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>
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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
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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 the OpenAFS License Agreement, and (ii) you do not use the name
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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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72 * must display the following acknowledgement:
73 * This product includes software developed by the University of
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93 #include <afsconfig.h>
94 #include "afs/param.h"
99 #include "afs/sysincludes.h" /* Standard vendor system headers */
100 #include "afs/afsincludes.h" /* Afs-based standard headers */
101 #include "afs/afs_stats.h" /* statistics */
103 #include <sys/conf.h>
104 #include <sys/exec.h>
106 #include <sys/namei.h>
107 #include <sys/syscall.h>
108 #include <sys/syscallargs.h>
110 /* from /usr/src/sys/kern/vfs_subr.c */
111 extern void insmntque(struct vnode *, struct mount *);
113 extern int sys_lkmnosys(), afs3_syscall(), afs_xioctl(), Afs_xsetgroups();
115 static int lkmid = -1;
116 static int afs_badcall(struct proc *p, void *xx, register_t * yy);
117 static struct sysent old_sysent;
119 char afs_NetBSD_osname[] = "OpenBSD";
120 struct osi_vfs *afs_globalVFS;
121 struct vcache *afs_globalVp;
137 struct vfsops afs_vfsops = {
154 afs_nbsd_lookupname(char *fnamep, enum uio_seg segflg, int followlink,
155 struct vnode **dirvpp, struct vnode **compvpp)
162 * Lookup pathname "fnamep", returning parent directory in
163 * *dirvpp (if non-null) and leaf in *compvpp. segflg says whether the
164 * pathname is user or system space.
167 niflag = followlink ? FOLLOW : NOFOLLOW;
169 niflag |= WANTPARENT; /* XXX LOCKPARENT? */
170 NDINIT(&nd, LOOKUP, niflag, segflg, fnamep, osi_curproc());
171 if ((error = namei(&nd)))
198 afs_fhtovp(mp, fhp, vpp)
217 afs_start(mp, flags, p)
222 return (0); /* nothing to do. ? */
226 afs_mount(mp, path, data, ndp, p)
227 register struct mount *mp;
230 struct nameidata *ndp;
233 /* ndp contains the mounted-from device. Just ignore it.
234 * we also don't care about our proc struct. */
237 if (mp->mnt_flag & MNT_UPDATE)
241 /* Don't allow remounts */
245 AFS_STATCNT(afs_mount);
247 #ifdef AFS_DISCON_ENV
248 /* initialize the vcache entries before we start using them */
250 /* XXX find a better place for this if possible */
251 init_vcache_entries();
254 mp->osi_vfs_bsize = 8192;
255 mp->osi_vfs_fsid.val[0] = AFS_VFSMAGIC; /* magic */
256 mp->osi_vfs_fsid.val[1] = (int)AFS_VFSFSID;
258 (void)copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
259 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
260 bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
261 strcpy(mp->mnt_stat.f_mntfromname, "AFS");
262 /* null terminated string "AFS" will fit, just leave it be. */
263 strcpy(mp->mnt_stat.f_fstypename, MOUNT_AFS);
264 (void)afs_statfs(mp, &mp->mnt_stat);
270 afs_unmount(afsp, flags, p)
275 extern int sys_ioctl(), sys_setgroups();
277 AFS_STATCNT(afs_unmount);
278 #ifdef AFS_DISCON_ENV
281 if (!afs_globalVFS) {
282 printf("afs already unmounted\n");
286 AFS_RELE(AFSTOV(afs_globalVp));
289 vflush(afsp, NULLVP, 0); /* don't support forced */
290 afsp->mnt_data = NULL;
293 afs_cold_shutdown = 1;
294 afs_shutdown(); /* XXX */
297 /* give up syscall entries for ioctl & setgroups, which we've stolen */
298 sysent[SYS_ioctl].sy_call = sys_ioctl;
299 sysent[SYS_setgroups].sy_call = sys_setgroups;
301 /* give up the stolen syscall entry */
302 sysent[AFS_SYSCALL].sy_narg = 0;
303 sysent[AFS_SYSCALL].sy_argsize = 0;
304 sysent[AFS_SYSCALL].sy_call = afs_badcall;
306 ("AFS unmounted--use `/sbin/modunload -i %d' to unload before restarting AFS\n",
312 afs_badcall(struct proc *p, void *xx, register_t * yy)
318 afs_nbsd_getnewvnode(struct vcache *tvc)
