+++ /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 "import-common.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, 0664);
- 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");
- }
-
- (void) 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 = import_make_read_only_fd(i->raw_job->disk_fd);
- 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 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();
-
- (void) mkdir_parents_label(i->temp_path, 0700);
-
- j->disk_fd = open(i->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->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