summaryrefslogtreecommitdiffstats
path: root/arch/sparc/kernel/sys_sunos.c
blob: f807172cab0ea139d07ea70fb7c1e795708e013b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
/* $Id: sys_sunos.c,v 1.137 2002/02/08 03:57:14 davem Exp $
 * sys_sunos.c: SunOS specific syscall compatibility support.
 *
 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 * Copyright (C) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx)
 *
 * Based upon preliminary work which is:
 *
 * Copyright (C) 1995 Adrian M. Rodriguez (adrian@remus.rutgers.edu)
 *
 */

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/mman.h>
#include <linux/mm.h>
#include <linux/swap.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/resource.h>
#include <linux/ipc.h>
#include <linux/shm.h>
#include <linux/msg.h>
#include <linux/sem.h>
#include <linux/signal.h>
#include <linux/uio.h>
#include <linux/utsname.h>
#include <linux/major.h>
#include <linux/stat.h>
#include <linux/slab.h>
#include <linux/pagemap.h>
#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/syscalls.h>

#include <net/sock.h>

#include <asm/uaccess.h>
#ifndef KERNEL_DS
#include <linux/segment.h>
#endif

#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/pconf.h>
#include <asm/idprom.h> /* for gethostid() */
#include <asm/unistd.h>
#include <asm/system.h>

/* For the nfs mount emulation */
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/nfs.h>
#include <linux/nfs2.h>
#include <linux/nfs_mount.h>

/* for sunos_select */
#include <linux/time.h>
#include <linux/personality.h>

/* NR_OPEN is now larger and dynamic in recent kernels. */
#define SUNOS_NR_OPEN	256

/* We use the SunOS mmap() semantics. */
asmlinkage unsigned long sunos_mmap(unsigned long addr, unsigned long len,
				    unsigned long prot, unsigned long flags,
				    unsigned long fd, unsigned long off)
{
	struct file * file = NULL;
	unsigned long retval, ret_type;

	if (flags & MAP_NORESERVE) {
		static int cnt;
		if (cnt++ < 10)
			printk("%s: unimplemented SunOS MAP_NORESERVE mmap() flag\n",
			       current->comm);
		flags &= ~MAP_NORESERVE;
	}
	retval = -EBADF;
	if (!(flags & MAP_ANONYMOUS)) {
		if (fd >= SUNOS_NR_OPEN)
			goto out;
		file = fget(fd);
		if (!file)
			goto out;
	}

	retval = -EINVAL;
	/* If this is ld.so or a shared library doing an mmap
	 * of /dev/zero, transform it into an anonymous mapping.
	 * SunOS is so stupid some times... hmph!
	 */
	if (file) {
		if (imajor(file->f_path.dentry->d_inode) == MEM_MAJOR &&
		    iminor(file->f_path.dentry->d_inode) == 5) {
			flags |= MAP_ANONYMOUS;
			fput(file);
			file = NULL;
		}
	}
	ret_type = flags & _MAP_NEW;
	flags &= ~_MAP_NEW;

	if (!(flags & MAP_FIXED))
		addr = 0;
	else {
		if (ARCH_SUN4C_SUN4 &&
		    (len > 0x20000000 ||
		     ((flags & MAP_FIXED) &&
		      addr < 0xe0000000 && addr + len > 0x20000000)))
			goto out_putf;

		/* See asm-sparc/uaccess.h */
		if (len > TASK_SIZE - PAGE_SIZE ||
		    addr + len > TASK_SIZE - PAGE_SIZE)
			goto out_putf;
	}

	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
	down_write(&current->mm->mmap_sem);
	retval = do_mmap(file, addr, len, prot, flags, off);
	up_write(&current->mm->mmap_sem);
	if (!ret_type)
		retval = ((retval < PAGE_OFFSET) ? 0 : retval);

out_putf:
	if (file)
		fput(file);
out:
	return retval;
}

/* lmbench calls this, just say "yeah, ok" */
asmlinkage int sunos_mctl(unsigned long addr, unsigned long len, int function, char *arg)
{
	return 0;
}

/* SunOS is completely broken... it returns 0 on success, otherwise
 * ENOMEM.  For sys_sbrk() it wants the old brk value as a return
 * on success and ENOMEM as before on failure.
 */
asmlinkage int sunos_brk(unsigned long brk)
{
	int freepages, retval = -ENOMEM;
	unsigned long rlim;
	unsigned long newbrk, oldbrk;

	down_write(&current->mm->mmap_sem);
	if (ARCH_SUN4C_SUN4) {
		if (brk >= 0x20000000 && brk < 0xe0000000) {
			goto out;
		}
	}

	if (brk < current->mm->end_code)
		goto out;

	newbrk = PAGE_ALIGN(brk);
	oldbrk = PAGE_ALIGN(current->mm->brk);
	retval = 0;
	if (oldbrk == newbrk) {
		current->mm->brk = brk;
		goto out;
	}

