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).
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11 * modification, are permitted provided that the following conditions
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14 * notice, this list of conditions and the following disclaimer.
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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.
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38 * @(#)cd9660_vnops.c 8.19 (Berkeley) 5/27/95
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/namei.h>
45 #include <sys/kernel.h>
49 #include <sys/mount.h>
50 #include <sys/vnode.h>
51 #include <fs/fifofs/fifo.h>
52 #include <sys/malloc.h>
53 #include <sys/dirent.h>
54 #include <sys/unistd.h>
55 #include <sys/filio.h>
58 #include <vm/vnode_pager.h>
61 #include <isofs/cd9660/iso.h>
62 #include <isofs/cd9660/cd9660_node.h>
63 #include <isofs/cd9660/iso_rrip.h>
65 static int cd9660_setattr(struct vop_setattr_args *);
66 static int cd9660_access(struct vop_access_args *);
67 static int cd9660_getattr(struct vop_getattr_args *);
68 static int cd9660_ioctl(struct vop_ioctl_args *);
69 static int cd9660_pathconf(struct vop_pathconf_args *);
70 static int cd9660_read(struct vop_read_args *);
72 static int iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off);
73 static int iso_shipdir(struct isoreaddir *idp);
74 static int cd9660_readdir(struct vop_readdir_args *);
75 static int cd9660_readlink(struct vop_readlink_args *ap);
76 static int cd9660_strategy(struct vop_strategy_args *);
79 * Setattr call. Only allowed for block and character special devices.
83 struct vop_setattr_args /* {
84 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) {
118 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC.
119 * The mode is shifted to select the owner/group/other fields. The
120 * super user is granted all permissions.
125 struct vop_access_args /* {
128 struct ucred *a_cred;
132 struct vnode *vp = ap->a_vp;
133 struct iso_node *ip = VTOI(vp);
134 mode_t mode = ap->a_mode;
137 * Disallow write attempts unless the file is a socket,
138 * fifo, or a block or character device resident on the
142 switch (vp->v_type) {
153 return (vaccess(vp->v_type, ip->inode.iso_mode, ip->inode.iso_uid,
154 ip->inode.iso_gid, ap->a_mode, ap->a_cred, NULL));
159 struct vop_getattr_args /* {
162 struct ucred *a_cred;
167 struct vnode *vp = ap->a_vp;
168 register struct vattr *vap = ap->a_vap;
169 register struct iso_node *ip = VTOI(vp);
171 vap->va_fsid = dev2udev(ip->i_dev);
174 * Don't use ip->i_ino for this since it is wrong for hard links.
175 * ip->i_ino should be the same as ip->iso_start (or not exist),
176 * but this currently doesn't work since we abuse it to look up
177 * parent directories from inodes.
179 vap->va_fileid = ip->iso_start;
181 vap->va_mode = ip->inode.iso_mode;
182 vap->va_nlink = ip->inode.iso_links;
183 vap->va_uid = ip->inode.iso_uid;
184 vap->va_gid = ip->inode.iso_gid;
185 vap->va_atime = ip->inode.iso_atime;
186 vap->va_mtime = ip->inode.iso_mtime;
187 vap->va_ctime = ip->inode.iso_ctime;
188 vap->va_rdev = ip->inode.iso_rdev;
190 vap->va_size = (u_quad_t) ip->i_size;
191 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) {
192 struct vop_readlink_args rdlnk;
197 MALLOC(cp, char *, MAXPATHLEN, M_TEMP, M_WAITOK);
199 aiov.iov_len = MAXPATHLEN;
200 auio.uio_iov = &aiov;
203 auio.uio_rw = UIO_READ;
204 auio.uio_segflg = UIO_SYSSPACE;
205 auio.uio_td = ap->a_td;
206 auio.uio_resid = MAXPATHLEN;
208 rdlnk.a_vp = ap->a_vp;
209 rdlnk.a_cred = ap->a_cred;
210 if (cd9660_readlink(&rdlnk) == 0)
211 vap->va_size = MAXPATHLEN - auio.uio_resid;
216 vap->va_blocksize = ip->i_mnt->logical_block_size;
217 vap->va_bytes = (u_quad_t) ip->i_size;
218 vap->va_type = vp->v_type;
224 * Vnode op for ioctl.
228 struct vop_ioctl_args /* {
233 struct ucred *a_cred;
237 struct vnode *vp = ap->a_vp;
238 struct iso_node *ip = VTOI(vp);
240 switch (ap->a_command) {
243 *(int *)(ap->a_data) = ip->iso_start;
251 * Vnode op for reading.
