--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2014 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 <sys/xattr.h>
+#include <linux/fs.h>
+#include <curl/curl.h>
+
+#include "sd-daemon.h"
+#include "utf8.h"
+#include "strv.h"
+#include "copy.h"
+#include "btrfs-util.h"
+#include "util.h"
+#include "macro.h"
+#include "mkdir.h"
+#include "path-util.h"
+#include "import-util.h"
+#include "curl-util.h"
+#include "qcow2-util.h"
+#include "pull-job.h"
+#include "pull-common.h"
+#include "pull-raw.h"
+
+typedef enum RawProgress {
+ RAW_DOWNLOADING,
+ RAW_VERIFYING,
+ RAW_UNPACKING,
+ RAW_FINALIZING,
+ RAW_COPYING,
+} RawProgress;
+
+struct RawPull {
+ sd_event *event;
+ CurlGlue *glue;
+
+ char *image_root;
+
+ PullJob *raw_job;
+ PullJob *checksum_job;
+ PullJob *signature_job;
+
+ RawPullFinished on_finished;
+ void *userdata;
+
+ char *local;
+ bool force_local;
+ bool grow_machine_directory;
+
+ char *temp_path;
+ char *final_path;
+
+ ImportVerify verify;
+};
+
+RawPull* raw_pull_unref(RawPull *i) {
+ if (!i)
+ return NULL;
+
+ pull_job_unref(i->raw_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) unlink(i->temp_path);
+ free(i->temp_path);
+ }
+
+ free(i->final_path);
+ free(i->image_root);
+ free(i->local);
+ free(i);
+
+ return NULL;
+}
+
+int raw_pull_new(
+ RawPull **ret,
+ sd_event *event,
+ const char *image_root,
+ RawPullFinished on_finished,
+ void *userdata) {
+
+ _cleanup_(raw_pull_unrefp) RawPull *i = NULL;
+ int r;
+
+ assert(ret);
+
+ i = new0(RawPull, 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 raw_pull_report_progress(RawPull *i, RawProgress p) {
+ unsigned percent;
+
+ assert(i);
+
+ switch (p) {
+
+ case RAW_DOWNLOADING: {
+ unsigned remain = 80;
+
+ percent = 0;
+
+ 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->raw_job)
+ percent += i->raw_job->progress_percent * remain / 100;
+ break;
+ }
+
+ case RAW_VERIFYING:
+ percent = 80;
+ break;
+
+ case RAW_UNPACKING:
+ percent = 85;
+ break;
+
+ case RAW_FINALIZING:
+ percent = 90;
+ break;
+
+ case RAW_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 raw_pull_maybe_convert_qcow2(RawPull *i) {
+ _cleanup_close_ int converted_fd = -1;
+ _cleanup_free_ char *t = NULL;
+ int r;
+
+ assert(i);
+ assert(i->raw_job);
+
+ r = qcow2_detect(i->raw_job->disk_fd);
+ if (r < 0)
+ return log_error_errno(r, "Failed to detect whether this is a QCOW2 image: %m");
+ if (r == 0)
+ return 0;
+
+ /* This is a QCOW2 image, let's convert it */
+ r = tempfn_random(i->final_path, &t);
+ if (r < 0)
+ return log_oom();
+
+ converted_fd = open(t, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0644);
+ if (converted_fd < 0)
+ return log_error_errno(errno, "Failed to create %s: %m", t);
+
+ r = chattr_fd(converted_fd, true, FS_NOCOW_FL);
+ if (r < 0)
+ log_warning_errno(errno, "Failed to set file attributes on %s: %m", t);
+
+ log_info("Unpacking QCOW2 file.");
+
+ r = qcow2_convert(i->raw_job->disk_fd, converted_fd);
+ if (r < 0) {
+ unlink(t);