320 while (getnewvnode(VT_AFS, afs_globalVFS, afs_vnodeop_p, &tvc->v)) {
321 /* no vnodes available, force an alloc (limits be damned)! */
324 tvc->v->v_data = (void *)tvc;
328 afs_root(struct mount *mp, struct vnode **vpp)
330 struct vrequest treq;
334 AFS_STATCNT(afs_root);
337 if (!(code = afs_InitReq(&treq, osi_curcred()))
338 && !(code = afs_CheckInit())) {
339 tvp = afs_GetVCache(&afs_rootFid, &treq, NULL, NULL);
341 /* There is really no reason to over-hold this bugger--it's held
342 * by the root filesystem reference. */
343 if (afs_globalVp != tvp) {
344 #ifdef AFS_DONT_OVERHOLD_GLOBALVP
346 AFS_RELE(AFSTOV(afs_globalVp));
349 AFS_HOLD(AFSTOV(afs_globalVp));
351 AFSTOV(tvp)->v_flag |= VROOT;
360 vn_lock(*vpp, LK_EXCLUSIVE | LK_RETRY, curproc); /* return it locked */
365 afs_statfs(struct osi_vfs *afsp, struct statfs *abp)
367 AFS_STATCNT(afs_statfs);
368 abp->f_bsize = afsp->osi_vfs_bsize;
371 * Fake a high number below to satisfy programs that use the ustat (for
372 * * AIX), or statfs (for the rest) call to make sure that there's
373 * enough * space in the device partition before storing something there
376 abp->f_blocks = abp->f_bfree = abp->f_bavail = abp->f_files =
377 abp->f_ffree = 9000000;
378 abp->f_fsid.val[0] = AFS_VFSMAGIC; /* magic */
379 abp->f_fsid.val[1] = (int)AFS_VFSFSID;
384 afs_sync(struct osi_vfs *afsp)
386 AFS_STATCNT(afs_sync);
387 #if defined(AFS_DISCON_ENV) && !defined(AFS_OBSD_ENV)
388 /* Can't do this in OpenBSD 2.7, it faults when called from apm_suspend() */
389 store_dirty_vcaches();
395 afs_nbsd_ref(struct vnode *vp)
397 if (vp->v_usecount == 0) {
398 vprint("holding unheld node", vp);
405 afs_nbsd_rele(struct vnode *vp)
407 if (vp->v_usecount <= 0) {
408 vprint("rele'ing unheld node", vp);
421 if (vp->v_usecount < 0) {
422 vprint("bad usecount", vp);
425 error = vget(vp, lfl, curproc);
427 insmntque(vp, afs_globalVFS); /* take off free list */
431 extern struct vfsops afs_vfsops;
432 extern struct vnodeopv_desc afs_vnodeop_opv_desc;
434 static struct vfsconf afs_vfsconf = {
444 MOD_VFS("afs", 0, &afs_vfsconf);
446 static char afsgenmem[] = "afsgenmem";
447 static char afsfidmem[] = "afsfidmem";
448 static char afsbhdrmem[] = "afsbhdrmem";
449 static char afsbfrmem[] = "afsbfrmem";
454 old_sysent = sysent[AFS_SYSCALL];
456 sysent[AFS_SYSCALL].sy_call = afs3_syscall;
457 sysent[AFS_SYSCALL].sy_narg = 6;
458 sysent[AFS_SYSCALL].sy_argsize = 6 * sizeof(long);
459 sysent[54].sy_call = afs_xioctl;
460 sysent[80].sy_call = Afs_xsetgroups;
467 afs_vfs_load(struct lkm_table *lkmtp, int cmd)
469 extern char *memname[];
471 vfs_opv_init_explicit(&afs_vnodeop_opv_desc);
472 vfs_opv_init_default(&afs_vnodeop_opv_desc);
473 if (memname[M_AFSGENERIC] == NULL)
474 memname[M_AFSGENERIC] = afsgenmem;
475 if (memname[M_AFSFID] == NULL)
476 memname[M_AFSFID] = afsfidmem;
477 if (memname[M_AFSBUFHDR] == NULL)
478 memname[M_AFSBUFHDR] = afsbhdrmem;
479 if (memname[M_AFSBUFFER] == NULL)
480 memname[M_AFSBUFFER] = afsbfrmem;
482 printf("OpenAFS ($Revision$) lkm loaded\n");
487 afs_vfs_unload(struct lkm_table *lktmp, int cmd)
489 extern char *memname[];
493 if (sysent[SYS_ioctl].sy_call != sys_ioctl)
496 if (memname[M_AFSGENERIC] == afsgenmem)
497 memname[M_AFSGENERIC] = NULL;
498 if (memname[M_AFSFID] == afsfidmem)
499 memname[M_AFSFID] = NULL;
500 if (memname[M_AFSBUFHDR] == afsbhdrmem)
501 memname[M_AFSBUFHDR] = NULL;
502 if (memname[M_AFSBUFFER] == afsbfrmem)
503 memname[M_AFSBUFFER] = NULL;
505 sysent[AFS_SYSCALL] = old_sysent;
506 printf("OpenAFS unloaded\n");
511 libafs_lkmentry(struct lkm_table *lkmtp, int cmd, int ver)
513 if (cmd == LKM_E_LOAD) {
514 if (strcmp(ostype, afs_NetBSD_osname)) {
515 printf("This is %s version %s\n", ostype, osrelease);
516 printf("This version of AFS is only for %s\n", afs_NetBSD_osname);
517 return EPROGMISMATCH;
519 if (sysent[AFS_SYSCALL].sy_call == afs3_syscall
520 || sysent[AFS_SYSCALL].sy_call == afs_badcall) {
521 printf("AFS already loaded\n");
525 DISPATCH(lkmtp, cmd, ver, afs_vfs_load, afs_vfs_unload, lkm_nofunc);