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f24e9980 SW |
1 | #ifndef _FS_CEPH_OSDMAP_H |
2 | #define _FS_CEPH_OSDMAP_H | |
3 | ||
4 | #include <linux/rbtree.h> | |
a1ce3928 | 5 | #include <linux/ceph/types.h> |
ef4859d6 | 6 | #include <linux/ceph/decode.h> |
a1ce3928 | 7 | #include <linux/ceph/ceph_fs.h> |
3d14c5d2 | 8 | #include <linux/crush/crush.h> |
f24e9980 SW |
9 | |
10 | /* | |
11 | * The osd map describes the current membership of the osd cluster and | |
12 | * specifies the mapping of objects to placement groups and placement | |
13 | * groups to (sets of) osds. That is, it completely specifies the | |
14 | * (desired) distribution of all data objects in the system at some | |
15 | * point in time. | |
16 | * | |
17 | * Each map version is identified by an epoch, which increases monotonically. | |
18 | * | |
19 | * The map can be updated either via an incremental map (diff) describing | |
20 | * the change between two successive epochs, or as a fully encoded map. | |
21 | */ | |
5b191d99 SW |
22 | struct ceph_pg { |
23 | uint64_t pool; | |
24 | uint32_t seed; | |
25 | }; | |
26 | ||
83ca14fd SW |
27 | #define CEPH_POOL_FLAG_HASHPSPOOL 1 |
28 | ||
f24e9980 | 29 | struct ceph_pg_pool_info { |
4fc51be8 | 30 | struct rb_node node; |
4f6a7e5e SW |
31 | s64 id; |
32 | u8 type; | |
33 | u8 size; | |
34 | u8 crush_ruleset; | |
35 | u8 object_hash; | |
36 | u32 pg_num, pgp_num; | |
37 | int pg_num_mask, pgp_num_mask; | |
38 | u64 flags; | |
2844a76a | 39 | char *name; |
f24e9980 SW |
40 | }; |
41 | ||
4f6a7e5e | 42 | struct ceph_object_locator { |
22116525 | 43 | s64 pool; |
4f6a7e5e SW |
44 | }; |
45 | ||
4295f221 ID |
46 | /* |
47 | * Maximum supported by kernel client object name length | |
48 | * | |
49 | * (probably outdated: must be >= RBD_MAX_MD_NAME_LEN -- currently 100) | |
50 | */ | |
51 | #define CEPH_MAX_OID_NAME_LEN 100 | |
52 | ||
53 | struct ceph_object_id { | |
54 | char name[CEPH_MAX_OID_NAME_LEN]; | |
55 | int name_len; | |
56 | }; | |
57 | ||
f24e9980 SW |
58 | struct ceph_pg_mapping { |
59 | struct rb_node node; | |
5b191d99 | 60 | struct ceph_pg pgid; |
f24e9980 SW |
61 | int len; |
62 | int osds[]; | |
63 | }; | |
64 | ||
65 | struct ceph_osdmap { | |
66 | struct ceph_fsid fsid; | |
67 | u32 epoch; | |
68 | u32 mkfs_epoch; | |
69 | struct ceph_timespec created, modified; | |
70 | ||
71 | u32 flags; /* CEPH_OSDMAP_* */ | |
72 | ||
73 | u32 max_osd; /* size of osd_state, _offload, _addr arrays */ | |
74 | u8 *osd_state; /* CEPH_OSD_* */ | |
75 | u32 *osd_weight; /* 0 = failed, 0x10000 = 100% normal */ | |
76 | struct ceph_entity_addr *osd_addr; | |
77 | ||
78 | struct rb_root pg_temp; | |
4fc51be8 SW |
79 | struct rb_root pg_pools; |
80 | u32 pool_max; | |
f24e9980 SW |
81 | |
82 | /* the CRUSH map specifies the mapping of placement groups to | |
83 | * the list of osds that store+replicate them. */ | |
84 | struct crush_map *crush; | |
85 | }; | |
86 | ||
4295f221 ID |
87 | static inline void ceph_oid_set_name(struct ceph_object_id *oid, |
88 | const char *name) | |
89 | { | |
90 | int len; | |
91 | ||
92 | len = strlen(name); | |
93 | if (len > sizeof(oid->name)) { | |
94 | WARN(1, "ceph_oid_set_name '%s' len %d vs %zu, truncating\n", | |
95 | name, len, sizeof(oid->name)); | |
96 | len = sizeof(oid->name); | |
