Annotation of src/sys/fs/msdosfs/msdosfs_vnops.c, Revision 1.48
1.48 ! ad 1: /* $NetBSD: msdosfs_vnops.c,v 1.47 2008/01/05 18:42:14 christos 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>
1.48 ! ad 51: __KERNEL_RCSID(0, "$NetBSD: msdosfs_vnops.c,v 1.47 2008/01/05 18:42:14 christos Exp $");
1.1 jdolecek 52:
53: #include <sys/param.h>
54: #include <sys/systm.h>
55: #include <sys/namei.h>
56: #include <sys/resourcevar.h> /* defines plimit structure in proc struct */
57: #include <sys/kernel.h>
58: #include <sys/file.h> /* define FWRITE ... */
59: #include <sys/stat.h>
60: #include <sys/buf.h>
61: #include <sys/proc.h>
62: #include <sys/mount.h>
63: #include <sys/vnode.h>
64: #include <sys/signalvar.h>
65: #include <sys/malloc.h>
66: #include <sys/dirent.h>
67: #include <sys/lockf.h>
1.28 elad 68: #include <sys/kauth.h>
1.1 jdolecek 69:
70: #include <miscfs/genfs/genfs.h>
71: #include <miscfs/specfs/specdev.h> /* XXX */ /* defines v_rdev */
72:
73: #include <uvm/uvm_extern.h>
74:
75: #include <fs/msdosfs/bpb.h>
76: #include <fs/msdosfs/direntry.h>
77: #include <fs/msdosfs/denode.h>
78: #include <fs/msdosfs/msdosfsmount.h>
79: #include <fs/msdosfs/fat.h>
80:
81: /*
82: * Some general notes:
83: *
84: * In the ufs filesystem the inodes, superblocks, and indirect blocks are
85: * read/written using the vnode for the filesystem. Blocks that represent
86: * the contents of a file are read/written using the vnode for the file
87: * (including directories when they are read/written as files). This
88: * presents problems for the dos filesystem because data that should be in
89: * an inode (if dos had them) resides in the directory itself. Since we
90: * must update directory entries without the benefit of having the vnode
91: * for the directory we must use the vnode for the filesystem. This means
92: * that when a directory is actually read/written (via read, write, or
93: * readdir, or seek) we must use the vnode for the filesystem instead of
94: * the vnode for the directory as would happen in ufs. This is to insure we
95: * retrieve the correct block from the buffer cache since the hash value is
96: * based upon the vnode address and the desired block number.
97: */
98:
99: /*
100: * Create a regular file. On entry the directory to contain the file being
101: * created is locked. We must release before we return. We must also free
102: * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or
103: * only if the SAVESTART bit in cn_flags is clear on success.
104: */
105: int
106: msdosfs_create(v)
107: void *v;
108: {
109: struct vop_create_args /* {
110: struct vnode *a_dvp;
111: struct vnode **a_vpp;
112: struct componentname *a_cnp;
113: struct vattr *a_vap;
114: } */ *ap = v;
115: struct componentname *cnp = ap->a_cnp;
116: struct denode ndirent;
117: struct denode *dep;
118: struct denode *pdep = VTODE(ap->a_dvp);
119: int error;
120:
121: #ifdef MSDOSFS_DEBUG
122: printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap);
123: #endif
124:
125: /*
126: * If this is the root directory and there is no space left we
127: * can't do anything. This is because the root directory can not
128: * change size.
129: */
130: if (pdep->de_StartCluster == MSDOSFSROOT
131: && pdep->de_fndoffset >= pdep->de_FileSize) {
132: error = ENOSPC;
133: goto bad;
134: }
135:
136: /*
137: * Create a directory entry for the file, then call createde() to
138: * have it installed. NOTE: DOS files are always executable. We
139: * use the absence of the owner write bit to make the file
140: * readonly.
141: */
142: #ifdef DIAGNOSTIC
143: if ((cnp->cn_flags & HASBUF) == 0)
144: panic("msdosfs_create: no name");
145: #endif
146: memset(&ndirent, 0, sizeof(ndirent));
147: if ((error = uniqdosname(pdep, cnp, ndirent.de_Name)) != 0)
148: goto bad;
149:
150: ndirent.de_Attributes = (ap->a_vap->va_mode & S_IWUSR) ?
151: ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY;
152: ndirent.de_StartCluster = 0;
153: ndirent.de_FileSize = 0;
154: ndirent.de_dev = pdep->de_dev;
155: ndirent.de_devvp = pdep->de_devvp;
156: ndirent.de_pmp = pdep->de_pmp;
157: ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
1.20 christos 158: DETIMES(&ndirent, NULL, NULL, NULL, pdep->de_pmp->pm_gmtoff);
1.1 jdolecek 159: if ((error = createde(&ndirent, pdep, &dep, cnp)) != 0)
160: goto bad;
161: if ((cnp->cn_flags & SAVESTART) == 0)
162: PNBUF_PUT(cnp->cn_pnbuf);
163: VN_KNOTE(ap->a_dvp, NOTE_WRITE);
164: vput(ap->a_dvp);
165: *ap->a_vpp = DETOV(dep);
166: return (0);
167:
168: bad:
169: PNBUF_PUT(cnp->cn_pnbuf);
170: vput(ap->a_dvp);
171: return (error);
172: }
173:
174: int
175: msdosfs_mknod(v)
176: void *v;
177: {
178: struct vop_mknod_args /* {
179: struct vnode *a_dvp;
180: struct vnode **a_vpp;
181: struct componentname *a_cnp;
182: struct vattr *a_vap;
183: } */ *ap = v;
184:
185: PNBUF_PUT(ap->a_cnp->cn_pnbuf);
186: vput(ap->a_dvp);
187: return (EINVAL);
188: }
189:
190: int
1.33 christos 191: msdosfs_open(void *v)
1.1 jdolecek 192: {
193: #if 0
194: struct vop_open_args /* {
195: struct vnode *a_vp;
196: int a_mode;
1.28 elad 197: kauth_cred_t a_cred;
1.1 jdolecek 198: } */ *ap;
199: #endif
200:
201: return (0);
202: }
203:
204: int
205: msdosfs_close(v)
206: void *v;
207: {
208: struct vop_close_args /* {
209: struct vnode *a_vp;
210: int a_fflag;
1.28 elad 211: kauth_cred_t a_cred;
1.1 jdolecek 212: } */ *ap = v;
213: struct vnode *vp = ap->a_vp;
214: struct denode *dep = VTODE(vp);
215:
1.46 ad 216: mutex_enter(&vp->v_interlock);
1.20 christos 217: if (vp->v_usecount > 1)
218: DETIMES(dep, NULL, NULL, NULL, dep->de_pmp->pm_gmtoff);
1.46 ad 219: mutex_exit(&vp->v_interlock);
1.1 jdolecek 220: return (0);
221: }
222:
223: int
224: msdosfs_access(v)
225: void *v;
226: {
227: struct vop_access_args /* {
228: struct vnode *a_vp;
229: int a_mode;
1.28 elad 230: kauth_cred_t a_cred;
1.1 jdolecek 231: } */ *ap = v;
232: struct vnode *vp = ap->a_vp;
233: struct denode *dep = VTODE(vp);
234: struct msdosfsmount *pmp = dep->de_pmp;
235: mode_t mode = ap->a_mode;
236:
237: /*
238: * Disallow write attempts on read-only file systems;
239: * unless the file is a socket, fifo, or a block or
240: * character device resident on the file system.
241: */
242: if (mode & VWRITE) {
243: switch (vp->v_type) {
244: case VDIR:
245: case VLNK:
246: case VREG:
247: if (vp->v_mount->mnt_flag & MNT_RDONLY)
248: return (EROFS);
249: default:
250: break;
251: }
252: }
253:
254: if ((dep->de_Attributes & ATTR_READONLY) == 0)
255: mode = S_IRWXU|S_IRWXG|S_IRWXO;
256: else
257: mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
1.6 jdolecek 258: return (vaccess(ap->a_vp->v_type,
259: mode & (vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask),
1.1 jdolecek 260: pmp->pm_uid, pmp->pm_gid, ap->a_mode, ap->a_cred));
261: }
262:
263: int
264: msdosfs_getattr(v)
265: void *v;
266: {
267: struct vop_getattr_args /* {
268: struct vnode *a_vp;
269: struct vattr *a_vap;
1.28 elad 270: kauth_cred_t a_cred;
1.1 jdolecek 271: } */ *ap = v;
272: struct denode *dep = VTODE(ap->a_vp);
273: struct msdosfsmount *pmp = dep->de_pmp;
274: struct vattr *vap = ap->a_vap;
275: mode_t mode;
276: u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
1.19 christos 277: ino_t fileid;
1.1 jdolecek 278:
1.20 christos 279: DETIMES(dep, NULL, NULL, NULL, pmp->pm_gmtoff);
1.1 jdolecek 280: vap->va_fsid = dep->de_dev;
281: /*
282: * The following computation of the fileid must be the same as that
283: * used in msdosfs_readdir() to compute d_fileno. If not, pwd
284: * doesn't work.
