Merge tag 'xfs-for-linus-3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs

Pull xfs update from Dave Chinner:
 "This update contains:
   - various cleanups
   - log recovery debug hooks
   - seek hole/data implementation merge
   - extent shift rework to fix collapse range bugs
   - various sparse warning fixes
   - log recovery transaction processing rework to fix use after free
     bugs
   - metadata buffer IO infrastructuer rework to ensure all buffers
     under IO have valid reference counts
   - various fixes for ondisk flags, writeback and zero range corner
     cases"

* tag 'xfs-for-linus-3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs: (56 commits)
  xfs: fix agno increment in xfs_inumbers() loop
  xfs: xfs_iflush_done checks the wrong log item callback
  xfs: flush the range before zero range conversion
  xfs: restore buffer_head unwritten bit on ioend cancel
  xfs: check for null dquot in xfs_quota_calc_throttle()
  xfs: fix crc field handling in xfs_sb_to/from_disk
  xfs: don't send null bp to xfs_trans_brelse()
  xfs: check for inode size overflow in xfs_new_eof()
  xfs: only set extent size hint when asked
  xfs: project id inheritance is a directory only flag
  xfs: kill time.h
  xfs: compat_xfs_bstat does not have forkoff
  xfs: simplify xfs_zero_remaining_bytes
  xfs: check xfs_buf_read_uncached returns correctly
  xfs: introduce xfs_buf_submit[_wait]
  xfs: kill xfs_bioerror_relse
  xfs: xfs_bioerror can die.
  xfs: kill xfs_bdstrat_cb
  xfs: rework xfs_buf_bio_endio error handling
  xfs: xfs_buf_ioend and xfs_buf_iodone_work duplicate functionality
  ...

47 files changed, 1304 insertions, 1176 deletions

diff --git a/fs/xfs/kmem.c b/fs/xfs/kmem.c
index 844e288b9576..53e95b2a1369 100644
--- a/fs/xfs/kmem.c
+++ b/fs/xfs/kmem.c
@@ -21,7 +21,6 @@
 #include <linux/swap.h>
 #include <linux/blkdev.h>
 #include <linux/backing-dev.h>
-#include "time.h"
 #include "kmem.h"
 #include "xfs_message.h"
 
diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c
index 4bffffe038a1..eff34218f405 100644
--- a/fs/xfs/libxfs/xfs_alloc.c
+++ b/fs/xfs/libxfs/xfs_alloc.c
@@ -2209,6 +2209,10 @@ xfs_agf_verify(
 	      be32_to_cpu(agf->agf_flcount) <= XFS_AGFL_SIZE(mp)))
 		return false;
 
+	if (be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]) > XFS_BTREE_MAXLEVELS ||
+	    be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNT]) > XFS_BTREE_MAXLEVELS)
+		return false;
+
 	/*
 	 * during growfs operations, the perag is not fully initialised,
 	 * so we can't use it for any useful checking. growfs ensures we can't
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index 86df952d3e24..79c981984dca 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -5404,22 +5404,223 @@ error0:
 }
 
