1 /* $NetBSD: udf_vnops.c,v 1.101 2015/04/20 23:03:08 riastradh Exp $ */
2
3 /*
4 * Copyright (c) 2006, 2008 Reinoud Zandijk
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 * Generic parts are derived from software contributed to The NetBSD Foundation
28 * by Julio M. Merino Vidal, developed as part of Google's Summer of Code
29 * 2005 program.
30 *
31 */
32
33 #include <sys/cdefs.h>
34 #ifndef lint
35 __KERNEL_RCSID(0, "$NetBSD: udf_vnops.c,v 1.101 2015/04/20 23:03:08 riastradh Exp $");
36 #endif /* not lint */
37
38
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/namei.h>
42 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */
43 #include <sys/kernel.h>
44 #include <sys/file.h> /* define FWRITE ... */
45 #include <sys/stat.h>
46 #include <sys/buf.h>
47 #include <sys/proc.h>
48 #include <sys/mount.h>
49 #include <sys/vnode.h>
50 #include <sys/signalvar.h>
51 #include <sys/malloc.h>
52 #include <sys/dirent.h>
53 #include <sys/lockf.h>
54 #include <sys/kauth.h>
55
56 #include <miscfs/genfs/genfs.h>
57 #include <uvm/uvm_extern.h>
58
59 #include <fs/udf/ecma167-udf.h>
60 #include <fs/udf/udf_mount.h>
61 #include <sys/dirhash.h>
62
63 #include "udf.h"
64 #include "udf_subr.h"
65 #include "udf_bswap.h"
66
67
68 #define VTOI(vnode) ((struct udf_node *) (vnode)->v_data)
69
70 /* forward declarations */
71 static int udf_do_readlink(struct udf_node *udf_node, uint64_t filesize,
72 uint8_t *targetbuf, int *length);
73
74 /* externs */
75 extern int prtactive;
76
77 /* implementations of vnode functions; table follows at end */
78 /* --------------------------------------------------------------------- */
79
80 int
udf_inactive(void * v)81 udf_inactive(void *v)
82 {
83 struct vop_inactive_args /* {
84 struct vnode *a_vp;
85 bool *a_recycle;
86 } */ *ap = v;
87 struct vnode *vp = ap->a_vp;
88 struct udf_node *udf_node = VTOI(vp);
89 int refcnt;
90
91 DPRINTF(NODE, ("udf_inactive called for udf_node %p\n", VTOI(vp)));
92
93 if (udf_node == NULL) {
94 DPRINTF(NODE, ("udf_inactive: inactive NULL UDF node\n"));
95 VOP_UNLOCK(vp);
96 return 0;
97 }
98
99 /*
100 * Optionally flush metadata to disc.
101 */
102 if (udf_node->fe) {
103 refcnt = udf_rw16(udf_node->fe->link_cnt);
104 } else {
105 assert(udf_node->efe);
106 refcnt = udf_rw16(udf_node->efe->link_cnt);
107 }
108
109 if ((refcnt == 0) && (vp->v_vflag & VV_SYSTEM)) {
110 DPRINTF(VOLUMES, ("UDF_INACTIVE deleting VV_SYSTEM\n"));
111 /* system nodes are not writen out on inactive, so flush */
112 udf_node->i_flags = 0;
113 }
114
115 *ap->a_recycle = false;
116 if ((refcnt == 0) && ((vp->v_vflag & VV_SYSTEM) == 0)) {
117 *ap->a_recycle = true;
118 VOP_UNLOCK(vp);
119 return 0;
120 }
121
122 /* write out its node */
123 if (udf_node->i_flags & (IN_CHANGE | IN_UPDATE | IN_MODIFIED))
124 udf_update(vp, NULL, NULL, NULL, 0);
125 VOP_UNLOCK(vp);
126
127 return 0;
128 }
129
130 /* --------------------------------------------------------------------- */
131
132 int
udf_reclaim(void * v)133 udf_reclaim(void *v)
134 {
135 struct vop_reclaim_args /* {
136 struct vnode *a_vp;
137 } */ *ap = v;
138 struct vnode *vp = ap->a_vp;
139 struct udf_node *udf_node = VTOI(vp);
140 int refcnt;
141
142 DPRINTF(NODE, ("udf_reclaim called for node %p\n", udf_node));
143 if (prtactive && vp->v_usecount > 1)
144 vprint("udf_reclaim(): pushing active", vp);
145
146 if (udf_node == NULL) {
147 DPRINTF(NODE, ("udf_reclaim(): null udfnode\n"));
148 return 0;
149 }
150
151 /*
152 * If the file has not been referenced anymore in a directory
153 * we ought to free up the resources on disc if applicable.
154 */
155 if (udf_node->fe) {
156 refcnt = udf_rw16(udf_node->fe->link_cnt);
157 } else {
158 assert(udf_node->efe);
159 refcnt = udf_rw16(udf_node->efe->link_cnt);
160 }
161
162 if ((refcnt == 0) && ((vp->v_vflag & VV_SYSTEM) == 0)) {
163 /* remove this file's allocation */
164 DPRINTF(NODE, ("udf_inactive deleting unlinked file\n"));
165 udf_delete_node(udf_node);
166 }
167
168 /* update note for closure */
169 udf_update(vp, NULL, NULL, NULL, UPDATE_CLOSE);
170
171 /* async check to see if all node descriptors are written out */
172 while ((volatile int) udf_node->outstanding_nodedscr > 0) {
173 vprint("udf_reclaim(): waiting for writeout\n", vp);
174 tsleep(&udf_node->outstanding_nodedscr, PRIBIO, "recl wait", hz/8);
175 }
176
177 vcache_remove(vp->v_mount, &udf_node->loc.loc,
178 sizeof(udf_node->loc.loc));
179
180 /* dispose all node knowledge */
181 udf_dispose_node(udf_node);
182
183 return 0;
184 }
185
186 /* --------------------------------------------------------------------- */
187
188 int
udf_read(void * v)189 udf_read(void *v)
190 {
191 struct vop_read_args /* {
192 struct vnode *a_vp;
193 struct uio *a_uio;
194 int a_ioflag;
195 kauth_cred_t a_cred;
196 } */ *ap = v;
197 struct vnode *vp = ap->a_vp;
198 struct uio *uio = ap->a_uio;
199 int ioflag = ap->a_ioflag;
200 int advice = IO_ADV_DECODE(ap->a_ioflag);
201 struct uvm_object *uobj;
202 struct udf_node *udf_node = VTOI(vp);
203 struct file_entry *fe;
204 struct extfile_entry *efe;
205 uint64_t file_size;
206 vsize_t len;
207 int error;
208
209 /*
210 * XXX reading from extended attributes not yet implemented. FreeBSD
211 * has it in mind to forward the IO_EXT read call to the
212 * VOP_READEXTATTR().
213 */
214
215 DPRINTF(READ, ("udf_read called\n"));
216
217 /* can this happen? some filingsystems have this check */
218 if (uio->uio_offset < 0)
219 return EINVAL;
220 if (uio->uio_resid == 0)
221 return 0;
222
223 /* protect against rogue programs reading raw directories and links */
224 if ((ioflag & IO_ALTSEMANTICS) == 0) {
225 if (vp->v_type == VDIR)
226 return EISDIR;
227 /* all but regular files just give EINVAL */
228 if (vp->v_type != VREG)
229 return EINVAL;
230 }
231
232 assert(udf_node);
233 assert(udf_node->fe || udf_node->efe);
234
235 /* get file/directory filesize */
236 if (udf_node->fe) {
237 fe = udf_node->fe;
238 file_size = udf_rw64(fe->inf_len);
239 } else {
240 assert(udf_node->efe);
241 efe = udf_node->efe;
242 file_size = udf_rw64(efe->inf_len);
243 }
244
245 /* read contents using buffercache */
246 uobj = &vp->v_uobj;
247 error = 0;
248 while (uio->uio_resid > 0) {
249 /* reached end? */
250 if (file_size <= uio->uio_offset)
251 break;
252
253 /* maximise length to file extremity */
254 len = MIN(file_size - uio->uio_offset, uio->uio_resid);
255 if (len == 0)
256 break;
257
258 /* ubc, here we come, prepare to trap */
259 error = ubc_uiomove(uobj, uio, len, advice,
260 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp));
261 if (error)
262 break;
263 }
264
265 /* note access time unless not requested */
266 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) {
267 udf_node->i_flags |= IN_ACCESS;
268 if ((ioflag & IO_SYNC) == IO_SYNC) {
269 int uerror;
270
271 uerror = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT);
272 if (error == 0)
273 error = uerror;
274 }
275 }
276
277 return error;
278 }
279
280 /* --------------------------------------------------------------------- */
281
282 int
udf_write(void * v)283 udf_write(void *v)
284 {
285 struct vop_write_args /* {
286 struct vnode *a_vp;
287 struct uio *a_uio;
288 int a_ioflag;
289 kauth_cred_t a_cred;
290 } */ *ap = v;
291 struct vnode *vp = ap->a_vp;
292 struct uio *uio = ap->a_uio;
293 int ioflag = ap->a_ioflag;
294 kauth_cred_t cred = ap->a_cred;
295 int advice = IO_ADV_DECODE(ap->a_ioflag);
296 struct uvm_object *uobj;
297 struct udf_node *udf_node = VTOI(vp);
298 struct file_entry *fe;
299 struct extfile_entry *efe;
300 uint64_t file_size, old_size, old_offset;
301 vsize_t len;
302 int aflag = ioflag & IO_SYNC ? B_SYNC : 0;
303 int error;
304 int resid, extended;
305
306 /*
307 * XXX writing to extended attributes not yet implemented. FreeBSD has
308 * it in mind to forward the IO_EXT read call to the
309 * VOP_READEXTATTR().
