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61#include <linux/mm.h>
62#include <linux/socket.h>
63#include <linux/file.h>
64#include <linux/net.h>
65#include <linux/interrupt.h>
66#include <linux/thread_info.h>
67#include <linux/rcupdate.h>
68#include <linux/netdevice.h>
69#include <linux/proc_fs.h>
70#include <linux/seq_file.h>
71#include <linux/mutex.h>
72#include <linux/if_bridge.h>
73#include <linux/if_frad.h>
74#include <linux/if_vlan.h>
75#include <linux/ptp_classify.h>
76#include <linux/init.h>
77#include <linux/poll.h>
78#include <linux/cache.h>
79#include <linux/module.h>
80#include <linux/highmem.h>
81#include <linux/mount.h>
82#include <linux/security.h>
83#include <linux/syscalls.h>
84#include <linux/compat.h>
85#include <linux/kmod.h>
86#include <linux/audit.h>
87#include <linux/wireless.h>
88#include <linux/nsproxy.h>
89#include <linux/magic.h>
90#include <linux/slab.h>
91#include <linux/xattr.h>
92
93#include <linux/uaccess.h>
94#include <asm/unistd.h>
95
96#include <net/compat.h>
97#include <net/wext.h>
98#include <net/cls_cgroup.h>
99
100#include <net/sock.h>
101#include <linux/netfilter.h>
102
103#include <linux/if_tun.h>
104#include <linux/ipv6_route.h>
105#include <linux/route.h>
106#include <linux/sockios.h>
107#include <net/busy_poll.h>
108#include <linux/errqueue.h>
109
110#ifdef CONFIG_NET_RX_BUSY_POLL
111unsigned int sysctl_net_busy_read __read_mostly;
112unsigned int sysctl_net_busy_poll __read_mostly;
113#endif
114
115static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to);
116static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from);
117static int sock_mmap(struct file *file, struct vm_area_struct *vma);
118
119static int sock_close(struct inode *inode, struct file *file);
120static __poll_t sock_poll(struct file *file,
121 struct poll_table_struct *wait);
122static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
123#ifdef CONFIG_COMPAT
124static long compat_sock_ioctl(struct file *file,
125 unsigned int cmd, unsigned long arg);
126#endif
127static int sock_fasync(int fd, struct file *filp, int on);
128static ssize_t sock_sendpage(struct file *file, struct page *page,
129 int offset, size_t size, loff_t *ppos, int more);
130static ssize_t sock_splice_read(struct file *file, loff_t *ppos,
131 struct pipe_inode_info *pipe, size_t len,
132 unsigned int flags);
133
134
135
136
137
138
139static const struct file_operations socket_file_ops = {
140 .owner = THIS_MODULE,
141 .llseek = no_llseek,
142 .read_iter = sock_read_iter,
143 .write_iter = sock_write_iter,
144 .poll = sock_poll,
145 .unlocked_ioctl = sock_ioctl,
146#ifdef CONFIG_COMPAT
147 .compat_ioctl = compat_sock_ioctl,
148#endif
149 .mmap = sock_mmap,
150 .release = sock_close,
151 .fasync = sock_fasync,
152 .sendpage = sock_sendpage,
153 .splice_write = generic_splice_sendpage,
154 .splice_read = sock_splice_read,
155};
156
157
158
159
160
161static DEFINE_SPINLOCK(net_family_lock);
162static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly;
163
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180
181int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr)
182{
183 if (ulen < 0 || ulen > sizeof(struct sockaddr_storage))
184 return -EINVAL;
185 if (ulen == 0)
186 return 0;
187 if (copy_from_user(kaddr, uaddr, ulen))
188 return -EFAULT;
189 return audit_sockaddr(ulen, kaddr);
190}
191
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207
208
209static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen,
210 void __user *uaddr, int __user *ulen)
211{
212 int err;
213 int len;
214
215 BUG_ON(klen > sizeof(struct sockaddr_storage));
216 err = get_user(len, ulen);
217 if (err)
218 return err;
219 if (len > klen)
220 len = klen;
221 if (len < 0)
222 return -EINVAL;
223 if (len) {
224 if (audit_sockaddr(klen, kaddr))
225 return -ENOMEM;
226 if (copy_to_user(uaddr, kaddr, len))
227 return -EFAULT;
228 }
229
230
231
232
233 return __put_user(klen, ulen);
234}
235
236static struct kmem_cache *sock_inode_cachep __ro_after_init;
237
238static struct inode *sock_alloc_inode(struct super_block *sb)
239{
240 struct socket_alloc *ei;
241 struct socket_wq *wq;
242
243 ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL);
244 if (!ei)
245 return NULL;
246 wq = kmalloc(sizeof(*wq), GFP_KERNEL);
247 if (!wq) {
248 kmem_cache_free(sock_inode_cachep, ei);
249 return NULL;
250 }
251 init_waitqueue_head(&wq->wait);
252 wq->fasync_list = NULL;
253 wq->flags = 0;
254 RCU_INIT_POINTER(ei->socket.wq, wq);
255
256 ei->socket.state = SS_UNCONNECTED;
257 ei->socket.flags = 0;
258 ei->socket.ops = NULL;
259 ei->socket.sk = NULL;
260 ei->socket.file = NULL;
261
262 return &ei->vfs_inode;
263}
264
265static void sock_destroy_inode(struct inode *inode)
266{
267 struct socket_alloc *ei;
268 struct socket_wq *wq;
269
270 ei = container_of(inode, struct socket_alloc, vfs_inode);
271 wq = rcu_dereference_protected(ei->socket.wq, 1);
272 kfree_rcu(wq, rcu);
273 kmem_cache_free(sock_inode_cachep, ei);
274}
275
276static void init_once(void *foo)
277{
278 struct socket_alloc *ei = (struct socket_alloc *)foo;
279
280 inode_init_once(&ei->vfs_inode);
281}
282
283static void init_inodecache(void)
284{
285 sock_inode_cachep = kmem_cache_create("sock_inode_cache",
286 sizeof(struct socket_alloc),
287 0,
288 (SLAB_HWCACHE_ALIGN |
289 SLAB_RECLAIM_ACCOUNT |
290 SLAB_MEM_SPREAD | SLAB_ACCOUNT),
291 init_once);
292 BUG_ON(sock_inode_cachep == NULL);
293}
294
295static const struct super_operations sockfs_ops = {
296 .alloc_inode = sock_alloc_inode,
297 .destroy_inode = sock_destroy_inode,
298 .statfs = simple_statfs,
299};
300
301
302
303
304static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen)
305{
306 return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]",
307 d_inode(dentry)->i_ino);
308}
309
310static const struct dentry_operations sockfs_dentry_operations = {
311 .d_dname = sockfs_dname,
312};
313
314static int sockfs_xattr_get(const struct xattr_handler *handler,
315 struct dentry *dentry, struct inode *inode,
316 const char *suffix, void *value, size_t size)
317{
318 if (value) {
319 if (dentry->d_name.len + 1 > size)
320 return -ERANGE;
321 memcpy(value, dentry->d_name.name, dentry->d_name.len + 1);
322 }
323 return dentry->d_name.len + 1;
324}
325
326#define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname"
327#define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX)
328#define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1)
329
330static const struct xattr_handler sockfs_xattr_handler = {
331 .name = XATTR_NAME_SOCKPROTONAME,
332 .get = sockfs_xattr_get,
333};
334
335static int sockfs_security_xattr_set(const struct xattr_handler *handler,
336 struct dentry *dentry, struct inode *inode,
337 const char *suffix, const void *value,
338 size_t size, int flags)
339{
340
341 return -EAGAIN;
342}
343
344static const struct xattr_handler sockfs_security_xattr_handler = {
345 .prefix = XATTR_SECURITY_PREFIX,
346 .set = sockfs_security_xattr_set,
347};
348
349static const struct xattr_handler *sockfs_xattr_handlers[] = {
350 &sockfs_xattr_handler,
351 &sockfs_security_xattr_handler,
352 NULL
353};
354
355static struct dentry *sockfs_mount(struct file_system_type *fs_type,
356 int flags, const char *dev_name, void *data)
357{
358 return mount_pseudo_xattr(fs_type, "socket:", &sockfs_ops,
359 sockfs_xattr_handlers,
360 &sockfs_dentry_operations, SOCKFS_MAGIC);
361}
362
363static struct vfsmount *sock_mnt __read_mostly;
364
365static struct file_system_type sock_fs_type = {
366 .name = "sockfs",
367 .mount = sockfs_mount,
368 .kill_sb = kill_anon_super,
369};
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387
388struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname)
389{
390 struct qstr name = { .name = "" };
391 struct path path;
392 struct file *file;
393
394 if (dname) {
395 name.name = dname;
396 name.len = strlen(name.name);
397 } else if (sock->sk) {
398 name.name = sock->sk->sk_prot_creator->name;
399 name.len = strlen(name.name);
400 }
401 path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name);
402 if (unlikely(!path.dentry)) {
403 sock_release(sock);
404 return ERR_PTR(-ENOMEM);
405 }
406 path.mnt = mntget(sock_mnt);
407
408 d_instantiate(path.dentry, SOCK_INODE(sock));
409
410 file = alloc_file(&path, FMODE_READ | FMODE_WRITE,
411 &socket_file_ops);
412 if (IS_ERR(file)) {
413
414 ihold(d_inode(path.dentry));
415 path_put(&path);
416
417 sock_release(sock);
418 return file;
419 }
420
421 sock->file = file;
422 file->f_flags = O_RDWR | (flags & O_NONBLOCK);
423 file->private_data = sock;
424 return file;
425}
426EXPORT_SYMBOL(sock_alloc_file);
427
428static int sock_map_fd(struct socket *sock, int flags)
429{
430 struct file *newfile;
431 int fd = get_unused_fd_flags(flags);
432 if (unlikely(fd < 0)) {
433 sock_release(sock);
434 return fd;
435 }
436
437 newfile = sock_alloc_file(sock, flags, NULL);
438 if (likely(!IS_ERR(newfile))) {
439 fd_install(fd, newfile);
440 return fd;
441 }
442
443 put_unused_fd(fd);
444 return PTR_ERR(newfile);
445}
446
447struct socket *sock_from_file(struct file *file, int *err)
448{
449 if (file->f_op == &socket_file_ops)
450 return file->private_data;
451
452 *err = -ENOTSOCK;
453 return NULL;
454}
455EXPORT_SYMBOL(sock_from_file);
456
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469
470struct socket *sockfd_lookup(int fd, int *err)
471{
472 struct file *file;
473 struct socket *sock;
474
475 file = fget(fd);
476 if (!file) {
477 *err = -EBADF;
478 return NULL;
479 }
480
481 sock = sock_from_file(file, err);
482 if (!sock)
483 fput(file);
484 return sock;
485}
486EXPORT_SYMBOL(sockfd_lookup);
487
488static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed)
489{
490 struct fd f = fdget(fd);
491 struct socket *sock;
492
493 *err = -EBADF;
494 if (f.file) {
495 sock = sock_from_file(f.file, err);
496 if (likely(sock)) {
