Also, expose it in machinectl.
/systemd-efi-boot-generator
/systemd-escape
/systemd-evcat
+/systemd-export
/systemd-firstboot
/systemd-fsck
/systemd-fsckd
rootlibexec_PROGRAMS += \
systemd-importd \
systemd-pull \
- systemd-import
+ systemd-import \
+ systemd-export
systemd_importd_SOURCES = \
src/import/importd.c
systemd_importd_CFLAGS = \
$(AM_CFLAGS) \
-D SYSTEMD_PULL_PATH=\"$(rootlibexecdir)/systemd-pull\" \
- -D SYSTEMD_IMPORT_PATH=\"$(rootlibexecdir)/systemd-import\"
+ -D SYSTEMD_IMPORT_PATH=\"$(rootlibexecdir)/systemd-import\" \
+ -D SYSTEMD_EXPORT_PATH=\"$(rootlibexecdir)/systemd-export\"
systemd_importd_LDADD = \
libsystemd-internal.la \
$(ZLIB_LIBS) \
-lbz2
+systemd_export_SOURCES = \
+ src/import/export.c \
+ src/import/export-tar.c \
+ src/import/export-tar.h \
+ src/import/export-raw.c \
+ src/import/export-raw.h \
+ src/import/import-common.c \
+ src/import/import-common.h \
+ src/import/import-compress.c \
+ src/import/import-compress.h
+
+systemd_export_CFLAGS = \
+ $(AM_CFLAGS) \
+ $(XZ_CFLAGS) \
+ $(ZLIB_CFLAGS)
+
+systemd_export_LDADD = \
+ libsystemd-internal.la \
+ libsystemd-label.la \
+ libsystemd-shared.la \
+ $(XZ_LIBS) \
+ $(ZLIB_LIBS) \
+ -lbz2
+
dist_rootlibexec_DATA = \
src/import/import-pubring.gpg
--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2015 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/sendfile.h>
+#include <libgen.h>
+#undef basename
+
+#include "sd-daemon.h"
+#include "util.h"
+#include "ratelimit.h"
+#include "btrfs-util.h"
+#include "copy.h"
+#include "import-common.h"
+#include "export-raw.h"
+
+#define COPY_BUFFER_SIZE (16*1024)
+
+struct RawExport {
+ sd_event *event;
+
+ RawExportFinished on_finished;
+ void *userdata;
+
+ char *path;
+
+ int input_fd;
+ int output_fd;
+
+ ImportCompress compress;
+
+ sd_event_source *output_event_source;
+
+ void *buffer;
+ size_t buffer_size;
+ size_t buffer_allocated;
+
+ uint64_t written_compressed;
+ uint64_t written_uncompressed;
+
+ unsigned last_percent;
+ RateLimit progress_rate_limit;
+
+ struct stat st;
+
+ bool eof;
+ bool tried_reflink;
+ bool tried_sendfile;
+};
+
+RawExport *raw_export_unref(RawExport *e) {
+ if (!e)
+ return NULL;
+
+ sd_event_source_unref(e->output_event_source);
+
+ import_compress_free(&e->compress);
+
+ sd_event_unref(e->event);
+
+ safe_close(e->input_fd);
+
+ free(e->buffer);
+ free(e->path);
+ free(e);
+
+ return NULL;
+}
+
+int raw_export_new(
+ RawExport **ret,
+ sd_event *event,
+ RawExportFinished on_finished,
+ void *userdata) {
+
+ _cleanup_(raw_export_unrefp) RawExport *e = NULL;
+ int r;
+
+ assert(ret);
+
+ e = new0(RawExport, 1);
+ if (!e)
+ return -ENOMEM;
+
+ e->output_fd = e->input_fd = -1;
+ e->on_finished = on_finished;
+ e->userdata = userdata;
+
+ RATELIMIT_INIT(e->progress_rate_limit, 100 * USEC_PER_MSEC, 1);
+ e->last_percent = (unsigned) -1;
+
+ if (event)
+ e->event = sd_event_ref(event);
+ else {
+ r = sd_event_default(&e->event);
+ if (r < 0)
+ return r;
+ }
+
+ *ret = e;
+ e = NULL;
+
+ return 0;
+}
+
+static void raw_export_report_progress(RawExport *e) {
+ unsigned percent;
+ assert(e);
+
+ if (e->written_uncompressed >= (uint64_t) e->st.st_size)
+ percent = 100;
+ else
+ percent = (unsigned) ((e->written_uncompressed * UINT64_C(100)) / (uint64_t) e->st.st_size);
+
+ if (percent == e->last_percent)
+ return;
+
+ if (!ratelimit_test(&e->progress_rate_limit))
+ return;
+
+ sd_notifyf(false, "X_IMPORT_PROGRESS=%u", percent);
+ log_info("Exported %u%%.", percent);
+
+ e->last_percent = percent;
+}
+
+static int raw_export_process(RawExport *e) {
+ ssize_t l;
+ int r;
+
+ assert(e);
+
+ if (!e->tried_reflink && e->compress.type == IMPORT_COMPRESS_UNCOMPRESSED) {
+
+ /* If we shall take an uncompressed snapshot we can
+ * reflink source to destination directly. Let's see
+ * if this works. */
+
+ r = btrfs_reflink(e->input_fd, e->output_fd);
+ if (r >= 0) {
+ r = 0;
+ goto finish;
+ }
+
+ e->tried_reflink = true;
+ }
+
+ if (!e->tried_sendfile && e->compress.type == IMPORT_COMPRESS_UNCOMPRESSED) {
+
+ l = sendfile(e->output_fd, e->input_fd, NULL, COPY_BUFFER_SIZE);
+ if (l < 0) {
+ if (errno == EAGAIN)
+ return 0;
+
+ e->tried_sendfile = true;
+ } else if (l == 0) {
+ r = 0;
+ goto finish;
+ } else {
+ e->written_uncompressed += l;
+ e->written_compressed += l;
+
+ raw_export_report_progress(e);
+
+ return 0;
+ }
+ }
+
+ while (e->buffer_size <= 0) {
+ uint8_t input[COPY_BUFFER_SIZE];
+
+ if (e->eof) {
+ r = 0;
+ goto finish;
+ }
+
+ l = read(e->input_fd, input, sizeof(input));
+ if (l < 0) {
+ r = log_error_errno(errno, "Failed to read raw file: %m");
+ goto finish;
+ }
+
+ if (l == 0) {
+ e->eof = true;
+ r = import_compress_finish(&e->compress, &e->buffer, &e->buffer_size, &e->buffer_allocated);
+ } else {
+ e->written_uncompressed += l;
+ r = import_compress(&e->compress, input, l, &e->buffer, &e->buffer_size, &e->buffer_allocated);
+ }
+ if (r < 0) {
+ r = log_error_errno(r, "Failed to encode: %m");
+ goto finish;
+ }
+ }
+
+ l = write(e->output_fd, e->buffer, e->buffer_size);
+ if (l < 0) {
+ if (errno == EAGAIN)
+ return 0;
+
+ r = log_error_errno(errno, "Failed to write output file: %m");
+ goto finish;
+ }
+
+ assert((size_t) l <= e->buffer_size);
+ memmove(e->buffer, (uint8_t*) e->buffer + l, e->buffer_size - l);
+ e->buffer_size -= l;
+ e->written_compressed += l;
+
+ raw_export_report_progress(e);
+
+ return 0;
+
+finish:
+ if (r >= 0) {
+ (void) copy_times(e->input_fd, e->output_fd);
+ (void) copy_xattr(e->input_fd, e->output_fd);
+ }
+
+ if (e->on_finished)
+ e->on_finished(e, r, e->userdata);
+ else
+ sd_event_exit(e->event, r);
+
+ return 0;
+}
+
+static int raw_export_on_output(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+ RawExport *i = userdata;
+
+ return raw_export_process(i);
+}
+
+static int raw_export_on_defer(sd_event_source *s, void *userdata) {
+ RawExport *i = userdata;
+
+ return raw_export_process(i);
+}
+
+static int reflink_snapshot(int fd, const char *path) {
+ char *p, *d;
+ int new_fd, r;
+
+ p = strdupa(path);
+ d = dirname(p);
+
+ new_fd = open(d, O_TMPFILE|O_CLOEXEC|O_NOCTTY|O_RDWR, 0600);
+ if (new_fd < 0) {
+ _cleanup_free_ char *t = NULL;
+
+ r = tempfn_random(path, &t);
+ if (r < 0)
+ return r;
+
