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xfs: flush outstanding buffers on log mount failure

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When we fail to mount the log in xfs_mountfs(), we tear down all the
infrastructure we have already allocated. However, the process of
mounting the log may have progressed to the point of reading,
caching and modifying buffers in memory. Hence before we can free
all the infrastructure, we have to flush and remove all the buffers
from memory.

Problem first reported by Eric Sandeen, later a different incarnation
was reported by Ben Myers.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Dave Chinner 2012-04-23 15:59:06 +10:00 committed by Ben Myers
parent 12bcb3f7d4
commit d4f3512b08
1 changed files with 6 additions and 2 deletions
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8
fs/xfs/xfs_mount.c
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@ -1288,7 +1288,7 @@ xfs_mountfs(
XFS_FSB_TO_BB(mp, sbp->sb_logblocks));
if (error) {
xfs_warn(mp, "log mount failed");
goto out_free_perag;
goto out_fail_wait;
}
/*
@ -1315,7 +1315,7 @@ xfs_mountfs(
!mp->m_sb.sb_inprogress) {
error = xfs_initialize_perag_data(mp, sbp->sb_agcount);
if (error)
goto out_free_perag;
goto out_fail_wait;
}
/*
@ -1439,6 +1439,10 @@ xfs_mountfs(
IRELE(rip);
out_log_dealloc:
xfs_log_unmount(mp);
out_fail_wait:
if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp)
xfs_wait_buftarg(mp->m_logdev_targp);
xfs_wait_buftarg(mp->m_ddev_targp);
out_free_perag:
xfs_free_perag(mp);
out_remove_uuid: