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. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * $FreeBSD: src/sys/ntfs/ntfs_vnops.c,v 1.9.2.4 2002/08/06 19:35:18 semenu Exp $
39 * $DragonFly: src/sys/vfs/ntfs/ntfs_vnops.c,v 1.44 2007/11/20 21:03:50 dillon Exp $
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/kernel.h>
47 #include <sys/types.h>
49 #include <sys/vnode.h>
50 #include <sys/mount.h>
52 #include <sys/namei.h>
53 #include <sys/malloc.h>
55 #include <sys/dirent.h>
56 #include <machine/limits.h>
59 #include <vm/vm_param.h>
60 #if defined(__NetBSD__)
61 #include <vm/vm_prot.h>
63 #include <vm/vm_page.h>
64 #include <vm/vm_object.h>
65 #include <vm/vm_pager.h>
66 #if defined(__DragonFly__)
67 #include <vm/vnode_pager.h>
69 #include <vm/vm_extern.h>
71 #include <sys/sysctl.h>
73 /*#define NTFS_DEBUG 1*/
75 #include "ntfs_inode.h"
76 #include "ntfs_subr.h"
77 #if defined(__NetBSD__)
78 #include <miscfs/specfs/specdev.h>
79 #include <miscfs/genfs/genfs.h>
82 #include <sys/unistd.h> /* for pathconf(2) constants */
84 static int ntfs_read (struct vop_read_args *);
85 static int ntfs_write (struct vop_write_args *ap);
86 static int ntfs_getattr (struct vop_getattr_args *ap);
87 static int ntfs_inactive (struct vop_inactive_args *ap);
88 static int ntfs_print (struct vop_print_args *ap);
89 static int ntfs_reclaim (struct vop_reclaim_args *ap);
90 static int ntfs_strategy (struct vop_strategy_args *ap);
91 static int ntfs_access (struct vop_access_args *ap);
92 static int ntfs_open (struct vop_open_args *ap);
93 static int ntfs_close (struct vop_close_args *ap);
94 static int ntfs_readdir (struct vop_readdir_args *ap);
95 static int ntfs_lookup (struct vop_old_lookup_args *ap);
96 static int ntfs_bmap (struct vop_bmap_args *ap);
97 #if defined(__DragonFly__)
98 static int ntfs_fsync (struct vop_fsync_args *ap);
100 static int ntfs_bypass (struct vop_generic_args *);
102 static int ntfs_pathconf (struct vop_pathconf_args *);
104 int ntfs_prtactive = 1; /* 1 => print out reclaim of active vnodes */
107 * This is a noop, simply returning what one has been given.
109 * ntfs_bmap(struct vnode *a_vp, off_t a_loffset,
110 * daddr_t *a_doffsetp, int *a_runp, int *a_runb)
113 ntfs_bmap(struct vop_bmap_args *ap)
115 dprintf(("ntfs_bmap: vn: %p, blk: %d\n", ap->a_vp,(u_int32_t)ap->a_bn));
116 if (ap->a_doffsetp != NULL)
117 *ap->a_doffsetp = ap->a_loffset;
118 if (ap->a_runp != NULL)
120 #if !defined(__NetBSD__)
121 if (ap->a_runb != NULL)
128 * ntfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
129 * struct ucred *a_cred)
132 ntfs_read(struct vop_read_args *ap)
134 struct vnode *vp = ap->a_vp;
135 struct fnode *fp = VTOF(vp);
136 struct ntnode *ip = FTONT(fp);
137 struct uio *uio = ap->a_uio;
138 struct ntfsmount *ntmp = ip->i_mp;
141 int resid, off, toread;
144 dprintf(("ntfs_read: ino: %d, off: %d resid: %d, segflg: %d\n",ip->i_number,(u_int32_t)uio->uio_offset,uio->uio_resid,uio->uio_segflg));
146 dprintf(("ntfs_read: filesize: %d",(u_int32_t)fp->f_size));
148 /* don't allow reading after end of file */
149 if (uio->uio_offset > fp->f_size)
152 resid = min(uio->uio_resid, fp->f_size - uio->uio_offset);
154 dprintf((", resid: %d\n", resid));
158 cn = ntfs_btocn(uio->uio_offset);
159 off = ntfs_btocnoff(uio->uio_offset);
161 toread = min(off + resid, ntfs_cntob(1));
163 error = bread(vp, ntfs_cntodoff(cn), ntfs_cntob(1), &bp);
169 error = uiomove(bp->b_data + off, toread - off, uio);
176 resid -= toread - off;
182 #if !defined(__DragonFly__)
188 ntfs_bypass(struct vop_generic_args *ap)
191 dprintf(("ntfs_bypass: %s\n", ap->a_desc->sd_name));
198 * ntfs_getattr(struct vnode *a_vp, struct vattr *a_vap)
201 ntfs_getattr(struct vop_getattr_args *ap)
203 struct vnode *vp = ap->a_vp;
204 struct fnode *fp = VTOF(vp);
205 struct ntnode *ip = FTONT(fp);
206 struct vattr *vap = ap->a_vap;
208 dprintf(("ntfs_getattr: %d, flags: %d\n",ip->i_number,ip->i_flag));
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: %d\n", vp, ip->i_number));
251 if (ntfs_prtactive && vp->v_sysref.refcnt > 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: %d\n", vp, ip->i_number));
276 if (ntfs_prtactive && vp->v_sysref.refcnt > 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: %lld, doffset: %lld\n",
319 bp->b_loffset, bio->bio_offset));
321 dprintf(("strategy: bcount: %d flags: 0x%lx\n",
322 (u_int32_t)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: %d, fsize: %d\n",
