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 #include "btrfs-list.h"
29 #define BTRFS_MKFS_SYSTEM_GROUP_SIZE (4 * 1024 * 1024)
30 #define BTRFS_MKFS_SMALL_VOLUME_SIZE (1024 * 1024 * 1024)
31 #define BTRFS_MKFS_DEFAULT_NODE_SIZE 16384
32 #define BTRFS_MKFS_DEFAULT_FEATURES \
33 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF \
34 | BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)
37 * Avoid multi-device features (RAID56) and mixed block groups
39 #define BTRFS_CONVERT_ALLOWED_FEATURES \
40 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF \
41 | BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL \
42 | BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO \
43 | BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 \
44 | BTRFS_FEATURE_INCOMPAT_BIG_METADATA \
45 | BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF \
46 | BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA \
47 | BTRFS_FEATURE_INCOMPAT_NO_HOLES)
49 #define BTRFS_CONVERT_META_GROUP_SIZE (32 * 1024 * 1024)
51 #define BTRFS_FEATURE_LIST_ALL (1ULL << 63)
53 #define BTRFS_SCAN_MOUNTED (1ULL << 0)
54 #define BTRFS_SCAN_LBLKID (1ULL << 1)
56 #define BTRFS_UPDATE_KERNEL 1
58 #define BTRFS_ARG_UNKNOWN 0
59 #define BTRFS_ARG_MNTPOINT 1
60 #define BTRFS_ARG_UUID 2
61 #define BTRFS_ARG_BLKDEV 3
62 #define BTRFS_ARG_REG 4
64 #define BTRFS_UUID_UNPARSED_SIZE 37
66 #define ARGV0_BUF_SIZE PATH_MAX
68 #define GETOPT_VAL_SI 256
69 #define GETOPT_VAL_IEC 257
70 #define GETOPT_VAL_RAW 258
71 #define GETOPT_VAL_HUMAN_READABLE 259
72 #define GETOPT_VAL_KBYTES 260
73 #define GETOPT_VAL_MBYTES 261
74 #define GETOPT_VAL_GBYTES 262
75 #define GETOPT_VAL_TBYTES 263
77 #define GETOPT_VAL_HELP 270
79 int check_argc_exact(int nargs, int expected);
80 int check_argc_min(int nargs, int expected);
81 int check_argc_max(int nargs, int expected);
83 void fixup_argv0(char **argv, const char *token);
84 void set_argv0(char **argv);
87 * Output modes of size
89 #define UNITS_RESERVED (0)
90 #define UNITS_BYTES (1)
91 #define UNITS_KBYTES (2)
92 #define UNITS_MBYTES (3)
93 #define UNITS_GBYTES (4)
94 #define UNITS_TBYTES (5)
95 #define UNITS_RAW (1U << UNITS_MODE_SHIFT)
96 #define UNITS_BINARY (2U << UNITS_MODE_SHIFT)
97 #define UNITS_DECIMAL (3U << UNITS_MODE_SHIFT)
98 #define UNITS_MODE_MASK ((1U << UNITS_MODE_SHIFT) - 1)
99 #define UNITS_MODE_SHIFT (8)
100 #define UNITS_HUMAN_BINARY (UNITS_BINARY)
101 #define UNITS_HUMAN_DECIMAL (UNITS_DECIMAL)
102 #define UNITS_HUMAN (UNITS_HUMAN_BINARY)
103 #define UNITS_DEFAULT (UNITS_HUMAN)
105 void units_set_mode(unsigned *units, unsigned mode);
106 void units_set_base(unsigned *units, unsigned base);
108 void btrfs_list_all_fs_features(u64 mask_disallowed);
109 char* btrfs_parse_fs_features(char *namelist, u64 *flags);
110 void btrfs_process_fs_features(u64 flags);
111 void btrfs_parse_features_to_string(char *buf, u64 flags);
113 struct btrfs_mkfs_config {
124 /* Super bytenr after make_btrfs */
128 struct btrfs_convert_context {
130 u32 first_data_block;
133 u32 free_inodes_count;
136 const struct btrfs_convert_operations *convert_ops;
138 /* The accurate used space of old filesystem */
139 struct cache_tree used;
141 /* Batched ranges which must be covered by data chunks */
142 struct cache_tree data_chunks;
144 /* Free space which is not covered by data_chunks */
145 struct cache_tree free;
150 int make_btrfs(int fd, struct btrfs_mkfs_config *cfg,
151 struct btrfs_convert_context *cctx);
152 int btrfs_make_root_dir(struct btrfs_trans_handle *trans,
153 struct btrfs_root *root, u64 objectid);
154 int btrfs_prepare_device(int fd, const char *file, int zero_end,
