/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include #include #include "sd-event.h" #include "sd-id128.h" #include "alloc-util.h" #include "discover-image.h" #include "env-util.h" #include "fd-util.h" #include "fs-util.h" #include "hostname-util.h" #include "import-raw.h" #include "import-tar.h" #include "import-util.h" #include "io-util.h" #include "main-func.h" #include "parse-argument.h" #include "parse-util.h" #include "signal-util.h" #include "string-util.h" #include "terminal-util.h" #include "verbs.h" static const char *arg_image_root = "/var/lib/machines"; static ImportFlags arg_import_flags = IMPORT_BTRFS_SUBVOL | IMPORT_BTRFS_QUOTA | IMPORT_CONVERT_QCOW2 | IMPORT_SYNC; static uint64_t arg_offset = UINT64_MAX, arg_size_max = UINT64_MAX; static int normalize_local(const char *local, char **ret) { _cleanup_free_ char *ll = NULL; int r; assert(ret); if (arg_import_flags & IMPORT_DIRECT) { if (!local) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "No local path specified."); if (!path_is_absolute(local)) { ll = path_join(arg_image_root, local); if (!ll) return log_oom(); local = ll; } if (!path_is_valid(local)) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Local path name '%s' is not valid.", local); } else { if (local) { if (!hostname_is_valid(local, 0)) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Local image name '%s' is not valid.", local); } else local = "imported"; if (!FLAGS_SET(arg_import_flags, IMPORT_FORCE)) { r = image_find(IMAGE_MACHINE, local, NULL, NULL); if (r < 0) { if (r != -ENOENT) return log_error_errno(r, "Failed to check whether image '%s' exists: %m", local); } else return log_error_errno(SYNTHETIC_ERRNO(EEXIST), "Image '%s' already exists.", local); } } if (!ll) { ll = strdup(local); if (!ll) return log_oom(); } *ret = TAKE_PTR(ll); return 0; } static int open_source(const char *path, const char *local, int *ret_open_fd) { _cleanup_close_ int open_fd = -1; int retval; assert(local); assert(ret_open_fd); if (path) { open_fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY); if (open_fd < 0) return log_error_errno(errno, "Failed to open source file '%s': %m", path); retval = open_fd; if (arg_offset != UINT64_MAX) log_info("Importing '%s', saving at offset %" PRIu64 " in '%s'.", path, arg_offset, local); else log_info("Importing '%s', saving as '%s'.", path, local); } else { _cleanup_free_ char *pretty = NULL; retval = STDIN_FILENO; (void) fd_get_path(STDIN_FILENO, &pretty); if (arg_offset != UINT64_MAX) log_info("Importing '%s', saving at offset %" PRIu64 " in '%s'.", strempty(pretty), arg_offset, local); else log_info("Importing '%s', saving as '%s'.", strempty(pretty), local); } *ret_open_fd = TAKE_FD(open_fd); return retval; } static void on_tar_finished(TarImport *import, int error, void *userdata) { sd_event *event = userdata; assert(import); if (error == 0) log_info("Operation completed successfully."); sd_event_exit(event, abs(error)); } static int import_tar(int argc, char *argv[], void *userdata) { _cleanup_(tar_import_unrefp) TarImport *import = NULL; _cleanup_free_ char *ll = NULL, *normalized = NULL; _cleanup_(sd_event_unrefp) sd_event *event = NULL; const char *path = NULL, *local = NULL; _cleanup_close_ int open_fd = -1; int r, fd; if (argc >= 2) path = empty_or_dash_to_null(argv[1]); if (argc >= 3) local = empty_or_dash_to_null(argv[2]); else if (path) { _cleanup_free_ char *l = NULL; r = path_extract_filename(path, &l); if (r < 0) return log_error_errno(r, "Failed to extract filename from path '%s': %m", path); r = tar_strip_suffixes(l, &ll); if (r < 0) return log_oom(); local = ll; } r = normalize_local(local, &normalized); if (r < 0) return r; fd = open_source(path, normalized, &open_fd); if (fd < 0) return r; r = import_allocate_event_with_signals(&event); if (r < 0) return r; if (!FLAGS_SET(arg_import_flags, IMPORT_SYNC)) log_info("File system synchronization on completion is off."); r = tar_import_new(&import, event, arg_image_root, on_tar_finished, event); if (r < 0) return log_error_errno(r, "Failed to allocate importer: %m"); r = tar_import_start( import, fd, normalized, arg_import_flags & IMPORT_FLAGS_MASK_TAR); if (r < 0) return log_error_errno(r, "Failed to import image: %m"); r = sd_event_loop(event); if (r < 0) return log_error_errno(r, "Failed to run event loop: %m"); log_info("Exiting."); return -r; } static void on_raw_finished(RawImport *import, int error, void *userdata) { sd_event *event = userdata; assert(import); if (error == 0) log_info("Operation completed successfully."); sd_event_exit(event, abs(error)); } static int import_raw(int argc, char *argv[], void *userdata) { _cleanup_(raw_import_unrefp) RawImport *import = NULL; _cleanup_free_ char *ll = NULL, *normalized = NULL; _cleanup_(sd_event_unrefp) sd_event *event = NULL; const char *path = NULL, *local = NULL; _cleanup_close_ int open_fd = -1; int r, fd; if (argc >= 2) path = empty_or_dash_to_null(argv[1]); if (argc >= 3) local = empty_or_dash_to_null(argv[2]); else if (path) { _cleanup_free_ char *l = NULL; r = path_extract_filename(path, &l); if (r < 0) return log_error_errno(r, "Failed to extract filename from path '%s': %m", path); r = raw_strip_suffixes(l, &ll); if (r < 0) return log_oom(); local = ll; } r = normalize_local(local, &normalized); if (r < 0) return r; fd = open_source(path, normalized, &open_fd); if (fd < 0) return fd; r = import_allocate_event_with_signals(&event); if (r < 0) return r; if (!FLAGS_SET(arg_import_flags, IMPORT_SYNC)) log_info("File system synchronization on completion is off."); r = raw_import_new(&import, event, arg_image_root, on_raw_finished, event); if (r < 0) return log_error_errno(r, "Failed to allocate importer: %m"); r = raw_import_start( import, fd, normalized, arg_offset, arg_size_max, arg_import_flags & IMPORT_FLAGS_MASK_RAW); if (r < 0) return log_error_errno(r, "Failed to import image: %m"); r = sd_event_loop(event); if (r < 0) return log_error_errno(r, "Failed to run event loop: %m"); log_info("Exiting."); return -r; } static int help(int argc, char *argv[], void *userdata) { printf("%1$s [OPTIONS...] {COMMAND} ...\n" "\n%4$sImport container or virtual machine images.%5$s\n" "\n%2$sCommands:%3$s\n" " tar FILE [NAME] Import a TAR image\n" " raw FILE [NAME] Import a RAW image\n" "\n%2$sOptions:%3$s\n" " -h --help Show this help\n" " --version Show package version\n" " --force Force creation of image\n" " --image-root=PATH Image root directory\n" " --read-only Create a read-only image\n" " --direct Import directly to specified file\n" " --btrfs-subvol=BOOL Controls whether to create a btrfs subvolume\n" " instead of a directory\n" " --btrfs-quota=BOOL Controls whether to set up quota for btrfs\n" " subvolume\n" " --convert-qcow2=BOOL Controls whether to convert QCOW2 images to\n" " regular disk images\n" " --sync=BOOL Controls whether to sync() before completing\n" " --offset=BYTES Offset to seek to in destination\n" " --size-max=BYTES Maximum number of bytes to write to destination\n", program_invocation_short_name, ansi_underline(), ansi_normal(), ansi_highlight(), ansi_normal()); return 0; } static int parse_argv(int argc, char *argv[]) { enum { ARG_VERSION = 0x100, ARG_FORCE, ARG_IMAGE_ROOT, ARG_READ_ONLY, ARG_DIRECT, ARG_BTRFS_SUBVOL, ARG_BTRFS_QUOTA, ARG_CONVERT_QCOW2, ARG_SYNC, ARG_OFFSET, ARG_SIZE_MAX, }; static const struct option options[] = { { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, ARG_VERSION }, { "force", no_argument, NULL, ARG_FORCE }, { "image-root", required_argument, NULL, ARG_IMAGE_ROOT }, { "read-only", no_argument, NULL, ARG_READ_ONLY }, { "direct", no_argument, NULL, ARG_DIRECT }, { "btrfs-subvol", required_argument, NULL, ARG_BTRFS_SUBVOL }, { "btrfs-quota", required_argument, NULL, ARG_BTRFS_QUOTA }, { "convert-qcow2", required_argument, NULL, ARG_CONVERT_QCOW2 }, { "sync", required_argument, NULL, ARG_SYNC }, { "offset", required_argument, NULL, ARG_OFFSET }, { "size-max", required_argument, NULL, ARG_SIZE_MAX }, {} }; int r, c; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) switch (c) { case 'h': return help(0, NULL, NULL); case ARG_VERSION: return version(); case ARG_FORCE: arg_import_flags |= IMPORT_FORCE; break; case ARG_IMAGE_ROOT: arg_image_root = optarg; break; case ARG_READ_ONLY: arg_import_flags |= IMPORT_READ_ONLY; break; case ARG_DIRECT: arg_import_flags |= IMPORT_DIRECT; break; case ARG_BTRFS_SUBVOL: r = parse_boolean_argument("--btrfs-subvol=", optarg, NULL); if (r < 0) return r; SET_FLAG(arg_import_flags, IMPORT_BTRFS_SUBVOL, r); break; case ARG_BTRFS_QUOTA: r = parse_boolean_argument("--btrfs-quota=", optarg, NULL); if (r < 0) return r; SET_FLAG(arg_import_flags, IMPORT_BTRFS_QUOTA, r); break; case ARG_CONVERT_QCOW2: r = parse_boolean_argument("--convert-qcow2=", optarg, NULL); if (r < 0) return r; SET_FLAG(arg_import_flags, IMPORT_CONVERT_QCOW2, r); break; case ARG_SYNC: r = parse_boolean_argument("--sync=", optarg, NULL); if (r < 0) return r; SET_FLAG(arg_import_flags, IMPORT_SYNC, r); break; case ARG_OFFSET: { uint64_t u; r = safe_atou64(optarg, &u); if (r < 0) return log_error_errno(r, "Failed to parse --offset= argument: %s", optarg); if (!FILE_SIZE_VALID(u)) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Argument to --offset= switch too large: %s", optarg); arg_offset = u; break; } case ARG_SIZE_MAX: { uint64_t u; r = parse_size(optarg, 1024, &u); if (r < 0) return log_error_errno(r, "Failed to parse --size-max= argument: %s", optarg); if (!FILE_SIZE_VALID(u)) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Argument to --size-max= switch too large: %s", optarg); arg_size_max = u; break; } case '?': return -EINVAL; default: assert_not_reached(); } /* Make sure offset+size is still in the valid range if both set */ if (arg_offset != UINT64_MAX && arg_size_max != UINT64_MAX && ((arg_size_max > (UINT64_MAX - arg_offset)) || !FILE_SIZE_VALID(arg_offset + arg_size_max))) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "File offset und maximum size out of range."); if (arg_offset != UINT64_MAX && !FLAGS_SET(arg_import_flags, IMPORT_DIRECT)) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "File offset only supported in --direct mode."); return 1; } static int import_main(int argc, char *argv[]) { static const Verb verbs[] = { { "help", VERB_ANY, VERB_ANY, 0, help }, { "tar", 2, 3, 0, import_tar }, { "raw", 2, 3, 0, import_raw }, {} }; return dispatch_verb(argc, argv, verbs, NULL); } static void parse_env(void) { int r; /* Let's make these relatively low-level settings also controllable via env vars. User can then set * them to systemd-import if they like to tweak behaviour */ r = getenv_bool("SYSTEMD_IMPORT_BTRFS_SUBVOL"); if (r >= 0) SET_FLAG(arg_import_flags, IMPORT_BTRFS_SUBVOL, r); else if (r != -ENXIO) log_warning_errno(r, "Failed to parse $SYSTEMD_IMPORT_BTRFS_SUBVOL: %m"); r = getenv_bool("SYSTEMD_IMPORT_BTRFS_QUOTA"); if (r >= 0) SET_FLAG(arg_import_flags, IMPORT_BTRFS_QUOTA, r); else if (r != -ENXIO) log_warning_errno(r, "Failed to parse $SYSTEMD_IMPORT_BTRFS_QUOTA: %m"); r = getenv_bool("SYSTEMD_IMPORT_SYNC"); if (r >= 0) SET_FLAG(arg_import_flags, IMPORT_SYNC, r); else if (r != -ENXIO) log_warning_errno(r, "Failed to parse $SYSTEMD_IMPORT_SYNC: %m"); } static int run(int argc, char *argv[]) { int r; setlocale(LC_ALL, ""); log_parse_environment(); log_open(); parse_env(); r = parse_argv(argc, argv); if (r <= 0) return r; (void) ignore_signals(SIGPIPE); return import_main(argc, argv); } DEFINE_MAIN_FUNCTION(run);