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Linux 2.6.25-rc4
[linux-2.6/next.git] / arch / sparc / kernel / sys_sunos.c
blob28c187c5d9fd68dc4eea2008fa253d63d8e0b9d8
1 /* $Id: sys_sunos.c,v 1.137 2002/02/08 03:57:14 davem Exp $
2 * sys_sunos.c: SunOS specific syscall compatibility support.
3 *
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx)
6 *
7 * Based upon preliminary work which is:
8 *
9 * Copyright (C) 1995 Adrian M. Rodriguez (adrian@remus.rutgers.edu)
10 *
11 */
12
13 #include <linux/kernel.h>
14 #include <linux/sched.h>
15 #include <linux/types.h>
16 #include <linux/mman.h>
17 #include <linux/mm.h>
18 #include <linux/swap.h>
19 #include <linux/fs.h>
20 #include <linux/file.h>
21 #include <linux/resource.h>
22 #include <linux/ipc.h>
23 #include <linux/shm.h>
24 #include <linux/msg.h>
25 #include <linux/sem.h>
26 #include <linux/signal.h>
27 #include <linux/uio.h>
28 #include <linux/utsname.h>
29 #include <linux/major.h>
30 #include <linux/stat.h>
31 #include <linux/slab.h>
32 #include <linux/pagemap.h>
33 #include <linux/capability.h>
34 #include <linux/errno.h>
35 #include <linux/smp.h>
36 #include <linux/smp_lock.h>
37 #include <linux/syscalls.h>
38
39 #include <net/sock.h>
40
41 #include <asm/uaccess.h>
42 #ifndef KERNEL_DS
43 #include <linux/segment.h>
44 #endif
45
46 #include <asm/page.h>
47 #include <asm/pgtable.h>
48 #include <asm/pconf.h>
49 #include <asm/idprom.h> /* for gethostid() */
50 #include <asm/unistd.h>
51 #include <asm/system.h>
52
53 /* For the nfs mount emulation */
54 #include <linux/socket.h>
55 #include <linux/in.h>
56 #include <linux/nfs.h>
57 #include <linux/nfs2.h>
58 #include <linux/nfs_mount.h>
59
60 /* for sunos_select */
61 #include <linux/time.h>
62 #include <linux/personality.h>
63
64 /* NR_OPEN is now larger and dynamic in recent kernels. */
65 #define SUNOS_NR_OPEN 256
66
67 /* We use the SunOS mmap() semantics. */
68 asmlinkage unsigned long sunos_mmap(unsigned long addr, unsigned long len,
69 unsigned long prot, unsigned long flags,
70 unsigned long fd, unsigned long off)
71 {
72 struct file * file = NULL;
73 unsigned long retval, ret_type;
74
75 if (flags & MAP_NORESERVE) {
76 static int cnt;
77 if (cnt++ < 10)
78 printk("%s: unimplemented SunOS MAP_NORESERVE mmap() flag\n",
79 current->comm);
80 flags &= ~MAP_NORESERVE;
81 }
82 retval = -EBADF;
83 if (!(flags & MAP_ANONYMOUS)) {
84 if (fd >= SUNOS_NR_OPEN)
85 goto out;
86 file = fget(fd);
87 if (!file)
88 goto out;
89 }
90
91 retval = -EINVAL;
92 /* If this is ld.so or a shared library doing an mmap
93 * of /dev/zero, transform it into an anonymous mapping.
94 * SunOS is so stupid some times... hmph!
95 */
96 if (file) {
97 if (imajor(file->f_path.dentry->d_inode) == MEM_MAJOR &&
98 iminor(file->f_path.dentry->d_inode) == 5) {
99 flags |= MAP_ANONYMOUS;
100 fput(file);
101 file = NULL;
102 }
103 }
104 ret_type = flags & _MAP_NEW;
105 flags &= ~_MAP_NEW;
106
107 if (!(flags & MAP_FIXED))
108 addr = 0;
109 else {
110 if (ARCH_SUN4C_SUN4 &&
111 (len > 0x20000000 ||
112 ((flags & MAP_FIXED) &&
113 addr < 0xe0000000 && addr + len > 0x20000000)))
114 goto out_putf;
115
116 /* See asm-sparc/uaccess.h */
117 if (len > TASK_SIZE - PAGE_SIZE ||
118 addr + len > TASK_SIZE - PAGE_SIZE)
119 goto out_putf;
120 }
121
122 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
123 down_write(&current->mm->mmap_sem);
124 retval = do_mmap(file, addr, len, prot, flags, off);
125 up_write(&current->mm->mmap_sem);
126 if (!ret_type)
127 retval = ((retval < PAGE_OFFSET) ? 0 : retval);
128
129 out_putf:
130 if (file)
131 fput(file);
132 out:
133 return retval;
134 }
135
136 /* lmbench calls this, just say "yeah, ok" */
137 asmlinkage int sunos_mctl(unsigned long addr, unsigned long len, int function, char *arg)
138 {
139 return 0;
140 }
141
142 /* SunOS is completely broken... it returns 0 on success, otherwise
143 * ENOMEM. For sys_sbrk() it wants the old brk value as a return
144 * on success and ENOMEM as before on failure.
