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[SERIAL] Make uart_line_info() correctly tell MMIO from I/O port
[linux-2.6/openmoko-kernel/knife-kernel.git] / arch / sparc / kernel / sys_sunos.c
blobaa0fb2efb6154241032343e30a748cea59dc5739
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_dentry->d_inode) == MEM_MAJOR &&
98 iminor(file->f_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, ino_t ino, unsigned int d_type)
329 {
330 struct sunos_dirent __user *dirent;
331 struct sunos_dirent_callback * buf = __buf;
332 int reclen = ROUND_UP(NAME_OFFSET(dirent) + namlen + 1);
333
334 buf->error = -EINVAL; /* only used if we fail.. */
335 if (reclen > buf->count)
336 return -EINVAL;
337 dirent = buf->previous;
338 if (dirent)
339 put_user(offset, &dirent->d_off);
340 dirent = buf->curr;
341 buf->previous = dirent;
342 put_user(ino, &dirent->d_ino);
343 put_user(namlen, &dirent->d_namlen);
344 put_user(reclen, &dirent->d_reclen);
345 copy_to_user(dirent->d_name, name, namlen);
346 put_user(0, dirent->d_name + namlen);
347 dirent = (void __user *) dirent + reclen;
348 buf->curr = dirent;
349 buf->count -= reclen;
350 return 0;
351 }
352
353 asmlinkage int sunos_getdents(unsigned int fd, void __user *dirent, int cnt)
354 {
355 struct file * file;
356 struct sunos_dirent __user *lastdirent;
357 struct sunos_dirent_callback buf;
358 int error = -EBADF;
359
360 if (fd >= SUNOS_NR_OPEN)
361 goto out;
362
363 file = fget(fd);
364 if (!file)
365 goto out;
366
367 error = -EINVAL;
368 if (cnt < (sizeof(struct sunos_dirent) + 255))
369 goto out_putf;
370
371 buf.curr = (struct sunos_dirent __user *) dirent;
372 buf.previous = NULL;
373 buf.count = cnt;
374 buf.error = 0;
375
376 error = vfs_readdir(file, sunos_filldir, &buf);
377 if (error < 0)
378 goto out_putf;
379
380 lastdirent = buf.previous;
381 error = buf.error;
382 if (lastdirent) {
383 put_user(file->f_pos, &lastdirent->d_off);
384 error = cnt - buf.count;
385 }
386
387 out_putf:
388 fput(file);
389 out:
390 return error;
391 }
392
393 /* Old sunos getdirentries, severely broken compatibility stuff here. */
394 struct sunos_direntry {
395 unsigned long d_ino;
396 unsigned short d_reclen;
397 unsigned short d_namlen;
398 char d_name[1];
399 };
400
401 struct sunos_direntry_callback {
402 struct sunos_direntry __user *curr;
403 struct sunos_direntry __user *previous;
404 int count;
405 int error;
406 };
407
408 static int sunos_filldirentry(void * __buf, const char * name, int namlen,
409 loff_t offset, ino_t ino, unsigned int d_type)
410 {
411 struct sunos_direntry __user *dirent;
412 struct sunos_direntry_callback *buf = __buf;
413 int reclen = ROUND_UP(NAME_OFFSET(dirent) + namlen + 1);
414
415 buf->error = -EINVAL; /* only used if we fail.. */
416 if (reclen > buf->count)
417 return -EINVAL;
418 dirent = buf->previous;
