1 /* $NetBSD: ntfs_vnops.c,v 1.23 1999/10/31 19:45:27 jdolecek Exp $ */
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
8 * John Heidemann of the UCLA Ficus project.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * $FreeBSD: src/sys/ntfs/ntfs_vnops.c,v 1.9.2.4 2002/08/06 19:35:18 semenu Exp $
38 #include <sys/param.h>
39 #include <sys/systm.h>
41 #include <sys/kernel.h>
43 #include <sys/types.h>
45 #include <sys/vnode.h>
46 #include <sys/mount.h>
48 #include <sys/namei.h>
49 #include <sys/malloc.h>
51 #include <sys/dirent.h>
52 #include <machine/limits.h>
55 #include <vm/vm_param.h>
56 #include <vm/vm_page.h>
57 #include <vm/vm_object.h>
58 #include <vm/vm_pager.h>
59 #include <vm/vnode_pager.h>
60 #include <vm/vm_extern.h>
62 #include <sys/sysctl.h>
67 #include "ntfs_inode.h"
68 #include "ntfs_subr.h"
70 #include <sys/unistd.h> /* for pathconf(2) constants */
72 static int ntfs_read (struct vop_read_args *);
73 static int ntfs_write (struct vop_write_args *ap);
74 static int ntfs_getattr (struct vop_getattr_args *ap);
75 static int ntfs_inactive (struct vop_inactive_args *ap);
76 static int ntfs_print (struct vop_print_args *ap);
77 static int ntfs_reclaim (struct vop_reclaim_args *ap);
78 static int ntfs_strategy (struct vop_strategy_args *ap);
79 static int ntfs_access (struct vop_access_args *ap);
80 static int ntfs_open (struct vop_open_args *ap);
81 static int ntfs_close (struct vop_close_args *ap);
82 static int ntfs_readdir (struct vop_readdir_args *ap);
83 static int ntfs_lookup (struct vop_old_lookup_args *ap);
84 static int ntfs_bmap (struct vop_bmap_args *ap);
85 static int ntfs_fsync (struct vop_fsync_args *ap);
86 static int ntfs_pathconf (struct vop_pathconf_args *);
88 int ntfs_prtactive = 1; /* 1 => print out reclaim of active vnodes */
91 * This is a noop, simply returning what one has been given.
93 * ntfs_bmap(struct vnode *a_vp, off_t a_loffset,
94 * daddr_t *a_doffsetp, int *a_runp, int *a_runb)
97 ntfs_bmap(struct vop_bmap_args *ap)
99 dprintf(("ntfs_bmap: vn: %p, blk: %u\n", ap->a_vp,
100 (u_int32_t)ap->a_loffset));
101 if (ap->a_doffsetp != NULL)
102 *ap->a_doffsetp = ap->a_loffset;
103 if (ap->a_runp != NULL)
105 if (ap->a_runb != NULL)
111 * ntfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
112 * struct ucred *a_cred)
115 ntfs_read(struct vop_read_args *ap)
117 struct vnode *vp = ap->a_vp;
118 struct fnode *fp = VTOF(vp);
119 struct ntnode *ip = FTONT(fp);
120 struct uio *uio = ap->a_uio;
121 struct ntfsmount *ntmp = ip->i_mp;
124 int resid, off, toread;
127 dprintf(("ntfs_read: ino: %ju, off: %u resid: %zd, segflg: %d\n",
128 (uintmax_t)ip->i_number, (uint32_t)uio->uio_offset,
129 uio->uio_resid, uio->uio_segflg));
131 dprintf(("ntfs_read: filesize: %ju", (uintmax_t)fp->f_size));
133 /* don't allow reading after end of file */
134 if (uio->uio_offset > fp->f_size)
137 resid = (int)szmin(uio->uio_resid, fp->f_size - uio->uio_offset);
139 dprintf((", resid: %d\n", resid));
143 cn = ntfs_btocn(uio->uio_offset);
144 off = ntfs_btocnoff(uio->uio_offset);
146 toread = min(off + resid, ntfs_cntob(1));
148 error = bread(vp, ntfs_cntodoff(cn), ntfs_cntob(1), &bp);
154 error = uiomovebp(bp, bp->b_data + off, toread - off, uio);
161 resid -= toread - off;
168 * ntfs_getattr(struct vnode *a_vp, struct vattr *a_vap)
171 ntfs_getattr(struct vop_getattr_args *ap)
173 struct vnode *vp = ap->a_vp;
174 struct fnode *fp = VTOF(vp);
175 struct ntnode *ip = FTONT(fp);
176 struct vattr *vap = ap->a_vap;
178 dprintf(("ntfs_getattr: %ju, flags: %d\n", (uintmax_t)ip->i_number,
181 vap->va_fsid = devid_from_dev(ip->i_dev);
182 vap->va_fileid = ip->i_number;
183 vap->va_mode = ip->i_mp->ntm_mode;
184 vap->va_nlink = ip->i_nlink;
185 vap->va_uid = ip->i_mp->ntm_uid;
186 vap->va_gid = ip->i_mp->ntm_gid;
187 vap->va_rmajor = VNOVAL;
188 vap->va_rminor = VNOVAL;
189 vap->va_size = fp->f_size;
190 vap->va_bytes = fp->f_allocated;
191 vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access);
192 vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write);
193 vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create);
194 vap->va_flags = ip->i_flag;
196 vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps;
197 vap->va_type = vp->v_type;
204 * Last reference to an ntnode. If necessary, write or delete it.
