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libceph: primary_temp decode bits

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Add a common helper to decode both primary_temp (full map, map<pg_t,
u32>) and new_primary_temp (inc map, same) and switch to it.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
This commit is contained in:
Ilya Dryomov 2014-03-21 19:05:30 +02:00 committed by Sage Weil
parent 9686f94c8c
commit d286de796a
1 changed files with 69 additions and 0 deletions
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69
net/ceph/osdmap.c
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@ -857,6 +857,61 @@ static int decode_new_pg_temp(void **p, void *end, struct ceph_osdmap *map)
return __decode_pg_temp(p, end, map, true);
}
static int __decode_primary_temp(void **p, void *end, struct ceph_osdmap *map,
bool incremental)
{
u32 n;
ceph_decode_32_safe(p, end, n, e_inval);
while (n--) {
struct ceph_pg pgid;
u32 osd;
int ret;
ret = ceph_decode_pgid(p, end, &pgid);
if (ret)
return ret;
ceph_decode_32_safe(p, end, osd, e_inval);
ret = __remove_pg_mapping(&map->primary_temp, pgid);
BUG_ON(!incremental && ret != -ENOENT);
if (!incremental || osd != (u32)-1) {
struct ceph_pg_mapping *pg;
pg = kzalloc(sizeof(*pg), GFP_NOFS);
if (!pg)
return -ENOMEM;
pg->pgid = pgid;
pg->primary_temp.osd = osd;
ret = __insert_pg_mapping(pg, &map->primary_temp);
if (ret) {
kfree(pg);
return ret;
}
}
}
return 0;
e_inval:
return -EINVAL;
}
static int decode_primary_temp(void **p, void *end, struct ceph_osdmap *map)
{
return __decode_primary_temp(p, end, map, false);
}
static int decode_new_primary_temp(void **p, void *end,
struct ceph_osdmap *map)
{
return __decode_primary_temp(p, end, map, true);
}
/*
* decode a full map.
*/
@ -933,6 +988,13 @@ static int osdmap_decode(void **p, void *end, struct ceph_osdmap *map)
if (err)
goto bad;
/* primary_temp */
if (struct_v >= 1) {
err = decode_primary_temp(p, end, map);
if (err)
goto bad;
}
/* crush */
ceph_decode_32_safe(p, end, len, e_inval);
map->crush = crush_decode(*p, min(*p + len, end));
@ -1133,6 +1195,13 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
if (err)
goto bad;
/* new_primary_temp */
if (struct_v >= 1) {
err = decode_new_primary_temp(p, end, map);
if (err)
goto bad;
}
/* ignore the rest */
*p = end;