static int cmd_balance_cancel(int argc, char **argv)
{
const char *path;
int fd;
int ret;
int e;
DIR *dirstream = NULL;
clean_args_no_options(argc, argv, cmd_balance_cancel_usage);
if (check_argc_exact(argc - optind, 1))
usage(cmd_balance_cancel_usage);
path = argv[optind];
fd = btrfs_open_dir(path, &dirstream, 1);
if (fd < 0)
return 1;
ret = ioctl(fd, BTRFS_IOC_BALANCE_CTL, BTRFS_BALANCE_CTL_CANCEL);
e = errno;
close_file_or_dir(fd, dirstream);
if (ret < 0) {
error("balance cancel on '%s' failed: %s", path,
(e == ENOTCONN) ? "Not in progress" : strerror(e));
if (e == ENOTCONN)
return 2;
else
return 1;
}
return 0;
}
static int cmd_balance_pause(int argc, char **argv)
{
const char *path;
int fd;
int ret;
DIR *dirstream = NULL;
clean_args_no_options(argc, argv, cmd_balance_pause_usage);
if (check_argc_exact(argc - optind, 1))
return 1;
path = argv[optind];
fd = btrfs_open_dir(path, &dirstream, 1);
if (fd < 0)
return 1;
ret = ioctl(fd, BTRFS_IOC_BALANCE_CTL, BTRFS_BALANCE_CTL_PAUSE);
if (ret < 0) {
error("balance pause on '%s' failed: %s", path,
(errno == ENOTCONN) ? "Not running" : strerror(errno));
if (errno == ENOTCONN)
ret = 2;
else
ret = 1;
}
close_file_or_dir(fd, dirstream);
return ret;
}
static int cmd_inspect_rootid(int argc, char **argv)
{
int ret;
int fd = -1;
u64 rootid;
DIR *dirstream = NULL;
clean_args_no_options(argc, argv, cmd_inspect_rootid_usage);
if (check_argc_exact(argc - optind, 1))
usage(cmd_inspect_rootid_usage);
fd = btrfs_open_dir(argv[optind], &dirstream, 1);
if (fd < 0) {
ret = -ENOENT;
goto out;
}
ret = lookup_ino_rootid(fd, &rootid);
if (ret) {
error("rootid failed with ret=%d", ret);
goto out;
}
printf("%llu\n", (unsigned long long)rootid);
out:
close_file_or_dir(fd, dirstream);
return !!ret;
}
static int cmd_device_usage(int argc, char **argv)
{
unsigned unit_mode;
int ret = 0;
int i;
unit_mode = get_unit_mode_from_arg(&argc, argv, 1);
clean_args_no_options(argc, argv, cmd_device_usage_usage);
if (check_argc_min(argc - optind, 1))
usage(cmd_device_usage_usage);
for (i = optind; i < argc; i++) {
int fd;
DIR *dirstream = NULL;
if (i > 1)
printf("\n");
fd = btrfs_open_dir(argv[i], &dirstream, 1);
if (fd < 0) {
ret = 1;
break;
}
ret = _cmd_device_usage(fd, argv[i], unit_mode);
close_file_or_dir(fd, dirstream);
if (ret)
break;
}
return !!ret;
}
static int cmd_inspect_subvolid_resolve(int argc, char **argv)
{
int ret;
int fd = -1;
u64 subvol_id;
char path[PATH_MAX];
DIR *dirstream = NULL;
clean_args_no_options(argc, argv, cmd_inspect_subvolid_resolve_usage);
if (check_argc_exact(argc - optind, 2))
usage(cmd_inspect_subvolid_resolve_usage);
fd = btrfs_open_dir(argv[optind + 1], &dirstream, 1);
if (fd < 0) {
ret = -ENOENT;
goto out;
}
subvol_id = arg_strtou64(argv[optind]);
ret = btrfs_subvolid_resolve(fd, path, sizeof(path), subvol_id);
if (ret) {
error("resolving subvolid %llu error %d",
(unsigned long long)subvol_id, ret);
goto out;
}
path[PATH_MAX - 1] = '\0';
printf("%s\n", path);
out:
close_file_or_dir(fd, dirstream);
return ret ? 1 : 0;
}
static int cmd_subvol_set_default(int argc, char **argv)
{
int ret=0, fd, e;