497 *fput_needed = f.flags;
498 return sock;
499 }
500 fdput(f);
501 }
502 return NULL;
503}
504
505static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer,
506 size_t size)
507{
508 ssize_t len;
509 ssize_t used = 0;
510
511 len = security_inode_listsecurity(d_inode(dentry), buffer, size);
512 if (len < 0)
513 return len;
514 used += len;
515 if (buffer) {
516 if (size < used)
517 return -ERANGE;
518 buffer += len;
519 }
520
521 len = (XATTR_NAME_SOCKPROTONAME_LEN + 1);
522 used += len;
523 if (buffer) {
524 if (size < used)
525 return -ERANGE;
526 memcpy(buffer, XATTR_NAME_SOCKPROTONAME, len);
527 buffer += len;
528 }
529
530 return used;
531}
532
533static int sockfs_setattr(struct dentry *dentry, struct iattr *iattr)
534{
535 int err = simple_setattr(dentry, iattr);
536
537 if (!err && (iattr->ia_valid & ATTR_UID)) {
538 struct socket *sock = SOCKET_I(d_inode(dentry));
539
540 sock->sk->sk_uid = iattr->ia_uid;
541 }
542
543 return err;
544}
545
546static const struct inode_operations sockfs_inode_ops = {
547 .listxattr = sockfs_listxattr,
548 .setattr = sockfs_setattr,
549};
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559struct socket *sock_alloc(void)
560{
561 struct inode *inode;
562 struct socket *sock;
563
564 inode = new_inode_pseudo(sock_mnt->mnt_sb);
565 if (!inode)
566 return NULL;
567
568 sock = SOCKET_I(inode);
569
570 inode->i_ino = get_next_ino();
571 inode->i_mode = S_IFSOCK | S_IRWXUGO;
572 inode->i_uid = current_fsuid();
573 inode->i_gid = current_fsgid();
574 inode->i_op = &sockfs_inode_ops;
575
576 return sock;
577}
578EXPORT_SYMBOL(sock_alloc);
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589void sock_release(struct socket *sock)
590{
591 if (sock->ops) {
592 struct module *owner = sock->ops->owner;
593
594 sock->ops->release(sock);
595 sock->ops = NULL;
596 module_put(owner);
597 }
598
599 if (rcu_dereference_protected(sock->wq, 1)->fasync_list)
600 pr_err("%s: fasync list not empty!\n", __func__);
601
602 if (!sock->file) {
603 iput(SOCK_INODE(sock));
604 return;
605 }
606 sock->file = NULL;
607}
608EXPORT_SYMBOL(sock_release);
609
610void __sock_tx_timestamp(__u16 tsflags, __u8 *tx_flags)
611{
612 u8 flags = *tx_flags;
613
614 if (tsflags & SOF_TIMESTAMPING_TX_HARDWARE)
615 flags |= SKBTX_HW_TSTAMP;
616
617 if (tsflags & SOF_TIMESTAMPING_TX_SOFTWARE)
618 flags |= SKBTX_SW_TSTAMP;
619
620 if (tsflags & SOF_TIMESTAMPING_TX_SCHED)
621 flags |= SKBTX_SCHED_TSTAMP;
622
623 *tx_flags = flags;
624}
625EXPORT_SYMBOL(__sock_tx_timestamp);
626
627static inline int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg)
628{
629 int ret = sock->ops->sendmsg(sock, msg, msg_data_left(msg));
630 BUG_ON(ret == -EIOCBQUEUED);
631 return ret;
632}
633
634int sock_sendmsg(struct socket *sock, struct msghdr *msg)
635{
636 int err = security_socket_sendmsg(sock, msg,
637 msg_data_left(msg));
638
639 return err ?: sock_sendmsg_nosec(sock, msg);
640}
641EXPORT_SYMBOL(sock_sendmsg);
642
643int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
644 struct kvec *vec, size_t num, size_t size)
645{
646 iov_iter_kvec(&msg->msg_iter, WRITE | ITER_KVEC, vec, num, size);
647 return sock_sendmsg(sock, msg);
648}
649EXPORT_SYMBOL(kernel_sendmsg);
650
651int kernel_sendmsg_locked(struct sock *sk, struct msghdr *msg,
652 struct kvec *vec, size_t num, size_t size)
653{
654 struct socket *sock = sk->sk_socket;
655
656 if (!sock->ops->sendmsg_locked)
657 return sock_no_sendmsg_locked(sk, msg, size);
658
659 iov_iter_kvec(&msg->msg_iter, WRITE | ITER_KVEC, vec, num, size);
660
661 return sock->ops->sendmsg_locked(sk, msg, msg_data_left(msg));
662}
663EXPORT_SYMBOL(kernel_sendmsg_locked);
664
665static bool skb_is_err_queue(const struct sk_buff *skb)
666{
667
668
669
670
671
672 return skb->pkt_type == PACKET_OUTGOING;
673}
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682
683static bool skb_is_swtx_tstamp(const struct sk_buff *skb, int false_tstamp)
684{
685 return skb->tstamp && !false_tstamp && skb_is_err_queue(skb);
686}
687
688static void put_ts_pktinfo(struct msghdr *msg, struct sk_buff *skb)
689{
690 struct scm_ts_pktinfo ts_pktinfo;
691 struct net_device *orig_dev;
692
693 if (!skb_mac_header_was_set(skb))
694 return;
695
696 memset(&ts_pktinfo, 0, sizeof(ts_pktinfo));
697
698 rcu_read_lock();
699 orig_dev = dev_get_by_napi_id(skb_napi_id(skb));
700 if (orig_dev)
701 ts_pktinfo.if_index = orig_dev->ifindex;
702 rcu_read_unlock();
703
704 ts_pktinfo.pkt_length = skb->len - skb_mac_offset(skb);
705 put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPING_PKTINFO,
706 sizeof(ts_pktinfo), &ts_pktinfo);
707}
708
709
710
711
712void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
713 struct sk_buff *skb)
714{
715 int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP);
716 struct scm_timestamping tss;
717 int empty = 1, false_tstamp = 0;
718 struct skb_shared_hwtstamps *shhwtstamps =
719 skb_hwtstamps(skb);
720
721
722
723 if (need_software_tstamp && skb->tstamp == 0) {
724 __net_timestamp(skb);
725 false_tstamp = 1;
726 }
727
728 if (need_software_tstamp) {
729 if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) {
730 struct timeval tv;
731 skb_get_timestamp(skb, &tv);
732 put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP,
733 sizeof(tv), &tv);
734 } else {
735 struct timespec ts;
736 skb_get_timestampns(skb, &ts);
737 put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS,
738 sizeof(ts), &ts);
739 }
740 }
741
742 memset(&tss, 0, sizeof(tss));
743 if ((sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE) &&
744 ktime_to_timespec_cond(skb->tstamp, tss.ts + 0))
745 empty = 0;
746 if (shhwtstamps &&
747 (sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE) &&
748 !skb_is_swtx_tstamp(skb, false_tstamp) &&
749 ktime_to_timespec_cond(shhwtstamps->hwtstamp, tss.ts + 2)) {
750 empty = 0;
751 if ((sk->sk_tsflags & SOF_TIMESTAMPING_OPT_PKTINFO) &&
752 !skb_is_err_queue(skb))
753 put_ts_pktinfo(msg, skb);
754 }
755 if (!empty) {
756 put_cmsg(msg, SOL_SOCKET,
757 SCM_TIMESTAMPING, sizeof(tss), &tss);
758
759 if (skb_is_err_queue(skb) && skb->len &&
760 SKB_EXT_ERR(skb)->opt_stats)
761 put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPING_OPT_STATS,
762 skb->len, skb->data);
763 }
764}
765EXPORT_SYMBOL_GPL(__sock_recv_timestamp);
766
767void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk,
768 struct sk_buff *skb)
769{
770 int ack;
771
772 if (!sock_flag(sk, SOCK_WIFI_STATUS))
773 return;
774 if (!skb->wifi_acked_valid)
775 return;
776
777 ack = skb->wifi_acked;
778
779 put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack);
780}
781EXPORT_SYMBOL_GPL(__sock_recv_wifi_status);
782
783static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk,
784 struct sk_buff *skb)
785{
786 if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && SOCK_SKB_CB(skb)->dropcount)
787 put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL,
788 sizeof(__u32), &SOCK_SKB_CB(skb)->dropcount);
789}
790
791void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
792 struct sk_buff *skb)
793{
794 sock_recv_timestamp(msg, sk, skb);
795 sock_recv_drops(msg, sk, skb);
796}
797EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops);
798
799static inline int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg,
800 int flags)
801{
802 return sock->ops->recvmsg(sock, msg, msg_data_left(msg), flags);
803}
804
805int sock_recvmsg(struct socket *sock, struct msghdr *msg, int flags)
806{
807 int err = security_socket_recvmsg(sock, msg, msg_data_left(msg), flags);
808
809 return err ?: sock_recvmsg_nosec(sock, msg, flags);
810}
811EXPORT_SYMBOL(sock_recvmsg);
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826
827
828int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
829 struct kvec *vec, size_t num, size_t size, int flags)
830{
831 mm_segment_t oldfs = get_fs();
832 int result;
833
834 iov_iter_kvec(&msg->msg_iter, READ | ITER_KVEC, vec, num, size);
835 set_fs(KERNEL_DS);
836 result = sock_recvmsg(sock, msg, flags);
837 set_fs(oldfs);
838 return result;
839}
840EXPORT_SYMBOL(kernel_recvmsg);
841
842static ssize_t sock_sendpage(struct file *file, struct page *page,
843 int offset, size_t size, loff_t *ppos, int more)
844{
845 struct socket *sock;
846 int flags;
847
848 sock = file->private_data;
849
850 flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0;
851
852 flags |= more;
853
854 return kernel_sendpage(sock, page, offset, size, flags);
855}
856
857static ssize_t sock_splice_read(struct file *file, loff_t *ppos,
858 struct pipe_inode_info *pipe, size_t len,
859 unsigned int flags)
860{
861 struct socket *sock = file->private_data;
862
863 if (unlikely(!sock->ops->splice_read))
864 return -EINVAL;
865
866 return sock->ops->splice_read(sock, ppos, pipe, len, flags);
867}
868
869static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to)
870{
871 struct file *file = iocb->ki_filp;
872 struct socket *sock = file->private_data;
873 struct msghdr msg = {.msg_iter = *to,
874 .msg_iocb = iocb};
875 ssize_t res;
876
877 if (file->f_flags & O_NONBLOCK)
878 msg.msg_flags = MSG_DONTWAIT;
879
880 if (iocb->ki_pos != 0)
881 return -ESPIPE;
882
883 if (!iov_iter_count(to))
884 return 0;
885
886 res = sock_recvmsg(sock, &msg, msg.msg_flags);
887 *to = msg.msg_iter;
888 return res;
889}
890
891static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from)
892{
893 struct file *file = iocb->ki_filp;
894 struct socket *sock = file->private_data;
895 struct msghdr msg = {.msg_iter = *from,
896 .msg_iocb = iocb};
897 ssize_t res;
898
899 if (iocb->ki_pos != 0)
900 return -ESPIPE;
901
902 if (file->f_flags & O_NONBLOCK)
903 msg.msg_flags = MSG_DONTWAIT;
904
905 if (sock->type == SOCK_SEQPACKET)
906 msg.msg_flags |= MSG_EOR;
907
908 res = sock_sendmsg(sock, &msg);
909 *from = msg.msg_iter;
910 return res;
911}
912
913
914
915
916
917
918static DEFINE_MUTEX(br_ioctl_mutex);
