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 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Boris Popov.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * $Id: smbfs_vnops.c,v 1.128.36.1 2005/05/27 02:35:28 lindak Exp $
33 */
34
35 /*
36 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
37 */
38
39 #include <sys/systm.h>
40 #include <sys/cred.h>
41 #include <sys/vnode.h>
42 #include <sys/vfs.h>
43 #include <sys/filio.h>
44 #include <sys/uio.h>
45 #include <sys/dirent.h>
46 #include <sys/errno.h>
47 #include <sys/sunddi.h>
48 #include <sys/sysmacros.h>
49 #include <sys/kmem.h>
50 #include <sys/cmn_err.h>
51 #include <sys/vfs_opreg.h>
52 #include <sys/policy.h>
53
54 #include <netsmb/smb_osdep.h>
55 #include <netsmb/smb.h>
56 #include <netsmb/smb_conn.h>
57 #include <netsmb/smb_subr.h>
58
59 #include <smbfs/smbfs.h>
60 #include <smbfs/smbfs_node.h>
61 #include <smbfs/smbfs_subr.h>
62
63 #include <sys/fs/smbfs_ioctl.h>
64 #include <fs/fs_subr.h>
65
66 /*
67 * We assign directory offsets like the NFS client, where the
68 * offset increments by _one_ after each directory entry.
69 * Further, the entries "." and ".." are always at offsets
70 * zero and one (respectively) and the "real" entries from
71 * the server appear at offsets starting with two. This
72 * macro is used to initialize the n_dirofs field after
73 * setting n_dirseq with a _findopen call.
74 */
75 #define FIRST_DIROFS 2
76
77 /*
78 * These characters are illegal in NTFS file names.
79 * ref: http://support.microsoft.com/kb/147438
80 *
81 * Careful! The check in the XATTR case skips the
82 * first character to allow colon in XATTR names.
83 */
84 static const char illegal_chars[] = {
85 ':', /* colon - keep this first! */
86 '\\', /* back slash */
87 '/', /* slash */
88 '*', /* asterisk */
89 '?', /* question mark */
90 '"', /* double quote */
91 '<', /* less than sign */
92 '>', /* greater than sign */
93 '|', /* vertical bar */
94 0
95 };
96
97 /*
98 * Turning this on causes nodes to be created in the cache
99 * during directory listings, normally avoiding a second
100 * OtW attribute fetch just after a readdir.
101 */
102 int smbfs_fastlookup = 1;
103
104 /* local static function defines */
105
106 static int smbfslookup_cache(vnode_t *, char *, int, vnode_t **,
107 cred_t *);
108 static int smbfslookup(vnode_t *dvp, char *nm, vnode_t **vpp, cred_t *cr,
109 int cache_ok, caller_context_t *);
110 static int smbfsrename(vnode_t *odvp, char *onm, vnode_t *ndvp, char *nnm,
111 cred_t *cr, caller_context_t *);
112 static int smbfssetattr(vnode_t *, struct vattr *, int, cred_t *);
113 static int smbfs_accessx(void *, int, cred_t *);
114 static int smbfs_readvdir(vnode_t *vp, uio_t *uio, cred_t *cr, int *eofp,
115 caller_context_t *);
116 static void smbfs_rele_fid(smbnode_t *, struct smb_cred *);
117
118 /*
119 * These are the vnode ops routines which implement the vnode interface to
120 * the networked file system. These routines just take their parameters,
121 * make them look networkish by putting the right info into interface structs,
122 * and then calling the appropriate remote routine(s) to do the work.
123 *
124 * Note on directory name lookup cacheing: If we detect a stale fhandle,
125 * we purge the directory cache relative to that vnode. This way, the
126 * user won't get burned by the cache repeatedly. See <smbfs/smbnode.h> for
127 * more details on smbnode locking.
128 */
129
130 static int smbfs_open(vnode_t **, int, cred_t *, caller_context_t *);
131 static int smbfs_close(vnode_t *, int, int, offset_t, cred_t *,
132 caller_context_t *);
133 static int smbfs_read(vnode_t *, struct uio *, int, cred_t *,
134 caller_context_t *);
135 static int smbfs_write(vnode_t *, struct uio *, int, cred_t *,
136 caller_context_t *);
137 static int smbfs_ioctl(vnode_t *, int, intptr_t, int, cred_t *, int *,
138 caller_context_t *);
139 static int smbfs_getattr(vnode_t *, struct vattr *, int, cred_t *,
140 caller_context_t *);
141 static int smbfs_setattr(vnode_t *, struct vattr *, int, cred_t *,
142 caller_context_t *);
143 static int smbfs_access(vnode_t *, int, int, cred_t *, caller_context_t *);
144 static int smbfs_fsync(vnode_t *, int, cred_t *, caller_context_t *);
145 static void smbfs_inactive(vnode_t *, cred_t *, caller_context_t *);
146 static int smbfs_lookup(vnode_t *, char *, vnode_t **, struct pathname *,
147 int, vnode_t *, cred_t *, caller_context_t *,
148 int *, pathname_t *);
149 static int smbfs_create(vnode_t *, char *, struct vattr *, enum vcexcl,
150 int, vnode_t **, cred_t *, int, caller_context_t *,
151 vsecattr_t *);
152 static int smbfs_remove(vnode_t *, char *, cred_t *, caller_context_t *,
153 int);
154 static int smbfs_rename(vnode_t *, char *, vnode_t *, char *, cred_t *,
155 caller_context_t *, int);
156 static int smbfs_mkdir(vnode_t *, char *, struct vattr *, vnode_t **,
157 cred_t *, caller_context_t *, int, vsecattr_t *);
158 static int smbfs_rmdir(vnode_t *, char *, vnode_t *, cred_t *,
159 caller_context_t *, int);
160 static int smbfs_readdir(vnode_t *, struct uio *, cred_t *, int *,
161 caller_context_t *, int);
162 static int smbfs_rwlock(vnode_t *, int, caller_context_t *);
163 static void smbfs_rwunlock(vnode_t *, int, caller_context_t *);
164 static int smbfs_seek(vnode_t *, offset_t, offset_t *, caller_context_t *);
165 static int smbfs_frlock(vnode_t *, int, struct flock64 *, int, offset_t,
166 struct flk_callback *, cred_t *, caller_context_t *);
167 static int smbfs_space(vnode_t *, int, struct flock64 *, int, offset_t,
168 cred_t *, caller_context_t *);
169 static int smbfs_pathconf(vnode_t *, int, ulong_t *, cred_t *,
170 caller_context_t *);
171 static int smbfs_setsecattr(vnode_t *, vsecattr_t *, int, cred_t *,
172 caller_context_t *);
173 static int smbfs_getsecattr(vnode_t *, vsecattr_t *, int, cred_t *,
174 caller_context_t *);
175 static int smbfs_shrlock(vnode_t *, int, struct shrlock *, int, cred_t *,
176 caller_context_t *);
177
178 /* Dummy function to use until correct function is ported in */
179 int noop_vnodeop() {
180 return (0);
181 }
182
183 struct vnodeops *smbfs_vnodeops = NULL;
184
185 /*
186 * Most unimplemented ops will return ENOSYS because of fs_nosys().
187 * The only ops where that won't work are ACCESS (due to open(2)
188 * failures) and ... (anything else left?)
189 */
190 const fs_operation_def_t smbfs_vnodeops_template[] = {
191 { VOPNAME_OPEN, { .vop_open = smbfs_open } },
192 { VOPNAME_CLOSE, { .vop_close = smbfs_close } },
193 { VOPNAME_READ, { .vop_read = smbfs_read } },
194 { VOPNAME_WRITE, { .vop_write = smbfs_write } },
195 { VOPNAME_IOCTL, { .vop_ioctl = smbfs_ioctl } },
196 { VOPNAME_GETATTR, { .vop_getattr = smbfs_getattr } },
197 { VOPNAME_SETATTR, { .vop_setattr = smbfs_setattr } },
198 { VOPNAME_ACCESS, { .vop_access = smbfs_access } },
199 { VOPNAME_LOOKUP, { .vop_lookup = smbfs_lookup } },
200 { VOPNAME_CREATE, { .vop_create = smbfs_create } },
201 { VOPNAME_REMOVE, { .vop_remove = smbfs_remove } },
202 { VOPNAME_LINK, { .error = fs_nosys } }, /* smbfs_link, */
203 { VOPNAME_RENAME, { .vop_rename = smbfs_rename } },
204 { VOPNAME_MKDIR, { .vop_mkdir = smbfs_mkdir } },
205 { VOPNAME_RMDIR, { .vop_rmdir = smbfs_rmdir } },
206 { VOPNAME_READDIR, { .vop_readdir = smbfs_readdir } },
207 { VOPNAME_SYMLINK, { .error = fs_nosys } }, /* smbfs_symlink, */
208 { VOPNAME_READLINK, { .error = fs_nosys } }, /* smbfs_readlink, */
209 { VOPNAME_FSYNC, { .vop_fsync = smbfs_fsync } },
210 { VOPNAME_INACTIVE, { .vop_inactive = smbfs_inactive } },
211 { VOPNAME_FID, { .error = fs_nosys } }, /* smbfs_fid, */
212 { VOPNAME_RWLOCK, { .vop_rwlock = smbfs_rwlock } },
213 { VOPNAME_RWUNLOCK, { .vop_rwunlock = smbfs_rwunlock } },
214 { VOPNAME_SEEK, { .vop_seek = smbfs_seek } },
215 { VOPNAME_FRLOCK, { .vop_frlock = smbfs_frlock } },
216 { VOPNAME_SPACE, { .vop_space = smbfs_space } },
217 { VOPNAME_REALVP, { .error = fs_nosys } }, /* smbfs_realvp, */
218 { VOPNAME_GETPAGE, { .error = fs_nosys } }, /* smbfs_getpage, */
219 { VOPNAME_PUTPAGE, { .error = fs_nosys } }, /* smbfs_putpage, */
220 { VOPNAME_MAP, { .error = fs_nosys } }, /* smbfs_map, */
221 { VOPNAME_ADDMAP, { .error = fs_nosys } }, /* smbfs_addmap, */
222 { VOPNAME_DELMAP, { .error = fs_nosys } }, /* smbfs_delmap, */
223 { VOPNAME_DUMP, { .error = fs_nosys } }, /* smbfs_dump, */
224 { VOPNAME_PATHCONF, { .vop_pathconf = smbfs_pathconf } },
225 { VOPNAME_PAGEIO, { .error = fs_nosys } }, /* smbfs_pageio, */
226 { VOPNAME_SETSECATTR, { .vop_setsecattr = smbfs_setsecattr } },
227 { VOPNAME_GETSECATTR, { .vop_getsecattr = smbfs_getsecattr } },
228 { VOPNAME_SHRLOCK, { .vop_shrlock = smbfs_shrlock } },
229 { NULL, NULL }
230 };
231
232 /*
233 * XXX
234 * When new and relevant functionality is enabled, we should be
235 * calling vfs_set_feature() to inform callers that pieces of
236 * functionality are available, per PSARC 2007/227.
237 */
238 /* ARGSUSED */
239 static int
240 smbfs_open(vnode_t **vpp, int flag, cred_t *cr, caller_context_t *ct)
241 {
242 smbnode_t *np;
243 vnode_t *vp;
244 smbfattr_t fa;
245 u_int32_t rights, rightsrcvd;
246 u_int16_t fid, oldfid;
247 int oldgenid;
248 struct smb_cred scred;
249 smbmntinfo_t *smi;
250 smb_share_t *ssp;
251 cred_t *oldcr;
252 int tmperror;
253 int error = 0;
254
255 vp = *vpp;
256 np = VTOSMB(vp);
257 smi = VTOSMI(vp);
258 ssp = smi->smi_share;
259
260 if (curproc->p_zone != smi->smi_zone_ref.zref_zone)
261 return (EIO);
262
263 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED)
264 return (EIO);
265
266 if (vp->v_type != VREG && vp->v_type != VDIR) { /* XXX VLNK? */
267 SMBVDEBUG("open eacces vtype=%d\n", vp->v_type);
268 return (EACCES);
269 }
270
271 /*
272 * Get exclusive access to n_fid and related stuff.
273 * No returns after this until out.
274 */
275 if (smbfs_rw_enter_sig(&np->r_lkserlock, RW_WRITER, SMBINTR(vp)))
276 return (EINTR);
277 smb_credinit(&scred, cr);
278
279 /*
280 * Keep track of the vnode type at first open.
281 * It may change later, and we need close to do
282 * cleanup for the type we opened. Also deny
283 * open of new types until old type is closed.
284 * XXX: Per-open instance nodes whould help.
285 */
286 if (np->n_ovtype == VNON) {
287 ASSERT(np->n_dirrefs == 0);
288 ASSERT(np->n_fidrefs == 0);
289 } else if (np->n_ovtype != vp->v_type) {
290 SMBVDEBUG("open n_ovtype=%d v_type=%d\n",
291 np->n_ovtype, vp->v_type);
292 error = EACCES;
293 goto out;
294 }
295
296 /*
297 * Directory open. See smbfs_readvdir()
298 */
299 if (vp->v_type == VDIR) {
300 if (np->n_dirseq == NULL) {
301 /* first open */
302 error = smbfs_smb_findopen(np, "*", 1,
303 SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR,
304 &scred, &np->n_dirseq);
305 if (error != 0)
306 goto out;
307 }
308 np->n_dirofs = FIRST_DIROFS;
309 np->n_dirrefs++;
310 goto have_fid;
311 }
312
313 /*
314 * If caller specified O_TRUNC/FTRUNC, then be sure to set
315 * FWRITE (to drive successful setattr(size=0) after open)
316 */
317 if (flag & FTRUNC)
318 flag |= FWRITE;
319
320 /*
321 * If we already have it open, and the FID is still valid,
322 * check whether the rights are sufficient for FID reuse.
