[thirdparty/systemd.git] / src / import / pull-tar.c

/* SPDX-License-Identifier: LGPL-2.1-or-later */

#include <dirent.h>

#include "sd-daemon.h"
#include "sd-event.h"

#include "alloc-util.h"
#include "btrfs-util.h"
#include "copy.h"
#include "curl-util.h"
#include "errno-util.h"
#include "fs-util.h"
#include "import-common.h"
#include "import-util.h"
#include "install-file.h"
#include "log.h"
#include "mkdir-label.h"
#include "path-util.h"
#include "process-util.h"
#include "pull-common.h"
#include "pull-job.h"
#include "pull-tar.h"
#include "rm-rf.h"
#include "string-util.h"
#include "tmpfile-util.h"
#include "web-util.h"

typedef enum TarProgress {
        TAR_DOWNLOADING,
        TAR_VERIFYING,
        TAR_FINALIZING,
        TAR_COPYING,
} TarProgress;

typedef struct TarPull {
        sd_event *event;
        CurlGlue *glue;

        ImportFlags flags;
        ImportVerify verify;
        char *image_root;

        PullJob *tar_job;
        PullJob *checksum_job;
        PullJob *signature_job;
        PullJob *settings_job;

        TarPullFinished on_finished;
        void *userdata;

        char *local;

        pid_t tar_pid;

        char *final_path;
        char *temp_path;

        char *settings_path;
        char *settings_temp_path;

        char *checksum;
} TarPull;

TarPull* tar_pull_unref(TarPull *i) {
        if (!i)
                return NULL;

        if (i->tar_pid > 1)
                sigkill_wait(i->tar_pid);

        pull_job_unref(i->tar_job);
        pull_job_unref(i->checksum_job);
        pull_job_unref(i->signature_job);
        pull_job_unref(i->settings_job);

        curl_glue_unref(i->glue);
        sd_event_unref(i->event);

        rm_rf_subvolume_and_free(i->temp_path);
        unlink_and_free(i->settings_temp_path);

        free(i->final_path);
        free(i->settings_path);
        free(i->image_root);
        free(i->local);
        free(i->checksum);

        return mfree(i);
}

int tar_pull_new(
                TarPull **ret,
                sd_event *event,
                const char *image_root,
                TarPullFinished on_finished,
                void *userdata) {

        _cleanup_(curl_glue_unrefp) CurlGlue *g = NULL;
        _cleanup_(sd_event_unrefp) sd_event *e = NULL;
        _cleanup_(tar_pull_unrefp) TarPull *i = NULL;
        _cleanup_free_ char *root = NULL;
        int r;

        assert(image_root);
        assert(ret);

        root = strdup(image_root);
        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(TarPull, 1);
        if (!i)
                return -ENOMEM;

        *i = (TarPull) {
                .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 tar_pull_report_progress(TarPull *i, TarProgress p) {
        unsigned percent;

        assert(i);

        switch (p) {

        case TAR_DOWNLOADING: {
                unsigned remain = 85;

                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->settings_job) {
                        percent += i->settings_job->progress_percent * 5 / 100;
                        remain -= 5;
                }

                if (i->tar_job)
                        percent += i->tar_job->progress_percent * remain / 100;
                break;
        }

        case TAR_VERIFYING:
                percent = 85;
                break;

        case TAR_FINALIZING:
                percent = 90;
                break;

        case TAR_COPYING:
                percent = 95;
                break;

        default:
                assert_not_reached();
        }

        sd_notifyf(false, "X_IMPORT_PROGRESS=%u%%", percent);
        log_debug("Combined progress %u%%", percent);
}

static int tar_pull_determine_path(
                TarPull *i,
                const char *suffix,
                char **field /* input + output (!) */) {
        int r;

        assert(i);
        assert(field);

        if (*field)
                return 0;

        assert(i->tar_job);

        r = pull_make_path(i->tar_job->url, i->tar_job->etag, i->image_root, ".tar-", suffix, field);
        if (r < 0)
                return log_oom();

        return 1;
}

static int tar_pull_make_local_copy(TarPull *i) {
        _cleanup_(rm_rf_subvolume_and_freep) char *t = NULL;
        _cleanup_free_ char *p = NULL;
        const char *source;
        int r;

        assert(i);
        assert(i->tar_job);

        if (!i->local)
                return 0;

        assert(i->final_path);

        p = path_join(i->image_root, i->local);
        if (!p)
                return log_oom();

        if (FLAGS_SET(i->flags, IMPORT_PULL_KEEP_DOWNLOAD)) {
                r = tempfn_random(p, NULL, &t);
                if (r < 0)
                        return log_error_errno(r, "Failed to generate temporary filename for %s: %m", p);

                if (i->flags & IMPORT_BTRFS_SUBVOL)
                        r = btrfs_subvol_snapshot_at(
                                        AT_FDCWD, i->final_path,
                                        AT_FDCWD, t,
                                        (i->flags & IMPORT_BTRFS_QUOTA ? BTRFS_SNAPSHOT_QUOTA : 0)|
                                        BTRFS_SNAPSHOT_FALLBACK_COPY|
                                        BTRFS_SNAPSHOT_FALLBACK_DIRECTORY|
                                        BTRFS_SNAPSHOT_RECURSIVE);
                else
                        r = copy_tree(i->final_path, t, UID_INVALID, GID_INVALID, COPY_REFLINK|COPY_HARDLINKS, NULL, NULL);
                if (r < 0)
                        return log_error_errno(r, "Failed to create local image: %m");

                source = t;
        } else
                source = i->final_path;

        r = install_file(AT_FDCWD, source,
                         AT_FDCWD, p,
                         (i->flags & IMPORT_FORCE ? INSTALL_REPLACE : 0) |
                         (i->flags & IMPORT_READ_ONLY ? INSTALL_READ_ONLY : 0) |
                         (i->flags & IMPORT_SYNC ? INSTALL_SYNCFS : 0));
        if (r < 0)
                return log_error_errno(r, "Failed to install local image '%s': %m", p);

        t = mfree(t);

