Module Name: src
Committed By: riastradh
Date: Fri Aug 21 07:05:25 UTC 2020
Modified Files:
src/sys/net: if_wg.c
Log Message:
Ifdef out fast path that relies on atomic 64-bit load/store.
(Really this sliding window business could probably be done with
32-bit sequence numbers and careful detection of wraparound, but
that's a little more effort to work out -- let's just unbreak the
builds for now.)
To generate a diff of this commit:
cvs rdiff -u -r1.19 -r1.20 src/sys/net/if_wg.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/net/if_wg.c
diff -u src/sys/net/if_wg.c:1.19 src/sys/net/if_wg.c:1.20
--- src/sys/net/if_wg.c:1.19 Thu Aug 20 21:36:21 2020
+++ src/sys/net/if_wg.c Fri Aug 21 07:05:25 2020
@@ -1,4 +1,4 @@
-/* $NetBSD: if_wg.c,v 1.19 2020/08/20 21:36:21 riastradh Exp $ */
+/* $NetBSD: if_wg.c,v 1.20 2020/08/21 07:05:25 riastradh Exp $ */
/*
* Copyright (C) Ryota Ozaki <[email protected]>
@@ -43,7 +43,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_wg.c,v 1.19 2020/08/20 21:36:21 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_wg.c,v 1.20 2020/08/21 07:05:25 riastradh Exp $");
#ifdef _KERNEL_OPT
#include "opt_inet.h"
@@ -372,8 +372,10 @@ sliwin_check_fast(const volatile struct
* If it's more than one window older than the highest sequence
* number we've seen, reject.
*/
+#ifdef __HAVE_ATOMIC64_LOADSTORE
if (S + SLIWIN_NPKT < atomic_load_relaxed(&W->T))
return EAUTH;
+#endif
/*
* Otherwise, we need to take the lock to decide, so don't
@@ -406,7 +408,11 @@ sliwin_update(struct sliwin *W, uint64_t
for (k = 0; k < MIN(j - i, SLIWIN_WORDS); k++)
W->B[(i + k + 1) % SLIWIN_WORDS] = 0;
+#ifdef __HAVE_ATOMIC64_LOADSTORE
atomic_store_relaxed(&W->T, S);
+#else
+ W->T = S;
+#endif
}
/* Test and set the bit -- if already set, reject. */
