3 * Copyright (C) 1992 Krishna Balasubramanian
5 * Removed all the remaining kerneld mess
6 * Catch the -EFAULT stuff properly
7 * Use GFP_KERNEL for messages as in 1.2
8 * Fixed up the unchecked user space derefs
9 * Copyright (C) 1998 Alan Cox & Andi Kleen
11 * /proc/sysvipc/msg support (c) 1999 Dragos Acostachioaie <dragos@iname.com>
13 * mostly rewritten, threaded and wake-one semantics added
14 * MSGMAX limit removed, sysctl's added
15 * (c) 1999 Manfred Spraul <manfred@colorfullife.com>
17 * support for audit of ipc object properties and permission changes
18 * Dustin Kirkland <dustin.kirkland@us.ibm.com>
22 * Pavel Emelianov <xemul@openvz.org>
25 #include <linux/capability.h>
26 #include <linux/slab.h>
27 #include <linux/msg.h>
28 #include <linux/spinlock.h>
29 #include <linux/init.h>
30 #include <linux/proc_fs.h>
31 #include <linux/list.h>
32 #include <linux/security.h>
33 #include <linux/sched.h>
34 #include <linux/syscalls.h>
35 #include <linux/audit.h>
36 #include <linux/seq_file.h>
37 #include <linux/rwsem.h>
38 #include <linux/nsproxy.h>
39 #include <linux/ipc_namespace.h>
41 #include <asm/current.h>
42 #include <asm/uaccess.h>
46 * one msg_receiver structure for each sleeping receiver:
49 struct list_head r_list
;
50 struct task_struct
*r_tsk
;
56 struct msg_msg
*volatile r_msg
;
59 /* one msg_sender for each sleeping sender */
61 struct list_head list
;
62 struct task_struct
*tsk
;
66 #define SEARCH_EQUAL 2
67 #define SEARCH_NOTEQUAL 3
68 #define SEARCH_LESSEQUAL 4
70 #define msg_ids(ns) ((ns)->ids[IPC_MSG_IDS])
72 #define msg_unlock(msq) ipc_unlock(&(msq)->q_perm)
74 static void freeque(struct ipc_namespace
*, struct kern_ipc_perm
*);
75 static int newque(struct ipc_namespace
*, struct ipc_params
*);
77 static int sysvipc_msg_proc_show(struct seq_file
*s
, void *it
);
80 void msg_init_ns(struct ipc_namespace
*ns
)
82 ns
->msg_ctlmax
= MSGMAX
;
83 ns
->msg_ctlmnb
= MSGMNB
;
84 ns
->msg_ctlmni
= MSGMNI
;
85 atomic_set(&ns
->msg_bytes
, 0);
86 atomic_set(&ns
->msg_hdrs
, 0);
87 ipc_init_ids(&ns
->ids
[IPC_MSG_IDS
]);
91 void msg_exit_ns(struct ipc_namespace
*ns
)
93 free_ipcs(ns
, &msg_ids(ns
), freeque
);
97 void __init
msg_init(void)
99 msg_init_ns(&init_ipc_ns
);
100 ipc_init_proc_interface("sysvipc/msg",
101 " key msqid perms cbytes qnum lspid lrpid uid gid cuid cgid stime rtime ctime\n",
102 IPC_MSG_IDS
, sysvipc_msg_proc_show
);
106 * This routine is called in the paths where the rw_mutex is held to protect
107 * access to the idr tree.
