From: David Ahern <dsahern@gmail.com>
To: netdev@vger.kernel.org
Cc: davem@davemloft.net, idosch@idosch.org,
roopa@cumulusnetworks.com, eric.dumazet@gmail.com,
weiwan@google.com, kafai@fb.com, yoshfuji@linux-ipv6.org,
David Ahern <dsahern@gmail.com>
Subject: [PATCH net-next v2 16/21] net/ipv6: Add gfp_flags to route add functions
Date: Tue, 17 Apr 2018 17:33:22 -0700 [thread overview]
Message-ID: <20180418003327.19992-17-dsahern@gmail.com> (raw)
In-Reply-To: <20180418003327.19992-1-dsahern@gmail.com>
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>
---
include/net/ip6_route.h | 6 ++++--
net/ipv6/addrconf.c | 39 +++++++++++++++++++++++----------------
net/ipv6/anycast.c | 2 +-
net/ipv6/route.c | 18 ++++++++++--------
4 files changed, 38 insertions(+), 27 deletions(-)
diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h
index cb6fb7e16a28..ff70266e30d7 100644
--- a/include/net/ip6_route.h
+++ b/include/net/ip6_route.h
@@ -100,7 +100,8 @@ void ip6_route_cleanup(void);
int ipv6_route_ioctl(struct net *net, unsigned int cmd, void __user *arg);
-int ip6_route_add(struct fib6_config *cfg, struct netlink_ext_ack *extack);
+int ip6_route_add(struct fib6_config *cfg, gfp_t gfp_flags,
+ struct netlink_ext_ack *extack);
int ip6_ins_rt(struct net *net, struct rt6_info *rt);
int ip6_del_rt(struct net *net, struct rt6_info *rt);
@@ -138,7 +139,8 @@ struct dst_entry *icmp6_dst_alloc(struct net_device *dev, struct flowi6 *fl6);
void fib6_force_start_gc(struct net *net);
struct rt6_info *addrconf_dst_alloc(struct net *net, struct inet6_dev *idev,
- const struct in6_addr *addr, bool anycast);
+ const struct in6_addr *addr, bool anycast,
+ gfp_t gfp_flags);
struct rt6_info *ip6_dst_alloc(struct net *net, struct net_device *dev,
int flags);
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index c8df5c6499db..915cd0734b27 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -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)
diff --git a/net/ipv6/anycast.c b/net/ipv6/anycast.c
index 1122fb299b86..e456386fe4d5 100644
--- a/net/ipv6/anycast.c
+++ b/net/ipv6/anycast.c
@@ -267,7 +267,7 @@ int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr)
}
net = dev_net(idev->dev);
- rt = addrconf_dst_alloc(net, idev, addr, true);
+ rt = addrconf_dst_alloc(net, idev, addr, true, GFP_ATOMIC);
if (IS_ERR(rt)) {
err = PTR_ERR(rt);
goto out;
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index d635d71f7d51..56a854b426a6 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -2866,6 +2866,7 @@ static int ip6_validate_gw(struct net *net, struct fib6_config *cfg,
}
static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg,
+ gfp_t gfp_flags,
struct netlink_ext_ack *extack)
{
struct net *net = cfg->fc_nlinfo.nl_net;
@@ -3086,12 +3087,13 @@ static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg,
return ERR_PTR(err);
}
-int ip6_route_add(struct fib6_config *cfg, struct netlink_ext_ack *extack)
+int ip6_route_add(struct fib6_config *cfg, gfp_t gfp_flags,
+ struct netlink_ext_ack *extack)
{
struct rt6_info *rt;
int err;
- rt = ip6_route_info_create(cfg, extack);
+ rt = ip6_route_info_create(cfg, gfp_flags, extack);
if (IS_ERR(rt))
return PTR_ERR(rt);
@@ -3418,7 +3420,7 @@ static struct rt6_info *rt6_add_route_info(struct net *net,
if (!prefixlen)
cfg.fc_flags |= RTF_DEFAULT;
- ip6_route_add(&cfg, NULL);
+ ip6_route_add(&cfg, GFP_ATOMIC, NULL);
return rt6_get_route_info(net, prefix, prefixlen, gwaddr, dev);
}
@@ -3469,7 +3471,7 @@ struct rt6_info *rt6_add_dflt_router(struct net *net,
cfg.fc_gateway = *gwaddr;
- if (!ip6_route_add(&cfg, NULL)) {
+ if (!ip6_route_add(&cfg, GFP_ATOMIC, NULL)) {
struct fib6_table *table;
table = fib6_get_table(dev_net(dev), cfg.fc_table);
@@ -3567,7 +3569,7 @@ int ipv6_route_ioctl(struct net *net, unsigned int cmd, void __user *arg)
rtnl_lock();
switch (cmd) {
case SIOCADDRT:
- err = ip6_route_add(&cfg, NULL);
+ err = ip6_route_add(&cfg, GFP_KERNEL, NULL);
