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libceph: switch osdmap_set_max_osd() to krealloc()

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Use krealloc() instead of rolling our own.  (krealloc() with a NULL
first argument acts as a kmalloc()).  Properly initalize the new array
elements.  This is needed to make future additions to osdmap easier.

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 19:05:28 +02:00 committed by Sage Weil
parent 433fbdd31d
commit 4d60351f90
1 changed files with 17 additions and 15 deletions
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32
net/ceph/osdmap.c
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@ -646,38 +646,40 @@ void ceph_osdmap_destroy(struct ceph_osdmap *map)
}
/*
* adjust max osd value. reallocate arrays.
* Adjust max_osd value, (re)allocate arrays.
*
* The new elements are properly initialized.
*/
static int osdmap_set_max_osd(struct ceph_osdmap *map, int max)
{
u8 *state;
struct ceph_entity_addr *addr;
u32 *weight;
struct ceph_entity_addr *addr;
int i;
state = kcalloc(max, sizeof(*state), GFP_NOFS);
addr = kcalloc(max, sizeof(*addr), GFP_NOFS);
weight = kcalloc(max, sizeof(*weight), GFP_NOFS);
if (state == NULL || addr == NULL || weight == NULL) {
state = krealloc(map->osd_state, max*sizeof(*state), GFP_NOFS);
weight = krealloc(map->osd_weight, max*sizeof(*weight), GFP_NOFS);
addr = krealloc(map->osd_addr, max*sizeof(*addr), GFP_NOFS);
if (!state || !weight || !addr) {
kfree(state);
kfree(addr);
kfree(weight);
kfree(addr);
return -ENOMEM;
}
/* copy old? */
if (map->osd_state) {
memcpy(state, map->osd_state, map->max_osd*sizeof(*state));
memcpy(addr, map->osd_addr, map->max_osd*sizeof(*addr));
memcpy(weight, map->osd_weight, map->max_osd*sizeof(*weight));
kfree(map->osd_state);
kfree(map->osd_addr);
kfree(map->osd_weight);
for (i = map->max_osd; i < max; i++) {
state[i] = 0;
weight[i] = CEPH_OSD_OUT;
memset(addr + i, 0, sizeof(*addr));
}
map->osd_state = state;
map->osd_weight = weight;
map->osd_addr = addr;
map->max_osd = max;
return 0;
}