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 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