285: */
286: if (dep->de_Attributes & ATTR_DIRECTORY) {
1.19 christos 287: fileid = cntobn(pmp, (ino_t)dep->de_StartCluster) * dirsperblk;
1.1 jdolecek 288: if (dep->de_StartCluster == MSDOSFSROOT)
289: fileid = 1;
290: } else {
1.19 christos 291: fileid = cntobn(pmp, (ino_t)dep->de_dirclust) * dirsperblk;
1.1 jdolecek 292: if (dep->de_dirclust == MSDOSFSROOT)
293: fileid = roottobn(pmp, 0) * dirsperblk;
294: fileid += dep->de_diroffset / sizeof(struct direntry);
295: }
296: vap->va_fileid = fileid;
297: if ((dep->de_Attributes & ATTR_READONLY) == 0)
298: mode = S_IRWXU|S_IRWXG|S_IRWXO;
299: else
300: mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
1.6 jdolecek 301: vap->va_mode =
302: mode & (ap->a_vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask);
1.1 jdolecek 303: vap->va_uid = pmp->pm_uid;
304: vap->va_gid = pmp->pm_gid;
305: vap->va_nlink = 1;
306: vap->va_rdev = 0;
307: vap->va_size = ap->a_vp->v_size;
1.7 itojun 308: dos2unixtime(dep->de_MDate, dep->de_MTime, 0, pmp->pm_gmtoff,
309: &vap->va_mtime);
1.1 jdolecek 310: if (dep->de_pmp->pm_flags & MSDOSFSMNT_LONGNAME) {
1.7 itojun 311: dos2unixtime(dep->de_ADate, 0, 0, pmp->pm_gmtoff,
312: &vap->va_atime);
313: dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun,
314: pmp->pm_gmtoff, &vap->va_ctime);
1.1 jdolecek 315: } else {
316: vap->va_atime = vap->va_mtime;
317: vap->va_ctime = vap->va_mtime;
318: }
319: vap->va_flags = 0;
320: if ((dep->de_Attributes & ATTR_ARCHIVE) == 0)
321: vap->va_mode |= S_ARCH1;
322: vap->va_gen = 0;
323: vap->va_blocksize = pmp->pm_bpcluster;
324: vap->va_bytes =
325: (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask;
326: vap->va_type = ap->a_vp->v_type;
327: return (0);
328: }
329:
330: int
331: msdosfs_setattr(v)
332: void *v;
333: {
334: struct vop_setattr_args /* {
335: struct vnode *a_vp;
336: struct vattr *a_vap;
1.28 elad 337: kauth_cred_t a_cred;
1.1 jdolecek 338: } */ *ap = v;
339: int error = 0, de_changed = 0;
340: struct denode *dep = VTODE(ap->a_vp);
341: struct msdosfsmount *pmp = dep->de_pmp;
342: struct vnode *vp = ap->a_vp;
343: struct vattr *vap = ap->a_vap;
1.28 elad 344: kauth_cred_t cred = ap->a_cred;
1.1 jdolecek 345:
346: #ifdef MSDOSFS_DEBUG
347: printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n",
1.24 christos 348: ap->a_vp, vap, cred, ap->a_l);
1.1 jdolecek 349: #endif
350: /*
351: * Note we silently ignore uid or gid changes.
352: */
353: if ((vap->va_type != VNON) || (vap->va_nlink != (nlink_t)VNOVAL) ||
354: (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
355: (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) ||
356: (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL) ||
1.14 perry 357: (vap->va_uid != VNOVAL && vap->va_uid != pmp->pm_uid) ||
1.1 jdolecek 358: (vap->va_gid != VNOVAL && vap->va_gid != pmp->pm_gid)) {
359: #ifdef MSDOSFS_DEBUG
360: printf("msdosfs_setattr(): returning EINVAL\n");
1.16 christos 361: printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %llx\n",
362: vap->va_type, vap->va_nlink, vap->va_fsid,
363: (unsigned long long)vap->va_fileid);
1.1 jdolecek 364: printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n",
365: vap->va_blocksize, vap->va_rdev, (long long)vap->va_bytes, vap->va_gen);
366: #endif
367: return (EINVAL);
368: }
369: /*
370: * Silently ignore attributes modifications on directories.
371: */
372: if (ap->a_vp->v_type == VDIR)
373: return 0;
374:
375: if (vap->va_size != VNOVAL) {
376: if (vp->v_mount->mnt_flag & MNT_RDONLY)
377: return (EROFS);
1.44 pooka 378: error = detrunc(dep, (u_long)vap->va_size, 0, cred);
1.1 jdolecek 379: if (error)
380: return (error);
381: de_changed = 1;
382: }
383: if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
384: if (vp->v_mount->mnt_flag & MNT_RDONLY)
385: return (EROFS);
1.28 elad 386: if (kauth_cred_geteuid(cred) != pmp->pm_uid &&
387: (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER,
1.36 elad 388: NULL)) &&
1.1 jdolecek 389: ((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
1.44 pooka 390: (error = VOP_ACCESS(ap->a_vp, VWRITE, cred))))
1.1 jdolecek 391: return (error);
392: if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 &&
393: vap->va_atime.tv_sec != VNOVAL)
1.7 itojun 394: unix2dostime(&vap->va_atime, pmp->pm_gmtoff, &dep->de_ADate, NULL, NULL);
1.1 jdolecek 395: if (vap->va_mtime.tv_sec != VNOVAL)
1.7 itojun 396: unix2dostime(&vap->va_mtime, pmp->pm_gmtoff, &dep->de_MDate, &dep->de_MTime, NULL);
1.1 jdolecek 397: dep->de_Attributes |= ATTR_ARCHIVE;
398: dep->de_flag |= DE_MODIFIED;
399: de_changed = 1;
400: }
401: /*
402: * DOS files only have the ability to have their writability
403: * attribute set, so we use the owner write bit to set the readonly
404: * attribute.
405: */
406: if (vap->va_mode != (mode_t)VNOVAL) {
407: if (vp->v_mount->mnt_flag & MNT_RDONLY)
408: return (EROFS);
1.28 elad 409: if (kauth_cred_geteuid(cred) != pmp->pm_uid &&
410: (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER,
1.36 elad 411: NULL)))
1.1 jdolecek 412: return (error);
413: /* We ignore the read and execute bits. */
414: if (vap->va_mode & S_IWUSR)
415: dep->de_Attributes &= ~ATTR_READONLY;
416: else
417: dep->de_Attributes |= ATTR_READONLY;
418: dep->de_flag |= DE_MODIFIED;
419: de_changed = 1;
420: }
421: /*
422: * Allow the `archived' bit to be toggled.
423: */
424: if (vap->va_flags != VNOVAL) {
425: if (vp->v_mount->mnt_flag & MNT_RDONLY)
426: return (EROFS);
1.28 elad 427: if (kauth_cred_geteuid(cred) != pmp->pm_uid &&
428: (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER,
1.36 elad 429: NULL)))
1.1 jdolecek 430: return (error);
431: if (vap->va_flags & SF_ARCHIVED)
432: dep->de_Attributes &= ~ATTR_ARCHIVE;
433: else
434: dep->de_Attributes |= ATTR_ARCHIVE;
435: dep->de_flag |= DE_MODIFIED;
436: de_changed = 1;
437: }
438:
439: if (de_changed) {
440: VN_KNOTE(vp, NOTE_ATTRIB);
441: return (deupdat(dep, 1));
442: } else
443: return (0);
444: }
445:
446: int
447: msdosfs_read(v)
448: void *v;
449: {
450: struct vop_read_args /* {
451: struct vnode *a_vp;
452: struct uio *a_uio;
453: int a_ioflag;
1.28 elad 454: kauth_cred_t a_cred;
1.1 jdolecek 455: } */ *ap = v;
1.13 chs 456: int error = 0, flags;
1.1 jdolecek 457: int64_t diff;
458: int blsize;
459: long n;
460: long on;
461: daddr_t lbn;
462: void *win;
463: vsize_t bytelen;
464: struct buf *bp;
465: struct vnode *vp = ap->a_vp;
466: struct denode *dep = VTODE(vp);
467: struct msdosfsmount *pmp = dep->de_pmp;
468: struct uio *uio = ap->a_uio;
469:
470: /*
471: * If they didn't ask for any data, then we are done.
472: */
473:
474: if (uio->uio_resid == 0)
475: return (0);
476: if (uio->uio_offset < 0)
477: return (EINVAL);
478: if (uio->uio_offset >= dep->de_FileSize)
479: return (0);
480:
481: if (vp->v_type == VREG) {
1.23 yamt 482: const int advice = IO_ADV_DECODE(ap->a_ioflag);
483:
1.1 jdolecek 484: while (uio->uio_resid > 0) {
485: bytelen = MIN(dep->de_FileSize - uio->uio_offset,
486: uio->uio_resid);
487:
488: if (bytelen == 0)
489: break;
490: win = ubc_alloc(&vp->v_uobj, uio->uio_offset,
1.23 yamt 491: &bytelen, advice, UBC_READ);
1.1 jdolecek 492: error = uiomove(win, bytelen, uio);
1.13 chs 493: flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0;
494: ubc_release(win, flags);
1.1 jdolecek 495: if (error)
496: break;
497: }
498: dep->de_flag |= DE_ACCESS;
499: goto out;
500: }
501:
502: /* this loop is only for directories now */
503: do {
504: lbn = de_cluster(pmp, uio->uio_offset);
505: on = uio->uio_offset & pmp->pm_crbomask;
506: n = MIN(pmp->pm_bpcluster - on, uio->uio_resid);
507: if (uio->uio_offset >= dep->de_FileSize)
508: return (0);
509: /* file size (and hence diff) may be up to 4GB */
510: diff = dep->de_FileSize - uio->uio_offset;
511: if (diff < n)
512: n = (long) diff;
513:
1.34 scw 514: /* convert cluster # to sector # */
1.1 jdolecek 515: error = pcbmap(dep, lbn, &lbn, 0, &blsize);
516: if (error)
517: return (error);
518:
519: /*
520: * If we are operating on a directory file then be sure to
521: * do i/o with the vnode for the filesystem instead of the
522: * vnode for the directory.
