| /* |
| * 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", |
| NULL |
| }; |
| |
| static int cmd_scan_dev(int argc, char **argv) |
| { |
| int i, fd, e; |
| int where = BTRFS_SCAN_LBLKID; |
| 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': |
| where = BTRFS_SCAN_DEV; |
| 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 = scan_for_btrfs(where, BTRFS_UPDATE_KERNEL); |
| if (ret) |
| fprintf(stderr, "ERROR: error %d while scanning\n", ret); |
| goto out; |
| } |
| |
| fd = open("/dev/btrfs-control", O_RDWR); |
| if (fd < 0) { |
| perror("failed to open /dev/btrfs-control"); |
| ret = 1; |
| goto out; |
| } |
| |
| for( i = devstart ; i < argc ; i++ ){ |
| struct btrfs_ioctl_vol_args args; |
| char *path; |
| |
| if (!is_block_device(argv[i])) { |
| fprintf(stderr, |
| "ERROR: %s is not a block device\n", argv[i]); |
| ret = 1; |
| goto close_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 close_out; |
| } |
| printf("Scanning for Btrfs filesystems in '%s'\n", path); |
| |
| strncpy_null(args.name, path); |
| /* |
| * FIXME: which are the error code returned by this ioctl ? |
| * it seems that is impossible to understand if there no is |
| * a btrfs filesystem from an I/O error !!! |
| */ |
| ret = ioctl(fd, BTRFS_IOC_SCAN_DEV, &args); |
| e = errno; |
| |
| if( ret < 0 ){ |
| fprintf(stderr, "ERROR: unable to scan the device '%s' - %s\n", |
| path, strerror(e)); |
| free(path); |
| goto close_out; |
| } |
| free(path); |
| } |
| |
| close_out: |
| close(fd); |
| 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); |
| } |