1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_BTREE_IO_H
3 #define _BCACHEFS_BTREE_IO_H
4
5 #include "bkey_methods.h"
6 #include "bset.h"
7 #include "btree_locking.h"
8 #include "checksum.h"
9 #include "extents.h"
10 #include "io_write_types.h"
11
12 struct bch_fs;
13 struct btree_write;
14 struct btree;
15 struct btree_iter;
16 struct btree_node_read_all;
17
18 static inline void set_btree_node_dirty_acct(struct bch_fs *c, struct btree *b)
19 {
20 if (!test_and_set_bit(BTREE_NODE_dirty, &b->flags))
21 atomic_inc(&c->btree_cache.dirty);
22 }
23
24 static inline void clear_btree_node_dirty_acct(struct bch_fs *c, struct btree *b)
25 {
26 if (test_and_clear_bit(BTREE_NODE_dirty, &b->flags))
27 atomic_dec(&c->btree_cache.dirty);
28 }
29
30 static inline unsigned btree_ptr_sectors_written(struct bkey_s_c k)
31 {
32 return k.k->type == KEY_TYPE_btree_ptr_v2
33 ? le16_to_cpu(bkey_s_c_to_btree_ptr_v2(k).v->sectors_written)
34 : 0;
35 }
36
37 struct btree_read_bio {
38 struct bch_fs *c;
39 struct btree *b;
40 struct btree_node_read_all *ra;
41 u64 start_time;
42 unsigned have_ioref:1;
43 unsigned idx:7;
44 struct extent_ptr_decoded pick;
45 struct work_struct work;
46 struct bio bio;
47 };
48
49 struct btree_write_bio {
50 struct work_struct work;
51 __BKEY_PADDED(key, BKEY_BTREE_PTR_VAL_U64s_MAX);
52 void *data;
53 unsigned data_bytes;
54 unsigned sector_offset;
55 struct bch_write_bio wbio;
56 };
57
58 void bch2_btree_node_io_unlock(struct btree *);
59 void bch2_btree_node_io_lock(struct btree *);
60 void __bch2_btree_node_wait_on_read(struct btree *);
61 void __bch2_btree_node_wait_on_write(struct btree *);
62 void bch2_btree_node_wait_on_read(struct btree *);
63 void bch2_btree_node_wait_on_write(struct btree *);
64
65 enum compact_mode {
66 COMPACT_LAZY,
67 COMPACT_ALL,
68 };
69
70 bool bch2_compact_whiteouts(struct bch_fs *, struct btree *,
71 enum compact_mode);
72
73 static inline bool should_compact_bset_lazy(struct btree *b,
74 struct bset_tree *t)
75 {
76 unsigned total_u64s = bset_u64s(t);
77 unsigned dead_u64s = bset_dead_u64s(b, t);
78
79 return dead_u64s > 64 && dead_u64s * 3 > total_u64s;
80 }
81
82 static inline bool bch2_maybe_compact_whiteouts(struct bch_fs *c, struct btree *b)
83 {
84 for_each_bset(b, t)
85 if (should_compact_bset_lazy(b, t))
86 return bch2_compact_whiteouts(c, b, COMPACT_LAZY);
87
88 return false;
89 }
90
91 static inline struct nonce btree_nonce(struct bset *i, unsigned offset)
92 {
93 return (struct nonce) {{
94 [0] = cpu_to_le32(offset),
95 [1] = ((__le32 *) &i->seq)[0],
96 [2] = ((__le32 *) &i->seq)[1],
97 [3] = ((__le32 *) &i->journal_seq)[0]^BCH_NONCE_BTREE,
98 }};
99 }
100
101 static inline int bset_encrypt(struct bch_fs *c, struct bset *i, unsigned offset)
102 {
103 struct nonce nonce = btree_nonce(i, offset);
104 int ret;
105
106 if (!offset) {
107 struct btree_node *bn = container_of(i, struct btree_node, keys);
108 unsigned bytes = (void *) &bn->keys - (void *) &bn->flags;
109
110 ret = bch2_encrypt(c, BSET_CSUM_TYPE(i), nonce,
111 &bn->flags, bytes);
112 if (ret)
113 return ret;
114
115 nonce = nonce_add(nonce, round_up(bytes, CHACHA_BLOCK_SIZE));
116 }
117
118 return bch2_encrypt(c, BSET_CSUM_TYPE(i), nonce, i->_data,
119 vstruct_end(i) - (void *) i->_data);
120 }
121
122 void bch2_btree_sort_into(struct bch_fs *, struct btree *, struct btree *);
123
124 void bch2_btree_node_drop_keys_outside_node(struct btree *);
125
126 void bch2_btree_build_aux_trees(struct btree *);
