1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_BTREE_UPDATE_H
3 #define _BCACHEFS_BTREE_UPDATE_H
4
5 #include "btree_iter.h"
6 #include "journal.h"
7
8 struct bch_fs;
9 struct btree;
10
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 *,
15 struct bkey_i *);
16
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);
20
21 void bch2_btree_insert_key_leaf(struct btree_trans *, struct btree_path *,
22 struct bkey_i *, u64);
23
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")\
32
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()
38 #undef x
39 };
40
41 enum bch_trans_commit_flags {
42 #define x(n, ...) BCH_TRANS_COMMIT_##n = BIT(__BCH_TRANS_COMMIT_##n),
43 BCH_TRANS_COMMIT_FLAGS()
44 #undef x
45 };
46
47 int bch2_btree_delete_extent_at(struct btree_trans *, struct btree_iter *,
48 unsigned, unsigned);
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);
51
52 int bch2_btree_insert_nonextent(struct btree_trans *, enum btree_id,
53 struct bkey_i *, enum btree_update_flags);
54
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);
59
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 *);
64
65 int bch2_btree_bit_mod(struct btree_trans *, enum btree_id, struct bpos, bool);
66 int bch2_btree_bit_mod_buffered(struct btree_trans *, enum btree_id, struct bpos, bool);
67
bch2_btree_delete_at_buffered(struct btree_trans * trans,enum btree_id btree,struct bpos pos)68 static inline int bch2_btree_delete_at_buffered(struct btree_trans *trans,
69 enum btree_id btree, struct bpos pos)
70 {
71 return bch2_btree_bit_mod_buffered(trans, btree, pos, false);
72 }
73
74 int __bch2_insert_snapshot_whiteouts(struct btree_trans *, enum btree_id,
75 struct bpos, struct bpos);
76
77 /*
78 * For use when splitting extents in existing snapshots:
79 *
80 * If @old_pos is an interior snapshot node, iterate over descendent snapshot
81 * nodes: for every descendent snapshot in whiche @old_pos is overwritten and
82 * not visible, emit a whiteout at @new_pos.
83 */
bch2_insert_snapshot_whiteouts(struct btree_trans * trans,enum btree_id btree,struct bpos old_pos,struct bpos new_pos)84 static inline int bch2_insert_snapshot_whiteouts(struct btree_trans *trans,
85 enum btree_id btree,
86 struct bpos old_pos,
87 struct bpos new_pos)
88 {
89 if (!btree_type_has_snapshots(btree) ||
90 bkey_eq(old_pos, new_pos))
91 return 0;
92
93 return __bch2_insert_snapshot_whiteouts(trans, btree, old_pos, new_pos);
94 }
95
96 int bch2_trans_update_extent_overwrite(struct btree_trans *, struct btree_iter *,
97 enum btree_update_flags,
98 struct bkey_s_c, struct bkey_s_c);
99
100 int bch2_bkey_get_empty_slot(struct btree_trans *, struct btree_iter *,
101 enum btree_id, struct bpos);
102
103 int __must_check bch2_trans_update(struct btree_trans *, struct btree_iter *,
104 struct bkey_i *, enum btree_update_flags);
105
106 struct jset_entry *__bch2_trans_jset_entry_alloc(struct btree_trans *, unsigned);
107
btree_trans_journal_entries_top(struct btree_trans * trans)108 static inline struct jset_entry *btree_trans_journal_entries_top(struct btree_trans *trans)
109 {
110 return (void *) ((u64 *) trans->journal_entries + trans->journal_entries_u64s);
111 }
112
113 static inline struct jset_entry *
