/* SPDX-License-Identifier: LGPL-2.1+ */
-/***
- This file is part of systemd.
-
- Copyright 2014 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
#include <sys/file.h>
#include <sys/mount.h>
#include "io-util.h"
#include "loop-util.h"
#include "machine-image.h"
+#include "missing_capability.h"
#include "mount-util.h"
#include "process-util.h"
#include "raw-clone.h"
if (pipe2(errno_pipe_fd, O_CLOEXEC|O_NONBLOCK) < 0)
return sd_bus_error_set_errnof(error, errno, "Failed to create pipe: %m");
- child = fork();
- if (child < 0)
- return sd_bus_error_set_errnof(error, errno, "Failed to fork(): %m");
- if (child == 0) {
+ r = safe_fork("(sd-imgrm)", FORK_RESET_SIGNALS, &child);
+ if (r < 0)
+ return sd_bus_error_set_errnof(error, r, "Failed to fork(): %m");
+ if (r == 0) {
errno_pipe_fd[0] = safe_close(errno_pipe_fd[0]);
r = image_remove(image);
if (pipe2(errno_pipe_fd, O_CLOEXEC|O_NONBLOCK) < 0)
return sd_bus_error_set_errnof(error, errno, "Failed to create pipe: %m");
- child = fork();
- if (child < 0)
- return sd_bus_error_set_errnof(error, errno, "Failed to fork(): %m");
- if (child == 0) {
+ r = safe_fork("(sd-imgclone)", FORK_RESET_SIGNALS, &child);
+ if (r < 0)
+ return sd_bus_error_set_errnof(error, r, "Failed to fork(): %m");
+ if (r == 0) {
errno_pipe_fd[0] = safe_close(errno_pipe_fd[0]);
r = image_clone(image, new_name, read_only);
return sd_bus_reply_method_return(message, NULL);
}
-#define EXIT_NOT_FOUND 2
-
-static int directory_image_get_os_release(Image *image, char ***ret, sd_bus_error *error) {
+int bus_image_method_get_hostname(
+ sd_bus_message *message,
+ void *userdata,
+ sd_bus_error *error) {
- _cleanup_free_ char *path = NULL;
+ Image *image = userdata;
int r;
- assert(image);
- assert(ret);
-
- r = chase_symlinks("/etc/os-release", image->path, CHASE_PREFIX_ROOT, &path);
- if (r == -ENOENT)
- r = chase_symlinks("/usr/lib/os-release", image->path, CHASE_PREFIX_ROOT, &path);
- if (r == -ENOENT)
- return sd_bus_error_setf(error, SD_BUS_ERROR_FAILED, "Image does not contain OS release information");
- if (r < 0)
- return sd_bus_error_set_errnof(error, r, "Failed to resolve %s: %m", image->path);
-
- r = load_env_file_pairs(NULL, path, NULL, ret);
- if (r < 0)
- return sd_bus_error_set_errnof(error, r, "Failed to open %s: %m", path);
+ if (!image->metadata_valid) {
+ r = image_read_metadata(image);
+ if (r < 0)
+ return sd_bus_error_set_errnof(error, r, "Failed to read image metadata: %m");
+ }
- return 0;
+ return sd_bus_reply_method_return(message, "s", image->hostname);
}
-static int raw_image_get_os_release(Image *image, char ***ret, sd_bus_error *error) {
- _cleanup_(rmdir_and_freep) char *t = NULL;
- _cleanup_(loop_device_unrefp) LoopDevice *d = NULL;
- _cleanup_(dissected_image_unrefp) DissectedImage *m = NULL;
- _cleanup_(sigkill_waitp) pid_t child = 0;
- _cleanup_close_pair_ int pair[2] = { -1, -1 };
- _cleanup_fclose_ FILE *f = NULL;
- _cleanup_strv_free_ char **v = NULL;
- siginfo_t si;
- int r;
-
- assert(image);
- assert(ret);
-
- r = mkdtemp_malloc("/tmp/machined-root-XXXXXX", &t);
- if (r < 0)
- return sd_bus_error_set_errnof(error, r, "Failed to create temporary directory: %m");
