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authorSage Weil <sage@newdream.net>2011-08-10 18:04:04 +0000
committerChris Mason <chris.mason@oracle.com>2011-08-16 21:09:31 -0400
commitf81c9cdc567cd3160ff9e64868d9a1a7ee226480 (patch)
treed4812f9328ea0f5945c42a6b694bdcdb7bdbd707 /fs
parent0e588859618be54ec100373f1b86296271ce5307 (diff)
Btrfs: truncate pages from clone ioctl target range
We need to truncate page cache pages for the clone ioctl target range or else we'll confuse ourselves to no end. If the old data was cached, we used to still see it (until remount). If the page was partially updated we used to get a mix of old and new data. Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/ioctl.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 2bb08862a4f..b3d249d6eba 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2244,6 +2244,10 @@ 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;