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|
/* SPDX-License-Identifier: LGPL-2.1+ */
#include <curl/curl.h>
#include <linux/fs.h>
#include <sys/xattr.h>
#include "sd-daemon.h"
#include "alloc-util.h"
#include "btrfs-util.h"
#include "copy.h"
#include "curl-util.h"
#include "fd-util.h"
#include "fs-util.h"
#include "hostname-util.h"
#include "import-common.h"
#include "import-util.h"
#include "macro.h"
#include "mkdir.h"
#include "path-util.h"
#include "pull-common.h"
#include "pull-job.h"
#include "pull-raw.h"
#include "qcow2-util.h"
#include "rm-rf.h"
#include "string-util.h"
#include "strv.h"
#include "tmpfile-util.h"
#include "utf8.h"
#include "util.h"
#include "web-util.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 *roothash_job;
PullJob *settings_job;
PullJob *checksum_job;
PullJob *signature_job;
RawPullFinished on_finished;
void *userdata;
char *local;
bool force_local;
bool settings;
bool roothash;
char *final_path;
char *temp_path;
char *settings_path;
char *settings_temp_path;
char *roothash_path;
char *roothash_temp_path;
ImportVerify verify;
};
RawPull* raw_pull_unref(RawPull *i) {
if (!i)
return NULL;
pull_job_unref(i->raw_job);
pull_job_unref(i->settings_job);
pull_job_unref(i->roothash_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);
}
if (i->roothash_temp_path) {
(void) unlink(i->roothash_temp_path);
free(i->roothash_temp_path);
}
if (i->settings_temp_path) {
(void) unlink(i->settings_temp_path);
free(i->settings_temp_path);
}
free(i->final_path);
free(i->roothash_path);
free(i->settings_path);
free(i->image_root);
free(i->local);
return mfree(i);
}
int raw_pull_new(
RawPull **ret,
sd_event *event,
const char *image_root,
RawPullFinished on_finished,
void *userdata) {
_cleanup_(curl_glue_unrefp) CurlGlue *g = NULL;
_cleanup_(sd_event_unrefp) sd_event *e = NULL;
_cleanup_(raw_pull_unrefp) RawPull *i = NULL;
_cleanup_free_ char *root = NULL;
int r;
assert(ret);
root = strdup(image_root ?: "/var/lib/machines");
if (!root)
return -ENOMEM;
if (event)
e = sd_event_ref(event);
else {
r = sd_event_default(&e);
if (r < 0)
return r;
}
r = curl_glue_new(&g, e);
if (r < 0)
return r;
i = new(RawPull, 1);
if (!i)
return -ENOMEM;
*i = (RawPull) {
.on_finished = on_finished,
.userdata = userdata,
.image_root = TAKE_PTR(root),
.event = TAKE_PTR(e),
.glue = TAKE_PTR(g),
};
i->glue->on_finished = pull_job_curl_on_finished;
i->glue->userdata = i;
*ret = TAKE_PTR(i);
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->settings_job) {
percent += i->settings_job->progress_percent * 5 / 100;
remain -= 5;
}
if (i->roothash_job) {
percent += i->roothash_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->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, NULL, &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);
(void) import_set_nocow_and_log(converted_fd, t);
log_info("Unpacking QCOW2 file.");
r = qcow2_convert(i->raw_job->disk_fd, converted_fd);
if (r < 0) {
(void) unlink(t);
return log_error_errno(r, "Failed to convert qcow2 image: %m");
}
(void) unlink(i->temp_path);
free_and_replace(i->temp_path, t);
CLOSE_AND_REPLACE(i->raw_job->disk_fd, converted_fd);
return 1;
}
static int raw_pull_determine_path(RawPull *i, const char *suffix, char **field) {
int r;
assert(i);
assert(field);
if (*field)
return 0;
assert(i->raw_job);
r = pull_make_path(i->raw_job->url, i->raw_job->etag, i->image_root, ".raw-", suffix, field);
if (r < 0)
return log_oom();
return 1;
}
static int raw_pull_copy_auxiliary_file(
RawPull *i,
const char *suffix,
