1 #ifndef _FS_CEPH_OSDMAP_H
2 #define _FS_CEPH_OSDMAP_H
4 #include <linux/rbtree.h>
5 #include <linux/ceph/types.h>
6 #include <linux/ceph/ceph_fs.h>
7 #include <linux/crush/crush.h>
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
16 * Each map version is identified by an epoch, which increases monotonically.
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.
26 struct ceph_pg_pool_info {
29 struct ceph_pg_pool v;
30 int pg_num_mask, pgp_num_mask, lpg_num_mask, lpgp_num_mask;
34 struct ceph_pg_mapping {
42 struct ceph_fsid fsid;
45 struct ceph_timespec created, modified;
47 u32 flags; /* CEPH_OSDMAP_* */
49 u32 max_osd; /* size of osd_state, _offload, _addr arrays */
50 u8 *osd_state; /* CEPH_OSD_* */
51 u32 *osd_weight; /* 0 = failed, 0x10000 = 100% normal */
52 struct ceph_entity_addr *osd_addr;
54 struct rb_root pg_temp;
55 struct rb_root pg_pools;
58 /* the CRUSH map specifies the mapping of placement groups to
59 * the list of osds that store+replicate them. */
60 struct crush_map *crush;
66 #define ceph_file_layout_su(l) ((__s32)le32_to_cpu((l).fl_stripe_unit))
67 #define ceph_file_layout_stripe_count(l) \
68 ((__s32)le32_to_cpu((l).fl_stripe_count))
69 #define ceph_file_layout_object_size(l) ((__s32)le32_to_cpu((l).fl_object_size))
70 #define ceph_file_layout_cas_hash(l) ((__s32)le32_to_cpu((l).fl_cas_hash))
71 #define ceph_file_layout_object_su(l) \
72 ((__s32)le32_to_cpu((l).fl_object_stripe_unit))
73 #define ceph_file_layout_pg_pool(l) \
74 ((__s32)le32_to_cpu((l).fl_pg_pool))
76 static inline unsigned ceph_file_layout_stripe_width(struct ceph_file_layout *l)
78 return le32_to_cpu(l->fl_stripe_unit) *
79 le32_to_cpu(l->fl_stripe_count);
82 /* "period" == bytes before i start on a new set of objects */
83 static inline unsigned ceph_file_layout_period(struct ceph_file_layout *l)
85 return le32_to_cpu(l->fl_object_size) *
86 le32_to_cpu(l->fl_stripe_count);
90 static inline int ceph_osd_is_up(struct ceph_osdmap *map, int osd)
92 return (osd < map->max_osd) && (map->osd_state[osd] & CEPH_OSD_UP);
95 static inline bool ceph_osdmap_flag(struct ceph_osdmap *map, int flag)
97 return map && (map->flags & flag);
100 extern char *ceph_osdmap_state_str(char *str, int len, int state);
102 static inline struct ceph_entity_addr *ceph_osd_addr(struct ceph_osdmap *map,
105 if (osd >= map->max_osd)
107 return &map->osd_addr[osd];
110 extern struct ceph_osdmap *osdmap_decode(void **p, void *end);
111 extern struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
112 struct ceph_osdmap *map,
113 struct ceph_messenger *msgr);
114 extern void ceph_osdmap_destroy(struct ceph_osdmap *map);
116 /* calculate mapping of a file extent to an object */
117 extern int ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
119 u64 *bno, u64 *oxoff, u64 *oxlen);
121 /* calculate mapping of object to a placement group */
122 extern int ceph_calc_object_layout(struct ceph_object_layout *ol,
124 struct ceph_file_layout *fl,
125 struct ceph_osdmap *osdmap);
126 extern int ceph_calc_pg_acting(struct ceph_osdmap *osdmap,
129 extern int ceph_calc_pg_primary(struct ceph_osdmap *osdmap,
130 struct ceph_pg pgid);
132 extern const char *ceph_pg_pool_name_by_id(struct ceph_osdmap *map, u64 id);
133 extern int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name);