+ new_fd = open(t, O_CLOEXEC|O_CREAT|O_NOCTTY|O_RDWR, 0600);
+ if (new_fd < 0)
+ return -errno;
+
+ (void) unlink(t);
+ }
+
+ r = btrfs_reflink(fd, new_fd);
+ if (r < 0) {
+ safe_close(new_fd);
+ return r;
+ }
+
+ return new_fd;
+}
+
+int raw_export_start(RawExport *e, const char *path, int fd, ImportCompressType compress) {
+ _cleanup_close_ int sfd = -1, tfd = -1;
+ int r;
+
+ assert(e);
+ assert(path);
+ assert(fd >= 0);
+ assert(compress < _IMPORT_COMPRESS_TYPE_MAX);
+ assert(compress != IMPORT_COMPRESS_UNKNOWN);
+
+ if (e->output_fd >= 0)
+ return -EBUSY;
+
+ r = fd_nonblock(fd, true);
+ if (r < 0)
+ return r;
+
+ r = free_and_strdup(&e->path, path);
+ if (r < 0)
+ return r;
+
+ sfd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY);
+ if (sfd < 0)
+ return -errno;
+
+ if (fstat(sfd, &e->st) < 0)
+ return -errno;
+ if (!S_ISREG(e->st.st_mode))
+ return -ENOTTY;
+
+ /* Try to take a reflink snapshot of the file, if we can t make the export atomic */
+ tfd = reflink_snapshot(sfd, path);
+ if (tfd >= 0) {
+ e->input_fd = tfd;
+ tfd = -1;
+ } else {
+ e->input_fd = sfd;
+ sfd = -1;
+ }
+
+ r = import_compress_init(&e->compress, compress);
+ if (r < 0)
+ return r;
+
+ r = sd_event_add_io(e->event, &e->output_event_source, fd, EPOLLOUT, raw_export_on_output, e);
+ if (r == -EPERM) {
+ r = sd_event_add_defer(e->event, &e->output_event_source, raw_export_on_defer, e);
+ if (r < 0)
+ return r;
+
+ r = sd_event_source_set_enabled(e->output_event_source, SD_EVENT_ON);
+ }
+ if (r < 0)
+ return r;
+
+ e->output_fd = fd;
+ return r;
+}
--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2015 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 "sd-event.h"
+#include "macro.h"
+#include "import-compress.h"
+
+typedef struct RawExport RawExport;
+
+typedef void (*RawExportFinished)(RawExport *export, int error, void *userdata);
+
+int raw_export_new(RawExport **export, sd_event *event, RawExportFinished on_finished, void *userdata);
+RawExport* raw_export_unref(RawExport *export);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(RawExport*, raw_export_unref);
+
+int raw_export_start(RawExport *export, const char *path, int fd, ImportCompressType compress);
--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2015 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/sendfile.h>
+
+#include "sd-daemon.h"
+#include "util.h"
+#include "ratelimit.h"
+#include "btrfs-util.h"
+#include "import-common.h"
+#include "export-tar.h"
+
+#define COPY_BUFFER_SIZE (16*1024)
+
+struct TarExport {
+ sd_event *event;
+
+ TarExportFinished on_finished;
+ void *userdata;
+
+ char *path;
+ char *temp_path;
+
+ int output_fd;
+ int tar_fd;
+
+ ImportCompress compress;
+
+ sd_event_source *output_event_source;
+
+ void *buffer;
+ size_t buffer_size;
+ size_t buffer_allocated;
+
+ uint64_t written_compressed;
+ uint64_t written_uncompressed;
+
+ pid_t tar_pid;
+
+ struct stat st;
+ uint64_t quota_referenced;
+
+ unsigned last_percent;
+ RateLimit progress_rate_limit;
+
+ bool eof;
+ bool tried_splice;
+};
+
+TarExport *tar_export_unref(TarExport *e) {
+ if (!e)
+ return NULL;
+
+ sd_event_source_unref(e->output_event_source);
+
+ if (e->tar_pid > 1) {
+ (void) kill_and_sigcont(e->tar_pid, SIGKILL);
+ (void) wait_for_terminate(e->tar_pid, NULL);
+ }
+
+ if (e->temp_path) {
+ (void) btrfs_subvol_remove(e->temp_path);
+ free(e->temp_path);
+ }
+
+ import_compress_free(&e->compress);
+
+ sd_event_unref(e->event);
+
+ safe_close(e->tar_fd);
+
+ free(e->buffer);
+ free(e->path);
+ free(e);
+
+ return NULL;
+}
+
+int tar_export_new(
+ TarExport **ret,
+ sd_event *event,
+ TarExportFinished on_finished,
+ void *userdata) {
+
+ _cleanup_(tar_export_unrefp) TarExport *e = NULL;
+ int r;
+
+ assert(ret);
+
+ e = new0(TarExport, 1);
+ if (!e)
+ return -ENOMEM;
+
+ e->output_fd = e->tar_fd = -1;
+ e->on_finished = on_finished;
+ e->userdata = userdata;
+ e->quota_referenced = (uint64_t) -1;
+
+ RATELIMIT_INIT(e->progress_rate_limit, 100 * USEC_PER_MSEC, 1);
+ e->last_percent = (unsigned) -1;
+
+ if (event)
+ e->event = sd_event_ref(event);
+ else {
+ r = sd_event_default(&e->event);
+ if (r < 0)
+ return r;
+ }
+
+ *ret = e;
+ e = NULL;
+
+ return 0;
+}
+
+static void tar_export_report_progress(TarExport *e) {
+ unsigned percent;
+ assert(e);
+
+ /* Do we have any quota info? I fnot, we don't know anything about the progress */
+ if (e->quota_referenced == (uint64_t) -1)
+ return;
+
+ if (e->written_uncompressed >= e->quota_referenced)
+ percent = 100;
+ else
+ percent = (unsigned) ((e->written_uncompressed * UINT64_C(100)) / e->quota_referenced);
+
+ if (percent == e->last_percent)
+ return;
+
+ if (!ratelimit_test(&e->progress_rate_limit))
+ return;
+
+ sd_notifyf(false, "X_IMPORT_PROGRESS=%u", percent);
+ log_info("Exported %u%%.", percent);
+
+ e->last_percent = percent;
+}
+
+static int tar_export_process(TarExport *e) {
+ ssize_t l;
+ int r;
+
+ assert(e);
+
+ if (!e->tried_splice && e->compress.type == IMPORT_COMPRESS_UNCOMPRESSED) {
+
+ l = splice(e->tar_fd, NULL, e->output_fd, NULL, COPY_BUFFER_SIZE, 0);
+ if (l < 0) {
+ if (errno == EAGAIN)
+ return 0;
+
+ e->tried_splice = true;
+ } else if (l == 0) {
+ r = 0;
+ goto finish;
+ } else {
+ e->written_uncompressed += l;
+ e->written_compressed += l;
+
+ tar_export_report_progress(e);
+
+ return 0;
+ }
+ }
+
+ while (e->buffer_size <= 0) {
+ uint8_t input[COPY_BUFFER_SIZE];
+
+ if (e->eof) {
+ r = 0;
+ goto finish;
+ }
+
+ l = read(e->tar_fd, input, sizeof(input));
+ if (l < 0) {
+ r = log_error_errno(errno, "Failed to read tar file: %m");
+ goto finish;
+ }
+
+ if (l == 0) {
+ e->eof = true;
+ r = import_compress_finish(&e->compress, &e->buffer, &e->buffer_size, &e->buffer_allocated);
+ } else {
+ e->written_uncompressed += l;
+ r = import_compress(&e->compress, input, l, &e->buffer, &e->buffer_size, &e->buffer_allocated);
+ }
+ if (r < 0) {
+ r = log_error_errno(r, "Failed to encode: %m");
+ goto finish;
+ }
+ }
+
+ l = write(e->output_fd, e->buffer, e->buffer_size);
+ if (l < 0) {
+ if (errno == EAGAIN)
+ return 0;
+
+ r = log_error_errno(errno, "Failed to write output file: %m");
+ goto finish;
+ }
+
+ assert((size_t) l <= e->buffer_size);
+ memmove(e->buffer, (uint8_t*) e->buffer + l, e->buffer_size - l);