char **path) {
const char *local;
int r;
assert(i);
assert(suffix);
assert(path);
r = raw_pull_determine_path(i, suffix, path);
if (r < 0)
return r;
local = strjoina(i->image_root, "/", i->local, suffix);
r = copy_file_atomic(*path, local, 0644, 0, 0, COPY_REFLINK | (i->force_local ? COPY_REPLACE : 0));
if (r == -EEXIST)
log_warning_errno(r, "File %s already exists, not replacing.", local);
else if (r == -ENOENT)
log_debug_errno(r, "Skipping creation of auxiliary file, since none was found.");
else if (r < 0)
log_warning_errno(r, "Failed to copy file %s, ignoring: %m", local);
else
log_info("Created new file %s.", local);
return 0;
}
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);
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) rm_rf(p, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME);
r = tempfn_random(p, NULL, &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. */
(void) import_set_nocow_and_log(dfd, tp);
r = copy_bytes(i->raw_job->disk_fd, dfd, (uint64_t) -1, COPY_REFLINK);
if (r < 0) {
(void) unlink(tp);
return log_error_errno(r, "Failed to make writable copy of image: %m");
}
(void) copy_times(i->raw_job->disk_fd, dfd, COPY_CRTIME);
(void) copy_xattr(i->raw_job->disk_fd, dfd);
dfd = safe_close(dfd);
r = rename(tp, p);
if (r < 0) {
r = log_error_errno(errno, "Failed to move writable image into place: %m");
(void) unlink(tp);
return r;
}
log_info("Created new local image '%s'.", i->local);
if (i->roothash) {
r = raw_pull_copy_auxiliary_file(i, ".roothash", &i->roothash_path);
if (r < 0)
return r;
}
if (i->settings) {
r = raw_pull_copy_auxiliary_file(i, ".nspawn", &i->settings_path);
if (r < 0)
return r;
}
return 0;
}
static bool raw_pull_is_done(RawPull *i) {
assert(i);
assert(i->raw_job);
if (!PULL_JOB_IS_COMPLETE(i->raw_job))
return false;
if (i->roothash_job && !PULL_JOB_IS_COMPLETE(i->roothash_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 int raw_pull_rename_auxiliary_file(
RawPull *i,
const char *suffix,
char **temp_path,
char **path) {
int r;
assert(i);
assert(temp_path);
assert(suffix);
assert(path);
/* Regenerate final name for this auxiliary file, we might know the etag of the file now, and we should
* incorporate it in the file name if we can */
*path = mfree(*path);
r = raw_pull_determine_path(i, suffix, path);
if (r < 0)
return r;
r = import_make_read_only(*temp_path);
if (r < 0)
return r;
r = rename_noreplace(AT_FDCWD, *temp_path, AT_FDCWD, *path);
if (r < 0)
return log_error_errno(r, "Failed to rename file %s to %s: %m", *temp_path, *path);
*temp_path = mfree(*temp_path);
return 1;
}
static void raw_pull_job_on_finished(PullJob *j) {
RawPull *i;
int r;
assert(j);
assert(j->userdata);
i = j->userdata;
if (j == i->roothash_job) {
if (j->error != 0)
log_info_errno(j->error, "Root hash file could not be retrieved, proceeding without.");
} else 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 && j != i->signature_job) {
if (j == i->checksum_job)
log_error_errno(j->error, "Failed to retrieve SHA256 checksum, 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->signature_job && i->checksum_job->style == VERIFICATION_PER_DIRECTORY && i->signature_job->error != 0) {
log_error_errno(j->error, "Failed to retrieve signature file, cannot verify. (Try --verify=no?)");
r = i->signature_job->error;
goto finish;
}
if (i->roothash_job)
i->roothash_job->disk_fd = safe_close(i->roothash_job->disk_fd);
if (i->settings_job)
i->settings_job->disk_fd = safe_close(i->settings_job->disk_fd);
