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net/socket.c
95.2 KB
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// SPDX-License-Identifier: GPL-2.0-or-later |
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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 * |
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* 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> |
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#include <linux/pseudo_fs.h> |
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#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 <linux/nospec.h> |
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#include <linux/indirect_call_wrapper.h> |
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#include <linux/uaccess.h> |
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#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/termios.h> |
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#include <linux/sockios.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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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); |
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static __poll_t 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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#ifdef CONFIG_PROC_FS static void sock_show_fdinfo(struct seq_file *m, struct file *f) { struct socket *sock = f->private_data; if (sock->ops->show_fdinfo) sock->ops->show_fdinfo(m, sock); } #else #define sock_show_fdinfo NULL #endif |
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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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.show_fdinfo = sock_show_fdinfo, |
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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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/* |
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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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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 __ro_after_init; |
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static struct inode *sock_alloc_inode(struct super_block *sb) { struct socket_alloc *ei; |
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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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init_waitqueue_head(&ei->socket.wq.wait); ei->socket.wq.fasync_list = NULL; ei->socket.wq.flags = 0; |
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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; } |
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static void sock_free_inode(struct inode *inode) |
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{ |
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struct socket_alloc *ei; ei = container_of(inode, struct socket_alloc, vfs_inode); |
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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 void init_inodecache(void) |
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{ 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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BUG_ON(sock_inode_cachep == NULL); |
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} |
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static const struct super_operations sockfs_ops = { |
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.alloc_inode = sock_alloc_inode, |
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.free_inode = sock_free_inode, |
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.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 int sockfs_xattr_get(const struct xattr_handler *handler, struct dentry *dentry, struct inode *inode, const char *suffix, void *value, size_t size) { if (value) { if (dentry->d_name.len + 1 > size) return -ERANGE; memcpy(value, dentry->d_name.name, dentry->d_name.len + 1); } return dentry->d_name.len + 1; } #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) static const struct xattr_handler sockfs_xattr_handler = { .name = XATTR_NAME_SOCKPROTONAME, .get = sockfs_xattr_get, }; |
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static int sockfs_security_xattr_set(const struct xattr_handler *handler, struct dentry *dentry, struct inode *inode, const char *suffix, const void *value, size_t size, int flags) { /* Handled by LSM. */ return -EAGAIN; } static const struct xattr_handler sockfs_security_xattr_handler = { .prefix = XATTR_SECURITY_PREFIX, .set = sockfs_security_xattr_set, }; |
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static const struct xattr_handler *sockfs_xattr_handlers[] = { &sockfs_xattr_handler, |
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&sockfs_security_xattr_handler, |
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NULL }; |
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static int sockfs_init_fs_context(struct fs_context *fc) |
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{ |
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struct pseudo_fs_context *ctx = init_pseudo(fc, SOCKFS_MAGIC); if (!ctx) return -ENOMEM; ctx->ops = &sockfs_ops; ctx->dops = &sockfs_dentry_operations; ctx->xattr = sockfs_xattr_handlers; return 0; |
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} static struct vfsmount *sock_mnt __read_mostly; static struct file_system_type sock_fs_type = { .name = "sockfs", |
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.init_fs_context = sockfs_init_fs_context, |
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.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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/** * sock_alloc_file - Bind a &socket to a &file * @sock: socket * @flags: file status flags * @dname: protocol name * * Returns the &file bound with @sock, implicitly storing it * in sock->file. If dname is %NULL, sets to "". * On failure the return is a ERR pointer (see linux/err.h). * This function uses GFP_KERNEL internally. */ |
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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 file *file; |
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if (!dname) dname = sock->sk ? sock->sk->sk_prot_creator->name : ""; |
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file = alloc_file_pseudo(SOCK_INODE(sock), sock_mnt, dname, O_RDWR | (flags & O_NONBLOCK), &socket_file_ops); |
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if (IS_ERR(file)) { |
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sock_release(sock); |
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return file; |
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} sock->file = file; |
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file->private_data = sock; |
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stream_open(SOCK_INODE(sock), file); |
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return file; |
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} |
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EXPORT_SYMBOL(sock_alloc_file); |
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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); |
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if (unlikely(fd < 0)) { sock_release(sock); |
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return fd; |
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} |
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newfile = sock_alloc_file(sock, flags, NULL); |
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if (!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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/** * sock_from_file - Return the &socket bounded to @file. * @file: file * @err: pointer to an error code return * * On failure returns %NULL and assigns -ENOTSOCK to @err. */ |
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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 |
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* to is returned. If an error occurs the err pointer is overwritten |
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* 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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470 471 |
static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) { |
00e188ef6
|
472 |
struct fd f = fdget(fd); |
6cb153cab
|
473 |
struct socket *sock; |
3672558c6
|
474 |
*err = -EBADF; |
00e188ef6
|
475 476 477 478 |
if (f.file) { sock = sock_from_file(f.file, err); if (likely(sock)) { *fput_needed = f.flags; |
6cb153cab
|
479 |
return sock; |
00e188ef6
|
480 481 |
} fdput(f); |
1da177e4c
|
482 |
} |
6cb153cab
|
483 |
return NULL; |
1da177e4c
|
484 |
} |
600e17792
|
485 486 487 488 489 |
static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, size_t size) { ssize_t len; ssize_t used = 0; |
c5ef60352
|
490 |
len = security_inode_listsecurity(d_inode(dentry), buffer, size); |
600e17792
|
491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 |
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; } |
dc647ec88
|
511 |
static int sockfs_setattr(struct dentry *dentry, struct iattr *iattr) |
86741ec25
|
512 513 |
{ int err = simple_setattr(dentry, iattr); |
e1a3a60a2
|
514 |
if (!err && (iattr->ia_valid & ATTR_UID)) { |
86741ec25
|
515 |
struct socket *sock = SOCKET_I(d_inode(dentry)); |
6d8c50dcb
|
516 517 518 519 |
if (sock->sk) sock->sk->sk_uid = iattr->ia_uid; else err = -ENOENT; |
86741ec25
|
520 521 522 523 |
} return err; } |
600e17792
|
524 |
static const struct inode_operations sockfs_inode_ops = { |
600e17792
|
525 |
.listxattr = sockfs_listxattr, |
86741ec25
|
526 |
.setattr = sockfs_setattr, |
600e17792
|
527 |
}; |
1da177e4c
|
528 |
/** |
8a3c245c0
|
529 |
* sock_alloc - allocate a socket |
89bddce58
|
530 |
* |
1da177e4c
|
531 532 |
* 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 |
8a3c245c0
|
533 |
* NULL is returned. This functions uses GFP_KERNEL internally. |
1da177e4c
|
534 |
*/ |
f4a00aacd
|
535 |
struct socket *sock_alloc(void) |
1da177e4c
|
536 |
{ |
89bddce58
|
537 538 |
struct inode *inode; struct socket *sock; |
1da177e4c
|
539 |
|
a209dfc7b
|
540 |
inode = new_inode_pseudo(sock_mnt->mnt_sb); |
1da177e4c
|
541 542 543 544 |
if (!inode) return NULL; sock = SOCKET_I(inode); |
85fe4025c
|
545 |
inode->i_ino = get_next_ino(); |
89bddce58
|
546 |
inode->i_mode = S_IFSOCK | S_IRWXUGO; |
8192b0c48
|
547 548 |
inode->i_uid = current_fsuid(); inode->i_gid = current_fsgid(); |
600e17792
|
549 |
inode->i_op = &sockfs_inode_ops; |
1da177e4c
|
550 |
|
1da177e4c
|
551 552 |
return sock; } |
f4a00aacd
|
553 |
EXPORT_SYMBOL(sock_alloc); |
1da177e4c
|
554 |
|
1da177e4c
|
555 |
/** |
8a3c245c0
|
556 |
* sock_release - close a socket |
1da177e4c
|
557 558 559 560 |
* @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
|
561 |
* an inode not a file. |
1da177e4c
|
562 |
*/ |
89bddce58
|
563 |
|
6d8c50dcb
|
564 |
static void __sock_release(struct socket *sock, struct inode *inode) |
1da177e4c
|
565 566 567 |
{ if (sock->ops) { struct module *owner = sock->ops->owner; |
6d8c50dcb
|
568 569 |
if (inode) inode_lock(inode); |
1da177e4c
|
570 |
sock->ops->release(sock); |
ff7b11aa4
|
571 |
sock->sk = NULL; |
6d8c50dcb
|
572 573 |
if (inode) inode_unlock(inode); |
1da177e4c
|
574 575 576 |
sock->ops = NULL; module_put(owner); } |
333f7909a
|
577 |
if (sock->wq.fasync_list) |
3410f22ea
|
578 579 |
pr_err("%s: fasync list not empty! ", __func__); |
1da177e4c
|
580 |
|
1da177e4c
|
581 582 583 584 |
if (!sock->file) { iput(SOCK_INODE(sock)); return; } |
89bddce58
|
585 |
sock->file = NULL; |
1da177e4c
|
586 |
} |
6d8c50dcb
|
587 588 589 590 591 |
void sock_release(struct socket *sock) { __sock_release(sock, NULL); } |
c6d409cfd
|
592 |
EXPORT_SYMBOL(sock_release); |
1da177e4c
|
593 |
|
c14ac9451
|
594 |
void __sock_tx_timestamp(__u16 tsflags, __u8 *tx_flags) |
20d494735
|
595 |
{ |
140c55d4b
|
596 |
u8 flags = *tx_flags; |
c14ac9451
|
597 |
if (tsflags & SOF_TIMESTAMPING_TX_HARDWARE) |
140c55d4b
|
598 |
flags |= SKBTX_HW_TSTAMP; |
c14ac9451
|
599 |
if (tsflags & SOF_TIMESTAMPING_TX_SOFTWARE) |
140c55d4b
|
600 |
flags |= SKBTX_SW_TSTAMP; |
c14ac9451
|
601 |
if (tsflags & SOF_TIMESTAMPING_TX_SCHED) |
140c55d4b
|
602 |
flags |= SKBTX_SCHED_TSTAMP; |
140c55d4b
|
603 |
*tx_flags = flags; |
20d494735
|
604 |
} |
67cc0d407
|
605 |
EXPORT_SYMBOL(__sock_tx_timestamp); |
20d494735
|
606 |
|
8c3c447b3
|
607 608 |
INDIRECT_CALLABLE_DECLARE(int inet_sendmsg(struct socket *, struct msghdr *, size_t)); |
a648a592d
|
609 610 |
INDIRECT_CALLABLE_DECLARE(int inet6_sendmsg(struct socket *, struct msghdr *, size_t)); |
d8725c86a
|
611 |
static inline int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg) |
1da177e4c
|
612 |
{ |
a648a592d
|
613 614 615 |
int ret = INDIRECT_CALL_INET(sock->ops->sendmsg, inet6_sendmsg, inet_sendmsg, sock, msg, msg_data_left(msg)); |
d8725c86a
|
616 617 |
BUG_ON(ret == -EIOCBQUEUED); return ret; |
1da177e4c
|
618 |
} |
85806af0c
|
619 620 621 622 623 624 625 626 |
/** * sock_sendmsg - send a message through @sock * @sock: socket * @msg: message to send * * Sends @msg through @sock, passing through LSM. * Returns the number of bytes sent, or an error code. */ |
d8725c86a
|
627 |
int sock_sendmsg(struct socket *sock, struct msghdr *msg) |
228e548e6
|
628 |
{ |
d8725c86a
|
629 |
int err = security_socket_sendmsg(sock, msg, |
01e97e651
|
630 |
msg_data_left(msg)); |
228e548e6
|
631 |
|
d8725c86a
|
632 |
return err ?: sock_sendmsg_nosec(sock, msg); |
0cf00c6f3
|
633 |
} |
c6d409cfd
|
634 |
EXPORT_SYMBOL(sock_sendmsg); |
1da177e4c
|
635 |
|
8a3c245c0
|
636 637 638 639 640 641 642 643 644 645 646 |
/** * kernel_sendmsg - send a message through @sock (kernel-space) * @sock: socket * @msg: message header * @vec: kernel vec * @num: vec array length * @size: total message data size * * Builds the message data with @vec and sends it through @sock. * Returns the number of bytes sent, or an error code. */ |
1da177e4c
|
647 648 649 |
int kernel_sendmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec, size_t num, size_t size) { |
aa563d7bc
|
650 |
iov_iter_kvec(&msg->msg_iter, WRITE, vec, num, size); |
