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 1.40 2007/05/09 00:53:36 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_rmajor = VNOVAL;
242 vap->va_rminor = VNOVAL;
243 vap->va_size = fp->f_size;
244 vap->va_bytes = fp->f_allocated;
245 vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access);
246 vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write);
247 vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create);
248 vap->va_flags = ip->i_flag;
250 vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps;
251 vap->va_type = vp->v_type;
258 * Last reference to an ntnode. If necessary, write or delete it.
260 * ntfs_inactive(struct vnode *a_vp)
263 ntfs_inactive(struct vop_inactive_args *ap)
265 struct vnode *vp = ap->a_vp;
267 struct ntnode *ip = VTONT(vp);
270 dprintf(("ntfs_inactive: vnode: %p, ntnode: %d\n", vp, ip->i_number));
272 if (ntfs_prtactive && vp->v_sysref.refcnt > 1)
273 vprint("ntfs_inactive: pushing active", vp);
276 * XXX since we don't support any filesystem changes
277 * right now, nothing more needs to be done
283 * Reclaim an fnode/ntnode so that it can be used for other purposes.
285 * ntfs_reclaim(struct vnode *a_vp)
288 ntfs_reclaim(struct vop_reclaim_args *ap)
290 struct vnode *vp = ap->a_vp;
291 struct fnode *fp = VTOF(vp);
292 struct ntnode *ip = FTONT(fp);
295 dprintf(("ntfs_reclaim: vnode: %p, ntnode: %d\n", vp, ip->i_number));
297 if (ntfs_prtactive && vp->v_sysref.refcnt > 1)
298 vprint("ntfs_reclaim: pushing active", vp);
300 if ((error = ntfs_ntget(ip)) != 0)
311 * ntfs_print(struct vnode *a_vp)
314 ntfs_print(struct vop_print_args *ap)
320 * Calculate the logical to physical mapping if not done already,
321 * then call the device strategy routine.
323 * ntfs_strategy(struct vnode *a_vp, struct bio *a_bio)
326 ntfs_strategy(struct vop_strategy_args *ap)
328 struct bio *bio = ap->a_bio;
329 struct buf *bp = bio->bio_buf;
330 struct vnode *vp = ap->a_vp;
331 struct fnode *fp = VTOF(vp);
332 struct ntnode *ip = FTONT(fp);
333 struct ntfsmount *ntmp = ip->i_mp;
339 dprintf(("ntfs_strategy: loffset: %lld, doffset: %lld\n",
340 bp->b_loffset, bio->bio_offset));
342 dprintf(("strategy: bcount: %d flags: 0x%lx\n",
343 (u_int32_t)bp->b_bcount,bp->b_flags));
349 if (bio->bio_offset >= fp->f_size) {
353 toread = min(bp->b_bcount,
354 fp->f_size - bio->bio_offset);
355 dprintf(("ntfs_strategy: toread: %d, fsize: %d\n",
356 toread,(u_int32_t)fp->f_size));
358 error = ntfs_readattr(ntmp, ip, fp->f_attrtype,
359 fp->f_attrname, bio->bio_offset,
360 toread, bp->b_data, NULL);
363 kprintf("ntfs_strategy: ntfs_readattr failed\n");
365 bp->b_flags |= B_ERROR;
368 bzero(bp->b_data + toread, bp->b_bcount - toread);
372 if (bio->bio_offset + bp->b_bcount >= fp->f_size) {
373 kprintf("ntfs_strategy: CAN'T EXTEND FILE\n");
374 bp->b_error = error = EFBIG;
375 bp->b_flags |= B_ERROR;
377 towrite = min(bp->b_bcount,
378 fp->f_size - bio->bio_offset);
379 dprintf(("ntfs_strategy: towrite: %d, fsize: %d\n",
380 towrite,(u_int32_t)fp->f_size));
382 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
383 fp->f_attrname, bio->bio_offset,towrite,
384 bp->b_data, &tmp, NULL);
387 kprintf("ntfs_strategy: ntfs_writeattr fail\n");
389 bp->b_flags |= B_ERROR;
394 panic("ntfs: bad b_cmd %d\n", bp->b_cmd);
401 * ntfs_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
402 * struct ucred *a_cred)
405 ntfs_write(struct vop_write_args *ap)
407 struct vnode *vp = ap->a_vp;
408 struct fnode *fp = VTOF(vp);
409 struct ntnode *ip = FTONT(fp);
410 struct uio *uio = ap->a_uio;
411 struct ntfsmount *ntmp = ip->i_mp;
416 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));
417 dprintf(("ntfs_write: filesize: %d",(u_int32_t)fp->f_size));
419 if (uio->uio_resid + uio->uio_offset > fp->f_size) {
420 kprintf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n");
424 towrite = min(uio->uio_resid, fp->f_size - uio->uio_offset);
426 dprintf((", towrite: %d\n",(u_int32_t)towrite));
428 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
429 fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio);
432 kprintf("ntfs_write: ntfs_writeattr failed: %d\n", error);
439 * ntfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
440 * struct thread *a_td)
443 ntfs_access(struct vop_access_args *ap)
445 struct vnode *vp = ap->a_vp;
446 struct ntnode *ip = VTONT(vp);
447 struct ucred *cred = ap->a_cred;
448 mode_t mask, mode = ap->a_mode;
455 dprintf(("ntfs_access: %d\n",ip->i_number));
458 * Disallow write attempts on read-only file systems;
459 * unless the file is a socket, fifo, or a block or
460 * character device resident on the file system.
