blob: 93239861c517b836be8c41ce32a1a3ea203433fd [file] [log] [blame]
/*
* 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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <sys/stat.h>
#include <getopt.h>
#include "kerncompat.h"
#include "ctree.h"
#include "ioctl.h"
#include "utils.h"
#include "commands.h"
static const char * const device_cmd_group_usage[] = {
"btrfs device <command> [<args>]",
NULL
};
static const char * const cmd_add_dev_usage[] = {
"btrfs device add [options] <device> [<device>...] <path>",
"Add a device to a filesystem",
"-K|--nodiscard do not perform whole device TRIM",
"-f|--force force overwrite existing filesystem on the disk",
NULL
};
static int cmd_add_dev(int argc, char **argv)
{
char *mntpnt;
int i, fdmnt, ret=0, e;
DIR *dirstream = NULL;
int discard = 1;
int force = 0;
char estr[100];
while (1) {
int long_index;
static struct option long_options[] = {
{ "nodiscard", optional_argument, NULL, 'K'},
{ "force", no_argument, NULL, 'f'},
{ 0, 0, 0, 0 }
};
int c = getopt_long(argc, argv, "Kf", long_options,
&long_index);
if (c < 0)
break;
switch (c) {
case 'K':
discard = 0;
break;
case 'f':
force = 1;
break;
default:
usage(cmd_add_dev_usage);
}
}
argc = argc - optind;
if (check_argc_min(argc, 2))
usage(cmd_add_dev_usage);
mntpnt = argv[optind + argc - 1];
fdmnt = open_file_or_dir(mntpnt, &dirstream);
if (fdmnt < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", mntpnt);
return 1;
}
for (i = optind; i < optind + argc - 1; i++){
struct btrfs_ioctl_vol_args ioctl_args;
int devfd, res;
u64 dev_block_count = 0;
int mixed = 0;
char *path;
res = test_dev_for_mkfs(argv[i], force, estr);
if (res) {
fprintf(stderr, "%s", estr);
ret++;
continue;
}
devfd = open(argv[i], O_RDWR);
if (devfd < 0) {
fprintf(stderr, "ERROR: Unable to open device '%s'\n", argv[i]);
ret++;
continue;
}
res = btrfs_prepare_device(devfd, argv[i], 1, &dev_block_count,
0, &mixed, discard);
close(devfd);
if (res) {
ret++;
goto error_out;
}
path = canonicalize_path(argv[i]);
if (!path) {
fprintf(stderr,
"ERROR: Could not canonicalize pathname '%s': %s\n",
argv[i], strerror(errno));
ret++;
goto error_out;
}
strncpy_null(ioctl_args.name, path);
res = ioctl(fdmnt, BTRFS_IOC_ADD_DEV, &ioctl_args);
e = errno;
if (res < 0) {
fprintf(stderr, "ERROR: error adding the device '%s' - %s\n",
path, strerror(e));
ret++;
}
free(path);
}
error_out:
close_file_or_dir(fdmnt, dirstream);
return !!ret;
}
static const char * const cmd_rm_dev_usage[] = {
"btrfs device delete <device> [<device>...] <path>",
"Remove a device from a filesystem",
NULL
};
static int cmd_rm_dev(int argc, char **argv)
{
char *mntpnt;
int i, fdmnt, ret=0, e;
DIR *dirstream = NULL;
if (check_argc_min(argc, 3))
usage(cmd_rm_dev_usage);
mntpnt = argv[argc - 1];
fdmnt = open_file_or_dir(mntpnt, &dirstream);
if (fdmnt < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", mntpnt);
return 1;
}
for(i=1 ; i < argc - 1; i++ ){
struct btrfs_ioctl_vol_args arg;
int res;
if (!is_block_device(argv[i])) {
