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
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19 without specific, written prior authorization. if the
20 above copyright notice or any other identification of the
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25 this software is provided as is, without representation
26 from the university of michigan as to its fitness for any
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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
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73 * This product includes software developed by the University of
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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)
219 register struct mount *mp;
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 */
243 init_vcache_entries();
245 mp->osi_vfs_bsize = 8192;
246 mp->osi_vfs_fsid.val[0] = AFS_VFSMAGIC; /* magic */
247 mp->osi_vfs_fsid.val[1] = (int)AFS_VFSFSID;
249 (void)copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
250 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
251 bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
252 strcpy(mp->mnt_stat.f_mntfromname, "AFS");
253 /* null terminated string "AFS" will fit, just leave it be. */
254 strcpy(mp->mnt_stat.f_fstypename, MOUNT_AFS);
256 (void)afs_statfs(mp, &mp->mnt_stat);
262 afs_unmount(afsp, flags, p)
267 extern int sys_ioctl(), sys_setgroups();
271 for (vp = LIST_FIRST(&afsp->mnt_vnodelist); vp != NULL;
272 vp = LIST_NEXT(vp, v_mntvnodes)) {
273 if (vp->v_usecount) return EBUSY;
276 AFS_STATCNT(afs_unmount);
278 if (afs_globalVFS == NULL) {
279 printf("afs already unmounted\n");
283 vrele(AFSTOV(afs_globalVp));
286 vflush(afsp, NULLVP, 0); /* don't support forced */
287 afsp->mnt_data = NULL;
290 afs_cold_shutdown = 1;
291 afs_shutdown(); /* XXX */
294 /* give up syscall entries for ioctl & setgroups, which we've stolen */
295 sysent[SYS_ioctl].sy_call = sys_ioctl;
296 sysent[SYS_setgroups].sy_call = sys_setgroups;
298 /* give up the stolen syscall entry */
299 sysent[AFS_SYSCALL].sy_narg = 0;
300 sysent[AFS_SYSCALL].sy_argsize = 0;
301 sysent[AFS_SYSCALL].sy_call = afs_badcall;
303 ("AFS unmounted--use `/sbin/modunload -i %d' to unload before restarting AFS\n",
309 afs_badcall(struct proc *p, void *xx, register_t * yy)
315 afs_obsd_getnewvnode(struct vcache *tvc)
317 while (getnewvnode(VT_AFS, afs_globalVFS, afs_vnodeop_p, &tvc->v)) {
318 /* no vnodes available, force an alloc (limits be damned)! */
321 tvc->v->v_data = (void *)tvc;
325 afs_root(struct mount *mp, struct vnode **vpp)
327 struct vrequest treq;
331 AFS_STATCNT(afs_root);
334 if (!(code = afs_InitReq(&treq, osi_curcred()))
335 && !(code = afs_CheckInit())) {
336 tvp = afs_GetVCache(&afs_rootFid, &treq, NULL, NULL);
338 /* There is really no reason to over-hold this bugger--it's held
339 * by the root filesystem reference. */
340 if (afs_globalVp != tvp) {
341 #ifdef AFS_DONT_OVERHOLD_GLOBALVP
343 AFS_RELE(AFSTOV(afs_globalVp));
346 vref(AFSTOV(afs_globalVp));
348 AFSTOV(tvp)->v_flag |= VROOT;
357 vn_lock(*vpp, LK_EXCLUSIVE | LK_RETRY, curproc); /* return it locked */
362 afs_statfs(struct osi_vfs *afsp, struct statfs *abp)
364 AFS_STATCNT(afs_statfs);
365 abp->f_bsize = afsp->osi_vfs_bsize;
368 * Fake a high number below to satisfy programs that use the ustat (for
369 * * AIX), or statfs (for the rest) call to make sure that there's
370 * enough * space in the device partition before storing something there
373 abp->f_blocks = abp->f_bfree = abp->f_bavail = abp->f_files =
374 abp->f_ffree = 9000000;
375 abp->f_fsid.val[0] = AFS_VFSMAGIC; /* magic */
376 abp->f_fsid.val[1] = (int)AFS_VFSFSID;
381 afs_sync(struct osi_vfs *afsp)
383 AFS_STATCNT(afs_sync);
384 #if !defined(AFS_OBSD27_ENV)
385 /* Can't do this in OpenBSD 2.7, it faults when called from apm_suspend() */
386 store_dirty_vcaches();
398 if (vp->v_usecount < 0) {
399 vprint("bad usecount", vp);
402 error = vget(vp, lfl, curproc);
403 if (!error && vp->v_usecount == 1) {
404 /* vget() took it off the freelist; put it on our mount queue */
405 insmntque(vp, afs_globalVFS);
410 extern struct vfsops afs_vfsops;
411 extern struct vnodeopv_desc afs_vnodeop_opv_desc;
413 static struct vfsconf afs_vfsconf = {
423 MOD_VFS("afs", 0, &afs_vfsconf);
425 static char afsgenmem[] = "afsgenmem";
426 static char afsfidmem[] = "afsfidmem";
427 static char afsbhdrmem[] = "afsbhdrmem";
428 static char afsbfrmem[] = "afsbfrmem";
433 old_sysent = sysent[AFS_SYSCALL];
435 sysent[AFS_SYSCALL].sy_call = afs3_syscall;
436 sysent[AFS_SYSCALL].sy_narg = 6;
437 sysent[AFS_SYSCALL].sy_argsize = 6 * sizeof(long);
438 sysent[SYS_ioctl].sy_call = afs_xioctl;
439 sysent[SYS_setgroups].sy_call = Afs_xsetgroups;
446 afs_vfs_load(struct lkm_table *lkmtp, int cmd)
448 extern char *memname[];
450 vfs_opv_init_explicit(&afs_vnodeop_opv_desc);
451 vfs_opv_init_default(&afs_vnodeop_opv_desc);
452 if (memname[M_AFSGENERIC] == NULL)
453 memname[M_AFSGENERIC] = afsgenmem;
454 if (memname[M_AFSFID] == NULL)
455 memname[M_AFSFID] = afsfidmem;
456 if (memname[M_AFSBUFHDR] == NULL)
457 memname[M_AFSBUFHDR] = afsbhdrmem;
458 if (memname[M_AFSBUFFER] == NULL)
459 memname[M_AFSBUFFER] = afsbfrmem;
461 printf("OpenAFS ($Revision$) lkm loaded\n");
466 afs_vfs_unload(struct lkm_table *lktmp, int cmd)
468 extern char *memname[];
472 if (sysent[SYS_ioctl].sy_call != sys_ioctl)
475 if (memname[M_AFSGENERIC] == afsgenmem)
476 memname[M_AFSGENERIC] = NULL;
477 if (memname[M_AFSFID] == afsfidmem)
478 memname[M_AFSFID] = NULL;
479 if (memname[M_AFSBUFHDR] == afsbhdrmem)
480 memname[M_AFSBUFHDR] = NULL;
481 if (memname[M_AFSBUFFER] == afsbfrmem)
482 memname[M_AFSBUFFER] = NULL;
484 sysent[AFS_SYSCALL] = old_sysent;
485 printf("OpenAFS unloaded\n");
490 libafs_lkmentry(struct lkm_table *lkmtp, int cmd, int ver)
492 if (cmd == LKM_E_LOAD) {
493 if (sysent[AFS_SYSCALL].sy_call == afs3_syscall
494 || sysent[AFS_SYSCALL].sy_call == afs_badcall) {
495 printf("AFS already loaded\n");
499 DISPATCH(lkmtp, cmd, ver, afs_vfs_load, afs_vfs_unload, lkm_nofunc);