Linux-libre 4.2-gnu

1 files changed, 42 insertions, 47 deletions

diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index a52bbd3ab..0f34886cf 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -75,28 +75,20 @@ xfs_bmap_finish(
 	xfs_efi_log_item_t	*efi;		/* extent free intention */
 	int			error;		/* error return value */
 	xfs_bmap_free_item_t	*free;		/* free extent item */
-	struct xfs_trans_res	tres;		/* new log reservation */
 	xfs_mount_t		*mp;		/* filesystem mount structure */
 	xfs_bmap_free_item_t	*next;		/* next item on free list */
-	xfs_trans_t		*ntp;		/* new transaction pointer */
 
 	ASSERT((*tp)->t_flags & XFS_TRANS_PERM_LOG_RES);
 	if (flist->xbf_count == 0) {
 		*committed = 0;
 		return 0;
 	}
-	ntp = *tp;
-	efi = xfs_trans_get_efi(ntp, flist->xbf_count);
+	efi = xfs_trans_get_efi(*tp, flist->xbf_count);
 	for (free = flist->xbf_first; free; free = free->xbfi_next)
-		xfs_trans_log_efi_extent(ntp, efi, free->xbfi_startblock,
+		xfs_trans_log_efi_extent(*tp, efi, free->xbfi_startblock,
 			free->xbfi_blockcount);
 
-	tres.tr_logres = ntp->t_log_res;
-	tres.tr_logcount = ntp->t_log_count;
-	tres.tr_logflags = XFS_TRANS_PERM_LOG_RES;
-	ntp = xfs_trans_dup(*tp);
-	error = xfs_trans_commit(*tp, 0);
-	*tp = ntp;
+	error = xfs_trans_roll(tp, NULL);
 	*committed = 1;
 	/*
 	 * We have a new transaction, so we should return committed=1,
@@ -105,19 +97,10 @@ xfs_bmap_finish(
 	if (error)
 		return error;
 
-	/*
-	 * transaction commit worked ok so we can drop the extra ticket
-	 * reference that we gained in xfs_trans_dup()
-	 */
-	xfs_log_ticket_put(ntp->t_ticket);
-
-	error = xfs_trans_reserve(ntp, &tres, 0, 0);
-	if (error)
-		return error;
-	efd = xfs_trans_get_efd(ntp, efi, flist->xbf_count);
+	efd = xfs_trans_get_efd(*tp, efi, flist->xbf_count);
 	for (free = flist->xbf_first; free != NULL; free = next) {
 		next = free->xbfi_next;
-		if ((error = xfs_free_extent(ntp, free->xbfi_startblock,
+		if ((error = xfs_free_extent(*tp, free->xbfi_startblock,
 				free->xbfi_blockcount))) {
 			/*
 			 * The bmap free list will be cleaned up at a
@@ -127,7 +110,7 @@ xfs_bmap_finish(
 			 * happens, since this transaction may not be
 			 * dirty yet.
 			 */
-			mp = ntp->t_mountp;
+			mp = (*tp)->t_mountp;
 			if (!XFS_FORCED_SHUTDOWN(mp))
 				xfs_force_shutdown(mp,
 						   (error == -EFSCORRUPTED) ?
@@ -135,7 +118,7 @@ xfs_bmap_finish(
 						   SHUTDOWN_META_IO_ERROR);
 			return error;
 		}
-		xfs_trans_log_efd_extent(ntp, efd, free->xbfi_startblock,
+		xfs_trans_log_efd_extent(*tp, efd, free->xbfi_startblock,
 			free->xbfi_blockcount);
 		xfs_bmap_del_free(flist, NULL, free);
 	}
@@ -878,7 +861,7 @@ xfs_free_eofblocks(
 
 		if (need_iolock) {
 			if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) {
-				xfs_trans_cancel(tp, 0);
+				xfs_trans_cancel(tp);
 				return -EAGAIN;
 			}
 		}
@@ -886,7 +869,7 @@ xfs_free_eofblocks(
 		error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0);
 		if (error) {
 			ASSERT(XFS_FORCED_SHUTDOWN(mp));
-			xfs_trans_cancel(tp, 0);
+			xfs_trans_cancel(tp);
 			if (need_iolock)
 				xfs_iunlock(ip, XFS_IOLOCK_EXCL);
 			return error;
@@ -908,12 +891,9 @@ xfs_free_eofblocks(
 			 * If we get an error at this point we simply don't
 			 * bother truncating the file.
 			 */
-			xfs_trans_cancel(tp,
-					 (XFS_TRANS_RELEASE_LOG_RES |
-					  XFS_TRANS_ABORT));
+			xfs_trans_cancel(tp);
 		} else {
-			error = xfs_trans_commit(tp,
-						XFS_TRANS_RELEASE_LOG_RES);
+			error = xfs_trans_commit(tp);
 			if (!error)
 				xfs_inode_clear_eofblocks_tag(ip);
 		}
@@ -1026,7 +1006,7 @@ xfs_alloc_file_space(
 			 * Free the transaction structure.
 			 */
 			ASSERT(error == -ENOSPC || XFS_FORCED_SHUTDOWN(mp));
-			xfs_trans_cancel(tp, 0);
+			xfs_trans_cancel(tp);
 			break;
 		}
 		xfs_ilock(ip, XFS_ILOCK_EXCL);
@@ -1053,7 +1033,7 @@ xfs_alloc_file_space(
 			goto error0;
 		}
 
