xref: /freebsd/sys/fs/smbfs/smbfs_vnops.c (revision 907b59d76938e654f0d040a888e8dfca3de1e222)
1 /*-
2  * Copyright (c) 2000-2001 Boris Popov
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  * $FreeBSD$
27  */
28 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/namei.h>
31 #include <sys/kernel.h>
32 #include <sys/proc.h>
33 #include <sys/bio.h>
34 #include <sys/buf.h>
35 #include <sys/fcntl.h>
36 #include <sys/mount.h>
37 #include <sys/unistd.h>
38 #include <sys/vnode.h>
39 #include <sys/limits.h>
40 #include <sys/lockf.h>
41 #include <sys/stat.h>
42 
43 #include <vm/vm.h>
44 #include <vm/vm_extern.h>
45 
46 
47 #include <netsmb/smb.h>
48 #include <netsmb/smb_conn.h>
49 #include <netsmb/smb_subr.h>
50 
51 #include <fs/smbfs/smbfs.h>
52 #include <fs/smbfs/smbfs_node.h>
53 #include <fs/smbfs/smbfs_subr.h>
54 
55 /*
56  * Prototypes for SMBFS vnode operations
57  */
58 static vop_create_t	smbfs_create;
59 static vop_mknod_t	smbfs_mknod;
60 static vop_open_t	smbfs_open;
61 static vop_close_t	smbfs_close;
62 static vop_access_t	smbfs_access;
63 static vop_getattr_t	smbfs_getattr;
64 static vop_setattr_t	smbfs_setattr;
65 static vop_read_t	smbfs_read;
66 static vop_write_t	smbfs_write;
67 static vop_fsync_t	smbfs_fsync;
68 static vop_remove_t	smbfs_remove;
69 static vop_link_t	smbfs_link;
70 static vop_lookup_t	smbfs_lookup;
71 static vop_rename_t	smbfs_rename;
72 static vop_mkdir_t	smbfs_mkdir;
73 static vop_rmdir_t	smbfs_rmdir;
74 static vop_symlink_t	smbfs_symlink;
75 static vop_readdir_t	smbfs_readdir;
76 static vop_strategy_t	smbfs_strategy;
77 static vop_print_t	smbfs_print;
78 static vop_pathconf_t	smbfs_pathconf;
79 static vop_advlock_t	smbfs_advlock;
80 static vop_getextattr_t	smbfs_getextattr;
81 
82 struct vop_vector smbfs_vnodeops = {
83 	.vop_default =		&default_vnodeops,
84 
85 	.vop_access =		smbfs_access,
86 	.vop_advlock =		smbfs_advlock,
87 	.vop_close =		smbfs_close,
88 	.vop_create =		smbfs_create,
89 	.vop_fsync =		smbfs_fsync,
90 	.vop_getattr =		smbfs_getattr,
91 	.vop_getextattr = 	smbfs_getextattr,
92 	.vop_getpages =		smbfs_getpages,
93 	.vop_inactive =		smbfs_inactive,
94 	.vop_ioctl =		smbfs_ioctl,
95 	.vop_link =		smbfs_link,
96 	.vop_lookup =		smbfs_lookup,
97 	.vop_mkdir =		smbfs_mkdir,
98 	.vop_mknod =		smbfs_mknod,
99 	.vop_open =		smbfs_open,
100 	.vop_pathconf =		smbfs_pathconf,
101 	.vop_print =		smbfs_print,
102 	.vop_putpages =		smbfs_putpages,
103 	.vop_read =		smbfs_read,
104 	.vop_readdir =		smbfs_readdir,
105 	.vop_reclaim =		smbfs_reclaim,
106 	.vop_remove =		smbfs_remove,
107 	.vop_rename =		smbfs_rename,
108 	.vop_rmdir =		smbfs_rmdir,
109 	.vop_setattr =		smbfs_setattr,
110 /*	.vop_setextattr =	smbfs_setextattr,*/
111 	.vop_strategy =		smbfs_strategy,
112 	.vop_symlink =		smbfs_symlink,
113 	.vop_write =		smbfs_write,
114 };
115 
116 static int
117 smbfs_access(ap)
118 	struct vop_access_args /* {
119 		struct vnode *a_vp;
120 		accmode_t a_accmode;
121 		struct ucred *a_cred;
122 		struct thread *a_td;
123 	} */ *ap;
124 {
125 	struct vnode *vp = ap->a_vp;
126 	accmode_t accmode = ap->a_accmode;
127 	mode_t mpmode;
128 	struct smbmount *smp = VTOSMBFS(vp);
129 
130 	SMBVDEBUG("\n");
131 	if ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
132 		switch (vp->v_type) {
133 		    case VREG: case VDIR: case VLNK:
134 			return EROFS;
135 		    default:
136 			break;
137 		}
138 	}
139 	mpmode = vp->v_type == VREG ? smp->sm_file_mode : smp->sm_dir_mode;
140 	return (vaccess(vp->v_type, mpmode, smp->sm_uid,
141 	    smp->sm_gid, ap->a_accmode, ap->a_cred, NULL));
142 }
143 
144 /* ARGSUSED */
145 static int
146 smbfs_open(ap)
147 	struct vop_open_args /* {
148 		struct vnode *a_vp;
149 		int  a_mode;
150 		struct ucred *a_cred;
151 		struct thread *a_td;
152 	} */ *ap;
153 {
154 	struct vnode *vp = ap->a_vp;
155 	struct smbnode *np = VTOSMB(vp);
156 	struct smb_cred *scred;
157 	struct vattr vattr;
158 	int mode = ap->a_mode;
159 	int error, accmode;
160 
161 	SMBVDEBUG("%s,%d\n", np->n_name, (np->n_flag & NOPEN) != 0);
162 	if (vp->v_type != VREG && vp->v_type != VDIR) {
163 		SMBFSERR("open eacces vtype=%d\n", vp->v_type);
164 		return EACCES;
165 	}
166 	if (vp->v_type == VDIR) {
167 		np->n_flag |= NOPEN;
168 		return 0;
169 	}
170 	if (np->n_flag & NMODIFIED) {
171 		if ((error = smbfs_vinvalbuf(vp, ap->a_td)) == EINTR)
172 			return error;
173 		smbfs_attr_cacheremove(vp);
174 		error = VOP_GETATTR(vp, &vattr, ap->a_cred);
175 		if (error)
176 			return error;
177 		np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
178 	} else {
179 		error = VOP_GETATTR(vp, &vattr, ap->a_cred);
180 		if (error)
181 			return error;
182 		if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) {
183 			error = smbfs_vinvalbuf(vp, ap->a_td);
184 			if (error == EINTR)
185 				return error;
186 			np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
187 		}
188 	}
189 	if ((np->n_flag & NOPEN) != 0)
190 		return 0;
191 	/*
192 	 * Use DENYNONE to give unixy semantics of permitting
193 	 * everything not forbidden by permissions.  Ie denial
194 	 * is up to server with clients/openers needing to use
195 	 * advisory locks for further control.