255 struct vop_read_args /* {
259 struct ucred *a_cred;
262 struct vnode *vp = ap->a_vp;
263 register struct uio *uio = ap->a_uio;
264 register struct iso_node *ip = VTOI(vp);
265 register struct iso_mnt *imp;
267 daddr_t lbn, rablock;
269 int rasize, error = 0;
273 seqcount = ap->a_ioflag >> 16;
275 if (uio->uio_resid == 0)
277 if (uio->uio_offset < 0)
279 ip->i_flag |= IN_ACCESS;
282 lbn = lblkno(imp, uio->uio_offset);
283 on = blkoff(imp, uio->uio_offset);
284 n = min((u_int)(imp->logical_block_size - on),
286 diff = (off_t)ip->i_size - uio->uio_offset;
291 size = blksize(imp, ip, lbn);
293 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) {
294 if (lblktosize(imp, rablock) < ip->i_size)
295 error = cluster_read(vp, (off_t)ip->i_size,
296 lbn, size, NOCRED, uio->uio_resid,
297 (ap->a_ioflag >> 16), &bp);
299 error = bread(vp, lbn, size, NOCRED, &bp);
302 lblktosize(imp, rablock) < ip->i_size) {
303 rasize = blksize(imp, ip, rablock);
304 error = breadn(vp, lbn, size, &rablock,
305 &rasize, 1, NOCRED, &bp);
307 error = bread(vp, lbn, size, NOCRED, &bp);
309 n = min(n, size - bp->b_resid);
315 error = uiomove(bp->b_data + on, (int)n, uio);
317 } while (error == 0 && uio->uio_resid > 0 && n != 0);
322 * Structure for reading directories
325 struct dirent saveent;
326 struct dirent assocent;
327 struct dirent current;
339 iso_uiodir(idp,dp,off)
340 struct isoreaddir *idp;
346 dp->d_name[dp->d_namlen] = 0;
347 dp->d_reclen = GENERIC_DIRSIZ(dp);
349 if (idp->uio->uio_resid < dp->d_reclen) {
355 if (idp->ncookies <= 0) {
360 *idp->cookies++ = off;
364 if ((error = uiomove((caddr_t) dp,dp->d_reclen,idp->uio)) != 0)
372 struct isoreaddir *idp;
379 cl = idp->current.d_namlen;
380 cname = idp->current.d_name;
381 assoc = (cl > 1) && (*cname == ASSOCCHAR);
389 if (!(sl = dp->d_namlen)) {
391 sname = dp->d_name + 1;
392 sl = dp->d_namlen - 1;
396 || bcmp(sname,cname,sl)) {
397 if (idp->assocent.d_namlen) {
398 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0)
400 idp->assocent.d_namlen = 0;
402 if (idp->saveent.d_namlen) {
403 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0)
405 idp->saveent.d_namlen = 0;
409 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current);
411 idp->assocoff = idp->curroff;
412 bcopy(&idp->current,&idp->assocent,idp->current.d_reclen);
414 idp->saveoff = idp->curroff;
415 bcopy(&idp->current,&idp->saveent,idp->current.d_reclen);
421 * Vnode op for readdir
425 struct vop_readdir_args /* {
428 struct ucred *a_cred;
434 register struct uio *uio = ap->a_uio;
435 struct isoreaddir *idp;
436 struct vnode *vdp = ap->a_vp;
439 struct buf *bp = NULL;
440 struct iso_directory_record *ep;
441 int entryoffsetinblock;
448 u_long *cookies = NULL;
452 bmask = imp->im_bmask;
454 MALLOC(idp, struct isoreaddir *, sizeof(*idp), M_TEMP, M_WAITOK);
455 idp->saveent.d_namlen = idp->assocent.d_namlen = 0;
458 * Is it worth trying to figure out the type?
460 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type =
463 if (ap->a_ncookies == NULL) {
467 * Guess the number of cookies needed.
469 ncookies = uio->uio_resid / 16;
470 MALLOC(cookies, u_long *, ncookies * sizeof(u_int), M_TEMP,
472 idp->cookies = cookies;
473 idp->ncookies = ncookies;
476 idp->curroff = uio->uio_offset;
478 if ((entryoffsetinblock = idp->curroff & bmask) &&
479 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) {
483 endsearch = dp->i_size;
485 while (idp->curroff < endsearch) {
487 * If offset is on a block boundary,
488 * read the next directory block.
489 * Release previous if it exists.
491 if ((idp->curroff & bmask) == 0) {
495 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0)
497 entryoffsetinblock = 0;
500 * Get pointer to next entry.
