mirror of
https://github.com/kdave/btrfs-progs
synced 2024-12-25 07:32:22 +00:00
d57dff4183
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
401 lines
9.2 KiB
C
401 lines
9.2 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 "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 "commands.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_add_dev_usage[] = {
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"btrfs device add <device> [<device>...] <path>",
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"Add a device to a filesystem",
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NULL
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};
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static int cmd_add_dev(int argc, char **argv)
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{
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char *mntpnt;
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int i, fdmnt, ret=0, e;
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DIR *dirstream = NULL;
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if (check_argc_min(argc, 3))
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usage(cmd_add_dev_usage);
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mntpnt = argv[argc - 1];
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fdmnt = open_file_or_dir(mntpnt, &dirstream);
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if (fdmnt < 0) {
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fprintf(stderr, "ERROR: can't access to '%s'\n", mntpnt);
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return 1;
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}
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for (i = 1; i < argc - 1; 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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struct stat st;
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int mixed = 0;
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res = check_mounted(argv[i]);
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if (res < 0) {
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fprintf(stderr, "error checking %s mount status\n",
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argv[i]);
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ret++;
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continue;
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}
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if (res == 1) {
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fprintf(stderr, "%s is mounted\n", argv[i]);
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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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fprintf(stderr, "ERROR: Unable to open device '%s'\n", argv[i]);
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ret++;
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continue;
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}
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res = fstat(devfd, &st);
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if (res) {
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fprintf(stderr, "ERROR: Unable to stat '%s'\n", argv[i]);
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close(devfd);
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ret++;
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continue;
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}
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if (!S_ISBLK(st.st_mode)) {
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fprintf(stderr, "ERROR: '%s' is not a block device\n", argv[i]);
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close(devfd);
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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], 1, &dev_block_count,
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0, &mixed, 0);
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if (res) {
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fprintf(stderr, "ERROR: Unable to init '%s'\n", argv[i]);
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close(devfd);
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ret++;
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continue;
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}
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close(devfd);
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strncpy_null(ioctl_args.name, argv[i]);
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res = ioctl(fdmnt, BTRFS_IOC_ADD_DEV, &ioctl_args);
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e = errno;
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if(res<0){
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fprintf(stderr, "ERROR: error adding the device '%s' - %s\n",
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argv[i], strerror(e));
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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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static const char * const cmd_rm_dev_usage[] = {
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"btrfs device delete <device> [<device>...] <path>",
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"Remove a device from a filesystem",
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NULL
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};
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static int cmd_rm_dev(int argc, char **argv)
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{
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char *mntpnt;
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int i, fdmnt, ret=0, e;
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DIR *dirstream = NULL;
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if (check_argc_min(argc, 3))
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usage(cmd_rm_dev_usage);
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mntpnt = argv[argc - 1];
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fdmnt = open_file_or_dir(mntpnt, &dirstream);
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if (fdmnt < 0) {
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fprintf(stderr, "ERROR: can't access to '%s'\n", mntpnt);
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return 1;
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}
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for(i=1 ; i < argc - 1; i++ ){
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struct btrfs_ioctl_vol_args arg;
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int res;
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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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e = errno;
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if (res > 0) {
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fprintf(stderr,
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"ERROR: error removing the device '%s' - %s\n",
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argv[i], btrfs_err_str(res));
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ret++;
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} else if (res < 0) {
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fprintf(stderr,
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"ERROR: error removing the device '%s' - %s\n",
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argv[i], strerror(e));
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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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static const char * const cmd_scan_dev_usage[] = {
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"btrfs device scan [<--all-devices>|<device> [<device>...]]",
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"Scan devices for a btrfs filesystem",
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NULL
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};
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static int cmd_scan_dev(int argc, char **argv)
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{
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int i, fd, e;
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int where = BTRFS_SCAN_PROC;
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int devstart = 1;
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if( argc > 1 && !strcmp(argv[1],"--all-devices")){
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if (check_argc_max(argc, 2))
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usage(cmd_scan_dev_usage);
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where = BTRFS_SCAN_DEV;
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devstart += 1;
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}
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if(argc<=devstart){
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int ret;
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printf("Scanning for Btrfs filesystems\n");
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ret = scan_for_btrfs(where, 1);
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if (ret){
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fprintf(stderr, "ERROR: error %d while scanning\n", ret);
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return 1;
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}
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return 0;
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}
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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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for( i = devstart ; i < argc ; i++ ){
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struct btrfs_ioctl_vol_args args;
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int ret;
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printf("Scanning for Btrfs filesystems in '%s'\n", argv[i]);
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strncpy_null(args.name, argv[i]);
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/*
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* FIXME: which are the error code returned by this ioctl ?
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* it seems that is impossible to understand if there no is
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* a btrfs filesystem from an I/O error !!!
