X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=fs%2Fxfs%2Fxfs_bmap_util.c;h=3bf4ad0d19e4f3203bdb36b23f74616f9c691741;hb=5ee84ba8c7f5a5dd1934459acfec6108b5285940;hp=0f34886cf7269b1cd67eadbc372655372253981b;hpb=6b476e114061599a6ab8d5464a5e16989cb98653;p=firefly-linux-kernel-4.4.55.git

diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index 0f34886cf726..3bf4ad0d19e4 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -67,16 +67,15 @@ xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb)
  */
 int						/* error */
 xfs_bmap_finish(
-	xfs_trans_t		**tp,		/* transaction pointer addr */
-	xfs_bmap_free_t		*flist,		/* i/o: list extents to free */
-	int			*committed)	/* xact committed or not */
+	struct xfs_trans		**tp,	/* transaction pointer addr */
+	struct xfs_bmap_free		*flist,	/* i/o: list extents to free */
+	int				*committed)/* xact committed or not */
 {
-	xfs_efd_log_item_t	*efd;		/* extent free data */
-	xfs_efi_log_item_t	*efi;		/* extent free intention */
-	int			error;		/* error return value */
-	xfs_bmap_free_item_t	*free;		/* free extent item */
-	xfs_mount_t		*mp;		/* filesystem mount structure */
-	xfs_bmap_free_item_t	*next;		/* next item on free list */
+	struct xfs_efd_log_item		*efd;	/* extent free data */
+	struct xfs_efi_log_item		*efi;	/* extent free intention */
+	int				error;	/* error return value */
+	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) {
@@ -88,40 +87,48 @@ xfs_bmap_finish(
 		xfs_trans_log_efi_extent(*tp, efi, free->xbfi_startblock,
 			free->xbfi_blockcount);
 
-	error = xfs_trans_roll(tp, NULL);
-	*committed = 1;
-	/*
-	 * We have a new transaction, so we should return committed=1,
-	 * even though we're returning an error.
-	 */
-	if (error)
+	error = __xfs_trans_roll(tp, NULL, committed);
+	if (error) {
+		/*
+		 * If the transaction was committed, drop the EFD reference
+		 * since we're bailing out of here. The other reference is
+		 * dropped when the EFI hits the AIL.
+		 *
+		 * If the transaction was not committed, the EFI is freed by the
+		 * EFI item unlock handler on abort. Also, we have a new
+		 * transaction so we should return committed=1 even though we're
+		 * returning an error.
+		 */
+		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;
+	}
 
+	/*
+	 * Get an EFD and free each extent in the list, logging to the EFD in
+	 * the process. The remaining bmap free list is cleaned up by the caller
+	 * on error.
+	 */
 	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(*tp, free->xbfi_startblock,
-				free->xbfi_blockcount))) {
-			/*
-			 * The bmap free list will be cleaned up at a
-			 * higher level.  The EFI will be canceled when
-			 * this transaction is aborted.
-			 * Need to force shutdown here to make sure it
-			 * happens, since this transaction may not be
-			 * dirty yet.
-			 */
-			mp = (*tp)->t_mountp;
-			if (!XFS_FORCED_SHUTDOWN(mp))
-				xfs_force_shutdown(mp,
-						   (error == -EFSCORRUPTED) ?
-						   SHUTDOWN_CORRUPT_INCORE :
-						   SHUTDOWN_META_IO_ERROR);
+
+		error = xfs_trans_free_extent(*tp, efd, free->xbfi_startblock,
+					      free->xbfi_blockcount);
+		if (error)
 			return error;
-		}
-		xfs_trans_log_efd_extent(*tp, efd, free->xbfi_startblock,
-			free->xbfi_blockcount);
+
 		xfs_bmap_del_free(flist, NULL, free);
 	}
+
 	return 0;
 }
 
@@ -1467,7 +1474,7 @@ xfs_shift_file_space(
 				XFS_DIOSTRAT_SPACE_RES(mp, 0), 0,
 				XFS_QMOPT_RES_REGBLKS);
 		if (error)
-			goto out;
+			goto out_trans_cancel;
 
 		xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
 
@@ -1481,18 +1488,20 @@ xfs_shift_file_space(
 				&done, stop_fsb, &first_block, &free_list,
 				direction, XFS_BMAP_MAX_SHIFT_EXTENTS);
 		if (error)
-			goto out;
+			goto out_bmap_cancel;
 
 		error = xfs_bmap_finish(&tp, &free_list, &committed);
 		if (error)
-			goto out;
+			goto out_bmap_cancel;
 
 		error = xfs_trans_commit(tp);
 	}
 
 	return error;
 
-out:
+out_bmap_cancel:
+	xfs_bmap_cancel(&free_list);
+out_trans_cancel:
 	xfs_trans_cancel(tp);
 	return error;
 }