3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley
6 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
7 * Support code is derived from software contributed to Berkeley
8 * by Atsushi Murai (amurai@spec.co.jp).
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 * 4. 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 * @(#)cd9660_vnops.c 8.19 (Berkeley) 5/27/95
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/namei.h>
43 #include <sys/kernel.h>
48 #include <sys/mount.h>
49 #include <sys/vnode.h>
50 #include <fs/fifofs/fifo.h>
51 #include <sys/malloc.h>
52 #include <sys/dirent.h>
53 #include <sys/unistd.h>
54 #include <sys/filio.h>
57 #include <vm/vnode_pager.h>
60 #include <fs/cd9660/iso.h>
61 #include <fs/cd9660/cd9660_node.h>
62 #include <fs/cd9660/iso_rrip.h>
64 static vop_setattr_t cd9660_setattr;
65 static vop_open_t cd9660_open;
66 static vop_access_t cd9660_access;
67 static vop_getattr_t cd9660_getattr;
68 static vop_ioctl_t cd9660_ioctl;
69 static vop_pathconf_t cd9660_pathconf;
70 static vop_read_t cd9660_read;
72 static int iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off);
73 static int iso_shipdir(struct isoreaddir *idp);
74 static vop_readdir_t cd9660_readdir;
75 static vop_readlink_t cd9660_readlink;
76 static vop_strategy_t cd9660_strategy;
77 static vop_vptofh_t cd9660_vptofh;
80 * Setattr call. Only allowed for block and character special devices.
84 struct vop_setattr_args /* {
85 struct vnodeop_desc *a_desc;
91 struct vnode *vp = ap->a_vp;
92 struct vattr *vap = ap->a_vap;
94 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
95 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
96 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL)
98 if (vap->va_size != (u_quad_t)VNOVAL) {
119 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC.
120 * The mode is shifted to select the owner/group/other fields. The
121 * super user is granted all permissions.
126 struct vop_access_args /* {
129 struct ucred *a_cred;
133 struct vnode *vp = ap->a_vp;
134 struct iso_node *ip = VTOI(vp);
135 accmode_t accmode = ap->a_accmode;
137 if (vp->v_type == VCHR || vp->v_type == VBLK)
141 * Disallow write attempts unless the file is a socket,
142 * fifo, or a block or character device resident on the
145 if (accmode & VWRITE) {
146 switch (vp->v_type) {
157 return (vaccess(vp->v_type, ip->inode.iso_mode, ip->inode.iso_uid,
158 ip->inode.iso_gid, ap->a_accmode, ap->a_cred, NULL));
163 struct vop_open_args /* {
166 struct ucred *a_cred;
171 struct vnode *vp = ap->a_vp;
172 struct iso_node *ip = VTOI(vp);
174 if (vp->v_type == VCHR || vp->v_type == VBLK)
177 vnode_create_vobject(vp, ip->i_size, ap->a_td);
184 struct vop_getattr_args /* {
187 struct ucred *a_cred;
191 struct vnode *vp = ap->a_vp;
192 struct vattr *vap = ap->a_vap;
193 struct iso_node *ip = VTOI(vp);
195 vap->va_fsid = dev2udev(ip->i_mnt->im_dev);
196 vap->va_fileid = ip->i_number;
198 vap->va_mode = ip->inode.iso_mode;
199 vap->va_nlink = ip->inode.iso_links;
200 vap->va_uid = ip->inode.iso_uid;
201 vap->va_gid = ip->inode.iso_gid;
202 vap->va_atime = ip->inode.iso_atime;
203 vap->va_mtime = ip->inode.iso_mtime;
204 vap->va_ctime = ip->inode.iso_ctime;
205 vap->va_rdev = ip->inode.iso_rdev;
207 vap->va_size = (u_quad_t) ip->i_size;
208 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) {
209 struct vop_readlink_args rdlnk;
214 cp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
216 aiov.iov_len = MAXPATHLEN;
217 auio.uio_iov = &aiov;
220 auio.uio_rw = UIO_READ;
221 auio.uio_segflg = UIO_SYSSPACE;
222 auio.uio_td = curthread;
223 auio.uio_resid = MAXPATHLEN;
225 rdlnk.a_vp = ap->a_vp;
226 rdlnk.a_cred = ap->a_cred;
227 if (cd9660_readlink(&rdlnk) == 0)
228 vap->va_size = MAXPATHLEN - auio.uio_resid;
233 vap->va_blocksize = ip->i_mnt->logical_block_size;
234 vap->va_bytes = (u_quad_t) ip->i_size;
235 vap->va_type = vp->v_type;
241 * Vnode op for ioctl.