196 	 */
197 	accmode = SMB_SM_DENYNONE|SMB_AM_OPENREAD;
198 	if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
199 		accmode = SMB_SM_DENYNONE|SMB_AM_OPENRW;
200 	scred = smbfs_malloc_scred();
201 	smb_makescred(scred, ap->a_td, ap->a_cred);
202 	error = smbfs_smb_open(np, accmode, scred);
203 	if (error) {
204 		if (mode & FWRITE)
205 			return EACCES;
206 		else if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
207 			accmode = SMB_SM_DENYNONE|SMB_AM_OPENREAD;
208 			error = smbfs_smb_open(np, accmode, scred);
209 		}
210 	}
211 	if (error == 0) {
212 		np->n_flag |= NOPEN;
213 		vnode_create_vobject(ap->a_vp, vattr.va_size, ap->a_td);
214 	}
215 	smbfs_attr_cacheremove(vp);
216 	smbfs_free_scred(scred);
217 	return error;
218 }
219 
220 static int
221 smbfs_close(ap)
222 	struct vop_close_args /* {
223 		struct vnodeop_desc *a_desc;
224 		struct vnode *a_vp;
225 		int  a_fflag;
226 		struct ucred *a_cred;
227 		struct thread *a_td;
228 	} */ *ap;
229 {
230 	struct vnode *vp = ap->a_vp;
231 	struct thread *td = ap->a_td;
232 	struct smbnode *np = VTOSMB(vp);
233 	struct smb_cred *scred;
234 
235 	if (vp->v_type == VDIR && (np->n_flag & NOPEN) != 0 &&
236 	    np->n_dirseq != NULL) {
237 		scred = smbfs_malloc_scred();
238 		smb_makescred(scred, td, ap->a_cred);
239 		smbfs_findclose(np->n_dirseq, scred);
240 		smbfs_free_scred(scred);
241 		np->n_dirseq = NULL;
242 	}
243 	return 0;
244 }
245 
246 /*
247  * smbfs_getattr call from vfs.
248  */
249 static int
250 smbfs_getattr(ap)
251 	struct vop_getattr_args /* {
252 		struct vnode *a_vp;
253 		struct vattr *a_vap;
254 		struct ucred *a_cred;
255 	} */ *ap;
256 {
257 	struct vnode *vp = ap->a_vp;
258 	struct smbnode *np = VTOSMB(vp);
259 	struct vattr *va=ap->a_vap;
260 	struct smbfattr fattr;
261 	struct smb_cred *scred;
262 	u_quad_t oldsize;
263 	int error;
264 
265 	SMBVDEBUG("%lx: '%s' %d\n", (long)vp, np->n_name, (vp->v_vflag & VV_ROOT) != 0);
266 	error = smbfs_attr_cachelookup(vp, va);
267 	if (!error)
268 		return 0;
269 	SMBVDEBUG("not in the cache\n");
270 	scred = smbfs_malloc_scred();
271 	smb_makescred(scred, curthread, ap->a_cred);
272 	oldsize = np->n_size;
273 	error = smbfs_smb_lookup(np, NULL, 0, &fattr, scred);
274 	if (error) {
275 		SMBVDEBUG("error %d\n", error);
276 		smbfs_free_scred(scred);
277 		return error;
278 	}
279 	smbfs_attr_cacheenter(vp, &fattr);
280 	smbfs_attr_cachelookup(vp, va);
281 	if (np->n_flag & NOPEN)
282 		np->n_size = oldsize;
283 		smbfs_free_scred(scred);
284 	return 0;
285 }
286 
287 static int
288 smbfs_setattr(ap)
289 	struct vop_setattr_args /* {
290 		struct vnode *a_vp;
291 		struct vattr *a_vap;
292 		struct ucred *a_cred;
293 	} */ *ap;
294 {
295 	struct vnode *vp = ap->a_vp;
296 	struct smbnode *np = VTOSMB(vp);
297 	struct vattr *vap = ap->a_vap;
298 	struct timespec *mtime, *atime;
299 	struct smb_cred *scred;
300 	struct smb_share *ssp = np->n_mount->sm_share;
301 	struct smb_vc *vcp = SSTOVC(ssp);
302 	struct thread *td = curthread;
303 	u_quad_t tsize = 0;
304 	int isreadonly, doclose, error = 0;
305 	int old_n_dosattr;
306 
307 	SMBVDEBUG("\n");
308 	isreadonly = (vp->v_mount->mnt_flag & MNT_RDONLY);
309 	/*
310 	 * Disallow write attempts if the filesystem is mounted read-only.
311 	 */
312   	if ((vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL ||
313 	     vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL ||
314 	     vap->va_mode != (mode_t)VNOVAL || vap->va_flags != VNOVAL) &&
315 	     isreadonly)
316 		return EROFS;
317 
318 	/*
319 	 * We only support setting four flags.  Don't allow setting others.
320 	 *
321 	 * We map UF_READONLY to SMB_FA_RDONLY, unlike the MacOS X version
322 	 * of this code, which maps both UF_IMMUTABLE AND SF_IMMUTABLE to
323 	 * SMB_FA_RDONLY.  The immutable flags have different semantics
324 	 * than readonly, which is the reason for the difference.