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

        if (FLAGS_SET(i->flags, IMPORT_PULL_SETTINGS)) {
                _cleanup_free_ char *local_settings = NULL;
                assert(i->settings_job);

                r = tar_pull_determine_path(i, ".nspawn", &i->settings_path);
                if (r < 0)
                        return r;

                local_settings = strjoin(i->image_root, "/", i->local, ".nspawn");
                if (!local_settings)
                        return log_oom();

                if (FLAGS_SET(i->flags, IMPORT_PULL_KEEP_DOWNLOAD))
                        r = copy_file_atomic(
                                        i->settings_path,
                                        local_settings,
                                        0664,
                                        COPY_REFLINK |
                                        (FLAGS_SET(i->flags, IMPORT_FORCE) ? COPY_REPLACE : 0) |
                                        (FLAGS_SET(i->flags, IMPORT_SYNC) ? COPY_FSYNC_FULL : 0));
                else
                        r = install_file(AT_FDCWD, i->settings_path,
                                         AT_FDCWD, local_settings,
                                         (i->flags & IMPORT_FORCE ? INSTALL_REPLACE : 0) |
                                         (i->flags & IMPORT_SYNC ? INSTALL_SYNCFS : 0));
                if (r == -EEXIST)
                        log_warning_errno(r, "Settings file %s already exists, not replacing.", local_settings);
                else if (r == -ENOENT)
                        log_debug_errno(r, "Skipping creation of settings file, since none was found.");
                else if (r < 0)
                        log_warning_errno(r, "Failed to install settings files %s, ignoring: %m", local_settings);
                else
                        log_info("Created new settings file %s.", local_settings);
        }

        return 0;
}

static bool tar_pull_is_done(TarPull *i) {
        assert(i);
        assert(i->tar_job);

        if (!PULL_JOB_IS_COMPLETE(i->tar_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;
        if (i->settings_job && !PULL_JOB_IS_COMPLETE(i->settings_job))
                return false;

        return true;
}

static void tar_pull_job_on_finished(PullJob *j) {
        TarPull *i;
        int r;

        assert(j);
        assert(j->userdata);

        i = j->userdata;

        if (j->error != 0) {
                if (j == i->tar_job) {
                        if (j->error == ENOMEDIUM) /* HTTP 404 */
                                r = log_error_errno(j->error, "Failed to retrieve image file. (Wrong URL?)");
                        else
                                r = log_error_errno(j->error, "Failed to retrieve image file.");
                        goto finish;
                } else if (j == i->checksum_job) {
                        r = log_error_errno(j->error, "Failed to retrieve SHA256 checksum, cannot verify. (Try --verify=no?)");
                        goto finish;
                } else if (j == i->signature_job)
                        log_debug_errno(j->error, "Signature job for %s failed, proceeding for now.", j->url);
                else if (j == i->settings_job)
                        log_info_errno(j->error, "Settings file could not be retrieved, proceeding without.");
                else
                        assert("unexpected job");
        }

        /* This is invoked if either the download completed successfully, or the download was skipped because
         * we already have the etag. */

        if (!tar_pull_is_done(i))
                return;

        if (i->signature_job && i->signature_job->error != 0) {
                VerificationStyle style;

                assert(i->checksum_job);

                r = verification_style_from_url(i->checksum_job->url, &style);
                if (r < 0) {
                        log_error_errno(r, "Failed to determine verification style from checksum URL: %m");
                        goto finish;
                }

                if (style == VERIFICATION_PER_DIRECTORY) { /* A failed signature file download only matters
                                                            * in per-directory verification mode, since only
                                                            * then the signature is detached, and thus a file
                                                            * of its own. */
                        r = log_error_errno(i->signature_job->error,
                                            "Failed to retrieve signature file, cannot verify. (Try --verify=no?)");
                        goto finish;
                }
        }

        pull_job_close_disk_fd(i->tar_job);
        pull_job_close_disk_fd(i->settings_job);

        if (i->tar_pid > 0) {
                r = wait_for_terminate_and_check("tar", TAKE_PID(i->tar_pid), WAIT_LOG);
                if (r < 0)
                        goto finish;
                if (r != EXIT_SUCCESS) {
                        r = -EIO;
                        goto finish;
                }
        }

        if (!i->tar_job->etag_exists) {
                /* This is a new download, verify it, and move it into place */

                tar_pull_report_progress(i, TAR_VERIFYING);

                r = pull_verify(i->verify,
                                i->checksum,
                                i->tar_job,
                                i->checksum_job,
                                i->signature_job,
                                i->settings_job,
                                /* roothash_job = */ NULL,
                                /* roothash_signature_job = */ NULL,
                                /* verity_job = */ NULL);
                if (r < 0)
                        goto finish;
        }

        if (i->flags & IMPORT_DIRECT) {
                assert(!i->settings_job);
                assert(i->local);
                assert(!i->temp_path);

