Revision 6e2a4505dba0cae8faa701426185dfb7b49f537c authored by Alex Elder on 27 March 2013, 14:16:30 UTC, committed by Sage Weil on 29 March 2013, 18:32:07 UTC
A result of ENOENT from a read request for an object that's part of an rbd image indicates that there is a hole in that portion of the image. Similarly, a short read for such an object indicates that the remainder of the read should be interpreted a full read with zeros filling out the end of the request. This behavior is not correct for objects that are not backing rbd image data. Currently rbd_img_obj_request_callback() assumes it should be done for all objects. Change rbd_img_obj_request_callback() so it only does this zeroing for image objects. Encapsulate that special handling in its own function. Add an assertion that the image object request is a bio request, since we assume that (and we currently don't support any other types). This resolves a problem identified here: http://tracker.ceph.com/issues/4559 The regression was introduced by bf0d5f503dc11d6314c0503591d258d60ee9c944. Reported-by: Dan van der Ster <dan@vanderster.com> Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-off-by: Sage Weil <sage@inktank.com>
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page.h
#ifndef _XEN_PAGE_H
#define _XEN_PAGE_H
#include <asm/xen/page.h>
struct xen_memory_region {
phys_addr_t start;
phys_addr_t size;
};
#define XEN_EXTRA_MEM_MAX_REGIONS 128 /* == E820MAX */
extern __initdata
struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS];
extern unsigned long xen_released_pages;
#endif /* _XEN_PAGE_H */
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