1 /* $NetBSD: ntfs_vfsops.c,v 1.111 2024/02/04 00:16:59 christos Exp $ */
2
3 /*-
4 * Copyright (c) 1998, 1999 Semen Ustimenko
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 AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * Id: ntfs_vfsops.c,v 1.7 1999/05/31 11:28:30 phk Exp
29 */
30
31 #include <sys/cdefs.h>
32 __KERNEL_RCSID(0, "$NetBSD: ntfs_vfsops.c,v 1.111 2024/02/04 00:16:59 christos Exp $");
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/namei.h>
37 #include <sys/proc.h>
38 #include <sys/kernel.h>
39 #include <sys/vnode.h>
40 #include <sys/mount.h>
41 #include <sys/buf.h>
42 #include <sys/fcntl.h>
43 #include <sys/malloc.h>
44 #include <sys/sysctl.h>
45 #include <sys/device.h>
46 #include <sys/conf.h>
47 #include <sys/kauth.h>
48 #include <sys/module.h>
49
50 #include <uvm/uvm_extern.h>
51
52 #include <miscfs/genfs/genfs.h>
53 #include <miscfs/specfs/specdev.h>
54
55 #include <fs/ntfs/ntfs.h>
56 #include <fs/ntfs/ntfs_inode.h>
57 #include <fs/ntfs/ntfs_subr.h>
58 #include <fs/ntfs/ntfs_vfsops.h>
59 #include <fs/ntfs/ntfs_ihash.h>
60 #include <fs/ntfs/ntfsmount.h>
61
62 MODULE(MODULE_CLASS_VFS, ntfs, NULL);
63
64 MALLOC_JUSTDEFINE(M_NTFSMNT, "NTFS mount", "NTFS mount structure");
65 MALLOC_JUSTDEFINE(M_NTFSNTNODE,"NTFS ntnode", "NTFS ntnode information");
66 MALLOC_JUSTDEFINE(M_NTFSDIR,"NTFS dir", "NTFS dir buffer");
67
68 static int ntfs_superblock_validate(struct ntfsmount *);
69 static int ntfs_mount(struct mount *, const char *, void *, size_t *);
70 static int ntfs_root(struct mount *, int, struct vnode **);
71 static int ntfs_start(struct mount *, int);
72 static int ntfs_statvfs(struct mount *, struct statvfs *);
73 static int ntfs_sync(struct mount *, int, kauth_cred_t);
74 static int ntfs_unmount(struct mount *, int);
75 static int ntfs_vget(struct mount *mp, ino_t ino, int,
76 struct vnode **vpp);
77 static int ntfs_loadvnode(struct mount *, struct vnode *,
78 const void *, size_t, const void **);
79 static int ntfs_mountfs(struct vnode *, struct mount *,
80 struct ntfs_args *, struct lwp *);
81 static int ntfs_vptofh(struct vnode *, struct fid *, size_t *);
82
83 static void ntfs_init(void);
84 static void ntfs_reinit(void);
85 static void ntfs_done(void);
86 static int ntfs_fhtovp(struct mount *, struct fid *, int,
87 struct vnode **);
88 static int ntfs_mountroot(void);
89
90 static const struct genfs_ops ntfs_genfsops = {
91 .gop_write = genfs_compat_gop_write,
92 };
93
94 static struct sysctllog *ntfs_sysctl_log;
95
96 static int
ntfs_mountroot(void)97 ntfs_mountroot(void)
98 {
99 struct mount *mp;
100 struct lwp *l = curlwp; /* XXX */
101 int error;
102 struct ntfs_args args;
103
104 if (device_class(root_device) != DV_DISK)
105 return (ENODEV);
106
107 if ((error = vfs_rootmountalloc(MOUNT_NTFS, "root_device", &mp))) {
108 vrele(rootvp);
109 return (error);
110 }
111
112 args.flag = 0;
113 args.uid = 0;
114 args.gid = 0;
115 args.mode = S_IRWXU|S_IRWXG|S_IRWXO;
116
117 if ((error = ntfs_mountfs(rootvp, mp, &args, l)) != 0) {
118 vfs_unbusy(mp);
119 vfs_rele(mp);
120 return (error);
121 }
122
123 mountlist_append(mp);
