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openwrt-xburst/target/linux/linux-2.4/patches/generic/223-pf_ring.patch

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add pf_ring patches for kernel and libpcap git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@2266 3c298f89-4303-0410-b956-a3cf2f4a3e73
2005-10-23 01:03:56 +03:00
diff --unified --recursive --new-file linux-2.4.30/include/linux/ring.h linux-2.4.30-1-686-smp-ring3/include/linux/ring.h
--- linux-2.4.30/include/linux/ring.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.4.30-1-686-smp-ring3/include/linux/ring.h 2005-10-22 23:08:27.388011250 +0200
@@ -0,0 +1,108 @@
+/*
+ * Definitions for packet ring
+ *
+ * 2004 - Luca Deri <deri@ntop.org>
+ */
+#ifndef __RING_H
+#define __RING_H
+
+
+#define INCLUDE_MAC_INFO
+
+#ifdef INCLUDE_MAC_INFO
+#define SKB_DISPLACEMENT 14 /* Include MAC address information */
+#else
+#define SKB_DISPLACEMENT 0 /* Do NOT include MAC address information */
+#endif
+
+#define RING_MAGIC
+#define RING_MAGIC_VALUE 0x88
+#define RING_FLOWSLOT_VERSION 5
+#define RING_VERSION "3.0"
+
+#define SO_ADD_TO_CLUSTER 99
+#define SO_REMOVE_FROM_CLUSTER 100
+#define SO_SET_REFLECTOR 101
+
+/* *********************************** */
+
+#ifndef HAVE_PCAP
+struct pcap_pkthdr {
+ struct timeval ts; /* time stamp */
+ u_int32_t caplen; /* length of portion present */
+ u_int32_t len; /* length this packet (off wire) */
+};
+#endif
+
+/* *********************************** */
+
+enum cluster_type {
+ cluster_per_flow = 0,
+ cluster_round_robin
+};
+
+/* *********************************** */
+
+#define RING_MIN_SLOT_SIZE (60+sizeof(struct pcap_pkthdr))
+#define RING_MAX_SLOT_SIZE (1514+sizeof(struct pcap_pkthdr))
+
+/* *********************************** */
+
+typedef struct flowSlotInfo {
+ u_int16_t version, sample_rate;
+ u_int32_t tot_slots, slot_len, tot_mem;
+
+ u_int64_t tot_pkts, tot_lost;
+ u_int64_t tot_insert, tot_read;
+ u_int16_t insert_idx;
+ u_int16_t remove_idx;
+} FlowSlotInfo;
+
+/* *********************************** */
+
+typedef struct flowSlot {
+#ifdef RING_MAGIC
+ u_char magic; /* It must alwasy be zero */
+#endif
+ u_char slot_state; /* 0=empty, 1=full */
+ u_char bucket; /* bucket[bucketLen] */
+} FlowSlot;
+
+/* *********************************** */
+
+#ifdef __KERNEL__
+
+FlowSlotInfo* getRingPtr(void);
+int allocateRing(char *deviceName, u_int numSlots,
+ u_int bucketLen, u_int sampleRate);
+unsigned int pollRing(struct file *fp, struct poll_table_struct * wait);
+void deallocateRing(void);
+
+/* ************************* */
+
+typedef int (*handle_ring_skb)(struct sk_buff *skb,
+ u_char recv_packet, u_char real_skb);
+extern handle_ring_skb get_skb_ring_handler(void);
+extern void set_skb_ring_handler(handle_ring_skb the_handler);
+extern void do_skb_ring_handler(struct sk_buff *skb,
+ u_char recv_packet, u_char real_skb);
+
+typedef int (*handle_ring_buffer)(struct net_device *dev,
+ char *data, int len);
+extern handle_ring_buffer get_buffer_ring_handler(void);
+extern void set_buffer_ring_handler(handle_ring_buffer the_handler);
+extern int do_buffer_ring_handler(struct net_device *dev,
+ char *data, int len);
+#endif /* __KERNEL__ */
+
+/* *********************************** */
+
+#define PF_RING 27 /* Packet Ring */
+#define SOCK_RING PF_RING
+
+/* ioctl() */
+#define SIORINGPOLL 0x8888
+
+/* *********************************** */
+
+#endif /* __RING_H */
diff --unified --recursive --new-file linux-2.4.30/include/net/sock.h linux-2.4.30-1-686-smp-ring3/include/net/sock.h
--- linux-2.4.30/include/net/sock.h 2004-11-17 12:54:22.000000000 +0100
+++ linux-2.4.30-1-686-smp-ring3/include/net/sock.h 2005-10-22 23:08:27.976048000 +0200
@@ -699,6 +699,9 @@
#if defined (CONFIG_PACKET) || defined(CONFIG_PACKET_MODULE)
struct packet_opt *af_packet;
#endif
+#if defined(CONFIG_RING) || defined(CONFIG_RING_MODULE)
+ struct ring_opt *pf_ring;
+#endif
#if defined(CONFIG_X25) || defined(CONFIG_X25_MODULE)
x25_cb *x25;
#endif
diff --unified --recursive --new-file linux-2.4.30/include/net/sock.h.ORG linux-2.4.30-1-686-smp-ring3/include/net/sock.h.ORG
--- linux-2.4.30/include/net/sock.h.ORG 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.4.30-1-686-smp-ring3/include/net/sock.h.ORG 2005-10-22 23:08:27.940045750 +0200
@@ -0,0 +1,1400 @@
+/*
+ * INET An implementation of the TCP/IP protocol suite for the LINUX
+ * operating system. INET is implemented using the BSD Socket
+ * interface as the means of communication with the user level.
+ *
+ * Definitions for the AF_INET socket handler.
+ *
+ * Version: @(#)sock.h 1.0.4 05/13/93
+ *
+ * Authors: Ross Biro, <bir7@leland.Stanford.Edu>
+ * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ * Corey Minyard <wf-rch!minyard@relay.EU.net>
+ * Florian La Roche <flla@stud.uni-sb.de>
+ *
+ * Fixes:
+ * Alan Cox : Volatiles in skbuff pointers. See
+ * skbuff comments. May be overdone,
+ * better to prove they can be removed
+ * than the reverse.
+ * Alan Cox : Added a zapped field for tcp to note
+ * a socket is reset and must stay shut up
+ * Alan Cox : New fields for options
+ * Pauline Middelink : identd support
+ * Alan Cox : Eliminate low level recv/recvfrom
+ * David S. Miller : New socket lookup architecture.
+ * Steve Whitehouse: Default routines for sock_ops
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#ifndef _SOCK_H
+#define _SOCK_H
+
+#include <linux/config.h>
+#include <linux/timer.h>
+#include <linux/cache.h>
+#include <linux/in.h> /* struct sockaddr_in */
+
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+#include <linux/in6.h> /* struct sockaddr_in6 */
+#include <linux/ipv6.h> /* dest_cache, inet6_options */
+#include <linux/icmpv6.h>
+#include <net/if_inet6.h> /* struct ipv6_mc_socklist */
+#endif
+
+#if defined(CONFIG_INET) || defined (CONFIG_INET_MODULE)
+#include <linux/icmp.h>
+#endif
+#include <linux/tcp.h> /* struct tcphdr */
+#if defined(CONFIG_IP_SCTP) || defined (CONFIG_IP_SCTP_MODULE)
+#include <net/sctp/structs.h> /* struct sctp_opt */
+#endif
+
+#include <linux/netdevice.h>
+#include <linux/skbuff.h> /* struct sk_buff */
+#include <net/protocol.h> /* struct inet_protocol */
+#if defined(CONFIG_X25) || defined(CONFIG_X25_MODULE)
+#include <net/x25.h>
+#endif
+#if defined(CONFIG_WAN_ROUTER) || defined(CONFIG_WAN_ROUTER_MODULE)
+#include <linux/if_wanpipe.h>
+#endif
+
+#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
+#include <net/ax25.h>
+#if defined(CONFIG_NETROM) || defined(CONFIG_NETROM_MODULE)
+#include <net/netrom.h>
+#endif
+#if defined(CONFIG_ROSE) || defined(CONFIG_ROSE_MODULE)
+#include <net/rose.h>
+#endif
+#endif
+
+#if defined(CONFIG_PPPOE) || defined(CONFIG_PPPOE_MODULE)
+#include <linux/if_pppox.h>
+#include <linux/ppp_channel.h> /* struct ppp_channel */
+#endif
+
+#if defined(CONFIG_IPX) || defined(CONFIG_IPX_MODULE)
+#if defined(CONFIG_SPX) || defined(CONFIG_SPX_MODULE)
+#include <net/spx.h>
+#else
+#include <net/ipx.h>
+#endif /* CONFIG_SPX */
+#endif /* CONFIG_IPX */
+
+#if defined(CONFIG_ATALK) || defined(CONFIG_ATALK_MODULE)
+#include <linux/atalk.h>
+#endif
+
+#if defined(CONFIG_DECNET) || defined(CONFIG_DECNET_MODULE)
+#include <net/dn.h>
+#endif
+
+#if defined(CONFIG_IRDA) || defined(CONFIG_IRDA_MODULE)
+#include <net/irda/irda.h>
+#endif
+
+#if defined(CONFIG_ATM) || defined(CONFIG_ATM_MODULE)
+struct atm_vcc;
+#endif
+
+#ifdef CONFIG_FILTER
+#include <linux/filter.h>
+#endif
+
+#include <asm/atomic.h>
+#include <net/dst.h>
+
+
+/* The AF_UNIX specific socket options */
+struct unix_opt {
+ struct unix_address *addr;
+ struct dentry * dentry;
+ struct vfsmount * mnt;
+ struct semaphore readsem;
+ struct sock * other;
+ struct sock ** list;
+ struct sock * gc_tree;
+ atomic_t inflight;
+ rwlock_t lock;
+ wait_queue_head_t peer_wait;
+};
+
+
+/* Once the IPX ncpd patches are in these are going into protinfo. */
+#if defined(CONFIG_IPX) || defined(CONFIG_IPX_MODULE)
+struct ipx_opt {
+ ipx_address dest_addr;
+ ipx_interface *intrfc;
+ unsigned short port;
+#ifdef CONFIG_IPX_INTERN
+ unsigned char node[IPX_NODE_LEN];
+#endif
+ unsigned short type;
+/*
+ * To handle special ncp connection-handling sockets for mars_nwe,
+ * the connection number must be stored in the socket.
+ */
+ unsigned short ipx_ncp_conn;
+};
+#endif
+
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+struct ipv6_pinfo {
+ struct in6_addr saddr;
+ struct in6_addr rcv_saddr;
+ struct in6_addr daddr;
+ struct in6_addr *daddr_cache;
+
+ __u32 flow_label;
+ __u32 frag_size;
+ int hop_limit;
+ int mcast_hops;
+ int mcast_oif;
+
+ /* pktoption flags */
+ union {
+ struct {
+ __u8 srcrt:2,
+ rxinfo:1,
+ rxhlim:1,
+ hopopts:1,
+ dstopts:1,
+ authhdr:1,
+ rxflow:1;
+ } bits;
+ __u8 all;
+ } rxopt;
+
+ /* sockopt flags */
+ __u8 mc_loop:1,
+ recverr:1,
+ sndflow:1,
+ pmtudisc:2,
+ ipv6only:1;
+
+ struct ipv6_mc_socklist *ipv6_mc_list;
+ struct ipv6_ac_socklist *ipv6_ac_list;
+ struct ipv6_fl_socklist *ipv6_fl_list;
+ __u32 dst_cookie;
+
+ struct ipv6_txoptions *opt;
+ struct sk_buff *pktoptions;
+};
+
+struct raw6_opt {
+ __u32 checksum; /* perform checksum */
+ __u32 offset; /* checksum offset */
+
+ struct icmp6_filter filter;
+};
+
+#define __ipv6_only_sock(sk) ((sk)->net_pinfo.af_inet6.ipv6only)
+#define ipv6_only_sock(sk) ((sk)->family == PF_INET6 && \
+ (sk)->net_pinfo.af_inet6.ipv6only)
+#else
+#define __ipv6_only_sock(sk) 0
+#define ipv6_only_sock(sk) 0
+#endif /* IPV6 */
+
+#if defined(CONFIG_INET) || defined(CONFIG_INET_MODULE)
+struct raw_opt {
+ struct icmp_filter filter;
+};
+#endif
+
+#if defined(CONFIG_INET) || defined (CONFIG_INET_MODULE)
+struct inet_opt
+{
+ int ttl; /* TTL setting */
+ int tos; /* TOS */
+ unsigned cmsg_flags;
+ struct ip_options *opt;
+ unsigned char hdrincl; /* Include headers ? */
+ __u8 mc_ttl; /* Multicasting TTL */
+ __u8 mc_loop; /* Loopback */
+ unsigned recverr : 1,
+ freebind : 1;
+ __u16 id; /* ID counter for DF pkts */
+ __u8 pmtudisc;
+ int mc_index; /* Multicast device index */
+ __u32 mc_addr;
+ struct ip_mc_socklist *mc_list; /* Group array */
+};
+#endif
+
+#if defined(CONFIG_PPPOE) || defined (CONFIG_PPPOE_MODULE)
+struct pppoe_opt
+{
+ struct net_device *dev; /* device associated with socket*/
+ struct pppoe_addr pa; /* what this socket is bound to*/
+ struct sockaddr_pppox relay; /* what socket data will be
+ relayed to (PPPoE relaying) */
+};
+
+struct pppox_opt
+{
+ struct ppp_channel chan;
+ struct sock *sk;
+ struct pppox_opt *next; /* for hash table */
+ union {
+ struct pppoe_opt pppoe;
+ } proto;
+};
+#define pppoe_dev proto.pppoe.dev
+#define pppoe_pa proto.pppoe.pa
+#define pppoe_relay proto.pppoe.relay
+#endif
+
+/* This defines a selective acknowledgement block. */
+struct tcp_sack_block {
+ __u32 start_seq;
+ __u32 end_seq;
+};
+
+enum tcp_congestion_algo {
+ TCP_RENO=0,
+ TCP_VEGAS,
+ TCP_WESTWOOD,
+ TCP_BIC,
+};
+
+struct tcp_opt {
+ int tcp_header_len; /* Bytes of tcp header to send */
+
+/*
+ * Header prediction flags
+ * 0x5?10 << 16 + snd_wnd in net byte order
+ */
+ __u32 pred_flags;
+
+/*
+ * RFC793 variables by their proper names. This means you can
+ * read the code and the spec side by side (and laugh ...)
+ * See RFC793 and RFC1122. The RFC writes these in capitals.
+ */
+ __u32 rcv_nxt; /* What we want to receive next */
+ __u32 snd_nxt; /* Next sequence we send */
+
+ __u32 snd_una; /* First byte we want an ack for */
+ __u32 snd_sml; /* Last byte of the most recently transmitted small packet */
+ __u32 rcv_tstamp; /* timestamp of last received ACK (for keepalives) */
+ __u32 lsndtime; /* timestamp of last sent data packet (for restart window) */
+
+ /* Delayed ACK control data */
+ struct {
+ __u8 pending; /* ACK is pending */
+ __u8 quick; /* Scheduled number of quick acks */
+ __u8 pingpong; /* The session is interactive */
+ __u8 blocked; /* Delayed ACK was blocked by socket lock*/
+ __u32 ato; /* Predicted tick of soft clock */
+ unsigned long timeout; /* Currently scheduled timeout */
+ __u32 lrcvtime; /* timestamp of last received data packet*/
+ __u16 last_seg_size; /* Size of last incoming segment */
+ __u16 rcv_mss; /* MSS used for delayed ACK decisions */
+ } ack;
+
+ /* Data for direct copy to user */
+ struct {
+ struct sk_buff_head prequeue;
+ struct task_struct *task;
+ struct iovec *iov;
+ int memory;
+ int len;
+ } ucopy;
+
+ __u32 snd_wl1; /* Sequence for window update */
+ __u32 snd_wnd; /* The window we expect to receive */
+ __u32 max_window; /* Maximal window ever seen from peer */
+ __u32 pmtu_cookie; /* Last pmtu seen by socket */
+ __u16 mss_cache; /* Cached effective mss, not including SACKS */
+ __u16 mss_clamp; /* Maximal mss, negotiated at connection setup */
+ __u16 ext_header_len; /* Network protocol overhead (IP/IPv6 options) */
+ __u8 ca_state; /* State of fast-retransmit machine */
+ __u8 retransmits; /* Number of unrecovered RTO timeouts. */
+
+ __u8 reordering; /* Packet reordering metric. */
+ __u8 queue_shrunk; /* Write queue has been shrunk recently.*/
+ __u8 defer_accept; /* User waits for some data after accept() */
+
+/* RTT measurement */
+ __u8 backoff; /* backoff */
+ __u32 srtt; /* smothed round trip time << 3 */
+ __u32 mdev; /* medium deviation */
+ __u32 mdev_max; /* maximal mdev for the last rtt period */
+ __u32 rttvar; /* smoothed mdev_max */
+ __u32 rtt_seq; /* sequence number to update rttvar */
+ __u32 rto; /* retransmit timeout */
+
+ __u32 packets_out; /* Packets which are "in flight" */
+ __u32 left_out; /* Packets which leaved network */
+ __u32 retrans_out; /* Retransmitted packets out */
+
+
+/*
+ * Slow start and congestion control (see also Nagle, and Karn & Partridge)
+ */
+ __u32 snd_ssthresh; /* Slow start size threshold */
+ __u32 snd_cwnd; /* Sending congestion window */
+ __u16 snd_cwnd_cnt; /* Linear increase counter */
+ __u16 snd_cwnd_clamp; /* Do not allow snd_cwnd to grow above this */
+ __u32 snd_cwnd_used;
+ __u32 snd_cwnd_stamp;
+
+ /* Two commonly used timers in both sender and receiver paths. */
+ unsigned long timeout;
+ struct timer_list retransmit_timer; /* Resend (no ack) */
+ struct timer_list delack_timer; /* Ack delay */
+
+ struct sk_buff_head out_of_order_queue; /* Out of order segments go here */
+
+ struct tcp_func *af_specific; /* Operations which are AF_INET{4,6} specific */
+ struct sk_buff *send_head; /* Front of stuff to transmit */
+ struct page *sndmsg_page; /* Cached page for sendmsg */
+ u32 sndmsg_off; /* Cached offset for sendmsg */
+
+ __u32 rcv_wnd; /* Current receiver window */
+ __u32 rcv_wup; /* rcv_nxt on last window update sent */
+ __u32 write_seq; /* Tail(+1) of data held in tcp send buffer */
+ __u32 pushed_seq; /* Last pushed seq, required to talk to windows */
+ __u32 copied_seq; /* Head of yet unread data */
+/*
+ * Options received (usually on last packet, some only on SYN packets).
+ */
+ char tstamp_ok, /* TIMESTAMP seen on SYN packet */
+ wscale_ok, /* Wscale seen on SYN packet */
+ sack_ok; /* SACK seen on SYN packet */
+ char saw_tstamp; /* Saw TIMESTAMP on last packet */
+ __u8 snd_wscale; /* Window scaling received from sender */
+ __u8 rcv_wscale; /* Window scaling to send to receiver */
+ __u8 nonagle; /* Disable Nagle algorithm? */
+ __u8 keepalive_probes; /* num of allowed keep alive probes */
+
+/* PAWS/RTTM data */
+ __u32 rcv_tsval; /* Time stamp value */
+ __u32 rcv_tsecr; /* Time stamp echo reply */
+ __u32 ts_recent; /* Time stamp to echo next */
+ long ts_recent_stamp;/* Time we stored ts_recent (for aging) */
+
+/* SACKs data */
+ __u16 user_mss; /* mss requested by user in ioctl */
+ __u8 dsack; /* D-SACK is scheduled */
+ __u8 eff_sacks; /* Size of SACK array to send with next packet */
+ struct tcp_sack_block duplicate_sack[1]; /* D-SACK block */
+ struct tcp_sack_block selective_acks[4]; /* The SACKS themselves*/
+
+ __u32 window_clamp; /* Maximal window to advertise */
+ __u32 rcv_ssthresh; /* Current window clamp */
+ __u8 probes_out; /* unanswered 0 window probes */
+ __u8 num_sacks; /* Number of SACK blocks */
+ __u16 advmss; /* Advertised MSS */
+
+ __u8 syn_retries; /* num of allowed syn retries */
+ __u8 ecn_flags; /* ECN status bits. */
+ __u16 prior_ssthresh; /* ssthresh saved at recovery start */
+ __u32 lost_out; /* Lost packets */
+ __u32 sacked_out; /* SACK'd packets */
+ __u32 fackets_out; /* FACK'd packets */
+ __u32 high_seq; /* snd_nxt at onset of congestion */
+
+ __u32 retrans_stamp; /* Timestamp of the last retransmit,
+ * also used in SYN-SENT to remember stamp of
+ * the first SYN. */
+ __u32 undo_marker; /* tracking retrans started here. */
+ int undo_retrans; /* number of undoable retransmissions. */
+ __u32 urg_seq; /* Seq of received urgent pointer */
+ __u16 urg_data; /* Saved octet of OOB data and control flags */
+ __u8 pending; /* Scheduled timer event */
+ __u8 urg_mode; /* In urgent mode */
+ __u32 snd_up; /* Urgent pointer */
+
+ /* The syn_wait_lock is necessary only to avoid tcp_get_info having
+ * to grab the main lock sock while browsing the listening hash
+ * (otherwise it's deadlock prone).
+ * This lock is acquired in read mode only from tcp_get_info() and
+ * it's acquired in write mode _only_ from code that is actively
+ * changing the syn_wait_queue. All readers that are holding
+ * the master sock lock don't need to grab this lock in read mode
+ * too as the syn_wait_queue writes are always protected from
+ * the main sock lock.
+ */
+ rwlock_t syn_wait_lock;
+ struct tcp_listen_opt *listen_opt;
+
+ /* FIFO of established children */
+ struct open_request *accept_queue;
+ struct open_request *accept_queue_tail;
+
+ int write_pending; /* A write to socket waits to start. */
+
+ unsigned int keepalive_time; /* time before keep alive takes place */
+ unsigned int keepalive_intvl; /* time interval between keep alive probes */
+ int linger2;
+
+ __u8 adv_cong; /* Using Vegas, Westwood, or BIC */
+ __u8 frto_counter; /* Number of new acks after RTO */
+ __u32 frto_highmark; /* snd_nxt when RTO occurred */
+
+ unsigned long last_synq_overflow;
+
+/* Receiver side RTT estimation */
+ struct {
+ __u32 rtt;
+ __u32 seq;
+ __u32 time;
+ } rcv_rtt_est;
+
+/* Receiver queue space */
+ struct {
+ int space;
+ __u32 seq;
+ __u32 time;
+ } rcvq_space;
+
+/* TCP Westwood structure */
+ struct {
+ __u32 bw_ns_est; /* first bandwidth estimation..not too smoothed 8) */
+ __u32 bw_est; /* bandwidth estimate */
+ __u32 rtt_win_sx; /* here starts a new evaluation... */
+ __u32 bk;
+ __u32 snd_una; /* used for evaluating the number of acked bytes */
+ __u32 cumul_ack;
+ __u32 accounted;
+ __u32 rtt;
+ __u32 rtt_min; /* minimum observed RTT */
+ } westwood;
+
+/* Vegas variables */
+ struct {
+ __u32 beg_snd_nxt; /* right edge during last RTT */
+ __u32 beg_snd_una; /* left edge during last RTT */
+ __u32 beg_snd_cwnd; /* saves the size of the cwnd */
+ __u8 doing_vegas_now;/* if true, do vegas for this RTT */
+ __u16 cntRTT; /* # of RTTs measured within last RTT */
+ __u32 minRTT; /* min of RTTs measured within last RTT (in usec) */
+ __u32 baseRTT; /* the min of all Vegas RTT measurements seen (in usec) */
+ } vegas;
+
+ /* BI TCP Parameters */
+ struct {
+ __u32 cnt; /* increase cwnd by 1 after this number of ACKs */
+ __u32 last_max_cwnd; /* last maximium snd_cwnd */
+ __u32 last_cwnd; /* the last snd_cwnd */
+ __u32 last_stamp; /* time when updated last_cwnd */
+ } bictcp;
+};
+
+
+/*
+ * This structure really needs to be cleaned up.
+ * Most of it is for TCP, and not used by any of
+ * the other protocols.
+ */
+
+/*
+ * The idea is to start moving to a newer struct gradualy
+ *
+ * IMHO the newer struct should have the following format:
+ *
+ * struct sock {
+ * sockmem [mem, proto, callbacks]
+ *
+ * union or struct {
+ * ax25;
+ * } ll_pinfo;
+ *
+ * union {
+ * ipv4;
+ * ipv6;
+ * ipx;
+ * netrom;
+ * rose;
+ * x25;
+ * } net_pinfo;
+ *
+ * union {
+ * tcp;
+ * udp;
+ * spx;
+ * netrom;
+ * } tp_pinfo;
+ *
+ * }
+ *
+ * The idea failed because IPv6 transition asssumes dual IP/IPv6 sockets.
+ * So, net_pinfo is IPv6 are really, and protinfo unifies all another
+ * private areas.
+ */
+
+/* Define this to get the sk->debug debugging facility. */
+#define SOCK_DEBUGGING
+#ifdef SOCK_DEBUGGING
+#define SOCK_DEBUG(sk, msg...) do { if((sk) && ((sk)->debug)) printk(KERN_DEBUG msg); } while (0)
+#else
+#define SOCK_DEBUG(sk, msg...) do { } while (0)
+#endif
+
+/* This is the per-socket lock. The spinlock provides a synchronization
+ * between user contexts and software interrupt processing, whereas the
+ * mini-semaphore synchronizes multiple users amongst themselves.
