xfs: fix up quotacheck buffer list error handling
commit 20e8a06378
upstream.
The quotacheck error handling of the delwri buffer list assumes the
resident buffers are locked and doesn't clear the _XBF_DELWRI_Q flag
on the buffers that are dequeued. This can lead to assert failures
on buffer release and possibly other locking problems.
Move this code to a delwri queue cancel helper function to
encapsulate the logic required to properly release buffers from a
delwri queue. Update the helper to clear the delwri queue flag and
call it from quotacheck.
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
95487d4be1
commit
10f0b2c3c2
|
@ -1066,6 +1066,8 @@ void
|
|||
xfs_buf_unlock(
|
||||
struct xfs_buf *bp)
|
||||
{
|
||||
ASSERT(xfs_buf_islocked(bp));
|
||||
|
||||
XB_CLEAR_OWNER(bp);
|
||||
up(&bp->b_sema);
|
||||
|
||||
|
@ -1803,6 +1805,28 @@ error:
|
|||
return NULL;
|
||||
}
|
||||
|
||||
/*
|
||||
* Cancel a delayed write list.
|
||||
*
|
||||
* Remove each buffer from the list, clear the delwri queue flag and drop the
|
||||
* associated buffer reference.
|
||||
*/
|
||||
void
|
||||
xfs_buf_delwri_cancel(
|
||||
struct list_head *list)
|
||||
{
|
||||
struct xfs_buf *bp;
|
||||
|
||||
while (!list_empty(list)) {
|
||||
bp = list_first_entry(list, struct xfs_buf, b_list);
|
||||
|
||||
xfs_buf_lock(bp);
|
||||
bp->b_flags &= ~_XBF_DELWRI_Q;
|
||||
list_del_init(&bp->b_list);
|
||||
xfs_buf_relse(bp);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Add a buffer to the delayed write list.
|
||||
*
|
||||
|
|
|
@ -329,6 +329,7 @@ extern void *xfs_buf_offset(struct xfs_buf *, size_t);
|
|||
extern void xfs_buf_stale(struct xfs_buf *bp);
|
||||
|
||||
/* Delayed Write Buffer Routines */
|
||||
extern void xfs_buf_delwri_cancel(struct list_head *);
|
||||
extern bool xfs_buf_delwri_queue(struct xfs_buf *, struct list_head *);
|
||||
extern int xfs_buf_delwri_submit(struct list_head *);
|
||||
extern int xfs_buf_delwri_submit_nowait(struct list_head *);
|
||||
|
|
|
@ -1384,12 +1384,7 @@ xfs_qm_quotacheck(
|
|||
mp->m_qflags |= flags;
|
||||
|
||||
error_return:
|
||||
while (!list_empty(&buffer_list)) {
|
||||
struct xfs_buf *bp =
|
||||
list_first_entry(&buffer_list, struct xfs_buf, b_list);
|
||||
list_del_init(&bp->b_list);
|
||||
xfs_buf_relse(bp);
|
||||
}
|
||||
xfs_buf_delwri_cancel(&buffer_list);
|
||||
|
||||
if (error) {
|
||||
xfs_warn(mp,
|
||||
|
|
Loading…
Reference in a new issue