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_qgroup_show(int argc, char **argv)
{
char *path;
int ret = 0;
int fd;
int e;
DIR *dirstream = NULL;
u64 qgroupid;
int filter_flag = 0;
unsigned unit_mode;
struct btrfs_qgroup_comparer_set *comparer_set;
struct btrfs_qgroup_filter_set *filter_set;
filter_set = btrfs_qgroup_alloc_filter_set();
comparer_set = btrfs_qgroup_alloc_comparer_set();
unit_mode = get_unit_mode_from_arg(&argc, argv, 0);
optind = 1;
while (1) {
int c;
static const struct option long_options[] = {
{"sort", required_argument, NULL, 'S'},
{ NULL, 0, NULL, 0 }
};
c = getopt_long(argc, argv, "pcreFf", long_options, NULL);
if (c < 0)
break;
switch (c) {
case 'p':
btrfs_qgroup_setup_print_column(
BTRFS_QGROUP_PARENT);
break;
case 'c':
btrfs_qgroup_setup_print_column(
BTRFS_QGROUP_CHILD);
break;
case 'r':
btrfs_qgroup_setup_print_column(
BTRFS_QGROUP_MAX_RFER);
break;
case 'e':
btrfs_qgroup_setup_print_column(
BTRFS_QGROUP_MAX_EXCL);
break;
case 'F':
filter_flag |= 0x1;
break;
case 'f':
filter_flag |= 0x2;
break;
case 'S':
ret = btrfs_qgroup_parse_sort_string(optarg,
&comparer_set);
if (ret)
usage(cmd_qgroup_show_usage);
break;
default:
usage(cmd_qgroup_show_usage);
}
}
btrfs_qgroup_setup_units(unit_mode);
if (check_argc_exact(argc - optind, 1))
usage(cmd_qgroup_show_usage);
path = argv[optind];
fd = btrfs_open_dir(path, &dirstream, 1);
if (fd < 0) {
btrfs_qgroup_free_filter_set(filter_set);
btrfs_qgroup_free_comparer_set(comparer_set);
return 1;
}
if (filter_flag) {
qgroupid = btrfs_get_path_rootid(fd);
if (filter_flag & 0x1)
btrfs_qgroup_setup_filter(&filter_set,
BTRFS_QGROUP_FILTER_ALL_PARENT,
qgroupid);
if (filter_flag & 0x2)
btrfs_qgroup_setup_filter(&filter_set,
BTRFS_QGROUP_FILTER_PARENT,
qgroupid);
}
ret = btrfs_show_qgroups(fd, filter_set, comparer_set);
e = errno;
close_file_or_dir(fd, dirstream);
if (ret < 0)
error("can't list qgroups: %s", strerror(e));
return !!ret;
}
static int cmd_inspect_logical_resolve(int argc, char **argv)
{
int ret;
int fd;
int i;
int verbose = 0;
int getpath = 1;
int bytes_left;
struct btrfs_ioctl_logical_ino_args loi;
struct btrfs_data_container *inodes;
u64 size = 4096;
char full_path[4096];
char *path_ptr;
DIR *dirstream = NULL;
optind = 1;
while (1) {
int c = getopt(argc, argv, "Pvs:");
if (c < 0)
break;
switch (c) {
case 'P':
getpath = 0;
break;
case 'v':
verbose = 1;
break;
case 's':
size = arg_strtou64(optarg);
break;
default:
usage(cmd_inspect_logical_resolve_usage);
}
}
if (check_argc_exact(argc - optind, 2))
usage(cmd_inspect_logical_resolve_usage);
size = min(size, (u64)64 * 1024);
inodes = malloc(size);
if (!inodes)
return 1;
memset(inodes, 0, sizeof(*inodes));
loi.logical = arg_strtou64(argv[optind]);
loi.size = size;
loi.inodes = ptr_to_u64(inodes);
fd = btrfs_open_dir(argv[optind + 1], &dirstream, 1);
if (fd < 0) {
ret = 12;
goto out;
}
ret = ioctl(fd, BTRFS_IOC_LOGICAL_INO, &loi);
if (ret < 0) {
error("logical ino ioctl: %s", strerror(errno));
goto out;
}
if (verbose)
printf("ioctl ret=%d, total_size=%llu, bytes_left=%lu, "
"bytes_missing=%lu, cnt=%d, missed=%d\n",
ret, size,
(unsigned long)inodes->bytes_left,
(unsigned long)inodes->bytes_missing,
inodes->elem_cnt, inodes->elem_missed);
bytes_left = sizeof(full_path);
ret = snprintf(full_path, bytes_left, "%s/", argv[optind+1]);
path_ptr = full_path + ret;
bytes_left -= ret + 1;
BUG_ON(bytes_left < 0);
for (i = 0; i < inodes->elem_cnt; i += 3) {
u64 inum = inodes->val[i];
u64 offset = inodes->val[i+1];
u64 root = inodes->val[i+2];
int path_fd;
char *name;
DIR *dirs = NULL;
if (getpath) {
name = btrfs_list_path_for_root(fd, root);
if (IS_ERR(name)) {
ret = PTR_ERR(name);
goto out;
}
if (!name) {
path_ptr[-1] = '\0';
path_fd = fd;
} else {
path_ptr[-1] = '/';
ret = snprintf(path_ptr, bytes_left, "%s",
name);
BUG_ON(ret >= bytes_left);
free(name);
path_fd = btrfs_open_dir(full_path, &dirs, 1);
if (path_fd < 0) {
ret = -ENOENT;
goto out;
}
}
__ino_to_path_fd(inum, path_fd, verbose, full_path);
if (path_fd != fd)
close_file_or_dir(path_fd, dirs);
} else {
printf("inode %llu offset %llu root %llu\n", inum,