d8725c86a
|
651 |
return sock_sendmsg(sock, msg); |
1da177e4c
|
652 |
} |
c6d409cfd
|
653 |
EXPORT_SYMBOL(kernel_sendmsg); |
1da177e4c
|
654 |
|
8a3c245c0
|
655 656 657 658 659 660 661 662 663 664 665 666 |
/** * kernel_sendmsg_locked - send a message through @sock (kernel-space) * @sk: sock * @msg: message header * @vec: output s/g array * @num: output s/g array length * @size: total message data size * * Builds the message data with @vec and sends it through @sock. * Returns the number of bytes sent, or an error code. * Caller must hold @sk. */ |
306b13eb3
|
667 668 669 670 671 672 |
int kernel_sendmsg_locked(struct sock *sk, struct msghdr *msg, struct kvec *vec, size_t num, size_t size) { struct socket *sock = sk->sk_socket; if (!sock->ops->sendmsg_locked) |
db5980d80
|
673 |
return sock_no_sendmsg_locked(sk, msg, size); |
306b13eb3
|
674 |
|
aa563d7bc
|
675 |
iov_iter_kvec(&msg->msg_iter, WRITE, vec, num, size); |
306b13eb3
|
676 677 678 679 |
return sock->ops->sendmsg_locked(sk, msg, msg_data_left(msg)); } EXPORT_SYMBOL(kernel_sendmsg_locked); |
8605330aa
|
680 681 682 683 684 685 686 687 688 |
static bool skb_is_err_queue(const struct sk_buff *skb) { /* pkt_type of skbs enqueued on the error queue are set to * PACKET_OUTGOING in skb_set_err_queue(). This is only safe to do * in recvmsg, since skbs received on a local socket will never * have a pkt_type of PACKET_OUTGOING. */ return skb->pkt_type == PACKET_OUTGOING; } |
b50a5c70f
|
689 690 691 692 693 |
/* On transmit, software and hardware timestamps are returned independently. * As the two skb clones share the hardware timestamp, which may be updated * before the software timestamp is received, a hardware TX timestamp may be * returned only if there is no software TX timestamp. Ignore false software * timestamps, which may be made in the __sock_recv_timestamp() call when the |
7f1bc6e95
|
694 |
* option SO_TIMESTAMP_OLD(NS) is enabled on the socket, even when the skb has a |
b50a5c70f
|
695 696 697 698 699 700 |
* hardware timestamp. */ static bool skb_is_swtx_tstamp(const struct sk_buff *skb, int false_tstamp) { return skb->tstamp && !false_tstamp && skb_is_err_queue(skb); } |
aad9c8c47
|
701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 |
static void put_ts_pktinfo(struct msghdr *msg, struct sk_buff *skb) { struct scm_ts_pktinfo ts_pktinfo; struct net_device *orig_dev; if (!skb_mac_header_was_set(skb)) return; memset(&ts_pktinfo, 0, sizeof(ts_pktinfo)); rcu_read_lock(); orig_dev = dev_get_by_napi_id(skb_napi_id(skb)); if (orig_dev) ts_pktinfo.if_index = orig_dev->ifindex; rcu_read_unlock(); ts_pktinfo.pkt_length = skb->len - skb_mac_offset(skb); put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPING_PKTINFO, sizeof(ts_pktinfo), &ts_pktinfo); } |
92f37fd2e
|
721 722 723 724 725 726 |
/* * 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
|
727 |
int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
887feae36
|
728 |
int new_tstamp = sock_flag(sk, SOCK_TSTAMP_NEW); |
9718475e6
|
729 |
struct scm_timestamping_internal tss; |
b50a5c70f
|
730 |
int empty = 1, false_tstamp = 0; |
20d494735
|
731 732 733 734 735 |
struct skb_shared_hwtstamps *shhwtstamps = skb_hwtstamps(skb); /* Race occurred between timestamp enabling and packet receiving. Fill in the current time for now. */ |
b50a5c70f
|
736 |
if (need_software_tstamp && skb->tstamp == 0) { |
20d494735
|
737 |
__net_timestamp(skb); |
b50a5c70f
|
738 739 |
false_tstamp = 1; } |
20d494735
|
740 741 742 |
if (need_software_tstamp) { if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { |
887feae36
|
743 744 745 746 747 748 749 750 751 752 753 754 755 |
if (new_tstamp) { struct __kernel_sock_timeval tv; skb_get_new_timestamp(skb, &tv); put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP_NEW, sizeof(tv), &tv); } else { struct __kernel_old_timeval tv; skb_get_timestamp(skb, &tv); put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP_OLD, sizeof(tv), &tv); } |
20d494735
|
756 |
} else { |
887feae36
|
757 758 759 760 761 762 763 |
if (new_tstamp) { struct __kernel_timespec ts; skb_get_new_timestampns(skb, &ts); put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPNS_NEW, sizeof(ts), &ts); } else { |
df1b4ba9d
|
764 |
struct __kernel_old_timespec ts; |
887feae36
|
765 766 767 768 769 |
skb_get_timestampns(skb, &ts); put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPNS_OLD, sizeof(ts), &ts); } |
20d494735
|
770 771 |
} } |
f24b9be59
|
772 |
memset(&tss, 0, sizeof(tss)); |
c199105d1
|
773 |
if ((sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE) && |
9718475e6
|
774 |
ktime_to_timespec64_cond(skb->tstamp, tss.ts + 0)) |
20d494735
|
775 |
empty = 0; |
4d276eb6a
|
776 |
if (shhwtstamps && |
b9f40e21e
|
777 |
(sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE) && |
b50a5c70f
|
778 |
!skb_is_swtx_tstamp(skb, false_tstamp) && |
9718475e6
|
779 |
ktime_to_timespec64_cond(shhwtstamps->hwtstamp, tss.ts + 2)) { |
4d276eb6a
|
780 |
empty = 0; |
aad9c8c47
|
781 782 783 784 |
if ((sk->sk_tsflags & SOF_TIMESTAMPING_OPT_PKTINFO) && !skb_is_err_queue(skb)) put_ts_pktinfo(msg, skb); } |
1c885808e
|
785 |
if (!empty) { |
9718475e6
|
786 787 788 789 |
if (sock_flag(sk, SOCK_TSTAMP_NEW)) put_cmsg_scm_timestamping64(msg, &tss); else put_cmsg_scm_timestamping(msg, &tss); |
1c885808e
|
790 |
|
8605330aa
|
791 |
if (skb_is_err_queue(skb) && skb->len && |
4ef1b2869
|
792 |
SKB_EXT_ERR(skb)->opt_stats) |
1c885808e
|
793 794 795 |
put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPING_OPT_STATS, skb->len, skb->data); } |
92f37fd2e
|
796 |
} |
7c81fd8bf
|
797 |
EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
6e3e939f3
|
798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 |
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
|
813 814 |
static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, struct sk_buff *skb) |
3b885787e
|
815 |
{ |
744d5a3e9
|
816 |
if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && SOCK_SKB_CB(skb)->dropcount) |
3b885787e
|
817 |
put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, |
744d5a3e9
|
818 |
sizeof(__u32), &SOCK_SKB_CB(skb)->dropcount); |
3b885787e
|
819 |
} |
767dd0336
|
820 |
void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
3b885787e
|
821 822 823 824 825 |
struct sk_buff *skb) { sock_recv_timestamp(msg, sk, skb); sock_recv_drops(msg, sk, skb); } |
767dd0336
|
826 |
EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
3b885787e
|
827 |
|
8c3c447b3
|
828 |
INDIRECT_CALLABLE_DECLARE(int inet_recvmsg(struct socket *, struct msghdr *, |
a648a592d
|
829 830 831 |
size_t, int)); INDIRECT_CALLABLE_DECLARE(int inet6_recvmsg(struct socket *, struct msghdr *, size_t, int)); |
1b7841404
|
832 |
static inline int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
2da62906b
|
833 |
int flags) |
1da177e4c
|
834 |
{ |
a648a592d
|
835 836 837 |
return INDIRECT_CALL_INET(sock->ops->recvmsg, inet6_recvmsg, inet_recvmsg, sock, msg, msg_data_left(msg), flags); |
1da177e4c
|
838 |
} |
85806af0c
|
839 840 841 842 843 844 845 846 847 |
/** * sock_recvmsg - receive a message from @sock * @sock: socket * @msg: message to receive * @flags: message flags * * Receives @msg from @sock, passing through LSM. Returns the total number * of bytes received, or an error. */ |
2da62906b
|
848 |
int sock_recvmsg(struct socket *sock, struct msghdr *msg, int flags) |
a2e272554
|
849 |
{ |
2da62906b
|
850 |
int err = security_socket_recvmsg(sock, msg, msg_data_left(msg), flags); |
a2e272554
|
851 |
|
2da62906b
|
852 |
return err ?: sock_recvmsg_nosec(sock, msg, flags); |
1da177e4c
|
853 |
} |
c6d409cfd
|
854 |
EXPORT_SYMBOL(sock_recvmsg); |
1da177e4c
|
855 |
|
c1249c0aa
|
856 |
/** |
8a3c245c0
|
857 858 859 860 861 862 863 |
* 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...) |
c1249c0aa
|
864 |
* |
8a3c245c0
|
865 866 867 |
* 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. |
c1249c0aa
|
868 |
* |
8a3c245c0
|
869 |
* The returned value is the total number of bytes received, or an error. |
c1249c0aa
|
870 |
*/ |
8a3c245c0
|
871 |
|
89bddce58
|
872 873 |
int kernel_recvmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec, size_t num, size_t size, int flags) |
1da177e4c
|
874 875 876 |
{ mm_segment_t oldfs = get_fs(); int result; |
aa563d7bc
|
877 |
iov_iter_kvec(&msg->msg_iter, READ, vec, num, size); |
1da177e4c
|
878 |
set_fs(KERNEL_DS); |
2da62906b
|
879 |
result = sock_recvmsg(sock, msg, flags); |
1da177e4c
|
880 881 882 |
set_fs(oldfs); return result; } |
c6d409cfd
|
883 |
EXPORT_SYMBOL(kernel_recvmsg); |
1da177e4c
|
884 |
|
ce1d4d3e8
|
885 886 |
static ssize_t sock_sendpage(struct file *file, struct page *page, int offset, size_t size, loff_t *ppos, int more) |
1da177e4c
|
887 |
{ |
1da177e4c
|
888 889 |
struct socket *sock; int flags; |
ce1d4d3e8
|
890 |
sock = file->private_data; |
35f9c09fe
|
891 892 893 |
flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ flags |= more; |
ce1d4d3e8
|
894 |
|
e69495838
|
895 |
return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e8
|
896 |
} |
1da177e4c
|
897 |
|
9c55e01c0
|
898 |
static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cfd
|
899 |
struct pipe_inode_info *pipe, size_t len, |
9c55e01c0
|
900 901 902 |
unsigned int flags) { struct socket *sock = file->private_data; |
997b37da1
|
903 |
if (unlikely(!sock->ops->splice_read)) |
95506588d
|
904 |
return generic_file_splice_read(file, ppos, pipe, len, flags); |
997b37da1
|
905 |
|
9c55e01c0
|
906 907 |
return sock->ops->splice_read(sock, ppos, pipe, len, flags); } |
8ae5e030f
|
908 |
static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to) |
ce1d4d3e8
|
909 |
{ |
6d6523302
|
910 911 |
struct file *file = iocb->ki_filp; struct socket *sock = file->private_data; |
0345f9313
|
912 913 |
struct msghdr msg = {.msg_iter = *to, .msg_iocb = iocb}; |
8ae5e030f
|
914 |
ssize_t res; |
ce1d4d3e8
|
915 |
|
ebfcd8955
|
916 |
if (file->f_flags & O_NONBLOCK || (iocb->ki_flags & IOCB_NOWAIT)) |
8ae5e030f
|
917 918 919 |
msg.msg_flags = MSG_DONTWAIT; if (iocb->ki_pos != 0) |
1da177e4c
|
920 |
return -ESPIPE; |
027445c37
|
921 |
|
66ee59af6
|
922 |
if (!iov_iter_count(to)) /* Match SYS5 behaviour */ |
1da177e4c
|
923 |
return 0; |
2da62906b
|
924 |
res = sock_recvmsg(sock, &msg, msg.msg_flags); |
8ae5e030f
|
925 926 |
*to = msg.msg_iter; return res; |
1da177e4c
|
927 |
} |
8ae5e030f
|
928 |
static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from) |
ce1d4d3e8
|
929 |
{ |
6d6523302
|
930 931 |
struct file *file = iocb->ki_filp; struct socket *sock = file->private_data; |
0345f9313
|
932 933 |
struct msghdr msg = {.msg_iter = *from, .msg_iocb = iocb}; |
8ae5e030f
|
934 |
ssize_t res; |
1da177e4c
|
935 |
|
8ae5e030f
|
936 |
if (iocb->ki_pos != 0) |
ce1d4d3e8
|
937 |
return -ESPIPE; |
027445c37
|
938 |
|
ebfcd8955
|
939 |
if (file->f_flags & O_NONBLOCK || (iocb->ki_flags & IOCB_NOWAIT)) |
8ae5e030f
|
940 |
msg.msg_flags = MSG_DONTWAIT; |
6d6523302
|
941 942 |
if (sock->type == SOCK_SEQPACKET) msg.msg_flags |= MSG_EOR; |
d8725c86a
|
943 |
res = sock_sendmsg(sock, &msg); |
8ae5e030f
|
944 945 |
*from = msg.msg_iter; return res; |
1da177e4c
|
946 |
} |
1da177e4c
|
947 948 949 950 |
/* * Atomic setting of ioctl hooks to avoid race * with module unload. */ |
4a3e2f711
|
951 |
static DEFINE_MUTEX(br_ioctl_mutex); |
c6d409cfd
|
952 |
static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); |
1da177e4c
|
953 |
|
881d966b4
|
954 |
void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4c
|
955 |
{ |
4a3e2f711
|
956 |
mutex_lock(&br_ioctl_mutex); |
1da177e4c
|
957 |
br_ioctl_hook = hook; |
4a3e2f711
|
958 |
mutex_unlock(&br_ioctl_mutex); |
1da177e4c
|
959 960 |
} EXPORT_SYMBOL(brioctl_set); |
4a3e2f711
|
961 |
static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b4
|
962 |
static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4c
|
963 |
|
881d966b4
|
964 |
void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4c
|
965 |
{ |
4a3e2f711
|
966 |
mutex_lock(&vlan_ioctl_mutex); |
1da177e4c
|
967 |
vlan_ioctl_hook = hook; |
4a3e2f711
|
968 |
mutex_unlock(&vlan_ioctl_mutex); |
1da177e4c
|
969 970 |
} EXPORT_SYMBOL(vlan_ioctl_set); |
4a3e2f711
|
971 |
static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce58
|
972 |
static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4c
|
973 |
|
89bddce58
|
974 |
void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4c
|
975 |
{ |
4a3e2f711
|
976 |
mutex_lock(&dlci_ioctl_mutex); |
1da177e4c
|
977 |
dlci_ioctl_hook = hook; |
4a3e2f711
|
978 |
mutex_unlock(&dlci_ioctl_mutex); |
1da177e4c
|
979 980 |
} EXPORT_SYMBOL(dlci_ioctl_set); |
6b96018b2
|
981 |
static long sock_do_ioctl(struct net *net, struct socket *sock, |
63ff03ab7
|
982 |
unsigned int cmd, unsigned long arg) |
6b96018b2
|
983 984 985 986 987 988 989 990 991 992 |
{ 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. */ |
36fd633ec
|
993 994 |
if (err != -ENOIOCTLCMD) return err; |
6b96018b2
|
995 |
|
36fd633ec
|
996 997 998 999 1000 1001 1002 1003 1004 |
if (cmd == SIOCGIFCONF) { struct ifconf ifc; if (copy_from_user(&ifc, argp, sizeof(struct ifconf))) return -EFAULT; rtnl_lock(); err = dev_ifconf(net, &ifc, sizeof(struct ifreq)); rtnl_unlock(); if (!err && copy_to_user(argp, &ifc, sizeof(struct ifconf))) err = -EFAULT; |
44c02a2c3
|
1005 1006 1007 |
} else { struct ifreq ifr; bool need_copyout; |
63ff03ab7
|
1008 |
if (copy_from_user(&ifr, argp, sizeof(struct ifreq))) |
44c02a2c3
|
1009 1010 1011 |
return -EFAULT; err = dev_ioctl(net, cmd, &ifr, &need_copyout); if (!err && need_copyout) |
63ff03ab7
|
1012 |
if (copy_to_user(argp, &ifr, sizeof(struct ifreq))) |
44c02a2c3
|
1013 |
return -EFAULT; |
36fd633ec
|
1014 |
} |
6b96018b2
|
1015 1016 |
return err; } |
1da177e4c
|
1017 1018 1019 1020 |
/* * 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. */ |
8a3c245c0
|
1021 1022 1023 1024 1025 1026 |
/** * get_net_ns - increment the refcount of the network namespace * @ns: common namespace (net) * * Returns the net's common namespace. */ |
d8d211a2a
|
1027 |
struct ns_common *get_net_ns(struct ns_common *ns) |
c62cce2ca
|
1028 1029 1030 |
{ return &get_net(container_of(ns, struct net, ns))->ns; } |
d8d211a2a
|
1031 |
EXPORT_SYMBOL_GPL(get_net_ns); |
c62cce2ca
|
1032 |
|
1da177e4c
|
1033 1034 1035 |
static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) { struct socket *sock; |