206 * ntfs_inactive(struct vnode *a_vp)
209 ntfs_inactive(struct vop_inactive_args *ap)
211 struct vnode *vp = ap->a_vp;
213 struct ntnode *ip = VTONT(vp);
216 dprintf(("ntfs_inactive: vnode: %p, ntnode: %ju\n", vp, (uintmax_t)ip->i_number));
218 if (ntfs_prtactive && VREFCNT(vp) > 1)
219 vprint("ntfs_inactive: pushing active", vp);
222 * XXX since we don't support any filesystem changes
223 * right now, nothing more needs to be done
229 * Reclaim an fnode/ntnode so that it can be used for other purposes.
231 * ntfs_reclaim(struct vnode *a_vp)
234 ntfs_reclaim(struct vop_reclaim_args *ap)
236 struct vnode *vp = ap->a_vp;
237 struct fnode *fp = VTOF(vp);
238 struct ntnode *ip = FTONT(fp);
241 dprintf(("ntfs_reclaim: vnode: %p, ntnode: %ju\n", vp, (uintmax_t)ip->i_number));
243 if (ntfs_prtactive && VREFCNT(vp) > 1)
244 vprint("ntfs_reclaim: pushing active", vp);
246 if ((error = ntfs_ntget(ip)) != 0)
257 * ntfs_print(struct vnode *a_vp)
260 ntfs_print(struct vop_print_args *ap)
266 * Calculate the logical to physical mapping if not done already,
267 * then call the device strategy routine.
269 * ntfs_strategy(struct vnode *a_vp, struct bio *a_bio)
272 ntfs_strategy(struct vop_strategy_args *ap)
274 struct bio *bio = ap->a_bio;
275 struct buf *bp = bio->bio_buf;
276 struct vnode *vp = ap->a_vp;
277 struct fnode *fp = VTOF(vp);
278 struct ntnode *ip = FTONT(fp);
279 struct ntfsmount *ntmp = ip->i_mp;
285 dprintf(("ntfs_strategy: loffset: %u, doffset: %u\n",
286 (uint32_t)bp->b_loffset, (uint32_t)bio->bio_offset));
288 dprintf(("strategy: bcount: %u flags: 0x%x\n",
289 bp->b_bcount, bp->b_flags));
295 if (bio->bio_offset >= fp->f_size) {
299 toread = min(bp->b_bcount,
300 fp->f_size - bio->bio_offset);
301 dprintf(("ntfs_strategy: toread: %u, fsize: %ju\n",
302 toread, (uintmax_t)fp->f_size));
304 error = ntfs_readattr(ntmp, ip, fp->f_attrtype,
305 fp->f_attrname, bio->bio_offset,
306 toread, bp->b_data, NULL);
309 kprintf("ntfs_strategy: ntfs_readattr failed\n");
311 bp->b_flags |= B_ERROR;
314 bzero(bp->b_data + toread, bp->b_bcount - toread);
318 if (bio->bio_offset + bp->b_bcount >= fp->f_size) {
319 kprintf("ntfs_strategy: CAN'T EXTEND FILE\n");
320 bp->b_error = error = EFBIG;
321 bp->b_flags |= B_ERROR;
323 towrite = min(bp->b_bcount,
324 fp->f_size - bio->bio_offset);
325 dprintf(("ntfs_strategy: towrite: %d, fsize: %ju\n",
326 towrite, (uintmax_t)fp->f_size));
328 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
329 fp->f_attrname, bio->bio_offset,towrite,
330 bp->b_data, &tmp, NULL);
333 kprintf("ntfs_strategy: ntfs_writeattr fail\n");
335 bp->b_flags |= B_ERROR;
340 panic("ntfs: bad b_cmd %d", bp->b_cmd);
347 * ntfs_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
348 * struct ucred *a_cred)
351 ntfs_write(struct vop_write_args *ap)
353 struct vnode *vp = ap->a_vp;
354 struct fnode *fp = VTOF(vp);
355 struct ntnode *ip = FTONT(fp);
356 struct uio *uio = ap->a_uio;
357 struct ntfsmount *ntmp = ip->i_mp;
362 dprintf(("ntfs_write: ino: %ju, off: %u resid: %zd, segflg: %d\n",
363 (uintmax_t)ip->i_number, (uint32_t)uio->uio_offset,
364 uio->uio_resid, uio->uio_segflg));
365 dprintf(("ntfs_write: filesize: %ju ", (uintmax_t)fp->f_size));
367 if (uio->uio_resid + uio->uio_offset > fp->f_size) {
368 kprintf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n");
371 if (uio->uio_offset > fp->f_size)
374 towrite = szmin(uio->uio_resid, fp->f_size - uio->uio_offset);
376 dprintf((", towrite: %zd\n", towrite));
378 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
379 fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio);
382 kprintf("ntfs_write: ntfs_writeattr failed: %d\n", error);
