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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>
This commit is contained in:
Aneesh Kumar K.V 2008-02-22 06:17:31 -05:00 committed by Theodore Ts'o
parent b35905c16a
commit 9df5643ad1
1 changed files with 8 additions and 3 deletions
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11
fs/ext4/extents.c
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@ -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