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[/] [test_project/] [trunk/] [linux_sd_driver/] [ipc/] [compat.c] - Blame information for rev 62

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Line No. Rev Author Line
1 62 marcus.erl
/*
2
 * 32 bit compatibility code for System V IPC
3
 *
4
 * Copyright (C) 1997,1998      Jakub Jelinek (jj@sunsite.mff.cuni.cz)
5
 * Copyright (C) 1997           David S. Miller (davem@caip.rutgers.edu)
6
 * Copyright (C) 1999           Arun Sharma <arun.sharma@intel.com>
7
 * Copyright (C) 2000           VA Linux Co
8
 * Copyright (C) 2000           Don Dugger <n0ano@valinux.com>
9
 * Copyright (C) 2000           Hewlett-Packard Co.
10
 * Copyright (C) 2000           David Mosberger-Tang <davidm@hpl.hp.com>
11
 * Copyright (C) 2000           Gerhard Tonn (ton@de.ibm.com)
12
 * Copyright (C) 2000-2002      Andi Kleen, SuSE Labs (x86-64 port)
13
 * Copyright (C) 2000           Silicon Graphics, Inc.
14
 * Copyright (C) 2001           IBM
15
 * Copyright (C) 2004           IBM Deutschland Entwicklung GmbH, IBM Corporation
16
 * Copyright (C) 2004           Arnd Bergmann (arnd@arndb.de)
17
 *
18
 * This code is collected from the versions for sparc64, mips64, s390x, ia64,
19
 * ppc64 and x86_64, all of which are based on the original sparc64 version
20
 * by Jakub Jelinek.
21
 *
22
 */
23
#include <linux/compat.h>
24
#include <linux/errno.h>
25
#include <linux/highuid.h>
26
#include <linux/init.h>
27
#include <linux/msg.h>
28
#include <linux/shm.h>
29
#include <linux/slab.h>
30
#include <linux/syscalls.h>
31
 
32
#include <linux/mutex.h>
33
#include <asm/uaccess.h>
34
 
35
#include "util.h"
36
 
37
struct compat_msgbuf {
38
        compat_long_t mtype;
39
        char mtext[1];
40
};
41
 
42
struct compat_ipc_perm {
43
        key_t key;
44
        __compat_uid_t uid;
45
        __compat_gid_t gid;
46
        __compat_uid_t cuid;
47
        __compat_gid_t cgid;
48
        compat_mode_t mode;
49
        unsigned short seq;
50
};
51
 
52
struct compat_semid_ds {
53
        struct compat_ipc_perm sem_perm;
54
        compat_time_t sem_otime;
55
        compat_time_t sem_ctime;
56
        compat_uptr_t sem_base;
57
        compat_uptr_t sem_pending;
58
        compat_uptr_t sem_pending_last;
59
        compat_uptr_t undo;
60
        unsigned short sem_nsems;
61
};
62
 
63
struct compat_msqid_ds {
64
        struct compat_ipc_perm msg_perm;
65
        compat_uptr_t msg_first;
66
        compat_uptr_t msg_last;
67
        compat_time_t msg_stime;
68
        compat_time_t msg_rtime;
69
        compat_time_t msg_ctime;
70
        compat_ulong_t msg_lcbytes;
71
        compat_ulong_t msg_lqbytes;
72
        unsigned short msg_cbytes;
73
        unsigned short msg_qnum;
74
        unsigned short msg_qbytes;
75
        compat_ipc_pid_t msg_lspid;
76
        compat_ipc_pid_t msg_lrpid;
77
};
78
 
79
struct compat_shmid_ds {
80
        struct compat_ipc_perm shm_perm;
81
        int shm_segsz;
82
        compat_time_t shm_atime;
83
        compat_time_t shm_dtime;
84
        compat_time_t shm_ctime;
85
        compat_ipc_pid_t shm_cpid;
86
        compat_ipc_pid_t shm_lpid;
87
        unsigned short shm_nattch;
88
        unsigned short shm_unused;
89
        compat_uptr_t shm_unused2;
90
        compat_uptr_t shm_unused3;
91
};
92
 
93
struct compat_ipc_kludge {
94
        compat_uptr_t msgp;
95
        compat_long_t msgtyp;
96
};
97
 
