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#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <libgen.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "libbcachefs/bcachefs.h"
#include "libbcachefs/bcachefs_ioctl.h"
#include "cmds.h"
#include "libbcachefs.h"
#include "libbcachefs/opts.h"
#include "tools-util.h"
int subvolume_usage(void)
{
puts("bcachefs subvolume - manage subvolumes and snapshots\n"
"Usage: bcachefs subvolume <CMD> [OPTION]\n"
"\n"
"Commands:\n"
" create create a subvolume\n"
" delete delete a subvolume\n"
" snapshot create a snapshot\n"
"\n"
"Report bugs to <linux-bcachefs@vger.kernel.org>");
return 0;
}
static void subvolume_create_usage(void)
{
puts("bcachefs subvolume create - create a new subvolume\n"
"Usage: bcachefs subvolume create [OPTION]... path\n"
"\n"
"Options:\n"
" -h, --help Display this help and exit\n"
"\n"
"Report bugs to <linux-bcachefs@vger.kernel.org>");
}
int cmd_subvolume_create(int argc, char *argv[])
{
static const struct option longopts[] = {
{ "help", no_argument, NULL, 'h' },
{ NULL }
};
char *path;
int opt;
while ((opt = getopt_long(argc, argv, "h", longopts, NULL)) != -1)
switch (opt) {
case 'h':
subvolume_create_usage();
exit(EXIT_SUCCESS);
}
args_shift(optind);
while ((path = arg_pop())) {
char *dir = dirname(strdup(path));
struct bchfs_handle fs = bcache_fs_open(dir);
struct bch_ioctl_subvolume i = {
.dirfd = AT_FDCWD,
.mode = 0777,
.dst_ptr = (unsigned long)path,
};
xioctl(fs.ioctl_fd, BCH_IOCTL_SUBVOLUME_CREATE, &i);
bcache_fs_close(fs);
}
return 0;
}
static void subvolume_delete_usage(void)
{
puts("bcachefs subvolume delete - delete an existing subvolume\n"
"Usage: bcachefs subvolume delete [OPTION]... path\n"
"\n"
"Options:\n"
" -h, --help Display this help and exit\n"
"\n"
"Report bugs to <linux-bcachefs@vger.kernel.org>");
}
int cmd_subvolume_delete(int argc, char *argv[])
{
static const struct option longopts[] = {
{ "help", no_argument, NULL, 'h' },
{ NULL }
};
char *path;
int opt;
while ((opt = getopt_long(argc, argv, "h", longopts, NULL)) != -1)
switch (opt) {
case 'h':
subvolume_delete_usage();
exit(EXIT_SUCCESS);
}
args_shift(optind);
while ((path = arg_pop())) {
char *dir = dirname(strdup(path));
struct bchfs_handle fs = bcache_fs_open(dir);
struct bch_ioctl_subvolume i = {
.dirfd = AT_FDCWD,
.mode = 0777,
.dst_ptr = (unsigned long)path,
};
xioctl(fs.ioctl_fd, BCH_IOCTL_SUBVOLUME_DESTROY, &i);
bcache_fs_close(fs);
}
return 0;
}
static void snapshot_create_usage(void)
{
puts("bcachefs subvolume snapshot - create a snapshot \n"
"Usage: bcachefs subvolume snapshot [OPTION]... <source> <dest>\n"
"\n"
"Create a snapshot of <source> at <dest>. If specified, <source> must be a subvolume;\n"
"if not specified the snapshot will be of the subvolme containing <dest>.\n"
"Options:\n"
" -r Make snapshot read only\n"
" -h, --help Display this help and exit\n"
"\n"
"Report bugs to <linux-bcachefs@vger.kernel.org>");
}
int cmd_subvolume_snapshot(int argc, char *argv[])
{
static const struct option longopts[] = {
{ "help", no_argument, NULL, 'h' },
{ NULL }
};
unsigned flags = BCH_SUBVOL_SNAPSHOT_CREATE;
int opt;
while ((opt = getopt_long(argc, argv, "rh", longopts, NULL)) != -1)
switch (opt) {
case 'r':
flags |= BCH_SUBVOL_SNAPSHOT_RO;
break;
case 'h':
snapshot_create_usage();
exit(EXIT_SUCCESS);
}
args_shift(optind);
char *src = arg_pop();
char *dst = arg_pop();
if (argc)
die("Too many arguments");
if (!dst)
swap(src, dst);
if (!dst)
die("Please specify a path to create");
char *dir = dirname(strdup(dst));
struct bchfs_handle fs = bcache_fs_open(dir);
struct bch_ioctl_subvolume i = {
.flags = flags,
.dirfd = AT_FDCWD,
.mode = 0777,
.src_ptr = (unsigned long)src,
.dst_ptr = (unsigned long)dst,
};
xioctl(fs.ioctl_fd, BCH_IOCTL_SUBVOLUME_CREATE, &i);
bcache_fs_close(fs);
return 0;
}
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