523: */
1.34 scw 524: error = bread(pmp->pm_devvp, de_bn2kb(pmp, lbn), blsize,
525: NOCRED, &bp);
1.1 jdolecek 526: n = MIN(n, pmp->pm_bpcluster - bp->b_resid);
527: if (error) {
1.42 ad 528: brelse(bp, 0);
1.1 jdolecek 529: return (error);
530: }
1.38 christos 531: error = uiomove((char *)bp->b_data + on, (int) n, uio);
1.42 ad 532: brelse(bp, 0);
1.1 jdolecek 533: } while (error == 0 && uio->uio_resid > 0 && n != 0);
1.14 perry 534:
1.1 jdolecek 535: out:
536: if ((ap->a_ioflag & IO_SYNC) == IO_SYNC)
537: error = deupdat(dep, 1);
538: return (error);
539: }
540:
541: /*
542: * Write data to a file or directory.
543: */
544: int
545: msdosfs_write(v)
546: void *v;
547: {
548: struct vop_write_args /* {
549: struct vnode *a_vp;
550: struct uio *a_uio;
551: int a_ioflag;
1.28 elad 552: kauth_cred_t a_cred;
1.1 jdolecek 553: } */ *ap = v;
1.13 chs 554: int resid, flags, extended = 0;
555: int error = 0;
556: int ioflag = ap->a_ioflag;
1.1 jdolecek 557: u_long osize;
558: u_long count;
559: void *win;
560: vsize_t bytelen;
561: off_t oldoff;
562: struct uio *uio = ap->a_uio;
1.26 yamt 563: struct proc *p = curproc;
1.1 jdolecek 564: struct vnode *vp = ap->a_vp;
565: struct denode *dep = VTODE(vp);
566: struct msdosfsmount *pmp = dep->de_pmp;
1.28 elad 567: kauth_cred_t cred = ap->a_cred;
1.37 thorpej 568: bool async;
1.1 jdolecek 569:
570: #ifdef MSDOSFS_DEBUG
571: printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n",
572: vp, uio, ioflag, cred);
573: printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n",
574: dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster);
575: #endif
576:
577: switch (vp->v_type) {
578: case VREG:
579: if (ioflag & IO_APPEND)
580: uio->uio_offset = dep->de_FileSize;
581: break;
582: case VDIR:
583: return EISDIR;
584: default:
585: panic("msdosfs_write(): bad file type");
586: }
587:
588: if (uio->uio_offset < 0)
589: return (EINVAL);
590:
591: if (uio->uio_resid == 0)
592: return (0);
593:
1.17 xtraeme 594: /* Don't bother to try to write files larger than the fs limit */
595: if (uio->uio_offset + uio->uio_resid > MSDOSFS_FILESIZE_MAX)
596: return (EFBIG);
597:
1.1 jdolecek 598: /*
599: * If they've exceeded their filesize limit, tell them about it.
600: */
1.26 yamt 601: if (((uio->uio_offset + uio->uio_resid) >
1.1 jdolecek 602: p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) {
1.39 yamt 603: mutex_enter(&proclist_mutex);
1.1 jdolecek 604: psignal(p, SIGXFSZ);
1.39 yamt 605: mutex_exit(&proclist_mutex);
1.1 jdolecek 606: return (EFBIG);
607: }
608:
609: /*
610: * If the offset we are starting the write at is beyond the end of
611: * the file, then they've done a seek. Unix filesystems allow
612: * files with holes in them, DOS doesn't so we must fill the hole
613: * with zeroed blocks.
614: */
615: if (uio->uio_offset > dep->de_FileSize) {
616: if ((error = deextend(dep, uio->uio_offset, cred)) != 0)
617: return (error);
618: }
619:
620: /*
621: * Remember some values in case the write fails.
622: */
623: async = vp->v_mount->mnt_flag & MNT_ASYNC;
624: resid = uio->uio_resid;
625: osize = dep->de_FileSize;
626:
627: /*
628: * If we write beyond the end of the file, extend it to its ultimate
629: * size ahead of the time to hopefully get a contiguous area.
630: */
631: if (uio->uio_offset + resid > osize) {
632: count = de_clcount(pmp, uio->uio_offset + resid) -
633: de_clcount(pmp, osize);
634: if ((error = extendfile(dep, count, NULL, NULL, 0)) &&
635: (error != ENOSPC || (ioflag & IO_UNIT)))
636: goto errexit;
637:
638: dep->de_FileSize = uio->uio_offset + resid;
1.45 reinoud 639: /* hint uvm to not read in extended part */
640: uvm_vnp_setwritesize(vp, dep->de_FileSize);
1.1 jdolecek 641: extended = 1;
642: }
643:
644: do {
645: oldoff = uio->uio_offset;
646: bytelen = uio->uio_resid;
647:
1.23 yamt 648: win = ubc_alloc(&vp->v_uobj, oldoff, &bytelen, UVM_ADV_NORMAL,
649: UBC_WRITE);
1.1 jdolecek 650: error = uiomove(win, bytelen, uio);
1.13 chs 651: flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0;
652: ubc_release(win, flags);
1.34 scw 653: if (error)
1.1 jdolecek 654: break;
655:
656: /*
657: * flush what we just wrote if necessary.
658: * XXXUBC simplistic async flushing.
659: */
660:
661: if (!async && oldoff >> 16 != uio->uio_offset >> 16) {
1.46 ad 662: mutex_enter(&vp->v_interlock);
1.1 jdolecek 663: error = VOP_PUTPAGES(vp, (oldoff >> 16) << 16,
664: (uio->uio_offset >> 16) << 16, PGO_CLEANIT);
665: }
666: } while (error == 0 && uio->uio_resid > 0);
1.45 reinoud 667:
668: /* set final size */
669: uvm_vnp_setsize(vp, dep->de_FileSize);
1.1 jdolecek 670: if (error == 0 && ioflag & IO_SYNC) {
1.46 ad 671: mutex_enter(&vp->v_interlock);
1.1 jdolecek 672: error = VOP_PUTPAGES(vp, trunc_page(oldoff),
673: round_page(oldoff + bytelen), PGO_CLEANIT | PGO_SYNCIO);
674: }
675: dep->de_flag |= DE_UPDATE;
676:
677: /*
678: * If the write failed and they want us to, truncate the file back
679: * to the size it was before the write was attempted.
680: */
681: errexit:
682: if (resid > uio->uio_resid)
683: VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0));
684: if (error) {
1.44 pooka 685: detrunc(dep, osize, ioflag & IO_SYNC, NOCRED);
1.1 jdolecek 686: uio->uio_offset -= resid - uio->uio_resid;
687: uio->uio_resid = resid;
688: } else if ((ioflag & IO_SYNC) == IO_SYNC)
689: error = deupdat(dep, 1);
690: KASSERT(vp->v_size == dep->de_FileSize);
691: return (error);
692: }
693:
694: int
1.21 yamt 695: msdosfs_update(struct vnode *vp, const struct timespec *acc,
696: const struct timespec *mod, int flags)
1.1 jdolecek 697: {
698: struct buf *bp;
699: struct direntry *dirp;
700: struct denode *dep;
701: int error;
702:
1.21 yamt 703: if (vp->v_mount->mnt_flag & MNT_RDONLY)
1.1 jdolecek 704: return (0);
1.21 yamt 705: dep = VTODE(vp);
706: DETIMES(dep, acc, mod, NULL, dep->de_pmp->pm_gmtoff);
1.1 jdolecek 707: if ((dep->de_flag & DE_MODIFIED) == 0)
708: return (0);
709: dep->de_flag &= ~DE_MODIFIED;
710: if (dep->de_Attributes & ATTR_DIRECTORY)
711: return (0);
712: if (dep->de_refcnt <= 0)
713: return (0);
714: error = readde(dep, &bp, &dirp);
715: if (error)
716: return (error);
717: DE_EXTERNALIZE(dirp, dep);
1.21 yamt 718: if (flags & (UPDATE_WAIT|UPDATE_DIROP))
1.1 jdolecek 719: return (bwrite(bp));
720: else {
721: bdwrite(bp);
722: return (0);
723: }
724: }
725:
726: /*
727: * Flush the blocks of a file to disk.
728: *
729: * This function is worthless for vnodes that represent directories. Maybe we
730: * could just do a sync if they try an fsync on a directory file.
731: */
732: int
733: msdosfs_remove(v)
734: void *v;
735: {
736: struct vop_remove_args /* {
737: struct vnode *a_dvp;
738: struct vnode *a_vp;
739: struct componentname *a_cnp;
740: } */ *ap = v;
741: struct denode *dep = VTODE(ap->a_vp);
742: struct denode *ddep = VTODE(ap->a_dvp);
743: int error;
744:
745: if (ap->a_vp->v_type == VDIR)
746: error = EPERM;
747: else
748: error = removede(ddep, dep);
749: #ifdef MSDOSFS_DEBUG
750: printf("msdosfs_remove(), dep %p, v_usecount %d\n",
751: dep, ap->a_vp->v_usecount);
752: #endif
753: VN_KNOTE(ap->a_vp, NOTE_DELETE);
754: VN_KNOTE(ap->a_dvp, NOTE_WRITE);
755: if (ddep == dep)
756: vrele(ap->a_vp);
757: else
758: vput(ap->a_vp); /* causes msdosfs_inactive() to be called
759: * via vrele() */
760: vput(ap->a_dvp);
761: return (error);
762: }
763:
764: /*
765: * DOS filesystems don't know what links are. But since we already called
766: * msdosfs_lookup() with create and lockparent, the parent is locked so we
767: * have to free it before we return the error.
768: */
769: int
770: msdosfs_link(v)
771: void *v;
772: {
773: struct vop_link_args /* {
774: struct vnode *a_dvp;
775: struct vnode *a_vp;
776: struct componentname *a_cnp;
777: } */ *ap = v;
778:
779: VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
780: vput(ap->a_dvp);
781: return (EOPNOTSUPP);
782: }
783:
784: /*
785: * Renames on files require moving the denode to a new hash queue since the
786: * denode's location is used to compute which hash queue to put the file
787: * in. Unless it is a rename in place. For example "mv a b".
