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[CONNECTOR]: Use netlink_has_listeners() to avoind unnecessary allocations.
[linux-2.6/verdex.git] / arch / alpha / kernel / osf_sys.c
blob7fb14f42a12519938dd6840e48f1ef3c8e66abf6
1 /*
2 * linux/arch/alpha/kernel/osf_sys.c
3 *
4 * Copyright (C) 1995 Linus Torvalds
5 */
6
7 /*
8 * This file handles some of the stranger OSF/1 system call interfaces.
9 * Some of the system calls expect a non-C calling standard, others have
10 * special parameter blocks..
11 */
12
13 #include <linux/errno.h>
14 #include <linux/sched.h>
15 #include <linux/kernel.h>
16 #include <linux/mm.h>
17 #include <linux/smp.h>
18 #include <linux/smp_lock.h>
19 #include <linux/stddef.h>
20 #include <linux/syscalls.h>
21 #include <linux/unistd.h>
22 #include <linux/ptrace.h>
23 #include <linux/slab.h>
24 #include <linux/user.h>
25 #include <linux/a.out.h>
26 #include <linux/utsname.h>
27 #include <linux/time.h>
28 #include <linux/timex.h>
29 #include <linux/major.h>
30 #include <linux/stat.h>
31 #include <linux/mman.h>
32 #include <linux/shm.h>
33 #include <linux/poll.h>
34 #include <linux/file.h>
35 #include <linux/types.h>
36 #include <linux/ipc.h>
37 #include <linux/namei.h>
38 #include <linux/uio.h>
39 #include <linux/vfs.h>
40 #include <linux/rcupdate.h>
41
42 #include <asm/fpu.h>
43 #include <asm/io.h>
44 #include <asm/uaccess.h>
45 #include <asm/system.h>
46 #include <asm/sysinfo.h>
47 #include <asm/hwrpb.h>
48 #include <asm/processor.h>
49
50 extern int do_pipe(int *);
51
52 /*
53 * Brk needs to return an error. Still support Linux's brk(0) query idiom,
54 * which OSF programs just shouldn't be doing. We're still not quite
55 * identical to OSF as we don't return 0 on success, but doing otherwise
56 * would require changes to libc. Hopefully this is good enough.
57 */
58 asmlinkage unsigned long
59 osf_brk(unsigned long brk)
60 {
61 unsigned long retval = sys_brk(brk);
62 if (brk && brk != retval)
63 retval = -ENOMEM;
64 return retval;
65 }
66
67 /*
68 * This is pure guess-work..
69 */
70 asmlinkage int
71 osf_set_program_attributes(unsigned long text_start, unsigned long text_len,
72 unsigned long bss_start, unsigned long bss_len)
73 {
74 struct mm_struct *mm;
75
76 lock_kernel();
77 mm = current->mm;
78 mm->end_code = bss_start + bss_len;
79 mm->brk = bss_start + bss_len;
80 #if 0
81 printk("set_program_attributes(%lx %lx %lx %lx)\n",
82 text_start, text_len, bss_start, bss_len);
83 #endif
84 unlock_kernel();
85 return 0;
86 }
87
88 /*
89 * OSF/1 directory handling functions...
90 *
91 * The "getdents()" interface is much more sane: the "basep" stuff is
92 * braindamage (it can't really handle filesystems where the directory
93 * offset differences aren't the same as "d_reclen").
94 */
95 #define NAME_OFFSET offsetof (struct osf_dirent, d_name)
96 #define ROUND_UP(x) (((x)+3) & ~3)
97
98 struct osf_dirent {
99 unsigned int d_ino;
100 unsigned short d_reclen;
101 unsigned short d_namlen;
102 char d_name[1];
103 };
104
105 struct osf_dirent_callback {
106 struct osf_dirent __user *dirent;
107 long __user *basep;
108 unsigned int count;
109 int error;
110 };
111
112 static int
113 osf_filldir(void *__buf, const char *name, int namlen, loff_t offset,
114 ino_t ino, unsigned int d_type)
115 {
116 struct osf_dirent __user *dirent;
117 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf;
118 unsigned int reclen = ROUND_UP(NAME_OFFSET + namlen + 1);
119
120 buf->error = -EINVAL; /* only used if we fail */
121 if (reclen > buf->count)
122 return -EINVAL;
123 if (buf->basep) {
124 if (put_user(offset, buf->basep))
125 return -EFAULT;
126 buf->basep = NULL;
127 }
128 dirent = buf->dirent;
129 put_user(ino, &dirent->d_ino);
130 put_user(namlen, &dirent->d_namlen);
131 put_user(reclen, &dirent->d_reclen);
132 if (copy_to_user(dirent->d_name, name, namlen) ||
133 put_user(0, dirent->d_name + namlen))
134 return -EFAULT;
135 dirent = (void __user *)dirent + reclen;
136 buf->dirent = dirent;
137 buf->count -= reclen;
138 return 0;
139 }
140
141 asmlinkage int
142 osf_getdirentries(unsigned int fd, struct osf_dirent __user *dirent,
