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authorLennart Poettering <lennart@poettering.net>2015-03-04 17:07:12 +0100
committerLennart Poettering <lennart@poettering.net>2015-03-05 00:59:37 +0100
commitdc2c282b6aac820a3c27d8a7a68c0386300db663 (patch)
tree24928f6aa6130636cc5489ddbc0152222928b767 /src/import/pull-dkr.c
parentcc22955cfefb4bd6e7a135f1ec95fb5a07ba9ce3 (diff)
import: rename download code from "import" to "pull"
That way we can call the code for local container/VM imports "import" without confusion.
Diffstat (limited to 'src/import/pull-dkr.c')
-rw-r--r--src/import/pull-dkr.c896
1 files changed, 896 insertions, 0 deletions
diff --git a/src/import/pull-dkr.c b/src/import/pull-dkr.c
new file mode 100644
index 0000000000..ecbf8063ce
--- /dev/null
+++ b/src/import/pull-dkr.c
@@ -0,0 +1,896 @@
+/*-*- 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 <curl/curl.h>
+#include <sys/prctl.h>
+
+#include "sd-daemon.h"
+#include "json.h"
+#include "strv.h"
+#include "btrfs-util.h"
+#include "utf8.h"
+#include "mkdir.h"
+#include "path-util.h"
+#include "import-util.h"
+#include "curl-util.h"
+#include "aufs-util.h"
+#include "pull-job.h"
+#include "pull-common.h"
+#include "pull-dkr.h"
+
+typedef enum DkrProgress {
+ DKR_SEARCHING,
+ DKR_RESOLVING,
+ DKR_METADATA,
+ DKR_DOWNLOADING,
+ DKR_COPYING,
+} DkrProgress;
+
+struct DkrPull {
+ sd_event *event;
+ CurlGlue *glue;
+
+ char *index_url;
+ char *image_root;
+
+ PullJob *images_job;
+ PullJob *tags_job;
+ PullJob *ancestry_job;
+ PullJob *json_job;
+ PullJob *layer_job;
+
+ char *name;
+ char *tag;
+ char *id;
+
+ char *response_token;
+ char **response_registries;
+
+ char **ancestry;
+ unsigned n_ancestry;
+ unsigned current_ancestry;
+
+ DkrPullFinished on_finished;
+ void *userdata;
+
+ char *local;
+ bool force_local;
+ bool grow_machine_directory;
+
+ char *temp_path;
+ char *final_path;
+
+ pid_t tar_pid;
+};
+
+#define PROTOCOL_PREFIX "https://"
+
+#define HEADER_TOKEN "X-Do" /* the HTTP header for the auth token */ "cker-Token:"
+#define HEADER_REGISTRY "X-Do" /*the HTTP header for the registry */ "cker-Endpoints:"
+
+#define LAYERS_MAX 2048
+
+static void dkr_pull_job_on_finished(PullJob *j);
+
+DkrPull* dkr_pull_unref(DkrPull *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->images_job);
+ pull_job_unref(i->tags_job);
+ pull_job_unref(i->ancestry_job);
+ pull_job_unref(i->json_job);
+ pull_job_unref(i->layer_job);
+
+ curl_glue_unref(i->glue);
+ sd_event_unref(i->event);
+
+ if (i->temp_path) {
+ (void) btrfs_subvol_remove(i->temp_path);
+ (void) rm_rf_dangerous(i->temp_path, false, true, false);
+ free(i->temp_path);
+ }
+
+ free(i->name);
+ free(i->tag);
+ free(i->id);
+ free(i->response_token);
+ free(i->response_registries);
+ strv_free(i->ancestry);
+ free(i->final_path);
+ free(i->index_url);
+ free(i->image_root);
+ free(i->local);
+ free(i);
+
+ return NULL;
+}
+
+int dkr_pull_new(
+ DkrPull **ret,
+ sd_event *event,
+ const char *index_url,