124 (void)ntfs_statvfs(mp, &mp->mnt_stat);
125 vfs_unbusy(mp);
126 return (0);
127 }
128
129 static void
ntfs_init(void)130 ntfs_init(void)
131 {
132
133 malloc_type_attach(M_NTFSMNT);
134 malloc_type_attach(M_NTFSNTNODE);
135 malloc_type_attach(M_NTFSDIR);
136 malloc_type_attach(M_NTFSNTVATTR);
137 malloc_type_attach(M_NTFSRDATA);
138 malloc_type_attach(M_NTFSDECOMP);
139 malloc_type_attach(M_NTFSRUN);
140 ntfs_nthashinit();
141 ntfs_toupper_init();
142 }
143
144 static void
ntfs_reinit(void)145 ntfs_reinit(void)
146 {
147 ntfs_nthashreinit();
148 }
149
150 static void
ntfs_done(void)151 ntfs_done(void)
152 {
153 ntfs_nthashdone();
154 malloc_type_detach(M_NTFSMNT);
155 malloc_type_detach(M_NTFSNTNODE);
156 malloc_type_detach(M_NTFSDIR);
157 malloc_type_detach(M_NTFSNTVATTR);
158 malloc_type_detach(M_NTFSRDATA);
159 malloc_type_detach(M_NTFSDECOMP);
160 malloc_type_detach(M_NTFSRUN);
161 }
162
163 static int
ntfs_mount(struct mount * mp,const char * path,void * data,size_t * data_len)164 ntfs_mount(struct mount *mp, const char *path, void *data, size_t *data_len)
165 {
166 struct lwp *l = curlwp;
167 int err = 0, flags;
168 struct vnode *devvp;
169 struct ntfs_args *args = data;
170
171 if (args == NULL)
172 return EINVAL;
173 if (*data_len < sizeof *args)
174 return EINVAL;
175
176 if (mp->mnt_flag & MNT_GETARGS) {
177 struct ntfsmount *ntmp = VFSTONTFS(mp);
178 if (ntmp == NULL)
179 return EIO;
180 args->fspec = NULL;
181 args->uid = ntmp->ntm_uid;
182 args->gid = ntmp->ntm_gid;
183 args->mode = ntmp->ntm_mode;
184 args->flag = ntmp->ntm_flag;
185 *data_len = sizeof *args;
186 return 0;
187 }
188 /*
189 ***
190 * Mounting non-root file system or updating a file system
191 ***
192 */
193
194 /*
195 * If updating, check whether changing from read-only to
196 * read/write; if there is no device name, that's all we do.
197 */
198 if (mp->mnt_flag & MNT_UPDATE) {
199 printf("ntfs_mount(): MNT_UPDATE not supported\n");
200 return (EINVAL);
201 }
202
203 /*
204 * Not an update, or updating the name: look up the name
205 * and verify that it refers to a sensible block device.
206 */
207 err = namei_simple_user(args->fspec,
208 NSM_FOLLOW_NOEMULROOT, &devvp);
209 if (err)
210 return (err);
211
212 if (devvp->v_type != VBLK) {
213 err = ENOTBLK;
214 goto fail;
215 }
216 if (bdevsw_lookup(devvp->v_rdev) == NULL) {
217 err = ENXIO;
218 goto fail;
219 }
220 if (mp->mnt_flag & MNT_UPDATE) {
221 #if 0
222 /*
223 ********************
224 * UPDATE
225 ********************
226 */
227
228 if (devvp != ntmp->um_devvp) {
229 err = EINVAL; /* needs translation */
230 goto fail;
231 }
232
233 /*
234 * Update device name only on success
235 */
236 err = set_statvfs_info(NULL, UIO_USERSPACE, args->fspec,
237 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, p);
238 if (err)
239 goto fail;
240
241 vrele(devvp);
242 #endif
243 } else {
244 /*
245 ********************
246 * NEW MOUNT
247 ********************
248 */
249
250 /*
251 * Since this is a new mount, we want the names for
252 * the device and the mount point copied in. If an
253 * error occurs, the mountpoint is discarded by the
254 * upper level code.
