]> git.saurik.com Git - apple/hfs.git/blob - core/hfs_attrlist.c
projects / apple / hfs.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
hfs-366.1.1.tar.gz
[apple/hfs.git] / core / hfs_attrlist.c
1 /*
2 * Copyright (c) 2000-2015 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29 /*
30 * hfs_attrlist.c - HFS attribute list processing
31 *
32 * Copyright (c) 1998-2002, Apple Inc. All Rights Reserved.
33 */
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/malloc.h>
39 #include <sys/attr.h>
40 #include <sys/stat.h>
41 #include <sys/unistd.h>
42 #include <sys/vm.h>
43 #include <sys/kauth.h>
44 #include <sys/fsctl.h>
45
46 #include <kern/locks.h>
47
48 #include "hfs.h"
49 #include "hfs_cnode.h"
50 #include "hfs_mount.h"
51 #include "hfs_dbg.h"
52 #include "hfs_attrlist.h"
53 #include "hfs_btreeio.h"
54 #include "hfs_cprotect.h"
55
56 /* Packing routines: */
57
58 static void packnameattr(struct attrblock *abp, struct vnode *vp,
59 const u_int8_t *name, int namelen);
60
61 static void packcommonattr(struct attrblock *abp, struct hfsmount *hfsmp,
62 struct vnode *vp, struct cat_desc * cdp,
63 struct cat_attr * cap, struct vfs_context *ctx);
64
65 static void packfileattr(struct attrblock *abp, struct hfsmount *hfsmp,
66 struct cat_attr *cattrp, struct cat_fork *datafork,
67 struct cat_fork *rsrcfork, struct vnode *vp);
68
69 static void packdirattr(struct attrblock *abp, struct hfsmount *hfsmp,
70 struct vnode *vp, struct cat_desc * descp,
71 struct cat_attr * cattrp);
72
73 static u_int32_t hfs_real_user_access(vnode_t vp, vfs_context_t ctx);
74
75 static void get_vattr_data_for_attrs(struct attrlist *, struct vnode_attr *,
76 struct hfsmount *, struct vnode *, struct cat_desc *, struct cat_attr *,
77 struct cat_fork *, struct cat_fork *, vfs_context_t);
78
79 static void vattr_data_for_common_attrs(struct attrlist *, struct vnode_attr *,
80 struct hfsmount *, struct vnode *, struct cat_desc *, struct cat_attr *,
81 vfs_context_t);
82
83 static void vattr_data_for_dir_attrs(struct attrlist *, struct vnode_attr *,
84 struct hfsmount *, struct vnode *, struct cat_desc *, struct cat_attr *);
85
86 static void vattr_data_for_file_attrs(struct attrlist *, struct vnode_attr *,
87 struct hfsmount *, struct cat_attr *, struct cat_fork *, struct cat_fork *,
88 struct vnode *vp);
89
90 static int hfs_readdirattr_internal(struct vnode *, struct attrlist *,
91 struct vnode_attr *, uio_t, uint64_t, int, uint32_t *, int *, int *,
92 vfs_context_t);
93
94 /*
95 * readdirattr operation will return attributes for the items in the
96 * directory specified.
97 *
98 * It does not do . and .. entries. The problem is if you are at the root of the
99 * hfs directory and go to .. you could be crossing a mountpoint into a
100 * different (ufs) file system. The attributes that apply for it may not
101 * apply for the file system you are doing the readdirattr on. To make life
102 * simpler, this call will only return entries in its directory, hfs like.
103 */
104 int
105 hfs_vnop_readdirattr(ap)
106 struct vnop_readdirattr_args /* {
107 struct vnode *a_vp;
108 struct attrlist *a_alist;
109 struct uio *a_uio;
110 u_long a_maxcount;
111 u_long a_options;
112 u_long *a_newstate;
113 int *a_eofflag;
114 u_long *a_actualcount;
115 vfs_context_t a_context;
116 } */ *ap;
117 {
118 int error;
119 struct attrlist *alist = ap->a_alist;
120
121 /* Check for invalid options and buffer space. */
122 if (((ap->a_options & ~(FSOPT_NOINMEMUPDATE | FSOPT_NOFOLLOW)) != 0) ||
123 (ap->a_maxcount <= 0)) {
124 return (EINVAL);
125 }
126 /*
127 * Reject requests for unsupported attributes.
128 */
129 if ((alist->bitmapcount != ATTR_BIT_MAP_COUNT) ||
130 (alist->commonattr & ~HFS_ATTR_CMN_VALID) ||
131 (alist->volattr != 0) ||
132 (alist->dirattr & ~HFS_ATTR_DIR_VALID) ||
133 (alist->fileattr & ~HFS_ATTR_FILE_VALID) ||
134 (alist->forkattr != 0)) {
135 return (EINVAL);
136 }
137
138 error = hfs_readdirattr_internal(ap->a_vp, alist, NULL, ap->a_uio,
139 (uint64_t)ap->a_options, ap->a_maxcount, ap->a_newstate,
140 ap->a_eofflag, (int *)ap->a_actualcount, ap->a_context);
141
142 return (error);
143 }
144
145
146 /*
147 * getattrlistbulk, like readdirattr, will return attributes for the items in
148 * the directory specified.
149 *
150 * It does not do . and .. entries. The problem is if you are at the root of the
151 * hfs directory and go to .. you could be crossing a mountpoint into a
152 * different (ufs) file system. The attributes that apply for it may not
153 * apply for the file system you are doing the readdirattr on. To make life
154 * simpler, this call will only return entries in its directory, hfs like.
155 */
156 int
157 hfs_vnop_getattrlistbulk(ap)
158 struct vnop_getattrlistbulk_args /* {
159 struct vnodeop_desc *a_desc;
160 vnode_t a_vp;
161 struct attrlist *a_alist;
162 struct vnode_attr *a_vap;
163 struct uio *a_uio;
164 void *a_private;
165 uint64_t a_options;
166 int32_t *a_eofflag;
167 int32_t *a_actualcount;
168 vfs_context_t a_context;
169 } */ *ap;
170 {
171 int error = 0;
172
173 error = hfs_readdirattr_internal(ap->a_vp, ap->a_alist, ap->a_vap,
174 ap->a_uio, (uint64_t)ap->a_options, 0, NULL, ap->a_eofflag,
175 (int *)ap->a_actualcount, ap->a_context);
176
177 return (error);
178 }
179
180 /*
181 * Common function for both hfs_vnop_readdirattr and hfs_vnop_getattrlistbulk.
182 * This either fills in a vnode_attr structure or fills in an attrbute buffer
183 * Currently the difference in behaviour required for the two vnops is keyed
184 * on whether the passed in vnode_attr pointer is null or not. If the pointer
185 * is null we fill in buffer passed and if it is not null we fill in the fields
186 * of the vnode_attr structure.
187 */
188 int
189 hfs_readdirattr_internal(struct vnode *dvp, struct attrlist *alist,
190 struct vnode_attr *vap, uio_t uio, uint64_t options, int maxcount,
191 uint32_t *newstate, int *eofflag, int *actualcount, vfs_context_t ctx)
192 {
193 struct cnode *dcp;
194 struct hfsmount * hfsmp;
195 u_int32_t fixedblocksize;
196 u_int32_t maxattrblocksize = 0;
197 u_int32_t currattrbufsize;
198 void *attrbufptr = NULL;
199 void *attrptr = NULL;
200 void *varptr = NULL;
201 caddr_t namebuf = NULL;
202 struct attrblock attrblk;
203 int error = 0;
204 int index = 0;
205 int i = 0;
206 struct cat_desc *lastdescp = NULL;
207 struct cat_entrylist *ce_list = NULL;
208 directoryhint_t *dirhint = NULL;
209 unsigned int tag;
210 int maxentries = 0;
211 int lockflags;
212 u_int32_t dirchg = 0;
213 int reachedeof = 0;
214
215 *(actualcount) = 0;
216 *(eofflag) = 0;
217
218 if ((uio_resid(uio) <= 0) || (uio_iovcnt(uio) > 1))
219 return (EINVAL);
220
221 if (VTOC(dvp)->c_bsdflags & UF_COMPRESSED) {
222 int compressed = hfs_file_is_compressed(VTOC(dvp), 0); /* 0 == take the cnode lock */
223
224 if (!compressed) {
225 error = check_for_dataless_file(dvp, NAMESPACE_HANDLER_READ_OP);
226 if (error) {
227 return error;
228 }
229 }
230 }
231
232 /*
233 * Take an exclusive directory lock since we manipulate the directory hints
234 */
235 if ((error = hfs_lock(VTOC(dvp), HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT))) {
236 return (error);
237 }
238 dcp = VTOC(dvp);
239 hfsmp = VTOHFS(dvp);
240
241 dirchg = dcp->c_dirchangecnt;
242
243 /* Extract directory index and tag (sequence number) from uio_offset */
244 index = uio_offset(uio) & HFS_INDEX_MASK;
245 tag = uio_offset(uio) & ~HFS_INDEX_MASK;
246
247 /*
248 * We can't just use the valence as an optimization to avoid
249 * going to the catalog. It might be wrong (== 0), and that would
250 * cause us to avoid iterating the directory when it might actually have
251 * contents. Instead, use the catalog to tell us when we've hit EOF
252 * for this directory
253 */
254
255 /* Get a buffer to hold packed attributes. */
256 fixedblocksize = (sizeof(u_int32_t) + hfs_attrblksize(alist)); /* 4 bytes for length */
257
258 if (!vap) {
259 maxattrblocksize = fixedblocksize;
260 if (alist->commonattr & ATTR_CMN_NAME)
261 maxattrblocksize += kHFSPlusMaxFileNameBytes + 1;
262
263 attrbufptr = hfs_malloc(maxattrblocksize);
264 attrptr = attrbufptr;
265 varptr = (char *)attrbufptr + fixedblocksize; /* Point to variable-length storage */
266 } else {
267 if ((alist->commonattr & ATTR_CMN_NAME) && !vap->va_name) {
268 namebuf = hfs_malloc(MAXPATHLEN);
269 if (!namebuf) {
270 error = ENOMEM;
271 goto exit2;
272 }
273 vap->va_name = namebuf;
274 }
275 }
276 /* Get a detached directory hint (cnode must be locked exclusive) */
277 dirhint = hfs_getdirhint(dcp, ((index - 1) & HFS_INDEX_MASK) | tag, TRUE);
278
279 /* Hide tag from catalog layer. */
280 dirhint->dh_index &= HFS_INDEX_MASK;
281 if (dirhint->dh_index == HFS_INDEX_MASK) {
282 dirhint->dh_index = -1;
283 }
284
285 /*
286 * Obtain a list of catalog entries and pack their attributes until
287 * the output buffer is full or maxcount entries have been packed.