419 dirent = buf->curr;
420 buf->previous = dirent;
421 put_user(ino, &dirent->d_ino);
422 put_user(namlen, &dirent->d_namlen);
423 put_user(reclen, &dirent->d_reclen);
424 copy_to_user(dirent->d_name, name, namlen);
425 put_user(0, dirent->d_name + namlen);
426 dirent = (void __user *) dirent + reclen;
427 buf->curr = dirent;
428 buf->count -= reclen;
429 return 0;
430 }
431
432 asmlinkage int sunos_getdirentries(unsigned int fd, void __user *dirent,
433 int cnt, unsigned int __user *basep)
434 {
435 struct file * file;
436 struct sunos_direntry __user *lastdirent;
437 struct sunos_direntry_callback buf;
438 int error = -EBADF;
439
440 if (fd >= SUNOS_NR_OPEN)
441 goto out;
442
443 file = fget(fd);
444 if (!file)
445 goto out;
446
447 error = -EINVAL;
448 if (cnt < (sizeof(struct sunos_direntry) + 255))
449 goto out_putf;
450
451 buf.curr = (struct sunos_direntry __user *) dirent;
452 buf.previous = NULL;
453 buf.count = cnt;
454 buf.error = 0;
455
456 error = vfs_readdir(file, sunos_filldirentry, &buf);
457 if (error < 0)
458 goto out_putf;
459
460 lastdirent = buf.previous;
461 error = buf.error;
462 if (lastdirent) {
463 put_user(file->f_pos, basep);
464 error = cnt - buf.count;
465 }
466
467 out_putf:
468 fput(file);
469 out:
470 return error;
471 }
472
473 struct sunos_utsname {
474 char sname[9];
475 char nname[9];
476 char nnext[56];
477 char rel[9];
478 char ver[9];
479 char mach[9];
480 };
481
482 asmlinkage int sunos_uname(struct sunos_utsname __user *name)
483 {
484 int ret;
485 down_read(&uts_sem);
486 ret = copy_to_user(&name->sname[0], &system_utsname.sysname[0], sizeof(name->sname) - 1);
487 if (!ret) {
488 ret |= __copy_to_user(&name->nname[0], &system_utsname.nodename[0], sizeof(name->nname) - 1);
489 ret |= __put_user('\0', &name->nname[8]);
490 ret |= __copy_to_user(&name->rel[0], &system_utsname.release[0], sizeof(name->rel) - 1);
491 ret |= __copy_to_user(&name->ver[0], &system_utsname.version[0], sizeof(name->ver) - 1);
492 ret |= __copy_to_user(&name->mach[0], &system_utsname.machine[0], sizeof(name->mach) - 1);
493 }
494 up_read(&uts_sem);
495 return ret ? -EFAULT : 0;
496 }
497
498 asmlinkage int sunos_nosys(void)
499 {
500 struct pt_regs *regs;
501 siginfo_t info;
502 static int cnt;
503
504 lock_kernel();
505 regs = current->thread.kregs;
506 info.si_signo = SIGSYS;
507 info.si_errno = 0;
508 info.si_code = __SI_FAULT|0x100;
509 info.si_addr = (void __user *)regs->pc;
510 info.si_trapno = regs->u_regs[UREG_G1];
511 send_sig_info(SIGSYS, &info, current);
512 if (cnt++ < 4) {
513 printk("Process makes ni_syscall number %d, register dump:\n",
514 (int) regs->u_regs[UREG_G1]);
515 show_regs(regs);
516 }
517 unlock_kernel();
518 return -ENOSYS;
519 }
520
521 /* This is not a real and complete implementation yet, just to keep
522 * the easy SunOS binaries happy.
