2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Generic socket support routines. Memory allocators, socket lock/release
7 * handler for protocols to use and generic option handler.
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Florian La Roche, <flla@stud.uni-sb.de>
13 * Alan Cox, <A.Cox@swansea.ac.uk>
16 * Alan Cox : Numerous verify_area() problems
17 * Alan Cox : Connecting on a connecting socket
18 * now returns an error for tcp.
19 * Alan Cox : sock->protocol is set correctly.
20 * and is not sometimes left as 0.
21 * Alan Cox : connect handles icmp errors on a
22 * connect properly. Unfortunately there
23 * is a restart syscall nasty there. I
24 * can't match BSD without hacking the C
25 * library. Ideas urgently sought!
26 * Alan Cox : Disallow bind() to addresses that are
27 * not ours - especially broadcast ones!!
28 * Alan Cox : Socket 1024 _IS_ ok for users. (fencepost)
29 * Alan Cox : sock_wfree/sock_rfree don't destroy sockets,
30 * instead they leave that for the DESTROY timer.
31 * Alan Cox : Clean up error flag in accept
32 * Alan Cox : TCP ack handling is buggy, the DESTROY timer
33 * was buggy. Put a remove_sock() in the handler
34 * for memory when we hit 0. Also altered the timer
35 * code. The ACK stuff can wait and needs major
37 * Alan Cox : Fixed TCP ack bug, removed remove sock
38 * and fixed timer/inet_bh race.
39 * Alan Cox : Added zapped flag for TCP
40 * Alan Cox : Move kfree_skb into skbuff.c and tidied up surplus code
41 * Alan Cox : for new sk_buff allocations wmalloc/rmalloc now call alloc_skb
42 * Alan Cox : kfree_s calls now are kfree_skbmem so we can track skb resources
43 * Alan Cox : Supports socket option broadcast now as does udp. Packet and raw need fixing.
44 * Alan Cox : Added RCVBUF,SNDBUF size setting. It suddenly occurred to me how easy it was so...
45 * Rick Sladkey : Relaxed UDP rules for matching packets.
46 * C.E.Hawkins : IFF_PROMISC/SIOCGHWADDR support
47 * Pauline Middelink : identd support
48 * Alan Cox : Fixed connect() taking signals I think.
49 * Alan Cox : SO_LINGER supported
50 * Alan Cox : Error reporting fixes
51 * Anonymous : inet_create tidied up (sk->reuse setting)
52 * Alan Cox : inet sockets don't set sk->type!
53 * Alan Cox : Split socket option code
54 * Alan Cox : Callbacks
55 * Alan Cox : Nagle flag for Charles & Johannes stuff
56 * Alex : Removed restriction on inet fioctl
57 * Alan Cox : Splitting INET from NET core
58 * Alan Cox : Fixed bogus SO_TYPE handling in getsockopt()
59 * Adam Caldwell : Missing return in SO_DONTROUTE/SO_DEBUG code
60 * Alan Cox : Split IP from generic code
61 * Alan Cox : New kfree_skbmem()
62 * Alan Cox : Make SO_DEBUG superuser only.
63 * Alan Cox : Allow anyone to clear SO_DEBUG
65 * Alan Cox : Added optimistic memory grabbing for AF_UNIX throughput.
66 * Alan Cox : Allocator for a socket is settable.
67 * Alan Cox : SO_ERROR includes soft errors.
68 * Alan Cox : Allow NULL arguments on some SO_ opts
69 * Alan Cox : Generic socket allocation to make hooks
70 * easier (suggested by Craig Metz).
71 * Michael Pall : SO_ERROR returns positive errno again
72 * Steve Whitehouse: Added default destructor to free
73 * protocol private data.
74 * Steve Whitehouse: Added various other default routines
75 * common to several socket families.
76 * Chris Evans : Call suser() check last on F_SETOWN
77 * Jay Schulist : Added SO_ATTACH_FILTER and SO_DETACH_FILTER.
78 * Andi Kleen : Add sock_kmalloc()/sock_kfree_s()
79 * Andi Kleen : Fix write_space callback
80 * Chris Evans : Security fixes - signedness again
81 * Arnaldo C. Melo : cleanups, use skb_queue_purge
86 * This program is free software; you can redistribute it and/or
87 * modify it under the terms of the GNU General Public License
88 * as published by the Free Software Foundation; either version
89 * 2 of the License, or (at your option) any later version.
92 #include <linux/capability.h>
93 #include <linux/errno.h>
94 #include <linux/types.h>
95 #include <linux/socket.h>
97 #include <linux/kernel.h>
98 #include <linux/module.h>
99 #include <linux/proc_fs.h>
100 #include <linux/seq_file.h>
101 #include <linux/sched.h>
102 #include <linux/timer.h>
103 #include <linux/string.h>
104 #include <linux/sockios.h>
105 #include <linux/net.h>
106 #include <linux/mm.h>
107 #include <linux/slab.h>
108 #include <linux/interrupt.h>
109 #include <linux/poll.h>
110 #include <linux/tcp.h>
111 #include <linux/init.h>
112 #include <linux/highmem.h>
114 #include <asm/uaccess.h>
115 #include <asm/system.h>
117 #include <linux/netdevice.h>
118 #include <net/protocol.h>
119 #include <linux/skbuff.h>
120 #include <net/net_namespace.h>
121 #include <net/request_sock.h>
122 #include <net/sock.h>
123 #include <linux/net_tstamp.h>
124 #include <net/xfrm.h>
125 #include <linux/ipsec.h>
127 #include <linux/filter.h>
134 * Each address family might have different locking rules, so we have
135 * one slock key per address family:
137 static struct lock_class_key af_family_keys
[AF_MAX
];
138 static struct lock_class_key af_family_slock_keys
[AF_MAX
];
141 * Make lock validator output more readable. (we pre-construct these
142 * strings build-time, so that runtime initialization of socket
145 static const char *af_family_key_strings
[AF_MAX
+1] = {
146 "sk_lock-AF_UNSPEC", "sk_lock-AF_UNIX" , "sk_lock-AF_INET" ,
147 "sk_lock-AF_AX25" , "sk_lock-AF_IPX" , "sk_lock-AF_APPLETALK",
148 "sk_lock-AF_NETROM", "sk_lock-AF_BRIDGE" , "sk_lock-AF_ATMPVC" ,
149 "sk_lock-AF_X25" , "sk_lock-AF_INET6" , "sk_lock-AF_ROSE" ,
150 "sk_lock-AF_DECnet", "sk_lock-AF_NETBEUI" , "sk_lock-AF_SECURITY" ,
151 "sk_lock-AF_KEY" , "sk_lock-AF_NETLINK" , "sk_lock-AF_PACKET" ,
152 "sk_lock-AF_ASH" , "sk_lock-AF_ECONET" , "sk_lock-AF_ATMSVC" ,
153 "sk_lock-21" , "sk_lock-AF_SNA" , "sk_lock-AF_IRDA" ,
154 "sk_lock-AF_PPPOX" , "sk_lock-AF_WANPIPE" , "sk_lock-AF_LLC" ,
155 "sk_lock-27" , "sk_lock-28" , "sk_lock-AF_CAN" ,
156 "sk_lock-AF_TIPC" , "sk_lock-AF_BLUETOOTH", "sk_lock-IUCV" ,
157 "sk_lock-AF_RXRPC" , "sk_lock-AF_ISDN" , "sk_lock-AF_PHONET" ,
160 static const char *af_family_slock_key_strings
[AF_MAX
+1] = {
161 "slock-AF_UNSPEC", "slock-AF_UNIX" , "slock-AF_INET" ,
162 "slock-AF_AX25" , "slock-AF_IPX" , "slock-AF_APPLETALK",
163 "slock-AF_NETROM", "slock-AF_BRIDGE" , "slock-AF_ATMPVC" ,
164 "slock-AF_X25" , "slock-AF_INET6" , "slock-AF_ROSE" ,
165 "slock-AF_DECnet", "slock-AF_NETBEUI" , "slock-AF_SECURITY" ,
166 "slock-AF_KEY" , "slock-AF_NETLINK" , "slock-AF_PACKET" ,
167 "slock-AF_ASH" , "slock-AF_ECONET" , "slock-AF_ATMSVC" ,
168 "slock-21" , "slock-AF_SNA" , "slock-AF_IRDA" ,
169 "slock-AF_PPPOX" , "slock-AF_WANPIPE" , "slock-AF_LLC" ,
170 "slock-27" , "slock-28" , "slock-AF_CAN" ,
171 "slock-AF_TIPC" , "slock-AF_BLUETOOTH", "slock-AF_IUCV" ,
172 "slock-AF_RXRPC" , "slock-AF_ISDN" , "slock-AF_PHONET" ,
175 static const char *af_family_clock_key_strings
[AF_MAX
+1] = {
176 "clock-AF_UNSPEC", "clock-AF_UNIX" , "clock-AF_INET" ,
177 "clock-AF_AX25" , "clock-AF_IPX" , "clock-AF_APPLETALK",
178 "clock-AF_NETROM", "clock-AF_BRIDGE" , "clock-AF_ATMPVC" ,
179 "clock-AF_X25" , "clock-AF_INET6" , "clock-AF_ROSE" ,
180 "clock-AF_DECnet", "clock-AF_NETBEUI" , "clock-AF_SECURITY" ,
181 "clock-AF_KEY" , "clock-AF_NETLINK" , "clock-AF_PACKET" ,
182 "clock-AF_ASH" , "clock-AF_ECONET" , "clock-AF_ATMSVC" ,
183 "clock-21" , "clock-AF_SNA" , "clock-AF_IRDA" ,
184 "clock-AF_PPPOX" , "clock-AF_WANPIPE" , "clock-AF_LLC" ,
185 "clock-27" , "clock-28" , "clock-AF_CAN" ,
186 "clock-AF_TIPC" , "clock-AF_BLUETOOTH", "clock-AF_IUCV" ,
187 "clock-AF_RXRPC" , "clock-AF_ISDN" , "clock-AF_PHONET" ,
192 * sk_callback_lock locking rules are per-address-family,
193 * so split the lock classes by using a per-AF key:
195 static struct lock_class_key af_callback_keys
[AF_MAX
];
197 /* Take into consideration the size of the struct sk_buff overhead in the
198 * determination of these values, since that is non-constant across
199 * platforms. This makes socket queueing behavior and performance
200 * not depend upon such differences.