255 */
256
257 /* Save "last mounted on" info for mount point (NULL pad)*/
258 err = set_statvfs_info(path, UIO_USERSPACE, args->fspec,
259 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l);
260 if (err)
261 goto fail;
262
263 if (mp->mnt_flag & MNT_RDONLY)
264 flags = FREAD;
265 else
266 flags = FREAD|FWRITE;
267 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
268 err = VOP_OPEN(devvp, flags, FSCRED);
269 VOP_UNLOCK(devvp);
270 if (err)
271 goto fail;
272 err = ntfs_mountfs(devvp, mp, args, l);
273 if (err) {
274 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
275 (void)VOP_CLOSE(devvp, flags, NOCRED);
276 VOP_UNLOCK(devvp);
277 goto fail;
278 }
279 }
280
281 /*
282 * Initialize FS stat information in mount struct; uses both
283 * mp->mnt_stat.f_mntonname and mp->mnt_stat.f_mntfromname
284 *
285 * This code is common to root and non-root mounts
286 */
287 (void)VFS_STATVFS(mp, &mp->mnt_stat);
288 return (err);
289
290 fail:
291 vrele(devvp);
292 return (err);
293 }
294
295 static int
ntfs_superblock_validate(struct ntfsmount * ntmp)296 ntfs_superblock_validate(struct ntfsmount *ntmp)
297 {
298 /* Sanity checks. XXX: More checks are probably needed. */
299 if (strncmp(ntmp->ntm_bootfile.bf_sysid, NTFS_BBID, NTFS_BBIDLEN)) {
300 dprintf(("ntfs_superblock_validate: invalid boot block\n"));
301 return EINVAL;
302 }
303 if (ntmp->ntm_bps == 0) {
304 dprintf(("ntfs_superblock_validate: invalid bytes per sector\n"));
305 return EINVAL;
306 }
307 if (ntmp->ntm_spc == 0) {
308 dprintf(("ntfs_superblock_validate: invalid sectors per cluster\n"));
309 return EINVAL;
310 }
311 return 0;
312 }
313
314 /*
315 * Common code for mount and mountroot
316 */
317 int
ntfs_mountfs(struct vnode * devvp,struct mount * mp,struct ntfs_args * argsp,struct lwp * l)318 ntfs_mountfs(struct vnode *devvp, struct mount *mp, struct ntfs_args *argsp, struct lwp *l)
319 {
320 struct buf *bp;
321 struct ntfsmount *ntmp;
322 dev_t dev = devvp->v_rdev;
323 int error, i;
324 struct vnode *vp;
325 struct vnode_iterator *marker;
326
327 ntmp = NULL;
328
329 /*
330 * Flush out any old buffers remaining from a previous use.
331 */
332 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
333 error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0);
334 VOP_UNLOCK(devvp);
335 if (error)
336 return (error);
337
338 bp = NULL;
339
340 error = bread(devvp, BBLOCK, BBSIZE, 0, &bp);
341 if (error)
342 goto out;
343 ntmp = malloc(sizeof(*ntmp), M_NTFSMNT, M_WAITOK|M_ZERO);
344 memcpy(&ntmp->ntm_bootfile, bp->b_data, sizeof(struct bootfile));
345 brelse(bp, 0);
346 bp = NULL;
347
348 if ((error = ntfs_superblock_validate(ntmp)))
349 goto out;
350
351 {
352 int8_t cpr = ntmp->ntm_mftrecsz;
353 if (cpr > 0)
354 ntmp->ntm_bpmftrec = ntmp->ntm_spc * cpr;
355 else
356 ntmp->ntm_bpmftrec = (1 << (-cpr)) / ntmp->ntm_bps;
357 }
358 dprintf(("ntfs_mountfs(): bps: %d, spc: %d, media: %x, mftrecsz: %d (%d sects)\n",
359 ntmp->ntm_bps, ntmp->ntm_spc, ntmp->ntm_bootfile.bf_media,
360 ntmp->ntm_mftrecsz, ntmp->ntm_bpmftrec));
361 dprintf(("ntfs_mountfs(): mftcn: 0x%x|0x%x\n",
362 (u_int32_t)ntmp->ntm_mftcn, (u_int32_t)ntmp->ntm_mftmirrcn));
363
364 ntmp->ntm_mountp = mp;
365 ntmp->ntm_dev = dev;
366 ntmp->ntm_devvp = devvp;
367 ntmp->ntm_uid = argsp->uid;
368 ntmp->ntm_gid = argsp->gid;
369 ntmp->ntm_mode = argsp->mode & (S_IRWXU|S_IRWXG|S_IRWXO);
370 ntmp->ntm_flag = argsp->flag;
371 mp->mnt_data = ntmp;
372
373 /* set file name encode/decode hooks XXX utf-8 only for now */
374 ntmp->ntm_wget = ntfs_utf8_wget;
375 ntmp->ntm_wput = ntfs_utf8_wput;
376 ntmp->ntm_wcmp = ntfs_utf8_wcmp;
377
378 dprintf(("ntfs_mountfs(): case-%s,%s uid: %d, gid: %d, mode: %o\n",
379 (ntmp->ntm_flag & NTFS_MFLAG_CASEINS)?"insens.":"sens.",
380 (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)?" allnames,":"",
381 ntmp->ntm_uid, ntmp->ntm_gid, ntmp->ntm_mode));
382
383 /*
384 * We read in some system nodes to do not allow
385 * reclaim them and to have everytime access to them.
