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
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28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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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;
92 struct vnode *vp = ap->a_vp;
93 struct vattr *vap = ap->a_vap;
95 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
96 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
97 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL)
99 if (vap->va_size != (u_quad_t)VNOVAL) {
100 switch (vp->v_type) {
120 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC.
121 * The mode is shifted to select the owner/group/other fields. The
122 * super user is granted all permissions.
127 struct vop_access_args /* {
130 struct ucred *a_cred;
134 struct vnode *vp = ap->a_vp;
135 struct iso_node *ip = VTOI(vp);
136 mode_t mode = ap->a_mode;
138 if (vp->v_type == VCHR || vp->v_type == VBLK)
142 * Disallow write attempts unless the file is a socket,
143 * fifo, or a block or character device resident on the
147 switch (vp->v_type) {
158 return (vaccess(vp->v_type, ip->inode.iso_mode, ip->inode.iso_uid,
159 ip->inode.iso_gid, ap->a_mode, ap->a_cred, NULL));
164 struct vop_open_args /* {
167 struct ucred *a_cred;
172 struct vnode *vp = ap->a_vp;
173 struct iso_node *ip = VTOI(vp);
175 if (vp->v_type == VCHR || vp->v_type == VBLK)
178 vnode_create_vobject(vp, ip->i_size, ap->a_td);
185 struct vop_getattr_args /* {
188 struct ucred *a_cred;
193 struct vnode *vp = ap->a_vp;
194 struct vattr *vap = ap->a_vap;
195 struct iso_node *ip = VTOI(vp);
197 vap->va_fsid = dev2udev(ip->i_mnt->im_dev);
198 vap->va_fileid = ip->i_number;
200 vap->va_mode = ip->inode.iso_mode;
201 vap->va_nlink = ip->inode.iso_links;
202 vap->va_uid = ip->inode.iso_uid;
203 vap->va_gid = ip->inode.iso_gid;
204 vap->va_atime = ip->inode.iso_atime;
205 vap->va_mtime = ip->inode.iso_mtime;
206 vap->va_ctime = ip->inode.iso_ctime;
207 vap->va_rdev = ip->inode.iso_rdev;
209 vap->va_size = (u_quad_t) ip->i_size;
210 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) {
211 struct vop_readlink_args rdlnk;
216 MALLOC(cp, char *, MAXPATHLEN, M_TEMP, M_WAITOK);
218 aiov.iov_len = MAXPATHLEN;
219 auio.uio_iov = &aiov;
222 auio.uio_rw = UIO_READ;
223 auio.uio_segflg = UIO_SYSSPACE;
224 auio.uio_td = ap->a_td;
225 auio.uio_resid = MAXPATHLEN;
227 rdlnk.a_vp = ap->a_vp;
228 rdlnk.a_cred = ap->a_cred;
229 if (cd9660_readlink(&rdlnk) == 0)
230 vap->va_size = MAXPATHLEN - auio.uio_resid;
235 vap->va_blocksize = ip->i_mnt->logical_block_size;
236 vap->va_bytes = (u_quad_t) ip->i_size;
237 vap->va_type = vp->v_type;
243 * Vnode op for ioctl.
247 struct vop_ioctl_args /* {
252 struct ucred *a_cred;
256 struct vnode *vp = ap->a_vp;
257 struct iso_node *ip = VTOI(vp);
259 if (vp->v_type == VCHR || vp->v_type == VBLK)
262 switch (ap->a_command) {
265 *(int *)(ap->a_data) = ip->iso_start;
273 * Vnode op for reading.