fprintf(stderr,
"ERROR: %s is not a block device\n", argv[i]);
ret++;
continue;
}
strncpy_null(arg.name, argv[i]);
res = ioctl(fdmnt, BTRFS_IOC_RM_DEV, &arg);
e = errno;
if (res > 0) {
fprintf(stderr,
"ERROR: error removing the device '%s' - %s\n",
argv[i], btrfs_err_str(res));
ret++;
} else if (res < 0) {
fprintf(stderr,
"ERROR: error removing the device '%s' - %s\n",
argv[i], strerror(e));
ret++;
}
}
close_file_or_dir(fdmnt, dirstream);
return !!ret;
}
static const char * const cmd_scan_dev_usage[] = {
"btrfs device scan [(-d|--all-devices)|<device> [<device>...]]",
"Scan devices for a btrfs filesystem",
" -d|--all-devices (deprecated)",
NULL
};
static int cmd_scan_dev(int argc, char **argv)
{
int i;
int devstart = 1;
int all = 0;
int ret = 0;
optind = 1;
while (1) {
int long_index;
static struct option long_options[] = {
{ "all-devices", no_argument, NULL, 'd'},
{ 0, 0, 0, 0 },
};
int c = getopt_long(argc, argv, "d", long_options,
&long_index);
if (c < 0)
break;
switch (c) {
case 'd':
all = 1;
break;
default:
usage(cmd_scan_dev_usage);
}
}
if (all && check_argc_max(argc, 2))
usage(cmd_scan_dev_usage);
if (all || argc == 1) {
printf("Scanning for Btrfs filesystems\n");
ret = btrfs_scan_lblkid();
if (ret)
fprintf(stderr, "ERROR: error %d while scanning\n", ret);
ret = btrfs_register_all_devices();
if (ret)
fprintf(stderr, "ERROR: error %d while registering\n", ret);
goto out;
}
for( i = devstart ; i < argc ; i++ ){
char *path;
if (!is_block_device(argv[i])) {
fprintf(stderr,
"ERROR: %s is not a block device\n", argv[i]);
ret = 1;
goto out;
}
path = canonicalize_path(argv[i]);
if (!path) {
fprintf(stderr,
"ERROR: Could not canonicalize path '%s': %s\n",
argv[i], strerror(errno));
ret = 1;
goto out;
}
printf("Scanning for Btrfs filesystems in '%s'\n", path);
if (btrfs_register_one_device(path) != 0) {
ret = 1;
free(path);
goto out;
}
free(path);
}
out:
return !!ret;
}
static const char * const cmd_ready_dev_usage[] = {
"btrfs device ready <device>",
"Check device to see if it has all of its devices in cache for mounting",
NULL
};
static int cmd_ready_dev(int argc, char **argv)
{
struct btrfs_ioctl_vol_args args;
int fd;
int ret;
char *path;
if (check_argc_min(argc, 2))
usage(cmd_ready_dev_usage);
fd = open("/dev/btrfs-control", O_RDWR);
if (fd < 0) {
perror("failed to open /dev/btrfs-control");
return 1;
}
path = canonicalize_path(argv[argc - 1]);
if (!path) {
fprintf(stderr,
"ERROR: Could not canonicalize pathname '%s': %s\n",
argv[argc - 1], strerror(errno));
ret = 1;
goto out;
}
if (!is_block_device(path)) {
fprintf(stderr,
"ERROR: %s is not a block device\n", path);
ret = 1;
goto out;
}
strncpy(args.name, path, BTRFS_PATH_NAME_MAX);
ret = ioctl(fd, BTRFS_IOC_DEVICES_READY, &args);
if (ret < 0) {
fprintf(stderr, "ERROR: unable to determine if the device '%s'"
" is ready for mounting - %s\n", path,
strerror(errno));
ret = 1;
}
out:
free(path);
close(fd);
return ret;
}
static const char * const cmd_dev_stats_usage[] = {
"btrfs device stats [-z] <path>|<device>",
