Changes since last update:

- Fix a rounding error in the fallocate code
 - Minor code cleanups
 - Make sure to zero memory buffers before formatting metadata blocks
 - Fix a few places where we forgot to log an inode metadata update
 - Remove broken error handling that tried to clean up after a failure
   but still got it wrong
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Merge tag 'xfs-5.4-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs fixes from Darrick Wong:
 "A couple of small code cleanups and bug fixes for rounding errors,
  metadata logging errors, and an extra layer of safeguards against
  leaking memory contents.

   - Fix a rounding error in the fallocate code

   - Minor code cleanups

   - Make sure to zero memory buffers before formatting metadata blocks

   - Fix a few places where we forgot to log an inode metadata update

   - Remove broken error handling that tried to clean up after a failure
     but still got it wrong"

* tag 'xfs-5.4-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: move local to extent inode logging into bmap helper
  xfs: remove broken error handling on failed attr sf to leaf change
  xfs: log the inode on directory sf to block format change
  xfs: assure zeroed memory buffers for certain kmem allocations
  xfs: removed unused error variable from xchk_refcountbt_rec
  xfs: remove unused flags arg from xfs_get_aghdr_buf()
  xfs: Fix tail rounding in xfs_alloc_file_space()

fs/xfs/libxfs/xfs_ag.c

@@ -28,12 +28,11 @@ xfs_get_aghdr_buf(
 	struct xfs_mount	*mp,
 	xfs_daddr_t		blkno,
 	size_t			numblks,
-	int			flags,
 	const struct xfs_buf_ops *ops)
 {
 	struct xfs_buf		*bp;
 
-	bp = xfs_buf_get_uncached(mp->m_ddev_targp, numblks, flags);
+	bp = xfs_buf_get_uncached(mp->m_ddev_targp, numblks, 0);
 	if (!bp)
 		return NULL;
 
@@ -345,7 +344,7 @@ xfs_ag_init_hdr(
 {
 	struct xfs_buf		*bp;
 
-	bp = xfs_get_aghdr_buf(mp, id->daddr, id->numblks, 0, ops);
+	bp = xfs_get_aghdr_buf(mp, id->daddr, id->numblks, ops);
 	if (!bp)
 		return -ENOMEM;
 

fs/xfs/libxfs/xfs_attr_leaf.c

@@ -826,32 +826,17 @@ xfs_attr_shortform_to_leaf(
 	sf = (xfs_attr_shortform_t *)tmpbuffer;
 
 	xfs_idata_realloc(dp, -size, XFS_ATTR_FORK);
-	xfs_bmap_local_to_extents_empty(dp, XFS_ATTR_FORK);
+	xfs_bmap_local_to_extents_empty(args->trans, dp, XFS_ATTR_FORK);
 
 	bp = NULL;
 	error = xfs_da_grow_inode(args, &blkno);
-	if (error) {
-		/*
-		 * If we hit an IO error middle of the transaction inside
-		 * grow_inode(), we may have inconsistent data. Bail out.
-		 */
-		if (error == -EIO)
+	if (error)
 		goto out;
-		xfs_idata_realloc(dp, size, XFS_ATTR_FORK);	/* try to put */
-		memcpy(ifp->if_u1.if_data, tmpbuffer, size);	/* it back */
-		goto out;
-	}
 
 	ASSERT(blkno == 0);
 	error = xfs_attr3_leaf_create(args, blkno, &bp);
-	if (error) {
-		/* xfs_attr3_leaf_create may not have instantiated a block */
-		if (bp && (xfs_da_shrink_inode(args, 0, bp) != 0))
+	if (error)
 		goto out;
-		xfs_idata_realloc(dp, size, XFS_ATTR_FORK);	/* try to put */
-		memcpy(ifp->if_u1.if_data, tmpbuffer, size);	/* it back */
-		goto out;
-	}
 
 	memset((char *)&nargs, 0, sizeof(nargs));
 	nargs.dp = dp;

fs/xfs/libxfs/xfs_bmap.c

@@ -792,6 +792,7 @@ out_root_realloc:
  */
 void
 xfs_bmap_local_to_extents_empty(
+	struct xfs_trans	*tp,
 	struct xfs_inode	*ip,
 	int			whichfork)
 {
@@ -808,6 +809,7 @@ xfs_bmap_local_to_extents_empty(
 	ifp->if_u1.if_root = NULL;
 	ifp->if_height = 0;
 	XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS);
+	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
 }
 
 
@@ -840,7 +842,7 @@ xfs_bmap_local_to_extents(
 	ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL);
 
 	if (!ifp->if_bytes) {
-		xfs_bmap_local_to_extents_empty(ip, whichfork);
+		xfs_bmap_local_to_extents_empty(tp, ip, whichfork);
 		flags = XFS_ILOG_CORE;
 		goto done;
 	}
@@ -887,7 +889,7 @@ xfs_bmap_local_to_extents(
 
