enum imsm_update_type type = *(enum imsm_update_type *) update->buf; struct intel_super *super = st->sb; struct imsm_super *mpb = super->anchor; size_t buf_len; size_t len = 0; switch (type) { case update_general_migration_checkpoint: dprintf("imsm: prepare_update() " "for update_general_migration_checkpoint called\n"); break; case update_takeover: { struct imsm_update_takeover *u = (void *)update->buf; if (u->direction == R0_TO_R10) { void **tail = (void **)&update->space_list; struct imsm_dev *dev = get_imsm_dev(super, u->subarray); struct imsm_map *map = get_imsm_map(dev, MAP_0); int num_members = map->num_members; void *space; int size, i; /* allocate memory for added disks */ for (i = 0; i < num_members; i++) { size = sizeof(struct dl); space = xmalloc(size); *tail = space; tail = space; *tail = NULL; } /* allocate memory for new device */ size = sizeof_imsm_dev(super->devlist->dev, 0) + (num_members * sizeof(__u32)); space = xmalloc(size); *tail = space; tail = space; *tail = NULL; len = disks_to_mpb_size(num_members * 2); } break; } case update_reshape_container_disks: { /* Every raid device in the container is about to * gain some more devices, and we will enter a * reconfiguration. * So each 'imsm_map' will be bigger, and the imsm_vol * will now hold 2 of them. * Thus we need new 'struct imsm_dev' allocations sized * as sizeof_imsm_dev but with more devices in both maps. */ struct imsm_update_reshape *u = (void *)update->buf; struct intel_dev *dl; void **space_tail = (void**)&update->space_list; dprintf("imsm: imsm_prepare_update() for update_reshape\n"); for (dl = super->devlist; dl; dl = dl->next) { int size = sizeof_imsm_dev(dl->dev, 1); void *s; if (u->new_raid_disks > u->old_raid_disks) size += sizeof(__u32)*2* (u->new_raid_disks - u->old_raid_disks); s = xmalloc(size); *space_tail = s; space_tail = s; *space_tail = NULL; } len = disks_to_mpb_size(u->new_raid_disks); dprintf("New anchor length is %llu\n", (unsigned long long)len); break; } case update_reshape_migration: { /* for migration level 0->5 we need to add disks * so the same as for container operation we will copy * device to the bigger location. * in memory prepared device and new disk area are prepared * for usage in process update */ struct imsm_update_reshape_migration *u = (void *)update->buf; struct intel_dev *id; void **space_tail = (void **)&update->space_list; int size; void *s; int current_level = -1; dprintf("imsm: imsm_prepare_update() for update_reshape\n"); /* add space for bigger array in update */ for (id = super->devlist; id; id = id->next) { if (id->index == (unsigned)u->subdev) { size = sizeof_imsm_dev(id->dev, 1); if (u->new_raid_disks > u->old_raid_disks) size += sizeof(__u32)*2* (u->new_raid_disks - u->old_raid_disks); s = xmalloc(size); *space_tail = s; space_tail = s; *space_tail = NULL; break; } } if (update->space_list == NULL) break; /* add space for disk in update */ size = sizeof(struct dl); s = xmalloc(size); *space_tail = s; space_tail = s; *space_tail = NULL; /* add spare device to update */ for (id = super->devlist ; id; id = id->next) if (id->index == (unsigned)u->subdev) { struct imsm_dev *dev; struct imsm_map *map; dev = get_imsm_dev(super, u->subdev); map = get_imsm_map(dev, MAP_0); current_level = map->raid_level; break; } if ((u->new_level == 5) && (u->new_level != current_level)) { struct mdinfo *spares; spares = get_spares_for_grow(st); if (spares) { struct dl *dl; struct mdinfo *dev; dev = spares->devs; if (dev) { u->new_disks[0] = makedev(dev->disk.major, dev->disk.minor); dl = get_disk_super(super, dev->disk.major, dev->disk.minor); dl->index = u->old_raid_disks; dev = dev->next; } sysfs_free(spares); } } len = disks_to_mpb_size(u->new_raid_disks); dprintf("New anchor length is %llu\n", (unsigned long long)len); break; } case update_size_change: { break; } case update_create_array: { struct imsm_update_create_array *u = (void *) update->buf; struct intel_dev *dv; struct imsm_dev *dev = &u->dev; struct imsm_map *map = get_imsm_map(dev, MAP_0); struct dl *dl; struct disk_info *inf; int i; int activate = 0; inf = get_disk_info(u); len = sizeof_imsm_dev(dev, 1); /* allocate a new super->devlist entry */ dv = xmalloc(sizeof(*dv)); dv->dev = xmalloc(len); update->space = dv; /* count how many spares will be converted to members */ for (i = 0; i < map->num_members; i++) { dl = serial_to_dl(inf[i].serial, super); if (!dl) { /* hmm maybe it failed?, nothing we can do about * it here */ continue; } if (count_memberships(dl, super) == 0) activate++; } len += activate * sizeof(struct imsm_disk); break; default: break; } } /* check if we need a larger metadata buffer */ if (super->next_buf) buf_len = super->next_len; else buf_len = super->len; if (__le32_to_cpu(mpb->mpb_size) + len > buf_len) { /* ok we need a larger buf than what is currently allocated * if this allocation fails process_update will notice that * ->next_len is set and ->next_buf is NULL */ buf_len = ROUND_UP(__le32_to_cpu(mpb->mpb_size) + len, 512); if (super->next_buf) free(super->next_buf); super->next_len = buf_len; if (posix_memalign(&super->next_buf, 512, buf_len) == 0) memset(super->next_buf, 0, buf_len); else super->next_buf = NULL; } } /* must be called while manager is quiesced */ static void imsm_delete(struct intel_super *super, struct dl **dlp, unsigned index) { struct imsm_super *mpb = super->anchor; struct dl *iter; struct imsm_dev *dev; struct imsm_map *map; int i, j, num_members; __u32 ord; dprintf("%s: deleting device[%d] from imsm_super\n", __func__, index); /* shift all indexes down one */ for (iter = super->disks; iter; iter = iter->next) if (iter->index > (int)index) iter->index--; for (iter = super->missing; iter; iter = iter->next) if (iter->index > (int)index) iter->index--; for (i = 0; i < mpb->num_raid_devs; i++) { dev = get_imsm_dev(super, i); map = get_imsm_map(dev, MAP_0); num_members = map->num_members; for (j = 0; j < num_members; j++) { /* update ord entries being careful not to propagate * ord-flags to the first map */ ord = get_imsm_ord_tbl_ent(dev, j, MAP_X); if (ord_to_idx(ord) <= index) continue; map = get_imsm_map(dev, MAP_0); set_imsm_ord_tbl_ent(map, j, ord_to_idx(ord - 1)); map = get_imsm_map(dev, MAP_1); if (map) set_imsm_ord_tbl_ent(map, j, ord - 1); } } mpb->num_disks--; super->updates_pending++; if (*dlp) { struct dl *dl = *dlp; *dlp = (*dlp)->next; __free_imsm_disk(dl); } } #endif /* MDASSEMBLE */ static void close_targets(int *targets, int new_disks) { int i; if (!targets) return; for (i = 0; i < new_disks; i++) { if (targets[i] >= 0) { close(targets[i]); targets[i] = -1; } } } static int imsm_get_allowed_degradation(int level, int raid_disks, struct intel_super *super, struct imsm_dev *dev) { switch (level) { case 1: case 10:{ int ret_val = 0; struct imsm_map *map; int i; ret_val = raid_disks/2; /* check map if all disks pairs not failed * in both maps */ map = get_imsm_map(dev, MAP_0); for (i = 0; i < ret_val; i++) { int degradation = 0; if (get_imsm_disk(super, i) == NULL) degradation++; if (get_imsm_disk(super, i + 1) == NULL) degradation++; if (degradation == 2) return 0; } map = get_imsm_map(dev, MAP_1); /* if there is no second map * result can be returned */ if (map == NULL) return ret_val; /* check degradation in second map */ for (i = 0; i < ret_val; i++) { int degradation = 0; if (get_imsm_disk(super, i) == NULL) degradation++; if (get_imsm_disk(super, i + 1) == NULL) degradation++; if (degradation == 2) return 0; } return ret_val; } case 5: return 1; case 6: return 2; default: return 0; } } /******************************************************************************* * Function: open_backup_targets * Description: Function opens file descriptors for all devices given in * info->devs * Parameters: * info : general array info * raid_disks : number of disks * raid_fds : table of device's file descriptors * super : intel super for raid10 degradation check * dev : intel device for raid10 degradation check * Returns: * 0 : success * -1 : fail ******************************************************************************/ int open_backup_targets(struct mdinfo *info, int raid_disks, int *raid_fds, struct intel_super *super, struct imsm_dev *dev) { struct mdinfo *sd; int i; int opened = 0; for (i = 0; i < raid_disks; i++) raid_fds[i] = -1; for (sd = info->devs ; sd ; sd = sd->next) { char *dn; if (sd->disk.state & (1<<MD_DISK_FAULTY)) { dprintf("disk is faulty!!\n"); continue; } if ((sd->disk.raid_disk >= raid_disks) || (sd->disk.raid_disk < 0)) continue; dn = map_dev(sd->disk.major, sd->disk.minor, 1); raid_fds[sd->disk.raid_disk] = dev_open(dn, O_RDWR); if (raid_fds[sd->disk.raid_disk] < 0) { pr_err("cannot open component\n"); continue; } opened++; } /* check if maximum array degradation level is not exceeded */ if ((raid_disks - opened) > imsm_get_allowed_degradation(info->new_level, raid_disks, super, dev)) { pr_err("Not enough disks can be opened.\n"); close_targets(raid_fds, raid_disks); return -2; } return 0; } #ifndef MDASSEMBLE /******************************************************************************* * Function: init_migr_record_imsm * Description: Function inits imsm migration record * Parameters: * super : imsm internal array info * dev : device under migration * info : general array info to find the smallest device * Returns: * none ******************************************************************************/ void init_migr_record_imsm(struct supertype *st, struct imsm_dev *dev, struct mdinfo *info) { struct intel_super *super = st->sb; struct migr_record *migr_rec = super->migr_rec; int new_data_disks; unsigned long long dsize, dev_sectors; long long unsigned min_dev_sectors = -1LLU; struct mdinfo *sd; char nm[30]; int fd; struct imsm_map *map_dest = get_imsm_map(dev, MAP_0); struct imsm_map *map_src = get_imsm_map(dev, MAP_1); unsigned long long num_migr_units; unsigned long long array_blocks; memset(migr_rec, 0, sizeof(struct migr_record)); migr_rec->family_num = __cpu_to_le32(super->anchor->family_num); /* only ascending reshape supported now */ migr_rec->ascending_migr = __cpu_to_le32(1); migr_rec->dest_depth_per_unit = GEN_MIGR_AREA_SIZE / max(map_dest->blocks_per_strip, map_src->blocks_per_strip); migr_rec->dest_depth_per_unit *= max(map_dest->blocks_per_strip, map_src->blocks_per_strip); new_data_disks = imsm_num_data_members(dev, MAP_0); migr_rec->blocks_per_unit = __cpu_to_le32(migr_rec->dest_depth_per_unit * new_data_disks); migr_rec->dest_depth_per_unit = __cpu_to_le32(migr_rec->dest_depth_per_unit); array_blocks = info->component_size * new_data_disks; num_migr_units = array_blocks / __le32_to_cpu(migr_rec->blocks_per_unit); if (array_blocks % __le32_to_cpu(migr_rec->blocks_per_unit)) num_migr_units++; migr_rec->num_migr_units = __cpu_to_le32(num_migr_units); migr_rec->post_migr_vol_cap = dev->size_low; migr_rec->post_migr_vol_cap_hi = dev->size_high; /* Find the smallest dev */ for (sd = info->devs ; sd ; sd = sd->next) { sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor); fd = dev_open(nm, O_RDONLY); if (fd < 0) continue; get_dev_size(fd, NULL, &dsize); dev_sectors = dsize / 512; if (dev_sectors < min_dev_sectors) min_dev_sectors = dev_sectors; close(fd); } migr_rec->ckpt_area_pba = __cpu_to_le32(min_dev_sectors - RAID_DISK_RESERVED_BLOCKS_IMSM_HI); write_imsm_migr_rec(st); return; } /******************************************************************************* * Function: save_backup_imsm * Description: Function saves critical data stripes to Migration Copy Area * and updates the current migration unit status. * Use restore_stripes() to form a destination stripe, * and to write it to the Copy Area. * Parameters: * st : supertype information * dev : imsm device that backup is saved for * info : general array info * buf : input buffer * length : length of data to backup (blocks_per_unit) * Returns: * 0 : success *, -1 : fail ******************************************************************************/ int save_backup_imsm(struct supertype *st, struct imsm_dev *dev, struct mdinfo *info, void *buf, int length) { int rv = -1; struct intel_super *super = st->sb; unsigned long long *target_offsets = NULL; int *targets = NULL; int i; struct imsm_map *map_dest = get_imsm_map(dev, MAP_0); int new_disks = map_dest->num_members; int