323 */
324 if (np->n_fidrefs > 0 &&
325 np->n_vcgenid == ssp->ss_vcgenid) {
326 int upgrade = 0;
327
328 if ((flag & FWRITE) &&
329 !(np->n_rights & SA_RIGHT_FILE_WRITE_DATA))
330 upgrade = 1;
331 if ((flag & FREAD) &&
332 !(np->n_rights & SA_RIGHT_FILE_READ_DATA))
333 upgrade = 1;
334 if (!upgrade) {
335 /*
336 * the existing open is good enough
337 */
338 np->n_fidrefs++;
339 goto have_fid;
340 }
341 }
342 rights = np->n_fidrefs ? np->n_rights : 0;
343
344 /*
345 * we always ask for READ_CONTROL so we can always get the
346 * owner/group IDs to satisfy a stat. Ditto attributes.
347 */
348 rights |= (STD_RIGHT_READ_CONTROL_ACCESS |
349 SA_RIGHT_FILE_READ_ATTRIBUTES);
350 if ((flag & FREAD))
351 rights |= SA_RIGHT_FILE_READ_DATA;
352 if ((flag & FWRITE))
353 rights |= SA_RIGHT_FILE_WRITE_DATA |
354 SA_RIGHT_FILE_APPEND_DATA |
355 SA_RIGHT_FILE_WRITE_ATTRIBUTES;
356
357 bzero(&fa, sizeof (fa));
358 error = smbfs_smb_open(np,
359 NULL, 0, 0, /* name nmlen xattr */
360 rights, &scred,
361 &fid, &rightsrcvd, &fa);
362 if (error)
363 goto out;
364 smbfs_attrcache_fa(vp, &fa);
365
366 /*
367 * We have a new FID and access rights.
368 */
369 oldfid = np->n_fid;
370 oldgenid = np->n_vcgenid;
371 np->n_fid = fid;
372 np->n_vcgenid = ssp->ss_vcgenid;
373 np->n_rights = rightsrcvd;
374 np->n_fidrefs++;
375 if (np->n_fidrefs > 1 &&
376 oldgenid == ssp->ss_vcgenid) {
377 /*
378 * We already had it open (presumably because
379 * it was open with insufficient rights.)
380 * Close old wire-open.
381 */
382 tmperror = smbfs_smb_close(ssp,
383 oldfid, NULL, &scred);
384 if (tmperror)
385 SMBVDEBUG("error %d closing %s\n",
386 tmperror, np->n_rpath);
387 }
388
389 /*
390 * This thread did the open.
391 * Save our credentials too.
392 */
393 mutex_enter(&np->r_statelock);
394 oldcr = np->r_cred;
395 np->r_cred = cr;
396 crhold(cr);
397 if (oldcr)
398 crfree(oldcr);
399 mutex_exit(&np->r_statelock);
400
401 have_fid:
402 /*
403 * Keep track of the vnode type at first open.
404 * (see comments above)
405 */
406 if (np->n_ovtype == VNON)
407 np->n_ovtype = vp->v_type;
408
409 out:
410 smb_credrele(&scred);
411 smbfs_rw_exit(&np->r_lkserlock);
412 return (error);
413 }
414
415 /*ARGSUSED*/
416 static int
417 smbfs_close(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr,
418 caller_context_t *ct)
419 {
420 smbnode_t *np;
421 smbmntinfo_t *smi;
422 struct smb_cred scred;
423
424 np = VTOSMB(vp);
425 smi = VTOSMI(vp);
426
427 /*
428 * Don't "bail out" for VFS_UNMOUNTED here,
429 * as we want to do cleanup, etc.
430 */
431
432 /*
433 * zone_enter(2) prevents processes from changing zones with SMBFS files
434 * open; if we happen to get here from the wrong zone we can't do
435 * anything over the wire.
436 */
437 if (smi->smi_zone_ref.zref_zone != curproc->p_zone) {
438 /*
439 * We could attempt to clean up locks, except we're sure
440 * that the current process didn't acquire any locks on
441 * the file: any attempt to lock a file belong to another zone
442 * will fail, and one can't lock an SMBFS file and then change
443 * zones, as that fails too.
444 *
445 * Returning an error here is the sane thing to do. A
446 * subsequent call to VN_RELE() which translates to a
447 * smbfs_inactive() will clean up state: if the zone of the
448 * vnode's origin is still alive and kicking, an async worker
449 * thread will handle the request (from the correct zone), and
450 * everything (minus the final smbfs_getattr_otw() call) should
451 * be OK. If the zone is going away smbfs_async_inactive() will
452 * throw away cached pages inline.
453 */
454 return (EIO);
455 }
456
457 /*
458 * If we are using local locking for this filesystem, then
459 * release all of the SYSV style record locks. Otherwise,
460 * we are doing network locking and we need to release all
461 * of the network locks. All of the locks held by this
462 * process on this file are released no matter what the
463 * incoming reference count is.
464 */
465 if (smi->smi_flags & SMI_LLOCK) {
466 pid_t pid = ddi_get_pid();
467 cleanlocks(vp, pid, 0);
468 cleanshares(vp, pid);
469 }
470
471 /*
472 * This (passed in) count is the ref. count from the
473 * user's file_t before the closef call (fio.c).
474 * We only care when the reference goes away.
475 */
476 if (count > 1)
477 return (0);
478
479 /*
480 * Decrement the reference count for the FID
481 * and possibly do the OtW close.
482 *
483 * Exclusive lock for modifying n_fid stuff.
484 * Don't want this one ever interruptible.
485 */
486 (void) smbfs_rw_enter_sig(&np->r_lkserlock, RW_WRITER, 0);
487 smb_credinit(&scred, cr);
488
489 smbfs_rele_fid(np, &scred);
490
491 smb_credrele(&scred);
492 smbfs_rw_exit(&np->r_lkserlock);
493
494 return (0);
495 }
496
497 /*
498 * Helper for smbfs_close. Decrement the reference count
499 * for an SMB-level file or directory ID, and when the last
500 * reference for the fid goes away, do the OtW close.
501 * Also called in smbfs_inactive (defensive cleanup).
502 */
503 static void
504 smbfs_rele_fid(smbnode_t *np, struct smb_cred *scred)
505 {
506 smb_share_t *ssp;
507 cred_t *oldcr;
508 struct smbfs_fctx *fctx;
509 int error;
510 uint16_t ofid;
511
512 ssp = np->n_mount->smi_share;
513 error = 0;
514
515 /* Make sure we serialize for n_dirseq use. */
516 ASSERT(smbfs_rw_lock_held(&np->r_lkserlock, RW_WRITER));
517
518 /*
519 * Note that vp->v_type may change if a remote node
520 * is deleted and recreated as a different type, and
521 * our getattr may change v_type accordingly.
522 * Now use n_ovtype to keep track of the v_type
523 * we had during open (see comments above).
524 */
525 switch (np->n_ovtype) {
526 case VDIR:
527 ASSERT(np->n_dirrefs > 0);
528 if (--np->n_dirrefs)
529 return;
530 if ((fctx = np->n_dirseq) != NULL) {
531 np->n_dirseq = NULL;
532 np->n_dirofs = 0;
533 error = smbfs_smb_findclose(fctx, scred);
534 }
535 break;
536
537 case VREG:
538 ASSERT(np->n_fidrefs > 0);
539 if (--np->n_fidrefs)
540 return;
541 if ((ofid = np->n_fid) != SMB_FID_UNUSED) {
542 np->n_fid = SMB_FID_UNUSED;
543 /* After reconnect, n_fid is invalid */
544 if (np->n_vcgenid == ssp->ss_vcgenid) {
545 error = smbfs_smb_close(
546 ssp, ofid, NULL, scred);
547 }
548 }
549 break;
550
551 default:
552 SMBVDEBUG("bad n_ovtype %d\n", np->n_ovtype);
553 break;
554 }
555 if (error) {
556 SMBVDEBUG("error %d closing %s\n",
557 error, np->n_rpath);
558 }
559
560 /* Allow next open to use any v_type. */
561 np->n_ovtype = VNON;
562
563 /*
564 * Other "last close" stuff.
565 */
566 mutex_enter(&np->r_statelock);
567 if (np->n_flag & NATTRCHANGED)
568 smbfs_attrcache_rm_locked(np);
569 oldcr = np->r_cred;
570 np->r_cred = NULL;
571 mutex_exit(&np->r_statelock);
572 if (oldcr != NULL)
573 crfree(oldcr);
574 }
575
576 /* ARGSUSED */
577 static int
578 smbfs_read(vnode_t *vp, struct uio *uiop, int ioflag, cred_t *cr,
579 caller_context_t *ct)
580 {
581 struct smb_cred scred;
582 struct vattr va;
583 smbnode_t *np;
584 smbmntinfo_t *smi;
585 smb_share_t *ssp;
586 offset_t endoff;
587 ssize_t past_eof;
588 int error;
589
590 np = VTOSMB(vp);
591 smi = VTOSMI(vp);
592 ssp = smi->smi_share;
593
594 if (curproc->p_zone != smi->smi_zone_ref.zref_zone)
595 return (EIO);
596
597 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED)
598 return (EIO);
599
600 ASSERT(smbfs_rw_lock_held(&np->r_rwlock, RW_READER));
601
602 if (vp->v_type != VREG)
603 return (EISDIR);
604
605 if (uiop->uio_resid == 0)
606 return (0);
607
608 /*
609 * Like NFS3, just check for 63-bit overflow.
610 * Our SMB layer takes care to return EFBIG
611 * when it has to fallback to a 32-bit call.
612 */
613 endoff = uiop->uio_loffset + uiop->uio_resid;
614 if (uiop->uio_loffset < 0 || endoff < 0)
615 return (EINVAL);
616
617 /* get vnode attributes from server */
618 va.va_mask = AT_SIZE | AT_MTIME;
619 if (error = smbfsgetattr(vp, &va, cr))
620 return (error);
621
622 /* Update mtime with mtime from server here? */
623
624 /* if offset is beyond EOF, read nothing */
625 if (uiop->uio_loffset >= va.va_size)
626 return (0);
627
628 /*
629 * Limit the read to the remaining file size.
630 * Do this by temporarily reducing uio_resid
631 * by the amount the lies beyoned the EOF.
632 */
633 if (endoff > va.va_size) {
634 past_eof = (ssize_t)(endoff - va.va_size);
635 uiop->uio_resid -= past_eof;
636 } else
637 past_eof = 0;
638
639 /* Shared lock for n_fid use in smb_rwuio */
640 if (smbfs_rw_enter_sig(&np->r_lkserlock, RW_READER, SMBINTR(vp)))
641 return (EINTR);
642 smb_credinit(&scred, cr);
643
644 /* After reconnect, n_fid is invalid */
645 if (np->n_vcgenid != ssp->ss_vcgenid)
646 error = ESTALE;
647 else
648 error = smb_rwuio(ssp, np->n_fid, UIO_READ,
649 uiop, &scred, smb_timo_read);
650
651 smb_credrele(&scred);
652 smbfs_rw_exit(&np->r_lkserlock);
653
654 /* undo adjustment of resid */
655 uiop->uio_resid += past_eof;
656
657 return (error);
658 }
659
660
661 /* ARGSUSED */
662 static int
663 smbfs_write(vnode_t *vp, struct uio *uiop, int ioflag, cred_t *cr,
664 caller_context_t *ct)
665 {
666 struct smb_cred scred;
667 struct vattr va;
668 smbnode_t *np;
669 smbmntinfo_t *smi;
670 smb_share_t *ssp;
671 offset_t endoff, limit;
672 ssize_t past_limit;
673 int error, timo;
674
675 np = VTOSMB(vp);
676 smi = VTOSMI(vp);
677 ssp = smi->smi_share;
678
679 if (curproc->p_zone != smi->smi_zone_ref.zref_zone)
680 return (EIO);
681
682 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED)
683 return (EIO);
684
685 ASSERT(smbfs_rw_lock_held(&np->r_rwlock, RW_WRITER));
686
687 if (vp->v_type != VREG)
688 return (EISDIR);
689
690 if (uiop->uio_resid == 0)
691 return (0);
692
693 /*
694 * Handle ioflag bits: (FAPPEND|FSYNC|FDSYNC)
695 */
696 if (ioflag & (FAPPEND | FSYNC)) {
697 if (np->n_flag & NMODIFIED) {
698 smbfs_attrcache_remove(np);
699 /* XXX: smbfs_vinvalbuf? */
700 }
701 }
702 if (ioflag & FAPPEND) {
703 /*
704 * File size can be changed by another client
705 */
706 va.va_mask = AT_SIZE;
707 if (error = smbfsgetattr(vp, &va, cr))
708 return (error);
709 uiop->uio_loffset = va.va_size;
710 }
711
712 /*
713 * Like NFS3, just check for 63-bit overflow.
714 */
715 endoff = uiop->uio_loffset + uiop->uio_resid;
716 if (uiop->uio_loffset < 0 || endoff < 0)
717 return (EINVAL);
718
719 /*
720 * Check to make sure that the process will not exceed
721 * its limit on file size. It is okay to write up to
722 * the limit, but not beyond. Thus, the write which
723 * reaches the limit will be short and the next write
724 * will return an error.
725 *
726 * So if we're starting at or beyond the limit, EFBIG.
727 * Otherwise, temporarily reduce resid to the amount
728 * the falls after the limit.
