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-rw-r--r--src/import/import.c491
1 files changed, 491 insertions, 0 deletions
diff --git a/src/import/import.c b/src/import/import.c
new file mode 100644
index 0000000..c762124
--- /dev/null
+++ b/src/import/import.c
@@ -0,0 +1,491 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <getopt.h>
+#include <locale.h>
+
+#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);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 11:55:21 +0000