linux-ext4 - [PATCH 4/6] libext2fs: during punch, fix parent extents after modifying extent

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Date:	Mon, 20 Jan 2014 22:22:04 -0800
From:	"Darrick J. Wong" <darrick.wong@...cle.com>
To:	tytso@....edu, darrick.wong@...cle.com
Cc:	linux-ext4@...r.kernel.org
Subject: [PATCH 4/6] libext2fs: during punch,
 fix parent extents after modifying extent

When modifying/removing an extent during punch, don't forget to update
the extent's parents.

Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
---
 lib/ext2fs/punch.c |    8 ++++++++
 1 file changed, 8 insertions(+)


diff --git a/lib/ext2fs/punch.c b/lib/ext2fs/punch.c
index 657cb53..a3d020e 100644
--- a/lib/ext2fs/punch.c
+++ b/lib/ext2fs/punch.c
@@ -353,6 +353,9 @@ static errcode_t ext2fs_punch_extent(ext2_filsys fs, ext2_ino_t ino,
 		if (extent.e_len) {
 			dbg_print_extent("replacing", &extent);
 			retval = ext2fs_extent_replace(handle, 0, &extent);
+			if (retval)
+				goto errout;
+			retval = ext2fs_extent_fix_parents(handle);
 		} else {
 			struct ext2fs_extent	newex;
 			blk64_t			old_lblk, next_lblk;
@@ -387,6 +390,11 @@ static errcode_t ext2fs_punch_extent(ext2_filsys fs, ext2_ino_t ino,
 			if (retval)
 				goto errout;
 
+			retval = ext2fs_extent_fix_parents(handle);
+			if (retval && retval != EXT2_ET_NO_CURRENT_NODE)
+				goto errout;
+			retval = 0;
+
 			/* Jump forward to the next extent. */
 			ext2fs_extent_goto(handle, next_lblk);
 			op = EXT2_EXTENT_CURRENT;

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