offset, root);
}
}
out:
close_file_or_dir(fd, dirstream);
free(inodes);
return !!ret;
}
static int cmd_device_add(int argc, char **argv)
{
char *mntpnt;
int i, fdmnt, ret = 0;
DIR *dirstream = NULL;
int discard = 1;
int force = 0;
int last_dev;
optind = 0;
while (1) {
int c;
static const struct option long_options[] = {
{ "nodiscard", optional_argument, NULL, 'K'},
{ "force", no_argument, NULL, 'f'},
{ NULL, 0, NULL, 0}
};
c = getopt_long(argc, argv, "Kf", long_options, NULL);
if (c < 0)
break;
switch (c) {
case 'K':
discard = 0;
break;
case 'f':
force = 1;
break;
default:
usage(cmd_device_add_usage);
}
}
if (check_argc_min(argc - optind, 2))
usage(cmd_device_add_usage);
last_dev = argc - 1;
mntpnt = argv[last_dev];
fdmnt = btrfs_open_dir(mntpnt, &dirstream, 1);
if (fdmnt < 0)
return 1;
for (i = optind; i < last_dev; i++){
struct btrfs_ioctl_vol_args ioctl_args;
int devfd, res;
u64 dev_block_count = 0;
char *path;
res = test_dev_for_mkfs(argv[i], force);
if (res) {
ret++;
continue;
}
devfd = open(argv[i], O_RDWR);
if (devfd < 0) {
error("unable to open device '%s'", argv[i]);
ret++;
continue;
}
res = btrfs_prepare_device(devfd, argv[i], &dev_block_count, 0,
PREP_DEVICE_ZERO_END | PREP_DEVICE_VERBOSE |
(discard ? PREP_DEVICE_DISCARD : 0));
close(devfd);
if (res) {
ret++;
goto error_out;
}
path = canonicalize_path(argv[i]);
if (!path) {
error("could not canonicalize pathname '%s': %m",
argv[i]);
ret++;
goto error_out;
}
memset(&ioctl_args, 0, sizeof(ioctl_args));
strncpy_null(ioctl_args.name, path);
res = ioctl(fdmnt, BTRFS_IOC_ADD_DEV, &ioctl_args);
if (res < 0) {
error("error adding device '%s': %m", path);
ret++;
}
free(path);
}
error_out:
close_file_or_dir(fdmnt, 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;
}
/* Checks the status of the balance if any
* return codes:
* 2 : Error failed to know if there is any pending balance
* 1 : Successful to know status of a pending balance
* 0 : When there is no pending balance or completed
*/
static int cmd_balance_status(int argc, char **argv)
{
struct btrfs_ioctl_balance_args args;
const char *path;
DIR *dirstream = NULL;
int fd;
int verbose = 0;
int ret;
int e;
optind = 1;
while (1) {
int opt;
static const struct option longopts[] = {
{ "verbose", no_argument, NULL, 'v' },
{ NULL, 0, NULL, 0 }
};
opt = getopt_long(argc, argv, "v", longopts, NULL);
if (opt < 0)
break;
switch (opt) {
case 'v':
verbose = 1;
break;
default:
usage(cmd_balance_status_usage);
}
}
if (check_argc_exact(argc - optind, 1))
usage(cmd_balance_status_usage);
path = argv[optind];
fd = btrfs_open_dir(path, &dirstream, 1);
if (fd < 0)
return 2;
ret = ioctl(fd, BTRFS_IOC_BALANCE_PROGRESS, &args);
e = errno;
close_file_or_dir(fd, dirstream);
if (ret < 0) {
if (e == ENOTCONN) {
printf("No balance found on '%s'\n", path);
return 0;
}
error("balance status on '%s' failed: %s", path, strerror(e));
return 2;
}
if (args.state & BTRFS_BALANCE_STATE_RUNNING) {
printf("Balance on '%s' is running", path);
if (args.state & BTRFS_BALANCE_STATE_CANCEL_REQ)
printf(", cancel requested\n");
else if (args.state & BTRFS_BALANCE_STATE_PAUSE_REQ)
printf(", pause requested\n");
else
printf("\n");
} else {
printf("Balance on '%s' is paused\n", path);
}
printf("%llu out of about %llu chunks balanced (%llu considered), "
"%3.f%% left\n", (unsigned long long)args.stat.completed,
(unsigned long long)args.stat.expected,
(unsigned long long)args.stat.considered,
100 * (1 - (float)args.stat.completed/args.stat.expected));
if (verbose)
dump_ioctl_balance_args(&args);
return 1;
}
static int dev_replace_handle_sigint(int fd)
{
struct sigaction sa = {
.sa_handler = fd == -1 ? SIG_DFL : dev_replace_sigint_handler
};
dev_replace_cancel_fd = fd;
return sigaction(SIGINT, &sa, NULL);
}
static const char *const cmd_replace_start_usage[] = {
"btrfs replace start [-Bfr] <srcdev>|<devid> <targetdev> <mount_point>",
"Replace device of a btrfs filesystem.",
"On a live filesystem, duplicate the data to the target device which",
"is currently stored on the source device. If the source device is not",
