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 #include <vm/vm_page.h>
56 #include <vm/vm_object.h>
57 #include <vm/vm_pager.h>
58 #include <vm/vnode_pager.h>
59 #include <vm/vm_extern.h>
61 #include <sys/sysctl.h>
66 #include "ntfs_inode.h"
67 #include "ntfs_subr.h"
69 #include <sys/unistd.h> /* for pathconf(2) constants */
71 static int ntfs_read (struct vop_read_args
*);
72 static int ntfs_write (struct vop_write_args
*ap
);
73 static int ntfs_getattr (struct vop_getattr_args
*ap
);
74 static int ntfs_inactive (struct vop_inactive_args
*ap
);
75 static int ntfs_print (struct vop_print_args
*ap
);
76 static int ntfs_reclaim (struct vop_reclaim_args
*ap
);
77 static int ntfs_strategy (struct vop_strategy_args
*ap
);
78 static int ntfs_access (struct vop_access_args
*ap
);
79 static int ntfs_open (struct vop_open_args
*ap
);
80 static int ntfs_close (struct vop_close_args
*ap
);
81 static int ntfs_readdir (struct vop_readdir_args
*ap
);
82 static int ntfs_lookup (struct vop_old_lookup_args
*ap
);
83 static int ntfs_bmap (struct vop_bmap_args
*ap
);
84 static int ntfs_fsync (struct vop_fsync_args
*ap
);
85 static int ntfs_pathconf (struct vop_pathconf_args
*);
87 int ntfs_prtactive
= 1; /* 1 => print out reclaim of active vnodes */
90 * This is a noop, simply returning what one has been given.
92 * ntfs_bmap(struct vnode *a_vp, off_t a_loffset,
93 * daddr_t *a_doffsetp, int *a_runp, int *a_runb)
96 ntfs_bmap(struct vop_bmap_args
*ap
)
98 dprintf(("ntfs_bmap: vn: %p, blk: %u\n", ap
->a_vp
,
99 (u_int32_t
)ap
->a_loffset
));
100 if (ap
->a_doffsetp
!= NULL
)
101 *ap
->a_doffsetp
= ap
->a_loffset
;
102 if (ap
->a_runp
!= NULL
)
104 if (ap
->a_runb
!= NULL
)
110 * ntfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
111 * struct ucred *a_cred)
114 ntfs_read(struct vop_read_args
*ap
)
116 struct vnode
*vp
= ap
->a_vp
;
117 struct fnode
*fp
= VTOF(vp
);
118 struct ntnode
*ip
= FTONT(fp
);
119 struct uio
*uio
= ap
->a_uio
;
120 struct ntfsmount
*ntmp
= ip
->i_mp
;
123 int resid
, off
, toread
;
126 dprintf(("ntfs_read: ino: %ju, off: %u resid: %zd, segflg: %d\n",
127 (uintmax_t)ip
->i_number
, (uint32_t)uio
->uio_offset
,
128 uio
->uio_resid
, uio
->uio_segflg
));
130 dprintf(("ntfs_read: filesize: %ju", (uintmax_t)fp
->f_size
));
132 /* don't allow reading after end of file */
133 if (uio
->uio_offset
> fp
->f_size
)
136 resid
= (int)szmin(uio
->uio_resid
, fp
->f_size
- uio
->uio_offset
);
138 dprintf((", resid: %d\n", resid
));
142 cn
= ntfs_btocn(uio
->uio_offset
);
143 off
= ntfs_btocnoff(uio
->uio_offset
);
145 toread
= min(off
+ resid
, ntfs_cntob(1));
147 error
= bread(vp
, ntfs_cntodoff(cn
), ntfs_cntob(1), &bp
);
153 error
= uiomovebp(bp
, bp
->b_data
+ off
, toread
- off
, uio
);
160 resid
-= toread
- off
;
167 * ntfs_getattr(struct vnode *a_vp, struct vattr *a_vap)
170 ntfs_getattr(struct vop_getattr_args
*ap
)
172 struct vnode
*vp
= ap
->a_vp
;
173 struct fnode
*fp
= VTOF(vp
);
174 struct ntnode
*ip
= FTONT(fp
);
175 struct vattr
*vap
= ap
->a_vap
;
177 dprintf(("ntfs_getattr: %ju, flags: %d\n", (uintmax_t)ip
->i_number
,
180 vap
->va_fsid
= dev2udev(ip
->i_dev
);
181 vap
->va_fileid
= ip
->i_number
;
182 vap
->va_mode
= ip
->i_mp
->ntm_mode
;
183 vap
->va_nlink
= ip
->i_nlink
;
184 vap
->va_uid
= ip
->i_mp
->ntm_uid
;
185 vap
->va_gid
= ip
->i_mp
->ntm_gid
;
186 vap
->va_rmajor
= VNOVAL
;
187 vap
->va_rminor
= VNOVAL
;
188 vap
->va_size
= fp
->f_size
;
189 vap
->va_bytes
= fp
->f_allocated
;
190 vap
->va_atime
= ntfs_nttimetounix(fp
->f_times
.t_access
);
191 vap
->va_mtime
= ntfs_nttimetounix(fp
->f_times
.t_write
);
192 vap
->va_ctime
= ntfs_nttimetounix(fp
->f_times
.t_create
);
193 vap
->va_flags
= ip
->i_flag
;
195 vap
->va_blocksize
= ip
->i_mp
->ntm_spc
* ip
->i_mp
->ntm_bps
;
196 vap
->va_type
= vp
->v_type
;
203 * Last reference to an ntnode. If necessary, write or delete it.