	/*
	 * Always allow shrinking brk
	 */
	if (brk <= current->mm->brk) {
		current->mm->brk = brk;
		do_munmap(current->mm, newbrk, oldbrk-newbrk);
		goto out;
	}
	/*
	 * Check against rlimit and stack..
	 */
	retval = -ENOMEM;
	rlim = current->signal->rlim[RLIMIT_DATA].rlim_cur;
	if (rlim >= RLIM_INFINITY)
		rlim = ~0;
	if (brk - current->mm->end_code > rlim)
		goto out;

	/*
	 * Check against existing mmap mappings.
	 */
	if (find_vma_intersection(current->mm, oldbrk, newbrk+PAGE_SIZE))
		goto out;

	/*
	 * stupid algorithm to decide if we have enough memory: while
	 * simple, it hopefully works in most obvious cases.. Easy to
	 * fool it, but this should catch most mistakes.
	 */
	freepages = global_page_state(NR_FILE_PAGES);
	freepages >>= 1;
	freepages += nr_free_pages();
	freepages += nr_swap_pages;
	freepages -= num_physpages >> 4;
	freepages -= (newbrk-oldbrk) >> PAGE_SHIFT;
	if (freepages < 0)
		goto out;
	/*
	 * Ok, we have probably got enough memory - let it rip.
	 */
	current->mm->brk = brk;
	do_brk(oldbrk, newbrk-oldbrk);
	retval = 0;
out:
	up_write(&current->mm->mmap_sem);
	return retval;
}

asmlinkage unsigned long sunos_sbrk(int increment)
{
	int error;
	unsigned long oldbrk;

	/* This should do it hopefully... */
	lock_kernel();
	oldbrk = current->mm->brk;
	error = sunos_brk(((int) current->mm->brk) + increment);
	if (!error)
		error = oldbrk;
	unlock_kernel();
	return error;
}

/* XXX Completely undocumented, and completely magic...
 * XXX I believe it is to increase the size of the stack by
 * XXX argument 'increment' and return the new end of stack
 * XXX area.  Wheee...
 */
asmlinkage unsigned long sunos_sstk(int increment)
{
	lock_kernel();
	printk("%s: Call to sunos_sstk(increment<%d>) is unsupported\n",
	       current->comm, increment);
	unlock_kernel();
	return -1;
}

/* Give hints to the kernel as to what paging strategy to use...
 * Completely bogus, don't remind me.
 */
#define VA_NORMAL     0 /* Normal vm usage expected */
#define VA_ABNORMAL   1 /* Abnormal/random vm usage probable */
#define VA_SEQUENTIAL 2 /* Accesses will be of a sequential nature */
#define VA_INVALIDATE 3 /* Page table entries should be flushed ??? */
static char *vstrings[] = {
	"VA_NORMAL",
	"VA_ABNORMAL",
	"VA_SEQUENTIAL",
	"VA_INVALIDATE",
};

asmlinkage void sunos_vadvise(unsigned long strategy)
{
	/* I wanna see who uses this... */
	lock_kernel();
	printk("%s: Advises us to use %s paging strategy\n",
	       current->comm,
	       strategy <= 3 ? vstrings[strategy] : "BOGUS");
	unlock_kernel();
}

/* This just wants the soft limit (ie. rlim_cur element) of the RLIMIT_NOFILE
 * resource limit and is for backwards compatibility with older sunos
 * revs.
 */
asmlinkage long sunos_getdtablesize(void)
{
	return SUNOS_NR_OPEN;
}

#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))

asmlinkage unsigned long sunos_sigblock(unsigned long blk_mask)
{
	unsigned long old;

	spin_lock_irq(&current->sighand->siglock);
	old = current->blocked.sig[0];
	current->blocked.sig[0] |= (blk_mask & _BLOCKABLE);
	recalc_sigpending();
	spin_unlock_irq(&current->sighand->siglock);
	return old;
}

asmlinkage unsigned long sunos_sigsetmask(unsigned long newmask)
{
	unsigned long retval;

	spin_lock_irq(&current->sighand->siglock);
	retval = current->blocked.sig[0];
	current->blocked.sig[0] = (newmask & _BLOCKABLE);
	recalc_sigpending();
	spin_unlock_irq(&current->sighand->siglock);
	return retval;
}

