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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/ipc/msg.c | |
5a06a363 | 3 | * Copyright (C) 1992 Krishna Balasubramanian |
1da177e4 LT |
4 | * |
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 | |
10 | * | |
11 | * /proc/sysvipc/msg support (c) 1999 Dragos Acostachioaie <dragos@iname.com> | |
12 | * | |
13 | * mostly rewritten, threaded and wake-one semantics added | |
14 | * MSGMAX limit removed, sysctl's added | |
624dffcb | 15 | * (c) 1999 Manfred Spraul <manfred@colorfullife.com> |
073115d6 SG |
16 | * |
17 | * support for audit of ipc object properties and permission changes | |
18 | * Dustin Kirkland <dustin.kirkland@us.ibm.com> | |
1e786937 KK |
19 | * |
20 | * namespaces support | |
21 | * OpenVZ, SWsoft Inc. | |
22 | * Pavel Emelianov <xemul@openvz.org> | |
1da177e4 LT |
23 | */ |
24 | ||
c59ede7b | 25 | #include <linux/capability.h> |
1da177e4 LT |
26 | #include <linux/msg.h> |
27 | #include <linux/spinlock.h> | |
28 | #include <linux/init.h> | |
f7bf3df8 | 29 | #include <linux/mm.h> |
1da177e4 LT |
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> | |
19b4946c | 36 | #include <linux/seq_file.h> |
3e148c79 | 37 | #include <linux/rwsem.h> |
1e786937 | 38 | #include <linux/nsproxy.h> |
ae5e1b22 | 39 | #include <linux/ipc_namespace.h> |
5f921ae9 | 40 | |
1da177e4 LT |
41 | #include <asm/current.h> |
42 | #include <asm/uaccess.h> | |
43 | #include "util.h" | |
44 | ||
5a06a363 IM |
45 | /* |
46 | * one msg_receiver structure for each sleeping receiver: | |
47 | */ | |
1da177e4 | 48 | struct msg_receiver { |
5a06a363 IM |
49 | struct list_head r_list; |
50 | struct task_struct *r_tsk; | |
1da177e4 | 51 | |
5a06a363 IM |
52 | int r_mode; |
53 | long r_msgtype; | |
54 | long r_maxsize; | |
1da177e4 | 55 | |
80491eb9 | 56 | struct msg_msg *volatile r_msg; |
1da177e4 LT |
57 | }; |
58 | ||
59 | /* one msg_sender for each sleeping sender */ | |
60 | struct msg_sender { | |
5a06a363 IM |
61 | struct list_head list; |
62 | struct task_struct *tsk; | |
1da177e4 LT |
63 | }; |
64 | ||
65 | #define SEARCH_ANY 1 | |
66 | #define SEARCH_EQUAL 2 | |
67 | #define SEARCH_NOTEQUAL 3 | |
68 | #define SEARCH_LESSEQUAL 4 | |
8ac6ed58 | 69 | #define SEARCH_NUMBER 5 |
1da177e4 | 70 | |
ed2ddbf8 | 71 | #define msg_ids(ns) ((ns)->ids[IPC_MSG_IDS]) |
1da177e4 | 72 | |
1e786937 | 73 | #define msg_unlock(msq) ipc_unlock(&(msq)->q_perm) |
1e786937 | 74 | |
01b8b07a | 75 | static void freeque(struct ipc_namespace *, struct kern_ipc_perm *); |
7748dbfa | 76 | static int newque(struct ipc_namespace *, struct ipc_params *); |
1da177e4 | 77 | #ifdef CONFIG_PROC_FS |
19b4946c | 78 | static int sysvipc_msg_proc_show(struct seq_file *s, void *it); |
1da177e4 LT |
79 | #endif |
80 | ||
f7bf3df8 ND |
81 | /* |
82 | * Scale msgmni with the available lowmem size: the memory dedicated to msg | |
83 | * queues should occupy at most 1/MSG_MEM_SCALE of lowmem. | |
4d89dc6a ND |
84 | * Also take into account the number of nsproxies created so far. |
85 | * This should be done staying within the (MSGMNI , IPCMNI/nr_ipc_ns) range. | |
f7bf3df8 | 86 | */ |
b6b337ad | 87 | void recompute_msgmni(struct ipc_namespace *ns) |
f7bf3df8 ND |
88 | { |
89 | struct sysinfo i; | |
90 | unsigned long allowed; | |
4d89dc6a | 91 | int nb_ns; |
f7bf3df8 ND |
92 | |
93 | si_meminfo(&i); | |
94 | allowed = (((i.totalram - i.totalhigh) / MSG_MEM_SCALE) * i.mem_unit) | |
95 | / MSGMNB; | |
4d89dc6a ND |
96 | nb_ns = atomic_read(&nr_ipc_ns); |
97 | allowed /= nb_ns; | |
f7bf3df8 ND |
98 | |
99 | if (allowed < MSGMNI) { | |
100 | ns->msg_ctlmni = MSGMNI; | |
dfcceb26 | 101 | return; |
f7bf3df8 ND |
102 | } |
103 | ||
4d89dc6a ND |
104 | if (allowed > IPCMNI / nb_ns) { |
105 | ns->msg_ctlmni = IPCMNI / nb_ns; | |
dfcceb26 | 106 | return; |
f7bf3df8 ND |
107 | } |
108 | ||
109 | ns->msg_ctlmni = allowed; | |
f7bf3df8 ND |
110 | } |
111 | ||
ed2ddbf8 | 112 | void msg_init_ns(struct ipc_namespace *ns) |
1e786937 | 113 | { |
1e786937 KK |
114 | ns->msg_ctlmax = MSGMAX; |
115 | ns->msg_ctlmnb = MSGMNB; | |
f7bf3df8 ND |
116 | |
117 | recompute_msgmni(ns); | |
118 | ||
3ac88a41 KK |
119 | atomic_set(&ns->msg_bytes, 0); |
120 | atomic_set(&ns->msg_hdrs, 0); | |
ed2ddbf8 | 121 | ipc_init_ids(&ns->ids[IPC_MSG_IDS]); |
1e786937 KK |
122 | } |
123 | ||
ae5e1b22 | 124 | #ifdef CONFIG_IPC_NS |
1e786937 KK |
125 | void msg_exit_ns(struct ipc_namespace *ns) |