335 toread,(u_int32_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: %d\n",
359 towrite,(u_int32_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\n", 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: %d, off: %d resid: %d, segflg: %d\n",ip->i_number,(u_int32_t)uio->uio_offset,uio->uio_resid,uio->uio_segflg));
396 dprintf(("ntfs_write: filesize: %d",(u_int32_t)fp->f_size));
398 if (uio->uio_resid + uio->uio_offset > fp->f_size) {
399 kprintf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n");
403 towrite = min(uio->uio_resid, fp->f_size - uio->uio_offset);
405 dprintf((", towrite: %d\n",(u_int32_t)towrite));
407 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
408 fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio);
411 kprintf("ntfs_write: ntfs_writeattr failed: %d\n", error);
418 * ntfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred)
421 ntfs_access(struct vop_access_args *ap)
423 struct vnode *vp = ap->a_vp;
424 struct ntnode *ip = VTONT(vp);
425 struct ucred *cred = ap->a_cred;
426 mode_t mask, mode = ap->a_mode;
433 dprintf(("ntfs_access: %d\n",ip->i_number));
436 * Disallow write attempts on read-only file systems;
437 * unless the file is a socket, fifo, or a block or
438 * character device resident on the file system.
441 switch ((int)vp->v_type) {
445 if (vp->v_mount->mnt_flag & MNT_RDONLY)
448 if (error = getinoquota(ip))
455 /* Otherwise, user id 0 always gets access. */
456 if (cred->cr_uid == 0)
461 /* Otherwise, check the owner. */
462 if (cred->cr_uid == ip->i_mp->ntm_uid) {
469 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES);
472 /* Otherwise, check the groups. */
473 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
474 if (ip->i_mp->ntm_gid == *gp) {
481 return ((ip->i_mp->ntm_mode&mask) == mask ? 0 : EACCES);
484 /* Otherwise, check everyone else. */
491 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES);
499 * ntfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
504 ntfs_open(struct vop_open_args *ap)
506 return (vop_stdopen(ap));
512 * Update the times on the inode.
514 * ntfs_close(struct vnode *a_vp, int a_fflag)
518 ntfs_close(struct vop_close_args *ap)
521 struct vnode *vp = ap->a_vp;
522 struct ntnode *ip = VTONT(vp);
524 kprintf("ntfs_close: %d\n",ip->i_number);
527 return (vop_stdclose(ap));
531 * ntfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred,
532 * int *a_ncookies, off_t **cookies)
535 ntfs_readdir(struct vop_readdir_args *ap)
537 struct vnode *vp = ap->a_vp;
538 struct fnode *fp = VTOF(vp);
539 struct ntnode *ip = FTONT(fp);
540 struct uio *uio = ap->a_uio;
541 struct ntfsmount *ntmp = ip->i_mp;
543 u_int32_t faked = 0, num, off;
545 char convname[NTFS_MAXFILENAME + 1];
547 dprintf(("ntfs_readdir %d off: %d resid: %d\n",ip->i_number,(u_int32_t)uio->uio_offset,uio->uio_resid));
549 if (uio->uio_offset < 0 || uio->uio_offset > INT_MAX)
551 if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY)) != 0)
555 * uio->uio_offset carries the number of the entry
556 * where we should start returning dirents.
558 * We fake up "." if we're not reading the FS root
559 * and we always fake up "..".
561 * off contains the entry we are starting at,
562 * num increments while we are reading.
565 off = num = uio->uio_offset;
566 faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2;
568 /* Simulate . in every dir except ROOT */
569 if (ip->i_number != NTFS_ROOTINO && num == 0) {
570 if (vop_write_dirent(&error, uio, ip->i_number,
580 /* Simulate .. in every dir including ROOT */
581 if (num == faked - 1) {
582 /* XXX NTFS_ROOTINO seems to be wrong here */
583 if (vop_write_dirent(&error, uio, NTFS_ROOTINO,
594 struct attr_indexentry *iep;
597 * num is the number of the entry we will return,
598 * but ntfs_ntreaddir takes the entry number of the
599 * ntfs directory listing, so subtract the faked
602 error = ntfs_ntreaddir(ntmp, fp, num - faked, &iep);
610 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST);
611 iep = NTFS_NEXTREC(iep, struct attr_indexentry *))
613 if(!ntfs_isnamepermitted(ntmp,iep))
616 for (i=0; i < iep->ie_fnamelen; i++)
617 convname[i] = NTFS_U28(iep->ie_fname[i]);
620 if (vop_write_dirent(&error, uio, iep->ie_number,
621 (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG,
622 iep->ie_fnamelen, convname))
625 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, "
627 ncookies, convname, iep->ie_fnametype,
629 (iep->ie_fflag & NTFS_FFLAG_DIR) ?
