/*
|
/*
|
* NET An implementation of the SOCKET network access protocol.
|
* NET An implementation of the SOCKET network access protocol.
|
*
|
*
|
* Version: @(#)socket.c 1.1.93 18/02/95
|
* Version: @(#)socket.c 1.1.93 18/02/95
|
*
|
*
|
* Authors: Orest Zborowski, <obz@Kodak.COM>
|
* Authors: Orest Zborowski, <obz@Kodak.COM>
|
* Ross Biro, <bir7@leland.Stanford.Edu>
|
* Ross Biro, <bir7@leland.Stanford.Edu>
|
* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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*
|
*
|
* Fixes:
|
* Fixes:
|
* Anonymous : NOTSOCK/BADF cleanup. Error fix in
|
* Anonymous : NOTSOCK/BADF cleanup. Error fix in
|
* shutdown()
|
* shutdown()
|
* Alan Cox : verify_area() fixes
|
* Alan Cox : verify_area() fixes
|
* Alan Cox : Removed DDI
|
* Alan Cox : Removed DDI
|
* Jonathan Kamens : SOCK_DGRAM reconnect bug
|
* Jonathan Kamens : SOCK_DGRAM reconnect bug
|
* Alan Cox : Moved a load of checks to the very
|
* Alan Cox : Moved a load of checks to the very
|
* top level.
|
* top level.
|
* Alan Cox : Move address structures to/from user
|
* Alan Cox : Move address structures to/from user
|
* mode above the protocol layers.
|
* mode above the protocol layers.
|
* Rob Janssen : Allow 0 length sends.
|
* Rob Janssen : Allow 0 length sends.
|
* Alan Cox : Asynchronous I/O support (cribbed from the
|
* Alan Cox : Asynchronous I/O support (cribbed from the
|
* tty drivers).
|
* tty drivers).
|
* Niibe Yutaka : Asynchronous I/O for writes (4.4BSD style)
|
* Niibe Yutaka : Asynchronous I/O for writes (4.4BSD style)
|
* Jeff Uphoff : Made max number of sockets command-line
|
* Jeff Uphoff : Made max number of sockets command-line
|
* configurable.
|
* configurable.
|
* Matti Aarnio : Made the number of sockets dynamic,
|
* Matti Aarnio : Made the number of sockets dynamic,
|
* to be allocated when needed, and mr.
|
* to be allocated when needed, and mr.
|
* Uphoff's max is used as max to be
|
* Uphoff's max is used as max to be
|
* allowed to allocate.
|
* allowed to allocate.
|
* Linus : Argh. removed all the socket allocation
|
* Linus : Argh. removed all the socket allocation
|
* altogether: it's in the inode now.
|
* altogether: it's in the inode now.
|
* Alan Cox : Made sock_alloc()/sock_release() public
|
* Alan Cox : Made sock_alloc()/sock_release() public
|
* for NetROM and future kernel nfsd type
|
* for NetROM and future kernel nfsd type
|
* stuff.
|
* stuff.
|
* Alan Cox : sendmsg/recvmsg basics.
|
* Alan Cox : sendmsg/recvmsg basics.
|
* Tom Dyas : Export net symbols.
|
* Tom Dyas : Export net symbols.
|
* Marcin Dalecki : Fixed problems with CONFIG_NET="n".
|
* Marcin Dalecki : Fixed problems with CONFIG_NET="n".
|
* Alan Cox : Added thread locking to sys_* calls
|
* Alan Cox : Added thread locking to sys_* calls
|
* for sockets. May have errors at the
|
* for sockets. May have errors at the
|
* moment.
|
* moment.
|
* Kevin Buhr : Fixed the dumb errors in the above.
|
* Kevin Buhr : Fixed the dumb errors in the above.
|
* Andi Kleen : Some small cleanups, optimizations,
|
* Andi Kleen : Some small cleanups, optimizations,
|
* and fixed a copy_from_user() bug.
|
* and fixed a copy_from_user() bug.
|
* Tigran Aivazian : sys_send(args) calls sys_sendto(args, NULL, 0)
|
* Tigran Aivazian : sys_send(args) calls sys_sendto(args, NULL, 0)
|
* Tigran Aivazian : Made listen(2) backlog sanity checks
|
* Tigran Aivazian : Made listen(2) backlog sanity checks
|
* protocol-independent
|
* protocol-independent
|
*
|
*
|
*
|
*
|
* This program is free software; you can redistribute it and/or
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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
|
* modify it under the terms of the GNU General Public License
|
* as published by the Free Software Foundation; either version
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* as published by the Free Software Foundation; either version
|
* 2 of the License, or (at your option) any later version.
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* 2 of the License, or (at your option) any later version.
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*
|
*
|
*
|
*
|
* This module is effectively the top level interface to the BSD socket
|
* This module is effectively the top level interface to the BSD socket
|
* paradigm.
|
* paradigm.
|
*
|
*
|
*/
|
*/
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|
|
#include <linux/config.h>
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#include <linux/config.h>
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#include <linux/mm.h>
|
#include <linux/mm.h>
|
#include <linux/smp_lock.h>
|
#include <linux/smp_lock.h>
|
#include <linux/socket.h>
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#include <linux/socket.h>
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#include <linux/file.h>
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#include <linux/file.h>
|
#include <linux/net.h>
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#include <linux/net.h>
|
#include <linux/interrupt.h>
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#include <linux/interrupt.h>
|
#include <linux/netdevice.h>
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#include <linux/netdevice.h>
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#include <linux/proc_fs.h>
|
#include <linux/proc_fs.h>
|
#include <linux/wanrouter.h>
|
#include <linux/wanrouter.h>
|
#include <linux/netlink.h>
|
#include <linux/netlink.h>
|
#include <linux/rtnetlink.h>
|
#include <linux/rtnetlink.h>
|
#include <linux/init.h>
|
#include <linux/init.h>
|
#include <linux/poll.h>
|
#include <linux/poll.h>
|
#include <linux/cache.h>
|
#include <linux/cache.h>
|
#include <linux/module.h>
|
#include <linux/module.h>
|
#include <linux/highmem.h>
|
#include <linux/highmem.h>
|
|
|
#if defined(CONFIG_KMOD) && defined(CONFIG_NET)
|
#if defined(CONFIG_KMOD) && defined(CONFIG_NET)
|
#include <linux/kmod.h>
|
#include <linux/kmod.h>
|
#endif
|
#endif
|
|
|
#include <asm/uaccess.h>
|
#include <asm/uaccess.h>
|
|
|
#include <net/sock.h>
|
#include <net/sock.h>
|
#include <net/scm.h>
|
#include <net/scm.h>
|
#include <linux/netfilter.h>
|
#include <linux/netfilter.h>
|
|
|
static int sock_no_open(struct inode *irrelevant, struct file *dontcare);
|
static int sock_no_open(struct inode *irrelevant, struct file *dontcare);
|
static ssize_t sock_read(struct file *file, char *buf,
|
static ssize_t sock_read(struct file *file, char *buf,
|
size_t size, loff_t *ppos);
|
size_t size, loff_t *ppos);
|
static ssize_t sock_write(struct file *file, const char *buf,
|
static ssize_t sock_write(struct file *file, const char *buf,
|
size_t size, loff_t *ppos);
|
size_t size, loff_t *ppos);
|
static int sock_mmap(struct file *file, struct vm_area_struct * vma);
|
static int sock_mmap(struct file *file, struct vm_area_struct * vma);
|
|
|
static int sock_close(struct inode *inode, struct file *file);
|
static int sock_close(struct inode *inode, struct file *file);
|
static unsigned int sock_poll(struct file *file,
|
static unsigned int sock_poll(struct file *file,
|
struct poll_table_struct *wait);
|
struct poll_table_struct *wait);
|
static int sock_ioctl(struct inode *inode, struct file *file,
|
static int sock_ioctl(struct inode *inode, struct file *file,
|
unsigned int cmd, unsigned long arg);
|
unsigned int cmd, unsigned long arg);
|
static int sock_fasync(int fd, struct file *filp, int on);
|
static int sock_fasync(int fd, struct file *filp, int on);
|
static ssize_t sock_readv(struct file *file, const struct iovec *vector,
|
static ssize_t sock_readv(struct file *file, const struct iovec *vector,
|
unsigned long count, loff_t *ppos);
|
unsigned long count, loff_t *ppos);
|
static ssize_t sock_writev(struct file *file, const struct iovec *vector,
|
static ssize_t sock_writev(struct file *file, const struct iovec *vector,
|
unsigned long count, loff_t *ppos);
|
unsigned long count, loff_t *ppos);
|
static ssize_t sock_sendpage(struct file *file, struct page *page,
|
static ssize_t sock_sendpage(struct file *file, struct page *page,
|
int offset, size_t size, loff_t *ppos, int more);
|
int offset, size_t size, loff_t *ppos, int more);
|
|
|
|
|
/*
|
/*
|
* Socket files have a set of 'special' operations as well as the generic file ones. These don't appear
|
* Socket files have a set of 'special' operations as well as the generic file ones. These don't appear
|
* in the operation structures but are done directly via the socketcall() multiplexor.
|
* in the operation structures but are done directly via the socketcall() multiplexor.
|
*/
|
*/
|
|
|
static struct file_operations socket_file_ops = {
|
static struct file_operations socket_file_ops = {
|
llseek: no_llseek,
|
llseek: no_llseek,
|
read: sock_read,
|
read: sock_read,
|
write: sock_write,
|
write: sock_write,
|
poll: sock_poll,
|
poll: sock_poll,
|
ioctl: sock_ioctl,
|
ioctl: sock_ioctl,
|
mmap: sock_mmap,
|
mmap: sock_mmap,
|
open: sock_no_open, /* special open code to disallow open via /proc */
|
open: sock_no_open, /* special open code to disallow open via /proc */
|
release: sock_close,
|
release: sock_close,
|
fasync: sock_fasync,
|
fasync: sock_fasync,
|
readv: sock_readv,
|
readv: sock_readv,
|
writev: sock_writev,
|
writev: sock_writev,
|
sendpage: sock_sendpage
|
sendpage: sock_sendpage
|
};
|
};
|
|
|
/*
|
/*
|
* The protocol list. Each protocol is registered in here.
|
* The protocol list. Each protocol is registered in here.
|
*/
|
*/
|
|
|
static struct net_proto_family *net_families[NPROTO];
|
static struct net_proto_family *net_families[NPROTO];
|
|
|
#ifdef CONFIG_SMP
|
#ifdef CONFIG_SMP
|
static atomic_t net_family_lockct = ATOMIC_INIT(0);
|
static atomic_t net_family_lockct = ATOMIC_INIT(0);
|
static spinlock_t net_family_lock = SPIN_LOCK_UNLOCKED;
|
static spinlock_t net_family_lock = SPIN_LOCK_UNLOCKED;
|
|
|
/* The strategy is: modifications net_family vector are short, do not
|
/* The strategy is: modifications net_family vector are short, do not
|
sleep and veeery rare, but read access should be free of any exclusive
|
sleep and veeery rare, but read access should be free of any exclusive
|
locks.
|
locks.
|
*/
|
*/
|
|
|
static void net_family_write_lock(void)
|
static void net_family_write_lock(void)
|
{
|
{
|
spin_lock(&net_family_lock);
|
spin_lock(&net_family_lock);
|
while (atomic_read(&net_family_lockct) != 0) {
|
while (atomic_read(&net_family_lockct) != 0) {
|
spin_unlock(&net_family_lock);
|
spin_unlock(&net_family_lock);
|
|
|
yield();
|
yield();
|
|
|
spin_lock(&net_family_lock);
|
spin_lock(&net_family_lock);
|
}
|
}
|
}
|
}
|
|
|
static __inline__ void net_family_write_unlock(void)
|
static __inline__ void net_family_write_unlock(void)
|
{
|
{
|
spin_unlock(&net_family_lock);
|
spin_unlock(&net_family_lock);
|
}
|
}
|
|
|
static __inline__ void net_family_read_lock(void)
|
static __inline__ void net_family_read_lock(void)
|
{
|
{
|
atomic_inc(&net_family_lockct);
|
atomic_inc(&net_family_lockct);
|
spin_unlock_wait(&net_family_lock);
|
spin_unlock_wait(&net_family_lock);
|
}
|
}
|
|
|
static __inline__ void net_family_read_unlock(void)
|
static __inline__ void net_family_read_unlock(void)
|
{
|
{
|
atomic_dec(&net_family_lockct);
|
atomic_dec(&net_family_lockct);
|
}
|
}
|
|
|
#else
|
#else
|
#define net_family_write_lock() do { } while(0)
|
#define net_family_write_lock() do { } while(0)
|
#define net_family_write_unlock() do { } while(0)
|
#define net_family_write_unlock() do { } while(0)
|
#define net_family_read_lock() do { } while(0)
|
#define net_family_read_lock() do { } while(0)
|
#define net_family_read_unlock() do { } while(0)
|
#define net_family_read_unlock() do { } while(0)
|
#endif
|
#endif
|
|
|
|
|
/*
|
/*
|
* Statistics counters of the socket lists
|
* Statistics counters of the socket lists
|
*/
|
*/
|
|
|
static union {
|
static union {
|
int counter;
|
int counter;
|
char __pad[SMP_CACHE_BYTES];
|
char __pad[SMP_CACHE_BYTES];
|
} sockets_in_use[NR_CPUS] __cacheline_aligned = {{0}};
|
} sockets_in_use[NR_CPUS] __cacheline_aligned = {{0}};
|
|
|
/*
|
/*
|
* Support routines. Move socket addresses back and forth across the kernel/user
|
* Support routines. Move socket addresses back and forth across the kernel/user
|
* divide and look after the messy bits.