202 #define _SK_MEM_PACKETS 256
203 #define _SK_MEM_OVERHEAD (sizeof(struct sk_buff) + 256)
204 #define SK_WMEM_MAX (_SK_MEM_OVERHEAD * _SK_MEM_PACKETS)
205 #define SK_RMEM_MAX (_SK_MEM_OVERHEAD * _SK_MEM_PACKETS)
207 /* Run time adjustable parameters. */
208 __u32 sysctl_wmem_max __read_mostly
= SK_WMEM_MAX
;
209 __u32 sysctl_rmem_max __read_mostly
= SK_RMEM_MAX
;
210 __u32 sysctl_wmem_default __read_mostly
= SK_WMEM_MAX
;
211 __u32 sysctl_rmem_default __read_mostly
= SK_RMEM_MAX
;
213 /* Maximal space eaten by iovec or ancilliary data plus some space */
214 int sysctl_optmem_max __read_mostly
= sizeof(unsigned long)*(2*UIO_MAXIOV
+512);
216 static int sock_set_timeout(long *timeo_p
, char __user
*optval
, int optlen
)
220 if (optlen
< sizeof(tv
))
222 if (copy_from_user(&tv
, optval
, sizeof(tv
)))
224 if (tv
.tv_usec
< 0 || tv
.tv_usec
>= USEC_PER_SEC
)
228 static int warned __read_mostly
;
231 if (warned
< 10 && net_ratelimit()) {
233 printk(KERN_INFO
"sock_set_timeout: `%s' (pid %d) "
234 "tries to set negative timeout\n",
235 current
->comm
, task_pid_nr(current
));
239 *timeo_p
= MAX_SCHEDULE_TIMEOUT
;
240 if (tv
.tv_sec
== 0 && tv
.tv_usec
== 0)
242 if (tv
.tv_sec
< (MAX_SCHEDULE_TIMEOUT
/HZ
- 1))
243 *timeo_p
= tv
.tv_sec
*HZ
+ (tv
.tv_usec
+(1000000/HZ
-1))/(1000000/HZ
);
247 static void sock_warn_obsolete_bsdism(const char *name
)
250 static char warncomm
[TASK_COMM_LEN
];
251 if (strcmp(warncomm
, current
->comm
) && warned
< 5) {
252 strcpy(warncomm
, current
->comm
);
253 printk(KERN_WARNING
"process `%s' is using obsolete "
254 "%s SO_BSDCOMPAT\n", warncomm
, name
);
259 static void sock_disable_timestamp(struct sock
*sk
, int flag
)
261 if (sock_flag(sk
, flag
)) {
262 sock_reset_flag(sk
, flag
);
263 if (!sock_flag(sk
, SOCK_TIMESTAMP
) &&
264 !sock_flag(sk
, SOCK_TIMESTAMPING_RX_SOFTWARE
)) {
265 net_disable_timestamp();
271 int sock_queue_rcv_skb(struct sock
*sk
, struct sk_buff
*skb
)
276 /* Cast sk->rcvbuf to unsigned... It's pointless, but reduces
277 number of warnings when compiling with -W --ANK
279 if (atomic_read(&sk
->sk_rmem_alloc
) + skb
->truesize
>=
280 (unsigned)sk
->sk_rcvbuf
) {
285 err
= sk_filter(sk
, skb
);
289 if (!sk_rmem_schedule(sk
, skb
->truesize
)) {
295 skb_set_owner_r(skb
, sk
);
297 /* Cache the SKB length before we tack it onto the receive
298 * queue. Once it is added it no longer belongs to us and
299 * may be freed by other threads of control pulling packets
304 skb_queue_tail(&sk
->sk_receive_queue
, skb
);
306 if (!sock_flag(sk
, SOCK_DEAD
))
307 sk
->sk_data_ready(sk
, skb_len
);
311 EXPORT_SYMBOL(sock_queue_rcv_skb
);
313 int sk_receive_skb(struct sock
*sk
, struct sk_buff
*skb
, const int nested
)
315 int rc
= NET_RX_SUCCESS
;
317 if (sk_filter(sk
, skb
))
318 goto discard_and_relse
;
323 bh_lock_sock_nested(sk
);
326 if (!sock_owned_by_user(sk
)) {
328 * trylock + unlock semantics:
330 mutex_acquire(&sk
->sk_lock
.dep_map
, 0, 1, _RET_IP_
);
332 rc
= sk_backlog_rcv(sk
, skb
);
334 mutex_release(&sk
->sk_lock
.dep_map
, 1, _RET_IP_
);
336 sk_add_backlog(sk
, skb
);
345 EXPORT_SYMBOL(sk_receive_skb
);
347 struct dst_entry
*__sk_dst_check(struct sock
*sk
, u32 cookie
)
349 struct dst_entry
*dst
= sk
->sk_dst_cache
;
351 if (dst
&& dst
->obsolete
&& dst
->ops
->check(dst
, cookie
) == NULL
) {
352 sk
->sk_dst_cache
= NULL
;
359 EXPORT_SYMBOL(__sk_dst_check
);
361 struct dst_entry
*sk_dst_check(struct sock
*sk
, u32 cookie
)
363 struct dst_entry
*dst
= sk_dst_get(sk
);
365 if (dst
&& dst
->obsolete
&& dst
->ops
->check(dst
, cookie
) == NULL
) {
373 EXPORT_SYMBOL(sk_dst_check
);
375 static int sock_bindtodevice(struct sock
*sk
, char __user
*optval
, int optlen
)
377 int ret
= -ENOPROTOOPT
;
378 #ifdef CONFIG_NETDEVICES
379 struct net
*net
= sock_net(sk
);
380 char devname
[IFNAMSIZ
];
385 if (!capable(CAP_NET_RAW
))
392 /* Bind this socket to a particular device like "eth0",
393 * as specified in the passed interface name. If the
394 * name is "" or the option length is zero the socket
397 if (optlen
> IFNAMSIZ
- 1)
398 optlen
= IFNAMSIZ
- 1;
399 memset(devname
, 0, sizeof(devname
));
402 if (copy_from_user(devname
, optval
, optlen
))
405 if (devname
[0] == '\0') {
408 struct net_device
*dev
= dev_get_by_name(net
, devname
);
414 index
= dev
->ifindex
;
419 sk
->sk_bound_dev_if
= index
;
431 static inline void sock_valbool_flag(struct sock
*sk
, int bit
, int valbool
)
434 sock_set_flag(sk
, bit
);
436 sock_reset_flag(sk
, bit
);
440 * This is meant for all protocols to use and covers goings on
441 * at the socket level. Everything here is generic.
444 int sock_setsockopt(struct socket
*sock
, int level
, int optname
,
445 char __user
*optval
, int optlen
)
447 struct sock
*sk
=sock
->sk
;
454 * Options without arguments
457 if (optname
== SO_BINDTODEVICE
)
458 return sock_bindtodevice(sk
, optval
, optlen
);
460 if (optlen
< sizeof(int))
463 if (get_user(val
, (int __user
*)optval
))
472 if (val
&& !capable(CAP_NET_ADMIN
)) {
475 sock_valbool_flag(sk
, SOCK_DBG
, valbool
);
478 sk
->sk_reuse
= valbool
;
485 sock_valbool_flag(sk
, SOCK_LOCALROUTE
, valbool
);
488 sock_valbool_flag(sk
, SOCK_BROADCAST
, valbool
);
491 /* Don't error on this BSD doesn't and if you think
492 about it this is right. Otherwise apps have to
493 play 'guess the biggest size' games. RCVBUF/SNDBUF
494 are treated in BSD as hints */
496 if (val
> sysctl_wmem_max
)
497 val
= sysctl_wmem_max
;
499 sk
->sk_userlocks
|= SOCK_SNDBUF_LOCK
;
500 if ((val
* 2) < SOCK_MIN_SNDBUF
)
501 sk
->sk_sndbuf
= SOCK_MIN_SNDBUF
;
503 sk
->sk_sndbuf
= val
* 2;
506 * Wake up sending tasks if we
509 sk
->sk_write_space(sk
);
513 if (!capable(CAP_NET_ADMIN
)) {
520 /* Don't error on this BSD doesn't and if you think
521 about it this is right. Otherwise apps have to
522 play 'guess the biggest size' games. RCVBUF/SNDBUF
523 are treated in BSD as hints */
525 if (val
> sysctl_rmem_max
)
526 val
= sysctl_rmem_max
;
528 sk
->sk_userlocks
|= SOCK_RCVBUF_LOCK
;
530 * We double it on the way in to account for
531 * "struct sk_buff" etc. overhead. Applications
532 * assume that the SO_RCVBUF setting they make will
533 * allow that much actual data to be received on that
536 * Applications are unaware that "struct sk_buff" and
537 * other overheads allocate from the receive buffer
538 * during socket buffer allocation.
540 * And after considering the possible alternatives,
541 * returning the value we actually used in getsockopt
542 * is the most desirable behavior.