288 */
289
290 /*
291 * Constrain our list size.
292 */
293 maxentries = uio_resid(uio) / (fixedblocksize + HFS_AVERAGE_NAME_SIZE);
294 /* There is maxcount for the bulk vnop */
295 if (!vap)
296 maxentries = min(maxentries, maxcount);
297 maxentries = min(maxentries, MAXCATENTRIES);
298 if (maxentries < 1) {
299 error = EINVAL;
300 goto exit2;
301 }
302
303 /* Initialize a catalog entry list. */
304 ce_list = hfs_mallocz(CE_LIST_SIZE(maxentries));
305 ce_list->maxentries = maxentries;
306
307 /*
308 * Populate the ce_list from the catalog file.
309 */
310 lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_SHARED_LOCK);
311
312 error = cat_getentriesattr(hfsmp, dirhint, ce_list, &reachedeof);
313 /* Don't forget to release the descriptors later! */
314
315 hfs_systemfile_unlock(hfsmp, lockflags);
316
317 if ((error == ENOENT) || (reachedeof != 0)) {
318 *(eofflag) = TRUE;
319 error = 0;
320 }
321 if (error) {
322 goto exit1;
323 }
324
325 dcp->c_touch_acctime = TRUE;
326
327 /*
328 * Check for a FS corruption in the valence. We're holding the cnode lock
329 * exclusive since we need to serialize the directory hints, so if we found
330 * that the valence reported 0, but we actually found some items here, then
331 * silently minimally self-heal and bump the valence to 1.
332 */
333 if ((dcp->c_entries == 0) && (ce_list->realentries > 0)) {
334 dcp->c_entries++;
335 dcp->c_flag |= C_MODIFIED;
336 printf("%s : repairing valence to non-zero!\n", __FUNCTION__);
337 /* force an update on dcp while we're still holding the lock. */
338 hfs_update(dvp, 0);
339 }
340
341 /*
342 * Drop the directory lock so we don't deadlock when we:
343 * - acquire a child cnode lock
344 * - make calls to vnode_authorize()
345 * - make calls to kauth_cred_ismember_gid()
346 */
347 hfs_unlock(dcp);
348 dcp = NULL;
349
350 /* Process the catalog entries. */
351 for (i = 0; i < (int)ce_list->realentries; ++i) {
352 struct cnode *cp = NULL;
353 struct vnode *vp = NULL;
354 struct cat_desc * cdescp;
355 struct cat_attr * cattrp;
356 struct cat_fork c_datafork;
357 struct cat_fork c_rsrcfork;
358
359 bzero(&c_datafork, sizeof(c_datafork));
360 bzero(&c_rsrcfork, sizeof(c_rsrcfork));
361 cdescp = &ce_list->entry[i].ce_desc;
362 cattrp = &ce_list->entry[i].ce_attr;
363 c_datafork.cf_size = ce_list->entry[i].ce_datasize;
364 c_datafork.cf_blocks = ce_list->entry[i].ce_datablks;
365 c_rsrcfork.cf_size = ce_list->entry[i].ce_rsrcsize;
366 c_rsrcfork.cf_blocks = ce_list->entry[i].ce_rsrcblks;
367
368 if (((alist->commonattr & ATTR_CMN_USERACCESS) &&
369 (cattrp->ca_recflags & kHFSHasSecurityMask))
370 #if CONFIG_PROTECT
371 ||
372 ((alist->commonattr & ATTR_CMN_DATA_PROTECT_FLAGS) && (vap))
373 #endif
374 ) {
375 /*
376 * Obtain vnode for our vnode_authorize() calls.
377 */
378 if (hfs_vget(hfsmp, cattrp->ca_fileid, &vp, 0, 0) != 0) {
379 vp = NULL;
380 }
381 } else if (vap || !(options & FSOPT_NOINMEMUPDATE)) {
382 /* Get in-memory cnode data (if any). */
383 vp = hfs_chash_getvnode(hfsmp, cattrp->ca_fileid, 0, 0, 0);
384 }
385 if (vp != NULL) {
386 cp = VTOC(vp);
387 /* Only use cnode's decriptor for non-hardlinks */
388 if (!(cp->c_flag & C_HARDLINK))
389 cdescp = &cp->c_desc;
390 cattrp = &cp->c_attr;
391 if (cp->c_datafork) {
392 c_datafork.cf_size = cp->c_datafork->ff_size;
393 c_datafork.cf_blocks = cp->c_datafork->ff_blocks;
394 }
395 if (cp->c_rsrcfork) {
396 c_rsrcfork.cf_size = cp->c_rsrcfork->ff_size;
397 c_rsrcfork.cf_blocks = cp->c_rsrcfork->ff_blocks;
398 }
399 /* All done with cnode. */
400 hfs_unlock(cp);
401 cp = NULL;
402 }
403
404 if (!vap) {
405 *((u_int32_t *)attrptr) = 0;
406 attrptr = ((u_int32_t *)attrptr) + 1;
407 attrblk.ab_attrlist = alist;
408 attrblk.ab_attrbufpp = &attrptr;
409 attrblk.ab_varbufpp = &varptr;
410 attrblk.ab_flags = 0;
411 attrblk.ab_blocksize = maxattrblocksize;
412 attrblk.ab_context = ctx;
413
414 /* Pack catalog entries into attribute buffer. */
415 hfs_packattrblk(&attrblk, hfsmp, vp, cdescp, cattrp, &c_datafork, &c_rsrcfork, ctx);
416 currattrbufsize = ((char *)varptr - (char *)attrbufptr);
417
418 /* All done with vnode. */
419 if (vp != NULL) {
420 vnode_put(vp);
421 vp = NULL;
422 }
423
424 /* Make sure there's enough buffer space remaining. */
425 // LP64todo - fix this!
426 if (uio_resid(uio) < 0 ||
427 currattrbufsize > (u_int32_t)uio_resid(uio)) {
428 break;
429 } else {
430 *((u_int32_t *)attrbufptr) = currattrbufsize;
431 error = uiomove((caddr_t)attrbufptr, currattrbufsize, uio);
432 if (error != E_NONE) {
433 break;
434 }
435 attrptr = attrbufptr;
436 /* Point to variable-length storage */
437 varptr = (char *)attrbufptr + fixedblocksize;
438 /* Save the last valid catalog entry */
439 lastdescp = &ce_list->entry[i].ce_desc;
440 index++;
441 *actualcount += 1;
442
443 /* Termination checks */
444 if ((--maxcount <= 0) ||
445 // LP64todo - fix this!
446 uio_resid(uio) < 0 ||
447 ((u_int32_t)uio_resid(uio) < (fixedblocksize + HFS_AVERAGE_NAME_SIZE))){
448 break;
449 }
450 }
451 } else {
452 size_t orig_resid = (size_t)uio_resid(uio);
453 size_t resid;
454
455 get_vattr_data_for_attrs(alist, vap, hfsmp, vp, cdescp,
456 cattrp, &c_datafork, &c_rsrcfork, ctx);
457
458 #if CONFIG_PROTECT
459 if ((alist->commonattr & ATTR_CMN_DATA_PROTECT_FLAGS) &&
460 vp) {
461 cp_key_class_t class;
462
463 if (!cp_vnode_getclass(vp, &class)) {
464 VATTR_RETURN(vap, va_dataprotect_class,
465 (uint32_t)class);
466 }
467 }
468 #endif
469 error = vfs_attr_pack(vp, uio, alist, options, vap,
470 NULL, ctx);
471
472 /* All done with vnode. */
473 if (vp) {
474 vnode_put(vp);
475 vp = NULL;
476 }
477
478 resid = uio_resid(uio);
479
480 /* Was this entry succesful ? */
481 if (error || resid == orig_resid)
482 break;
483
484 /* Save the last valid catalog entry */
485 lastdescp = &ce_list->entry[i].ce_desc;
486 index++;
487 *actualcount += 1;
488
489 /* Do we have the bare minimum for the next entry ? */
490 if (resid < sizeof(uint32_t))
491 break;
492 }
493 } /* for each catalog entry */
494
495 /*
496 * If we couldn't fit all the entries requested in the user's buffer,
497 * it's not EOF.
498 */
499 if (*eofflag && (*actualcount < (int)ce_list->realentries))
500 *eofflag = 0;
501
502 /* If we skipped catalog entries for reserved files that should
503 * not be listed in namespace, update the index accordingly.