155 u64 *block_count_ret, u64 max_block_count, int discard);
156 int btrfs_add_to_fsid(struct btrfs_trans_handle *trans,
157 struct btrfs_root *root, int fd, char *path,
158 u64 block_count, u32 io_width, u32 io_align,
160 int btrfs_scan_for_fsid(int run_ioctls);
161 int btrfs_register_one_device(const char *fname);
162 int btrfs_register_all_devices(void);
163 char *canonicalize_dm_name(const char *ptname);
164 char *canonicalize_path(const char *path);
165 int check_mounted(const char *devicename);
166 int check_mounted_where(int fd, const char *file, char *where, int size,
167 struct btrfs_fs_devices **fs_devices_mnt);
168 int btrfs_device_already_in_root(struct btrfs_root *root, int fd,
171 int pretty_size_snprintf(u64 size, char *str, size_t str_bytes, unsigned unit_mode);
172 #define pretty_size(size) pretty_size_mode(size, UNITS_DEFAULT)
173 const char *pretty_size_mode(u64 size, unsigned mode);
175 int get_mountpt(char *dev, char *mntpt, size_t size);
176 u64 parse_size(char *s);
177 u64 parse_qgroupid(const char *p);
178 u64 arg_strtou64(const char *str);
179 int arg_copy_path(char *dest, const char *src, int destlen);
180 int open_file_or_dir(const char *fname, DIR **dirstream);
181 int open_file_or_dir3(const char *fname, DIR **dirstream, int open_flags);
182 void close_file_or_dir(int fd, DIR *dirstream);
183 int get_fs_info(char *path, struct btrfs_ioctl_fs_info_args *fi_args,
184 struct btrfs_ioctl_dev_info_args **di_ret);
185 int get_label(const char *btrfs_dev, char *label);
186 int set_label(const char *btrfs_dev, const char *label);
188 char *__strncpy_null(char *dest, const char *src, size_t n);
189 int is_block_device(const char *file);
190 int is_mount_point(const char *file);
191 int check_arg_type(const char *input);
192 int open_path_or_dev_mnt(const char *path, DIR **dirstream, int verbose);
193 int btrfs_open_dir(const char *path, DIR **dirstream, int verbose);
194 u64 btrfs_device_size(int fd, struct stat *st);
195 /* Helper to always get proper size of the destination string */
196 #define strncpy_null(dest, src) __strncpy_null(dest, src, sizeof(dest))
197 int test_dev_for_mkfs(const char *file, int force_overwrite);
198 int get_label_mounted(const char *mount_path, char *labelp);
199 int get_label_unmounted(const char *dev, char *label);
200 int test_num_disk_vs_raid(u64 metadata_profile, u64 data_profile,
201 u64 dev_cnt, int mixed, int ssd);
202 int group_profile_max_safe_loss(u64 flags);
203 int is_vol_small(const char *file);
204 int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
206 int ask_user(const char *question);
207 int lookup_ino_rootid(int fd, u64 *rootid);
208 int btrfs_scan_lblkid(void);
209 int get_btrfs_mount(const char *dev, char *mp, size_t mp_size);
210 int find_mount_root(const char *path, char **mount_root);
211 int get_device_info(int fd, u64 devid,
212 struct btrfs_ioctl_dev_info_args *di_args);
213 int test_uuid_unique(char *fs_uuid);
214 u64 disk_size(const char *path);
215 u64 get_partition_size(const char *dev);
217 int test_minimum_size(const char *file, u32 nodesize);
218 int test_issubvolname(const char *name);
219 int test_issubvolume(const char *path);
220 int test_isdir(const char *path);
222 const char *subvol_strip_mountpoint(const char *mnt, const char *full_path);
223 int get_subvol_info(const char *fullpath, struct root_info *get_ri);
226 * Btrfs minimum size calculation is complicated, it should include at least:
227 * 1. system group size
228 * 2. minimum global block reserve
229 * 3. metadata used at mkfs
230 * 4. space reservation to create uuid for first mount.