bch2_trans_jset_entry_alloc(struct btree_trans * trans,unsigned u64s)114 bch2_trans_jset_entry_alloc(struct btree_trans *trans, unsigned u64s)
115 {
116 if (!trans->journal_entries ||
117 trans->journal_entries_u64s + u64s > trans->journal_entries_size)
118 return __bch2_trans_jset_entry_alloc(trans, u64s);
119
120 struct jset_entry *e = btree_trans_journal_entries_top(trans);
121 trans->journal_entries_u64s += u64s;
122 return e;
123 }
124
125 int bch2_btree_insert_clone_trans(struct btree_trans *, enum btree_id, struct bkey_i *);
126
bch2_trans_update_buffered(struct btree_trans * trans,enum btree_id btree,struct bkey_i * k)127 static inline int __must_check bch2_trans_update_buffered(struct btree_trans *trans,
128 enum btree_id btree,
129 struct bkey_i *k)
130 {
131 if (unlikely(trans->journal_replay_not_finished))
132 return bch2_btree_insert_clone_trans(trans, btree, k);
133
134 struct jset_entry *e = bch2_trans_jset_entry_alloc(trans, jset_u64s(k->k.u64s));
135 int ret = PTR_ERR_OR_ZERO(e);
136 if (ret)
137 return ret;
138
139 journal_entry_init(e, BCH_JSET_ENTRY_write_buffer_keys, btree, 0, k->k.u64s);
140 bkey_copy(e->start, k);
141 return 0;
142 }
143
144 void bch2_trans_commit_hook(struct btree_trans *,
145 struct btree_trans_commit_hook *);
146 int __bch2_trans_commit(struct btree_trans *, unsigned);
147
148 __printf(2, 3) int bch2_fs_log_msg(struct bch_fs *, const char *, ...);
149 __printf(2, 3) int bch2_journal_log_msg(struct bch_fs *, const char *, ...);
150
151 /**
152 * bch2_trans_commit - insert keys at given iterator positions
153 *
154 * This is main entry point for btree updates.
155 *
156 * Return values:
157 * -EROFS: filesystem read only
158 * -EIO: journal or btree node IO error
159 */
bch2_trans_commit(struct btree_trans * trans,struct disk_reservation * disk_res,u64 * journal_seq,unsigned flags)160 static inline int bch2_trans_commit(struct btree_trans *trans,
161 struct disk_reservation *disk_res,
162 u64 *journal_seq,
163 unsigned flags)
164 {
165 trans->disk_res = disk_res;
166 trans->journal_seq = journal_seq;
167
168 return __bch2_trans_commit(trans, flags);
169 }
170
171 #define commit_do(_trans, _disk_res, _journal_seq, _flags, _do) \
172 lockrestart_do(_trans, _do ?: bch2_trans_commit(_trans, (_disk_res),\
173 (_journal_seq), (_flags)))
174
175 #define nested_commit_do(_trans, _disk_res, _journal_seq, _flags, _do) \
176 nested_lockrestart_do(_trans, _do ?: bch2_trans_commit(_trans, (_disk_res),\
177 (_journal_seq), (_flags)))
178
179 #define bch2_trans_run(_c, _do) \
180 ({ \
181 struct btree_trans *trans = bch2_trans_get(_c); \
182 int _ret = (_do); \
183 bch2_trans_put(trans); \
184 _ret; \
185 })
186
187 #define bch2_trans_do(_c, _disk_res, _journal_seq, _flags, _do) \
188 bch2_trans_run(_c, commit_do(trans, _disk_res, _journal_seq, _flags, _do))
189
190 #define trans_for_each_update(_trans, _i) \
191 for (struct btree_insert_entry *_i = (_trans)->updates; \
192 (_i) < (_trans)->updates + (_trans)->nr_updates; \
193 (_i)++)
194
bch2_trans_reset_updates(struct btree_trans * trans)195 static inline void bch2_trans_reset_updates(struct btree_trans *trans)
196 {
197 trans_for_each_update(trans, i)
198 bch2_path_put(trans, i->path, true);
199
200 trans->nr_updates = 0;
