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 * 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
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28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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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 <sys/malloc.h>
51 #include <sys/dirent.h>
52 #include <sys/unistd.h>
53 #include <sys/filio.h>
54 #include <sys/sysctl.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;
78 static vop_getpages_t cd9660_getpages;
81 * Setattr call. Only allowed for block and character special devices.
85 struct vop_setattr_args /* {
86 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 accmode_t accmode = ap->a_accmode;
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
146 if (accmode & VWRITE) {
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_accmode, 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;
192 struct vnode *vp = ap->a_vp;
193 struct vattr *vap = ap->a_vap;
194 struct iso_node *ip = VTOI(vp);
196 vap->va_fsid = dev2udev(ip->i_mnt->im_dev);
197 vap->va_fileid = ip->i_number;
199 vap->va_mode = ip->inode.iso_mode;
200 vap->va_nlink = ip->inode.iso_links;
201 vap->va_uid = ip->inode.iso_uid;
202 vap->va_gid = ip->inode.iso_gid;
203 vap->va_atime = ip->inode.iso_atime;
204 vap->va_mtime = ip->inode.iso_mtime;
205 vap->va_ctime = ip->inode.iso_ctime;
206 vap->va_rdev = ip->inode.iso_rdev;
208 vap->va_size = (u_quad_t) ip->i_size;
209 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) {
210 struct vop_readlink_args rdlnk;
215 cp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
217 aiov.iov_len = MAXPATHLEN;
218 auio.uio_iov = &aiov;
221 auio.uio_rw = UIO_READ;
222 auio.uio_segflg = UIO_SYSSPACE;
223 auio.uio_td = curthread;
224 auio.uio_resid = MAXPATHLEN;
226 rdlnk.a_vp = ap->a_vp;
227 rdlnk.a_cred = ap->a_cred;
228 if (cd9660_readlink(&rdlnk) == 0)
229 vap->va_size = MAXPATHLEN - auio.uio_resid;
234 vap->va_blocksize = ip->i_mnt->logical_block_size;
235 vap->va_bytes = (u_quad_t) ip->i_size;
236 vap->va_type = vp->v_type;
242 * Vnode op for ioctl.
246 struct vop_ioctl_args /* {
251 struct ucred *a_cred;
260 vn_lock(vp, LK_SHARED | LK_RETRY);
261 if (vp->v_iflag & VI_DOOMED) {
265 if (vp->v_type == VCHR || vp->v_type == VBLK) {
273 switch (ap->a_command) {
275 *(int *)(ap->a_data) = ip->iso_start;
287 * Vnode op for reading.
291 struct vop_read_args /* {
295 struct ucred *a_cred;
298 struct vnode *vp = ap->a_vp;
299 struct uio *uio = ap->a_uio;
300 struct iso_node *ip = VTOI(vp);
303 daddr_t lbn, rablock;
305 int rasize, error = 0;
309 if (vp->v_type == VCHR || vp->v_type == VBLK)
312 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
314 if (uio->uio_resid == 0)
316 if (uio->uio_offset < 0)
320 lbn = lblkno(imp, uio->uio_offset);
321 on = blkoff(imp, uio->uio_offset);
322 n = MIN(imp->logical_block_size - on, uio->uio_resid);
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), 0, &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);
348 n = MIN(n, size - bp->b_resid);
350 error = uiomove(bp->b_data + on, (int)n, uio);
352 } while (error == 0 && uio->uio_resid > 0 && n != 0);
357 * Structure for reading directories
360 struct dirent saveent;
361 struct dirent assocent;
362 struct dirent current;
374 iso_uiodir(idp,dp,off)
375 struct isoreaddir *idp;
381 dp->d_name[dp->d_namlen] = 0;
382 dp->d_reclen = GENERIC_DIRSIZ(dp);
384 if (idp->uio->uio_resid < dp->d_reclen) {
390 if (idp->ncookies <= 0) {
395 *idp->cookies++ = off;
399 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0)
407 struct isoreaddir *idp;
414 cl = idp->current.d_namlen;
415 cname = idp->current.d_name;
416 assoc = (cl > 1) && (*cname == ASSOCCHAR);
424 if (!(sl = dp->d_namlen)) {
426 sname = dp->d_name + 1;
427 sl = dp->d_namlen - 1;
431 || bcmp(sname,cname,sl)) {
432 if (idp->assocent.d_namlen) {
433 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0)
435 idp->assocent.d_namlen = 0;
437 if (idp->saveent.d_namlen) {
438 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0)
440 idp->saveent.d_namlen = 0;
444 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current);
446 idp->assocoff = idp->curroff;
447 bcopy(&idp->current,&idp->assocent,idp->current.d_reclen);
449 idp->saveoff = idp->curroff;
450 bcopy(&idp->current,&idp->saveent,idp->current.d_reclen);
456 * Vnode op for readdir
460 struct vop_readdir_args /* {
463 struct ucred *a_cred;
469 struct uio *uio = ap->a_uio;
470 struct isoreaddir *idp;
471 struct vnode *vdp = ap->a_vp;
474 struct buf *bp = NULL;
475 struct iso_directory_record *ep;
476 int entryoffsetinblock;
483 u_long *cookies = NULL;
488 bmask = imp->im_bmask;
490 idp = malloc(sizeof(*idp), M_TEMP, M_WAITOK);
491 idp->saveent.d_namlen = idp->assocent.d_namlen = 0;
494 * Is it worth trying to figure out the type?
