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Diffstat (limited to 'src/grp-machine/libmachine-core/src/image-dbus.c')
-rw-r--r--src/grp-machine/libmachine-core/src/image-dbus.c422
1 files changed, 422 insertions, 0 deletions
diff --git a/src/grp-machine/libmachine-core/src/image-dbus.c b/src/grp-machine/libmachine-core/src/image-dbus.c
new file mode 100644
index 0000000000..f3467bf193
--- /dev/null
+++ b/src/grp-machine/libmachine-core/src/image-dbus.c
@@ -0,0 +1,422 @@
+/***
+ 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 "machine-core/image-dbus.h"
+#include "sd-bus/bus-util.h"
+#include "systemd-basic/alloc-util.h"
+#include "systemd-basic/bus-label.h"
+#include "systemd-basic/fd-util.h"
+#include "systemd-basic/io-util.h"
+#include "systemd-basic/process-util.h"
+#include "systemd-basic/strv.h"
+#include "systemd-basic/user-util.h"
+#include "systemd-shared/machine-image.h"
+
+static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, image_type, ImageType);
+
+int bus_image_method_remove(
+ sd_bus_message *message,
+ void *userdata,
+ sd_bus_error *error) {
+
+ _cleanup_close_pair_ int errno_pipe_fd[2] = { -1, -1 };
+ Image *image = userdata;
+ Manager *m = image->userdata;
+ pid_t child;
+ int r;
+
+ assert(message);
+ assert(image);
+
+ if (m->n_operations >= OPERATIONS_MAX)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Too many ongoing operations.");
+
+ r = bus_verify_polkit_async(
+ message,
+ CAP_SYS_ADMIN,
+ "org.freedesktop.machine1.manage-images",
+ NULL,
+ false,
+ UID_INVALID,
+ &m->polkit_registry,
+ error);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return 1; /* Will call us back */
+
+ 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) {
+ errno_pipe_fd[0] = safe_close(errno_pipe_fd[0]);
+
+ r = image_remove(image);
+ if (r < 0) {
+ (void) write(errno_pipe_fd[1], &r, sizeof(r));
+ _exit(EXIT_FAILURE);
+ }
+
+ _exit(EXIT_SUCCESS);
+ }
+
+ errno_pipe_fd[1] = safe_close(errno_pipe_fd[1]);
+
+ r = operation_new(m, NULL, child, message, errno_pipe_fd[0], NULL);
+ if (r < 0) {
+ (void) sigkill_wait(child);
+ return r;
+ }
+
+ errno_pipe_fd[0] = -1;
+
+ return 1;
+}
+
+int bus_image_method_rename(
+ sd_bus_message *message,
+ void *userdata,
+ sd_bus_error *error) {
+
+ Image *image = userdata;
+ Manager *m = image->userdata;
+ const char *new_name;
+ int r;
+
+ assert(message);
+ assert(image);
+
+ r = sd_bus_message_read(message, "s", &new_name);
+ if (r < 0)
+ return r;
+
+ if (!image_name_is_valid(new_name))
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Image name '%s' is invalid.", new_name);
+
+ r = bus_verify_polkit_async(
+ message,
+ CAP_SYS_ADMIN,
+ "org.freedesktop.machine1.manage-images",
+ NULL,
+ false,
+ UID_INVALID,
+ &m->polkit_registry,
+ error);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return 1; /* Will call us back */
+
+ r = image_rename(image, new_name);
+ if (r < 0)
+ return r;
+
+ return sd_bus_reply_method_return(message, NULL);
+}
+
+int bus_image_method_clone(
+ sd_bus_message *message,
+ void *userdata,
+ sd_bus_error *error) {
+
+ _cleanup_close_pair_ int errno_pipe_fd[2] = { -1, -1 };
+ Image *image = userdata;
+ Manager *m = image->userdata;
+ const char *new_name;
+ int r, read_only;
+ pid_t child;
+
+ assert(message);
+ assert(image);
+ assert(m);
+
+ if (m->n_operations >= OPERATIONS_MAX)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Too many ongoing operations.");
+
+ r = sd_bus_message_read(message, "sb", &new_name, &read_only);
+ if (r < 0)
+ return r;
+
+ if (!image_name_is_valid(new_name))
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Image name '%s' is invalid.", new_name);
+
+ r = bus_verify_polkit_async(
+ message,
+ CAP_SYS_ADMIN,
+ "org.freedesktop.machine1.manage-images",
+ NULL,
+ false,
+ UID_INVALID,
+ &m->polkit_registry,
+ error);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return 1; /* Will call us back */
+
+ 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) {
+ errno_pipe_fd[0] = safe_close(errno_pipe_fd[0]);
+
+ r = image_clone(image, new_name, read_only);
+ if (r < 0) {
+ (void) write(errno_pipe_fd[1], &r, sizeof(r));
+ _exit(EXIT_FAILURE);
+ }
+
+ _exit(EXIT_SUCCESS);
+ }
+
+ errno_pipe_fd[1] = safe_close(errno_pipe_fd[1]);
+
+ r = operation_new(m, NULL, child, message, errno_pipe_fd[0], NULL);
+ if (r < 0) {
+ (void) sigkill_wait(child);
+ return r;
+ }
+
+ errno_pipe_fd[0] = -1;
+
+ return 1;
+}
+
+int bus_image_method_mark_read_only(
+ sd_bus_message *message,
+ void *userdata,