u64 objectid;
char *path;
char *subvolid;
DIR *dirstream = NULL;
clean_args_no_options(argc, argv, cmd_subvol_set_default_usage);
if (check_argc_exact(argc - optind, 2))
usage(cmd_subvol_set_default_usage);
subvolid = argv[optind];
path = argv[optind + 1];
objectid = arg_strtou64(subvolid);
fd = btrfs_open_dir(path, &dirstream, 1);
if (fd < 0)
return 1;
ret = ioctl(fd, BTRFS_IOC_DEFAULT_SUBVOL, &objectid);
e = errno;
close_file_or_dir(fd, dirstream);
if (ret < 0) {
error("unable to set a new default subvolume: %s",
strerror(e));
return 1;
}
return 0;
}
static int cmd_subvol_get_default(int argc, char **argv)
{
int fd = -1;
int ret;
char *subvol;
struct btrfs_list_filter_set *filter_set;
u64 default_id;
DIR *dirstream = NULL;
clean_args_no_options(argc, argv, cmd_subvol_get_default_usage);
if (check_argc_exact(argc - optind, 1))
usage(cmd_subvol_get_default_usage);
subvol = argv[1];
fd = btrfs_open_dir(subvol, &dirstream, 1);
if (fd < 0)
return 1;
ret = btrfs_list_get_default_subvolume(fd, &default_id);
if (ret) {
error("failed to look up default subvolume: %s",
strerror(errno));
goto out;
}
ret = 1;
if (default_id == 0) {
error("'default' dir item not found");
goto out;
}
/* no need to resolve roots if FS_TREE is default */
if (default_id == BTRFS_FS_TREE_OBJECTID) {
printf("ID 5 (FS_TREE)\n");
ret = 0;
goto out;
}
filter_set = btrfs_list_alloc_filter_set();
btrfs_list_setup_filter(&filter_set, BTRFS_LIST_FILTER_ROOTID,
default_id);
/* by default we shall print the following columns*/
btrfs_list_setup_print_column(BTRFS_LIST_OBJECTID);
btrfs_list_setup_print_column(BTRFS_LIST_GENERATION);
btrfs_list_setup_print_column(BTRFS_LIST_TOP_LEVEL);
btrfs_list_setup_print_column(BTRFS_LIST_PATH);
ret = btrfs_list_subvols_print(fd, filter_set, NULL,
BTRFS_LIST_LAYOUT_DEFAULT, 1, NULL);
if (filter_set)
free(filter_set);
out:
close_file_or_dir(fd, dirstream);
return !!ret;
}
static int cmd_balance_resume(int argc, char **argv)
{
struct btrfs_ioctl_balance_args args;
const char *path;
DIR *dirstream = NULL;
int fd;
int ret;
int e;
clean_args_no_options(argc, argv, cmd_balance_resume_usage);
if (check_argc_exact(argc - optind, 1))
usage(cmd_balance_resume_usage);
path = argv[optind];
fd = btrfs_open_dir(path, &dirstream, 1);
if (fd < 0)
return 1;
memset(&args, 0, sizeof(args));
args.flags |= BTRFS_BALANCE_RESUME;
ret = ioctl(fd, BTRFS_IOC_BALANCE_V2, &args);
e = errno;
close_file_or_dir(fd, dirstream);
if (ret < 0) {
if (e == ECANCELED) {
if (args.state & BTRFS_BALANCE_STATE_PAUSE_REQ)
fprintf(stderr, "balance paused by user\n");
if (args.state & BTRFS_BALANCE_STATE_CANCEL_REQ)
fprintf(stderr, "balance canceled by user\n");
} else if (e == ENOTCONN || e == EINPROGRESS) {
error("balance resume on '%s' failed: %s", path,
(e == ENOTCONN) ? "Not in progress" :
"Already running");
if (e == ENOTCONN)
return 2;
else
return 1;
} else {
error("error during balancing '%s': %s\n"
"There may be more info in syslog - try dmesg | tail",
path, strerror(e));
return 1;
}
} else {
printf("Done, had to relocate %llu out of %llu chunks\n",
(unsigned long long)args.stat.completed,