325 	 */
326 	if (vap->va_flags != VNOVAL) {
327 		if (vap->va_flags & ~(UF_HIDDEN|UF_SYSTEM|UF_ARCHIVE|
328 				      UF_READONLY))
329 			return EINVAL;
330 	}
331 
332 	scred = smbfs_malloc_scred();
333 	smb_makescred(scred, td, ap->a_cred);
334 	if (vap->va_size != VNOVAL) {
335  		switch (vp->v_type) {
336  		    case VDIR:
337  			error = EISDIR;
338 			goto out;
339  		    case VREG:
340 			break;
341  		    default:
342 			error = EINVAL;
343 			goto out;
344   		}
345 		if (isreadonly) {
346 			error = EROFS;
347 			goto out;
348 		}
349 		doclose = 0;
350 		vnode_pager_setsize(vp, (u_long)vap->va_size);
351  		tsize = np->n_size;
352  		np->n_size = vap->va_size;
353 		if ((np->n_flag & NOPEN) == 0) {
354 			error = smbfs_smb_open(np,
355 					       SMB_SM_DENYNONE|SMB_AM_OPENRW,
356 					       scred);
357 			if (error == 0)
358 				doclose = 1;
359 		}
360 		if (error == 0)
361 			error = smbfs_smb_setfsize(np,
362 			    (int64_t)vap->va_size, scred);
363 		if (doclose)
364 			smbfs_smb_close(ssp, np->n_fid, NULL, scred);
365 		if (error) {
366 			np->n_size = tsize;
367 			vnode_pager_setsize(vp, (u_long)tsize);
368 			goto out;
369 		}
370   	}
371 	if ((vap->va_flags != VNOVAL) || (vap->va_mode != (mode_t)VNOVAL)) {
372 		old_n_dosattr = np->n_dosattr;
373 
374 		if (vap->va_mode != (mode_t)VNOVAL) {
375 			if (vap->va_mode & S_IWUSR)
376 				np->n_dosattr &= ~SMB_FA_RDONLY;
377 			else
378 				np->n_dosattr |= SMB_FA_RDONLY;
379 		}
380 
381 		if (vap->va_flags != VNOVAL) {
382 			if (vap->va_flags & UF_HIDDEN)
383 				np->n_dosattr |= SMB_FA_HIDDEN;
384 			else
385 				np->n_dosattr &= ~SMB_FA_HIDDEN;
386 
387 			if (vap->va_flags & UF_SYSTEM)
388 				np->n_dosattr |= SMB_FA_SYSTEM;
389 			else
390 				np->n_dosattr &= ~SMB_FA_SYSTEM;
391 
392 			if (vap->va_flags & UF_ARCHIVE)
393 				np->n_dosattr |= SMB_FA_ARCHIVE;
394 			else
395 				np->n_dosattr &= ~SMB_FA_ARCHIVE;
396 
397 			/*
398 			 * We only support setting the immutable / readonly
399 			 * bit for regular files.  According to comments in
400 			 * the MacOS X version of this code, supporting the
401 			 * readonly bit on directories doesn't do the same
402 			 * thing in Windows as in Unix.
403 			 */
404 			if (vp->v_type == VREG) {
405 				if (vap->va_flags & UF_READONLY)
406 					np->n_dosattr |= SMB_FA_RDONLY;
407 				else
408 					np->n_dosattr &= ~SMB_FA_RDONLY;
409 			}
410 		}
411 
412 		if (np->n_dosattr != old_n_dosattr) {
413 			error = smbfs_smb_setpattr(np, np->n_dosattr, NULL, scred);
414 			if (error)
415 				goto out;
416 		}
417 	}
418 	mtime = atime = NULL;
419 	if (vap->va_mtime.tv_sec != VNOVAL)
420 		mtime = &vap->va_mtime;
421 	if (vap->va_atime.tv_sec != VNOVAL)
422 		atime = &vap->va_atime;
423 	if (mtime != atime) {
424 		if (vap->va_vaflags & VA_UTIMES_NULL) {
425 			error = VOP_ACCESS(vp, VADMIN, ap->a_cred, td);
426 			if (error)
427 				error = VOP_ACCESS(vp, VWRITE, ap->a_cred, td);
428 		} else
429 			error = VOP_ACCESS(vp, VADMIN, ap->a_cred, td);
430 #if 0
431 		if (mtime == NULL)
432 			mtime = &np->n_mtime;
433 		if (atime == NULL)
434 			atime = &np->n_atime;
435 #endif
436 		/*
437 		 * If file is opened, then we can use handle based calls.
438 		 * If not, use path based ones.
439 		 */
440 		if ((np->n_flag & NOPEN) == 0) {
441 			if (vcp->vc_flags & SMBV_WIN95) {
442 				error = VOP_OPEN(vp, FWRITE, ap->a_cred, td,
443 				    NULL);
444 				if (!error) {
445 /*					error = smbfs_smb_setfattrNT(np, 0,
446 					    mtime, atime, scred);
447 					VOP_GETATTR(vp, &vattr, ap->a_cred); */
448 					if (mtime)
449 						np->n_mtime = *mtime;
450 					VOP_CLOSE(vp, FWRITE, ap->a_cred, td);
451 				}
452 			} else if ((vcp->vc_sopt.sv_caps & SMB_CAP_NT_SMBS)) {
453 				error = smbfs_smb_setptime2(np, mtime, atime, 0, scred);
454 /*				error = smbfs_smb_setpattrNT(np, 0, mtime, atime, scred);*/
455 			} else if (SMB_DIALECT(vcp) >= SMB_DIALECT_LANMAN2_0) {
456 				error = smbfs_smb_setptime2(np, mtime, atime, 0, scred);
457 			} else {
458 				error = smbfs_smb_setpattr(np, 0, mtime, scred);
459 			}
460 		} else {
461 			if (vcp->vc_sopt.sv_caps & SMB_CAP_NT_SMBS) {
462 				error = smbfs_smb_setfattrNT(np, 0, mtime, atime, scred);
463 			} else if (SMB_DIALECT(vcp) >= SMB_DIALECT_LANMAN1_0) {
464 				error = smbfs_smb_setftime(np, mtime, atime, scred);
465 			} else {
466 				/*
467 				 * I have no idea how to handle this for core
468 				 * level servers. The possible solution is to
469 				 * update mtime after file is closed.
470 				 */
471 				 SMBERROR("can't update times on an opened file\n");
472 			}
473 		}
474 	}
475 	/*
476 	 * Invalidate attribute cache in case if server doesn't set
477 	 * required attributes.
478 	 */
479 	smbfs_attr_cacheremove(vp);	/* invalidate cache */
480 	VOP_GETATTR(vp, vap, ap->a_cred);
481 	np->n_mtime.tv_sec = vap->va_mtime.tv_sec;
482 out:
483 	smbfs_free_scred(scred);
484 	return error;
485 }
486 /*
487  * smbfs_read call.
