summaryrefslogtreecommitdiffstats
path: root/fs/bcachefs/inode.h
blob: f1fcb4c58039a5f6ee0a9185a6d3fd8065944399 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_INODE_H
#define _BCACHEFS_INODE_H

#include "bkey.h"
#include "bkey_methods.h"
#include "opts.h"

enum bch_validate_flags;
extern const char * const bch2_inode_opts[];

int bch2_inode_validate(struct bch_fs *, struct bkey_s_c,
		       enum bch_validate_flags);
int bch2_inode_v2_validate(struct bch_fs *, struct bkey_s_c,
			  enum bch_validate_flags);
int bch2_inode_v3_validate(struct bch_fs *, struct bkey_s_c,
			  enum bch_validate_flags);
void bch2_inode_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);

int bch2_trigger_inode(struct btree_trans *, enum btree_id, unsigned,
		       struct bkey_s_c, struct bkey_s,
		       enum btree_iter_update_trigger_flags);

#define bch2_bkey_ops_inode ((struct bkey_ops) {	\
	.key_validate	= bch2_inode_validate,		\
	.val_to_text	= bch2_inode_to_text,		\
	.trigger	= bch2_trigger_inode,		\
	.min_val_size	= 16,				\
})

#define bch2_bkey_ops_inode_v2 ((struct bkey_ops) {	\
	.key_validate	= bch2_inode_v2_validate,	\
	.val_to_text	= bch2_inode_to_text,		\
	.trigger	= bch2_trigger_inode,		\
	.min_val_size	= 32,				\
})

#define bch2_bkey_ops_inode_v3 ((struct bkey_ops) {	\
	.key_validate	= bch2_inode_v3_validate,	\
	.val_to_text	= bch2_inode_to_text,		\
	.trigger	= bch2_trigger_inode,		\
	.min_val_size	= 48,				\
})

static inline bool bkey_is_inode(const struct bkey *k)
{
	return  k->type == KEY_TYPE_inode ||
		k->type == KEY_TYPE_inode_v2 ||
		k->type == KEY_TYPE_inode_v3;
}

int bch2_inode_generation_validate(struct bch_fs *, struct bkey_s_c,
				  enum bch_validate_flags);
void bch2_inode_generation_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);

#define bch2_bkey_ops_inode_generation ((struct bkey_ops) {	\
	.key_validate	= bch2_inode_generation_validate,	\
	.val_to_text	= bch2_inode_generation_to_text,	\
	.min_val_size	= 8,					\
})

#if 0
typedef struct {
	u64			lo;
	u32			hi;
} __packed __aligned(4) u96;
#endif
typedef u64 u96;

struct bch_inode_unpacked {
	u64			bi_inum;
	u64			bi_journal_seq;
	__le64			bi_hash_seed;
	u64			bi_size;
	u64			bi_sectors;
	u64			bi_version;
	u32			bi_flags;
	u16			bi_mode;

#define x(_name, _bits)	u##_bits _name;
	BCH_INODE_FIELDS_v3()
#undef  x
};

struct bkey_inode_buf {
	struct bkey_i_inode_v3	inode;

#define x(_name, _bits)		+ 8 + _bits / 8
	u8		_pad[0 + BCH_INODE_FIELDS_v3()];
#undef  x
};

void bch2_inode_pack(struct bkey_inode_buf *, const struct bch_inode_unpacked *);
int bch2_inode_unpack(struct bkey_s_c, struct bch_inode_unpacked *);
struct bkey_i *bch2_inode_to_v3(struct btree_trans *, struct bkey_i *);

void bch2_inode_unpacked_to_text(struct printbuf *, struct bch_inode_unpacked *);

int bch2_inode_peek_nowarn(struct btree_trans *, struct btree_iter *,
		    struct bch_inode_unpacked *, subvol_inum, unsigned);
int bch2_inode_peek(struct btree_trans *, struct btree_iter *,
		    struct bch_inode_unpacked *, subvol_inum, unsigned);

int bch2_inode_write_flags(struct btree_trans *, struct btree_iter *,
		     struct bch_inode_unpacked *, enum btree_iter_update_trigger_flags);

static inline int bch2_inode_write(struct btree_trans *trans,
		     struct btree_iter *iter,
		     struct bch_inode_unpacked *inode)
{
	return bch2_inode_write_flags(trans, iter, inode, 0);
}

int __bch2_fsck_write_inode(struct btree_trans *, struct bch_inode_unpacked *, u32);
int bch2_fsck_write_inode(struct btree_trans *, struct bch_inode_unpacked *, u32);

