redonkable/remarkable-linux
redonkable/remarkable-linux
1
0
Fork 0
Code Releases Activity
remarkable-linux/include/linux/net.h
Ulrich Drepper c019bbc612 flag parameters: paccept w/out set_restore_sigmask 
Some platforms do not have support to restore the signal mask in the
return path from a syscall.  For those platforms syscalls like pselect are
not defined at all.  This is, I think, not a good choice for paccept()
since paccept() adds more value on top of accept() than just the signal
mask handling.

Therefore this patch defines a scaled down version of the sys_paccept
function for those platforms.  It returns -EINVAL in case the signal mask
is non-NULL but behaves the same otherwise.

Note that I explicitly included <linux/thread_info.h>.  I saw that it is
currently included but indirectly two levels down.  There is too much risk
in relying on this.  The header might change and then suddenly the
function definition would change without anyone immediately noticing.

Signed-off-by: Ulrich Drepper <drepper@redhat.com>
Cc: Davide Libenzi <davidel@xmailserver.org>
Cc: Michael Kerrisk <mtk.manpages@googlemail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-24 10:47:27 -07:00

360 lines
12 KiB
C
Raw Blame History

/*
* NET An implementation of the SOCKET network access protocol.
* This is the master header file for the Linux NET layer,
* or, in plain English: the networking handling part of the
* kernel.
*
* Version: @(#)net.h 1.0.3 05/25/93
*
* Authors: Orest Zborowski, <obz@Kodak.COM>
* Ross Biro
* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
*
* 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 _LINUX_NET_H
#define _LINUX_NET_H
#include <linux/wait.h>
#include <linux/socket.h>
#include <linux/fcntl.h> /* For O_CLOEXEC */
#include <asm/socket.h>
struct poll_table_struct;
struct pipe_inode_info;
struct inode;
struct net;
#define NPROTO AF_MAX
#define SYS_SOCKET 1 /* sys_socket(2) */
#define SYS_BIND 2 /* sys_bind(2) */
#define SYS_CONNECT 3 /* sys_connect(2) */
#define SYS_LISTEN 4 /* sys_listen(2) */
#define SYS_ACCEPT 5 /* sys_accept(2) */
#define SYS_GETSOCKNAME 6 /* sys_getsockname(2) */
#define SYS_GETPEERNAME 7 /* sys_getpeername(2) */
#define SYS_SOCKETPAIR 8 /* sys_socketpair(2) */
#define SYS_SEND 9 /* sys_send(2) */
#define SYS_RECV 10 /* sys_recv(2) */
#define SYS_SENDTO 11 /* sys_sendto(2) */
#define SYS_RECVFROM 12 /* sys_recvfrom(2) */
#define SYS_SHUTDOWN 13 /* sys_shutdown(2) */
#define SYS_SETSOCKOPT 14 /* sys_setsockopt(2) */
#define SYS_GETSOCKOPT 15 /* sys_getsockopt(2) */
#define SYS_SENDMSG 16 /* sys_sendmsg(2) */
#define SYS_RECVMSG 17 /* sys_recvmsg(2) */
#define SYS_PACCEPT 18 /* sys_paccept(2) */
typedef enum {
SS_FREE = 0, /* not allocated */
SS_UNCONNECTED, /* unconnected to any socket */
SS_CONNECTING, /* in process of connecting */
SS_CONNECTED, /* connected to socket */
SS_DISCONNECTING /* in process of disconnecting */
} socket_state;
#define __SO_ACCEPTCON (1 << 16) /* performed a listen */
#ifdef __KERNEL__
#include <linux/stringify.h>
#include <linux/random.h>
#define SOCK_ASYNC_NOSPACE 0
#define SOCK_ASYNC_WAITDATA 1
#define SOCK_NOSPACE 2
#define SOCK_PASSCRED 3
#define SOCK_PASSSEC 4
#ifndef ARCH_HAS_SOCKET_TYPES
/**
* enum sock_type - Socket types
* @SOCK_STREAM: stream (connection) socket
* @SOCK_DGRAM: datagram (conn.less) socket
* @SOCK_RAW: raw socket
* @SOCK_RDM: reliably-delivered message
* @SOCK_SEQPACKET: sequential packet socket
* @SOCK_DCCP: Datagram Congestion Control Protocol socket
* @SOCK_PACKET: linux specific way of getting packets at the dev level.
* For writing rarp and other similar things on the user level.
*
* When adding some new socket type please
* grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
* overrides this enum for binary compat reasons.
*/
enum sock_type {
SOCK_STREAM = 1,
SOCK_DGRAM = 2,
SOCK_RAW = 3,
SOCK_RDM = 4,
SOCK_SEQPACKET = 5,
SOCK_DCCP = 6,
SOCK_PACKET = 10,
};
#define SOCK_MAX (SOCK_PACKET + 1)
/* Mask which covers at least up to SOCK_MASK-1. The
* remaining bits are used as flags. */
#define SOCK_TYPE_MASK 0xf
