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net/socket.c
79.6 KB
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/* * NET An implementation of the SOCKET network access protocol. * * Version: @(#)socket.c 1.1.93 18/02/95 * * Authors: Orest Zborowski, <obz@Kodak.COM> |
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* Ross Biro |
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> * * Fixes: * Anonymous : NOTSOCK/BADF cleanup. Error fix in * shutdown() * Alan Cox : verify_area() fixes * Alan Cox : Removed DDI * Jonathan Kamens : SOCK_DGRAM reconnect bug * Alan Cox : Moved a load of checks to the very * top level. * Alan Cox : Move address structures to/from user * mode above the protocol layers. * Rob Janssen : Allow 0 length sends. * Alan Cox : Asynchronous I/O support (cribbed from the * tty drivers). * Niibe Yutaka : Asynchronous I/O for writes (4.4BSD style) * Jeff Uphoff : Made max number of sockets command-line * configurable. * Matti Aarnio : Made the number of sockets dynamic, * to be allocated when needed, and mr. * Uphoff's max is used as max to be * allowed to allocate. * Linus : Argh. removed all the socket allocation * altogether: it's in the inode now. * Alan Cox : Made sock_alloc()/sock_release() public * for NetROM and future kernel nfsd type * stuff. * Alan Cox : sendmsg/recvmsg basics. * Tom Dyas : Export net symbols. * Marcin Dalecki : Fixed problems with CONFIG_NET="n". * Alan Cox : Added thread locking to sys_* calls * for sockets. May have errors at the * moment. * Kevin Buhr : Fixed the dumb errors in the above. * Andi Kleen : Some small cleanups, optimizations, * and fixed a copy_from_user() bug. * Tigran Aivazian : sys_send(args) calls sys_sendto(args, NULL, 0) |
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* Tigran Aivazian : Made listen(2) backlog sanity checks |
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* protocol-independent * * * 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. * * * This module is effectively the top level interface to the BSD socket |
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* paradigm. |
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* * Based upon Swansea University Computer Society NET3.039 */ |
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#include <linux/mm.h> |
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#include <linux/socket.h> #include <linux/file.h> #include <linux/net.h> #include <linux/interrupt.h> |
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#include <linux/thread_info.h> |
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#include <linux/rcupdate.h> |
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#include <linux/netdevice.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> |
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#include <linux/mutex.h> |
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#include <linux/if_bridge.h> |
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#include <linux/if_frad.h> #include <linux/if_vlan.h> |
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#include <linux/ptp_classify.h> |
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#include <linux/init.h> #include <linux/poll.h> #include <linux/cache.h> #include <linux/module.h> #include <linux/highmem.h> |
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#include <linux/mount.h> #include <linux/security.h> #include <linux/syscalls.h> #include <linux/compat.h> #include <linux/kmod.h> |
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#include <linux/audit.h> |
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#include <linux/wireless.h> |
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#include <linux/nsproxy.h> |
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#include <linux/magic.h> |
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#include <linux/slab.h> |
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#include <linux/xattr.h> |
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#include <asm/uaccess.h> #include <asm/unistd.h> #include <net/compat.h> |
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#include <net/wext.h> |
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#include <net/cls_cgroup.h> |
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#include <net/sock.h> #include <linux/netfilter.h> |
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#include <linux/if_tun.h> #include <linux/ipv6_route.h> #include <linux/route.h> |
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#include <linux/sockios.h> #include <linux/atalk.h> |
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#include <net/busy_poll.h> |
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#include <linux/errqueue.h> |
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#ifdef CONFIG_NET_RX_BUSY_POLL |
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unsigned int sysctl_net_busy_read __read_mostly; unsigned int sysctl_net_busy_poll __read_mostly; |
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#endif |
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|
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static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to); static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from); |
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static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
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static int sock_close(struct inode *inode, struct file *file); static unsigned int sock_poll(struct file *file, struct poll_table_struct *wait); |
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static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
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#ifdef CONFIG_COMPAT static long compat_sock_ioctl(struct file *file, |
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unsigned int cmd, unsigned long arg); |
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#endif |
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static int sock_fasync(int fd, struct file *filp, int on); |
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static ssize_t sock_sendpage(struct file *file, struct page *page, int offset, size_t size, loff_t *ppos, int more); |
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static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
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struct pipe_inode_info *pipe, size_t len, |
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unsigned int flags); |
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/* * 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. */ |
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static const struct file_operations socket_file_ops = { |
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.owner = THIS_MODULE, .llseek = no_llseek, |
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.read_iter = sock_read_iter, .write_iter = sock_write_iter, |
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.poll = sock_poll, .unlocked_ioctl = sock_ioctl, |
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#ifdef CONFIG_COMPAT .compat_ioctl = compat_sock_ioctl, #endif |
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.mmap = sock_mmap, |
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.release = sock_close, .fasync = sock_fasync, |
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.sendpage = sock_sendpage, .splice_write = generic_splice_sendpage, |
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.splice_read = sock_splice_read, |
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}; /* * The protocol list. Each protocol is registered in here. */ |
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static DEFINE_SPINLOCK(net_family_lock); |
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static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly; |
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|
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/* * Statistics counters of the socket lists */ |
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static DEFINE_PER_CPU(int, sockets_in_use); |
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/* |
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* Support routines. * Move socket addresses back and forth across the kernel/user * divide and look after the messy bits. |
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*/ |
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/** * move_addr_to_kernel - copy a socket address into kernel space * @uaddr: Address in user space * @kaddr: Address in kernel space * @ulen: Length in user space * * 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 * invalid addresses -EFAULT is returned. On a success 0 is returned. */ |
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int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr) |
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{ |
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if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
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return -EINVAL; |
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if (ulen == 0) |
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return 0; |
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if (copy_from_user(kaddr, uaddr, ulen)) |
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return -EFAULT; |
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return audit_sockaddr(ulen, kaddr); |
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} /** * move_addr_to_user - copy an address to user space * @kaddr: kernel space address * @klen: length of address in kernel * @uaddr: user space address * @ulen: pointer to user length field * * The value pointed to by ulen on entry is the buffer length available. * This is overwritten with the buffer space used. -EINVAL is returned * if an overlong buffer is specified or a negative buffer size. -EFAULT * is returned if either the buffer or the length field are not * accessible. * 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 * specified. Zero is returned for a success. */ |
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|
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static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen, |
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void __user *uaddr, int __user *ulen) |
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{ int err; int len; |
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BUG_ON(klen > sizeof(struct sockaddr_storage)); |
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err = get_user(len, ulen); if (err) |
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return err; |
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if (len > klen) len = klen; |
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if (len < 0) |
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return -EINVAL; |
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if (len) { |
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if (audit_sockaddr(klen, kaddr)) return -ENOMEM; |
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if (copy_to_user(uaddr, kaddr, len)) |
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return -EFAULT; } /* |
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* "fromlen shall refer to the value before truncation.." * 1003.1g |
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*/ return __put_user(klen, ulen); } |
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static struct kmem_cache *sock_inode_cachep __read_mostly; |
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static struct inode *sock_alloc_inode(struct super_block *sb) { struct socket_alloc *ei; |
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struct socket_wq *wq; |
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ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
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if (!ei) return NULL; |
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wq = kmalloc(sizeof(*wq), GFP_KERNEL); if (!wq) { |
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kmem_cache_free(sock_inode_cachep, ei); return NULL; } |
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init_waitqueue_head(&wq->wait); wq->fasync_list = NULL; |
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wq->flags = 0; |
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RCU_INIT_POINTER(ei->socket.wq, wq); |
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ei->socket.state = SS_UNCONNECTED; ei->socket.flags = 0; ei->socket.ops = NULL; ei->socket.sk = NULL; ei->socket.file = NULL; |
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return &ei->vfs_inode; } static void sock_destroy_inode(struct inode *inode) { |
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struct socket_alloc *ei; |
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struct socket_wq *wq; |
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ei = container_of(inode, struct socket_alloc, vfs_inode); |
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wq = rcu_dereference_protected(ei->socket.wq, 1); |
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kfree_rcu(wq, rcu); |
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kmem_cache_free(sock_inode_cachep, ei); |
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} |
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static void init_once(void *foo) |
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{ |
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struct socket_alloc *ei = (struct socket_alloc *)foo; |
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inode_init_once(&ei->vfs_inode); |
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} |
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static int init_inodecache(void) { sock_inode_cachep = kmem_cache_create("sock_inode_cache", |
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sizeof(struct socket_alloc), 0, (SLAB_HWCACHE_ALIGN | SLAB_RECLAIM_ACCOUNT | |
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SLAB_MEM_SPREAD | SLAB_ACCOUNT), |
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init_once); |
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if (sock_inode_cachep == NULL) return -ENOMEM; return 0; } |
