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 { 22 uint64_t pool; 23 uint32_t seed; 24 }; 25 26 #define CEPH_POOL_FLAG_HASHPSPOOL 1 27 28 struct ceph_pg_pool_info { 29 struct rb_node node; 30 s64 id; 31 u8 type; 32 u8 size; 33 u8 crush_ruleset; 34 u8 object_hash; 35 u32 pg_num, pgp_num; 36 int pg_num_mask, pgp_num_mask; 37 u64 flags; 38 char *name; 39 }; 40 41 struct ceph_object_locator { 42 uint64_t pool; 43 char *key; 44 }; 45 46 struct ceph_pg_mapping { 47 struct rb_node node; 48 struct ceph_pg pgid; 49 int len; 50 int osds[]; 51 }; 52 53 struct ceph_osdmap { 54 struct ceph_fsid fsid; 55 u32 epoch; 56 u32 mkfs_epoch; 57 struct ceph_timespec created, modified; 58 59 u32 flags; /* CEPH_OSDMAP_* */ 60 61 u32 max_osd; /* size of osd_state, _offload, _addr arrays */ 62 u8 *osd_state; /* CEPH_OSD_* */ 63 u32 *osd_weight; /* 0 = failed, 0x10000 = 100% normal */ 64 struct ceph_entity_addr *osd_addr; 65 66 struct rb_root pg_temp; 67 struct rb_root pg_pools; 68 u32 pool_max; 69 70 /* the CRUSH map specifies the mapping of placement groups to 71 * the list of osds that store+replicate them. */ 72 struct crush_map *crush; 73 }; 74 75 /* 76 * file layout helpers 77 */ 78 #define ceph_file_layout_su(l) ((__s32)le32_to_cpu((l).fl_stripe_unit)) 79 #define ceph_file_layout_stripe_count(l) \ 80 ((__s32)le32_to_cpu((l).fl_stripe_count)) 81 #define ceph_file_layout_object_size(l) ((__s32)le32_to_cpu((l).fl_object_size)) 82 #define ceph_file_layout_cas_hash(l) ((__s32)le32_to_cpu((l).fl_cas_hash)) 83 #define ceph_file_layout_object_su(l) \ 84 ((__s32)le32_to_cpu((l).fl_object_stripe_unit)) 85 #define ceph_file_layout_pg_pool(l) \ 86 ((__s32)le32_to_cpu((l).fl_pg_pool)) 87 88 static inline unsigned ceph_file_layout_stripe_width(struct ceph_file_layout *l) 89 { 90 return le32_to_cpu(l->fl_stripe_unit) * 91 le32_to_cpu(l->fl_stripe_count); 92 } 93 94 /* "period" == bytes before i start on a new set of objects */ 95 static inline unsigned ceph_file_layout_period(struct ceph_file_layout *l) 96 { 97 return le32_to_cpu(l->fl_object_size) * 98 le32_to_cpu(l->fl_stripe_count); 99 } 100 101 102 static inline int ceph_osd_is_up(struct ceph_osdmap *map, int osd) 103 { 104 return (osd < map->max_osd) && (map->osd_state[osd] & CEPH_OSD_UP); 105 } 106 107 static inline bool ceph_osdmap_flag(struct ceph_osdmap *map, int flag) 108 { 109 return map && (map->flags & flag); 110 } 111 112 extern char *ceph_osdmap_state_str(char *str, int len, int state); 113 114 static inline struct ceph_entity_addr *ceph_osd_addr(struct ceph_osdmap *map, 115 int osd) 116 { 117 if (osd >= map->max_osd) 118 return NULL; 119 return &map->osd_addr[osd]; 120 } 121 122 extern struct ceph_osdmap *osdmap_decode(void **p, void *end); 123 extern struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end, 124 struct ceph_osdmap *map, 125 struct ceph_messenger *msgr); 126 extern void ceph_osdmap_destroy(struct ceph_osdmap *map); 127 128 /* calculate mapping of a file extent to an object */ 129 extern int ceph_calc_file_object_mapping(struct ceph_file_layout *layout, 130 u64 off, u64 len, 131 u64 *bno, u64 *oxoff, u64 *oxlen); 132 133 /* calculate mapping of object to a placement group */ 134 extern int ceph_calc_object_layout(struct ceph_pg *pg, 135 const char *oid, 136 struct ceph_file_layout *fl, 137 struct ceph_osdmap *osdmap); 138 extern int ceph_calc_pg_acting(struct ceph_osdmap *osdmap, 139 struct ceph_pg pgid, 140 int *acting); 141 extern int ceph_calc_pg_primary(struct ceph_osdmap *osdmap, 142 struct ceph_pg pgid); 143 144 extern const char *ceph_pg_pool_name_by_id(struct ceph_osdmap *map, u64 id); 145 extern int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name); 146 147 #endif 148