From 9df5643ad135c7f8c02d3b69020de4ec910f9fc0 Mon Sep 17 00:00:00 2001
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Date: Fri, 22 Feb 2008 06:17:31 -0500
Subject: ext4: Get journal write access before modifying the extent tree
When the user was writing into an unitialized extent,
ext4_ext_convert_to_initialize() was not requesting journal write access
before it started to modify the extent tree. Fix this oversight.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---
fs/ext4/extents.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
(limited to 'fs')
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 995ac16102a..c4d6f19faf3 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -2168,6 +2168,10 @@ static int ext4_ext_convert_to_initialized(handle_t *handle,
newblock = iblock - ee_block + ext_pblock(ex);
ex2 = ex;
+ err = ext4_ext_get_access(handle, inode, path + depth);
+ if (err)
+ goto out;
+
/* ex1: ee_block to iblock - 1 : uninitialized */
if (iblock > ee_block) {
ex1 = ex;
@@ -2210,6 +2214,10 @@ static int ext4_ext_convert_to_initialized(handle_t *handle,
ex = path[depth].p_ext;
if (ex2 != &newex)
ex2 = ex;
+
+ err = ext4_ext_get_access(handle, inode, path + depth);
+ if (err)
+ goto out;
}
allocated = max_blocks;
}
@@ -2230,9 +2238,6 @@ static int ext4_ext_convert_to_initialized(handle_t *handle,
ex2->ee_len = cpu_to_le16(allocated);
if (ex2 != ex)
goto insert;
- err = ext4_ext_get_access(handle, inode, path + depth);
- if (err)
- goto out;
/*
* New (initialized) extent starts from the first block
* in the current extent. i.e., ex2 == ex
--
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