386 */
387 {
388 int pi[3] = { NTFS_MFTINO, NTFS_ROOTINO, NTFS_BITMAPINO };
389 for (i = 0; i < 3; i++) {
390 error = VFS_VGET(mp, pi[i], LK_EXCLUSIVE,
391 &(ntmp->ntm_sysvn[pi[i]]));
392 if (error)
393 goto out1;
394 ntmp->ntm_sysvn[pi[i]]->v_vflag |= VV_SYSTEM;
395 vref(ntmp->ntm_sysvn[pi[i]]);
396 vput(ntmp->ntm_sysvn[pi[i]]);
397 }
398 }
399
400 /* read the Unicode lowercase --> uppercase translation table,
401 * if necessary */
402 if ((error = ntfs_toupper_use(mp, ntmp)))
403 goto out1;
404
405 /*
406 * Scan $BitMap and count free clusters
407 */
408 error = ntfs_calccfree(ntmp, &ntmp->ntm_cfree);
409 if (error)
410 goto out1;
411
412 /*
413 * Read and translate to internal format attribute
414 * definition file.
415 */
416 {
417 int num,j;
418 struct attrdef ad;
419
420 /* Open $AttrDef */
421 error = VFS_VGET(mp, NTFS_ATTRDEFINO, LK_EXCLUSIVE, &vp);
422 if (error)
423 goto out1;
424
425 /* Count valid entries */
426 for (num = 0; ; num++) {
427 error = ntfs_readattr(ntmp, VTONT(vp),
428 NTFS_A_DATA, NULL,
429 num * sizeof(ad), sizeof(ad),
430 &ad, NULL);
431 if (error)
432 goto out1;
433 if (ad.ad_name[0] == 0)
434 break;
435 }
436
437 /* Alloc memory for attribute definitions */
438 ntmp->ntm_ad = (struct ntvattrdef *) malloc(
439 num * sizeof(struct ntvattrdef),
440 M_NTFSMNT, M_WAITOK);
441
442 ntmp->ntm_adnum = num;
443
444 /* Read them and translate */
445 for (i = 0; i < num; i++) {
446 error = ntfs_readattr(ntmp, VTONT(vp),
447 NTFS_A_DATA, NULL,
448 i * sizeof(ad), sizeof(ad),
449 &ad, NULL);
450 if (error)
451 goto out1;
452 j = 0;
453 do {
454 ntmp->ntm_ad[i].ad_name[j] = ad.ad_name[j];
455 } while(ad.ad_name[j++]);
456 ntmp->ntm_ad[i].ad_namelen = j - 1;
457 ntmp->ntm_ad[i].ad_type = ad.ad_type;
458 }
459
460 vput(vp);
461 }
462
463 mp->mnt_stat.f_fsidx.__fsid_val[0] = dev;
464 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_NTFS);
465 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0];
466 mp->mnt_stat.f_namemax = NTFS_MAXFILENAME;
467 mp->mnt_flag |= MNT_LOCAL;
468 spec_node_setmountedfs(devvp, mp);
469 return (0);
470
471 out1:
472 for (i = 0; i < NTFS_SYSNODESNUM; i++)
473 if (ntmp->ntm_sysvn[i])
474 vrele(ntmp->ntm_sysvn[i]);
475
476 vfs_vnode_iterator_init(mp, &marker);
477 while ((vp = vfs_vnode_iterator_next(marker, NULL, NULL))) {
478 if (vrecycle(vp))
479 continue;
480 panic("%s: cannot recycle vnode %p", __func__, vp);
481 }
482 vfs_vnode_iterator_destroy(marker);
483 out:
484 spec_node_setmountedfs(devvp, NULL);
485 if (bp)
486 brelse(bp, 0);
487
488 if (error) {
489 if (ntmp) {
490 if (ntmp->ntm_ad)
491 free(ntmp->ntm_ad, M_NTFSMNT);
492 free(ntmp, M_NTFSMNT);
493 }
494 }
495
496 return (error);
497 }
498
499 static int
ntfs_start(struct mount * mp,int flags)500 ntfs_start(struct mount *mp, int flags)
501 {
502 return (0);
503 }
504
505 static int
ntfs_unmount(struct mount * mp,int mntflags)506 ntfs_unmount(struct mount *mp, int mntflags)
507 {
508 struct lwp *l = curlwp;
509 struct ntfsmount *ntmp;
