248 lines
8.0 KiB
C
248 lines
8.0 KiB
C
/*
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* Copyright (C) 2007 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#ifndef __BTRFS_UTILS_H__
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#define __BTRFS_UTILS_H__
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#include <sys/stat.h>
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#include "ctree.h"
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#include <dirent.h>
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#define BTRFS_MKFS_SYSTEM_GROUP_SIZE (4 * 1024 * 1024)
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#define BTRFS_MKFS_SMALL_VOLUME_SIZE (1024 * 1024 * 1024)
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#define BTRFS_MKFS_DEFAULT_NODE_SIZE 16384
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#define BTRFS_MKFS_DEFAULT_FEATURES \
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(BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF \
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| BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)
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/*
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* Avoid multi-device features (RAID56) and mixed block groups
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*/
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#define BTRFS_CONVERT_ALLOWED_FEATURES \
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(BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF \
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| BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL \
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| BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO \
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| BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 \
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| BTRFS_FEATURE_INCOMPAT_BIG_METADATA \
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| BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF \
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| BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA \
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| BTRFS_FEATURE_INCOMPAT_NO_HOLES)
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#define BTRFS_FEATURE_LIST_ALL (1ULL << 63)
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#define BTRFS_SCAN_MOUNTED (1ULL << 0)
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#define BTRFS_SCAN_LBLKID (1ULL << 1)
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#define BTRFS_UPDATE_KERNEL 1
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#define BTRFS_ARG_UNKNOWN 0
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#define BTRFS_ARG_MNTPOINT 1
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#define BTRFS_ARG_UUID 2
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#define BTRFS_ARG_BLKDEV 3
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#define BTRFS_ARG_REG 4
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#define BTRFS_UUID_UNPARSED_SIZE 37
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#define ARGV0_BUF_SIZE PATH_MAX
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#define GETOPT_VAL_SI 256
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#define GETOPT_VAL_IEC 257
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#define GETOPT_VAL_RAW 258
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#define GETOPT_VAL_HUMAN_READABLE 259
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#define GETOPT_VAL_KBYTES 260
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#define GETOPT_VAL_MBYTES 261
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#define GETOPT_VAL_GBYTES 262
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#define GETOPT_VAL_TBYTES 263
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#define GETOPT_VAL_HELP 270
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int check_argc_exact(int nargs, int expected);
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int check_argc_min(int nargs, int expected);
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int check_argc_max(int nargs, int expected);
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void fixup_argv0(char **argv, const char *token);
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void set_argv0(char **argv);
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/*
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* Output modes of size
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*/
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#define UNITS_RESERVED (0)
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#define UNITS_BYTES (1)
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#define UNITS_KBYTES (2)
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#define UNITS_MBYTES (3)
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#define UNITS_GBYTES (4)
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#define UNITS_TBYTES (5)
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#define UNITS_RAW (1U << UNITS_MODE_SHIFT)
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#define UNITS_BINARY (2U << UNITS_MODE_SHIFT)
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#define UNITS_DECIMAL (3U << UNITS_MODE_SHIFT)
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#define UNITS_MODE_MASK ((1U << UNITS_MODE_SHIFT) - 1)
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#define UNITS_MODE_SHIFT (8)
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#define UNITS_HUMAN_BINARY (UNITS_BINARY)
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#define UNITS_HUMAN_DECIMAL (UNITS_DECIMAL)
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#define UNITS_HUMAN (UNITS_HUMAN_BINARY)
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#define UNITS_DEFAULT (UNITS_HUMAN)
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void units_set_mode(unsigned *units, unsigned mode);
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void units_set_base(unsigned *units, unsigned base);
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void btrfs_list_all_fs_features(u64 mask_disallowed);
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char* btrfs_parse_fs_features(char *namelist, u64 *flags);
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void btrfs_process_fs_features(u64 flags);
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void btrfs_parse_features_to_string(char *buf, u64 flags);
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struct btrfs_mkfs_config {
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char *label;
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char *fs_uuid;
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u64 blocks[8];
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u64 num_bytes;
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u32 nodesize;
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u32 sectorsize;
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u32 stripesize;
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u64 features;
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};
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int make_btrfs(int fd, struct btrfs_mkfs_config *cfg);
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int btrfs_make_root_dir(struct btrfs_trans_handle *trans,
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struct btrfs_root *root, u64 objectid);
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int btrfs_prepare_device(int fd, char *file, int zero_end, u64 *block_count_ret,
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u64 max_block_count, int *mixed, int discard);
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int btrfs_add_to_fsid(struct btrfs_trans_handle *trans,
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struct btrfs_root *root, int fd, char *path,
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u64 block_count, u32 io_width, u32 io_align,
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u32 sectorsize);
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int btrfs_scan_for_fsid(int run_ioctls);
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int btrfs_register_one_device(const char *fname);
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int btrfs_register_all_devices(void);
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char *canonicalize_dm_name(const char *ptname);
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char *canonicalize_path(const char *path);
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int check_mounted(const char *devicename);
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int check_mounted_where(int fd, const char *file, char *where, int size,
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struct btrfs_fs_devices **fs_devices_mnt);