126 | { | |
01b8b07a | 127 | free_ipcs(ns, &msg_ids(ns), freeque); |
7d6feeb2 | 128 | idr_destroy(&ns->ids[IPC_MSG_IDS].ipcs_idr); |
1e786937 | 129 | } |
ae5e1b22 | 130 | #endif |
1e786937 | 131 | |
5a06a363 | 132 | void __init msg_init(void) |
1da177e4 | 133 | { |
ed2ddbf8 | 134 | msg_init_ns(&init_ipc_ns); |
dfcceb26 ND |
135 | |
136 | printk(KERN_INFO "msgmni has been set to %d\n", | |
137 | init_ipc_ns.msg_ctlmni); | |
138 | ||
19b4946c MW |
139 | ipc_init_proc_interface("sysvipc/msg", |
140 | " key msqid perms cbytes qnum lspid lrpid uid gid cuid cgid stime rtime ctime\n", | |
1e786937 | 141 | IPC_MSG_IDS, sysvipc_msg_proc_show); |
1da177e4 LT |
142 | } |
143 | ||
3e148c79 ND |
144 | /* |
145 | * msg_lock_(check_) routines are called in the paths where the rw_mutex | |
146 | * is not held. | |
147 | */ | |
023a5355 ND |
148 | static inline struct msg_queue *msg_lock(struct ipc_namespace *ns, int id) |
149 | { | |
03f02c76 ND |
150 | struct kern_ipc_perm *ipcp = ipc_lock(&msg_ids(ns), id); |
151 | ||
b1ed88b4 PP |
152 | if (IS_ERR(ipcp)) |
153 | return (struct msg_queue *)ipcp; | |
154 | ||
03f02c76 | 155 | return container_of(ipcp, struct msg_queue, q_perm); |
023a5355 ND |
156 | } |
157 | ||
158 | static inline struct msg_queue *msg_lock_check(struct ipc_namespace *ns, | |
159 | int id) | |
160 | { | |
03f02c76 ND |
161 | struct kern_ipc_perm *ipcp = ipc_lock_check(&msg_ids(ns), id); |
162 | ||
b1ed88b4 PP |
163 | if (IS_ERR(ipcp)) |
164 | return (struct msg_queue *)ipcp; | |
165 | ||
03f02c76 | 166 | return container_of(ipcp, struct msg_queue, q_perm); |
023a5355 ND |
167 | } |
168 | ||
7ca7e564 ND |
169 | static inline void msg_rmid(struct ipc_namespace *ns, struct msg_queue *s) |
170 | { | |
171 | ipc_rmid(&msg_ids(ns), &s->q_perm); | |
172 | } | |
173 | ||
f4566f04 ND |
174 | /** |
175 | * newque - Create a new msg queue | |
176 | * @ns: namespace | |
177 | * @params: ptr to the structure that contains the key and msgflg | |
178 | * | |
3e148c79 | 179 | * Called with msg_ids.rw_mutex held (writer) |
f4566f04 | 180 | */ |
7748dbfa | 181 | static int newque(struct ipc_namespace *ns, struct ipc_params *params) |
1da177e4 | 182 | { |
1da177e4 | 183 | struct msg_queue *msq; |
5a06a363 | 184 | int id, retval; |
7748dbfa ND |
185 | key_t key = params->key; |
186 | int msgflg = params->flg; | |
1da177e4 | 187 | |
5a06a363 IM |
188 | msq = ipc_rcu_alloc(sizeof(*msq)); |
189 | if (!msq) | |
1da177e4 LT |
190 | return -ENOMEM; |
191 | ||
5a06a363 | 192 | msq->q_perm.mode = msgflg & S_IRWXUGO; |
1da177e4 LT |
193 | msq->q_perm.key = key; |
194 | ||
195 | msq->q_perm.security = NULL; | |
196 | retval = security_msg_queue_alloc(msq); | |
197 | if (retval) { | |
198 | ipc_rcu_putref(msq); | |
199 | return retval; | |
200 | } | |
201 | ||
7ca7e564 ND |
202 | /* |
203 | * ipc_addid() locks msq | |
204 | */ | |
1e786937 | 205 | id = ipc_addid(&msg_ids(ns), &msq->q_perm, ns->msg_ctlmni); |
283bb7fa | 206 | if (id < 0) { |
1da177e4 LT |
207 | security_msg_queue_free(msq); |
208 | ipc_rcu_putref(msq); | |
283bb7fa | 209 | return id; |
1da177e4 LT |
210 | } |
211 | ||
212 | msq->q_stime = msq->q_rtime = 0; | |
213 | msq->q_ctime = get_seconds(); | |
214 | msq->q_cbytes = msq->q_qnum = 0; | |
1e786937 | 215 | msq->q_qbytes = ns->msg_ctlmnb; |
1da177e4 LT |
216 | msq->q_lspid = msq->q_lrpid = 0; |
217 | INIT_LIST_HEAD(&msq->q_messages); | |
218 | INIT_LIST_HEAD(&msq->q_receivers); | |
219 | INIT_LIST_HEAD(&msq->q_senders); | |
7ca7e564 | 220 | |
1da177e4 LT |
221 | msg_unlock(msq); |
222 | ||
7ca7e564 | 223 | return msq->q_perm.id; |
1da177e4 LT |
224 | } |
225 | ||
5a06a363 | 226 | static inline void ss_add(struct msg_queue *msq, struct msg_sender *mss) |
1da177e4 | 227 | { |
5a06a363 IM |
228 | mss->tsk = current; |
229 | current->state = TASK_INTERRUPTIBLE; | |
230 | list_add_tail(&mss->list, &msq->q_senders); | |
1da177e4 LT |
231 | } |
232 | ||
5a06a363 | 233 | static inline void ss_del(struct msg_sender *mss) |
1da177e4 | 234 | { |
5a06a363 | 235 | if (mss->list.next != NULL) |
1da177e4 LT |
236 | list_del(&mss->list); |
237 | } | |
238 | ||
5a06a363 | 239 | static void ss_wakeup(struct list_head *h, int kill) |
1da177e4 LT |
240 | { |
241 | struct list_head *tmp; | |
242 | ||
243 | tmp = h->next; | |
244 | while (tmp != h) { | |
5a06a363 IM |
245 | struct msg_sender *mss; |
246 | ||
247 | mss = list_entry(tmp, struct msg_sender, list); | |
1da177e4 | 248 | tmp = tmp->next; |