109 static inline struct msg_queue
*msg_lock_check_down(struct ipc_namespace
*ns
,
112 struct kern_ipc_perm
*ipcp
= ipc_lock_check_down(&msg_ids(ns
), id
);
115 return (struct msg_queue
*)ipcp
;
117 return container_of(ipcp
, struct msg_queue
, q_perm
);
121 * msg_lock_(check_) routines are called in the paths where the rw_mutex
124 static inline struct msg_queue
*msg_lock(struct ipc_namespace
*ns
, int id
)
126 struct kern_ipc_perm
*ipcp
= ipc_lock(&msg_ids(ns
), id
);
129 return (struct msg_queue
*)ipcp
;
131 return container_of(ipcp
, struct msg_queue
, q_perm
);
134 static inline struct msg_queue
*msg_lock_check(struct ipc_namespace
*ns
,
137 struct kern_ipc_perm
*ipcp
= ipc_lock_check(&msg_ids(ns
), id
);
140 return (struct msg_queue
*)ipcp
;
142 return container_of(ipcp
, struct msg_queue
, q_perm
);
145 static inline void msg_rmid(struct ipc_namespace
*ns
, struct msg_queue
*s
)
147 ipc_rmid(&msg_ids(ns
), &s
->q_perm
);
151 * newque - Create a new msg queue
153 * @params: ptr to the structure that contains the key and msgflg
155 * Called with msg_ids.rw_mutex held (writer)
157 static int newque(struct ipc_namespace
*ns
, struct ipc_params
*params
)
159 struct msg_queue
*msq
;
161 key_t key
= params
->key
;
162 int msgflg
= params
->flg
;
164 msq
= ipc_rcu_alloc(sizeof(*msq
));
168 msq
->q_perm
.mode
= msgflg
& S_IRWXUGO
;
169 msq
->q_perm
.key
= key
;
171 msq
->q_perm
.security
= NULL
;
172 retval
= security_msg_queue_alloc(msq
);
179 * ipc_addid() locks msq
181 id
= ipc_addid(&msg_ids(ns
), &msq
->q_perm
, ns
->msg_ctlmni
);
183 security_msg_queue_free(msq
);
188 msq
->q_stime
= msq
->q_rtime
= 0;
189 msq
->q_ctime
= get_seconds();
190 msq
->q_cbytes
= msq
->q_qnum
= 0;
191 msq
->q_qbytes
= ns
->msg_ctlmnb
;
192 msq
->q_lspid
= msq
->q_lrpid
= 0;
193 INIT_LIST_HEAD(&msq
->q_messages
);
194 INIT_LIST_HEAD(&msq
->q_receivers
);
195 INIT_LIST_HEAD(&msq
->q_senders
);
199 return msq
->q_perm
.id
;
202 static inline void ss_add(struct msg_queue
*msq
, struct msg_sender
*mss
)
205 current
->state
= TASK_INTERRUPTIBLE
;
206 list_add_tail(&mss
->list
, &msq
->q_senders
);
209 static inline void ss_del(struct msg_sender
*mss
)
211 if (mss
->list
.next
!= NULL
)
212 list_del(&mss
->list
);
215 static void ss_wakeup(struct list_head
*h
, int kill
)
217 struct list_head
*tmp
;
221 struct msg_sender
*mss
;
223 mss
= list_entry(tmp
, struct msg_sender
, list
);
226 mss
->list
.next
= NULL
;
227 wake_up_process(mss
->tsk
);
231 static void expunge_all(struct msg_queue
*msq
, int res
)
233 struct list_head
*tmp
;
235 tmp
= msq
->q_receivers
.next
;
236 while (tmp
!= &msq
->q_receivers
) {
237 struct msg_receiver
*msr
;
239 msr
= list_entry(tmp
, struct msg_receiver
, r_list
);
242 wake_up_process(msr
->r_tsk
);
244 msr
->r_msg
= ERR_PTR(res
);
249 * freeque() wakes up waiters on the sender and receiver waiting queue,
250 * removes the message queue from message queue ID IDR, and cleans up all the
251 * messages associated with this queue.
253 * msg_ids.rw_mutex (writer) and the spinlock for this message queue are held
254 * before freeque() is called. msg_ids.rw_mutex remains locked on exit.
256 static void freeque(struct ipc_namespace
*ns
, struct kern_ipc_perm
*ipcp
)
258 struct list_head
*tmp
;
259 struct msg_queue
*msq
= container_of(ipcp
, struct msg_queue
, q_perm
);
261 expunge_all(msq
, -EIDRM
);
262 ss_wakeup(&msq
->q_senders
, 1);
266 tmp
= msq
->q_messages
.next
;
267 while (tmp
!= &msq
->q_messages
) {
268 struct msg_msg
*msg
= list_entry(tmp
, struct msg_msg
, m_list
);
271 atomic_dec(&ns
->msg_hdrs
);
274 atomic_sub(msq
->q_cbytes
, &ns
->msg_bytes
);
275 security_msg_queue_free(msq
);
280 * Called with msg_ids.rw_mutex and ipcp locked.