788: *
789: * What follows is the basic algorithm:
790: *
791: * if (file move) {
792: * if (dest file exists) {
793: * remove dest file
794: * }
795: * if (dest and src in same directory) {
796: * rewrite name in existing directory slot
797: * } else {
798: * write new entry in dest directory
799: * update offset and dirclust in denode
800: * move denode to new hash chain
801: * clear old directory entry
802: * }
803: * } else {
804: * directory move
805: * if (dest directory exists) {
806: * if (dest is not empty) {
807: * return ENOTEMPTY
808: * }
809: * remove dest directory
810: * }
811: * if (dest and src in same directory) {
812: * rewrite name in existing entry
813: * } else {
814: * be sure dest is not a child of src directory
815: * write entry in dest directory
816: * update "." and ".." in moved directory
817: * update offset and dirclust in denode
818: * move denode to new hash chain
819: * clear old directory entry for moved directory
820: * }
821: * }
822: *
823: * On entry:
824: * source's parent directory is unlocked
825: * source file or directory is unlocked
826: * destination's parent directory is locked
827: * destination file or directory is locked if it exists
828: *
829: * On exit:
830: * all denodes should be released
831: *
832: * Notes:
833: * I'm not sure how the memory containing the pathnames pointed at by the
834: * componentname structures is freed, there may be some memory bleeding
835: * for each rename done.
1.43 pooka 836: *
837: * --More-- Notes:
838: * This routine needs help. badly.
1.1 jdolecek 839: */
840: int
841: msdosfs_rename(v)
842: void *v;
843: {
844: struct vop_rename_args /* {
845: struct vnode *a_fdvp;
846: struct vnode *a_fvp;
847: struct componentname *a_fcnp;
848: struct vnode *a_tdvp;
849: struct vnode *a_tvp;
850: struct componentname *a_tcnp;
851: } */ *ap = v;
852: struct vnode *tvp = ap->a_tvp;
853: struct vnode *tdvp = ap->a_tdvp;
854: struct vnode *fvp = ap->a_fvp;
855: struct vnode *fdvp = ap->a_fdvp;
856: struct componentname *tcnp = ap->a_tcnp;
857: struct componentname *fcnp = ap->a_fcnp;
858: struct denode *ip, *xp, *dp, *zp;
859: u_char toname[11], oldname[11];
860: u_long from_diroffset, to_diroffset;
861: u_char to_count;
862: int doingdirectory = 0, newparent = 0;
863: int error;
864: u_long cn;
865: daddr_t bn;
866: struct msdosfsmount *pmp;
867: struct direntry *dotdotp;
868: struct buf *bp;
869: int fdvp_dorele = 0;
870:
871: pmp = VFSTOMSDOSFS(fdvp->v_mount);
872:
873: #ifdef DIAGNOSTIC
874: if ((tcnp->cn_flags & HASBUF) == 0 ||
875: (fcnp->cn_flags & HASBUF) == 0)
876: panic("msdosfs_rename: no name");
877: #endif
878: /*
879: * Check for cross-device rename.
880: */
881: if ((fvp->v_mount != tdvp->v_mount) ||
882: (tvp && (fvp->v_mount != tvp->v_mount))) {
883: error = EXDEV;
884: abortit:
885: VOP_ABORTOP(tdvp, tcnp);
886: if (tdvp == tvp)
887: vrele(tdvp);
888: else
889: vput(tdvp);
890: if (tvp)
891: vput(tvp);
892: VOP_ABORTOP(fdvp, fcnp);
893: vrele(fdvp);
894: vrele(fvp);
895: return (error);
896: }
897:
898: /*
899: * If source and dest are the same, do nothing.
900: */
901: if (tvp == fvp) {
902: error = 0;
903: goto abortit;
904: }
905:
1.43 pooka 906: /*
907: * XXX: This can deadlock since we hold tdvp/tvp locked.
908: * But I'm not going to fix it now. If lockmgr detected the
909: * deadlock, this might actually work... sorta.
910: */
1.1 jdolecek 911: if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0)
912: goto abortit;
913: dp = VTODE(fdvp);
914: ip = VTODE(fvp);
915:
916: /*
917: * Be sure we are not renaming ".", "..", or an alias of ".". This
918: * leads to a crippled directory tree. It's pretty tough to do a
919: * "ls" or "pwd" with the "." directory entry missing, and "cd .."
920: * doesn't work if the ".." entry is missing.
921: */
922: if (ip->de_Attributes & ATTR_DIRECTORY) {
923: /*
924: * Avoid ".", "..", and aliases of "." for obvious reasons.
925: */
926: if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
927: dp == ip ||
928: (fcnp->cn_flags & ISDOTDOT) ||
929: (tcnp->cn_flags & ISDOTDOT) ||
930: (ip->de_flag & DE_RENAME)) {
931: VOP_UNLOCK(fvp, 0);
932: error = EINVAL;
933: goto abortit;
934: }
935: ip->de_flag |= DE_RENAME;
936: doingdirectory++;
937: }
938: VN_KNOTE(fdvp, NOTE_WRITE); /* XXXLUKEM/XXX: right place? */
939:
940: /*
941: * When the target exists, both the directory
942: * and target vnodes are returned locked.
943: */
944: dp = VTODE(tdvp);
945: xp = tvp ? VTODE(tvp) : NULL;
946: /*
947: * Remember direntry place to use for destination
948: */
949: to_diroffset = dp->de_fndoffset;
950: to_count = dp->de_fndcnt;
951:
952: /*
953: * If ".." must be changed (ie the directory gets a new
954: * parent) then the source directory must not be in the
955: * directory hierarchy above the target, as this would
956: * orphan everything below the source directory. Also
957: * the user must have write permission in the source so
958: * as to be able to change "..". We must repeat the call
959: * to namei, as the parent directory is unlocked by the
960: * call to doscheckpath().
961: */
1.44 pooka 962: error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred);
1.1 jdolecek 963: VOP_UNLOCK(fvp, 0);
964: if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster)
965: newparent = 1;
1.43 pooka 966:
967: /*
968: * XXX: We can do this here because rename uses SAVEFART and
969: * therefore fdvp has at least two references (one doesn't
970: * belong to us, though, and that's evil). We'll get
971: * another "extra" reference when we do relookup(), so we
972: * need to compensate. We should *NOT* be doing this, but
973: * it works, so whatever.
974: */
1.1 jdolecek 975: vrele(fdvp);
1.43 pooka 976:
1.1 jdolecek 977: if (doingdirectory && newparent) {
978: if (error) /* write access check above */
1.43 pooka 979: goto tdvpbad;
1.1 jdolecek 980: if (xp != NULL)
981: vput(tvp);
1.43 pooka 982: tvp = NULL;
1.1 jdolecek 983: /*
984: * doscheckpath() vput()'s dp,
985: * so we have to do a relookup afterwards
986: */
987: if ((error = doscheckpath(ip, dp)) != 0)
988: goto out;
989: if ((tcnp->cn_flags & SAVESTART) == 0)
990: panic("msdosfs_rename: lost to startdir");
1.43 pooka 991: vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY);
992: if ((error = relookup(tdvp, &tvp, tcnp)) != 0) {
993: VOP_UNLOCK(tdvp, 0);
1.1 jdolecek 994: goto out;
1.43 pooka 995: }
996: /*
997: * XXX: SAVESTART causes us to get a reference, but
998: * that's released already above in doscheckpath()
999: */
1.1 jdolecek 1000: dp = VTODE(tdvp);
1001: xp = tvp ? VTODE(tvp) : NULL;
1002: }
1003:
1004: if (xp != NULL) {
1005: /*
1006: * Target must be empty if a directory and have no links
1007: * to it. Also, ensure source and target are compatible
1008: * (both directories, or both not directories).
1009: */
1010: if (xp->de_Attributes & ATTR_DIRECTORY) {
1011: if (!dosdirempty(xp)) {
1012: error = ENOTEMPTY;
1.43 pooka 1013: goto tdvpbad;
1.1 jdolecek 1014: }
1015: if (!doingdirectory) {
1016: error = ENOTDIR;
1.43 pooka 1017: goto tdvpbad;
1.1 jdolecek 1018: }
1019: } else if (doingdirectory) {
1020: error = EISDIR;
1.43 pooka 1021: goto tdvpbad;
1.1 jdolecek 1022: }
1023: if ((error = removede(dp, xp)) != 0)
1.43 pooka 1024: goto tdvpbad;
1.1 jdolecek 1025: VN_KNOTE(tdvp, NOTE_WRITE);
1026: VN_KNOTE(tvp, NOTE_DELETE);
1027: cache_purge(tvp);
1028: vput(tvp);
1.43 pooka 1029: tvp = NULL;
1.1 jdolecek 1030: xp = NULL;
1031: }
1032:
1033: /*
1034: * Convert the filename in tcnp into a dos filename. We copy this
1035: * into the denode and directory entry for the destination
1036: * file/directory.
1037: */
1038: if ((error = uniqdosname(VTODE(tdvp), tcnp, toname)) != 0)
1039: goto abortit;
1040:
1041: /*
1042: * Since from wasn't locked at various places above,
1043: * have to do a relookup here.
1044: */
1045: fcnp->cn_flags &= ~MODMASK;
1046: fcnp->cn_flags |= LOCKPARENT | LOCKLEAF;
1047: if ((fcnp->cn_flags & SAVESTART) == 0)
1048: panic("msdosfs_rename: lost from startdir");
1.43 pooka 1049: VOP_UNLOCK(tdvp, 0);
1.35 chs 1050: vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY);
1051: if ((error = relookup(fdvp, &fvp, fcnp))) {
1.43 pooka 1052: VOP_UNLOCK(fdvp, 0);
1.35 chs 1053: vrele(ap->a_fvp);
1054: vrele(tdvp);
1055: return (error);
1056: }
1.1 jdolecek 1057: if (fvp == NULL) {
1058: /*
1059: * From name has disappeared.
