1 files changed, 53 insertions, 28 deletions

diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index 3bf4ad0d19e4..45ec9e40150c 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -57,37 +57,66 @@ xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb)
 }
 
 /*
+ * Routine to zero an extent on disk allocated to the specific inode.
+ *
+ * The VFS functions take a linearised filesystem block offset, so we have to
+ * convert the sparse xfs fsb to the right format first.
+ * VFS types are real funky, too.
+ */
+int
+xfs_zero_extent(
+	struct xfs_inode *ip,
+	xfs_fsblock_t	start_fsb,
+	xfs_off_t	count_fsb)
+{
+	struct xfs_mount *mp = ip->i_mount;
+	xfs_daddr_t	sector = xfs_fsb_to_db(ip, start_fsb);
+	sector_t	block = XFS_BB_TO_FSBT(mp, sector);
+	ssize_t		size = XFS_FSB_TO_B(mp, count_fsb);
+
+	if (IS_DAX(VFS_I(ip)))
+		return dax_clear_blocks(VFS_I(ip), block, size);
+
+	/*
+	 * let the block layer decide on the fastest method of
+	 * implementing the zeroing.
+	 */
+	return sb_issue_zeroout(mp->m_super, block, count_fsb, GFP_NOFS);
+
+}
+
+/*
  * Routine to be called at transaction's end by xfs_bmapi, xfs_bunmapi
  * caller.  Frees all the extents that need freeing, which must be done
  * last due to locking considerations.  We never free any extents in
  * the first transaction.
  *
- * Return 1 if the given transaction was committed and a new one
- * started, and 0 otherwise in the committed parameter.
+ * If an inode *ip is provided, rejoin it to the transaction if
+ * the transaction was committed.
  */
 int						/* error */
 xfs_bmap_finish(
 	struct xfs_trans		**tp,	/* transaction pointer addr */
 	struct xfs_bmap_free		*flist,	/* i/o: list extents to free */
-	int				*committed)/* xact committed or not */
+	struct xfs_inode		*ip)
 {
 	struct xfs_efd_log_item		*efd;	/* extent free data */
 	struct xfs_efi_log_item		*efi;	/* extent free intention */
 	int				error;	/* error return value */
+	int				committed;/* xact committed or not */
 	struct xfs_bmap_free_item	*free;	/* free extent item */
 	struct xfs_bmap_free_item	*next;	/* next item on free list */
 
 	ASSERT((*tp)->t_flags & XFS_TRANS_PERM_LOG_RES);
-	if (flist->xbf_count == 0) {
-		*committed = 0;
+	if (flist->xbf_count == 0)
 		return 0;
-	}
+
 	efi = xfs_trans_get_efi(*tp, flist->xbf_count);
 	for (free = flist->xbf_first; free; free = free->xbfi_next)
 		xfs_trans_log_efi_extent(*tp, efi, free->xbfi_startblock,
 			free->xbfi_blockcount);
 
-	error = __xfs_trans_roll(tp, NULL, committed);
+	error = __xfs_trans_roll(tp, ip, &committed);
 	if (error) {
 		/*
 		 * If the transaction was committed, drop the EFD reference
@@ -99,16 +128,13 @@ xfs_bmap_finish(
 		 * transaction so we should return committed=1 even though we're
 		 * returning an error.
 		 */
-		if (*committed) {
+		if (committed) {
 			xfs_efi_release(efi);
 			xfs_force_shutdown((*tp)->t_mountp,
 				(error == -EFSCORRUPTED) ?
 					SHUTDOWN_CORRUPT_INCORE :
 					SHUTDOWN_META_IO_ERROR);
-		} else {
-			*committed = 1;
 		}
-
 		return error;
 	}
 
@@ -229,6 +255,13 @@ xfs_bmap_rtalloc(
 		xfs_trans_mod_dquot_byino(ap->tp, ap->ip,
 			ap->wasdel ? XFS_TRANS_DQ_DELRTBCOUNT :
 					XFS_TRANS_DQ_RTBCOUNT, (long) ralen);
+
+		/* Zero the extent if we were asked to do so */
+		if (ap->userdata & XFS_ALLOC_USERDATA_ZERO) {
+			error = xfs_zero_extent(ap->ip, ap->blkno, ap->length);
+			if (error)
+				return error;
+		}
 	} else {
 		ap->length = 0;
 	}
@@ -933,7 +966,6 @@ xfs_alloc_file_space(
 	xfs_bmbt_irec_t		imaps[1], *imapp;
 	xfs_bmap_free_t		free_list;
 	uint			qblocks, resblks, resrtextents;
-	int			committed;
 	int			error;
 
 	trace_xfs_alloc_file_space(ip);
@@ -1027,24 +1059,21 @@ xfs_alloc_file_space(
 		xfs_bmap_init(&free_list, &firstfsb);
 		error = xfs_bmapi_write(tp, ip, startoffset_fsb,
 					allocatesize_fsb, alloc_type, &firstfsb,
-					0, imapp, &nimaps, &free_list);
-		if (error) {
+					resblks, imapp, &nimaps, &free_list);
+		if (error)
 			goto error0;
-		}
 
 		/*
 		 * Complete the transaction
 		 */
-		error = xfs_bmap_finish(&tp, &free_list, &committed);
-		if (error) {
+		error = xfs_bmap_finish(&tp, &free_list, NULL);
+		if (error)
 			goto error0;
-		}
 
 		error = xfs_trans_commit(tp);
 		xfs_iunlock(ip, XFS_ILOCK_EXCL);
-		if (error) {
+		if (error)
 			break;
-		}
 
 		allocated_fsb = imapp->br_blockcount;
 
@@ -1170,7 +1199,6 @@ xfs_free_file_space(
 	xfs_off_t		offset,
 	xfs_off_t		len)
 {
-	int			committed;
 	int			done;
 	xfs_fileoff_t		endoffset_fsb;
 	int			error;
@@ -1310,17 +1338,15 @@ xfs_free_file_space(
 		error = xfs_bunmapi(tp, ip, startoffset_fsb,
 				  endoffset_fsb - startoffset_fsb,
 				  0, 2, &firstfsb, &free_list, &done);
-		if (error) {
+		if (error)
 			goto error0;
-		}
 
 		/*
 		 * complete the transaction
 		 */
-		error = xfs_bmap_finish(&tp, &free_list, &committed);
-		if (error) {
+		error = xfs_bmap_finish(&tp, &free_list, NULL);
+		if (error)
 			goto error0;
-		}
 
 		error = xfs_trans_commit(tp);
 		xfs_iunlock(ip, XFS_ILOCK_EXCL);
@@ -1398,7 +1424,6 @@ xfs_shift_file_space(
 	int			error;
 	struct xfs_bmap_free	free_list;
 	xfs_fsblock_t		first_block;
-	int			committed;
 	xfs_fileoff_t		stop_fsb;
 	xfs_fileoff_t		next_fsb;
 	xfs_fileoff_t		shift_fsb;
@@ -1490,7 +1515,7 @@ xfs_shift_file_space(
 		if (error)
 			goto out_bmap_cancel;
 
-		error = xfs_bmap_finish(&tp, &free_list, &committed);
+		error = xfs_bmap_finish(&tp, &free_list, NULL);
 		if (error)
 			goto out_bmap_cancel;