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static const struct super_operations sockfs_ops = { |
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.alloc_inode = sock_alloc_inode, .destroy_inode = sock_destroy_inode, .statfs = simple_statfs, |
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}; |
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/* * sockfs_dname() is called from d_path(). */ static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) { return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", |
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d_inode(dentry)->i_ino); |
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} |
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static const struct dentry_operations sockfs_dentry_operations = { |
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.d_dname = sockfs_dname, |
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}; |
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static struct dentry *sockfs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { return mount_pseudo(fs_type, "socket:", &sockfs_ops, &sockfs_dentry_operations, SOCKFS_MAGIC); } static struct vfsmount *sock_mnt __read_mostly; static struct file_system_type sock_fs_type = { .name = "sockfs", .mount = sockfs_mount, .kill_sb = kill_anon_super, }; |
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/* * Obtains the first available file descriptor and sets it up for use. * |
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* These functions create file structures and maps them to fd space * of the current process. On success it returns file descriptor |
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* and file struct implicitly stored in sock->file. * Note that another thread may close file descriptor before we return * 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 * function will increment ref. count on file by 1. * * In any case returned fd MAY BE not valid! * This race condition is unavoidable * with shared fd spaces, we cannot solve it inside kernel, * but we take care of internal coherence yet. */ |
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struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname) |
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{ |
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struct qstr name = { .name = "" }; |
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struct path path; |
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struct file *file; |
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if (dname) { name.name = dname; name.len = strlen(name.name); } else if (sock->sk) { name.name = sock->sk->sk_prot_creator->name; name.len = strlen(name.name); } |
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path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name); |
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if (unlikely(!path.dentry)) return ERR_PTR(-ENOMEM); |
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path.mnt = mntget(sock_mnt); |
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d_instantiate(path.dentry, SOCK_INODE(sock)); |
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file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
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&socket_file_ops); |
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if (IS_ERR(file)) { |
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/* drop dentry, keep inode */ |
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ihold(d_inode(path.dentry)); |
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path_put(&path); |
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return file; |
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} sock->file = file; |
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file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
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file->private_data = sock; |
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return file; |
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} |
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EXPORT_SYMBOL(sock_alloc_file); |
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|
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static int sock_map_fd(struct socket *sock, int flags) |
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{ struct file *newfile; |
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int fd = get_unused_fd_flags(flags); if (unlikely(fd < 0)) return fd; |
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|
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newfile = sock_alloc_file(sock, flags, NULL); |
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if (likely(!IS_ERR(newfile))) { |
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fd_install(fd, newfile); |
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return fd; } |
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put_unused_fd(fd); return PTR_ERR(newfile); |
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} |
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struct socket *sock_from_file(struct file *file, int *err) |
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{ |
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if (file->f_op == &socket_file_ops) return file->private_data; /* set in sock_map_fd */ |
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*err = -ENOTSOCK; return NULL; |
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} |
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EXPORT_SYMBOL(sock_from_file); |
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|
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/** |
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* sockfd_lookup - Go from a file number to its socket slot |
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* @fd: file handle * @err: pointer to an error code return * * 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 * 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. * * On a success the socket object pointer is returned. */ struct socket *sockfd_lookup(int fd, int *err) { struct file *file; |
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struct socket *sock; |
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file = fget(fd); if (!file) { |
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*err = -EBADF; return NULL; } |
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sock = sock_from_file(file, err); if (!sock) |
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fput(file); |
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return sock; } |
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EXPORT_SYMBOL(sockfd_lookup); |
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|
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static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) { |
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struct fd f = fdget(fd); |
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struct socket *sock; |
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*err = -EBADF; |
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if (f.file) { sock = sock_from_file(f.file, err); if (likely(sock)) { *fput_needed = f.flags; |
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return sock; |
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} fdput(f); |
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} |
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return NULL; |
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} |
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#define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname" #define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX) #define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1) |
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static ssize_t sockfs_getxattr(struct dentry *dentry, struct inode *inode, |
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const char *name, void *value, size_t size) { const char *proto_name; size_t proto_size; int error; error = -ENODATA; if (!strncmp(name, XATTR_NAME_SOCKPROTONAME, XATTR_NAME_SOCKPROTONAME_LEN)) { proto_name = dentry->d_name.name; proto_size = strlen(proto_name); if (value) { error = -ERANGE; if (proto_size + 1 > size) goto out; strncpy(value, proto_name, proto_size + 1); } error = proto_size + 1; } out: return error; } static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, size_t size) { ssize_t len; ssize_t used = 0; |
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len = security_inode_listsecurity(d_inode(dentry), buffer, size); |
600e17792
|
480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 |
if (len < 0) return len; used += len; if (buffer) { if (size < used) return -ERANGE; buffer += len; } len = (XATTR_NAME_SOCKPROTONAME_LEN + 1); used += len; if (buffer) { if (size < used) return -ERANGE; memcpy(buffer, XATTR_NAME_SOCKPROTONAME, len); buffer += len; } return used; } static const struct inode_operations sockfs_inode_ops = { .getxattr = sockfs_getxattr, .listxattr = sockfs_listxattr, }; |
1da177e4c
|
505 506 |
/** * sock_alloc - allocate a socket |
89bddce58
|
507 |
* |
1da177e4c
|
508 509 510 511 |
* 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 * NULL is returned. */ |
f4a00aacd
|
512 |
struct socket *sock_alloc(void) |
1da177e4c
|
513 |
{ |
89bddce58
|
514 515 |
struct inode *inode; struct socket *sock; |
1da177e4c
|
516 |
|
a209dfc7b
|
517 |
inode = new_inode_pseudo(sock_mnt->mnt_sb); |
1da177e4c
|
518 519 520 521 |
if (!inode) return NULL; sock = SOCKET_I(inode); |
29a020d35
|
522 |
kmemcheck_annotate_bitfield(sock, type); |
85fe4025c
|
523 |
inode->i_ino = get_next_ino(); |
89bddce58
|
524 |
inode->i_mode = S_IFSOCK | S_IRWXUGO; |
8192b0c48
|
525 526 |
inode->i_uid = current_fsuid(); inode->i_gid = current_fsgid(); |
600e17792
|
527 |
inode->i_op = &sockfs_inode_ops; |
1da177e4c
|
528 |
|
19e8d69c5
|
529 |
this_cpu_add(sockets_in_use, 1); |
1da177e4c
|
530 531 |
return sock; } |
f4a00aacd
|
532 |
EXPORT_SYMBOL(sock_alloc); |
1da177e4c
|
533 |
|
1da177e4c
|
534 535 536 537 538 539 |
/** * sock_release - close a socket * @sock: socket to close * * 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 |
89bddce58
|
540 |
* an inode not a file. |
1da177e4c
|
541 |
*/ |
89bddce58
|
542 |
|
1da177e4c
|
543 544 545 546 547 548 549 550 551 |
void sock_release(struct socket *sock) { if (sock->ops) { struct module *owner = sock->ops->owner; sock->ops->release(sock); sock->ops = NULL; module_put(owner); } |
eaefd1105
|
552 |
if (rcu_dereference_protected(sock->wq, 1)->fasync_list) |
3410f22ea
|
553 554 |
pr_err("%s: fasync list not empty! ", __func__); |
1da177e4c
|
555 |
|
19e8d69c5
|
556 |
this_cpu_sub(sockets_in_use, 1); |
1da177e4c
|
557 558 559 560 |
if (!sock->file) { iput(SOCK_INODE(sock)); return; } |
89bddce58
|
561 |
sock->file = NULL; |
1da177e4c
|
562 |
} |
c6d409cfd
|
563 |
EXPORT_SYMBOL(sock_release); |
1da177e4c
|
564 |
|
c14ac9451
|
565 |
void __sock_tx_timestamp(__u16 tsflags, __u8 *tx_flags) |
20d494735
|
566 |
{ |
140c55d4b
|
567 |
u8 flags = *tx_flags; |
c14ac9451
|
568 |
if (tsflags & SOF_TIMESTAMPING_TX_HARDWARE) |
140c55d4b
|
569 |
flags |= SKBTX_HW_TSTAMP; |
c14ac9451
|
570 |
if (tsflags & SOF_TIMESTAMPING_TX_SOFTWARE) |
140c55d4b
|
571 |
flags |= SKBTX_SW_TSTAMP; |
c14ac9451
|
572 |
if (tsflags & SOF_TIMESTAMPING_TX_SCHED) |
140c55d4b
|
573 |
flags |= SKBTX_SCHED_TSTAMP; |
140c55d4b
|
574 |
*tx_flags = flags; |
20d494735
|
575 |
} |
67cc0d407
|
576 |
EXPORT_SYMBOL(__sock_tx_timestamp); |
20d494735
|
577 |
|
d8725c86a
|
578 |
static inline int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg) |
1da177e4c
|
579 |
{ |
01e97e651
|
580 |
int ret = sock->ops->sendmsg(sock, msg, msg_data_left(msg)); |
d8725c86a
|
581 582 |
BUG_ON(ret == -EIOCBQUEUED); return ret; |
1da177e4c
|
583 |
} |
d8725c86a
|
584 |
int sock_sendmsg(struct socket *sock, struct msghdr *msg) |
228e548e6
|
585 |
{ |
d8725c86a
|
586 |
int err = security_socket_sendmsg(sock, msg, |
01e97e651
|
587 |
msg_data_left(msg)); |
228e548e6
|
588 |
|
d8725c86a
|
589 |
return err ?: sock_sendmsg_nosec(sock, msg); |
0cf00c6f3
|
590 |
} |
c6d409cfd
|
591 |
EXPORT_SYMBOL(sock_sendmsg); |
1da177e4c
|
592 593 594 595 |
int kernel_sendmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec, size_t num, size_t size) { |
6aa248145
|
596 |
iov_iter_kvec(&msg->msg_iter, WRITE | ITER_KVEC, vec, num, size); |
d8725c86a
|
597 |
return sock_sendmsg(sock, msg); |
1da177e4c
|
598 |
} |
c6d409cfd
|
599 |
EXPORT_SYMBOL(kernel_sendmsg); |
1da177e4c
|
600 |
|
92f37fd2e
|
601 602 603 604 605 606 |
/* * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) */ void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb) { |
20d494735
|
607 |
int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
f24b9be59
|
608 |
struct scm_timestamping tss; |
20d494735
|
609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 |
int empty = 1; struct skb_shared_hwtstamps *shhwtstamps = skb_hwtstamps(skb); /* Race occurred between timestamp enabling and packet receiving. Fill in the current time for now. */ if (need_software_tstamp && skb->tstamp.tv64 == 0) __net_timestamp(skb); if (need_software_tstamp) { if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { struct timeval tv; skb_get_timestamp(skb, &tv); put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, sizeof(tv), &tv); } else { |
f24b9be59
|
625 626 |
struct timespec ts; skb_get_timestampns(skb, &ts); |
20d494735
|
627 |
put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
f24b9be59
|
628 |
sizeof(ts), &ts); |
20d494735
|
629 630 |
} } |
f24b9be59
|
631 |
memset(&tss, 0, sizeof(tss)); |
c199105d1
|
632 |
if ((sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE) && |
f24b9be59
|
633 |
ktime_to_timespec_cond(skb->tstamp, tss.ts + 0)) |
20d494735
|
634 |
empty = 0; |
4d276eb6a
|
635 |
if (shhwtstamps && |
b9f40e21e
|
636 |
(sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE) && |
f24b9be59
|
637 |
ktime_to_timespec_cond(shhwtstamps->hwtstamp, tss.ts + 2)) |
4d276eb6a
|
638 |
empty = 0; |
20d494735
|
639 640 |
if (!empty) put_cmsg(msg, SOL_SOCKET, |
f24b9be59
|
641 |
SCM_TIMESTAMPING, sizeof(tss), &tss); |
92f37fd2e
|
642 |
} |
7c81fd8bf
|
643 |
EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
6e3e939f3
|
644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 |
void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, struct sk_buff *skb) { int ack; if (!sock_flag(sk, SOCK_WIFI_STATUS)) return; if (!skb->wifi_acked_valid) return; ack = skb->wifi_acked; put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); } EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); |
11165f145
|
659 660 |
static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, struct sk_buff *skb) |
3b885787e
|
661 |
{ |
744d5a3e9
|
662 |
if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && SOCK_SKB_CB(skb)->dropcount) |
3b885787e
|
663 |
put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, |
744d5a3e9
|
664 |
sizeof(__u32), &SOCK_SKB_CB(skb)->dropcount); |
3b885787e
|
665 |
} |
767dd0336
|
666 |
void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
3b885787e
|
667 668 669 670 671 |
struct sk_buff *skb) { sock_recv_timestamp(msg, sk, skb); sock_recv_drops(msg, sk, skb); } |
767dd0336
|
672 |
EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
3b885787e
|
673 |
|
1b7841404
|
674 |
static inline int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
2da62906b
|
675 |
int flags) |
1da177e4c
|
676 |
{ |
2da62906b
|
677 |
return sock->ops->recvmsg(sock, msg, msg_data_left(msg), flags); |
1da177e4c
|
678 |
} |
2da62906b
|
679 |
int sock_recvmsg(struct socket *sock, struct msghdr *msg, int flags) |
a2e272554
|
680 |
{ |
2da62906b
|
681 |
int err = security_socket_recvmsg(sock, msg, msg_data_left(msg), flags); |
a2e272554
|
682 |
|
2da62906b
|
683 |
return err ?: sock_recvmsg_nosec(sock, msg, flags); |
1da177e4c
|
684 |
} |
c6d409cfd
|
685 |
EXPORT_SYMBOL(sock_recvmsg); |
1da177e4c
|
686 |
|
c1249c0aa
|
687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 |
/** * kernel_recvmsg - Receive a message from a socket (kernel space) * @sock: The socket to receive the message from * @msg: Received message * @vec: Input s/g array for message data * @num: Size of input s/g array * @size: Number of bytes to read * @flags: Message flags (MSG_DONTWAIT, etc...) * * On return the msg structure contains the scatter/gather array passed in the * vec argument. The array is modified so that it consists of the unfilled * portion of the original array. * * The returned value is the total number of bytes received, or an error. */ |
89bddce58
|
702 703 |
int kernel_recvmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec, size_t num, size_t size, int flags) |
1da177e4c
|
704 705 706 |
{ mm_segment_t oldfs = get_fs(); int result; |
6aa248145
|
707 |
iov_iter_kvec(&msg->msg_iter, READ | ITER_KVEC, vec, num, size); |
1da177e4c
|
708 |
set_fs(KERNEL_DS); |
2da62906b
|
709 |
result = sock_recvmsg(sock, msg, flags); |
1da177e4c
|
710 711 712 |
set_fs(oldfs); return result; } |
c6d409cfd
|
713 |
EXPORT_SYMBOL(kernel_recvmsg); |
1da177e4c
|
714 |
|
ce1d4d3e8
|
715 716 |
static ssize_t sock_sendpage(struct file *file, struct page *page, int offset, size_t size, loff_t *ppos, int more) |
1da177e4c
|
717 |
{ |
1da177e4c
|
718 719 |
struct socket *sock; int flags; |
ce1d4d3e8
|
720 |
sock = file->private_data; |
35f9c09fe
|
721 722 723 |
flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ flags |= more; |
ce1d4d3e8
|
724 |
|
e69495838
|
725 |
return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e8
|
726 |
} |
1da177e4c
|
727 |
|
9c55e01c0
|
728 |
static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cfd
|
729 |
struct pipe_inode_info *pipe, size_t len, |
9c55e01c0
|
730 731 732 |
unsigned int flags) { struct socket *sock = file->private_data; |
997b37da1
|
733 734 |
if (unlikely(!sock->ops->splice_read)) return -EINVAL; |
9c55e01c0
|
735 736 |
return sock->ops->splice_read(sock, ppos, pipe, len, flags); } |
8ae5e030f
|
737 |
static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to) |
ce1d4d3e8
|
738 |
{ |
6d6523302
|
739 740 |
struct file *file = iocb->ki_filp; struct socket *sock = file->private_data; |
0345f9313
|
741 742 |
struct msghdr msg = {.msg_iter = *to, .msg_iocb = iocb}; |
8ae5e030f
|
743 |
ssize_t res; |
ce1d4d3e8
|
744 |
|
8ae5e030f
|
745 746 747 748 |
if (file->f_flags & O_NONBLOCK) msg.msg_flags = MSG_DONTWAIT; if (iocb->ki_pos != 0) |
1da177e4c
|
749 |
return -ESPIPE; |
027445c37
|
750 |
|
66ee59af6
|
751 |
if (!iov_iter_count(to)) /* Match SYS5 behaviour */ |
1da177e4c
|
752 |
return 0; |
2da62906b
|
753 |
res = sock_recvmsg(sock, &msg, msg.msg_flags); |
8ae5e030f
|
754 755 |
*to = msg.msg_iter; return res; |
1da177e4c
|
756 |
} |
8ae5e030f
|
757 |
static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from) |
ce1d4d3e8
|
758 |
{ |
6d6523302
|
759 760 |
struct file *file = iocb->ki_filp; struct socket *sock = file->private_data; |
0345f9313
|
761 762 |
struct msghdr msg = {.msg_iter = *from, .msg_iocb = iocb}; |
8ae5e030f
|
763 |
ssize_t res; |
1da177e4c
|
764 |
|
8ae5e030f
|
765 |
if (iocb->ki_pos != 0) |
ce1d4d3e8
|
766 |
return -ESPIPE; |
027445c37
|
767 |
|
8ae5e030f
|
768 769 |
if (file->f_flags & O_NONBLOCK) msg.msg_flags = MSG_DONTWAIT; |
6d6523302
|
770 771 |
if (sock->type == SOCK_SEQPACKET) msg.msg_flags |= MSG_EOR; |
d8725c86a
|
772 |
res = sock_sendmsg(sock, &msg); |
8ae5e030f
|
773 774 |
*from = msg.msg_iter; return res; |
1da177e4c
|
775 |
} |
1da177e4c
|
776 777 778 779 |
/* * Atomic setting of ioctl hooks to avoid race * with module unload. */ |
4a3e2f711
|
780 |
static DEFINE_MUTEX(br_ioctl_mutex); |
c6d409cfd
|
781 |
static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); |
1da177e4c
|
782 |
|
881d966b4
|
783 |
void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4c
|
784 |
{ |
4a3e2f711
|
785 |
mutex_lock(&br_ioctl_mutex); |
1da177e4c
|
786 |
br_ioctl_hook = hook; |
4a3e2f711
|
787 |
mutex_unlock(&br_ioctl_mutex); |
1da177e4c
|
788 789 |
} EXPORT_SYMBOL(brioctl_set); |
4a3e2f711
|
790 |
static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b4
|
791 |
static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4c
|
792 |
|
881d966b4
|
793 |
void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4c
|
794 |
{ |
4a3e2f711
|
795 |
mutex_lock(&vlan_ioctl_mutex); |
1da177e4c
|
796 |
vlan_ioctl_hook = hook; |
4a3e2f711
|
797 |
mutex_unlock(&vlan_ioctl_mutex); |
1da177e4c
|
798 799 |
} EXPORT_SYMBOL(vlan_ioctl_set); |
4a3e2f711
|
800 |
static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce58
|
801 |
static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4c
|
802 |
|
89bddce58
|
803 |
void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4c
|
804 |
{ |
4a3e2f711
|
805 |
mutex_lock(&dlci_ioctl_mutex); |
1da177e4c
|
806 |
dlci_ioctl_hook = hook; |
4a3e2f711
|
807 |
mutex_unlock(&dlci_ioctl_mutex); |
1da177e4c
|
808 809 |
} EXPORT_SYMBOL(dlci_ioctl_set); |
6b96018b2
|
810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 |
static long sock_do_ioctl(struct net *net, struct socket *sock, unsigned int cmd, unsigned long arg) { int err; void __user *argp = (void __user *)arg; err = sock->ops->ioctl(sock, cmd, arg); /* * If this ioctl is unknown try to hand it down * to the NIC driver. */ if (err == -ENOIOCTLCMD) err = dev_ioctl(net, cmd, argp); return err; } |
1da177e4c
|
827 828 829 830 831 832 833 834 |
/* * 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. */ static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) { struct socket *sock; |
881d966b4
|
835 |
struct sock *sk; |
1da177e4c
|
836 837 |
void __user *argp = (void __user *)arg; int pid, err; |
881d966b4
|
838 |
struct net *net; |
1da177e4c
|
839 |
|
b69aee04f
|
840 |
sock = file->private_data; |
881d966b4
|
841 |
sk = sock->sk; |
3b1e0a655
|
842 |
net = sock_net(sk); |
1da177e4c
|
843 |
if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
881d966b4
|
844 |
err = dev_ioctl(net, cmd, argp); |
1da177e4c
|
845 |
} else |
3d23e349d
|
846 |
#ifdef CONFIG_WEXT_CORE |
1da177e4c
|
847 |
if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
881d966b4
|
848 |
err = dev_ioctl(net, cmd, argp); |
1da177e4c
|
849 |
} else |
3d23e349d
|
850 |
#endif |
89bddce58
|
851 |
switch (cmd) { |
1da177e4c
|
852 853 854 855 856 |
case FIOSETOWN: case SIOCSPGRP: err = -EFAULT; if (get_user(pid, (int __user *)argp)) break; |
e0b93eddf
|
857 858 |
f_setown(sock->file, pid, 1); err = 0; |
1da177e4c
|
859 860 861 |
break; case FIOGETOWN: case SIOCGPGRP: |
609d7fa95
|
862 |
err = put_user(f_getown(sock->file), |
89bddce58
|
863 |
(int __user *)argp); |
1da177e4c
|
864 865 866 867 868 869 870 871 |
break; case SIOCGIFBR: case SIOCSIFBR: case SIOCBRADDBR: case SIOCBRDELBR: err = -ENOPKG; if (!br_ioctl_hook) request_module("bridge"); |
4a3e2f711
|
872 |
mutex_lock(&br_ioctl_mutex); |
89bddce58
|
873 |
if (br_ioctl_hook) |
881d966b4
|
874 |
err = br_ioctl_hook(net, cmd, argp); |
4a3e2f711
|
875 |
mutex_unlock(&br_ioctl_mutex); |
1da177e4c
|
876 877 878 879 880 881 |
break; case SIOCGIFVLAN: case SIOCSIFVLAN: err = -ENOPKG; if (!vlan_ioctl_hook) request_module("8021q"); |
4a3e2f711
|
882 |
mutex_lock(&vlan_ioctl_mutex); |
1da177e4c
|
883 |
if (vlan_ioctl_hook) |
881d966b4
|
884 |
err = vlan_ioctl_hook(net, argp); |
4a3e2f711
|
885 |
mutex_unlock(&vlan_ioctl_mutex); |
1da177e4c
|
886 |
break; |
1da177e4c
|
887 888 889 890 891 |
case SIOCADDDLCI: case SIOCDELDLCI: err = -ENOPKG; if (!dlci_ioctl_hook) request_module("dlci"); |
7512cbf6e
|
892 893 |
mutex_lock(&dlci_ioctl_mutex); if (dlci_ioctl_hook) |
1da177e4c
|
894 |
err = dlci_ioctl_hook(cmd, argp); |
7512cbf6e
|
895 |
mutex_unlock(&dlci_ioctl_mutex); |
1da177e4c
|
896 897 |
break; default: |
6b96018b2
|
898 |
err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4c
|
899 |
break; |
89bddce58
|
900 |
} |
1da177e4c
|
901 902 903 904 905 906 907 |
return err; } int sock_create_lite(int family, int type, int protocol, struct socket **res) { int err; struct socket *sock = NULL; |
89bddce58
|
908 |
|
1da177e4c
|
909 910 911 912 913 914 915 916 917 |
err = security_socket_create(family, type, protocol, 1); if (err) goto out; sock = sock_alloc(); if (!sock) { err = -ENOMEM; goto out; } |
1da177e4c
|
918 |
sock->type = type; |
7420ed23a
|
919 920 921 |
err = security_socket_post_create(sock, family, type, protocol, 1); if (err) goto out_release; |
1da177e4c
|
922 923 924 |
out: *res = sock; return err; |
7420ed23a
|
925 926 927 928 |
out_release: sock_release(sock); sock = NULL; goto out; |
1da177e4c
|
929 |
} |
c6d409cfd
|
930 |
EXPORT_SYMBOL(sock_create_lite); |
1da177e4c
|
931 932 |
/* No kernel lock held - perfect */ |
89bddce58
|
933 |
static unsigned int sock_poll(struct file *file, poll_table *wait) |
1da177e4c
|
934 |
{ |
cbf55001b
|
935 |
unsigned int busy_flag = 0; |
1da177e4c
|
936 937 938 |
struct socket *sock; /* |
89bddce58
|
939 |
* We can't return errors to poll, so it's either yes or no. |
1da177e4c
|
940 |
*/ |
b69aee04f
|
941 |
sock = file->private_data; |
2d48d67fa
|
942 |
|
cbf55001b
|
943 |
if (sk_can_busy_loop(sock->sk)) { |
2d48d67fa
|
944 |
/* this socket can poll_ll so tell the system call */ |
cbf55001b
|
945 |
busy_flag = POLL_BUSY_LOOP; |
2d48d67fa
|
946 947 |
/* once, only if requested by syscall */ |
cbf55001b
|
948 949 |
if (wait && (wait->_key & POLL_BUSY_LOOP)) sk_busy_loop(sock->sk, 1); |
2d48d67fa
|
950 |
} |
cbf55001b
|
951 |
return busy_flag | sock->ops->poll(file, sock, wait); |
1da177e4c
|
952 |
} |
89bddce58
|
953 |
static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4c
|
954 |
{ |
b69aee04f
|
955 |
struct socket *sock = file->private_data; |
1da177e4c
|
956 957 958 |
return sock->ops->mmap(file, sock, vma); } |
20380731b
|
959 |
static int sock_close(struct inode *inode, struct file *filp) |
1da177e4c
|
960 |
{ |
1da177e4c
|
961 962 963 964 965 966 967 968 969 970 971 972 |
sock_release(SOCKET_I(inode)); return 0; } /* * Update the socket async list * * Fasync_list locking strategy. * * 1. fasync_list is modified only under process context socket lock * i.e. under semaphore. * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) |
989a29792
|
973 |
* or under socket lock |
1da177e4c
|
974 975 976 977 |
*/ static int sock_fasync(int fd, struct file *filp, int on) { |
989a29792
|
978 979 |
struct socket *sock = filp->private_data; struct sock *sk = sock->sk; |
eaefd1105
|
980 |
struct socket_wq *wq; |
1da177e4c
|
981 |
|
989a29792
|
982 |
if (sk == NULL) |
1da177e4c
|
983 |
return -EINVAL; |
1da177e4c
|
984 985 |
lock_sock(sk); |
1e1d04e67
|
986 |
wq = rcu_dereference_protected(sock->wq, lockdep_sock_is_held(sk)); |
eaefd1105
|
987 |
fasync_helper(fd, filp, on, &wq->fasync_list); |
1da177e4c
|
988 |
|
eaefd1105
|
989 |
if (!wq->fasync_list) |
989a29792
|
990 991 |
sock_reset_flag(sk, SOCK_FASYNC); else |
bcdce7195
|
992 |
sock_set_flag(sk, SOCK_FASYNC); |
1da177e4c
|
993 |
|
989a29792
|
994 |
release_sock(sk); |
1da177e4c
|
995 996 |
return 0; } |
ceb5d58b2
|
997 |
/* This function may be called only under rcu_lock */ |
1da177e4c
|
998 |
|
ceb5d58b2
|
999 |
int sock_wake_async(struct socket_wq *wq, int how, int band) |
1da177e4c
|
1000 |
{ |
ceb5d58b2
|
1001 |
if (!wq || !wq->fasync_list) |
1da177e4c
|
1002 |
return -1; |
ceb5d58b2
|
1003 |
|
89bddce58
|
1004 |
switch (how) { |
8d8ad9d7c
|
1005 |
case SOCK_WAKE_WAITD: |
ceb5d58b2
|
1006 |
if (test_bit(SOCKWQ_ASYNC_WAITDATA, &wq->flags)) |
1da177e4c
|
1007 1008 |
break; goto call_kill; |
8d8ad9d7c
|
1009 |
case SOCK_WAKE_SPACE: |
ceb5d58b2
|
1010 |
if (!test_and_clear_bit(SOCKWQ_ASYNC_NOSPACE, &wq->flags)) |
1da177e4c
|
1011 1012 |
break; /* fall through */ |
8d8ad9d7c
|
1013 |
case SOCK_WAKE_IO: |
89bddce58
|
1014 |
call_kill: |
438154823
|
1015 |
kill_fasync(&wq->fasync_list, SIGIO, band); |
1da177e4c
|
1016 |
break; |
8d8ad9d7c
|
1017 |
case SOCK_WAKE_URG: |
438154823
|
1018 |
kill_fasync(&wq->fasync_list, SIGURG, band); |
1da177e4c
|
1019 |
} |
ceb5d58b2
|
1020 |
|
1da177e4c
|
1021 1022 |
return 0; } |
c6d409cfd
|
1023 |
EXPORT_SYMBOL(sock_wake_async); |
1da177e4c
|
1024 |
|
721db93a5
|
1025 |
int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce58
|
1026 |
struct socket **res, int kern) |
1da177e4c
|
1027 1028 1029 |
{ int err; struct socket *sock; |
55737fda0
|
1030 |
const struct net_proto_family *pf; |
1da177e4c
|
1031 1032 |
/* |
89bddce58
|
1033 |
* Check protocol is in range |
1da177e4c
|
1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 |
*/ if (family < 0 || family >= NPROTO) return -EAFNOSUPPORT; if (type < 0 || type >= SOCK_MAX) return -EINVAL; /* Compatibility. This uglymoron is moved from INET layer to here to avoid deadlock in module load. */ if (family == PF_INET && type == SOCK_PACKET) { |