                tar_pull_report_progress(i, TAR_FINALIZING);

                r = import_mangle_os_tree(i->local);
                if (r < 0)
                        goto finish;

                r = install_file(
                                AT_FDCWD, i->local,
                                AT_FDCWD, NULL,
                                (i->flags & IMPORT_READ_ONLY ? INSTALL_READ_ONLY : 0) |
                                (i->flags & IMPORT_SYNC ? INSTALL_SYNCFS : 0));
                if (r < 0) {
                        log_error_errno(r, "Failed to finalize '%s': %m", i->local);
                        goto finish;
                }
        } else {
                r = tar_pull_determine_path(i, NULL, &i->final_path);
                if (r < 0)
                        goto finish;

                if (!i->tar_job->etag_exists) {
                        /* This is a new download, verify it, and move it into place */

                        assert(i->temp_path);
                        assert(i->final_path);

                        tar_pull_report_progress(i, TAR_FINALIZING);

                        r = import_mangle_os_tree(i->temp_path);
                        if (r < 0)
                                goto finish;

                        r = install_file(
                                        AT_FDCWD, i->temp_path,
                                        AT_FDCWD, i->final_path,
                                        (i->flags & IMPORT_PULL_KEEP_DOWNLOAD ? INSTALL_READ_ONLY : 0) |
                                        (i->flags & IMPORT_SYNC ? INSTALL_SYNCFS : 0));
                        if (r < 0) {
                                log_error_errno(r, "Failed to rename to final image name to %s: %m", i->final_path);
                                goto finish;
                        }

                        i->temp_path = mfree(i->temp_path);

                        if (i->settings_job &&
                            i->settings_job->error == 0) {

                                /* Also move the settings file into place, if it exists. Note that we do so only if we also
                                 * moved the tar file in place, to keep things strictly in sync. */
                                assert(i->settings_temp_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 */
                                i->settings_path = mfree(i->settings_path);

                                r = tar_pull_determine_path(i, ".nspawn", &i->settings_path);
                                if (r < 0)
                                        goto finish;

                                r = install_file(
                                                AT_FDCWD, i->settings_temp_path,
                                                AT_FDCWD, i->settings_path,
                                                INSTALL_READ_ONLY|
                                                (i->flags & IMPORT_SYNC ? INSTALL_FSYNC_FULL : 0));
                                if (r < 0) {
                                        log_error_errno(r, "Failed to rename settings file to %s: %m", i->settings_path);
                                        goto finish;
                                }

                                i->settings_temp_path = mfree(i->settings_temp_path);
                        }
                }

                tar_pull_report_progress(i, TAR_COPYING);

                r = tar_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 tar_pull_job_on_open_disk_tar(PullJob *j) {
        const char *where;
        TarPull *i;
        int r;

        assert(j);
        assert(j->userdata);

        i = j->userdata;
        assert(i->tar_job == j);
        assert(i->tar_pid <= 0);

        if (i->flags & IMPORT_DIRECT)
                where = i->local;
        else {
                if (!i->temp_path) {
                        r = tempfn_random_child(i->image_root, "tar", &i->temp_path);
                        if (r < 0)
                                return log_oom();
                }

                where = i->temp_path;
        }

        (void) mkdir_parents_label(where, 0700);

        if (FLAGS_SET(i->flags, IMPORT_DIRECT|IMPORT_FORCE))
                (void) rm_rf(where, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME);

        if (i->flags & IMPORT_BTRFS_SUBVOL)
                r = btrfs_subvol_make_fallback(AT_FDCWD, where, 0755);
        else
                r = RET_NERRNO(mkdir(where, 0755));
        if (r == -EEXIST && (i->flags & IMPORT_DIRECT)) /* EEXIST is OK if in direct mode, but not otherwise,
                                                       * because in that case our temporary path collided */
                r = 0;
        if (r < 0)
                return log_error_errno(r, "Failed to create directory/subvolume %s: %m", where);
        if (r > 0 && (i->flags & IMPORT_BTRFS_QUOTA)) { /* actually btrfs subvol */
                if (!(i->flags & IMPORT_DIRECT))
                        (void) import_assign_pool_quota_and_warn(i->image_root);
                (void) import_assign_pool_quota_and_warn(where);
        }

        j->disk_fd = import_fork_tar_x(where, &i->tar_pid);
        if (j->disk_fd < 0)
                return j->disk_fd;

        return 0;
}

static int tar_pull_job_on_open_disk_settings(PullJob *j) {
        TarPull *i;
        int r;

        assert(j);
        assert(j->userdata);

        i = j->userdata;
        assert(i->settings_job == j);

        if (!i->settings_temp_path) {
                r = tempfn_random_child(i->image_root, "settings", &i->settings_temp_path);
                if (r < 0)
                        return log_oom();
        }

