Annotation of src/sys/fs/msdosfs/msdosfs_vfsops.c, Revision 1.68
1.68 ! rumble 1: /* $NetBSD: msdosfs_vfsops.c,v 1.67 2008/05/16 09:21:59 hannken Exp $ */
1.1 jdolecek 2:
3: /*-
4: * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
5: * Copyright (C) 1994, 1995, 1997 TooLs GmbH.
6: * All rights reserved.
7: * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in the
16: * documentation and/or other materials provided with the distribution.
17: * 3. All advertising materials mentioning features or use of this software
18: * must display the following acknowledgement:
19: * This product includes software developed by TooLs GmbH.
20: * 4. The name of TooLs GmbH may not be used to endorse or promote products
21: * derived from this software without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
24: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26: * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
28: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
29: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
31: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
32: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33: */
34: /*
35: * Written by Paul Popelka (paulp@uts.amdahl.com)
36: *
37: * You can do anything you want with this software, just don't say you wrote
38: * it, and don't remove this notice.
39: *
40: * This software is provided "as is".
41: *
42: * The author supplies this software to be publicly redistributed on the
43: * understanding that the author is not responsible for the correct
44: * functioning of this software in any circumstances and is not liable for
45: * any damages caused by this software.
46: *
47: * October 1992
48: */
49:
50: #include <sys/cdefs.h>
1.68 ! rumble 51: __KERNEL_RCSID(0, "$NetBSD: msdosfs_vfsops.c,v 1.67 2008/05/16 09:21:59 hannken Exp $");
1.1 jdolecek 52:
53: #if defined(_KERNEL_OPT)
54: #include "opt_quota.h"
55: #include "opt_compat_netbsd.h"
56: #endif
57:
58: #include <sys/param.h>
59: #include <sys/systm.h>
1.12 atatat 60: #include <sys/sysctl.h>
1.1 jdolecek 61: #include <sys/namei.h>
62: #include <sys/proc.h>
63: #include <sys/kernel.h>
64: #include <sys/vnode.h>
1.60 dholland 65: #include <miscfs/genfs/genfs.h>
1.1 jdolecek 66: #include <miscfs/specfs/specdev.h> /* XXX */ /* defines v_rdev */
67: #include <sys/mount.h>
68: #include <sys/buf.h>
69: #include <sys/file.h>
70: #include <sys/device.h>
71: #include <sys/disklabel.h>
1.42 christos 72: #include <sys/disk.h>
1.1 jdolecek 73: #include <sys/ioctl.h>
74: #include <sys/malloc.h>
75: #include <sys/dirent.h>
76: #include <sys/stat.h>
77: #include <sys/conf.h>
1.31 elad 78: #include <sys/kauth.h>
1.66 rumble 79: #include <sys/module.h>
1.1 jdolecek 80:
81: #include <fs/msdosfs/bpb.h>
82: #include <fs/msdosfs/bootsect.h>
83: #include <fs/msdosfs/direntry.h>
84: #include <fs/msdosfs/denode.h>
85: #include <fs/msdosfs/msdosfsmount.h>
86: #include <fs/msdosfs/fat.h>
87:
1.66 rumble 88: MODULE(MODULE_CLASS_VFS, msdosfs, NULL);
89:
1.42 christos 90: #ifdef MSDOSFS_DEBUG
91: #define DPRINTF(a) uprintf a
92: #else
93: #define DPRINTF(a)
94: #endif
95:
1.20 jdolecek 96: #define MSDOSFS_NAMEMAX(pmp) \
97: (pmp)->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12
98:
1.50 pooka 99: VFS_PROTOS(msdosfs);
1.1 jdolecek 100:
1.29 christos 101: int msdosfs_mountfs(struct vnode *, struct mount *, struct lwp *,
1.26 xtraeme 102: struct msdosfs_args *);
1.1 jdolecek 103:
1.26 xtraeme 104: static int update_mp(struct mount *, struct msdosfs_args *);
1.2 thorpej 105:
1.45 pooka 106: MALLOC_JUSTDEFINE(M_MSDOSFSMNT, "MSDOSFS mount", "MSDOS FS mount structure");
107: MALLOC_JUSTDEFINE(M_MSDOSFSFAT, "MSDOSFS fat", "MSDOS FS fat table");
1.51 rumble 108: MALLOC_JUSTDEFINE(M_MSDOSFSTMP, "MSDOSFS temp", "MSDOS FS temp. structures");
1.1 jdolecek 109:
110: #define ROOTNAME "root_device"
111:
1.68 ! rumble 112: static struct sysctllog *msdosfs_sysctl_log;
! 113:
1.1 jdolecek 114: extern const struct vnodeopv_desc msdosfs_vnodeop_opv_desc;
115:
116: const struct vnodeopv_desc * const msdosfs_vnodeopv_descs[] = {
117: &msdosfs_vnodeop_opv_desc,
118: NULL,
119: };
120:
121: struct vfsops msdosfs_vfsops = {
122: MOUNT_MSDOS,
1.46 dsl 123: sizeof (struct msdosfs_args),
1.1 jdolecek 124: msdosfs_mount,
125: msdosfs_start,
126: msdosfs_unmount,
127: msdosfs_root,
1.54 pooka 128: (void *)eopnotsupp, /* vfs_quotactl */
1.14 christos 129: msdosfs_statvfs,
1.1 jdolecek 130: msdosfs_sync,
131: msdosfs_vget,
132: msdosfs_fhtovp,
133: msdosfs_vptofh,
134: msdosfs_init,
135: msdosfs_reinit,
136: msdosfs_done,
137: msdosfs_mountroot,
