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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38 * @(#)cd9660_vnops.c 8.19 (Berkeley) 5/27/95
39 * $FreeBSD: src/sys/isofs/cd9660/cd9660_vnops.c,v 1.62 1999/12/15 23:01:51 eivind Exp $
40 * $DragonFly: src/sys/vfs/isofs/cd9660/cd9660_vnops.c,v 1.18 2006/01/13 21:09:27 swildner Exp $
43 #include <sys/param.h>
44 #include <sys/systm.h>
46 #include <sys/namei.h>
47 #include <sys/kernel.h>
50 #include <sys/mount.h>
51 #include <sys/vnode.h>
52 #include <vfs/fifofs/fifo.h>
53 #include <sys/malloc.h>
54 #include <sys/dirent.h>
55 #include <sys/unistd.h>
56 #include <sys/filio.h>
57 #include <sys/lockf.h>
60 #include <vm/vm_zone.h>
61 #include <vm/vnode_pager.h>
64 #include "cd9660_node.h"
67 static int cd9660_access (struct vop_access_args *);
68 static int cd9660_advlock (struct vop_advlock_args *);
69 static int cd9660_getattr (struct vop_getattr_args *);
70 static int cd9660_ioctl (struct vop_ioctl_args *);
71 static int cd9660_pathconf (struct vop_pathconf_args *);
72 static int cd9660_read (struct vop_read_args *);
73 static int cd9660_setattr (struct vop_setattr_args *);
75 static int iso_uiodir (struct isoreaddir *idp, struct dirent *dp,
77 static int iso_shipdir (struct isoreaddir *idp);
78 static int cd9660_readdir (struct vop_readdir_args *);
79 static int cd9660_readlink (struct vop_readlink_args *ap);
80 static int cd9660_strategy (struct vop_strategy_args *);
81 static int cd9660_print (struct vop_print_args *);
82 static int cd9660_getpages (struct vop_getpages_args *);
83 static int cd9660_putpages (struct vop_putpages_args *);
86 * Setattr call. Only allowed for block and character special devices.
88 * cd9660_setattr(struct vnodeop_desc *a_desc, struct vnode *a_vp,
89 * struct vattr *a_vap, struct ucred *a_cred, struct proc *a_p)
92 cd9660_setattr(struct vop_setattr_args *ap)
94 struct vnode *vp = ap->a_vp;
95 struct vattr *vap = ap->a_vap;
97 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
98 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
99 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL)
101 if (vap->va_size != (u_quad_t)VNOVAL) {
102 switch (vp->v_type) {
121 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC.
122 * The mode is shifted to select the owner/group/other fields. The
123 * super user is granted all permissions.
125 * cd9660_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
130 cd9660_access(struct vop_access_args *ap)
132 struct vnode *vp = ap->a_vp;
133 struct iso_node *ip = VTOI(vp);
134 struct ucred *cred = ap->a_cred;
135 mode_t mask, mode = ap->a_mode;
140 * Disallow write attempts unless the file is a socket,
141 * fifo, or a block or character device resident on the
145 switch (vp->v_type) {
156 /* User id 0 always gets access. */
157 if (cred->cr_uid == 0)
162 /* Otherwise, check the owner. */
163 if (cred->cr_uid == ip->inode.iso_uid) {
170 return ((ip->inode.iso_mode & mask) == mask ? 0 : EACCES);
173 /* Otherwise, check the groups. */
174 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
175 if (ip->inode.iso_gid == *gp) {
182 return ((ip->inode.iso_mode & mask) == mask ?
186 /* Otherwise, check everyone else. */
193 return ((ip->inode.iso_mode & mask) == mask ? 0 : EACCES);
197 * cd9660_getattr(struct vnode *a_vp, struct vattr *a_vap, struct thread *a_td)
200 cd9660_getattr(struct vop_getattr_args *ap)
202 struct vnode *vp = ap->a_vp;
203 struct vattr *vap = ap->a_vap;
204 struct iso_node *ip = VTOI(vp);
206 vap->va_fsid = dev2udev(ip->i_dev);
207 vap->va_fileid = ip->i_number;
209 vap->va_mode = ip->inode.iso_mode;
210 vap->va_nlink = ip->inode.iso_links;
211 vap->va_uid = ip->inode.iso_uid;
212 vap->va_gid = ip->inode.iso_gid;
213 vap->va_atime = ip->inode.iso_atime;
214 vap->va_mtime = ip->inode.iso_mtime;
215 vap->va_ctime = ip->inode.iso_ctime;
216 vap->va_rdev = ip->inode.iso_rdev;
218 vap->va_size = (u_quad_t)(unsigned long)ip->i_size;
219 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) {
220 struct vop_readlink_args rdlnk;
225 MALLOC(cp, char *, MAXPATHLEN, M_TEMP, M_WAITOK);
227 aiov.iov_len = MAXPATHLEN;
228 auio.uio_iov = &aiov;
231 auio.uio_rw = UIO_READ;
232 auio.uio_segflg = UIO_SYSSPACE;
233 auio.uio_td = ap->a_td;
234 auio.uio_resid = MAXPATHLEN;
236 rdlnk.a_vp = ap->a_vp;
237 rdlnk.a_cred = proc0.p_ucred; /* use root cred */
238 if (cd9660_readlink(&rdlnk) == 0)
239 vap->va_size = MAXPATHLEN - auio.uio_resid;
244 vap->va_blocksize = ip->i_mnt->logical_block_size;
245 vap->va_bytes = (u_quad_t) ip->i_size;
246 vap->va_type = vp->v_type;
252 * Vnode op for ioctl.
