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