488  */
489 static int
490 smbfs_read(ap)
491 	struct vop_read_args /* {
492 		struct vnode *a_vp;
493 		struct uio *a_uio;
494 		int  a_ioflag;
495 		struct ucred *a_cred;
496 	} */ *ap;
497 {
498 	struct vnode *vp = ap->a_vp;
499 	struct uio *uio = ap->a_uio;
500 
501 	SMBVDEBUG("\n");
502 	if (vp->v_type != VREG && vp->v_type != VDIR)
503 		return EPERM;
504 	return smbfs_readvnode(vp, uio, ap->a_cred);
505 }
506 
507 static int
508 smbfs_write(ap)
509 	struct vop_write_args /* {
510 		struct vnode *a_vp;
511 		struct uio *a_uio;
512 		int  a_ioflag;
513 		struct ucred *a_cred;
514 	} */ *ap;
515 {
516 	struct vnode *vp = ap->a_vp;
517 	struct uio *uio = ap->a_uio;
518 
519 	SMBVDEBUG("%d,ofs=%jd,sz=%zd\n",vp->v_type, (intmax_t)uio->uio_offset,
520 	    uio->uio_resid);
521 	if (vp->v_type != VREG)
522 		return (EPERM);
523 	return smbfs_writevnode(vp, uio, ap->a_cred,ap->a_ioflag);
524 }
525 /*
526  * smbfs_create call
527  * Create a regular file. On entry the directory to contain the file being
528  * created is locked.  We must release before we return. We must also free
529  * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or
530  * only if the SAVESTART bit in cn_flags is clear on success.
531  */
532 static int
533 smbfs_create(ap)
534 	struct vop_create_args /* {
535 		struct vnode *a_dvp;
536 		struct vnode **a_vpp;
537 		struct componentname *a_cnp;
538 		struct vattr *a_vap;
539 	} */ *ap;
540 {
541 	struct vnode *dvp = ap->a_dvp;
542 	struct vattr *vap = ap->a_vap;
543 	struct vnode **vpp=ap->a_vpp;
544 	struct componentname *cnp = ap->a_cnp;
545 	struct smbnode *dnp = VTOSMB(dvp);
546 	struct vnode *vp;
547 	struct vattr vattr;
548 	struct smbfattr fattr;
549 	struct smb_cred *scred;
550 	char *name = cnp->cn_nameptr;
551 	int nmlen = cnp->cn_namelen;
552 	int error;
553 
554 
555 	SMBVDEBUG("\n");
556 	*vpp = NULL;
557 	if (vap->va_type != VREG)
558 		return EOPNOTSUPP;
559 	if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
560 		return error;
561 	scred = smbfs_malloc_scred();
562 	smb_makescred(scred, cnp->cn_thread, cnp->cn_cred);
563 
564 	error = smbfs_smb_create(dnp, name, nmlen, scred);
565 	if (error)
566 		goto out;
567 	error = smbfs_smb_lookup(dnp, name, nmlen, &fattr, scred);
568 	if (error)
569 		goto out;
570 	error = smbfs_nget(VTOVFS(dvp), dvp, name, nmlen, &fattr, &vp);
571 	if (error)
572 		goto out;
573 	*vpp = vp;
574 	if (cnp->cn_flags & MAKEENTRY)
575 		cache_enter(dvp, vp, cnp);
576 out:
577 	smbfs_free_scred(scred);
578 	return error;
579 }
580 
581 static int
582 smbfs_remove(ap)
583 	struct vop_remove_args /* {
584 		struct vnodeop_desc *a_desc;
585 		struct vnode * a_dvp;
586 		struct vnode * a_vp;
587 		struct componentname * a_cnp;
588 	} */ *ap;
589 {
590 	struct vnode *vp = ap->a_vp;
591 /*	struct vnode *dvp = ap->a_dvp;*/
592 	struct componentname *cnp = ap->a_cnp;
593 	struct smbnode *np = VTOSMB(vp);
594 	struct smb_cred *scred;
595 	int error;
596 
597 	if (vp->v_type == VDIR || (np->n_flag & NOPEN) != 0 || vrefcnt(vp) != 1)
598 		return EPERM;
599 	scred = smbfs_malloc_scred();
600 	smb_makescred(scred, cnp->cn_thread, cnp->cn_cred);
601 	error = smbfs_smb_delete(np, scred);
602 	if (error == 0)
603 		np->n_flag |= NGONE;
604 	cache_purge(vp);
605 	smbfs_free_scred(scred);
606 	return error;
607 }
608 
609 /*
610  * smbfs_file rename call
611  */
612 static int
613 smbfs_rename(ap)
614 	struct vop_rename_args  /* {
615 		struct vnode *a_fdvp;
616 		struct vnode *a_fvp;
617 		struct componentname *a_fcnp;
618 		struct vnode *a_tdvp;
619 		struct vnode *a_tvp;
620 		struct componentname *a_tcnp;
621 	} */ *ap;
622 {
623 	struct vnode *fvp = ap->a_fvp;
624 	struct vnode *tvp = ap->a_tvp;
625 	struct vnode *fdvp = ap->a_fdvp;
626 	struct vnode *tdvp = ap->a_tdvp;
627 	struct componentname *tcnp = ap->a_tcnp;
628 /*	struct componentname *fcnp = ap->a_fcnp;*/
629 	struct smb_cred *scred;
630 	u_int16_t flags = 6;
631 	int error=0;
632 
633 	scred = NULL;
634 	/* Check for cross-device rename */
635 	if ((fvp->v_mount != tdvp->v_mount) ||
636 	    (tvp && (fvp->v_mount != tvp->v_mount))) {
637 		error = EXDEV;
638 		goto out;
639 	}
640 
641 	if (tvp && vrefcnt(tvp) > 1) {
642 		error = EBUSY;
643 		goto out;
644 	}
645 	flags = 0x10;			/* verify all writes */
646 	if (fvp->v_type == VDIR) {
647 		flags |= 2;
648 	} else if (fvp->v_type == VREG) {
649 		flags |= 1;
650 	} else {
651 		return EINVAL;
652 	}
653 	scred = smbfs_malloc_scred();
654 	smb_makescred(scred, tcnp->cn_thread, tcnp->cn_cred);
655 	/*
656 	 * It seems that Samba doesn't implement SMB_COM_MOVE call...