"available anymore, or if the -r option is set, the data is built",
"only using the RAID redundancy mechanisms. After completion of the",
"operation, the source device is removed from the filesystem.",
"If the <srcdev> is a numerical value, it is assumed to be the device id",
"of the filesystem which is mounted at <mount_point>, otherwise it is",
"the path to the source device. If the source device is disconnected,",
"from the system, you have to use the <devid> parameter format.",
"The <targetdev> needs to be same size or larger than the <srcdev>.",
"",
"-r only read from <srcdev> if no other zero-defect mirror exists",
" (enable this if your drive has lots of read errors, the access",
" would be very slow)",
"-f force using and overwriting <targetdev> even if it looks like",
" containing a valid btrfs filesystem. A valid filesystem is",
" assumed if a btrfs superblock is found which contains a",
" correct checksum. Devices which are currently mounted are",
" never allowed to be used as the <targetdev>",
"-B do not background",
NULL
};
static int cmd_replace_start(int argc, char **argv)
{
struct btrfs_ioctl_dev_replace_args start_args = {0};
struct btrfs_ioctl_dev_replace_args status_args = {0};
int ret;
int i;
int c;
int fdmnt = -1;
int fddstdev = -1;
char *path;
char *srcdev;
char *dstdev = NULL;
int avoid_reading_from_srcdev = 0;
int force_using_targetdev = 0;
u64 dstdev_block_count;
int do_not_background = 0;
DIR *dirstream = NULL;
u64 srcdev_size;
u64 dstdev_size;
while ((c = getopt(argc, argv, "Brf")) != -1) {
switch (c) {
case 'B':
do_not_background = 1;
break;
case 'r':
avoid_reading_from_srcdev = 1;
break;
case 'f':
force_using_targetdev = 1;
break;
case '?':
default:
usage(cmd_replace_start_usage);
}
}
start_args.start.cont_reading_from_srcdev_mode =
avoid_reading_from_srcdev ?
BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_AVOID :
BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_ALWAYS;
if (check_argc_exact(argc - optind, 3))
usage(cmd_replace_start_usage);
path = argv[optind + 2];
fdmnt = open_path_or_dev_mnt(path, &dirstream, 1);
if (fdmnt < 0)
goto leave_with_error;
/* check for possible errors before backgrounding */
status_args.cmd = BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS;
status_args.result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_RESULT;
ret = ioctl(fdmnt, BTRFS_IOC_DEV_REPLACE, &status_args);
if (ret < 0) {
fprintf(stderr,
"ERROR: ioctl(DEV_REPLACE_STATUS) failed on \"%s\": %s",
path, strerror(errno));
if (status_args.result != BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_RESULT)
fprintf(stderr, ", %s\n",
replace_dev_result2string(status_args.result));
else
fprintf(stderr, "\n");
goto leave_with_error;
}
if (status_args.result != BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR) {
error("ioctl(DEV_REPLACE_STATUS) on '%s' returns error: %s",
path, replace_dev_result2string(status_args.result));
goto leave_with_error;
}
if (status_args.status.replace_state ==
BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED) {
error("device replace on '%s' already started", path);
goto leave_with_error;
}
srcdev = argv[optind];
dstdev = canonicalize_path(argv[optind + 1]);
if (!dstdev) {
error("cannot canonicalize path '%s': %s",
argv[optind + 1], strerror(errno));
goto leave_with_error;
}
if (string_is_numerical(srcdev)) {
struct btrfs_ioctl_fs_info_args fi_args;
struct btrfs_ioctl_dev_info_args *di_args = NULL;
start_args.start.srcdevid = arg_strtou64(srcdev);
ret = get_fs_info(path, &fi_args, &di_args);
if (ret) {
error("failed to get device info: %s", strerror(-ret));
free(di_args);
goto leave_with_error;
}
if (!fi_args.num_devices) {
error("no devices found");
free(di_args);
goto leave_with_error;
}
for (i = 0; i < fi_args.num_devices; i++)
if (start_args.start.srcdevid == di_args[i].devid)
break;
srcdev_size = di_args[i].total_bytes;
free(di_args);
if (i == fi_args.num_devices) {
error("'%s' is not a valid devid for filesystem '%s'",
srcdev, path);
goto leave_with_error;
}
} else if (is_block_device(srcdev) > 0) {
strncpy((char *)start_args.start.srcdev_name, srcdev,