dest_layout = 0; int dest_chunk; unsigned long long start; int data_disks = imsm_num_data_members(dev, MAP_0); targets = xmalloc(new_disks * sizeof(int)); for (i = 0; i < new_disks; i++) targets[i] = -1; target_offsets = xcalloc(new_disks, sizeof(unsigned long long)); start = info->reshape_progress * 512; for (i = 0; i < new_disks; i++) { target_offsets[i] = (unsigned long long) __le32_to_cpu(super->migr_rec->ckpt_area_pba) * 512; /* move back copy area adderss, it will be moved forward * in restore_stripes() using start input variable */ target_offsets[i] -= start/data_disks; } if (open_backup_targets(info, new_disks, targets, super, dev)) goto abort; dest_layout = imsm_level_to_layout(map_dest->raid_level); dest_chunk = __le16_to_cpu(map_dest->blocks_per_strip) * 512; if (restore_stripes(targets, /* list of dest devices */ target_offsets, /* migration record offsets */ new_disks, dest_chunk, map_dest->raid_level, dest_layout, -1, /* source backup file descriptor */ 0, /* input buf offset * always 0 buf is already offseted */ start, length, buf) != 0) { pr_err("Error restoring stripes\n"); goto abort; } rv = 0; abort: if (targets) { close_targets(targets, new_disks); free(targets); } free(target_offsets); return rv; } /******************************************************************************* * Function: save_checkpoint_imsm * Description: Function called for current unit status update * in the migration record. It writes it to disk. * Parameters: * super : imsm internal array info * info : general array info * Returns: * 0: success * 1: failure * 2: failure, means no valid migration record * / no general migration in progress / ******************************************************************************/ int save_checkpoint_imsm(struct supertype *st, struct mdinfo *info, int state) { struct intel_super *super = st->sb; unsigned long long blocks_per_unit; unsigned long long curr_migr_unit; if (load_imsm_migr_rec(super, info) != 0) { dprintf("imsm: ERROR: Cannot read migration record " "for checkpoint save.\n"); return 1; } blocks_per_unit = __le32_to_cpu(super->migr_rec->blocks_per_unit); if (blocks_per_unit == 0) { dprintf("imsm: no migration in progress.\n"); return 2; } curr_migr_unit = info->reshape_progress / blocks_per_unit; /* check if array is alligned to copy area * if it is not alligned, add one to current migration unit value * this can happend on array reshape finish only */ if (info->reshape_progress % blocks_per_unit) curr_migr_unit++; super->migr_rec->curr_migr_unit = __cpu_to_le32(curr_migr_unit); super->migr_rec->rec_status = __cpu_to_le32(state); super->migr_rec->dest_1st_member_lba = __cpu_to_le32(curr_migr_unit * __le32_to_cpu(super->migr_rec->dest_depth_per_unit)); if (write_imsm_migr_rec(st) < 0) { dprintf("imsm: Cannot write migration record " "outside backup area\n"); return 1; } return 0; } /******************************************************************************* * Function: recover_backup_imsm * Description: Function recovers critical data from the Migration Copy Area * while assembling an array. * Parameters: * super : imsm internal array info * info : general array info * Returns: * 0 : success (or there is no data to recover) * 1 : fail ******************************************************************************/ int recover_backup_imsm(struct supertype *st, struct mdinfo *info) { struct intel_super *super = st->sb; struct migr_record *migr_rec = super->migr_rec; struct imsm_map *map_dest = NULL; struct intel_dev *id = NULL; unsigned long long read_offset; unsigned long long write_offset; unsigned unit_len; int *targets = NULL; int new_disks, i, err; char *buf = NULL; int retval = 1; unsigned long curr_migr_unit = __le32_to_cpu(migr_rec->curr_migr_unit); unsigned long num_migr_units = __le32_to_cpu(migr_rec->num_migr_units); char buffer[20]; int skipped_disks = 0; err = sysfs_get_str(info, NULL, "array_state", (char *)buffer, 20); if (err < 1) return 1; /* recover data only during assemblation */ if (strncmp(buffer, "inactive", 8) != 0) return 0; /* no data to recover */ if (__le32_to_cpu(migr_rec->rec_status) == UNIT_SRC_NORMAL) return 0; if (curr_migr_unit >= num_migr_units) return 1; /* find device during reshape */ for (id = super->devlist; id; id = id->next) if (is_gen_migration(id->dev)) break; if (id == NULL) return 1; map_dest = get_imsm_map(id->dev, MAP_0); new_disks = map_dest->num_members; read_offset = (unsigned long long) __le32_to_cpu(migr_rec->ckpt_area_pba) * 512; write_offset = ((unsigned long long) __le32_to_cpu(migr_rec->dest_1st_member_lba) + pba_of_lba0(map_dest)) * 512; unit_len = __le32_to_cpu(migr_rec->dest_depth_per_unit) * 512; if (posix_memalign((void **)&buf, 512, unit_len) != 0) goto abort; targets = xcalloc(new_disks, sizeof(int)); if (open_backup_targets(info, new_disks, targets, super, id->dev)) { pr_err("Cannot open some devices belonging to array.\n"); goto abort; } for (i = 0; i < new_disks; i++) { if (targets[i] < 0) { skipped_disks++; continue; } if (lseek64(targets[i], read_offset, SEEK_SET) < 0) { pr_err("Cannot seek to block: %s\n", strerror(errno)); skipped_disks++; continue; } if ((unsigned)read(targets[i], buf, unit_len) != unit_len) { pr_err("Cannot read copy area block: %s\n", strerror(errno)); skipped_disks++; continue; } if (lseek64(targets[i], write_offset, SEEK_SET) < 0) { pr_err("Cannot seek to block: %s\n", strerror(errno)); skipped_disks++; continue; } if ((unsigned)write(targets[i], buf, unit_len) != unit_len) { pr_err("Cannot restore block: %s\n", strerror(errno)); skipped_disks++; continue; } } if (skipped_disks > imsm_get_allowed_degradation(info->new_level, new_disks, super, id->dev)) { pr_err("Cannot restore data from backup." " Too many failed disks\n"); goto abort; } if (save_checkpoint_imsm(st, info, UNIT_SRC_NORMAL)) { /* ignore error == 2, this can mean end of reshape here */ dprintf("imsm: Cannot write checkpoint to " "migration record (UNIT_SRC_NORMAL) during restart\n"); } else retval = 0; abort: if (targets) { for (i = 0; i < new_disks; i++) if (targets[i]) close(targets[i]); free(targets); } free(buf); return retval; } static char