packet: Kill CONFIG_PACKET_MMAP.

Early on this was an experimental facility that few
people other than Alexey Kuznetsov played with.

Now it's a pretty fundamental thing and as people add
more features to AF_PACKET sockets this config options
creates ifdef spaghetti.

So kill it off.

Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 0 insertions, 39 deletions

diff --git a/net/packet/Kconfig b/net/packet/Kconfig
index 34ff93ff894d..0060e3b396b7 100644
--- a/net/packet/Kconfig
+++ b/net/packet/Kconfig
@@ -14,13 +14,3 @@ config PACKET
           be called af_packet.
 
           If unsure, say Y.
-
-config PACKET_MMAP
-        bool "Packet socket: mmapped IO"
-        depends on PACKET
-        help
-          If you say Y here, the Packet protocol driver will use an IO
-          mechanism that results in faster communication.
-
-          If unsure, say N.
-
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 178e2937bbaa..6ecb426bc0cf 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -157,7 +157,6 @@ struct packet_mreq_max {
         unsigned char   mr_address[MAX_ADDR_LEN];
 };
 
-#ifdef CONFIG_PACKET_MMAP
 static int packet_set_ring(struct sock *sk, struct tpacket_req *req,
                 int closing, int tx_ring);
 
@@ -177,7 +176,6 @@ struct packet_ring_buffer {
 
 struct packet_sock;
 static int tpacket_snd(struct packet_sock *po, struct msghdr *msg);
-#endif
 
 static void packet_flush_mclist(struct sock *sk);
 
@@ -185,11 +183,9 @@ struct packet_sock {
         /* struct sock has to be the first member of packet_sock */
         struct sock             sk;
         struct tpacket_stats    stats;
-#ifdef CONFIG_PACKET_MMAP
         struct packet_ring_buffer       rx_ring;
         struct packet_ring_buffer       tx_ring;
         int                     copy_thresh;
-#endif
         spinlock_t              bind_lock;
         struct mutex            pg_vec_lock;
         unsigned int            running:1,      /* prot_hook is attached*/
@@ -199,13 +195,11 @@ struct packet_sock {
         int                     ifindex;        /* bound device         */
         __be16                  num;
         struct packet_mclist    *mclist;
-#ifdef CONFIG_PACKET_MMAP
         atomic_t                mapped;
         enum tpacket_versions   tp_version;
         unsigned int            tp_hdrlen;
         unsigned int            tp_reserve;
         unsigned int            tp_loss:1;
-#endif
         struct packet_type      prot_hook ____cacheline_aligned_in_smp;
 };
 
@@ -219,8 +213,6 @@ struct packet_skb_cb {
 
 #define PACKET_SKB_CB(__skb)    ((struct packet_skb_cb *)((__skb)->cb))
 
-#ifdef CONFIG_PACKET_MMAP
-
 static void __packet_set_status(struct packet_sock *po, void *frame, int status)
 {
         union {
@@ -315,8 +307,6 @@ static inline void packet_increment_head(struct packet_ring_buffer *buff)
         buff->head = buff->head != buff->frame_max ? buff->head+1 : 0;
 }
 
-#endif
-
 static inline struct packet_sock *pkt_sk(struct sock *sk)
 {
         return (struct packet_sock *)sk;
@@ -640,7 +630,6 @@ drop:
         return 0;
 }
 
-#ifdef CONFIG_PACKET_MMAP
 static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev,
                        struct packet_type *pt, struct net_device *orig_dev)
 {
@@ -1056,7 +1045,6 @@ out:
         mutex_unlock(&po->pg_vec_lock);
         return err;
 }
-#endif
 
 static inline struct sk_buff *packet_alloc_skb(struct sock *sk, size_t prepad,
                                                size_t reserve, size_t len,
@@ -1248,13 +1236,11 @@ out:
 static int packet_sendmsg(struct kiocb *iocb, struct socket *sock,
                 struct msghdr *msg, size_t len)
 {
-#ifdef CONFIG_PACKET_MMAP
         struct sock *sk = sock->sk;
         struct packet_sock *po = pkt_sk(sk);
         if (po->tx_ring.pg_vec)
                 return tpacket_snd(po, msg);
         else
-#endif
                 return packet_snd(sock, msg, len);
 }
 
@@ -1268,9 +1254,7 @@ static int packet_release(struct socket *sock)
         struct sock *sk = sock->sk;
         struct packet_sock *po;
         struct net *net;
-#ifdef CONFIG_PACKET_MMAP
         struct tpacket_req req;
-#endif
 
         if (!sk)
                 return 0;
@@ -1299,7 +1283,6 @@ static int packet_release(struct socket *sock)
 
         packet_flush_mclist(sk);
 
-#ifdef CONFIG_PACKET_MMAP
         memset(&req, 0, sizeof(req));
 
         if (po->rx_ring.pg_vec)
@@ -1307,7 +1290,6 @@ static int packet_release(struct socket *sock)
 
         if (po->tx_ring.pg_vec)
                 packet_set_ring(sk, &req, 1, 1);
-#endif
 
         /*
          *      Now the socket is dead. No more input will appear.
@@ -1872,7 +1854,6 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
                 return ret;
         }
 
-#ifdef CONFIG_PACKET_MMAP
         case PACKET_RX_RING:
         case PACKET_TX_RING:
         {
@@ -1943,7 +1924,6 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
                 po->tp_loss = !!val;
                 return 0;
         }
-#endif
         case PACKET_AUXDATA:
         {
                 int val;
@@ -2041,7 +2021,6 @@ static int packet_getsockopt(struct socket *sock, int level, int optname,
 
                 data = &val;
                 break;
-#ifdef CONFIG_PACKET_MMAP
         case PACKET_VERSION:
                 if (len > sizeof(int))
                         len = sizeof(int);
@@ -2077,7 +2056,6 @@ static int packet_getsockopt(struct socket *sock, int level, int optname,
                 val = po->tp_loss;
                 data = &val;
                 break;
-#endif
         default:
                 return -ENOPROTOOPT;
         }
@@ -2197,11 +2175,6 @@ static int packet_ioctl(struct socket *sock, unsigned int cmd,
         return 0;
 }
 
-#ifndef CONFIG_PACKET_MMAP
-#define packet_mmap sock_no_mmap
-#define packet_poll datagram_poll
-#else
-
 static unsigned int packet_poll(struct file *file, struct socket *sock,
                                 poll_table *wait)
 {
@@ -2483,8 +2456,6 @@ out:
         mutex_unlock(&po->pg_vec_lock);
         return err;
 }
-#endif
-
 
 static const struct proto_ops packet_ops_spkt = {
         .family =       PF_PACKET,