+ */
+typedef struct {
+ spinlock_t slock;
+ unsigned int users;
+ wait_queue_head_t wq;
+} socket_lock_t;
+
+#define sock_lock_init(__sk) \
+do { spin_lock_init(&((__sk)->lock.slock)); \
+ (__sk)->lock.users = 0; \
+ init_waitqueue_head(&((__sk)->lock.wq)); \
+} while(0)
+
+struct sock {
+ /* Socket demultiplex comparisons on incoming packets. */
+ __u32 daddr; /* Foreign IPv4 addr */
+ __u32 rcv_saddr; /* Bound local IPv4 addr */
+ __u16 dport; /* Destination port */
+ unsigned short num; /* Local port */
+ int bound_dev_if; /* Bound device index if != 0 */
+
+ /* Main hash linkage for various protocol lookup tables. */
+ struct sock *next;
+ struct sock **pprev;
+ struct sock *bind_next;
+ struct sock **bind_pprev;
+
+ volatile unsigned char state, /* Connection state */
+ zapped; /* In ax25 & ipx means not linked */
+ __u16 sport; /* Source port */
+
+ unsigned short family; /* Address family */
+ unsigned char reuse; /* SO_REUSEADDR setting */
+ unsigned char shutdown;
+ atomic_t refcnt; /* Reference count */
+
+ socket_lock_t lock; /* Synchronizer... */
+ int rcvbuf; /* Size of receive buffer in bytes */
+
+ wait_queue_head_t *sleep; /* Sock wait queue */
+ struct dst_entry *dst_cache; /* Destination cache */
+ rwlock_t dst_lock;
+ atomic_t rmem_alloc; /* Receive queue bytes committed */
+ struct sk_buff_head receive_queue; /* Incoming packets */
+ atomic_t wmem_alloc; /* Transmit queue bytes committed */
+ struct sk_buff_head write_queue; /* Packet sending queue */
+ atomic_t omem_alloc; /* "o" is "option" or "other" */
+ int wmem_queued; /* Persistent queue size */
+ int forward_alloc; /* Space allocated forward. */
+ __u32 saddr; /* Sending source */
+ unsigned int allocation; /* Allocation mode */
+ int sndbuf; /* Size of send buffer in bytes */
+ struct sock *prev;
+
+ /* Not all are volatile, but some are, so we might as well say they all are.
+ * XXX Make this a flag word -DaveM
+ */
+ volatile char dead,
+ done,
+ urginline,
+ keepopen,
+ linger,
+ destroy,
+ no_check,
+ broadcast,
+ bsdism;
+ unsigned char debug;
+ unsigned char rcvtstamp;
+ unsigned char use_write_queue;
+ unsigned char userlocks;
+ /* Hole of 3 bytes. Try to pack. */
+ int route_caps;
+ int proc;
+ unsigned long lingertime;
+
+ int hashent;
+ struct sock *pair;
+
+ /* The backlog queue is special, it is always used with
+ * the per-socket spinlock held and requires low latency
+ * access. Therefore we special case it's implementation.
+ */
+ struct {
+ struct sk_buff *head;
+ struct sk_buff *tail;
+ } backlog;
+
+ rwlock_t callback_lock;
+
+ /* Error queue, rarely used. */
+ struct sk_buff_head error_queue;
+
+ struct proto *prot;
+
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+ union {
+ struct ipv6_pinfo af_inet6;
+ } net_pinfo;
+#endif
+
+ union {
+ struct tcp_opt af_tcp;
+#if defined(CONFIG_IP_SCTP) || defined (CONFIG_IP_SCTP_MODULE)
+ struct sctp_opt af_sctp;
+#endif
+#if defined(CONFIG_INET) || defined (CONFIG_INET_MODULE)
+ struct raw_opt tp_raw4;
+#endif
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+ struct raw6_opt tp_raw;
+#endif /* CONFIG_IPV6 */
+#if defined(CONFIG_SPX) || defined (CONFIG_SPX_MODULE)
+ struct spx_opt af_spx;
+#endif /* CONFIG_SPX */
+
+ } tp_pinfo;
+
+ int err, err_soft; /* Soft holds errors that don't
+ cause failure but are the cause
+ of a persistent failure not just
+ 'timed out' */
+ unsigned short ack_backlog;
+ unsigned short max_ack_backlog;
+ __u32 priority;
+ unsigned short type;
+ unsigned char localroute; /* Route locally only */
+ unsigned char protocol;
+ struct ucred peercred;
+ int rcvlowat;
+ long rcvtimeo;
+ long sndtimeo;
+
+#ifdef CONFIG_FILTER
+ /* Socket Filtering Instructions */
+ struct sk_filter *filter;
+#endif /* CONFIG_FILTER */
+
+ /* This is where all the private (optional) areas that don't
+ * overlap will eventually live.
+ */
+ union {
+ void *destruct_hook;
+ struct unix_opt af_unix;
+#if defined(CONFIG_INET) || defined (CONFIG_INET_MODULE)
+ struct inet_opt af_inet;
+#endif
+#if defined(CONFIG_ATALK) || defined(CONFIG_ATALK_MODULE)
+ struct atalk_sock af_at;
+#endif
+#if defined(CONFIG_IPX) || defined(CONFIG_IPX_MODULE)
+ struct ipx_opt af_ipx;
+#endif
+#if defined (CONFIG_DECNET) || defined(CONFIG_DECNET_MODULE)
+ struct dn_scp dn;
+#endif
+#if defined (CONFIG_PACKET) || defined(CONFIG_PACKET_MODULE)
+ struct packet_opt *af_packet;
+#endif
+#if defined(CONFIG_X25) || defined(CONFIG_X25_MODULE)
+ x25_cb *x25;
+#endif
+#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
+ ax25_cb *ax25;
+#endif
+#if defined(CONFIG_NETROM) || defined(CONFIG_NETROM_MODULE)
+ nr_cb *nr;
+#endif
+#if defined(CONFIG_ROSE) || defined(CONFIG_ROSE_MODULE)
+ rose_cb *rose;
+#endif
+#if defined(CONFIG_PPPOE) || defined(CONFIG_PPPOE_MODULE)
+ struct pppox_opt *pppox;
+#endif
+ struct netlink_opt *af_netlink;
+#if defined(CONFIG_ECONET) || defined(CONFIG_ECONET_MODULE)
+ struct econet_opt *af_econet;
+#endif
+#if defined(CONFIG_ATM) || defined(CONFIG_ATM_MODULE)
+ struct atm_vcc *af_atm;
+#endif
+#if defined(CONFIG_IRDA) || defined(CONFIG_IRDA_MODULE)
+ struct irda_sock *irda;
+#endif
+#if defined(CONFIG_WAN_ROUTER) || defined(CONFIG_WAN_ROUTER_MODULE)
+ struct wanpipe_opt *af_wanpipe;
+#endif
+ } protinfo;
+
+
+ /* This part is used for the timeout functions. */
+ struct timer_list timer; /* This is the sock cleanup timer. */
+ struct timeval stamp;
+
+ /* Identd and reporting IO signals */
+ struct socket *socket;
+
+ /* RPC layer private data */
+ void *user_data;
+
+ /* Callbacks */
+ void (*state_change)(struct sock *sk);
+ void (*data_ready)(struct sock *sk,int bytes);
+ void (*write_space)(struct sock *sk);
+ void (*error_report)(struct sock *sk);
+
+ int (*backlog_rcv) (struct sock *sk,
+ struct sk_buff *skb);
+ void (*destruct)(struct sock *sk);
+};
+
+/* The per-socket spinlock must be held here. */
+#define sk_add_backlog(__sk, __skb) \
+do { if((__sk)->backlog.tail == NULL) { \
+ (__sk)->backlog.head = \
+ (__sk)->backlog.tail = (__skb); \
+ } else { \
+ ((__sk)->backlog.tail)->next = (__skb); \
+ (__sk)->backlog.tail = (__skb); \
+ } \
+ (__skb)->next = NULL; \
+} while(0)
+
+/* IP protocol blocks we attach to sockets.
+ * socket layer -> transport layer interface
+ * transport -> network interface is defined by struct inet_proto
+ */
+struct proto {
+ void (*close)(struct sock *sk,
+ long timeout);
+ int (*connect)(struct sock *sk,
+ struct sockaddr *uaddr,
+ int addr_len);
+ int (*disconnect)(struct sock *sk, int flags);
+
+ struct sock * (*accept) (struct sock *sk, int flags, int *err);
+
+ int (*ioctl)(struct sock *sk, int cmd,
+ unsigned long arg);
+ int (*init)(struct sock *sk);
+ int (*destroy)(struct sock *sk);
+ void (*shutdown)(struct sock *sk, int how);
+ int (*setsockopt)(struct sock *sk, int level,
+ int optname, char *optval, int optlen);
+ int (*getsockopt)(struct sock *sk, int level,
+ int optname, char *optval,
+ int *option);
+ int (*sendmsg)(struct sock *sk, struct msghdr *msg,
+ int len);
+ int (*recvmsg)(struct sock *sk, struct msghdr *msg,
+ int len, int noblock, int flags,
+ int *addr_len);
+ int (*bind)(struct sock *sk,
+ struct sockaddr *uaddr, int addr_len);
+
+ int (*backlog_rcv) (struct sock *sk,
+ struct sk_buff *skb);
+
+ /* Keeping track of sk's, looking them up, and port selection methods. */
+ void (*hash)(struct sock *sk);
+ void (*unhash)(struct sock *sk);
+ int (*get_port)(struct sock *sk, unsigned short snum);
+
+ char name[32];
+
+ struct {
+ int inuse;
+ u8 __pad[SMP_CACHE_BYTES - sizeof(int)];
+ } stats[NR_CPUS];
+};
+
+/* Called with local bh disabled */
+static __inline__ void sock_prot_inc_use(struct proto *prot)
+{
+ prot->stats[smp_processor_id()].inuse++;
+}
+
+static __inline__ void sock_prot_dec_use(struct proto *prot)
+{
+ prot->stats[smp_processor_id()].inuse--;
+}
+
+/* About 10 seconds */
+#define SOCK_DESTROY_TIME (10*HZ)
+
+/* Sockets 0-1023 can't be bound to unless you are superuser */
+#define PROT_SOCK 1024
+
+#define SHUTDOWN_MASK 3
+#define RCV_SHUTDOWN 1
+#define SEND_SHUTDOWN 2
+
+#define SOCK_SNDBUF_LOCK 1
+#define SOCK_RCVBUF_LOCK 2
+#define SOCK_BINDADDR_LOCK 4
+#define SOCK_BINDPORT_LOCK 8
+
+
+/* Used by processes to "lock" a socket state, so that
+ * interrupts and bottom half handlers won't change it
+ * from under us. It essentially blocks any incoming
+ * packets, so that we won't get any new data or any
+ * packets that change the state of the socket.
+ *
+ * While locked, BH processing will add new packets to
+ * the backlog queue. This queue is processed by the
+ * owner of the socket lock right before it is released.
+ *
+ * Since ~2.3.5 it is also exclusive sleep lock serializing
+ * accesses from user process context.
+ */
+extern void __lock_sock(struct sock *sk);
+extern void __release_sock(struct sock *sk);
+#define lock_sock(__sk) \
+do { spin_lock_bh(&((__sk)->lock.slock)); \
+ if ((__sk)->lock.users != 0) \
+ __lock_sock(__sk); \
+ (__sk)->lock.users = 1; \
+ spin_unlock_bh(&((__sk)->lock.slock)); \
+} while(0)
+
+#define release_sock(__sk) \
+do { spin_lock_bh(&((__sk)->lock.slock)); \
+ if ((__sk)->backlog.tail != NULL) \
+ __release_sock(__sk); \
+ (__sk)->lock.users = 0; \
+ if (waitqueue_active(&((__sk)->lock.wq))) wake_up(&((__sk)->lock.wq)); \
+ spin_unlock_bh(&((__sk)->lock.slock)); \
+} while(0)
+
+/* BH context may only use the following locking interface. */
+#define bh_lock_sock(__sk) spin_lock(&((__sk)->lock.slock))
+#define bh_unlock_sock(__sk) spin_unlock(&((__sk)->lock.slock))
+
+extern struct sock * sk_alloc(int family, int priority, int zero_it);
+extern void sk_free(struct sock *sk);
+
+extern struct sk_buff *sock_wmalloc(struct sock *sk,
+ unsigned long size, int force,
+ int priority);
+extern struct sk_buff *sock_rmalloc(struct sock *sk,
+ unsigned long size, int force,
+ int priority);
+extern void sock_wfree(struct sk_buff *skb);
+extern void sock_rfree(struct sk_buff *skb);
+
+extern int sock_setsockopt(struct socket *sock, int level,
+ int op, char *optval,
+ int optlen);
+
+extern int sock_getsockopt(struct socket *sock, int level,
+ int op, char *optval,
+ int *optlen);
+extern struct sk_buff *sock_alloc_send_skb(struct sock *sk,
+ unsigned long size,
+ int noblock,
+ int *errcode);
+extern struct sk_buff *sock_alloc_send_pskb(struct sock *sk,
+ unsigned long header_len,
+ unsigned long data_len,
+ int noblock,
+ int *errcode);
+extern void *sock_kmalloc(struct sock *sk, int size, int priority);
+extern void sock_kfree_s(struct sock *sk, void *mem, int size);
+
+/*
+ * Functions to fill in entries in struct proto_ops when a protocol
+ * does not implement a particular function.
+ */
+extern int sock_no_release(struct socket *);
+extern int sock_no_bind(struct socket *,
+ struct sockaddr *, int);
+extern int sock_no_connect(struct socket *,
+ struct sockaddr *, int, int);
+extern int sock_no_socketpair(struct socket *,
+ struct socket *);
+extern int sock_no_accept(struct socket *,
+ struct socket *, int);
+extern int sock_no_getname(struct socket *,
+ struct sockaddr *, int *, int);
+extern unsigned int sock_no_poll(struct file *, struct socket *,
+ struct poll_table_struct *);
+extern int sock_no_ioctl(struct socket *, unsigned int,
+ unsigned long);
+extern int sock_no_listen(struct socket *, int);
+extern int sock_no_shutdown(struct socket *, int);
+extern int sock_no_getsockopt(struct socket *, int , int,
+ char *, int *);
+extern int sock_no_setsockopt(struct socket *, int, int,
+ char *, int);
+extern int sock_no_fcntl(struct socket *,
+ unsigned int, unsigned long);
+extern int sock_no_sendmsg(struct socket *,
+ struct msghdr *, int,
+ struct scm_cookie *);
+extern int sock_no_recvmsg(struct socket *,
+ struct msghdr *, int, int,
+ struct scm_cookie *);
+extern int sock_no_mmap(struct file *file,
+ struct socket *sock,
+ struct vm_area_struct *vma);
+extern ssize_t sock_no_sendpage(struct socket *sock,
+ struct page *page,
+ int offset, size_t size,
+ int flags);
+
+/*
+ * Default socket callbacks and setup code
+ */
+
+extern void sock_def_destruct(struct sock *);
+
+/* Initialise core socket variables */
+extern void sock_init_data(struct socket *sock, struct sock *sk);
+
+extern void sklist_remove_socket(struct sock **list, struct sock *sk);
+extern void sklist_insert_socket(struct sock **list, struct sock *sk);
+extern void sklist_destroy_socket(struct sock **list, struct sock *sk);
+
+#ifdef CONFIG_FILTER
+
+/**
+ * sk_filter - run a packet through a socket filter
+ * @sk: sock associated with &sk_buff
+ * @skb: buffer to filter
+ * @needlock: set to 1 if the sock is not locked by caller.
+ *
+ * Run the filter code and then cut skb->data to correct size returned by
+ * sk_run_filter. If pkt_len is 0 we toss packet. If skb->len is smaller
+ * than pkt_len we keep whole skb->data. This is the socket level
+ * wrapper to sk_run_filter. It returns 0 if the packet should
+ * be accepted or -EPERM if the packet should be tossed.
+ */
+
+static inline int sk_filter(struct sock *sk, struct sk_buff *skb, int needlock)
+{
+ int err = 0;
+
+ if (sk->filter) {
+ struct sk_filter *filter;
+
+ if (needlock)
+ bh_lock_sock(sk);
+
+ filter = sk->filter;
+ if (filter) {
+ int pkt_len = sk_run_filter(skb, filter->insns,
+ filter->len);
+ if (!pkt_len)
+ err = -EPERM;
+ else
+ skb_trim(skb, pkt_len);
+ }
+
+ if (needlock)
+ bh_unlock_sock(sk);
+ }
+ return err;
+}
+
+/**
+ * sk_filter_release: Release a socket filter
+ * @sk: socket
+ * @fp: filter to remove
+ *
+ * Remove a filter from a socket and release its resources.
+ */
+
+static inline void sk_filter_release(struct sock *sk, struct sk_filter *fp)
+{
+ unsigned int size = sk_filter_len(fp);
+
+ atomic_sub(size, &sk->omem_alloc);
+
+ if (atomic_dec_and_test(&fp->refcnt))
+ kfree(fp);
+}
+
+static inline void sk_filter_charge(struct sock *sk, struct sk_filter *fp)
+{
+ atomic_inc(&fp->refcnt);
+ atomic_add(sk_filter_len(fp), &sk->omem_alloc);
+}
+
+#else
+
+static inline int sk_filter(struct sock *sk, struct sk_buff *skb, int needlock)
+{
+ return 0;
+}
+
+#endif /* CONFIG_FILTER */
+
+/*
+ * Socket reference counting postulates.
+ *
+ * * Each user of socket SHOULD hold a reference count.
+ * * Each access point to socket (an hash table bucket, reference from a list,
+ * running timer, skb in flight MUST hold a reference count.
+ * * When reference count hits 0, it means it will never increase back.
+ * * When reference count hits 0, it means that no references from
+ * outside exist to this socket and current process on current CPU
+ * is last user and may/should destroy this socket.
+ * * sk_free is called from any context: process, BH, IRQ. When
+ * it is called, socket has no references from outside -> sk_free
+ * may release descendant resources allocated by the socket, but
+ * to the time when it is called, socket is NOT referenced by any
+ * hash tables, lists etc.
+ * * Packets, delivered from outside (from network or from another process)
+ * and enqueued on receive/error queues SHOULD NOT grab reference count,
+ * when they sit in queue. Otherwise, packets will leak to hole, when
+ * socket is looked up by one cpu and unhasing is made by another CPU.
+ * It is true for udp/raw, netlink (leak to receive and error queues), tcp
+ * (leak to backlog). Packet socket does all the processing inside
+ * BR_NETPROTO_LOCK, so that it has not this race condition. UNIX sockets
+ * use separate SMP lock, so that they are prone too.
+ */
+
+/* Grab socket reference count. This operation is valid only
+ when sk is ALREADY grabbed f.e. it is found in hash table
+ or a list and the lookup is made under lock preventing hash table
+ modifications.
+ */
+
+static inline void sock_hold(struct sock *sk)
+{
+ atomic_inc(&sk->refcnt);
+}
+
+/* Ungrab socket in the context, which assumes that socket refcnt
+ cannot hit zero, f.e. it is true in context of any socketcall.
+ */
+static inline void __sock_put(struct sock *sk)
+{
+ atomic_dec(&sk->refcnt);
+}
+
+/* Ungrab socket and destroy it, if it was the last reference. */
+static inline void sock_put(struct sock *sk)
+{
+ if (atomic_dec_and_test(&sk->refcnt))
+ sk_free(sk);
+}
+
+/* Detach socket from process context.
+ * Announce socket dead, detach it from wait queue and inode.
+ * Note that parent inode held reference count on this struct sock,
+ * we do not release it in this function, because protocol
+ * probably wants some additional cleanups or even continuing
+ * to work with this socket (TCP).
+ */
+static inline void sock_orphan(struct sock *sk)
+{
+ write_lock_bh(&sk->callback_lock);
+ sk->dead = 1;
+ sk->socket = NULL;
+ sk->sleep = NULL;
+ write_unlock_bh(&sk->callback_lock);
+}
+
+static inline void sock_graft(struct sock *sk, struct socket *parent)
+{
+ write_lock_bh(&sk->callback_lock);
+ sk->sleep = &parent->wait;
+ parent->sk = sk;
+ sk->socket = parent;
+ write_unlock_bh(&sk->callback_lock);
+}
+
+static inline int sock_i_uid(struct sock *sk)
+{
+ int uid;
+
+ read_lock(&sk->callback_lock);
+ uid = sk->socket ? sk->socket->inode->i_uid : 0;
+ read_unlock(&sk->callback_lock);
+ return uid;
+}
+
+static inline unsigned long sock_i_ino(struct sock *sk)
+{
+ unsigned long ino;
+
+ read_lock(&sk->callback_lock);
+ ino = sk->socket ? sk->socket->inode->i_ino : 0;
+ read_unlock(&sk->callback_lock);
+ return ino;
+}
+
+static inline struct dst_entry *
+__sk_dst_get(struct sock *sk)
+{
+ return sk->dst_cache;
+}
+
+static inline struct dst_entry *
+sk_dst_get(struct sock *sk)
+{
+ struct dst_entry *dst;
+
+ read_lock(&sk->dst_lock);
+ dst = sk->dst_cache;
+ if (dst)
+ dst_hold(dst);
+ read_unlock(&sk->dst_lock);
+ return dst;
+}
+
+static inline void
+__sk_dst_set(struct sock *sk, struct dst_entry *dst)
+{
+ struct dst_entry *old_dst;
+
+ old_dst = sk->dst_cache;
+ sk->dst_cache = dst;
+ dst_release(old_dst);
+}
+
+static inline void
+sk_dst_set(struct sock *sk, struct dst_entry *dst)
+{
+ write_lock(&sk->dst_lock);
+ __sk_dst_set(sk, dst);
+ write_unlock(&sk->dst_lock);
+}
+
+static inline void
+__sk_dst_reset(struct sock *sk)
+{
+ struct dst_entry *old_dst;
+
+ old_dst = sk->dst_cache;
+ sk->dst_cache = NULL;
+ dst_release(old_dst);
+}
+
+static inline void
+sk_dst_reset(struct sock *sk)
+{
+ write_lock(&sk->dst_lock);
+ __sk_dst_reset(sk);
+ write_unlock(&sk->dst_lock);
+}
+
+static inline struct dst_entry *
+__sk_dst_check(struct sock *sk, u32 cookie)
+{
+ struct dst_entry *dst = sk->dst_cache;
+
+ if (dst && dst->obsolete && dst->ops->check(dst, cookie) == NULL) {
+ sk->dst_cache = NULL;
+ return NULL;
+ }
+
+ return dst;
+}
+
+static inline struct dst_entry *
+sk_dst_check(struct sock *sk, u32 cookie)
+{
+ struct dst_entry *dst = sk_dst_get(sk);
+
+ if (dst && dst->obsolete && dst->ops->check(dst, cookie) == NULL) {
+ sk_dst_reset(sk);
+ return NULL;
+ }
+
+ return dst;
+}
+
+
+/*
+ * Queue a received datagram if it will fit. Stream and sequenced
+ * protocols can't normally use this as they need to fit buffers in
+ * and play with them.
+ *
+ * Inlined as it's very short and called for pretty much every
+ * packet ever received.
+ */
+
+static inline void skb_set_owner_w(struct sk_buff *skb, struct sock *sk)
+{
+ sock_hold(sk);
+ skb->sk = sk;
+ skb->destructor = sock_wfree;
+ atomic_add(skb->truesize, &sk->wmem_alloc);
+}
+
+static inline void skb_set_owner_r(struct sk_buff *skb, struct sock *sk)
+{
+ skb->sk = sk;
+ skb->destructor = sock_rfree;
+ atomic_add(skb->truesize, &sk->rmem_alloc);
+}
+
+static inline int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
+{
+ int err = 0;
+ int skb_len;
+
+ /* Cast skb->rcvbuf to unsigned... It's pointless, but reduces
+ number of warnings when compiling with -W --ANK
+ */
+ if (atomic_read(&sk->rmem_alloc) + skb->truesize >= (unsigned)sk->rcvbuf) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ /* It would be deadlock, if sock_queue_rcv_skb is used
+ with socket lock! We assume that users of this
+ function are lock free.
+ */
+ err = sk_filter(sk, skb, 1);
+ if (err)
+ goto out;
+
+ skb->dev = NULL;
+ skb_set_owner_r(skb, sk);
+
+ /* Cache the SKB length before we tack it onto the receive
+ * queue. Once it is added it no longer belongs to us and
+ * may be freed by other threads of control pulling packets
+ * from the queue.
+ */
+ skb_len = skb->len;
+
+ skb_queue_tail(&sk->receive_queue, skb);
+ if (!sk->dead)
+ sk->data_ready(sk,skb_len);
+out:
+ return err;
+}
+
+static inline int sock_queue_err_skb(struct sock *sk, struct sk_buff *skb)
+{
+ /* Cast skb->rcvbuf to unsigned... It's pointless, but reduces
+ number of warnings when compiling with -W --ANK
+ */
+ if (atomic_read(&sk->rmem_alloc) + skb->truesize >= (unsigned)sk->rcvbuf)
+ return -ENOMEM;
+ skb_set_owner_r(skb, sk);
+ skb_queue_tail(&sk->error_queue,skb);
+ if (!sk->dead)
+ sk->data_ready(sk,skb->len);
+ return 0;
+}
+
+/*
+ * Recover an error report and clear atomically
+ */
+
+static inline int sock_error(struct sock *sk)
+{
+ int err=xchg(&sk->err,0);
+ return -err;
+}
+
+static inline unsigned long sock_wspace(struct sock *sk)
+{
+ int amt = 0;
+
+ if (!(sk->shutdown & SEND_SHUTDOWN)) {
+ amt = sk->sndbuf - atomic_read(&sk->wmem_alloc);
+ if (amt < 0)
+ amt = 0;
+ }
+ return amt;
+}
+
+static inline void sk_wake_async(struct sock *sk, int how, int band)
+{
+ if (sk->socket && sk->socket->fasync_list)
+ sock_wake_async(sk->socket, how, band);
+}
+
+#define SOCK_MIN_SNDBUF 2048
+#define SOCK_MIN_RCVBUF 256
+
+/*
+ * Default write policy as shown to user space via poll/select/SIGIO
+ */
+static inline int sock_writeable(struct sock *sk)
+{
+ return atomic_read(&sk->wmem_alloc) < (sk->sndbuf / 2);
+}
+
+static inline int gfp_any(void)
+{
+ return in_softirq() ? GFP_ATOMIC : GFP_KERNEL;
+}
+
+static inline long sock_rcvtimeo(struct sock *sk, int noblock)
+{
+ return noblock ? 0 : sk->rcvtimeo;
+}
+
+static inline long sock_sndtimeo(struct sock *sk, int noblock)
+{
+ return noblock ? 0 : sk->sndtimeo;
+}
+
+static inline int sock_rcvlowat(struct sock *sk, int waitall, int len)
+{
+ return (waitall ? len : min_t(int, sk->rcvlowat, len)) ? : 1;
+}
+
+/* Alas, with timeout socket operations are not restartable.
+ * Compare this to poll().