310 */
311
312 DPRINTF(WRITE, ("udf_write called\n"));
313
314 /* can this happen? some filingsystems have this check */
315 if (uio->uio_offset < 0)
316 return EINVAL;
317 if (uio->uio_resid == 0)
318 return 0;
319
320 /* protect against rogue programs writing raw directories or links */
321 if ((ioflag & IO_ALTSEMANTICS) == 0) {
322 if (vp->v_type == VDIR)
323 return EISDIR;
324 /* all but regular files just give EINVAL for now */
325 if (vp->v_type != VREG)
326 return EINVAL;
327 }
328
329 assert(udf_node);
330 assert(udf_node->fe || udf_node->efe);
331
332 /* get file/directory filesize */
333 if (udf_node->fe) {
334 fe = udf_node->fe;
335 file_size = udf_rw64(fe->inf_len);
336 } else {
337 assert(udf_node->efe);
338 efe = udf_node->efe;
339 file_size = udf_rw64(efe->inf_len);
340 }
341 old_size = file_size;
342
343 /* if explicitly asked to append, uio_offset can be wrong? */
344 if (ioflag & IO_APPEND)
345 uio->uio_offset = file_size;
346
347 extended = (uio->uio_offset + uio->uio_resid > file_size);
348 if (extended) {
349 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n",
350 file_size, uio->uio_offset + uio->uio_resid));
351 error = udf_grow_node(udf_node, uio->uio_offset + uio->uio_resid);
352 if (error)
353 return error;
354 file_size = uio->uio_offset + uio->uio_resid;
355 }
356
357 /* write contents using buffercache */
358 uobj = &vp->v_uobj;
359 resid = uio->uio_resid;
360 error = 0;
361
362 uvm_vnp_setwritesize(vp, file_size);
363 old_offset = uio->uio_offset;
364 while (uio->uio_resid > 0) {
365 /* maximise length to file extremity */
366 len = MIN(file_size - uio->uio_offset, uio->uio_resid);
367 if (len == 0)
368 break;
369
370 genfs_node_wrlock(vp);
371 error = GOP_ALLOC(vp, uio->uio_offset, len, aflag, cred);
372 genfs_node_unlock(vp);
373 if (error)
374 break;
375
376 /* ubc, here we come, prepare to trap */
377 error = ubc_uiomove(uobj, uio, len, advice,
378 UBC_WRITE | UBC_UNMAP_FLAG(vp));
379 if (error)
380 break;
381
382 /*
383 * flush what we just wrote if necessary.
384 * XXXUBC simplistic async flushing.
385 *
386 * Directories are excluded since its file data that we want
387 * to purge.
388 */
389 if ((vp->v_type != VDIR) &&
390 (old_offset >> 16 != uio->uio_offset >> 16)) {
391 mutex_enter(vp->v_interlock);
392 error = VOP_PUTPAGES(vp, (old_offset >> 16) << 16,
393 (uio->uio_offset >> 16) << 16,
394 PGO_CLEANIT | PGO_LAZY);
395 old_offset = uio->uio_offset;
396 }
397 }
398 uvm_vnp_setsize(vp, file_size);
399
400 /* mark node changed and request update */
401 udf_node->i_flags |= IN_CHANGE | IN_UPDATE;
402 if (vp->v_mount->mnt_flag & MNT_RELATIME)
403 udf_node->i_flags |= IN_ACCESS;
404
405 /*
406 * XXX TODO FFS has code here to reset setuid & setgid when we're not
407 * the superuser as a precaution against tampering.
408 */
409
410 /* if we wrote a thing, note write action on vnode */
411 if (resid > uio->uio_resid)
412 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0));
413
414 if (error) {
415 /* bring back file size to its former size */
416 /* take notice of its errors? */
417 (void) udf_chsize(vp, (u_quad_t) old_size, cred);
418
419 /* roll back uio */
420 uio->uio_offset -= resid - uio->uio_resid;
421 uio->uio_resid = resid;
422 } else {
423 /* if we write and we're synchronous, update node */
424 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC))
425 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT);
426 }
427
428 return error;
429 }
430
431
432 /* --------------------------------------------------------------------- */
433
434 /*
435 * `Special' bmap functionality that translates all incomming requests to
436 * translate to vop_strategy() calls with the same blocknumbers effectively
437 * not translating at all.
438 */
439
440 int
udf_trivial_bmap(void * v)441 udf_trivial_bmap(void *v)
442 {
443 struct vop_bmap_args /* {
444 struct vnode *a_vp;
445 daddr_t a_bn;
446 struct vnode **a_vpp;
447 daddr_t *a_bnp;
448 int *a_runp;
449 } */ *ap = v;
450 struct vnode *vp = ap->a_vp; /* our node */
451 struct vnode **vpp = ap->a_vpp; /* return node */
452 daddr_t *bnp = ap->a_bnp; /* translated */
453 daddr_t bn = ap->a_bn; /* origional */
454 int *runp = ap->a_runp;
455 struct udf_node *udf_node = VTOI(vp);
456 uint32_t lb_size;
457
458 /* get logical block size */
459 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size);
460
461 /* could return `-1' to indicate holes/zeros */
462 /* translate 1:1 */
463 *bnp = bn;
464
465 /* set the vnode to read the data from with strategy on itself */
466 if (vpp)
467 *vpp = vp;
468
469 /* set runlength of maximum block size */
470 if (runp)
471 *runp = MAXPHYS / lb_size; /* or with -1 ? */
472
473 /* return success */
474 return 0;
475 }
476
477 /* --------------------------------------------------------------------- */
478
479 int
udf_vfsstrategy(void * v)480 udf_vfsstrategy(void *v)
481 {
482 struct vop_strategy_args /* {
483 struct vnode *a_vp;
484 struct buf *a_bp;
485 } */ *ap = v;
486 struct vnode *vp = ap->a_vp;
487 struct buf *bp = ap->a_bp;
488 struct udf_node *udf_node = VTOI(vp);
489 uint32_t lb_size, sectors;
490
491 DPRINTF(STRATEGY, ("udf_strategy called\n"));
492
493 /* check if we ought to be here */
494 if (vp->v_type == VBLK || vp->v_type == VCHR)
495 panic("udf_strategy: spec");
496
497 /* only filebuffers ought to be read/write by this, no descriptors */
498 assert(bp->b_blkno >= 0);
499
500 /* get sector size */
501 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size);
502
503 /* calculate length to fetch/store in sectors */
504 sectors = bp->b_bcount / lb_size;
505 assert(bp->b_bcount > 0);
506
507 /* NEVER assume later that this buffer is already translated */
508 /* bp->b_lblkno = bp->b_blkno; */
509
510 /* check assertions: we OUGHT to always get multiples of this */
511 assert(sectors * lb_size == bp->b_bcount);
512 __USE(sectors);
513
514 /* issue buffer */
515 if (bp->b_flags & B_READ) {
516 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")"
517 ", for %d sectors\n",
518 vp, bp, bp->b_blkno, sectors));
519
520 /* read buffer from the udf_node, translate vtop on the way*/
521 udf_read_filebuf(udf_node, bp);
522 } else {
523 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")"
524 ", for %d sectors\n",
525 vp, bp, bp->b_blkno, sectors));
526
527 /* write buffer to the udf_node, translate vtop on the way*/
528 udf_write_filebuf(udf_node, bp);
529 }
530
531 return bp->b_error;
532 }
533
534 /* --------------------------------------------------------------------- */
535
536 int
udf_readdir(void * v)537 udf_readdir(void *v)
538 {
539 struct vop_readdir_args /* {
540 struct vnode *a_vp;
541 struct uio *a_uio;
542 kauth_cred_t a_cred;
543 int *a_eofflag;
544 off_t **a_cookies;
545 int *a_ncookies;
546 } */ *ap = v;
547 struct uio *uio = ap->a_uio;
548 struct vnode *vp = ap->a_vp;
549 struct udf_node *udf_node = VTOI(vp);
550 struct file_entry *fe;
551 struct extfile_entry *efe;
552 struct fileid_desc *fid;
553 struct dirent *dirent;
554 uint64_t file_size, diroffset, transoffset;
555 uint32_t lb_size;
556 int error;
557
558 DPRINTF(READDIR, ("udf_readdir called\n"));
559
560 /* This operation only makes sense on directory nodes. */
561 if (vp->v_type != VDIR)
562 return ENOTDIR;
563
564 /* get directory filesize */
565 if (udf_node->fe) {
566 fe = udf_node->fe;
567 file_size = udf_rw64(fe->inf_len);
568 } else {
569 assert(udf_node->efe);
570 efe = udf_node->efe;
571 file_size = udf_rw64(efe->inf_len);
572 }
573
574 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO);
575
576 /*
577 * Add `.' pseudo entry if at offset zero since its not in the fid
578 * stream
579 */
580 if (uio->uio_offset == 0) {