+ return log_error_errno(r, "Failed to convert qcow2 image: %m");
+ }
+
+ unlink(i->temp_path);
+ free(i->temp_path);
+
+ i->temp_path = t;
+ t = NULL;
+
+ safe_close(i->raw_job->disk_fd);
+ i->raw_job->disk_fd = converted_fd;
+ converted_fd = -1;
+
+ return 1;
+}
+
+static int raw_pull_make_local_copy(RawPull *i) {
+ _cleanup_free_ char *tp = NULL;
+ _cleanup_close_ int dfd = -1;
+ const char *p;
+ int r;
+
+ assert(i);
+ assert(i->raw_job);
+
+ if (!i->local)
+ return 0;
+
+ if (i->raw_job->etag_exists) {
+ /* We have downloaded this one previously, reopen it */
+
+ assert(i->raw_job->disk_fd < 0);
+
+ if (!i->final_path) {
+ r = pull_make_path(i->raw_job->url, i->raw_job->etag, i->image_root, ".raw-", ".raw", &i->final_path);
+ if (r < 0)
+ return log_oom();
+ }
+
+ i->raw_job->disk_fd = open(i->final_path, O_RDONLY|O_NOCTTY|O_CLOEXEC);
+ if (i->raw_job->disk_fd < 0)
+ return log_error_errno(errno, "Failed to open vendor image: %m");
+ } else {
+ /* We freshly downloaded the image, use it */
+
+ assert(i->raw_job->disk_fd >= 0);
+
+ if (lseek(i->raw_job->disk_fd, SEEK_SET, 0) == (off_t) -1)
+ return log_error_errno(errno, "Failed to seek to beginning of vendor image: %m");
+ }
+
+ p = strjoina(i->image_root, "/", i->local, ".raw");
+
+ if (i->force_local) {
+ (void) btrfs_subvol_remove(p);
+ (void) rm_rf_dangerous(p, false, true, false);
+ }
+
+ r = tempfn_random(p, &tp);
+ if (r < 0)
+ return log_oom();
+
+ dfd = open(tp, O_WRONLY|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0664);
+ if (dfd < 0)
+ return log_error_errno(errno, "Failed to create writable copy of image: %m");
+
+ /* Turn off COW writing. This should greatly improve
+ * performance on COW file systems like btrfs, since it
+ * reduces fragmentation caused by not allowing in-place
+ * writes. */
+ r = chattr_fd(dfd, true, FS_NOCOW_FL);
+ if (r < 0)
+ log_warning_errno(errno, "Failed to set file attributes on %s: %m", tp);
+
+ r = copy_bytes(i->raw_job->disk_fd, dfd, (off_t) -1, true);
+ if (r < 0) {
+ unlink(tp);
+ return log_error_errno(r, "Failed to make writable copy of image: %m");
+ }
+
+ (void) copy_times(i->raw_job->disk_fd, dfd);
+ (void) copy_xattr(i->raw_job->disk_fd, dfd);
+
+ dfd = safe_close(dfd);
+
+ r = rename(tp, p);
+ if (r < 0) {
+ unlink(tp);
+ return log_error_errno(errno, "Failed to move writable image into place: %m");
+ }
+
+ log_info("Created new local image '%s'.", i->local);
+ return 0;
+}
+
+static bool raw_pull_is_done(RawPull *i) {
+ assert(i);
+ assert(i->raw_job);
+
+ if (i->raw_job->state != PULL_JOB_DONE)
+ return false;
+ if (i->checksum_job && i->checksum_job->state != PULL_JOB_DONE)
+ return false;
+ if (i->signature_job && i->signature_job->state != PULL_JOB_DONE)
+ return false;
+
+ return true;
+}
+
+static void raw_pull_job_on_finished(PullJob *j) {
+ RawPull *i;
+ int r;
+
+ assert(j);
+ assert(j->userdata);
+
+ i = j->userdata;
+ 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. In this case ->etag_exists is
+ * true.