282 static inline int msg_security(struct kern_ipc_perm
*ipcp
, int msgflg
)
284 struct msg_queue
*msq
= container_of(ipcp
, struct msg_queue
, q_perm
);
286 return security_msg_queue_associate(msq
, msgflg
);
289 asmlinkage
long sys_msgget(key_t key
, int msgflg
)
291 struct ipc_namespace
*ns
;
292 struct ipc_ops msg_ops
;
293 struct ipc_params msg_params
;
295 ns
= current
->nsproxy
->ipc_ns
;
297 msg_ops
.getnew
= newque
;
298 msg_ops
.associate
= msg_security
;
299 msg_ops
.more_checks
= NULL
;
301 msg_params
.key
= key
;
302 msg_params
.flg
= msgflg
;
304 return ipcget(ns
, &msg_ids(ns
), &msg_ops
, &msg_params
);
307 static inline unsigned long
308 copy_msqid_to_user(void __user
*buf
, struct msqid64_ds
*in
, int version
)
312 return copy_to_user(buf
, in
, sizeof(*in
));
317 memset(&out
, 0, sizeof(out
));
319 ipc64_perm_to_ipc_perm(&in
->msg_perm
, &out
.msg_perm
);
321 out
.msg_stime
= in
->msg_stime
;
322 out
.msg_rtime
= in
->msg_rtime
;
323 out
.msg_ctime
= in
->msg_ctime
;
325 if (in
->msg_cbytes
> USHRT_MAX
)
326 out
.msg_cbytes
= USHRT_MAX
;
328 out
.msg_cbytes
= in
->msg_cbytes
;
329 out
.msg_lcbytes
= in
->msg_cbytes
;
331 if (in
->msg_qnum
> USHRT_MAX
)
332 out
.msg_qnum
= USHRT_MAX
;
334 out
.msg_qnum
= in
->msg_qnum
;
336 if (in
->msg_qbytes
> USHRT_MAX
)
337 out
.msg_qbytes
= USHRT_MAX
;
339 out
.msg_qbytes
= in
->msg_qbytes
;
340 out
.msg_lqbytes
= in
->msg_qbytes
;
342 out
.msg_lspid
= in
->msg_lspid
;
343 out
.msg_lrpid
= in
->msg_lrpid
;
345 return copy_to_user(buf
, &out
, sizeof(out
));
353 unsigned long qbytes
;
359 static inline unsigned long
360 copy_msqid_from_user(struct msq_setbuf
*out
, void __user
*buf
, int version
)
365 struct msqid64_ds tbuf
;
367 if (copy_from_user(&tbuf
, buf
, sizeof(tbuf
)))
370 out
->qbytes
= tbuf
.msg_qbytes
;
371 out
->uid
= tbuf
.msg_perm
.uid
;
372 out
->gid
= tbuf
.msg_perm
.gid
;
373 out
->mode
= tbuf
.msg_perm
.mode
;
379 struct msqid_ds tbuf_old
;
381 if (copy_from_user(&tbuf_old
, buf
, sizeof(tbuf_old
)))
384 out
->uid
= tbuf_old
.msg_perm
.uid
;
385 out
->gid
= tbuf_old
.msg_perm
.gid
;
386 out
->mode
= tbuf_old
.msg_perm
.mode
;
388 if (tbuf_old
.msg_qbytes
== 0)
389 out
->qbytes
= tbuf_old
.msg_lqbytes
;
391 out
->qbytes
= tbuf_old
.msg_qbytes
;
400 asmlinkage
long sys_msgctl(int msqid
, int cmd
, struct msqid_ds __user
*buf
)
402 struct kern_ipc_perm
*ipcp
;
403 struct msq_setbuf
uninitialized_var(setbuf
);
404 struct msg_queue
*msq
;
406 struct ipc_namespace
*ns
;
408 if (msqid
< 0 || cmd
< 0)
411 version
= ipc_parse_version(&cmd
);
412 ns
= current
->nsproxy
->ipc_ns
;
418 struct msginfo msginfo
;
424 * We must not return kernel stack data.
425 * due to padding, it's not enough
426 * to set all member fields.