break;
case SIOCDELRT:
err = ip6_route_del(&cfg, NULL);
@@ -3640,7 +3642,7 @@ static int ip6_pkt_prohibit_out(struct net *net, struct sock *sk, struct sk_buff
struct rt6_info *addrconf_dst_alloc(struct net *net,
struct inet6_dev *idev,
const struct in6_addr *addr,
- bool anycast)
+ bool anycast, gfp_t gfp_flags)
{
u32 tb_id;
struct net_device *dev = idev->dev;
@@ -4293,7 +4295,7 @@ static int ip6_route_multipath_add(struct fib6_config *cfg,
}
r_cfg.fc_flags |= (rtnh->rtnh_flags & RTNH_F_ONLINK);
- rt = ip6_route_info_create(&r_cfg, extack);
+ rt = ip6_route_info_create(&r_cfg, GFP_KERNEL, extack);
if (IS_ERR(rt)) {
err = PTR_ERR(rt);
rt = NULL;
@@ -4446,7 +4448,7 @@ static int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh,
if (cfg.fc_mp)
return ip6_route_multipath_add(&cfg, extack);
else
- return ip6_route_add(&cfg, extack);
+ return ip6_route_add(&cfg, GFP_KERNEL, extack);
}
static size_t rt6_nlmsg_size(struct rt6_info *rt)
--
2.11.0
next prev parent reply other threads:[~2018-04-18 0:33 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-18 0:33 [PATCH net-next v2 00/21] net/ipv6: Separate data structures for FIB and data path David Ahern
2018-04-18 0:33 ` [PATCH net-next v2 01/21] net: Move fib_convert_metrics to metrics file David Ahern
2018-04-18 0:33 ` [PATCH net-next v2 02/21] net: Handle null dst in rtnl_put_cacheinfo David Ahern
2018-04-18 0:33 ` [PATCH net-next v2 03/21] vrf: Move fib6_table into net_vrf David Ahern
2018-04-18 0:33 ` [PATCH net-next v2 04/21] net/ipv6: Pass net to fib6_update_sernum David Ahern
2018-04-18 0:33 ` [PATCH net-next v2 05/21] net/ipv6: Pass net namespace to route functions David Ahern
2018-04-18 0:33 ` [PATCH net-next v2 06/21] net/ipv6: Move support functions up in route.c David Ahern
2018-04-18 0:33 ` [PATCH net-next v2 07/21] net/ipv6: Save route type in rt6_info David Ahern
2018-04-18 0:33 ` [PATCH net-next v2 08/21] net/ipv6: Move nexthop data to fib6_nh David Ahern
2018-04-18 0:33 ` [PATCH net-next v2 09/21] net/ipv6: Defer initialization of dst to data path David Ahern
2018-04-18 0:33 ` [PATCH net-next v2 10/21] net/ipv6: move metrics from dst to rt6_info David Ahern
2018-04-18 0:33 ` [PATCH net-next v2 11/21] net/ipv6: move expires into rt6_info David Ahern
2018-04-18 0:33 ` [PATCH net-next v2 12/21] net/ipv6: Add fib6_null_entry David Ahern
2018-04-18 0:33 ` [PATCH net-next v2 13/21] net/ipv6: Add rt6_info create function for ip6_pol_route_lookup David Ahern
2018-04-18 0:33 ` [PATCH net-next v2 14/21] net/ipv6: Move dst flags to booleans in fib entries David Ahern
2018-04-18 0:33 ` [PATCH net-next v2 15/21] net/ipv6: Create a neigh_lookup for FIB entries David Ahern
2018-04-18 0:33 ` David Ahern [this message]
2018-04-18 17:06 ` [PATCH net-next v2 16/21] net/ipv6: Add gfp_flags to route add functions Eric Dumazet
2018-04-18 17:10 ` David Ahern
2018-04-18 17:30 ` Eric Dumazet
2018-04-18 0:33 ` [PATCH net-next v2 17/21] net/ipv6: Cleanup exception and cache route handling David Ahern
2018-04-18 0:33 ` [PATCH net-next v2 18/21] net/ipv6: introduce fib6_info struct and helpers David Ahern
2018-04-18 0:33 ` [PATCH net-next v2 19/21] net/ipv6: separate handling of FIB entries from dst based routes David Ahern
2018-04-18 0:33 ` [PATCH net-next v2 20/21] net/ipv6: Flip FIB entries to fib6_info David Ahern
2018-04-18 0:33 ` [PATCH net-next v2 21/21] net/ipv6: Remove unused code and variables for rt6_info David Ahern
2018-04-18 3:45 ` [PATCH net-next v2 00/21] net/ipv6: Separate data structures for FIB and data path David Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180418003327.19992-17-dsahern@gmail.com \
--to=dsahern@gmail.com \
--cc=davem@davemloft.net \
--cc=eric.dumazet@gmail.com \
--cc=idosch@idosch.org \
--cc=kafai@fb.com \
--cc=netdev@vger.kernel.org \
--cc=roopa@cumulusnetworks.com \
--cc=weiwan@google.com \
--cc=yoshfuji@linux-ipv6.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).