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authorTom Gundersen <teg@jklm.no>2015-06-02 21:03:36 +0200
committerTom Gundersen <teg@jklm.no>2015-06-03 02:01:46 +0200
commitf59118ec7911730bb79b273bb4034f5eb4c80868 (patch)
tree93bb782c20183949cec344b07341448f18a3b0ab /src/udev/udevd.c
parent44daf75d985683190255e9cf7eb2eea0f370be02 (diff)
udevd: unify fd handling in forking/notify modes
Hide the differenec in listen_fds, by simply opening the fds here in case they are not passed in.
Diffstat (limited to 'src/udev/udevd.c')
-rw-r--r--src/udev/udevd.c95
1 files changed, 60 insertions, 35 deletions
diff --git a/src/udev/udevd.c b/src/udev/udevd.c
index 121491753a..259767b3f6 100644
--- a/src/udev/udevd.c
+++ b/src/udev/udevd.c
@@ -1262,8 +1262,9 @@ static int on_post(sd_event_source *s, void *userdata) {
}
static int listen_fds(int *rctrl, int *rnetlink) {
+ _cleanup_udev_unref_ struct udev *udev = NULL;
int ctrl_fd = -1, netlink_fd = -1;
- int fd, n;
+ int fd, n, r;
assert(rctrl);
assert(rnetlink);
@@ -1290,10 +1291,57 @@ static int listen_fds(int *rctrl, int *rnetlink) {
return -EINVAL;
}
- if (ctrl_fd < 0 || netlink_fd < 0)
- return -EINVAL;
+ if (ctrl_fd < 0) {
+ _cleanup_udev_ctrl_unref_ struct udev_ctrl *ctrl = NULL;
+
+ udev = udev_new();
+ if (!udev)
+ return -ENOMEM;
+
+ ctrl = udev_ctrl_new(udev);
+ if (!ctrl)
+ return log_error_errno(EINVAL, "error initializing udev control socket");
+
+ r = udev_ctrl_enable_receiving(ctrl);
+ if (r < 0)
+ return log_error_errno(EINVAL, "error binding udev control socket");
+
+ fd = udev_ctrl_get_fd(ctrl);
+ if (fd < 0)
+ return log_error_errno(EIO, "could not get ctrl fd");
- log_debug("ctrl=%i netlink=%i", ctrl_fd, netlink_fd);
+ ctrl_fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
+ if (ctrl_fd < 0)
+ return log_error_errno(errno, "could not dup ctrl fd: %m");
+ }
+
+ if (netlink_fd < 0) {
+ _cleanup_udev_monitor_unref_ struct udev_monitor *monitor = NULL;
+
+ if (!udev) {
+ udev = udev_new();
+ if (!udev)
+ return -ENOMEM;
+ }
+
+ monitor = udev_monitor_new_from_netlink(udev, "kernel");
+ if (!monitor)
+ return log_error_errno(EINVAL, "error initializing netlink socket");
+
+ (void) udev_monitor_set_receive_buffer_size(monitor, 128 * 1024 * 1024);
+
+ r = udev_monitor_enable_receiving(monitor);
+ if (r < 0)
+ return log_error_errno(EINVAL, "error binding netlink socket");
+
+ fd = udev_monitor_get_fd(monitor);
+ if (fd < 0)
+ return log_error_errno(netlink_fd, "could not get uevent fd: %m");
+
+ netlink_fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
+ if (ctrl_fd < 0)
+ return log_error_errno(errno, "could not dup netlink fd: %m");
+ }
*rctrl = ctrl_fd;
*rnetlink = netlink_fd;
@@ -1472,39 +1520,16 @@ static int manager_new(Manager **ret, const char *cgroup) {
manager->cgroup = cgroup;
r = listen_fds(&fd_ctrl, &fd_uevent);
- if (r >= 0) {
- /* get control and netlink socket from systemd */
- manager->ctrl = udev_ctrl_new_from_fd(manager->udev, fd_ctrl);
- if (!manager->ctrl)
- return log_error_errno(EINVAL, "error taking over udev control socket");
-
- manager->monitor = udev_monitor_new_from_netlink_fd(manager->udev, "kernel", fd_uevent);
- if (!manager->monitor)
- return log_error_errno(EINVAL, "error taking over netlink socket");
- } else {
- /* open control and netlink socket */
- manager->ctrl = udev_ctrl_new(manager->udev);
- if (!manager->ctrl)
- return log_error_errno(EINVAL, "error initializing udev control socket");
-
- fd_ctrl = udev_ctrl_get_fd(manager->ctrl);
-
- manager->monitor = udev_monitor_new_from_netlink(manager->udev, "kernel");
- if (!manager->monitor)
- return log_error_errno(EINVAL, "error initializing netlink socket");
-
- fd_uevent = udev_monitor_get_fd(manager->monitor);
-
- (void) udev_monitor_set_receive_buffer_size(manager->monitor, 128 * 1024 * 1024);
+ if (r < 0)
+ return log_error_errno(r, "could not listen on fds: %m");
- r = udev_monitor_enable_receiving(manager->monitor);
- if (r < 0)
- return log_error_errno(EINVAL, "error binding netlink socket");
+ manager->ctrl = udev_ctrl_new_from_fd(manager->udev, fd_ctrl);
+ if (!manager->ctrl)
+ return log_error_errno(EINVAL, "error taking over udev control socket");
- r = udev_ctrl_enable_receiving(manager->ctrl);
- if (r < 0)
- return log_error_errno(EINVAL, "error binding udev control socket");
- }
+ manager->monitor = udev_monitor_new_from_netlink_fd(manager->udev, "kernel", fd_uevent);
+ if (!manager->monitor)
+ return log_error_errno(EINVAL, "error taking over netlink socket");
*ret = manager;
manager = NULL;