1.18 hannken 138: (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp,
1.21 thorpej 139: vfs_stdextattrctl,
1.49 pooka 140: (void *)eopnotsupp, /* vfs_suspendctl */
1.60 dholland 141: genfs_renamelock_enter,
142: genfs_renamelock_exit,
1.62 ad 143: (void *)eopnotsupp,
1.1 jdolecek 144: msdosfs_vnodeopv_descs,
1.35 christos 145: 0,
146: { NULL, NULL },
1.1 jdolecek 147: };
1.66 rumble 148:
149: static int
150: msdosfs_modcmd(modcmd_t cmd, void *arg)
151: {
1.68 ! rumble 152: int error;
1.66 rumble 153:
154: switch (cmd) {
155: case MODULE_CMD_INIT:
1.68 ! rumble 156: error = vfs_attach(&msdosfs_vfsops);
! 157: if (error != 0)
! 158: break;
! 159: sysctl_createv(&msdosfs_sysctl_log, 0, NULL, NULL,
! 160: CTLFLAG_PERMANENT,
! 161: CTLTYPE_NODE, "vfs", NULL,
! 162: NULL, 0, NULL, 0,
! 163: CTL_VFS, CTL_EOL);
! 164: sysctl_createv(&msdosfs_sysctl_log, 0, NULL, NULL,
! 165: CTLFLAG_PERMANENT,
! 166: CTLTYPE_NODE, "msdosfs",
! 167: SYSCTL_DESCR("MS-DOS file system"),
! 168: NULL, 0, NULL, 0,
! 169: CTL_VFS, 4, CTL_EOL);
! 170: /*
! 171: * XXX the "4" above could be dynamic, thereby eliminating one
! 172: * more instance of the "number to vfs" mapping problem, but
! 173: * "4" is the order as taken from sys/mount.h
! 174: */
! 175: break;
1.66 rumble 176: case MODULE_CMD_FINI:
1.68 ! rumble 177: error = vfs_detach(&msdosfs_vfsops);
! 178: if (error != 0)
! 179: break;
! 180: sysctl_teardown(&msdosfs_sysctl_log);
! 181: break;
1.66 rumble 182: default:
1.68 ! rumble 183: error = ENOTTY;
! 184: break;
1.66 rumble 185: }
1.68 ! rumble 186:
! 187: return (error);
1.66 rumble 188: }
1.1 jdolecek 189:
190: static int
1.6 thorpej 191: update_mp(mp, argp)
1.1 jdolecek 192: struct mount *mp;
193: struct msdosfs_args *argp;
194: {
195: struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
196: int error;
197:
198: pmp->pm_gid = argp->gid;
199: pmp->pm_uid = argp->uid;
200: pmp->pm_mask = argp->mask & ALLPERMS;
1.8 jdolecek 201: pmp->pm_dirmask = argp->dirmask & ALLPERMS;
1.9 itojun 202: pmp->pm_gmtoff = argp->gmtoff;
1.1 jdolecek 203: pmp->pm_flags |= argp->flags & MSDOSFSMNT_MNTOPT;
204:
205: /*
206: * GEMDOS knows nothing (yet) about win95
207: */
208: if (pmp->pm_flags & MSDOSFSMNT_GEMDOSFS)
209: pmp->pm_flags |= MSDOSFSMNT_NOWIN95;
210:
211: if (pmp->pm_flags & MSDOSFSMNT_NOWIN95)
212: pmp->pm_flags |= MSDOSFSMNT_SHORTNAME;
213: else if (!(pmp->pm_flags &
214: (MSDOSFSMNT_SHORTNAME | MSDOSFSMNT_LONGNAME))) {
1.24 christos 215: struct vnode *rtvp;
1.1 jdolecek 216:
217: /*
218: * Try to divine whether to support Win'95 long filenames
219: */
220: if (FAT32(pmp))
221: pmp->pm_flags |= MSDOSFSMNT_LONGNAME;
222: else {
1.24 christos 223: if ((error = msdosfs_root(mp, &rtvp)) != 0)
1.1 jdolecek 224: return error;
1.24 christos 225: pmp->pm_flags |= findwin95(VTODE(rtvp))
1.1 jdolecek 226: ? MSDOSFSMNT_LONGNAME
227: : MSDOSFSMNT_SHORTNAME;
1.24 christos 228: vput(rtvp);
1.1 jdolecek 229: }
230: }
1.20 jdolecek 231:
232: mp->mnt_stat.f_namemax = MSDOSFS_NAMEMAX(pmp);
233:
1.1 jdolecek 234: return 0;
235: }
236:
237: int
238: msdosfs_mountroot()
239: {
240: struct mount *mp;
1.29 christos 241: struct lwp *l = curlwp; /* XXX */
1.1 jdolecek 242: int error;
243: struct msdosfs_args args;
244:
1.30 thorpej 245: if (device_class(root_device) != DV_DISK)
1.1 jdolecek 246: return (ENODEV);
247:
248: if ((error = vfs_rootmountalloc(MOUNT_MSDOS, "root_device", &mp))) {
249: vrele(rootvp);
250: return (error);
251: }
252:
1.8 jdolecek 253: args.flags = MSDOSFSMNT_VERSIONED;
1.1 jdolecek 254: args.uid = 0;
255: args.gid = 0;
256: args.mask = 0777;
1.8 jdolecek 257: args.version = MSDOSFSMNT_VERSION;
258: args.dirmask = 0777;
1.1 jdolecek 259:
1.29 christos 260: if ((error = msdosfs_mountfs(rootvp, mp, l, &args)) != 0) {
1.63 ad 261: vfs_unbusy(mp, false, NULL);
1.65 ad 262: vfs_destroy(mp);
1.1 jdolecek 263: return (error);
264: }
265:
1.6 thorpej 266: if ((error = update_mp(mp, &args)) != 0) {
1.54 pooka 267: (void)msdosfs_unmount(mp, 0);
1.63 ad 268: vfs_unbusy(mp, false, NULL);
1.65 ad 269: vfs_destroy(mp);
1.1 jdolecek 270: vrele(rootvp);
271: return (error);
272: }
273:
1.53 ad 274: mutex_enter(&mountlist_lock);
1.1 jdolecek 275: CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
1.53 ad 276: mutex_exit(&mountlist_lock);
1.54 pooka 277: (void)msdosfs_statvfs(mp, &mp->mnt_stat);
1.63 ad 278: vfs_unbusy(mp, false, NULL);
1.1 jdolecek 279: return (0);
280: }
281:
282: /*
283: * mp - path - addr in user space of mount point (ie /usr or whatever)
284: * data - addr in user space of mount params including the name of the block
285: * special file to treat as a filesystem.