245 struct vop_ioctl_args /* {
250 struct ucred *a_cred;
259 vn_lock(vp, LK_SHARED | LK_RETRY);
260 if (vp->v_iflag & VI_DOOMED) {
264 if (vp->v_type == VCHR || vp->v_type == VBLK) {
272 switch (ap->a_command) {
274 *(int *)(ap->a_data) = ip->iso_start;
286 * Vnode op for reading.
290 struct vop_read_args /* {
294 struct ucred *a_cred;
297 struct vnode *vp = ap->a_vp;
298 struct uio *uio = ap->a_uio;
299 struct iso_node *ip = VTOI(vp);
302 daddr_t lbn, rablock;
304 int rasize, error = 0;
308 if (vp->v_type == VCHR || vp->v_type == VBLK)
311 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
313 if (uio->uio_resid == 0)
315 if (uio->uio_offset < 0)
319 lbn = lblkno(imp, uio->uio_offset);
320 on = blkoff(imp, uio->uio_offset);
321 n = min((u_int)(imp->logical_block_size - on),
323 diff = (off_t)ip->i_size - uio->uio_offset;
328 size = blksize(imp, ip, lbn);
330 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) {
331 if (lblktosize(imp, rablock) < ip->i_size)
332 error = cluster_read(vp, (off_t)ip->i_size,
333 lbn, size, NOCRED, uio->uio_resid,
334 (ap->a_ioflag >> 16), &bp);
336 error = bread(vp, lbn, size, NOCRED, &bp);
339 lblktosize(imp, rablock) < ip->i_size) {
340 rasize = blksize(imp, ip, rablock);
341 error = breadn(vp, lbn, size, &rablock,
342 &rasize, 1, NOCRED, &bp);
344 error = bread(vp, lbn, size, NOCRED, &bp);
346 n = min(n, size - bp->b_resid);
352 error = uiomove(bp->b_data + on, (int)n, uio);
354 } while (error == 0 && uio->uio_resid > 0 && n != 0);
359 * Structure for reading directories
362 struct dirent saveent;
363 struct dirent assocent;
364 struct dirent current;
376 iso_uiodir(idp,dp,off)
377 struct isoreaddir *idp;
383 dp->d_name[dp->d_namlen] = 0;
384 dp->d_reclen = GENERIC_DIRSIZ(dp);
386 if (idp->uio->uio_resid < dp->d_reclen) {
392 if (idp->ncookies <= 0) {
397 *idp->cookies++ = off;
401 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0)
409 struct isoreaddir *idp;
416 cl = idp->current.d_namlen;
417 cname = idp->current.d_name;
418 assoc = (cl > 1) && (*cname == ASSOCCHAR);
426 if (!(sl = dp->d_namlen)) {
428 sname = dp->d_name + 1;
429 sl = dp->d_namlen - 1;
433 || bcmp(sname,cname,sl)) {
434 if (idp->assocent.d_namlen) {
435 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0)
437 idp->assocent.d_namlen = 0;
439 if (idp->saveent.d_namlen) {
440 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0)
442 idp->saveent.d_namlen = 0;
446 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current);
448 idp->assocoff = idp->curroff;
449 bcopy(&idp->current,&idp->assocent,idp->current.d_reclen);
451 idp->saveoff = idp->curroff;
452 bcopy(&idp->current,&idp->saveent,idp->current.d_reclen);
458 * Vnode op for readdir
462 struct vop_readdir_args /* {
465 struct ucred *a_cred;
471 struct uio *uio = ap->a_uio;
472 struct isoreaddir *idp;
473 struct vnode *vdp = ap->a_vp;
476 struct buf *bp = NULL;
477 struct iso_directory_record *ep;
478 int entryoffsetinblock;
485 u_long *cookies = NULL;
489 bmask = imp->im_bmask;
491 idp = malloc(sizeof(*idp), M_TEMP, M_WAITOK);
492 idp->saveent.d_namlen = idp->assocent.d_namlen = 0;
495 * Is it worth trying to figure out the type?