        (void) 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 tar_pull_job_on_progress(PullJob *j) {
        TarPull *i;

        assert(j);
        assert(j->userdata);

        i = j->userdata;

        tar_pull_report_progress(i, TAR_DOWNLOADING);
}

int tar_pull_start(
                TarPull *i,
                const char *url,
                const char *local,
                ImportFlags flags,
                ImportVerify verify,
                const char *checksum) {

        int r;

        assert(i);
        assert(verify == _IMPORT_VERIFY_INVALID || verify < _IMPORT_VERIFY_MAX);
        assert(verify == _IMPORT_VERIFY_INVALID || verify >= 0);
        assert((verify < 0) || !checksum);
        assert(!(flags & ~IMPORT_PULL_FLAGS_MASK_TAR));
        assert(!(flags & IMPORT_PULL_SETTINGS) || !(flags & IMPORT_DIRECT));
        assert(!(flags & IMPORT_PULL_SETTINGS) || !checksum);

        if (!http_url_is_valid(url) && !file_url_is_valid(url))
                return -EINVAL;

        if (local && !pull_validate_local(local, flags))
                return -EINVAL;

        if (i->tar_job)
                return -EBUSY;

        r = free_and_strdup(&i->local, local);
        if (r < 0)
                return r;

        r = free_and_strdup(&i->checksum, checksum);
        if (r < 0)
                return r;

        i->flags = flags;
        i->verify = verify;

        /* Set up download job for TAR file */
        r = pull_job_new(&i->tar_job, url, i->glue, i);
        if (r < 0)
                return r;

        i->tar_job->on_finished = tar_pull_job_on_finished;
        i->tar_job->on_open_disk = tar_pull_job_on_open_disk_tar;
        i->tar_job->calc_checksum = checksum || IN_SET(verify, IMPORT_VERIFY_CHECKSUM, IMPORT_VERIFY_SIGNATURE);

        if (!FLAGS_SET(flags, IMPORT_DIRECT)) {
                r = pull_find_old_etags(url, i->image_root, DT_DIR, ".tar-", NULL, &i->tar_job->old_etags);
                if (r < 0)
                        return r;
        }

        /* Set up download of checksum/signature files */
        r = pull_make_verification_jobs(
                        &i->checksum_job,
                        &i->signature_job,
                        verify,
                        checksum,
                        url,
                        i->glue,
                        tar_pull_job_on_finished,
                        i);
        if (r < 0)
                return r;

        /* Set up download job for the settings file (.nspawn) */
        if (FLAGS_SET(flags, IMPORT_PULL_SETTINGS)) {
                r = pull_make_auxiliary_job(
                                &i->settings_job,
                                url,
                                tar_strip_suffixes,
                                ".nspawn",
                                verify,
                                i->glue,
                                tar_pull_job_on_open_disk_settings,
                                tar_pull_job_on_finished,
                                i);
                if (r < 0)
                        return r;
        }

        PullJob *j;
        FOREACH_ARGUMENT(j,
                         i->tar_job,
                         i->checksum_job,
                         i->signature_job,
                         i->settings_job) {

                if (!j)
                        continue;

                j->on_progress = tar_pull_job_on_progress;
                j->sync = FLAGS_SET(flags, IMPORT_SYNC);

                r = pull_job_begin(j);
                if (r < 0)
                        return r;
        }