+ e->buffer_size -= l;
+ e->written_compressed += l;
+
+ tar_export_report_progress(e);
+
+ return 0;
+
+finish:
+ if (e->on_finished)
+ e->on_finished(e, r, e->userdata);
+ else
+ sd_event_exit(e->event, r);
+
+ return 0;
+}
+
+static int tar_export_on_output(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+ TarExport *i = userdata;
+
+ return tar_export_process(i);
+}
+
+static int tar_export_on_defer(sd_event_source *s, void *userdata) {
+ TarExport *i = userdata;
+
+ return tar_export_process(i);
+}
+
+int tar_export_start(TarExport *e, const char *path, int fd, ImportCompressType compress) {
+ _cleanup_close_ int sfd = -1;
+ int r;
+
+ assert(e);
+ assert(path);
+ assert(fd >= 0);
+ assert(compress < _IMPORT_COMPRESS_TYPE_MAX);
+ assert(compress != IMPORT_COMPRESS_UNKNOWN);
+
+ if (e->output_fd >= 0)
+ return -EBUSY;
+
+ sfd = open(path, O_DIRECTORY|O_RDONLY|O_NOCTTY|O_CLOEXEC);
+ if (sfd < 0)
+ return -errno;
+
+ if (fstat(sfd, &e->st) < 0)
+ return -errno;
+
+ r = fd_nonblock(fd, true);
+ if (r < 0)
+ return r;
+
+ r = free_and_strdup(&e->path, path);
+ if (r < 0)
+ return r;
+
+ e->quota_referenced = (uint64_t) -1;
+
+ if (e->st.st_ino == 256) { /* might be a btrfs subvolume? */
+ BtrfsQuotaInfo q;
+
+ r = btrfs_subvol_get_quota_fd(sfd, &q);
+ if (r >= 0)
+ e->quota_referenced = q.referred;
+
+ free(e->temp_path);
+ e->temp_path = NULL;
+
+ r = tempfn_random(path, &e->temp_path);
+ if (r < 0)
+ return r;
+
+ /* Let's try to make a snapshot, if we can, so that the export is atomic */
+ r = btrfs_subvol_snapshot_fd(sfd, e->temp_path, true, false);
+ if (r < 0) {
+ log_debug_errno(r, "Couldn't create snapshot %s of %s, not exporting atomically: %m", e->temp_path, path);
+ free(e->temp_path);
+ e->temp_path = NULL;
+ }
+ }
+
+ r = import_compress_init(&e->compress, compress);
+ if (r < 0)
+ return r;
+
+ r = sd_event_add_io(e->event, &e->output_event_source, fd, EPOLLOUT, tar_export_on_output, e);
+ if (r == -EPERM) {
+ r = sd_event_add_defer(e->event, &e->output_event_source, tar_export_on_defer, e);
+ if (r < 0)
+ return r;
+
+ r = sd_event_source_set_enabled(e->output_event_source, SD_EVENT_ON);
+ }
+ if (r < 0)
+ return r;
+
+ e->tar_fd = import_fork_tar_c(e->temp_path ?: e->path, &e->tar_pid);
+ if (e->tar_fd < 0) {
+ e->output_event_source = sd_event_source_unref(e->output_event_source);
+ return e->tar_fd;
+ }
+
+ e->output_fd = fd;
+ return r;
+}
--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2015 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 "sd-event.h"
+#include "macro.h"
+#include "import-compress.h"
+
+typedef struct TarExport TarExport;
+
+typedef void (*TarExportFinished)(TarExport *export, int error, void *userdata);
+
+int tar_export_new(TarExport **export, sd_event *event, TarExportFinished on_finished, void *userdata);
+TarExport* tar_export_unref(TarExport *export);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(TarExport*, tar_export_unref);
+
+int tar_export_start(TarExport *export, const char *path, int fd, ImportCompressType compress);
--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2015 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 <getopt.h>
+
+#include "sd-event.h"
+#include "event-util.h"
+#include "verbs.h"
+#include "build.h"
+#include "machine-image.h"
+#include "import-util.h"
+#include "export-tar.h"
+#include "export-raw.h"
+
+static ImportCompressType arg_compress = IMPORT_COMPRESS_UNKNOWN;
+
+static void determine_compression_from_filename(const char *p) {
+
+ if (arg_compress != IMPORT_COMPRESS_UNKNOWN)
+ return;
+
+ if (!p) {
+ arg_compress = IMPORT_COMPRESS_UNCOMPRESSED;
+ return;
+ }
+
+ if (endswith(p, ".xz"))
+ arg_compress = IMPORT_COMPRESS_XZ;
+ else if (endswith(p, ".gz"))
+ arg_compress = IMPORT_COMPRESS_GZIP;
+ else if (endswith(p, ".bz2"))
+ arg_compress = IMPORT_COMPRESS_BZIP2;
+ else
+ arg_compress = IMPORT_COMPRESS_UNCOMPRESSED;
+}
+
+static int interrupt_signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
+ log_notice("Transfer aborted.");
+ sd_event_exit(sd_event_source_get_event(s), EINTR);
+ return 0;
+}
+
+static void on_tar_finished(TarExport *export, int error, void *userdata) {
+ sd_event *event = userdata;
+ assert(export);
+
+ if (error == 0)
+ log_info("Operation completed successfully.");
+
+ sd_event_exit(event, abs(error));
+}
+
+static int export_tar(int argc, char *argv[], void *userdata) {
+ _cleanup_(tar_export_unrefp) TarExport *export = NULL;
+ _cleanup_event_unref_ sd_event *event = NULL;
+ _cleanup_(image_unrefp) Image *image = NULL;
+ const char *path = NULL, *local = NULL;
+ _cleanup_close_ int open_fd = -1;
+ int r, fd;
+
+ if (machine_name_is_valid(argv[1])) {
+ r = image_find(argv[1], &image);
+ if (r < 0)
+ return log_error_errno(r, "Failed to look for machine %s: %m", argv[1]);
+ if (r == 0) {
+ log_error("Machine image %s not found.", argv[1]);
+ return -ENOENT;
+ }
+
+ local = image->path;
+ } else
+ local = argv[1];
+
+ if (argc >= 3)
+ path = argv[2];
+ if (isempty(path) || streq(path, "-"))
+ path = NULL;
+
+ determine_compression_from_filename(path);
+
+ if (path) {
+ open_fd = open(path, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC|O_NOCTTY, 0666);
+ if (open_fd < 0)
+ return log_error_errno(errno, "Failed to open tar image for export: %m");
+
+ fd = open_fd;
+
+ log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, path, import_compress_type_to_string(arg_compress));
+ } else {
+ _cleanup_free_ char *pretty = NULL;
+
+ fd = STDOUT_FILENO;
+
+ (void) readlink_malloc("/proc/self/fd/1", &pretty);
+ log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, strna(pretty), import_compress_type_to_string(arg_compress));
+ }
+
+ r = sd_event_default(&event);
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate event loop: %m");
+
+ assert_se(sigprocmask_many(SIG_BLOCK, SIGTERM, SIGINT, -1) == 0);
+ sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler, NULL);
+ sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL);
+
+ r = tar_export_new(&export, event, on_tar_finished, event);
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate exporter: %m");
+
+ r = tar_export_start(export, local, fd, arg_compress);
+ if (r < 0)