143 unsigned int count, long __user *basep)
144 {
145 int error;
146 struct file *file;
147 struct osf_dirent_callback buf;
148
149 error = -EBADF;
150 file = fget(fd);
151 if (!file)
152 goto out;
153
154 buf.dirent = dirent;
155 buf.basep = basep;
156 buf.count = count;
157 buf.error = 0;
158
159 error = vfs_readdir(file, osf_filldir, &buf);
160 if (error < 0)
161 goto out_putf;
162
163 error = buf.error;
164 if (count != buf.count)
165 error = count - buf.count;
166
167 out_putf:
168 fput(file);
169 out:
170 return error;
171 }
172
173 #undef ROUND_UP
174 #undef NAME_OFFSET
175
176 asmlinkage unsigned long
177 osf_mmap(unsigned long addr, unsigned long len, unsigned long prot,
178 unsigned long flags, unsigned long fd, unsigned long off)
179 {
180 struct file *file = NULL;
181 unsigned long ret = -EBADF;
182
183 #if 0
184 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
185 printk("%s: unimplemented OSF mmap flags %04lx\n",
186 current->comm, flags);
187 #endif
188 if (!(flags & MAP_ANONYMOUS)) {
189 file = fget(fd);
190 if (!file)
191 goto out;
192 }
193 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
194 down_write(&current->mm->mmap_sem);
195 ret = do_mmap(file, addr, len, prot, flags, off);
196 up_write(&current->mm->mmap_sem);
197 if (file)
198 fput(file);
199 out:
200 return ret;
201 }
202
203
204 /*
205 * The OSF/1 statfs structure is much larger, but this should
206 * match the beginning, at least.
207 */
208 struct osf_statfs {
209 short f_type;
210 short f_flags;
211 int f_fsize;
212 int f_bsize;
213 int f_blocks;
214 int f_bfree;
215 int f_bavail;
216 int f_files;
217 int f_ffree;
218 __kernel_fsid_t f_fsid;
219 };
220
221 static int
222 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
223 unsigned long bufsiz)
224 {
225 struct osf_statfs tmp_stat;
226
227 tmp_stat.f_type = linux_stat->f_type;
228 tmp_stat.f_flags = 0; /* mount flags */
229 tmp_stat.f_fsize = linux_stat->f_frsize;
230 tmp_stat.f_bsize = linux_stat->f_bsize;
231 tmp_stat.f_blocks = linux_stat->f_blocks;
232 tmp_stat.f_bfree = linux_stat->f_bfree;
233 tmp_stat.f_bavail = linux_stat->f_bavail;
234 tmp_stat.f_files = linux_stat->f_files;
235 tmp_stat.f_ffree = linux_stat->f_ffree;
236 tmp_stat.f_fsid = linux_stat->f_fsid;
237 if (bufsiz > sizeof(tmp_stat))
238 bufsiz = sizeof(tmp_stat);
239 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
240 }
241
242 static int
243 do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer,
244 unsigned long bufsiz)
245 {
246 struct kstatfs linux_stat;
247 int error = vfs_statfs(dentry->d_inode->i_sb, &linux_stat);
248 if (!error)
249 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
250 return error;
251 }
252
253 asmlinkage int
254 osf_statfs(char __user *path, struct osf_statfs __user *buffer, unsigned long bufsiz)
255 {
256 struct nameidata nd;
257 int retval;
258
259 retval = user_path_walk(path, &nd);
260 if (!retval) {
261 retval = do_osf_statfs(nd.dentry, buffer, bufsiz);
262 path_release(&nd);
263 }
264 return retval;
265 }
266
267 asmlinkage int
268 osf_fstatfs(unsigned long fd, struct osf_statfs __user *buffer, unsigned long bufsiz)
269 {
270 struct file *file;
271 int retval;
272
273 retval = -EBADF;
274 file = fget(fd);
275 if (file) {
276 retval = do_osf_statfs(file->f_dentry, buffer, bufsiz);
277 fput(file);
278 }
279 return retval;
280 }
281
282 /*
283 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
284 *
285 * Although to be frank, neither are the native Linux/i386 ones..
286 */
287 struct ufs_args {
288 char __user *devname;
289 int flags;
290 uid_t exroot;
291 };
292
293 struct cdfs_args {
294 char __user *devname;
295 int flags;
296 uid_t exroot;
297
298 /* This has lots more here, which Linux handles with the option block
299 but I'm too lazy to do the translation into ASCII. */
300 };
301
302 struct procfs_args {
303 char __user *devname;
304 int flags;
305 uid_t exroot;
306 };
307
308 /*
309 * We can't actually handle ufs yet, so we translate UFS mounts to
310 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
311 * layout is so braindead it's a major headache doing it.