f3c986908
|
1046 1047 1048 |
pr_info_once("%s uses obsolete (PF_INET,SOCK_PACKET) ", current->comm); |
1da177e4c
|
1049 1050 1051 1052 1053 1054 |
family = PF_PACKET; } err = security_socket_create(family, type, protocol, kern); if (err) return err; |
89bddce58
|
1055 |
|
55737fda0
|
1056 1057 1058 1059 1060 1061 1062 |
/* * Allocate the socket and allow the family to set things up. if * the protocol is 0, the family is instructed to select an appropriate * default. */ sock = sock_alloc(); if (!sock) { |
e87cc4728
|
1063 1064 |
net_warn_ratelimited("socket: no more sockets "); |
55737fda0
|
1065 1066 1067 1068 1069 |
return -ENFILE; /* Not exactly a match, but its the closest posix thing */ } sock->type = type; |
95a5afca4
|
1070 |
#ifdef CONFIG_MODULES |
89bddce58
|
1071 1072 1073 |
/* Attempt to load a protocol module if the find failed. * * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user |
1da177e4c
|
1074 1075 1076 |
* requested real, full-featured networking support upon configuration. * Otherwise module support will break! */ |
190683a9d
|
1077 |
if (rcu_access_pointer(net_families[family]) == NULL) |
89bddce58
|
1078 |
request_module("net-pf-%d", family); |
1da177e4c
|
1079 |
#endif |
55737fda0
|
1080 1081 1082 1083 1084 |
rcu_read_lock(); pf = rcu_dereference(net_families[family]); err = -EAFNOSUPPORT; if (!pf) goto out_release; |
1da177e4c
|
1085 1086 1087 1088 1089 |
/* * We will call the ->create function, that possibly is in a loadable * module, so we have to bump that loadable module refcnt first. */ |
55737fda0
|
1090 |
if (!try_module_get(pf->owner)) |
1da177e4c
|
1091 |
goto out_release; |
55737fda0
|
1092 1093 |
/* Now protected by module ref count */ rcu_read_unlock(); |
3f378b684
|
1094 |
err = pf->create(net, sock, protocol, kern); |
55737fda0
|
1095 |
if (err < 0) |
1da177e4c
|
1096 |
goto out_module_put; |
a79af59ef
|
1097 |
|
1da177e4c
|
1098 1099 1100 1101 |
/* * Now to bump the refcnt of the [loadable] module that owns this * socket at sock_release time we decrement its refcnt. */ |
55737fda0
|
1102 1103 |
if (!try_module_get(sock->ops->owner)) goto out_module_busy; |
1da177e4c
|
1104 1105 1106 1107 |
/* * Now that we're done with the ->create function, the [loadable] * module can have its refcnt decremented */ |
55737fda0
|
1108 |
module_put(pf->owner); |
7420ed23a
|
1109 1110 |
err = security_socket_post_create(sock, family, type, protocol, kern); if (err) |
3b1855255
|
1111 |
goto out_sock_release; |
55737fda0
|
1112 |
*res = sock; |
1da177e4c
|
1113 |
|
55737fda0
|
1114 1115 1116 1117 |
return 0; out_module_busy: err = -EAFNOSUPPORT; |
1da177e4c
|
1118 |
out_module_put: |
55737fda0
|
1119 1120 1121 |
sock->ops = NULL; module_put(pf->owner); out_sock_release: |
1da177e4c
|
1122 |
sock_release(sock); |
55737fda0
|
1123 1124 1125 1126 1127 |
return err; out_release: rcu_read_unlock(); goto out_sock_release; |
1da177e4c
|
1128 |
} |
721db93a5
|
1129 |
EXPORT_SYMBOL(__sock_create); |
1da177e4c
|
1130 1131 1132 |
int sock_create(int family, int type, int protocol, struct socket **res) { |
1b8d7ae42
|
1133 |
return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4c
|
1134 |
} |
c6d409cfd
|
1135 |
EXPORT_SYMBOL(sock_create); |
1da177e4c
|
1136 |
|
eeb1bd5c4
|
1137 |
int sock_create_kern(struct net *net, int family, int type, int protocol, struct socket **res) |
1da177e4c
|
1138 |
{ |
eeb1bd5c4
|
1139 |
return __sock_create(net, family, type, protocol, res, 1); |
1da177e4c
|
1140 |
} |
c6d409cfd
|
1141 |
EXPORT_SYMBOL(sock_create_kern); |
1da177e4c
|
1142 |
|
3e0fa65f8
|
1143 |
SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1da177e4c
|
1144 1145 1146 |
{ int retval; struct socket *sock; |
a677a039b
|
1147 |
int flags; |
e38b36f32
|
1148 1149 1150 1151 1152 |
/* Check the SOCK_* constants for consistency. */ BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); |
a677a039b
|
1153 |
flags = type & ~SOCK_TYPE_MASK; |
77d272005
|
1154 |
if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039b
|
1155 1156 |
return -EINVAL; type &= SOCK_TYPE_MASK; |
1da177e4c
|
1157 |
|
aaca0bdca
|
1158 1159 |
if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
1da177e4c
|
1160 1161 1162 |
retval = sock_create(family, type, protocol, &sock); if (retval < 0) goto out; |
77d272005
|
1163 |
retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4c
|
1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 |
if (retval < 0) goto out_release; out: /* It may be already another descriptor 8) Not kernel problem. */ return retval; out_release: sock_release(sock); return retval; } /* * Create a pair of connected sockets. */ |
3e0fa65f8
|
1179 1180 |
SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, int __user *, usockvec) |
1da177e4c
|
1181 1182 1183 |
{ struct socket *sock1, *sock2; int fd1, fd2, err; |
db3495099
|
1184 |
struct file *newfile1, *newfile2; |
a677a039b
|
1185 1186 1187 |
int flags; flags = type & ~SOCK_TYPE_MASK; |
77d272005
|
1188 |
if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039b
|
1189 1190 |
return -EINVAL; type &= SOCK_TYPE_MASK; |
1da177e4c
|
1191 |
|
aaca0bdca
|
1192 1193 |
if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
1da177e4c
|
1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 |
/* * Obtain the first socket and check if the underlying protocol * supports the socketpair call. */ err = sock_create(family, type, protocol, &sock1); if (err < 0) goto out; err = sock_create(family, type, protocol, &sock2); if (err < 0) goto out_release_1; err = sock1->ops->socketpair(sock1, sock2); |
89bddce58
|
1208 |
if (err < 0) |
1da177e4c
|
1209 |
goto out_release_both; |
284076305
|
1210 |
fd1 = get_unused_fd_flags(flags); |
bf3c23d17
|
1211 1212 |
if (unlikely(fd1 < 0)) { err = fd1; |
db3495099
|
1213 |
goto out_release_both; |
bf3c23d17
|
1214 |
} |
d73aa2867
|
1215 |
|
284076305
|
1216 |
fd2 = get_unused_fd_flags(flags); |
198de4d7a
|
1217 1218 |
if (unlikely(fd2 < 0)) { err = fd2; |
d73aa2867
|
1219 |
goto out_put_unused_1; |
284076305
|
1220 |
} |
aab174f0d
|
1221 |
newfile1 = sock_alloc_file(sock1, flags, NULL); |
b5ffe6344
|
1222 |
if (IS_ERR(newfile1)) { |
284076305
|
1223 |
err = PTR_ERR(newfile1); |
d73aa2867
|
1224 |
goto out_put_unused_both; |
284076305
|
1225 |
} |
aab174f0d
|
1226 |
newfile2 = sock_alloc_file(sock2, flags, NULL); |
284076305
|
1227 1228 |
if (IS_ERR(newfile2)) { err = PTR_ERR(newfile2); |
d73aa2867
|
1229 |
goto out_fput_1; |
db3495099
|
1230 |
} |
d73aa2867
|
1231 1232 1233 1234 1235 1236 1237 |
err = put_user(fd1, &usockvec[0]); if (err) goto out_fput_both; err = put_user(fd2, &usockvec[1]); if (err) goto out_fput_both; |
157cf649a
|
1238 |
audit_fd_pair(fd1, fd2); |
d73aa2867
|
1239 |
|
db3495099
|
1240 1241 |
fd_install(fd1, newfile1); fd_install(fd2, newfile2); |
1da177e4c
|
1242 1243 1244 |
/* fd1 and fd2 may be already another descriptors. * Not kernel problem. */ |
d73aa2867
|
1245 |
return 0; |
1da177e4c
|
1246 |
|
d73aa2867
|
1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 |
out_fput_both: fput(newfile2); fput(newfile1); put_unused_fd(fd2); put_unused_fd(fd1); goto out; out_fput_1: fput(newfile1); put_unused_fd(fd2); put_unused_fd(fd1); sock_release(sock2); goto out; |
1da177e4c
|
1260 |
|
d73aa2867
|
1261 1262 1263 1264 |
out_put_unused_both: put_unused_fd(fd2); out_put_unused_1: put_unused_fd(fd1); |
1da177e4c
|
1265 |
out_release_both: |
89bddce58
|
1266 |
sock_release(sock2); |
1da177e4c
|
1267 |
out_release_1: |
89bddce58
|
1268 |
sock_release(sock1); |
1da177e4c
|
1269 1270 1271 |
out: return err; } |
1da177e4c
|
1272 1273 1274 1275 1276 1277 1278 |
/* * Bind a name to a socket. Nothing much to do here since it's * the protocol's responsibility to handle the local address. * * We move the socket address to kernel space before we call * the protocol layer (having also checked the address is ok). */ |
20f37034f
|
1279 |
SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1da177e4c
|
1280 1281 |
{ struct socket *sock; |
230b18392
|
1282 |
struct sockaddr_storage address; |
6cb153cab
|
1283 |
int err, fput_needed; |
1da177e4c
|
1284 |
|
89bddce58
|
1285 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783a
|
1286 |
if (sock) { |
43db362d3
|
1287 |
err = move_addr_to_kernel(umyaddr, addrlen, &address); |
89bddce58
|
1288 1289 |
if (err >= 0) { err = security_socket_bind(sock, |
230b18392
|
1290 |
(struct sockaddr *)&address, |
89bddce58
|
1291 |
addrlen); |
6cb153cab
|
1292 1293 |
if (!err) err = sock->ops->bind(sock, |
89bddce58
|
1294 |
(struct sockaddr *) |
230b18392
|
1295 |
&address, addrlen); |
1da177e4c
|
1296 |
} |
6cb153cab
|
1297 |
fput_light(sock->file, fput_needed); |
89bddce58
|
1298 |
} |
1da177e4c
|
1299 1300 |
return err; } |
1da177e4c
|
1301 1302 1303 1304 1305 |
/* * Perform a listen. Basically, we allow the protocol to do anything * necessary for a listen, and if that works, we mark the socket as * ready for listening. */ |
3e0fa65f8
|
1306 |
SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1da177e4c
|
1307 1308 |
{ struct socket *sock; |
6cb153cab
|
1309 |
int err, fput_needed; |
b8e1f9b5c
|
1310 |
int somaxconn; |
89bddce58
|
1311 1312 1313 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); if (sock) { |
8efa6e93c
|
1314 |
somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
95c961747
|
1315 |
if ((unsigned int)backlog > somaxconn) |
b8e1f9b5c
|
1316 |
backlog = somaxconn; |
1da177e4c
|
1317 1318 |
err = security_socket_listen(sock, backlog); |
6cb153cab
|
1319 1320 |
if (!err) err = sock->ops->listen(sock, backlog); |
1da177e4c
|
1321 |
|
6cb153cab
|
1322 |
fput_light(sock->file, fput_needed); |
1da177e4c
|
1323 1324 1325 |
} return err; } |
1da177e4c
|
1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 |
/* * For accept, we attempt to create a new socket, set up the link * with the client, wake up the client, then return the new * 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 * we open the socket then return an error. * * 1003.1g adds the ability to recvmsg() to query connection pending * status to recvmsg. We need to add that support in a way thats * clean when we restucture accept also. */ |
20f37034f
|
1337 1338 |
SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, int __user *, upeer_addrlen, int, flags) |
1da177e4c
|
1339 1340 |
{ struct socket *sock, *newsock; |
39d8c1b6f
|
1341 |
struct file *newfile; |
6cb153cab
|
1342 |
int err, len, newfd, fput_needed; |
230b18392
|
1343 |
struct sockaddr_storage address; |
1da177e4c
|
1344 |
|
77d272005
|
1345 |
if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdca
|
1346 1347 1348 1349 |
return -EINVAL; if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
6cb153cab
|
1350 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4c
|
1351 1352 1353 1354 |
if (!sock) goto out; err = -ENFILE; |
c6d409cfd
|
1355 1356 |
newsock = sock_alloc(); if (!newsock) |
1da177e4c
|
1357 1358 1359 1360 |
goto out_put; newsock->type = sock->type; newsock->ops = sock->ops; |
1da177e4c
|
1361 1362 1363 1364 1365 |
/* * We don't need try_module_get here, as the listening socket (sock) * has the protocol module (sock->ops->owner) held. */ __module_get(newsock->ops->owner); |
284076305
|
1366 |
newfd = get_unused_fd_flags(flags); |
39d8c1b6f
|
1367 1368 |
if (unlikely(newfd < 0)) { err = newfd; |
9a1875e60
|
1369 1370 |
sock_release(newsock); goto out_put; |
39d8c1b6f
|
1371 |
} |
aab174f0d
|
1372 |
newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); |
b5ffe6344
|
1373 |
if (IS_ERR(newfile)) { |
284076305
|
1374 1375 1376 1377 1378 |
err = PTR_ERR(newfile); put_unused_fd(newfd); sock_release(newsock); goto out_put; } |
39d8c1b6f
|
1379 |
|
a79af59ef
|
1380 1381 |
err = security_socket_accept(sock, newsock); if (err) |
39d8c1b6f
|
1382 |
goto out_fd; |
a79af59ef
|
1383 |
|
1da177e4c
|
1384 1385 |
err = sock->ops->accept(sock, newsock, sock->file->f_flags); if (err < 0) |
39d8c1b6f
|
1386 |
goto out_fd; |
1da177e4c
|
1387 1388 |
if (upeer_sockaddr) { |
230b18392
|
1389 |
if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
89bddce58
|
1390 |
&len, 2) < 0) { |
1da177e4c
|
1391 |
err = -ECONNABORTED; |
39d8c1b6f
|
1392 |
goto out_fd; |
1da177e4c
|
1393 |
} |
43db362d3
|
1394 |
err = move_addr_to_user(&address, |
230b18392
|
1395 |
len, upeer_sockaddr, upeer_addrlen); |
1da177e4c
|
1396 |
if (err < 0) |
39d8c1b6f
|
1397 |
goto out_fd; |
1da177e4c
|
1398 1399 1400 |
} /* File flags are not inherited via accept() unlike another OSes. */ |
39d8c1b6f
|
1401 1402 |
fd_install(newfd, newfile); err = newfd; |
1da177e4c
|
1403 |
|
1da177e4c
|
1404 |
out_put: |
6cb153cab
|
1405 |
fput_light(sock->file, fput_needed); |
1da177e4c
|
1406 1407 |
out: return err; |
39d8c1b6f
|
1408 |
out_fd: |
9606a2163
|
1409 |
fput(newfile); |
39d8c1b6f
|
1410 |
put_unused_fd(newfd); |
1da177e4c
|
1411 1412 |
goto out_put; } |
20f37034f
|
1413 1414 |
SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, int __user *, upeer_addrlen) |
aaca0bdca
|
1415 |
{ |
de11defeb
|
1416 |
return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdca
|
1417 |
} |
1da177e4c
|
1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 |
/* * 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. * * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to * break bindings * * 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 * include the -EINPROGRESS status for such sockets. */ |
20f37034f
|
1429 1430 |
SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, int, addrlen) |
1da177e4c
|
1431 1432 |
{ struct socket *sock; |
230b18392
|
1433 |
struct sockaddr_storage address; |
6cb153cab
|
1434 |
int err, fput_needed; |
1da177e4c
|
1435 |
|
6cb153cab
|
1436 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4c
|
1437 1438 |
if (!sock) goto out; |
43db362d3
|
1439 |
err = move_addr_to_kernel(uservaddr, addrlen, &address); |
1da177e4c
|
1440 1441 |
if (err < 0) goto out_put; |
89bddce58
|
1442 |
err = |
230b18392
|
1443 |
security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4c
|
1444 1445 |
if (err) goto out_put; |
230b18392
|
1446 |
err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4c
|
1447 1448 |
sock->file->f_flags); out_put: |
6cb153cab
|
1449 |
fput_light(sock->file, fput_needed); |
1da177e4c
|
1450 1451 1452 1453 1454 1455 1456 1457 |
out: return err; } /* * Get the local address ('name') of a socket object. Move the obtained * name to user space. */ |
