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![Linus Torvalds](/assets/img/avatar_default.png)
Pull networking updates from David Miller: 1) Significantly shrink the core networking routing structures. Result of http://vger.kernel.org/~davem/seoul2017_netdev_keynote.pdf 2) Add netdevsim driver for testing various offloads, from Jakub Kicinski. 3) Support cross-chip FDB operations in DSA, from Vivien Didelot. 4) Add a 2nd listener hash table for TCP, similar to what was done for UDP. From Martin KaFai Lau. 5) Add eBPF based queue selection to tun, from Jason Wang. 6) Lockless qdisc support, from John Fastabend. 7) SCTP stream interleave support, from Xin Long. 8) Smoother TCP receive autotuning, from Eric Dumazet. 9) Lots of erspan tunneling enhancements, from William Tu. 10) Add true function call support to BPF, from Alexei Starovoitov. 11) Add explicit support for GRO HW offloading, from Michael Chan. 12) Support extack generation in more netlink subsystems. From Alexander Aring, Quentin Monnet, and Jakub Kicinski. 13) Add 1000BaseX, flow control, and EEE support to mvneta driver. From Russell King. 14) Add flow table abstraction to netfilter, from Pablo Neira Ayuso. 15) Many improvements and simplifications to the NFP driver bpf JIT, from Jakub Kicinski. 16) Support for ipv6 non-equal cost multipath routing, from Ido Schimmel. 17) Add resource abstration to devlink, from Arkadi Sharshevsky. 18) Packet scheduler classifier shared filter block support, from Jiri Pirko. 19) Avoid locking in act_csum, from Davide Caratti. 20) devinet_ioctl() simplifications from Al viro. 21) More TCP bpf improvements from Lawrence Brakmo. 22) Add support for onlink ipv6 route flag, similar to ipv4, from David Ahern. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1925 commits) tls: Add support for encryption using async offload accelerator ip6mr: fix stale iterator net/sched: kconfig: Remove blank help texts openvswitch: meter: Use 64-bit arithmetic instead of 32-bit tcp_nv: fix potential integer overflow in tcpnv_acked r8169: fix RTL8168EP take too long to complete driver initialization. qmi_wwan: Add support for Quectel EP06 rtnetlink: enable IFLA_IF_NETNSID for RTM_NEWLINK ipmr: Fix ptrdiff_t print formatting ibmvnic: Wait for device response when changing MAC qlcnic: fix deadlock bug tcp: release sk_frag.page in tcp_disconnect ipv4: Get the address of interface correctly. net_sched: gen_estimator: fix lockdep splat net: macb: Handle HRESP error net/mlx5e: IPoIB, Fix copy-paste bug in flow steering refactoring ipv6: addrconf: break critical section in addrconf_verify_rtnl() ipv6: change route cache aging logic i40e/i40evf: Update DESC_NEEDED value to reflect larger value bnxt_en: cleanup DIM work on device shutdown ...
327 lines
11 KiB
C
327 lines
11 KiB
C
/*
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* NET An implementation of the SOCKET network access protocol.
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* This is the master header file for the Linux NET layer,
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* or, in plain English: the networking handling part of the
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* kernel.
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*
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* Version: @(#)net.h 1.0.3 05/25/93
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*
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* Authors: Orest Zborowski, <obz@Kodak.COM>
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* Ross Biro
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _LINUX_NET_H
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#define _LINUX_NET_H
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#include <linux/stringify.h>
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#include <linux/random.h>
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#include <linux/wait.h>
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#include <linux/fcntl.h> /* For O_CLOEXEC and O_NONBLOCK */
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#include <linux/rcupdate.h>
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#include <linux/once.h>
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#include <linux/fs.h>
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#include <uapi/linux/net.h>
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struct poll_table_struct;
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struct pipe_inode_info;
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struct inode;
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struct file;
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struct net;
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/* Historically, SOCKWQ_ASYNC_NOSPACE & SOCKWQ_ASYNC_WAITDATA were located
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* in sock->flags, but moved into sk->sk_wq->flags to be RCU protected.
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* Eventually all flags will be in sk->sk_wq->flags.
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*/
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#define SOCKWQ_ASYNC_NOSPACE 0
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#define SOCKWQ_ASYNC_WAITDATA 1
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#define SOCK_NOSPACE 2
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#define SOCK_PASSCRED 3
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#define SOCK_PASSSEC 4
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#ifndef ARCH_HAS_SOCKET_TYPES
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/**
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* enum sock_type - Socket types
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* @SOCK_STREAM: stream (connection) socket
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* @SOCK_DGRAM: datagram (conn.less) socket
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* @SOCK_RAW: raw socket
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* @SOCK_RDM: reliably-delivered message
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* @SOCK_SEQPACKET: sequential packet socket
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* @SOCK_DCCP: Datagram Congestion Control Protocol socket
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* @SOCK_PACKET: linux specific way of getting packets at the dev level.
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* For writing rarp and other similar things on the user level.
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*
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* When adding some new socket type please
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* grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
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* overrides this enum for binary compat reasons.