428 err
= security_msg_queue_msgctl(NULL
, cmd
);
432 memset(&msginfo
, 0, sizeof(msginfo
));
433 msginfo
.msgmni
= ns
->msg_ctlmni
;
434 msginfo
.msgmax
= ns
->msg_ctlmax
;
435 msginfo
.msgmnb
= ns
->msg_ctlmnb
;
436 msginfo
.msgssz
= MSGSSZ
;
437 msginfo
.msgseg
= MSGSEG
;
438 down_read(&msg_ids(ns
).rw_mutex
);
439 if (cmd
== MSG_INFO
) {
440 msginfo
.msgpool
= msg_ids(ns
).in_use
;
441 msginfo
.msgmap
= atomic_read(&ns
->msg_hdrs
);
442 msginfo
.msgtql
= atomic_read(&ns
->msg_bytes
);
444 msginfo
.msgmap
= MSGMAP
;
445 msginfo
.msgpool
= MSGPOOL
;
446 msginfo
.msgtql
= MSGTQL
;
448 max_id
= ipc_get_maxid(&msg_ids(ns
));
449 up_read(&msg_ids(ns
).rw_mutex
);
450 if (copy_to_user(buf
, &msginfo
, sizeof(struct msginfo
)))
452 return (max_id
< 0) ? 0 : max_id
;
454 case MSG_STAT
: /* msqid is an index rather than a msg queue id */
457 struct msqid64_ds tbuf
;
463 if (cmd
== MSG_STAT
) {
464 msq
= msg_lock(ns
, msqid
);
467 success_return
= msq
->q_perm
.id
;
469 msq
= msg_lock_check(ns
, msqid
);
475 if (ipcperms(&msq
->q_perm
, S_IRUGO
))
478 err
= security_msg_queue_msgctl(msq
, cmd
);
482 memset(&tbuf
, 0, sizeof(tbuf
));
484 kernel_to_ipc64_perm(&msq
->q_perm
, &tbuf
.msg_perm
);
485 tbuf
.msg_stime
= msq
->q_stime
;
486 tbuf
.msg_rtime
= msq
->q_rtime
;
487 tbuf
.msg_ctime
= msq
->q_ctime
;
488 tbuf
.msg_cbytes
= msq
->q_cbytes
;
489 tbuf
.msg_qnum
= msq
->q_qnum
;
490 tbuf
.msg_qbytes
= msq
->q_qbytes
;
491 tbuf
.msg_lspid
= msq
->q_lspid
;
492 tbuf
.msg_lrpid
= msq
->q_lrpid
;
494 if (copy_msqid_to_user(buf
, &tbuf
, version
))
496 return success_return
;
501 if (copy_msqid_from_user(&setbuf
, buf
, version
))
510 down_write(&msg_ids(ns
).rw_mutex
);
511 msq
= msg_lock_check_down(ns
, msqid
);
519 err
= audit_ipc_obj(ipcp
);
522 if (cmd
== IPC_SET
) {
523 err
= audit_ipc_set_perm(setbuf
.qbytes
, setbuf
.uid
, setbuf
.gid
,
530 if (current
->euid
!= ipcp
->cuid
&&
531 current
->euid
!= ipcp
->uid
&& !capable(CAP_SYS_ADMIN
))
532 /* We _could_ check for CAP_CHOWN above, but we don't */
535 err
= security_msg_queue_msgctl(msq
, cmd
);
543 if (setbuf
.qbytes
> ns
->msg_ctlmnb
&& !capable(CAP_SYS_RESOURCE
))
546 msq
->q_qbytes
= setbuf
.qbytes
;
548 ipcp
->uid
= setbuf
.uid
;
549 ipcp
->gid
= setbuf
.gid
;
550 ipcp
->mode
= (ipcp
->mode
& ~S_IRWXUGO
) |
551 (S_IRWXUGO
& setbuf
.mode
);
552 msq
->q_ctime
= get_seconds();
553 /* sleeping receivers might be excluded by
554 * stricter permissions.
556 expunge_all(msq
, -EAGAIN
);
557 /* sleeping senders might be able to send
558 * due to a larger queue size.
