./tools/notsd-move

1 files changed, 564 insertions, 0 deletions

diff --git a/src/grp-machine/grp-import/systemd-pull/pull-tar.c b/src/grp-machine/grp-import/systemd-pull/pull-tar.c
new file mode 100644
index 0000000000..fbc7accaed
--- /dev/null
+++ b/src/grp-machine/grp-import/systemd-pull/pull-tar.c
@@ -0,0 +1,564 @@
+/***
+  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 <curl/curl.h>
+#include <sys/prctl.h>
+
+#include <systemd/sd-daemon.h>
+
+#include "import-common.h"
+#include "systemd-basic/alloc-util.h"
+#include "systemd-basic/btrfs-util.h"
+#include "systemd-basic/copy.h"
+#include "systemd-basic/fd-util.h"
+#include "systemd-basic/fileio.h"
+#include "systemd-basic/fs-util.h"
+#include "systemd-basic/hostname-util.h"
+#include "systemd-basic/macro.h"
+#include "systemd-basic/mkdir.h"
+#include "systemd-basic/path-util.h"
+#include "systemd-basic/process-util.h"
+#include "systemd-basic/rm-rf.h"
+#include "systemd-basic/string-util.h"
+#include "systemd-basic/strv.h"
+#include "systemd-basic/utf8.h"
+#include "systemd-basic/util.h"
+#include "systemd-basic/web-util.h"
+#include "systemd-shared/import-util.h"
+
+#include "curl-util.h"
+#include "pull-common.h"
+#include "pull-job.h"
+#include "pull-tar.h"
+
+typedef enum TarProgress {
+        TAR_DOWNLOADING,
+        TAR_VERIFYING,
+        TAR_FINALIZING,
+        TAR_COPYING,
+} TarProgress;
+
+struct TarPull {
+        sd_event *event;
+        CurlGlue *glue;
+
+        char *image_root;
+
+        PullJob *tar_job;
+        PullJob *settings_job;
+        PullJob *checksum_job;
+        PullJob *signature_job;
+
+        TarPullFinished on_finished;
+        void *userdata;
+
+        char *local;
+        bool force_local;
+        bool grow_machine_directory;
+        bool settings;
+
+        pid_t tar_pid;
+
+        char *final_path;
+        char *temp_path;
+
+        char *settings_path;
+        char *settings_temp_path;
+
+        ImportVerify verify;
+};
+
+TarPull* tar_pull_unref(TarPull *i) {
+        if (!i)
+                return NULL;
+
+        if (i->tar_pid > 1) {
+                (void) kill_and_sigcont(i->tar_pid, SIGKILL);
+                (void) wait_for_terminate(i->tar_pid, NULL);
+        }
+
+        pull_job_unref(i->tar_job);
+        pull_job_unref(i->settings_job);
+        pull_job_unref(i->checksum_job);
+        pull_job_unref(i->signature_job);
+
+        curl_glue_unref(i->glue);
+        sd_event_unref(i->event);
+
+        if (i->temp_path) {
+                (void) rm_rf(i->temp_path, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME);
+                free(i->temp_path);
+        }
+
+        if (i->settings_temp_path) {
+                (void) unlink(i->settings_temp_path);
+                free(i->settings_temp_path);
+        }
+
+        free(i->final_path);
+        free(i->settings_path);
+        free(i->image_root);
+        free(i->local);
+        free(i);
+
+        return NULL;
+}
+
+int tar_pull_new(
+                TarPull **ret,
+                sd_event *event,
+                const char *image_root,
+                TarPullFinished on_finished,
+                void *userdata) {
+
+        _cleanup_(tar_pull_unrefp) TarPull *i = NULL;
+        int r;
+
+        assert(ret);
+
+        i = new0(TarPull, 1);
+        if (!i)
+                return -ENOMEM;
+
+        i->on_finished = on_finished;
+        i->userdata = userdata;
+
+        i->image_root = strdup(image_root ?: "/var/lib/machines");
+        if (!i->image_root)
+                return -ENOMEM;
+
+        i->grow_machine_directory = path_startswith(i->image_root, "/var/lib/machines");
+
+        if (event)
+                i->event = sd_event_ref(event);
+        else {
+                r = sd_event_default(&i->event);
+                if (r < 0)
+                        return r;
+        }
+
+        r = curl_glue_new(&i->glue, i->event);
+        if (r < 0)
+                return r;
+
+        i->glue->on_finished = pull_job_curl_on_finished;
+        i->glue->userdata = i;
+
+        *ret = i;
+        i = NULL;
+
+        return 0;
+}
+
+static void tar_pull_report_progress(TarPull *i, TarProgress p) {
+        unsigned percent;
+
+        assert(i);
+
+        switch (p) {
+
+        case TAR_DOWNLOADING: {