127 void bch2_btree_init_next(struct btree_trans *, struct btree *);
128
129 int bch2_btree_node_read_done(struct bch_fs *, struct bch_dev *,
130 struct btree *, bool, bool *);
131 void bch2_btree_node_read(struct btree_trans *, struct btree *, bool);
132 int bch2_btree_root_read(struct bch_fs *, enum btree_id,
133 const struct bkey_i *, unsigned);
134
135 bool bch2_btree_post_write_cleanup(struct bch_fs *, struct btree *);
136
137 enum btree_write_flags {
138 __BTREE_WRITE_ONLY_IF_NEED = BTREE_WRITE_TYPE_BITS,
139 __BTREE_WRITE_ALREADY_STARTED,
140 };
141 #define BTREE_WRITE_ONLY_IF_NEED BIT(__BTREE_WRITE_ONLY_IF_NEED)
142 #define BTREE_WRITE_ALREADY_STARTED BIT(__BTREE_WRITE_ALREADY_STARTED)
143
144 void __bch2_btree_node_write(struct bch_fs *, struct btree *, unsigned);
145 void bch2_btree_node_write(struct bch_fs *, struct btree *,
146 enum six_lock_type, unsigned);
147
148 static inline void btree_node_write_if_need(struct bch_fs *c, struct btree *b,
149 enum six_lock_type lock_held)
150 {
151 bch2_btree_node_write(c, b, lock_held, BTREE_WRITE_ONLY_IF_NEED);
152 }
153
154 bool bch2_btree_flush_all_reads(struct bch_fs *);
155 bool bch2_btree_flush_all_writes(struct bch_fs *);
156
157 static inline void compat_bformat(unsigned level, enum btree_id btree_id,
158 unsigned version, unsigned big_endian,
159 int write, struct bkey_format *f)
160 {
161 if (version < bcachefs_metadata_version_inode_btree_change &&
162 btree_id == BTREE_ID_inodes) {
163 swap(f->bits_per_field[BKEY_FIELD_INODE],
164 f->bits_per_field[BKEY_FIELD_OFFSET]);
165 swap(f->field_offset[BKEY_FIELD_INODE],
166 f->field_offset[BKEY_FIELD_OFFSET]);
167 }
168
169 if (version < bcachefs_metadata_version_snapshot &&
170 (level || btree_type_has_snapshots(btree_id))) {
171 u64 max_packed =
172 ~(~0ULL << f->bits_per_field[BKEY_FIELD_SNAPSHOT]);
173
174 f->field_offset[BKEY_FIELD_SNAPSHOT] = write
175 ? 0
176 : cpu_to_le64(U32_MAX - max_packed);
177 }
178 }
179
180 static inline void compat_bpos(unsigned level, enum btree_id btree_id,
181 unsigned version, unsigned big_endian,
182 int write, struct bpos *p)
183 {
184 if (big_endian != CPU_BIG_ENDIAN)
185 bch2_bpos_swab(p);
186
187 if (version < bcachefs_metadata_version_inode_btree_change &&
188 btree_id == BTREE_ID_inodes)
189 swap(p->inode, p->offset);
190 }
191
192 static inline void compat_btree_node(unsigned level, enum btree_id btree_id,
193 unsigned version, unsigned big_endian,
194 int write,
195 struct btree_node *bn)
196 {
197 if (version < bcachefs_metadata_version_inode_btree_change &&
198 btree_id_is_extents(btree_id) &&
199 !bpos_eq(bn->min_key, POS_MIN) &&
200 write)
201 bn->min_key = bpos_nosnap_predecessor(bn->min_key);
202
203 if (version < bcachefs_metadata_version_snapshot &&
204 write)
205 bn->max_key.snapshot = 0;
206
207 compat_bpos(level, btree_id, version, big_endian, write, &bn->min_key);
208 compat_bpos(level, btree_id, version, big_endian, write, &bn->max_key);
209
210 if (version < bcachefs_metadata_version_snapshot &&
211 !write)
212 bn->max_key.snapshot = U32_MAX;
213
214 if (version < bcachefs_metadata_version_inode_btree_change &&
215 btree_id_is_extents(btree_id) &&
216 !bpos_eq(bn->min_key, POS_MIN) &&
217 !write)
218 bn->min_key = bpos_nosnap_successor(bn->min_key);
219 }
220
221 void bch2_btree_write_stats_to_text(struct printbuf *, struct bch_fs *);
222
223 #endif /* _BCACHEFS_BTREE_IO_H */
224
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