@@ -3432,7 +3432,7 @@ static int bond_xmit_hash_policy_l34(struct sk_buff *skb, int count)
int layer4_xor = 0;
if (skb->protocol == htons(ETH_P_IP)) {
- if (!(iph->frag_off & htons(IP_MF|IP_OFFSET)) &&
+ if (!ip_is_fragment(iph) &&
(iph->protocol == IPPROTO_TCP ||
iph->protocol == IPPROTO_UDP)) {
layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1)));
@@ -532,7 +532,7 @@ static void ioc3_tcpudp_checksum(struct sk_buff *skb, uint32_t hwsum, int len)
return;
ih = (struct iphdr *) ((char *)eh + ETH_HLEN);
- if (ih->frag_off & htons(IP_MF | IP_OFFSET))
+ if (ip_is_fragment(ih))
return;
proto = ih->protocol;
@@ -2257,7 +2257,7 @@ myri10ge_get_frag_header(struct skb_frag_struct *frag, void **mac_hdr,
*ip_hdr = iph;
if (iph->protocol != IPPROTO_TCP)
return -1;
- if (iph->frag_off & htons(IP_MF | IP_OFFSET))
+ if (ip_is_fragment(iph))
return -1;
*hdr_flags |= LRO_TCP;
*tcpudp_hdr = (u8 *) (*ip_hdr) + (iph->ihl << 2);
@@ -4111,7 +4111,7 @@ static netdev_tx_t s2io_xmit(struct sk_buff *skb, struct net_device *dev)
struct tcphdr *th;
ip = ip_hdr(skb);
- if ((ip->frag_off & htons(IP_OFFSET|IP_MF)) == 0) {
+ if (!ip_is_fragment(ip)) {
th = (struct tcphdr *)(((unsigned char *)ip) +
ip->ihl*4);
@@ -652,7 +652,7 @@ int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
/* RFS must validate the IP header length before calling us */
EFX_BUG_ON_PARANOID(!pskb_may_pull(skb, nhoff + sizeof(*ip)));
ip = (const struct iphdr *)(skb->data + nhoff);
- if (ip->frag_off & htons(IP_MF | IP_OFFSET))
+ if (ip_is_fragment(ip))
return -EPROTONOSUPPORT;
EFX_BUG_ON_PARANOID(!pskb_may_pull(skb, nhoff + 4 * ip->ihl + 4));
ports = (const __be16 *)(skb->data + nhoff + 4 * ip->ihl);
@@ -629,7 +629,7 @@ static u32 vxge_get_vpath_no(struct vxgedev *vdev, struct sk_buff *skb)
ip = ip_hdr(skb);
- if ((ip->frag_off & htons(IP_OFFSET|IP_MF)) == 0) {
+ if (!ip_is_fragment(ip)) {
th = (struct tcphdr *)(((unsigned char *)ip) +
ip->ihl*4);
@@ -250,6 +250,11 @@ int ip_decrease_ttl(struct iphdr *iph)
return --iph->ttl;
}
+static inline bool ip_is_fragment(const struct iphdr *iph)
+{
+ return (iph->frag_off & htons(IP_MF | IP_OFFSET)) != 0;
+}
+
static inline
int ip_dont_fragment(struct sock *sk, struct dst_entry *dst)
{
@@ -2532,7 +2532,7 @@ __u32 __skb_get_rxhash(struct sk_buff *skb)
goto done;
ip = (const struct iphdr *) (skb->data + nhoff);
- if (ip->frag_off & htons(IP_MF | IP_OFFSET))
+ if (ip_is_fragment(ip))
ip_proto = 0;
else
ip_proto = ip->protocol;
@@ -165,7 +165,7 @@ int ip_call_ra_chain(struct sk_buff *skb)
(!sk->sk_bound_dev_if ||
sk->sk_bound_dev_if == dev->ifindex) &&
net_eq(sock_net(sk), dev_net(dev))) {
- if (ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) {
+ if (ip_is_fragment(ip_hdr(skb))) {
if (ip_defrag(skb, IP_DEFRAG_CALL_RA_CHAIN))
return 1;
}
@@ -256,7 +256,7 @@ int ip_local_deliver(struct sk_buff *skb)
* Reassemble IP fragments.
