static int init_root_path(struct btrfs_send *s, const char *subvol)
{
int ret = 0;
if (s->root_path)
goto out;
ret = find_mount_root(subvol, &s->root_path);
if (ret < 0) {
ret = -EINVAL;
fprintf(stderr, "ERROR: failed to determine mount point "
"for %s\n", subvol);
goto out;
}
s->mnt_fd = open(s->root_path, O_RDONLY | O_NOATIME);
if (s->mnt_fd < 0) {
ret = -errno;
fprintf(stderr, "ERROR: can't open '%s': %s\n", s->root_path,
strerror(-ret));
goto out;
}
ret = subvol_uuid_search_init(s->mnt_fd, &s->sus);
if (ret < 0) {
fprintf(stderr, "ERROR: failed to initialize subvol search. "
"%s\n", strerror(-ret));
goto out;
}
out:
return ret;
}
static int init_root_path(struct btrfs_send *sctx, const char *subvol)
{
int ret = 0;
if (sctx->root_path)
goto out;
ret = find_mount_root(subvol, &sctx->root_path);
if (ret < 0) {
error("failed to determine mount point for %s: %s",
subvol, strerror(-ret));
ret = -EINVAL;
goto out;
}
if (ret > 0) {
error("%s doesn't belong to btrfs mount point", subvol);
ret = -EINVAL;
goto out;
}
sctx->mnt_fd = open(sctx->root_path, O_RDONLY | O_NOATIME);
if (sctx->mnt_fd < 0) {
ret = -errno;
error("cannot open '%s': %s", sctx->root_path, strerror(-ret));
goto out;
}
ret = subvol_uuid_search_init(sctx->mnt_fd, &sctx->sus);
if (ret < 0) {
error("failed to initialize subvol search: %s",
strerror(-ret));
goto out;
}
out:
return ret;
}
static int do_receive(struct btrfs_receive *r, const char *tomnt,
char *realmnt, int r_fd, u64 max_errors)
{
u64 subvol_id;
int ret;
char *dest_dir_full_path;
char root_subvol_path[PATH_MAX];
int end = 0;
dest_dir_full_path = realpath(tomnt, NULL);
if (!dest_dir_full_path) {
ret = -errno;
error("realpath(%s) failed: %s", tomnt, strerror(-ret));
goto out;
}
r->dest_dir_fd = open(dest_dir_full_path, O_RDONLY | O_NOATIME);
if (r->dest_dir_fd < 0) {
ret = -errno;
error("cannot open destination directory %s: %s",
dest_dir_full_path, strerror(-ret));
goto out;
}
if (realmnt[0]) {
r->root_path = realmnt;
} else {
ret = find_mount_root(dest_dir_full_path, &r->root_path);
if (ret < 0) {
error("failed to determine mount point for %s: %s",
dest_dir_full_path, strerror(-ret));
ret = -EINVAL;
goto out;
}
if (ret > 0) {
error("%s doesn't belong to btrfs mount point",
dest_dir_full_path);
ret = -EINVAL;
goto out;
}
}
r->mnt_fd = open(r->root_path, O_RDONLY | O_NOATIME);
if (r->mnt_fd < 0) {
ret = -errno;
error("cannot open %s: %s", r->root_path, strerror(-ret));
goto out;
}
/*
* If we use -m or a default subvol we want to resolve the path to the
* subvolume we're sitting in so that we can adjust the paths of any
* subvols we want to receive in.
*/
ret = btrfs_list_get_path_rootid(r->mnt_fd, &subvol_id);
if (ret) {
error("cannot resolve our subvolid: %d",
ret);
goto out;
}
root_subvol_path[0] = 0;
ret = btrfs_subvolid_resolve(r->mnt_fd, root_subvol_path,
PATH_MAX, subvol_id);
if (ret) {
error("cannot resolve our subvol path");
goto out;
}
/*
* Ok we're inside of a subvol off of the root subvol, we need to
* actually set full_root_path.