        return 0;
}
Commit	Line	Data
	1	/* SPDX-License-Identifier: LGPL-2.1-or-later */
	2
	3	#include <dirent.h>
	4
	5	#include "sd-daemon.h"
	6	#include "sd-event.h"
	7
	8	#include "alloc-util.h"
	9	#include "btrfs-util.h"
	10	#include "copy.h"
	11	#include "curl-util.h"
	12	#include "errno-util.h"
	13	#include "fs-util.h"
	14	#include "import-common.h"
	15	#include "import-util.h"
	16	#include "install-file.h"
	17	#include "log.h"
	18	#include "mkdir-label.h"
	19	#include "path-util.h"
	20	#include "process-util.h"
	21	#include "pull-common.h"
	22	#include "pull-job.h"
	23	#include "pull-tar.h"
	24	#include "rm-rf.h"
	25	#include "string-util.h"
	26	#include "tmpfile-util.h"
	27	#include "web-util.h"
	28
	29	typedef enum TarProgress {
	30	TAR_DOWNLOADING,
	31	TAR_VERIFYING,
	32	TAR_FINALIZING,
	33	TAR_COPYING,
	34	} TarProgress;
	35
	36	typedef struct TarPull {
	37	sd_event *event;
	38	CurlGlue *glue;
	39
	40	ImportFlags flags;
	41	ImportVerify verify;
	42	char *image_root;
	43
	44	PullJob *tar_job;
	45	PullJob *checksum_job;
	46	PullJob *signature_job;
	47	PullJob *settings_job;
	48
	49	TarPullFinished on_finished;
	50	void *userdata;
	51
	52	char *local;
	53
	54	pid_t tar_pid;
	55
	56	char *final_path;
	57	char *temp_path;
	58
	59	char *settings_path;
	60	char *settings_temp_path;
	61
	62	char *checksum;
	63	} TarPull;
	64
	65	TarPull* tar_pull_unref(TarPull *i) {
	66	if (!i)
	67	return NULL;
	68
	69	if (i->tar_pid > 1)
	70	sigkill_wait(i->tar_pid);
	71
	72	pull_job_unref(i->tar_job);
	73	pull_job_unref(i->checksum_job);
	74	pull_job_unref(i->signature_job);
	75	pull_job_unref(i->settings_job);
	76
	77	curl_glue_unref(i->glue);
	78	sd_event_unref(i->event);
	79
	80	rm_rf_subvolume_and_free(i->temp_path);
	81	unlink_and_free(i->settings_temp_path);
	82
	83	free(i->final_path);
	84	free(i->settings_path);
	85	free(i->image_root);
	86	free(i->local);
	87	free(i->checksum);
	88
	89	return mfree(i);
	90	}
	91
	92	int tar_pull_new(
	93	TarPull **ret,
	94	sd_event *event,
	95	const char *image_root,
	96	TarPullFinished on_finished,
	97	void *userdata) {
	98
	99	_cleanup_(curl_glue_unrefp) CurlGlue *g = NULL;
	100	_cleanup_(sd_event_unrefp) sd_event *e = NULL;
	101	_cleanup_(tar_pull_unrefp) TarPull *i = NULL;
	102	_cleanup_free_ char *root = NULL;
	103	int r;
	104
	105	assert(image_root);
	106	assert(ret);
	107
	108	root = strdup(image_root);
	109	if (!root)
	110	return -ENOMEM;
	111
	112	if (event)
	113	e = sd_event_ref(event);
	114	else {
	115	r = sd_event_default(&e);
	116	if (r < 0)
	117	return r;
	118	}
	119
	120	r = curl_glue_new(&g, e);
	121	if (r < 0)
	122	return r;
	123
	124	i = new(TarPull, 1);
	125	if (!i)
	126	return -ENOMEM;
	127
	128	*i = (TarPull) {
	129	.on_finished = on_finished,
	130	.userdata = userdata,
	131	.image_root = TAKE_PTR(root),
	132	.event = TAKE_PTR(e),
	133	.glue = TAKE_PTR(g),
	134	};
	135
	136	i->glue->on_finished = pull_job_curl_on_finished;
	137	i->glue->userdata = i;
	138
	139	*ret = TAKE_PTR(i);
	140
	141	return 0;
	142	}
	143
	144	static void tar_pull_report_progress(TarPull *i, TarProgress p) {
	145	unsigned percent;
	146
	147	assert(i);
	148
	149	switch (p) {
	150
	151	case TAR_DOWNLOADING: {
	152	unsigned remain = 85;
	153
	154	percent = 0;
	155
	156	if (i->checksum_job) {
	157	percent += i->checksum_job->progress_percent * 5 / 100;
	158	remain -= 5;
	159	}
	160
	161	if (i->signature_job) {
	162	percent += i->signature_job->progress_percent * 5 / 100;
	163	remain -= 5;
	164	}
	165
	166	if (i->settings_job) {
	167	percent += i->settings_job->progress_percent * 5 / 100;
	168	remain -= 5;
	169	}
	170
	171	if (i->tar_job)
	172	percent += i->tar_job->progress_percent * remain / 100;
	173	break;
	174	}
	175
	176	case TAR_VERIFYING:
	177	percent = 85;
	178	break;
	179
	180	case TAR_FINALIZING:
	181	percent = 90;
	182	break;
	183
	184	case TAR_COPYING:
	185	percent = 95;
	186	break;
	187
	188	default:
	189	assert_not_reached();
	190	}
	191
	192	sd_notifyf(false, "X_IMPORT_PROGRESS=%u%%", percent);
	193	log_debug("Combined progress %u%%", percent);
	194	}
	195
	196	static int tar_pull_determine_path(
	197	TarPull *i,
	198	const char *suffix,
	199	char *field / input + output (!) */) {
	200	int r;
	201
	202	assert(i);
	203	assert(field);
	204
	205	if (*field)
	206	return 0;
	207
	208	assert(i->tar_job);
	209
	210	r = pull_make_path(i->tar_job->url, i->tar_job->etag, i->image_root, ".tar-", suffix, field);
	211	if (r < 0)
	212	return log_oom();
	213
	214	return 1;
	215	}
	216
	217	static int tar_pull_make_local_copy(TarPull *i) {
