blob: e081b56f1c1dacf60a850cbafface5e8e481f7e3 [file] [log] [blame]
/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/rbtree.h>
#include <linux/ceph/types.h>
#include <linux/ceph/decode.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;
struct ceph_spg {
struct ceph_pg pgid;
s8 shard;
int ceph_pg_compare(const struct ceph_pg *lhs, const struct ceph_pg *rhs);
int ceph_spg_compare(const struct ceph_spg *lhs, const struct ceph_spg *rhs);
#define CEPH_POOL_FLAG_HASHPSPOOL (1ULL << 0) /* hash pg seed and pool id
together */
#define CEPH_POOL_FLAG_FULL (1ULL << 1) /* pool is full */
struct ceph_pg_pool_info {
struct rb_node node;
s64 id;
u8 type; /* CEPH_POOL_TYPE_* */
u8 size;
u8 min_size;
u8 crush_ruleset;
u8 object_hash;
u32 last_force_request_resend;
u32 pg_num, pgp_num;
int pg_num_mask, pgp_num_mask;
s64 read_tier;
s64 write_tier; /* wins for read+write ops */
u64 flags; /* CEPH_POOL_FLAG_* */
char *name;
bool was_full; /* for handle_one_map() */
static inline bool ceph_can_shift_osds(struct ceph_pg_pool_info *pool)
switch (pool->type) {
return true;
return false;
struct ceph_object_locator {
s64 pool;
struct ceph_string *pool_ns;
static inline void ceph_oloc_init(struct ceph_object_locator *oloc)
oloc->pool = -1;
oloc->pool_ns = NULL;
static inline bool ceph_oloc_empty(const struct ceph_object_locator *oloc)
return oloc->pool == -1;
void ceph_oloc_copy(struct ceph_object_locator *dest,
const struct ceph_object_locator *src);
void ceph_oloc_destroy(struct ceph_object_locator *oloc);
* 51-char inline_name is long enough for all cephfs and all but one
* rbd requests: <imgname> in "<imgname>.rbd"/"rbd_id.<imgname>" can be
* arbitrarily long (~PAGE_SIZE). It's done once during rbd map; all
* other rbd requests fit into inline_name.
* Makes ceph_object_id 64 bytes on 64-bit.
* Both inline and external buffers have space for a NUL-terminator,
* which is carried around. It's not required though - RADOS object
* names don't have to be NUL-terminated and may contain NULs.
struct ceph_object_id {
char *name;
char inline_name[CEPH_OID_INLINE_LEN];
int name_len;
#define __CEPH_OID_INITIALIZER(oid) { .name = (oid).inline_name }
struct ceph_object_id oid = __CEPH_OID_INITIALIZER(oid)
static inline void ceph_oid_init(struct ceph_object_id *oid)
*oid = (struct ceph_object_id) __CEPH_OID_INITIALIZER(*oid);
static inline bool ceph_oid_empty(const struct ceph_object_id *oid)
return oid->name == oid->inline_name && !oid->name_len;
void ceph_oid_copy(struct ceph_object_id *dest,
const struct ceph_object_id *src);
__printf(2, 3)
void ceph_oid_printf(struct ceph_object_id *oid, const char *fmt, ...);
__printf(3, 4)
int ceph_oid_aprintf(struct ceph_object_id *oid, gfp_t gfp,
const char *fmt, ...);
void ceph_oid_destroy(struct ceph_object_id *oid);
struct ceph_pg_mapping {
struct rb_node node;
struct ceph_pg pgid;
union {
struct {
int len;
int osds[];
} pg_temp, pg_upmap;
struct {
int osd;
} primary_temp;
struct {
int len;
int from_to[][2];
} pg_upmap_items;
struct ceph_osdmap {
struct ceph_fsid fsid;
u32 epoch;
struct ceph_timespec created, modified;
u32 flags; /* CEPH_OSDMAP_* */
u32 max_osd; /* size of osd_state, _offload, _addr arrays */
u32 *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 primary_temp;
/* remap (post-CRUSH, pre-up) */