5a06a363 IM |
249 | if (kill) |
250 | mss->list.next = NULL; | |
1da177e4 LT |
251 | wake_up_process(mss->tsk); |
252 | } | |
253 | } | |
254 | ||
5a06a363 | 255 | static void expunge_all(struct msg_queue *msq, int res) |
1da177e4 LT |
256 | { |
257 | struct list_head *tmp; | |
258 | ||
259 | tmp = msq->q_receivers.next; | |
260 | while (tmp != &msq->q_receivers) { | |
5a06a363 IM |
261 | struct msg_receiver *msr; |
262 | ||
263 | msr = list_entry(tmp, struct msg_receiver, r_list); | |
1da177e4 LT |
264 | tmp = tmp->next; |
265 | msr->r_msg = NULL; | |
266 | wake_up_process(msr->r_tsk); | |
267 | smp_mb(); | |
268 | msr->r_msg = ERR_PTR(res); | |
269 | } | |
270 | } | |
5a06a363 IM |
271 | |
272 | /* | |
273 | * freeque() wakes up waiters on the sender and receiver waiting queue, | |
f4566f04 ND |
274 | * removes the message queue from message queue ID IDR, and cleans up all the |
275 | * messages associated with this queue. | |
1da177e4 | 276 | * |
3e148c79 ND |
277 | * msg_ids.rw_mutex (writer) and the spinlock for this message queue are held |
278 | * before freeque() is called. msg_ids.rw_mutex remains locked on exit. | |
1da177e4 | 279 | */ |
01b8b07a | 280 | static void freeque(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp) |
1da177e4 LT |
281 | { |
282 | struct list_head *tmp; | |
01b8b07a | 283 | struct msg_queue *msq = container_of(ipcp, struct msg_queue, q_perm); |
1da177e4 | 284 | |
5a06a363 IM |
285 | expunge_all(msq, -EIDRM); |
286 | ss_wakeup(&msq->q_senders, 1); | |
7ca7e564 | 287 | msg_rmid(ns, msq); |
1da177e4 | 288 | msg_unlock(msq); |
5a06a363 | 289 | |
1da177e4 | 290 | tmp = msq->q_messages.next; |
5a06a363 IM |
291 | while (tmp != &msq->q_messages) { |
292 | struct msg_msg *msg = list_entry(tmp, struct msg_msg, m_list); | |
293 | ||
1da177e4 | 294 | tmp = tmp->next; |
3ac88a41 | 295 | atomic_dec(&ns->msg_hdrs); |
1da177e4 LT |
296 | free_msg(msg); |
297 | } | |
3ac88a41 | 298 | atomic_sub(msq->q_cbytes, &ns->msg_bytes); |
1da177e4 LT |
299 | security_msg_queue_free(msq); |
300 | ipc_rcu_putref(msq); | |
301 | } | |
302 | ||
f4566f04 | 303 | /* |
3e148c79 | 304 | * Called with msg_ids.rw_mutex and ipcp locked. |
f4566f04 | 305 | */ |
03f02c76 | 306 | static inline int msg_security(struct kern_ipc_perm *ipcp, int msgflg) |
7748dbfa | 307 | { |
03f02c76 ND |
308 | struct msg_queue *msq = container_of(ipcp, struct msg_queue, q_perm); |
309 | ||
310 | return security_msg_queue_associate(msq, msgflg); | |
7748dbfa ND |
311 | } |
312 | ||
e48fbb69 | 313 | SYSCALL_DEFINE2(msgget, key_t, key, int, msgflg) |
1da177e4 | 314 | { |
1e786937 | 315 | struct ipc_namespace *ns; |
7748dbfa ND |
316 | struct ipc_ops msg_ops; |
317 | struct ipc_params msg_params; | |
1e786937 KK |
318 | |
319 | ns = current->nsproxy->ipc_ns; | |
7ca7e564 | 320 | |
7748dbfa ND |
321 | msg_ops.getnew = newque; |
322 | msg_ops.associate = msg_security; | |
323 | msg_ops.more_checks = NULL; | |
324 | ||
325 | msg_params.key = key; | |
326 | msg_params.flg = msgflg; | |
5a06a363 | 327 | |
7748dbfa | 328 | return ipcget(ns, &msg_ids(ns), &msg_ops, &msg_params); |
1da177e4 LT |
329 | } |
330 | ||
5a06a363 IM |
331 | static inline unsigned long |
332 | copy_msqid_to_user(void __user *buf, struct msqid64_ds *in, int version) | |
1da177e4 LT |
333 | { |
334 | switch(version) { | |
335 | case IPC_64: | |
5a06a363 | 336 | return copy_to_user(buf, in, sizeof(*in)); |
1da177e4 | 337 | case IPC_OLD: |
5a06a363 | 338 | { |
1da177e4 LT |
339 | struct msqid_ds out; |
340 | ||
5a06a363 | 341 | memset(&out, 0, sizeof(out)); |
1da177e4 LT |
342 | |
343 | ipc64_perm_to_ipc_perm(&in->msg_perm, &out.msg_perm); | |
344 | ||
345 | out.msg_stime = in->msg_stime; | |
346 | out.msg_rtime = in->msg_rtime; | |
347 | out.msg_ctime = in->msg_ctime; | |
348 | ||
4be929be AD |
349 | if (in->msg_cbytes > USHRT_MAX) |
350 | out.msg_cbytes = USHRT_MAX; | |
1da177e4 LT |
351 | else |
352 | out.msg_cbytes = in->msg_cbytes; | |
353 | out.msg_lcbytes = in->msg_cbytes; | |
354 | ||
4be929be AD |
355 | if (in->msg_qnum > USHRT_MAX) |
356 | out.msg_qnum = USHRT_MAX; | |
1da177e4 LT |
357 | else |
358 | out.msg_qnum = in->msg_qnum; | |
359 | ||
4be929be AD |
360 | if (in->msg_qbytes > USHRT_MAX) |
361 | out.msg_qbytes = USHRT_MAX; | |
1da177e4 LT |
362 | else |
363 | out.msg_qbytes = in->msg_qbytes; | |
364 | out.msg_lqbytes = in->msg_qbytes; | |
365 | ||
366 | out.msg_lspid = in->msg_lspid; | |
