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qcow2: Use g_try_new0() for cache array 

With a variable cache size, the number given to qcow2_cache_create() may
be huge. Therefore, use g_try_new0().

While at it, use g_new0() instead of g_malloc0() for allocating the
Qcow2Cache object.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Max Reitz 2014-08-18 22:07:32 +02:00 committed by Kevin Wolf
parent 440ba08aea
commit 02004bd4ba
1 changed files with 9 additions and 4 deletions
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9
block/qcow2-cache.c
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@ -48,9 +48,12 @@ Qcow2Cache *qcow2_cache_create(BlockDriverState *bs, int num_tables)
Qcow2Cache *c;
int i;
c = g_malloc0(sizeof(*c));
c = g_new0(Qcow2Cache, 1);
c->size = num_tables;
c->entries = g_new0(Qcow2CachedTable, num_tables);
c->entries = g_try_new0(Qcow2CachedTable, num_tables);
if (!c->entries) {
goto fail;
}
for (i = 0; i < c->size; i++) {
c->entries[i].table = qemu_try_blockalign(bs->file, s->cluster_size);
@ -62,9 +65,11 @@ Qcow2Cache *qcow2_cache_create(BlockDriverState *bs, int num_tables)
return c;
fail:
if (c->entries) {
for (i = 0; i < c->size; i++) {
qemu_vfree(c->entries[i].table);
}
}
g_free(c->entries);
g_free(c);
return NULL;