277 struct vop_read_args /* {
281 struct ucred *a_cred;
284 struct vnode *vp = ap->a_vp;
285 struct uio *uio = ap->a_uio;
286 struct iso_node *ip = VTOI(vp);
289 daddr_t lbn, rablock;
291 int rasize, error = 0;
295 if (vp->v_type == VCHR || vp->v_type == VBLK)
298 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
300 if (uio->uio_resid == 0)
302 if (uio->uio_offset < 0)
304 ip->i_flag |= IN_ACCESS;
307 lbn = lblkno(imp, uio->uio_offset);
308 on = blkoff(imp, uio->uio_offset);
309 n = min((u_int)(imp->logical_block_size - on),
311 diff = (off_t)ip->i_size - uio->uio_offset;
316 size = blksize(imp, ip, lbn);
318 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) {
319 if (lblktosize(imp, rablock) < ip->i_size)
320 error = cluster_read(vp, (off_t)ip->i_size,
321 lbn, size, NOCRED, uio->uio_resid,
322 (ap->a_ioflag >> 16), &bp);
324 error = bread(vp, lbn, size, NOCRED, &bp);
327 lblktosize(imp, rablock) < ip->i_size) {
328 rasize = blksize(imp, ip, rablock);
329 error = breadn(vp, lbn, size, &rablock,
330 &rasize, 1, NOCRED, &bp);
332 error = bread(vp, lbn, size, NOCRED, &bp);
334 n = min(n, size - bp->b_resid);
340 error = uiomove(bp->b_data + on, (int)n, uio);
342 } while (error == 0 && uio->uio_resid > 0 && n != 0);
347 * Structure for reading directories
350 struct dirent saveent;
351 struct dirent assocent;
352 struct dirent current;
364 iso_uiodir(idp,dp,off)
365 struct isoreaddir *idp;
371 dp->d_name[dp->d_namlen] = 0;
372 dp->d_reclen = GENERIC_DIRSIZ(dp);
374 if (idp->uio->uio_resid < dp->d_reclen) {
380 if (idp->ncookies <= 0) {
385 *idp->cookies++ = off;
389 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0)
397 struct isoreaddir *idp;
404 cl = idp->current.d_namlen;
405 cname = idp->current.d_name;
406 assoc = (cl > 1) && (*cname == ASSOCCHAR);
414 if (!(sl = dp->d_namlen)) {
416 sname = dp->d_name + 1;
417 sl = dp->d_namlen - 1;
421 || bcmp(sname,cname,sl)) {
422 if (idp->assocent.d_namlen) {
423 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0)
425 idp->assocent.d_namlen = 0;
427 if (idp->saveent.d_namlen) {
428 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0)
430 idp->saveent.d_namlen = 0;
434 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current);
436 idp->assocoff = idp->curroff;
437 bcopy(&idp->current,&idp->assocent,idp->current.d_reclen);
439 idp->saveoff = idp->curroff;
440 bcopy(&idp->current,&idp->saveent,idp->current.d_reclen);
446 * Vnode op for readdir
450 struct vop_readdir_args /* {
453 struct ucred *a_cred;
459 struct uio *uio = ap->a_uio;
460 struct isoreaddir *idp;
461 struct vnode *vdp = ap->a_vp;
464 struct buf *bp = NULL;
465 struct iso_directory_record *ep;
466 int entryoffsetinblock;
473 u_long *cookies = NULL;
477 bmask = imp->im_bmask;
479 MALLOC(idp, struct isoreaddir *, sizeof(*idp), M_TEMP, M_WAITOK);
480 idp->saveent.d_namlen = idp->assocent.d_namlen = 0;
483 * Is it worth trying to figure out the type?
485 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type =
488 if (ap->a_ncookies == NULL) {
492 * Guess the number of cookies needed.
494 ncookies = uio->uio_resid / 16;
495 MALLOC(cookies, u_long *, ncookies * sizeof(u_long),
497 idp->cookies = cookies;
498 idp->ncookies = ncookies;
501 idp->curroff = uio->uio_offset;
502 idp->uio_off = uio->uio_offset;
504 if ((entryoffsetinblock = idp->curroff & bmask) &&
505 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) {
509 endsearch = dp->i_size;
511 while (idp->curroff < endsearch) {
513 * If offset is on a block boundary,
514 * read the next directory block.
