diff options
| author | David Ahern <dsahern@gmail.com> | 2019-04-23 08:48:09 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-04-23 19:44:18 -0700 |
| commit | ecc5663cce8c7d7e4eba32af4e1e3cab296c64b9 (patch) | |
| tree | 603721eb5458c0346038f29141f1842db7b31e67 /net | |
| parent | ffa8ce54be3aaf6b15abae3bbd08282b867d3a4f (diff) | |
| download | linux-ecc5663cce8c7d7e4eba32af4e1e3cab296c64b9.tar.bz2 | |
net: Change nhc_flags to unsigned char
nhc_flags holds the RTNH_F flags for a given nexthop (fib{6}_nh).
All of the RTNH_F_ flags fit in an unsigned char, and since the API to
userspace (rtnh_flags and lower byte of rtm_flags) is 1 byte it can not
grow. Make nhc_flags in fib_nh_common an unsigned char and shrink the
size of the struct by 8, from 56 to 48 bytes.
Update the flags arguments for up netdevice events and fib_nexthop_info
which determines the RTNH_F flags to return on a dump/event. The RTNH_F
flags are passed in the lower byte of rtm_flags which is an unsigned int
so use a temp variable for the flags to fib_nexthop_info and combine
with rtm_flags in the caller.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/fib_semantics.c | 8 | ||||
| -rw-r--r-- | net/ipv6/route.c | 12 |
2 files changed, 12 insertions, 8 deletions
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c index c695e629fac2..4336f1ec8ab0 100644 --- a/net/ipv4/fib_semantics.c +++ b/net/ipv4/fib_semantics.c @@ -1444,7 +1444,7 @@ failure: } int fib_nexthop_info(struct sk_buff *skb, const struct fib_nh_common *nhc, - unsigned int *flags, bool skip_oif) + unsigned char *flags, bool skip_oif) { if (nhc->nhc_flags & RTNH_F_DEAD) *flags |= RTNH_F_DEAD; @@ -1520,7 +1520,7 @@ int fib_add_nexthop(struct sk_buff *skb, const struct fib_nh_common *nhc, { const struct net_device *dev = nhc->nhc_dev; struct rtnexthop *rtnh; - unsigned int flags = 0; + unsigned char flags = 0; rtnh = nla_reserve_nohdr(skb, sizeof(*rtnh)); if (!rtnh) @@ -1619,7 +1619,7 @@ int fib_dump_info(struct sk_buff *skb, u32 portid, u32 seq, int event, goto nla_put_failure; if (fi->fib_nhs == 1) { struct fib_nh *nh = &fi->fib_nh[0]; - unsigned int flags = 0; + unsigned char flags = 0; if (fib_nexthop_info(skb, &nh->nh_common, &flags, false) < 0) goto nla_put_failure; @@ -1902,7 +1902,7 @@ out: * Dead device goes up. We wake up dead nexthops. * It takes sense only on multipath routes. */ -int fib_sync_up(struct net_device *dev, unsigned int nh_flags) +int fib_sync_up(struct net_device *dev, unsigned char nh_flags) { struct fib_info *prev_fi; unsigned int hash; diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 923af51890ca..9c0127a44f9f 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -3912,7 +3912,7 @@ void rt6_clean_tohost(struct net *net, struct in6_addr *gateway) struct arg_netdev_event { const struct net_device *dev; union { - unsigned int nh_flags; + unsigned char nh_flags; unsigned long event; }; }; @@ -4025,7 +4025,7 @@ static int fib6_ifup(struct fib6_info *rt, void *p_arg) return 0; } -void rt6_sync_up(struct net_device *dev, unsigned int nh_flags) +void rt6_sync_up(struct net_device *dev, unsigned char nh_flags) { struct arg_netdev_event arg = { .dev = dev, @@ -4082,7 +4082,7 @@ static unsigned int rt6_multipath_dead_count(const struct fib6_info *rt, static void rt6_multipath_nh_flags_set(struct fib6_info *rt, const struct net_device *dev, - unsigned int nh_flags) + unsigned char nh_flags) { struct fib6_info *iter; @@ -4794,9 +4794,13 @@ static int rt6_fill_node(struct net *net, struct sk_buff *skb, nla_nest_end(skb, mp); } else { + unsigned char nh_flags = 0; + if (fib_nexthop_info(skb, &rt->fib6_nh.nh_common, - &rtm->rtm_flags, false) < 0) + &nh_flags, false) < 0) goto nla_put_failure; + + rtm->rtm_flags |= nh_flags; } if (rt6_flags & RTF_EXPIRES) { |