98
struct compat_shminfo64 {
99
        compat_ulong_t shmmax;
100
        compat_ulong_t shmmin;
101
        compat_ulong_t shmmni;
102
        compat_ulong_t shmseg;
103
        compat_ulong_t shmall;
104
        compat_ulong_t __unused1;
105
        compat_ulong_t __unused2;
106
        compat_ulong_t __unused3;
107
        compat_ulong_t __unused4;
108
};
109
 
110
struct compat_shm_info {
111
        compat_int_t used_ids;
112
        compat_ulong_t shm_tot, shm_rss, shm_swp;
113
        compat_ulong_t swap_attempts, swap_successes;
114
};
115
 
116
extern int sem_ctls[];
117
#define sc_semopm       (sem_ctls[2])
118
 
119
static inline int compat_ipc_parse_version(int *cmd)
120
{
121
        int version = *cmd & IPC_64;
122
 
123
        /* this is tricky: architectures that have support for the old
124
         * ipc structures in 64 bit binaries need to have IPC_64 set
125
         * in cmd, the others need to have it cleared */
126
#ifndef ipc_parse_version
127
        *cmd |= IPC_64;
128
#else
129
        *cmd &= ~IPC_64;
130
#endif
131
        return version;
132
}
133
 
134
static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64,
135
                                          struct compat_ipc64_perm __user *up64)
136
{
137
        int err;
138
 
139
        err  = __get_user(p64->uid, &up64->uid);
140
        err |= __get_user(p64->gid, &up64->gid);
141
        err |= __get_user(p64->mode, &up64->mode);
142
        return err;
143
}
144
 
145
static inline int __get_compat_ipc_perm(struct ipc64_perm *p,
146
                                        struct compat_ipc_perm __user *up)
147
{
148
        int err;
149
 
150
        err  = __get_user(p->uid, &up->uid);
151
        err |= __get_user(p->gid, &up->gid);
152
        err |= __get_user(p->mode, &up->mode);
153
        return err;
154
}
155
 
156
static inline int __put_compat_ipc64_perm(struct ipc64_perm *p64,
157
                                          struct compat_ipc64_perm __user *up64)
158
{
159
        int err;
160
 
161
        err  = __put_user(p64->key, &up64->key);
162
        err |= __put_user(p64->uid, &up64->uid);
163
        err |= __put_user(p64->gid, &up64->gid);
164
        err |= __put_user(p64->cuid, &up64->cuid);
165
        err |= __put_user(p64->cgid, &up64->cgid);
166
        err |= __put_user(p64->mode, &up64->mode);
167
        err |= __put_user(p64->seq, &up64->seq);
168
        return err;
169
}
170
 
171
static inline int __put_compat_ipc_perm(struct ipc64_perm *p,
172
                                        struct compat_ipc_perm __user *up)
173
{
174
        int err;
175
        __compat_uid_t u;
176
        __compat_gid_t g;
177
 
178
        err  = __put_user(p->key, &up->key);
179
        SET_UID(u, p->uid);
180
        err |= __put_user(u, &up->uid);
181
        SET_GID(g, p->gid);
182
        err |= __put_user(g, &up->gid);
183
        SET_UID(u, p->cuid);
184
        err |= __put_user(u, &up->cuid);
185
        SET_GID(g, p->cgid);
186
        err |= __put_user(g, &up->cgid);
187
        err |= __put_user(p->mode, &up->mode);
188
        err |= __put_user(p->seq, &up->seq);
189
        return err;
190
}
191
 
192
static inline int get_compat_semid64_ds(struct semid64_ds *s64,
193
                                        struct compat_semid64_ds __user *up64)
194
{
195
        if (!access_ok (VERIFY_READ, up64, sizeof(*up64)))
196
                return -EFAULT;
197
        return __get_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
198
}
199
 
200
static inline int get_compat_semid_ds(struct semid64_ds *s,
201
                                      struct compat_semid_ds __user *up)
202
{
203
        if (!access_ok (VERIFY_READ, up, sizeof(*up)))
204
                return -EFAULT;
205
        return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
206
}
207
 
208
static inline int put_compat_semid64_ds(struct semid64_ds *s64,
209
                                        struct compat_semid64_ds __user *up64)
210
{
211
        int err;
212
 