286: */
287: int
1.54 pooka 288: msdosfs_mount(mp, path, data, data_len)
1.1 jdolecek 289: struct mount *mp;
290: const char *path;
291: void *data;
1.46 dsl 292: size_t *data_len;
1.1 jdolecek 293: {
1.54 pooka 294: struct lwp *l = curlwp;
1.50 pooka 295: struct nameidata nd;
1.1 jdolecek 296: struct vnode *devvp; /* vnode for blk device to mount */
1.46 dsl 297: struct msdosfs_args *args = data; /* holds data from mount request */
1.1 jdolecek 298: /* msdosfs specific mount control block */
299: struct msdosfsmount *pmp = NULL;
300: int error, flags;
301: mode_t accessmode;
302:
1.46 dsl 303: if (*data_len < sizeof *args)
304: return EINVAL;
305:
1.1 jdolecek 306: if (mp->mnt_flag & MNT_GETARGS) {
307: pmp = VFSTOMSDOSFS(mp);
308: if (pmp == NULL)
309: return EIO;
1.46 dsl 310: args->fspec = NULL;
311: args->uid = pmp->pm_uid;
312: args->gid = pmp->pm_gid;
313: args->mask = pmp->pm_mask;
314: args->flags = pmp->pm_flags;
315: args->version = MSDOSFSMNT_VERSION;
316: args->dirmask = pmp->pm_dirmask;
317: args->gmtoff = pmp->pm_gmtoff;
318: *data_len = sizeof *args;
319: return 0;
1.42 christos 320: }
1.8 jdolecek 321:
322: /*
323: * If not versioned (i.e. using old mount_msdos(8)), fill in
324: * the additional structure items with suitable defaults.
325: */
1.46 dsl 326: if ((args->flags & MSDOSFSMNT_VERSIONED) == 0) {
327: args->version = 1;
328: args->dirmask = args->mask;
1.8 jdolecek 329: }
330:
1.1 jdolecek 331: /*
1.15 jdolecek 332: * Reset GMT offset for pre-v3 mount structure args.
333: */
1.46 dsl 334: if (args->version < 3)
335: args->gmtoff = 0;
1.15 jdolecek 336:
337: /*
1.1 jdolecek 338: * If updating, check whether changing from read-only to
339: * read/write; if there is no device name, that's all we do.
340: */
341: if (mp->mnt_flag & MNT_UPDATE) {
342: pmp = VFSTOMSDOSFS(mp);
343: error = 0;
344: if (!(pmp->pm_flags & MSDOSFSMNT_RONLY) && (mp->mnt_flag & MNT_RDONLY)) {
345: flags = WRITECLOSE;
346: if (mp->mnt_flag & MNT_FORCE)
347: flags |= FORCECLOSE;
348: error = vflush(mp, NULLVP, flags);
349: }
350: if (!error && (mp->mnt_flag & MNT_RELOAD))
351: /* not yet implemented */
352: error = EOPNOTSUPP;
1.42 christos 353: if (error) {
354: DPRINTF(("vflush %d\n", error));
1.1 jdolecek 355: return (error);
1.42 christos 356: }
1.11 dbj 357: if ((pmp->pm_flags & MSDOSFSMNT_RONLY) && (mp->mnt_iflag & IMNT_WANTRDWR)) {
1.1 jdolecek 358: /*
359: * If upgrade to read-write by non-root, then verify
360: * that user has necessary permissions on the device.
361: */
1.33 ad 362: if (kauth_authorize_generic(l->l_cred,
363: KAUTH_GENERIC_ISSUSER, NULL) != 0) {
1.1 jdolecek 364: devvp = pmp->pm_devvp;
365: vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
366: error = VOP_ACCESS(devvp, VREAD | VWRITE,
1.54 pooka 367: l->l_cred);
1.1 jdolecek 368: VOP_UNLOCK(devvp, 0);
1.42 christos 369: DPRINTF(("VOP_ACCESS %d\n", error));
1.1 jdolecek 370: if (error)
371: return (error);
372: }
373: pmp->pm_flags &= ~MSDOSFSMNT_RONLY;
374: }
1.46 dsl 375: if (args->fspec == NULL) {
1.42 christos 376: DPRINTF(("missing fspec\n"));
1.28 jmmv 377: return EINVAL;
1.42 christos 378: }
1.1 jdolecek 379: }
380: /*
381: * Not an update, or updating the name: look up the name
382: * and verify that it refers to a sensible block device.
383: */
1.55 pooka 384: NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec);
1.50 pooka 385: if ((error = namei(&nd)) != 0) {
1.42 christos 386: DPRINTF(("namei %d\n", error));
1.1 jdolecek 387: return (error);
1.42 christos 388: }
1.50 pooka 389: devvp = nd.ni_vp;
1.1 jdolecek 390:
391: if (devvp->v_type != VBLK) {
1.42 christos 392: DPRINTF(("not block\n"));
1.1 jdolecek 393: vrele(devvp);
394: return (ENOTBLK);
395: }
396: if (bdevsw_lookup(devvp->v_rdev) == NULL) {
1.42 christos 397: DPRINTF(("no block switch\n"));
1.1 jdolecek 398: vrele(devvp);
399: return (ENXIO);
400: }
401: /*
402: * If mount by non-root, then verify that user has necessary
403: * permissions on the device.
