93 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _BCACHEFS_SUBVOLUME_H3#define _BCACHEFS_SUBVOLUME_H4 5#include "darray.h"6#include "subvolume_types.h"7 8enum bch_validate_flags;9 10int bch2_check_subvols(struct bch_fs *);11int bch2_check_subvol_children(struct bch_fs *);12 13int bch2_subvolume_validate(struct bch_fs *, struct bkey_s_c, enum bch_validate_flags);14void bch2_subvolume_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);15int 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 26int bch2_subvol_has_children(struct btree_trans *, u32);27int bch2_subvolume_get(struct btree_trans *, unsigned,28 bool, int, struct bch_subvolume *);29int __bch2_subvolume_get_snapshot(struct btree_trans *, u32,30 u32 *, bool);31int bch2_subvolume_get_snapshot(struct btree_trans *, u32, u32 *);32 33int bch2_subvol_is_ro_trans(struct btree_trans *, u32);34int bch2_subvol_is_ro(struct bch_fs *, u32);35 36static inline struct bkey_s_c37bch2_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 81int bch2_delete_dead_snapshots(struct bch_fs *);82void bch2_delete_dead_snapshots_async(struct bch_fs *);83 84int bch2_subvolume_unlink(struct btree_trans *, u32);85int bch2_subvolume_create(struct btree_trans *, u64, u32, u32, u32 *, u32 *, bool);86 87int bch2_initialize_subvolumes(struct bch_fs *);88int bch2_fs_upgrade_for_subvolumes(struct bch_fs *);89 90int bch2_fs_subvolumes_init(struct bch_fs *);91 92#endif /* _BCACHEFS_SUBVOLUME_H */93