*/
if (*root_subvol_path)
r->full_root_path = root_subvol_path;
if (r->dest_dir_chroot) {
if (chroot(dest_dir_full_path)) {
ret = -errno;
error("failed to chroot to %s: %s",
dest_dir_full_path, strerror(-ret));
goto out;
}
if (chdir("/")) {
ret = -errno;
error("failed to chdir to / after chroot: %s",
strerror(-ret));
goto out;
}
fprintf(stderr, "Chroot to %s\n", dest_dir_full_path);
r->root_path = strdup("/");
r->dest_dir_path = r->root_path;
} else {
/*
* find_mount_root returns a root_path that is a subpath of
* dest_dir_full_path. Now get the other part of root_path,
* which is the destination dir relative to root_path.
*/
r->dest_dir_path = dest_dir_full_path + strlen(r->root_path);
while (r->dest_dir_path[0] == '/')
r->dest_dir_path++;
}
ret = subvol_uuid_search_init(r->mnt_fd, &r->sus);
if (ret < 0)
goto out;
while (!end) {
if (r->cached_capabilities_len) {
if (g_verbose >= 3)
fprintf(stderr, "clear cached capabilities\n");
memset(r->cached_capabilities, 0,
sizeof(r->cached_capabilities));
r->cached_capabilities_len = 0;
}
ret = btrfs_read_and_process_send_stream(r_fd, &send_ops, r,
r->honor_end_cmd,
max_errors);
if (ret < 0)
goto out;
if (ret)
end = 1;
close_inode_for_write(r);
ret = finish_subvol(r);
if (ret < 0)
goto out;
}
ret = 0;
out:
if (r->write_fd != -1) {
close(r->write_fd);
r->write_fd = -1;
}
if (r->root_path != realmnt)
free(r->root_path);
r->root_path = NULL;
r->dest_dir_path = NULL;
free(dest_dir_full_path);
subvol_uuid_search_finit(&r->sus);
if (r->mnt_fd != -1) {
close(r->mnt_fd);
r->mnt_fd = -1;
}
if (r->dest_dir_fd != -1) {
close(r->dest_dir_fd);
r->dest_dir_fd = -1;
}
return ret;
}
static int cmd_subvol_show(int argc, char **argv)
{
struct root_info get_ri;
struct btrfs_list_filter_set *filter_set;
char tstr[256];
char uuidparse[BTRFS_UUID_UNPARSED_SIZE];
char *fullpath = NULL, *svpath = NULL, *mnt = NULL;
char raw_prefix[] = "\t\t\t\t";
u64 sv_id, mntid;
int fd = -1, mntfd = -1;
int ret = 1;
DIR *dirstream1 = NULL, *dirstream2 = NULL;
if (check_argc_exact(argc, 2))
usage(cmd_subvol_show_usage);
fullpath = realpath(argv[1], NULL);
if (!fullpath) {
fprintf(stderr, "ERROR: finding real path for '%s', %s\n",
argv[1], strerror(errno));
goto out;
}
ret = test_issubvolume(fullpath);
if (ret < 0) {
fprintf(stderr, "ERROR: error accessing '%s'\n", fullpath);
goto out;
}
if (!ret) {
fprintf(stderr, "ERROR: '%s' is not a subvolume\n", fullpath);
ret = 1;
goto out;
}
ret = find_mount_root(fullpath, &mnt);
if (ret < 0) {
fprintf(stderr, "ERROR: find_mount_root failed on '%s': "
"%s\n", fullpath, strerror(-ret));
goto out;
}
if (ret > 0) {
fprintf(stderr,
"ERROR: %s doesn't belong to btrfs mount point\n",
fullpath);
goto out;
}
ret = 1;
svpath = get_subvol_name(mnt, fullpath);
fd = open_file_or_dir(fullpath, &dirstream1);
if (fd < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", fullpath);
goto out;
}
