1 #ifndef _FS_CEPH_OSDMAP_H
2 #define _FS_CEPH_OSDMAP_H
4 #include <linux/rbtree.h>
7 #include "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.
21 struct ceph_pg_pool_info {
24 struct ceph_pg_pool v;
25 int pg_num_mask, pgp_num_mask, lpg_num_mask, lpgp_num_mask;
28 struct ceph_pg_mapping {
36 struct ceph_fsid fsid;
39 struct ceph_timespec created, modified;
41 u32 flags; /* CEPH_OSDMAP_* */
43 u32 max_osd; /* size of osd_state, _offload, _addr arrays */
44 u8 *osd_state; /* CEPH_OSD_* */
45 u32 *osd_weight; /* 0 = failed, 0x10000 = 100% normal */
46 struct ceph_entity_addr *osd_addr;
48 struct rb_root pg_temp;
49 struct rb_root pg_pools;
52 /* the CRUSH map specifies the mapping of placement groups to
53 * the list of osds that store+replicate them. */
54 struct crush_map *crush;
60 #define ceph_file_layout_su(l) ((__s32)le32_to_cpu((l).fl_stripe_unit))
61 #define ceph_file_layout_stripe_count(l) \
62 ((__s32)le32_to_cpu((l).fl_stripe_count))
63 #define ceph_file_layout_object_size(l) ((__s32)le32_to_cpu((l).fl_object_size))
64 #define ceph_file_layout_cas_hash(l) ((__s32)le32_to_cpu((l).fl_cas_hash))
65 #define ceph_file_layout_object_su(l) \
66 ((__s32)le32_to_cpu((l).fl_object_stripe_unit))
67 #define ceph_file_layout_pg_preferred(l) \
68 ((__s32)le32_to_cpu((l).fl_pg_preferred))
69 #define ceph_file_layout_pg_pool(l) \
70 ((__s32)le32_to_cpu((l).fl_pg_pool))
72 static inline unsigned ceph_file_layout_stripe_width(struct ceph_file_layout *l)
74 return le32_to_cpu(l->fl_stripe_unit) *
75 le32_to_cpu(l->fl_stripe_count);
78 /* "period" == bytes before i start on a new set of objects */
79 static inline unsigned ceph_file_layout_period(struct ceph_file_layout *l)
81 return le32_to_cpu(l->fl_object_size) *
82 le32_to_cpu(l->fl_stripe_count);
86 static inline int ceph_osd_is_up(struct ceph_osdmap *map, int osd)
88 return (osd < map->max_osd) && (map->osd_state[osd] & CEPH_OSD_UP);
91 static inline bool ceph_osdmap_flag(struct ceph_osdmap *map, int flag)
93 return map && (map->flags & flag);
96 extern char *ceph_osdmap_state_str(char *str, int len, int state);
98 static inline struct ceph_entity_addr *ceph_osd_addr(struct ceph_osdmap *map,
101 if (osd >= map->max_osd)
103 return &map->osd_addr[osd];
106 extern struct ceph_osdmap *osdmap_decode(void **p, void *end);
107 extern struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
108 struct ceph_osdmap *map,
109 struct ceph_messenger *msgr);
110 extern void ceph_osdmap_destroy(struct ceph_osdmap *map);
112 /* calculate mapping of a file extent to an object */
113 extern void ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
115 u64 *bno, u64 *oxoff, u64 *oxlen);
117 /* calculate mapping of object to a placement group */
118 extern int ceph_calc_object_layout(struct ceph_object_layout *ol,
120 struct ceph_file_layout *fl,
121 struct ceph_osdmap *osdmap);
122 extern int ceph_calc_pg_primary(struct ceph_osdmap *osdmap,
123 struct ceph_pg pgid);