BTRFS_DEVICE_PATH_NAME_MAX);
start_args.start.srcdevid = 0;
srcdev_size = get_partition_size(srcdev);
} else {
error("source device must be a block device or a devid");
goto leave_with_error;
}
ret = test_dev_for_mkfs(dstdev, force_using_targetdev);
if (ret)
goto leave_with_error;
dstdev_size = get_partition_size(dstdev);
if (srcdev_size > dstdev_size) {
error("target device smaller than source device (required %llu bytes)",
srcdev_size);
goto leave_with_error;
}
fddstdev = open(dstdev, O_RDWR);
if (fddstdev < 0) {
error("unable to open %s: %s", dstdev, strerror(errno));
goto leave_with_error;
}
strncpy((char *)start_args.start.tgtdev_name, dstdev,
BTRFS_DEVICE_PATH_NAME_MAX);
ret = btrfs_prepare_device(fddstdev, dstdev, &dstdev_block_count, 0,
PREP_DEVICE_ZERO_END | PREP_DEVICE_VERBOSE);
if (ret)
goto leave_with_error;
close(fddstdev);
fddstdev = -1;
free(dstdev);
dstdev = NULL;
dev_replace_handle_sigint(fdmnt);
if (!do_not_background) {
if (daemon(0, 0) < 0) {
error("backgrounding failed: %s", strerror(errno));
goto leave_with_error;
}
}
start_args.cmd = BTRFS_IOCTL_DEV_REPLACE_CMD_START;
start_args.result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_RESULT;
ret = ioctl(fdmnt, BTRFS_IOC_DEV_REPLACE, &start_args);
if (do_not_background) {
if (ret < 0) {
fprintf(stderr,
"ERROR: ioctl(DEV_REPLACE_START) failed on \"%s\": %s",
path, strerror(errno));
if (start_args.result != BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_RESULT)
fprintf(stderr, ", %s\n",
replace_dev_result2string(start_args.result));
else
fprintf(stderr, "\n");
if (errno == EOPNOTSUPP)
warning("device replace of RAID5/6 not supported with this kernel");
goto leave_with_error;
}
if (start_args.result !=
BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR) {
error("ioctl(DEV_REPLACE_START) on '%s' returns error: %s",
path,
replace_dev_result2string(start_args.result));
goto leave_with_error;
}
}
close_file_or_dir(fdmnt, dirstream);
return 0;
leave_with_error:
if (dstdev)
free(dstdev);
if (fdmnt != -1)
close(fdmnt);
if (fddstdev != -1)
close(fddstdev);
return 1;
}
static const char *const cmd_replace_status_usage[] = {
"btrfs replace status [-1] <mount_point>",
"Print status and progress information of a running device replace",
"operation",
"",
"-1 print once instead of print continuously until the replace",
" operation finishes (or is canceled)",
NULL
};
static int cmd_replace_status(int argc, char **argv)
{
int fd;
int c;
char *path;
int once = 0;
int ret;
DIR *dirstream = NULL;
while ((c = getopt(argc, argv, "1")) != -1) {
switch (c) {
case '1':
once = 1;
break;
case '?':
default:
usage(cmd_replace_status_usage);
}
}
if (check_argc_exact(argc - optind, 1))
usage(cmd_replace_status_usage);
path = argv[optind];
fd = btrfs_open_dir(path, &dirstream, 1);
if (fd < 0)
return 1;
ret = print_replace_status(fd, path, once);
close_file_or_dir(fd, dirstream);
return !!ret;
}
static int cmd_subvol_sync(int argc, char **argv)
{
int fd = -1;
int i;
int ret = 1;
DIR *dirstream = NULL;
u64 *ids = NULL;
int id_count;
int sleep_interval = 1;
while (1) {
int c = getopt(argc, argv, "s:");
if (c < 0)
break;
switch (c) {
case 's':
sleep_interval = atoi(optarg);
if (sleep_interval < 1) {
error("invalid sleep interval %s", optarg);
ret = 1;
goto out;
}
break;
default:
usage(cmd_subvol_sync_usage);
}
}
if (check_argc_min(argc - optind, 1))
usage(cmd_subvol_sync_usage);
fd = btrfs_open_dir(argv[optind], &dirstream, 1);
if (fd < 0) {
ret = 1;
goto out;
}
optind++;
id_count = argc - optind;
if (!id_count) {
id_count = enumerate_dead_subvols(fd, &ids);
if (id_count < 0) {
error("can't enumerate dead subvolumes: %s",
strerror(-id_count));
ret = 1;
goto out;
}
if (id_count == 0) {
ret = 0;
goto out;
}
} else {
ids = (u64*)malloc(id_count * sizeof(u64));
if (!ids) {
error("not enough memory");
ret = 1;
goto out;
}
for (i = 0; i < id_count; i++) {
u64 id;
const char *arg;
arg = argv[optind + i];
errno = 0;
id = strtoull(arg, NULL, 10);
if (errno < 0) {
error("unrecognized subvolume id %s", arg);
ret = 1;
goto out;
}
