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libceph: introduce decode{,_new}_pools() and switch to them 

Consolidate pools (full map, map<u64, pg_pool_t>) and new_pools (inc
map, same) decoding logic into a common helper 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 19:05:27 +02:00 committed by Sage Weil
parent 0f70c7eedb
commit 433fbdd31d
1 changed files with 57 additions and 37 deletions
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94
net/ceph/osdmap.c
View File

@ -681,6 +681,55 @@ static int osdmap_set_max_osd(struct ceph_osdmap *map, int max)
return 0;
}
static int __decode_pools(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_pool_info *pi;
u64 pool;
int ret;
ceph_decode_64_safe(p, end, pool, e_inval);
pi = __lookup_pg_pool(&map->pg_pools, pool);
if (!incremental || !pi) {
pi = kzalloc(sizeof(*pi), GFP_NOFS);
if (!pi)
return -ENOMEM;
pi->id = pool;
ret = __insert_pg_pool(&map->pg_pools, pi);
if (ret) {
kfree(pi);
return ret;
}
}
ret = decode_pool(p, end, pi);
if (ret)
return ret;
}
return 0;
e_inval:
return -EINVAL;
}
static int decode_pools(void **p, void *end, struct ceph_osdmap *map)
{
return __decode_pools(p, end, map, false);
}
static int decode_new_pools(void **p, void *end, struct ceph_osdmap *map)
{
return __decode_pools(p, end, map, true);
}
/*
* decode a full map.
*/
@ -692,7 +741,6 @@ static int osdmap_decode(void **p, void *end, struct ceph_osdmap *map)
u32 max;
u32 len, i;
int err;
struct ceph_pg_pool_info *pi;
dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p));
@ -714,22 +762,10 @@ static int osdmap_decode(void **p, void *end, struct ceph_osdmap *map)
ceph_decode_copy(p, &map->created, sizeof(map->created));
ceph_decode_copy(p, &map->modified, sizeof(map->modified));
ceph_decode_32_safe(p, end, max, e_inval);
while (max--) {
ceph_decode_need(p, end, 8 + 2, e_inval);
pi = kzalloc(sizeof(*pi), GFP_NOFS);
if (!pi) {
err = -ENOMEM;
goto bad;
}
pi->id = ceph_decode_64(p);
err = decode_pool(p, end, pi);
if (err < 0) {
kfree(pi);
goto bad;
}
__insert_pg_pool(&map->pg_pools, pi);
}
/* pools */
err = decode_pools(p, end, map);
if (err)
goto bad;
/* pool_name */
err = decode_pool_names(p, end, map);
@ -934,26 +970,10 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
newcrush = NULL;
}
/* new_pool */
ceph_decode_32_safe(p, end, len, e_inval);
while (len--) {
struct ceph_pg_pool_info *pi;
ceph_decode_64_safe(p, end, pool, e_inval);
pi = __lookup_pg_pool(&map->pg_pools, pool);
if (!pi) {
pi = kzalloc(sizeof(*pi), GFP_NOFS);
if (!pi) {
err = -ENOMEM;
goto bad;
}
pi->id = pool;
__insert_pg_pool(&map->pg_pools, pi);
}
err = decode_pool(p, end, pi);
if (err < 0)
goto bad;
}
/* new_pools */
err = decode_new_pools(p, end, map);
if (err)
goto bad;
/* new_pool_names */
err = decode_pool_names(p, end, map);