|
* divide and look after the messy bits.
|
*/
|
*/
|
|
|
#define MAX_SOCK_ADDR 128 /* 108 for Unix domain -
|
#define MAX_SOCK_ADDR 128 /* 108 for Unix domain -
|
16 for IP, 16 for IPX,
|
16 for IP, 16 for IPX,
|
24 for IPv6,
|
24 for IPv6,
|
about 80 for AX.25
|
about 80 for AX.25
|
must be at least one bigger than
|
must be at least one bigger than
|
the AF_UNIX size (see net/unix/af_unix.c
|
the AF_UNIX size (see net/unix/af_unix.c
|
:unix_mkname()).
|
:unix_mkname()).
|
*/
|
*/
|
|
|
/**
|
/**
|
* move_addr_to_kernel - copy a socket address into kernel space
|
* move_addr_to_kernel - copy a socket address into kernel space
|
* @uaddr: Address in user space
|
* @uaddr: Address in user space
|
* @kaddr: Address in kernel space
|
* @kaddr: Address in kernel space
|
* @ulen: Length in user space
|
* @ulen: Length in user space
|
*
|
*
|
* The address is copied into kernel space. If the provided address is
|
* The address is copied into kernel space. If the provided address is
|
* too long an error code of -EINVAL is returned. If the copy gives
|
* too long an error code of -EINVAL is returned. If the copy gives
|
* invalid addresses -EFAULT is returned. On a success 0 is returned.
|
* invalid addresses -EFAULT is returned. On a success 0 is returned.
|
*/
|
*/
|
|
|
int move_addr_to_kernel(void *uaddr, int ulen, void *kaddr)
|
int move_addr_to_kernel(void *uaddr, int ulen, void *kaddr)
|
{
|
{
|
if(ulen<0||ulen>MAX_SOCK_ADDR)
|
if(ulen<0||ulen>MAX_SOCK_ADDR)
|
return -EINVAL;
|
return -EINVAL;
|
if(ulen==0)
|
if(ulen==0)
|
return 0;
|
return 0;
|
if(copy_from_user(kaddr,uaddr,ulen))
|
if(copy_from_user(kaddr,uaddr,ulen))
|
return -EFAULT;
|
return -EFAULT;
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/**
|
/**
|
* move_addr_to_user - copy an address to user space
|
* move_addr_to_user - copy an address to user space
|
* @kaddr: kernel space address
|
* @kaddr: kernel space address
|
* @klen: length of address in kernel
|
* @klen: length of address in kernel
|
* @uaddr: user space address
|
* @uaddr: user space address
|
* @ulen: pointer to user length field
|
* @ulen: pointer to user length field
|
*
|
*
|
* The value pointed to by ulen on entry is the buffer length available.
|
* The value pointed to by ulen on entry is the buffer length available.
|
* This is overwritten with the buffer space used. -EINVAL is returned
|
* This is overwritten with the buffer space used. -EINVAL is returned
|
* if an overlong buffer is specified or a negative buffer size. -EFAULT
|
* if an overlong buffer is specified or a negative buffer size. -EFAULT
|
* is returned if either the buffer or the length field are not
|
* is returned if either the buffer or the length field are not
|
* accessible.
|
* accessible.
|
* After copying the data up to the limit the user specifies, the true
|
* After copying the data up to the limit the user specifies, the true
|
* length of the data is written over the length limit the user
|
* length of the data is written over the length limit the user
|
* specified. Zero is returned for a success.
|
* specified. Zero is returned for a success.
|
*/
|
*/
|
|
|
int move_addr_to_user(void *kaddr, int klen, void *uaddr, int *ulen)
|
int move_addr_to_user(void *kaddr, int klen, void *uaddr, int *ulen)
|
{
|
{
|
int err;
|
int err;
|
int len;
|
int len;
|
|
|
if((err=get_user(len, ulen)))
|
if((err=get_user(len, ulen)))
|
return err;
|
return err;
|
if(len>klen)
|
if(len>klen)
|
len=klen;
|
len=klen;
|
if(len<0 || len> MAX_SOCK_ADDR)
|
if(len<0 || len> MAX_SOCK_ADDR)
|
return -EINVAL;
|
return -EINVAL;
|
if(len)
|
if(len)
|
{
|
{
|
if(copy_to_user(uaddr,kaddr,len))
|
if(copy_to_user(uaddr,kaddr,len))
|
return -EFAULT;
|
return -EFAULT;
|
}
|
}
|
/*
|
/*
|
* "fromlen shall refer to the value before truncation.."
|
* "fromlen shall refer to the value before truncation.."
|
* 1003.1g
|
* 1003.1g
|
*/
|
*/
|
return __put_user(klen, ulen);
|
return __put_user(klen, ulen);
|
}
|
}
|
|
|
#define SOCKFS_MAGIC 0x534F434B
|
#define SOCKFS_MAGIC 0x534F434B
|
static int sockfs_statfs(struct super_block *sb, struct statfs *buf)
|
static int sockfs_statfs(struct super_block *sb, struct statfs *buf)
|
{
|
{
|
buf->f_type = SOCKFS_MAGIC;
|
buf->f_type = SOCKFS_MAGIC;
|
buf->f_bsize = 1024;
|
buf->f_bsize = 1024;
|
buf->f_namelen = 255;
|
buf->f_namelen = 255;
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static struct super_operations sockfs_ops = {
|
static struct super_operations sockfs_ops = {
|
statfs: sockfs_statfs,
|
statfs: sockfs_statfs,
|
};
|
};
|
|
|
static struct super_block * sockfs_read_super(struct super_block *sb, void *data, int silent)
|
static struct super_block * sockfs_read_super(struct super_block *sb, void *data, int silent)
|
{
|
{
|
struct inode *root = new_inode(sb);
|
struct inode *root = new_inode(sb);
|
if (!root)
|
if (!root)
|
return NULL;
|
return NULL;
|
root->i_mode = S_IFDIR | S_IRUSR | S_IWUSR;
|
root->i_mode = S_IFDIR | S_IRUSR | S_IWUSR;
|
root->i_uid = root->i_gid = 0;
|
root->i_uid = root->i_gid = 0;
|
root->i_atime = root->i_mtime = root->i_ctime = CURRENT_TIME;
|
root->i_atime = root->i_mtime = root->i_ctime = CURRENT_TIME;
|
sb->s_blocksize = 1024;
|
sb->s_blocksize = 1024;
|
sb->s_blocksize_bits = 10;
|
sb->s_blocksize_bits = 10;
|
sb->s_magic = SOCKFS_MAGIC;
|
sb->s_magic = SOCKFS_MAGIC;
|
sb->s_op = &sockfs_ops;
|
sb->s_op = &sockfs_ops;
|
sb->s_root = d_alloc(NULL, &(const struct qstr) { "socket:", 7, 0 });
|
sb->s_root = d_alloc(NULL, &(const struct qstr) { "socket:", 7, 0 });
|
if (!sb->s_root) {
|
if (!sb->s_root) {
|
iput(root);
|
iput(root);
|
return NULL;
|
return NULL;
|
}
|
}
|
sb->s_root->d_sb = sb;
|
sb->s_root->d_sb = sb;
|
sb->s_root->d_parent = sb->s_root;
|
sb->s_root->d_parent = sb->s_root;
|
d_instantiate(sb->s_root, root);
|
d_instantiate(sb->s_root, root);
|
return sb;
|
return sb;
|
}
|
}
|
|
|
static struct vfsmount *sock_mnt;
|
static struct vfsmount *sock_mnt;
|
static DECLARE_FSTYPE(sock_fs_type, "sockfs", sockfs_read_super, FS_NOMOUNT);
|
static DECLARE_FSTYPE(sock_fs_type, "sockfs", sockfs_read_super, FS_NOMOUNT);
|
static int sockfs_delete_dentry(struct dentry *dentry)
|
static int sockfs_delete_dentry(struct dentry *dentry)
|
{
|
{
|
return 1;
|
return 1;
|
}
|
}
|
static struct dentry_operations sockfs_dentry_operations = {
|
static struct dentry_operations sockfs_dentry_operations = {
|
d_delete: sockfs_delete_dentry,
|
d_delete: sockfs_delete_dentry,
|
};
|
};
|
|
|
/*
|
/*
|
* Obtains the first available file descriptor and sets it up for use.
|
* Obtains the first available file descriptor and sets it up for use.
|
*
|
*
|
* This function creates file structure and maps it to fd space
|
* This function creates file structure and maps it to fd space
|
* of current process. On success it returns file descriptor
|
* of current process. On success it returns file descriptor
|
* and file struct implicitly stored in sock->file.
|
* and file struct implicitly stored in sock->file.
|
* Note that another thread may close file descriptor before we return
|
* Note that another thread may close file descriptor before we return
|
* from this function. We use the fact that now we do not refer
|
* from this function. We use the fact that now we do not refer
|
* to socket after mapping. If one day we will need it, this
|
* to socket after mapping. If one day we will need it, this
|
* function will increment ref. count on file by 1.
|
* function will increment ref. count on file by 1.
|
*
|
*
|
* In any case returned fd MAY BE not valid!
|
* In any case returned fd MAY BE not valid!
|
* This race condition is unavoidable
|
* This race condition is unavoidable
|
* with shared fd spaces, we cannot solve it inside kernel,
|
* with shared fd spaces, we cannot solve it inside kernel,
|
* but we take care of internal coherence yet.
|
* but we take care of internal coherence yet.
|
*/
|
*/
|
|
|
int sock_map_fd(struct socket *sock)
|
int sock_map_fd(struct socket *sock)
|
{
|
{
|
int fd;
|
int fd;
|
struct qstr this;
|
struct qstr this;
|
char name[32];
|
char name[32];
|
|
|
/*
|
/*
|
* Find a file descriptor suitable for return to the user.
|
* Find a file descriptor suitable for return to the user.
|
*/
|
*/
|
|
|
fd = get_unused_fd();
|
fd = get_unused_fd();
|
if (fd >= 0) {
|
if (fd >= 0) {
|
struct file *file = get_empty_filp();
|
struct file *file = get_empty_filp();
|
|
|
if (!file) {
|
if (!file) {
|
put_unused_fd(fd);
|
put_unused_fd(fd);
|
fd = -ENFILE;
|
fd = -ENFILE;
|
goto out;
|
goto out;
|
}
|
}
|
|
|
sprintf(name, "[%lu]", sock->inode->i_ino);
|
sprintf(name, "[%lu]", sock->inode->i_ino);
|
this.name = name;
|
this.name = name;
|
this.len = strlen(name);
|
this.len = strlen(name);
|
this.hash = sock->inode->i_ino;
|
this.hash = sock->inode->i_ino;
|
|
|
file->f_dentry = d_alloc(sock_mnt->mnt_sb->s_root, &this);
|
file->f_dentry = d_alloc(sock_mnt->mnt_sb->s_root, &this);
|
if (!file->f_dentry) {
|
if (!file->f_dentry) {
|
put_filp(file);
|
put_filp(file);
|
put_unused_fd(fd);
|
put_unused_fd(fd);
|
fd = -ENOMEM;
|
fd = -ENOMEM;
|
goto out;
|
goto out;
|
}
|
}
|
file->f_dentry->d_op = &sockfs_dentry_operations;
|
file->f_dentry->d_op = &sockfs_dentry_operations;
|
d_add(file->f_dentry, sock->inode);
|
d_add(file->f_dentry, sock->inode);
|
file->f_vfsmnt = mntget(sock_mnt);
|
file->f_vfsmnt = mntget(sock_mnt);
|
|
|
sock->file = file;
|
sock->file = file;
|
file->f_op = sock->inode->i_fop = &socket_file_ops;
|
file->f_op = sock->inode->i_fop = &socket_file_ops;
|
file->f_mode = 3;
|
file->f_mode = 3;
|
file->f_flags = O_RDWR;
|
file->f_flags = O_RDWR;
|
file->f_pos = 0;
|
file->f_pos = 0;
|
fd_install(fd, file);
|
fd_install(fd, file);
|
}
|
}
|
|
|
out:
|
out:
|
return fd;
|
return fd;
|
}
|
}
|
|
|
extern __inline__ struct socket *socki_lookup(struct inode *inode)
|
extern __inline__ struct socket *socki_lookup(struct inode *inode)
|
{
|
{
|
return &inode->u.socket_i;
|
return &inode->u.socket_i;
|
}
|
}
|
|
|
/**
|
/**
|
* sockfd_lookup - Go from a file number to its socket slot
|
* sockfd_lookup - Go from a file number to its socket slot
|
* @fd: file handle
|
* @fd: file handle
|
* @err: pointer to an error code return
|
* @err: pointer to an error code return
|
*
|
*
|
* The file handle passed in is locked and the socket it is bound
|
* The file handle passed in is locked and the socket it is bound
|
* too is returned. If an error occurs the err pointer is overwritten
|
* too is returned. If an error occurs the err pointer is overwritten
|
* with a negative errno code and NULL is returned. The function checks
|
* with a negative errno code and NULL is returned. The function checks
|
* for both invalid handles and passing a handle which is not a socket.
