1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_SUBVOLUME_H
3 #define _BCACHEFS_SUBVOLUME_H
4
5 #include "darray.h"
6 #include "subvolume_types.h"
7
8 enum bch_validate_flags;
9
10 int bch2_check_subvols(struct bch_fs *);
11 int bch2_check_subvol_children(struct bch_fs *);
12
13 int bch2_subvolume_validate(struct bch_fs *, struct bkey_s_c, enum bch_validate_flags);
14 void bch2_subvolume_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
15 int bch2_subvolume_trigger(struct btree_trans *, enum btree_id, unsigned,
16 struct bkey_s_c, struct bkey_s,
17 enum btree_iter_update_trigger_flags);
18
19 #define bch2_bkey_ops_subvolume ((struct bkey_ops) { \
20 .key_validate = bch2_subvolume_validate, \
21 .val_to_text = bch2_subvolume_to_text, \
22 .trigger = bch2_subvolume_trigger, \
23 .min_val_size = 16, \
24 })
25
26 int bch2_subvol_has_children(struct btree_trans *, u32);
27 int bch2_subvolume_get(struct btree_trans *, unsigned,
28 bool, int, struct bch_subvolume *);
29 int __bch2_subvolume_get_snapshot(struct btree_trans *, u32,
30 u32 *, bool);
31 int bch2_subvolume_get_snapshot(struct btree_trans *, u32, u32 *);
32
33 int bch2_subvol_is_ro_trans(struct btree_trans *, u32);
34 int bch2_subvol_is_ro(struct bch_fs *, u32);
35
36 static inline struct bkey_s_c
bch2_btree_iter_peek_in_subvolume_upto_type(struct btree_iter * iter,struct bpos end,u32 subvolid,unsigned flags)37 bch2_btree_iter_peek_in_subvolume_upto_type(struct btree_iter *iter, struct bpos end,
38 u32 subvolid, unsigned flags)
39 {
40 u32 snapshot;
41 int ret = bch2_subvolume_get_snapshot(iter->trans, subvolid, &snapshot);
42 if (ret)
43 return bkey_s_c_err(ret);
44
45 bch2_btree_iter_set_snapshot(iter, snapshot);
46 return bch2_btree_iter_peek_upto_type(iter, end, flags);
47 }
48
49 #define for_each_btree_key_in_subvolume_upto_continue(_trans, _iter, \
50 _end, _subvolid, _flags, _k, _do) \
51 ({ \
52 struct bkey_s_c _k; \
53 int _ret3 = 0; \
54 \
55 do { \
56 _ret3 = lockrestart_do(_trans, ({ \
57 (_k) = bch2_btree_iter_peek_in_subvolume_upto_type(&(_iter), \
58 _end, _subvolid, (_flags)); \
59 if (!(_k).k) \
60 break; \
61 \
62 bkey_err(_k) ?: (_do); \
63 })); \
64 } while (!_ret3 && bch2_btree_iter_advance(&(_iter))); \
65 \
66 bch2_trans_iter_exit((_trans), &(_iter)); \
67 _ret3; \
68 })
69
70 #define for_each_btree_key_in_subvolume_upto(_trans, _iter, _btree_id, \
71 _start, _end, _subvolid, _flags, _k, _do) \
72 ({ \
73 struct btree_iter _iter; \
74 bch2_trans_iter_init((_trans), &(_iter), (_btree_id), \
75 (_start), (_flags)); \
76 \
77 for_each_btree_key_in_subvolume_upto_continue(_trans, _iter, \
78 _end, _subvolid, _flags, _k, _do); \
79 })
80
81 int bch2_delete_dead_snapshots(struct bch_fs *);
82 void bch2_delete_dead_snapshots_async(struct bch_fs *);
83
84 int bch2_subvolume_unlink(struct btree_trans *, u32);
85 int bch2_subvolume_create(struct btree_trans *, u64, u32, u32, u32 *, u32 *, bool);
86
87 int bch2_initialize_subvolumes(struct bch_fs *);
88 int bch2_fs_upgrade_for_subvolumes(struct bch_fs *);
89
90 int bch2_fs_subvolumes_init(struct bch_fs *);
91
92 #endif /* _BCACHEFS_SUBVOLUME_H */
93