504 */
505 if (ce_list->skipentries) {
506 index += ce_list->skipentries;
507 ce_list->skipentries = 0;
508 }
509
510 /*
511 * If there are more entries then save the last name.
512 * Key this behavior based on whether or not we observed EOFFLAG.
513 *
514 * Do not use the valence as a way to determine if we hit EOF, since
515 * it can be wrong. Use the catalog's output only.
516 */
517 if ((*(eofflag) == 0) && (lastdescp != NULL) && (lastdescp->cd_nameptr != NULL)) {
518
519 /* Remember last entry */
520 if ((dirhint->dh_desc.cd_flags & CD_HASBUF) &&
521 (dirhint->dh_desc.cd_nameptr != NULL)) {
522 dirhint->dh_desc.cd_flags &= ~CD_HASBUF;
523 vfs_removename((const char *)dirhint->dh_desc.cd_nameptr);
524 }
525 dirhint->dh_desc.cd_namelen = lastdescp->cd_namelen;
526 dirhint->dh_desc.cd_nameptr = (const u_int8_t *)
527 vfs_addname((const char *)lastdescp->cd_nameptr, lastdescp->cd_namelen, 0, 0);
528 dirhint->dh_desc.cd_flags |= CD_HASBUF;
529 dirhint->dh_index = index - 1;
530 dirhint->dh_desc.cd_cnid = lastdescp->cd_cnid;
531 dirhint->dh_desc.cd_hint = lastdescp->cd_hint;
532 dirhint->dh_desc.cd_encoding = lastdescp->cd_encoding;
533 }
534
535 /* All done with the catalog descriptors. */
536 for (i = 0; i < (int)ce_list->realentries; ++i)
537 cat_releasedesc(&ce_list->entry[i].ce_desc);
538 ce_list->realentries = 0;
539
540 (void) hfs_lock(VTOC(dvp), HFS_EXCLUSIVE_LOCK, HFS_LOCK_ALLOW_NOEXISTS);
541 dcp = VTOC(dvp);
542
543 exit1:
544 /* Pack directory index and tag into uio_offset. */
545 while (tag == 0) tag = (++dcp->c_dirhinttag) << HFS_INDEX_BITS;
546 uio_setoffset(uio, index | tag);
547 dirhint->dh_index |= tag;
548
549 exit2:
550 if (newstate)
551 *newstate = dirchg;
552
553 /*
554 * Drop directory hint on error or if there are no more entries,
555 * only if EOF was seen.
556 */
557 if (dirhint) {
558 if ((error != 0) || *(eofflag))
559 hfs_reldirhint(dcp, dirhint);
560 else
561 hfs_insertdirhint(dcp, dirhint);
562 }
563 if (namebuf) {
564 hfs_free(namebuf, MAXPATHLEN);
565 vap->va_name = NULL;
566 }
567 if (attrbufptr)
568 hfs_free(attrbufptr, maxattrblocksize);
569 if (ce_list)
570 hfs_free(ce_list, CE_LIST_SIZE(maxentries));
571
572 if (vap && *actualcount && error)
573 error = 0;
574
575 hfs_unlock(dcp);
576 return (error);
577 }
578
579
580 /*==================== Attribute list support routines ====================*/
581
582 /*
583 * Pack cnode attributes into an attribute block.
584 */
585 void
586 hfs_packattrblk(struct attrblock *abp,
587 struct hfsmount *hfsmp,
588 struct vnode *vp,
589 struct cat_desc *descp,
590 struct cat_attr *attrp,
591 struct cat_fork *datafork,
592 struct cat_fork *rsrcfork,
593 struct vfs_context *ctx)
594 {
595 struct attrlist *attrlistp = abp->ab_attrlist;
596
597 if (attrlistp->commonattr)
598 packcommonattr(abp, hfsmp, vp, descp, attrp, ctx);
599
600 if (attrlistp->dirattr && S_ISDIR(attrp->ca_mode))
601 packdirattr(abp, hfsmp, vp, descp,attrp);
602
603 if (attrlistp->fileattr && !S_ISDIR(attrp->ca_mode))
604 packfileattr(abp, hfsmp, attrp, datafork, rsrcfork, vp);
605 }
606
607 static char*
608 mountpointname(struct mount *mp)
609 {
610 struct vfsstatfs *vsfs = vfs_statfs(mp);
611
612 size_t namelength = strlen(vsfs->f_mntonname);
613 int foundchars = 0;
614 char *c;
615
616 if (namelength == 0)
617 return (NULL);
618
619 /*
620 * Look backwards through the name string, looking for
621 * the first slash encountered (which must precede the
622 * last part of the pathname).
623 */
624 for (c = vsfs->f_mntonname + namelength - 1;
625 namelength > 0; --c, --namelength) {
626 if (*c != '/') {
627 foundchars = 1;
628 } else if (foundchars) {
629 return (c + 1);
630 }
631 }
632
633 return vsfs->f_mntonname;
634 }
635
636
637 static void
638 packnameattr(
639 struct attrblock *abp,
640 struct vnode *vp,
641 const u_int8_t *name,
642 int namelen)
643 {
644 void *varbufptr;
645 struct attrreference * attr_refptr;
646 char *mpname;
647 size_t mpnamelen;
648 u_int32_t attrlength;
649 u_int8_t empty = 0;
650
651 /* A cnode's name may be incorrect for the root of a mounted
652 * filesystem (it can be mounted on a different directory name
653 * than the name of the volume, such as "blah-1"). So for the
654 * root directory, it's best to return the last element of the
655 location where the volume's mounted:
656 */
657 if ((vp != NULL) && vnode_isvroot(vp) &&
658 (mpname = mountpointname(vnode_mount(vp)))) {
659 mpnamelen = strlen(mpname);
660
661 /* Trim off any trailing slashes: */
662 while ((mpnamelen > 0) && (mpname[mpnamelen-1] == '/'))
663 --mpnamelen;
664
665 /* If there's anything left, use it instead of the volume's name */
666 if (mpnamelen > 0) {
667 name = (u_int8_t *)mpname;
668 namelen = mpnamelen;
669 }
670 }
671 if (name == NULL) {
672 name = &empty;
673 namelen = 0;
674 }
675
676 varbufptr = *abp->ab_varbufpp;
677 attr_refptr = (struct attrreference *)(*abp->ab_attrbufpp);
678
679 attrlength = namelen + 1;
680 attr_refptr->attr_dataoffset = (char *)varbufptr - (char *)attr_refptr;
681 attr_refptr->attr_length = attrlength;
682 (void) strncpy((char *)varbufptr, (const char *) name, attrlength);
683 /*
684 * Advance beyond the space just allocated and
685 * round up to the next 4-byte boundary:
686 */
687 varbufptr = ((char *)varbufptr) + attrlength + ((4 - (attrlength & 3)) & 3);
688 ++attr_refptr;
689
690 *abp->ab_attrbufpp = attr_refptr;
691 *abp->ab_varbufpp = varbufptr;
692 }
693
694 static void
695 packcommonattr(
696 struct attrblock *abp,
697 struct hfsmount *hfsmp,
698 struct vnode *vp,
699 struct cat_desc * cdp,
700 struct cat_attr * cap,
701 struct vfs_context * ctx)
702 {
703 attrgroup_t attr = abp->ab_attrlist->commonattr;
704 struct mount *mp = HFSTOVFS(hfsmp);
705 void *attrbufptr = *abp->ab_attrbufpp;
706 void *varbufptr = *abp->ab_varbufpp;
707 boolean_t is_64_bit = proc_is64bit(vfs_context_proc(ctx));
708 uid_t cuid = 1;
709 int isroot = 0;
710
711 if (attr & (ATTR_CMN_OWNERID | ATTR_CMN_GRPID)) {
712 cuid = kauth_cred_getuid(vfs_context_ucred(ctx));
713 isroot = cuid == 0;
714 }
715
716 if (ATTR_CMN_NAME & attr) {
717 packnameattr(abp, vp, cdp->cd_nameptr, cdp->cd_namelen);
718 attrbufptr = *abp->ab_attrbufpp;
719 varbufptr = *abp->ab_varbufpp;
720 }
721 if (ATTR_CMN_DEVID & attr) {
722 *((dev_t *)attrbufptr) = hfsmp->hfs_raw_dev;
723 attrbufptr = ((dev_t *)attrbufptr) + 1;
724 }
725 if (ATTR_CMN_FSID & attr) {
726 fsid_t fsid;
727
728 fsid.val[0] = hfsmp->hfs_raw_dev;
729 fsid.val[1] = vfs_typenum(mp);
730 *((fsid_t *)attrbufptr) = fsid;
731 attrbufptr = ((fsid_t *)attrbufptr) + 1;
732 }
733 if (ATTR_CMN_OBJTYPE & attr) {
734 *((fsobj_type_t *)attrbufptr) = IFTOVT(cap->ca_mode);
735 attrbufptr = ((fsobj_type_t *)attrbufptr) + 1;
736 }
737 if (ATTR_CMN_OBJTAG & attr) {
738 *((fsobj_tag_t *)attrbufptr) = VT_HFS;
739 attrbufptr = ((fsobj_tag_t *)attrbufptr) + 1;
740 }
741 /*
742 * Exporting file IDs from HFS Plus:
743 *
744 * For "normal" files the c_fileid is the same value as the
745 * c_cnid. But for hard link files, they are different - the
746 * c_cnid belongs to the active directory entry (ie the link)
747 * and the c_fileid is for the actual inode (ie the data file).