502 ep = (struct iso_directory_record *)
503 ((char *)bp->b_data + entryoffsetinblock);
505 reclen = isonum_711(ep->length);
507 /* skip to next block, if any */
509 (idp->curroff & ~bmask) + imp->logical_block_size;
513 if (reclen < ISO_DIRECTORY_RECORD_SIZE) {
515 /* illegal entry, stop */
519 if (entryoffsetinblock + reclen > imp->logical_block_size) {
521 /* illegal directory, so stop looking */
525 idp->current.d_namlen = isonum_711(ep->name_len);
527 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) {
529 /* illegal entry, stop */
534 * The "inode number" is iso_start, not i_ino, as in
537 idp->current.d_fileno = isonum_711(ep->ext_attr_length) +
538 isonum_733(ep->extent);
540 idp->curroff += reclen;
542 switch (imp->iso_ftype) {
544 cd9660_rrip_getname(ep,idp->current.d_name, &namelen,
545 &idp->current.d_fileno,imp);
546 idp->current.d_namlen = (u_char)namelen;
547 if (idp->current.d_namlen)
548 error = iso_uiodir(idp,&idp->current,idp->curroff);
550 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/
551 strcpy(idp->current.d_name,"..");
552 if (idp->current.d_namlen == 1 && ep->name[0] == 0) {
553 idp->current.d_namlen = 1;
554 error = iso_uiodir(idp,&idp->current,idp->curroff);
555 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) {
556 idp->current.d_namlen = 2;
557 error = iso_uiodir(idp,&idp->current,idp->curroff);
559 isofntrans(ep->name,idp->current.d_namlen,
560 idp->current.d_name, &namelen,
561 imp->iso_ftype == ISO_FTYPE_9660,
562 isonum_711(ep->flags)&4,
564 idp->current.d_namlen = (u_char)namelen;
565 if (imp->iso_ftype == ISO_FTYPE_DEFAULT)
566 error = iso_shipdir(idp);
568 error = iso_uiodir(idp,&idp->current,idp->curroff);
574 entryoffsetinblock += reclen;
577 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) {
578 idp->current.d_namlen = 0;
579 error = iso_shipdir(idp);
584 if (ap->a_ncookies != NULL) {
586 free(cookies, M_TEMP);
589 * Work out the number of cookies actually used.
591 *ap->a_ncookies = ncookies - idp->ncookies;
592 *ap->a_cookies = cookies;
599 uio->uio_offset = idp->uio_off;
600 *ap->a_eofflag = idp->eofflag;
608 * Return target name of a symbolic link
609 * Shouldn't we get the parent vnode and read the data from there?
610 * This could eventually result in deadlocks in cd9660_lookup.
611 * But otherwise the block read here is in the block buffer two times.
613 typedef struct iso_directory_record ISODIR;
614 typedef struct iso_node ISONODE;
615 typedef struct iso_mnt ISOMNT;
618 struct vop_readlink_args /* {
621 struct ucred *a_cred;
637 if (imp->iso_ftype != ISO_FTYPE_RRIP)
641 * Get parents directory record block that this inode included.
643 error = bread(imp->im_devvp,
644 (ip->i_number >> imp->im_bshift) <<
645 (imp->im_bshift - DEV_BSHIFT),
646 imp->logical_block_size, NOCRED, &bp);
653 * Setup the directory pointer for this inode
655 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask));
658 * Just make sure, we have a right one....
659 * 1: Check not cross boundary on block
661 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length)
662 > (unsigned)imp->logical_block_size) {
669 * Abuse a namei buffer for now.
671 if (uio->uio_segflg == UIO_SYSSPACE)
672 symname = uio->uio_iov->iov_base;
674 symname = uma_zalloc(namei_zone, M_WAITOK);
677 * Ok, we just gathering a symbolic name in SL record.
679 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) {
680 if (uio->uio_segflg != UIO_SYSSPACE)
681 uma_zfree(namei_zone, symname);
686 * Don't forget before you leave from home ;-)
691 * return with the symbolic name to caller's.
693 if (uio->uio_segflg != UIO_SYSSPACE) {
694 error = uiomove(symname, symlen, uio);
695 uma_zfree(namei_zone, symname);
698 uio->uio_resid -= symlen;
699 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen;
700 uio->uio_iov->iov_len -= symlen;
705 * Calculate the logical to physical mapping if not done already,
706 * then call the device strategy routine.
710 struct vop_strategy_args /* {
715 register struct buf *bp = ap->a_bp;
716 register struct vnode *vp = bp->b_vp;
717 register struct iso_node *ip;
720 if (vp->v_type == VBLK || vp->v_type == VCHR)
721 panic("cd9660_strategy: spec");
722 if (bp->b_blkno == bp->b_lblkno) {
723 bp->b_blkno = (ip->iso_start + bp->b_lblkno) <<
724 (ip->i_mnt->im_bshift - DEV_BSHIFT);
725 if ((long)bp->b_blkno == -1) /* XXX: cut&paste junk ? */
728 if ((long)bp->b_blkno == -1) { /* XXX: cut&paste junk ? */
733 bp->b_dev = vp->v_rdev;
734 VOP_STRATEGY(vp, bp);
739 * Return POSIX pathconf information applicable to cd9660 filesystems.
