2 * OpenBSD specific assistance routines & VFS ops
3 * Original NetBSD version for Transarc afs by John Kohl <jtk@MIT.EDU>
4 * OpenBSD version by Jim Rees <rees@umich.edu>
11 the regents of the university of michigan
14 permission is granted to use, copy, create derivative works
15 and redistribute this software and such derivative works
16 for any purpose, so long as the name of the university of
17 michigan is not used in any advertising or publicity
18 pertaining to the use or distribution of this software
19 without specific, written prior authorization. if the
20 above copyright notice or any other identification of the
21 university of michigan is included in any copy of any
22 portion of this software, then the disclaimer below must
25 this software is provided as is, without representation
26 from the university of michigan as to its fitness for any
27 purpose, and without warranty by the university of
28 michigan of any kind, either express or implied, including
29 without limitation the implied warranties of
30 merchantability and fitness for a particular purpose. the
31 regents of the university of michigan shall not be liable
32 for any damages, including special, indirect, incidental, or
33 consequential damages, with respect to any claim arising
34 out of or in connection with the use of the software, even
35 if it has been or is hereafter advised of the possibility of
40 Copyright 1995 Massachusetts Institute of Technology. All Rights
43 You are hereby granted a worldwide, irrevocable, paid-up, right and
44 license to use, execute, display, modify, copy and distribute MIT's
45 Modifications, provided that (i) you abide by the terms and conditions
46 of your Transarc AFS License Agreement, and (ii) you do not use the name
47 of MIT in any advertising or publicity without the prior written consent
48 of MIT. MIT disclaims all liability for your use of MIT's
49 Modifications. MIT's Modifications are provided "AS IS" WITHOUT
50 WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO,
51 ANY WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
56 * Some code cribbed from ffs_vfsops and other NetBSD sources, which
60 * Copyright (c) 1989, 1991, 1993, 1994
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64 * modification, are permitted provided that the following conditions
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71 * 3. All advertising materials mentioning features or use of this software
72 * must display the following acknowledgement:
73 * This product includes software developed by the University of
74 * California, Berkeley and its contributors.
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88 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
93 #include <afsconfig.h>
94 #include "afs/param.h"
98 #include "afs/sysincludes.h" /* Standard vendor system headers */
99 #include "afs/afsincludes.h" /* Afs-based standard headers */
100 #include "afs/afs_stats.h" /* statistics */
102 #include <sys/conf.h>
103 #include <sys/exec.h>
105 #include <sys/namei.h>
106 #include <sys/syscall.h>
107 #include <sys/syscallargs.h>
109 /* from /usr/src/sys/kern/vfs_subr.c */
110 extern void insmntque(struct vnode *, struct mount *);
112 #define NBSD_DONTFOLLOW_LINK 0
113 #define NBSD_FOLLOW_LINK 1
115 static int lkmid = -1;
116 static int afs_badcall(struct proc *p, void *xx, register_t *yy);
118 char afs_NetBSD_osname[] = "OpenBSD";
119 struct osi_vfs *afs_globalVFS;
120 struct vcache *afs_globalVp;
136 struct vfsops afs_vfsops = {
153 afs_nbsd_lookupname(char *fnamep,
156 struct vnode **dirvpp,
157 struct vnode **compvpp)
164 * Lookup pathname "fnamep", returning parent directory in
165 * *dirvpp (if non-null) and leaf in *compvpp. segflg says whether the
166 * pathname is user or system space.
169 niflag = (followlink == NBSD_FOLLOW_LINK) ? FOLLOW : NOFOLLOW;
171 niflag |= WANTPARENT; /* XXX LOCKPARENT? */
175 fnamep, osi_curproc());
176 if ((error = namei(&nd)))
203 afs_fhtovp(mp, fhp, vpp)
222 afs_start(mp, flags, p)
227 return (0); /* nothing to do. ? */
231 afs_mount(mp, path, data, ndp, p)
232 register struct mount *mp;
235 struct nameidata *ndp;
238 /* ndp contains the mounted-from device. Just ignore it.