463 switch ((int)vp->v_type) {
467 if (vp->v_mount->mnt_flag & MNT_RDONLY)
470 if (error = getinoquota(ip))
477 /* Otherwise, user id 0 always gets access. */
478 if (cred->cr_uid == 0)
483 /* Otherwise, check the owner. */
484 if (cred->cr_uid == ip->i_mp->ntm_uid) {
491 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES);
494 /* Otherwise, check the groups. */
495 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
496 if (ip->i_mp->ntm_gid == *gp) {
503 return ((ip->i_mp->ntm_mode&mask) == mask ? 0 : EACCES);
506 /* Otherwise, check everyone else. */
513 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES);
521 * ntfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
522 * struct thread *a_td)
526 ntfs_open(struct vop_open_args *ap)
528 return (vop_stdopen(ap));
534 * Update the times on the inode.
536 * ntfs_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred,
537 * struct thread *a_td)
541 ntfs_close(struct vop_close_args *ap)
544 struct vnode *vp = ap->a_vp;
545 struct ntnode *ip = VTONT(vp);
547 kprintf("ntfs_close: %d\n",ip->i_number);
550 return (vop_stdclose(ap));
554 * ntfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred,
555 * int *a_ncookies, u_int **cookies)
558 ntfs_readdir(struct vop_readdir_args *ap)
560 struct vnode *vp = ap->a_vp;
561 struct fnode *fp = VTOF(vp);
562 struct ntnode *ip = FTONT(fp);
563 struct uio *uio = ap->a_uio;
564 struct ntfsmount *ntmp = ip->i_mp;
566 u_int32_t faked = 0, num, off;
568 char convname[NTFS_MAXFILENAME + 1];
570 dprintf(("ntfs_readdir %d off: %d resid: %d\n",ip->i_number,(u_int32_t)uio->uio_offset,uio->uio_resid));
572 if (uio->uio_offset < 0 || uio->uio_offset > INT_MAX)
574 if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY)) != 0)
578 * uio->uio_offset carries the number of the entry
579 * where we should start returning dirents.
581 * We fake up "." if we're not reading the FS root
582 * and we always fake up "..".
584 * off contains the entry we are starting at,
585 * num increments while we are reading.
588 off = num = uio->uio_offset;
589 faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2;
591 /* Simulate . in every dir except ROOT */
592 if (ip->i_number != NTFS_ROOTINO && num == 0) {
593 if (vop_write_dirent(&error, uio, ip->i_number,
603 /* Simulate .. in every dir including ROOT */
604 if (num == faked - 1) {
605 /* XXX NTFS_ROOTINO seems to be wrong here */
606 if (vop_write_dirent(&error, uio, NTFS_ROOTINO,
617 struct attr_indexentry *iep;
620 * num is the number of the entry we will return,
621 * but ntfs_ntreaddir takes the entry number of the
622 * ntfs directory listing, so subtract the faked
625 error = ntfs_ntreaddir(ntmp, fp, num - faked, &iep);
633 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST);
634 iep = NTFS_NEXTREC(iep, struct attr_indexentry *))
636 if(!ntfs_isnamepermitted(ntmp,iep))
639 for (i=0; i < iep->ie_fnamelen; i++)
640 convname[i] = NTFS_U28(iep->ie_fname[i]);
643 if (vop_write_dirent(&error, uio, iep->ie_number,
644 (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG,
645 iep->ie_fnamelen, convname))
648 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, "
650 ncookies, convname, iep->ie_fnametype,
652 (iep->ie_fflag & NTFS_FFLAG_DIR) ?
