1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_BTREE_UPDATE_H
3 #define _BCACHEFS_BTREE_UPDATE_H
5 #include "btree_iter.h"
11 void bch2_btree_node_prep_for_write(struct btree_trans *,
12 struct btree_path *, struct btree *);
13 bool bch2_btree_bset_insert_key(struct btree_trans *, struct btree_path *,
14 struct btree *, struct btree_node_iter *,
17 int bch2_btree_node_flush0(struct journal *, struct journal_entry_pin *, u64);
18 int bch2_btree_node_flush1(struct journal *, struct journal_entry_pin *, u64);
19 void bch2_btree_add_journal_pin(struct bch_fs *, struct btree *, u64);
21 void bch2_btree_insert_key_leaf(struct btree_trans *, struct btree_path *,
22 struct bkey_i *, u64);
24 #define BCH_TRANS_COMMIT_FLAGS() \
25 x(no_enospc, "don't check for enospc") \
26 x(no_check_rw, "don't attempt to take a ref on c->writes") \
27 x(lazy_rw, "go read-write if we haven't yet - only for use in recovery") \
28 x(no_journal_res, "don't take a journal reservation, instead " \
29 "pin journal entry referred to by trans->journal_res.seq") \
30 x(journal_reclaim, "operation required for journal reclaim; may return error" \
31 "instead of deadlocking if BCH_WATERMARK_reclaim not specified")\
33 enum __bch_trans_commit_flags {
34 /* First bits for bch_watermark: */
35 __BCH_TRANS_COMMIT_FLAGS_START = BCH_WATERMARK_BITS,
36 #define x(n, ...) __BCH_TRANS_COMMIT_##n,
37 BCH_TRANS_COMMIT_FLAGS()
41 enum bch_trans_commit_flags {
42 #define x(n, ...) BCH_TRANS_COMMIT_##n = BIT(__BCH_TRANS_COMMIT_##n),
43 BCH_TRANS_COMMIT_FLAGS()
47 int bch2_btree_delete_extent_at(struct btree_trans *, struct btree_iter *,
49 int bch2_btree_delete_at(struct btree_trans *, struct btree_iter *, unsigned);
50 int bch2_btree_delete(struct btree_trans *, enum btree_id, struct bpos, unsigned);
52 int bch2_btree_insert_nonextent(struct btree_trans *, enum btree_id,
53 struct bkey_i *, enum btree_update_flags);
55 int bch2_btree_insert_trans(struct btree_trans *, enum btree_id, struct bkey_i *,
56 enum btree_update_flags);
57 int bch2_btree_insert(struct bch_fs *, enum btree_id, struct bkey_i *,
58 struct disk_reservation *, int flags);
60 int bch2_btree_delete_range_trans(struct btree_trans *, enum btree_id,
61 struct bpos, struct bpos, unsigned, u64 *);
62 int bch2_btree_delete_range(struct bch_fs *, enum btree_id,
63 struct bpos, struct bpos, unsigned, u64 *);
65 int bch2_btree_bit_mod(struct btree_trans *, enum btree_id, struct bpos, bool);
67 static inline int bch2_btree_delete_at_buffered(struct btree_trans *trans,
68 enum btree_id btree, struct bpos pos)
70 return bch2_btree_bit_mod(trans, btree, pos, false);
73 int __bch2_insert_snapshot_whiteouts(struct btree_trans *, enum btree_id,
74 struct bpos, struct bpos);
77 * For use when splitting extents in existing snapshots:
79 * If @old_pos is an interior snapshot node, iterate over descendent snapshot
80 * nodes: for every descendent snapshot in whiche @old_pos is overwritten and
81 * not visible, emit a whiteout at @new_pos.