	218	_cleanup_(rm_rf_subvolume_and_freep) char *t = NULL;
	219	_cleanup_free_ char *p = NULL;
	220	const char *source;
	221	int r;
	222
	223	assert(i);
	224	assert(i->tar_job);
	225
	226	if (!i->local)
	227	return 0;
	228
	229	assert(i->final_path);
	230
	231	p = path_join(i->image_root, i->local);
	232	if (!p)
	233	return log_oom();
	234
	235	if (FLAGS_SET(i->flags, IMPORT_PULL_KEEP_DOWNLOAD)) {
	236	r = tempfn_random(p, NULL, &t);
	237	if (r < 0)
	238	return log_error_errno(r, "Failed to generate temporary filename for %s: %m", p);
	239
	240	if (i->flags & IMPORT_BTRFS_SUBVOL)
	241	r = btrfs_subvol_snapshot_at(
	242	AT_FDCWD, i->final_path,
	243	AT_FDCWD, t,
	244	(i->flags & IMPORT_BTRFS_QUOTA ? BTRFS_SNAPSHOT_QUOTA : 0)\|
	245	BTRFS_SNAPSHOT_FALLBACK_COPY\|
	246	BTRFS_SNAPSHOT_FALLBACK_DIRECTORY\|
	247	BTRFS_SNAPSHOT_RECURSIVE);
	248	else
	249	r = copy_tree(i->final_path, t, UID_INVALID, GID_INVALID, COPY_REFLINK\|COPY_HARDLINKS, NULL, NULL);
	250	if (r < 0)
	251	return log_error_errno(r, "Failed to create local image: %m");
	252
	253	source = t;
	254	} else
	255	source = i->final_path;
	256
	257	r = install_file(AT_FDCWD, source,
	258	AT_FDCWD, p,
	259	(i->flags & IMPORT_FORCE ? INSTALL_REPLACE : 0) \|
	260	(i->flags & IMPORT_READ_ONLY ? INSTALL_READ_ONLY : 0) \|
	261	(i->flags & IMPORT_SYNC ? INSTALL_SYNCFS : 0));
	262	if (r < 0)
	263	return log_error_errno(r, "Failed to install local image '%s': %m", p);
	264
	265	t = mfree(t);
	266
	267	log_info("Created new local image '%s'.", i->local);
	268
	269	if (FLAGS_SET(i->flags, IMPORT_PULL_SETTINGS)) {
	270	_cleanup_free_ char *local_settings = NULL;
	271	assert(i->settings_job);
	272
	273	r = tar_pull_determine_path(i, ".nspawn", &i->settings_path);
	274	if (r < 0)
	275	return r;
	276
	277	local_settings = strjoin(i->image_root, "/", i->local, ".nspawn");
	278	if (!local_settings)
	279	return log_oom();
	280
	281	if (FLAGS_SET(i->flags, IMPORT_PULL_KEEP_DOWNLOAD))
	282	r = copy_file_atomic(
	283	i->settings_path,
	284	local_settings,
	285	0664,
	286	COPY_REFLINK \|
	287	(FLAGS_SET(i->flags, IMPORT_FORCE) ? COPY_REPLACE : 0) \|
	288	(FLAGS_SET(i->flags, IMPORT_SYNC) ? COPY_FSYNC_FULL : 0));
	289	else
	290	r = install_file(AT_FDCWD, i->settings_path,
	291	AT_FDCWD, local_settings,
	292	(i->flags & IMPORT_FORCE ? INSTALL_REPLACE : 0) \|
	293	(i->flags & IMPORT_SYNC ? INSTALL_SYNCFS : 0));
	294	if (r == -EEXIST)
	295	log_warning_errno(r, "Settings file %s already exists, not replacing.", local_settings);
	296	else if (r == -ENOENT)
	297	log_debug_errno(r, "Skipping creation of settings file, since none was found.");
	298	else if (r < 0)
	299	log_warning_errno(r, "Failed to install settings files %s, ignoring: %m", local_settings);
	300	else
	301	log_info("Created new settings file %s.", local_settings);
	302	}
	303
	304	return 0;
	305	}
	306
	307	static bool tar_pull_is_done(TarPull *i) {
	308	assert(i);
	309	assert(i->tar_job);
	310
	311	if (!PULL_JOB_IS_COMPLETE(i->tar_job))
	312	return false;
	313	if (i->checksum_job && !PULL_JOB_IS_COMPLETE(i->checksum_job))
	314	return false;
	315	if (i->signature_job && !PULL_JOB_IS_COMPLETE(i->signature_job))
	316	return false;
	317	if (i->settings_job && !PULL_JOB_IS_COMPLETE(i->settings_job))
	318	return false;
	319
	320	return true;
	321	}
	322
	323	static void tar_pull_job_on_finished(PullJob *j) {
	324	TarPull *i;
	325	int r;
	326
	327	assert(j);
	328	assert(j->userdata);
	329
	330	i = j->userdata;
	331
	332	if (j->error != 0) {
	333	if (j == i->tar_job) {
	334	if (j->error == ENOMEDIUM) /* HTTP 404 */
	335	r = log_error_errno(j->error, "Failed to retrieve image file. (Wrong URL?)");
	336	else
	337	r = log_error_errno(j->error, "Failed to retrieve image file.");
	338	goto finish;
	339	} else if (j == i->checksum_job) {
	340	r = log_error_errno(j->error, "Failed to retrieve SHA256 checksum, cannot verify. (Try --verify=no?)");
	341	goto finish;
	342	} else if (j == i->signature_job)
	343	log_debug_errno(j->error, "Signature job for %s failed, proceeding for now.", j->url);
	344	else if (j == i->settings_job)
	345	log_info_errno(j->error, "Settings file could not be retrieved, proceeding without.");
	346	else
	347	assert("unexpected job");
	348	}
	349
	350	/* This is invoked if either the download completed successfully, or the download was skipped because
	351	* we already have the etag. */
	352
	353	if (!tar_pull_is_done(i))
	354	return;
	355
	356	if (i->signature_job && i->signature_job->error != 0) {
