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__
27 #define BTRFS_MKFS_SYSTEM_GROUP_SIZE (4 * 1024 * 1024)
28 #define BTRFS_MKFS_SMALL_VOLUME_SIZE (1024 * 1024 * 1024)
29 #define BTRFS_MKFS_DEFAULT_NODE_SIZE 16384
30 #define BTRFS_MKFS_DEFAULT_FEATURES \
31 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF \
32 | BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)
35 * Avoid multi-device features (RAID56) and mixed block groups
37 #define BTRFS_CONVERT_ALLOWED_FEATURES \
38 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF \
39 | BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL \
40 | BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO \
41 | BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 \
42 | BTRFS_FEATURE_INCOMPAT_BIG_METADATA \
43 | BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF \
44 | BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA \
45 | BTRFS_FEATURE_INCOMPAT_NO_HOLES)
47 #define BTRFS_FEATURE_LIST_ALL (1ULL << 63)
49 #define BTRFS_SCAN_MOUNTED (1ULL << 0)
50 #define BTRFS_SCAN_LBLKID (1ULL << 1)
52 #define BTRFS_UPDATE_KERNEL 1
54 #define BTRFS_ARG_UNKNOWN 0
55 #define BTRFS_ARG_MNTPOINT 1
56 #define BTRFS_ARG_UUID 2
57 #define BTRFS_ARG_BLKDEV 3
58 #define BTRFS_ARG_REG 4
60 #define BTRFS_UUID_UNPARSED_SIZE 37
62 #define ARGV0_BUF_SIZE PATH_MAX
64 #define GETOPT_VAL_SI 256
65 #define GETOPT_VAL_IEC 257
66 #define GETOPT_VAL_RAW 258
67 #define GETOPT_VAL_HUMAN_READABLE 259
68 #define GETOPT_VAL_KBYTES 260
69 #define GETOPT_VAL_MBYTES 261
70 #define GETOPT_VAL_GBYTES 262
71 #define GETOPT_VAL_TBYTES 263
73 #define GETOPT_VAL_HELP 270
75 int check_argc_exact(int nargs, int expected);
76 int check_argc_min(int nargs, int expected);
77 int check_argc_max(int nargs, int expected);
79 void fixup_argv0(char **argv, const char *token);
80 void set_argv0(char **argv);
83 * Output modes of size
85 #define UNITS_RESERVED (0)
86 #define UNITS_BYTES (1)
87 #define UNITS_KBYTES (2)
88 #define UNITS_MBYTES (3)
89 #define UNITS_GBYTES (4)
90 #define UNITS_TBYTES (5)
91 #define UNITS_RAW (1U << UNITS_MODE_SHIFT)
92 #define UNITS_BINARY (2U << UNITS_MODE_SHIFT)
93 #define UNITS_DECIMAL (3U << UNITS_MODE_SHIFT)
94 #define UNITS_MODE_MASK ((1U << UNITS_MODE_SHIFT) - 1)
95 #define UNITS_MODE_SHIFT (8)
96 #define UNITS_HUMAN_BINARY (UNITS_BINARY)
97 #define UNITS_HUMAN_DECIMAL (UNITS_DECIMAL)
98 #define UNITS_HUMAN (UNITS_HUMAN_BINARY)
99 #define UNITS_DEFAULT (UNITS_HUMAN)
101 void units_set_mode(unsigned *units, unsigned mode);
102 void units_set_base(unsigned *units, unsigned base);
104 void btrfs_list_all_fs_features(u64 mask_disallowed);
105 char* btrfs_parse_fs_features(char *namelist, u64 *flags);
106 void btrfs_process_fs_features(u64 flags);
107 void btrfs_parse_features_to_string(char *buf, u64 flags);
109 struct btrfs_mkfs_config {
120 int make_btrfs(int fd, struct btrfs_mkfs_config *cfg);
121 int btrfs_make_root_dir(struct btrfs_trans_handle *trans,
122 struct btrfs_root *root, u64 objectid);
123 int btrfs_prepare_device(int fd, char *file, int zero_end, u64 *block_count_ret,
124 u64 max_block_count, int discard);
125 int btrfs_add_to_fsid(struct btrfs_trans_handle *trans,
126 struct btrfs_root *root, int fd, char *path,
127 u64 block_count, u32 io_width, u32 io_align,
129 int btrfs_scan_for_fsid(int run_ioctls);
130 int btrfs_register_one_device(const char *fname);
131 int btrfs_register_all_devices(void);
132 char *canonicalize_dm_name(const char *ptname);
133 char *canonicalize_path(const char *path);
134 int check_mounted(const char *devicename);
135 int check_mounted_where(int fd, const char *file, char *where, int size,
136 struct btrfs_fs_devices **fs_devices_mnt);
137 int btrfs_device_already_in_root(struct btrfs_root *root, int fd,
140 int pretty_size_snprintf(u64 size, char *str, size_t str_bytes, unsigned unit_mode);
141 #define pretty_size(size) pretty_size_mode(size, UNITS_DEFAULT)
142 const char *pretty_size_mode(u64 size, unsigned mode);
144 int get_mountpt(char *dev, char *mntpt, size_t size);
145 u64 parse_size(char *s);
146 u64 parse_qgroupid(const char *p);
147 u64 arg_strtou64(const char *str);
148 int arg_copy_path(char *dest, const char *src, int destlen);
149 int open_file_or_dir(const char *fname, DIR **dirstream);
150 int open_file_or_dir3(const char *fname, DIR **dirstream, int open_flags);
151 void close_file_or_dir(int fd, DIR *dirstream);
152 int get_fs_info(char *path, struct btrfs_ioctl_fs_info_args *fi_args,
153 struct btrfs_ioctl_dev_info_args **di_ret);
154 int get_label(const char *btrfs_dev, char *label);
155 int set_label(const char *btrfs_dev, const char *label);