83 static inline int bch2_insert_snapshot_whiteouts(struct btree_trans *trans,
88 if (!btree_type_has_snapshots(btree) ||
89 bkey_eq(old_pos, new_pos))
92 return __bch2_insert_snapshot_whiteouts(trans, btree, old_pos, new_pos);
95 int bch2_trans_update_extent_overwrite(struct btree_trans *, struct btree_iter *,
96 enum btree_update_flags,
97 struct bkey_s_c, struct bkey_s_c);
99 int bch2_bkey_get_empty_slot(struct btree_trans *, struct btree_iter *,
100 enum btree_id, struct bpos);
102 int __must_check bch2_trans_update(struct btree_trans *, struct btree_iter *,
103 struct bkey_i *, enum btree_update_flags);
104 int __must_check bch2_trans_update_seq(struct btree_trans *, u64, struct btree_iter *,
105 struct bkey_i *, enum btree_update_flags);
106 int __must_check bch2_trans_update_buffered(struct btree_trans *,
107 enum btree_id, struct bkey_i *);
109 void bch2_trans_commit_hook(struct btree_trans *,
110 struct btree_trans_commit_hook *);
111 int __bch2_trans_commit(struct btree_trans *, unsigned);
113 __printf(2, 3) int bch2_fs_log_msg(struct bch_fs *, const char *, ...);
114 __printf(2, 3) int bch2_journal_log_msg(struct bch_fs *, const char *, ...);
117 * bch2_trans_commit - insert keys at given iterator positions
119 * This is main entry point for btree updates.
122 * -EROFS: filesystem read only
123 * -EIO: journal or btree node IO error
125 static inline int bch2_trans_commit(struct btree_trans *trans,
126 struct disk_reservation *disk_res,
130 trans->disk_res = disk_res;
131 trans->journal_seq = journal_seq;
133 return __bch2_trans_commit(trans, flags);
136 #define commit_do(_trans, _disk_res, _journal_seq, _flags, _do) \
137 lockrestart_do(_trans, _do ?: bch2_trans_commit(_trans, (_disk_res),\
138 (_journal_seq), (_flags)))
140 #define nested_commit_do(_trans, _disk_res, _journal_seq, _flags, _do) \
141 nested_lockrestart_do(_trans, _do ?: bch2_trans_commit(_trans, (_disk_res),\
142 (_journal_seq), (_flags)))
144 #define bch2_trans_run(_c, _do) \
146 struct btree_trans *trans = bch2_trans_get(_c); \
148 bch2_trans_put(trans); \
152 #define bch2_trans_do(_c, _disk_res, _journal_seq, _flags, _do) \
153 bch2_trans_run(_c, commit_do(trans, _disk_res, _journal_seq, _flags, _do))
155 #define trans_for_each_update(_trans, _i) \
156 for ((_i) = (_trans)->updates; \
157 (_i) < (_trans)->updates + (_trans)->nr_updates; \
160 #define trans_for_each_wb_update(_trans, _i) \
161 for ((_i) = (_trans)->wb_updates; \
162 (_i) < (_trans)->wb_updates + (_trans)->nr_wb_updates; \
165 static inline void bch2_trans_reset_updates(struct btree_trans *trans)
167 struct btree_insert_entry *i;
169 trans_for_each_update(trans, i)
170 bch2_path_put(trans, i->path, true);
172 trans->extra_journal_res = 0;
173 trans->nr_updates = 0;
174 trans->nr_wb_updates = 0;
175 trans->wb_updates = NULL;
177 trans->extra_journal_entries.nr = 0;
179 if (trans->fs_usage_deltas) {
180 trans->fs_usage_deltas->used = 0;
181 memset((void *) trans->fs_usage_deltas +
182 offsetof(struct replicas_delta_list, memset_start), 0,
183 (void *) &trans->fs_usage_deltas->memset_end -
184 (void *) &trans->fs_usage_deltas->memset_start);
188 static inline struct bkey_i *__bch2_bkey_make_mut_noupdate(struct btree_trans *trans, struct bkey_s_c k,
189 unsigned type, unsigned min_bytes)
191 unsigned bytes = max_t(unsigned, min_bytes, bkey_bytes(k.k));
194 if (type && k.k->type != type)
195 return ERR_PTR(-ENOENT);
197 mut = bch2_trans_kmalloc_nomemzero(trans, bytes);
199 bkey_reassemble(mut, k);
201 if (unlikely(bytes > bkey_bytes(k.k))) {
202 memset((void *) mut + bkey_bytes(k.k), 0,