	357	VerificationStyle style;
	358
	359	assert(i->checksum_job);
	360
	361	r = verification_style_from_url(i->checksum_job->url, &style);
	362	if (r < 0) {
	363	log_error_errno(r, "Failed to determine verification style from checksum URL: %m");
	364	goto finish;
	365	}
	366
	367	if (style == VERIFICATION_PER_DIRECTORY) { /* A failed signature file download only matters
	368	* in per-directory verification mode, since only
	369	* then the signature is detached, and thus a file
	370	* of its own. */
	371	r = log_error_errno(i->signature_job->error,
	372	"Failed to retrieve signature file, cannot verify. (Try --verify=no?)");
	373	goto finish;
	374	}
	375	}
	376
	377	pull_job_close_disk_fd(i->tar_job);
	378	pull_job_close_disk_fd(i->settings_job);
	379
	380	if (i->tar_pid > 0) {
	381	r = wait_for_terminate_and_check("tar", TAKE_PID(i->tar_pid), WAIT_LOG);
	382	if (r < 0)
	383	goto finish;
	384	if (r != EXIT_SUCCESS) {
	385	r = -EIO;
	386	goto finish;
	387	}
	388	}
	389
	390	if (!i->tar_job->etag_exists) {
	391	/* This is a new download, verify it, and move it into place */
	392
	393	tar_pull_report_progress(i, TAR_VERIFYING);
	394
	395	r = pull_verify(i->verify,
	396	i->checksum,
	397	i->tar_job,
	398	i->checksum_job,
	399	i->signature_job,
	400	i->settings_job,
	401	/* roothash_job = */ NULL,
	402	/* roothash_signature_job = */ NULL,
	403	/* verity_job = */ NULL);
	404	if (r < 0)
	405	goto finish;
	406	}
	407
	408	if (i->flags & IMPORT_DIRECT) {
	409	assert(!i->settings_job);
	410	assert(i->local);
	411	assert(!i->temp_path);
	412
	413	tar_pull_report_progress(i, TAR_FINALIZING);
	414
	415	r = import_mangle_os_tree(i->local);
	416	if (r < 0)
	417	goto finish;
	418
	419	r = install_file(
	420	AT_FDCWD, i->local,
	421	AT_FDCWD, NULL,
	422	(i->flags & IMPORT_READ_ONLY ? INSTALL_READ_ONLY : 0) \|
	423	(i->flags & IMPORT_SYNC ? INSTALL_SYNCFS : 0));
	424	if (r < 0) {
	425	log_error_errno(r, "Failed to finalize '%s': %m", i->local);
	426	goto finish;
	427	}
	428	} else {
	429	r = tar_pull_determine_path(i, NULL, &i->final_path);
	430	if (r < 0)
	431	goto finish;
	432
	433	if (!i->tar_job->etag_exists) {
	434	/* This is a new download, verify it, and move it into place */
	435
	436	assert(i->temp_path);
	437	assert(i->final_path);
	438
	439	tar_pull_report_progress(i, TAR_FINALIZING);
	440
	441	r = import_mangle_os_tree(i->temp_path);
	442	if (r < 0)
	443	goto finish;
	444
	445	r = install_file(
	446	AT_FDCWD, i->temp_path,
	447	AT_FDCWD, i->final_path,
	448	(i->flags & IMPORT_PULL_KEEP_DOWNLOAD ? INSTALL_READ_ONLY : 0) \|
	449	(i->flags & IMPORT_SYNC ? INSTALL_SYNCFS : 0));
	450	if (r < 0) {
	451	log_error_errno(r, "Failed to rename to final image name to %s: %m", i->final_path);
	452	goto finish;
	453	}
	454
	455	i->temp_path = mfree(i->temp_path);
	456
	457	if (i->settings_job &&
	458	i->settings_job->error == 0) {
	459
	460	/* Also move the settings file into place, if it exists. Note that we do so only if we also
	461	* moved the tar file in place, to keep things strictly in sync. */
	462	assert(i->settings_temp_path);
	463
	464	/* Regenerate final name for this auxiliary file, we might know the etag of the file now, and
	465	* we should incorporate it in the file name if we can */
	466	i->settings_path = mfree(i->settings_path);
	467
	468	r = tar_pull_determine_path(i, ".nspawn", &i->settings_path);
	469	if (r < 0)
	470	goto finish;
	471
	472	r = install_file(
	473	AT_FDCWD, i->settings_temp_path,
	474	AT_FDCWD, i->settings_path,
	475	INSTALL_READ_ONLY\|
	476	(i->flags & IMPORT_SYNC ? INSTALL_FSYNC_FULL : 0));
	477	if (r < 0) {
	478	log_error_errno(r, "Failed to rename settings file to %s: %m", i->settings_path);
	479	goto finish;
	480	}
	481
	482	i->settings_temp_path = mfree(i->settings_temp_path);
	483	}
	484	}
	485
	486	tar_pull_report_progress(i, TAR_COPYING);
	487
	488	r = tar_pull_make_local_copy(i);
	489	if (r < 0)
	490	goto finish;
	491	}
	492
	493	r = 0;
	494
	495	finish:
	496	if (i->on_finished)
	497	i->on_finished(i, r, i->userdata);
	498	else
	499	sd_event_exit(i->event, r);
	500	}
	501
	502	static int tar_pull_job_on_open_disk_tar(PullJob *j) {
	503	const char *where;
	504	TarPull *i;
	505	int r;
	506
	507	assert(j);
	508	assert(j->userdata);
	509
	510	i = j->userdata;
	511	assert(i->tar_job == j);
	512	assert(i->tar_pid <= 0);
	513
	514	if (i->flags & IMPORT_DIRECT)
	515	where = i->local;
	516	else {
	517	if (!i->temp_path) {
	518	r = tempfn_random_child(i->image_root, "tar", &i->temp_path);
	519	if (r < 0)
	520	return log_oom();
	521	}