881d966b4
|
1036 |
struct sock *sk; |
1da177e4c
|
1037 1038 |
void __user *argp = (void __user *)arg; int pid, err; |
881d966b4
|
1039 |
struct net *net; |
1da177e4c
|
1040 |
|
b69aee04f
|
1041 |
sock = file->private_data; |
881d966b4
|
1042 |
sk = sock->sk; |
3b1e0a655
|
1043 |
net = sock_net(sk); |
44c02a2c3
|
1044 1045 1046 1047 1048 1049 1050 1051 1052 |
if (unlikely(cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15))) { struct ifreq ifr; bool need_copyout; if (copy_from_user(&ifr, argp, sizeof(struct ifreq))) return -EFAULT; err = dev_ioctl(net, cmd, &ifr, &need_copyout); if (!err && need_copyout) if (copy_to_user(argp, &ifr, sizeof(struct ifreq))) return -EFAULT; |
1da177e4c
|
1053 |
} else |
3d23e349d
|
1054 |
#ifdef CONFIG_WEXT_CORE |
1da177e4c
|
1055 |
if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
b1b0c2450
|
1056 |
err = wext_handle_ioctl(net, cmd, argp); |
1da177e4c
|
1057 |
} else |
3d23e349d
|
1058 |
#endif |
89bddce58
|
1059 |
switch (cmd) { |
1da177e4c
|
1060 1061 1062 1063 1064 |
case FIOSETOWN: case SIOCSPGRP: err = -EFAULT; if (get_user(pid, (int __user *)argp)) break; |
393cc3f51
|
1065 |
err = f_setown(sock->file, pid, 1); |
1da177e4c
|
1066 1067 1068 |
break; case FIOGETOWN: case SIOCGPGRP: |
609d7fa95
|
1069 |
err = put_user(f_getown(sock->file), |
89bddce58
|
1070 |
(int __user *)argp); |
1da177e4c
|
1071 1072 1073 1074 1075 1076 1077 1078 |
break; case SIOCGIFBR: case SIOCSIFBR: case SIOCBRADDBR: case SIOCBRDELBR: err = -ENOPKG; if (!br_ioctl_hook) request_module("bridge"); |
4a3e2f711
|
1079 |
mutex_lock(&br_ioctl_mutex); |
89bddce58
|
1080 |
if (br_ioctl_hook) |
881d966b4
|
1081 |
err = br_ioctl_hook(net, cmd, argp); |
4a3e2f711
|
1082 |
mutex_unlock(&br_ioctl_mutex); |
1da177e4c
|
1083 1084 1085 1086 1087 1088 |
break; case SIOCGIFVLAN: case SIOCSIFVLAN: err = -ENOPKG; if (!vlan_ioctl_hook) request_module("8021q"); |
4a3e2f711
|
1089 |
mutex_lock(&vlan_ioctl_mutex); |
1da177e4c
|
1090 |
if (vlan_ioctl_hook) |
881d966b4
|
1091 |
err = vlan_ioctl_hook(net, argp); |
4a3e2f711
|
1092 |
mutex_unlock(&vlan_ioctl_mutex); |
1da177e4c
|
1093 |
break; |
1da177e4c
|
1094 1095 1096 1097 1098 |
case SIOCADDDLCI: case SIOCDELDLCI: err = -ENOPKG; if (!dlci_ioctl_hook) request_module("dlci"); |
7512cbf6e
|
1099 1100 |
mutex_lock(&dlci_ioctl_mutex); if (dlci_ioctl_hook) |
1da177e4c
|
1101 |
err = dlci_ioctl_hook(cmd, argp); |
7512cbf6e
|
1102 |
mutex_unlock(&dlci_ioctl_mutex); |
1da177e4c
|
1103 |
break; |
c62cce2ca
|
1104 1105 1106 1107 1108 1109 1110 |
case SIOCGSKNS: err = -EPERM; if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) break; err = open_related_ns(&net->ns, get_net_ns); break; |
0768e1707
|
1111 1112 |
case SIOCGSTAMP_OLD: case SIOCGSTAMPNS_OLD: |
c7cbdbf29
|
1113 1114 1115 1116 1117 |
if (!sock->ops->gettstamp) { err = -ENOIOCTLCMD; break; } err = sock->ops->gettstamp(sock, argp, |
0768e1707
|
1118 1119 |
cmd == SIOCGSTAMP_OLD, !IS_ENABLED(CONFIG_64BIT)); |
60747828e
|
1120 |
break; |
0768e1707
|
1121 1122 1123 1124 1125 1126 1127 1128 1129 |
case SIOCGSTAMP_NEW: case SIOCGSTAMPNS_NEW: if (!sock->ops->gettstamp) { err = -ENOIOCTLCMD; break; } err = sock->ops->gettstamp(sock, argp, cmd == SIOCGSTAMP_NEW, false); |
c7cbdbf29
|
1130 |
break; |
1da177e4c
|
1131 |
default: |
63ff03ab7
|
1132 |
err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4c
|
1133 |
break; |
89bddce58
|
1134 |
} |
1da177e4c
|
1135 1136 |
return err; } |
8a3c245c0
|
1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 |
/** * sock_create_lite - creates a socket * @family: protocol family (AF_INET, ...) * @type: communication type (SOCK_STREAM, ...) * @protocol: protocol (0, ...) * @res: new socket * * Creates a new socket and assigns it to @res, passing through LSM. * The new socket initialization is not complete, see kernel_accept(). * Returns 0 or an error. On failure @res is set to %NULL. * This function internally uses GFP_KERNEL. */ |
1da177e4c
|
1149 1150 1151 1152 |
int sock_create_lite(int family, int type, int protocol, struct socket **res) { int err; struct socket *sock = NULL; |
89bddce58
|
1153 |
|
1da177e4c
|
1154 1155 1156 1157 1158 1159 1160 1161 1162 |
err = security_socket_create(family, type, protocol, 1); if (err) goto out; sock = sock_alloc(); if (!sock) { err = -ENOMEM; goto out; } |
1da177e4c
|
1163 |
sock->type = type; |
7420ed23a
|
1164 1165 1166 |
err = security_socket_post_create(sock, family, type, protocol, 1); if (err) goto out_release; |
1da177e4c
|
1167 1168 1169 |
out: *res = sock; return err; |
7420ed23a
|
1170 1171 1172 1173 |
out_release: sock_release(sock); sock = NULL; goto out; |
1da177e4c
|
1174 |
} |
c6d409cfd
|
1175 |
EXPORT_SYMBOL(sock_create_lite); |
1da177e4c
|
1176 1177 |
/* No kernel lock held - perfect */ |
ade994f4f
|
1178 |
static __poll_t sock_poll(struct file *file, poll_table *wait) |
1da177e4c
|
1179 |
{ |
3cafb3763
|
1180 |
struct socket *sock = file->private_data; |
a331de3bf
|
1181 |
__poll_t events = poll_requested_events(wait), flag = 0; |
2d48d67fa
|
1182 |
|
e88958e63
|
1183 1184 |
if (!sock->ops->poll) return 0; |
f641f13b9
|
1185 |
|
a331de3bf
|
1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 |
if (sk_can_busy_loop(sock->sk)) { /* poll once if requested by the syscall */ if (events & POLL_BUSY_LOOP) sk_busy_loop(sock->sk, 1); /* if this socket can poll_ll, tell the system call */ flag = POLL_BUSY_LOOP; } return sock->ops->poll(file, sock, wait) | flag; |
1da177e4c
|
1196 |
} |
89bddce58
|
1197 |
static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4c
|
1198 |
{ |
b69aee04f
|
1199 |
struct socket *sock = file->private_data; |
1da177e4c
|
1200 1201 1202 |
return sock->ops->mmap(file, sock, vma); } |
20380731b
|
1203 |
static int sock_close(struct inode *inode, struct file *filp) |
1da177e4c
|
1204 |
{ |
6d8c50dcb
|
1205 |
__sock_release(SOCKET_I(inode), inode); |
1da177e4c
|
1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 |
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
|
1217 |
* or under socket lock |
1da177e4c
|
1218 1219 1220 1221 |
*/ static int sock_fasync(int fd, struct file *filp, int on) { |
989a29792
|
1222 1223 |
struct socket *sock = filp->private_data; struct sock *sk = sock->sk; |
333f7909a
|
1224 |
struct socket_wq *wq = &sock->wq; |
1da177e4c
|
1225 |
|
989a29792
|
1226 |
if (sk == NULL) |
1da177e4c
|
1227 |
return -EINVAL; |
1da177e4c
|
1228 1229 |
lock_sock(sk); |
eaefd1105
|
1230 |
fasync_helper(fd, filp, on, &wq->fasync_list); |
1da177e4c
|
1231 |
|
eaefd1105
|
1232 |
if (!wq->fasync_list) |
989a29792
|
1233 1234 |
sock_reset_flag(sk, SOCK_FASYNC); else |
bcdce7195
|
1235 |
sock_set_flag(sk, SOCK_FASYNC); |
1da177e4c
|
1236 |
|
989a29792
|
1237 |
release_sock(sk); |
1da177e4c
|
1238 1239 |
return 0; } |
ceb5d58b2
|
1240 |
/* This function may be called only under rcu_lock */ |
1da177e4c
|
1241 |
|
ceb5d58b2
|
1242 |
int sock_wake_async(struct socket_wq *wq, int how, int band) |
1da177e4c
|
1243 |
{ |
ceb5d58b2
|
1244 |
if (!wq || !wq->fasync_list) |
1da177e4c
|
1245 |
return -1; |
ceb5d58b2
|
1246 |
|
89bddce58
|
1247 |
switch (how) { |
8d8ad9d7c
|
1248 |
case SOCK_WAKE_WAITD: |
ceb5d58b2
|
1249 |
if (test_bit(SOCKWQ_ASYNC_WAITDATA, &wq->flags)) |
1da177e4c
|
1250 1251 |
break; goto call_kill; |
8d8ad9d7c
|
1252 |
case SOCK_WAKE_SPACE: |
ceb5d58b2
|
1253 |
if (!test_and_clear_bit(SOCKWQ_ASYNC_NOSPACE, &wq->flags)) |
1da177e4c
|
1254 1255 |
break; /* fall through */ |
8d8ad9d7c
|
1256 |
case SOCK_WAKE_IO: |
89bddce58
|
1257 |
call_kill: |
438154823
|
1258 |
kill_fasync(&wq->fasync_list, SIGIO, band); |
1da177e4c
|
1259 |
break; |
8d8ad9d7c
|
1260 |
case SOCK_WAKE_URG: |
438154823
|
1261 |
kill_fasync(&wq->fasync_list, SIGURG, band); |
1da177e4c
|
1262 |
} |
ceb5d58b2
|
1263 |
|
1da177e4c
|
1264 1265 |
return 0; } |
c6d409cfd
|
1266 |
EXPORT_SYMBOL(sock_wake_async); |
1da177e4c
|
1267 |
|
8a3c245c0
|
1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 |
/** * __sock_create - creates a socket * @net: net namespace * @family: protocol family (AF_INET, ...) * @type: communication type (SOCK_STREAM, ...) * @protocol: protocol (0, ...) * @res: new socket * @kern: boolean for kernel space sockets * * Creates a new socket and assigns it to @res, passing through LSM. * Returns 0 or an error. On failure @res is set to %NULL. @kern must * be set to true if the socket resides in kernel space. * This function internally uses GFP_KERNEL. */ |
721db93a5
|
1282 |
int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce58
|
1283 |
struct socket **res, int kern) |
1da177e4c
|
1284 1285 1286 |
{ int err; struct socket *sock; |
55737fda0
|
1287 |
const struct net_proto_family *pf; |
1da177e4c
|
1288 1289 |
/* |
89bddce58
|
1290 |
* Check protocol is in range |
1da177e4c
|
1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 |
*/ 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
|
1303 1304 1305 |
pr_info_once("%s uses obsolete (PF_INET,SOCK_PACKET) ", current->comm); |
1da177e4c
|
1306 1307 1308 1309 1310 1311 |
family = PF_PACKET; } err = security_socket_create(family, type, protocol, kern); if (err) return err; |
89bddce58
|
1312 |
|
55737fda0
|
1313 1314 1315 1316 1317 1318 1319 |
/* * 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
|
1320 1321 |
net_warn_ratelimited("socket: no more sockets "); |
55737fda0
|
1322 1323 1324 1325 1326 |
return -ENFILE; /* Not exactly a match, but its the closest posix thing */ } sock->type = type; |
95a5afca4
|
1327 |
#ifdef CONFIG_MODULES |
89bddce58
|
1328 1329 1330 |
/* Attempt to load a protocol module if the find failed. * * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user |
1da177e4c
|
1331 1332 1333 |
* requested real, full-featured networking support upon configuration. * Otherwise module support will break! */ |
190683a9d
|
1334 |
if (rcu_access_pointer(net_families[family]) == NULL) |
89bddce58
|
1335 |
request_module("net-pf-%d", family); |
1da177e4c
|
1336 |
#endif |
55737fda0
|
1337 1338 1339 1340 1341 |
rcu_read_lock(); pf = rcu_dereference(net_families[family]); err = -EAFNOSUPPORT; if (!pf) goto out_release; |
1da177e4c
|
1342 1343 1344 1345 1346 |
/* * We will call the ->create function, that possibly is in a loadable * module, so we have to bump that loadable module refcnt first. */ |
55737fda0
|
1347 |
if (!try_module_get(pf->owner)) |
1da177e4c
|
1348 |
goto out_release; |
55737fda0
|
1349 1350 |
/* Now protected by module ref count */ rcu_read_unlock(); |
3f378b684
|
1351 |
err = pf->create(net, sock, protocol, kern); |
55737fda0
|
1352 |
if (err < 0) |
1da177e4c
|
1353 |
goto out_module_put; |
a79af59ef
|
1354 |
|
1da177e4c
|
1355 1356 1357 1358 |
/* * Now to bump the refcnt of the [loadable] module that owns this * socket at sock_release time we decrement its refcnt. */ |
55737fda0
|
1359 1360 |
if (!try_module_get(sock->ops->owner)) goto out_module_busy; |
1da177e4c
|
1361 1362 1363 1364 |
/* * Now that we're done with the ->create function, the [loadable] * module can have its refcnt decremented */ |
55737fda0
|
1365 |
module_put(pf->owner); |
7420ed23a
|
1366 1367 |
err = security_socket_post_create(sock, family, type, protocol, kern); if (err) |
3b1855255
|
1368 |
goto out_sock_release; |
55737fda0
|
1369 |
*res = sock; |
1da177e4c
|
1370 |
|
55737fda0
|
1371 1372 1373 1374 |
return 0; out_module_busy: err = -EAFNOSUPPORT; |
1da177e4c
|
1375 |
out_module_put: |
55737fda0
|
1376 1377 1378 |
sock->ops = NULL; module_put(pf->owner); out_sock_release: |
1da177e4c
|
1379 |
sock_release(sock); |
55737fda0
|
1380 1381 1382 1383 1384 |
return err; out_release: rcu_read_unlock(); goto out_sock_release; |
1da177e4c
|
1385 |
} |
721db93a5
|
1386 |
EXPORT_SYMBOL(__sock_create); |
1da177e4c
|
1387 |
|
8a3c245c0
|
1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 |
/** * sock_create - creates a socket * @family: protocol family (AF_INET, ...) * @type: communication type (SOCK_STREAM, ...) * @protocol: protocol (0, ...) * @res: new socket * * A wrapper around __sock_create(). * Returns 0 or an error. This function internally uses GFP_KERNEL. */ |
1da177e4c
|
1398 1399 |
int sock_create(int family, int type, int protocol, struct socket **res) { |
1b8d7ae42
|
1400 |
return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4c
|
1401 |
} |
c6d409cfd
|
1402 |
EXPORT_SYMBOL(sock_create); |
1da177e4c
|
1403 |
|
8a3c245c0
|
1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 |
/** * sock_create_kern - creates a socket (kernel space) * @net: net namespace * @family: protocol family (AF_INET, ...) * @type: communication type (SOCK_STREAM, ...) * @protocol: protocol (0, ...) * @res: new socket * * A wrapper around __sock_create(). * Returns 0 or an error. This function internally uses GFP_KERNEL. */ |
eeb1bd5c4
|
1415 |
int sock_create_kern(struct net *net, int family, int type, int protocol, struct socket **res) |
1da177e4c
|
1416 |
{ |
eeb1bd5c4
|
1417 |
return __sock_create(net, family, type, protocol, res, 1); |
1da177e4c
|
1418 |
} |
c6d409cfd
|
1419 |
EXPORT_SYMBOL(sock_create_kern); |
1da177e4c
|
1420 |
|
9d6a15c3f
|
1421 |
int __sys_socket(int family, int type, int protocol) |
1da177e4c
|
1422 1423 1424 |
{ int retval; struct socket *sock; |
a677a039b
|
1425 |
int flags; |
e38b36f32
|
1426 1427 1428 1429 1430 |
/* 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
|
1431 |
flags = type & ~SOCK_TYPE_MASK; |
77d272005
|
1432 |
if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039b
|
1433 1434 |
return -EINVAL; type &= SOCK_TYPE_MASK; |
1da177e4c
|
1435 |
|
aaca0bdca
|
1436 1437 |
if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
1da177e4c
|
1438 1439 |
retval = sock_create(family, type, protocol, &sock); if (retval < 0) |
8e1611e23
|
1440 |
return retval; |
1da177e4c
|
1441 |
|
8e1611e23
|
1442 |
return sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4c
|
1443 |
} |
9d6a15c3f
|
1444 1445 1446 1447 |
SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) { return __sys_socket(family, type, protocol); } |
1da177e4c
|
1448 1449 1450 |
/* * Create a pair of connected sockets. */ |
6debc8d83
|
1451 |
int __sys_socketpair(int family, int type, int protocol, int __user *usockvec) |
1da177e4c
|
1452 1453 1454 |
{ struct socket *sock1, *sock2; int fd1, fd2, err; |
db3495099
|
1455 |
struct file *newfile1, *newfile2; |