729 */
730 limit = uiop->uio_llimit;
731 if (limit == RLIM64_INFINITY || limit > MAXOFFSET_T)
732 limit = MAXOFFSET_T;
733 if (uiop->uio_loffset >= limit)
734 return (EFBIG);
735 if (endoff > limit) {
736 past_limit = (ssize_t)(endoff - limit);
737 uiop->uio_resid -= past_limit;
738 } else
739 past_limit = 0;
740
741 /* Timeout: longer for append. */
742 timo = smb_timo_write;
743 if (endoff > np->r_size)
744 timo = smb_timo_append;
745
746 /* Shared lock for n_fid use in smb_rwuio */
747 if (smbfs_rw_enter_sig(&np->r_lkserlock, RW_READER, SMBINTR(vp)))
748 return (EINTR);
749 smb_credinit(&scred, cr);
750
751 /* After reconnect, n_fid is invalid */
752 if (np->n_vcgenid != ssp->ss_vcgenid)
753 error = ESTALE;
754 else
755 error = smb_rwuio(ssp, np->n_fid, UIO_WRITE,
756 uiop, &scred, timo);
757
758 if (error == 0) {
759 mutex_enter(&np->r_statelock);
760 np->n_flag |= (NFLUSHWIRE | NATTRCHANGED);
761 if (uiop->uio_loffset > (offset_t)np->r_size)
762 np->r_size = (len_t)uiop->uio_loffset;
763 mutex_exit(&np->r_statelock);
764 if (ioflag & (FSYNC|FDSYNC)) {
765 /* Don't error the I/O if this fails. */
766 (void) smbfs_smb_flush(np, &scred);
767 }
768 }
769
770 smb_credrele(&scred);
771 smbfs_rw_exit(&np->r_lkserlock);
772
773 /* undo adjustment of resid */
774 uiop->uio_resid += past_limit;
775
776 return (error);
777 }
778
779
780 /* ARGSUSED */
781 static int
782 smbfs_ioctl(vnode_t *vp, int cmd, intptr_t arg, int flag,
783 cred_t *cr, int *rvalp, caller_context_t *ct)
784 {
785 int error;
786 smbmntinfo_t *smi;
787
788 smi = VTOSMI(vp);
789
790 if (curproc->p_zone != smi->smi_zone_ref.zref_zone)
791 return (EIO);
792
793 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED)
794 return (EIO);
795
796 switch (cmd) {
797 /* First three from ZFS. XXX - need these? */
798
799 case _FIOFFS:
800 error = smbfs_fsync(vp, 0, cr, ct);
801 break;
802
803 /*
804 * The following two ioctls are used by bfu.
805 * Silently ignore to avoid bfu errors.
806 */
807 case _FIOGDIO:
808 case _FIOSDIO:
809 error = 0;
810 break;
811
812 #ifdef NOT_YET /* XXX - from the NFS code. */
813 case _FIODIRECTIO:
814 error = smbfs_directio(vp, (int)arg, cr);
815 #endif
816
817 /*
818 * Allow get/set with "raw" security descriptor (SD) data.
819 * Useful for testing, diagnosing idmap problems, etc.
820 */
821 case SMBFSIO_GETSD:
822 error = smbfs_acl_iocget(vp, arg, flag, cr);
823 break;
824
825 case SMBFSIO_SETSD:
826 error = smbfs_acl_iocset(vp, arg, flag, cr);
827 break;
828
829 default:
830 error = ENOTTY;
831 break;
832 }
833
834 return (error);
835 }
836
837
838 /*
839 * Return either cached or remote attributes. If get remote attr
840 * use them to check and invalidate caches, then cache the new attributes.
841 *
842 * XXX
843 * This op should eventually support PSARC 2007/315, Extensible Attribute
844 * Interfaces, for richer metadata.
845 */
846 /* ARGSUSED */
847 static int
848 smbfs_getattr(vnode_t *vp, struct vattr *vap, int flags, cred_t *cr,
849 caller_context_t *ct)
850 {
851 smbnode_t *np;
852 smbmntinfo_t *smi;
853
854 smi = VTOSMI(vp);
855
856 if (curproc->p_zone != smi->smi_zone_ref.zref_zone)
857 return (EIO);
858
859 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED)
860 return (EIO);
861
862 /*
863 * If it has been specified that the return value will
864 * just be used as a hint, and we are only being asked
865 * for size, fsid or rdevid, then return the client's
866 * notion of these values without checking to make sure
867 * that the attribute cache is up to date.
868 * The whole point is to avoid an over the wire GETATTR
869 * call.
870 */
871 np = VTOSMB(vp);
872 if (flags & ATTR_HINT) {
873 if (vap->va_mask ==
874 (vap->va_mask & (AT_SIZE | AT_FSID | AT_RDEV))) {
875 mutex_enter(&np->r_statelock);
876 if (vap->va_mask | AT_SIZE)
877 vap->va_size = np->r_size;
878 if (vap->va_mask | AT_FSID)
879 vap->va_fsid = vp->v_vfsp->vfs_dev;
880 if (vap->va_mask | AT_RDEV)
881 vap->va_rdev = vp->v_rdev;
882 mutex_exit(&np->r_statelock);
883 return (0);
884 }
885 }
886
887 return (smbfsgetattr(vp, vap, cr));
888 }
889
890 /* smbfsgetattr() in smbfs_client.c */
891
892 /*
893 * XXX
894 * This op should eventually support PSARC 2007/315, Extensible Attribute
895 * Interfaces, for richer metadata.
896 */
897 /*ARGSUSED4*/
898 static int
899 smbfs_setattr(vnode_t *vp, struct vattr *vap, int flags, cred_t *cr,
900 caller_context_t *ct)
901 {
902 vfs_t *vfsp;
903 smbmntinfo_t *smi;
904 int error;
905 uint_t mask;
906 struct vattr oldva;
907
908 vfsp = vp->v_vfsp;
909 smi = VFTOSMI(vfsp);
910
911 if (curproc->p_zone != smi->smi_zone_ref.zref_zone)
912 return (EIO);
913
914 if (smi->smi_flags & SMI_DEAD || vfsp->vfs_flag & VFS_UNMOUNTED)
915 return (EIO);
916
917 mask = vap->va_mask;
918 if (mask & AT_NOSET)
919 return (EINVAL);
920
921 if (vfsp->vfs_flag & VFS_RDONLY)
922 return (EROFS);
923
924 /*
925 * This is a _local_ access check so that only the owner of
926 * this mount can set attributes. With ACLs enabled, the
927 * file owner can be different from the mount owner, and we
928 * need to check the _mount_ owner here. See _access_rwx
929 */
930 bzero(&oldva, sizeof (oldva));
931 oldva.va_mask = AT_TYPE | AT_MODE;
932 error = smbfsgetattr(vp, &oldva, cr);
933 if (error)
934 return (error);
935 oldva.va_mask |= AT_UID | AT_GID;
936 oldva.va_uid = smi->smi_uid;
937 oldva.va_gid = smi->smi_gid;
938
939 error = secpolicy_vnode_setattr(cr, vp, vap, &oldva, flags,
940 smbfs_accessx, vp);
941 if (error)
942 return (error);
943
944 if (mask & (AT_UID | AT_GID)) {
945 if (smi->smi_flags & SMI_ACL)
946 error = smbfs_acl_setids(vp, vap, cr);
947 else
948 error = ENOSYS;
949 if (error != 0) {
950 SMBVDEBUG("error %d seting UID/GID on %s",
951 error, VTOSMB(vp)->n_rpath);
952 /*
953 * It might be more correct to return the
954 * error here, but that causes complaints
955 * when root extracts a cpio archive, etc.
956 * So ignore this error, and go ahead with
957 * the rest of the setattr work.
958 */
959 }
960 }
961
962 return (smbfssetattr(vp, vap, flags, cr));
963 }
964
965 /*
966 * Mostly from Darwin smbfs_setattr()
967 * but then modified a lot.
968 */
969 /* ARGSUSED */
970 static int
971 smbfssetattr(vnode_t *vp, struct vattr *vap, int flags, cred_t *cr)
972 {
973 int error = 0;
974 smbnode_t *np = VTOSMB(vp);
975 uint_t mask = vap->va_mask;
976 struct timespec *mtime, *atime;
977 struct smb_cred scred;
978 int cerror, modified = 0;
979 unsigned short fid;
980 int have_fid = 0;
981 uint32_t rights = 0;
982
983 ASSERT(curproc->p_zone == VTOSMI(vp)->smi_zone_ref.zref_zone);
984
985 /*
986 * There are no settable attributes on the XATTR dir,
987 * so just silently ignore these. On XATTR files,
988 * you can set the size but nothing else.
989 */
990 if (vp->v_flag & V_XATTRDIR)
991 return (0);
992 if (np->n_flag & N_XATTR) {
993 if (mask & AT_TIMES)
994 SMBVDEBUG("ignore set time on xattr\n");
995 mask &= AT_SIZE;
996 }
997
998 /*
999 * If our caller is trying to set multiple attributes, they
1000 * can make no assumption about what order they are done in.
1001 * Here we try to do them in order of decreasing likelihood
1002 * of failure, just to minimize the chance we'll wind up
1003 * with a partially complete request.
1004 */
1005
1006 /* Shared lock for (possible) n_fid use. */
1007 if (smbfs_rw_enter_sig(&np->r_lkserlock, RW_READER, SMBINTR(vp)))
1008 return (EINTR);
1009 smb_credinit(&scred, cr);
1010
1011 /*
1012 * Will we need an open handle for this setattr?
1013 * If so, what rights will we need?
1014 */
1015 if (mask & (AT_ATIME | AT_MTIME)) {
1016 rights |=
1017 SA_RIGHT_FILE_WRITE_ATTRIBUTES;
1018 }
1019 if (mask & AT_SIZE) {
1020 rights |=
1021 SA_RIGHT_FILE_WRITE_DATA |
1022 SA_RIGHT_FILE_APPEND_DATA;
1023 }
1024
1025 /*
1026 * Only SIZE really requires a handle, but it's
1027 * simpler and more reliable to set via a handle.
1028 * Some servers like NT4 won't set times by path.
1029 * Also, we're usually setting everything anyway.
1030 */
1031 if (mask & (AT_SIZE | AT_ATIME | AT_MTIME)) {
1032 error = smbfs_smb_tmpopen(np, rights, &scred, &fid);
1033 if (error) {
1034 SMBVDEBUG("error %d opening %s\n",
1035 error, np->n_rpath);
1036 goto out;
1037 }
1038 have_fid = 1;
1039 }
1040
1041 /*
1042 * If the server supports the UNIX extensions, right here is where
1043 * we'd support changes to uid, gid, mode, and possibly va_flags.
1044 * For now we claim to have made any such changes.
1045 */
1046
1047 if (mask & AT_SIZE) {
1048 /*
1049 * If the new file size is less than what the client sees as
1050 * the file size, then just change the size and invalidate
1051 * the pages.
1052 * I am commenting this code at present because the function
1053 * smbfs_putapage() is not yet implemented.
1054 */
1055
1056 /*
1057 * Set the file size to vap->va_size.
1058 */
1059 ASSERT(have_fid);
1060 error = smbfs_smb_setfsize(np, fid, vap->va_size, &scred);
1061 if (error) {
1062 SMBVDEBUG("setsize error %d file %s\n",
1063 error, np->n_rpath);
1064 } else {
1065 /*
1066 * Darwin had code here to zero-extend.
1067 * Tests indicate the server will zero-fill,
1068 * so looks like we don't need to do this.
1069 * Good thing, as this could take forever.
1070 *
1071 * XXX: Reportedly, writing one byte of zero
1072 * at the end offset avoids problems here.
1073 */
1074 mutex_enter(&np->r_statelock);
1075 np->r_size = vap->va_size;
1076 mutex_exit(&np->r_statelock);
1077 modified = 1;
1078 }
1079 }
1080
1081 /*
1082 * XXX: When Solaris has create_time, set that too.
1083 * Note: create_time is different from ctime.
1084 */
1085 mtime = ((mask & AT_MTIME) ? &vap->va_mtime : 0);
1086 atime = ((mask & AT_ATIME) ? &vap->va_atime : 0);
1087
1088 if (mtime || atime) {
1089 /*
1090 * Always use the handle-based set attr call now.
1091 * Not trying to set DOS attributes here so pass zero.
1092 */
1093 ASSERT(have_fid);
1094 error = smbfs_smb_setfattr(np, fid,
1095 0, mtime, atime, &scred);
1096 if (error) {
1097 SMBVDEBUG("set times error %d file %s\n",
1098 error, np->n_rpath);
1099 } else {
1100 modified = 1;
1101 }
1102 }
1103
1104 out:
1105 if (modified) {
1106 /*
1107 * Invalidate attribute cache in case the server
1108 * doesn't set exactly the attributes we asked.
1109 */
1110 smbfs_attrcache_remove(np);
1111 }
1112
1113 if (have_fid) {
1114 cerror = smbfs_smb_tmpclose(np, fid, &scred);
1115 if (cerror)
1116 SMBVDEBUG("error %d closing %s\n",
1117 cerror, np->n_rpath);
1118 }
1119
1120 smb_credrele(&scred);
1121 smbfs_rw_exit(&np->r_lkserlock);
1122
1123 return (error);
1124 }
1125
1126 /*
1127 * smbfs_access_rwx()
1128 * Common function for smbfs_access, etc.
1129 *
1130 * The security model implemented by the FS is unusual
1131 * due to the current "single user mounts" restriction:
1132 * All access under a given mount point uses the CIFS
1133 * credentials established by the owner of the mount.
1134 *
1135 * Most access checking is handled by the CIFS server,
1136 * but we need sufficient Unix access checks here to
1137 * prevent other local Unix users from having access
1138 * to objects under this mount that the uid/gid/mode
1139 * settings in the mount would not allow.