510 int error, ronly = 0, flags, i;
511
512 dprintf(("ntfs_unmount: unmounting...\n"));
513 ntmp = VFSTONTFS(mp);
514
515 flags = 0;
516 if (mntflags & MNT_FORCE)
517 flags |= FORCECLOSE;
518
519 dprintf(("ntfs_unmount: vflushing...\n"));
520 error = vflush(mp, NULLVP, flags | SKIPSYSTEM);
521 if (error) {
522 dprintf(("ntfs_unmount: vflush failed: %d\n",error));
523 return (error);
524 }
525
526 /* Check if only system vnodes are rest */
527 for (i = 0; i < NTFS_SYSNODESNUM; i++)
528 if ((ntmp->ntm_sysvn[i]) &&
529 (vrefcnt(ntmp->ntm_sysvn[i]) > 1))
530 return (EBUSY);
531
532 /* Dereference all system vnodes */
533 for (i = 0; i < NTFS_SYSNODESNUM; i++)
534 if (ntmp->ntm_sysvn[i])
535 vrele(ntmp->ntm_sysvn[i]);
536
537 /* vflush system vnodes */
538 error = vflush(mp, NULLVP, flags);
539 if (error) {
540 panic("ntfs_unmount: vflush failed(sysnodes): %d\n",error);
541 }
542
543 /* Check if the type of device node isn't VBAD before
544 * touching v_specinfo. If the device vnode is revoked, the
545 * field is NULL and touching it causes null pointer derefercence.
546 */
547 if (ntmp->ntm_devvp->v_type != VBAD)
548 spec_node_setmountedfs(ntmp->ntm_devvp, NULL);
549
550 error = vinvalbuf(ntmp->ntm_devvp, V_SAVE, NOCRED, l, 0, 0);
551 KASSERT(error == 0);
552
553 /* lock the device vnode before calling VOP_CLOSE() */
554 vn_lock(ntmp->ntm_devvp, LK_EXCLUSIVE | LK_RETRY);
555 error = VOP_CLOSE(ntmp->ntm_devvp, ronly ? FREAD : FREAD|FWRITE,
556 NOCRED);
557 KASSERT(error == 0);
558 VOP_UNLOCK(ntmp->ntm_devvp);
559
560 vrele(ntmp->ntm_devvp);
561
562 /* free the toupper table, if this has been last mounted ntfs volume */
563 ntfs_toupper_unuse();
564
565 dprintf(("ntfs_umount: freeing memory...\n"));
566 mp->mnt_data = NULL;
567 mp->mnt_flag &= ~MNT_LOCAL;
568 free(ntmp->ntm_ad, M_NTFSMNT);
569 free(ntmp, M_NTFSMNT);
570 return (0);
571 }
572
573 static int
ntfs_root(struct mount * mp,int lktype,struct vnode ** vpp)574 ntfs_root(struct mount *mp, int lktype, struct vnode **vpp)
575 {
576 struct vnode *nvp;
577 int error = 0;
578
579 dprintf(("ntfs_root(): sysvn: %p\n",
580 VFSTONTFS(mp)->ntm_sysvn[NTFS_ROOTINO]));
581 error = VFS_VGET(mp, (ino_t)NTFS_ROOTINO, lktype, &nvp);
582 if (error) {
583 printf("ntfs_root: VFS_VGET failed: %d\n", error);
584 return (error);
585 }
586
587 *vpp = nvp;
588 return (0);
589 }
590
591 int
ntfs_calccfree(struct ntfsmount * ntmp,cn_t * cfreep)592 ntfs_calccfree(struct ntfsmount *ntmp, cn_t *cfreep)
593 {
594 struct vnode *vp;
595 u_int8_t *tmp;
596 int j, error;
597 cn_t cfree = 0;
598 size_t bmsize, i;
599
600 vp = ntmp->ntm_sysvn[NTFS_BITMAPINO];
601 bmsize = VTOF(vp)->f_size;
602 tmp = (u_int8_t *) malloc(bmsize, M_TEMP, M_WAITOK);
603
604 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
605 0, bmsize, tmp, NULL);
606 if (error)
607 goto out;
608
609 for (i = 0; i < bmsize; i++)
610 for (j = 0; j < 8; j++)
611 if (~tmp[i] & (1 << j))
612 cfree++;
613 *cfreep = cfree;
614
615 out:
616 free(tmp, M_TEMP);
617 return(error);
618 }