|
* for both invalid handles and passing a handle which is not a socket.
|
*
|
*
|
* On a success the socket object pointer is returned.
|
* On a success the socket object pointer is returned.
|
*/
|
*/
|
|
|
struct socket *sockfd_lookup(int fd, int *err)
|
struct socket *sockfd_lookup(int fd, int *err)
|
{
|
{
|
struct file *file;
|
struct file *file;
|
struct inode *inode;
|
struct inode *inode;
|
struct socket *sock;
|
struct socket *sock;
|
|
|
if (!(file = fget(fd)))
|
if (!(file = fget(fd)))
|
{
|
{
|
*err = -EBADF;
|
*err = -EBADF;
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
inode = file->f_dentry->d_inode;
|
inode = file->f_dentry->d_inode;
|
if (!inode->i_sock || !(sock = socki_lookup(inode)))
|
if (!inode->i_sock || !(sock = socki_lookup(inode)))
|
{
|
{
|
*err = -ENOTSOCK;
|
*err = -ENOTSOCK;
|
fput(file);
|
fput(file);
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
if (sock->file != file) {
|
if (sock->file != file) {
|
printk(KERN_ERR "socki_lookup: socket file changed!\n");
|
printk(KERN_ERR "socki_lookup: socket file changed!\n");
|
sock->file = file;
|
sock->file = file;
|
}
|
}
|
return sock;
|
return sock;
|
}
|
}
|
|
|
extern __inline__ void sockfd_put(struct socket *sock)
|
extern __inline__ void sockfd_put(struct socket *sock)
|
{
|
{
|
fput(sock->file);
|
fput(sock->file);
|
}
|
}
|
|
|
/**
|
/**
|
* sock_alloc - allocate a socket
|
* sock_alloc - allocate a socket
|
*
|
*
|
* Allocate a new inode and socket object. The two are bound together
|
* Allocate a new inode and socket object. The two are bound together
|
* and initialised. The socket is then returned. If we are out of inodes
|
* and initialised. The socket is then returned. If we are out of inodes
|
* NULL is returned.
|
* NULL is returned.
|
*/
|
*/
|
|
|
struct socket *sock_alloc(void)
|
struct socket *sock_alloc(void)
|
{
|
{
|
struct inode * inode;
|
struct inode * inode;
|
struct socket * sock;
|
struct socket * sock;
|
|
|
inode = new_inode(sock_mnt->mnt_sb);
|
inode = new_inode(sock_mnt->mnt_sb);
|
if (!inode)
|
if (!inode)
|
return NULL;
|
return NULL;
|
|
|
inode->i_dev = NODEV;
|
inode->i_dev = NODEV;
|
sock = socki_lookup(inode);
|
sock = socki_lookup(inode);
|
|
|
inode->i_mode = S_IFSOCK|S_IRWXUGO;
|
inode->i_mode = S_IFSOCK|S_IRWXUGO;
|
inode->i_sock = 1;
|
inode->i_sock = 1;
|
inode->i_uid = current->fsuid;
|
inode->i_uid = current->fsuid;
|
inode->i_gid = current->fsgid;
|
inode->i_gid = current->fsgid;
|
|
|
sock->inode = inode;
|
sock->inode = inode;
|
init_waitqueue_head(&sock->wait);
|
init_waitqueue_head(&sock->wait);
|
sock->fasync_list = NULL;
|
sock->fasync_list = NULL;
|
sock->state = SS_UNCONNECTED;
|
sock->state = SS_UNCONNECTED;
|
sock->flags = 0;
|
sock->flags = 0;
|
sock->ops = NULL;
|
sock->ops = NULL;
|
sock->sk = NULL;
|
sock->sk = NULL;
|
sock->file = NULL;
|
sock->file = NULL;
|
|
|
sockets_in_use[smp_processor_id()].counter++;
|
sockets_in_use[smp_processor_id()].counter++;
|
return sock;
|
return sock;
|
}
|
}
|
|
|
/*
|
/*
|
* In theory you can't get an open on this inode, but /proc provides
|
* In theory you can't get an open on this inode, but /proc provides
|
* a back door. Remember to keep it shut otherwise you'll let the
|
* a back door. Remember to keep it shut otherwise you'll let the
|
* creepy crawlies in.
|
* creepy crawlies in.
|
*/
|
*/
|
|
|
static int sock_no_open(struct inode *irrelevant, struct file *dontcare)
|
static int sock_no_open(struct inode *irrelevant, struct file *dontcare)
|
{
|
{
|
return -ENXIO;
|
return -ENXIO;
|
}
|
}
|
|
|
/**
|
/**
|
* sock_release - close a socket
|
* sock_release - close a socket
|
* @sock: socket to close
|
* @sock: socket to close
|
*
|
*
|
* The socket is released from the protocol stack if it has a release
|
* The socket is released from the protocol stack if it has a release
|
* callback, and the inode is then released if the socket is bound to
|
* callback, and the inode is then released if the socket is bound to
|
* an inode not a file.
|
* an inode not a file.
|
*/
|
*/
|
|
|
void sock_release(struct socket *sock)
|
void sock_release(struct socket *sock)
|
{
|
{
|
if (sock->ops)
|
if (sock->ops)
|
sock->ops->release(sock);
|
sock->ops->release(sock);
|
|
|
if (sock->fasync_list)
|
if (sock->fasync_list)
|
printk(KERN_ERR "sock_release: fasync list not empty!\n");
|
printk(KERN_ERR "sock_release: fasync list not empty!\n");
|
|
|
sockets_in_use[smp_processor_id()].counter--;
|
sockets_in_use[smp_processor_id()].counter--;
|
if (!sock->file) {
|
if (!sock->file) {
|
iput(sock->inode);
|
iput(sock->inode);
|
return;
|
return;
|
}
|
}
|
sock->file=NULL;
|
sock->file=NULL;
|
}
|
}
|
|
|
int sock_sendmsg(struct socket *sock, struct msghdr *msg, int size)
|
int sock_sendmsg(struct socket *sock, struct msghdr *msg, int size)
|
{
|
{
|
int err;
|
int err;
|
struct scm_cookie scm;
|
struct scm_cookie scm;
|
|
|
err = scm_send(sock, msg, &scm);
|
err = scm_send(sock, msg, &scm);
|
if (err >= 0) {
|
if (err >= 0) {
|
err = sock->ops->sendmsg(sock, msg, size, &scm);
|
err = sock->ops->sendmsg(sock, msg, size, &scm);
|
scm_destroy(&scm);
|
scm_destroy(&scm);
|
}
|
}
|
return err;
|
return err;
|
}
|
}
|
|
|
int sock_recvmsg(struct socket *sock, struct msghdr *msg, int size, int flags)
|
int sock_recvmsg(struct socket *sock, struct msghdr *msg, int size, int flags)
|
{
|
{
|
struct scm_cookie scm;
|
struct scm_cookie scm;
|
|
|
memset(&scm, 0, sizeof(scm));
|
memset(&scm, 0, sizeof(scm));
|
|
|
size = sock->ops->recvmsg(sock, msg, size, flags, &scm);
|
size = sock->ops->recvmsg(sock, msg, size, flags, &scm);
|
if (size >= 0)
|
if (size >= 0)
|
scm_recv(sock, msg, &scm, flags);
|
scm_recv(sock, msg, &scm, flags);
|
|
|
return size;
|
return size;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* Read data from a socket. ubuf is a user mode pointer. We make sure the user
|
* Read data from a socket. ubuf is a user mode pointer. We make sure the user
|
* area ubuf...ubuf+size-1 is writable before asking the protocol.
|
* area ubuf...ubuf+size-1 is writable before asking the protocol.
|
*/
|
*/
|
|
|
static ssize_t sock_read(struct file *file, char *ubuf,
|
static ssize_t sock_read(struct file *file, char *ubuf,
|
size_t size, loff_t *ppos)
|
size_t size, loff_t *ppos)
|
{
|
{
|
struct socket *sock;
|
struct socket *sock;
|
struct iovec iov;
|
struct iovec iov;
|
struct msghdr msg;
|
struct msghdr msg;
|
int flags;
|
int flags;
|
|
|
if (ppos != &file->f_pos)
|
if (ppos != &file->f_pos)
|
return -ESPIPE;
|
return -ESPIPE;
|
if (size==0) /* Match SYS5 behaviour */
|
if (size==0) /* Match SYS5 behaviour */
|
return 0;
|
return 0;
|
|
|
sock = socki_lookup(file->f_dentry->d_inode);
|
sock = socki_lookup(file->f_dentry->d_inode);
|
|
|
msg.msg_name=NULL;
|
msg.msg_name=NULL;
|
msg.msg_namelen=0;
|
msg.msg_namelen=0;
|
msg.msg_iov=&iov;
|
msg.msg_iov=&iov;
|
msg.msg_iovlen=1;
|
msg.msg_iovlen=1;
|
msg.msg_control=NULL;
|
msg.msg_control=NULL;
|
msg.msg_controllen=0;
|
msg.msg_controllen=0;
|
iov.iov_base=ubuf;
|
iov.iov_base=ubuf;
|
iov.iov_len=size;
|
iov.iov_len=size;
|
flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT;
|
flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT;
|
|
|
return sock_recvmsg(sock, &msg, size, flags);
|
return sock_recvmsg(sock, &msg, size, flags);
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* Write data to a socket. We verify that the user area ubuf..ubuf+size-1
|
* Write data to a socket. We verify that the user area ubuf..ubuf+size-1
|
* is readable by the user process.
|
* is readable by the user process.
|
*/
|
*/
|
|
|
static ssize_t sock_write(struct file *file, const char *ubuf,
|
static ssize_t sock_write(struct file *file, const char *ubuf,
|
size_t size, loff_t *ppos)
|
size_t size, loff_t *ppos)
|
{
|
{
|
struct socket *sock;
|
struct socket *sock;
|
struct msghdr msg;
|
struct msghdr msg;
|
struct iovec iov;
|
struct iovec iov;
|
|
|
if (ppos != &file->f_pos)
|
if (ppos != &file->f_pos)
|
return -ESPIPE;
|
return -ESPIPE;
|
if(size==0) /* Match SYS5 behaviour */
|
if(size==0) /* Match SYS5 behaviour */
|
return 0;
|
return 0;
|
|
|
sock = socki_lookup(file->f_dentry->d_inode);
|
sock = socki_lookup(file->f_dentry->d_inode);
|
|
|
msg.msg_name=NULL;
|
msg.msg_name=NULL;
|
msg.msg_namelen=0;
|
msg.msg_namelen=0;
|
msg.msg_iov=&iov;
|
msg.msg_iov=&iov;
|
msg.msg_iovlen=1;
|
msg.msg_iovlen=1;
|
msg.msg_control=NULL;
|
msg.msg_control=NULL;
|
msg.msg_controllen=0;
|
msg.msg_controllen=0;
|
msg.msg_flags=!(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT;
|
msg.msg_flags=!(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT;
|
if (sock->type == SOCK_SEQPACKET)
|
if (sock->type == SOCK_SEQPACKET)
|
msg.msg_flags |= MSG_EOR;
|
msg.msg_flags |= MSG_EOR;
|
iov.iov_base=(void *)ubuf;
|
iov.iov_base=(void *)ubuf;
|
iov.iov_len=size;
|
iov.iov_len=size;
|
|
|
return sock_sendmsg(sock, &msg, size);
|
return sock_sendmsg(sock, &msg, size);
|
}
|
}
|
|
|
ssize_t sock_sendpage(struct file *file, struct page *page,
|
ssize_t sock_sendpage(struct file *file, struct page *page,
|
int offset, size_t size, loff_t *ppos, int more)
|
int offset, size_t size, loff_t *ppos, int more)
|
{
|
{
|
struct socket *sock;
|
struct socket *sock;
|
int flags;
|
int flags;
|
|
|
if (ppos != &file->f_pos)
|
if (ppos != &file->f_pos)
|
return -ESPIPE;
|
return -ESPIPE;
|
|
|
sock = socki_lookup(file->f_dentry->d_inode);
|
sock = socki_lookup(file->f_dentry->d_inode);
|
|
|
flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT;
|
flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT;
|
if (more)
|
if (more)
|
flags |= MSG_MORE;
|
flags |= MSG_MORE;
|
|
|
return sock->ops->sendpage(sock, page, offset, size, flags);
|
return sock->ops->sendpage(sock, page, offset, size, flags);
|
}
|
}
|
|
|
int sock_readv_writev(int type, struct inode * inode, struct file * file,
|
int sock_readv_writev(int type, struct inode * inode, struct file * file,
|
const struct iovec * iov, long count, long size)
|
const struct iovec * iov, long count, long size)
|
{
|
{
|
struct msghdr msg;
|
struct msghdr msg;
|
struct socket *sock;
|
struct socket *sock;
|
|
|
sock = socki_lookup(inode);
|
sock = socki_lookup(inode);
|
|
|
msg.msg_name = NULL;
|
msg.msg_name = NULL;
|
msg.msg_namelen = 0;
|
msg.msg_namelen = 0;
|
msg.msg_control = NULL;
|
msg.msg_control = NULL;
|
msg.msg_controllen = 0;
|
msg.msg_controllen = 0;
|
msg.msg_iov = (struct iovec *) iov;
|
msg.msg_iov = (struct iovec *) iov;
|
msg.msg_iovlen = count;
|
msg.msg_iovlen = count;
|
msg.msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0;
|
msg.msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0;
|
|
|
/* read() does a VERIFY_WRITE */
|
/* read() does a VERIFY_WRITE */
|
if (type == VERIFY_WRITE)
|
if (type == VERIFY_WRITE)
|
return sock_recvmsg(sock, &msg, size, msg.msg_flags);
|
return sock_recvmsg(sock, &msg, size, msg.msg_flags);
|
|
|
if (sock->type == SOCK_SEQPACKET)
|
if (sock->type == SOCK_SEQPACKET)
|
msg.msg_flags |= MSG_EOR;
|
msg.msg_flags |= MSG_EOR;
|
|
|
return sock_sendmsg(sock, &msg, size);
|
return sock_sendmsg(sock, &msg, size);
|
}
|
}
|
|
|
static ssize_t sock_readv(struct file *file, const struct iovec *vector,
|
static ssize_t sock_readv(struct file *file, const struct iovec *vector,
|
unsigned long count, loff_t *ppos)
|
unsigned long count, loff_t *ppos)
|
{
|
{
|
size_t tot_len = 0;
|
size_t tot_len = 0;
|
int i;
|
int i;
|
for (i = 0 ; i < count ; i++)
|
for (i = 0 ; i < count ; i++)
|
tot_len += vector[i].iov_len;
|
tot_len += vector[i].iov_len;
|
return sock_readv_writev(VERIFY_WRITE, file->f_dentry->d_inode,
|
return sock_readv_writev(VERIFY_WRITE, file->f_dentry->d_inode,
|
file, vector, count, tot_len);
|
file, vector, count, tot_len);
|
}
|
}
|
|
|
static ssize_t sock_writev(struct file *file, const struct iovec *vector,
|
static ssize_t sock_writev(struct file *file, const struct iovec *vector,
|
unsigned long count, loff_t *ppos)
|
unsigned long count, loff_t *ppos)
|
{
|
{
|
size_t tot_len = 0;
|
size_t tot_len = 0;
|
int i;
|
int i;
|
for (i = 0 ; i < count ; i++)
|
for (i = 0 ; i < count ; i++)
|
tot_len += vector[i].iov_len;
|
tot_len += vector[i].iov_len;
|
return sock_readv_writev(VERIFY_READ, file->f_dentry->d_inode,
|
return sock_readv_writev(VERIFY_READ, file->f_dentry->d_inode,
|
file, vector, count, tot_len);
|
file, vector, count, tot_len);
|
}
|
}
|
|
|
/*
|
/*
|
* With an ioctl arg may well be a user mode pointer, but we don't know what to do
|
* With an ioctl arg may well be a user mode pointer, but we don't know what to do
|
* with it - that's up to the protocol still.
