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[src/trunk]: src/sys - centralize header align and pullup into a single inlin...
details: https://anonhg.NetBSD.org/src/rev/d69f53d29c0d
branches: trunk
changeset: 952690:d69f53d29c0d
user: christos <christos%NetBSD.org@localhost>
date: Sun Feb 14 20:58:34 2021 +0000
description:
- centralize header align and pullup into a single inline function
- use a single macro to align pointers and expose the alignment, instead
of hard-coding 3 in 1/2 the macros.
- fix an issue in the ipv6 lt2p where it was aligning for ipv4 and pulling
for ipv6.
diffstat:
sys/net/if_arp.h | 3 ++-
sys/net/if_bridge.c | 40 +++++++++++-----------------------------
sys/netinet/icmp_private.h | 8 ++------
sys/netinet/if_arp.c | 8 ++++----
sys/netinet/igmp_var.h | 8 ++------
sys/netinet/in_l2tp.c | 13 ++++---------
sys/netinet/ip_flow.c | 11 +++++------
sys/netinet/ip_input.c | 20 ++++++--------------
sys/netinet/ip_private.h | 8 ++------
sys/netinet/tcp_input.c | 10 +++++-----
sys/netinet/tcp_private.h | 8 ++------
sys/netinet/udp_private.h | 8 ++------
sys/netinet/udp_usrreq.c | 8 ++++----
sys/netinet6/icmp6.c | 8 ++++----
sys/netinet6/in6_l2tp.c | 14 +++++---------
sys/netinet6/ip6_flow.c | 6 +++---
sys/netinet6/ip6_input.c | 29 ++++++++++-------------------
sys/netinet6/ip6_private.h | 8 ++------
sys/netinet6/udp6_usrreq.c | 8 ++++----
sys/sys/mbuf.h | 13 ++++++++++++-
sys/sys/param.h | 8 +++++++-
21 files changed, 98 insertions(+), 149 deletions(-)
diffs (truncated from 710 to 300 lines):
diff -r e15ec316fef6 -r d69f53d29c0d sys/net/if_arp.h
--- a/sys/net/if_arp.h Sun Feb 14 20:30:31 2021 +0000
+++ b/sys/net/if_arp.h Sun Feb 14 20:58:34 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: if_arp.h,v 1.39 2021/02/14 19:47:16 roy Exp $ */
+/* $NetBSD: if_arp.h,v 1.40 2021/02/14 20:58:34 christos Exp $ */
/*
* Copyright (c) 1986, 1993
@@ -72,6 +72,7 @@
uint8_t ar_tpa[]; /* target protocol address */
#endif
};
+#define ARP_HDR_ALIGNMENT 3
static __inline uint8_t *
ar_data(struct arphdr *ap)
diff -r e15ec316fef6 -r d69f53d29c0d sys/net/if_bridge.c
--- a/sys/net/if_bridge.c Sun Feb 14 20:30:31 2021 +0000
+++ b/sys/net/if_bridge.c Sun Feb 14 20:58:34 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: if_bridge.c,v 1.177 2020/11/02 12:14:59 roy Exp $ */
+/* $NetBSD: if_bridge.c,v 1.178 2021/02/14 20:58:34 christos Exp $ */
/*
* Copyright 2001 Wasabi Systems, Inc.
@@ -80,7 +80,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_bridge.c,v 1.177 2020/11/02 12:14:59 roy Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_bridge.c,v 1.178 2021/02/14 20:58:34 christos Exp $");
#ifdef _KERNEL_OPT
#include "opt_inet.h"
@@ -2806,18 +2806,10 @@
if (*mp == NULL)
return -1;
- if (IP_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
- if ((m = m_copyup(m, sizeof(struct ip),
- (max_linkhdr + 3) & ~3)) == NULL) {
- /* XXXJRT new stat, please */
- ip_statinc(IP_STAT_TOOSMALL);
- goto bad;
- }
- } else if (__predict_false(m->m_len < sizeof (struct ip))) {
- if ((m = m_pullup(m, sizeof (struct ip))) == NULL) {
- ip_statinc(IP_STAT_TOOSMALL);
- goto bad;
- }
+ if (m_get_aligned_hdr(&m, IP_HDR_ALIGNMENT, sizeof(*ip), true) != 0) {
+ /* XXXJRT new stat, please */
+ ip_statinc(IP_STAT_TOOSMALL);
+ goto bad;
}
ip = mtod(m, struct ip *);
if (ip == NULL) goto bad;
@@ -2908,22 +2900,12 @@
* it. Otherwise, if it is aligned, make sure the entire base
* IPv6 header is in the first mbuf of the chain.
