diff --git a/MAINTAINERS b/MAINTAINERS
index b2cf5cf..e75188f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9715,7 +9715,6 @@
 XFS FILESYSTEM
 P:	Silicon Graphics Inc
 M:	Dave Chinner <david@fromorbit.com>
-M:	Ben Myers <bpm@sgi.com>
 M:	xfs@oss.sgi.com
 L:	xfs@oss.sgi.com
 W:	http://oss.sgi.com/projects/xfs
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 160a548..a701752 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -1194,13 +1194,19 @@
 	}
 
 	/*
-	 * For file extending writes updating i_size before data
-	 * writeouts complete can expose uninitialized blocks. So
-	 * even for AIO, we need to wait for i/o to complete before
-	 * returning in this case.
+	 * For file extending writes updating i_size before data writeouts
+	 * complete can expose uninitialized blocks in dumb filesystems.
+	 * In that case we need to wait for I/O completion even if asked
+	 * for an asynchronous write.
 	 */
-	dio->is_async = !is_sync_kiocb(iocb) && !((rw & WRITE) &&
-		(end > i_size_read(inode)));
+	if (is_sync_kiocb(iocb))
+		dio->is_async = false;
+	else if (!(dio->flags & DIO_ASYNC_EXTEND) &&
+            (rw & WRITE) && end > i_size_read(inode))
+		dio->is_async = false;
+	else
+		dio->is_async = true;
+
 	dio->inode = inode;
 	dio->rw = rw;
 
diff --git a/fs/open.c b/fs/open.c
index 4b3e1ed..c4465b2f8 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -231,7 +231,13 @@
 		return -EINVAL;
 
 	/* Return error if mode is not supported */
-	if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
+	if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
+		     FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE))
+		return -EOPNOTSUPP;
+
+	/* Punch hole and zero range are mutually exclusive */
+	if ((mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_ZERO_RANGE)) ==
+	    (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_ZERO_RANGE))
 		return -EOPNOTSUPP;
 
 	/* Punch hole must have keep size set */
@@ -239,11 +245,20 @@
 	    !(mode & FALLOC_FL_KEEP_SIZE))
 		return -EOPNOTSUPP;
 
+	/* Collapse range should only be used exclusively. */
+	if ((mode & FALLOC_FL_COLLAPSE_RANGE) &&
+	    (mode & ~FALLOC_FL_COLLAPSE_RANGE))
+		return -EINVAL;
+
 	if (!(file->f_mode & FMODE_WRITE))
 		return -EBADF;
 
-	/* It's not possible punch hole on append only file */
-	if (mode & FALLOC_FL_PUNCH_HOLE && IS_APPEND(inode))
+	/*
+	 * It's not possible to punch hole or perform collapse range
+	 * on append only file
+	 */
+	if (mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE)
+	    && IS_APPEND(inode))
 		return -EPERM;
 
 	if (IS_IMMUTABLE(inode))
@@ -271,6 +286,14 @@
 	if (((offset + len) > inode->i_sb->s_maxbytes) || ((offset + len) < 0))
 		return -EFBIG;
 
+	/*
+	 * There is no need to overlap collapse range with EOF, in which case
+	 * it is effectively a truncate operation
+	 */
+	if ((mode & FALLOC_FL_COLLAPSE_RANGE) &&
+	    (offset + len >= i_size_read(inode)))
+		return -EINVAL;
+
 	if (!file->f_op->fallocate)
 		return -EOPNOTSUPP;
 
diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c
index 0ecec18..6888ad8 100644
--- a/fs/xfs/xfs_acl.c
+++ b/fs/xfs/xfs_acl.c
@@ -281,7 +281,7 @@
 	if (!acl)
 		goto set_acl;
 
-	error = -EINVAL;
+	error = -E2BIG;
 	if (acl->a_count > XFS_ACL_MAX_ENTRIES(XFS_M(inode->i_sb)))
 		return error;
 
diff --git a/fs/xfs/xfs_ag.h b/fs/xfs/xfs_ag.h
index 3fc1098..0fdd410 100644
--- a/fs/xfs/xfs_ag.h
+++ b/fs/xfs/xfs_ag.h
@@ -89,6 +89,8 @@
 	/* structure must be padded to 64 bit alignment */
 } xfs_agf_t;
 
+#define XFS_AGF_CRC_OFF		offsetof(struct xfs_agf, agf_crc)
+
 #define	XFS_AGF_MAGICNUM	0x00000001
 #define	XFS_AGF_VERSIONNUM	0x00000002
 #define	XFS_AGF_SEQNO		0x00000004
@@ -167,6 +169,8 @@
 	/* structure must be padded to 64 bit alignment */
 } xfs_agi_t;
 
+#define XFS_AGI_CRC_OFF		offsetof(struct xfs_agi, agi_crc)
+
 #define	XFS_AGI_MAGICNUM	0x00000001
 #define	XFS_AGI_VERSIONNUM	0x00000002
 #define	XFS_AGI_SEQNO		0x00000004
@@ -222,6 +226,8 @@
 	__be32		agfl_bno[];	/* actually XFS_AGFL_SIZE(mp) */
 } xfs_agfl_t;
 
+#define XFS_AGFL_CRC_OFF	offsetof(struct xfs_agfl, agfl_crc)
+
 /*
  * tags for inode radix tree
  */
diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c
index 9eab2df..c1cf6a3 100644
--- a/fs/xfs/xfs_alloc.c
+++ b/fs/xfs/xfs_alloc.c
@@ -474,7 +474,6 @@
 	struct xfs_buf	*bp)
 {
 	struct xfs_mount *mp = bp->b_target->bt_mount;
-	int		agfl_ok = 1;
 
 	/*
 	 * There is no verification of non-crc AGFLs because mkfs does not
@@ -485,15 +484,13 @@
 	if (!xfs_sb_version_hascrc(&mp->m_sb))
 		return;
 
-	agfl_ok = xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length),
-				   offsetof(struct xfs_agfl, agfl_crc));
-
-	agfl_ok = agfl_ok && xfs_agfl_verify(bp);
-
-	if (!agfl_ok) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
+	if (!xfs_buf_verify_cksum(bp, XFS_AGFL_CRC_OFF))
+		xfs_buf_ioerror(bp, EFSBADCRC);
+	else if (!xfs_agfl_verify(bp))
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
-	}
+
+	if (bp->b_error)
+		xfs_verifier_error(bp);
 }
 
 static void
@@ -508,16 +505,15 @@
 		return;
 
 	if (!xfs_agfl_verify(bp)) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_verifier_error(bp);
 		return;
 	}
 
 	if (bip)
 		XFS_BUF_TO_AGFL(bp)->agfl_lsn = cpu_to_be64(bip->bli_item.li_lsn);
 
-	xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length),
-			 offsetof(struct xfs_agfl, agfl_crc));
+	xfs_buf_update_cksum(bp, XFS_AGFL_CRC_OFF);
 }
 
 const struct xfs_buf_ops xfs_agfl_buf_ops = {
@@ -2238,19 +2234,17 @@
 	struct xfs_buf	*bp)
 {
 	struct xfs_mount *mp = bp->b_target->bt_mount;
-	int		agf_ok = 1;
 
-	if (xfs_sb_version_hascrc(&mp->m_sb))
-		agf_ok = xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length),
-					  offsetof(struct xfs_agf, agf_crc));
-
-	agf_ok = agf_ok && xfs_agf_verify(mp, bp);
-
-	if (unlikely(XFS_TEST_ERROR(!agf_ok, mp, XFS_ERRTAG_ALLOC_READ_AGF,
-			XFS_RANDOM_ALLOC_READ_AGF))) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
+	if (xfs_sb_version_hascrc(&mp->m_sb) &&
+	    !xfs_buf_verify_cksum(bp, XFS_AGF_CRC_OFF))
+		xfs_buf_ioerror(bp, EFSBADCRC);
+	else if (XFS_TEST_ERROR(!xfs_agf_verify(mp, bp), mp,
+				XFS_ERRTAG_ALLOC_READ_AGF,
+				XFS_RANDOM_ALLOC_READ_AGF))
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
-	}
+
+	if (bp->b_error)
+		xfs_verifier_error(bp);
 }
 
 static void
@@ -2261,8 +2255,8 @@
 	struct xfs_buf_log_item	*bip = bp->b_fspriv;
 
 	if (!xfs_agf_verify(mp, bp)) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_verifier_error(bp);
 		return;
 	}
 
@@ -2272,8 +2266,7 @@
 	if (bip)
 		XFS_BUF_TO_AGF(bp)->agf_lsn = cpu_to_be64(bip->bli_item.li_lsn);
 
-	xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length),
-			 offsetof(struct xfs_agf, agf_crc));
+	xfs_buf_update_cksum(bp, XFS_AGF_CRC_OFF);
 }
 
 const struct xfs_buf_ops xfs_agf_buf_ops = {
diff --git a/fs/xfs/xfs_alloc_btree.c b/fs/xfs/xfs_alloc_btree.c
index 1308542..cc1eadc 100644
--- a/fs/xfs/xfs_alloc_btree.c
+++ b/fs/xfs/xfs_alloc_btree.c
@@ -355,12 +355,14 @@
 xfs_allocbt_read_verify(
 	struct xfs_buf	*bp)
 {
-	if (!(xfs_btree_sblock_verify_crc(bp) &&
-	      xfs_allocbt_verify(bp))) {
-		trace_xfs_btree_corrupt(bp, _RET_IP_);
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW,
-				     bp->b_target->bt_mount, bp->b_addr);
+	if (!xfs_btree_sblock_verify_crc(bp))
+		xfs_buf_ioerror(bp, EFSBADCRC);
+	else if (!xfs_allocbt_verify(bp))
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
+
+	if (bp->b_error) {
+		trace_xfs_btree_corrupt(bp, _RET_IP_);
+		xfs_verifier_error(bp);
 	}
 }
 
@@ -370,9 +372,9 @@
 {
 	if (!xfs_allocbt_verify(bp)) {
 		trace_xfs_btree_corrupt(bp, _RET_IP_);
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW,
-				     bp->b_target->bt_mount, bp->b_addr);
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_verifier_error(bp);
+		return;
 	}
 	xfs_btree_sblock_calc_crc(bp);
 
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index dba4885..75df77d 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -1460,7 +1460,8 @@
 		ret = __blockdev_direct_IO(rw, iocb, inode, bdev, iov,
 					    offset, nr_segs,
 					    xfs_get_blocks_direct,
-					    xfs_end_io_direct_write, NULL, 0);
+					    xfs_end_io_direct_write, NULL,
+					    DIO_ASYNC_EXTEND);
 		if (ret != -EIOCBQUEUED && iocb->private)
 			goto out_destroy_ioend;
 	} else {
diff --git a/fs/xfs/xfs_attr_leaf.c b/fs/xfs/xfs_attr_leaf.c
index 7b126f4..fe9587f 100644
--- a/fs/xfs/xfs_attr_leaf.c
+++ b/fs/xfs/xfs_attr_leaf.c
@@ -213,8 +213,8 @@
 	struct xfs_attr3_leaf_hdr *hdr3 = bp->b_addr;
 
 	if (!xfs_attr3_leaf_verify(bp)) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_verifier_error(bp);
 		return;
 	}
 
@@ -224,7 +224,7 @@
 	if (bip)
 		hdr3->info.lsn = cpu_to_be64(bip->bli_item.li_lsn);
 
-	xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length), XFS_ATTR3_LEAF_CRC_OFF);
+	xfs_buf_update_cksum(bp, XFS_ATTR3_LEAF_CRC_OFF);
 }
 
 /*
@@ -239,13 +239,14 @@
 {
 	struct xfs_mount	*mp = bp->b_target->bt_mount;
 
-	if ((xfs_sb_version_hascrc(&mp->m_sb) &&
-	     !xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length),
-					  XFS_ATTR3_LEAF_CRC_OFF)) ||
-	    !xfs_attr3_leaf_verify(bp)) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
+	if (xfs_sb_version_hascrc(&mp->m_sb) &&
+	     !xfs_buf_verify_cksum(bp, XFS_ATTR3_LEAF_CRC_OFF))
+		xfs_buf_ioerror(bp, EFSBADCRC);
+	else if (!xfs_attr3_leaf_verify(bp))
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
-	}
+
+	if (bp->b_error)
+		xfs_verifier_error(bp);
 }
 
 const struct xfs_buf_ops xfs_attr3_leaf_buf_ops = {
diff --git a/fs/xfs/xfs_attr_remote.c b/fs/xfs/xfs_attr_remote.c
index 5549d69..6e37823 100644
--- a/fs/xfs/xfs_attr_remote.c
+++ b/fs/xfs/xfs_attr_remote.c
@@ -125,7 +125,6 @@
 	struct xfs_mount *mp = bp->b_target->bt_mount;
 	char		*ptr;
 	int		len;
-	bool		corrupt = false;
 	xfs_daddr_t	bno;
 
 	/* no verification of non-crc buffers */
@@ -140,11 +139,11 @@
 	while (len > 0) {
 		if (!xfs_verify_cksum(ptr, XFS_LBSIZE(mp),
 				      XFS_ATTR3_RMT_CRC_OFF)) {
-			corrupt = true;
+			xfs_buf_ioerror(bp, EFSBADCRC);
 			break;
 		}
 		if (!xfs_attr3_rmt_verify(mp, ptr, XFS_LBSIZE(mp), bno)) {
-			corrupt = true;
+			xfs_buf_ioerror(bp, EFSCORRUPTED);
 			break;
 		}
 		len -= XFS_LBSIZE(mp);
@@ -152,10 +151,9 @@
 		bno += mp->m_bsize;
 	}
 