205 * ntfs_inactive(struct vnode *a_vp)
208 ntfs_inactive(struct vop_inactive_args
*ap
)
210 struct vnode
*vp
= ap
->a_vp
;
212 struct ntnode
*ip
= VTONT(vp
);
215 dprintf(("ntfs_inactive: vnode: %p, ntnode: %ju\n", vp
, (uintmax_t)ip
->i_number
));
217 if (ntfs_prtactive
&& VREFCNT(vp
) > 1)
218 vprint("ntfs_inactive: pushing active", vp
);
221 * XXX since we don't support any filesystem changes
222 * right now, nothing more needs to be done
228 * Reclaim an fnode/ntnode so that it can be used for other purposes.
230 * ntfs_reclaim(struct vnode *a_vp)
233 ntfs_reclaim(struct vop_reclaim_args
*ap
)
235 struct vnode
*vp
= ap
->a_vp
;
236 struct fnode
*fp
= VTOF(vp
);
237 struct ntnode
*ip
= FTONT(fp
);
240 dprintf(("ntfs_reclaim: vnode: %p, ntnode: %ju\n", vp
, (uintmax_t)ip
->i_number
));
242 if (ntfs_prtactive
&& VREFCNT(vp
) > 1)
243 vprint("ntfs_reclaim: pushing active", vp
);
245 if ((error
= ntfs_ntget(ip
)) != 0)
256 * ntfs_print(struct vnode *a_vp)
259 ntfs_print(struct vop_print_args
*ap
)
265 * Calculate the logical to physical mapping if not done already,
266 * then call the device strategy routine.
268 * ntfs_strategy(struct vnode *a_vp, struct bio *a_bio)
271 ntfs_strategy(struct vop_strategy_args
*ap
)
273 struct bio
*bio
= ap
->a_bio
;
274 struct buf
*bp
= bio
->bio_buf
;
275 struct vnode
*vp
= ap
->a_vp
;
276 struct fnode
*fp
= VTOF(vp
);
277 struct ntnode
*ip
= FTONT(fp
);
278 struct ntfsmount
*ntmp
= ip
->i_mp
;
284 dprintf(("ntfs_strategy: loffset: %u, doffset: %u\n",
285 (uint32_t)bp
->b_loffset
, (uint32_t)bio
->bio_offset
));
287 dprintf(("strategy: bcount: %u flags: 0x%x\n",
288 bp
->b_bcount
, bp
->b_flags
));
294 if (bio
->bio_offset
>= fp
->f_size
) {
298 toread
= min(bp
->b_bcount
,
299 fp
->f_size
- bio
->bio_offset
);
300 dprintf(("ntfs_strategy: toread: %u, fsize: %ju\n",
301 toread
, (uintmax_t)fp
->f_size
));
303 error
= ntfs_readattr(ntmp
, ip
, fp
->f_attrtype
,
304 fp
->f_attrname
, bio
->bio_offset
,
305 toread
, bp
->b_data
, NULL
);
308 kprintf("ntfs_strategy: ntfs_readattr failed\n");
310 bp
->b_flags
|= B_ERROR
;
313 bzero(bp
->b_data
+ toread
, bp
->b_bcount
- toread
);
317 if (bio
->bio_offset
+ bp
->b_bcount
>= fp
->f_size
) {
318 kprintf("ntfs_strategy: CAN'T EXTEND FILE\n");
319 bp
->b_error
= error
= EFBIG
;
320 bp
->b_flags
|= B_ERROR
;
322 towrite
= min(bp
->b_bcount
,
323 fp
->f_size
- bio
->bio_offset
);
324 dprintf(("ntfs_strategy: towrite: %d, fsize: %ju\n",
325 towrite
, (uintmax_t)fp
->f_size
));
327 error
= ntfs_writeattr_plain(ntmp
, ip
, fp
->f_attrtype
,
328 fp
->f_attrname