1140 *
1141 * With this model, there is a case where we need the
1142 * ability to do an access check before we have the
1143 * vnode for an object. This function takes advantage
1144 * of the fact that the uid/gid/mode is per mount, and
1145 * avoids the need for a vnode.
1146 *
1147 * We still (sort of) need a vnode when we call
1148 * secpolicy_vnode_access, but that only uses
1149 * the vtype field, so we can use a pair of fake
1150 * vnodes that have only v_type filled in.
1151 *
1152 * XXX: Later, add a new secpolicy_vtype_access()
1153 * that takes the vtype instead of a vnode, and
1154 * get rid of the tmpl_vxxx fake vnodes below.
1155 */
1156 static int
1157 smbfs_access_rwx(vfs_t *vfsp, int vtype, int mode, cred_t *cr)
1158 {
1159 /* See the secpolicy call below. */
1160 static const vnode_t tmpl_vdir = { .v_type = VDIR };
1161 static const vnode_t tmpl_vreg = { .v_type = VREG };
1162 vattr_t va;
1163 vnode_t *tvp;
1164 struct smbmntinfo *smi = VFTOSMI(vfsp);
1165 int shift = 0;
1166
1167 /*
1168 * Build our (fabricated) vnode attributes.
1169 * XXX: Could make these templates in the
1170 * per-mount struct and use them here.
1171 */
1172 bzero(&va, sizeof (va));
1173 va.va_mask = AT_TYPE | AT_MODE | AT_UID | AT_GID;
1174 va.va_type = vtype;
1175 va.va_mode = (vtype == VDIR) ?
1176 smi->smi_dmode : smi->smi_fmode;
1177 va.va_uid = smi->smi_uid;
1178 va.va_gid = smi->smi_gid;
1179
1180 /*
1181 * Disallow write attempts on read-only file systems,
1182 * unless the file is a device or fifo node. Note:
1183 * Inline vn_is_readonly and IS_DEVVP here because
1184 * we may not have a vnode ptr. Original expr. was:
1185 * (mode & VWRITE) && vn_is_readonly(vp) && !IS_DEVVP(vp))
1186 */
1187 if ((mode & VWRITE) &&
1188 (vfsp->vfs_flag & VFS_RDONLY) &&
1189 !(vtype == VCHR || vtype == VBLK || vtype == VFIFO))
1190 return (EROFS);
1191
1192 /*
1193 * Disallow attempts to access mandatory lock files.
1194 * Similarly, expand MANDLOCK here.
1195 * XXX: not sure we need this.
1196 */
1197 if ((mode & (VWRITE | VREAD | VEXEC)) &&
1198 va.va_type == VREG && MANDMODE(va.va_mode))
1199 return (EACCES);
1200
1201 /*
1202 * Access check is based on only
1203 * one of owner, group, public.
1204 * If not owner, then check group.
1205 * If not a member of the group,
1206 * then check public access.
1207 */
1208 if (crgetuid(cr) != va.va_uid) {
1209 shift += 3;
1210 if (!groupmember(va.va_gid, cr))
1211 shift += 3;
1212 }
1213
1214 /*
1215 * We need a vnode for secpolicy_vnode_access,
1216 * but the only thing it looks at is v_type,
1217 * so pass one of the templates above.
1218 */
1219 tvp = (va.va_type == VDIR) ?
1220 (vnode_t *)&tmpl_vdir :
1221 (vnode_t *)&tmpl_vreg;
1222
1223 return (secpolicy_vnode_access2(cr, tvp, va.va_uid,
1224 va.va_mode << shift, mode));
1225 }
1226
1227 /*
1228 * See smbfs_setattr
1229 */
1230 static int
1231 smbfs_accessx(void *arg, int mode, cred_t *cr)
1232 {
1233 vnode_t *vp = arg;
1234 /*
1235 * Note: The caller has checked the current zone,
1236 * the SMI_DEAD and VFS_UNMOUNTED flags, etc.
1237 */
1238 return (smbfs_access_rwx(vp->v_vfsp, vp->v_type, mode, cr));
1239 }
1240
1241 /*
1242 * XXX
1243 * This op should support PSARC 2007/403, Modified Access Checks for CIFS
1244 */
1245 /* ARGSUSED */
1246 static int
1247 smbfs_access(vnode_t *vp, int mode, int flags, cred_t *cr, caller_context_t *ct)
1248 {
1249 vfs_t *vfsp;
1250 smbmntinfo_t *smi;
1251
1252 vfsp = vp->v_vfsp;
1253 smi = VFTOSMI(vfsp);
1254
1255 if (curproc->p_zone != smi->smi_zone_ref.zref_zone)
1256 return (EIO);
1257
1258 if (smi->smi_flags & SMI_DEAD || vfsp->vfs_flag & VFS_UNMOUNTED)
1259 return (EIO);
1260
1261 return (smbfs_access_rwx(vfsp, vp->v_type, mode, cr));
1262 }
1263
1264
1265 /*
1266 * Flush local dirty pages to stable storage on the server.
1267 *
1268 * If FNODSYNC is specified, then there is nothing to do because
1269 * metadata changes are not cached on the client before being
1270 * sent to the server.
1271 */
1272 /* ARGSUSED */
1273 static int
1274 smbfs_fsync(vnode_t *vp, int syncflag, cred_t *cr, caller_context_t *ct)
1275 {
1276 int error = 0;
1277 smbmntinfo_t *smi;
1278 smbnode_t *np;
1279 struct smb_cred scred;
1280
1281 np = VTOSMB(vp);
1282 smi = VTOSMI(vp);
1283
1284 if (curproc->p_zone != smi->smi_zone_ref.zref_zone)
1285 return (EIO);
1286
1287 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED)
1288 return (EIO);
1289
1290 if ((syncflag & FNODSYNC) || IS_SWAPVP(vp))
1291 return (0);
1292
1293 if ((syncflag & (FSYNC|FDSYNC)) == 0)
1294 return (0);
1295
1296 /* Shared lock for n_fid use in _flush */
1297 if (smbfs_rw_enter_sig(&np->r_lkserlock, RW_READER, SMBINTR(vp)))
1298 return (EINTR);
1299 smb_credinit(&scred, cr);
1300
1301 error = smbfs_smb_flush(np, &scred);
1302
1303 smb_credrele(&scred);
1304 smbfs_rw_exit(&np->r_lkserlock);
1305
1306 return (error);
1307 }
1308
1309 /*
1310 * Last reference to vnode went away.
1311 */
1312 /* ARGSUSED */
1313 static void
1314 smbfs_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct)
1315 {
1316 smbnode_t *np;
1317 struct smb_cred scred;
1318
1319 /*
1320 * Don't "bail out" for VFS_UNMOUNTED here,
1321 * as we want to do cleanup, etc.
1322 * See also pcfs_inactive
1323 */
1324
1325 np = VTOSMB(vp);
1326
1327 /*
1328 * If this is coming from the wrong zone, we let someone in the right
1329 * zone take care of it asynchronously. We can get here due to
1330 * VN_RELE() being called from pageout() or fsflush(). This call may
1331 * potentially turn into an expensive no-op if, for instance, v_count
1332 * gets incremented in the meantime, but it's still correct.
1333 */
1334
1335 /*
1336 * Defend against the possibility that higher-level callers
1337 * might not correctly balance open and close calls. If we
1338 * get here with open references remaining, it means there
1339 * was a missing VOP_CLOSE somewhere. If that happens, do
1340 * the close here so we don't "leak" FIDs on the server.
1341 *
1342 * Exclusive lock for modifying n_fid stuff.
1343 * Don't want this one ever interruptible.
1344 */
1345 (void) smbfs_rw_enter_sig(&np->r_lkserlock, RW_WRITER, 0);
1346 smb_credinit(&scred, cr);
1347
1348 switch (np->n_ovtype) {
1349 case VNON:
1350 /* not open (OK) */
1351 break;
1352
1353 case VDIR:
1354 if (np->n_dirrefs == 0)
1355 break;
1356 SMBVDEBUG("open dir: refs %d path %s\n",
1357 np->n_dirrefs, np->n_rpath);
1358 /* Force last close. */
1359 np->n_dirrefs = 1;
1360 smbfs_rele_fid(np, &scred);
1361 break;
1362
1363 case VREG:
1364 if (np->n_fidrefs == 0)
1365 break;
1366 SMBVDEBUG("open file: refs %d id 0x%x path %s\n",
1367 np->n_fidrefs, np->n_fid, np->n_rpath);
1368 /* Force last close. */
1369 np->n_fidrefs = 1;
1370 smbfs_rele_fid(np, &scred);
1371 break;
1372
1373 default:
1374 SMBVDEBUG("bad n_ovtype %d\n", np->n_ovtype);
1375 np->n_ovtype = VNON;
1376 break;
1377 }
1378
1379 smb_credrele(&scred);
1380 smbfs_rw_exit(&np->r_lkserlock);
1381
1382 smbfs_addfree(np);
1383 }
1384
1385 /*
1386 * Remote file system operations having to do with directory manipulation.
1387 */
1388 /* ARGSUSED */
1389 static int
1390 smbfs_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, struct pathname *pnp,
1391 int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct,
1392 int *direntflags, pathname_t *realpnp)
1393 {
1394 vfs_t *vfs;
1395 smbmntinfo_t *smi;
1396 smbnode_t *dnp;
1397 int error;
1398
1399 vfs = dvp->v_vfsp;
1400 smi = VFTOSMI(vfs);
1401
1402 if (curproc->p_zone != smi->smi_zone_ref.zref_zone)
1403 return (EPERM);
1404
1405 if (smi->smi_flags & SMI_DEAD || vfs->vfs_flag & VFS_UNMOUNTED)
1406 return (EIO);
1407
1408 dnp = VTOSMB(dvp);
1409
1410 /*
1411 * Are we looking up extended attributes? If so, "dvp" is
1412 * the file or directory for which we want attributes, and
1413 * we need a lookup of the (faked up) attribute directory
1414 * before we lookup the rest of the path.
1415 */
1416 if (flags & LOOKUP_XATTR) {
1417 /*
1418 * Require the xattr mount option.
1419 */
1420 if ((vfs->vfs_flag & VFS_XATTR) == 0)
1421 return (EINVAL);
1422
1423 error = smbfs_get_xattrdir(dvp, vpp, cr, flags);
1424 return (error);
1425 }
1426
1427 if (smbfs_rw_enter_sig(&dnp->r_rwlock, RW_READER, SMBINTR(dvp)))
1428 return (EINTR);
1429
1430 error = smbfslookup(dvp, nm, vpp, cr, 1, ct);
1431
1432 smbfs_rw_exit(&dnp->r_rwlock);
1433
1434 return (error);
1435 }
1436
1437 /* ARGSUSED */
1438 static int
1439 smbfslookup(vnode_t *dvp, char *nm, vnode_t **vpp, cred_t *cr,
1440 int cache_ok, caller_context_t *ct)
1441 {
1442 int error;
1443 int supplen; /* supported length */
1444 vnode_t *vp;
1445 smbnode_t *np;
1446 smbnode_t *dnp;
1447 smbmntinfo_t *smi;
1448 /* struct smb_vc *vcp; */
1449 const char *ill;
1450 const char *name = (const char *)nm;
1451 int nmlen = strlen(nm);
1452 int rplen;
1453 struct smb_cred scred;
1454 struct smbfattr fa;
1455
1456 smi = VTOSMI(dvp);
1457 dnp = VTOSMB(dvp);
1458
1459 ASSERT(curproc->p_zone == smi->smi_zone_ref.zref_zone);
1460
1461 #ifdef NOT_YET
1462 vcp = SSTOVC(smi->smi_share);
1463
1464 /* XXX: Should compute this once and store it in smbmntinfo_t */
1465 supplen = (SMB_DIALECT(vcp) >= SMB_DIALECT_LANMAN2_0) ? 255 : 12;
1466 #else
1467 supplen = 255;
1468 #endif
1469
1470 /*
1471 * RWlock must be held, either reader or writer.
1472 * XXX: Can we check without looking directly
1473 * inside the struct smbfs_rwlock_t?
1474 */
1475 ASSERT(dnp->r_rwlock.count != 0);
1476
1477 /*
1478 * If lookup is for "", just return dvp.
1479 * No need to perform any access checks.
1480 */
1481 if (nmlen == 0) {
1482 VN_HOLD(dvp);
1483 *vpp = dvp;
1484 return (0);
1485 }
1486
1487 /*
1488 * Can't do lookups in non-directories.
1489 */
1490 if (dvp->v_type != VDIR)
1491 return (ENOTDIR);
1492
1493 /*
1494 * Need search permission in the directory.
1495 */
1496 error = smbfs_access(dvp, VEXEC, 0, cr, ct);
1497 if (error)
1498 return (error);
1499
1500 /*
1501 * If lookup is for ".", just return dvp.
1502 * Access check was done above.
1503 */
1504 if (nmlen == 1 && name[0] == '.') {
1505 VN_HOLD(dvp);
1506 *vpp = dvp;
1507 return (0);
1508 }
1509
1510 /*
1511 * Now some sanity checks on the name.
1512 * First check the length.
1513 */
1514 if (nmlen > supplen)
1515 return (ENAMETOOLONG);
1516
1517 /*
1518 * Avoid surprises with characters that are
1519 * illegal in Windows file names.
1520 * Todo: CATIA mappings XXX
1521 */
1522 ill = illegal_chars;
1523 if (dnp->n_flag & N_XATTR)
1524 ill++; /* allow colon */
1525 if (strpbrk(nm, ill))
1526 return (EINVAL);
1527
1528 /*
1529 * Special handling for lookup of ".."
1530 *
1531 * We keep full pathnames (as seen on the server)
1532 * so we can just trim off the last component to
1533 * get the full pathname of the parent. Note:
1534 * We don't actually copy and modify, but just
1535 * compute the trimmed length and pass that with
1536 * the current dir path (not null terminated).