581 DPRINTF(READDIR, ("\t'.' inserted\n"));
582 strcpy(dirent->d_name, ".");
583 dirent->d_fileno = udf_get_node_id(&udf_node->loc);
584 dirent->d_type = DT_DIR;
585 dirent->d_namlen = strlen(dirent->d_name);
586 dirent->d_reclen = _DIRENT_SIZE(dirent);
587 uiomove(dirent, _DIRENT_SIZE(dirent), uio);
588
589 /* mark with magic value that we have done the dummy */
590 uio->uio_offset = UDF_DIRCOOKIE_DOT;
591 }
592
593 /* we are called just as long as we keep on pushing data in */
594 error = 0;
595 if (uio->uio_offset < file_size) {
596 /* allocate temporary space for fid */
597 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size);
598 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK);
599
600 if (uio->uio_offset == UDF_DIRCOOKIE_DOT)
601 uio->uio_offset = 0;
602
603 diroffset = uio->uio_offset;
604 transoffset = diroffset;
605 while (diroffset < file_size) {
606 DPRINTF(READDIR, ("\tread in fid stream\n"));
607 /* transfer a new fid/dirent */
608 error = udf_read_fid_stream(vp, &diroffset, fid, dirent);
609 DPRINTFIF(READDIR, error, ("read error in read fid "
610 "stream : %d\n", error));
611 if (error)
612 break;
613
614 /*
615 * If there isn't enough space in the uio to return a
616 * whole dirent, break off read
617 */
618 if (uio->uio_resid < _DIRENT_SIZE(dirent))
619 break;
620
621 /* remember the last entry we transfered */
622 transoffset = diroffset;
623
624 /* skip deleted entries */
625 if (fid->file_char & UDF_FILE_CHAR_DEL)
626 continue;
627
628 /* skip not visible files */
629 if (fid->file_char & UDF_FILE_CHAR_VIS)
630 continue;
631
632 /* copy dirent to the caller */
633 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n",
634 dirent->d_name, dirent->d_type));
635 uiomove(dirent, _DIRENT_SIZE(dirent), uio);
636 }
637
638 /* pass on last transfered offset */
639 uio->uio_offset = transoffset;
640 free(fid, M_UDFTEMP);
641 }
642
643 if (ap->a_eofflag)
644 *ap->a_eofflag = (uio->uio_offset >= file_size);
645
646 #ifdef DEBUG
647 if (udf_verbose & UDF_DEBUG_READDIR) {
648 printf("returning offset %d\n", (uint32_t) uio->uio_offset);
649 if (ap->a_eofflag)
650 printf("returning EOF ? %d\n", *ap->a_eofflag);
651 if (error)
652 printf("readdir returning error %d\n", error);
653 }
654 #endif
655
656 free(dirent, M_UDFTEMP);
657 return error;
658 }
659
660 /* --------------------------------------------------------------------- */
661
662 int
udf_lookup(void * v)663 udf_lookup(void *v)
664 {
665 struct vop_lookup_v2_args /* {
666 struct vnode *a_dvp;
667 struct vnode **a_vpp;
668 struct componentname *a_cnp;
669 } */ *ap = v;
670 struct vnode *dvp = ap->a_dvp;
671 struct vnode **vpp = ap->a_vpp;
672 struct componentname *cnp = ap->a_cnp;
673 struct udf_node *dir_node, *res_node;
674 struct udf_mount *ump;
675 struct long_ad icb_loc;
676 mode_t mode;
677 uid_t d_uid;
678 gid_t d_gid;
679 const char *name;
680 int namelen, nameiop, islastcn, mounted_ro;
681 int error, found;
682
683 dir_node = VTOI(dvp);
684 ump = dir_node->ump;
685 *vpp = NULL;
686
687 DPRINTF(LOOKUP, ("udf_lookup called, lookup `%s`\n",
688 cnp->cn_nameptr));
689
690 /* simplify/clarification flags */
691 nameiop = cnp->cn_nameiop;
692 islastcn = cnp->cn_flags & ISLASTCN;
693 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY;
694
695 /* check exec/dirread permissions first */
696 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred);
697 if (error)
698 return error;
699
700 DPRINTF(LOOKUP, ("\taccess ok\n"));
701
702 /*
703 * If requesting a modify on the last path element on a read-only
704 * filingsystem, reject lookup; XXX why is this repeated in every FS ?
705 */
706 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME))
707 return EROFS;
708
709 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n",
710 cnp->cn_nameptr));
711 /* look in the namecache */
712 if (cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
713 cnp->cn_nameiop, cnp->cn_flags, NULL, vpp)) {
714 return *vpp == NULLVP ? ENOENT : 0;
715 }
716
717 DPRINTF(LOOKUP, ("\tNOT found in cache\n"));
718
719 /*
720 * Obviously, the file is not (anymore) in the namecache, we have to
721 * search for it. There are three basic cases: '.', '..' and others.
722 *
723 * Following the guidelines of VOP_LOOKUP manpage and tmpfs.
724 */
725 error = 0;
726 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) {
727 DPRINTF(LOOKUP, ("\tlookup '.'\n"));
728 /* special case 1 '.' */
729 if (islastcn && cnp->cn_nameiop == RENAME) {
730 error = EISDIR;
731 goto out;
732 }
733 vref(dvp);
734 *vpp = dvp;
735 /* done */
736 goto done;
737 } else if (cnp->cn_flags & ISDOTDOT) {
738 /* special case 2 '..' */
739 DPRINTF(LOOKUP, ("\tlookup '..'\n"));
740
741 if (islastcn && cnp->cn_nameiop == RENAME) {
742 error = EINVAL;
743 goto out;
744 }
745
746 /* get our node */
747 name = "..";
748 namelen = 2;
749 error = udf_lookup_name_in_dir(dvp, name, namelen,
750 &icb_loc, &found);
751 if (error)
752 goto out;
753 if (!found)
754 error = ENOENT;
755
756 /* first unlock parent */
757 VOP_UNLOCK(dvp);
758
759 if (error == 0) {
760 DPRINTF(LOOKUP, ("\tfound '..'\n"));
761 /* try to create/reuse the node */
762 error = udf_get_node(ump, &icb_loc, &res_node);
763
764 if (!error) {
765 DPRINTF(LOOKUP,
766 ("\tnode retrieved/created OK\n"));
767 *vpp = res_node->vnode;
768 }
769 }
770
771 /* try to relock parent */
772 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
773 goto out;
774 }
775
776 /* all other files */
777 DPRINTF(LOOKUP, ("\tlookup file/dir in directory\n"));
778
779 /* lookup filename in the directory; location icb_loc */
780 name = cnp->cn_nameptr;
781 namelen = cnp->cn_namelen;
782 error = udf_lookup_name_in_dir(dvp, name, namelen,
783 &icb_loc, &found);
784 if (error)
785 goto out;
786 if (!found) {
787 DPRINTF(LOOKUP, ("\tNOT found\n"));
788 /*
789 * The entry was not found in the directory. This is
790 * valid if we are creating or renaming an entry and
791 * are working on the last component of the path name.
792 */
793 if (islastcn && (cnp->cn_nameiop == CREATE ||
794 cnp->cn_nameiop == RENAME)) {
795 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred);
796 if (error) {
797 goto out;
798 }
799 error = EJUSTRETURN;
800 } else {
801 error = ENOENT;
802 }
803 /* done */
804 goto done;
805 }
806
807 /*
808 * XXX NOTE tmpfs has a test here that tests that intermediate
809 * components i.e. not the last one ought to be either a directory or
810 * a link. It seems to function well without this code.
811 */
812
813 /* try to create/reuse the node */
814 error = udf_get_node(ump, &icb_loc, &res_node);
815 if (error)
816 goto out;
817
818 /* check permissions */
819 if (islastcn && (cnp->cn_nameiop == DELETE ||
820 cnp->cn_nameiop == RENAME) ) {
821 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred);
822 if (error) {
823 vput(res_node->vnode);
824 goto out;
825 }
826
827 /*
828 * Check if the directory has its sticky bit set. If so, ask
829 * for clearance since only the owner of a file or directory
830 * can remove/rename from taht directory.
831 */
832 mode = udf_getaccessmode(dir_node);
833 if ((mode & S_ISTXT) != 0) {
834 udf_getownership(dir_node, &d_uid, &d_gid);
835 error = kauth_authorize_vnode(cnp->cn_cred,
836 KAUTH_VNODE_DELETE, res_node->vnode,
837 dir_node->vnode, genfs_can_sticky(cnp->cn_cred,
838 d_uid, d_uid));
839 if (error) {
840 error = EPERM;
841 vput(res_node->vnode);
842 goto out;
843 }
844 }
845 }
846
847 *vpp = res_node->vnode;
848
849 done:
850 /*
851 * Store result in the cache if requested. If we are creating a file,
852 * the file might not be found and thus putting it into the namecache
853 * might be seen as negative caching.