if (id < BTRFS_FIRST_FREE_OBJECTID
|| id > BTRFS_LAST_FREE_OBJECTID) {
error("subvolume id %s out of range\n", arg);
ret = 1;
goto out;
}
ids[i] = id;
}
}
ret = wait_for_subvolume_cleaning(fd, id_count, ids, sleep_interval);
out:
free(ids);
close_file_or_dir(fd, dirstream);
return !!ret;
}
static int do_balance(const char *path, struct btrfs_ioctl_balance_args *args,
unsigned flags)
{
int fd;
int ret;
int e;
DIR *dirstream = NULL;
fd = btrfs_open_dir(path, &dirstream, 1);
if (fd < 0)
return 1;
if (!(flags & BALANCE_START_FILTERS) && !(flags & BALANCE_START_NOWARN)) {
int delay = 10;
printf("WARNING:\n\n");
printf("\tFull balance without filters requested. This operation is very\n");
printf("\tintense and takes potentially very long. It is recommended to\n");
printf("\tuse the balance filters to narrow down the balanced data.\n");
printf("\tUse 'btrfs balance start --full-balance' option to skip this\n");
printf("\twarning. The operation will start in %d seconds.\n", delay);
printf("\tUse Ctrl-C to stop it.\n");
while (delay) {
printf("%2d", delay--);
fflush(stdout);
sleep(1);
}
printf("\nStarting balance without any filters.\n");
}
ret = ioctl(fd, BTRFS_IOC_BALANCE_V2, args);
e = errno;
if (ret < 0) {
/*
* older kernels don't have the new balance ioctl, try the
* old one. But, the old one doesn't know any filters, so
* don't fall back if they tried to use the fancy new things
*/
if (e == ENOTTY && !(flags & BALANCE_START_FILTERS)) {
ret = do_balance_v1(fd);
if (ret == 0)
goto out;
e = errno;
}
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");
ret = 0;
} else {
error("error during balancing '%s': %s", path, strerror(e));
if (e != EINPROGRESS)
fprintf(stderr,
"There may be more info in syslog - try dmesg | tail\n");
ret = 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);
ret = 0;
}
out:
close_file_or_dir(fd, dirstream);
return ret;
}
int cmd_filesystem_usage(int argc, char **argv)
{
int ret = 0;
unsigned unit_mode;
int i;
int more_than_one = 0;
int tabular = 0;
unit_mode = get_unit_mode_from_arg(&argc, argv, 1);
optind = 1;
while (1) {
int c;
c = getopt(argc, argv, "T");
if (c < 0)
break;
switch (c) {
case 'T':
tabular = 1;
break;
default:
usage(cmd_filesystem_usage_usage);
}
}
if (check_argc_min(argc - optind, 1))
usage(cmd_filesystem_usage_usage);
for (i = optind; i < argc; i++) {
int fd;
DIR *dirstream = NULL;
struct chunk_info *chunkinfo = NULL;
struct device_info *devinfo = NULL;
int chunkcount = 0;
int devcount = 0;
fd = btrfs_open_dir(argv[i], &dirstream, 1);
if (fd < 0) {
ret = 1;
goto out;
}
if (more_than_one)
printf("\n");
ret = load_chunk_and_device_info(fd, &chunkinfo, &chunkcount,
&devinfo, &devcount);
if (ret)
goto cleanup;
ret = print_filesystem_usage_overall(fd, chunkinfo, chunkcount,
devinfo, devcount, argv[i], unit_mode);
if (ret)
goto cleanup;
printf("\n");
ret = print_filesystem_usage_by_chunk(fd, chunkinfo, chunkcount,
devinfo, devcount, argv[i], unit_mode, tabular);
cleanup:
close_file_or_dir(fd, dirstream);
free(chunkinfo);
free(devinfo);
if (ret)
goto out;
more_than_one = 1;
}
out:
return !!ret;
}
static int cmd_subvol_snapshot(int argc, char **argv)
{
char *subvol, *dst;
int res, retval;
int fd = -1, fddst = -1;
int len, readonly = 0;
char *dupname = NULL;
char *dupdir = NULL;
char *newname;
char *dstdir;
struct btrfs_ioctl_vol_args_v2 args;
struct btrfs_qgroup_inherit *inherit = NULL;
DIR *dirstream1 = NULL, *dirstream2 = NULL;
memset(&args, 0, sizeof(args));
while (1) {
int c = getopt(argc, argv, "c:i:r");
if (c < 0)
break;
switch (c) {
case 'c':
res = qgroup_inherit_add_copy(&inherit, optarg, 0);
if (res) {
retval = res;
goto out;
}
break;
case 'i':
res = qgroup_inherit_add_group(&inherit, optarg);
if (res) {
retval = res;
goto out;
}
break;
case 'r':
readonly = 1;
break;
case 'x':
res = qgroup_inherit_add_copy(&inherit, optarg, 1);
if (res) {
retval = res;
goto out;
}
break;
default:
usage(cmd_subvol_snapshot_usage);
}
}
if (check_argc_exact(argc - optind, 2))
usage(cmd_subvol_snapshot_usage);
subvol = argv[optind];
dst = argv[optind + 1];
retval = 1; /* failure */
