crush: sync up with userspace
.. up to ceph.git commit 1db1abc8328d ("crush: eliminate ad hoc diff
between kernel and userspace"). This fixes a bunch of recently pulled
coding style issues and makes includes a bit cleaner.
A patch "crush:Make the function crush_ln static" from Nicholas Krause
<xerofoify@gmail.com> is folded in as crush_ln() has been made static
in userspace as well.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
diff --git a/include/linux/crush/crush.h b/include/linux/crush/crush.h
index 48a1a7d1..48b4930 100644
--- a/include/linux/crush/crush.h
+++ b/include/linux/crush/crush.h
@@ -1,7 +1,11 @@
#ifndef CEPH_CRUSH_CRUSH_H
#define CEPH_CRUSH_CRUSH_H
-#include <linux/types.h>
+#ifdef __KERNEL__
+# include <linux/types.h>
+#else
+# include "crush_compat.h"
+#endif
/*
* CRUSH is a pseudo-random data distribution algorithm that
@@ -20,7 +24,11 @@
#define CRUSH_MAGIC 0x00010000ul /* for detecting algorithm revisions */
#define CRUSH_MAX_DEPTH 10 /* max crush hierarchy depth */
+#define CRUSH_MAX_RULESET (1<<8) /* max crush ruleset number */
+#define CRUSH_MAX_RULES CRUSH_MAX_RULESET /* should be the same as max rulesets */
+#define CRUSH_MAX_DEVICE_WEIGHT (100u * 0x10000u)
+#define CRUSH_MAX_BUCKET_WEIGHT (65535u * 0x10000u)
#define CRUSH_ITEM_UNDEF 0x7ffffffe /* undefined result (internal use only) */
#define CRUSH_ITEM_NONE 0x7fffffff /* no result */
@@ -108,6 +116,15 @@
};
extern const char *crush_bucket_alg_name(int alg);
+/*
+ * although tree was a legacy algorithm, it has been buggy, so
+ * exclude it.
+ */
+#define CRUSH_LEGACY_ALLOWED_BUCKET_ALGS ( \
+ (1 << CRUSH_BUCKET_UNIFORM) | \
+ (1 << CRUSH_BUCKET_LIST) | \
+ (1 << CRUSH_BUCKET_STRAW))
+
struct crush_bucket {
__s32 id; /* this'll be negative */
__u16 type; /* non-zero; type=0 is reserved for devices */
@@ -174,7 +191,7 @@
/* choose local attempts using a fallback permutation before
* re-descent */
__u32 choose_local_fallback_tries;
- /* choose attempts before giving up */
+ /* choose attempts before giving up */
__u32 choose_total_tries;
/* attempt chooseleaf inner descent once for firstn mode; on
* reject retry outer descent. Note that this does *not*
@@ -187,6 +204,25 @@
* that want to limit reshuffling, a value of 3 or 4 will make the
* mappings line up a bit better with previous mappings. */
__u8 chooseleaf_vary_r;
+
+#ifndef __KERNEL__
+ /*
+ * version 0 (original) of straw_calc has various flaws. version 1
+ * fixes a few of them.
+ */
+ __u8 straw_calc_version;
+
+ /*
+ * allowed bucket algs is a bitmask, here the bit positions
+ * are CRUSH_BUCKET_*. note that these are *bits* and
+ * CRUSH_BUCKET_* values are not, so we need to or together (1
+ * << CRUSH_BUCKET_WHATEVER). The 0th bit is not used to
+ * minimize confusion (bucket type values start at 1).
+ */
+ __u32 allowed_bucket_algs;
+
+ __u32 *choose_tries;
+#endif
};
diff --git a/include/linux/crush/hash.h b/include/linux/crush/hash.h
index 91e8842..d1d9025 100644
--- a/include/linux/crush/hash.h
+++ b/include/linux/crush/hash.h
@@ -1,6 +1,12 @@
#ifndef CEPH_CRUSH_HASH_H
#define CEPH_CRUSH_HASH_H
+#ifdef __KERNEL__
+# include <linux/types.h>
+#else
+# include "crush_compat.h"
+#endif
+
#define CRUSH_HASH_RJENKINS1 0
#define CRUSH_HASH_DEFAULT CRUSH_HASH_RJENKINS1
diff --git a/include/linux/crush/mapper.h b/include/linux/crush/mapper.h
index eab3674..5dfd5b1 100644
--- a/include/linux/crush/mapper.h
+++ b/include/linux/crush/mapper.h
@@ -8,7 +8,7 @@
* LGPL2
*/
-#include <linux/crush/crush.h>
+#include "crush.h"
extern int crush_find_rule(const struct crush_map *map, int ruleset, int type, int size);
extern int crush_do_rule(const struct crush_map *map,