/* Flags for socket, socketpair, paccept */
#define SOCK_CLOEXEC O_CLOEXEC
#ifndef SOCK_NONBLOCK
#define SOCK_NONBLOCK O_NONBLOCK
#endif
#endif /* ARCH_HAS_SOCKET_TYPES */
enum sock_shutdown_cmd {
SHUT_RD = 0,
SHUT_WR = 1,
SHUT_RDWR = 2,
};
/**
* struct socket - general BSD socket
* @state: socket state (%SS_CONNECTED, etc)
* @type: socket type (%SOCK_STREAM, etc)
* @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc)
* @ops: protocol specific socket operations
* @fasync_list: Asynchronous wake up list
* @file: File back pointer for gc
* @sk: internal networking protocol agnostic socket representation
* @wait: wait queue for several uses
*/
struct socket {
socket_state state;
short type;
unsigned long flags;
const struct proto_ops *ops;
struct fasync_struct *fasync_list;
struct file *file;
struct sock *sk;
wait_queue_head_t wait;
};
struct vm_area_struct;
struct page;
struct kiocb;
struct sockaddr;
struct msghdr;
struct module;
struct proto_ops {
int family;
struct module *owner;
int (*release) (struct socket *sock);
int (*bind) (struct socket *sock,
struct sockaddr *myaddr,
int sockaddr_len);
int (*connect) (struct socket *sock,
struct sockaddr *vaddr,
int sockaddr_len, int flags);
int (*socketpair)(struct socket *sock1,
struct socket *sock2);
int (*accept) (struct socket *sock,
struct socket *newsock, int flags);
int (*getname) (struct socket *sock,
struct sockaddr *addr,
int *sockaddr_len, int peer);
unsigned int (*poll) (struct file *file, struct socket *sock,
struct poll_table_struct *wait);
int (*ioctl) (struct socket *sock, unsigned int cmd,
unsigned long arg);
int (*compat_ioctl) (struct socket *sock, unsigned int cmd,
unsigned long arg);
int (*listen) (struct socket *sock, int len);
int (*shutdown) (struct socket *sock, int flags);
int (*setsockopt)(struct socket *sock, int level,
int optname, char __user *optval, int optlen);
int (*getsockopt)(struct socket *sock, int level,
int optname, char __user *optval, int __user *optlen);
int (*compat_setsockopt)(struct socket *sock, int level,
int optname, char __user *optval, int optlen);
int (*compat_getsockopt)(struct socket *sock, int level,
int optname, char __user *optval, int __user *optlen);
int (*sendmsg) (struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t total_len);
int (*recvmsg) (struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t total_len,
int flags);
int (*mmap) (struct file *file, struct socket *sock,
struct vm_area_struct * vma);
ssize_t (*sendpage) (struct socket *sock, struct page *page,
int offset, size_t size, int flags);
ssize_t (*splice_read)(struct socket *sock, loff_t *ppos,
struct pipe_inode_info *pipe, size_t len, unsigned int flags);
};
struct net_proto_family {
int family;
int (*create)(struct net *net, struct socket *sock, int protocol);
struct module *owner;
};
struct iovec;
struct kvec;
enum {
SOCK_WAKE_IO,
SOCK_WAKE_WAITD,
SOCK_WAKE_SPACE,
SOCK_WAKE_URG,
};
extern int sock_wake_async(struct socket *sk, int how, int band);
extern int sock_register(const struct net_proto_family *fam);
extern void sock_unregister(int family);
extern int sock_create(int family, int type, int proto,
struct socket **res);
extern int sock_create_kern(int family, int type, int proto,
struct socket **res);
extern int sock_create_lite(int family, int type, int proto,
struct socket **res);
extern void sock_release(struct socket *sock);
extern int sock_sendmsg(struct socket *sock, struct msghdr *msg,
size_t len);
extern int sock_recvmsg(struct socket *sock, struct msghdr *msg,
size_t size, int flags);
extern int sock_map_fd(struct socket *sock, int flags);
extern struct socket *sockfd_lookup(int fd, int *err);
#define sockfd_put(sock) fput(sock->file)
extern int net_ratelimit(void);
extern long do_accept(int fd, struct sockaddr __user *upeer_sockaddr,
int __user *upeer_addrlen, int flags);
#define net_random() random32()
#define net_srandom(seed) srandom32((__force u32)seed)
extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
struct kvec *vec, size_t num, size_t len);
extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
struct kvec *vec, size_t num,
size_t len, int flags);