/* SunOS getdents is very similar to the newer Linux (iBCS2 compliant)    */
/* getdents system call, the format of the structure just has a different */
/* layout (d_off+d_ino instead of d_ino+d_off) */
struct sunos_dirent {
    long           d_off;
    unsigned long  d_ino;
    unsigned short d_reclen;
    unsigned short d_namlen;
    char           d_name[1];
};

struct sunos_dirent_callback {
    struct sunos_dirent __user *curr;
    struct sunos_dirent __user *previous;
    int count;
    int error;
};

#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
#define ROUND_UP(x) (((x)+sizeof(long)-1) & ~(sizeof(long)-1))

static int sunos_filldir(void * __buf, const char * name, int namlen,
			 loff_t offset, u64 ino, unsigned int d_type)
{
	struct sunos_dirent __user *dirent;
	struct sunos_dirent_callback * buf = __buf;
	unsigned long d_ino;
	int reclen = ROUND_UP(NAME_OFFSET(dirent) + namlen + 1);

	buf->error = -EINVAL;	/* only used if we fail.. */
	if (reclen > buf->count)
		return -EINVAL;
	d_ino = ino;
	if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
		return -EOVERFLOW;
	dirent = buf->previous;
	if (dirent)
		put_user(offset, &dirent->d_off);
	dirent = buf->curr;
	buf->previous = dirent;
	put_user(d_ino, &dirent->d_ino);
	put_user(namlen, &dirent->d_namlen);
	put_user(reclen, &dirent->d_reclen);
	copy_to_user(dirent->d_name, name, namlen);
	put_user(0, dirent->d_name + namlen);
	dirent = (void __user *) dirent + reclen;
	buf->curr = dirent;
	buf->count -= reclen;
	return 0;
}

asmlinkage int sunos_getdents(unsigned int fd, void __user *dirent, int cnt)
{
	struct file * file;
	struct sunos_dirent __user *lastdirent;
	struct sunos_dirent_callback buf;
	int error = -EBADF;

	if (fd >= SUNOS_NR_OPEN)
		goto out;

	file = fget(fd);
	if (!file)
		goto out;

	error = -EINVAL;
	if (cnt < (sizeof(struct sunos_dirent) + 255))
		goto out_putf;

	buf.curr = (struct sunos_dirent __user *) dirent;
	buf.previous = NULL;
	buf.count = cnt;
	buf.error = 0;

	error = vfs_readdir(file, sunos_filldir, &buf);
	if (error < 0)
		goto out_putf;

	lastdirent = buf.previous;
	error = buf.error;
	if (lastdirent) {
		put_user(file->f_pos, &lastdirent->d_off);
		error = cnt - buf.count;
	}

out_putf:
	fput(file);
out:
	return error;
}

/* Old sunos getdirentries, severely broken compatibility stuff here. */
struct sunos_direntry {
    unsigned long  d_ino;
    unsigned short d_reclen;
    unsigned short d_namlen;
    char           d_name[1];
};

struct sunos_direntry_callback {
    struct sunos_direntry __user *curr;
    struct sunos_direntry __user *previous;
    int count;
    int error;
};

static int sunos_filldirentry(void * __buf, const char * name, int namlen,
			      loff_t offset, u64 ino, unsigned int d_type)
{
	struct sunos_direntry __user *dirent;
	struct sunos_direntry_callback *buf = __buf;
	unsigned long d_ino;
	int reclen = ROUND_UP(NAME_OFFSET(dirent) + namlen + 1);

	buf->error = -EINVAL;	/* only used if we fail.. */
	if (reclen > buf->count)
		return -EINVAL;
	d_ino = ino;
	if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
		return -EOVERFLOW;
	dirent = buf->previous;
	dirent = buf->curr;
	buf->previous = dirent;
	put_user(d_ino, &dirent->d_ino);
	put_user(namlen, &dirent->d_namlen);
	put_user(reclen, &dirent->d_reclen);
	copy_to_user(dirent->d_name, name, namlen);
	put_user(0, dirent->d_name + namlen);
	dirent = (void __user *) dirent + reclen;
	buf->curr = dirent;
	buf->count -= reclen;
	return 0;
}

asmlinkage int sunos_getdirentries(unsigned int fd, void __user *dirent,
				   int cnt, unsigned int __user *basep)
{
	struct file * file;
	struct sunos_direntry __user *lastdirent;
	struct sunos_direntry_callback buf;
	int error = -EBADF;