|
* with it - that's up to the protocol still.
|
*/
|
*/
|
|
|
int sock_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
|
int sock_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
|
unsigned long arg)
|
unsigned long arg)
|
{
|
{
|
struct socket *sock;
|
struct socket *sock;
|
int err;
|
int err;
|
|
|
unlock_kernel();
|
unlock_kernel();
|
sock = socki_lookup(inode);
|
sock = socki_lookup(inode);
|
err = sock->ops->ioctl(sock, cmd, arg);
|
err = sock->ops->ioctl(sock, cmd, arg);
|
lock_kernel();
|
lock_kernel();
|
|
|
return err;
|
return err;
|
}
|
}
|
|
|
|
|
/* No kernel lock held - perfect */
|
/* No kernel lock held - perfect */
|
static unsigned int sock_poll(struct file *file, poll_table * wait)
|
static unsigned int sock_poll(struct file *file, poll_table * wait)
|
{
|
{
|
struct socket *sock;
|
struct socket *sock;
|
|
|
/*
|
/*
|
* We can't return errors to poll, so it's either yes or no.
|
* We can't return errors to poll, so it's either yes or no.
|
*/
|
*/
|
sock = socki_lookup(file->f_dentry->d_inode);
|
sock = socki_lookup(file->f_dentry->d_inode);
|
return sock->ops->poll(file, sock, wait);
|
return sock->ops->poll(file, sock, wait);
|
}
|
}
|
|
|
static int sock_mmap(struct file * file, struct vm_area_struct * vma)
|
static int sock_mmap(struct file * file, struct vm_area_struct * vma)
|
{
|
{
|
struct socket *sock = socki_lookup(file->f_dentry->d_inode);
|
struct socket *sock = socki_lookup(file->f_dentry->d_inode);
|
|
|
return sock->ops->mmap(file, sock, vma);
|
return sock->ops->mmap(file, sock, vma);
|
}
|
}
|
|
|
int sock_close(struct inode *inode, struct file *filp)
|
int sock_close(struct inode *inode, struct file *filp)
|
{
|
{
|
/*
|
/*
|
* It was possible the inode is NULL we were
|
* It was possible the inode is NULL we were
|
* closing an unfinished socket.
|
* closing an unfinished socket.
|
*/
|
*/
|
|
|
if (!inode)
|
if (!inode)
|
{
|
{
|
printk(KERN_DEBUG "sock_close: NULL inode\n");
|
printk(KERN_DEBUG "sock_close: NULL inode\n");
|
return 0;
|
return 0;
|
}
|
}
|
sock_fasync(-1, filp, 0);
|
sock_fasync(-1, filp, 0);
|
sock_release(socki_lookup(inode));
|
sock_release(socki_lookup(inode));
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* Update the socket async list
|
* Update the socket async list
|
*
|
*
|
* Fasync_list locking strategy.
|
* Fasync_list locking strategy.
|
*
|
*
|
* 1. fasync_list is modified only under process context socket lock
|
* 1. fasync_list is modified only under process context socket lock
|
* i.e. under semaphore.
|
* i.e. under semaphore.
|
* 2. fasync_list is used under read_lock(&sk->callback_lock)
|
* 2. fasync_list is used under read_lock(&sk->callback_lock)
|
* or under socket lock.
|
* or under socket lock.
|
* 3. fasync_list can be used from softirq context, so that
|
* 3. fasync_list can be used from softirq context, so that
|
* modification under socket lock have to be enhanced with
|
* modification under socket lock have to be enhanced with
|
* write_lock_bh(&sk->callback_lock).
|
* write_lock_bh(&sk->callback_lock).
|
* --ANK (990710)
|
* --ANK (990710)
|
*/
|
*/
|
|
|
static int sock_fasync(int fd, struct file *filp, int on)
|
static int sock_fasync(int fd, struct file *filp, int on)
|
{
|
{
|
struct fasync_struct *fa, *fna=NULL, **prev;
|
struct fasync_struct *fa, *fna=NULL, **prev;
|
struct socket *sock;
|
struct socket *sock;
|
struct sock *sk;
|
struct sock *sk;
|
|
|
if (on)
|
if (on)
|
{
|
{
|
fna=(struct fasync_struct *)kmalloc(sizeof(struct fasync_struct), GFP_KERNEL);
|
fna=(struct fasync_struct *)kmalloc(sizeof(struct fasync_struct), GFP_KERNEL);
|
if(fna==NULL)
|
if(fna==NULL)
|
return -ENOMEM;
|
return -ENOMEM;
|
}
|
}
|
|
|
sock = socki_lookup(filp->f_dentry->d_inode);
|
sock = socki_lookup(filp->f_dentry->d_inode);
|
|
|
if ((sk=sock->sk) == NULL) {
|
if ((sk=sock->sk) == NULL) {
|
if (fna)
|
if (fna)
|
kfree(fna);
|
kfree(fna);
|
return -EINVAL;
|
return -EINVAL;
|
}
|
}
|
|
|
lock_sock(sk);
|
lock_sock(sk);
|
|
|
prev=&(sock->fasync_list);
|
prev=&(sock->fasync_list);
|
|
|
for (fa=*prev; fa!=NULL; prev=&fa->fa_next,fa=*prev)
|
for (fa=*prev; fa!=NULL; prev=&fa->fa_next,fa=*prev)
|
if (fa->fa_file==filp)
|
if (fa->fa_file==filp)
|
break;
|
break;
|
|
|
if(on)
|
if(on)
|
{
|
{
|
if(fa!=NULL)
|
if(fa!=NULL)
|
{
|
{
|
write_lock_bh(&sk->callback_lock);
|
write_lock_bh(&sk->callback_lock);
|
fa->fa_fd=fd;
|
fa->fa_fd=fd;
|
write_unlock_bh(&sk->callback_lock);
|
write_unlock_bh(&sk->callback_lock);
|
|
|
kfree(fna);
|
kfree(fna);
|
goto out;
|
goto out;
|
}
|
}
|
fna->fa_file=filp;
|
fna->fa_file=filp;
|
fna->fa_fd=fd;
|
fna->fa_fd=fd;
|
fna->magic=FASYNC_MAGIC;
|
fna->magic=FASYNC_MAGIC;
|
fna->fa_next=sock->fasync_list;
|
fna->fa_next=sock->fasync_list;
|
write_lock_bh(&sk->callback_lock);
|
write_lock_bh(&sk->callback_lock);
|
sock->fasync_list=fna;
|
sock->fasync_list=fna;
|
write_unlock_bh(&sk->callback_lock);
|
write_unlock_bh(&sk->callback_lock);
|
}
|
}
|
else
|
else
|
{
|
{
|
if (fa!=NULL)
|
if (fa!=NULL)
|
{
|
{
|
write_lock_bh(&sk->callback_lock);
|
write_lock_bh(&sk->callback_lock);
|
*prev=fa->fa_next;
|
*prev=fa->fa_next;
|
write_unlock_bh(&sk->callback_lock);
|
write_unlock_bh(&sk->callback_lock);
|
kfree(fa);
|
kfree(fa);
|
}
|
}
|
}
|
}
|
|
|
out:
|
out:
|
release_sock(sock->sk);
|
release_sock(sock->sk);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* This function may be called only under socket lock or callback_lock */
|
/* This function may be called only under socket lock or callback_lock */
|
|
|
int sock_wake_async(struct socket *sock, int how, int band)
|
int sock_wake_async(struct socket *sock, int how, int band)
|
{
|
{
|
if (!sock || !sock->fasync_list)
|
if (!sock || !sock->fasync_list)
|
return -1;
|
return -1;
|
switch (how)
|
switch (how)
|
{
|
{
|
case 1:
|
case 1:
|
|
|
if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags))
|
if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags))
|
break;
|
break;
|
goto call_kill;
|
goto call_kill;
|
case 2:
|
case 2:
|
if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags))
|
if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags))
|
break;
|
break;
|
/* fall through */
|
/* fall through */
|
case 0:
|
case 0:
|
call_kill:
|
call_kill:
|
__kill_fasync(sock->fasync_list, SIGIO, band);
|
__kill_fasync(sock->fasync_list, SIGIO, band);
|
break;
|
break;
|
case 3:
|
case 3:
|
__kill_fasync(sock->fasync_list, SIGURG, band);
|
__kill_fasync(sock->fasync_list, SIGURG, band);
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
|
int sock_create(int family, int type, int protocol, struct socket **res)
|
int sock_create(int family, int type, int protocol, struct socket **res)
|
{
|
{
|
int i;
|
int i;
|
struct socket *sock;
|
struct socket *sock;
|
|
|
/*
|
/*
|
* Check protocol is in range
|
* Check protocol is in range
|
*/
|
*/
|
if (family < 0 || family >= NPROTO)
|
if (family < 0 || family >= NPROTO)
|
return -EAFNOSUPPORT;
|
return -EAFNOSUPPORT;
|
if (type < 0 || type >= SOCK_MAX)
|
if (type < 0 || type >= SOCK_MAX)
|
return -EINVAL;
|
return -EINVAL;
|
|
|
/* Compatibility.
|
/* Compatibility.
|
|
|
This uglymoron is moved from INET layer to here to avoid
|
This uglymoron is moved from INET layer to here to avoid
|
deadlock in module load.
|
deadlock in module load.
|
*/
|
*/
|
if (family == PF_INET && type == SOCK_PACKET) {
|
if (family == PF_INET && type == SOCK_PACKET) {
|
static int warned;
|
static int warned;
|
if (!warned) {
|
if (!warned) {
|
warned = 1;
|
warned = 1;
|
printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", current->comm);
|
printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", current->comm);
|
}
|
}
|
family = PF_PACKET;
|
family = PF_PACKET;
|
}
|
}
|
|
|
#if defined(CONFIG_KMOD) && defined(CONFIG_NET)
|
#if defined(CONFIG_KMOD) && defined(CONFIG_NET)
|
/* Attempt to load a protocol module if the find failed.
|
/* Attempt to load a protocol module if the find failed.