ret = btrfs_list_get_path_rootid(fd, &sv_id);
if (ret) {
fprintf(stderr, "ERROR: can't get rootid for '%s'\n",
fullpath);
goto out;
}
mntfd = open_file_or_dir(mnt, &dirstream2);
if (mntfd < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", mnt);
goto out;
}
ret = btrfs_list_get_path_rootid(mntfd, &mntid);
if (ret) {
fprintf(stderr, "ERROR: can't get rootid for '%s'\n", mnt);
goto out;
}
if (sv_id == BTRFS_FS_TREE_OBJECTID) {
printf("%s is btrfs root\n", fullpath);
goto out;
}
memset(&get_ri, 0, sizeof(get_ri));
get_ri.root_id = sv_id;
ret = btrfs_get_subvol(mntfd, &get_ri);
if (ret) {
fprintf(stderr, "ERROR: can't find '%s'\n",
svpath);
goto out;
}
/* print the info */
printf("%s\n", fullpath);
printf("\tName: \t\t\t%s\n", get_ri.name);
if (uuid_is_null(get_ri.uuid))
strcpy(uuidparse, "-");
else
uuid_unparse(get_ri.uuid, uuidparse);
printf("\tUUID: \t\t\t%s\n", uuidparse);
if (uuid_is_null(get_ri.puuid))
strcpy(uuidparse, "-");
else
uuid_unparse(get_ri.puuid, uuidparse);
printf("\tParent UUID: \t\t%s\n", uuidparse);
if (uuid_is_null(get_ri.ruuid))
strcpy(uuidparse, "-");
else
uuid_unparse(get_ri.ruuid, uuidparse);
printf("\tReceived UUID: \t\t%s\n", uuidparse);
if (get_ri.otime) {
struct tm tm;
localtime_r(&get_ri.otime, &tm);
strftime(tstr, 256, "%Y-%m-%d %X %z", &tm);
} else
strcpy(tstr, "-");
printf("\tCreation time: \t\t%s\n", tstr);
printf("\tSubvolume ID: \t\t%llu\n", get_ri.root_id);
printf("\tGeneration: \t\t%llu\n", get_ri.gen);
printf("\tGen at creation: \t%llu\n", get_ri.ogen);
printf("\tParent ID: \t\t%llu\n", get_ri.ref_tree);
printf("\tTop level ID: \t\t%llu\n", get_ri.top_id);
if (get_ri.flags & BTRFS_ROOT_SUBVOL_RDONLY)
printf("\tFlags: \t\t\treadonly\n");
else
printf("\tFlags: \t\t\t-\n");
/* print the snapshots of the given subvol if any*/
printf("\tSnapshot(s):\n");
filter_set = btrfs_list_alloc_filter_set();
btrfs_list_setup_filter(&filter_set, BTRFS_LIST_FILTER_BY_PARENT,
(u64)(unsigned long)get_ri.uuid);
btrfs_list_setup_print_column(BTRFS_LIST_PATH);
btrfs_list_subvols_print(fd, filter_set, NULL, BTRFS_LIST_LAYOUT_RAW,
1, raw_prefix);
/* clean up */
free(get_ri.path);
free(get_ri.name);
free(get_ri.full_path);
btrfs_list_free_filter_set(filter_set);
out:
close_file_or_dir(fd, dirstream1);
close_file_or_dir(mntfd, dirstream2);
free(mnt);
free(fullpath);
return !!ret;
}
static int do_receive(struct btrfs_receive *r, const char *tomnt, int r_fd,
u64 max_errors)
{
int ret;
char *dest_dir_full_path;
int end = 0;
dest_dir_full_path = realpath(tomnt, NULL);
if (!dest_dir_full_path) {
ret = -errno;
fprintf(stderr, "ERROR: realpath(%s) failed. %s\n", tomnt,
strerror(-ret));
goto out;
}
r->dest_dir_fd = open(dest_dir_full_path, O_RDONLY | O_NOATIME);
if (r->dest_dir_fd < 0) {
ret = -errno;
fprintf(stderr,
"ERROR: failed to open destination directory %s. %s\n",
dest_dir_full_path, strerror(-ret));
goto out;
}
ret = find_mount_root(dest_dir_full_path, &r->root_path);