619
620 static int
ntfs_statvfs(struct mount * mp,struct statvfs * sbp)621 ntfs_statvfs(struct mount *mp, struct statvfs *sbp)
622 {
623 struct ntfsmount *ntmp = VFSTONTFS(mp);
624 u_int64_t mftallocated;
625
626 dprintf(("ntfs_statvfs():\n"));
627
628 mftallocated = VTOF(ntmp->ntm_sysvn[NTFS_MFTINO])->f_allocated;
629
630 sbp->f_bsize = ntmp->ntm_bps;
631 sbp->f_frsize = sbp->f_bsize; /* XXX */
632 sbp->f_iosize = ntmp->ntm_bps * ntmp->ntm_spc;
633 sbp->f_blocks = ntmp->ntm_bootfile.bf_spv;
634 sbp->f_bfree = sbp->f_bavail = ntfs_cntobn(ntmp->ntm_cfree);
635 sbp->f_ffree = sbp->f_favail = sbp->f_bfree / ntmp->ntm_bpmftrec;
636 sbp->f_files = mftallocated / ntfs_bntob(ntmp->ntm_bpmftrec) +
637 sbp->f_ffree;
638 sbp->f_fresvd = sbp->f_bresvd = 0; /* XXX */
639 sbp->f_flag = mp->mnt_flag;
640 copy_statvfs_info(sbp, mp);
641 return (0);
642 }
643
644 static int
ntfs_sync(struct mount * mp,int waitfor,kauth_cred_t cred)645 ntfs_sync(struct mount *mp, int waitfor, kauth_cred_t cred)
646 {
647 /*dprintf(("ntfs_sync():\n"));*/
648 return (0);
649 }
650
651 /*ARGSUSED*/
652 static int
ntfs_fhtovp(struct mount * mp,struct fid * fhp,int lktype,struct vnode ** vpp)653 ntfs_fhtovp(struct mount *mp, struct fid *fhp, int lktype, struct vnode **vpp)
654 {
655 struct ntfid ntfh;
656 int error;
657
658 if (fhp->fid_len != sizeof(struct ntfid))
659 return EINVAL;
660 memcpy(&ntfh, fhp, sizeof(ntfh));
661 ddprintf(("ntfs_fhtovp(): %s: %llu\n", mp->mnt_stat.f_mntonname,
662 (unsigned long long)ntfh.ntfid_ino));
663
664 error = ntfs_vgetex(mp, ntfh.ntfid_ino, ntfh.ntfid_attr, "",
665 lktype, vpp);
666 if (error != 0) {
667 *vpp = NULLVP;
668 return (error);
669 }
670
671 /* XXX as unlink/rmdir/mkdir/creat are not currently possible
672 * with NTFS, we don't need to check anything else for now */
673 return (0);
674 }
675
676 static int
ntfs_vptofh(struct vnode * vp,struct fid * fhp,size_t * fh_size)677 ntfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size)
678 {
679 struct ntnode *ntp;
680 struct ntfid ntfh;
681 struct fnode *fn;
682
683 if (*fh_size < sizeof(struct ntfid)) {
684 *fh_size = sizeof(struct ntfid);
685 return E2BIG;
686 }
687 *fh_size = sizeof(struct ntfid);
688
689 ddprintf(("ntfs_fhtovp(): %s: %p\n", vp->v_mount->mnt_stat.f_mntonname,
690 vp));
691
692 fn = VTOF(vp);
693 ntp = VTONT(vp);
694 memset(&ntfh, 0, sizeof(ntfh));
695 ntfh.ntfid_len = sizeof(struct ntfid);
696 ntfh.ntfid_ino = ntp->i_number;
697 ntfh.ntfid_attr = fn->f_attrtype;
698 #ifdef notyet
699 ntfh.ntfid_gen = ntp->i_gen;
700 #endif
701 memcpy(fhp, &ntfh, sizeof(ntfh));
702 return (0);
703 }
704
705 static int
ntfs_loadvnode(struct mount * mp,struct vnode * vp,const void * key,size_t key_len,const void ** new_key)706 ntfs_loadvnode(struct mount *mp, struct vnode *vp,
707 const void *key, size_t key_len, const void **new_key)
708 {
709 int error;
710 struct ntvattr *vap;
711 struct ntkey small_key, *ntkey;
712 struct ntfsmount *ntmp;
713 struct ntnode *ip;
714 struct fnode *fp = NULL;