 /*
+ * Determine whether an extent shift can be accomplished by a merge with the
+ * extent that precedes the target hole of the shift.
+ */
+STATIC bool
+xfs_bmse_can_merge(
+	struct xfs_bmbt_irec	*left,	/* preceding extent */
+	struct xfs_bmbt_irec	*got,	/* current extent to shift */
+	xfs_fileoff_t		shift)	/* shift fsb */
+{
+	xfs_fileoff_t		startoff;
+
+	startoff = got->br_startoff - shift;
+
+	/*
+	 * The extent, once shifted, must be adjacent in-file and on-disk with
+	 * the preceding extent.
+	 */
+	if ((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))
+		return false;
+
+	return true;
+}
+
+/*
+ * A bmap extent shift adjusts the file offset of an extent to fill a preceding
+ * hole in the file. If an extent shift would result in the extent being fully
+ * adjacent to the extent that currently precedes the hole, we can merge with
+ * the preceding extent rather than do the shift.
+ *
+ * This function assumes the caller has verified a shift-by-merge is possible
+ * with the provided extents via xfs_bmse_can_merge().
+ */
+STATIC int
+xfs_bmse_merge(
+	struct xfs_inode		*ip,
+	int				whichfork,
+	xfs_fileoff_t			shift,		/* shift fsb */
+	int				current_ext,	/* idx of gotp */
+	struct xfs_bmbt_rec_host	*gotp,		/* extent to shift */
+	struct xfs_bmbt_rec_host	*leftp,		/* preceding extent */
+	struct xfs_btree_cur		*cur,
+	int				*logflags)	/* output */
+{
+	struct xfs_ifork		*ifp;
+	struct xfs_bmbt_irec		got;
+	struct xfs_bmbt_irec		left;
+	xfs_filblks_t			blockcount;
+	int				error, i;
+
+	ifp = XFS_IFORK_PTR(ip, whichfork);
+	xfs_bmbt_get_all(gotp, &got);
+	xfs_bmbt_get_all(leftp, &left);
+	blockcount = left.br_blockcount + got.br_blockcount;
+
+	ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
+	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
+	ASSERT(xfs_bmse_can_merge(&left, &got, shift));
+
+	/*
+	 * Merge the in-core extents. Note that the host record pointers and
+	 * current_ext index are invalid once the extent has been removed via
+	 * xfs_iext_remove().
+	 */
+	xfs_bmbt_set_blockcount(leftp, blockcount);
+	xfs_iext_remove(ip, current_ext, 1, 0);
+
+	/*
+	 * Update the on-disk extent count, the btree if necessary and log the
+	 * inode.
+	 */
+	XFS_IFORK_NEXT_SET(ip, whichfork,
+			   XFS_IFORK_NEXTENTS(ip, whichfork) - 1);
+	*logflags |= XFS_ILOG_CORE;
+	if (!cur) {
+		*logflags |= XFS_ILOG_DEXT;
+		return 0;
+	}
+
+	/* lookup and remove the extent to merge */
+	error = xfs_bmbt_lookup_eq(cur, got.br_startoff, got.br_startblock,
+				   got.br_blockcount, &i);
+	if (error)
+		goto out_error;
+	XFS_WANT_CORRUPTED_GOTO(i == 1, out_error);
+
+	error = xfs_btree_delete(cur, &i);
+	if (error)
+		goto out_error;
+	XFS_WANT_CORRUPTED_GOTO(i == 1, out_error);
+
+	/* lookup and update size of the previous extent */
+	error = xfs_bmbt_lookup_eq(cur, left.br_startoff, left.br_startblock,
+				   left.br_blockcount, &i);
+	if (error)
+		goto out_error;
+	XFS_WANT_CORRUPTED_GOTO(i == 1, out_error);
+
+	left.br_blockcount = blockcount;
+
+	error = xfs_bmbt_update(cur, left.br_startoff, left.br_startblock,
