Commit 9686f94c authored by Ilya Dryomov's avatar Ilya Dryomov Committed by Sage Weil
Browse files

libceph: primary_temp infrastructure 



Add primary_temp mappings infrastructure.  struct ceph_pg_mapping is
overloaded, primary_temp mappings are stored in an rb-tree, rooted at
ceph_osdmap, in a manner similar to pg_temp mappings.

Dump primary_temp mappings to /sys/kernel/debug/ceph/<client>/osdmap,
one 'primary_temp <pgid> <osd>' per line, e.g:

    primary_temp 2.6 4

Signed-off-by: default avatarIlya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: default avatarAlex Elder <elder@linaro.org>
parent 35a935d7

include/linux/ceph/osdmap.h

+5 −0
Original line number Diff line number Diff line
@@ -66,6 +66,9 @@ struct ceph_pg_mapping { 
			int len;

			int osds[];

		} pg_temp;

		struct {

			int osd;

		} primary_temp;

	};

};
@@ -83,6 +86,8 @@ struct ceph_osdmap { 
	struct ceph_entity_addr *osd_addr;



	struct rb_root pg_temp;

	struct rb_root primary_temp;



	struct rb_root pg_pools;

	u32 pool_max;

net/ceph/debugfs.c

+7 −0
Original line number Diff line number Diff line
@@ -93,6 +93,13 @@ static int osdmap_show(struct seq_file *s, void *p) 
				   pg->pg_temp.osds[i]);

		seq_printf(s, "]\n");

	}

	for (n = rb_first(&map->primary_temp); n; n = rb_next(n)) {

		struct ceph_pg_mapping *pg =

			rb_entry(n, struct ceph_pg_mapping, node);



		seq_printf(s, "primary_temp %llu.%x %d\n", pg->pgid.pool,

			   pg->pgid.seed, pg->primary_temp.osd);

	}



	return 0;

}

net/ceph/osdmap.c

+9 −1
Original line number Diff line number Diff line
@@ -343,7 +343,7 @@ bad: 


/*

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

 * to a set of osds)

 * to a set of osds) and primary_temp (explicit primary setting)

 */

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

{
@@ -633,6 +633,13 @@ void ceph_osdmap_destroy(struct ceph_osdmap *map) 
		rb_erase(&pg->node, &map->pg_temp);

		kfree(pg);

	}

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

		struct ceph_pg_mapping *pg =

			rb_entry(rb_first(&map->primary_temp),

				 struct ceph_pg_mapping, node);

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

		kfree(pg);

	}

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

		struct ceph_pg_pool_info *pi =

			rb_entry(rb_first(&map->pg_pools),
@@ -966,6 +973,7 @@ struct ceph_osdmap *ceph_osdmap_decode(void **p, void *end) 
		return ERR_PTR(-ENOMEM);



	map->pg_temp = RB_ROOT;

	map->primary_temp = RB_ROOT;

	mutex_init(&map->crush_scratch_mutex);



	ret = osdmap_decode(p, end, map);

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