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 the OpenAFS 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
61 * The Regents of the University of California. All rights reserved.
63 * Redistribution and use in source and binary forms, with or without
64 * modification, are permitted provided that the following conditions
66 * 1. Redistributions of source code must retain the above copyright
67 * notice, this list of conditions and the following disclaimer.
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in the
70 * documentation and/or other materials provided with the distribution.
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.
75 * 4. Neither the name of the University nor the names of its contributors
76 * may be used to endorse or promote products derived from this software
77 * without specific prior written permission.
79 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
80 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
81 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
82 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
83 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
84 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
85 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
86 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
87 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
88 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
93 #include <afsconfig.h>
94 #include "afs/param.h"
97 #include "afs/sysincludes.h" /* Standard vendor system headers */
98 #include "afs/afsincludes.h" /* Afs-based standard headers */
99 #include "afs/afs_stats.h" /* statistics */
101 #include <sys/conf.h>
102 #include <sys/exec.h>
104 #include <sys/namei.h>
105 #include <sys/syscall.h>
106 #include <sys/syscallargs.h>
108 /* from /usr/src/sys/kern/vfs_subr.c */
109 extern void insmntque(struct vnode *, struct mount *);
111 extern int sys_lkmnosys(), afs_xioctl(), Afs_xsetgroups();
113 static int lkmid = -1;
114 static int afs_badcall(struct proc *p, void *xx, register_t * yy);
115 static struct sysent old_sysent;
117 struct osi_vfs *afs_globalVFS;
118 struct vcache *afs_globalVp;
134 struct vfsops afs_vfsops = {
151 afs_obsd_lookupname(char *fnamep, enum uio_seg segflg, int followlink,
152 struct vnode **compvpp)
159 * Lookup pathname "fnamep", returning leaf in *compvpp. segflg says
160 * whether the pathname is user or system space.
163 niflag = followlink ? FOLLOW : NOFOLLOW;
164 NDINIT(&nd, LOOKUP, niflag, segflg, fnamep, osi_curproc());
165 if ((error = namei(&nd)))
190 afs_fhtovp(mp, fhp, vpp)
209 afs_start(mp, flags, p)
214 return (0); /* nothing to do. ? */
218 afs_mount(mp, path, data, ndp, p)
222 struct nameidata *ndp;
225 /* ndp contains the mounted-from device. Just ignore it.
226 * we also don't care about our proc struct. */
229 if (mp->mnt_flag & MNT_UPDATE)
233 /* Don't allow remounts */
237 AFS_STATCNT(afs_mount);
240 /* initialize the vcache entries before we start using them */
242 /* XXX find a better place for this if possible */
244 mp->osi_vfs_bsize = 8192;
245 mp->osi_vfs_fsid.val[0] = AFS_VFSMAGIC; /* magic */
246 mp->osi_vfs_fsid.val[1] = (int)AFS_VFSFSID;
248 (void)copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
249 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
250 bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
251 strcpy(mp->mnt_stat.f_mntfromname, "AFS");
252 /* null terminated string "AFS" will fit, just leave it be. */
253 strcpy(mp->mnt_stat.f_fstypename, MOUNT_AFS);
255 (void)afs_statfs(mp, &mp->mnt_stat);
261 afs_unmount(afsp, flags, p)
266 extern int sys_ioctl(), sys_setgroups();
270 for (vp = LIST_FIRST(&afsp->mnt_vnodelist); vp != NULL;
271 vp = LIST_NEXT(vp, v_mntvnodes)) {
272 if (vp->v_usecount) return EBUSY;
275 AFS_STATCNT(afs_unmount);
276 if (afs_globalVFS == NULL) {
277 printf("afs already unmounted\n");
281 vrele(AFSTOV(afs_globalVp));
284 vflush(afsp, NULLVP, 0); /* don't support forced */
285 afsp->mnt_data = NULL;
288 afs_cold_shutdown = 1;
289 afs_shutdown(); /* XXX */
