+/*
+ * 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 <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
static inline int ioctl(int fd, int define, void *arg) { return 0; }
#endif
-void print_usage(void)
+static void print_usage(void)
{
- printf("usage: btrfsctl [ -s snapshot_name ] dir\n");
+ 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;
+ char *fname = NULL;
+ char *snap_location = NULL;
+ int snap_fd = 0;
int fd;
int ret;
struct btrfs_ioctl_vol_args args;
- char *name;
+ char *name = NULL;
int i;
+ unsigned long command = 0;
+ int len;
+ char *pos;
+ char *fullpath;
+ u64 objectid = 0;
- for (i = 1; i < ac - 1; i++) {
+ 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];
- if (strlen(name) >= BTRFS_VOL_NAME_MAX) {
- fprintf(stderr, "snapshot name is too long\n");
+ 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];
-printf("fname is %s\n", fname);
- fd = open(fname, O_RDWR);
- if (fd < 0) {
- perror("open");
+
+ 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);
+ args.name[BTRFS_PATH_NAME_MAX] = 0;
+ } 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);
}
- strcpy(args.name, name);
- ret = ioctl(fd, BTRFS_IOC_SNAP_CREATE, &args);
- printf("ioctl returns %d\n", ret);
+ 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;
}
projects / platform / upstream / btrfs-progs.git / blobdiff