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