854 */
855 if (nameiop != CREATE)
856 cache_enter(dvp, *vpp, cnp->cn_nameptr, cnp->cn_namelen,
857 cnp->cn_flags);
858
859 out:
860 if (error == 0 && *vpp != dvp)
861 VOP_UNLOCK(*vpp);
862 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error));
863
864 return error;
865 }
866
867 /* --------------------------------------------------------------------- */
868
869 int
udf_getattr(void * v)870 udf_getattr(void *v)
871 {
872 struct vop_getattr_args /* {
873 struct vnode *a_vp;
874 struct vattr *a_vap;
875 kauth_cred_t a_cred;
876 struct lwp *a_l;
877 } */ *ap = v;
878 struct vnode *vp = ap->a_vp;
879 struct udf_node *udf_node = VTOI(vp);
880 struct udf_mount *ump = udf_node->ump;
881 struct file_entry *fe = udf_node->fe;
882 struct extfile_entry *efe = udf_node->efe;
883 struct filetimes_extattr_entry *ft_extattr;
884 struct device_extattr_entry *devattr;
885 struct vattr *vap = ap->a_vap;
886 struct timestamp *atime, *mtime, *attrtime, *creatime;
887 uint64_t filesize, blkssize;
888 uint32_t nlink;
889 uint32_t offset, a_l;
890 uint8_t *filedata, *targetbuf;
891 uid_t uid;
892 gid_t gid;
893 int length, error;
894
895 DPRINTF(CALL, ("udf_getattr called\n"));
896
897 /* update times before we returning values */
898 udf_itimes(udf_node, NULL, NULL, NULL);
899
900 /* get descriptor information */
901 if (fe) {
902 nlink = udf_rw16(fe->link_cnt);
903 uid = (uid_t)udf_rw32(fe->uid);
904 gid = (gid_t)udf_rw32(fe->gid);
905 filesize = udf_rw64(fe->inf_len);
906 blkssize = udf_rw64(fe->logblks_rec);
907 atime = &fe->atime;
908 mtime = &fe->mtime;
909 attrtime = &fe->attrtime;
910 filedata = fe->data;
911
912 /* initial guess */
913 creatime = mtime;
914
915 /* check our extended attribute if present */
916 error = udf_extattr_search_intern(udf_node,
917 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l);
918 if (!error) {
919 ft_extattr = (struct filetimes_extattr_entry *)
920 (filedata + offset);
921 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION)
922 creatime = &ft_extattr->times[0];
923 }
924 } else {
925 assert(udf_node->efe);
926 nlink = udf_rw16(efe->link_cnt);
927 uid = (uid_t)udf_rw32(efe->uid);
928 gid = (gid_t)udf_rw32(efe->gid);
929 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */
930 blkssize = udf_rw64(efe->logblks_rec);
931 atime = &efe->atime;
932 mtime = &efe->mtime;
933 attrtime = &efe->attrtime;
934 creatime = &efe->ctime;
935 filedata = efe->data;
936 }
937
938 /* do the uid/gid translation game */
939 if (uid == (uid_t) -1)
940 uid = ump->mount_args.anon_uid;
941 if (gid == (gid_t) -1)
942 gid = ump->mount_args.anon_gid;
943
944 /* fill in struct vattr with values from the node */
945 vattr_null(vap);
946 vap->va_type = vp->v_type;
947 vap->va_mode = udf_getaccessmode(udf_node);
948 vap->va_nlink = nlink;
949 vap->va_uid = uid;
950 vap->va_gid = gid;
951 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0];
952 vap->va_fileid = udf_get_node_id(&udf_node->loc); /* inode hash XXX */
953 vap->va_size = filesize;
954 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */
955
956 /*
957 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add
958 * 1 to the link count if its a directory we're requested attributes
959 * of.
960 */
961 if (vap->va_type == VDIR)
962 vap->va_nlink++;
963
964 /*
965 * BUG-ALERT: Posix requires the va_size to be pathlength for symbolic
966 * links.
967 */
968 if (vap->va_type == VLNK) {
969 /* claim temporary buffers for translation */
970 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK);
971 error = udf_do_readlink(udf_node, filesize, targetbuf, &length);
972 if (!error) {
973 vap->va_size = length;
974 KASSERT(length == strlen(targetbuf));
975 }
976 free(targetbuf, M_UDFTEMP);
977 /* XXX return error? */
978 }
979
980 /* access times */
981 udf_timestamp_to_timespec(ump, atime, &vap->va_atime);
982 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime);
983 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime);
984 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime);
985
986 vap->va_gen = 1; /* no multiple generations yes (!?) */
987 vap->va_flags = 0; /* no flags */
988 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size;
989 vap->va_filerev = 1; /* TODO file revision numbers? */
990 vap->va_vaflags = 0;
991 /* TODO get vaflags from the extended attributes? */
992
993 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) {
994 error = udf_extattr_search_intern(udf_node,
995 UDF_DEVICESPEC_ATTR_NO, "",
996 &offset, &a_l);
997 /* if error, deny access */
998 if (error || (filedata == NULL)) {
999 vap->va_mode = 0; /* or v_type = VNON? */
1000 } else {
1001 devattr = (struct device_extattr_entry *)
1002 filedata + offset;
1003 vap->va_rdev = makedev(
1004 udf_rw32(devattr->major),
1005 udf_rw32(devattr->minor)
1006 );
1007 /* TODO we could check the implementator */
1008 }
1009 }
1010
1011 return 0;
1012 }
1013
1014 /* --------------------------------------------------------------------- */
1015
1016 static int
udf_chown(struct vnode * vp,uid_t new_uid,gid_t new_gid,kauth_cred_t cred)1017 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid,
1018 kauth_cred_t cred)
1019 {
1020 struct udf_node *udf_node = VTOI(vp);
1021 uid_t uid;
1022 gid_t gid;
1023 int error;
1024
1025 #ifdef notyet
1026 /* TODO get vaflags from the extended attributes? */
1027 /* Immutable or append-only files cannot be modified, either. */
1028 if (udf_node->flags & (IMMUTABLE | APPEND))
1029 return EPERM;
1030 #endif
1031
1032 if (vp->v_mount->mnt_flag & MNT_RDONLY)
1033 return EROFS;
1034
1035 /* retrieve old values */
1036 udf_getownership(udf_node, &uid, &gid);
1037
1038 /* only one could be specified */
1039 if (new_uid == VNOVAL)
1040 new_uid = uid;
1041 if (new_gid == VNOVAL)
1042 new_gid = gid;
1043
1044 /* check if we can fit it in an 32 bits */
1045 if ((uid_t) ((uint32_t) new_uid) != new_uid)
1046 return EINVAL;
1047 if ((gid_t) ((uint32_t) new_gid) != new_gid)
1048 return EINVAL;
1049
1050 /* check permissions */
1051 error = kauth_authorize_vnode(cred, KAUTH_VNODE_CHANGE_OWNERSHIP,
1052 vp, NULL, genfs_can_chown(cred, uid, gid, new_uid, new_gid));
1053 if (error)
1054 return (error);
1055
1056 /* change the ownership */
1057 udf_setownership(udf_node, new_uid, new_gid);
1058
1059 /* mark node changed */
1060 udf_node->i_flags |= IN_CHANGE;
1061
1062 return 0;
1063 }
1064
1065
1066 static int
udf_chmod(struct vnode * vp,mode_t mode,kauth_cred_t cred)1067 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred)
1068 {
1069 struct udf_node *udf_node = VTOI(vp);
1070 uid_t uid;
1071 gid_t gid;
1072 int error;
1073
1074 #ifdef notyet
1075 /* TODO get vaflags from the extended attributes? */
1076 /* Immutable or append-only files cannot be modified, either. */
1077 if (udf_node->flags & (IMMUTABLE | APPEND))
1078 return EPERM;
1079 #endif
1080
1081 if (vp->v_mount->mnt_flag & MNT_RDONLY)
1082 return EROFS;
1083
1084 /* retrieve uid/gid values */
1085 udf_getownership(udf_node, &uid, &gid);
1086
1087 /* check permissions */
1088 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, vp,
1089 NULL, genfs_can_chmod(vp->v_type, cred, uid, gid, mode));
1090 if (error)
1091 return (error);
1092
1093 /* change mode */
1094 udf_setaccessmode(udf_node, mode);
1095
1096 /* mark node changed */
1097 udf_node->i_flags |= IN_CHANGE;
1098
1099 return 0;
1100 }
1101
1102
1103 /* exported */
1104 int
udf_chsize(struct vnode * vp,u_quad_t newsize,kauth_cred_t cred)1105 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred)
1106 {
1107 struct udf_node *udf_node = VTOI(vp);
1108 int error, extended;
1109
1110 if (vp->v_mount->mnt_flag & MNT_RDONLY)
1111 return EROFS;
1112
1113 /* Decide whether this is a valid operation based on the file type. */
1114 switch (vp->v_type) {
1115 case VDIR:
1116 return EISDIR;
1117 case VREG:
1118 if (vp->v_mount->mnt_flag & MNT_RDONLY)
1119 return EROFS;
1120 break;
1121 case VBLK:
1122 /* FALLTHROUGH */
1123 case VCHR:
1124 /* FALLTHROUGH */
1125 case VFIFO:
1126 /* Allow modifications of special files even if in the file
1127 * system is mounted read-only (we are not modifying the