254 * cd9660_ioctl(struct vnode *a_vp, int a_command, caddr_t a_data,
255 * int a_fflag, struct ucred *a_cred, struct proc *a_p)
258 cd9660_ioctl(struct vop_ioctl_args *ap)
260 struct vnode *vp = ap->a_vp;
261 struct iso_node *ip = VTOI(vp);
263 switch (ap->a_command) {
266 *(int *)(ap->a_data) = ip->iso_start;
274 * Vnode op for reading.
276 * cd9660_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
277 * struct ucred *a_cred)
280 cd9660_read(struct vop_read_args *ap)
282 struct vnode *vp = ap->a_vp;
283 struct uio *uio = ap->a_uio;
284 struct iso_node *ip = VTOI(vp);
287 daddr_t lbn, rablock;
289 int rasize, error = 0;
293 seqcount = ap->a_ioflag >> 16;
295 if (uio->uio_resid == 0)
297 if (uio->uio_offset < 0)
299 ip->i_flag |= IN_ACCESS;
302 lbn = lblkno(imp, uio->uio_offset);
303 on = blkoff(imp, uio->uio_offset);
304 n = min((u_int)(imp->logical_block_size - on),
306 diff = (off_t)ip->i_size - uio->uio_offset;
311 size = blksize(imp, ip, lbn);
313 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) {
314 if (lblktosize(imp, rablock) < ip->i_size)
315 error = cluster_read(vp, (off_t)ip->i_size,
316 lbn, size, uio->uio_resid,
317 (ap->a_ioflag >> 16), &bp);
319 error = bread(vp, lbn, size, &bp);
322 lblktosize(imp, rablock) < ip->i_size) {
323 rasize = blksize(imp, ip, rablock);
324 error = breadn(vp, lbn, size, &rablock,
327 error = bread(vp, lbn, size, &bp);
329 n = min(n, size - bp->b_resid);
335 error = uiomove(bp->b_data + on, (int)n, uio);
337 } while (error == 0 && uio->uio_resid > 0 && n != 0);
341 /* struct dirent + enough space for the maximum supported size */
344 char de_name[_DIRENT_RECLEN(NAME_MAX) - sizeof(struct dirent)];
348 * Structure for reading directories
351 struct iso_dirent saveent;
352 struct iso_dirent assocent;
353 struct iso_dirent current;
365 iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off)
369 dp->d_name[dp->d_namlen] = 0;
371 if (idp->uio->uio_resid < _DIRENT_DIRSIZ(dp)) {
377 if (idp->ncookies <= 0) {
382 *idp->cookies++ = off;
386 if ((error = uiomove((caddr_t) dp,_DIRENT_DIRSIZ(dp),idp->uio)) != 0)
393 iso_shipdir(struct isoreaddir *idp)
400 cl = idp->current.de.d_namlen;
401 cname = idp->current.de.d_name;
402 assoc = (cl > 1) && (*cname == ASSOCCHAR);
408 dp = &idp->saveent.de;
410 if (!(sl = dp->d_namlen)) {
411 dp = &idp->assocent.de;
412 sname = dp->d_name + 1;
413 sl = dp->d_namlen - 1;
417 || bcmp(sname,cname,sl)) {
418 if (idp->assocent.de.d_namlen) {
419 if ((error = iso_uiodir(idp,&idp->assocent.de,idp->assocoff)) != 0)
421 idp->assocent.de.d_namlen = 0;
423 if (idp->saveent.de.d_namlen) {
424 if ((error = iso_uiodir(idp,&idp->saveent.de,idp->saveoff)) != 0)
426 idp->saveent.de.d_namlen = 0;
431 idp->assocoff = idp->curroff;
432 bcopy(&idp->current,&idp->assocent,_DIRENT_DIRSIZ(&idp->current.de));
434 idp->saveoff = idp->curroff;
435 bcopy(&idp->current,&idp->saveent,_DIRENT_DIRSIZ(&idp->current.de));
441 * Vnode op for readdir
443 * cd9660_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred,
444 * int *a_eofflag, int *a_ncookies, u_long *a_cookies)
447 cd9660_readdir(struct vop_readdir_args *ap)
449 struct uio *uio = ap->a_uio;
450 struct isoreaddir *idp;
451 struct vnode *vdp = ap->a_vp;
454 struct buf *bp = NULL;
455 struct iso_directory_record *ep;
456 int entryoffsetinblock;
463 u_long *cookies = NULL;
467 bmask = imp->im_bmask;
469 MALLOC(idp, struct isoreaddir *, sizeof(*idp), M_TEMP, M_WAITOK);
470 idp->saveent.de.d_namlen = idp->assocent.de.d_namlen = 0;
473 * Is it worth trying to figure out the type?
