net: Eliminate no_check from protosw

It doesn't seem like an protocols are setting anything other
than the default, and allowing to arbitrarily disable checksums
for a whole protocol seems dangerous. This can be done on a per
socket basis.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

14 files changed, 0 insertions, 24 deletions

diff --git a/include/net/protocol.h b/include/net/protocol.h
index a7e986b08147..d6fcc1fcdb5b 100644
--- a/include/net/protocol.h
+++ b/include/net/protocol.h
@@ -86,7 +86,6 @@ struct inet_protosw {
         struct proto     *prot;
         const struct proto_ops *ops;
   
-        char             no_check;   /* checksum on rcv/xmit/none? */
         unsigned char    flags;      /* See INET_PROTOSW_* below.  */
 };
 #define INET_PROTOSW_REUSE 0x01      /* Are ports automatically reusable? */
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 22b5d818b200..6ca645c4b48e 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -1024,7 +1024,6 @@ static struct inet_protosw dccp_v4_protosw = {
         .protocol       = IPPROTO_DCCP,
         .prot           = &dccp_v4_prot,
         .ops            = &inet_dccp_ops,
-        .no_check       = 0,
         .flags          = INET_PROTOSW_ICSK,
 };
 
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 279132bcadd9..0e9bb08a91e4 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -254,7 +254,6 @@ static int inet_create(struct net *net, struct socket *sock, int protocol,
         struct inet_sock *inet;
         struct proto *answer_prot;
         unsigned char answer_flags;
-        char answer_no_check;
         int try_loading_module = 0;
         int err;
 
@@ -312,7 +311,6 @@ lookup_protocol:
 
         sock->ops = answer->ops;
         answer_prot = answer->prot;
-        answer_no_check = answer->no_check;
         answer_flags = answer->flags;
         rcu_read_unlock();
 
@@ -324,7 +322,6 @@ lookup_protocol:
                 goto out;
 
         err = 0;
-        sk->sk_no_check = answer_no_check;
         if (INET_PROTOSW_REUSE & answer_flags)
                 sk->sk_reuse = SK_CAN_REUSE;
 
@@ -1002,7 +999,6 @@ static struct inet_protosw inetsw_array[] =
                 .protocol =   IPPROTO_TCP,
                 .prot =       &tcp_prot,
                 .ops =        &inet_stream_ops,
-                .no_check =   0,
                 .flags =      INET_PROTOSW_PERMANENT |
                               INET_PROTOSW_ICSK,
         },
@@ -1012,7 +1008,6 @@ static struct inet_protosw inetsw_array[] =
                 .protocol =   IPPROTO_UDP,
                 .prot =       &udp_prot,
                 .ops =        &inet_dgram_ops,
-                .no_check =   UDP_CSUM_DEFAULT,
                 .flags =      INET_PROTOSW_PERMANENT,
        },
 
@@ -1021,7 +1016,6 @@ static struct inet_protosw inetsw_array[] =
                 .protocol =   IPPROTO_ICMP,
                 .prot =       &ping_prot,
                 .ops =        &inet_dgram_ops,
-                .no_check =   UDP_CSUM_DEFAULT,
                 .flags =      INET_PROTOSW_REUSE,
        },
 
@@ -1030,7 +1024,6 @@ static struct inet_protosw inetsw_array[] =
                .protocol =   IPPROTO_IP,        /* wild card */
                .prot =       &raw_prot,
                .ops =        &inet_sockraw_ops,
-               .no_check =   UDP_CSUM_DEFAULT,
                .flags =      INET_PROTOSW_REUSE,
        }
 };
diff --git a/net/ipv4/udplite.c b/net/ipv4/udplite.c
index 2c46acd4cc36..3b3efbda48e1 100644
--- a/net/ipv4/udplite.c
+++ b/net/ipv4/udplite.c
@@ -70,7 +70,6 @@ static struct inet_protosw udplite4_protosw = {
         .protocol       =  IPPROTO_UDPLITE,
         .prot           =  &udplite_prot,
         .ops            =  &inet_dgram_ops,
-        .no_check       =  0,           /* must checksum (RFC 3828) */
         .flags          =  INET_PROTOSW_PERMANENT,
 };
 
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index dc47cc757b80..7cb4392690dd 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -106,7 +106,6 @@ static int inet6_create(struct net *net, struct socket *sock, int protocol,
         struct inet_protosw *answer;
         struct proto *answer_prot;
         unsigned char answer_flags;
-        char answer_no_check;
         int try_loading_module = 0;
         int err;
 
@@ -162,7 +161,6 @@ lookup_protocol:
 
         sock->ops = answer->ops;
         answer_prot = answer->prot;
-        answer_no_check = answer->no_check;
         answer_flags = answer->flags;
         rcu_read_unlock();
 