523 */
524 asmlinkage int sunos_fpathconf(int fd, int name)
525 {
526 int ret;
527
528 switch(name) {
529 case _PCONF_LINK:
530 ret = LINK_MAX;
531 break;
532 case _PCONF_CANON:
533 ret = MAX_CANON;
534 break;
535 case _PCONF_INPUT:
536 ret = MAX_INPUT;
537 break;
538 case _PCONF_NAME:
539 ret = NAME_MAX;
540 break;
541 case _PCONF_PATH:
542 ret = PATH_MAX;
543 break;
544 case _PCONF_PIPE:
545 ret = PIPE_BUF;
546 break;
547 case _PCONF_CHRESTRICT: /* XXX Investigate XXX */
548 ret = 1;
549 break;
550 case _PCONF_NOTRUNC: /* XXX Investigate XXX */
551 case _PCONF_VDISABLE:
552 ret = 0;
553 break;
554 default:
555 ret = -EINVAL;
556 break;
557 }
558 return ret;
559 }
560
561 asmlinkage int sunos_pathconf(char __user *path, int name)
562 {
563 int ret;
564
565 ret = sunos_fpathconf(0, name); /* XXX cheese XXX */
566 return ret;
567 }
568
569 /* SunOS mount system call emulation */
570
571 asmlinkage int sunos_select(int width, fd_set __user *inp, fd_set __user *outp,
572 fd_set __user *exp, struct timeval __user *tvp)
573 {
574 int ret;
575
576 /* SunOS binaries expect that select won't change the tvp contents */
577 ret = sys_select (width, inp, outp, exp, tvp);
578 if (ret == -EINTR && tvp) {
579 time_t sec, usec;
580
581 __get_user(sec, &tvp->tv_sec);
582 __get_user(usec, &tvp->tv_usec);
583
584 if (sec == 0 && usec == 0)
585 ret = 0;
586 }
587 return ret;
588 }
589
590 asmlinkage void sunos_nop(void)
591 {
592 return;
593 }
594
595 /* SunOS mount/umount. */
596 #define SMNT_RDONLY 1
597 #define SMNT_NOSUID 2
598 #define SMNT_NEWTYPE 4
599 #define SMNT_GRPID 8
600 #define SMNT_REMOUNT 16
601 #define SMNT_NOSUB 32
602 #define SMNT_MULTI 64
603 #define SMNT_SYS5 128
604
605 struct sunos_fh_t {
606 char fh_data [NFS_FHSIZE];
607 };
608
609 struct sunos_nfs_mount_args {
610 struct sockaddr_in __user *addr; /* file server address */
611 struct nfs_fh __user *fh; /* File handle to be mounted */
612 int flags; /* flags */
613 int wsize; /* write size in bytes */
614 int rsize; /* read size in bytes */
615 int timeo; /* initial timeout in .1 secs */
616 int retrans; /* times to retry send */
617 char __user *hostname; /* server's hostname */
618 int acregmin; /* attr cache file min secs */
619 int acregmax; /* attr cache file max secs */
620 int acdirmin; /* attr cache dir min secs */
621 int acdirmax; /* attr cache dir max secs */
622 char __user *netname; /* server's netname */
623 };
624
625
626 /* Bind the socket on a local reserved port and connect it to the
627 * remote server. This on Linux/i386 is done by the mount program,
628 * not by the kernel.
629 */
630 static int
631 sunos_nfs_get_server_fd (int fd, struct sockaddr_in *addr)
632 {
633 struct sockaddr_in local;
634 struct sockaddr_in server;
635 int try_port;
636 struct socket *socket;
637 struct inode *inode;
638 struct file *file;
639 int ret, result = 0;
640
641 file = fget(fd);
642 if (!file)
643 goto out;
644
645 inode = file->f_dentry->d_inode;
646
647 socket = SOCKET_I(inode);
648 local.sin_family = AF_INET;
649 local.sin_addr.s_addr = INADDR_ANY;
650
651 /* IPPORT_RESERVED = 1024, can't find the definition in the kernel */
652 try_port = 1024;
653 do {
654 local.sin_port = htons (--try_port);
655 ret = socket->ops->bind(socket, (struct sockaddr*)&local,
656 sizeof(local));
657 } while (ret && try_port > (1024 / 2));