641 uio->uio_offset = num;
643 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n",
644 ncookies,(u_int)(uio->uio_offset - off)));
645 dprintf(("ntfs_readdir: off: %d resid: %d\n",
646 (u_int32_t)uio->uio_offset,uio->uio_resid));
648 if (!error && ap->a_ncookies != NULL) {
652 ddprintf(("ntfs_readdir: %d cookies\n",ncookies));
653 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
654 panic("ntfs_readdir: unexpected uio from NFS server");
655 MALLOC(cookies, off_t *, ncookies * sizeof(off_t),
661 *ap->a_ncookies = ncookies;
662 *ap->a_cookies = cookies;
666 *ap->a_eofflag = VTONT(vp)->i_size <= uio->uio_offset;
674 * ntfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp,
675 * struct componentname *a_cnp)
678 ntfs_lookup(struct vop_old_lookup_args *ap)
680 struct vnode *dvp = ap->a_dvp;
681 struct ntnode *dip = VTONT(dvp);
682 struct ntfsmount *ntmp = dip->i_mp;
683 struct componentname *cnp = ap->a_cnp;
685 int lockparent = cnp->cn_flags & CNP_LOCKPARENT;
687 int wantparent = cnp->cn_flags & (CNP_LOCKPARENT | CNP_WANTPARENT);
689 dprintf(("ntfs_lookup: \"%.*s\" (%ld bytes) in %d, lp: %d, wp: %d \n",
690 (int)cnp->cn_namelen, cnp->cn_nameptr, cnp->cn_namelen,
691 dip->i_number, lockparent, wantparent));
695 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
696 dprintf(("ntfs_lookup: faking . directory in %d\n",
702 } else if (cnp->cn_flags & CNP_ISDOTDOT) {
705 dprintf(("ntfs_lookup: faking .. directory in %d\n",
708 error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap);
713 cnp->cn_flags |= CNP_PDIRUNLOCK;
715 dprintf(("ntfs_lookup: parentdir: %d\n",
716 vap->va_a_name->n_pnumber));
717 error = VFS_VGET(ntmp->ntm_mountp,
718 vap->va_a_name->n_pnumber,ap->a_vpp);
719 ntfs_ntvattrrele(vap);
721 if (VN_LOCK(dvp, LK_EXCLUSIVE | LK_RETRY) == 0)
722 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
727 error = VN_LOCK(dvp, LK_EXCLUSIVE);
733 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
736 error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp);
738 dprintf(("ntfs_ntlookupfile: returned %d\n", error));
742 dprintf(("ntfs_lookup: found ino: %d\n",
743 VTONT(*ap->a_vpp)->i_number));
751 #if defined(__DragonFly__)
753 * Flush the blocks of a file to disk.
755 * This function is worthless for vnodes that represent directories. Maybe we
756 * could just do a sync if they try an fsync on a directory file.
758 * ntfs_fsync(struct vnode *a_vp, int a_waitfor)
761 ntfs_fsync(struct vop_fsync_args *ap)
768 * Return POSIX pathconf information applicable to NTFS filesystem
771 ntfs_pathconf(struct vop_pathconf_args *ap)
773 switch (ap->a_name) {
778 *ap->a_retval = NTFS_MAXFILENAME;
781 *ap->a_retval = PATH_MAX;
783 case _PC_CHOWN_RESTRICTED:
789 #if defined(__NetBSD__)
793 case _PC_FILESIZEBITS:
804 * Global vfs data structures
806 struct vop_ops ntfs_vnode_vops = {
807 .vop_default = vop_defaultop,
808 .vop_getattr = ntfs_getattr,
809 .vop_inactive = ntfs_inactive,
810 .vop_reclaim = ntfs_reclaim,
811 .vop_print = ntfs_print,
812 .vop_pathconf = ntfs_pathconf,
813 .vop_old_lookup = ntfs_lookup,
814 .vop_access = ntfs_access,
815 .vop_close = ntfs_close,
816 .vop_open = ntfs_open,
817 .vop_readdir = ntfs_readdir,
818 .vop_fsync = ntfs_fsync,
819 .vop_bmap = ntfs_bmap,
820 .vop_getpages = vop_stdgetpages,
821 .vop_putpages = vop_stdputpages,
822 .vop_strategy = ntfs_strategy,
823 .vop_read = ntfs_read,
824 .vop_write = ntfs_write