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>

diff --git a/Documentation/networking/packet_mmap.txt b/Documentation/networking/packet_mmap.txt
index a22fd85..09ab0d2 100644 (file)
--- a/Documentation/networking/packet_mmap.txt
+++ b/Documentation/networking/packet_mmap.txt
@@ -2,7 +2,7 @@
 + ABSTRACT
 --------------------------------------------------------------------------------
 
-This file documents the CONFIG_PACKET_MMAP option available with the PACKET
+This file documents the mmap() facility available with the PACKET
 socket interface on 2.4 and 2.6 kernels. This type of sockets is used for 
 capture network traffic with utilities like tcpdump or any other that needs
 raw access to network interface.
@@ -44,7 +44,7 @@ enabled. For transmission, check the MTU (Maximum Transmission Unit) used and
 supported by devices of your network.
 
 --------------------------------------------------------------------------------
-+ How to use CONFIG_PACKET_MMAP to improve capture process
++ How to use mmap() to improve capture process
 --------------------------------------------------------------------------------
 
 From the user standpoint, you should use the higher level libpcap library, which
@@ -64,7 +64,7 @@ the low level details or want to improve libpcap by including PACKET_MMAP
 support.
 
 --------------------------------------------------------------------------------
-+ How to use CONFIG_PACKET_MMAP directly to improve capture process
++ How to use mmap() directly to improve capture process
 --------------------------------------------------------------------------------
 
 From the system calls stand point, the use of PACKET_MMAP involves
@@ -105,7 +105,7 @@ also the mapping of the circular buffer in the user process and
 the use of this buffer.
 
 --------------------------------------------------------------------------------
-+ How to use CONFIG_PACKET_MMAP directly to improve transmission process
++ How to use mmap() directly to improve transmission process
 --------------------------------------------------------------------------------
 Transmission process is similar to capture as shown below.
 

diff --git a/net/packet/Kconfig b/net/packet/Kconfig
index 34ff93f..0060e3b 100644 (file)
--- 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 178e293..6ecb426 100644 (file)
--- 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,