312 *
313 * Just how long ago was it written? OTOH our UFS driver may be still
314 * unhappy with OSF UFS. [CHECKME]
315 */
316 static int
317 osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
318 {
319 int retval;
320 struct cdfs_args tmp;
321 char *devname;
322
323 retval = -EFAULT;
324 if (copy_from_user(&tmp, args, sizeof(tmp)))
325 goto out;
326 devname = getname(tmp.devname);
327 retval = PTR_ERR(devname);
328 if (IS_ERR(devname))
329 goto out;
330 retval = do_mount(devname, dirname, "ext2", flags, NULL);
331 putname(devname);
332 out:
333 return retval;
334 }
335
336 static int
337 osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags)
338 {
339 int retval;
340 struct cdfs_args tmp;
341 char *devname;
342
343 retval = -EFAULT;
344 if (copy_from_user(&tmp, args, sizeof(tmp)))
345 goto out;
346 devname = getname(tmp.devname);
347 retval = PTR_ERR(devname);
348 if (IS_ERR(devname))
349 goto out;
350 retval = do_mount(devname, dirname, "iso9660", flags, NULL);
351 putname(devname);
352 out:
353 return retval;
354 }
355
356 static int
357 osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags)
358 {
359 struct procfs_args tmp;
360
361 if (copy_from_user(&tmp, args, sizeof(tmp)))
362 return -EFAULT;
363
364 return do_mount("", dirname, "proc", flags, NULL);
365 }
366
367 asmlinkage int
368 osf_mount(unsigned long typenr, char __user *path, int flag, void __user *data)
369 {
370 int retval = -EINVAL;
371 char *name;
372
373 lock_kernel();
374
375 name = getname(path);
376 retval = PTR_ERR(name);
377 if (IS_ERR(name))
378 goto out;
379 switch (typenr) {
380 case 1:
381 retval = osf_ufs_mount(name, data, flag);
382 break;
383 case 6:
384 retval = osf_cdfs_mount(name, data, flag);
385 break;
386 case 9:
387 retval = osf_procfs_mount(name, data, flag);
388 break;
389 default:
390 printk("osf_mount(%ld, %x)\n", typenr, flag);
391 }
392 putname(name);
393 out:
394 unlock_kernel();
395 return retval;
396 }
397
398 asmlinkage int
399 osf_utsname(char __user *name)
400 {
401 int error;
402
403 down_read(&uts_sem);
404 error = -EFAULT;
405 if (copy_to_user(name + 0, system_utsname.sysname, 32))
406 goto out;
407 if (copy_to_user(name + 32, system_utsname.nodename, 32))
408 goto out;
409 if (copy_to_user(name + 64, system_utsname.release, 32))
410 goto out;
411 if (copy_to_user(name + 96, system_utsname.version, 32))
412 goto out;
413 if (copy_to_user(name + 128, system_utsname.machine, 32))
414 goto out;
415
416 error = 0;
417 out:
418 up_read(&uts_sem);
419 return error;
420 }
421
422 asmlinkage unsigned long
423 sys_getpagesize(void)
424 {
425 return PAGE_SIZE;
426 }
427
428 asmlinkage unsigned long
429 sys_getdtablesize(void)
430 {
431 return NR_OPEN;
432 }
433
434 /*
435 * For compatibility with OSF/1 only. Use utsname(2) instead.
436 */
437 asmlinkage int
438 osf_getdomainname(char __user *name, int namelen)
439 {
440 unsigned len;
441 int i;
442
443 if (!access_ok(VERIFY_WRITE, name, namelen))
444 return -EFAULT;
445
446 len = namelen;
447 if (namelen > 32)
448 len = 32;
449
450 down_read(&uts_sem);
451 for (i = 0; i < len; ++i) {
452 __put_user(system_utsname.domainname[i], name + i);
453 if (system_utsname.domainname[i] == '\0')
454 break;
455 }
456 up_read(&uts_sem);
457
458 return 0;
459 }
460
461 /*
462 * The following stuff should move into a header file should it ever
463 * be labeled "officially supported." Right now, there is just enough
464 * support to avoid applications (such as tar) printing error
465 * messages. The attributes are not really implemented.