404: */
1.33 ad 405: if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL) != 0) {
1.1 jdolecek 406: accessmode = VREAD;
407: if ((mp->mnt_flag & MNT_RDONLY) == 0)
408: accessmode |= VWRITE;
409: vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
1.54 pooka 410: error = VOP_ACCESS(devvp, accessmode, l->l_cred);
1.1 jdolecek 411: VOP_UNLOCK(devvp, 0);
412: if (error) {
1.42 christos 413: DPRINTF(("VOP_ACCESS2 %d\n", error));
1.1 jdolecek 414: vrele(devvp);
415: return (error);
416: }
417: }
418: if ((mp->mnt_flag & MNT_UPDATE) == 0) {
1.24 christos 419: int xflags;
1.22 mycroft 420:
421: if (mp->mnt_flag & MNT_RDONLY)
1.24 christos 422: xflags = FREAD;
1.22 mycroft 423: else
1.24 christos 424: xflags = FREAD|FWRITE;
1.54 pooka 425: error = VOP_OPEN(devvp, xflags, FSCRED);
1.42 christos 426: if (error) {
427: DPRINTF(("VOP_OPEN %d\n", error));
1.22 mycroft 428: goto fail;
1.42 christos 429: }
1.46 dsl 430: error = msdosfs_mountfs(devvp, mp, l, args);
1.22 mycroft 431: if (error) {
1.42 christos 432: DPRINTF(("msdosfs_mountfs %d\n", error));
1.22 mycroft 433: vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
1.54 pooka 434: (void) VOP_CLOSE(devvp, xflags, NOCRED);
1.22 mycroft 435: VOP_UNLOCK(devvp, 0);
436: goto fail;
437: }
1.1 jdolecek 438: #ifdef MSDOSFS_DEBUG /* only needed for the printf below */
439: pmp = VFSTOMSDOSFS(mp);
440: #endif
441: } else {
1.22 mycroft 442: vrele(devvp);
1.42 christos 443: if (devvp != pmp->pm_devvp) {
444: DPRINTF(("devvp %p pmp %p\n",
445: devvp, pmp->pm_devvp));
1.22 mycroft 446: return (EINVAL); /* needs translation */
1.42 christos 447: }
1.1 jdolecek 448: }
1.46 dsl 449: if ((error = update_mp(mp, args)) != 0) {
1.54 pooka 450: msdosfs_unmount(mp, MNT_FORCE);
1.42 christos 451: DPRINTF(("update_mp %d\n", error));
1.1 jdolecek 452: return error;
453: }
454:
455: #ifdef MSDOSFS_DEBUG
456: printf("msdosfs_mount(): mp %p, pmp %p, inusemap %p\n", mp, pmp, pmp->pm_inusemap);
457: #endif
1.46 dsl 458: return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE,
1.47 pooka 459: mp->mnt_op->vfs_name, mp, l);
1.22 mycroft 460:
461: fail:
462: vrele(devvp);
463: return (error);
1.1 jdolecek 464: }
465:
466: int
1.29 christos 467: msdosfs_mountfs(devvp, mp, l, argp)
1.1 jdolecek 468: struct vnode *devvp;
469: struct mount *mp;
1.29 christos 470: struct lwp *l;
1.1 jdolecek 471: struct msdosfs_args *argp;
472: {
473: struct msdosfsmount *pmp;
474: struct buf *bp;
475: dev_t dev = devvp->v_rdev;
476: struct partinfo dpart;
477: union bootsector *bsp;
478: struct byte_bpb33 *b33;
479: struct byte_bpb50 *b50;
480: struct byte_bpb710 *b710;
481: u_int8_t SecPerClust;
1.42 christos 482: int ronly, error, tmp;
483: int bsize, dtype, fstype, secsize;
484: u_int64_t psize;
1.1 jdolecek 485:
1.22 mycroft 486: /* Flush out any old buffers remaining from a previous use. */
1.33 ad 487: if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0)
1.1 jdolecek 488: return (error);
489:
490: ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
491:
492: bp = NULL; /* both used in error_exit */
493: pmp = NULL;
494:
1.40 scw 495: /*
496: * We need the disklabel to calculate the size of a FAT entry
497: * later on. Also make sure the partition contains a filesystem
498: * of type FS_MSDOS. This doesn't work for floppies, so we have
499: * to check for them too.
500: *
501: * There might still be parts of the msdos fs driver which assume
502: * that the size of a disk block will always be 512 bytes.
503: * Let's root them out...
504: */
1.54 pooka 505: error = VOP_IOCTL(devvp, DIOCGPART, &dpart, FREAD, NOCRED);
1.42 christos 506: if (error == 0) {
507: secsize = dpart.disklab->d_secsize;
508: dtype = dpart.disklab->d_type;
509: fstype = dpart.part->p_fstype;
510: psize = dpart.part->p_size;
511: } else {
512: struct dkwedge_info dkw;
1.54 pooka 513: error = VOP_IOCTL(devvp, DIOCGWEDGEINFO, &dkw, FREAD, NOCRED);
1.44 kochi 514: secsize = 512; /* XXX */
515: dtype = DTYPE_FLOPPY; /* XXX */
516: fstype = FS_MSDOS;
517: psize = -1;
1.42 christos 518: if (error) {
1.44 kochi 519: if (error != ENOTTY) {
520: DPRINTF(("Error getting partition info %d\n",
521: error));
522: goto error_exit;
523: }
524: } else {
525: fstype = strcmp(dkw.dkw_ptype, DKW_PTYPE_FAT) == 0 ?
526: FS_MSDOS : -1;
527: psize = dkw.dkw_size;
1.42 christos 528: }
529: }
1.1 jdolecek 530: if (argp->flags & MSDOSFSMNT_GEMDOSFS) {
1.42 christos 531: bsize = secsize;
532: if (bsize != 512 ||
533: (dtype != DTYPE_FLOPPY && fstype != FS_MSDOS)) {
534: DPRINTF(("bsize %d dtype %d fstype %d\n", bsize, dtype,
535: fstype));
1.1 jdolecek 536: error = EINVAL;
537: goto error_exit;
538: }
1.42 christos 539: } else
540: bsize = 0;
1.1 jdolecek 541:
542: /*
543: * Read the boot sector of the filesystem, and then check the
544: * boot signature. If not a dos boot sector then error out.
545: */
1.67 hannken 546: if ((error = bread(devvp, 0, secsize, NOCRED, 0, &bp)) != 0)
1.1 jdolecek 547: goto error_exit;
548: bsp = (union bootsector *)bp->b_data;
549: b33 = (struct byte_bpb33 *)bsp->bs33.bsBPB;
550: b50 = (struct byte_bpb50 *)bsp->bs50.bsBPB;
1.10 lukem 551: b710 = (struct byte_bpb710 *)bsp->bs710.bsBPB;
1.1 jdolecek 552:
553: if (!(argp->flags & MSDOSFSMNT_GEMDOSFS)) {
554: if (bsp->bs50.bsBootSectSig0 != BOOTSIG0
555: || bsp->bs50.bsBootSectSig1 != BOOTSIG1) {
1.42 christos 556: DPRINTF(("bootsig0 %d bootsig1 %d\n",
557: bsp->bs50.bsBootSectSig0,
558: bsp->bs50.bsBootSectSig1));
1.1 jdolecek 559: error = EINVAL;
560: goto error_exit;
561: }
562: }
563:
564: pmp = malloc(sizeof *pmp, M_MSDOSFSMNT, M_WAITOK);
1.3 dsl 565: memset(pmp, 0, sizeof *pmp);
1.1 jdolecek 566: pmp->pm_mountp = mp;
567:
568: /*
569: * Compute several useful quantities from the bpb in the
570: * bootsector. Copy in the dos 5 variant of the bpb then fix up
571: * the fields that are different between dos 5 and dos 3.3.