367 | out.msg_lrpid = in->msg_lrpid; | |
368 | ||
5a06a363 IM |
369 | return copy_to_user(buf, &out, sizeof(out)); |
370 | } | |
1da177e4 LT |
371 | default: |
372 | return -EINVAL; | |
373 | } | |
374 | } | |
375 | ||
5a06a363 | 376 | static inline unsigned long |
016d7132 | 377 | copy_msqid_from_user(struct msqid64_ds *out, void __user *buf, int version) |
1da177e4 LT |
378 | { |
379 | switch(version) { | |
380 | case IPC_64: | |
016d7132 | 381 | if (copy_from_user(out, buf, sizeof(*out))) |
1da177e4 | 382 | return -EFAULT; |
1da177e4 | 383 | return 0; |
1da177e4 | 384 | case IPC_OLD: |
5a06a363 | 385 | { |
1da177e4 LT |
386 | struct msqid_ds tbuf_old; |
387 | ||
5a06a363 | 388 | if (copy_from_user(&tbuf_old, buf, sizeof(tbuf_old))) |
1da177e4 LT |
389 | return -EFAULT; |
390 | ||
016d7132 PP |
391 | out->msg_perm.uid = tbuf_old.msg_perm.uid; |
392 | out->msg_perm.gid = tbuf_old.msg_perm.gid; | |
393 | out->msg_perm.mode = tbuf_old.msg_perm.mode; | |
1da177e4 | 394 | |
5a06a363 | 395 | if (tbuf_old.msg_qbytes == 0) |
016d7132 | 396 | out->msg_qbytes = tbuf_old.msg_lqbytes; |
1da177e4 | 397 | else |
016d7132 | 398 | out->msg_qbytes = tbuf_old.msg_qbytes; |
1da177e4 LT |
399 | |
400 | return 0; | |
5a06a363 | 401 | } |
1da177e4 LT |
402 | default: |
403 | return -EINVAL; | |
404 | } | |
405 | } | |
406 | ||
a0d092fc PP |
407 | /* |
408 | * This function handles some msgctl commands which require the rw_mutex | |
409 | * to be held in write mode. | |
410 | * NOTE: no locks must be held, the rw_mutex is taken inside this function. | |
411 | */ | |
412 | static int msgctl_down(struct ipc_namespace *ns, int msqid, int cmd, | |
413 | struct msqid_ds __user *buf, int version) | |
1da177e4 | 414 | { |
1da177e4 | 415 | struct kern_ipc_perm *ipcp; |
f1970c48 | 416 | struct msqid64_ds uninitialized_var(msqid64); |
a0d092fc PP |
417 | struct msg_queue *msq; |
418 | int err; | |
419 | ||
420 | if (cmd == IPC_SET) { | |
016d7132 | 421 | if (copy_msqid_from_user(&msqid64, buf, version)) |
a0d092fc PP |
422 | return -EFAULT; |
423 | } | |
424 | ||
b0e77598 | 425 | ipcp = ipcctl_pre_down(ns, &msg_ids(ns), msqid, cmd, |
a5f75e7f PP |
426 | &msqid64.msg_perm, msqid64.msg_qbytes); |
427 | if (IS_ERR(ipcp)) | |
428 | return PTR_ERR(ipcp); | |
a0d092fc | 429 | |
a5f75e7f | 430 | msq = container_of(ipcp, struct msg_queue, q_perm); |
a0d092fc PP |
431 | |
432 | err = security_msg_queue_msgctl(msq, cmd); | |
433 | if (err) | |
434 | goto out_unlock; | |
435 | ||
436 | switch (cmd) { | |
437 | case IPC_RMID: | |
438 | freeque(ns, ipcp); | |
439 | goto out_up; | |
440 | case IPC_SET: | |
016d7132 | 441 | if (msqid64.msg_qbytes > ns->msg_ctlmnb && |
a0d092fc PP |
442 | !capable(CAP_SYS_RESOURCE)) { |
443 | err = -EPERM; | |
444 | goto out_unlock; | |
445 | } | |
446 | ||
1efdb69b EB |
447 | err = ipc_update_perm(&msqid64.msg_perm, ipcp); |
448 | if (err) | |
449 | goto out_unlock; | |
450 | ||
016d7132 | 451 | msq->q_qbytes = msqid64.msg_qbytes; |
a0d092fc | 452 | |
a0d092fc PP |
453 | msq->q_ctime = get_seconds(); |
454 | /* sleeping receivers might be excluded by | |
455 | * stricter permissions. | |
456 | */ | |
457 | expunge_all(msq, -EAGAIN); | |
458 | /* sleeping senders might be able to send | |
459 | * due to a larger queue size. | |
460 | */ | |
461 | ss_wakeup(&msq->q_senders, 0); | |
462 | break; | |
463 | default: | |
464 | err = -EINVAL; | |
465 | } | |
466 | out_unlock: | |
467 | msg_unlock(msq); | |
468 | out_up: | |
469 | up_write(&msg_ids(ns).rw_mutex); | |
470 | return err; | |
471 | } | |
472 | ||
e48fbb69 | 473 | SYSCALL_DEFINE3(msgctl, int, msqid, int, cmd, struct msqid_ds __user *, buf) |
a0d092fc | 474 | { |
5a06a363 IM |
475 | struct msg_queue *msq; |
476 | int err, version; | |
1e786937 | 477 | struct ipc_namespace *ns; |
5a06a363 | 478 | |
1da177e4 LT |
479 | if (msqid < 0 || cmd < 0) |
480 | return -EINVAL; | |
481 | ||
482 | version = ipc_parse_version(&cmd); | |
1e786937 | 483 | ns = current->nsproxy->ipc_ns; |
1da177e4 LT |
484 | |
485 | switch (cmd) { | |
5a06a363 IM |
486 | case IPC_INFO: |
487 | case MSG_INFO: | |
488 | { | |
1da177e4 LT |
489 | struct msginfo msginfo; |
490 | int max_id; | |
5a06a363 | 491 | |
1da177e4 LT |
492 | if (!buf) |
493 | return -EFAULT; | |
5a06a363 IM |
494 | /* |
495 | * We must not return kernel stack data. | |
1da177e4 LT |
496 | * due to padding, it's not enough |
497 | * to set all member fields. | |
498 | */ | |
