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 1.37 2006/08/19 17:27:24 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_getpages (struct vop_getpages_args *ap);
99 static int ntfs_putpages (struct vop_putpages_args *);
100 static int ntfs_fsync (struct vop_fsync_args *ap);
102 static int ntfs_bypass (struct vop_generic_args *);
104 static int ntfs_pathconf (struct vop_pathconf_args *);
106 int ntfs_prtactive = 1; /* 1 => print out reclaim of active vnodes */
108 #if defined(__DragonFly__)
110 ntfs_getpages(struct vop_getpages_args *ap)
112 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
117 ntfs_putpages(struct vop_putpages_args *ap)
119 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
120 ap->a_sync, ap->a_rtvals);
125 * This is a noop, simply returning what one has been given.
127 * ntfs_bmap(struct vnode *a_vp, off_t a_loffset, struct vnode **a_vpp,
128 * daddr_t *a_doffsetp, int *a_runp, int *a_runb)
131 ntfs_bmap(struct vop_bmap_args *ap)
133 dprintf(("ntfs_bmap: vn: %p, blk: %d\n", ap->a_vp,(u_int32_t)ap->a_bn));
134 if (ap->a_vpp != NULL)
135 *ap->a_vpp = ap->a_vp;
136 if (ap->a_doffsetp != NULL)
137 *ap->a_doffsetp = ap->a_loffset;
138 if (ap->a_runp != NULL)
140 #if !defined(__NetBSD__)
141 if (ap->a_runb != NULL)
148 * ntfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
149 * struct ucred *a_cred)
152 ntfs_read(struct vop_read_args *ap)
154 struct vnode *vp = ap->a_vp;
155 struct fnode *fp = VTOF(vp);
156 struct ntnode *ip = FTONT(fp);
157 struct uio *uio = ap->a_uio;
158 struct ntfsmount *ntmp = ip->i_mp;
161 int resid, off, toread;
164 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));
166 dprintf(("ntfs_read: filesize: %d",(u_int32_t)fp->f_size));
168 /* don't allow reading after end of file */
169 if (uio->uio_offset > fp->f_size)
172 resid = min(uio->uio_resid, fp->f_size - uio->uio_offset);
174 dprintf((", resid: %d\n", resid));
178 cn = ntfs_btocn(uio->uio_offset);
179 off = ntfs_btocnoff(uio->uio_offset);
181 toread = min(off + resid, ntfs_cntob(1));
183 error = bread(vp, ntfs_cntodoff(cn), ntfs_cntob(1), &bp);
189 error = uiomove(bp->b_data + off, toread - off, uio);
196 resid -= toread - off;
202 #if !defined(__DragonFly__)
208 ntfs_bypass(struct vop_generic_args *ap)
211 dprintf(("ntfs_bypass: %s\n", ap->a_desc->sd_name));
218 * ntfs_getattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred,
219 * struct thread *a_td)
222 ntfs_getattr(struct vop_getattr_args *ap)
224 struct vnode *vp = ap->a_vp;
225 struct fnode *fp = VTOF(vp);
226 struct ntnode *ip = FTONT(fp);
227 struct vattr *vap = ap->a_vap;
229 dprintf(("ntfs_getattr: %d, flags: %d\n",ip->i_number,ip->i_flag));
231 #if defined(__DragonFly__)
232 vap->va_fsid = dev2udev(ip->i_dev);
234 vap->va_fsid = ip->i_dev;
236 vap->va_fileid = ip->i_number;
237 vap->va_mode = ip->i_mp->ntm_mode;
238 vap->va_nlink = ip->i_nlink;
239 vap->va_uid = ip->i_mp->ntm_uid;
240 vap->va_gid = ip->i_mp->ntm_gid;
241 vap->va_rdev = 0; /* XXX UNODEV ? */
242 vap->va_size = fp->f_size;
243 vap->va_bytes = fp->f_allocated;
244 vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access);
245 vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write);
246 vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create);
247 vap->va_flags = ip->i_flag;
249 vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps;
250 vap->va_type = vp->v_type;
257 * Last reference to an ntnode. If necessary, write or delete it.