748 *
749 * The stat call (getattr) will always return the c_fileid
750 * and Carbon APIs, which are hardlink-ignorant, will always
751 * receive the c_cnid (from getattrlist).
752 */
753 if (ATTR_CMN_OBJID & attr) {
754 ((fsobj_id_t *)attrbufptr)->fid_objno = cdp->cd_cnid;
755 ((fsobj_id_t *)attrbufptr)->fid_generation = 0;
756 attrbufptr = ((fsobj_id_t *)attrbufptr) + 1;
757 }
758 if (ATTR_CMN_OBJPERMANENTID & attr) {
759 ((fsobj_id_t *)attrbufptr)->fid_objno = cdp->cd_cnid;
760 ((fsobj_id_t *)attrbufptr)->fid_generation = 0;
761 attrbufptr = ((fsobj_id_t *)attrbufptr) + 1;
762 }
763 if (ATTR_CMN_PAROBJID & attr) {
764 ((fsobj_id_t *)attrbufptr)->fid_objno = cdp->cd_parentcnid;
765 ((fsobj_id_t *)attrbufptr)->fid_generation = 0;
766 attrbufptr = ((fsobj_id_t *)attrbufptr) + 1;
767 }
768 if (ATTR_CMN_SCRIPT & attr) {
769 *((text_encoding_t *)attrbufptr) = cdp->cd_encoding;
770 attrbufptr = ((text_encoding_t *)attrbufptr) + 1;
771 }
772 if (ATTR_CMN_CRTIME & attr) {
773 if (is_64_bit) {
774 ((struct user64_timespec *)attrbufptr)->tv_sec = cap->ca_itime;
775 ((struct user64_timespec *)attrbufptr)->tv_nsec = 0;
776 attrbufptr = ((struct user64_timespec *)attrbufptr) + 1;
777 }
778 else {
779 ((struct user32_timespec *)attrbufptr)->tv_sec = cap->ca_itime;
780 ((struct user32_timespec *)attrbufptr)->tv_nsec = 0;
781 attrbufptr = ((struct user32_timespec *)attrbufptr) + 1;
782 }
783 }
784 if (ATTR_CMN_MODTIME & attr) {
785 if (is_64_bit) {
786 ((struct user64_timespec *)attrbufptr)->tv_sec = cap->ca_mtime;
787 ((struct user64_timespec *)attrbufptr)->tv_nsec = 0;
788 attrbufptr = ((struct user64_timespec *)attrbufptr) + 1;
789 }
790 else {
791 ((struct user32_timespec *)attrbufptr)->tv_sec = cap->ca_mtime;
792 ((struct user32_timespec *)attrbufptr)->tv_nsec = 0;
793 attrbufptr = ((struct user32_timespec *)attrbufptr) + 1;
794 }
795 }
796 if (ATTR_CMN_CHGTIME & attr) {
797 if (is_64_bit) {
798 ((struct user64_timespec *)attrbufptr)->tv_sec = cap->ca_ctime;
799 ((struct user64_timespec *)attrbufptr)->tv_nsec = 0;
800 attrbufptr = ((struct user64_timespec *)attrbufptr) + 1;
801 }
802 else {
803 ((struct user32_timespec *)attrbufptr)->tv_sec = cap->ca_ctime;
804 ((struct user32_timespec *)attrbufptr)->tv_nsec = 0;
805 attrbufptr = ((struct user32_timespec *)attrbufptr) + 1;
806 }
807 }
808 if (ATTR_CMN_ACCTIME & attr) {
809 if (is_64_bit) {
810 ((struct user64_timespec *)attrbufptr)->tv_sec = cap->ca_atime;
811 ((struct user64_timespec *)attrbufptr)->tv_nsec = 0;
812 attrbufptr = ((struct user64_timespec *)attrbufptr) + 1;
813 }
814 else {
815 ((struct user32_timespec *)attrbufptr)->tv_sec = cap->ca_atime;
816 ((struct user32_timespec *)attrbufptr)->tv_nsec = 0;
817 attrbufptr = ((struct user32_timespec *)attrbufptr) + 1;
818 }
819 }
820 if (ATTR_CMN_BKUPTIME & attr) {
821 if (is_64_bit) {
822 ((struct user64_timespec *)attrbufptr)->tv_sec = cap->ca_btime;
823 ((struct user64_timespec *)attrbufptr)->tv_nsec = 0;
824 attrbufptr = ((struct user64_timespec *)attrbufptr) + 1;
825 }
826 else {
827 ((struct user32_timespec *)attrbufptr)->tv_sec = cap->ca_btime;
828 ((struct user32_timespec *)attrbufptr)->tv_nsec = 0;
829 attrbufptr = ((struct user32_timespec *)attrbufptr) + 1;
830 }
831 }
832 if (ATTR_CMN_FNDRINFO & attr) {
833 u_int8_t *finfo = NULL;
834 bcopy(&cap->ca_finderinfo, attrbufptr, sizeof(u_int8_t) * 32);
835 finfo = (u_int8_t*)attrbufptr;
836
837 /* Don't expose a symlink's private type/creator. */
838 if (S_ISLNK(cap->ca_mode)) {
839 struct FndrFileInfo *fip;
840
841 fip = (struct FndrFileInfo *)attrbufptr;
842 fip->fdType = 0;
843 fip->fdCreator = 0;
844 }
845
846 /* advance 16 bytes into the attrbuf */
847 finfo = finfo + 16;
848
849 /* also don't expose the date_added or write_gen_counter fields */
850 if (S_ISREG(cap->ca_mode) || S_ISLNK(cap->ca_mode)) {
851 struct FndrExtendedFileInfo *extinfo = (struct FndrExtendedFileInfo *)finfo;
852 extinfo->document_id = 0;
853 extinfo->date_added = 0;
854 extinfo->write_gen_counter = 0;
855 }
856 else if (S_ISDIR(cap->ca_mode)) {
857 struct FndrExtendedDirInfo *extinfo = (struct FndrExtendedDirInfo *)finfo;
858 extinfo->document_id = 0;
859 extinfo->date_added = 0;
860 extinfo->write_gen_counter = 0;
861 }
862
863 attrbufptr = (char *)attrbufptr + sizeof(u_int8_t) * 32;
864 }
865 if (ATTR_CMN_OWNERID & attr) {
866 uid_t nuid = cap->ca_uid;
867
868 if (!isroot) {
869 if (((unsigned int)vfs_flags(HFSTOVFS(hfsmp))) & MNT_UNKNOWNPERMISSIONS)
870 nuid = cuid;
871 else if (nuid == UNKNOWNUID)
872 nuid = cuid;
873 }
874
875 *((uid_t *)attrbufptr) = nuid;
876 attrbufptr = ((uid_t *)attrbufptr) + 1;
877 }
878 if (ATTR_CMN_GRPID & attr) {
879 gid_t ngid = cap->ca_gid;
880
881 if (!isroot) {
882 gid_t cgid = kauth_cred_getgid(vfs_context_ucred(ctx));
883 if (((unsigned int)vfs_flags(HFSTOVFS(hfsmp))) & MNT_UNKNOWNPERMISSIONS)
884 ngid = cgid;
885 else if (ngid == UNKNOWNUID)
886 ngid = cgid;
887 }
888
889 *((gid_t *)attrbufptr) = ngid;
890 attrbufptr = ((gid_t *)attrbufptr) + 1;
891 }
892 if (ATTR_CMN_ACCESSMASK & attr) {
893 /*
894 * [2856576] Since we are dynamically changing the owner, also
895 * effectively turn off the set-user-id and set-group-id bits,
896 * just like chmod(2) would when changing ownership. This prevents
897 * a security hole where set-user-id programs run as whoever is
898 * logged on (or root if nobody is logged in yet!)
899 */
900 *((u_int32_t *)attrbufptr) = (cap->ca_uid == UNKNOWNUID) ?
901 cap->ca_mode & ~(S_ISUID | S_ISGID) : cap->ca_mode;
902 attrbufptr = ((u_int32_t *)attrbufptr) + 1;
903 }
904 if (ATTR_CMN_FLAGS & attr) {
905 *((u_int32_t *)attrbufptr) = cap->ca_flags;
906 attrbufptr = ((u_int32_t *)attrbufptr) + 1;
907 }
908 if (ATTR_CMN_USERACCESS & attr) {
909 u_int32_t user_access;
910
911 /* Take the long path when we have an ACL */
912 if ((vp != NULLVP) && (cap->ca_recflags & kHFSHasSecurityMask)) {
913 user_access = hfs_real_user_access(vp, abp->ab_context);
914 } else {
915 user_access = DerivePermissionSummary(cap->ca_uid, cap->ca_gid,
916 cap->ca_mode, mp, vfs_context_ucred(ctx), 0);
917 }
918 /* Also consider READ-ONLY file system. */
919 if (vfs_flags(mp) & MNT_RDONLY) {
920 user_access &= ~W_OK;
921 }
922 /* Locked objects are not writable either */
923 if ((cap->ca_flags & UF_IMMUTABLE) && (vfs_context_suser(abp->ab_context) != 0))
924 user_access &= ~W_OK;
925 if ((cap->ca_flags & SF_IMMUTABLE) && (vfs_context_suser(abp->ab_context) == 0))
926 user_access &= ~W_OK;
927
928 *((u_int32_t *)attrbufptr) = user_access;
929 attrbufptr = ((u_int32_t *)attrbufptr) + 1;
930 }
931 if (ATTR_CMN_FILEID & attr) {
932 *((u_int64_t *)attrbufptr) = cap->ca_fileid;
933 attrbufptr = ((u_int64_t *)attrbufptr) + 1;
934 }
935 if (ATTR_CMN_PARENTID & attr) {
936 *((u_int64_t *)attrbufptr) = cdp->cd_parentcnid;
937 attrbufptr = ((u_int64_t *)attrbufptr) + 1;
938 }
939
940 *abp->ab_attrbufpp = attrbufptr;
941 *abp->ab_varbufpp = varbufptr;
942 }
943
944 static void
945 packdirattr(
946 struct attrblock *abp,
947 struct hfsmount *hfsmp,
948 struct vnode *vp,
949 struct cat_desc * descp,
950 struct cat_attr * cattrp)
951 {
952 attrgroup_t attr = abp->ab_attrlist->dirattr;
953 void *attrbufptr = *abp->ab_attrbufpp;
954 u_int32_t entries;
955
956 /*
957 * The DIR_LINKCOUNT is the count of real directory hard links.
