diff options
Diffstat (limited to 'fs/xfs/xfs_buf_item.c')
-rw-r--r-- | fs/xfs/xfs_buf_item.c | 96 |
1 files changed, 26 insertions, 70 deletions
diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c index 3a0bc38..fb20f38 100644 --- a/fs/xfs/xfs_buf_item.c +++ b/fs/xfs/xfs_buf_item.c @@ -418,7 +418,6 @@ xfs_buf_item_unpin( if (freed && stale) { ASSERT(bip->bli_flags & XFS_BLI_STALE); ASSERT(xfs_buf_islocked(bp)); - ASSERT(!(XFS_BUF_ISDELAYWRITE(bp))); ASSERT(XFS_BUF_ISSTALE(bp)); ASSERT(bip->bli_format.blf_flags & XFS_BLF_CANCEL); @@ -469,34 +468,28 @@ xfs_buf_item_unpin( } } -/* - * This is called to attempt to lock the buffer associated with this - * buf log item. Don't sleep on the buffer lock. If we can't get - * the lock right away, return 0. If we can get the lock, take a - * reference to the buffer. If this is a delayed write buffer that - * needs AIL help to be written back, invoke the pushbuf routine - * rather than the normal success path. - */ STATIC uint -xfs_buf_item_trylock( - struct xfs_log_item *lip) +xfs_buf_item_push( + struct xfs_log_item *lip, + struct list_head *buffer_list) { struct xfs_buf_log_item *bip = BUF_ITEM(lip); struct xfs_buf *bp = bip->bli_buf; + uint rval = XFS_ITEM_SUCCESS; if (xfs_buf_ispinned(bp)) return XFS_ITEM_PINNED; if (!xfs_buf_trylock(bp)) return XFS_ITEM_LOCKED; - /* take a reference to the buffer. */ - xfs_buf_hold(bp); - ASSERT(!(bip->bli_flags & XFS_BLI_STALE)); - trace_xfs_buf_item_trylock(bip); - if (XFS_BUF_ISDELAYWRITE(bp)) - return XFS_ITEM_PUSHBUF; - return XFS_ITEM_SUCCESS; + + trace_xfs_buf_item_push(bip); + + if (!xfs_buf_delwri_queue(bp, buffer_list)) + rval = XFS_ITEM_FLUSHING; + xfs_buf_unlock(bp); + return rval; } /* @@ -609,48 +602,6 @@ xfs_buf_item_committed( return lsn; } -/* - * The buffer is locked, but is not a delayed write buffer. - */ -STATIC void -xfs_buf_item_push( - struct xfs_log_item *lip) -{ - struct xfs_buf_log_item *bip = BUF_ITEM(lip); - struct xfs_buf *bp = bip->bli_buf; - - ASSERT(!(bip->bli_flags & XFS_BLI_STALE)); - ASSERT(!XFS_BUF_ISDELAYWRITE(bp)); - - trace_xfs_buf_item_push(bip); - - xfs_buf_delwri_queue(bp); - xfs_buf_relse(bp); -} - -/* - * The buffer is locked and is a delayed write buffer. Promote the buffer - * in the delayed write queue as the caller knows that they must invoke - * the xfsbufd to get this buffer written. We have to unlock the buffer - * to allow the xfsbufd to write it, too. - */ -STATIC bool -xfs_buf_item_pushbuf( - struct xfs_log_item *lip) -{ - struct xfs_buf_log_item *bip = BUF_ITEM(lip); - struct xfs_buf *bp = bip->bli_buf; - - ASSERT(!(bip->bli_flags & XFS_BLI_STALE)); - ASSERT(XFS_BUF_ISDELAYWRITE(bp)); - - trace_xfs_buf_item_pushbuf(bip); - - xfs_buf_delwri_promote(bp); - xfs_buf_relse(bp); - return true; -} - STATIC void xfs_buf_item_committing( struct xfs_log_item *lip, @@ -666,11 +617,9 @@ static const struct xfs_item_ops xfs_buf_item_ops = { .iop_format = xfs_buf_item_format, .iop_pin = xfs_buf_item_pin, .iop_unpin = xfs_buf_item_unpin, - .iop_trylock = xfs_buf_item_trylock, .iop_unlock = xfs_buf_item_unlock, .iop_committed = xfs_buf_item_committed, .iop_push = xfs_buf_item_push, - .iop_pushbuf = xfs_buf_item_pushbuf, .iop_committing = xfs_buf_item_committing }; @@ -989,20 +938,27 @@ xfs_buf_iodone_callbacks( * If the write was asynchronous then no one will be looking for the * error. Clear the error state and write the buffer out again. * - * During sync or umount we'll write all pending buffers again - * synchronous, which will catch these errors if they keep hanging - * around. + * XXX: This helps against transient write errors, but we need to find + * a way to shut the filesystem down if the writes keep failing. + * + * In practice we'll shut the filesystem down soon as non-transient + * erorrs tend to affect the whole device and a failing log write + * will make us give up. But we really ought to do better here. */ if (XFS_BUF_ISASYNC(bp)) { + ASSERT(bp->b_iodone != NULL); + + trace_xfs_buf_item_iodone_async(bp, _RET_IP_); + xfs_buf_ioerror(bp, 0); /* errno of 0 unsets the flag */ if (!XFS_BUF_ISSTALE(bp)) { - xfs_buf_delwri_queue(bp); - XFS_BUF_DONE(bp); + bp->b_flags |= XBF_WRITE | XBF_ASYNC | XBF_DONE; + xfs_bdstrat_cb(bp); + } else { + xfs_buf_relse(bp); } - ASSERT(bp->b_iodone != NULL); - trace_xfs_buf_item_iodone_async(bp, _RET_IP_); - xfs_buf_relse(bp); + return; } |