658
659 if (ret)
660 goto out_putf;
661
662 server.sin_family = AF_INET;
663 server.sin_addr = addr->sin_addr;
664 server.sin_port = NFS_PORT;
665
666 /* Call sys_connect */
667 ret = socket->ops->connect (socket, (struct sockaddr *) &server,
668 sizeof (server), file->f_flags);
669 if (ret >= 0)
670 result = 1;
671
672 out_putf:
673 fput(file);
674 out:
675 return result;
676 }
677
678 static int get_default (int value, int def_value)
679 {
680 if (value)
681 return value;
682 else
683 return def_value;
684 }
685
686 static int sunos_nfs_mount(char *dir_name, int linux_flags, void __user *data)
687 {
688 int server_fd, err;
689 char *the_name, *mount_page;
690 struct nfs_mount_data linux_nfs_mount;
691 struct sunos_nfs_mount_args sunos_mount;
692
693 /* Ok, here comes the fun part: Linux's nfs mount needs a
694 * socket connection to the server, but SunOS mount does not
695 * require this, so we use the information on the destination
696 * address to create a socket and bind it to a reserved
697 * port on this system
698 */
699 if (copy_from_user(&sunos_mount, data, sizeof(sunos_mount)))
700 return -EFAULT;
701
702 server_fd = sys_socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP);
703 if (server_fd < 0)
704 return -ENXIO;
705
706 if (copy_from_user(&linux_nfs_mount.addr,sunos_mount.addr,
707 sizeof(*sunos_mount.addr)) ||
708 copy_from_user(&linux_nfs_mount.root,sunos_mount.fh,
709 sizeof(*sunos_mount.fh))) {
710 sys_close (server_fd);
711 return -EFAULT;
712 }
713
714 if (!sunos_nfs_get_server_fd (server_fd, &linux_nfs_mount.addr)){
715 sys_close (server_fd);
716 return -ENXIO;
717 }
718
719 /* Now, bind it to a locally reserved port */
720 linux_nfs_mount.version = NFS_MOUNT_VERSION;
721 linux_nfs_mount.flags = sunos_mount.flags;
722 linux_nfs_mount.fd = server_fd;
723
724 linux_nfs_mount.rsize = get_default (sunos_mount.rsize, 8192);
725 linux_nfs_mount.wsize = get_default (sunos_mount.wsize, 8192);
726 linux_nfs_mount.timeo = get_default (sunos_mount.timeo, 10);
727 linux_nfs_mount.retrans = sunos_mount.retrans;
728
729 linux_nfs_mount.acregmin = sunos_mount.acregmin;
730 linux_nfs_mount.acregmax = sunos_mount.acregmax;
731 linux_nfs_mount.acdirmin = sunos_mount.acdirmin;
732 linux_nfs_mount.acdirmax = sunos_mount.acdirmax;
733
734 the_name = getname(sunos_mount.hostname);
735 if (IS_ERR(the_name))
736 return PTR_ERR(the_name);
737
738 strlcpy(linux_nfs_mount.hostname, the_name,
739 sizeof(linux_nfs_mount.hostname));
740 putname (the_name);
741
742 mount_page = (char *) get_zeroed_page(GFP_KERNEL);
743 if (!mount_page)
744 return -ENOMEM;
745
746 memcpy(mount_page, &linux_nfs_mount, sizeof(linux_nfs_mount));
747
748 err = do_mount("", dir_name, "nfs", linux_flags, mount_page);
749
750 free_page((unsigned long) mount_page);
751 return err;
752 }
753
754 asmlinkage int
755 sunos_mount(char __user *type, char __user *dir, int flags, void __user *data)
756 {
757 int linux_flags = 0;
758 int ret = -EINVAL;
759 char *dev_fname = NULL;
760 char *dir_page, *type_page;
761
762 if (!capable (CAP_SYS_ADMIN))
763 return -EPERM;
764
765 lock_kernel();
766 /* We don't handle the integer fs type */
767 if ((flags & SMNT_NEWTYPE) == 0)
768 goto out;
769
770 /* Do not allow for those flags we don't support */
771 if (flags & (SMNT_GRPID|SMNT_NOSUB|SMNT_MULTI|SMNT_SYS5))