20f37034f
|
1458 1459 |
SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, int __user *, usockaddr_len) |
1da177e4c
|
1460 1461 |
{ struct socket *sock; |
230b18392
|
1462 |
struct sockaddr_storage address; |
6cb153cab
|
1463 |
int len, err, fput_needed; |
89bddce58
|
1464 |
|
6cb153cab
|
1465 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4c
|
1466 1467 1468 1469 1470 1471 |
if (!sock) goto out; err = security_socket_getsockname(sock); if (err) goto out_put; |
230b18392
|
1472 |
err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1da177e4c
|
1473 1474 |
if (err) goto out_put; |
43db362d3
|
1475 |
err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); |
1da177e4c
|
1476 1477 |
out_put: |
6cb153cab
|
1478 |
fput_light(sock->file, fput_needed); |
1da177e4c
|
1479 1480 1481 1482 1483 1484 1485 1486 |
out: return err; } /* * Get the remote address ('name') of a socket object. Move the obtained * name to user space. */ |
20f37034f
|
1487 1488 |
SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, int __user *, usockaddr_len) |
1da177e4c
|
1489 1490 |
{ struct socket *sock; |
230b18392
|
1491 |
struct sockaddr_storage address; |
6cb153cab
|
1492 |
int len, err, fput_needed; |
1da177e4c
|
1493 |
|
89bddce58
|
1494 1495 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); if (sock != NULL) { |
1da177e4c
|
1496 1497 |
err = security_socket_getpeername(sock); if (err) { |
6cb153cab
|
1498 |
fput_light(sock->file, fput_needed); |
1da177e4c
|
1499 1500 |
return err; } |
89bddce58
|
1501 |
err = |
230b18392
|
1502 |
sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
89bddce58
|
1503 |
1); |
1da177e4c
|
1504 |
if (!err) |
43db362d3
|
1505 |
err = move_addr_to_user(&address, len, usockaddr, |
89bddce58
|
1506 |
usockaddr_len); |
6cb153cab
|
1507 |
fput_light(sock->file, fput_needed); |
1da177e4c
|
1508 1509 1510 1511 1512 1513 1514 1515 1516 |
} return err; } /* * 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 * the protocol. */ |
3e0fa65f8
|
1517 |
SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
95c961747
|
1518 |
unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f8
|
1519 |
int, addr_len) |
1da177e4c
|
1520 1521 |
{ struct socket *sock; |
230b18392
|
1522 |
struct sockaddr_storage address; |
1da177e4c
|
1523 1524 1525 |
int err; struct msghdr msg; struct iovec iov; |
6cb153cab
|
1526 |
int fput_needed; |
6cb153cab
|
1527 |
|
602bd0e90
|
1528 1529 1530 |
err = import_single_range(WRITE, buff, len, &iov, &msg.msg_iter); if (unlikely(err)) return err; |
de0fa95c1
|
1531 1532 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); if (!sock) |
4387ff75f
|
1533 |
goto out; |
6cb153cab
|
1534 |
|
89bddce58
|
1535 |
msg.msg_name = NULL; |
89bddce58
|
1536 1537 1538 |
msg.msg_control = NULL; msg.msg_controllen = 0; msg.msg_namelen = 0; |
6cb153cab
|
1539 |
if (addr) { |
43db362d3
|
1540 |
err = move_addr_to_kernel(addr, addr_len, &address); |
1da177e4c
|
1541 1542 |
if (err < 0) goto out_put; |
230b18392
|
1543 |
msg.msg_name = (struct sockaddr *)&address; |
89bddce58
|
1544 |
msg.msg_namelen = addr_len; |
1da177e4c
|
1545 1546 1547 1548 |
} if (sock->file->f_flags & O_NONBLOCK) flags |= MSG_DONTWAIT; msg.msg_flags = flags; |
d8725c86a
|
1549 |
err = sock_sendmsg(sock, &msg); |
1da177e4c
|
1550 |
|
89bddce58
|
1551 |
out_put: |
de0fa95c1
|
1552 |
fput_light(sock->file, fput_needed); |
4387ff75f
|
1553 |
out: |
1da177e4c
|
1554 1555 1556 1557 |
return err; } /* |
89bddce58
|
1558 |
* Send a datagram down a socket. |
1da177e4c
|
1559 |
*/ |
3e0fa65f8
|
1560 |
SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
95c961747
|
1561 |
unsigned int, flags) |
1da177e4c
|
1562 1563 1564 1565 1566 |
{ return sys_sendto(fd, buff, len, flags, NULL, 0); } /* |
89bddce58
|
1567 |
* Receive a frame from the socket and optionally record the address of the |
1da177e4c
|
1568 1569 1570 |
* sender. We verify the buffers are writable and if needed move the * sender address from kernel to user space. */ |
3e0fa65f8
|
1571 |
SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
95c961747
|
1572 |
unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f8
|
1573 |
int __user *, addr_len) |
1da177e4c
|
1574 1575 1576 1577 |
{ struct socket *sock; struct iovec iov; struct msghdr msg; |
230b18392
|
1578 |
struct sockaddr_storage address; |
89bddce58
|
1579 |
int err, err2; |
6cb153cab
|
1580 |
int fput_needed; |
602bd0e90
|
1581 1582 1583 |
err = import_single_range(READ, ubuf, size, &iov, &msg.msg_iter); if (unlikely(err)) return err; |
de0fa95c1
|
1584 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4c
|
1585 |
if (!sock) |
de0fa95c1
|
1586 |
goto out; |
1da177e4c
|
1587 |
|
89bddce58
|
1588 1589 |
msg.msg_control = NULL; msg.msg_controllen = 0; |
f3d334260
|
1590 1591 1592 1593 |
/* Save some cycles and don't copy the address if not needed */ msg.msg_name = addr ? (struct sockaddr *)&address : NULL; /* We assume all kernel code knows the size of sockaddr_storage */ msg.msg_namelen = 0; |
130ed5d10
|
1594 |
msg.msg_iocb = NULL; |
1da177e4c
|
1595 1596 |
if (sock->file->f_flags & O_NONBLOCK) flags |= MSG_DONTWAIT; |
2da62906b
|
1597 |
err = sock_recvmsg(sock, &msg, flags); |
1da177e4c
|
1598 |
|
89bddce58
|
1599 |
if (err >= 0 && addr != NULL) { |
43db362d3
|
1600 |
err2 = move_addr_to_user(&address, |
230b18392
|
1601 |
msg.msg_namelen, addr, addr_len); |
89bddce58
|
1602 1603 |
if (err2 < 0) err = err2; |
1da177e4c
|
1604 |
} |
de0fa95c1
|
1605 1606 |
fput_light(sock->file, fput_needed); |
4387ff75f
|
1607 |
out: |
1da177e4c
|
1608 1609 1610 1611 |
return err; } /* |
89bddce58
|
1612 |
* Receive a datagram from a socket. |
1da177e4c
|
1613 |
*/ |
b7c0ddf5f
|
1614 1615 |
SYSCALL_DEFINE4(recv, int, fd, void __user *, ubuf, size_t, size, unsigned int, flags) |
1da177e4c
|
1616 1617 1618 1619 1620 1621 1622 1623 |
{ return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); } /* * 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. */ |
20f37034f
|
1624 1625 |
SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, char __user *, optval, int, optlen) |
1da177e4c
|
1626 |
{ |
6cb153cab
|
1627 |
int err, fput_needed; |
1da177e4c
|
1628 1629 1630 1631 |
struct socket *sock; if (optlen < 0) return -EINVAL; |
89bddce58
|
1632 1633 1634 1635 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); if (sock != NULL) { err = security_socket_setsockopt(sock, level, optname); |
6cb153cab
|
1636 1637 |
if (err) goto out_put; |
1da177e4c
|
1638 1639 |
if (level == SOL_SOCKET) |
89bddce58
|
1640 1641 1642 |
err = sock_setsockopt(sock, level, optname, optval, optlen); |
1da177e4c
|
1643 |
else |
89bddce58
|
1644 1645 1646 |
err = sock->ops->setsockopt(sock, level, optname, optval, optlen); |
6cb153cab
|
1647 1648 |
out_put: fput_light(sock->file, fput_needed); |
1da177e4c
|
1649 1650 1651 1652 1653 1654 1655 1656 |
} return err; } /* * 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. */ |
20f37034f
|
1657 1658 |
SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, char __user *, optval, int __user *, optlen) |
1da177e4c
|
1659 |
{ |
6cb153cab
|
1660 |
int err, fput_needed; |
1da177e4c
|
1661 |
struct socket *sock; |
89bddce58
|
1662 1663 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); if (sock != NULL) { |
6cb153cab
|
1664 1665 1666 |
err = security_socket_getsockopt(sock, level, optname); if (err) goto out_put; |
1da177e4c
|
1667 1668 |
if (level == SOL_SOCKET) |
89bddce58
|
1669 1670 1671 |
err = sock_getsockopt(sock, level, optname, optval, optlen); |
1da177e4c
|
1672 |
else |
89bddce58
|
1673 1674 1675 |
err = sock->ops->getsockopt(sock, level, optname, optval, optlen); |
6cb153cab
|
1676 1677 |
out_put: fput_light(sock->file, fput_needed); |
1da177e4c
|
1678 1679 1680 |
} return err; } |
1da177e4c
|
1681 1682 1683 |
/* * Shutdown a socket. */ |
754fe8d29
|
1684 |
SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1da177e4c
|
1685 |
{ |
6cb153cab
|
1686 |
int err, fput_needed; |
1da177e4c
|
1687 |
struct socket *sock; |
89bddce58
|
1688 1689 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); if (sock != NULL) { |
1da177e4c
|
1690 |
err = security_socket_shutdown(sock, how); |
6cb153cab
|
1691 1692 1693 |
if (!err) err = sock->ops->shutdown(sock, how); fput_light(sock->file, fput_needed); |
1da177e4c
|
1694 1695 1696 |
} return err; } |
89bddce58
|
1697 |
/* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4c
|
1698 1699 1700 1701 1702 |
* fields which are the same type (int / unsigned) on our platforms. */ #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) |
c71d8ebe7
|
1703 1704 1705 1706 |
struct used_address { struct sockaddr_storage name; unsigned int name_len; }; |
da1842849
|
1707 1708 1709 1710 |
static int copy_msghdr_from_user(struct msghdr *kmsg, struct user_msghdr __user *umsg, struct sockaddr __user **save_addr, struct iovec **iov) |
1661bf364
|
1711 |
{ |
08adb7dab
|
1712 1713 |
struct sockaddr __user *uaddr; struct iovec __user *uiov; |
c0371da60
|
1714 |
size_t nr_segs; |
08adb7dab
|
1715 1716 1717 1718 1719 1720 |
ssize_t err; if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || __get_user(uaddr, &umsg->msg_name) || __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || __get_user(uiov, &umsg->msg_iov) || |
c0371da60
|
1721 |
__get_user(nr_segs, &umsg->msg_iovlen) || |
08adb7dab
|
1722 1723 1724 |
__get_user(kmsg->msg_control, &umsg->msg_control) || __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || __get_user(kmsg->msg_flags, &umsg->msg_flags)) |
1661bf364
|
1725 |
return -EFAULT; |
dbb490b96
|
1726 |
|
08adb7dab
|
1727 |
if (!uaddr) |
6a2a2b3ae
|
1728 |
kmsg->msg_namelen = 0; |
dbb490b96
|
1729 1730 |
if (kmsg->msg_namelen < 0) return -EINVAL; |
1661bf364
|
1731 |
if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
db31c55a6
|
1732 |
kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
08adb7dab
|
1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 |
if (save_addr) *save_addr = uaddr; if (uaddr && kmsg->msg_namelen) { if (!save_addr) { err = move_addr_to_kernel(uaddr, kmsg->msg_namelen, kmsg->msg_name); if (err < 0) return err; } } else { kmsg->msg_name = NULL; kmsg->msg_namelen = 0; } |
c0371da60
|
1748 |
if (nr_segs > UIO_MAXIOV) |
08adb7dab
|
1749 |
return -EMSGSIZE; |
0345f9313
|
1750 |
kmsg->msg_iocb = NULL; |
da1842849
|
1751 1752 |
return import_iovec(save_addr ? READ : WRITE, uiov, nr_segs, UIO_FASTIOV, iov, &kmsg->msg_iter); |
1661bf364
|
1753 |
} |
666547ff5
|
1754 |
static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg, |
95c961747
|
1755 |
struct msghdr *msg_sys, unsigned int flags, |
28a94d8fb
|
1756 1757 |
struct used_address *used_address, unsigned int allowed_msghdr_flags) |
1da177e4c
|
1758 |
{ |
89bddce58
|
1759 1760 |
struct compat_msghdr __user *msg_compat = (struct compat_msghdr __user *)msg; |
230b18392
|
1761 |
struct sockaddr_storage address; |
1da177e4c
|
1762 |
struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7b
|
1763 |
unsigned char ctl[sizeof(struct cmsghdr) + 20] |
89bddce58
|
1764 1765 |
__attribute__ ((aligned(sizeof(__kernel_size_t)))); /* 20 is size of ipv6_pktinfo */ |
1da177e4c
|
1766 |
unsigned char *ctl_buf = ctl; |
d8725c86a
|
1767 |
int ctl_len; |
08adb7dab
|
1768 |
ssize_t err; |
89bddce58
|
1769 |
|
08adb7dab
|
1770 |
msg_sys->msg_name = &address; |
1da177e4c
|
1771 |
|
084493200
|
1772 |
if (MSG_CMSG_COMPAT & flags) |
08adb7dab
|
1773 |
err = get_compat_msghdr(msg_sys, msg_compat, NULL, &iov); |
084493200
|
1774 |
else |
08adb7dab
|
1775 |
err = copy_msghdr_from_user(msg_sys, msg, NULL, &iov); |
89bddce58
|
1776 |
if (err < 0) |
da1842849
|
1777 |
return err; |
1da177e4c
|
1778 1779 |
err = -ENOBUFS; |
228e548e6
|
1780 |
if (msg_sys->msg_controllen > INT_MAX) |
1da177e4c
|
1781 |
goto out_freeiov; |
28a94d8fb
|
1782 |
flags |= (msg_sys->msg_flags & allowed_msghdr_flags); |
228e548e6
|
1783 |
ctl_len = msg_sys->msg_controllen; |
1da177e4c
|
1784 |
if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce58
|
1785 |
err = |
228e548e6
|
1786 |
cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
89bddce58
|
1787 |
sizeof(ctl)); |
1da177e4c
|
1788 1789 |
if (err) goto out_freeiov; |
228e548e6
|
1790 1791 |
ctl_buf = msg_sys->msg_control; ctl_len = msg_sys->msg_controllen; |
1da177e4c
|
1792 |
} else if (ctl_len) { |
89bddce58
|
1793 |
if (ctl_len > sizeof(ctl)) { |
1da177e4c
|
1794 |
ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce58
|
1795 |
if (ctl_buf == NULL) |
1da177e4c
|
1796 1797 1798 1799 |
goto out_freeiov; } err = -EFAULT; /* |
228e548e6
|
1800 |
* Careful! Before this, msg_sys->msg_control contains a user pointer. |
1da177e4c
|
1801 1802 1803 |
* Afterwards, it will be a kernel pointer. Thus the compiler-assisted * checking falls down on this. */ |
fb8621bb6
|
1804 |
if (copy_from_user(ctl_buf, |
228e548e6
|
1805 |
(void __user __force *)msg_sys->msg_control, |
89bddce58
|
1806 |
ctl_len)) |
1da177e4c
|
1807 |
goto out_freectl; |
228e548e6
|
1808 |
msg_sys->msg_control = ctl_buf; |
1da177e4c
|
1809 |
} |
228e548e6
|
1810 |
msg_sys->msg_flags = flags; |
1da177e4c
|
1811 1812 |
if (sock->file->f_flags & O_NONBLOCK) |
228e548e6
|
1813 |
msg_sys->msg_flags |= MSG_DONTWAIT; |
c71d8ebe7
|
1814 1815 1816 1817 1818 1819 |
/* * If this is sendmmsg() and current destination address is same as * previously succeeded address, omit asking LSM's decision. * used_address->name_len is initialized to UINT_MAX so that the first * destination address never matches. */ |
bc909d9dd
|
1820 1821 1822 |
if (used_address && msg_sys->msg_name && used_address->name_len == msg_sys->msg_namelen && !memcmp(&used_address->name, msg_sys->msg_name, |
c71d8ebe7
|
1823 |
used_address->name_len)) { |
d8725c86a
|
1824 |
err = sock_sendmsg_nosec(sock, msg_sys); |
c71d8ebe7
|
1825 1826 |
goto out_freectl; } |
d8725c86a
|
1827 |
err = sock_sendmsg(sock, msg_sys); |
c71d8ebe7
|
1828 1829 1830 1831 1832 1833 |
/* * If this is sendmmsg() and sending to current destination address was * successful, remember it. */ if (used_address && err >= 0) { used_address->name_len = msg_sys->msg_namelen; |
bc909d9dd
|
1834 1835 1836 |
if (msg_sys->msg_name) memcpy(&used_address->name, msg_sys->msg_name, used_address->name_len); |
c71d8ebe7
|
1837 |
} |
1da177e4c
|
1838 1839 |
out_freectl: |
89bddce58
|
1840 |
if (ctl_buf != ctl) |
1da177e4c
|
1841 1842 |
sock_kfree_s(sock->sk, ctl_buf, ctl_len); out_freeiov: |
da1842849
|
1843 |
kfree(iov); |
228e548e6
|
1844 1845 1846 1847 1848 1849 |
return err; } /* * BSD sendmsg interface */ |
