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ceph: fix decoding of pool snap info

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The pool info contains a vector for snap_info_t, not snap ids.  This fixes
the broken decoding, which would declare teh update corrupt when a pool
snapshot was created.

Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil 2010-08-02 11:00:55 -07:00
parent 2d9c98ae97
commit 73a7e693f9
1 changed files with 26 additions and 4 deletions
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30
fs/ceph/osdmap.c
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@ -424,12 +424,30 @@ static void __remove_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *pi)
kfree(pi);
}
static void __decode_pool(void **p, struct ceph_pg_pool_info *pi)
static int __decode_pool(void **p, void *end, struct ceph_pg_pool_info *pi)
{
unsigned n, m;
ceph_decode_copy(p, &pi->v, sizeof(pi->v));
calc_pg_masks(pi);
*p += le32_to_cpu(pi->v.num_snaps) * sizeof(u64);
/* num_snaps * snap_info_t */
n = le32_to_cpu(pi->v.num_snaps);
while (n--) {
ceph_decode_need(p, end, sizeof(u64) + 1 + sizeof(u64) +
sizeof(struct ceph_timespec), bad);
*p += sizeof(u64) + /* key */
1 + sizeof(u64) + /* u8, snapid */
sizeof(struct ceph_timespec);
m = ceph_decode_32(p); /* snap name */
*p += m;
}
*p += le32_to_cpu(pi->v.num_removed_snap_intervals) * sizeof(u64) * 2;
return 0;
bad:
return -EINVAL;
}
static int __decode_pool_names(void **p, void *end, struct ceph_osdmap *map)
@ -571,7 +589,9 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end)
kfree(pi);
goto bad;
}
__decode_pool(p, pi);
err = __decode_pool(p, end, pi);
if (err < 0)
goto bad;
__insert_pg_pool(&map->pg_pools, pi);
}
@ -760,7 +780,9 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
pi->id = pool;
__insert_pg_pool(&map->pg_pools, pi);
}
__decode_pool(p, pi);
err = __decode_pool(p, end, pi);
if (err < 0)
goto bad;
}
if (version >= 5 && __decode_pool_names(p, end, map) < 0)
goto bad;