157 char *__strncpy__null(char *dest, const char *src, size_t n);
158 int is_block_device(const char *file);
159 int is_mount_point(const char *file);
160 int check_arg_type(const char *input);
161 int open_path_or_dev_mnt(const char *path, DIR **dirstream, int verbose);
162 int btrfs_open_dir(const char *path, DIR **dirstream, int verbose);
163 u64 btrfs_device_size(int fd, struct stat *st);
164 /* Helper to always get proper size of the destination string */
165 #define strncpy_null(dest, src) __strncpy__null(dest, src, sizeof(dest))
166 int test_dev_for_mkfs(char *file, int force_overwrite);
167 int get_label_mounted(const char *mount_path, char *labelp);
168 int get_label_unmounted(const char *dev, char *label);
169 int test_num_disk_vs_raid(u64 metadata_profile, u64 data_profile,
170 u64 dev_cnt, int mixed, int ssd);
171 int group_profile_max_safe_loss(u64 flags);
172 int is_vol_small(char *file);
173 int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
175 int ask_user(char *question);
176 int lookup_ino_rootid(int fd, u64 *rootid);
177 int btrfs_scan_lblkid(void);
178 int get_btrfs_mount(const char *dev, char *mp, size_t mp_size);
179 int find_mount_root(const char *path, char **mount_root);
180 int get_device_info(int fd, u64 devid,
181 struct btrfs_ioctl_dev_info_args *di_args);
182 int test_uuid_unique(char *fs_uuid);
183 u64 disk_size(char *path);
184 int get_device_info(int fd, u64 devid,
185 struct btrfs_ioctl_dev_info_args *di_args);
186 u64 get_partition_size(char *dev);
187 const char* group_type_str(u64 flags);
188 const char* group_profile_str(u64 flags);
190 int test_minimum_size(const char *file, u32 leafsize);
191 int test_issubvolname(const char *name);
192 int test_isdir(const char *path);
195 * Btrfs minimum size calculation is complicated, it should include at least:
196 * 1. system group size
197 * 2. minimum global block reserve
198 * 3. metadata used at mkfs
199 * 4. space reservation to create uuid for first mount.
200 * Also, raid factor should also be taken into consideration.
201 * To avoid the overkill calculation, (system group + global block rsv) * 2
202 * for *EACH* device should be good enough.
204 static inline u64 btrfs_min_global_blk_rsv_size(u32 leafsize)
206 return leafsize << 10;
208 static inline u64 btrfs_min_dev_size(u32 leafsize)
210 return 2 * (BTRFS_MKFS_SYSTEM_GROUP_SIZE +
211 btrfs_min_global_blk_rsv_size(leafsize));
214 int find_next_key(struct btrfs_path *path, struct btrfs_key *key);
215 char* btrfs_group_type_str(u64 flag);
216 char* btrfs_group_profile_str(u64 flag);
219 * Get the length of the string converted from a u64 number.
221 * Result is equal to log10(num) + 1, but without the use of math library.
223 static inline int count_digits(u64 num)
236 static inline u64 div_factor(u64 num, int factor)
245 int btrfs_tree_search2_ioctl_supported(int fd);
246 int btrfs_check_nodesize(u32 nodesize, u32 sectorsize, u64 features);
248 const char *get_argv0_buf(void);
250 #define HELPINFO_UNITS_LONG \
251 "--raw raw numbers in bytes", \
252 "--human-readable human friendly numbers, base 1024 (default)", \
253 "--iec use 1024 as a base (KiB, MiB, GiB, TiB)", \
254 "--si use 1000 as a base (kB, MB, GB, TB)", \
255 "--kbytes show sizes in KiB, or kB with --si", \
256 "--mbytes show sizes in MiB, or MB with --si", \
257 "--gbytes show sizes in GiB, or GB with --si", \
258 "--tbytes show sizes in TiB, or TB with --si"
260 #define HELPINFO_UNITS_SHORT_LONG \
261 "-b|--raw raw numbers in bytes", \
262 "-h|--human-readable", \
263 " human friendly numbers, base 1024 (default)", \
264 "-H human friendly numbers, base 1000", \
265 "--iec use 1024 as a base (KiB, MiB, GiB, TiB)", \
266 "--si use 1000 as a base (kB, MB, GB, TB)", \
267 "-k|--kbytes show sizes in KiB, or kB with --si", \
268 "-m|--mbytes show sizes in MiB, or MB with --si", \
269 "-g|--gbytes show sizes in GiB, or GB with --si", \
270 "-t|--tbytes show sizes in TiB, or TB with --si"
272 unsigned int get_unit_mode_from_arg(int *argc, char *argv[], int df_mode);
273 int string_is_numerical(const char *str);
275 static inline void warning(const char *fmt, ...)
279 fputs("WARNING: ", stderr);
281 vfprintf(stderr, fmt, args);
286 static inline void error(const char *fmt, ...)
290 fputs("ERROR: ", stderr);
292 vfprintf(stderr, fmt, args);
297 static inline int warning_on(int condition, const char *fmt, ...)
304 fputs("WARNING: ", stderr);
306 vfprintf(stderr, fmt, args);
313 static inline int error_on(int condition, const char *fmt, ...)
320 fputs("ERROR: ", stderr);
322 vfprintf(stderr, fmt, args);