mirror of
https://github.com/kdave/btrfs-progs
synced 2024-12-10 16:37:07 +00:00
e4df433b8a
As btrfs is specific to Linux, %m can be used instead of strerror(errno) in format strings. This has some size reduction benefits for embedded systems. glibc, musl, and uclibc-ng all support %m as a modifier to printf. A quick glance at the BIONIC libc source indicates that it has support for %m as well. BSDs and Windows do not but I do believe them to be beyond the scope of btrfs-progs. Compiled sizes on Ubuntu 16.04: Before: 3916512 btrfs 233688 libbtrfs.so.0.1 4899 bcp 2367672 btrfs-convert 2208488 btrfs-corrupt-block 13302 btrfs-debugfs 2152160 btrfs-debug-tree 2136024 btrfs-find-root 2287592 btrfs-image 2144600 btrfs-map-logical 2130760 btrfs-select-super 2152608 btrfstune 2131760 btrfs-zero-log 2277752 mkfs.btrfs 9166 show-blocks After: 3908744 btrfs 233256 libbtrfs.so.0.1 4899 bcp 2366560 btrfs-convert 2207432 btrfs-corrupt-block 13302 btrfs-debugfs 2151104 btrfs-debug-tree 2134968 btrfs-find-root 2281864 btrfs-image 2143536 btrfs-map-logical 2129704 btrfs-select-super 2151552 btrfstune 2130696 btrfs-zero-log 2276272 mkfs.btrfs 9166 show-blocks Total savings: 23928 (24 kilo)bytes Signed-off-by: Rosen Penev <rosenp@gmail.com> Signed-off-by: David Sterba <dsterba@suse.com>
616 lines
14 KiB
C
616 lines
14 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <getopt.h>
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#include "kerncompat.h"
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#include "ctree.h"
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#include "ioctl.h"
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#include "utils.h"
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#include "volumes.h"
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#include "cmds-fi-usage.h"
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#include "commands.h"
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#include "help.h"
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#include "mkfs/common.h"
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static const char * const device_cmd_group_usage[] = {
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"btrfs device <command> [<args>]",
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NULL
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};
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static const char * const cmd_device_add_usage[] = {
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"btrfs device add [options] <device> [<device>...] <path>",
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"Add a device to a filesystem",
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"-K|--nodiscard do not perform whole device TRIM",
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"-f|--force force overwrite existing filesystem on the disk",
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NULL
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};
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static int cmd_device_add(int argc, char **argv)
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{
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char *mntpnt;
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int i, fdmnt, ret = 0;
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DIR *dirstream = NULL;
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int discard = 1;
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int force = 0;
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int last_dev;
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while (1) {
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int c;
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static const struct option long_options[] = {
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{ "nodiscard", optional_argument, NULL, 'K'},
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{ "force", no_argument, NULL, 'f'},
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{ NULL, 0, NULL, 0}
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};
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c = getopt_long(argc, argv, "Kf", long_options, NULL);
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if (c < 0)
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break;
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switch (c) {
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case 'K':
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discard = 0;
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break;
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case 'f':
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force = 1;
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break;
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default:
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usage(cmd_device_add_usage);
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}
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}
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if (check_argc_min(argc - optind, 2))
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usage(cmd_device_add_usage);
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last_dev = argc - 1;
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mntpnt = argv[last_dev];
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fdmnt = btrfs_open_dir(mntpnt, &dirstream, 1);
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if (fdmnt < 0)
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return 1;
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for (i = optind; i < last_dev; i++){
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struct btrfs_ioctl_vol_args ioctl_args;
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int devfd, res;
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u64 dev_block_count = 0;
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char *path;
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res = test_dev_for_mkfs(argv[i], force);
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if (res) {
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ret++;
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continue;
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}
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devfd = open(argv[i], O_RDWR);
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if (devfd < 0) {
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error("unable to open device '%s'", argv[i]);
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ret++;
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continue;
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}
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res = btrfs_prepare_device(devfd, argv[i], &dev_block_count, 0,
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PREP_DEVICE_ZERO_END | PREP_DEVICE_VERBOSE |
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(discard ? PREP_DEVICE_DISCARD : 0));
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close(devfd);
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if (res) {
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ret++;
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goto error_out;
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}
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path = canonicalize_path(argv[i]);
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if (!path) {
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error("could not canonicalize pathname '%s': %m",
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argv[i]);
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ret++;
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goto error_out;
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}
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memset(&ioctl_args, 0, sizeof(ioctl_args));
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strncpy_null(ioctl_args.name, path);
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res = ioctl(fdmnt, BTRFS_IOC_ADD_DEV, &ioctl_args);
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if (res < 0) {
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error("error adding device '%s': %m", path);
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ret++;