958 * (i.e. its not the sum of the implied "." and ".." references
959 * typically used in stat's st_nlink field)
960 */
961 if (ATTR_DIR_LINKCOUNT & attr) {
962 *((u_int32_t *)attrbufptr) = cattrp->ca_linkcount;
963 attrbufptr = ((u_int32_t *)attrbufptr) + 1;
964 }
965 if (ATTR_DIR_ENTRYCOUNT & attr) {
966 entries = cattrp->ca_entries;
967
968 if (descp->cd_parentcnid == kHFSRootParentID) {
969 if (hfsmp->hfs_private_desc[FILE_HARDLINKS].cd_cnid != 0)
970 --entries; /* hide private dir */
971 if (hfsmp->hfs_private_desc[DIR_HARDLINKS].cd_cnid != 0)
972 --entries; /* hide private dir */
973 if (hfsmp->jnl ||
974 ((hfsmp->vcbAtrb & kHFSVolumeJournaledMask) &&
975 (hfsmp->hfs_flags & HFS_READ_ONLY)))
976 entries -= 2; /* hide the journal files */
977 }
978
979 *((u_int32_t *)attrbufptr) = entries;
980 attrbufptr = ((u_int32_t *)attrbufptr) + 1;
981 }
982 if (ATTR_DIR_MOUNTSTATUS & attr) {
983 if (vp != NULL && vnode_mountedhere(vp) != NULL)
984 *((u_int32_t *)attrbufptr) = DIR_MNTSTATUS_MNTPOINT;
985 else
986 *((u_int32_t *)attrbufptr) = 0;
987 attrbufptr = ((u_int32_t *)attrbufptr) + 1;
988 }
989 *abp->ab_attrbufpp = attrbufptr;
990 }
991
992 static void
993 packfileattr(
994 struct attrblock *abp,
995 struct hfsmount *hfsmp,
996 struct cat_attr *cattrp,
997 struct cat_fork *datafork,
998 struct cat_fork *rsrcfork,
999 struct vnode *vp)
1000 {
1001 #if !HFS_COMPRESSION
1002 #pragma unused(vp)
1003 #endif
1004 attrgroup_t attr = abp->ab_attrlist->fileattr;
1005 void *attrbufptr = *abp->ab_attrbufpp;
1006 void *varbufptr = *abp->ab_varbufpp;
1007 u_int32_t allocblksize;
1008
1009 allocblksize = HFSTOVCB(hfsmp)->blockSize;
1010
1011 off_t datasize = datafork->cf_size;
1012 off_t totalsize = datasize + rsrcfork->cf_size;
1013 #if HFS_COMPRESSION
1014 int handle_compressed;
1015 handle_compressed = (cattrp->ca_flags & UF_COMPRESSED);// && hfs_file_is_compressed(VTOC(vp), 1);
1016
1017 if (handle_compressed) {
1018 if (attr & (ATTR_FILE_DATALENGTH|ATTR_FILE_TOTALSIZE)) {
1019 if ( 0 == hfs_uncompressed_size_of_compressed_file(hfsmp, vp, cattrp->ca_fileid, &datasize, 1) ) { /* 1 == don't take the cnode lock */
1020 /* total size of a compressed file is just the data size */
1021 totalsize = datasize;
1022 }
1023 }
1024 }
1025 #endif
1026
1027 if (ATTR_FILE_LINKCOUNT & attr) {
1028 *((u_int32_t *)attrbufptr) = cattrp->ca_linkcount;
1029 attrbufptr = ((u_int32_t *)attrbufptr) + 1;
1030 }
1031 if (ATTR_FILE_TOTALSIZE & attr) {
1032 *((off_t *)attrbufptr) = totalsize;
1033 attrbufptr = ((off_t *)attrbufptr) + 1;
1034 }
1035 if (ATTR_FILE_ALLOCSIZE & attr) {
1036 *((off_t *)attrbufptr) =
1037 (off_t)cattrp->ca_blocks * (off_t)allocblksize;
1038 attrbufptr = ((off_t *)attrbufptr) + 1;
1039 }
1040 if (ATTR_FILE_IOBLOCKSIZE & attr) {
1041 *((u_int32_t *)attrbufptr) = hfsmp->hfs_logBlockSize;
1042 attrbufptr = ((u_int32_t *)attrbufptr) + 1;
1043 }
1044 if (ATTR_FILE_CLUMPSIZE & attr) {
1045 *((u_int32_t *)attrbufptr) = hfsmp->vcbClpSiz;
1046 attrbufptr = ((u_int32_t *)attrbufptr) + 1;
1047 }
1048 if (ATTR_FILE_DEVTYPE & attr) {
1049 if (S_ISBLK(cattrp->ca_mode) || S_ISCHR(cattrp->ca_mode))
1050 *((u_int32_t *)attrbufptr) = (u_int32_t)cattrp->ca_rdev;
1051 else
1052 *((u_int32_t *)attrbufptr) = 0;
1053 attrbufptr = ((u_int32_t *)attrbufptr) + 1;
1054 }
1055
1056 if (ATTR_FILE_DATALENGTH & attr) {
1057 *((off_t *)attrbufptr) = datasize;
1058 attrbufptr = ((off_t *)attrbufptr) + 1;
1059 }
1060
1061 #if HFS_COMPRESSION
1062 /* fake the data fork size on a decmpfs compressed file to reflect the
1063 * uncompressed size. This ensures proper reading and copying of these files.
1064 * NOTE: we may need to get the vnode here because the vnode parameter
1065 * passed by hfs_vnop_readdirattr() may be null.
1066 */
1067
1068 if ( handle_compressed ) {
1069 if (attr & ATTR_FILE_DATAALLOCSIZE) {
1070 *((off_t *)attrbufptr) = (off_t)rsrcfork->cf_blocks * (off_t)allocblksize;
1071 attrbufptr = ((off_t *)attrbufptr) + 1;
1072 }
1073 if (attr & ATTR_FILE_RSRCLENGTH) {
1074 *((off_t *)attrbufptr) = 0;
1075 attrbufptr = ((off_t *)attrbufptr) + 1;
1076 }
1077 if (attr & ATTR_FILE_RSRCALLOCSIZE) {
1078 *((off_t *)attrbufptr) = 0;
1079 attrbufptr = ((off_t *)attrbufptr) + 1;
1080 }
1081 }
1082 else
1083 #endif
1084 {
1085 if (ATTR_FILE_DATAALLOCSIZE & attr) {
1086 *((off_t *)attrbufptr) = (off_t)datafork->cf_blocks * (off_t)allocblksize;
1087 attrbufptr = ((off_t *)attrbufptr) + 1;
1088 }
1089 if (ATTR_FILE_RSRCLENGTH & attr) {
1090 *((off_t *)attrbufptr) = rsrcfork->cf_size;
1091 attrbufptr = ((off_t *)attrbufptr) + 1;
1092 }
1093 if (ATTR_FILE_RSRCALLOCSIZE & attr) {
1094 *((off_t *)attrbufptr) = (off_t)rsrcfork->cf_blocks * (off_t)allocblksize;
1095 attrbufptr = ((off_t *)attrbufptr) + 1;
1096 }
1097 }
1098 *abp->ab_attrbufpp = attrbufptr;
1099 *abp->ab_varbufpp = varbufptr;
1100 }
1101
1102 /*
1103 * Calculate the total size of an attribute block.
