Merge tag 'v3.13-rc6' into for-3.14/core

Needed to bring blk-mq uptodate, since changes have been going in
since for-3.14/core was established.

Fixup merge issues related to the immutable biovec changes.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

Conflicts:
	block/blk-flush.c
	fs/btrfs/check-integrity.c
	fs/btrfs/extent_io.c
	fs/btrfs/scrub.c
	fs/logfs/dev_bdev.c

1 files changed, 14 insertions, 23 deletions

diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 5f3ea443ebbe..2a941ab623cb 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -698,7 +698,11 @@ xfs_buf_read_uncached(
         bp->b_flags |= XBF_READ;
         bp->b_ops = ops;
 
-        xfsbdstrat(target->bt_mount, bp);
+        if (XFS_FORCED_SHUTDOWN(target->bt_mount)) {
+                xfs_buf_relse(bp);
+                return NULL;
+        }
+        xfs_buf_iorequest(bp);
         xfs_buf_iowait(bp);
         return bp;
 }
@@ -1089,7 +1093,7 @@ xfs_bioerror(
  * This is meant for userdata errors; metadata bufs come with
  * iodone functions attached, so that we can track down errors.
  */
-STATIC int
+int
 xfs_bioerror_relse(
         struct xfs_buf  *bp)
 {
@@ -1152,7 +1156,7 @@ xfs_bwrite(
         ASSERT(xfs_buf_islocked(bp));
 
         bp->b_flags |= XBF_WRITE;
-        bp->b_flags &= ~(XBF_ASYNC | XBF_READ | _XBF_DELWRI_Q);
+        bp->b_flags &= ~(XBF_ASYNC | XBF_READ | _XBF_DELWRI_Q | XBF_WRITE_FAIL);
 
         xfs_bdstrat_cb(bp);
 
@@ -1164,25 +1168,6 @@ xfs_bwrite(
         return error;
 }
 
-/*
- * Wrapper around bdstrat so that we can stop data from going to disk in case
- * we are shutting down the filesystem.  Typically user data goes thru this
- * path; one of the exceptions is the superblock.
- */
-void
-xfsbdstrat(
-        struct xfs_mount        *mp,
-        struct xfs_buf          *bp)
-{
-        if (XFS_FORCED_SHUTDOWN(mp)) {
-                trace_xfs_bdstrat_shut(bp, _RET_IP_);
-                xfs_bioerror_relse(bp);
-                return;
-        }
-
-        xfs_buf_iorequest(bp);
-}
-
 STATIC void
 _xfs_buf_ioend(
         xfs_buf_t               *bp,
@@ -1516,6 +1501,12 @@ xfs_wait_buftarg(
                         struct xfs_buf *bp;
                         bp = list_first_entry(&dispose, struct xfs_buf, b_lru);
                         list_del_init(&bp->b_lru);
+                        if (bp->b_flags & XBF_WRITE_FAIL) {
+                                xfs_alert(btp->bt_mount,
+"Corruption Alert: Buffer at block 0x%llx had permanent write failures!\n"
+"Please run xfs_repair to determine the extent of the problem.",
+                                        (long long)bp->b_bn);
+                        }
                         xfs_buf_rele(bp);
                 }
                 if (loop++ != 0)
@@ -1799,7 +1790,7 @@ __xfs_buf_delwri_submit(
 
         blk_start_plug(&plug);
         list_for_each_entry_safe(bp, n, io_list, b_list) {
-                bp->b_flags &= ~(_XBF_DELWRI_Q | XBF_ASYNC);
+                bp->b_flags &= ~(_XBF_DELWRI_Q | XBF_ASYNC | XBF_WRITE_FAIL);
                 bp->b_flags |= XBF_WRITE;
 
                 if (!wait) {