466 */
467
468 /*
469 * Values for Property list entry flag
470 */
471 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
472 by default */
473 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
474 #define PLE_FLAG_ALL -1 /* All flag value */
475
476 struct proplistname_args {
477 unsigned int pl_mask;
478 unsigned int pl_numnames;
479 char **pl_names;
480 };
481
482 union pl_args {
483 struct setargs {
484 char __user *path;
485 long follow;
486 long nbytes;
487 char __user *buf;
488 } set;
489 struct fsetargs {
490 long fd;
491 long nbytes;
492 char __user *buf;
493 } fset;
494 struct getargs {
495 char __user *path;
496 long follow;
497 struct proplistname_args __user *name_args;
498 long nbytes;
499 char __user *buf;
500 int __user *min_buf_size;
501 } get;
502 struct fgetargs {
503 long fd;
504 struct proplistname_args __user *name_args;
505 long nbytes;
506 char __user *buf;
507 int __user *min_buf_size;
508 } fget;
509 struct delargs {
510 char __user *path;
511 long follow;
512 struct proplistname_args __user *name_args;
513 } del;
514 struct fdelargs {
515 long fd;
516 struct proplistname_args __user *name_args;
517 } fdel;
518 };
519
520 enum pl_code {
521 PL_SET = 1, PL_FSET = 2,
522 PL_GET = 3, PL_FGET = 4,
523 PL_DEL = 5, PL_FDEL = 6
524 };
525
526 asmlinkage long
527 osf_proplist_syscall(enum pl_code code, union pl_args __user *args)
528 {
529 long error;
530 int __user *min_buf_size_ptr;
531
532 lock_kernel();
533 switch (code) {
534 case PL_SET:
535 if (get_user(error, &args->set.nbytes))
536 error = -EFAULT;
537 break;
538 case PL_FSET:
539 if (get_user(error, &args->fset.nbytes))
540 error = -EFAULT;
541 break;
542 case PL_GET:
543 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
544 if (error)
545 break;
546 error = put_user(0, min_buf_size_ptr);
547 break;
548 case PL_FGET:
549 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
550 if (error)
551 break;
552 error = put_user(0, min_buf_size_ptr);
553 break;
554 case PL_DEL:
555 case PL_FDEL:
556 error = 0;
557 break;
558 default:
559 error = -EOPNOTSUPP;
560 break;
561 };
562 unlock_kernel();
563 return error;
564 }
565
566 asmlinkage int
567 osf_sigstack(struct sigstack __user *uss, struct sigstack __user *uoss)
568 {
569 unsigned long usp = rdusp();
570 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
571 unsigned long oss_os = on_sig_stack(usp);
572 int error;
573
574 if (uss) {
575 void __user *ss_sp;
576
577 error = -EFAULT;
578 if (get_user(ss_sp, &uss->ss_sp))
579 goto out;
580
581 /* If the current stack was set with sigaltstack, don't
582 swap stacks while we are on it. */
583 error = -EPERM;
584 if (current->sas_ss_sp && on_sig_stack(usp))
585 goto out;
586
587 /* Since we don't know the extent of the stack, and we don't
588 track onstack-ness, but rather calculate it, we must
589 presume a size. Ho hum this interface is lossy. */
590 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
591 current->sas_ss_size = SIGSTKSZ;
592 }
593
594 if (uoss) {
595 error = -EFAULT;
596 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
597 || __put_user(oss_sp, &uoss->ss_sp)
598 || __put_user(oss_os, &uoss->ss_onstack))
599 goto out;
600 }
601
602 error = 0;
603 out:
604 return error;
605 }
606
607 asmlinkage long
608 osf_sysinfo(int command, char __user *buf, long count)
609 {
610 static char * sysinfo_table[] = {
611 system_utsname.sysname,
612 system_utsname.nodename,
613 system_utsname.release,
614 system_utsname.version,
615 system_utsname.machine,
616 "alpha", /* instruction set architecture */
617 "dummy", /* hardware serial number */
618 "dummy", /* hardware manufacturer */
619 "dummy", /* secure RPC domain */
620 };
621 unsigned long offset;
622 char *res;
623 long len, err = -EINVAL;
624
625 offset = command-1;
626 if (offset >= sizeof(sysinfo_table)/sizeof(char *)) {
627 /* Digital UNIX has a few unpublished interfaces here */
628 printk("sysinfo(%d)", command);
629 goto out;
630 }
631
632 down_read(&uts_sem);
633 res = sysinfo_table[offset];
634 len = strlen(res)+1;
635 if (len > count)
636 len = count;
637 if (copy_to_user(buf, res, len))
638 err = -EFAULT;
639 else
640 err = 0;
641 up_read(&uts_sem);
642 out:
643 return err;
644 }
645
646 asmlinkage unsigned long
647 osf_getsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes,
648 int __user *start, void __user *arg)
649 {
650 unsigned long w;
651 struct percpu_struct *cpu;
652
653 switch (op) {
654 case GSI_IEEE_FP_CONTROL:
655 /* Return current software fp control & status bits. */
656 /* Note that DU doesn't verify available space here. */
657
658 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
659 w = swcr_update_status(w, rdfpcr());
660 if (put_user(w, (unsigned long __user *) buffer))
661 return -EFAULT;
662 return 0;
663
664 case GSI_IEEE_STATE_AT_SIGNAL:
665 /*
666 * Not sure anybody will ever use this weird stuff. These
667 * ops can be used (under OSF/1) to set the fpcr that should
668 * be used when a signal handler starts executing.