+ const char *image_root,
+ DkrPullFinished on_finished,
+ void *userdata) {
+
+ _cleanup_(dkr_pull_unrefp) DkrPull *i = NULL;
+ char *e;
+ int r;
+
+ assert(ret);
+ assert(index_url);
+
+ if (!http_url_is_valid(index_url))
+ return -EINVAL;
+
+ i = new0(DkrPull, 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");
+
+ i->index_url = strdup(index_url);
+ if (!i->index_url)
+ return -ENOMEM;
+
+ e = endswith(i->index_url, "/");
+ if (e)
+ *e = 0;
+
+ 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 dkr_pull_report_progress(DkrPull *i, DkrProgress p) {
+ unsigned percent;
+
+ assert(i);
+
+ switch (p) {
+
+ case DKR_SEARCHING:
+ percent = 0;
+ if (i->images_job)
+ percent += i->images_job->progress_percent * 5 / 100;
+ break;
+
+ case DKR_RESOLVING:
+ percent = 5;
+ if (i->tags_job)
+ percent += i->tags_job->progress_percent * 5 / 100;
+ break;
+
+ case DKR_METADATA:
+ percent = 10;
+ if (i->ancestry_job)
+ percent += i->ancestry_job->progress_percent * 5 / 100;
+ if (i->json_job)
+ percent += i->json_job->progress_percent * 5 / 100;
+ break;
+
+ case DKR_DOWNLOADING:
+ percent = 20;
+ percent += 75 * i->current_ancestry / MAX(1U, i->n_ancestry);
+ if (i->layer_job)
+ percent += i->layer_job->progress_percent * 75 / MAX(1U, i->n_ancestry) / 100;
+
+ break;
+
+ case DKR_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 parse_id(const void *payload, size_t size, char **ret) {
+ _cleanup_free_ char *buf = NULL, *id = NULL, *other = NULL;
+ union json_value v = {};
+ void *json_state = NULL;
+ const char *p;
+ int t;
+
+ assert(payload);
+ assert(ret);
+
+ if (size <= 0)
+ return -EBADMSG;
+
+ if (memchr(payload, 0, size))
+ return -EBADMSG;
+
+ buf = strndup(payload, size);
+ if (!buf)
+ return -ENOMEM;
+
+ p = buf;
+ t = json_tokenize(&p, &id, &v, &json_state, NULL);
+ if (t < 0)
+ return t;
+ if (t != JSON_STRING)
+ return -EBADMSG;
+
+ t = json_tokenize(&p, &other, &v, &json_state, NULL);
+ if (t < 0)
+ return t;
+ if (t != JSON_END)
+ return -EBADMSG;
+
+ if (!dkr_id_is_valid(id))
+ return -EBADMSG;
+
+ *ret = id;
+ id = NULL;
+
+ return 0;
+}
+
+static int parse_ancestry(const void *payload, size_t size, char ***ret) {
+ _cleanup_free_ char *buf = NULL;
+ void *json_state = NULL;
+ const char *p;
+ enum {
+ STATE_BEGIN,
+ STATE_ITEM,
+ STATE_COMMA,
+ STATE_END,
+ } state = STATE_BEGIN;
+ _cleanup_strv_free_ char **l = NULL;
+ size_t n = 0, allocated = 0;
+
+ if (size <= 0)
+ return -EBADMSG;
+
+ if (memchr(payload, 0, size))
+ return -EBADMSG;
+
+ buf = strndup(payload, size);
+ if (!buf)
+ return -ENOMEM;
+
+ p = buf;
+ for (;;) {
+ _cleanup_free_ char *str;
+ union json_value v = {};
+ int t;
+
+ t = json_tokenize(&p, &str, &v, &json_state, NULL);
+ if (t < 0)
+ return t;
+
+ switch (state) {
+
+ case STATE_BEGIN:
+ if (t == JSON_ARRAY_OPEN)
+ state = STATE_ITEM;
+ else
+ return -EBADMSG;
+
+ break;
+
+ case STATE_ITEM:
+ if (t == JSON_STRING) {
+ if (!dkr_id_is_valid(str))
+ return -EBADMSG;
+
+ if (n+1 > LAYERS_MAX)
+ return -EFBIG;
