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339 lines
9.1 KiB
339 lines
9.1 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _FS_CEPH_OSDMAP_H |
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#define _FS_CEPH_OSDMAP_H |
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#include <linux/rbtree.h> |
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#include <linux/ceph/types.h> |
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#include <linux/ceph/decode.h> |
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#include <linux/crush/crush.h> |
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/* |
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* The osd map describes the current membership of the osd cluster and |
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* specifies the mapping of objects to placement groups and placement |
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* groups to (sets of) osds. That is, it completely specifies the |
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* (desired) distribution of all data objects in the system at some |
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* point in time. |
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* |
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* Each map version is identified by an epoch, which increases monotonically. |
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* |
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* The map can be updated either via an incremental map (diff) describing |
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* the change between two successive epochs, or as a fully encoded map. |
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*/ |
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struct ceph_pg { |
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uint64_t pool; |
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uint32_t seed; |
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}; |
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#define CEPH_SPG_NOSHARD -1 |
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struct ceph_spg { |
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struct ceph_pg pgid; |
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s8 shard; |
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}; |
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int ceph_pg_compare(const struct ceph_pg *lhs, const struct ceph_pg *rhs); |
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int ceph_spg_compare(const struct ceph_spg *lhs, const struct ceph_spg *rhs); |
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#define CEPH_POOL_FLAG_HASHPSPOOL (1ULL << 0) /* hash pg seed and pool id |
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together */ |
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#define CEPH_POOL_FLAG_FULL (1ULL << 1) /* pool is full */ |
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#define CEPH_POOL_FLAG_FULL_QUOTA (1ULL << 10) /* pool ran out of quota, |
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will set FULL too */ |
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#define CEPH_POOL_FLAG_NEARFULL (1ULL << 11) /* pool is nearfull */ |
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struct ceph_pg_pool_info { |
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struct rb_node node; |
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s64 id; |
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u8 type; /* CEPH_POOL_TYPE_* */ |
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u8 size; |
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u8 min_size; |
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u8 crush_ruleset; |
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u8 object_hash; |
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u32 last_force_request_resend; |
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u32 pg_num, pgp_num; |
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int pg_num_mask, pgp_num_mask; |
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s64 read_tier; |
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s64 write_tier; /* wins for read+write ops */ |
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u64 flags; /* CEPH_POOL_FLAG_* */ |
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char *name; |
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bool was_full; /* for handle_one_map() */ |
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}; |
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static inline bool ceph_can_shift_osds(struct ceph_pg_pool_info *pool) |
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{ |
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switch (pool->type) { |
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case CEPH_POOL_TYPE_REP: |
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return true; |
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case CEPH_POOL_TYPE_EC: |
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return false; |
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default: |
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BUG(); |
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} |
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} |
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struct ceph_object_locator { |
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s64 pool; |
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struct ceph_string *pool_ns; |
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}; |
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static inline void ceph_oloc_init(struct ceph_object_locator *oloc) |
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{ |
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oloc->pool = -1; |
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oloc->pool_ns = NULL; |
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} |
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static inline bool ceph_oloc_empty(const struct ceph_object_locator *oloc) |
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{ |
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return oloc->pool == -1; |
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} |
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void ceph_oloc_copy(struct ceph_object_locator *dest, |
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const struct ceph_object_locator *src); |
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void ceph_oloc_destroy(struct ceph_object_locator *oloc); |
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/* |
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* 51-char inline_name is long enough for all cephfs and all but one |
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* rbd requests: <imgname> in "<imgname>.rbd"/"rbd_id.<imgname>" can be |
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* arbitrarily long (~PAGE_SIZE). It's done once during rbd map; all |
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* other rbd requests fit into inline_name. |
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* |
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* Makes ceph_object_id 64 bytes on 64-bit. |
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*/ |
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#define CEPH_OID_INLINE_LEN 52 |
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/* |
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* Both inline and external buffers have space for a NUL-terminator, |
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* which is carried around. It's not required though - RADOS object |
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* names don't have to be NUL-terminated and may contain NULs. |
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*/ |
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struct ceph_object_id { |
