1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2015 Lennart Poettering
7 systemd is free software; you can redistribute it and/or modify it
8 under the terms of the GNU Lesser General Public License as published by
9 the Free Software Foundation; either version 2.1 of the License, or
10 (at your option) any later version.
12 systemd is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public License
18 along with systemd; If not, see <http://www.gnu.org/licenses/>.
23 #include "sd-daemon.h"
26 #include "alloc-util.h"
27 #include "btrfs-util.h"
32 #include "hostname-util.h"
33 #include "import-common.h"
34 #include "import-compress.h"
35 #include "import-tar.h"
37 #include "machine-pool.h"
39 #include "path-util.h"
40 #include "process-util.h"
41 #include "qcow2-util.h"
42 #include "ratelimit.h"
44 #include "string-util.h"
52 TarImportFinished on_finished
;
58 bool grow_machine_directory
;
66 ImportCompress compress
;
68 uint64_t written_since_last_grow
;
70 sd_event_source
*input_event_source
;
72 uint8_t buffer
[16*1024];
75 uint64_t written_compressed
;
76 uint64_t written_uncompressed
;
82 unsigned last_percent
;
83 RateLimit progress_rate_limit
;
86 TarImport
* tar_import_unref(TarImport
*i
) {
90 sd_event_source_unref(i
->input_event_source
);
93 (void) kill_and_sigcont(i
->tar_pid
, SIGKILL
);
94 (void) wait_for_terminate(i
->tar_pid
, NULL
);
98 (void) rm_rf(i
->temp_path
, REMOVE_ROOT
|REMOVE_PHYSICAL
|REMOVE_SUBVOLUME
);
102 import_compress_free(&i
->compress
);
104 sd_event_unref(i
->event
);
106 safe_close(i
->tar_fd
);
117 const char *image_root
,
118 TarImportFinished on_finished
,
121 _cleanup_(tar_import_unrefp
) TarImport
*i
= NULL
;
126 i
= new0(TarImport
, 1);
130 i
->input_fd
= i
->tar_fd
= -1;
131 i
->on_finished
= on_finished
;
132 i
->userdata
= userdata
;
134 RATELIMIT_INIT(i
->progress_rate_limit
, 100 * USEC_PER_MSEC
, 1);
135 i
->last_percent
= (unsigned) -1;
137 i
->image_root
= strdup(image_root
?: "/var/lib/machines");
141 i
->grow_machine_directory
= path_startswith(i
->image_root
, "/var/lib/machines");
144 i
->event
= sd_event_ref(event
);
146 r
= sd_event_default(&i
->event
);
156 static void tar_import_report_progress(TarImport
*i
) {
160 /* We have no size information, unless the source is a regular file */
161 if (!S_ISREG(i
->st
.st_mode
))
164 if (i
->written_compressed
>= (uint64_t) i
->st
.st_size
)
167 percent
= (unsigned) ((i
->written_compressed
* UINT64_C(100)) / (uint64_t) i
->st
.st_size
);
169 if (percent
== i
->last_percent
)
172 if (!ratelimit_test(&i
->progress_rate_limit
))
175 sd_notifyf(false, "X_IMPORT_PROGRESS=%u", percent
);
176 log_info("Imported %u%%.", percent
);
178 i
->last_percent
= percent
;
181 static int tar_import_finish(TarImport
*i
) {
185 assert(i
->tar_fd
>= 0);
186 assert(i
->temp_path
);
187 assert(i
->final_path
);
189 i
->tar_fd
= safe_close(i
->tar_fd
);
191 if (i
->tar_pid
> 0) {
192 r
= wait_for_terminate_and_check("tar", i
->tar_pid
, WAIT_LOG
);
199 r
= import_make_read_only(i
->temp_path
);
205 (void) rm_rf(i
->final_path
, REMOVE_ROOT
|REMOVE_PHYSICAL
|REMOVE_SUBVOLUME
);
207 r
= rename_noreplace(AT_FDCWD
, i
->temp_path
, AT_FDCWD
, i
->final_path
);
209 return log_error_errno(r