|
*
|
*
|
* 12/09/1996 Marcin: But! this makes REALLY only sense, if the user
|
* 12/09/1996 Marcin: But! this makes REALLY only sense, if the user
|
* requested real, full-featured networking support upon configuration.
|
* requested real, full-featured networking support upon configuration.
|
* Otherwise module support will break!
|
* Otherwise module support will break!
|
*/
|
*/
|
if (net_families[family]==NULL)
|
if (net_families[family]==NULL)
|
{
|
{
|
char module_name[30];
|
char module_name[30];
|
sprintf(module_name,"net-pf-%d",family);
|
sprintf(module_name,"net-pf-%d",family);
|
request_module(module_name);
|
request_module(module_name);
|
}
|
}
|
#endif
|
#endif
|
|
|
net_family_read_lock();
|
net_family_read_lock();
|
if (net_families[family] == NULL) {
|
if (net_families[family] == NULL) {
|
i = -EAFNOSUPPORT;
|
i = -EAFNOSUPPORT;
|
goto out;
|
goto out;
|
}
|
}
|
|
|
/*
|
/*
|
* Allocate the socket and allow the family to set things up. if
|
* Allocate the socket and allow the family to set things up. if
|
* the protocol is 0, the family is instructed to select an appropriate
|
* the protocol is 0, the family is instructed to select an appropriate
|
* default.
|
* default.
|
*/
|
*/
|
|
|
if (!(sock = sock_alloc()))
|
if (!(sock = sock_alloc()))
|
{
|
{
|
printk(KERN_WARNING "socket: no more sockets\n");
|
printk(KERN_WARNING "socket: no more sockets\n");
|
i = -ENFILE; /* Not exactly a match, but its the
|
i = -ENFILE; /* Not exactly a match, but its the
|
closest posix thing */
|
closest posix thing */
|
goto out;
|
goto out;
|
}
|
}
|
|
|
sock->type = type;
|
sock->type = type;
|
|
|
if ((i = net_families[family]->create(sock, protocol)) < 0)
|
if ((i = net_families[family]->create(sock, protocol)) < 0)
|
{
|
{
|
sock_release(sock);
|
sock_release(sock);
|
goto out;
|
goto out;
|
}
|
}
|
|
|
*res = sock;
|
*res = sock;
|
|
|
out:
|
out:
|
net_family_read_unlock();
|
net_family_read_unlock();
|
return i;
|
return i;
|
}
|
}
|
|
|
asmlinkage long sys_socket(int family, int type, int protocol)
|
asmlinkage long sys_socket(int family, int type, int protocol)
|
{
|
{
|
int retval;
|
int retval;
|
struct socket *sock;
|
struct socket *sock;
|
|
|
retval = sock_create(family, type, protocol, &sock);
|
retval = sock_create(family, type, protocol, &sock);
|
if (retval < 0)
|
if (retval < 0)
|
goto out;
|
goto out;
|
|
|
retval = sock_map_fd(sock);
|
retval = sock_map_fd(sock);
|
if (retval < 0)
|
if (retval < 0)
|
goto out_release;
|
goto out_release;
|
|
|
out:
|
out:
|
/* It may be already another descriptor 8) Not kernel problem. */
|
/* It may be already another descriptor 8) Not kernel problem. */
|
return retval;
|
return retval;
|
|
|
out_release:
|
out_release:
|
sock_release(sock);
|
sock_release(sock);
|
return retval;
|
return retval;
|
}
|
}
|
|
|
/*
|
/*
|
* Create a pair of connected sockets.
|
* Create a pair of connected sockets.
|
*/
|
*/
|
|
|
asmlinkage long sys_socketpair(int family, int type, int protocol, int usockvec[2])
|
asmlinkage long sys_socketpair(int family, int type, int protocol, int usockvec[2])
|
{
|
{
|
struct socket *sock1, *sock2;
|
struct socket *sock1, *sock2;
|
int fd1, fd2, err;
|
int fd1, fd2, err;
|
|
|
/*
|
/*
|
* Obtain the first socket and check if the underlying protocol
|
* Obtain the first socket and check if the underlying protocol
|
* supports the socketpair call.
|
* supports the socketpair call.
|
*/
|
*/
|
|
|
err = sock_create(family, type, protocol, &sock1);
|
err = sock_create(family, type, protocol, &sock1);
|
if (err < 0)
|
if (err < 0)
|
goto out;
|
goto out;
|
|
|
err = sock_create(family, type, protocol, &sock2);
|
err = sock_create(family, type, protocol, &sock2);
|
if (err < 0)
|
if (err < 0)
|
goto out_release_1;
|
goto out_release_1;
|
|
|
err = sock1->ops->socketpair(sock1, sock2);
|
err = sock1->ops->socketpair(sock1, sock2);
|
if (err < 0)
|
if (err < 0)
|
goto out_release_both;
|
goto out_release_both;
|
|
|
fd1 = fd2 = -1;
|
fd1 = fd2 = -1;
|
|
|
err = sock_map_fd(sock1);
|
err = sock_map_fd(sock1);
|
if (err < 0)
|
if (err < 0)
|
goto out_release_both;
|
goto out_release_both;
|
fd1 = err;
|
fd1 = err;
|
|
|
err = sock_map_fd(sock2);
|
err = sock_map_fd(sock2);
|
if (err < 0)
|
if (err < 0)
|
goto out_close_1;
|
goto out_close_1;
|
fd2 = err;
|
fd2 = err;
|
|
|
/* fd1 and fd2 may be already another descriptors.
|
/* fd1 and fd2 may be already another descriptors.
|
* Not kernel problem.
|
* Not kernel problem.
|
*/
|
*/
|
|
|
err = put_user(fd1, &usockvec[0]);
|
err = put_user(fd1, &usockvec[0]);
|
if (!err)
|
if (!err)
|
err = put_user(fd2, &usockvec[1]);
|
err = put_user(fd2, &usockvec[1]);
|
if (!err)
|
if (!err)
|
return 0;
|
return 0;
|
|
|
sys_close(fd2);
|
sys_close(fd2);
|
sys_close(fd1);
|
sys_close(fd1);
|
return err;
|
return err;
|
|
|
out_close_1:
|
out_close_1:
|
sock_release(sock2);
|
sock_release(sock2);
|
sys_close(fd1);
|
sys_close(fd1);
|
return err;
|
return err;
|
|
|
out_release_both:
|
out_release_both:
|
sock_release(sock2);
|
sock_release(sock2);
|
out_release_1:
|
out_release_1:
|
sock_release(sock1);
|
sock_release(sock1);
|
out:
|
out:
|
return err;
|
return err;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* Bind a name to a socket. Nothing much to do here since it's
|
* Bind a name to a socket. Nothing much to do here since it's
|
* the protocol's responsibility to handle the local address.
|
* the protocol's responsibility to handle the local address.
|
*
|
*
|
* We move the socket address to kernel space before we call
|
* We move the socket address to kernel space before we call
|
* the protocol layer (having also checked the address is ok).
|
* the protocol layer (having also checked the address is ok).
|
*/
|
*/
|
|
|
asmlinkage long sys_bind(int fd, struct sockaddr *umyaddr, int addrlen)
|
asmlinkage long sys_bind(int fd, struct sockaddr *umyaddr, int addrlen)
|
{
|
{
|
struct socket *sock;
|
struct socket *sock;
|
char address[MAX_SOCK_ADDR];
|
char address[MAX_SOCK_ADDR];
|
int err;
|
int err;
|
|
|
if((sock = sockfd_lookup(fd,&err))!=NULL)
|
if((sock = sockfd_lookup(fd,&err))!=NULL)
|
{
|
{
|
if((err=move_addr_to_kernel(umyaddr,addrlen,address))>=0)
|
if((err=move_addr_to_kernel(umyaddr,addrlen,address))>=0)
|
err = sock->ops->bind(sock, (struct sockaddr *)address, addrlen);
|
err = sock->ops->bind(sock, (struct sockaddr *)address, addrlen);
|
sockfd_put(sock);
|
sockfd_put(sock);
|
}
|
}
|
return err;
|
return err;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* Perform a listen. Basically, we allow the protocol to do anything
|
* Perform a listen. Basically, we allow the protocol to do anything
|
* necessary for a listen, and if that works, we mark the socket as
|
* necessary for a listen, and if that works, we mark the socket as
|
* ready for listening.
|
* ready for listening.
|
*/
|
*/
|
|
|
int sysctl_somaxconn = SOMAXCONN;
|
int sysctl_somaxconn = SOMAXCONN;
|
|
|
asmlinkage long sys_listen(int fd, int backlog)
|
asmlinkage long sys_listen(int fd, int backlog)
|
{
|
{
|
struct socket *sock;
|
struct socket *sock;
|
int err;
|
int err;
|
|
|
if ((sock = sockfd_lookup(fd, &err)) != NULL) {
|
if ((sock = sockfd_lookup(fd, &err)) != NULL) {
|
if ((unsigned) backlog > sysctl_somaxconn)
|
if ((unsigned) backlog > sysctl_somaxconn)
|
backlog = sysctl_somaxconn;
|
backlog = sysctl_somaxconn;
|
err=sock->ops->listen(sock, backlog);
|
err=sock->ops->listen(sock, backlog);
|
sockfd_put(sock);
|
sockfd_put(sock);
|
}
|
}
|
return err;
|
return err;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* For accept, we attempt to create a new socket, set up the link
|
* For accept, we attempt to create a new socket, set up the link
|
* with the client, wake up the client, then return the new
|
* with the client, wake up the client, then return the new
|
* connected fd. We collect the address of the connector in kernel
|
* connected fd. We collect the address of the connector in kernel
|
* space and move it to user at the very end. This is unclean because
|
* space and move it to user at the very end. This is unclean because
|
* we open the socket then return an error.
|
* we open the socket then return an error.
|
*
|
*
|
* 1003.1g adds the ability to recvmsg() to query connection pending
|
* 1003.1g adds the ability to recvmsg() to query connection pending
|
* status to recvmsg. We need to add that support in a way thats
|
* status to recvmsg. We need to add that support in a way thats
|
* clean when we restucture accept also.
|
* clean when we restucture accept also.
|
*/
|
*/
|
|
|
asmlinkage long sys_accept(int fd, struct sockaddr *upeer_sockaddr, int *upeer_addrlen)
|
asmlinkage long sys_accept(int fd, struct sockaddr *upeer_sockaddr, int *upeer_addrlen)
|
{
|
{
|
struct socket *sock, *newsock;
|
struct socket *sock, *newsock;
|
int err, len;
|
int err, len;
|
char address[MAX_SOCK_ADDR];
|
char address[MAX_SOCK_ADDR];
|
|
|
sock = sockfd_lookup(fd, &err);
|
sock = sockfd_lookup(fd, &err);
|
if (!sock)
|
if (!sock)
|
goto out;
|
goto out;
|
|
|
err = -EMFILE;
|
err = -EMFILE;
|
if (!(newsock = sock_alloc()))
|
if (!(newsock = sock_alloc()))
|
goto out_put;
|
goto out_put;
|
|
|
newsock->type = sock->type;
|
newsock->type = sock->type;
|
newsock->ops = sock->ops;
|
newsock->ops = sock->ops;
|
|
|
err = sock->ops->accept(sock, newsock, sock->file->f_flags);
|
err = sock->ops->accept(sock, newsock, sock->file->f_flags);
|
if (err < 0)
|
if (err < 0)
|
goto out_release;
|
goto out_release;
|
|
|
if (upeer_sockaddr) {
|
if (upeer_sockaddr) {
|
if(newsock->ops->getname(newsock, (struct sockaddr *)address, &len, 2)<0) {
|
if(newsock->ops->getname(newsock, (struct sockaddr *)address, &len, 2)<0) {
|
err = -ECONNABORTED;
|
err = -ECONNABORTED;
|
goto out_release;
|
goto out_release;
|
}
|
}
|
err = move_addr_to_user(address, len, upeer_sockaddr, upeer_addrlen);
|
err = move_addr_to_user(address, len, upeer_sockaddr, upeer_addrlen);
|
if (err < 0)
|
if (err < 0)
|
goto out_release;
|
goto out_release;
|
}
|
}
|
|
|
/* File flags are not inherited via accept() unlike another OSes. */
|
/* File flags are not inherited via accept() unlike another OSes. */
|
|
|
if ((err = sock_map_fd(newsock)) < 0)
|
if ((err = sock_map_fd(newsock)) < 0)
|
goto out_release;
|
goto out_release;
|
|
|
out_put:
|
out_put:
|
sockfd_put(sock);
|
sockfd_put(sock);
|
out:
|
out:
|
return err;
|
return err;
|
|
|
out_release:
|
out_release:
|
sock_release(newsock);
|
sock_release(newsock);
|
goto out_put;
|
goto out_put;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* Attempt to connect to a socket with the server address. The address
|
* Attempt to connect to a socket with the server address. The address
|
* is in user space so we verify it is OK and move it to kernel space.
|
* is in user space so we verify it is OK and move it to kernel space.
|
*
|
*
|
* For 1003.1g we need to add clean support for a bind to AF_UNSPEC to
|
* For 1003.1g we need to add clean support for a bind to AF_UNSPEC to
|
* break bindings
|
* break bindings
|
*
|
*
|
* NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and
|
* NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and
|
* other SEQPACKET protocols that take time to connect() as it doesn't
|
* other SEQPACKET protocols that take time to connect() as it doesn't
|
* include the -EINPROGRESS status for such sockets.