239 we also don't care about our proc struct. */
242 if (mp->mnt_flag & MNT_UPDATE)
246 /* Don't allow remounts */
251 AFS_STATCNT(afs_mount);
253 #ifdef AFS_DISCON_ENV
254 /* initialize the vcache entries before we start using them */
256 /* XXX find a better place for this if possible */
257 init_vcache_entries();
260 mp->osi_vfs_bsize = 8192;
261 mp->osi_vfs_fsid.val[0] = AFS_VFSMAGIC; /* magic */
262 mp->osi_vfs_fsid.val[1] = (int) AFS_VFSFSID;
266 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN-1, &size);
267 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
268 bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
269 strcpy(mp->mnt_stat.f_mntfromname, "AFS");
270 /* null terminated string "AFS" will fit, just leave it be. */
271 strcpy(mp->mnt_stat.f_fstypename, MOUNT_AFS);
272 (void) afs_statfs(mp, &mp->mnt_stat);
278 afs_unmount(afsp, flags, p)
283 extern int sys_ioctl(), sys_setgroups();
285 AFS_STATCNT(afs_unmount);
286 #ifdef AFS_DISCON_ENV
289 if (!afs_globalVFS) {
290 printf("afs already unmounted\n");
294 AFS_RELE(AFSTOV(afs_globalVp));
297 vflush(afsp, NULLVP, 0); /* don't support forced */
298 afsp->mnt_data = NULL;
299 #ifdef AFS_GLOBAL_SUNLOCK
300 mutex_enter(&afs_global_lock);
303 afs_cold_shutdown = 1;
304 afs_shutdown(); /* XXX */
305 #ifdef AFS_GLOBAL_SUNLOCK
306 mutex_exit(&afs_global_lock);
309 /* give up syscall entries for ioctl & setgroups, which we've stolen */
310 sysent[SYS_ioctl].sy_call = sys_ioctl;
311 sysent[SYS_setgroups].sy_call = sys_setgroups;
313 /* give up the stolen syscall entry */
314 sysent[AFS_SYSCALL].sy_narg = 0;
315 sysent[AFS_SYSCALL].sy_argsize = 0;
316 sysent[AFS_SYSCALL].sy_call = afs_badcall;
317 printf("AFS unmounted--use `/sbin/modunload -i %d' to unload before restarting AFS\n", lkmid);
322 afs_badcall(struct proc *p, void *xx, register_t *yy)
328 afs_nbsd_getnewvnode(struct vcache *tvc)
330 while (getnewvnode(VT_AFS, afs_globalVFS, afs_vnodeop_p, &tvc->v)) {
331 /* no vnodes available, force an alloc (limits be damned)! */
334 tvc->v->v_data = (void *)tvc;
338 afs_root(struct mount *mp,
341 struct vrequest treq;
345 AFS_STATCNT(afs_root);
347 #ifdef AFS_GLOBAL_SUNLOCK
348 mutex_enter(&afs_global_lock);
350 if (!(code = afs_InitReq(&treq, osi_curcred())) &&
351 !(code = afs_CheckInit())) {
352 tvp = afs_GetVCache(&afs_rootFid, &treq, NULL, NULL);
354 /* There is really no reason to over-hold this bugger--it's held
355 by the root filesystem reference. */
356 if (afs_globalVp != tvp) {
357 #ifdef AFS_DONT_OVERHOLD_GLOBALVP
359 AFS_RELE(AFSTOV(afs_globalVp));
362 AFS_HOLD(AFSTOV(afs_globalVp));
364 AFSTOV(tvp)->v_flag |= VROOT;
370 #ifdef AFS_GLOBAL_SUNLOCK
371 mutex_exit(&afs_global_lock);
375 vn_lock(*vpp, LK_EXCLUSIVE | LK_RETRY, curproc); /* return it locked */
380 afs_statfs(struct osi_vfs *afsp, struct statfs *abp)
382 AFS_STATCNT(afs_statfs);
383 #ifdef AFS_GLOBAL_SUNLOCK
384 mutex_enter(&afs_global_lock);
386 abp->f_bsize = afsp->osi_vfs_bsize;
387 /* Fake a high number below to satisfy programs that use the ustat (for AIX), or statfs (for the rest) call to make sure that there's enough space in the device partition before storing something there (like ed(1)) */
