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Do not require radix write lock to be held while dumping route table

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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
This commit is contained in:
Alexander V. Chernikov 2012-04-22 16:13:23 +00:00
parent 4bcb1430a8
commit c2508034a2
1 changed files with 2 additions and 2 deletions
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4
sys/net/rtsock.c
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@ -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;
}