919static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg);
920
921void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *))
922{
923 mutex_lock(&br_ioctl_mutex);
924 br_ioctl_hook = hook;
925 mutex_unlock(&br_ioctl_mutex);
926}
927EXPORT_SYMBOL(brioctl_set);
928
929static DEFINE_MUTEX(vlan_ioctl_mutex);
930static int (*vlan_ioctl_hook) (struct net *, void __user *arg);
931
932void vlan_ioctl_set(int (*hook) (struct net *, void __user *))
933{
934 mutex_lock(&vlan_ioctl_mutex);
935 vlan_ioctl_hook = hook;
936 mutex_unlock(&vlan_ioctl_mutex);
937}
938EXPORT_SYMBOL(vlan_ioctl_set);
939
940static DEFINE_MUTEX(dlci_ioctl_mutex);
941static int (*dlci_ioctl_hook) (unsigned int, void __user *);
942
943void dlci_ioctl_set(int (*hook) (unsigned int, void __user *))
944{
945 mutex_lock(&dlci_ioctl_mutex);
946 dlci_ioctl_hook = hook;
947 mutex_unlock(&dlci_ioctl_mutex);
948}
949EXPORT_SYMBOL(dlci_ioctl_set);
950
951static long sock_do_ioctl(struct net *net, struct socket *sock,
952 unsigned int cmd, unsigned long arg)
953{
954 int err;
955 void __user *argp = (void __user *)arg;
956
957 err = sock->ops->ioctl(sock, cmd, arg);
958
959
960
961
962
963 if (err != -ENOIOCTLCMD)
964 return err;
965
966 if (cmd == SIOCGIFCONF) {
967 struct ifconf ifc;
968 if (copy_from_user(&ifc, argp, sizeof(struct ifconf)))
969 return -EFAULT;
970 rtnl_lock();
971 err = dev_ifconf(net, &ifc, sizeof(struct ifreq));
972 rtnl_unlock();
973 if (!err && copy_to_user(argp, &ifc, sizeof(struct ifconf)))
974 err = -EFAULT;
975 } else {
976 struct ifreq ifr;
977 bool need_copyout;
978 if (copy_from_user(&ifr, argp, sizeof(struct ifreq)))
979 return -EFAULT;
980 err = dev_ioctl(net, cmd, &ifr, &need_copyout);
981 if (!err && need_copyout)
982 if (copy_to_user(argp, &ifr, sizeof(struct ifreq)))
983 return -EFAULT;
984 }
985 return err;
986}
987
988
989
990
991
992
993struct ns_common *get_net_ns(struct ns_common *ns)
994{
995 return &get_net(container_of(ns, struct net, ns))->ns;
996}
997EXPORT_SYMBOL_GPL(get_net_ns);
998
999static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg)
1000{
1001 struct socket *sock;
1002 struct sock *sk;
1003 void __user *argp = (void __user *)arg;
1004 int pid, err;
1005 struct net *net;
1006
1007 sock = file->private_data;
1008 sk = sock->sk;
1009 net = sock_net(sk);
1010 if (unlikely(cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15))) {
1011 struct ifreq ifr;
1012 bool need_copyout;
1013 if (copy_from_user(&ifr, argp, sizeof(struct ifreq)))
1014 return -EFAULT;
1015 err = dev_ioctl(net, cmd, &ifr, &need_copyout);
1016 if (!err && need_copyout)
1017 if (copy_to_user(argp, &ifr, sizeof(struct ifreq)))
1018 return -EFAULT;
1019 } else
1020#ifdef CONFIG_WEXT_CORE
1021 if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) {
1022 err = wext_handle_ioctl(net, cmd, argp);
1023 } else
1024#endif
1025 switch (cmd) {
1026 case FIOSETOWN:
1027 case SIOCSPGRP:
1028 err = -EFAULT;
1029 if (get_user(pid, (int __user *)argp))
1030 break;
1031 err = f_setown(sock->file, pid, 1);
1032 break;
1033 case FIOGETOWN:
1034 case SIOCGPGRP:
1035 err = put_user(f_getown(sock->file),
1036 (int __user *)argp);
1037 break;
1038 case SIOCGIFBR:
1039 case SIOCSIFBR:
1040 case SIOCBRADDBR:
1041 case SIOCBRDELBR:
1042 err = -ENOPKG;
1043 if (!br_ioctl_hook)
1044 request_module("bridge");
1045
1046 mutex_lock(&br_ioctl_mutex);
1047 if (br_ioctl_hook)
1048 err = br_ioctl_hook(net, cmd, argp);
1049 mutex_unlock(&br_ioctl_mutex);
1050 break;
1051 case SIOCGIFVLAN:
1052 case SIOCSIFVLAN:
1053 err = -ENOPKG;
1054 if (!vlan_ioctl_hook)
1055 request_module("8021q");
1056
1057 mutex_lock(&vlan_ioctl_mutex);
1058 if (vlan_ioctl_hook)
1059 err = vlan_ioctl_hook(net, argp);
1060 mutex_unlock(&vlan_ioctl_mutex);
1061 break;
1062 case SIOCADDDLCI:
1063 case SIOCDELDLCI:
1064 err = -ENOPKG;
1065 if (!dlci_ioctl_hook)
1066 request_module("dlci");
1067
1068 mutex_lock(&dlci_ioctl_mutex);
1069 if (dlci_ioctl_hook)
1070 err = dlci_ioctl_hook(cmd, argp);
1071 mutex_unlock(&dlci_ioctl_mutex);
1072 break;
1073 case SIOCGSKNS:
1074 err = -EPERM;
1075 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
1076 break;
1077
1078 err = open_related_ns(&net->ns, get_net_ns);
1079 break;
1080 default:
1081 err = sock_do_ioctl(net, sock, cmd, arg);
1082 break;
1083 }
1084 return err;
1085}
1086
1087int sock_create_lite(int family, int type, int protocol, struct socket **res)
1088{
1089 int err;
1090 struct socket *sock = NULL;
1091
1092 err = security_socket_create(family, type, protocol, 1);
1093 if (err)
1094 goto out;
1095
1096 sock = sock_alloc();
1097 if (!sock) {
1098 err = -ENOMEM;
1099 goto out;
1100 }
1101
1102 sock->type = type;
1103 err = security_socket_post_create(sock, family, type, protocol, 1);
1104 if (err)
1105 goto out_release;
1106
1107out:
1108 *res = sock;
1109 return err;
1110out_release:
1111 sock_release(sock);
1112 sock = NULL;
1113 goto out;
1114}
1115EXPORT_SYMBOL(sock_create_lite);
1116
1117
1118static __poll_t sock_poll(struct file *file, poll_table *wait)
1119{
1120 __poll_t busy_flag = 0;
1121 struct socket *sock;
1122
1123
1124
1125
1126 sock = file->private_data;
1127
1128 if (sk_can_busy_loop(sock->sk)) {
1129
1130 busy_flag = POLL_BUSY_LOOP;
1131
1132
1133 if (wait && (wait->_key & POLL_BUSY_LOOP))
1134 sk_busy_loop(sock->sk, 1);
1135 }
1136
1137 return busy_flag | sock->ops->poll(file, sock, wait);
1138}
1139
1140static int sock_mmap(struct file *file, struct vm_area_struct *vma)
1141{
1142 struct socket *sock = file->private_data;
1143
1144 return sock->ops->mmap(file, sock, vma);
1145}
1146
1147static int sock_close(struct inode *inode, struct file *filp)
1148{
1149 sock_release(SOCKET_I(inode));
1150 return 0;
1151}
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164static int sock_fasync(int fd, struct file *filp, int on)
1165{
1166 struct socket *sock = filp->private_data;
1167 struct sock *sk = sock->sk;
1168 struct socket_wq *wq;
1169
1170 if (sk == NULL)
1171 return -EINVAL;
1172
1173 lock_sock(sk);
1174 wq = rcu_dereference_protected(sock->wq, lockdep_sock_is_held(sk));
1175 fasync_helper(fd, filp, on, &wq->fasync_list);
1176
1177 if (!wq->fasync_list)
1178 sock_reset_flag(sk, SOCK_FASYNC);
1179 else
1180 sock_set_flag(sk, SOCK_FASYNC);
1181
1182 release_sock(sk);
1183 return 0;
1184}
1185
1186
1187
1188int sock_wake_async(struct socket_wq *wq, int how, int band)
1189{
1190 if (!wq || !wq->fasync_list)
1191 return -1;
1192
1193 switch (how) {
1194 case SOCK_WAKE_WAITD:
1195 if (test_bit(SOCKWQ_ASYNC_WAITDATA, &wq->flags))
1196 break;
1197 goto call_kill;
1198 case SOCK_WAKE_SPACE:
1199 if (!test_and_clear_bit(SOCKWQ_ASYNC_NOSPACE, &wq->flags))
1200 break;
1201
1202 case SOCK_WAKE_IO:
1203call_kill:
1204 kill_fasync(&wq->fasync_list, SIGIO, band);
1205 break;
1206 case SOCK_WAKE_URG:
1207 kill_fasync(&wq->fasync_list, SIGURG, band);
1208 }
1209
1210 return 0;
1211}
1212EXPORT_SYMBOL(sock_wake_async);
1213
1214int __sock_create(struct net *net, int family, int type, int protocol,
1215 struct socket **res, int kern)
1216{
1217 int err;
1218 struct socket *sock;
1219 const struct net_proto_family *pf;
1220
1221
1222
1223
1224 if (family < 0 || family >= NPROTO)
1225 return -EAFNOSUPPORT;
1226 if (type < 0 || type >= SOCK_MAX)
1227 return -EINVAL;
1228
1229
1230
1231
1232
1233
1234 if (family == PF_INET && type == SOCK_PACKET) {
1235 pr_info_once("%s uses obsolete (PF_INET,SOCK_PACKET)\n",
1236 current->comm);
1237 family = PF_PACKET;
1238 }
1239
1240 err = security_socket_create(family, type, protocol, kern);
1241 if (err)
1242 return err;
1243
1244
1245
1246
1247
1248
1249 sock = sock_alloc();
1250 if (!sock) {
1251 net_warn_ratelimited("socket: no more sockets\n");
1252 return -ENFILE;
1253
1254 }
1255
1256 sock->type = type;
1257
1258#ifdef CONFIG_MODULES
1259
1260
1261
1262
1263
1264
1265 if (rcu_access_pointer(net_families[family]) == NULL)
1266 request_module("net-pf-%d", family);
1267#endif
1268
1269 rcu_read_lock();
1270 pf = rcu_dereference(net_families[family]);
1271 err = -EAFNOSUPPORT;
1272 if (!pf)
1273 goto out_release;
1274
1275
1276
1277
1278
1279 if (!try_module_get(pf->owner))
1280 goto out_release;
1281
1282
1283 rcu_read_unlock();
1284
1285 err = pf->create(net, sock, protocol, kern);
1286 if (err < 0)
1287 goto out_module_put;
1288
1289
1290
1291
1292
1293 if (!try_module_get(sock->ops->owner))
1294 goto out_module_busy;
1295
1296
1297
1298
1299
1300 module_put(pf->owner);
1301 err = security_socket_post_create(sock, family, type, protocol, kern);
1302 if (err)
1303 goto out_sock_release;
1304 *res = sock;
1305
1306 return 0;
1307
1308out_module_busy:
1309 err = -EAFNOSUPPORT;
1310out_module_put:
1311 sock->ops = NULL;
1312 module_put(pf->owner);
1313out_sock_release:
1314 sock_release(sock);
1315 return err;
1316
1317out_release:
1318 rcu_read_unlock();
1319 goto out_sock_release;
1320}
1321EXPORT_SYMBOL(__sock_create);
1322
1323int sock_create(int family, int type, int protocol, struct socket **res)
1324{
1325 return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0);
1326}
1327EXPORT_SYMBOL(sock_create);
1328
1329int sock_create_kern(struct net *net, int family, int type, int protocol, struct socket **res)
1330{
1331 return __sock_create(net, family, type, protocol, res, 1);
1332}
1333EXPORT_SYMBOL(sock_create_kern);
1334
1335int __sys_socket(int family, int type, int protocol)
1336{
1337 int retval;
1338 struct socket *sock;
1339 int flags;
1340
1341
1342 BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC);
1343 BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK);
1344 BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK);
1345 BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK);
1346
1347 flags = type & ~SOCK_TYPE_MASK;
1348 if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
1349 return -EINVAL;
1350 type &= SOCK_TYPE_MASK;
1351
1352 if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK))