657 	 */
658 #ifdef notnow
659 	if (SMB_DIALECT(SSTOCN(smp->sm_share)) >= SMB_DIALECT_LANMAN1_0) {
660 		error = smbfs_smb_move(VTOSMB(fvp), VTOSMB(tdvp),
661 		    tcnp->cn_nameptr, tcnp->cn_namelen, flags, scred);
662 	} else
663 #endif
664 	{
665 		/*
666 		 * We have to do the work atomicaly
667 		 */
668 		if (tvp && tvp != fvp) {
669 			error = smbfs_smb_delete(VTOSMB(tvp), scred);
670 			if (error)
671 				goto out_cacherem;
672 			VTOSMB(fvp)->n_flag |= NGONE;
673 		}
674 		error = smbfs_smb_rename(VTOSMB(fvp), VTOSMB(tdvp),
675 		    tcnp->cn_nameptr, tcnp->cn_namelen, scred);
676 	}
677 
678 	if (fvp->v_type == VDIR) {
679 		if (tvp != NULL && tvp->v_type == VDIR)
680 			cache_purge(tdvp);
681 		cache_purge(fdvp);
682 	}
683 
684 out_cacherem:
685 	smbfs_attr_cacheremove(fdvp);
686 	smbfs_attr_cacheremove(tdvp);
687 out:
688 	smbfs_free_scred(scred);
689 	if (tdvp == tvp)
690 		vrele(tdvp);
691 	else
692 		vput(tdvp);
693 	if (tvp)
694 		vput(tvp);
695 	vrele(fdvp);
696 	vrele(fvp);
697 #ifdef possible_mistake
698 	vgone(fvp);
699 	if (tvp)
700 		vgone(tvp);
701 #endif
702 	return error;
703 }
704 
705 /*
706  * somtime it will come true...
707  */
708 static int
709 smbfs_link(ap)
710 	struct vop_link_args /* {
711 		struct vnode *a_tdvp;
712 		struct vnode *a_vp;
713 		struct componentname *a_cnp;
714 	} */ *ap;
715 {
716 	return EOPNOTSUPP;
717 }
718 
719 /*
720  * smbfs_symlink link create call.
721  * Sometime it will be functional...
722  */
723 static int
724 smbfs_symlink(ap)
725 	struct vop_symlink_args /* {
726 		struct vnode *a_dvp;
727 		struct vnode **a_vpp;
728 		struct componentname *a_cnp;
729 		struct vattr *a_vap;
730 		char *a_target;
731 	} */ *ap;
732 {
733 	return EOPNOTSUPP;
734 }
735 
736 static int
737 smbfs_mknod(ap)
738 	struct vop_mknod_args /* {
739 	} */ *ap;
740 {
741 	return EOPNOTSUPP;
742 }
743 
744 static int
745 smbfs_mkdir(ap)
746 	struct vop_mkdir_args /* {
747 		struct vnode *a_dvp;
748 		struct vnode **a_vpp;
749 		struct componentname *a_cnp;
750 		struct vattr *a_vap;
751 	} */ *ap;
752 {
753 	struct vnode *dvp = ap->a_dvp;
754 /*	struct vattr *vap = ap->a_vap;*/
755 	struct vnode *vp;
756 	struct componentname *cnp = ap->a_cnp;
757 	struct smbnode *dnp = VTOSMB(dvp);
758 	struct vattr vattr;
759 	struct smb_cred *scred;
760 	struct smbfattr fattr;
761 	char *name = cnp->cn_nameptr;
762 	int len = cnp->cn_namelen;
763 	int error;
764 
765 	if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred))) {
766 		return error;
767 	}
768 	if ((name[0] == '.') && ((len == 1) || ((len == 2) && (name[1] == '.'))))
769 		return EEXIST;
770 	scred = smbfs_malloc_scred();
771 	smb_makescred(scred, cnp->cn_thread, cnp->cn_cred);
772 	error = smbfs_smb_mkdir(dnp, name, len, scred);
773 	if (error)
774 		goto out;
775 	error = smbfs_smb_lookup(dnp, name, len, &fattr, scred);
776 	if (error)
777 		goto out;
778 	error = smbfs_nget(VTOVFS(dvp), dvp, name, len, &fattr, &vp);
779 	if (error)
780 		goto out;
781 	*ap->a_vpp = vp;
782 out:
783 	smbfs_free_scred(scred);
784 	return error;
785 }
786 
787 /*
788  * smbfs_remove directory call
789  */
790 static int
791 smbfs_rmdir(ap)
792 	struct vop_rmdir_args /* {
793 		struct vnode *a_dvp;
794 		struct vnode *a_vp;
795 		struct componentname *a_cnp;
796 	} */ *ap;
797 {
798 	struct vnode *vp = ap->a_vp;
799 	struct vnode *dvp = ap->a_dvp;
800 	struct componentname *cnp = ap->a_cnp;
801 /*	struct smbmount *smp = VTOSMBFS(vp);*/
802 	struct smbnode *dnp = VTOSMB(dvp);
803 	struct smbnode *np = VTOSMB(vp);
804 	struct smb_cred *scred;
805 	int error;
806 
807 	if (dvp == vp)
808 		return EINVAL;
809 
810 	scred = smbfs_malloc_scred();
811 	smb_makescred(scred, cnp->cn_thread, cnp->cn_cred);
812 	error = smbfs_smb_rmdir(np, scred);
813 	if (error == 0)
814 		np->n_flag |= NGONE;
815 	dnp->n_flag |= NMODIFIED;
816 	smbfs_attr_cacheremove(dvp);
817 /*	cache_purge(dvp);*/
818 	cache_purge(vp);
819 	smbfs_free_scred(scred);
820 	return error;
821 }
822 
823 /*
824  * smbfs_readdir call
825  */
826 static int
827 smbfs_readdir(ap)
828 	struct vop_readdir_args /* {
829 		struct vnode *a_vp;
830 		struct uio *a_uio;
831 		struct ucred *a_cred;
832 		int *a_eofflag;
833 		u_long *a_cookies;
834 		int a_ncookies;
835 	} */ *ap;
836 {
837 	struct vnode *vp = ap->a_vp;
838 	struct uio *uio = ap->a_uio;
839 	int error;
840 
841 	if (vp->v_type != VDIR)
842 		return (EPERM);
843 #ifdef notnow