544 if ((val
* 2) < SOCK_MIN_RCVBUF
)
545 sk
->sk_rcvbuf
= SOCK_MIN_RCVBUF
;
547 sk
->sk_rcvbuf
= val
* 2;
551 if (!capable(CAP_NET_ADMIN
)) {
559 if (sk
->sk_protocol
== IPPROTO_TCP
)
560 tcp_set_keepalive(sk
, valbool
);
562 sock_valbool_flag(sk
, SOCK_KEEPOPEN
, valbool
);
566 sock_valbool_flag(sk
, SOCK_URGINLINE
, valbool
);
570 sk
->sk_no_check
= valbool
;
574 if ((val
>= 0 && val
<= 6) || capable(CAP_NET_ADMIN
))
575 sk
->sk_priority
= val
;
581 if (optlen
< sizeof(ling
)) {
582 ret
= -EINVAL
; /* 1003.1g */
585 if (copy_from_user(&ling
,optval
,sizeof(ling
))) {
590 sock_reset_flag(sk
, SOCK_LINGER
);
592 #if (BITS_PER_LONG == 32)
593 if ((unsigned int)ling
.l_linger
>= MAX_SCHEDULE_TIMEOUT
/HZ
)
594 sk
->sk_lingertime
= MAX_SCHEDULE_TIMEOUT
;
597 sk
->sk_lingertime
= (unsigned int)ling
.l_linger
* HZ
;
598 sock_set_flag(sk
, SOCK_LINGER
);
603 sock_warn_obsolete_bsdism("setsockopt");
608 set_bit(SOCK_PASSCRED
, &sock
->flags
);
610 clear_bit(SOCK_PASSCRED
, &sock
->flags
);
616 if (optname
== SO_TIMESTAMP
)
617 sock_reset_flag(sk
, SOCK_RCVTSTAMPNS
);
619 sock_set_flag(sk
, SOCK_RCVTSTAMPNS
);
620 sock_set_flag(sk
, SOCK_RCVTSTAMP
);
621 sock_enable_timestamp(sk
, SOCK_TIMESTAMP
);
623 sock_reset_flag(sk
, SOCK_RCVTSTAMP
);
624 sock_reset_flag(sk
, SOCK_RCVTSTAMPNS
);
628 case SO_TIMESTAMPING
:
629 if (val
& ~SOF_TIMESTAMPING_MASK
) {
633 sock_valbool_flag(sk
, SOCK_TIMESTAMPING_TX_HARDWARE
,
634 val
& SOF_TIMESTAMPING_TX_HARDWARE
);
635 sock_valbool_flag(sk
, SOCK_TIMESTAMPING_TX_SOFTWARE
,
636 val
& SOF_TIMESTAMPING_TX_SOFTWARE
);
637 sock_valbool_flag(sk
, SOCK_TIMESTAMPING_RX_HARDWARE
,
638 val
& SOF_TIMESTAMPING_RX_HARDWARE
);
639 if (val
& SOF_TIMESTAMPING_RX_SOFTWARE
)
640 sock_enable_timestamp(sk
,
641 SOCK_TIMESTAMPING_RX_SOFTWARE
);
643 sock_disable_timestamp(sk
,
644 SOCK_TIMESTAMPING_RX_SOFTWARE
);
645 sock_valbool_flag(sk
, SOCK_TIMESTAMPING_SOFTWARE
,
646 val
& SOF_TIMESTAMPING_SOFTWARE
);
647 sock_valbool_flag(sk
, SOCK_TIMESTAMPING_SYS_HARDWARE
,
648 val
& SOF_TIMESTAMPING_SYS_HARDWARE
);
649 sock_valbool_flag(sk
, SOCK_TIMESTAMPING_RAW_HARDWARE
,
650 val
& SOF_TIMESTAMPING_RAW_HARDWARE
);
656 sk
->sk_rcvlowat
= val
? : 1;
660 ret
= sock_set_timeout(&sk
->sk_rcvtimeo
, optval
, optlen
);
664 ret
= sock_set_timeout(&sk
->sk_sndtimeo
, optval
, optlen
);
667 case SO_ATTACH_FILTER
:
669 if (optlen
== sizeof(struct sock_fprog
)) {
670 struct sock_fprog fprog
;
673 if (copy_from_user(&fprog
, optval
, sizeof(fprog
)))
676 ret
= sk_attach_filter(&fprog
, sk
);
680 case SO_DETACH_FILTER
:
681 ret
= sk_detach_filter(sk
);
686 set_bit(SOCK_PASSSEC
, &sock
->flags
);
688 clear_bit(SOCK_PASSSEC
, &sock
->flags
);
691 if (!capable(CAP_NET_ADMIN
))
698 /* We implement the SO_SNDLOWAT etc to
699 not be settable (1003.1g 5.3) */
709 int sock_getsockopt(struct socket
*sock
, int level
, int optname
,
710 char __user
*optval
, int __user
*optlen
)
712 struct sock
*sk
= sock
->sk
;
720 unsigned int lv
= sizeof(int);
723 if (get_user(len
, optlen
))
732 v
.val
= sock_flag(sk
, SOCK_DBG
);
736 v
.val
= sock_flag(sk
, SOCK_LOCALROUTE
);
740 v
.val
= !!sock_flag(sk
, SOCK_BROADCAST
);
744 v
.val
= sk
->sk_sndbuf
;
748 v
.val
= sk
->sk_rcvbuf
;
752 v
.val
= sk
->sk_reuse
;
756 v
.val
= !!sock_flag(sk
, SOCK_KEEPOPEN
);
764 v
.val
= -sock_error(sk
);
766 v
.val
= xchg(&sk
->sk_err_soft
, 0);
770 v
.val
= !!sock_flag(sk
, SOCK_URGINLINE
);
774 v
.val
= sk
->sk_no_check
;
778 v
.val
= sk
->sk_priority
;
783 v
.ling
.l_onoff
= !!sock_flag(sk
, SOCK_LINGER
);
784 v
.ling
.l_linger
= sk
->sk_lingertime
/ HZ
;
788 sock_warn_obsolete_bsdism("getsockopt");
792 v
.val
= sock_flag(sk
, SOCK_RCVTSTAMP
) &&
793 !sock_flag(sk
, SOCK_RCVTSTAMPNS
);
797 v
.val
= sock_flag(sk
, SOCK_RCVTSTAMPNS
);
800 case SO_TIMESTAMPING
:
802 if (sock_flag(sk
, SOCK_TIMESTAMPING_TX_HARDWARE
))
803 v
.val
|= SOF_TIMESTAMPING_TX_HARDWARE
;
804 if (sock_flag(sk
, SOCK_TIMESTAMPING_TX_SOFTWARE
))
805 v
.val
|= SOF_TIMESTAMPING_TX_SOFTWARE
;
806 if (sock_flag(sk
, SOCK_TIMESTAMPING_RX_HARDWARE
))
807 v
.val
|= SOF_TIMESTAMPING_RX_HARDWARE
;
808 if (sock_flag(sk
, SOCK_TIMESTAMPING_RX_SOFTWARE
))
809 v
.val
|= SOF_TIMESTAMPING_RX_SOFTWARE
;
810 if (sock_flag(sk
, SOCK_TIMESTAMPING_SOFTWARE
))
811 v
.val
|= SOF_TIMESTAMPING_SOFTWARE
;
812 if (sock_flag(sk
, SOCK_TIMESTAMPING_SYS_HARDWARE
))
813 v
.val
|= SOF_TIMESTAMPING_SYS_HARDWARE
;
814 if (sock_flag(sk
, SOCK_TIMESTAMPING_RAW_HARDWARE
))
815 v
.val
|= SOF_TIMESTAMPING_RAW_HARDWARE
;
819 lv
=sizeof(struct timeval
);
820 if (sk
->sk_rcvtimeo
== MAX_SCHEDULE_TIMEOUT
) {
824 v
.tm
.tv_sec
= sk
->sk_rcvtimeo
/ HZ
;
825 v
.tm
.tv_usec
= ((sk
->sk_rcvtimeo
% HZ
) * 1000000) / HZ
;
830 lv
=sizeof(struct timeval
);
831 if (sk
->sk_sndtimeo
== MAX_SCHEDULE_TIMEOUT
) {
835 v
.tm
.tv_sec
= sk
->sk_sndtimeo
/ HZ
;
836 v
.tm
.tv_usec
= ((sk
->sk_sndtimeo
% HZ
) * 1000000) / HZ
;
841 v
.val
= sk
->sk_rcvlowat
;
849 v
.val
= test_bit(SOCK_PASSCRED
, &sock
->flags
) ? 1 : 0;
853 if (len
> sizeof(sk
->sk_peercred
))
854 len
= sizeof(sk
->sk_peercred
);
855 if (copy_to_user(optval
, &sk
->sk_peercred
, len
))
863 if (sock
->ops
->getname(sock
, (struct sockaddr
*)address
, &lv
, 2))
867 if (copy_to_user(optval
, address
, len
))
872 /* Dubious BSD thing... Probably nobody even uses it, but
873 * the UNIX standard wants it for whatever reason... -DaveM
876 v
.val
= sk
->sk_state
== TCP_LISTEN
;
880 v
.val
= test_bit(SOCK_PASSSEC
, &sock
->flags
) ? 1 : 0;
884 return security_socket_getpeersec_stream(sock
, optval
, optlen
, len
);
896 if (copy_to_user(optval
, &v
, len
))
899 if (put_user(len
, optlen
))
905 * Initialize an sk_lock.
907 * (We also register the sk_lock with the lock validator.)