1353 flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;
1354
1355 retval = sock_create(family, type, protocol, &sock);
1356 if (retval < 0)
1357 return retval;
1358
1359 return sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK));
1360}
1361
1362SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol)
1363{
1364 return __sys_socket(family, type, protocol);
1365}
1366
1367
1368
1369
1370
1371int __sys_socketpair(int family, int type, int protocol, int __user *usockvec)
1372{
1373 struct socket *sock1, *sock2;
1374 int fd1, fd2, err;
1375 struct file *newfile1, *newfile2;
1376 int flags;
1377
1378 flags = type & ~SOCK_TYPE_MASK;
1379 if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
1380 return -EINVAL;
1381 type &= SOCK_TYPE_MASK;
1382
1383 if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK))
1384 flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;
1385
1386
1387
1388
1389
1390 fd1 = get_unused_fd_flags(flags);
1391 if (unlikely(fd1 < 0))
1392 return fd1;
1393
1394 fd2 = get_unused_fd_flags(flags);
1395 if (unlikely(fd2 < 0)) {
1396 put_unused_fd(fd1);
1397 return fd2;
1398 }
1399
1400 err = put_user(fd1, &usockvec[0]);
1401 if (err)
1402 goto out;
1403
1404 err = put_user(fd2, &usockvec[1]);
1405 if (err)
1406 goto out;
1407
1408
1409
1410
1411
1412
1413 err = sock_create(family, type, protocol, &sock1);
1414 if (unlikely(err < 0))
1415 goto out;
1416
1417 err = sock_create(family, type, protocol, &sock2);
1418 if (unlikely(err < 0)) {
1419 sock_release(sock1);
1420 goto out;
1421 }
1422
1423 err = sock1->ops->socketpair(sock1, sock2);
1424 if (unlikely(err < 0)) {
1425 sock_release(sock2);
1426 sock_release(sock1);
1427 goto out;
1428 }
1429
1430 newfile1 = sock_alloc_file(sock1, flags, NULL);
1431 if (IS_ERR(newfile1)) {
1432 err = PTR_ERR(newfile1);
1433 sock_release(sock2);
1434 goto out;
1435 }
1436
1437 newfile2 = sock_alloc_file(sock2, flags, NULL);
1438 if (IS_ERR(newfile2)) {
1439 err = PTR_ERR(newfile2);
1440 fput(newfile1);
1441 goto out;
1442 }
1443
1444 audit_fd_pair(fd1, fd2);
1445
1446 fd_install(fd1, newfile1);
1447 fd_install(fd2, newfile2);
1448 return 0;
1449
1450out:
1451 put_unused_fd(fd2);
1452 put_unused_fd(fd1);
1453 return err;
1454}
1455
1456SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol,
1457 int __user *, usockvec)
1458{
1459 return __sys_socketpair(family, type, protocol, usockvec);
1460}
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470int __sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen)
1471{
1472 struct socket *sock;
1473 struct sockaddr_storage address;
1474 int err, fput_needed;
1475
1476 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1477 if (sock) {
1478 err = move_addr_to_kernel(umyaddr, addrlen, &address);
1479 if (err >= 0) {
1480 err = security_socket_bind(sock,
1481 (struct sockaddr *)&address,
1482 addrlen);
1483 if (!err)
1484 err = sock->ops->bind(sock,
1485 (struct sockaddr *)
1486 &address, addrlen);
1487 }
1488 fput_light(sock->file, fput_needed);
1489 }
1490 return err;
1491}
1492
1493SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen)
1494{
1495 return __sys_bind(fd, umyaddr, addrlen);
1496}
1497
1498
1499
1500
1501
1502
1503
1504int __sys_listen(int fd, int backlog)
1505{
1506 struct socket *sock;
1507 int err, fput_needed;
1508 int somaxconn;
1509
1510 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1511 if (sock) {
1512 somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn;
1513 if ((unsigned int)backlog > somaxconn)
1514 backlog = somaxconn;
1515
1516 err = security_socket_listen(sock, backlog);
1517 if (!err)
1518 err = sock->ops->listen(sock, backlog);
1519
1520 fput_light(sock->file, fput_needed);
1521 }
1522 return err;
1523}
1524
1525SYSCALL_DEFINE2(listen, int, fd, int, backlog)
1526{
1527 return __sys_listen(fd, backlog);
1528}
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542int __sys_accept4(int fd, struct sockaddr __user *upeer_sockaddr,
1543 int __user *upeer_addrlen, int flags)
1544{
1545 struct socket *sock, *newsock;
1546 struct file *newfile;
1547 int err, len, newfd, fput_needed;
1548 struct sockaddr_storage address;
1549
1550 if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
1551 return -EINVAL;
1552
1553 if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK))
1554 flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;
1555
1556 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1557 if (!sock)
1558 goto out;
1559
1560 err = -ENFILE;
1561 newsock = sock_alloc();
1562 if (!newsock)
1563 goto out_put;
1564
1565 newsock->type = sock->type;
1566 newsock->ops = sock->ops;
1567
1568
1569
1570
1571
1572 __module_get(newsock->ops->owner);
1573
1574 newfd = get_unused_fd_flags(flags);
1575 if (unlikely(newfd < 0)) {
1576 err = newfd;
1577 sock_release(newsock);
1578 goto out_put;
1579 }
1580 newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name);
1581 if (IS_ERR(newfile)) {
1582 err = PTR_ERR(newfile);
1583 put_unused_fd(newfd);
1584 goto out_put;
1585 }
1586
1587 err = security_socket_accept(sock, newsock);
1588 if (err)
1589 goto out_fd;
1590
1591 err = sock->ops->accept(sock, newsock, sock->file->f_flags, false);
1592 if (err < 0)
1593 goto out_fd;
1594
1595 if (upeer_sockaddr) {
1596 len = newsock->ops->getname(newsock,
1597 (struct sockaddr *)&address, 2);
1598 if (len < 0) {
1599 err = -ECONNABORTED;
1600 goto out_fd;
1601 }
1602 err = move_addr_to_user(&address,
1603 len, upeer_sockaddr, upeer_addrlen);
1604 if (err < 0)
1605 goto out_fd;
1606 }
1607
1608
1609
1610 fd_install(newfd, newfile);
1611 err = newfd;
1612
1613out_put:
1614 fput_light(sock->file, fput_needed);
1615out:
1616 return err;
1617out_fd:
1618 fput(newfile);
1619 put_unused_fd(newfd);
1620 goto out_put;
1621}
1622
1623SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr,
1624 int __user *, upeer_addrlen, int, flags)
1625{
1626 return __sys_accept4(fd, upeer_sockaddr, upeer_addrlen, flags);
1627}
1628
1629SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr,
1630 int __user *, upeer_addrlen)
1631{
1632 return __sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0);
1633}
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647int __sys_connect(int fd, struct sockaddr __user *uservaddr, int addrlen)
1648{
1649 struct socket *sock;
1650 struct sockaddr_storage address;
1651 int err, fput_needed;
1652
1653 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1654 if (!sock)
1655 goto out;
1656 err = move_addr_to_kernel(uservaddr, addrlen, &address);
1657 if (err < 0)
1658 goto out_put;
1659
1660 err =
1661 security_socket_connect(sock, (struct sockaddr *)&address, addrlen);
1662 if (err)
1663 goto out_put;
1664
1665 err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen,
1666 sock->file->f_flags);
1667out_put:
1668 fput_light(sock->file, fput_needed);
1669out:
1670 return err;
1671}
1672
1673SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr,
1674 int, addrlen)
1675{
1676 return __sys_connect(fd, uservaddr, addrlen);
1677}
1678
1679
1680
1681
1682
1683
1684int __sys_getsockname(int fd, struct sockaddr __user *usockaddr,
1685 int __user *usockaddr_len)
1686{
1687 struct socket *sock;
1688 struct sockaddr_storage address;
1689 int err, fput_needed;
1690
1691 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1692 if (!sock)
1693 goto out;
1694
1695 err = security_socket_getsockname(sock);
1696 if (err)
1697 goto out_put;
1698
1699 err = sock->ops->getname(sock, (struct sockaddr *)&address, 0);
1700 if (err < 0)
1701 goto out_put;
1702
1703 err = move_addr_to_user(&address, err, usockaddr, usockaddr_len);
1704
1705out_put:
1706 fput_light(sock->file, fput_needed);
1707out:
1708 return err;
1709}
1710
1711SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr,
1712 int __user *, usockaddr_len)
1713{
1714 return __sys_getsockname(fd, usockaddr, usockaddr_len);
1715}
1716
1717
1718
1719
1720
1721
1722int __sys_getpeername(int fd, struct sockaddr __user *usockaddr,
1723 int __user *usockaddr_len)
1724{
1725 struct socket *sock;
1726 struct sockaddr_storage address;
1727 int err, fput_needed;
1728
1729 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1730 if (sock != NULL) {
1731 err = security_socket_getpeername(sock);
1732 if (err) {
1733 fput_light(sock->file, fput_needed);
1734 return err;
1735 }
1736
1737 err = sock->ops->getname(sock, (struct sockaddr *)&address, 1);
1738 if (err >= 0)
1739
1740 err = move_addr_to_user(&address, err, usockaddr,
1741 usockaddr_len);
1742 fput_light(sock->file, fput_needed);
1743 }
1744 return err;
1745}
1746
1747SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr,
1748 int __user *, usockaddr_len)
1749{
1750 return __sys_getpeername(fd, usockaddr, usockaddr_len);
1751}
1752
1753
1754
1755
1756
1757
1758int __sys_sendto(int fd, void __user *buff, size_t len, unsigned int flags,
1759 struct sockaddr __user *addr, int addr_len)
1760{
1761 struct socket *sock;
1762 struct sockaddr_storage address;
1763 int err;
1764 struct msghdr msg;
1765 struct iovec iov;
1766 int fput_needed;
1767
1768 err = import_single_range(WRITE, buff, len, &iov, &msg.msg_iter);
1769 if (unlikely(err))
1770 return err;
1771 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1772 if (!sock)
1773 goto out;
1774
1775 msg.msg_name = NULL;
1776 msg.msg_control = NULL;
1777 msg.msg_controllen = 0;
1778 msg.msg_namelen = 0;
1779 if (addr) {
1780 err = move_addr_to_kernel(addr, addr_len, &address);
1781 if (err < 0)
1782 goto out_put;
1783 msg.msg_name = (struct sockaddr *)&address;
1784 msg.msg_namelen = addr_len;
1785 }
1786 if (sock->file->f_flags & O_NONBLOCK)
1787 flags |= MSG_DONTWAIT;
1788 msg.msg_flags = flags;
1789 err = sock_sendmsg(sock, &msg);
1790
1791out_put:
1792 fput_light(sock->file, fput_needed);
1793out:
1794 return err;
1795}
1796
1797SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len,
1798 unsigned int, flags, struct sockaddr __user *, addr,
