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libblkid/src/superblocks/mpool.c
62 строки
1 KB
Thomas Weißschuh
libblkid: constify return values of blkid_probe_get_sb
12 янв 2024, 09:54
12 янв 2024, 09:54
4583e6b
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/* * Copyright (C) 2016 Micron Technology, Inc. * * This file may be redistributed under the terms of the * GNU Lesser General Public License. */ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <stdint.h> #include "crc32c.h" #include "superblocks.h" #define MAX_MPOOL_NAME_LEN 32 struct omf_sb_descriptor { uint64_t osb_magic; uint8_t osb_name[MAX_MPOOL_NAME_LEN]; unsigned char osb_poolid[16]; /* UUID of pool this drive belongs to */ uint16_t osb_vers; uint32_t osb_gen; uint32_t osb_cksum1; /* crc32c of the preceding fields */ } __attribute__((packed)); static int probe_mpool(blkid_probe pr, const struct blkid_idmag *mag) { const struct omf_sb_descriptor *osd; uint32_t sb_crc; osd = blkid_probe_get_sb(pr, mag, struct omf_sb_descriptor); if (!osd) return errno ? -errno : 1; sb_crc = crc32c(~0L, (const void *)osd, offsetof(struct omf_sb_descriptor, osb_cksum1)); sb_crc ^= ~0L; if (!blkid_probe_verify_csum(pr, sb_crc, le32_to_cpu(osd->osb_cksum1))) return 1; blkid_probe_set_label(pr, osd->osb_name, sizeof(osd->osb_name)); blkid_probe_set_uuid(pr, osd->osb_poolid); return 0; } /* "mpoolDev" in ASCII */ #define MPOOL_SB_MAGIC "\x6D\x70\x6f\x6f\x6c\x44\x65\x76" const struct blkid_idinfo mpool_idinfo = { .name = "mpool", .usage = BLKID_USAGE_FILESYSTEM, .probefunc = probe_mpool, .magics = { { .magic = MPOOL_SB_MAGIC, .len = 8}, { NULL } } };