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From fef242735b987c1870bcd0460cc0c802e78a3cde Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Mon, 2 Jan 2023 17:25:46 +0100
Subject: [PATCH] networkd: implement Type=notify-reload protocol
(cherry picked from commit 0e07cdb0e77d0322bc866b5e13abbe38e988059d)
Related: RHEL-6090
---
src/network/networkd-manager-bus.c | 13 +-------
src/network/networkd-manager.c | 48 ++++++++++++++++++++++++++----
src/network/networkd-manager.h | 2 ++
src/network/networkd.c | 2 --
units/systemd-networkd.service.in | 3 +-
5 files changed, 47 insertions(+), 21 deletions(-)
diff --git a/src/network/networkd-manager-bus.c b/src/network/networkd-manager-bus.c
index 2ab3aaadc2..67f951df69 100644
--- a/src/network/networkd-manager-bus.c
+++ b/src/network/networkd-manager-bus.c
@@ -197,7 +197,6 @@ static int bus_method_reconfigure_link(sd_bus_message *message, void *userdata,
static int bus_method_reload(sd_bus_message *message, void *userdata, sd_bus_error *error) {
Manager *manager = userdata;
- Link *link;
int r;
r = bus_verify_polkit_async(message, CAP_NET_ADMIN,
@@ -209,20 +208,10 @@ static int bus_method_reload(sd_bus_message *message, void *userdata, sd_bus_err
if (r == 0)
return 1; /* Polkit will call us back */
- r = netdev_load(manager, true);
+ r = manager_reload(manager);
if (r < 0)
return r;
- r = network_reload(manager);
- if (r < 0)
- return r;
-
- HASHMAP_FOREACH(link, manager->links_by_index) {
- r = link_reconfigure(link, /* force = */ false);
- if (r < 0)
- return r;
- }
-
return sd_bus_reply_method_return(message, NULL);
}
diff --git a/src/network/networkd-manager.c b/src/network/networkd-manager.c
index cdfd29bc0e..362ee84b09 100644
--- a/src/network/networkd-manager.c
+++ b/src/network/networkd-manager.c
@@ -483,6 +483,14 @@ static int signal_restart_callback(sd_event_source *s, const struct signalfd_sig
return sd_event_exit(sd_event_source_get_event(s), 0);
}
+static int signal_reload_callback(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
+ Manager *m = ASSERT_PTR(userdata);
+
+ manager_reload(m);
+
+ return 0;
+}
+
static int manager_set_keep_configuration(Manager *m) {
int r;
@@ -517,12 +525,11 @@ int manager_setup(Manager *m) {
if (r < 0)
return r;
- assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGINT, SIGTERM, SIGUSR2, -1) >= 0);
-
(void) sd_event_set_watchdog(m->event, true);
- (void) sd_event_add_signal(m->event, NULL, SIGTERM, signal_terminate_callback, m);
- (void) sd_event_add_signal(m->event, NULL, SIGINT, signal_terminate_callback, m);
- (void) sd_event_add_signal(m->event, NULL, SIGUSR2, signal_restart_callback, m);
+ (void) sd_event_add_signal(m->event, NULL, SIGTERM | SD_EVENT_SIGNAL_PROCMASK, signal_terminate_callback, m);
+ (void) sd_event_add_signal(m->event, NULL, SIGINT | SD_EVENT_SIGNAL_PROCMASK, signal_terminate_callback, m);
+ (void) sd_event_add_signal(m->event, NULL, SIGUSR2 | SD_EVENT_SIGNAL_PROCMASK, signal_restart_callback, m);
+ (void) sd_event_add_signal(m->event, NULL, SIGHUP | SD_EVENT_SIGNAL_PROCMASK, signal_reload_callback, m);
r = sd_event_add_post(m->event, NULL, manager_dirty_handler, m);
if (r < 0)
@@ -1078,3 +1085,34 @@ int manager_set_timezone(Manager *m, const char *tz) {
return 0;
}
+
+int manager_reload(Manager *m) {
+ Link *link;
+ int r;
+
+ assert(m);
+
+ (void) sd_notifyf(/* unset= */ false,
+ "RELOADING=1\n"
+ "STATUS=Reloading configuration...\n"
+ "MONOTONIC_USEC=" USEC_FMT, now(CLOCK_MONOTONIC));
+
+ r = netdev_load(m, /* reload= */ true);
+ if (r < 0)
+ goto finish;
+
+ r = network_reload(m);
+ if (r < 0)
+ goto finish;
+
+ HASHMAP_FOREACH(link, m->links_by_index) {
+ r = link_reconfigure(link, /* force = */ false);
+ if (r < 0)
+ goto finish;
+ }
+
+ r = 0;
+finish:
+ (void) sd_notify(/* unset= */ false, NOTIFY_READY);
+ return r;
+}
diff --git a/src/network/networkd-manager.h b/src/network/networkd-manager.h
index 40e6092f85..e6183af0e4 100644
--- a/src/network/networkd-manager.h
+++ b/src/network/networkd-manager.h
@@ -115,4 +115,6 @@ int manager_enumerate(Manager *m);
int manager_set_hostname(Manager *m, const char *hostname);
int manager_set_timezone(Manager *m, const char *timezone);
+int manager_reload(Manager *m);
+
DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
diff --git a/src/network/networkd.c b/src/network/networkd.c
index d61769d9f3..68760e8ff4 100644
--- a/src/network/networkd.c
+++ b/src/network/networkd.c
@@ -81,8 +81,6 @@ static int run(int argc, char *argv[]) {
if (r < 0)
log_warning_errno(r, "Could not create runtime directory 'lldp': %m");
- assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
-
r = manager_new(&m, /* test_mode = */ false);
if (r < 0)
return log_error_errno(r, "Could not create manager: %m");
diff --git a/units/systemd-networkd.service.in b/units/systemd-networkd.service.in
index d15129e7f0..d8b935a358 100644
--- a/units/systemd-networkd.service.in
+++ b/units/systemd-networkd.service.in
@@ -24,7 +24,6 @@ BusName=org.freedesktop.network1
CapabilityBoundingSet=CAP_NET_ADMIN CAP_NET_BIND_SERVICE CAP_NET_BROADCAST CAP_NET_RAW
DeviceAllow=char-* rw
ExecStart=!!{{ROOTLIBEXECDIR}}/systemd-networkd
-ExecReload=networkctl reload
FileDescriptorStoreMax=512
LockPersonality=yes
MemoryDenyWriteExecute=yes
@@ -48,7 +47,7 @@ RuntimeDirectoryPreserve=yes
SystemCallArchitectures=native
SystemCallErrorNumber=EPERM
SystemCallFilter=@system-service
-Type=notify
+Type=notify-reload
User=systemd-network
{{SERVICE_WATCHDOG}}
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