+ return log_error_errno(r, "Failed to export image: %m");
+
+ r = sd_event_loop(event);
+ if (r < 0)
+ return log_error_errno(r, "Failed to run event loop: %m");
+
+ log_info("Exiting.");
+ return -r;
+}
+
+static void on_raw_finished(RawExport *export, int error, void *userdata) {
+ sd_event *event = userdata;
+ assert(export);
+
+ if (error == 0)
+ log_info("Operation completed successfully.");
+
+ sd_event_exit(event, abs(error));
+}
+
+static int export_raw(int argc, char *argv[], void *userdata) {
+ _cleanup_(raw_export_unrefp) RawExport *export = NULL;
+ _cleanup_event_unref_ sd_event *event = NULL;
+ _cleanup_(image_unrefp) Image *image = NULL;
+ const char *path = NULL, *local = NULL;
+ _cleanup_close_ int open_fd = -1;
+ int r, fd;
+
+ if (machine_name_is_valid(argv[1])) {
+ r = image_find(argv[1], &image);
+ if (r < 0)
+ return log_error_errno(r, "Failed to look for machine %s: %m", argv[1]);
+ if (r == 0) {
+ log_error("Machine image %s not found.", argv[1]);
+ return -ENOENT;
+ }
+
+ local = image->path;
+ } else
+ local = argv[1];
+
+ if (argc >= 3)
+ path = argv[2];
+ if (isempty(path) || streq(path, "-"))
+ path = NULL;
+
+ determine_compression_from_filename(path);
+
+ if (path) {
+ open_fd = open(path, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC|O_NOCTTY, 0666);
+ if (open_fd < 0)
+ return log_error_errno(errno, "Failed to open raw image for export: %m");
+
+ fd = open_fd;
+
+ log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, path, import_compress_type_to_string(arg_compress));
+ } else {
+ _cleanup_free_ char *pretty = NULL;
+
+ fd = STDOUT_FILENO;
+
+ (void) readlink_malloc("/proc/self/fd/1", &pretty);
+ log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, strna(pretty), import_compress_type_to_string(arg_compress));
+ }
+
+ r = sd_event_default(&event);
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate event loop: %m");
+
+ assert_se(sigprocmask_many(SIG_BLOCK, SIGTERM, SIGINT, -1) == 0);
+ sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler, NULL);
+ sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL);
+
+ r = raw_export_new(&export, event, on_raw_finished, event);
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate exporter: %m");
+
+ r = raw_export_start(export, local, fd, arg_compress);
+ if (r < 0)
+ return log_error_errno(r, "Failed to export image: %m");
+
+ r = sd_event_loop(event);
+ if (r < 0)
+ return log_error_errno(r, "Failed to run event loop: %m");
+
+ log_info("Exiting.");
+ return -r;
+}
+
+static int help(int argc, char *argv[], void *userdata) {
+
+ printf("%s [OPTIONS...] {COMMAND} ...\n\n"
+ "Export container or virtual machine images.\n\n"
+ " -h --help Show this help\n"
+ " --version Show package version\n"
+ " --format=FORMAT Select format\n\n"
+ "Commands:\n"
+ " tar NAME [FILE] Export a TAR image\n"
+ " raw NAME [FILE] Export a RAW image\n",
+ program_invocation_short_name);
+
+ return 0;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_VERSION = 0x100,
+ ARG_FORMAT,
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ { "format", required_argument, NULL, ARG_FORMAT },
+ {}
+ };
+
+ int c;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
+
+ switch (c) {
+
+ case 'h':
+ return help(0, NULL, NULL);
+
+ case ARG_VERSION:
+ puts(PACKAGE_STRING);
+ puts(SYSTEMD_FEATURES);
+ return 0;
+
+ case ARG_FORMAT:
+ if (streq(optarg, "uncompressed"))
+ arg_compress = IMPORT_COMPRESS_UNCOMPRESSED;
+ else if (streq(optarg, "xz"))
+ arg_compress = IMPORT_COMPRESS_XZ;
+ else if (streq(optarg, "gzip"))
+ arg_compress = IMPORT_COMPRESS_GZIP;
+ else if (streq(optarg, "bzip2"))
+ arg_compress = IMPORT_COMPRESS_BZIP2;
+ else {
+ log_error("Unknown format: %s", optarg);
+ return -EINVAL;
+ }
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ assert_not_reached("Unhandled option");
+ }
+
+ return 1;
+}
+
+static int export_main(int argc, char *argv[]) {
+
+ static const Verb verbs[] = {
+ { "help", VERB_ANY, VERB_ANY, 0, help },
+ { "tar", 2, 3, 0, export_tar },
+ { "raw", 2, 3, 0, export_raw },
+ {}
+ };
+
+ return dispatch_verb(argc, argv, verbs, NULL);
+}
+
+int main(int argc, char *argv[]) {
+ int r;
+
+ setlocale(LC_ALL, "");
+ log_parse_environment();
+ log_open();
+
+ r = parse_argv(argc, argv);
+ if (r <= 0)
+ goto finish;
+
+ ignore_signals(SIGPIPE, -1);
+
+ r = export_main(argc, argv);
+
+finish:
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
return import_make_read_only_fd(fd);
}
-int import_fork_tar(const char *path, pid_t *ret) {
+int import_fork_tar_x(const char *path, pid_t *ret) {
_cleanup_close_pair_ int pipefd[2] = { -1, -1 };
pid_t pid;
int r;
return r;
}
+
+int import_fork_tar_c(const char *path, pid_t *ret) {
+ _cleanup_close_pair_ int pipefd[2] = { -1, -1 };
+ pid_t pid;
+ int r;
+
+ assert(path);
+ assert(ret);
+
+ if (pipe2(pipefd, O_CLOEXEC) < 0)
+ return log_error_errno(errno, "Failed to create pipe for tar: %m");
+
+ pid = fork();
+ if (pid < 0)
+ return log_error_errno(errno, "Failed to fork off tar: %m");
+
+ if (pid == 0) {
+ int null_fd;
+ uint64_t retain = (1ULL << CAP_DAC_OVERRIDE);
+
+ /* Child */
+
+ reset_all_signal_handlers();
+ reset_signal_mask();
+ assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0);
+
+ pipefd[0] = safe_close(pipefd[0]);
+
+ if (dup2(pipefd[1], STDOUT_FILENO) != STDOUT_FILENO) {
+ log_error_errno(errno, "Failed to dup2() fd: %m");
+ _exit(EXIT_FAILURE);
+ }
+
+ if (pipefd[1] != STDOUT_FILENO)
+ pipefd[1] = safe_close(pipefd[1]);
+
+ null_fd = open("/dev/null", O_RDONLY|O_NOCTTY);
+ if (null_fd < 0) {
+ log_error_errno(errno, "Failed to open /dev/null: %m");
+ _exit(EXIT_FAILURE);
+ }
+
+ if (dup2(null_fd, STDIN_FILENO) != STDIN_FILENO) {
+ log_error_errno(errno, "Failed to dup2() fd: %m");
+ _exit(EXIT_FAILURE);
+ }
+
+ if (null_fd != STDIN_FILENO)
+ null_fd = safe_close(null_fd);
+
+ fd_cloexec(STDIN_FILENO, false);
+ fd_cloexec(STDOUT_FILENO, false);
+ fd_cloexec(STDERR_FILENO, false);
+
+ if (unshare(CLONE_NEWNET) < 0)
+ log_error_errno(errno, "Failed to lock tar into network namespace, ignoring: %m");
+
+ r = capability_bounding_set_drop(~retain, true);
+ if (r < 0)
+ log_error_errno(r, "Failed to drop capabilities, ignoring: %m");
+
