@@ -193,7 +193,7 @@ struct crush_choose_arg {
struct crush_choose_arg_map {
#ifdef __KERNEL__
struct rb_node node;
- u64 choose_args_index;
+ s64 choose_args_index;
#endif
struct crush_choose_arg *args; /*!< replacement for each bucket
in the crushmap */
@@ -2301,10 +2301,17 @@ static u32 raw_pg_to_pps(struct ceph_pg_pool_info *pi,
}
}
+/*
+ * Magic value used for a "default" fallback choose_args, used if the
+ * crush_choose_arg_map passed to do_crush() does not exist. If this
+ * also doesn't exist, fall back to canonical weights.
+ */
+#define CEPH_DEFAULT_CHOOSE_ARGS -1
+
static int do_crush(struct ceph_osdmap *map, int ruleno, int x,
int *result, int result_max,
const __u32 *weight, int weight_max,
- u64 choose_args_index)
+ s64 choose_args_index)
{
struct crush_choose_arg_map *arg_map;
int r;
@@ -2313,6 +2320,9 @@ static int do_crush(struct ceph_osdmap *map, int ruleno, int x,
arg_map = lookup_choose_arg_map(&map->crush->choose_args,
choose_args_index);
+ if (!arg_map)
+ arg_map = lookup_choose_arg_map(&map->crush->choose_args,
+ CEPH_DEFAULT_CHOOSE_ARGS);
mutex_lock(&map->crush_workspace_mutex);
r = crush_do_rule(map->crush, ruleno, x, result, result_max,
There is now a fallback to a choose_arg index of -1 if there isn't a pool-specific choose_arg set. If you create a per-pool weight-set, that works for that pool. Otherwise we try the compat/default one. If that doesn't exist either, then we use the normal CRUSH weights. Signed-off-by: Ilya Dryomov <idryomov@gmail.com> --- include/linux/crush/crush.h | 2 +- net/ceph/osdmap.c | 12 +++++++++++- 2 files changed, 12 insertions(+), 2 deletions(-)