145 */
146 asmlinkage int sunos_brk(unsigned long brk)
147 {
148 int freepages, retval = -ENOMEM;
149 unsigned long rlim;
150 unsigned long newbrk, oldbrk;
151
152 down_write(&current->mm->mmap_sem);
153 if (ARCH_SUN4C_SUN4) {
154 if (brk >= 0x20000000 && brk < 0xe0000000) {
155 goto out;
156 }
157 }
158
159 if (brk < current->mm->end_code)
160 goto out;
161
162 newbrk = PAGE_ALIGN(brk);
163 oldbrk = PAGE_ALIGN(current->mm->brk);
164 retval = 0;
165 if (oldbrk == newbrk) {
166 current->mm->brk = brk;
167 goto out;
168 }
169
170 /*
171 * Always allow shrinking brk
172 */
173 if (brk <= current->mm->brk) {
174 current->mm->brk = brk;
175 do_munmap(current->mm, newbrk, oldbrk-newbrk);
176 goto out;
177 }
178 /*
179 * Check against rlimit and stack..
180 */
181 retval = -ENOMEM;
182 rlim = current->signal->rlim[RLIMIT_DATA].rlim_cur;
183 if (rlim >= RLIM_INFINITY)
184 rlim = ~0;
185 if (brk - current->mm->end_code > rlim)
186 goto out;
187
188 /*
189 * Check against existing mmap mappings.
190 */
191 if (find_vma_intersection(current->mm, oldbrk, newbrk+PAGE_SIZE))
192 goto out;
193
194 /*
195 * stupid algorithm to decide if we have enough memory: while
196 * simple, it hopefully works in most obvious cases.. Easy to
197 * fool it, but this should catch most mistakes.
198 */
199 freepages = global_page_state(NR_FILE_PAGES);
200 freepages >>= 1;
201 freepages += nr_free_pages();
202 freepages += nr_swap_pages;
203 freepages -= num_physpages >> 4;
204 freepages -= (newbrk-oldbrk) >> PAGE_SHIFT;
205 if (freepages < 0)
206 goto out;
207 /*
208 * Ok, we have probably got enough memory - let it rip.
209 */
210 current->mm->brk = brk;
211 do_brk(oldbrk, newbrk-oldbrk);
212 retval = 0;
213 out:
214 up_write(&current->mm->mmap_sem);
215 return retval;
216 }
217
218 asmlinkage unsigned long sunos_sbrk(int increment)
219 {
220 int error;
221 unsigned long oldbrk;
222
223 /* This should do it hopefully... */
224 lock_kernel();
225 oldbrk = current->mm->brk;
226 error = sunos_brk(((int) current->mm->brk) + increment);
227 if (!error)
228 error = oldbrk;
229 unlock_kernel();
230 return error;
231 }
232
233 /* XXX Completely undocumented, and completely magic...
234 * XXX I believe it is to increase the size of the stack by
235 * XXX argument 'increment' and return the new end of stack
236 * XXX area. Wheee...
237 */
238 asmlinkage unsigned long sunos_sstk(int increment)
239 {
240 lock_kernel();
241 printk("%s: Call to sunos_sstk(increment<%d>) is unsupported\n",
242 current->comm, increment);
243 unlock_kernel();
244 return -1;
245 }
246
247 /* Give hints to the kernel as to what paging strategy to use...
248 * Completely bogus, don't remind me.
249 */
250 #define VA_NORMAL 0 /* Normal vm usage expected */
251 #define VA_ABNORMAL 1 /* Abnormal/random vm usage probable */
252 #define VA_SEQUENTIAL 2 /* Accesses will be of a sequential nature */
253 #define VA_INVALIDATE 3 /* Page table entries should be flushed ??? */
254 static char *vstrings[] = {
255 "VA_NORMAL",
256 "VA_ABNORMAL",
257 "VA_SEQUENTIAL",
258 "VA_INVALIDATE",
259 };
260
261 asmlinkage void sunos_vadvise(unsigned long strategy)
262 {
263 /* I wanna see who uses this... */
264 lock_kernel();
265 printk("%s: Advises us to use %s paging strategy\n",
266 current->comm,
267 strategy <= 3 ? vstrings[strategy] : "BOGUS");
268 unlock_kernel();
269 }
270
271 /* This just wants the soft limit (ie. rlim_cur element) of the RLIMIT_NOFILE
272 * resource limit and is for backwards compatibility with older sunos
273 * revs.