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}
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free(path);
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}
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error_out:
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close_file_or_dir(fdmnt, dirstream);
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return !!ret;
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}
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static int _cmd_device_remove(int argc, char **argv,
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const char * const *usagestr)
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{
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char *mntpnt;
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int i, fdmnt, ret = 0;
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DIR *dirstream = NULL;
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clean_args_no_options(argc, argv, usagestr);
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if (check_argc_min(argc - optind, 2))
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usage(usagestr);
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mntpnt = argv[argc - 1];
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fdmnt = btrfs_open_dir(mntpnt, &dirstream, 1);
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if (fdmnt < 0)
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return 1;
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for(i = optind; i < argc - 1; i++) {
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struct btrfs_ioctl_vol_args arg;
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struct btrfs_ioctl_vol_args_v2 argv2 = {0};
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int is_devid = 0;
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int res;
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if (string_is_numerical(argv[i])) {
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argv2.devid = arg_strtou64(argv[i]);
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argv2.flags = BTRFS_DEVICE_SPEC_BY_ID;
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is_devid = 1;
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} else if (is_block_device(argv[i]) == 1 ||
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strcmp(argv[i], "missing") == 0) {
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strncpy_null(argv2.name, argv[i]);
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} else {
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error("not a block device: %s", argv[i]);
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ret++;
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continue;
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}
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/*
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* Positive values are from BTRFS_ERROR_DEV_*,
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* otherwise it's a generic error, one of errnos
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*/
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res = ioctl(fdmnt, BTRFS_IOC_RM_DEV_V2, &argv2);
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/*
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* If BTRFS_IOC_RM_DEV_V2 is not supported we get ENOTTY and if
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* argv2.flags includes a flag which kernel doesn't understand then
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* we shall get EOPNOTSUPP
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*/
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if (res < 0 && (errno == ENOTTY || errno == EOPNOTSUPP)) {
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if (is_devid) {
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error("device delete by id failed: %m");
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ret++;
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continue;
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}
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memset(&arg, 0, sizeof(arg));
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strncpy_null(arg.name, argv[i]);
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res = ioctl(fdmnt, BTRFS_IOC_RM_DEV, &arg);
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}
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if (res) {
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const char *msg;
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if (res > 0)
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msg = btrfs_err_str(res);
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else
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msg = strerror(errno);
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if (is_devid) {
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error("error removing devid %llu: %s",
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(unsigned long long)argv2.devid, msg);
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} else {
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error("error removing device '%s': %s",
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argv[i], msg);
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}
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ret++;
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}
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}
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close_file_or_dir(fdmnt, dirstream);
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return !!ret;
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}
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#define COMMON_USAGE_REMOVE_DELETE \
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"If 'missing' is specified for <device>, the first device that is", \
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"described by the filesystem metadata, but not present at the mount", \
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"time will be removed. (only in degraded mode)"
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static const char * const cmd_device_remove_usage[] = {
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"btrfs device remove <device>|<devid> [<device>|<devid>...] <path>",
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"Remove a device from a filesystem",
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"",
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COMMON_USAGE_REMOVE_DELETE,
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NULL
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};
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static int cmd_device_remove(int argc, char **argv)
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{
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return _cmd_device_remove(argc, argv, cmd_device_remove_usage);
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}
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static const char * const cmd_device_delete_usage[] = {
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"btrfs device delete <device>|<devid> [<device>|<devid>...] <path>",
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"Remove a device from a filesystem (alias of \"btrfs device remove\")",
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"",
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COMMON_USAGE_REMOVE_DELETE,
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NULL
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};
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static int cmd_device_delete(int argc, char **argv)
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{
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return _cmd_device_remove(argc, argv, cmd_device_delete_usage);
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}
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static const char * const cmd_device_scan_usage[] = {
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"btrfs device scan [(-d|--all-devices)|<device> [<device>...]]",
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"Scan devices for a btrfs filesystem",