666547ff5
|
1850 |
long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned flags) |
228e548e6
|
1851 1852 1853 |
{ int fput_needed, err; struct msghdr msg_sys; |
1be374a05
|
1854 |
struct socket *sock; |
1be374a05
|
1855 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); |
228e548e6
|
1856 1857 |
if (!sock) goto out; |
28a94d8fb
|
1858 |
err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL, 0); |
228e548e6
|
1859 |
|
6cb153cab
|
1860 |
fput_light(sock->file, fput_needed); |
89bddce58
|
1861 |
out: |
1da177e4c
|
1862 1863 |
return err; } |
666547ff5
|
1864 |
SYSCALL_DEFINE3(sendmsg, int, fd, struct user_msghdr __user *, msg, unsigned int, flags) |
a7526eb5d
|
1865 1866 1867 1868 1869 |
{ if (flags & MSG_CMSG_COMPAT) return -EINVAL; return __sys_sendmsg(fd, msg, flags); } |
228e548e6
|
1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 |
/* * Linux sendmmsg interface */ int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, unsigned int flags) { int fput_needed, err, datagrams; struct socket *sock; struct mmsghdr __user *entry; struct compat_mmsghdr __user *compat_entry; struct msghdr msg_sys; |
c71d8ebe7
|
1882 |
struct used_address used_address; |
f092276d8
|
1883 |
unsigned int oflags = flags; |
228e548e6
|
1884 |
|
98382f419
|
1885 1886 |
if (vlen > UIO_MAXIOV) vlen = UIO_MAXIOV; |
228e548e6
|
1887 1888 1889 1890 1891 1892 |
datagrams = 0; sock = sockfd_lookup_light(fd, &err, &fput_needed); if (!sock) return err; |
c71d8ebe7
|
1893 |
used_address.name_len = UINT_MAX; |
228e548e6
|
1894 1895 |
entry = mmsg; compat_entry = (struct compat_mmsghdr __user *)mmsg; |
728ffb86f
|
1896 |
err = 0; |
f092276d8
|
1897 |
flags |= MSG_BATCH; |
228e548e6
|
1898 1899 |
while (datagrams < vlen) { |
f092276d8
|
1900 1901 |
if (datagrams == vlen - 1) flags = oflags; |
228e548e6
|
1902 |
if (MSG_CMSG_COMPAT & flags) { |
666547ff5
|
1903 |
err = ___sys_sendmsg(sock, (struct user_msghdr __user *)compat_entry, |
28a94d8fb
|
1904 |
&msg_sys, flags, &used_address, MSG_EOR); |
228e548e6
|
1905 1906 1907 1908 1909 |
if (err < 0) break; err = __put_user(err, &compat_entry->msg_len); ++compat_entry; } else { |
a7526eb5d
|
1910 |
err = ___sys_sendmsg(sock, |
666547ff5
|
1911 |
(struct user_msghdr __user *)entry, |
28a94d8fb
|
1912 |
&msg_sys, flags, &used_address, MSG_EOR); |
228e548e6
|
1913 1914 1915 1916 1917 1918 1919 1920 1921 |
if (err < 0) break; err = put_user(err, &entry->msg_len); ++entry; } if (err) break; ++datagrams; |
a78cb84c6
|
1922 |
cond_resched(); |
228e548e6
|
1923 |
} |
228e548e6
|
1924 |
fput_light(sock->file, fput_needed); |
728ffb86f
|
1925 1926 |
/* We only return an error if no datagrams were able to be sent */ if (datagrams != 0) |
228e548e6
|
1927 |
return datagrams; |
228e548e6
|
1928 1929 1930 1931 1932 1933 |
return err; } SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, unsigned int, vlen, unsigned int, flags) { |
1be374a05
|
1934 1935 |
if (flags & MSG_CMSG_COMPAT) return -EINVAL; |
228e548e6
|
1936 1937 |
return __sys_sendmmsg(fd, mmsg, vlen, flags); } |
666547ff5
|
1938 |
static int ___sys_recvmsg(struct socket *sock, struct user_msghdr __user *msg, |
95c961747
|
1939 |
struct msghdr *msg_sys, unsigned int flags, int nosec) |
1da177e4c
|
1940 |
{ |
89bddce58
|
1941 1942 |
struct compat_msghdr __user *msg_compat = (struct compat_msghdr __user *)msg; |
1da177e4c
|
1943 |
struct iovec iovstack[UIO_FASTIOV]; |
89bddce58
|
1944 |
struct iovec *iov = iovstack; |
1da177e4c
|
1945 |
unsigned long cmsg_ptr; |
2da62906b
|
1946 |
int len; |
08adb7dab
|
1947 |
ssize_t err; |
1da177e4c
|
1948 1949 |
/* kernel mode address */ |
230b18392
|
1950 |
struct sockaddr_storage addr; |
1da177e4c
|
1951 1952 1953 |
/* user mode address pointers */ struct sockaddr __user *uaddr; |
08adb7dab
|
1954 |
int __user *uaddr_len = COMPAT_NAMELEN(msg); |
89bddce58
|
1955 |
|
08adb7dab
|
1956 |
msg_sys->msg_name = &addr; |
1da177e4c
|
1957 |
|
f3d334260
|
1958 |
if (MSG_CMSG_COMPAT & flags) |
08adb7dab
|
1959 |
err = get_compat_msghdr(msg_sys, msg_compat, &uaddr, &iov); |
f3d334260
|
1960 |
else |
08adb7dab
|
1961 |
err = copy_msghdr_from_user(msg_sys, msg, &uaddr, &iov); |
1da177e4c
|
1962 |
if (err < 0) |
da1842849
|
1963 |
return err; |
1da177e4c
|
1964 |
|
a2e272554
|
1965 1966 |
cmsg_ptr = (unsigned long)msg_sys->msg_control; msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); |
89bddce58
|
1967 |
|
f3d334260
|
1968 1969 |
/* We assume all kernel code knows the size of sockaddr_storage */ msg_sys->msg_namelen = 0; |
1da177e4c
|
1970 1971 |
if (sock->file->f_flags & O_NONBLOCK) flags |= MSG_DONTWAIT; |
2da62906b
|
1972 |
err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, flags); |
1da177e4c
|
1973 1974 1975 1976 1977 |
if (err < 0) goto out_freeiov; len = err; if (uaddr != NULL) { |
43db362d3
|
1978 |
err = move_addr_to_user(&addr, |
a2e272554
|
1979 |
msg_sys->msg_namelen, uaddr, |
89bddce58
|
1980 |
uaddr_len); |
1da177e4c
|
1981 1982 1983 |
if (err < 0) goto out_freeiov; } |
a2e272554
|
1984 |
err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421c
|
1985 |
COMPAT_FLAGS(msg)); |
1da177e4c
|
1986 1987 1988 |
if (err) goto out_freeiov; if (MSG_CMSG_COMPAT & flags) |
a2e272554
|
1989 |
err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4c
|
1990 1991 |
&msg_compat->msg_controllen); else |
a2e272554
|
1992 |
err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4c
|
1993 1994 1995 1996 1997 1998 |
&msg->msg_controllen); if (err) goto out_freeiov; err = len; out_freeiov: |
da1842849
|
1999 |
kfree(iov); |
a2e272554
|
2000 2001 2002 2003 2004 2005 |
return err; } /* * BSD recvmsg interface */ |
666547ff5
|
2006 |
long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned flags) |
a2e272554
|
2007 2008 2009 |
{ int fput_needed, err; struct msghdr msg_sys; |
1be374a05
|
2010 |
struct socket *sock; |
1be374a05
|
2011 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); |
a2e272554
|
2012 2013 |
if (!sock) goto out; |
a7526eb5d
|
2014 |
err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
a2e272554
|
2015 |
|
6cb153cab
|
2016 |
fput_light(sock->file, fput_needed); |
1da177e4c
|
2017 2018 2019 |
out: return err; } |
666547ff5
|
2020 |
SYSCALL_DEFINE3(recvmsg, int, fd, struct user_msghdr __user *, msg, |
a7526eb5d
|
2021 2022 2023 2024 2025 2026 |
unsigned int, flags) { if (flags & MSG_CMSG_COMPAT) return -EINVAL; return __sys_recvmsg(fd, msg, flags); } |
a2e272554
|
2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 |
/* * Linux recvmmsg interface */ int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, unsigned int flags, struct timespec *timeout) { int fput_needed, err, datagrams; struct socket *sock; struct mmsghdr __user *entry; |
d7256d0eb
|
2037 |
struct compat_mmsghdr __user *compat_entry; |
a2e272554
|
2038 |
struct msghdr msg_sys; |
766b9f928
|
2039 2040 |
struct timespec64 end_time; struct timespec64 timeout64; |
a2e272554
|
2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 |
if (timeout && poll_select_set_timeout(&end_time, timeout->tv_sec, timeout->tv_nsec)) return -EINVAL; datagrams = 0; sock = sockfd_lookup_light(fd, &err, &fput_needed); if (!sock) return err; err = sock_error(sock->sk); if (err) goto out_put; entry = mmsg; |
d7256d0eb
|
2058 |
compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e272554
|
2059 2060 2061 2062 2063 |
while (datagrams < vlen) { /* * No need to ask LSM for more than the first datagram. */ |
d7256d0eb
|
2064 |
if (MSG_CMSG_COMPAT & flags) { |
666547ff5
|
2065 |
err = ___sys_recvmsg(sock, (struct user_msghdr __user *)compat_entry, |
a7526eb5d
|
2066 2067 |
&msg_sys, flags & ~MSG_WAITFORONE, datagrams); |
d7256d0eb
|
2068 2069 2070 2071 2072 |
if (err < 0) break; err = __put_user(err, &compat_entry->msg_len); ++compat_entry; } else { |
a7526eb5d
|
2073 |
err = ___sys_recvmsg(sock, |
666547ff5
|
2074 |
(struct user_msghdr __user *)entry, |
a7526eb5d
|
2075 2076 |
&msg_sys, flags & ~MSG_WAITFORONE, datagrams); |
d7256d0eb
|
2077 2078 2079 2080 2081 |
if (err < 0) break; err = put_user(err, &entry->msg_len); ++entry; } |
a2e272554
|
2082 2083 |
if (err) break; |
a2e272554
|
2084 |
++datagrams; |
71c5c1595
|
2085 2086 2087 |
/* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ if (flags & MSG_WAITFORONE) flags |= MSG_DONTWAIT; |
a2e272554
|
2088 |
if (timeout) { |
766b9f928
|
2089 2090 2091 |
ktime_get_ts64(&timeout64); *timeout = timespec64_to_timespec( timespec64_sub(end_time, timeout64)); |
a2e272554
|
2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 |
if (timeout->tv_sec < 0) { timeout->tv_sec = timeout->tv_nsec = 0; break; } /* Timeout, return less than vlen datagrams */ if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) break; } /* Out of band data, return right away */ if (msg_sys.msg_flags & MSG_OOB) break; |
a78cb84c6
|
2105 |
cond_resched(); |
a2e272554
|
2106 |
} |
a2e272554
|
2107 |
if (err == 0) |
34b88a68f
|
2108 2109 2110 2111 2112 2113 |
goto out_put; if (datagrams == 0) { datagrams = err; goto out_put; } |
a2e272554
|
2114 |
|
34b88a68f
|
2115 2116 2117 2118 2119 |
/* * We may return less entries than requested (vlen) if the * sock is non block and there aren't enough datagrams... */ if (err != -EAGAIN) { |
a2e272554
|
2120 |
/* |
34b88a68f
|
2121 2122 2123 2124 |
* ... or if recvmsg returns an error after we * received some datagrams, where we record the * error to return on the next call or if the * app asks about it using getsockopt(SO_ERROR). |
a2e272554
|
2125 |
*/ |
34b88a68f
|
2126 |
sock->sk->sk_err = -err; |
a2e272554
|
2127 |
} |
34b88a68f
|
2128 2129 |
out_put: fput_light(sock->file, fput_needed); |
a2e272554
|
2130 |
|
34b88a68f
|
2131 |
return datagrams; |
a2e272554
|
2132 2133 2134 2135 2136 2137 2138 2139 |
} SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, unsigned int, vlen, unsigned int, flags, struct timespec __user *, timeout) { int datagrams; struct timespec timeout_sys; |
1be374a05
|
2140 2141 |
if (flags & MSG_CMSG_COMPAT) return -EINVAL; |
a2e272554
|
2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 |
if (!timeout) return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) return -EFAULT; datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); if (datagrams > 0 && copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) datagrams = -EFAULT; return datagrams; } #ifdef __ARCH_WANT_SYS_SOCKETCALL |
1da177e4c
|
2158 2159 |
/* Argument list sizes for sys_socketcall */ #define AL(x) ((x) * sizeof(unsigned long)) |
228e548e6
|
2160 |
static const unsigned char nargs[21] = { |
c6d409cfd
|
2161 2162 2163 |
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(6), AL(2), AL(5), AL(5), AL(3), AL(3), |
228e548e6
|
2164 |
AL(4), AL(5), AL(4) |
89bddce58
|
2165 |
}; |
1da177e4c
|
2166 2167 2168 |
#undef AL /* |
89bddce58
|
2169 |
* System call vectors. |
1da177e4c
|
2170 2171 2172 |
* * Argument checking cleaned up. Saved 20% in size. * This function doesn't need to set the kernel lock because |
89bddce58
|
2173 |
* it is set by the callees. |
1da177e4c
|
2174 |
*/ |
3e0fa65f8
|
2175 |
SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4c
|
2176 |
{ |
2950fa9d3
|
2177 |
unsigned long a[AUDITSC_ARGS]; |
89bddce58
|
2178 |
unsigned long a0, a1; |
1da177e4c
|
2179 |
int err; |
47379052b
|
2180 |
unsigned int len; |
1da177e4c
|
2181 |
|
228e548e6
|
2182 |
if (call < 1 || call > SYS_SENDMMSG) |
1da177e4c
|
2183 |
return -EINVAL; |
47379052b
|
2184 2185 2186 |
len = nargs[call]; if (len > sizeof(a)) return -EINVAL; |
1da177e4c
|
2187 |
/* copy_from_user should be SMP safe. */ |
47379052b
|
2188 |
if (copy_from_user(a, args, len)) |
1da177e4c
|
2189 |
return -EFAULT; |
3ec3b2fba
|
2190 |
|
2950fa9d3
|
2191 2192 2193 |
err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); if (err) return err; |
3ec3b2fba
|
2194 |
|
89bddce58
|
2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 |
a0 = a[0]; a1 = a[1]; switch (call) { case SYS_SOCKET: err = sys_socket(a0, a1, a[2]); break; case SYS_BIND: err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); break; case SYS_CONNECT: err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); break; case SYS_LISTEN: err = sys_listen(a0, a1); break; case SYS_ACCEPT: |
de11defeb
|
2212 2213 |
err = sys_accept4(a0, (struct sockaddr __user *)a1, (int __user *)a[2], 0); |
89bddce58
|
2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 |
break; case SYS_GETSOCKNAME: err = sys_getsockname(a0, (struct sockaddr __user *)a1, (int __user *)a[2]); break; case SYS_GETPEERNAME: err = sys_getpeername(a0, (struct sockaddr __user *)a1, (int __user *)a[2]); break; case SYS_SOCKETPAIR: err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); break; case SYS_SEND: err = sys_send(a0, (void __user *)a1, a[2], a[3]); break; case SYS_SENDTO: err = sys_sendto(a0, (void __user *)a1, a[2], a[3], (struct sockaddr __user *)a[4], a[5]); break; case SYS_RECV: err = sys_recv(a0, (void __user *)a1, a[2], a[3]); break; case SYS_RECVFROM: err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], (struct sockaddr __user *)a[4], (int __user *)a[5]); break; case SYS_SHUTDOWN: err = sys_shutdown(a0, a1); break; case SYS_SETSOCKOPT: err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); break; case SYS_GETSOCKOPT: err = sys_getsockopt(a0, a1, a[2], (char __user *)a[3], (int __user *)a[4]); break; case SYS_SENDMSG: |
666547ff5
|
2255 |
err = sys_sendmsg(a0, (struct user_msghdr __user *)a1, a[2]); |
89bddce58
|
2256 |
break; |
228e548e6
|
2257 2258 2259 |
case SYS_SENDMMSG: err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); break; |
89bddce58
|
2260 |
case SYS_RECVMSG: |
666547ff5
|
2261 |
err = sys_recvmsg(a0, (struct user_msghdr __user *)a1, a[2]); |
89bddce58
|
2262 |
break; |
a2e272554
|
2263 2264 2265 2266 |
case SYS_RECVMMSG: err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], (struct timespec __user *)a[4]); break; |
de11defeb
|
2267 2268 2269 |
case SYS_ACCEPT4: err = sys_accept4(a0, (struct sockaddr __user *)a1, (int __user *)a[2], a[3]); |
aaca0bdca
|
2270 |
break; |
89bddce58
|
2271 2272 2273 |
default: err = -EINVAL; break; |
1da177e4c
|
2274 2275 2276 |
} return err; } |
89bddce58
|
2277 |
#endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4c
|
2278 |
|
55737fda0
|
2279 2280 2281 2282 |
/** * sock_register - add a socket protocol handler * @ops: description of protocol * |
1da177e4c
|
2283 2284 |
* This function is called by a protocol handler that wants to * advertise its address family, and have it linked into the |
