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| author | liubo <liubo2009@cn.fujitsu.com> | 2011-03-07 02:13:14 +0000 |
|---|---|---|
| committer | root <Chris Mason chris.mason@oracle.com> | 2011-03-28 05:37:53 -0400 |
| commit | c59021f846881a957ac5afe456d0f59d6a517b61 (patch) | |
| tree | 63e0552f2850b55dcc6bde31e0610e5f22046675 /fs/btrfs/extent-tree.c | |
| parent | 9f7c43c96727a53bea45f7f2549d897f0a6117b8 (diff) | |
| download | blackbird-op-linux-c59021f846881a957ac5afe456d0f59d6a517b61.tar.gz blackbird-op-linux-c59021f846881a957ac5afe456d0f59d6a517b61.zip | |
Btrfs: fix OOPS of empty filesystem after balance
btrfs will remove unused block groups after balance.
When a empty filesystem is balanced, the block group with tag "DATA" may be
dropped, and after umount and mount again, it will not find "DATA" space_info
and lead to OOPS.
So we initial the necessary space_infos(DATA, SYSTEM, METADATA) to avoid OOPS.
Reported-by: Daniel J Blueman <daniel.blueman@gmail.com>
Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/extent-tree.c')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index a561060f5ffb..f619c3cb13b7 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -8778,6 +8778,29 @@ out: return ret; } +int btrfs_init_space_info(struct btrfs_fs_info *fs_info) +{ + struct btrfs_space_info *space_info; + int ret; + + ret = update_space_info(fs_info, BTRFS_BLOCK_GROUP_SYSTEM, 0, 0, + &space_info); + if (ret) + return ret; + + ret = update_space_info(fs_info, BTRFS_BLOCK_GROUP_METADATA, 0, 0, + &space_info); + if (ret) + return ret; + + ret = update_space_info(fs_info, BTRFS_BLOCK_GROUP_DATA, 0, 0, + &space_info); + if (ret) + return ret; + + return ret; +} + int btrfs_error_unpin_extent_range(struct btrfs_root *root, u64 start, u64 end) { return unpin_extent_range(root, start, end); |
