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>
40 #include <sys/kernel.h>
42 #include <sys/types.h>
44 #include <sys/vnode.h>
45 #include <sys/mount.h>
47 #include <sys/namei.h>
48 #include <sys/malloc.h>
50 #include <sys/dirent.h>
51 #include <machine/limits.h>
54 #include <vm/vm_param.h>
55 #if defined(__NetBSD__)
56 #include <vm/vm_prot.h>
58 #include <vm/vm_page.h>
59 #include <vm/vm_object.h>
60 #include <vm/vm_pager.h>
61 #if defined(__DragonFly__)
62 #include <vm/vnode_pager.h>
64 #include <vm/vm_extern.h>
66 #include <sys/sysctl.h>
71 #include "ntfs_inode.h"
72 #include "ntfs_subr.h"
73 #if defined(__NetBSD__)
74 #include <miscfs/specfs/specdev.h>
75 #include <miscfs/genfs/genfs.h>
78 #include <sys/unistd.h> /* for pathconf(2) constants */
80 static int ntfs_read (struct vop_read_args *);
81 static int ntfs_write (struct vop_write_args *ap);
82 static int ntfs_getattr (struct vop_getattr_args *ap);
83 static int ntfs_inactive (struct vop_inactive_args *ap);
84 static int ntfs_print (struct vop_print_args *ap);
85 static int ntfs_reclaim (struct vop_reclaim_args *ap);
86 static int ntfs_strategy (struct vop_strategy_args *ap);
87 static int ntfs_access (struct vop_access_args *ap);
88 static int ntfs_open (struct vop_open_args *ap);
89 static int ntfs_close (struct vop_close_args *ap);
90 static int ntfs_readdir (struct vop_readdir_args *ap);
91 static int ntfs_lookup (struct vop_old_lookup_args *ap);
92 static int ntfs_bmap (struct vop_bmap_args *ap);
93 #if defined(__DragonFly__)
94 static int ntfs_fsync (struct vop_fsync_args *ap);
96 static int ntfs_bypass (struct vop_generic_args *);
98 static int ntfs_pathconf (struct vop_pathconf_args *);
100 int ntfs_prtactive = 1; /* 1 => print out reclaim of active vnodes */
103 * This is a noop, simply returning what one has been given.
105 * ntfs_bmap(struct vnode *a_vp, off_t a_loffset,
106 * daddr_t *a_doffsetp, int *a_runp, int *a_runb)
109 ntfs_bmap(struct vop_bmap_args *ap)
111 dprintf(("ntfs_bmap: vn: %p, blk: %u\n", ap->a_vp,
112 (u_int32_t)ap->a_loffset));
113 if (ap->a_doffsetp != NULL)
114 *ap->a_doffsetp = ap->a_loffset;
115 if (ap->a_runp != NULL)
117 #if !defined(__NetBSD__)
118 if (ap->a_runb != NULL)
125 * ntfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
126 * struct ucred *a_cred)
129 ntfs_read(struct vop_read_args *ap)
131 struct vnode *vp = ap->a_vp;
132 struct fnode *fp = VTOF(vp);
133 struct ntnode *ip = FTONT(fp);
134 struct uio *uio = ap->a_uio;
135 struct ntfsmount *ntmp = ip->i_mp;
138 int resid, off, toread;
141 dprintf(("ntfs_read: ino: %ju, off: %u resid: %zd, segflg: %d\n",
142 (uintmax_t)ip->i_number, (uint32_t)uio->uio_offset,
143 uio->uio_resid, uio->uio_segflg));
145 dprintf(("ntfs_read: filesize: %ju", (uintmax_t)fp->f_size));
147 /* don't allow reading after end of file */
148 if (uio->uio_offset > fp->f_size)
151 resid = (int)szmin(uio->uio_resid, fp->f_size - uio->uio_offset);
153 dprintf((", resid: %d\n", resid));
157 cn = ntfs_btocn(uio->uio_offset);
158 off = ntfs_btocnoff(uio->uio_offset);
160 toread = min(off + resid, ntfs_cntob(1));
162 error = bread(vp, ntfs_cntodoff(cn), ntfs_cntob(1), &bp);
168 error = uiomovebp(bp, bp->b_data + off, toread - off, uio);
175 resid -= toread - off;
181 #if !defined(__DragonFly__)
187 ntfs_bypass(struct vop_generic_args *ap)
190 dprintf(("ntfs_bypass: %s\n", ap->a_desc->sd_name));
197 * ntfs_getattr(struct vnode *a_vp, struct vattr *a_vap)
200 ntfs_getattr(struct vop_getattr_args *ap)
202 struct vnode *vp = ap->a_vp;
203 struct fnode *fp = VTOF(vp);
204 struct ntnode *ip = FTONT(fp);
205 struct vattr *vap = ap->a_vap;
207 dprintf(("ntfs_getattr: %ju, flags: %d\n", (uintmax_t)ip->i_number,
210 #if defined(__DragonFly__)
211 vap->va_fsid = dev2udev(ip->i_dev);
213 vap->va_fsid = ip->i_dev;
215 vap->va_fileid = ip->i_number;
216 vap->va_mode = ip->i_mp->ntm_mode;
217 vap->va_nlink = ip->i_nlink;
218 vap->va_uid = ip->i_mp->ntm_uid;
219 vap->va_gid = ip->i_mp->ntm_gid;
220 vap->va_rmajor = VNOVAL;
221 vap->va_rminor = VNOVAL;
222 vap->va_size = fp->f_size;
223 vap->va_bytes = fp->f_allocated;
224 vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access);
225 vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write);
226 vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create);
227 vap->va_flags = ip->i_flag;
229 vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps;
230 vap->va_type = vp->v_type;
237 * Last reference to an ntnode. If necessary, write or delete it.