1128 * files themselves, but the objects they represent). */
1129 return 0;
1130 default:
1131 /* Anything else is unsupported. */
1132 return EOPNOTSUPP;
1133 }
1134
1135 #if notyet
1136 /* TODO get vaflags from the extended attributes? */
1137 /* Immutable or append-only files cannot be modified, either. */
1138 if (node->flags & (IMMUTABLE | APPEND))
1139 return EPERM;
1140 #endif
1141
1142 /* resize file to the requested size */
1143 error = udf_resize_node(udf_node, newsize, &extended);
1144
1145 if (error == 0) {
1146 /* mark change */
1147 udf_node->i_flags |= IN_CHANGE | IN_MODIFY;
1148 if (vp->v_mount->mnt_flag & MNT_RELATIME)
1149 udf_node->i_flags |= IN_ACCESS;
1150 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0));
1151 udf_update(vp, NULL, NULL, NULL, 0);
1152 }
1153
1154 return error;
1155 }
1156
1157
1158 static int
udf_chflags(struct vnode * vp,mode_t mode,kauth_cred_t cred)1159 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred)
1160 {
1161 if (vp->v_mount->mnt_flag & MNT_RDONLY)
1162 return EROFS;
1163
1164 /*
1165 * XXX we can't do this yet, as its not described in the standard yet
1166 */
1167
1168 return EOPNOTSUPP;
1169 }
1170
1171
1172 static int
udf_chtimes(struct vnode * vp,struct timespec * atime,struct timespec * mtime,struct timespec * birthtime,int setattrflags,kauth_cred_t cred)1173 udf_chtimes(struct vnode *vp,
1174 struct timespec *atime, struct timespec *mtime,
1175 struct timespec *birthtime, int setattrflags,
1176 kauth_cred_t cred)
1177 {
1178 struct udf_node *udf_node = VTOI(vp);
1179 uid_t uid;
1180 gid_t gid;
1181 int error;
1182
1183 #ifdef notyet
1184 /* TODO get vaflags from the extended attributes? */
1185 /* Immutable or append-only files cannot be modified, either. */
1186 if (udf_node->flags & (IMMUTABLE | APPEND))
1187 return EPERM;
1188 #endif
1189
1190 if (vp->v_mount->mnt_flag & MNT_RDONLY)
1191 return EROFS;
1192
1193 /* retrieve uid/gid values */
1194 udf_getownership(udf_node, &uid, &gid);
1195
1196 /* check permissions */
1197 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp,
1198 NULL, genfs_can_chtimes(vp, setattrflags, uid, cred));
1199 if (error)
1200 return (error);
1201
1202 /* update node flags depending on what times are passed */
1203 if (atime->tv_sec != VNOVAL)
1204 if (!(vp->v_mount->mnt_flag & MNT_NOATIME))
1205 udf_node->i_flags |= IN_ACCESS;
1206 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) {
1207 udf_node->i_flags |= IN_CHANGE | IN_UPDATE;
1208 if (vp->v_mount->mnt_flag & MNT_RELATIME)
1209 udf_node->i_flags |= IN_ACCESS;
1210 }
1211
1212 return udf_update(vp, atime, mtime, birthtime, 0);
1213 }
1214
1215
1216 int
udf_setattr(void * v)1217 udf_setattr(void *v)
1218 {
1219 struct vop_setattr_args /* {
1220 struct vnode *a_vp;
1221 struct vattr *a_vap;
1222 kauth_cred_t a_cred;
1223 struct lwp *a_l;
1224 } */ *ap = v;
1225 struct vnode *vp = ap->a_vp;
1226 /* struct udf_node *udf_node = VTOI(vp); */
1227 /* struct udf_mount *ump = udf_node->ump; */
1228 kauth_cred_t cred = ap->a_cred;
1229 struct vattr *vap = ap->a_vap;
1230 int error;
1231
1232 DPRINTF(CALL, ("udf_setattr called\n"));
1233
1234 /* Abort if any unsettable attribute is given. */
1235 error = 0;
1236 if (vap->va_type != VNON ||
1237 vap->va_nlink != VNOVAL ||
1238 vap->va_fsid != VNOVAL ||
1239 vap->va_fileid != VNOVAL ||
1240 vap->va_blocksize != VNOVAL ||
1241 #ifdef notyet
1242 /* checks are debated */
1243 vap->va_ctime.tv_sec != VNOVAL ||
1244 vap->va_ctime.tv_nsec != VNOVAL ||
1245 vap->va_birthtime.tv_sec != VNOVAL ||
1246 vap->va_birthtime.tv_nsec != VNOVAL ||
1247 #endif
1248 vap->va_gen != VNOVAL ||
1249 vap->va_rdev != VNOVAL ||
1250 vap->va_bytes != VNOVAL)
1251 error = EINVAL;
1252
1253 DPRINTF(ATTR, ("setattr changing:\n"));
1254 if (error == 0 && (vap->va_flags != VNOVAL)) {
1255 DPRINTF(ATTR, ("\tchflags\n"));
1256 error = udf_chflags(vp, vap->va_flags, cred);
1257 }
1258
1259 if (error == 0 && (vap->va_size != VNOVAL)) {
1260 DPRINTF(ATTR, ("\tchsize\n"));
1261 error = udf_chsize(vp, vap->va_size, cred);
1262 }
1263
1264 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) {
1265 DPRINTF(ATTR, ("\tchown\n"));
1266 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred);
1267 }
1268
1269 if (error == 0 && (vap->va_mode != VNOVAL)) {
1270 DPRINTF(ATTR, ("\tchmod\n"));
1271 error = udf_chmod(vp, vap->va_mode, cred);
1272 }
1273
1274 if (error == 0 &&
1275 ((vap->va_atime.tv_sec != VNOVAL &&
1276 vap->va_atime.tv_nsec != VNOVAL) ||
1277 (vap->va_mtime.tv_sec != VNOVAL &&
1278 vap->va_mtime.tv_nsec != VNOVAL))
1279 ) {
1280 DPRINTF(ATTR, ("\tchtimes\n"));
1281 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime,
1282 &vap->va_birthtime, vap->va_vaflags, cred);
1283 }
1284 VN_KNOTE(vp, NOTE_ATTRIB);
1285
1286 return error;
1287 }
1288
1289 /* --------------------------------------------------------------------- */
1290
1291 /*
1292 * Return POSIX pathconf information for UDF file systems.
1293 */
1294 int
udf_pathconf(void * v)1295 udf_pathconf(void *v)
1296 {
1297 struct vop_pathconf_args /* {
1298 struct vnode *a_vp;
1299 int a_name;
1300 register_t *a_retval;
1301 } */ *ap = v;
1302 uint32_t bits;
1303
1304 DPRINTF(CALL, ("udf_pathconf called\n"));
1305
1306 switch (ap->a_name) {
1307 case _PC_LINK_MAX:
1308 *ap->a_retval = (1<<16)-1; /* 16 bits */
1309 return 0;
1310 case _PC_NAME_MAX:
1311 *ap->a_retval = UDF_MAXNAMLEN;
1312 return 0;
1313 case _PC_PATH_MAX:
1314 *ap->a_retval = PATH_MAX;
1315 return 0;
1316 case _PC_PIPE_BUF:
1317 *ap->a_retval = PIPE_BUF;
1318 return 0;
1319 case _PC_CHOWN_RESTRICTED:
1320 *ap->a_retval = 1;
1321 return 0;
1322 case _PC_NO_TRUNC:
1323 *ap->a_retval = 1;
1324 return 0;
1325 case _PC_SYNC_IO:
1326 *ap->a_retval = 0; /* synchronised is off for performance */
1327 return 0;
1328 case _PC_FILESIZEBITS:
1329 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */
1330 bits = 64; /* XXX ought to deliver 65 */
1331 #if 0
1332 if (udf_node)
1333 bits = 64 * vp->v_mount->mnt_dev_bshift;
1334 #endif
1335 *ap->a_retval = bits;
1336 return 0;
1337 }
1338
1339 return EINVAL;
1340 }
1341
1342
1343 /* --------------------------------------------------------------------- */
1344
1345 int
udf_open(void * v)1346 udf_open(void *v)
1347 {
1348 struct vop_open_args /* {
1349 struct vnode *a_vp;
1350 int a_mode;
1351 kauth_cred_t a_cred;
1352 struct proc *a_p;
1353 } */ *ap = v;
1354 int flags;
1355
1356 DPRINTF(CALL, ("udf_open called\n"));
1357
1358 /*
1359 * Files marked append-only must be opened for appending.
1360 * TODO: get chflags(2) flags from extened attribute.
1361 */
1362 flags = 0;
1363 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE)
1364 return (EPERM);
1365
1366 return 0;
1367 }
1368
1369
1370 /* --------------------------------------------------------------------- */
1371
1372 int
udf_close(void * v)1373 udf_close(void *v)
1374 {
1375 struct vop_close_args /* {
1376 struct vnode *a_vp;
1377 int a_fflag;
1378 kauth_cred_t a_cred;
1379 struct proc *a_p;
1380 } */ *ap = v;
1381 struct vnode *vp = ap->a_vp;
1382 struct udf_node *udf_node = VTOI(vp);
1383 int async = vp->v_mount->mnt_flag & MNT_ASYNC;
1384 int error;
1385
1386 DPRINTF(CALL, ("udf_close called\n"));
1387 udf_node = udf_node; /* shut up gcc */
1388
1389 if (!async && (vp->v_type != VDIR)) {
1390 mutex_enter(vp->v_interlock);
1391 error = VOP_PUTPAGES(vp, 0, 0, PGO_CLEANIT);
1392 if (error)
1393 return error;
1394 }
1395
1396 mutex_enter(vp->v_interlock);
1397 if (vp->v_usecount > 1)
1398 udf_itimes(udf_node, NULL, NULL, NULL);
1399 mutex_exit(vp->v_interlock);
1400
1401 return 0;
1402 }
1403
1404
1405 /* --------------------------------------------------------------------- */
1406
1407 static int
udf_check_possible(struct vnode * vp,struct vattr * vap,mode_t mode)1408 udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode)
1409 {
1410 int flags;
1411
1412 /* check if we are allowed to write */
1413 switch (vap->va_type) {
1414 case VDIR:
1415 case VLNK:
1416 case VREG:
1417 /*
1418 * normal nodes: check if we're on a read-only mounted
1419 * filingsystem and bomb out if we're trying to write.