669 */
670 break;
671
672 case GSI_UACPROC:
673 if (nbytes < sizeof(unsigned int))
674 return -EINVAL;
675 w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK;
676 if (put_user(w, (unsigned int __user *)buffer))
677 return -EFAULT;
678 return 1;
679
680 case GSI_PROC_TYPE:
681 if (nbytes < sizeof(unsigned long))
682 return -EINVAL;
683 cpu = (struct percpu_struct*)
684 ((char*)hwrpb + hwrpb->processor_offset);
685 w = cpu->type;
686 if (put_user(w, (unsigned long __user*)buffer))
687 return -EFAULT;
688 return 1;
689
690 case GSI_GET_HWRPB:
691 if (nbytes < sizeof(*hwrpb))
692 return -EINVAL;
693 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
694 return -EFAULT;
695 return 1;
696
697 default:
698 break;
699 }
700
701 return -EOPNOTSUPP;
702 }
703
704 asmlinkage unsigned long
705 osf_setsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes,
706 int __user *start, void __user *arg)
707 {
708 switch (op) {
709 case SSI_IEEE_FP_CONTROL: {
710 unsigned long swcr, fpcr;
711 unsigned int *state;
712
713 /*
714 * Alpha Architecture Handbook 4.7.7.3:
715 * To be fully IEEE compiant, we must track the current IEEE
716 * exception state in software, because spurrious bits can be
717 * set in the trap shadow of a software-complete insn.
718 */
719
720 if (get_user(swcr, (unsigned long __user *)buffer))
721 return -EFAULT;
722 state = &current_thread_info()->ieee_state;
723
724 /* Update softare trap enable bits. */
725 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
726
727 /* Update the real fpcr. */
728 fpcr = rdfpcr() & FPCR_DYN_MASK;
729 fpcr |= ieee_swcr_to_fpcr(swcr);
730 wrfpcr(fpcr);
731
732 return 0;
733 }
734
735 case SSI_IEEE_RAISE_EXCEPTION: {
736 unsigned long exc, swcr, fpcr, fex;
737 unsigned int *state;
738
739 if (get_user(exc, (unsigned long __user *)buffer))
740 return -EFAULT;
741 state = &current_thread_info()->ieee_state;
742 exc &= IEEE_STATUS_MASK;
743
744 /* Update softare trap enable bits. */
745 swcr = (*state & IEEE_SW_MASK) | exc;
746 *state |= exc;
747
748 /* Update the real fpcr. */
749 fpcr = rdfpcr();
750 fpcr |= ieee_swcr_to_fpcr(swcr);
751 wrfpcr(fpcr);
752
753 /* If any exceptions set by this call, and are unmasked,
754 send a signal. Old exceptions are not signaled. */
755 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
756 if (fex) {
757 siginfo_t info;
758 int si_code = 0;
759
760 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
761 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
762 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
763 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
764 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
765 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
766
767 info.si_signo = SIGFPE;
768 info.si_errno = 0;
769 info.si_code = si_code;
770 info.si_addr = NULL; /* FIXME */
771 send_sig_info(SIGFPE, &info, current);
772 }
773 return 0;
774 }
775
776 case SSI_IEEE_STATE_AT_SIGNAL:
777 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
778 /*
779 * Not sure anybody will ever use this weird stuff. These
780 * ops can be used (under OSF/1) to set the fpcr that should
781 * be used when a signal handler starts executing.
782 */
783 break;
784
785 case SSI_NVPAIRS: {
786 unsigned long v, w, i;
787 unsigned int old, new;
788
789 for (i = 0; i < nbytes; ++i) {
790
791 if (get_user(v, 2*i + (unsigned int __user *)buffer))
792 return -EFAULT;
793 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer))
794 return -EFAULT;
795 switch (v) {
796 case SSIN_UACPROC:
797 again:
798 old = current_thread_info()->flags;
799 new = old & ~(UAC_BITMASK << UAC_SHIFT);
800 new = new | (w & UAC_BITMASK) << UAC_SHIFT;
801 if (cmpxchg(&current_thread_info()->flags,
802 old, new) != old)
803 goto again;
804 break;
805
806 default:
807 return -EOPNOTSUPP;
808 }
809 }
810 return 0;
811 }
812
813 default:
814 break;
815 }
816
817 return -EOPNOTSUPP;
818 }
819
820 /* Translations due to the fact that OSF's time_t is an int. Which
821 affects all sorts of things, like timeval and itimerval. */
822
823 extern struct timezone sys_tz;
824 extern int do_adjtimex(struct timex *);
825
826 struct timeval32
827 {
828 int tv_sec, tv_usec;
829 };
830
831 struct itimerval32
832 {
833 struct timeval32 it_interval;
834 struct timeval32 it_value;
835 };
836
837 static inline long
838 get_tv32(struct timeval *o, struct timeval32 __user *i)