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int btrfs_device_already_in_root(struct btrfs_root *root, int fd,
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int super_offset);
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int pretty_size_snprintf(u64 size, char *str, size_t str_bytes, unsigned unit_mode);
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#define pretty_size(size) pretty_size_mode(size, UNITS_DEFAULT)
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const char *pretty_size_mode(u64 size, unsigned mode);
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int get_mountpt(char *dev, char *mntpt, size_t size);
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u64 parse_size(char *s);
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u64 parse_qgroupid(const char *p);
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u64 arg_strtou64(const char *str);
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int arg_copy_path(char *dest, const char *src, int destlen);
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int open_file_or_dir(const char *fname, DIR **dirstream);
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int open_file_or_dir3(const char *fname, DIR **dirstream, int open_flags);
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void close_file_or_dir(int fd, DIR *dirstream);
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int get_fs_info(char *path, struct btrfs_ioctl_fs_info_args *fi_args,
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struct btrfs_ioctl_dev_info_args **di_ret);
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int get_label(const char *btrfs_dev, char *label);
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int set_label(const char *btrfs_dev, const char *label);
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char *__strncpy__null(char *dest, const char *src, size_t n);
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int is_block_device(const char *file);
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int is_mount_point(const char *file);
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int check_arg_type(const char *input);
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int open_path_or_dev_mnt(const char *path, DIR **dirstream);
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u64 btrfs_device_size(int fd, struct stat *st);
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/* Helper to always get proper size of the destination string */
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#define strncpy_null(dest, src) __strncpy__null(dest, src, sizeof(dest))
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int test_dev_for_mkfs(char *file, int force_overwrite);
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int get_label_mounted(const char *mount_path, char *labelp);
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int test_num_disk_vs_raid(u64 metadata_profile, u64 data_profile,
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u64 dev_cnt, int mixed);
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int group_profile_max_safe_loss(u64 flags);
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int is_vol_small(char *file);
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int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
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int verify);
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int ask_user(char *question);
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int lookup_ino_rootid(int fd, u64 *rootid);
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int btrfs_scan_lblkid(void);
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int get_btrfs_mount(const char *dev, char *mp, size_t mp_size);
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int find_mount_root(const char *path, char **mount_root);
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int get_device_info(int fd, u64 devid,
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struct btrfs_ioctl_dev_info_args *di_args);
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int test_uuid_unique(char *fs_uuid);
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u64 disk_size(char *path);
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int get_device_info(int fd, u64 devid,
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struct btrfs_ioctl_dev_info_args *di_args);
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u64 get_partition_size(char *dev);
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const char* group_type_str(u64 flags);
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const char* group_profile_str(u64 flags);
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int test_minimum_size(const char *file, u32 leafsize);
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int test_issubvolname(const char *name);
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int test_isdir(const char *path);
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/*
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* Btrfs minimum size calculation is complicated, it should include at least:
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* 1. system group size
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* 2. minimum global block reserve
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* 3. metadata used at mkfs
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* 4. space reservation to create uuid for first mount.
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* Also, raid factor should also be taken into consideration.
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* To avoid the overkill calculation, (system group + global block rsv) * 2
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* for *EACH* device should be good enough.
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*/
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static inline u64 btrfs_min_global_blk_rsv_size(u32 leafsize)
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{
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return leafsize << 10;
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}
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static inline u64 btrfs_min_dev_size(u32 leafsize)
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{
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return 2 * (BTRFS_MKFS_SYSTEM_GROUP_SIZE +
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btrfs_min_global_blk_rsv_size(leafsize));
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}
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int find_next_key(struct btrfs_path *path, struct btrfs_key *key);
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char* btrfs_group_type_str(u64 flag);
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char* btrfs_group_profile_str(u64 flag);
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/*
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* Get the length of the string converted from a u64 number.
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*
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* Result is equal to log10(num) + 1, but without the use of math library.
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*/
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static inline int count_digits(u64 num)
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{
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int ret = 0;
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if (num == 0)
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return 1;
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while (num > 0) {
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ret++;
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num /= 10;
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}
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return ret;
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}
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static inline u64 div_factor(u64 num, int factor)
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{
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if (factor == 10)
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return num;
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num *= factor;
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num /= 10;
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return num;
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}
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int btrfs_tree_search2_ioctl_supported(int fd);
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int btrfs_check_nodesize(u32 nodesize, u32 sectorsize);
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const char *get_argv0_buf(void);
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#endif
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