, "Failed to move image into place: %m");
211 i
->temp_path
= mfree(i
->temp_path
);
216 static int tar_import_fork_tar(TarImport
*i
) {
221 assert(!i
->final_path
);
222 assert(!i
->temp_path
);
223 assert(i
->tar_fd
< 0);
225 i
->final_path
= strjoin(i
->image_root
, "/", i
->local
);
229 r
= tempfn_random(i
->final_path
, NULL
, &i
->temp_path
);
233 (void) mkdir_parents_label(i
->temp_path
, 0700);
235 r
= btrfs_subvol_make(i
->temp_path
);
237 if (mkdir(i
->temp_path
, 0755) < 0)
238 return log_error_errno(errno
, "Failed to create directory %s: %m", i
->temp_path
);
240 return log_error_errno(r
, "Failed to create subvolume %s: %m", i
->temp_path
);
242 (void) import_assign_pool_quota_and_warn(i
->temp_path
);
244 i
->tar_fd
= import_fork_tar_x(i
->temp_path
, &i
->tar_pid
);
251 static int tar_import_write(const void *p
, size_t sz
, void *userdata
) {
252 TarImport
*i
= userdata
;
255 if (i
->grow_machine_directory
&& i
->written_since_last_grow
>= GROW_INTERVAL_BYTES
) {
256 i
->written_since_last_grow
= 0;
257 grow_machine_directory();
260 r
= loop_write(i
->tar_fd
, p
, sz
, false);
264 i
->written_uncompressed
+= sz
;
265 i
->written_since_last_grow
+= sz
;
270 static int tar_import_process(TarImport
*i
) {
275 assert(i
->buffer_size
< sizeof(i
->buffer
));
277 l
= read(i
->input_fd
, i
->buffer
+ i
->buffer_size
, sizeof(i
->buffer
) - i
->buffer_size
);
282 r
= log_error_errno(errno
, "Failed to read input file: %m");
286 if (i
->compress
.type
== IMPORT_COMPRESS_UNKNOWN
) {
287 log_error("Premature end of file.");
292 r
= tar_import_finish(i
);
298 if (i
->compress
.type
== IMPORT_COMPRESS_UNKNOWN
) {
299 r
= import_uncompress_detect(&i
->compress
, i
->buffer
, i
->buffer_size
);
301 log_error_errno(r
, "Failed to detect file compression: %m");
304 if (r
== 0) /* Need more data */
307 r
= tar_import_fork_tar(i
);
312 r
= import_uncompress(&i
->compress
, i
->buffer
, i
->buffer_size
, tar_import_write
, i
);
314 log_error_errno(r
, "Failed to decode and write: %m");
318 i
->written_compressed
+= i
->buffer_size
;
321 tar_import_report_progress(i
);
327 i
->on_finished(i
, r
, i
->userdata
);
329 sd_event_exit(i
->event
, r
);
334 static int tar_import_on_input(sd_event_source
*s
, int fd
, uint32_t revents
, void *userdata
) {
335 TarImport
*i
= userdata
;
337 return tar_import_process(i
);
340 static int tar_import_on_defer(sd_event_source
*s
, void *userdata
) {
341 TarImport
*i
= userdata
;
343 return tar_import_process(i
);
346 int tar_import_start(TarImport
*i
, int fd
, const char *local
, bool force_local
, bool read_only
) {
353 if (!machine_name_is_valid(local
))
356 if (i
->input_fd
>= 0)
359 r
= fd_nonblock(fd
, true);
363 r
= free_and_strdup(&i
->local
, local
);
366 i
->force_local
= force_local
;
367 i
->read_only
= read_only
;
369 if (fstat(fd
, &i
->st
) < 0)
372 r
= sd_event_add_io(i
->event
, &i
->input_event_source
, fd
, EPOLLIN
, tar_import_on_input
, i
);
374 /* This fd does not support epoll, for example because it is a regular file. Busy read in that case */
375 r
= sd_event_add_defer(i
->event
, &i
->input_event_source
, tar_import_on_defer
, i
);
379 r
= sd_event_source_set_enabled(i
->input_event_source
, SD_EVENT_ON
);