+                unsigned remain = 85;
+
+                percent = 0;
+
+                if (i->settings_job) {
+                        percent += i->settings_job->progress_percent * 5 / 100;
+                        remain -= 5;
+                }
+
+                if (i->checksum_job) {
+                        percent += i->checksum_job->progress_percent * 5 / 100;
+                        remain -= 5;
+                }
+
+                if (i->signature_job) {
+                        percent += i->signature_job->progress_percent * 5 / 100;
+                        remain -= 5;
+                }
+
+                if (i->tar_job)
+                        percent += i->tar_job->progress_percent * remain / 100;
+                break;
+        }
+
+        case TAR_VERIFYING:
+                percent = 85;
+                break;
+
+        case TAR_FINALIZING:
+                percent = 90;
+                break;
+
+        case TAR_COPYING:
+                percent = 95;
+                break;
+
+        default:
+                assert_not_reached("Unknown progress state");
+        }
+
+        sd_notifyf(false, "X_IMPORT_PROGRESS=%u", percent);
+        log_debug("Combined progress %u%%", percent);
+}
+
+static int tar_pull_make_local_copy(TarPull *i) {
+        int r;
+
+        assert(i);
+        assert(i->tar_job);
+
+        if (!i->local)
+                return 0;
+
+        if (!i->final_path) {
+                r = pull_make_path(i->tar_job->url, i->tar_job->etag, i->image_root, ".tar-", NULL, &i->final_path);
+                if (r < 0)
+                        return log_oom();
+        }
+
+        r = pull_make_local_copy(i->final_path, i->image_root, i->local, i->force_local);
+        if (r < 0)
+                return r;
+
+        if (i->settings) {
+                const char *local_settings;
+                assert(i->settings_job);
+
+                if (!i->settings_path) {
+                        r = pull_make_path(i->settings_job->url, i->settings_job->etag, i->image_root, ".settings-", NULL, &i->settings_path);
+                        if (r < 0)
+                                return log_oom();
+                }
+
+                local_settings = strjoina(i->image_root, "/", i->local, ".nspawn");
+
+                r = copy_file_atomic(i->settings_path, local_settings, 0664, i->force_local, 0);
+                if (r == -EEXIST)
+                        log_warning_errno(r, "Settings file %s already exists, not replacing.", local_settings);
+                else if (r == -ENOENT)
+                        log_debug_errno(r, "Skipping creation of settings file, since none was found.");
+                else if (r < 0)
+                        log_warning_errno(r, "Failed to copy settings files %s, ignoring: %m", local_settings);
+                else
+                        log_info("Created new settings file %s.", local_settings);
+        }
+
+        return 0;
+}
+
+static bool tar_pull_is_done(TarPull *i) {
+        assert(i);
+        assert(i->tar_job);
+
+        if (!PULL_JOB_IS_COMPLETE(i->tar_job))
+                return false;
+        if (i->settings_job && !PULL_JOB_IS_COMPLETE(i->settings_job))
+                return false;
+        if (i->checksum_job && !PULL_JOB_IS_COMPLETE(i->checksum_job))
+                return false;
+        if (i->signature_job && !PULL_JOB_IS_COMPLETE(i->signature_job))
+                return false;
+
+        return true;
+}
+
+static void tar_pull_job_on_finished(PullJob *j) {
+        TarPull *i;
+        int r;
+
+        assert(j);
+        assert(j->userdata);
+
+        i = j->userdata;
+
+        if (j == i->settings_job) {
+                if (j->error != 0)
+                        log_info_errno(j->error, "Settings file could not be retrieved, proceeding without.");
+        } else if (j->error != 0) {
+                if (j == i->checksum_job)
+                        log_error_errno(j->error, "Failed to retrieve SHA256 checksum, cannot verify. (Try --verify=no?)");
+                else if (j == i->signature_job)
+                        log_error_errno(j->error, "Failed to retrieve signature file, cannot verify. (Try --verify=no?)");
+                else