1420 */
1421 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY))
1422 return EROFS;
1423 break;
1424 case VBLK:
1425 case VCHR:
1426 case VSOCK:
1427 case VFIFO:
1428 /*
1429 * special nodes: even on read-only mounted filingsystems
1430 * these are allowed to be written to if permissions allow.
1431 */
1432 break;
1433 default:
1434 /* no idea what this is */
1435 return EINVAL;
1436 }
1437
1438 /* noone may write immutable files */
1439 /* TODO: get chflags(2) flags from extened attribute. */
1440 flags = 0;
1441 if ((mode & VWRITE) && (flags & IMMUTABLE))
1442 return EPERM;
1443
1444 return 0;
1445 }
1446
1447 static int
udf_check_permitted(struct vnode * vp,struct vattr * vap,mode_t mode,kauth_cred_t cred)1448 udf_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode,
1449 kauth_cred_t cred)
1450 {
1451 /* ask the generic genfs_can_access to advice on security */
1452 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode,
1453 vp->v_type, vap->va_mode), vp, NULL, genfs_can_access(vp->v_type,
1454 vap->va_mode, vap->va_uid, vap->va_gid, mode, cred));
1455 }
1456
1457 int
udf_access(void * v)1458 udf_access(void *v)
1459 {
1460 struct vop_access_args /* {
1461 struct vnode *a_vp;
1462 int a_mode;
1463 kauth_cred_t a_cred;
1464 struct proc *a_p;
1465 } */ *ap = v;
1466 struct vnode *vp = ap->a_vp;
1467 mode_t mode = ap->a_mode;
1468 kauth_cred_t cred = ap->a_cred;
1469 /* struct udf_node *udf_node = VTOI(vp); */
1470 struct vattr vap;
1471 int error;
1472
1473 DPRINTF(CALL, ("udf_access called\n"));
1474
1475 error = VOP_GETATTR(vp, &vap, NULL);
1476 if (error)
1477 return error;
1478
1479 error = udf_check_possible(vp, &vap, mode);
1480 if (error)
1481 return error;
1482
1483 error = udf_check_permitted(vp, &vap, mode, cred);
1484
1485 return error;
1486 }
1487
1488 /* --------------------------------------------------------------------- */
1489
1490 int
udf_create(void * v)1491 udf_create(void *v)
1492 {
1493 struct vop_create_v3_args /* {
1494 struct vnode *a_dvp;
1495 struct vnode **a_vpp;
1496 struct componentname *a_cnp;
1497 struct vattr *a_vap;
1498 } */ *ap = v;
1499 struct vnode *dvp = ap->a_dvp;
1500 struct vnode **vpp = ap->a_vpp;
1501 struct vattr *vap = ap->a_vap;
1502 struct componentname *cnp = ap->a_cnp;
1503 int error;
1504
1505 DPRINTF(CALL, ("udf_create called\n"));
1506 error = udf_create_node(dvp, vpp, vap, cnp);
1507
1508 return error;
1509 }
1510
1511 /* --------------------------------------------------------------------- */
1512
1513 int
udf_mknod(void * v)1514 udf_mknod(void *v)
1515 {
1516 struct vop_mknod_v3_args /* {
1517 struct vnode *a_dvp;
1518 struct vnode **a_vpp;
1519 struct componentname *a_cnp;
1520 struct vattr *a_vap;
1521 } */ *ap = v;
1522 struct vnode *dvp = ap->a_dvp;
1523 struct vnode **vpp = ap->a_vpp;
1524 struct vattr *vap = ap->a_vap;
1525 struct componentname *cnp = ap->a_cnp;
1526 int error;
1527
1528 DPRINTF(CALL, ("udf_mknod called\n"));
1529 error = udf_create_node(dvp, vpp, vap, cnp);
1530
1531 return error;
1532 }
1533
1534 /* --------------------------------------------------------------------- */
1535
1536 int
udf_mkdir(void * v)1537 udf_mkdir(void *v)
1538 {
1539 struct vop_mkdir_v3_args /* {
1540 struct vnode *a_dvp;
1541 struct vnode **a_vpp;
1542 struct componentname *a_cnp;
1543 struct vattr *a_vap;
1544 } */ *ap = v;
1545 struct vnode *dvp = ap->a_dvp;
1546 struct vnode **vpp = ap->a_vpp;
1547 struct vattr *vap = ap->a_vap;
1548 struct componentname *cnp = ap->a_cnp;
1549 int error;
1550
1551 DPRINTF(CALL, ("udf_mkdir called\n"));
1552 error = udf_create_node(dvp, vpp, vap, cnp);
1553
1554 return error;
1555 }
1556
1557 /* --------------------------------------------------------------------- */
1558
1559 static int
udf_do_link(struct vnode * dvp,struct vnode * vp,struct componentname * cnp)1560 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
1561 {
1562 struct udf_node *udf_node, *dir_node;
1563 struct vattr vap;
1564 int error;
1565
1566 DPRINTF(CALL, ("udf_link called\n"));
1567 KASSERT(dvp != vp);
1568 KASSERT(vp->v_type != VDIR);
1569 KASSERT(dvp->v_mount == vp->v_mount);
1570
1571 /* get attributes */
1572 dir_node = VTOI(dvp);
1573 udf_node = VTOI(vp);
1574
1575 error = VOP_GETATTR(vp, &vap, FSCRED);
1576 if (error) {
1577 VOP_UNLOCK(vp);
1578 return error;
1579 }
1580
1581 /* check link count overflow */
1582 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */
1583 VOP_UNLOCK(vp);
1584 return EMLINK;
1585 }
1586
1587 error = udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp);
1588 if (error)
1589 VOP_UNLOCK(vp);
1590 return error;
1591 }
1592
1593 int
udf_link(void * v)1594 udf_link(void *v)
1595 {
1596 struct vop_link_v2_args /* {
1597 struct vnode *a_dvp;
1598 struct vnode *a_vp;
1599 struct componentname *a_cnp;
1600 } */ *ap = v;
1601 struct vnode *dvp = ap->a_dvp;
1602 struct vnode *vp = ap->a_vp;
1603 struct componentname *cnp = ap->a_cnp;
1604 int error;
1605
1606 error = udf_do_link(dvp, vp, cnp);
1607 if (error)
1608 VOP_ABORTOP(dvp, cnp);
1609
1610 VN_KNOTE(vp, NOTE_LINK);
1611 VN_KNOTE(dvp, NOTE_WRITE);
1612
1613 return error;
1614 }
1615
1616 /* --------------------------------------------------------------------- */
1617
1618 static int
udf_do_symlink(struct udf_node * udf_node,char * target)1619 udf_do_symlink(struct udf_node *udf_node, char *target)
1620 {
1621 struct pathcomp pathcomp;
1622 uint8_t *pathbuf, *pathpos, *compnamepos;
1623 char *mntonname;
1624 int pathlen, len, compnamelen, mntonnamelen;
1625 int error;
1626
1627 /* process `target' to an UDF structure */
1628 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK);
1629 pathpos = pathbuf;
1630 pathlen = 0;
1631
1632 if (*target == '/') {
1633 /* symlink starts from the root */
1634 len = UDF_PATH_COMP_SIZE;
1635 memset(&pathcomp, 0, len);
1636 pathcomp.type = UDF_PATH_COMP_ROOT;
1637
1638 /* check if its mount-point relative! */
1639 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname;
1640 mntonnamelen = strlen(mntonname);
1641 if (strlen(target) >= mntonnamelen) {
1642 if (strncmp(target, mntonname, mntonnamelen) == 0) {
1643 pathcomp.type = UDF_PATH_COMP_MOUNTROOT;
1644 target += mntonnamelen;
1645 }
1646 } else {
1647 target++;
1648 }
1649
1650 memcpy(pathpos, &pathcomp, len);
1651 pathpos += len;
1652 pathlen += len;
1653 }
1654
1655 error = 0;
1656 while (*target) {
1657 /* ignore multiple '/' */
1658 while (*target == '/') {
1659 target++;
1660 }
1661 if (!*target)
1662 break;
1663
1664 /* extract component name */
1665 compnamelen = 0;
1666 compnamepos = target;
1667 while ((*target) && (*target != '/')) {
1668 target++;
1669 compnamelen++;
1670 }
1671
1672 /* just trunc if too long ?? (security issue) */
1673 if (compnamelen >= 127) {
1674 error = ENAMETOOLONG;
1675 break;
1676 }
1677
1678 /* convert unix name to UDF name */
1679 len = sizeof(struct pathcomp);
1680 memset(&pathcomp, 0, len);
1681 pathcomp.type = UDF_PATH_COMP_NAME;
1682 len = UDF_PATH_COMP_SIZE;
1683
1684 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0))
1685 pathcomp.type = UDF_PATH_COMP_PARENTDIR;
1686 if ((compnamelen == 1) && (*compnamepos == '.'))
