diff options
Diffstat (limited to 'fs/xfs/xfs_buf.c')
| -rw-r--r-- | fs/xfs/xfs_buf.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c index e6f3cb9ef55a..a9c8e72e12a4 100644 --- a/fs/xfs/xfs_buf.c +++ b/fs/xfs/xfs_buf.c @@ -2055,6 +2055,33 @@ xfs_buf_delwri_queue( } /* + * Queue a buffer to this delwri list as part of a data integrity operation. + * If the buffer is on any other delwri list, we'll wait for that to clear + * so that the caller can submit the buffer for IO and wait for the result. + * Callers must ensure the buffer is not already on the list. + */ +void +xfs_buf_delwri_queue_here( + struct xfs_buf *bp, + struct list_head *buffer_list) +{ + /* + * We need this buffer to end up on the /caller's/ delwri list, not any + * old list. This can happen if the buffer is marked stale (which + * clears DELWRI_Q) after the AIL queues the buffer to its list but + * before the AIL has a chance to submit the list. + */ + while (!list_empty(&bp->b_list)) { + xfs_buf_unlock(bp); + delay(1); + xfs_buf_lock(bp); + } + + ASSERT(!(bp->b_flags & _XBF_DELWRI_Q)); + xfs_buf_delwri_queue(bp, buffer_list); +} + +/* * Compare function is more complex than it needs to be because * the return value is only 32 bits and we are doing comparisons * on 64 bit values |