1537 *
1538 * We don't go over-the-wire to get attributes
1539 * for ".." because we know it's a directory,
1540 * and we can just leave the rest "stale"
1541 * until someone does a getattr.
1542 */
1543 if (nmlen == 2 && name[0] == '.' && name[1] == '.') {
1544 if (dvp->v_flag & VROOT) {
1545 /*
1546 * Already at the root. This can happen
1547 * with directory listings at the root,
1548 * which lookup "." and ".." to get the
1549 * inode numbers. Let ".." be the same
1550 * as "." in the FS root.
1551 */
1552 VN_HOLD(dvp);
1553 *vpp = dvp;
1554 return (0);
1555 }
1556
1557 /*
1558 * Special case for XATTR directory
1559 */
1560 if (dvp->v_flag & V_XATTRDIR) {
1561 error = smbfs_xa_parent(dvp, vpp);
1562 return (error);
1563 }
1564
1565 /*
1566 * Find the parent path length.
1567 */
1568 rplen = dnp->n_rplen;
1569 ASSERT(rplen > 0);
1570 while (--rplen >= 0) {
1571 if (dnp->n_rpath[rplen] == '\\')
1572 break;
1573 }
1574 if (rplen <= 0) {
1575 /* Found our way to the root. */
1576 vp = SMBTOV(smi->smi_root);
1577 VN_HOLD(vp);
1578 *vpp = vp;
1579 return (0);
1580 }
1581 np = smbfs_node_findcreate(smi,
1582 dnp->n_rpath, rplen, NULL, 0, 0,
1583 &smbfs_fattr0); /* force create */
1584 ASSERT(np != NULL);
1585 vp = SMBTOV(np);
1586 vp->v_type = VDIR;
1587
1588 /* Success! */
1589 *vpp = vp;
1590 return (0);
1591 }
1592
1593 /*
1594 * Normal lookup of a name under this directory.
1595 * Note we handled "", ".", ".." above.
1596 */
1597 if (cache_ok) {
1598 /*
1599 * The caller indicated that it's OK to use a
1600 * cached result for this lookup, so try to
1601 * reclaim a node from the smbfs node cache.
1602 */
1603 error = smbfslookup_cache(dvp, nm, nmlen, &vp, cr);
1604 if (error)
1605 return (error);
1606 if (vp != NULL) {
1607 /* hold taken in lookup_cache */
1608 *vpp = vp;
1609 return (0);
1610 }
1611 }
1612
1613 /*
1614 * OK, go over-the-wire to get the attributes,
1615 * then create the node.
1616 */
1617 smb_credinit(&scred, cr);
1618 /* Note: this can allocate a new "name" */
1619 error = smbfs_smb_lookup(dnp, &name, &nmlen, &fa, &scred);
1620 smb_credrele(&scred);
1621 if (error == ENOTDIR) {
1622 /*
1623 * Lookup failed because this directory was
1624 * removed or renamed by another client.
1625 * Remove any cached attributes under it.
1626 */
1627 smbfs_attrcache_remove(dnp);
1628 smbfs_attrcache_prune(dnp);
1629 }
1630 if (error)
1631 goto out;
1632
1633 error = smbfs_nget(dvp, name, nmlen, &fa, &vp);
1634 if (error)
1635 goto out;
1636
1637 /* Success! */
1638 *vpp = vp;
1639
1640 out:
1641 /* smbfs_smb_lookup may have allocated name. */
1642 if (name != nm)
1643 smbfs_name_free(name, nmlen);
1644
1645 return (error);
1646 }
1647
1648 /*
1649 * smbfslookup_cache
1650 *
1651 * Try to reclaim a node from the smbfs node cache.
1652 * Some statistics for DEBUG.
1653 *
1654 * This mechanism lets us avoid many of the five (or more)
1655 * OtW lookup calls per file seen with "ls -l" if we search
1656 * the smbfs node cache for recently inactive(ated) nodes.
1657 */
1658 #ifdef DEBUG
1659 int smbfs_lookup_cache_calls = 0;
1660 int smbfs_lookup_cache_error = 0;
1661 int smbfs_lookup_cache_miss = 0;
1662 int smbfs_lookup_cache_stale = 0;
1663 int smbfs_lookup_cache_hits = 0;
1664 #endif /* DEBUG */
1665
1666 /* ARGSUSED */
1667 static int
1668 smbfslookup_cache(vnode_t *dvp, char *nm, int nmlen,
1669 vnode_t **vpp, cred_t *cr)
1670 {
1671 struct vattr va;
1672 smbnode_t *dnp;
1673 smbnode_t *np;
1674 vnode_t *vp;
1675 int error;
1676 char sep;
1677
1678 dnp = VTOSMB(dvp);
1679 *vpp = NULL;
1680
1681 #ifdef DEBUG
1682 smbfs_lookup_cache_calls++;
1683 #endif
1684
1685 /*
1686 * First make sure we can get attributes for the
1687 * directory. Cached attributes are OK here.
1688 * If we removed or renamed the directory, this
1689 * will return ENOENT. If someone else removed
1690 * this directory or file, we'll find out when we
1691 * try to open or get attributes.
1692 */
1693 va.va_mask = AT_TYPE | AT_MODE;
1694 error = smbfsgetattr(dvp, &va, cr);
1695 if (error) {
1696 #ifdef DEBUG
1697 smbfs_lookup_cache_error++;
1698 #endif
1699 return (error);
1700 }
1701
1702 /*
1703 * Passing NULL smbfattr here so we will
1704 * just look, not create.
1705 */
1706 sep = SMBFS_DNP_SEP(dnp);
1707 np = smbfs_node_findcreate(dnp->n_mount,
1708 dnp->n_rpath, dnp->n_rplen,
1709 nm, nmlen, sep, NULL);
1710 if (np == NULL) {
1711 #ifdef DEBUG
1712 smbfs_lookup_cache_miss++;
1713 #endif
1714 return (0);
1715 }
1716
1717 /*
1718 * Found it. Attributes still valid?
1719 */
1720 vp = SMBTOV(np);
1721 if (np->r_attrtime <= gethrtime()) {
1722 /* stale */
1723 #ifdef DEBUG
1724 smbfs_lookup_cache_stale++;
1725 #endif
1726 VN_RELE(vp);
1727 return (0);
1728 }
1729
1730 /*
1731 * Success!
1732 * Caller gets hold from smbfs_node_findcreate
1733 */
1734 #ifdef DEBUG
1735 smbfs_lookup_cache_hits++;
1736 #endif
1737 *vpp = vp;
1738 return (0);
1739 }
1740
1741 /*
1742 * XXX
1743 * vsecattr_t is new to build 77, and we need to eventually support
1744 * it in order to create an ACL when an object is created.
1745 *
1746 * This op should support the new FIGNORECASE flag for case-insensitive
1747 * lookups, per PSARC 2007/244.
1748 */
1749 /* ARGSUSED */
1750 static int
1751 smbfs_create(vnode_t *dvp, char *nm, struct vattr *va, enum vcexcl exclusive,
1752 int mode, vnode_t **vpp, cred_t *cr, int lfaware, caller_context_t *ct,
1753 vsecattr_t *vsecp)
1754 {
1755 int error;
1756 int cerror;
1757 vfs_t *vfsp;
1758 vnode_t *vp;
1759 #ifdef NOT_YET
1760 smbnode_t *np;
1761 #endif
1762 smbnode_t *dnp;
1763 smbmntinfo_t *smi;
1764 struct vattr vattr;
1765 struct smbfattr fattr;
1766 struct smb_cred scred;
1767 const char *name = (const char *)nm;
1768 int nmlen = strlen(nm);
1769 uint32_t disp;
1770 uint16_t fid;
1771 int xattr;
1772
1773 vfsp = dvp->v_vfsp;
1774 smi = VFTOSMI(vfsp);
1775 dnp = VTOSMB(dvp);
1776 vp = NULL;
1777
1778 if (curproc->p_zone != smi->smi_zone_ref.zref_zone)
1779 return (EPERM);
1780
1781 if (smi->smi_flags & SMI_DEAD || vfsp->vfs_flag & VFS_UNMOUNTED)
1782 return (EIO);
1783
1784 /*
1785 * Note: this may break mknod(2) calls to create a directory,
1786 * but that's obscure use. Some other filesystems do this.
1787 * XXX: Later, redirect VDIR type here to _mkdir.
1788 */
1789 if (va->va_type != VREG)
1790 return (EINVAL);
1791
1792 /*
1793 * If the pathname is "", just use dvp, no checks.
1794 * Do this outside of the rwlock (like zfs).
1795 */
1796 if (nmlen == 0) {
1797 VN_HOLD(dvp);
1798 *vpp = dvp;
1799 return (0);
1800 }
1801
1802 /* Don't allow "." or ".." through here. */
1803 if ((nmlen == 1 && name[0] == '.') ||
1804 (nmlen == 2 && name[0] == '.' && name[1] == '.'))
1805 return (EISDIR);
1806
1807 /*
1808 * We make a copy of the attributes because the caller does not
1809 * expect us to change what va points to.
1810 */
1811 vattr = *va;
1812
1813 if (smbfs_rw_enter_sig(&dnp->r_rwlock, RW_WRITER, SMBINTR(dvp)))
1814 return (EINTR);
1815 smb_credinit(&scred, cr);
1816
1817 /*
1818 * XXX: Do we need r_lkserlock too?
1819 * No use of any shared fid or fctx...
1820 */
1821
1822 /*
1823 * NFS needs to go over the wire, just to be sure whether the
1824 * file exists or not. Using a cached result is dangerous in
1825 * this case when making a decision regarding existence.
1826 *
1827 * The SMB protocol does NOT really need to go OTW here
1828 * thanks to the expressive NTCREATE disposition values.
1829 * Unfortunately, to do Unix access checks correctly,
1830 * we need to know if the object already exists.
1831 * When the object does not exist, we need VWRITE on
1832 * the directory. Note: smbfslookup() checks VEXEC.
1833 */
1834 error = smbfslookup(dvp, nm, &vp, cr, 0, ct);
1835 if (error == 0) {
1836 /*
1837 * The file already exists. Error?
1838 * NB: have a hold from smbfslookup
1839 */
1840 if (exclusive == EXCL) {
1841 error = EEXIST;
1842 VN_RELE(vp);
1843 goto out;
1844 }
1845 /*
1846 * Verify requested access.
1847 */
1848 error = smbfs_access(vp, mode, 0, cr, ct);
1849 if (error) {
1850 VN_RELE(vp);
1851 goto out;
1852 }
1853
1854 /*
1855 * Truncate (if requested).
1856 */
1857 if ((vattr.va_mask & AT_SIZE) && vattr.va_size == 0) {
1858 vattr.va_mask = AT_SIZE;
1859 error = smbfssetattr(vp, &vattr, 0, cr);
1860 if (error) {
1861 VN_RELE(vp);
1862 goto out;
1863 }
1864 }
1865 /* Success! */
1866 #ifdef NOT_YET
1867 vnevent_create(vp, ct);
1868 #endif
1869 *vpp = vp;
1870 goto out;
1871 }
1872
1873 /*
1874 * The file did not exist. Need VWRITE in the directory.
1875 */
1876 error = smbfs_access(dvp, VWRITE, 0, cr, ct);
1877 if (error)
1878 goto out;
1879
1880 /*
1881 * Now things get tricky. We also need to check the
1882 * requested open mode against the file we may create.
1883 * See comments at smbfs_access_rwx
1884 */
1885 error = smbfs_access_rwx(vfsp, VREG, mode, cr);
1886 if (error)
1887 goto out;
1888
1889 /*
1890 * Now the code derived from Darwin,
1891 * but with greater use of NT_CREATE
1892 * disposition options. Much changed.
1893 *
1894 * Create (or open) a new child node.
1895 * Note we handled "." and ".." above.
1896 */
1897
1898 if (exclusive == EXCL)
1899 disp = NTCREATEX_DISP_CREATE;
1900 else {
1901 /* Truncate regular files if requested. */
1902 if ((va->va_type == VREG) &&
1903 (va->va_mask & AT_SIZE) &&
1904 (va->va_size == 0))
1905 disp = NTCREATEX_DISP_OVERWRITE_IF;
1906 else
1907 disp = NTCREATEX_DISP_OPEN_IF;
1908 }
1909 xattr = (dnp->n_flag & N_XATTR) ? 1 : 0;
1910 error = smbfs_smb_create(dnp,
1911 name, nmlen, xattr,
1912 disp, &scred, &fid);
1913 if (error)
1914 goto out;
1915
1916 /*
1917 * XXX: Missing some code here to deal with
1918 * the case where we opened an existing file,
1919 * it's size is larger than 32-bits, and we're
1920 * setting the size from a process that's not
1921 * aware of large file offsets. i.e.
1922 * from the NFS3 code:
1923 */
1924 #if NOT_YET /* XXX */
1925 if ((vattr.va_mask & AT_SIZE) &&
1926 vp->v_type == VREG) {
1927 np = VTOSMB(vp);
1928 /*
1929 * Check here for large file handled
1930 * by LF-unaware process (as
1931 * ufs_create() does)
1932 */
1933 if (!(lfaware & FOFFMAX)) {
1934 mutex_enter(&np->r_statelock);
1935 if (np->r_size > MAXOFF32_T)
1936 error = EOVERFLOW;
1937 mutex_exit(&np->r_statelock);
1938 }
1939 if (!error) {
1940 vattr.va_mask = AT_SIZE;
1941 error = smbfssetattr(vp,
1942 &vattr, 0, cr);
1943 }
1944 }
1945 #endif /* XXX */
1946 /*
1947 * Should use the fid to get/set the size
1948 * while we have it opened here. See above.