1687 pathcomp.type = UDF_PATH_COMP_CURDIR;
1688
1689 if (pathcomp.type == UDF_PATH_COMP_NAME) {
1690 unix_to_udf_name(
1691 (char *) &pathcomp.ident, &pathcomp.l_ci,
1692 compnamepos, compnamelen,
1693 &udf_node->ump->logical_vol->desc_charset);
1694 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci;
1695 }
1696
1697 if (pathlen + len >= UDF_SYMLINKBUFLEN) {
1698 error = ENAMETOOLONG;
1699 break;
1700 }
1701
1702 memcpy(pathpos, &pathcomp, len);
1703 pathpos += len;
1704 pathlen += len;
1705 }
1706
1707 if (error) {
1708 /* aparently too big */
1709 free(pathbuf, M_UDFTEMP);
1710 return error;
1711 }
1712
1713 error = udf_grow_node(udf_node, pathlen);
1714 if (error) {
1715 /* failed to pregrow node */
1716 free(pathbuf, M_UDFTEMP);
1717 return error;
1718 }
1719
1720 /* write out structure on the new file */
1721 error = vn_rdwr(UIO_WRITE, udf_node->vnode,
1722 pathbuf, pathlen, 0,
1723 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS,
1724 FSCRED, NULL, NULL);
1725
1726 /* return status of symlink contents writeout */
1727 free(pathbuf, M_UDFTEMP);
1728 return error;
1729 }
1730
1731
1732 int
udf_symlink(void * v)1733 udf_symlink(void *v)
1734 {
1735 struct vop_symlink_v3_args /* {
1736 struct vnode *a_dvp;
1737 struct vnode **a_vpp;
1738 struct componentname *a_cnp;
1739 struct vattr *a_vap;
1740 char *a_target;
1741 } */ *ap = v;
1742 struct vnode *dvp = ap->a_dvp;
1743 struct vnode **vpp = ap->a_vpp;
1744 struct vattr *vap = ap->a_vap;
1745 struct componentname *cnp = ap->a_cnp;
1746 struct udf_node *dir_node;
1747 struct udf_node *udf_node;
1748 int error;
1749
1750 DPRINTF(CALL, ("udf_symlink called\n"));
1751 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target));
1752 error = udf_create_node(dvp, vpp, vap, cnp);
1753 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL))));
1754 if (!error) {
1755 dir_node = VTOI(dvp);
1756 udf_node = VTOI(*vpp);
1757 KASSERT(udf_node);
1758 error = udf_do_symlink(udf_node, ap->a_target);
1759 if (error) {
1760 /* remove node */
1761 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp);
1762 vrele(*vpp);
1763 *vpp = NULL;
1764 }
1765 }
1766 return error;
1767 }
1768
1769 /* --------------------------------------------------------------------- */
1770
1771 static int
udf_do_readlink(struct udf_node * udf_node,uint64_t filesize,uint8_t * targetbuf,int * length)1772 udf_do_readlink(struct udf_node *udf_node, uint64_t filesize,
1773 uint8_t *targetbuf, int *length)
1774 {
1775 struct pathcomp pathcomp;
1776 uint8_t *pathbuf, *tmpname;
1777 uint8_t *pathpos, *targetpos;
1778 char *mntonname;
1779 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci;
1780 int first, error;
1781
1782 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK);
1783 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK);
1784 memset(pathbuf, 0, UDF_SYMLINKBUFLEN);
1785 memset(targetbuf, 0, PATH_MAX);
1786
1787 /* read contents of file in our temporary buffer */
1788 error = vn_rdwr(UIO_READ, udf_node->vnode,
1789 pathbuf, filesize, 0,
1790 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS,
1791 FSCRED, NULL, NULL);
1792 if (error) {
1793 /* failed to read in symlink contents */
1794 free(pathbuf, M_UDFTEMP);
1795 free(tmpname, M_UDFTEMP);
1796 return error;
1797 }
1798
1799 /* convert to a unix path */
1800 pathpos = pathbuf;
1801 pathlen = 0;
1802 targetpos = targetbuf;
1803 targetlen = PATH_MAX;
1804 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname;
1805 mntonnamelen = strlen(mntonname);
1806
1807 error = 0;
1808 first = 1;
1809 while (filesize - pathlen >= UDF_PATH_COMP_SIZE) {
1810 len = UDF_PATH_COMP_SIZE;
1811 memcpy(&pathcomp, pathpos, len);
1812 l_ci = pathcomp.l_ci;
1813 switch (pathcomp.type) {
1814 case UDF_PATH_COMP_ROOT :
1815 /* XXX should check for l_ci; bugcompatible now */
1816 if ((targetlen < 1) || !first) {
1817 error = EINVAL;
1818 break;
1819 }
1820 *targetpos++ = '/'; targetlen--;
1821 break;
1822 case UDF_PATH_COMP_MOUNTROOT :
1823 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */
1824 if (l_ci || (targetlen < mntonnamelen+1) || !first) {
1825 error = EINVAL;
1826 break;
1827 }
1828 memcpy(targetpos, mntonname, mntonnamelen);
1829 targetpos += mntonnamelen; targetlen -= mntonnamelen;
1830 if (filesize-pathlen > UDF_PATH_COMP_SIZE+l_ci) {
1831 /* more follows, so must be directory */
1832 *targetpos++ = '/'; targetlen--;
1833 }
1834 break;
1835 case UDF_PATH_COMP_PARENTDIR :
1836 /* XXX should check for l_ci; bugcompatible now */
1837 if (targetlen < 3) {
1838 error = EINVAL;
1839 break;
1840 }
1841 *targetpos++ = '.'; targetlen--;
1842 *targetpos++ = '.'; targetlen--;
1843 *targetpos++ = '/'; targetlen--;
1844 break;
1845 case UDF_PATH_COMP_CURDIR :
1846 /* XXX should check for l_ci; bugcompatible now */
1847 if (targetlen < 2) {
1848 error = EINVAL;
1849 break;
1850 }
1851 *targetpos++ = '.'; targetlen--;
1852 *targetpos++ = '/'; targetlen--;
1853 break;
1854 case UDF_PATH_COMP_NAME :
1855 if (l_ci == 0) {
1856 error = EINVAL;
1857 break;
1858 }
1859 memset(tmpname, 0, PATH_MAX);
1860 memcpy(&pathcomp, pathpos, len + l_ci);
1861 udf_to_unix_name(tmpname, MAXPATHLEN,
1862 pathcomp.ident, l_ci,
1863 &udf_node->ump->logical_vol->desc_charset);
1864 namelen = strlen(tmpname);
1865 if (targetlen < namelen + 1) {
1866 error = EINVAL;
1867 break;
1868 }
1869 memcpy(targetpos, tmpname, namelen);
1870 targetpos += namelen; targetlen -= namelen;
1871 if (filesize-pathlen > UDF_PATH_COMP_SIZE+l_ci) {
1872 /* more follows, so must be directory */
1873 *targetpos++ = '/'; targetlen--;
1874 }
1875 break;
1876 default :
1877 error = EINVAL;
1878 break;
1879 }
1880 first = 0;
1881 if (error)
1882 break;
1883 pathpos += UDF_PATH_COMP_SIZE + l_ci;
1884 pathlen += UDF_PATH_COMP_SIZE + l_ci;
1885
1886 }
1887 /* all processed? */
1888 if (filesize - pathlen > 0)
1889 error = EINVAL;
1890
1891 free(pathbuf, M_UDFTEMP);
1892 free(tmpname, M_UDFTEMP);
1893
1894 *length = PATH_MAX - targetlen;
1895 return error;
1896 }
1897
1898
1899 int
udf_readlink(void * v)1900 udf_readlink(void *v)
1901 {
1902 struct vop_readlink_args /* {
1903 struct vnode *a_vp;
1904 struct uio *a_uio;
1905 kauth_cred_t a_cred;
1906 } */ *ap = v;
1907 struct vnode *vp = ap->a_vp;
1908 struct udf_node *udf_node = VTOI(vp);
1909 struct file_entry *fe = udf_node->fe;
1910 struct extfile_entry *efe = udf_node->efe;
1911 struct uio *uio = ap->a_uio;
1912 uint64_t filesize;
1913 uint8_t *targetbuf;
1914 int length;
1915 int error;
1916
1917 DPRINTF(CALL, ("udf_readlink called\n"));
1918
1919 if (fe) {
1920 filesize = udf_rw64(fe->inf_len);
1921 } else {
1922 assert(udf_node->efe);
1923 filesize = udf_rw64(efe->inf_len);
1924 }
1925
1926 /* claim temporary buffers for translation */
1927 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK);
1928
1929 error = udf_do_readlink(udf_node, filesize, targetbuf, &length);
1930
1931 /* uiomove() to destination */
1932 if (!error)
1933 uiomove(targetbuf, length, uio);
1934
1935 free(targetbuf, M_UDFTEMP);
1936 return error;
1937 }
1938
1939 /* --------------------------------------------------------------------- */
1940
1941 /*
1942 * udf_rename() moved to udf_rename.c
1943 */
1944
1945 /* --------------------------------------------------------------------- */
1946
1947 int
udf_remove(void * v)1948 udf_remove(void *v)
1949 {
1950 struct vop_remove_args /* {
1951 struct vnode *a_dvp;
1952 struct vnode *a_vp;
1953 struct componentname *a_cnp;
1954 } */ *ap = v;
1955 struct vnode *dvp = ap->a_dvp;
1956 struct vnode *vp = ap->a_vp;
1957 struct componentname *cnp = ap->a_cnp;
1958 struct udf_node *dir_node = VTOI(dvp);
1959 struct udf_node *udf_node = VTOI(vp);
1960 struct udf_mount *ump = dir_node->ump;
1961 int error;
1962
1963 DPRINTF(CALL, ("udf_remove called\n"));
1964 if (vp->v_type != VDIR) {
1965 error = udf_dir_detach(ump, dir_node, udf_node, cnp);
1966 DPRINTFIF(NODE, error, ("\tgot error removing file\n"));
1967 } else {
1968 DPRINTF(NODE, ("\tis a directory: perm. denied\n"));
1969 error = EPERM;
1970 }
1971
1972 if (error == 0) {
1973 VN_KNOTE(vp, NOTE_DELETE);
1974 VN_KNOTE(dvp, NOTE_WRITE);
1975 }
1976
1977 if (dvp == vp)
1978 vrele(vp);
1979 else
1980 vput(vp);
1981 vput(dvp);
1982
1983 return error;
1984 }
1985
1986 /* --------------------------------------------------------------------- */
1987
1988 int
udf_rmdir(void * v)1989 udf_rmdir(void *v)