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*/
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enum sock_type {
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SOCK_STREAM = 1,
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SOCK_DGRAM = 2,
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SOCK_RAW = 3,
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SOCK_RDM = 4,
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SOCK_SEQPACKET = 5,
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SOCK_DCCP = 6,
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SOCK_PACKET = 10,
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};
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#define SOCK_MAX (SOCK_PACKET + 1)
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/* Mask which covers at least up to SOCK_MASK-1. The
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* remaining bits are used as flags. */
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#define SOCK_TYPE_MASK 0xf
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/* Flags for socket, socketpair, accept4 */
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#define SOCK_CLOEXEC O_CLOEXEC
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#ifndef SOCK_NONBLOCK
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#define SOCK_NONBLOCK O_NONBLOCK
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#endif
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#endif /* ARCH_HAS_SOCKET_TYPES */
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enum sock_shutdown_cmd {
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SHUT_RD,
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SHUT_WR,
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SHUT_RDWR,
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};
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struct socket_wq {
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/* Note: wait MUST be first field of socket_wq */
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wait_queue_head_t wait;
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struct fasync_struct *fasync_list;
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unsigned long flags; /* %SOCKWQ_ASYNC_NOSPACE, etc */
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struct rcu_head rcu;
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} ____cacheline_aligned_in_smp;
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/**
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* struct socket - general BSD socket
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* @state: socket state (%SS_CONNECTED, etc)
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* @type: socket type (%SOCK_STREAM, etc)
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* @flags: socket flags (%SOCK_NOSPACE, etc)
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* @ops: protocol specific socket operations
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* @file: File back pointer for gc
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* @sk: internal networking protocol agnostic socket representation
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* @wq: wait queue for several uses
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*/
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struct socket {
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socket_state state;
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short type;
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unsigned long flags;
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struct socket_wq __rcu *wq;
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struct file *file;
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struct sock *sk;
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const struct proto_ops *ops;
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};
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struct vm_area_struct;
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struct page;
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struct sockaddr;
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struct msghdr;
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struct module;
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struct sk_buff;
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typedef int (*sk_read_actor_t)(read_descriptor_t *, struct sk_buff *,
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unsigned int, size_t);
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struct proto_ops {
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int family;
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struct module *owner;
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int (*release) (struct socket *sock);
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int (*bind) (struct socket *sock,
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struct sockaddr *myaddr,
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int sockaddr_len);
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int (*connect) (struct socket *sock,
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struct sockaddr *vaddr,
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int sockaddr_len, int flags);
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int (*socketpair)(struct socket *sock1,
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struct socket *sock2);
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int (*accept) (struct socket *sock,
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struct socket *newsock, int flags, bool kern);
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int (*getname) (struct socket *sock,
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struct sockaddr *addr,
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int *sockaddr_len, int peer);
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__poll_t (*poll) (struct file *file, struct socket *sock,
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struct poll_table_struct *wait);
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int (*ioctl) (struct socket *sock, unsigned int cmd,
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unsigned long arg);
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#ifdef CONFIG_COMPAT
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int (*compat_ioctl) (struct socket *sock, unsigned int cmd,
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unsigned long arg);
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#endif
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int (*listen) (struct socket *sock, int len);
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int (*shutdown) (struct socket *sock, int flags);
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int (*setsockopt)(struct socket *sock, int level,
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int optname, char __user *optval, unsigned int optlen);
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int (*getsockopt)(struct socket *sock, int level,
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int optname, char __user *optval, int __user *optlen);
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#ifdef CONFIG_COMPAT
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int (*compat_setsockopt)(struct socket *sock, int level,
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int optname, char __user *optval, unsigned int optlen);
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int (*compat_getsockopt)(struct socket *sock, int level,
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int optname, char __user *optval, int __user *optlen);
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#endif
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int (*sendmsg) (struct socket *sock, struct msghdr *m,
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size_t total_len);
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/* Notes for implementing recvmsg:
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* ===============================
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* msg->msg_namelen should get updated by the recvmsg handlers
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* iff msg_name != NULL. It is by default 0 to prevent
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* returning uninitialized memory to user space. The recvfrom
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* handlers can assume that msg.msg_name is either NULL or has
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* a minimum size of sizeof(struct sockaddr_storage).
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*/
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int (*recvmsg) (struct socket *sock, struct msghdr *m,
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size_t total_len, int flags);
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int (*mmap) (struct file *file, struct socket *sock,
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struct vm_area_struct * vma);
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ssize_t (*sendpage) (struct socket *sock, struct page *page,
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int offset, size_t size, int flags);
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ssize_t (*splice_read)(struct socket *sock, loff_t *ppos,
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struct pipe_inode_info *pipe, size_t len, unsigned int flags);
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int (*set_peek_off)(struct sock *sk, int val);
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int (*peek_len)(struct socket *sock);
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/* The following functions are called internally by kernel with
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* sock lock already held.
