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src/linux-pmem.c
191 строка
6 KB
Peter Jones
Make the debug() code less intrusive
21 июн 2018, 22:36
21 июн 2018, 22:36
154d079
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/* * libefiboot - library for the manipulation of EFI boot variables * Copyright 2012-2018 Red Hat, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation; either version 2.1 of the * License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, see * <http://www.gnu.org/licenses/>. * */ #include "fix_coverity.h" #include <errno.h> #include <fcntl.h> #include <inttypes.h> #include <stdint.h> #include <unistd.h> #include "efiboot.h" /* * support NVDIMM-P (pmem / btt) devices * (does not include NVDIMM-${ANYTHING_ELSE}) * * /sys/dev/block/$major:$minor looks like: * 259:0 -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region9/btt9.0/block/pmem9s * 259:1 -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region11/btt11.0/block/pmem11s * 259:3 -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region11/btt11.0/block/pmem11s/pmem11s1 * * /sys/dev/block/259:0/device looks like: * device -> ../../../btt9.0 * /sys/dev/block/259:1/device looks like: * device -> ../../../btt11.0 * * /sys/dev/block/259:1/partition looks like: * $ cat partition * 1 * * /sys/dev/block/259:0/uuid looks like: * $ cat uuid * 6e54091e-7476-47ac-824b-b6dd69878661 * * pmem12s -> ../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/btt12.1/block/pmem12s * dev: 259:0 * device -> ../../../btt12.1 * device/uuid: 0cee166e-dd56-4bc2-99d2-2544b69025b8 * 259:0 -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/btt12.1/block/pmem12s * * pmem12.1s -> ../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/btt12.2/block/pmem12.1s * dev: 259:1 * device -> ../../../btt12.2 * device/uuid: 78d94521-91f7-47db-b3a7-51b764281940 * 259:1 -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/btt12.2/block/pmem12.1s * * pmem12.2 -> ../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/pfn12.1/block/pmem12.2 * dev: 259:2 * device -> ../../../pfn12.1 * device/uuid: 829c5205-89a5-4581-9819-df7d7754c622 * 259:2 -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/pfn12.1/block/pmem12.2 */ static ssize_t parse_pmem(struct device *dev, const char *current, const char *root UNUSED) { uint8_t *filebuf = NULL; uint8_t system, sysbus, acpi_id; uint16_t pnp_id; int ndbus, region, btt_region_id, btt_id, rc, pos; char *namespace = NULL; debug("entry"); if (!strcmp(dev->driver, "nd_pmem")) { ; #if 0 /* dunno */ } else if (!strcmp(dev->driver, "nd_blk")) { /* dunno */ dev->inteface_type = scsi; #endif } else { /* * not a pmem device */ return 0; } /* * We're not actually using any of the values here except pos (our * return value), but rather just being paranoid that this is the sort * of device we care about. * * 259:0 -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/btt12.1/block/pmem12s */ rc = sscanf(current, "../../devices/LNXSYSTM:%hhx/LNXSYBUS:%hhx/ACPI%hx:%hhx/ndbus%d/region%d/btt%d.%d/%n", &system, &sysbus, &pnp_id, &acpi_id, &ndbus, ®ion, &btt_region_id, &btt_id, &pos); if (rc < 8) return 0; /* * but the UUID we really do need to have. */ rc = read_sysfs_file(&filebuf, "class/block/%s/device/namespace", dev->disk_name); if ((rc < 0 && errno == ENOENT) || filebuf == NULL) return -1; rc = sscanf((char *)filebuf, "%ms[^\n]\n", &namespace); if (rc != 1 || namespace == NULL) return -1; filebuf = NULL; debug("nvdimm namespace is \"%s\"", namespace); rc = read_sysfs_file(&filebuf, "bus/nd/devices/%s/uuid", namespace); free(namespace); if (rc < 0 || filebuf == NULL) return -1; rc = efi_str_to_guid((char *)filebuf, &dev->nvdimm_info.namespace_label); if (rc < 0) return -1; filebuf = NULL; rc = read_sysfs_file(&filebuf, "class/block/%s/device/uuid", dev->disk_name); if (rc < 0 || filebuf == NULL) return -1; rc = efi_str_to_guid((char *)filebuf, &dev->nvdimm_info.nvdimm_label); if (rc < 0) return -1; /* * Right now it's not clear what encoding NVDIMM($uuid) gets in the * binary format, so this will be in the mixed endian format EFI GUIDs * are in (33221100-1100-1100-0011-223344556677) unless you set this * variable. */ if (getenv("LIBEFIBOOT_SWIZZLE_PMEM_UUID") != NULL) { swizzle_guid_to_uuid(&dev->nvdimm_info.namespace_label); swizzle_guid_to_uuid(&dev->nvdimm_info.nvdimm_label); } dev->interface_type = nd_pmem; return pos; } static ssize_t dp_create_pmem(struct device *dev, uint8_t *buf, ssize_t size, ssize_t off) { ssize_t sz, sz1; debug("entry"); sz = efidp_make_nvdimm(buf + off, size ? size - off : 0, &dev->nvdimm_info.namespace_label); if (sz < 0) return sz; off += sz; sz1 = efidp_make_nvdimm(buf + off, size ? size - off : 0, &dev->nvdimm_info.nvdimm_label); if (sz1 < 0) return sz1; return sz + sz1; } enum interface_type pmem_iftypes[] = { nd_pmem, unknown }; struct dev_probe HIDDEN pmem_parser = { .name = "pmem", .iftypes = pmem_iftypes, .flags = DEV_PROVIDES_ROOT|DEV_PROVIDES_HD, .parse = parse_pmem, .create = dp_create_pmem, };