496 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type =
499 if (ap->a_ncookies == NULL) {
503 * Guess the number of cookies needed.
505 ncookies = uio->uio_resid / 16;
506 cookies = malloc(ncookies * sizeof(u_long),
508 idp->cookies = cookies;
509 idp->ncookies = ncookies;
512 idp->curroff = uio->uio_offset;
513 idp->uio_off = uio->uio_offset;
515 if ((entryoffsetinblock = idp->curroff & bmask) &&
516 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) {
520 endsearch = dp->i_size;
522 while (idp->curroff < endsearch) {
524 * If offset is on a block boundary,
525 * read the next directory block.
526 * Release previous if it exists.
528 if ((idp->curroff & bmask) == 0) {
532 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0)
534 entryoffsetinblock = 0;
537 * Get pointer to next entry.
539 ep = (struct iso_directory_record *)
540 ((char *)bp->b_data + entryoffsetinblock);
542 reclen = isonum_711(ep->length);
544 /* skip to next block, if any */
546 (idp->curroff & ~bmask) + imp->logical_block_size;
550 if (reclen < ISO_DIRECTORY_RECORD_SIZE) {
552 /* illegal entry, stop */
556 if (entryoffsetinblock + reclen > imp->logical_block_size) {
558 /* illegal directory, so stop looking */
562 idp->current.d_namlen = isonum_711(ep->name_len);
564 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) {
566 /* illegal entry, stop */
570 if (isonum_711(ep->flags)&2)
571 idp->current.d_fileno = isodirino(ep, imp);
573 idp->current.d_fileno = dbtob(bp->b_blkno) +
576 idp->curroff += reclen;
578 switch (imp->iso_ftype) {
580 ino = idp->current.d_fileno;
581 cd9660_rrip_getname(ep, idp->current.d_name, &namelen,
583 idp->current.d_fileno = ino;
584 idp->current.d_namlen = (u_char)namelen;
585 if (idp->current.d_namlen)
586 error = iso_uiodir(idp,&idp->current,idp->curroff);
588 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/
589 strcpy(idp->current.d_name,"..");
590 if (idp->current.d_namlen == 1 && ep->name[0] == 0) {
591 idp->current.d_namlen = 1;
592 error = iso_uiodir(idp,&idp->current,idp->curroff);
593 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) {
594 idp->current.d_namlen = 2;
595 error = iso_uiodir(idp,&idp->current,idp->curroff);
597 isofntrans(ep->name,idp->current.d_namlen,
598 idp->current.d_name, &namelen,
599 imp->iso_ftype == ISO_FTYPE_9660,
600 isonum_711(ep->flags)&4,
604 idp->current.d_namlen = (u_char)namelen;
605 if (imp->iso_ftype == ISO_FTYPE_DEFAULT)
606 error = iso_shipdir(idp);
608 error = iso_uiodir(idp,&idp->current,idp->curroff);
614 entryoffsetinblock += reclen;
617 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) {
618 idp->current.d_namlen = 0;
619 error = iso_shipdir(idp);
624 if (ap->a_ncookies != NULL) {
626 free(cookies, M_TEMP);
629 * Work out the number of cookies actually used.
631 *ap->a_ncookies = ncookies - idp->ncookies;
632 *ap->a_cookies = cookies;
639 uio->uio_offset = idp->uio_off;
640 *ap->a_eofflag = idp->eofflag;
648 * Return target name of a symbolic link
649 * Shouldn't we get the parent vnode and read the data from there?
650 * This could eventually result in deadlocks in cd9660_lookup.
651 * But otherwise the block read here is in the block buffer two times.
653 typedef struct iso_directory_record ISODIR;
654 typedef struct iso_node ISONODE;
655 typedef struct iso_mnt ISOMNT;
658 struct vop_readlink_args /* {
661 struct ucred *a_cred;
677 if (imp->iso_ftype != ISO_FTYPE_RRIP)
681 * Get parents directory record block that this inode included.
683 error = bread(imp->im_devvp,
684 (ip->i_number >> imp->im_bshift) <<
685 (imp->im_bshift - DEV_BSHIFT),
686 imp->logical_block_size, NOCRED, &bp);
693 * Setup the directory pointer for this inode
695 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask));
698 * Just make sure, we have a right one....
699 * 1: Check not cross boundary on block
701 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length)
702 > (unsigned)imp->logical_block_size) {
709 * Abuse a namei buffer for now.