231 * Also, raid factor should also be taken into consideration.
232 * To avoid the overkill calculation, (system group + global block rsv) * 2
233 * for *EACH* device should be good enough.
235 static inline u64 btrfs_min_global_blk_rsv_size(u32 nodesize)
237 return (u64)nodesize << 10;
240 static inline u64 btrfs_min_dev_size(u32 nodesize)
242 return 2 * (BTRFS_MKFS_SYSTEM_GROUP_SIZE +
243 btrfs_min_global_blk_rsv_size(nodesize));
246 int find_next_key(struct btrfs_path *path, struct btrfs_key *key);
247 const char* btrfs_group_type_str(u64 flag);
248 const char* btrfs_group_profile_str(u64 flag);
251 * Get the length of the string converted from a u64 number.
253 * Result is equal to log10(num) + 1, but without the use of math library.
255 static inline int count_digits(u64 num)
268 static inline u64 div_factor(u64 num, int factor)
277 int btrfs_tree_search2_ioctl_supported(int fd);
278 int btrfs_check_nodesize(u32 nodesize, u32 sectorsize, u64 features);
280 const char *get_argv0_buf(void);
282 #define HELPINFO_UNITS_LONG \
283 "--raw raw numbers in bytes", \
284 "--human-readable human friendly numbers, base 1024 (default)", \
285 "--iec use 1024 as a base (KiB, MiB, GiB, TiB)", \
286 "--si use 1000 as a base (kB, MB, GB, TB)", \
287 "--kbytes show sizes in KiB, or kB with --si", \
288 "--mbytes show sizes in MiB, or MB with --si", \
289 "--gbytes show sizes in GiB, or GB with --si", \
290 "--tbytes show sizes in TiB, or TB with --si"
292 #define HELPINFO_UNITS_SHORT_LONG \
293 "-b|--raw raw numbers in bytes", \
294 "-h|--human-readable", \
295 " human friendly numbers, base 1024 (default)", \
296 "-H human friendly numbers, base 1000", \
297 "--iec use 1024 as a base (KiB, MiB, GiB, TiB)", \
298 "--si use 1000 as a base (kB, MB, GB, TB)", \
299 "-k|--kbytes show sizes in KiB, or kB with --si", \
300 "-m|--mbytes show sizes in MiB, or MB with --si", \
301 "-g|--gbytes show sizes in GiB, or GB with --si", \
302 "-t|--tbytes show sizes in TiB, or TB with --si"
304 unsigned int get_unit_mode_from_arg(int *argc, char *argv[], int df_mode);
305 void clean_args_no_options(int argc, char *argv[], const char * const *usage);
306 int string_is_numerical(const char *str);
308 __attribute__ ((format (printf, 1, 2)))
309 static inline void warning(const char *fmt, ...)
313 fputs("WARNING: ", stderr);
315 vfprintf(stderr, fmt, args);
320 __attribute__ ((format (printf, 1, 2)))
321 static inline void error(const char *fmt, ...)
325 fputs("ERROR: ", stderr);
327 vfprintf(stderr, fmt, args);
332 __attribute__ ((format (printf, 2, 3)))
333 static inline int warning_on(int condition, const char *fmt, ...)
340 fputs("WARNING: ", stderr);
342 vfprintf(stderr, fmt, args);
349 __attribute__ ((format (printf, 2, 3)))
350 static inline int error_on(int condition, const char *fmt, ...)
357 fputs("ERROR: ", stderr);
359 vfprintf(stderr, fmt, args);
366 /* Pseudo random number generator wrappers */
369 static inline int rand_int(void)
371 return (int)(rand_u32());
374 static inline u64 rand_u64(void)
384 static inline u16 rand_u16(void)
386 return (u16)(rand_u32());
389 static inline u8 rand_u8(void)
391 return (u8)(rand_u32());
394 /* Return random number in range [0, limit) */
395 unsigned int rand_range(unsigned int upper);
397 /* Also allow setting the seed manually */
398 void init_rand_seed(u64 seed);