+ execlp("tar", "tar", "--sparse", "-C", path, "-c", ".", NULL);
+ log_error_errno(errno, "Failed to execute tar: %m");
+ _exit(EXIT_FAILURE);
+ }
+
+ pipefd[1] = safe_close(pipefd[1]);
+ r = pipefd[0];
+ pipefd[0] = -1;
+
+ *ret = pid;
+
+ return r;
+}
int import_make_read_only_fd(int fd);
int import_make_read_only(const char *path);
-int import_fork_tar(const char *path, pid_t *ret);
+int import_fork_tar_c(const char *path, pid_t *ret);
+int import_fork_tar_x(const char *path, pid_t *ret);
if (c->type == IMPORT_COMPRESS_XZ)
lzma_end(&c->xz);
- else if (c->type == IMPORT_COMPRESS_GZIP)
- inflateEnd(&c->gzip);
- else if (c->type == IMPORT_COMPRESS_BZIP2)
- BZ2_bzDecompressEnd(&c->bzip2);
+ else if (c->type == IMPORT_COMPRESS_GZIP) {
+ if (c->encoding)
+ deflateEnd(&c->gzip);
+ else
+ inflateEnd(&c->gzip);
+ } else if (c->type == IMPORT_COMPRESS_BZIP2) {
+ if (c->encoding)
+ BZ2_bzCompressEnd(&c->bzip2);
+ else
+ BZ2_bzDecompressEnd(&c->bzip2);
+ }
c->type = IMPORT_COMPRESS_UNKNOWN;
}
} else
c->type = IMPORT_COMPRESS_UNCOMPRESSED;
+ c->encoding = false;
+
return 1;
}
if (r <= 0)
return r;
+ if (c->encoding)
+ return -EINVAL;
+
if (size <= 0)
return 1;
return 1;
}
+int import_compress_init(ImportCompress *c, ImportCompressType t) {
+ int r;
+
+ assert(c);
+
+ switch (t) {
+
+ case IMPORT_COMPRESS_XZ: {
+ lzma_ret xzr;
+
+ xzr = lzma_easy_encoder(&c->xz, LZMA_PRESET_DEFAULT, LZMA_CHECK_CRC64);
+ if (xzr != LZMA_OK)
+ return -EIO;
+
+ c->type = IMPORT_COMPRESS_XZ;
+ break;
+ }
+
+ case IMPORT_COMPRESS_GZIP:
+ r = deflateInit2(&c->gzip, Z_DEFAULT_COMPRESSION, Z_DEFLATED, 15 + 16, 8, Z_DEFAULT_STRATEGY);
+ if (r != Z_OK)
+ return -EIO;
+
+ c->type = IMPORT_COMPRESS_GZIP;
+ break;
+
+ case IMPORT_COMPRESS_BZIP2:
+ r = BZ2_bzCompressInit(&c->bzip2, 9, 0, 0);
+ if (r != BZ_OK)
+ return -EIO;
+
+ c->type = IMPORT_COMPRESS_BZIP2;
+ break;
+
+ case IMPORT_COMPRESS_UNCOMPRESSED:
+ c->type = IMPORT_COMPRESS_UNCOMPRESSED;
+ break;
+
+ default:
+ return -ENOTSUP;
+ }
+
+ c->encoding = true;
+ return 0;
+}
+
+static int enlarge_buffer(void **buffer, size_t *buffer_size, size_t *buffer_allocated) {
+ size_t l;
+ void *p;
+
+ if (*buffer_allocated > *buffer_size)
+ return 0;
+
+ l = MAX(16*1024U, (*buffer_size * 2));
+ p = realloc(*buffer, l);
+ if (!p)
+ return -ENOMEM;
+
+ *buffer = p;
+ *buffer_allocated = l;
+
+ return 1;
+}
+
+int import_compress(ImportCompress *c, const void *data, size_t size, void **buffer, size_t *buffer_size, size_t *buffer_allocated) {
+ int r;
+
+ assert(c);
+ assert(buffer);
+ assert(buffer_size);
+ assert(buffer_allocated);
+
+ if (!c->encoding)
+ return -EINVAL;
+
+ if (size <= 0)
+ return 0;
+
+ assert(data);
+
+ *buffer_size = 0;
+
+ switch (c->type) {
+
+ case IMPORT_COMPRESS_XZ:
+
+ c->xz.next_in = data;
+ c->xz.avail_in = size;
+
+ while (c->xz.avail_in > 0) {
+ lzma_ret lzr;
+
+ r = enlarge_buffer(buffer, buffer_size, buffer_allocated);
+ if (r < 0)
+ return r;
+
+ c->xz.next_out = (uint8_t*) *buffer + *buffer_size;
+ c->xz.avail_out = *buffer_allocated - *buffer_size;
+
+ lzr = lzma_code(&c->xz, LZMA_RUN);
+ if (lzr != LZMA_OK)
+ return -EIO;
+
+ *buffer_size += (*buffer_allocated - *buffer_size) - c->xz.avail_out;
+ }
+
+ break;
+
+ case IMPORT_COMPRESS_GZIP:
+
+ c->gzip.next_in = (void*) data;
+ c->gzip.avail_in = size;
+
+ while (c->gzip.avail_in > 0) {
+ r = enlarge_buffer(buffer, buffer_size, buffer_allocated);
+ if (r < 0)
+ return r;
+
+ c->gzip.next_out = (uint8_t*) *buffer + *buffer_size;
+ c->gzip.avail_out = *buffer_allocated - *buffer_size;
+
+ r = deflate(&c->gzip, Z_NO_FLUSH);
+ if (r != Z_OK)
+ return -EIO;
+
+ *buffer_size += (*buffer_allocated - *buffer_size) - c->gzip.avail_out;
+ }
+
+ break;
+
+ case IMPORT_COMPRESS_BZIP2:
+
+ c->bzip2.next_in = (void*) data;
+ c->bzip2.avail_in = size;
+
+ while (c->bzip2.avail_in > 0) {
+ r = enlarge_buffer(buffer, buffer_size, buffer_allocated);
+ if (r < 0)
+ return r;
+
+ c->bzip2.next_out = (void*) ((uint8_t*) *buffer + *buffer_size);
+ c->bzip2.avail_out = *buffer_allocated - *buffer_size;
+
+ r = BZ2_bzCompress(&c->bzip2, BZ_RUN);
+ if (r != BZ_RUN_OK)
+ return -EIO;
+
+ *buffer_size += (*buffer_allocated - *buffer_size) - c->bzip2.avail_out;
+ }
+
+ break;
+
+ case IMPORT_COMPRESS_UNCOMPRESSED:
+
+ if (*buffer_allocated < size) {
+ void *p;
+
+ p = realloc(*buffer, size);
+ if (!p)
+ return -ENOMEM;
+
+ *buffer = p;
+ *buffer_allocated = size;
+ }
+
+ memcpy(*buffer, data, size);
+ *buffer_size = size;
+ break;
+
+ default:
+ return -ENOTSUP;
+ }
+
+ return 0;
+}
+
+int import_compress_finish(ImportCompress *c, void **buffer, size_t *buffer_size, size_t *buffer_allocated) {
+ int r;
+
+ assert(c);
+ assert(buffer);
+ assert(buffer_size);
+ assert(buffer_allocated);
+
+ if (!c->encoding)
+ return -EINVAL;
+
+ *buffer_size = 0;
+
+ switch (c->type) {
+
+ case IMPORT_COMPRESS_XZ: {
+ lzma_ret lzr;
+
+ c->xz.avail_in = 0;
+
+ do {
+ r = enlarge_buffer(buffer, buffer_size, buffer_allocated);
+ if (r < 0)
+ return r;
+
+ c->xz.next_out = (uint8_t*) *buffer + *buffer_size;
+ c->xz.avail_out = *buffer_allocated - *buffer_size;
+
+ lzr = lzma_code(&c->xz, LZMA_FINISH);
+ if (lzr != LZMA_OK && lzr != LZMA_STREAM_END)
+ return -EIO;
+
+ *buffer_size += (*buffer_allocated - *buffer_size) - c->xz.avail_out;
+ } while (lzr != LZMA_STREAM_END);
+
+ break;
+ }
+
+ case IMPORT_COMPRESS_GZIP:
+ c->gzip.avail_in = 0;
+
+ do {
+ r = enlarge_buffer(buffer, buffer_size, buffer_allocated);
+ if (r < 0)
+ return r;
+
+ c->gzip.next_out = (uint8_t*) *buffer + *buffer_size;
+ c->gzip.avail_out = *buffer_allocated - *buffer_size;
+
+ r = deflate(&c->gzip, Z_FINISH);
+ if (r != Z_OK && r != Z_STREAM_END)
+ return -EIO;
+
+ *buffer_size += (*buffer_allocated - *buffer_size) - c->gzip.avail_out;
+ } while (r != Z_STREAM_END);
+
+ break;
+
+ case IMPORT_COMPRESS_BZIP2:
+ c->bzip2.avail_in = 0;
+
+ do {
+ r = enlarge_buffer(buffer, buffer_size, buffer_allocated);
+ if (r < 0)
+ return r;
+
+ c->bzip2.next_out = (void*) ((uint8_t*) *buffer + *buffer_size);
+ c->bzip2.avail_out = *buffer_allocated - *buffer_size;
+
+ r = BZ2_bzCompress(&c->bzip2, BZ_FINISH);
+ if (r != BZ_FINISH_OK && r != BZ_STREAM_END)
+ return -EIO;
+
+ *buffer_size += (*buffer_allocated - *buffer_size) - c->bzip2.avail_out;