711 if (uio->uio_segflg == UIO_SYSSPACE)
712 symname = uio->uio_iov->iov_base;
714 symname = uma_zalloc(namei_zone, M_WAITOK);
717 * Ok, we just gathering a symbolic name in SL record.
719 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) {
720 if (uio->uio_segflg != UIO_SYSSPACE)
721 uma_zfree(namei_zone, symname);
726 * Don't forget before you leave from home ;-)
731 * return with the symbolic name to caller's.
733 if (uio->uio_segflg != UIO_SYSSPACE) {
734 error = uiomove(symname, symlen, uio);
735 uma_zfree(namei_zone, symname);
738 uio->uio_resid -= symlen;
739 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen;
740 uio->uio_iov->iov_len -= symlen;
745 * Calculate the logical to physical mapping if not done already,
746 * then call the device strategy routine.
750 struct vop_strategy_args /* {
755 struct buf *bp = ap->a_bp;
756 struct vnode *vp = ap->a_vp;
761 if (vp->v_type == VBLK || vp->v_type == VCHR)
762 panic("cd9660_strategy: spec");
763 if (bp->b_blkno == bp->b_lblkno) {
764 bp->b_blkno = (ip->iso_start + bp->b_lblkno) <<
765 (ip->i_mnt->im_bshift - DEV_BSHIFT);
767 bp->b_iooffset = dbtob(bp->b_blkno);
768 bo = ip->i_mnt->im_bo;
774 * Return POSIX pathconf information applicable to cd9660 filesystems.
778 struct vop_pathconf_args /* {
781 register_t *a_retval;
785 switch (ap->a_name) {
790 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP)
791 *ap->a_retval = NAME_MAX;
796 *ap->a_retval = PATH_MAX;
799 *ap->a_retval = PIPE_BUF;
801 case _PC_CHOWN_RESTRICTED:
814 * Vnode pointer to File handle
818 struct vop_vptofh_args /* {
824 struct iso_node *ip = VTOI(ap->a_vp);
826 ifh.ifid_len = sizeof(struct ifid);
828 ifh.ifid_ino = ip->i_number;
829 ifh.ifid_start = ip->iso_start;
831 * This intentionally uses sizeof(ifh) in order to not copy stack
834 memcpy(ap->a_fhp, &ifh, sizeof(ifh));
837 printf("vptofh: ino %jd, start %ld\n",
838 (uintmax_t)ifh.ifid_ino, ifh.ifid_start);
844 SYSCTL_NODE(_vfs, OID_AUTO, cd9660, CTLFLAG_RW, 0, "cd9660 filesystem");
845 static int use_buf_pager = 1;
846 SYSCTL_INT(_vfs_cd9660, OID_AUTO, use_buf_pager, CTLFLAG_RWTUN,
848 "Use buffer pager instead of bmap");
851 cd9660_gbp_getblkno(struct vnode *vp, vm_ooffset_t off)
854 return (lblkno(VTOI(vp)->i_mnt, off));
858 cd9660_gbp_getblksz(struct vnode *vp, daddr_t lbn)
863 return (blksize(ip->i_mnt, ip, lbn));
867 cd9660_getpages(struct vop_getpages_args *ap)
872 if (vp->v_type == VCHR || vp->v_type == VBLK)
876 return (vfs_bio_getpages(vp, ap->a_m, ap->a_count,
877 ap->a_rbehind, ap->a_rahead, cd9660_gbp_getblkno,
878 cd9660_gbp_getblksz));
879 return (vnode_pager_generic_getpages(vp, ap->a_m, ap->a_count,
880 ap->a_rbehind, ap->a_rahead, NULL, NULL));
884 * Global vfs data structures for cd9660
886 struct vop_vector cd9660_vnodeops = {
887 .vop_default = &default_vnodeops,
888 .vop_open = cd9660_open,
889 .vop_access = cd9660_access,
890 .vop_bmap = cd9660_bmap,
891 .vop_cachedlookup = cd9660_lookup,
892 .vop_getattr = cd9660_getattr,
893 .vop_inactive = cd9660_inactive,
894 .vop_ioctl = cd9660_ioctl,
895 .vop_lookup = vfs_cache_lookup,
896 .vop_pathconf = cd9660_pathconf,
897 .vop_read = cd9660_read,
898 .vop_readdir = cd9660_readdir,
899 .vop_readlink = cd9660_readlink,
900 .vop_reclaim = cd9660_reclaim,
901 .vop_setattr = cd9660_setattr,
902 .vop_strategy = cd9660_strategy,
903 .vop_vptofh = cd9660_vptofh,
904 .vop_getpages = cd9660_getpages,
908 * Special device vnode ops
911 struct vop_vector cd9660_fifoops = {
912 .vop_default = &fifo_specops,
913 .vop_access = cd9660_access,
914 .vop_getattr = cd9660_getattr,
915 .vop_inactive = cd9660_inactive,
916 .vop_reclaim = cd9660_reclaim,
917 .vop_setattr = cd9660_setattr,
918 .vop_vptofh = cd9660_vptofh,