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Diffstat (limited to 'include/linux/crush/crush.h')
-rw-r--r--include/linux/crush/crush.h20
1 files changed, 15 insertions, 5 deletions
diff --git a/include/linux/crush/crush.h b/include/linux/crush/crush.h
index 6a1101f24cf..acaa5615d63 100644
--- a/include/linux/crush/crush.h
+++ b/include/linux/crush/crush.h
@@ -19,11 +19,12 @@
#define CRUSH_MAGIC 0x00010000ul /* for detecting algorithm revisions */
-
#define CRUSH_MAX_DEPTH 10 /* max crush hierarchy depth */
-#define CRUSH_MAX_SET 10 /* max size of a mapping result */
+#define CRUSH_ITEM_UNDEF 0x7ffffffe /* undefined result (internal use only) */
+#define CRUSH_ITEM_NONE 0x7fffffff /* no result */
+
/*
* CRUSH uses user-defined "rules" to describe how inputs should be
* mapped to devices. A rule consists of sequence of steps to perform
@@ -43,8 +44,13 @@ enum {
/* arg2 = type */
CRUSH_RULE_CHOOSE_INDEP = 3, /* same */
CRUSH_RULE_EMIT = 4, /* no args */
- CRUSH_RULE_CHOOSE_LEAF_FIRSTN = 6,
- CRUSH_RULE_CHOOSE_LEAF_INDEP = 7,
+ CRUSH_RULE_CHOOSELEAF_FIRSTN = 6,
+ CRUSH_RULE_CHOOSELEAF_INDEP = 7,
+
+ CRUSH_RULE_SET_CHOOSE_TRIES = 8, /* override choose_total_tries */
+ CRUSH_RULE_SET_CHOOSELEAF_TRIES = 9, /* override chooseleaf_descend_once */
+ CRUSH_RULE_SET_CHOOSE_LOCAL_TRIES = 10,
+ CRUSH_RULE_SET_CHOOSE_LOCAL_FALLBACK_TRIES = 11,
};
/*
@@ -162,7 +168,10 @@ struct crush_map {
__u32 choose_local_fallback_tries;
/* choose attempts before giving up */
__u32 choose_total_tries;
- /* attempt chooseleaf inner descent once; on failure retry outer descent */
+ /* attempt chooseleaf inner descent once for firstn mode; on
+ * reject retry outer descent. Note that this does *not*
+ * apply to a collision: in that case we will retry as we used
+ * to. */
__u32 chooseleaf_descend_once;
};
@@ -174,6 +183,7 @@ extern void crush_destroy_bucket_list(struct crush_bucket_list *b);
extern void crush_destroy_bucket_tree(struct crush_bucket_tree *b);
extern void crush_destroy_bucket_straw(struct crush_bucket_straw *b);
extern void crush_destroy_bucket(struct crush_bucket *b);
+extern void crush_destroy_rule(struct crush_rule *r);
extern void crush_destroy(struct crush_map *map);
static inline int crush_calc_tree_node(int i)