	if (fd >= SUNOS_NR_OPEN)
		goto out;

	file = fget(fd);
	if (!file)
		goto out;

	error = -EINVAL;
	if (cnt < (sizeof(struct sunos_direntry) + 255))
		goto out_putf;

	buf.curr = (struct sunos_direntry __user *) dirent;
	buf.previous = NULL;
	buf.count = cnt;
	buf.error = 0;

	error = vfs_readdir(file, sunos_filldirentry, &buf);
	if (error < 0)
		goto out_putf;

	lastdirent = buf.previous;
	error = buf.error;
	if (lastdirent) {
		put_user(file->f_pos, basep);
		error = cnt - buf.count;
	}

out_putf:
	fput(file);
out:
	return error;
}

struct sunos_utsname {
	char sname[9];
	char nname[9];
	char nnext[56];
	char rel[9];
	char ver[9];
	char mach[9];
};

asmlinkage int sunos_uname(struct sunos_utsname __user *name)
{
	int ret;
	down_read(&uts_sem);
	ret = copy_to_user(&name->sname[0], &utsname()->sysname[0],
			   sizeof(name->sname) - 1);
	if (!ret) {
		ret |= __copy_to_user(&name->nname[0], &utsname()->nodename[0],
				      sizeof(name->nname) - 1);
		ret |= __put_user('\0', &name->nname[8]);
		ret |= __copy_to_user(&name->rel[0], &utsname()->release[0],
				      sizeof(name->rel) - 1);
		ret |= __copy_to_user(&name->ver[0], &utsname()->version[0],
				      sizeof(name->ver) - 1);
		ret |= __copy_to_user(&name->mach[0], &utsname()->machine[0],
				      sizeof(name->mach) - 1);
	}
	up_read(&uts_sem);
	return ret ? -EFAULT : 0;
}

asmlinkage int sunos_nosys(void)
{
	struct pt_regs *regs;
	siginfo_t info;
	static int cnt;

	lock_kernel();
	regs = current->thread.kregs;
	info.si_signo = SIGSYS;
	info.si_errno = 0;
	info.si_code = __SI_FAULT|0x100;
	info.si_addr = (void __user *)regs->pc;
	info.si_trapno = regs->u_regs[UREG_G1];
	send_sig_info(SIGSYS, &info, current);
	if (cnt++ < 4) {
		printk("Process makes ni_syscall number %d, register dump:\n",
		       (int) regs->u_regs[UREG_G1]);
		show_regs(regs);
	}
	unlock_kernel();
	return -ENOSYS;
}

/* This is not a real and complete implementation yet, just to keep
 * the easy SunOS binaries happy.
 */
asmlinkage int sunos_fpathconf(int fd, int name)
{
	int ret;

	switch(name) {
	case _PCONF_LINK:
		ret = LINK_MAX;
		break;
	case _PCONF_CANON:
		ret = MAX_CANON;
		break;
	case _PCONF_INPUT:
		ret = MAX_INPUT;
		break;
	case _PCONF_NAME:
		ret = NAME_MAX;
		break;
	case _PCONF_PATH:
		ret = PATH_MAX;
		break;
	case _PCONF_PIPE:
		ret = PIPE_BUF;
		break;
	case _PCONF_CHRESTRICT:		/* XXX Investigate XXX */
		ret = 1;
		break;
	case _PCONF_NOTRUNC:		/* XXX Investigate XXX */
	case _PCONF_VDISABLE:
		ret = 0;
		break;
	default:
		ret = -EINVAL;
		break;
	}
	return ret;
}

asmlinkage int sunos_pathconf(char __user *path, int name)
{
	int ret;

	ret = sunos_fpathconf(0, name); /* XXX cheese XXX */
	return ret;
}

/* SunOS mount system call emulation */

asmlinkage int sunos_select(int width, fd_set __user *inp, fd_set __user *outp,
			    fd_set __user *exp, struct timeval __user *tvp)
{
	int ret;

	/* SunOS binaries expect that select won't change the tvp contents */
	ret = sys_select (width, inp, outp, exp, tvp);
	if (ret == -EINTR && tvp) {
		time_t sec, usec;

