| /* |
| * Copyright (C) 2007 Oracle. All rights reserved. |
| * |
| * 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. |
| */ |
| |
| #ifndef __CHECKER__ |
| #include <sys/ioctl.h> |
| #include <sys/mount.h> |
| #include "ioctl.h" |
| #endif |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <unistd.h> |
| #include <dirent.h> |
| #include <libgen.h> |
| #include <stdlib.h> |
| #include "kerncompat.h" |
| #include "ctree.h" |
| #include "transaction.h" |
| #include "utils.h" |
| #include "version.h" |
| |
| #ifdef __CHECKER__ |
| #define BLKGETSIZE64 0 |
| #define BTRFS_IOC_SNAP_CREATE 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 void print_usage(void) |
| { |
| printf("usage: btrfsctl [ -d file|dir] [ -s snap_name subvol|tree ]\n"); |
| printf(" [-r size] [-A device] [-a] [-c] [-D dir .]\n"); |
| printf("\t-d filename: defragments one file\n"); |
| printf("\t-d directory: defragments the entire Btree\n"); |
| printf("\t-s snap_name dir: creates a new snapshot of dir\n"); |
| printf("\t-S subvol_name dir: creates a new subvolume\n"); |
| printf("\t-r [+-]size[gkm]: resize the FS by size amount\n"); |
| printf("\t-A device: scans the device file for a Btrfs filesystem\n"); |
| printf("\t-a: scans all devices for Btrfs filesystems\n"); |
| printf("\t-c: forces a single FS sync\n"); |
| printf("\t-D: delete snapshot\n"); |
| printf("\t-m [tree id] directory: set the default mounted subvolume" |
| " to the [tree id] or the directory\n"); |
| printf("%s\n", BTRFS_BUILD_VERSION); |
| exit(1); |
| } |
| |
| static int open_file_or_dir(const char *fname) |
| { |
| int ret; |
| struct stat st; |
| DIR *dirstream; |
| int fd; |
| |
| ret = stat(fname, &st); |
| if (ret < 0) { |
| perror("stat:"); |
| exit(1); |
| } |
| if (S_ISDIR(st.st_mode)) { |
| dirstream = opendir(fname); |
| if (!dirstream) { |
| perror("opendir"); |
| exit(1); |
| } |
| fd = dirfd(dirstream); |
| } else { |
| fd = open(fname, O_RDWR); |
| } |
| if (fd < 0) { |
| perror("open"); |
| exit(1); |
| } |
| return fd; |
| } |
| int main(int ac, char **av) |
| { |
| char *fname = NULL; |
| char *snap_location = NULL; |
| int snap_fd = 0; |
| int fd; |
| int ret; |
| struct btrfs_ioctl_vol_args args; |
| char *name = NULL; |
| int i; |
| unsigned long command = 0; |
| int len; |
| char *pos; |
| char *fullpath; |
| u64 objectid = 0; |
| |
| printf( "**\n" |
| "** WARNING: this program is considered deprecated\n" |
| "** Please consider to switch to the btrfs utility\n" |
| "**\n"); |
| |
| if (ac == 2 && strcmp(av[1], "-a") == 0) { |
| fprintf(stderr, "Scanning for Btrfs filesystems\n"); |
| btrfs_scan_one_dir("/dev", 1); |
| exit(0); |
| } |
| for (i = 1; i < ac; i++) { |
| if (strcmp(av[i], "-s") == 0) { |
| if (i + 1 >= ac - 1) { |
| fprintf(stderr, "-s requires an arg"); |
| print_usage(); |
| } |
| fullpath = av[i + 1]; |
| |
| snap_location = strdup(fullpath); |
| snap_location = dirname(snap_location); |
| |
| snap_fd = open_file_or_dir(snap_location); |
| |
| name = strdup(fullpath); |
| name = basename(name); |
| len = strlen(name); |
| |
| if (len == 0 || len >= BTRFS_VOL_NAME_MAX) { |
| fprintf(stderr, |
| "snapshot name zero length or too long\n"); |
| exit(1); |
| } |
