File: utils.h

package info (click to toggle)
btrfs-progs 4.20.1-2
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 14,444 kB
  • sloc: ansic: 90,777; sh: 7,369; python: 1,256; makefile: 654
file content (193 lines) | stat: -rw-r--r-- 6,826 bytes parent folder | download | duplicates (2)
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
/*
 * Copyright (C) 2007 Oracle.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License v2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 021110-1307, USA.
 */

#ifndef __BTRFS_UTILS_H__
#define __BTRFS_UTILS_H__

#include <sys/stat.h>
#include "ctree.h"
#include <dirent.h>
#include <stdarg.h>
#include "common-defs.h"
#include "internal.h"
#include "btrfs-list.h"
#include "sizes.h"
#include "messages.h"
#include "ioctl.h"
#include "fsfeatures.h"

#define BTRFS_SCAN_MOUNTED	(1ULL << 0)
#define BTRFS_SCAN_LBLKID	(1ULL << 1)

#define BTRFS_UPDATE_KERNEL	1

#define BTRFS_ARG_UNKNOWN	0
#define BTRFS_ARG_MNTPOINT	1
#define BTRFS_ARG_UUID		2
#define BTRFS_ARG_BLKDEV	3
#define BTRFS_ARG_REG		4

/*
 * Output modes of size
 */
#define UNITS_RESERVED			(0)
#define UNITS_BYTES			(1)
#define UNITS_KBYTES			(2)
#define UNITS_MBYTES			(3)
#define UNITS_GBYTES			(4)
#define UNITS_TBYTES			(5)
#define UNITS_RAW			(1U << UNITS_MODE_SHIFT)
#define UNITS_BINARY			(2U << UNITS_MODE_SHIFT)
#define UNITS_DECIMAL			(3U << UNITS_MODE_SHIFT)
/* Interpret the u64 value as s64 */
#define UNITS_NEGATIVE			(4U << UNITS_MODE_SHIFT)
#define UNITS_MODE_MASK			((1U << UNITS_MODE_SHIFT) - 1)
#define UNITS_MODE_SHIFT		(8)
#define UNITS_HUMAN_BINARY		(UNITS_BINARY)
#define UNITS_HUMAN_DECIMAL		(UNITS_DECIMAL)
#define UNITS_HUMAN			(UNITS_HUMAN_BINARY)
#define UNITS_DEFAULT			(UNITS_HUMAN)

void units_set_mode(unsigned *units, unsigned mode);
void units_set_base(unsigned *units, unsigned base);

#define	PREP_DEVICE_ZERO_END	(1U << 0)
#define	PREP_DEVICE_DISCARD	(1U << 1)
#define	PREP_DEVICE_VERBOSE	(1U << 2)

#define SEEN_FSID_HASH_SIZE 256
struct seen_fsid {
	u8 fsid[BTRFS_FSID_SIZE];
	struct seen_fsid *next;
	DIR *dirstream;
	int fd;
};

int btrfs_make_root_dir(struct btrfs_trans_handle *trans,
			struct btrfs_root *root, u64 objectid);
int btrfs_prepare_device(int fd, const char *file, u64 *block_count_ret,
		u64 max_block_count, unsigned opflags);
int btrfs_add_to_fsid(struct btrfs_trans_handle *trans,
		      struct btrfs_root *root, int fd, const char *path,
		      u64 block_count, u32 io_width, u32 io_align,
		      u32 sectorsize);
int btrfs_scan_for_fsid(int run_ioctls);
int btrfs_register_one_device(const char *fname);
int btrfs_register_all_devices(void);
char *canonicalize_dm_name(const char *ptname);
char *canonicalize_path(const char *path);
int check_mounted(const char *devicename);
int check_mounted_where(int fd, const char *file, char *where, int size,
		struct btrfs_fs_devices **fs_devices_mnt, unsigned sbflags);
int btrfs_device_already_in_root(struct btrfs_root *root, int fd,
				 int super_offset);