|
* include the -EINPROGRESS status for such sockets.
|
*/
|
*/
|
|
|
asmlinkage long sys_connect(int fd, struct sockaddr *uservaddr, int addrlen)
|
asmlinkage long sys_connect(int fd, struct sockaddr *uservaddr, int addrlen)
|
{
|
{
|
struct socket *sock;
|
struct socket *sock;
|
char address[MAX_SOCK_ADDR];
|
char address[MAX_SOCK_ADDR];
|
int err;
|
int err;
|
|
|
sock = sockfd_lookup(fd, &err);
|
sock = sockfd_lookup(fd, &err);
|
if (!sock)
|
if (!sock)
|
goto out;
|
goto out;
|
err = move_addr_to_kernel(uservaddr, addrlen, address);
|
err = move_addr_to_kernel(uservaddr, addrlen, address);
|
if (err < 0)
|
if (err < 0)
|
goto out_put;
|
goto out_put;
|
err = sock->ops->connect(sock, (struct sockaddr *) address, addrlen,
|
err = sock->ops->connect(sock, (struct sockaddr *) address, addrlen,
|
sock->file->f_flags);
|
sock->file->f_flags);
|
out_put:
|
out_put:
|
sockfd_put(sock);
|
sockfd_put(sock);
|
out:
|
out:
|
return err;
|
return err;
|
}
|
}
|
|
|
/*
|
/*
|
* Get the local address ('name') of a socket object. Move the obtained
|
* Get the local address ('name') of a socket object. Move the obtained
|
* name to user space.
|
* name to user space.
|
*/
|
*/
|
|
|
asmlinkage long sys_getsockname(int fd, struct sockaddr *usockaddr, int *usockaddr_len)
|
asmlinkage long sys_getsockname(int fd, struct sockaddr *usockaddr, int *usockaddr_len)
|
{
|
{
|
struct socket *sock;
|
struct socket *sock;
|
char address[MAX_SOCK_ADDR];
|
char address[MAX_SOCK_ADDR];
|
int len, err;
|
int len, err;
|
|
|
sock = sockfd_lookup(fd, &err);
|
sock = sockfd_lookup(fd, &err);
|
if (!sock)
|
if (!sock)
|
goto out;
|
goto out;
|
err = sock->ops->getname(sock, (struct sockaddr *)address, &len, 0);
|
err = sock->ops->getname(sock, (struct sockaddr *)address, &len, 0);
|
if (err)
|
if (err)
|
goto out_put;
|
goto out_put;
|
err = move_addr_to_user(address, len, usockaddr, usockaddr_len);
|
err = move_addr_to_user(address, len, usockaddr, usockaddr_len);
|
|
|
out_put:
|
out_put:
|
sockfd_put(sock);
|
sockfd_put(sock);
|
out:
|
out:
|
return err;
|
return err;
|
}
|
}
|
|
|
/*
|
/*
|
* Get the remote address ('name') of a socket object. Move the obtained
|
* Get the remote address ('name') of a socket object. Move the obtained
|
* name to user space.
|
* name to user space.
|
*/
|
*/
|
|
|
asmlinkage long sys_getpeername(int fd, struct sockaddr *usockaddr, int *usockaddr_len)
|
asmlinkage long sys_getpeername(int fd, struct sockaddr *usockaddr, int *usockaddr_len)
|
{
|
{
|
struct socket *sock;
|
struct socket *sock;
|
char address[MAX_SOCK_ADDR];
|
char address[MAX_SOCK_ADDR];
|
int len, err;
|
int len, err;
|
|
|
if ((sock = sockfd_lookup(fd, &err))!=NULL)
|
if ((sock = sockfd_lookup(fd, &err))!=NULL)
|
{
|
{
|
err = sock->ops->getname(sock, (struct sockaddr *)address, &len, 1);
|
err = sock->ops->getname(sock, (struct sockaddr *)address, &len, 1);
|
if (!err)
|
if (!err)
|
err=move_addr_to_user(address,len, usockaddr, usockaddr_len);
|
err=move_addr_to_user(address,len, usockaddr, usockaddr_len);
|
sockfd_put(sock);
|
sockfd_put(sock);
|
}
|
}
|
return err;
|
return err;
|
}
|
}
|
|
|
/*
|
/*
|
* Send a datagram to a given address. We move the address into kernel
|
* Send a datagram to a given address. We move the address into kernel
|
* space and check the user space data area is readable before invoking
|
* space and check the user space data area is readable before invoking
|
* the protocol.
|
* the protocol.
|
*/
|
*/
|
|
|
asmlinkage long sys_sendto(int fd, void * buff, size_t len, unsigned flags,
|
asmlinkage long sys_sendto(int fd, void * buff, size_t len, unsigned flags,
|
struct sockaddr *addr, int addr_len)
|
struct sockaddr *addr, int addr_len)
|
{
|
{
|
struct socket *sock;
|
struct socket *sock;
|
char address[MAX_SOCK_ADDR];
|
char address[MAX_SOCK_ADDR];
|
int err;
|
int err;
|
struct msghdr msg;
|
struct msghdr msg;
|
struct iovec iov;
|
struct iovec iov;
|
|
|
sock = sockfd_lookup(fd, &err);
|
sock = sockfd_lookup(fd, &err);
|
if (!sock)
|
if (!sock)
|
goto out;
|
goto out;
|
iov.iov_base=buff;
|
iov.iov_base=buff;
|
iov.iov_len=len;
|
iov.iov_len=len;
|
msg.msg_name=NULL;
|
msg.msg_name=NULL;
|
msg.msg_iov=&iov;
|
msg.msg_iov=&iov;
|
msg.msg_iovlen=1;
|
msg.msg_iovlen=1;
|
msg.msg_control=NULL;
|
msg.msg_control=NULL;
|
msg.msg_controllen=0;
|
msg.msg_controllen=0;
|
msg.msg_namelen=0;
|
msg.msg_namelen=0;
|
if(addr)
|
if(addr)
|
{
|
{
|
err = move_addr_to_kernel(addr, addr_len, address);
|
err = move_addr_to_kernel(addr, addr_len, address);
|
if (err < 0)
|
if (err < 0)
|
goto out_put;
|
goto out_put;
|
msg.msg_name=address;
|
msg.msg_name=address;
|
msg.msg_namelen=addr_len;
|
msg.msg_namelen=addr_len;
|
}
|
}
|
if (sock->file->f_flags & O_NONBLOCK)
|
if (sock->file->f_flags & O_NONBLOCK)
|
flags |= MSG_DONTWAIT;
|
flags |= MSG_DONTWAIT;
|
msg.msg_flags = flags;
|
msg.msg_flags = flags;
|
err = sock_sendmsg(sock, &msg, len);
|
err = sock_sendmsg(sock, &msg, len);
|
|
|
out_put:
|
out_put:
|
sockfd_put(sock);
|
sockfd_put(sock);
|
out:
|
out:
|
return err;
|
return err;
|
}
|
}
|
|
|
/*
|
/*
|
* Send a datagram down a socket.
|
* Send a datagram down a socket.
|
*/
|
*/
|
|
|
asmlinkage long sys_send(int fd, void * buff, size_t len, unsigned flags)
|
asmlinkage long sys_send(int fd, void * buff, size_t len, unsigned flags)
|
{
|
{
|
return sys_sendto(fd, buff, len, flags, NULL, 0);
|
return sys_sendto(fd, buff, len, flags, NULL, 0);
|
}
|
}
|
|
|
/*
|
/*
|
* Receive a frame from the socket and optionally record the address of the
|
* Receive a frame from the socket and optionally record the address of the
|
* sender. We verify the buffers are writable and if needed move the
|
* sender. We verify the buffers are writable and if needed move the
|
* sender address from kernel to user space.
|
* sender address from kernel to user space.
|
*/
|
*/
|
|
|
asmlinkage long sys_recvfrom(int fd, void * ubuf, size_t size, unsigned flags,
|
asmlinkage long sys_recvfrom(int fd, void * ubuf, size_t size, unsigned flags,
|
struct sockaddr *addr, int *addr_len)
|
struct sockaddr *addr, int *addr_len)
|
{
|
{
|
struct socket *sock;
|
struct socket *sock;
|
struct iovec iov;
|
struct iovec iov;
|
struct msghdr msg;
|
struct msghdr msg;
|
char address[MAX_SOCK_ADDR];
|
char address[MAX_SOCK_ADDR];
|
int err,err2;
|
int err,err2;
|
|
|
sock = sockfd_lookup(fd, &err);
|
sock = sockfd_lookup(fd, &err);
|
if (!sock)
|
if (!sock)
|
goto out;
|
goto out;
|
|
|
msg.msg_control=NULL;
|
msg.msg_control=NULL;
|
msg.msg_controllen=0;
|
msg.msg_controllen=0;
|
msg.msg_iovlen=1;
|
msg.msg_iovlen=1;
|
msg.msg_iov=&iov;
|
msg.msg_iov=&iov;
|
iov.iov_len=size;
|
iov.iov_len=size;
|
iov.iov_base=ubuf;
|
iov.iov_base=ubuf;
|
msg.msg_name=address;
|
msg.msg_name=address;
|
msg.msg_namelen=MAX_SOCK_ADDR;
|
msg.msg_namelen=MAX_SOCK_ADDR;
|
if (sock->file->f_flags & O_NONBLOCK)
|
if (sock->file->f_flags & O_NONBLOCK)
|
flags |= MSG_DONTWAIT;
|
flags |= MSG_DONTWAIT;
|
err=sock_recvmsg(sock, &msg, size, flags);
|
err=sock_recvmsg(sock, &msg, size, flags);
|
|
|
if(err >= 0 && addr != NULL)
|
if(err >= 0 && addr != NULL)
|
{
|
{
|
err2=move_addr_to_user(address, msg.msg_namelen, addr, addr_len);
|
err2=move_addr_to_user(address, msg.msg_namelen, addr, addr_len);
|
if(err2<0)
|
if(err2<0)
|
err=err2;
|
err=err2;
|
}
|
}
|
sockfd_put(sock);
|
sockfd_put(sock);
|
out:
|
out:
|
return err;
|
return err;
|
}
|
}
|
|
|
/*
|
/*
|
* Receive a datagram from a socket.
|
* Receive a datagram from a socket.
|
*/
|
*/
|
|
|
asmlinkage long sys_recv(int fd, void * ubuf, size_t size, unsigned flags)
|
asmlinkage long sys_recv(int fd, void * ubuf, size_t size, unsigned flags)
|
{
|
{
|
return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL);
|
return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL);
|
}
|
}
|
|
|
/*
|
/*
|
* Set a socket option. Because we don't know the option lengths we have
|
* Set a socket option. Because we don't know the option lengths we have
|
* to pass the user mode parameter for the protocols to sort out.
|
* to pass the user mode parameter for the protocols to sort out.
|
*/
|
*/
|
|
|
asmlinkage long sys_setsockopt(int fd, int level, int optname, char *optval, int optlen)
|
asmlinkage long sys_setsockopt(int fd, int level, int optname, char *optval, int optlen)
|
{
|
{
|
int err;
|
int err;
|
struct socket *sock;
|
struct socket *sock;
|
|
|
if (optlen < 0)
|
if (optlen < 0)
|
return -EINVAL;
|
return -EINVAL;
|
|
|
if ((sock = sockfd_lookup(fd, &err))!=NULL)
|
if ((sock = sockfd_lookup(fd, &err))!=NULL)
|
{
|
{
|
if (level == SOL_SOCKET)
|
if (level == SOL_SOCKET)
|
err=sock_setsockopt(sock,level,optname,optval,optlen);
|
err=sock_setsockopt(sock,level,optname,optval,optlen);
|
else
|
else
|
err=sock->ops->setsockopt(sock, level, optname, optval, optlen);
|
err=sock->ops->setsockopt(sock, level, optname, optval, optlen);
|
sockfd_put(sock);
|
sockfd_put(sock);
|
}
|
}
|
return err;
|
return err;
|
}
|
}
|
|
|
/*
|
/*
|
* Get a socket option. Because we don't know the option lengths we have
|
* Get a socket option. Because we don't know the option lengths we have
|
* to pass a user mode parameter for the protocols to sort out.
|
* to pass a user mode parameter for the protocols to sort out.
|
*/
|
*/
|
|
|
asmlinkage long sys_getsockopt(int fd, int level, int optname, char *optval, int *optlen)
|
asmlinkage long sys_getsockopt(int fd, int level, int optname, char *optval, int *optlen)
|
{
|
{
|
int err;
|
int err;
|
struct socket *sock;
|
struct socket *sock;
|
|
|
if ((sock = sockfd_lookup(fd, &err))!=NULL)
|
if ((sock = sockfd_lookup(fd, &err))!=NULL)
|
{
|
{
|
if (level == SOL_SOCKET)
|
if (level == SOL_SOCKET)
|
err=sock_getsockopt(sock,level,optname,optval,optlen);
|
err=sock_getsockopt(sock,level,optname,optval,optlen);
|
else
|
else
|
err=sock->ops->getsockopt(sock, level, optname, optval, optlen);
|
err=sock->ops->getsockopt(sock, level, optname, optval, optlen);
|
sockfd_put(sock);
|
sockfd_put(sock);
|
}
|
}
|
return err;
|
return err;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* Shutdown a socket.