-
- r = loop_device_make_by_path(image->path, O_RDONLY, &d);
- if (r < 0)
- return sd_bus_error_set_errnof(error, r, "Failed to set up loop block device for %s: %m", image->path);
-
- r = dissect_image(d->fd, NULL, 0, DISSECT_IMAGE_REQUIRE_ROOT, &m);
- if (r == -ENOPKG)
- return sd_bus_error_set_errnof(error, r, "Disk image %s not understood: %m", image->path);
- if (r < 0)
- return sd_bus_error_set_errnof(error, r, "Failed to dissect image %s: %m", image->path);
-
- if (pipe2(pair, O_CLOEXEC) < 0)
- return sd_bus_error_set_errnof(error, errno, "Failed to create communication pipe: %m");
-
- child = raw_clone(SIGCHLD|CLONE_NEWNS);
- if (child < 0)
- return sd_bus_error_set_errnof(error, errno, "Failed to fork(): %m");
-
- if (child == 0) {
- int fd;
-
- pair[0] = safe_close(pair[0]);
-
- /* Make sure we never propagate to the host */
- if (mount(NULL, "/", NULL, MS_SLAVE | MS_REC, NULL) < 0)
- _exit(EXIT_FAILURE);
-
- r = dissected_image_mount(m, t, DISSECT_IMAGE_READ_ONLY);
- if (r < 0)
- _exit(EXIT_FAILURE);
-
- r = mount_move_root(t);
- if (r < 0)
- _exit(EXIT_FAILURE);
+int bus_image_method_get_machine_id(
+ sd_bus_message *message,
+ void *userdata,
+ sd_bus_error *error) {
- fd = open("/etc/os-release", O_RDONLY|O_CLOEXEC|O_NOCTTY);
- if (fd < 0 && errno == ENOENT) {
- fd = open("/usr/lib/os-release", O_RDONLY|O_CLOEXEC|O_NOCTTY);
- if (fd < 0 && errno == ENOENT)
- _exit(EXIT_NOT_FOUND);
- }
- if (fd < 0)
- _exit(EXIT_FAILURE);
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
+ Image *image = userdata;
+ int r;
- r = copy_bytes(fd, pair[1], (uint64_t) -1, 0);
+ if (!image->metadata_valid) {
+ r = image_read_metadata(image);
if (r < 0)
- _exit(EXIT_FAILURE);
-
- _exit(EXIT_SUCCESS);
+ return sd_bus_error_set_errnof(error, r, "Failed to read image metadata: %m");
}
- pair[1] = safe_close(pair[1]);
-
- f = fdopen(pair[0], "re");
- if (!f)
- return -errno;
-
- pair[0] = -1;
-
- r = load_env_file_pairs(f, "os-release", NULL, &v);
+ r = sd_bus_message_new_method_return(message, &reply);
if (r < 0)
return r;
- r = wait_for_terminate(child, &si);
+ if (sd_id128_is_null(image->machine_id)) /* Add an empty array if the ID is zero */
+ r = sd_bus_message_append(reply, "ay", 0);
+ else
+ r = sd_bus_message_append_array(reply, 'y', image->machine_id.bytes, 16);
if (r < 0)
- return sd_bus_error_set_errnof(error, r, "Failed to wait for child: %m");
- child = 0;
- if (si.si_code == CLD_EXITED && si.si_status == EXIT_NOT_FOUND)
- return sd_bus_error_setf(error, SD_BUS_ERROR_FAILED, "Image does not contain OS release information");
- if (si.si_code != CLD_EXITED || si.si_status != EXIT_SUCCESS)
- return sd_bus_error_setf(error, SD_BUS_ERROR_FAILED, "Child died abnormally.");
-
- *ret = v;
- v = NULL;
+ return r;
- return 0;
+ return sd_bus_send(NULL, reply, NULL);
}
-int bus_image_method_get_os_release(
+int bus_image_method_get_machine_info(
sd_bus_message *message,
void *userdata,
sd_bus_error *error) {
- _cleanup_release_lock_file_ LockFile tree_global_lock = LOCK_FILE_INIT, tree_local_lock = LOCK_FILE_INIT;
- _cleanup_strv_free_ char **v = NULL;
Image *image = userdata;
int r;