1104 */
1105 int
1106 hfs_attrblksize(struct attrlist *attrlist)
1107 {
1108 int size;
1109 attrgroup_t a;
1110 int sizeof_timespec;
1111 boolean_t is_64_bit = proc_is64bit(current_proc());
1112
1113 if (is_64_bit)
1114 sizeof_timespec = sizeof(struct user64_timespec);
1115 else
1116 sizeof_timespec = sizeof(struct user32_timespec);
1117
1118 hfs_assert((attrlist->commonattr & ~ATTR_CMN_VALIDMASK) == 0);
1119
1120 hfs_assert((attrlist->volattr & ~ATTR_VOL_VALIDMASK) == 0);
1121
1122 hfs_assert((attrlist->dirattr & ~ATTR_DIR_VALIDMASK) == 0);
1123
1124 hfs_assert((attrlist->fileattr & ~ATTR_FILE_VALIDMASK) == 0);
1125
1126 hfs_assert((attrlist->forkattr & ~ATTR_FORK_VALIDMASK) == 0);
1127
1128 size = 0;
1129
1130 if ((a = attrlist->commonattr) != 0) {
1131 if (a & ATTR_CMN_NAME) size += sizeof(struct attrreference);
1132 if (a & ATTR_CMN_DEVID) size += sizeof(dev_t);
1133 if (a & ATTR_CMN_FSID) size += sizeof(fsid_t);
1134 if (a & ATTR_CMN_OBJTYPE) size += sizeof(fsobj_type_t);
1135 if (a & ATTR_CMN_OBJTAG) size += sizeof(fsobj_tag_t);
1136 if (a & ATTR_CMN_OBJID) size += sizeof(fsobj_id_t);
1137 if (a & ATTR_CMN_OBJPERMANENTID) size += sizeof(fsobj_id_t);
1138 if (a & ATTR_CMN_PAROBJID) size += sizeof(fsobj_id_t);
1139 if (a & ATTR_CMN_SCRIPT) size += sizeof(text_encoding_t);
1140 if (a & ATTR_CMN_CRTIME) size += sizeof_timespec;
1141 if (a & ATTR_CMN_MODTIME) size += sizeof_timespec;
1142 if (a & ATTR_CMN_CHGTIME) size += sizeof_timespec;
1143 if (a & ATTR_CMN_ACCTIME) size += sizeof_timespec;
1144 if (a & ATTR_CMN_BKUPTIME) size += sizeof_timespec;
1145 if (a & ATTR_CMN_FNDRINFO) size += 32 * sizeof(u_int8_t);
1146 if (a & ATTR_CMN_OWNERID) size += sizeof(uid_t);
1147 if (a & ATTR_CMN_GRPID) size += sizeof(gid_t);
1148 if (a & ATTR_CMN_ACCESSMASK) size += sizeof(u_int32_t);
1149 if (a & ATTR_CMN_FLAGS) size += sizeof(u_int32_t);
1150 if (a & ATTR_CMN_USERACCESS) size += sizeof(u_int32_t);
1151 if (a & ATTR_CMN_FILEID) size += sizeof(u_int64_t);
1152 if (a & ATTR_CMN_PARENTID) size += sizeof(u_int64_t);
1153 }
1154 if ((a = attrlist->dirattr) != 0) {
1155 if (a & ATTR_DIR_LINKCOUNT) size += sizeof(u_int32_t);
1156 if (a & ATTR_DIR_ENTRYCOUNT) size += sizeof(u_int32_t);
1157 if (a & ATTR_DIR_MOUNTSTATUS) size += sizeof(u_int32_t);
1158 }
1159 if ((a = attrlist->fileattr) != 0) {
1160 if (a & ATTR_FILE_LINKCOUNT) size += sizeof(u_int32_t);
1161 if (a & ATTR_FILE_TOTALSIZE) size += sizeof(off_t);
1162 if (a & ATTR_FILE_ALLOCSIZE) size += sizeof(off_t);
1163 if (a & ATTR_FILE_IOBLOCKSIZE) size += sizeof(u_int32_t);
1164 if (a & ATTR_FILE_CLUMPSIZE) size += sizeof(u_int32_t);
1165 if (a & ATTR_FILE_DEVTYPE) size += sizeof(u_int32_t);
1166 if (a & ATTR_FILE_DATALENGTH) size += sizeof(off_t);
1167 if (a & ATTR_FILE_DATAALLOCSIZE) size += sizeof(off_t);
1168 if (a & ATTR_FILE_RSRCLENGTH) size += sizeof(off_t);
1169 if (a & ATTR_FILE_RSRCALLOCSIZE) size += sizeof(off_t);
1170 }
1171
1172 return (size);
1173 }
1174
1175 #define KAUTH_DIR_WRITE_RIGHTS (KAUTH_VNODE_ACCESS | KAUTH_VNODE_ADD_FILE | \
1176 KAUTH_VNODE_ADD_SUBDIRECTORY | \
1177 KAUTH_VNODE_DELETE_CHILD)
1178
1179 #define KAUTH_DIR_READ_RIGHTS (KAUTH_VNODE_ACCESS | KAUTH_VNODE_LIST_DIRECTORY)
1180
1181 #define KAUTH_DIR_EXECUTE_RIGHTS (KAUTH_VNODE_ACCESS | KAUTH_VNODE_SEARCH)
1182
1183 #define KAUTH_FILE_WRITE_RIGHTS (KAUTH_VNODE_ACCESS | KAUTH_VNODE_WRITE_DATA)
1184
1185 #define KAUTH_FILE_READRIGHTS (KAUTH_VNODE_ACCESS | KAUTH_VNODE_READ_DATA)
1186
1187 #define KAUTH_FILE_EXECUTE_RIGHTS (KAUTH_VNODE_ACCESS | KAUTH_VNODE_EXECUTE)
1188
1189
1190 /*
1191 * Compute the same [expensive] user_access value as getattrlist does
1192 */
1193 static u_int32_t
1194 hfs_real_user_access(vnode_t vp, vfs_context_t ctx)
1195 {
1196 u_int32_t user_access = 0;
1197
1198 if (vnode_isdir(vp)) {
1199 if (vnode_authorize(vp, NULLVP, KAUTH_DIR_WRITE_RIGHTS, ctx) == 0)
1200 user_access |= W_OK;
1201 if (vnode_authorize(vp, NULLVP, KAUTH_DIR_READ_RIGHTS, ctx) == 0)
1202 user_access |= R_OK;
1203 if (vnode_authorize(vp, NULLVP, KAUTH_DIR_EXECUTE_RIGHTS, ctx) == 0)
1204 user_access |= X_OK;
1205 } else {
1206 if (vnode_authorize(vp, NULLVP, KAUTH_FILE_WRITE_RIGHTS, ctx) == 0)
1207 user_access |= W_OK;
1208 if (vnode_authorize(vp, NULLVP, KAUTH_FILE_READRIGHTS, ctx) == 0)
1209 user_access |= R_OK;
1210 if (vnode_authorize(vp, NULLVP, KAUTH_FILE_EXECUTE_RIGHTS, ctx) == 0)
1211 user_access |= X_OK;
1212 }
1213 return (user_access);
1214 }
1215
1216
1217 u_int32_t
1218 DerivePermissionSummary(uid_t obj_uid, gid_t obj_gid, mode_t obj_mode,
1219 struct mount *mp, kauth_cred_t cred, __unused struct proc *p)
1220 {
1221 u_int32_t permissions;
1222
1223 if (obj_uid == UNKNOWNUID)
1224 obj_uid = kauth_cred_getuid(cred);
1225
1226 /* User id 0 (root) always gets access. */
1227 if (!suser(cred, NULL)) {
1228 permissions = R_OK | W_OK | X_OK;
1229 goto Exit;
1230 };
1231
1232 /* Otherwise, check the owner. */
1233 if (hfs_owner_rights(VFSTOHFS(mp), obj_uid, cred, NULL, false) == 0) {
1234 permissions = ((u_int32_t)obj_mode & S_IRWXU) >> 6;
1235 goto Exit;
1236 }
1237
1238 /* Otherwise, check the groups. */
1239 if (! (((unsigned int)vfs_flags(mp)) & MNT_UNKNOWNPERMISSIONS)) {
1240 int is_member;
1241
1242 if (kauth_cred_ismember_gid(cred, obj_gid, &is_member) == 0 && is_member) {
1243 permissions = ((u_int32_t)obj_mode & S_IRWXG) >> 3;
1244 goto Exit;
1245 }
1246 }
1247
1248 /* Otherwise, settle for 'others' access. */
1249 permissions = (u_int32_t)obj_mode & S_IRWXO;
1250
1251 Exit:
1252 return (permissions);
1253 }
1254
1255
1256 /*
1257 * ===========================================================================
1258 * Support functions for filling up a vnode_attr structure based on attributes
1259 * requested.
1260 * ===========================================================================
1261 */
1262 void
1263 get_vattr_data_for_attrs(struct attrlist *alp, struct vnode_attr *vap,
1264 struct hfsmount *hfsmp, struct vnode *vp, struct cat_desc *descp,
1265 struct cat_attr *atrp, struct cat_fork *datafork, struct cat_fork *rsrcfork,
1266 vfs_context_t ctx)
1267 {
1268 if (alp->commonattr)
1269 vattr_data_for_common_attrs(alp, vap, hfsmp, vp, descp, atrp,
1270 ctx);
1271
1272 if (alp->dirattr && S_ISDIR(atrp->ca_mode))
1273 vattr_data_for_dir_attrs(alp, vap, hfsmp, vp, descp, atrp);
1274
1275 if (alp->fileattr && !S_ISDIR(atrp->ca_mode)) {
1276 vattr_data_for_file_attrs(alp, vap, hfsmp, atrp, datafork,
1277 rsrcfork, vp);
1278 }
1279 }
1280
1281 static void
1282 copy_name_attr(struct vnode_attr *vap, struct vnode *vp, const u_int8_t *name,
1283 int namelen)
1284 {
1285 char *mpname;
1286 size_t mpnamelen;
1287 u_int32_t attrlength;
1288 u_int8_t empty = 0;
1289
1290 /* A cnode's name may be incorrect for the root of a mounted
1291 * filesystem (it can be mounted on a different directory name
1292 * than the name of the volume, such as "blah-1"). So for the
1293 * root directory, it's best to return the last element of the
1294 location where the volume's mounted:
1295 */
1296 if ((vp != NULL) && vnode_isvroot(vp) &&
1297 (mpname = mountpointname(vnode_mount(vp)))) {
1298 mpnamelen = strlen(mpname);
1299
1300 /* Trim off any trailing slashes: */
1301 while ((mpnamelen > 0) && (mpname[mpnamelen-1] == '/'))
1302 --mpnamelen;
1303
1304 /* If there's anything left, use it instead of the volume's name */
1305 if (mpnamelen > 0) {
1306 name = (u_int8_t *)mpname;
1307 namelen = mpnamelen;
1308 }
1309 }
1310
1311 if (name == NULL) {
1312 name = &empty;
1313 namelen = 0;
1314 }
1315
1316 attrlength = namelen + 1;
1317 (void) strncpy((char *)vap->va_name, (const char *) name, attrlength);
1318 /*
1319 * round upto 8 and zero out the rounded up bytes.