515 * Release previous if it exists.
517 if ((idp->curroff & bmask) == 0) {
521 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0)
523 entryoffsetinblock = 0;
526 * Get pointer to next entry.
528 ep = (struct iso_directory_record *)
529 ((char *)bp->b_data + entryoffsetinblock);
531 reclen = isonum_711(ep->length);
533 /* skip to next block, if any */
535 (idp->curroff & ~bmask) + imp->logical_block_size;
539 if (reclen < ISO_DIRECTORY_RECORD_SIZE) {
541 /* illegal entry, stop */
545 if (entryoffsetinblock + reclen > imp->logical_block_size) {
547 /* illegal directory, so stop looking */
551 idp->current.d_namlen = isonum_711(ep->name_len);
553 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) {
555 /* illegal entry, stop */
559 if (isonum_711(ep->flags)&2)
560 idp->current.d_fileno = isodirino(ep, imp);
562 idp->current.d_fileno = dbtob(bp->b_blkno) +
565 idp->curroff += reclen;
567 switch (imp->iso_ftype) {
569 cd9660_rrip_getname(ep,idp->current.d_name, &namelen,
570 &idp->current.d_fileno,imp);
571 idp->current.d_namlen = (u_char)namelen;
572 if (idp->current.d_namlen)
573 error = iso_uiodir(idp,&idp->current,idp->curroff);
575 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/
576 strcpy(idp->current.d_name,"..");
577 if (idp->current.d_namlen == 1 && ep->name[0] == 0) {
578 idp->current.d_namlen = 1;
579 error = iso_uiodir(idp,&idp->current,idp->curroff);
580 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) {
581 idp->current.d_namlen = 2;
582 error = iso_uiodir(idp,&idp->current,idp->curroff);
584 isofntrans(ep->name,idp->current.d_namlen,
585 idp->current.d_name, &namelen,
586 imp->iso_ftype == ISO_FTYPE_9660,
587 isonum_711(ep->flags)&4,
591 idp->current.d_namlen = (u_char)namelen;
592 if (imp->iso_ftype == ISO_FTYPE_DEFAULT)
593 error = iso_shipdir(idp);
595 error = iso_uiodir(idp,&idp->current,idp->curroff);
601 entryoffsetinblock += reclen;
604 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) {
605 idp->current.d_namlen = 0;
606 error = iso_shipdir(idp);
611 if (ap->a_ncookies != NULL) {
613 free(cookies, M_TEMP);
616 * Work out the number of cookies actually used.
618 *ap->a_ncookies = ncookies - idp->ncookies;
619 *ap->a_cookies = cookies;
626 uio->uio_offset = idp->uio_off;
627 *ap->a_eofflag = idp->eofflag;
635 * Return target name of a symbolic link
636 * Shouldn't we get the parent vnode and read the data from there?
637 * This could eventually result in deadlocks in cd9660_lookup.
638 * But otherwise the block read here is in the block buffer two times.
640 typedef struct iso_directory_record ISODIR;
641 typedef struct iso_node ISONODE;
642 typedef struct iso_mnt ISOMNT;
645 struct vop_readlink_args /* {
648 struct ucred *a_cred;
664 if (imp->iso_ftype != ISO_FTYPE_RRIP)
668 * Get parents directory record block that this inode included.
670 error = bread(imp->im_devvp,
671 (ip->i_number >> imp->im_bshift) <<
672 (imp->im_bshift - DEV_BSHIFT),
673 imp->logical_block_size, NOCRED, &bp);
680 * Setup the directory pointer for this inode
682 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask));
685 * Just make sure, we have a right one....
686 * 1: Check not cross boundary on block
688 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length)
689 > (unsigned)imp->logical_block_size) {
696 * Abuse a namei buffer for now.
