1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_SUBVOLUME_H
3 #define _BCACHEFS_SUBVOLUME_H
6 #include "subvolume_types.h"
8 void bch2_snapshot_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
9 const char *bch2_snapshot_invalid(const struct bch_fs *, struct bkey_s_c);
11 #define bch2_bkey_ops_snapshot (struct bkey_ops) { \
12 .key_invalid = bch2_snapshot_invalid, \
13 .val_to_text = bch2_snapshot_to_text, \
16 int bch2_mark_snapshot(struct btree_trans *, struct bkey_s_c,
17 struct bkey_s_c, unsigned);
19 static inline struct snapshot_t *snapshot_t(struct bch_fs *c, u32 id)
21 return genradix_ptr(&c->snapshots, U32_MAX - id);
24 static inline u32 bch2_snapshot_parent(struct bch_fs *c, u32 id)
26 return snapshot_t(c, id)->parent;
29 static inline u32 bch2_snapshot_internal_node(struct bch_fs *c, u32 id)
31 struct snapshot_t *s = snapshot_t(c, id);
33 return s->children[0] || s->children[1];
36 static inline u32 bch2_snapshot_sibling(struct bch_fs *c, u32 id)
39 u32 parent = bch2_snapshot_parent(c, id);
44 s = snapshot_t(c, bch2_snapshot_parent(c, id));
45 if (id == s->children[0])
46 return s->children[1];
47 if (id == s->children[1])
48 return s->children[0];
52 static inline bool bch2_snapshot_is_ancestor(struct bch_fs *c, u32 id, u32 ancestor)
54 while (id && id < ancestor)
55 id = bch2_snapshot_parent(c, id);
57 return id == ancestor;
60 struct snapshots_seen {
65 static inline void snapshots_seen_exit(struct snapshots_seen *s)
71 static inline void snapshots_seen_init(struct snapshots_seen *s)
73 memset(s, 0, sizeof(*s));
76 static inline int snapshots_seen_add(struct bch_fs *c, struct snapshots_seen *s, u32 id)
78 int ret = darray_push(s->ids, id);
80 bch_err(c, "error reallocating snapshots_seen table (size %zu)",
85 static inline bool snapshot_list_has_id(snapshot_id_list *s, u32 id)
89 darray_for_each(*s, i)
95 int bch2_fs_snapshots_check(struct bch_fs *);
96 void bch2_fs_snapshots_exit(struct bch_fs *);
97 int bch2_fs_snapshots_start(struct bch_fs *);
99 const char *bch2_subvolume_invalid(const struct bch_fs *, struct bkey_s_c);
100 void bch2_subvolume_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
102 #define bch2_bkey_ops_subvolume (struct bkey_ops) { \
103 .key_invalid = bch2_subvolume_invalid, \
104 .val_to_text = bch2_subvolume_to_text, \
107 int bch2_subvolume_get(struct btree_trans *, unsigned,
108 bool, int, struct bch_subvolume *);
109 int bch2_snapshot_get_subvol(struct btree_trans *, u32,
110 struct bch_subvolume *);
111 int bch2_subvolume_get_snapshot(struct btree_trans *, u32, u32 *);
113 /* only exported for tests: */
114 int bch2_snapshot_node_create(struct btree_trans *, u32,
115 u32 *, u32 *, unsigned);
117 int bch2_subvolume_delete(struct btree_trans *, u32);
118 int bch2_subvolume_unlink(struct btree_trans *, u32);
119 int bch2_subvolume_create(struct btree_trans *, u64, u32,
122 int bch2_fs_subvolumes_init(struct bch_fs *);
124 #endif /* _BCACHEFS_SUBVOLUME_H */