1060: */
1061: if (doingdirectory)
1062: panic("rename: lost dir entry");
1.35 chs 1063: vput(fdvp);
1.1 jdolecek 1064: vrele(ap->a_fvp);
1065: vrele(tdvp);
1066: return 0;
1067: }
1068: fdvp_dorele = 1;
1.43 pooka 1069: VOP_UNLOCK(fdvp, 0);
1.1 jdolecek 1070: xp = VTODE(fvp);
1071: zp = VTODE(fdvp);
1072: from_diroffset = zp->de_fndoffset;
1073:
1074: /*
1075: * Ensure that the directory entry still exists and has not
1076: * changed till now. If the source is a file the entry may
1077: * have been unlinked or renamed. In either case there is
1078: * no further work to be done. If the source is a directory
1079: * then it cannot have been rmdir'ed or renamed; this is
1080: * prohibited by the DE_RENAME flag.
1081: */
1082: if (xp != ip) {
1083: if (doingdirectory)
1084: panic("rename: lost dir entry");
1085: vrele(ap->a_fvp);
1086: VOP_UNLOCK(fvp, 0);
1087: xp = NULL;
1088: } else {
1089: vrele(fvp);
1090: xp = NULL;
1091:
1092: /*
1093: * First write a new entry in the destination
1094: * directory and mark the entry in the source directory
1095: * as deleted. Then move the denode to the correct hash
1096: * chain for its new location in the filesystem. And, if
1097: * we moved a directory, then update its .. entry to point
1098: * to the new parent directory.
1099: */
1100: memcpy(oldname, ip->de_Name, 11);
1101: memcpy(ip->de_Name, toname, 11); /* update denode */
1102: dp->de_fndoffset = to_diroffset;
1103: dp->de_fndcnt = to_count;
1104: error = createde(ip, dp, (struct denode **)0, tcnp);
1105: if (error) {
1106: memcpy(ip->de_Name, oldname, 11);
1107: VOP_UNLOCK(fvp, 0);
1108: goto bad;
1109: }
1110: ip->de_refcnt++;
1111: zp->de_fndoffset = from_diroffset;
1112: if ((error = removede(zp, ip)) != 0) {
1113: /* XXX should really panic here, fs is corrupt */
1114: VOP_UNLOCK(fvp, 0);
1115: goto bad;
1116: }
1117: cache_purge(fvp);
1118: if (!doingdirectory) {
1119: error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0,
1120: &ip->de_dirclust, 0);
1121: if (error) {
1122: /* XXX should really panic here, fs is corrupt */
1123: VOP_UNLOCK(fvp, 0);
1124: goto bad;
1125: }
1126: ip->de_diroffset = to_diroffset;
1127: if (ip->de_dirclust != MSDOSFSROOT)
1128: ip->de_diroffset &= pmp->pm_crbomask;
1129: }
1130: reinsert(ip);
1131: }
1132:
1133: /*
1134: * If we moved a directory to a new parent directory, then we must
1135: * fixup the ".." entry in the moved directory.
1136: */
1137: if (doingdirectory && newparent) {
1138: cn = ip->de_StartCluster;
1139: if (cn == MSDOSFSROOT) {
1140: /* this should never happen */
1141: panic("msdosfs_rename: updating .. in root directory?");
1142: } else
1143: bn = cntobn(pmp, cn);
1.34 scw 1144: error = bread(pmp->pm_devvp, de_bn2kb(pmp, bn),
1145: pmp->pm_bpcluster, NOCRED, &bp);
1.1 jdolecek 1146: if (error) {
1147: /* XXX should really panic here, fs is corrupt */
1.42 ad 1148: brelse(bp, 0);
1.1 jdolecek 1149: VOP_UNLOCK(fvp, 0);
1150: goto bad;
1151: }
1152: dotdotp = (struct direntry *)bp->b_data + 1;
1153: putushort(dotdotp->deStartCluster, dp->de_StartCluster);
1154: if (FAT32(pmp)) {
1155: putushort(dotdotp->deHighClust,
1156: dp->de_StartCluster >> 16);
1.22 christos 1157: } else {
1158: putushort(dotdotp->deHighClust, 0);
1.1 jdolecek 1159: }
1160: if ((error = bwrite(bp)) != 0) {
1161: /* XXX should really panic here, fs is corrupt */
1162: VOP_UNLOCK(fvp, 0);
1163: goto bad;
1164: }
1165: }
1166:
1167: VN_KNOTE(fvp, NOTE_RENAME);
1168: VOP_UNLOCK(fvp, 0);
1169: bad:
1.43 pooka 1170: if (tvp)
1.1 jdolecek 1171: vput(tvp);
1.43 pooka 1172: vrele(tdvp);
1.1 jdolecek 1173: out:
1174: ip->de_flag &= ~DE_RENAME;
1175: if (fdvp_dorele)
1176: vrele(fdvp);
1177: vrele(fvp);
1178: return (error);
1179:
1.43 pooka 1180: /* XXX: uuuh */
1181: tdvpbad:
1182: VOP_UNLOCK(tdvp, 0);
1183: goto bad;
1.1 jdolecek 1184: }
1185:
1.2 jdolecek 1186: static const struct {
1.1 jdolecek 1187: struct direntry dot;
1188: struct direntry dotdot;
1189: } dosdirtemplate = {
1190: { ". ", " ", /* the . entry */
1191: ATTR_DIRECTORY, /* file attribute */
1192: 0, /* reserved */
1193: 0, { 0, 0 }, { 0, 0 }, /* create time & date */
1194: { 0, 0 }, /* access date */
1195: { 0, 0 }, /* high bits of start cluster */
1196: { 210, 4 }, { 210, 4 }, /* modify time & date */
1197: { 0, 0 }, /* startcluster */
1198: { 0, 0, 0, 0 } /* filesize */
1199: },
1200: { ".. ", " ", /* the .. entry */
1201: ATTR_DIRECTORY, /* file attribute */
1202: 0, /* reserved */
1203: 0, { 0, 0 }, { 0, 0 }, /* create time & date */
1204: { 0, 0 }, /* access date */
1205: { 0, 0 }, /* high bits of start cluster */
1206: { 210, 4 }, { 210, 4 }, /* modify time & date */
1207: { 0, 0 }, /* startcluster */
1208: { 0, 0, 0, 0 } /* filesize */
1209: }
1210: };
1211:
1212: int
1213: msdosfs_mkdir(v)
1214: void *v;
1215: {
1216: struct vop_mkdir_args /* {
1217: struct vnode *a_dvp;
1218: struvt vnode **a_vpp;
1219: struvt componentname *a_cnp;
1220: struct vattr *a_vap;
1221: } */ *ap = v;
1222: struct componentname *cnp = ap->a_cnp;
1223: struct denode ndirent;
1224: struct denode *dep;
1225: struct denode *pdep = VTODE(ap->a_dvp);
1226: int error;
1227: int bn;
1228: u_long newcluster, pcl;
1229: struct direntry *denp;
1230: struct msdosfsmount *pmp = pdep->de_pmp;
1231: struct buf *bp;
1232: int async = pdep->de_pmp->pm_mountp->mnt_flag & MNT_ASYNC;
1233:
1234: /*
1235: * If this is the root directory and there is no space left we
1236: * can't do anything. This is because the root directory can not
1237: * change size.
1238: */
1239: if (pdep->de_StartCluster == MSDOSFSROOT
1240: && pdep->de_fndoffset >= pdep->de_FileSize) {
1241: error = ENOSPC;
1242: goto bad2;
1243: }
1244:
1245: /*
1246: * Allocate a cluster to hold the about to be created directory.
1247: */
1248: error = clusteralloc(pmp, 0, 1, &newcluster, NULL);
1249: if (error)
1250: goto bad2;
1251:
1252: memset(&ndirent, 0, sizeof(ndirent));
1253: ndirent.de_pmp = pmp;
1254: ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
1.20 christos 1255: DETIMES(&ndirent, NULL, NULL, NULL, pmp->pm_gmtoff);
1.1 jdolecek 1256:
1257: /*
1258: * Now fill the cluster with the "." and ".." entries. And write
1259: * the cluster to disk. This way it is there for the parent
1260: * directory to be pointing at if there were a crash.
1261: */
1262: bn = cntobn(pmp, newcluster);
1263: /* always succeeds */
1.34 scw 1264: bp = getblk(pmp->pm_devvp, de_bn2kb(pmp, bn), pmp->pm_bpcluster, 0, 0);
1.1 jdolecek 1265: memset(bp->b_data, 0, pmp->pm_bpcluster);
1266: memcpy(bp->b_data, &dosdirtemplate, sizeof dosdirtemplate);
1267: denp = (struct direntry *)bp->b_data;
1268: putushort(denp[0].deStartCluster, newcluster);
1269: putushort(denp[0].deCDate, ndirent.de_CDate);
1270: putushort(denp[0].deCTime, ndirent.de_CTime);
1271: denp[0].deCHundredth = ndirent.de_CHun;
1272: putushort(denp[0].deADate, ndirent.de_ADate);
1273: putushort(denp[0].deMDate, ndirent.de_MDate);
1274: putushort(denp[0].deMTime, ndirent.de_MTime);
1275: pcl = pdep->de_StartCluster;
1276: if (FAT32(pmp) && pcl == pmp->pm_rootdirblk)
1277: pcl = 0;
1278: putushort(denp[1].deStartCluster, pcl);
1279: putushort(denp[1].deCDate, ndirent.de_CDate);
1280: putushort(denp[1].deCTime, ndirent.de_CTime);
1281: denp[1].deCHundredth = ndirent.de_CHun;
1282: putushort(denp[1].deADate, ndirent.de_ADate);
1283: putushort(denp[1].deMDate, ndirent.de_MDate);
1284: putushort(denp[1].deMTime, ndirent.de_MTime);
1285: if (FAT32(pmp)) {
1286: putushort(denp[0].deHighClust, newcluster >> 16);
1287: putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16);
1.22 christos 1288: } else {
1289: putushort(denp[0].deHighClust, 0);
1290: putushort(denp[1].deHighClust, 0);
1.1 jdolecek 1291: }
1292:
1293: if (async)
1294: bdwrite(bp);
1295: else if ((error = bwrite(bp)) != 0)
1296: goto bad;
1297:
1298: /*
1299: * Now build up a directory entry pointing to the newly allocated
1300: * cluster. This will be written to an empty slot in the parent
1301: * directory.
