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authorDarrick J. Wong <darrick.wong@oracle.com>2017-08-18 18:08:25 -0700
committerDarrick J. Wong <darrick.wong@oracle.com>2017-09-01 10:55:30 -0700
commit799ea9e9c59949008770aab4e1da87f10e99dbe4 (patch)
treea61a76330a6c6a1a45139df2afa9d2b4b2aee6fa /fs/xfs/xfs_log.c
parent2d32311cf19bfb8c1d2b4601974ddd951f9cfd0b (diff)
downloadlinux-799ea9e9c59949008770aab4e1da87f10e99dbe4.tar.bz2
xfs: evict all inodes involved with log redo item
When we introduced the bmap redo log items, we set MS_ACTIVE on the mountpoint and XFS_IRECOVERY on the inode to prevent unlinked inodes from being truncated prematurely during log recovery. This also had the effect of putting linked inodes on the lru instead of evicting them. Unfortunately, we neglected to find all those unreferenced lru inodes and evict them after finishing log recovery, which means that we leak them if anything goes wrong in the rest of xfs_mountfs, because the lru is only cleaned out on unmount. Therefore, evict unreferenced inodes in the lru list immediately after clearing MS_ACTIVE. Fixes: 17c12bcd30 ("xfs: when replaying bmap operations, don't let unlinked inodes get reaped") Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Cc: viro@ZenIV.linux.org.uk Reviewed-by: Brian Foster <bfoster@redhat.com>
Diffstat (limited to 'fs/xfs/xfs_log.c')
-rw-r--r--fs/xfs/xfs_log.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index f467f1230444..bcb2f860e508 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -761,12 +761,24 @@ xfs_log_mount_finish(
* inodes. Turn it off immediately after recovery finishes
* so that we don't leak the quota inodes if subsequent mount
* activities fail.
+ *
+ * We let all inodes involved in redo item processing end up on
+ * the LRU instead of being evicted immediately so that if we do
+ * something to an unlinked inode, the irele won't cause
+ * premature truncation and freeing of the inode, which results
+ * in log recovery failure. We have to evict the unreferenced
+ * lru inodes after clearing MS_ACTIVE because we don't
+ * otherwise clean up the lru if there's a subsequent failure in
+ * xfs_mountfs, which leads to us leaking the inodes if nothing
+ * else (e.g. quotacheck) references the inodes before the
+ * mount failure occurs.
*/
mp->m_super->s_flags |= MS_ACTIVE;
error = xlog_recover_finish(mp->m_log);
if (!error)
xfs_log_work_queue(mp);
mp->m_super->s_flags &= ~MS_ACTIVE;
+ evict_inodes(mp->m_super);
if (readonly)
mp->m_flags |= XFS_MOUNT_RDONLY;