+ *
+ * We only do something when we got all three files */
+
+ if (!raw_pull_is_done(i))
+ return;
+
+ if (!i->raw_job->etag_exists) {
+ /* This is a new download, verify it, and move it into place */
+ assert(i->raw_job->disk_fd >= 0);
+
+ raw_pull_report_progress(i, RAW_VERIFYING);
+
+ r = pull_verify(i->raw_job, i->checksum_job, i->signature_job);
+ if (r < 0)
+ goto finish;
+
+ raw_pull_report_progress(i, RAW_UNPACKING);
+
+ r = raw_pull_maybe_convert_qcow2(i);
+ if (r < 0)
+ goto finish;
+
+ raw_pull_report_progress(i, RAW_FINALIZING);
+
+ r = pull_make_read_only_fd(i->raw_job->disk_fd);
+ if (r < 0)
+ goto finish;
+
+ r = rename(i->temp_path, i->final_path);
+ if (r < 0) {
+ r = log_error_errno(errno, "Failed to move RAW file into place: %m");
+ goto finish;
+ }
+
+ free(i->temp_path);
+ i->temp_path = NULL;
+ }
+
+ raw_pull_report_progress(i, RAW_COPYING);
+
+ r = raw_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 raw_pull_job_on_open_disk(PullJob *j) {
+ RawPull *i;
+ int r;
+
+ assert(j);
+ assert(j->userdata);
+
+ i = j->userdata;
+ assert(i->raw_job == j);
+ assert(!i->final_path);
+ assert(!i->temp_path);
+
+ r = pull_make_path(j->url, j->etag, i->image_root, ".raw-", ".raw", &i->final_path);
+ if (r < 0)
+ return log_oom();
+
+ r = tempfn_random(i->final_path, &i->temp_path);
+ if (r <0)
+ return log_oom();
+
+ mkdir_parents_label(i->temp_path, 0700);
+
+ j->disk_fd = open(i->temp_path, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0644);
+ if (j->disk_fd < 0)
+ return log_error_errno(errno, "Failed to create %s: %m", i->temp_path);
+
+ r = chattr_fd(j->disk_fd, true, FS_NOCOW_FL);
+ if (r < 0)
+ log_warning_errno(errno, "Failed to set file attributes on %s: %m", i->temp_path);
+
+ return 0;
+}
+
+static void raw_pull_job_on_progress(PullJob *j) {
+ RawPull *i;
+
+ assert(j);
+ assert(j->userdata);
+
+ i = j->userdata;
+
+ raw_pull_report_progress(i, RAW_DOWNLOADING);
+}
+
+int raw_pull_start(RawPull *i, const char *url, const char *local, bool force_local, ImportVerify verify) {
+ 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->raw_job)
+ return -EBUSY;
+
+ r = free_and_strdup(&i->local, local);
+ if (r < 0)
+ return r;
+ i->force_local = force_local;
+ i->verify = verify;
+
+ /* Queue job for the image itself */
+ r = pull_job_new(&i->raw_job, url, i->glue, i);
+ if (r < 0)
+ return r;
+
+ i->raw_job->on_finished = raw_pull_job_on_finished;
+ i->raw_job->on_open_disk = raw_pull_job_on_open_disk;
+ i->raw_job->on_progress = raw_pull_job_on_progress;
+ i->raw_job->calc_checksum = verify != IMPORT_VERIFY_NO;
+ i->raw_job->grow_machine_directory = i->grow_machine_directory;
+
+ r = pull_find_old_etags(url, i->image_root, DT_REG, ".raw-", ".raw", &i->raw_job->old_etags);
+ if (r < 0)
+ return r;
+
+ r = pull_make_verification_jobs(&i->checksum_job, &i->signature_job, verify, url, i->glue, raw_pull_job_on_finished, i);
+ if (r < 0)
+ return r;
+
+ r = pull_job_begin(i->raw_job);
+ if (r < 0)
+ return r;
+
+ if (i->checksum_job) {
+ i->checksum_job->on_progress = raw_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 = raw_pull_job_on_progress;
+
+ r = pull_job_begin(i->signature_job);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
~ianmdlvl / elogind.git / blobdiff