1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_DISK_GROUPS_H
3 #define _BCACHEFS_DISK_GROUPS_H
4
5 #include "disk_groups_types.h"
6
7 extern const struct bch_sb_field_ops bch_sb_field_ops_disk_groups;
8
9 static inline unsigned disk_groups_nr(struct bch_sb_field_disk_groups *groups)
10 {
11 return groups
12 ? (vstruct_end(&groups->field) -
13 (void *) &groups->entries[0]) / sizeof(struct bch_disk_group)
14 : 0;
15 }
16
17 struct target {
18 enum {
19 TARGET_NULL,
20 TARGET_DEV,
21 TARGET_GROUP,
22 } type;
23 union {
24 unsigned dev;
25 unsigned group;
26 };
27 };
28
29 #define TARGET_DEV_START 1
30 #define TARGET_GROUP_START (256 + TARGET_DEV_START)
31
32 static inline u16 dev_to_target(unsigned dev)
33 {
34 return TARGET_DEV_START + dev;
35 }
36
37 static inline u16 group_to_target(unsigned group)
38 {
39 return TARGET_GROUP_START + group;
40 }
41
42 static inline struct target target_decode(unsigned target)
43 {
44 if (target >= TARGET_GROUP_START)
45 return (struct target) {
46 .type = TARGET_GROUP,
47 .group = target - TARGET_GROUP_START
48 };
49
50 if (target >= TARGET_DEV_START)
51 return (struct target) {
52 .type = TARGET_DEV,
53 .group = target - TARGET_DEV_START
54 };
55
56 return (struct target) { .type = TARGET_NULL };
57 }
58
59 const struct bch_devs_mask *bch2_target_to_mask(struct bch_fs *, unsigned);
60
61 static inline struct bch_devs_mask target_rw_devs(struct bch_fs *c,
62 enum bch_data_type data_type,
63 u16 target)
64 {
65 struct bch_devs_mask devs = c->rw_devs[data_type];
66 const struct bch_devs_mask *t = bch2_target_to_mask(c, target);
67
68 if (t)
69 bitmap_and(devs.d, devs.d, t->d, BCH_SB_MEMBERS_MAX);
70 return devs;
71 }
72
73 static inline bool bch2_target_accepts_data(struct bch_fs *c,
74 enum bch_data_type data_type,
75 u16 target)
76 {
77 struct bch_devs_mask rw_devs = target_rw_devs(c, data_type, target);
78 return !bitmap_empty(rw_devs.d, BCH_SB_MEMBERS_MAX);
79 }
80
81 bool bch2_dev_in_target(struct bch_fs *, unsigned, unsigned);
82
83 int bch2_disk_path_find(struct bch_sb_handle *, const char *);
84
85 /* Exported for userspace bcachefs-tools: */
86 int bch2_disk_path_find_or_create(struct bch_sb_handle *, const char *);
87
88 void bch2_disk_path_to_text(struct printbuf *, struct bch_fs *, unsigned);
89 void bch2_disk_path_to_text_sb(struct printbuf *, struct bch_sb *, unsigned);
90
91 void bch2_target_to_text(struct printbuf *out, struct bch_fs *, unsigned);
92
93 int bch2_opt_target_parse(struct bch_fs *, const char *, u64 *, struct printbuf *);
94 void bch2_opt_target_to_text(struct printbuf *, struct bch_fs *, struct bch_sb *, u64);
95
96 #define bch2_opt_target (struct bch_opt_fn) { \
97 .parse = bch2_opt_target_parse, \
98 .to_text = bch2_opt_target_to_text, \
99 }
100
101 int bch2_sb_disk_groups_to_cpu(struct bch_fs *);
102
103 int __bch2_dev_group_set(struct bch_fs *, struct bch_dev *, const char *);
104 int bch2_dev_group_set(struct bch_fs *, struct bch_dev *, const char *);
105
106 const char *bch2_sb_validate_disk_groups(struct bch_sb *,
107 struct bch_sb_field *);
108
109 void bch2_disk_groups_to_text(struct printbuf *, struct bch_fs *);
110
111 #endif /* _BCACHEFS_DISK_GROUPS_H */
112
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