1302: */
1303: #ifdef DIAGNOSTIC
1304: if ((cnp->cn_flags & HASBUF) == 0)
1305: panic("msdosfs_mkdir: no name");
1306: #endif
1307: if ((error = uniqdosname(pdep, cnp, ndirent.de_Name)) != 0)
1308: goto bad;
1309:
1310: ndirent.de_Attributes = ATTR_DIRECTORY;
1311: ndirent.de_StartCluster = newcluster;
1312: ndirent.de_FileSize = 0;
1313: ndirent.de_dev = pdep->de_dev;
1314: ndirent.de_devvp = pdep->de_devvp;
1315: if ((error = createde(&ndirent, pdep, &dep, cnp)) != 0)
1316: goto bad;
1317: if ((cnp->cn_flags & SAVESTART) == 0)
1318: PNBUF_PUT(cnp->cn_pnbuf);
1319: VN_KNOTE(ap->a_dvp, NOTE_WRITE | NOTE_LINK);
1320: vput(ap->a_dvp);
1321: *ap->a_vpp = DETOV(dep);
1322: return (0);
1323:
1324: bad:
1325: clusterfree(pmp, newcluster, NULL);
1326: bad2:
1327: PNBUF_PUT(cnp->cn_pnbuf);
1328: vput(ap->a_dvp);
1329: return (error);
1330: }
1331:
1332: int
1333: msdosfs_rmdir(v)
1334: void *v;
1335: {
1336: struct vop_rmdir_args /* {
1337: struct vnode *a_dvp;
1338: struct vnode *a_vp;
1339: struct componentname *a_cnp;
1340: } */ *ap = v;
1341: struct vnode *vp = ap->a_vp;
1342: struct vnode *dvp = ap->a_dvp;
1343: struct componentname *cnp = ap->a_cnp;
1344: struct denode *ip, *dp;
1345: int error;
1346:
1347: ip = VTODE(vp);
1348: dp = VTODE(dvp);
1349: /*
1350: * No rmdir "." please.
1351: */
1352: if (dp == ip) {
1353: vrele(dvp);
1354: vput(vp);
1355: return (EINVAL);
1356: }
1357: /*
1358: * Verify the directory is empty (and valid).
1359: * (Rmdir ".." won't be valid since
1360: * ".." will contain a reference to
1361: * the current directory and thus be
1362: * non-empty.)
1363: */
1364: error = 0;
1365: if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) {
1366: error = ENOTEMPTY;
1367: goto out;
1368: }
1369: /*
1370: * Delete the entry from the directory. For dos filesystems this
1371: * gets rid of the directory entry on disk, the in memory copy
1372: * still exists but the de_refcnt is <= 0. This prevents it from
1373: * being found by deget(). When the vput() on dep is done we give
1374: * up access and eventually msdosfs_reclaim() will be called which
1375: * will remove it from the denode cache.
1376: */
1377: if ((error = removede(dp, ip)) != 0)
1378: goto out;
1379: /*
1380: * This is where we decrement the link count in the parent
1381: * directory. Since dos filesystems don't do this we just purge
1382: * the name cache and let go of the parent directory denode.
1383: */
1384: VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK);
1385: cache_purge(dvp);
1386: vput(dvp);
1387: dvp = NULL;
1388: /*
1389: * Truncate the directory that is being deleted.
1390: */
1.44 pooka 1391: error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred);
1.1 jdolecek 1392: cache_purge(vp);
1393: out:
1394: VN_KNOTE(vp, NOTE_DELETE);
1395: if (dvp)
1396: vput(dvp);
1397: vput(vp);
1398: return (error);
1399: }
1400:
1401: /*
1402: * DOS filesystems don't know what symlinks are.
1403: */
1404: int
1405: msdosfs_symlink(v)
1406: void *v;
1407: {
1408: struct vop_symlink_args /* {
1409: struct vnode *a_dvp;
1410: struct vnode **a_vpp;
1411: struct componentname *a_cnp;
1412: struct vattr *a_vap;
1413: char *a_target;
1414: } */ *ap = v;
1415:
1416: VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
1417: vput(ap->a_dvp);
1418: return (EOPNOTSUPP);
1419: }
1420:
1421: int
1422: msdosfs_readdir(v)
1423: void *v;
1424: {
1425: struct vop_readdir_args /* {
1426: struct vnode *a_vp;
1427: struct uio *a_uio;
1.28 elad 1428: kauth_cred_t a_cred;
1.1 jdolecek 1429: int *a_eofflag;
1430: off_t **a_cookies;
1431: int *a_ncookies;
1432: } */ *ap = v;
1433: int error = 0;
1434: int diff;
1435: long n;
1436: int blsize;
1437: long on;
1438: long lost;
1439: long count;
1440: u_long cn;
1.19 christos 1441: ino_t fileno;
1.1 jdolecek 1442: u_long dirsperblk;
1443: long bias = 0;
1444: daddr_t bn, lbn;
1445: struct buf *bp;
1446: struct denode *dep = VTODE(ap->a_vp);
1447: struct msdosfsmount *pmp = dep->de_pmp;
1448: struct direntry *dentp;
1.41 rumble 1449: struct dirent *dirbuf;
1.1 jdolecek 1450: struct uio *uio = ap->a_uio;
1451: off_t *cookies = NULL;
1452: int ncookies = 0, nc = 0;
1453: off_t offset, uio_off;
1454: int chksum = -1;
1455:
1456: #ifdef MSDOSFS_DEBUG
1457: printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n",
1458: ap->a_vp, uio, ap->a_cred, ap->a_eofflag);
1459: #endif
1460:
1461: /*
1462: * msdosfs_readdir() won't operate properly on regular files since
1463: * it does i/o only with the filesystem vnode, and hence can
1464: * retrieve the wrong block from the buffer cache for a plain file.
1465: * So, fail attempts to readdir() on a plain file.
1466: */
1467: if ((dep->de_Attributes & ATTR_DIRECTORY) == 0)
1468: return (ENOTDIR);
1469:
1470: /*
1471: * If the user buffer is smaller than the size of one dos directory
1472: * entry or the file offset is not a multiple of the size of a
1473: * directory entry, then we fail the read.
1474: */
1475: count = uio->uio_resid & ~(sizeof(struct direntry) - 1);
1476: offset = uio->uio_offset;
1477: if (count < sizeof(struct direntry) ||
1478: (offset & (sizeof(struct direntry) - 1)))
1479: return (EINVAL);
1480: lost = uio->uio_resid - count;
1481: uio->uio_resid = count;
1482: uio_off = uio->uio_offset;
1.41 rumble 1483:
1484: /* Allocate a temporary dirent buffer. */
1485: dirbuf = malloc(sizeof(struct dirent), M_MSDOSFSTMP, M_WAITOK | M_ZERO);
1.1 jdolecek 1486:
1487: if (ap->a_ncookies) {
1.40 rumble 1488: nc = uio->uio_resid / _DIRENT_MINSIZE((struct dirent *)0);
1.1 jdolecek 1489: cookies = malloc(nc * sizeof (off_t), M_TEMP, M_WAITOK);
1490: *ap->a_cookies = cookies;
1491: }
1492:
1493: dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
1494:
1495: /*
1496: * If they are reading from the root directory then, we simulate
1497: * the . and .. entries since these don't exist in the root
1498: * directory. We also set the offset bias to make up for having to
1499: * simulate these entries. By this I mean that at file offset 64 we
1500: * read the first entry in the root directory that lives on disk.
1501: */
1502: if (dep->de_StartCluster == MSDOSFSROOT
1503: || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) {
1504: #if 0
1.34 scw 1505: printf("msdosfs_readdir(): going after . or .. in root dir, "
1506: "offset %" PRIu64 "\n", offset);
1.1 jdolecek 1507: #endif
1508: bias = 2 * sizeof(struct direntry);
1509: if (offset < bias) {
1510: for (n = (int)offset / sizeof(struct direntry);
1511: n < 2; n++) {
1512: if (FAT32(pmp))
1.41 rumble 1513: dirbuf->d_fileno = cntobn(pmp,
1.19 christos 1514: (ino_t)pmp->pm_rootdirblk)
1515: * dirsperblk;
1.1 jdolecek 1516: else
1.41 rumble 1517: dirbuf->d_fileno = 1;
1518: dirbuf->d_type = DT_DIR;
1.1 jdolecek 1519: switch (n) {
1520: case 0:
1.41 rumble 1521: dirbuf->d_namlen = 1;
1522: strlcpy(dirbuf->d_name, ".",
1523: sizeof(dirbuf->d_name));
1.1 jdolecek 1524: break;
1525: case 1:
1.41 rumble 1526: dirbuf->d_namlen = 2;
1527: strlcpy(dirbuf->d_name, "..",
1528: sizeof(dirbuf->d_name));
1.1 jdolecek 1529: break;
1530: }
1.41 rumble 1531: dirbuf->d_reclen = _DIRENT_SIZE(dirbuf);
1532: if (uio->uio_resid < dirbuf->d_reclen)
1.1 jdolecek 1533: goto out;
1.41 rumble 1534: error = uiomove(dirbuf, dirbuf->d_reclen, uio);
1.1 jdolecek 1535: if (error)
1536: goto out;
1537: offset += sizeof(struct direntry);
1538: uio_off = offset;
1539: if (cookies) {
1540: *cookies++ = offset;
1541: ncookies++;
1542: if (ncookies >= nc)
1543: goto out;
1544: }
1545: }
1546: }
1547: }
1548:
1549: while (uio->uio_resid > 0) {
1550: lbn = de_cluster(pmp, offset - bias);
1551: on = (offset - bias) & pmp->pm_crbomask;
1552: n = MIN(pmp->pm_bpcluster - on, uio->uio_resid);
1553: diff = dep->de_FileSize - (offset - bias);
1554: if (diff <= 0)
1555: break;
1556: n = MIN(n, diff);
1557: if ((error = pcbmap(dep, lbn, &bn, &cn, &blsize)) != 0)
1558: break;
1.34 scw 1559: error = bread(pmp->pm_devvp, de_bn2kb(pmp, bn), blsize,
1560: NOCRED, &bp);
1.1 jdolecek 1561: if (error) {
1.42 ad 1562: brelse(bp, 0);
1.41 rumble 1563: free(dirbuf, M_MSDOSFSTMP);
1.1 jdolecek 1564: return (error);
1565: }
1566: n = MIN(n, blsize - bp->b_resid);
1567:
1568: /*
1569: * Convert from dos directory entries to fs-independent
1570: * directory entries.