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*/
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ret = ioctl(fd, BTRFS_IOC_SCAN_DEV, &args);
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e = errno;
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if( ret < 0 ){
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close(fd);
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fprintf(stderr, "ERROR: unable to scan the device '%s' - %s\n",
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argv[i], strerror(e));
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return 1;
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}
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}
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close(fd);
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return 0;
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}
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static const char * const cmd_ready_dev_usage[] = {
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"btrfs device ready <device>",
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"Check device to see if it has all of it's devices in cache for mounting",
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NULL
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};
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static int cmd_ready_dev(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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if (check_argc_min(argc, 2))
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usage(cmd_ready_dev_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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strncpy(args.name, argv[argc - 1], BTRFS_PATH_NAME_MAX);
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ret = ioctl(fd, BTRFS_IOC_DEVICES_READY, &args);
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if (ret < 0) {
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fprintf(stderr, "ERROR: unable to determine if the device '%s'"
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" is ready for mounting - %s\n", argv[argc - 1],
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strerror(errno));
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ret = 1;
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}
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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_dev_stats_usage[] = {
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"btrfs device stats [-z] <path>|<device>",
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"Show current device IO stats. -z to reset stats afterwards.",
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NULL
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};
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static int cmd_dev_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 c;
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int err = 0;
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__u64 flags = 0;
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DIR *dirstream = NULL;
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optind = 1;
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while ((c = getopt(argc, argv, "z")) != -1) {
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switch (c) {
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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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fprintf(stderr, "ERROR: device stat args invalid.\n"
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" device stat [-z] <path>|<device>\n"
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" -z to reset stats after reading.\n");
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return 1;
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}
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}
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if (optind + 1 != argc) {
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fprintf(stderr, "ERROR: device stat needs path|device as single"
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" argument\n");
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return 1;
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}
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dev_path = argv[optind];
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fdmnt = open_path_or_dev_mnt(dev_path, &dirstream);
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if (fdmnt < 0) {
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fprintf(stderr, "ERROR: can't access '%s'\n", dev_path);
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return 1;
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}
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ret = get_fs_info(dev_path, &fi_args, &di_args);
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if (ret) {
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fprintf(stderr, "ERROR: getting dev info for devstats failed: "
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"%s\n", 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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fprintf(stderr, "ERROR: no devices found\n");
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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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__u8 path[BTRFS_DEVICE_PATH_NAME_MAX + 1];
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strncpy((char *)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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fprintf(stderr,
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"ERROR: ioctl(BTRFS_IOC_GET_DEV_STATS) on %s failed: %s\n",
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path, strerror(errno));
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err = 1;
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} else {
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if (args.nr_items >= BTRFS_DEV_STAT_WRITE_ERRS + 1)
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printf("[%s].write_io_errs %llu\n",
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path,
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(unsigned long long) args.values[
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BTRFS_DEV_STAT_WRITE_ERRS]);
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if (args.nr_items >= BTRFS_DEV_STAT_READ_ERRS + 1)
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printf("[%s].read_io_errs %llu\n",
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path,
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(unsigned long long) args.values[
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BTRFS_DEV_STAT_READ_ERRS]);
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if (args.nr_items >= BTRFS_DEV_STAT_FLUSH_ERRS + 1)
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printf("[%s].flush_io_errs %llu\n",
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path,
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(unsigned long long) args.values[
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BTRFS_DEV_STAT_FLUSH_ERRS]);
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if (args.nr_items >= BTRFS_DEV_STAT_CORRUPTION_ERRS + 1)
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printf("[%s].corruption_errs %llu\n",
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path,
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(unsigned long long) args.values[
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BTRFS_DEV_STAT_CORRUPTION_ERRS]);
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if (args.nr_items >= BTRFS_DEV_STAT_GENERATION_ERRS + 1)
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printf("[%s].generation_errs %llu\n",
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path,
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(unsigned long long) args.values[
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BTRFS_DEV_STAT_GENERATION_ERRS]);
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}
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}
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out:
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free(di_args);
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close_file_or_dir(fdmnt, dirstream);
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return err;
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}
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const struct cmd_group device_cmd_group = {
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device_cmd_group_usage, NULL, {
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{ "add", cmd_add_dev, cmd_add_dev_usage, NULL, 0 },
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{ "delete", cmd_rm_dev, cmd_rm_dev_usage, NULL, 0 },
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{ "scan", cmd_scan_dev, cmd_scan_dev_usage, NULL, 0 },
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{ "ready", cmd_ready_dev, cmd_ready_dev_usage, NULL, 0 },
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{ "stats", cmd_dev_stats, cmd_dev_stats_usage, NULL, 0 },
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NULL_CMD_STRUCT
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}
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};
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int cmd_device(int argc, char **argv)
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{
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return handle_command_group(&device_cmd_group, argc, argv);
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}
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