292 /* give up syscall entries for ioctl & setgroups, which we've stolen */
293 sysent[SYS_ioctl].sy_call = sys_ioctl;
294 sysent[SYS_setgroups].sy_call = sys_setgroups;
296 /* give up the stolen syscall entry */
297 sysent[AFS_SYSCALL].sy_narg = 0;
298 sysent[AFS_SYSCALL].sy_argsize = 0;
299 sysent[AFS_SYSCALL].sy_call = afs_badcall;
301 ("AFS unmounted--use `/sbin/modunload -i %d' to unload before restarting AFS\n",
307 afs_badcall(struct proc *p, void *xx, register_t * yy)
313 afs_obsd_getnewvnode(struct vcache *tvc)
315 while (getnewvnode(VT_AFS, afs_globalVFS, afs_vnodeop_p, &tvc->v)) {
316 /* no vnodes available, force an alloc (limits be damned)! */
319 tvc->v->v_data = (void *)tvc;
323 afs_root(struct mount *mp, struct vnode **vpp)
325 struct vrequest treq;
329 AFS_STATCNT(afs_root);
332 if (!(code = afs_InitReq(&treq, osi_curcred()))
333 && !(code = afs_CheckInit())) {
334 tvp = afs_GetVCache(&afs_rootFid, &treq, NULL, NULL);
336 /* There is really no reason to over-hold this bugger--it's held
337 * by the root filesystem reference. */
338 if (afs_globalVp != tvp) {
339 #ifdef AFS_DONT_OVERHOLD_GLOBALVP
341 AFS_RELE(AFSTOV(afs_globalVp));
344 vref(AFSTOV(afs_globalVp));
346 AFSTOV(tvp)->v_flag |= VROOT;
355 vn_lock(*vpp, LK_EXCLUSIVE | LK_RETRY, curproc); /* return it locked */
360 afs_statfs(struct osi_vfs *afsp, struct statfs *abp)
362 AFS_STATCNT(afs_statfs);
363 abp->f_bsize = afsp->osi_vfs_bsize;
366 * Fake a high number below to satisfy programs that use the ustat (for
367 * * AIX), or statfs (for the rest) call to make sure that there's
368 * enough * space in the device partition before storing something there
371 abp->f_blocks = abp->f_bfree = abp->f_bavail = abp->f_files =
372 abp->f_ffree = 9000000;
373 abp->f_fsid.val[0] = AFS_VFSMAGIC; /* magic */
374 abp->f_fsid.val[1] = (int)AFS_VFSFSID;
379 afs_sync(struct osi_vfs *afsp)
381 AFS_STATCNT(afs_sync);
392 if (vp->v_usecount < 0) {
393 vprint("bad usecount", vp);
396 error = vget(vp, lfl, curproc);
397 if (!error && vp->v_usecount == 1) {
398 /* vget() took it off the freelist; put it on our mount queue */
399 insmntque(vp, afs_globalVFS);
404 extern struct vfsops afs_vfsops;
405 extern struct vnodeopv_desc afs_vnodeop_opv_desc;
407 static struct vfsconf afs_vfsconf = {
417 MOD_VFS("afs", 0, &afs_vfsconf);
419 static char afsgenmem[] = "afsgenmem";
420 static char afsfidmem[] = "afsfidmem";
421 static char afsbhdrmem[] = "afsbhdrmem";
422 static char afsbfrmem[] = "afsbfrmem";
427 old_sysent = sysent[AFS_SYSCALL];
429 sysent[AFS_SYSCALL].sy_call = afs3_syscall;
430 sysent[AFS_SYSCALL].sy_narg = 6;
431 sysent[AFS_SYSCALL].sy_argsize = 6 * sizeof(long);
432 sysent[SYS_ioctl].sy_call = afs_xioctl;
433 sysent[SYS_setgroups].sy_call = Afs_xsetgroups;
440 afs_vfs_load(struct lkm_table *lkmtp, int cmd)
442 extern char *memname[];
444 vfs_opv_init_explicit(&afs_vnodeop_opv_desc);
445 vfs_opv_init_default(&afs_vnodeop_opv_desc);
446 if (memname[M_AFSGENERIC] == NULL)
447 memname[M_AFSGENERIC] = afsgenmem;
448 if (memname[M_AFSFID] == NULL)
449 memname[M_AFSFID] = afsfidmem;
450 if (memname[M_AFSBUFHDR] == NULL)
451 memname[M_AFSBUFHDR] = afsbhdrmem;
452 if (memname[M_AFSBUFFER] == NULL)
453 memname[M_AFSBUFFER] = afsbfrmem;
455 printf("OpenAFS ($Revision$) lkm loaded\n");
460 afs_vfs_unload(struct lkm_table *lktmp, int cmd)
462 extern char *memname[];
466 if (sysent[SYS_ioctl].sy_call != sys_ioctl)
469 if (memname[M_AFSGENERIC] == afsgenmem)
470 memname[M_AFSGENERIC] = NULL;
471 if (memname[M_AFSFID] == afsfidmem)
472 memname[M_AFSFID] = NULL;
473 if (memname[M_AFSBUFHDR] == afsbhdrmem)
474 memname[M_AFSBUFHDR] = NULL;
475 if (memname[M_AFSBUFFER] == afsbfrmem)
476 memname[M_AFSBUFFER] = NULL;
478 sysent[AFS_SYSCALL] = old_sysent;
479 printf("OpenAFS unloaded\n");
484 libafs_lkmentry(struct lkm_table *lkmtp, int cmd, int ver)
486 if (cmd == LKM_E_LOAD) {
487 if (sysent[AFS_SYSCALL].sy_call == afs3_syscall
488 || sysent[AFS_SYSCALL].sy_call == afs_badcall) {
489 printf("AFS already loaded\n");
493 DISPATCH(lkmtp, cmd, ver, afs_vfs_load, afs_vfs_unload, lkm_nofunc);