58 lines
2.0 KiB
Diff
58 lines
2.0 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Martin Wilck <mwilck@suse.com>
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Date: Wed, 21 Mar 2018 10:34:19 +0100
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Subject: [PATCH] multipathd: handle errors in uxlsnr as fatal
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The ppoll() calls of the uxlsnr thread are vital for proper functioning of
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multipathd. If the uxlsnr thread can't open the socket or fails to call ppoll()
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for other reasons, quit the daemon. If we don't do that, multipathd may
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hang in a state where it can't be terminated any more, because the uxlsnr
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thread is responsible for handling all signals. This happens e.g. if
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systemd's multipathd.socket is running in and multipathd is started from
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outside systemd.
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24f2844 "multipathd: fix signal blocking logic" has made this problem more
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severe. Before that patch, the signals weren't actually blocked in any thread.
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That's not to say 24f2844 was wrong. I still think it's correct, we just
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need this one on top.
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Signed-off-by: Martin Wilck <mwilck@suse.com>
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Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
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---
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multipathd/uxlsnr.c | 5 +++--
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1 file changed, 3 insertions(+), 2 deletions(-)
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diff --git a/multipathd/uxlsnr.c b/multipathd/uxlsnr.c
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index cdafd82..6f66666 100644
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--- a/multipathd/uxlsnr.c
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+++ b/multipathd/uxlsnr.c
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@@ -178,7 +178,7 @@ void * uxsock_listen(uxsock_trigger_fn uxsock_trigger, void * trigger_data)
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if (ux_sock == -1) {
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condlog(1, "could not create uxsock: %d", errno);
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- return NULL;
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+ exit_daemon();
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}
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pthread_cleanup_push(uxsock_cleanup, (void *)ux_sock);
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@@ -187,7 +187,7 @@ void * uxsock_listen(uxsock_trigger_fn uxsock_trigger, void * trigger_data)
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polls = (struct pollfd *)MALLOC((MIN_POLLS + 1) * sizeof(struct pollfd));
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if (!polls) {
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condlog(0, "uxsock: failed to allocate poll fds");
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- return NULL;
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+ exit_daemon();
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}
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sigfillset(&mask);
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sigdelset(&mask, SIGINT);
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@@ -249,6 +249,7 @@ void * uxsock_listen(uxsock_trigger_fn uxsock_trigger, void * trigger_data)
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/* something went badly wrong! */
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condlog(0, "uxsock: poll failed with %d", errno);
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+ exit_daemon();
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break;
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}
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--
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2.7.4
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