*/
- if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
+ if (m_get_aligned_hdr(&m, IP6_HDR_ALIGNMENT, sizeof(*ip6), true) != 0) {
struct ifnet *inifp = m_get_rcvif_NOMPSAFE(m);
- if ((m = m_copyup(m, sizeof(struct ip6_hdr),
- (max_linkhdr + 3) & ~3)) == NULL) {
- /* XXXJRT new stat, please */
- ip6_statinc(IP6_STAT_TOOSMALL);
- in6_ifstat_inc(inifp, ifs6_in_hdrerr);
- goto bad;
- }
- } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
- struct ifnet *inifp = m_get_rcvif_NOMPSAFE(m);
- if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
- ip6_statinc(IP6_STAT_TOOSMALL);
- in6_ifstat_inc(inifp, ifs6_in_hdrerr);
- goto bad;
- }
+ /* XXXJRT new stat, please */
+ ip6_statinc(IP6_STAT_TOOSMALL);
+ in6_ifstat_inc(inifp, ifs6_in_hdrerr);
+ goto bad;
}
ip6 = mtod(m, struct ip6_hdr *);
diff -r e15ec316fef6 -r d69f53d29c0d sys/netinet/icmp_private.h
--- a/sys/netinet/icmp_private.h Sun Feb 14 20:30:31 2021 +0000
+++ b/sys/netinet/icmp_private.h Sun Feb 14 20:58:34 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: icmp_private.h,v 1.3 2008/04/28 20:24:09 martin Exp $ */
+/* $NetBSD: icmp_private.h,v 1.4 2021/02/14 20:58:35 christos Exp $ */
/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
@@ -44,11 +44,7 @@
#define ICMP_STATINC(x) _NET_STATINC(icmpstat_percpu, x)
-#ifdef __NO_STRICT_ALIGNMENT
-#define ICMP_HDR_ALIGNED_P(ic) 1
-#else
-#define ICMP_HDR_ALIGNED_P(ic) ((((vaddr_t) (ic)) & 3) == 0)
-#endif
+#define ICMP_HDR_ALIGNMENT 3
#endif /* _KERNEL_ */
#endif /* !_NETINET_ICMP_PRIVATE_H_ */
diff -r e15ec316fef6 -r d69f53d29c0d sys/netinet/if_arp.c
--- a/sys/netinet/if_arp.c Sun Feb 14 20:30:31 2021 +0000
+++ b/sys/netinet/if_arp.c Sun Feb 14 20:58:34 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: if_arp.c,v 1.301 2021/02/14 19:47:17 roy Exp $ */
+/* $NetBSD: if_arp.c,v 1.302 2021/02/14 20:58:35 christos Exp $ */
/*
* Copyright (c) 1998, 2000, 2008 The NetBSD Foundation, Inc.
@@ -68,7 +68,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_arp.c,v 1.301 2021/02/14 19:47:17 roy Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_arp.c,v 1.302 2021/02/14 20:58:35 christos Exp $");
#ifdef _KERNEL_OPT
#include "opt_ddb.h"
@@ -712,7 +712,7 @@
goto badlen;
}
ar = mtod(m, struct arphdr *);
- KASSERT(ARP_HDR_ALIGNED_P(ar));
+ KASSERT(POINTER_ALIGNED_P(ar, ARP_HDR_ALIGNMENT));
rcvif = m_get_rcvif(m, &s);
if (__predict_false(rcvif == NULL)) {
@@ -741,7 +741,7 @@
if ((m = m_pullup(m, arplen)) == NULL)
goto badlen;
ar = mtod(m, struct arphdr *);
- KASSERT(ARP_HDR_ALIGNED_P(ar));
+ KASSERT(POINTER_ALIGNED_P(ar, ARP_HDR_ALIGNMENT));
}
switch (ntohs(ar->ar_pro)) {
diff -r e15ec316fef6 -r d69f53d29c0d sys/netinet/igmp_var.h
--- a/sys/netinet/igmp_var.h Sun Feb 14 20:30:31 2021 +0000
+++ b/sys/netinet/igmp_var.h Sun Feb 14 20:58:34 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: igmp_var.h,v 1.25 2018/09/14 05:09:51 maxv Exp $ */
+/* $NetBSD: igmp_var.h,v 1.26 2021/02/14 20:58:35 christos Exp $ */
/*
* Copyright (c) 1992, 1993
@@ -105,11 +105,7 @@
*/
#define IGMP_RANDOM_DELAY(X) (cprng_fast32() % (X) + 1)
-#ifdef __NO_STRICT_ALIGNMENT
-#define IGMP_HDR_ALIGNED_P(ig) 1
-#else
-#define IGMP_HDR_ALIGNED_P(ig) ((((vaddr_t) (ig)) & 3) == 0)
-#endif
+#define IGMP_HDR_ALIGNMENT 3
void igmp_init(void);
void igmp_input(struct mbuf *, int, int);
diff -r e15ec316fef6 -r d69f53d29c0d sys/netinet/in_l2tp.c
--- a/sys/netinet/in_l2tp.c Sun Feb 14 20:30:31 2021 +0000
+++ b/sys/netinet/in_l2tp.c Sun Feb 14 20:58:34 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: in_l2tp.c,v 1.18 2020/01/29 04:37:24 thorpej Exp $ */
+/* $NetBSD: in_l2tp.c,v 1.19 2021/02/14 20:58:35 christos Exp $ */
/*
* Copyright (c) 2017 Internet Initiative Japan Inc.