+ } while (r != BZ_STREAM_END);
+
+ break;
+
+ case IMPORT_COMPRESS_UNCOMPRESSED:
+ break;
+
+ default:
+ return -ENOTSUP;
+ }
+
+ return 0;
+}
+
static const char* const import_compress_type_table[_IMPORT_COMPRESS_TYPE_MAX] = {
[IMPORT_COMPRESS_UNKNOWN] = "unknown",
[IMPORT_COMPRESS_UNCOMPRESSED] = "uncompressed",
typedef struct ImportCompress {
ImportCompressType type;
-
+ bool encoding;
union {
lzma_stream xz;
z_stream gzip;
void import_compress_free(ImportCompress *c);
int import_uncompress_detect(ImportCompress *c, const void *data, size_t size);
-
int import_uncompress(ImportCompress *c, const void *data, size_t size, ImportCompressCallback callback, void *userdata);
+int import_compress_init(ImportCompress *c, ImportCompressType t);
+int import_compress(ImportCompress *c, const void *data, size_t size, void **buffer, size_t *buffer_size, size_t *buffer_allocated);
+int import_compress_finish(ImportCompress *c, void **buffer, size_t *buffer_size, size_t *buffer_allocated);
+
const char* import_compress_type_to_string(ImportCompressType t) _const_;
ImportCompressType import_compress_type_from_string(const char *s) _pure_;
i->on_finished = on_finished;
i->userdata = userdata;
- RATELIMIT_INIT(i->progress_rate_limit, 500 * USEC_PER_MSEC, 1);
+ RATELIMIT_INIT(i->progress_rate_limit, 100 * USEC_PER_MSEC, 1);
i->last_percent = (unsigned) -1;
i->image_root = strdup(image_root ?: "/var/lib/machines");
l = read(i->input_fd, i->buffer + i->buffer_size, sizeof(i->buffer) - i->buffer_size);
if (l < 0) {
+ if (errno == EAGAIN)
+ return 0;
+
r = log_error_errno(errno, "Failed to read input file: %m");
goto finish;
}
if (i->input_fd >= 0)
return -EBUSY;
+ r = fd_nonblock(fd, true);
+ if (r < 0)
+ return r;
+
r = free_and_strdup(&i->local, local);
if (r < 0)
return r;
if (!i)
return NULL;
- sd_event_unref(i->event);
+ sd_event_source_unref(i->input_event_source);
if (i->tar_pid > 1) {
(void) kill_and_sigcont(i->tar_pid, SIGKILL);
import_compress_free(&i->compress);
- sd_event_source_unref(i->input_event_source);
+ sd_event_unref(i->event);
safe_close(i->tar_fd);
i->on_finished = on_finished;
i->userdata = userdata;
- RATELIMIT_INIT(i->progress_rate_limit, 500 * USEC_PER_MSEC, 1);
+ RATELIMIT_INIT(i->progress_rate_limit, 100 * USEC_PER_MSEC, 1);
i->last_percent = (unsigned) -1;
i->image_root = strdup(image_root ?: "/var/lib/machines");
} else if (r < 0)
return log_error_errno(errno, "Failed to create subvolume %s: %m", i->temp_path);
- i->tar_fd = import_fork_tar(i->temp_path, &i->tar_pid);
+ i->tar_fd = import_fork_tar_x(i->temp_path, &i->tar_pid);
if (i->tar_fd < 0)
return i->tar_fd;
l = read(i->input_fd, i->buffer + i->buffer_size, sizeof(i->buffer) - i->buffer_size);
if (l < 0) {
+ if (errno == EAGAIN)
+ return 0;
+
r = log_error_errno(errno, "Failed to read input file: %m");
goto finish;
}
if (i->input_fd >= 0)
return -EBUSY;
+ r = fd_nonblock(fd, true);
+ if (r < 0)
+ return r;
+
r = free_and_strdup(&i->local, local);
if (r < 0)
return r;
static int help(int argc, char *argv[], void *userdata) {
printf("%s [OPTIONS...] {COMMAND} ...\n\n"
- "Import container or virtual machine image.\n\n"
+ "Import container or virtual machine images.\n\n"
" -h --help Show this help\n"
" --version Show package version\n"
" --force Force creation of image\n"
" --image-root=PATH Image root directory\n"
" --read-only Create a read-only image\n\n"
"Commands:\n"
- " tar FILE [NAME] Download a TAR image\n"
- " raw FILE [NAME] Download a RAW image\n",
+ " tar FILE [NAME] Import a TAR image\n"
+ " raw FILE [NAME] Import a RAW image\n",
program_invocation_short_name);
return 0;
typedef enum TransferType {
TRANSFER_IMPORT_TAR,
TRANSFER_IMPORT_RAW,
+ TRANSFER_EXPORT_TAR,
+ TRANSFER_EXPORT_RAW,
TRANSFER_PULL_TAR,
TRANSFER_PULL_RAW,
TRANSFER_PULL_DKR,
bool read_only;
char *dkr_index_url;
+ char *format;
pid_t pid;
unsigned progress_percent;
int stdin_fd;
+ int stdout_fd;
};
struct Manager {
static const char* const transfer_type_table[_TRANSFER_TYPE_MAX] = {
[TRANSFER_IMPORT_TAR] = "import-tar",
[TRANSFER_IMPORT_RAW] = "import-raw",
+ [TRANSFER_EXPORT_TAR] = "export-tar",
+ [TRANSFER_EXPORT_RAW] = "export-raw",
[TRANSFER_PULL_TAR] = "pull-tar",
[TRANSFER_PULL_RAW] = "pull-raw",
[TRANSFER_PULL_DKR] = "pull-dkr",
free(t->remote);
free(t->local);
free(t->dkr_index_url);
+ free(t->format);
free(t->object_path);
if (t->pid > 0) {
safe_close(t->log_fd);
safe_close(t->stdin_fd);
+ safe_close(t->stdout_fd);
free(t);
return NULL;
return -errno;
if (t->pid == 0) {
const char *cmd[] = {
- NULL, /* systemd-import or systemd-pull */
+ NULL, /* systemd-import, systemd-export or systemd-pull */
NULL, /* tar, raw, dkr */
NULL, /* --verify= */
NULL, /* verify argument */
NULL, /* maybe --force */
NULL, /* maybe --read-only */
NULL, /* maybe --dkr-index-url */
- NULL, /* the actual URL */
+ NULL, /* if so: the actual URL */
+ NULL, /* maybe --format= */
+ NULL, /* if so: the actual format */
NULL, /* remote */
NULL, /* local */
NULL
pipefd[0] = safe_close(pipefd[0]);
- if (dup2(pipefd[1], STDOUT_FILENO) != STDOUT_FILENO) {
+ if (dup2(pipefd[1], STDERR_FILENO) != STDERR_FILENO) {
log_error_errno(errno, "Failed to dup2() fd: %m");
_exit(EXIT_FAILURE);
}
- if (dup2(pipefd[1], STDERR_FILENO) != STDERR_FILENO) {
- log_error_errno(errno, "Failed to dup2() fd: %m");
- _exit(EXIT_FAILURE);
+ if (t->stdout_fd >= 0) {
+ if (dup2(t->stdout_fd, STDOUT_FILENO) != STDOUT_FILENO) {
+ log_error_errno(errno, "Failed to dup2() fd: %m");
+ _exit(EXIT_FAILURE);
+ }
+
+ if (t->stdout_fd != STDOUT_FILENO)
+ safe_close(t->stdout_fd);
+ } else {
+ if (dup2(pipefd[1], STDOUT_FILENO) != STDOUT_FILENO) {
+ log_error_errno(errno, "Failed to dup2() fd: %m");
+ _exit(EXIT_FAILURE);
+ }
}
if (pipefd[1] != STDOUT_FILENO && pipefd[1] != STDERR_FILENO)
if (IN_SET(t->type, TRANSFER_IMPORT_TAR, TRANSFER_IMPORT_RAW))
cmd[k++] = SYSTEMD_IMPORT_PATH;
+ else if (IN_SET(t->type, TRANSFER_EXPORT_TAR, TRANSFER_EXPORT_RAW))
+ cmd[k++] = SYSTEMD_EXPORT_PATH;
else
cmd[k++] = SYSTEMD_PULL_PATH;
- if (IN_SET(t->type, TRANSFER_IMPORT_TAR, TRANSFER_PULL_TAR))
+ if (IN_SET(t->type, TRANSFER_IMPORT_TAR, TRANSFER_EXPORT_TAR, TRANSFER_PULL_TAR))
cmd[k++] = "tar";