a677a039b
|
1456 1457 1458 |
int flags; flags = type & ~SOCK_TYPE_MASK; |
77d272005
|
1459 |
if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039b
|
1460 1461 |
return -EINVAL; type &= SOCK_TYPE_MASK; |
1da177e4c
|
1462 |
|
aaca0bdca
|
1463 1464 |
if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
1da177e4c
|
1465 |
/* |
016a266bd
|
1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 |
* reserve descriptors and make sure we won't fail * to return them to userland. */ fd1 = get_unused_fd_flags(flags); if (unlikely(fd1 < 0)) return fd1; fd2 = get_unused_fd_flags(flags); if (unlikely(fd2 < 0)) { put_unused_fd(fd1); return fd2; } err = put_user(fd1, &usockvec[0]); if (err) goto out; err = put_user(fd2, &usockvec[1]); if (err) goto out; /* |
1da177e4c
|
1488 1489 1490 1491 1492 |
* Obtain the first socket and check if the underlying protocol * supports the socketpair call. */ err = sock_create(family, type, protocol, &sock1); |
016a266bd
|
1493 |
if (unlikely(err < 0)) |
1da177e4c
|
1494 1495 1496 |
goto out; err = sock_create(family, type, protocol, &sock2); |
016a266bd
|
1497 1498 1499 |
if (unlikely(err < 0)) { sock_release(sock1); goto out; |
bf3c23d17
|
1500 |
} |
d73aa2867
|
1501 |
|
d47cd9450
|
1502 1503 1504 1505 1506 1507 |
err = security_socket_socketpair(sock1, sock2); if (unlikely(err)) { sock_release(sock2); sock_release(sock1); goto out; } |
016a266bd
|
1508 1509 1510 1511 1512 |
err = sock1->ops->socketpair(sock1, sock2); if (unlikely(err < 0)) { sock_release(sock2); sock_release(sock1); goto out; |
284076305
|
1513 |
} |
aab174f0d
|
1514 |
newfile1 = sock_alloc_file(sock1, flags, NULL); |
b5ffe6344
|
1515 |
if (IS_ERR(newfile1)) { |
284076305
|
1516 |
err = PTR_ERR(newfile1); |
016a266bd
|
1517 1518 |
sock_release(sock2); goto out; |
284076305
|
1519 |
} |
aab174f0d
|
1520 |
newfile2 = sock_alloc_file(sock2, flags, NULL); |
284076305
|
1521 1522 |
if (IS_ERR(newfile2)) { err = PTR_ERR(newfile2); |
016a266bd
|
1523 1524 |
fput(newfile1); goto out; |
db3495099
|
1525 |
} |
157cf649a
|
1526 |
audit_fd_pair(fd1, fd2); |
d73aa2867
|
1527 |
|
db3495099
|
1528 1529 |
fd_install(fd1, newfile1); fd_install(fd2, newfile2); |
d73aa2867
|
1530 |
return 0; |
1da177e4c
|
1531 |
|
016a266bd
|
1532 |
out: |
d73aa2867
|
1533 |
put_unused_fd(fd2); |
d73aa2867
|
1534 |
put_unused_fd(fd1); |
1da177e4c
|
1535 1536 |
return err; } |
6debc8d83
|
1537 1538 1539 1540 1541 |
SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, int __user *, usockvec) { return __sys_socketpair(family, type, protocol, usockvec); } |
1da177e4c
|
1542 1543 1544 1545 1546 1547 1548 |
/* * 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). */ |
a87d35d87
|
1549 |
int __sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen) |
1da177e4c
|
1550 1551 |
{ struct socket *sock; |
230b18392
|
1552 |
struct sockaddr_storage address; |
6cb153cab
|
1553 |
int err, fput_needed; |
1da177e4c
|
1554 |
|
89bddce58
|
1555 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783a
|
1556 |
if (sock) { |
43db362d3
|
1557 |
err = move_addr_to_kernel(umyaddr, addrlen, &address); |
068b88cc1
|
1558 |
if (!err) { |
89bddce58
|
1559 |
err = security_socket_bind(sock, |
230b18392
|
1560 |
(struct sockaddr *)&address, |
89bddce58
|
1561 |
addrlen); |
6cb153cab
|
1562 1563 |
if (!err) err = sock->ops->bind(sock, |
89bddce58
|
1564 |
(struct sockaddr *) |
230b18392
|
1565 |
&address, addrlen); |
1da177e4c
|
1566 |
} |
6cb153cab
|
1567 |
fput_light(sock->file, fput_needed); |
89bddce58
|
1568 |
} |
1da177e4c
|
1569 1570 |
return err; } |
a87d35d87
|
1571 1572 1573 1574 |
SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) { return __sys_bind(fd, umyaddr, addrlen); } |
1da177e4c
|
1575 1576 1577 1578 1579 |
/* * 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. */ |
25e290eed
|
1580 |
int __sys_listen(int fd, int backlog) |
1da177e4c
|
1581 1582 |
{ struct socket *sock; |
6cb153cab
|
1583 |
int err, fput_needed; |
b8e1f9b5c
|
1584 |
int somaxconn; |
89bddce58
|
1585 1586 1587 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); if (sock) { |
8efa6e93c
|
1588 |
somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
95c961747
|
1589 |
if ((unsigned int)backlog > somaxconn) |
b8e1f9b5c
|
1590 |
backlog = somaxconn; |
1da177e4c
|
1591 1592 |
err = security_socket_listen(sock, backlog); |
6cb153cab
|
1593 1594 |
if (!err) err = sock->ops->listen(sock, backlog); |
1da177e4c
|
1595 |
|
6cb153cab
|
1596 |
fput_light(sock->file, fput_needed); |
1da177e4c
|
1597 1598 1599 |
} return err; } |
25e290eed
|
1600 1601 1602 1603 |
SYSCALL_DEFINE2(listen, int, fd, int, backlog) { return __sys_listen(fd, backlog); } |
de2ea4b64
|
1604 1605 1606 |
int __sys_accept4_file(struct file *file, unsigned file_flags, struct sockaddr __user *upeer_sockaddr, int __user *upeer_addrlen, int flags) |
1da177e4c
|
1607 1608 |
{ struct socket *sock, *newsock; |
39d8c1b6f
|
1609 |
struct file *newfile; |
de2ea4b64
|
1610 |
int err, len, newfd; |
230b18392
|
1611 |
struct sockaddr_storage address; |
1da177e4c
|
1612 |
|
77d272005
|
1613 |
if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdca
|
1614 1615 1616 1617 |
return -EINVAL; if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
de2ea4b64
|
1618 |
sock = sock_from_file(file, &err); |
1da177e4c
|
1619 1620 1621 1622 |
if (!sock) goto out; err = -ENFILE; |
c6d409cfd
|
1623 1624 |
newsock = sock_alloc(); if (!newsock) |
de2ea4b64
|
1625 |
goto out; |
1da177e4c
|
1626 1627 1628 |
newsock->type = sock->type; newsock->ops = sock->ops; |
1da177e4c
|
1629 1630 1631 1632 1633 |
/* * 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
|
1634 |
newfd = get_unused_fd_flags(flags); |
39d8c1b6f
|
1635 1636 |
if (unlikely(newfd < 0)) { err = newfd; |
9a1875e60
|
1637 |
sock_release(newsock); |
de2ea4b64
|
1638 |
goto out; |
39d8c1b6f
|
1639 |
} |
aab174f0d
|
1640 |
newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); |
b5ffe6344
|
1641 |
if (IS_ERR(newfile)) { |
284076305
|
1642 1643 |
err = PTR_ERR(newfile); put_unused_fd(newfd); |
de2ea4b64
|
1644 |
goto out; |
284076305
|
1645 |
} |
39d8c1b6f
|
1646 |
|
a79af59ef
|
1647 1648 |
err = security_socket_accept(sock, newsock); if (err) |
39d8c1b6f
|
1649 |
goto out_fd; |
a79af59ef
|
1650 |
|
de2ea4b64
|
1651 1652 |
err = sock->ops->accept(sock, newsock, sock->file->f_flags | file_flags, false); |
1da177e4c
|
1653 |
if (err < 0) |
39d8c1b6f
|
1654 |
goto out_fd; |
1da177e4c
|
1655 1656 |
if (upeer_sockaddr) { |
9b2c45d47
|
1657 1658 1659 |
len = newsock->ops->getname(newsock, (struct sockaddr *)&address, 2); if (len < 0) { |
1da177e4c
|
1660 |
err = -ECONNABORTED; |
39d8c1b6f
|
1661 |
goto out_fd; |
1da177e4c
|
1662 |
} |
43db362d3
|
1663 |
err = move_addr_to_user(&address, |
230b18392
|
1664 |
len, upeer_sockaddr, upeer_addrlen); |
1da177e4c
|
1665 |
if (err < 0) |
39d8c1b6f
|
1666 |
goto out_fd; |
1da177e4c
|
1667 1668 1669 |
} /* File flags are not inherited via accept() unlike another OSes. */ |
39d8c1b6f
|
1670 1671 |
fd_install(newfd, newfile); err = newfd; |
1da177e4c
|
1672 1673 |
out: return err; |
39d8c1b6f
|
1674 |
out_fd: |
9606a2163
|
1675 |
fput(newfile); |
39d8c1b6f
|
1676 |
put_unused_fd(newfd); |
de2ea4b64
|
1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 |
goto out; } /* * 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 restructure accept also. */ int __sys_accept4(int fd, struct sockaddr __user *upeer_sockaddr, int __user *upeer_addrlen, int flags) { int ret = -EBADF; struct fd f; f = fdget(fd); if (f.file) { ret = __sys_accept4_file(f.file, 0, upeer_sockaddr, upeer_addrlen, flags); if (f.flags) fput(f.file); } return ret; |
1da177e4c
|
1708 |
} |
4541e8056
|
1709 1710 1711 1712 1713 |
SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, int __user *, upeer_addrlen, int, flags) { return __sys_accept4(fd, upeer_sockaddr, upeer_addrlen, flags); } |
20f37034f
|
1714 1715 |
SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, int __user *, upeer_addrlen) |
aaca0bdca
|
1716 |
{ |
4541e8056
|
1717 |
return __sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdca
|
1718 |
} |
1da177e4c
|
1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 |
/* * 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. */ |
f499a021e
|
1730 |
int __sys_connect_file(struct file *file, struct sockaddr_storage *address, |
bd3ded314
|
1731 |
int addrlen, int file_flags) |
1da177e4c
|
1732 1733 |
{ struct socket *sock; |
bd3ded314
|
1734 |
int err; |
1da177e4c
|
1735 |
|
bd3ded314
|
1736 |
sock = sock_from_file(file, &err); |
1da177e4c
|
1737 1738 |
if (!sock) goto out; |
1da177e4c
|
1739 |
|
89bddce58
|
1740 |
err = |
f499a021e
|
1741 |
security_socket_connect(sock, (struct sockaddr *)address, addrlen); |
1da177e4c
|
1742 |
if (err) |
bd3ded314
|
1743 |
goto out; |
1da177e4c
|
1744 |
|
f499a021e
|
1745 |
err = sock->ops->connect(sock, (struct sockaddr *)address, addrlen, |
bd3ded314
|
1746 |
sock->file->f_flags | file_flags); |
1da177e4c
|
1747 1748 1749 |
out: return err; } |
bd3ded314
|
1750 1751 1752 1753 1754 1755 1756 |
int __sys_connect(int fd, struct sockaddr __user *uservaddr, int addrlen) { int ret = -EBADF; struct fd f; f = fdget(fd); if (f.file) { |
f499a021e
|
1757 1758 1759 1760 1761 |
struct sockaddr_storage address; ret = move_addr_to_kernel(uservaddr, addrlen, &address); if (!ret) ret = __sys_connect_file(f.file, &address, addrlen, 0); |
bd3ded314
|
1762 1763 1764 1765 1766 1767 |
if (f.flags) fput(f.file); } return ret; } |
1387c2c2f
|
1768 1769 1770 1771 1772 |
SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, int, addrlen) { return __sys_connect(fd, uservaddr, addrlen); } |
1da177e4c
|
1773 1774 1775 1776 |
/* * Get the local address ('name') of a socket object. Move the obtained * name to user space. */ |
8882a107b
|
1777 1778 |
int __sys_getsockname(int fd, struct sockaddr __user *usockaddr, int __user *usockaddr_len) |
1da177e4c
|
1779 1780 |
{ struct socket *sock; |
230b18392
|
1781 |
struct sockaddr_storage address; |
9b2c45d47
|
1782 |
int err, fput_needed; |
89bddce58
|
1783 |
|
6cb153cab
|
1784 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4c
|
1785 1786 1787 1788 1789 1790 |
if (!sock) goto out; err = security_socket_getsockname(sock); if (err) goto out_put; |
9b2c45d47
|
1791 1792 |
err = sock->ops->getname(sock, (struct sockaddr *)&address, 0); if (err < 0) |
1da177e4c
|
1793 |
goto out_put; |
9b2c45d47
|
1794 1795 |
/* "err" is actually length in this case */ err = move_addr_to_user(&address, err, usockaddr, usockaddr_len); |
1da177e4c
|
1796 1797 |
out_put: |
6cb153cab
|
1798 |
fput_light(sock->file, fput_needed); |
1da177e4c
|
1799 1800 1801 |
out: return err; } |
8882a107b
|
1802 1803 1804 1805 1806 |
SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, int __user *, usockaddr_len) { return __sys_getsockname(fd, usockaddr, usockaddr_len); } |
1da177e4c
|
1807 1808 1809 1810 |
/* * Get the remote address ('name') of a socket object. Move the obtained * name to user space. */ |
b21c8f838
|
1811 1812 |
int __sys_getpeername(int fd, struct sockaddr __user *usockaddr, int __user *usockaddr_len) |
1da177e4c
|
1813 1814 |
{ struct socket *sock; |
230b18392
|
1815 |
struct sockaddr_storage address; |
9b2c45d47
|
1816 |
int err, fput_needed; |
1da177e4c
|
1817 |
|
89bddce58
|
1818 1819 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); if (sock != NULL) { |
1da177e4c
|
1820 1821 |
err = security_socket_getpeername(sock); if (err) { |
6cb153cab
|
1822 |
fput_light(sock->file, fput_needed); |
1da177e4c
|
1823 1824 |
return err; } |
9b2c45d47
|
1825 1826 1827 1828 |
err = sock->ops->getname(sock, (struct sockaddr *)&address, 1); if (err >= 0) /* "err" is actually length in this case */ err = move_addr_to_user(&address, err, usockaddr, |
89bddce58
|
1829 |
usockaddr_len); |
6cb153cab
|
1830 |
fput_light(sock->file, fput_needed); |
1da177e4c
|
1831 1832 1833 |
} return err; } |
b21c8f838
|
1834 1835 1836 1837 1838 |
SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, int __user *, usockaddr_len) { return __sys_getpeername(fd, usockaddr, usockaddr_len); } |
1da177e4c
|
1839 1840 1841 1842 1843 |
/* * 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. */ |
211b634b7
|
1844 1845 |
int __sys_sendto(int fd, void __user *buff, size_t len, unsigned int flags, struct sockaddr __user *addr, int addr_len) |
1da177e4c
|
1846 1847 |
{ struct socket *sock; |
230b18392
|
1848 |
struct sockaddr_storage address; |
1da177e4c
|
1849 1850 1851 |
int err; struct msghdr msg; struct iovec iov; |
6cb153cab
|
1852 |
int fput_needed; |
6cb153cab
|
1853 |
|
602bd0e90
|
1854 1855 1856 |
err = import_single_range(WRITE, buff, len, &iov, &msg.msg_iter); if (unlikely(err)) return err; |
de0fa95c1
|
1857 1858 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); if (!sock) |
4387ff75f
|
1859 |
goto out; |
6cb153cab
|
1860 |
|
89bddce58
|
1861 |
msg.msg_name = NULL; |
89bddce58
|
1862 1863 1864 |
msg.msg_control = NULL; msg.msg_controllen = 0; msg.msg_namelen = 0; |
6cb153cab
|
1865 |
if (addr) { |
43db362d3
|
1866 |
err = move_addr_to_kernel(addr, addr_len, &address); |
1da177e4c
|
1867 1868 |
if (err < 0) goto out_put; |
230b18392
|
1869 |
msg.msg_name = (struct sockaddr *)&address; |
89bddce58
|
1870 |
msg.msg_namelen = addr_len; |
1da177e4c
|
1871 1872 1873 1874 |
} if (sock->file->f_flags & O_NONBLOCK) flags |= MSG_DONTWAIT; msg.msg_flags = flags; |
d8725c86a
|
1875 |
err = sock_sendmsg(sock, &msg); |
1da177e4c
|
1876 |
|
89bddce58
|
1877 |
out_put: |
de0fa95c1
|
1878 |
fput_light(sock->file, fput_needed); |
4387ff75f
|
1879 |
out: |
1da177e4c
|
1880 1881 |
return err; } |
211b634b7
|
1882 1883 1884 1885 1886 1887 |
SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, unsigned int, flags, struct sockaddr __user *, addr, int, addr_len) { return __sys_sendto(fd, buff, len, flags, addr, addr_len); } |
1da177e4c
|
1888 |
/* |
89bddce58
|
1889 |
* Send a datagram down a socket. |
1da177e4c
|
1890 |
*/ |
3e0fa65f8
|
1891 |
SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
95c961747
|
1892 |
unsigned int, flags) |
1da177e4c
|
1893 |
{ |
211b634b7
|
1894 |
return __sys_sendto(fd, buff, len, flags, NULL, 0); |
1da177e4c
|
1895 1896 1897 |
} /* |
89bddce58
|
1898 |
* Receive a frame from the socket and optionally record the address of the |
1da177e4c
|
1899 1900 1901 |
