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* Authors: Kent Overstreet <>
* Gabriel de Perthuis <>
* Jacob Malevich <>
* GPLv2
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <inttypes.h>
#include <limits.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "cmds.h"
static void usage(void)
puts("bcachefs - tool for managing bcachefs filesystems\n"
"usage: bcachefs <command> [<args>]\n"
"Superblock commands:\n"
" format Format a new filesystem\n"
" show-super Dump superblock information to stdout\n"
" fsck Check an existing filesystem for errors\n"
"Startup/shutdown, assembly of multi device filesystems:\n"
#if 0
" assemble Assemble an existing multi device filesystem\n"
" incremental Incrementally assemble an existing multi device filesystem\n"
" run Start a partially assembled filesystem\n"
" stop Stop a running filesystem\n"
"Commands for managing a running filesystem:\n"
" fs usage Show disk usage\n"
"Commands for managing devices within a running filesystem:\n"
" device add Add a new device to an existing filesystem\n"
" device remove Remove a device from an existing filesystem\n"
" device online Re-add an existing member to a filesystem\n"
" device offline Take a device offline, without removing it\n"
" device evacuate Migrate data off of a specific device\n"
" device set-state Mark a device as failed\n"
" device resize Resize filesystem on a device\n"
"Commands for managing filesystem data:\n"
" data rereplicate Rereplicate degraded data\n"
" unlock Unlock an encrypted filesystem prior to running/mounting\n"
" set-passphrase Change passphrase on an existing (unmounted) filesystem\n"
" remove-passphrase Remove passphrase on an existing (unmounted) filesystem\n"
" migrate Migrate an existing filesystem to bcachefs, in place\n"
" migrate-superblock Add default superblock, after bcachefs migrate\n"
"These commands work on offline, unmounted filesystems\n"
" dump Dump filesystem metadata to a qcow2 image\n"
" list List filesystem metadata in textual form\n"
" version Display the version of the invoked bcachefs tool\n");
static char *full_cmd;
static char *pop_cmd(int *argc, char *argv[])
if (*argc < 2) {
printf("%s: missing command\n", argv[0]);
char *cmd = argv[1];
memmove(&argv[1], &argv[2], *argc * sizeof(argv[0]));
full_cmd = mprintf("%s %s", full_cmd, cmd);
return cmd;
static int fs_cmds(int argc, char *argv[])
char *cmd = pop_cmd(&argc, argv);
if (!strcmp(cmd, "usage"))
return cmd_fs_usage(argc, argv);
return 0;
static int device_cmds(int argc, char *argv[])
char *cmd = pop_cmd(&argc, argv);
if (!strcmp(cmd, "add"))
return cmd_device_add(argc, argv);
if (!strcmp(cmd, "remove"))
return cmd_device_remove(argc, argv);
if (!strcmp(cmd, "online"))
return cmd_device_online(argc, argv);
if (!strcmp(cmd, "offline"))
return cmd_device_offline(argc, argv);
if (!strcmp(cmd, "evacuate"))
return cmd_device_evacuate(argc, argv);
if (!strcmp(cmd, "set-state"))
return cmd_device_set_state(argc, argv);
if (!strcmp(cmd, "resize"))
return cmd_device_resize(argc, argv);
return 0;
static int data_cmds(int argc, char *argv[])
char *cmd = pop_cmd(&argc, argv);
if (!strcmp(cmd, "rereplicate"))
return cmd_data_rereplicate(argc, argv);
return 0;
int main(int argc, char *argv[])
full_cmd = argv[0];
setvbuf(stdout, NULL, _IOLBF, 0);
char *cmd = pop_cmd(&argc, argv);
if (!strcmp(cmd, "version"))
return cmd_version(argc, argv);
if (!strcmp(cmd, "format"))
return cmd_format(argc, argv);
if (!strcmp(cmd, "show-super"))
return cmd_show_super(argc, argv);
if (!strcmp(cmd, "fsck"))
return cmd_fsck(argc, argv);
#if 0
if (!strcmp(cmd, "assemble"))
return cmd_assemble(argc, argv);
if (!strcmp(cmd, "incremental"))
return cmd_incremental(argc, argv);
if (!strcmp(cmd, "run"))
return cmd_run(argc, argv);
if (!strcmp(cmd, "stop"))
return cmd_stop(argc, argv);
if (!strcmp(cmd, "fs"))
return fs_cmds(argc, argv);
if (!strcmp(cmd, "device"))
return device_cmds(argc, argv);
if (!strcmp(cmd, "data"))
return data_cmds(argc, argv);
if (!strcmp(cmd, "unlock"))
return cmd_unlock(argc, argv);
if (!strcmp(cmd, "set-passphrase"))
return cmd_set_passphrase(argc, argv);
if (!strcmp(cmd, "remove-passphrase"))
return cmd_remove_passphrase(argc, argv);
if (!strcmp(cmd, "migrate"))
return cmd_migrate(argc, argv);
if (!strcmp(cmd, "migrate-superblock"))
return cmd_migrate_superblock(argc, argv);
if (!strcmp(cmd, "dump"))
return cmd_dump(argc, argv);
if (!strcmp(cmd, "list"))
return cmd_list(argc, argv);
printf("Unknown command %s\n", cmd);