if (ret < 0) {
fprintf(stderr,
"ERROR: failed to determine mount point for %s: %s\n",
dest_dir_full_path, strerror(-ret));
ret = -EINVAL;
goto out;
}
if (ret > 0) {
fprintf(stderr,
"ERROR: %s doesn't belong to btrfs mount point\n",
dest_dir_full_path);
ret = -EINVAL;
goto out;
}
r->mnt_fd = open(r->root_path, O_RDONLY | O_NOATIME);
if (r->mnt_fd < 0) {
ret = -errno;
fprintf(stderr, "ERROR: failed to open %s. %s\n", r->root_path,
strerror(-ret));
goto out;
}
/*
* find_mount_root returns a root_path that is a subpath of
* dest_dir_full_path. Now get the other part of root_path,
* which is the destination dir relative to root_path.
*/
r->dest_dir_path = dest_dir_full_path + strlen(r->root_path);
while (r->dest_dir_path[0] == '/')
r->dest_dir_path++;
ret = subvol_uuid_search_init(r->mnt_fd, &r->sus);
if (ret < 0)
goto out;
while (!end) {
ret = btrfs_read_and_process_send_stream(r_fd, &send_ops, r,
r->honor_end_cmd,
max_errors);
if (ret < 0)
goto out;
if (ret)
end = 1;
close_inode_for_write(r);
ret = finish_subvol(r);
if (ret < 0)
goto out;
}
ret = 0;
out:
if (r->write_fd != -1) {
close(r->write_fd);
r->write_fd = -1;
}
free(r->root_path);
r->root_path = NULL;
free(r->write_path);
r->write_path = NULL;
free(r->full_subvol_path);
r->full_subvol_path = NULL;
r->dest_dir_path = NULL;
free(dest_dir_full_path);
if (r->cur_subvol) {
free(r->cur_subvol->path);
free(r->cur_subvol);
r->cur_subvol = NULL;
}
subvol_uuid_search_finit(&r->sus);
if (r->mnt_fd != -1) {
close(r->mnt_fd);
r->mnt_fd = -1;
}
if (r->dest_dir_fd != -1) {
close(r->dest_dir_fd);
r->dest_dir_fd = -1;
}
return ret;
}
int cmd_send(int argc, char **argv)
{
char *subvol = NULL;
int ret;
char outname[PATH_MAX];
struct btrfs_send send;
u32 i;
char *mount_root = NULL;
char *snapshot_parent = NULL;
u64 root_id = 0;
u64 parent_root_id = 0;
int full_send = 1;
int new_end_cmd_semantic = 0;
u64 send_flags = 0;
memset(&send, 0, sizeof(send));
send.dump_fd = fileno(stdout);
outname[0] = 0;
while (1) {
enum { GETOPT_VAL_SEND_NO_DATA = 256 };
static const struct option long_options[] = {
{ "verbose", no_argument, NULL, 'v' },
{ "quiet", no_argument, NULL, 'q' },
{ "no-data", no_argument, NULL, GETOPT_VAL_SEND_NO_DATA }
};
int c = getopt_long(argc, argv, "vqec:f:i:p:", long_options, NULL);
if (c < 0)
break;
switch (c) {
case 'v':
g_verbose++;
break;
case 'q':
g_verbose = 0;
break;
case 'e':
new_end_cmd_semantic = 1;
break;
case 'c':
subvol = realpath(optarg, NULL);
if (!subvol) {
ret = -errno;
error("realpath %s failed: %s\n", optarg, strerror(-ret));
goto out;
}
ret = set_root_info(&send, subvol, &root_id);
if (ret < 0)
goto out;
ret = is_subvol_ro(&send, subvol);
if (ret < 0)
goto out;
if (!ret) {
ret = -EINVAL;
error("cloned subvolume %s is not read-only", subvol);
goto out;
}
ret = add_clone_source(&send, root_id);
if (ret < 0) {
error("cannot add clone source: %s", strerror(-ret));