+ sd_bus_error *error) {
+
+ Image *image = userdata;
+ Manager *m = image->userdata;
+ int r, read_only;
+
+ assert(message);
+
+ r = sd_bus_message_read(message, "b", &read_only);
+ if (r < 0)
+ return r;
+
+ r = bus_verify_polkit_async(
+ message,
+ CAP_SYS_ADMIN,
+ "org.freedesktop.machine1.manage-images",
+ NULL,
+ false,
+ UID_INVALID,
+ &m->polkit_registry,
+ error);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return 1; /* Will call us back */
+
+ r = image_read_only(image, read_only);
+ if (r < 0)
+ return r;
+
+ return sd_bus_reply_method_return(message, NULL);
+}
+
+int bus_image_method_set_limit(
+ sd_bus_message *message,
+ void *userdata,
+ sd_bus_error *error) {
+
+ Image *image = userdata;
+ Manager *m = image->userdata;
+ uint64_t limit;
+ int r;
+
+ assert(message);
+
+ r = sd_bus_message_read(message, "t", &limit);
+ if (r < 0)
+ return r;
+ if (!FILE_SIZE_VALID_OR_INFINITY(limit))
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "New limit out of range");
+
+ r = bus_verify_polkit_async(
+ message,
+ CAP_SYS_ADMIN,
+ "org.freedesktop.machine1.manage-images",
+ NULL,
+ false,
+ UID_INVALID,
+ &m->polkit_registry,
+ error);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return 1; /* Will call us back */
+
+ r = image_set_limit(image, limit);
+ if (r < 0)
+ return r;
+
+ return sd_bus_reply_method_return(message, NULL);
+}
+
+const sd_bus_vtable image_vtable[] = {
+ SD_BUS_VTABLE_START(0),
+ SD_BUS_PROPERTY("Name", "s", NULL, offsetof(Image, name), 0),
+ SD_BUS_PROPERTY("Path", "s", NULL, offsetof(Image, path), 0),
+ SD_BUS_PROPERTY("Type", "s", property_get_type, offsetof(Image, type), 0),
+ SD_BUS_PROPERTY("ReadOnly", "b", bus_property_get_bool, offsetof(Image, read_only), 0),
+ SD_BUS_PROPERTY("CreationTimestamp", "t", NULL, offsetof(Image, crtime), 0),
+ SD_BUS_PROPERTY("ModificationTimestamp", "t", NULL, offsetof(Image, mtime), 0),
+ SD_BUS_PROPERTY("Usage", "t", NULL, offsetof(Image, usage), 0),
+ SD_BUS_PROPERTY("Limit", "t", NULL, offsetof(Image, limit), 0),
+ SD_BUS_PROPERTY("UsageExclusive", "t", NULL, offsetof(Image, usage_exclusive), 0),
+ SD_BUS_PROPERTY("LimitExclusive", "t", NULL, offsetof(Image, limit_exclusive), 0),
+ SD_BUS_METHOD("Remove", NULL, NULL, bus_image_method_remove, SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD("Rename", "s", NULL, bus_image_method_rename, SD_BUS_VTABLE_UNPRIVILEGED),
+ 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_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);
+
+ return 0;
+}
+
+int image_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
+ _cleanup_free_ char *e = NULL;
+ Manager *m = userdata;
+ Image *image = NULL;
+ const char *p;
+ int r;
+
+ assert(bus);
+ assert(path);
+ assert(interface);
+ assert(found);
+
+ p = startswith(path, "/org/freedesktop/machine1/image/");
+ if (!p)
+ return 0;
+
+ e = bus_label_unescape(p);
+ if (!e)
+ return -ENOMEM;
+
+ image = hashmap_get(m->image_cache, e);
+ if (image) {
+ *found = image;
+ return 1;
+ }
+
+ r = hashmap_ensure_allocated(&m->image_cache, &string_hash_ops);
+ if (r < 0)
+ return r;
+
+ if (!m->image_cache_defer_event) {
+ r = sd_event_add_defer(m->event, &m->image_cache_defer_event, image_flush_cache, m);
+ if (r < 0)
+ return r;
+
+ r = sd_event_source_set_priority(m->image_cache_defer_event, SD_EVENT_PRIORITY_IDLE);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_event_source_set_enabled(m->image_cache_defer_event, SD_EVENT_ONESHOT);
+ if (r < 0)
+ return r;
+
+ r = image_find(e, &image);
+ if (r <= 0)
+ return r;
+
+ image->userdata = m;
+
+ r = hashmap_put(m->image_cache, image->name, image);
+ if (r < 0) {
+ image_unref(image);
+ return r;
+ }
+
+ *found = image;
+ return 1;
+}
+
+char *image_bus_path(const char *name) {
+ _cleanup_free_ char *e = NULL;
+
+ assert(name);
+
+ e = bus_label_escape(name);
+ if (!e)
+ return NULL;
+
+ return strappend("/org/freedesktop/machine1/image/", e);
+}
+
+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_strv_free_ char **l = NULL;
+ Image *image;
+ Iterator i;
+ int r;
+
+ assert(bus);
+ assert(path);
+ assert(nodes);
+
+ images = hashmap_new(&string_hash_ops);
+ if (!images)
+ return -ENOMEM;
+
+ r = image_discover(images);
+ if (r < 0)
+ return r;
+
+ HASHMAP_FOREACH(image, images, i) {
+ char *p;
+
+ p = image_bus_path(image->name);
+ if (!p)
+ return -ENOMEM;
+
+ r = strv_consume(&l, p);
+ if (r < 0)
+ return r;
+ }
+
+ *nodes = l;
+ l = NULL;
+
+ return 1;
+}
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