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Diffstat (limited to 'fs/xfs/xfs_buf_item.c')
-rw-r--r--fs/xfs/xfs_buf_item.c96
1 files changed, 26 insertions, 70 deletions
diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c
index 3a0bc38f1859..fb20f384b566 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;
}