Author: glebius
Date: Wed Jan 15 03:35:57 2020
New Revision: 356749
URL: https://svnweb.freebsd.org/changeset/base/356749
Log:
Netgraph queue processing thread must process all its items
in the network epoch.
Reported by: Michael Zhilin <mizhka@ >
Modified:
head/sys/netgraph/ng_base.c
Modified: head/sys/netgraph/ng_base.c
==============================================================================
--- head/sys/netgraph/ng_base.c Wed Jan 15 03:34:21 2020 (r356748)
+++ head/sys/netgraph/ng_base.c Wed Jan 15 03:35:57 2020 (r356749)
@@ -55,6 +55,7 @@
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/proc.h>
+#include <sys/epoch.h>
#include <sys/queue.h>
#include <sys/refcount.h>
#include <sys/rwlock.h>
@@ -3398,6 +3399,7 @@ static void
ngthread(void *arg)
{
for (;;) {
+ struct epoch_tracker et;
node_p node;
/* Get node from the worklist. */
@@ -3418,6 +3420,7 @@ ngthread(void *arg)
* that lets us be sure that the node still exists.
* Let the reference go at the last minute.
*/
+ NET_EPOCH_ENTER(et);
for (;;) {
item_p item;
int rw;
@@ -3435,6 +3438,7 @@ ngthread(void *arg)
NG_NODE_UNREF(node);
}
}
+ NET_EPOCH_EXIT(et);
NG_NODE_UNREF(node);
CURVNET_RESTORE();
}
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