diff options
Diffstat (limited to 'shlibs/blkid/src/probers/zfs.c')
| -rw-r--r-- | shlibs/blkid/src/probers/zfs.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/shlibs/blkid/src/probers/zfs.c b/shlibs/blkid/src/probers/zfs.c new file mode 100644 index 00000000..7d39034f --- /dev/null +++ b/shlibs/blkid/src/probers/zfs.c @@ -0,0 +1,66 @@ +/* + * Copyright (C) 2009 by Andreas Dilger <adilger@sun.com> + * + * 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 <errno.h> +#include <ctype.h> +#include <inttypes.h> + +#include "blkidP.h" + +/* #include <sys/uberblock_impl.h> */ +#define UBERBLOCK_MAGIC 0x00bab10c /* oo-ba-bloc! */ +struct zfs_uberblock { + uint64_t ub_magic; /* UBERBLOCK_MAGIC */ + uint64_t ub_version; /* SPA_VERSION */ + uint64_t ub_txg; /* txg of last sync */ + uint64_t ub_guid_sum; /* sum of all vdev guids */ + uint64_t ub_timestamp; /* UTC time of last sync */ + /*blkptr_t ub_rootbp;*/ /* MOS objset_phys_t */ +}; + +static int probe_zfs(blkid_probe pr, const struct blkid_idmag *mag) +{ + struct zfs_uberblock *ub; + int swab_endian; + uint64_t spa_version; + + ub = blkid_probe_get_sb(pr, mag, struct zfs_uberblock); + if (!ub) + return -1; + + swab_endian = (ub->ub_magic == swab64(UBERBLOCK_MAGIC)); + spa_version = swab_endian ? swab64(ub->ub_version) : ub->ub_version; + + blkid_probe_sprintf_version(pr, "%" PRIu64, spa_version); +#if 0 + /* read nvpair data for pool name, pool GUID from the MOS, but + * unfortunately this is more complex than it could be */ + blkid_probe_set_label(pr, pool_name, pool_len)); + blkid_probe_set_uuid(pr, pool_guid); +#endif + return 0; +} + +const struct blkid_idinfo zfs_idinfo = +{ + .name = "zfs", + .usage = BLKID_USAGE_FILESYSTEM, + .probefunc = probe_zfs, + .magics = + { + { .magic = "\0\0\x02\xf5\xb0\x07\xb1\x0c", .len = 8, .kboff = 8 }, + { .magic = "\x1c\xb1\x07\xb0\xf5\x02\0\0", .len = 8, .kboff = 8 }, + { .magic = "\0\0\x02\xf5\xb0\x07\xb1\x0c", .len = 8, .kboff = 264 }, + { .magic = "\x0c\xb1\x07\xb0\xf5\x02\0\0", .len = 8, .kboff = 264 }, + { NULL } + } +}; + |