41766f87f5
The purpose of ceph_calc_object_layout() is to fill in the pool number and seed for a ceph_pg structure provided, based on a given osd map and target object id. Currently that function takes a file layout parameter, but the only thing used out of that is its pool number. Change the function so it takes a pool number rather than the full file layout structure. Only update the ceph_pg if the pool is found in the osd map. Get rid of few useless lines of code from the function while there. Since the function now very clearly just fills in the ceph_pg structure it's provided, rename it ceph_calc_ceph_pg(). Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
146 lines
4.0 KiB
C
146 lines
4.0 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/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_POOL_FLAG_HASHPSPOOL 1
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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;
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u8 size;
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u8 crush_ruleset;
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u8 object_hash;
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u32 pg_num, pgp_num;
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int pg_num_mask, pgp_num_mask;
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u64 flags;
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char *name;
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};
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struct ceph_object_locator {
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uint64_t pool;
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char *key;
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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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int len;
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int osds[];
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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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u32 mkfs_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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u8 *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 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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};
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/*
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* file layout helpers
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*/
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#define ceph_file_layout_su(l) ((__s32)le32_to_cpu((l).fl_stripe_unit))
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#define ceph_file_layout_stripe_count(l) \
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((__s32)le32_to_cpu((l).fl_stripe_count))
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#define ceph_file_layout_object_size(l) ((__s32)le32_to_cpu((l).fl_object_size))
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#define ceph_file_layout_cas_hash(l) ((__s32)le32_to_cpu((l).fl_cas_hash))
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#define ceph_file_layout_object_su(l) \
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((__s32)le32_to_cpu((l).fl_object_stripe_unit))
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#define ceph_file_layout_pg_pool(l) \
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((__s32)le32_to_cpu((l).fl_pg_pool))
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static inline unsigned ceph_file_layout_stripe_width(struct ceph_file_layout *l)
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{
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return le32_to_cpu(l->fl_stripe_unit) *
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le32_to_cpu(l->fl_stripe_count);
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}
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/* "period" == bytes before i start on a new set of objects */
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static inline unsigned ceph_file_layout_period(struct ceph_file_layout *l)
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{
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return le32_to_cpu(l->fl_object_size) *
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le32_to_cpu(l->fl_stripe_count);
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}
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static inline int ceph_osd_is_up(struct ceph_osdmap *map, int osd)
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{
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return (osd < map->max_osd) && (map->osd_state[osd] & CEPH_OSD_UP);
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}
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static inline bool ceph_osdmap_flag(struct ceph_osdmap *map, int flag)
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{
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return map && (map->flags & flag);
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}
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extern char *ceph_osdmap_state_str(char *str, int len, int state);
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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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extern struct ceph_osdmap *osdmap_decode(void **p, void *end);
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extern struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
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struct ceph_osdmap *map,
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struct ceph_messenger *msgr);
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extern void ceph_osdmap_destroy(struct ceph_osdmap *map);
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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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/* calculate mapping of object to a placement group */
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extern int ceph_calc_ceph_pg(struct ceph_pg *pg, const char *oid,
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struct ceph_osdmap *osdmap, uint64_t pool);
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extern int ceph_calc_pg_acting(struct ceph_osdmap *osdmap,
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struct ceph_pg pgid,
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int *acting);
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extern int ceph_calc_pg_primary(struct ceph_osdmap *osdmap,
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struct ceph_pg pgid);
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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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