[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / ceph / osdmap.h

#ifndef _FS_CEPH_OSDMAP_H
#define _FS_CEPH_OSDMAP_H

#include <linux/rbtree.h>
#include <linux/ceph/types.h>
#include <linux/ceph/decode.h>
#include <linux/ceph/ceph_fs.h>
#include <linux/crush/crush.h>

/*
 * The osd map describes the current membership of the osd cluster and
 * specifies the mapping of objects to placement groups and placement
 * groups to (sets of) osds.  That is, it completely specifies the
 * (desired) distribution of all data objects in the system at some
 * point in time.
 *
 * Each map version is identified by an epoch, which increases monotonically.
 *
 * The map can be updated either via an incremental map (diff) describing
 * the change between two successive epochs, or as a fully encoded map.
 */
struct ceph_pg {
	uint64_t pool;
	uint32_t seed;
};

#define CEPH_POOL_FLAG_HASHPSPOOL  1

struct ceph_pg_pool_info {
	struct rb_node node;
	s64 id;
	u8 type;
	u8 size;
	u8 crush_ruleset;
	u8 object_hash;
	u32 pg_num, pgp_num;
	int pg_num_mask, pgp_num_mask;
	u64 flags;
	char *name;
};

struct ceph_object_locator {
	uint64_t pool;
	char *key;
};

struct ceph_pg_mapping {
	struct rb_node node;
	struct ceph_pg pgid;
	int len;
	int osds[];
};

struct ceph_osdmap {
	struct ceph_fsid fsid;
	u32 epoch;
	u32 mkfs_epoch;
	struct ceph_timespec created, modified;

	u32 flags;         /* CEPH_OSDMAP_* */

	u32 max_osd;       /* size of osd_state, _offload, _addr arrays */
	u8 *osd_state;     /* CEPH_OSD_* */
	u32 *osd_weight;   /* 0 = failed, 0x10000 = 100% normal */
	struct ceph_entity_addr *osd_addr;

	struct rb_root pg_temp;
	struct rb_root pg_pools;
	u32 pool_max;

	/* the CRUSH map specifies the mapping of placement groups to
	 * the list of osds that store+replicate them. */
	struct crush_map *crush;
};

/*
 * file layout helpers
 */
#define ceph_file_layout_su(l) ((__s32)le32_to_cpu((l).fl_stripe_unit))
#define ceph_file_layout_stripe_count(l) \
	((__s32)le32_to_cpu((l).fl_stripe_count))
#define ceph_file_layout_object_size(l) ((__s32)le32_to_cpu((l).fl_object_size))
#define ceph_file_layout_cas_hash(l) ((__s32)le32_to_cpu((l).fl_cas_hash))
#define ceph_file_layout_object_su(l) \
	((__s32)le32_to_cpu((l).fl_object_stripe_unit))
#define ceph_file_layout_pg_pool(l) \
	((__s32)le32_to_cpu((l).fl_pg_pool))

static inline unsigned ceph_file_layout_stripe_width(struct ceph_file_layout *l)
{
	return le32_to_cpu(l->fl_stripe_unit) *
		le32_to_cpu(l->fl_stripe_count);
}

/* "period" == bytes before i start on a new set of objects */
static inline unsigned ceph_file_layout_period(struct ceph_file_layout *l)
{
	return le32_to_cpu(l->fl_object_size) *
		le32_to_cpu(l->fl_stripe_count);
}


static inline int ceph_osd_is_up(struct ceph_osdmap *map, int osd)
{
	return (osd < map->max_osd) && (map->osd_state[osd] & CEPH_OSD_UP);
}

static inline bool ceph_osdmap_flag(struct ceph_osdmap *map, int flag)
{
	return map && (map->flags & flag);
}

extern char *ceph_osdmap_state_str(char *str, int len, int state);

static inline struct ceph_entity_addr *ceph_osd_addr(struct ceph_osdmap *map,
						     int osd)
{
	if (osd >= map->max_osd)
		return NULL;
	return &map->osd_addr[osd];
}

static inline int ceph_decode_pgid(void **p, void *end, struct ceph_pg *pgid)
{
	__u8 version;

	if (!ceph_has_room(p, end, 1 + 8 + 4 + 4)) {
		pr_warning("incomplete pg encoding");

		return -EINVAL;
	}
	version = ceph_decode_8(p);
	if (version > 1) {
		pr_warning("do not understand pg encoding %d > 1",
			(int)version);
		return -EINVAL;
	}

	pgid->pool = ceph_decode_64(p);
	pgid->seed = ceph_decode_32(p);
	*p += 4;	/* skip deprecated preferred value */

	return 0;
}

extern struct ceph_osdmap *osdmap_decode(void **p, void *end);
extern struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
					    struct ceph_osdmap *map,
					    struct ceph_messenger *msgr);
extern void ceph_osdmap_destroy(struct ceph_osdmap *map);

