From: Bill Pemberton <wfp5p@virginia.edu>
Date: Fri, 16 Apr 2010 13:01:20 +0000 (-0500)
Subject: jfs: fix diAllocExt error in resizing filesystem
X-Git-Tag: firefly_0821_release~10186^2~1656
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=637f3674cbecf9bd2073276d16ebf31b8775bf7b;p=firefly-linux-kernel-4.4.55.git

jfs: fix diAllocExt error in resizing filesystem

commit 2b0b39517d1af5294128dbc2fd7ed39c8effa540 upstream.

Resizing the filesystem would result in an diAllocExt error in some
instances because changes in bmp->db_agsize would not get noticed if
goto extendBmap was called.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Cc: jfs-discussion@lists.sourceforge.net
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/fs/jfs/resize.c b/fs/jfs/resize.c
index 7f24a0bb08ca..1aba0039f1c9 100644
--- a/fs/jfs/resize.c
+++ b/fs/jfs/resize.c
@@ -81,6 +81,7 @@ int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
 	struct inode *iplist[1];
 	struct jfs_superblock *j_sb, *j_sb2;
 	uint old_agsize;
+	int agsizechanged = 0;
 	struct buffer_head *bh, *bh2;
 
 	/* If the volume hasn't grown, get out now */
@@ -333,6 +334,9 @@ int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
 	 */
 	if ((rc = dbExtendFS(ipbmap, XAddress, nblocks)))
 		goto error_out;
+
+	agsizechanged |= (bmp->db_agsize != old_agsize);
+
 	/*
 	 * the map now has extended to cover additional nblocks:
 	 * dn_mapsize = oldMapsize + nblocks;
@@ -432,7 +436,7 @@ int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
 	 * will correctly identify the new ag);
 	 */
 	/* if new AG size the same as old AG size, done! */
-	if (bmp->db_agsize != old_agsize) {
+	if (agsizechanged) {
 		if ((rc = diExtendFS(ipimap, ipbmap)))
 			goto error_out;