|
* Shutdown a socket.
|
*/
|
*/
|
|
|
asmlinkage long sys_shutdown(int fd, int how)
|
asmlinkage long sys_shutdown(int fd, int how)
|
{
|
{
|
int err;
|
int err;
|
struct socket *sock;
|
struct socket *sock;
|
|
|
if ((sock = sockfd_lookup(fd, &err))!=NULL)
|
if ((sock = sockfd_lookup(fd, &err))!=NULL)
|
{
|
{
|
err=sock->ops->shutdown(sock, how);
|
err=sock->ops->shutdown(sock, how);
|
sockfd_put(sock);
|
sockfd_put(sock);
|
}
|
}
|
return err;
|
return err;
|
}
|
}
|
|
|
/*
|
/*
|
* BSD sendmsg interface
|
* BSD sendmsg interface
|
*/
|
*/
|
|
|
asmlinkage long sys_sendmsg(int fd, struct msghdr *msg, unsigned flags)
|
asmlinkage long sys_sendmsg(int fd, struct msghdr *msg, unsigned flags)
|
{
|
{
|
struct socket *sock;
|
struct socket *sock;
|
char address[MAX_SOCK_ADDR];
|
char address[MAX_SOCK_ADDR];
|
struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
|
struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
|
unsigned char ctl[sizeof(struct cmsghdr) + 20]; /* 20 is size of ipv6_pktinfo */
|
unsigned char ctl[sizeof(struct cmsghdr) + 20]; /* 20 is size of ipv6_pktinfo */
|
unsigned char *ctl_buf = ctl;
|
unsigned char *ctl_buf = ctl;
|
struct msghdr msg_sys;
|
struct msghdr msg_sys;
|
int err, ctl_len, iov_size, total_len;
|
int err, ctl_len, iov_size, total_len;
|
|
|
err = -EFAULT;
|
err = -EFAULT;
|
if (copy_from_user(&msg_sys,msg,sizeof(struct msghdr)))
|
if (copy_from_user(&msg_sys,msg,sizeof(struct msghdr)))
|
goto out;
|
goto out;
|
|
|
sock = sockfd_lookup(fd, &err);
|
sock = sockfd_lookup(fd, &err);
|
if (!sock)
|
if (!sock)
|
goto out;
|
goto out;
|
|
|
/* do not move before msg_sys is valid */
|
/* do not move before msg_sys is valid */
|
err = -EMSGSIZE;
|
err = -EMSGSIZE;
|
if (msg_sys.msg_iovlen > UIO_MAXIOV)
|
if (msg_sys.msg_iovlen > UIO_MAXIOV)
|
goto out_put;
|
goto out_put;
|
|
|
/* Check whether to allocate the iovec area*/
|
/* Check whether to allocate the iovec area*/
|
err = -ENOMEM;
|
err = -ENOMEM;
|
iov_size = msg_sys.msg_iovlen * sizeof(struct iovec);
|
iov_size = msg_sys.msg_iovlen * sizeof(struct iovec);
|
if (msg_sys.msg_iovlen > UIO_FASTIOV) {
|
if (msg_sys.msg_iovlen > UIO_FASTIOV) {
|
iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL);
|
iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL);
|
if (!iov)
|
if (!iov)
|
goto out_put;
|
goto out_put;
|
}
|
}
|
|
|
/* This will also move the address data into kernel space */
|
/* This will also move the address data into kernel space */
|
err = verify_iovec(&msg_sys, iov, address, VERIFY_READ);
|
err = verify_iovec(&msg_sys, iov, address, VERIFY_READ);
|
if (err < 0)
|
if (err < 0)
|
goto out_freeiov;
|
goto out_freeiov;
|
total_len = err;
|
total_len = err;
|
|
|
err = -ENOBUFS;
|
err = -ENOBUFS;
|
|
|
if (msg_sys.msg_controllen > INT_MAX)
|
if (msg_sys.msg_controllen > INT_MAX)
|
goto out_freeiov;
|
goto out_freeiov;
|
ctl_len = msg_sys.msg_controllen;
|
ctl_len = msg_sys.msg_controllen;
|
if (ctl_len)
|
if (ctl_len)
|
{
|
{
|
if (ctl_len > sizeof(ctl))
|
if (ctl_len > sizeof(ctl))
|
{
|
{
|
ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL);
|
ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL);
|
if (ctl_buf == NULL)
|
if (ctl_buf == NULL)
|
goto out_freeiov;
|
goto out_freeiov;
|
}
|
}
|
err = -EFAULT;
|
err = -EFAULT;
|
if (copy_from_user(ctl_buf, msg_sys.msg_control, ctl_len))
|
if (copy_from_user(ctl_buf, msg_sys.msg_control, ctl_len))
|
goto out_freectl;
|
goto out_freectl;
|
msg_sys.msg_control = ctl_buf;
|
msg_sys.msg_control = ctl_buf;
|
}
|
}
|
msg_sys.msg_flags = flags;
|
msg_sys.msg_flags = flags;
|
|
|
if (sock->file->f_flags & O_NONBLOCK)
|
if (sock->file->f_flags & O_NONBLOCK)
|
msg_sys.msg_flags |= MSG_DONTWAIT;
|
msg_sys.msg_flags |= MSG_DONTWAIT;
|
err = sock_sendmsg(sock, &msg_sys, total_len);
|
err = sock_sendmsg(sock, &msg_sys, total_len);
|
|
|
out_freectl:
|
out_freectl:
|
if (ctl_buf != ctl)
|
if (ctl_buf != ctl)
|
sock_kfree_s(sock->sk, ctl_buf, ctl_len);
|
sock_kfree_s(sock->sk, ctl_buf, ctl_len);
|
out_freeiov:
|
out_freeiov:
|
if (iov != iovstack)
|
if (iov != iovstack)
|
sock_kfree_s(sock->sk, iov, iov_size);
|
sock_kfree_s(sock->sk, iov, iov_size);
|
out_put:
|
out_put:
|
sockfd_put(sock);
|
sockfd_put(sock);
|
out:
|
out:
|
return err;
|
return err;
|
}
|
}
|
|
|
/*
|
/*
|
* BSD recvmsg interface
|
* BSD recvmsg interface
|
*/
|
*/
|
|
|
asmlinkage long sys_recvmsg(int fd, struct msghdr *msg, unsigned int flags)
|
asmlinkage long sys_recvmsg(int fd, struct msghdr *msg, unsigned int flags)
|
{
|
{
|
struct socket *sock;
|
struct socket *sock;
|
struct iovec iovstack[UIO_FASTIOV];
|
struct iovec iovstack[UIO_FASTIOV];
|
struct iovec *iov=iovstack;
|
struct iovec *iov=iovstack;
|
struct msghdr msg_sys;
|
struct msghdr msg_sys;
|
unsigned long cmsg_ptr;
|
unsigned long cmsg_ptr;
|
int err, iov_size, total_len, len;
|
int err, iov_size, total_len, len;
|
|
|
/* kernel mode address */
|
/* kernel mode address */
|
char addr[MAX_SOCK_ADDR];
|
char addr[MAX_SOCK_ADDR];
|
|
|
/* user mode address pointers */
|
/* user mode address pointers */
|
struct sockaddr *uaddr;
|
struct sockaddr *uaddr;
|
int *uaddr_len;
|
int *uaddr_len;
|
|
|
err=-EFAULT;
|
err=-EFAULT;
|
if (copy_from_user(&msg_sys,msg,sizeof(struct msghdr)))
|
if (copy_from_user(&msg_sys,msg,sizeof(struct msghdr)))
|
goto out;
|
goto out;
|
|
|
sock = sockfd_lookup(fd, &err);
|
sock = sockfd_lookup(fd, &err);
|
if (!sock)
|
if (!sock)
|
goto out;
|
goto out;
|
|
|
err = -EMSGSIZE;
|
err = -EMSGSIZE;
|
if (msg_sys.msg_iovlen > UIO_MAXIOV)
|
if (msg_sys.msg_iovlen > UIO_MAXIOV)
|
goto out_put;
|
goto out_put;
|
|
|
/* Check whether to allocate the iovec area*/
|
/* Check whether to allocate the iovec area*/
|
err = -ENOMEM;
|
err = -ENOMEM;
|
iov_size = msg_sys.msg_iovlen * sizeof(struct iovec);
|
iov_size = msg_sys.msg_iovlen * sizeof(struct iovec);
|
if (msg_sys.msg_iovlen > UIO_FASTIOV) {
|
if (msg_sys.msg_iovlen > UIO_FASTIOV) {
|
iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL);
|
iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL);
|
if (!iov)
|
if (!iov)
|
goto out_put;
|
goto out_put;
|
}
|
}
|
|
|
/*
|
/*
|
* Save the user-mode address (verify_iovec will change the
|
* Save the user-mode address (verify_iovec will change the
|
* kernel msghdr to use the kernel address space)
|
* kernel msghdr to use the kernel address space)
|
*/
|
*/
|
|
|
uaddr = msg_sys.msg_name;
|
uaddr = msg_sys.msg_name;
|
uaddr_len = &msg->msg_namelen;
|
uaddr_len = &msg->msg_namelen;
|
err = verify_iovec(&msg_sys, iov, addr, VERIFY_WRITE);
|
err = verify_iovec(&msg_sys, iov, addr, VERIFY_WRITE);
|
if (err < 0)
|
if (err < 0)
|
goto out_freeiov;
|
goto out_freeiov;
|
total_len=err;
|
total_len=err;
|
|
|
cmsg_ptr = (unsigned long)msg_sys.msg_control;
|
cmsg_ptr = (unsigned long)msg_sys.msg_control;
|
msg_sys.msg_flags = 0;
|
msg_sys.msg_flags = 0;
|
|
|
if (sock->file->f_flags & O_NONBLOCK)
|
if (sock->file->f_flags & O_NONBLOCK)
|
flags |= MSG_DONTWAIT;
|
flags |= MSG_DONTWAIT;
|
err = sock_recvmsg(sock, &msg_sys, total_len, flags);
|
err = sock_recvmsg(sock, &msg_sys, total_len, flags);
|
if (err < 0)
|
if (err < 0)
|
goto out_freeiov;
|
goto out_freeiov;
|
len = err;
|
len = err;
|
|
|
if (uaddr != NULL) {
|
if (uaddr != NULL) {
|
err = move_addr_to_user(addr, msg_sys.msg_namelen, uaddr, uaddr_len);
|
err = move_addr_to_user(addr, msg_sys.msg_namelen, uaddr, uaddr_len);
|
if (err < 0)
|
if (err < 0)
|
goto out_freeiov;
|
goto out_freeiov;
|
}
|
}
|
err = __put_user(msg_sys.msg_flags, &msg->msg_flags);
|
err = __put_user(msg_sys.msg_flags, &msg->msg_flags);
|
if (err)
|
if (err)
|
goto out_freeiov;
|
goto out_freeiov;
|
err = __put_user((unsigned long)msg_sys.msg_control-cmsg_ptr,
|
err = __put_user((unsigned long)msg_sys.msg_control-cmsg_ptr,
|
&msg->msg_controllen);
|
&msg->msg_controllen);
|
if (err)
|
if (err)
|
goto out_freeiov;
|
goto out_freeiov;
|
err = len;
|
err = len;
|
|
|
out_freeiov:
|
out_freeiov:
|
if (iov != iovstack)
|
if (iov != iovstack)
|
sock_kfree_s(sock->sk, iov, iov_size);
|
sock_kfree_s(sock->sk, iov, iov_size);
|
out_put:
|
out_put:
|
sockfd_put(sock);
|
sockfd_put(sock);
|
out:
|
out:
|
return err;
|
return err;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* Perform a file control on a socket file descriptor.
|
* Perform a file control on a socket file descriptor.
|
*
|
*
|
* Doesn't acquire a fd lock, because no network fcntl
|
* Doesn't acquire a fd lock, because no network fcntl
|
* function sleeps currently.
|
* function sleeps currently.
|
*/
|
*/
|
|
|
int sock_fcntl(struct file *filp, unsigned int cmd, unsigned long arg)
|
int sock_fcntl(struct file *filp, unsigned int cmd, unsigned long arg)
|
{
|
{
|
struct socket *sock;
|
struct socket *sock;
|
|
|
sock = socki_lookup (filp->f_dentry->d_inode);
|
sock = socki_lookup (filp->f_dentry->d_inode);
|
if (sock && sock->ops)
|
if (sock && sock->ops)
|
return sock_no_fcntl(sock, cmd, arg);
|
return sock_no_fcntl(sock, cmd, arg);
|
return(-EINVAL);
|
return(-EINVAL);
|
}
|
}
|
|
|
/* Argument list sizes for sys_socketcall */
|
/* Argument list sizes for sys_socketcall */
|
#define AL(x) ((x) * sizeof(unsigned long))
|
#define AL(x) ((x) * sizeof(unsigned long))
|
static unsigned char nargs[18]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
|
static unsigned char nargs[18]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
|
AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
|
AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
|
AL(6),AL(2),AL(5),AL(5),AL(3),AL(3)};
|
AL(6),AL(2),AL(5),AL(5),AL(3),AL(3)};
|
#undef AL
|
#undef AL
|
|
|
/*
|
/*
|
* System call vectors.