, bio
->bio_offset
,towrite
,
329 bp
->b_data
, &tmp
, NULL
);
332 kprintf("ntfs_strategy: ntfs_writeattr fail\n");
334 bp
->b_flags
|= B_ERROR
;
339 panic("ntfs: bad b_cmd %d", bp
->b_cmd
);
346 * ntfs_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
347 * struct ucred *a_cred)
350 ntfs_write(struct vop_write_args
*ap
)
352 struct vnode
*vp
= ap
->a_vp
;
353 struct fnode
*fp
= VTOF(vp
);
354 struct ntnode
*ip
= FTONT(fp
);
355 struct uio
*uio
= ap
->a_uio
;
356 struct ntfsmount
*ntmp
= ip
->i_mp
;
361 dprintf(("ntfs_write: ino: %ju, off: %u resid: %zd, segflg: %d\n",
362 (uintmax_t)ip
->i_number
, (uint32_t)uio
->uio_offset
,
363 uio
->uio_resid
, uio
->uio_segflg
));
364 dprintf(("ntfs_write: filesize: %ju ", (uintmax_t)fp
->f_size
));
366 if (uio
->uio_resid
+ uio
->uio_offset
> fp
->f_size
) {
367 kprintf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n");
370 if (uio
->uio_offset
> fp
->f_size
)
373 towrite
= szmin(uio
->uio_resid
, fp
->f_size
- uio
->uio_offset
);
375 dprintf((", towrite: %zd\n", towrite
));
377 error
= ntfs_writeattr_plain(ntmp
, ip
, fp
->f_attrtype
,
378 fp
->f_attrname
, uio
->uio_offset
, towrite
, NULL
, &written
, uio
);
381 kprintf("ntfs_write: ntfs_writeattr failed: %d\n", error
);
388 * ntfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred)
391 ntfs_access(struct vop_access_args
*ap
)
393 struct vnode
*vp
= ap
->a_vp
;
394 struct ntnode
*ip
= VTONT(vp
);
395 struct ucred
*cred
= ap
->a_cred
;
396 mode_t mask
, mode
= ap
->a_mode
;
403 dprintf(("ntfs_access: %ju\n", (uintmax_t)ip
->i_number
));
406 * Disallow write attempts on read-only file systems;
407 * unless the file is a socket, fifo, or a block or
408 * character device resident on the file system.
411 switch ((int)vp
->v_type
) {
415 if (vp
->v_mount
->mnt_flag
& MNT_RDONLY
)
418 if (error
= getinoquota(ip
))
425 /* Otherwise, user id 0 always gets access. */
426 if (cred
->cr_uid
== 0)
431 /* Otherwise, check the owner. */
432 if (cred
->cr_uid
== ip
->i_mp
->ntm_uid
) {
439 return ((ip
->i_mp
->ntm_mode
& mask
) == mask
? 0 : EACCES
);
442 /* Otherwise, check the groups. */
443 for (i
= 0, gp
= cred
->cr_groups
; i
< cred
->cr_ngroups
; i
++, gp
++)
444 if (ip
->i_mp
->ntm_gid
== *gp
) {
451 return ((ip
->i_mp
->ntm_mode
&mask
) == mask
? 0 : EACCES
);
454 /* Otherwise, check everyone else. */
461 return ((ip
->i_mp
->ntm_mode
& mask
) == mask
? 0 : EACCES
);
469 * ntfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
474 ntfs_open(struct vop_open_args
*ap
)
476 return (vop_stdopen(ap
));
482 * Update the times on the inode.
