| /* |
| * 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 "kerncompat.h" |
| #include "ctree.h" |
| #include "ioctl.h" |
| #include "utils.h" |
| |
| #include "commands.h" |
| |
| /* FIXME - imported cruft, fix sparse errors and warnings */ |
| #ifdef __CHECKER__ |
| #define BLKGETSIZE64 0 |
| #define BTRFS_IOC_SNAP_CREATE_V2 0 |
| #define BTRFS_VOL_NAME_MAX 255 |
| struct btrfs_ioctl_vol_args { char name[BTRFS_VOL_NAME_MAX]; }; |
| static inline int ioctl(int fd, int define, void *arg) { return 0; } |
| #endif |
| |
| static const char * const device_cmd_group_usage[] = { |
| "btrfs device <command> [<args>]", |
| NULL |
| }; |
| |
| static const char * const cmd_add_dev_usage[] = { |
| "btrfs device add <device> [<device>...] <path>", |
| "Add a device to a filesystem", |
| NULL |
| }; |
| |
| static int cmd_add_dev(int argc, char **argv) |
| { |
| char *mntpnt; |
| int i, fdmnt, ret=0, e; |
| |
| if (check_argc_min(argc, 3)) |
| usage(cmd_add_dev_usage); |
| |
| mntpnt = argv[argc - 1]; |
| |
| fdmnt = open_file_or_dir(mntpnt); |
| if (fdmnt < 0) { |
| fprintf(stderr, "ERROR: can't access to '%s'\n", mntpnt); |
| return 12; |
| } |
| |
| for (i = 1; i < argc - 1; i++ ){ |
| struct btrfs_ioctl_vol_args ioctl_args; |
| int devfd, res; |
| u64 dev_block_count = 0; |
| struct stat st; |
| int mixed = 0; |
| |
| res = check_mounted(argv[i]); |
| if (res < 0) { |
| fprintf(stderr, "error checking %s mount status\n", |
| argv[i]); |
| ret++; |
| continue; |
| } |
| if (res == 1) { |
| fprintf(stderr, "%s is mounted\n", argv[i]); |
| ret++; |
| continue; |
| } |
| |
| devfd = open(argv[i], O_RDWR); |
| if (!devfd) { |
| fprintf(stderr, "ERROR: Unable to open device '%s'\n", argv[i]); |
| close(devfd); |
| ret++; |
| continue; |
| } |
| res = fstat(devfd, &st); |
| if (res) { |
| fprintf(stderr, "ERROR: Unable to stat '%s'\n", argv[i]); |
| close(devfd); |
| ret++; |
| continue; |
| } |
| if (!S_ISBLK(st.st_mode)) { |
| fprintf(stderr, "ERROR: '%s' is not a block device\n", argv[i]); |
| close(devfd); |
| ret++; |
| continue; |
| } |
| |
| res = btrfs_prepare_device(devfd, argv[i], 1, &dev_block_count, &mixed); |
| if (res) { |
| fprintf(stderr, "ERROR: Unable to init '%s'\n", argv[i]); |
| close(devfd); |
| ret++; |
| continue; |
| } |
| close(devfd); |
| |
| strncpy(ioctl_args.name, argv[i], BTRFS_PATH_NAME_MAX); |
| ioctl_args.name[BTRFS_PATH_NAME_MAX-1] = 0; |
| res = ioctl(fdmnt, BTRFS_IOC_ADD_DEV, &ioctl_args); |
| e = errno; |
| if(res<0){ |
| fprintf(stderr, "ERROR: error adding the device '%s' - %s\n", |
| argv[i], strerror(e)); |
| ret++; |
| } |
| |
| } |
| |
| close(fdmnt); |
| if (ret) |
| return ret+20; |
| else |
| return 0; |
| } |
| |
| static const char * const cmd_rm_dev_usage[] = { |
| "btrfs device delete <device> [<device>...] <path>", |
| "Remove a device from a filesystem", |
| NULL |