201 trans->journal_entries_u64s = 0;
202 trans->hooks = NULL;
203 trans->extra_disk_res = 0;
204
205 if (trans->fs_usage_deltas) {
206 trans->fs_usage_deltas->used = 0;
207 memset((void *) trans->fs_usage_deltas +
208 offsetof(struct replicas_delta_list, memset_start), 0,
209 (void *) &trans->fs_usage_deltas->memset_end -
210 (void *) &trans->fs_usage_deltas->memset_start);
211 }
212 }
213
__bch2_bkey_make_mut_noupdate(struct btree_trans * trans,struct bkey_s_c k,unsigned type,unsigned min_bytes)214 static inline struct bkey_i *__bch2_bkey_make_mut_noupdate(struct btree_trans *trans, struct bkey_s_c k,
215 unsigned type, unsigned min_bytes)
216 {
217 unsigned bytes = max_t(unsigned, min_bytes, bkey_bytes(k.k));
218 struct bkey_i *mut;
219
220 if (type && k.k->type != type)
221 return ERR_PTR(-ENOENT);
222
223 mut = bch2_trans_kmalloc_nomemzero(trans, bytes);
224 if (!IS_ERR(mut)) {
225 bkey_reassemble(mut, k);
226
227 if (unlikely(bytes > bkey_bytes(k.k))) {
228 memset((void *) mut + bkey_bytes(k.k), 0,
229 bytes - bkey_bytes(k.k));
230 mut->k.u64s = DIV_ROUND_UP(bytes, sizeof(u64));
231 }
232 }
233 return mut;
234 }
235
bch2_bkey_make_mut_noupdate(struct btree_trans * trans,struct bkey_s_c k)236 static inline struct bkey_i *bch2_bkey_make_mut_noupdate(struct btree_trans *trans, struct bkey_s_c k)
237 {
238 return __bch2_bkey_make_mut_noupdate(trans, k, 0, 0);
239 }
240
241 #define bch2_bkey_make_mut_noupdate_typed(_trans, _k, _type) \
242 bkey_i_to_##_type(__bch2_bkey_make_mut_noupdate(_trans, _k, \
243 KEY_TYPE_##_type, sizeof(struct bkey_i_##_type)))
244
__bch2_bkey_make_mut(struct btree_trans * trans,struct btree_iter * iter,struct bkey_s_c * k,unsigned flags,unsigned type,unsigned min_bytes)245 static inline struct bkey_i *__bch2_bkey_make_mut(struct btree_trans *trans, struct btree_iter *iter,
246 struct bkey_s_c *k, unsigned flags,
247 unsigned type, unsigned min_bytes)
248 {
249 struct bkey_i *mut = __bch2_bkey_make_mut_noupdate(trans, *k, type, min_bytes);
250 int ret;
251
252 if (IS_ERR(mut))
253 return mut;
254
255 ret = bch2_trans_update(trans, iter, mut, flags);
256 if (ret)
257 return ERR_PTR(ret);
258
259 *k = bkey_i_to_s_c(mut);
260 return mut;
261 }
262
bch2_bkey_make_mut(struct btree_trans * trans,struct btree_iter * iter,struct bkey_s_c * k,unsigned flags)263 static inline struct bkey_i *bch2_bkey_make_mut(struct btree_trans *trans, struct btree_iter *iter,
264 struct bkey_s_c *k, unsigned flags)
265 {
266 return __bch2_bkey_make_mut(trans, iter, k, flags, 0, 0);
267 }
268
269 #define bch2_bkey_make_mut_typed(_trans, _iter, _k, _flags, _type) \
270 bkey_i_to_##_type(__bch2_bkey_make_mut(_trans, _iter, _k, _flags,\
271 KEY_TYPE_##_type, sizeof(struct bkey_i_##_type)))
272
__bch2_bkey_get_mut_noupdate(struct btree_trans * trans,struct btree_iter * iter,unsigned btree_id,struct bpos pos,unsigned flags,unsigned type,unsigned min_bytes)273 static inline struct bkey_i *__bch2_bkey_get_mut_noupdate(struct btree_trans *trans,
274 struct btree_iter *iter,
275 unsigned btree_id, struct bpos pos,
276 unsigned flags, unsigned type, unsigned min_bytes)
277 {
278 struct bkey_s_c k = __bch2_bkey_get_iter(trans, iter,
279 btree_id, pos, flags|BTREE_ITER_INTENT, type);
