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"
30 #define BTRFS_MKFS_SYSTEM_GROUP_SIZE SZ_4M
31 #define BTRFS_MKFS_SMALL_VOLUME_SIZE SZ_1G
32 #define BTRFS_MKFS_DEFAULT_NODE_SIZE SZ_16K
33 #define BTRFS_MKFS_DEFAULT_FEATURES \
34 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF \
35 | BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)
38 * Avoid multi-device features (RAID56) and mixed block groups
40 #define BTRFS_CONVERT_ALLOWED_FEATURES \
41 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF \
42 | BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL \
43 | BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO \
44 | BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 \
45 | BTRFS_FEATURE_INCOMPAT_BIG_METADATA \
46 | BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF \
47 | BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA \
48 | BTRFS_FEATURE_INCOMPAT_NO_HOLES)
50 #define BTRFS_CONVERT_META_GROUP_SIZE SZ_32M
52 #define BTRFS_FEATURE_LIST_ALL (1ULL << 63)
54 #define BTRFS_SCAN_MOUNTED (1ULL << 0)
55 #define BTRFS_SCAN_LBLKID (1ULL << 1)
57 #define BTRFS_UPDATE_KERNEL 1
59 #define BTRFS_ARG_UNKNOWN 0
60 #define BTRFS_ARG_MNTPOINT 1
61 #define BTRFS_ARG_UUID 2
62 #define BTRFS_ARG_BLKDEV 3
63 #define BTRFS_ARG_REG 4
65 #define BTRFS_UUID_UNPARSED_SIZE 37
68 * Output modes of size
70 #define UNITS_RESERVED (0)
71 #define UNITS_BYTES (1)
72 #define UNITS_KBYTES (2)
73 #define UNITS_MBYTES (3)
74 #define UNITS_GBYTES (4)
75 #define UNITS_TBYTES (5)
76 #define UNITS_RAW (1U << UNITS_MODE_SHIFT)
77 #define UNITS_BINARY (2U << UNITS_MODE_SHIFT)
78 #define UNITS_DECIMAL (3U << UNITS_MODE_SHIFT)
79 /* Interpret the u64 value as s64 */
80 #define UNITS_NEGATIVE (4U << UNITS_MODE_SHIFT)
81 #define UNITS_MODE_MASK ((1U << UNITS_MODE_SHIFT) - 1)
82 #define UNITS_MODE_SHIFT (8)
83 #define UNITS_HUMAN_BINARY (UNITS_BINARY)
84 #define UNITS_HUMAN_DECIMAL (UNITS_DECIMAL)
85 #define UNITS_HUMAN (UNITS_HUMAN_BINARY)
86 #define UNITS_DEFAULT (UNITS_HUMAN)
88 void units_set_mode(unsigned *units, unsigned mode);
89 void units_set_base(unsigned *units, unsigned base);
91 void btrfs_list_all_fs_features(u64 mask_disallowed);
92 char* btrfs_parse_fs_features(char *namelist, u64 *flags);
93 void btrfs_process_fs_features(u64 flags);
94 void btrfs_parse_features_to_string(char *buf, u64 flags);
95 void print_kernel_version(FILE *stream, u32 version);
96 u32 get_running_kernel_version(void);
98 struct btrfs_mkfs_config {
100 char fs_uuid[BTRFS_UUID_UNPARSED_SIZE];
101 char chunk_uuid[BTRFS_UUID_UNPARSED_SIZE];
109 /* Super bytenr after make_btrfs */
113 struct btrfs_convert_context {
115 u32 first_data_block;
118 u32 free_inodes_count;
121 const struct btrfs_convert_operations *convert_ops;
123 /* The accurate used space of old filesystem */
124 struct cache_tree used;
126 /* Batched ranges which must be covered by data chunks */
127 struct cache_tree data_chunks;
129 /* Free space which is not covered by data_chunks */
130 struct cache_tree free;
135 #define PREP_DEVICE_ZERO_END (1U << 0)
136 #define PREP_DEVICE_DISCARD (1U << 1)
137 #define PREP_DEVICE_VERBOSE (1U << 2)
139 int make_btrfs(int fd, struct btrfs_mkfs_config *cfg);
140 int make_convert_btrfs(int fd, struct btrfs_mkfs_config *cfg,
141 struct btrfs_convert_context *cctx);
142 int btrfs_make_root_dir(struct btrfs_trans_handle *trans,
143 struct btrfs_root *root, u64 objectid);
144 int btrfs_prepare_device(int fd, const char *file, u64 *block_count_ret,
145 u64 max_block_count, unsigned opflags);