| if (strchr(name, '/')) { |
| fprintf(stderr, |
| "error: / not allowed in names\n"); |
| exit(1); |
| } |
| command = BTRFS_IOC_SNAP_CREATE; |
| } else if (strcmp(av[i], "-S") == 0) { |
| if (i + 1 >= ac - 1) { |
| fprintf(stderr, "-S requires an arg"); |
| print_usage(); |
| } |
| name = av[i + 1]; |
| len = strlen(name); |
| if (len == 0 || len >= BTRFS_VOL_NAME_MAX) { |
| fprintf(stderr, |
| "snapshot name zero length or too long\n"); |
| exit(1); |
| } |
| if (strchr(name, '/')) { |
| fprintf(stderr, |
| "error: / not allowed in names\n"); |
| exit(1); |
| } |
| command = BTRFS_IOC_SUBVOL_CREATE; |
| } else if (strcmp(av[i], "-d") == 0) { |
| if (i >= ac - 1) { |
| fprintf(stderr, "-d requires an arg\n"); |
| print_usage(); |
| } |
| command = BTRFS_IOC_DEFRAG; |
| } else if (strcmp(av[i], "-D") == 0) { |
| if (i >= ac - 1) { |
| fprintf(stderr, "-D requires an arg\n"); |
| print_usage(); |
| } |
| command = BTRFS_IOC_SNAP_DESTROY; |
| name = av[i + 1]; |
| len = strlen(name); |
| pos = strchr(name, '/'); |
| if (pos) { |
| if (*(pos + 1) == '\0') |
| *(pos) = '\0'; |
| else { |
| fprintf(stderr, |
| "error: / not allowed in names\n"); |
| exit(1); |
| } |
| } |
| if (len == 0 || len >= BTRFS_VOL_NAME_MAX) { |
| fprintf(stderr, "-D size too long\n"); |
| exit(1); |
| } |
| } else if (strcmp(av[i], "-A") == 0) { |
| if (i >= ac - 1) { |
| fprintf(stderr, "-A requires an arg\n"); |
| print_usage(); |
| } |
| command = BTRFS_IOC_SCAN_DEV; |
| } else if (strcmp(av[i], "-r") == 0) { |
| if (i >= ac - 1) { |
| fprintf(stderr, "-r requires an arg\n"); |
| print_usage(); |
| } |
| name = av[i + 1]; |
| len = strlen(name); |
| if (len == 0 || len >= BTRFS_VOL_NAME_MAX) { |
| fprintf(stderr, "-r size too long\n"); |
| exit(1); |
| } |
| command = BTRFS_IOC_RESIZE; |
| } else if (strcmp(av[i], "-c") == 0) { |
| command = BTRFS_IOC_SYNC; |
| } else if (strcmp(av[i], "-m") == 0) { |
| command = BTRFS_IOC_DEFAULT_SUBVOL; |
| if (i == ac - 3) { |
| objectid = (unsigned long long) |
| strtoll(av[i + 1], NULL, 0); |
| if (errno == ERANGE) { |
| fprintf(stderr, "invalid tree id\n"); |
| exit(1); |
| } |
| } |
| } |
| } |
| if (command == 0) { |
| fprintf(stderr, "no valid commands given\n"); |
| print_usage(); |
| exit(1); |
| } |
| fname = av[ac - 1]; |
| |
| if (command == BTRFS_IOC_SCAN_DEV) { |
| fd = open("/dev/btrfs-control", O_RDWR); |
| if (fd < 0) { |
| perror("failed to open /dev/btrfs-control"); |
| exit(1); |
| } |
| name = fname; |
| } else { |
| fd = open_file_or_dir(fname); |
| } |
| |
| if (name) |
| strncpy(args.name, name, BTRFS_PATH_NAME_MAX + 1); |
| else |
| args.name[0] = '\0'; |
| |
| if (command == BTRFS_IOC_SNAP_CREATE) { |
| args.fd = fd; |
| ret = ioctl(snap_fd, command, &args); |
| } else if (command == BTRFS_IOC_DEFAULT_SUBVOL) { |
| printf("objectid is %llu\n", (unsigned long long)objectid); |
| ret = ioctl(fd, command, &objectid); |
| } else |
| ret = ioctl(fd, command, &args); |
| if (ret < 0) { |
| perror("ioctl:"); |
| exit(1); |
| } |
| if (ret == 0) { |
| printf("operation complete\n"); |
| } else { |
| printf("ioctl failed with error %d\n", ret); |
| } |
| printf("%s\n", BTRFS_BUILD_VERSION); |
| if (ret) |
| exit(1); |
| |
| return 0; |
| } |
| |