Date: Sun, 22 Apr 2012 16:13:23 +0000 (UTC) From: "Alexander V. Chernikov" <melifaro@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r234572 - head/sys/net Message-ID: <201204221613.q3MGDNcj047130@svn.freebsd.org>
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Author: melifaro Date: Sun Apr 22 16:13:23 2012 New Revision: 234572 URL: http://svn.freebsd.org/changeset/base/234572 Log: Do not require radix write lock to be held while dumping route table via sysctl(4) interface. This permits router not to stop forwarding packets while route table is being written to user-supplied buffer. Reported by: Pawel Tyll <ptyll@nitronet.pl> Approved by: kib(mentor) MFC after: 1 week Modified: head/sys/net/rtsock.c Modified: head/sys/net/rtsock.c ============================================================================== --- head/sys/net/rtsock.c Sun Apr 22 09:19:19 2012 (r234571) +++ head/sys/net/rtsock.c Sun Apr 22 16:13:23 2012 (r234572) @@ -1884,10 +1884,10 @@ sysctl_rtsock(SYSCTL_HANDLER_ARGS) for (error = 0; error == 0 && i <= lim; i++) { rnh = rt_tables_get_rnh(req->td->td_proc->p_fibnum, i); if (rnh != NULL) { - RADIX_NODE_HEAD_LOCK(rnh); + RADIX_NODE_HEAD_RLOCK(rnh); error = rnh->rnh_walktree(rnh, sysctl_dumpentry, &w); - RADIX_NODE_HEAD_UNLOCK(rnh); + RADIX_NODE_HEAD_RUNLOCK(rnh); } else if (af != 0) error = EAFNOSUPPORT; }help
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