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libceph: check for invalid mapping

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If we encounter an invalid (e.g., zeroed) mapping, return an error
and avoid a divide by zero.

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
This commit is contained in:
Sage Weil
2012-09-24 20:59:48 -07:00
committed by Alex Elder
parent b905a7f8b7
commit d63b77f4c5
4 changed files with 40 additions and 18 deletions
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2
include/linux/ceph/osd_client.h
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@@ -207,7 +207,7 @@ extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
struct ceph_msg *msg);
extern void ceph_calc_raw_layout(struct ceph_osd_client *osdc,
extern int ceph_calc_raw_layout(struct ceph_osd_client *osdc,
struct ceph_file_layout *layout,
u64 snapid,
u64 off, u64 *plen, u64 *bno,