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libceph: ceph_osds, ceph_pg_to_up_acting_osds()

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Knowning just acting set isn't enough, we need to be able to record up
set as well to detect interval changes.  This means returning (up[],
up_len, up_primary, acting[], acting_len, acting_primary) and passing
it around.  Introduce and switch to ceph_osds to help with that.

Rename ceph_calc_pg_acting() to ceph_pg_to_up_acting_osds() and return
both up and acting sets from it.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Ilya Dryomov
2016-04-28 16:07:22 +02:00
parent d9591f5e28
commit 6f3bfd45cd
3 changed files with 215 additions and 146 deletions
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21
include/linux/ceph/osdmap.h
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@@ -208,6 +208,20 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
struct ceph_osdmap *map);
extern void ceph_osdmap_destroy(struct ceph_osdmap *map);
struct ceph_osds {
int osds[CEPH_PG_MAX_SIZE];
int size;
int primary; /* id, NOT index */
};
static inline void ceph_osds_init(struct ceph_osds *set)
{
set->size = 0;
set->primary = -1;
}
void ceph_osds_copy(struct ceph_osds *dest, const struct ceph_osds *src);
/* calculate mapping of a file extent to an object */
extern int ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
u64 off, u64 len,
@@ -218,9 +232,10 @@ int ceph_object_locator_to_pg(struct ceph_osdmap *osdmap,
struct ceph_object_locator *oloc,
struct ceph_pg *raw_pgid);
extern int ceph_calc_pg_acting(struct ceph_osdmap *osdmap,
struct ceph_pg pgid,
int *osds, int *primary);
void ceph_pg_to_up_acting_osds(struct ceph_osdmap *osdmap,
const struct ceph_pg *raw_pgid,
struct ceph_osds *up,
struct ceph_osds *acting);
extern int ceph_calc_pg_primary(struct ceph_osdmap *osdmap,
struct ceph_pg pgid);