97 | } | |
98 | ||
99 | memcpy(oid->name, name, len); | |
100 | oid->name_len = len; | |
101 | } | |
102 | ||
103 | static inline void ceph_oid_copy(struct ceph_object_id *dest, | |
104 | struct ceph_object_id *src) | |
105 | { | |
106 | BUG_ON(src->name_len > sizeof(dest->name)); | |
107 | memcpy(dest->name, src->name, src->name_len); | |
108 | dest->name_len = src->name_len; | |
109 | } | |
110 | ||
f24e9980 SW |
111 | static inline int ceph_osd_is_up(struct ceph_osdmap *map, int osd) |
112 | { | |
113 | return (osd < map->max_osd) && (map->osd_state[osd] & CEPH_OSD_UP); | |
114 | } | |
115 | ||
116 | static inline bool ceph_osdmap_flag(struct ceph_osdmap *map, int flag) | |
117 | { | |
118 | return map && (map->flags & flag); | |
119 | } | |
120 | ||
121 | extern char *ceph_osdmap_state_str(char *str, int len, int state); | |
122 | ||
123 | static inline struct ceph_entity_addr *ceph_osd_addr(struct ceph_osdmap *map, | |
124 | int osd) | |
125 | { | |
126 | if (osd >= map->max_osd) | |
127 | return NULL; | |
128 | return &map->osd_addr[osd]; | |
129 | } | |
130 | ||
ef4859d6 AE |
131 | static inline int ceph_decode_pgid(void **p, void *end, struct ceph_pg *pgid) |
132 | { | |
133 | __u8 version; | |
134 | ||
135 | if (!ceph_has_room(p, end, 1 + 8 + 4 + 4)) { | |
136 | pr_warning("incomplete pg encoding"); | |
137 | ||
138 | return -EINVAL; | |
139 | } | |
140 | version = ceph_decode_8(p); | |
141 | if (version > 1) { | |
142 | pr_warning("do not understand pg encoding %d > 1", | |
143 | (int)version); | |
144 | return -EINVAL; | |
145 | } | |
146 | ||
147 | pgid->pool = ceph_decode_64(p); | |
148 | pgid->seed = ceph_decode_32(p); | |
149 | *p += 4; /* skip deprecated preferred value */ | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
f24e9980 SW |
154 | extern struct ceph_osdmap *osdmap_decode(void **p, void *end); |
155 | extern struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end, | |
156 | struct ceph_osdmap *map, | |
157 | struct ceph_messenger *msgr); | |
158 | extern void ceph_osdmap_destroy(struct ceph_osdmap *map); | |
159 | ||
160 | /* calculate mapping of a file extent to an object */ | |
d63b77f4 | 161 | extern int ceph_calc_file_object_mapping(struct ceph_file_layout *layout, |
e8afad65 | 162 | u64 off, u64 len, |
d63b77f4 | 163 | u64 *bno, u64 *oxoff, u64 *oxlen); |
f24e9980 SW |
164 | |
165 | /* calculate mapping of object to a placement group */ | |
7c13cb64 ID |
166 | extern int ceph_oloc_oid_to_pg(struct ceph_osdmap *osdmap, |
167 | struct ceph_object_locator *oloc, | |
168 | struct ceph_object_id *oid, | |
169 | struct ceph_pg *pg_out); | |
170 | ||
12979354 | 171 | extern int ceph_calc_pg_acting(struct ceph_osdmap *osdmap, |
5b191d99 | 172 | struct ceph_pg pgid, |
d85b7056 | 173 | int *acting); |
51042122 | 174 | extern int ceph_calc_pg_primary(struct ceph_osdmap *osdmap, |
5b191d99 | 175 | struct ceph_pg pgid); |
f24e9980 | 176 | |
ce7f6a27 ID |
177 | extern struct ceph_pg_pool_info *ceph_pg_pool_by_id(struct ceph_osdmap *map, |
178 | u64 id); | |
179 | ||
72afc71f | 180 | extern const char *ceph_pg_pool_name_by_id(struct ceph_osdmap *map, u64 id); |
7669a2c9 YS |
181 | extern int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name); |
182 | ||
f24e9980 | 183 | #endif |