*/
- if (ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) {
+ if (ip_is_fragment(ip_hdr(skb))) {
if (ip_defrag(skb, IP_DEFRAG_LOCAL_DELIVER))
return 0;
}
@@ -489,7 +489,7 @@ int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
if (first_len - hlen > mtu ||
((first_len - hlen) & 7) ||
- (iph->frag_off & htons(IP_MF|IP_OFFSET)) ||
+ ip_is_fragment(iph) ||
skb_cloned(skb))
goto slow_path;
@@ -932,7 +932,7 @@ static int __init ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, str
goto drop;
/* Fragments are not supported */
- if (h->frag_off & htons(IP_OFFSET | IP_MF)) {
+ if (ip_is_fragment(h)) {
if (net_ratelimit())
printk(KERN_ERR "DHCP/BOOTP: Ignoring fragmented "
"reply.\n");
@@ -82,7 +82,7 @@ static unsigned int ipv4_conntrack_defrag(unsigned int hooknum,
#endif
#endif
/* Gather fragments. */
- if (ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) {
+ if (ip_is_fragment(ip_hdr(skb))) {
enum ip_defrag_users user = nf_ct_defrag_user(hooknum, skb);
if (nf_ct_ipv4_gather_frags(skb, user))
return NF_STOLEN;
@@ -88,7 +88,7 @@ nf_nat_fn(unsigned int hooknum,
/* We never see fragments: conntrack defrags on pre-routing
and local-out, and nf_nat_out protects post-routing. */
- NF_CT_ASSERT(!(ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)));
+ NF_CT_ASSERT(!ip_is_fragment(ip_hdr(skb)));
ct = nf_ct_get(skb, &ctinfo);
/* Can't track? It's not due to stress, or conntrack would
@@ -117,7 +117,7 @@ _decode_session4(struct sk_buff *skb, struct flowi *fl, int reverse)
memset(fl4, 0, sizeof(struct flowi4));
fl4->flowi4_mark = skb->mark;
- if (!(iph->frag_off & htons(IP_MF | IP_OFFSET))) {
+ if (!ip_is_fragment(iph)) {
switch (iph->protocol) {
case IPPROTO_UDP:
case IPPROTO_UDPLITE:
@@ -852,7 +852,7 @@ static int ip_vs_out_icmp(struct sk_buff *skb, int *related,
*related = 1;
/* reassemble IP fragments */
- if (ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) {
+ if (ip_is_fragment(ip_hdr(skb))) {
if (ip_vs_gather_frags(skb, ip_vs_defrag_user(hooknum)))
return NF_STOLEN;
}
@@ -1156,8 +1156,7 @@ ip_vs_out(unsigned int hooknum, struct sk_buff *skb, int af)
ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
} else
#endif
- if (unlikely(ip_hdr(skb)->frag_off & htons(IP_MF|IP_OFFSET) &&
- !pp->dont_defrag)) {
+ if (unlikely(ip_is_fragment(ip_hdr(skb)) && !pp->dont_defrag)) {
if (ip_vs_gather_frags(skb,
ip_vs_defrag_user(hooknum)))
return NF_STOLEN;
@@ -1310,7 +1309,7 @@ ip_vs_in_icmp(struct sk_buff *skb, int *related, unsigned int hooknum)
*related = 1;
/* reassemble IP fragments */
- if (ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) {
+ if (ip_is_fragment(ip_hdr(skb))) {
if (ip_vs_gather_frags(skb, ip_vs_defrag_user(hooknum)))
return NF_STOLEN;
}
@@ -121,7 +121,7 @@ static u32 flow_get_proto_src(struct sk_buff *skb)
if (!pskb_network_may_pull(skb, sizeof(*iph)))
break;
iph = ip_hdr(skb);
- if (iph->frag_off & htons(IP_MF | IP_OFFSET))
+ if (ip_is_fragment(iph))
break;
poff = proto_ports_offset(iph->protocol);
if (poff >= 0 &&
@@ -163,7 +163,7 @@ static u32 flow_get_proto_dst(struct sk_buff *skb)
if (!pskb_network_may_pull(skb, sizeof(*iph)))
break;
iph = ip_hdr(skb);
- if (iph->frag_off & htons(IP_MF | IP_OFFSET))
+ if (ip_is_fragment(iph))
break;
poff = proto_ports_offset(iph->protocol);
if (poff >= 0 &&
@@ -167,7 +167,7 @@ restart:
dst = &nhptr->daddr;
protocol = nhptr->protocol;
xprt = ((u8 *)nhptr) + (nhptr->ihl<<2);
- if (nhptr->frag_off & htons(IP_MF | IP_OFFSET))
+ if (ip_is_fragment(nhptr))
return -1;
#endif
@@ -181,7 +181,7 @@ static bool choke_match_flow(struct sk_buff *skb1,
ip1->saddr != ip2->saddr || ip1->daddr != ip2->daddr)
return false;
- if ((ip1->frag_off | ip2->frag_off) & htons(IP_MF | IP_OFFSET))
+ if (ip_is_fragment(ip1) | ip_is_fragment(ip2))
ip_proto = 0;
off1 += ip1->ihl * 4;
off2 += ip2->ihl * 4;
@@ -157,7 +157,7 @@ static unsigned int sfq_hash(struct sfq_sched_data *q, struct sk_buff *skb)
iph = ip_hdr(skb);
h = (__force u32)iph->daddr;
h2 = (__force u32)iph->saddr ^ iph->protocol;
- if (iph->frag_off & htons(IP_MF | IP_OFFSET))
+ if (ip_is_fragment(iph))
break;
poff = proto_ports_offset(iph->protocol);
if (poff >= 0 &&
There are enough instances of this: iph->frag_off & htons(IP_MF | IP_OFFSET) that a helper function is probably warranted. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> --- v2: fix pre-existing ==0 style issues; change new fcn from int to bool drivers/net/bonding/bond_main.c | 2 +- drivers/net/ioc3-eth.c | 2 +- drivers/net/myri10ge/myri10ge.c | 2 +- drivers/net/s2io.c | 2 +- drivers/net/sfc/filter.c | 2 +- drivers/net/vxge/vxge-main.c | 2 +- include/net/ip.h | 5 +++++ net/core/dev.c | 2 +- net/ipv4/ip_input.c | 4 ++-- net/ipv4/ip_output.c | 2 +- net/ipv4/ipconfig.c | 2 +- net/ipv4/netfilter/nf_defrag_ipv4.c | 2 +- net/ipv4/netfilter/nf_nat_standalone.c | 2 +- net/ipv4/xfrm4_policy.c | 2 +- net/netfilter/ipvs/ip_vs_core.c | 7 +++---- net/sched/cls_flow.c | 4 ++-- net/sched/cls_rsvp.h | 2 +- net/sched/sch_choke.c | 2 +- net/sched/sch_sfq.c | 2 +- 19 files changed, 27 insertions(+), 23 deletions(-)