274 */
275 asmlinkage long sunos_getdtablesize(void)
276 {
277 return SUNOS_NR_OPEN;
278 }
279
280 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
281
282 asmlinkage unsigned long sunos_sigblock(unsigned long blk_mask)
283 {
284 unsigned long old;
285
286 spin_lock_irq(&current->sighand->siglock);
287 old = current->blocked.sig[0];
288 current->blocked.sig[0] |= (blk_mask & _BLOCKABLE);
289 recalc_sigpending();
290 spin_unlock_irq(&current->sighand->siglock);
291 return old;
292 }
293
294 asmlinkage unsigned long sunos_sigsetmask(unsigned long newmask)
295 {
296 unsigned long retval;
297
298 spin_lock_irq(&current->sighand->siglock);
299 retval = current->blocked.sig[0];
300 current->blocked.sig[0] = (newmask & _BLOCKABLE);
301 recalc_sigpending();
302 spin_unlock_irq(&current->sighand->siglock);
303 return retval;
304 }
305
306 /* SunOS getdents is very similar to the newer Linux (iBCS2 compliant) */
307 /* getdents system call, the format of the structure just has a different */
308 /* layout (d_off+d_ino instead of d_ino+d_off) */
309 struct sunos_dirent {
310 long d_off;
311 unsigned long d_ino;
312 unsigned short d_reclen;
313 unsigned short d_namlen;
314 char d_name[1];
315 };
316
317 struct sunos_dirent_callback {
318 struct sunos_dirent __user *curr;
319 struct sunos_dirent __user *previous;
320 int count;
321 int error;
322 };
323
324 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
325 #define ROUND_UP(x) (((x)+sizeof(long)-1) & ~(sizeof(long)-1))
326
327 static int sunos_filldir(void * __buf, const char * name, int namlen,
328 loff_t offset, u64 ino, unsigned int d_type)
329 {
330 struct sunos_dirent __user *dirent;
331 struct sunos_dirent_callback * buf = __buf;
332 unsigned long d_ino;
333 int reclen = ROUND_UP(NAME_OFFSET(dirent) + namlen + 1);
334
335 buf->error = -EINVAL; /* only used if we fail.. */
336 if (reclen > buf->count)
337 return -EINVAL;
338 d_ino = ino;
339 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
340 return -EOVERFLOW;
341 dirent = buf->previous;
342 if (dirent)
343 put_user(offset, &dirent->d_off);
344 dirent = buf->curr;
345 buf->previous = dirent;
346 put_user(d_ino, &dirent->d_ino);
347 put_user(namlen, &dirent->d_namlen);
348 put_user(reclen, &dirent->d_reclen);
349 copy_to_user(dirent->d_name, name, namlen);
350 put_user(0, dirent->d_name + namlen);
351 dirent = (void __user *) dirent + reclen;
352 buf->curr = dirent;
353 buf->count -= reclen;
354 return 0;
355 }
356
357 asmlinkage int sunos_getdents(unsigned int fd, void __user *dirent, int cnt)
358 {
359 struct file * file;
360 struct sunos_dirent __user *lastdirent;
361 struct sunos_dirent_callback buf;
362 int error = -EBADF;
363
364 if (fd >= SUNOS_NR_OPEN)
365 goto out;
366
367 file = fget(fd);
368 if (!file)
369 goto out;
370
371 error = -EINVAL;
372 if (cnt < (sizeof(struct sunos_dirent) + 255))
373 goto out_putf;
374
375 buf.curr = (struct sunos_dirent __user *) dirent;
376 buf.previous = NULL;
377 buf.count = cnt;
378 buf.error = 0;
379
380 error = vfs_readdir(file, sunos_filldir, &buf);
381 if (error < 0)
382 goto out_putf;
383
384 lastdirent = buf.previous;
385 error = buf.error;
386 if (lastdirent) {
387 put_user(file->f_pos, &lastdirent->d_off);
388 error = cnt - buf.count;
389 }
390
391 out_putf:
392 fput(file);
393 out:
394 return error;
395 }
396
397 /* Old sunos getdirentries, severely broken compatibility stuff here. */
398 struct sunos_direntry {
399 unsigned long d_ino;
400 unsigned short d_reclen;
401 unsigned short d_namlen;
402 char d_name[1];
403 };
404
405 struct sunos_direntry_callback {
406 struct sunos_direntry __user *curr;
407 struct sunos_direntry __user *previous;
408 int count;
409 int error;
410 };
411
412 static int sunos_filldirentry(void * __buf, const char * name, int namlen,
413 loff_t offset, u64 ino, unsigned int d_type)
414 {
415 struct sunos_direntry __user *dirent;
416 struct sunos_direntry_callback *buf = __buf;
417 unsigned long d_ino;
418 int reclen = ROUND_UP(NAME_OFFSET(dirent) + namlen + 1);
419
420 buf->error = -EINVAL; /* only used if we fail.. */
421 if (reclen > buf->count)
422 return -EINVAL;
423 d_ino = ino;
424 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
425 return -EOVERFLOW;
426 dirent = buf->previous;
427 dirent = buf->curr;
428 buf->previous = dirent;
429 put_user(d_ino, &dirent->d_ino);
430 put_user(namlen, &dirent->d_namlen);
431 put_user(reclen, &dirent->d_reclen);
432 copy_to_user(dirent->d_name, name, namlen);
433 put_user(0, dirent->d_name + namlen);
434 dirent = (void __user *) dirent + reclen;
435 buf->curr = dirent;
436 buf->count -= reclen;
437 return 0;
438 }
439
440 asmlinkage int sunos_getdirentries(unsigned int fd, void __user *dirent,
441 int cnt, unsigned int __user *basep)
442 {
443 struct file * file;
444 struct sunos_direntry __user *lastdirent;