572: */
573: SecPerClust = b50->bpbSecPerClust;
574: pmp->pm_BytesPerSec = getushort(b50->bpbBytesPerSec);
575: pmp->pm_ResSectors = getushort(b50->bpbResSectors);
576: pmp->pm_FATs = b50->bpbFATs;
577: pmp->pm_RootDirEnts = getushort(b50->bpbRootDirEnts);
578: pmp->pm_Sectors = getushort(b50->bpbSectors);
579: pmp->pm_FATsecs = getushort(b50->bpbFATsecs);
580: pmp->pm_SecPerTrack = getushort(b50->bpbSecPerTrack);
581: pmp->pm_Heads = getushort(b50->bpbHeads);
582: pmp->pm_Media = b50->bpbMedia;
583:
584: if (!(argp->flags & MSDOSFSMNT_GEMDOSFS)) {
585: /* XXX - We should probably check more values here */
586: if (!pmp->pm_BytesPerSec || !SecPerClust
587: || pmp->pm_Heads > 255 || pmp->pm_SecPerTrack > 63) {
1.42 christos 588: DPRINTF(("bytespersec %d secperclust %d "
589: "heads %d secpertrack %d\n",
590: pmp->pm_BytesPerSec, SecPerClust,
591: pmp->pm_Heads, pmp->pm_SecPerTrack));
1.1 jdolecek 592: error = EINVAL;
593: goto error_exit;
594: }
595: }
596:
597: if (pmp->pm_Sectors == 0) {
598: pmp->pm_HiddenSects = getulong(b50->bpbHiddenSecs);
599: pmp->pm_HugeSectors = getulong(b50->bpbHugeSectors);
600: } else {
601: pmp->pm_HiddenSects = getushort(b33->bpbHiddenSecs);
602: pmp->pm_HugeSectors = pmp->pm_Sectors;
603: }
604:
605: if (pmp->pm_RootDirEnts == 0) {
1.42 christos 606: unsigned short vers = getushort(b710->bpbFSVers);
1.34 gdt 607: /*
608: * Some say that bsBootSectSig[23] must be zero, but
609: * Windows does not require this and some digital cameras
610: * do not set these to zero. Therefore, do not insist.
611: */
1.42 christos 612: if (pmp->pm_Sectors || pmp->pm_FATsecs || vers) {
613: DPRINTF(("sectors %d fatsecs %lu vers %d\n",
614: pmp->pm_Sectors, pmp->pm_FATsecs, vers));
1.1 jdolecek 615: error = EINVAL;
616: goto error_exit;
617: }
618: pmp->pm_fatmask = FAT32_MASK;
619: pmp->pm_fatmult = 4;
620: pmp->pm_fatdiv = 1;
621: pmp->pm_FATsecs = getulong(b710->bpbBigFATsecs);
622:
623: /* mirrorring is enabled if the FATMIRROR bit is not set */
624: if ((getushort(b710->bpbExtFlags) & FATMIRROR) == 0)
625: pmp->pm_flags |= MSDOSFS_FATMIRROR;
626: else
627: pmp->pm_curfat = getushort(b710->bpbExtFlags) & FATNUM;
628: } else
629: pmp->pm_flags |= MSDOSFS_FATMIRROR;
630:
631: if (argp->flags & MSDOSFSMNT_GEMDOSFS) {
632: if (FAT32(pmp)) {
1.42 christos 633: DPRINTF(("fat32 for gemdos\n"));
1.1 jdolecek 634: /*
635: * GEMDOS doesn't know fat32.
636: */
637: error = EINVAL;
638: goto error_exit;
639: }
640:
641: /*
642: * Check a few values (could do some more):
643: * - logical sector size: power of 2, >= block size
644: * - sectors per cluster: power of 2, >= 1
645: * - number of sectors: >= 1, <= size of partition
646: */
647: if ( (SecPerClust == 0)
648: || (SecPerClust & (SecPerClust - 1))
649: || (pmp->pm_BytesPerSec < bsize)
650: || (pmp->pm_BytesPerSec & (pmp->pm_BytesPerSec - 1))
651: || (pmp->pm_HugeSectors == 0)
652: || (pmp->pm_HugeSectors * (pmp->pm_BytesPerSec / bsize)
1.42 christos 653: > psize)) {
654: DPRINTF(("consistency checks for gemdos\n"));
1.1 jdolecek 655: error = EINVAL;
656: goto error_exit;
657: }
658: /*
659: * XXX - Many parts of the msdos fs driver seem to assume that
660: * the number of bytes per logical sector (BytesPerSec) will
661: * always be the same as the number of bytes per disk block
662: * Let's pretend it is.