goto out;
}
free(subvol);
subvol = NULL;
free_send_info(&send);
full_send = 0;
break;
case 'f':
if (arg_copy_path(outname, optarg, sizeof(outname))) {
error("output file path too long (%zu)", strlen(optarg));
ret = 1;
goto out;
}
break;
case 'p':
if (snapshot_parent) {
error("you cannot have more than one parent (-p)");
ret = 1;
goto out;
}
snapshot_parent = realpath(optarg, NULL);
if (!snapshot_parent) {
ret = -errno;
error("realpath %s failed: %s", optarg, strerror(-ret));
goto out;
}
ret = is_subvol_ro(&send, snapshot_parent);
if (ret < 0)
goto out;
if (!ret) {
ret = -EINVAL;
error("parent subvolume %s is not read-only",
snapshot_parent);
goto out;
}
full_send = 0;
break;
case 'i':
error("option -i was removed, use -c instead");
ret = 1;
goto out;
case GETOPT_VAL_SEND_NO_DATA:
send_flags |= BTRFS_SEND_FLAG_NO_FILE_DATA;
break;
case '?':
default:
error("send arguments invalid");
ret = 1;
goto out;
}
}
if (check_argc_min(argc - optind, 1))
usage(cmd_send_usage);
if (outname[0]) {
int tmpfd;
/*
* Try to use an existing file first. Even if send runs as
* root, it might not have permissions to create file (eg. on a
* NFS) but it should still be able to use a pre-created file.
*/
tmpfd = open(outname, O_WRONLY | O_TRUNC);
if (tmpfd < 0) {
if (errno == ENOENT)
tmpfd = open(outname,
O_CREAT | O_WRONLY | O_TRUNC, 0600);
}
send.dump_fd = tmpfd;
if (send.dump_fd == -1) {
ret = -errno;
error("cannot create '%s': %s", outname, strerror(-ret));
goto out;
}
}
if (isatty(send.dump_fd)) {
error(
"not dumping send stream into a terminal, redirect it into a file");
ret = 1;
goto out;
}
/* use first send subvol to determine mount_root */
subvol = realpath(argv[optind], NULL);
if (!subvol) {
ret = -errno;
error("unable to resolve %s", argv[optind]);
goto out;
}
ret = init_root_path(&send, subvol);
if (ret < 0)
goto out;
if (snapshot_parent != NULL) {
ret = get_root_id(&send,
subvol_strip_mountpoint(send.root_path, snapshot_parent),
&parent_root_id);
if (ret < 0) {
error("could not resolve rootid for %s", snapshot_parent);
goto out;
}
ret = add_clone_source(&send, parent_root_id);
if (ret < 0) {
error("cannot add clone source: %s", strerror(-ret));
goto out;
}
}
for (i = optind; i < argc; i++) {
free(subvol);
subvol = realpath(argv[i], NULL);
if (!subvol) {
ret = -errno;
error("unable to resolve %s", argv[i]);
goto out;
}
ret = find_mount_root(subvol, &mount_root);
if (ret < 0) {
error("find_mount_root failed on %s: %s", subvol,
strerror(-ret));
goto out;
}
if (ret > 0) {
error("%s does not belong to btrfs mount point",
subvol);
ret = -EINVAL;
goto out;
}
if (strcmp(send.root_path, mount_root) != 0) {
ret = -EINVAL;
error("all subvolumes must be from the same filesystem");
goto out;
}
free(mount_root);
ret = is_subvol_ro(&send, subvol);
if (ret < 0)
goto out;
if (!ret) {
ret = -EINVAL;
error("subvolume %s is not read-only", subvol);
goto out;
}