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char *name; |
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char inline_name[CEPH_OID_INLINE_LEN]; |
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int name_len; |
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}; |
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#define __CEPH_OID_INITIALIZER(oid) { .name = (oid).inline_name } |
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#define CEPH_DEFINE_OID_ONSTACK(oid) \ |
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struct ceph_object_id oid = __CEPH_OID_INITIALIZER(oid) |
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static inline void ceph_oid_init(struct ceph_object_id *oid) |
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{ |
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*oid = (struct ceph_object_id) __CEPH_OID_INITIALIZER(*oid); |
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} |
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static inline bool ceph_oid_empty(const struct ceph_object_id *oid) |
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{ |
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return oid->name == oid->inline_name && !oid->name_len; |
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} |
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void ceph_oid_copy(struct ceph_object_id *dest, |
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const struct ceph_object_id *src); |
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__printf(2, 3) |
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void ceph_oid_printf(struct ceph_object_id *oid, const char *fmt, ...); |
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__printf(3, 4) |
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int ceph_oid_aprintf(struct ceph_object_id *oid, gfp_t gfp, |
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const char *fmt, ...); |
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void ceph_oid_destroy(struct ceph_object_id *oid); |
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struct workspace_manager { |
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struct list_head idle_ws; |
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spinlock_t ws_lock; |
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/* Number of free workspaces */ |
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int free_ws; |
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/* Total number of allocated workspaces */ |
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atomic_t total_ws; |
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/* Waiters for a free workspace */ |
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wait_queue_head_t ws_wait; |
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}; |
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struct ceph_pg_mapping { |
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struct rb_node node; |
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struct ceph_pg pgid; |
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union { |
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struct { |
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int len; |
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int osds[]; |
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} pg_temp, pg_upmap; |
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struct { |
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int osd; |
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} primary_temp; |
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struct { |
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int len; |
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int from_to[][2]; |
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} pg_upmap_items; |
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}; |
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}; |
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struct ceph_osdmap { |
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struct ceph_fsid fsid; |
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u32 epoch; |
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struct ceph_timespec created, modified; |
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u32 flags; /* CEPH_OSDMAP_* */ |
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u32 max_osd; /* size of osd_state, _offload, _addr arrays */ |
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u32 *osd_state; /* CEPH_OSD_* */ |
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u32 *osd_weight; /* 0 = failed, 0x10000 = 100% normal */ |
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struct ceph_entity_addr *osd_addr; |
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struct rb_root pg_temp; |
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struct rb_root primary_temp; |
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/* remap (post-CRUSH, pre-up) */ |
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struct rb_root pg_upmap; /* PG := raw set */ |
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struct rb_root pg_upmap_items; /* from -> to within raw set */ |
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u32 *osd_primary_affinity; |
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struct rb_root pg_pools; |
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u32 pool_max; |
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/* the CRUSH map specifies the mapping of placement groups to |
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* the list of osds that store+replicate them. */ |
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struct crush_map *crush; |
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struct workspace_manager crush_wsm; |
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}; |
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static inline bool ceph_osd_exists(struct ceph_osdmap *map, int osd) |
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{ |
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return osd >= 0 && osd < map->max_osd && |
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(map->osd_state[osd] & CEPH_OSD_EXISTS); |
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} |
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static inline bool ceph_osd_is_up(struct ceph_osdmap *map, int osd) |
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{ |
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return ceph_osd_exists(map, osd) && |
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(map->osd_state[osd] & CEPH_OSD_UP); |
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} |
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static inline bool ceph_osd_is_down(struct ceph_osdmap *map, int osd) |
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{ |
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return !ceph_osd_is_up(map, osd); |
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} |
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char *ceph_osdmap_state_str(char *str, int len, u32 state); |
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extern u32 ceph_get_primary_affinity(struct ceph_osdmap *map, int osd); |
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static inline struct ceph_entity_addr *ceph_osd_addr(struct ceph_osdmap *map, |
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int osd) |
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{ |
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if (osd >= map->max_osd) |
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return NULL; |
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return &map->osd_addr[osd]; |
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} |
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#define CEPH_PGID_ENCODING_LEN (1 + 8 + 4 + 4) |
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static inline int ceph_decode_pgid(void **p, void *end, struct ceph_pg *pgid) |