-	if (corrupt) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
-	} else
+	if (bp->b_error)
+		xfs_verifier_error(bp);
+	else
 		ASSERT(len == 0);
 }
 
@@ -180,9 +178,8 @@
 
 	while (len > 0) {
 		if (!xfs_attr3_rmt_verify(mp, ptr, XFS_LBSIZE(mp), bno)) {
-			XFS_CORRUPTION_ERROR(__func__,
-					    XFS_ERRLEVEL_LOW, mp, bp->b_addr);
 			xfs_buf_ioerror(bp, EFSCORRUPTED);
+			xfs_verifier_error(bp);
 			return;
 		}
 		if (bip) {
diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index 152543c..5b6092e 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -5378,3 +5378,196 @@
 	}
 	return error;
 }
+
+/*
+ * Shift extent records to the left to cover a hole.
+ *
+ * The maximum number of extents to be shifted in a single operation
+ * is @num_exts, and @current_ext keeps track of the current extent
+ * index we have shifted. @offset_shift_fsb is the length by which each
+ * extent is shifted. If there is no hole to shift the extents
+ * into, this will be considered invalid operation and we abort immediately.
+ */
+int
+xfs_bmap_shift_extents(
+	struct xfs_trans	*tp,
+	struct xfs_inode	*ip,
+	int			*done,
+	xfs_fileoff_t		start_fsb,
+	xfs_fileoff_t		offset_shift_fsb,
+	xfs_extnum_t		*current_ext,
+	xfs_fsblock_t		*firstblock,
+	struct xfs_bmap_free	*flist,
+	int			num_exts)
+{
+	struct xfs_btree_cur		*cur;
+	struct xfs_bmbt_rec_host	*gotp;
+	struct xfs_bmbt_irec            got;
+	struct xfs_bmbt_irec		left;
+	struct xfs_mount		*mp = ip->i_mount;
+	struct xfs_ifork		*ifp;
+	xfs_extnum_t			nexts = 0;
+	xfs_fileoff_t			startoff;
+	int				error = 0;
+	int				i;
+	int				whichfork = XFS_DATA_FORK;
+	int				logflags;
+	xfs_filblks_t			blockcount = 0;
+
+	if (unlikely(XFS_TEST_ERROR(
+	    (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
+	     XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE),
+	     mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) {
+		XFS_ERROR_REPORT("xfs_bmap_shift_extents",
+				 XFS_ERRLEVEL_LOW, mp);
+		return XFS_ERROR(EFSCORRUPTED);
+	}
+
+	if (XFS_FORCED_SHUTDOWN(mp))
+		return XFS_ERROR(EIO);
+
+	ASSERT(current_ext != NULL);
+
+	ifp = XFS_IFORK_PTR(ip, whichfork);
+
+	if (!(ifp->if_flags & XFS_IFEXTENTS)) {
+		/* Read in all the extents */
+		error = xfs_iread_extents(tp, ip, whichfork);
+		if (error)
+			return error;
+	}
+
+	/*
+	 * If *current_ext is 0, we would need to lookup the extent
+	 * from where we would start shifting and store it in gotp.
+	 */
+	if (!*current_ext) {
+		gotp = xfs_iext_bno_to_ext(ifp, start_fsb, current_ext);
+		/*
+		 * gotp can be null in 2 cases: 1) if there are no extents
+		 * or 2) start_fsb lies in a hole beyond which there are
+		 * no extents. Either way, we are done.
+		 */
+		if (!gotp) {
+			*done = 1;
+			return 0;
+		}
+	}
+
+	/* We are going to change core inode */
+	logflags = XFS_ILOG_CORE;
+
+	if (ifp->if_flags & XFS_IFBROOT) {
+		cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork);
+		cur->bc_private.b.firstblock = *firstblock;
+		cur->bc_private.b.flist = flist;
+		cur->bc_private.b.flags = 0;
+	} else {
+		cur = NULL;
+		logflags |= XFS_ILOG_DEXT;
+	}
+
+	while (nexts++ < num_exts &&
+	       *current_ext <  XFS_IFORK_NEXTENTS(ip, whichfork)) {
+
+		gotp = xfs_iext_get_ext(ifp, *current_ext);
+		xfs_bmbt_get_all(gotp, &got);
+		startoff = got.br_startoff - offset_shift_fsb;
+
+		/*
+		 * Before shifting extent into hole, make sure that the hole
+		 * is large enough to accomodate the shift.
+		 */
+		if (*current_ext) {
+			xfs_bmbt_get_all(xfs_iext_get_ext(ifp,
+						*current_ext - 1), &left);
+
+			if (startoff < left.br_startoff + left.br_blockcount)
+				error = XFS_ERROR(EINVAL);
+		} else if (offset_shift_fsb > got.br_startoff) {
+			/*
+			 * When first extent is shifted, offset_shift_fsb
+			 * should be less than the stating offset of
+			 * the first extent.
+			 */
+			error = XFS_ERROR(EINVAL);
+		}
+
+		if (error)
+			goto del_cursor;
+
+		if (cur) {
+			error = xfs_bmbt_lookup_eq(cur, got.br_startoff,
+						   got.br_startblock,
+						   got.br_blockcount,
+						   &i);
+			if (error)
+				goto del_cursor;
+			XFS_WANT_CORRUPTED_GOTO(i == 1, del_cursor);
+		}
+
+		/* Check if we can merge 2 adjacent extents */
+		if (*current_ext &&
+		    left.br_startoff + left.br_blockcount == startoff &&
+		    left.br_startblock + left.br_blockcount ==
+				got.br_startblock &&
+		    left.br_state == got.br_state &&
+		    left.br_blockcount + got.br_blockcount <= MAXEXTLEN) {
+			blockcount = left.br_blockcount +
+				got.br_blockcount;
+			xfs_iext_remove(ip, *current_ext, 1, 0);
+			if (cur) {
+				error = xfs_btree_delete(cur, &i);
+				if (error)
+					goto del_cursor;
+				XFS_WANT_CORRUPTED_GOTO(i == 1, del_cursor);
+			}
+			XFS_IFORK_NEXT_SET(ip, whichfork,
+				XFS_IFORK_NEXTENTS(ip, whichfork) - 1);
+			gotp = xfs_iext_get_ext(ifp, --*current_ext);
+			xfs_bmbt_get_all(gotp, &got);
+
+			/* Make cursor point to the extent we will update */
+			if (cur) {
+				error = xfs_bmbt_lookup_eq(cur, got.br_startoff,
+							   got.br_startblock,
+							   got.br_blockcount,
+							   &i);
+				if (error)
+					goto del_cursor;
+				XFS_WANT_CORRUPTED_GOTO(i == 1, del_cursor);
+			}
+
+			xfs_bmbt_set_blockcount(gotp, blockcount);
+			got.br_blockcount = blockcount;
+		} else {
+			/* We have to update the startoff */
+			xfs_bmbt_set_startoff(gotp, startoff);
+			got.br_startoff = startoff;
+		}
+
+		if (cur) {
+			error = xfs_bmbt_update(cur, got.br_startoff,
+						got.br_startblock,
+						got.br_blockcount,
+						got.br_state);
+			if (error)
+				goto del_cursor;
+		}
+
+		(*current_ext)++;
+	}
+
+	/* Check if we are done */
+	if (*current_ext ==  XFS_IFORK_NEXTENTS(ip, whichfork))
+		*done = 1;
+
+del_cursor:
+	if (cur)
+		xfs_btree_del_cursor(cur,
+			error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
+
+	xfs_trans_log_inode(tp, ip, logflags);
+
+	return error;
+}
diff --git a/fs/xfs/xfs_bmap.h b/fs/xfs/xfs_bmap.h
index 33b41f3..f84bd7a 100644
--- a/fs/xfs/xfs_bmap.h
+++ b/fs/xfs/xfs_bmap.h
@@ -127,6 +127,16 @@
 	{ BMAP_RIGHT_FILLING,	"RF" }, \
 	{ BMAP_ATTRFORK,	"ATTR" }
 
+
+/*
+ * This macro is used to determine how many extents will be shifted
+ * in one write transaction. We could require two splits,
+ * an extent move on the first and an extent merge on the second,
+ * So it is proper that one extent is shifted inside write transaction
+ * at a time.
+ */
+#define XFS_BMAP_MAX_SHIFT_EXTENTS	1
+
 #ifdef DEBUG
 void	xfs_bmap_trace_exlist(struct xfs_inode *ip, xfs_extnum_t cnt,
 		int whichfork, unsigned long caller_ip);
@@ -169,5 +179,10 @@
 int	xfs_check_nostate_extents(struct xfs_ifork *ifp, xfs_extnum_t idx,
 		xfs_extnum_t num);
 uint	xfs_default_attroffset(struct xfs_inode *ip);
+int	xfs_bmap_shift_extents(struct xfs_trans *tp, struct xfs_inode *ip,
+		int *done, xfs_fileoff_t start_fsb,
+		xfs_fileoff_t offset_shift_fsb, xfs_extnum_t *current_ext,
+		xfs_fsblock_t *firstblock, struct xfs_bmap_free	*flist,
+		int num_exts);
 
 #endif	/* __XFS_BMAP_H__ */
diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/xfs_bmap_btree.c
index 706bc3f..818d546 100644
--- a/fs/xfs/xfs_bmap_btree.c
+++ b/fs/xfs/xfs_bmap_btree.c
@@ -780,12 +780,14 @@
 xfs_bmbt_read_verify(
 	struct xfs_buf	*bp)
 {
-	if (!(xfs_btree_lblock_verify_crc(bp) &&
-	      xfs_bmbt_verify(bp))) {
-		trace_xfs_btree_corrupt(bp, _RET_IP_);
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW,
-				     bp->b_target->bt_mount, bp->b_addr);
+	if (!xfs_btree_lblock_verify_crc(bp))
+		xfs_buf_ioerror(bp, EFSBADCRC);
+	else if (!xfs_bmbt_verify(bp))
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
+
+	if (bp->b_error) {
+		trace_xfs_btree_corrupt(bp, _RET_IP_);
+		xfs_verifier_error(bp);
 	}
 }
 
@@ -794,11 +796,9 @@
 	struct xfs_buf	*bp)
 {
 	if (!xfs_bmbt_verify(bp)) {
-		xfs_warn(bp->b_target->bt_mount, "bmbt daddr 0x%llx failed", bp->b_bn);
 		trace_xfs_btree_corrupt(bp, _RET_IP_);
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW,
-				     bp->b_target->bt_mount, bp->b_addr);
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_verifier_error(bp);
 		return;
 	}
 	xfs_btree_lblock_calc_crc(bp);
diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index f264616..01f6a64 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -1349,7 +1349,6 @@
 		 * the freeing of the space succeeds at ENOSPC.
 		 */
 		tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT);
-		tp->t_flags |= XFS_TRANS_RESERVE;
 		error = xfs_trans_reserve(tp, &M_RES(mp)->tr_write, resblks, 0);
 
 		/*
@@ -1468,6 +1467,102 @@
 }
 
 /*
+ * xfs_collapse_file_space()
+ *	This routine frees disk space and shift extent for the given file.
+ *	The first thing we do is to free data blocks in the specified range
+ *	by calling xfs_free_file_space(). It would also sync dirty data
+ *	and invalidate page cache over the region on which collapse range
+ *	is working. And Shift extent records to the left to cover a hole.
+ * RETURNS:
+ *	0 on success
+ *	errno on error
+ *
+ */
+int
+xfs_collapse_file_space(
+	struct xfs_inode	*ip,
+	xfs_off_t		offset,
+	xfs_off_t		len)
+{
+	int			done = 0;
+	struct xfs_mount	*mp = ip->i_mount;
+	struct xfs_trans	*tp;
+	int			error;
+	xfs_extnum_t		current_ext = 0;
+	struct xfs_bmap_free	free_list;
+	xfs_fsblock_t		first_block;
+	int			committed;
+	xfs_fileoff_t		start_fsb;
+	xfs_fileoff_t		shift_fsb;
+
+	ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
+
+	trace_xfs_collapse_file_space(ip);
+
+	start_fsb = XFS_B_TO_FSB(mp, offset + len);
+	shift_fsb = XFS_B_TO_FSB(mp, len);
+
+	error = xfs_free_file_space(ip, offset, len);
+	if (error)
+		return error;
+
+	while (!error && !done) {
+		tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT);
+		tp->t_flags |= XFS_TRANS_RESERVE;
+		/*
+		 * We would need to reserve permanent block for transaction.
+		 * This will come into picture when after shifting extent into
+		 * hole we found that adjacent extents can be merged which
+		 * may lead to freeing of a block during record update.
+		 */
+		error = xfs_trans_reserve(tp, &M_RES(mp)->tr_write,
+				XFS_DIOSTRAT_SPACE_RES(mp, 0), 0);
+		if (error) {
+			ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp));
+			xfs_trans_cancel(tp, 0);
+			break;
+		}
+
+		xfs_ilock(ip, XFS_ILOCK_EXCL);
+		error = xfs_trans_reserve_quota(tp, mp, ip->i_udquot,
+				ip->i_gdquot, ip->i_pdquot,
+				XFS_DIOSTRAT_SPACE_RES(mp, 0), 0,
+				XFS_QMOPT_RES_REGBLKS);
+		if (error)
+			goto out;
+
+		xfs_trans_ijoin(tp, ip, 0);
+
+		xfs_bmap_init(&free_list, &first_block);
+
+		/*
+		 * We are using the write transaction in which max 2 bmbt
+		 * updates are allowed
+		 */
+		error = xfs_bmap_shift_extents(tp, ip, &done, start_fsb,
+					       shift_fsb, &current_ext,
+					       &first_block, &free_list,
+					       XFS_BMAP_MAX_SHIFT_EXTENTS);
+		if (error)
+			goto out;
+
+		error = xfs_bmap_finish(&tp, &free_list, &committed);
+		if (error)
+			goto out;
+
+		error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
+		xfs_iunlock(ip, XFS_ILOCK_EXCL);
+	}
+
+	return error;
+
+out:
+	xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
+	xfs_iunlock(ip, XFS_ILOCK_EXCL);
+	return error;
+}
+
+/*
  * We need to check that the format of the data fork in the temporary inode is
  * valid for the target inode before doing the swap. This is not a problem with
  * attr1 because of the fixed fork offset, but attr2 has a dynamically sized
diff --git a/fs/xfs/xfs_bmap_util.h b/fs/xfs/xfs_bmap_util.h
index 900747b..935ed2b2 100644
--- a/fs/xfs/xfs_bmap_util.h
+++ b/fs/xfs/xfs_bmap_util.h
@@ -99,6 +99,8 @@
 			    xfs_off_t len);
 int	xfs_zero_file_space(struct xfs_inode *ip, xfs_off_t offset,
 			    xfs_off_t len);
+int	xfs_collapse_file_space(struct xfs_inode *, xfs_off_t offset,
+				xfs_off_t len);
 