909 static inline void sock_lock_init(struct sock
*sk
)
911 sock_lock_init_class_and_name(sk
,
912 af_family_slock_key_strings
[sk
->sk_family
],
913 af_family_slock_keys
+ sk
->sk_family
,
914 af_family_key_strings
[sk
->sk_family
],
915 af_family_keys
+ sk
->sk_family
);
918 static void sock_copy(struct sock
*nsk
, const struct sock
*osk
)
920 #ifdef CONFIG_SECURITY_NETWORK
921 void *sptr
= nsk
->sk_security
;
924 memcpy(nsk
, osk
, osk
->sk_prot
->obj_size
);
925 #ifdef CONFIG_SECURITY_NETWORK
926 nsk
->sk_security
= sptr
;
927 security_sk_clone(osk
, nsk
);
931 static struct sock
*sk_prot_alloc(struct proto
*prot
, gfp_t priority
,
935 struct kmem_cache
*slab
;
939 sk
= kmem_cache_alloc(slab
, priority
);
941 sk
= kmalloc(prot
->obj_size
, priority
);
944 if (security_sk_alloc(sk
, family
, priority
))
947 if (!try_module_get(prot
->owner
))
954 security_sk_free(sk
);
957 kmem_cache_free(slab
, sk
);
963 static void sk_prot_free(struct proto
*prot
, struct sock
*sk
)
965 struct kmem_cache
*slab
;
966 struct module
*owner
;
971 security_sk_free(sk
);
973 kmem_cache_free(slab
, sk
);
980 * sk_alloc - All socket objects are allocated here
981 * @net: the applicable net namespace
982 * @family: protocol family
983 * @priority: for allocation (%GFP_KERNEL, %GFP_ATOMIC, etc)
984 * @prot: struct proto associated with this new sock instance
986 struct sock
*sk_alloc(struct net
*net
, int family
, gfp_t priority
,
991 sk
= sk_prot_alloc(prot
, priority
| __GFP_ZERO
, family
);
993 sk
->sk_family
= family
;
995 * See comment in struct sock definition to understand
996 * why we need sk_prot_creator -acme
998 sk
->sk_prot
= sk
->sk_prot_creator
= prot
;
1000 sock_net_set(sk
, get_net(net
));
1006 void sk_free(struct sock
*sk
)
1008 struct sk_filter
*filter
;
1010 if (sk
->sk_destruct
)
1011 sk
->sk_destruct(sk
);
1013 filter
= rcu_dereference(sk
->sk_filter
);
1015 sk_filter_uncharge(sk
, filter
);
1016 rcu_assign_pointer(sk
->sk_filter
, NULL
);
1019 sock_disable_timestamp(sk
, SOCK_TIMESTAMP
);
1020 sock_disable_timestamp(sk
, SOCK_TIMESTAMPING_RX_SOFTWARE
);
1022 if (atomic_read(&sk
->sk_omem_alloc
))
1023 printk(KERN_DEBUG
"%s: optmem leakage (%d bytes) detected.\n",
1024 __func__
, atomic_read(&sk
->sk_omem_alloc
));
1026 put_net(sock_net(sk
));
1027 sk_prot_free(sk
->sk_prot_creator
, sk
);
1031 * Last sock_put should drop referrence to sk->sk_net. It has already
1032 * been dropped in sk_change_net. Taking referrence to stopping namespace
1034 * Take referrence to a socket to remove it from hash _alive_ and after that
1035 * destroy it in the context of init_net.
1037 void sk_release_kernel(struct sock
*sk
)
1039 if (sk
== NULL
|| sk
->sk_socket
== NULL
)
1043 sock_release(sk
->sk_socket
);
1044 release_net(sock_net(sk
));
1045 sock_net_set(sk
, get_net(&init_net
));
1048 EXPORT_SYMBOL(sk_release_kernel
);
1050 struct sock
*sk_clone(const struct sock
*sk
, const gfp_t priority
)
1054 newsk
= sk_prot_alloc(sk
->sk_prot
, priority
, sk
->sk_family
);
1055 if (newsk
!= NULL
) {
1056 struct sk_filter
*filter
;
1058 sock_copy(newsk
, sk
);
1061 get_net(sock_net(newsk
));
1062 sk_node_init(&newsk
->sk_node
);
1063 sock_lock_init(newsk
);
1064 bh_lock_sock(newsk
);
1065 newsk
->sk_backlog
.head
= newsk
->sk_backlog
.tail
= NULL
;
1067 atomic_set(&newsk
->sk_rmem_alloc
, 0);
1068 atomic_set(&newsk
->sk_wmem_alloc
, 0);
1069 atomic_set(&newsk
->sk_omem_alloc
, 0);
1070 skb_queue_head_init(&newsk
->sk_receive_queue
);
1071 skb_queue_head_init(&newsk
->sk_write_queue
);
1072 #ifdef CONFIG_NET_DMA
1073 skb_queue_head_init(&newsk
->sk_async_wait_queue
);
1076 rwlock_init(&newsk
->sk_dst_lock
);
1077 rwlock_init(&newsk
->sk_callback_lock
);
1078 lockdep_set_class_and_name(&newsk
->sk_callback_lock
,
1079 af_callback_keys
+ newsk
->sk_family
,
1080 af_family_clock_key_strings
[newsk
->sk_family
]);
1082 newsk
->sk_dst_cache
= NULL
;
1083 newsk
->sk_wmem_queued
= 0;
1084 newsk
->sk_forward_alloc
= 0;
1085 newsk
->sk_send_head
= NULL
;
1086 newsk
->sk_userlocks
= sk
->sk_userlocks
& ~SOCK_BINDPORT_LOCK
;
1088 sock_reset_flag(newsk
, SOCK_DONE
);
1089 skb_queue_head_init(&newsk
->sk_error_queue
);
1091 filter
= newsk
->sk_filter
;
1093 sk_filter_charge(newsk
, filter
);
1095 if (unlikely(xfrm_sk_clone_policy(newsk
))) {
1096 /* It is still raw copy of parent, so invalidate
1097 * destructor and make plain sk_free() */
1098 newsk
->sk_destruct
= NULL
;
1105 newsk
->sk_priority
= 0;
1106 atomic_set(&newsk
->sk_refcnt
, 2);
1109 * Increment the counter in the same struct proto as the master
1110 * sock (sk_refcnt_debug_inc uses newsk->sk_prot->socks, that
1111 * is the same as sk->sk_prot->socks, as this field was copied
1114 * This _changes_ the previous behaviour, where
1115 * tcp_create_openreq_child always was incrementing the
1116 * equivalent to tcp_prot->socks (inet_sock_nr), so this have
1117 * to be taken into account in all callers. -acme
1119 sk_refcnt_debug_inc(newsk
);
1120 sk_set_socket(newsk
, NULL
);
1121 newsk
->sk_sleep
= NULL
;
1123 if (newsk
->sk_prot
->sockets_allocated
)
1124 percpu_counter_inc(newsk
->sk_prot
->sockets_allocated
);
1130 EXPORT_SYMBOL_GPL(sk_clone
);
1132 void sk_setup_caps(struct sock
*sk
, struct dst_entry
*dst
)
1134 __sk_dst_set(sk
, dst
);
1135 sk
->sk_route_caps
= dst
->dev
->features
;
1136 if (sk
->sk_route_caps
& NETIF_F_GSO
)
1137 sk
->sk_route_caps
|= NETIF_F_GSO_SOFTWARE
;
1138 if (sk_can_gso(sk
)) {
1139 if (dst
->header_len
) {
1140 sk
->sk_route_caps
&= ~NETIF_F_GSO_MASK
;
1142 sk
->sk_route_caps
|= NETIF_F_SG
| NETIF_F_HW_CSUM
;
1143 sk
->sk_gso_max_size
= dst
->dev
->gso_max_size
;
1147 EXPORT_SYMBOL_GPL(sk_setup_caps
);
1149 void __init
sk_init(void)
1151 if (num_physpages
<= 4096) {
1152 sysctl_wmem_max
= 32767;
1153 sysctl_rmem_max
= 32767;
1154 sysctl_wmem_default
= 32767;
1155 sysctl_rmem_default
= 32767;
1156 } else if (num_physpages
>= 131072) {
1157 sysctl_wmem_max
= 131071;
1158 sysctl_rmem_max
= 131071;
1163 * Simple resource managers for sockets.
1168 * Write buffer destructor automatically called from kfree_skb.
1170 void sock_wfree(struct sk_buff
*skb
)
1172 struct sock
*sk
= skb
->sk
;
1174 /* In case it might be waiting for more memory. */
1175 atomic_sub(skb
->truesize
, &sk
->sk_wmem_alloc
);
1176 if (!sock_flag(sk
, SOCK_USE_WRITE_QUEUE
))
1177 sk
->sk_write_space(sk
);
1182 * Read buffer destructor automatically called from kfree_skb.
1184 void sock_rfree(struct sk_buff
*skb
)
1186 struct sock
*sk
= skb
->sk
;
1188 skb_truesize_check(skb
);
1189 atomic_sub(skb
->truesize
, &sk
->sk_rmem_alloc
);
1190 sk_mem_uncharge(skb
->sk
, skb
->truesize
);
1194 int sock_i_uid(struct sock
*sk
)
1198 read_lock(&sk
->sk_callback_lock
);
1199 uid
= sk
->sk_socket
? SOCK_INODE(sk
->sk_socket
)->i_uid
: 0;
1200 read_unlock(&sk
->sk_callback_lock
);
1204 unsigned long sock_i_ino(struct sock
*sk
)
1208 read_lock(&sk
->sk_callback_lock
);
1209 ino
= sk
->sk_socket
? SOCK_INODE(sk
->sk_socket
)->i_ino
: 0;
1210 read_unlock(&sk
->sk_callback_lock
);
1215 * Allocate a skb from the socket's send buffer.
