2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_UTILS_H__
20 #define __BTRFS_UTILS_H__
26 #include "common-defs.h"
28 #include "btrfs-list.h"
31 #define BTRFS_CONVERT_META_GROUP_SIZE SZ_32M
33 #define BTRFS_SCAN_MOUNTED (1ULL << 0)
34 #define BTRFS_SCAN_LBLKID (1ULL << 1)
36 #define BTRFS_UPDATE_KERNEL 1
38 #define BTRFS_ARG_UNKNOWN 0
39 #define BTRFS_ARG_MNTPOINT 1
40 #define BTRFS_ARG_UUID 2
41 #define BTRFS_ARG_BLKDEV 3
42 #define BTRFS_ARG_REG 4
45 * Output modes of size
47 #define UNITS_RESERVED (0)
48 #define UNITS_BYTES (1)
49 #define UNITS_KBYTES (2)
50 #define UNITS_MBYTES (3)
51 #define UNITS_GBYTES (4)
52 #define UNITS_TBYTES (5)
53 #define UNITS_RAW (1U << UNITS_MODE_SHIFT)
54 #define UNITS_BINARY (2U << UNITS_MODE_SHIFT)
55 #define UNITS_DECIMAL (3U << UNITS_MODE_SHIFT)
56 /* Interpret the u64 value as s64 */
57 #define UNITS_NEGATIVE (4U << UNITS_MODE_SHIFT)
58 #define UNITS_MODE_MASK ((1U << UNITS_MODE_SHIFT) - 1)
59 #define UNITS_MODE_SHIFT (8)
60 #define UNITS_HUMAN_BINARY (UNITS_BINARY)
61 #define UNITS_HUMAN_DECIMAL (UNITS_DECIMAL)
62 #define UNITS_HUMAN (UNITS_HUMAN_BINARY)
63 #define UNITS_DEFAULT (UNITS_HUMAN)
65 void units_set_mode(unsigned *units, unsigned mode);
66 void units_set_base(unsigned *units, unsigned base);
68 #define PREP_DEVICE_ZERO_END (1U << 0)
69 #define PREP_DEVICE_DISCARD (1U << 1)
70 #define PREP_DEVICE_VERBOSE (1U << 2)
72 int btrfs_make_root_dir(struct btrfs_trans_handle *trans,
73 struct btrfs_root *root, u64 objectid);
74 int btrfs_prepare_device(int fd, const char *file, u64 *block_count_ret,
75 u64 max_block_count, unsigned opflags);
76 int btrfs_add_to_fsid(struct btrfs_trans_handle *trans,
77 struct btrfs_root *root, int fd, const char *path,
78 u64 block_count, u32 io_width, u32 io_align,
80 int btrfs_scan_for_fsid(int run_ioctls);
81 int btrfs_register_one_device(const char *fname);
82 int btrfs_register_all_devices(void);
83 char *canonicalize_dm_name(const char *ptname);
84 char *canonicalize_path(const char *path);
85 int check_mounted(const char *devicename);
86 int check_mounted_where(int fd, const char *file, char *where, int size,
87 struct btrfs_fs_devices **fs_devices_mnt);
88 int btrfs_device_already_in_root(struct btrfs_root *root, int fd,
91 int pretty_size_snprintf(u64 size, char *str, size_t str_bytes, unsigned unit_mode);
92 #define pretty_size(size) pretty_size_mode(size, UNITS_DEFAULT)
93 const char *pretty_size_mode(u64 size, unsigned mode);
95 u64 parse_size(char *s);
96 u64 parse_qgroupid(const char *p);
97 u64 arg_strtou64(const char *str);
98 int arg_copy_path(char *dest, const char *src, int destlen);
99 int open_file_or_dir(const char *fname, DIR **dirstream);
100 int open_file_or_dir3(const char *fname, DIR **dirstream, int open_flags);
101 void close_file_or_dir(int fd, DIR *dirstream);
102 int get_fs_info(const char *path, struct btrfs_ioctl_fs_info_args *fi_args,
103 struct btrfs_ioctl_dev_info_args **di_ret);
104 int get_label(const char *btrfs_dev, char *label);
105 int set_label(const char *btrfs_dev, const char *label);
107 char *__strncpy_null(char *dest, const char *src, size_t n);
108 int is_block_device(const char *file);
109 int is_mount_point(const char *file);
110 int check_arg_type(const char *input);
111 int open_path_or_dev_mnt(const char *path, DIR **dirstream, int verbose);
112 int btrfs_open_dir(const char *path, DIR **dirstream, int verbose);
113 u64 btrfs_device_size(int fd, struct stat *st);
114 /* Helper to always get proper size of the destination string */
115 #define strncpy_null(dest, src) __strncpy_null(dest, src, sizeof(dest))
116 int get_label_mounted(const char *mount_path, char *labelp);
117 int get_label_unmounted(const char *dev, char *label);
118 int group_profile_max_safe_loss(u64 flags);
119 int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
121 int ask_user(const char *question);
122 int lookup_path_rootid(int fd, u64 *rootid);
123 int btrfs_scan_devices(void);
124 int get_btrfs_mount(const char *dev, char *mp, size_t mp_size);
125 int find_mount_root(const char *path, char **mount_root);
126 int get_device_info(int fd, u64 devid,
127 struct btrfs_ioctl_dev_info_args *di_args);
128 int test_uuid_unique(char *fs_uuid);
129 u64 disk_size(const char *path);
130 u64 get_partition_size(const char *dev);
132 int test_issubvolname(const char *name);
133 int test_issubvolume(const char *path);
134 int test_isdir(const char *path);
136 const char *subvol_strip_mountpoint(const char *mnt, const char *full_path);
137 int get_subvol_info(const char *fullpath, struct root_info *get_ri);
139 int find_next_key(struct btrfs_path *path, struct btrfs_key *key);
140 const char* btrfs_group_type_str(u64 flag);
141 const char* btrfs_group_profile_str(u64 flag);
144 * Get the length of the string converted from a u64 number.