213
        if (!access_ok (VERIFY_WRITE, up64, sizeof(*up64)))
214
                return -EFAULT;
215
        err  = __put_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
216
        err |= __put_user(s64->sem_otime, &up64->sem_otime);
217
        err |= __put_user(s64->sem_ctime, &up64->sem_ctime);
218
        err |= __put_user(s64->sem_nsems, &up64->sem_nsems);
219
        return err;
220
}
221
 
222
static inline int put_compat_semid_ds(struct semid64_ds *s,
223
                                      struct compat_semid_ds __user *up)
224
{
225
        int err;
226
 
227
        if (!access_ok (VERIFY_WRITE, up, sizeof(*up)))
228
                return -EFAULT;
229
        err  = __put_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
230
        err |= __put_user(s->sem_otime, &up->sem_otime);
231
        err |= __put_user(s->sem_ctime, &up->sem_ctime);
232
        err |= __put_user(s->sem_nsems, &up->sem_nsems);
233
        return err;
234
}
235
 
236
long compat_sys_semctl(int first, int second, int third, void __user *uptr)
237
{
238
        union semun fourth;
239
        u32 pad;
240
        int err, err2;
241
        struct semid64_ds s64;
242
        struct semid64_ds __user *up64;
243
        int version = compat_ipc_parse_version(&third);
244
 
245
        if (!uptr)
246
                return -EINVAL;
247
        if (get_user(pad, (u32 __user *) uptr))
248
                return -EFAULT;
249
        if ((third & (~IPC_64)) == SETVAL)
250
                fourth.val = (int) pad;
251
        else
252
                fourth.__pad = compat_ptr(pad);
253
        switch (third & (~IPC_64)) {
254
        case IPC_INFO:
255
        case IPC_RMID:
256
        case SEM_INFO:
257
        case GETVAL:
258
        case GETPID:
259
        case GETNCNT:
260
        case GETZCNT:
261
        case GETALL:
262
        case SETVAL:
263
        case SETALL:
264
                err = sys_semctl(first, second, third, fourth);
265
                break;
266
 
267
        case IPC_STAT:
268
        case SEM_STAT:
269
                up64 = compat_alloc_user_space(sizeof(s64));
270
                fourth.__pad = up64;
271
                err = sys_semctl(first, second, third, fourth);
272
                if (err < 0)
273
                        break;
274
                if (copy_from_user(&s64, up64, sizeof(s64)))
275
                        err2 = -EFAULT;
276
                else if (version == IPC_64)
277
                        err2 = put_compat_semid64_ds(&s64, compat_ptr(pad));
278
                else
279
                        err2 = put_compat_semid_ds(&s64, compat_ptr(pad));
280
                if (err2)
281
                        err = -EFAULT;
282
                break;
283
 
284
        case IPC_SET:
285
                if (version == IPC_64) {
286
                        err = get_compat_semid64_ds(&s64, compat_ptr(pad));
287
                } else {
288
                        err = get_compat_semid_ds(&s64, compat_ptr(pad));
289
                }
290
                up64 = compat_alloc_user_space(sizeof(s64));
291
                if (copy_to_user(up64, &s64, sizeof(s64)))
292
                        err = -EFAULT;
293
                if (err)
294
                        break;
295
 
296
                fourth.__pad = up64;
297
                err = sys_semctl(first, second, third, fourth);
298
                break;
299
 
300
        default:
301
                err = -EINVAL;
302
                break;
303
        }
304
        return err;
305
}
306
 
307
long compat_sys_msgsnd(int first, int second, int third, void __user *uptr)
308
{
309
        struct compat_msgbuf __user *up = uptr;
310
        long type;
311
 
312
        if (first < 0)
313
                return -EINVAL;
314
        if (second < 0)
315
                return -EINVAL;
316
 
317
        if (get_user(type, &up->mtype))
318
                return -EFAULT;
319
 
320
        return do_msgsnd(first, type, up->mtext, second, third);
321
}
322
 
323
long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
324
                           int version, void __user *uptr)
325
{
326
        struct compat_msgbuf __user *up;
327
        long type;
328
        int err;
329
 
330
        if (first < 0)
331
                return -EINVAL;
332
        if (second < 0)
333
                return -EINVAL;
334
 
