274 lines
6.6 KiB
C
274 lines
6.6 KiB
C
/*
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* Copyright (C) 2007 Oracle. All rights reserved.
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*
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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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#ifndef __CHECKER__
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#include <sys/ioctl.h>
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#include <sys/mount.h>
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#include "ioctl.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <libgen.h>
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#include <stdlib.h>
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#include "kerncompat.h"
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#include "ctree.h"
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#include "transaction.h"
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#include "utils.h"
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#include "version.h"
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#ifdef __CHECKER__
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#define BLKGETSIZE64 0
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#define BTRFS_IOC_SNAP_CREATE 0
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#define BTRFS_VOL_NAME_MAX 255
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struct btrfs_ioctl_vol_args { char name[BTRFS_VOL_NAME_MAX]; };
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static inline int ioctl(int fd, int define, void *arg) { return 0; }
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#endif
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static void print_usage(void)
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{
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printf("usage: btrfsctl [ -d file|dir] [ -s snap_name subvol|tree ]\n");
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printf(" [-r size] [-A device] [-a] [-c] [-D dir .]\n");
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printf("\t-d filename: defragments one file\n");
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printf("\t-d directory: defragments the entire Btree\n");
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printf("\t-s snap_name dir: creates a new snapshot of dir\n");
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printf("\t-S subvol_name dir: creates a new subvolume\n");
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printf("\t-r [+-]size[gkm]: resize the FS by size amount\n");
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printf("\t-A device: scans the device file for a Btrfs filesystem\n");
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printf("\t-a: scans all devices for Btrfs filesystems\n");
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printf("\t-c: forces a single FS sync\n");
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printf("\t-D: delete snapshot\n");
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printf("\t-m [tree id] directory: set the default mounted subvolume"
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" to the [tree id] or the directory\n");
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printf("%s\n", BTRFS_BUILD_VERSION);
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exit(1);
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}
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static int btrfsctl_open_file_or_dir(const char *fname)
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{
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int ret;
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struct stat st;
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DIR *dirstream;
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int fd;
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ret = stat(fname, &st);
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if (ret < 0) {
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perror("stat:");
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exit(1);
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}
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if (S_ISDIR(st.st_mode)) {
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dirstream = opendir(fname);
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if (!dirstream) {
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perror("opendir");
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exit(1);
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}
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fd = dirfd(dirstream);
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} else {
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fd = open(fname, O_RDWR);
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}
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if (fd < 0) {
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perror("open");
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exit(1);
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}
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return fd;
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}
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int main(int ac, char **av)
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{
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char *fname = NULL;
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char *snap_location = NULL;
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int snap_fd = 0;
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int fd;
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int ret;
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struct btrfs_ioctl_vol_args args;
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char *name = NULL;
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int i;
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unsigned long command = 0;
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int len;
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char *pos;
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char *fullpath;
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u64 objectid = 0;
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printf( "**\n"
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"** WARNING: this program is considered deprecated\n"
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"** Please consider to switch to the btrfs utility\n"
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"**\n");
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if (ac == 2 && strcmp(av[1], "-a") == 0) {
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fprintf(stderr, "Scanning for Btrfs filesystems\n");
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btrfs_scan_one_dir("/dev", 1);
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exit(0);
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}
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for (i = 1; i < ac; i++) {
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if (strcmp(av[i], "-s") == 0) {
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if (i + 1 >= ac - 1) {
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fprintf(stderr, "-s requires an arg");
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print_usage();
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}
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fullpath = av[i + 1];
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snap_location = strdup(fullpath);
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snap_location = dirname(snap_location);
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snap_fd = btrfsctl_open_file_or_dir(snap_location);
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name = strdup(fullpath);
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name = basename(name);
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len = strlen(name);
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if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
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fprintf(stderr,
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"snapshot name zero length or too long\n");
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exit(1);
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}
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if (strchr(name, '/')) {
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fprintf(stderr,
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"error: / not allowed in names\n");
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exit(1);
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}
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command = BTRFS_IOC_SNAP_CREATE;
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} else if (strcmp(av[i], "-S") == 0) {
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if (i + 1 >= ac - 1) {
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fprintf(stderr, "-S requires an arg");
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print_usage();
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}
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name = av[i + 1];
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len = strlen(name);
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if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
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fprintf(stderr,
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"snapshot name zero length or too long\n");
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exit(1);
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}
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if (strchr(name, '/')) {
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fprintf(stderr,
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"error: / not allowed in names\n");
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exit(1);
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}
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command = BTRFS_IOC_SUBVOL_CREATE;
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} else if (strcmp(av[i], "-d") == 0) {
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if (i >= ac - 1) {
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fprintf(stderr, "-d requires an arg\n");
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print_usage();
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}
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command = BTRFS_IOC_DEFRAG;
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} else if (strcmp(av[i], "-D") == 0) {
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if (i >= ac - 1) {
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fprintf(stderr, "-D requires an arg\n");
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print_usage();
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}
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command = BTRFS_IOC_SNAP_DESTROY;
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name = av[i + 1];
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len = strlen(name);
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pos = strchr(name, '/');
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if (pos) {
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if (*(pos + 1) == '\0')
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*(pos) = '\0';
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else {
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fprintf(stderr,
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"error: / not allowed in names\n");
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exit(1);
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}
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}
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if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
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fprintf(stderr, "-D size too long\n");
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exit(1);
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}
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} else if (strcmp(av[i], "-A") == 0) {
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if (i >= ac - 1) {
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fprintf(stderr, "-A requires an arg\n");
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print_usage();
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}
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command = BTRFS_IOC_SCAN_DEV;
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} else if (strcmp(av[i], "-r") == 0) {
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if (i >= ac - 1) {
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fprintf(stderr, "-r requires an arg\n");
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print_usage();
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}
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name = av[i + 1];
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len = strlen(name);
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if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
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fprintf(stderr, "-r size too long\n");
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exit(1);
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}
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command = BTRFS_IOC_RESIZE;
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} else if (strcmp(av[i], "-c") == 0) {
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command = BTRFS_IOC_SYNC;
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} else if (strcmp(av[i], "-m") == 0) {
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command = BTRFS_IOC_DEFAULT_SUBVOL;
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if (i == ac - 3) {
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objectid = (unsigned long long)
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strtoll(av[i + 1], NULL, 0);
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if (errno == ERANGE) {
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fprintf(stderr, "invalid tree id\n");
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exit(1);
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}
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}
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}
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}
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if (command == 0) {
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fprintf(stderr, "no valid commands given\n");
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print_usage();
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exit(1);
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}
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fname = av[ac - 1];
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if (command == BTRFS_IOC_SCAN_DEV) {
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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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exit(1);
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}
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name = fname;
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} else {
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fd = btrfsctl_open_file_or_dir(fname);
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}
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if (name)
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strncpy_null(args.name, name);
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else
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args.name[0] = '\0';
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if (command == BTRFS_IOC_SNAP_CREATE) {
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args.fd = fd;
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ret = ioctl(snap_fd, command, &args);
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} else if (command == BTRFS_IOC_DEFAULT_SUBVOL) {
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printf("objectid is %llu\n", (unsigned long long)objectid);
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ret = ioctl(fd, command, &objectid);
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} else
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ret = ioctl(fd, command, &args);
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if (ret < 0) {
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perror("ioctl:");
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exit(1);
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}
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if (ret == 0) {
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printf("operation complete\n");
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} else {
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printf("ioctl failed with error %d\n", ret);
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}
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printf("%s\n", BTRFS_BUILD_VERSION);
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if (ret)
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exit(1);
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return 0;
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}
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