 	/* account for the change in fork size */
 	xfs_idata_realloc(ip, -ifp->if_bytes, whichfork);
-	xfs_bmap_local_to_extents_empty(ip, whichfork);
+	xfs_bmap_local_to_extents_empty(tp, ip, whichfork);
 	flags |= XFS_ILOG_CORE;
 
 	ifp->if_u1.if_root = NULL;

fs/xfs/libxfs/xfs_bmap.h

@@ -182,7 +182,8 @@ void	xfs_trim_extent(struct xfs_bmbt_irec *irec, xfs_fileoff_t bno,
 		xfs_filblks_t len);
 int	xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd);
 int	xfs_bmap_set_attrforkoff(struct xfs_inode *ip, int size, int *version);
-void	xfs_bmap_local_to_extents_empty(struct xfs_inode *ip, int whichfork);
+void	xfs_bmap_local_to_extents_empty(struct xfs_trans *tp,
+		struct xfs_inode *ip, int whichfork);
 void	__xfs_bmap_add_free(struct xfs_trans *tp, xfs_fsblock_t bno,
 		xfs_filblks_t len, const struct xfs_owner_info *oinfo,
 		bool skip_discard);

fs/xfs/libxfs/xfs_dir2_block.c

@@ -1096,7 +1096,7 @@ xfs_dir2_sf_to_block(
 	memcpy(sfp, oldsfp, ifp->if_bytes);
 
 	xfs_idata_realloc(dp, -ifp->if_bytes, XFS_DATA_FORK);
-	xfs_bmap_local_to_extents_empty(dp, XFS_DATA_FORK);
+	xfs_bmap_local_to_extents_empty(tp, dp, XFS_DATA_FORK);
 	dp->i_d.di_size = 0;
 
 	/*

fs/xfs/scrub/refcount.c

@@ -341,7 +341,6 @@ xchk_refcountbt_rec(
 	xfs_extlen_t		len;
 	xfs_nlink_t		refcount;
 	bool			has_cowflag;
-	int			error = 0;
 
 	bno = be32_to_cpu(rec->refc.rc_startblock);
 	len = be32_to_cpu(rec->refc.rc_blockcount);
@@ -366,7 +365,7 @@ xchk_refcountbt_rec(
 
 	xchk_refcountbt_xref(bs->sc, bno, len, refcount);
 
-	return error;
+	return 0;
 }
 
 /* Make sure we have as many refc blocks as the rmap says. */

fs/xfs/xfs_bmap_util.c

@@ -864,6 +864,7 @@ xfs_alloc_file_space(
 	xfs_filblks_t		allocatesize_fsb;
 	xfs_extlen_t		extsz, temp;
 	xfs_fileoff_t		startoffset_fsb;
+	xfs_fileoff_t		endoffset_fsb;
 	int			nimaps;
 	int			quota_flag;
 	int			rt;
@@ -891,7 +892,8 @@ xfs_alloc_file_space(
 	imapp = &imaps[0];
 	nimaps = 1;
 	startoffset_fsb	= XFS_B_TO_FSBT(mp, offset);
-	allocatesize_fsb = XFS_B_TO_FSB(mp, count);
+	endoffset_fsb = XFS_B_TO_FSB(mp, offset + count);
+	allocatesize_fsb = endoffset_fsb - startoffset_fsb;
 
 	/*
 	 * Allocate file space until done or until there is an error

fs/xfs/xfs_buf.c

@@ -345,6 +345,15 @@ xfs_buf_allocate_memory(
 	unsigned short		page_count, i;
 	xfs_off_t		start, end;
 	int			error;
+	xfs_km_flags_t		kmflag_mask = 0;
+
+	/*
+	 * assure zeroed buffer for non-read cases.
+	 */
+	if (!(flags & XBF_READ)) {
+		kmflag_mask |= KM_ZERO;
+		gfp_mask |= __GFP_ZERO;
+	}
 
 	/*
 	 * for buffers that are contained within a single page, just allocate
@@ -354,7 +363,8 @@ xfs_buf_allocate_memory(
 	size = BBTOB(bp->b_length);
 	if (size < PAGE_SIZE) {
 		int align_mask = xfs_buftarg_dma_alignment(bp->b_target);
-		bp->b_addr = kmem_alloc_io(size, align_mask, KM_NOFS);
+		bp->b_addr = kmem_alloc_io(size, align_mask,
+					   KM_NOFS | kmflag_mask);
 		if (!bp->b_addr) {
 			/* low memory - use alloc_page loop instead */
 			goto use_alloc_page;

fs/xfs/xfs_log.c

@@ -1443,7 +1443,7 @@ xlog_alloc_log(
 		prev_iclog = iclog;
 
 		iclog->ic_data = kmem_alloc_io(log->l_iclog_size, align_mask,
-						KM_MAYFAIL);
+						KM_MAYFAIL | KM_ZERO);
 		if (!iclog->ic_data)
 			goto out_free_iclog;
 #ifdef DEBUG

fs/xfs/xfs_log_recover.c

@@ -127,7 +127,7 @@ xlog_alloc_buffer(
 	if (nbblks > 1 && log->l_sectBBsize > 1)
 		nbblks += log->l_sectBBsize;
 	nbblks = round_up(nbblks, log->l_sectBBsize);
-	return kmem_alloc_io(BBTOB(nbblks), align_mask, KM_MAYFAIL);
+	return kmem_alloc_io(BBTOB(nbblks), align_mask, KM_MAYFAIL | KM_ZERO);
 }
 
 /*