0215b91804
New helper for looping over keys in a given subvolume Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_SUBVOLUME_H
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#define _BCACHEFS_SUBVOLUME_H
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#include "darray.h"
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#include "subvolume_types.h"
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enum bch_validate_flags;
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int bch2_check_subvols(struct bch_fs *);
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int bch2_check_subvol_children(struct bch_fs *);
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int bch2_subvolume_validate(struct bch_fs *, struct bkey_s_c, enum bch_validate_flags);
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void bch2_subvolume_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
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int bch2_subvolume_trigger(struct btree_trans *, enum btree_id, unsigned,
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struct bkey_s_c, struct bkey_s,
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enum btree_iter_update_trigger_flags);
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#define bch2_bkey_ops_subvolume ((struct bkey_ops) { \
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.key_validate = bch2_subvolume_validate, \
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.val_to_text = bch2_subvolume_to_text, \
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.trigger = bch2_subvolume_trigger, \
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.min_val_size = 16, \
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})
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int bch2_subvol_has_children(struct btree_trans *, u32);
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int bch2_subvolume_get(struct btree_trans *, unsigned,
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bool, int, struct bch_subvolume *);
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int bch2_subvolume_get_snapshot(struct btree_trans *, u32, u32 *);
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int bch2_subvol_is_ro_trans(struct btree_trans *, u32);
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int bch2_subvol_is_ro(struct bch_fs *, u32);
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static inline struct bkey_s_c
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bch2_btree_iter_peek_in_subvolume_upto_type(struct btree_iter *iter, struct bpos end,
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u32 subvolid, unsigned flags)
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{
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u32 snapshot;
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int ret = bch2_subvolume_get_snapshot(iter->trans, subvolid, &snapshot);
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if (ret)
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return bkey_s_c_err(ret);
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bch2_btree_iter_set_snapshot(iter, snapshot);
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return bch2_btree_iter_peek_upto_type(iter, end, flags);
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}
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#define for_each_btree_key_in_subvolume_upto_continue(_trans, _iter, \
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_end, _subvolid, _flags, _k, _do) \
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({ \
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struct bkey_s_c _k; \
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int _ret3 = 0; \
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\
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do { \
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_ret3 = lockrestart_do(_trans, ({ \
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(_k) = bch2_btree_iter_peek_in_subvolume_upto_type(&(_iter), \
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_end, _subvolid, (_flags)); \
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if (!(_k).k) \
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break; \
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\
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bkey_err(_k) ?: (_do); \
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})); \
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} while (!_ret3 && bch2_btree_iter_advance(&(_iter))); \
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\
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bch2_trans_iter_exit((_trans), &(_iter)); \
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_ret3; \
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})
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#define for_each_btree_key_in_subvolume_upto(_trans, _iter, _btree_id, \
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_start, _end, _subvolid, _flags, _k, _do) \
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({ \
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struct btree_iter _iter; \
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bch2_trans_iter_init((_trans), &(_iter), (_btree_id), \
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(_start), (_flags)); \
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\
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for_each_btree_key_in_subvolume_upto_continue(_trans, _iter, \
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_end, _subvolid, _flags, _k, _do); \
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})
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int bch2_delete_dead_snapshots(struct bch_fs *);
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void bch2_delete_dead_snapshots_async(struct bch_fs *);
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int bch2_subvolume_unlink(struct btree_trans *, u32);
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int bch2_subvolume_create(struct btree_trans *, u64, u32, u32, u32 *, u32 *, bool);
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int bch2_initialize_subvolumes(struct bch_fs *);
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int bch2_fs_upgrade_for_subvolumes(struct bch_fs *);
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int bch2_fs_subvolumes_init(struct bch_fs *);
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#endif /* _BCACHEFS_SUBVOLUME_H */
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