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net/ipv6: Move dst flags to booleans in fib entries

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Continuing to wean FIB paths off of dst_entry, use a bool to hold
requests for certain dst settings. Add a helper to convert the
flags to DST flags when a FIB entry is converted to a dst_entry.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern 2018-04-17 17:33:20 -07:00 committed by David S. Miller
parent dec9b0e295
commit 3b6761d18b
3 changed files with 30 additions and 8 deletions
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5
include/net/ip6_fib.h
View file

@ -177,7 +177,10 @@ struct rt6_info {
u8 fib6_type;
u8 exception_bucket_flushed:1,
should_flush:1,
unused:6;
dst_nocount:1,
dst_nopolicy:1,
dst_host:1,
unused:3;
unsigned long expires;
struct dst_metrics *fib6_metrics;

4
net/ipv6/addrconf.c
View file

@ -1046,7 +1046,7 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
if (net->ipv6.devconf_all->disable_policy ||
idev->cnf.disable_policy)
rt->dst.flags |= DST_NOPOLICY;
rt->dst_nopolicy = true;
neigh_parms_data_state_setall(idev->nd_parms);
@ -5981,7 +5981,7 @@ void addrconf_disable_policy_idev(struct inet6_dev *idev, int val)
int cpu;
rcu_read_lock();
addrconf_set_nopolicy(ifa->rt, val);
ifa->rt->dst_nopolicy = val ? true : false;
if (rt->rt6i_pcpu) {
for_each_possible_cpu(cpu) {
struct rt6_info **rtp;

29
net/ipv6/route.c
View file

@ -937,6 +937,20 @@ static int ip6_rt_type_to_error(u8 fib6_type)
return fib6_prop[fib6_type];
}
static unsigned short fib6_info_dst_flags(struct rt6_info *rt)
{
unsigned short flags = 0;
if (rt->dst_nocount)
flags |= DST_NOCOUNT;
if (rt->dst_nopolicy)
flags |= DST_NOPOLICY;
if (rt->dst_host)
flags |= DST_HOST;
return flags;
}
static void ip6_rt_init_dst_reject(struct rt6_info *rt, struct rt6_info *ort)
{
rt->dst.error = ip6_rt_type_to_error(ort->fib6_type);
@ -961,6 +975,8 @@ static void ip6_rt_init_dst_reject(struct rt6_info *rt, struct rt6_info *ort)
static void ip6_rt_init_dst(struct rt6_info *rt, struct rt6_info *ort)
{
rt->dst.flags |= fib6_info_dst_flags(ort);
if (ort->rt6i_flags & RTF_REJECT) {
ip6_rt_init_dst_reject(rt, ort);
return;
@ -970,7 +986,6 @@ static void ip6_rt_init_dst(struct rt6_info *rt, struct rt6_info *ort)
rt->dst.output = ip6_output;
if (ort->fib6_type == RTN_LOCAL) {
rt->dst.flags |= DST_HOST;
rt->dst.input = ip6_input;
} else if (ipv6_addr_type(&ort->rt6i_dst.addr) & IPV6_ADDR_MULTICAST) {
rt->dst.input = ip6_mc_input;
@ -1058,10 +1073,11 @@ static bool ip6_hold_safe(struct net *net, struct rt6_info **prt,
/* called with rcu_lock held */
static struct rt6_info *ip6_create_rt_rcu(struct rt6_info *rt)
{
unsigned short flags = fib6_info_dst_flags(rt);
struct net_device *dev = rt->fib6_nh.nh_dev;
struct rt6_info *nrt;
nrt = __ip6_dst_alloc(dev_net(dev), dev, 0);
nrt = __ip6_dst_alloc(dev_net(dev), dev, flags);
if (nrt)
ip6_rt_copy_init(nrt, rt);
@ -1229,12 +1245,13 @@ static struct rt6_info *ip6_rt_cache_alloc(struct rt6_info *ort,
static struct rt6_info *ip6_rt_pcpu_alloc(struct rt6_info *rt)
{
unsigned short flags = fib6_info_dst_flags(rt);
struct net_device *dev;
struct rt6_info *pcpu_rt;
rcu_read_lock();
dev = ip6_rt_get_dev_rcu(rt);
pcpu_rt = __ip6_dst_alloc(dev_net(dev), dev, rt->dst.flags);
pcpu_rt = __ip6_dst_alloc(dev_net(dev), dev, flags);
rcu_read_unlock();
if (!pcpu_rt)
return NULL;
@ -2965,7 +2982,7 @@ static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg,
ipv6_addr_prefix(&rt->rt6i_dst.addr, &cfg->fc_dst, cfg->fc_dst_len);
rt->rt6i_dst.plen = cfg->fc_dst_len;
if (rt->rt6i_dst.plen == 128)
rt->dst.flags |= DST_HOST;
rt->dst_host = true;
#ifdef CONFIG_IPV6_SUBTREES
ipv6_addr_prefix(&rt->rt6i_src.addr, &cfg->fc_src, cfg->fc_src_len);
@ -3626,10 +3643,12 @@ struct rt6_info *addrconf_dst_alloc(struct net *net,
if (!rt)
return ERR_PTR(-ENOMEM);
rt->dst_nocount = true;
in6_dev_hold(idev);
rt->rt6i_idev = idev;
rt->dst.flags |= DST_HOST;
rt->dst_host = true;
rt->rt6i_protocol = RTPROT_KERNEL;
rt->rt6i_flags = RTF_UP | RTF_NONEXTHOP;
if (anycast) {