| /* |
| * Copyright (C) 2007 Oracle. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public |
| * License v2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public |
| * License along with this program; if not, write to the |
| * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| * Boston, MA 021110-1307, USA. |
| */ |
| |
| #ifndef __BTRFS_UTILS_H__ |
| #define __BTRFS_UTILS_H__ |
| |
| #include <sys/stat.h> |
| #include "ctree.h" |
| #include <dirent.h> |
| |
| #define BTRFS_MKFS_SYSTEM_GROUP_SIZE (4 * 1024 * 1024) |
| #define BTRFS_MKFS_SMALL_VOLUME_SIZE (1024 * 1024 * 1024) |
| |
| #define BTRFS_SCAN_MOUNTED (1ULL << 0) |
| #define BTRFS_SCAN_LBLKID (1ULL << 1) |
| |
| #define BTRFS_UPDATE_KERNEL 1 |
| |
| #define BTRFS_ARG_UNKNOWN 0 |
| #define BTRFS_ARG_MNTPOINT 1 |
| #define BTRFS_ARG_UUID 2 |
| #define BTRFS_ARG_BLKDEV 3 |
| #define BTRFS_ARG_REG 4 |
| |
| #define BTRFS_UUID_UNPARSED_SIZE 37 |
| |
| #define ARGV0_BUF_SIZE PATH_MAX |
| |
| #define GETOPT_VAL_SI 256 |
| #define GETOPT_VAL_IEC 257 |
| #define GETOPT_VAL_RAW 258 |
| #define GETOPT_VAL_HUMAN_READABLE 259 |
| #define GETOPT_VAL_KBYTES 260 |
| #define GETOPT_VAL_MBYTES 261 |
| #define GETOPT_VAL_GBYTES 262 |
| #define GETOPT_VAL_TBYTES 263 |
| |
| int check_argc_exact(int nargs, int expected); |
| int check_argc_min(int nargs, int expected); |
| int check_argc_max(int nargs, int expected); |
| |
| void fixup_argv0(char **argv, const char *token); |
| void set_argv0(char **argv); |
| |
| /* |
| * Output modes of size |
| */ |
| #define UNITS_RESERVED (0) |
| #define UNITS_BYTES (1) |
| #define UNITS_KBYTES (2) |
| #define UNITS_MBYTES (3) |
| #define UNITS_GBYTES (4) |
| #define UNITS_TBYTES (5) |
| #define UNITS_RAW (1U << UNITS_MODE_SHIFT) |
| #define UNITS_BINARY (2U << UNITS_MODE_SHIFT) |
| #define UNITS_DECIMAL (3U << UNITS_MODE_SHIFT) |
| #define UNITS_MODE_MASK ((1U << UNITS_MODE_SHIFT) - 1) |
| #define UNITS_MODE_SHIFT (8) |
| #define UNITS_HUMAN_BINARY (UNITS_BINARY) |
| #define UNITS_HUMAN_DECIMAL (UNITS_DECIMAL) |
| #define UNITS_HUMAN (UNITS_HUMAN_BINARY) |
| #define UNITS_DEFAULT (UNITS_HUMAN) |
| |
| void units_set_mode(unsigned *units, unsigned mode); |
| void units_set_base(unsigned *units, unsigned base); |
| |
| int make_btrfs(int fd, const char *device, const char *label, |
| char *fs_uuid, u64 blocks[6], u64 num_bytes, u32 nodesize, |
| u32 leafsize, u32 sectorsize, u32 stripesize, u64 features); |
| int btrfs_make_root_dir(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, u64 objectid); |
| int btrfs_prepare_device(int fd, char *file, int zero_end, u64 *block_count_ret, |
| u64 max_block_count, int *mixed, int discard); |
| int btrfs_add_to_fsid(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, int fd, char *path, |
| u64 block_count, u32 io_width, u32 io_align, |
| u32 sectorsize); |
| int btrfs_scan_for_fsid(int run_ioctls); |
| int btrfs_register_one_device(const char *fname); |
| int btrfs_register_all_devices(void); |
| char *canonicalize_dm_name(const char *ptname); |
| char *canonicalize_path(const char *path); |
| int check_mounted(const char *devicename); |
| int check_mounted_where(int fd, const char *file, char *where, int size, |
| struct btrfs_fs_devices **fs_devices_mnt); |
| int btrfs_device_already_in_root(struct btrfs_root *root, int fd, |
| int super_offset); |
| |
| int pretty_size_snprintf(u64 size, char *str, size_t str_bytes, unsigned unit_mode); |
| #define pretty_size(size) pretty_size_mode(size, UNITS_DEFAULT) |
| #define pretty_size_mode(size, mode) \ |
| ({ \ |
| static __thread char _str[32]; \ |
| (void)pretty_size_snprintf((size), _str, sizeof(_str), (mode)); \ |