1990 {
1991 struct vop_rmdir_args /* {
1992 struct vnode *a_dvp;
1993 struct vnode *a_vp;
1994 struct componentname *a_cnp;
1995 } */ *ap = v;
1996 struct vnode *vp = ap->a_vp;
1997 struct vnode *dvp = ap->a_dvp;
1998 struct componentname *cnp = ap->a_cnp;
1999 struct udf_node *dir_node = VTOI(dvp);
2000 struct udf_node *udf_node = VTOI(vp);
2001 struct udf_mount *ump = dir_node->ump;
2002 int error, isempty;
2003
2004 DPRINTF(NOTIMPL, ("udf_rmdir '%s' called\n", cnp->cn_nameptr));
2005
2006 /* don't allow '.' to be deleted */
2007 if (dir_node == udf_node) {
2008 vrele(dvp);
2009 vput(vp);
2010 return EINVAL;
2011 }
2012
2013 /* make sure our `leaf' node's hash is populated */
2014 dirhash_get(&udf_node->dir_hash);
2015 error = udf_dirhash_fill(udf_node);
2016 if (error) {
2017 dirhash_put(udf_node->dir_hash);
2018 return error;
2019 }
2020
2021 /* check to see if the directory is empty */
2022 isempty = dirhash_dir_isempty(udf_node->dir_hash);
2023 dirhash_put(udf_node->dir_hash);
2024
2025 if (!isempty) {
2026 vput(dvp);
2027 vput(vp);
2028 return ENOTEMPTY;
2029 }
2030
2031 /* detach the node from the directory, udf_node is an empty dir here */
2032 error = udf_dir_detach(ump, dir_node, udf_node, cnp);
2033 if (error == 0) {
2034 cache_purge(vp);
2035 // cache_purge(dvp); /* XXX from msdosfs, why? */
2036 /*
2037 * Bug alert: we need to remove '..' from the detaching
2038 * udf_node so further lookups of this are not possible. This
2039 * prevents a process in a deleted directory from going to its
2040 * deleted parent. Since `udf_node' is garanteed to be empty
2041 * here, trunc it so no fids are there.
2042 */
2043 dirhash_purge(&udf_node->dir_hash);
2044 udf_shrink_node(udf_node, 0);
2045 VN_KNOTE(vp, NOTE_DELETE);
2046 }
2047 DPRINTFIF(NODE, error, ("\tgot error removing dir\n"));
2048
2049 /* unput the nodes and exit */
2050 vput(dvp);
2051 vput(vp);
2052
2053 return error;
2054 }
2055
2056 /* --------------------------------------------------------------------- */
2057
2058 int
udf_fsync(void * v)2059 udf_fsync(void *v)
2060 {
2061 struct vop_fsync_args /* {
2062 struct vnode *a_vp;
2063 kauth_cred_t a_cred;
2064 int a_flags;
2065 off_t offlo;
2066 off_t offhi;
2067 struct proc *a_p;
2068 } */ *ap = v;
2069 struct vnode *vp = ap->a_vp;
2070 struct udf_node *udf_node = VTOI(vp);
2071 int error, flags, wait;
2072
2073 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n",
2074 udf_node,
2075 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait",
2076 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete"));
2077
2078 /* flush data and wait for it when requested */
2079 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0;
2080 error = vflushbuf(vp, ap->a_flags);
2081 if (error)
2082 return error;
2083
2084 if (udf_node == NULL) {
2085 printf("udf_fsync() called on NULL udf_node!\n");
2086 return 0;
2087 }
2088 if (vp->v_tag != VT_UDF) {
2089 printf("udf_fsync() called on node not tagged as UDF node!\n");
2090 return 0;
2091 }
2092
2093 /* set our times */
2094 udf_itimes(udf_node, NULL, NULL, NULL);
2095
2096 /* if called when mounted readonly, never write back */
2097 if (vp->v_mount->mnt_flag & MNT_RDONLY)
2098 return 0;
2099
2100 /* if only data is requested, return */
2101 if (ap->a_flags & FSYNC_DATAONLY)
2102 return 0;
2103
2104 /* check if the node is dirty 'enough'*/
2105 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED);
2106 if (flags == 0)
2107 return 0;
2108
2109 /* if we don't have to wait, check for IO pending */
2110 if (!wait) {
2111 if (vp->v_numoutput > 0) {
2112 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node));
2113 return 0;
2114 }
2115 if (udf_node->outstanding_bufs > 0) {
2116 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node));
2117 return 0;
2118 }
2119 if (udf_node->outstanding_nodedscr > 0) {
2120 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node));
2121 return 0;
2122 }
2123 }
2124
2125 /* wait until vp->v_numoutput reaches zero i.e. is finished */
2126 if (wait) {
2127 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node));
2128 mutex_enter(vp->v_interlock);
2129 while (vp->v_numoutput) {
2130 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput));
2131 cv_timedwait(&vp->v_cv, vp->v_interlock, hz/8);
2132 }
2133 mutex_exit(vp->v_interlock);
2134 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node));
2135 }
2136
2137 /* write out node and wait for it if requested */
2138 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node));
2139 error = udf_writeout_node(udf_node, wait);
2140 if (error)
2141 return error;
2142
2143 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */
2144
2145 return 0;
2146 }
2147
2148 /* --------------------------------------------------------------------- */
2149
2150 int
udf_advlock(void * v)2151 udf_advlock(void *v)
2152 {
2153 struct vop_advlock_args /* {
2154 struct vnode *a_vp;
2155 void *a_id;
2156 int a_op;
2157 struct flock *a_fl;
2158 int a_flags;
2159 } */ *ap = v;
2160 struct vnode *vp = ap->a_vp;
2161 struct udf_node *udf_node = VTOI(vp);
2162 struct file_entry *fe;
2163 struct extfile_entry *efe;
2164 uint64_t file_size;
2165
2166 DPRINTF(LOCKING, ("udf_advlock called\n"));
2167
2168 /* get directory filesize */
2169 if (udf_node->fe) {
2170 fe = udf_node->fe;
2171 file_size = udf_rw64(fe->inf_len);
2172 } else {
2173 assert(udf_node->efe);
2174 efe = udf_node->efe;
2175 file_size = udf_rw64(efe->inf_len);
2176 }
2177
2178 return lf_advlock(ap, &udf_node->lockf, file_size);
2179 }
2180
2181 /* --------------------------------------------------------------------- */
2182
2183 /* Global vfs vnode data structures for udfs */
2184 int (**udf_vnodeop_p)(void *);
2185
2186 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = {
2187 { &vop_default_desc, vn_default_error },
2188 { &vop_lookup_desc, udf_lookup }, /* lookup */
2189 { &vop_create_desc, udf_create }, /* create */
2190 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */
2191 { &vop_open_desc, udf_open }, /* open */
2192 { &vop_close_desc, udf_close }, /* close */
2193 { &vop_access_desc, udf_access }, /* access */
2194 { &vop_getattr_desc, udf_getattr }, /* getattr */
2195 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */
2196 { &vop_read_desc, udf_read }, /* read */
2197 { &vop_write_desc, udf_write }, /* write */ /* WRITE */
2198 { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */
2199 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */
2200 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */
2201 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */
2202 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */
2203 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */
2204 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */
2205 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */
2206 { &vop_fsync_desc, udf_fsync }, /* fsync */
2207 { &vop_seek_desc, genfs_seek }, /* seek */
2208 { &vop_remove_desc, udf_remove }, /* remove */
2209 { &vop_link_desc, udf_link }, /* link */ /* TODO */
2210 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */
2211 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */
2212 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */
2213 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */
2214 { &vop_readdir_desc, udf_readdir }, /* readdir */
2215 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */
2216 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */
2217 { &vop_inactive_desc, udf_inactive }, /* inactive */
2218 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */
2219 { &vop_lock_desc, genfs_lock }, /* lock */
2220 { &vop_unlock_desc, genfs_unlock }, /* unlock */
2221 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */
2222 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */
2223 /* { &vop_print_desc, udf_print }, */ /* print */
2224 { &vop_islocked_desc, genfs_islocked }, /* islocked */
2225 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */
2226 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */
2227 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */
2228 { &vop_getpages_desc, genfs_getpages }, /* getpages */
2229 { &vop_putpages_desc, genfs_putpages }, /* putpages */
2230 { NULL, NULL }
2231 };
2232
2233
2234 const struct vnodeopv_desc udf_vnodeop_opv_desc = {
2235 &udf_vnodeop_p, udf_vnodeop_entries
2236 };
2237