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: in_l2tp.c,v 1.18 2020/01/29 04:37:24 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: in_l2tp.c,v 1.19 2021/02/14 20:58:35 christos Exp $");
#ifdef _KERNEL_OPT
#include "opt_l2tp.h"
@@ -197,13 +197,8 @@
error = ENOBUFS;
goto out;
}
- if (IP_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
- m = m_copyup(m, sizeof(struct ip), 0);
- } else {
- if (m->m_len < sizeof(struct ip))
- m = m_pullup(m, sizeof(struct ip));
- }
- if (m == NULL) {
+ if (m_get_aligned_hdr(&m, IP_HDR_ALIGNMENT, sizeof(iphdr), false) != 0)
+ {
error = ENOBUFS;
goto out;
}
diff -r e15ec316fef6 -r d69f53d29c0d sys/netinet/ip_flow.c
--- a/sys/netinet/ip_flow.c Sun Feb 14 20:30:31 2021 +0000
+++ b/sys/netinet/ip_flow.c Sun Feb 14 20:58:34 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ip_flow.c,v 1.82 2018/04/11 08:29:19 maxv Exp $ */
+/* $NetBSD: ip_flow.c,v 1.83 2021/02/14 20:58:35 christos Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ip_flow.c,v 1.82 2018/04/11 08:29:19 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ip_flow.c,v 1.83 2021/02/14 20:58:35 christos Exp $");
#ifdef _KERNEL_OPT
#include "opt_net_mpsafe.h"
@@ -230,9 +230,8 @@
/*
* IP header with no option and valid version and length
*/
- if (IP_HDR_ALIGNED_P(mtod(m, const void *)))
- ip = mtod(m, struct ip *);
- else {
+ ip = mtod(m, struct ip *);
+ if (!POINTER_ALIGNED_P(ip, IP_HDR_ALIGNMENT) {
memcpy(&ip_store, mtod(m, const void *), sizeof(ip_store));
ip = &ip_store;
}
@@ -314,7 +313,7 @@
*
* XXX Use m_copyback_cow(9) here? --dyoung
*/
- if (IP_HDR_ALIGNED_P(mtod(m, void *)) == 0)
+ if (!POINTER_ALIGNED_P(mtod(m, void *), IP_HDR_ALIGNMENT))
memcpy(mtod(m, void *), &ip_store, sizeof(ip_store));
/*
diff -r e15ec316fef6 -r d69f53d29c0d sys/netinet/ip_input.c
--- a/sys/netinet/ip_input.c Sun Feb 14 20:30:31 2021 +0000
+++ b/sys/netinet/ip_input.c Sun Feb 14 20:58:34 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ip_input.c,v 1.397 2020/08/28 06:31:42 ozaki-r Exp $ */
+/* $NetBSD: ip_input.c,v 1.398 2021/02/14 20:58:35 christos Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -91,7 +91,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ip_input.c,v 1.397 2020/08/28 06:31:42 ozaki-r Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ip_input.c,v 1.398 2021/02/14 20:58:35 christos Exp $");
#ifdef _KERNEL_OPT
#include "opt_inet.h"
@@ -454,18 +454,10 @@
* it. Otherwise, if it is aligned, make sure the entire
* base IP header is in the first mbuf of the chain.
*/
- if (IP_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
- if ((m = m_copyup(m, sizeof(struct ip),
- (max_linkhdr + 3) & ~3)) == NULL) {
- /* XXXJRT new stat, please */
- IP_STATINC(IP_STAT_TOOSMALL);
- goto out;
- }
- } else if (__predict_false(m->m_len < sizeof(struct ip))) {
- if ((m = m_pullup(m, sizeof(struct ip))) == NULL) {
- IP_STATINC(IP_STAT_TOOSMALL);
- goto out;
- }
+ if (m_get_aligned_hdr(&m, IP_HDR_ALIGNMENT, sizeof(*ip), true) != 0) {
+ /* XXXJRT new stat, please */
+ IP_STATINC(IP_STAT_TOOSMALL);
+ goto out;
}
ip = mtod(m, struct ip *);
if (ip->ip_v != IPVERSION) {
diff -r e15ec316fef6 -r d69f53d29c0d sys/netinet/ip_private.h
--- a/sys/netinet/ip_private.h Sun Feb 14 20:30:31 2021 +0000
+++ b/sys/netinet/ip_private.h Sun Feb 14 20:58:34 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ip_private.h,v 1.3 2008/04/28 20:24:09 martin Exp $ */
+/* $NetBSD: ip_private.h,v 1.4 2021/02/14 20:58:35 christos Exp $ */
/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
@@ -43,11 +43,7 @@
#define IP_STATINC(x) _NET_STATINC(ipstat_percpu, x)
#define IP_STATDEC(x) _NET_STATDEC(ipstat_percpu, x)
-#ifdef __NO_STRICT_ALIGNMENT
-#define IP_HDR_ALIGNED_P(ip) 1
-#else
-#define IP_HDR_ALIGNED_P(ip) ((((vaddr_t) (ip)) & 3) == 0)
-#endif
+#define IP_HDR_ALIGNMENT 3
#endif /* _KERNEL */
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