1949 */
1950
1951 cerror = smbfs_smb_close(smi->smi_share, fid, NULL, &scred);
1952 if (cerror)
1953 SMBVDEBUG("error %d closing %s\\%s\n",
1954 cerror, dnp->n_rpath, name);
1955
1956 /*
1957 * In the open case, the name may differ a little
1958 * from what we passed to create (case, etc.)
1959 * so call lookup to get the (opened) name.
1960 *
1961 * XXX: Could avoid this extra lookup if the
1962 * "createact" result from NT_CREATE says we
1963 * created the object.
1964 */
1965 error = smbfs_smb_lookup(dnp, &name, &nmlen, &fattr, &scred);
1966 if (error)
1967 goto out;
1968
1969 /* update attr and directory cache */
1970 smbfs_attr_touchdir(dnp);
1971
1972 error = smbfs_nget(dvp, name, nmlen, &fattr, &vp);
1973 if (error)
1974 goto out;
1975
1976 /* XXX invalidate pages if we truncated? */
1977
1978 /* Success! */
1979 *vpp = vp;
1980 error = 0;
1981
1982 out:
1983 smb_credrele(&scred);
1984 smbfs_rw_exit(&dnp->r_rwlock);
1985 if (name != nm)
1986 smbfs_name_free(name, nmlen);
1987 return (error);
1988 }
1989
1990 /*
1991 * XXX
1992 * This op should support the new FIGNORECASE flag for case-insensitive
1993 * lookups, per PSARC 2007/244.
1994 */
1995 /* ARGSUSED */
1996 static int
1997 smbfs_remove(vnode_t *dvp, char *nm, cred_t *cr, caller_context_t *ct,
1998 int flags)
1999 {
2000 int error;
2001 vnode_t *vp;
2002 smbnode_t *np;
2003 smbnode_t *dnp;
2004 struct smb_cred scred;
2005 /* enum smbfsstat status; */
2006 smbmntinfo_t *smi;
2007
2008 smi = VTOSMI(dvp);
2009
2010 if (curproc->p_zone != smi->smi_zone_ref.zref_zone)
2011 return (EPERM);
2012
2013 if (smi->smi_flags & SMI_DEAD || dvp->v_vfsp->vfs_flag & VFS_UNMOUNTED)
2014 return (EIO);
2015
2016 dnp = VTOSMB(dvp);
2017 if (smbfs_rw_enter_sig(&dnp->r_rwlock, RW_WRITER, SMBINTR(dvp)))
2018 return (EINTR);
2019 smb_credinit(&scred, cr);
2020
2021 /*
2022 * Verify access to the dirctory.
2023 */
2024 error = smbfs_access(dvp, VWRITE|VEXEC, 0, cr, ct);
2025 if (error)
2026 goto out;
2027
2028 /*
2029 * NOTE: the darwin code gets the "vp" passed in so it looks
2030 * like the "vp" has probably been "lookup"ed by the VFS layer.
2031 * It looks like we will need to lookup the vp to check the
2032 * caches and check if the object being deleted is a directory.
2033 */
2034 error = smbfslookup(dvp, nm, &vp, cr, 0, ct);
2035 if (error)
2036 goto out;
2037
2038 /* Never allow link/unlink directories on CIFS. */
2039 if (vp->v_type == VDIR) {
2040 VN_RELE(vp);
2041 error = EPERM;
2042 goto out;
2043 }
2044
2045 /*
2046 * Now we have the real reference count on the vnode
2047 * Do we have the file open?
2048 */
2049 np = VTOSMB(vp);
2050 mutex_enter(&np->r_statelock);
2051 if ((vp->v_count > 1) && (np->n_fidrefs > 0)) {
2052 /*
2053 * NFS does a rename on remove here.
2054 * Probably not applicable for SMB.
2055 * Like Darwin, just return EBUSY.
2056 *
2057 * XXX: Todo - Use Trans2rename, and
2058 * if that fails, ask the server to
2059 * set the delete-on-close flag.
2060 */
2061 mutex_exit(&np->r_statelock);
2062 error = EBUSY;
2063 } else {
2064 smbfs_attrcache_rm_locked(np);
2065 mutex_exit(&np->r_statelock);
2066
2067 error = smbfs_smb_delete(np, &scred, NULL, 0, 0);
2068
2069 /*
2070 * If the file should no longer exist, discard
2071 * any cached attributes under this node.
2072 */
2073 switch (error) {
2074 case 0:
2075 case ENOENT:
2076 case ENOTDIR:
2077 smbfs_attrcache_prune(np);
2078 break;
2079 }
2080 }
2081
2082 VN_RELE(vp);
2083
2084 out:
2085 smb_credrele(&scred);
2086 smbfs_rw_exit(&dnp->r_rwlock);
2087
2088 return (error);
2089 }
2090
2091
2092 /*
2093 * XXX
2094 * This op should support the new FIGNORECASE flag for case-insensitive
2095 * lookups, per PSARC 2007/244.
2096 */
2097 /* ARGSUSED */
2098 static int
2099 smbfs_rename(vnode_t *odvp, char *onm, vnode_t *ndvp, char *nnm, cred_t *cr,
2100 caller_context_t *ct, int flags)
2101 {
2102 /* vnode_t *realvp; */
2103
2104 if (curproc->p_zone != VTOSMI(odvp)->smi_zone_ref.zref_zone ||
2105 curproc->p_zone != VTOSMI(ndvp)->smi_zone_ref.zref_zone)
2106 return (EPERM);
2107
2108 if (VTOSMI(odvp)->smi_flags & SMI_DEAD ||
2109 VTOSMI(ndvp)->smi_flags & SMI_DEAD ||
2110 odvp->v_vfsp->vfs_flag & VFS_UNMOUNTED ||
2111 ndvp->v_vfsp->vfs_flag & VFS_UNMOUNTED)
2112 return (EIO);
2113
2114 return (smbfsrename(odvp, onm, ndvp, nnm, cr, ct));
2115 }
2116
2117 /*
2118 * smbfsrename does the real work of renaming in SMBFS
2119 */
2120 /* ARGSUSED */
2121 static int
2122 smbfsrename(vnode_t *odvp, char *onm, vnode_t *ndvp, char *nnm, cred_t *cr,
2123 caller_context_t *ct)
2124 {
2125 int error;
2126 int nvp_locked = 0;
2127 vnode_t *nvp = NULL;
2128 vnode_t *ovp = NULL;
2129 smbnode_t *onp;
2130 smbnode_t *nnp;
2131 smbnode_t *odnp;
2132 smbnode_t *ndnp;
2133 struct smb_cred scred;
2134 /* enum smbfsstat status; */
2135
2136 ASSERT(curproc->p_zone == VTOSMI(odvp)->smi_zone_ref.zref_zone);
2137
2138 if (strcmp(onm, ".") == 0 || strcmp(onm, "..") == 0 ||
2139 strcmp(nnm, ".") == 0 || strcmp(nnm, "..") == 0)
2140 return (EINVAL);
2141
2142 /*
2143 * Check that everything is on the same filesystem.
2144 * vn_rename checks the fsid's, but in case we don't
2145 * fill those in correctly, check here too.
2146 */
2147 if (odvp->v_vfsp != ndvp->v_vfsp)
2148 return (EXDEV);
2149
2150 odnp = VTOSMB(odvp);
2151 ndnp = VTOSMB(ndvp);
2152
2153 /*
2154 * Avoid deadlock here on old vs new directory nodes
2155 * by always taking the locks in order of address.
2156 * The order is arbitrary, but must be consistent.
2157 */
2158 if (odnp < ndnp) {
2159 if (smbfs_rw_enter_sig(&odnp->r_rwlock, RW_WRITER,
2160 SMBINTR(odvp)))
2161 return (EINTR);
2162 if (smbfs_rw_enter_sig(&ndnp->r_rwlock, RW_WRITER,
2163 SMBINTR(ndvp))) {
2164 smbfs_rw_exit(&odnp->r_rwlock);
2165 return (EINTR);
2166 }
2167 } else {
2168 if (smbfs_rw_enter_sig(&ndnp->r_rwlock, RW_WRITER,
2169 SMBINTR(ndvp)))
2170 return (EINTR);
2171 if (smbfs_rw_enter_sig(&odnp->r_rwlock, RW_WRITER,
2172 SMBINTR(odvp))) {
2173 smbfs_rw_exit(&ndnp->r_rwlock);
2174 return (EINTR);
2175 }
2176 }
2177 smb_credinit(&scred, cr);
2178 /*
2179 * No returns after this point (goto out)
2180 */
2181
2182 /*
2183 * Need write access on source and target.
2184 * Server takes care of most checks.
2185 */
2186 error = smbfs_access(odvp, VWRITE|VEXEC, 0, cr, ct);
2187 if (error)
2188 goto out;
2189 if (odvp != ndvp) {
2190 error = smbfs_access(ndvp, VWRITE, 0, cr, ct);
2191 if (error)
2192 goto out;
2193 }
2194
2195 /*
2196 * Lookup the source name. Must already exist.
2197 */
2198 error = smbfslookup(odvp, onm, &ovp, cr, 0, ct);
2199 if (error)
2200 goto out;
2201
2202 /*
2203 * Lookup the target file. If it exists, it needs to be
2204 * checked to see whether it is a mount point and whether
2205 * it is active (open).
2206 */
2207 error = smbfslookup(ndvp, nnm, &nvp, cr, 0, ct);
2208 if (!error) {
2209 /*
2210 * Target (nvp) already exists. Check that it
2211 * has the same type as the source. The server
2212 * will check this also, (and more reliably) but
2213 * this lets us return the correct error codes.
2214 */
2215 if (ovp->v_type == VDIR) {
2216 if (nvp->v_type != VDIR) {
2217 error = ENOTDIR;
2218 goto out;
2219 }
2220 } else {
2221 if (nvp->v_type == VDIR) {
2222 error = EISDIR;
2223 goto out;
2224 }
2225 }
2226
2227 /*
2228 * POSIX dictates that when the source and target
2229 * entries refer to the same file object, rename
2230 * must do nothing and exit without error.
2231 */
2232 if (ovp == nvp) {
2233 error = 0;
2234 goto out;
2235 }
2236
2237 /*
2238 * Also must ensure the target is not a mount point,
2239 * and keep mount/umount away until we're done.
2240 */
2241 if (vn_vfsrlock(nvp)) {
2242 error = EBUSY;
2243 goto out;
2244 }
2245 nvp_locked = 1;
2246 if (vn_mountedvfs(nvp) != NULL) {
2247 error = EBUSY;
2248 goto out;
2249 }
2250
2251 /*
2252 * CIFS gives a SHARING_VIOLATION error when
2253 * trying to rename onto an exising object,
2254 * so try to remove the target first.
2255 * (Only for files, not directories.)
2256 */
2257 if (nvp->v_type == VDIR) {
2258 error = EEXIST;
2259 goto out;
2260 }
2261
2262 /*
2263 * Nodes that are "not active" here have v_count=2
2264 * because vn_renameat (our caller) did a lookup on
2265 * both the source and target before this call.
2266 * Otherwise this similar to smbfs_remove.
2267 */
2268 nnp = VTOSMB(nvp);
2269 mutex_enter(&nnp->r_statelock);
2270 if ((nvp->v_count > 2) && (nnp->n_fidrefs > 0)) {
2271 /*
2272 * The target file exists, is not the same as
2273 * the source file, and is active. Other FS
2274 * implementations unlink the target here.
2275 * For SMB, we don't assume we can remove an
2276 * open file. Return an error instead.
2277 */
2278 mutex_exit(&nnp->r_statelock);
2279 error = EBUSY;
2280 goto out;
2281 }
2282
2283 /*
2284 * Target file is not active. Try to remove it.
2285 */
2286 smbfs_attrcache_rm_locked(nnp);
2287 mutex_exit(&nnp->r_statelock);
2288
2289 error = smbfs_smb_delete(nnp, &scred, NULL, 0, 0);
2290
2291 /*
2292 * Similar to smbfs_remove
2293 */
2294 switch (error) {
2295 case 0:
2296 case ENOENT:
2297 case ENOTDIR:
2298 smbfs_attrcache_prune(nnp);
2299 break;
2300 }
2301
2302 if (error)
2303 goto out;
2304 /*
2305 * OK, removed the target file. Continue as if
2306 * lookup target had failed (nvp == NULL).
2307 */
2308 vn_vfsunlock(nvp);
2309 nvp_locked = 0;
2310 VN_RELE(nvp);
2311 nvp = NULL;
2312 } /* nvp */
2313
2314 onp = VTOSMB(ovp);
2315 smbfs_attrcache_remove(onp);
2316
2317 error = smbfs_smb_rename(onp, ndnp, nnm, strlen(nnm), &scred);
2318
2319 /*
2320 * If the old name should no longer exist,
2321 * discard any cached attributes under it.
2322 */
2323 if (error == 0)
2324 smbfs_attrcache_prune(onp);
2325
2326 out:
2327 if (nvp) {
2328 if (nvp_locked)
2329 vn_vfsunlock(nvp);
2330 VN_RELE(nvp);
2331 }
2332 if (ovp)
2333 VN_RELE(ovp);
2334
2335 smb_credrele(&scred);
2336 smbfs_rw_exit(&odnp->r_rwlock);
2337 smbfs_rw_exit(&ndnp->r_rwlock);
2338
2339 return (error);
2340 }
2341
2342 /*
2343 * XXX
2344 * vsecattr_t is new to build 77, and we need to eventually support
2345 * it in order to create an ACL when an object is created.
2346 *
2347 * This op should support the new FIGNORECASE flag for case-insensitive
2348 * lookups, per PSARC 2007/244.