1571: */
1.38 christos 1572: for (dentp = (struct direntry *)((char *)bp->b_data + on);
1573: (char *)dentp < (char *)bp->b_data + on + n;
1.1 jdolecek 1574: dentp++, offset += sizeof(struct direntry)) {
1575: #if 0
1576:
1577: printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n",
1578: dentp, prev, crnt, dentp->deName[0], dentp->deAttributes);
1579: #endif
1580: /*
1581: * If this is an unused entry, we can stop.
1582: */
1583: if (dentp->deName[0] == SLOT_EMPTY) {
1.42 ad 1584: brelse(bp, 0);
1.1 jdolecek 1585: goto out;
1586: }
1587: /*
1588: * Skip deleted entries.
1589: */
1590: if (dentp->deName[0] == SLOT_DELETED) {
1591: chksum = -1;
1592: continue;
1593: }
1594:
1595: /*
1596: * Handle Win95 long directory entries
1597: */
1598: if (dentp->deAttributes == ATTR_WIN95) {
1599: if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME)
1600: continue;
1.41 rumble 1601: chksum = win2unixfn((struct winentry *)dentp,
1602: dirbuf, chksum);
1.1 jdolecek 1603: continue;
1604: }
1605:
1606: /*
1607: * Skip volume labels
1608: */
1609: if (dentp->deAttributes & ATTR_VOLUME) {
1610: chksum = -1;
1611: continue;
1612: }
1613: /*
1614: * This computation of d_fileno must match
1615: * the computation of va_fileid in
1616: * msdosfs_getattr.
1617: */
1618: if (dentp->deAttributes & ATTR_DIRECTORY) {
1619: fileno = getushort(dentp->deStartCluster);
1620: if (FAT32(pmp))
1.19 christos 1621: fileno |= ((ino_t)getushort(dentp->deHighClust)) << 16;
1.1 jdolecek 1622: /* if this is the root directory */
1623: if (fileno == MSDOSFSROOT)
1624: if (FAT32(pmp))
1625: fileno = cntobn(pmp,
1.19 christos 1626: (ino_t)pmp->pm_rootdirblk)
1627: * dirsperblk;
1.1 jdolecek 1628: else
1629: fileno = 1;
1630: else
1631: fileno = cntobn(pmp, fileno) * dirsperblk;
1.41 rumble 1632: dirbuf->d_fileno = fileno;
1633: dirbuf->d_type = DT_DIR;
1.1 jdolecek 1634: } else {
1.41 rumble 1635: dirbuf->d_fileno =
1636: offset / sizeof(struct direntry);
1637: dirbuf->d_type = DT_REG;
1.1 jdolecek 1638: }
1639: if (chksum != winChksum(dentp->deName))
1.41 rumble 1640: dirbuf->d_namlen = dos2unixfn(dentp->deName,
1641: (u_char *)dirbuf->d_name,
1.1 jdolecek 1642: pmp->pm_flags & MSDOSFSMNT_SHORTNAME);
1643: else
1.41 rumble 1644: dirbuf->d_name[dirbuf->d_namlen] = 0;
1.1 jdolecek 1645: chksum = -1;
1.41 rumble 1646: dirbuf->d_reclen = _DIRENT_SIZE(dirbuf);
1647: if (uio->uio_resid < dirbuf->d_reclen) {
1.42 ad 1648: brelse(bp, 0);
1.1 jdolecek 1649: goto out;
1650: }
1.41 rumble 1651: error = uiomove(dirbuf, dirbuf->d_reclen, uio);
1.1 jdolecek 1652: if (error) {
1.42 ad 1653: brelse(bp, 0);
1.1 jdolecek 1654: goto out;
1655: }
1656: uio_off = offset + sizeof(struct direntry);
1657: if (cookies) {
1658: *cookies++ = offset + sizeof(struct direntry);
1659: ncookies++;
1660: if (ncookies >= nc) {
1.42 ad 1661: brelse(bp, 0);
1.1 jdolecek 1662: goto out;
1663: }
1664: }
1665: }
1.42 ad 1666: brelse(bp, 0);
1.1 jdolecek 1667: }
1668:
1669: out:
1670: uio->uio_offset = uio_off;
1671: uio->uio_resid += lost;
1672: if (dep->de_FileSize - (offset - bias) <= 0)
1673: *ap->a_eofflag = 1;
1674: else
1675: *ap->a_eofflag = 0;
1676:
1677: if (ap->a_ncookies) {
1678: if (error) {
1679: free(*ap->a_cookies, M_TEMP);
1680: *ap->a_ncookies = 0;
1681: *ap->a_cookies = NULL;
1682: } else
1683: *ap->a_ncookies = ncookies;
1684: }
1.41 rumble 1685: free(dirbuf, M_MSDOSFSTMP);
1.1 jdolecek 1686: return (error);
1687: }
1688:
1689: /*
1690: * DOS filesystems don't know what symlinks are.
1691: */
1692: int
1.33 christos 1693: msdosfs_readlink(void *v)
1.1 jdolecek 1694: {
1695: #if 0
1696: struct vop_readlink_args /* {
1697: struct vnode *a_vp;
1698: struct uio *a_uio;
1.28 elad 1699: kauth_cred_t a_cred;
1.1 jdolecek 1700: } */ *ap;
1701: #endif
1702:
1703: return (EINVAL);
1704: }
1705:
1706: /*
1707: * vp - address of vnode file the file
1708: * bn - which cluster we are interested in mapping to a filesystem block number.
1709: * vpp - returns the vnode for the block special file holding the filesystem
1710: * containing the file of interest
1711: * bnp - address of where to return the filesystem relative block number
1712: */
1713: int
1714: msdosfs_bmap(v)
1715: void *v;
1716: {
1717: struct vop_bmap_args /* {
1718: struct vnode *a_vp;
1719: daddr_t a_bn;
1720: struct vnode **a_vpp;
1721: daddr_t *a_bnp;
1722: int *a_runp;
1723: } */ *ap = v;
1724: struct denode *dep = VTODE(ap->a_vp);
1.47 christos 1725: int run, maxrun;
1726: daddr_t runbn;
1.34 scw 1727: int status;
1.1 jdolecek 1728:
1729: if (ap->a_vpp != NULL)
1730: *ap->a_vpp = dep->de_devvp;
1731: if (ap->a_bnp == NULL)
1732: return (0);
1.47 christos 1733: status = pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0);
1734:
1735: /*
1736: * From FreeBSD:
1737: * A little kludgy, but we loop calling pcbmap until we
1738: * reach the end of the contiguous piece, or reach MAXPHYS.
1739: * Since it reduces disk I/Os, the "wasted" CPU is put to
1740: * good use (4 to 5 fold sequential read I/O improvement on USB
1741: * drives).
1742: */
1743: if (ap->a_runp != NULL) {
1744: /* taken from ufs_bmap */
1745: maxrun = ulmin(MAXPHYS / dep->de_pmp->pm_bpcluster - 1,
1746: dep->de_pmp->pm_maxcluster - ap->a_bn);
1747: for (run = 1; run <= maxrun; run++) {
1748: if (pcbmap(dep, ap->a_bn + run, &runbn, NULL, NULL)
1749: != 0 || runbn !=
1750: *ap->a_bnp + de_cn2bn(dep->de_pmp, run))
1751: break;
1752: }
1753: *ap->a_runp = run - 1;
1.1 jdolecek 1754: }
1.47 christos 1755:
1.34 scw 1756: /*
1757: * We need to scale *ap->a_bnp by sector_size/DEV_BSIZE
1758: */
1759: *ap->a_bnp = de_bn2kb(dep->de_pmp, *ap->a_bnp);
1760: return status;
1.1 jdolecek 1761: }
1762:
1763: int
1764: msdosfs_strategy(v)
1765: void *v;
1766: {
1767: struct vop_strategy_args /* {
1.9 hannken 1768: struct vnode *a_vp;
1.1 jdolecek 1769: struct buf *a_bp;
1770: } */ *ap = v;
1.9 hannken 1771: struct vnode *vp = ap->a_vp;
1.1 jdolecek 1772: struct buf *bp = ap->a_bp;
1773: struct denode *dep = VTODE(bp->b_vp);
1774: int error = 0;
1775:
1.9 hannken 1776: if (vp->v_type == VBLK || vp->v_type == VCHR)
1.1 jdolecek 1777: panic("msdosfs_strategy: spec");
1778: /*
1779: * If we don't already know the filesystem relative block number
1780: * then get it using pcbmap(). If pcbmap() returns the block
1781: * number as -1 then we've got a hole in the file. DOS filesystems
1782: * don't allow files with holes, so we shouldn't ever see this.