|
* System call vectors.
|
*
|
*
|
* Argument checking cleaned up. Saved 20% in size.
|
* Argument checking cleaned up. Saved 20% in size.
|
* This function doesn't need to set the kernel lock because
|
* This function doesn't need to set the kernel lock because
|
* it is set by the callees.
|
* it is set by the callees.
|
*/
|
*/
|
|
|
asmlinkage long sys_socketcall(int call, unsigned long *args)
|
asmlinkage long sys_socketcall(int call, unsigned long *args)
|
{
|
{
|
unsigned long a[6];
|
unsigned long a[6];
|
unsigned long a0,a1;
|
unsigned long a0,a1;
|
int err;
|
int err;
|
|
|
if(call<1||call>SYS_RECVMSG)
|
if(call<1||call>SYS_RECVMSG)
|
return -EINVAL;
|
return -EINVAL;
|
|
|
/* copy_from_user should be SMP safe. */
|
/* copy_from_user should be SMP safe. */
|
if (copy_from_user(a, args, nargs[call]))
|
if (copy_from_user(a, args, nargs[call]))
|
return -EFAULT;
|
return -EFAULT;
|
|
|
a0=a[0];
|
a0=a[0];
|
a1=a[1];
|
a1=a[1];
|
|
|
switch(call)
|
switch(call)
|
{
|
{
|
case SYS_SOCKET:
|
case SYS_SOCKET:
|
err = sys_socket(a0,a1,a[2]);
|
err = sys_socket(a0,a1,a[2]);
|
break;
|
break;
|
case SYS_BIND:
|
case SYS_BIND:
|
err = sys_bind(a0,(struct sockaddr *)a1, a[2]);
|
err = sys_bind(a0,(struct sockaddr *)a1, a[2]);
|
break;
|
break;
|
case SYS_CONNECT:
|
case SYS_CONNECT:
|
err = sys_connect(a0, (struct sockaddr *)a1, a[2]);
|
err = sys_connect(a0, (struct sockaddr *)a1, a[2]);
|
break;
|
break;
|
case SYS_LISTEN:
|
case SYS_LISTEN:
|
err = sys_listen(a0,a1);
|
err = sys_listen(a0,a1);
|
break;
|
break;
|
case SYS_ACCEPT:
|
case SYS_ACCEPT:
|
err = sys_accept(a0,(struct sockaddr *)a1, (int *)a[2]);
|
err = sys_accept(a0,(struct sockaddr *)a1, (int *)a[2]);
|
break;
|
break;
|
case SYS_GETSOCKNAME:
|
case SYS_GETSOCKNAME:
|
err = sys_getsockname(a0,(struct sockaddr *)a1, (int *)a[2]);
|
err = sys_getsockname(a0,(struct sockaddr *)a1, (int *)a[2]);
|
break;
|
break;
|
case SYS_GETPEERNAME:
|
case SYS_GETPEERNAME:
|
err = sys_getpeername(a0, (struct sockaddr *)a1, (int *)a[2]);
|
err = sys_getpeername(a0, (struct sockaddr *)a1, (int *)a[2]);
|
break;
|
break;
|
case SYS_SOCKETPAIR:
|
case SYS_SOCKETPAIR:
|
err = sys_socketpair(a0,a1, a[2], (int *)a[3]);
|
err = sys_socketpair(a0,a1, a[2], (int *)a[3]);
|
break;
|
break;
|
case SYS_SEND:
|
case SYS_SEND:
|
err = sys_send(a0, (void *)a1, a[2], a[3]);
|
err = sys_send(a0, (void *)a1, a[2], a[3]);
|
break;
|
break;
|
case SYS_SENDTO:
|
case SYS_SENDTO:
|
err = sys_sendto(a0,(void *)a1, a[2], a[3],
|
err = sys_sendto(a0,(void *)a1, a[2], a[3],
|
(struct sockaddr *)a[4], a[5]);
|
(struct sockaddr *)a[4], a[5]);
|
break;
|
break;
|
case SYS_RECV:
|
case SYS_RECV:
|
err = sys_recv(a0, (void *)a1, a[2], a[3]);
|
err = sys_recv(a0, (void *)a1, a[2], a[3]);
|
break;
|
break;
|
case SYS_RECVFROM:
|
case SYS_RECVFROM:
|
err = sys_recvfrom(a0, (void *)a1, a[2], a[3],
|
err = sys_recvfrom(a0, (void *)a1, a[2], a[3],
|
(struct sockaddr *)a[4], (int *)a[5]);
|
(struct sockaddr *)a[4], (int *)a[5]);
|
break;
|
break;
|
case SYS_SHUTDOWN:
|
case SYS_SHUTDOWN:
|
err = sys_shutdown(a0,a1);
|
err = sys_shutdown(a0,a1);
|
break;
|
break;
|
case SYS_SETSOCKOPT:
|
case SYS_SETSOCKOPT:
|
err = sys_setsockopt(a0, a1, a[2], (char *)a[3], a[4]);
|
err = sys_setsockopt(a0, a1, a[2], (char *)a[3], a[4]);
|
break;
|
break;
|
case SYS_GETSOCKOPT:
|
case SYS_GETSOCKOPT:
|
err = sys_getsockopt(a0, a1, a[2], (char *)a[3], (int *)a[4]);
|
err = sys_getsockopt(a0, a1, a[2], (char *)a[3], (int *)a[4]);
|
break;
|
break;
|
case SYS_SENDMSG:
|
case SYS_SENDMSG:
|
err = sys_sendmsg(a0, (struct msghdr *) a1, a[2]);
|
err = sys_sendmsg(a0, (struct msghdr *) a1, a[2]);
|
break;
|
break;
|
case SYS_RECVMSG:
|
case SYS_RECVMSG:
|
err = sys_recvmsg(a0, (struct msghdr *) a1, a[2]);
|
err = sys_recvmsg(a0, (struct msghdr *) a1, a[2]);
|
break;
|
break;
|
default:
|
default:
|
err = -EINVAL;
|
err = -EINVAL;
|
break;
|
break;
|
}
|
}
|
return err;
|
return err;
|
}
|
}
|
|
|
/*
|
/*
|
* This function is called by a protocol handler that wants to
|
* This function is called by a protocol handler that wants to
|
* advertise its address family, and have it linked into the
|
* advertise its address family, and have it linked into the
|
* SOCKET module.
|
* SOCKET module.
|
*/
|
*/
|
|
|
int sock_register(struct net_proto_family *ops)
|
int sock_register(struct net_proto_family *ops)
|
{
|
{
|
int err;
|
int err;
|
|
|
if (ops->family >= NPROTO) {
|
if (ops->family >= NPROTO) {
|
printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, NPROTO);
|
printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, NPROTO);
|
return -ENOBUFS;
|
return -ENOBUFS;
|
}
|
}
|
net_family_write_lock();
|
net_family_write_lock();
|
err = -EEXIST;
|
err = -EEXIST;
|
if (net_families[ops->family] == NULL) {
|
if (net_families[ops->family] == NULL) {
|
net_families[ops->family]=ops;
|
net_families[ops->family]=ops;
|
err = 0;
|
err = 0;
|
}
|
}
|
net_family_write_unlock();
|
net_family_write_unlock();
|
return err;
|
return err;
|
}
|
}
|
|
|
/*
|
/*
|
* This function is called by a protocol handler that wants to
|
* This function is called by a protocol handler that wants to
|
* remove its address family, and have it unlinked from the
|
* remove its address family, and have it unlinked from the
|
* SOCKET module.
|
* SOCKET module.
|
*/
|
*/
|
|
|
int sock_unregister(int family)
|
int sock_unregister(int family)
|
{
|
{
|
if (family < 0 || family >= NPROTO)
|
if (family < 0 || family >= NPROTO)
|
return -1;
|
return -1;
|
|
|
net_family_write_lock();
|
net_family_write_lock();
|
net_families[family]=NULL;
|
net_families[family]=NULL;
|
net_family_write_unlock();
|
net_family_write_unlock();
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
|
extern void sk_init(void);
|
extern void sk_init(void);
|
|
|
#ifdef CONFIG_WAN_ROUTER
|
#ifdef CONFIG_WAN_ROUTER
|
extern void wanrouter_init(void);
|
extern void wanrouter_init(void);
|
#endif
|
#endif
|
|
|
#ifdef CONFIG_BLUEZ
|
#ifdef CONFIG_BLUEZ
|
extern void bluez_init(void);
|
extern void bluez_init(void);
|
#endif
|
#endif
|
|
|
void __init sock_init(void)
|
void __init sock_init(void)
|
{
|
{
|
int i;
|
int i;
|
|
|
printk(KERN_INFO "Linux NET4.0 for Linux 2.4\n");
|
printk(KERN_INFO "Linux NET4.0 for Linux 2.4\n");
|
printk(KERN_INFO "Based upon Swansea University Computer Society NET3.039\n");
|
printk(KERN_INFO "Based upon Swansea University Computer Society NET3.039\n");
|
|
|
/*
|
/*
|
* Initialize all address (protocol) families.
|
* Initialize all address (protocol) families.
|
*/
|
*/
|
|
|
for (i = 0; i < NPROTO; i++)
|
for (i = 0; i < NPROTO; i++)
|
net_families[i] = NULL;
|
net_families[i] = NULL;
|
|
|
/*
|
/*
|
* Initialize sock SLAB cache.
|
* Initialize sock SLAB cache.
|
*/
|
*/
|
|
|
sk_init();
|
sk_init();
|
|
|
#ifdef SLAB_SKB
|
#ifdef SLAB_SKB
|
/*
|
/*
|
* Initialize skbuff SLAB cache
|
* Initialize skbuff SLAB cache
|
*/
|
*/
|
skb_init();
|
skb_init();
|
#endif
|
#endif
|
|
|
/*
|
/*
|
* Wan router layer.
|
* Wan router layer.
|
*/
|
*/
|
|
|
#ifdef CONFIG_WAN_ROUTER
|
#ifdef CONFIG_WAN_ROUTER
|
wanrouter_init();
|
wanrouter_init();
|
#endif
|
#endif
|
|
|
/*
|
/*
|
* Initialize the protocols module.
|
* Initialize the protocols module.
|
*/
|
*/
|
|
|
register_filesystem(&sock_fs_type);
|
register_filesystem(&sock_fs_type);
|
sock_mnt = kern_mount(&sock_fs_type);
|
sock_mnt = kern_mount(&sock_fs_type);
|
/* The real protocol initialization is performed when
|
/* The real protocol initialization is performed when
|
* do_initcalls is run.
|
* do_initcalls is run.
|
*/
|
*/
|
|
|
|
|
/*
|
/*
|
* The netlink device handler may be needed early.
|
* The netlink device handler may be needed early.
|
*/
|
*/
|
|
|
#ifdef CONFIG_NET
|
#ifdef CONFIG_NET
|
rtnetlink_init();
|
rtnetlink_init();
|
#endif
|
#endif
|
#ifdef CONFIG_NETLINK_DEV
|
#ifdef CONFIG_NETLINK_DEV
|
init_netlink();
|
init_netlink();
|
#endif
|
#endif
|
#ifdef CONFIG_NETFILTER
|
#ifdef CONFIG_NETFILTER
|
netfilter_init();
|
netfilter_init();
|
#endif
|
#endif
|
|
|
#ifdef CONFIG_BLUEZ
|
#ifdef CONFIG_BLUEZ
|
bluez_init();
|
bluez_init();
|
#endif
|
#endif
|
}
|
}
|
|
|
int socket_get_info(char *buffer, char **start, off_t offset, int length)
|
int socket_get_info(char *buffer, char **start, off_t offset, int length)
|
{
|
{
|
int len, cpu;
|
int len, cpu;
|
int counter = 0;
|
int counter = 0;
|
|
|
for (cpu=0; cpu<smp_num_cpus; cpu++)
|
for (cpu=0; cpu<smp_num_cpus; cpu++)
|
counter += sockets_in_use[cpu_logical_map(cpu)].counter;
|
counter += sockets_in_use[cpu_logical_map(cpu)].counter;
|
|
|
/* It can be negative, by the way. 8) */
|
/* It can be negative, by the way. 8) */
|
if (counter < 0)
|
if (counter < 0)
|
counter = 0;
|
counter = 0;
|
|
|
len = sprintf(buffer, "sockets: used %d\n", counter);
|
len = sprintf(buffer, "sockets: used %d\n", counter);
|
if (offset >= len)
|
if (offset >= len)
|
{
|
{
|
*start = buffer;
|
*start = buffer;
|
return 0;
|
return 0;
|
}
|
}
|
*start = buffer + offset;
|
*start = buffer + offset;
|
len -= offset;
|
len -= offset;
|
if (len > length)
|
if (len > length)
|
len = length;
|
len = length;
|
if (len < 0)
|
if (len < 0)
|
len = 0;
|
len = 0;
|
return len;
|
return len;
|
}
|
}
|
|
|
