Date: Thu, 8 Mar 2001 08:04:57 +0100 (CET) From: Blaz Zupan <blaz@amis.net> To: <hackers@freebsd.org> Subject: PATCH: workaround for FreeBSD 4.2-STABLE (fwd) Message-ID: <Pine.BSF.4.33.0103080804200.61740-100000@titanic.medinet.si>
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Anybody know which bug Wietse is talking about?
Blaz Zupan, Medinet d.o.o, Linhartova 21, 2000 Maribor, Slovenia
E-mail: blaz@amis.net, Tel: +386-2-320-6320, Fax: +386-2-320-6325
---------- Forwarded message ----------
Date: Wed, 7 Mar 2001 10:49:52 -0500 (EST)
From: Wietse Venema <wietse@porcupine.org>
To: Postfix users <postfix-users@postfix.org>
Subject: PATCH: workaround for FreeBSD 4.2-STABLE
This is an UNTESTED workaround for an incompatible change in FreeBSD
4.2-STABLE that causes data to be lost when a client close()s a
socket before the server has accept()ed the connection. This screws
up the Postfix flush service, and may make some parts of Postfix
fail randomly under a heavy system load.
The UNTESTED workaround causes the client to wait until the server
closes the connection first. This makes Postfix slower than necessary.
The workaround is UNTESTED because I have no time to download and
install FreeBSD 4.2-STABLE.
To compile this UNTESTED workaround:
[ apply patch ]
% make makefiles CCARGS=-DBROKEN_FREEBSD_ACCEPT
% make
% su
[ type your root password here ]
# make install </dev/null
Someone can tell the list if this UNTESTED workaround actually works.
Wietse
*** ./unix_trigger.c- Sun Mar 21 20:42:20 1999
--- ./unix_trigger.c Wed Mar 7 10:40:29 2001
***************
*** 79,84 ****
--- 79,90 ----
if (msg_verbose)
msg_warn("%s: write to %s: %m", myname, service);
+ #ifdef BROKEN_FREEBSD_ACCEPT
+ if (shutdown(fd, 1) < 0)
+ msg_fatal("shutdown: %m");
+ read_wait(fd, -1);
+ #endif
+
/*
* Disconnect.
*/
*** ./inet_trigger.c- Fri Dec 11 13:55:36 1998
--- ./inet_trigger.c Wed Mar 7 10:39:53 2001
***************
*** 81,86 ****
--- 81,92 ----
if (msg_verbose)
msg_warn("%s: write to %s: %m", myname, service);
+ #ifdef BROKEN_FREEBSD_ACCEPT
+ if (shutdown(fd, 1) < 0)
+ msg_fatal("shutdown: %m");
+ read_wait(fd, -1);
+ #endif
+
/*
* Disconnect.
*/
*** ./sane_accept.c- Sun Mar 21 20:25:52 1999
--- ./sane_accept.c Wed Mar 7 10:32:59 2001
***************
*** 53,58 ****
--- 53,61 ----
ENETUNREACH,
ENOTCONN,
EWOULDBLOCK,
+ #ifdef BROKEN_FREEBSD_ACCEPT
+ ECONNABORTED,
+ #endif
0,
};
int count;
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