1217 struct sk_buff
*sock_wmalloc(struct sock
*sk
, unsigned long size
, int force
,
1220 if (force
|| atomic_read(&sk
->sk_wmem_alloc
) < sk
->sk_sndbuf
) {
1221 struct sk_buff
* skb
= alloc_skb(size
, priority
);
1223 skb_set_owner_w(skb
, sk
);
1231 * Allocate a skb from the socket's receive buffer.
1233 struct sk_buff
*sock_rmalloc(struct sock
*sk
, unsigned long size
, int force
,
1236 if (force
|| atomic_read(&sk
->sk_rmem_alloc
) < sk
->sk_rcvbuf
) {
1237 struct sk_buff
*skb
= alloc_skb(size
, priority
);
1239 skb_set_owner_r(skb
, sk
);
1247 * Allocate a memory block from the socket's option memory buffer.
1249 void *sock_kmalloc(struct sock
*sk
, int size
, gfp_t priority
)
1251 if ((unsigned)size
<= sysctl_optmem_max
&&
1252 atomic_read(&sk
->sk_omem_alloc
) + size
< sysctl_optmem_max
) {
1254 /* First do the add, to avoid the race if kmalloc
1257 atomic_add(size
, &sk
->sk_omem_alloc
);
1258 mem
= kmalloc(size
, priority
);
1261 atomic_sub(size
, &sk
->sk_omem_alloc
);
1267 * Free an option memory block.
1269 void sock_kfree_s(struct sock
*sk
, void *mem
, int size
)
1272 atomic_sub(size
, &sk
->sk_omem_alloc
);
1275 /* It is almost wait_for_tcp_memory minus release_sock/lock_sock.
1276 I think, these locks should be removed for datagram sockets.
1278 static long sock_wait_for_wmem(struct sock
* sk
, long timeo
)
1282 clear_bit(SOCK_ASYNC_NOSPACE
, &sk
->sk_socket
->flags
);
1286 if (signal_pending(current
))
1288 set_bit(SOCK_NOSPACE
, &sk
->sk_socket
->flags
);
1289 prepare_to_wait(sk
->sk_sleep
, &wait
, TASK_INTERRUPTIBLE
);
1290 if (atomic_read(&sk
->sk_wmem_alloc
) < sk
->sk_sndbuf
)
1292 if (sk
->sk_shutdown
& SEND_SHUTDOWN
)
1296 timeo
= schedule_timeout(timeo
);
1298 finish_wait(sk
->sk_sleep
, &wait
);
1304 * Generic send/receive buffer handlers
1307 struct sk_buff
*sock_alloc_send_pskb(struct sock
*sk
, unsigned long header_len
,
1308 unsigned long data_len
, int noblock
,
1311 struct sk_buff
*skb
;
1316 gfp_mask
= sk
->sk_allocation
;
1317 if (gfp_mask
& __GFP_WAIT
)
1318 gfp_mask
|= __GFP_REPEAT
;
1320 timeo
= sock_sndtimeo(sk
, noblock
);
1322 err
= sock_error(sk
);
1327 if (sk
->sk_shutdown
& SEND_SHUTDOWN
)
1330 if (atomic_read(&sk
->sk_wmem_alloc
) < sk
->sk_sndbuf
) {
1331 skb
= alloc_skb(header_len
, gfp_mask
);
1336 /* No pages, we're done... */
1340 npages
= (data_len
+ (PAGE_SIZE
- 1)) >> PAGE_SHIFT
;
1341 skb
->truesize
+= data_len
;
1342 skb_shinfo(skb
)->nr_frags
= npages
;
1343 for (i
= 0; i
< npages
; i
++) {
1347 page
= alloc_pages(sk
->sk_allocation
, 0);
1350 skb_shinfo(skb
)->nr_frags
= i
;
1355 frag
= &skb_shinfo(skb
)->frags
[i
];
1357 frag
->page_offset
= 0;
1358 frag
->size
= (data_len
>= PAGE_SIZE
?
1361 data_len
-= PAGE_SIZE
;
1364 /* Full success... */
1370 set_bit(SOCK_ASYNC_NOSPACE
, &sk
->sk_socket
->flags
);
1371 set_bit(SOCK_NOSPACE
, &sk
->sk_socket
->flags
);
1375 if (signal_pending(current
))
1377 timeo
= sock_wait_for_wmem(sk
, timeo
);
1380 skb_set_owner_w(skb
, sk
);
1384 err
= sock_intr_errno(timeo
);
1389 EXPORT_SYMBOL(sock_alloc_send_pskb
);
1391 struct sk_buff
*sock_alloc_send_skb(struct sock
*sk
, unsigned long size
,
1392 int noblock
, int *errcode
)
1394 return sock_alloc_send_pskb(sk
, size
, 0, noblock
, errcode
);
1397 static void __lock_sock(struct sock
*sk
)
1402 prepare_to_wait_exclusive(&sk
->sk_lock
.wq
, &wait
,
1403 TASK_UNINTERRUPTIBLE
);
1404 spin_unlock_bh(&sk
->sk_lock
.slock
);
1406 spin_lock_bh(&sk
->sk_lock
.slock
);
1407 if (!sock_owned_by_user(sk
))
1410 finish_wait(&sk
->sk_lock
.wq
, &wait
);
1413 static void __release_sock(struct sock
*sk
)
1415 struct sk_buff
*skb
= sk
->sk_backlog
.head
;
1418 sk
->sk_backlog
.head
= sk
->sk_backlog
.tail
= NULL
;
1422 struct sk_buff
*next
= skb
->next
;
1425 sk_backlog_rcv(sk
, skb
);
1428 * We are in process context here with softirqs
1429 * disabled, use cond_resched_softirq() to preempt.
1430 * This is safe to do because we've taken the backlog
1433 cond_resched_softirq();
1436 } while (skb
!= NULL
);
1439 } while ((skb
= sk
->sk_backlog
.head
) != NULL
);
1443 * sk_wait_data - wait for data to arrive at sk_receive_queue
1444 * @sk: sock to wait on
1445 * @timeo: for how long
1447 * Now socket state including sk->sk_err is changed only under lock,
1448 * hence we may omit checks after joining wait queue.
1449 * We check receive queue before schedule() only as optimization;
1450 * it is very likely that release_sock() added new data.
1452 int sk_wait_data(struct sock
*sk
, long *timeo
)
1457 prepare_to_wait(sk
->sk_sleep
, &wait
, TASK_INTERRUPTIBLE
);
1458 set_bit(SOCK_ASYNC_WAITDATA
, &sk
->sk_socket
->flags
);
1459 rc
= sk_wait_event(sk
, timeo
, !skb_queue_empty(&sk
->sk_receive_queue
));
1460 clear_bit(SOCK_ASYNC_WAITDATA
, &sk
->sk_socket
->flags
);
1461 finish_wait(sk
->sk_sleep
, &wait
);
1465 EXPORT_SYMBOL(sk_wait_data
);
1468 * __sk_mem_schedule - increase sk_forward_alloc and memory_allocated
1470 * @size: memory size to allocate
1471 * @kind: allocation type
1473 * If kind is SK_MEM_SEND, it means wmem allocation. Otherwise it means
1474 * rmem allocation. This function assumes that protocols which have
1475 * memory_pressure use sk_wmem_queued as write buffer accounting.
1477 int __sk_mem_schedule(struct sock
*sk
, int size
, int kind
)
1479 struct proto
*prot
= sk
->sk_prot
;
1480 int amt
= sk_mem_pages(size
);
1483 sk
->sk_forward_alloc
+= amt
* SK_MEM_QUANTUM
;
1484 allocated
= atomic_add_return(amt
, prot
->memory_allocated
);
1487 if (allocated
<= prot
->sysctl_mem
[0]) {
1488 if (prot
->memory_pressure
&& *prot
->memory_pressure
)
1489 *prot
->memory_pressure
= 0;
1493 /* Under pressure. */
1494 if (allocated
> prot
->sysctl_mem
[1])
1495 if (prot
->enter_memory_pressure
)
1496 prot
->enter_memory_pressure(sk
);
1498 /* Over hard limit. */
1499 if (allocated
> prot
->sysctl_mem
[2])
1500 goto suppress_allocation
;
1502 /* guarantee minimum buffer size under pressure */
1503 if (kind
== SK_MEM_RECV
) {
1504 if (atomic_read(&sk
->sk_rmem_alloc
) < prot
->sysctl_rmem
[0])
1506 } else { /* SK_MEM_SEND */
1507 if (sk
->sk_type
== SOCK_STREAM
) {
1508 if (sk
->sk_wmem_queued
< prot
->sysctl_wmem
[0])
1510 } else if (atomic_read(&sk
->sk_wmem_alloc
) <
1511 prot
->sysctl_wmem
[0])
1515 if (prot
->memory_pressure
) {
1518 if (!*prot
->memory_pressure
)
1520 alloc
= percpu_counter_read_positive(prot
->sockets_allocated
);
1521 if (prot
->sysctl_mem
[2] > alloc
*
1522 sk_mem_pages(sk
->sk_wmem_queued
+
1523 atomic_read(&sk
->sk_rmem_alloc
) +
1524 sk
->sk_forward_alloc
))
1528 suppress_allocation
:
1530 if (kind
== SK_MEM_SEND
&& sk
->sk_type
== SOCK_STREAM
) {
1531 sk_stream_moderate_sndbuf(sk
);
1533 /* Fail only if socket is _under_ its sndbuf.
1534 * In this case we cannot block, so that we have to fail.