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" -d|--all-devices (deprecated)",
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NULL
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};
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static int cmd_device_scan(int argc, char **argv)
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{
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int i;
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int devstart;
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int all = 0;
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int ret = 0;
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while (1) {
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int c;
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static const struct option long_options[] = {
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{ "all-devices", no_argument, NULL, 'd'},
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{ NULL, 0, NULL, 0}
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};
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c = getopt_long(argc, argv, "d", long_options, NULL);
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if (c < 0)
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break;
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switch (c) {
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case 'd':
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all = 1;
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break;
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default:
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usage(cmd_device_scan_usage);
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}
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}
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devstart = optind;
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if (all && check_argc_max(argc - optind, 1))
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usage(cmd_device_scan_usage);
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if (all || argc - optind == 0) {
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printf("Scanning for Btrfs filesystems\n");
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ret = btrfs_scan_devices();
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error_on(ret, "error %d while scanning", ret);
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ret = btrfs_register_all_devices();
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error_on(ret, "there are %d errors while registering devices", ret);
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goto out;
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}
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for( i = devstart ; i < argc ; i++ ){
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char *path;
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if (is_block_device(argv[i]) != 1) {
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error("not a block device: %s", argv[i]);
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ret = 1;
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goto out;
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}
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path = canonicalize_path(argv[i]);
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if (!path) {
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error("could not canonicalize path '%s': %m", argv[i]);
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ret = 1;
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goto out;
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}
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printf("Scanning for Btrfs filesystems in '%s'\n", path);
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if (btrfs_register_one_device(path) != 0) {
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ret = 1;
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free(path);
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goto out;
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}
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free(path);
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}
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out:
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return !!ret;
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}
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static const char * const cmd_device_ready_usage[] = {
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"btrfs device ready <device>",
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"Check device to see if it has all of its devices in cache for mounting",
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NULL
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};
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static int cmd_device_ready(int argc, char **argv)
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{
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struct btrfs_ioctl_vol_args args;
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int fd;
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int ret;
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char *path;
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clean_args_no_options(argc, argv, cmd_device_ready_usage);
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if (check_argc_exact(argc - optind, 1))
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usage(cmd_device_ready_usage);
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fd = open("/dev/btrfs-control", O_RDWR);
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if (fd < 0) {
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perror("failed to open /dev/btrfs-control");
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return 1;
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}
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path = canonicalize_path(argv[optind]);
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if (!path) {
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error("could not canonicalize pathname '%s': %m",
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argv[optind]);
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ret = 1;
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goto out;
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}
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if (is_block_device(path) != 1) {
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error("not a block device: %s", path);
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ret = 1;
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goto out;
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}
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memset(&args, 0, sizeof(args));
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strncpy_null(args.name, path);
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ret = ioctl(fd, BTRFS_IOC_DEVICES_READY, &args);
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if (ret < 0) {
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error("unable to determine if device '%s' is ready for mount: %m",
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path);
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ret = 1;
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}
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out:
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free(path);
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close(fd);
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return ret;
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}
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static const char * const cmd_device_stats_usage[] = {
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"btrfs device stats [options] <path>|<device>",
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"Show device IO error statistics",
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"Show device IO error statistics for all devices of the given filesystem",
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"identified by PATH or DEVICE. The filesystem must be mounted.",
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"",
