131 lines
3.8 KiB
C
131 lines
3.8 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 "types.h"
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#include "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_pool_info {
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struct rb_node node;
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int id;
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struct ceph_pg_pool v;
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int pg_num_mask, pgp_num_mask, lpg_num_mask, lpgp_num_mask;
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char *name;
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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_preferred(l) \
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((__s32)le32_to_cpu((l).fl_pg_preferred))
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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 void ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
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u64 off, u64 *plen,
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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_object_layout(struct ceph_object_layout *ol,
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const char *oid,
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struct ceph_file_layout *fl,
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struct ceph_osdmap *osdmap);
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extern int ceph_calc_pg_acting(struct ceph_osdmap *osdmap, 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 int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name);
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#endif
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