e793c0f70
|
2285 |
* socket interface. The value ops->family corresponds to the |
55737fda0
|
2286 |
* socket system call protocol family. |
1da177e4c
|
2287 |
*/ |
f0fd27d42
|
2288 |
int sock_register(const struct net_proto_family *ops) |
1da177e4c
|
2289 2290 2291 2292 |
{ int err; if (ops->family >= NPROTO) { |
3410f22ea
|
2293 2294 |
pr_crit("protocol %d >= NPROTO(%d) ", ops->family, NPROTO); |
1da177e4c
|
2295 2296 |
return -ENOBUFS; } |
55737fda0
|
2297 2298 |
spin_lock(&net_family_lock); |
190683a9d
|
2299 2300 |
if (rcu_dereference_protected(net_families[ops->family], lockdep_is_held(&net_family_lock))) |
55737fda0
|
2301 2302 |
err = -EEXIST; else { |
cf778b00e
|
2303 |
rcu_assign_pointer(net_families[ops->family], ops); |
1da177e4c
|
2304 2305 |
err = 0; } |
55737fda0
|
2306 |
spin_unlock(&net_family_lock); |
3410f22ea
|
2307 2308 |
pr_info("NET: Registered protocol family %d ", ops->family); |
1da177e4c
|
2309 2310 |
return err; } |
c6d409cfd
|
2311 |
EXPORT_SYMBOL(sock_register); |
1da177e4c
|
2312 |
|
55737fda0
|
2313 2314 2315 2316 |
/** * sock_unregister - remove a protocol handler * @family: protocol family to remove * |
1da177e4c
|
2317 2318 |
* This function is called by a protocol handler that wants to * remove its address family, and have it unlinked from the |
55737fda0
|
2319 2320 2321 2322 2323 2324 |
* new socket creation. * * If protocol handler is a module, then it can use module reference * counts to protect against new references. If protocol handler is not * a module then it needs to provide its own protection in * the ops->create routine. |
1da177e4c
|
2325 |
*/ |
f0fd27d42
|
2326 |
void sock_unregister(int family) |
1da177e4c
|
2327 |
{ |
f0fd27d42
|
2328 |
BUG_ON(family < 0 || family >= NPROTO); |
1da177e4c
|
2329 |
|
55737fda0
|
2330 |
spin_lock(&net_family_lock); |
a9b3cd7f3
|
2331 |
RCU_INIT_POINTER(net_families[family], NULL); |
55737fda0
|
2332 2333 2334 |
spin_unlock(&net_family_lock); synchronize_rcu(); |
3410f22ea
|
2335 2336 |
pr_info("NET: Unregistered protocol family %d ", family); |
1da177e4c
|
2337 |
} |
c6d409cfd
|
2338 |
EXPORT_SYMBOL(sock_unregister); |
1da177e4c
|
2339 |
|
77d76ea31
|
2340 |
static int __init sock_init(void) |
1da177e4c
|
2341 |
{ |
b3e19d924
|
2342 |
int err; |
2ca794e5e
|
2343 2344 2345 2346 2347 2348 |
/* * Initialize the network sysctl infrastructure. */ err = net_sysctl_init(); if (err) goto out; |
b3e19d924
|
2349 |
|
1da177e4c
|
2350 |
/* |
89bddce58
|
2351 |
* Initialize skbuff SLAB cache |
1da177e4c
|
2352 2353 |
*/ skb_init(); |
1da177e4c
|
2354 2355 |
/* |
89bddce58
|
2356 |
* Initialize the protocols module. |
1da177e4c
|
2357 2358 2359 |
*/ init_inodecache(); |
b3e19d924
|
2360 2361 2362 2363 |
err = register_filesystem(&sock_fs_type); if (err) goto out_fs; |
1da177e4c
|
2364 |
sock_mnt = kern_mount(&sock_fs_type); |
b3e19d924
|
2365 2366 2367 2368 |
if (IS_ERR(sock_mnt)) { err = PTR_ERR(sock_mnt); goto out_mount; } |
77d76ea31
|
2369 2370 |
/* The real protocol initialization is performed in later initcalls. |
1da177e4c
|
2371 2372 2373 |
*/ #ifdef CONFIG_NETFILTER |
6d11cfdba
|
2374 2375 2376 |
err = netfilter_init(); if (err) goto out; |
1da177e4c
|
2377 |
#endif |
cbeb321a6
|
2378 |
|
408eccce3
|
2379 |
ptp_classifier_init(); |
c1f19b51d
|
2380 |
|
b3e19d924
|
2381 2382 2383 2384 2385 2386 2387 |
out: return err; out_mount: unregister_filesystem(&sock_fs_type); out_fs: goto out; |
1da177e4c
|
2388 |
} |
77d76ea31
|
2389 |
core_initcall(sock_init); /* early initcall */ |
1da177e4c
|
2390 2391 2392 2393 2394 |
#ifdef CONFIG_PROC_FS void socket_seq_show(struct seq_file *seq) { int cpu; int counter = 0; |
6f9120422
|
2395 |
for_each_possible_cpu(cpu) |
89bddce58
|
2396 |
counter += per_cpu(sockets_in_use, cpu); |
1da177e4c
|
2397 2398 2399 2400 2401 2402 2403 2404 |
/* It can be negative, by the way. 8) */ if (counter < 0) counter = 0; seq_printf(seq, "sockets: used %d ", counter); } |
89bddce58
|
2405 |
#endif /* CONFIG_PROC_FS */ |
1da177e4c
|
2406 |
|
89bbfc95d
|
2407 |
#ifdef CONFIG_COMPAT |
6b96018b2
|
2408 |
static int do_siocgstamp(struct net *net, struct socket *sock, |
644595f89
|
2409 |
unsigned int cmd, void __user *up) |
7a229387d
|
2410 |
{ |
7a229387d
|
2411 2412 2413 2414 2415 |
mm_segment_t old_fs = get_fs(); struct timeval ktv; int err; set_fs(KERNEL_DS); |
6b96018b2
|
2416 |
err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387d
|
2417 |
set_fs(old_fs); |
644595f89
|
2418 |
if (!err) |
ed6fe9d61
|
2419 |
err = compat_put_timeval(&ktv, up); |
644595f89
|
2420 |
|
7a229387d
|
2421 2422 |
return err; } |
6b96018b2
|
2423 |
static int do_siocgstampns(struct net *net, struct socket *sock, |
644595f89
|
2424 |
unsigned int cmd, void __user *up) |
7a229387d
|
2425 |
{ |
7a229387d
|
2426 2427 2428 2429 2430 |
mm_segment_t old_fs = get_fs(); struct timespec kts; int err; set_fs(KERNEL_DS); |
6b96018b2
|
2431 |
err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387d
|
2432 |
set_fs(old_fs); |
644595f89
|
2433 |
if (!err) |
ed6fe9d61
|
2434 |
err = compat_put_timespec(&kts, up); |
644595f89
|
2435 |
|
7a229387d
|
2436 2437 |
return err; } |
6b96018b2
|
2438 |
static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
7a229387d
|
2439 2440 2441 2442 2443 |
{ struct ifreq __user *uifr; int err; uifr = compat_alloc_user_space(sizeof(struct ifreq)); |
6b96018b2
|
2444 |
if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
7a229387d
|
2445 |
return -EFAULT; |
6b96018b2
|
2446 |
err = dev_ioctl(net, SIOCGIFNAME, uifr); |
7a229387d
|
2447 2448 |
if (err) return err; |
6b96018b2
|
2449 |
if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
7a229387d
|
2450 2451 2452 2453 |
return -EFAULT; return 0; } |
6b96018b2
|
2454 |
static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387d
|
2455 |
{ |
6b96018b2
|
2456 |
struct compat_ifconf ifc32; |
7a229387d
|
2457 2458 |
struct ifconf ifc; struct ifconf __user *uifc; |
6b96018b2
|
2459 |
struct compat_ifreq __user *ifr32; |
7a229387d
|
2460 2461 2462 |
struct ifreq __user *ifr; unsigned int i, j; int err; |
6b96018b2
|
2463 |
if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387d
|
2464 |
return -EFAULT; |
43da5f2e0
|
2465 |
memset(&ifc, 0, sizeof(ifc)); |
7a229387d
|
2466 2467 2468 2469 2470 2471 |
if (ifc32.ifcbuf == 0) { ifc32.ifc_len = 0; ifc.ifc_len = 0; ifc.ifc_req = NULL; uifc = compat_alloc_user_space(sizeof(struct ifconf)); } else { |
c6d409cfd
|
2472 2473 |
size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * sizeof(struct ifreq); |
7a229387d
|
2474 2475 2476 2477 |
uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); ifc.ifc_len = len; ifr = ifc.ifc_req = (void __user *)(uifc + 1); ifr32 = compat_ptr(ifc32.ifcbuf); |
c6d409cfd
|
2478 |
for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
6b96018b2
|
2479 |
if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387d
|
2480 2481 2482 2483 2484 2485 2486 |
return -EFAULT; ifr++; ifr32++; } } if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) return -EFAULT; |
6b96018b2
|
2487 |
err = dev_ioctl(net, SIOCGIFCONF, uifc); |
7a229387d
|
2488 2489 2490 2491 2492 2493 2494 2495 2496 |
if (err) return err; if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) return -EFAULT; ifr = ifc.ifc_req; ifr32 = compat_ptr(ifc32.ifcbuf); for (i = 0, j = 0; |
c6d409cfd
|
2497 2498 2499 |
i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) |
7a229387d
|
2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 |
return -EFAULT; ifr32++; ifr++; } if (ifc32.ifcbuf == 0) { /* Translate from 64-bit structure multiple to * a 32-bit one. */ i = ifc.ifc_len; |
6b96018b2
|
2510 |
i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
7a229387d
|
2511 2512 2513 2514 |
ifc32.ifc_len = i; } else { ifc32.ifc_len = i; } |
6b96018b2
|
2515 |
if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387d
|
2516 2517 2518 2519 |
return -EFAULT; return 0; } |
6b96018b2
|
2520 |
static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387d
|
2521 |
{ |
3a7da39d1
|
2522 2523 2524 2525 |
struct compat_ethtool_rxnfc __user *compat_rxnfc; bool convert_in = false, convert_out = false; size_t buf_size = ALIGN(sizeof(struct ifreq), 8); struct ethtool_rxnfc __user *rxnfc; |
7a229387d
|
2526 |
struct ifreq __user *ifr; |
3a7da39d1
|
2527 2528 |
u32 rule_cnt = 0, actual_rule_cnt; u32 ethcmd; |
7a229387d
|
2529 |
u32 data; |
3a7da39d1
|
2530 |
int ret; |
7a229387d
|
2531 |
|
3a7da39d1
|
2532 2533 |
if (get_user(data, &ifr32->ifr_ifru.ifru_data)) return -EFAULT; |
7a229387d
|
2534 |
|
3a7da39d1
|
2535 2536 2537 |
compat_rxnfc = compat_ptr(data); if (get_user(ethcmd, &compat_rxnfc->cmd)) |
7a229387d
|
2538 |
return -EFAULT; |
3a7da39d1
|
2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 |
/* Most ethtool structures are defined without padding. * Unfortunately struct ethtool_rxnfc is an exception. */ switch (ethcmd) { default: break; case ETHTOOL_GRXCLSRLALL: /* Buffer size is variable */ if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) return -EFAULT; if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) return -ENOMEM; buf_size += rule_cnt * sizeof(u32); /* fall through */ case ETHTOOL_GRXRINGS: case ETHTOOL_GRXCLSRLCNT: case ETHTOOL_GRXCLSRULE: |
55664f324
|
2556 |
case ETHTOOL_SRXCLSRLINS: |
3a7da39d1
|
2557 2558 2559 |
convert_out = true; /* fall through */ case ETHTOOL_SRXCLSRLDEL: |
3a7da39d1
|
2560 2561 2562 2563 2564 2565 |
buf_size += sizeof(struct ethtool_rxnfc); convert_in = true; break; } ifr = compat_alloc_user_space(buf_size); |
954b12445
|
2566 |
rxnfc = (void __user *)ifr + ALIGN(sizeof(struct ifreq), 8); |
3a7da39d1
|
2567 2568 |
if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) |
7a229387d
|
2569 |
return -EFAULT; |
3a7da39d1
|
2570 2571 |
if (put_user(convert_in ? rxnfc : compat_ptr(data), &ifr->ifr_ifru.ifru_data)) |
7a229387d
|
2572 |
return -EFAULT; |
3a7da39d1
|
2573 |
if (convert_in) { |
127fe533a
|
2574 |
/* We expect there to be holes between fs.m_ext and |
3a7da39d1
|
2575 2576 |
* fs.ring_cookie and at the end of fs, but nowhere else. */ |
127fe533a
|
2577 2578 2579 2580 |
BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + sizeof(compat_rxnfc->fs.m_ext) != offsetof(struct ethtool_rxnfc, fs.m_ext) + sizeof(rxnfc->fs.m_ext)); |
3a7da39d1
|
2581 2582 2583 2584 2585 2586 2587 |
BUILD_BUG_ON( offsetof(struct compat_ethtool_rxnfc, fs.location) - offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != offsetof(struct ethtool_rxnfc, fs.location) - offsetof(struct ethtool_rxnfc, fs.ring_cookie)); if (copy_in_user(rxnfc, compat_rxnfc, |
954b12445
|
2588 2589 |
(void __user *)(&rxnfc->fs.m_ext + 1) - (void __user *)rxnfc) || |
3a7da39d1
|
2590 2591 |
copy_in_user(&rxnfc->fs.ring_cookie, &compat_rxnfc->fs.ring_cookie, |
954b12445
|
2592 2593 |
(void __user *)(&rxnfc->fs.location + 1) - (void __user *)&rxnfc->fs.ring_cookie) || |
3a7da39d1
|
2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 |
copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, sizeof(rxnfc->rule_cnt))) return -EFAULT; } ret = dev_ioctl(net, SIOCETHTOOL, ifr); if (ret) return ret; if (convert_out) { if (copy_in_user(compat_rxnfc, rxnfc, |
954b12445
|
2605 2606 |
(const void __user *)(&rxnfc->fs.m_ext + 1) - (const void __user *)rxnfc) || |
3a7da39d1
|
2607 2608 |
copy_in_user(&compat_rxnfc->fs.ring_cookie, &rxnfc->fs.ring_cookie, |
954b12445
|
2609 2610 |
(const void __user *)(&rxnfc->fs.location + 1) - (const void __user *)&rxnfc->fs.ring_cookie) || |
3a7da39d1
|
2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 |
copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, sizeof(rxnfc->rule_cnt))) return -EFAULT; if (ethcmd == ETHTOOL_GRXCLSRLALL) { /* As an optimisation, we only copy the actual * number of rules that the underlying * function returned. Since Mallory might * change the rule count in user memory, we * check that it is less than the rule count * originally given (as the user buffer size), * which has been range-checked. */ if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) return -EFAULT; if (actual_rule_cnt < rule_cnt) rule_cnt = actual_rule_cnt; if (copy_in_user(&compat_rxnfc->rule_locs[0], &rxnfc->rule_locs[0], rule_cnt * sizeof(u32))) return -EFAULT; } } return 0; |
7a229387d
|
2636 |
} |
7a50a240c
|
2637 2638 2639 2640 2641 |
static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) { void __user *uptr; compat_uptr_t uptr32; struct ifreq __user *uifr; |
c6d409cfd
|
2642 |
uifr = compat_alloc_user_space(sizeof(*uifr)); |
7a50a240c
|
2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 |
if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) return -EFAULT; if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) return -EFAULT; uptr = compat_ptr(uptr32); if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) return -EFAULT; return dev_ioctl(net, SIOCWANDEV, uifr); } |
6b96018b2
|
2656 2657 |
static int bond_ioctl(struct net *net, unsigned int cmd, struct compat_ifreq __user *ifr32) |
7a229387d
|
2658 2659 |
{ struct ifreq kifr; |
7a229387d
|
2660 2661 |
mm_segment_t old_fs; int err; |
7a229387d
|
2662 2663 2664 2665 2666 2667 |
switch (cmd) { case SIOCBONDENSLAVE: case SIOCBONDRELEASE: case SIOCBONDSETHWADDR: case SIOCBONDCHANGEACTIVE: |
6b96018b2
|
2668 |
if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387d
|
2669 2670 2671 |
return -EFAULT; old_fs = get_fs(); |
c6d409cfd
|
2672 |
set_fs(KERNEL_DS); |
c3f52ae6a
|
2673 2674 |
err = dev_ioctl(net, cmd, (struct ifreq __user __force *) &kifr); |
c6d409cfd
|
2675 |
set_fs(old_fs); |
7a229387d
|
2676 2677 |
return err; |
7a229387d
|
2678 |
default: |
07d106d0a
|
2679 |
return -ENOIOCTLCMD; |
ccbd6a5a4
|
2680 |
} |
7a229387d
|
2681 |
} |
590d4693f
|
2682 2683 |
/* Handle ioctls that use ifreq::ifr_data and just need struct ifreq converted */ static int compat_ifr_data_ioctl(struct net *net, unsigned int cmd, |
6b96018b2
|
2684 |
struct compat_ifreq __user *u_ifreq32) |
7a229387d
|
2685 2686 |
{ struct ifreq __user *u_ifreq64; |
7a229387d
|
2687 2688 2689 2690 2691 2692 2693 |
char tmp_buf[IFNAMSIZ]; void __user *data64; u32 data32; if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), IFNAMSIZ)) return -EFAULT; |
417c3522b
|
2694 |
if (get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) |
7a229387d
|
2695 2696 2697 2698 |
return -EFAULT; data64 = compat_ptr(data32); u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); |
7a229387d
|
2699 2700 2701 |
if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], IFNAMSIZ)) return -EFAULT; |
