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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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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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(), afs3_syscall(), 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_nbsd_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 #ifdef AFS_DISCON_ENV
241 /* initialize the vcache entries before we start using them */
243 /* XXX find a better place for this if possible */
244 init_vcache_entries();
247 mp->osi_vfs_bsize = 8192;
248 mp->osi_vfs_fsid.val[0] = AFS_VFSMAGIC; /* magic */
249 mp->osi_vfs_fsid.val[1] = (int)AFS_VFSFSID;
251 (void)copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
252 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
253 bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
254 strcpy(mp->mnt_stat.f_mntfromname, "AFS");
255 /* null terminated string "AFS" will fit, just leave it be. */
256 strcpy(mp->mnt_stat.f_fstypename, MOUNT_AFS);
258 (void)afs_statfs(mp, &mp->mnt_stat);
264 afs_unmount(afsp, flags, p)
269 extern int sys_ioctl(), sys_setgroups();
271 AFS_STATCNT(afs_unmount);
272 #ifdef AFS_DISCON_ENV
275 if (afs_globalVFS == NULL) {
276 printf("afs already unmounted\n");
280 vrele(AFSTOV(afs_globalVp));
283 vflush(afsp, NULLVP, 0); /* don't support forced */
284 afsp->mnt_data = NULL;
287 afs_cold_shutdown = 1;
288 afs_shutdown(); /* XXX */
291 /* give up syscall entries for ioctl & setgroups, which we've stolen */
292 sysent[SYS_ioctl].sy_call = sys_ioctl;
293 sysent[SYS_setgroups].sy_call = sys_setgroups;
295 /* give up the stolen syscall entry */
296 sysent[AFS_SYSCALL].sy_narg = 0;
297 sysent[AFS_SYSCALL].sy_argsize = 0;
298 sysent[AFS_SYSCALL].sy_call = afs_badcall;
300 ("AFS unmounted--use `/sbin/modunload -i %d' to unload before restarting AFS\n",
306 afs_badcall(struct proc *p, void *xx, register_t * yy)
312 afs_nbsd_getnewvnode(struct vcache *tvc)
314 while (getnewvnode(VT_AFS, afs_globalVFS, afs_vnodeop_p, &tvc->v)) {
315 /* no vnodes available, force an alloc (limits be damned)! */
318 tvc->v->v_data = (void *)tvc;
322 afs_root(struct mount *mp, struct vnode **vpp)
324 struct vrequest treq;
328 AFS_STATCNT(afs_root);
331 if (!(code = afs_InitReq(&treq, osi_curcred()))
332 && !(code = afs_CheckInit())) {
333 tvp = afs_GetVCache(&afs_rootFid, &treq, NULL, NULL);
335 /* There is really no reason to over-hold this bugger--it's held
336 * by the root filesystem reference. */
337 if (afs_globalVp != tvp) {
338 #ifdef AFS_DONT_OVERHOLD_GLOBALVP
340 AFS_RELE(AFSTOV(afs_globalVp));
343 VREF(AFSTOV(afs_globalVp));
345 AFSTOV(tvp)->v_flag |= VROOT;
354 vn_lock(*vpp, LK_EXCLUSIVE | LK_RETRY, curproc); /* return it locked */
359 afs_statfs(struct osi_vfs *afsp, struct statfs *abp)
361 AFS_STATCNT(afs_statfs);
362 abp->f_bsize = afsp->osi_vfs_bsize;
365 * Fake a high number below to satisfy programs that use the ustat (for
366 * * AIX), or statfs (for the rest) call to make sure that there's
367 * enough * space in the device partition before storing something there
370 abp->f_blocks = abp->f_bfree = abp->f_bavail = abp->f_files =
371 abp->f_ffree = 9000000;
372 abp->f_fsid.val[0] = AFS_VFSMAGIC; /* magic */
373 abp->f_fsid.val[1] = (int)AFS_VFSFSID;
378 afs_sync(struct osi_vfs *afsp)
380 AFS_STATCNT(afs_sync);
381 #if defined(AFS_DISCON_ENV) && !defined(AFS_OBSD_ENV)
382 /* Can't do this in OpenBSD 2.7, it faults when called from apm_suspend() */
383 store_dirty_vcaches();
395 if (vp->v_usecount < 0) {
396 vprint("bad usecount", vp);
399 error = vget(vp, lfl, curproc);
400 if (!error && vp->v_usecount == 1) {
401 /* vget() took it off the freelist; put it on our mount queue */
402 insmntque(vp, afs_globalVFS);
407 extern struct vfsops afs_vfsops;
408 extern struct vnodeopv_desc afs_vnodeop_opv_desc;
410 static struct vfsconf afs_vfsconf = {
420 MOD_VFS("afs", 0, &afs_vfsconf);
422 static char afsgenmem[] = "afsgenmem";
423 static char afsfidmem[] = "afsfidmem";
424 static char afsbhdrmem[] = "afsbhdrmem";
425 static char afsbfrmem[] = "afsbfrmem";
430 old_sysent = sysent[AFS_SYSCALL];
432 sysent[AFS_SYSCALL].sy_call = afs3_syscall;
433 sysent[AFS_SYSCALL].sy_narg = 6;
434 sysent[AFS_SYSCALL].sy_argsize = 6 * sizeof(long);
435 sysent[SYS_ioctl].sy_call = afs_xioctl;
436 sysent[SYS_setgroups].sy_call = Afs_xsetgroups;
443 afs_vfs_load(struct lkm_table *lkmtp, int cmd)
445 extern char *memname[];
447 vfs_opv_init_explicit(&afs_vnodeop_opv_desc);
448 vfs_opv_init_default(&afs_vnodeop_opv_desc);
449 if (memname[M_AFSGENERIC] == NULL)
450 memname[M_AFSGENERIC] = afsgenmem;
451 if (memname[M_AFSFID] == NULL)
452 memname[M_AFSFID] = afsfidmem;
453 if (memname[M_AFSBUFHDR] == NULL)
454 memname[M_AFSBUFHDR] = afsbhdrmem;
455 if (memname[M_AFSBUFFER] == NULL)
456 memname[M_AFSBUFFER] = afsbfrmem;
458 printf("OpenAFS ($Revision$) lkm loaded\n");
463 afs_vfs_unload(struct lkm_table *lktmp, int cmd)
465 extern char *memname[];
469 if (sysent[SYS_ioctl].sy_call != sys_ioctl)
472 if (memname[M_AFSGENERIC] == afsgenmem)
473 memname[M_AFSGENERIC] = NULL;
474 if (memname[M_AFSFID] == afsfidmem)
475 memname[M_AFSFID] = NULL;
476 if (memname[M_AFSBUFHDR] == afsbhdrmem)
477 memname[M_AFSBUFHDR] = NULL;
478 if (memname[M_AFSBUFFER] == afsbfrmem)
479 memname[M_AFSBUFFER] = NULL;
481 sysent[AFS_SYSCALL] = old_sysent;
482 printf("OpenAFS unloaded\n");
487 libafs_lkmentry(struct lkm_table *lkmtp, int cmd, int ver)
489 if (cmd == LKM_E_LOAD) {
490 if (sysent[AFS_SYSCALL].sy_call == afs3_syscall
491 || sysent[AFS_SYSCALL].sy_call == afs_badcall) {
492 printf("AFS already loaded\n");
496 DISPATCH(lkmtp, cmd, ver, afs_vfs_load, afs_vfs_unload, lkm_nofunc);