1799 int, addr_len)
1800{
1801 return __sys_sendto(fd, buff, len, flags, addr, addr_len);
1802}
1803
1804
1805
1806
1807
1808SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len,
1809 unsigned int, flags)
1810{
1811 return __sys_sendto(fd, buff, len, flags, NULL, 0);
1812}
1813
1814
1815
1816
1817
1818
1819int __sys_recvfrom(int fd, void __user *ubuf, size_t size, unsigned int flags,
1820 struct sockaddr __user *addr, int __user *addr_len)
1821{
1822 struct socket *sock;
1823 struct iovec iov;
1824 struct msghdr msg;
1825 struct sockaddr_storage address;
1826 int err, err2;
1827 int fput_needed;
1828
1829 err = import_single_range(READ, ubuf, size, &iov, &msg.msg_iter);
1830 if (unlikely(err))
1831 return err;
1832 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1833 if (!sock)
1834 goto out;
1835
1836 msg.msg_control = NULL;
1837 msg.msg_controllen = 0;
1838
1839 msg.msg_name = addr ? (struct sockaddr *)&address : NULL;
1840
1841 msg.msg_namelen = 0;
1842 msg.msg_iocb = NULL;
1843 msg.msg_flags = 0;
1844 if (sock->file->f_flags & O_NONBLOCK)
1845 flags |= MSG_DONTWAIT;
1846 err = sock_recvmsg(sock, &msg, flags);
1847
1848 if (err >= 0 && addr != NULL) {
1849 err2 = move_addr_to_user(&address,
1850 msg.msg_namelen, addr, addr_len);
1851 if (err2 < 0)
1852 err = err2;
1853 }
1854
1855 fput_light(sock->file, fput_needed);
1856out:
1857 return err;
1858}
1859
1860SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
1861 unsigned int, flags, struct sockaddr __user *, addr,
1862 int __user *, addr_len)
1863{
1864 return __sys_recvfrom(fd, ubuf, size, flags, addr, addr_len);
1865}
1866
1867
1868
1869
1870
1871SYSCALL_DEFINE4(recv, int, fd, void __user *, ubuf, size_t, size,
1872 unsigned int, flags)
1873{
1874 return __sys_recvfrom(fd, ubuf, size, flags, NULL, NULL);
1875}
1876
1877
1878
1879
1880
1881
1882static int __sys_setsockopt(int fd, int level, int optname,
1883 char __user *optval, int optlen)
1884{
1885 int err, fput_needed;
1886 struct socket *sock;
1887
1888 if (optlen < 0)
1889 return -EINVAL;
1890
1891 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1892 if (sock != NULL) {
1893 err = security_socket_setsockopt(sock, level, optname);
1894 if (err)
1895 goto out_put;
1896
1897 if (level == SOL_SOCKET)
1898 err =
1899 sock_setsockopt(sock, level, optname, optval,
1900 optlen);
1901 else
1902 err =
1903 sock->ops->setsockopt(sock, level, optname, optval,
1904 optlen);
1905out_put:
1906 fput_light(sock->file, fput_needed);
1907 }
1908 return err;
1909}
1910
1911SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname,
1912 char __user *, optval, int, optlen)
1913{
1914 return __sys_setsockopt(fd, level, optname, optval, optlen);
1915}
1916
1917
1918
1919
1920
1921
1922static int __sys_getsockopt(int fd, int level, int optname,
1923 char __user *optval, int __user *optlen)
1924{
1925 int err, fput_needed;
1926 struct socket *sock;
1927
1928 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1929 if (sock != NULL) {
1930 err = security_socket_getsockopt(sock, level, optname);
1931 if (err)
1932 goto out_put;
1933
1934 if (level == SOL_SOCKET)
1935 err =
1936 sock_getsockopt(sock, level, optname, optval,
1937 optlen);
1938 else
1939 err =
1940 sock->ops->getsockopt(sock, level, optname, optval,
1941 optlen);
1942out_put:
1943 fput_light(sock->file, fput_needed);
1944 }
1945 return err;
1946}
1947
1948SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
1949 char __user *, optval, int __user *, optlen)
1950{
1951 return __sys_getsockopt(fd, level, optname, optval, optlen);
1952}
1953
1954
1955
1956
1957
1958int __sys_shutdown(int fd, int how)
1959{
1960 int err, fput_needed;
1961 struct socket *sock;
1962
1963 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1964 if (sock != NULL) {
1965 err = security_socket_shutdown(sock, how);
1966 if (!err)
1967 err = sock->ops->shutdown(sock, how);
1968 fput_light(sock->file, fput_needed);
1969 }
1970 return err;
1971}
1972
1973SYSCALL_DEFINE2(shutdown, int, fd, int, how)
1974{
1975 return __sys_shutdown(fd, how);
1976}
1977
1978
1979
1980
1981#define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member)
1982#define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen)
1983#define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags)
1984
1985struct used_address {
1986 struct sockaddr_storage name;
1987 unsigned int name_len;
1988};
1989
1990static int copy_msghdr_from_user(struct msghdr *kmsg,
1991 struct user_msghdr __user *umsg,
1992 struct sockaddr __user **save_addr,
1993 struct iovec **iov)
1994{
1995 struct user_msghdr msg;
1996 ssize_t err;
1997
1998 if (copy_from_user(&msg, umsg, sizeof(*umsg)))
1999 return -EFAULT;
2000
2001 kmsg->msg_control = (void __force *)msg.msg_control;
2002 kmsg->msg_controllen = msg.msg_controllen;
2003 kmsg->msg_flags = msg.msg_flags;
2004
2005 kmsg->msg_namelen = msg.msg_namelen;
2006 if (!msg.msg_name)
2007 kmsg->msg_namelen = 0;
2008
2009 if (kmsg->msg_namelen < 0)
2010 return -EINVAL;
2011
2012 if (kmsg->msg_namelen > sizeof(struct sockaddr_storage))
2013 kmsg->msg_namelen = sizeof(struct sockaddr_storage);
2014
2015 if (save_addr)
2016 *save_addr = msg.msg_name;
2017
2018 if (msg.msg_name && kmsg->msg_namelen) {
2019 if (!save_addr) {
2020 err = move_addr_to_kernel(msg.msg_name,
2021 kmsg->msg_namelen,
2022 kmsg->msg_name);
2023 if (err < 0)
2024 return err;
2025 }
2026 } else {
2027 kmsg->msg_name = NULL;
2028 kmsg->msg_namelen = 0;
2029 }
2030
2031 if (msg.msg_iovlen > UIO_MAXIOV)
2032 return -EMSGSIZE;
2033
2034 kmsg->msg_iocb = NULL;
2035
2036 return import_iovec(save_addr ? READ : WRITE,
2037 msg.msg_iov, msg.msg_iovlen,
2038 UIO_FASTIOV, iov, &kmsg->msg_iter);
2039}
2040
2041static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg,
2042 struct msghdr *msg_sys, unsigned int flags,
2043 struct used_address *used_address,
2044 unsigned int allowed_msghdr_flags)
2045{
2046 struct compat_msghdr __user *msg_compat =
2047 (struct compat_msghdr __user *)msg;
2048 struct sockaddr_storage address;
2049 struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
2050 unsigned char ctl[sizeof(struct cmsghdr) + 20]
2051 __aligned(sizeof(__kernel_size_t));
2052
2053 unsigned char *ctl_buf = ctl;
2054 int ctl_len;
2055 ssize_t err;
2056
2057 msg_sys->msg_name = &address;
2058
2059 if (MSG_CMSG_COMPAT & flags)
2060 err = get_compat_msghdr(msg_sys, msg_compat, NULL, &iov);
2061 else
2062 err = copy_msghdr_from_user(msg_sys, msg, NULL, &iov);
2063 if (err < 0)
2064 return err;
2065
2066 err = -ENOBUFS;
2067
2068 if (msg_sys->msg_controllen > INT_MAX)
2069 goto out_freeiov;
2070 flags |= (msg_sys->msg_flags & allowed_msghdr_flags);
2071 ctl_len = msg_sys->msg_controllen;
2072 if ((MSG_CMSG_COMPAT & flags) && ctl_len) {
2073 err =
2074 cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl,
2075 sizeof(ctl));
2076 if (err)
2077 goto out_freeiov;
2078 ctl_buf = msg_sys->msg_control;
2079 ctl_len = msg_sys->msg_controllen;
2080 } else if (ctl_len) {
2081 BUILD_BUG_ON(sizeof(struct cmsghdr) !=
2082 CMSG_ALIGN(sizeof(struct cmsghdr)));
2083 if (ctl_len > sizeof(ctl)) {
2084 ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL);
2085 if (ctl_buf == NULL)
2086 goto out_freeiov;
2087 }
2088 err = -EFAULT;
2089
2090
2091
2092
2093
2094 if (copy_from_user(ctl_buf,
2095 (void __user __force *)msg_sys->msg_control,
2096 ctl_len))
2097 goto out_freectl;
2098 msg_sys->msg_control = ctl_buf;
2099 }
2100 msg_sys->msg_flags = flags;
2101
2102 if (sock->file->f_flags & O_NONBLOCK)
2103 msg_sys->msg_flags |= MSG_DONTWAIT;
2104
2105
2106
2107
2108
2109
2110 if (used_address && msg_sys->msg_name &&
2111 used_address->name_len == msg_sys->msg_namelen &&
2112 !memcmp(&used_address->name, msg_sys->msg_name,
2113 used_address->name_len)) {
2114 err = sock_sendmsg_nosec(sock, msg_sys);
2115 goto out_freectl;
2116 }
2117 err = sock_sendmsg(sock, msg_sys);
2118
2119
2120
2121
2122 if (used_address && err >= 0) {
2123 used_address->name_len = msg_sys->msg_namelen;
2124 if (msg_sys->msg_name)
2125 memcpy(&used_address->name, msg_sys->msg_name,
2126 used_address->name_len);
2127 }
2128
2129out_freectl:
2130 if (ctl_buf != ctl)
2131 sock_kfree_s(sock->sk, ctl_buf, ctl_len);
2132out_freeiov:
2133 kfree(iov);
2134 return err;
2135}
2136
2137
2138
2139
2140
2141long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned int flags,
2142 bool forbid_cmsg_compat)
2143{
2144 int fput_needed, err;
2145 struct msghdr msg_sys;
2146 struct socket *sock;
2147
2148 if (forbid_cmsg_compat && (flags & MSG_CMSG_COMPAT))
2149 return -EINVAL;
2150
2151 sock = sockfd_lookup_light(fd, &err, &fput_needed);
2152 if (!sock)
2153 goto out;
2154
2155 err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL, 0);
2156
2157 fput_light(sock->file, fput_needed);
2158out:
2159 return err;
2160}
2161
2162SYSCALL_DEFINE3(sendmsg, int, fd, struct user_msghdr __user *, msg, unsigned int, flags)
2163{
2164 return __sys_sendmsg(fd, msg, flags, true);
2165}
2166
2167
2168
2169
2170
2171int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
2172 unsigned int flags, bool forbid_cmsg_compat)
2173{
2174 int fput_needed, err, datagrams;
2175 struct socket *sock;
2176 struct mmsghdr __user *entry;
2177 struct compat_mmsghdr __user *compat_entry;
2178 struct msghdr msg_sys;
2179 struct used_address used_address;
2180 unsigned int oflags = flags;
2181
2182 if (forbid_cmsg_compat && (flags & MSG_CMSG_COMPAT))
2183 return -EINVAL;
2184
2185 if (vlen > UIO_MAXIOV)
2186 vlen = UIO_MAXIOV;
2187
2188 datagrams = 0;
2189
2190 sock = sockfd_lookup_light(fd, &err, &fput_needed);
2191 if (!sock)
2192 return err;
2193
2194 used_address.name_len = UINT_MAX;
2195 entry = mmsg;
2196 compat_entry = (struct compat_mmsghdr __user *)mmsg;
2197 err = 0;
2198 flags |= MSG_BATCH;
2199
2200 while (datagrams < vlen) {
2201 if (datagrams == vlen - 1)
2202 flags = oflags;
2203