1536 if (sk
->sk_wmem_queued
+ size
>= sk
->sk_sndbuf
)
1540 /* Alas. Undo changes. */
1541 sk
->sk_forward_alloc
-= amt
* SK_MEM_QUANTUM
;
1542 atomic_sub(amt
, prot
->memory_allocated
);
1546 EXPORT_SYMBOL(__sk_mem_schedule
);
1549 * __sk_reclaim - reclaim memory_allocated
1552 void __sk_mem_reclaim(struct sock
*sk
)
1554 struct proto
*prot
= sk
->sk_prot
;
1556 atomic_sub(sk
->sk_forward_alloc
>> SK_MEM_QUANTUM_SHIFT
,
1557 prot
->memory_allocated
);
1558 sk
->sk_forward_alloc
&= SK_MEM_QUANTUM
- 1;
1560 if (prot
->memory_pressure
&& *prot
->memory_pressure
&&
1561 (atomic_read(prot
->memory_allocated
) < prot
->sysctl_mem
[0]))
1562 *prot
->memory_pressure
= 0;
1565 EXPORT_SYMBOL(__sk_mem_reclaim
);
1569 * Set of default routines for initialising struct proto_ops when
1570 * the protocol does not support a particular function. In certain
1571 * cases where it makes no sense for a protocol to have a "do nothing"
1572 * function, some default processing is provided.
1575 int sock_no_bind(struct socket
*sock
, struct sockaddr
*saddr
, int len
)
1580 int sock_no_connect(struct socket
*sock
, struct sockaddr
*saddr
,
1586 int sock_no_socketpair(struct socket
*sock1
, struct socket
*sock2
)
1591 int sock_no_accept(struct socket
*sock
, struct socket
*newsock
, int flags
)
1596 int sock_no_getname(struct socket
*sock
, struct sockaddr
*saddr
,
1602 unsigned int sock_no_poll(struct file
* file
, struct socket
*sock
, poll_table
*pt
)
1607 int sock_no_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
1612 int sock_no_listen(struct socket
*sock
, int backlog
)
1617 int sock_no_shutdown(struct socket
*sock
, int how
)
1622 int sock_no_setsockopt(struct socket
*sock
, int level
, int optname
,
1623 char __user
*optval
, int optlen
)
1628 int sock_no_getsockopt(struct socket
*sock
, int level
, int optname
,
1629 char __user
*optval
, int __user
*optlen
)
1634 int sock_no_sendmsg(struct kiocb
*iocb
, struct socket
*sock
, struct msghdr
*m
,
1640 int sock_no_recvmsg(struct kiocb
*iocb
, struct socket
*sock
, struct msghdr
*m
,
1641 size_t len
, int flags
)
1646 int sock_no_mmap(struct file
*file
, struct socket
*sock
, struct vm_area_struct
*vma
)
1648 /* Mirror missing mmap method error code */
1652 ssize_t
sock_no_sendpage(struct socket
*sock
, struct page
*page
, int offset
, size_t size
, int flags
)
1655 struct msghdr msg
= {.msg_flags
= flags
};
1657 char *kaddr
= kmap(page
);
1658 iov
.iov_base
= kaddr
+ offset
;
1660 res
= kernel_sendmsg(sock
, &msg
, &iov
, 1, size
);
1666 * Default Socket Callbacks
1669 static void sock_def_wakeup(struct sock
*sk
)
1671 read_lock(&sk
->sk_callback_lock
);
1672 if (sk
->sk_sleep
&& waitqueue_active(sk
->sk_sleep
))
1673 wake_up_interruptible_all(sk
->sk_sleep
);
1674 read_unlock(&sk
->sk_callback_lock
);
1677 static void sock_def_error_report(struct sock
*sk
)
1679 read_lock(&sk
->sk_callback_lock
);
1680 if (sk
->sk_sleep
&& waitqueue_active(sk
->sk_sleep
))
1681 wake_up_interruptible(sk
->sk_sleep
);
1682 sk_wake_async(sk
, SOCK_WAKE_IO
, POLL_ERR
);
1683 read_unlock(&sk
->sk_callback_lock
);
1686 static void sock_def_readable(struct sock
*sk
, int len
)
1688 read_lock(&sk
->sk_callback_lock
);
1689 if (sk
->sk_sleep
&& waitqueue_active(sk
->sk_sleep
))
1690 wake_up_interruptible_sync(sk
->sk_sleep
);
1691 sk_wake_async(sk
, SOCK_WAKE_WAITD
, POLL_IN
);
1692 read_unlock(&sk
->sk_callback_lock
);
1695 static void sock_def_write_space(struct sock
*sk
)
1697 read_lock(&sk
->sk_callback_lock
);
1699 /* Do not wake up a writer until he can make "significant"
1702 if ((atomic_read(&sk
->sk_wmem_alloc
) << 1) <= sk
->sk_sndbuf
) {
1703 if (sk
->sk_sleep
&& waitqueue_active(sk
->sk_sleep
))
1704 wake_up_interruptible_sync(sk
->sk_sleep
);
1706 /* Should agree with poll, otherwise some programs break */
1707 if (sock_writeable(sk
))
1708 sk_wake_async(sk
, SOCK_WAKE_SPACE
, POLL_OUT
);
1711 read_unlock(&sk
->sk_callback_lock
);
1714 static void sock_def_destruct(struct sock
*sk
)
1716 kfree(sk
->sk_protinfo
);
1719 void sk_send_sigurg(struct sock
*sk
)
1721 if (sk
->sk_socket
&& sk
->sk_socket
->file
)
1722 if (send_sigurg(&sk
->sk_socket
->file
->f_owner
))
1723 sk_wake_async(sk
, SOCK_WAKE_URG
, POLL_PRI
);
1726 void sk_reset_timer(struct sock
*sk
, struct timer_list
* timer
,
1727 unsigned long expires
)
1729 if (!mod_timer(timer
, expires
))
1733 EXPORT_SYMBOL(sk_reset_timer
);
1735 void sk_stop_timer(struct sock
*sk
, struct timer_list
* timer
)
1737 if (timer_pending(timer
) && del_timer(timer
))
1741 EXPORT_SYMBOL(sk_stop_timer
);
1743 void sock_init_data(struct socket
*sock
, struct sock
*sk
)
1745 skb_queue_head_init(&sk
->sk_receive_queue
);
1746 skb_queue_head_init(&sk
->sk_write_queue
);
1747 skb_queue_head_init(&sk
->sk_error_queue
);
1748 #ifdef CONFIG_NET_DMA
1749 skb_queue_head_init(&sk
->sk_async_wait_queue
);
1752 sk
->sk_send_head
= NULL
;
1754 init_timer(&sk
->sk_timer
);
1756 sk
->sk_allocation
= GFP_KERNEL
;
1757 sk
->sk_rcvbuf
= sysctl_rmem_default
;
1758 sk
->sk_sndbuf
= sysctl_wmem_default
;
1759 sk
->sk_state
= TCP_CLOSE
;
1760 sk_set_socket(sk
, sock
);
1762 sock_set_flag(sk
, SOCK_ZAPPED
);
1765 sk
->sk_type
= sock
->type
;
1766 sk
->sk_sleep
= &sock
->wait
;
1769 sk
->sk_sleep
= NULL
;
1771 rwlock_init(&sk
->sk_dst_lock
);
1772 rwlock_init(&sk
->sk_callback_lock
);
1773 lockdep_set_class_and_name(&sk
->sk_callback_lock
,
1774 af_callback_keys
+ sk
->sk_family
,
1775 af_family_clock_key_strings
[sk
->sk_family
]);
1777 sk
->sk_state_change
= sock_def_wakeup
;
1778 sk
->sk_data_ready
= sock_def_readable
;
1779 sk
->sk_write_space
= sock_def_write_space
;
1780 sk
->sk_error_report
= sock_def_error_report
;
1781 sk
->sk_destruct
= sock_def_destruct
;
1783 sk
->sk_sndmsg_page
= NULL
;
1784 sk
->sk_sndmsg_off
= 0;
1786 sk
->sk_peercred
.pid
= 0;
1787 sk
->sk_peercred
.uid
= -1;
1788 sk
->sk_peercred
.gid
= -1;
1789 sk
->sk_write_pending
= 0;
1790 sk
->sk_rcvlowat
= 1;
1791 sk
->sk_rcvtimeo
= MAX_SCHEDULE_TIMEOUT
;
1792 sk
->sk_sndtimeo
= MAX_SCHEDULE_TIMEOUT
;
1794 sk
->sk_stamp
= ktime_set(-1L, 0);
1796 atomic_set(&sk
->sk_refcnt
, 1);
1797 atomic_set(&sk
->sk_drops
, 0);
1800 void lock_sock_nested(struct sock
*sk
, int subclass
)
1803 spin_lock_bh(&sk
->sk_lock
.slock
);
1804 if (sk
->sk_lock
.owned
)
1806 sk
->sk_lock
.owned
= 1;
1807 spin_unlock(&sk
->sk_lock
.slock
);
1809 * The sk_lock has mutex_lock() semantics here:
1811 mutex_acquire(&sk
->sk_lock
.dep_map
, subclass
, 0, _RET_IP_
);
1815 EXPORT_SYMBOL(lock_sock_nested
);
1817 void release_sock(struct sock
*sk
)
1820 * The sk_lock has mutex_unlock() semantics:
1822 mutex_release(&sk
->sk_lock
.dep_map
, 1, _RET_IP_
);
1824 spin_lock_bh(&sk
->sk_lock
.slock
);
1825 if (sk
->sk_backlog
.tail
)
1827 sk
->sk_lock
.owned
= 0;
1828 if (waitqueue_active(&sk
->sk_lock
.wq
))
1829 wake_up(&sk
->sk_lock
.wq
);
1830 spin_unlock_bh(&sk
->sk_lock
.slock
);
1832 EXPORT_SYMBOL(release_sock
);
1834 int sock_get_timestamp(struct sock
*sk
, struct timeval __user
*userstamp
)
1837 if (!sock_flag(sk
, SOCK_TIMESTAMP
))
1838 sock_enable_timestamp(sk
, SOCK_TIMESTAMP
);
1839 tv
= ktime_to_timeval(sk
->sk_stamp
);
1840 if (tv
.tv_sec
== -1)
1842 if (tv
.tv_sec
== 0) {
1843 sk
->sk_stamp
= ktime_get_real();
1844 tv
= ktime_to_timeval(sk
->sk_stamp
);
1846 return copy_to_user(userstamp
, &tv
, sizeof(tv
)) ? -EFAULT
: 0;
1848 EXPORT_SYMBOL(sock_get_timestamp
);
1850 int sock_get_timestampns(struct sock
*sk
, struct timespec __user
*userstamp
)
1853 if (!sock_flag(sk
, SOCK_TIMESTAMP
))
1854 sock_enable_timestamp(sk
, SOCK_TIMESTAMP
);
1855 ts
= ktime_to_timespec(sk
->sk_stamp
);
1856 if (ts
.tv_sec
== -1)
1858 if (ts
.tv_sec
== 0) {
1859 sk
->sk_stamp
= ktime_get_real();
1860 ts
= ktime_to_timespec(sk
->sk_stamp
);
1862 return copy_to_user(userstamp
, &ts
, sizeof(ts
)) ? -EFAULT
: 0;
1864 EXPORT_SYMBOL(sock_get_timestampns
);
1866 void sock_enable_timestamp(struct sock
*sk
, int flag
)
1868 if (!sock_flag(sk
, flag
)) {
1869 sock_set_flag(sk
, flag
);
1871 * we just set one of the two flags which require net
1872 * time stamping, but time stamping might have been on
1873 * already because of the other one
1876 flag
== SOCK_TIMESTAMP
?