+
+ if (!GREEDY_REALLOC(l, allocated, n + 2))
+ return -ENOMEM;
+
+ l[n++] = str;
+ str = NULL;
+ l[n] = NULL;
+
+ state = STATE_COMMA;
+
+ } else if (t == JSON_ARRAY_CLOSE)
+ state = STATE_END;
+ else
+ return -EBADMSG;
+
+ break;
+
+ case STATE_COMMA:
+ if (t == JSON_COMMA)
+ state = STATE_ITEM;
+ else if (t == JSON_ARRAY_CLOSE)
+ state = STATE_END;
+ else
+ return -EBADMSG;
+ break;
+
+ case STATE_END:
+ if (t == JSON_END) {
+
+ if (strv_isempty(l))
+ return -EBADMSG;
+
+ if (!strv_is_uniq(l))
+ return -EBADMSG;
+
+ l = strv_reverse(l);
+
+ *ret = l;
+ l = NULL;
+ return 0;
+ } else
+ return -EBADMSG;
+ }
+
+ }
+}
+
+static const char *dkr_pull_current_layer(DkrPull *i) {
+ assert(i);
+
+ if (strv_isempty(i->ancestry))
+ return NULL;
+
+ return i->ancestry[i->current_ancestry];
+}
+
+static const char *dkr_pull_current_base_layer(DkrPull *i) {
+ assert(i);
+
+ if (strv_isempty(i->ancestry))
+ return NULL;
+
+ if (i->current_ancestry <= 0)
+ return NULL;
+
+ return i->ancestry[i->current_ancestry-1];
+}
+
+static int dkr_pull_add_token(DkrPull *i, PullJob *j) {
+ const char *t;
+
+ assert(i);
+ assert(j);
+
+ if (i->response_token)
+ t = strjoina("Authorization: Token ", i->response_token);
+ else
+ t = HEADER_TOKEN " true";
+
+ j->request_header = curl_slist_new("Accept: application/json", t, NULL);
+ if (!j->request_header)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static bool dkr_pull_is_done(DkrPull *i) {
+ assert(i);
+ assert(i->images_job);
+
+ if (i->images_job->state != PULL_JOB_DONE)
+ return false;
+
+ if (!i->tags_job || i->tags_job->state != PULL_JOB_DONE)
+ return false;
+
+ if (!i->ancestry_job || i->ancestry_job->state != PULL_JOB_DONE)
+ return false;
+
+ if (!i->json_job || i->json_job->state != PULL_JOB_DONE)
+ return false;
+
+ if (i->layer_job && i->layer_job->state != PULL_JOB_DONE)
+ return false;
+
+ if (dkr_pull_current_layer(i))
+ return false;
+
+ return true;
+}
+
+static int dkr_pull_make_local_copy(DkrPull *i) {
+ int r;
+
+ assert(i);
+
+ if (!i->local)
+ return 0;
+
+ if (!i->final_path) {
+ i->final_path = strjoin(i->image_root, "/.dkr-", i->id, NULL);
+ if (!i->final_path)
+ return log_oom();
+ }
+
+ r = pull_make_local_copy(i->final_path, i->image_root, i->local, i->force_local);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+static int dkr_pull_job_on_open_disk(PullJob *j) {
+ const char *base;
+ DkrPull *i;
+ int r;
+
+ assert(j);
+ assert(j->userdata);
+
+ i = j->userdata;
+ assert(i->layer_job == j);
+ assert(i->final_path);
+ assert(!i->temp_path);
+ assert(i->tar_pid <= 0);
+
+ r = tempfn_random(i->final_path, &i->temp_path);
+ if (r < 0)
+ return log_oom();
+
+ mkdir_parents_label(i->temp_path, 0700);
+
+ base = dkr_pull_current_base_layer(i);
+ if (base) {
+ const char *base_path;
+
+ base_path = strjoina(i->image_root, "/.dkr-", base);
+ r = btrfs_subvol_snapshot(base_path, i->temp_path, false, true);
+ } else
+ r = btrfs_subvol_make(i->temp_path);
+ if (r < 0)