disk_by_path[] = "/dev/disk/by-path/"; static const char *imsm_get_disk_controller_domain(const char *path) { char disk_path[PATH_MAX]; char *drv=NULL; struct stat st; strncpy(disk_path, disk_by_path, PATH_MAX - 1); strncat(disk_path, path, PATH_MAX - strlen(disk_path) - 1); if (stat(disk_path, &st) == 0) { struct sys_dev* hba; char *path=NULL; path = devt_to_devpath(st.st_rdev); if (path == NULL) return "unknown"; hba = find_disk_attached_hba(-1, path); if (hba && hba->type == SYS_DEV_SAS) drv = "isci"; else if (hba && hba->type == SYS_DEV_SATA) drv = "ahci"; else drv = "unknown"; dprintf("path: %s hba: %s attached: %s\n", path, (hba) ? hba->path : "NULL", drv); free(path); } return drv; } static char *imsm_find_array_devnm_by_subdev(int subdev, char *container) { static char devnm[32]; char subdev_name[20]; struct mdstat_ent *mdstat; sprintf(subdev_name, "%d", subdev); mdstat = mdstat_by_subdev(subdev_name, container); if (!mdstat) return NULL; strcpy(devnm, mdstat->devnm); free_mdstat(mdstat); return devnm; } static int imsm_reshape_is_allowed_on_container(struct supertype *st, struct geo_params *geo, int *old_raid_disks, int direction) { /* currently we only support increasing the number of devices * for a container. This increases the number of device for each * member array. They must all be RAID0 or RAID5. */ int ret_val = 0; struct mdinfo *info, *member; int devices_that_can_grow = 0; dprintf("imsm: imsm_reshape_is_allowed_on_container(ENTER): " "st->devnm = (%s)\n", st->devnm); if (geo->size > 0 || geo->level != UnSet || geo->layout != UnSet || geo->chunksize != 0 || geo->raid_disks == UnSet) { dprintf("imsm: Container operation is allowed for " "raid disks number change only.\n"); return ret_val; } if (direction == ROLLBACK_METADATA_CHANGES) { dprintf("imsm: Metadata changes rollback is not supported for " "container operation.\n"); return ret_val; } info = container_content_imsm(st, NULL); for (member = info; member; member = member->next) { char *result; dprintf("imsm: checking device_num: %i\n", member->container_member); if (geo->raid_disks <= member->array.raid_disks) { /* we work on container for Online Capacity Expansion * only so raid_disks has to grow */ dprintf("imsm: for container operation raid disks " "increase is required\n"); break; } if ((info->array.level != 0) && (info->array.level != 5)) { /* we cannot use this container with other raid level */ dprintf("imsm: for container operation wrong" " raid level (%i) detected\n", info->array.level); break; } else { /* check for platform support * for this raid level configuration */ struct intel_super *super = st->sb; if (!is_raid_level_supported(super->orom, member->array.level, geo->raid_disks)) { dprintf("platform does not support raid%d with" " %d disk%s\n", info->array.level, geo->raid_disks, geo->raid_disks > 1 ? "s" : ""); break; } /* check if component size is aligned to chunk size */ if (info->component_size % (info->array.chunk_size/512)) { dprintf("Component size is not aligned to " "chunk size\n"); break; } } if (*old_raid_disks && info->array.raid_disks != *old_raid_disks) break; *old_raid_disks = info->array.raid_disks; /* All raid5 and raid0 volumes in container * have to be ready for Online Capacity Expansion * so they need to be assembled. We have already * checked that no recovery etc is happening. */ result = imsm_find_array_devnm_by_subdev(member->container_member, st->container_devnm); if (result == NULL) { dprintf("imsm: cannot find array\n"); break; } devices_that_can_grow++; } sysfs_free(info); if (!member && devices_that_can_grow) ret_val = 1; if (ret_val) dprintf("\tContainer operation allowed\n"); else dprintf("\tError: %i\n", ret_val); return ret_val; } /* Function: get_spares_for_grow * Description: Allocates memory and creates list of spare devices * avaliable in container. Checks if spare drive size is acceptable. * Parameters: Pointer to the supertype structure * Returns: Pointer to the list of spare devices (mdinfo structure) on success, * NULL if fail */ static struct mdinfo *get_spares_for_grow(struct supertype *st) { unsigned long long min_size = min_acceptable_spare_size_imsm(st); return container_choose_spares(st, min_size, NULL, NULL, NULL, 0); } /****************************************************************************** * function: imsm_create_metadata_update_for_reshape * Function creates update for whole IMSM container. * ******************************************************************************/ static int imsm_create_metadata_update_for_reshape( struct supertype *st, struct geo_params *geo, int old_raid_disks, struct imsm_update_reshape **updatep) { struct intel_super *super = st->sb; struct imsm_super *mpb = super->anchor; int update_memory_size = 0; struct imsm_update_reshape *u = NULL; struct mdinfo *spares = NULL; int i; int delta_disks = 0; struct mdinfo *dev; dprintf("imsm_update_metadata_for_reshape(enter) raid_disks = %i\n", geo->raid_disks); delta_disks = geo->raid_disks - old_raid_disks; /* size of all update data without anchor */ update_memory_size = sizeof(struct imsm_update_reshape); /* now add space for spare disks that we need to add. */ update_memory_size += sizeof(u->new_disks[0]) * (delta_disks - 1); u = xcalloc(1, update_memory_size); u->type = update_reshape_container_disks; u->old_raid_disks = old_raid_disks; u->new_raid_disks = geo->raid_disks; /* now get spare disks list */ spares = get_spares_for_grow(st); if (spares == NULL || delta_disks > spares->array.spare_disks) { pr_err("imsm: ERROR: Cannot get spare devices " "for %s.\n", geo->dev_name); i = -1; goto abort; } /* we have got spares * update disk list in imsm_disk list table in anchor */ dprintf("imsm: %i spares are available.