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Revert "ipv6: save dontfrag in cork"

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This reverts commit 4f809be95d which is
commit a18dfa9925b9ef6107ea3aa5814ca3c704d34a8a upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I92d1731431ba8fdf5be8df5457bc73cd5ae4ffaf
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Greg Kroah-Hartman
2025-06-05 14:25:55 +00:00
parent b572d7f4f2
commit f23dc8c566
2 changed files with 4 additions and 6 deletions
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1
include/linux/ipv6.h
View File

@@ -206,7 +206,6 @@ struct inet6_cork {
struct ipv6_txoptions *opt;
u8 hop_limit;
u8 tclass;
u8 dontfrag:1;
};
/**

9
net/ipv6/ip6_output.c
View File

@@ -1450,7 +1450,6 @@ static int ip6_setup_cork(struct sock *sk, struct inet_cork_full *cork,
}
v6_cork->hop_limit = ipc6->hlimit;
v6_cork->tclass = ipc6->tclass;
v6_cork->dontfrag = ipc6->dontfrag;
if (rt->dst.flags & DST_XFRM_TUNNEL)
mtu = np->pmtudisc >= IPV6_PMTUDISC_PROBE ?
READ_ONCE(rt->dst.dev->mtu) : dst_mtu(&rt->dst);
@@ -1484,7 +1483,7 @@ static int __ip6_append_data(struct sock *sk,
int getfrag(void *from, char *to, int offset,
int len, int odd, struct sk_buff *skb),
void *from, size_t length, int transhdrlen,
unsigned int flags)
unsigned int flags, struct ipcm6_cookie *ipc6)
{
struct sk_buff *skb, *skb_prev = NULL;
struct inet_cork *cork = &cork_full->base;
@@ -1540,7 +1539,7 @@ static int __ip6_append_data(struct sock *sk,
if (headersize + transhdrlen > mtu)
goto emsgsize;
if (cork->length + length > mtu - headersize && v6_cork->dontfrag &&
if (cork->length + length > mtu - headersize && ipc6->dontfrag &&
(sk->sk_protocol == IPPROTO_UDP ||
sk->sk_protocol == IPPROTO_ICMPV6 ||
sk->sk_protocol == IPPROTO_RAW)) {
@@ -1885,7 +1884,7 @@ int ip6_append_data(struct sock *sk,
return __ip6_append_data(sk, &sk->sk_write_queue, &inet->cork,
&np->cork, sk_page_frag(sk), getfrag,
from, length, transhdrlen, flags);
from, length, transhdrlen, flags, ipc6);
}
EXPORT_SYMBOL_GPL(ip6_append_data);
@@ -2090,7 +2089,7 @@ struct sk_buff *ip6_make_skb(struct sock *sk,
err = __ip6_append_data(sk, &queue, cork, &v6_cork,
&current->task_frag, getfrag, from,
length + exthdrlen, transhdrlen + exthdrlen,
flags);
flags, ipc6);
if (err) {
__ip6_flush_pending_frames(sk, &queue, cork, &v6_cork);
return ERR_PTR(err);