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ip: Use inline function dst_metric() instead of direct access to dst-…
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…>metric[]

There are functions to refer to the value of dst->metric[THE_METRIC-1]
directly without use of a inline function "dst_metric" defined in
net/dst.h.

The following patch changes them to use the inline function
consistently.

Signed-off-by: Satoru SATOH <satoru.satoh@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Satoru SATOH authored and David S. Miller committed May 5, 2008
1 parent 0bbeafd commit 5ffc02a
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Showing 4 changed files with 25 additions and 24 deletions.
12 changes: 6 additions & 6 deletions net/decnet/dn_route.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -235,14 +235,14 @@ static void dn_dst_update_pmtu(struct dst_entry *dst, u32 mtu)
else
min_mtu -= 21;

if (dst->metrics[RTAX_MTU-1] > mtu && mtu >= min_mtu) {
if (dst_metric(dst, RTAX_MTU) > mtu && mtu >= min_mtu) {
if (!(dst_metric_locked(dst, RTAX_MTU))) {
dst->metrics[RTAX_MTU-1] = mtu;
dst_set_expires(dst, dn_rt_mtu_expires);
}
if (!(dst_metric_locked(dst, RTAX_ADVMSS))) {
u32 mss = mtu - DN_MAX_NSP_DATA_HEADER;
if (dst->metrics[RTAX_ADVMSS-1] > mss)
if (dst_metric(dst, RTAX_ADVMSS) > mss)
dst->metrics[RTAX_ADVMSS-1] = mss;
}
}
Expand Down Expand Up @@ -805,12 +805,12 @@ static int dn_rt_set_next_hop(struct dn_route *rt, struct dn_fib_res *res)
rt->u.dst.neighbour = n;
}

if (rt->u.dst.metrics[RTAX_MTU-1] == 0 ||
rt->u.dst.metrics[RTAX_MTU-1] > rt->u.dst.dev->mtu)
if (dst_metric(&rt->u.dst, RTAX_MTU) == 0 ||
dst_metric(&rt->u.dst, RTAX_MTU) > rt->u.dst.dev->mtu)
rt->u.dst.metrics[RTAX_MTU-1] = rt->u.dst.dev->mtu;
mss = dn_mss_from_pmtu(dev, dst_mtu(&rt->u.dst));
if (rt->u.dst.metrics[RTAX_ADVMSS-1] == 0 ||
rt->u.dst.metrics[RTAX_ADVMSS-1] > mss)
if (dst_metric(&rt->u.dst, RTAX_ADVMSS) == 0 ||
dst_metric(&rt->u.dst, RTAX_ADVMSS) > mss)
rt->u.dst.metrics[RTAX_ADVMSS-1] = mss;
return 0;
}
Expand Down
16 changes: 8 additions & 8 deletions net/ipv4/route.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1468,14 +1468,14 @@ unsigned short ip_rt_frag_needed(struct net *net, struct iphdr *iph,

/* BSD 4.2 compatibility hack :-( */
if (mtu == 0 &&
old_mtu >= rth->u.dst.metrics[RTAX_MTU-1] &&
old_mtu >= dst_metric(&rth->u.dst, RTAX_MTU) &&
old_mtu >= 68 + (iph->ihl << 2))
old_mtu -= iph->ihl << 2;

mtu = guess_mtu(old_mtu);
}
if (mtu <= rth->u.dst.metrics[RTAX_MTU-1]) {
if (mtu < rth->u.dst.metrics[RTAX_MTU-1]) {
if (mtu <= dst_metric(&rth->u.dst, RTAX_MTU)) {
if (mtu < dst_metric(&rth->u.dst, RTAX_MTU)) {
dst_confirm(&rth->u.dst);
if (mtu < ip_rt_min_pmtu) {
mtu = ip_rt_min_pmtu;
Expand All @@ -1497,7 +1497,7 @@ unsigned short ip_rt_frag_needed(struct net *net, struct iphdr *iph,

static void ip_rt_update_pmtu(struct dst_entry *dst, u32 mtu)
{
if (dst->metrics[RTAX_MTU-1] > mtu && mtu >= 68 &&
if (dst_metric(dst, RTAX_MTU) > mtu && mtu >= 68 &&
!(dst_metric_locked(dst, RTAX_MTU))) {
if (mtu < ip_rt_min_pmtu) {
mtu = ip_rt_min_pmtu;
Expand Down Expand Up @@ -1624,14 +1624,14 @@ static void rt_set_nexthop(struct rtable *rt, struct fib_result *res, u32 itag)
} else
rt->u.dst.metrics[RTAX_MTU-1]= rt->u.dst.dev->mtu;

if (rt->u.dst.metrics[RTAX_HOPLIMIT-1] == 0)
if (dst_metric(&rt->u.dst, RTAX_HOPLIMIT) == 0)
rt->u.dst.metrics[RTAX_HOPLIMIT-1] = sysctl_ip_default_ttl;
if (rt->u.dst.metrics[RTAX_MTU-1] > IP_MAX_MTU)
if (dst_metric(&rt->u.dst, RTAX_MTU) > IP_MAX_MTU)
rt->u.dst.metrics[RTAX_MTU-1] = IP_MAX_MTU;
if (rt->u.dst.metrics[RTAX_ADVMSS-1] == 0)
if (dst_metric(&rt->u.dst, RTAX_ADVMSS) == 0)
rt->u.dst.metrics[RTAX_ADVMSS-1] = max_t(unsigned int, rt->u.dst.dev->mtu - 40,
ip_rt_min_advmss);
if (rt->u.dst.metrics[RTAX_ADVMSS-1] > 65535 - 40)
if (dst_metric(&rt->u.dst, RTAX_ADVMSS) > 65535 - 40)
rt->u.dst.metrics[RTAX_ADVMSS-1] = 65535 - 40;

#ifdef CONFIG_NET_CLS_ROUTE
Expand Down
15 changes: 8 additions & 7 deletions net/ipv4/tcp_input.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -66,6 +66,7 @@
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/sysctl.h>
#include <net/dst.h>
#include <net/tcp.h>
#include <net/inet_common.h>
#include <linux/ipsec.h>
Expand Down Expand Up @@ -605,7 +606,7 @@ static u32 tcp_rto_min(struct sock *sk)
u32 rto_min = TCP_RTO_MIN;

if (dst && dst_metric_locked(dst, RTAX_RTO_MIN))
rto_min = dst->metrics[RTAX_RTO_MIN - 1];
rto_min = dst_metric(dst, RTAX_RTO_MIN);
return rto_min;
}

Expand Down Expand Up @@ -769,7 +770,7 @@ void tcp_update_metrics(struct sock *sk)
dst->metrics[RTAX_RTTVAR - 1] = m;
else
dst->metrics[RTAX_RTTVAR-1] -=
(dst->metrics[RTAX_RTTVAR-1] - m)>>2;
(dst_metric(dst, RTAX_RTTVAR) - m)>>2;
}

if (tp->snd_ssthresh >= 0xFFFF) {
Expand All @@ -788,21 +789,21 @@ void tcp_update_metrics(struct sock *sk)
dst->metrics[RTAX_SSTHRESH-1] =
max(tp->snd_cwnd >> 1, tp->snd_ssthresh);
if (!dst_metric_locked(dst, RTAX_CWND))
dst->metrics[RTAX_CWND-1] = (dst->metrics[RTAX_CWND-1] + tp->snd_cwnd) >> 1;
dst->metrics[RTAX_CWND-1] = (dst_metric(dst, RTAX_CWND) + tp->snd_cwnd) >> 1;
} else {
/* Else slow start did not finish, cwnd is non-sense,
ssthresh may be also invalid.
*/
if (!dst_metric_locked(dst, RTAX_CWND))
dst->metrics[RTAX_CWND-1] = (dst->metrics[RTAX_CWND-1] + tp->snd_ssthresh) >> 1;
if (dst->metrics[RTAX_SSTHRESH-1] &&
dst->metrics[RTAX_CWND-1] = (dst_metric(dst, RTAX_CWND) + tp->snd_ssthresh) >> 1;
if (dst_metric(dst, RTAX_SSTHRESH) &&
!dst_metric_locked(dst, RTAX_SSTHRESH) &&
tp->snd_ssthresh > dst->metrics[RTAX_SSTHRESH-1])
tp->snd_ssthresh > dst_metric(dst, RTAX_SSTHRESH))
dst->metrics[RTAX_SSTHRESH-1] = tp->snd_ssthresh;
}

if (!dst_metric_locked(dst, RTAX_REORDERING)) {
if (dst->metrics[RTAX_REORDERING-1] < tp->reordering &&
if (dst_metric(dst, RTAX_REORDERING) < tp->reordering &&
tp->reordering != sysctl_tcp_reordering)
dst->metrics[RTAX_REORDERING-1] = tp->reordering;
}
Expand Down
6 changes: 3 additions & 3 deletions net/ipv6/route.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1243,11 +1243,11 @@ int ip6_route_add(struct fib6_config *cfg)
}
}

if (rt->u.dst.metrics[RTAX_HOPLIMIT-1] == 0)
if (dst_metric(&rt->u.dst, RTAX_HOPLIMIT) == 0)
rt->u.dst.metrics[RTAX_HOPLIMIT-1] = -1;
if (!rt->u.dst.metrics[RTAX_MTU-1])
if (!dst_metric(&rt->u.dst, RTAX_MTU))
rt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(dev);
if (!rt->u.dst.metrics[RTAX_ADVMSS-1])
if (!dst_metric(&rt->u.dst, RTAX_ADVMSS))
rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, dst_mtu(&rt->u.dst));
rt->u.dst.dev = dev;
rt->rt6i_idev = idev;
Expand Down

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