239 * ntfs_inactive(struct vnode *a_vp)
242 ntfs_inactive(struct vop_inactive_args *ap)
244 struct vnode *vp = ap->a_vp;
246 struct ntnode *ip = VTONT(vp);
249 dprintf(("ntfs_inactive: vnode: %p, ntnode: %ju\n", vp, (uintmax_t)ip->i_number));
251 if (ntfs_prtactive && VREFCNT(vp) > 1)
252 vprint("ntfs_inactive: pushing active", vp);
255 * XXX since we don't support any filesystem changes
256 * right now, nothing more needs to be done
262 * Reclaim an fnode/ntnode so that it can be used for other purposes.
264 * ntfs_reclaim(struct vnode *a_vp)
267 ntfs_reclaim(struct vop_reclaim_args *ap)
269 struct vnode *vp = ap->a_vp;
270 struct fnode *fp = VTOF(vp);
271 struct ntnode *ip = FTONT(fp);
274 dprintf(("ntfs_reclaim: vnode: %p, ntnode: %ju\n", vp, (uintmax_t)ip->i_number));
276 if (ntfs_prtactive && VREFCNT(vp) > 1)
277 vprint("ntfs_reclaim: pushing active", vp);
279 if ((error = ntfs_ntget(ip)) != 0)
290 * ntfs_print(struct vnode *a_vp)
293 ntfs_print(struct vop_print_args *ap)
299 * Calculate the logical to physical mapping if not done already,
300 * then call the device strategy routine.
302 * ntfs_strategy(struct vnode *a_vp, struct bio *a_bio)
305 ntfs_strategy(struct vop_strategy_args *ap)
307 struct bio *bio = ap->a_bio;
308 struct buf *bp = bio->bio_buf;
309 struct vnode *vp = ap->a_vp;
310 struct fnode *fp = VTOF(vp);
311 struct ntnode *ip = FTONT(fp);
312 struct ntfsmount *ntmp = ip->i_mp;
318 dprintf(("ntfs_strategy: loffset: %u, doffset: %u\n",
319 (uint32_t)bp->b_loffset, (uint32_t)bio->bio_offset));
321 dprintf(("strategy: bcount: %u flags: 0x%x\n",
322 bp->b_bcount, bp->b_flags));
328 if (bio->bio_offset >= fp->f_size) {
332 toread = min(bp->b_bcount,
333 fp->f_size - bio->bio_offset);
334 dprintf(("ntfs_strategy: toread: %u, fsize: %ju\n",
335 toread, (uintmax_t)fp->f_size));
337 error = ntfs_readattr(ntmp, ip, fp->f_attrtype,
338 fp->f_attrname, bio->bio_offset,
339 toread, bp->b_data, NULL);
342 kprintf("ntfs_strategy: ntfs_readattr failed\n");
344 bp->b_flags |= B_ERROR;
347 bzero(bp->b_data + toread, bp->b_bcount - toread);
351 if (bio->bio_offset + bp->b_bcount >= fp->f_size) {
352 kprintf("ntfs_strategy: CAN'T EXTEND FILE\n");
353 bp->b_error = error = EFBIG;
354 bp->b_flags |= B_ERROR;
356 towrite = min(bp->b_bcount,
357 fp->f_size - bio->bio_offset);
358 dprintf(("ntfs_strategy: towrite: %d, fsize: %ju\n",
359 towrite, (uintmax_t)fp->f_size));
361 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
362 fp->f_attrname, bio->bio_offset,towrite,
363 bp->b_data, &tmp, NULL);
366 kprintf("ntfs_strategy: ntfs_writeattr fail\n");
368 bp->b_flags |= B_ERROR;
373 panic("ntfs: bad b_cmd %d", bp->b_cmd);
380 * ntfs_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
381 * struct ucred *a_cred)
384 ntfs_write(struct vop_write_args *ap)
386 struct vnode *vp = ap->a_vp;
387 struct fnode *fp = VTOF(vp);
388 struct ntnode *ip = FTONT(fp);
389 struct uio *uio = ap->a_uio;
390 struct ntfsmount *ntmp = ip->i_mp;
395 dprintf(("ntfs_write: ino: %ju, off: %u resid: %zd, segflg: %d\n",
396 (uintmax_t)ip->i_number, (uint32_t)uio->uio_offset,
397 uio->uio_resid, uio->uio_segflg));
398 dprintf(("ntfs_write: filesize: %ju ", (uintmax_t)fp->f_size));
400 if (uio->uio_resid + uio->uio_offset > fp->f_size) {
401 kprintf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n");
404 if (uio->uio_offset > fp->f_size)
407 towrite = szmin(uio->uio_resid, fp->f_size - uio->uio_offset);
409 dprintf((", towrite: %zd\n", towrite));
411 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
412 fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio);
415 kprintf("ntfs_write: ntfs_writeattr failed: %d\n", error);
