313 lines
8.2 KiB
C
313 lines
8.2 KiB
C
#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/ceph/ceph_fs.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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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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static inline void ceph_oid_init(struct ceph_object_id *oid)
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{
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oid->name = oid->inline_name;
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oid->name_len = 0;
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}
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#define CEPH_OID_INIT_ONSTACK(oid) \
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({ ceph_oid_init(&oid); oid; })
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#define CEPH_DEFINE_OID_ONSTACK(oid) \
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struct ceph_object_id oid = CEPH_OID_INIT_ONSTACK(oid)
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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 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 mutex crush_workspace_mutex;
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void *crush_workspace;
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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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extern struct ceph_osdmap *ceph_osdmap_decode(void **p, void *end);
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struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
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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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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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/* calculate mapping of a file extent to an object */
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extern int ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
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u64 off, u64 len,
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u64 *bno, u64 *oxoff, u64 *oxlen);
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int __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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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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#endif
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