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 #define BTRFS_MKFS_SYSTEM_GROUP_SIZE (4 * 1024 * 1024)
27 #define BTRFS_MKFS_SMALL_VOLUME_SIZE (1024 * 1024 * 1024)
28 #define BTRFS_MKFS_DEFAULT_NODE_SIZE 16384
29 #define BTRFS_MKFS_DEFAULT_FEATURES \
30 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF \
31 | BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)
34 * Avoid multi-device features (RAID56) and mixed block groups
36 #define BTRFS_CONVERT_ALLOWED_FEATURES \
37 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF \
38 | BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL \
39 | BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO \
40 | BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 \
41 | BTRFS_FEATURE_INCOMPAT_BIG_METADATA \
42 | BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF \
43 | BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA \
44 | BTRFS_FEATURE_INCOMPAT_NO_HOLES)
46 #define BTRFS_FEATURE_LIST_ALL (1ULL << 63)
48 #define BTRFS_SCAN_MOUNTED (1ULL << 0)
49 #define BTRFS_SCAN_LBLKID (1ULL << 1)
51 #define BTRFS_UPDATE_KERNEL 1
53 #define BTRFS_ARG_UNKNOWN 0
54 #define BTRFS_ARG_MNTPOINT 1
55 #define BTRFS_ARG_UUID 2
56 #define BTRFS_ARG_BLKDEV 3
57 #define BTRFS_ARG_REG 4
59 #define BTRFS_UUID_UNPARSED_SIZE 37
61 #define ARGV0_BUF_SIZE PATH_MAX
63 #define GETOPT_VAL_SI 256
64 #define GETOPT_VAL_IEC 257
65 #define GETOPT_VAL_RAW 258
66 #define GETOPT_VAL_HUMAN_READABLE 259
67 #define GETOPT_VAL_KBYTES 260
68 #define GETOPT_VAL_MBYTES 261
69 #define GETOPT_VAL_GBYTES 262
70 #define GETOPT_VAL_TBYTES 263
72 #define GETOPT_VAL_HELP 270
74 int check_argc_exact(int nargs, int expected);
75 int check_argc_min(int nargs, int expected);
76 int check_argc_max(int nargs, int expected);
78 void fixup_argv0(char **argv, const char *token);
79 void set_argv0(char **argv);
82 * Output modes of size
84 #define UNITS_RESERVED (0)
85 #define UNITS_BYTES (1)
86 #define UNITS_KBYTES (2)
87 #define UNITS_MBYTES (3)
88 #define UNITS_GBYTES (4)
89 #define UNITS_TBYTES (5)
90 #define UNITS_RAW (1U << UNITS_MODE_SHIFT)
91 #define UNITS_BINARY (2U << UNITS_MODE_SHIFT)
92 #define UNITS_DECIMAL (3U << UNITS_MODE_SHIFT)
93 #define UNITS_MODE_MASK ((1U << UNITS_MODE_SHIFT) - 1)
94 #define UNITS_MODE_SHIFT (8)
95 #define UNITS_HUMAN_BINARY (UNITS_BINARY)
96 #define UNITS_HUMAN_DECIMAL (UNITS_DECIMAL)
97 #define UNITS_HUMAN (UNITS_HUMAN_BINARY)
98 #define UNITS_DEFAULT (UNITS_HUMAN)
100 void units_set_mode(unsigned *units, unsigned mode);
101 void units_set_base(unsigned *units, unsigned base);
103 void btrfs_list_all_fs_features(u64 mask_disallowed);
104 char* btrfs_parse_fs_features(char *namelist, u64 *flags);
105 void btrfs_process_fs_features(u64 flags);
106 void btrfs_parse_features_to_string(char *buf, u64 flags);
108 int make_btrfs(int fd, const char *device, const char *label,
109 char *fs_uuid, u64 blocks[6], u64 num_bytes, u32 nodesize,
110 u32 sectorsize, u32 stripesize, u64 features);
111 int btrfs_make_root_dir(struct btrfs_trans_handle *trans,
112 struct btrfs_root *root, u64 objectid);
113 int btrfs_prepare_device(int fd, char *file, int zero_end, u64 *block_count_ret,
114 u64 max_block_count, int *mixed, int discard);
115 int btrfs_add_to_fsid(struct btrfs_trans_handle *trans,
116 struct btrfs_root *root, int fd, char *path,
117 u64 block_count, u32 io_width, u32 io_align,
119 int btrfs_scan_for_fsid(int run_ioctls);
120 int btrfs_register_one_device(const char *fname);
121 int btrfs_register_all_devices(void);
122 char *canonicalize_dm_name(const char *ptname);
123 char *canonicalize_path(const char *path);
124 int check_mounted(const char *devicename);
125 int check_mounted_where(int fd, const char *file, char *where, int size,
126 struct btrfs_fs_devices **fs_devices_mnt);