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*/
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int (*read_sock)(struct sock *sk, read_descriptor_t *desc,
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sk_read_actor_t recv_actor);
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int (*sendpage_locked)(struct sock *sk, struct page *page,
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int offset, size_t size, int flags);
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int (*sendmsg_locked)(struct sock *sk, struct msghdr *msg,
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size_t size);
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};
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#define DECLARE_SOCKADDR(type, dst, src) \
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type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; })
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struct net_proto_family {
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int family;
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int (*create)(struct net *net, struct socket *sock,
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int protocol, int kern);
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struct module *owner;
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};
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struct iovec;
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struct kvec;
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enum {
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SOCK_WAKE_IO,
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SOCK_WAKE_WAITD,
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SOCK_WAKE_SPACE,
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SOCK_WAKE_URG,
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};
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int sock_wake_async(struct socket_wq *sk_wq, int how, int band);
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int sock_register(const struct net_proto_family *fam);
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void sock_unregister(int family);
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int __sock_create(struct net *net, int family, int type, int proto,
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struct socket **res, int kern);
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int sock_create(int family, int type, int proto, struct socket **res);
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int sock_create_kern(struct net *net, int family, int type, int proto, struct socket **res);
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int sock_create_lite(int family, int type, int proto, struct socket **res);
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struct socket *sock_alloc(void);
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void sock_release(struct socket *sock);
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int sock_sendmsg(struct socket *sock, struct msghdr *msg);
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int sock_recvmsg(struct socket *sock, struct msghdr *msg, int flags);
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struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname);
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struct socket *sockfd_lookup(int fd, int *err);
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struct socket *sock_from_file(struct file *file, int *err);
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#define sockfd_put(sock) fput(sock->file)
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int net_ratelimit(void);
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#define net_ratelimited_function(function, ...) \
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do { \
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if (net_ratelimit()) \
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function(__VA_ARGS__); \
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} while (0)
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#define net_emerg_ratelimited(fmt, ...) \
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net_ratelimited_function(pr_emerg, fmt, ##__VA_ARGS__)
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#define net_alert_ratelimited(fmt, ...) \
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net_ratelimited_function(pr_alert, fmt, ##__VA_ARGS__)
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#define net_crit_ratelimited(fmt, ...) \
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net_ratelimited_function(pr_crit, fmt, ##__VA_ARGS__)
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#define net_err_ratelimited(fmt, ...) \
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net_ratelimited_function(pr_err, fmt, ##__VA_ARGS__)
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#define net_notice_ratelimited(fmt, ...) \
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net_ratelimited_function(pr_notice, fmt, ##__VA_ARGS__)
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#define net_warn_ratelimited(fmt, ...) \
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net_ratelimited_function(pr_warn, fmt, ##__VA_ARGS__)
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#define net_info_ratelimited(fmt, ...) \
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net_ratelimited_function(pr_info, fmt, ##__VA_ARGS__)
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#if defined(CONFIG_DYNAMIC_DEBUG)
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#define net_dbg_ratelimited(fmt, ...) \
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do { \
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DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
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if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT) && \
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net_ratelimit()) \
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__dynamic_pr_debug(&descriptor, pr_fmt(fmt), \
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##__VA_ARGS__); \
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} while (0)
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#elif defined(DEBUG)
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#define net_dbg_ratelimited(fmt, ...) \
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net_ratelimited_function(pr_debug, fmt, ##__VA_ARGS__)
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#else
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#define net_dbg_ratelimited(fmt, ...) \
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do { \
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if (0) \
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no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
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} while (0)
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#endif
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#define net_get_random_once(buf, nbytes) \
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get_random_once((buf), (nbytes))
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#define net_get_random_once_wait(buf, nbytes) \
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get_random_once_wait((buf), (nbytes))
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int kernel_sendmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec,
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size_t num, size_t len);
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int kernel_sendmsg_locked(struct sock *sk, struct msghdr *msg,
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struct kvec *vec, size_t num, size_t len);
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int kernel_recvmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec,
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size_t num, size_t len, int flags);
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int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen);
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int kernel_listen(struct socket *sock, int backlog);
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int kernel_accept(struct socket *sock, struct socket **newsock, int flags);
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int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen,
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int flags);
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int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
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int *addrlen);
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int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
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int *addrlen);
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int kernel_getsockopt(struct socket *sock, int level, int optname, char *optval,
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int *optlen);
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int kernel_setsockopt(struct socket *sock, int level, int optname, char *optval,
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unsigned int optlen);
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int kernel_sendpage(struct socket *sock, struct page *page, int offset,
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size_t size, int flags);
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int kernel_sendpage_locked(struct sock *sk, struct page *page, int offset,
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size_t size, int flags);
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int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how);
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/* Routine returns the IP overhead imposed by a (caller-protected) socket. */
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u32 kernel_sock_ip_overhead(struct sock *sk);
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#define MODULE_ALIAS_NETPROTO(proto) \
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MODULE_ALIAS("net-pf-" __stringify(proto))
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#define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
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MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
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#define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \
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MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
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"-type-" __stringify(type))
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#define MODULE_ALIAS_NET_PF_PROTO_NAME(pf, proto, name) \
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MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
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name)
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#endif /* _LINUX_NET_H */
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