\n\n", spares->array.spare_disks); dev = spares->devs; for (i = 0; i < delta_disks; i++) { struct dl *dl; if (dev == NULL) break; u->new_disks[i] = makedev(dev->disk.major, dev->disk.minor); dl = get_disk_super(super, dev->disk.major, dev->disk.minor); dl->index = mpb->num_disks; mpb->num_disks++; dev = dev->next; } abort: /* free spares */ sysfs_free(spares); dprintf("imsm: reshape update preparation :"); if (i == delta_disks) { dprintf(" OK\n"); *updatep = u; return update_memory_size; } free(u); dprintf(" Error\n"); return 0; } /****************************************************************************** * function: imsm_create_metadata_update_for_size_change() * Creates update for IMSM array for array size change. * ******************************************************************************/ static int imsm_create_metadata_update_for_size_change( struct supertype *st, struct geo_params *geo, struct imsm_update_size_change **updatep) { struct intel_super *super = st->sb; int update_memory_size = 0; struct imsm_update_size_change *u = NULL; dprintf("imsm_create_metadata_update_for_size_change(enter)" " New size = %llu\n", geo->size); /* size of all update data without anchor */ update_memory_size = sizeof(struct imsm_update_size_change); u = xcalloc(1, update_memory_size); u->type = update_size_change; u->subdev = super->current_vol; u->new_size = geo->size; dprintf("imsm: reshape update preparation : OK\n"); *updatep = u; return update_memory_size; } /****************************************************************************** * function: imsm_create_metadata_update_for_migration() * Creates update for IMSM array. * ******************************************************************************/ static int imsm_create_metadata_update_for_migration( struct supertype *st, struct geo_params *geo, struct imsm_update_reshape_migration **updatep) { struct intel_super *super = st->sb; int update_memory_size = 0; struct imsm_update_reshape_migration *u = NULL; struct imsm_dev *dev; int previous_level = -1; dprintf("imsm_create_metadata_update_for_migration(enter)" " New Level = %i\n", geo->level); /* size of all update data without anchor */ update_memory_size = sizeof(struct imsm_update_reshape_migration); u = xcalloc(1, update_memory_size); u->type = update_reshape_migration; u->subdev = super->current_vol; u->new_level = geo->level; u->new_layout = geo->layout; u->new_raid_disks = u->old_raid_disks = geo->raid_disks; u->new_disks[0] = -1; u->new_chunksize = -1; dev = get_imsm_dev(super, u->subdev); if (dev) { struct imsm_map *map; map = get_imsm_map(dev, MAP_0); if (map) { int current_chunk_size = __le16_to_cpu(map->blocks_per_strip) / 2; if (geo->chunksize != current_chunk_size) { u->new_chunksize = geo->chunksize / 1024; dprintf("imsm: " "chunk size change from %i to %i\n", current_chunk_size, u->new_chunksize); } previous_level = map->raid_level; } } if ((geo->level == 5) && (previous_level == 0)) { struct mdinfo *spares = NULL; u->new_raid_disks++; spares = get_spares_for_grow(st); if ((spares == NULL) || (spares->array.spare_disks < 1)) { free(u); sysfs_free(spares); update_memory_size = 0; dprintf("error: cannot get spare device " "for requested migration"); return 0; } sysfs_free(spares); } dprintf("imsm: reshape update preparation : OK\n"); *updatep = u; return update_memory_size; } static void imsm_update_metadata_locally(struct supertype *st, void *buf, int len) { struct metadata_update mu; mu.buf = buf; mu.len = len; mu.space = NULL; mu.space_list = NULL; mu.next = NULL; imsm_prepare_update(st, &mu); imsm_process_update(st, &mu); while (mu.space_list) { void **space = mu.space_list; mu.space_list = *space; free(space); } } /*************************************************************************** * Function: imsm_analyze_change * Description: Function analyze change for single volume * and validate if transition is supported * Parameters: Geometry parameters, supertype structure, * metadata change direction (apply/rollback) * Returns: Operation type code on success, -1 if fail ****************************************************************************/ enum imsm_reshape_type imsm_analyze_change(struct supertype *st, struct geo_params *geo, int direction) { struct mdinfo info; int change = -1; int check_devs = 0; int chunk; /* number of added/removed disks in operation result */ int devNumChange = 0; /* imsm compatible layout value for array geometry verification */ int imsm_layout = -1; int data_disks; struct imsm_dev *dev; struct intel_super *super; unsigned long long current_size; unsigned long long free_size; unsigned long long max_size; int rv; getinfo_super_imsm_volume(st, &info, NULL); if ((geo->level != info.array.level) && (geo->level >= 0) && (geo->level != UnSet)) { switch (info.array.level) { case 0: if (geo->level == 5) { change = CH_MIGRATION; if (geo->layout != ALGORITHM_LEFT_ASYMMETRIC) { pr_err("Error. Requested Layout " "not supported (left-asymmetric layout " "is supported only)!\n"); change = -1; goto analyse_change_exit; } imsm_layout = geo->layout; check_devs = 1; devNumChange = 1; /* parity disk added */ } else if (geo->level == 10) { change = CH_TAKEOVER; check_devs = 1; devNumChange = 2; /* two mirrors added */ imsm_layout = 0x102; /* imsm supported layout */ } break; case 1: case 10: if (geo->level == 0) { change = CH_TAKEOVER; check_devs = 1; devNumChange = -(geo->raid_disks/2); imsm_layout = 0; /* imsm raid0 layout */ } break; } if (change == -1) { pr_err("Error. Level Migration from %d to %d " "not supported!\n", info.array.level, geo->level); goto analyse_change_exit; } } else geo->level = info.array.level; if ((geo->layout != info.array.layout) && ((geo->layout != UnSet) && (geo->layout != -1))) { change = CH_MIGRATION; if ((info.array.layout == 0) && (info.array.level == 5) && (geo->layout == 5)) { /* reshape 5 -> 4 */ } else if ((info.array.layout == 5) && (info.array.level == 5) && (geo->layout == 0)) { /* reshape 4 -> 5 */ geo->layout = 0; geo->level = 5; } else { pr_err("Error. Layout Migration from %d to %d " "not supported!\n", info.array.layout, geo->layout); change = -1; goto analyse_change_exit; } } else { geo->layout = info.array.layout; if (imsm_layout == -1) imsm_layout = info.array.layout; } if ((geo->chunksize > 0) && (geo->chunksize != UnSet) && (geo->chunksize != info.array.chunk_size)) change = CH_MIGRATION; else geo->chunksize = info.array.chunk_size; chunk = geo->chunksize / 1024; super = st->sb; dev = get_imsm_dev(super, super->current_vol); data_disks = imsm_num_data_members(dev , MAP_0); /* compute current size per disk member */ current_size = info.custom_array_size / data_disks; if ((geo->size > 0) && (geo->size != MAX_SIZE)) { /* align component size */ geo->size = imsm_component_size_aligment_check( get_imsm_raid_level(dev->vol.map), chunk * 1024, geo->size * 2); if (geo->size == 0) { pr_err("Error. Size expansion is " \ "supported only (current size is %llu, " \ "requested size /rounded/ is 0).