663: */
664: tmp = pmp->pm_BytesPerSec / bsize;
665: pmp->pm_BytesPerSec = bsize;
666: pmp->pm_HugeSectors *= tmp;
667: pmp->pm_HiddenSects *= tmp;
668: pmp->pm_ResSectors *= tmp;
669: pmp->pm_Sectors *= tmp;
670: pmp->pm_FATsecs *= tmp;
671: SecPerClust *= tmp;
672: }
1.58 pooka 673:
674: /* Check that fs has nonzero FAT size */
675: if (pmp->pm_FATsecs == 0) {
676: DPRINTF(("FATsecs is 0\n"));
677: error = EINVAL;
678: goto error_exit;
679: }
680:
1.1 jdolecek 681: pmp->pm_fatblk = pmp->pm_ResSectors;
682: if (FAT32(pmp)) {
683: pmp->pm_rootdirblk = getulong(b710->bpbRootClust);
684: pmp->pm_firstcluster = pmp->pm_fatblk
685: + (pmp->pm_FATs * pmp->pm_FATsecs);
686: pmp->pm_fsinfo = getushort(b710->bpbFSInfo);
687: } else {
688: pmp->pm_rootdirblk = pmp->pm_fatblk +
689: (pmp->pm_FATs * pmp->pm_FATsecs);
690: pmp->pm_rootdirsize = (pmp->pm_RootDirEnts * sizeof(struct direntry)
691: + pmp->pm_BytesPerSec - 1)
692: / pmp->pm_BytesPerSec;/* in sectors */
693: pmp->pm_firstcluster = pmp->pm_rootdirblk + pmp->pm_rootdirsize;
694: }
695:
696: pmp->pm_nmbrofclusters = (pmp->pm_HugeSectors - pmp->pm_firstcluster) /
697: SecPerClust;
698: pmp->pm_maxcluster = pmp->pm_nmbrofclusters + 1;
699: pmp->pm_fatsize = pmp->pm_FATsecs * pmp->pm_BytesPerSec;
700:
701: if (argp->flags & MSDOSFSMNT_GEMDOSFS) {
702: if (pmp->pm_nmbrofclusters <= (0xff0 - 2)
703: && (dtype == DTYPE_FLOPPY
704: || (dtype == DTYPE_VND
705: && (pmp->pm_Heads == 1 || pmp->pm_Heads == 2)))
706: ) {
707: pmp->pm_fatmask = FAT12_MASK;
708: pmp->pm_fatmult = 3;
709: pmp->pm_fatdiv = 2;
710: } else {
711: pmp->pm_fatmask = FAT16_MASK;
712: pmp->pm_fatmult = 2;
713: pmp->pm_fatdiv = 1;
714: }
715: } else if (pmp->pm_fatmask == 0) {
716: if (pmp->pm_maxcluster
717: <= ((CLUST_RSRVD - CLUST_FIRST) & FAT12_MASK)) {
718: /*
719: * This will usually be a floppy disk. This size makes
720: * sure that one fat entry will not be split across
721: * multiple blocks.
722: */
723: pmp->pm_fatmask = FAT12_MASK;
724: pmp->pm_fatmult = 3;
725: pmp->pm_fatdiv = 2;
726: } else {
727: pmp->pm_fatmask = FAT16_MASK;
728: pmp->pm_fatmult = 2;
729: pmp->pm_fatdiv = 1;
730: }
731: }
732: if (FAT12(pmp))
733: pmp->pm_fatblocksize = 3 * pmp->pm_BytesPerSec;
734: else
735: pmp->pm_fatblocksize = MAXBSIZE;
736:
737: pmp->pm_fatblocksec = pmp->pm_fatblocksize / pmp->pm_BytesPerSec;
738: pmp->pm_bnshift = ffs(pmp->pm_BytesPerSec) - 1;
739:
740: /*
741: * Compute mask and shift value for isolating cluster relative byte
742: * offsets and cluster numbers from a file offset.
743: */
744: pmp->pm_bpcluster = SecPerClust * pmp->pm_BytesPerSec;
745: pmp->pm_crbomask = pmp->pm_bpcluster - 1;
746: pmp->pm_cnshift = ffs(pmp->pm_bpcluster) - 1;
747:
748: /*
749: * Check for valid cluster size
750: * must be a power of 2
751: */
752: if (pmp->pm_bpcluster ^ (1 << pmp->pm_cnshift)) {
1.42 christos 753: DPRINTF(("bpcluster %lu cnshift %lu\n",
754: pmp->pm_bpcluster, pmp->pm_cnshift));
1.1 jdolecek 755: error = EINVAL;
756: goto error_exit;
757: }
758:
759: /*
760: * Release the bootsector buffer.
761: */
1.52 ad 762: brelse(bp, BC_AGE);
1.1 jdolecek 763: bp = NULL;
764:
765: /*
766: * Check FSInfo.
767: */
768: if (pmp->pm_fsinfo) {
769: struct fsinfo *fp;
770:
1.40 scw 771: /*
772: * XXX If the fsinfo block is stored on media with
773: * 2KB or larger sectors, is the fsinfo structure
774: * padded at the end or in the middle?
775: */
776: if ((error = bread(devvp, de_bn2kb(pmp, pmp->pm_fsinfo),
1.67 hannken 777: pmp->pm_BytesPerSec, NOCRED, 0, &bp)) != 0)
1.1 jdolecek 778: goto error_exit;
779: fp = (struct fsinfo *)bp->b_data;
780: if (!memcmp(fp->fsisig1, "RRaA", 4)
781: && !memcmp(fp->fsisig2, "rrAa", 4)
782: && !memcmp(fp->fsisig3, "\0\0\125\252", 4)
783: && !memcmp(fp->fsisig4, "\0\0\125\252", 4))
784: pmp->pm_nxtfree = getulong(fp->fsinxtfree);
785: else
786: pmp->pm_fsinfo = 0;
1.52 ad 787: brelse(bp, 0);
1.1 jdolecek 788: bp = NULL;
789: }
790:
791: /*
792: * Check and validate (or perhaps invalidate?) the fsinfo structure?
793: * XXX
794: */
795: if (pmp->pm_fsinfo) {
796: if (pmp->pm_nxtfree == (u_long)-1)
797: pmp->pm_fsinfo = 0;
798: }
799:
800: /*
801: * Allocate memory for the bitmap of allocated clusters, and then
802: * fill it in.
803: */
804: pmp->pm_inusemap = malloc(((pmp->pm_maxcluster + N_INUSEBITS - 1)
805: / N_INUSEBITS)
806: * sizeof(*pmp->pm_inusemap),
807: M_MSDOSFSFAT, M_WAITOK);
808:
809: /*
810: * fillinusemap() needs pm_devvp.
811: */
812: pmp->pm_dev = dev;
813: pmp->pm_devvp = devvp;
814:
815: /*
816: * Have the inuse map filled in.