445 struct sunos_direntry_callback buf;
446 int error = -EBADF;
447
448 if (fd >= SUNOS_NR_OPEN)
449 goto out;
450
451 file = fget(fd);
452 if (!file)
453 goto out;
454
455 error = -EINVAL;
456 if (cnt < (sizeof(struct sunos_direntry) + 255))
457 goto out_putf;
458
459 buf.curr = (struct sunos_direntry __user *) dirent;
460 buf.previous = NULL;
461 buf.count = cnt;
462 buf.error = 0;
463
464 error = vfs_readdir(file, sunos_filldirentry, &buf);
465 if (error < 0)
466 goto out_putf;
467
468 lastdirent = buf.previous;
469 error = buf.error;
470 if (lastdirent) {
471 put_user(file->f_pos, basep);
472 error = cnt - buf.count;
473 }
474
475 out_putf:
476 fput(file);
477 out:
478 return error;
479 }
480
481 struct sunos_utsname {
482 char sname[9];
483 char nname[9];
484 char nnext[56];
485 char rel[9];
486 char ver[9];
487 char mach[9];
488 };
489
490 asmlinkage int sunos_uname(struct sunos_utsname __user *name)
491 {
492 int ret;
493 down_read(&uts_sem);
494 ret = copy_to_user(&name->sname[0], &utsname()->sysname[0],
495 sizeof(name->sname) - 1);
496 if (!ret) {
497 ret |= __copy_to_user(&name->nname[0], &utsname()->nodename[0],
498 sizeof(name->nname) - 1);
499 ret |= __put_user('\0', &name->nname[8]);
500 ret |= __copy_to_user(&name->rel[0], &utsname()->release[0],
501 sizeof(name->rel) - 1);
502 ret |= __copy_to_user(&name->ver[0], &utsname()->version[0],
503 sizeof(name->ver) - 1);
504 ret |= __copy_to_user(&name->mach[0], &utsname()->machine[0],
505 sizeof(name->mach) - 1);
506 }
507 up_read(&uts_sem);
508 return ret ? -EFAULT : 0;
509 }
510
511 asmlinkage int sunos_nosys(void)
512 {
513 struct pt_regs *regs;
514 siginfo_t info;
515 static int cnt;
516
517 lock_kernel();
518 regs = current->thread.kregs;
519 info.si_signo = SIGSYS;
520 info.si_errno = 0;
521 info.si_code = __SI_FAULT|0x100;
522 info.si_addr = (void __user *)regs->pc;
523 info.si_trapno = regs->u_regs[UREG_G1];
524 send_sig_info(SIGSYS, &info, current);
525 if (cnt++ < 4) {
526 printk("Process makes ni_syscall number %d, register dump:\n",
527 (int) regs->u_regs[UREG_G1]);
528 show_regs(regs);
529 }
530 unlock_kernel();
531 return -ENOSYS;
532 }
533
534 /* This is not a real and complete implementation yet, just to keep
535 * the easy SunOS binaries happy.
536 */
537 asmlinkage int sunos_fpathconf(int fd, int name)
538 {
539 int ret;
540
541 switch(name) {
542 case _PCONF_LINK:
543 ret = LINK_MAX;
544 break;
545 case _PCONF_CANON:
546 ret = MAX_CANON;
547 break;
548 case _PCONF_INPUT:
549 ret = MAX_INPUT;
550 break;
551 case _PCONF_NAME:
552 ret = NAME_MAX;
553 break;
554 case _PCONF_PATH:
555 ret = PATH_MAX;
556 break;
557 case _PCONF_PIPE:
558 ret = PIPE_BUF;
559 break;
560 case _PCONF_CHRESTRICT: /* XXX Investigate XXX */
561 ret = 1;
562 break;
563 case _PCONF_NOTRUNC: /* XXX Investigate XXX */
564 case _PCONF_VDISABLE:
565 ret = 0;
566 break;
567 default:
568 ret = -EINVAL;
569 break;
570 }
571 return ret;
572 }
573
574 asmlinkage int sunos_pathconf(char __user *path, int name)
575 {
576 int ret;
577
578 ret = sunos_fpathconf(0, name); /* XXX cheese XXX */
579 return ret;
580 }
581
582 /* SunOS mount system call emulation */
583
584 asmlinkage int sunos_select(int width, fd_set __user *inp, fd_set __user *outp,
585 fd_set __user *exp, struct timeval __user *tvp)
586 {
587 int ret;
588
589 /* SunOS binaries expect that select won't change the tvp contents */
590 ret = sys_select (width, inp, outp, exp, tvp);
591 if (ret == -EINTR && tvp) {
592 time_t sec, usec;
593
594 __get_user(sec, &tvp->tv_sec);
595 __get_user(usec, &tvp->tv_usec);
596
597 if (sec == 0 && usec == 0)
598 ret = 0;
599 }
600 return ret;
601 }
602
603 asmlinkage void sunos_nop(void)
604 {
605 return;
606 }
607
608 /* SunOS mount/umount. */
609 #define SMNT_RDONLY 1
610 #define SMNT_NOSUID 2
611 #define SMNT_NEWTYPE 4
612 #define SMNT_GRPID 8
613 #define SMNT_REMOUNT 16
614 #define SMNT_NOSUB 32
615 #define SMNT_MULTI 64
616 #define SMNT_SYS5 128
617
618 struct sunos_fh_t {
619 char fh_data [NFS_FHSIZE];
620 };
621
622 struct sunos_nfs_mount_args {
623 struct sockaddr_in __user *addr; /* file server address */
624 struct nfs_fh __user *fh; /* File handle to be mounted */
625 int flags; /* flags */
626 int wsize; /* write size in bytes */
627 int rsize; /* read size in bytes */
628 int timeo; /* initial timeout in .1 secs */
629 int retrans; /* times to retry send */
630 char __user *hostname; /* server's hostname */
631 int acregmin; /* attr cache file min secs */
632 int acregmax; /* attr cache file max secs */
633 int acdirmin; /* attr cache dir min secs */
634 int acdirmax; /* attr cache dir max secs */
635 char __user *netname; /* server's netname */
636 };
637
638
639 /* Bind the socket on a local reserved port and connect it to the
640 * remote server. This on Linux/i386 is done by the mount program,
641 * not by the kernel.