417c3522b
|
2702 |
if (put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) |
7a229387d
|
2703 |
return -EFAULT; |
6b96018b2
|
2704 |
return dev_ioctl(net, cmd, u_ifreq64); |
7a229387d
|
2705 |
} |
6b96018b2
|
2706 2707 |
static int dev_ifsioc(struct net *net, struct socket *sock, unsigned int cmd, struct compat_ifreq __user *uifr32) |
7a229387d
|
2708 |
{ |
a2116ed22
|
2709 |
struct ifreq __user *uifr; |
7a229387d
|
2710 |
int err; |
a2116ed22
|
2711 2712 2713 2714 2715 |
uifr = compat_alloc_user_space(sizeof(*uifr)); if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) return -EFAULT; err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); |
7a229387d
|
2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 |
if (!err) { switch (cmd) { case SIOCGIFFLAGS: case SIOCGIFMETRIC: case SIOCGIFMTU: case SIOCGIFMEM: case SIOCGIFHWADDR: case SIOCGIFINDEX: case SIOCGIFADDR: case SIOCGIFBRDADDR: case SIOCGIFDSTADDR: case SIOCGIFNETMASK: |
fab2532ba
|
2728 |
case SIOCGIFPFLAGS: |
7a229387d
|
2729 |
case SIOCGIFTXQLEN: |
fab2532ba
|
2730 2731 |
case SIOCGMIIPHY: case SIOCGMIIREG: |
a2116ed22
|
2732 |
if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
7a229387d
|
2733 2734 2735 2736 2737 2738 |
err = -EFAULT; break; } } return err; } |
a2116ed22
|
2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 |
static int compat_sioc_ifmap(struct net *net, unsigned int cmd, struct compat_ifreq __user *uifr32) { struct ifreq ifr; struct compat_ifmap __user *uifmap32; mm_segment_t old_fs; int err; uifmap32 = &uifr32->ifr_ifru.ifru_map; err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); |
3ddc5b46a
|
2749 2750 2751 2752 2753 2754 |
err |= get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); err |= get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); err |= get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); err |= get_user(ifr.ifr_map.irq, &uifmap32->irq); err |= get_user(ifr.ifr_map.dma, &uifmap32->dma); err |= get_user(ifr.ifr_map.port, &uifmap32->port); |
a2116ed22
|
2755 2756 2757 2758 |
if (err) return -EFAULT; old_fs = get_fs(); |
c6d409cfd
|
2759 |
set_fs(KERNEL_DS); |
c3f52ae6a
|
2760 |
err = dev_ioctl(net, cmd, (void __user __force *)&ifr); |
c6d409cfd
|
2761 |
set_fs(old_fs); |
a2116ed22
|
2762 2763 2764 |
if (cmd == SIOCGIFMAP && !err) { err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); |
3ddc5b46a
|
2765 2766 2767 2768 2769 2770 |
err |= put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); err |= put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); err |= put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); err |= put_user(ifr.ifr_map.irq, &uifmap32->irq); err |= put_user(ifr.ifr_map.dma, &uifmap32->dma); err |= put_user(ifr.ifr_map.port, &uifmap32->port); |
a2116ed22
|
2771 2772 2773 2774 2775 |
if (err) err = -EFAULT; } return err; } |
7a229387d
|
2776 |
struct rtentry32 { |
c6d409cfd
|
2777 |
u32 rt_pad1; |
7a229387d
|
2778 2779 2780 |
struct sockaddr rt_dst; /* target address */ struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ struct sockaddr rt_genmask; /* target network mask (IP) */ |
c6d409cfd
|
2781 2782 2783 2784 2785 2786 2787 |
unsigned short rt_flags; short rt_pad2; u32 rt_pad3; unsigned char rt_tos; unsigned char rt_class; short rt_pad4; short rt_metric; /* +1 for binary compatibility! */ |
7a229387d
|
2788 |
/* char * */ u32 rt_dev; /* forcing the device at add */ |
c6d409cfd
|
2789 2790 |
u32 rt_mtu; /* per route MTU/Window */ u32 rt_window; /* Window clamping */ |
7a229387d
|
2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 |
unsigned short rt_irtt; /* Initial RTT */ }; struct in6_rtmsg32 { struct in6_addr rtmsg_dst; struct in6_addr rtmsg_src; struct in6_addr rtmsg_gateway; u32 rtmsg_type; u16 rtmsg_dst_len; u16 rtmsg_src_len; u32 rtmsg_metric; u32 rtmsg_info; u32 rtmsg_flags; s32 rtmsg_ifindex; }; |
6b96018b2
|
2806 2807 |
static int routing_ioctl(struct net *net, struct socket *sock, unsigned int cmd, void __user *argp) |
7a229387d
|
2808 2809 2810 2811 2812 2813 2814 2815 |
{ int ret; void *r = NULL; struct in6_rtmsg r6; struct rtentry r4; char devname[16]; u32 rtdev; mm_segment_t old_fs = get_fs(); |
6b96018b2
|
2816 2817 |
if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ struct in6_rtmsg32 __user *ur6 = argp; |
c6d409cfd
|
2818 |
ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
7a229387d
|
2819 |
3 * sizeof(struct in6_addr)); |
3ddc5b46a
|
2820 2821 2822 2823 2824 2825 2826 |
ret |= get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); ret |= get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); ret |= get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); ret |= get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); ret |= get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); ret |= get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); ret |= get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); |
7a229387d
|
2827 2828 2829 |
r = (void *) &r6; } else { /* ipv4 */ |
6b96018b2
|
2830 |
struct rtentry32 __user *ur4 = argp; |
c6d409cfd
|
2831 |
ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
7a229387d
|
2832 |
3 * sizeof(struct sockaddr)); |
3ddc5b46a
|
2833 2834 2835 2836 2837 2838 |
ret |= get_user(r4.rt_flags, &(ur4->rt_flags)); ret |= get_user(r4.rt_metric, &(ur4->rt_metric)); ret |= get_user(r4.rt_mtu, &(ur4->rt_mtu)); ret |= get_user(r4.rt_window, &(ur4->rt_window)); ret |= get_user(r4.rt_irtt, &(ur4->rt_irtt)); ret |= get_user(rtdev, &(ur4->rt_dev)); |
7a229387d
|
2839 |
if (rtdev) { |
c6d409cfd
|
2840 |
ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
c3f52ae6a
|
2841 2842 |
r4.rt_dev = (char __user __force *)devname; devname[15] = 0; |
7a229387d
|
2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 |
} else r4.rt_dev = NULL; r = (void *) &r4; } if (ret) { ret = -EFAULT; goto out; } |
c6d409cfd
|
2853 |
set_fs(KERNEL_DS); |
6b96018b2
|
2854 |
ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
c6d409cfd
|
2855 |
set_fs(old_fs); |
7a229387d
|
2856 2857 |
out: |
7a229387d
|
2858 2859 2860 2861 2862 |
return ret; } /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE * for some operations; this forces use of the newer bridge-utils that |
25985edce
|
2863 |
* use compatible ioctls |
7a229387d
|
2864 |
*/ |
6b96018b2
|
2865 |
static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387d
|
2866 |
{ |
6b96018b2
|
2867 |
compat_ulong_t tmp; |
7a229387d
|
2868 |
|
6b96018b2
|
2869 |
if (get_user(tmp, argp)) |
7a229387d
|
2870 2871 2872 2873 2874 |
return -EFAULT; if (tmp == BRCTL_GET_VERSION) return BRCTL_VERSION + 1; return -EINVAL; } |
6b96018b2
|
2875 2876 2877 2878 2879 2880 |
static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, unsigned int cmd, unsigned long arg) { void __user *argp = compat_ptr(arg); struct sock *sk = sock->sk; struct net *net = sock_net(sk); |
7a229387d
|
2881 |
|
6b96018b2
|
2882 |
if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
590d4693f
|
2883 |
return compat_ifr_data_ioctl(net, cmd, argp); |
6b96018b2
|
2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 |
switch (cmd) { case SIOCSIFBR: case SIOCGIFBR: return old_bridge_ioctl(argp); case SIOCGIFNAME: return dev_ifname32(net, argp); case SIOCGIFCONF: return dev_ifconf(net, argp); case SIOCETHTOOL: return ethtool_ioctl(net, argp); |
7a50a240c
|
2895 2896 |
case SIOCWANDEV: return compat_siocwandev(net, argp); |
a2116ed22
|
2897 2898 2899 |
case SIOCGIFMAP: case SIOCSIFMAP: return compat_sioc_ifmap(net, cmd, argp); |
6b96018b2
|
2900 2901 2902 |
case SIOCBONDENSLAVE: case SIOCBONDRELEASE: case SIOCBONDSETHWADDR: |
6b96018b2
|
2903 2904 2905 2906 2907 2908 2909 2910 2911 |
case SIOCBONDCHANGEACTIVE: return bond_ioctl(net, cmd, argp); case SIOCADDRT: case SIOCDELRT: return routing_ioctl(net, sock, cmd, argp); case SIOCGSTAMP: return do_siocgstamp(net, sock, cmd, argp); case SIOCGSTAMPNS: return do_siocgstampns(net, sock, cmd, argp); |
590d4693f
|
2912 2913 |
case SIOCBONDSLAVEINFOQUERY: case SIOCBONDINFOQUERY: |
a2116ed22
|
2914 |
case SIOCSHWTSTAMP: |
fd468c74b
|
2915 |
case SIOCGHWTSTAMP: |
590d4693f
|
2916 |
return compat_ifr_data_ioctl(net, cmd, argp); |
6b96018b2
|
2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 |
case FIOSETOWN: case SIOCSPGRP: case FIOGETOWN: case SIOCGPGRP: case SIOCBRADDBR: case SIOCBRDELBR: case SIOCGIFVLAN: case SIOCSIFVLAN: case SIOCADDDLCI: case SIOCDELDLCI: return sock_ioctl(file, cmd, arg); case SIOCGIFFLAGS: case SIOCSIFFLAGS: case SIOCGIFMETRIC: case SIOCSIFMETRIC: case SIOCGIFMTU: case SIOCSIFMTU: case SIOCGIFMEM: case SIOCSIFMEM: case SIOCGIFHWADDR: case SIOCSIFHWADDR: case SIOCADDMULTI: case SIOCDELMULTI: case SIOCGIFINDEX: |
6b96018b2
|
2943 2944 2945 |
case SIOCGIFADDR: case SIOCSIFADDR: case SIOCSIFHWBROADCAST: |
6b96018b2
|
2946 |
case SIOCDIFADDR: |
6b96018b2
|
2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 |
case SIOCGIFBRDADDR: case SIOCSIFBRDADDR: case SIOCGIFDSTADDR: case SIOCSIFDSTADDR: case SIOCGIFNETMASK: case SIOCSIFNETMASK: case SIOCSIFPFLAGS: case SIOCGIFPFLAGS: case SIOCGIFTXQLEN: case SIOCSIFTXQLEN: case SIOCBRADDIF: case SIOCBRDELIF: |
9177efd39
|
2959 2960 2961 2962 |
case SIOCSIFNAME: case SIOCGMIIPHY: case SIOCGMIIREG: case SIOCSMIIREG: |
6b96018b2
|
2963 |
return dev_ifsioc(net, sock, cmd, argp); |
9177efd39
|
2964 |
|
6b96018b2
|
2965 2966 2967 |
case SIOCSARP: case SIOCGARP: case SIOCDARP: |
6b96018b2
|
2968 |
case SIOCATMARK: |
9177efd39
|
2969 2970 |
return sock_do_ioctl(net, sock, cmd, arg); } |
6b96018b2
|
2971 2972 |
return -ENOIOCTLCMD; } |
7a229387d
|
2973 |
|
95c961747
|
2974 |
static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
89bddce58
|
2975 |
unsigned long arg) |
89bbfc95d
|
2976 2977 2978 |
{ struct socket *sock = file->private_data; int ret = -ENOIOCTLCMD; |
87de87d5e
|
2979 2980 2981 2982 2983 |
struct sock *sk; struct net *net; sk = sock->sk; net = sock_net(sk); |
89bbfc95d
|
2984 2985 2986 |
if (sock->ops->compat_ioctl) ret = sock->ops->compat_ioctl(sock, cmd, arg); |
87de87d5e
|
2987 2988 2989 |
if (ret == -ENOIOCTLCMD && (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) ret = compat_wext_handle_ioctl(net, cmd, arg); |
6b96018b2
|
2990 2991 |
if (ret == -ENOIOCTLCMD) ret = compat_sock_ioctl_trans(file, sock, cmd, arg); |
89bbfc95d
|
2992 2993 2994 |
return ret; } #endif |
ac5a488ef
|
2995 2996 2997 2998 |
int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) { return sock->ops->bind(sock, addr, addrlen); } |
c6d409cfd
|
2999 |
EXPORT_SYMBOL(kernel_bind); |
ac5a488ef
|
3000 3001 3002 3003 3004 |
int kernel_listen(struct socket *sock, int backlog) { return sock->ops->listen(sock, backlog); } |
c6d409cfd
|
3005 |
EXPORT_SYMBOL(kernel_listen); |
ac5a488ef
|
3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 |
int kernel_accept(struct socket *sock, struct socket **newsock, int flags) { struct sock *sk = sock->sk; int err; err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, newsock); if (err < 0) goto done; err = sock->ops->accept(sock, *newsock, flags); if (err < 0) { sock_release(*newsock); |
fa8705b00
|
3020 |
*newsock = NULL; |
ac5a488ef
|
3021 3022 3023 3024 |
goto done; } (*newsock)->ops = sock->ops; |
1b08534e5
|
3025 |
__module_get((*newsock)->ops->owner); |
ac5a488ef
|
3026 3027 3028 3029 |
done: return err; } |
c6d409cfd
|
3030 |
EXPORT_SYMBOL(kernel_accept); |
ac5a488ef
|
3031 3032 |
int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, |
4768fbcbc
|
3033 |
int flags) |
ac5a488ef
|
3034 3035 3036 |
{ return sock->ops->connect(sock, addr, addrlen, flags); } |
c6d409cfd
|
3037 |
EXPORT_SYMBOL(kernel_connect); |
ac5a488ef
|
3038 3039 3040 3041 3042 3043 |
int kernel_getsockname(struct socket *sock, struct sockaddr *addr, int *addrlen) { return sock->ops->getname(sock, addr, addrlen, 0); } |
c6d409cfd
|
3044 |
EXPORT_SYMBOL(kernel_getsockname); |
ac5a488ef
|
3045 3046 3047 3048 3049 3050 |
int kernel_getpeername(struct socket *sock, struct sockaddr *addr, int *addrlen) { return sock->ops->getname(sock, addr, addrlen, 1); } |
c6d409cfd
|
3051 |
EXPORT_SYMBOL(kernel_getpeername); |
ac5a488ef
|
3052 3053 3054 3055 3056 |
int kernel_getsockopt(struct socket *sock, int level, int optname, char *optval, int *optlen) { mm_segment_t oldfs = get_fs(); |
fb8621bb6
|
3057 3058 |
char __user *uoptval; int __user *uoptlen; |
ac5a488ef
|
3059 |
int err; |
fb8621bb6
|
3060 3061 |
uoptval = (char __user __force *) optval; uoptlen = (int __user __force *) optlen; |
ac5a488ef
|
3062 3063 |
set_fs(KERNEL_DS); if (level == SOL_SOCKET) |
fb8621bb6
|
3064 |
err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
ac5a488ef
|
3065 |
else |
fb8621bb6
|
3066 3067 |
err = sock->ops->getsockopt(sock, level, optname, uoptval, uoptlen); |
ac5a488ef
|
3068 3069 3070 |
set_fs(oldfs); return err; } |
c6d409cfd
|
3071 |
EXPORT_SYMBOL(kernel_getsockopt); |
ac5a488ef
|
3072 3073 |
int kernel_setsockopt(struct socket *sock, int level, int optname, |
b7058842c
|
3074 |
char *optval, unsigned int optlen) |
ac5a488ef
|
3075 3076 |
{ mm_segment_t oldfs = get_fs(); |
fb8621bb6
|
3077 |
char __user *uoptval; |
ac5a488ef
|
3078 |
int err; |
fb8621bb6
|
3079 |
uoptval = (char __user __force *) optval; |
ac5a488ef
|
3080 3081 |
set_fs(KERNEL_DS); if (level == SOL_SOCKET) |
fb8621bb6
|
3082 |
err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
ac5a488ef
|
3083 |
else |
fb8621bb6
|
3084 |
err = sock->ops->setsockopt(sock, level, optname, uoptval, |
ac5a488ef
|
3085 3086 3087 3088 |
optlen); set_fs(oldfs); return err; } |
c6d409cfd
|
3089 |
EXPORT_SYMBOL(kernel_setsockopt); |
ac5a488ef
|
3090 3091 3092 3093 3094 3095 3096 3097 3098 |
int kernel_sendpage(struct socket *sock, struct page *page, int offset, size_t size, int flags) { if (sock->ops->sendpage) return sock->ops->sendpage(sock, page, offset, size, flags); return sock_no_sendpage(sock, page, offset, size, flags); } |
c6d409cfd
|
3099 |
EXPORT_SYMBOL(kernel_sendpage); |
ac5a488ef
|
3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 |
int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) { mm_segment_t oldfs = get_fs(); int err; set_fs(KERNEL_DS); err = sock->ops->ioctl(sock, cmd, arg); set_fs(oldfs); return err; } |
c6d409cfd
|
3112 |
EXPORT_SYMBOL(kernel_sock_ioctl); |
ac5a488ef
|
3113 |
|
91cf45f02
|
3114 3115 3116 3117 |
int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) { return sock->ops->shutdown(sock, how); } |
91cf45f02
|
3118 |
EXPORT_SYMBOL(kernel_sock_shutdown); |