| }; |
| |
| static int cmd_rm_dev(int argc, char **argv) |
| { |
| char *mntpnt; |
| int i, fdmnt, ret=0, e; |
| |
| if (check_argc_min(argc, 3)) |
| usage(cmd_rm_dev_usage); |
| |
| mntpnt = argv[argc - 1]; |
| |
| fdmnt = open_file_or_dir(mntpnt); |
| if (fdmnt < 0) { |
| fprintf(stderr, "ERROR: can't access to '%s'\n", mntpnt); |
| return 12; |
| } |
| |
| for(i=1 ; i < argc - 1; i++ ){ |
| struct btrfs_ioctl_vol_args arg; |
| int res; |
| |
| strncpy(arg.name, argv[i], BTRFS_PATH_NAME_MAX); |
| arg.name[BTRFS_PATH_NAME_MAX-1] = 0; |
| res = ioctl(fdmnt, BTRFS_IOC_RM_DEV, &arg); |
| e = errno; |
| if(res<0){ |
| fprintf(stderr, "ERROR: error removing the device '%s' - %s\n", |
| argv[i], strerror(e)); |
| ret++; |
| } |
| } |
| |
| close(fdmnt); |
| if( ret) |
| return ret+20; |
| else |
| return 0; |
| } |
| |
| static const char * const cmd_scan_dev_usage[] = { |
| "btrfs device scan [<device>...]", |
| "Scan devices for a btrfs filesystem", |
| NULL |
| }; |
| |
| static int cmd_scan_dev(int argc, char **argv) |
| { |
| int i, fd, e; |
| int checklist = 1; |
| int devstart = 1; |
| |
| if( argc > 1 && !strcmp(argv[1],"--all-devices")){ |
| if (check_argc_max(argc, 2)) |
| usage(cmd_scan_dev_usage); |
| |
| checklist = 0; |
| devstart += 1; |
| } |
| |
| if(argc<=devstart){ |
| |
| int ret; |
| |
| printf("Scanning for Btrfs filesystems\n"); |
| if(checklist) |
| ret = btrfs_scan_block_devices(1); |
| else |
| ret = btrfs_scan_one_dir("/dev", 1); |
| if (ret){ |
| fprintf(stderr, "ERROR: error %d while scanning\n", ret); |
| return 18; |
| } |
| return 0; |
| } |
| |
| fd = open("/dev/btrfs-control", O_RDWR); |
| if (fd < 0) { |
| perror("failed to open /dev/btrfs-control"); |
| return 10; |
| } |
| |
| for( i = devstart ; i < argc ; i++ ){ |
| struct btrfs_ioctl_vol_args args; |
| int ret; |
| |
| printf("Scanning for Btrfs filesystems in '%s'\n", argv[i]); |
| |
| strncpy(args.name, argv[i], BTRFS_PATH_NAME_MAX); |
| args.name[BTRFS_PATH_NAME_MAX-1] = 0; |
| /* |
| * FIXME: which are the error code returned by this ioctl ? |
| * it seems that is impossible to understand if there no is |
| * a btrfs filesystem from an I/O error !!! |
| */ |
| ret = ioctl(fd, BTRFS_IOC_SCAN_DEV, &args); |
| e = errno; |
| |
| if( ret < 0 ){ |
| close(fd); |
| fprintf(stderr, "ERROR: unable to scan the device '%s' - %s\n", |
| argv[i], strerror(e)); |
| return 11; |
| } |
| } |
| |
| close(fd); |
| return 0; |
| } |
| |
| const struct cmd_group device_cmd_group = { |
| device_cmd_group_usage, NULL, { |
| { "add", cmd_add_dev, cmd_add_dev_usage, NULL, 0 }, |
| { "delete", cmd_rm_dev, cmd_rm_dev_usage, NULL, 0 }, |
| { "scan", cmd_scan_dev, cmd_scan_dev_usage, NULL, 0 }, |
| { 0, 0, 0, 0, 0 } |
| } |
| }; |
| |
| int cmd_device(int argc, char **argv) |
| { |
| return handle_command_group(&device_cmd_group, argc, argv); |
| } |