diff options
| author | Qu Wenruo <quwenruo@cn.fujitsu.com> | 2015-08-03 08:44:29 +0200 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2015-08-06 23:51:15 +0200 |
| commit | c05f9429e12da7c7de2649ef8c8c16bf8c12061f (patch) | |
| tree | 42910e60d57a14d0989a49daa9010cc087d0f1ae /fs | |
| parent | Btrfs: fix quick exhaustion of the system array in the superblock (diff) | |
| download | linux-c05f9429e12da7c7de2649ef8c8c16bf8c12061f.tar.xz linux-c05f9429e12da7c7de2649ef8c8c16bf8c12061f.zip | |
btrfs: qgroup: Fix a regression in qgroup reserved space.
During the change to new btrfs extent-oriented qgroup implement, due to
it doesn't use the old __qgroup_excl_accounting() for exclusive extent,
it didn't free the reserved bytes.
The bug will cause limit function go crazy as the reserved space is
never freed, increasing limit will have no effect and still cause
EQOUT.
The fix is easy, just free reserved bytes for newly created exclusive
extent as what it does before.
Reported-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Yang Dongsheng <yangds.fnst@cn.fujitsu.com>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/qgroup.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index e9ace099162c..8a8202956576 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -1651,6 +1651,11 @@ static int qgroup_update_counters(struct btrfs_fs_info *fs_info, /* Exclusive -> exclusive, nothing changed */ } } + + /* For exclusive extent, free its reserved bytes too */ + if (nr_old_roots == 0 && nr_new_roots == 1 && + cur_new_count == nr_new_roots) + qg->reserved -= num_bytes; if (dirty) qgroup_dirty(fs_info, qg); } |