1da177e4 LT |
499 | err = security_msg_queue_msgctl(NULL, cmd); |
500 | if (err) | |
501 | return err; | |
502 | ||
5a06a363 | 503 | memset(&msginfo, 0, sizeof(msginfo)); |
1e786937 KK |
504 | msginfo.msgmni = ns->msg_ctlmni; |
505 | msginfo.msgmax = ns->msg_ctlmax; | |
506 | msginfo.msgmnb = ns->msg_ctlmnb; | |
1da177e4 LT |
507 | msginfo.msgssz = MSGSSZ; |
508 | msginfo.msgseg = MSGSEG; | |
3e148c79 | 509 | down_read(&msg_ids(ns).rw_mutex); |
1da177e4 | 510 | if (cmd == MSG_INFO) { |
1e786937 | 511 | msginfo.msgpool = msg_ids(ns).in_use; |
3ac88a41 KK |
512 | msginfo.msgmap = atomic_read(&ns->msg_hdrs); |
513 | msginfo.msgtql = atomic_read(&ns->msg_bytes); | |
1da177e4 LT |
514 | } else { |
515 | msginfo.msgmap = MSGMAP; | |
516 | msginfo.msgpool = MSGPOOL; | |
517 | msginfo.msgtql = MSGTQL; | |
518 | } | |
7ca7e564 | 519 | max_id = ipc_get_maxid(&msg_ids(ns)); |
3e148c79 | 520 | up_read(&msg_ids(ns).rw_mutex); |
5a06a363 | 521 | if (copy_to_user(buf, &msginfo, sizeof(struct msginfo))) |
1da177e4 | 522 | return -EFAULT; |
5a06a363 | 523 | return (max_id < 0) ? 0 : max_id; |
1da177e4 | 524 | } |
7ca7e564 | 525 | case MSG_STAT: /* msqid is an index rather than a msg queue id */ |
1da177e4 LT |
526 | case IPC_STAT: |
527 | { | |
528 | struct msqid64_ds tbuf; | |
529 | int success_return; | |
5a06a363 | 530 | |
1da177e4 LT |
531 | if (!buf) |
532 | return -EFAULT; | |
1da177e4 | 533 | |
5a06a363 | 534 | if (cmd == MSG_STAT) { |
023a5355 ND |
535 | msq = msg_lock(ns, msqid); |
536 | if (IS_ERR(msq)) | |
537 | return PTR_ERR(msq); | |
7ca7e564 | 538 | success_return = msq->q_perm.id; |
1da177e4 | 539 | } else { |
023a5355 ND |
540 | msq = msg_lock_check(ns, msqid); |
541 | if (IS_ERR(msq)) | |
542 | return PTR_ERR(msq); | |
1da177e4 LT |
543 | success_return = 0; |
544 | } | |
545 | err = -EACCES; | |
b0e77598 | 546 | if (ipcperms(ns, &msq->q_perm, S_IRUGO)) |
1da177e4 LT |
547 | goto out_unlock; |
548 | ||
549 | err = security_msg_queue_msgctl(msq, cmd); | |
550 | if (err) | |
551 | goto out_unlock; | |
552 | ||
023a5355 ND |
553 | memset(&tbuf, 0, sizeof(tbuf)); |
554 | ||
1da177e4 LT |
555 | kernel_to_ipc64_perm(&msq->q_perm, &tbuf.msg_perm); |
556 | tbuf.msg_stime = msq->q_stime; | |
557 | tbuf.msg_rtime = msq->q_rtime; | |
558 | tbuf.msg_ctime = msq->q_ctime; | |
559 | tbuf.msg_cbytes = msq->q_cbytes; | |
560 | tbuf.msg_qnum = msq->q_qnum; | |
561 | tbuf.msg_qbytes = msq->q_qbytes; | |
562 | tbuf.msg_lspid = msq->q_lspid; | |
563 | tbuf.msg_lrpid = msq->q_lrpid; | |
564 | msg_unlock(msq); | |
565 | if (copy_msqid_to_user(buf, &tbuf, version)) | |
566 | return -EFAULT; | |
567 | return success_return; | |
568 | } | |
569 | case IPC_SET: | |
1da177e4 | 570 | case IPC_RMID: |
a0d092fc PP |
571 | err = msgctl_down(ns, msqid, cmd, buf, version); |
572 | return err; | |
1da177e4 LT |
573 | default: |
574 | return -EINVAL; | |
575 | } | |
576 | ||
1da177e4 LT |
577 | out_unlock: |
578 | msg_unlock(msq); | |
579 | return err; | |
580 | } | |
581 | ||
5a06a363 | 582 | static int testmsg(struct msg_msg *msg, long type, int mode) |
1da177e4 LT |
583 | { |
584 | switch(mode) | |
585 | { | |
586 | case SEARCH_ANY: | |
8ac6ed58 | 587 | case SEARCH_NUMBER: |
1da177e4 LT |
588 | return 1; |
589 | case SEARCH_LESSEQUAL: | |
5a06a363 | 590 | if (msg->m_type <=type) |
1da177e4 LT |
591 | return 1; |
592 | break; | |
593 | case SEARCH_EQUAL: | |
5a06a363 | 594 | if (msg->m_type == type) |
1da177e4 LT |
595 | return 1; |
596 | break; | |
597 | case SEARCH_NOTEQUAL: | |
5a06a363 | 598 | if (msg->m_type != type) |
1da177e4 LT |
599 | return 1; |
600 | break; | |
601 | } | |
602 | return 0; | |
603 | } | |
604 | ||
5a06a363 | 605 | static inline int pipelined_send(struct msg_queue *msq, struct msg_msg *msg) |
1da177e4 | 606 | { |
5a06a363 | 607 | struct list_head *tmp; |
1da177e4 LT |
608 | |
609 | tmp = msq->q_receivers.next; | |
610 | while (tmp != &msq->q_receivers) { | |
5a06a363 IM |
611 | struct msg_receiver *msr; |
612 | ||
613 | msr = list_entry(tmp, struct msg_receiver, r_list); | |
1da177e4 | 614 | tmp = tmp->next; |
5a06a363 IM |
615 | if (testmsg(msg, msr->r_msgtype, msr->r_mode) && |
616 | !security_msg_queue_msgrcv(msq, msg, msr->r_tsk, | |
617 | msr->r_msgtype, msr->r_mode)) { | |
618 | ||
1da177e4 | 619 | list_del(&msr->r_list); |
5a06a363 | 620 | if (msr->r_maxsize < msg->m_ts) { |
1da177e4 LT |
621 | msr->r_msg = NULL; |
622 | wake_up_process(msr->r_tsk); | |