- else if (IN_SET(t->type, TRANSFER_IMPORT_RAW, TRANSFER_PULL_RAW))
+ else if (IN_SET(t->type, TRANSFER_IMPORT_RAW, TRANSFER_EXPORT_RAW, TRANSFER_PULL_RAW))
cmd[k++] = "raw";
else
cmd[k++] = "dkr";
cmd[k++] = t->dkr_index_url;
}
- if (t->remote)
- cmd[k++] = t->remote;
- else
- cmd[k++] = "-";
+ if (t->format) {
+ cmd[k++] = "--format";
+ cmd[k++] = t->format;
+ }
+
+ if (!IN_SET(t->type, TRANSFER_EXPORT_TAR, TRANSFER_EXPORT_RAW)) {
+ if (t->remote)
+ cmd[k++] = t->remote;
+ else
+ cmd[k++] = "-";
+ }
if (t->local)
cmd[k++] = t->local;
return sd_bus_reply_method_return(msg, "uo", id, object);
}
+static int method_export_tar_or_raw(sd_bus *bus, sd_bus_message *msg, void *userdata, sd_bus_error *error) {
+ _cleanup_(transfer_unrefp) Transfer *t = NULL;
+ int fd, r;
+ const char *local, *object, *format;
+ Manager *m = userdata;
+ TransferType type;
+ uint32_t id;
+
+ r = bus_verify_polkit_async(
+ msg,
+ CAP_SYS_ADMIN,
+ "org.freedesktop.import1.export",
+ false,
+ UID_INVALID,
+ &m->polkit_registry,
+ error);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return 1; /* Will call us back */
+
+ r = sd_bus_message_read(msg, "shs", &local, &fd, &format);
+ if (r < 0)
+ return r;
+
+ if (!machine_name_is_valid(local))
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Local name %s is invalid", local);
+
+ type = streq_ptr(sd_bus_message_get_member(msg), "ExportTar") ? TRANSFER_EXPORT_TAR : TRANSFER_EXPORT_RAW;
+
+ r = transfer_new(m, &t);
+ if (r < 0)
+ return r;
+
+ t->type = type;
+
+ if (!isempty(format)) {
+ t->format = strdup(format);
+ if (!t->format)
+ return -ENOMEM;
+ }
+
+ t->local = strdup(local);
+ if (!t->local)
+ return -ENOMEM;
+
+ t->stdout_fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
+ if (t->stdout_fd < 0)
+ return -errno;
+
+ r = transfer_start(t);
+ if (r < 0)
+ return r;
+
+ object = t->object_path;
+ id = t->id;
+ t = NULL;
+
+ return sd_bus_reply_method_return(msg, "uo", id, object);
+}
+
static int method_pull_tar_or_raw(sd_bus *bus, sd_bus_message *msg, void *userdata, sd_bus_error *error) {
_cleanup_(transfer_unrefp) Transfer *t = NULL;
const char *remote, *local, *verify, *object;
SD_BUS_VTABLE_START(0),
SD_BUS_METHOD("ImportTar", "hsbb", "uo", method_import_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("ImportRaw", "hsbb", "uo", method_import_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD("ExportTar", "shs", "uo", method_export_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD("ExportRaw", "shs", "uo", method_export_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("PullTar", "sssb", "uo", method_pull_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("PullRaw", "sssb", "uo", method_pull_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("PullDkr", "sssssb", "uo", method_pull_dkr, SD_BUS_VTABLE_UNPRIVILEGED),
</defaults>
</action>
+ <action id="org.freedesktop.import1.export">
+ <_description>Export a VM or container image</_description>
+ <_message>Authentication is required to export a VM or container image</_message>
+ <defaults>
+ <allow_any>auth_admin</allow_any>
+ <allow_inactive>auth_admin</allow_inactive>
+ <allow_active>auth_admin_keep</allow_active>
+ </defaults>
+ </action>
+
<action id="org.freedesktop.import1.pull">
<_description>Download a VM or container image</_description>
<_message>Authentication is required to download a VM or container image</_message>
if (r < 0)
return log_error_errno(r, "Failed to make btrfs subvolume %s: %m", i->temp_path);
- j->disk_fd = import_fork_tar(i->temp_path, &i->tar_pid);
+ j->disk_fd = import_fork_tar_x(i->temp_path, &i->tar_pid);
if (j->disk_fd < 0)
return j->disk_fd;
} else if (r < 0)
return log_error_errno(errno, "Failed to create subvolume %s: %m", i->temp_path);
- j->disk_fd = import_fork_tar(i->temp_path, &i->tar_pid);
+ j->disk_fd = import_fork_tar_x(i->temp_path, &i->tar_pid);
if (j->disk_fd < 0)
return j->disk_fd;
static int help(int argc, char *argv[], void *userdata) {
printf("%s [OPTIONS...] {COMMAND} ...\n\n"
- "Download container or virtual machine image.\n\n"
+ "Download container or virtual machine images.\n\n"
" -h --help Show this help\n"
" --version Show package version\n"
" --force Force creation of image\n"
static bool arg_force = false;
static ImportVerify arg_verify = IMPORT_VERIFY_SIGNATURE;
static const char* arg_dkr_index_url = NULL;
+static const char* arg_format = NULL;
static void pager_open_if_enabled(void) {
return 0;
}
-static int pull_image_common(sd_bus *bus, sd_bus_message *m) {
+static int transfer_image_common(sd_bus *bus, sd_bus_message *m) {
_cleanup_bus_slot_unref_ sd_bus_slot *slot_job_removed = NULL, *slot_log_message = NULL;
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
r = sd_bus_call(bus, m, 0, &error, &reply);
if (r < 0) {
- log_error("Failed acquire image: %s", bus_error_message(&error, -r));
+ log_error("Failed transfer image: %s", bus_error_message(&error, -r));
return r;
}
if (r < 0)
return bus_log_create_error(r);
- return pull_image_common(bus, m);
+ return transfer_image_common(bus, m);
}
static int import_raw(int argc, char *argv[], void *userdata) {
if (r < 0)
return bus_log_create_error(r);
- return pull_image_common(bus, m);
+ return transfer_image_common(bus, m);
+}
+
+static void determine_compression_from_filename(const char *p) {
+ if (arg_format)
+ return;
+
+ if (!p)
+ return;
+
+ if (endswith(p, ".xz"))
+ arg_format = "xz";
+ else if (endswith(p, ".gz"))
+ arg_format = "gzip";
+ else if (endswith(p, ".bz2"))
+ arg_format = "bzip2";
+}
+
+static int export_tar(int argc, char *argv[], void *userdata) {
+ _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+ _cleanup_free_ char *ll = NULL;
+ _cleanup_close_ int fd = -1;
+ const char *local = NULL, *path = NULL;
+ sd_bus *bus = userdata;
+ int r;
+
+ assert(bus);
+
+ local = argv[1];
+ if (!machine_name_is_valid(local)) {
+ log_error("Machine name %s is not valid.", local);
+ return -EINVAL;
+ }
+
+ if (argc >= 3)
+ path = argv[2];
+ if (isempty(path) || streq(path, "-"))
+ path = NULL;
+
+ if (path) {
+ determine_compression_from_filename(path);
+
+ fd = open(path, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC|O_NOCTTY, 0666);
+ if (fd < 0)
+ return log_error_errno(errno, "Failed to open %s: %m", path);