772 goto out;
773
774 if (flags & SMNT_REMOUNT)
775 linux_flags |= MS_REMOUNT;
776 if (flags & SMNT_RDONLY)
777 linux_flags |= MS_RDONLY;
778 if (flags & SMNT_NOSUID)
779 linux_flags |= MS_NOSUID;
780
781 dir_page = getname(dir);
782 ret = PTR_ERR(dir_page);
783 if (IS_ERR(dir_page))
784 goto out;
785
786 type_page = getname(type);
787 ret = PTR_ERR(type_page);
788 if (IS_ERR(type_page))
789 goto out1;
790
791 if (strcmp(type_page, "ext2") == 0) {
792 dev_fname = getname(data);
793 } else if (strcmp(type_page, "iso9660") == 0) {
794 dev_fname = getname(data);
795 } else if (strcmp(type_page, "minix") == 0) {
796 dev_fname = getname(data);
797 } else if (strcmp(type_page, "nfs") == 0) {
798 ret = sunos_nfs_mount (dir_page, flags, data);
799 goto out2;
800 } else if (strcmp(type_page, "ufs") == 0) {
801 printk("Warning: UFS filesystem mounts unsupported.\n");
802 ret = -ENODEV;
803 goto out2;
804 } else if (strcmp(type_page, "proc")) {
805 ret = -ENODEV;
806 goto out2;
807 }
808 ret = PTR_ERR(dev_fname);
809 if (IS_ERR(dev_fname))
810 goto out2;
811 ret = do_mount(dev_fname, dir_page, type_page, linux_flags, NULL);
812 if (dev_fname)
813 putname(dev_fname);
814 out2:
815 putname(type_page);
816 out1:
817 putname(dir_page);
818 out:
819 unlock_kernel();
820 return ret;
821 }
822
823
824 asmlinkage int sunos_setpgrp(pid_t pid, pid_t pgid)
825 {
826 int ret;
827
828 /* So stupid... */
829 if ((!pid || pid == current->pid) &&
830 !pgid) {
831 sys_setsid();
832 ret = 0;
833 } else {
834 ret = sys_setpgid(pid, pgid);
835 }
836 return ret;
837 }
838
839 /* So stupid... */
840 asmlinkage int sunos_wait4(pid_t pid, unsigned int __user *stat_addr,
841 int options, struct rusage __user*ru)
842 {
843 int ret;
844
845 ret = sys_wait4((pid ? pid : -1), stat_addr, options, ru);
846 return ret;
847 }
848
849 extern int kill_pg(int, int, int);
850 asmlinkage int sunos_killpg(int pgrp, int sig)
851 {
852 int ret;
853
854 lock_kernel();
855 ret = kill_pg(pgrp, sig, 0);
856 unlock_kernel();
857 return ret;
858 }
859
860 asmlinkage int sunos_audit(void)
861 {
862 lock_kernel();
863 printk ("sys_audit\n");
864 unlock_kernel();
865 return -1;
866 }
867
868 asmlinkage unsigned long sunos_gethostid(void)
869 {
870 unsigned long ret;
871
872 lock_kernel();
873 ret = ((unsigned long)idprom->id_machtype << 24) |
874 (unsigned long)idprom->id_sernum;
875 unlock_kernel();
876 return ret;
877 }
878
879 /* sysconf options, for SunOS compatibility */
880 #define _SC_ARG_MAX 1
881 #define _SC_CHILD_MAX 2
882 #define _SC_CLK_TCK 3
883 #define _SC_NGROUPS_MAX 4
884 #define _SC_OPEN_MAX 5
885 #define _SC_JOB_CONTROL 6
886 #define _SC_SAVED_IDS 7
887 #define _SC_VERSION 8
888
889 asmlinkage long sunos_sysconf (int name)
890 {
891 long ret;
892
893 switch (name){
894 case _SC_ARG_MAX:
895 ret = ARG_MAX;
896 break;
897 case _SC_CHILD_MAX:
898 ret = -1; /* no limit */
899 break;
900 case _SC_CLK_TCK:
901 ret = HZ;
902 break;
903 case _SC_NGROUPS_MAX:
904 ret = NGROUPS_MAX;
905 break;
906 case _SC_OPEN_MAX:
907 ret = OPEN_MAX;
908 break;
909 case _SC_JOB_CONTROL:
910 ret = 1; /* yes, we do support job control */
911 break;
912 case _SC_SAVED_IDS:
913 ret = 1; /* yes, we do support saved uids */
914 break;
915 case _SC_VERSION:
916 /* mhm, POSIX_VERSION is in /usr/include/unistd.h
917 * should it go on /usr/include/linux?