1877 SOCK_TIMESTAMPING_RX_SOFTWARE
:
1879 net_enable_timestamp();
1884 * Get a socket option on an socket.
1886 * FIX: POSIX 1003.1g is very ambiguous here. It states that
1887 * asynchronous errors should be reported by getsockopt. We assume
1888 * this means if you specify SO_ERROR (otherwise whats the point of it).
1890 int sock_common_getsockopt(struct socket
*sock
, int level
, int optname
,
1891 char __user
*optval
, int __user
*optlen
)
1893 struct sock
*sk
= sock
->sk
;
1895 return sk
->sk_prot
->getsockopt(sk
, level
, optname
, optval
, optlen
);
1898 EXPORT_SYMBOL(sock_common_getsockopt
);
1900 #ifdef CONFIG_COMPAT
1901 int compat_sock_common_getsockopt(struct socket
*sock
, int level
, int optname
,
1902 char __user
*optval
, int __user
*optlen
)
1904 struct sock
*sk
= sock
->sk
;
1906 if (sk
->sk_prot
->compat_getsockopt
!= NULL
)
1907 return sk
->sk_prot
->compat_getsockopt(sk
, level
, optname
,
1909 return sk
->sk_prot
->getsockopt(sk
, level
, optname
, optval
, optlen
);
1911 EXPORT_SYMBOL(compat_sock_common_getsockopt
);
1914 int sock_common_recvmsg(struct kiocb
*iocb
, struct socket
*sock
,
1915 struct msghdr
*msg
, size_t size
, int flags
)
1917 struct sock
*sk
= sock
->sk
;
1921 err
= sk
->sk_prot
->recvmsg(iocb
, sk
, msg
, size
, flags
& MSG_DONTWAIT
,
1922 flags
& ~MSG_DONTWAIT
, &addr_len
);
1924 msg
->msg_namelen
= addr_len
;
1928 EXPORT_SYMBOL(sock_common_recvmsg
);
1931 * Set socket options on an inet socket.
1933 int sock_common_setsockopt(struct socket
*sock
, int level
, int optname
,
1934 char __user
*optval
, int optlen
)
1936 struct sock
*sk
= sock
->sk
;
1938 return sk
->sk_prot
->setsockopt(sk
, level
, optname
, optval
, optlen
);
1941 EXPORT_SYMBOL(sock_common_setsockopt
);
1943 #ifdef CONFIG_COMPAT
1944 int compat_sock_common_setsockopt(struct socket
*sock
, int level
, int optname
,
1945 char __user
*optval
, int optlen
)
1947 struct sock
*sk
= sock
->sk
;
1949 if (sk
->sk_prot
->compat_setsockopt
!= NULL
)
1950 return sk
->sk_prot
->compat_setsockopt(sk
, level
, optname
,
1952 return sk
->sk_prot
->setsockopt(sk
, level
, optname
, optval
, optlen
);
1954 EXPORT_SYMBOL(compat_sock_common_setsockopt
);
1957 void sk_common_release(struct sock
*sk
)
1959 if (sk
->sk_prot
->destroy
)
1960 sk
->sk_prot
->destroy(sk
);
1963 * Observation: when sock_common_release is called, processes have
1964 * no access to socket. But net still has.
1965 * Step one, detach it from networking:
1967 * A. Remove from hash tables.
1970 sk
->sk_prot
->unhash(sk
);
1973 * In this point socket cannot receive new packets, but it is possible
1974 * that some packets are in flight because some CPU runs receiver and
1975 * did hash table lookup before we unhashed socket. They will achieve
1976 * receive queue and will be purged by socket destructor.
1978 * Also we still have packets pending on receive queue and probably,
1979 * our own packets waiting in device queues. sock_destroy will drain
1980 * receive queue, but transmitted packets will delay socket destruction
1981 * until the last reference will be released.
1986 xfrm_sk_free_policy(sk
);
1988 sk_refcnt_debug_release(sk
);
1992 EXPORT_SYMBOL(sk_common_release
);
1994 static DEFINE_RWLOCK(proto_list_lock
);
1995 static LIST_HEAD(proto_list
);
1997 #ifdef CONFIG_PROC_FS
1998 #define PROTO_INUSE_NR 64 /* should be enough for the first time */
2000 int val
[PROTO_INUSE_NR
];
2003 static DECLARE_BITMAP(proto_inuse_idx
, PROTO_INUSE_NR
);
2005 #ifdef CONFIG_NET_NS
2006 void sock_prot_inuse_add(struct net
*net
, struct proto
*prot
, int val
)
2008 int cpu
= smp_processor_id();
2009 per_cpu_ptr(net
->core
.inuse
, cpu
)->val
[prot
->inuse_idx
] += val
;
2011 EXPORT_SYMBOL_GPL(sock_prot_inuse_add
);
2013 int sock_prot_inuse_get(struct net
*net
, struct proto
*prot
)
2015 int cpu
, idx
= prot
->inuse_idx
;
2018 for_each_possible_cpu(cpu
)
2019 res
+= per_cpu_ptr(net
->core
.inuse
, cpu
)->val
[idx
];
2021 return res
>= 0 ? res
: 0;
2023 EXPORT_SYMBOL_GPL(sock_prot_inuse_get
);
2025 static int sock_inuse_init_net(struct net
*net
)
2027 net
->core
.inuse
= alloc_percpu(struct prot_inuse
);
2028 return net
->core
.inuse
? 0 : -ENOMEM
;
2031 static void sock_inuse_exit_net(struct net
*net
)
2033 free_percpu(net
->core
.inuse
);
2036 static struct pernet_operations net_inuse_ops
= {
2037 .init
= sock_inuse_init_net
,
2038 .exit
= sock_inuse_exit_net
,
2041 static __init
int net_inuse_init(void)
2043 if (register_pernet_subsys(&net_inuse_ops
))
2044 panic("Cannot initialize net inuse counters");
2049 core_initcall(net_inuse_init
);
2051 static DEFINE_PER_CPU(struct prot_inuse
, prot_inuse
);
2053 void sock_prot_inuse_add(struct net
*net
, struct proto
*prot
, int val
)
2055 __get_cpu_var(prot_inuse
).val
[prot
->inuse_idx
] += val
;
2057 EXPORT_SYMBOL_GPL(sock_prot_inuse_add
);
2059 int sock_prot_inuse_get(struct net
*net
, struct proto
*prot
)
2061 int cpu
, idx
= prot
->inuse_idx
;
2064 for_each_possible_cpu(cpu
)
2065 res
+= per_cpu(prot_inuse
, cpu
).val
[idx
];
2067 return res
>= 0 ? res
: 0;
2069 EXPORT_SYMBOL_GPL(sock_prot_inuse_get
);
2072 static void assign_proto_idx(struct proto
*prot
)
2074 prot
->inuse_idx
= find_first_zero_bit(proto_inuse_idx
, PROTO_INUSE_NR
);
2076 if (unlikely(prot
->inuse_idx
== PROTO_INUSE_NR
- 1)) {
2077 printk(KERN_ERR
"PROTO_INUSE_NR exhausted\n");
2081 set_bit(prot
->inuse_idx
, proto_inuse_idx
);
2084 static void release_proto_idx(struct proto
*prot
)
2086 if (prot
->inuse_idx
!= PROTO_INUSE_NR
- 1)
2087 clear_bit(prot
->inuse_idx
, proto_inuse_idx
);
2090 static inline void assign_proto_idx(struct proto
*prot
)
2094 static inline void release_proto_idx(struct proto
*prot
)
2099 int proto_register(struct proto
*prot
, int alloc_slab
)
2102 prot
->slab
= kmem_cache_create(prot
->name
, prot
->obj_size
, 0,
2103 SLAB_HWCACHE_ALIGN
| prot
->slab_flags
,
2106 if (prot
->slab
== NULL
) {
2107 printk(KERN_CRIT
"%s: Can't create sock SLAB cache!\n",
2112 if (prot
->rsk_prot
!= NULL
) {
2113 static const char mask
[] = "request_sock_%s";
2115 prot
->rsk_prot
->slab_name
= kmalloc(strlen(prot
->name
) + sizeof(mask
) - 1, GFP_KERNEL
);
2116 if (prot
->rsk_prot
->slab_name
== NULL
)
2117 goto out_free_sock_slab
;
2119 sprintf(prot
->rsk_prot
->slab_name
, mask
, prot
->name
);
2120 prot
->rsk_prot
->slab
= kmem_cache_create(prot
->rsk_prot
->slab_name
,
2121 prot
->rsk_prot
->obj_size
, 0,
2122 SLAB_HWCACHE_ALIGN
, NULL
);
2124 if (prot
->rsk_prot
->slab
== NULL