389 * ntfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred)
392 ntfs_access(struct vop_access_args *ap)
394 struct vnode *vp = ap->a_vp;
395 struct ntnode *ip = VTONT(vp);
396 struct ucred *cred = ap->a_cred;
397 mode_t mask, mode = ap->a_mode;
404 dprintf(("ntfs_access: %ju\n", (uintmax_t)ip->i_number));
407 * Disallow write attempts on read-only file systems;
408 * unless the file is a socket, fifo, or a block or
409 * character device resident on the file system.
412 switch ((int)vp->v_type) {
416 if (vp->v_mount->mnt_flag & MNT_RDONLY)
419 if (error = getinoquota(ip))
426 /* Otherwise, user id 0 always gets access. */
427 if (cred->cr_uid == 0)
432 /* Otherwise, check the owner. */
433 if (cred->cr_uid == ip->i_mp->ntm_uid) {
440 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES);
443 /* Otherwise, check the groups. */
444 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
445 if (ip->i_mp->ntm_gid == *gp) {
452 return ((ip->i_mp->ntm_mode&mask) == mask ? 0 : EACCES);
455 /* Otherwise, check everyone else. */
462 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES);
470 * ntfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
475 ntfs_open(struct vop_open_args *ap)
477 return (vop_stdopen(ap));
483 * Update the times on the inode.
485 * ntfs_close(struct vnode *a_vp, int a_fflag)
489 ntfs_close(struct vop_close_args *ap)
492 struct vnode *vp = ap->a_vp;
493 struct ntnode *ip = VTONT(vp);
495 kprintf("ntfs_close: %ju\n", (uintmax_t)ip->i_number);
498 return (vop_stdclose(ap));
502 * ntfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred,
503 * int *a_ncookies, off_t **cookies)
506 ntfs_readdir(struct vop_readdir_args *ap)
508 struct vnode *vp = ap->a_vp;
509 struct fnode *fp = VTOF(vp);
510 struct ntnode *ip = FTONT(fp);
511 struct uio *uio = ap->a_uio;
512 struct ntfsmount *ntmp = ip->i_mp;
515 u_int32_t faked = 0, num, off;
517 char convname[NTFS_MAXFILENAME + 1];
519 dprintf(("ntfs_readdir %ju off: %u resid: %zd\n",
520 (uintmax_t)ip->i_number, (uint32_t)uio->uio_offset,
523 if (uio->uio_offset < 0 || uio->uio_offset > INT_MAX)
525 error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY | LK_FAILRECLAIM);
530 * uio->uio_offset carries the number of the entry
531 * where we should start returning dirents.
533 * We fake up "." if we're not reading the FS root
534 * and we always fake up "..".
536 * off contains the entry we are starting at,
537 * num increments while we are reading.
540 off = num = uio->uio_offset;
541 faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2;
543 /* Simulate . in every dir except ROOT */
544 if (ip->i_number != NTFS_ROOTINO && num == 0) {
545 if (vop_write_dirent(&error, uio, ip->i_number,
555 /* Simulate .. in every dir including ROOT */
556 if (num == faked - 1) {
557 /* XXX NTFS_ROOTINO seems to be wrong here */
558 if (vop_write_dirent(&error, uio, NTFS_ROOTINO,
569 struct attr_indexentry *iep;
572 * num is the number of the entry we will return,
573 * but ntfs_ntreaddir takes the entry number of the
574 * ntfs directory listing, so subtract the faked
577 error = ntfs_ntreaddir(ntmp, fp, num - faked, &iep);
585 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST);
586 iep = NTFS_NEXTREC(iep, struct attr_indexentry *))
588 if(!ntfs_isnamepermitted(ntmp,iep))
590 for(i=0, j=0; i < iep->ie_fnamelen; i++, j++) {
591 c = NTFS_U28(iep->ie_fname[i]);
593 convname[j++] = (char)(c>>8);
594 convname[j] = (char)c&0xFF;
597 if (vop_write_dirent(&error, uio, iep->ie_number,
598 (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG,
602 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, "
604 ncookies, convname, iep->ie_fnametype,
606 (iep->ie_fflag & NTFS_FFLAG_DIR) ?