	522
	523	where = i->temp_path;
	524	}
	525
	526	(void) mkdir_parents_label(where, 0700);
	527
	528	if (FLAGS_SET(i->flags, IMPORT_DIRECT\|IMPORT_FORCE))
	529	(void) rm_rf(where, REMOVE_ROOT\|REMOVE_PHYSICAL\|REMOVE_SUBVOLUME);
	530
	531	if (i->flags & IMPORT_BTRFS_SUBVOL)
	532	r = btrfs_subvol_make_fallback(AT_FDCWD, where, 0755);
	533	else
	534	r = RET_NERRNO(mkdir(where, 0755));
	535	if (r == -EEXIST && (i->flags & IMPORT_DIRECT)) /* EEXIST is OK if in direct mode, but not otherwise,
	536	* because in that case our temporary path collided */
	537	r = 0;
	538	if (r < 0)
	539	return log_error_errno(r, "Failed to create directory/subvolume %s: %m", where);
	540	if (r > 0 && (i->flags & IMPORT_BTRFS_QUOTA)) { /* actually btrfs subvol */
	541	if (!(i->flags & IMPORT_DIRECT))
	542	(void) import_assign_pool_quota_and_warn(i->image_root);
	543	(void) import_assign_pool_quota_and_warn(where);
	544	}
	545
	546	j->disk_fd = import_fork_tar_x(where, &i->tar_pid);
	547	if (j->disk_fd < 0)
	548	return j->disk_fd;
	549
	550	return 0;
	551	}
	552
	553	static int tar_pull_job_on_open_disk_settings(PullJob *j) {
	554	TarPull *i;
	555	int r;
	556
	557	assert(j);
	558	assert(j->userdata);
	559
	560	i = j->userdata;
	561	assert(i->settings_job == j);
	562
	563	if (!i->settings_temp_path) {
	564	r = tempfn_random_child(i->image_root, "settings", &i->settings_temp_path);
	565	if (r < 0)
	566	return log_oom();
	567	}
	568
	569	(void) mkdir_parents_label(i->settings_temp_path, 0700);
	570
	571	j->disk_fd = open(i->settings_temp_path, O_RDWR\|O_CREAT\|O_EXCL\|O_NOCTTY\|O_CLOEXEC, 0664);
	572	if (j->disk_fd < 0)
	573	return log_error_errno(errno, "Failed to create %s: %m", i->settings_temp_path);
	574
	575	return 0;
	576	}
	577
	578	static void tar_pull_job_on_progress(PullJob *j) {
	579	TarPull *i;
	580
	581	assert(j);
	582	assert(j->userdata);
	583
	584	i = j->userdata;
	585
	586	tar_pull_report_progress(i, TAR_DOWNLOADING);
	587	}
	588
	589	int tar_pull_start(
	590	TarPull *i,
	591	const char *url,
	592	const char *local,
	593	ImportFlags flags,
	594	ImportVerify verify,
	595	const char *checksum) {
	596
	597	int r;
	598
	599	assert(i);
	600	assert(verify == _IMPORT_VERIFY_INVALID \|\| verify < _IMPORT_VERIFY_MAX);
	601	assert(verify == _IMPORT_VERIFY_INVALID \|\| verify >= 0);
	602	assert((verify < 0) \|\| !checksum);
	603	assert(!(flags & ~IMPORT_PULL_FLAGS_MASK_TAR));
	604	assert(!(flags & IMPORT_PULL_SETTINGS) \|\| !(flags & IMPORT_DIRECT));
	605	assert(!(flags & IMPORT_PULL_SETTINGS) \|\| !checksum);
	606
	607	if (!http_url_is_valid(url) && !file_url_is_valid(url))
	608	return -EINVAL;
	609
	610	if (local && !pull_validate_local(local, flags))
	611	return -EINVAL;
	612
	613	if (i->tar_job)
	614	return -EBUSY;
	615
	616	r = free_and_strdup(&i->local, local);
	617	if (r < 0)
	618	return r;
	619
	620	r = free_and_strdup(&i->checksum, checksum);
	621	if (r < 0)
	622	return r;
	623
	624	i->flags = flags;
	625	i->verify = verify;
	626
	627	/* Set up download job for TAR file */
	628	r = pull_job_new(&i->tar_job, url, i->glue, i);
	629	if (r < 0)
	630	return r;
	631
	632	i->tar_job->on_finished = tar_pull_job_on_finished;
	633	i->tar_job->on_open_disk = tar_pull_job_on_open_disk_tar;
	634	i->tar_job->calc_checksum = checksum \|\| IN_SET(verify, IMPORT_VERIFY_CHECKSUM, IMPORT_VERIFY_SIGNATURE);
	635
	636	if (!FLAGS_SET(flags, IMPORT_DIRECT)) {
	637	r = pull_find_old_etags(url, i->image_root, DT_DIR, ".tar-", NULL, &i->tar_job->old_etags);
	638	if (r < 0)
	639	return r;
	640	}
	641
	642	/* Set up download of checksum/signature files */
	643	r = pull_make_verification_jobs(
	644	&i->checksum_job,
	645	&i->signature_job,
	646	verify,
	647	checksum,
	648	url,
	649	i->glue,
	650	tar_pull_job_on_finished,
	651	i);
	652	if (r < 0)
	653	return r;
	654
	655	/* Set up download job for the settings file (.nspawn) */
	656	if (FLAGS_SET(flags, IMPORT_PULL_SETTINGS)) {
	657	r = pull_make_auxiliary_job(
	658	&i->settings_job,
	659	url,
	660	tar_strip_suffixes,
	661	".nspawn",
	662	verify,
	663	i->glue,
	664	tar_pull_job_on_open_disk_settings,
	665	tar_pull_job_on_finished,
	666	i);
	667	if (r < 0)
	668	return r;
	669	}
	670
	671	PullJob *j;
	672	FOREACH_ARGUMENT(j,
	673	i->tar_job,
	674	i->checksum_job,
	675	i->signature_job,
	676	i->settings_job) {
	677
	678	if (!j)
	679	continue;
	680
	681	j->on_progress = tar_pull_job_on_progress;
	682	j->sync = FLAGS_SET(flags, IMPORT_SYNC);
	683
	684	r = pull_job_begin(j);
	685	if (r < 0)
	686	return r;
	687	}
	688
	689	return 0;
	690	}