* sender. We verify the buffers are writable and if needed move the * sender address from kernel to user space. */ |
7a09e1eb9
|
1902 1903 |
int __sys_recvfrom(int fd, void __user *ubuf, size_t size, unsigned int flags, struct sockaddr __user *addr, int __user *addr_len) |
1da177e4c
|
1904 1905 1906 1907 |
{ struct socket *sock; struct iovec iov; struct msghdr msg; |
230b18392
|
1908 |
struct sockaddr_storage address; |
89bddce58
|
1909 |
int err, err2; |
6cb153cab
|
1910 |
int fput_needed; |
602bd0e90
|
1911 1912 1913 |
err = import_single_range(READ, ubuf, size, &iov, &msg.msg_iter); if (unlikely(err)) return err; |
de0fa95c1
|
1914 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4c
|
1915 |
if (!sock) |
de0fa95c1
|
1916 |
goto out; |
1da177e4c
|
1917 |
|
89bddce58
|
1918 1919 |
msg.msg_control = NULL; msg.msg_controllen = 0; |
f3d334260
|
1920 1921 1922 1923 |
/* 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
|
1924 |
msg.msg_iocb = NULL; |
9f138fa60
|
1925 |
msg.msg_flags = 0; |
1da177e4c
|
1926 1927 |
if (sock->file->f_flags & O_NONBLOCK) flags |= MSG_DONTWAIT; |
2da62906b
|
1928 |
err = sock_recvmsg(sock, &msg, flags); |
1da177e4c
|
1929 |
|
89bddce58
|
1930 |
if (err >= 0 && addr != NULL) { |
43db362d3
|
1931 |
err2 = move_addr_to_user(&address, |
230b18392
|
1932 |
msg.msg_namelen, addr, addr_len); |
89bddce58
|
1933 1934 |
if (err2 < 0) err = err2; |
1da177e4c
|
1935 |
} |
de0fa95c1
|
1936 1937 |
fput_light(sock->file, fput_needed); |
4387ff75f
|
1938 |
out: |
1da177e4c
|
1939 1940 |
return err; } |
7a09e1eb9
|
1941 1942 1943 1944 1945 1946 |
SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, unsigned int, flags, struct sockaddr __user *, addr, int __user *, addr_len) { return __sys_recvfrom(fd, ubuf, size, flags, addr, addr_len); } |
1da177e4c
|
1947 |
/* |
89bddce58
|
1948 |
* Receive a datagram from a socket. |
1da177e4c
|
1949 |
*/ |
b7c0ddf5f
|
1950 1951 |
SYSCALL_DEFINE4(recv, int, fd, void __user *, ubuf, size_t, size, unsigned int, flags) |
1da177e4c
|
1952 |
{ |
7a09e1eb9
|
1953 |
return __sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); |
1da177e4c
|
1954 1955 1956 1957 1958 1959 |
} /* * 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. */ |
cc36dca0d
|
1960 1961 |
static int __sys_setsockopt(int fd, int level, int optname, char __user *optval, int optlen) |
1da177e4c
|
1962 |
{ |
0d01da6af
|
1963 1964 |
mm_segment_t oldfs = get_fs(); char *kernel_optval = NULL; |
6cb153cab
|
1965 |
int err, fput_needed; |
1da177e4c
|
1966 1967 1968 1969 |
struct socket *sock; if (optlen < 0) return -EINVAL; |
89bddce58
|
1970 1971 1972 1973 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); if (sock != NULL) { err = security_socket_setsockopt(sock, level, optname); |
6cb153cab
|
1974 1975 |
if (err) goto out_put; |
1da177e4c
|
1976 |
|
0d01da6af
|
1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 |
err = BPF_CGROUP_RUN_PROG_SETSOCKOPT(sock->sk, &level, &optname, optval, &optlen, &kernel_optval); if (err < 0) { goto out_put; } else if (err > 0) { err = 0; goto out_put; } if (kernel_optval) { set_fs(KERNEL_DS); optval = (char __user __force *)kernel_optval; } |
1da177e4c
|
1992 |
if (level == SOL_SOCKET) |
89bddce58
|
1993 1994 1995 |
err = sock_setsockopt(sock, level, optname, optval, optlen); |
1da177e4c
|
1996 |
else |
89bddce58
|
1997 1998 1999 |
err = sock->ops->setsockopt(sock, level, optname, optval, optlen); |
0d01da6af
|
2000 2001 2002 2003 2004 |
if (kernel_optval) { set_fs(oldfs); kfree(kernel_optval); } |
6cb153cab
|
2005 2006 |
out_put: fput_light(sock->file, fput_needed); |
1da177e4c
|
2007 2008 2009 |
} return err; } |
cc36dca0d
|
2010 2011 2012 2013 2014 |
SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, char __user *, optval, int, optlen) { return __sys_setsockopt(fd, level, optname, optval, optlen); } |
1da177e4c
|
2015 2016 2017 2018 |
/* * 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. */ |
13a2d70e2
|
2019 2020 |
static int __sys_getsockopt(int fd, int level, int optname, char __user *optval, int __user *optlen) |
1da177e4c
|
2021 |
{ |
6cb153cab
|
2022 |
int err, fput_needed; |
1da177e4c
|
2023 |
struct socket *sock; |
0d01da6af
|
2024 |
int max_optlen; |
1da177e4c
|
2025 |
|
89bddce58
|
2026 2027 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); if (sock != NULL) { |
6cb153cab
|
2028 2029 2030 |
err = security_socket_getsockopt(sock, level, optname); if (err) goto out_put; |
1da177e4c
|
2031 |
|
0d01da6af
|
2032 |
max_optlen = BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen); |
1da177e4c
|
2033 |
if (level == SOL_SOCKET) |
89bddce58
|
2034 2035 2036 |
err = sock_getsockopt(sock, level, optname, optval, optlen); |
1da177e4c
|
2037 |
else |
89bddce58
|
2038 2039 2040 |
err = sock->ops->getsockopt(sock, level, optname, optval, optlen); |
0d01da6af
|
2041 2042 2043 2044 |
err = BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock->sk, level, optname, optval, optlen, max_optlen, err); |
6cb153cab
|
2045 2046 |
out_put: fput_light(sock->file, fput_needed); |
1da177e4c
|
2047 2048 2049 |
} return err; } |
13a2d70e2
|
2050 2051 2052 2053 2054 |
SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, char __user *, optval, int __user *, optlen) { return __sys_getsockopt(fd, level, optname, optval, optlen); } |
1da177e4c
|
2055 2056 2057 |
/* * Shutdown a socket. */ |
005a1aeac
|
2058 |
int __sys_shutdown(int fd, int how) |
1da177e4c
|
2059 |
{ |
6cb153cab
|
2060 |
int err, fput_needed; |
1da177e4c
|
2061 |
struct socket *sock; |
89bddce58
|
2062 2063 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); if (sock != NULL) { |
1da177e4c
|
2064 |
err = security_socket_shutdown(sock, how); |
6cb153cab
|
2065 2066 2067 |
if (!err) err = sock->ops->shutdown(sock, how); fput_light(sock->file, fput_needed); |
1da177e4c
|
2068 2069 2070 |
} return err; } |
005a1aeac
|
2071 2072 2073 2074 |
SYSCALL_DEFINE2(shutdown, int, fd, int, how) { return __sys_shutdown(fd, how); } |
89bddce58
|
2075 |
/* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4c
|
2076 2077 2078 2079 2080 |
* 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
|
2081 2082 2083 2084 |
struct used_address { struct sockaddr_storage name; unsigned int name_len; }; |
da1842849
|
2085 2086 2087 2088 |
static int copy_msghdr_from_user(struct msghdr *kmsg, struct user_msghdr __user *umsg, struct sockaddr __user **save_addr, struct iovec **iov) |
1661bf364
|
2089 |
{ |
ffb07550c
|
2090 |
struct user_msghdr msg; |
08adb7dab
|
2091 |
ssize_t err; |
ffb07550c
|
2092 |
if (copy_from_user(&msg, umsg, sizeof(*umsg))) |
1661bf364
|
2093 |
return -EFAULT; |
dbb490b96
|
2094 |
|
864d96642
|
2095 |
kmsg->msg_control = (void __force *)msg.msg_control; |
ffb07550c
|
2096 2097 2098 2099 2100 |
kmsg->msg_controllen = msg.msg_controllen; kmsg->msg_flags = msg.msg_flags; kmsg->msg_namelen = msg.msg_namelen; if (!msg.msg_name) |
6a2a2b3ae
|
2101 |
kmsg->msg_namelen = 0; |
dbb490b96
|
2102 2103 |
if (kmsg->msg_namelen < 0) return -EINVAL; |
1661bf364
|
2104 |
if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
db31c55a6
|
2105 |
kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
08adb7dab
|
2106 2107 |
if (save_addr) |
ffb07550c
|
2108 |
*save_addr = msg.msg_name; |
08adb7dab
|
2109 |
|
ffb07550c
|
2110 |
if (msg.msg_name && kmsg->msg_namelen) { |
08adb7dab
|
2111 |
if (!save_addr) { |
864d96642
|
2112 2113 |
err = move_addr_to_kernel(msg.msg_name, kmsg->msg_namelen, |
08adb7dab
|
2114 2115 2116 2117 2118 2119 2120 2121 |
kmsg->msg_name); if (err < 0) return err; } } else { kmsg->msg_name = NULL; kmsg->msg_namelen = 0; } |
ffb07550c
|
2122 |
if (msg.msg_iovlen > UIO_MAXIOV) |
08adb7dab
|
2123 |
return -EMSGSIZE; |
0345f9313
|
2124 |
kmsg->msg_iocb = NULL; |
87e5e6dab
|
2125 |
err = import_iovec(save_addr ? READ : WRITE, |
ffb07550c
|
2126 |
msg.msg_iov, msg.msg_iovlen, |
da1842849
|
2127 |
UIO_FASTIOV, iov, &kmsg->msg_iter); |
87e5e6dab
|
2128 |
return err < 0 ? err : 0; |
1661bf364
|
2129 |
} |
4257c8ca1
|
2130 2131 2132 |
static int ____sys_sendmsg(struct socket *sock, struct msghdr *msg_sys, unsigned int flags, struct used_address *used_address, unsigned int allowed_msghdr_flags) |
1da177e4c
|
2133 |
{ |
b9d717a7b
|
2134 |
unsigned char ctl[sizeof(struct cmsghdr) + 20] |
846cc1231
|
2135 |
__aligned(sizeof(__kernel_size_t)); |
89bddce58
|
2136 |
/* 20 is size of ipv6_pktinfo */ |
1da177e4c
|
2137 |
unsigned char *ctl_buf = ctl; |
d8725c86a
|
2138 |
int ctl_len; |
08adb7dab
|
2139 |
ssize_t err; |
89bddce58
|
2140 |
|
1da177e4c
|
2141 |
err = -ENOBUFS; |
228e548e6
|
2142 |
if (msg_sys->msg_controllen > INT_MAX) |
4257c8ca1
|
2143 |
goto out; |
28a94d8fb
|
2144 |
flags |= (msg_sys->msg_flags & allowed_msghdr_flags); |
228e548e6
|
2145 |
ctl_len = msg_sys->msg_controllen; |
1da177e4c
|
2146 |
if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce58
|
2147 |
err = |
228e548e6
|
2148 |
cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
89bddce58
|
2149 |
sizeof(ctl)); |
1da177e4c
|
2150 |
if (err) |
4257c8ca1
|
2151 |
goto out; |
228e548e6
|
2152 2153 |
ctl_buf = msg_sys->msg_control; ctl_len = msg_sys->msg_controllen; |
1da177e4c
|
2154 |
} else if (ctl_len) { |
ac4340fc3
|
2155 2156 |
BUILD_BUG_ON(sizeof(struct cmsghdr) != CMSG_ALIGN(sizeof(struct cmsghdr))); |
89bddce58
|
2157 |
if (ctl_len > sizeof(ctl)) { |
1da177e4c
|
2158 |
ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce58
|
2159 |
if (ctl_buf == NULL) |
4257c8ca1
|
2160 |
goto out; |
1da177e4c
|
2161 2162 2163 |
} err = -EFAULT; /* |
228e548e6
|
2164 |
* Careful! Before this, msg_sys->msg_control contains a user pointer. |
1da177e4c
|
2165 2166 2167 |
* Afterwards, it will be a kernel pointer. Thus the compiler-assisted * checking falls down on this. */ |
fb8621bb6
|
2168 |
if (copy_from_user(ctl_buf, |
228e548e6
|
2169 |
(void __user __force *)msg_sys->msg_control, |
89bddce58
|
2170 |
ctl_len)) |
1da177e4c
|
2171 |
goto out_freectl; |
228e548e6
|
2172 |
msg_sys->msg_control = ctl_buf; |
1da177e4c
|
2173 |
} |
228e548e6
|
2174 |
msg_sys->msg_flags = flags; |
1da177e4c
|
2175 2176 |
if (sock->file->f_flags & O_NONBLOCK) |
228e548e6
|
2177 |
msg_sys->msg_flags |= MSG_DONTWAIT; |
c71d8ebe7
|
2178 2179 2180 2181 2182 2183 |
/* * 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
|
2184 2185 2186 |
if (used_address && msg_sys->msg_name && used_address->name_len == msg_sys->msg_namelen && !memcmp(&used_address->name, msg_sys->msg_name, |
c71d8ebe7
|
2187 |
used_address->name_len)) { |
d8725c86a
|
2188 |
err = sock_sendmsg_nosec(sock, msg_sys); |
c71d8ebe7
|
2189 2190 |
goto out_freectl; } |
d8725c86a
|
2191 |
err = sock_sendmsg(sock, msg_sys); |
c71d8ebe7
|
2192 2193 2194 2195 2196 2197 |
/* * 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
|
2198 2199 2200 |
if (msg_sys->msg_name) memcpy(&used_address->name, msg_sys->msg_name, used_address->name_len); |
c71d8ebe7
|
2201 |
} |
1da177e4c
|
2202 2203 |
out_freectl: |
89bddce58
|
2204 |
if (ctl_buf != ctl) |
1da177e4c
|
2205 |
sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
4257c8ca1
|
2206 2207 2208 |
out: return err; } |
03b1230ca
|
2209 2210 2211 |
int sendmsg_copy_msghdr(struct msghdr *msg, struct user_msghdr __user *umsg, unsigned flags, struct iovec **iov) |
4257c8ca1
|
2212 2213 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 |
{ int err; if (flags & MSG_CMSG_COMPAT) { struct compat_msghdr __user *msg_compat; msg_compat = (struct compat_msghdr __user *) umsg; err = get_compat_msghdr(msg, msg_compat, NULL, iov); } else { err = copy_msghdr_from_user(msg, umsg, NULL, iov); } if (err < 0) return err; return 0; } static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg, struct msghdr *msg_sys, unsigned int flags, struct used_address *used_address, unsigned int allowed_msghdr_flags) { struct sockaddr_storage address; struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; ssize_t err; msg_sys->msg_name = &address; err = sendmsg_copy_msghdr(msg_sys, msg, flags, &iov); if (err < 0) return err; err = ____sys_sendmsg(sock, msg_sys, flags, used_address, allowed_msghdr_flags); |
da1842849
|
2246 |
kfree(iov); |
228e548e6
|
2247 2248 2249 2250 2251 2252 |
return err; } /* * BSD sendmsg interface */ |
03b1230ca
|
2253 |
long __sys_sendmsg_sock(struct socket *sock, struct msghdr *msg, |
0fa03c624
|
2254 2255 |
unsigned int flags) { |
d69e07793
|
2256 |
/* disallow ancillary data requests from this path */ |
03b1230ca
|
2257 2258 |
if (msg->msg_control || msg->msg_controllen) return -EINVAL; |
d69e07793
|
2259 |
|
03b1230ca
|
2260 |
return ____sys_sendmsg(sock, msg, flags, NULL, 0); |
0fa03c624
|
2261 |
} |
228e548e6
|
2262 |
|
e1834a329
|
2263 2264 |
long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned int flags, bool forbid_cmsg_compat) |
228e548e6
|
2265 2266 2267 |
{ int fput_needed, err; struct msghdr msg_sys; |
1be374a05
|
2268 |
struct socket *sock; |
e1834a329
|
2269 2270 |
if (forbid_cmsg_compat && (flags & MSG_CMSG_COMPAT)) return -EINVAL; |
1be374a05
|
2271 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); |
228e548e6
|
2272 2273 |
if (!sock) goto out; |
28a94d8fb
|
2274 |
err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL, 0); |
228e548e6
|
2275 |
|
6cb153cab
|
2276 |
fput_light(sock->file, fput_needed); |
89bddce58
|
2277 |
out: |
1da177e4c
|
2278 2279 |
return err; } |
666547ff5
|
2280 |
SYSCALL_DEFINE3(sendmsg, int, fd, struct user_msghdr __user *, msg, unsigned int, flags) |
a7526eb5d
|
2281 |
{ |
e1834a329
|
2282 |
return __sys_sendmsg(fd, msg, flags, true); |
a7526eb5d
|
2283 |
} |
228e548e6
|
2284 2285 2286 2287 2288 |
/* * Linux sendmmsg interface */ int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, |
e1834a329
|
2289 |
unsigned int flags, bool forbid_cmsg_compat) |
228e548e6
|
2290 2291 2292 2293 2294 2295 |
{ int fput_needed, err, datagrams; struct socket *sock; struct mmsghdr __user *entry; struct compat_mmsghdr __user *compat_entry; struct msghdr msg_sys; |
c71d8ebe7
|
2296 |
struct used_address used_address; |
f092276d8
|
2297 |
unsigned int oflags = flags; |
228e548e6
|
2298 |
|
e1834a329
|
2299 2300 |
if (forbid_cmsg_compat && (flags & MSG_CMSG_COMPAT)) return -EINVAL; |
98382f419
|
2301 2302 |
if (vlen > UIO_MAXIOV) vlen = UIO_MAXIOV; |
228e548e6
|
2303 2304 2305 2306 2307 2308 |
datagrams = 0; sock = sockfd_lookup_light(fd, &err, &fput_needed); if (!sock) return err; |