(unsigned long long)args.stat.considered);
}
return 0;
}
static int cmd_qgroup_destroy(int argc, char **argv)
{
int ret;
clean_args_no_options(argc, argv, cmd_qgroup_destroy_usage);
ret = _cmd_qgroup_create(0, argc, argv);
if (ret < 0)
usage(cmd_qgroup_destroy_usage);
return ret;
}
static int cmd_quota_disable(int argc, char **argv)
{
int ret;
clean_args_no_options(argc, argv, cmd_quota_disable_usage);
ret = quota_ctl(BTRFS_QUOTA_CTL_DISABLE, argc, argv);
if (ret < 0)
usage(cmd_quota_disable_usage);
return ret;
}
static int cmd_device_ready(int argc, char **argv)
{
struct btrfs_ioctl_vol_args args;
int fd;
int ret;
char *path;
clean_args_no_options(argc, argv, cmd_device_ready_usage);
if (check_argc_exact(argc - optind, 1))
usage(cmd_device_ready_usage);
fd = open("/dev/btrfs-control", O_RDWR);
if (fd < 0) {
perror("failed to open /dev/btrfs-control");
return 1;
}
path = canonicalize_path(argv[optind]);
if (!path) {
error("could not canonicalize pathname '%s': %m",
argv[optind]);
ret = 1;
goto out;
}
if (is_block_device(path) != 1) {
error("not a block device: %s", path);
ret = 1;
goto out;
}
memset(&args, 0, sizeof(args));
strncpy_null(args.name, path);
ret = ioctl(fd, BTRFS_IOC_DEVICES_READY, &args);
if (ret < 0) {
error("unable to determine if device '%s' is ready for mount: %m",
path);
ret = 1;
}
out:
free(path);
close(fd);
return ret;
}
static int cmd_rescue_zero_log(int argc, char **argv)
{
struct btrfs_root *root;
struct btrfs_trans_handle *trans;
struct btrfs_super_block *sb;
char *devname;
int ret;
clean_args_no_options(argc, argv, cmd_rescue_zero_log_usage);
if (check_argc_exact(argc, 2))
usage(cmd_rescue_zero_log_usage);
devname = argv[optind];
ret = check_mounted(devname);
if (ret < 0) {
errno = -ret;
error("could not check mount status: %m");
goto out;
} else if (ret) {
error("%s is currently mounted", devname);
ret = -EBUSY;
goto out;
}
root = open_ctree(devname, 0, OPEN_CTREE_WRITES | OPEN_CTREE_PARTIAL);
if (!root) {
error("could not open ctree");
return 1;
}
sb = root->fs_info->super_copy;
printf("Clearing log on %s, previous log_root %llu, level %u\n",
devname,
(unsigned long long)btrfs_super_log_root(sb),
(unsigned)btrfs_super_log_root_level(sb));
trans = btrfs_start_transaction(root, 1);
BUG_ON(IS_ERR(trans));
btrfs_set_super_log_root(sb, 0);
btrfs_set_super_log_root_level(sb, 0);
btrfs_commit_transaction(trans, root);
close_ctree(root);
out:
return !!ret;
}
static int cmd_subvol_find_new(int argc, char **argv)
{
int fd;
int ret;
char *subvol;
u64 last_gen;
DIR *dirstream = NULL;
clean_args_no_options(argc, argv, cmd_subvol_find_new_usage);
if (check_argc_exact(argc - optind, 2))
usage(cmd_subvol_find_new_usage);
subvol = argv[optind];
last_gen = arg_strtou64(argv[optind + 1]);
ret = test_issubvolume(subvol);
if (ret < 0) {
error("cannot access subvolume %s: %s", subvol, strerror(-ret));
return 1;
}
if (!ret) {
error("not a subvolume: %s", subvol);
return 1;
}
fd = btrfs_open_dir(subvol, &dirstream, 1);
if (fd < 0)
return 1;
ret = ioctl(fd, BTRFS_IOC_SYNC);
if (ret < 0) {
error("sync ioctl failed on '%s': %s",