715 enum vtype f_type = VBAD;
716
717 if (key_len <= sizeof(small_key))
718 ntkey = &small_key;
719 else
720 ntkey = kmem_alloc(key_len, KM_SLEEP);
721 memcpy(ntkey, key, key_len);
722
723 dprintf(("ntfs_loadvnode: ino: %llu, attr: 0x%x:%s",
724 (unsigned long long)ntkey->k_ino,
725 ntkey->k_attrtype, ntkey->k_attrname));
726
727 ntmp = VFSTONTFS(mp);
728
729 /* Get ntnode */
730 error = ntfs_ntlookup(ntmp, ntkey->k_ino, &ip);
731 if (error) {
732 printf("ntfs_loadvnode: ntfs_ntget failed\n");
733 goto out;
734 }
735 /* It may be not initialized fully, so force load it */
736 if (!(ip->i_flag & IN_LOADED)) {
737 error = ntfs_loadntnode(ntmp, ip);
738 if (error) {
739 printf("ntfs_loadvnode: CAN'T LOAD ATTRIBUTES FOR INO:"
740 " %llu\n", (unsigned long long)ip->i_number);
741 ntfs_ntput(ip);
742 goto out;
743 }
744 }
745
746 /* Setup fnode */
747 fp = kmem_zalloc(sizeof(*fp), KM_SLEEP);
748 dprintf(("%s: allocating fnode: %p\n", __func__, fp));
749
750 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap);
751 if (error) {
752 printf("%s: attr %x for ino %" PRId64 ": error %d\n",
753 __func__, NTFS_A_NAME, ip->i_number, error);
754 ntfs_ntput(ip);
755 goto out;
756 }
757 fp->f_fflag = vap->va_a_name->n_flag;
758 fp->f_pnumber = vap->va_a_name->n_pnumber;
759 fp->f_times = vap->va_a_name->n_times;
760 ntfs_ntvattrrele(vap);
761
762 if ((ip->i_frflag & NTFS_FRFLAG_DIR) &&
763 (ntkey->k_attrtype == NTFS_A_DATA &&
764 strcmp(ntkey->k_attrname, "") == 0)) {
765 f_type = VDIR;
766 } else {
767 f_type = VREG;
768 error = ntfs_ntvattrget(ntmp, ip,
769 ntkey->k_attrtype, ntkey->k_attrname, 0, &vap);
770 if (error == 0) {
771 fp->f_size = vap->va_datalen;
772 fp->f_allocated = vap->va_allocated;
773 ntfs_ntvattrrele(vap);
774 } else if (ntkey->k_attrtype == NTFS_A_DATA &&
775 strcmp(ntkey->k_attrname, "") == 0 &&
776 error == ENOENT) {
777 fp->f_size = 0;
778 fp->f_allocated = 0;
779 error = 0;
780 } else {
781 printf("%s: attr %x for ino %" PRId64 ": error %d\n",
782 __func__, ntkey->k_attrtype, ip->i_number, error);
783 ntfs_ntput(ip);
784 goto out;
785 }
786 }
787
788 if (key_len <= sizeof(fp->f_smallkey))
789 fp->f_key = &fp->f_smallkey;
790 else
791 fp->f_key = kmem_alloc(key_len, KM_SLEEP);
792 fp->f_ip = ip;
793 fp->f_ino = ip->i_number;
794 strcpy(fp->f_attrname, ntkey->k_attrname);
795 fp->f_attrtype = ntkey->k_attrtype;
796 fp->f_vp = vp;
797 vp->v_data = fp;
798
799 vp->v_tag = VT_NTFS;
800 vp->v_type = f_type;
801 vp->v_op = ntfs_vnodeop_p;
802 ntfs_ntref(ip);
803 vref(ip->i_devvp);
804 genfs_node_init(vp, &ntfs_genfsops);
805
806 if (ip->i_number == NTFS_ROOTINO)
807 vp->v_vflag |= VV_ROOT;
808
809 uvm_vnp_setsize(vp, fp->f_size);
810 ntfs_ntput(ip);
811
812 *new_key = fp->f_key;
813
814 fp = NULL;
815
816 out:
817 if (ntkey != &small_key)
818 kmem_free(ntkey, key_len);
819 if (fp)
820 kmem_free(fp, sizeof(*fp));
821
822 return error;
823 }
824
825 static int
ntfs_vget(struct mount * mp,ino_t ino,int lktype,struct vnode ** vpp)826 ntfs_vget(struct mount *mp, ino_t ino, int lktype, struct vnode **vpp)
