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Update bcachefs sources to da7fefde29 bcachefs: shim for userspace raid library
[bcachefs-tools-debian] / libbcachefs / disk_groups.h
1 #ifndef _BCACHEFS_DISK_GROUPS_H
2 #define _BCACHEFS_DISK_GROUPS_H
3
4 extern const struct bch_sb_field_ops bch_sb_field_ops_disk_groups;
5
6 static inline unsigned disk_groups_nr(struct bch_sb_field_disk_groups *groups)
7 {
8         return groups
9                 ? (vstruct_end(&groups->field) -
10                    (void *) &groups->entries[0]) / sizeof(struct bch_disk_group)
11                 : 0;
12 }
13
14 struct target {
15         enum {
16                 TARGET_NULL,
17                 TARGET_DEV,
18                 TARGET_GROUP,
19         }                       type;
20         union {
21                 unsigned        dev;
22                 unsigned        group;
23         };
24 };
25
26 #define TARGET_DEV_START        1
27 #define TARGET_GROUP_START      (256 + TARGET_DEV_START)
28
29 static inline u16 dev_to_target(unsigned dev)
30 {
31         return TARGET_DEV_START + dev;
32 }
33
34 static inline u16 group_to_target(unsigned group)
35 {
36         return TARGET_GROUP_START + group;
37 }
38
39 static inline struct target target_decode(unsigned target)
40 {
41         if (target >= TARGET_GROUP_START)
42                 return (struct target) {
43                         .type   = TARGET_GROUP,
44                         .group  = target - TARGET_GROUP_START
45                 };
46
47         if (target >= TARGET_DEV_START)
48                 return (struct target) {
49                         .type   = TARGET_DEV,
50                         .group  = target - TARGET_DEV_START
51                 };
52
53         return (struct target) { .type = TARGET_NULL };
54 }
55
56 const struct bch_devs_mask *bch2_target_to_mask(struct bch_fs *, unsigned);
57
58 static inline struct bch_devs_mask target_rw_devs(struct bch_fs *c,
59                                                   enum bch_data_type data_type,
60                                                   u16 target)
61 {
62         struct bch_devs_mask devs = c->rw_devs[data_type];
63         const struct bch_devs_mask *t = bch2_target_to_mask(c, target);
64
65         if (t)
66                 bitmap_and(devs.d, devs.d, t->d, BCH_SB_MEMBERS_MAX);
67         return devs;
68 }
69
70 bool bch2_dev_in_target(struct bch_fs *, unsigned, unsigned);
71
72 int bch2_disk_path_find(struct bch_sb_handle *, const char *);
73 int bch2_disk_path_find_or_create(struct bch_sb_handle *, const char *);
74 void bch2_disk_path_to_text(struct printbuf *, struct bch_sb_handle *,
75                             unsigned);
76
77 int bch2_opt_target_parse(struct bch_fs *, const char *, u64 *);
78 void bch2_opt_target_to_text(struct printbuf *, struct bch_fs *, u64);
79
80 int bch2_sb_disk_groups_to_cpu(struct bch_fs *);
81
82 int bch2_dev_group_set(struct bch_fs *, struct bch_dev *, const char *);
83
84 const char *bch2_sb_validate_disk_groups(struct bch_sb *,
85                                          struct bch_sb_field *);
86
87 #endif /* _BCACHEFS_DISK_GROUPS_H */