+ return log_error_errno(r, "Failed to make btrfs subvolume %s: %m", i->temp_path);
+
+ j->disk_fd = pull_fork_tar(i->temp_path, &i->tar_pid);
+ if (j->disk_fd < 0)
+ return j->disk_fd;
+
+ return 0;
+}
+
+static void dkr_pull_job_on_progress(PullJob *j) {
+ DkrPull *i;
+
+ assert(j);
+ assert(j->userdata);
+
+ i = j->userdata;
+
+ dkr_pull_report_progress(
+ i,
+ j == i->images_job ? DKR_SEARCHING :
+ j == i->tags_job ? DKR_RESOLVING :
+ j == i->ancestry_job || j == i->json_job ? DKR_METADATA :
+ DKR_DOWNLOADING);
+}
+
+static int dkr_pull_pull_layer(DkrPull *i) {
+ _cleanup_free_ char *path = NULL;
+ const char *url, *layer = NULL;
+ int r;
+
+ assert(i);
+ assert(!i->layer_job);
+ assert(!i->temp_path);
+ assert(!i->final_path);
+
+ for (;;) {
+ layer = dkr_pull_current_layer(i);
+ if (!layer)
+ return 0; /* no more layers */
+
+ path = strjoin(i->image_root, "/.dkr-", layer, NULL);
+ if (!path)
+ return log_oom();
+
+ if (laccess(path, F_OK) < 0) {
+ if (errno == ENOENT)
+ break;
+
+ return log_error_errno(errno, "Failed to check for container: %m");
+ }
+
+ log_info("Layer %s already exists, skipping.", layer);
+
+ i->current_ancestry++;
+
+ free(path);
+ path = NULL;
+ }
+
+ log_info("Pulling layer %s...", layer);
+
+ i->final_path = path;
+ path = NULL;
+
+ url = strjoina(PROTOCOL_PREFIX, i->response_registries[0], "/v1/images/", layer, "/layer");
+ r = pull_job_new(&i->layer_job, url, i->glue, i);
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate layer job: %m");
+
+ r = dkr_pull_add_token(i, i->layer_job);
+ if (r < 0)
+ return log_oom();
+
+ i->layer_job->on_finished = dkr_pull_job_on_finished;
+ i->layer_job->on_open_disk = dkr_pull_job_on_open_disk;
+ i->layer_job->on_progress = dkr_pull_job_on_progress;
+ i->layer_job->grow_machine_directory = i->grow_machine_directory;
+
+ r = pull_job_begin(i->layer_job);
+ if (r < 0)
+ return log_error_errno(r, "Failed to start layer job: %m");
+
+ return 0;
+}
+
+static void dkr_pull_job_on_finished(PullJob *j) {
+ DkrPull *i;
+ int r;
+
+ assert(j);
+ assert(j->userdata);
+
+ i = j->userdata;
+ if (j->error != 0) {
+ if (j == i->images_job)
+ log_error_errno(j->error, "Failed to retrieve images list. (Wrong index URL?)");
+ else if (j == i->tags_job)
+ log_error_errno(j->error, "Failed to retrieve tags list.");
+ else if (j == i->ancestry_job)
+ log_error_errno(j->error, "Failed to retrieve ancestry list.");
+ else if (j == i->json_job)
+ log_error_errno(j->error, "Failed to retrieve json data.");
+ else
+ log_error_errno(j->error, "Failed to retrieve layer data.");
+
+ r = j->error;
+ goto finish;
+ }
+
+ if (i->images_job == j) {
+ const char *url;
+
+ assert(!i->tags_job);
+ assert(!i->ancestry_job);
+ assert(!i->json_job);
+ assert(!i->layer_job);
+
+ if (strv_isempty(i->response_registries)) {
+ r = -EBADMSG;
+ log_error("Didn't get registry information.");
+ goto finish;
+ }
+
+ log_info("Index lookup succeeded, directed to registry %s.", i->response_registries[0]);
+ dkr_pull_report_progress(i, DKR_RESOLVING);