918 */
919 ret = 199009L;
920 break;
921 default:
922 ret = -1;
923 break;
924 };
925 return ret;
926 }
927
928 asmlinkage int sunos_semsys(int op, unsigned long arg1, unsigned long arg2,
929 unsigned long arg3, void *ptr)
930 {
931 union semun arg4;
932 int ret;
933
934 switch (op) {
935 case 0:
936 /* Most arguments match on a 1:1 basis but cmd doesn't */
937 switch(arg3) {
938 case 4:
939 arg3=GETPID; break;
940 case 5:
941 arg3=GETVAL; break;
942 case 6:
943 arg3=GETALL; break;
944 case 3:
945 arg3=GETNCNT; break;
946 case 7:
947 arg3=GETZCNT; break;
948 case 8:
949 arg3=SETVAL; break;
950 case 9:
951 arg3=SETALL; break;
952 }
953 /* sys_semctl(): */
954 /* value to modify semaphore to */
955 arg4.__pad = (void __user *) ptr;
956 ret = sys_semctl((int)arg1, (int)arg2, (int)arg3, arg4 );
957 break;
958 case 1:
959 /* sys_semget(): */
960 ret = sys_semget((key_t)arg1, (int)arg2, (int)arg3);
961 break;
962 case 2:
963 /* sys_semop(): */
964 ret = sys_semop((int)arg1, (struct sembuf __user *)arg2, (unsigned)arg3);
965 break;
966 default:
967 ret = -EINVAL;
968 break;
969 };
970 return ret;
971 }
972
973 asmlinkage int sunos_msgsys(int op, unsigned long arg1, unsigned long arg2,
974 unsigned long arg3, unsigned long arg4)
975 {
976 struct sparc_stackf *sp;
977 unsigned long arg5;
978 int rval;
979
980 switch(op) {
981 case 0:
982 rval = sys_msgget((key_t)arg1, (int)arg2);
983 break;
984 case 1:
985 rval = sys_msgctl((int)arg1, (int)arg2,
986 (struct msqid_ds __user *)arg3);
987 break;
988 case 2:
989 lock_kernel();
990 sp = (struct sparc_stackf *)current->thread.kregs->u_regs[UREG_FP];
991 arg5 = sp->xxargs[0];
992 unlock_kernel();
993 rval = sys_msgrcv((int)arg1, (struct msgbuf __user *)arg2,
994 (size_t)arg3, (long)arg4, (int)arg5);
995 break;
996 case 3:
997 rval = sys_msgsnd((int)arg1, (struct msgbuf __user *)arg2,
998 (size_t)arg3, (int)arg4);
999 break;
1000 default:
1001 rval = -EINVAL;
1002 break;
1003 }
1004 return rval;
1005 }
1006
1007 asmlinkage int sunos_shmsys(int op, unsigned long arg1, unsigned long arg2,
1008 unsigned long arg3)
1009 {
1010 unsigned long raddr;
1011 int rval;
1012
1013 switch(op) {
1014 case 0:
1015 /* do_shmat(): attach a shared memory area */
1016 rval = do_shmat((int)arg1,(char __user *)arg2,(int)arg3,&raddr);
1017 if (!rval)
1018 rval = (int) raddr;
1019 break;
1020 case 1:
1021 /* sys_shmctl(): modify shared memory area attr. */
1022 rval = sys_shmctl((int)arg1,(int)arg2,(struct shmid_ds __user *)arg3);
1023 break;
1024 case 2:
1025 /* sys_shmdt(): detach a shared memory area */
1026 rval = sys_shmdt((char __user *)arg1);
1027 break;
1028 case 3:
1029 /* sys_shmget(): get a shared memory area */
1030 rval = sys_shmget((key_t)arg1,(int)arg2,(int)arg3);
1031 break;
1032 default:
1033 rval = -EINVAL;
1034 break;
1035 };
1036 return rval;
1037 }
1038
1039 #define SUNOS_EWOULDBLOCK 35
1040
1041 /* see the sunos man page read(2v) for an explanation
1042 of this garbage. We use O_NDELAY to mark
1043 file descriptors that have been set non-blocking
1044 using 4.2BSD style calls. (tridge) */
1045
1046 static inline int check_nonblock(int ret, int fd)
1047 {
1048 if (ret == -EAGAIN) {
1049 struct file * file = fget(fd);
1050 if (file) {
1051 if (file->f_flags & O_NDELAY)
1052 ret = -SUNOS_EWOULDBLOCK;
1053 fput(file);
1054 }
1055 }
1056 return ret;
1057 }
1058
1059 asmlinkage int sunos_read(unsigned int fd, char __user *buf, int count)
1060 {
1061 int ret;
1062
