mirror of
https://github.com/koverstreet/bcachefs-tools.git
synced 2025-02-09 00:00:04 +03:00
100 lines
2.2 KiB
C
100 lines
2.2 KiB
C
#ifndef _BCACHEFS_DISK_GROUPS_H
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#define _BCACHEFS_DISK_GROUPS_H
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extern const struct bch_sb_field_ops bch_sb_field_ops_disk_groups;
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static inline unsigned disk_groups_nr(struct bch_sb_field_disk_groups *groups)
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{
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return groups
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? (vstruct_end(&groups->field) -
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(void *) &groups->entries[0]) / sizeof(struct bch_disk_group)
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: 0;
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}
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struct target {
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enum {
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TARGET_NULL,
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TARGET_DEV,
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TARGET_GROUP,
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} type;
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union {
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unsigned dev;
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unsigned group;
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};
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};
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#define TARGET_DEV_START 1
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#define TARGET_GROUP_START (256 + TARGET_DEV_START)
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static inline u16 dev_to_target(unsigned dev)
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{
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return TARGET_DEV_START + dev;
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}
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static inline u16 group_to_target(unsigned group)
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{
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return TARGET_GROUP_START + group;
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}
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static inline struct target target_decode(unsigned target)
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{
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if (target >= TARGET_GROUP_START)
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return (struct target) {
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.type = TARGET_GROUP,
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.group = target - TARGET_GROUP_START
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};
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if (target >= TARGET_DEV_START)
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return (struct target) {
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.type = TARGET_DEV,
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.group = target - TARGET_DEV_START
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};
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return (struct target) { .type = TARGET_NULL };
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}
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static inline bool dev_in_target(struct bch_dev *ca, unsigned target)
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{
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struct target t = target_decode(target);
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switch (t.type) {
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case TARGET_NULL:
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return false;
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case TARGET_DEV:
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return ca->dev_idx == t.dev;
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case TARGET_GROUP:
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return ca->mi.group && ca->mi.group - 1 == t.group;
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default:
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BUG();
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}
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}
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static inline bool dev_idx_in_target(struct bch_fs *c, unsigned dev, unsigned target)
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{
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bool ret;
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rcu_read_lock();
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ret = dev_in_target(rcu_dereference(c->devs[dev]), target);
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rcu_read_unlock();
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return ret;
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}
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const struct bch_devs_mask *bch2_target_to_mask(struct bch_fs *, unsigned);
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int bch2_disk_path_find(struct bch_sb_handle *, const char *);
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int bch2_disk_path_find_or_create(struct bch_sb_handle *, const char *);
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int bch2_disk_path_print(struct bch_sb_handle *, char *, size_t, unsigned);
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int bch2_opt_target_parse(struct bch_fs *, const char *, u64 *);
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int bch2_opt_target_print(struct bch_fs *, char *, size_t, u64);
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int bch2_sb_disk_groups_to_cpu(struct bch_fs *);
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int bch2_dev_group_set(struct bch_fs *, struct bch_dev *, const char *);
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const char *bch2_sb_validate_disk_groups(struct bch_sb *,
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struct bch_sb_field *);
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#endif /* _BCACHEFS_DISK_GROUPS_H */
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