2204 if (MSG_CMSG_COMPAT & flags) {
2205 err = ___sys_sendmsg(sock, (struct user_msghdr __user *)compat_entry,
2206 &msg_sys, flags, &used_address, MSG_EOR);
2207 if (err < 0)
2208 break;
2209 err = __put_user(err, &compat_entry->msg_len);
2210 ++compat_entry;
2211 } else {
2212 err = ___sys_sendmsg(sock,
2213 (struct user_msghdr __user *)entry,
2214 &msg_sys, flags, &used_address, MSG_EOR);
2215 if (err < 0)
2216 break;
2217 err = put_user(err, &entry->msg_len);
2218 ++entry;
2219 }
2220
2221 if (err)
2222 break;
2223 ++datagrams;
2224 if (msg_data_left(&msg_sys))
2225 break;
2226 cond_resched();
2227 }
2228
2229 fput_light(sock->file, fput_needed);
2230
2231
2232 if (datagrams != 0)
2233 return datagrams;
2234
2235 return err;
2236}
2237
2238SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg,
2239 unsigned int, vlen, unsigned int, flags)
2240{
2241 return __sys_sendmmsg(fd, mmsg, vlen, flags, true);
2242}
2243
2244static int ___sys_recvmsg(struct socket *sock, struct user_msghdr __user *msg,
2245 struct msghdr *msg_sys, unsigned int flags, int nosec)
2246{
2247 struct compat_msghdr __user *msg_compat =
2248 (struct compat_msghdr __user *)msg;
2249 struct iovec iovstack[UIO_FASTIOV];
2250 struct iovec *iov = iovstack;
2251 unsigned long cmsg_ptr;
2252 int len;
2253 ssize_t err;
2254
2255
2256 struct sockaddr_storage addr;
2257
2258
2259 struct sockaddr __user *uaddr;
2260 int __user *uaddr_len = COMPAT_NAMELEN(msg);
2261
2262 msg_sys->msg_name = &addr;
2263
2264 if (MSG_CMSG_COMPAT & flags)
2265 err = get_compat_msghdr(msg_sys, msg_compat, &uaddr, &iov);
2266 else
2267 err = copy_msghdr_from_user(msg_sys, msg, &uaddr, &iov);
2268 if (err < 0)
2269 return err;
2270
2271 cmsg_ptr = (unsigned long)msg_sys->msg_control;
2272 msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT);
2273
2274
2275 msg_sys->msg_namelen = 0;
2276
2277 if (sock->file->f_flags & O_NONBLOCK)
2278 flags |= MSG_DONTWAIT;
2279 err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, flags);
2280 if (err < 0)
2281 goto out_freeiov;
2282 len = err;
2283
2284 if (uaddr != NULL) {
2285 err = move_addr_to_user(&addr,
2286 msg_sys->msg_namelen, uaddr,
2287 uaddr_len);
2288 if (err < 0)
2289 goto out_freeiov;
2290 }
2291 err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT),
2292 COMPAT_FLAGS(msg));
2293 if (err)
2294 goto out_freeiov;
2295 if (MSG_CMSG_COMPAT & flags)
2296 err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
2297 &msg_compat->msg_controllen);
2298 else
2299 err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
2300 &msg->msg_controllen);
2301 if (err)
2302 goto out_freeiov;
2303 err = len;
2304
2305out_freeiov:
2306 kfree(iov);
2307 return err;
2308}
2309
2310
2311
2312
2313
2314long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned int flags,
2315 bool forbid_cmsg_compat)
2316{
2317 int fput_needed, err;
2318 struct msghdr msg_sys;
2319 struct socket *sock;
2320
2321 if (forbid_cmsg_compat && (flags & MSG_CMSG_COMPAT))
2322 return -EINVAL;
2323
2324 sock = sockfd_lookup_light(fd, &err, &fput_needed);
2325 if (!sock)
2326 goto out;
2327
2328 err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0);
2329
2330 fput_light(sock->file, fput_needed);
2331out:
2332 return err;
2333}
2334
2335SYSCALL_DEFINE3(recvmsg, int, fd, struct user_msghdr __user *, msg,
2336 unsigned int, flags)
2337{
2338 return __sys_recvmsg(fd, msg, flags, true);
2339}
2340
2341
2342
2343
2344
2345int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
2346 unsigned int flags, struct timespec *timeout)
2347{
2348 int fput_needed, err, datagrams;
2349 struct socket *sock;
2350 struct mmsghdr __user *entry;
2351 struct compat_mmsghdr __user *compat_entry;
2352 struct msghdr msg_sys;
2353 struct timespec64 end_time;
2354 struct timespec64 timeout64;
2355
2356 if (timeout &&
2357 poll_select_set_timeout(&end_time, timeout->tv_sec,
2358 timeout->tv_nsec))
2359 return -EINVAL;
2360
2361 datagrams = 0;
2362
2363 sock = sockfd_lookup_light(fd, &err, &fput_needed);
2364 if (!sock)
2365 return err;
2366
2367 if (likely(!(flags & MSG_ERRQUEUE))) {
2368 err = sock_error(sock->sk);
2369 if (err) {
2370 datagrams = err;
2371 goto out_put;
2372 }
2373 }
2374
2375 entry = mmsg;
2376 compat_entry = (struct compat_mmsghdr __user *)mmsg;
2377
2378 while (datagrams < vlen) {
2379
2380
2381
2382 if (MSG_CMSG_COMPAT & flags) {
2383 err = ___sys_recvmsg(sock, (struct user_msghdr __user *)compat_entry,
2384 &msg_sys, flags & ~MSG_WAITFORONE,
2385 datagrams);
2386 if (err < 0)
2387 break;
2388 err = __put_user(err, &compat_entry->msg_len);
2389 ++compat_entry;
2390 } else {
2391 err = ___sys_recvmsg(sock,
2392 (struct user_msghdr __user *)entry,
2393 &msg_sys, flags & ~MSG_WAITFORONE,
2394 datagrams);
2395 if (err < 0)
2396 break;
2397 err = put_user(err, &entry->msg_len);
2398 ++entry;
2399 }
2400
2401 if (err)
2402 break;
2403 ++datagrams;
2404
2405
2406 if (flags & MSG_WAITFORONE)
2407 flags |= MSG_DONTWAIT;
2408
2409 if (timeout) {
2410 ktime_get_ts64(&timeout64);
2411 *timeout = timespec64_to_timespec(
2412 timespec64_sub(end_time, timeout64));
2413 if (timeout->tv_sec < 0) {
2414 timeout->tv_sec = timeout->tv_nsec = 0;
2415 break;
2416 }
2417
2418
2419 if (timeout->tv_nsec == 0 && timeout->tv_sec == 0)
2420 break;
2421 }
2422
2423
2424 if (msg_sys.msg_flags & MSG_OOB)
2425 break;
2426 cond_resched();
2427 }
2428
2429 if (err == 0)
2430 goto out_put;
2431
2432 if (datagrams == 0) {
2433 datagrams = err;
2434 goto out_put;
2435 }
2436
2437
2438
2439
2440
2441 if (err != -EAGAIN) {
2442
2443
2444
2445
2446
2447
2448 sock->sk->sk_err = -err;
2449 }
2450out_put:
2451 fput_light(sock->file, fput_needed);
2452
2453 return datagrams;
2454}
2455
2456static int do_sys_recvmmsg(int fd, struct mmsghdr __user *mmsg,
2457 unsigned int vlen, unsigned int flags,
2458 struct timespec __user *timeout)
2459{
2460 int datagrams;
2461 struct timespec timeout_sys;
2462
2463 if (flags & MSG_CMSG_COMPAT)
2464 return -EINVAL;
2465
2466 if (!timeout)
2467 return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL);
2468
2469 if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys)))
2470 return -EFAULT;
2471
2472 datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys);
2473
2474 if (datagrams > 0 &&
2475 copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys)))
2476 datagrams = -EFAULT;
2477
2478 return datagrams;
2479}
2480
2481SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg,
2482 unsigned int, vlen, unsigned int, flags,
2483 struct timespec __user *, timeout)
2484{
2485 return do_sys_recvmmsg(fd, mmsg, vlen, flags, timeout);
2486}
2487
2488#ifdef __ARCH_WANT_SYS_SOCKETCALL
2489
2490#define AL(x) ((x) * sizeof(unsigned long))
2491static const unsigned char nargs[21] = {
2492 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
2493 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
2494 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
2495 AL(4), AL(5), AL(4)
2496};
2497
2498#undef AL
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args)
2509{
2510 unsigned long a[AUDITSC_ARGS];
2511 unsigned long a0, a1;
2512 int err;
2513 unsigned int len;
2514
2515 if (call < 1 || call > SYS_SENDMMSG)
2516 return -EINVAL;
2517
2518 len = nargs[call];
2519 if (len > sizeof(a))
2520 return -EINVAL;
2521
2522
2523 if (copy_from_user(a, args, len))
2524 return -EFAULT;
2525
2526 err = audit_socketcall(nargs[call] / sizeof(unsigned long), a);
2527 if (err)
2528 return err;
2529
2530 a0 = a[0];
2531 a1 = a[1];
2532
2533 switch (call) {
2534 case SYS_SOCKET:
2535 err = __sys_socket(a0, a1, a[2]);
2536 break;
2537 case SYS_BIND:
2538 err = __sys_bind(a0, (struct sockaddr __user *)a1, a[2]);
2539 break;
2540 case SYS_CONNECT:
2541 err = __sys_connect(a0, (struct sockaddr __user *)a1, a[2]);
2542 break;
2543 case SYS_LISTEN:
2544 err = __sys_listen(a0, a1);
2545 break;
2546 case SYS_ACCEPT:
2547 err = __sys_accept4(a0, (struct sockaddr __user *)a1,
2548 (int __user *)a[2], 0);
2549 break;
2550 case SYS_GETSOCKNAME:
2551 err =
2552 __sys_getsockname(a0, (struct sockaddr __user *)a1,
2553 (int __user *)a[2]);
2554 break;
2555 case SYS_GETPEERNAME:
2556 err =
2557 __sys_getpeername(a0, (struct sockaddr __user *)a1,
2558 (int __user *)a[2]);
2559 break;
2560 case SYS_SOCKETPAIR:
2561 err = __sys_socketpair(a0, a1, a[2], (int __user *)a[3]);
2562 break;
2563 case SYS_SEND:
2564 err = __sys_sendto(a0, (void __user *)a1, a[2], a[3],
2565 NULL, 0);
2566 break;
2567 case SYS_SENDTO:
2568 err = __sys_sendto(a0, (void __user *)a1, a[2], a[3],
2569 (struct sockaddr __user *)a[4], a[5]);
2570 break;
2571 case SYS_RECV:
2572 err = __sys_recvfrom(a0, (void __user *)a1, a[2], a[3],
2573 NULL, NULL);
2574 break;
2575 case SYS_RECVFROM:
2576 err = __sys_recvfrom(a0, (void __user *)a1, a[2], a[3],
2577 (struct sockaddr __user *)a[4],
2578 (int __user *)a[5]);
2579 break;
2580 case SYS_SHUTDOWN:
2581 err = __sys_shutdown(a0, a1);
2582 break;
2583 case SYS_SETSOCKOPT:
2584 err = __sys_setsockopt(a0, a1, a[2], (char __user *)a[3],
2585 a[4]);
2586 break;
2587 case SYS_GETSOCKOPT:
2588 err =
2589 __sys_getsockopt(a0, a1, a[2], (char __user *)a[3],
2590 (int __user *)a[4]);
2591 break;
2592 case SYS_SENDMSG:
2593 err = __sys_sendmsg(a0, (struct user_msghdr __user *)a1,
2594 a[2], true);
2595 break;
2596 case SYS_SENDMMSG:
2597 err = __sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2],
2598 a[3], true);
2599 break;
2600 case SYS_RECVMSG:
2601 err = __sys_recvmsg(a0, (struct user_msghdr __user *)a1,
2602 a[2], true);
2603 break;
2604 case SYS_RECVMMSG:
2605 err = do_sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2],
2606 a[3], (struct timespec __user *)a[4]);
2607 break;
2608 case SYS_ACCEPT4:
2609 err = __sys_accept4(a0, (struct sockaddr __user *)a1,
2610 (int __user *)a[2], a[3]);
2611 break;
2612 default:
2613 err = -EINVAL;
2614 break;
2615 }
2616 return err;
2617}
2618
2619#endif