827 {
828 return ntfs_vgetex(mp, ino, NTFS_A_DATA, "", lktype, vpp);
829 }
830
831 int
ntfs_vgetex(struct mount * mp,ino_t ino,u_int32_t attrtype,const char * attrname,u_long lkflags,struct vnode ** vpp)832 ntfs_vgetex(struct mount *mp, ino_t ino, u_int32_t attrtype,
833 const char *attrname, u_long lkflags, struct vnode **vpp)
834 {
835 const int attrlen = strlen(attrname);
836 int error;
837 struct ntkey small_key, *ntkey;
838
839 if (NTKEY_SIZE(attrlen) <= sizeof(small_key))
840 ntkey = &small_key;
841 else
842 ntkey = malloc(NTKEY_SIZE(attrlen), M_TEMP, M_WAITOK);
843 ntkey->k_ino = ino;
844 ntkey->k_attrtype = attrtype;
845 strcpy(ntkey->k_attrname, attrname);
846
847 error = vcache_get(mp, ntkey, NTKEY_SIZE(attrlen), vpp);
848 if (error)
849 goto out;
850
851 if ((lkflags & (LK_SHARED | LK_EXCLUSIVE)) != 0) {
852 error = vn_lock(*vpp, lkflags);
853 if (error) {
854 vrele(*vpp);
855 *vpp = NULL;
856 }
857 }
858
859 out:
860 if (ntkey != &small_key)
861 free(ntkey, M_TEMP);
862 return error;
863 }
864
865 extern const struct vnodeopv_desc ntfs_vnodeop_opv_desc;
866
867 const struct vnodeopv_desc * const ntfs_vnodeopv_descs[] = {
868 &ntfs_vnodeop_opv_desc,
869 NULL,
870 };
871
872 struct vfsops ntfs_vfsops = {
873 .vfs_name = MOUNT_NTFS,
874 .vfs_min_mount_data = sizeof (struct ntfs_args),
875 .vfs_mount = ntfs_mount,
876 .vfs_start = ntfs_start,
877 .vfs_unmount = ntfs_unmount,
878 .vfs_root = ntfs_root,
879 .vfs_quotactl = (void *)eopnotsupp,
880 .vfs_statvfs = ntfs_statvfs,
881 .vfs_sync = ntfs_sync,
882 .vfs_vget = ntfs_vget,
883 .vfs_loadvnode = ntfs_loadvnode,
884 .vfs_fhtovp = ntfs_fhtovp,
885 .vfs_vptofh = ntfs_vptofh,
886 .vfs_init = ntfs_init,
887 .vfs_reinit = ntfs_reinit,
888 .vfs_done = ntfs_done,
889 .vfs_mountroot = ntfs_mountroot,
890 .vfs_snapshot = (void *)eopnotsupp,
891 .vfs_extattrctl = vfs_stdextattrctl,
892 .vfs_suspendctl = genfs_suspendctl,
893 .vfs_renamelock_enter = genfs_renamelock_enter,
894 .vfs_renamelock_exit = genfs_renamelock_exit,
895 .vfs_fsync = (void *)eopnotsupp,
896 .vfs_opv_descs = ntfs_vnodeopv_descs
897 };
898
899 static int
ntfs_modcmd(modcmd_t cmd,void * arg)900 ntfs_modcmd(modcmd_t cmd, void *arg)
901 {
902 int error;
903
904 switch (cmd) {
905 case MODULE_CMD_INIT:
906 error = vfs_attach(&ntfs_vfsops);
907 if (error != 0)
908 break;
909 sysctl_createv(&ntfs_sysctl_log, 0, NULL, NULL,
910 CTLFLAG_PERMANENT,
911 CTLTYPE_NODE, "ntfs",
912 SYSCTL_DESCR("NTFS file system"),
913 NULL, 0, NULL, 0,
914 CTL_VFS, 20, CTL_EOL);
915 /*
916 * XXX the "20" above could be dynamic, thereby eliminating
917 * one more instance of the "number to vfs" mapping problem,
918 * but "20" is the order as taken from sys/mount.h
919 */
920 break;
921 case MODULE_CMD_FINI:
922 error = vfs_detach(&ntfs_vfsops);
923 if (error != 0)
924 break;
925 sysctl_teardown(&ntfs_sysctl_log);
926 break;
927 default:
928 error = ENOTTY;
929 break;
930 }
931
932 return (error);
933 }
934