817: */
1.42 christos 818: if ((error = fillinusemap(pmp)) != 0) {
819: DPRINTF(("fillinusemap %d\n", error));
1.1 jdolecek 820: goto error_exit;
1.42 christos 821: }
1.1 jdolecek 822:
823: /*
824: * If they want fat updates to be synchronous then let them suffer
825: * the performance degradation in exchange for the on disk copy of
826: * the fat being correct just about all the time. I suppose this
827: * would be a good thing to turn on if the kernel is still flakey.
828: */
829: if (mp->mnt_flag & MNT_SYNCHRONOUS)
830: pmp->pm_flags |= MSDOSFSMNT_WAITONFAT;
831:
832: /*
833: * Finish up.
834: */
835: if (ronly)
836: pmp->pm_flags |= MSDOSFSMNT_RONLY;
837: else
838: pmp->pm_fmod = 1;
839: mp->mnt_data = pmp;
1.20 jdolecek 840: mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev;
841: mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_MSDOS);
842: mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0];
843: mp->mnt_stat.f_namemax = MSDOSFS_NAMEMAX(pmp);
1.1 jdolecek 844: mp->mnt_flag |= MNT_LOCAL;
845: mp->mnt_dev_bshift = pmp->pm_bnshift;
846: mp->mnt_fs_bshift = pmp->pm_cnshift;
847:
848: #ifdef QUOTA
849: /*
850: * If we ever do quotas for DOS filesystems this would be a place
851: * to fill in the info in the msdosfsmount structure. You dolt,
852: * quotas on dos filesystems make no sense because files have no
853: * owners on dos filesystems. of course there is some empty space
854: * in the directory entry where we could put uid's and gid's.
855: */
856: #endif
857: devvp->v_specmountpoint = mp;
858:
859: return (0);
860:
861: error_exit:;
862: if (bp)
1.52 ad 863: brelse(bp, BC_AGE);
1.1 jdolecek 864: if (pmp) {
865: if (pmp->pm_inusemap)
866: free(pmp->pm_inusemap, M_MSDOSFSFAT);
867: free(pmp, M_MSDOSFSMNT);
868: mp->mnt_data = NULL;
869: }
870: return (error);
871: }
872:
873: int
1.54 pooka 874: msdosfs_start(struct mount *mp, int flags)
1.1 jdolecek 875: {
876:
877: return (0);
878: }
879:
880: /*
881: * Unmount the filesystem described by mp.
882: */
883: int
1.54 pooka 884: msdosfs_unmount(mp, mntflags)
1.1 jdolecek 885: struct mount *mp;
886: int mntflags;
887: {
888: struct msdosfsmount *pmp;
889: int error, flags;
890:
891: flags = 0;
892: if (mntflags & MNT_FORCE)
893: flags |= FORCECLOSE;
894: #ifdef QUOTA
895: #endif
896: if ((error = vflush(mp, NULLVP, flags)) != 0)
897: return (error);
898: pmp = VFSTOMSDOSFS(mp);
899: if (pmp->pm_devvp->v_type != VBAD)
900: pmp->pm_devvp->v_specmountpoint = NULL;
901: #ifdef MSDOSFS_DEBUG
902: {
903: struct vnode *vp = pmp->pm_devvp;
904:
905: printf("msdosfs_umount(): just before calling VOP_CLOSE()\n");
1.64 ad 906: printf("flag %08x, usecount %d, writecount %d, holdcnt %d\n",
1.53 ad 907: vp->v_vflag | vp->v_iflag | vp->v_uflag, vp->v_usecount,
908: vp->v_writecount, vp->v_holdcnt);
1.25 jmmv 909: printf("mount %p, op %p\n",
910: vp->v_mount, vp->v_op);
1.1 jdolecek 911: printf("freef %p, freeb %p, mount %p\n",
912: vp->v_freelist.tqe_next, vp->v_freelist.tqe_prev,
913: vp->v_mount);
914: printf("cleanblkhd %p, dirtyblkhd %p, numoutput %d, type %d\n",
915: vp->v_cleanblkhd.lh_first,
916: vp->v_dirtyblkhd.lh_first,
917: vp->v_numoutput, vp->v_type);
918: printf("union %p, tag %d, data[0] %08x, data[1] %08x\n",
919: vp->v_socket, vp->v_tag,
920: ((u_int *)vp->v_data)[0],
921: ((u_int *)vp->v_data)[1]);
922: }
923: #endif
924: vn_lock(pmp->pm_devvp, LK_EXCLUSIVE | LK_RETRY);
925: error = VOP_CLOSE(pmp->pm_devvp,
1.54 pooka 926: pmp->pm_flags & MSDOSFSMNT_RONLY ? FREAD : FREAD|FWRITE, NOCRED);
1.1 jdolecek 927: vput(pmp->pm_devvp);
928: free(pmp->pm_inusemap, M_MSDOSFSFAT);
929: free(pmp, M_MSDOSFSMNT);
930: mp->mnt_data = NULL;
931: mp->mnt_flag &= ~MNT_LOCAL;
932: return (error);
933: }
934:
935: int
1.6 thorpej 936: msdosfs_root(mp, vpp)
1.1 jdolecek 937: struct mount *mp;
938: struct vnode **vpp;
939: {
940: struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
941: struct denode *ndep;
942: int error;
943:
944: #ifdef MSDOSFS_DEBUG
945: printf("msdosfs_root(); mp %p, pmp %p\n", mp, pmp);
946: #endif
947: if ((error = deget(pmp, MSDOSFSROOT, MSDOSFSROOT_OFS, &ndep)) != 0)
948: return (error);
949: *vpp = DETOV(ndep);
950: return (0);
951: }
952:
953: int
1.54 pooka 954: msdosfs_statvfs(struct mount *mp, struct statvfs *sbp)
1.1 jdolecek 955: {
956: struct msdosfsmount *pmp;
957:
958: pmp = VFSTOMSDOSFS(mp);
959: sbp->f_bsize = pmp->pm_bpcluster;
1.14 christos 960: sbp->f_frsize = sbp->f_bsize;
1.1 jdolecek 961: sbp->f_iosize = pmp->pm_bpcluster;
962: sbp->f_blocks = pmp->pm_nmbrofclusters;
963: sbp->f_bfree = pmp->pm_freeclustercount;
964: sbp->f_bavail = pmp->pm_freeclustercount;
1.14 christos 965: sbp->f_bresvd = 0;
1.1 jdolecek 966: sbp->f_files = pmp->pm_RootDirEnts; /* XXX */
967: sbp->f_ffree = 0; /* what to put in here? */
1.14 christos 968: sbp->f_favail = 0; /* what to put in here? */
969: sbp->f_fresvd = 0;
970: copy_statvfs_info(sbp, mp);
1.1 jdolecek 971: return (0);
972: }
973:
974: int
1.54 pooka 975: msdosfs_sync(mp, waitfor, cred)
1.1 jdolecek 976: struct mount *mp;
977: int waitfor;
1.31 elad 978: kauth_cred_t cred;
1.1 jdolecek 979: {
1.56 ad 980: struct vnode *vp, *mvp;
1.1 jdolecek 981: struct denode *dep;
982: struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
983: int error, allerror = 0;
984:
985: /*
986: * If we ever switch to not updating all of the fats all the time,
987: * this would be the place to update them from the first one.
