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Alex Elder 6285bc2312 ceph: avoid 32-bit page index overflow

A pgoff_t is defined (by default) to have type (unsigned long).  On
architectures such as i686 that's a 32-bit type.  The ceph address
space code was attempting to produce 64 bit offsets by shifting a
page's index by PAGE_CACHE_SHIFT, but the result was not what was
desired because the shift occurred before the result got promoted
to 64 bits.

Fix this by converting all uses of page->index used in this way to
use the page_offset() macro, which ensures the 64-bit result has the
intended value.

This fixes http://tracker.newdream.net/issues/3112

Reported-by:  Mohamed Pakkeer <pakkeer.mohideen@realimage.com>
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>

2012-10-03 10:51:18 -05:00

addr.c

ceph: avoid 32-bit page index overflow

2012-10-03 10:51:18 -05:00

caps.c

ceph: convert to use le32_add_cpu()

2012-10-01 14:30:54 -05:00

ceph_frag.c

ceph: factor out libceph from Ceph file system

2010-10-20 15:37:28 -07:00

debugfs.c

libceph: delay debugfs initialization until we learn global_id