#include <curl/curl.h>

#include <linux/fs.h>

#include <sys/xattr.h>

#include "sd-daemon.h"

#include "btrfs-util.h"

#include "copy.h"

#include "curl-util.h"

#include "fd-util.h"

#include "fileio.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 "utf8.h"

#include "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 *settings_job;

PullJob *checksum_job;

PullJob *signature_job;

RawPullFinished on_finished;

void *userdata;

char *local;

bool force_local;

bool grow_machine_directory;

bool settings;

char *final_path;

char *temp_path;

char *settings_path;

char *settings_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->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->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 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->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->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);

r = chattr_fd(converted_fd, FS_NOCOW_FL, 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->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();

}

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

r = chattr_fd(dfd, FS_NOCOW_FL, 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, (uint64_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);

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, 0644, i->force_local, 0);

if (r == -EEXIST)

log_warning_errno(r, "Settings file %s already exists, not replacing.", local_settings);

else if (r < 0 && r != -ENOENT)

log_warning_errno(r, "Failed to copy settings files %s, ignoring: %m", local_settings);

else

log_info("Created new settings file '%s.nspawn'", i->local);

}

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->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 raw_pull_job_on_finished(PullJob *j) {

RawPull *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

if (!raw_pull_is_done(i))

return;

if (i->settings_job)

i->settings_job->disk_fd = safe_close(i->settings_job->disk_fd);

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->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);

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;

}

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);

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);

}

}

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_raw(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, NULL, &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, FS_NOCOW_FL, FS_NOCOW_FL);

if (r < 0)

log_warning_errno(errno, "Failed to set file attributes on %s: %m", i->temp_path);

return 0;

}

static int raw_pull_job_on_open_disk_settings(PullJob *j) {

RawPull *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 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) {

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;

/* 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;

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;

if (settings) {

r = pull_make_settings_job(&i->settings_job, url, 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_find_old_etags(i->settings_job->url, i->image_root, DT_REG, ".settings-", NULL, &i->settings_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->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;

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;

}