2349 */
2350 /* ARGSUSED */
2351 static int
2352 smbfs_mkdir(vnode_t *dvp, char *nm, struct vattr *va, vnode_t **vpp,
2353 cred_t *cr, caller_context_t *ct, int flags, vsecattr_t *vsecp)
2354 {
2355 vnode_t *vp;
2356 struct smbnode *dnp = VTOSMB(dvp);
2357 struct smbmntinfo *smi = VTOSMI(dvp);
2358 struct smb_cred scred;
2359 struct smbfattr fattr;
2360 const char *name = (const char *) nm;
2361 int nmlen = strlen(name);
2362 int error, hiderr;
2363
2364 if (curproc->p_zone != smi->smi_zone_ref.zref_zone)
2365 return (EPERM);
2366
2367 if (smi->smi_flags & SMI_DEAD || dvp->v_vfsp->vfs_flag & VFS_UNMOUNTED)
2368 return (EIO);
2369
2370 if ((nmlen == 1 && name[0] == '.') ||
2371 (nmlen == 2 && name[0] == '.' && name[1] == '.'))
2372 return (EEXIST);
2373
2374 /* Only plain files are allowed in V_XATTRDIR. */
2375 if (dvp->v_flag & V_XATTRDIR)
2376 return (EINVAL);
2377
2378 if (smbfs_rw_enter_sig(&dnp->r_rwlock, RW_WRITER, SMBINTR(dvp)))
2379 return (EINTR);
2380 smb_credinit(&scred, cr);
2381
2382 /*
2383 * XXX: Do we need r_lkserlock too?
2384 * No use of any shared fid or fctx...
2385 */
2386
2387 /*
2388 * Require write access in the containing directory.
2389 */
2390 error = smbfs_access(dvp, VWRITE, 0, cr, ct);
2391 if (error)
2392 goto out;
2393
2394 error = smbfs_smb_mkdir(dnp, name, nmlen, &scred);
2395 if (error)
2396 goto out;
2397
2398 error = smbfs_smb_lookup(dnp, &name, &nmlen, &fattr, &scred);
2399 if (error)
2400 goto out;
2401
2402 smbfs_attr_touchdir(dnp);
2403
2404 error = smbfs_nget(dvp, name, nmlen, &fattr, &vp);
2405 if (error)
2406 goto out;
2407
2408 if (name[0] == '.')
2409 if ((hiderr = smbfs_smb_hideit(VTOSMB(vp), NULL, 0, &scred)))
2410 SMBVDEBUG("hide failure %d\n", hiderr);
2411
2412 /* Success! */
2413 *vpp = vp;
2414 error = 0;
2415 out:
2416 smb_credrele(&scred);
2417 smbfs_rw_exit(&dnp->r_rwlock);
2418
2419 if (name != nm)
2420 smbfs_name_free(name, nmlen);
2421
2422 return (error);
2423 }
2424
2425 /*
2426 * XXX
2427 * This op should support the new FIGNORECASE flag for case-insensitive
2428 * lookups, per PSARC 2007/244.
2429 */
2430 /* ARGSUSED */
2431 static int
2432 smbfs_rmdir(vnode_t *dvp, char *nm, vnode_t *cdir, cred_t *cr,
2433 caller_context_t *ct, int flags)
2434 {
2435 vnode_t *vp = NULL;
2436 int vp_locked = 0;
2437 struct smbmntinfo *smi = VTOSMI(dvp);
2438 struct smbnode *dnp = VTOSMB(dvp);
2439 struct smbnode *np;
2440 struct smb_cred scred;
2441 int error;
2442
2443 if (curproc->p_zone != smi->smi_zone_ref.zref_zone)
2444 return (EPERM);
2445
2446 if (smi->smi_flags & SMI_DEAD || dvp->v_vfsp->vfs_flag & VFS_UNMOUNTED)
2447 return (EIO);
2448
2449 if (smbfs_rw_enter_sig(&dnp->r_rwlock, RW_WRITER, SMBINTR(dvp)))
2450 return (EINTR);
2451 smb_credinit(&scred, cr);
2452
2453 /*
2454 * Require w/x access in the containing directory.
2455 * Server handles all other access checks.
2456 */
2457 error = smbfs_access(dvp, VEXEC|VWRITE, 0, cr, ct);
2458 if (error)
2459 goto out;
2460
2461 /*
2462 * First lookup the entry to be removed.
2463 */
2464 error = smbfslookup(dvp, nm, &vp, cr, 0, ct);
2465 if (error)
2466 goto out;
2467 np = VTOSMB(vp);
2468
2469 /*
2470 * Disallow rmdir of "." or current dir, or the FS root.
2471 * Also make sure it's a directory, not a mount point,
2472 * and lock to keep mount/umount away until we're done.
2473 */
2474 if ((vp == dvp) || (vp == cdir) || (vp->v_flag & VROOT)) {
2475 error = EINVAL;
2476 goto out;
2477 }
2478 if (vp->v_type != VDIR) {
2479 error = ENOTDIR;
2480 goto out;
2481 }
2482 if (vn_vfsrlock(vp)) {
2483 error = EBUSY;
2484 goto out;
2485 }
2486 vp_locked = 1;
2487 if (vn_mountedvfs(vp) != NULL) {
2488 error = EBUSY;
2489 goto out;
2490 }
2491
2492 smbfs_attrcache_remove(np);
2493 error = smbfs_smb_rmdir(np, &scred);
2494
2495 /*
2496 * Similar to smbfs_remove
2497 */
2498 switch (error) {
2499 case 0:
2500 case ENOENT:
2501 case ENOTDIR:
2502 smbfs_attrcache_prune(np);
2503 break;
2504 }
2505
2506 if (error)
2507 goto out;
2508
2509 mutex_enter(&np->r_statelock);
2510 dnp->n_flag |= NMODIFIED;
2511 mutex_exit(&np->r_statelock);
2512 smbfs_attr_touchdir(dnp);
2513 smbfs_rmhash(np);
2514
2515 out:
2516 if (vp) {
2517 if (vp_locked)
2518 vn_vfsunlock(vp);
2519 VN_RELE(vp);
2520 }
2521 smb_credrele(&scred);
2522 smbfs_rw_exit(&dnp->r_rwlock);
2523
2524 return (error);
2525 }
2526
2527
2528 /* ARGSUSED */
2529 static int
2530 smbfs_readdir(vnode_t *vp, struct uio *uiop, cred_t *cr, int *eofp,
2531 caller_context_t *ct, int flags)
2532 {
2533 struct smbnode *np = VTOSMB(vp);
2534 int error = 0;
2535 smbmntinfo_t *smi;
2536
2537 smi = VTOSMI(vp);
2538
2539 if (curproc->p_zone != smi->smi_zone_ref.zref_zone)
2540 return (EIO);
2541
2542 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED)
2543 return (EIO);
2544
2545 /*
2546 * Require read access in the directory.
2547 */
2548 error = smbfs_access(vp, VREAD, 0, cr, ct);
2549 if (error)
2550 return (error);
2551
2552 ASSERT(smbfs_rw_lock_held(&np->r_rwlock, RW_READER));
2553
2554 /*
2555 * XXX: Todo readdir cache here
2556 * Note: NFS code is just below this.
2557 *
2558 * I am serializing the entire readdir opreation
2559 * now since we have not yet implemented readdir
2560 * cache. This fix needs to be revisited once
2561 * we implement readdir cache.
2562 */
2563 if (smbfs_rw_enter_sig(&np->r_lkserlock, RW_WRITER, SMBINTR(vp)))
2564 return (EINTR);
2565
2566 error = smbfs_readvdir(vp, uiop, cr, eofp, ct);
2567
2568 smbfs_rw_exit(&np->r_lkserlock);
2569
2570 return (error);
2571 }
2572
2573 /* ARGSUSED */
2574 static int
2575 smbfs_readvdir(vnode_t *vp, uio_t *uio, cred_t *cr, int *eofp,
2576 caller_context_t *ct)
2577 {
2578 /*
2579 * Note: "limit" tells the SMB-level FindFirst/FindNext
2580 * functions how many directory entries to request in
2581 * each OtW call. It needs to be large enough so that
2582 * we don't make lots of tiny OtW requests, but there's
2583 * no point making it larger than the maximum number of
2584 * OtW entries that would fit in a maximum sized trans2
2585 * response (64k / 48). Beyond that, it's just tuning.
2586 * WinNT used 512, Win2k used 1366. We use 1000.
2587 */
2588 static const int limit = 1000;
2589 /* Largest possible dirent size. */
2590 static const size_t dbufsiz = DIRENT64_RECLEN(SMB_MAXFNAMELEN);
2591 struct smb_cred scred;
2592 vnode_t *newvp;
2593 struct smbnode *np = VTOSMB(vp);
2594 struct smbfs_fctx *ctx;
2595 struct dirent64 *dp;
2596 ssize_t save_resid;
2597 offset_t save_offset; /* 64 bits */
2598 int offset; /* yes, 32 bits */
2599 int nmlen, error;
2600 ushort_t reclen;
2601
2602 ASSERT(curproc->p_zone == VTOSMI(vp)->smi_zone_ref.zref_zone);
2603
2604 /* Make sure we serialize for n_dirseq use. */
2605 ASSERT(smbfs_rw_lock_held(&np->r_lkserlock, RW_WRITER));
2606
2607 /*
2608 * Make sure smbfs_open filled in n_dirseq
2609 */
2610 if (np->n_dirseq == NULL)
2611 return (EBADF);
2612
2613 /* Check for overflow of (32-bit) directory offset. */
2614 if (uio->uio_loffset < 0 || uio->uio_loffset > INT32_MAX ||
2615 (uio->uio_loffset + uio->uio_resid) > INT32_MAX)
2616 return (EINVAL);
2617
2618 /* Require space for at least one dirent. */
2619 if (uio->uio_resid < dbufsiz)
2620 return (EINVAL);
2621
2622 SMBVDEBUG("dirname='%s'\n", np->n_rpath);
2623 smb_credinit(&scred, cr);
2624 dp = kmem_alloc(dbufsiz, KM_SLEEP);
2625
2626 save_resid = uio->uio_resid;
2627 save_offset = uio->uio_loffset;
2628 offset = uio->uio_offset;
2629 SMBVDEBUG("in: offset=%d, resid=%d\n",
2630 (int)uio->uio_offset, (int)uio->uio_resid);
2631 error = 0;
2632
2633 /*
2634 * Generate the "." and ".." entries here so we can
2635 * (1) make sure they appear (but only once), and
2636 * (2) deal with getting their I numbers which the
2637 * findnext below does only for normal names.
2638 */
2639 while (offset < FIRST_DIROFS) {
2640 /*
2641 * Tricky bit filling in the first two:
2642 * offset 0 is ".", offset 1 is ".."
2643 * so strlen of these is offset+1.
2644 */
2645 reclen = DIRENT64_RECLEN(offset + 1);
2646 if (uio->uio_resid < reclen)
2647 goto out;
2648 bzero(dp, reclen);
2649 dp->d_reclen = reclen;
2650 dp->d_name[0] = '.';
2651 dp->d_name[1] = '.';
2652 dp->d_name[offset + 1] = '\0';
2653 /*
2654 * Want the real I-numbers for the "." and ".."
2655 * entries. For these two names, we know that
2656 * smbfslookup can get the nodes efficiently.
2657 */
2658 error = smbfslookup(vp, dp->d_name, &newvp, cr, 1, ct);
2659 if (error) {
2660 dp->d_ino = np->n_ino + offset; /* fiction */
2661 } else {
2662 dp->d_ino = VTOSMB(newvp)->n_ino;
2663 VN_RELE(newvp);
2664 }
2665 /*
2666 * Note: d_off is the offset that a user-level program
2667 * should seek to for reading the NEXT directory entry.
2668 * See libc: readdir, telldir, seekdir
2669 */
2670 dp->d_off = offset + 1;
2671 error = uiomove(dp, reclen, UIO_READ, uio);
2672 if (error)
2673 goto out;
2674 /*
2675 * Note: uiomove updates uio->uio_offset,
2676 * but we want it to be our "cookie" value,
2677 * which just counts dirents ignoring size.
2678 */
2679 uio->uio_offset = ++offset;
2680 }
2681
2682 /*
2683 * If there was a backward seek, we have to reopen.
2684 */
2685 if (offset < np->n_dirofs) {
2686 SMBVDEBUG("Reopening search %d:%d\n",
2687 offset, np->n_dirofs);
2688 error = smbfs_smb_findopen(np, "*", 1,
2689 SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR,
2690 &scred, &ctx);
2691 if (error) {
2692 SMBVDEBUG("can not open search, error = %d", error);
2693 goto out;
2694 }
2695 /* free the old one */
2696 (void) smbfs_smb_findclose(np->n_dirseq, &scred);
2697 /* save the new one */
2698 np->n_dirseq = ctx;
2699 np->n_dirofs = FIRST_DIROFS;
2700 } else {
2701 ctx = np->n_dirseq;
2702 }
2703
2704 /*
2705 * Skip entries before the requested offset.
2706 */
2707 while (np->n_dirofs < offset) {
2708 error = smbfs_smb_findnext(ctx, limit, &scred);
2709 if (error != 0)
2710 goto out;
2711 np->n_dirofs++;
2712 }
2713
2714 /*
2715 * While there's room in the caller's buffer:
2716 * get a directory entry from SMB,
2717 * convert to a dirent, copyout.
2718 * We stop when there is no longer room for a
2719 * maximum sized dirent because we must decide
2720 * before we know anything about the next entry.