623 | smp_mb(); | |
624 | msr->r_msg = ERR_PTR(-E2BIG); | |
625 | } else { | |
626 | msr->r_msg = NULL; | |
b488893a | 627 | msq->q_lrpid = task_pid_vnr(msr->r_tsk); |
1da177e4 LT |
628 | msq->q_rtime = get_seconds(); |
629 | wake_up_process(msr->r_tsk); | |
630 | smp_mb(); | |
631 | msr->r_msg = msg; | |
5a06a363 | 632 | |
1da177e4 LT |
633 | return 1; |
634 | } | |
635 | } | |
636 | } | |
637 | return 0; | |
638 | } | |
639 | ||
651971cb | 640 | long do_msgsnd(int msqid, long mtype, void __user *mtext, |
641 | size_t msgsz, int msgflg) | |
1da177e4 LT |
642 | { |
643 | struct msg_queue *msq; | |
644 | struct msg_msg *msg; | |
1da177e4 | 645 | int err; |
1e786937 KK |
646 | struct ipc_namespace *ns; |
647 | ||
648 | ns = current->nsproxy->ipc_ns; | |
5a06a363 | 649 | |
1e786937 | 650 | if (msgsz > ns->msg_ctlmax || (long) msgsz < 0 || msqid < 0) |
1da177e4 | 651 | return -EINVAL; |
1da177e4 LT |
652 | if (mtype < 1) |
653 | return -EINVAL; | |
654 | ||
651971cb | 655 | msg = load_msg(mtext, msgsz); |
5a06a363 | 656 | if (IS_ERR(msg)) |
1da177e4 LT |
657 | return PTR_ERR(msg); |
658 | ||
659 | msg->m_type = mtype; | |
660 | msg->m_ts = msgsz; | |
661 | ||
023a5355 ND |
662 | msq = msg_lock_check(ns, msqid); |
663 | if (IS_ERR(msq)) { | |
664 | err = PTR_ERR(msq); | |
1da177e4 | 665 | goto out_free; |
023a5355 | 666 | } |
1da177e4 LT |
667 | |
668 | for (;;) { | |
669 | struct msg_sender s; | |
670 | ||
5a06a363 | 671 | err = -EACCES; |
b0e77598 | 672 | if (ipcperms(ns, &msq->q_perm, S_IWUGO)) |
1da177e4 LT |
673 | goto out_unlock_free; |
674 | ||
675 | err = security_msg_queue_msgsnd(msq, msg, msgflg); | |
676 | if (err) | |
677 | goto out_unlock_free; | |
678 | ||
5a06a363 | 679 | if (msgsz + msq->q_cbytes <= msq->q_qbytes && |
1da177e4 LT |
680 | 1 + msq->q_qnum <= msq->q_qbytes) { |
681 | break; | |
682 | } | |
683 | ||
684 | /* queue full, wait: */ | |
5a06a363 IM |
685 | if (msgflg & IPC_NOWAIT) { |
686 | err = -EAGAIN; | |
1da177e4 LT |
687 | goto out_unlock_free; |
688 | } | |
689 | ss_add(msq, &s); | |
690 | ipc_rcu_getref(msq); | |
691 | msg_unlock(msq); | |
692 | schedule(); | |
693 | ||
694 | ipc_lock_by_ptr(&msq->q_perm); | |
695 | ipc_rcu_putref(msq); | |
696 | if (msq->q_perm.deleted) { | |
697 | err = -EIDRM; | |
698 | goto out_unlock_free; | |
699 | } | |
700 | ss_del(&s); | |
5a06a363 | 701 | |
1da177e4 | 702 | if (signal_pending(current)) { |
5a06a363 | 703 | err = -ERESTARTNOHAND; |
1da177e4 LT |
704 | goto out_unlock_free; |
705 | } | |
706 | } | |
707 | ||
b488893a | 708 | msq->q_lspid = task_tgid_vnr(current); |
1da177e4 LT |
709 | msq->q_stime = get_seconds(); |
710 | ||
5a06a363 | 711 | if (!pipelined_send(msq, msg)) { |
25985edc | 712 | /* no one is waiting for this message, enqueue it */ |
5a06a363 | 713 | list_add_tail(&msg->m_list, &msq->q_messages); |
1da177e4 LT |
714 | msq->q_cbytes += msgsz; |
715 | msq->q_qnum++; | |
3ac88a41 KK |
716 | atomic_add(msgsz, &ns->msg_bytes); |
717 | atomic_inc(&ns->msg_hdrs); | |
1da177e4 | 718 | } |
5a06a363 | 719 | |
1da177e4 LT |
720 | err = 0; |
721 | msg = NULL; | |
722 | ||
723 | out_unlock_free: | |
724 | msg_unlock(msq); | |
725 | out_free: | |
5a06a363 | 726 | if (msg != NULL) |
1da177e4 LT |
727 | free_msg(msg); |
728 | return err; | |
729 | } | |
730 | ||
e48fbb69 HC |
731 | SYSCALL_DEFINE4(msgsnd, int, msqid, struct msgbuf __user *, msgp, size_t, msgsz, |
732 | int, msgflg) | |
651971cb | 733 | { |
734 | long mtype; | |
735 | ||
736 | if (get_user(mtype, &msgp->mtype)) | |
737 | return -EFAULT; | |
738 | return do_msgsnd(msqid, mtype, msgp->mtext, msgsz, msgflg); | |
739 | } | |
740 | ||
5a06a363 | 741 | static inline int convert_mode(long *msgtyp, int msgflg) |
1da177e4 | 742 | { |
8ac6ed58 PH |
743 | if (msgflg & MSG_COPY) |
744 | return SEARCH_NUMBER; | |
5a06a363 | 745 | /* |
1da177e4 LT |
746 | * find message of correct type. |
747 | * msgtyp = 0 => get first. | |
748 | * msgtyp > 0 => get first message of matching type. | |
5a06a363 | 749 | * msgtyp < 0 => get message with least type must be < abs(msgtype). |
1da177e4 | 750 | */ |
5a06a363 | 751 | if (*msgtyp == 0) |
1da177e4 | 752 | return SEARCH_ANY; |
5a06a363 IM |
753 | if (*msgtyp < 0) { |
754 | *msgtyp = -*msgtyp; | |
1da177e4 LT |
755 | return SEARCH_LESSEQUAL; |
756 | } | |
5a06a363 | 757 | if (msgflg & MSG_EXCEPT) |
1da177e4 LT |
758 | return SEARCH_NOTEQUAL; |
759 | return SEARCH_EQUAL; | |
760 | } | |