484 * ntfs_close(struct vnode *a_vp, int a_fflag)
488 ntfs_close(struct vop_close_args
*ap
)
491 struct vnode
*vp
= ap
->a_vp
;
492 struct ntnode
*ip
= VTONT(vp
);
494 kprintf("ntfs_close: %ju\n", (uintmax_t)ip
->i_number
);
497 return (vop_stdclose(ap
));
501 * ntfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred,
502 * int *a_ncookies, off_t **cookies)
505 ntfs_readdir(struct vop_readdir_args
*ap
)
507 struct vnode
*vp
= ap
->a_vp
;
508 struct fnode
*fp
= VTOF(vp
);
509 struct ntnode
*ip
= FTONT(fp
);
510 struct uio
*uio
= ap
->a_uio
;
511 struct ntfsmount
*ntmp
= ip
->i_mp
;
514 u_int32_t faked
= 0, num
, off
;
516 char convname
[NTFS_MAXFILENAME
+ 1];
518 dprintf(("ntfs_readdir %ju off: %u resid: %zd\n",
519 (uintmax_t)ip
->i_number
, (uint32_t)uio
->uio_offset
,
522 if (uio
->uio_offset
< 0 || uio
->uio_offset
> INT_MAX
)
524 error
= vn_lock(vp
, LK_EXCLUSIVE
| LK_RETRY
| LK_FAILRECLAIM
);
529 * uio->uio_offset carries the number of the entry
530 * where we should start returning dirents.
532 * We fake up "." if we're not reading the FS root
533 * and we always fake up "..".
535 * off contains the entry we are starting at,
536 * num increments while we are reading.
539 off
= num
= uio
->uio_offset
;
540 faked
= (ip
->i_number
== NTFS_ROOTINO
) ? 1 : 2;
542 /* Simulate . in every dir except ROOT */
543 if (ip
->i_number
!= NTFS_ROOTINO
&& num
== 0) {
544 if (vop_write_dirent(&error
, uio
, ip
->i_number
,
554 /* Simulate .. in every dir including ROOT */
555 if (num
== faked
- 1) {
556 /* XXX NTFS_ROOTINO seems to be wrong here */
557 if (vop_write_dirent(&error
, uio
, NTFS_ROOTINO
,
568 struct attr_indexentry
*iep
;
571 * num is the number of the entry we will return,
572 * but ntfs_ntreaddir takes the entry number of the
573 * ntfs directory listing, so subtract the faked
576 error
= ntfs_ntreaddir(ntmp
, fp
, num
- faked
, &iep
);
584 for (; !(iep
->ie_flag
& NTFS_IEFLAG_LAST
);
585 iep
= NTFS_NEXTREC(iep
, struct attr_indexentry
*))
587 if(!ntfs_isnamepermitted(ntmp
,iep
))
589 for(i
=0, j
=0; i
< iep
->ie_fnamelen
; i
++, j
++) {
590 c
= NTFS_U28(iep
->ie_fname
[i
]);
592 convname
[j
++] = (char)(c
>>8);
593 convname
[j
] = (char)c
&0xFF;
596 if (vop_write_dirent(&error
, uio
, iep
->ie_number
,
597 (iep
->ie_fflag
& NTFS_FFLAG_DIR
) ? DT_DIR
: DT_REG
,
601 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, "
603 ncookies
, convname
, iep
->ie_fnametype
,
605 (iep
->ie_fflag
& NTFS_FFLAG_DIR
) ?