/* calculate mapping of a file extent to an object */
extern int ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
					 u64 off, u64 len,
					 u64 *bno, u64 *oxoff, u64 *oxlen);

/* calculate mapping of object to a placement group */
extern int ceph_calc_ceph_pg(struct ceph_pg *pg, const char *oid,
			  struct ceph_osdmap *osdmap, uint64_t pool);
extern int ceph_calc_pg_acting(struct ceph_osdmap *osdmap,
			       struct ceph_pg pgid,
			       int *acting);
extern int ceph_calc_pg_primary(struct ceph_osdmap *osdmap,
				struct ceph_pg pgid);

extern const char *ceph_pg_pool_name_by_id(struct ceph_osdmap *map, u64 id);
extern int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name);

#endif
Commit	Line	Data
f24e9980 SW	1	#ifndef _FS_CEPH_OSDMAP_H
	2	#define _FS_CEPH_OSDMAP_H
	3
	4	#include <linux/rbtree.h>
a1ce3928	5	#include <linux/ceph/types.h>
ef4859d6	6	#include <linux/ceph/decode.h>
a1ce3928	7	#include <linux/ceph/ceph_fs.h>
3d14c5d2	8	#include <linux/crush/crush.h>
f24e9980 SW	9
	10	/*
	11	* The osd map describes the current membership of the osd cluster and
	12	* specifies the mapping of objects to placement groups and placement
	13	* groups to (sets of) osds. That is, it completely specifies the
	14	* (desired) distribution of all data objects in the system at some
	15	* point in time.
	16	*
	17	* Each map version is identified by an epoch, which increases monotonically.
	18	*
	19	* The map can be updated either via an incremental map (diff) describing
	20	* the change between two successive epochs, or as a fully encoded map.
	21	*/
5b191d99 SW	22	struct ceph_pg {
	23	uint64_t pool;
	24	uint32_t seed;
	25	};
	26
83ca14fd SW	27	#define CEPH_POOL_FLAG_HASHPSPOOL 1
83ca14fd SW	28
f24e9980	29	struct ceph_pg_pool_info {
4fc51be8	30	struct rb_node node;
4f6a7e5e SW	31	s64 id;
	32	u8 type;
	33	u8 size;
	34	u8 crush_ruleset;
	35	u8 object_hash;
	36	u32 pg_num, pgp_num;
	37	int pg_num_mask, pgp_num_mask;
	38	u64 flags;
2844a76a	39	char *name;
f24e9980 SW	40	};
f24e9980 SW	41
4f6a7e5e SW	42	struct ceph_object_locator {
	43	uint64_t pool;
	44	char *key;
	45	};
	46
f24e9980 SW	47	struct ceph_pg_mapping {
f24e9980 SW	48	struct rb_node node;
5b191d99	49	struct ceph_pg pgid;
f24e9980 SW	50	int len;
	51	int osds[];
	52	};
	53
	54	struct ceph_osdmap {
	55	struct ceph_fsid fsid;
	56	u32 epoch;
	57	u32 mkfs_epoch;
	58	struct ceph_timespec created, modified;
	59
	60	u32 flags; /* CEPH_OSDMAP_* */
	61
	62	u32 max_osd; /* size of osd_state, _offload, _addr arrays */
	63	u8 osd_state; / CEPH_OSD_* */
	64	u32 osd_weight; / 0 = failed, 0x10000 = 100% normal */
	65	struct ceph_entity_addr *osd_addr;
	66
	67	struct rb_root pg_temp;
4fc51be8 SW	68	struct rb_root pg_pools;
4fc51be8 SW	69	u32 pool_max;
f24e9980 SW	70
	71	/* the CRUSH map specifies the mapping of placement groups to
	72	* the list of osds that store+replicate them. */
	73	struct crush_map *crush;
	74	};
	75
	76	/*
	77	* file layout helpers
	78	*/
	79	#define ceph_file_layout_su(l) ((__s32)le32_to_cpu((l).fl_stripe_unit))
	80	#define ceph_file_layout_stripe_count(l) \
	81	((__s32)le32_to_cpu((l).fl_stripe_count))