1783: */
1784: if (bp->b_blkno == bp->b_lblkno) {
1785: error = pcbmap(dep, de_bn2cn(dep->de_pmp, bp->b_lblkno),
1786: &bp->b_blkno, 0, 0);
1787: if (error)
1788: bp->b_blkno = -1;
1789: if (bp->b_blkno == -1)
1790: clrbuf(bp);
1.34 scw 1791: else
1792: bp->b_blkno = de_bn2kb(dep->de_pmp, bp->b_blkno);
1.1 jdolecek 1793: }
1794: if (bp->b_blkno == -1) {
1795: biodone(bp);
1796: return (error);
1797: }
1798:
1799: /*
1800: * Read/write the block from/to the disk that contains the desired
1801: * file block.
1802: */
1803:
1804: vp = dep->de_devvp;
1.8 hannken 1805: return (VOP_STRATEGY(vp, bp));
1.1 jdolecek 1806: }
1807:
1808: int
1809: msdosfs_print(v)
1810: void *v;
1811: {
1812: struct vop_print_args /* {
1813: struct vnode *vp;
1814: } */ *ap = v;
1815: struct denode *dep = VTODE(ap->a_vp);
1816:
1817: printf(
1818: "tag VT_MSDOSFS, startcluster %ld, dircluster %ld, diroffset %ld ",
1819: dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset);
1820: printf(" dev %d, %d ", major(dep->de_dev), minor(dep->de_dev));
1821: lockmgr_printinfo(&ap->a_vp->v_lock);
1822: printf("\n");
1823: return (0);
1824: }
1825:
1826: int
1827: msdosfs_advlock(v)
1828: void *v;
1829: {
1830: struct vop_advlock_args /* {
1831: struct vnode *a_vp;
1.11 jrf 1832: void *a_id;
1.1 jdolecek 1833: int a_op;
1834: struct flock *a_fl;
1835: int a_flags;
1836: } */ *ap = v;
1837: struct denode *dep = VTODE(ap->a_vp);
1838:
1839: return lf_advlock(ap, &dep->de_lockf, dep->de_FileSize);
1840: }
1841:
1842: int
1843: msdosfs_pathconf(v)
1844: void *v;
1845: {
1846: struct vop_pathconf_args /* {
1847: struct vnode *a_vp;
1848: int a_name;
1849: register_t *a_retval;
1850: } */ *ap = v;
1851:
1852: switch (ap->a_name) {
1853: case _PC_LINK_MAX:
1854: *ap->a_retval = 1;
1855: return (0);
1856: case _PC_NAME_MAX:
1.12 jdolecek 1857: *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax;
1.1 jdolecek 1858: return (0);
1859: case _PC_PATH_MAX:
1860: *ap->a_retval = PATH_MAX;
1861: return (0);
1862: case _PC_CHOWN_RESTRICTED:
1863: *ap->a_retval = 1;
1864: return (0);
1865: case _PC_NO_TRUNC:
1866: *ap->a_retval = 0;
1867: return (0);
1868: case _PC_SYNC_IO:
1869: *ap->a_retval = 1;
1870: return (0);
1871: case _PC_FILESIZEBITS:
1872: *ap->a_retval = 32;
1873: return (0);
1874: default:
1875: return (EINVAL);
1876: }
1877: /* NOTREACHED */
1878: }
1879:
1.21 yamt 1880: int
1881: msdosfs_fsync(v)
1882: void *v;
1883: {
1884: struct vop_fsync_args /* {
1885: struct vnode *a_vp;
1.28 elad 1886: kauth_cred_t a_cred;
1.21 yamt 1887: int a_flags;
1888: off_t offlo;
1889: off_t offhi;
1890: } */ *ap = v;
1891: struct vnode *vp = ap->a_vp;
1892: int wait;
1893: int error;
1894:
1895: wait = (ap->a_flags & FSYNC_WAIT) != 0;
1896: vflushbuf(vp, wait);
1897: if ((ap->a_flags & FSYNC_DATAONLY) != 0)
1898: error = 0;
1899: else
1900: error = msdosfs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0);
1901:
1902: if (error == 0 && ap->a_flags & FSYNC_CACHE) {
1903: struct denode *dep = VTODE(vp);
1904: struct vnode *devvp = dep->de_devvp;
1905:
1906: int l = 0;
1907: error = VOP_IOCTL(devvp, DIOCCACHESYNC, &l, FWRITE,
1.44 pooka 1908: curlwp->l_cred);
1.21 yamt 1909: }
1910:
1911: return (error);
1912: }
1913:
1.20 christos 1914: void
1915: msdosfs_detimes(struct denode *dep, const struct timespec *acc,
1916: const struct timespec *mod, const struct timespec *cre, int gmtoff)
1917: {
1918: struct timespec *ts = NULL, tsb;
1919:
1920: KASSERT(dep->de_flag & (DE_UPDATE | DE_CREATE | DE_ACCESS));
1.29 kardel 1921: /* XXX just call getnanotime early and use result if needed? */
1.20 christos 1922: dep->de_flag |= DE_MODIFIED;
1923: if (dep->de_flag & DE_UPDATE) {
1.29 kardel 1924: if (mod == NULL) {
1925: getnanotime(&tsb);
1926: mod = ts = &tsb;
1927: }
1.20 christos 1928: unix2dostime(mod, gmtoff, &dep->de_MDate, &dep->de_MTime, NULL);
1929: dep->de_Attributes |= ATTR_ARCHIVE;
1930: }
1931: if ((dep->de_pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0) {
1932: if (dep->de_flag & DE_ACCESS) {
1933: if (acc == NULL)
1.29 kardel 1934: acc = ts == NULL ?
1935: (getnanotime(&tsb), ts = &tsb) : ts;
1.20 christos 1936: unix2dostime(acc, gmtoff, &dep->de_ADate, NULL, NULL);
1937: }
1938: if (dep->de_flag & DE_CREATE) {
1939: if (cre == NULL)
1.29 kardel 1940: cre = ts == NULL ?
1941: (getnanotime(&tsb), ts = &tsb) : ts;
1.20 christos 1942: unix2dostime(cre, gmtoff, &dep->de_CDate,
1943: &dep->de_CTime, &dep->de_CHun);
1944: }
1945: }
1946:
1947: dep->de_flag &= ~(DE_UPDATE | DE_CREATE | DE_ACCESS);
1948: }
1949:
1.1 jdolecek 1950: /* Global vfs data structures for msdosfs */
1.18 xtraeme 1951: int (**msdosfs_vnodeop_p)(void *);
1.1 jdolecek 1952: const struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = {
1953: { &vop_default_desc, vn_default_error },
1954: { &vop_lookup_desc, msdosfs_lookup }, /* lookup */
1955: { &vop_create_desc, msdosfs_create }, /* create */
1956: { &vop_mknod_desc, msdosfs_mknod }, /* mknod */
1957: { &vop_open_desc, msdosfs_open }, /* open */
1958: { &vop_close_desc, msdosfs_close }, /* close */
1959: { &vop_access_desc, msdosfs_access }, /* access */
1960: { &vop_getattr_desc, msdosfs_getattr }, /* getattr */
1961: { &vop_setattr_desc, msdosfs_setattr }, /* setattr */
1962: { &vop_read_desc, msdosfs_read }, /* read */
1963: { &vop_write_desc, msdosfs_write }, /* write */
1964: { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */
1965: { &vop_ioctl_desc, msdosfs_ioctl }, /* ioctl */
1966: { &vop_poll_desc, msdosfs_poll }, /* poll */
1967: { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */
1968: { &vop_revoke_desc, msdosfs_revoke }, /* revoke */
1969: { &vop_mmap_desc, msdosfs_mmap }, /* mmap */
1970: { &vop_fsync_desc, msdosfs_fsync }, /* fsync */
1971: { &vop_seek_desc, msdosfs_seek }, /* seek */
1972: { &vop_remove_desc, msdosfs_remove }, /* remove */
1973: { &vop_link_desc, msdosfs_link }, /* link */
1974: { &vop_rename_desc, msdosfs_rename }, /* rename */
1975: { &vop_mkdir_desc, msdosfs_mkdir }, /* mkdir */
1976: { &vop_rmdir_desc, msdosfs_rmdir }, /* rmdir */
1977: { &vop_symlink_desc, msdosfs_symlink }, /* symlink */
1978: { &vop_readdir_desc, msdosfs_readdir }, /* readdir */
1979: { &vop_readlink_desc, msdosfs_readlink }, /* readlink */
1980: { &vop_abortop_desc, msdosfs_abortop }, /* abortop */
1981: { &vop_inactive_desc, msdosfs_inactive }, /* inactive */
1982: { &vop_reclaim_desc, msdosfs_reclaim }, /* reclaim */
1983: { &vop_lock_desc, genfs_lock }, /* lock */
1984: { &vop_unlock_desc, genfs_unlock }, /* unlock */
1985: { &vop_bmap_desc, msdosfs_bmap }, /* bmap */
1986: { &vop_strategy_desc, msdosfs_strategy }, /* strategy */
1987: { &vop_print_desc, msdosfs_print }, /* print */
1988: { &vop_islocked_desc, genfs_islocked }, /* islocked */
1989: { &vop_pathconf_desc, msdosfs_pathconf }, /* pathconf */
1990: { &vop_advlock_desc, msdosfs_advlock }, /* advlock */
1991: { &vop_bwrite_desc, vn_bwrite }, /* bwrite */
1992: { &vop_getpages_desc, genfs_getpages }, /* getpages */
1993: { &vop_putpages_desc, genfs_putpages }, /* putpages */
1994: { NULL, NULL }
1995: };
1996: const struct vnodeopv_desc msdosfs_vnodeop_opv_desc =
1997: { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries };
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