\n", current_size); goto analyse_change_exit; } } if ((current_size != geo->size) && (geo->size > 0)) { if (change != -1) { pr_err("Error. Size change should be the only " "one at a time.\n"); change = -1; goto analyse_change_exit; } if ((super->current_vol + 1) != super->anchor->num_raid_devs) { pr_err("Error. The last volume in container " "can be expanded only (%i/%s).\n", super->current_vol, st->devnm); goto analyse_change_exit; } /* check the maximum available size */ rv = imsm_get_free_size(st, dev->vol.map->num_members, 0, chunk, &free_size); if (rv == 0) /* Cannot find maximum available space */ max_size = 0; else { max_size = free_size + current_size; /* align component size */ max_size = imsm_component_size_aligment_check( get_imsm_raid_level(dev->vol.map), chunk * 1024, max_size); } if (geo->size == MAX_SIZE) { /* requested size change to the maximum available size */ if (max_size == 0) { pr_err("Error. Cannot find " "maximum available space.\n"); change = -1; goto analyse_change_exit; } else geo->size = max_size; } if ((direction == ROLLBACK_METADATA_CHANGES)) { /* accept size for rollback only */ } else { /* round size due to metadata compatibility */ geo->size = (geo->size >> SECT_PER_MB_SHIFT) << SECT_PER_MB_SHIFT; dprintf("Prepare update for size change to %llu\n", geo->size ); if (current_size >= geo->size) { pr_err("Error. Size expansion is " "supported only (current size is %llu, " "requested size /rounded/ is %llu).\n", current_size, geo->size); goto analyse_change_exit; } if (max_size && geo->size > max_size) { pr_err("Error. Requested size is larger " "than maximum available size (maximum " "available size is %llu, " "requested size /rounded/ is %llu).\n", max_size, geo->size); goto analyse_change_exit; } } geo->size *= data_disks; geo->raid_disks = dev->vol.map->num_members; change = CH_ARRAY_SIZE; } if (!validate_geometry_imsm(st, geo->level, imsm_layout, geo->raid_disks + devNumChange, &chunk, geo->size, INVALID_SECTORS, 0, 0, 1)) change = -1; if (check_devs) { struct intel_super *super = st->sb; struct imsm_super *mpb = super->anchor; if (mpb->num_raid_devs > 1) { pr_err("Error. Cannot perform operation on %s" "- for this operation it MUST be single " "array in container\n", geo->dev_name); change = -1; } } analyse_change_exit: if ((direction == ROLLBACK_METADATA_CHANGES) && ((change == CH_MIGRATION) || (change == CH_TAKEOVER))) { dprintf("imsm: Metadata changes rollback is not supported for " "migration and takeover operations.\n"); change = -1; } return change; } int imsm_takeover(struct supertype *st, struct geo_params *geo) { struct intel_super *super = st->sb; struct imsm_update_takeover *u; u = xmalloc(sizeof(struct imsm_update_takeover)); u->type = update_takeover; u->subarray = super->current_vol; /* 10->0 transition */ if (geo->level == 0) u->direction = R10_TO_R0; /* 0->10 transition */ if (geo->level == 10) u->direction = R0_TO_R10; /* update metadata locally */ imsm_update_metadata_locally(st, u, sizeof(struct imsm_update_takeover)); /* and possibly remotely */ if (st->update_tail) append_metadata_update(st, u, sizeof(struct imsm_update_takeover)); else free(u); return 0; } static int imsm_reshape_super(struct supertype *st, unsigned long long size, int level, int layout, int chunksize, int raid_disks, int delta_disks, char *backup, char *dev, int direction, int verbose) { int ret_val = 1; struct geo_params geo; dprintf("imsm: reshape_super called.\n"); memset(&geo, 0, sizeof(struct geo_params)); geo.dev_name = dev; strcpy(geo.devnm, st->devnm); geo.size = size; geo.level = level; geo.layout = layout; geo.chunksize = chunksize; geo.raid_disks = raid_disks; if (delta_disks != UnSet) geo.raid_disks += delta_disks; dprintf("\tfor level : %i\n", geo.level); dprintf("\tfor raid_disks : %i\n", geo.raid_disks); if (experimental() == 0) return ret_val; if (strcmp(st->container_devnm, st->devnm) == 0) { /* On container level we can only increase number of devices. */ dprintf("imsm: info: Container operation\n"); int old_raid_disks = 0; if (imsm_reshape_is_allowed_on_container( st, &geo, &old_raid_disks, direction)) { struct imsm_update_reshape *u = NULL; int len; len = imsm_create_metadata_update_for_reshape( st, &geo, old_raid_disks, &u); if (len <= 0) { dprintf("imsm: Cannot prepare update\n"); goto exit_imsm_reshape_super; } ret_val = 0; /* update metadata locally */ imsm_update_metadata_locally(st, u, len); /* and possibly remotely */ if (st->update_tail) append_metadata_update(st, u, len); else free(u); } else { pr_err("(imsm) Operation " "is not allowed on this container\n"); } } else { /* On volume level we support following operations * - takeover: raid10 -> raid0; raid0 -> raid10 * - chunk size migration * - migration: raid5 -> raid0; raid0 -> raid5 */ struct intel_super *super = st->sb; struct intel_dev *dev = super->devlist; int change; dprintf("imsm: info: Volume operation\n"); /* find requested device */ while (dev) { char *devnm = imsm_find_array_devnm_by_subdev( dev->index, st->container_devnm); if (devnm && strcmp(devnm, geo.devnm) == 0) break; dev = dev->next; } if (dev == NULL) { pr_err("Cannot find %s (%s) subarray\n", geo.dev_name, geo.devnm); goto exit_imsm_reshape_super; } super->current_vol = dev->index; change = imsm_analyze_change(st, &geo, direction); switch (change) { case CH_TAKEOVER: ret_val = imsm_takeover(st, &geo); break; case CH_MIGRATION: { struct imsm_update_reshape_migration *u = NULL; int len = imsm_create_metadata_update_for_migration( st, &geo, &u); if (len < 1) { dprintf("imsm: " "Cannot prepare update\n"); break; } ret_val = 0; /* update metadata locally */ imsm_update_metadata_locally(st, u, len); /* and possibly remotely */ if (st->update_tail) append_metadata_update(st, u, len); else