41 lines
2.4 KiB
Diff
41 lines
2.4 KiB
Diff
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From bf589755bd5b084f1b5dd099ea3e4917ac9911fd Mon Sep 17 00:00:00 2001
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From: huangkaibin <huangkaibin@huawei.com>
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Date: Thu, 14 Sep 2017 12:54:01 +0800
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Subject: [PATCH] systemd-core: fix problem of dbus service can not be started
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when dbus is dead and state of system dbus of systemd stay in
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BUS_AUTHENTICATING.
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When systemd starts a dbus communication, it will first authenticate the bus by communicating with polkitd service, and then enter running state.
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But if authenticating can not be establised within 25s(default timeout seconds) since authenticating starts
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(maybe caused by polkitd service or dbus service can not be activated in time), the dbus state in systemd side will stays in BUS_AUTHENTICATING state,
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and systemd will enter a mad state that it will handle authenticating(in bus_process_internal function) very frequently and will have no any change to
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service for events of restarting services(by systemctl restart dbus.service --no-ask-password --no-block). So that the dbus service will never be restarted successfully.
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systemd will enter such a state is caused by the timeout setting in sd_bus_get_timeout function. When in BUS_AUTHENTICATING state, the timeout is set
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to a fix value of bus->auth_timeout(authenticating start time + 25s), if auth_timeout is an expired time, but not a furture time, systemd will always service
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for the callback of function of dbus(time_callback) with no any delay when it got its chance, and leave no chance for events of restarting services.
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This patch fix this problem by fixing the timeout to a furture time when bus->auth_timeout is expired.
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---
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src/libsystemd/sd-bus/sd-bus.c | 6 +++++-
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1 file changed, 5 insertions(+), 1 deletion(-)
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diff --git a/src/libsystemd/sd-bus/sd-bus.c b/src/libsystemd/sd-bus/sd-bus.c
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index b0a3237..ca626d3 100644
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--- a/src/libsystemd/sd-bus/sd-bus.c
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+++ b/src/libsystemd/sd-bus/sd-bus.c
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@@ -2267,7 +2267,11 @@ _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) {
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switch (bus->state) {
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case BUS_AUTHENTICATING:
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- *timeout_usec = bus->auth_timeout;
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+ //delay 1 second to ensure it is a furture time but not an expired time
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+ if(bus->auth_timeout <= now(CLOCK_MONOTONIC))
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+ *timeout_usec = now(CLOCK_MONOTONIC) + USEC_PER_SEC;
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+ else
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+ *timeout_usec = bus->auth_timeout;
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return 1;
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case BUS_RUNNING:
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--
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1.8.3.1
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