+ */
+static inline int sock_intr_errno(long timeo)
+{
+ return timeo == MAX_SCHEDULE_TIMEOUT ? -ERESTARTSYS : -EINTR;
+}
+
+static __inline__ void
+sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb)
+{
+ if (sk->rcvtstamp)
+ put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP, sizeof(skb->stamp), &skb->stamp);
+ else
+ sk->stamp = skb->stamp;
+}
+
+/*
+ * Enable debug/info messages
+ */
+
+#if 0
+#define NETDEBUG(x) do { } while (0)
+#else
+#define NETDEBUG(x) do { x; } while (0)
+#endif
+
+/*
+ * Macros for sleeping on a socket. Use them like this:
+ *
+ * SOCK_SLEEP_PRE(sk)
+ * if (condition)
+ * schedule();
+ * SOCK_SLEEP_POST(sk)
+ *
+ */
+
+#define SOCK_SLEEP_PRE(sk) { struct task_struct *tsk = current; \
+ DECLARE_WAITQUEUE(wait, tsk); \
+ tsk->state = TASK_INTERRUPTIBLE; \
+ add_wait_queue((sk)->sleep, &wait); \
+ release_sock(sk);
+
+#define SOCK_SLEEP_POST(sk) tsk->state = TASK_RUNNING; \
+ remove_wait_queue((sk)->sleep, &wait); \
+ lock_sock(sk); \
+ }
+
+extern __u32 sysctl_wmem_max;
+extern __u32 sysctl_rmem_max;
+
+#endif /* _SOCK_H */
diff --unified --recursive --new-file linux-2.4.30/net/Config.in linux-2.4.30-1-686-smp-ring3/net/Config.in
--- linux-2.4.30/net/Config.in 2005-01-19 15:10:13.000000000 +0100
+++ linux-2.4.30-1-686-smp-ring3/net/Config.in 2005-10-22 23:08:28.028051250 +0200
@@ -15,6 +15,9 @@
bool ' Network packet filtering debugging' CONFIG_NETFILTER_DEBUG
fi
bool 'Socket Filtering' CONFIG_FILTER
+if [ "$CONFIG_EXPERIMENTAL" = "y" -a "$CONFIG_FILTER" = "y" ]; then
+ source net/ring/Config.in
+fi
tristate 'Unix domain sockets' CONFIG_UNIX
bool 'TCP/IP networking' CONFIG_INET
if [ "$CONFIG_INET" = "y" ]; then
diff --unified --recursive --new-file linux-2.4.30/net/Config.in.ORG linux-2.4.30-1-686-smp-ring3/net/Config.in.ORG
--- linux-2.4.30/net/Config.in.ORG 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.4.30-1-686-smp-ring3/net/Config.in.ORG 2005-10-22 23:08:28.020050750 +0200
@@ -0,0 +1,107 @@
+#
+# Network configuration
+#
+mainmenu_option next_comment
+comment 'Networking options'
+tristate 'Packet socket' CONFIG_PACKET
+if [ "$CONFIG_PACKET" != "n" ]; then
+ bool ' Packet socket: mmapped IO' CONFIG_PACKET_MMAP
+fi
+
+tristate 'Netlink device emulation' CONFIG_NETLINK_DEV
+
+bool 'Network packet filtering (replaces ipchains)' CONFIG_NETFILTER
+if [ "$CONFIG_NETFILTER" = "y" ]; then
+ bool ' Network packet filtering debugging' CONFIG_NETFILTER_DEBUG
+fi
+bool 'Socket Filtering' CONFIG_FILTER
+tristate 'Unix domain sockets' CONFIG_UNIX
+bool 'TCP/IP networking' CONFIG_INET
+if [ "$CONFIG_INET" = "y" ]; then
+ source net/ipv4/Config.in
+ if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+# IPv6 as module will cause a CRASH if you try to unload it
+ tristate ' The IPv6 protocol (EXPERIMENTAL)' CONFIG_IPV6
+ if [ "$CONFIG_IPV6" != "n" ]; then
+ source net/ipv6/Config.in
+ fi
+ fi
+ if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ source net/khttpd/Config.in
+ fi
+ if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ source net/sctp/Config.in
+ fi
+fi
+if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ tristate 'Asynchronous Transfer Mode (ATM) (EXPERIMENTAL)' CONFIG_ATM
+ if [ "$CONFIG_ATM" = "y" -o "$CONFIG_ATM" = "m" ]; then
+ if [ "$CONFIG_INET" = "y" ]; then
+ dep_tristate ' Classical IP over ATM' CONFIG_ATM_CLIP $CONFIG_ATM
+ if [ "$CONFIG_ATM_CLIP" != "n" ]; then
+ bool ' Do NOT send ICMP if no neighbour' CONFIG_ATM_CLIP_NO_ICMP
+ fi
+ fi
+ dep_tristate ' LAN Emulation (LANE) support' CONFIG_ATM_LANE $CONFIG_ATM
+ if [ "$CONFIG_INET" = "y" -a "$CONFIG_ATM_LANE" != "n" ]; then
+ tristate ' Multi-Protocol Over ATM (MPOA) support' CONFIG_ATM_MPOA
+ fi
+ dep_tristate ' RFC1483/2684 Bridged protocols' CONFIG_ATM_BR2684 $CONFIG_ATM
+ if [ "$CONFIG_ATM_BR2684" != "n" ]; then
+ bool ' Per-VC IP filter kludge' CONFIG_ATM_BR2684_IPFILTER
+ fi
+ fi
+fi
+tristate '802.1Q VLAN Support' CONFIG_VLAN_8021Q
+
+comment ' '
+tristate 'The IPX protocol' CONFIG_IPX
+if [ "$CONFIG_IPX" != "n" ]; then
+ source net/ipx/Config.in
+fi
+
+tristate 'Appletalk protocol support' CONFIG_ATALK
+if [ "$CONFIG_ATALK" != "n" ]; then
+ source drivers/net/appletalk/Config.in
+fi
+
+tristate 'DECnet Support' CONFIG_DECNET
+if [ "$CONFIG_DECNET" != "n" ]; then
+ source net/decnet/Config.in
+fi
+dep_tristate '802.1d Ethernet Bridging' CONFIG_BRIDGE $CONFIG_INET
+if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ tristate 'CCITT X.25 Packet Layer (EXPERIMENTAL)' CONFIG_X25
+ tristate 'LAPB Data Link Driver (EXPERIMENTAL)' CONFIG_LAPB
+ bool '802.2 LLC (EXPERIMENTAL)' CONFIG_LLC
+ bool 'Frame Diverter (EXPERIMENTAL)' CONFIG_NET_DIVERT
+# if [ "$CONFIG_LLC" = "y" ]; then
+# bool ' Netbeui (EXPERIMENTAL)' CONFIG_NETBEUI
+# fi
+ if [ "$CONFIG_INET" = "y" ]; then
+ tristate 'Acorn Econet/AUN protocols (EXPERIMENTAL)' CONFIG_ECONET
+ if [ "$CONFIG_ECONET" != "n" ]; then
+ bool ' AUN over UDP' CONFIG_ECONET_AUNUDP
+ bool ' Native Econet' CONFIG_ECONET_NATIVE
+ fi
+ fi
+ tristate 'WAN router' CONFIG_WAN_ROUTER
+ bool 'Fast switching (read help!)' CONFIG_NET_FASTROUTE
+ bool 'Forwarding between high speed interfaces' CONFIG_NET_HW_FLOWCONTROL
+fi
+
+mainmenu_option next_comment
+comment 'QoS and/or fair queueing'
+bool 'QoS and/or fair queueing' CONFIG_NET_SCHED
+if [ "$CONFIG_NET_SCHED" = "y" ]; then
+ source net/sched/Config.in
+fi
+#bool 'Network code profiler' CONFIG_NET_PROFILE
+endmenu
+
+mainmenu_option next_comment
+comment 'Network testing'
+dep_tristate 'Packet Generator (USE WITH CAUTION)' CONFIG_NET_PKTGEN $CONFIG_PROC_FS
+endmenu
+
+endmenu
diff --unified --recursive --new-file linux-2.4.30/net/Makefile linux-2.4.30-1-686-smp-ring3/net/Makefile
--- linux-2.4.30/net/Makefile 2004-08-08 01:26:06.000000000 +0200
+++ linux-2.4.30-1-686-smp-ring3/net/Makefile 2005-10-22 23:08:27.928045000 +0200
@@ -7,7 +7,7 @@
O_TARGET := network.o
-mod-subdirs := ipv4/netfilter ipv6/netfilter ipx irda bluetooth atm netlink sched core sctp 802
+mod-subdirs := ipv4/netfilter ipv6/netfilter ipx irda bluetooth atm netlink sched core sctp 802 ring
export-objs := netsyms.o
subdir-y := core ethernet
@@ -46,6 +46,7 @@
subdir-$(CONFIG_DECNET) += decnet
subdir-$(CONFIG_ECONET) += econet
subdir-$(CONFIG_VLAN_8021Q) += 8021q
+subdir-$(CONFIG_RING) += ring
ifeq ($(CONFIG_NETFILTER),y)
mod-subdirs += ipv4/ipvs
diff --unified --recursive --new-file linux-2.4.30/net/Makefile.ORG linux-2.4.30-1-686-smp-ring3/net/Makefile.ORG
--- linux-2.4.30/net/Makefile.ORG 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.4.30-1-686-smp-ring3/net/Makefile.ORG 2005-10-22 23:08:27.916044250 +0200
@@ -0,0 +1,61 @@
+#
+# Makefile for the linux networking.
+#
+# 2 Sep 2000, Christoph Hellwig <hch@infradead.org>
+# Rewritten to use lists instead of if-statements.
+#
+
+O_TARGET := network.o
+
+mod-subdirs := ipv4/netfilter ipv6/netfilter ipx irda bluetooth atm netlink sched core sctp 802
+export-objs := netsyms.o
+
+subdir-y := core ethernet
+subdir-m := ipv4 # hum?
+
+
+subdir-$(CONFIG_NET) += 802 sched netlink
+subdir-$(CONFIG_IPV6) += ipv6
+subdir-$(CONFIG_INET) += ipv4
+subdir-$(CONFIG_NETFILTER) += ipv4/netfilter
+subdir-$(CONFIG_UNIX) += unix
+subdir-$(CONFIG_IP_SCTP) += sctp
+
+ifneq ($(CONFIG_IPV6),n)
+ifneq ($(CONFIG_IPV6),)
+subdir-$(CONFIG_NETFILTER) += ipv6/netfilter
+endif
+endif
+
+subdir-$(CONFIG_KHTTPD) += khttpd
+subdir-$(CONFIG_PACKET) += packet
+subdir-$(CONFIG_NET_SCHED) += sched
+subdir-$(CONFIG_BRIDGE) += bridge
+subdir-$(CONFIG_IPX) += ipx
+subdir-$(CONFIG_ATALK) += appletalk
+subdir-$(CONFIG_WAN_ROUTER) += wanrouter
+subdir-$(CONFIG_X25) += x25
+subdir-$(CONFIG_LAPB) += lapb
+subdir-$(CONFIG_NETROM) += netrom
+subdir-$(CONFIG_ROSE) += rose
+subdir-$(CONFIG_AX25) += ax25
+subdir-$(CONFIG_IRDA) += irda
+subdir-$(CONFIG_BLUEZ) += bluetooth
+subdir-$(CONFIG_SUNRPC) += sunrpc
+subdir-$(CONFIG_ATM) += atm
+subdir-$(CONFIG_DECNET) += decnet
+subdir-$(CONFIG_ECONET) += econet
+subdir-$(CONFIG_VLAN_8021Q) += 8021q
+
+ifeq ($(CONFIG_NETFILTER),y)
+ mod-subdirs += ipv4/ipvs
+ subdir-$(CONFIG_IP_VS) += ipv4/ipvs
+endif
+
+obj-y := socket.o $(join $(subdir-y), $(patsubst %,/%.o,$(notdir $(subdir-y))))
+ifeq ($(CONFIG_NET),y)
+obj-$(CONFIG_MODULES) += netsyms.o
+obj-$(CONFIG_SYSCTL) += sysctl_net.o
+endif
+
+include $(TOPDIR)/Rules.make
diff --unified --recursive --new-file linux-2.4.30/net/core/dev.c linux-2.4.30-1-686-smp-ring3/net/core/dev.c
--- linux-2.4.30/net/core/dev.c 2005-04-04 03:42:20.000000000 +0200
+++ linux-2.4.30-1-686-smp-ring3/net/core/dev.c 2005-10-22 23:08:27.900043250 +0200
@@ -104,6 +104,56 @@
#include <linux/wireless.h> /* Note : will define WIRELESS_EXT */
#include <net/iw_handler.h>
#endif /* CONFIG_NET_RADIO || CONFIG_NET_PCMCIA_RADIO */
+#if defined (CONFIG_RING) || defined(CONFIG_RING_MODULE)
+
+/* #define RING_DEBUG */
+
+#include <linux/ring.h>
+#include <linux/version.h>
+
+static handle_ring_skb ring_handler = NULL;
+
+handle_ring_skb get_skb_ring_handler() { return(ring_handler); }
+
+void set_skb_ring_handler(handle_ring_skb the_handler) {
+ ring_handler = the_handler;
+}
+
+void do_skb_ring_handler(struct sk_buff *skb,
+ u_char recv_packet, u_char real_skb) {
+ if(ring_handler)
+ ring_handler(skb, recv_packet, real_skb);
+}
+
+/* ******************* */
+
+static handle_ring_buffer buffer_ring_handler = NULL;
+
+handle_ring_buffer get_buffer_ring_handler() { return(buffer_ring_handler); }
+
+void set_buffer_ring_handler(handle_ring_buffer the_handler) {
+ buffer_ring_handler = the_handler;
+}
+
+int do_buffer_ring_handler(struct net_device *dev, char *data, int len) {
+ if(buffer_ring_handler) {
+ buffer_ring_handler(dev, data, len);
+ return(1);
+ } else
+ return(0);
+}
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
+EXPORT_SYMBOL(get_skb_ring_handler);
+EXPORT_SYMBOL(set_skb_ring_handler);
+EXPORT_SYMBOL(do_skb_ring_handler);
+
+EXPORT_SYMBOL(get_buffer_ring_handler);
+EXPORT_SYMBOL(set_buffer_ring_handler);
+EXPORT_SYMBOL(do_buffer_ring_handler);
+#endif
+
+#endif
#ifdef CONFIG_PLIP
extern int plip_init(void);
#endif
@@ -1066,6 +1116,10 @@
return -ENOMEM;
}
+#if defined (CONFIG_RING) || defined(CONFIG_RING_MODULE)
+ if(ring_handler) ring_handler(skb, 0, 1);
+#endif /* CONFIG_RING */
+
/* Grab device queue */
spin_lock_bh(&dev->queue_lock);
q = dev->qdisc;
@@ -1278,6 +1332,13 @@
struct softnet_data *queue;
unsigned long flags;
+#if defined (CONFIG_RING) || defined(CONFIG_RING_MODULE)
+ if(ring_handler && ring_handler(skb, 1, 1)) {
+ /* The packet has been copied into a ring */
+ return(NET_RX_SUCCESS);
+ }
+#endif /* CONFIG_RING */
+
if (skb->stamp.tv_sec == 0)
do_gettimeofday(&skb->stamp);
@@ -1464,6 +1525,13 @@
int ret = NET_RX_DROP;
unsigned short type;
+#if defined (CONFIG_RING) || defined(CONFIG_RING_MODULE)
+ if(ring_handler && ring_handler(skb, 1, 1)) {
+ /* The packet has been copied into a ring */
+ return(NET_RX_SUCCESS);
+ }
+#endif /* CONFIG_RING */
+
if (skb->stamp.tv_sec == 0)
do_gettimeofday(&skb->stamp);
diff --unified --recursive --new-file linux-2.4.30/net/core/dev.c.ORG linux-2.4.30-1-686-smp-ring3/net/core/dev.c.ORG
--- linux-2.4.30/net/core/dev.c.ORG 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.4.30-1-686-smp-ring3/net/core/dev.c.ORG 2005-10-22 23:08:27.472016500 +0200
@@ -0,0 +1,2926 @@
+/*
+ * NET3 Protocol independent device support routines.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Derived from the non IP parts of dev.c 1.0.19
+ * Authors: Ross Biro, <bir7@leland.Stanford.Edu>
+ * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ * Mark Evans, <evansmp@uhura.aston.ac.uk>
+ *
+ * Additional Authors:
+ * Florian la Roche <rzsfl@rz.uni-sb.de>
+ * Alan Cox <gw4pts@gw4pts.ampr.org>
+ * David Hinds <dahinds@users.sourceforge.net>
+ * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
+ * Adam Sulmicki <adam@cfar.umd.edu>
+ * Pekka Riikonen <priikone@poesidon.pspt.fi>
+ *
+ * Changes:
+ * D.J. Barrow : Fixed bug where dev->refcnt gets set to 2
+ * if register_netdev gets called before
+ * net_dev_init & also removed a few lines
+ * of code in the process.
+ * Alan Cox : device private ioctl copies fields back.
+ * Alan Cox : Transmit queue code does relevant stunts to
+ * keep the queue safe.
+ * Alan Cox : Fixed double lock.
+ * Alan Cox : Fixed promisc NULL pointer trap
+ * ???????? : Support the full private ioctl range
+ * Alan Cox : Moved ioctl permission check into drivers
+ * Tim Kordas : SIOCADDMULTI/SIOCDELMULTI
+ * Alan Cox : 100 backlog just doesn't cut it when
+ * you start doing multicast video 8)
+ * Alan Cox : Rewrote net_bh and list manager.
+ * Alan Cox : Fix ETH_P_ALL echoback lengths.
+ * Alan Cox : Took out transmit every packet pass
+ * Saved a few bytes in the ioctl handler
+ * Alan Cox : Network driver sets packet type before calling netif_rx. Saves
+ * a function call a packet.
+ * Alan Cox : Hashed net_bh()
+ * Richard Kooijman: Timestamp fixes.
+ * Alan Cox : Wrong field in SIOCGIFDSTADDR
+ * Alan Cox : Device lock protection.
+ * Alan Cox : Fixed nasty side effect of device close changes.
+ * Rudi Cilibrasi : Pass the right thing to set_mac_address()
+ * Dave Miller : 32bit quantity for the device lock to make it work out
+ * on a Sparc.
+ * Bjorn Ekwall : Added KERNELD hack.
+ * Alan Cox : Cleaned up the backlog initialise.
+ * Craig Metz : SIOCGIFCONF fix if space for under
+ * 1 device.
+ * Thomas Bogendoerfer : Return ENODEV for dev_open, if there
+ * is no device open function.
+ * Andi Kleen : Fix error reporting for SIOCGIFCONF
+ * Michael Chastain : Fix signed/unsigned for SIOCGIFCONF
+ * Cyrus Durgin : Cleaned for KMOD
+ * Adam Sulmicki : Bug Fix : Network Device Unload
+ * A network device unload needs to purge
+ * the backlog queue.
+ * Paul Rusty Russell : SIOCSIFNAME
+ * Pekka Riikonen : Netdev boot-time settings code
+ * Andrew Morton : Make unregister_netdevice wait indefinitely on dev->refcnt
+ * J Hadi Salim : - Backlog queue sampling
+ * - netif_rx() feedback
+ */
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/bitops.h>
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/if_ether.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/notifier.h>
+#include <linux/skbuff.h>
+#include <linux/brlock.h>
+#include <net/sock.h>
+#include <linux/rtnetlink.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/if_bridge.h>
+#include <linux/divert.h>
+#include <net/dst.h>
+#include <net/pkt_sched.h>
+#include <net/profile.h>
+#include <net/checksum.h>
+#include <linux/highmem.h>
+#include <linux/init.h>
+#include <linux/kmod.h>
+#include <linux/module.h>
+#if defined(CONFIG_NET_RADIO) || defined(CONFIG_NET_PCMCIA_RADIO)
+#include <linux/wireless.h> /* Note : will define WIRELESS_EXT */
+#include <net/iw_handler.h>
+#endif /* CONFIG_NET_RADIO || CONFIG_NET_PCMCIA_RADIO */
+#ifdef CONFIG_PLIP
+extern int plip_init(void);
+#endif
+
+
+/* This define, if set, will randomly drop a packet when congestion
+ * is more than moderate. It helps fairness in the multi-interface
+ * case when one of them is a hog, but it kills performance for the
+ * single interface case so it is off now by default.
+ */
+#undef RAND_LIE
+
+/* Setting this will sample the queue lengths and thus congestion
+ * via a timer instead of as each packet is received.
+ */
+#undef OFFLINE_SAMPLE
+
+NET_PROFILE_DEFINE(dev_queue_xmit)
+NET_PROFILE_DEFINE(softnet_process)
+
+const char *if_port_text[] = {
+ "unknown",
+ "BNC",
+ "10baseT",
+ "AUI",
+ "100baseT",
+ "100baseTX",
+ "100baseFX"
+};
+
+/*
+ * The list of packet types we will receive (as opposed to discard)
+ * and the routines to invoke.
+ *
+ * Why 16. Because with 16 the only overlap we get on a hash of the
+ * low nibble of the protocol value is RARP/SNAP/X.25.
+ *
+ * NOTE: That is no longer true with the addition of VLAN tags. Not
+ * sure which should go first, but I bet it won't make much
+ * difference if we are running VLANs. The good news is that
+ * this protocol won't be in the list unless compiled in, so
+ * the average user (w/out VLANs) will not be adversly affected.
+ * --BLG
+ *
+ * 0800 IP
+ * 8100 802.1Q VLAN
+ * 0001 802.3
+ * 0002 AX.25
+ * 0004 802.2
+ * 8035 RARP
+ * 0005 SNAP
+ * 0805 X.25
+ * 0806 ARP
+ * 8137 IPX
+ * 0009 Localtalk
+ * 86DD IPv6
+ */
+
+static struct packet_type *ptype_base[16]; /* 16 way hashed list */
+static struct packet_type *ptype_all = NULL; /* Taps */
+
+#ifdef OFFLINE_SAMPLE
+static void sample_queue(unsigned long dummy);
+static struct timer_list samp_timer = { function: sample_queue };
+#endif
+
+#ifdef CONFIG_HOTPLUG
+static int net_run_sbin_hotplug(struct net_device *dev, char *action);
+#else
+#define net_run_sbin_hotplug(dev, action) ({ 0; })
+#endif
+
+/*
+ * Our notifier list
+ */
+
+static struct notifier_block *netdev_chain=NULL;
+
+/*
+ * Device drivers call our routines to queue packets here. We empty the
+ * queue in the local softnet handler.
+ */
+struct softnet_data softnet_data[NR_CPUS] __cacheline_aligned;
+
+#ifdef CONFIG_NET_FASTROUTE
+int netdev_fastroute;
+int netdev_fastroute_obstacles;
+#endif
+
+
+/******************************************************************************************
+
+ Protocol management and registration routines
+
+*******************************************************************************************/
+
+/*
+ * For efficiency
+ */
+
+int netdev_nit=0;
+
+/*
+ * Add a protocol ID to the list. Now that the input handler is
+ * smarter we can dispense with all the messy stuff that used to be
+ * here.
+ *
+ * BEWARE!!! Protocol handlers, mangling input packets,
+ * MUST BE last in hash buckets and checking protocol handlers
+ * MUST start from promiscous ptype_all chain in net_bh.
+ * It is true now, do not change it.
+ * Explantion follows: if protocol handler, mangling packet, will
+ * be the first on list, it is not able to sense, that packet
+ * is cloned and should be copied-on-write, so that it will
+ * change it and subsequent readers will get broken packet.
+ * --ANK (980803)
+ */
+
+/**
+ * dev_add_pack - add packet handler
+ * @pt: packet type declaration
+ *
+ * Add a protocol handler to the networking stack. The passed &packet_type
+ * is linked into kernel lists and may not be freed until it has been
+ * removed from the kernel lists.
+ */
+
+void dev_add_pack(struct packet_type *pt)
+{
+ int hash;
+
+ br_write_lock_bh(BR_NETPROTO_LOCK);
+
+#ifdef CONFIG_NET_FASTROUTE
+ /* Hack to detect packet socket */
+ if ((pt->data) && ((int)(pt->data)!=1)) {
+ netdev_fastroute_obstacles++;
+ dev_clear_fastroute(pt->dev);
+ }
+#endif
+ if (pt->type == htons(ETH_P_ALL)) {
+ netdev_nit++;
+ pt->next=ptype_all;
+ ptype_all=pt;
+ } else {
+ hash=ntohs(pt->type)&15;
+ pt->next = ptype_base[hash];
+ ptype_base[hash] = pt;
+ }
+ br_write_unlock_bh(BR_NETPROTO_LOCK);
+}
+
+
+/**
+ * dev_remove_pack - remove packet handler
+ * @pt: packet type declaration
+ *
+ * Remove a protocol handler that was previously added to the kernel
+ * protocol handlers by dev_add_pack(). The passed &packet_type is removed
+ * from the kernel lists and can be freed or reused once this function
+ * returns.
+ */
+
+void dev_remove_pack(struct packet_type *pt)
+{
+ struct packet_type **pt1;
+
+ br_write_lock_bh(BR_NETPROTO_LOCK);
+
+ if (pt->type == htons(ETH_P_ALL)) {
+ netdev_nit--;
+ pt1=&ptype_all;
+ } else {
+ pt1=&ptype_base[ntohs(pt->type)&15];
+ }
+
+ for (; (*pt1) != NULL; pt1 = &((*pt1)->next)) {
+ if (pt == (*pt1)) {
+ *pt1 = pt->next;
+#ifdef CONFIG_NET_FASTROUTE
+ if (pt->data)
+ netdev_fastroute_obstacles--;
+#endif
+ br_write_unlock_bh(BR_NETPROTO_LOCK);
+ return;
+ }
+ }
+ br_write_unlock_bh(BR_NETPROTO_LOCK);
+ printk(KERN_WARNING "dev_remove_pack: %p not found.\n", pt);
+}
+
+/******************************************************************************
+
+ Device Boot-time Settings Routines
+
+*******************************************************************************/
+
+/* Boot time configuration table */
+static struct netdev_boot_setup dev_boot_setup[NETDEV_BOOT_SETUP_MAX];
+
+/**
+ * netdev_boot_setup_add - add new setup entry
+ * @name: name of the device
+ * @map: configured settings for the device
+ *
+ * Adds new setup entry to the dev_boot_setup list. The function
+ * returns 0 on error and 1 on success. This is a generic routine to
+ * all netdevices.
+ */
+int netdev_boot_setup_add(char *name, struct ifmap *map)
+{
+ struct netdev_boot_setup *s;
+ int i;
+
+ s = dev_boot_setup;
+ for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) {
+ if (s[i].name[0] == '\0' || s[i].name[0] == ' ') {
+ memset(s[i].name, 0, sizeof(s[i].name));
+ strcpy(s[i].name, name);
+ memcpy(&s[i].map, map, sizeof(s[i].map));
+ break;
+ }
+ }
+
+ if (i >= NETDEV_BOOT_SETUP_MAX)
+ return 0;
+
+ return 1;
+}
+
+/**
+ * netdev_boot_setup_check - check boot time settings
+ * @dev: the netdevice
+ *
+ * Check boot time settings for the device.
+ * The found settings are set for the device to be used
+ * later in the device probing.
+ * Returns 0 if no settings found, 1 if they are.