free(u); } break; case CH_ARRAY_SIZE: { struct imsm_update_size_change *u = NULL; int len = imsm_create_metadata_update_for_size_change( st, &geo, &u); if (len < 1) { dprintf("imsm: " "Cannot prepare update\n"); break; } ret_val = 0; /* update metadata locally */ imsm_update_metadata_locally(st, u, len); /* and possibly remotely */ if (st->update_tail) append_metadata_update(st, u, len); else free(u); } break; default: ret_val = 1; } } exit_imsm_reshape_super: dprintf("imsm: reshape_super Exit code = %i\n", ret_val); return ret_val; } /******************************************************************************* * Function: wait_for_reshape_imsm * Description: Function writes new sync_max value and waits until * reshape process reach new position * Parameters: * sra : general array info * ndata : number of disks in new array's layout * Returns: * 0 : success, * 1 : there is no reshape in progress, * -1 : fail ******************************************************************************/ int wait_for_reshape_imsm(struct mdinfo *sra, int ndata) { int fd = sysfs_get_fd(sra, NULL, "sync_completed"); unsigned long long completed; /* to_complete : new sync_max position */ unsigned long long to_complete = sra->reshape_progress; unsigned long long position_to_set = to_complete / ndata; if (fd < 0) { dprintf("imsm: wait_for_reshape_imsm() " "cannot open reshape_position\n"); return 1; } if (sysfs_fd_get_ll(fd, &completed) < 0) { dprintf("imsm: wait_for_reshape_imsm() " "cannot read reshape_position (no reshape in progres)\n"); close(fd); return 0; } if (completed > position_to_set) { dprintf("imsm: wait_for_reshape_imsm() " "wrong next position to set %llu (%llu)\n", to_complete, position_to_set); close(fd); return -1; } dprintf("Position set: %llu\n", position_to_set); if (sysfs_set_num(sra, NULL, "sync_max", position_to_set) != 0) { dprintf("imsm: wait_for_reshape_imsm() " "cannot set reshape position to %llu\n", position_to_set); close(fd); return -1; } do { char action[20]; sysfs_wait(fd, NULL); if (sysfs_get_str(sra, NULL, "sync_action", action, 20) > 0 && strncmp(action, "reshape", 7) != 0) break; if (sysfs_fd_get_ll(fd, &completed) < 0) { dprintf("imsm: wait_for_reshape_imsm() " "cannot read reshape_position (in loop)\n"); close(fd); return 1; } } while (completed < position_to_set); close(fd); return 0; } /******************************************************************************* * Function: check_degradation_change * Description: Check that array hasn't become failed. * Parameters: * info : for sysfs access * sources : source disks descriptors * degraded: previous degradation level * Returns: * degradation level ******************************************************************************/ int check_degradation_change(struct mdinfo *info, int *sources, int degraded) { unsigned long long new_degraded; int rv; rv = sysfs_get_ll(info, NULL, "degraded", &new_degraded); if ((rv == -1) || (new_degraded != (unsigned long long)degraded)) { /* check each device to ensure it is still working */ struct mdinfo *sd; new_degraded = 0; for (sd = info->devs ; sd ; sd = sd->next) { if (sd->disk.state & (1<<MD_DISK_FAULTY)) continue; if (sd->disk.state & (1<<MD_DISK_SYNC)) { char sbuf[20]; if (sysfs_get_str(info, sd, "state", sbuf, 20) < 0 || strstr(sbuf, "faulty") || strstr(sbuf, "in_sync") == NULL) { /* this device is dead */ sd->disk.state = (1<<MD_DISK_FAULTY); if (sd->disk.raid_disk >= 0 && sources[sd->disk.raid_disk] >= 0) { close(sources[ sd->disk.raid_disk]); sources[sd->disk.raid_disk] = -1; } new_degraded++; } } } } return new_degraded; } /******************************************************************************* * Function: imsm_manage_reshape * Description: Function finds array under reshape and it manages reshape * process. It creates stripes backups (if required) and sets * checheckpoits. * Parameters: * afd : Backup handle (nattive) - not used * sra : general array info * reshape : reshape parameters - not used * st : supertype structure * blocks : size of critical section [blocks] * fds : table of source device descriptor * offsets : start of array (offest per devices) * dests : not used * destfd : table of destination device descriptor * destoffsets : table of destination offsets (per device) * Returns: * 1 : success, reshape is done * 0 : fail ******************************************************************************/ static int imsm_manage_reshape( int afd, struct mdinfo *sra, struct reshape *reshape, struct supertype *st, unsigned long backup_blocks, int *fds, unsigned long long *offsets, int dests, int *destfd, unsigned long long *destoffsets) { int ret_val = 0; struct intel_super *super = st->sb; struct intel_dev *dv = NULL; struct imsm_dev *dev = NULL; struct imsm_map *map_src; int migr_vol_qan = 0; int ndata, odata; /* [bytes] */ int chunk; /* [bytes] */ struct migr_record *migr_rec; char *buf = NULL; unsigned int buf_size; /* [bytes] */ unsigned long long max_position; /* array size [bytes] */ unsigned long long next_step; /* [blocks]/[bytes] */ unsigned long long old_data_stripe_length; unsigned long long start_src; /* [bytes] */ unsigned long long start; /* [bytes] */ unsigned long long start_buf_shift; /* [bytes] */ int degraded = 0; int source_layout = 0; if (!fds || !offsets || !sra) goto abort; /* Find volume during the reshape */ for (dv = super->devlist; dv; dv = dv->next) { if (dv->dev->vol.migr_type == MIGR_GEN_MIGR && dv->dev->vol.migr_state == 1) { dev = dv->dev; migr_vol_qan++; } } /* Only one volume can migrate at the same time */ if (migr_vol_qan != 1) { pr_err(": %s", migr_vol_qan ? "Number of migrating volumes greater than 1\n" : "There is no volume during migrationg\n"); goto abort; } map_src = get_imsm_map(dev, MAP_1); if (map_src == NULL) goto abort; ndata = imsm_num_data_members(dev, MAP_0); odata = imsm_num_data_members(dev, MAP_1); chunk = __le16_to_cpu(map_src->blocks_per_strip) * 512; old_data_stripe_length = odata * chunk; migr_rec = super->migr_rec; /* initialize migration record for start condition */ if (sra->reshape_progress == 0) init_migr_record_imsm(st, dev, sra); else { if (__le32_to_cpu(migr_rec->rec_status) != UNIT_SRC_NORMAL) { dprintf("imsm: cannot restart migration when data " "are present in copy area.