127 int btrfs_device_already_in_root(struct btrfs_root *root, int fd,
130 int pretty_size_snprintf(u64 size, char *str, size_t str_bytes, unsigned unit_mode);
131 #define pretty_size(size) pretty_size_mode(size, UNITS_DEFAULT)
132 const char *pretty_size_mode(u64 size, unsigned mode);
134 int get_mountpt(char *dev, char *mntpt, size_t size);
135 u64 parse_size(char *s);
136 u64 parse_qgroupid(const char *p);
137 u64 arg_strtou64(const char *str);
138 int arg_copy_path(char *dest, const char *src, int destlen);
139 int open_file_or_dir(const char *fname, DIR **dirstream);
140 int open_file_or_dir3(const char *fname, DIR **dirstream, int open_flags);
141 void close_file_or_dir(int fd, DIR *dirstream);
142 int get_fs_info(char *path, struct btrfs_ioctl_fs_info_args *fi_args,
143 struct btrfs_ioctl_dev_info_args **di_ret);
144 int get_label(const char *btrfs_dev, char *label);
145 int set_label(const char *btrfs_dev, const char *label);
147 char *__strncpy__null(char *dest, const char *src, size_t n);
148 int is_block_device(const char *file);
149 int is_mount_point(const char *file);
150 int check_arg_type(const char *input);
151 int open_path_or_dev_mnt(const char *path, DIR **dirstream);
152 u64 btrfs_device_size(int fd, struct stat *st);
153 /* Helper to always get proper size of the destination string */
154 #define strncpy_null(dest, src) __strncpy__null(dest, src, sizeof(dest))
155 int test_dev_for_mkfs(char *file, int force_overwrite);
156 int get_label_mounted(const char *mount_path, char *labelp);
157 int test_num_disk_vs_raid(u64 metadata_profile, u64 data_profile,
158 u64 dev_cnt, int mixed);
159 int group_profile_max_safe_loss(u64 flags);
160 int is_vol_small(char *file);
161 int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
163 int ask_user(char *question);
164 int lookup_ino_rootid(int fd, u64 *rootid);
165 int btrfs_scan_lblkid(void);
166 int get_btrfs_mount(const char *dev, char *mp, size_t mp_size);
167 int find_mount_root(const char *path, char **mount_root);
168 int get_device_info(int fd, u64 devid,
169 struct btrfs_ioctl_dev_info_args *di_args);
170 int test_uuid_unique(char *fs_uuid);
171 u64 disk_size(char *path);
172 int get_device_info(int fd, u64 devid,
173 struct btrfs_ioctl_dev_info_args *di_args);
174 u64 get_partition_size(char *dev);
175 const char* group_type_str(u64 flags);
176 const char* group_profile_str(u64 flags);
178 int test_minimum_size(const char *file, u32 leafsize);
179 int test_issubvolname(const char *name);
180 int test_isdir(const char *path);
183 * Btrfs minimum size calculation is complicated, it should include at least:
184 * 1. system group size
185 * 2. minimum global block reserve
186 * 3. metadata used at mkfs
187 * 4. space reservation to create uuid for first mount.
188 * Also, raid factor should also be taken into consideration.
189 * To avoid the overkill calculation, (system group + global block rsv) * 2
190 * for *EACH* device should be good enough.
192 static inline u64 btrfs_min_global_blk_rsv_size(u32 leafsize)
194 return leafsize << 10;
196 static inline u64 btrfs_min_dev_size(u32 leafsize)
198 return 2 * (BTRFS_MKFS_SYSTEM_GROUP_SIZE +
199 btrfs_min_global_blk_rsv_size(leafsize));
202 int find_next_key(struct btrfs_path *path, struct btrfs_key *key);
203 char* btrfs_group_type_str(u64 flag);
204 char* btrfs_group_profile_str(u64 flag);
207 * Get the length of the string converted from a u64 number.
209 * Result is equal to log10(num) + 1, but without the use of math library.
211 static inline int count_digits(u64 num)
224 static inline u64 div_factor(u64 num, int factor)
233 int btrfs_tree_search2_ioctl_supported(int fd);
234 int btrfs_check_nodesize(u32 nodesize, u32 sectorsize);
236 const char *get_argv0_buf(void);