}
if ((send_flags & BTRFS_SEND_FLAG_NO_FILE_DATA) && g_verbose > 1)
if (g_verbose > 1)
fprintf(stderr, "Mode NO_FILE_DATA enabled\n");
for (i = optind; i < argc; i++) {
int is_first_subvol;
int is_last_subvol;
free(subvol);
subvol = argv[i];
if (g_verbose > 0)
fprintf(stderr, "At subvol %s\n", subvol);
subvol = realpath(subvol, NULL);
if (!subvol) {
ret = -errno;
error("realpath %s failed: %s", argv[i], strerror(-ret));
goto out;
}
if (!full_send && !snapshot_parent) {
ret = set_root_info(&send, subvol, &root_id);
if (ret < 0)
goto out;
ret = find_good_parent(&send, root_id, &parent_root_id);
if (ret < 0) {
error("parent determination failed for %lld",
root_id);
goto out;
}
}
if (new_end_cmd_semantic) {
/* require new kernel */
is_first_subvol = (i == optind);
is_last_subvol = (i == argc - 1);
} else {
/* be compatible to old and new kernel */
is_first_subvol = 1;
is_last_subvol = 1;
}
ret = do_send(&send, parent_root_id, is_first_subvol,
is_last_subvol, subvol, send_flags);
if (ret < 0)
goto out;
if (!full_send && !snapshot_parent) {
/* done with this subvol, so add it to the clone sources */
ret = add_clone_source(&send, root_id);
if (ret < 0) {
error("cannot add clone source: %s", strerror(-ret));
goto out;
}
free_send_info(&send);
}
}
ret = 0;
out:
free(subvol);
free(snapshot_parent);
free(send.clone_sources);
free_send_info(&send);
return !!ret;
}
int cmd_send_start(int argc, char **argv)
{
char *subvol = NULL;
int c;
int ret;
char *outname = NULL;
struct btrfs_send send;
u32 i;
char *mount_root = NULL;
char *snapshot_parent = NULL;
u64 root_id;
u64 parent_root_id = 0;
int full_send = 1;
memset(&send, 0, sizeof(send));
send.dump_fd = fileno(stdout);
while ((c = getopt(argc, argv, "vc:f:i:p:")) != -1) {
switch (c) {
case 'v':
g_verbose++;
break;
case 'c':
subvol = realpath(optarg, NULL);
if (!subvol) {
ret = -errno;
fprintf(stderr, "ERROR: realpath %s failed. "
"%s\n", optarg, strerror(-ret));
goto out;
}
ret = init_root_path(&send, subvol);
if (ret < 0)
goto out;
ret = get_root_id(&send, get_subvol_name(send.root_path, subvol),
&root_id);
if (ret < 0) {
fprintf(stderr, "ERROR: could not resolve "
"root_id for %s\n", subvol);
goto out;
}
add_clone_source(&send, root_id);
subvol_uuid_search_finit(&send.sus);
free(subvol);
subvol = NULL;
if (send.mnt_fd >= 0) {
close(send.mnt_fd);
send.mnt_fd = -1;
}
free(send.root_path);
send.root_path = NULL;
full_send = 0;
break;
case 'f':
outname = optarg;
break;
case 'p':
if (snapshot_parent) {
fprintf(stderr, "ERROR: you cannot have more than one parent (-p)\n");
ret = 1;
goto out;
}
snapshot_parent = realpath(optarg, NULL);
if (!snapshot_parent) {
ret = -errno;
fprintf(stderr, "ERROR: realpath %s failed. "
"%s\n", optarg, strerror(-ret));
goto out;
}
full_send = 0;
break;
case 'i':
fprintf(stderr,
"ERROR: -i was removed, use -c instead\n");
ret = 1;
goto out;
case '?':
default:
fprintf(stderr, "ERROR: send args invalid.\n");
ret = 1;
goto out;
}
}
if (optind == argc) {
fprintf(stderr, "ERROR: send needs path to snapshot\n");
ret = 1;
goto out;
}
if (outname != NULL) {
send.dump_fd = creat(outname, 0600);
if (send.dump_fd == -1) {
ret = -errno;
fprintf(stderr, "ERROR: can't create '%s': %s\n",
outname, strerror(-ret));
goto out;
}
}
if (isatty(send.dump_fd)) {
fprintf(stderr,
"ERROR: not dumping send stream into a terminal, "
"redirect it into a file\n");
ret = 1;
goto out;
}
/* use first send subvol to determine mount_root */
subvol = argv[optind];
subvol = realpath(argv[optind], NULL);
if (!subvol) {
ret = -errno;
fprintf(stderr, "ERROR: unable to resolve %s\n", argv[optind]);
goto out;
}
ret = init_root_path(&send, subvol);
if (ret < 0)
goto out;
if (snapshot_parent != NULL) {
ret = get_root_id(&send,
get_subvol_name(send.root_path, snapshot_parent),
&parent_root_id);
if (ret < 0) {
fprintf(stderr, "ERROR: could not resolve root_id "
"for %s\n", snapshot_parent);
goto out;
}
add_clone_source(&send, parent_root_id);
}
for (i = optind; i < argc; i++) {
free(subvol);
subvol = realpath(argv[i], NULL);
if (!subvol) {
ret = -errno;
fprintf(stderr, "ERROR: unable to resolve %s\n", argv[i]);
goto out;
}
ret = find_mount_root(subvol, &mount_root);
if (ret < 0) {
fprintf(stderr, "ERROR: find_mount_root failed on %s: "
"%s\n", subvol,
strerror(-ret));
goto out;
}
if (strcmp(send.root_path, mount_root) != 0) {
ret = -EINVAL;
fprintf(stderr, "ERROR: all subvols must be from the "
"same fs.\n");
goto out;
}
free(mount_root);
ret = is_subvol_ro(&send, subvol);
if (ret < 0)
goto out;
if (!ret) {
ret = -EINVAL;
fprintf(stderr, "ERROR: %s is not read-only.\n",
subvol);
goto out;
}
}
for (i = optind; i < argc; i++) {
free(subvol);
subvol = argv[i];
fprintf(stderr, "At subvol %s\n", subvol);
subvol = realpath(subvol, NULL);
if (!subvol) {
ret = -errno;
fprintf(stderr, "ERROR: realpath %s failed. "
"%s\n", argv[i], strerror(-ret));
goto out;
}
ret = get_root_id(&send, get_subvol_name(send.root_path, subvol),
&root_id);
if (ret < 0) {
fprintf(stderr, "ERROR: could not resolve root_id "
"for %s\n", subvol);
goto out;
}
if (!full_send && !parent_root_id) {
ret = find_good_parent(&send, root_id, &parent_root_id);
if (ret < 0) {
fprintf(stderr, "ERROR: parent determination failed for %lld\n",
root_id);
goto out;
}
}
ret = is_subvol_ro(&send, subvol);
if (ret < 0)
goto out;
if (!ret) {
ret = -EINVAL;
fprintf(stderr, "ERROR: %s is not read-only.\n",
subvol);
goto out;
}
ret = do_send(&send, root_id, parent_root_id);
if (ret < 0)
goto out;
/* done with this subvol, so add it to the clone sources */
add_clone_source(&send, root_id);
parent_root_id = 0;
full_send = 0;
}
ret = 0;
out:
free(subvol);
free(snapshot_parent);
free(send.clone_sources);
if (send.mnt_fd >= 0)
close(send.mnt_fd);
free(send.root_path);
subvol_uuid_search_finit(&send.sus);
return ret;
}