\n"); goto abort; } /* Save checkpoint to update migration record for current * reshape position (in md). It can be farther than current * reshape position in metadata. */ if (save_checkpoint_imsm(st, sra, UNIT_SRC_NORMAL) == 1) { /* ignore error == 2, this can mean end of reshape here */ dprintf("imsm: Cannot write checkpoint to " "migration record (UNIT_SRC_NORMAL, " "initial save)\n"); goto abort; } } /* size for data */ buf_size = __le32_to_cpu(migr_rec->blocks_per_unit) * 512; /* extend buffer size for parity disk */ buf_size += __le32_to_cpu(migr_rec->dest_depth_per_unit) * 512; /* add space for stripe aligment */ buf_size += old_data_stripe_length; if (posix_memalign((void **)&buf, 4096, buf_size)) { dprintf("imsm: Cannot allocate checpoint buffer\n"); goto abort; } max_position = sra->component_size * ndata; source_layout = imsm_level_to_layout(map_src->raid_level); while (__le32_to_cpu(migr_rec->curr_migr_unit) < __le32_to_cpu(migr_rec->num_migr_units)) { /* current reshape position [blocks] */ unsigned long long current_position = __le32_to_cpu(migr_rec->blocks_per_unit) * __le32_to_cpu(migr_rec->curr_migr_unit); unsigned long long border; /* Check that array hasn't become failed. */ degraded = check_degradation_change(sra, fds, degraded); if (degraded > 1) { dprintf("imsm: Abort reshape due to degradation" " level (%i)\n", degraded); goto abort; } next_step = __le32_to_cpu(migr_rec->blocks_per_unit); if ((current_position + next_step) > max_position) next_step = max_position - current_position; start = current_position * 512; /* allign reading start to old geometry */ start_buf_shift = start % old_data_stripe_length; start_src = start - start_buf_shift; border = (start_src / odata) - (start / ndata); border /= 512; if (border <= __le32_to_cpu(migr_rec->dest_depth_per_unit)) { /* save critical stripes to buf * start - start address of current unit * to backup [bytes] * start_src - start address of current unit * to backup alligned to source array * [bytes] */ unsigned long long next_step_filler = 0; unsigned long long copy_length = next_step * 512; /* allign copy area length to stripe in old geometry */ next_step_filler = ((copy_length + start_buf_shift) % old_data_stripe_length); if (next_step_filler) next_step_filler = (old_data_stripe_length - next_step_filler); dprintf("save_stripes() parameters: start = %llu," "\tstart_src = %llu,\tnext_step*512 = %llu," "\tstart_in_buf_shift = %llu," "\tnext_step_filler = %llu\n", start, start_src, copy_length, start_buf_shift, next_step_filler); if (save_stripes(fds, offsets, map_src->num_members, chunk, map_src->raid_level, source_layout, 0, NULL, start_src, copy_length + next_step_filler + start_buf_shift, buf)) { dprintf("imsm: Cannot save stripes" " to buffer\n"); goto abort; } /* Convert data to destination format and store it * in backup general migration area */ if (save_backup_imsm(st, dev, sra, buf + start_buf_shift, copy_length)) { dprintf("imsm: Cannot save stripes to " "target devices\n"); goto abort; } if (save_checkpoint_imsm(st, sra, UNIT_SRC_IN_CP_AREA)) { dprintf("imsm: Cannot write checkpoint to " "migration record (UNIT_SRC_IN_CP_AREA)\n"); goto abort; } } else { /* set next step to use whole border area */ border /= next_step; if (border > 1) next_step *= border; } /* When data backed up, checkpoint stored, * kick the kernel to reshape unit of data */ next_step = next_step + sra->reshape_progress; /* limit next step to array max position */ if (next_step > max_position) next_step = max_position; sysfs_set_num(sra, NULL, "suspend_lo", sra->reshape_progress); sysfs_set_num(sra, NULL, "suspend_hi", next_step); sra->reshape_progress = next_step; /* wait until reshape finish */ if (wait_for_reshape_imsm(sra, ndata) < 0) { dprintf("wait_for_reshape_imsm returned error!\n"); goto abort; } if (sigterm) goto abort; if (save_checkpoint_imsm(st, sra, UNIT_SRC_NORMAL) == 1) { /* ignore error == 2, this can mean end of reshape here */ dprintf("imsm: Cannot write checkpoint to " "migration record (UNIT_SRC_NORMAL)\n"); goto abort; } } /* return '1' if done */ ret_val = 1; abort: free(buf); abort_reshape(sra); return ret_val; } #endif /* MDASSEMBLE */ struct superswitch super_imsm = { #ifndef MDASSEMBLE .examine_super = examine_super_imsm, .brief_examine_super = brief_examine_super_imsm, .brief_examine_subarrays = brief_examine_subarrays_imsm, .export_examine_super = export_examine_super_imsm, .detail_super = detail_super_imsm, .brief_detail_super = brief_detail_super_imsm, .write_init_super = write_init_super_imsm, .validate_geometry = validate_geometry_imsm, .add_to_super = add_to_super_imsm, .remove_from_super = remove_from_super_imsm, .detail_platform = detail_platform_imsm, .export_detail_platform = export_detail_platform_imsm, .kill_subarray = kill_subarray_imsm, .update_subarray = update_subarray_imsm, .load_container = load_container_imsm, .default_geometry = default_geometry_imsm, .get_disk_controller_domain = imsm_get_disk_controller_domain, .reshape_super = imsm_reshape_super, .manage_reshape = imsm_manage_reshape, .recover_backup = recover_backup_imsm, .copy_metadata = copy_metadata_imsm, #endif .match_home = match_home_imsm, .uuid_from_super= uuid_from_super_imsm, .getinfo_super = getinfo_super_imsm, .getinfo_super_disks = getinfo_super_disks_imsm, .update_super = update_super_imsm, .avail_size = avail_size_imsm, .min_acceptable_spare_size = min_acceptable_spare_size_imsm, .compare_super = compare_super_imsm, .load_super = load_super_imsm, .init_super = init_super_imsm, .store_super = store_super_imsm, .free_super = free_super_imsm, .match_metadata_desc = match_metadata_desc_imsm, .container_content = container_content_imsm, .external = 1, .name = "imsm", #ifndef MDASSEMBLE /* for mdmon */ .open_new = imsm_open_new, .set_array_state= imsm_set_array_state, .set_disk = imsm_set_disk, .sync_metadata = imsm_sync_metadata, .activate_spare = imsm_activate_spare, .process_update = imsm_process_update, .prepare_update = imsm_prepare_update, #endif /* MDASSEMBLE */ };