2721 */
2722 while (uio->uio_resid >= dbufsiz) {
2723 error = smbfs_smb_findnext(ctx, limit, &scred);
2724 if (error != 0)
2725 goto out;
2726 np->n_dirofs++;
2727
2728 /* Sanity check the name length. */
2729 nmlen = ctx->f_nmlen;
2730 if (nmlen > SMB_MAXFNAMELEN) {
2731 nmlen = SMB_MAXFNAMELEN;
2732 SMBVDEBUG("Truncating name: %s\n", ctx->f_name);
2733 }
2734 if (smbfs_fastlookup) {
2735 /* See comment at smbfs_fastlookup above. */
2736 if (smbfs_nget(vp, ctx->f_name, nmlen,
2737 &ctx->f_attr, &newvp) == 0)
2738 VN_RELE(newvp);
2739 }
2740
2741 reclen = DIRENT64_RECLEN(nmlen);
2742 bzero(dp, reclen);
2743 dp->d_reclen = reclen;
2744 bcopy(ctx->f_name, dp->d_name, nmlen);
2745 dp->d_name[nmlen] = '\0';
2746 dp->d_ino = ctx->f_inum;
2747 dp->d_off = offset + 1; /* See d_off comment above */
2748 error = uiomove(dp, reclen, UIO_READ, uio);
2749 if (error)
2750 goto out;
2751 /* See comment re. uio_offset above. */
2752 uio->uio_offset = ++offset;
2753 }
2754
2755 out:
2756 /*
2757 * When we come to the end of a directory, the
2758 * SMB-level functions return ENOENT, but the
2759 * caller is not expecting an error return.
2760 *
2761 * Also note that we must delay the call to
2762 * smbfs_smb_findclose(np->n_dirseq, ...)
2763 * until smbfs_close so that all reads at the
2764 * end of the directory will return no data.
2765 */
2766 if (error == ENOENT) {
2767 error = 0;
2768 if (eofp)
2769 *eofp = 1;
2770 }
2771 /*
2772 * If we encountered an error (i.e. "access denied")
2773 * from the FindFirst call, we will have copied out
2774 * the "." and ".." entries leaving offset == 2.
2775 * In that case, restore the original offset/resid
2776 * so the caller gets no data with the error.
2777 */
2778 if (error != 0 && offset == FIRST_DIROFS) {
2779 uio->uio_loffset = save_offset;
2780 uio->uio_resid = save_resid;
2781 }
2782 SMBVDEBUG("out: offset=%d, resid=%d\n",
2783 (int)uio->uio_offset, (int)uio->uio_resid);
2784
2785 kmem_free(dp, dbufsiz);
2786 smb_credrele(&scred);
2787 return (error);
2788 }
2789
2790
2791 /*
2792 * The pair of functions VOP_RWLOCK, VOP_RWUNLOCK
2793 * are optional functions that are called by:
2794 * getdents, before/after VOP_READDIR
2795 * pread, before/after ... VOP_READ
2796 * pwrite, before/after ... VOP_WRITE
2797 * (other places)
2798 *
2799 * Careful here: None of the above check for any
2800 * error returns from VOP_RWLOCK / VOP_RWUNLOCK!
2801 * In fact, the return value from _rwlock is NOT
2802 * an error code, but V_WRITELOCK_TRUE / _FALSE.
2803 *
2804 * Therefore, it's up to _this_ code to make sure
2805 * the lock state remains balanced, which means
2806 * we can't "bail out" on interrupts, etc.
2807 */
2808
2809 /* ARGSUSED2 */
2810 static int
2811 smbfs_rwlock(vnode_t *vp, int write_lock, caller_context_t *ctp)
2812 {
2813 smbnode_t *np = VTOSMB(vp);
2814
2815 if (!write_lock) {
2816 (void) smbfs_rw_enter_sig(&np->r_rwlock, RW_READER, FALSE);
2817 return (V_WRITELOCK_FALSE);
2818 }
2819
2820
2821 (void) smbfs_rw_enter_sig(&np->r_rwlock, RW_WRITER, FALSE);
2822 return (V_WRITELOCK_TRUE);
2823 }
2824
2825 /* ARGSUSED */
2826 static void
2827 smbfs_rwunlock(vnode_t *vp, int write_lock, caller_context_t *ctp)
2828 {
2829 smbnode_t *np = VTOSMB(vp);
2830
2831 smbfs_rw_exit(&np->r_rwlock);
2832 }
2833
2834
2835 /* ARGSUSED */
2836 static int
2837 smbfs_seek(vnode_t *vp, offset_t ooff, offset_t *noffp, caller_context_t *ct)
2838 {
2839 smbmntinfo_t *smi;
2840
2841 smi = VTOSMI(vp);
2842
2843 if (curproc->p_zone != smi->smi_zone_ref.zref_zone)
2844 return (EPERM);
2845
2846 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED)
2847 return (EIO);
2848
2849 /*
2850 * Because we stuff the readdir cookie into the offset field
2851 * someone may attempt to do an lseek with the cookie which
2852 * we want to succeed.
2853 */
2854 if (vp->v_type == VDIR)
2855 return (0);
2856
2857 /* Like NFS3, just check for 63-bit overflow. */
2858 if (*noffp < 0)
2859 return (EINVAL);
2860
2861 return (0);
2862 }
2863
2864
2865 /*
2866 * XXX
2867 * This op may need to support PSARC 2007/440, nbmand changes for CIFS Service.
2868 */
2869 static int
2870 smbfs_frlock(vnode_t *vp, int cmd, struct flock64 *bfp, int flag,
2871 offset_t offset, struct flk_callback *flk_cbp, cred_t *cr,
2872 caller_context_t *ct)
2873 {
2874 if (curproc->p_zone != VTOSMI(vp)->smi_zone_ref.zref_zone)
2875 return (EIO);
2876
2877 if (VTOSMI(vp)->smi_flags & SMI_LLOCK)
2878 return (fs_frlock(vp, cmd, bfp, flag, offset, flk_cbp, cr, ct));
2879 else
2880 return (ENOSYS);
2881 }
2882
2883 /*
2884 * Free storage space associated with the specified vnode. The portion
2885 * to be freed is specified by bfp->l_start and bfp->l_len (already
2886 * normalized to a "whence" of 0).
2887 *
2888 * Called by fcntl(fd, F_FREESP, lkp) for libc:ftruncate, etc.
2889 */
2890 /* ARGSUSED */
2891 static int
2892 smbfs_space(vnode_t *vp, int cmd, struct flock64 *bfp, int flag,
2893 offset_t offset, cred_t *cr, caller_context_t *ct)
2894 {
2895 int error;
2896 smbmntinfo_t *smi;
2897
2898 smi = VTOSMI(vp);
2899
2900 if (curproc->p_zone != smi->smi_zone_ref.zref_zone)
2901 return (EIO);
2902
2903 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED)
2904 return (EIO);
2905
2906 /* Caller (fcntl) has checked v_type */
2907 ASSERT(vp->v_type == VREG);
2908 if (cmd != F_FREESP)
2909 return (EINVAL);
2910
2911 /*
2912 * Like NFS3, no 32-bit offset checks here.
2913 * Our SMB layer takes care to return EFBIG
2914 * when it has to fallback to a 32-bit call.
2915 */
2916
2917 error = convoff(vp, bfp, 0, offset);
2918 if (!error) {
2919 ASSERT(bfp->l_start >= 0);
2920 if (bfp->l_len == 0) {
2921 struct vattr va;
2922
2923 /*
2924 * ftruncate should not change the ctime and
2925 * mtime if we truncate the file to its
2926 * previous size.
2927 */
2928 va.va_mask = AT_SIZE;
2929 error = smbfsgetattr(vp, &va, cr);
2930 if (error || va.va_size == bfp->l_start)
2931 return (error);
2932 va.va_mask = AT_SIZE;
2933 va.va_size = bfp->l_start;
2934 error = smbfssetattr(vp, &va, 0, cr);
2935 } else
2936 error = EINVAL;
2937 }
2938
2939 return (error);
2940 }
2941
2942 /* ARGSUSED */
2943 static int
2944 smbfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr,
2945 caller_context_t *ct)
2946 {
2947 vfs_t *vfs;
2948 smbmntinfo_t *smi;
2949 struct smb_share *ssp;
2950
2951 vfs = vp->v_vfsp;
2952 smi = VFTOSMI(vfs);
2953
2954 if (curproc->p_zone != smi->smi_zone_ref.zref_zone)
2955 return (EIO);
2956
2957 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED)
2958 return (EIO);
2959
2960 switch (cmd) {
2961 case _PC_FILESIZEBITS:
2962 ssp = smi->smi_share;
2963 if (SSTOVC(ssp)->vc_sopt.sv_caps & SMB_CAP_LARGE_FILES)
2964 *valp = 64;
2965 else
2966 *valp = 32;
2967 break;
2968
2969 case _PC_LINK_MAX:
2970 /* We only ever report one link to an object */
2971 *valp = 1;
2972 break;
2973
2974 case _PC_ACL_ENABLED:
2975 /*
2976 * Always indicate that ACLs are enabled and
2977 * that we support ACE_T format, otherwise
2978 * libsec will ask for ACLENT_T format data
2979 * which we don't support.
2980 */
2981 *valp = _ACL_ACE_ENABLED;
2982 break;
2983
2984 case _PC_SYMLINK_MAX: /* No symlinks until we do Unix extensions */
2985 *valp = 0;
2986 break;
2987
2988 case _PC_XATTR_EXISTS:
2989 if (vfs->vfs_flag & VFS_XATTR) {
2990 *valp = smbfs_xa_exists(vp, cr);
2991 break;
2992 }
2993 return (EINVAL);
2994
2995 case _PC_TIMESTAMP_RESOLUTION:
2996 /*
2997 * Windows times are tenths of microseconds
2998 * (multiples of 100 nanoseconds).
2999 */
3000 *valp = 100L;
3001 break;
3002
3003 default:
3004 return (fs_pathconf(vp, cmd, valp, cr, ct));
3005 }
3006 return (0);
3007 }
3008
3009 /* ARGSUSED */
3010 static int
3011 smbfs_getsecattr(vnode_t *vp, vsecattr_t *vsa, int flag, cred_t *cr,
3012 caller_context_t *ct)
3013 {
3014 vfs_t *vfsp;
3015 smbmntinfo_t *smi;
3016 int error;
3017 uint_t mask;
3018
3019 vfsp = vp->v_vfsp;
3020 smi = VFTOSMI(vfsp);
3021
3022 if (curproc->p_zone != smi->smi_zone_ref.zref_zone)
3023 return (EIO);
3024
3025 if (smi->smi_flags & SMI_DEAD || vfsp->vfs_flag & VFS_UNMOUNTED)
3026 return (EIO);
3027
3028 /*
3029 * Our _pathconf indicates _ACL_ACE_ENABLED,
3030 * so we should only see VSA_ACE, etc here.
3031 * Note: vn_create asks for VSA_DFACLCNT,
3032 * and it expects ENOSYS and empty data.
3033 */
3034 mask = vsa->vsa_mask & (VSA_ACE | VSA_ACECNT |
3035 VSA_ACE_ACLFLAGS | VSA_ACE_ALLTYPES);
3036 if (mask == 0)
3037 return (ENOSYS);
3038
3039 if (smi->smi_flags & SMI_ACL)
3040 error = smbfs_acl_getvsa(vp, vsa, flag, cr);
3041 else
3042 error = ENOSYS;
3043
3044 if (error == ENOSYS)
3045 error = fs_fab_acl(vp, vsa, flag, cr, ct);
3046
3047 return (error);
3048 }
3049
3050 /* ARGSUSED */
3051 static int
3052 smbfs_setsecattr(vnode_t *vp, vsecattr_t *vsa, int flag, cred_t *cr,
3053 caller_context_t *ct)
3054 {
3055 vfs_t *vfsp;
3056 smbmntinfo_t *smi;
3057 int error;
3058 uint_t mask;
3059
3060 vfsp = vp->v_vfsp;
3061 smi = VFTOSMI(vfsp);
3062
3063 if (curproc->p_zone != smi->smi_zone_ref.zref_zone)
3064 return (EIO);
3065
3066 if (smi->smi_flags & SMI_DEAD || vfsp->vfs_flag & VFS_UNMOUNTED)
3067 return (EIO);
3068
3069 /*
3070 * Our _pathconf indicates _ACL_ACE_ENABLED,
3071 * so we should only see VSA_ACE, etc here.
3072 */
3073 mask = vsa->vsa_mask & (VSA_ACE | VSA_ACECNT);
3074 if (mask == 0)
3075 return (ENOSYS);
3076
3077 if (vfsp->vfs_flag & VFS_RDONLY)
3078 return (EROFS);
3079
3080 /*
3081 * Allow only the mount owner to do this.
3082 * See comments at smbfs_access_rwx.
3083 */
3084 error = secpolicy_vnode_setdac(cr, smi->smi_uid);
3085 if (error != 0)
3086 return (error);
3087
3088 if (smi->smi_flags & SMI_ACL)
3089 error = smbfs_acl_setvsa(vp, vsa, flag, cr);
3090 else
3091 error = ENOSYS;
3092
3093 return (error);
3094 }
3095
3096
3097 /*
3098 * XXX
3099 * This op should eventually support PSARC 2007/268.
3100 */
3101 static int
3102 smbfs_shrlock(vnode_t *vp, int cmd, struct shrlock *shr, int flag, cred_t *cr,
3103 caller_context_t *ct)
3104 {
3105 if (curproc->p_zone != VTOSMI(vp)->smi_zone_ref.zref_zone)
3106 return (EIO);
3107
3108 if (VTOSMI(vp)->smi_flags & SMI_LLOCK)
3109 return (fs_shrlock(vp, cmd, shr, flag, cr, ct));
3110 else
3111 return (ENOSYS);
3112 }