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| author | Dave Kleikamp | 2013-05-01 18:08:38 +0200 |
|---|---|---|
| committer | Dave Kleikamp | 2013-05-01 18:16:59 +0200 |
| commit | 73aaa22d5ffb2630456bac2f9a4ed9b81d0d7271 (patch) | |
| tree | 8c5a187306f27ba618a077c5b5a3c0b2e2f7712f /fs/jfs/inode.c | |
| parent | jfs: avoid undefined behavior from left-shifting by 32 bits (diff) | |
| download | kernel-qcow2-linux-73aaa22d5ffb2630456bac2f9a4ed9b81d0d7271.tar.gz kernel-qcow2-linux-73aaa22d5ffb2630456bac2f9a4ed9b81d0d7271.tar.xz kernel-qcow2-linux-73aaa22d5ffb2630456bac2f9a4ed9b81d0d7271.zip | |
jfs: fix a couple races
This patch fixes races uncovered by xfstests testcase 068.
One race is the result of jfs_sync() trying to write a sync point to the
journal after it has been frozen (or possibly in the process). Since
freezing sync's the journal, there is no need to write a sync point so
we simply want to return.
The second involves jfs_write_inode() being called on a deleted inode.
It calls jfs_flush_journal which is held up by the jfs_commit thread
doing the final iput on the same deleted inode, which itself is
waiting for the I_SYNC flag to be cleared. jfs_write_inode need not
do anything when i_nlink is zero, which is the easy fix.
Reported-by: Michael L. Semon <mlsemon35@gmail.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Diffstat (limited to 'fs/jfs/inode.c')
| -rw-r--r-- | fs/jfs/inode.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c index b7dc47ba675e..77554b61d124 100644 --- a/fs/jfs/inode.c +++ b/fs/jfs/inode.c @@ -125,7 +125,7 @@ int jfs_write_inode(struct inode *inode, struct writeback_control *wbc) { int wait = wbc->sync_mode == WB_SYNC_ALL; - if (test_cflag(COMMIT_Nolink, inode)) + if (inode->i_nlink == 0) return 0; /* * If COMMIT_DIRTY is not set, the inode isn't really dirty. |