static int cmd_add_dev(int argc, char **argv)
{
char *mntpnt;
int i, fdmnt, ret=0, e;
DIR *dirstream = NULL;
int discard = 1;
int force = 0;
while (1) {
int c;
static const struct option long_options[] = {
{ "nodiscard", optional_argument, NULL, 'K'},
{ "force", no_argument, NULL, 'f'},
{ NULL, 0, NULL, 0}
};
c = getopt_long(argc, argv, "Kf", long_options, NULL);
if (c < 0)
break;
switch (c) {
case 'K':
discard = 0;
break;
case 'f':
force = 1;
break;
default:
usage(cmd_add_dev_usage);
}
}
argc = argc - optind;
if (check_argc_min(argc, 2))
usage(cmd_add_dev_usage);
mntpnt = argv[optind + argc - 1];
fdmnt = open_file_or_dir(mntpnt, &dirstream);
if (fdmnt < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", mntpnt);
return 1;
}
for (i = optind; i < optind + argc - 1; i++){
struct btrfs_ioctl_vol_args ioctl_args;
int devfd, res;
u64 dev_block_count = 0;
int mixed = 0;
char *path;
res = test_dev_for_mkfs(argv[i], force);
if (res) {
ret++;
continue;
}
devfd = open(argv[i], O_RDWR);
if (devfd < 0) {
fprintf(stderr, "ERROR: Unable to open device '%s'\n", argv[i]);
ret++;
continue;
}
res = btrfs_prepare_device(devfd, argv[i], 1, &dev_block_count,
0, &mixed, discard);
close(devfd);
if (res) {
ret++;
goto error_out;
}
path = canonicalize_path(argv[i]);
if (!path) {
fprintf(stderr,
"ERROR: Could not canonicalize pathname '%s': %s\n",
argv[i], strerror(errno));
ret++;
goto error_out;
}
memset(&ioctl_args, 0, sizeof(ioctl_args));
strncpy_null(ioctl_args.name, path);
res = ioctl(fdmnt, BTRFS_IOC_ADD_DEV, &ioctl_args);
e = errno;
if (res < 0) {
fprintf(stderr, "ERROR: error adding the device '%s' - %s\n",
path, strerror(e));
ret++;
}
free(path);
}
error_out:
close_file_or_dir(fdmnt, dirstream);
return !!ret;
}
static int process_snapshot(const char *path, const u8 *uuid, u64 ctransid,
const u8 *parent_uuid, u64 parent_ctransid,
void *user)
{
int ret;
struct btrfs_receive *r = user;
char uuid_str[BTRFS_UUID_UNPARSED_SIZE];
struct btrfs_ioctl_vol_args_v2 args_v2;
struct subvol_info *parent_subvol = NULL;
ret = finish_subvol(r);
if (ret < 0)
goto out;
r->cur_subvol = calloc(1, sizeof(*r->cur_subvol));
if (strlen(r->dest_dir_path) == 0)
r->cur_subvol->path = strdup(path);
else
r->cur_subvol->path = path_cat(r->dest_dir_path, path);
free(r->full_subvol_path);
r->full_subvol_path = path_cat3(r->root_path, r->dest_dir_path, path);
fprintf(stdout, "At snapshot %s\n", path);
memcpy(r->cur_subvol->received_uuid, uuid, BTRFS_UUID_SIZE);
r->cur_subvol->stransid = ctransid;
if (g_verbose) {
uuid_unparse((u8*)r->cur_subvol->received_uuid, uuid_str);
fprintf(stderr, "receiving snapshot %s uuid=%s, "
"ctransid=%llu ", path, uuid_str,
r->cur_subvol->stransid);
uuid_unparse(parent_uuid, uuid_str);
fprintf(stderr, "parent_uuid=%s, parent_ctransid=%llu\n",
uuid_str, parent_ctransid);
}
memset(&args_v2, 0, sizeof(args_v2));
strncpy_null(args_v2.name, path);
parent_subvol = subvol_uuid_search(&r->sus, 0, parent_uuid,
parent_ctransid, NULL, subvol_search_by_received_uuid);
if (!parent_subvol) {
parent_subvol = subvol_uuid_search(&r->sus, 0, parent_uuid,
parent_ctransid, NULL, subvol_search_by_uuid);
}
if (!parent_subvol) {
ret = -ENOENT;
fprintf(stderr, "ERROR: could not find parent subvolume\n");
goto out;
}
/*if (rs_args.ctransid > rs_args.rtransid) {
if (!r->force) {
ret = -EINVAL;
fprintf(stderr, "ERROR: subvolume %s was modified after it was received.\n", r->subvol_parent_name);
goto out;
} else {
fprintf(stderr, "WARNING: subvolume %s was modified after it was received.\n", r->subvol_parent_name);
}
}*/
args_v2.fd = openat(r->mnt_fd, parent_subvol->path,
O_RDONLY | O_NOATIME);
if (args_v2.fd < 0) {
ret = -errno;
if (errno != ENOENT)
fprintf(stderr, "ERROR: open %s failed. %s\n",
parent_subvol->path, strerror(-ret));
else
fprintf(stderr,
"It seems that you have changed your default "
"subvolume or you specify other subvolume to\n"
"mount btrfs, try to remount this btrfs filesystem "
"with fs tree, and run btrfs receive again!\n");
goto out;
}
ret = ioctl(r->dest_dir_fd, BTRFS_IOC_SNAP_CREATE_V2, &args_v2);
close(args_v2.fd);
if (ret < 0) {
ret = -errno;
fprintf(stderr, "ERROR: creating snapshot %s -> %s "
"failed. %s\n", parent_subvol->path,
path, strerror(-ret));
goto out;
}
out:
if (parent_subvol) {
free(parent_subvol->path);
free(parent_subvol);
}
return ret;
}
