Commit a77d9f7d authored by Sage Weil's avatar Sage Weil
Browse files

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: default avatarSage 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,