560 ss_wakeup(&msq
->q_senders
, 0);
565 freeque(ns
, &msq
->q_perm
);
570 up_write(&msg_ids(ns
).rw_mutex
);
580 static int testmsg(struct msg_msg
*msg
, long type
, int mode
)
586 case SEARCH_LESSEQUAL
:
587 if (msg
->m_type
<=type
)
591 if (msg
->m_type
== type
)
594 case SEARCH_NOTEQUAL
:
595 if (msg
->m_type
!= type
)
602 static inline int pipelined_send(struct msg_queue
*msq
, struct msg_msg
*msg
)
604 struct list_head
*tmp
;
606 tmp
= msq
->q_receivers
.next
;
607 while (tmp
!= &msq
->q_receivers
) {
608 struct msg_receiver
*msr
;
610 msr
= list_entry(tmp
, struct msg_receiver
, r_list
);
612 if (testmsg(msg
, msr
->r_msgtype
, msr
->r_mode
) &&
613 !security_msg_queue_msgrcv(msq
, msg
, msr
->r_tsk
,
614 msr
->r_msgtype
, msr
->r_mode
)) {
616 list_del(&msr
->r_list
);
617 if (msr
->r_maxsize
< msg
->m_ts
) {
619 wake_up_process(msr
->r_tsk
);
621 msr
->r_msg
= ERR_PTR(-E2BIG
);
624 msq
->q_lrpid
= task_pid_vnr(msr
->r_tsk
);
625 msq
->q_rtime
= get_seconds();
626 wake_up_process(msr
->r_tsk
);
637 long do_msgsnd(int msqid
, long mtype
, void __user
*mtext
,
638 size_t msgsz
, int msgflg
)
640 struct msg_queue
*msq
;
643 struct ipc_namespace
*ns
;
645 ns
= current
->nsproxy
->ipc_ns
;
647 if (msgsz
> ns
->msg_ctlmax
|| (long) msgsz
< 0 || msqid
< 0)
652 msg
= load_msg(mtext
, msgsz
);
659 msq
= msg_lock_check(ns
, msqid
);
669 if (ipcperms(&msq
->q_perm
, S_IWUGO
))
670 goto out_unlock_free
;
672 err
= security_msg_queue_msgsnd(msq
, msg
, msgflg
);
674 goto out_unlock_free
;
676 if (msgsz
+ msq
->q_cbytes
<= msq
->q_qbytes
&&
677 1 + msq
->q_qnum
<= msq
->q_qbytes
) {
681 /* queue full, wait: */
682 if (msgflg
& IPC_NOWAIT
) {
684 goto out_unlock_free
;
691 ipc_lock_by_ptr(&msq
->q_perm
);
693 if (msq
->q_perm
.deleted
) {
695 goto out_unlock_free
;
699 if (signal_pending(current
)) {
700 err
= -ERESTARTNOHAND
;
701 goto out_unlock_free
;
705 msq
->q_lspid
= task_tgid_vnr(current
);
706 msq
->q_stime
= get_seconds();
708 if (!pipelined_send(msq
, msg
)) {
709 /* noone is waiting for this message, enqueue it */
710 list_add_tail(&msg
->m_list
, &msq
->q_messages
);
711 msq
->q_cbytes
+= msgsz
;
713 atomic_add(msgsz
, &ns
->msg_bytes
);
714 atomic_inc(&ns
->msg_hdrs
);
729 sys_msgsnd(int msqid
, struct msgbuf __user
*msgp
, size_t msgsz
, int msgflg
)
733 if (get_user(mtype
, &msgp
->mtype
))
735 return do_msgsnd(msqid
, mtype
, msgp
->mtext
, msgsz
, msgflg
);
738 static inline int convert_mode(long *msgtyp
, int msgflg
)
741 * find message of correct type.
742 * msgtyp = 0 => get first.
743 * msgtyp > 0 => get first message of matching type.
744 * msgtyp < 0 => get message with least type must be < abs(msgtype).
750 return SEARCH_LESSEQUAL
;
752 if (msgflg
& MSG_EXCEPT
)
753 return SEARCH_NOTEQUAL
;
757 long do_msgrcv(int msqid
, long *pmtype
, void __user
*mtext
,
758 size_t msgsz
, long msgtyp
, int msgflg
)
760 struct msg_queue
*msq
;
763 struct ipc_namespace
*ns
;
765 if (msqid
< 0 || (long) msgsz
< 0)
767 mode
= convert_mode(&msgtyp
, msgflg
);
768 ns
= current
->nsproxy
->ipc_ns
;
770 msq
= msg_lock_check(ns
, msqid
);
775 struct msg_receiver msr_d
;
776 struct list_head
*tmp
;
778 msg
= ERR_PTR(-EACCES
);
779 if (ipcperms(&msq
->q_perm
, S_IRUGO
))
782 msg
= ERR_PTR(-EAGAIN
);
783 tmp
= msq
->q_messages
.next
;
784 while (tmp
!= &msq
->q_messages
) {
785 struct msg_msg
*walk_msg
;
787 walk_msg
= list_entry(tmp
, struct msg_msg
, m_list
);
788 if (testmsg(walk_msg
, msgtyp
, mode
) &&
789 !security_msg_queue_msgrcv(msq
, walk_msg
, current
,
793 if (mode
== SEARCH_LESSEQUAL
&&
794 walk_msg
->m_type
!= 1) {
796 msgtyp
= walk_msg
->m_type
- 1;
806 * Found a suitable message.
