From: Willem de Bruijn <will...@google.com>
Initialize the cookie in one location to reduce code duplication and
avoid bugs from inconsistent initialization, such as that fixed in
commit 9887cba19978 ("ip: limit use of gso_size to udp").
Signed-off-by: Willem de Bruijn <will...@google.com>
---
include/net/ipv6.h | 19 +++++++++++++++++++
net/ipv6/icmp.c | 7 ++-----
net/ipv6/ping.c | 4 +---
net/ipv6/raw.c | 5 +----
net/ipv6/udp.c | 4 +---
net/l2tp/l2tp_ip6.c | 4 +---
6 files changed, 25 insertions(+), 18 deletions(-)
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index b7843e0b16ee..6cb247f54d4c 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -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;
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index be491bf6ab6e..d99fed67cd10 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -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),
diff --git a/net/ipv6/ping.c b/net/ipv6/ping.c
index 96f56bf49a30..717e7c1fba29 100644
--- a/net/ipv6/ping.c
+++ b/net/ipv6/ping.c
@@ -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,
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 5737c50f16eb..5f40670271ee 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -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)
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index ac6fc6728903..940115da9843 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -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;
diff --git a/net/l2tp/l2tp_ip6.c b/net/l2tp/l2tp_ip6.c
index 957369192ca1..38f80691f4ab 100644
--- a/net/l2tp/l2tp_ip6.c
+++ b/net/l2tp/l2tp_ip6.c
@@ -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)
--
2.18.0.399.gad0ab374a1-goog