+ }
+
+ r = sd_bus_message_new_method_call(
+ bus,
+ &m,
+ "org.freedesktop.import1",
+ "/org/freedesktop/import1",
+ "org.freedesktop.import1.Manager",
+ "ExportTar");
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = sd_bus_message_append(
+ m,
+ "shs",
+ local,
+ fd >= 0 ? fd : STDOUT_FILENO,
+ arg_format);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ return transfer_image_common(bus, m);
+}
+
+static int export_raw(int argc, char *argv[], void *userdata) {
+ _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+ _cleanup_free_ char *ll = NULL;
+ _cleanup_close_ int fd = -1;
+ const char *local = NULL, *path = NULL;
+ sd_bus *bus = userdata;
+ int r;
+
+ assert(bus);
+
+ local = argv[1];
+ if (!machine_name_is_valid(local)) {
+ log_error("Machine name %s is not valid.", local);
+ return -EINVAL;
+ }
+
+ if (argc >= 3)
+ path = argv[2];
+ if (isempty(path) || streq(path, "-"))
+ path = NULL;
+
+ if (path) {
+ determine_compression_from_filename(path);
+
+ fd = open(path, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC|O_NOCTTY, 0666);
+ if (fd < 0)
+ return log_error_errno(errno, "Failed to open %s: %m", path);
+ }
+
+ r = sd_bus_message_new_method_call(
+ bus,
+ &m,
+ "org.freedesktop.import1",
+ "/org/freedesktop/import1",
+ "org.freedesktop.import1.Manager",
+ "ExportRaw");
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = sd_bus_message_append(
+ m,
+ "shs",
+ local,
+ fd >= 0 ? fd : STDOUT_FILENO,
+ arg_format);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ return transfer_image_common(bus, m);
}
static int pull_tar(int argc, char *argv[], void *userdata) {
if (r < 0)
return bus_log_create_error(r);
- return pull_image_common(bus, m);
+ return transfer_image_common(bus, m);
}
static int pull_raw(int argc, char *argv[], void *userdata) {
if (r < 0)
return bus_log_create_error(r);
- return pull_image_common(bus, m);
+ return transfer_image_common(bus, m);
}
static int pull_dkr(int argc, char *argv[], void *userdata) {
if (r < 0)
return bus_log_create_error(r);
- return pull_image_common(bus, m);
+ return transfer_image_common(bus, m);
}
typedef struct TransferInfo {
" remove NAME... Remove an image\n"
" set-limit [NAME] BYTES Set image or pool size limit (disk quota)\n\n"
"Image Transfer Commands:\n"
- " import-tar FILE [NAME] Import a local TAR container image\n"
- " import-raw FILE [NAME] Import a local RAW container or VM image\n"
" pull-tar URL [NAME] Download a TAR container image\n"
" pull-raw URL [NAME] Download a RAW container or VM image\n"
" pull-dkr REMOTE [NAME] Download a DKR container image\n"
+ " import-tar FILE [NAME] Import a local TAR container image\n"
+ " import-raw FILE [NAME] Import a local RAW container or VM image\n"
+ " export-tar FILE [NAME] Export a TAR container image locally\n"
+ " export-raw FILE [NAME] Export a RAW container or VM image locally\n"
" list-transfers Show list of downloads in progress\n"
" cancel-transfer Cancel a download\n"
, program_invocation_short_name);
ARG_VERIFY,
ARG_FORCE,
ARG_DKR_INDEX_URL,
+ ARG_FORMAT,
};
static const struct option options[] = {
{ "verify", required_argument, NULL, ARG_VERIFY },
{ "force", no_argument, NULL, ARG_FORCE },
{ "dkr-index-url", required_argument, NULL, ARG_DKR_INDEX_URL },
+ { "format", required_argument, NULL, ARG_FORMAT },
{}
};
arg_dkr_index_url = optarg;
break;
+ case ARG_FORMAT:
+ if (!STR_IN_SET(optarg, "uncompressed", "xz", "gzip", "bzip2")) {
+ log_error("Unknown format: %s", optarg);
+ return -EINVAL;
+ }
+
+ arg_format = optarg;
+ break;
+
case '?':
return -EINVAL;
{ "disable", 2, VERB_ANY, 0, enable_machine },
{ "import-tar", 2, 3, 0, import_tar },
{ "import-raw", 2, 3, 0, import_raw },
+ { "export-tar", 2, 3, 0, export_tar },
+ { "export-raw", 2, 3, 0, export_raw },
{ "pull-tar", 2, 3, 0, pull_tar },
{ "pull-raw", 2, 3, 0, pull_raw },
{ "pull-dkr", 2, 3, 0, pull_dkr },
return F_TYPE_EQUAL(sfs.f_type, BTRFS_SUPER_MAGIC);
}
-int btrfs_subvol_snapshot(const char *old_path, const char *new_path, bool read_only, bool fallback_copy) {
+int btrfs_subvol_snapshot_fd(int old_fd, const char *new_path, bool read_only, bool fallback_copy) {
struct btrfs_ioctl_vol_args_v2 args = {
.flags = read_only ? BTRFS_SUBVOL_RDONLY : 0,
};
- _cleanup_close_ int old_fd = -1, new_fd = -1;
+ _cleanup_close_ int new_fd = -1;
const char *subvolume;
int r;
- assert(old_path);
-
- old_fd = open(old_path, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
- if (old_fd < 0)
- return -errno;
+ assert(new_path);
r = btrfs_is_snapshot(old_fd);
if (r < 0)
return r;
if (r == 0) {
+ if (!fallback_copy)
+ return -EISDIR;
- if (fallback_copy) {
- r = btrfs_subvol_make(new_path);
- if (r < 0)
- return r;
+ r = btrfs_subvol_make(new_path);
+ if (r < 0)
+ return r;
+
+ r = copy_directory_fd(old_fd, new_path, true);
+ if (r < 0) {
+ btrfs_subvol_remove(new_path);
+ return r;
+ }
- r = copy_directory_fd(old_fd, new_path, true);
+ if (read_only) {
+ r = btrfs_subvol_set_read_only(new_path, true);
if (r < 0) {
btrfs_subvol_remove(new_path);
return r;
}
-
- if (read_only) {
- r = btrfs_subvol_set_read_only(new_path, true);
- if (r < 0) {
- btrfs_subvol_remove(new_path);
- return r;
- }
- }
-
- return 0;
}
- return -EISDIR;
+ return 0;
}
r = extract_subvolume_name(new_path, &subvolume);
return 0;
}
+int btrfs_subvol_snapshot(const char *old_path, const char *new_path, bool read_only, bool fallback_copy) {
+ _cleanup_close_ int old_fd = -1;
+
+ assert(old_path);
+ assert(new_path);
+
+ old_fd = open(old_path, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
+ if (old_fd < 0)
+ return -errno;
+
+ return btrfs_subvol_snapshot_fd(old_fd, new_path, read_only, fallback_copy);
+}
+
int btrfs_subvol_make(const char *path) {
struct btrfs_ioctl_vol_args args = {};
_cleanup_close_ int fd = -1;
int btrfs_subvol_make(const char *path);
int btrfs_subvol_make_label(const char *path);
int btrfs_subvol_remove(const char *path);
+
+int btrfs_subvol_snapshot_fd(int old_fd, const char *new_path, bool read_only, bool fallback_copy);
int btrfs_subvol_snapshot(const char *old_path, const char *new_path, bool read_only, bool fallback_copy);
int btrfs_subvol_set_read_only_fd(int fd, bool b);
~ianmdlvl / elogind.git / commitdiff