		__get_user(sec, &tvp->tv_sec);
		__get_user(usec, &tvp->tv_usec);

		if (sec == 0 && usec == 0)
			ret = 0;
	}
	return ret;
}

asmlinkage void sunos_nop(void)
{
	return;
}

/* SunOS mount/umount. */
#define SMNT_RDONLY       1
#define SMNT_NOSUID       2
#define SMNT_NEWTYPE      4
#define SMNT_GRPID        8
#define SMNT_REMOUNT      16
#define SMNT_NOSUB        32
#define SMNT_MULTI        64
#define SMNT_SYS5         128

struct sunos_fh_t {
	char fh_data [NFS_FHSIZE];
};

struct sunos_nfs_mount_args {
	struct sockaddr_in  __user *addr; /* file server address */
	struct nfs_fh __user *fh;     /* File handle to be mounted */
	int        flags;      /* flags */
	int        wsize;      /* write size in bytes */
	int        rsize;      /* read size in bytes */
	int        timeo;      /* initial timeout in .1 secs */
	int        retrans;    /* times to retry send */
	char       __user *hostname;  /* server's hostname */
	int        acregmin;   /* attr cache file min secs */
	int        acregmax;   /* attr cache file max secs */
	int        acdirmin;   /* attr cache dir min secs */
	int        acdirmax;   /* attr cache dir max secs */
	char       __user *netname;   /* server's netname */
};


/* Bind the socket on a local reserved port and connect it to the
 * remote server.  This on Linux/i386 is done by the mount program,
 * not by the kernel.
 */
static int
sunos_nfs_get_server_fd (int fd, struct sockaddr_in *addr)
{
	struct sockaddr_in local;
	struct sockaddr_in server;
	int    try_port;
	struct socket *socket;
	struct inode  *inode;
	struct file   *file;
	int    ret, result = 0;

	file = fget(fd);
	if (!file)
		goto out;

	inode = file->f_path.dentry->d_inode;

	socket = SOCKET_I(inode);
	local.sin_family = AF_INET;
	local.sin_addr.s_addr = INADDR_ANY;

	/* IPPORT_RESERVED = 1024, can't find the definition in the kernel */
	try_port = 1024;
	do {
		local.sin_port = htons (--try_port);
		ret = socket->ops->bind(socket, (struct sockaddr*)&local,
					sizeof(local));
	} while (ret && try_port > (1024 / 2));

	if (ret)
		goto out_putf;

	server.sin_family = AF_INET;
	server.sin_addr = addr->sin_addr;
	server.sin_port = NFS_PORT;

	/* Call sys_connect */
	ret = socket->ops->connect (socket, (struct sockaddr *) &server,
				    sizeof (server), file->f_flags);
	if (ret >= 0)
		result = 1;

out_putf:
	fput(file);
out:
	return result;
}

static int get_default (int value, int def_value)
{
    if (value)
	return value;
    else
	return def_value;
}

static int sunos_nfs_mount(char *dir_name, int linux_flags, void __user *data)
{
	int  server_fd, err;
	char *the_name, *mount_page;
	struct nfs_mount_data linux_nfs_mount;
	struct sunos_nfs_mount_args sunos_mount;

	/* Ok, here comes the fun part: Linux's nfs mount needs a
	 * socket connection to the server, but SunOS mount does not
	 * require this, so we use the information on the destination
	 * address to create a socket and bind it to a reserved
	 * port on this system
	 */
	if (copy_from_user(&sunos_mount, data, sizeof(sunos_mount)))
		return -EFAULT;

	server_fd = sys_socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP);
	if (server_fd < 0)
		return -ENXIO;

	if (copy_from_user(&linux_nfs_mount.addr,sunos_mount.addr,
				sizeof(*sunos_mount.addr)) ||
	    copy_from_user(&linux_nfs_mount.root,sunos_mount.fh,
				sizeof(*sunos_mount.fh))) {
		sys_close (server_fd);
		return -EFAULT;
	}

	if (!sunos_nfs_get_server_fd (server_fd, &linux_nfs_mount.addr)){
		sys_close (server_fd);
		return -ENXIO;
	}