497 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type =
500 if (ap->a_ncookies == NULL) {
504 * Guess the number of cookies needed.
506 ncookies = uio->uio_resid / 16;
507 cookies = malloc(ncookies * sizeof(u_long),
509 idp->cookies = cookies;
510 idp->ncookies = ncookies;
513 idp->curroff = uio->uio_offset;
514 idp->uio_off = uio->uio_offset;
516 if ((entryoffsetinblock = idp->curroff & bmask) &&
517 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) {
521 endsearch = dp->i_size;
523 while (idp->curroff < endsearch) {
525 * If offset is on a block boundary,
526 * read the next directory block.
527 * Release previous if it exists.
529 if ((idp->curroff & bmask) == 0) {
533 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0)
535 entryoffsetinblock = 0;
538 * Get pointer to next entry.
540 ep = (struct iso_directory_record *)
541 ((char *)bp->b_data + entryoffsetinblock);
543 reclen = isonum_711(ep->length);
545 /* skip to next block, if any */
547 (idp->curroff & ~bmask) + imp->logical_block_size;
551 if (reclen < ISO_DIRECTORY_RECORD_SIZE) {
553 /* illegal entry, stop */
557 if (entryoffsetinblock + reclen > imp->logical_block_size) {
559 /* illegal directory, so stop looking */
563 idp->current.d_namlen = isonum_711(ep->name_len);
565 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) {
567 /* illegal entry, stop */
571 if (isonum_711(ep->flags)&2)
572 idp->current.d_fileno = isodirino(ep, imp);
574 idp->current.d_fileno = dbtob(bp->b_blkno) +
577 idp->curroff += reclen;
579 switch (imp->iso_ftype) {
581 cd9660_rrip_getname(ep,idp->current.d_name, &namelen,
582 &idp->current.d_fileno,imp);
583 idp->current.d_namlen = (u_char)namelen;
584 if (idp->current.d_namlen)
585 error = iso_uiodir(idp,&idp->current,idp->curroff);
587 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/
588 strcpy(idp->current.d_name,"..");
589 if (idp->current.d_namlen == 1 && ep->name[0] == 0) {
590 idp->current.d_namlen = 1;
591 error = iso_uiodir(idp,&idp->current,idp->curroff);
592 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) {
593 idp->current.d_namlen = 2;
594 error = iso_uiodir(idp,&idp->current,idp->curroff);
596 isofntrans(ep->name,idp->current.d_namlen,
597 idp->current.d_name, &namelen,
598 imp->iso_ftype == ISO_FTYPE_9660,
599 isonum_711(ep->flags)&4,
603 idp->current.d_namlen = (u_char)namelen;
604 if (imp->iso_ftype == ISO_FTYPE_DEFAULT)
605 error = iso_shipdir(idp);
607 error = iso_uiodir(idp,&idp->current,idp->curroff);
613 entryoffsetinblock += reclen;
616 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) {
617 idp->current.d_namlen = 0;
618 error = iso_shipdir(idp);
623 if (ap->a_ncookies != NULL) {
625 free(cookies, M_TEMP);
628 * Work out the number of cookies actually used.
630 *ap->a_ncookies = ncookies - idp->ncookies;
631 *ap->a_cookies = cookies;
638 uio->uio_offset = idp->uio_off;
639 *ap->a_eofflag = idp->eofflag;
647 * Return target name of a symbolic link
648 * Shouldn't we get the parent vnode and read the data from there?
649 * This could eventually result in deadlocks in cd9660_lookup.
650 * But otherwise the block read here is in the block buffer two times.
652 typedef struct iso_directory_record ISODIR;
653 typedef struct iso_node ISONODE;
654 typedef struct iso_mnt ISOMNT;
657 struct vop_readlink_args /* {
660 struct ucred *a_cred;
676 if (imp->iso_ftype != ISO_FTYPE_RRIP)
680 * Get parents directory record block that this inode included.