743 struct vop_pathconf_args /* {
746 register_t *a_retval;
750 switch (ap->a_name) {
755 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP)
756 *ap->a_retval = NAME_MAX;
761 *ap->a_retval = PATH_MAX;
764 *ap->a_retval = PIPE_BUF;
766 case _PC_CHOWN_RESTRICTED:
779 * Global vfs data structures for cd9660
781 vop_t **cd9660_vnodeop_p;
782 static struct vnodeopv_entry_desc cd9660_vnodeop_entries[] = {
783 { &vop_default_desc, (vop_t *) vop_defaultop },
784 { &vop_access_desc, (vop_t *) cd9660_access },
785 { &vop_bmap_desc, (vop_t *) cd9660_bmap },
786 { &vop_cachedlookup_desc, (vop_t *) cd9660_lookup },
787 { &vop_getattr_desc, (vop_t *) cd9660_getattr },
788 { &vop_inactive_desc, (vop_t *) cd9660_inactive },
789 { &vop_ioctl_desc, (vop_t *) cd9660_ioctl },
790 { &vop_islocked_desc, (vop_t *) vop_stdislocked },
791 { &vop_lock_desc, (vop_t *) vop_stdlock },
792 { &vop_lookup_desc, (vop_t *) vfs_cache_lookup },
793 { &vop_pathconf_desc, (vop_t *) cd9660_pathconf },
794 { &vop_print_desc, (vop_t *) vop_null },
795 { &vop_read_desc, (vop_t *) cd9660_read },
796 { &vop_readdir_desc, (vop_t *) cd9660_readdir },
797 { &vop_readlink_desc, (vop_t *) cd9660_readlink },
798 { &vop_reclaim_desc, (vop_t *) cd9660_reclaim },
799 { &vop_setattr_desc, (vop_t *) cd9660_setattr },
800 { &vop_strategy_desc, (vop_t *) cd9660_strategy },
801 { &vop_unlock_desc, (vop_t *) vop_stdunlock },
804 static struct vnodeopv_desc cd9660_vnodeop_opv_desc =
805 { &cd9660_vnodeop_p, cd9660_vnodeop_entries };
806 VNODEOP_SET(cd9660_vnodeop_opv_desc);
809 * Special device vnode ops
811 vop_t **cd9660_specop_p;
812 static struct vnodeopv_entry_desc cd9660_specop_entries[] = {
813 { &vop_default_desc, (vop_t *) spec_vnoperate },
814 { &vop_access_desc, (vop_t *) cd9660_access },
815 { &vop_getattr_desc, (vop_t *) cd9660_getattr },
816 { &vop_inactive_desc, (vop_t *) cd9660_inactive },
817 { &vop_islocked_desc, (vop_t *) vop_stdislocked },
818 { &vop_lock_desc, (vop_t *) vop_stdlock },
819 { &vop_print_desc, (vop_t *) vop_null },
820 { &vop_reclaim_desc, (vop_t *) cd9660_reclaim },
821 { &vop_setattr_desc, (vop_t *) cd9660_setattr },
822 { &vop_unlock_desc, (vop_t *) vop_stdunlock },
825 static struct vnodeopv_desc cd9660_specop_opv_desc =
826 { &cd9660_specop_p, cd9660_specop_entries };
827 VNODEOP_SET(cd9660_specop_opv_desc);
829 vop_t **cd9660_fifoop_p;
830 static struct vnodeopv_entry_desc cd9660_fifoop_entries[] = {
831 { &vop_default_desc, (vop_t *) fifo_vnoperate },
832 { &vop_access_desc, (vop_t *) cd9660_access },
833 { &vop_getattr_desc, (vop_t *) cd9660_getattr },
834 { &vop_inactive_desc, (vop_t *) cd9660_inactive },
835 { &vop_islocked_desc, (vop_t *) vop_stdislocked },
836 { &vop_lock_desc, (vop_t *) vop_stdlock },
837 { &vop_print_desc, (vop_t *) vop_null },
838 { &vop_reclaim_desc, (vop_t *) cd9660_reclaim },
839 { &vop_setattr_desc, (vop_t *) cd9660_setattr },
840 { &vop_unlock_desc, (vop_t *) vop_stdunlock },
843 static struct vnodeopv_desc cd9660_fifoop_opv_desc =
844 { &cd9660_fifoop_p, cd9660_fifoop_entries };
846 VNODEOP_SET(cd9660_fifoop_opv_desc);