839 {
840 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
841 (__get_user(o->tv_sec, &i->tv_sec) |
842 __get_user(o->tv_usec, &i->tv_usec)));
843 }
844
845 static inline long
846 put_tv32(struct timeval32 __user *o, struct timeval *i)
847 {
848 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
849 (__put_user(i->tv_sec, &o->tv_sec) |
850 __put_user(i->tv_usec, &o->tv_usec)));
851 }
852
853 static inline long
854 get_it32(struct itimerval *o, struct itimerval32 __user *i)
855 {
856 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
857 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
858 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
859 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
860 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
861 }
862
863 static inline long
864 put_it32(struct itimerval32 __user *o, struct itimerval *i)
865 {
866 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
867 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
868 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
869 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
870 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
871 }
872
873 static inline void
874 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
875 {
876 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
877 value->tv_sec = jiffies / HZ;
878 }
879
880 asmlinkage int
881 osf_gettimeofday(struct timeval32 __user *tv, struct timezone __user *tz)
882 {
883 if (tv) {
884 struct timeval ktv;
885 do_gettimeofday(&ktv);
886 if (put_tv32(tv, &ktv))
887 return -EFAULT;
888 }
889 if (tz) {
890 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
891 return -EFAULT;
892 }
893 return 0;
894 }
895
896 asmlinkage int
897 osf_settimeofday(struct timeval32 __user *tv, struct timezone __user *tz)
898 {
899 struct timespec kts;
900 struct timezone ktz;
901
902 if (tv) {
903 if (get_tv32((struct timeval *)&kts, tv))
904 return -EFAULT;
905 }
906 if (tz) {
907 if (copy_from_user(&ktz, tz, sizeof(*tz)))
908 return -EFAULT;
909 }
910
911 kts.tv_nsec *= 1000;
912
913 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
914 }
915
916 asmlinkage int
917 osf_getitimer(int which, struct itimerval32 __user *it)
918 {
919 struct itimerval kit;
920 int error;
921
922 error = do_getitimer(which, &kit);
923 if (!error && put_it32(it, &kit))
924 error = -EFAULT;
925
926 return error;
927 }
928
929 asmlinkage int
930 osf_setitimer(int which, struct itimerval32 __user *in, struct itimerval32 __user *out)
931 {
932 struct itimerval kin, kout;
933 int error;
934
935 if (in) {
936 if (get_it32(&kin, in))
937 return -EFAULT;
938 } else
939 memset(&kin, 0, sizeof(kin));
940
941 error = do_setitimer(which, &kin, out ? &kout : NULL);
942 if (error || !out)
943 return error;
944
945 if (put_it32(out, &kout))
946 return -EFAULT;
947
948 return 0;
949
950 }
951
952 asmlinkage int
953 osf_utimes(char __user *filename, struct timeval32 __user *tvs)
954 {
955 struct timeval ktvs[2];
956
957 if (tvs) {
958 if (get_tv32(&ktvs[0], &tvs[0]) ||
959 get_tv32(&ktvs[1], &tvs[1]))
960 return -EFAULT;
961 }
962
963 return do_utimes(AT_FDCWD, filename, tvs ? ktvs : NULL);
964 }
965
966 #define MAX_SELECT_SECONDS \
967 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
968
969 asmlinkage int
970 osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp,
971 struct timeval32 __user *tvp)
972 {
973 fd_set_bits fds;
974 char *bits;
975 size_t size;
976 long timeout;
977 int ret = -EINVAL;
978 struct fdtable *fdt;
979 int max_fdset;
980
981 timeout = MAX_SCHEDULE_TIMEOUT;
982 if (tvp) {
983 time_t sec, usec;
984
985 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
986 || __get_user(sec, &tvp->tv_sec)
987 || __get_user(usec, &tvp->tv_usec)) {
988 ret = -EFAULT;
989 goto out_nofds;
990 }
991
992 if (sec < 0 || usec < 0)
993 goto out_nofds;
994
995 if ((unsigned long) sec < MAX_SELECT_SECONDS) {
996 timeout = (usec + 1000000/HZ - 1) / (1000000/HZ);
997 timeout += sec * (unsigned long) HZ;
998 }
999 }
1000
1001 rcu_read_lock();
1002 fdt = files_fdtable(current->files);
1003 max_fdset = fdt->max_fdset;
1004 rcu_read_unlock();
1005 if (n < 0 || n > max_fdset)
1006 goto out_nofds;
1007
1008 /*
1009 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1010 * since we used fdset we need to allocate memory in units of
1011 * long-words.