	/* Now, bind it to a locally reserved port */
	linux_nfs_mount.version  = NFS_MOUNT_VERSION;
	linux_nfs_mount.flags    = sunos_mount.flags;
	linux_nfs_mount.fd       = server_fd;
	
	linux_nfs_mount.rsize    = get_default (sunos_mount.rsize, 8192);
	linux_nfs_mount.wsize    = get_default (sunos_mount.wsize, 8192);
	linux_nfs_mount.timeo    = get_default (sunos_mount.timeo, 10);
	linux_nfs_mount.retrans  = sunos_mount.retrans;
	
	linux_nfs_mount.acregmin = sunos_mount.acregmin;
	linux_nfs_mount.acregmax = sunos_mount.acregmax;
	linux_nfs_mount.acdirmin = sunos_mount.acdirmin;
	linux_nfs_mount.acdirmax = sunos_mount.acdirmax;

	the_name = getname(sunos_mount.hostname);
	if (IS_ERR(the_name))
		return PTR_ERR(the_name);

	strlcpy(linux_nfs_mount.hostname, the_name,
		sizeof(linux_nfs_mount.hostname));
	putname (the_name);
	
	mount_page = (char *) get_zeroed_page(GFP_KERNEL);
	if (!mount_page)
		return -ENOMEM;

	memcpy(mount_page, &linux_nfs_mount, sizeof(linux_nfs_mount));

	err = do_mount("", dir_name, "nfs", linux_flags, mount_page);

	free_page((unsigned long) mount_page);
	return err;
}

asmlinkage int
sunos_mount(char __user *type, char __user *dir, int flags, void __user *data)
{
	int linux_flags = 0;
	int ret = -EINVAL;
	char *dev_fname = NULL;
	char *dir_page, *type_page;

	if (!capable (CAP_SYS_ADMIN))
		return -EPERM;
		
	lock_kernel();
	/* We don't handle the integer fs type */
	if ((flags & SMNT_NEWTYPE) == 0)
		goto out;

	/* Do not allow for those flags we don't support */
	if (flags & (SMNT_GRPID|SMNT_NOSUB|SMNT_MULTI|SMNT_SYS5))
		goto out;

	if (flags & SMNT_REMOUNT)
		linux_flags |= MS_REMOUNT;
	if (flags & SMNT_RDONLY)
		linux_flags |= MS_RDONLY;
	if (flags & SMNT_NOSUID)
		linux_flags |= MS_NOSUID;

	dir_page = getname(dir);
	ret = PTR_ERR(dir_page);
	if (IS_ERR(dir_page))
		goto out;

	type_page = getname(type);
	ret = PTR_ERR(type_page);
	if (IS_ERR(type_page))
		goto out1;

	if (strcmp(type_page, "ext2") == 0) {
		dev_fname = getname(data);
	} else if (strcmp(type_page, "iso9660") == 0) {
		dev_fname = getname(data);
	} else if (strcmp(type_page, "minix") == 0) {
		dev_fname = getname(data);
	} else if (strcmp(type_page, "nfs") == 0) {
		ret = sunos_nfs_mount (dir_page, flags, data);
		goto out2;
        } else if (strcmp(type_page, "ufs") == 0) {
		printk("Warning: UFS filesystem mounts unsupported.\n");
		ret = -ENODEV;
		goto out2;
	} else if (strcmp(type_page, "proc")) {
		ret = -ENODEV;
		goto out2;
	}
	ret = PTR_ERR(dev_fname);
	if (IS_ERR(dev_fname))
		goto out2;
	ret = do_mount(dev_fname, dir_page, type_page, linux_flags, NULL);
	if (dev_fname)
		putname(dev_fname);
out2:
	putname(type_page);
out1:
	putname(dir_page);
out:
	unlock_kernel();
	return ret;
}


asmlinkage int sunos_setpgrp(pid_t pid, pid_t pgid)
{
	int ret;

	/* So stupid... */
	if ((!pid || pid == current->pid) &&
	    !pgid) {
		sys_setsid();
		ret = 0;
	} else {
		ret = sys_setpgid(pid, pgid);
	}
	return ret;
}

/* So stupid... */
asmlinkage int sunos_wait4(pid_t pid, unsigned int __user *stat_addr,
			   int options, struct rusage __user*ru)
{
	int ret;

	ret = sys_wait4((pid ? pid : -1), stat_addr, options, ru);
	return ret;
}

asmlinkage int sunos_killpg(int pgrp, int sig)
{
	int ret;

	rcu_read_lock();
	ret = -EINVAL;
	if (pgrp > 0)
		ret = kill_pgrp(find_pid(pgrp), sig, 0);
	rcu_read_unlock();

	return ret;
}

asmlinkage int sunos_audit(void)
{
	lock_kernel();
	printk ("sys_audit\n");
	unlock_kernel();
	return -1;
}

asmlinkage unsigned long sunos_gethostid(void)
{
	unsigned long ret;

	lock_kernel();
	ret = ((unsigned long)idprom->id_machtype << 24) |
		(unsigned long)idprom->id_sernum;
	unlock_kernel();
	return ret;
}

