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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_SUBVOLUME_H
#define _BCACHEFS_SUBVOLUME_H
#include "darray.h"
#include "subvolume_types.h"
enum bch_validate_flags;
int bch2_check_subvols(struct bch_fs *);
int bch2_check_subvol_children(struct bch_fs *);
int bch2_subvolume_validate(struct bch_fs *, struct bkey_s_c, enum bch_validate_flags);
void bch2_subvolume_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
int bch2_subvolume_trigger(struct btree_trans *, enum btree_id, unsigned,
struct bkey_s_c, struct bkey_s,
enum btree_iter_update_trigger_flags);
#define bch2_bkey_ops_subvolume ((struct bkey_ops) { \
.key_validate = bch2_subvolume_validate, \
.val_to_text = bch2_subvolume_to_text, \
.trigger = bch2_subvolume_trigger, \
.min_val_size = 16, \
})
int bch2_subvol_has_children(struct btree_trans *, u32);
int bch2_subvolume_get(struct btree_trans *, unsigned,
bool, int, struct bch_subvolume *);
int __bch2_subvolume_get_snapshot(struct btree_trans *, u32,
u32 *, bool);
int bch2_subvolume_get_snapshot(struct btree_trans *, u32, u32 *);
int bch2_subvol_is_ro_trans(struct btree_trans *, u32);
int bch2_subvol_is_ro(struct bch_fs *, u32);
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)
{
u32 snapshot;
int ret = bch2_subvolume_get_snapshot(iter->trans, subvolid, &snapshot);
if (ret)
return bkey_s_c_err(ret);
bch2_btree_iter_set_snapshot(iter, snapshot);
return bch2_btree_iter_peek_upto_type(iter, end, flags);
}
#define for_each_btree_key_in_subvolume_upto_continue(_trans, _iter, \
_end, _subvolid, _flags, _k, _do) \
({ \
struct bkey_s_c _k; \
int _ret3 = 0; \
\
do { \
_ret3 = lockrestart_do(_trans, ({ \
(_k) = bch2_btree_iter_peek_in_subvolume_upto_type(&(_iter), \
_end, _subvolid, (_flags)); \
if (!(_k).k) \
break; \
\
bkey_err(_k) ?: (_do); \
})); \
} while (!_ret3 && bch2_btree_iter_advance(&(_iter))); \
\
bch2_trans_iter_exit((_trans), &(_iter)); \
_ret3; \
})
#define for_each_btree_key_in_subvolume_upto(_trans, _iter, _btree_id, \
_start, _end, _subvolid, _flags, _k, _do) \
({ \
struct btree_iter _iter; \
bch2_trans_iter_init((_trans), &(_iter), (_btree_id), \
(_start), (_flags)); \
\
for_each_btree_key_in_subvolume_upto_continue(_trans, _iter, \
_end, _subvolid, _flags, _k, _do); \
})
int bch2_delete_dead_snapshots(struct bch_fs *);
void bch2_delete_dead_snapshots_async(struct bch_fs *);
int bch2_subvolume_unlink(struct btree_trans *, u32);
int bch2_subvolume_create(struct btree_trans *, u64, u32, u32, u32 *, u32 *, bool);
int bch2_initialize_subvolumes(struct bch_fs *);
int bch2_fs_upgrade_for_subvolumes(struct bch_fs *);
int bch2_fs_subvolumes_init(struct bch_fs *);
#endif /* _BCACHEFS_SUBVOLUME_H */
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