146 * Result is equal to log10(num) + 1, but without the use of math library.
148 static inline int count_digits(u64 num)
161 static inline u64 div_factor(u64 num, int factor)
170 int btrfs_tree_search2_ioctl_supported(int fd);
172 unsigned int get_unit_mode_from_arg(int *argc, char *argv[], int df_mode);
173 int string_is_numerical(const char *str);
175 #if DEBUG_VERBOSE_ERROR
176 #define PRINT_VERBOSE_ERROR fprintf(stderr, "%s:%d:", __FILE__, __LINE__)
178 #define PRINT_VERBOSE_ERROR
181 #if DEBUG_TRACE_ON_ERROR
182 #define PRINT_TRACE_ON_ERROR print_trace()
184 #define PRINT_TRACE_ON_ERROR
187 #if DEBUG_ABORT_ON_ERROR
188 #define DO_ABORT_ON_ERROR abort()
190 #define DO_ABORT_ON_ERROR
193 #define error(fmt, ...) \
195 PRINT_TRACE_ON_ERROR; \
196 PRINT_VERBOSE_ERROR; \
197 __error((fmt), ##__VA_ARGS__); \
201 #define error_on(cond, fmt, ...) \
204 PRINT_TRACE_ON_ERROR; \
206 PRINT_VERBOSE_ERROR; \
207 __error_on((cond), (fmt), ##__VA_ARGS__); \
212 #define warning(fmt, ...) \
214 PRINT_TRACE_ON_ERROR; \
215 PRINT_VERBOSE_ERROR; \
216 __warning((fmt), ##__VA_ARGS__); \
219 #define warning_on(cond, fmt, ...) \
222 PRINT_TRACE_ON_ERROR; \
224 PRINT_VERBOSE_ERROR; \
225 __warning_on((cond), (fmt), ##__VA_ARGS__); \
229 * Global program state, configurable by command line and available to
230 * functions without extra context passing.
232 struct btrfs_config {
234 extern struct btrfs_config bconf;
236 void btrfs_config_init(void);
238 __attribute__ ((format (printf, 1, 2)))
239 static inline void __warning(const char *fmt, ...)
243 fputs("WARNING: ", stderr);
245 vfprintf(stderr, fmt, args);
250 __attribute__ ((format (printf, 1, 2)))
251 static inline void __error(const char *fmt, ...)
255 fputs("ERROR: ", stderr);
257 vfprintf(stderr, fmt, args);
262 __attribute__ ((format (printf, 2, 3)))
263 static inline int __warning_on(int condition, const char *fmt, ...)
270 fputs("WARNING: ", stderr);
272 vfprintf(stderr, fmt, args);
279 __attribute__ ((format (printf, 2, 3)))
280 static inline int __error_on(int condition, const char *fmt, ...)
287 fputs("ERROR: ", stderr);
289 vfprintf(stderr, fmt, args);
296 /* Pseudo random number generator wrappers */
299 static inline int rand_int(void)
301 return (int)(rand_u32());
304 static inline u64 rand_u64(void)
314 static inline u16 rand_u16(void)
316 return (u16)(rand_u32());
319 static inline u8 rand_u8(void)
321 return (u8)(rand_u32());
324 /* Return random number in range [0, limit) */
325 unsigned int rand_range(unsigned int upper);
327 /* Also allow setting the seed manually */
328 void init_rand_seed(u64 seed);