res = test_issubvolume(subvol);
if (res < 0) {
error("cannot access subvolume %s: %s", subvol, strerror(-res));
goto out;
}
if (!res) {
error("not a subvolume: %s", subvol);
goto out;
}
res = test_isdir(dst);
if (res < 0 && res != -ENOENT) {
error("cannot access %s: %s", dst, strerror(-res));
goto out;
}
if (res == 0) {
error("'%s' exists and it is not a directory", dst);
goto out;
}
if (res > 0) {
dupname = strdup(subvol);
newname = basename(dupname);
dstdir = dst;
} else {
dupname = strdup(dst);
newname = basename(dupname);
dupdir = strdup(dst);
dstdir = dirname(dupdir);
}
if (!test_issubvolname(newname)) {
error("invalid snapshot name '%s'", newname);
goto out;
}
len = strlen(newname);
if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
error("snapshot name too long '%s'", newname);
goto out;
}
fddst = btrfs_open_dir(dstdir, &dirstream1, 1);
if (fddst < 0)
goto out;
fd = btrfs_open_dir(subvol, &dirstream2, 1);
if (fd < 0)
goto out;
if (readonly) {
args.flags |= BTRFS_SUBVOL_RDONLY;
printf("Create a readonly snapshot of '%s' in '%s/%s'\n",
subvol, dstdir, newname);
} else {
printf("Create a snapshot of '%s' in '%s/%s'\n",
subvol, dstdir, newname);
}
args.fd = fd;
if (inherit) {
args.flags |= BTRFS_SUBVOL_QGROUP_INHERIT;
args.size = qgroup_inherit_size(inherit);
args.qgroup_inherit = inherit;
}
strncpy_null(args.name, newname);
res = ioctl(fddst, BTRFS_IOC_SNAP_CREATE_V2, &args);
if (res < 0) {
error("cannot snapshot '%s': %s", subvol, strerror(errno));
goto out;
}
retval = 0; /* success */
out:
close_file_or_dir(fddst, dirstream1);
close_file_or_dir(fd, dirstream2);
free(inherit);
free(dupname);
free(dupdir);
return retval;
}
static int cmd_subvol_list(int argc, char **argv)
{
struct btrfs_list_filter_set *filter_set;
struct btrfs_list_comparer_set *comparer_set;
u64 flags = 0;
int fd = -1;
u64 top_id;
int ret = -1, uerr = 0;
char *subvol;
int is_tab_result = 0;
int is_list_all = 0;
int is_only_in_path = 0;
DIR *dirstream = NULL;
filter_set = btrfs_list_alloc_filter_set();
comparer_set = btrfs_list_alloc_comparer_set();
while(1) {
int c;
static const struct option long_options[] = {
{"sort", required_argument, NULL, 'S'},
{NULL, 0, NULL, 0}
};
c = getopt_long(argc, argv,
"acdgopqsurRG:C:t", long_options, NULL);
if (c < 0)
break;
switch(c) {
case 'p':
btrfs_list_setup_print_column(BTRFS_LIST_PARENT);
break;
case 'a':
is_list_all = 1;
break;
case 'c':
btrfs_list_setup_print_column(BTRFS_LIST_OGENERATION);
break;
case 'd':
btrfs_list_setup_filter(&filter_set,
BTRFS_LIST_FILTER_DELETED,
0);
break;
case 'g':
btrfs_list_setup_print_column(BTRFS_LIST_GENERATION);
break;
case 'o':
is_only_in_path = 1;
break;
case 't':
is_tab_result = 1;
break;
case 's':
btrfs_list_setup_filter(&filter_set,
BTRFS_LIST_FILTER_SNAPSHOT_ONLY,
0);
btrfs_list_setup_print_column(BTRFS_LIST_OGENERATION);
btrfs_list_setup_print_column(BTRFS_LIST_OTIME);
break;
case 'u':
btrfs_list_setup_print_column(BTRFS_LIST_UUID);
break;
case 'q':
btrfs_list_setup_print_column(BTRFS_LIST_PUUID);
break;
case 'R':
btrfs_list_setup_print_column(BTRFS_LIST_RUUID);
break;
case 'r':
flags |= BTRFS_ROOT_SUBVOL_RDONLY;
break;
case 'G':
btrfs_list_setup_print_column(BTRFS_LIST_GENERATION);
ret = btrfs_list_parse_filter_string(optarg,
&filter_set,
BTRFS_LIST_FILTER_GEN);
if (ret) {
uerr = 1;
goto out;
}
break;
case 'C':
btrfs_list_setup_print_column(BTRFS_LIST_OGENERATION);
ret = btrfs_list_parse_filter_string(optarg,
&filter_set,
BTRFS_LIST_FILTER_CGEN);
if (ret) {
uerr = 1;
goto out;
}
break;
case 'S':
ret = btrfs_list_parse_sort_string(optarg,
&comparer_set);
if (ret) {
uerr = 1;
goto out;
}
break;
default:
uerr = 1;
goto out;
}
}
if (flags)
btrfs_list_setup_filter(&filter_set, BTRFS_LIST_FILTER_FLAGS,
flags);
if (check_argc_exact(argc - optind, 1)) {
uerr = 1;
goto out;
}
subvol = argv[optind];
fd = btrfs_open_dir(subvol, &dirstream, 1);
if (fd < 0) {
ret = -1;
error("can't access '%s'", subvol);
goto out;
}
ret = btrfs_list_get_path_rootid(fd, &top_id);
if (ret) {
error("can't get rootid for '%s'", subvol);
goto out;
}
if (is_list_all)