+                        log_error_errno(j->error, "Failed to retrieve image file. (Wrong URL?)");
+
+                r = j->error;
+                goto finish;
+        }
+
+        /* This is invoked if either the download completed
+         * successfully, or the download was skipped because we
+         * already have the etag. */
+
+        if (!tar_pull_is_done(i))
+                return;
+
+        i->tar_job->disk_fd = safe_close(i->tar_job->disk_fd);
+        if (i->settings_job)
+                i->settings_job->disk_fd = safe_close(i->settings_job->disk_fd);
+
+        if (i->tar_pid > 0) {
+                r = wait_for_terminate_and_warn("tar", i->tar_pid, true);
+                i->tar_pid = 0;
+                if (r < 0)
+                        goto finish;
+                if (r > 0) {
+                        r = -EIO;
+                        goto finish;
+                }
+        }
+
+        if (!i->tar_job->etag_exists) {
+                /* This is a new download, verify it, and move it into place */
+
+                tar_pull_report_progress(i, TAR_VERIFYING);
+
+                r = pull_verify(i->tar_job, i->settings_job, i->checksum_job, i->signature_job);
+                if (r < 0)
+                        goto finish;
+
+                tar_pull_report_progress(i, TAR_FINALIZING);
+
+                r = import_make_read_only(i->temp_path);
+                if (r < 0)
+                        goto finish;
+
+                r = rename_noreplace(AT_FDCWD, i->temp_path, AT_FDCWD, i->final_path);
+                if (r < 0) {
+                        log_error_errno(r, "Failed to rename to final image name: %m");
+                        goto finish;
+                }
+
+                i->temp_path = mfree(i->temp_path);
+
+                if (i->settings_job &&
+                    i->settings_job->error == 0 &&
+                    !i->settings_job->etag_exists) {
+
+                        assert(i->settings_temp_path);
+                        assert(i->settings_path);
+
+                        /* Also move the settings file into place, if
+                         * it exist. Note that we do so only if we
+                         * also moved the tar file in place, to keep
+                         * things strictly in sync. */
+
+                        r = import_make_read_only(i->settings_temp_path);
+                        if (r < 0)
+                                goto finish;
+
+                        r = rename_noreplace(AT_FDCWD, i->settings_temp_path, AT_FDCWD, i->settings_path);
+                        if (r < 0) {
+                                log_error_errno(r, "Failed to rename settings file: %m");
+                                goto finish;
+                        }
+
+                        i->settings_temp_path = mfree(i->settings_temp_path);
+                }
+        }
+
+        tar_pull_report_progress(i, TAR_COPYING);
+
+        r = tar_pull_make_local_copy(i);
+        if (r < 0)
+                goto finish;
+
+        r = 0;
+
+finish:
+        if (i->on_finished)
+                i->on_finished(i, r, i->userdata);
+        else
+                sd_event_exit(i->event, r);
+}
+
+static int tar_pull_job_on_open_disk_tar(PullJob *j) {
+        TarPull *i;
+        int r;
+
+        assert(j);
+        assert(j->userdata);
+
+        i = j->userdata;
+        assert(i->tar_job == j);
+        assert(!i->final_path);
+        assert(!i->temp_path);
+        assert(i->tar_pid <= 0);
+
+        r = pull_make_path(j->url, j->etag, i->image_root, ".tar-", NULL, &i->final_path);
+        if (r < 0)
+                return log_oom();
+
+        r = tempfn_random(i->final_path, NULL, &i->temp_path);
+        if (r < 0)
+                return log_oom();
+
+        mkdir_parents_label(i->temp_path, 0700);
+
+        r = btrfs_subvol_make(i->temp_path);
+        if (r == -ENOTTY) {
+                if (mkdir(i->temp_path, 0755) < 0)
+                        return log_error_errno(errno, "Failed to create directory %s: %m", i->temp_path);
+        } else if (r < 0)
+                return log_error_errno(r, "Failed to create subvolume %s: %m", i->temp_path);
+        else
+                (void) import_assign_pool_quota_and_warn(i->temp_path);
+
+        j->disk_fd = import_fork_tar_x(i->temp_path, &i->tar_pid);