| _str; \ |
| }) |
| |
| int get_mountpt(char *dev, char *mntpt, size_t size); |
| int btrfs_scan_block_devices(int run_ioctl); |
| u64 parse_size(char *s); |
| u64 arg_strtou64(const char *str); |
| int open_file_or_dir(const char *fname, DIR **dirstream); |
| int open_file_or_dir3(const char *fname, DIR **dirstream, int open_flags); |
| void close_file_or_dir(int fd, DIR *dirstream); |
| int get_fs_info(char *path, struct btrfs_ioctl_fs_info_args *fi_args, |
| struct btrfs_ioctl_dev_info_args **di_ret); |
| int get_label(const char *btrfs_dev, char *label); |
| int set_label(const char *btrfs_dev, const char *label); |
| |
| char *__strncpy__null(char *dest, const char *src, size_t n); |
| int is_block_device(const char *file); |
| int is_mount_point(const char *file); |
| int check_arg_type(const char *input); |
| int open_path_or_dev_mnt(const char *path, DIR **dirstream); |
| u64 btrfs_device_size(int fd, struct stat *st); |
| /* Helper to always get proper size of the destination string */ |
| #define strncpy_null(dest, src) __strncpy__null(dest, src, sizeof(dest)) |
| int test_dev_for_mkfs(char *file, int force_overwrite, char *estr); |
| int get_label_mounted(const char *mount_path, char *labelp); |
| int test_num_disk_vs_raid(u64 metadata_profile, u64 data_profile, |
| u64 dev_cnt, int mixed, char *estr); |
| int is_vol_small(char *file); |
| int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, |
| int verify); |
| int ask_user(char *question); |
| int lookup_ino_rootid(int fd, u64 *rootid); |
| int btrfs_scan_lblkid(void); |
| int get_btrfs_mount(const char *dev, char *mp, size_t mp_size); |
| int find_mount_root(const char *path, char **mount_root); |
| int get_device_info(int fd, u64 devid, |
| struct btrfs_ioctl_dev_info_args *di_args); |
| int test_uuid_unique(char *fs_uuid); |
| u64 disk_size(char *path); |
| int get_device_info(int fd, u64 devid, |
| struct btrfs_ioctl_dev_info_args *di_args); |
| u64 get_partition_size(char *dev); |
| const char* group_type_str(u64 flags); |
| const char* group_profile_str(u64 flags); |
| |
| int test_minimum_size(const char *file, u32 leafsize); |
| int test_issubvolname(const char *name); |
| int test_isdir(const char *path); |
| |
| /* |
| * Btrfs minimum size calculation is complicated, it should include at least: |
| * 1. system group size |
| * 2. minimum global block reserve |
| * 3. metadata used at mkfs |
| * 4. space reservation to create uuid for first mount. |
| * Also, raid factor should also be taken into consideration. |
| * To avoid the overkill calculation, (system group + global block rsv) * 2 |
| * for *EACH* device should be good enough. |
| */ |
| static inline u64 btrfs_min_global_blk_rsv_size(u32 leafsize) |
| { |
| return leafsize << 10; |
| } |
| static inline u64 btrfs_min_dev_size(u32 leafsize) |
| { |
| return 2 * (BTRFS_MKFS_SYSTEM_GROUP_SIZE + |
| btrfs_min_global_blk_rsv_size(leafsize)); |
| } |
| |
| int find_next_key(struct btrfs_path *path, struct btrfs_key *key); |
| char* btrfs_group_type_str(u64 flag); |
| char* btrfs_group_profile_str(u64 flag); |
| |
| /* |
| * Get the length of the string converted from a u64 number. |
| * |
| * Result is equal to log10(num) + 1, but without the use of math library. |
| */ |
| static inline int count_digits(u64 num) |
| { |
| int ret = 0; |
| |
| if (num == 0) |
| return 1; |
| while (num > 0) { |
| ret++; |
| num /= 10; |
| } |
| return ret; |
| } |
| |
| static inline u64 div_factor(u64 num, int factor) |
| { |
| if (factor == 10) |
| return num; |
| num *= factor; |
| num /= 10; |
| return num; |
| } |
| |
| int btrfs_tree_search2_ioctl_supported(int fd); |
| |
| #endif |