1 #ifndef _FS_CEPH_OSDMAP_H 2 #define _FS_CEPH_OSDMAP_H 3 4 #include <linux/rbtree.h> 5 #include <linux/ceph/types.h> 6 #include <linux/ceph/ceph_fs.h> 7 #include <linux/crush/crush.h> 8 9 /* 10 * The osd map describes the current membership of the osd cluster and 11 * specifies the mapping of objects to placement groups and placement 12 * groups to (sets of) osds. That is, it completely specifies the 13 * (desired) distribution of all data objects in the system at some 14 * point in time. 15 * 16 * Each map version is identified by an epoch, which increases monotonically. 17 * 18 * The map can be updated either via an incremental map (diff) describing 19 * the change between two successive epochs, or as a fully encoded map. 20 */ 21 struct ceph_pg_pool_info { 22 struct rb_node node; 23 int id; 24 struct ceph_pg_pool v; 25 int pg_num_mask, pgp_num_mask, lpg_num_mask, lpgp_num_mask; 26 char *name; 27 }; 28 29 struct ceph_pg_mapping { 30 struct rb_node node; 31 struct ceph_pg pgid; 32 int len; 33 int osds[]; 34 }; 35 36 struct ceph_osdmap { 37 struct ceph_fsid fsid; 38 u32 epoch; 39 u32 mkfs_epoch; 40 struct ceph_timespec created, modified; 41 42 u32 flags; /* CEPH_OSDMAP_* */ 43 44 u32 max_osd; /* size of osd_state, _offload, _addr arrays */ 45 u8 *osd_state; /* CEPH_OSD_* */ 46 u32 *osd_weight; /* 0 = failed, 0x10000 = 100% normal */ 47 struct ceph_entity_addr *osd_addr; 48 49 struct rb_root pg_temp; 50 struct rb_root pg_pools; 51 u32 pool_max; 52 53 /* the CRUSH map specifies the mapping of placement groups to 54 * the list of osds that store+replicate them. */ 55 struct crush_map *crush; 56 }; 57 58 /* 59 * file layout helpers 60 */ 61 #define ceph_file_layout_su(l) ((__s32)le32_to_cpu((l).fl_stripe_unit)) 62 #define ceph_file_layout_stripe_count(l) \ 63 ((__s32)le32_to_cpu((l).fl_stripe_count)) 64 #define ceph_file_layout_object_size(l) ((__s32)le32_to_cpu((l).fl_object_size)) 65 #define ceph_file_layout_cas_hash(l) ((__s32)le32_to_cpu((l).fl_cas_hash)) 66 #define ceph_file_layout_object_su(l) \ 67 ((__s32)le32_to_cpu((l).fl_object_stripe_unit)) 68 #define ceph_file_layout_pg_pool(l) \ 69 ((__s32)le32_to_cpu((l).fl_pg_pool)) 70 71 static inline unsigned ceph_file_layout_stripe_width(struct ceph_file_layout *l) 72 { 73 return le32_to_cpu(l->fl_stripe_unit) * 74 le32_to_cpu(l->fl_stripe_count); 75 } 76 77 /* "period" == bytes before i start on a new set of objects */ 78 static inline unsigned ceph_file_layout_period(struct ceph_file_layout *l) 79 { 80 return le32_to_cpu(l->fl_object_size) * 81 le32_to_cpu(l->fl_stripe_count); 82 } 83 84 85 static inline int ceph_osd_is_up(struct ceph_osdmap *map, int osd) 86 { 87 return (osd < map->max_osd) && (map->osd_state[osd] & CEPH_OSD_UP); 88 } 89 90 static inline bool ceph_osdmap_flag(struct ceph_osdmap *map, int flag) 91 { 92 return map && (map->flags & flag); 93 } 94 95 extern char *ceph_osdmap_state_str(char *str, int len, int state); 96 97 static inline struct ceph_entity_addr *ceph_osd_addr(struct ceph_osdmap *map, 98 int osd) 99 { 100 if (osd >= map->max_osd) 101 return NULL; 102 return &map->osd_addr[osd]; 103 } 104 105 extern struct ceph_osdmap *osdmap_decode(void **p, void *end); 106 extern struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end, 107 struct ceph_osdmap *map, 108 struct ceph_messenger *msgr); 109 extern void ceph_osdmap_destroy(struct ceph_osdmap *map); 110 111 /* calculate mapping of a file extent to an object */ 112 extern int ceph_calc_file_object_mapping(struct ceph_file_layout *layout, 113 u64 off, u64 *plen, 114 u64 *bno, u64 *oxoff, u64 *oxlen); 115 116 /* calculate mapping of object to a placement group */ 117 extern int ceph_calc_object_layout(struct ceph_object_layout *ol, 118 const char *oid, 119 struct ceph_file_layout *fl, 120 struct ceph_osdmap *osdmap); 121 extern int ceph_calc_pg_acting(struct ceph_osdmap *osdmap, struct ceph_pg pgid, 122 int *acting); 123 extern int ceph_calc_pg_primary(struct ceph_osdmap *osdmap, 124 struct ceph_pg pgid); 125 126 extern const char *ceph_pg_pool_name_by_id(struct ceph_osdmap *map, u64 id); 127 extern int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name); 128 129 #endif 130