+
+ url = strjoina(PROTOCOL_PREFIX, i->response_registries[0], "/v1/repositories/", i->name, "/tags/", i->tag);
+ r = pull_job_new(&i->tags_job, url, i->glue, i);
+ if (r < 0) {
+ log_error_errno(r, "Failed to allocate tags job: %m");
+ goto finish;
+ }
+
+ r = dkr_pull_add_token(i, i->tags_job);
+ if (r < 0) {
+ log_oom();
+ goto finish;
+ }
+
+ i->tags_job->on_finished = dkr_pull_job_on_finished;
+ i->tags_job->on_progress = dkr_pull_job_on_progress;
+
+ r = pull_job_begin(i->tags_job);
+ if (r < 0) {
+ log_error_errno(r, "Failed to start tags job: %m");
+ goto finish;
+ }
+
+ } else if (i->tags_job == j) {
+ const char *url;
+ char *id = NULL;
+
+ assert(!i->ancestry_job);
+ assert(!i->json_job);
+ assert(!i->layer_job);
+
+ r = parse_id(j->payload, j->payload_size, &id);
+ if (r < 0) {
+ log_error_errno(r, "Failed to parse JSON id.");
+ goto finish;
+ }
+
+ free(i->id);
+ i->id = id;
+
+ log_info("Tag lookup succeeded, resolved to layer %s.", i->id);
+ dkr_pull_report_progress(i, DKR_METADATA);
+
+ url = strjoina(PROTOCOL_PREFIX, i->response_registries[0], "/v1/images/", i->id, "/ancestry");
+ r = pull_job_new(&i->ancestry_job, url, i->glue, i);
+ if (r < 0) {
+ log_error_errno(r, "Failed to allocate ancestry job: %m");
+ goto finish;
+ }
+
+ r = dkr_pull_add_token(i, i->ancestry_job);
+ if (r < 0) {
+ log_oom();
+ goto finish;
+ }
+
+ i->ancestry_job->on_finished = dkr_pull_job_on_finished;
+ i->ancestry_job->on_progress = dkr_pull_job_on_progress;
+
+ url = strjoina(PROTOCOL_PREFIX, i->response_registries[0], "/v1/images/", i->id, "/json");
+ r = pull_job_new(&i->json_job, url, i->glue, i);
+ if (r < 0) {
+ log_error_errno(r, "Failed to allocate json job: %m");
+ goto finish;
+ }
+
+ r = dkr_pull_add_token(i, i->json_job);
+ if (r < 0) {
+ log_oom();
+ goto finish;
+ }
+
+ i->json_job->on_finished = dkr_pull_job_on_finished;
+ i->json_job->on_progress = dkr_pull_job_on_progress;
+
+ r = pull_job_begin(i->ancestry_job);
+ if (r < 0) {
+ log_error_errno(r, "Failed to start ancestry job: %m");
+ goto finish;
+ }
+
+ r = pull_job_begin(i->json_job);
+ if (r < 0) {
+ log_error_errno(r, "Failed to start json job: %m");
+ goto finish;
+ }
+
+ } else if (i->ancestry_job == j) {
+ char **ancestry = NULL, **k;
+ unsigned n;
+
+ assert(!i->layer_job);
+
+ r = parse_ancestry(j->payload, j->payload_size, &ancestry);
+ if (r < 0) {
+ log_error_errno(r, "Failed to parse JSON id.");
+ goto finish;
+ }
+
+ n = strv_length(ancestry);
+ if (n <= 0 || !streq(ancestry[n-1], i->id)) {
+ log_error("Ancestry doesn't end in main layer.");
+ strv_free(ancestry);
+ r = -EBADMSG;
+ goto finish;
+ }
+
+ log_info("Ancestor lookup succeeded, requires layers:\n");
+ STRV_FOREACH(k, ancestry)
+ log_info("\t%s", *k);
+
+ strv_free(i->ancestry);
+ i->ancestry = ancestry;
+ i->n_ancestry = n;
+ i->current_ancestry = 0;
+
+ dkr_pull_report_progress(i, DKR_DOWNLOADING);
+
+ r = dkr_pull_pull_layer(i);
+ if (r < 0)
+ goto finish;
+
+ } else if (i->layer_job == j) {