844 	if (ap->a_ncookies) {
845 		printf("smbfs_readdir: no support for cookies now...");
846 		return (EOPNOTSUPP);
847 	}
848 #endif
849 	error = smbfs_readvnode(vp, uio, ap->a_cred);
850 	return error;
851 }
852 
853 /* ARGSUSED */
854 static int
855 smbfs_fsync(ap)
856 	struct vop_fsync_args /* {
857 		struct vnodeop_desc *a_desc;
858 		struct vnode * a_vp;
859 		struct ucred * a_cred;
860 		int  a_waitfor;
861 		struct thread * a_td;
862 	} */ *ap;
863 {
864 /*	return (smb_flush(ap->a_vp, ap->a_cred, ap->a_waitfor, ap->a_td, 1));*/
865     return (0);
866 }
867 
868 static
869 int smbfs_print (ap)
870 	struct vop_print_args /* {
871 	struct vnode *a_vp;
872 	} */ *ap;
873 {
874 	struct vnode *vp = ap->a_vp;
875 	struct smbnode *np = VTOSMB(vp);
876 
877 	if (np == NULL) {
878 		printf("no smbnode data\n");
879 		return (0);
880 	}
881 	printf("\tname = %s, parent = %p, open = %d\n", np->n_name,
882 	    np->n_parent ? np->n_parent : NULL, (np->n_flag & NOPEN) != 0);
883 	return (0);
884 }
885 
886 static int
887 smbfs_pathconf (ap)
888 	struct vop_pathconf_args  /* {
889 	struct vnode *vp;
890 	int name;
891 	register_t *retval;
892 	} */ *ap;
893 {
894 	struct smbmount *smp = VFSTOSMBFS(VTOVFS(ap->a_vp));
895 	struct smb_vc *vcp = SSTOVC(smp->sm_share);
896 	register_t *retval = ap->a_retval;
897 	int error = 0;
898 
899 	switch (ap->a_name) {
900 	    case _PC_LINK_MAX:
901 		*retval = 0;
902 		break;
903 	    case _PC_NAME_MAX:
904 		*retval = (vcp->vc_hflags2 & SMB_FLAGS2_KNOWS_LONG_NAMES) ? 255 : 12;
905 		break;
906 	    case _PC_PATH_MAX:
907 		*retval = 800;	/* XXX: a correct one ? */
908 		break;
909 	    default:
910 		error = EINVAL;
911 	}
912 	return error;
913 }
914 
915 static int
916 smbfs_strategy (ap)
917 	struct vop_strategy_args /* {
918 	struct buf *a_bp
919 	} */ *ap;
920 {
921 	struct buf *bp=ap->a_bp;
922 	struct ucred *cr;
923 	struct thread *td;
924 
925 	SMBVDEBUG("\n");
926 	if (bp->b_flags & B_ASYNC)
927 		td = (struct thread *)0;
928 	else
929 		td = curthread;	/* XXX */
930 	if (bp->b_iocmd == BIO_READ)
931 		cr = bp->b_rcred;
932 	else
933 		cr = bp->b_wcred;
934 
935 	if ((bp->b_flags & B_ASYNC) == 0 )
936 		(void)smbfs_doio(ap->a_vp, bp, cr, td);
937 	return (0);
938 }
939 
940 int
941 smbfs_ioctl(ap)
942 	struct vop_ioctl_args /* {
943 		struct vnode *a_vp;
944 		u_long a_command;
945 		caddr_t a_data;
946 		int fflag;
947 		struct ucred *cred;
948 		struct thread *td;
949 	} */ *ap;
950 {
951 	return ENOTTY;
952 }
953 
954 static char smbfs_atl[] = "rhsvda";
955 static int
956 smbfs_getextattr(struct vop_getextattr_args *ap)
957 /* {
958         IN struct vnode *a_vp;
959         IN char *a_name;
960         INOUT struct uio *a_uio;
961         IN struct ucred *a_cred;
962         IN struct thread *a_td;
963 };
964 */
965 {
966 	struct vnode *vp = ap->a_vp;
967 	struct thread *td = ap->a_td;
968 	struct ucred *cred = ap->a_cred;
969 	struct uio *uio = ap->a_uio;
970 	const char *name = ap->a_name;
971 	struct smbnode *np = VTOSMB(vp);
972 	struct vattr vattr;
973 	char buf[10];
974 	int i, attr, error;
975 
976 	error = VOP_ACCESS(vp, VREAD, cred, td);
977 	if (error)
978 		return error;
979 	error = VOP_GETATTR(vp, &vattr, cred);
980 	if (error)
981 		return error;
982 	if (strcmp(name, "dosattr") == 0) {
983 		attr = np->n_dosattr;
984 		for (i = 0; i < 6; i++, attr >>= 1)
985 			buf[i] = (attr & 1) ? smbfs_atl[i] : '-';
986 		buf[i] = 0;
987 		error = uiomove(buf, i, uio);
988 
989 	} else
990 		error = EINVAL;
991 	return error;
992 }
993 
994 /*
995  * Since we expected to support F_GETLK (and SMB protocol has no such function),
996  * it is necessary to use lf_advlock(). It would be nice if this function had
997  * a callback mechanism because it will help to improve a level of consistency.
998  */
999 int
1000 smbfs_advlock(ap)
1001 	struct vop_advlock_args /* {
1002 		struct vnode *a_vp;
1003 		caddr_t  a_id;
1004 		int  a_op;
1005 		struct flock *a_fl;
1006 		int  a_flags;
1007 	} */ *ap;
1008 {
1009 	struct vnode *vp = ap->a_vp;
1010 	struct smbnode *np = VTOSMB(vp);
1011 	struct flock *fl = ap->a_fl;
1012 	caddr_t id = (caddr_t)1 /* ap->a_id */;
1013 /*	int flags = ap->a_flags;*/
1014 	struct thread *td = curthread;
1015 	struct smb_cred *scred;
1016 	u_quad_t size;
1017 	off_t start, end, oadd;
1018 	int error, lkop;
1019 
1020 	if (vp->v_type == VDIR) {
1021 		/*
1022 		 * SMB protocol have no support for directory locking.