642 */
643 static int
644 sunos_nfs_get_server_fd (int fd, struct sockaddr_in *addr)
645 {
646 struct sockaddr_in local;
647 struct sockaddr_in server;
648 int try_port;
649 struct socket *socket;
650 struct inode *inode;
651 struct file *file;
652 int ret, result = 0;
653
654 file = fget(fd);
655 if (!file)
656 goto out;
657
658 inode = file->f_path.dentry->d_inode;
659
660 socket = SOCKET_I(inode);
661 local.sin_family = AF_INET;
662 local.sin_addr.s_addr = INADDR_ANY;
663
664 /* IPPORT_RESERVED = 1024, can't find the definition in the kernel */
665 try_port = 1024;
666 do {
667 local.sin_port = htons (--try_port);
668 ret = socket->ops->bind(socket, (struct sockaddr*)&local,
669 sizeof(local));
670 } while (ret && try_port > (1024 / 2));
671
672 if (ret)
673 goto out_putf;
674
675 server.sin_family = AF_INET;
676 server.sin_addr = addr->sin_addr;
677 server.sin_port = NFS_PORT;
678
679 /* Call sys_connect */
680 ret = socket->ops->connect (socket, (struct sockaddr *) &server,
681 sizeof (server), file->f_flags);
682 if (ret >= 0)
683 result = 1;
684
685 out_putf:
686 fput(file);
687 out:
688 return result;
689 }
690
691 static int get_default (int value, int def_value)
692 {
693 if (value)
694 return value;
695 else
696 return def_value;
697 }
698
699 static int sunos_nfs_mount(char *dir_name, int linux_flags, void __user *data)
700 {
701 int server_fd, err;
702 char *the_name, *mount_page;
703 struct nfs_mount_data linux_nfs_mount;
704 struct sunos_nfs_mount_args sunos_mount;
705
706 /* Ok, here comes the fun part: Linux's nfs mount needs a
707 * socket connection to the server, but SunOS mount does not
708 * require this, so we use the information on the destination
709 * address to create a socket and bind it to a reserved
710 * port on this system
711 */
712 if (copy_from_user(&sunos_mount, data, sizeof(sunos_mount)))
713 return -EFAULT;
714
715 server_fd = sys_socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP);
716 if (server_fd < 0)
717 return -ENXIO;
718
719 if (copy_from_user(&linux_nfs_mount.addr,sunos_mount.addr,
720 sizeof(*sunos_mount.addr)) ||
721 copy_from_user(&linux_nfs_mount.root,sunos_mount.fh,
722 sizeof(*sunos_mount.fh))) {
723 sys_close (server_fd);
724 return -EFAULT;
725 }
726
727 if (!sunos_nfs_get_server_fd (server_fd, &linux_nfs_mount.addr)){
728 sys_close (server_fd);
729 return -ENXIO;
730 }
731
732 /* Now, bind it to a locally reserved port */
733 linux_nfs_mount.version = NFS_MOUNT_VERSION;
734 linux_nfs_mount.flags = sunos_mount.flags;
735 linux_nfs_mount.fd = server_fd;
736
737 linux_nfs_mount.rsize = get_default (sunos_mount.rsize, 8192);
738 linux_nfs_mount.wsize = get_default (sunos_mount.wsize, 8192);
739 linux_nfs_mount.timeo = get_default (sunos_mount.timeo, 10);
740 linux_nfs_mount.retrans = sunos_mount.retrans;
741
742 linux_nfs_mount.acregmin = sunos_mount.acregmin;
743 linux_nfs_mount.acregmax = sunos_mount.acregmax;
744 linux_nfs_mount.acdirmin = sunos_mount.acdirmin;
745 linux_nfs_mount.acdirmax = sunos_mount.acdirmax;
746
747 the_name = getname(sunos_mount.hostname);
748 if (IS_ERR(the_name))
749 return PTR_ERR(the_name);
750
751 strlcpy(linux_nfs_mount.hostname, the_name,
752 sizeof(linux_nfs_mount.hostname));
753 putname (the_name);
754
755 mount_page = (char *) get_zeroed_page(GFP_KERNEL);
756 if (!mount_page)
757 return -ENOMEM;
758
759 memcpy(mount_page, &linux_nfs_mount, sizeof(linux_nfs_mount));
760
761 err = do_mount("", dir_name, "nfs", linux_flags, mount_page);
762
763 free_page((unsigned long) mount_page);
764 return err;
765 }
766
767 asmlinkage int
768 sunos_mount(char __user *type, char __user *dir, int flags, void __user *data)
769 {
770 int linux_flags = 0;
771 int ret = -EINVAL;
772 char *dev_fname = NULL;