+ */
+int netdev_boot_setup_check(struct net_device *dev)
+{
+ struct netdev_boot_setup *s;
+ int i;
+
+ s = dev_boot_setup;
+ for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) {
+ if (s[i].name[0] != '\0' && s[i].name[0] != ' ' &&
+ !strncmp(dev->name, s[i].name, strlen(s[i].name))) {
+ dev->irq = s[i].map.irq;
+ dev->base_addr = s[i].map.base_addr;
+ dev->mem_start = s[i].map.mem_start;
+ dev->mem_end = s[i].map.mem_end;
+ return 1;
+ }
+ }
+ return 0;
+}
+
+/*
+ * Saves at boot time configured settings for any netdevice.
+ */
+int __init netdev_boot_setup(char *str)
+{
+ int ints[5];
+ struct ifmap map;
+
+ str = get_options(str, ARRAY_SIZE(ints), ints);
+ if (!str || !*str)
+ return 0;
+
+ /* Save settings */
+ memset(&map, 0, sizeof(map));
+ if (ints[0] > 0)
+ map.irq = ints[1];
+ if (ints[0] > 1)
+ map.base_addr = ints[2];
+ if (ints[0] > 2)
+ map.mem_start = ints[3];
+ if (ints[0] > 3)
+ map.mem_end = ints[4];
+
+ /* Add new entry to the list */
+ return netdev_boot_setup_add(str, &map);
+}
+
+__setup("netdev=", netdev_boot_setup);
+
+/*****************************************************************************************
+
+ Device Interface Subroutines
+
+******************************************************************************************/
+
+/**
+ * __dev_get_by_name - find a device by its name
+ * @name: name to find
+ *
+ * Find an interface by name. Must be called under RTNL semaphore
+ * or @dev_base_lock. If the name is found a pointer to the device
+ * is returned. If the name is not found then %NULL is returned. The
+ * reference counters are not incremented so the caller must be
+ * careful with locks.
+ */
+
+
+struct net_device *__dev_get_by_name(const char *name)
+{
+ struct net_device *dev;
+
+ for (dev = dev_base; dev != NULL; dev = dev->next) {
+ if (strncmp(dev->name, name, IFNAMSIZ) == 0)
+ return dev;
+ }
+ return NULL;
+}
+
+/**
+ * dev_get_by_name - find a device by its name
+ * @name: name to find
+ *
+ * Find an interface by name. This can be called from any
+ * context and does its own locking. The returned handle has
+ * the usage count incremented and the caller must use dev_put() to
+ * release it when it is no longer needed. %NULL is returned if no
+ * matching device is found.
+ */
+
+struct net_device *dev_get_by_name(const char *name)
+{
+ struct net_device *dev;
+
+ read_lock(&dev_base_lock);
+ dev = __dev_get_by_name(name);
+ if (dev)
+ dev_hold(dev);
+ read_unlock(&dev_base_lock);
+ return dev;
+}
+
+/*
+ Return value is changed to int to prevent illegal usage in future.
+ It is still legal to use to check for device existence.
+
+ User should understand, that the result returned by this function
+ is meaningless, if it was not issued under rtnl semaphore.
+ */
+
+/**
+ * dev_get - test if a device exists
+ * @name: name to test for
+ *
+ * Test if a name exists. Returns true if the name is found. In order
+ * to be sure the name is not allocated or removed during the test the
+ * caller must hold the rtnl semaphore.
+ *
+ * This function primarily exists for back compatibility with older
+ * drivers.
+ */
+
+int dev_get(const char *name)
+{
+ struct net_device *dev;
+
+ read_lock(&dev_base_lock);
+ dev = __dev_get_by_name(name);
+ read_unlock(&dev_base_lock);
+ return dev != NULL;
+}
+
+/**
+ * __dev_get_by_index - find a device by its ifindex
+ * @ifindex: index of device
+ *
+ * Search for an interface by index. Returns %NULL if the device
+ * is not found or a pointer to the device. The device has not
+ * had its reference counter increased so the caller must be careful
+ * about locking. The caller must hold either the RTNL semaphore
+ * or @dev_base_lock.
+ */
+
+struct net_device * __dev_get_by_index(int ifindex)
+{
+ struct net_device *dev;
+
+ for (dev = dev_base; dev != NULL; dev = dev->next) {
+ if (dev->ifindex == ifindex)
+ return dev;
+ }
+ return NULL;
+}
+
+
+/**
+ * dev_get_by_index - find a device by its ifindex
+ * @ifindex: index of device
+ *
+ * Search for an interface by index. Returns NULL if the device
+ * is not found or a pointer to the device. The device returned has
+ * had a reference added and the pointer is safe until the user calls
+ * dev_put to indicate they have finished with it.
+ */
+
+struct net_device * dev_get_by_index(int ifindex)
+{
+ struct net_device *dev;
+
+ read_lock(&dev_base_lock);
+ dev = __dev_get_by_index(ifindex);
+ if (dev)
+ dev_hold(dev);
+ read_unlock(&dev_base_lock);
+ return dev;
+}
+
+/**
+ * dev_getbyhwaddr - find a device by its hardware address
+ * @type: media type of device
+ * @ha: hardware address
+ *
+ * Search for an interface by MAC address. Returns NULL if the device
+ * is not found or a pointer to the device. The caller must hold the
+ * rtnl semaphore. The returned device has not had its ref count increased
+ * and the caller must therefore be careful about locking
+ *
+ * BUGS:
+ * If the API was consistent this would be __dev_get_by_hwaddr
+ */
+
+struct net_device *dev_getbyhwaddr(unsigned short type, char *ha)
+{
+ struct net_device *dev;
+
+ ASSERT_RTNL();
+
+ for (dev = dev_base; dev != NULL; dev = dev->next) {
+ if (dev->type == type &&
+ memcmp(dev->dev_addr, ha, dev->addr_len) == 0)
+ return dev;
+ }
+ return NULL;
+}
+
+/**
+ * dev_get_by_flags - find any device with given flags
+ * @if_flags: IFF_* values
+ * @mask: bitmask of bits in if_flags to check
+ *
+ * Search for any interface with the given flags. Returns NULL if a device
+ * is not found or a pointer to the device. The device returned has
+ * had a reference added and the pointer is safe until the user calls
+ * dev_put to indicate they have finished with it.
+ */
+
+struct net_device * dev_get_by_flags(unsigned short if_flags, unsigned short mask)
+{
+ struct net_device *dev;
+
+ read_lock(&dev_base_lock);
+ dev = __dev_get_by_flags(if_flags, mask);
+ if (dev)
+ dev_hold(dev);
+ read_unlock(&dev_base_lock);
+ return dev;
+}
+
+/**
+ * __dev_get_by_flags - find any device with given flags
+ * @if_flags: IFF_* values
+ * @mask: bitmask of bits in if_flags to check
+ *
+ * Search for any interface with the given flags. Returns NULL if a device
+ * is not found or a pointer to the device. The caller must hold either
+ * the RTNL semaphore or @dev_base_lock.
+ */
+
+struct net_device *__dev_get_by_flags(unsigned short if_flags, unsigned short mask)
+{
+ struct net_device *dev;
+
+ for (dev = dev_base; dev != NULL; dev = dev->next) {
+ if (((dev->flags ^ if_flags) & mask) == 0)
+ return dev;
+ }
+ return NULL;
+}
+
+/**
+ * dev_alloc_name - allocate a name for a device
+ * @dev: device
+ * @name: name format string
+ *
+ * Passed a format string - eg "lt%d" it will try and find a suitable
+ * id. Not efficient for many devices, not called a lot. The caller
+ * must hold the dev_base or rtnl lock while allocating the name and
+ * adding the device in order to avoid duplicates. Returns the number
+ * of the unit assigned or a negative errno code.
+ */
+
+int dev_alloc_name(struct net_device *dev, const char *name)
+{
+ int i;
+ char buf[32];
+ char *p;
+
+ /*
+ * Verify the string as this thing may have come from
+ * the user. There must be either one "%d" and no other "%"
+ * characters, or no "%" characters at all.
+ */
+ p = strchr(name, '%');
+ if (p && (p[1] != 'd' || strchr(p+2, '%')))
+ return -EINVAL;
+
+ /*
+ * If you need over 100 please also fix the algorithm...
+ */
+ for (i = 0; i < 100; i++) {
+ snprintf(buf,sizeof(buf),name,i);
+ if (__dev_get_by_name(buf) == NULL) {
+ strcpy(dev->name, buf);
+ return i;
+ }
+ }
+ return -ENFILE; /* Over 100 of the things .. bail out! */
+}
+
+/**
+ * dev_alloc - allocate a network device and name
+ * @name: name format string
+ * @err: error return pointer
+ *
+ * Passed a format string, eg. "lt%d", it will allocate a network device
+ * and space for the name. %NULL is returned if no memory is available.
+ * If the allocation succeeds then the name is assigned and the
+ * device pointer returned. %NULL is returned if the name allocation
+ * failed. The cause of an error is returned as a negative errno code
+ * in the variable @err points to.
+ *
+ * The caller must hold the @dev_base or RTNL locks when doing this in
+ * order to avoid duplicate name allocations.
+ */
+
+struct net_device *dev_alloc(const char *name, int *err)
+{
+ struct net_device *dev=kmalloc(sizeof(struct net_device), GFP_KERNEL);
+ if (dev == NULL) {
+ *err = -ENOBUFS;
+ return NULL;
+ }
+ memset(dev, 0, sizeof(struct net_device));
+ *err = dev_alloc_name(dev, name);
+ if (*err < 0) {
+ kfree(dev);
+ return NULL;
+ }
+ return dev;
+}
+
+/**
+ * netdev_state_change - device changes state
+ * @dev: device to cause notification
+ *
+ * Called to indicate a device has changed state. This function calls
+ * the notifier chains for netdev_chain and sends a NEWLINK message
+ * to the routing socket.
+ */
+
+void netdev_state_change(struct net_device *dev)
+{
+ if (dev->flags&IFF_UP) {
+ notifier_call_chain(&netdev_chain, NETDEV_CHANGE, dev);
+ rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
+ }
+}
+
+
+#ifdef CONFIG_KMOD
+
+/**
+ * dev_load - load a network module
+ * @name: name of interface
+ *
+ * If a network interface is not present and the process has suitable
+ * privileges this function loads the module. If module loading is not
+ * available in this kernel then it becomes a nop.
+ */
+
+void dev_load(const char *name)
+{
+ if (!dev_get(name) && capable(CAP_SYS_MODULE))
+ request_module(name);
+}
+
+#else
+
+extern inline void dev_load(const char *unused){;}
+
+#endif
+
+static int default_rebuild_header(struct sk_buff *skb)
+{
+ printk(KERN_DEBUG "%s: default_rebuild_header called -- BUG!\n", skb->dev ? skb->dev->name : "NULL!!!");
+ kfree_skb(skb);
+ return 1;
+}
+
+/**
+ * dev_open - prepare an interface for use.
+ * @dev: device to open
+ *
+ * Takes a device from down to up state. The device's private open
+ * function is invoked and then the multicast lists are loaded. Finally
+ * the device is moved into the up state and a %NETDEV_UP message is
+ * sent to the netdev notifier chain.
+ *
+ * Calling this function on an active interface is a nop. On a failure
+ * a negative errno code is returned.
+ */
+
+int dev_open(struct net_device *dev)
+{
+ int ret = 0;
+
+ /*
+ * Is it already up?
+ */
+
+ if (dev->flags&IFF_UP)
+ return 0;
+
+ /*
+ * Is it even present?
+ */
+ if (!netif_device_present(dev))
+ return -ENODEV;
+
+ /*
+ * Call device private open method
+ */
+ if (try_inc_mod_count(dev->owner)) {
+ set_bit(__LINK_STATE_START, &dev->state);
+ if (dev->open) {
+ ret = dev->open(dev);
+ if (ret != 0) {
+ clear_bit(__LINK_STATE_START, &dev->state);
+ if (dev->owner)
+ __MOD_DEC_USE_COUNT(dev->owner);
+ }
+ }
+ } else {
+ ret = -ENODEV;
+ }
+
+ /*
+ * If it went open OK then:
+ */
+
+ if (ret == 0)
+ {
+ /*
+ * Set the flags.
+ */
+ dev->flags |= IFF_UP;
+
+ /*
+ * Initialize multicasting status
+ */
+ dev_mc_upload(dev);
+
+ /*
+ * Wakeup transmit queue engine
+ */
+ dev_activate(dev);
+
+ /*
+ * ... and announce new interface.
+ */
+ notifier_call_chain(&netdev_chain, NETDEV_UP, dev);
+ }
+ return(ret);
+}
+
+#ifdef CONFIG_NET_FASTROUTE
+
+static void dev_do_clear_fastroute(struct net_device *dev)
+{
+ if (dev->accept_fastpath) {
+ int i;
+
+ for (i=0; i<=NETDEV_FASTROUTE_HMASK; i++) {
+ struct dst_entry *dst;
+
+ write_lock_irq(&dev->fastpath_lock);
+ dst = dev->fastpath[i];
+ dev->fastpath[i] = NULL;
+ write_unlock_irq(&dev->fastpath_lock);
+
+ dst_release(dst);
+ }
+ }
+}
+
+void dev_clear_fastroute(struct net_device *dev)
+{
+ if (dev) {
+ dev_do_clear_fastroute(dev);
+ } else {
+ read_lock(&dev_base_lock);
+ for (dev = dev_base; dev; dev = dev->next)
+ dev_do_clear_fastroute(dev);
+ read_unlock(&dev_base_lock);
+ }
+}
+#endif
+
+/**
+ * dev_close - shutdown an interface.
+ * @dev: device to shutdown
+ *
+ * This function moves an active device into down state. A
+ * %NETDEV_GOING_DOWN is sent to the netdev notifier chain. The device
+ * is then deactivated and finally a %NETDEV_DOWN is sent to the notifier
+ * chain.
+ */
+
+int dev_close(struct net_device *dev)
+{
+ if (!(dev->flags&IFF_UP))
+ return 0;
+
+ /*
+ * Tell people we are going down, so that they can
+ * prepare to death, when device is still operating.
+ */
+ notifier_call_chain(&netdev_chain, NETDEV_GOING_DOWN, dev);
+
+ dev_deactivate(dev);
+
+ clear_bit(__LINK_STATE_START, &dev->state);
+
+ /* Synchronize to scheduled poll. We cannot touch poll list,
+ * it can be even on different cpu. So just clear netif_running(),
+ * and wait when poll really will happen. Actually, the best place
+ * for this is inside dev->stop() after device stopped its irq
+ * engine, but this requires more changes in devices. */
+
+ smp_mb__after_clear_bit(); /* Commit netif_running(). */
+ while (test_bit(__LINK_STATE_RX_SCHED, &dev->state)) {
+ /* No hurry. */
+ current->state = TASK_INTERRUPTIBLE;
+ schedule_timeout(1);
+ }
+
+ /*
+ * Call the device specific close. This cannot fail.
+ * Only if device is UP
+ *
+ * We allow it to be called even after a DETACH hot-plug
+ * event.
+ */
+
+ if (dev->stop)
+ dev->stop(dev);
+
+ /*
+ * Device is now down.
+ */
+
+ dev->flags &= ~IFF_UP;
+#ifdef CONFIG_NET_FASTROUTE
+ dev_clear_fastroute(dev);
+#endif
+
+ /*
+ * Tell people we are down
+ */
+ notifier_call_chain(&netdev_chain, NETDEV_DOWN, dev);
+
+ /*
+ * Drop the module refcount
+ */
+ if (dev->owner)
+ __MOD_DEC_USE_COUNT(dev->owner);
+
+ return(0);
+}
+
+
+/*
+ * Device change register/unregister. These are not inline or static
+ * as we export them to the world.
+ */
+
+/**
+ * register_netdevice_notifier - register a network notifier block
+ * @nb: notifier
+ *
+ * Register a notifier to be called when network device events occur.
+ * The notifier passed is linked into the kernel structures and must
+ * not be reused until it has been unregistered. A negative errno code
+ * is returned on a failure.
+ */
+
+int register_netdevice_notifier(struct notifier_block *nb)
+{
+ return notifier_chain_register(&netdev_chain, nb);
+}
+
+/**
+ * unregister_netdevice_notifier - unregister a network notifier block
+ * @nb: notifier
+ *
+ * Unregister a notifier previously registered by
+ * register_netdevice_notifier(). The notifier is unlinked into the
+ * kernel structures and may then be reused. A negative errno code
+ * is returned on a failure.
+ */
+
+int unregister_netdevice_notifier(struct notifier_block *nb)
+{
+ return notifier_chain_unregister(&netdev_chain,nb);
+}
+
+/*
+ * Support routine. Sends outgoing frames to any network
+ * taps currently in use.
+ */
+
+void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct packet_type *ptype;
+ do_gettimeofday(&skb->stamp);
+
+ br_read_lock(BR_NETPROTO_LOCK);
+ for (ptype = ptype_all; ptype!=NULL; ptype = ptype->next)
+ {
+ /* Never send packets back to the socket
+ * they originated from - MvS (miquels@drinkel.ow.org)
+ */
+ if ((ptype->dev == dev || !ptype->dev) &&
+ ((struct sock *)ptype->data != skb->sk))
+ {
+ struct sk_buff *skb2;
+ if ((skb2 = skb_clone(skb, GFP_ATOMIC)) == NULL)
+ break;
+
+ /* skb->nh should be correctly
+ set by sender, so that the second statement is
+ just protection against buggy protocols.
+ */
+ skb2->mac.raw = skb2->data;
+
+ if (skb2->nh.raw < skb2->data || skb2->nh.raw > skb2->tail) {
+ if (net_ratelimit())
+ printk(KERN_CRIT "protocol %04x is buggy, dev %s\n", skb2->protocol, dev->name);
+ skb2->nh.raw = skb2->data;
+ }
+
+ skb2->h.raw = skb2->nh.raw;
+ skb2->pkt_type = PACKET_OUTGOING;
+ ptype->func(skb2, skb->dev, ptype);
+ }
+ }
+ br_read_unlock(BR_NETPROTO_LOCK);
+}
+
+/* Calculate csum in the case, when packet is misrouted.
+ * If it failed by some reason, ignore and send skb with wrong
+ * checksum.
+ */
+struct sk_buff * skb_checksum_help(struct sk_buff *skb)
+{
+ int offset;
+ unsigned int csum;
+
+ offset = skb->h.raw - skb->data;
+ if (offset > (int)skb->len)
+ BUG();
+ csum = skb_checksum(skb, offset, skb->len-offset, 0);
+
+ offset = skb->tail - skb->h.raw;
+ if (offset <= 0)
+ BUG();
+ if (skb->csum+2 > offset)
+ BUG();
+
+ *(u16*)(skb->h.raw + skb->csum) = csum_fold(csum);
+ skb->ip_summed = CHECKSUM_NONE;
+ return skb;
+}
+
+#ifdef CONFIG_HIGHMEM
+/* Actually, we should eliminate this check as soon as we know, that:
+ * 1. IOMMU is present and allows to map all the memory.
+ * 2. No high memory really exists on this machine.
+ */
+
+static inline int
+illegal_highdma(struct net_device *dev, struct sk_buff *skb)
+{
+ int i;
+
+ if (dev->features&NETIF_F_HIGHDMA)
+ return 0;
+
+ for (i=0; i<skb_shinfo(skb)->nr_frags; i++)
+ if (skb_shinfo(skb)->frags[i].page >= highmem_start_page)
+ return 1;
+
+ return 0;
+}
+#else
+#define illegal_highdma(dev, skb) (0)
+#endif
+
+/**
+ * dev_queue_xmit - transmit a buffer
+ * @skb: buffer to transmit
+ *
+ * Queue a buffer for transmission to a network device. The caller must
+ * have set the device and priority and built the buffer before calling this
+ * function. The function can be called from an interrupt.
+ *
+ * A negative errno code is returned on a failure. A success does not
+ * guarantee the frame will be transmitted as it may be dropped due
+ * to congestion or traffic shaping.
+ */
+
+int dev_queue_xmit(struct sk_buff *skb)
+{
+ struct net_device *dev = skb->dev;
+ struct Qdisc *q;
+
+ if (skb_shinfo(skb)->frag_list &&
+ !(dev->features&NETIF_F_FRAGLIST) &&
+ skb_linearize(skb, GFP_ATOMIC) != 0) {
+ kfree_skb(skb);
+ return -ENOMEM;
+ }
+
+ /* Fragmented skb is linearized if device does not support SG,
+ * or if at least one of fragments is in highmem and device
+ * does not support DMA from it.
+ */
+ if (skb_shinfo(skb)->nr_frags &&
+ (!(dev->features&NETIF_F_SG) || illegal_highdma(dev, skb)) &&
+ skb_linearize(skb, GFP_ATOMIC) != 0) {
+ kfree_skb(skb);
+ return -ENOMEM;
+ }
+
+ /* If packet is not checksummed and device does not support
+ * checksumming for this protocol, complete checksumming here.
+ */
+ if (skb->ip_summed == CHECKSUM_HW &&
+ (!(dev->features&(NETIF_F_HW_CSUM|NETIF_F_NO_CSUM)) &&
+ (!(dev->features&NETIF_F_IP_CSUM) ||
+ skb->protocol != htons(ETH_P_IP)))) {
+ if ((skb = skb_checksum_help(skb)) == NULL)
+ return -ENOMEM;
+ }
+
+ /* Grab device queue */
+ spin_lock_bh(&dev->queue_lock);
+ q = dev->qdisc;
+ if (q->enqueue) {
+ int ret = q->enqueue(skb, q);
+
+ qdisc_run(dev);
+
+ spin_unlock_bh(&dev->queue_lock);
+ return ret == NET_XMIT_BYPASS ? NET_XMIT_SUCCESS : ret;
+ }
+
+ /* The device has no queue. Common case for software devices:
+ loopback, all the sorts of tunnels...
+
+ Really, it is unlikely that xmit_lock protection is necessary here.
+ (f.e. loopback and IP tunnels are clean ignoring statistics counters.)
+ However, it is possible, that they rely on protection
+ made by us here.
+
+ Check this and shot the lock. It is not prone from deadlocks.
+ Either shot noqueue qdisc, it is even simpler 8)
+ */
+ if (dev->flags&IFF_UP) {
+ int cpu = smp_processor_id();
+
+ if (dev->xmit_lock_owner != cpu) {
+ spin_unlock(&dev->queue_lock);
+ spin_lock(&dev->xmit_lock);
+ dev->xmit_lock_owner = cpu;
+
+ if (!netif_queue_stopped(dev)) {
+ if (netdev_nit)
+ dev_queue_xmit_nit(skb,dev);
+
+ if (dev->hard_start_xmit(skb, dev) == 0) {
+ dev->xmit_lock_owner = -1;
+ spin_unlock_bh(&dev->xmit_lock);
+ return 0;
+ }
+ }
+ dev->xmit_lock_owner = -1;
+ spin_unlock_bh(&dev->xmit_lock);
+ if (net_ratelimit())
+ printk(KERN_CRIT "Virtual device %s asks to queue packet!\n", dev->name);
+ kfree_skb(skb);
+ return -ENETDOWN;
+ } else {
+ /* Recursion is detected! It is possible, unfortunately */
+ if (net_ratelimit())
+ printk(KERN_CRIT "Dead loop on virtual device %s, fix it urgently!\n", dev->name);
+ }
+ }
+ spin_unlock_bh(&dev->queue_lock);
+
+ kfree_skb(skb);
+ return -ENETDOWN;
+}
+
+
+/*=======================================================================
+ Receiver routines
+ =======================================================================*/
+
+int netdev_max_backlog = 300;
+int weight_p = 64; /* old backlog weight */
+/* These numbers are selected based on intuition and some
+ * experimentatiom, if you have more scientific way of doing this
+ * please go ahead and fix things.
+ */
+int no_cong_thresh = 10;
+int no_cong = 20;
+int lo_cong = 100;
+int mod_cong = 290;
+
+struct netif_rx_stats netdev_rx_stat[NR_CPUS];
+
+
+#ifdef CONFIG_NET_HW_FLOWCONTROL
+atomic_t netdev_dropping = ATOMIC_INIT(0);
+static unsigned long netdev_fc_mask = 1;
+unsigned long netdev_fc_xoff = 0;
+spinlock_t netdev_fc_lock = SPIN_LOCK_UNLOCKED;
+
+static struct
+{
+ void (*stimul)(struct net_device *);
+ struct net_device *dev;
+} netdev_fc_slots[BITS_PER_LONG];
+
+int netdev_register_fc(struct net_device *dev, void (*stimul)(struct net_device *dev))
+{
+ int bit = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&netdev_fc_lock, flags);
+ if (netdev_fc_mask != ~0UL) {
+ bit = ffz(netdev_fc_mask);
+ netdev_fc_slots[bit].stimul = stimul;
+ netdev_fc_slots[bit].dev = dev;
+ set_bit(bit, &netdev_fc_mask);
+ clear_bit(bit, &netdev_fc_xoff);
+ }
+ spin_unlock_irqrestore(&netdev_fc_lock, flags);
+ return bit;
+}
+
+void netdev_unregister_fc(int bit)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&netdev_fc_lock, flags);
+ if (bit > 0) {
+ netdev_fc_slots[bit].stimul = NULL;
+ netdev_fc_slots[bit].dev = NULL;
+ clear_bit(bit, &netdev_fc_mask);
+ clear_bit(bit, &netdev_fc_xoff);
+ }
+ spin_unlock_irqrestore(&netdev_fc_lock, flags);
+}
+
+static void netdev_wakeup(void)
+{
+ unsigned long xoff;
+
+ spin_lock(&netdev_fc_lock);
+ xoff = netdev_fc_xoff;
+ netdev_fc_xoff = 0;
+ while (xoff) {
+ int i = ffz(~xoff);
+ xoff &= ~(1<<i);
+ netdev_fc_slots[i].stimul(netdev_fc_slots[i].dev);
+ }
+ spin_unlock(&netdev_fc_lock);
+}
+#endif
+
+static void get_sample_stats(int cpu)
+{
+#ifdef RAND_LIE
+ unsigned long rd;
+ int rq;
+#endif
+ int blog = softnet_data[cpu].input_pkt_queue.qlen;
+ int avg_blog = softnet_data[cpu].avg_blog;
+
+ avg_blog = (avg_blog >> 1)+ (blog >> 1);
+
+ if (avg_blog > mod_cong) {
+ /* Above moderate congestion levels. */
+ softnet_data[cpu].cng_level = NET_RX_CN_HIGH;
+#ifdef RAND_LIE
+ rd = net_random();
+ rq = rd % netdev_max_backlog;
+ if (rq < avg_blog) /* unlucky bastard */
+ softnet_data[cpu].cng_level = NET_RX_DROP;
+#endif
+ } else if (avg_blog > lo_cong) {
+ softnet_data[cpu].cng_level = NET_RX_CN_MOD;
+#ifdef RAND_LIE
+ rd = net_random();
+ rq = rd % netdev_max_backlog;
+ if (rq < avg_blog) /* unlucky bastard */
+ softnet_data[cpu].cng_level = NET_RX_CN_HIGH;
+#endif
+ } else if (avg_blog > no_cong)
+ softnet_data[cpu].cng_level = NET_RX_CN_LOW;
+ else /* no congestion */
+ softnet_data[cpu].cng_level = NET_RX_SUCCESS;
+
+ softnet_data[cpu].avg_blog = avg_blog;
+}
+
+#ifdef OFFLINE_SAMPLE
+static void sample_queue(unsigned long dummy)
+{
+/* 10 ms 0r 1ms -- i dont care -- JHS */
+ int next_tick = 1;
+ int cpu = smp_processor_id();
+
+ get_sample_stats(cpu);
+ next_tick += jiffies;
+ mod_timer(&samp_timer, next_tick);
+}
+#endif
+
+
+/**
+ * netif_rx - post buffer to the network code
+ * @skb: buffer to post
+ *
+ * This function receives a packet from a device driver and queues it for
+ * the upper (protocol) levels to process. It always succeeds. The buffer
+ * may be dropped during processing for congestion control or by the
+ * protocol layers.