r = raw_pull_determine_path(i, ".raw", &i->final_path);
if (r < 0)
goto finish;
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->roothash_job, i->settings_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);
if (i->raw_job->etag) {
/* Only make a read-only copy if ETag header is set. */
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 rename raw file to %s: %m", i->final_path);
goto finish;
}
}
i->temp_path = mfree(i->temp_path);
if (i->roothash_job &&
i->roothash_job->error == 0) {
r = raw_pull_rename_auxiliary_file(i, ".roothash", &i->roothash_temp_path, &i->roothash_path);
if (r < 0)
goto finish;
}
if (i->settings_job &&
i->settings_job->error == 0) {
r = raw_pull_rename_auxiliary_file(i, ".nspawn", &i->settings_temp_path, &i->settings_path);
if (r < 0)
goto finish;
}
}
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_generic(
RawPull *i,
PullJob *j,
const char *extra,
char **temp_path) {
int r;
assert(i);
assert(j);
assert(extra);
assert(temp_path);
if (!*temp_path) {
r = tempfn_random_child(i->image_root, extra, temp_path);
if (r < 0)
return log_oom();
}
(void) mkdir_parents_label(*temp_path, 0700);
j->disk_fd = open(*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", *temp_path);
return 0;
}
static int raw_pull_job_on_open_disk_raw(PullJob *j) {
RawPull *i;
int r;
assert(j);
assert(j->userdata);
i = j->userdata;
assert(i->raw_job == j);
r = raw_pull_job_on_open_disk_generic(i, j, "raw", &i->temp_path);
if (r < 0)
return r;
(void) import_set_nocow_and_log(j->disk_fd, i->temp_path);
return 0;
}
static int raw_pull_job_on_open_disk_roothash(PullJob *j) {
RawPull *i;
assert(j);
assert(j->userdata);
i = j->userdata;
assert(i->roothash_job == j);
return raw_pull_job_on_open_disk_generic(i, j, "roothash", &i->roothash_temp_path);
}
static int raw_pull_job_on_open_disk_settings(PullJob *j) {
RawPull *i;
assert(j);
assert(j->userdata);
i = j->userdata;
assert(i->settings_job == j);
return raw_pull_job_on_open_disk_generic(i, j, "settings", &i->settings_temp_path);
}
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,
bool settings,
bool roothash) {
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;
i->settings = settings;
i->roothash = roothash;
/* 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_raw;
i->raw_job->on_progress = raw_pull_job_on_progress;
i->raw_job->calc_checksum = verify != IMPORT_VERIFY_NO;
r = pull_find_old_etags(url, i->image_root, DT_REG, ".raw-", ".raw", &i->raw_job->old_etags);
if (r < 0)
return r;
if (roothash) {
r = pull_make_auxiliary_job(&i->roothash_job, url, raw_strip_suffixes, ".roothash", i->glue, raw_pull_job_on_finished, i);
if (r < 0)
return r;
i->roothash_job->on_open_disk = raw_pull_job_on_open_disk_roothash;
i->roothash_job->on_progress = raw_pull_job_on_progress;
i->roothash_job->calc_checksum = verify != IMPORT_VERIFY_NO;
}
if (settings) {
r = pull_make_auxiliary_job(&i->settings_job, url, raw_strip_suffixes, ".nspawn", i->glue, raw_pull_job_on_finished, i);
if (r < 0)
return r;
i->settings_job->on_open_disk = raw_pull_job_on_open_disk_settings;
i->settings_job->on_progress = raw_pull_job_on_progress;
i->settings_job->calc_checksum = verify != IMPORT_VERIFY_NO;
}
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->roothash_job) {
r = pull_job_begin(i->roothash_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 = raw_pull_job_on_progress;
i->checksum_job->style = VERIFICATION_PER_FILE;
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;
}
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