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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/disk-io.c | |
| parent | 9f7c43c96727a53bea45f7f2549d897f0a6117b8 (diff) | |
| download | linux-3.10-c59021f846881a957ac5afe456d0f59d6a517b61.tar.gz linux-3.10-c59021f846881a957ac5afe456d0f59d6a517b61.tar.bz2 linux-3.10-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/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 8ecc5419d8b..b3fc8475870 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -2065,6 +2065,12 @@ struct btrfs_root *open_ctree(struct super_block *sb, fs_info->metadata_alloc_profile = (u64)-1; fs_info->system_alloc_profile = fs_info->metadata_alloc_profile; + ret = btrfs_init_space_info(fs_info); + if (ret) { + printk(KERN_ERR "Failed to initial space info: %d\n", ret); + goto fail_block_groups; + } + ret = btrfs_read_block_groups(extent_root); if (ret) { printk(KERN_ERR "Failed to read block groups: %d\n", ret); |