773 char *dir_page, *type_page;
774
775 if (!capable (CAP_SYS_ADMIN))
776 return -EPERM;
777
778 lock_kernel();
779 /* We don't handle the integer fs type */
780 if ((flags & SMNT_NEWTYPE) == 0)
781 goto out;
782
783 /* Do not allow for those flags we don't support */
784 if (flags & (SMNT_GRPID|SMNT_NOSUB|SMNT_MULTI|SMNT_SYS5))
785 goto out;
786
787 if (flags & SMNT_REMOUNT)
788 linux_flags |= MS_REMOUNT;
789 if (flags & SMNT_RDONLY)
790 linux_flags |= MS_RDONLY;
791 if (flags & SMNT_NOSUID)
792 linux_flags |= MS_NOSUID;
793
794 dir_page = getname(dir);
795 ret = PTR_ERR(dir_page);
796 if (IS_ERR(dir_page))
797 goto out;
798
799 type_page = getname(type);
800 ret = PTR_ERR(type_page);
801 if (IS_ERR(type_page))
802 goto out1;
803
804 if (strcmp(type_page, "ext2") == 0) {
805 dev_fname = getname(data);
806 } else if (strcmp(type_page, "iso9660") == 0) {
807 dev_fname = getname(data);
808 } else if (strcmp(type_page, "minix") == 0) {
809 dev_fname = getname(data);
810 } else if (strcmp(type_page, "nfs") == 0) {
811 ret = sunos_nfs_mount (dir_page, flags, data);
812 goto out2;
813 } else if (strcmp(type_page, "ufs") == 0) {
814 printk("Warning: UFS filesystem mounts unsupported.\n");
815 ret = -ENODEV;
816 goto out2;
817 } else if (strcmp(type_page, "proc")) {
818 ret = -ENODEV;
819 goto out2;
820 }
821 ret = PTR_ERR(dev_fname);
822 if (IS_ERR(dev_fname))
823 goto out2;
824 ret = do_mount(dev_fname, dir_page, type_page, linux_flags, NULL);
825 if (dev_fname)
826 putname(dev_fname);
827 out2:
828 putname(type_page);
829 out1:
830 putname(dir_page);
831 out:
832 unlock_kernel();
833 return ret;
834 }
835
836
837 asmlinkage int sunos_setpgrp(pid_t pid, pid_t pgid)
838 {
839 int ret;
840
841 /* So stupid... */
842 if ((!pid || pid == current->pid) &&
843 !pgid) {
844 sys_setsid();
845 ret = 0;
846 } else {
847 ret = sys_setpgid(pid, pgid);
848 }
849 return ret;
850 }
851
852 /* So stupid... */
853 asmlinkage int sunos_wait4(pid_t pid, unsigned int __user *stat_addr,
854 int options, struct rusage __user*ru)
855 {
856 int ret;
857
858 ret = sys_wait4((pid ? pid : -1), stat_addr, options, ru);
859 return ret;
860 }
861
862 asmlinkage int sunos_killpg(int pgrp, int sig)
863 {
864 int ret;
865
866 rcu_read_lock();
867 ret = -EINVAL;
868 if (pgrp > 0)
869 ret = kill_pgrp(find_vpid(pgrp), sig, 0);
870 rcu_read_unlock();
871
872 return ret;
873 }
874
875 asmlinkage int sunos_audit(void)
876 {
877 lock_kernel();
878 printk ("sys_audit\n");
879 unlock_kernel();
880 return -1;
881 }
882
883 asmlinkage unsigned long sunos_gethostid(void)
884 {
885 unsigned long ret;
886
887 lock_kernel();
888 ret = ((unsigned long)idprom->id_machtype << 24) |
889 (unsigned long)idprom->id_sernum;
890 unlock_kernel();
891 return ret;
892 }
893
894 /* sysconf options, for SunOS compatibility */
895 #define _SC_ARG_MAX 1
896 #define _SC_CHILD_MAX 2
897 #define _SC_CLK_TCK 3
898 #define _SC_NGROUPS_MAX 4
899 #define _SC_OPEN_MAX 5
900 #define _SC_JOB_CONTROL 6
901 #define _SC_SAVED_IDS 7
902 #define _SC_VERSION 8
903
904 asmlinkage long sunos_sysconf (int name)
905 {
906 long ret;
907
908 switch (name){
909 case _SC_ARG_MAX:
910 ret = ARG_MAX;
911 break;
912 case _SC_CHILD_MAX:
913 ret = current->signal->rlim[RLIMIT_NPROC].rlim_cur;
914 break;
915 case _SC_CLK_TCK:
916 ret = HZ;
917 break;
918 case _SC_NGROUPS_MAX:
919 ret = NGROUPS_MAX;
920 break;
921 case _SC_OPEN_MAX:
922 ret = current->signal->rlim[RLIMIT_NOFILE].rlim_cur;
923 break;
924 case _SC_JOB_CONTROL:
925 ret = 1; /* yes, we do support job control */
926 break;
927 case _SC_SAVED_IDS:
928 ret = 1; /* yes, we do support saved uids */
929 break;
930 case _SC_VERSION:
931 /* mhm, POSIX_VERSION is in /usr/include/unistd.h
932 * should it go on /usr/include/linux?
