| /* |
| * 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 "volumes.h" |
| #include "cmds-fi-usage.h" |
| |
| #include "commands.h" |
| #include "help.h" |
| #include "mkfs/common.h" |
| |
| static const char * const device_cmd_group_usage[] = { |
| "btrfs device <command> [<args>]", |
| NULL |
| }; |
| |
| static const char * const cmd_device_add_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_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; |
| } |
| |
| #define COMMON_USAGE_REMOVE_DELETE \ |
| "If 'missing' is specified for <device>, the first device that is", \ |
| "described by the filesystem metadata, but not present at the mount", \ |
| "time will be removed. (only in degraded mode)" |
| |
| static const char * const cmd_device_remove_usage[] = { |
| "btrfs device remove <device>|<devid> [<device>|<devid>...] <path>", |
| "Remove a device from a filesystem", |
| "", |
| COMMON_USAGE_REMOVE_DELETE, |
| NULL |
| }; |
| |
| static int cmd_device_remove(int argc, char **argv) |
| { |
| return _cmd_device_remove(argc, argv, cmd_device_remove_usage); |
| } |
| |
| static const char * const cmd_device_delete_usage[] = { |
| "btrfs device delete <device>|<devid> [<device>|<devid>...] <path>", |
| "Remove a device from a filesystem (alias of \"btrfs device remove\")", |
| "", |
| COMMON_USAGE_REMOVE_DELETE, |
| NULL |
| }; |
| |
| static int cmd_device_delete(int argc, char **argv) |
| { |
| return _cmd_device_remove(argc, argv, cmd_device_delete_usage); |
| } |
| |
| static const char * const cmd_device_scan_usage[] = { |
| "btrfs device scan [(-d|--all-devices)|<device> [<device>...]]", |
| "Scan devices for a btrfs filesystem", |
| " -d|--all-devices (deprecated)", |
| NULL |
| }; |
| |
| static int cmd_device_scan(int argc, char **argv) |
| { |
| int i; |
| int devstart; |
| int all = 0; |
| int ret = 0; |
| |
| optind = 0; |
| while (1) { |
| int c; |
| static const struct option long_options[] = { |
| { "all-devices", no_argument, NULL, 'd'}, |
| { NULL, 0, NULL, 0} |
| }; |
| |
| c = getopt_long(argc, argv, "d", long_options, NULL); |
| if (c < 0) |
| break; |
| switch (c) { |
| case 'd': |
| all = 1; |
| break; |
| default: |
| usage(cmd_device_scan_usage); |
| } |
| } |
| devstart = optind; |
| |
| if (all && check_argc_max(argc - optind, 1)) |
| usage(cmd_device_scan_usage); |
| |
| if (all || argc - optind == 0) { |
| printf("Scanning for Btrfs filesystems\n"); |
| ret = btrfs_scan_devices(); |
| error_on(ret, "error %d while scanning", ret); |
| ret = btrfs_register_all_devices(); |
| error_on(ret, "there are %d errors while registering devices", ret); |
| goto out; |
| } |
| |
| for( i = devstart ; i < argc ; i++ ){ |
| char *path; |
| |
| if (is_block_device(argv[i]) != 1) { |
| error("not a block device: %s", argv[i]); |
| ret = 1; |
| goto out; |
| } |
| path = canonicalize_path(argv[i]); |
| if (!path) { |
| error("could not canonicalize path '%s': %m", argv[i]); |
| 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_device_ready_usage[] = { |
| "btrfs device ready <device>", |
| "Check device to see if it has all of its devices in cache for mounting", |
| NULL |
| }; |
| |
| 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 const char * const cmd_device_stats_usage[] = { |
| "btrfs device stats [options] <path>|<device>", |
| "Show device IO error statistics", |
| "Show device IO error statistics for all devices of the given filesystem", |
| "identified by PATH or DEVICE. The filesystem must be mounted.", |
| "", |
| "-c|--check return non-zero if any stat counter is not zero", |
| "-z|--reset show current stats and reset values to zero", |
| NULL |
| }; |
| |
| static int cmd_device_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 err = 0; |
| int check = 0; |
| __u64 flags = 0; |
| DIR *dirstream = NULL; |
| |
| optind = 0; |
| while (1) { |
| int c; |
| static const struct option long_options[] = { |
| {"check", no_argument, NULL, 'c'}, |
| {"reset", no_argument, NULL, 'z'}, |
| {NULL, 0, NULL, 0} |
| }; |
| |
| c = getopt_long(argc, argv, "cz", long_options, NULL); |