388 abp->f_blocks = abp->f_bfree = abp->f_bavail = abp->f_files = abp->f_ffree = 9000000; /* XXX */
389 abp->f_fsid.val[0] = AFS_VFSMAGIC; /* magic */
390 abp->f_fsid.val[1] = (int) AFS_VFSFSID;
391 #ifdef AFS_GLOBAL_SUNLOCK
392 mutex_exit(&afs_global_lock);
398 afs_sync(struct osi_vfs *afsp)
400 AFS_STATCNT(afs_sync);
401 #if defined(AFS_DISCON_ENV) && !defined(AFS_OBSD_ENV)
402 /* Can't do this in OpenBSD 2.7, it faults when called from apm_suspend() */
403 store_dirty_vcaches();
409 afs_nbsd_ref(struct vnode *vp)
411 if (vp->v_usecount == 0) {
412 vprint("holding unheld node", vp);
419 afs_nbsd_rele(struct vnode *vp)
421 if (vp->v_usecount <= 0) {
422 vprint("rele'ing unheld node", vp);
435 if (vp->v_usecount < 0) {
436 vprint("bad usecount", vp);
439 error = vget(vp, lfl, curproc);
441 insmntque(vp, afs_globalVFS); /* take off free list */
445 extern struct vfsops afs_vfsops;
446 extern struct vnodeopv_desc afs_vnodeop_opv_desc;
448 static struct vfsconf afs_vfsconf = {
458 MOD_VFS("afs", 0, &afs_vfsconf);
460 static char afsgenmem[] = "afsgenmem";
461 static char afsfidmem[] = "afsfidmem";
462 static char afsbhdrmem[] = "afsbhdrmem";
463 static char afsbfrmem[] = "afsbfrmem";
468 extern int afs3_syscall(), afs_xioctl(), Afs_xsetgroups(), afs_xflock();
470 sysent[AFS_SYSCALL].sy_call = afs3_syscall;
471 sysent[AFS_SYSCALL].sy_narg = 6;
472 sysent[AFS_SYSCALL].sy_argsize = 6 * sizeof(long);
473 sysent[54].sy_call = afs_xioctl;
474 sysent[80].sy_call = Afs_xsetgroups;
480 afs_vfs_load(struct lkm_table *lkmtp,
483 extern char *memname[];
485 vfs_opv_init_explicit(&afs_vnodeop_opv_desc);
486 vfs_opv_init_default(&afs_vnodeop_opv_desc);
487 if (memname[M_AFSGENERIC] == NULL)
488 memname[M_AFSGENERIC] = afsgenmem;
489 if (memname[M_AFSFID] == NULL)
490 memname[M_AFSFID] = afsfidmem;
491 if (memname[M_AFSBUFHDR] == NULL)
492 memname[M_AFSBUFHDR] = afsbhdrmem;
493 if (memname[M_AFSBUFFER] == NULL)
494 memname[M_AFSBUFFER] = afsbfrmem;
496 printf("OpenAFS ($Revision$) lkm loaded\n");
501 afs_vfs_unload(struct lkm_table *lktmp,
504 extern char *memname[];
505 extern int sys_lkmnosys();
509 if (sysent[SYS_ioctl].sy_call != sys_ioctl)
512 if (memname[M_AFSGENERIC] == afsgenmem)
513 memname[M_AFSGENERIC] = NULL;
514 if (memname[M_AFSFID] == afsfidmem)
515 memname[M_AFSFID] = NULL;
516 if (memname[M_AFSBUFHDR] == afsbhdrmem)
517 memname[M_AFSBUFHDR] = NULL;
518 if (memname[M_AFSBUFFER] == afsbfrmem)
519 memname[M_AFSBUFFER] = NULL;
521 sysent[AFS_SYSCALL].sy_call = sys_lkmnosys;
522 printf("OpenAFS unloaded\n");
529 afsmodload(struct lkm_table *lkmtp,
533 extern int sys_lkmnosys();
535 if (cmd == LKM_E_LOAD) {
536 if (strcmp(ostype,afs_NetBSD_osname)) {
537 printf("This is %s version %s\n", ostype, osrelease);
538 printf("This version of AFS is only for %s\n",
540 /* return EPROGMISMATCH;*/
542 if (sysent[AFS_SYSCALL].sy_call != sys_lkmnosys) {
543 printf("AFS must be loaded with syscall %d assigned to sys_lkmnosys\nIs AFS already loaded?\n",
548 DISPATCH(lkmtp,cmd,ver,afs_vfs_load,afs_vfs_unload,lkm_nofunc);