src/machine/machine-dbus.c \
src/machine/machine-dbus.h \
src/machine/image-dbus.c \
- src/machine/image-dbus.h
+ src/machine/image-dbus.h \
+ src/machine/operation.c \
+ src/machine/operation.h
libmachine_core_la_LIBADD = \
libshared.la
#include "alloc-util.h"
#include "bus-label.h"
#include "bus-util.h"
+#include "fd-util.h"
#include "image-dbus.h"
#include "io-util.h"
#include "machine-image.h"
+#include "process-util.h"
#include "strv.h"
#include "user-util.h"
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)
if (r == 0)
return 1; /* Will call us back */
- r = image_clone(image, new_name, read_only);
- if (r == -EOPNOTSUPP)
- return sd_bus_reply_method_errnof(message, r, "Image cloning is currently only supported on btrfs file systems.");
- if (r < 0)
+ 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, child, message, errno_pipe_fd[0]);
+ if (r < 0) {
+ (void) sigkill_wait(&child);
return r;
+ }
- return sd_bus_reply_method_return(message, NULL);
+ errno_pipe_fd[0] = -1;
+
+ return 1;
}
int bus_image_method_mark_read_only(
assert(m);
+ while (m->operations)
+ operation_free(m->operations);
+
+ assert(m->n_operations == 0);
+
while ((machine = hashmap_first(m->machines)))
machine_free(machine);
static bool check_idle(void *userdata) {
Manager *m = userdata;
+ if (m->operations)
+ return false;
+
manager_gc(m, true);
return hashmap_isempty(m->machines);
#include "image-dbus.h"
#include "machine-dbus.h"
#include "machine.h"
+#include "operation.h"
struct Manager {
sd_event *event;
LIST_HEAD(Machine, machine_gc_queue);
Machine *host_machine;
+
+ LIST_HEAD(Operation, operations);
+ unsigned n_operations;
};
Manager *manager_new(void);
--- /dev/null
+/***
+ This file is part of systemd.
+
+ Copyright 2016 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 "alloc-util.h"
+#include "fd-util.h"
+#include "operation.h"
+#include "process-util.h"
+
+static int operation_done(sd_event_source *s, const siginfo_t *si, void *userdata) {
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ Operation *o = userdata;
+ int r;
+
+ assert(o);
+ assert(si);
+
+ log_debug("Operating " PID_FMT " is now complete with with code=%s status=%i",
+ o->pid,
+ sigchld_code_to_string(si->si_code), si->si_status);
+
+ o->pid = 0;
+
+ if (si->si_code != CLD_EXITED) {
+ r = sd_bus_error_setf(&error, SD_BUS_ERROR_FAILED, "Child died abnormally.");
+ goto fail;
+ }
+
+ if (si->si_status != EXIT_SUCCESS) {
+ if (read(o->errno_fd, &r, sizeof(r)) == sizeof(r))
+ r = sd_bus_error_set_errnof(&error, r, "%m");
+ else
+ r = sd_bus_error_setf(&error, SD_BUS_ERROR_FAILED, "Child failed.");
+
+ goto fail;
+ }
+
+ r = sd_bus_reply_method_return(o->message, NULL);
+ if (r < 0)
+ log_error_errno(r, "Failed to reply to message: %m");
+
+ operation_free(o);
+ return 0;
+
+fail:
+ r = sd_bus_reply_method_error(o->message, &error);
+ if (r < 0)
+ log_error_errno(r, "Failed to reply to message: %m");
+
+ operation_free(o);
+ return 0;
+}
+
+int operation_new(Manager *m, pid_t child, sd_bus_message *message, int errno_fd) {
+ Operation *o;
+ int r;
+
+ o = new0(Operation, 1);
+ if (!o)
+ return -ENOMEM;
+
+ r = sd_event_add_child(m->event, &o->event_source, child, WEXITED, operation_done, o);
+ if (r < 0) {
+ free(o);
+ return r;
+ }
+
+ o->pid = child;
+ o->message = sd_bus_message_ref(message);
+ o->errno_fd = errno_fd;
+
+ LIST_PREPEND(operations, m->operations, o);
+ m->n_operations++;
+ o->manager = m;
+
+ log_debug("Started new operation " PID_FMT ".", child);
+
+ /* At this point we took ownership of both the child and the errno file descriptor! */
+
+ return 0;
+}
+
+Operation *operation_free(Operation *o) {
+ if (!o)
+ return NULL;
+
+ sd_event_source_unref(o->event_source);
+
+ safe_close(o->errno_fd);
+
+ if (o->pid > 1)
+ (void) sigkill_wait(&o->pid);
+
+ sd_bus_message_unref(o->message);
+
+ if (o->manager) {
+ LIST_REMOVE(operations, o->manager->operations, o);
+ o->manager->n_operations--;
+ }
+
+ free(o);
+ return NULL;
+}
--- /dev/null
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2016 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/types.h>
+
+#include "sd-bus.h"
+#include "sd-event.h"
+
+#include "list.h"
+
+typedef struct Operation Operation;
+
+#include "machined.h"
+
+#define OPERATIONS_MAX 64
+
+struct Operation {
+ Manager *manager;
+ pid_t pid;
+ sd_bus_message *message;
+ int errno_fd;
+ sd_event_source *event_source;
+ LIST_FIELDS(Operation, operations);
+};
+
+int operation_new(Manager *m, pid_t child, sd_bus_message *message, int errno_fd);
+Operation *operation_free(Operation *o);
projects / thirdparty / systemd.git / commitdiff
