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Btrfs: fix pages truncation in btrfs_ioctl_clone() 

It's a bug in commit f81c9cdc56
(Btrfs: truncate pages from clone ioctl target range)

We should pass the dest range to the truncate function, but not the
src range.

Also move the function before locking extent state.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Li Zefan 2011-09-18 10:20:46 -04:00 committed by Chris Mason
parent 3765fefaee
commit 71ef078610
1 changed files with 4 additions and 4 deletions
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8
fs/btrfs/ioctl.c
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@ -2234,6 +2234,10 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
goto out_unlock;
}
/* truncate page cache pages from target inode range */
truncate_inode_pages_range(&inode->i_data, destoff,
PAGE_CACHE_ALIGN(destoff + len) - 1);
/* do any pending delalloc/csum calc on src, one way or
another, and lock file content */
while (1) {
@ -2250,10 +2254,6 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
btrfs_wait_ordered_range(src, off, len);
}
/* truncate page cache pages from target inode range */
truncate_inode_pages_range(&inode->i_data, off,
ALIGN(off + len, PAGE_CACHE_SIZE) - 1);
/* clone data */
key.objectid = btrfs_ino(src);
key.type = BTRFS_EXTENT_DATA_KEY;