#ifndef _FS_CEPH_OSDMAP_H #define _FS_CEPH_OSDMAP_H #include <linux/rbtree.h> #include <linux/ceph/types.h> #include <linux/ceph/ceph_fs.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_pool_info { struct rb_node node; int id; struct ceph_pg_pool v; int pg_num_mask, pgp_num_mask, lpg_num_mask, lpgp_num_mask; char *name; }; struct ceph_pg_mapping { struct rb_node node; struct ceph_pg pgid; int len; int osds[]; }; struct ceph_osdmap { struct ceph_fsid fsid; u32 epoch; u32 mkfs_epoch; struct ceph_timespec created, modified; u32 flags; /* CEPH_OSDMAP_* */ u32 max_osd; /* size of osd_state, _offload, _addr arrays */ u8 *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 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; }; /* * file layout helpers */ #define ceph_file_layout_su(l) ((__s32)le32_to_cpu((l).fl_stripe_unit)) #define ceph_file_layout_stripe_count(l) \ ((__s32)le32_to_cpu((l).fl_stripe_count)) #define ceph_file_layout_object_size(l) ((__s32)le32_to_cpu((l).fl_object_size)) #define ceph_file_layout_cas_hash(l) ((__s32)le32_to_cpu((l).fl_cas_hash)) #define ceph_file_layout_object_su(l) \ ((__s32)le32_to_cpu((l).fl_object_stripe_unit)) #define ceph_file_layout_pg_pool(l) \ ((__s32)le32_to_cpu((l).fl_pg_pool)) static inline unsigned ceph_file_layout_stripe_width(struct ceph_file_layout *l) { return le32_to_cpu(l->fl_stripe_unit) * le32_to_cpu(l->fl_stripe_count); } /* "period" == bytes before i start on a new set of objects */ static inline unsigned ceph_file_layout_period(struct ceph_file_layout *l) { return le32_to_cpu(l->fl_object_size) * le32_to_cpu(l->fl_stripe_count); } static inline int ceph_osd_is_up(struct ceph_osdmap *map, int osd) { return (osd < map->max_osd) && (map->osd_state[osd] & CEPH_OSD_UP); } static inline bool ceph_osdmap_flag(struct ceph_osdmap *map, int flag) { return map && (map->flags & flag); } extern char *ceph_osdmap_state_str(char *str, int len, int state); 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]; } extern struct ceph_osdmap *osdmap_decode(void **p, void *end); extern struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end, struct ceph_osdmap *map, struct ceph_messenger *msgr); extern void ceph_osdmap_destroy(struct ceph_osdmap *map); /* calculate mapping of a file extent to an object */ extern void ceph_calc_file_object_mapping(struct ceph_file_layout *layout, u64 off, u64 *plen, u64 *bno, u64 *oxoff, u64 *oxlen); /* calculate mapping of object to a placement group */ extern int ceph_calc_object_layout(struct ceph_object_layout *ol, const char *oid, struct ceph_file_layout *fl, struct ceph_osdmap *osdmap); extern int ceph_calc_pg_acting(struct ceph_osdmap *osdmap, struct ceph_pg pgid, int *acting); extern int ceph_calc_pg_primary(struct ceph_osdmap *osdmap, struct ceph_pg pgid); extern int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name); #endif