1063 ret = check_nonblock(sys_read(fd,buf,count),fd);
1064 return ret;
1065 }
1066
1067 asmlinkage int sunos_readv(unsigned long fd, const struct iovec __user *vector,
1068 long count)
1069 {
1070 int ret;
1071
1072 ret = check_nonblock(sys_readv(fd,vector,count),fd);
1073 return ret;
1074 }
1075
1076 asmlinkage int sunos_write(unsigned int fd, char __user *buf, int count)
1077 {
1078 int ret;
1079
1080 ret = check_nonblock(sys_write(fd,buf,count),fd);
1081 return ret;
1082 }
1083
1084 asmlinkage int sunos_writev(unsigned long fd,
1085 const struct iovec __user *vector, long count)
1086 {
1087 int ret;
1088
1089 ret = check_nonblock(sys_writev(fd,vector,count),fd);
1090 return ret;
1091 }
1092
1093 asmlinkage int sunos_recv(int fd, void __user *ubuf, int size, unsigned flags)
1094 {
1095 int ret;
1096
1097 ret = check_nonblock(sys_recv(fd,ubuf,size,flags),fd);
1098 return ret;
1099 }
1100
1101 asmlinkage int sunos_send(int fd, void __user *buff, int len, unsigned flags)
1102 {
1103 int ret;
1104
1105 ret = check_nonblock(sys_send(fd,buff,len,flags),fd);
1106 return ret;
1107 }
1108
1109 asmlinkage int sunos_accept(int fd, struct sockaddr __user *sa,
1110 int __user *addrlen)
1111 {
1112 int ret;
1113
1114 while (1) {
1115 ret = check_nonblock(sys_accept(fd,sa,addrlen),fd);
1116 if (ret != -ENETUNREACH && ret != -EHOSTUNREACH)
1117 break;
1118 }
1119
1120 return ret;
1121 }
1122
1123 #define SUNOS_SV_INTERRUPT 2
1124
1125 asmlinkage int
1126 sunos_sigaction(int sig, const struct old_sigaction __user *act,
1127 struct old_sigaction __user *oact)
1128 {
1129 struct k_sigaction new_ka, old_ka;
1130 int ret;
1131
1132 if (act) {
1133 old_sigset_t mask;
1134
1135 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
1136 __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
1137 __get_user(new_ka.sa.sa_flags, &act->sa_flags))
1138 return -EFAULT;
1139 __get_user(mask, &act->sa_mask);
1140 new_ka.sa.sa_restorer = NULL;
1141 new_ka.ka_restorer = NULL;
1142 siginitset(&new_ka.sa.sa_mask, mask);
1143 new_ka.sa.sa_flags ^= SUNOS_SV_INTERRUPT;
1144 }
1145
1146 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
1147
1148 if (!ret && oact) {
1149 /* In the clone() case we could copy half consistent
1150 * state to the user, however this could sleep and
1151 * deadlock us if we held the signal lock on SMP. So for
1152 * now I take the easy way out and do no locking.
1153 * But then again we don't support SunOS lwp's anyways ;-)
1154 */
1155 old_ka.sa.sa_flags ^= SUNOS_SV_INTERRUPT;
1156 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
1157 __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
1158 __put_user(old_ka.sa.sa_flags, &oact->sa_flags))
1159 return -EFAULT;
1160 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
1161 }
1162
1163 return ret;
1164 }
1165
1166
1167 asmlinkage int sunos_setsockopt(int fd, int level, int optname,
1168 char __user *optval, int optlen)
1169 {
1170 int tr_opt = optname;
1171 int ret;
1172
1173 if (level == SOL_IP) {
1174 /* Multicast socketopts (ttl, membership) */
1175 if (tr_opt >=2 && tr_opt <= 6)
1176 tr_opt += 30;
1177 }
1178 ret = sys_setsockopt(fd, level, tr_opt, optval, optlen);
1179 return ret;
1180 }
1181
1182 asmlinkage int sunos_getsockopt(int fd, int level, int optname,
1183 char __user *optval, int __user *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_getsockopt(fd, level, tr_opt, optval, optlen);
1194 return ret;
1195 }
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