203 bytes - bkey_bytes(k.k));
204 mut->k.u64s = DIV_ROUND_UP(bytes, sizeof(u64));
210 static inline struct bkey_i *bch2_bkey_make_mut_noupdate(struct btree_trans *trans, struct bkey_s_c k)
212 return __bch2_bkey_make_mut_noupdate(trans, k, 0, 0);
215 #define bch2_bkey_make_mut_noupdate_typed(_trans, _k, _type) \
216 bkey_i_to_##_type(__bch2_bkey_make_mut_noupdate(_trans, _k, \
217 KEY_TYPE_##_type, sizeof(struct bkey_i_##_type)))
219 static inline struct bkey_i *__bch2_bkey_make_mut(struct btree_trans *trans, struct btree_iter *iter,
220 struct bkey_s_c *k, unsigned flags,
221 unsigned type, unsigned min_bytes)
223 struct bkey_i *mut = __bch2_bkey_make_mut_noupdate(trans, *k, type, min_bytes);
229 ret = bch2_trans_update(trans, iter, mut, flags);
233 *k = bkey_i_to_s_c(mut);
237 static inline struct bkey_i *bch2_bkey_make_mut(struct btree_trans *trans, struct btree_iter *iter,
238 struct bkey_s_c *k, unsigned flags)
240 return __bch2_bkey_make_mut(trans, iter, k, flags, 0, 0);
243 #define bch2_bkey_make_mut_typed(_trans, _iter, _k, _flags, _type) \
244 bkey_i_to_##_type(__bch2_bkey_make_mut(_trans, _iter, _k, _flags,\
245 KEY_TYPE_##_type, sizeof(struct bkey_i_##_type)))
247 static inline struct bkey_i *__bch2_bkey_get_mut_noupdate(struct btree_trans *trans,
248 struct btree_iter *iter,
249 unsigned btree_id, struct bpos pos,
250 unsigned flags, unsigned type, unsigned min_bytes)
252 struct bkey_s_c k = __bch2_bkey_get_iter(trans, iter,
253 btree_id, pos, flags|BTREE_ITER_INTENT, type);
254 struct bkey_i *ret = IS_ERR(k.k)
256 : __bch2_bkey_make_mut_noupdate(trans, k, 0, min_bytes);
258 bch2_trans_iter_exit(trans, iter);
262 static inline struct bkey_i *bch2_bkey_get_mut_noupdate(struct btree_trans *trans,
263 struct btree_iter *iter,
264 unsigned btree_id, struct bpos pos,
267 return __bch2_bkey_get_mut_noupdate(trans, iter, btree_id, pos, flags, 0, 0);
270 static inline struct bkey_i *__bch2_bkey_get_mut(struct btree_trans *trans,
271 struct btree_iter *iter,
272 unsigned btree_id, struct bpos pos,
273 unsigned flags, unsigned type, unsigned min_bytes)
275 struct bkey_i *mut = __bch2_bkey_get_mut_noupdate(trans, iter,
276 btree_id, pos, flags|BTREE_ITER_INTENT, type, min_bytes);
282 ret = bch2_trans_update(trans, iter, mut, flags);
284 bch2_trans_iter_exit(trans, iter);
291 static inline struct bkey_i *bch2_bkey_get_mut_minsize(struct btree_trans *trans,
292 struct btree_iter *iter,
293 unsigned btree_id, struct bpos pos,
294 unsigned flags, unsigned min_bytes)
296 return __bch2_bkey_get_mut(trans, iter, btree_id, pos, flags, 0, min_bytes);
299 static inline struct bkey_i *bch2_bkey_get_mut(struct btree_trans *trans,
300 struct btree_iter *iter,
301 unsigned btree_id, struct bpos pos,
304 return __bch2_bkey_get_mut(trans, iter, btree_id, pos, flags, 0, 0);
307 #define bch2_bkey_get_mut_typed(_trans, _iter, _btree_id, _pos, _flags, _type)\
308 bkey_i_to_##_type(__bch2_bkey_get_mut(_trans, _iter, \
309 _btree_id, _pos, _flags, \
310 KEY_TYPE_##_type, sizeof(struct bkey_i_##_type)))
312 static inline struct bkey_i *__bch2_bkey_alloc(struct btree_trans *trans, struct btree_iter *iter,
313 unsigned flags, unsigned type, unsigned val_size)
315 struct bkey_i *k = bch2_trans_kmalloc(trans, sizeof(*k) + val_size);
324 set_bkey_val_bytes(&k->k, val_size);
326 ret = bch2_trans_update(trans, iter, k, flags);
332 #define bch2_bkey_alloc(_trans, _iter, _flags, _type) \
333 bkey_i_to_##_type(__bch2_bkey_alloc(_trans, _iter, _flags, \
334 KEY_TYPE_##_type, sizeof(struct bch_##_type)))
336 #endif /* _BCACHEFS_BTREE_UPDATE_H */