btrfs_list_setup_filter(&filter_set,
BTRFS_LIST_FILTER_FULL_PATH,
top_id);
else if (is_only_in_path)
btrfs_list_setup_filter(&filter_set,
BTRFS_LIST_FILTER_TOPID_EQUAL,
top_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);
if (is_tab_result)
ret = btrfs_list_subvols_print(fd, filter_set, comparer_set,
BTRFS_LIST_LAYOUT_TABLE,
!is_list_all && !is_only_in_path, NULL);
else
ret = btrfs_list_subvols_print(fd, filter_set, comparer_set,
BTRFS_LIST_LAYOUT_DEFAULT,
!is_list_all && !is_only_in_path, NULL);
out:
close_file_or_dir(fd, dirstream);
if (filter_set)
free(filter_set);
if (comparer_set)
free(comparer_set);
if (uerr)
usage(cmd_subvol_list_usage);
return !!ret;
}
static int cmd_subvol_delete(int argc, char **argv)
{
int res, ret = 0;
int cnt;
int fd = -1;
struct btrfs_ioctl_vol_args args;
char *dname, *vname, *cpath;
char *dupdname = NULL;
char *dupvname = NULL;
char *path;
DIR *dirstream = NULL;
int verbose = 0;
int commit_mode = 0;
while (1) {
int c;
static const struct option long_options[] = {
{"commit-after", no_argument, NULL, 'c'}, /* commit mode 1 */
{"commit-each", no_argument, NULL, 'C'}, /* commit mode 2 */
{"verbose", no_argument, NULL, 'v'},
{NULL, 0, NULL, 0}
};
c = getopt_long(argc, argv, "cCv", long_options, NULL);
if (c < 0)
break;
switch(c) {
case 'c':
commit_mode = 1;
break;
case 'C':
commit_mode = 2;
break;
case 'v':
verbose++;
break;
default:
usage(cmd_subvol_delete_usage);
}
}
if (check_argc_min(argc - optind, 1))
usage(cmd_subvol_delete_usage);
if (verbose > 0) {
printf("Transaction commit: %s\n",
!commit_mode ? "none (default)" :
commit_mode == 1 ? "at the end" : "after each");
}
cnt = optind;
again:
path = argv[cnt];
res = test_issubvolume(path);
if (res < 0) {
error("cannot access subvolume %s: %s", path, strerror(-res));
ret = 1;
goto out;
}
if (!res) {
error("not a subvolume: %s", path);
ret = 1;
goto out;
}
cpath = realpath(path, NULL);
if (!cpath) {
ret = errno;
error("cannot find real path for '%s': %s",
path, strerror(errno));
goto out;
}
dupdname = strdup(cpath);
dname = dirname(dupdname);
dupvname = strdup(cpath);
vname = basename(dupvname);
free(cpath);
fd = btrfs_open_dir(dname, &dirstream, 1);
if (fd < 0) {
ret = 1;
goto out;
}
printf("Delete subvolume (%s): '%s/%s'\n",
commit_mode == 2 || (commit_mode == 1 && cnt + 1 == argc)
? "commit" : "no-commit", dname, vname);
memset(&args, 0, sizeof(args));
strncpy_null(args.name, vname);
res = ioctl(fd, BTRFS_IOC_SNAP_DESTROY, &args);
if(res < 0 ){
error("cannot delete '%s/%s': %s", dname, vname,
strerror(errno));
ret = 1;
goto out;
}
if (commit_mode == 1) {
res = wait_for_commit(fd);
if (res < 0) {
error("unable to wait for commit after '%s': %s",
path, strerror(errno));
ret = 1;
}
}
out:
free(dupdname);
free(dupvname);
dupdname = NULL;
dupvname = NULL;
cnt++;
if (cnt < argc) {
close_file_or_dir(fd, dirstream);
/* avoid double free */
fd = -1;
dirstream = NULL;
goto again;
}
if (commit_mode == 2 && fd != -1) {
res = wait_for_commit(fd);
if (res < 0) {
error("unable to do final sync after deletion: %s",
strerror(errno));
ret = 1;
}
}
close_file_or_dir(fd, dirstream);
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_quota_rescan(int argc, char **argv)
{
int ret = 0;
int fd;
int e;
char *path = NULL;
struct btrfs_ioctl_quota_rescan_args args;
unsigned long ioctlnum = BTRFS_IOC_QUOTA_RESCAN;
DIR *dirstream = NULL;
int wait_for_completion = 0;
optind = 1;
while (1) {
int c = getopt(argc, argv, "sw");
if (c < 0)
break;
switch (c) {
case 's':
ioctlnum = BTRFS_IOC_QUOTA_RESCAN_STATUS;
break;
case 'w':
wait_for_completion = 1;
break;
default:
usage(cmd_quota_rescan_usage);
}
}
if (ioctlnum != BTRFS_IOC_QUOTA_RESCAN && wait_for_completion) {
fprintf(stderr, "ERROR: -w cannot be used with -s\n");
return 1;
}
if (check_argc_exact(argc - optind, 1))
usage(cmd_quota_rescan_usage);
memset(&args, 0, sizeof(args));
path = argv[optind];
fd = btrfs_open_dir(path, &dirstream, 1);
if (fd < 0)
return 1;
ret = ioctl(fd, ioctlnum, &args);
e = errno;
if (wait_for_completion && (ret == 0 || e == EINPROGRESS)) {
ret = ioctl(fd, BTRFS_IOC_QUOTA_RESCAN_WAIT, &args);
