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 {
115 char fs_uuid[BTRFS_UUID_UNPARSED_SIZE];
116 char chunk_uuid[BTRFS_UUID_UNPARSED_SIZE];
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 #define PREP_DEVICE_ZERO_END (1U << 0)
151 #define PREP_DEVICE_DISCARD (1U << 1)
152 #define PREP_DEVICE_VERBOSE (1U << 2)
154 int make_btrfs(int fd, struct btrfs_mkfs_config *cfg,
155 struct btrfs_convert_context *cctx);
156 int btrfs_make_root_dir(struct btrfs_trans_handle *trans,
157 struct btrfs_root *root, u64 objectid);
158 int btrfs_prepare_device(int fd, const char *file, u64 *block_count_ret,
159 u64 max_block_count, unsigned opflags);
160 int btrfs_add_to_fsid(struct btrfs_trans_handle *trans,
161 struct btrfs_root *root, int fd, const char *path,
162 u64 block_count, u32 io_width, u32 io_align,
164 int btrfs_scan_for_fsid(int run_ioctls);
165 int btrfs_register_one_device(const char *fname);
166 int btrfs_register_all_devices(void);
167 char *canonicalize_dm_name(const char *ptname);
168 char *canonicalize_path(const char *path);
169 int check_mounted(const char *devicename);
170 int check_mounted_where(int fd, const char *file, char *where, int size,
171 struct btrfs_fs_devices **fs_devices_mnt);
172 int btrfs_device_already_in_root(struct btrfs_root *root, int fd,
175 int pretty_size_snprintf(u64 size, char *str, size_t str_bytes, unsigned unit_mode);
176 #define pretty_size(size) pretty_size_mode(size, UNITS_DEFAULT)
177 const char *pretty_size_mode(u64 size, unsigned mode);
179 u64 parse_size(char *s);
180 u64 parse_qgroupid(const char *p);
181 u64 arg_strtou64(const char *str);
182 int arg_copy_path(char *dest, const char *src, int destlen);
183 int open_file_or_dir(const char *fname, DIR **dirstream);
184 int open_file_or_dir3(const char *fname, DIR **dirstream, int open_flags);
185 void close_file_or_dir(int fd, DIR *dirstream);
186 int get_fs_info(const char *path, struct btrfs_ioctl_fs_info_args *fi_args,
187 struct btrfs_ioctl_dev_info_args **di_ret);
188 int get_label(const char *btrfs_dev, char *label);
189 int set_label(const char *btrfs_dev, const char *label);
191 char *__strncpy_null(char *dest, const char *src, size_t n);
192 int is_block_device(const char *file);
193 int is_mount_point(const char *file);
194 int check_arg_type(const char *input);
195 int open_path_or_dev_mnt(const char *path, DIR **dirstream, int verbose);
196 int btrfs_open_dir(const char *path, DIR **dirstream, int verbose);
197 u64 btrfs_device_size(int fd, struct stat *st);
198 /* Helper to always get proper size of the destination string */
199 #define strncpy_null(dest, src) __strncpy_null(dest, src, sizeof(dest))
200 int test_dev_for_mkfs(const char *file, int force_overwrite);
201 int get_label_mounted(const char *mount_path, char *labelp);
202 int get_label_unmounted(const char *dev, char *label);
203 int test_num_disk_vs_raid(u64 metadata_profile, u64 data_profile,
204 u64 dev_cnt, int mixed, int ssd);
205 int group_profile_max_safe_loss(u64 flags);
206 int is_vol_small(const char *file);
207 int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
209 int ask_user(const char *question);
210 int lookup_ino_rootid(int fd, u64 *rootid);
211 int btrfs_scan_lblkid(void);
212 int get_btrfs_mount(const char *dev, char *mp, size_t mp_size);
213 int find_mount_root(const char *path, char **mount_root);
214 int get_device_info(int fd, u64 devid,
215 struct btrfs_ioctl_dev_info_args *di_args);
216 int test_uuid_unique(char *fs_uuid);
217 u64 disk_size(const char *path);
218 u64 get_partition_size(const char *dev);
220 int test_minimum_size(const char *file, u32 nodesize);
221 int test_issubvolname(const char *name);
222 int test_issubvolume(const char *path);
223 int test_isdir(const char *path);
225 const char *subvol_strip_mountpoint(const char *mnt, const char *full_path);
226 int get_subvol_info(const char *fullpath, struct root_info *get_ri);
229 * Btrfs minimum size calculation is complicated, it should include at least:
230 * 1. system group size
231 * 2. minimum global block reserve
232 * 3. metadata used at mkfs
233 * 4. space reservation to create uuid for first mount.
234 * Also, raid factor should also be taken into consideration.
235 * To avoid the overkill calculation, (system group + global block rsv) * 2
236 * for *EACH* device should be good enough.
