155 lines
4.8 KiB
C
155 lines
4.8 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 "kerncompat.h"
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#include <stdbool.h>
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#include <stddef.h>
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#include "kernel-lib/list.h"
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#include "kernel-shared/volumes.h"
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#include "common/fsfeatures.h"
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struct list_head;
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enum exclusive_operation {
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BTRFS_EXCLOP_NONE,
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BTRFS_EXCLOP_BALANCE,
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BTRFS_EXCLOP_BALANCE_PAUSED,
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BTRFS_EXCLOP_DEV_ADD,
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BTRFS_EXCLOP_DEV_REMOVE,
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BTRFS_EXCLOP_DEV_REPLACE,
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BTRFS_EXCLOP_RESIZE,
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BTRFS_EXCLOP_SWAP_ACTIVATE,
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BTRFS_EXCLOP_UNKNOWN = -1,
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};
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/* 2 for "0x", 2 for each byte, plus nul */
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#define BTRFS_CSUM_STRING_LEN (2 + 2 * BTRFS_CSUM_SIZE + 1)
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void btrfs_format_csum(u16 csum_type, const u8 *data, char *output);
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int get_fs_info(const 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_fsid(const char *path, u8 *fsid, int silent);
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int get_fsid_fd(int fd, u8 *fsid);
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int get_fs_exclop(int fd);
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int check_running_fs_exclop(int fd, enum exclusive_operation start, bool enqueue);
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const char *get_fs_exclop_name(int op);
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int check_arg_type(const char *input);
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int ask_user(const char *question);
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int lookup_path_rootid(int fd, u64 *rootid);
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int find_mount_fsroot(const char *subvol, const char *subvolid, char **mount);
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int find_mount_root(const char *path, char **mount_root);
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int get_df(int fd, struct btrfs_ioctl_space_args **sargs_ret);
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const char *subvol_strip_mountpoint(const char *mnt, const char *full_path);
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int find_next_key(struct btrfs_path *path, struct btrfs_key *key);
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const char* btrfs_group_type_str(u64 flag);
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const char* btrfs_group_profile_str(u64 flag);
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int count_digits(u64 num);
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u64 div_factor(u64 num, int factor);
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unsigned long total_memory(void);
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void print_device_info(struct btrfs_device *device, char *prefix);
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void print_all_devices(struct list_head *devices);
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#define BTRFS_BCONF_UNSET -1
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#define BTRFS_BCONF_QUIET 0
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/*
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* Global program state, configurable by command line and available to
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* functions without extra context passing.
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*/
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struct btrfs_config {
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unsigned int output_format;
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/*
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* Values:
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* BTRFS_BCONF_QUIET
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* BTRFS_BCONF_UNSET
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* > 0: verbose level
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*/
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int verbose;
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/* Command line request to skip any modification actions. */
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int dry_run;
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struct list_head params;
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};
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extern struct btrfs_config bconf;
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struct config_param {
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struct list_head list;
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const char *key;
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const char *value;
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};
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void btrfs_config_init(void);
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void bconf_be_verbose(void);
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void bconf_be_quiet(void);
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void bconf_add_param(const char *key, const char *value);
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void bconf_save_param(const char *str);
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void bconf_set_dry_run(void);
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bool bconf_is_dry_run(void);
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const char *bconf_param_value(const char *key);
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/* Pseudo random number generator wrappers */
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int rand_int(void);
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u8 rand_u8(void);
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u16 rand_u16(void);
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u32 rand_u32(void);
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u64 rand_u64(void);
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unsigned int rand_range(unsigned int upper);
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void init_rand_seed(u64 seed);
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char *btrfs_test_for_multiple_profiles(int fd);
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int btrfs_warn_multiple_profiles(int fd);
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void btrfs_warn_experimental(const char *str);
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/* An error code to error string mapping for the kernel error codes */
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static inline char *btrfs_err_str(enum btrfs_err_code err_code)
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{
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switch (err_code) {
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case BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET:
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return "unable to go below two devices on raid1";
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case BTRFS_ERROR_DEV_RAID1C3_MIN_NOT_MET:
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return "unable to go below three devices on raid1c3";
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case BTRFS_ERROR_DEV_RAID1C4_MIN_NOT_MET:
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return "unable to go below four devices on raid1c4";
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case BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET:
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return "unable to go below four/two devices on raid10";
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case BTRFS_ERROR_DEV_RAID5_MIN_NOT_MET:
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return "unable to go below two devices on raid5";
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case BTRFS_ERROR_DEV_RAID6_MIN_NOT_MET:
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return "unable to go below three devices on raid6";
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case BTRFS_ERROR_DEV_TGT_REPLACE:
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return "unable to remove the dev_replace target dev";
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case BTRFS_ERROR_DEV_MISSING_NOT_FOUND:
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return "no missing devices found to remove";
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case BTRFS_ERROR_DEV_ONLY_WRITABLE:
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return "unable to remove the only writeable device";
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case BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS:
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return "add/delete/balance/replace/resize operation "
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"in progress";
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default:
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return NULL;
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}
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}
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#endif
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