-		error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
+		error = xfs_trans_commit(tp);
 		xfs_iunlock(ip, XFS_ILOCK_EXCL);
 		if (error) {
 			break;
@@ -1077,7 +1057,7 @@ error0:	/* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */
 	xfs_trans_unreserve_quota_nblks(tp, ip, (long)qblocks, 0, quota_flag);
 
 error1:	/* Just cancel transaction */
-	xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
+	xfs_trans_cancel(tp);
 	xfs_iunlock(ip, XFS_ILOCK_EXCL);
 	return error;
 }
@@ -1133,14 +1113,29 @@ xfs_zero_remaining_bytes(
 			break;
 		ASSERT(imap.br_blockcount >= 1);
 		ASSERT(imap.br_startoff == offset_fsb);
+		ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
+
+		if (imap.br_startblock == HOLESTARTBLOCK ||
+		    imap.br_state == XFS_EXT_UNWRITTEN) {
+			/* skip the entire extent */
+			lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff +
+						      imap.br_blockcount) - 1;
+			continue;
+		}
+
 		lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1;
 		if (lastoffset > endoff)
 			lastoffset = endoff;
-		if (imap.br_startblock == HOLESTARTBLOCK)
-			continue;
-		ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
-		if (imap.br_state == XFS_EXT_UNWRITTEN)
+
+		/* DAX can just zero the backing device directly */
+		if (IS_DAX(VFS_I(ip))) {
+			error = dax_zero_page_range(VFS_I(ip), offset,
+						    lastoffset - offset + 1,
+						    xfs_get_blocks_direct);
+			if (error)
+				return error;
 			continue;
+		}
 
 		error = xfs_buf_read_uncached(XFS_IS_REALTIME_INODE(ip) ?
 				mp->m_rtdev_targp : mp->m_ddev_targp,
@@ -1289,7 +1284,7 @@ xfs_free_file_space(
 			 * Free the transaction structure.
 			 */
 			ASSERT(error == -ENOSPC || XFS_FORCED_SHUTDOWN(mp));
-			xfs_trans_cancel(tp, 0);
+			xfs_trans_cancel(tp);
 			break;
 		}
 		xfs_ilock(ip, XFS_ILOCK_EXCL);
@@ -1320,7 +1315,7 @@ xfs_free_file_space(
 			goto error0;
 		}
 
-		error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
+		error = xfs_trans_commit(tp);
 		xfs_iunlock(ip, XFS_ILOCK_EXCL);
 	}
 
@@ -1330,7 +1325,7 @@ xfs_free_file_space(
  error0:
 	xfs_bmap_cancel(&free_list);
  error1:
-	xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
+	xfs_trans_cancel(tp);
 	xfs_iunlock(ip, XFS_ILOCK_EXCL);
 	goto out;
 }
@@ -1462,7 +1457,7 @@ xfs_shift_file_space(
 		error = xfs_trans_reserve(tp, &M_RES(mp)->tr_write,
 				XFS_DIOSTRAT_SPACE_RES(mp, 0), 0);
 		if (error) {
-			xfs_trans_cancel(tp, 0);
+			xfs_trans_cancel(tp);
 			break;
 		}
 
@@ -1492,13 +1487,13 @@ xfs_shift_file_space(
 		if (error)
 			goto out;
 
-		error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
+		error = xfs_trans_commit(tp);
 	}
 
 	return error;
 
 out:
-	xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
+	xfs_trans_cancel(tp);
 	return error;
 }
 
@@ -1718,7 +1713,7 @@ xfs_swap_extents(
 	tp = xfs_trans_alloc(mp, XFS_TRANS_SWAPEXT);
 	error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
 	if (error) {
-		xfs_trans_cancel(tp, 0);
+		xfs_trans_cancel(tp);
 		goto out_unlock;
 	}
 
@@ -1901,7 +1896,7 @@ xfs_swap_extents(
 	if (mp->m_flags & XFS_MOUNT_WSYNC)
 		xfs_trans_set_sync(tp);
 
-	error = xfs_trans_commit(tp, 0);
+	error = xfs_trans_commit(tp);
 
 	trace_xfs_swap_extent_after(ip, 0);
 	trace_xfs_swap_extent_after(tip, 1);
@@ -1915,6 +1910,6 @@ out_unlock:
 	goto out;
 
 out_trans_cancel:
-	xfs_trans_cancel(tp, 0);
+	xfs_trans_cancel(tp);
 	goto out;
 }