617 uio
->uio_offset
= num
;
619 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n",
620 ncookies
,(u_int
)(uio
->uio_offset
- off
)));
621 dprintf(("ntfs_readdir: off: %u resid: %zd\n",
622 (uint32_t)uio
->uio_offset
, uio
->uio_resid
));
624 if (!error
&& ap
->a_ncookies
!= NULL
) {
628 ddprintf(("ntfs_readdir: %d cookies\n",ncookies
));
629 if (uio
->uio_segflg
!= UIO_SYSSPACE
|| uio
->uio_iovcnt
!= 1)
630 panic("ntfs_readdir: unexpected uio from NFS server");
631 cookies
= kmalloc(ncookies
* sizeof(off_t
), M_TEMP
, M_WAITOK
);
636 *ap
->a_ncookies
= ncookies
;
637 *ap
->a_cookies
= cookies
;
641 *ap->a_eofflag = VTONT(vp)->i_size <= uio->uio_offset;
649 * ntfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp,
650 * struct componentname *a_cnp)
653 ntfs_lookup(struct vop_old_lookup_args
*ap
)
655 struct vnode
*dvp
= ap
->a_dvp
;
656 struct ntnode
*dip
= VTONT(dvp
);
657 struct ntfsmount
*ntmp
= dip
->i_mp
;
658 struct componentname
*cnp
= ap
->a_cnp
;
660 int lockparent
= cnp
->cn_flags
& CNP_LOCKPARENT
;
662 int wantparent
= cnp
->cn_flags
& (CNP_LOCKPARENT
| CNP_WANTPARENT
);
664 dprintf(("ntfs_lookup: \"%.*s\" (%ld bytes) in %ju, lp: %d, wp: %d \n",
665 (int)cnp
->cn_namelen
, cnp
->cn_nameptr
, cnp
->cn_namelen
,
666 (uintmax_t)dip
->i_number
, lockparent
, wantparent
));
670 if (cnp
->cn_namelen
== 1 && cnp
->cn_nameptr
[0] == '.') {
671 dprintf(("ntfs_lookup: faking . directory in %u\n",
672 (uint32_t)dip
->i_number
));
677 } else if (cnp
->cn_flags
& CNP_ISDOTDOT
) {
680 dprintf(("ntfs_lookup: faking .. directory in %d\n",
681 (uint32_t)dip
->i_number
));
683 error
= ntfs_ntvattrget(ntmp
, dip
, NTFS_A_NAME
, NULL
, 0, &vap
);
688 cnp
->cn_flags
|= CNP_PDIRUNLOCK
;
690 dprintf(("ntfs_lookup: parentdir: %d\n",
691 vap
->va_a_name
->n_pnumber
));
692 error
= VFS_VGET(ntmp
->ntm_mountp
, NULL
,
693 vap
->va_a_name
->n_pnumber
,ap
->a_vpp
);
694 ntfs_ntvattrrele(vap
);
696 if (VOP_LOCK(dvp
, LK_EXCLUSIVE
| LK_RETRY
) == 0)
697 cnp
->cn_flags
&= ~CNP_PDIRUNLOCK
;
702 error
= VOP_LOCK(dvp
, LK_EXCLUSIVE
);
708 cnp
->cn_flags
&= ~CNP_PDIRUNLOCK
;
711 error
= ntfs_ntlookupfile(ntmp
, dvp
, cnp
, ap
->a_vpp
);
713 dprintf(("ntfs_ntlookupfile: returned %d\n", error
));
717 dprintf(("ntfs_lookup: found ino: %u\n",
718 (uint32_t)VTONT(*ap
->a_vpp
)->i_number
));
722 cnp
->cn_flags
|= CNP_PDIRUNLOCK
;
729 * Flush the blocks of a file to disk.
731 * This function is worthless for vnodes that represent directories. Maybe we
732 * could just do a sync if they try an fsync on a directory file.
734 * ntfs_fsync(struct vnode *a_vp, int a_waitfor)
737 ntfs_fsync(struct vop_fsync_args
*ap
)
743 * Return POSIX pathconf information applicable to NTFS filesystem
746 ntfs_pathconf(struct vop_pathconf_args
*ap
)
748 switch (ap
->a_name
) {
753 *ap
->a_retval
= NTFS_MAXFILENAME
;
756 *ap
->a_retval
= PATH_MAX
;
758 case _PC_CHOWN_RESTRICTED
:
771 * Global vfs data structures
773 struct vop_ops ntfs_vnode_vops
= {
774 .vop_default
= vop_defaultop
,
775 .vop_getattr
= ntfs_getattr
,
776 .vop_inactive
= ntfs_inactive
,
777 .vop_reclaim
= ntfs_reclaim
,
778 .vop_print
= ntfs_print
,
779 .vop_pathconf
= ntfs_pathconf
,
780 .vop_old_lookup
= ntfs_lookup
,
781 .vop_access
= ntfs_access
,
782 .vop_close
= ntfs_close
,
783 .vop_open
= ntfs_open
,
784 .vop_readdir
= ntfs_readdir
,
785 .vop_fsync
= ntfs_fsync
,
786 .vop_bmap
= ntfs_bmap
,
787 .vop_getpages
= vop_stdgetpages
,
788 .vop_putpages
= vop_stdputpages
,
789 .vop_strategy
= ntfs_strategy
,
790 .vop_read
= ntfs_read
,
791 .vop_write
= ntfs_write