698 if (uio->uio_segflg == UIO_SYSSPACE)
699 symname = uio->uio_iov->iov_base;
701 symname = uma_zalloc(namei_zone, M_WAITOK);
704 * Ok, we just gathering a symbolic name in SL record.
706 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) {
707 if (uio->uio_segflg != UIO_SYSSPACE)
708 uma_zfree(namei_zone, symname);
713 * Don't forget before you leave from home ;-)
718 * return with the symbolic name to caller's.
720 if (uio->uio_segflg != UIO_SYSSPACE) {
721 error = uiomove(symname, symlen, uio);
722 uma_zfree(namei_zone, symname);
725 uio->uio_resid -= symlen;
726 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen;
727 uio->uio_iov->iov_len -= symlen;
732 * Calculate the logical to physical mapping if not done already,
733 * then call the device strategy routine.
737 struct vop_strategy_args /* {
742 struct buf *bp = ap->a_bp;
743 struct vnode *vp = ap->a_vp;
748 if (vp->v_type == VBLK || vp->v_type == VCHR)
749 panic("cd9660_strategy: spec");
750 if (bp->b_blkno == bp->b_lblkno) {
751 bp->b_blkno = (ip->iso_start + bp->b_lblkno) <<
752 (ip->i_mnt->im_bshift - DEV_BSHIFT);
753 if ((long)bp->b_blkno == -1) /* XXX: cut&paste junk ? */
756 if ((long)bp->b_blkno == -1) { /* XXX: cut&paste junk ? */
760 bp->b_iooffset = dbtob(bp->b_blkno);
761 bo = ip->i_mnt->im_bo;
767 * Return POSIX pathconf information applicable to cd9660 filesystems.
771 struct vop_pathconf_args /* {
774 register_t *a_retval;
778 switch (ap->a_name) {
783 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP)
784 *ap->a_retval = NAME_MAX;
789 *ap->a_retval = PATH_MAX;
792 *ap->a_retval = PIPE_BUF;
794 case _PC_CHOWN_RESTRICTED:
807 * Vnode pointer to File handle
811 struct vop_vptofh_args /* {
816 struct iso_node *ip = VTOI(ap->a_vp);
819 ifhp = (struct ifid *)ap->a_fhp;
820 ifhp->ifid_len = sizeof(struct ifid);
822 ifhp->ifid_ino = ip->i_number;
823 ifhp->ifid_start = ip->iso_start;
826 printf("vptofh: ino %d, start %ld\n",
827 ifhp->ifid_ino,ifhp->ifid_start);
833 * Global vfs data structures for cd9660
835 struct vop_vector cd9660_vnodeops = {
836 .vop_default = &default_vnodeops,
837 .vop_open = cd9660_open,
838 .vop_access = cd9660_access,
839 .vop_bmap = cd9660_bmap,
840 .vop_cachedlookup = cd9660_lookup,
841 .vop_getattr = cd9660_getattr,
842 .vop_inactive = cd9660_inactive,
843 .vop_ioctl = cd9660_ioctl,
844 .vop_lookup = vfs_cache_lookup,
845 .vop_pathconf = cd9660_pathconf,
846 .vop_read = cd9660_read,
847 .vop_readdir = cd9660_readdir,
848 .vop_readlink = cd9660_readlink,
849 .vop_reclaim = cd9660_reclaim,
850 .vop_setattr = cd9660_setattr,
851 .vop_strategy = cd9660_strategy,
852 .vop_vptofh = cd9660_vptofh,
856 * Special device vnode ops
859 struct vop_vector cd9660_fifoops = {
860 .vop_default = &fifo_specops,
861 .vop_access = cd9660_access,
862 .vop_getattr = cd9660_getattr,
863 .vop_inactive = cd9660_inactive,
864 .vop_reclaim = cd9660_reclaim,
865 .vop_setattr = cd9660_setattr,
866 .vop_vptofh = cd9660_vptofh,