259 * ntfs_inactive(struct vnode *a_vp)
262 ntfs_inactive(struct vop_inactive_args *ap)
264 struct vnode *vp = ap->a_vp;
266 struct ntnode *ip = VTONT(vp);
269 dprintf(("ntfs_inactive: vnode: %p, ntnode: %d\n", vp, ip->i_number));
271 if (ntfs_prtactive && vp->v_usecount != 1)
272 vprint("ntfs_inactive: pushing active", vp);
275 * XXX since we don't support any filesystem changes
276 * right now, nothing more needs to be done
282 * Reclaim an fnode/ntnode so that it can be used for other purposes.
284 * ntfs_reclaim(struct vnode *a_vp)
287 ntfs_reclaim(struct vop_reclaim_args *ap)
289 struct vnode *vp = ap->a_vp;
290 struct fnode *fp = VTOF(vp);
291 struct ntnode *ip = FTONT(fp);
294 dprintf(("ntfs_reclaim: vnode: %p, ntnode: %d\n", vp, ip->i_number));
296 if (ntfs_prtactive && vp->v_usecount != 1)
297 vprint("ntfs_reclaim: pushing active", vp);
299 if ((error = ntfs_ntget(ip)) != 0)
310 * ntfs_print(struct vnode *a_vp)
313 ntfs_print(struct vop_print_args *ap)
319 * Calculate the logical to physical mapping if not done already,
320 * then call the device strategy routine.
322 * ntfs_strategy(struct vnode *a_vp, struct bio *a_bio)
325 ntfs_strategy(struct vop_strategy_args *ap)
327 struct bio *bio = ap->a_bio;
328 struct buf *bp = bio->bio_buf;
329 struct vnode *vp = ap->a_vp;
330 struct fnode *fp = VTOF(vp);
331 struct ntnode *ip = FTONT(fp);
332 struct ntfsmount *ntmp = ip->i_mp;
338 dprintf(("ntfs_strategy: loffset: %lld, doffset: %lld\n",
339 bp->b_loffset, bio->bio_offset));
341 dprintf(("strategy: bcount: %d flags: 0x%lx\n",
342 (u_int32_t)bp->b_bcount,bp->b_flags));
348 if (bio->bio_offset >= fp->f_size) {
352 toread = min(bp->b_bcount,
353 fp->f_size - bio->bio_offset);
354 dprintf(("ntfs_strategy: toread: %d, fsize: %d\n",
355 toread,(u_int32_t)fp->f_size));
357 error = ntfs_readattr(ntmp, ip, fp->f_attrtype,
358 fp->f_attrname, bio->bio_offset,
359 toread, bp->b_data, NULL);
362 printf("ntfs_strategy: ntfs_readattr failed\n");
364 bp->b_flags |= B_ERROR;
367 bzero(bp->b_data + toread, bp->b_bcount - toread);
371 if (bio->bio_offset + bp->b_bcount >= fp->f_size) {
372 printf("ntfs_strategy: CAN'T EXTEND FILE\n");
373 bp->b_error = error = EFBIG;
374 bp->b_flags |= B_ERROR;
376 towrite = min(bp->b_bcount,
377 fp->f_size - bio->bio_offset);
378 dprintf(("ntfs_strategy: towrite: %d, fsize: %d\n",
379 towrite,(u_int32_t)fp->f_size));
381 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
382 fp->f_attrname, bio->bio_offset,towrite,
383 bp->b_data, &tmp, NULL);
386 printf("ntfs_strategy: ntfs_writeattr fail\n");
388 bp->b_flags |= B_ERROR;
393 panic("ntfs: bad b_cmd %d\n", bp->b_cmd);
400 * ntfs_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
401 * struct ucred *a_cred)
404 ntfs_write(struct vop_write_args *ap)
406 struct vnode *vp = ap->a_vp;
407 struct fnode *fp = VTOF(vp);
408 struct ntnode *ip = FTONT(fp);
409 struct uio *uio = ap->a_uio;
410 struct ntfsmount *ntmp = ip->i_mp;
415 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));
416 dprintf(("ntfs_write: filesize: %d",(u_int32_t)fp->f_size));
418 if (uio->uio_resid + uio->uio_offset > fp->f_size) {
419 printf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n");
423 towrite = min(uio->uio_resid, fp->f_size - uio->uio_offset);
425 dprintf((", towrite: %d\n",(u_int32_t)towrite));
427 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
428 fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio);
431 printf("ntfs_write: ntfs_writeattr failed: %d\n", error);
438 * ntfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
439 * struct thread *a_td)
442 ntfs_access(struct vop_access_args *ap)
444 struct vnode *vp = ap->a_vp;
445 struct ntnode *ip = VTONT(vp);
446 struct ucred *cred = ap->a_cred;
447 mode_t mask, mode = ap->a_mode;
454 dprintf(("ntfs_access: %d\n",ip->i_number));
457 * Disallow write attempts on read-only file systems;
458 * unless the file is a socket, fifo, or a block or
459 * character device resident on the file system.