682 error = bread(imp->im_devvp,
683 (ip->i_number >> imp->im_bshift) <<
684 (imp->im_bshift - DEV_BSHIFT),
685 imp->logical_block_size, NOCRED, &bp);
692 * Setup the directory pointer for this inode
694 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask));
697 * Just make sure, we have a right one....
698 * 1: Check not cross boundary on block
700 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length)
701 > (unsigned)imp->logical_block_size) {
708 * Abuse a namei buffer for now.
710 if (uio->uio_segflg == UIO_SYSSPACE)
711 symname = uio->uio_iov->iov_base;
713 symname = uma_zalloc(namei_zone, M_WAITOK);
716 * Ok, we just gathering a symbolic name in SL record.
718 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) {
719 if (uio->uio_segflg != UIO_SYSSPACE)
720 uma_zfree(namei_zone, symname);
725 * Don't forget before you leave from home ;-)
730 * return with the symbolic name to caller's.
732 if (uio->uio_segflg != UIO_SYSSPACE) {
733 error = uiomove(symname, symlen, uio);
734 uma_zfree(namei_zone, symname);
737 uio->uio_resid -= symlen;
738 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen;
739 uio->uio_iov->iov_len -= symlen;
744 * Calculate the logical to physical mapping if not done already,
745 * then call the device strategy routine.
749 struct vop_strategy_args /* {
754 struct buf *bp = ap->a_bp;
755 struct vnode *vp = ap->a_vp;
760 if (vp->v_type == VBLK || vp->v_type == VCHR)
761 panic("cd9660_strategy: spec");
762 if (bp->b_blkno == bp->b_lblkno) {
763 bp->b_blkno = (ip->iso_start + bp->b_lblkno) <<
764 (ip->i_mnt->im_bshift - DEV_BSHIFT);
766 bp->b_iooffset = dbtob(bp->b_blkno);
767 bo = ip->i_mnt->im_bo;
773 * Return POSIX pathconf information applicable to cd9660 filesystems.
777 struct vop_pathconf_args /* {
780 register_t *a_retval;
784 switch (ap->a_name) {
789 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP)
790 *ap->a_retval = NAME_MAX;
795 *ap->a_retval = PATH_MAX;
798 *ap->a_retval = PIPE_BUF;
800 case _PC_CHOWN_RESTRICTED:
813 * Vnode pointer to File handle
817 struct vop_vptofh_args /* {
822 struct iso_node *ip = VTOI(ap->a_vp);
825 ifhp = (struct ifid *)ap->a_fhp;
826 ifhp->ifid_len = sizeof(struct ifid);
828 ifhp->ifid_ino = ip->i_number;
829 ifhp->ifid_start = ip->iso_start;
832 printf("vptofh: ino %d, start %ld\n",
833 ifhp->ifid_ino,ifhp->ifid_start);
839 * Global vfs data structures for cd9660
841 struct vop_vector cd9660_vnodeops = {
842 .vop_default = &default_vnodeops,
843 .vop_open = cd9660_open,
844 .vop_access = cd9660_access,
845 .vop_bmap = cd9660_bmap,
846 .vop_cachedlookup = cd9660_lookup,
847 .vop_getattr = cd9660_getattr,
848 .vop_inactive = cd9660_inactive,
849 .vop_ioctl = cd9660_ioctl,
850 .vop_lookup = vfs_cache_lookup,
851 .vop_pathconf = cd9660_pathconf,
852 .vop_read = cd9660_read,
853 .vop_readdir = cd9660_readdir,
854 .vop_readlink = cd9660_readlink,
855 .vop_reclaim = cd9660_reclaim,
856 .vop_setattr = cd9660_setattr,
857 .vop_strategy = cd9660_strategy,
858 .vop_vptofh = cd9660_vptofh,
862 * Special device vnode ops
865 struct vop_vector cd9660_fifoops = {
866 .vop_default = &fifo_specops,
867 .vop_access = cd9660_access,
868 .vop_getattr = cd9660_getattr,
869 .vop_inactive = cd9660_inactive,
870 .vop_reclaim = cd9660_reclaim,
871 .vop_setattr = cd9660_setattr,
872 .vop_vptofh = cd9660_vptofh,