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630int sock_register(const struct net_proto_family *ops)
2631{
2632 int err;
2633
2634 if (ops->family >= NPROTO) {
2635 pr_crit("protocol %d >= NPROTO(%d)\n", ops->family, NPROTO);
2636 return -ENOBUFS;
2637 }
2638
2639 spin_lock(&net_family_lock);
2640 if (rcu_dereference_protected(net_families[ops->family],
2641 lockdep_is_held(&net_family_lock)))
2642 err = -EEXIST;
2643 else {
2644 rcu_assign_pointer(net_families[ops->family], ops);
2645 err = 0;
2646 }
2647 spin_unlock(&net_family_lock);
2648
2649 pr_info("NET: Registered protocol family %d\n", ops->family);
2650 return err;
2651}
2652EXPORT_SYMBOL(sock_register);
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667void sock_unregister(int family)
2668{
2669 BUG_ON(family < 0 || family >= NPROTO);
2670
2671 spin_lock(&net_family_lock);
2672 RCU_INIT_POINTER(net_families[family], NULL);
2673 spin_unlock(&net_family_lock);
2674
2675 synchronize_rcu();
2676
2677 pr_info("NET: Unregistered protocol family %d\n", family);
2678}
2679EXPORT_SYMBOL(sock_unregister);
2680
2681bool sock_is_registered(int family)
2682{
2683 return family < NPROTO && rcu_access_pointer(net_families[family]);
2684}
2685
2686static int __init sock_init(void)
2687{
2688 int err;
2689
2690
2691
2692 err = net_sysctl_init();
2693 if (err)
2694 goto out;
2695
2696
2697
2698
2699 skb_init();
2700
2701
2702
2703
2704
2705 init_inodecache();
2706
2707 err = register_filesystem(&sock_fs_type);
2708 if (err)
2709 goto out_fs;
2710 sock_mnt = kern_mount(&sock_fs_type);
2711 if (IS_ERR(sock_mnt)) {
2712 err = PTR_ERR(sock_mnt);
2713 goto out_mount;
2714 }
2715
2716
2717
2718
2719#ifdef CONFIG_NETFILTER
2720 err = netfilter_init();
2721 if (err)
2722 goto out;
2723#endif
2724
2725 ptp_classifier_init();
2726
2727out:
2728 return err;
2729
2730out_mount:
2731 unregister_filesystem(&sock_fs_type);
2732out_fs:
2733 goto out;
2734}
2735
2736core_initcall(sock_init);
2737
2738#ifdef CONFIG_PROC_FS
2739void socket_seq_show(struct seq_file *seq)
2740{
2741 seq_printf(seq, "sockets: used %d\n",
2742 sock_inuse_get(seq->private));
2743}
2744#endif
2745
2746#ifdef CONFIG_COMPAT
2747static int do_siocgstamp(struct net *net, struct socket *sock,
2748 unsigned int cmd, void __user *up)
2749{
2750 mm_segment_t old_fs = get_fs();
2751 struct timeval ktv;
2752 int err;
2753
2754 set_fs(KERNEL_DS);
2755 err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv);
2756 set_fs(old_fs);
2757 if (!err)
2758 err = compat_put_timeval(&ktv, up);
2759
2760 return err;
2761}
2762
2763static int do_siocgstampns(struct net *net, struct socket *sock,
2764 unsigned int cmd, void __user *up)
2765{
2766 mm_segment_t old_fs = get_fs();
2767 struct timespec kts;
2768 int err;
2769
2770 set_fs(KERNEL_DS);
2771 err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts);
2772 set_fs(old_fs);
2773 if (!err)
2774 err = compat_put_timespec(&kts, up);
2775
2776 return err;
2777}
2778
2779static int compat_dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32)
2780{
2781 struct compat_ifconf ifc32;
2782 struct ifconf ifc;
2783 int err;
2784
2785 if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf)))
2786 return -EFAULT;
2787
2788 ifc.ifc_len = ifc32.ifc_len;
2789 ifc.ifc_req = compat_ptr(ifc32.ifcbuf);
2790
2791 rtnl_lock();
2792 err = dev_ifconf(net, &ifc, sizeof(struct compat_ifreq));
2793 rtnl_unlock();
2794 if (err)
2795 return err;
2796
2797 ifc32.ifc_len = ifc.ifc_len;
2798 if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf)))
2799 return -EFAULT;
2800
2801 return 0;
2802}
2803
2804static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32)
2805{
2806 struct compat_ethtool_rxnfc __user *compat_rxnfc;
2807 bool convert_in = false, convert_out = false;
2808 size_t buf_size = 0;
2809 struct ethtool_rxnfc __user *rxnfc = NULL;
2810 struct ifreq ifr;
2811 u32 rule_cnt = 0, actual_rule_cnt;
2812 u32 ethcmd;
2813 u32 data;
2814 int ret;
2815
2816 if (get_user(data, &ifr32->ifr_ifru.ifru_data))
2817 return -EFAULT;
2818
2819 compat_rxnfc = compat_ptr(data);
2820
2821 if (get_user(ethcmd, &compat_rxnfc->cmd))
2822 return -EFAULT;
2823
2824
2825
2826
2827 switch (ethcmd) {
2828 default:
2829 break;
2830 case ETHTOOL_GRXCLSRLALL:
2831
2832 if (get_user(rule_cnt, &compat_rxnfc->rule_cnt))
2833 return -EFAULT;
2834 if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32))
2835 return -ENOMEM;
2836 buf_size += rule_cnt * sizeof(u32);
2837
2838 case ETHTOOL_GRXRINGS:
2839 case ETHTOOL_GRXCLSRLCNT:
2840 case ETHTOOL_GRXCLSRULE:
2841 case ETHTOOL_SRXCLSRLINS:
2842 convert_out = true;
2843
2844 case ETHTOOL_SRXCLSRLDEL:
2845 buf_size += sizeof(struct ethtool_rxnfc);
2846 convert_in = true;
2847 rxnfc = compat_alloc_user_space(buf_size);
2848 break;
2849 }
2850
2851 if (copy_from_user(&ifr.ifr_name, &ifr32->ifr_name, IFNAMSIZ))
2852 return -EFAULT;
2853
2854 ifr.ifr_data = convert_in ? rxnfc : (void __user *)compat_rxnfc;
2855
2856 if (convert_in) {
2857
2858
2859
2860 BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) +
2861 sizeof(compat_rxnfc->fs.m_ext) !=
2862 offsetof(struct ethtool_rxnfc, fs.m_ext) +
2863 sizeof(rxnfc->fs.m_ext));
2864 BUILD_BUG_ON(
2865 offsetof(struct compat_ethtool_rxnfc, fs.location) -
2866 offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) !=
2867 offsetof(struct ethtool_rxnfc, fs.location) -
2868 offsetof(struct ethtool_rxnfc, fs.ring_cookie));
2869
2870 if (copy_in_user(rxnfc, compat_rxnfc,
2871 (void __user *)(&rxnfc->fs.m_ext + 1) -
2872 (void __user *)rxnfc) ||
2873 copy_in_user(&rxnfc->fs.ring_cookie,
2874 &compat_rxnfc->fs.ring_cookie,
2875 (void __user *)(&rxnfc->fs.location + 1) -
2876 (void __user *)&rxnfc->fs.ring_cookie) ||
2877 copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt,
2878 sizeof(rxnfc->rule_cnt)))
2879 return -EFAULT;
2880 }
2881
2882 ret = dev_ioctl(net, SIOCETHTOOL, &ifr, NULL);
2883 if (ret)
2884 return ret;
2885
2886 if (convert_out) {
2887 if (copy_in_user(compat_rxnfc, rxnfc,
2888 (const void __user *)(&rxnfc->fs.m_ext + 1) -
2889 (const void __user *)rxnfc) ||
2890 copy_in_user(&compat_rxnfc->fs.ring_cookie,
2891 &rxnfc->fs.ring_cookie,
2892 (const void __user *)(&rxnfc->fs.location + 1) -
2893 (const void __user *)&rxnfc->fs.ring_cookie) ||
2894 copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt,
2895 sizeof(rxnfc->rule_cnt)))
2896 return -EFAULT;
2897
2898 if (ethcmd == ETHTOOL_GRXCLSRLALL) {
2899
2900
2901
2902
2903
2904
2905
2906
2907 if (get_user(actual_rule_cnt, &rxnfc->rule_cnt))
2908 return -EFAULT;
2909 if (actual_rule_cnt < rule_cnt)
2910 rule_cnt = actual_rule_cnt;
2911 if (copy_in_user(&compat_rxnfc->rule_locs[0],
2912 &rxnfc->rule_locs[0],
2913 rule_cnt * sizeof(u32)))
2914 return -EFAULT;
2915 }
2916 }
2917
2918 return 0;
2919}
2920
2921static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32)
2922{
2923 compat_uptr_t uptr32;
2924 struct ifreq ifr;
2925 void __user *saved;
2926 int err;
2927
2928 if (copy_from_user(&ifr, uifr32, sizeof(struct compat_ifreq)))
2929 return -EFAULT;
2930
2931 if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu))
2932 return -EFAULT;
2933
2934 saved = ifr.ifr_settings.ifs_ifsu.raw_hdlc;
2935 ifr.ifr_settings.ifs_ifsu.raw_hdlc = compat_ptr(uptr32);
2936
2937 err = dev_ioctl(net, SIOCWANDEV, &ifr, NULL);
2938 if (!err) {
2939 ifr.ifr_settings.ifs_ifsu.raw_hdlc = saved;
2940 if (copy_to_user(uifr32, &ifr, sizeof(struct compat_ifreq)))
2941 err = -EFAULT;
2942 }
2943 return err;
2944}
2945
2946
2947static int compat_ifr_data_ioctl(struct net *net, unsigned int cmd,
2948 struct compat_ifreq __user *u_ifreq32)
2949{
2950 struct ifreq ifreq;
2951 u32 data32;
2952
2953 if (copy_from_user(ifreq.ifr_name, u_ifreq32->ifr_name, IFNAMSIZ))
2954 return -EFAULT;
2955 if (get_user(data32, &u_ifreq32->ifr_data))
2956 return -EFAULT;
2957 ifreq.ifr_data = compat_ptr(data32);
2958
2959 return dev_ioctl(net, cmd, &ifreq, NULL);
2960}
2961
2962static int compat_sioc_ifmap(struct net *net, unsigned int cmd,
2963 struct compat_ifreq __user *uifr32)
2964{
2965 struct ifreq ifr;
2966 struct compat_ifmap __user *uifmap32;
2967 int err;
2968
2969 uifmap32 = &uifr32->ifr_ifru.ifru_map;
2970 err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name));
2971 err |= get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start);
2972 err |= get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end);
2973 err |= get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr);
2974 err |= get_user(ifr.ifr_map.irq, &uifmap32->irq);
2975 err |= get_user(ifr.ifr_map.dma, &uifmap32->dma);
2976 err |= get_user(ifr.ifr_map.port, &uifmap32->port);
2977 if (err)
2978 return -EFAULT;
2979
2980 err = dev_ioctl(net, cmd, &ifr, NULL);
2981
2982 if (cmd == SIOCGIFMAP && !err) {
2983 err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name));
2984 err |= put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start);
2985 err |= put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end);
2986 err |= put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr);
2987 err |= put_user(ifr.ifr_map.irq, &uifmap32->irq);
2988 err |= put_user(ifr.ifr_map.dma, &uifmap32->dma);
2989 err |= put_user(ifr.ifr_map.port, &uifmap32->port);
2990 if (err)
2991 err = -EFAULT;
2992 }
2993 return err;
2994}
2995
2996struct rtentry32 {
2997 u32 rt_pad1;
2998 struct sockaddr rt_dst;
2999 struct sockaddr rt_gateway;
3000 struct sockaddr rt_genmask;
3001 unsigned short rt_flags;
3002 short rt_pad2;
3003 u32 rt_pad3;
3004 unsigned char rt_tos;
3005 unsigned char rt_class;
3006 short rt_pad4;
3007 short rt_metric;
3008 u32 rt_dev;
3009 u32 rt_mtu;
3010 u32 rt_window;
3011 unsigned short rt_irtt;
3012};
3013
3014struct in6_rtmsg32 {
3015 struct in6_addr rtmsg_dst;
3016 struct in6_addr rtmsg_src;
3017 struct in6_addr rtmsg_gateway;
3018 u32 rtmsg_type;
3019 u16 rtmsg_dst_len;
3020 u16 rtmsg_src_len;
3021 u32 rtmsg_metric;