335
        if (!version) {
336
                struct compat_ipc_kludge ipck;
337
                err = -EINVAL;
338
                if (!uptr)
339
                        goto out;
340
                err = -EFAULT;
341
                if (copy_from_user (&ipck, uptr, sizeof(ipck)))
342
                        goto out;
343
                uptr = compat_ptr(ipck.msgp);
344
                msgtyp = ipck.msgtyp;
345
        }
346
        up = uptr;
347
        err = do_msgrcv(first, &type, up->mtext, second, msgtyp, third);
348
        if (err < 0)
349
                goto out;
350
        if (put_user(type, &up->mtype))
351
                err = -EFAULT;
352
out:
353
        return err;
354
}
355
 
356
static inline int get_compat_msqid64(struct msqid64_ds *m64,
357
                                     struct compat_msqid64_ds __user *up64)
358
{
359
        int err;
360
 
361
        if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
362
                return -EFAULT;
363
        err  = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
364
        err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes);
365
        return err;
366
}
367
 
368
static inline int get_compat_msqid(struct msqid64_ds *m,
369
                                   struct compat_msqid_ds __user *up)
370
{
371
        int err;
372
 
373
        if (!access_ok(VERIFY_READ, up, sizeof(*up)))
374
                return -EFAULT;
375
        err  = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
376
        err |= __get_user(m->msg_qbytes, &up->msg_qbytes);
377
        return err;
378
}
379
 
380
static inline int put_compat_msqid64_ds(struct msqid64_ds *m64,
381
                                 struct compat_msqid64_ds __user *up64)
382
{
383
        int err;
384
 
385
        if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
386
                return -EFAULT;
387
        err  = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
388
        err |= __put_user(m64->msg_stime, &up64->msg_stime);
389
        err |= __put_user(m64->msg_rtime, &up64->msg_rtime);
390
        err |= __put_user(m64->msg_ctime, &up64->msg_ctime);
391
        err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes);
392
        err |= __put_user(m64->msg_qnum, &up64->msg_qnum);
393
        err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes);
394
        err |= __put_user(m64->msg_lspid, &up64->msg_lspid);
395
        err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid);
396
        return err;
397
}
398
 
399
static inline int put_compat_msqid_ds(struct msqid64_ds *m,
400
                                      struct compat_msqid_ds __user *up)
401
{
402
        int err;
403
 
404
        if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
405
                return -EFAULT;
406
        err  = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
407
        err |= __put_user(m->msg_stime, &up->msg_stime);
408
        err |= __put_user(m->msg_rtime, &up->msg_rtime);
409
        err |= __put_user(m->msg_ctime, &up->msg_ctime);
410
        err |= __put_user(m->msg_cbytes, &up->msg_cbytes);
411
        err |= __put_user(m->msg_qnum, &up->msg_qnum);
412
        err |= __put_user(m->msg_qbytes, &up->msg_qbytes);
413
        err |= __put_user(m->msg_lspid, &up->msg_lspid);
414
        err |= __put_user(m->msg_lrpid, &up->msg_lrpid);
415
        return err;
416
}
417
 
418
long compat_sys_msgctl(int first, int second, void __user *uptr)
419
{
420
        int err, err2;
421
        struct msqid64_ds m64;
422
        int version = compat_ipc_parse_version(&second);
423
        void __user *p;
424
 
425
        switch (second & (~IPC_64)) {
426
        case IPC_INFO:
427
        case IPC_RMID:
428
        case MSG_INFO:
429
                err = sys_msgctl(first, second, uptr);
430
                break;
431
 
432
        case IPC_SET:
433
                if (version == IPC_64) {
434
                        err = get_compat_msqid64(&m64, uptr);
435
                } else {
436
                        err = get_compat_msqid(&m64, uptr);
437
                }
438
                if (err)
439
                        break;
440
                p = compat_alloc_user_space(sizeof(m64));
441
                if (copy_to_user(p, &m64, sizeof(m64)))
442
                        err = -EFAULT;
443
                else
444
                        err = sys_msgctl(first, second, p);
445
                break;
446
 
