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ipv6: ipcm6_cookie initializer 

Initialize the cookie in one location to reduce code duplication and
avoid bugs from inconsistent initialization, such as that fixed in
commit 9887cba199 ("ip: limit use of gso_size to udp").

Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Willem de Bruijn 2018-07-06 10:12:55 -04:00 committed by David S. Miller
parent 351782067b
commit b515430ac9
6 changed files with 25 additions and 18 deletions
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19
include/net/ipv6.h
View File

@ -301,6 +301,25 @@ struct ipcm6_cookie {
__u16 gso_size;
};
static inline void ipcm6_init(struct ipcm6_cookie *ipc6)
{
*ipc6 = (struct ipcm6_cookie) {
.hlimit = -1,
.tclass = -1,
.dontfrag = -1,
};
}
static inline void ipcm6_init_sk(struct ipcm6_cookie *ipc6,
const struct ipv6_pinfo *np)
{
*ipc6 = (struct ipcm6_cookie) {
.hlimit = -1,
.tclass = np->tclass,
.dontfrag = np->dontfrag,
};
}
static inline struct ipv6_txoptions *txopt_get(const struct ipv6_pinfo *np)
{
struct ipv6_txoptions *opt;

7
net/ipv6/icmp.c
View File

@ -545,7 +545,7 @@ static void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info,
else if (!fl6.flowi6_oif)
fl6.flowi6_oif = np->ucast_oif;
ipc6.tclass = np->tclass;
ipcm6_init_sk(&ipc6, np);
fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel);
dst = icmpv6_route_lookup(net, skb, sk, &fl6);
@ -553,8 +553,6 @@ static void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info,
goto out;
ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
ipc6.dontfrag = np->dontfrag;
ipc6.opt = NULL;
msg.skb = skb;
msg.offset = skb_network_offset(skb);
@ -726,10 +724,9 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
msg.offset = 0;
msg.type = ICMPV6_ECHO_REPLY;
ipcm6_init_sk(&ipc6, np);
ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
ipc6.tclass = ipv6_get_dsfield(ipv6_hdr(skb));
ipc6.dontfrag = np->dontfrag;
ipc6.opt = NULL;
if (ip6_append_data(sk, icmpv6_getfrag, &msg,
skb->len + sizeof(struct icmp6hdr),

4
net/ipv6/ping.c
View File

@ -119,7 +119,7 @@ static int ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
fl6.fl6_icmp_code = user_icmph.icmp6_code;
security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
ipc6.tclass = np->tclass;
ipcm6_init_sk(&ipc6, np);
fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel);
dst = ip6_sk_dst_lookup_flow(sk, &fl6, daddr, false);
@ -142,8 +142,6 @@ static int ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
pfh.family = AF_INET6;
ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
ipc6.dontfrag = np->dontfrag;
ipc6.opt = NULL;
lock_sock(sk);
err = ip6_append_data(sk, ping_getfrag, &pfh, len,

5
net/ipv6/raw.c
View File

@ -791,10 +791,7 @@ static int rawv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
fl6.flowi6_mark = sk->sk_mark;
fl6.flowi6_uid = sk->sk_uid;
ipc6.hlimit = -1;
ipc6.tclass = -1;
ipc6.dontfrag = -1;
ipc6.opt = NULL;
ipcm6_init(&ipc6);
if (sin6) {
if (addr_len < SIN6_LEN_RFC2133)

4
net/ipv6/udp.c
View File

@ -1143,9 +1143,7 @@ int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
int (*getfrag)(void *, char *, int, int, int, struct sk_buff *);
struct sockcm_cookie sockc;
ipc6.hlimit = -1;
ipc6.tclass = -1;
ipc6.dontfrag = -1;
ipcm6_init(&ipc6);
ipc6.gso_size = up->gso_size;
sockc.tsflags = sk->sk_tsflags;
sockc.transmit_time = 0;

4
net/l2tp/l2tp_ip6.c
View File

@ -525,9 +525,7 @@ static int l2tp_ip6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
fl6.flowi6_mark = sk->sk_mark;
fl6.flowi6_uid = sk->sk_uid;
ipc6.hlimit = -1;
ipc6.tclass = -1;
ipc6.dontfrag = -1;
ipcm6_init(&ipc6);
if (lsa) {
if (addr_len < SIN6_LEN_RFC2133)