) {
2125 printk(KERN_CRIT
"%s: Can't create request sock SLAB cache!\n",
2127 goto out_free_request_sock_slab_name
;
2131 if (prot
->twsk_prot
!= NULL
) {
2132 static const char mask
[] = "tw_sock_%s";
2134 prot
->twsk_prot
->twsk_slab_name
= kmalloc(strlen(prot
->name
) + sizeof(mask
) - 1, GFP_KERNEL
);
2136 if (prot
->twsk_prot
->twsk_slab_name
== NULL
)
2137 goto out_free_request_sock_slab
;
2139 sprintf(prot
->twsk_prot
->twsk_slab_name
, mask
, prot
->name
);
2140 prot
->twsk_prot
->twsk_slab
=
2141 kmem_cache_create(prot
->twsk_prot
->twsk_slab_name
,
2142 prot
->twsk_prot
->twsk_obj_size
,
2144 SLAB_HWCACHE_ALIGN
|
2147 if (prot
->twsk_prot
->twsk_slab
== NULL
)
2148 goto out_free_timewait_sock_slab_name
;
2152 write_lock(&proto_list_lock
);
2153 list_add(&prot
->node
, &proto_list
);
2154 assign_proto_idx(prot
);
2155 write_unlock(&proto_list_lock
);
2158 out_free_timewait_sock_slab_name
:
2159 kfree(prot
->twsk_prot
->twsk_slab_name
);
2160 out_free_request_sock_slab
:
2161 if (prot
->rsk_prot
&& prot
->rsk_prot
->slab
) {
2162 kmem_cache_destroy(prot
->rsk_prot
->slab
);
2163 prot
->rsk_prot
->slab
= NULL
;
2165 out_free_request_sock_slab_name
:
2166 kfree(prot
->rsk_prot
->slab_name
);
2168 kmem_cache_destroy(prot
->slab
);
2174 EXPORT_SYMBOL(proto_register
);
2176 void proto_unregister(struct proto
*prot
)
2178 write_lock(&proto_list_lock
);
2179 release_proto_idx(prot
);
2180 list_del(&prot
->node
);
2181 write_unlock(&proto_list_lock
);
2183 if (prot
->slab
!= NULL
) {
2184 kmem_cache_destroy(prot
->slab
);
2188 if (prot
->rsk_prot
!= NULL
&& prot
->rsk_prot
->slab
!= NULL
) {
2189 kmem_cache_destroy(prot
->rsk_prot
->slab
);
2190 kfree(prot
->rsk_prot
->slab_name
);
2191 prot
->rsk_prot
->slab
= NULL
;
2194 if (prot
->twsk_prot
!= NULL
&& prot
->twsk_prot
->twsk_slab
!= NULL
) {
2195 kmem_cache_destroy(prot
->twsk_prot
->twsk_slab
);
2196 kfree(prot
->twsk_prot
->twsk_slab_name
);
2197 prot
->twsk_prot
->twsk_slab
= NULL
;
2201 EXPORT_SYMBOL(proto_unregister
);
2203 #ifdef CONFIG_PROC_FS
2204 static void *proto_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2205 __acquires(proto_list_lock
)
2207 read_lock(&proto_list_lock
);
2208 return seq_list_start_head(&proto_list
, *pos
);
2211 static void *proto_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2213 return seq_list_next(v
, &proto_list
, pos
);
2216 static void proto_seq_stop(struct seq_file
*seq
, void *v
)
2217 __releases(proto_list_lock
)
2219 read_unlock(&proto_list_lock
);
2222 static char proto_method_implemented(const void *method
)
2224 return method
== NULL
? 'n' : 'y';
2227 static void proto_seq_printf(struct seq_file
*seq
, struct proto
*proto
)
2229 seq_printf(seq
, "%-9s %4u %6d %6d %-3s %6u %-3s %-10s "
2230 "%2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c\n",
2233 sock_prot_inuse_get(seq_file_net(seq
), proto
),
2234 proto
->memory_allocated
!= NULL
? atomic_read(proto
->memory_allocated
) : -1,
2235 proto
->memory_pressure
!= NULL
? *proto
->memory_pressure
? "yes" : "no" : "NI",
2237 proto
->slab
== NULL
? "no" : "yes",
2238 module_name(proto
->owner
),
2239 proto_method_implemented(proto
->close
),
2240 proto_method_implemented(proto
->connect
),
2241 proto_method_implemented(proto
->disconnect
),
2242 proto_method_implemented(proto
->accept
),
2243 proto_method_implemented(proto
->ioctl
),
2244 proto_method_implemented(proto
->init
),
2245 proto_method_implemented(proto
->destroy
),
2246 proto_method_implemented(proto
->shutdown
),
2247 proto_method_implemented(proto
->setsockopt
),
2248 proto_method_implemented(proto
->getsockopt
),
2249 proto_method_implemented(proto
->sendmsg
),
2250 proto_method_implemented(proto
->recvmsg
),
2251 proto_method_implemented(proto
->sendpage
),
2252 proto_method_implemented(proto
->bind
),
2253 proto_method_implemented(proto
->backlog_rcv
),
2254 proto_method_implemented(proto
->hash
),
2255 proto_method_implemented(proto
->unhash
),
2256 proto_method_implemented(proto
->get_port
),
2257 proto_method_implemented(proto
->enter_memory_pressure
));
2260 static int proto_seq_show(struct seq_file
*seq
, void *v
)
2262 if (v
== &proto_list
)
2263 seq_printf(seq
, "%-9s %-4s %-8s %-6s %-5s %-7s %-4s %-10s %s",
2272 "cl co di ac io in de sh ss gs se re sp bi br ha uh gp em\n");
2274 proto_seq_printf(seq
, list_entry(v
, struct proto
, node
));
2278 static const struct seq_operations proto_seq_ops
= {
2279 .start
= proto_seq_start
,
2280 .next
= proto_seq_next
,
2281 .stop
= proto_seq_stop
,
2282 .show
= proto_seq_show
,
2285 static int proto_seq_open(struct inode
*inode
, struct file
*file
)
2287 return seq_open_net(inode
, file
, &proto_seq_ops
,
2288 sizeof(struct seq_net_private
));
2291 static const struct file_operations proto_seq_fops
= {
2292 .owner
= THIS_MODULE
,
2293 .open
= proto_seq_open
,
2295 .llseek
= seq_lseek
,
2296 .release
= seq_release_net
,
2299 static __net_init
int proto_init_net(struct net
*net
)
2301 if (!proc_net_fops_create(net
, "protocols", S_IRUGO
, &proto_seq_fops
))
2307 static __net_exit
void proto_exit_net(struct net
*net
)
2309 proc_net_remove(net
, "protocols");
2313 static __net_initdata
struct pernet_operations proto_net_ops
= {
2314 .init
= proto_init_net
,
2315 .exit
= proto_exit_net
,
2318 static int __init
proto_init(void)
2320 return register_pernet_subsys(&proto_net_ops
);
2323 subsys_initcall(proto_init
);
2325 #endif /* PROC_FS */
2327 EXPORT_SYMBOL(sk_alloc
);
2328 EXPORT_SYMBOL(sk_free
);
2329 EXPORT_SYMBOL(sk_send_sigurg
);
2330 EXPORT_SYMBOL(sock_alloc_send_skb
);
2331 EXPORT_SYMBOL(sock_init_data
);
2332 EXPORT_SYMBOL(sock_kfree_s
);
2333 EXPORT_SYMBOL(sock_kmalloc
);
2334 EXPORT_SYMBOL(sock_no_accept
);
2335 EXPORT_SYMBOL(sock_no_bind
);
2336 EXPORT_SYMBOL(sock_no_connect
);
2337 EXPORT_SYMBOL(sock_no_getname
);
2338 EXPORT_SYMBOL(sock_no_getsockopt
);
2339 EXPORT_SYMBOL(sock_no_ioctl
);
2340 EXPORT_SYMBOL(sock_no_listen
);
2341 EXPORT_SYMBOL(sock_no_mmap
);
2342 EXPORT_SYMBOL(sock_no_poll
);
2343 EXPORT_SYMBOL(sock_no_recvmsg
);
2344 EXPORT_SYMBOL(sock_no_sendmsg
);
2345 EXPORT_SYMBOL(sock_no_sendpage
);
2346 EXPORT_SYMBOL(sock_no_setsockopt
);
2347 EXPORT_SYMBOL(sock_no_shutdown
);
2348 EXPORT_SYMBOL(sock_no_socketpair
);
2349 EXPORT_SYMBOL(sock_rfree
);
2350 EXPORT_SYMBOL(sock_setsockopt
);
2351 EXPORT_SYMBOL(sock_wfree
);
2352 EXPORT_SYMBOL(sock_wmalloc
);
2353 EXPORT_SYMBOL(sock_i_uid
);
2354 EXPORT_SYMBOL(sock_i_ino
);
2355 EXPORT_SYMBOL(sysctl_optmem_max
);