+				left.br_blockcount, left.br_state);
+	if (error)
+		goto out_error;
+
+	return 0;
+
+out_error:
+	return error;
+}
+
+/*
+ * Shift a single extent.
+ */
+STATIC int
+xfs_bmse_shift_one(
+	struct xfs_inode		*ip,
+	int				whichfork,
+	xfs_fileoff_t			offset_shift_fsb,
+	int				*current_ext,
+	struct xfs_bmbt_rec_host	*gotp,
+	struct xfs_btree_cur		*cur,
+	int				*logflags)
+{
+	struct xfs_ifork		*ifp;
+	xfs_fileoff_t			startoff;
+	struct xfs_bmbt_rec_host	*leftp;
+	struct xfs_bmbt_irec		got;
+	struct xfs_bmbt_irec		left;
+	int				error;
+	int				i;
+
+	ifp = XFS_IFORK_PTR(ip, whichfork);
+
+	xfs_bmbt_get_all(gotp, &got);
+	startoff = got.br_startoff - offset_shift_fsb;
+
+	/* delalloc extents should be prevented by caller */
+	XFS_WANT_CORRUPTED_GOTO(!isnullstartblock(got.br_startblock),
+				out_error);
+
+	/*
+	 * If this is the first extent in the file, make sure there's enough
+	 * room at the start of the file and jump right to the shift as there's
+	 * no left extent to merge.
+	 */
+	if (*current_ext == 0) {
+		if (got.br_startoff < offset_shift_fsb)
+			return -EINVAL;
+		goto shift_extent;
+	}
+
+	/* grab the left extent and check for a large enough hole */
+	leftp = xfs_iext_get_ext(ifp, *current_ext - 1);
+	xfs_bmbt_get_all(leftp, &left);
+
+	if (startoff < left.br_startoff + left.br_blockcount)
+		return -EINVAL;
+
+	/* check whether to merge the extent or shift it down */
+	if (!xfs_bmse_can_merge(&left, &got, offset_shift_fsb))
+		goto shift_extent;
+
+	return xfs_bmse_merge(ip, whichfork, offset_shift_fsb, *current_ext,
+			      gotp, leftp, cur, logflags);
+
+shift_extent:
+	/*
+	 * Increment the extent index for the next iteration, update the start
+	 * offset of the in-core extent and update the btree if applicable.
+	 */
+	(*current_ext)++;
+	xfs_bmbt_set_startoff(gotp, startoff);
+	*logflags |= XFS_ILOG_CORE;
+	if (!cur) {
+		*logflags |= XFS_ILOG_DEXT;
+		return 0;
+	}
+
+	error = xfs_bmbt_lookup_eq(cur, got.br_startoff, got.br_startblock,
+				   got.br_blockcount, &i);
+	if (error)
+		return error;
+	XFS_WANT_CORRUPTED_GOTO(i == 1, out_error);
+
+	got.br_startoff = startoff;
+	error = xfs_bmbt_update(cur, got.br_startoff, got.br_startblock,
+				got.br_blockcount, got.br_state);
+	if (error)
+		return error;
+
+	return 0;
+
+out_error:
+	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.
+ * The maximum number of extents to be shifted in a single operation is
+ * @num_exts. @start_fsb specifies the file offset to start the shift and the
+ * file offset where we've left off is returned in @next_fsb. @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,
+	int			*done,
+	xfs_fileoff_t		*next_fsb,
 	xfs_fsblock_t		*firstblock,
 	struct xfs_bmap_free	*flist,
 	int			num_exts)
@@ -5427,16 +5628,13 @@ xfs_bmap_shift_extents(
 	struct xfs_btree_cur		*cur = NULL;
 	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;
+	xfs_extnum_t			current_ext;
 	int				error = 0;
-	int				i;
 	int				whichfork = XFS_DATA_FORK;
 	int				logflags = 0;
-	xfs_filblks_t			blockcount = 0;
 	int				total_extents;
 