extern int kernel_bind(struct socket *sock, struct sockaddr *addr,
int addrlen);
extern int kernel_listen(struct socket *sock, int backlog);
extern int kernel_accept(struct socket *sock, struct socket **newsock,
int flags);
extern int kernel_connect(struct socket *sock, struct sockaddr *addr,
int addrlen, int flags);
extern int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
int *addrlen);
extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
int *addrlen);
extern int kernel_getsockopt(struct socket *sock, int level, int optname,
char *optval, int *optlen);
extern int kernel_setsockopt(struct socket *sock, int level, int optname,
char *optval, int optlen);
extern int kernel_sendpage(struct socket *sock, struct page *page, int offset,
size_t size, int flags);
extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
extern int kernel_sock_shutdown(struct socket *sock,
enum sock_shutdown_cmd how);
#ifndef CONFIG_SMP
#define SOCKOPS_WRAPPED(name) name
#define SOCKOPS_WRAP(name, fam)
#else
#define SOCKOPS_WRAPPED(name) __unlocked_##name
#define SOCKCALL_WRAP(name, call, parms, args) \
static int __lock_##name##_##call parms \
{ \
int ret; \
lock_kernel(); \
ret = __unlocked_##name##_ops.call args ;\
unlock_kernel(); \
return ret; \
}
#define SOCKCALL_UWRAP(name, call, parms, args) \
static unsigned int __lock_##name##_##call parms \
{ \
int ret; \
lock_kernel(); \
ret = __unlocked_##name##_ops.call args ;\
unlock_kernel(); \
return ret; \
}
#define SOCKOPS_WRAP(name, fam) \
SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \
SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \
(sock, uaddr, addr_len)) \
SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \
int addr_len, int flags), \
(sock, uaddr, addr_len, flags)) \
SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \
(sock1, sock2)) \
SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \
int flags), (sock, newsock, flags)) \
SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \
int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \
SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \
(file, sock, wait)) \
SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \
unsigned long arg), (sock, cmd, arg)) \
SOCKCALL_WRAP(name, compat_ioctl, (struct socket *sock, unsigned int cmd, \
unsigned long arg), (sock, cmd, arg)) \
SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \
SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \
SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \
char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \
SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \
char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \
SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \
(iocb, sock, m, len)) \
SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \
(iocb, sock, m, len, flags)) \
SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \
(file, sock, vma)) \
\
static const struct proto_ops name##_ops = { \
.family = fam, \
.owner = THIS_MODULE, \
.release = __lock_##name##_release, \
.bind = __lock_##name##_bind, \
.connect = __lock_##name##_connect, \
.socketpair = __lock_##name##_socketpair, \
.accept = __lock_##name##_accept, \
.getname = __lock_##name##_getname, \
.poll = __lock_##name##_poll, \
.ioctl = __lock_##name##_ioctl, \
.compat_ioctl = __lock_##name##_compat_ioctl, \
.listen = __lock_##name##_listen, \
.shutdown = __lock_##name##_shutdown, \
.setsockopt = __lock_##name##_setsockopt, \
.getsockopt = __lock_##name##_getsockopt, \
.sendmsg = __lock_##name##_sendmsg, \
.recvmsg = __lock_##name##_recvmsg, \
.mmap = __lock_##name##_mmap, \
};
#endif
#define MODULE_ALIAS_NETPROTO(proto) \
MODULE_ALIAS("net-pf-" __stringify(proto))
#define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
#define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \
MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
"-type-" __stringify(type))
#ifdef CONFIG_SYSCTL
#include <linux/sysctl.h>
extern int net_msg_cost;
extern int net_msg_burst;
#endif
#endif /* __KERNEL__ */
#endif /* _LINUX_NET_H */
View git blame Copy permalink