+ *
+ * return values:
+ * NET_RX_SUCCESS (no congestion)
+ * NET_RX_CN_LOW (low congestion)
+ * NET_RX_CN_MOD (moderate congestion)
+ * NET_RX_CN_HIGH (high congestion)
+ * NET_RX_DROP (packet was dropped)
+ *
+ *
+ */
+
+int netif_rx(struct sk_buff *skb)
+{
+ int this_cpu = smp_processor_id();
+ struct softnet_data *queue;
+ unsigned long flags;
+
+ if (skb->stamp.tv_sec == 0)
+ do_gettimeofday(&skb->stamp);
+
+ /* The code is rearranged so that the path is the most
+ short when CPU is congested, but is still operating.
+ */
+ queue = &softnet_data[this_cpu];
+
+ local_irq_save(flags);
+
+ netdev_rx_stat[this_cpu].total++;
+ if (queue->input_pkt_queue.qlen <= netdev_max_backlog) {
+ if (queue->input_pkt_queue.qlen) {
+ if (queue->throttle)
+ goto drop;
+
+enqueue:
+ dev_hold(skb->dev);
+ __skb_queue_tail(&queue->input_pkt_queue,skb);
+ local_irq_restore(flags);
+#ifndef OFFLINE_SAMPLE
+ get_sample_stats(this_cpu);
+#endif
+ return queue->cng_level;
+ }
+
+ if (queue->throttle) {
+ queue->throttle = 0;
+#ifdef CONFIG_NET_HW_FLOWCONTROL
+ if (atomic_dec_and_test(&netdev_dropping))
+ netdev_wakeup();
+#endif
+ }
+
+ netif_rx_schedule(&queue->blog_dev);
+ goto enqueue;
+ }
+
+ if (queue->throttle == 0) {
+ queue->throttle = 1;
+ netdev_rx_stat[this_cpu].throttled++;
+#ifdef CONFIG_NET_HW_FLOWCONTROL
+ atomic_inc(&netdev_dropping);
+#endif
+ }
+
+drop:
+ netdev_rx_stat[this_cpu].dropped++;
+ local_irq_restore(flags);
+
+ kfree_skb(skb);
+ return NET_RX_DROP;
+}
+
+/* Deliver skb to an old protocol, which is not threaded well
+ or which do not understand shared skbs.
+ */
+static int deliver_to_old_ones(struct packet_type *pt, struct sk_buff *skb, int last)
+{
+ static spinlock_t net_bh_lock = SPIN_LOCK_UNLOCKED;
+ int ret = NET_RX_DROP;
+
+
+ if (!last) {
+ skb = skb_clone(skb, GFP_ATOMIC);
+ if (skb == NULL)
+ return ret;
+ }
+ if (skb_is_nonlinear(skb) && skb_linearize(skb, GFP_ATOMIC) != 0) {
+ kfree_skb(skb);
+ return ret;
+ }
+
+ /* The assumption (correct one) is that old protocols
+ did not depened on BHs different of NET_BH and TIMER_BH.
+ */
+
+ /* Emulate NET_BH with special spinlock */
+ spin_lock(&net_bh_lock);
+
+ /* Disable timers and wait for all timers completion */
+ tasklet_disable(bh_task_vec+TIMER_BH);
+
+ ret = pt->func(skb, skb->dev, pt);
+
+ tasklet_hi_enable(bh_task_vec+TIMER_BH);
+ spin_unlock(&net_bh_lock);
+ return ret;
+}
+
+static __inline__ void skb_bond(struct sk_buff *skb)
+{
+ struct net_device *dev = skb->dev;
+
+ if (dev->master) {
+ skb->real_dev = skb->dev;
+ skb->dev = dev->master;
+ }
+}
+
+static void net_tx_action(struct softirq_action *h)
+{
+ int cpu = smp_processor_id();
+
+ if (softnet_data[cpu].completion_queue) {
+ struct sk_buff *clist;
+
+ local_irq_disable();
+ clist = softnet_data[cpu].completion_queue;
+ softnet_data[cpu].completion_queue = NULL;
+ local_irq_enable();
+
+ while (clist != NULL) {
+ struct sk_buff *skb = clist;
+ clist = clist->next;
+
+ BUG_TRAP(atomic_read(&skb->users) == 0);
+ __kfree_skb(skb);
+ }
+ }
+
+ if (softnet_data[cpu].output_queue) {
+ struct net_device *head;
+
+ local_irq_disable();
+ head = softnet_data[cpu].output_queue;
+ softnet_data[cpu].output_queue = NULL;
+ local_irq_enable();
+
+ while (head != NULL) {
+ struct net_device *dev = head;
+ head = head->next_sched;
+
+ smp_mb__before_clear_bit();
+ clear_bit(__LINK_STATE_SCHED, &dev->state);
+
+ if (spin_trylock(&dev->queue_lock)) {
+ qdisc_run(dev);
+ spin_unlock(&dev->queue_lock);
+ } else {
+ netif_schedule(dev);
+ }
+ }
+ }
+}
+
+
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+void (*br_handle_frame_hook)(struct sk_buff *skb) = NULL;
+#endif
+
+static __inline__ int handle_bridge(struct sk_buff *skb,
+ struct packet_type *pt_prev)
+{
+ int ret = NET_RX_DROP;
+
+ if (pt_prev) {
+ if (!pt_prev->data)
+ ret = deliver_to_old_ones(pt_prev, skb, 0);
+ else {
+ atomic_inc(&skb->users);
+ ret = pt_prev->func(skb, skb->dev, pt_prev);
+ }
+ }
+
+ br_handle_frame_hook(skb);
+ return ret;
+}
+
+
+#ifdef CONFIG_NET_DIVERT
+static inline int handle_diverter(struct sk_buff *skb)
+{
+ /* if diversion is supported on device, then divert */
+ if (skb->dev->divert && skb->dev->divert->divert)
+ divert_frame(skb);
+ return 0;
+}
+#endif /* CONFIG_NET_DIVERT */
+
+int netif_receive_skb(struct sk_buff *skb)
+{
+ struct packet_type *ptype, *pt_prev;
+ int ret = NET_RX_DROP;
+ unsigned short type;
+
+ if (skb->stamp.tv_sec == 0)
+ do_gettimeofday(&skb->stamp);
+
+ skb_bond(skb);
+
+ netdev_rx_stat[smp_processor_id()].total++;
+
+#ifdef CONFIG_NET_FASTROUTE
+ if (skb->pkt_type == PACKET_FASTROUTE) {
+ netdev_rx_stat[smp_processor_id()].fastroute_deferred_out++;
+ return dev_queue_xmit(skb);
+ }
+#endif
+
+ skb->h.raw = skb->nh.raw = skb->data;
+
+ pt_prev = NULL;
+ for (ptype = ptype_all; ptype; ptype = ptype->next) {
+ if (!ptype->dev || ptype->dev == skb->dev) {
+ if (pt_prev) {
+ if (!pt_prev->data) {
+ ret = deliver_to_old_ones(pt_prev, skb, 0);
+ } else {
+ atomic_inc(&skb->users);
+ ret = pt_prev->func(skb, skb->dev, pt_prev);
+ }
+ }
+ pt_prev = ptype;
+ }
+ }
+
+#ifdef CONFIG_NET_DIVERT
+ if (skb->dev->divert && skb->dev->divert->divert)
+ ret = handle_diverter(skb);
+#endif /* CONFIG_NET_DIVERT */
+
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ if (skb->dev->br_port != NULL && br_handle_frame_hook != NULL &&
+ skb->pkt_type != PACKET_LOOPBACK) {
+ return handle_bridge(skb, pt_prev);
+ }
+#endif
+
+ type = skb->protocol;
+ for (ptype=ptype_base[ntohs(type)&15];ptype;ptype=ptype->next) {
+ if (ptype->type == type &&
+ (!ptype->dev || ptype->dev == skb->dev)) {
+ if (pt_prev) {
+ if (!pt_prev->data) {
+ ret = deliver_to_old_ones(pt_prev, skb, 0);
+ } else {
+ atomic_inc(&skb->users);
+ ret = pt_prev->func(skb, skb->dev, pt_prev);
+ }
+ }
+ pt_prev = ptype;
+ }
+ }
+
+ if (pt_prev) {
+ if (!pt_prev->data) {
+ ret = deliver_to_old_ones(pt_prev, skb, 1);
+ } else {
+ ret = pt_prev->func(skb, skb->dev, pt_prev);
+ }
+ } else {
+ kfree_skb(skb);
+ /* Jamal, now you will not able to escape explaining
+ * me how you were going to use this. :-)
+ */
+ ret = NET_RX_DROP;
+ }
+
+ return ret;
+}
+
+static int process_backlog(struct net_device *backlog_dev, int *budget)
+{
+ int work = 0;
+ int quota = min(backlog_dev->quota, *budget);
+ int this_cpu = smp_processor_id();
+ struct softnet_data *queue = &softnet_data[this_cpu];
+ unsigned long start_time = jiffies;
+
+ for (;;) {
+ struct sk_buff *skb;
+ struct net_device *dev;
+
+ local_irq_disable();
+ skb = __skb_dequeue(&queue->input_pkt_queue);
+ if (skb == NULL)
+ goto job_done;
+ local_irq_enable();
+
+ dev = skb->dev;
+
+ netif_receive_skb(skb);
+
+ dev_put(dev);
+
+ work++;
+
+ if (work >= quota || jiffies - start_time > 1)
+ break;
+
+#ifdef CONFIG_NET_HW_FLOWCONTROL
+ if (queue->throttle && queue->input_pkt_queue.qlen < no_cong_thresh ) {
+ queue->throttle = 0;
+ if (atomic_dec_and_test(&netdev_dropping)) {
+ netdev_wakeup();
+ break;
+ }
+ }
+#endif
+ }
+
+ backlog_dev->quota -= work;
+ *budget -= work;
+ return -1;
+
+job_done:
+ backlog_dev->quota -= work;
+ *budget -= work;
+
+ list_del(&backlog_dev->poll_list);
+ smp_mb__before_clear_bit();
+ netif_poll_enable(backlog_dev);
+
+ if (queue->throttle) {
+ queue->throttle = 0;
+#ifdef CONFIG_NET_HW_FLOWCONTROL
+ if (atomic_dec_and_test(&netdev_dropping))
+ netdev_wakeup();
+#endif
+ }
+ local_irq_enable();
+ return 0;
+}
+
+static void net_rx_action(struct softirq_action *h)
+{
+ int this_cpu = smp_processor_id();
+ struct softnet_data *queue = &softnet_data[this_cpu];
+ unsigned long start_time = jiffies;
+ int budget = netdev_max_backlog;
+
+ br_read_lock(BR_NETPROTO_LOCK);
+ local_irq_disable();
+
+ while (!list_empty(&queue->poll_list)) {
+ struct net_device *dev;
+
+ if (budget <= 0 || jiffies - start_time > 1)
+ goto softnet_break;
+
+ local_irq_enable();
+
+ dev = list_entry(queue->poll_list.next, struct net_device, poll_list);
+
+ if (dev->quota <= 0 || dev->poll(dev, &budget)) {
+ local_irq_disable();
+ list_del(&dev->poll_list);
+ list_add_tail(&dev->poll_list, &queue->poll_list);
+ if (dev->quota < 0)
+ dev->quota += dev->weight;
+ else
+ dev->quota = dev->weight;
+ } else {
+ dev_put(dev);
+ local_irq_disable();
+ }
+ }
+
+ local_irq_enable();
+ br_read_unlock(BR_NETPROTO_LOCK);
+ return;
+
+softnet_break:
+ netdev_rx_stat[this_cpu].time_squeeze++;
+ __cpu_raise_softirq(this_cpu, NET_RX_SOFTIRQ);
+
+ local_irq_enable();
+ br_read_unlock(BR_NETPROTO_LOCK);
+}
+
+static gifconf_func_t * gifconf_list [NPROTO];
+
+/**
+ * register_gifconf - register a SIOCGIF handler
+ * @family: Address family
+ * @gifconf: Function handler
+ *
+ * Register protocol dependent address dumping routines. The handler
+ * that is passed must not be freed or reused until it has been replaced
+ * by another handler.
+ */
+
+int register_gifconf(unsigned int family, gifconf_func_t * gifconf)
+{
+ if (family>=NPROTO)
+ return -EINVAL;
+ gifconf_list[family] = gifconf;
+ return 0;
+}
+
+
+/*
+ * Map an interface index to its name (SIOCGIFNAME)
+ */
+
+/*
+ * We need this ioctl for efficient implementation of the
+ * if_indextoname() function required by the IPv6 API. Without
+ * it, we would have to search all the interfaces to find a
+ * match. --pb
+ */
+
+static int dev_ifname(struct ifreq *arg)
+{
+ struct net_device *dev;
+ struct ifreq ifr;
+
+ /*
+ * Fetch the caller's info block.
+ */
+
+ if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
+ return -EFAULT;
+
+ read_lock(&dev_base_lock);
+ dev = __dev_get_by_index(ifr.ifr_ifindex);
+ if (!dev) {
+ read_unlock(&dev_base_lock);
+ return -ENODEV;
+ }
+
+ strcpy(ifr.ifr_name, dev->name);
+ read_unlock(&dev_base_lock);
+
+ if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
+ return -EFAULT;
+ return 0;
+}
+
+/*
+ * Perform a SIOCGIFCONF call. This structure will change
+ * size eventually, and there is nothing I can do about it.
+ * Thus we will need a 'compatibility mode'.
+ */
+
+static int dev_ifconf(char *arg)
+{
+ struct ifconf ifc;
+ struct net_device *dev;
+ char *pos;
+ int len;
+ int total;
+ int i;
+
+ /*
+ * Fetch the caller's info block.
+ */
+
+ if (copy_from_user(&ifc, arg, sizeof(struct ifconf)))
+ return -EFAULT;
+
+ pos = ifc.ifc_buf;
+ len = ifc.ifc_len;
+
+ /*
+ * Loop over the interfaces, and write an info block for each.
+ */
+
+ total = 0;
+ for (dev = dev_base; dev != NULL; dev = dev->next) {
+ for (i=0; i<NPROTO; i++) {
+ if (gifconf_list[i]) {
+ int done;
+ if (pos==NULL) {
+ done = gifconf_list[i](dev, NULL, 0);
+ } else {
+ done = gifconf_list[i](dev, pos+total, len-total);
+ }
+ if (done<0) {
+ return -EFAULT;
+ }
+ total += done;
+ }
+ }
+ }
+
+ /*
+ * All done. Write the updated control block back to the caller.
+ */
+ ifc.ifc_len = total;
+
+ if (copy_to_user(arg, &ifc, sizeof(struct ifconf)))
+ return -EFAULT;
+
+ /*
+ * Both BSD and Solaris return 0 here, so we do too.
+ */
+ return 0;
+}
+
+/*
+ * This is invoked by the /proc filesystem handler to display a device
+ * in detail.
+ */
+
+#ifdef CONFIG_PROC_FS
+
+static int sprintf_stats(char *buffer, struct net_device *dev)
+{
+ struct net_device_stats *stats = (dev->get_stats ? dev->get_stats(dev): NULL);
+ int size;
+
+ if (stats)
+ size = sprintf(buffer, "%6s:%8lu %7lu %4lu %4lu %4lu %5lu %10lu %9lu %8lu %7lu %4lu %4lu %4lu %5lu %7lu %10lu\n",
+ dev->name,
+ stats->rx_bytes,
+ stats->rx_packets, stats->rx_errors,
+ stats->rx_dropped + stats->rx_missed_errors,
+ stats->rx_fifo_errors,
+ stats->rx_length_errors + stats->rx_over_errors
+ + stats->rx_crc_errors + stats->rx_frame_errors,
+ stats->rx_compressed, stats->multicast,
+ stats->tx_bytes,
+ stats->tx_packets, stats->tx_errors, stats->tx_dropped,
+ stats->tx_fifo_errors, stats->collisions,
+ stats->tx_carrier_errors + stats->tx_aborted_errors
+ + stats->tx_window_errors + stats->tx_heartbeat_errors,
+ stats->tx_compressed);
+ else
+ size = sprintf(buffer, "%6s: No statistics available.\n", dev->name);
+
+ return size;
+}
+
+/*
+ * Called from the PROCfs module. This now uses the new arbitrary sized /proc/net interface
+ * to create /proc/net/dev
+ */
+
+static int dev_get_info(char *buffer, char **start, off_t offset, int length)
+{
+ int len = 0;
+ off_t begin = 0;
+ off_t pos = 0;
+ int size;
+ struct net_device *dev;
+
+
+ size = sprintf(buffer,
+ "Inter-| Receive | Transmit\n"
+ " face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed\n");
+
+ pos += size;
+ len += size;
+
+
+ read_lock(&dev_base_lock);
+ for (dev = dev_base; dev != NULL; dev = dev->next) {
+ size = sprintf_stats(buffer+len, dev);
+ len += size;
+ pos = begin + len;
+
+ if (pos < offset) {
+ len = 0;
+ begin = pos;
+ }
+ if (pos > offset + length)
+ break;
+ }
+ read_unlock(&dev_base_lock);
+
+ *start = buffer + (offset - begin); /* Start of wanted data */
+ len -= (offset - begin); /* Start slop */
+ if (len > length)
+ len = length; /* Ending slop */
+ if (len < 0)
+ len = 0;
+ return len;
+}
+
+static int dev_proc_stats(char *buffer, char **start, off_t offset,
+ int length, int *eof, void *data)
+{
+ int i, lcpu;
+ int len=0;
+
+ for (lcpu=0; lcpu<smp_num_cpus; lcpu++) {
+ i = cpu_logical_map(lcpu);
+ len += sprintf(buffer+len, "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
+ netdev_rx_stat[i].total,
+ netdev_rx_stat[i].dropped,
+ netdev_rx_stat[i].time_squeeze,
+ netdev_rx_stat[i].throttled,
+ netdev_rx_stat[i].fastroute_hit,
+ netdev_rx_stat[i].fastroute_success,
+ netdev_rx_stat[i].fastroute_defer,
+ netdev_rx_stat[i].fastroute_deferred_out,
+#if 0
+ netdev_rx_stat[i].fastroute_latency_reduction
+#else
+ netdev_rx_stat[i].cpu_collision
+#endif
+ );
+ }
+
+ len -= offset;
+
+ if (len > length)
+ len = length;
+ if (len < 0)
+ len = 0;
+
+ *start = buffer + offset;
+ *eof = 1;
+
+ return len;
+}
+
+#endif /* CONFIG_PROC_FS */
+
+
+/**
+ * netdev_set_master - set up master/slave pair
+ * @slave: slave device
+ * @master: new master device
+ *
+ * Changes the master device of the slave. Pass %NULL to break the
+ * bonding. The caller must hold the RTNL semaphore. On a failure
+ * a negative errno code is returned. On success the reference counts
+ * are adjusted, %RTM_NEWLINK is sent to the routing socket and the
+ * function returns zero.
+ */
+
+int netdev_set_master(struct net_device *slave, struct net_device *master)
+{
+ struct net_device *old = slave->master;
+
+ ASSERT_RTNL();
+
+ if (master) {
+ if (old)
+ return -EBUSY;
+ dev_hold(master);
+ }
+
+ br_write_lock_bh(BR_NETPROTO_LOCK);
+ slave->master = master;
+ br_write_unlock_bh(BR_NETPROTO_LOCK);
+
+ if (old)
+ dev_put(old);
+
+ if (master)
+ slave->flags |= IFF_SLAVE;
+ else
+ slave->flags &= ~IFF_SLAVE;
+
+ rtmsg_ifinfo(RTM_NEWLINK, slave, IFF_SLAVE);
+ return 0;
+}
+
+/**
+ * dev_set_promiscuity - update promiscuity count on a device
+ * @dev: device
+ * @inc: modifier
+ *
+ * Add or remove promsicuity from a device. While the count in the device
+ * remains above zero the interface remains promiscuous. Once it hits zero
+ * the device reverts back to normal filtering operation. A negative inc
+ * value is used to drop promiscuity on the device.
+ */
+
+void dev_set_promiscuity(struct net_device *dev, int inc)
+{
+ unsigned short old_flags = dev->flags;
+
+ dev->flags |= IFF_PROMISC;
+ if ((dev->promiscuity += inc) == 0)
+ dev->flags &= ~IFF_PROMISC;
+ if (dev->flags^old_flags) {
+#ifdef CONFIG_NET_FASTROUTE
+ if (dev->flags&IFF_PROMISC) {
+ netdev_fastroute_obstacles++;
+ dev_clear_fastroute(dev);
+ } else
+ netdev_fastroute_obstacles--;
+#endif
+ dev_mc_upload(dev);
+ printk(KERN_INFO "device %s %s promiscuous mode\n",
+ dev->name, (dev->flags&IFF_PROMISC) ? "entered" : "left");
+ }
+}
+
+/**
+ * dev_set_allmulti - update allmulti count on a device
+ * @dev: device
+ * @inc: modifier
+ *
+ * Add or remove reception of all multicast frames to a device. While the
+ * count in the device remains above zero the interface remains listening
+ * to all interfaces. Once it hits zero the device reverts back to normal
+ * filtering operation. A negative @inc value is used to drop the counter
+ * when releasing a resource needing all multicasts.
+ */
+
+void dev_set_allmulti(struct net_device *dev, int inc)
+{
+ unsigned short old_flags = dev->flags;
+
+ dev->flags |= IFF_ALLMULTI;
+ if ((dev->allmulti += inc) == 0)
+ dev->flags &= ~IFF_ALLMULTI;
+ if (dev->flags^old_flags)
+ dev_mc_upload(dev);
+}
+
+int dev_change_flags(struct net_device *dev, unsigned flags)
+{
+ int ret;
+ int old_flags = dev->flags;
+
+ /*
+ * Set the flags on our device.
+ */
+
+ dev->flags = (flags & (IFF_DEBUG|IFF_NOTRAILERS|IFF_NOARP|IFF_DYNAMIC|
+ IFF_MULTICAST|IFF_PORTSEL|IFF_AUTOMEDIA)) |
+ (dev->flags & (IFF_UP|IFF_VOLATILE|IFF_PROMISC|IFF_ALLMULTI));
+
+ /*
+ * Load in the correct multicast list now the flags have changed.
+ */
+
+ dev_mc_upload(dev);
+
+ /*
+ * Have we downed the interface. We handle IFF_UP ourselves
+ * according to user attempts to set it, rather than blindly
+ * setting it.
+ */
+
+ ret = 0;
+ if ((old_flags^flags)&IFF_UP) /* Bit is different ? */
+ {
+ ret = ((old_flags & IFF_UP) ? dev_close : dev_open)(dev);
+
+ if (ret == 0)
+ dev_mc_upload(dev);
+ }
+
+ if (dev->flags&IFF_UP &&
+ ((old_flags^dev->flags)&~(IFF_UP|IFF_PROMISC|IFF_ALLMULTI|IFF_VOLATILE)))
+ notifier_call_chain(&netdev_chain, NETDEV_CHANGE, dev);
+
+ if ((flags^dev->gflags)&IFF_PROMISC) {
+ int inc = (flags&IFF_PROMISC) ? +1 : -1;
+ dev->gflags ^= IFF_PROMISC;
+ dev_set_promiscuity(dev, inc);
+ }
+
+ /* NOTE: order of synchronization of IFF_PROMISC and IFF_ALLMULTI
+ is important. Some (broken) drivers set IFF_PROMISC, when
+ IFF_ALLMULTI is requested not asking us and not reporting.
+ */
+ if ((flags^dev->gflags)&IFF_ALLMULTI) {
+ int inc = (flags&IFF_ALLMULTI) ? +1 : -1;
+ dev->gflags ^= IFF_ALLMULTI;
+ dev_set_allmulti(dev, inc);
+ }
+
+ if (old_flags^dev->flags)
+ rtmsg_ifinfo(RTM_NEWLINK, dev, old_flags^dev->flags);
+
+ return ret;
+}
+
+/*
+ * Perform the SIOCxIFxxx calls.
+ */
+
+static int dev_ifsioc(struct ifreq *ifr, unsigned int cmd)
+{
+ struct net_device *dev;
+ int err;
+
+ if ((dev = __dev_get_by_name(ifr->ifr_name)) == NULL)
+ return -ENODEV;
+
+ switch(cmd)
+ {
+ case SIOCGIFFLAGS: /* Get interface flags */
+ ifr->ifr_flags = (dev->flags&~(IFF_PROMISC|IFF_ALLMULTI|IFF_RUNNING))
+ |(dev->gflags&(IFF_PROMISC|IFF_ALLMULTI));
+ if (netif_running(dev) && netif_carrier_ok(dev))
+ ifr->ifr_flags |= IFF_RUNNING;
+ return 0;
+
+ case SIOCSIFFLAGS: /* Set interface flags */
+ return dev_change_flags(dev, ifr->ifr_flags);
+
+ case SIOCGIFMETRIC: /* Get the metric on the interface (currently unused) */
+ ifr->ifr_metric = 0;
+ return 0;
+
+ case SIOCSIFMETRIC: /* Set the metric on the interface (currently unused) */
+ return -EOPNOTSUPP;
+
+ case SIOCGIFMTU: /* Get the MTU of a device */
+ ifr->ifr_mtu = dev->mtu;
+ return 0;
+
+ case SIOCSIFMTU: /* Set the MTU of a device */
+ if (ifr->ifr_mtu == dev->mtu)
+ return 0;
+
+ /*
+ * MTU must be positive.