933 */
934 ret = 199009L;
935 break;
936 default:
937 ret = -1;
938 break;
939 };
940 return ret;
941 }
942
943 asmlinkage int sunos_semsys(int op, unsigned long arg1, unsigned long arg2,
944 unsigned long arg3, void *ptr)
945 {
946 union semun arg4;
947 int ret;
948
949 switch (op) {
950 case 0:
951 /* Most arguments match on a 1:1 basis but cmd doesn't */
952 switch(arg3) {
953 case 4:
954 arg3=GETPID; break;
955 case 5:
956 arg3=GETVAL; break;
957 case 6:
958 arg3=GETALL; break;
959 case 3:
960 arg3=GETNCNT; break;
961 case 7:
962 arg3=GETZCNT; break;
963 case 8:
964 arg3=SETVAL; break;
965 case 9:
966 arg3=SETALL; break;
967 }
968 /* sys_semctl(): */
969 /* value to modify semaphore to */
970 arg4.__pad = (void __user *) ptr;
971 ret = sys_semctl((int)arg1, (int)arg2, (int)arg3, arg4 );
972 break;
973 case 1:
974 /* sys_semget(): */
975 ret = sys_semget((key_t)arg1, (int)arg2, (int)arg3);
976 break;
977 case 2:
978 /* sys_semop(): */
979 ret = sys_semop((int)arg1, (struct sembuf __user *)arg2, (unsigned)arg3);
980 break;
981 default:
982 ret = -EINVAL;
983 break;
984 };
985 return ret;
986 }
987
988 asmlinkage int sunos_msgsys(int op, unsigned long arg1, unsigned long arg2,
989 unsigned long arg3, unsigned long arg4)
990 {
991 struct sparc_stackf *sp;
992 unsigned long arg5;
993 int rval;
994
995 switch(op) {
996 case 0:
997 rval = sys_msgget((key_t)arg1, (int)arg2);
998 break;
999 case 1:
1000 rval = sys_msgctl((int)arg1, (int)arg2,
1001 (struct msqid_ds __user *)arg3);
1002 break;
1003 case 2:
1004 lock_kernel();
1005 sp = (struct sparc_stackf *)current->thread.kregs->u_regs[UREG_FP];
1006 arg5 = sp->xxargs[0];
1007 unlock_kernel();
1008 rval = sys_msgrcv((int)arg1, (struct msgbuf __user *)arg2,
1009 (size_t)arg3, (long)arg4, (int)arg5);
1010 break;
1011 case 3:
1012 rval = sys_msgsnd((int)arg1, (struct msgbuf __user *)arg2,
1013 (size_t)arg3, (int)arg4);
1014 break;
1015 default:
1016 rval = -EINVAL;
1017 break;
1018 }
1019 return rval;
1020 }
1021
1022 asmlinkage int sunos_shmsys(int op, unsigned long arg1, unsigned long arg2,
1023 unsigned long arg3)
1024 {
1025 unsigned long raddr;
1026 int rval;
1027
1028 switch(op) {
1029 case 0:
1030 /* do_shmat(): attach a shared memory area */
1031 rval = do_shmat((int)arg1,(char __user *)arg2,(int)arg3,&raddr);
1032 if (!rval)
1033 rval = (int) raddr;
1034 break;
1035 case 1:
1036 /* sys_shmctl(): modify shared memory area attr. */
1037 rval = sys_shmctl((int)arg1,(int)arg2,(struct shmid_ds __user *)arg3);
1038 break;
1039 case 2:
1040 /* sys_shmdt(): detach a shared memory area */
1041 rval = sys_shmdt((char __user *)arg1);
1042 break;
1043 case 3:
1044 /* sys_shmget(): get a shared memory area */
1045 rval = sys_shmget((key_t)arg1,(int)arg2,(int)arg3);
1046 break;
1047 default:
1048 rval = -EINVAL;
1049 break;
1050 };
1051 return rval;
1052 }
1053
1054 #define SUNOS_EWOULDBLOCK 35
1055
1056 /* see the sunos man page read(2v) for an explanation
1057 of this garbage. We use O_NDELAY to mark
1058 file descriptors that have been set non-blocking
1059 using 4.2BSD style calls. (tridge) */
1060
1061 static inline int check_nonblock(int ret, int fd)
1062 {
1063 if (ret == -EAGAIN) {
1064 struct file * file = fget(fd);
1065 if (file) {
1066 if (file->f_flags & O_NDELAY)
1067 ret = -SUNOS_EWOULDBLOCK;
1068 fput(file);
1069 }
1070 }
1071 return ret;
1072 }
1073
1074 asmlinkage int sunos_read(unsigned int fd, char __user *buf, int count)
1075 {
1076 int ret;
1077
1078 ret = check_nonblock(sys_read(fd,buf,count),fd);
1079 return ret;
1080 }
1081