462 switch ((int)vp->v_type) {
466 if (vp->v_mount->mnt_flag & MNT_RDONLY)
469 if (error = getinoquota(ip))
476 /* Otherwise, user id 0 always gets access. */
477 if (cred->cr_uid == 0)
482 /* Otherwise, check the owner. */
483 if (cred->cr_uid == ip->i_mp->ntm_uid) {
490 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES);
493 /* Otherwise, check the groups. */
494 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
495 if (ip->i_mp->ntm_gid == *gp) {
502 return ((ip->i_mp->ntm_mode&mask) == mask ? 0 : EACCES);
505 /* Otherwise, check everyone else. */
512 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES);
520 * ntfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
521 * struct thread *a_td)
525 ntfs_open(struct vop_open_args *ap)
527 return (vop_stdopen(ap));
533 * Update the times on the inode.
535 * ntfs_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred,
536 * struct thread *a_td)
540 ntfs_close(struct vop_close_args *ap)
543 struct vnode *vp = ap->a_vp;
544 struct ntnode *ip = VTONT(vp);
546 printf("ntfs_close: %d\n",ip->i_number);
549 return (vop_stdclose(ap));
553 * ntfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred,
554 * int *a_ncookies, u_int **cookies)
557 ntfs_readdir(struct vop_readdir_args *ap)
559 struct vnode *vp = ap->a_vp;
560 struct fnode *fp = VTOF(vp);
561 struct ntnode *ip = FTONT(fp);
562 struct uio *uio = ap->a_uio;
563 struct ntfsmount *ntmp = ip->i_mp;
565 u_int32_t faked = 0, num, off;
567 char convname[NTFS_MAXFILENAME + 1];
569 dprintf(("ntfs_readdir %d off: %d resid: %d\n",ip->i_number,(u_int32_t)uio->uio_offset,uio->uio_resid));
571 if (uio->uio_offset < 0 || uio->uio_offset > INT_MAX)
573 if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY)) != 0)
577 * uio->uio_offset carries the number of the entry
578 * where we should start returning dirents.
580 * We fake up "." if we're not reading the FS root
581 * and we always fake up "..".
583 * off contains the entry we are starting at,
584 * num increments while we are reading.
587 off = num = uio->uio_offset;
588 faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2;
590 /* Simulate . in every dir except ROOT */
591 if (ip->i_number != NTFS_ROOTINO && num == 0) {
592 if (vop_write_dirent(&error, uio, ip->i_number,
602 /* Simulate .. in every dir including ROOT */
603 if (num == faked - 1) {
604 /* XXX NTFS_ROOTINO seems to be wrong here */
605 if (vop_write_dirent(&error, uio, NTFS_ROOTINO,
616 struct attr_indexentry *iep;
619 * num is the number of the entry we will return,
620 * but ntfs_ntreaddir takes the entry number of the
621 * ntfs directory listing, so subtract the faked
624 error = ntfs_ntreaddir(ntmp, fp, num - faked, &iep);
632 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST);
633 iep = NTFS_NEXTREC(iep, struct attr_indexentry *))
635 if(!ntfs_isnamepermitted(ntmp,iep))
638 for (i=0; i < iep->ie_fnamelen; i++)
639 convname[i] = NTFS_U28(iep->ie_fname[i]);
642 if (vop_write_dirent(&error, uio, iep->ie_number,
643 (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG,
644 iep->ie_fnamelen, convname))
647 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, "
649 ncookies, convname, iep->ie_fnametype,
651 (iep->ie_fflag & NTFS_FFLAG_DIR) ?
