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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 SW |
42 | struct ceph_object_locator { |
43 | uint64_t pool; | |
44 | char *key; | |
45 | }; | |
46 | ||
f24e9980 SW |
47 | struct ceph_pg_mapping { |
48 | struct rb_node node; | |
5b191d99 | 49 | struct ceph_pg pgid; |
f24e9980 SW |
50 | int len; |
51 | int osds[]; | |
52 | }; | |
53 | ||
54 | struct ceph_osdmap { | |
55 | struct ceph_fsid fsid; | |
56 | u32 epoch; | |
57 | u32 mkfs_epoch; | |
58 | struct ceph_timespec created, modified; | |
59 | ||
60 | u32 flags; /* CEPH_OSDMAP_* */ | |
61 | ||
62 | u32 max_osd; /* size of osd_state, _offload, _addr arrays */ | |
63 | u8 *osd_state; /* CEPH_OSD_* */ | |
64 | u32 *osd_weight; /* 0 = failed, 0x10000 = 100% normal */ | |
65 | struct ceph_entity_addr *osd_addr; | |
66 | ||
67 | struct rb_root pg_temp; | |
4fc51be8 SW |
68 | struct rb_root pg_pools; |
69 | u32 pool_max; | |
f24e9980 SW |
70 | |
71 | /* the CRUSH map specifies the mapping of placement groups to | |
72 | * the list of osds that store+replicate them. */ | |
73 | struct crush_map *crush; | |
74 | }; | |
75 | ||
76 | /* | |
77 | * file layout helpers | |
78 | */ | |
79 | #define ceph_file_layout_su(l) ((__s32)le32_to_cpu((l).fl_stripe_unit)) | |
80 | #define ceph_file_layout_stripe_count(l) \ | |
81 | ((__s32)le32_to_cpu((l).fl_stripe_count)) | |
82 | #define ceph_file_layout_object_size(l) ((__s32)le32_to_cpu((l).fl_object_size)) | |
83 | #define ceph_file_layout_cas_hash(l) ((__s32)le32_to_cpu((l).fl_cas_hash)) | |
84 | #define ceph_file_layout_object_su(l) \ | |
85 | ((__s32)le32_to_cpu((l).fl_object_stripe_unit)) | |
f24e9980 SW |
86 | #define ceph_file_layout_pg_pool(l) \ |
87 | ((__s32)le32_to_cpu((l).fl_pg_pool)) | |
88 | ||
89 | static inline unsigned ceph_file_layout_stripe_width(struct ceph_file_layout *l) | |
90 | { | |
91 | return le32_to_cpu(l->fl_stripe_unit) * | |
92 | le32_to_cpu(l->fl_stripe_count); | |
93 | } | |
94 | ||
95 | /* "period" == bytes before i start on a new set of objects */ | |
96 | static inline unsigned ceph_file_layout_period(struct ceph_file_layout *l) | |
97 | { | |
98 | return le32_to_cpu(l->fl_object_size) * | |
99 | le32_to_cpu(l->fl_stripe_count); | |
100 | } | |
101 | ||
102 | ||
103 | static inline int ceph_osd_is_up(struct ceph_osdmap *map, int osd) | |
104 | { | |
105 | return (osd < map->max_osd) && (map->osd_state[osd] & CEPH_OSD_UP); | |
106 | } | |
107 | ||
108 | static inline bool ceph_osdmap_flag(struct ceph_osdmap *map, int flag) | |
109 | { | |
110 | return map && (map->flags & flag); | |
111 | } | |
112 | ||
113 | extern char *ceph_osdmap_state_str(char *str, int len, int state); | |
114 | ||
115 | static inline struct ceph_entity_addr *ceph_osd_addr(struct ceph_osdmap *map, | |
116 | int osd) | |
117 | { | |
118 | if (osd >= map->max_osd) | |
119 | return NULL; | |
120 | return &map->osd_addr[osd]; | |
121 | } | |
122 | ||
ef4859d6 AE |
123 | static inline int ceph_decode_pgid(void **p, void *end, struct ceph_pg *pgid) |
124 | { | |
125 | __u8 version; | |
126 | ||
127 | if (!ceph_has_room(p, end, 1 + 8 + 4 + 4)) { | |
128 | pr_warning("incomplete pg encoding"); | |
129 | ||
130 | return -EINVAL; | |
131 | } | |
132 | version = ceph_decode_8(p); | |
133 | if (version > 1) { | |
134 | pr_warning("do not understand pg encoding %d > 1", | |
135 | (int)version); | |
136 | return -EINVAL; | |
137 | } | |
138 | ||
139 | pgid->pool = ceph_decode_64(p); | |
140 | pgid->seed = ceph_decode_32(p); | |
141 | *p += 4; /* skip deprecated preferred value */ | |
142 | ||
143 | return 0; | |
144 | } | |
145 | ||
f24e9980 SW |
146 | extern struct ceph_osdmap *osdmap_decode(void **p, void *end); |
147 | extern struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end, | |
148 | struct ceph_osdmap *map, | |
149 | struct ceph_messenger *msgr); | |
150 | extern void ceph_osdmap_destroy(struct ceph_osdmap *map); | |
151 | ||
152 | /* calculate mapping of a file extent to an object */ | |
d63b77f4 | 153 | extern int ceph_calc_file_object_mapping(struct ceph_file_layout *layout, |
e8afad65 | 154 | u64 off, u64 len, |
d63b77f4 | 155 | u64 *bno, u64 *oxoff, u64 *oxlen); |
f24e9980 SW |
156 | |
157 | /* calculate mapping of object to a placement group */ | |
41766f87 AE |
158 | extern int ceph_calc_ceph_pg(struct ceph_pg *pg, const char *oid, |
159 | struct ceph_osdmap *osdmap, uint64_t pool); | |
12979354 | 160 | extern int ceph_calc_pg_acting(struct ceph_osdmap *osdmap, |
5b191d99 | 161 | struct ceph_pg pgid, |
d85b7056 | 162 | int *acting); |
51042122 | 163 | extern int ceph_calc_pg_primary(struct ceph_osdmap *osdmap, |
5b191d99 | 164 | struct ceph_pg pgid); |
f24e9980 | 165 | |
72afc71f | 166 | extern const char *ceph_pg_pool_name_by_id(struct ceph_osdmap *map, u64 id); |
7669a2c9 YS |
167 | extern int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name); |
168 | ||
f24e9980 | 169 | #endif |