c71d8ebe7
|
2309 |
used_address.name_len = UINT_MAX; |
228e548e6
|
2310 2311 |
entry = mmsg; compat_entry = (struct compat_mmsghdr __user *)mmsg; |
728ffb86f
|
2312 |
err = 0; |
f092276d8
|
2313 |
flags |= MSG_BATCH; |
228e548e6
|
2314 2315 |
while (datagrams < vlen) { |
f092276d8
|
2316 2317 |
if (datagrams == vlen - 1) flags = oflags; |
228e548e6
|
2318 |
if (MSG_CMSG_COMPAT & flags) { |
666547ff5
|
2319 |
err = ___sys_sendmsg(sock, (struct user_msghdr __user *)compat_entry, |
28a94d8fb
|
2320 |
&msg_sys, flags, &used_address, MSG_EOR); |
228e548e6
|
2321 2322 2323 2324 2325 |
if (err < 0) break; err = __put_user(err, &compat_entry->msg_len); ++compat_entry; } else { |
a7526eb5d
|
2326 |
err = ___sys_sendmsg(sock, |
666547ff5
|
2327 |
(struct user_msghdr __user *)entry, |
28a94d8fb
|
2328 |
&msg_sys, flags, &used_address, MSG_EOR); |
228e548e6
|
2329 2330 2331 2332 2333 2334 2335 2336 2337 |
if (err < 0) break; err = put_user(err, &entry->msg_len); ++entry; } if (err) break; ++datagrams; |
3023898b7
|
2338 2339 |
if (msg_data_left(&msg_sys)) break; |
a78cb84c6
|
2340 |
cond_resched(); |
228e548e6
|
2341 |
} |
228e548e6
|
2342 |
fput_light(sock->file, fput_needed); |
728ffb86f
|
2343 2344 |
/* We only return an error if no datagrams were able to be sent */ if (datagrams != 0) |
228e548e6
|
2345 |
return datagrams; |
228e548e6
|
2346 2347 2348 2349 2350 2351 |
return err; } SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, unsigned int, vlen, unsigned int, flags) { |
e1834a329
|
2352 |
return __sys_sendmmsg(fd, mmsg, vlen, flags, true); |
228e548e6
|
2353 |
} |
03b1230ca
|
2354 2355 2356 2357 |
int recvmsg_copy_msghdr(struct msghdr *msg, struct user_msghdr __user *umsg, unsigned flags, struct sockaddr __user **uaddr, struct iovec **iov) |
1da177e4c
|
2358 |
{ |
08adb7dab
|
2359 |
ssize_t err; |
1da177e4c
|
2360 |
|
4257c8ca1
|
2361 2362 |
if (MSG_CMSG_COMPAT & flags) { struct compat_msghdr __user *msg_compat; |
1da177e4c
|
2363 |
|
4257c8ca1
|
2364 2365 2366 2367 2368 |
msg_compat = (struct compat_msghdr __user *) umsg; err = get_compat_msghdr(msg, msg_compat, uaddr, iov); } else { err = copy_msghdr_from_user(msg, umsg, uaddr, iov); } |
1da177e4c
|
2369 |
if (err < 0) |
da1842849
|
2370 |
return err; |
1da177e4c
|
2371 |
|
4257c8ca1
|
2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 |
return 0; } static int ____sys_recvmsg(struct socket *sock, struct msghdr *msg_sys, struct user_msghdr __user *msg, struct sockaddr __user *uaddr, unsigned int flags, int nosec) { struct compat_msghdr __user *msg_compat = (struct compat_msghdr __user *) msg; int __user *uaddr_len = COMPAT_NAMELEN(msg); struct sockaddr_storage addr; unsigned long cmsg_ptr; int len; ssize_t err; msg_sys->msg_name = &addr; |
a2e272554
|
2389 2390 |
cmsg_ptr = (unsigned long)msg_sys->msg_control; msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); |
89bddce58
|
2391 |
|
f3d334260
|
2392 2393 |
/* We assume all kernel code knows the size of sockaddr_storage */ msg_sys->msg_namelen = 0; |
1da177e4c
|
2394 2395 |
if (sock->file->f_flags & O_NONBLOCK) flags |= MSG_DONTWAIT; |
1af66221a
|
2396 2397 2398 2399 2400 |
if (unlikely(nosec)) err = sock_recvmsg_nosec(sock, msg_sys, flags); else err = sock_recvmsg(sock, msg_sys, flags); |
1da177e4c
|
2401 |
if (err < 0) |
4257c8ca1
|
2402 |
goto out; |
1da177e4c
|
2403 2404 2405 |
len = err; if (uaddr != NULL) { |
43db362d3
|
2406 |
err = move_addr_to_user(&addr, |
a2e272554
|
2407 |
msg_sys->msg_namelen, uaddr, |
89bddce58
|
2408 |
uaddr_len); |
1da177e4c
|
2409 |
if (err < 0) |
4257c8ca1
|
2410 |
goto out; |
1da177e4c
|
2411 |
} |
a2e272554
|
2412 |
err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421c
|
2413 |
COMPAT_FLAGS(msg)); |
1da177e4c
|
2414 |
if (err) |
4257c8ca1
|
2415 |
goto out; |
1da177e4c
|
2416 |
if (MSG_CMSG_COMPAT & flags) |
a2e272554
|
2417 |
err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4c
|
2418 2419 |
&msg_compat->msg_controllen); else |
a2e272554
|
2420 |
err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4c
|
2421 2422 |
&msg->msg_controllen); if (err) |
4257c8ca1
|
2423 |
goto out; |
1da177e4c
|
2424 |
err = len; |
4257c8ca1
|
2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 |
out: return err; } static int ___sys_recvmsg(struct socket *sock, struct user_msghdr __user *msg, struct msghdr *msg_sys, unsigned int flags, int nosec) { struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; /* user mode address pointers */ struct sockaddr __user *uaddr; ssize_t err; err = recvmsg_copy_msghdr(msg_sys, msg, flags, &uaddr, &iov); if (err < 0) return err; |
1da177e4c
|
2440 |
|
4257c8ca1
|
2441 |
err = ____sys_recvmsg(sock, msg_sys, msg, uaddr, flags, nosec); |
da1842849
|
2442 |
kfree(iov); |
a2e272554
|
2443 2444 2445 2446 2447 2448 |
return err; } /* * BSD recvmsg interface */ |
03b1230ca
|
2449 2450 2451 |
long __sys_recvmsg_sock(struct socket *sock, struct msghdr *msg, struct user_msghdr __user *umsg, struct sockaddr __user *uaddr, unsigned int flags) |
aa1fa28fc
|
2452 |
{ |
d69e07793
|
2453 |
/* disallow ancillary data requests from this path */ |
03b1230ca
|
2454 2455 |
if (msg->msg_control || msg->msg_controllen) return -EINVAL; |
aa1fa28fc
|
2456 |
|
03b1230ca
|
2457 |
return ____sys_recvmsg(sock, msg, umsg, uaddr, flags, 0); |
aa1fa28fc
|
2458 |
} |
e1834a329
|
2459 2460 |
long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned int flags, bool forbid_cmsg_compat) |
a2e272554
|
2461 2462 2463 |
{ int fput_needed, err; struct msghdr msg_sys; |
1be374a05
|
2464 |
struct socket *sock; |
e1834a329
|
2465 2466 |
if (forbid_cmsg_compat && (flags & MSG_CMSG_COMPAT)) return -EINVAL; |
1be374a05
|
2467 |
sock = sockfd_lookup_light(fd, &err, &fput_needed); |
a2e272554
|
2468 2469 |
if (!sock) goto out; |
a7526eb5d
|
2470 |
err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
a2e272554
|
2471 |
|
6cb153cab
|
2472 |
fput_light(sock->file, fput_needed); |
1da177e4c
|
2473 2474 2475 |
out: return err; } |
666547ff5
|
2476 |
SYSCALL_DEFINE3(recvmsg, int, fd, struct user_msghdr __user *, msg, |
a7526eb5d
|
2477 2478 |
unsigned int, flags) { |
e1834a329
|
2479 |
return __sys_recvmsg(fd, msg, flags, true); |
a7526eb5d
|
2480 |
} |
a2e272554
|
2481 2482 2483 |
/* * Linux recvmmsg interface */ |
e11d4284e
|
2484 2485 2486 |
static int do_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, unsigned int flags, struct timespec64 *timeout) |
a2e272554
|
2487 2488 2489 2490 |
{ int fput_needed, err, datagrams; struct socket *sock; struct mmsghdr __user *entry; |
d7256d0eb
|
2491 |
struct compat_mmsghdr __user *compat_entry; |
a2e272554
|
2492 |
struct msghdr msg_sys; |
766b9f928
|
2493 2494 |
struct timespec64 end_time; struct timespec64 timeout64; |
a2e272554
|
2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 |
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; |
7797dc414
|
2506 2507 2508 2509 2510 2511 |
if (likely(!(flags & MSG_ERRQUEUE))) { err = sock_error(sock->sk); if (err) { datagrams = err; goto out_put; } |
e623a9e9d
|
2512 |
} |
a2e272554
|
2513 2514 |
entry = mmsg; |
d7256d0eb
|
2515 |
compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e272554
|
2516 2517 2518 2519 2520 |
while (datagrams < vlen) { /* * No need to ask LSM for more than the first datagram. */ |
d7256d0eb
|
2521 |
if (MSG_CMSG_COMPAT & flags) { |
666547ff5
|
2522 |
err = ___sys_recvmsg(sock, (struct user_msghdr __user *)compat_entry, |
a7526eb5d
|
2523 2524 |
&msg_sys, flags & ~MSG_WAITFORONE, datagrams); |
d7256d0eb
|
2525 2526 2527 2528 2529 |
if (err < 0) break; err = __put_user(err, &compat_entry->msg_len); ++compat_entry; } else { |
a7526eb5d
|
2530 |
err = ___sys_recvmsg(sock, |
666547ff5
|
2531 |
(struct user_msghdr __user *)entry, |
a7526eb5d
|
2532 2533 |
&msg_sys, flags & ~MSG_WAITFORONE, datagrams); |
d7256d0eb
|
2534 2535 2536 2537 2538 |
if (err < 0) break; err = put_user(err, &entry->msg_len); ++entry; } |
a2e272554
|
2539 2540 |
if (err) break; |
a2e272554
|
2541 |
++datagrams; |
71c5c1595
|
2542 2543 2544 |
/* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ if (flags & MSG_WAITFORONE) flags |= MSG_DONTWAIT; |
a2e272554
|
2545 |
if (timeout) { |
766b9f928
|
2546 |
ktime_get_ts64(&timeout64); |
c2e6c8567
|
2547 |
*timeout = timespec64_sub(end_time, timeout64); |
a2e272554
|
2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 |
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
|
2561 |
cond_resched(); |
a2e272554
|
2562 |
} |
a2e272554
|
2563 |
if (err == 0) |
34b88a68f
|
2564 2565 2566 2567 2568 2569 |
goto out_put; if (datagrams == 0) { datagrams = err; goto out_put; } |
a2e272554
|
2570 |
|
34b88a68f
|
2571 2572 2573 2574 2575 |
/* * We may return less entries than requested (vlen) if the * sock is non block and there aren't enough datagrams... */ if (err != -EAGAIN) { |
a2e272554
|
2576 |
/* |
34b88a68f
|
2577 2578 2579 2580 |
* ... 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
|
2581 |
*/ |
34b88a68f
|
2582 |
sock->sk->sk_err = -err; |
a2e272554
|
2583 |
} |
34b88a68f
|
2584 2585 |
out_put: fput_light(sock->file, fput_needed); |
a2e272554
|
2586 |
|
34b88a68f
|
2587 |
return datagrams; |
a2e272554
|
2588 |
} |
e11d4284e
|
2589 2590 2591 2592 |
int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, unsigned int flags, struct __kernel_timespec __user *timeout, struct old_timespec32 __user *timeout32) |
a2e272554
|
2593 2594 |
{ int datagrams; |
c2e6c8567
|
2595 |
struct timespec64 timeout_sys; |
a2e272554
|
2596 |
|
e11d4284e
|
2597 2598 |
if (timeout && get_timespec64(&timeout_sys, timeout)) return -EFAULT; |
a2e272554
|
2599 |
|
e11d4284e
|
2600 |
if (timeout32 && get_old_timespec32(&timeout_sys, timeout32)) |
a2e272554
|
2601 |
return -EFAULT; |
e11d4284e
|
2602 2603 2604 2605 |
if (!timeout && !timeout32) return do_recvmmsg(fd, mmsg, vlen, flags, NULL); datagrams = do_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); |
a2e272554
|
2606 |
|
e11d4284e
|
2607 2608 2609 2610 2611 2612 2613 |
if (datagrams <= 0) return datagrams; if (timeout && put_timespec64(&timeout_sys, timeout)) datagrams = -EFAULT; if (timeout32 && put_old_timespec32(&timeout_sys, timeout32)) |
a2e272554
|
2614 2615 2616 2617 |
datagrams = -EFAULT; return datagrams; } |
1255e2690
|
2618 2619 |
SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, unsigned int, vlen, unsigned int, flags, |
c2e6c8567
|
2620 |
struct __kernel_timespec __user *, timeout) |
1255e2690
|
2621 |
{ |
e11d4284e
|
2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 |
if (flags & MSG_CMSG_COMPAT) return -EINVAL; return __sys_recvmmsg(fd, mmsg, vlen, flags, timeout, NULL); } #ifdef CONFIG_COMPAT_32BIT_TIME SYSCALL_DEFINE5(recvmmsg_time32, int, fd, struct mmsghdr __user *, mmsg, unsigned int, vlen, unsigned int, flags, struct old_timespec32 __user *, timeout) { if (flags & MSG_CMSG_COMPAT) return -EINVAL; return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL, timeout); |
1255e2690
|
2637 |
} |
e11d4284e
|
2638 |
#endif |
1255e2690
|
2639 |
|
a2e272554
|
2640 |
#ifdef __ARCH_WANT_SYS_SOCKETCALL |
1da177e4c
|
2641 2642 |
/* Argument list sizes for sys_socketcall */ #define AL(x) ((x) * sizeof(unsigned long)) |
228e548e6
|
2643 |
static const unsigned char nargs[21] = { |
c6d409cfd
|
2644 2645 2646 |
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
|
2647 |
AL(4), AL(5), AL(4) |
89bddce58
|
2648 |
}; |
1da177e4c
|
2649 2650 2651 |
#undef AL /* |
89bddce58
|
2652 |
* System call vectors. |
1da177e4c
|
2653 2654 2655 |
* * Argument checking cleaned up. Saved 20% in size. * This function doesn't need to set the kernel lock because |
89bddce58
|
2656 |
* it is set by the callees. |
1da177e4c
|
2657 |
*/ |
3e0fa65f8
|
2658 |
SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4c
|
2659 |
{ |
2950fa9d3
|
2660 |
unsigned long a[AUDITSC_ARGS]; |
89bddce58
|
2661 |
unsigned long a0, a1; |
1da177e4c
|
2662 |
int err; |
47379052b
|
2663 |
unsigned int len; |
1da177e4c
|
2664 |
|
228e548e6
|
2665 |
if (call < 1 || call > SYS_SENDMMSG) |
1da177e4c
|
2666 |
return -EINVAL; |
c8e8cd579
|
2667 |
call = array_index_nospec(call, SYS_SENDMMSG + 1); |
1da177e4c
|
2668 |
|
47379052b
|
2669 2670 2671 |
len = nargs[call]; if (len > sizeof(a)) return -EINVAL; |
1da177e4c
|
2672 |
/* copy_from_user should be SMP safe. */ |
47379052b
|
2673 |
if (copy_from_user(a, args, len)) |
1da177e4c
|
2674 |
return -EFAULT; |
3ec3b2fba
|
2675 |
|
2950fa9d3
|
2676 2677 2678 |
err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); if (err) return err; |
3ec3b2fba
|
2679 |
|
89bddce58
|
2680 2681 2682 2683 2684 |
a0 = a[0]; a1 = a[1]; switch (call) { case SYS_SOCKET: |
9d6a15c3f
|
2685 |
err = __sys_socket(a0, a1, a[2]); |
89bddce58
|
2686 2687 |
break; case SYS_BIND: |
a87d35d87
|
2688 |
err = __sys_bind(a0, (struct sockaddr __user *)a1, a[2]); |
89bddce58
|
2689 2690 |
break; case SYS_CONNECT: |
1387c2c2f
|
2691 |
err = __sys_connect(a0, (struct sockaddr __user *)a1, a[2]); |
89bddce58
|
2692 2693 |
break; case SYS_LISTEN: |
25e290eed
|
2694 |
err = __sys_listen(a0, a1); |
89bddce58
|
2695 2696 |
break; case SYS_ACCEPT: |
4541e8056
|
2697 2698 |
err = __sys_accept4(a0, (struct sockaddr __user *)a1, (int __user *)a[2], 0); |
89bddce58
|
2699 2700 2701 |
break; case SYS_GETSOCKNAME: err = |
8882a107b
|
2702 2703 |
__sys_getsockname(a0, (struct sockaddr __user *)a1, (int __user *)a[2]); |
89bddce58
|
2704 2705 2706 |
break; case SYS_GETPEERNAME: err = |
b21c8f838
|
2707 2708 |
__sys_getpeername(a0, (struct sockaddr __user *)a1, (int __user *)a[2]); |
89bddce58
|
2709 2710 |
break; case SYS_SOCKETPAIR: |
6debc8d83
|
2711 |
err = __sys_socketpair(a0, a1, a[2], (int __user *)a[3]); |
89bddce58
|
2712 2713 |
break; case SYS_SEND: |
f3bf896b1
|
2714 2715 |
err = __sys_sendto(a0, (void __user *)a1, a[2], a[3], NULL, 0); |
89bddce58
|
2716 2717 |
break; case SYS_SENDTO: |
211b634b7
|
2718 2719 |
err = __sys_sendto(a0, (void __user *)a1, a[2], a[3], (struct sockaddr __user *)a[4], a[5]); |
89bddce58
|
2720 2721 |
break; case SYS_RECV: |
d27e9afc6
|
2722 2723 |
err = __sys_recvfrom(a0, (void __user *)a1, a[2], a[3], NULL, NULL); |
89bddce58
|
2724 2725 |
break; case SYS_RECVFROM: |
7a09e1eb9
|
2726 2727 2728 |
err = __sys_recvfrom(a0, (void __user *)a1, a[2], a[3], (struct sockaddr __user *)a[4], (int __user *)a[5]); |
