diff options
| author | Eric Dumazet <edumazet@google.com> | 2023-08-16 11:15:35 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-08-16 13:09:17 +0300 |
| commit | 6b5f43ea08150e7ff72f734545101c58489ead5b (patch) | |
| tree | 805b596ad9e4070ad6766a0e11b601d9a88edbac /net/ipv4/raw.c | |
| parent | b4d84bce4c437c4ac1b6f7ef4d612d7d52f62cfe (diff) | |
| download | linux-6b5f43ea08150e7ff72f734545101c58489ead5b.tar.xz | |
inet: move inet->recverr to inet->inet_flags
IP_RECVERR socket option can now be set/get without locking the socket.
This patch potentially avoid data-races around inet->recverr.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/raw.c')
| -rw-r--r-- | net/ipv4/raw.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c index e6e813f4aa31..f4c27dc5714b 100644 --- a/net/ipv4/raw.c +++ b/net/ipv4/raw.c @@ -203,8 +203,9 @@ static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info) struct inet_sock *inet = inet_sk(sk); const int type = icmp_hdr(skb)->type; const int code = icmp_hdr(skb)->code; - int err = 0; int harderr = 0; + bool recverr; + int err = 0; if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) ipv4_sk_update_pmtu(skb, sk, info); @@ -218,7 +219,8 @@ static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info) 2. Socket is connected (otherwise the error indication is useless without ip_recverr and error is hard. */ - if (!inet->recverr && sk->sk_state != TCP_ESTABLISHED) + recverr = inet_test_bit(RECVERR, sk); + if (!recverr && sk->sk_state != TCP_ESTABLISHED) return; switch (type) { @@ -245,7 +247,7 @@ static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info) } } - if (inet->recverr) { + if (recverr) { const struct iphdr *iph = (const struct iphdr *)skb->data; u8 *payload = skb->data + (iph->ihl << 2); @@ -254,7 +256,7 @@ static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info) ip_icmp_error(sk, skb, err, 0, info, payload); } - if (inet->recverr || harderr) { + if (recverr || harderr) { sk->sk_err = err; sk_error_report(sk); } @@ -413,7 +415,7 @@ error_free: kfree_skb(skb); error: IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS); - if (err == -ENOBUFS && !inet->recverr) + if (err == -ENOBUFS && !inet_test_bit(RECVERR, sk)) err = 0; return err; } @@ -645,7 +647,7 @@ back_from_confirm: ip_flush_pending_frames(sk); else if (!(msg->msg_flags & MSG_MORE)) { err = ip_push_pending_frames(sk, &fl4); - if (err == -ENOBUFS && !inet->recverr) + if (err == -ENOBUFS && !inet_test_bit(RECVERR, sk)) err = 0; } release_sock(sk); |