subvol, strerror(errno));
close_file_or_dir(fd, dirstream);
return 1;
}
ret = btrfs_list_find_updated_files(fd, 0, last_gen);
close_file_or_dir(fd, dirstream);
return !!ret;
}
static int cmd_scrub_cancel(int argc, char **argv)
{
char *path;
int ret;
int fdmnt = -1;
DIR *dirstream = NULL;
clean_args_no_options(argc, argv, cmd_scrub_cancel_usage);
if (check_argc_exact(argc - optind, 1))
usage(cmd_scrub_cancel_usage);
path = argv[optind];
fdmnt = open_path_or_dev_mnt(path, &dirstream, 1);
if (fdmnt < 0) {
ret = 1;
goto out;
}
ret = ioctl(fdmnt, BTRFS_IOC_SCRUB_CANCEL, NULL);
if (ret < 0) {
error("scrub cancel failed on %s: %s", path,
errno == ENOTCONN ? "not running" : strerror(errno));
if (errno == ENOTCONN)
ret = 2;
else
ret = 1;
goto out;
}
ret = 0;
printf("scrub cancelled\n");
out:
close_file_or_dir(fdmnt, dirstream);
return ret;
}
static int cmd_rescue_fix_device_size(int argc, char **argv)
{
struct btrfs_fs_info *fs_info;
char *devname;
int ret;
clean_args_no_options(argc, argv, cmd_rescue_fix_device_size_usage);
if (check_argc_exact(argc, 2))
usage(cmd_rescue_fix_device_size_usage);
devname = argv[optind];
ret = check_mounted(devname);
if (ret < 0) {
errno = -ret;
error("could not check mount status: %m");
goto out;
} else if (ret) {
error("%s is currently mounted", devname);
ret = -EBUSY;
goto out;
}
fs_info = open_ctree_fs_info(devname, 0, 0, 0, OPEN_CTREE_WRITES |
OPEN_CTREE_PARTIAL);
if (!fs_info) {
error("could not open btrfs");
ret = -EIO;
goto out;
}
ret = btrfs_fix_device_and_super_size(fs_info);
if (ret > 0)
ret = 0;
close_ctree(fs_info->tree_root);
out:
return !!ret;
}
static int _cmd_qgroup_assign(int assign, int argc, char **argv,
const char * const *usage_str)
{
int ret = 0;
int fd;
int rescan = 0;
char *path;
struct btrfs_ioctl_qgroup_assign_args args;
DIR *dirstream = NULL;
if (assign) {
while (1) {
enum { GETOPT_VAL_RESCAN = 256, GETOPT_VAL_NO_RESCAN };
static const struct option long_options[] = {
{ "rescan", no_argument, NULL,
GETOPT_VAL_RESCAN },
{ "no-rescan", no_argument, NULL,
GETOPT_VAL_NO_RESCAN },
{ NULL, 0, NULL, 0 }
};
int c = getopt_long(argc, argv, "", long_options, NULL);
if (c < 0)
break;
switch (c) {
case GETOPT_VAL_RESCAN:
rescan = 1;
break;
case GETOPT_VAL_NO_RESCAN:
rescan = 0;
break;
default:
/* Usage printed by the caller */
return -1;
}
}
} else {
clean_args_no_options(argc, argv, usage_str);
}
if (check_argc_exact(argc - optind, 3))
usage(usage_str);
memset(&args, 0, sizeof(args));
args.assign = assign;
args.src = parse_qgroupid(argv[optind]);
args.dst = parse_qgroupid(argv[optind + 1]);
path = argv[optind + 2];
/*
* FIXME src should accept subvol path
*/
if (btrfs_qgroup_level(args.src) >= btrfs_qgroup_level(args.dst)) {
error("bad relation requested: %s", path);
return 1;
}
fd = btrfs_open_dir(path, &dirstream, 1);
if (fd < 0)
return 1;
ret = ioctl(fd, BTRFS_IOC_QGROUP_ASSIGN, &args);
if (ret < 0) {
error("unable to assign quota group: %s", strerror(errno));
close_file_or_dir(fd, dirstream);
return 1;
}
/*
* If ret > 0, it means assign caused qgroup data inconsistent state.