89bddce58
|
2729 2730 |
break; case SYS_SHUTDOWN: |
005a1aeac
|
2731 |
err = __sys_shutdown(a0, a1); |
89bddce58
|
2732 2733 |
break; case SYS_SETSOCKOPT: |
cc36dca0d
|
2734 2735 |
err = __sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); |
89bddce58
|
2736 2737 2738 |
break; case SYS_GETSOCKOPT: err = |
13a2d70e2
|
2739 2740 |
__sys_getsockopt(a0, a1, a[2], (char __user *)a[3], (int __user *)a[4]); |
89bddce58
|
2741 2742 |
break; case SYS_SENDMSG: |
e1834a329
|
2743 2744 |
err = __sys_sendmsg(a0, (struct user_msghdr __user *)a1, a[2], true); |
89bddce58
|
2745 |
break; |
228e548e6
|
2746 |
case SYS_SENDMMSG: |
e1834a329
|
2747 2748 |
err = __sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], true); |
228e548e6
|
2749 |
break; |
89bddce58
|
2750 |
case SYS_RECVMSG: |
e1834a329
|
2751 2752 |
err = __sys_recvmsg(a0, (struct user_msghdr __user *)a1, a[2], true); |
89bddce58
|
2753 |
break; |
a2e272554
|
2754 |
case SYS_RECVMMSG: |
3ca47e958
|
2755 |
if (IS_ENABLED(CONFIG_64BIT)) |
e11d4284e
|
2756 2757 2758 2759 2760 2761 2762 2763 |
err = __sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], (struct __kernel_timespec __user *)a[4], NULL); else err = __sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], NULL, (struct old_timespec32 __user *)a[4]); |
a2e272554
|
2764 |
break; |
de11defeb
|
2765 |
case SYS_ACCEPT4: |
4541e8056
|
2766 2767 |
err = __sys_accept4(a0, (struct sockaddr __user *)a1, (int __user *)a[2], a[3]); |
aaca0bdca
|
2768 |
break; |
89bddce58
|
2769 2770 2771 |
default: err = -EINVAL; break; |
1da177e4c
|
2772 2773 2774 |
} return err; } |
89bddce58
|
2775 |
#endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4c
|
2776 |
|
55737fda0
|
2777 2778 2779 2780 |
/** * sock_register - add a socket protocol handler * @ops: description of protocol * |
1da177e4c
|
2781 2782 |
* This function is called by a protocol handler that wants to * advertise its address family, and have it linked into the |
e793c0f70
|
2783 |
* socket interface. The value ops->family corresponds to the |
55737fda0
|
2784 |
* socket system call protocol family. |
1da177e4c
|
2785 |
*/ |
f0fd27d42
|
2786 |
int sock_register(const struct net_proto_family *ops) |
1da177e4c
|
2787 2788 2789 2790 |
{ int err; if (ops->family >= NPROTO) { |
3410f22ea
|
2791 2792 |
pr_crit("protocol %d >= NPROTO(%d) ", ops->family, NPROTO); |
1da177e4c
|
2793 2794 |
return -ENOBUFS; } |
55737fda0
|
2795 2796 |
spin_lock(&net_family_lock); |
190683a9d
|
2797 2798 |
if (rcu_dereference_protected(net_families[ops->family], lockdep_is_held(&net_family_lock))) |
55737fda0
|
2799 2800 |
err = -EEXIST; else { |
cf778b00e
|
2801 |
rcu_assign_pointer(net_families[ops->family], ops); |
1da177e4c
|
2802 2803 |
err = 0; } |
55737fda0
|
2804 |
spin_unlock(&net_family_lock); |
3410f22ea
|
2805 2806 |
pr_info("NET: Registered protocol family %d ", ops->family); |
1da177e4c
|
2807 2808 |
return err; } |
c6d409cfd
|
2809 |
EXPORT_SYMBOL(sock_register); |
1da177e4c
|
2810 |
|
55737fda0
|
2811 2812 2813 2814 |
/** * sock_unregister - remove a protocol handler * @family: protocol family to remove * |
1da177e4c
|
2815 2816 |
* This function is called by a protocol handler that wants to * remove its address family, and have it unlinked from the |
55737fda0
|
2817 2818 2819 2820 2821 2822 |
* 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
|
2823 |
*/ |
f0fd27d42
|
2824 |
void sock_unregister(int family) |
1da177e4c
|
2825 |
{ |
f0fd27d42
|
2826 |
BUG_ON(family < 0 || family >= NPROTO); |
1da177e4c
|
2827 |
|
55737fda0
|
2828 |
spin_lock(&net_family_lock); |
a9b3cd7f3
|
2829 |
RCU_INIT_POINTER(net_families[family], NULL); |
55737fda0
|
2830 2831 2832 |
spin_unlock(&net_family_lock); synchronize_rcu(); |
3410f22ea
|
2833 2834 |
pr_info("NET: Unregistered protocol family %d ", family); |
1da177e4c
|
2835 |
} |
c6d409cfd
|
2836 |
EXPORT_SYMBOL(sock_unregister); |
1da177e4c
|
2837 |
|
bf2ae2e4b
|
2838 2839 |
bool sock_is_registered(int family) { |
66b51b0a0
|
2840 |
return family < NPROTO && rcu_access_pointer(net_families[family]); |
bf2ae2e4b
|
2841 |
} |
77d76ea31
|
2842 |
static int __init sock_init(void) |
1da177e4c
|
2843 |
{ |
b3e19d924
|
2844 |
int err; |
2ca794e5e
|
2845 2846 2847 2848 2849 2850 |
/* * Initialize the network sysctl infrastructure. */ err = net_sysctl_init(); if (err) goto out; |
b3e19d924
|
2851 |
|
1da177e4c
|
2852 |
/* |
89bddce58
|
2853 |
* Initialize skbuff SLAB cache |
1da177e4c
|
2854 2855 |
*/ skb_init(); |
1da177e4c
|
2856 2857 |
/* |
89bddce58
|
2858 |
* Initialize the protocols module. |
1da177e4c
|
2859 2860 2861 |
*/ init_inodecache(); |
b3e19d924
|
2862 2863 2864 2865 |
err = register_filesystem(&sock_fs_type); if (err) goto out_fs; |
1da177e4c
|
2866 |
sock_mnt = kern_mount(&sock_fs_type); |
b3e19d924
|
2867 2868 2869 2870 |
if (IS_ERR(sock_mnt)) { err = PTR_ERR(sock_mnt); goto out_mount; } |
77d76ea31
|
2871 2872 |
/* The real protocol initialization is performed in later initcalls. |
1da177e4c
|
2873 2874 2875 |
*/ #ifdef CONFIG_NETFILTER |
6d11cfdba
|
2876 2877 2878 |
err = netfilter_init(); if (err) goto out; |
1da177e4c
|
2879 |
#endif |
cbeb321a6
|
2880 |
|
408eccce3
|
2881 |
ptp_classifier_init(); |
c1f19b51d
|
2882 |
|
b3e19d924
|
2883 2884 2885 2886 2887 2888 2889 |
out: return err; out_mount: unregister_filesystem(&sock_fs_type); out_fs: goto out; |
1da177e4c
|
2890 |
} |
77d76ea31
|
2891 |
core_initcall(sock_init); /* early initcall */ |
1da177e4c
|
2892 2893 2894 |
#ifdef CONFIG_PROC_FS void socket_seq_show(struct seq_file *seq) { |
648845ab7
|
2895 2896 2897 |
seq_printf(seq, "sockets: used %d ", sock_inuse_get(seq->private)); |
1da177e4c
|
2898 |
} |
89bddce58
|
2899 |
#endif /* CONFIG_PROC_FS */ |
1da177e4c
|
2900 |
|
89bbfc95d
|
2901 |
#ifdef CONFIG_COMPAT |
36fd633ec
|
2902 |
static int compat_dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387d
|
2903 |
{ |
6b96018b2
|
2904 |
struct compat_ifconf ifc32; |
7a229387d
|
2905 |
struct ifconf ifc; |
7a229387d
|
2906 |
int err; |
6b96018b2
|
2907 |
if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387d
|
2908 |
return -EFAULT; |
36fd633ec
|
2909 2910 |
ifc.ifc_len = ifc32.ifc_len; ifc.ifc_req = compat_ptr(ifc32.ifcbuf); |
7a229387d
|
2911 |
|
36fd633ec
|
2912 2913 2914 |
rtnl_lock(); err = dev_ifconf(net, &ifc, sizeof(struct compat_ifreq)); rtnl_unlock(); |
7a229387d
|
2915 2916 |
if (err) return err; |
36fd633ec
|
2917 |
ifc32.ifc_len = ifc.ifc_len; |
6b96018b2
|
2918 |
if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387d
|
2919 2920 2921 2922 |
return -EFAULT; return 0; } |
6b96018b2
|
2923 |
static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387d
|
2924 |
{ |
3a7da39d1
|
2925 2926 |
struct compat_ethtool_rxnfc __user *compat_rxnfc; bool convert_in = false, convert_out = false; |
44c02a2c3
|
2927 2928 2929 |
size_t buf_size = 0; struct ethtool_rxnfc __user *rxnfc = NULL; struct ifreq ifr; |
3a7da39d1
|
2930 2931 |
u32 rule_cnt = 0, actual_rule_cnt; u32 ethcmd; |
7a229387d
|
2932 |
u32 data; |
3a7da39d1
|
2933 |
int ret; |
7a229387d
|
2934 |
|
3a7da39d1
|
2935 2936 |
if (get_user(data, &ifr32->ifr_ifru.ifru_data)) return -EFAULT; |
7a229387d
|
2937 |
|
3a7da39d1
|
2938 2939 2940 |
compat_rxnfc = compat_ptr(data); if (get_user(ethcmd, &compat_rxnfc->cmd)) |
7a229387d
|
2941 |
return -EFAULT; |
3a7da39d1
|
2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 |
/* 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
|
2959 |
case ETHTOOL_SRXCLSRLINS: |
3a7da39d1
|
2960 2961 2962 |
convert_out = true; /* fall through */ case ETHTOOL_SRXCLSRLDEL: |
3a7da39d1
|
2963 2964 |
buf_size += sizeof(struct ethtool_rxnfc); convert_in = true; |
44c02a2c3
|
2965 |
rxnfc = compat_alloc_user_space(buf_size); |
3a7da39d1
|
2966 2967 |
break; } |
44c02a2c3
|
2968 |
if (copy_from_user(&ifr.ifr_name, &ifr32->ifr_name, IFNAMSIZ)) |
7a229387d
|
2969 |
return -EFAULT; |
44c02a2c3
|
2970 |
ifr.ifr_data = convert_in ? rxnfc : (void __user *)compat_rxnfc; |
7a229387d
|
2971 |
|
3a7da39d1
|
2972 |
if (convert_in) { |
127fe533a
|
2973 |
/* We expect there to be holes between fs.m_ext and |
3a7da39d1
|
2974 2975 |
* fs.ring_cookie and at the end of fs, but nowhere else. */ |
127fe533a
|
2976 2977 2978 2979 |
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
|
2980 2981 2982 2983 2984 2985 2986 |
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
|
2987 2988 |
(void __user *)(&rxnfc->fs.m_ext + 1) - (void __user *)rxnfc) || |
3a7da39d1
|
2989 2990 |
copy_in_user(&rxnfc->fs.ring_cookie, &compat_rxnfc->fs.ring_cookie, |
954b12445
|
2991 |
(void __user *)(&rxnfc->fs.location + 1) - |
b6168562c
|
2992 2993 2994 2995 2996 2997 2998 2999 |
(void __user *)&rxnfc->fs.ring_cookie)) return -EFAULT; if (ethcmd == ETHTOOL_GRXCLSRLALL) { if (put_user(rule_cnt, &rxnfc->rule_cnt)) return -EFAULT; } else if (copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, sizeof(rxnfc->rule_cnt))) |
3a7da39d1
|
3000 3001 |
return -EFAULT; } |
44c02a2c3
|
3002 |
ret = dev_ioctl(net, SIOCETHTOOL, &ifr, NULL); |
3a7da39d1
|
3003 3004 3005 3006 3007 |
if (ret) return ret; if (convert_out) { if (copy_in_user(compat_rxnfc, rxnfc, |
954b12445
|
3008 3009 |
(const void __user *)(&rxnfc->fs.m_ext + 1) - (const void __user *)rxnfc) || |
3a7da39d1
|
3010 3011 |
copy_in_user(&compat_rxnfc->fs.ring_cookie, &rxnfc->fs.ring_cookie, |
954b12445
|
3012 3013 |
(const void __user *)(&rxnfc->fs.location + 1) - (const void __user *)&rxnfc->fs.ring_cookie) || |
3a7da39d1
|
3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 |
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
|
3039 |
} |
7a50a240c
|
3040 3041 |
static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) { |
7a50a240c
|
3042 |
compat_uptr_t uptr32; |
44c02a2c3
|
3043 3044 3045 |
struct ifreq ifr; void __user *saved; int err; |
7a50a240c
|
3046 |
|
44c02a2c3
|
3047 |
if (copy_from_user(&ifr, uifr32, sizeof(struct compat_ifreq))) |
7a50a240c
|
3048 3049 3050 3051 |
return -EFAULT; if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) return -EFAULT; |
44c02a2c3
|
3052 3053 |
saved = ifr.ifr_settings.ifs_ifsu.raw_hdlc; ifr.ifr_settings.ifs_ifsu.raw_hdlc = compat_ptr(uptr32); |
7a229387d
|
3054 |
|
44c02a2c3
|
3055 3056 3057 3058 3059 |
err = dev_ioctl(net, SIOCWANDEV, &ifr, NULL); if (!err) { ifr.ifr_settings.ifs_ifsu.raw_hdlc = saved; if (copy_to_user(uifr32, &ifr, sizeof(struct compat_ifreq))) err = -EFAULT; |
ccbd6a5a4
|
3060 |
} |
44c02a2c3
|
3061 |
return err; |
7a229387d
|
3062 |
} |
590d4693f
|
3063 3064 |
/* 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
|
3065 |
struct compat_ifreq __user *u_ifreq32) |
7a229387d
|
3066 |
{ |
44c02a2c3
|
3067 |
struct ifreq ifreq; |
7a229387d
|
3068 |
u32 data32; |
44c02a2c3
|
3069 |
if (copy_from_user(ifreq.ifr_name, u_ifreq32->ifr_name, IFNAMSIZ)) |
7a229387d
|
3070 |
return -EFAULT; |
44c02a2c3
|
3071 |
if (get_user(data32, &u_ifreq32->ifr_data)) |
7a229387d
|
3072 |
return -EFAULT; |
44c02a2c3
|
3073 |
ifreq.ifr_data = compat_ptr(data32); |
7a229387d
|
3074 |
|
44c02a2c3
|
3075 |
return dev_ioctl(net, cmd, &ifreq, NULL); |
7a229387d
|
3076 |
} |
37ac39bdd
|
3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 |
static int compat_ifreq_ioctl(struct net *net, struct socket *sock, unsigned int cmd, struct compat_ifreq __user *uifr32) { struct ifreq __user *uifr; int err; /* Handle the fact that while struct ifreq has the same *layout* on * 32/64 for everything but ifreq::ifru_ifmap and ifreq::ifru_data, * which are handled elsewhere, it still has different *size* due to * ifreq::ifru_ifmap (which is 16 bytes on 32 bit, 24 bytes on 64-bit, * resulting in struct ifreq being 32 and 40 bytes respectively). * As a result, if the struct happens to be at the end of a page and * the next page isn't readable/writable, we get a fault. To prevent * that, copy back and forth to the full size. */ 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); if (!err) { switch (cmd) { case SIOCGIFFLAGS: case SIOCGIFMETRIC: case SIOCGIFMTU: case SIOCGIFMEM: case SIOCGIFHWADDR: case SIOCGIFINDEX: case SIOCGIFADDR: case SIOCGIFBRDADDR: case SIOCGIFDSTADDR: case SIOCGIFNETMASK: case SIOCGIFPFLAGS: case SIOCGIFTXQLEN: case SIOCGMIIPHY: case SIOCGMIIREG: |
c6c9fee35
|
3116 |
case SIOCGIFNAME: |
37ac39bdd
|
3117 3118 3119 3120 3121 3122 3123 |
if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) err = -EFAULT; break; } } return err; } |
a2116ed22
|
3124 3125 3126 3127 3128 |
static int compat_sioc_ifmap(struct net *net, unsigned int cmd, struct compat_ifreq __user *uifr32) { struct ifreq ifr; struct compat_ifmap __user *uifmap32; |
a2116ed22
|
3129 3130 3131 3132 |
int err; uifmap32 = &uifr32->ifr_ifru.ifru_map; err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); |
3ddc5b46a
|
3133 3134 3135 3136 3137 3138 |
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
|
3139 3140 |
if (err) return -EFAULT; |
44c02a2c3
|
3141 |
err = dev_ioctl(net, cmd, &ifr, NULL); |
a2116ed22
|
3142 3143 3144 |
if (cmd == SIOCGIFMAP && !err) { err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); |
3ddc5b46a
|
3145 3146 3147 3148 3149 3150 |
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
|
3151 3152 3153 3154 3155 |
if (err) err = -EFAULT; } return err; } |
7a229387d
|
3156 |
struct rtentry32 { |
c6d409cfd
|
3157 |
u32 rt_pad1; |
7a229387d
|
3158 3159 3160 |
struct sockaddr rt_dst; /* target address */ struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ struct sockaddr rt_genmask; /* target network mask (IP) */ |
c6d409cfd
|
3161 3162 3163 3164 3165 3166 3167 |
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
|
3168 |
/* char * */ u32 rt_dev; /* forcing the device at add */ |
c6d409cfd
|
3169 3170 |
u32 rt_mtu; /* per route MTU/Window */ u32 rt_window; /* Window clamping */ |
7a229387d
|
3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 |
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
|
3186 3187 |
static int routing_ioctl(struct net *net, struct socket *sock, unsigned int cmd, void __user *argp) |
7a229387d
|
3188 3189 3190 3191 3192 3193 3194 3195 |
{ 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
|
3196 3197 |
if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ struct in6_rtmsg32 __user *ur6 = argp; |
c6d409cfd
|
3198 |
ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
7a229387d
