diff mbox series

[1/5] xfrm: no need to set DST_NOPOLICY in IPv4

Message ID 20220720081746.1187382-2-steffen.klassert@secunet.com (mailing list archive)
State Accepted
Delegated to: Netdev Maintainers
Headers show
Series [1/5] xfrm: no need to set DST_NOPOLICY in IPv4 | expand

Checks

Context Check Description
netdev/tree_selection success Guessed tree name to be net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Pull request is its own cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1995 this patch: 1995
netdev/cc_maintainers warning 4 maintainers not CCed: yoshfuji@linux-ipv6.org pabeni@redhat.com dsahern@kernel.org edumazet@google.com
netdev/build_clang success Errors and warnings before: 290 this patch: 290
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 2125 this patch: 2125
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 108 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Steffen Klassert July 20, 2022, 8:17 a.m. UTC 
From: Eyal Birger <eyal.birger@gmail.com>

This is a cleanup patch following commit e6175a2ed1f1
("xfrm: fix "disable_policy" flag use when arriving from different devices")
which made DST_NOPOLICY no longer be used for inbound policy checks.

On outbound the flag was set, but never used.

As such, avoid setting it altogether and remove the nopolicy argument
from rt_dst_alloc().

Signed-off-by: Eyal Birger <eyal.birger@gmail.com>
Reviewed-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
---
 drivers/net/vrf.c   |  2 +-
 include/net/route.h |  3 +--
 net/ipv4/route.c    | 24 ++++++++----------------
 3 files changed, 10 insertions(+), 19 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c
index 40445a12c682..5df7a0abc39d 100644
--- a/drivers/net/vrf.c
+++ b/drivers/net/vrf.c
@@ -1077,7 +1077,7 @@  static int vrf_rtable_create(struct net_device *dev)
 		return -ENOMEM;
 
 	/* create a dst for routing packets out through a VRF device */
-	rth = rt_dst_alloc(dev, 0, RTN_UNICAST, 1, 1);
+	rth = rt_dst_alloc(dev, 0, RTN_UNICAST, 1);
 	if (!rth)
 		return -ENOMEM;
 
diff --git a/include/net/route.h b/include/net/route.h
index 991a3985712d..b6743ff88e30 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -244,8 +244,7 @@  void ip_rt_multicast_event(struct in_device *);
 int ip_rt_ioctl(struct net *, unsigned int cmd, struct rtentry *rt);
 void ip_rt_get_source(u8 *src, struct sk_buff *skb, struct rtable *rt);
 struct rtable *rt_dst_alloc(struct net_device *dev,
-			     unsigned int flags, u16 type,
-			     bool nopolicy, bool noxfrm);
+			    unsigned int flags, u16 type, bool noxfrm);
 struct rtable *rt_dst_clone(struct net_device *dev, struct rtable *rt);
 
 struct in_ifaddr;
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 2d16bcc7d346..bd351fab46e6 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1626,12 +1626,11 @@  static void rt_set_nexthop(struct rtable *rt, __be32 daddr,
 
 struct rtable *rt_dst_alloc(struct net_device *dev,
 			    unsigned int flags, u16 type,
-			    bool nopolicy, bool noxfrm)
+			    bool noxfrm)
 {
 	struct rtable *rt;
 
 	rt = dst_alloc(&ipv4_dst_ops, dev, 1, DST_OBSOLETE_FORCE_CHK,
-		       (nopolicy ? DST_NOPOLICY : 0) |
 		       (noxfrm ? DST_NOXFRM : 0));
 
 	if (rt) {
@@ -1726,7 +1725,6 @@  static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr,
 	struct in_device *in_dev = __in_dev_get_rcu(dev);
 	unsigned int flags = RTCF_MULTICAST;
 	struct rtable *rth;
-	bool no_policy;
 	u32 itag = 0;
 	int err;
 
@@ -1737,12 +1735,11 @@  static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr,
 	if (our)
 		flags |= RTCF_LOCAL;
 
-	no_policy = IN_DEV_ORCONF(in_dev, NOPOLICY);
-	if (no_policy)
+	if (IN_DEV_ORCONF(in_dev, NOPOLICY))
 		IPCB(skb)->flags |= IPSKB_NOPOLICY;
 
 	rth = rt_dst_alloc(dev_net(dev)->loopback_dev, flags, RTN_MULTICAST,
-			   no_policy, false);
+			   false);
 	if (!rth)
 		return -ENOBUFS;
 
@@ -1801,7 +1798,7 @@  static int __mkroute_input(struct sk_buff *skb,
 	struct rtable *rth;
 	int err;
 	struct in_device *out_dev;
-	bool do_cache, no_policy;
+	bool do_cache;
 	u32 itag = 0;
 
 	/* get a working reference to the output device */
@@ -1846,8 +1843,7 @@  static int __mkroute_input(struct sk_buff *skb,
 		}
 	}
 
-	no_policy = IN_DEV_ORCONF(in_dev, NOPOLICY);
-	if (no_policy)
+	if (IN_DEV_ORCONF(in_dev, NOPOLICY))
 		IPCB(skb)->flags |= IPSKB_NOPOLICY;
 
 	fnhe = find_exception(nhc, daddr);
@@ -1862,7 +1858,7 @@  static int __mkroute_input(struct sk_buff *skb,
 		}
 	}
 
-	rth = rt_dst_alloc(out_dev->dev, 0, res->type, no_policy,
+	rth = rt_dst_alloc(out_dev->dev, 0, res->type,
 			   IN_DEV_ORCONF(out_dev, NOXFRM));
 	if (!rth) {
 		err = -ENOBUFS;
@@ -2237,7 +2233,6 @@  static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
 	struct rtable	*rth;
 	struct flowi4	fl4;
 	bool do_cache = true;
-	bool no_policy;
 
 	/* IP on this device is disabled. */
 
@@ -2356,8 +2351,7 @@  out:	return err;
 	RT_CACHE_STAT_INC(in_brd);
 
 local_input:
-	no_policy = IN_DEV_ORCONF(in_dev, NOPOLICY);
-	if (no_policy)
+	if (IN_DEV_ORCONF(in_dev, NOPOLICY))
 		IPCB(skb)->flags |= IPSKB_NOPOLICY;
 
 	do_cache &= res->fi && !itag;
@@ -2373,8 +2367,7 @@  out:	return err;
 	}
 
 	rth = rt_dst_alloc(ip_rt_get_dev(net, res),
-			   flags | RTCF_LOCAL, res->type,
-			   no_policy, false);
+			   flags | RTCF_LOCAL, res->type, false);
 	if (!rth)
 		goto e_nobufs;
 
@@ -2597,7 +2590,6 @@  static struct rtable *__mkroute_output(const struct fib_result *res,
 
 add:
 	rth = rt_dst_alloc(dev_out, flags, type,
-			   IN_DEV_ORCONF(in_dev, NOPOLICY),
 			   IN_DEV_ORCONF(in_dev, NOXFRM));
 	if (!rth)
 		return ERR_PTR(-ENOBUFS);