146 int btrfs_add_to_fsid(struct btrfs_trans_handle *trans,
147 struct btrfs_root *root, int fd, const char *path,
148 u64 block_count, u32 io_width, u32 io_align,
150 int btrfs_scan_for_fsid(int run_ioctls);
151 int btrfs_register_one_device(const char *fname);
152 int btrfs_register_all_devices(void);
153 char *canonicalize_dm_name(const char *ptname);
154 char *canonicalize_path(const char *path);
155 int check_mounted(const char *devicename);
156 int check_mounted_where(int fd, const char *file, char *where, int size,
157 struct btrfs_fs_devices **fs_devices_mnt);
158 int btrfs_device_already_in_root(struct btrfs_root *root, int fd,
161 int pretty_size_snprintf(u64 size, char *str, size_t str_bytes, unsigned unit_mode);
162 #define pretty_size(size) pretty_size_mode(size, UNITS_DEFAULT)
163 const char *pretty_size_mode(u64 size, unsigned mode);
165 u64 parse_size(char *s);
166 u64 parse_qgroupid(const char *p);
167 u64 arg_strtou64(const char *str);
168 int arg_copy_path(char *dest, const char *src, int destlen);
169 int open_file_or_dir(const char *fname, DIR **dirstream);
170 int open_file_or_dir3(const char *fname, DIR **dirstream, int open_flags);
171 void close_file_or_dir(int fd, DIR *dirstream);
172 int get_fs_info(const char *path, struct btrfs_ioctl_fs_info_args *fi_args,
173 struct btrfs_ioctl_dev_info_args **di_ret);
174 int get_label(const char *btrfs_dev, char *label);
175 int set_label(const char *btrfs_dev, const char *label);
177 char *__strncpy_null(char *dest, const char *src, size_t n);
178 int is_block_device(const char *file);
179 int is_mount_point(const char *file);
180 int check_arg_type(const char *input);
181 int open_path_or_dev_mnt(const char *path, DIR **dirstream, int verbose);
182 int btrfs_open_dir(const char *path, DIR **dirstream, int verbose);
183 u64 btrfs_device_size(int fd, struct stat *st);
184 /* Helper to always get proper size of the destination string */
185 #define strncpy_null(dest, src) __strncpy_null(dest, src, sizeof(dest))
186 int test_dev_for_mkfs(const char *file, int force_overwrite);
187 int get_label_mounted(const char *mount_path, char *labelp);
188 int get_label_unmounted(const char *dev, char *label);
189 int test_num_disk_vs_raid(u64 metadata_profile, u64 data_profile,
190 u64 dev_cnt, int mixed, int ssd);
191 int group_profile_max_safe_loss(u64 flags);
192 int is_vol_small(const char *file);
193 int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
195 int ask_user(const char *question);
196 int lookup_path_rootid(int fd, u64 *rootid);
197 int btrfs_scan_devices(void);
198 int get_btrfs_mount(const char *dev, char *mp, size_t mp_size);
199 int find_mount_root(const char *path, char **mount_root);
200 int get_device_info(int fd, u64 devid,
201 struct btrfs_ioctl_dev_info_args *di_args);
202 int test_uuid_unique(char *fs_uuid);
203 u64 disk_size(const char *path);
204 u64 get_partition_size(const char *dev);
206 int test_minimum_size(const char *file, u32 nodesize);
207 int test_issubvolname(const char *name);
208 int test_issubvolume(const char *path);
209 int test_isdir(const char *path);
211 const char *subvol_strip_mountpoint(const char *mnt, const char *full_path);
212 int get_subvol_info(const char *fullpath, struct root_info *get_ri);
215 * Btrfs minimum size calculation is complicated, it should include at least:
216 * 1. system group size
217 * 2. minimum global block reserve
218 * 3. metadata used at mkfs
219 * 4. space reservation to create uuid for first mount.