422 * ntfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred)
425 ntfs_access(struct vop_access_args *ap)
427 struct vnode *vp = ap->a_vp;
428 struct ntnode *ip = VTONT(vp);
429 struct ucred *cred = ap->a_cred;
430 mode_t mask, mode = ap->a_mode;
437 dprintf(("ntfs_access: %ju\n", (uintmax_t)ip->i_number));
440 * Disallow write attempts on read-only file systems;
441 * unless the file is a socket, fifo, or a block or
442 * character device resident on the file system.
445 switch ((int)vp->v_type) {
449 if (vp->v_mount->mnt_flag & MNT_RDONLY)
452 if (error = getinoquota(ip))
459 /* Otherwise, user id 0 always gets access. */
460 if (cred->cr_uid == 0)
465 /* Otherwise, check the owner. */
466 if (cred->cr_uid == ip->i_mp->ntm_uid) {
473 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES);
476 /* Otherwise, check the groups. */
477 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
478 if (ip->i_mp->ntm_gid == *gp) {
485 return ((ip->i_mp->ntm_mode&mask) == mask ? 0 : EACCES);
488 /* Otherwise, check everyone else. */
495 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES);
503 * ntfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
508 ntfs_open(struct vop_open_args *ap)
510 return (vop_stdopen(ap));
516 * Update the times on the inode.
518 * ntfs_close(struct vnode *a_vp, int a_fflag)
522 ntfs_close(struct vop_close_args *ap)
525 struct vnode *vp = ap->a_vp;
526 struct ntnode *ip = VTONT(vp);
528 kprintf("ntfs_close: %ju\n", (uintmax_t)ip->i_number);
531 return (vop_stdclose(ap));
535 * ntfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred,
536 * int *a_ncookies, off_t **cookies)
539 ntfs_readdir(struct vop_readdir_args *ap)
541 struct vnode *vp = ap->a_vp;
542 struct fnode *fp = VTOF(vp);
543 struct ntnode *ip = FTONT(fp);
544 struct uio *uio = ap->a_uio;
545 struct ntfsmount *ntmp = ip->i_mp;
548 u_int32_t faked = 0, num, off;
550 char convname[NTFS_MAXFILENAME + 1];
552 dprintf(("ntfs_readdir %ju off: %u resid: %zd\n",
553 (uintmax_t)ip->i_number, (uint32_t)uio->uio_offset,
556 if (uio->uio_offset < 0 || uio->uio_offset > INT_MAX)
558 if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY)) != 0)
562 * uio->uio_offset carries the number of the entry
563 * where we should start returning dirents.
565 * We fake up "." if we're not reading the FS root
566 * and we always fake up "..".
568 * off contains the entry we are starting at,
569 * num increments while we are reading.
572 off = num = uio->uio_offset;
573 faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2;
575 /* Simulate . in every dir except ROOT */
576 if (ip->i_number != NTFS_ROOTINO && num == 0) {
577 if (vop_write_dirent(&error, uio, ip->i_number,
587 /* Simulate .. in every dir including ROOT */
588 if (num == faked - 1) {
589 /* XXX NTFS_ROOTINO seems to be wrong here */
590 if (vop_write_dirent(&error, uio, NTFS_ROOTINO,
601 struct attr_indexentry *iep;
604 * num is the number of the entry we will return,
605 * but ntfs_ntreaddir takes the entry number of the
606 * ntfs directory listing, so subtract the faked
609 error = ntfs_ntreaddir(ntmp, fp, num - faked, &iep);
617 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST);
618 iep = NTFS_NEXTREC(iep, struct attr_indexentry *))
620 if(!ntfs_isnamepermitted(ntmp,iep))
622 for(i=0, j=0; i < iep->ie_fnamelen; i++, j++) {
623 c = NTFS_U28(iep->ie_fname[i]);
625 convname[j++] = (char)(c>>8);
626 convname[j] = (char)c&0xFF;
629 if (vop_write_dirent(&error, uio, iep->ie_number,
630 (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG,
634 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, "
636 ncookies, convname, iep->ie_fnametype,
638 (iep->ie_fflag & NTFS_FFLAG_DIR) ?