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{ |
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__u8 version; |
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if (!ceph_has_room(p, end, CEPH_PGID_ENCODING_LEN)) { |
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pr_warn("incomplete pg encoding\n"); |
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return -EINVAL; |
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} |
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version = ceph_decode_8(p); |
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if (version > 1) { |
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pr_warn("do not understand pg encoding %d > 1\n", |
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(int)version); |
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return -EINVAL; |
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} |
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pgid->pool = ceph_decode_64(p); |
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pgid->seed = ceph_decode_32(p); |
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*p += 4; /* skip deprecated preferred value */ |
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return 0; |
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} |
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struct ceph_osdmap *ceph_osdmap_alloc(void); |
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struct ceph_osdmap *ceph_osdmap_decode(void **p, void *end, bool msgr2); |
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struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end, bool msgr2, |
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struct ceph_osdmap *map); |
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extern void ceph_osdmap_destroy(struct ceph_osdmap *map); |
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struct ceph_osds { |
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int osds[CEPH_PG_MAX_SIZE]; |
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int size; |
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int primary; /* id, NOT index */ |
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}; |
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static inline void ceph_osds_init(struct ceph_osds *set) |
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{ |
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set->size = 0; |
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set->primary = -1; |
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} |
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void ceph_osds_copy(struct ceph_osds *dest, const struct ceph_osds *src); |
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bool ceph_pg_is_split(const struct ceph_pg *pgid, u32 old_pg_num, |
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u32 new_pg_num); |
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bool ceph_is_new_interval(const struct ceph_osds *old_acting, |
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const struct ceph_osds *new_acting, |
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const struct ceph_osds *old_up, |
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const struct ceph_osds *new_up, |
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int old_size, |
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int new_size, |
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int old_min_size, |
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int new_min_size, |
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u32 old_pg_num, |
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u32 new_pg_num, |
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bool old_sort_bitwise, |
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bool new_sort_bitwise, |
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bool old_recovery_deletes, |
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bool new_recovery_deletes, |
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const struct ceph_pg *pgid); |
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bool ceph_osds_changed(const struct ceph_osds *old_acting, |
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const struct ceph_osds *new_acting, |
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bool any_change); |
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void __ceph_object_locator_to_pg(struct ceph_pg_pool_info *pi, |
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const struct ceph_object_id *oid, |
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const struct ceph_object_locator *oloc, |
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struct ceph_pg *raw_pgid); |
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int ceph_object_locator_to_pg(struct ceph_osdmap *osdmap, |
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const struct ceph_object_id *oid, |
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const struct ceph_object_locator *oloc, |
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struct ceph_pg *raw_pgid); |
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void ceph_pg_to_up_acting_osds(struct ceph_osdmap *osdmap, |
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struct ceph_pg_pool_info *pi, |
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const struct ceph_pg *raw_pgid, |
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struct ceph_osds *up, |
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struct ceph_osds *acting); |
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bool ceph_pg_to_primary_shard(struct ceph_osdmap *osdmap, |
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struct ceph_pg_pool_info *pi, |
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const struct ceph_pg *raw_pgid, |
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struct ceph_spg *spgid); |
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int ceph_pg_to_acting_primary(struct ceph_osdmap *osdmap, |
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const struct ceph_pg *raw_pgid); |
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struct crush_loc { |
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char *cl_type_name; |
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char *cl_name; |
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}; |
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struct crush_loc_node { |
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struct rb_node cl_node; |
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struct crush_loc cl_loc; /* pointers into cl_data */ |
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char cl_data[]; |
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}; |
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int ceph_parse_crush_location(char *crush_location, struct rb_root *locs); |
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int ceph_compare_crush_locs(struct rb_root *locs1, struct rb_root *locs2); |
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void ceph_clear_crush_locs(struct rb_root *locs); |
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int ceph_get_crush_locality(struct ceph_osdmap *osdmap, int id, |
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struct rb_root *locs); |
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extern struct ceph_pg_pool_info *ceph_pg_pool_by_id(struct ceph_osdmap *map, |
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u64 id); |
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extern const char *ceph_pg_pool_name_by_id(struct ceph_osdmap *map, u64 id); |
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extern int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name); |
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u64 ceph_pg_pool_flags(struct ceph_osdmap *map, u64 id); |
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#endif
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