diff options
Diffstat (limited to 'include/linux/ceph/osdmap.h')
-rw-r--r-- | include/linux/ceph/osdmap.h | 339 |
1 files changed, 339 insertions, 0 deletions
diff --git a/include/linux/ceph/osdmap.h b/include/linux/ceph/osdmap.h new file mode 100644 index 000000000..cad9acfbc --- /dev/null +++ b/include/linux/ceph/osdmap.h @@ -0,0 +1,339 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#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/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_SPG_NOSHARD -1 + +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 */ +#define CEPH_POOL_FLAG_FULL_QUOTA (1ULL << 10) /* pool ran out of quota, + will set FULL too */ +#define CEPH_POOL_FLAG_NEARFULL (1ULL << 11) /* pool is nearfull */ + +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) { + case CEPH_POOL_TYPE_REP: + return true; + case CEPH_POOL_TYPE_EC: + return false; + default: + BUG(); + } +} + +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. + */ +#define CEPH_OID_INLINE_LEN 52 + +/* + * 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 } + +#define CEPH_DEFINE_OID_ONSTACK(oid) \ + 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 workspace_manager { + struct list_head idle_ws; + spinlock_t ws_lock; + /* Number of free workspaces */ + int free_ws; + /* Total number of allocated workspaces */ + atomic_t total_ws; + /* Waiters for a free workspace */ + wait_queue_head_t ws_wait; +}; + +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 workspace_manager crush_wsm; +}; + +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", + (int)version); + 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); + +struct crush_loc { + char *cl_type_name; + char *cl_name; +}; + +struct crush_loc_node { + struct rb_node cl_node; + struct crush_loc cl_loc; /* pointers into cl_data */ + char cl_data[]; +}; + +int ceph_parse_crush_location(char *crush_location, struct rb_root *locs); +int ceph_compare_crush_locs(struct rb_root *locs1, struct rb_root *locs2); +void ceph_clear_crush_locs(struct rb_root *locs); + +int ceph_get_crush_locality(struct ceph_osdmap *osdmap, int id, + struct rb_root *locs); + +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); +u64 ceph_pg_pool_flags(struct ceph_osdmap *map, u64 id); + +#endif |