ceph: make object hash a pg_pool property

The object will be hashed to a placement seed (ps) based on the pg_pool's
hash function.  This allows new hashes to be introduced into an existing
object store, or selection of a hash appropriate to the objects that
will be stored in a particular pool.

Signed-off-by: Sage Weil <sage@newdream.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/ceph/rados.h b/fs/ceph/rados.h
index 85bdef78d142..fb23ff9297c9 100644
--- a/fs/ceph/rados.h
+++ b/fs/ceph/rados.h
@@ -84,6 +84,7 @@ struct ceph_pg_pool {
         __u8 type;                /* CEPH_PG_TYPE_* */
         __u8 size;                /* number of osds in each pg */
         __u8 crush_ruleset;       /* crush placement rule */
+        __u8 object_hash;         /* hash mapping object name to ps */
         __le32 pg_num, pgp_num;   /* number of pg's */
         __le32 lpg_num, lpgp_num; /* number of localized pg's */
         __le32 last_change;       /* most recent epoch changed */