807 * Unlink it from the queue.
809 if ((msgsz
< msg
->m_ts
) && !(msgflg
& MSG_NOERROR
)) {
810 msg
= ERR_PTR(-E2BIG
);
813 list_del(&msg
->m_list
);
815 msq
->q_rtime
= get_seconds();
816 msq
->q_lrpid
= task_tgid_vnr(current
);
817 msq
->q_cbytes
-= msg
->m_ts
;
818 atomic_sub(msg
->m_ts
, &ns
->msg_bytes
);
819 atomic_dec(&ns
->msg_hdrs
);
820 ss_wakeup(&msq
->q_senders
, 0);
824 /* No message waiting. Wait for a message */
825 if (msgflg
& IPC_NOWAIT
) {
826 msg
= ERR_PTR(-ENOMSG
);
829 list_add_tail(&msr_d
.r_list
, &msq
->q_receivers
);
830 msr_d
.r_tsk
= current
;
831 msr_d
.r_msgtype
= msgtyp
;
833 if (msgflg
& MSG_NOERROR
)
834 msr_d
.r_maxsize
= INT_MAX
;
836 msr_d
.r_maxsize
= msgsz
;
837 msr_d
.r_msg
= ERR_PTR(-EAGAIN
);
838 current
->state
= TASK_INTERRUPTIBLE
;
843 /* Lockless receive, part 1:
844 * Disable preemption. We don't hold a reference to the queue
845 * and getting a reference would defeat the idea of a lockless
846 * operation, thus the code relies on rcu to guarantee the
848 * Prior to destruction, expunge_all(-EIRDM) changes r_msg.
849 * Thus if r_msg is -EAGAIN, then the queue not yet destroyed.
850 * rcu_read_lock() prevents preemption between reading r_msg
851 * and the spin_lock() inside ipc_lock_by_ptr().
855 /* Lockless receive, part 2:
856 * Wait until pipelined_send or expunge_all are outside of
857 * wake_up_process(). There is a race with exit(), see
858 * ipc/mqueue.c for the details.
860 msg
= (struct msg_msg
*)msr_d
.r_msg
;
861 while (msg
== NULL
) {
863 msg
= (struct msg_msg
*)msr_d
.r_msg
;
866 /* Lockless receive, part 3:
867 * If there is a message or an error then accept it without
870 if (msg
!= ERR_PTR(-EAGAIN
)) {
875 /* Lockless receive, part 3:
876 * Acquire the queue spinlock.
878 ipc_lock_by_ptr(&msq
->q_perm
);
881 /* Lockless receive, part 4:
882 * Repeat test after acquiring the spinlock.
884 msg
= (struct msg_msg
*)msr_d
.r_msg
;
885 if (msg
!= ERR_PTR(-EAGAIN
))
888 list_del(&msr_d
.r_list
);
889 if (signal_pending(current
)) {
890 msg
= ERR_PTR(-ERESTARTNOHAND
);
899 msgsz
= (msgsz
> msg
->m_ts
) ? msg
->m_ts
: msgsz
;
900 *pmtype
= msg
->m_type
;
901 if (store_msg(mtext
, msg
, msgsz
))
909 asmlinkage
long sys_msgrcv(int msqid
, struct msgbuf __user
*msgp
, size_t msgsz
,
910 long msgtyp
, int msgflg
)
914 err
= do_msgrcv(msqid
, &mtype
, msgp
->mtext
, msgsz
, msgtyp
, msgflg
);
918 if (put_user(mtype
, &msgp
->mtype
))
924 #ifdef CONFIG_PROC_FS
925 static int sysvipc_msg_proc_show(struct seq_file
*s
, void *it
)
927 struct msg_queue
*msq
= it
;
930 "%10d %10d %4o %10lu %10lu %5u %5u %5u %5u %5u %5u %10lu %10lu %10lu\n",
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