280 struct bkey_i *ret = IS_ERR(k.k)
281 ? ERR_CAST(k.k)
282 : __bch2_bkey_make_mut_noupdate(trans, k, 0, min_bytes);
283 if (IS_ERR(ret))
284 bch2_trans_iter_exit(trans, iter);
285 return ret;
286 }
287
bch2_bkey_get_mut_noupdate(struct btree_trans * trans,struct btree_iter * iter,unsigned btree_id,struct bpos pos,unsigned flags)288 static inline struct bkey_i *bch2_bkey_get_mut_noupdate(struct btree_trans *trans,
289 struct btree_iter *iter,
290 unsigned btree_id, struct bpos pos,
291 unsigned flags)
292 {
293 return __bch2_bkey_get_mut_noupdate(trans, iter, btree_id, pos, flags, 0, 0);
294 }
295
__bch2_bkey_get_mut(struct btree_trans * trans,struct btree_iter * iter,unsigned btree_id,struct bpos pos,unsigned flags,unsigned type,unsigned min_bytes)296 static inline struct bkey_i *__bch2_bkey_get_mut(struct btree_trans *trans,
297 struct btree_iter *iter,
298 unsigned btree_id, struct bpos pos,
299 unsigned flags, unsigned type, unsigned min_bytes)
300 {
301 struct bkey_i *mut = __bch2_bkey_get_mut_noupdate(trans, iter,
302 btree_id, pos, flags|BTREE_ITER_INTENT, type, min_bytes);
303 int ret;
304
305 if (IS_ERR(mut))
306 return mut;
307
308 ret = bch2_trans_update(trans, iter, mut, flags);
309 if (ret) {
310 bch2_trans_iter_exit(trans, iter);
311 return ERR_PTR(ret);
312 }
313
314 return mut;
315 }
316
bch2_bkey_get_mut_minsize(struct btree_trans * trans,struct btree_iter * iter,unsigned btree_id,struct bpos pos,unsigned flags,unsigned min_bytes)317 static inline struct bkey_i *bch2_bkey_get_mut_minsize(struct btree_trans *trans,
318 struct btree_iter *iter,
319 unsigned btree_id, struct bpos pos,
320 unsigned flags, unsigned min_bytes)
321 {
322 return __bch2_bkey_get_mut(trans, iter, btree_id, pos, flags, 0, min_bytes);
323 }
324
bch2_bkey_get_mut(struct btree_trans * trans,struct btree_iter * iter,unsigned btree_id,struct bpos pos,unsigned flags)325 static inline struct bkey_i *bch2_bkey_get_mut(struct btree_trans *trans,
326 struct btree_iter *iter,
327 unsigned btree_id, struct bpos pos,
328 unsigned flags)
329 {
330 return __bch2_bkey_get_mut(trans, iter, btree_id, pos, flags, 0, 0);
331 }
332
333 #define bch2_bkey_get_mut_typed(_trans, _iter, _btree_id, _pos, _flags, _type)\
334 bkey_i_to_##_type(__bch2_bkey_get_mut(_trans, _iter, \
335 _btree_id, _pos, _flags, \
336 KEY_TYPE_##_type, sizeof(struct bkey_i_##_type)))
337
__bch2_bkey_alloc(struct btree_trans * trans,struct btree_iter * iter,unsigned flags,unsigned type,unsigned val_size)338 static inline struct bkey_i *__bch2_bkey_alloc(struct btree_trans *trans, struct btree_iter *iter,
339 unsigned flags, unsigned type, unsigned val_size)
340 {
341 struct bkey_i *k = bch2_trans_kmalloc(trans, sizeof(*k) + val_size);
342 int ret;
343
344 if (IS_ERR(k))
345 return k;
346
347 bkey_init(&k->k);
348 k->k.p = iter->pos;
349 k->k.type = type;
350 set_bkey_val_bytes(&k->k, val_size);
351
352 ret = bch2_trans_update(trans, iter, k, flags);
353 if (unlikely(ret))
354 return ERR_PTR(ret);
355 return k;
356 }
357
358 #define bch2_bkey_alloc(_trans, _iter, _flags, _type) \
359 bkey_i_to_##_type(__bch2_bkey_alloc(_trans, _iter, _flags, \
360 KEY_TYPE_##_type, sizeof(struct bch_##_type)))
361
362 #endif /* _BCACHEFS_BTREE_UPDATE_H */
363