From 91ebecc74eeeeea0a2aa50bf1964ec2214a229c9 Mon Sep 17 00:00:00 2001
From: David Chinner <dgc@sgi.com>
Date: Thu, 19 Jul 2007 16:28:30 +1000
Subject: [XFS] Allow punching holes to free space when at ENOSPC

Make the free file space transaction able to dip into the reserved blocks
to ensure that we can successfully free blocks when the filesystem is at
ENOSPC.

SGI-PV: 967788
SGI-Modid: xfs-linux-melb:xfs-kern:29167a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Vlad Apostolov <vapo@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 79b5227..401cb00 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -4434,9 +4434,12 @@ xfs_free_file_space(
 	while (!error && !done) {
 
 		/*
-		 * allocate and setup the transaction
+		 * allocate and setup the transaction. Allow this
+		 * transaction to dip into the reserve blocks to ensure
+		 * the freeing of the space succeeds at ENOSPC.
 		 */
 		tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT);
+		tp->t_flags |= XFS_TRANS_RESERVE;
 		error = xfs_trans_reserve(tp,
 					  resblks,
 					  XFS_WRITE_LOG_RES(mp),
-- 
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