1012 */
1013 ret = -ENOMEM;
1014 size = FDS_BYTES(n);
1015 bits = kmalloc(6 * size, GFP_KERNEL);
1016 if (!bits)
1017 goto out_nofds;
1018 fds.in = (unsigned long *) bits;
1019 fds.out = (unsigned long *) (bits + size);
1020 fds.ex = (unsigned long *) (bits + 2*size);
1021 fds.res_in = (unsigned long *) (bits + 3*size);
1022 fds.res_out = (unsigned long *) (bits + 4*size);
1023 fds.res_ex = (unsigned long *) (bits + 5*size);
1024
1025 if ((ret = get_fd_set(n, inp->fds_bits, fds.in)) ||
1026 (ret = get_fd_set(n, outp->fds_bits, fds.out)) ||
1027 (ret = get_fd_set(n, exp->fds_bits, fds.ex)))
1028 goto out;
1029 zero_fd_set(n, fds.res_in);
1030 zero_fd_set(n, fds.res_out);
1031 zero_fd_set(n, fds.res_ex);
1032
1033 ret = do_select(n, &fds, &timeout);
1034
1035 /* OSF does not copy back the remaining time. */
1036
1037 if (ret < 0)
1038 goto out;
1039 if (!ret) {
1040 ret = -ERESTARTNOHAND;
1041 if (signal_pending(current))
1042 goto out;
1043 ret = 0;
1044 }
1045
1046 if (set_fd_set(n, inp->fds_bits, fds.res_in) ||
1047 set_fd_set(n, outp->fds_bits, fds.res_out) ||
1048 set_fd_set(n, exp->fds_bits, fds.res_ex))
1049 ret = -EFAULT;
1050
1051 out:
1052 kfree(bits);
1053 out_nofds:
1054 return ret;
1055 }
1056
1057 struct rusage32 {
1058 struct timeval32 ru_utime; /* user time used */
1059 struct timeval32 ru_stime; /* system time used */
1060 long ru_maxrss; /* maximum resident set size */
1061 long ru_ixrss; /* integral shared memory size */
1062 long ru_idrss; /* integral unshared data size */
1063 long ru_isrss; /* integral unshared stack size */
1064 long ru_minflt; /* page reclaims */
1065 long ru_majflt; /* page faults */
1066 long ru_nswap; /* swaps */
1067 long ru_inblock; /* block input operations */
1068 long ru_oublock; /* block output operations */
1069 long ru_msgsnd; /* messages sent */
1070 long ru_msgrcv; /* messages received */
1071 long ru_nsignals; /* signals received */
1072 long ru_nvcsw; /* voluntary context switches */
1073 long ru_nivcsw; /* involuntary " */
1074 };
1075
1076 asmlinkage int
1077 osf_getrusage(int who, struct rusage32 __user *ru)
1078 {
1079 struct rusage32 r;
1080
1081 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1082 return -EINVAL;
1083
1084 memset(&r, 0, sizeof(r));
1085 switch (who) {
1086 case RUSAGE_SELF:
1087 jiffies_to_timeval32(current->utime, &r.ru_utime);
1088 jiffies_to_timeval32(current->stime, &r.ru_stime);
1089 r.ru_minflt = current->min_flt;
1090 r.ru_majflt = current->maj_flt;
1091 break;
1092 case RUSAGE_CHILDREN:
1093 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime);
1094 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime);
1095 r.ru_minflt = current->signal->cmin_flt;
1096 r.ru_majflt = current->signal->cmaj_flt;
1097 break;
1098 }
1099
1100 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1101 }
1102
1103 asmlinkage long
1104 osf_wait4(pid_t pid, int __user *ustatus, int options,
1105 struct rusage32 __user *ur)
1106 {
1107 struct rusage r;
1108 long ret, err;
1109 mm_segment_t old_fs;
1110
1111 if (!ur)
1112 return sys_wait4(pid, ustatus, options, NULL);
1113
1114 old_fs = get_fs();
1115
1116 set_fs (KERNEL_DS);
1117 ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r);
1118 set_fs (old_fs);
1119
1120 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1121 return -EFAULT;
1122
1123 err = 0;
1124 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1125 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1126 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1127 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1128 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1129 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1130 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1131 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1132 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1133 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1134 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1135 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1136 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1137 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1138 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1139 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1140 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1141 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1142
1143 return err ? err : ret;
1144 }
1145
1146 /*
1147 * I don't know what the parameters are: the first one
1148 * seems to be a timeval pointer, and I suspect the second
1149 * one is the time remaining.. Ho humm.. No documentation.
