importd: add new bus calls for importing local tar and raw images

This also adds "machinectl import-raw" and "machinectl import-tar" to
wrap these new bus calls.

THe commands basically do for local files that "machinectl pull-raw" and
friends do for remote files.

1 files changed, 336 insertions, 0 deletions

diff --git a/src/import/import.c b/src/import/import.c
new file mode 100644
index 0000000000..762c425e6f
--- /dev/null
+++ b/src/import/import.c
@@ -0,0 +1,336 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2015 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <getopt.h>
+
+#include "sd-event.h"
+#include "event-util.h"
+#include "verbs.h"
+#include "build.h"
+#include "machine-image.h"
+#include "import-util.h"
+#include "import-tar.h"
+#include "import-raw.h"
+
+static bool arg_force = false;
+static bool arg_read_only = false;
+static const char *arg_image_root = "/var/lib/machines";
+
+static int interrupt_signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
+        log_notice("Transfer aborted.");
+        sd_event_exit(sd_event_source_get_event(s), EINTR);
+        return 0;
+}
+
+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_event_unref_ sd_event *event = NULL;
+        const char *path = NULL, *local = NULL;
+        _cleanup_free_ char *ll = NULL;
+        _cleanup_close_ int open_fd = -1;
+        int r, fd;
+
+        if (argc >= 2)
+                path = argv[1];
+        if (isempty(path) || streq(path, "-"))
+                path = NULL;
+
+        if (argc >= 3)
+                local = argv[2];
+        else if (path)
+                local = basename(path);
+        if (isempty(local) || streq(local, "-"))
+                local = NULL;
+
+        if (local) {
+                r = tar_strip_suffixes(local, &ll);
+                if (r < 0)
+                        return log_oom();
+
+                local = ll;
+
+                if (!machine_name_is_valid(local)) {
+                        log_error("Local image name '%s' is not valid.", local);
+                        return -EINVAL;
+                }
+
+                if (!arg_force) {
+                        r = image_find(local, NULL);
+                        if (r < 0)
+                                return log_error_errno(r, "Failed to check whether image '%s' exists: %m", local);
+                        else if (r > 0) {
+                                log_error_errno(EEXIST, "Image '%s' already exists.", local);
+                                return -EEXIST;
+                        }
+                }
+        } else
+                local = "imported";
+
+        if (path) {
+                open_fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY);
+                if (open_fd < 0)
+                        return log_error_errno(errno, "Failed to open tar image to import: %m");
+
+                fd = open_fd;
+
+                log_info("Importing '%s', saving as '%s'.", path, local);
+        } else {
+                _cleanup_free_ char *pretty = NULL;
+
+                fd = STDIN_FILENO;
+
+                (void) readlink_malloc("/proc/self/fd/0", &pretty);
+                log_info("Importing '%s', saving as '%s'.", strna(pretty), local);
+        }
+
+        r = sd_event_default(&event);
+        if (r < 0)
+                return log_error_errno(r, "Failed to allocate event loop: %m");
+
+        assert_se(sigprocmask_many(SIG_BLOCK, SIGTERM, SIGINT, -1) == 0);
+        sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler,  NULL);
+        sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL);
+
+        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, local, arg_force, arg_read_only);
+        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_event_unref_ sd_event *event = NULL;
+        const char *path = NULL, *local = NULL;
+        _cleanup_free_ char *ll = NULL;
+        _cleanup_close_ int open_fd = -1;
+        int r, fd;
+
+        if (argc >= 2)
+                path = argv[1];
+        if (isempty(path) || streq(path, "-"))
+                path = NULL;
+
+        if (argc >= 3)
+                local = argv[2];
+        else if (path)
+                local = basename(path);
+        if (isempty(local) || streq(local, "-"))
+                local = NULL;
+
+        if (local) {
+                r = raw_strip_suffixes(local, &ll);
+                if (r < 0)
+                        return log_oom();
+
+                local = ll;
+
+                if (!machine_name_is_valid(local)) {
+                        log_error("Local image name '%s' is not valid.", local);
+                        return -EINVAL;
+                }
+
+                if (!arg_force) {
+                        r = image_find(local, NULL);
+                        if (r < 0)
+                                return log_error_errno(r, "Failed to check whether image '%s' exists: %m", local);
+                        else if (r > 0) {
+                                log_error_errno(EEXIST, "Image '%s' already exists.", local);
+                                return -EEXIST;
+                        }
+                }
+        } else
+                local = "imported";
+
+        if (path) {
+                open_fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY);
+                if (open_fd < 0)
+                        return log_error_errno(errno, "Failed to open raw image to import: %m");
+
+                fd = open_fd;
+
+                log_info("Importing '%s', saving as '%s'.", path, local);
+        } else {
+                _cleanup_free_ char *pretty = NULL;
+
+                fd = STDIN_FILENO;
+
+                (void) readlink_malloc("/proc/self/fd/0", &pretty);
+                log_info("Importing '%s', saving as '%s'.", pretty, local);
+        }
+
+        r = sd_event_default(&event);
+        if (r < 0)
+                return log_error_errno(r, "Failed to allocate event loop: %m");
+
+        assert_se(sigprocmask_many(SIG_BLOCK, SIGTERM, SIGINT, -1) == 0);
+        sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler,  NULL);
+        sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL);
+
+        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, local, arg_force, arg_read_only);
+        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("%s [OPTIONS...] {COMMAND} ...\n\n"
+               "Import container or virtual machine image.\n\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\n"
+               "Commands:\n"
+               "  tar FILE [NAME]              Download a TAR image\n"
+               "  raw FILE [NAME]              Download a RAW image\n",
+               program_invocation_short_name);
+
+        return 0;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+        enum {
+                ARG_VERSION = 0x100,
+                ARG_FORCE,
+                ARG_IMAGE_ROOT,
+                ARG_READ_ONLY,
+        };
+
+        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       },
+                {}
+        };
+
+        int 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:
+                        puts(PACKAGE_STRING);
+                        puts(SYSTEMD_FEATURES);
+                        return 0;
+
+                case ARG_FORCE:
+                        arg_force = true;
+                        break;
+
+                case ARG_IMAGE_ROOT:
+                        arg_image_root = optarg;
+                        break;
+
+                case ARG_READ_ONLY:
+                        arg_read_only = true;
+                        break;
+
+                case '?':
+                        return -EINVAL;
+
+                default:
+                        assert_not_reached("Unhandled option");
+                }
+
+        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);
+}
+
+int main(int argc, char *argv[]) {
+        int r;
+
+        setlocale(LC_ALL, "");
+        log_parse_environment();
+        log_open();
+
+        r = parse_argv(argc, argv);
+        if (r <= 0)
+                goto finish;
+
+        ignore_signals(SIGPIPE, -1);
+
+        r = import_main(argc, argv);
+
+finish:
+        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}