220 * Also, raid factor should also be taken into consideration.
221 * To avoid the overkill calculation, (system group + global block rsv) * 2
222 * for *EACH* device should be good enough.
224 static inline u64 btrfs_min_global_blk_rsv_size(u32 nodesize)
226 return (u64)nodesize << 10;
229 static inline u64 btrfs_min_dev_size(u32 nodesize)
231 return 2 * (BTRFS_MKFS_SYSTEM_GROUP_SIZE +
232 btrfs_min_global_blk_rsv_size(nodesize));
235 int find_next_key(struct btrfs_path *path, struct btrfs_key *key);
236 const char* btrfs_group_type_str(u64 flag);
237 const char* btrfs_group_profile_str(u64 flag);
240 * Get the length of the string converted from a u64 number.
242 * Result is equal to log10(num) + 1, but without the use of math library.
244 static inline int count_digits(u64 num)
257 static inline u64 div_factor(u64 num, int factor)
266 int btrfs_tree_search2_ioctl_supported(int fd);
267 int btrfs_check_nodesize(u32 nodesize, u32 sectorsize, u64 features);
269 unsigned int get_unit_mode_from_arg(int *argc, char *argv[], int df_mode);
270 int string_is_numerical(const char *str);
272 #if DEBUG_VERBOSE_ERROR
273 #define PRINT_VERBOSE_ERROR fprintf(stderr, "%s:%d:", __FILE__, __LINE__)
275 #define PRINT_VERBOSE_ERROR
278 #if DEBUG_TRACE_ON_ERROR
279 #define PRINT_TRACE_ON_ERROR print_trace()
281 #define PRINT_TRACE_ON_ERROR
284 #if DEBUG_ABORT_ON_ERROR
285 #define DO_ABORT_ON_ERROR abort()
287 #define DO_ABORT_ON_ERROR
290 #define error(fmt, ...) \
292 PRINT_TRACE_ON_ERROR; \
293 PRINT_VERBOSE_ERROR; \
294 __error((fmt), ##__VA_ARGS__); \
298 #define error_on(cond, fmt, ...) \
301 PRINT_TRACE_ON_ERROR; \
303 PRINT_VERBOSE_ERROR; \
304 __error_on((cond), (fmt), ##__VA_ARGS__); \
309 #define warning(fmt, ...) \
311 PRINT_TRACE_ON_ERROR; \
312 PRINT_VERBOSE_ERROR; \
313 __warning((fmt), ##__VA_ARGS__); \
316 #define warning_on(cond, fmt, ...) \
319 PRINT_TRACE_ON_ERROR; \
321 PRINT_VERBOSE_ERROR; \
322 __warning_on((cond), (fmt), ##__VA_ARGS__); \
326 * Global program state, configurable by command line and available to
327 * functions without extra context passing.
329 struct btrfs_config {
331 extern struct btrfs_config bconf;
333 void btrfs_config_init(void);
335 __attribute__ ((format (printf, 1, 2)))
336 static inline void __warning(const char *fmt, ...)
340 fputs("WARNING: ", stderr);
342 vfprintf(stderr, fmt, args);
347 __attribute__ ((format (printf, 1, 2)))
348 static inline void __error(const char *fmt, ...)
352 fputs("ERROR: ", stderr);
354 vfprintf(stderr, fmt, args);
359 __attribute__ ((format (printf, 2, 3)))
360 static inline int __warning_on(int condition, const char *fmt, ...)
367 fputs("WARNING: ", stderr);
369 vfprintf(stderr, fmt, args);
376 __attribute__ ((format (printf, 2, 3)))
377 static inline int __error_on(int condition, const char *fmt, ...)
384 fputs("ERROR: ", stderr);
386 vfprintf(stderr, fmt, args);
393 /* Pseudo random number generator wrappers */
396 static inline int rand_int(void)
398 return (int)(rand_u32());
401 static inline u64 rand_u64(void)
411 static inline u16 rand_u16(void)
413 return (u16)(rand_u32());
416 static inline u8 rand_u8(void)
418 return (u8)(rand_u32());
421 /* Return random number in range [0, limit) */
422 unsigned int rand_range(unsigned int upper);
424 /* Also allow setting the seed manually */
425 void init_rand_seed(u64 seed);