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| author | Liu Bo <bo.li.liu@oracle.com> | 2016-08-25 18:08:27 -0700 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2016-09-26 17:59:49 +0200 |
| commit | 49303381f19ab16a371a061b67e783d3f570d56e (patch) | |
| tree | c70a9224882d29c4a6d6a68a53343517c2bc0e0e | |
| parent | 2571e739677f1e4c0c63f5ed49adcc0857923625 (diff) | |
| download | blackbird-op-linux-49303381f19ab16a371a061b67e783d3f570d56e.tar.gz blackbird-op-linux-49303381f19ab16a371a061b67e783d3f570d56e.zip | |
Btrfs: bail out if block group has different mixed flag
Currently we allow inconsistence about mixed flag
(BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA).
We'd get ENOSPC if block group has mixed flag and btrfs doesn't.
If that happens, we have one space_info with mixed flag and another
space_info only with BTRFS_BLOCK_GROUP_METADATA, and
global_block_rsv.space_info points to the latter one, but all bytes
from block_group contributes to the mixed space_info, thus all the
allocation will fail with ENOSPC.
This adds a check for the above case.
Reported-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
[ updated message ]
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
| -rw-r--r-- | fs/btrfs/extent-tree.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 616c45580c23..ff8026e2374f 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -10129,6 +10129,11 @@ int btrfs_read_block_groups(struct btrfs_root *root) struct extent_buffer *leaf; int need_clear = 0; u64 cache_gen; + u64 feature; + int mixed; + + feature = btrfs_super_incompat_flags(info->super_copy); + mixed = !!(feature & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS); root = info->extent_root; key.objectid = 0; @@ -10182,6 +10187,15 @@ int btrfs_read_block_groups(struct btrfs_root *root) btrfs_item_ptr_offset(leaf, path->slots[0]), sizeof(cache->item)); cache->flags = btrfs_block_group_flags(&cache->item); + if (!mixed && + ((cache->flags & BTRFS_BLOCK_GROUP_METADATA) && + (cache->flags & BTRFS_BLOCK_GROUP_DATA))) { + btrfs_err(info, +"bg %llu is a mixed block group but filesystem hasn't enabled mixed block groups", + cache->key.objectid); + ret = -EINVAL; + goto error; + } key.objectid = found_key.objectid + found_key.offset; btrfs_release_path(path); |