761 | ||
f9dd87f4 SK |
762 | static long do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bufsz) |
763 | { | |
764 | struct msgbuf __user *msgp = dest; | |
765 | size_t msgsz; | |
766 | ||
767 | if (put_user(msg->m_type, &msgp->mtype)) | |
768 | return -EFAULT; | |
769 | ||
770 | msgsz = (bufsz > msg->m_ts) ? msg->m_ts : bufsz; | |
771 | if (store_msg(msgp->mtext, msg, msgsz)) | |
772 | return -EFAULT; | |
773 | return msgsz; | |
774 | } | |
775 | ||
4a674f34 | 776 | #ifdef CONFIG_CHECKPOINT_RESTORE |
3fcfe786 SK |
777 | /* |
778 | * This function creates new kernel message structure, large enough to store | |
779 | * bufsz message bytes. | |
780 | */ | |
8ac6ed58 | 781 | static inline struct msg_msg *prepare_copy(void __user *buf, size_t bufsz) |
4a674f34 SK |
782 | { |
783 | struct msg_msg *copy; | |
784 | ||
4a674f34 SK |
785 | /* |
786 | * Create dummy message to copy real message to. | |
787 | */ | |
788 | copy = load_msg(buf, bufsz); | |
789 | if (!IS_ERR(copy)) | |
790 | copy->m_ts = bufsz; | |
791 | return copy; | |
792 | } | |
793 | ||
85398aa8 | 794 | static inline void free_copy(struct msg_msg *copy) |
4a674f34 | 795 | { |
85398aa8 | 796 | if (copy) |
4a674f34 SK |
797 | free_msg(copy); |
798 | } | |
799 | #else | |
8ac6ed58 | 800 | static inline struct msg_msg *prepare_copy(void __user *buf, size_t bufsz) |
b30efe27 SK |
801 | { |
802 | return ERR_PTR(-ENOSYS); | |
803 | } | |
804 | ||
85398aa8 SK |
805 | static inline void free_copy(struct msg_msg *copy) |
806 | { | |
807 | } | |
4a674f34 SK |
808 | #endif |
809 | ||
f9dd87f4 SK |
810 | long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp, |
811 | int msgflg, | |
812 | long (*msg_handler)(void __user *, struct msg_msg *, size_t)) | |
1da177e4 LT |
813 | { |
814 | struct msg_queue *msq; | |
815 | struct msg_msg *msg; | |
816 | int mode; | |
1e786937 | 817 | struct ipc_namespace *ns; |
85398aa8 | 818 | struct msg_msg *copy = NULL; |
1da177e4 | 819 | |
88b9e456 PH |
820 | ns = current->nsproxy->ipc_ns; |
821 | ||
f9dd87f4 | 822 | if (msqid < 0 || (long) bufsz < 0) |
1da177e4 | 823 | return -EINVAL; |
4a674f34 | 824 | if (msgflg & MSG_COPY) { |
8ac6ed58 | 825 | copy = prepare_copy(buf, min_t(size_t, bufsz, ns->msg_ctlmax)); |
4a674f34 SK |
826 | if (IS_ERR(copy)) |
827 | return PTR_ERR(copy); | |
828 | } | |
5a06a363 | 829 | mode = convert_mode(&msgtyp, msgflg); |
1da177e4 | 830 | |
023a5355 | 831 | msq = msg_lock_check(ns, msqid); |
4a674f34 | 832 | if (IS_ERR(msq)) { |
85398aa8 | 833 | free_copy(copy); |
023a5355 | 834 | return PTR_ERR(msq); |
4a674f34 | 835 | } |
1da177e4 LT |
836 | |
837 | for (;;) { | |
838 | struct msg_receiver msr_d; | |
d076ac91 | 839 | struct msg_msg *walk_msg; |
4a674f34 | 840 | long msg_counter = 0; |
1da177e4 LT |
841 | |
842 | msg = ERR_PTR(-EACCES); | |
b0e77598 | 843 | if (ipcperms(ns, &msq->q_perm, S_IRUGO)) |
1da177e4 LT |
844 | goto out_unlock; |
845 | ||
846 | msg = ERR_PTR(-EAGAIN); | |
d076ac91 | 847 | list_for_each_entry(walk_msg, &msq->q_messages, m_list) { |
5a06a363 | 848 | |
5a06a363 IM |
849 | if (testmsg(walk_msg, msgtyp, mode) && |
850 | !security_msg_queue_msgrcv(msq, walk_msg, current, | |
851 | msgtyp, mode)) { | |
852 | ||
1da177e4 | 853 | msg = walk_msg; |
5a06a363 IM |
854 | if (mode == SEARCH_LESSEQUAL && |
855 | walk_msg->m_type != 1) { | |
5a06a363 | 856 | msgtyp = walk_msg->m_type - 1; |
8ac6ed58 PH |
857 | } else if (mode == SEARCH_NUMBER) { |
858 | if (msgtyp == msg_counter) | |
4a674f34 | 859 | break; |
2dc958fa | 860 | msg = ERR_PTR(-EAGAIN); |
9afdacda | 861 | } else |
1da177e4 | 862 | break; |
4a674f34 | 863 | msg_counter++; |
1da177e4 | 864 | } |
1da177e4 | 865 | } |
5a06a363 IM |
866 | if (!IS_ERR(msg)) { |
867 | /* | |
868 | * Found a suitable message. | |
869 | * Unlink it from the queue. | |
870 | */ | |
f9dd87f4 | 871 | if ((bufsz < msg->m_ts) && !(msgflg & MSG_NOERROR)) { |
1da177e4 LT |
872 | msg = ERR_PTR(-E2BIG); |
873 | goto out_unlock; | |
874 | } | |
3fcfe786 SK |
875 | /* |
876 | * If we are copying, then do not unlink message and do | |
877 | * not update queue parameters. | |
878 | */ | |
852028af PH |
879 | if (msgflg & MSG_COPY) { |
880 | msg = copy_msg(msg, copy); | |
4a674f34 | 881 | goto out_unlock; |
852028af | 882 | } |
1da177e4 LT |
883 | list_del(&msg->m_list); |
884 | msq->q_qnum--; | |
885 | msq->q_rtime = get_seconds(); | |
b488893a | 886 | msq->q_lrpid = task_tgid_vnr(current); |