* Schedule a quota rescan if requested.
*
* The return value change only happens in newer kernel. But will not
* cause problem since old kernel has a bug that will never clear
* INCONSISTENT bit.
*/
if (ret > 0) {
if (rescan) {
struct btrfs_ioctl_quota_rescan_args qargs;
printf("Quota data changed, rescan scheduled\n");
memset(&qargs, 0, sizeof(qargs));
ret = ioctl(fd, BTRFS_IOC_QUOTA_RESCAN, &qargs);
if (ret < 0)
error("quota rescan failed: %s",
strerror(errno));
} else {
warning("quotas may be inconsistent, rescan needed");
}
}
close_file_or_dir(fd, dirstream);
return ret;
}
static int _cmd_device_remove(int argc, char **argv,
const char * const *usagestr)
{
char *mntpnt;
int i, fdmnt, ret = 0;
DIR *dirstream = NULL;
clean_args_no_options(argc, argv, usagestr);
if (check_argc_min(argc - optind, 2))
usage(usagestr);
mntpnt = argv[argc - 1];
fdmnt = btrfs_open_dir(mntpnt, &dirstream, 1);
if (fdmnt < 0)
return 1;
for(i = optind; i < argc - 1; i++) {
struct btrfs_ioctl_vol_args arg;
struct btrfs_ioctl_vol_args_v2 argv2 = {0};
int is_devid = 0;
int res;
if (string_is_numerical(argv[i])) {
argv2.devid = arg_strtou64(argv[i]);
argv2.flags = BTRFS_DEVICE_SPEC_BY_ID;
is_devid = 1;
} else if (is_block_device(argv[i]) == 1 ||
strcmp(argv[i], "missing") == 0) {
strncpy_null(argv2.name, argv[i]);
} else {
error("not a block device: %s", argv[i]);
ret++;
continue;
}
/*
* Positive values are from BTRFS_ERROR_DEV_*,
* otherwise it's a generic error, one of errnos
*/
res = ioctl(fdmnt, BTRFS_IOC_RM_DEV_V2, &argv2);
/*
* If BTRFS_IOC_RM_DEV_V2 is not supported we get ENOTTY and if
* argv2.flags includes a flag which kernel doesn't understand then
* we shall get EOPNOTSUPP
*/
if (res < 0 && (errno == ENOTTY || errno == EOPNOTSUPP)) {
if (is_devid) {
error("device delete by id failed: %m");
ret++;
continue;
}
memset(&arg, 0, sizeof(arg));
strncpy_null(arg.name, argv[i]);
res = ioctl(fdmnt, BTRFS_IOC_RM_DEV, &arg);
}
if (res) {
const char *msg;
if (res > 0)
msg = btrfs_err_str(res);
else
msg = strerror(errno);
if (is_devid) {
error("error removing devid %llu: %s",
(unsigned long long)argv2.devid, msg);
} else {
error("error removing device '%s': %s",
argv[i], msg);
}
ret++;
}
}
close_file_or_dir(fdmnt, dirstream);
return !!ret;
}
static int cmd_subvol_show(int argc, char **argv)
{
struct root_info get_ri;
struct btrfs_list_filter_set *filter_set = NULL;
char tstr[256];
char uuidparse[BTRFS_UUID_UNPARSED_SIZE];
char *fullpath = NULL;
char raw_prefix[] = "\t\t\t\t";