+ */
+
+ if (ifr->ifr_mtu<0)
+ return -EINVAL;
+
+ if (!netif_device_present(dev))
+ return -ENODEV;
+
+ if (dev->change_mtu)
+ err = dev->change_mtu(dev, ifr->ifr_mtu);
+ else {
+ dev->mtu = ifr->ifr_mtu;
+ err = 0;
+ }
+ if (!err && dev->flags&IFF_UP)
+ notifier_call_chain(&netdev_chain, NETDEV_CHANGEMTU, dev);
+ return err;
+
+ case SIOCGIFHWADDR:
+ memcpy(ifr->ifr_hwaddr.sa_data,dev->dev_addr, MAX_ADDR_LEN);
+ ifr->ifr_hwaddr.sa_family=dev->type;
+ return 0;
+
+ case SIOCSIFHWADDR:
+ if (dev->set_mac_address == NULL)
+ return -EOPNOTSUPP;
+ if (ifr->ifr_hwaddr.sa_family!=dev->type)
+ return -EINVAL;
+ if (!netif_device_present(dev))
+ return -ENODEV;
+ err = dev->set_mac_address(dev, &ifr->ifr_hwaddr);
+ if (!err)
+ notifier_call_chain(&netdev_chain, NETDEV_CHANGEADDR, dev);
+ return err;
+
+ case SIOCSIFHWBROADCAST:
+ if (ifr->ifr_hwaddr.sa_family!=dev->type)
+ return -EINVAL;
+ memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data, MAX_ADDR_LEN);
+ notifier_call_chain(&netdev_chain, NETDEV_CHANGEADDR, dev);
+ return 0;
+
+ case SIOCGIFMAP:
+ ifr->ifr_map.mem_start=dev->mem_start;
+ ifr->ifr_map.mem_end=dev->mem_end;
+ ifr->ifr_map.base_addr=dev->base_addr;
+ ifr->ifr_map.irq=dev->irq;
+ ifr->ifr_map.dma=dev->dma;
+ ifr->ifr_map.port=dev->if_port;
+ return 0;
+
+ case SIOCSIFMAP:
+ if (dev->set_config) {
+ if (!netif_device_present(dev))
+ return -ENODEV;
+ return dev->set_config(dev,&ifr->ifr_map);
+ }
+ return -EOPNOTSUPP;
+
+ case SIOCADDMULTI:
+ if (dev->set_multicast_list == NULL ||
+ ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
+ return -EINVAL;
+ if (!netif_device_present(dev))
+ return -ENODEV;
+ dev_mc_add(dev,ifr->ifr_hwaddr.sa_data, dev->addr_len, 1);
+ return 0;
+
+ case SIOCDELMULTI:
+ if (dev->set_multicast_list == NULL ||
+ ifr->ifr_hwaddr.sa_family!=AF_UNSPEC)
+ return -EINVAL;
+ if (!netif_device_present(dev))
+ return -ENODEV;
+ dev_mc_delete(dev,ifr->ifr_hwaddr.sa_data,dev->addr_len, 1);
+ return 0;
+
+ case SIOCGIFINDEX:
+ ifr->ifr_ifindex = dev->ifindex;
+ return 0;
+
+ case SIOCGIFTXQLEN:
+ ifr->ifr_qlen = dev->tx_queue_len;
+ return 0;
+
+ case SIOCSIFTXQLEN:
+ if (ifr->ifr_qlen<0)
+ return -EINVAL;
+ dev->tx_queue_len = ifr->ifr_qlen;
+ return 0;
+
+ case SIOCSIFNAME:
+ if (dev->flags&IFF_UP)
+ return -EBUSY;
+ /* Check if name contains a wildcard */
+ if (strchr(ifr->ifr_newname, '%')) {
+ char format[IFNAMSIZ + 1];
+ int ret;
+ memcpy(format, ifr->ifr_newname, IFNAMSIZ);
+ format[IFNAMSIZ-1] = 0;
+ /* Find a free name based on format.
+ * dev_alloc_name() replaces "%d" with at max
+ * 2 digits, so no name overflow. - Jean II */
+ ret = dev_alloc_name(dev, format);
+ if (ret < 0)
+ return ret;
+ /* Copy the new name back to caller. */
+ strncpy(ifr->ifr_newname, dev->name, IFNAMSIZ);
+ } else {
+ if (__dev_get_by_name(ifr->ifr_newname))
+ return -EEXIST;
+ memcpy(dev->name, ifr->ifr_newname, IFNAMSIZ);
+ dev->name[IFNAMSIZ-1] = 0;
+ }
+ notifier_call_chain(&netdev_chain, NETDEV_CHANGENAME, dev);
+ return 0;
+
+ /*
+ * Unknown or private ioctl
+ */
+
+ default:
+ if ((cmd >= SIOCDEVPRIVATE &&
+ cmd <= SIOCDEVPRIVATE + 15) ||
+ cmd == SIOCBONDENSLAVE ||
+ cmd == SIOCBONDRELEASE ||
+ cmd == SIOCBONDSETHWADDR ||
+ cmd == SIOCBONDSLAVEINFOQUERY ||
+ cmd == SIOCBONDINFOQUERY ||
+ cmd == SIOCBONDCHANGEACTIVE ||
+ cmd == SIOCGMIIPHY ||
+ cmd == SIOCGMIIREG ||
+ cmd == SIOCSMIIREG ||
+ cmd == SIOCWANDEV) {
+ if (dev->do_ioctl) {
+ if (!netif_device_present(dev))
+ return -ENODEV;
+ return dev->do_ioctl(dev, ifr, cmd);
+ }
+ return -EOPNOTSUPP;
+ }
+
+ }
+ return -EINVAL;
+}
+
+/*
+ * This function handles all "interface"-type I/O control requests. The actual
+ * 'doing' part of this is dev_ifsioc above.
+ */
+
+/**
+ * dev_ioctl - network device ioctl
+ * @cmd: command to issue
+ * @arg: pointer to a struct ifreq in user space
+ *
+ * Issue ioctl functions to devices. This is normally called by the
+ * user space syscall interfaces but can sometimes be useful for
+ * other purposes. The return value is the return from the syscall if
+ * positive or a negative errno code on error.
+ */
+
+int dev_ioctl(unsigned int cmd, void *arg)
+{
+ struct ifreq ifr;
+ int ret;
+ char *colon;
+
+ /* One special case: SIOCGIFCONF takes ifconf argument
+ and requires shared lock, because it sleeps writing
+ to user space.
+ */
+
+ if (cmd == SIOCGIFCONF) {
+ rtnl_shlock();
+ ret = dev_ifconf((char *) arg);
+ rtnl_shunlock();
+ return ret;
+ }
+ if (cmd == SIOCGIFNAME) {
+ return dev_ifname((struct ifreq *)arg);
+ }
+
+ if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
+ return -EFAULT;
+
+ ifr.ifr_name[IFNAMSIZ-1] = 0;
+
+ colon = strchr(ifr.ifr_name, ':');
+ if (colon)
+ *colon = 0;
+
+ /*
+ * See which interface the caller is talking about.
+ */
+
+ switch(cmd)
+ {
+ /*
+ * These ioctl calls:
+ * - can be done by all.
+ * - atomic and do not require locking.
+ * - return a value
+ */
+
+ case SIOCGIFFLAGS:
+ case SIOCGIFMETRIC:
+ case SIOCGIFMTU:
+ case SIOCGIFHWADDR:
+ case SIOCGIFSLAVE:
+ case SIOCGIFMAP:
+ case SIOCGIFINDEX:
+ case SIOCGIFTXQLEN:
+ dev_load(ifr.ifr_name);
+ read_lock(&dev_base_lock);
+ ret = dev_ifsioc(&ifr, cmd);
+ read_unlock(&dev_base_lock);
+ if (!ret) {
+ if (colon)
+ *colon = ':';
+ if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
+ return -EFAULT;
+ }
+ return ret;
+
+ case SIOCETHTOOL:
+ dev_load(ifr.ifr_name);
+ rtnl_lock();
+ ret = dev_ethtool(&ifr);
+ rtnl_unlock();
+ if (!ret) {
+ if (colon)
+ *colon = ':';
+ if (copy_to_user(arg, &ifr,
+ sizeof(struct ifreq)))
+ ret = -EFAULT;
+ }
+ return ret;
+
+ /*
+ * These ioctl calls:
+ * - require superuser power.
+ * - require strict serialization.
+ * - return a value
+ */
+
+ case SIOCSIFNAME:
+ case SIOCGMIIPHY:
+ case SIOCGMIIREG:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ dev_load(ifr.ifr_name);
+ dev_probe_lock();
+ rtnl_lock();
+ ret = dev_ifsioc(&ifr, cmd);
+ rtnl_unlock();
+ dev_probe_unlock();
+ if (!ret) {
+ if (colon)
+ *colon = ':';
+ if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
+ return -EFAULT;
+ }
+ return ret;
+
+ /*
+ * These ioctl calls:
+ * - require superuser power.
+ * - require strict serialization.
+ * - do not return a value
+ */
+
+ case SIOCSIFFLAGS:
+ case SIOCSIFMETRIC:
+ case SIOCSIFMTU:
+ case SIOCSIFMAP:
+ case SIOCSIFHWADDR:
+ case SIOCSIFSLAVE:
+ case SIOCADDMULTI:
+ case SIOCDELMULTI:
+ case SIOCSIFHWBROADCAST:
+ case SIOCSIFTXQLEN:
+ case SIOCSMIIREG:
+ case SIOCBONDENSLAVE:
+ case SIOCBONDRELEASE:
+ case SIOCBONDSETHWADDR:
+ case SIOCBONDSLAVEINFOQUERY:
+ case SIOCBONDINFOQUERY:
+ case SIOCBONDCHANGEACTIVE:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ dev_load(ifr.ifr_name);
+ dev_probe_lock();
+ rtnl_lock();
+ ret = dev_ifsioc(&ifr, cmd);
+ rtnl_unlock();
+ dev_probe_unlock();
+ return ret;
+
+ case SIOCGIFMEM:
+ /* Get the per device memory space. We can add this but currently
+ do not support it */
+ case SIOCSIFMEM:
+ /* Set the per device memory buffer space. Not applicable in our case */
+ case SIOCSIFLINK:
+ return -EINVAL;
+
+ /*
+ * Unknown or private ioctl.
+ */
+
+ default:
+ if (cmd == SIOCWANDEV ||
+ (cmd >= SIOCDEVPRIVATE &&
+ cmd <= SIOCDEVPRIVATE + 15)) {
+ dev_load(ifr.ifr_name);
+ dev_probe_lock();
+ rtnl_lock();
+ ret = dev_ifsioc(&ifr, cmd);
+ rtnl_unlock();
+ dev_probe_unlock();
+ if (!ret && copy_to_user(arg, &ifr, sizeof(struct ifreq)))
+ return -EFAULT;
+ return ret;
+ }
+#ifdef WIRELESS_EXT
+ /* Take care of Wireless Extensions */
+ if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) {
+ /* If command is `set a parameter', or
+ * `get the encoding parameters', check if
+ * the user has the right to do it */
+ if (IW_IS_SET(cmd) || (cmd == SIOCGIWENCODE)) {
+ if(!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ }
+ dev_load(ifr.ifr_name);
+ rtnl_lock();
+ /* Follow me in net/core/wireless.c */
+ ret = wireless_process_ioctl(&ifr, cmd);
+ rtnl_unlock();
+ if (!ret && IW_IS_GET(cmd) &&
+ copy_to_user(arg, &ifr, sizeof(struct ifreq)))
+ return -EFAULT;
+ return ret;
+ }
+#endif /* WIRELESS_EXT */
+ return -EINVAL;
+ }
+}
+
+
+/**
+ * dev_new_index - allocate an ifindex
+ *
+ * Returns a suitable unique value for a new device interface
+ * number. The caller must hold the rtnl semaphore or the
+ * dev_base_lock to be sure it remains unique.
+ */
+
+int dev_new_index(void)
+{
+ static int ifindex;
+ for (;;) {
+ if (++ifindex <= 0)
+ ifindex=1;
+ if (__dev_get_by_index(ifindex) == NULL)
+ return ifindex;
+ }
+}
+
+static int dev_boot_phase = 1;
+
+/**
+ * register_netdevice - register a network device
+ * @dev: device to register
+ *
+ * Take a completed network device structure and add it to the kernel
+ * interfaces. A %NETDEV_REGISTER message is sent to the netdev notifier
+ * chain. 0 is returned on success. A negative errno code is returned
+ * on a failure to set up the device, or if the name is a duplicate.
+ *
+ * Callers must hold the rtnl semaphore. See the comment at the
+ * end of Space.c for details about the locking. You may want
+ * register_netdev() instead of this.
+ *
+ * BUGS:
+ * The locking appears insufficient to guarantee two parallel registers
+ * will not get the same name.
+ */
+
+int net_dev_init(void);
+
+int register_netdevice(struct net_device *dev)
+{
+ struct net_device *d, **dp;
+#ifdef CONFIG_NET_DIVERT
+ int ret;
+#endif
+
+ spin_lock_init(&dev->queue_lock);
+ spin_lock_init(&dev->xmit_lock);
+ dev->xmit_lock_owner = -1;
+#ifdef CONFIG_NET_FASTROUTE
+ dev->fastpath_lock=RW_LOCK_UNLOCKED;
+#endif
+
+ if (dev_boot_phase)
+ net_dev_init();
+
+#ifdef CONFIG_NET_DIVERT
+ ret = alloc_divert_blk(dev);
+ if (ret)
+ return ret;
+#endif /* CONFIG_NET_DIVERT */
+
+ dev->iflink = -1;
+
+ /* Init, if this function is available */
+ if (dev->init && dev->init(dev) != 0) {
+#ifdef CONFIG_NET_DIVERT
+ free_divert_blk(dev);
+#endif
+ return -EIO;
+ }
+
+ dev->ifindex = dev_new_index();
+ if (dev->iflink == -1)
+ dev->iflink = dev->ifindex;
+
+ /* Check for existence, and append to tail of chain */
+ for (dp=&dev_base; (d=*dp) != NULL; dp=&d->next) {
+ if (d == dev || strcmp(d->name, dev->name) == 0) {
+#ifdef CONFIG_NET_DIVERT
+ free_divert_blk(dev);
+#endif
+ return -EEXIST;
+ }
+ }
+
+ /* Fix illegal SG+CSUM combinations. */
+ if ((dev->features & NETIF_F_SG) &&
+ !(dev->features & (NETIF_F_IP_CSUM |
+ NETIF_F_NO_CSUM |
+ NETIF_F_HW_CSUM))) {
+ printk("%s: Dropping NETIF_F_SG since no checksum feature.\n",
+ dev->name);
+ dev->features &= ~NETIF_F_SG;
+ }
+
+ /*
+ * nil rebuild_header routine,
+ * that should be never called and used as just bug trap.
+ */
+
+ if (dev->rebuild_header == NULL)
+ dev->rebuild_header = default_rebuild_header;
+
+ /*
+ * Default initial state at registry is that the
+ * device is present.
+ */
+
+ set_bit(__LINK_STATE_PRESENT, &dev->state);
+
+ dev->next = NULL;
+ dev_init_scheduler(dev);
+ write_lock_bh(&dev_base_lock);
+ *dp = dev;
+ dev_hold(dev);
+ dev->deadbeaf = 0;
+ write_unlock_bh(&dev_base_lock);
+
+ /* Notify protocols, that a new device appeared. */
+ notifier_call_chain(&netdev_chain, NETDEV_REGISTER, dev);
+
+ net_run_sbin_hotplug(dev, "register");
+
+ return 0;
+}
+
+/**
+ * netdev_finish_unregister - complete unregistration
+ * @dev: device
+ *
+ * Destroy and free a dead device. A value of zero is returned on
+ * success.
+ */
+
+int netdev_finish_unregister(struct net_device *dev)
+{
+ BUG_TRAP(dev->ip_ptr==NULL);
+ BUG_TRAP(dev->ip6_ptr==NULL);
+ BUG_TRAP(dev->dn_ptr==NULL);
+
+ if (!dev->deadbeaf) {
+ printk(KERN_ERR "Freeing alive device %p, %s\n", dev, dev->name);
+ return 0;
+ }
+#ifdef NET_REFCNT_DEBUG
+ printk(KERN_DEBUG "netdev_finish_unregister: %s%s.\n", dev->name,
+ (dev->features & NETIF_F_DYNALLOC)?"":", old style");
+#endif
+ if (dev->destructor)
+ dev->destructor(dev);
+ if (dev->features & NETIF_F_DYNALLOC)
+ kfree(dev);
+ return 0;
+}
+
+/**
+ * unregister_netdevice - remove device from the kernel
+ * @dev: device
+ *
+ * This function shuts down a device interface and removes it
+ * from the kernel tables. On success 0 is returned, on a failure
+ * a negative errno code is returned.
+ *
+ * Callers must hold the rtnl semaphore. See the comment at the
+ * end of Space.c for details about the locking. You may want
+ * unregister_netdev() instead of this.
+ */
+
+int unregister_netdevice(struct net_device *dev)
+{
+ unsigned long now, warning_time;
+ struct net_device *d, **dp;
+
+ /* If device is running, close it first. */
+ if (dev->flags & IFF_UP)
+ dev_close(dev);
+
+ BUG_TRAP(dev->deadbeaf==0);
+ dev->deadbeaf = 1;
+
+ /* And unlink it from device chain. */
+ for (dp = &dev_base; (d=*dp) != NULL; dp=&d->next) {
+ if (d == dev) {
+ write_lock_bh(&dev_base_lock);
+ *dp = d->next;
+ write_unlock_bh(&dev_base_lock);
+ break;
+ }
+ }
+ if (d == NULL) {
+ printk(KERN_DEBUG "unregister_netdevice: device %s/%p never was registered\n", dev->name, dev);
+ return -ENODEV;
+ }
+
+ /* Synchronize to net_rx_action. */
+ br_write_lock_bh(BR_NETPROTO_LOCK);
+ br_write_unlock_bh(BR_NETPROTO_LOCK);
+
+ if (dev_boot_phase == 0) {
+#ifdef CONFIG_NET_FASTROUTE
+ dev_clear_fastroute(dev);
+#endif
+
+ /* Shutdown queueing discipline. */
+ dev_shutdown(dev);
+
+ net_run_sbin_hotplug(dev, "unregister");
+
+ /* Notify protocols, that we are about to destroy
+ this device. They should clean all the things.
+ */
+ notifier_call_chain(&netdev_chain, NETDEV_UNREGISTER, dev);
+
+ /*
+ * Flush the multicast chain
+ */
+ dev_mc_discard(dev);
+ }
+
+ if (dev->uninit)
+ dev->uninit(dev);
+
+ /* Notifier chain MUST detach us from master device. */
+ BUG_TRAP(dev->master==NULL);
+
+#ifdef CONFIG_NET_DIVERT
+ free_divert_blk(dev);
+#endif
+
+ if (dev->features & NETIF_F_DYNALLOC) {
+#ifdef NET_REFCNT_DEBUG
+ if (atomic_read(&dev->refcnt) != 1)
+ printk(KERN_DEBUG "unregister_netdevice: holding %s refcnt=%d\n", dev->name, atomic_read(&dev->refcnt)-1);
+#endif
+ dev_put(dev);
+ return 0;
+ }
+
+ /* Last reference is our one */
+ if (atomic_read(&dev->refcnt) == 1) {
+ dev_put(dev);
+ return 0;
+ }
+
+#ifdef NET_REFCNT_DEBUG
+ printk("unregister_netdevice: waiting %s refcnt=%d\n", dev->name, atomic_read(&dev->refcnt));
+#endif
+
+ /* EXPLANATION. If dev->refcnt is not now 1 (our own reference)
+ it means that someone in the kernel still has a reference
+ to this device and we cannot release it.
+
+ "New style" devices have destructors, hence we can return from this
+ function and destructor will do all the work later. As of kernel 2.4.0
+ there are very few "New Style" devices.
+
+ "Old style" devices expect that the device is free of any references
+ upon exit from this function.
+ We cannot return from this function until all such references have
+ fallen away. This is because the caller of this function will probably
+ immediately kfree(*dev) and then be unloaded via sys_delete_module.
+
+ So, we linger until all references fall away. The duration of the
+ linger is basically unbounded! It is driven by, for example, the
+ current setting of sysctl_ipfrag_time.
+
+ After 1 second, we start to rebroadcast unregister notifications
+ in hope that careless clients will release the device.
+
+ */
+
+ now = warning_time = jiffies;
+ while (atomic_read(&dev->refcnt) != 1) {
+ if ((jiffies - now) > 1*HZ) {
+ /* Rebroadcast unregister notification */
+ notifier_call_chain(&netdev_chain, NETDEV_UNREGISTER, dev);
+ }
+ current->state = TASK_INTERRUPTIBLE;
+ schedule_timeout(HZ/4);
+ current->state = TASK_RUNNING;
+ if ((jiffies - warning_time) > 10*HZ) {
+ printk(KERN_EMERG "unregister_netdevice: waiting for %s to "
+ "become free. Usage count = %d\n",
+ dev->name, atomic_read(&dev->refcnt));
+ warning_time = jiffies;
+ }
+ }
+ dev_put(dev);
+ return 0;
+}
+
+
+/*
+ * Initialize the DEV module. At boot time this walks the device list and
+ * unhooks any devices that fail to initialise (normally hardware not
+ * present) and leaves us with a valid list of present and active devices.
+ *
+ */
+
+extern void net_device_init(void);
+extern void ip_auto_config(void);
+struct proc_dir_entry *proc_net_drivers;
+#ifdef CONFIG_NET_DIVERT
+extern void dv_init(void);
+#endif /* CONFIG_NET_DIVERT */
+
+
+/*
+ * Callers must hold the rtnl semaphore. See the comment at the
+ * end of Space.c for details about the locking.
+ */
+int __init net_dev_init(void)
+{
+ struct net_device *dev, **dp;
+ int i;
+
+ if (!dev_boot_phase)
+ return 0;
+
+
+#ifdef CONFIG_NET_DIVERT
+ dv_init();
+#endif /* CONFIG_NET_DIVERT */
+
+ /*
+ * Initialise the packet receive queues.
+ */
+
+ for (i = 0; i < NR_CPUS; i++) {
+ struct softnet_data *queue;
+
+ queue = &softnet_data[i];
+ skb_queue_head_init(&queue->input_pkt_queue);
+ queue->throttle = 0;
+ queue->cng_level = 0;
+ queue->avg_blog = 10; /* arbitrary non-zero */
+ queue->completion_queue = NULL;
+ INIT_LIST_HEAD(&queue->poll_list);
+ set_bit(__LINK_STATE_START, &queue->blog_dev.state);
+ queue->blog_dev.weight = weight_p;
+ queue->blog_dev.poll = process_backlog;
+ atomic_set(&queue->blog_dev.refcnt, 1);
+ }
+
+#ifdef CONFIG_NET_PROFILE
+ net_profile_init();
+ NET_PROFILE_REGISTER(dev_queue_xmit);
+ NET_PROFILE_REGISTER(softnet_process);
+#endif
+
+#ifdef OFFLINE_SAMPLE
+ samp_timer.expires = jiffies + (10 * HZ);
+ add_timer(&samp_timer);
+#endif
+
+ /*
+ * Add the devices.
+ * If the call to dev->init fails, the dev is removed
+ * from the chain disconnecting the device until the
+ * next reboot.
+ *
+ * NB At boot phase networking is dead. No locking is required.
+ * But we still preserve dev_base_lock for sanity.
+ */
+
+ dp = &dev_base;
+ while ((dev = *dp) != NULL) {
+ spin_lock_init(&dev->queue_lock);
+ spin_lock_init(&dev->xmit_lock);
+#ifdef CONFIG_NET_FASTROUTE
+ dev->fastpath_lock = RW_LOCK_UNLOCKED;
+#endif
+ dev->xmit_lock_owner = -1;
+ dev->iflink = -1;
+ dev_hold(dev);
+
+ /*
+ * Allocate name. If the init() fails
+ * the name will be reissued correctly.
+ */
+ if (strchr(dev->name, '%'))
+ dev_alloc_name(dev, dev->name);
+
+ /*
+ * Check boot time settings for the device.
+ */
+ netdev_boot_setup_check(dev);
+
+ if (dev->init && dev->init(dev)) {
+ /*
+ * It failed to come up. It will be unhooked later.
+ * dev_alloc_name can now advance to next suitable
+ * name that is checked next.
+ */
+ dev->deadbeaf = 1;
+ dp = &dev->next;
+ } else {
+ dp = &dev->next;
+ dev->ifindex = dev_new_index();
+ if (dev->iflink == -1)
+ dev->iflink = dev->ifindex;
+ if (dev->rebuild_header == NULL)
+ dev->rebuild_header = default_rebuild_header;
+ dev_init_scheduler(dev);
+ set_bit(__LINK_STATE_PRESENT, &dev->state);
+ }
+ }
+
+ /*
+ * Unhook devices that failed to come up
+ */
+ dp = &dev_base;
+ while ((dev = *dp) != NULL) {
+ if (dev->deadbeaf) {
+ write_lock_bh(&dev_base_lock);
+ *dp = dev->next;
+ write_unlock_bh(&dev_base_lock);
+ dev_put(dev);
+ } else {
+ dp = &dev->next;
+ }
+ }
+
+#ifdef CONFIG_PROC_FS
+ proc_net_create("dev", 0, dev_get_info);
+ create_proc_read_entry("net/softnet_stat", 0, 0, dev_proc_stats, NULL);
+ proc_net_drivers = proc_mkdir("net/drivers", 0);
+#ifdef WIRELESS_EXT
+ /* Available in net/core/wireless.c */
+ proc_net_create("wireless", 0, dev_get_wireless_info);
+#endif /* WIRELESS_EXT */
+#endif /* CONFIG_PROC_FS */
+
+ dev_boot_phase = 0;
+
+ open_softirq(NET_TX_SOFTIRQ, net_tx_action, NULL);
+ open_softirq(NET_RX_SOFTIRQ, net_rx_action, NULL);
+
+ dst_init();
+ dev_mcast_init();
+
+#ifdef CONFIG_NET_SCHED
+ pktsched_init();
+#endif
+ /*
+ * Initialise network devices
+ */
+
+ net_device_init();
+
+ return 0;
+}
+
+#ifdef CONFIG_HOTPLUG
+
+/* Notify userspace when a netdevice event occurs,
+ * by running '/sbin/hotplug net' with certain
+ * environment variables set.
