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-rw-r--r--cmds-device.c543
1 files changed, 543 insertions, 0 deletions
diff --git a/cmds-device.c b/cmds-device.c
new file mode 100644
index 00000000..50c1c5df
--- /dev/null
+++ b/cmds-device.c
@@ -0,0 +1,543 @@
+/*
+ * 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"
+
+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;
+
+ 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], 1, &dev_block_count,
+ 0, discard);
+ close(devfd);
+ if (res) {
+ ret++;
+ goto error_out;
+ }
+
+ path = canonicalize_path(argv[i]);
+ if (!path) {
+ error("could not canonicalize pathname '%s': %s",
+ argv[i], strerror(errno));
+ 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': %s",
+ path, strerror(errno));
+ 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;
+
+ if (check_argc_min(argc, 3))
+ usage(usagestr);
+
+ mntpnt = argv[argc - 1];
+
+ fdmnt = btrfs_open_dir(mntpnt, &dirstream, 1);
+ if (fdmnt < 0)
+ return 1;
+
+ for(i=1 ; i < argc - 1; i++ ){
+ struct btrfs_ioctl_vol_args arg;
+ int res;
+
+ if (is_block_device(argv[i]) != 1 && strcmp(argv[i], "missing")) {
+ error("not a block device: %s", argv[i]);
+ ret++;
+ continue;
+ }
+ memset(&arg, 0, sizeof(arg));
+ strncpy_null(arg.name, argv[i]);
+ /*
+ * Positive values are from BTRFS_ERROR_DEV_*,
+ * otherwise it's a generic error, one of errnos
+ */
+ 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);
+ error("error removing device '%s': %s",
+ argv[i], msg);
+ ret++;
+ }
+ }
+
+ close_file_or_dir(fdmnt, dirstream);
+ return !!ret;
+}
+
+static const char * const cmd_device_remove_usage[] = {
+ "btrfs device remove <device> [<device>...] <path>",
+ "Remove a device from a filesystem",
+ 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> [<device>...] <path>",
+ "Remove a device from a filesystem",
+ 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 = 1;
+ int all = 0;
+ int ret = 0;
+
+ optind = 1;
+ 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);
+ }
+ }
+
+ if (all && check_argc_max(argc, 2))
+ usage(cmd_device_scan_usage);
+
+ if (all || argc == 1) {
+ printf("Scanning for Btrfs filesystems\n");
+ ret = btrfs_scan_lblkid();
+ error_on(ret, "error %d while scanning", ret);
+ ret = btrfs_register_all_devices();
+ error_on(ret, "error %d 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': %s",
+ 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_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;
+
+ if (check_argc_min(argc, 2))
+ 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[argc - 1]);
+ if (!path) {
+ error("could not canonicalize pathname '%s': %s",
+ argv[argc - 1], strerror(errno));
+ 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: %s",
+ path, strerror(errno));
+ ret = 1;
+ }
+
+out:
+ free(path);
+ close(fd);
+ return ret;
+}
+
+static const char * const cmd_device_stats_usage[] = {
+ "btrfs device stats [-z] <path>|<device>",
+ "Show current device IO stats.",
+ "",
+ "-z 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 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_device_stats_usage);
+ }
+ }
+
+ argc = argc - optind;
+ if (check_argc_exact(argc, 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) {
+ error("getting dev info for devstats failed: %s",
+ strerror(-ret));
+ 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};
+ __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) {
+ error("DEV_STATS ioctl failed on %s: %s",
+ path, strerror(errno));
+ err = 1;
+ } else {
+ char *canonical_path;
+
+ canonical_path = canonicalize_path((char *)path);
+
+ if (args.nr_items >= BTRFS_DEV_STAT_WRITE_ERRS + 1)
+ printf("[%s].write_io_errs %llu\n",
+ canonical_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",
+ canonical_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",
+ canonical_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",
+ canonical_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",
+ canonical_path,
+ (unsigned long long) args.values[
+ BTRFS_DEV_STAT_GENERATION_ERRS]);
+
+ 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, 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(fd, &devinfo[i], unit_mode);
+ print_device_chunks(fd, &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);
+
+ if (check_argc_min(argc, 2) || argv[1][0] == '-')
+ usage(cmd_device_usage_usage);
+
+ for (i = 1; 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);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-25 14:25:24 +0000