447
        case IPC_STAT:
448
        case MSG_STAT:
449
                p = compat_alloc_user_space(sizeof(m64));
450
                err = sys_msgctl(first, second, p);
451
                if (err < 0)
452
                        break;
453
                if (copy_from_user(&m64, p, sizeof(m64)))
454
                        err2 = -EFAULT;
455
                else if (version == IPC_64)
456
                        err2 = put_compat_msqid64_ds(&m64, uptr);
457
                else
458
                        err2 = put_compat_msqid_ds(&m64, uptr);
459
                if (err2)
460
                        err = -EFAULT;
461
                break;
462
 
463
        default:
464
                err = -EINVAL;
465
                break;
466
        }
467
        return err;
468
}
469
 
470
long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
471
                        void __user *uptr)
472
{
473
        int err;
474
        unsigned long raddr;
475
        compat_ulong_t __user *uaddr;
476
 
477
        if (version == 1)
478
                return -EINVAL;
479
        err = do_shmat(first, uptr, second, &raddr);
480
        if (err < 0)
481
                return err;
482
        uaddr = compat_ptr(third);
483
        return put_user(raddr, uaddr);
484
}
485
 
486
static inline int get_compat_shmid64_ds(struct shmid64_ds *s64,
487
                                        struct compat_shmid64_ds __user *up64)
488
{
489
        if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
490
                return -EFAULT;
491
        return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
492
}
493
 
494
static inline int get_compat_shmid_ds(struct shmid64_ds *s,
495
                                      struct compat_shmid_ds __user *up)
496
{
497
        if (!access_ok(VERIFY_READ, up, sizeof(*up)))
498
                return -EFAULT;
499
        return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
500
}
501
 
502
static inline int put_compat_shmid64_ds(struct shmid64_ds *s64,
503
                                        struct compat_shmid64_ds __user *up64)
504
{
505
        int err;
506
 
507
        if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
508
                return -EFAULT;
509
        err  = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
510
        err |= __put_user(s64->shm_atime, &up64->shm_atime);
511
        err |= __put_user(s64->shm_dtime, &up64->shm_dtime);
512
        err |= __put_user(s64->shm_ctime, &up64->shm_ctime);
513
        err |= __put_user(s64->shm_segsz, &up64->shm_segsz);
514
        err |= __put_user(s64->shm_nattch, &up64->shm_nattch);
515
        err |= __put_user(s64->shm_cpid, &up64->shm_cpid);
516
        err |= __put_user(s64->shm_lpid, &up64->shm_lpid);
517
        return err;
518
}
519
 
520
static inline int put_compat_shmid_ds(struct shmid64_ds *s,
521
                                      struct compat_shmid_ds __user *up)
522
{
523
        int err;
524
 
525
        if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
526
                return -EFAULT;
527
        err  = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
528
        err |= __put_user(s->shm_atime, &up->shm_atime);
529
        err |= __put_user(s->shm_dtime, &up->shm_dtime);
530
        err |= __put_user(s->shm_ctime, &up->shm_ctime);
531
        err |= __put_user(s->shm_segsz, &up->shm_segsz);
532
        err |= __put_user(s->shm_nattch, &up->shm_nattch);
533
        err |= __put_user(s->shm_cpid, &up->shm_cpid);
534
        err |= __put_user(s->shm_lpid, &up->shm_lpid);
535
        return err;
536
}
537
 
538
static inline int put_compat_shminfo64(struct shminfo64 *smi,
539
                                       struct compat_shminfo64 __user *up64)
540
{
541
        int err;
542
 
543
        if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
544
                return -EFAULT;
545
        if (smi->shmmax > INT_MAX)
546
                smi->shmmax = INT_MAX;
547
        err  = __put_user(smi->shmmax, &up64->shmmax);
548
        err |= __put_user(smi->shmmin, &up64->shmmin);
549
        err |= __put_user(smi->shmmni, &up64->shmmni);
550
        err |= __put_user(smi->shmseg, &up64->shmseg);
551
        err |= __put_user(smi->shmall, &up64->shmall);
552
        return err;
553
}
554
 
555
static inline int put_compat_shminfo(struct shminfo64 *smi,
556
                                     struct shminfo __user *up)
557
{
558
        int err;
559
 
560
        if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
561
                return -EFAULT;
562
        if (smi->shmmax > INT_MAX)
563
                smi->shmmax = INT_MAX;
564
        err  = __put_user(smi->shmmax, &up->shmmax);
565
        err |= __put_user(smi->shmmin, &up->shmmin);
566
        err |= __put_user(smi->shmmni, &up->shmmni);
567
        err |= __put_user(smi->shmseg, &up->shmseg);
568
        err |= __put_user(smi->shmall, &up->shmall);
569
        return err;
570
}
571
 