 /* EOF block manipulation functions */
 bool	xfs_can_free_eofblocks(struct xfs_inode *ip, bool force);
diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c
index 9adaae4..e80d59f 100644
--- a/fs/xfs/xfs_btree.c
+++ b/fs/xfs/xfs_btree.c
@@ -234,8 +234,7 @@
 		return;
 	if (bip)
 		block->bb_u.l.bb_lsn = cpu_to_be64(bip->bli_item.li_lsn);
-	xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length),
-			 XFS_BTREE_LBLOCK_CRC_OFF);
+	xfs_buf_update_cksum(bp, XFS_BTREE_LBLOCK_CRC_OFF);
 }
 
 bool
@@ -243,8 +242,8 @@
 	struct xfs_buf		*bp)
 {
 	if (xfs_sb_version_hascrc(&bp->b_target->bt_mount->m_sb))
-		return xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length),
-					XFS_BTREE_LBLOCK_CRC_OFF);
+		return xfs_buf_verify_cksum(bp, XFS_BTREE_LBLOCK_CRC_OFF);
+
 	return true;
 }
 
@@ -267,8 +266,7 @@
 		return;
 	if (bip)
 		block->bb_u.s.bb_lsn = cpu_to_be64(bip->bli_item.li_lsn);
-	xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length),
-			 XFS_BTREE_SBLOCK_CRC_OFF);
+	xfs_buf_update_cksum(bp, XFS_BTREE_SBLOCK_CRC_OFF);
 }
 
 bool
@@ -276,8 +274,8 @@
 	struct xfs_buf		*bp)
 {
 	if (xfs_sb_version_hascrc(&bp->b_target->bt_mount->m_sb))
-		return xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length),
-					XFS_BTREE_SBLOCK_CRC_OFF);
+		return xfs_buf_verify_cksum(bp, XFS_BTREE_SBLOCK_CRC_OFF);
+
 	return true;
 }
 
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index 9953395..b8a3abf 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -369,6 +369,20 @@
 	xfs_buf_rele(bp);
 }
 
+static inline int
+xfs_buf_verify_cksum(struct xfs_buf *bp, unsigned long cksum_offset)
+{
+	return xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length),
+				cksum_offset);
+}
+
+static inline void
+xfs_buf_update_cksum(struct xfs_buf *bp, unsigned long cksum_offset)
+{
+	xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length),
+			 cksum_offset);
+}
+
 /*
  *	Handling of buftargs.
  */
diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c
index 3314911..8752821 100644
--- a/fs/xfs/xfs_buf_item.c
+++ b/fs/xfs/xfs_buf_item.c
@@ -796,20 +796,6 @@
 		bip->bli_formats[i].blf_map_size = map_size;
 	}
 
-#ifdef XFS_TRANS_DEBUG
-	/*
-	 * Allocate the arrays for tracking what needs to be logged
-	 * and what our callers request to be logged.  bli_orig
-	 * holds a copy of the original, clean buffer for comparison
-	 * against, and bli_logged keeps a 1 bit flag per byte in
-	 * the buffer to indicate which bytes the callers have asked
-	 * to have logged.
-	 */
-	bip->bli_orig = kmem_alloc(BBTOB(bp->b_length), KM_SLEEP);
-	memcpy(bip->bli_orig, bp->b_addr, BBTOB(bp->b_length));
-	bip->bli_logged = kmem_zalloc(BBTOB(bp->b_length) / NBBY, KM_SLEEP);
-#endif
-
 	/*
 	 * Put the buf item into the list of items attached to the
 	 * buffer at the front.
@@ -957,11 +943,6 @@
 xfs_buf_item_free(
 	xfs_buf_log_item_t	*bip)
 {
-#ifdef XFS_TRANS_DEBUG
-	kmem_free(bip->bli_orig);
-	kmem_free(bip->bli_logged);
-#endif /* XFS_TRANS_DEBUG */
-
 	xfs_buf_item_free_format(bip);
 	kmem_zone_free(xfs_buf_item_zone, bip);
 }
diff --git a/fs/xfs/xfs_da_btree.c b/fs/xfs/xfs_da_btree.c
index e69d57b..6cc5f67 100644
--- a/fs/xfs/xfs_da_btree.c
+++ b/fs/xfs/xfs_da_btree.c
@@ -185,8 +185,8 @@
 	struct xfs_da3_node_hdr *hdr3 = bp->b_addr;
 
 	if (!xfs_da3_node_verify(bp)) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_verifier_error(bp);
 		return;
 	}
 
@@ -196,7 +196,7 @@
 	if (bip)
 		hdr3->info.lsn = cpu_to_be64(bip->bli_item.li_lsn);
 
-	xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length), XFS_DA3_NODE_CRC_OFF);
+	xfs_buf_update_cksum(bp, XFS_DA3_NODE_CRC_OFF);
 }
 
 /*
@@ -209,18 +209,20 @@
 xfs_da3_node_read_verify(
 	struct xfs_buf		*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
 	struct xfs_da_blkinfo	*info = bp->b_addr;
 
 	switch (be16_to_cpu(info->magic)) {
 		case XFS_DA3_NODE_MAGIC:
-			if (!xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length),
-					      XFS_DA3_NODE_CRC_OFF))
+			if (!xfs_buf_verify_cksum(bp, XFS_DA3_NODE_CRC_OFF)) {
+				xfs_buf_ioerror(bp, EFSBADCRC);
 				break;
+			}
 			/* fall through */
 		case XFS_DA_NODE_MAGIC:
-			if (!xfs_da3_node_verify(bp))
+			if (!xfs_da3_node_verify(bp)) {
+				xfs_buf_ioerror(bp, EFSCORRUPTED);
 				break;
+			}
 			return;
 		case XFS_ATTR_LEAF_MAGIC:
 		case XFS_ATTR3_LEAF_MAGIC:
@@ -237,8 +239,7 @@
 	}
 
 	/* corrupt block */
-	XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
-	xfs_buf_ioerror(bp, EFSCORRUPTED);
+	xfs_verifier_error(bp);
 }
 
 const struct xfs_buf_ops xfs_da3_node_buf_ops = {
diff --git a/fs/xfs/xfs_dinode.h b/fs/xfs/xfs_dinode.h
index e5869b5..623bbe8 100644
--- a/fs/xfs/xfs_dinode.h
+++ b/fs/xfs/xfs_dinode.h
@@ -89,6 +89,8 @@
 	/* structure must be padded to 64 bit alignment */
 } xfs_dinode_t;
 
+#define XFS_DINODE_CRC_OFF	offsetof(struct xfs_dinode, di_crc)
+
 #define DI_MAX_FLUSH 0xffff
 
 /*
diff --git a/fs/xfs/xfs_dir2.c b/fs/xfs/xfs_dir2.c
index ce16ef0..fda4625 100644
--- a/fs/xfs/xfs_dir2.c
+++ b/fs/xfs/xfs_dir2.c
@@ -180,16 +180,23 @@
 	xfs_inode_t	*dp,
 	xfs_inode_t	*pdp)
 {
-	xfs_da_args_t	args;
+	struct xfs_da_args *args;
 	int		error;
 
-	memset((char *)&args, 0, sizeof(args));
-	args.dp = dp;
-	args.trans = tp;
 	ASSERT(S_ISDIR(dp->i_d.di_mode));
-	if ((error = xfs_dir_ino_validate(tp->t_mountp, pdp->i_ino)))
+	error = xfs_dir_ino_validate(tp->t_mountp, pdp->i_ino);
+	if (error)
 		return error;
-	return xfs_dir2_sf_create(&args, pdp->i_ino);
+
+	args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
+	if (!args)
+		return ENOMEM;
+
+	args->dp = dp;
+	args->trans = tp;
+	error = xfs_dir2_sf_create(args, pdp->i_ino);
+	kmem_free(args);
+	return error;
 }
 
 /*
@@ -205,41 +212,56 @@
 	xfs_bmap_free_t		*flist,		/* bmap's freeblock list */
 	xfs_extlen_t		total)		/* bmap's total block count */
 {
-	xfs_da_args_t		args;
+	struct xfs_da_args	*args;
 	int			rval;
 	int			v;		/* type-checking value */
 
 	ASSERT(S_ISDIR(dp->i_d.di_mode));
-	if ((rval = xfs_dir_ino_validate(tp->t_mountp, inum)))
+	rval = xfs_dir_ino_validate(tp->t_mountp, inum);
+	if (rval)
 		return rval;
 	XFS_STATS_INC(xs_dir_create);
 
-	memset(&args, 0, sizeof(xfs_da_args_t));
-	args.name = name->name;
-	args.namelen = name->len;
-	args.filetype = name->type;
-	args.hashval = dp->i_mount->m_dirnameops->hashname(name);
-	args.inumber = inum;
-	args.dp = dp;
-	args.firstblock = first;
-	args.flist = flist;
-	args.total = total;
-	args.whichfork = XFS_DATA_FORK;
-	args.trans = tp;
-	args.op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT;
+	args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
+	if (!args)
+		return ENOMEM;
 
-	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
-		rval = xfs_dir2_sf_addname(&args);
-	else if ((rval = xfs_dir2_isblock(tp, dp, &v)))
-		return rval;
-	else if (v)
-		rval = xfs_dir2_block_addname(&args);
-	else if ((rval = xfs_dir2_isleaf(tp, dp, &v)))
-		return rval;
-	else if (v)
-		rval = xfs_dir2_leaf_addname(&args);
+	args->name = name->name;
+	args->namelen = name->len;
+	args->filetype = name->type;
+	args->hashval = dp->i_mount->m_dirnameops->hashname(name);
+	args->inumber = inum;
+	args->dp = dp;
+	args->firstblock = first;
+	args->flist = flist;
+	args->total = total;
+	args->whichfork = XFS_DATA_FORK;
+	args->trans = tp;
+	args->op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT;
+
+	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
+		rval = xfs_dir2_sf_addname(args);
+		goto out_free;
+	}
+
+	rval = xfs_dir2_isblock(tp, dp, &v);
+	if (rval)
+		goto out_free;
+	if (v) {
+		rval = xfs_dir2_block_addname(args);
+		goto out_free;
+	}
+
+	rval = xfs_dir2_isleaf(tp, dp, &v);
+	if (rval)
+		goto out_free;
+	if (v)
+		rval = xfs_dir2_leaf_addname(args);
 	else
-		rval = xfs_dir2_node_addname(&args);
+		rval = xfs_dir2_node_addname(args);
+
+out_free:
+	kmem_free(args);
 	return rval;
 }
 
@@ -282,46 +304,66 @@
 	xfs_ino_t	*inum,		/* out: inode number */
 	struct xfs_name *ci_name)	/* out: actual name if CI match */
 {
-	xfs_da_args_t	args;
+	struct xfs_da_args *args;
 	int		rval;
 	int		v;		/* type-checking value */
 
 	ASSERT(S_ISDIR(dp->i_d.di_mode));
 	XFS_STATS_INC(xs_dir_lookup);
 
-	memset(&args, 0, sizeof(xfs_da_args_t));
-	args.name = name->name;
-	args.namelen = name->len;
-	args.filetype = name->type;
-	args.hashval = dp->i_mount->m_dirnameops->hashname(name);
-	args.dp = dp;
-	args.whichfork = XFS_DATA_FORK;
-	args.trans = tp;
-	args.op_flags = XFS_DA_OP_OKNOENT;
+	/*
+	 * We need to use KM_NOFS here so that lockdep will not throw false
+	 * positive deadlock warnings on a non-transactional lookup path. It is
+	 * safe to recurse into inode recalim in that case, but lockdep can't
+	 * easily be taught about it. Hence KM_NOFS avoids having to add more
+	 * lockdep Doing this avoids having to add a bunch of lockdep class
+	 * annotations into the reclaim path for the ilock.
+	 */
+	args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
+	args->name = name->name;
+	args->namelen = name->len;
+	args->filetype = name->type;
+	args->hashval = dp->i_mount->m_dirnameops->hashname(name);
+	args->dp = dp;
+	args->whichfork = XFS_DATA_FORK;
+	args->trans = tp;
+	args->op_flags = XFS_DA_OP_OKNOENT;
 	if (ci_name)
-		args.op_flags |= XFS_DA_OP_CILOOKUP;
+		args->op_flags |= XFS_DA_OP_CILOOKUP;
 