void bch2_inode_init_early(struct bch_fs *,
			   struct bch_inode_unpacked *);
void bch2_inode_init_late(struct bch_inode_unpacked *, u64,
			  uid_t, gid_t, umode_t, dev_t,
			  struct bch_inode_unpacked *);
void bch2_inode_init(struct bch_fs *, struct bch_inode_unpacked *,
		     uid_t, gid_t, umode_t, dev_t,
		     struct bch_inode_unpacked *);

int bch2_inode_create(struct btree_trans *, struct btree_iter *,
		      struct bch_inode_unpacked *, u32, u64);

int bch2_inode_rm(struct bch_fs *, subvol_inum);

int bch2_inode_find_by_inum_nowarn_trans(struct btree_trans *,
				  subvol_inum,
				  struct bch_inode_unpacked *);
int bch2_inode_find_by_inum_trans(struct btree_trans *, subvol_inum,
				  struct bch_inode_unpacked *);
int bch2_inode_find_by_inum(struct bch_fs *, subvol_inum,
			    struct bch_inode_unpacked *);

#define inode_opt_get(_c, _inode, _name)			\
	((_inode)->bi_##_name ? (_inode)->bi_##_name - 1 : (_c)->opts._name)

static inline void bch2_inode_opt_set(struct bch_inode_unpacked *inode,
				      enum inode_opt_id id, u64 v)
{
	switch (id) {
#define x(_name, ...)							\
	case Inode_opt_##_name:						\
		inode->bi_##_name = v;					\
		break;
	BCH_INODE_OPTS()
#undef x
	default:
		BUG();
	}
}

static inline u64 bch2_inode_opt_get(struct bch_inode_unpacked *inode,
				     enum inode_opt_id id)
{
	switch (id) {
#define x(_name, ...)							\
	case Inode_opt_##_name:						\
		return inode->bi_##_name;
	BCH_INODE_OPTS()
#undef x
	default:
		BUG();
	}
}

static inline u8 mode_to_type(umode_t mode)
{
	return (mode >> 12) & 15;
}

static inline u8 inode_d_type(struct bch_inode_unpacked *inode)
{
	return inode->bi_subvol ? DT_SUBVOL : mode_to_type(inode->bi_mode);
}

static inline u32 bch2_inode_flags(struct bkey_s_c k)
{
	switch (k.k->type) {
	case KEY_TYPE_inode:
		return le32_to_cpu(bkey_s_c_to_inode(k).v->bi_flags);
	case KEY_TYPE_inode_v2:
		return le64_to_cpu(bkey_s_c_to_inode_v2(k).v->bi_flags);
	case KEY_TYPE_inode_v3:
		return le64_to_cpu(bkey_s_c_to_inode_v3(k).v->bi_flags);
	default:
		return 0;
	}
}

/* i_nlink: */

static inline unsigned nlink_bias(umode_t mode)
{
	return S_ISDIR(mode) ? 2 : 1;
}

static inline unsigned bch2_inode_nlink_get(struct bch_inode_unpacked *bi)
{
	return bi->bi_flags & BCH_INODE_unlinked
		  ? 0
		  : bi->bi_nlink + nlink_bias(bi->bi_mode);
}

static inline void bch2_inode_nlink_set(struct bch_inode_unpacked *bi,
					unsigned nlink)
{
	if (nlink) {
		bi->bi_nlink = nlink - nlink_bias(bi->bi_mode);
		bi->bi_flags &= ~BCH_INODE_unlinked;
	} else {
		bi->bi_nlink = 0;
		bi->bi_flags |= BCH_INODE_unlinked;
	}
}

int bch2_inode_nlink_inc(struct bch_inode_unpacked *);
void bch2_inode_nlink_dec(struct btree_trans *, struct bch_inode_unpacked *);

static inline bool bch2_inode_should_have_bp(struct bch_inode_unpacked *inode)
{
	bool inode_has_bp = inode->bi_dir || inode->bi_dir_offset;

	return S_ISDIR(inode->bi_mode) ||
		(!inode->bi_nlink && inode_has_bp);
}

struct bch_opts bch2_inode_opts_to_opts(struct bch_inode_unpacked *);
void bch2_inode_opts_get(struct bch_io_opts *, struct bch_fs *,
			 struct bch_inode_unpacked *);
int bch2_inum_opts_get(struct btree_trans*, subvol_inum, struct bch_io_opts *);

int bch2_inode_rm_snapshot(struct btree_trans *, u64, u32);
int bch2_delete_dead_inodes(struct bch_fs *);

#endif /* _BCACHEFS_INODE_H */