650 uio->uio_offset = num;
652 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n",
653 ncookies,(u_int)(uio->uio_offset - off)));
654 dprintf(("ntfs_readdir: off: %u resid: %zd\n",
655 (uint32_t)uio->uio_offset, uio->uio_resid));
657 if (!error && ap->a_ncookies != NULL) {
661 ddprintf(("ntfs_readdir: %d cookies\n",ncookies));
662 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
663 panic("ntfs_readdir: unexpected uio from NFS server");
664 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
669 *ap->a_ncookies = ncookies;
670 *ap->a_cookies = cookies;
674 *ap->a_eofflag = VTONT(vp)->i_size <= uio->uio_offset;
682 * ntfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp,
683 * struct componentname *a_cnp)
686 ntfs_lookup(struct vop_old_lookup_args *ap)
688 struct vnode *dvp = ap->a_dvp;
689 struct ntnode *dip = VTONT(dvp);
690 struct ntfsmount *ntmp = dip->i_mp;
691 struct componentname *cnp = ap->a_cnp;
693 int lockparent = cnp->cn_flags & CNP_LOCKPARENT;
695 int wantparent = cnp->cn_flags & (CNP_LOCKPARENT | CNP_WANTPARENT);
697 dprintf(("ntfs_lookup: \"%.*s\" (%ld bytes) in %ju, lp: %d, wp: %d \n",
698 (int)cnp->cn_namelen, cnp->cn_nameptr, cnp->cn_namelen,
699 (uintmax_t)dip->i_number, lockparent, wantparent));
703 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
704 dprintf(("ntfs_lookup: faking . directory in %u\n",
705 (uint32_t)dip->i_number));
710 } else if (cnp->cn_flags & CNP_ISDOTDOT) {
713 dprintf(("ntfs_lookup: faking .. directory in %d\n",
714 (uint32_t)dip->i_number));
716 error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap);
721 cnp->cn_flags |= CNP_PDIRUNLOCK;
723 dprintf(("ntfs_lookup: parentdir: %d\n",
724 vap->va_a_name->n_pnumber));
725 error = VFS_VGET(ntmp->ntm_mountp, NULL,
726 vap->va_a_name->n_pnumber,ap->a_vpp);
727 ntfs_ntvattrrele(vap);
729 if (VN_LOCK(dvp, LK_EXCLUSIVE | LK_RETRY) == 0)
730 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
735 error = VN_LOCK(dvp, LK_EXCLUSIVE);
741 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
744 error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp);
746 dprintf(("ntfs_ntlookupfile: returned %d\n", error));
750 dprintf(("ntfs_lookup: found ino: %u\n",
751 (uint32_t)VTONT(*ap->a_vpp)->i_number));
755 cnp->cn_flags |= CNP_PDIRUNLOCK;
761 #if defined(__DragonFly__)
763 * Flush the blocks of a file to disk.
765 * This function is worthless for vnodes that represent directories. Maybe we
766 * could just do a sync if they try an fsync on a directory file.
768 * ntfs_fsync(struct vnode *a_vp, int a_waitfor)
771 ntfs_fsync(struct vop_fsync_args *ap)
778 * Return POSIX pathconf information applicable to NTFS filesystem
781 ntfs_pathconf(struct vop_pathconf_args *ap)
783 switch (ap->a_name) {
788 *ap->a_retval = NTFS_MAXFILENAME;
791 *ap->a_retval = PATH_MAX;
793 case _PC_CHOWN_RESTRICTED:
799 #if defined(__NetBSD__)
803 case _PC_FILESIZEBITS:
814 * Global vfs data structures
816 struct vop_ops ntfs_vnode_vops = {
817 .vop_default = vop_defaultop,
818 .vop_getattr = ntfs_getattr,
819 .vop_inactive = ntfs_inactive,
820 .vop_reclaim = ntfs_reclaim,
821 .vop_print = ntfs_print,
822 .vop_pathconf = ntfs_pathconf,
823 .vop_old_lookup = ntfs_lookup,
824 .vop_access = ntfs_access,
825 .vop_close = ntfs_close,
826 .vop_open = ntfs_open,
827 .vop_readdir = ntfs_readdir,
828 .vop_fsync = ntfs_fsync,
829 .vop_bmap = ntfs_bmap,
830 .vop_getpages = vop_stdgetpages,
831 .vop_putpages = vop_stdputpages,
832 .vop_strategy = ntfs_strategy,
833 .vop_read = ntfs_read,
834 .vop_write = ntfs_write