-	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
-		rval = xfs_dir2_sf_lookup(&args);
-	else if ((rval = xfs_dir2_isblock(tp, dp, &v)))
-		return rval;
-	else if (v)
-		rval = xfs_dir2_block_lookup(&args);
-	else if ((rval = xfs_dir2_isleaf(tp, dp, &v)))
-		return rval;
-	else if (v)
-		rval = xfs_dir2_leaf_lookup(&args);
+	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
+		rval = xfs_dir2_sf_lookup(args);
+		goto out_check_rval;
+	}
+
+	rval = xfs_dir2_isblock(tp, dp, &v);
+	if (rval)
+		goto out_free;
+	if (v) {
+		rval = xfs_dir2_block_lookup(args);
+		goto out_check_rval;
+	}
+
+	rval = xfs_dir2_isleaf(tp, dp, &v);
+	if (rval)
+		goto out_free;
+	if (v)
+		rval = xfs_dir2_leaf_lookup(args);
 	else
-		rval = xfs_dir2_node_lookup(&args);
+		rval = xfs_dir2_node_lookup(args);
+
+out_check_rval:
 	if (rval == EEXIST)
 		rval = 0;
 	if (!rval) {
-		*inum = args.inumber;
+		*inum = args->inumber;
 		if (ci_name) {
-			ci_name->name = args.value;
-			ci_name->len = args.valuelen;
+			ci_name->name = args->value;
+			ci_name->len = args->valuelen;
 		}
 	}
+out_free:
+	kmem_free(args);
 	return rval;
 }
 
@@ -338,38 +380,51 @@
 	xfs_bmap_free_t	*flist,		/* bmap's freeblock list */
 	xfs_extlen_t	total)		/* bmap's total block count */
 {
-	xfs_da_args_t	args;
+	struct xfs_da_args *args;
 	int		rval;
 	int		v;		/* type-checking value */
 
 	ASSERT(S_ISDIR(dp->i_d.di_mode));
 	XFS_STATS_INC(xs_dir_remove);
 
-	memset(&args, 0, sizeof(xfs_da_args_t));
-	args.name = name->name;
-	args.namelen = name->len;
-	args.filetype = name->type;
-	args.hashval = dp->i_mount->m_dirnameops->hashname(name);
-	args.inumber = ino;
-	args.dp = dp;
-	args.firstblock = first;
-	args.flist = flist;
-	args.total = total;
-	args.whichfork = XFS_DATA_FORK;
-	args.trans = tp;
+	args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
+	if (!args)
+		return ENOMEM;
 
-	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
-		rval = xfs_dir2_sf_removename(&args);
-	else if ((rval = xfs_dir2_isblock(tp, dp, &v)))
-		return rval;
-	else if (v)
-		rval = xfs_dir2_block_removename(&args);
-	else if ((rval = xfs_dir2_isleaf(tp, dp, &v)))
-		return rval;
-	else if (v)
-		rval = xfs_dir2_leaf_removename(&args);
+	args->name = name->name;
+	args->namelen = name->len;
+	args->filetype = name->type;
+	args->hashval = dp->i_mount->m_dirnameops->hashname(name);
+	args->inumber = ino;
+	args->dp = dp;
+	args->firstblock = first;
+	args->flist = flist;
+	args->total = total;
+	args->whichfork = XFS_DATA_FORK;
+	args->trans = tp;
+
+	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
+		rval = xfs_dir2_sf_removename(args);
+		goto out_free;
+	}
+
+	rval = xfs_dir2_isblock(tp, dp, &v);
+	if (rval)
+		goto out_free;
+	if (v) {
+		rval = xfs_dir2_block_removename(args);
+		goto out_free;
+	}
+
+	rval = xfs_dir2_isleaf(tp, dp, &v);
+	if (rval)
+		goto out_free;
+	if (v)
+		rval = xfs_dir2_leaf_removename(args);
 	else
-		rval = xfs_dir2_node_removename(&args);
+		rval = xfs_dir2_node_removename(args);
+out_free:
+	kmem_free(args);
 	return rval;
 }
 
@@ -386,40 +441,54 @@
 	xfs_bmap_free_t	*flist,		/* bmap's freeblock list */
 	xfs_extlen_t	total)		/* bmap's total block count */
 {
-	xfs_da_args_t	args;
+	struct xfs_da_args *args;
 	int		rval;
 	int		v;		/* type-checking value */
 
 	ASSERT(S_ISDIR(dp->i_d.di_mode));
 
-	if ((rval = xfs_dir_ino_validate(tp->t_mountp, inum)))
+	rval = xfs_dir_ino_validate(tp->t_mountp, inum);
+	if (rval)
 		return rval;
 
-	memset(&args, 0, sizeof(xfs_da_args_t));
-	args.name = name->name;
-	args.namelen = name->len;
-	args.filetype = name->type;
-	args.hashval = dp->i_mount->m_dirnameops->hashname(name);
-	args.inumber = inum;
-	args.dp = dp;
-	args.firstblock = first;
-	args.flist = flist;
-	args.total = total;
-	args.whichfork = XFS_DATA_FORK;
-	args.trans = tp;
+	args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
+	if (!args)
+		return ENOMEM;
 
-	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
-		rval = xfs_dir2_sf_replace(&args);
-	else if ((rval = xfs_dir2_isblock(tp, dp, &v)))
-		return rval;
-	else if (v)
-		rval = xfs_dir2_block_replace(&args);
-	else if ((rval = xfs_dir2_isleaf(tp, dp, &v)))
-		return rval;
-	else if (v)
-		rval = xfs_dir2_leaf_replace(&args);
+	args->name = name->name;
+	args->namelen = name->len;
+	args->filetype = name->type;
+	args->hashval = dp->i_mount->m_dirnameops->hashname(name);
+	args->inumber = inum;
+	args->dp = dp;
+	args->firstblock = first;
+	args->flist = flist;
+	args->total = total;
+	args->whichfork = XFS_DATA_FORK;
+	args->trans = tp;
+
+	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
+		rval = xfs_dir2_sf_replace(args);
+		goto out_free;
+	}
+
+	rval = xfs_dir2_isblock(tp, dp, &v);
+	if (rval)
+		goto out_free;
+	if (v) {
+		rval = xfs_dir2_block_replace(args);
+		goto out_free;
+	}
+
+	rval = xfs_dir2_isleaf(tp, dp, &v);
+	if (rval)
+		goto out_free;
+	if (v)
+		rval = xfs_dir2_leaf_replace(args);
 	else
-		rval = xfs_dir2_node_replace(&args);
+		rval = xfs_dir2_node_replace(args);
+out_free:
+	kmem_free(args);
 	return rval;
 }
 
@@ -434,7 +503,7 @@
 	struct xfs_name	*name,		/* name of entry to add */
 	uint		resblks)
 {
-	xfs_da_args_t	args;
+	struct xfs_da_args *args;
 	int		rval;
 	int		v;		/* type-checking value */
 
@@ -443,29 +512,42 @@
 
 	ASSERT(S_ISDIR(dp->i_d.di_mode));
 
-	memset(&args, 0, sizeof(xfs_da_args_t));
-	args.name = name->name;
-	args.namelen = name->len;
-	args.filetype = name->type;
-	args.hashval = dp->i_mount->m_dirnameops->hashname(name);
-	args.dp = dp;
-	args.whichfork = XFS_DATA_FORK;
-	args.trans = tp;
-	args.op_flags = XFS_DA_OP_JUSTCHECK | XFS_DA_OP_ADDNAME |
+	args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
+	if (!args)
+		return ENOMEM;
+
+	args->name = name->name;
+	args->namelen = name->len;
+	args->filetype = name->type;
+	args->hashval = dp->i_mount->m_dirnameops->hashname(name);
+	args->dp = dp;
+	args->whichfork = XFS_DATA_FORK;
+	args->trans = tp;
+	args->op_flags = XFS_DA_OP_JUSTCHECK | XFS_DA_OP_ADDNAME |
 							XFS_DA_OP_OKNOENT;
 
-	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
-		rval = xfs_dir2_sf_addname(&args);
-	else if ((rval = xfs_dir2_isblock(tp, dp, &v)))
-		return rval;
-	else if (v)
-		rval = xfs_dir2_block_addname(&args);
-	else if ((rval = xfs_dir2_isleaf(tp, dp, &v)))
-		return rval;
-	else if (v)
-		rval = xfs_dir2_leaf_addname(&args);
+	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
+		rval = xfs_dir2_sf_addname(args);
+		goto out_free;
+	}
+
+	rval = xfs_dir2_isblock(tp, dp, &v);
+	if (rval)
+		goto out_free;
+	if (v) {
+		rval = xfs_dir2_block_addname(args);
+		goto out_free;
+	}
+
+	rval = xfs_dir2_isleaf(tp, dp, &v);
+	if (rval)
+		goto out_free;
+	if (v)
+		rval = xfs_dir2_leaf_addname(args);
 	else
-		rval = xfs_dir2_node_addname(&args);
+		rval = xfs_dir2_node_addname(args);
+out_free:
+	kmem_free(args);
 	return rval;
 }
 
diff --git a/fs/xfs/xfs_dir2_block.c b/fs/xfs/xfs_dir2_block.c
index 90cdbf4..4f6a38c 100644
--- a/fs/xfs/xfs_dir2_block.c
+++ b/fs/xfs/xfs_dir2_block.c
@@ -89,13 +89,14 @@
 {
 	struct xfs_mount	*mp = bp->b_target->bt_mount;
 
-	if ((xfs_sb_version_hascrc(&mp->m_sb) &&
-	     !xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length),
-					  XFS_DIR3_DATA_CRC_OFF)) ||
-	    !xfs_dir3_block_verify(bp)) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
+	if (xfs_sb_version_hascrc(&mp->m_sb) &&
+	     !xfs_buf_verify_cksum(bp, XFS_DIR3_DATA_CRC_OFF))
+		xfs_buf_ioerror(bp, EFSBADCRC);
+	else if (!xfs_dir3_block_verify(bp))
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
-	}
+
+	if (bp->b_error)
+		xfs_verifier_error(bp);
 }
 
 static void
@@ -107,8 +108,8 @@
 	struct xfs_dir3_blk_hdr	*hdr3 = bp->b_addr;
 
 	if (!xfs_dir3_block_verify(bp)) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_verifier_error(bp);
 		return;
 	}
 
@@ -118,7 +119,7 @@
 	if (bip)
 		hdr3->lsn = cpu_to_be64(bip->bli_item.li_lsn);
 
-	xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length), XFS_DIR3_DATA_CRC_OFF);
+	xfs_buf_update_cksum(bp, XFS_DIR3_DATA_CRC_OFF);
 }
 
 const struct xfs_buf_ops xfs_dir3_block_buf_ops = {
diff --git a/fs/xfs/xfs_dir2_data.c b/fs/xfs/xfs_dir2_data.c
index 70acff4..afa4ad5 100644
--- a/fs/xfs/xfs_dir2_data.c
+++ b/fs/xfs/xfs_dir2_data.c
@@ -241,7 +241,6 @@
 xfs_dir3_data_reada_verify(
 	struct xfs_buf		*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
 	struct xfs_dir2_data_hdr *hdr = bp->b_addr;
 
 	switch (hdr->magic) {
@@ -255,8 +254,8 @@
 		xfs_dir3_data_verify(bp);
 		return;
 	default:
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, hdr);
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_verifier_error(bp);
 		break;
 	}
 }
@@ -267,13 +266,14 @@
 {
 	struct xfs_mount	*mp = bp->b_target->bt_mount;
 
-	if ((xfs_sb_version_hascrc(&mp->m_sb) &&
-	     !xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length),
-					  XFS_DIR3_DATA_CRC_OFF)) ||
-	    !xfs_dir3_data_verify(bp)) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
+	if (xfs_sb_version_hascrc(&mp->m_sb) &&
+	     !xfs_buf_verify_cksum(bp, XFS_DIR3_DATA_CRC_OFF))
+		 xfs_buf_ioerror(bp, EFSBADCRC);
+	else if (!xfs_dir3_data_verify(bp))
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
-	}
+
+	if (bp->b_error)
+		xfs_verifier_error(bp);
 }
 
 static void
@@ -285,8 +285,8 @@
 	struct xfs_dir3_blk_hdr	*hdr3 = bp->b_addr;
 
 	if (!xfs_dir3_data_verify(bp)) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_verifier_error(bp);
 		return;
 	}
 
@@ -296,7 +296,7 @@
 	if (bip)
 		hdr3->lsn = cpu_to_be64(bip->bli_item.li_lsn);
 
-	xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length), XFS_DIR3_DATA_CRC_OFF);
+	xfs_buf_update_cksum(bp, XFS_DIR3_DATA_CRC_OFF);
 }
 
 const struct xfs_buf_ops xfs_dir3_data_buf_ops = {
diff --git a/fs/xfs/xfs_dir2_leaf.c b/fs/xfs/xfs_dir2_leaf.c
index ae47ec6..d36e97d 100644
--- a/fs/xfs/xfs_dir2_leaf.c
+++ b/fs/xfs/xfs_dir2_leaf.c
@@ -179,13 +179,14 @@
 {
 	struct xfs_mount	*mp = bp->b_target->bt_mount;
 
-	if ((xfs_sb_version_hascrc(&mp->m_sb) &&
-	     !xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length),
-					  XFS_DIR3_LEAF_CRC_OFF)) ||
-	    !xfs_dir3_leaf_verify(bp, magic)) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
+	if (xfs_sb_version_hascrc(&mp->m_sb) &&
+	     !xfs_buf_verify_cksum(bp, XFS_DIR3_LEAF_CRC_OFF))
+		xfs_buf_ioerror(bp, EFSBADCRC);
+	else if (!xfs_dir3_leaf_verify(bp, magic))
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
-	}
+
+	if (bp->b_error)
+		xfs_verifier_error(bp);
 }
 
 static void
@@ -198,8 +199,8 @@
 	struct xfs_dir3_leaf_hdr *hdr3 = bp->b_addr;
 
 	if (!xfs_dir3_leaf_verify(bp, magic)) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_verifier_error(bp);
 		return;
 	}
 