e = errno;
}
close_file_or_dir(fd, dirstream);
if (ioctlnum == BTRFS_IOC_QUOTA_RESCAN) {
if (ret < 0) {
fprintf(stderr, "ERROR: quota rescan failed: "
"%s\n", strerror(e));
return 1;
} else {
printf("quota rescan started\n");
}
} else {
if (!args.flags) {
printf("no rescan operation in progress\n");
} else {
printf("rescan operation running (current key %lld)\n",
args.progress);
}
}
return 0;
}
static int cmd_qgroup_limit(int argc, char **argv)
{
int ret = 0;
int fd;
int e;
char *path = NULL;
struct btrfs_ioctl_qgroup_limit_args args;
unsigned long long size;
int compressed = 0;
int exclusive = 0;
DIR *dirstream = NULL;
optind = 1;
while (1) {
int c = getopt(argc, argv, "ce");
if (c < 0)
break;
switch (c) {
case 'c':
compressed = 1;
break;
case 'e':
exclusive = 1;
break;
default:
usage(cmd_qgroup_limit_usage);
}
}
if (check_argc_min(argc - optind, 2))
usage(cmd_qgroup_limit_usage);
if (!parse_limit(argv[optind], &size)) {
error("invalid size argument: %s", argv[optind]);
return 1;
}
memset(&args, 0, sizeof(args));
if (compressed)
args.lim.flags |= BTRFS_QGROUP_LIMIT_RFER_CMPR |
BTRFS_QGROUP_LIMIT_EXCL_CMPR;
if (exclusive) {
args.lim.flags |= BTRFS_QGROUP_LIMIT_MAX_EXCL;
args.lim.max_exclusive = size;
} else {
args.lim.flags |= BTRFS_QGROUP_LIMIT_MAX_RFER;
args.lim.max_referenced = size;
}
if (argc - optind == 2) {
args.qgroupid = 0;
path = argv[optind + 1];
ret = test_issubvolume(path);
if (ret < 0) {
error("cannot access '%s': %s", path, strerror(-ret));
return 1;
}
if (!ret) {
error("'%s' is not a subvolume", path);
return 1;
}
/*
* keep qgroupid at 0, this indicates that the subvolume the
* fd refers to is to be limited
*/
} else if (argc - optind == 3) {
args.qgroupid = parse_qgroupid(argv[optind + 1]);
path = argv[optind + 2];
} else
usage(cmd_qgroup_limit_usage);
fd = btrfs_open_dir(path, &dirstream, 1);
if (fd < 0)
return 1;
ret = ioctl(fd, BTRFS_IOC_QGROUP_LIMIT, &args);
e = errno;
close_file_or_dir(fd, dirstream);
if (ret < 0) {
error("unable to limit requested quota group: %s", strerror(e));
return 1;
}
return 0;
}
static int cmd_subvol_create(int argc, char **argv)
{
int retval, res, len;
int fddst = -1;
char *dupname = NULL;
char *dupdir = NULL;
char *newname;
char *dstdir;
char *dst;
struct btrfs_qgroup_inherit *inherit = NULL;
DIR *dirstream = NULL;
while (1) {
int c = getopt(argc, argv, "c:i:");
if (c < 0)
break;
switch (c) {
case 'c':
res = qgroup_inherit_add_copy(&inherit, optarg, 0);
if (res) {
retval = res;
goto out;
}
break;
case 'i':
res = qgroup_inherit_add_group(&inherit, optarg);
if (res) {
retval = res;
goto out;
}
break;
default:
usage(cmd_subvol_create_usage);
}
}
if (check_argc_exact(argc - optind, 1))
usage(cmd_subvol_create_usage);
dst = argv[optind];
retval = 1; /* failure */
res = test_isdir(dst);
if (res < 0 && res != -ENOENT) {
error("cannot access %s: %s", dst, strerror(-res));
goto out;
}
if (res >= 0) {
error("target path already exists: %s", dst);
goto out;
}
dupname = strdup(dst);
newname = basename(dupname);
dupdir = strdup(dst);
dstdir = dirname(dupdir);
if (!test_issubvolname(newname)) {
error("invalid subvolume name: %s", newname);
goto out;
}
len = strlen(newname);
if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
error("subvolume name too long: %s", newname);
goto out;
}
fddst = btrfs_open_dir(dstdir, &dirstream, 1);
if (fddst < 0)
goto out;
printf("Create subvolume '%s/%s'\n", dstdir, newname);
if (inherit) {
struct btrfs_ioctl_vol_args_v2 args;
memset(&args, 0, sizeof(args));
strncpy_null(args.name, newname);
args.flags |= BTRFS_SUBVOL_QGROUP_INHERIT;
args.size = qgroup_inherit_size(inherit);
args.qgroup_inherit = inherit;
res = ioctl(fddst, BTRFS_IOC_SUBVOL_CREATE_V2, &args);
} else {
struct btrfs_ioctl_vol_args args;
memset(&args, 0, sizeof(args));
strncpy_null(args.name, newname);
res = ioctl(fddst, BTRFS_IOC_SUBVOL_CREATE, &args);
}
if (res < 0) {
error("cannot create subvolume: %s", strerror(errno));
goto out;
}
retval = 0; /* success */
out:
close_file_or_dir(fddst, dirstream);
free(inherit);
free(dupname);
free(dupdir);
return retval;
}