 	if (unlikely(XFS_TEST_ERROR(
@@ -5451,7 +5649,8 @@ xfs_bmap_shift_extents(
 	if (XFS_FORCED_SHUTDOWN(mp))
 		return -EIO;
 
-	ASSERT(current_ext != NULL);
+	ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
+	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 
 	ifp = XFS_IFORK_PTR(ip, whichfork);
 	if (!(ifp->if_flags & XFS_IFEXTENTS)) {
@@ -5461,23 +5660,6 @@ xfs_bmap_shift_extents(
 			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;
-		}
-	}
-
 	if (ifp->if_flags & XFS_IFBROOT) {
 		cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork);
 		cur->bc_private.b.firstblock = *firstblock;
@@ -5486,112 +5668,46 @@ xfs_bmap_shift_extents(
 	}
 
 	/*
+	 * Look up the extent index for the fsb where we start shifting. We can
+	 * henceforth iterate with current_ext as extent list changes are locked
+	 * out via ilock.
+	 *
+	 * 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.
+	 */
+	gotp = xfs_iext_bno_to_ext(ifp, start_fsb, &current_ext);
+	if (!gotp) {
+		*done = 1;
+		goto del_cursor;
+	}
+
+	/*
 	 * There may be delalloc extents in the data fork before the range we
-	 * are collapsing out, so we cannot
-	 * use the count of real extents here. Instead we have to calculate it
-	 * from the incore fork.
+	 * are collapsing out, so we cannot use the count of real extents here.
+	 * Instead we have to calculate it from the incore fork.
 	 */
 	total_extents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t);
-	while (nexts++ < num_exts && *current_ext < total_extents) {
-
-		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 = -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 = -EINVAL;
-		}
-
+	while (nexts++ < num_exts && current_ext < total_extents) {
+		error = xfs_bmse_shift_one(ip, whichfork, offset_shift_fsb,
+					&current_ext, gotp, cur, &logflags);
 		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);
-			logflags |= XFS_ILOG_CORE;
-			if (cur) {
-				error = xfs_btree_delete(cur, &i);
-				if (error)
-					goto del_cursor;
-				XFS_WANT_CORRUPTED_GOTO(i == 1, del_cursor);
-			} else {
-				logflags |= XFS_ILOG_DEXT;
-			}
-			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;
-		}
-
-		logflags |= XFS_ILOG_CORE;
-		if (cur) {
-			error = xfs_bmbt_update(cur, got.br_startoff,
-						got.br_startblock,
-						got.br_blockcount,
-						got.br_state);
-			if (error)
-				goto del_cursor;
-		} else {
-			logflags |= XFS_ILOG_DEXT;
-		}
-
-		(*current_ext)++;
+		/* update total extent count and grab the next record */
 		total_extents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t);
+		if (current_ext >= total_extents)
+			break;
+		gotp = xfs_iext_get_ext(ifp, current_ext);
 	}
 
 	/* Check if we are done */
-	if (*current_ext == total_extents)
+	if (current_ext == total_extents) {
 		*done = 1;
+	} else if (next_fsb) {
+		xfs_bmbt_get_all(gotp, &got);
+		*next_fsb = got.br_startoff;
+	}
 
 del_cursor:
 	if (cur)
@@ -5600,5 +5716,6 @@ del_cursor:
 
 	if (logflags)
 		xfs_trans_log_inode(tp, ip, logflags);
+
 	return error;
 }
diff --git a/fs/xfs/libxfs/xfs_bmap.h b/fs/xfs/libxfs/xfs_bmap.h
index b879ca56a64c..44db6db86402 100644
--- a/fs/xfs/libxfs/xfs_bmap.h
+++ b/fs/xfs/libxfs/xfs_bmap.h
@@ -178,9 +178,8 @@ 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);
+		xfs_fileoff_t start_fsb, xfs_fileoff_t offset_shift_fsb,
+		int *done, xfs_fileoff_t *next_fsb, xfs_fsblock_t *firstblock,
+		struct xfs_bmap_free *flist, int num_exts);
 
 #endif	/* __XFS_BMAP_H__ */
diff --git a/fs/xfs/libxfs/xfs_da_btree.c b/fs/xfs/libxfs/xfs_da_btree.c
index 2c42ae28d027..fd827530afec 100644
--- a/fs/xfs/libxfs/xfs_da_btree.c
+++ b/fs/xfs/libxfs/xfs_da_btree.c
@@ -2563,7 +2563,8 @@ xfs_da_get_buf(
 				    mapp, nmap, 0);
 	error = bp ? bp->b_error : -EIO;
 	if (error) {
-		xfs_trans_brelse(trans, bp);
+		if (bp)
+			xfs_trans_brelse(trans, bp);
 		goto out_free;
 	}
 
diff --git a/fs/xfs/libxfs/xfs_da_format.c b/fs/xfs/libxfs/xfs_da_format.c
index c9aee52a37e2..7e42fdfd2f1d 100644
--- a/fs/xfs/libxfs/xfs_da_format.c
+++ b/fs/xfs/libxfs/xfs_da_format.c
@@ -270,7 +270,6 @@ xfs_dir3_data_get_ftype(
 {
 	__uint8_t	ftype = dep->name[dep->namelen];
 
-	ASSERT(ftype < XFS_DIR3_FT_MAX);
 	if (ftype >= XFS_DIR3_FT_MAX)
 		return XFS_DIR3_FT_UNKNOWN;
 	return ftype;
diff --git a/fs/xfs/libxfs/xfs_dir2.c b/fs/xfs/libxfs/xfs_dir2.c
index 6cef22152fd6..7075aaf131f4 100644
--- a/fs/xfs/libxfs/xfs_dir2.c
+++ b/fs/xfs/libxfs/xfs_dir2.c
@@ -237,7 +237,8 @@ xfs_dir_init(
 }
 