3022 u32 rtmsg_info;
3023 u32 rtmsg_flags;
3024 s32 rtmsg_ifindex;
3025};
3026
3027static int routing_ioctl(struct net *net, struct socket *sock,
3028 unsigned int cmd, void __user *argp)
3029{
3030 int ret;
3031 void *r = NULL;
3032 struct in6_rtmsg r6;
3033 struct rtentry r4;
3034 char devname[16];
3035 u32 rtdev;
3036 mm_segment_t old_fs = get_fs();
3037
3038 if (sock && sock->sk && sock->sk->sk_family == AF_INET6) {
3039 struct in6_rtmsg32 __user *ur6 = argp;
3040 ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst),
3041 3 * sizeof(struct in6_addr));
3042 ret |= get_user(r6.rtmsg_type, &(ur6->rtmsg_type));
3043 ret |= get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len));
3044 ret |= get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len));
3045 ret |= get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric));
3046 ret |= get_user(r6.rtmsg_info, &(ur6->rtmsg_info));
3047 ret |= get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags));
3048 ret |= get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex));
3049
3050 r = (void *) &r6;
3051 } else {
3052 struct rtentry32 __user *ur4 = argp;
3053 ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst),
3054 3 * sizeof(struct sockaddr));
3055 ret |= get_user(r4.rt_flags, &(ur4->rt_flags));
3056 ret |= get_user(r4.rt_metric, &(ur4->rt_metric));
3057 ret |= get_user(r4.rt_mtu, &(ur4->rt_mtu));
3058 ret |= get_user(r4.rt_window, &(ur4->rt_window));
3059 ret |= get_user(r4.rt_irtt, &(ur4->rt_irtt));
3060 ret |= get_user(rtdev, &(ur4->rt_dev));
3061 if (rtdev) {
3062 ret |= copy_from_user(devname, compat_ptr(rtdev), 15);
3063 r4.rt_dev = (char __user __force *)devname;
3064 devname[15] = 0;
3065 } else
3066 r4.rt_dev = NULL;
3067
3068 r = (void *) &r4;
3069 }
3070
3071 if (ret) {
3072 ret = -EFAULT;
3073 goto out;
3074 }
3075
3076 set_fs(KERNEL_DS);
3077 ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r);
3078 set_fs(old_fs);
3079
3080out:
3081 return ret;
3082}
3083
3084
3085
3086
3087
3088static int old_bridge_ioctl(compat_ulong_t __user *argp)
3089{
3090 compat_ulong_t tmp;
3091
3092 if (get_user(tmp, argp))
3093 return -EFAULT;
3094 if (tmp == BRCTL_GET_VERSION)
3095 return BRCTL_VERSION + 1;
3096 return -EINVAL;
3097}
3098
3099static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
3100 unsigned int cmd, unsigned long arg)
3101{
3102 void __user *argp = compat_ptr(arg);
3103 struct sock *sk = sock->sk;
3104 struct net *net = sock_net(sk);
3105
3106 if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15))
3107 return compat_ifr_data_ioctl(net, cmd, argp);
3108
3109 switch (cmd) {
3110 case SIOCSIFBR:
3111 case SIOCGIFBR:
3112 return old_bridge_ioctl(argp);
3113 case SIOCGIFCONF:
3114 return compat_dev_ifconf(net, argp);
3115 case SIOCETHTOOL:
3116 return ethtool_ioctl(net, argp);
3117 case SIOCWANDEV:
3118 return compat_siocwandev(net, argp);
3119 case SIOCGIFMAP:
3120 case SIOCSIFMAP:
3121 return compat_sioc_ifmap(net, cmd, argp);
3122 case SIOCADDRT:
3123 case SIOCDELRT:
3124 return routing_ioctl(net, sock, cmd, argp);
3125 case SIOCGSTAMP:
3126 return do_siocgstamp(net, sock, cmd, argp);
3127 case SIOCGSTAMPNS:
3128 return do_siocgstampns(net, sock, cmd, argp);
3129 case SIOCBONDSLAVEINFOQUERY:
3130 case SIOCBONDINFOQUERY:
3131 case SIOCSHWTSTAMP:
3132 case SIOCGHWTSTAMP:
3133 return compat_ifr_data_ioctl(net, cmd, argp);
3134
3135 case FIOSETOWN:
3136 case SIOCSPGRP:
3137 case FIOGETOWN:
3138 case SIOCGPGRP:
3139 case SIOCBRADDBR:
3140 case SIOCBRDELBR:
3141 case SIOCGIFVLAN:
3142 case SIOCSIFVLAN:
3143 case SIOCADDDLCI:
3144 case SIOCDELDLCI:
3145 case SIOCGSKNS:
3146 return sock_ioctl(file, cmd, arg);
3147
3148 case SIOCGIFFLAGS:
3149 case SIOCSIFFLAGS:
3150 case SIOCGIFMETRIC:
3151 case SIOCSIFMETRIC:
3152 case SIOCGIFMTU:
3153 case SIOCSIFMTU:
3154 case SIOCGIFMEM:
3155 case SIOCSIFMEM:
3156 case SIOCGIFHWADDR:
3157 case SIOCSIFHWADDR:
3158 case SIOCADDMULTI:
3159 case SIOCDELMULTI:
3160 case SIOCGIFINDEX:
3161 case SIOCGIFADDR:
3162 case SIOCSIFADDR:
3163 case SIOCSIFHWBROADCAST:
3164 case SIOCDIFADDR:
3165 case SIOCGIFBRDADDR:
3166 case SIOCSIFBRDADDR:
3167 case SIOCGIFDSTADDR:
3168 case SIOCSIFDSTADDR:
3169 case SIOCGIFNETMASK:
3170 case SIOCSIFNETMASK:
3171 case SIOCSIFPFLAGS:
3172 case SIOCGIFPFLAGS:
3173 case SIOCGIFTXQLEN:
3174 case SIOCSIFTXQLEN:
3175 case SIOCBRADDIF:
3176 case SIOCBRDELIF:
3177 case SIOCSIFNAME:
3178 case SIOCGMIIPHY:
3179 case SIOCGMIIREG:
3180 case SIOCSMIIREG:
3181 case SIOCSARP:
3182 case SIOCGARP:
3183 case SIOCDARP:
3184 case SIOCATMARK:
3185 case SIOCBONDENSLAVE:
3186 case SIOCBONDRELEASE:
3187 case SIOCBONDSETHWADDR:
3188 case SIOCBONDCHANGEACTIVE:
3189 case SIOCGIFNAME:
3190 return sock_do_ioctl(net, sock, cmd, arg);
3191 }
3192
3193 return -ENOIOCTLCMD;
3194}
3195
3196static long compat_sock_ioctl(struct file *file, unsigned int cmd,
3197 unsigned long arg)
3198{
3199 struct socket *sock = file->private_data;
3200 int ret = -ENOIOCTLCMD;
3201 struct sock *sk;
3202 struct net *net;
3203
3204 sk = sock->sk;
3205 net = sock_net(sk);
3206
3207 if (sock->ops->compat_ioctl)
3208 ret = sock->ops->compat_ioctl(sock, cmd, arg);
3209
3210 if (ret == -ENOIOCTLCMD &&
3211 (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST))
3212 ret = compat_wext_handle_ioctl(net, cmd, arg);
3213
3214 if (ret == -ENOIOCTLCMD)
3215 ret = compat_sock_ioctl_trans(file, sock, cmd, arg);
3216
3217 return ret;
3218}
3219#endif
3220
3221int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen)
3222{
3223 return sock->ops->bind(sock, addr, addrlen);
3224}
3225EXPORT_SYMBOL(kernel_bind);
3226
3227int kernel_listen(struct socket *sock, int backlog)
3228{
3229 return sock->ops->listen(sock, backlog);
3230}
3231EXPORT_SYMBOL(kernel_listen);
3232
3233int kernel_accept(struct socket *sock, struct socket **newsock, int flags)
3234{
3235 struct sock *sk = sock->sk;
3236 int err;
3237
3238 err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol,
3239 newsock);
3240 if (err < 0)
3241 goto done;
3242
3243 err = sock->ops->accept(sock, *newsock, flags, true);
3244 if (err < 0) {
3245 sock_release(*newsock);
3246 *newsock = NULL;
3247 goto done;
3248 }
3249
3250 (*newsock)->ops = sock->ops;
3251 __module_get((*newsock)->ops->owner);
3252
3253done:
3254 return err;
3255}
3256EXPORT_SYMBOL(kernel_accept);
3257
3258int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen,
3259 int flags)
3260{
3261 return sock->ops->connect(sock, addr, addrlen, flags);
3262}
3263EXPORT_SYMBOL(kernel_connect);
3264
3265int kernel_getsockname(struct socket *sock, struct sockaddr *addr)
3266{
3267 return sock->ops->getname(sock, addr, 0);
3268}
3269EXPORT_SYMBOL(kernel_getsockname);
3270
3271int kernel_getpeername(struct socket *sock, struct sockaddr *addr)
3272{
3273 return sock->ops->getname(sock, addr, 1);
3274}
3275EXPORT_SYMBOL(kernel_getpeername);
3276
3277int kernel_getsockopt(struct socket *sock, int level, int optname,
3278 char *optval, int *optlen)
3279{
3280 mm_segment_t oldfs = get_fs();
3281 char __user *uoptval;
3282 int __user *uoptlen;
3283 int err;
3284
3285 uoptval = (char __user __force *) optval;
3286 uoptlen = (int __user __force *) optlen;
3287
3288 set_fs(KERNEL_DS);
3289 if (level == SOL_SOCKET)
3290 err = sock_getsockopt(sock, level, optname, uoptval, uoptlen);
3291 else
3292 err = sock->ops->getsockopt(sock, level, optname, uoptval,
3293 uoptlen);
3294 set_fs(oldfs);
3295 return err;
3296}
3297EXPORT_SYMBOL(kernel_getsockopt);
3298
3299int kernel_setsockopt(struct socket *sock, int level, int optname,
3300 char *optval, unsigned int optlen)
3301{
3302 mm_segment_t oldfs = get_fs();
3303 char __user *uoptval;
3304 int err;
3305
3306 uoptval = (char __user __force *) optval;
3307
3308 set_fs(KERNEL_DS);
3309 if (level == SOL_SOCKET)
3310 err = sock_setsockopt(sock, level, optname, uoptval, optlen);
3311 else
3312 err = sock->ops->setsockopt(sock, level, optname, uoptval,
3313 optlen);
3314 set_fs(oldfs);
3315 return err;
3316}
3317EXPORT_SYMBOL(kernel_setsockopt);
3318
3319int kernel_sendpage(struct socket *sock, struct page *page, int offset,
3320 size_t size, int flags)
3321{
3322 if (sock->ops->sendpage)
3323 return sock->ops->sendpage(sock, page, offset, size, flags);
3324
3325 return sock_no_sendpage(sock, page, offset, size, flags);
3326}
3327EXPORT_SYMBOL(kernel_sendpage);
3328
3329int kernel_sendpage_locked(struct sock *sk, struct page *page, int offset,
3330 size_t size, int flags)
3331{
3332 struct socket *sock = sk->sk_socket;
3333
3334 if (sock->ops->sendpage_locked)
3335 return sock->ops->sendpage_locked(sk, page, offset, size,
3336 flags);
3337
3338 return sock_no_sendpage_locked(sk, page, offset, size, flags);
3339}
3340EXPORT_SYMBOL(kernel_sendpage_locked);
3341
3342int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how)
3343{
3344 return sock->ops->shutdown(sock, how);
3345}
3346EXPORT_SYMBOL(kernel_sock_shutdown);
3347
3348
3349
3350
3351
3352
3353u32 kernel_sock_ip_overhead(struct sock *sk)
3354{
3355 struct inet_sock *inet;
3356 struct ip_options_rcu *opt;
3357 u32 overhead = 0;
3358#if IS_ENABLED(CONFIG_IPV6)
3359 struct ipv6_pinfo *np;
3360 struct ipv6_txoptions *optv6 = NULL;
3361#endif
3362
3363 if (!sk)
3364 return overhead;
3365
3366 switch (sk->sk_family) {
3367 case AF_INET:
3368 inet = inet_sk(sk);
3369 overhead += sizeof(struct iphdr);
3370 opt = rcu_dereference_protected(inet->inet_opt,
3371 sock_owned_by_user(sk));
3372 if (opt)
3373 overhead += opt->opt.optlen;
3374 return overhead;
3375#if IS_ENABLED(CONFIG_IPV6)
3376 case AF_INET6:
3377 np = inet6_sk(sk);
3378 overhead += sizeof(struct ipv6hdr);
3379 if (np)
3380 optv6 = rcu_dereference_protected(np->opt,
3381 sock_owned_by_user(sk));
3382 if (optv6)
3383 overhead += (optv6->opt_flen + optv6->opt_nflen);
3384 return overhead;
3385#endif
3386 default:
3387 return overhead;
3388 }
3389}
3390EXPORT_SYMBOL(kernel_sock_ip_overhead);
3391