int fd = -1;
int ret = 1;
DIR *dirstream1 = NULL;
clean_args_no_options(argc, argv, cmd_subvol_show_usage);
if (check_argc_exact(argc - optind, 1))
usage(cmd_subvol_show_usage);
memset(&get_ri, 0, sizeof(get_ri));
fullpath = realpath(argv[optind], NULL);
if (!fullpath) {
error("cannot find real path for '%s': %s",
argv[optind], strerror(errno));
goto out;
}
ret = get_subvol_info(fullpath, &get_ri);
if (ret == 2) {
/*
* Since the top level btrfs was given don't
* take that as error
*/
printf("%s is toplevel subvolume\n", fullpath);
ret = 0;
goto out;
}
if (ret) {
if (ret < 0) {
error("Failed to get subvol info %s: %s\n",
fullpath, strerror(-ret));
} else {
error("Failed to get subvol info %s: %d\n",
fullpath, ret);
}
return ret;
}
/* print the info */
printf("%s\n", fullpath);
printf("\tName: \t\t\t%s\n", get_ri.name);
if (uuid_is_null(get_ri.uuid))
strcpy(uuidparse, "-");
else
uuid_unparse(get_ri.uuid, uuidparse);
printf("\tUUID: \t\t\t%s\n", uuidparse);
if (uuid_is_null(get_ri.puuid))
strcpy(uuidparse, "-");
else
uuid_unparse(get_ri.puuid, uuidparse);
printf("\tParent UUID: \t\t%s\n", uuidparse);
if (uuid_is_null(get_ri.ruuid))
strcpy(uuidparse, "-");
else
uuid_unparse(get_ri.ruuid, uuidparse);
printf("\tReceived UUID: \t\t%s\n", uuidparse);
if (get_ri.otime) {
struct tm tm;
localtime_r(&get_ri.otime, &tm);
strftime(tstr, 256, "%Y-%m-%d %X %z", &tm);
} else
strcpy(tstr, "-");
printf("\tCreation time: \t\t%s\n", tstr);
printf("\tSubvolume ID: \t\t%llu\n", get_ri.root_id);
printf("\tGeneration: \t\t%llu\n", get_ri.gen);
printf("\tGen at creation: \t%llu\n", get_ri.ogen);
printf("\tParent ID: \t\t%llu\n", get_ri.ref_tree);
printf("\tTop level ID: \t\t%llu\n", get_ri.top_id);
if (get_ri.flags & BTRFS_ROOT_SUBVOL_RDONLY)
printf("\tFlags: \t\t\treadonly\n");
else
printf("\tFlags: \t\t\t-\n");
/* print the snapshots of the given subvol if any*/
printf("\tSnapshot(s):\n");
filter_set = btrfs_list_alloc_filter_set();
btrfs_list_setup_filter(&filter_set, BTRFS_LIST_FILTER_BY_PARENT,
(u64)(unsigned long)get_ri.uuid);
btrfs_list_setup_print_column(BTRFS_LIST_PATH);
fd = open_file_or_dir(fullpath, &dirstream1);
if (fd < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", fullpath);
goto out;
}
btrfs_list_subvols_print(fd, filter_set, NULL, BTRFS_LIST_LAYOUT_RAW,
1, raw_prefix);
out:
/* clean up */
free(get_ri.path);
free(get_ri.name);
free(get_ri.full_path);
free(filter_set);
close_file_or_dir(fd, dirstream1);
free(fullpath);
return !!ret;
}