664 uio->uio_offset = num;
666 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n",
667 ncookies,(u_int)(uio->uio_offset - off)));
668 dprintf(("ntfs_readdir: off: %d resid: %d\n",
669 (u_int32_t)uio->uio_offset,uio->uio_resid));
671 if (!error && ap->a_ncookies != NULL) {
672 #if defined(__DragonFly__)
675 #else /* defined(__NetBSD__) */
680 ddprintf(("ntfs_readdir: %d cookies\n",ncookies));
681 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
682 panic("ntfs_readdir: unexpected uio from NFS server");
683 #if defined(__DragonFly__)
684 MALLOC(cookies, u_long *, ncookies * sizeof(u_long),
686 #else /* defined(__NetBSD__) */
687 MALLOC(cookies, off_t *, ncookies * sizeof(off_t),
694 *ap->a_ncookies = ncookies;
695 *ap->a_cookies = cookies;
699 *ap->a_eofflag = VTONT(vp)->i_size <= uio->uio_offset;
707 * ntfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp,
708 * struct componentname *a_cnp)
711 ntfs_lookup(struct vop_old_lookup_args *ap)
713 struct vnode *dvp = ap->a_dvp;
714 struct ntnode *dip = VTONT(dvp);
715 struct ntfsmount *ntmp = dip->i_mp;
716 struct componentname *cnp = ap->a_cnp;
718 int lockparent = cnp->cn_flags & CNP_LOCKPARENT;
720 int wantparent = cnp->cn_flags & (CNP_LOCKPARENT | CNP_WANTPARENT);
722 dprintf(("ntfs_lookup: \"%.*s\" (%ld bytes) in %d, lp: %d, wp: %d \n",
723 (int)cnp->cn_namelen, cnp->cn_nameptr, cnp->cn_namelen,
724 dip->i_number, lockparent, wantparent));
728 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
729 dprintf(("ntfs_lookup: faking . directory in %d\n",
735 } else if (cnp->cn_flags & CNP_ISDOTDOT) {
738 dprintf(("ntfs_lookup: faking .. directory in %d\n",
741 error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap);
746 cnp->cn_flags |= CNP_PDIRUNLOCK;
748 dprintf(("ntfs_lookup: parentdir: %d\n",
749 vap->va_a_name->n_pnumber));
750 error = VFS_VGET(ntmp->ntm_mountp,
751 vap->va_a_name->n_pnumber,ap->a_vpp);
752 ntfs_ntvattrrele(vap);
754 if (VN_LOCK(dvp, LK_EXCLUSIVE | LK_RETRY) == 0)
755 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
760 error = VN_LOCK(dvp, LK_EXCLUSIVE);
766 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
769 error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp);
771 dprintf(("ntfs_ntlookupfile: returned %d\n", error));
775 dprintf(("ntfs_lookup: found ino: %d\n",
776 VTONT(*ap->a_vpp)->i_number));
784 #if defined(__DragonFly__)
786 * Flush the blocks of a file to disk.
788 * This function is worthless for vnodes that represent directories. Maybe we
789 * could just do a sync if they try an fsync on a directory file.
791 * ntfs_fsync(struct vnode *a_vp, struct ucred *a_cred, int a_waitfor,
792 * struct thread *a_td)
795 ntfs_fsync(struct vop_fsync_args *ap)
802 * Return POSIX pathconf information applicable to NTFS filesystem
805 ntfs_pathconf(struct vop_pathconf_args *ap)
807 switch (ap->a_name) {
812 *ap->a_retval = NTFS_MAXFILENAME;
815 *ap->a_retval = PATH_MAX;
817 case _PC_CHOWN_RESTRICTED:
823 #if defined(__NetBSD__)
827 case _PC_FILESIZEBITS:
838 * Global vfs data structures
840 struct vop_ops ntfs_vnode_vops = {
841 .vop_default = vop_defaultop,
842 .vop_getattr = ntfs_getattr,
843 .vop_inactive = ntfs_inactive,
844 .vop_reclaim = ntfs_reclaim,
845 .vop_print = ntfs_print,
846 .vop_pathconf = ntfs_pathconf,
847 .vop_old_lookup = ntfs_lookup,
848 .vop_access = ntfs_access,
849 .vop_close = ntfs_close,
850 .vop_open = ntfs_open,
851 .vop_readdir = ntfs_readdir,
852 .vop_fsync = ntfs_fsync,
853 .vop_bmap = ntfs_bmap,
854 .vop_getpages = ntfs_getpages,
855 .vop_putpages = ntfs_putpages,
856 .vop_strategy = ntfs_strategy,
857 .vop_read = ntfs_read,
858 .vop_write = ntfs_write