- r = image_path_lock(image->path, LOCK_SH|LOCK_NB, &tree_global_lock, &tree_local_lock);
- if (r < 0)
- return sd_bus_error_set_errnof(error, r, "Failed to lock image: %m");
+ if (!image->metadata_valid) {
+ r = image_read_metadata(image);
+ if (r < 0)
+ return sd_bus_error_set_errnof(error, r, "Failed to read image metadata: %m");
+ }
- switch (image->type) {
+ return bus_reply_pair_array(message, image->machine_info);
+}
- case IMAGE_DIRECTORY:
- case IMAGE_SUBVOLUME:
- r = directory_image_get_os_release(image, &v, error);
- break;
+int bus_image_method_get_os_release(
+ sd_bus_message *message,
+ void *userdata,
+ sd_bus_error *error) {
- case IMAGE_RAW:
- case IMAGE_BLOCK:
- r = raw_image_get_os_release(image, &v, error);
- break;
+ Image *image = userdata;
+ int r;
- default:
- assert_not_reached("Unknown image type");
+ if (!image->metadata_valid) {
+ r = image_read_metadata(image);
+ if (r < 0)
+ return sd_bus_error_set_errnof(error, r, "Failed to read image metadata: %m");
}
- if (r < 0)
- return r;
- return bus_reply_pair_array(message, v);
+ return bus_reply_pair_array(message, image->os_release);
}
const sd_bus_vtable image_vtable[] = {
SD_BUS_METHOD("Clone", "sb", NULL, bus_image_method_clone, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("MarkReadOnly", "b", NULL, bus_image_method_mark_read_only, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("SetLimit", "t", NULL, bus_image_method_set_limit, SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD("GetHostname", NULL, "s", bus_image_method_get_hostname, SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD("GetMachineID", NULL, "ay", bus_image_method_get_machine_id, SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD("GetMachineInfo", NULL, "a{ss}", bus_image_method_get_machine_info, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("GetOSRelease", NULL, "a{ss}", bus_image_method_get_os_release, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_VTABLE_END
};
static int image_flush_cache(sd_event_source *s, void *userdata) {
Manager *m = userdata;
- Image *i;
assert(s);
assert(m);
- while ((i = hashmap_steal_first(m->image_cache)))
- image_unref(i);
-
+ hashmap_clear(m->image_cache);
return 0;
}
return 1;
}
- r = hashmap_ensure_allocated(&m->image_cache, &string_hash_ops);
+ r = hashmap_ensure_allocated(&m->image_cache, &image_hash_ops);
if (r < 0)
return r;
if (r < 0)
return r;
- r = image_find(e, &image);
- if (r <= 0)
+ r = image_find(IMAGE_MACHINE, e, &image);
+ if (r == -ENOENT)
+ return 0;
+ if (r < 0)
return r;
image->userdata = m;
}
int image_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {
- _cleanup_(image_hashmap_freep) Hashmap *images = NULL;
+ _cleanup_hashmap_free_ Hashmap *images = NULL;
_cleanup_strv_free_ char **l = NULL;
Image *image;
Iterator i;
assert(path);
assert(nodes);
- images = hashmap_new(&string_hash_ops);
+ images = hashmap_new(&image_hash_ops);
if (!images)
return -ENOMEM;
- r = image_discover(images);
+ r = image_discover(IMAGE_MACHINE, images);
if (r < 0)
return r;
return r;
}
- *nodes = l;
- l = NULL;
+ *nodes = TAKE_PTR(l);
return 1;
}
projects / thirdparty / systemd.git / blobdiff