| if (c < 0) |
| break; |
| |
| switch (c) { |
| case 'c': |
| check = 1; |
| break; |
| case 'z': |
| flags = BTRFS_DEV_STATS_RESET; |
| break; |
| case '?': |
| default: |
| usage(cmd_device_stats_usage); |
| } |
| } |
| |
| if (check_argc_exact(argc - optind, 1)) |
| usage(cmd_device_stats_usage); |
| |
| dev_path = argv[optind]; |
| |
| fdmnt = open_path_or_dev_mnt(dev_path, &dirstream, 1); |
| if (fdmnt < 0) |
| return 1; |
| |
| ret = get_fs_info(dev_path, &fi_args, &di_args); |
| if (ret) { |
| errno = -ret; |
| error("getting device info for %s failed: %m", dev_path); |
| err = 1; |
| goto out; |
| } |
| if (!fi_args.num_devices) { |
| error("no devices found"); |
| err = 1; |
| goto out; |
| } |
| |
| for (i = 0; i < fi_args.num_devices; i++) { |
| struct btrfs_ioctl_get_dev_stats args = {0}; |
| char path[BTRFS_DEVICE_PATH_NAME_MAX + 1]; |
| |
| strncpy(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) { |
| error("device stats ioctl failed on %s: %m", |
| path); |
| err |= 1; |
| } else { |
| char *canonical_path; |
| int j; |
| static const struct { |
| const char name[32]; |
| u64 num; |
| } dev_stats[] = { |
| { "write_io_errs", BTRFS_DEV_STAT_WRITE_ERRS }, |
| { "read_io_errs", BTRFS_DEV_STAT_READ_ERRS }, |
| { "flush_io_errs", BTRFS_DEV_STAT_FLUSH_ERRS }, |
| { "corruption_errs", |
| BTRFS_DEV_STAT_CORRUPTION_ERRS }, |
| { "generation_errs", |
| BTRFS_DEV_STAT_GENERATION_ERRS }, |
| }; |
| |
| canonical_path = canonicalize_path(path); |
| |
| /* No path when device is missing. */ |
| if (!canonical_path) { |
| canonical_path = malloc(32); |
| if (!canonical_path) { |
| error("not enough memory for path buffer"); |
| goto out; |
| } |
| snprintf(canonical_path, 32, |
| "devid:%llu", args.devid); |
| } |
| |
| for (j = 0; j < ARRAY_SIZE(dev_stats); j++) { |
| /* We got fewer items than we know */ |
| if (args.nr_items < dev_stats[j].num + 1) |
| continue; |
| printf("[%s].%-16s %llu\n", canonical_path, |
| dev_stats[j].name, |
| (unsigned long long) |
| args.values[dev_stats[j].num]); |
| if ((check == 1) |
| && (args.values[dev_stats[j].num] > 0)) |
| err |= 64; |
| } |
| |
| free(canonical_path); |
| } |
| } |
| |
| out: |
| free(di_args); |
| close_file_or_dir(fdmnt, dirstream); |
| |
| return err; |
| } |
| |
| static const char * const cmd_device_usage_usage[] = { |
| "btrfs device usage [options] <path> [<path>..]", |
| "Show detailed information about internal allocations in devices.", |
| HELPINFO_UNITS_SHORT_LONG, |
| NULL |
| }; |
| |
| static int _cmd_device_usage(int fd, const char *path, unsigned unit_mode) |
| { |
| int i; |
| int ret = 0; |
| struct chunk_info *chunkinfo = NULL; |
| struct device_info *devinfo = NULL; |
| int chunkcount = 0; |
| int devcount = 0; |
| |
| ret = load_chunk_and_device_info(fd, &chunkinfo, &chunkcount, &devinfo, |
| &devcount); |
| if (ret) |
| goto out; |
| |
| for (i = 0; i < devcount; i++) { |
| printf("%s, ID: %llu\n", devinfo[i].path, devinfo[i].devid); |
| print_device_sizes(&devinfo[i], unit_mode); |
| print_device_chunks(&devinfo[i], chunkinfo, chunkcount, |
| unit_mode); |
| printf("\n"); |
| } |
| |
| out: |
| free(devinfo); |
| free(chunkinfo); |
| |
| 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 const char device_cmd_group_info[] = |
| "manage and query devices in the filesystem"; |
| |
| const struct cmd_group device_cmd_group = { |
| device_cmd_group_usage, device_cmd_group_info, { |
| { "add", cmd_device_add, cmd_device_add_usage, NULL, 0 }, |
| { "delete", cmd_device_delete, cmd_device_delete_usage, NULL, |
| CMD_ALIAS }, |
| { "remove", cmd_device_remove, cmd_device_remove_usage, NULL, 0 }, |
| { "scan", cmd_device_scan, cmd_device_scan_usage, NULL, 0 }, |
| { "ready", cmd_device_ready, cmd_device_ready_usage, NULL, 0 }, |
| { "stats", cmd_device_stats, cmd_device_stats_usage, NULL, 0 }, |
| { "usage", cmd_device_usage, |
| cmd_device_usage_usage, NULL, 0 }, |
| NULL_CMD_STRUCT |
| } |
| }; |
| |
| int cmd_device(int argc, char **argv) |
| { |
| return handle_command_group(&device_cmd_group, argc, argv); |
| } |