@@ -209,7 +210,7 @@
 	if (bip)
 		hdr3->info.lsn = cpu_to_be64(bip->bli_item.li_lsn);
 
-	xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length), XFS_DIR3_LEAF_CRC_OFF);
+	xfs_buf_update_cksum(bp, XFS_DIR3_LEAF_CRC_OFF);
 }
 
 static void
diff --git a/fs/xfs/xfs_dir2_node.c b/fs/xfs/xfs_dir2_node.c
index 48c7d18..cb434d7 100644
--- a/fs/xfs/xfs_dir2_node.c
+++ b/fs/xfs/xfs_dir2_node.c
@@ -115,13 +115,14 @@
 {
 	struct xfs_mount	*mp = bp->b_target->bt_mount;
 
-	if ((xfs_sb_version_hascrc(&mp->m_sb) &&
-	     !xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length),
-					  XFS_DIR3_FREE_CRC_OFF)) ||
-	    !xfs_dir3_free_verify(bp)) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
+	if (xfs_sb_version_hascrc(&mp->m_sb) &&
+	    !xfs_buf_verify_cksum(bp, XFS_DIR3_FREE_CRC_OFF))
+		xfs_buf_ioerror(bp, EFSBADCRC);
+	else if (!xfs_dir3_free_verify(bp))
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
-	}
+
+	if (bp->b_error)
+		xfs_verifier_error(bp);
 }
 
 static void
@@ -133,8 +134,8 @@
 	struct xfs_dir3_blk_hdr	*hdr3 = bp->b_addr;
 
 	if (!xfs_dir3_free_verify(bp)) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_verifier_error(bp);
 		return;
 	}
 
@@ -144,7 +145,7 @@
 	if (bip)
 		hdr3->lsn = cpu_to_be64(bip->bli_item.li_lsn);
 
-	xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length), XFS_DIR3_FREE_CRC_OFF);
+	xfs_buf_update_cksum(bp, XFS_DIR3_FREE_CRC_OFF);
 }
 
 const struct xfs_buf_ops xfs_dir3_free_buf_ops = {
diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
index 7aeb4c8..868b19f 100644
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -615,7 +615,7 @@
 
 	if (flags & XFS_QMOPT_DQALLOC) {
 		tp = xfs_trans_alloc(mp, XFS_TRANS_QM_DQALLOC);
-		error = xfs_trans_reserve(tp, &M_RES(mp)->tr_attrsetm,
+		error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_dqalloc,
 					  XFS_QM_DQALLOC_SPACE_RES(mp), 0);
 		if (error)
 			goto error1;
diff --git a/fs/xfs/xfs_dquot_buf.c b/fs/xfs/xfs_dquot_buf.c
index d401457..610da81 100644
--- a/fs/xfs/xfs_dquot_buf.c
+++ b/fs/xfs/xfs_dquot_buf.c
@@ -257,10 +257,13 @@
 {
 	struct xfs_mount	*mp = bp->b_target->bt_mount;
 
-	if (!xfs_dquot_buf_verify_crc(mp, bp) || !xfs_dquot_buf_verify(mp, bp)) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
+	if (!xfs_dquot_buf_verify_crc(mp, bp))
+		xfs_buf_ioerror(bp, EFSBADCRC);
+	else if (!xfs_dquot_buf_verify(mp, bp))
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
-	}
+
+	if (bp->b_error)
+		xfs_verifier_error(bp);
 }
 
 /*
@@ -275,8 +278,8 @@
 	struct xfs_mount	*mp = bp->b_target->bt_mount;
 
 	if (!xfs_dquot_buf_verify(mp, bp)) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_verifier_error(bp);
 		return;
 	}
 }
diff --git a/fs/xfs/xfs_error.c b/fs/xfs/xfs_error.c
index 9995b80..edac5b0 100644
--- a/fs/xfs/xfs_error.c
+++ b/fs/xfs/xfs_error.c
@@ -156,7 +156,7 @@
 {
 	if (level <= xfs_error_level) {
 		xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT,
-		"Internal error %s at line %d of file %s.  Caller 0x%p",
+		"Internal error %s at line %d of file %s.  Caller %pF",
 			    tag, linenum, filename, ra);
 
 		xfs_stack_trace();
@@ -178,3 +178,28 @@
 	xfs_error_report(tag, level, mp, filename, linenum, ra);
 	xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair");
 }
+
+/*
+ * Warnings specifically for verifier errors.  Differentiate CRC vs. invalid
+ * values, and omit the stack trace unless the error level is tuned high.
+ */
+void
+xfs_verifier_error(
+	struct xfs_buf		*bp)
+{
+	struct xfs_mount *mp = bp->b_target->bt_mount;
+
+	xfs_alert(mp, "Metadata %s detected at %pF, block 0x%llx",
+		  bp->b_error == EFSBADCRC ? "CRC error" : "corruption",
+		  __return_address, bp->b_bn);
+
+	xfs_alert(mp, "Unmount and run xfs_repair");
+
+	if (xfs_error_level >= XFS_ERRLEVEL_LOW) {
+		xfs_alert(mp, "First 64 bytes of corrupted metadata buffer:");
+		xfs_hex_dump(xfs_buf_offset(bp, 0), 64);
+	}
+
+	if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
+		xfs_stack_trace();
+}
diff --git a/fs/xfs/xfs_error.h b/fs/xfs/xfs_error.h
index 079a367..c1c57d4 100644
--- a/fs/xfs/xfs_error.h
+++ b/fs/xfs/xfs_error.h
@@ -34,6 +34,7 @@
 extern void xfs_corruption_error(const char *tag, int level,
 			struct xfs_mount *mp, void *p, const char *filename,
 			int linenum, inst_t *ra);
+extern void xfs_verifier_error(struct xfs_buf *bp);
 
 #define	XFS_ERROR_REPORT(e, lvl, mp)	\
 	xfs_error_report(e, lvl, mp, __FILE__, __LINE__, __return_address)
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 2e7989e..8fb97a6 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -823,7 +823,8 @@
 
 	if (!S_ISREG(inode->i_mode))
 		return -EINVAL;
-	if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
+	if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
+		     FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE))
 		return -EOPNOTSUPP;
 
 	xfs_ilock(ip, XFS_IOLOCK_EXCL);
@@ -831,6 +832,20 @@
 		error = xfs_free_file_space(ip, offset, len);
 		if (error)
 			goto out_unlock;
+	} else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
+		unsigned blksize_mask = (1 << inode->i_blkbits) - 1;
+
+		if (offset & blksize_mask || len & blksize_mask) {
+			error = -EINVAL;
+			goto out_unlock;
+		}
+
+		ASSERT(offset + len < i_size_read(inode));
+		new_size = i_size_read(inode) - len;
+
+		error = xfs_collapse_file_space(ip, offset, len);
+		if (error)
+			goto out_unlock;
 	} else {
 		if (!(mode & FALLOC_FL_KEEP_SIZE) &&
 		    offset + len > i_size_read(inode)) {
@@ -840,8 +855,11 @@
 				goto out_unlock;
 		}
 
-		error = xfs_alloc_file_space(ip, offset, len,
-					     XFS_BMAPI_PREALLOC);
+		if (mode & FALLOC_FL_ZERO_RANGE)
+			error = xfs_zero_file_space(ip, offset, len);
+		else
+			error = xfs_alloc_file_space(ip, offset, len,
+						     XFS_BMAPI_PREALLOC);
 		if (error)
 			goto out_unlock;
 	}
@@ -859,7 +877,7 @@
 	if (ip->i_d.di_mode & S_IXGRP)
 		ip->i_d.di_mode &= ~S_ISGID;
 
-	if (!(mode & FALLOC_FL_PUNCH_HOLE))
+	if (!(mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE)))
 		ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC;
 
 	xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
diff --git a/fs/xfs/xfs_format.h b/fs/xfs/xfs_format.h
index b6ab5a3..9898f31 100644
--- a/fs/xfs/xfs_format.h
+++ b/fs/xfs/xfs_format.h
@@ -145,6 +145,8 @@
 	__be64	sl_lsn;
 };
 
+#define XFS_SYMLINK_CRC_OFF	offsetof(struct xfs_dsymlink_hdr, sl_crc)
+
 /*
  * The maximum pathlen is 1024 bytes. Since the minimum file system
  * blocksize is 512 bytes, we can get a max of 3 extents back from
diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c
index 283a76d..8f711db 100644
--- a/fs/xfs/xfs_ialloc.c
+++ b/fs/xfs/xfs_ialloc.c
@@ -1580,18 +1580,17 @@
 	struct xfs_buf	*bp)
 {
 	struct xfs_mount *mp = bp->b_target->bt_mount;
-	int		agi_ok = 1;
 
-	if (xfs_sb_version_hascrc(&mp->m_sb))
-		agi_ok = xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length),
-					  offsetof(struct xfs_agi, agi_crc));
-	agi_ok = agi_ok && xfs_agi_verify(bp);
-
-	if (unlikely(XFS_TEST_ERROR(!agi_ok, mp, XFS_ERRTAG_IALLOC_READ_AGI,
-			XFS_RANDOM_IALLOC_READ_AGI))) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
+	if (xfs_sb_version_hascrc(&mp->m_sb) &&
+	    !xfs_buf_verify_cksum(bp, XFS_AGI_CRC_OFF))
+		xfs_buf_ioerror(bp, EFSBADCRC);
+	else if (XFS_TEST_ERROR(!xfs_agi_verify(bp), mp,
+				XFS_ERRTAG_IALLOC_READ_AGI,
+				XFS_RANDOM_IALLOC_READ_AGI))
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
-	}
+
+	if (bp->b_error)
+		xfs_verifier_error(bp);
 }
 
 static void
@@ -1602,8 +1601,8 @@
 	struct xfs_buf_log_item	*bip = bp->b_fspriv;
 
 	if (!xfs_agi_verify(bp)) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_verifier_error(bp);
 		return;
 	}
 
@@ -1612,8 +1611,7 @@
 
 	if (bip)
 		XFS_BUF_TO_AGI(bp)->agi_lsn = cpu_to_be64(bip->bli_item.li_lsn);
-	xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length),
-			 offsetof(struct xfs_agi, agi_crc));
+	xfs_buf_update_cksum(bp, XFS_AGI_CRC_OFF);
 }
 
 const struct xfs_buf_ops xfs_agi_buf_ops = {
diff --git a/fs/xfs/xfs_ialloc_btree.c b/fs/xfs/xfs_ialloc_btree.c
index c8fa5bb..7e309b1 100644
--- a/fs/xfs/xfs_ialloc_btree.c
+++ b/fs/xfs/xfs_ialloc_btree.c
@@ -243,12 +243,14 @@
 xfs_inobt_read_verify(
 	struct xfs_buf	*bp)
 {
-	if (!(xfs_btree_sblock_verify_crc(bp) &&
-	      xfs_inobt_verify(bp))) {
-		trace_xfs_btree_corrupt(bp, _RET_IP_);
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW,
-				     bp->b_target->bt_mount, bp->b_addr);
+	if (!xfs_btree_sblock_verify_crc(bp))
+		xfs_buf_ioerror(bp, EFSBADCRC);
+	else if (!xfs_inobt_verify(bp))
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
+
+	if (bp->b_error) {
+		trace_xfs_btree_corrupt(bp, _RET_IP_);
+		xfs_verifier_error(bp);
 	}
 }
 
@@ -258,9 +260,9 @@
 {
 	if (!xfs_inobt_verify(bp)) {
 		trace_xfs_btree_corrupt(bp, _RET_IP_);
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW,
-				     bp->b_target->bt_mount, bp->b_addr);
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_verifier_error(bp);
+		return;
 	}
 	xfs_btree_sblock_calc_crc(bp);
 
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 3a137e9..5e7a38f 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -42,7 +42,6 @@
 #include "xfs_bmap_util.h"
 #include "xfs_error.h"
 #include "xfs_quota.h"
-#include "xfs_dinode.h"
 #include "xfs_filestream.h"
 #include "xfs_cksum.h"
 #include "xfs_trace.h"
@@ -62,6 +61,8 @@
 
 STATIC int xfs_iflush_int(xfs_inode_t *, xfs_buf_t *);
 
+STATIC int xfs_iunlink_remove(xfs_trans_t *, xfs_inode_t *);
+
 /*
  * helper function to extract extent size hint from inode
  */
@@ -1115,7 +1116,7 @@
 {
 	xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
 
-	ASSERT(ip->i_d.di_nlink > 0);
+	ASSERT(ip->i_d.di_nlink > 0 || (VFS_I(ip)->i_state & I_LINKABLE));
 	ip->i_d.di_nlink++;
 	inc_nlink(VFS_I(ip));
 	if ((ip->i_d.di_version == 1) &&
@@ -1165,10 +1166,7 @@
 	if (XFS_FORCED_SHUTDOWN(mp))
 		return XFS_ERROR(EIO);
 
-	if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)
-		prid = xfs_get_projid(dp);
-	else
-		prid = XFS_PROJID_DEFAULT;
+	prid = xfs_get_initial_prid(dp);
 