"Show current device IO stats. -z to reset stats afterwards.",
NULL
};
static int cmd_dev_stats(int argc, char **argv)
{
char *dev_path;
struct btrfs_ioctl_fs_info_args fi_args;
struct btrfs_ioctl_dev_info_args *di_args = NULL;
int ret;
int fdmnt;
int i;
int c;
int err = 0;
__u64 flags = 0;
DIR *dirstream = NULL;
optind = 1;
while ((c = getopt(argc, argv, "z")) != -1) {
switch (c) {
case 'z':
flags = BTRFS_DEV_STATS_RESET;
break;
case '?':
default:
usage(cmd_dev_stats_usage);
}
}
argc = argc - optind;
if (check_argc_exact(argc, 1))
usage(cmd_dev_stats_usage);
dev_path = argv[optind];
fdmnt = open_path_or_dev_mnt(dev_path, &dirstream);
if (fdmnt < 0) {
if (errno == EINVAL)
fprintf(stderr,
"ERROR: '%s' is not a mounted btrfs device\n",
dev_path);
else
fprintf(stderr, "ERROR: can't access '%s': %s\n",
dev_path, strerror(errno));
return 1;
}
ret = get_fs_info(dev_path, &fi_args, &di_args);
if (ret) {
fprintf(stderr, "ERROR: getting dev info for devstats failed: "
"%s\n", strerror(-ret));
err = 1;
goto out;
}
if (!fi_args.num_devices) {
fprintf(stderr, "ERROR: no devices found\n");
err = 1;
goto out;
}
for (i = 0; i < fi_args.num_devices; i++) {
struct btrfs_ioctl_get_dev_stats args = {0};
__u8 path[BTRFS_DEVICE_PATH_NAME_MAX + 1];
strncpy((char *)path, (char *)di_args[i].path,
BTRFS_DEVICE_PATH_NAME_MAX);
path[BTRFS_DEVICE_PATH_NAME_MAX] = '\0';
args.devid = di_args[i].devid;
args.nr_items = BTRFS_DEV_STAT_VALUES_MAX;
args.flags = flags;
if (ioctl(fdmnt, BTRFS_IOC_GET_DEV_STATS, &args) < 0) {
fprintf(stderr,
"ERROR: ioctl(BTRFS_IOC_GET_DEV_STATS) on %s failed: %s\n",
path, strerror(errno));
err = 1;
} else {
if (args.nr_items >= BTRFS_DEV_STAT_WRITE_ERRS + 1)
printf("[%s].write_io_errs %llu\n",
path,
(unsigned long long) args.values[
BTRFS_DEV_STAT_WRITE_ERRS]);
if (args.nr_items >= BTRFS_DEV_STAT_READ_ERRS + 1)
printf("[%s].read_io_errs %llu\n",
path,
(unsigned long long) args.values[
BTRFS_DEV_STAT_READ_ERRS]);
if (args.nr_items >= BTRFS_DEV_STAT_FLUSH_ERRS + 1)
printf("[%s].flush_io_errs %llu\n",
path,
(unsigned long long) args.values[
BTRFS_DEV_STAT_FLUSH_ERRS]);
if (args.nr_items >= BTRFS_DEV_STAT_CORRUPTION_ERRS + 1)
printf("[%s].corruption_errs %llu\n",
path,
(unsigned long long) args.values[
BTRFS_DEV_STAT_CORRUPTION_ERRS]);
if (args.nr_items >= BTRFS_DEV_STAT_GENERATION_ERRS + 1)
printf("[%s].generation_errs %llu\n",
path,
(unsigned long long) args.values[
BTRFS_DEV_STAT_GENERATION_ERRS]);
}
}
out:
free(di_args);
close_file_or_dir(fdmnt, dirstream);
return err;
}
const struct cmd_group device_cmd_group = {
device_cmd_group_usage, NULL, {
{ "add", cmd_add_dev, cmd_add_dev_usage, NULL, 0 },
{ "delete", cmd_rm_dev, cmd_rm_dev_usage, NULL, 0 },
{ "scan", cmd_scan_dev, cmd_scan_dev_usage, NULL, 0 },
{ "ready", cmd_ready_dev, cmd_ready_dev_usage, NULL, 0 },
{ "stats", cmd_dev_stats, cmd_dev_stats_usage, NULL, 0 },
NULL_CMD_STRUCT
}
};
int cmd_device(int argc, char **argv)
{
return handle_command_group(&device_cmd_group, argc, argv);
}