1023 		 * Although locks can be processed on local machine, I don't
1024 		 * think that this is a good idea, because some programs
1025 		 * can work wrong assuming directory is locked. So, we just
1026 		 * return 'operation not supported
1027 		 */
1028 		 return EOPNOTSUPP;
1029 	}
1030 	size = np->n_size;
1031 	switch (fl->l_whence) {
1032 
1033 	case SEEK_SET:
1034 	case SEEK_CUR:
1035 		start = fl->l_start;
1036 		break;
1037 
1038 	case SEEK_END:
1039 		if (size > OFF_MAX ||
1040 		    (fl->l_start > 0 && size > OFF_MAX - fl->l_start))
1041 			return EOVERFLOW;
1042 		start = size + fl->l_start;
1043 		break;
1044 
1045 	default:
1046 		return EINVAL;
1047 	}
1048 	if (start < 0)
1049 		return EINVAL;
1050 	if (fl->l_len < 0) {
1051 		if (start == 0)
1052 			return EINVAL;
1053 		end = start - 1;
1054 		start += fl->l_len;
1055 		if (start < 0)
1056 			return EINVAL;
1057 	} else if (fl->l_len == 0)
1058 		end = -1;
1059 	else {
1060 		oadd = fl->l_len - 1;
1061 		if (oadd > OFF_MAX - start)
1062 			return EOVERFLOW;
1063 		end = start + oadd;
1064 	}
1065 	scred = smbfs_malloc_scred();
1066 	smb_makescred(scred, td, td->td_ucred);
1067 	switch (ap->a_op) {
1068 	    case F_SETLK:
1069 		switch (fl->l_type) {
1070 		    case F_WRLCK:
1071 			lkop = SMB_LOCK_EXCL;
1072 			break;
1073 		    case F_RDLCK:
1074 			lkop = SMB_LOCK_SHARED;
1075 			break;
1076 		    case F_UNLCK:
1077 			lkop = SMB_LOCK_RELEASE;
1078 			break;
1079 		    default:
1080 			smbfs_free_scred(scred);
1081 			return EINVAL;
1082 		}
1083 		error = lf_advlock(ap, &vp->v_lockf, size);
1084 		if (error)
1085 			break;
1086 		lkop = SMB_LOCK_EXCL;
1087 		error = smbfs_smb_lock(np, lkop, id, start, end, scred);
1088 		if (error) {
1089 			int oldtype = fl->l_type;
1090 			fl->l_type = F_UNLCK;
1091 			ap->a_op = F_UNLCK;
1092 			lf_advlock(ap, &vp->v_lockf, size);
1093 			fl->l_type = oldtype;
1094 		}
1095 		break;
1096 	    case F_UNLCK:
1097 		lf_advlock(ap, &vp->v_lockf, size);
1098 		error = smbfs_smb_lock(np, SMB_LOCK_RELEASE, id, start, end, scred);
1099 		break;
1100 	    case F_GETLK:
1101 		error = lf_advlock(ap, &vp->v_lockf, size);
1102 		break;
1103 	    default:
1104 		smbfs_free_scred(scred);
1105 		return EINVAL;
1106 	}
1107 	smbfs_free_scred(scred);
1108 	return error;
1109 }
1110 
1111 static int
1112 smbfs_pathcheck(struct smbmount *smp, const char *name, int nmlen, int nameiop)
1113 {
1114 	static const char *badchars = "*/:<>;?";
1115 	static const char *badchars83 = " +|,[]=";
1116 	const char *cp;
1117 	int i, error;
1118 
1119 	/*
1120 	 * Backslash characters, being a path delimiter, are prohibited
1121 	 * within a path component even for LOOKUP operations.
1122 	 */
1123 	if (strchr(name, '\\') != NULL)
1124 		return ENOENT;
1125 
1126 	if (nameiop == LOOKUP)
1127 		return 0;
1128 	error = ENOENT;
1129 	if (SMB_DIALECT(SSTOVC(smp->sm_share)) < SMB_DIALECT_LANMAN2_0) {
1130 		/*
1131 		 * Name should conform 8.3 format
1132 		 */
1133 		if (nmlen > 12)
1134 			return ENAMETOOLONG;
1135 		cp = strchr(name, '.');
1136 		if (cp == NULL)
1137 			return error;
1138 		if (cp == name || (cp - name) > 8)
1139 			return error;
1140 		cp = strchr(cp + 1, '.');
1141 		if (cp != NULL)
1142 			return error;
1143 		for (cp = name, i = 0; i < nmlen; i++, cp++)
1144 			if (strchr(badchars83, *cp) != NULL)
1145 				return error;
1146 	}
1147 	for (cp = name, i = 0; i < nmlen; i++, cp++)
1148 		if (strchr(badchars, *cp) != NULL)
1149 			return error;
1150 	return 0;
1151 }
1152 
1153 /*
1154  * Things go even weird without fixed inode numbers...
1155  */
1156 int
1157 smbfs_lookup(ap)
1158 	struct vop_lookup_args /* {
1159 		struct vnodeop_desc *a_desc;
1160 		struct vnode *a_dvp;
1161 		struct vnode **a_vpp;
1162 		struct componentname *a_cnp;
1163 	} */ *ap;
1164 {
1165 	struct componentname *cnp = ap->a_cnp;
1166 	struct thread *td = cnp->cn_thread;
1167 	struct vnode *dvp = ap->a_dvp;
1168 	struct vnode **vpp = ap->a_vpp;
1169 	struct vnode *vp;
1170 	struct smbmount *smp;
1171 	struct mount *mp = dvp->v_mount;
1172 	struct smbnode *dnp;
1173 	struct smbfattr fattr, *fap;
1174 	struct smb_cred *scred;
1175 	char *name = cnp->cn_nameptr;
1176 	int flags = cnp->cn_flags;
1177 	int nameiop = cnp->cn_nameiop;
1178 	int nmlen = cnp->cn_namelen;
1179 	int error, islastcn, isdot;
1180 	int killit;
1181 
1182 	SMBVDEBUG("\n");
1183 	if (dvp->v_type != VDIR)
1184 		return ENOTDIR;
1185 	if ((flags & ISDOTDOT) && (dvp->v_vflag & VV_ROOT)) {
1186 		SMBFSERR("invalid '..'\n");
1187 		return EIO;
1188 	}
1189 	islastcn = flags & ISLASTCN;
1190 	if (islastcn && (mp->mnt_flag & MNT_RDONLY) && (nameiop != LOOKUP))
1191 		return EROFS;
1192 	if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)) != 0)
1193 		return error;
1194 	smp = VFSTOSMBFS(mp);
1195 	dnp = VTOSMB(dvp);
1196 	isdot = (nmlen == 1 && name[0] == '.');
1197 
1198 	error = smbfs_pathcheck(smp, cnp->cn_nameptr, cnp->cn_namelen, nameiop);
1199 
1200 	if (error)
1201 		return ENOENT;
1202 
1203 	error = cache_lookup(dvp, vpp, cnp, NULL, NULL);
1204 	SMBVDEBUG("cache_lookup returned %d\n", error);
1205 	if (error > 0)
1206 		return error;
1207 	if (error) {		/* name was found */
1208 		struct vattr vattr;
1209 
1210 		killit = 0;
1211 		vp = *vpp;
1212 		error = VOP_GETATTR(vp, &vattr, cnp->cn_cred);
1213 		/*
1214 		 * If the file type on the server is inconsistent
1215 		 * with what it was when we created the vnode,
1216 		 * kill the bogus vnode now and fall through to
1217 		 * the code below to create a new one with the
1218 		 * right type.