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"-c|--check return non-zero if any stat counter is not zero",
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"-z|--reset show current stats and reset values to zero",
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NULL
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};
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static int cmd_device_stats(int argc, char **argv)
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{
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char *dev_path;
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struct btrfs_ioctl_fs_info_args fi_args;
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struct btrfs_ioctl_dev_info_args *di_args = NULL;
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int ret;
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int fdmnt;
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int i;
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int err = 0;
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int check = 0;
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__u64 flags = 0;
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DIR *dirstream = NULL;
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while (1) {
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int c;
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static const struct option long_options[] = {
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{"check", no_argument, NULL, 'c'},
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{"reset", no_argument, NULL, 'z'},
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{NULL, 0, NULL, 0}
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};
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c = getopt_long(argc, argv, "cz", long_options, NULL);
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if (c < 0)
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break;
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switch (c) {
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case 'c':
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check = 1;
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break;
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case 'z':
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flags = BTRFS_DEV_STATS_RESET;
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break;
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case '?':
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default:
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usage(cmd_device_stats_usage);
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}
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}
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if (check_argc_exact(argc - optind, 1))
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usage(cmd_device_stats_usage);
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dev_path = argv[optind];
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fdmnt = open_path_or_dev_mnt(dev_path, &dirstream, 1);
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if (fdmnt < 0)
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return 1;
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ret = get_fs_info(dev_path, &fi_args, &di_args);
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if (ret) {
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error("getting device info for %s failed: %s", dev_path,
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strerror(-ret));
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err = 1;
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goto out;
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}
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if (!fi_args.num_devices) {
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error("no devices found");
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err = 1;
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goto out;
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}
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for (i = 0; i < fi_args.num_devices; i++) {
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struct btrfs_ioctl_get_dev_stats args = {0};
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char path[BTRFS_DEVICE_PATH_NAME_MAX + 1];
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strncpy(path, (char *)di_args[i].path,
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BTRFS_DEVICE_PATH_NAME_MAX);
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path[BTRFS_DEVICE_PATH_NAME_MAX] = 0;
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args.devid = di_args[i].devid;
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args.nr_items = BTRFS_DEV_STAT_VALUES_MAX;
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args.flags = flags;
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if (ioctl(fdmnt, BTRFS_IOC_GET_DEV_STATS, &args) < 0) {
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error("device stats ioctl failed on %s: %m",
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path);
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err |= 1;
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} else {
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char *canonical_path;
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int j;
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static const struct {
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const char name[32];
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u64 num;
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} dev_stats[] = {
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{ "write_io_errs", BTRFS_DEV_STAT_WRITE_ERRS },
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{ "read_io_errs", BTRFS_DEV_STAT_READ_ERRS },
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{ "flush_io_errs", BTRFS_DEV_STAT_FLUSH_ERRS },
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{ "corruption_errs",
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BTRFS_DEV_STAT_CORRUPTION_ERRS },
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{ "generation_errs",
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BTRFS_DEV_STAT_GENERATION_ERRS },
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};
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canonical_path = canonicalize_path(path);
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/* No path when device is missing. */
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if (!canonical_path) {
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canonical_path = malloc(32);
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if (!canonical_path) {
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error("not enough memory for path buffer");
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goto out;
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}
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snprintf(canonical_path, 32,
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"devid:%llu", args.devid);
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}
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for (j = 0; j < ARRAY_SIZE(dev_stats); j++) {
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/* We got fewer items than we know */
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if (args.nr_items < dev_stats[j].num + 1)
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continue;
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printf("[%s].%-16s %llu\n", canonical_path,
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dev_stats[j].name,
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(unsigned long long)
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args.values[dev_stats[j].num]);
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if ((check == 1)
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&& (args.values[dev_stats[j].num] > 0))
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err |= 64;
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}
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|
|
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(&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);
|
|
}
|