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Commit 9794b146 authored by Sage Weil's avatar Sage Weil
Browse files

ceph: fix memory leak when destroying osdmap with pg_temp mappings 



Also move _lookup_pg_mapping into a helper.

Signed-off-by: default avatarSage Weil <sage@newdream.net>
parent 7c1332b8

fs/ceph/osdmap.c

+33 −16
Original line number Diff line number Diff line
@@ -321,8 +321,13 @@ void ceph_osdmap_destroy(struct ceph_osdmap *map) 
	dout("osdmap_destroy %p\n", map);

	if (map->crush)

		crush_destroy(map->crush);

	while (!RB_EMPTY_ROOT(&map->pg_temp))

		rb_erase(rb_first(&map->pg_temp), &map->pg_temp);

	while (!RB_EMPTY_ROOT(&map->pg_temp)) {

		struct ceph_pg_mapping *pg =

			rb_entry(rb_first(&map->pg_temp),

				 struct ceph_pg_mapping, node);

		rb_erase(&pg->node, &map->pg_temp);

		kfree(pg);

	}

	kfree(map->osd_state);

	kfree(map->osd_weight);

	kfree(map->pg_pool);
@@ -367,7 +372,8 @@ static int osdmap_set_max_osd(struct ceph_osdmap *map, int max) 
}



/*

 * Insert a new pg_temp mapping

 * rbtree of pg_mapping for handling pg_temp (explicit mapping of pgid

 * to a set of osds)

 */

static int pgid_cmp(struct ceph_pg l, struct ceph_pg r)

{
@@ -406,6 +412,26 @@ static int __insert_pg_mapping(struct ceph_pg_mapping *new, 
	return 0;

}



static struct ceph_pg_mapping *__lookup_pg_mapping(struct rb_root *root,

						   struct ceph_pg pgid)

{

	struct rb_node *n = root->rb_node;

	struct ceph_pg_mapping *pg;

	int c;



	while (n) {

		pg = rb_entry(n, struct ceph_pg_mapping, node);

		c = pgid_cmp(pgid, pg->pgid);

		if (c < 0)

			n = n->rb_left;

		else if (c > 0)

			n = n->rb_right;

		else

			return pg;

	}

	return NULL;

}



/*

 * decode a full map.

 */
@@ -870,27 +896,18 @@ int ceph_calc_object_layout(struct ceph_object_layout *ol, 
static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg pgid,

			int *osds, int *num)

{

	struct rb_node *n = osdmap->pg_temp.rb_node;

	struct ceph_pg_mapping *pg;

	struct ceph_pg_pool_info *pool;

	int ruleno;

	unsigned poolid, ps, pps;

	int preferred;

	int c;



	/* pg_temp? */

	while (n) {

		pg = rb_entry(n, struct ceph_pg_mapping, node);

		c = pgid_cmp(pgid, pg->pgid);

		if (c < 0)

			n = n->rb_left;

		else if (c > 0)

			n = n->rb_right;

		else {

	pg = __lookup_pg_mapping(&osdmap->pg_temp, pgid);

	if (pg) {

		*num = pg->len;

		return pg->osds;

	}

	}



	/* crush */

	poolid = le32_to_cpu(pgid.pool);