Commit f81c9cdc authored by Sage Weil's avatar Sage Weil Committed by Chris Mason

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: default avatarSage Weil <sage@newdream.net>
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 0e588859
...@@ -2244,6 +2244,10 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, ...@@ -2244,6 +2244,10 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
btrfs_wait_ordered_range(src, off, len); 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 */ /* clone data */
key.objectid = btrfs_ino(src); key.objectid = btrfs_ino(src);
key.type = BTRFS_EXTENT_DATA_KEY; key.type = BTRFS_EXTENT_DATA_KEY;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment