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net/ipv6: Add gfp_flags to route add functions

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Most FIB entries can be added using memory allocated with GFP_KERNEL.
Add gfp_flags to ip6_route_add and addrconf_dst_alloc. Code paths that
can be reached from the packet path (e.g., ndisc and autoconfig) or
atomic notifiers use GFP_ATOMIC; paths from user context (adding
addresses and routes) use GFP_KERNEL.

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 17:33:22 -07:00
committed by David S. Miller
parent f8a1b43b70
commit acb54e3cba
4 changed files with 38 additions and 27 deletions
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39
net/ipv6/addrconf.c
View File

@@ -1037,7 +1037,7 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
goto out;
}
rt = addrconf_dst_alloc(net, idev, addr, false);
rt = addrconf_dst_alloc(net, idev, addr, false, gfp_flags);
if (IS_ERR(rt)) {
err = PTR_ERR(rt);
rt = NULL;
@@ -2320,7 +2320,7 @@ static void ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpad
static void
addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
unsigned long expires, u32 flags)
unsigned long expires, u32 flags, gfp_t gfp_flags)
{
struct fib6_config cfg = {
.fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX,
@@ -2345,7 +2345,7 @@ addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
cfg.fc_flags |= RTF_NONEXTHOP;
#endif
ip6_route_add(&cfg, NULL);
ip6_route_add(&cfg, gfp_flags, NULL);
}
@@ -2401,7 +2401,7 @@ static void addrconf_add_mroute(struct net_device *dev)
ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
ip6_route_add(&cfg, NULL);
ip6_route_add(&cfg, GFP_ATOMIC, NULL);
}
static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
@@ -2685,7 +2685,7 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
expires = jiffies_to_clock_t(rt_expires);
}
addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
dev, expires, flags);
dev, expires, flags, GFP_ATOMIC);
}
ip6_rt_put(rt);
}
@@ -2900,7 +2900,7 @@ static int inet6_addr_add(struct net *net, int ifindex,
if (!IS_ERR(ifp)) {
if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) {
addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
expires, flags);
expires, flags, GFP_KERNEL);
}
/* Send a netlink notification if DAD is enabled and
@@ -3053,7 +3053,8 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
if (addr.s6_addr32[3]) {
add_addr(idev, &addr, plen, scope);
addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags);
addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags,
GFP_ATOMIC);
return;
}
@@ -3078,7 +3079,7 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
add_addr(idev, &addr, plen, flag);
addrconf_prefix_route(&addr, plen, idev->dev, 0,
pflags);
pflags, GFP_ATOMIC);
}
}
}
@@ -3118,7 +3119,8 @@ void addrconf_add_linklocal(struct inet6_dev *idev,
ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags,
INFINITY_LIFE_TIME, INFINITY_LIFE_TIME, true, NULL);
if (!IS_ERR(ifp)) {
addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev,
0, 0, GFP_ATOMIC);
addrconf_dad_start(ifp);
in6_ifa_put(ifp);
}
@@ -3233,7 +3235,8 @@ static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route)
addrconf_add_linklocal(idev, &addr,
IFA_F_STABLE_PRIVACY);
else if (prefix_route)
addrconf_prefix_route(&addr, 64, idev->dev, 0, 0);
addrconf_prefix_route(&addr, 64, idev->dev,
0, 0, GFP_KERNEL);
break;
case IN6_ADDR_GEN_MODE_EUI64:
/* addrconf_add_linklocal also adds a prefix_route and we
@@ -3243,7 +3246,8 @@ static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route)
if (ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) == 0)
addrconf_add_linklocal(idev, &addr, 0);
else if (prefix_route)
addrconf_prefix_route(&addr, 64, idev->dev, 0, 0);
addrconf_prefix_route(&addr, 64, idev->dev,
0, 0, GFP_ATOMIC);
break;
case IN6_ADDR_GEN_MODE_NONE:
default:
@@ -3346,7 +3350,8 @@ static int fixup_permanent_addr(struct net *net,
if (!ifp->rt || !ifp->rt->rt6i_node) {
struct rt6_info *rt, *prev;
rt = addrconf_dst_alloc(net, idev, &ifp->addr, false);
rt = addrconf_dst_alloc(net, idev, &ifp->addr, false,
GFP_ATOMIC);
if (IS_ERR(rt))
return PTR_ERR(rt);
@@ -3361,7 +3366,7 @@ static int fixup_permanent_addr(struct net *net,
if (!(ifp->flags & IFA_F_NOPREFIXROUTE)) {
addrconf_prefix_route(&ifp->addr, ifp->prefix_len,
idev->dev, 0, 0);
idev->dev, 0, 0, GFP_ATOMIC);
}
if (ifp->state == INET6_IFADDR_STATE_PREDAD)
@@ -4572,8 +4577,9 @@ static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags,
ipv6_ifa_notify(0, ifp);
if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) {
addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
expires, flags);
addrconf_prefix_route(&ifp->addr, ifp->prefix_len,
ifp->idev->dev, expires, flags,
GFP_KERNEL);
} else if (had_prefixroute) {
enum cleanup_prefix_rt_t action;
unsigned long rt_expires;
@@ -5614,7 +5620,8 @@ static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
addrconf_join_anycast(ifp);
if (!ipv6_addr_any(&ifp->peer_addr))
addrconf_prefix_route(&ifp->peer_addr, 128,
ifp->idev->dev, 0, 0);
ifp->idev->dev, 0, 0,
GFP_KERNEL);
break;
case RTM_DELADDR:
if (ifp->idev->cnf.forwarding)