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udev: move listen_fds() to udev-manager.c

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Also
- drop redundant error message when manager_init() failed,
- close unexpected fds.

No functional change, just refactoring.
This commit is contained in:
Yu Watanabe 2024-12-04 05:02:53 +09:00
parent 7ab25935f3
commit a2840b9599
3 changed files with 59 additions and 45 deletions
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57
src/udev/udev-manager.c
View File

@ -1227,15 +1227,69 @@ void manager_adjust_arguments(Manager *manager) {
}
}
int manager_init(Manager *manager, int fd_ctrl, int fd_uevent) {
static int listen_fds(int *ret_ctrl, int *ret_netlink) {
_cleanup_strv_free_ char **names = NULL;
_cleanup_close_ int ctrl_fd = -EBADF, netlink_fd = -EBADF;
assert(ret_ctrl);
assert(ret_netlink);
int n = sd_listen_fds_with_names(/* unset_environment = */ true, &names);
if (n < 0)
return n;
if (strv_length(names) != (size_t) n)
return -EIO;
for (int i = 0; i < n; i++) {
int fd = SD_LISTEN_FDS_START + i;
if (sd_is_socket(fd, AF_UNIX, SOCK_SEQPACKET, -1) > 0) {
if (ctrl_fd >= 0) {
log_debug("Received multiple seqpacket socket (%s), ignoring.", names[i]);
goto unused;
}
ctrl_fd = fd;
continue;
}
if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) {
if (netlink_fd >= 0) {
log_debug("Received multiple netlink socket (%s), ignoring.", names[i]);
goto unused;
}
netlink_fd = fd;
continue;
}
log_debug("Received unexpected fd (%s), ignoring.", names[i]);
unused:
close_and_notify_warn(fd, names[i]);
}
*ret_ctrl = TAKE_FD(ctrl_fd);
*ret_netlink = TAKE_FD(netlink_fd);
return 0;
}
int manager_init(Manager *manager) {
_cleanup_close_ int fd_ctrl = -EBADF, fd_uevent = -EBADF;
_cleanup_free_ char *cgroup = NULL;
int r;
assert(manager);
r = listen_fds(&fd_ctrl, &fd_uevent);
if (r < 0)
return log_error_errno(r, "Failed to listen on fds: %m");
r = udev_ctrl_new_from_fd(&manager->ctrl, fd_ctrl);
if (r < 0)
return log_error_errno(r, "Failed to initialize udev control socket: %m");
TAKE_FD(fd_ctrl);
r = udev_ctrl_enable_receiving(manager->ctrl);
if (r < 0)
@ -1244,6 +1298,7 @@ int manager_init(Manager *manager, int fd_ctrl, int fd_uevent) {
r = device_monitor_new_full(&manager->monitor, MONITOR_GROUP_KERNEL, fd_uevent);
if (r < 0)
return log_error_errno(r, "Failed to initialize device monitor: %m");
TAKE_FD(fd_uevent);
(void) sd_device_monitor_set_description(manager->monitor, "manager");

2
src/udev/udev-manager.h
View File

@ -53,7 +53,7 @@ Manager* manager_free(Manager *manager);
DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
void manager_adjust_arguments(Manager *manager);
int manager_init(Manager *manager, int fd_ctrl, int fd_uevent);
int manager_init(Manager *manager);
int manager_main(Manager *manager);
bool devpath_conflict(const char *a, const char *b);

45
src/udev/udevd.c
View File

@ -8,8 +8,6 @@
#include <getopt.h>
#include <unistd.h>
#include "sd-daemon.h"
#include "conf-parser.h"
#include "env-file.h"
#include "errno-util.h"
@ -31,40 +29,6 @@
static bool arg_debug = false;
static int arg_daemonize = false;
static int listen_fds(int *ret_ctrl, int *ret_netlink) {
int ctrl_fd = -EBADF, netlink_fd = -EBADF;
assert(ret_ctrl);
assert(ret_netlink);
int n = sd_listen_fds(true);
if (n < 0)
return n;
for (int fd = SD_LISTEN_FDS_START; fd < n + SD_LISTEN_FDS_START; fd++) {
if (sd_is_socket(fd, AF_UNIX, SOCK_SEQPACKET, -1) > 0) {
if (ctrl_fd >= 0)
return -EINVAL;
ctrl_fd = fd;
continue;
}
if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) {
if (netlink_fd >= 0)
return -EINVAL;
netlink_fd = fd;
continue;
}
return -EINVAL;
}
*ret_ctrl = ctrl_fd;
*ret_netlink = netlink_fd;
return 0;
}
static DEFINE_CONFIG_PARSE_ENUM(config_parse_resolve_name_timing, resolve_name_timing, ResolveNameTiming);
static int manager_parse_udev_config(Manager *manager) {
@ -286,7 +250,6 @@ static int parse_argv(int argc, char *argv[], Manager *manager) {
int run_udevd(int argc, char *argv[]) {
_cleanup_(manager_freep) Manager *manager = NULL;
int fd_ctrl = -EBADF, fd_uevent = -EBADF;
int r;
log_setup();
@ -330,13 +293,9 @@ int run_udevd(int argc, char *argv[]) {
if (r < 0 && r != -EEXIST)
return log_error_errno(r, "Failed to create /run/udev: %m");
r = listen_fds(&fd_ctrl, &fd_uevent);
r = manager_init(manager);
if (r < 0)
return log_error_errno(r, "Failed to listen on fds: %m");
r = manager_init(manager, fd_ctrl, fd_uevent);
if (r < 0)
return log_error_errno(r, "Failed to create manager: %m");
return r;
if (arg_daemonize) {
pid_t pid;