1da177e4 | 887 | msq->q_cbytes -= msg->m_ts; |
3ac88a41 KK |
888 | atomic_sub(msg->m_ts, &ns->msg_bytes); |
889 | atomic_dec(&ns->msg_hdrs); | |
5a06a363 | 890 | ss_wakeup(&msq->q_senders, 0); |
1da177e4 LT |
891 | msg_unlock(msq); |
892 | break; | |
893 | } | |
894 | /* No message waiting. Wait for a message */ | |
895 | if (msgflg & IPC_NOWAIT) { | |
896 | msg = ERR_PTR(-ENOMSG); | |
897 | goto out_unlock; | |
898 | } | |
5a06a363 | 899 | list_add_tail(&msr_d.r_list, &msq->q_receivers); |
1da177e4 LT |
900 | msr_d.r_tsk = current; |
901 | msr_d.r_msgtype = msgtyp; | |
902 | msr_d.r_mode = mode; | |
5a06a363 | 903 | if (msgflg & MSG_NOERROR) |
1da177e4 | 904 | msr_d.r_maxsize = INT_MAX; |
5a06a363 | 905 | else |
f9dd87f4 | 906 | msr_d.r_maxsize = bufsz; |
1da177e4 LT |
907 | msr_d.r_msg = ERR_PTR(-EAGAIN); |
908 | current->state = TASK_INTERRUPTIBLE; | |
909 | msg_unlock(msq); | |
910 | ||
911 | schedule(); | |
912 | ||
913 | /* Lockless receive, part 1: | |
914 | * Disable preemption. We don't hold a reference to the queue | |
915 | * and getting a reference would defeat the idea of a lockless | |
916 | * operation, thus the code relies on rcu to guarantee the | |
25985edc | 917 | * existence of msq: |
1da177e4 LT |
918 | * Prior to destruction, expunge_all(-EIRDM) changes r_msg. |
919 | * Thus if r_msg is -EAGAIN, then the queue not yet destroyed. | |
920 | * rcu_read_lock() prevents preemption between reading r_msg | |
921 | * and the spin_lock() inside ipc_lock_by_ptr(). | |
922 | */ | |
923 | rcu_read_lock(); | |
924 | ||
925 | /* Lockless receive, part 2: | |
926 | * Wait until pipelined_send or expunge_all are outside of | |
927 | * wake_up_process(). There is a race with exit(), see | |
928 | * ipc/mqueue.c for the details. | |
929 | */ | |
5a06a363 | 930 | msg = (struct msg_msg*)msr_d.r_msg; |
1da177e4 LT |
931 | while (msg == NULL) { |
932 | cpu_relax(); | |
5a06a363 | 933 | msg = (struct msg_msg *)msr_d.r_msg; |
1da177e4 LT |
934 | } |
935 | ||
936 | /* Lockless receive, part 3: | |
937 | * If there is a message or an error then accept it without | |
938 | * locking. | |
939 | */ | |
5a06a363 | 940 | if (msg != ERR_PTR(-EAGAIN)) { |
1da177e4 LT |
941 | rcu_read_unlock(); |
942 | break; | |
943 | } | |
944 | ||
945 | /* Lockless receive, part 3: | |
946 | * Acquire the queue spinlock. | |
947 | */ | |
948 | ipc_lock_by_ptr(&msq->q_perm); | |
949 | rcu_read_unlock(); | |
950 | ||
951 | /* Lockless receive, part 4: | |
952 | * Repeat test after acquiring the spinlock. | |
953 | */ | |
954 | msg = (struct msg_msg*)msr_d.r_msg; | |
5a06a363 | 955 | if (msg != ERR_PTR(-EAGAIN)) |
1da177e4 LT |
956 | goto out_unlock; |
957 | ||
958 | list_del(&msr_d.r_list); | |
959 | if (signal_pending(current)) { | |
960 | msg = ERR_PTR(-ERESTARTNOHAND); | |
961 | out_unlock: | |
962 | msg_unlock(msq); | |
963 | break; | |
964 | } | |
965 | } | |
4a674f34 | 966 | if (IS_ERR(msg)) { |
85398aa8 | 967 | free_copy(copy); |
5a06a363 | 968 | return PTR_ERR(msg); |
4a674f34 | 969 | } |
1da177e4 | 970 | |
f9dd87f4 | 971 | bufsz = msg_handler(buf, msg, bufsz); |
1da177e4 | 972 | free_msg(msg); |
5a06a363 | 973 | |
f9dd87f4 | 974 | return bufsz; |
1da177e4 LT |
975 | } |
976 | ||
e48fbb69 HC |
977 | SYSCALL_DEFINE5(msgrcv, int, msqid, struct msgbuf __user *, msgp, size_t, msgsz, |
978 | long, msgtyp, int, msgflg) | |
651971cb | 979 | { |
f9dd87f4 | 980 | return do_msgrcv(msqid, msgp, msgsz, msgtyp, msgflg, do_msg_fill); |
651971cb | 981 | } |
982 | ||
1da177e4 | 983 | #ifdef CONFIG_PROC_FS |
19b4946c | 984 | static int sysvipc_msg_proc_show(struct seq_file *s, void *it) |
1da177e4 | 985 | { |
1efdb69b | 986 | struct user_namespace *user_ns = seq_user_ns(s); |
19b4946c MW |
987 | struct msg_queue *msq = it; |
988 | ||
989 | return seq_printf(s, | |
5a06a363 IM |
990 | "%10d %10d %4o %10lu %10lu %5u %5u %5u %5u %5u %5u %10lu %10lu %10lu\n", |
991 | msq->q_perm.key, | |
7ca7e564 | 992 | msq->q_perm.id, |
5a06a363 IM |
993 | msq->q_perm.mode, |
994 | msq->q_cbytes, | |
995 | msq->q_qnum, | |
996 | msq->q_lspid, | |
997 | msq->q_lrpid, | |
1efdb69b EB |
998 | from_kuid_munged(user_ns, msq->q_perm.uid), |
999 | from_kgid_munged(user_ns, msq->q_perm.gid), | |
1000 | from_kuid_munged(user_ns, msq->q_perm.cuid), | |
1001 | from_kgid_munged(user_ns, msq->q_perm.cgid), | |
5a06a363 IM |
1002 | msq->q_stime, |
1003 | msq->q_rtime, | |
1004 | msq->q_ctime); | |
1da177e4 LT |
1005 | } |
1006 | #endif |