+ */
+
+static int net_run_sbin_hotplug(struct net_device *dev, char *action)
+{
+ char *argv[3], *envp[5], ifname[12 + IFNAMSIZ], action_str[32];
+ int i;
+
+ sprintf(ifname, "INTERFACE=%s", dev->name);
+ sprintf(action_str, "ACTION=%s", action);
+
+ i = 0;
+ argv[i++] = hotplug_path;
+ argv[i++] = "net";
+ argv[i] = 0;
+
+ i = 0;
+ /* minimal command environment */
+ envp [i++] = "HOME=/";
+ envp [i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
+ envp [i++] = ifname;
+ envp [i++] = action_str;
+ envp [i] = 0;
+
+ return call_usermodehelper(argv [0], argv, envp);
+}
+#endif
diff --unified --recursive --new-file linux-2.4.30/net/netsyms.c linux-2.4.30-1-686-smp-ring3/net/netsyms.c
--- linux-2.4.30/net/netsyms.c 2005-04-04 03:42:20.000000000 +0200
+++ linux-2.4.30-1-686-smp-ring3/net/netsyms.c 2005-10-22 23:08:28.016050500 +0200
@@ -628,3 +628,18 @@
#endif /* CONFIG_NET_RADIO || CONFIG_NET_PCMCIA_RADIO */
#endif /* CONFIG_NET */
+#if defined (CONFIG_RING) || defined(CONFIG_RING_MODULE)
+#include <linux/version.h>
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0))
+#include <linux/ring.h>
+
+EXPORT_SYMBOL(get_skb_ring_handler);
+EXPORT_SYMBOL(set_skb_ring_handler);
+EXPORT_SYMBOL(do_skb_ring_handler);
+EXPORT_SYMBOL(get_buffer_ring_handler);
+EXPORT_SYMBOL(set_buffer_ring_handler);
+EXPORT_SYMBOL(do_buffer_ring_handler);
+#endif
+
+#endif
diff --unified --recursive --new-file linux-2.4.30/net/ring/Config.in linux-2.4.30-1-686-smp-ring3/net/ring/Config.in
--- linux-2.4.30/net/ring/Config.in 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.4.30-1-686-smp-ring3/net/ring/Config.in 2005-10-22 23:08:28.048052500 +0200
@@ -0,0 +1,4 @@
+#
+# PF_RING
+#
+tristate ' PF_RING (EXPERIMENTAL)' CONFIG_RING
diff --unified --recursive --new-file linux-2.4.30/net/ring/Makefile linux-2.4.30-1-686-smp-ring3/net/ring/Makefile
--- linux-2.4.30/net/ring/Makefile 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.4.30-1-686-smp-ring3/net/ring/Makefile 2005-10-22 23:08:27.420013250 +0200
@@ -0,0 +1,16 @@
+#
+# Makefile for the ring driver.
+#
+
+O_TARGET := ring.o
+
+export-objs := ring_packet.o
+
+obj-y := ring_packet.o
+
+ifeq ($(CONFIG_RING),m)
+ obj-m += $(O_TARGET)
+endif
+
+include $(TOPDIR)/Rules.make
+
diff --unified --recursive --new-file linux-2.4.30/net/ring/ring_packet.c linux-2.4.30-1-686-smp-ring3/net/ring/ring_packet.c
--- linux-2.4.30/net/ring/ring_packet.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.4.30-1-686-smp-ring3/net/ring/ring_packet.c 2005-10-22 23:08:27.440014500 +0200
@@ -0,0 +1,1623 @@
+/*
+ *
+ * (C) 2004-05 - Luca Deri <deri@ntop.org>
+ *
+ * This code includes patches courtesy of
+ * - Jeff Randall <jrandall@nexvu.com>
+ * - Helmut Manck <helmut.manck@secunet.com>
+ * - Brad Doctor <bdoctor@ps-ax.com>
+ *
+ */
+
+/* FIX: add an entry inside the /proc filesystem */
+
+#include <linux/version.h>
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/socket.h>
+#include <linux/skbuff.h>
+#include <linux/rtnetlink.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/init.h>
+#include <linux/filter.h>
+#include <linux/ring.h>
+#include <linux/ip.h>
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#include <linux/list.h>
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
+#include <net/xfrm.h>
+#else
+#include <linux/poll.h>
+#endif
+#include <net/sock.h>
+#include <asm/io.h> /* needed for virt_to_phys() */
+
+/* #define RING_DEBUG */
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,11))
+static inline int remap_page_range(struct vm_area_struct *vma,
+ unsigned long uvaddr,
+ unsigned long paddr,
+ unsigned long size,
+ pgprot_t prot) {
+ return(remap_pfn_range(vma, uvaddr, paddr >> PAGE_SHIFT,
+ size, prot));
+}
+#endif
+
+/* ************************************************* */
+
+#define CLUSTER_LEN 8
+
+struct ring_cluster {
+ u_short cluster_id; /* 0 = no cluster */
+ u_short num_cluster_elements;
+ enum cluster_type hashing_mode;
+ u_short hashing_id;
+ struct sock *sk[CLUSTER_LEN];
+ struct ring_cluster *next; /* NULL = last element of the cluster */
+};
+
+/* ************************************************* */
+
+struct ring_element {
+ struct list_head list;
+ struct sock *sk;
+};
+
+/* ************************************************* */
+
+struct ring_opt {
+ struct net_device *ring_netdev;
+
+ /* Cluster */
+ u_short cluster_id; /* 0 = no cluster */
+
+ /* Reflector */
+ struct net_device *reflector_dev;
+
+ /* Packet buffers */
+ unsigned long order;
+
+ /* Ring Slots */
+ unsigned long ring_memory;
+ FlowSlotInfo *slots_info; /* Basically it points to ring_memory */
+ char *ring_slots; /* Basically it points to ring_memory
+ +sizeof(FlowSlotInfo) */
+
+ /* Packet Sampling */
+ u_int pktToSample, sample_rate;
+
+ /* BPF Filter */
+ struct sk_filter *bpfFilter;
+
+ /* Locks */
+ atomic_t num_ring_slots_waiters;
+ wait_queue_head_t ring_slots_waitqueue;
+ rwlock_t ring_index_lock;
+
+ /* Indexes (Internal) */
+ u_int insert_page_id, insert_slot_id;
+};
+
+/* ************************************************* */
+
+/* List of all ring sockets. */
+static struct list_head ring_table;
+
+/* List of all clusters */
+static struct ring_cluster *ring_cluster_list;
+
+static rwlock_t ring_mgmt_lock = RW_LOCK_UNLOCKED;
+
+/* ********************************** */
+
+/* Forward */
+static struct proto_ops ring_ops;
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,11))
+static struct proto ring_proto;
+#endif
+
+static int skb_ring_handler(struct sk_buff *skb, u_char recv_packet,
+ u_char real_skb);
+static int buffer_ring_handler(struct net_device *dev, char *data, int len);
+static int remove_from_cluster(struct sock *sock, struct ring_opt *pfr);
+
+/* Extern */
+
+/* ********************************** */
+
+/* Defaults */
+static u_int bucket_len = 128, num_slots = 4096, sample_rate = 1,
+ transparent_mode = 0, enable_tx_capture = 0;
+
+MODULE_PARM(bucket_len, "i");
+MODULE_PARM_DESC(bucket_len, "Number of ring buckets");
+MODULE_PARM(num_slots, "i");
+MODULE_PARM_DESC(num_slots, "Number of ring slots");
+MODULE_PARM(sample_rate, "i");
+MODULE_PARM_DESC(sample_rate, "Ring packet sample rate");
+MODULE_PARM(transparent_mode, "i");
+MODULE_PARM_DESC(transparent_mode,
+ "Set to 1 to set transparent mode "
+ "(slower but backwards compatible)");
+MODULE_PARM(enable_tx_capture, "i");
+MODULE_PARM_DESC(enable_tx_capture, "Set to 1 to capture outgoing packets");
+
+/* ********************************** */
+
+#define MIN_QUEUED_PKTS 64
+#define MAX_QUEUE_LOOPS 64
+
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
+#define ring_sk_datatype(__sk) ((struct ring_opt *)__sk)
+#define ring_sk(__sk) ((__sk)->sk_protinfo)
+#else
+#define ring_sk_datatype(a) (a)
+#define ring_sk(__sk) ((__sk)->protinfo.pf_ring)
+#endif
+
+#define _rdtsc() ({ uint64_t x; asm volatile("rdtsc" : "=A" (x)); x; })
+
+/*
+ int dev_queue_xmit(struct sk_buff *skb)
+ skb->dev;
+ struct net_device *dev_get_by_name(const char *name)
+*/
+
+/* ********************************** */
+
+static void ring_sock_destruct(struct sock *sk) {
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
+ skb_queue_purge(&sk->sk_receive_queue);
+
+ if (!sock_flag(sk, SOCK_DEAD)) {
+#if defined(RING_DEBUG)
+ printk("Attempt to release alive ring socket: %p\n", sk);
+#endif
+ return;
+ }
+
+ BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
+ BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
+#else
+
+ BUG_TRAP(atomic_read(&sk->rmem_alloc)==0);
+ BUG_TRAP(atomic_read(&sk->wmem_alloc)==0);
+
+ if (!sk->dead) {
+#if defined(RING_DEBUG)
+ printk("Attempt to release alive ring socket: %p\n", sk);
+#endif
+ return;
+ }
+#endif
+
+ kfree(ring_sk(sk));
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0))
+ MOD_DEC_USE_COUNT;
+#endif
+}
+
+/* ********************************** */
+/*
+ * ring_insert()
+ *
+ * store the sk in a new element and add it
+ * to the head of the list.
+ */
+static inline void ring_insert(struct sock *sk) {
+ struct ring_element *next;
+
+#if defined(RING_DEBUG)
+ printk("RING: ring_insert()\n");
+#endif
+
+ next = kmalloc(sizeof(struct ring_element), GFP_ATOMIC);
+ if(next != NULL) {
+ next->sk = sk;
+ write_lock_irq(&ring_mgmt_lock);
+ list_add(&next->list, &ring_table);
+ write_unlock_irq(&ring_mgmt_lock);
+ } else {
+ if (net_ratelimit())
+ printk("RING: could not kmalloc slot!!\n");
+ }
+}
+
+/* ********************************** */
+/*
+ * ring_remove()
+ *
+ * For each of the elements in the list:
+ * - check if this is the element we want to delete
+ * - if it is, remove it from the list, and free it.
+ *
+ * stop when we find the one we're looking for (break),
+ * or when we reach the end of the list.
+ */
+static inline void ring_remove(struct sock *sk) {
+ struct list_head *ptr;
+ struct ring_element *entry;
+
+
+ for(ptr = ring_table.next; ptr != &ring_table; ptr = ptr->next) {
+ entry = list_entry(ptr, struct ring_element, list);
+
+ if(entry->sk == sk) {
+ write_lock_irq(&ring_mgmt_lock);
+ list_del(ptr);
+ kfree(ptr);
+ write_unlock_irq(&ring_mgmt_lock);
+ break;
+ }
+ }
+
+}
+
+/* ********************************** */
+
+static u_int32_t num_queued_pkts(struct ring_opt *pfr) {
+
+ if(pfr->ring_slots != NULL) {
+
+ u_int32_t tot_insert = pfr->slots_info->insert_idx,
+#if defined(RING_DEBUG)
+ tot_read = pfr->slots_info->tot_read, tot_pkts;
+#else
+ tot_read = pfr->slots_info->tot_read;
+#endif
+
+ if(tot_insert >= tot_read) {
+#if defined(RING_DEBUG)
+ tot_pkts = tot_insert-tot_read;
+#endif
+ return(tot_insert-tot_read);
+ } else {
+#if defined(RING_DEBUG)
+ tot_pkts = ((u_int32_t)-1)+tot_insert-tot_read;
+#endif
+ return(((u_int32_t)-1)+tot_insert-tot_read);
+ }
+
+#if defined(RING_DEBUG)
+ printk("-> num_queued_pkts=%d [tot_insert=%d][tot_read=%d]\n",
+ tot_pkts, tot_insert, tot_read);
+#endif
+
+ } else
+ return(0);
+}
+
+/* ********************************** */
+
+static inline FlowSlot* get_insert_slot(struct ring_opt *pfr) {
+#if defined(RING_DEBUG)
+ printk("get_insert_slot(%d)\n", pfr->slots_info->insert_idx);
+#endif
+
+ if(pfr->ring_slots != NULL) {
+ FlowSlot *slot = (FlowSlot*)&(pfr->ring_slots[pfr->slots_info->insert_idx
+ *pfr->slots_info->slot_len]);
+ return(slot);
+ } else
+ return(NULL);
+}
+
+/* ********************************** */
+
+static inline FlowSlot* get_remove_slot(struct ring_opt *pfr) {
+#if defined(RING_DEBUG)
+ printk("get_remove_slot(%d)\n", pfr->slots_info->remove_idx);
+#endif
+
+ if(pfr->ring_slots != NULL)
+ return((FlowSlot*)&(pfr->ring_slots[pfr->slots_info->remove_idx*
+ pfr->slots_info->slot_len]));
+ else
+ return(NULL);
+}
+
+/* ********************************** */
+
+static void add_skb_to_ring(struct sk_buff *skb,
+ struct ring_opt *pfr,
+ u_char recv_packet,
+ u_char real_skb /* 1=skb 0=faked skb */) {
+ FlowSlot *theSlot;
+ int idx, displ;
+
+ if(recv_packet) {
+ /* Hack for identifying a packet received by the e1000 */
+ if(real_skb) {
+ displ = SKB_DISPLACEMENT;
+ } else
+ displ = 0; /* Received by the e1000 wrapper */
+ } else
+ displ = 0;
+
+ write_lock(&pfr->ring_index_lock);
+ pfr->slots_info->tot_pkts++;
+ write_unlock(&pfr->ring_index_lock);
+
+ /* BPF Filtering (from af_packet.c) */
+ if(pfr->bpfFilter != NULL) {
+ unsigned res = 1, len;
+
+ len = skb->len-skb->data_len;
+
+ write_lock(&pfr->ring_index_lock);
+ skb->data -= displ;
+ res = sk_run_filter(skb, pfr->bpfFilter->insns, pfr->bpfFilter->len);
+ skb->data += displ;
+ write_unlock(&pfr->ring_index_lock);
+
+ if(res == 0) {
+ /* Filter failed */
+
+#if defined(RING_DEBUG)
+ printk("add_skb_to_ring(skb): Filter failed [len=%d][tot=%llu]"
+ "[insertIdx=%d][pkt_type=%d][cloned=%d]\n",
+ (int)skb->len, pfr->slots_info->tot_pkts,
+ pfr->slots_info->insert_idx,
+ skb->pkt_type, skb->cloned);
+#endif
+
+ return;
+ }
+ }
+
+ /* ************************** */
+
+ if(pfr->sample_rate > 1) {
+ if(pfr->pktToSample == 0) {
+ write_lock(&pfr->ring_index_lock);
+ pfr->pktToSample = pfr->sample_rate;
+ write_unlock(&pfr->ring_index_lock);
+ } else {
+ write_lock(&pfr->ring_index_lock);
+ pfr->pktToSample--;
+ write_unlock(&pfr->ring_index_lock);
+
+#if defined(RING_DEBUG)
+ printk("add_skb_to_ring(skb): sampled packet [len=%d]"
+ "[tot=%llu][insertIdx=%d][pkt_type=%d][cloned=%d]\n",
+ (int)skb->len, pfr->slots_info->tot_pkts,
+ pfr->slots_info->insert_idx,
+ skb->pkt_type, skb->cloned);
+#endif
+ return;
+ }
+ }
+
+ /* ************************************* */
+
+ if((pfr->reflector_dev != NULL)
+ && (!netif_queue_stopped(pfr->reflector_dev))) {
+ int cpu = smp_processor_id();
+
+ /* increase reference counter so that this skb is not freed */
+ atomic_inc(&skb->users);
+
+ skb->data -= displ;
+
+ /* send it */
+ if (pfr->reflector_dev->xmit_lock_owner != cpu) {
+ spin_lock_bh(&pfr->reflector_dev->xmit_lock);
+ pfr->reflector_dev->xmit_lock_owner = cpu;
+ spin_unlock_bh(&pfr->reflector_dev->xmit_lock);
+
+ if (pfr->reflector_dev->hard_start_xmit(skb,
+ pfr->reflector_dev) == 0) {
+ spin_lock_bh(&pfr->reflector_dev->xmit_lock);
+ pfr->reflector_dev->xmit_lock_owner = -1;
+ skb->data += displ;
+ spin_unlock_bh(&pfr->reflector_dev->xmit_lock);
+#if defined(RING_DEBUG)
+ printk("++ hard_start_xmit succeeded\n");
+#endif
+ return; /* OK */
+ }
+
+ spin_lock_bh(&pfr->reflector_dev->xmit_lock);
+ pfr->reflector_dev->xmit_lock_owner = -1;
+ spin_unlock_bh(&pfr->reflector_dev->xmit_lock);
+ }
+
+#if defined(RING_DEBUG)
+ printk("++ hard_start_xmit failed\n");
+#endif
+ skb->data += displ;
+ return; /* -ENETDOWN */
+ }
+
+ /* ************************************* */
+
+#if defined(RING_DEBUG)
+ printk("add_skb_to_ring(skb) [len=%d][tot=%llu][insertIdx=%d]"
+ "[pkt_type=%d][cloned=%d]\n",
+ (int)skb->len, pfr->slots_info->tot_pkts,
+ pfr->slots_info->insert_idx,
+ skb->pkt_type, skb->cloned);
+#endif
+
+ idx = pfr->slots_info->insert_idx;
+ theSlot = get_insert_slot(pfr);
+
+ if((theSlot != NULL) && (theSlot->slot_state == 0)) {
+ struct pcap_pkthdr *hdr;
+ unsigned int bucketSpace;
+ char *bucket;
+
+ /* Update Index */
+ idx++;
+
+ if(idx == pfr->slots_info->tot_slots) {
+ write_lock(&pfr->ring_index_lock);
+ pfr->slots_info->insert_idx = 0;
+ write_unlock(&pfr->ring_index_lock);
+ } else {
+ write_lock(&pfr->ring_index_lock);
+ pfr->slots_info->insert_idx = idx;
+ write_unlock(&pfr->ring_index_lock);
+ }
+
+ bucketSpace = pfr->slots_info->slot_len
+#ifdef RING_MAGIC
+ - sizeof(u_char)
+#endif
+ - sizeof(u_char) /* flowSlot.slot_state */
+ - sizeof(struct pcap_pkthdr)
+ - 1 /* 10 */ /* safe boundary */;
+
+ bucket = &theSlot->bucket;
+ hdr = (struct pcap_pkthdr*)bucket;
+
+ if(skb->stamp.tv_sec == 0) do_gettimeofday(&skb->stamp);
+
+ hdr->ts.tv_sec = skb->stamp.tv_sec, hdr->ts.tv_usec = skb->stamp.tv_usec;
+ hdr->caplen = skb->len+displ;
+
+ if(hdr->caplen > bucketSpace)
+ hdr->caplen = bucketSpace;
+
+ hdr->len = skb->len+displ;
+ memcpy(&bucket[sizeof(struct pcap_pkthdr)],
+ skb->data-displ, hdr->caplen);
+
+#if defined(RING_DEBUG)
+ {
+ static unsigned int lastLoss = 0;
+
+ if(pfr->slots_info->tot_lost
+ && (lastLoss != pfr->slots_info->tot_lost)) {
+ printk("add_skb_to_ring(%d): [bucketSpace=%d]"
+ "[hdr.caplen=%d][skb->len=%d]"
+ "[pcap_pkthdr=%d][removeIdx=%d]"
+ "[loss=%lu][page=%u][slot=%u]\n",
+ idx-1, bucketSpace, hdr->caplen, skb->len,
+ sizeof(struct pcap_pkthdr),
+ pfr->slots_info->remove_idx,
+ (long unsigned int)pfr->slots_info->tot_lost,
+ pfr->insert_page_id, pfr->insert_slot_id);
+
+ lastLoss = pfr->slots_info->tot_lost;
+ }
+ }
+#endif
+
+ write_lock(&pfr->ring_index_lock);
+ pfr->slots_info->tot_insert++;
+ theSlot->slot_state = 1;
+ write_unlock(&pfr->ring_index_lock);
+ } else {
+ write_lock(&pfr->ring_index_lock);
+ pfr->slots_info->tot_lost++;
+ write_unlock(&pfr->ring_index_lock);
+
+#if defined(RING_DEBUG)
+ printk("add_skb_to_ring(skb): packet lost [loss=%lu]"
+ "[removeIdx=%u][insertIdx=%u]\n",
+ (long unsigned int)pfr->slots_info->tot_lost,
+ pfr->slots_info->remove_idx, pfr->slots_info->insert_idx);
+#endif
+ }
+
+ /* wakeup in case of poll() */
+ if(waitqueue_active(&pfr->ring_slots_waitqueue))
+ wake_up_interruptible(&pfr->ring_slots_waitqueue);
+}
+
+/* ********************************** */
+
+static u_int hash_skb(struct ring_cluster *cluster_ptr,
+ struct sk_buff *skb, u_char recv_packet) {
+ u_int idx;
+ int displ;
+ struct iphdr *ip;
+
+ if(cluster_ptr->hashing_mode == cluster_round_robin) {
+ idx = cluster_ptr->hashing_id++;
+ } else {
+ /* Per-flow clustering */
+ if(skb->len > sizeof(struct iphdr)+sizeof(struct tcphdr)) {
+ if(recv_packet)
+ displ = 0;
+ else
+ displ = SKB_DISPLACEMENT;
+
+ /*
+ skb->data+displ
+
+ Always points to to the IP part of the packet
+ */
+
+ ip = (struct iphdr*)(skb->data+displ);
+
+ idx = ip->saddr+ip->daddr+ip->protocol;
+
+ if(ip->protocol == IPPROTO_TCP) {
+ struct tcphdr *tcp = (struct tcphdr*)(skb->data+displ
+ +sizeof(struct iphdr));
+ idx += tcp->source+tcp->dest;
+ } else if(ip->protocol == IPPROTO_UDP) {
+ struct udphdr *udp = (struct udphdr*)(skb->data+displ
+ +sizeof(struct iphdr));
+ idx += udp->source+udp->dest;
+ }
+ } else
+ idx = skb->len;
+ }
+
+ return(idx % cluster_ptr->num_cluster_elements);
+}
+
+/* ********************************** */
+
+static int skb_ring_handler(struct sk_buff *skb,
+ u_char recv_packet,
+ u_char real_skb /* 1=skb 0=faked skb */) {
+ struct sock *skElement;
+ int rc = 0;
+ struct list_head *ptr;
+ struct ring_cluster *cluster_ptr;
+
+#ifdef PROFILING
+ uint64_t rdt = _rdtsc(), rdt1, rdt2;
+#endif
+
+ if((!skb) /* Invalid skb */
+ || ((!enable_tx_capture) && (!recv_packet))) {
+ /*
+ An outgoing packet is about to be sent out
+ but we decided not to handle transmitted
+ packets.
+ */
+ return(0);
+ }
+
+#if defined(RING_DEBUG)
+ if(0) {
+ printk("skb_ring_handler() [len=%d][dev=%s]\n", skb->len,
+ skb->dev->name == NULL ? "<NULL>" : skb->dev->name);
+ }
+#endif
+
+#ifdef PROFILING
+ rdt1 = _rdtsc();
+#endif
+
+ /* [1] Check unclustered sockets */
+ for (ptr = ring_table.next; ptr != &ring_table; ptr = ptr->next) {
+ struct ring_opt *pfr;
+ struct ring_element *entry;
+
+ entry = list_entry(ptr, struct ring_element, list);
+
+ read_lock(&ring_mgmt_lock);
+ skElement = entry->sk;
+ pfr = ring_sk(skElement);
+ read_unlock(&ring_mgmt_lock);
+
+ if((pfr != NULL)
+ && (pfr->cluster_id == 0 /* No cluster */)
+ && (pfr->ring_slots != NULL)
+ && (pfr->ring_netdev == skb->dev)) {
+ /* We've found the ring where the packet can be stored */
+ read_lock(&ring_mgmt_lock);
+ add_skb_to_ring(skb, pfr, recv_packet, real_skb);
+ read_unlock(&ring_mgmt_lock);
+
+ rc = 1; /* Ring found: we've done our job */
+ }
+ }
+
+ /* [2] Check socket clusters */
+ cluster_ptr = ring_cluster_list;
+
+ while(cluster_ptr != NULL) {
+ struct ring_opt *pfr;
+
+ if(cluster_ptr->num_cluster_elements > 0) {
+ u_int skb_hash = hash_skb(cluster_ptr, skb, recv_packet);
+
+ read_lock(&ring_mgmt_lock);
+ skElement = cluster_ptr->sk[skb_hash];
+ read_unlock(&ring_mgmt_lock);
+
+ if(skElement != NULL) {
+ pfr = ring_sk(skElement);
+
+ if((pfr != NULL)
+ && (pfr->ring_slots != NULL)
+ && (pfr->ring_netdev == skb->dev)) {
+ /* We've found the ring where the packet can be stored */
+ read_lock(&ring_mgmt_lock);
+ add_skb_to_ring(skb, pfr, recv_packet, real_skb);
+ read_unlock(&ring_mgmt_lock);
+
+ rc = 1; /* Ring found: we've done our job */
+ }
+ }
+ }
+
+ cluster_ptr = cluster_ptr->next;
+ }
+
+#ifdef PROFILING
+ rdt1 = _rdtsc()-rdt1;
+#endif
+
+#ifdef PROFILING
+ rdt2 = _rdtsc();
+#endif
+
+ if(transparent_mode) rc = 0;
+
+ if((rc != 0) && real_skb)
+ dev_kfree_skb(skb); /* Free the skb */
+
+#ifdef PROFILING
+ rdt2 = _rdtsc()-rdt2;
+ rdt = _rdtsc()-rdt;
+
+#if defined(RING_DEBUG)
+ printk("# cycles: %d [lock costed %d %d%%][free costed %d %d%%]\n",
+ (int)rdt, rdt-rdt1,
+ (int)((float)((rdt-rdt1)*100)/(float)rdt),
+ rdt2,
+ (int)((float)(rdt2*100)/(float)rdt));
+#endif
+#endif
+
+ return(rc); /* 0 = packet not handled */
+}
+
+/* ********************************** */
+
+struct sk_buff skb;
+
+static int buffer_ring_handler(struct net_device *dev,
+ char *data, int len) {
+
+#if defined(RING_DEBUG)
+ printk("buffer_ring_handler: [dev=%s][len=%d]\n",
+ dev->name == NULL ? "<NULL>" : dev->name, len);
+#endif
+
+ skb.dev = dev, skb.len = len, skb.data = data,
+ skb.data_len = len, skb.stamp.tv_sec = 0; /* Calculate the time */
+
+ skb_ring_handler(&skb, 1, 0 /* fake skb */);
+
+ return(0);
+}
+
+/* ********************************** */
+
+static int ring_create(struct socket *sock, int protocol) {
+ struct sock *sk;
+ struct ring_opt *pfr;
+ int err;
+
+#if defined(RING_DEBUG)
+ printk("RING: ring_create()\n");
+#endif
+
+ /* Are you root, superuser or so ? */
+ if(!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ if(sock->type != SOCK_RAW)
+ return -ESOCKTNOSUPPORT;
+
+ if(protocol != htons(ETH_P_ALL))
+ return -EPROTONOSUPPORT;
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0))
+ MOD_INC_USE_COUNT;
+#endif
+
+ err = -ENOMEM;
+
+ // BD: -- broke this out to keep it more simple and clear as to what the
+ // options are.