572
static inline int put_compat_shm_info(struct shm_info __user *ip,
573
                                      struct compat_shm_info __user *uip)
574
{
575
        int err;
576
        struct shm_info si;
577
 
578
        if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) ||
579
            copy_from_user(&si, ip, sizeof(si)))
580
                return -EFAULT;
581
        err  = __put_user(si.used_ids, &uip->used_ids);
582
        err |= __put_user(si.shm_tot, &uip->shm_tot);
583
        err |= __put_user(si.shm_rss, &uip->shm_rss);
584
        err |= __put_user(si.shm_swp, &uip->shm_swp);
585
        err |= __put_user(si.swap_attempts, &uip->swap_attempts);
586
        err |= __put_user(si.swap_successes, &uip->swap_successes);
587
        return err;
588
}
589
 
590
long compat_sys_shmctl(int first, int second, void __user *uptr)
591
{
592
        void __user *p;
593
        struct shmid64_ds s64;
594
        struct shminfo64 smi;
595
        int err, err2;
596
        int version = compat_ipc_parse_version(&second);
597
 
598
        switch (second & (~IPC_64)) {
599
        case IPC_RMID:
600
        case SHM_LOCK:
601
        case SHM_UNLOCK:
602
                err = sys_shmctl(first, second, uptr);
603
                break;
604
 
605
        case IPC_INFO:
606
                p = compat_alloc_user_space(sizeof(smi));
607
                err = sys_shmctl(first, second, p);
608
                if (err < 0)
609
                        break;
610
                if (copy_from_user(&smi, p, sizeof(smi)))
611
                        err2 = -EFAULT;
612
                else if (version == IPC_64)
613
                        err2 = put_compat_shminfo64(&smi, uptr);
614
                else
615
                        err2 = put_compat_shminfo(&smi, uptr);
616
                if (err2)
617
                        err = -EFAULT;
618
                break;
619
 
620
 
621
        case IPC_SET:
622
                if (version == IPC_64) {
623
                        err = get_compat_shmid64_ds(&s64, uptr);
624
                } else {
625
                        err = get_compat_shmid_ds(&s64, uptr);
626
                }
627
                if (err)
628
                        break;
629
                p = compat_alloc_user_space(sizeof(s64));
630
                if (copy_to_user(p, &s64, sizeof(s64)))
631
                        err = -EFAULT;
632
                else
633
                        err = sys_shmctl(first, second, p);
634
                break;
635
 
636
        case IPC_STAT:
637
        case SHM_STAT:
638
                p = compat_alloc_user_space(sizeof(s64));
639
                err = sys_shmctl(first, second, p);
640
                if (err < 0)
641
                        break;
642
                if (copy_from_user(&s64, p, sizeof(s64)))
643
                        err2 = -EFAULT;
644
                else if (version == IPC_64)
645
                        err2 = put_compat_shmid64_ds(&s64, uptr);
646
                else
647
                        err2 = put_compat_shmid_ds(&s64, uptr);
648
                if (err2)
649
                        err = -EFAULT;
650
                break;
651
 
652
        case SHM_INFO:
653
                p = compat_alloc_user_space(sizeof(struct shm_info));
654
                err = sys_shmctl(first, second, p);
655
                if (err < 0)
656
                        break;
657
                err2 = put_compat_shm_info(p, uptr);
658
                if (err2)
659
                        err = -EFAULT;
660
                break;
661
 
662
        default:
663
                err = -EINVAL;
664
                break;
665
        }
666
        return err;
667
}
668
 
669
long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
670
                unsigned nsops, const struct compat_timespec __user *timeout)
671
{
672
        struct timespec __user *ts64 = NULL;
673
        if (timeout) {
674
                struct timespec ts;
675
                ts64 = compat_alloc_user_space(sizeof(*ts64));
676
                if (get_compat_timespec(&ts, timeout))
677
                        return -EFAULT;
678
                if (copy_to_user(ts64, &ts, sizeof(ts)))
679
                        return -EFAULT;
680
        }
681
        return sys_semtimedop(semid, tsems, nsops, ts64);
682
}

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