 /*
-  Enter a name in a directory.
+ * Enter a name in a directory, or check for available space.
+ * If inum is 0, only the available space test is performed.
  */
 int
 xfs_dir_createname(
@@ -254,10 +255,12 @@ xfs_dir_createname(
 	int			v;		/* type-checking value */
 
 	ASSERT(S_ISDIR(dp->i_d.di_mode));
-	rval = xfs_dir_ino_validate(tp->t_mountp, inum);
-	if (rval)
-		return rval;
-	XFS_STATS_INC(xs_dir_create);
+	if (inum) {
+		rval = xfs_dir_ino_validate(tp->t_mountp, inum);
+		if (rval)
+			return rval;
+		XFS_STATS_INC(xs_dir_create);
+	}
 
 	args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
 	if (!args)
@@ -276,6 +279,8 @@ xfs_dir_createname(
 	args->whichfork = XFS_DATA_FORK;
 	args->trans = tp;
 	args->op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT;
+	if (!inum)
+		args->op_flags |= XFS_DA_OP_JUSTCHECK;
 
 	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
 		rval = xfs_dir2_sf_addname(args);
@@ -535,62 +540,14 @@ out_free:
 
 /*
  * See if this entry can be added to the directory without allocating space.
- * First checks that the caller couldn't reserve enough space (resblks = 0).
  */
 int
 xfs_dir_canenter(
 	xfs_trans_t	*tp,
 	xfs_inode_t	*dp,
-	struct xfs_name	*name,		/* name of entry to add */
-	uint		resblks)
+	struct xfs_name	*name)		/* name of entry to add */
 {
-	struct xfs_da_args *args;
-	int		rval;
-	int		v;		/* type-checking value */
-
-	if (resblks)
-		return 0;
-
-	ASSERT(S_ISDIR(dp->i_d.di_mode));
-
-	args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
-	if (!args)
-		return -ENOMEM;
-
-	args->geo = dp->i_mount->m_dir_geo;
-	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);
-		goto out_free;
-	}
-
-	rval = xfs_dir2_isblock(args, &v);
-	if (rval)
-		goto out_free;
-	if (v) {
-		rval = xfs_dir2_block_addname(args);
-		goto out_free;
-	}
-
-	rval = xfs_dir2_isleaf(args, &v);
-	if (rval)
-		goto out_free;
-	if (v)
-		rval = xfs_dir2_leaf_addname(args);
-	else
-		rval = xfs_dir2_node_addname(args);
-out_free:
-	kmem_free(args);
-	return rval;
+	return xfs_dir_createname(tp, dp, name, 0, NULL, NULL, 0);
 }
 
 /*
diff --git a/fs/xfs/libxfs/xfs_dir2.h b/fs/xfs/libxfs/xfs_dir2.h
index c8e86b0b5e99..4dff261e6ed5 100644
--- a/fs/xfs/libxfs/xfs_dir2.h
+++ b/fs/xfs/libxfs/xfs_dir2.h
@@ -136,7 +136,7 @@ extern int xfs_dir_replace(struct xfs_trans *tp, struct xfs_inode *dp,
 				xfs_fsblock_t *first,
 				struct xfs_bmap_free *flist, xfs_extlen_t tot);
 extern int xfs_dir_canenter(struct xfs_trans *tp, struct xfs_inode *dp,
-				struct xfs_name *name, uint resblks);
+				struct xfs_name *name);
 
 /*
  * Direct call from the bmap code, bypassing the generic directory layer.
diff --git a/fs/xfs/libxfs/xfs_ialloc.c b/fs/xfs/libxfs/xfs_ialloc.c
index b62771f1f4b5..23dcb72fc5e6 100644
--- a/fs/xfs/libxfs/xfs_ialloc.c
+++ b/fs/xfs/libxfs/xfs_ialloc.c
@@ -1076,8 +1076,8 @@ xfs_dialloc_ag_finobt_newino(
 	int i;
 