1320 */
1321 attrlength = min(kHFSPlusMaxFileNameBytes, ((attrlength + 7) & ~0x07));
1322 bzero(vap->va_name + attrlength, kHFSPlusMaxFileNameBytes - attrlength);
1323 }
1324
1325 static void
1326 vattr_data_for_common_attrs( struct attrlist *alp, struct vnode_attr *vap,
1327 struct hfsmount *hfsmp, struct vnode *vp, struct cat_desc *cdp,
1328 struct cat_attr *cap, vfs_context_t ctx)
1329 {
1330 attrgroup_t attr = alp->commonattr;
1331 struct mount *mp = HFSTOVFS(hfsmp);
1332 uid_t cuid = 1;
1333 int isroot = 0;
1334
1335 if (attr & (ATTR_CMN_OWNERID | ATTR_CMN_GRPID)) {
1336 cuid = kauth_cred_getuid(vfs_context_ucred(ctx));
1337 isroot = cuid == 0;
1338 }
1339
1340 if (ATTR_CMN_NAME & attr) {
1341 if (vap->va_name) {
1342 copy_name_attr(vap, vp, cdp->cd_nameptr,
1343 cdp->cd_namelen);
1344 VATTR_SET_SUPPORTED(vap, va_name);
1345 } else {
1346 VATTR_CLEAR_SUPPORTED(vap, va_name);
1347 }
1348 }
1349
1350 if (ATTR_CMN_DEVID & attr) {
1351 vap->va_devid = hfsmp->hfs_raw_dev;
1352 VATTR_SET_SUPPORTED(vap, va_devid);
1353 }
1354
1355 if (ATTR_CMN_FSID & attr) {
1356 vap->va_fsid64.val[0] = hfsmp->hfs_raw_dev;
1357 vap->va_fsid64.val[1] = vfs_typenum(mp);
1358 VATTR_SET_SUPPORTED(vap, va_fsid64);
1359 }
1360 /*
1361 * We always provide the objtype even if not asked because VFS helper
1362 * functions depend on knowing the object's type.
1363 */
1364 vap->va_objtype = IFTOVT(cap->ca_mode);
1365 VATTR_SET_SUPPORTED(vap, va_objtype);
1366
1367 if (ATTR_CMN_OBJTAG & attr) {
1368 vap->va_objtag = VT_HFS;
1369 VATTR_SET_SUPPORTED(vap, va_objtag);
1370 }
1371 /*
1372 * Exporting file IDs from HFS Plus:
1373 *
1374 * For "normal" files the c_fileid is the same value as the
1375 * c_cnid. But for hard link files, they are different - the
1376 * c_cnid belongs to the active directory entry (ie the link)
1377 * and the c_fileid is for the actual inode (ie the data file).
1378 *
1379 * The stat call (getattr) will always return the c_fileid
1380 * and Carbon APIs, which are hardlink-ignorant, will always
1381 * receive the c_cnid (from getattrlist).
1382 */
1383 if ((ATTR_CMN_OBJID & attr) ||
1384 (ATTR_CMN_OBJPERMANENTID & attr)) {
1385 vap->va_linkid = cdp->cd_cnid;
1386 VATTR_SET_SUPPORTED(vap, va_linkid);
1387 }
1388
1389 if (ATTR_CMN_PAROBJID & attr) {
1390 vap->va_parentid = cdp->cd_parentcnid;
1391 VATTR_SET_SUPPORTED(vap, va_parentid);
1392 }
1393
1394 if (ATTR_CMN_SCRIPT & attr) {
1395 vap->va_encoding = cdp->cd_encoding;
1396 VATTR_SET_SUPPORTED(vap, va_encoding);
1397 }
1398
1399 if (ATTR_CMN_CRTIME & attr) {
1400 vap->va_create_time.tv_sec = cap->ca_itime;
1401 vap->va_create_time.tv_nsec = 0;
1402 VATTR_SET_SUPPORTED(vap, va_create_time);
1403 }
1404
1405 if (ATTR_CMN_MODTIME & attr) {
1406 vap->va_modify_time.tv_sec = cap->ca_mtime;
1407 vap->va_modify_time.tv_nsec = 0;
1408 VATTR_SET_SUPPORTED(vap, va_modify_time);
1409 }
1410
1411 if (ATTR_CMN_CHGTIME & attr) {
1412 vap->va_change_time.tv_sec = cap->ca_ctime;
1413 vap->va_change_time.tv_nsec = 0;
1414 VATTR_SET_SUPPORTED(vap, va_change_time);
1415 }
1416
1417 if (ATTR_CMN_ACCTIME & attr) {
1418 vap->va_access_time.tv_sec = cap->ca_atime;
1419 vap->va_access_time.tv_nsec = 0;
1420 VATTR_SET_SUPPORTED(vap, va_access_time);
1421 }
1422
1423 if (ATTR_CMN_BKUPTIME & attr) {
1424 vap->va_backup_time.tv_sec = cap->ca_btime;
1425 vap->va_backup_time.tv_nsec = 0;
1426 VATTR_SET_SUPPORTED(vap, va_backup_time);
1427 }
1428
1429 if (ATTR_CMN_FNDRINFO & attr) {
1430 u_int8_t *finfo = NULL;
1431
1432 bcopy(&cap->ca_finderinfo, &vap->va_finderinfo[0],
1433 sizeof(u_int8_t) * 32);
1434 finfo = (u_int8_t*)(&vap->va_finderinfo[0]);
1435
1436 /* Don't expose a symlink's private type/creator. */
1437 if (S_ISLNK(cap->ca_mode)) {
1438 struct FndrFileInfo *fip;
1439
1440 fip = (struct FndrFileInfo *)finfo;
1441 fip->fdType = 0;
1442 fip->fdCreator = 0;
1443 }
1444
1445 /* advance 16 bytes into the attrbuf */
1446 finfo = finfo + 16;
1447
1448 /* also don't expose the date_added or write_gen_counter fields */
1449 if (S_ISREG(cap->ca_mode) || S_ISLNK(cap->ca_mode)) {
1450 struct FndrExtendedFileInfo *extinfo =
1451 (struct FndrExtendedFileInfo *)finfo;
1452 extinfo->document_id = 0;
1453 extinfo->date_added = 0;
1454 extinfo->write_gen_counter = 0;
1455 } else if (S_ISDIR(cap->ca_mode)) {
1456 struct FndrExtendedDirInfo *extinfo =
1457 (struct FndrExtendedDirInfo *)finfo;
1458 extinfo->document_id = 0;
1459 extinfo->date_added = 0;
1460 extinfo->write_gen_counter = 0;
1461 }
1462
1463 VATTR_SET_SUPPORTED(vap, va_finderinfo);
1464 }
1465
1466 if (ATTR_CMN_OWNERID & attr) {
1467 uid_t nuid = cap->ca_uid;
1468
1469 if (!isroot) {
1470 if (((unsigned int)vfs_flags(HFSTOVFS(hfsmp))) & MNT_UNKNOWNPERMISSIONS)
1471 nuid = cuid;
1472 else if (nuid == UNKNOWNUID)
1473 nuid = cuid;
1474 }
1475
1476 vap->va_uid = nuid;
1477 VATTR_SET_SUPPORTED(vap, va_uid);
1478 }
1479
1480 if (ATTR_CMN_GRPID & attr) {
1481 gid_t ngid = cap->ca_gid;
1482
1483 if (!isroot) {
1484 gid_t cgid = kauth_cred_getgid(vfs_context_ucred(ctx));
1485 if (((unsigned int)vfs_flags(HFSTOVFS(hfsmp))) & MNT_UNKNOWNPERMISSIONS)
1486 ngid = cgid;
1487 else if (ngid == UNKNOWNUID)
1488 ngid = cgid;
1489 }
1490
1491 vap->va_gid = ngid;
1492 VATTR_SET_SUPPORTED(vap, va_gid);
1493 }
1494
1495 if (ATTR_CMN_ACCESSMASK & attr) {
1496 uint32_t nmode;
1497 /*
1498 * [2856576] Since we are dynamically changing the owner, also
1499 * effectively turn off the set-user-id and set-group-id bits,
1500 * just like chmod(2) would when changing ownership. This prevents
1501 * a security hole where set-user-id programs run as whoever is
1502 * logged on (or root if nobody is logged in yet!)
1503 */
1504 nmode = (cap->ca_uid == UNKNOWNUID) ?