/* sysconf options, for SunOS compatibility */
#define   _SC_ARG_MAX             1
#define   _SC_CHILD_MAX           2
#define   _SC_CLK_TCK             3
#define   _SC_NGROUPS_MAX         4
#define   _SC_OPEN_MAX            5
#define   _SC_JOB_CONTROL         6
#define   _SC_SAVED_IDS           7
#define   _SC_VERSION             8

asmlinkage long sunos_sysconf (int name)
{
	long ret;

	switch (name){
	case _SC_ARG_MAX:
		ret = ARG_MAX;
		break;
	case _SC_CHILD_MAX:
		ret = current->signal->rlim[RLIMIT_NPROC].rlim_cur;
		break;
	case _SC_CLK_TCK:
		ret = HZ;
		break;
	case _SC_NGROUPS_MAX:
		ret = NGROUPS_MAX;
		break;
	case _SC_OPEN_MAX:
		ret = current->signal->rlim[RLIMIT_NOFILE].rlim_cur;
		break;
	case _SC_JOB_CONTROL:
		ret = 1;	/* yes, we do support job control */
		break;
	case _SC_SAVED_IDS:
		ret = 1;	/* yes, we do support saved uids  */
		break;
	case _SC_VERSION:
		/* mhm, POSIX_VERSION is in /usr/include/unistd.h
		 * should it go on /usr/include/linux?
		 */
		ret = 199009L; 
		break;
	default:
		ret = -1;
		break;
	};
	return ret;
}

asmlinkage int sunos_semsys(int op, unsigned long arg1, unsigned long arg2,
			    unsigned long arg3, void *ptr)
{
	union semun arg4;
	int ret;

	switch (op) {
	case 0:
		/* Most arguments match on a 1:1 basis but cmd doesn't */
		switch(arg3) {
		case 4:
			arg3=GETPID; break;
		case 5:
			arg3=GETVAL; break;
		case 6:
			arg3=GETALL; break;
		case 3:
			arg3=GETNCNT; break;
		case 7:
			arg3=GETZCNT; break;
		case 8:
			arg3=SETVAL; break;
		case 9:
			arg3=SETALL; break;
		}
		/* sys_semctl(): */
		/* value to modify semaphore to */
		arg4.__pad = (void __user *) ptr;
		ret = sys_semctl((int)arg1, (int)arg2, (int)arg3, arg4 );
		break;
	case 1:
		/* sys_semget(): */
		ret = sys_semget((key_t)arg1, (int)arg2, (int)arg3);
		break;
	case 2:
		/* sys_semop(): */
		ret = sys_semop((int)arg1, (struct sembuf __user *)arg2, (unsigned)arg3);
		break;
	default:
		ret = -EINVAL;
		break;
	};
	return ret;
}

asmlinkage int sunos_msgsys(int op, unsigned long arg1, unsigned long arg2,
			    unsigned long arg3, unsigned long arg4)
{
	struct sparc_stackf *sp;
	unsigned long arg5;
	int rval;

	switch(op) {
	case 0:
		rval = sys_msgget((key_t)arg1, (int)arg2);
		break;
	case 1:
		rval = sys_msgctl((int)arg1, (int)arg2,
				  (struct msqid_ds __user *)arg3);
		break;
	case 2:
		lock_kernel();
		sp = (struct sparc_stackf *)current->thread.kregs->u_regs[UREG_FP];
		arg5 = sp->xxargs[0];
		unlock_kernel();
		rval = sys_msgrcv((int)arg1, (struct msgbuf __user *)arg2,
				  (size_t)arg3, (long)arg4, (int)arg5);
		break;
	case 3:
		rval = sys_msgsnd((int)arg1, (struct msgbuf __user *)arg2,
				  (size_t)arg3, (int)arg4);
		break;
	default:
		rval = -EINVAL;
		break;
	}
	return rval;
}

asmlinkage int sunos_shmsys(int op, unsigned long arg1, unsigned long arg2,
			    unsigned long arg3)
{
	unsigned long raddr;
	int rval;

	switch(op) {
	case 0:
		/* do_shmat(): attach a shared memory area */
		rval = do_shmat((int)arg1,(char __user *)arg2,(int)arg3,&raddr);
		if (!rval)
			rval = (int) raddr;
		break;
	case 1:
		/* sys_shmctl(): modify shared memory area attr. */
		rval = sys_shmctl((int)arg1,(int)arg2,(struct shmid_ds __user *)arg3);
		break;
	case 2:
		/* sys_shmdt(): detach a shared memory area */
		rval = sys_shmdt((char __user *)arg1);
		break;
	case 3:
		/* sys_shmget(): get a shared memory area */
		rval = sys_shmget((key_t)arg1,(int)arg2,(int)arg3);
		break;
	default:
		rval = -EINVAL;
		break;
	};
	return rval;
}