|
3199 |
3 * sizeof(struct in6_addr)); |
3ddc5b46a
|
3200 3201 3202 3203 3204 3205 3206 |
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
|
3207 3208 3209 |
r = (void *) &r6; } else { /* ipv4 */ |
6b96018b2
|
3210 |
struct rtentry32 __user *ur4 = argp; |
c6d409cfd
|
3211 |
ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
7a229387d
|
3212 |
3 * sizeof(struct sockaddr)); |
3ddc5b46a
|
3213 3214 3215 3216 3217 3218 |
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
|
3219 |
if (rtdev) { |
c6d409cfd
|
3220 |
ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
c3f52ae6a
|
3221 3222 |
r4.rt_dev = (char __user __force *)devname; devname[15] = 0; |
7a229387d
|
3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 |
} else r4.rt_dev = NULL; r = (void *) &r4; } if (ret) { ret = -EFAULT; goto out; } |
c6d409cfd
|
3233 |
set_fs(KERNEL_DS); |
63ff03ab7
|
3234 |
ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
c6d409cfd
|
3235 |
set_fs(old_fs); |
7a229387d
|
3236 3237 |
out: |
7a229387d
|
3238 3239 3240 3241 3242 |
return ret; } /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE * for some operations; this forces use of the newer bridge-utils that |
25985edce
|
3243 |
* use compatible ioctls |
7a229387d
|
3244 |
*/ |
6b96018b2
|
3245 |
static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387d
|
3246 |
{ |
6b96018b2
|
3247 |
compat_ulong_t tmp; |
7a229387d
|
3248 |
|
6b96018b2
|
3249 |
if (get_user(tmp, argp)) |
7a229387d
|
3250 3251 3252 3253 3254 |
return -EFAULT; if (tmp == BRCTL_GET_VERSION) return BRCTL_VERSION + 1; return -EINVAL; } |
6b96018b2
|
3255 3256 3257 3258 3259 3260 |
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
|
3261 |
|
6b96018b2
|
3262 |
if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
590d4693f
|
3263 |
return compat_ifr_data_ioctl(net, cmd, argp); |
6b96018b2
|
3264 3265 3266 3267 3268 |
switch (cmd) { case SIOCSIFBR: case SIOCGIFBR: return old_bridge_ioctl(argp); |
6b96018b2
|
3269 |
case SIOCGIFCONF: |
36fd633ec
|
3270 |
return compat_dev_ifconf(net, argp); |
6b96018b2
|
3271 3272 |
case SIOCETHTOOL: return ethtool_ioctl(net, argp); |
7a50a240c
|
3273 3274 |
case SIOCWANDEV: return compat_siocwandev(net, argp); |
a2116ed22
|
3275 3276 3277 |
case SIOCGIFMAP: case SIOCSIFMAP: return compat_sioc_ifmap(net, cmd, argp); |
6b96018b2
|
3278 3279 3280 |
case SIOCADDRT: case SIOCDELRT: return routing_ioctl(net, sock, cmd, argp); |
0768e1707
|
3281 3282 |
case SIOCGSTAMP_OLD: case SIOCGSTAMPNS_OLD: |
c7cbdbf29
|
3283 3284 |
if (!sock->ops->gettstamp) return -ENOIOCTLCMD; |
0768e1707
|
3285 |
return sock->ops->gettstamp(sock, argp, cmd == SIOCGSTAMP_OLD, |
c7cbdbf29
|
3286 |
!COMPAT_USE_64BIT_TIME); |
590d4693f
|
3287 3288 |
case SIOCBONDSLAVEINFOQUERY: case SIOCBONDINFOQUERY: |
a2116ed22
|
3289 |
case SIOCSHWTSTAMP: |
fd468c74b
|
3290 |
case SIOCGHWTSTAMP: |
590d4693f
|
3291 |
return compat_ifr_data_ioctl(net, cmd, argp); |
6b96018b2
|
3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 |
case FIOSETOWN: case SIOCSPGRP: case FIOGETOWN: case SIOCGPGRP: case SIOCBRADDBR: case SIOCBRDELBR: case SIOCGIFVLAN: case SIOCSIFVLAN: case SIOCADDDLCI: case SIOCDELDLCI: |
c62cce2ca
|
3303 |
case SIOCGSKNS: |
0768e1707
|
3304 3305 |
case SIOCGSTAMP_NEW: case SIOCGSTAMPNS_NEW: |
6b96018b2
|
3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 |
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
|
3321 3322 3323 |
case SIOCGIFADDR: case SIOCSIFADDR: case SIOCSIFHWBROADCAST: |
6b96018b2
|
3324 |
case SIOCDIFADDR: |
6b96018b2
|
3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 |
case SIOCGIFBRDADDR: case SIOCSIFBRDADDR: case SIOCGIFDSTADDR: case SIOCSIFDSTADDR: case SIOCGIFNETMASK: case SIOCSIFNETMASK: case SIOCSIFPFLAGS: case SIOCGIFPFLAGS: case SIOCGIFTXQLEN: case SIOCSIFTXQLEN: case SIOCBRADDIF: case SIOCBRDELIF: |
c6c9fee35
|
3337 |
case SIOCGIFNAME: |
9177efd39
|
3338 3339 3340 3341 |
case SIOCSIFNAME: case SIOCGMIIPHY: case SIOCGMIIREG: case SIOCSMIIREG: |
f92d4fc95
|
3342 3343 3344 3345 |
case SIOCBONDENSLAVE: case SIOCBONDRELEASE: case SIOCBONDSETHWADDR: case SIOCBONDCHANGEACTIVE: |
37ac39bdd
|
3346 |
return compat_ifreq_ioctl(net, sock, cmd, argp); |
6b96018b2
|
3347 3348 3349 |
case SIOCSARP: case SIOCGARP: case SIOCDARP: |
c7dc504e2
|
3350 |
case SIOCOUTQ: |
9d7bf41fa
|
3351 |
case SIOCOUTQNSD: |
6b96018b2
|
3352 |
case SIOCATMARK: |
63ff03ab7
|
3353 |
return sock_do_ioctl(net, sock, cmd, arg); |
9177efd39
|
3354 |
} |
6b96018b2
|
3355 3356 |
return -ENOIOCTLCMD; } |
7a229387d
|
3357 |
|
95c961747
|
3358 |
static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
89bddce58
|
3359 |
unsigned long arg) |
89bbfc95d
|
3360 3361 3362 |
{ struct socket *sock = file->private_data; int ret = -ENOIOCTLCMD; |
87de87d5e
|
3363 3364 3365 3366 3367 |
struct sock *sk; struct net *net; sk = sock->sk; net = sock_net(sk); |
89bbfc95d
|
3368 3369 3370 |
if (sock->ops->compat_ioctl) ret = sock->ops->compat_ioctl(sock, cmd, arg); |
87de87d5e
|
3371 3372 3373 |
if (ret == -ENOIOCTLCMD && (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) ret = compat_wext_handle_ioctl(net, cmd, arg); |
6b96018b2
|
3374 3375 |
if (ret == -ENOIOCTLCMD) ret = compat_sock_ioctl_trans(file, sock, cmd, arg); |
89bbfc95d
|
3376 3377 3378 |
return ret; } #endif |
8a3c245c0
|
3379 3380 3381 3382 3383 3384 3385 3386 |
/** * kernel_bind - bind an address to a socket (kernel space) * @sock: socket * @addr: address * @addrlen: length of address * * Returns 0 or an error. */ |
ac5a488ef
|
3387 3388 3389 3390 |
int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) { return sock->ops->bind(sock, addr, addrlen); } |
c6d409cfd
|
3391 |
EXPORT_SYMBOL(kernel_bind); |
ac5a488ef
|
3392 |
|
8a3c245c0
|
3393 3394 3395 3396 3397 3398 3399 |
/** * kernel_listen - move socket to listening state (kernel space) * @sock: socket * @backlog: pending connections queue size * * Returns 0 or an error. */ |
ac5a488ef
|
3400 3401 3402 3403 |
int kernel_listen(struct socket *sock, int backlog) { return sock->ops->listen(sock, backlog); } |
c6d409cfd
|
3404 |
EXPORT_SYMBOL(kernel_listen); |
ac5a488ef
|
3405 |
|
8a3c245c0
|
3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 |
/** * kernel_accept - accept a connection (kernel space) * @sock: listening socket * @newsock: new connected socket * @flags: flags * * @flags must be SOCK_CLOEXEC, SOCK_NONBLOCK or 0. * If it fails, @newsock is guaranteed to be %NULL. * Returns 0 or an error. */ |
ac5a488ef
|
3416 3417 3418 3419 3420 3421 3422 3423 3424 |
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; |
cdfbabfb2
|
3425 |
err = sock->ops->accept(sock, *newsock, flags, true); |
ac5a488ef
|
3426 3427 |
if (err < 0) { sock_release(*newsock); |
fa8705b00
|
3428 |
*newsock = NULL; |
ac5a488ef
|
3429 3430 3431 3432 |
goto done; } (*newsock)->ops = sock->ops; |
1b08534e5
|
3433 |
__module_get((*newsock)->ops->owner); |
ac5a488ef
|
3434 3435 3436 3437 |
done: return err; } |
c6d409cfd
|
3438 |
EXPORT_SYMBOL(kernel_accept); |
ac5a488ef
|
3439 |
|
8a3c245c0
|
3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 |
/** * kernel_connect - connect a socket (kernel space) * @sock: socket * @addr: address * @addrlen: address length * @flags: flags (O_NONBLOCK, ...) * * For datagram sockets, @addr is the addres to which datagrams are sent * by default, and the only address from which datagrams are received. * For stream sockets, attempts to connect to @addr. * Returns 0 or an error code. */ |
ac5a488ef
|
3452 |
int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, |
4768fbcbc
|
3453 |
int flags) |
ac5a488ef
|
3454 3455 3456 |
{ return sock->ops->connect(sock, addr, addrlen, flags); } |
c6d409cfd
|
3457 |
EXPORT_SYMBOL(kernel_connect); |
ac5a488ef
|
3458 |
|
8a3c245c0
|
3459 3460 3461 3462 3463 3464 3465 3466 |
/** * kernel_getsockname - get the address which the socket is bound (kernel space) * @sock: socket * @addr: address holder * * Fills the @addr pointer with the address which the socket is bound. * Returns 0 or an error code. */ |
9b2c45d47
|
3467 |
int kernel_getsockname(struct socket *sock, struct sockaddr *addr) |
ac5a488ef
|
3468 |
{ |
9b2c45d47
|
3469 |
return sock->ops->getname(sock, addr, 0); |
ac5a488ef
|
3470 |
} |
c6d409cfd
|
3471 |
EXPORT_SYMBOL(kernel_getsockname); |
ac5a488ef
|
3472 |
|
8a3c245c0
|
3473 3474 3475 3476 3477 3478 3479 3480 |
/** * kernel_peername - get the address which the socket is connected (kernel space) * @sock: socket * @addr: address holder * * Fills the @addr pointer with the address which the socket is connected. * Returns 0 or an error code. */ |
9b2c45d47
|
3481 |
int kernel_getpeername(struct socket *sock, struct sockaddr *addr) |
ac5a488ef
|
3482 |
{ |
9b2c45d47
|
3483 |
return sock->ops->getname(sock, addr, 1); |
ac5a488ef
|
3484 |
} |
c6d409cfd
|
3485 |
EXPORT_SYMBOL(kernel_getpeername); |
ac5a488ef
|
3486 |
|
8a3c245c0
|
3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 |
/** * kernel_getsockopt - get a socket option (kernel space) * @sock: socket * @level: API level (SOL_SOCKET, ...) * @optname: option tag * @optval: option value * @optlen: option length * * Assigns the option length to @optlen. * Returns 0 or an error. */ |
ac5a488ef
|
3498 3499 3500 3501 |
int kernel_getsockopt(struct socket *sock, int level, int optname, char *optval, int *optlen) { mm_segment_t oldfs = get_fs(); |
fb8621bb6
|
3502 3503 |
char __user *uoptval; int __user *uoptlen; |
ac5a488ef
|
3504 |
int err; |
fb8621bb6
|
3505 3506 |
uoptval = (char __user __force *) optval; uoptlen = (int __user __force *) optlen; |
ac5a488ef
|
3507 3508 |
set_fs(KERNEL_DS); if (level == SOL_SOCKET) |
fb8621bb6
|
3509 |
err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
ac5a488ef
|
3510 |
else |
fb8621bb6
|
3511 3512 |
err = sock->ops->getsockopt(sock, level, optname, uoptval, uoptlen); |
ac5a488ef
|
3513 3514 3515 |
set_fs(oldfs); return err; } |
c6d409cfd
|
3516 |
EXPORT_SYMBOL(kernel_getsockopt); |
ac5a488ef
|
3517 |
|
8a3c245c0
|
3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 |
/** * kernel_setsockopt - set a socket option (kernel space) * @sock: socket * @level: API level (SOL_SOCKET, ...) * @optname: option tag * @optval: option value * @optlen: option length * * Returns 0 or an error. */ |
ac5a488ef
|
3528 |
int kernel_setsockopt(struct socket *sock, int level, int optname, |
b7058842c
|
3529 |
char *optval, unsigned int optlen) |
ac5a488ef
|
3530 3531 |
{ mm_segment_t oldfs = get_fs(); |
fb8621bb6
|
3532 |
char __user *uoptval; |
ac5a488ef
|
3533 |
int err; |
fb8621bb6
|
3534 |
uoptval = (char __user __force *) optval; |
ac5a488ef
|
3535 3536 |
set_fs(KERNEL_DS); if (level == SOL_SOCKET) |
fb8621bb6
|
3537 |
err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
ac5a488ef
|
3538 |
else |
fb8621bb6
|
3539 |
err = sock->ops->setsockopt(sock, level, optname, uoptval, |
ac5a488ef
|
3540 3541 3542 3543 |
optlen); set_fs(oldfs); return err; } |
c6d409cfd
|
3544 |
EXPORT_SYMBOL(kernel_setsockopt); |
ac5a488ef
|
3545 |
|
8a3c245c0
|
3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 |
/** * kernel_sendpage - send a &page through a socket (kernel space) * @sock: socket * @page: page * @offset: page offset * @size: total size in bytes * @flags: flags (MSG_DONTWAIT, ...) * * Returns the total amount sent in bytes or an error. */ |
ac5a488ef
|
3556 3557 3558 3559 3560 3561 3562 3563 |
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
|
3564 |
EXPORT_SYMBOL(kernel_sendpage); |
ac5a488ef
|
3565 |
|
8a3c245c0
|
3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 |
/** * kernel_sendpage_locked - send a &page through the locked sock (kernel space) * @sk: sock * @page: page * @offset: page offset * @size: total size in bytes * @flags: flags (MSG_DONTWAIT, ...) * * Returns the total amount sent in bytes or an error. * Caller must hold @sk. */ |
306b13eb3
|
3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 |
int kernel_sendpage_locked(struct sock *sk, struct page *page, int offset, size_t size, int flags) { struct socket *sock = sk->sk_socket; if (sock->ops->sendpage_locked) return sock->ops->sendpage_locked(sk, page, offset, size, flags); return sock_no_sendpage_locked(sk, page, offset, size, flags); } EXPORT_SYMBOL(kernel_sendpage_locked); |
8a3c245c0
|
3589 3590 3591 3592 3593 3594 3595 |
/** * kernel_shutdown - shut down part of a full-duplex connection (kernel space) * @sock: socket * @how: connection part * * Returns 0 or an error. */ |
91cf45f02
|
3596 3597 3598 3599 |
int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) { return sock->ops->shutdown(sock, how); } |
91cf45f02
|
3600 |
EXPORT_SYMBOL(kernel_sock_shutdown); |
113c30759
|
3601 |
|
8a3c245c0
|
3602 3603 3604 3605 3606 3607 3608 3609 |
/** * kernel_sock_ip_overhead - returns the IP overhead imposed by a socket * @sk: socket * * This routine returns the IP overhead imposed by a socket i.e. * the length of the underlying IP header, depending on whether * this is an IPv4 or IPv6 socket and the length from IP options turned * on at the socket. Assumes that the caller has a lock on the socket. |
113c30759
|
3610 |
*/ |
8a3c245c0
|
3611 |
|
113c30759
|
3612 3613 3614 3615 3616 |
u32 kernel_sock_ip_overhead(struct sock *sk) { struct inet_sock *inet; struct ip_options_rcu *opt; u32 overhead = 0; |
113c30759
|
3617 3618 3619 3620 3621 3622 3623 |
#if IS_ENABLED(CONFIG_IPV6) struct ipv6_pinfo *np; struct ipv6_txoptions *optv6 = NULL; #endif /* IS_ENABLED(CONFIG_IPV6) */ if (!sk) return overhead; |
113c30759
|
3624 3625 3626 3627 3628 |
switch (sk->sk_family) { case AF_INET: inet = inet_sk(sk); overhead += sizeof(struct iphdr); opt = rcu_dereference_protected(inet->inet_opt, |
614d79c09
|
3629 |
sock_owned_by_user(sk)); |
113c30759
|
3630 3631 3632 3633 3634 3635 3636 3637 3638 |
if (opt) overhead += opt->opt.optlen; return overhead; #if IS_ENABLED(CONFIG_IPV6) case AF_INET6: np = inet6_sk(sk); overhead += sizeof(struct ipv6hdr); if (np) optv6 = rcu_dereference_protected(np->opt, |
614d79c09
|
3639 |
sock_owned_by_user(sk)); |
113c30759
|
3640 3641 3642 3643 3644 3645 3646 3647 3648 |
if (optv6) overhead += (optv6->opt_flen + optv6->opt_nflen); return overhead; #endif /* IS_ENABLED(CONFIG_IPV6) */ default: /* Returns 0 overhead if the socket is not ipv4 or ipv6 */ return overhead; } } EXPORT_SYMBOL(kernel_sock_ip_overhead); |