1082 asmlinkage int sunos_readv(unsigned long fd, const struct iovec __user *vector,
1083 long count)
1084 {
1085 int ret;
1086
1087 ret = check_nonblock(sys_readv(fd,vector,count),fd);
1088 return ret;
1089 }
1090
1091 asmlinkage int sunos_write(unsigned int fd, char __user *buf, int count)
1092 {
1093 int ret;
1094
1095 ret = check_nonblock(sys_write(fd,buf,count),fd);
1096 return ret;
1097 }
1098
1099 asmlinkage int sunos_writev(unsigned long fd,
1100 const struct iovec __user *vector, long count)
1101 {
1102 int ret;
1103
1104 ret = check_nonblock(sys_writev(fd,vector,count),fd);
1105 return ret;
1106 }
1107
1108 asmlinkage int sunos_recv(int fd, void __user *ubuf, int size, unsigned flags)
1109 {
1110 int ret;
1111
1112 ret = check_nonblock(sys_recv(fd,ubuf,size,flags),fd);
1113 return ret;
1114 }
1115
1116 asmlinkage int sunos_send(int fd, void __user *buff, int len, unsigned flags)
1117 {
1118 int ret;
1119
1120 ret = check_nonblock(sys_send(fd,buff,len,flags),fd);
1121 return ret;
1122 }
1123
1124 asmlinkage int sunos_accept(int fd, struct sockaddr __user *sa,
1125 int __user *addrlen)
1126 {
1127 int ret;
1128
1129 while (1) {
1130 ret = check_nonblock(sys_accept(fd,sa,addrlen),fd);
1131 if (ret != -ENETUNREACH && ret != -EHOSTUNREACH)
1132 break;
1133 }
1134
1135 return ret;
1136 }
1137
1138 #define SUNOS_SV_INTERRUPT 2
1139
1140 asmlinkage int
1141 sunos_sigaction(int sig, const struct old_sigaction __user *act,
1142 struct old_sigaction __user *oact)
1143 {
1144 struct k_sigaction new_ka, old_ka;
1145 int ret;
1146
1147 if (act) {
1148 old_sigset_t mask;
1149
1150 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
1151 __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
1152 __get_user(new_ka.sa.sa_flags, &act->sa_flags))
1153 return -EFAULT;
1154 __get_user(mask, &act->sa_mask);
1155 new_ka.sa.sa_restorer = NULL;
1156 new_ka.ka_restorer = NULL;
1157 siginitset(&new_ka.sa.sa_mask, mask);
1158 new_ka.sa.sa_flags ^= SUNOS_SV_INTERRUPT;
1159 }
1160
1161 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
1162
1163 if (!ret && oact) {
1164 /* In the clone() case we could copy half consistent
1165 * state to the user, however this could sleep and
1166 * deadlock us if we held the signal lock on SMP. So for
1167 * now I take the easy way out and do no locking.
1168 * But then again we don't support SunOS lwp's anyways ;-)
1169 */
1170 old_ka.sa.sa_flags ^= SUNOS_SV_INTERRUPT;
1171 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
1172 __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
1173 __put_user(old_ka.sa.sa_flags, &oact->sa_flags))
1174 return -EFAULT;
1175 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
1176 }
1177
1178 return ret;
1179 }
1180
1181
1182 asmlinkage int sunos_setsockopt(int fd, int level, int optname,
1183 char __user *optval, int optlen)
1184 {
1185 int tr_opt = optname;
1186 int ret;
1187
1188 if (level == SOL_IP) {
1189 /* Multicast socketopts (ttl, membership) */
1190 if (tr_opt >=2 && tr_opt <= 6)
1191 tr_opt += 30;
1192 }
1193 ret = sys_setsockopt(fd, level, tr_opt, optval, optlen);
1194 return ret;
1195 }
1196
1197 asmlinkage int sunos_getsockopt(int fd, int level, int optname,
1198 char __user *optval, int __user *optlen)
1199 {
1200 int tr_opt = optname;
1201 int ret;
1202
1203 if (level == SOL_IP) {
1204 /* Multicast socketopts (ttl, membership) */
1205 if (tr_opt >=2 && tr_opt <= 6)
1206 tr_opt += 30;
1207 }
1208 ret = sys_getsockopt(fd, level, tr_opt, optval, optlen);
1209 return ret;
1210 }
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