Commit a77d9f7d authored Sep 11, 2010 by Sage Weil

ceph: fix file offset wrapping at 4GB on 32-bit archs



Cast the value before shifting so that we don't run out of bits with a
32-bit unsigned long.  This fixes wrapping of high file offsets into the
low 4GB of a file on disk, and the subsequent data corruption for large
files.

Signed-off-by: Sage Weil <sage@newdream.net>

parent 3612abbd

fs/ceph/addr.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -766,7 +766,8 @@ static int ceph_writepages_start(struct address_space *mapping,
		/* ok */
		if (locked_pages == 0) {
		/* prepare async write request */
		offset = page->index << PAGE_CACHE_SHIFT;
		offset = (unsigned long long)page->index
		<< PAGE_CACHE_SHIFT;
		len = wsize;
		req = ceph_osdc_new_request(&client->osdc,
		&ci->i_layout,