 	/*
 	 * Make sure that we have allocated dquot(s) on disk.
@@ -1333,6 +1331,113 @@
 }
 
 int
+xfs_create_tmpfile(
+	struct xfs_inode	*dp,
+	struct dentry		*dentry,
+	umode_t			mode)
+{
+	struct xfs_mount	*mp = dp->i_mount;
+	struct xfs_inode	*ip = NULL;
+	struct xfs_trans	*tp = NULL;
+	int			error;
+	uint			cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
+	prid_t                  prid;
+	struct xfs_dquot	*udqp = NULL;
+	struct xfs_dquot	*gdqp = NULL;
+	struct xfs_dquot	*pdqp = NULL;
+	struct xfs_trans_res	*tres;
+	uint			resblks;
+
+	if (XFS_FORCED_SHUTDOWN(mp))
+		return XFS_ERROR(EIO);
+
+	prid = xfs_get_initial_prid(dp);
+
+	/*
+	 * Make sure that we have allocated dquot(s) on disk.
+	 */
+	error = xfs_qm_vop_dqalloc(dp, xfs_kuid_to_uid(current_fsuid()),
+				xfs_kgid_to_gid(current_fsgid()), prid,
+				XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT,
+				&udqp, &gdqp, &pdqp);
+	if (error)
+		return error;
+
+	resblks = XFS_IALLOC_SPACE_RES(mp);
+	tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE_TMPFILE);
+
+	tres = &M_RES(mp)->tr_create_tmpfile;
+	error = xfs_trans_reserve(tp, tres, resblks, 0);
+	if (error == ENOSPC) {
+		/* No space at all so try a "no-allocation" reservation */
+		resblks = 0;
+		error = xfs_trans_reserve(tp, tres, 0, 0);
+	}
+	if (error) {
+		cancel_flags = 0;
+		goto out_trans_cancel;
+	}
+
+	error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp,
+						pdqp, resblks, 1, 0);
+	if (error)
+		goto out_trans_cancel;
+
+	error = xfs_dir_ialloc(&tp, dp, mode, 1, 0,
+				prid, resblks > 0, &ip, NULL);
+	if (error) {
+		if (error == ENOSPC)
+			goto out_trans_cancel;
+		goto out_trans_abort;
+	}
+
+	if (mp->m_flags & XFS_MOUNT_WSYNC)
+		xfs_trans_set_sync(tp);
+
+	/*
+	 * Attach the dquot(s) to the inodes and modify them incore.
+	 * These ids of the inode couldn't have changed since the new
+	 * inode has been locked ever since it was created.
+	 */
+	xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp, pdqp);
+
+	ip->i_d.di_nlink--;
+	d_tmpfile(dentry, VFS_I(ip));
+	error = xfs_iunlink(tp, ip);
+	if (error)
+		goto out_trans_abort;
+
+	error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
+	if (error)
+		goto out_release_inode;
+
+	xfs_qm_dqrele(udqp);
+	xfs_qm_dqrele(gdqp);
+	xfs_qm_dqrele(pdqp);
+
+	return 0;
+
+ out_trans_abort:
+	cancel_flags |= XFS_TRANS_ABORT;
+ out_trans_cancel:
+	xfs_trans_cancel(tp, cancel_flags);
+ out_release_inode:
+	/*
+	 * Wait until after the current transaction is aborted to
+	 * release the inode.  This prevents recursive transactions
+	 * and deadlocks from xfs_inactive.
+	 */
+	if (ip)
+		IRELE(ip);
+
+	xfs_qm_dqrele(udqp);
+	xfs_qm_dqrele(gdqp);
+	xfs_qm_dqrele(pdqp);
+
+	return error;
+}
+
+int
 xfs_link(
 	xfs_inode_t		*tdp,
 	xfs_inode_t		*sip,
@@ -1397,6 +1502,12 @@
 
 	xfs_bmap_init(&free_list, &first_block);
 
+	if (sip->i_d.di_nlink == 0) {
+		error = xfs_iunlink_remove(tp, sip);
+		if (error)
+			goto abort_return;
+	}
+
 	error = xfs_dir_createname(tp, tdp, target_name, sip->i_ino,
 					&first_block, &free_list, resblks);
 	if (error)
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index 65e2350..396cc1f 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -20,6 +20,7 @@
 
 #include "xfs_inode_buf.h"
 #include "xfs_inode_fork.h"
+#include "xfs_dinode.h"
 
 /*
  * Kernel only inode definitions
@@ -192,6 +193,15 @@
 	ip->i_d.di_projid_lo = (__uint16_t) (projid & 0xffff);
 }
 
+static inline prid_t
+xfs_get_initial_prid(struct xfs_inode *dp)
+{
+	if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)
+		return xfs_get_projid(dp);
+
+	return XFS_PROJID_DEFAULT;
+}
+
 /*
  * In-core inode flags.
  */
@@ -323,6 +333,8 @@
 			   struct xfs_inode **ipp, struct xfs_name *ci_name);
 int		xfs_create(struct xfs_inode *dp, struct xfs_name *name,
 			   umode_t mode, xfs_dev_t rdev, struct xfs_inode **ipp);
+int		xfs_create_tmpfile(struct xfs_inode *dp, struct dentry *dentry,
+			   umode_t mode);
 int		xfs_remove(struct xfs_inode *dp, struct xfs_name *name,
 			   struct xfs_inode *ip);
 int		xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip,
diff --git a/fs/xfs/xfs_inode_buf.c b/fs/xfs/xfs_inode_buf.c
index 4fc9f39..24e9939 100644
--- a/fs/xfs/xfs_inode_buf.c
+++ b/fs/xfs/xfs_inode_buf.c
@@ -102,8 +102,7 @@
 			}
 
 			xfs_buf_ioerror(bp, EFSCORRUPTED);
-			XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_HIGH,
-					     mp, dip);
+			xfs_verifier_error(bp);
 #ifdef DEBUG
 			xfs_alert(mp,
 				"bad inode magic/vsn daddr %lld #%d (magic=%x)",
@@ -306,7 +305,7 @@
 	if (!xfs_sb_version_hascrc(&mp->m_sb))
 		return false;
 	if (!xfs_verify_cksum((char *)dip, mp->m_sb.sb_inodesize,
-			      offsetof(struct xfs_dinode, di_crc)))
+			      XFS_DINODE_CRC_OFF))
 		return false;
 	if (be64_to_cpu(dip->di_ino) != ip->i_ino)
 		return false;
@@ -327,7 +326,7 @@
 
 	ASSERT(xfs_sb_version_hascrc(&mp->m_sb));
 	crc = xfs_start_cksum((char *)dip, mp->m_sb.sb_inodesize,
-			      offsetof(struct xfs_dinode, di_crc));
+			      XFS_DINODE_CRC_OFF);
 	dip->di_crc = xfs_end_cksum(crc);
 }
 
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index 22d1cbe..3b80eba 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -128,7 +128,6 @@
 	xfs_fsblock_t	firstfsb;
 	xfs_extlen_t	extsz, temp;
 	int		nimaps;
-	int		bmapi_flag;
 	int		quota_flag;
 	int		rt;
 	xfs_trans_t	*tp;
@@ -200,18 +199,15 @@
 
 	xfs_trans_ijoin(tp, ip, 0);
 
-	bmapi_flag = 0;
-	if (offset < XFS_ISIZE(ip) || extsz)
-		bmapi_flag |= XFS_BMAPI_PREALLOC;
-
 	/*
 	 * From this point onwards we overwrite the imap pointer that the
 	 * caller gave to us.
 	 */
 	xfs_bmap_init(&free_list, &firstfsb);
 	nimaps = 1;
-	error = xfs_bmapi_write(tp, ip, offset_fsb, count_fsb, bmapi_flag,
-				&firstfsb, 0, imap, &nimaps, &free_list);
+	error = xfs_bmapi_write(tp, ip, offset_fsb, count_fsb,
+				XFS_BMAPI_PREALLOC, &firstfsb, 0,
+				imap, &nimaps, &free_list);
 	if (error)
 		goto out_bmap_cancel;
 
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index f35d5c9..89b07e4 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -39,6 +39,7 @@
 #include "xfs_da_btree.h"
 #include "xfs_dir2_priv.h"
 #include "xfs_dinode.h"
+#include "xfs_trans_space.h"
 
 #include <linux/capability.h>
 #include <linux/xattr.h>
@@ -48,6 +49,18 @@
 #include <linux/fiemap.h>
 #include <linux/slab.h>
 
+/*
+ * Directories have different lock order w.r.t. mmap_sem compared to regular
+ * files. This is due to readdir potentially triggering page faults on a user
+ * buffer inside filldir(), and this happens with the ilock on the directory
+ * held. For regular files, the lock order is the other way around - the
+ * mmap_sem is taken during the page fault, and then we lock the ilock to do
+ * block mapping. Hence we need a different class for the directory ilock so
+ * that lockdep can tell them apart.
+ */
+static struct lock_class_key xfs_nondir_ilock_class;
+static struct lock_class_key xfs_dir_ilock_class;
+
 static int
 xfs_initxattrs(
 	struct inode		*inode,
@@ -705,7 +718,6 @@
 {
 	struct xfs_mount	*mp = ip->i_mount;
 	struct inode		*inode = VFS_I(ip);
-	int			mask = iattr->ia_valid;
 	xfs_off_t		oldsize, newsize;
 	struct xfs_trans	*tp;
 	int			error;
@@ -726,8 +738,8 @@
 
 	ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
 	ASSERT(S_ISREG(ip->i_d.di_mode));
-	ASSERT((mask & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET|
-			ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0);
+	ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET|
+		ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0);
 
 	oldsize = inode->i_size;
 	newsize = iattr->ia_size;
@@ -736,7 +748,7 @@
 	 * Short circuit the truncate case for zero length files.
 	 */
 	if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) {
-		if (!(mask & (ATTR_CTIME|ATTR_MTIME)))
+		if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME)))
 			return 0;
 
 		/*
@@ -824,10 +836,11 @@
 	 * these flags set.  For all other operations the VFS set these flags
 	 * explicitly if it wants a timestamp update.
 	 */
-	if (newsize != oldsize && (!(mask & (ATTR_CTIME | ATTR_MTIME)))) {
+	if (newsize != oldsize &&
+	    !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) {
 		iattr->ia_ctime = iattr->ia_mtime =
 			current_fs_time(inode->i_sb);
-		mask |= ATTR_CTIME | ATTR_MTIME;
+		iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
 	}
 
 	/*
@@ -863,9 +876,9 @@
 		xfs_inode_clear_eofblocks_tag(ip);
 	}
 
-	if (mask & ATTR_MODE)
+	if (iattr->ia_valid & ATTR_MODE)
 		xfs_setattr_mode(ip, iattr);
-	if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
+	if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
 		xfs_setattr_time(ip, iattr);
 
 	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
@@ -1034,6 +1047,19 @@
 	return 0;
 }
 
+STATIC int
+xfs_vn_tmpfile(
+	struct inode	*dir,
+	struct dentry	*dentry,
+	umode_t		mode)
+{
+	int		error;
+
+	error = xfs_create_tmpfile(XFS_I(dir), dentry, mode);
+
+	return -error;
+}
+
 static const struct inode_operations xfs_inode_operations = {
 	.get_acl		= xfs_get_acl,
 	.set_acl		= xfs_set_acl,
@@ -1072,6 +1098,7 @@
 	.removexattr		= generic_removexattr,
 	.listxattr		= xfs_vn_listxattr,
 	.update_time		= xfs_vn_update_time,
+	.tmpfile		= xfs_vn_tmpfile,
 };
 
 static const struct inode_operations xfs_dir_ci_inode_operations = {
@@ -1099,6 +1126,7 @@
 	.removexattr		= generic_removexattr,
 	.listxattr		= xfs_vn_listxattr,
 	.update_time		= xfs_vn_update_time,
+	.tmpfile		= xfs_vn_tmpfile,
 };
 
 static const struct inode_operations xfs_symlink_inode_operations = {
@@ -1191,6 +1219,7 @@
 	xfs_diflags_to_iflags(inode, ip);
 
 	ip->d_ops = ip->i_mount->m_nondir_inode_ops;
+	lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class);
 	switch (inode->i_mode & S_IFMT) {
 	case S_IFREG:
 		inode->i_op = &xfs_inode_operations;
@@ -1198,6 +1227,7 @@
 		inode->i_mapping->a_ops = &xfs_address_space_operations;
 		break;
 	case S_IFDIR:
+		lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class);
 		if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
 			inode->i_op = &xfs_dir_ci_inode_operations;
 		else
diff --git a/fs/xfs/xfs_linux.h b/fs/xfs/xfs_linux.h
index f9bb590..825249d 100644
--- a/fs/xfs/xfs_linux.h
+++ b/fs/xfs/xfs_linux.h
@@ -119,6 +119,7 @@
 #include "xfs_iops.h"
 #include "xfs_aops.h"
 #include "xfs_super.h"
+#include "xfs_cksum.h"
 #include "xfs_buf.h"
 #include "xfs_message.h"
 
@@ -178,6 +179,7 @@
 #define ENOATTR		ENODATA		/* Attribute not found */
 #define EWRONGFS	EINVAL		/* Mount with wrong filesystem type */
 #define EFSCORRUPTED	EUCLEAN		/* Filesystem is corrupted */
+#define EFSBADCRC	EBADMSG		/* Bad CRC detected */
 
 #define SYNCHRONIZE()	barrier()
 #define __return_address __builtin_return_address(0)
diff --git a/fs/xfs/xfs_log.h b/fs/xfs/xfs_log.h
index b0f4ef7..2c40044 100644
--- a/fs/xfs/xfs_log.h
+++ b/fs/xfs/xfs_log.h
@@ -175,7 +175,7 @@
 struct xlog_ticket *xfs_log_ticket_get(struct xlog_ticket *ticket);
 void	  xfs_log_ticket_put(struct xlog_ticket *ticket);
 