1150 */
1151 asmlinkage int
1152 osf_usleep_thread(struct timeval32 __user *sleep, struct timeval32 __user *remain)
1153 {
1154 struct timeval tmp;
1155 unsigned long ticks;
1156
1157 if (get_tv32(&tmp, sleep))
1158 goto fault;
1159
1160 ticks = timeval_to_jiffies(&tmp);
1161
1162 ticks = schedule_timeout_interruptible(ticks);
1163
1164 if (remain) {
1165 jiffies_to_timeval(ticks, &tmp);
1166 if (put_tv32(remain, &tmp))
1167 goto fault;
1168 }
1169
1170 return 0;
1171 fault:
1172 return -EFAULT;
1173 }
1174
1175
1176 struct timex32 {
1177 unsigned int modes; /* mode selector */
1178 long offset; /* time offset (usec) */
1179 long freq; /* frequency offset (scaled ppm) */
1180 long maxerror; /* maximum error (usec) */
1181 long esterror; /* estimated error (usec) */
1182 int status; /* clock command/status */
1183 long constant; /* pll time constant */
1184 long precision; /* clock precision (usec) (read only) */
1185 long tolerance; /* clock frequency tolerance (ppm)
1186 * (read only)
1187 */
1188 struct timeval32 time; /* (read only) */
1189 long tick; /* (modified) usecs between clock ticks */
1190
1191 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1192 long jitter; /* pps jitter (us) (ro) */
1193 int shift; /* interval duration (s) (shift) (ro) */
1194 long stabil; /* pps stability (scaled ppm) (ro) */
1195 long jitcnt; /* jitter limit exceeded (ro) */
1196 long calcnt; /* calibration intervals (ro) */
1197 long errcnt; /* calibration errors (ro) */
1198 long stbcnt; /* stability limit exceeded (ro) */
1199
1200 int :32; int :32; int :32; int :32;
1201 int :32; int :32; int :32; int :32;
1202 int :32; int :32; int :32; int :32;
1203 };
1204
1205 asmlinkage int
1206 sys_old_adjtimex(struct timex32 __user *txc_p)
1207 {
1208 struct timex txc;
1209 int ret;
1210
1211 /* copy relevant bits of struct timex. */
1212 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1213 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1214 offsetof(struct timex32, time)))
1215 return -EFAULT;
1216
1217 ret = do_adjtimex(&txc);
1218 if (ret < 0)
1219 return ret;
1220
1221 /* copy back to timex32 */
1222 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1223 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1224 offsetof(struct timex32, tick))) ||
1225 (put_tv32(&txc_p->time, &txc.time)))
1226 return -EFAULT;
1227
1228 return ret;
1229 }
1230
1231 /* Get an address range which is currently unmapped. Similar to the
1232 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1233
1234 static unsigned long
1235 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1236 unsigned long limit)
1237 {
1238 struct vm_area_struct *vma = find_vma(current->mm, addr);
1239
1240 while (1) {
1241 /* At this point: (!vma || addr < vma->vm_end). */
1242 if (limit - len < addr)
1243 return -ENOMEM;
1244 if (!vma || addr + len <= vma->vm_start)
1245 return addr;
1246 addr = vma->vm_end;
1247 vma = vma->vm_next;
1248 }
1249 }
1250
1251 unsigned long
1252 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1253 unsigned long len, unsigned long pgoff,
1254 unsigned long flags)
1255 {
1256 unsigned long limit;
1257
1258 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1259 if (current->personality & ADDR_LIMIT_32BIT)
1260 limit = 0x80000000;
1261 else
1262 limit = TASK_SIZE;
1263
1264 if (len > limit)
1265 return -ENOMEM;
1266
1267 /* First, see if the given suggestion fits.
1268
1269 The OSF/1 loader (/sbin/loader) relies on us returning an
1270 address larger than the requested if one exists, which is
1271 a terribly broken way to program.
1272
1273 That said, I can see the use in being able to suggest not
1274 merely specific addresses, but regions of memory -- perhaps
1275 this feature should be incorporated into all ports? */
1276
1277 if (addr) {
1278 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1279 if (addr != (unsigned long) -ENOMEM)
1280 return addr;
1281 }
1282
1283 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1284 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1285 len, limit);
1286 if (addr != (unsigned long) -ENOMEM)
1287 return addr;
1288
1289 /* Finally, try allocating in low memory. */
1290 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1291
1292 return addr;
1293 }
1294
1295 #ifdef CONFIG_OSF4_COMPAT
1296
1297 /* Clear top 32 bits of iov_len in the user's buffer for
1298 compatibility with old versions of OSF/1 where iov_len
1299 was defined as int. */
1300 static int
1301 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1302 {
1303 unsigned long i;
1304
1305 for (i = 0 ; i < count ; i++) {
1306 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1307
1308 if (put_user(0, iov_len_high))
1309 return -EFAULT;
1310 }
1311 return 0;
1312 }
1313
1314 asmlinkage ssize_t
1315 osf_readv(unsigned long fd, const struct iovec __user * vector, unsigned long count)
1316 {
1317 if (unlikely(personality(current->personality) == PER_OSF4))
1318 if (osf_fix_iov_len(vector, count))
1319 return -EFAULT;
1320 return sys_readv(fd, vector, count);
1321 }
1322
1323 asmlinkage ssize_t
1324 osf_writev(unsigned long fd, const struct iovec __user * vector, unsigned long count)
1325 {
1326 if (unlikely(personality(current->personality) == PER_OSF4))
1327 if (osf_fix_iov_len(vector, count))
1328 return -EFAULT;
1329 return sys_writev(fd, vector, count);
1330 }
1331
1332 #endif
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