 	if (agi->agi_newino != cpu_to_be32(NULLAGINO)) {
-		error = xfs_inobt_lookup(cur, agi->agi_newino, XFS_LOOKUP_EQ,
-					 &i);
+		error = xfs_inobt_lookup(cur, be32_to_cpu(agi->agi_newino),
+					 XFS_LOOKUP_EQ, &i);
 		if (error)
 			return error;
 		if (i == 1) {
@@ -1085,7 +1085,6 @@ xfs_dialloc_ag_finobt_newino(
 			if (error)
 				return error;
 			XFS_WANT_CORRUPTED_RETURN(i == 1);
-
 			return 0;
 		}
 	}
@@ -2051,6 +2050,8 @@ xfs_agi_verify(
 	if (!XFS_AGI_GOOD_VERSION(be32_to_cpu(agi->agi_versionnum)))
 		return false;
 
+	if (be32_to_cpu(agi->agi_level) > XFS_BTREE_MAXLEVELS)
+		return false;
 	/*
 	 * during growfs operations, the perag is not fully initialised,
 	 * so we can't use it for any useful checking. growfs ensures we can't
diff --git a/fs/xfs/libxfs/xfs_rtbitmap.c b/fs/xfs/libxfs/xfs_rtbitmap.c
index f4dd697cac08..7c818f1e4484 100644
--- a/fs/xfs/libxfs/xfs_rtbitmap.c
+++ b/fs/xfs/libxfs/xfs_rtbitmap.c
@@ -424,20 +424,24 @@ xfs_rtfind_forw(
 }
 
 /*
- * Read and modify the summary information for a given extent size,
+ * Read and/or modify the summary information for a given extent size,
  * bitmap block combination.
  * Keeps track of a current summary block, so we don't keep reading
  * it from the buffer cache.
+ *
+ * Summary information is returned in *sum if specified.
+ * If no delta is specified, returns summary only.
  */
 int
-xfs_rtmodify_summary(
-	xfs_mount_t	*mp,		/* file system mount point */
+xfs_rtmodify_summary_int(
+	xfs_mount_t	*mp,		/* file system mount structure */
 	xfs_trans_t	*tp,		/* transaction pointer */
 	int		log,		/* log2 of extent size */
 	xfs_rtblock_t	bbno,		/* bitmap block number */
 	int		delta,		/* change to make to summary info */
 	xfs_buf_t	**rbpp,		/* in/out: summary block buffer */
-	xfs_fsblock_t	*rsb)		/* in/out: summary block number */
+	xfs_fsblock_t	*rsb,		/* in/out: summary block number */
+	xfs_suminfo_t	*sum)		/* out: summary info for this block */
 {
 	xfs_buf_t	*bp;		/* buffer for the summary block */
 	int		error;		/* error value */
@@ -456,7 +460,7 @@ xfs_rtmodify_summary(
 	/*
 	 * If we have an old buffer, and the block number matches, use that.
 	 */
-	if (rbpp && *rbpp && *rsb == sb)
+	if (*rbpp && *rsb == sb)
 		bp = *rbpp;
 	/*
 	 * Otherwise we have to get the buffer.
@@ -465,7 +469,7 @@ xfs_rtmodify_summary(
 		/*
 		 * If there was an old one, get rid of it first.
 		 */
-		if (rbpp && *rbpp)
+		if (*rbpp)
 			xfs_trans_brelse(tp, *rbpp);
 		error = xfs_rtbuf_get(mp, tp, sb, 1, &bp);
 		if (error) {
@@ -474,21 +478,38 @@ xfs_rtmodify_summary(
 		/*
 		 * Remember this buffer and block for the next call.
 		 */
-		if (rbpp) {
-			*rbpp = bp;
-			*rsb = sb;
-		}
+		*rbpp = bp;
+		*rsb = sb;
 	}
 	/*
-	 * Point to the summary information, modify and log it.
+	 * Point to the summary information, modify/log it, and/or copy it out.
 	 */
 	sp = XFS_SUMPTR(mp, bp, so);
-	*sp += delta;
-	xfs_trans_log_buf(tp, bp, (uint)((char *)sp - (char *)bp->b_addr),
-		(uint)((char *)sp - (char *)bp->b_addr + sizeof(*sp) - 1));
+	if (delta) {
+		uint first = (uint)((char *)sp - (char *)bp