-int	xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp,
+void	xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp,
 				xfs_lsn_t *commit_lsn, int flags);
 bool	xfs_log_item_in_current_chkpt(struct xfs_log_item *lip);
 
diff --git a/fs/xfs/xfs_log_cil.c b/fs/xfs/xfs_log_cil.c
index cdebd83..7e54553 100644
--- a/fs/xfs/xfs_log_cil.c
+++ b/fs/xfs/xfs_log_cil.c
@@ -205,16 +205,25 @@
 		/*
 		 * We 64-bit align the length of each iovec so that the start
 		 * of the next one is naturally aligned.  We'll need to
-		 * account for that slack space here.
+		 * account for that slack space here. Then round nbytes up
+		 * to 64-bit alignment so that the initial buffer alignment is
+		 * easy to calculate and verify.
 		 */
 		nbytes += niovecs * sizeof(uint64_t);
+		nbytes = round_up(nbytes, sizeof(uint64_t));
 
 		/* grab the old item if it exists for reservation accounting */
 		old_lv = lip->li_lv;
 
-		/* calc buffer size */
-		buf_size = sizeof(struct xfs_log_vec) + nbytes +
-				niovecs * sizeof(struct xfs_log_iovec);
+		/*
+		 * The data buffer needs to start 64-bit aligned, so round up
+		 * that space to ensure we can align it appropriately and not
+		 * overrun the buffer.
+		 */
+		buf_size = nbytes +
+			   round_up((sizeof(struct xfs_log_vec) +
+				     niovecs * sizeof(struct xfs_log_iovec)),
+				    sizeof(uint64_t));
 
 		/* compare to existing item size */
 		if (lip->li_lv && buf_size <= lip->li_lv->lv_size) {
@@ -251,6 +260,8 @@
 		/* The allocated data region lies beyond the iovec region */
 		lv->lv_buf_len = 0;
 		lv->lv_buf = (char *)lv + buf_size - nbytes;
+		ASSERT(IS_ALIGNED((unsigned long)lv->lv_buf, sizeof(uint64_t)));
+
 		lip->li_ops->iop_format(lip, lv);
 insert:
 		ASSERT(lv->lv_buf_len <= nbytes);
@@ -488,13 +499,6 @@
 	cil->xc_ctx = new_ctx;
 
 	/*
-	 * mirror the new sequence into the cil structure so that we can do
-	 * unlocked checks against the current sequence in log forces without
-	 * risking deferencing a freed context pointer.
-	 */
-	cil->xc_current_sequence = new_ctx->sequence;
-
-	/*
 	 * The switch is now done, so we can drop the context lock and move out
 	 * of a shared context. We can't just go straight to the commit record,
 	 * though - we need to synchronise with previous and future commits so
@@ -512,8 +516,15 @@
 	 * Hence we need to add this context to the committing context list so
 	 * that higher sequences will wait for us to write out a commit record
 	 * before they do.
+	 *
+	 * xfs_log_force_lsn requires us to mirror the new sequence into the cil
+	 * structure atomically with the addition of this sequence to the
+	 * committing list. This also ensures that we can do unlocked checks
+	 * against the current sequence in log forces without risking
+	 * deferencing a freed context pointer.
 	 */
 	spin_lock(&cil->xc_push_lock);
+	cil->xc_current_sequence = new_ctx->sequence;
 	list_add(&ctx->committing, &cil->xc_committing);
 	spin_unlock(&cil->xc_push_lock);
 	up_write(&cil->xc_ctx_lock);
@@ -651,8 +662,14 @@
 
 }
 
+/*
+ * xlog_cil_push_now() is used to trigger an immediate CIL push to the sequence
+ * number that is passed. When it returns, the work will be queued for
+ * @push_seq, but it won't be completed. The caller is expected to do any
+ * waiting for push_seq to complete if it is required.
+ */
 static void
-xlog_cil_push_foreground(
+xlog_cil_push_now(
 	struct xlog	*log,
 	xfs_lsn_t	push_seq)
 {
@@ -677,10 +694,8 @@
 	}
 
 	cil->xc_push_seq = push_seq;
+	queue_work(log->l_mp->m_cil_workqueue, &cil->xc_push_work);
 	spin_unlock(&cil->xc_push_lock);
-
-	/* do the push now */
-	xlog_cil_push(log);
 }
 
 bool
@@ -710,7 +725,7 @@
  * background commit, returns without it held once background commits are
  * allowed again.
  */
-int
+void
 xfs_log_commit_cil(
 	struct xfs_mount	*mp,
 	struct xfs_trans	*tp,
@@ -756,7 +771,6 @@
 	xlog_cil_push_background(log);
 
 	up_read(&cil->xc_ctx_lock);
-	return 0;
 }
 
 /*
@@ -785,7 +799,8 @@
 	 * xlog_cil_push() handles racing pushes for the same sequence,
 	 * so no need to deal with it here.
 	 */
-	xlog_cil_push_foreground(log, sequence);
+restart:
+	xlog_cil_push_now(log, sequence);
 
 	/*
 	 * See if we can find a previous sequence still committing.
@@ -793,7 +808,6 @@
 	 * before allowing the force of push_seq to go ahead. Hence block
 	 * on commits for those as well.
 	 */
-restart:
 	spin_lock(&cil->xc_push_lock);
 	list_for_each_entry(ctx, &cil->xc_committing, committing) {
 		if (ctx->sequence > sequence)
@@ -811,6 +825,28 @@
 		/* found it! */
 		commit_lsn = ctx->commit_lsn;
 	}
+
+	/*
+	 * The call to xlog_cil_push_now() executes the push in the background.
+	 * Hence by the time we have got here it our sequence may not have been
+	 * pushed yet. This is true if the current sequence still matches the
+	 * push sequence after the above wait loop and the CIL still contains
+	 * dirty objects.
+	 *
+	 * When the push occurs, it will empty the CIL and
+	 * atomically increment the currect sequence past the push sequence and
+	 * move it into the committing list. Of course, if the CIL is clean at
+	 * the time of the push, it won't have pushed the CIL at all, so in that
+	 * case we should try the push for this sequence again from the start
+	 * just in case.
+	 */
+
+	if (sequence == cil->xc_current_sequence &&
+	    !list_empty(&cil->xc_cil)) {
+		spin_unlock(&cil->xc_push_lock);
+		goto restart;
+	}
+
 	spin_unlock(&cil->xc_push_lock);
 	return commit_lsn;
 }
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 5c670f5..993cb19 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -282,22 +282,29 @@
 	struct xfs_sb	*sbp = &mp->m_sb;
 	int		error;
 	int		loud = !(flags & XFS_MFSI_QUIET);
+	const struct xfs_buf_ops *buf_ops;
 
 	ASSERT(mp->m_sb_bp == NULL);
 	ASSERT(mp->m_ddev_targp != NULL);
 
 	/*
+	 * For the initial read, we must guess at the sector
+	 * size based on the block device.  It's enough to
+	 * get the sb_sectsize out of the superblock and
+	 * then reread with the proper length.
+	 * We don't verify it yet, because it may not be complete.
+	 */
+	sector_size = xfs_getsize_buftarg(mp->m_ddev_targp);
+	buf_ops = NULL;
+
+	/*
 	 * Allocate a (locked) buffer to hold the superblock.
 	 * This will be kept around at all times to optimize
 	 * access to the superblock.
 	 */
-	sector_size = xfs_getsize_buftarg(mp->m_ddev_targp);
-
 reread:
 	bp = xfs_buf_read_uncached(mp->m_ddev_targp, XFS_SB_DADDR,
-				   BTOBB(sector_size), 0,
-				   loud ? &xfs_sb_buf_ops
-				        : &xfs_sb_quiet_buf_ops);
+				   BTOBB(sector_size), 0, buf_ops);
 	if (!bp) {
 		if (loud)
 			xfs_warn(mp, "SB buffer read failed");
@@ -331,12 +338,13 @@
 	}
 
 	/*
-	 * If device sector size is smaller than the superblock size,
-	 * re-read the superblock so the buffer is correctly sized.
+	 * Re-read the superblock so the buffer is correctly sized,
+	 * and properly verified.
 	 */
-	if (sector_size < sbp->sb_sectsize) {
+	if (buf_ops == NULL) {
 		xfs_buf_relse(bp);
 		sector_size = sbp->sb_sectsize;
+		buf_ops = loud ? &xfs_sb_buf_ops : &xfs_sb_quiet_buf_ops;
 		goto reread;
 	}
 
diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
index a6a76b2..ec5ca65 100644
--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -842,7 +842,7 @@
 		/*
 		 * Reserve space & log for one extent added to the file.
 		 */
-		error = xfs_trans_reserve(tp, &M_RES(mp)->tr_growdata,
+		error = xfs_trans_reserve(tp, &M_RES(mp)->tr_growrtalloc,
 					  resblks, 0);
 		if (error)
 			goto error_cancel;
diff --git a/fs/xfs/xfs_sb.c b/fs/xfs/xfs_sb.c
index b7c9aea..0c0e41b 100644
--- a/fs/xfs/xfs_sb.c
+++ b/fs/xfs/xfs_sb.c
@@ -288,6 +288,7 @@
 	    sbp->sb_inodelog < XFS_DINODE_MIN_LOG			||
 	    sbp->sb_inodelog > XFS_DINODE_MAX_LOG			||
 	    sbp->sb_inodesize != (1 << sbp->sb_inodelog)		||
+	    sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) ||
 	    (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog)	||
 	    (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE)	||
 	    (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE)	||
@@ -295,8 +296,7 @@
 	    sbp->sb_dblocks == 0					||
 	    sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp)			||
 	    sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp))) {
-		XFS_CORRUPTION_ERROR("SB sanity check failed",
-				XFS_ERRLEVEL_LOW, mp, sbp);
+		xfs_notice(mp, "SB sanity check failed");
 		return XFS_ERROR(EFSCORRUPTED);
 	}
 
@@ -611,12 +611,11 @@
 						XFS_SB_VERSION_5) ||
 	     dsb->sb_crc != 0)) {
 
-		if (!xfs_verify_cksum(bp->b_addr, be16_to_cpu(dsb->sb_sectsize),
-				      offsetof(struct xfs_sb, sb_crc))) {
+		if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) {
 			/* Only fail bad secondaries on a known V5 filesystem */
-			if (bp->b_bn != XFS_SB_DADDR &&
+			if (bp->b_bn == XFS_SB_DADDR ||
 			    xfs_sb_version_hascrc(&mp->m_sb)) {
-				error = EFSCORRUPTED;
+				error = EFSBADCRC;
 				goto out_error;
 			}
 		}
@@ -625,10 +624,9 @@
 
 out_error:
 	if (error) {
-		if (error != EWRONGFS)
-			XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW,
-					     mp, bp->b_addr);
 		xfs_buf_ioerror(bp, error);
+		if (error == EFSCORRUPTED || error == EFSBADCRC)
+			xfs_verifier_error(bp);
 	}
 }
 
@@ -644,7 +642,6 @@
 {
 	struct xfs_dsb	*dsb = XFS_BUF_TO_SBP(bp);
 
-
 	if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) {
 		/* XFS filesystem, verify noisily! */
 		xfs_sb_read_verify(bp);
@@ -664,9 +661,8 @@
 
 	error = xfs_sb_verify(bp, false);
 	if (error) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW,
-				     mp, bp->b_addr);
 		xfs_buf_ioerror(bp, error);
+		xfs_verifier_error(bp);
 		return;
 	}
 
@@ -676,8 +672,7 @@
 	if (bip)
 		XFS_BUF_TO_SBP(bp)->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn);
 
-	xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length),
-			 offsetof(struct xfs_sb, sb_crc));
+	xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF);
 }
 
 const struct xfs_buf_ops xfs_sb_buf_ops = {
diff --git a/fs/xfs/xfs_sb.h b/fs/xfs/xfs_sb.h
index 35061d4..f7b2fe7 100644
--- a/fs/xfs/xfs_sb.h
+++ b/fs/xfs/xfs_sb.h
@@ -182,6 +182,8 @@
 	/* must be padded to 64 bit alignment */
 } xfs_sb_t;
 
+#define XFS_SB_CRC_OFF		offsetof(struct xfs_sb, sb_crc)
+
 /*
  * Superblock - on disk version.  Must match the in core version above.
  * Must be padded to 64 bit alignment.
diff --git a/fs/xfs/xfs_shared.h b/fs/xfs/xfs_shared.h
index 8c5035a1..4484e51 100644
--- a/fs/xfs/xfs_shared.h
+++ b/fs/xfs/xfs_shared.h
@@ -104,7 +104,8 @@
 #define	XFS_TRANS_SB_COUNT		41
 #define	XFS_TRANS_CHECKPOINT		42
 #define	XFS_TRANS_ICREATE		43
-#define	XFS_TRANS_TYPE_MAX		43
+#define	XFS_TRANS_CREATE_TMPFILE	44
+#define	XFS_TRANS_TYPE_MAX		44
 /* new transaction types need to be reflected in xfs_logprint(8) */
 
 #define XFS_TRANS_TYPES \
@@ -112,6 +113,7 @@
 	{ XFS_TRANS_SETATTR_SIZE,	"SETATTR_SIZE" }, \
 	{ XFS_TRANS_INACTIVE,		"INACTIVE" }, \
 	{ XFS_TRANS_CREATE,		"CREATE" }, \
+	{ XFS_TRANS_CREATE_TMPFILE,	"CREATE_TMPFILE" }, \
 	{ XFS_TRANS_CREATE_TRUNC,	"CREATE_TRUNC" }, \
 	{ XFS_TRANS_TRUNCATE_FILE,	"TRUNCATE_FILE" }, \
 	{ XFS_TRANS_REMOVE,		"REMOVE" }, \
diff --git a/fs/xfs/xfs_symlink.c b/fs/xfs/xfs_symlink.c
index 5fda189..52979aa 100644
--- a/fs/xfs/xfs_symlink.c
+++ b/fs/xfs/xfs_symlink.c
@@ -212,10 +212,7 @@
 		return XFS_ERROR(ENAMETOOLONG);
 
 	udqp = gdqp = NULL;
-	if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)
-		prid = xfs_get_projid(dp);
-	else
-		prid = XFS_PROJID_DEFAULT;
+	prid = xfs_get_initial_prid(dp);
 