+        if (j->disk_fd < 0)
+                return j->disk_fd;
+
+        return 0;
+}
+
+static int tar_pull_job_on_open_disk_settings(PullJob *j) {
+        TarPull *i;
+        int r;
+
+        assert(j);
+        assert(j->userdata);
+
+        i = j->userdata;
+        assert(i->settings_job == j);
+        assert(!i->settings_path);
+        assert(!i->settings_temp_path);
+
+        r = pull_make_path(j->url, j->etag, i->image_root, ".settings-", NULL, &i->settings_path);
+        if (r < 0)
+                return log_oom();
+
+        r = tempfn_random(i->settings_path, NULL, &i->settings_temp_path);
+        if (r < 0)
+                return log_oom();
+
+        mkdir_parents_label(i->settings_temp_path, 0700);
+
+        j->disk_fd = open(i->settings_temp_path, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0664);
+        if (j->disk_fd < 0)
+                return log_error_errno(errno, "Failed to create %s: %m", i->settings_temp_path);
+
+        return 0;
+}
+
+static void tar_pull_job_on_progress(PullJob *j) {
+        TarPull *i;
+
+        assert(j);
+        assert(j->userdata);
+
+        i = j->userdata;
+
+        tar_pull_report_progress(i, TAR_DOWNLOADING);
+}
+
+int tar_pull_start(
+                TarPull *i,
+                const char *url,
+                const char *local,
+                bool force_local,
+                ImportVerify verify,
+                bool settings) {
+
+        int r;
+
+        assert(i);
+        assert(verify < _IMPORT_VERIFY_MAX);
+        assert(verify >= 0);
+
+        if (!http_url_is_valid(url))
+                return -EINVAL;
+
+        if (local && !machine_name_is_valid(local))
+                return -EINVAL;
+
+        if (i->tar_job)
+                return -EBUSY;
+
+        r = free_and_strdup(&i->local, local);
+        if (r < 0)
+                return r;
+
+        i->force_local = force_local;
+        i->verify = verify;
+        i->settings = settings;
+
+        /* Set up download job for TAR file */
+        r = pull_job_new(&i->tar_job, url, i->glue, i);
+        if (r < 0)
+                return r;
+
+        i->tar_job->on_finished = tar_pull_job_on_finished;
+        i->tar_job->on_open_disk = tar_pull_job_on_open_disk_tar;
+        i->tar_job->on_progress = tar_pull_job_on_progress;
+        i->tar_job->calc_checksum = verify != IMPORT_VERIFY_NO;
+        i->tar_job->grow_machine_directory = i->grow_machine_directory;
+
+        r = pull_find_old_etags(url, i->image_root, DT_DIR, ".tar-", NULL, &i->tar_job->old_etags);
+        if (r < 0)
+                return r;
+
+        /* Set up download job for the settings file (.nspawn) */
+        if (settings) {
+                r = pull_make_settings_job(&i->settings_job, url, i->glue, tar_pull_job_on_finished, i);
+                if (r < 0)
+                        return r;
+
+                i->settings_job->on_open_disk = tar_pull_job_on_open_disk_settings;
+                i->settings_job->on_progress = tar_pull_job_on_progress;
+                i->settings_job->calc_checksum = verify != IMPORT_VERIFY_NO;
+
+                r = pull_find_old_etags(i->settings_job->url, i->image_root, DT_REG, ".settings-", NULL, &i->settings_job->old_etags);
+                if (r < 0)
+                        return r;
+        }
+
+        /* Set up download of checksum/signature files */
+        r = pull_make_verification_jobs(&i->checksum_job, &i->signature_job, verify, url, i->glue, tar_pull_job_on_finished, i);
+        if (r < 0)
+                return r;
+
+        r = pull_job_begin(i->tar_job);
+        if (r < 0)
+                return r;
+
+        if (i->settings_job) {
+                r = pull_job_begin(i->settings_job);
+                if (r < 0)
+                        return r;
+        }
+
+        if (i->checksum_job) {
+                i->checksum_job->on_progress = tar_pull_job_on_progress;
+
+                r = pull_job_begin(i->checksum_job);
+                if (r < 0)
+                        return r;
+        }
+
+        if (i->signature_job) {
+                i->signature_job->on_progress = tar_pull_job_on_progress;
+
+                r = pull_job_begin(i->signature_job);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}