663 uio->uio_offset = num;
665 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n",
666 ncookies,(u_int)(uio->uio_offset - off)));
667 dprintf(("ntfs_readdir: off: %d resid: %d\n",
668 (u_int32_t)uio->uio_offset,uio->uio_resid));
670 if (!error && ap->a_ncookies != NULL) {
671 #if defined(__DragonFly__)
674 #else /* defined(__NetBSD__) */
679 ddprintf(("ntfs_readdir: %d cookies\n",ncookies));
680 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
681 panic("ntfs_readdir: unexpected uio from NFS server");
682 #if defined(__DragonFly__)
683 MALLOC(cookies, u_long *, ncookies * sizeof(u_long),
685 #else /* defined(__NetBSD__) */
686 MALLOC(cookies, off_t *, ncookies * sizeof(off_t),
693 *ap->a_ncookies = ncookies;
694 *ap->a_cookies = cookies;
698 *ap->a_eofflag = VTONT(vp)->i_size <= uio->uio_offset;
706 * ntfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp,
707 * struct componentname *a_cnp)
710 ntfs_lookup(struct vop_old_lookup_args *ap)
712 struct vnode *dvp = ap->a_dvp;
713 struct ntnode *dip = VTONT(dvp);
714 struct ntfsmount *ntmp = dip->i_mp;
715 struct componentname *cnp = ap->a_cnp;
717 int lockparent = cnp->cn_flags & CNP_LOCKPARENT;
719 int wantparent = cnp->cn_flags & (CNP_LOCKPARENT | CNP_WANTPARENT);
721 dprintf(("ntfs_lookup: \"%.*s\" (%ld bytes) in %d, lp: %d, wp: %d \n",
722 (int)cnp->cn_namelen, cnp->cn_nameptr, cnp->cn_namelen,
723 dip->i_number, lockparent, wantparent));
727 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
728 dprintf(("ntfs_lookup: faking . directory in %d\n",
734 } else if (cnp->cn_flags & CNP_ISDOTDOT) {
737 dprintf(("ntfs_lookup: faking .. directory in %d\n",
740 error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap);
745 cnp->cn_flags |= CNP_PDIRUNLOCK;
747 dprintf(("ntfs_lookup: parentdir: %d\n",
748 vap->va_a_name->n_pnumber));
749 error = VFS_VGET(ntmp->ntm_mountp,
750 vap->va_a_name->n_pnumber,ap->a_vpp);
751 ntfs_ntvattrrele(vap);
753 if (VN_LOCK(dvp, LK_EXCLUSIVE | LK_RETRY) == 0)
754 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
759 error = VN_LOCK(dvp, LK_EXCLUSIVE);
765 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
768 error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp);
770 dprintf(("ntfs_ntlookupfile: returned %d\n", error));
774 dprintf(("ntfs_lookup: found ino: %d\n",
775 VTONT(*ap->a_vpp)->i_number));
783 #if defined(__DragonFly__)
785 * Flush the blocks of a file to disk.
787 * This function is worthless for vnodes that represent directories. Maybe we
788 * could just do a sync if they try an fsync on a directory file.
790 * ntfs_fsync(struct vnode *a_vp, struct ucred *a_cred, int a_waitfor,
791 * struct thread *a_td)
794 ntfs_fsync(struct vop_fsync_args *ap)
801 * Return POSIX pathconf information applicable to NTFS filesystem
804 ntfs_pathconf(struct vop_pathconf_args *ap)
806 switch (ap->a_name) {
811 *ap->a_retval = NTFS_MAXFILENAME;
814 *ap->a_retval = PATH_MAX;
816 case _PC_CHOWN_RESTRICTED:
822 #if defined(__NetBSD__)
826 case _PC_FILESIZEBITS:
837 * Global vfs data structures
839 struct vop_ops ntfs_vnode_vops = {
840 .vop_default = vop_defaultop,
841 .vop_getattr = ntfs_getattr,
842 .vop_inactive = ntfs_inactive,
843 .vop_reclaim = ntfs_reclaim,
844 .vop_print = ntfs_print,
845 .vop_pathconf = ntfs_pathconf,
846 .vop_old_lookup = ntfs_lookup,
847 .vop_access = ntfs_access,
848 .vop_close = ntfs_close,
849 .vop_open = ntfs_open,
850 .vop_readdir = ntfs_readdir,
851 .vop_fsync = ntfs_fsync,
852 .vop_bmap = ntfs_bmap,
853 .vop_getpages = ntfs_getpages,
854 .vop_putpages = ntfs_putpages,
855 .vop_strategy = ntfs_strategy,
856 .vop_read = ntfs_read,
857 .vop_write = ntfs_write