int pretty_size_snprintf(u64 size, char *str, size_t str_bytes, unsigned unit_mode);
#define pretty_size(size) 	pretty_size_mode(size, UNITS_DEFAULT)
const char *pretty_size_mode(u64 size, unsigned mode);

u64 parse_size(char *s);
u64 parse_qgroupid(const char *p);
u64 arg_strtou64(const char *str);
int arg_copy_path(char *dest, const char *src, int destlen);
int open_file_or_dir(const char *fname, DIR **dirstream);
int open_file_or_dir3(const char *fname, DIR **dirstream, int open_flags);
void close_file_or_dir(int fd, DIR *dirstream);
int get_fs_info(const char *path, struct btrfs_ioctl_fs_info_args *fi_args,
		struct btrfs_ioctl_dev_info_args **di_ret);
int get_fsid(const char *path, u8 *fsid, int silent);

int is_seen_fsid(u8 *fsid, struct seen_fsid *seen_fsid_hash[]);
int add_seen_fsid(u8 *fsid, struct seen_fsid *seen_fsid_hash[],
		int fd, DIR *dirstream);
void free_seen_fsid(struct seen_fsid *seen_fsid_hash[]);

int get_label(const char *btrfs_dev, char *label);
int set_label(const char *btrfs_dev, const char *label);

char *__strncpy_null(char *dest, const char *src, size_t n);
int is_block_device(const char *file);
int is_mount_point(const char *file);
int is_path_exist(const char *file);
int is_reg_file(const char *path);
int check_arg_type(const char *input);
int open_path_or_dev_mnt(const char *path, DIR **dirstream, int verbose);
int btrfs_open(const char *path, DIR **dirstream, int verbose, int dir_only);
int btrfs_open_dir(const char *path, DIR **dirstream, int verbose);
int btrfs_open_file_or_dir(const char *path, DIR **dirstream, int verbose);
u64 btrfs_device_size(int fd, struct stat *st);
/* Helper to always get proper size of the destination string */
#define strncpy_null(dest, src) __strncpy_null(dest, src, sizeof(dest))
int get_label_mounted(const char *mount_path, char *labelp);
int get_label_unmounted(const char *dev, char *label);
int group_profile_max_safe_loss(u64 flags);
int csum_tree_block(struct btrfs_fs_info *root, struct extent_buffer *buf,
		    int verify);
int ask_user(const char *question);
int lookup_path_rootid(int fd, u64 *rootid);
int btrfs_scan_devices(void);
int get_btrfs_mount(const char *dev, char *mp, size_t mp_size);
int find_mount_root(const char *path, char **mount_root);
int get_device_info(int fd, u64 devid,
		struct btrfs_ioctl_dev_info_args *di_args);
int test_uuid_unique(char *fs_uuid);
u64 disk_size(const char *path);
u64 get_partition_size(const char *dev);

int test_issubvolname(const char *name);
int test_isdir(const char *path);

const char *subvol_strip_mountpoint(const char *mnt, const char *full_path);
int find_next_key(struct btrfs_path *path, struct btrfs_key *key);
const char* btrfs_group_type_str(u64 flag);
const char* btrfs_group_profile_str(u64 flag);

int count_digits(u64 num);
u64 div_factor(u64 num, int factor);

int btrfs_tree_search2_ioctl_supported(int fd);

unsigned int get_unit_mode_from_arg(int *argc, char *argv[], int df_mode);
int string_is_numerical(const char *str);
int prefixcmp(const char *str, const char *prefix);

unsigned long total_memory(void);

void print_device_info(struct btrfs_device *device, char *prefix);
void print_all_devices(struct list_head *devices);

/*
 * Global program state, configurable by command line and available to
 * functions without extra context passing.
 */
struct btrfs_config {
};
extern struct btrfs_config bconf;

void btrfs_config_init(void);

/* Pseudo random number generator wrappers */
int rand_int(void);
u8 rand_u8(void);
u16 rand_u16(void);
u32 rand_u32(void);
u64 rand_u64(void);
unsigned int rand_range(unsigned int upper);
void init_rand_seed(u64 seed);

#endif