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author | John Groves | 2017-11-16 06:01:39 +0100 |
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committer | Karel Zak | 2017-11-16 11:44:52 +0100 |
commit | b0a89709bfef495084381f8cc8948921d2e04ae5 (patch) | |
tree | 97bdb79e90c7701564222e79facc00aa4125016b /libblkid/src/superblocks/mpool.c | |
parent | lib: Add simple crc32c() function (diff) | |
download | kernel-qcow2-util-linux-b0a89709bfef495084381f8cc8948921d2e04ae5.tar.gz kernel-qcow2-util-linux-b0a89709bfef495084381f8cc8948921d2e04ae5.tar.xz kernel-qcow2-util-linux-b0a89709bfef495084381f8cc8948921d2e04ae5.zip |
libblkid: Add support for Micron mpool formatted drives
Signed-off-by: Karel Zak <kzak@redhat.com>
Diffstat (limited to 'libblkid/src/superblocks/mpool.c')
-rw-r--r-- | libblkid/src/superblocks/mpool.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/libblkid/src/superblocks/mpool.c b/libblkid/src/superblocks/mpool.c new file mode 100644 index 000000000..5f30fd496 --- /dev/null +++ b/libblkid/src/superblocks/mpool.c @@ -0,0 +1,66 @@ +/* + * 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" + +#include <uuid.h> + +#define MAX_MPOOL_NAME_LEN 32 + +struct omf_sb_descriptor { + uint64_t osb_magic; + uint8_t osb_name[MAX_MPOOL_NAME_LEN]; + uuid_t osb_poolid; /* 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) +{ + 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, 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; +} + +/** + * Superblock (sb) -- magic = ASCII "mpoolDev" + */ +#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 } + } +}; |