	82	#define ceph_file_layout_object_size(l) ((__s32)le32_to_cpu((l).fl_object_size))
	83	#define ceph_file_layout_cas_hash(l) ((__s32)le32_to_cpu((l).fl_cas_hash))
	84	#define ceph_file_layout_object_su(l) \
	85	((__s32)le32_to_cpu((l).fl_object_stripe_unit))
f24e9980 SW	86	#define ceph_file_layout_pg_pool(l) \
	87	((__s32)le32_to_cpu((l).fl_pg_pool))
	88
	89	static inline unsigned ceph_file_layout_stripe_width(struct ceph_file_layout *l)
	90	{
	91	return le32_to_cpu(l->fl_stripe_unit) *
	92	le32_to_cpu(l->fl_stripe_count);
	93	}
	94
	95	/* "period" == bytes before i start on a new set of objects */
	96	static inline unsigned ceph_file_layout_period(struct ceph_file_layout *l)
	97	{
	98	return le32_to_cpu(l->fl_object_size) *
	99	le32_to_cpu(l->fl_stripe_count);
	100	}
	101
	102
	103	static inline int ceph_osd_is_up(struct ceph_osdmap *map, int osd)
	104	{
	105	return (osd < map->max_osd) && (map->osd_state[osd] & CEPH_OSD_UP);
	106	}
	107
	108	static inline bool ceph_osdmap_flag(struct ceph_osdmap *map, int flag)
	109	{
	110	return map && (map->flags & flag);
	111	}
	112
	113	extern char ceph_osdmap_state_str(char str, int len, int state);
	114
	115	static inline struct ceph_entity_addr ceph_osd_addr(struct ceph_osdmap map,
	116	int osd)
	117	{
	118	if (osd >= map->max_osd)
	119	return NULL;
	120	return &map->osd_addr[osd];
	121	}
	122
ef4859d6 AE	123	static inline int ceph_decode_pgid(void *p, void end, struct ceph_pg *pgid)
	124	{
	125	__u8 version;
	126
	127	if (!ceph_has_room(p, end, 1 + 8 + 4 + 4)) {
	128	pr_warning("incomplete pg encoding");
	129
	130	return -EINVAL;
	131	}
	132	version = ceph_decode_8(p);
	133	if (version > 1) {
	134	pr_warning("do not understand pg encoding %d > 1",
	135	(int)version);
	136	return -EINVAL;
	137	}
	138
	139	pgid->pool = ceph_decode_64(p);
	140	pgid->seed = ceph_decode_32(p);
	141	p += 4; / skip deprecated preferred value */
	142
	143	return 0;
	144	}
	145
f24e9980 SW	146	extern struct ceph_osdmap osdmap_decode(void p, void end);
	147	extern struct ceph_osdmap osdmap_apply_incremental(void p, void end,
	148	struct ceph_osdmap *map,
	149	struct ceph_messenger *msgr);
	150	extern void ceph_osdmap_destroy(struct ceph_osdmap *map);
	151
	152	/* calculate mapping of a file extent to an object */
d63b77f4	153	extern int ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
e8afad65	154	u64 off, u64 len,
d63b77f4	155	u64 bno, u64 oxoff, u64 *oxlen);
f24e9980 SW	156
f24e9980 SW	157	/* calculate mapping of object to a placement group */
41766f87 AE	158	extern int ceph_calc_ceph_pg(struct ceph_pg pg, const char oid,
41766f87 AE	159	struct ceph_osdmap *osdmap, uint64_t pool);
12979354	160	extern int ceph_calc_pg_acting(struct ceph_osdmap *osdmap,
5b191d99	161	struct ceph_pg pgid,
d85b7056	162	int *acting);
51042122	163	extern int ceph_calc_pg_primary(struct ceph_osdmap *osdmap,
5b191d99	164	struct ceph_pg pgid);
f24e9980	165
72afc71f	166	extern const char ceph_pg_pool_name_by_id(struct ceph_osdmap map, u64 id);
7669a2c9 YS	167	extern int ceph_pg_poolid_by_name(struct ceph_osdmap map, const char name);
7669a2c9 YS	168
f24e9980	169	#endif