988: */
989: if (pmp->pm_fmod != 0) {
990: if (pmp->pm_flags & MSDOSFSMNT_RONLY)
991: panic("msdosfs_sync: rofs mod");
992: else {
993: /* update fats here */
994: }
995: }
1.56 ad 996: /* Allocate a marker vnode. */
1.57 pooka 997: if ((mvp = vnalloc(mp)) == NULL)
1.56 ad 998: return ENOMEM;
1.1 jdolecek 999: /*
1000: * Write back each (modified) denode.
1001: */
1.56 ad 1002: mutex_enter(&mntvnode_lock);
1.1 jdolecek 1003: loop:
1.56 ad 1004: for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = vunmark(mvp)) {
1005: vmark(mvp, vp);
1006: if (vp->v_mount != mp || vismarker(vp))
1007: continue;
1008: mutex_enter(&vp->v_interlock);
1.1 jdolecek 1009: dep = VTODE(vp);
1010: if (waitfor == MNT_LAZY || vp->v_type == VNON ||
1011: (((dep->de_flag &
1012: (DE_ACCESS | DE_CREATE | DE_UPDATE | DE_MODIFIED)) == 0) &&
1013: (LIST_EMPTY(&vp->v_dirtyblkhd) &&
1.48 pooka 1014: UVM_OBJ_IS_CLEAN(&vp->v_uobj)))) {
1.56 ad 1015: mutex_exit(&vp->v_interlock);
1.1 jdolecek 1016: continue;
1017: }
1.56 ad 1018: mutex_exit(&mntvnode_lock);
1.6 thorpej 1019: error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK);
1.1 jdolecek 1020: if (error) {
1.56 ad 1021: mutex_enter(&mntvnode_lock);
1022: if (error == ENOENT) {
1023: (void)vunmark(mvp);
1.1 jdolecek 1024: goto loop;
1.56 ad 1025: }
1.1 jdolecek 1026: continue;
1027: }
1028: if ((error = VOP_FSYNC(vp, cred,
1.54 pooka 1029: waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0)) != 0)
1.1 jdolecek 1030: allerror = error;
1031: vput(vp);
1.56 ad 1032: mutex_enter(&mntvnode_lock);
1.1 jdolecek 1033: }
1.56 ad 1034: mutex_exit(&mntvnode_lock);
1.57 pooka 1035: vnfree(mvp);
1.56 ad 1036:
1.1 jdolecek 1037: /*
1038: * Force stale file system control information to be flushed.
1039: */
1040: if ((error = VOP_FSYNC(pmp->pm_devvp, cred,
1.54 pooka 1041: waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0)) != 0)
1.1 jdolecek 1042: allerror = error;
1043: #ifdef QUOTA
1044: /* qsync(mp); */
1045: #endif
1046: return (allerror);
1047: }
1048:
1049: int
1.6 thorpej 1050: msdosfs_fhtovp(mp, fhp, vpp)
1.1 jdolecek 1051: struct mount *mp;
1052: struct fid *fhp;
1053: struct vnode **vpp;
1054: {
1055: struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
1.32 martin 1056: struct defid defh;
1.1 jdolecek 1057: struct denode *dep;
1058: int error;
1059:
1.42 christos 1060: if (fhp->fid_len != sizeof(struct defid)) {
1061: DPRINTF(("fid_len %d %zd\n", fhp->fid_len,
1062: sizeof(struct defid)));
1.32 martin 1063: return EINVAL;
1.42 christos 1064: }
1.32 martin 1065:
1066: memcpy(&defh, fhp, sizeof(defh));
1067: error = deget(pmp, defh.defid_dirclust, defh.defid_dirofs, &dep);
1.1 jdolecek 1068: if (error) {
1.42 christos 1069: DPRINTF(("deget %d\n", error));
1.1 jdolecek 1070: *vpp = NULLVP;
1071: return (error);
1072: }
1073: *vpp = DETOV(dep);
1074: return (0);
1075: }
1076:
1077: int
1.32 martin 1078: msdosfs_vptofh(vp, fhp, fh_size)
1.1 jdolecek 1079: struct vnode *vp;
1080: struct fid *fhp;
1.32 martin 1081: size_t *fh_size;
1.1 jdolecek 1082: {
1083: struct denode *dep;
1.32 martin 1084: struct defid defh;
1.1 jdolecek 1085:
1.32 martin 1086: if (*fh_size < sizeof(struct defid)) {
1087: *fh_size = sizeof(struct defid);
1088: return E2BIG;
1089: }
1090: *fh_size = sizeof(struct defid);
1.1 jdolecek 1091: dep = VTODE(vp);
1.32 martin 1092: memset(&defh, 0, sizeof(defh));
1093: defh.defid_len = sizeof(struct defid);
1094: defh.defid_dirclust = dep->de_dirclust;
1095: defh.defid_dirofs = dep->de_diroffset;
1096: /* defh.defid_gen = dep->de_gen; */
1097: memcpy(fhp, &defh, sizeof(defh));
1.1 jdolecek 1098: return (0);
1099: }
1100:
1101: int
1.39 christos 1102: msdosfs_vget(struct mount *mp, ino_t ino,
1103: struct vnode **vpp)
1.1 jdolecek 1104: {
1105:
1106: return (EOPNOTSUPP);
1107: }
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