 	/*
 	 * Make sure that we have allocated dquot(s) on disk.
diff --git a/fs/xfs/xfs_symlink_remote.c b/fs/xfs/xfs_symlink_remote.c
index bf59a2b..9b32052 100644
--- a/fs/xfs/xfs_symlink_remote.c
+++ b/fs/xfs/xfs_symlink_remote.c
@@ -133,12 +133,13 @@
 	if (!xfs_sb_version_hascrc(&mp->m_sb))
 		return;
 
-	if (!xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length),
-				  offsetof(struct xfs_dsymlink_hdr, sl_crc)) ||
-	    !xfs_symlink_verify(bp)) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
+	if (!xfs_buf_verify_cksum(bp, XFS_SYMLINK_CRC_OFF))
+		xfs_buf_ioerror(bp, EFSBADCRC);
+	else if (!xfs_symlink_verify(bp))
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
-	}
+
+	if (bp->b_error)
+		xfs_verifier_error(bp);
 }
 
 static void
@@ -153,8 +154,8 @@
 		return;
 
 	if (!xfs_symlink_verify(bp)) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
 		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_verifier_error(bp);
 		return;
 	}
 
@@ -162,8 +163,7 @@
 		struct xfs_dsymlink_hdr *dsl = bp->b_addr;
 		dsl->sl_lsn = cpu_to_be64(bip->bli_item.li_lsn);
 	}
-	xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length),
-			 offsetof(struct xfs_dsymlink_hdr, sl_crc));
+	xfs_buf_update_cksum(bp, XFS_SYMLINK_CRC_OFF);
 }
 
 const struct xfs_buf_ops xfs_symlink_buf_ops = {
diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
index 425dfa4..a4ae41c 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -603,6 +603,7 @@
 DEFINE_INODE_EVENT(xfs_inactive_symlink);
 DEFINE_INODE_EVENT(xfs_alloc_file_space);
 DEFINE_INODE_EVENT(xfs_free_file_space);
+DEFINE_INODE_EVENT(xfs_collapse_file_space);
 DEFINE_INODE_EVENT(xfs_readdir);
 #ifdef CONFIG_XFS_POSIX_ACL
 DEFINE_INODE_EVENT(xfs_get_acl);
diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
index c812c5c0..54a5732 100644
--- a/fs/xfs/xfs_trans.c
+++ b/fs/xfs/xfs_trans.c
@@ -887,12 +887,7 @@
 		xfs_trans_apply_sb_deltas(tp);
 	xfs_trans_apply_dquot_deltas(tp);
 
-	error = xfs_log_commit_cil(mp, tp, &commit_lsn, flags);
-	if (error == ENOMEM) {
-		xfs_force_shutdown(mp, SHUTDOWN_LOG_IO_ERROR);
-		error = XFS_ERROR(EIO);
-		goto out_unreserve;
-	}
+	xfs_log_commit_cil(mp, tp, &commit_lsn, flags);
 
 	current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
 	xfs_trans_free(tp);
@@ -902,10 +897,7 @@
 	 * log out now and wait for it.
 	 */
 	if (sync) {
-		if (!error) {
-			error = _xfs_log_force_lsn(mp, commit_lsn,
-				      XFS_LOG_SYNC, NULL);
-		}
+		error = _xfs_log_force_lsn(mp, commit_lsn, XFS_LOG_SYNC, NULL);
 		XFS_STATS_INC(xs_trans_sync);
 	} else {
 		XFS_STATS_INC(xs_trans_async);
diff --git a/fs/xfs/xfs_trans_resv.c b/fs/xfs/xfs_trans_resv.c
index c486e4b..ae36816 100644
--- a/fs/xfs/xfs_trans_resv.c
+++ b/fs/xfs/xfs_trans_resv.c
@@ -212,6 +212,19 @@
 }
 
 /*
+ * For removing an inode from unlinked list at first, we can modify:
+ *    the agi hash list and counters: sector size
+ *    the on disk inode before ours in the agi hash list: inode cluster size
+ */
+STATIC uint
+xfs_calc_iunlink_remove_reservation(
+	struct xfs_mount        *mp)
+{
+	return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) +
+	       max_t(uint, XFS_FSB_TO_B(mp, 1), mp->m_inode_cluster_size);
+}
+
+/*
  * For creating a link to an inode:
  *    the parent directory inode: inode size
  *    the linked inode: inode size
@@ -228,6 +241,7 @@
 	struct xfs_mount	*mp)
 {
 	return XFS_DQUOT_LOGRES(mp) +
+		xfs_calc_iunlink_remove_reservation(mp) +
 		MAX((xfs_calc_inode_res(mp, 2) +
 		     xfs_calc_buf_res(XFS_DIROP_LOG_COUNT(mp),
 				      XFS_FSB_TO_B(mp, 1))),
@@ -237,6 +251,18 @@
 }
 
 /*
+ * For adding an inode to unlinked list we can modify:
+ *    the agi hash list: sector size
+ *    the unlinked inode: inode size
+ */
+STATIC uint
+xfs_calc_iunlink_add_reservation(xfs_mount_t *mp)
+{
+	return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) +
+		xfs_calc_inode_res(mp, 1);
+}
+
+/*
  * For removing a directory entry we can modify:
  *    the parent directory inode: inode size
  *    the removed inode: inode size
@@ -253,10 +279,11 @@
 	struct xfs_mount	*mp)
 {
 	return XFS_DQUOT_LOGRES(mp) +
-		MAX((xfs_calc_inode_res(mp, 2) +
+		xfs_calc_iunlink_add_reservation(mp) +
+		MAX((xfs_calc_inode_res(mp, 1) +
 		     xfs_calc_buf_res(XFS_DIROP_LOG_COUNT(mp),
 				      XFS_FSB_TO_B(mp, 1))),
-		    (xfs_calc_buf_res(5, mp->m_sb.sb_sectsize) +
+		    (xfs_calc_buf_res(4, mp->m_sb.sb_sectsize) +
 		     xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 2),
 				      XFS_FSB_TO_B(mp, 1))));
 }
@@ -351,6 +378,20 @@
 
 }
 
+STATIC uint
+xfs_calc_create_tmpfile_reservation(
+	struct xfs_mount        *mp)
+{
+	uint	res = XFS_DQUOT_LOGRES(mp);
+
+	if (xfs_sb_version_hascrc(&mp->m_sb))
+		res += xfs_calc_icreate_resv_alloc(mp);
+	else
+		res += xfs_calc_create_resv_alloc(mp);
+
+	return res + xfs_calc_iunlink_add_reservation(mp);
+}
+
 /*
  * Making a new directory is the same as creating a new file.
  */
@@ -391,9 +432,9 @@
 {
 	return XFS_DQUOT_LOGRES(mp) +
 		xfs_calc_inode_res(mp, 1) +
-		xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) +
+		xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) +
 		xfs_calc_buf_res(1, XFS_FSB_TO_B(mp, 1)) +
-		max_t(uint, XFS_FSB_TO_B(mp, 1), mp->m_inode_cluster_size) +
+		xfs_calc_iunlink_remove_reservation(mp) +
 		xfs_calc_buf_res(1, 0) +
 		xfs_calc_buf_res(2 + mp->m_ialloc_blks +
 				 mp->m_in_maxlevels, 0) +
@@ -652,15 +693,14 @@
 
 /*
  * Allocating quota on disk if needed.
- *	the write transaction log space: M_RES(mp)->tr_write.tr_logres
+ *	the write transaction log space for quota file extent allocation
  *	the unit of quota allocation: one system block size
  */
 STATIC uint
 xfs_calc_qm_dqalloc_reservation(
 	struct xfs_mount	*mp)
 {
-	ASSERT(M_RES(mp)->tr_write.tr_logres);
-	return M_RES(mp)->tr_write.tr_logres +
+	return xfs_calc_write_reservation(mp) +
 		xfs_calc_buf_res(1,
 			XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB) - 1);
 }
@@ -737,6 +777,11 @@
 	resp->tr_create.tr_logcount = XFS_CREATE_LOG_COUNT;
 	resp->tr_create.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
 
+	resp->tr_create_tmpfile.tr_logres =
+			xfs_calc_create_tmpfile_reservation(mp);
+	resp->tr_create_tmpfile.tr_logcount = XFS_CREATE_TMPFILE_LOG_COUNT;
+	resp->tr_create_tmpfile.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
+
 	resp->tr_mkdir.tr_logres = xfs_calc_mkdir_reservation(mp);
 	resp->tr_mkdir.tr_logcount = XFS_MKDIR_LOG_COUNT;
 	resp->tr_mkdir.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
@@ -792,7 +837,6 @@
 	/* The following transaction are logged in logical format */
 	resp->tr_ichange.tr_logres = xfs_calc_ichange_reservation(mp);
 	resp->tr_growdata.tr_logres = xfs_calc_growdata_reservation(mp);
-	resp->tr_swrite.tr_logres = xfs_calc_swrite_reservation(mp);
 	resp->tr_fsyncts.tr_logres = xfs_calc_swrite_reservation(mp);
 	resp->tr_writeid.tr_logres = xfs_calc_writeid_reservation(mp);
 	resp->tr_attrsetrt.tr_logres = xfs_calc_attrsetrt_reservation(mp);
diff --git a/fs/xfs/xfs_trans_resv.h b/fs/xfs/xfs_trans_resv.h
index de7de9a..1097d14 100644
--- a/fs/xfs/xfs_trans_resv.h
+++ b/fs/xfs/xfs_trans_resv.h
@@ -38,11 +38,11 @@
 	struct xfs_trans_res	tr_remove;	/* unlink trans */
 	struct xfs_trans_res	tr_symlink;	/* symlink trans */
 	struct xfs_trans_res	tr_create;	/* create trans */
+	struct xfs_trans_res	tr_create_tmpfile; /* create O_TMPFILE trans */
 	struct xfs_trans_res	tr_mkdir;	/* mkdir trans */
 	struct xfs_trans_res	tr_ifree;	/* inode free trans */
 	struct xfs_trans_res	tr_ichange;	/* inode update trans */
 	struct xfs_trans_res	tr_growdata;	/* fs data section grow trans */
-	struct xfs_trans_res	tr_swrite;	/* sync write inode trans */
 	struct xfs_trans_res	tr_addafork;	/* add inode attr fork trans */
 	struct xfs_trans_res	tr_writeid;	/* write setuid/setgid file */
 	struct xfs_trans_res	tr_attrinval;	/* attr fork buffer
@@ -100,6 +100,7 @@
 #define	XFS_ITRUNCATE_LOG_COUNT		2
 #define XFS_INACTIVE_LOG_COUNT		2
 #define	XFS_CREATE_LOG_COUNT		2
+#define	XFS_CREATE_TMPFILE_LOG_COUNT	2
 #define	XFS_MKDIR_LOG_COUNT		3
 #define	XFS_SYMLINK_LOG_COUNT		3
 #define	XFS_REMOVE_LOG_COUNT		2
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 09f553c..f7faefc 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2527,6 +2527,9 @@
 
 	/* filesystem does not support filling holes */
 	DIO_SKIP_HOLES	= 0x02,
+
+	/* filesystem can handle aio writes beyond i_size */
+	DIO_ASYNC_EXTEND = 0x04,
 };
 
 void dio_end_io(struct bio *bio, int error);
diff --git a/include/uapi/linux/falloc.h b/include/uapi/linux/falloc.h
index 990c4cc..d1197ae 100644
--- a/include/uapi/linux/falloc.h
+++ b/include/uapi/linux/falloc.h
@@ -5,5 +5,40 @@
 #define FALLOC_FL_PUNCH_HOLE	0x02 /* de-allocates range */
 #define FALLOC_FL_NO_HIDE_STALE	0x04 /* reserved codepoint */
 
+/*
+ * FALLOC_FL_COLLAPSE_RANGE is used to remove a range of a file
+ * without leaving a hole in the file. The contents of the file beyond
+ * the range being removed is appended to the start offset of the range
+ * being removed (i.e. the hole that was punched is "collapsed"),
+ * resulting in a file layout that looks like the range that was
+ * removed never existed. As such collapsing a range of a file changes
+ * the size of the file, reducing it by the same length of the range
+ * that has been removed by the operation.
+ *
+ * Different filesystems may implement different limitations on the
+ * granularity of the operation. Most will limit operations to
+ * filesystem block size boundaries, but this boundary may be larger or
+ * smaller depending on the filesystem and/or the configuration of the
+ * filesystem or file.
+ *
+ * Attempting to collapse a range that crosses the end of the file is
+ * considered an illegal operation - just use ftruncate(2) if you need
+ * to collapse a range that crosses EOF.
+ */
+#define FALLOC_FL_COLLAPSE_RANGE	0x08
+
+/*
+ * FALLOC_FL_ZERO_RANGE is used to convert a range of file to zeros preferably
+ * without issuing data IO. Blocks should be preallocated for the regions that
+ * span holes in the file, and the entire range is preferable converted to
+ * unwritten extents - even though file system may choose to zero out the
+ * extent or do whatever which will result in reading zeros from the range
+ * while the range remains allocated for the file.
+ *
+ * This can be also used to preallocate blocks past EOF in the same way as
+ * with fallocate. Flag FALLOC_FL_KEEP_SIZE should cause the inode
+ * size to remain the same.
+ */
+#define FALLOC_FL_ZERO_RANGE		0x10
 
 #endif /* _UAPI_FALLOC_H_ */