1219 		 */
1220 		if (error == 0 &&
1221 		   ((vp->v_type == VDIR &&
1222 		   (VTOSMB(vp)->n_dosattr & SMB_FA_DIR) == 0) ||
1223 		   (vp->v_type == VREG &&
1224 		   (VTOSMB(vp)->n_dosattr & SMB_FA_DIR) != 0)))
1225 		   killit = 1;
1226 		else if (error == 0
1227 	     /*    && vattr.va_ctime.tv_sec == VTOSMB(vp)->n_ctime*/) {
1228 		     if (nameiop != LOOKUP && islastcn)
1229 			     cnp->cn_flags |= SAVENAME;
1230 		     SMBVDEBUG("use cached vnode\n");
1231 		     return (0);
1232 		}
1233 		cache_purge(vp);
1234 		/*
1235 		 * XXX This is not quite right, if '.' is
1236 		 * inconsistent, we really need to start the lookup
1237 		 * all over again.  Hopefully there is some other
1238 		 * guarantee that prevents this case from happening.
1239 		 */
1240 		if (killit && vp != dvp)
1241 			vgone(vp);
1242 		if (vp != dvp)
1243 			vput(vp);
1244 		else
1245 			vrele(vp);
1246 		*vpp = NULLVP;
1247 	}
1248 	/*
1249 	 * entry is not in the cache or has been expired
1250 	 */
1251 	error = 0;
1252 	*vpp = NULLVP;
1253 	scred = smbfs_malloc_scred();
1254 	smb_makescred(scred, td, cnp->cn_cred);
1255 	fap = &fattr;
1256 	if (flags & ISDOTDOT) {
1257 		/*
1258 		 * In the DOTDOT case, don't go over-the-wire
1259 		 * in order to request attributes. We already
1260 		 * know it's a directory and subsequent call to
1261 		 * smbfs_getattr() will restore consistency.
1262 		 *
1263 		 */
1264 		SMBVDEBUG("smbfs_smb_lookup: dotdot\n");
1265 	} else if (isdot) {
1266 		error = smbfs_smb_lookup(dnp, NULL, 0, fap, scred);
1267 		SMBVDEBUG("result of smbfs_smb_lookup: %d\n", error);
1268 	}
1269 	else {
1270 		error = smbfs_smb_lookup(dnp, name, nmlen, fap, scred);
1271 		SMBVDEBUG("result of smbfs_smb_lookup: %d\n", error);
1272 	}
1273 	if (error && error != ENOENT)
1274 		goto out;
1275 	if (error) {			/* entry not found */
1276 		/*
1277 		 * Handle RENAME or CREATE case...
1278 		 */
1279 		if ((nameiop == CREATE || nameiop == RENAME) && islastcn) {
1280 			error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td);
1281 			if (error)
1282 				goto out;
1283 			cnp->cn_flags |= SAVENAME;
1284 			error = EJUSTRETURN;
1285 			goto out;
1286 		}
1287 		error = ENOENT;
1288 		goto out;
1289 	}/* else {
1290 		SMBVDEBUG("Found entry %s with id=%d\n", fap->entryName, fap->dirEntNum);
1291 	}*/
1292 	/*
1293 	 * handle DELETE case ...
1294 	 */
1295 	if (nameiop == DELETE && islastcn) { 	/* delete last component */
1296 		error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td);
1297 		if (error)
1298 			goto out;
1299 		if (isdot) {
1300 			VREF(dvp);
1301 			*vpp = dvp;
1302 			goto out;
1303 		}
1304 		error = smbfs_nget(mp, dvp, name, nmlen, fap, &vp);
1305 		if (error)
1306 			goto out;
1307 		*vpp = vp;
1308 		cnp->cn_flags |= SAVENAME;
1309 		goto out;
1310 	}
1311 	if (nameiop == RENAME && islastcn) {
1312 		error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td);
1313 		if (error)
1314 			goto out;
1315 		if (isdot) {
1316 			error = EISDIR;
1317 			goto out;
1318 		}
1319 		error = smbfs_nget(mp, dvp, name, nmlen, fap, &vp);
1320 		if (error)
1321 			goto out;
1322 		*vpp = vp;
1323 		cnp->cn_flags |= SAVENAME;
1324 		goto out;
1325 	}
1326 	if (flags & ISDOTDOT) {
1327 		mp = dvp->v_mount;
1328 		error = vfs_busy(mp, MBF_NOWAIT);
1329 		if (error != 0) {
1330 			vfs_ref(mp);
1331 			VOP_UNLOCK(dvp, 0);
1332 			error = vfs_busy(mp, 0);
1333 			vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
1334 			vfs_rel(mp);
1335 			if (error) {
1336 				error = ENOENT;
1337 				goto out;
1338 			}
1339 			if ((dvp->v_iflag & VI_DOOMED) != 0) {
1340 				vfs_unbusy(mp);
1341 				error = ENOENT;
1342 				goto out;
1343 			}
1344 		}
1345 		VOP_UNLOCK(dvp, 0);
1346 		error = smbfs_nget(mp, dvp, name, nmlen, NULL, &vp);
1347 		vfs_unbusy(mp);
1348 		vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
1349 		if ((dvp->v_iflag & VI_DOOMED) != 0) {
1350 			if (error == 0)
1351 				vput(vp);
1352 			error = ENOENT;
1353 		}
1354 		if (error)
1355 			goto out;
1356 		*vpp = vp;
1357 	} else if (isdot) {
1358 		vref(dvp);
1359 		*vpp = dvp;
1360 	} else {
1361 		error = smbfs_nget(mp, dvp, name, nmlen, fap, &vp);
1362 		if (error)
1363 			goto out;
1364 		*vpp = vp;
1365 		SMBVDEBUG("lookup: getnewvp!\n");
1366 	}
1367 	if ((cnp->cn_flags & MAKEENTRY)/* && !islastcn*/) {
1368 /*		VTOSMB(*vpp)->n_ctime = VTOSMB(*vpp)->n_vattr.va_ctime.tv_sec;*/
1369 		cache_enter(dvp, *vpp, cnp);
1370 	}
1371 out:
1372 	smbfs_free_scred(scred);
1373 	return (error);
1374 }
1375