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 <pt...@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;
}
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