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
+#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,11))
+ sk = sk_alloc(PF_RING, GFP_KERNEL, 1, NULL);
+#endif
+#endif
+
+ // BD: API changed in 2.6.12, ref:
+ // http://svn.clkao.org/svnweb/linux/revision/?rev=28201
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,11))
+ sk = sk_alloc(PF_RING, GFP_ATOMIC, &ring_proto, 1);
+#endif
+
+ if (sk == NULL)
+ goto out;
+
+ sock->ops = &ring_ops;
+ sock_init_data(sock, sk);
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
+#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,11))
+ sk_set_owner(sk, THIS_MODULE);
+#endif
+#endif
+
+ err = -ENOMEM;
+ ring_sk(sk) = ring_sk_datatype(kmalloc(sizeof(*pfr), GFP_KERNEL));
+
+ if (!(pfr = ring_sk(sk))) {
+ sk_free(sk);
+ goto out;
+ }
+ memset(pfr, 0, sizeof(*pfr));
+ init_waitqueue_head(&pfr->ring_slots_waitqueue);
+ pfr->ring_index_lock = RW_LOCK_UNLOCKED;
+ atomic_set(&pfr->num_ring_slots_waiters, 0);
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
+ sk->sk_family = PF_RING;
+ sk->sk_destruct = ring_sock_destruct;
+#else
+ sk->family = PF_RING;
+ sk->destruct = ring_sock_destruct;
+ sk->num = protocol;
+#endif
+
+ ring_insert(sk);
+
+#if defined(RING_DEBUG)
+ printk("RING: ring_create() - created\n");
+#endif
+
+ return(0);
+ out:
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0))
+ MOD_DEC_USE_COUNT;
+#endif
+ return err;
+}
+
+/* *********************************************** */
+
+static int ring_release(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+ struct ring_opt *pfr = ring_sk(sk);
+
+ if(!sk)
+ return 0;
+
+#if defined(RING_DEBUG)
+ printk("RING: called ring_release\n");
+#endif
+
+#if defined(RING_DEBUG)
+ printk("RING: ring_release entered\n");
+#endif
+
+ ring_remove(sk);
+
+ sock_orphan(sk);
+ sock->sk = NULL;
+
+ /* Free the ring buffer */
+ if(pfr->ring_memory) {
+ struct page *page, *page_end;
+
+ page_end = virt_to_page(pfr->ring_memory + (PAGE_SIZE << pfr->order) - 1);
+ for(page = virt_to_page(pfr->ring_memory); page <= page_end; page++)
+ ClearPageReserved(page);
+
+ free_pages(pfr->ring_memory, pfr->order);
+ }
+
+ kfree(pfr);
+ ring_sk(sk) = NULL;
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
+ skb_queue_purge(&sk->sk_write_queue);
+#endif
+ sock_put(sk);
+
+#if defined(RING_DEBUG)
+ printk("RING: ring_release leaving\n");
+#endif
+
+ return 0;
+}
+
+/* ********************************** */
+/*
+ * We create a ring for this socket and bind it to the specified device
+ */
+static int packet_ring_bind(struct sock *sk, struct net_device *dev)
+{
+ u_int the_slot_len;
+ u_int32_t tot_mem;
+ struct ring_opt *pfr = ring_sk(sk);
+ struct page *page, *page_end;
+
+ if(!dev) return(-1);
+
+#if defined(RING_DEBUG)
+ printk("RING: packet_ring_bind(%s) called\n", dev->name);
+#endif
+
+ /* **********************************************
+
+ *************************************
+ * *
+ * FlowSlotInfo *
+ * *
+ ************************************* <-+
+ * FlowSlot * |
+ ************************************* |
+ * FlowSlot * |
+ ************************************* +- num_slots
+ * FlowSlot * |
+ ************************************* |
+ * FlowSlot * |
+ ************************************* <-+
+
+ ********************************************** */
+
+ the_slot_len = sizeof(u_char) /* flowSlot.slot_state */
+ + sizeof(u_short) /* flowSlot.slot_len */
+ + bucket_len /* flowSlot.bucket */;
+
+ tot_mem = sizeof(FlowSlotInfo) + num_slots*the_slot_len;
+
+ /*
+ Calculate the value of the order parameter used later.
+ See http://www.linuxjournal.com/article.php?sid=1133
+ */
+ for(pfr->order = 0;(PAGE_SIZE << pfr->order) < tot_mem; pfr->order++) ;
+
+ /*
+ We now try to allocate the memory as required. If we fail
+ we try to allocate a smaller amount or memory (hence a
+ smaller ring).
+ */
+ while((pfr->ring_memory = __get_free_pages(GFP_ATOMIC, pfr->order)) == 0)
+ if(pfr->order-- == 0)
+ break;
+
+ if(pfr->order == 0) {
+#if defined(RING_DEBUG)
+ printk("ERROR: not enough memory\n");
+#endif
+ return(-1);
+ } else {
+#if defined(RING_DEBUG)
+ printk("RING: succesfully allocated %lu KB [tot_mem=%d][order=%ld]\n",
+ PAGE_SIZE >> (10 - pfr->order), tot_mem, pfr->order);
+#endif
+ }
+
+ tot_mem = PAGE_SIZE << pfr->order;
+ memset((char*)pfr->ring_memory, 0, tot_mem);
+
+ /* Now we need to reserve the pages */
+ page_end = virt_to_page(pfr->ring_memory + (PAGE_SIZE << pfr->order) - 1);
+ for(page = virt_to_page(pfr->ring_memory); page <= page_end; page++)
+ SetPageReserved(page);
+
+ pfr->slots_info = (FlowSlotInfo*)pfr->ring_memory;
+ pfr->ring_slots = (char*)(pfr->ring_memory+sizeof(FlowSlotInfo));
+
+ pfr->slots_info->version = RING_FLOWSLOT_VERSION;
+ pfr->slots_info->slot_len = the_slot_len;
+ pfr->slots_info->tot_slots = (tot_mem-sizeof(FlowSlotInfo))/the_slot_len;
+ pfr->slots_info->tot_mem = tot_mem;
+ pfr->slots_info->sample_rate = sample_rate;
+
+#if defined(RING_DEBUG)
+ printk("RING: allocated %d slots [slot_len=%d][tot_mem=%u]\n",
+ pfr->slots_info->tot_slots, pfr->slots_info->slot_len,
+ pfr->slots_info->tot_mem);
+#endif
+
+#ifdef RING_MAGIC
+ {
+ int i;
+
+ for(i=0; i<pfr->slots_info->tot_slots; i++) {
+ unsigned long idx = i*pfr->slots_info->slot_len;
+ FlowSlot *slot = (FlowSlot*)&pfr->ring_slots[idx];
+ slot->magic = RING_MAGIC_VALUE; slot->slot_state = 0;
+ }
+ }
+#endif
+
+ pfr->insert_page_id = 1, pfr->insert_slot_id = 0;
+
+ /*
+ IMPORTANT
+ Leave this statement here as last one. In fact when
+ the ring_netdev != NULL the socket is ready to be used.
+ */
+ pfr->ring_netdev = dev;
+
+ return(0);
+}
+
+/* ************************************* */
+
+/* Bind to a device */
+static int ring_bind(struct socket *sock,
+ struct sockaddr *sa, int addr_len)
+{
+ struct sock *sk=sock->sk;
+ struct net_device *dev = NULL;
+
+#if defined(RING_DEBUG)
+ printk("RING: ring_bind() called\n");
+#endif
+
+ /*
+ * Check legality
+ */
+ if (addr_len != sizeof(struct sockaddr))
+ return -EINVAL;
+ if (sa->sa_family != PF_RING)
+ return -EINVAL;
+
+ /* Safety check: add trailing zero if missing */
+ sa->sa_data[sizeof(sa->sa_data)-1] = '\0';
+
+#if defined(RING_DEBUG)
+ printk("RING: searching device %s\n", sa->sa_data);
+#endif
+
+ if((dev = __dev_get_by_name(sa->sa_data)) == NULL) {
+#if defined(RING_DEBUG)
+ printk("RING: search failed\n");
+#endif
+ return(-EINVAL);
+ } else
+ return(packet_ring_bind(sk, dev));
+}
+
+/* ************************************* */
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
+
+volatile void* virt_to_kseg(volatile void* address) {
+ pte_t *pte;
+ pud_t *pud;
+ unsigned long addr = (unsigned long)address;
+
+ pud = pud_offset(pgd_offset_k((unsigned long) address),
+ (unsigned long) address);
+
+ /*
+ High-memory support courtesy of
+ Brad Doctor <bdoctor@ps-ax.com>
+ */
+#if defined(CONFIG_X86_PAE) && (!defined(CONFIG_NOHIGHMEM))
+ pte = pte_offset_map(pmd_offset(pud, addr), addr);
+#else
+ pte = pmd_offset_map(pud, addr);
+#endif
+
+ return((volatile void*)pte_page(*pte));
+}
+
+#else /* 2.4 */
+
+/* http://www.scs.ch/~frey/linux/memorymap.html */
+volatile void *virt_to_kseg(volatile void *address)
+{
+ pgd_t *pgd; pmd_t *pmd; pte_t *ptep, pte;
+ unsigned long va, ret = 0UL;
+
+ va=VMALLOC_VMADDR((unsigned long)address);
+
+ /* get the page directory. Use the kernel memory map. */
+ pgd = pgd_offset_k(va);
+
+ /* check whether we found an entry */
+ if (!pgd_none(*pgd))
+ {
+ /* get the page middle directory */
+ pmd = pmd_offset(pgd, va);
+ /* check whether we found an entry */
+ if (!pmd_none(*pmd))
+ {
+ /* get a pointer to the page table entry */
+ ptep = pte_offset(pmd, va);
+ pte = *ptep;
+ /* check for a valid page */
+ if (pte_present(pte))
+ {
+ /* get the address the page is refering to */
+ ret = (unsigned long)page_address(pte_page(pte));
+ /* add the offset within the page to the page address */
+ ret |= (va & (PAGE_SIZE -1));
+ }
+ }
+ }
+ return((volatile void *)ret);
+}
+#endif
+
+/* ************************************* */
+
+static int ring_mmap(struct file *file,
+ struct socket *sock,
+ struct vm_area_struct *vma)
+{
+ struct sock *sk = sock->sk;
+ struct ring_opt *pfr = ring_sk(sk);
+ unsigned long size, start;
+ u_int pagesToMap;
+ char *ptr;
+
+#if defined(RING_DEBUG)
+ printk("RING: ring_mmap() called\n");
+#endif
+
+ if(pfr->ring_memory == 0) {
+#if defined(RING_DEBUG)
+ printk("RING: ring_mmap() failed: mapping area to an unbound socket\n");
+#endif
+ return -EINVAL;
+ }
+
+ size = (unsigned long)(vma->vm_end-vma->vm_start);
+
+ if(size % PAGE_SIZE) {
+#if defined(RING_DEBUG)
+ printk("RING: ring_mmap() failed: len is not multiple of PAGE_SIZE\n");
+#endif
+ return(-EINVAL);
+ }
+
+ /* if userspace tries to mmap beyond end of our buffer, fail */
+ if(size > pfr->slots_info->tot_mem) {
+#if defined(RING_DEBUG)
+ printk("proc_mmap() failed: area too large [%ld > %d]\n", size, pfr->slots_info->tot_mem);
+#endif
+ return(-EINVAL);
+ }
+
+ pagesToMap = size/PAGE_SIZE;
+
+#if defined(RING_DEBUG)
+ printk("RING: ring_mmap() called. %d pages to map\n", pagesToMap);
+#endif
+
+#if defined(RING_DEBUG)
+ printk("RING: mmap [slot_len=%d][tot_slots=%d] for ring on device %s\n",
+ pfr->slots_info->slot_len, pfr->slots_info->tot_slots,
+ pfr->ring_netdev->name);
+#endif
+
+ /* we do not want to have this area swapped out, lock it */
+ vma->vm_flags |= VM_LOCKED;
+ start = vma->vm_start;
+
+ /* Ring slots start from page 1 (page 0 is reserved for FlowSlotInfo) */
+ ptr = (char*)(start+PAGE_SIZE);
+
+ if(remap_page_range(
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
+ vma,
+#endif
+ start,
+ __pa(pfr->ring_memory),
+ PAGE_SIZE*pagesToMap, vma->vm_page_prot)) {
+#if defined(RING_DEBUG)
+ printk("remap_page_range() failed\n");
+#endif
+ return(-EAGAIN);
+ }
+
+#if defined(RING_DEBUG)
+ printk("proc_mmap(pagesToMap=%d): success.\n", pagesToMap);
+#endif
+
+ return 0;
+}
+
+/* ************************************* */
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
+static int ring_recvmsg(struct kiocb *iocb, struct socket *sock,
+ struct msghdr *msg, size_t len, int flags)
+#else
+ static int ring_recvmsg(struct socket *sock, struct msghdr *msg, int len,
+ int flags, struct scm_cookie *scm)
+#endif
+{
+ FlowSlot* slot;
+ struct ring_opt *pfr = ring_sk(sock->sk);
+ u_int32_t queued_pkts, num_loops = 0;
+
+#if defined(RING_DEBUG)
+ printk("ring_recvmsg called\n");
+#endif
+
+ slot = get_remove_slot(pfr);
+
+ while((queued_pkts = num_queued_pkts(pfr)) < MIN_QUEUED_PKTS) {
+ wait_event_interruptible(pfr->ring_slots_waitqueue, 1);
+
+#if defined(RING_DEBUG)
+ printk("-> ring_recvmsg returning %d [queued_pkts=%d][num_loops=%d]\n",
+ slot->slot_state, queued_pkts, num_loops);
+#endif
+
+ if(queued_pkts > 0) {
+ if(num_loops++ > MAX_QUEUE_LOOPS)
+ break;
+ }
+ }
+
+#if defined(RING_DEBUG)
+ if(slot != NULL)
+ printk("ring_recvmsg is returning [queued_pkts=%d][num_loops=%d]\n",
+ queued_pkts, num_loops);
+#endif
+
+ return(queued_pkts);
+}
+
+/* ************************************* */
+
+unsigned int ring_poll(struct file * file,
+ struct socket *sock, poll_table *wait)
+{
+ FlowSlot* slot;
+ struct ring_opt *pfr = ring_sk(sock->sk);
+
+#if defined(RING_DEBUG)
+ printk("poll called\n");
+#endif
+
+ slot = get_remove_slot(pfr);
+
+ if((slot != NULL) && (slot->slot_state == 0))
+ poll_wait(file, &pfr->ring_slots_waitqueue, wait);
+
+#if defined(RING_DEBUG)
+ printk("poll returning %d\n", slot->slot_state);
+#endif
+
+ if((slot != NULL) && (slot->slot_state == 1))
+ return(POLLIN | POLLRDNORM);
+ else
+ return(0);
+}
+
+/* ************************************* */
+
+int add_to_cluster_list(struct ring_cluster *el,
+ struct sock *sock) {
+
+ if(el->num_cluster_elements == CLUSTER_LEN)
+ return(-1); /* Cluster full */
+
+ ring_sk_datatype(ring_sk(sock))->cluster_id = el->cluster_id;
+ el->sk[el->num_cluster_elements] = sock;
+ el->num_cluster_elements++;
+ return(0);
+}
+
+/* ************************************* */
+
+int remove_from_cluster_list(struct ring_cluster *el,
+ struct sock *sock) {
+ int i, j;
+
+ for(i=0; i<CLUSTER_LEN; i++)
+ if(el->sk[i] == sock) {
+ el->num_cluster_elements--;
+
+ if(el->num_cluster_elements > 0) {
+ /* The cluster contains other elements */
+ for(j=i; j<CLUSTER_LEN-1; j++)
+ el->sk[j] = el->sk[j+1];
+
+ el->sk[CLUSTER_LEN-1] = NULL;
+ } else {
+ /* Empty cluster */
+ memset(el->sk, 0, sizeof(el->sk));
+ }
+
+ return(0);
+ }
+
+ return(-1); /* Not found */
+}
+
+/* ************************************* */
+
+static int remove_from_cluster(struct sock *sock,
+ struct ring_opt *pfr)
+{
+ struct ring_cluster *el;
+
+#if defined(RING_DEBUG)
+ printk("--> remove_from_cluster(%d)\n", pfr->cluster_id);
+#endif
+
+ if(pfr->cluster_id == 0 /* 0 = No Cluster */)
+ return(0); /* Noting to do */
+
+ el = ring_cluster_list;
+
+ while(el != NULL) {
+ if(el->cluster_id == pfr->cluster_id) {
+ return(remove_from_cluster_list(el, sock));
+ } else
+ el = el->next;
+ }
+
+ return(-EINVAL); /* Not found */
+}
+
+/* ************************************* */
+
+static int add_to_cluster(struct sock *sock,
+ struct ring_opt *pfr,
+ u_short cluster_id)
+{
+ struct ring_cluster *el;
+
+#ifndef RING_DEBUG
+ printk("--> add_to_cluster(%d)\n", cluster_id);
+#endif
+
+ if(cluster_id == 0 /* 0 = No Cluster */) return(-EINVAL);
+
+ if(pfr->cluster_id != 0)
+ remove_from_cluster(sock, pfr);
+
+ el = ring_cluster_list;
+
+ while(el != NULL) {
+ if(el->cluster_id == cluster_id) {
+ return(add_to_cluster_list(el, sock));
+ } else
+ el = el->next;
+ }
+
+ /* There's no existing cluster. We need to create one */
+ if((el = kmalloc(sizeof(struct ring_cluster), GFP_KERNEL)) == NULL)
+ return(-ENOMEM);
+
+ el->cluster_id = cluster_id;
+ el->num_cluster_elements = 1;
+ el->hashing_mode = cluster_per_flow; /* Default */
+ el->hashing_id = 0;
+
+ memset(el->sk, 0, sizeof(el->sk));
+ el->sk[0] = sock;
+ el->next = ring_cluster_list;
+ ring_cluster_list = el;
+ pfr->cluster_id = cluster_id;
+
+ return(0); /* 0 = OK */
+}
+
+/* ************************************* */
+
+/* Code taken/inspired from core/sock.c */
+static int ring_setsockopt(struct socket *sock,
+ int level, int optname,
+ char *optval, int optlen)
+{
+ struct ring_opt *pfr = ring_sk(sock->sk);
+ int val, found, ret = 0;
+ u_int cluster_id;
+ char devName[8];
+
+ if((optlen<sizeof(int)) || (pfr == NULL))
+ return(-EINVAL);
+
+ if (get_user(val, (int *)optval))
+ return -EFAULT;
+
+ found = 1;
+
+ switch(optname)
+ {
+ case SO_ATTACH_FILTER:
+ ret = -EINVAL;
+ if (optlen == sizeof(struct sock_fprog)) {
+ unsigned int fsize;
+ struct sock_fprog fprog;
+ struct sk_filter *filter;
+
+ ret = -EFAULT;
+
+ /*
+ NOTE
+
+ Do not call copy_from_user within a held
+ splinlock (e.g. ring_mgmt_lock) as this caused
+ problems when certain debugging was enabled under
+ 2.6.5 -- including hard lockups of the machine.
+ */
+ if(copy_from_user(&fprog, optval, sizeof(fprog)))
+ break;
+
+ fsize = sizeof(struct sock_filter) * fprog.len;
+ filter = kmalloc(fsize, GFP_KERNEL);
+
+ if(filter == NULL) {
+ ret = -ENOMEM;
+ break;
+ }
+
+ if(copy_from_user(filter->insns, fprog.filter, fsize))
+ break;
+
+ filter->len = fprog.len;
+
+ if(sk_chk_filter(filter->insns, filter->len) != 0) {
+ /* Bad filter specified */
+ kfree(filter);
+ pfr->bpfFilter = NULL;
+ break;
+ }
+
+ /* get the lock, set the filter, release the lock */
+ write_lock(&ring_mgmt_lock);
+ pfr->bpfFilter = filter;
+ write_unlock(&ring_mgmt_lock);
+ }
+ ret = 0;
+ break;
+
+ case SO_DETACH_FILTER:
+ write_lock(&ring_mgmt_lock);
+ found = 1;
+ if(pfr->bpfFilter != NULL) {
+ kfree(pfr->bpfFilter);
+ pfr->bpfFilter = NULL;
+ write_unlock(&ring_mgmt_lock);
+ break;
+ }
+ ret = -ENONET;
+ break;
+
+ case SO_ADD_TO_CLUSTER:
+ if (optlen!=sizeof(val))
+ return -EINVAL;
+
+ if (copy_from_user(&cluster_id, optval, sizeof(cluster_id)))
+ return -EFAULT;
+
+ write_lock(&ring_mgmt_lock);
+ ret = add_to_cluster(sock->sk, pfr, cluster_id);
+ write_unlock(&ring_mgmt_lock);
+ break;
+
+ case SO_REMOVE_FROM_CLUSTER:
+ write_lock(&ring_mgmt_lock);
+ ret = remove_from_cluster(sock->sk, pfr);
+ write_unlock(&ring_mgmt_lock);
+ break;
+
+ case SO_SET_REFLECTOR:
+ if(optlen >= (sizeof(devName)-1))
+ return -EINVAL;
+
+ if(optlen > 0) {
+ if(copy_from_user(devName, optval, optlen))
+ return -EFAULT;
+ }
+
+ devName[optlen] = '\0';
+
+#if defined(RING_DEBUG)
+ printk("+++ SO_SET_REFLECTOR(%s)\n", devName);
+#endif
+
+ write_lock(&ring_mgmt_lock);
+ pfr->reflector_dev = dev_get_by_name(devName);
+ write_unlock(&ring_mgmt_lock);
+
+#if defined(RING_DEBUG)
+ if(pfr->reflector_dev != NULL)
+ printk("SO_SET_REFLECTOR(%s): succeded\n", devName);
+ else
+ printk("SO_SET_REFLECTOR(%s): device unknown\n", devName);
+#endif
+ break;
+
+ default:
+ found = 0;
+ break;
+ }
+
+ if(found)
+ return(ret);
+ else
+ return(sock_setsockopt(sock, level, optname, optval, optlen));
+}
+
+/* ************************************* */
+
+static int ring_ioctl(struct socket *sock,
+ unsigned int cmd, unsigned long arg)
+{
+ switch(cmd)
+ {
+ case SIOCGIFFLAGS:
+ case SIOCSIFFLAGS:
+ case SIOCGIFCONF:
+ case SIOCGIFMETRIC:
+ case SIOCSIFMETRIC:
+ case SIOCGIFMEM:
+ case SIOCSIFMEM:
+ case SIOCGIFMTU:
+ case SIOCSIFMTU:
+ case SIOCSIFLINK:
+ case SIOCGIFHWADDR:
+ case SIOCSIFHWADDR:
+ case SIOCSIFMAP:
+ case SIOCGIFMAP:
+ case SIOCSIFSLAVE:
+ case SIOCGIFSLAVE:
+ case SIOCGIFINDEX:
+ case SIOCGIFNAME:
+ case SIOCGIFCOUNT:
+ case SIOCSIFHWBROADCAST:
+ return(dev_ioctl(cmd,(void *) arg));
+
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+/* ************************************* */
+
+static struct proto_ops ring_ops = {
+ .family = PF_RING,
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
+ .owner = THIS_MODULE,
+#endif
+
+ /* Operations that make no sense on ring sockets. */
+ .connect = sock_no_connect,
+ .socketpair = sock_no_socketpair,
+ .accept = sock_no_accept,
+ .getname = sock_no_getname,
+ .listen = sock_no_listen,
+ .shutdown = sock_no_shutdown,
+ .sendpage = sock_no_sendpage,
+ .sendmsg = sock_no_sendmsg,
+ .getsockopt = sock_no_getsockopt,
+
+ /* Now the operations that really occur. */
+ .release = ring_release,
+ .bind = ring_bind,
+ .mmap = ring_mmap,
+ .poll = ring_poll,
+ .setsockopt = ring_setsockopt,
+ .ioctl = ring_ioctl,
+ .recvmsg = ring_recvmsg,
+};
+
+/* ************************************ */
+
+static struct net_proto_family ring_family_ops = {
+ .family = PF_RING,
+ .create = ring_create,
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
+ .owner = THIS_MODULE,
+#endif
+};
+
+// BD: API changed in 2.6.12, ref:
+// http://svn.clkao.org/svnweb/linux/revision/?rev=28201
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,11))
+static struct proto ring_proto = {
+ .name = "PF_RING",
+ .owner = THIS_MODULE,
+ .obj_size = sizeof(struct sock),
+};
+#endif
+
+/* ************************************ */
+
+static void __exit ring_exit(void)
+{
+ struct list_head *ptr;
+ struct ring_element *entry;
+
+ for(ptr = ring_table.next; ptr != &ring_table; ptr = ptr->next) {
+ entry = list_entry(ptr, struct ring_element, list);
+ kfree(entry);
+ }
+
+ while(ring_cluster_list != NULL) {
+ struct ring_cluster *next = ring_cluster_list->next;
+ kfree(ring_cluster_list);
+ ring_cluster_list = next;
+ }
+
+ set_skb_ring_handler(NULL);
+ set_buffer_ring_handler(NULL);
+ sock_unregister(PF_RING);
+
+ printk("PF_RING shut down.\n");
+}
+
+/* ************************************ */
+
+static int __init ring_init(void)
+{
+ printk("Welcome to PF_RING %s\n(C) 2004 L.Deri <deri@ntop.org>\n",
+ RING_VERSION);
+
+ INIT_LIST_HEAD(&ring_table);
+ ring_cluster_list = NULL;
+
+ sock_register(&ring_family_ops);
+
+ set_skb_ring_handler(skb_ring_handler);
+ set_buffer_ring_handler(buffer_ring_handler);
+
+ if(get_buffer_ring_handler() != buffer_ring_handler) {
+ printk("PF_RING: set_buffer_ring_handler FAILED\n");
+
+ set_skb_ring_handler(NULL);
+ set_buffer_ring_handler(NULL);
+ sock_unregister(PF_RING);
+ return -1;
+ } else {
+ printk("PF_RING: bucket length %d bytes\n", bucket_len);
+ printk("PF_RING: ring slots %d\n", num_slots);
+ printk("PF_RING: sample rate %d [1=no sampling]\n", sample_rate);
+ printk("PF_RING: capture TX %s\n",
+ enable_tx_capture ? "Yes [RX+TX]" : "No [RX only]");
+ printk("PF_RING: transparent mode %s\n",
+ transparent_mode ? "Yes" : "No");
+
+ printk("PF_RING initialized correctly.\n");
+ return 0;
+ }
+}
+
+module_init(ring_init);
+module_exit(ring_exit);
+MODULE_LICENSE("GPL");
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
+MODULE_ALIAS_NETPROTO(PF_RING);
+#endif
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