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ext4: Make ext4_get_blocks_wrap take the truncate_mutex early.

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When doing a migrate from ext3 to ext4 inode we need to make sure the test
for inode type and walking inode data happens inside  lock. To make this
happen move truncate_mutex early before checking the i_flags.


This actually should enable us to remove the verify_chain().

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
This commit is contained in:
Aneesh Kumar K.V 2008-01-28 23:58:27 -05:00 • committed by Theodore Ts'o
commit c278bfeceb
3 changed files with 16 additions and 64 deletions
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2
include/linux/ext4_fs.h
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@ -1113,6 +1113,7 @@ ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, sector_t block,
int create, int extend_disksize)
{
int retval;
mutex_lock(&EXT4_I(inode)->truncate_mutex);
if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) {
retval = ext4_ext_get_blocks(handle, inode,
(ext4_lblk_t)block, max_blocks,
@ -1122,6 +1123,7 @@ ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, sector_t block,
(ext4_lblk_t)block, max_blocks,
bh, create, extend_disksize);
}
mutex_unlock(&EXT4_I(inode)->truncate_mutex);
return retval;
}