1505 cap->ca_mode & ~(S_ISUID | S_ISGID) : cap->ca_mode;
1506
1507 vap->va_mode = nmode;
1508 VATTR_SET_SUPPORTED(vap, va_mode);
1509 }
1510
1511 if (ATTR_CMN_FLAGS & attr) {
1512 vap->va_flags = cap->ca_flags;
1513 VATTR_SET_SUPPORTED(vap, va_flags);
1514 }
1515
1516 if (ATTR_CMN_GEN_COUNT & attr) {
1517 vap->va_write_gencount = hfs_get_gencount_from_blob(
1518 (const uint8_t *)cap->ca_finderinfo, cap->ca_mode);
1519 VATTR_SET_SUPPORTED(vap, va_write_gencount);
1520 }
1521
1522 if (ATTR_CMN_DOCUMENT_ID & attr) {
1523 vap->va_document_id = hfs_get_document_id_from_blob(
1524 (const uint8_t *)cap->ca_finderinfo, cap->ca_mode);
1525 VATTR_SET_SUPPORTED(vap, va_document_id);
1526 }
1527
1528 if (ATTR_CMN_USERACCESS & attr) {
1529 u_int32_t user_access;
1530
1531 /* Take the long path when we have an ACL */
1532 if ((vp != NULLVP) && (cap->ca_recflags & kHFSHasSecurityMask)) {
1533 user_access = hfs_real_user_access(vp, ctx);
1534 } else {
1535 user_access = DerivePermissionSummary(cap->ca_uid, cap->ca_gid,
1536 cap->ca_mode, mp, vfs_context_ucred(ctx), 0);
1537 }
1538 /* Also consider READ-ONLY file system. */
1539 if (vfs_flags(mp) & MNT_RDONLY) {
1540 user_access &= ~W_OK;
1541 }
1542 /* Locked objects are not writable either */
1543 if ((cap->ca_flags & UF_IMMUTABLE) && (vfs_context_suser(ctx) != 0))
1544 user_access &= ~W_OK;
1545 if ((cap->ca_flags & SF_IMMUTABLE) && (vfs_context_suser(ctx) == 0))
1546 user_access &= ~W_OK;
1547
1548 vap->va_user_access = user_access;
1549 VATTR_SET_SUPPORTED(vap, va_user_access);
1550 }
1551
1552 /*
1553 * Right now the best we can do is tell if we *don't* have extended
1554 * security (like hfs_vnop_getattr).
1555 */
1556 if (ATTR_CMN_EXTENDED_SECURITY & attr) {
1557 if (!(cap->ca_recflags & kHFSHasSecurityMask)) {
1558 vap->va_acl = (kauth_acl_t) KAUTH_FILESEC_NONE;
1559 VATTR_SET_SUPPORTED(vap, va_acl);
1560 }
1561 }
1562
1563 if (ATTR_CMN_FILEID & attr) {
1564 vap->va_fileid = cap->ca_fileid;
1565 VATTR_SET_SUPPORTED(vap, va_fileid);
1566 }
1567
1568 if (ATTR_CMN_PARENTID & attr) {
1569 vap->va_parentid = cdp->cd_parentcnid;
1570 VATTR_SET_SUPPORTED(vap, va_parentid);
1571 }
1572
1573 if (ATTR_CMN_ADDEDTIME & attr) {
1574 if (cap->ca_recflags & kHFSHasDateAddedMask) {
1575 vap->va_addedtime.tv_sec = hfs_get_dateadded_from_blob(
1576 (const uint8_t *)cap->ca_finderinfo, cap->ca_mode);
1577 vap->va_addedtime.tv_nsec = 0;
1578 VATTR_SET_SUPPORTED(vap, va_addedtime);
1579 }
1580 }
1581 }
1582
1583 static void
1584 vattr_data_for_dir_attrs(struct attrlist *alp, struct vnode_attr *vap,
1585 struct hfsmount *hfsmp, struct vnode *vp, struct cat_desc * descp,
1586 struct cat_attr * cattrp)
1587 {
1588 attrgroup_t attr = alp->dirattr;
1589 u_int32_t entries;
1590
1591 /*
1592 * The DIR_LINKCOUNT is the count of real directory hard links.
1593 * (i.e. its not the sum of the implied "." and ".." references
1594 * typically used in stat's st_nlink field)
1595 */
1596 if (ATTR_DIR_LINKCOUNT & attr) {
1597 vap->va_dirlinkcount = cattrp->ca_linkcount;
1598 VATTR_SET_SUPPORTED(vap, va_dirlinkcount);
1599 }
1600 if (ATTR_DIR_ENTRYCOUNT & attr) {
1601 entries = cattrp->ca_entries;
1602
1603 if (descp->cd_parentcnid == kHFSRootParentID) {
1604 if (hfsmp->hfs_private_desc[FILE_HARDLINKS].cd_cnid != 0)
1605 --entries; /* hide private dir */
1606 if (hfsmp->hfs_private_desc[DIR_HARDLINKS].cd_cnid != 0)
1607 --entries; /* hide private dir */
1608 if (hfsmp->jnl ||
1609 ((hfsmp->vcbAtrb & kHFSVolumeJournaledMask) &&
1610 (hfsmp->hfs_flags & HFS_READ_ONLY)))
1611 entries -= 2; /* hide the journal files */
1612 }
1613
1614 vap->va_nchildren = entries;
1615 VATTR_SET_SUPPORTED(vap, va_nchildren);
1616 }
1617
1618 if (ATTR_DIR_MOUNTSTATUS & attr) {
1619 /*
1620 * There is not vnode_attr for mount point status.
1621 * XXX. Should there be ?
1622 */
1623 u_int32_t mstatus = 0;
1624
1625 if (vp != NULL && vnode_mountedhere(vp) != NULL)
1626 mstatus = DIR_MNTSTATUS_MNTPOINT;
1627 }
1628 }
1629
1630 static void
1631 vattr_data_for_file_attrs(struct attrlist *alp, struct vnode_attr *vap,
1632 struct hfsmount *hfsmp, struct cat_attr *cattrp, struct cat_fork *datafork,
1633 struct cat_fork *rsrcfork, struct vnode *vp)
1634 {
1635 #if !HFS_COMPRESSION
1636 #pragma unused(vp)
1637 #endif
1638 attrgroup_t attr = alp->fileattr;
1639 off_t da_size, rsrc_len, rsrc_alloc;
1640 u_int32_t allocblksize;
1641
1642 allocblksize = HFSTOVCB(hfsmp)->blockSize;
1643
1644 off_t datasize = datafork->cf_size;
1645 off_t totalsize = datasize + rsrcfork->cf_size;
1646 #if HFS_COMPRESSION
1647 int handle_compressed;
1648 handle_compressed = (cattrp->ca_flags & UF_COMPRESSED);// && hfs_file_is_compressed(VTOC(vp), 1);
1649
1650 if (handle_compressed) {
1651 if (attr & (ATTR_FILE_DATALENGTH|ATTR_FILE_TOTALSIZE)) {
1652 if ( 0 == hfs_uncompressed_size_of_compressed_file(hfsmp, vp, cattrp->ca_fileid, &datasize, 1) ) { /* 1 == don't take the cnode lock */
1653 /* total size of a compressed file is just the data size */
1654 totalsize = datasize;
1655 }
1656 }
1657 }
1658 #endif
1659
1660 if (ATTR_FILE_LINKCOUNT & attr) {
1661 vap->va_nlink = cattrp->ca_linkcount;
1662 VATTR_SET_SUPPORTED(vap, va_nlink);
1663 }
1664 if (ATTR_FILE_TOTALSIZE & attr) {
1665 VATTR_RETURN(vap, va_total_size, totalsize);
1666 }
1667 if (ATTR_FILE_ALLOCSIZE & attr) {
1668 VATTR_RETURN(vap, va_total_alloc,
1669 (off_t)cattrp->ca_blocks * (off_t)allocblksize );
1670 }
1671 if (ATTR_FILE_IOBLOCKSIZE & attr) {
1672 VATTR_RETURN(vap, va_iosize, hfsmp->hfs_logBlockSize);
1673 }
1674
1675 /* ATTR_FILE_CLUMPSIZE is obsolete */
1676
1677 if (ATTR_FILE_DEVTYPE & attr) {
1678 dev_t dev = 0;
1679
1680 if (S_ISBLK(cattrp->ca_mode) || S_ISCHR(cattrp->ca_mode))
1681 dev = (u_int32_t)cattrp->ca_rdev;
1682
1683 VATTR_RETURN(vap, va_rdev, dev);
1684 }
1685
1686 if (ATTR_FILE_DATALENGTH & attr) {
1687 VATTR_RETURN(vap, va_data_size, datasize);
1688 }
1689 #if HFS_COMPRESSION
1690 /* fake the data fork size on a decmpfs compressed file to reflect the
1691 * uncompressed size. This ensures proper reading and copying of these
1692 * files.
1693 * NOTE: we may need to get the vnode here because the vnode parameter
1694 * passed by hfs_vnop_readdirattr() may be null.
1695 */
1696
1697 if (handle_compressed) {
1698 da_size = (off_t)rsrcfork->cf_blocks * (off_t)allocblksize;
1699 rsrc_len = 0;
1700 rsrc_alloc = 0;
1701 }
1702 else
1703 #endif
1704 {
1705 da_size = (off_t)datafork->cf_blocks * (off_t)allocblksize;
1706 rsrc_len = rsrcfork->cf_size;
1707 rsrc_alloc = (off_t)rsrcfork->cf_blocks * (off_t)allocblksize;
1708 }
1709
1710 if (ATTR_FILE_DATAALLOCSIZE & attr) {
1711 VATTR_RETURN(vap, va_data_alloc, da_size);
1712 }
1713
1714 if (ATTR_FILE_RSRCLENGTH & attr) {
1715 VATTR_RETURN(vap, va_rsrc_length, rsrc_len);
1716 }
1717
1718 if (ATTR_FILE_RSRCALLOCSIZE & attr) {
1719 VATTR_RETURN(vap, va_rsrc_alloc, rsrc_alloc);
1720 }
1721 }
mirror of hfs