618 uio->uio_offset = num;
620 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n",
621 ncookies,(u_int)(uio->uio_offset - off)));
622 dprintf(("ntfs_readdir: off: %u resid: %zd\n",
623 (uint32_t)uio->uio_offset, uio->uio_resid));
625 if (!error && ap->a_ncookies != NULL) {
629 ddprintf(("ntfs_readdir: %d cookies\n",ncookies));
630 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
631 panic("ntfs_readdir: unexpected uio from NFS server");
632 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
637 *ap->a_ncookies = ncookies;
638 *ap->a_cookies = cookies;
642 *ap->a_eofflag = VTONT(vp)->i_size <= uio->uio_offset;
650 * ntfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp,
651 * struct componentname *a_cnp)
654 ntfs_lookup(struct vop_old_lookup_args *ap)
656 struct vnode *dvp = ap->a_dvp;
657 struct ntnode *dip = VTONT(dvp);
658 struct ntfsmount *ntmp = dip->i_mp;
659 struct componentname *cnp = ap->a_cnp;
661 int lockparent = cnp->cn_flags & CNP_LOCKPARENT;
663 int wantparent = cnp->cn_flags & (CNP_LOCKPARENT | CNP_WANTPARENT);
665 dprintf(("ntfs_lookup: \"%.*s\" (%ld bytes) in %ju, lp: %d, wp: %d \n",
666 (int)cnp->cn_namelen, cnp->cn_nameptr, cnp->cn_namelen,
667 (uintmax_t)dip->i_number, lockparent, wantparent));
671 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
672 dprintf(("ntfs_lookup: faking . directory in %u\n",
673 (uint32_t)dip->i_number));
678 } else if (cnp->cn_flags & CNP_ISDOTDOT) {
681 dprintf(("ntfs_lookup: faking .. directory in %d\n",
682 (uint32_t)dip->i_number));
684 error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap);
689 cnp->cn_flags |= CNP_PDIRUNLOCK;
691 dprintf(("ntfs_lookup: parentdir: %d\n",
692 vap->va_a_name->n_pnumber));
693 error = VFS_VGET(ntmp->ntm_mountp, NULL,
694 vap->va_a_name->n_pnumber,ap->a_vpp);
695 ntfs_ntvattrrele(vap);
697 if (VOP_LOCK(dvp, LK_EXCLUSIVE | LK_RETRY) == 0)
698 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
703 error = VOP_LOCK(dvp, LK_EXCLUSIVE);
709 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
712 error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp);
714 dprintf(("ntfs_ntlookupfile: returned %d\n", error));
718 dprintf(("ntfs_lookup: found ino: %u\n",
719 (uint32_t)VTONT(*ap->a_vpp)->i_number));
723 cnp->cn_flags |= CNP_PDIRUNLOCK;
730 * Flush the blocks of a file to disk.
732 * This function is worthless for vnodes that represent directories. Maybe we
733 * could just do a sync if they try an fsync on a directory file.
735 * ntfs_fsync(struct vnode *a_vp, int a_waitfor)
738 ntfs_fsync(struct vop_fsync_args *ap)
744 * Return POSIX pathconf information applicable to NTFS filesystem
747 ntfs_pathconf(struct vop_pathconf_args *ap)
749 switch (ap->a_name) {
754 *ap->a_retval = NTFS_MAXFILENAME;
757 *ap->a_retval = PATH_MAX;
759 case _PC_CHOWN_RESTRICTED:
772 * Global vfs data structures
774 struct vop_ops ntfs_vnode_vops = {
775 .vop_default = vop_defaultop,
776 .vop_getattr = ntfs_getattr,
777 .vop_inactive = ntfs_inactive,
778 .vop_reclaim = ntfs_reclaim,
779 .vop_print = ntfs_print,
780 .vop_pathconf = ntfs_pathconf,
781 .vop_old_lookup = ntfs_lookup,
782 .vop_access = ntfs_access,
783 .vop_close = ntfs_close,
784 .vop_open = ntfs_open,
785 .vop_readdir = ntfs_readdir,
786 .vop_fsync = ntfs_fsync,
787 .vop_bmap = ntfs_bmap,
788 .vop_getpages = vop_stdgetpages,
789 .vop_putpages = vop_stdputpages,
790 .vop_strategy = ntfs_strategy,
791 .vop_read = ntfs_read,
792 .vop_write = ntfs_write