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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 DH |
5 | #include <linux/ceph/types.h> |
6 | #include <linux/ceph/ceph_fs.h> | |
3d14c5d2 | 7 | #include <linux/crush/crush.h> |
f24e9980 SW |
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 | */ | |
5b191d99 SW |
21 | struct ceph_pg { |
22 | uint64_t pool; | |
23 | uint32_t seed; | |
24 | }; | |
25 | ||
83ca14fd SW |
26 | #define CEPH_POOL_FLAG_HASHPSPOOL 1 |
27 | ||
f24e9980 | 28 | struct ceph_pg_pool_info { |
4fc51be8 | 29 | struct rb_node node; |
4f6a7e5e SW |
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; | |
2844a76a | 38 | char *name; |
f24e9980 SW |
39 | }; |
40 | ||
4f6a7e5e SW |
41 | struct ceph_object_locator { |
42 | uint64_t pool; | |
43 | char *key; | |
44 | }; | |
45 | ||
f24e9980 SW |
46 | struct ceph_pg_mapping { |
47 | struct rb_node node; | |
5b191d99 | 48 | struct ceph_pg pgid; |
f24e9980 SW |
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; | |
4fc51be8 SW |
67 | struct rb_root pg_pools; |
68 | u32 pool_max; | |
f24e9980 SW |
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)) | |
f24e9980 SW |
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 */ | |
d63b77f4 | 129 | extern int ceph_calc_file_object_mapping(struct ceph_file_layout *layout, |
e8afad65 | 130 | u64 off, u64 len, |
d63b77f4 | 131 | u64 *bno, u64 *oxoff, u64 *oxlen); |
f24e9980 SW |
132 | |
133 | /* calculate mapping of object to a placement group */ | |
2169aea6 | 134 | extern int ceph_calc_object_layout(struct ceph_pg *pg, |
f24e9980 SW |
135 | const char *oid, |
136 | struct ceph_file_layout *fl, | |
137 | struct ceph_osdmap *osdmap); | |
12979354 | 138 | extern int ceph_calc_pg_acting(struct ceph_osdmap *osdmap, |
5b191d99 | 139 | struct ceph_pg pgid, |
d85b7056 | 140 | int *acting); |
51042122 | 141 | extern int ceph_calc_pg_primary(struct ceph_osdmap *osdmap, |
5b191d99 | 142 | struct ceph_pg pgid); |
f24e9980 | 143 | |
72afc71f | 144 | extern const char *ceph_pg_pool_name_by_id(struct ceph_osdmap *map, u64 id); |
7669a2c9 YS |
145 | extern int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name); |
146 | ||
f24e9980 | 147 | #endif |