+ assert(i->temp_path);
+ assert(i->final_path);
+
+ j->disk_fd = safe_close(j->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;
+ }
+
+ r = aufs_resolve(i->temp_path);
+ if (r < 0) {
+ log_error_errno(r, "Failed to resolve aufs whiteouts: %m");
+ goto finish;
+ }
+
+ r = btrfs_subvol_set_read_only(i->temp_path, true);
+ if (r < 0) {
+ log_error_errno(r, "Failed to mark snapshot read-only: %m");
+ goto finish;
+ }
+
+ if (rename(i->temp_path, i->final_path) < 0) {
+ log_error_errno(errno, "Failed to rename snaphsot: %m");
+ goto finish;
+ }
+
+ log_info("Completed writing to layer %s.", i->final_path);
+
+ i->layer_job = pull_job_unref(i->layer_job);
+ free(i->temp_path);
+ i->temp_path = NULL;
+ free(i->final_path);
+ i->final_path = NULL;
+
+ i->current_ancestry ++;
+ r = dkr_pull_pull_layer(i);
+ if (r < 0)
+ goto finish;
+
+ } else if (i->json_job != j)
+ assert_not_reached("Got finished event for unknown curl object");
+
+ if (!dkr_pull_is_done(i))
+ return;
+
+ dkr_pull_report_progress(i, DKR_COPYING);
+
+ r = dkr_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 dkr_pull_job_on_header(PullJob *j, const char *header, size_t sz) {
+ _cleanup_free_ char *registry = NULL;
+ char *token;
+ DkrPull *i;
+ int r;
+
+ assert(j);
+ assert(j->userdata);
+
+ i = j->userdata;
+
+ r = curl_header_strdup(header, sz, HEADER_TOKEN, &token);
+ if (r < 0)
+ return log_oom();
+ if (r > 0) {
+ free(i->response_token);
+ i->response_token = token;
+ return 0;
+ }
+
+ r = curl_header_strdup(header, sz, HEADER_REGISTRY, &registry);
+ if (r < 0)
+ return log_oom();
+ if (r > 0) {
+ char **l, **k;
+
+ l = strv_split(registry, ",");
+ if (!l)
+ return log_oom();
+
+ STRV_FOREACH(k, l) {
+ if (!hostname_is_valid(*k)) {
+ log_error("Registry hostname is not valid.");
+ strv_free(l);
+ return -EBADMSG;
+ }
+ }
+
+ strv_free(i->response_registries);
+ i->response_registries = l;
+ }
+
+ return 0;
+}
+
+int dkr_pull_start(DkrPull *i, const char *name, const char *tag, const char *local, bool force_local) {
+ const char *url;
+ int r;
+
+ assert(i);
+
+ if (!dkr_name_is_valid(name))
+ return -EINVAL;
+
+ if (tag && !dkr_tag_is_valid(tag))
+ return -EINVAL;
+
+ if (local && !machine_name_is_valid(local))
+ return -EINVAL;
+
+ if (i->images_job)
+ return -EBUSY;
+
+ if (!tag)
+ tag = "latest";
+
+ r = free_and_strdup(&i->local, local);
+ if (r < 0)
+ return r;
+ i->force_local = force_local;
+
+ r = free_and_strdup(&i->name, name);
+ if (r < 0)
+ return r;
+ r = free_and_strdup(&i->tag, tag);
+ if (r < 0)
+ return r;
+
+ url = strjoina(i->index_url, "/v1/repositories/", name, "/images");
+
+ r = pull_job_new(&i->images_job, url, i->glue, i);
+ if (r < 0)
+ return r;
+
+ r = dkr_pull_add_token(i, i->images_job);
+ if (r < 0)
+ return r;
+
+ i->images_job->on_finished = dkr_pull_job_on_finished;
+ i->images_job->on_header = dkr_pull_job_on_header;
+ i->images_job->on_progress = dkr_pull_job_on_progress;
+
+ return pull_job_begin(i->images_job);
+}