#define SUNOS_EWOULDBLOCK 35

/* see the sunos man page read(2v) for an explanation
   of this garbage. We use O_NDELAY to mark
   file descriptors that have been set non-blocking 
   using 4.2BSD style calls. (tridge) */

static inline int check_nonblock(int ret, int fd)
{
	if (ret == -EAGAIN) {
		struct file * file = fget(fd);
		if (file) {
			if (file->f_flags & O_NDELAY)
				ret = -SUNOS_EWOULDBLOCK;
			fput(file);
		}
	}
	return ret;
}

asmlinkage int sunos_read(unsigned int fd, char __user *buf, int count)
{
	int ret;

	ret = check_nonblock(sys_read(fd,buf,count),fd);
	return ret;
}

asmlinkage int sunos_readv(unsigned long fd, const struct iovec __user *vector,
			   long count)
{
	int ret;

	ret = check_nonblock(sys_readv(fd,vector,count),fd);
	return ret;
}

asmlinkage int sunos_write(unsigned int fd, char __user *buf, int count)
{
	int ret;

	ret = check_nonblock(sys_write(fd,buf,count),fd);
	return ret;
}

asmlinkage int sunos_writev(unsigned long fd,
			    const struct iovec __user *vector, long count)
{
	int ret;

	ret = check_nonblock(sys_writev(fd,vector,count),fd);
	return ret;
}

asmlinkage int sunos_recv(int fd, void __user *ubuf, int size, unsigned flags)
{
	int ret;

	ret = check_nonblock(sys_recv(fd,ubuf,size,flags),fd);
	return ret;
}

asmlinkage int sunos_send(int fd, void __user *buff, int len, unsigned flags)
{
	int ret;

	ret = check_nonblock(sys_send(fd,buff,len,flags),fd);
	return ret;
}

asmlinkage int sunos_accept(int fd, struct sockaddr __user *sa,
			    int __user *addrlen)
{
	int ret;

	while (1) {
		ret = check_nonblock(sys_accept(fd,sa,addrlen),fd);	
		if (ret != -ENETUNREACH && ret != -EHOSTUNREACH)
			break;
	}

	return ret;
}

#define SUNOS_SV_INTERRUPT 2

asmlinkage int
sunos_sigaction(int sig, const struct old_sigaction __user *act,
		struct old_sigaction __user *oact)
{
	struct k_sigaction new_ka, old_ka;
	int ret;

	if (act) {
		old_sigset_t mask;

		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
		    __get_user(new_ka.sa.sa_flags, &act->sa_flags))
			return -EFAULT;
		__get_user(mask, &act->sa_mask);
		new_ka.sa.sa_restorer = NULL;
		new_ka.ka_restorer = NULL;
		siginitset(&new_ka.sa.sa_mask, mask);
		new_ka.sa.sa_flags ^= SUNOS_SV_INTERRUPT;
	}

	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);

	if (!ret && oact) {
		/* In the clone() case we could copy half consistent
		 * state to the user, however this could sleep and
		 * deadlock us if we held the signal lock on SMP.  So for
		 * now I take the easy way out and do no locking.
		 * But then again we don't support SunOS lwp's anyways ;-)
		 */
		old_ka.sa.sa_flags ^= SUNOS_SV_INTERRUPT;
		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags))
			 return -EFAULT;
		__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
	}

	return ret;
}


asmlinkage int sunos_setsockopt(int fd, int level, int optname,
				char __user *optval, int optlen)
{
	int tr_opt = optname;
	int ret;

	if (level == SOL_IP) {
		/* Multicast socketopts (ttl, membership) */
		if (tr_opt >=2 && tr_opt <= 6)
			tr_opt += 30;
	}
	ret = sys_setsockopt(fd, level, tr_opt, optval, optlen);
	return ret;
}

asmlinkage int sunos_getsockopt(int fd, int level, int optname,
				char __user *optval, int __user *optlen)
{
	int tr_opt = optname;
	int ret;

	if (level == SOL_IP) {
		/* Multicast socketopts (ttl, membership) */
		if (tr_opt >=2 && tr_opt <= 6)
			tr_opt += 30;
	}
	ret = sys_getsockopt(fd, level, tr_opt, optval, optlen);
	return ret;
}