@@ -176,7 +174,6 @@ lookup_protocol:
         sock_init_data(sock, sk);
 
         err = 0;
-        sk->sk_no_check = answer_no_check;
         if (INET_PROTOSW_REUSE & answer_flags)
                 sk->sk_reuse = SK_CAN_REUSE;
 
diff --git a/net/ipv6/ping.c b/net/ipv6/ping.c
index a2a1d80dfe0c..5b7a1ed2aba9 100644
--- a/net/ipv6/ping.c
+++ b/net/ipv6/ping.c
@@ -51,7 +51,6 @@ static struct inet_protosw pingv6_protosw = {
         .protocol =  IPPROTO_ICMPV6,
         .prot =      &pingv6_prot,
         .ops =       &inet6_dgram_ops,
-        .no_check =  UDP_CSUM_DEFAULT,
         .flags =     INET_PROTOSW_REUSE,
 };
 
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index dddfb5fa2b7a..b2dc60b0c764 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -1322,7 +1322,6 @@ static struct inet_protosw rawv6_protosw = {
         .protocol       = IPPROTO_IP,   /* wild card */
         .prot           = &rawv6_prot,
         .ops            = &inet6_sockraw_ops,
-        .no_check       = UDP_CSUM_DEFAULT,
         .flags          = INET_PROTOSW_REUSE,
 };
 
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index f07b2abba359..229239ad96b1 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1992,7 +1992,6 @@ static struct inet_protosw tcpv6_protosw = {
         .protocol       =       IPPROTO_TCP,
         .prot           =       &tcpv6_prot,
         .ops            =       &inet6_stream_ops,
-        .no_check       =       0,
         .flags          =       INET_PROTOSW_PERMANENT |
                                 INET_PROTOSW_ICSK,
 };
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 7edf096867c4..c7ed47bde54b 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1507,7 +1507,6 @@ static struct inet_protosw udpv6_protosw = {
         .protocol =  IPPROTO_UDP,
         .prot =      &udpv6_prot,
         .ops =       &inet6_dgram_ops,
-        .no_check =  UDP_CSUM_DEFAULT,
         .flags =     INET_PROTOSW_PERMANENT,
 };
 
diff --git a/net/ipv6/udplite.c b/net/ipv6/udplite.c
index dfcc4be46898..9cf097e206e9 100644
--- a/net/ipv6/udplite.c
+++ b/net/ipv6/udplite.c
@@ -64,7 +64,6 @@ static struct inet_protosw udplite6_protosw = {
         .protocol       = IPPROTO_UDPLITE,
         .prot           = &udplitev6_prot,
         .ops            = &inet6_dgram_ops,
-        .no_check       = 0,
         .flags          = INET_PROTOSW_PERMANENT,
 };
 
diff --git a/net/l2tp/l2tp_ip.c b/net/l2tp/l2tp_ip.c
index 3397fe6897c0..369a9822488c 100644
--- a/net/l2tp/l2tp_ip.c
+++ b/net/l2tp/l2tp_ip.c
@@ -606,7 +606,6 @@ static struct inet_protosw l2tp_ip_protosw = {
         .protocol       = IPPROTO_L2TP,
         .prot           = &l2tp_ip_prot,
         .ops            = &l2tp_ip_ops,
-        .no_check       = 0,
 };
 
 static struct net_protocol l2tp_ip_protocol __read_mostly = {
diff --git a/net/l2tp/l2tp_ip6.c b/net/l2tp/l2tp_ip6.c
index e472d44a3b91..f3f98a156cee 100644
--- a/net/l2tp/l2tp_ip6.c
+++ b/net/l2tp/l2tp_ip6.c
@@ -755,7 +755,6 @@ static struct inet_protosw l2tp_ip6_protosw = {
         .protocol       = IPPROTO_L2TP,
         .prot           = &l2tp_ip6_prot,
         .ops            = &l2tp_ip6_ops,
-        .no_check       = 0,
 };
 
 static struct inet6_protocol l2tp_ip6_protocol __read_mostly = {
diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index 4dc5d9e08311..1999592ba88c 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -943,7 +943,6 @@ static struct inet_protosw sctpv6_seqpacket_protosw = {
         .protocol      = IPPROTO_SCTP,
         .prot          = &sctpv6_prot,
         .ops           = &inet6_seqpacket_ops,
-        .no_check      = 0,
         .flags         = SCTP_PROTOSW_FLAG
 };
 static struct inet_protosw sctpv6_stream_protosw = {
@@ -951,7 +950,6 @@ static struct inet_protosw sctpv6_stream_protosw = {
         .protocol      = IPPROTO_SCTP,
         .prot          = &sctpv6_prot,
         .ops           = &inet6_seqpacket_ops,
-        .no_check      = 0,
         .flags         = SCTP_PROTOSW_FLAG,
 };
 
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index af5afca4b85a..6789d785e698 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -1017,7 +1017,6 @@ static struct inet_protosw sctp_seqpacket_protosw = {
         .protocol   = IPPROTO_SCTP,
         .prot       = &sctp_prot,
         .ops        = &inet_seqpacket_ops,
-        .no_check   = 0,
         .flags      = SCTP_PROTOSW_FLAG
 };
 static struct inet_protosw sctp_stream_protosw = {
@@ -1025,7 +1024,6 @@ static struct inet_protosw sctp_stream_protosw = {
         .protocol   = IPPROTO_SCTP,
         .prot       = &sctp_prot,
         .ops        = &inet_seqpacket_ops,
-        .no_check   = 0,
         .flags      = SCTP_PROTOSW_FLAG
 };