238 static inline u64 btrfs_min_global_blk_rsv_size(u32 nodesize)
240 return (u64)nodesize << 10;
243 static inline u64 btrfs_min_dev_size(u32 nodesize)
245 return 2 * (BTRFS_MKFS_SYSTEM_GROUP_SIZE +
246 btrfs_min_global_blk_rsv_size(nodesize));
249 int find_next_key(struct btrfs_path *path, struct btrfs_key *key);
250 const char* btrfs_group_type_str(u64 flag);
251 const char* btrfs_group_profile_str(u64 flag);
254 * Get the length of the string converted from a u64 number.
256 * Result is equal to log10(num) + 1, but without the use of math library.
258 static inline int count_digits(u64 num)
271 static inline u64 div_factor(u64 num, int factor)
280 int btrfs_tree_search2_ioctl_supported(int fd);
281 int btrfs_check_nodesize(u32 nodesize, u32 sectorsize, u64 features);
283 const char *get_argv0_buf(void);
285 #define HELPINFO_UNITS_LONG \
286 "--raw raw numbers in bytes", \
287 "--human-readable human friendly numbers, base 1024 (default)", \
288 "--iec use 1024 as a base (KiB, MiB, GiB, TiB)", \
289 "--si use 1000 as a base (kB, MB, GB, TB)", \
290 "--kbytes show sizes in KiB, or kB with --si", \
291 "--mbytes show sizes in MiB, or MB with --si", \
292 "--gbytes show sizes in GiB, or GB with --si", \
293 "--tbytes show sizes in TiB, or TB with --si"
295 #define HELPINFO_UNITS_SHORT_LONG \
296 "-b|--raw raw numbers in bytes", \
297 "-h|--human-readable", \
298 " human friendly numbers, base 1024 (default)", \
299 "-H human friendly numbers, base 1000", \
300 "--iec use 1024 as a base (KiB, MiB, GiB, TiB)", \
301 "--si use 1000 as a base (kB, MB, GB, TB)", \
302 "-k|--kbytes show sizes in KiB, or kB with --si", \
303 "-m|--mbytes show sizes in MiB, or MB with --si", \
304 "-g|--gbytes show sizes in GiB, or GB with --si", \
305 "-t|--tbytes show sizes in TiB, or TB with --si"
307 unsigned int get_unit_mode_from_arg(int *argc, char *argv[], int df_mode);
308 void clean_args_no_options(int argc, char *argv[], const char * const *usage);
309 void clean_args_no_options_relaxed(int argc, char *argv[],
310 const char * const *usagestr);
311 int string_is_numerical(const char *str);
313 #if DEBUG_VERBOSE_ERROR
314 #define PRINT_VERBOSE_ERROR fprintf(stderr, "%s:%d:", __FILE__, __LINE__)
316 #define PRINT_VERBOSE_ERROR
319 #if DEBUG_TRACE_ON_ERROR
320 #define PRINT_TRACE_ON_ERROR print_trace()
322 #define PRINT_TRACE_ON_ERROR
325 #if DEBUG_ABORT_ON_ERROR
326 #define DO_ABORT_ON_ERROR abort()
328 #define DO_ABORT_ON_ERROR
331 #define error(fmt, ...) \
333 PRINT_TRACE_ON_ERROR; \
334 PRINT_VERBOSE_ERROR; \
335 __error((fmt), ##__VA_ARGS__); \
339 #define error_on(cond, fmt, ...) \
342 PRINT_TRACE_ON_ERROR; \
344 PRINT_VERBOSE_ERROR; \
345 __error_on((cond), (fmt), ##__VA_ARGS__); \
350 #define warning(fmt, ...) \
352 PRINT_TRACE_ON_ERROR; \
353 PRINT_VERBOSE_ERROR; \
354 __warning((fmt), ##__VA_ARGS__); \
357 #define warning_on(cond, fmt, ...) \
360 PRINT_TRACE_ON_ERROR; \
362 PRINT_VERBOSE_ERROR; \
363 __warning_on((cond), (fmt), ##__VA_ARGS__); \
366 __attribute__ ((format (printf, 1, 2)))
367 static inline void __warning(const char *fmt, ...)
371 fputs("WARNING: ", stderr);
373 vfprintf(stderr, fmt, args);
378 __attribute__ ((format (printf, 1, 2)))
379 static inline void __error(const char *fmt, ...)
383 fputs("ERROR: ", stderr);
385 vfprintf(stderr, fmt, args);
390 __attribute__ ((format (printf, 2, 3)))
391 static inline int __warning_on(int condition, const char *fmt, ...)
398 fputs("WARNING: ", stderr);
400 vfprintf(stderr, fmt, args);
407 __attribute__ ((format (printf, 2, 3)))
408 static inline int __error_on(int condition, const char *fmt, ...)
415 fputs("ERROR: ", stderr);
417 vfprintf(stderr, fmt, args);
424 /* Pseudo random number generator wrappers */
427 static inline int rand_int(void)
429 return (int)(rand_u32());
432 static inline u64 rand_u64(void)
442 static inline u16 rand_u16(void)
444 return (u16)(rand_u32());
447 static inline u8 rand_u8(void)
449 return (u8)(rand_u32());
452 /* Return random number in range [0, limit) */
453 unsigned int rand_range(unsigned int upper);
455 /* Also allow setting the seed manually */
456 void init_rand_seed(u64 seed);