struct rb_root pg_upmap; /* PG := raw set */
struct rb_root pg_upmap_items; /* from -> to within raw set */
u32 *osd_primary_affinity;
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;
struct mutex crush_workspace_mutex;
void *crush_workspace;
static inline bool ceph_osd_exists(struct ceph_osdmap *map, int osd)
return osd >= 0 && osd < map->max_osd &&
(map->osd_state[osd] & CEPH_OSD_EXISTS);
static inline bool ceph_osd_is_up(struct ceph_osdmap *map, int osd)
return ceph_osd_exists(map, osd) &&
(map->osd_state[osd] & CEPH_OSD_UP);
static inline bool ceph_osd_is_down(struct ceph_osdmap *map, int osd)
return !ceph_osd_is_up(map, osd);
char *ceph_osdmap_state_str(char *str, int len, u32 state);
extern u32 ceph_get_primary_affinity(struct ceph_osdmap *map, int osd);
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];
#define CEPH_PGID_ENCODING_LEN (1 + 8 + 4 + 4)
static inline int ceph_decode_pgid(void **p, void *end, struct ceph_pg *pgid)
__u8 version;
if (!ceph_has_room(p, end, CEPH_PGID_ENCODING_LEN)) {
pr_warn("incomplete pg encoding\n");
return -EINVAL;
version = ceph_decode_8(p);
if (version > 1) {
pr_warn("do not understand pg encoding %d > 1\n",
return -EINVAL;
pgid->pool = ceph_decode_64(p);
pgid->seed = ceph_decode_32(p);
*p += 4; /* skip deprecated preferred value */
return 0;
struct ceph_osdmap *ceph_osdmap_alloc(void);
extern struct ceph_osdmap *ceph_osdmap_decode(void **p, void *end);
struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
struct ceph_osdmap *map);
extern void ceph_osdmap_destroy(struct ceph_osdmap *map);
struct ceph_osds {
int osds[CEPH_PG_MAX_SIZE];
int size;
int primary; /* id, NOT index */
static inline void ceph_osds_init(struct ceph_osds *set)
set->size = 0;
set->primary = -1;
void ceph_osds_copy(struct ceph_osds *dest, const struct ceph_osds *src);
bool ceph_pg_is_split(const struct ceph_pg *pgid, u32 old_pg_num,
u32 new_pg_num);
bool ceph_is_new_interval(const struct ceph_osds *old_acting,
const struct ceph_osds *new_acting,
const struct ceph_osds *old_up,
const struct ceph_osds *new_up,
int old_size,
int new_size,
int old_min_size,
int new_min_size,
u32 old_pg_num,
u32 new_pg_num,
bool old_sort_bitwise,
bool new_sort_bitwise,
bool old_recovery_deletes,
bool new_recovery_deletes,
const struct ceph_pg *pgid);
bool ceph_osds_changed(const struct ceph_osds *old_acting,
const struct ceph_osds *new_acting,
bool any_change);
void __ceph_object_locator_to_pg(struct ceph_pg_pool_info *pi,
const struct ceph_object_id *oid,
const struct ceph_object_locator *oloc,
struct ceph_pg *raw_pgid);
int ceph_object_locator_to_pg(struct ceph_osdmap *osdmap,
const struct ceph_object_id *oid,
const struct ceph_object_locator *oloc,
struct ceph_pg *raw_pgid);
void ceph_pg_to_up_acting_osds(struct ceph_osdmap *osdmap,
struct ceph_pg_pool_info *pi,
const struct ceph_pg *raw_pgid,
struct ceph_osds *up,
struct ceph_osds *acting);
bool ceph_pg_to_primary_shard(struct ceph_osdmap *osdmap,
struct ceph_pg_pool_info *pi,
const struct ceph_pg *raw_pgid,
struct ceph_spg *spgid);
int ceph_pg_to_acting_primary(struct ceph_osdmap *osdmap,
const struct ceph_pg *raw_pgid);
extern struct ceph_pg_pool_info *ceph_pg_pool_by_id(struct ceph_osdmap *map,
u64 id);
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);