475 idp->saveent.de.d_type = DT_UNKNOWN;
476 idp->assocent.de.d_type = DT_UNKNOWN;
477 idp->current.de.d_type = DT_UNKNOWN;
479 if (ap->a_ncookies == NULL) {
483 * Guess the number of cookies needed.
485 ncookies = uio->uio_resid / 16;
486 MALLOC(cookies, u_long *, ncookies * sizeof(u_int), M_TEMP,
488 idp->cookies = cookies;
489 idp->ncookies = ncookies;
492 idp->curroff = uio->uio_offset;
494 if ((entryoffsetinblock = idp->curroff & bmask) &&
495 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) {
499 endsearch = dp->i_size;
501 while (idp->curroff < endsearch) {
503 * If offset is on a block boundary,
504 * read the next directory block.
505 * Release previous if it exists.
507 if ((idp->curroff & bmask) == 0) {
511 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0)
513 entryoffsetinblock = 0;
516 * Get pointer to next entry.
518 ep = (struct iso_directory_record *)
519 ((char *)bp->b_data + entryoffsetinblock);
521 reclen = isonum_711(ep->length);
523 /* skip to next block, if any */
525 (idp->curroff & ~bmask) + imp->logical_block_size;
529 if (reclen < ISO_DIRECTORY_RECORD_SIZE) {
531 /* illegal entry, stop */
535 if (entryoffsetinblock + reclen > imp->logical_block_size) {
537 /* illegal directory, so stop looking */
541 idp->current.de.d_namlen = isonum_711(ep->name_len);
543 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.de.d_namlen) {
545 /* illegal entry, stop */
549 if (isonum_711(ep->flags)&2)
550 idp->current.de.d_ino = isodirino(ep, imp);
552 idp->current.de.d_ino = dbtob(bp->b_blkno) +
555 idp->curroff += reclen;
557 switch (imp->iso_ftype) {
560 ino_t cur_fileno = idp->current.de.d_ino;
561 cd9660_rrip_getname(ep,idp->current.de.d_name, &namelen,
563 idp->current.de.d_ino = cur_fileno;
564 idp->current.de.d_namlen = namelen;
565 if (idp->current.de.d_namlen)
566 error = iso_uiodir(idp,&idp->current.de,idp->curroff);
569 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/
570 strcpy(idp->current.de.d_name,"..");
571 if (idp->current.de.d_namlen == 1 && ep->name[0] == 0) {
572 idp->current.de.d_namlen = 1;
573 error = iso_uiodir(idp,&idp->current.de,idp->curroff);
574 } else if (idp->current.de.d_namlen == 1 && ep->name[0] == 1) {
575 idp->current.de.d_namlen = 2;
576 error = iso_uiodir(idp,&idp->current.de,idp->curroff);
578 isofntrans(ep->name,idp->current.de.d_namlen,
579 idp->current.de.d_name, &namelen,
580 imp->iso_ftype == ISO_FTYPE_9660,
581 isonum_711(ep->flags)&4,
583 idp->current.de.d_namlen = namelen;
584 if (imp->iso_ftype == ISO_FTYPE_DEFAULT)
585 error = iso_shipdir(idp);
587 error = iso_uiodir(idp,&idp->current.de,idp->curroff);
593 entryoffsetinblock += reclen;
596 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) {
597 idp->current.de.d_namlen = 0;
598 error = iso_shipdir(idp);
603 if (ap->a_ncookies != NULL) {
605 free(cookies, M_TEMP);
608 * Work out the number of cookies actually used.
610 *ap->a_ncookies = ncookies - idp->ncookies;
611 *ap->a_cookies = cookies;
618 uio->uio_offset = idp->uio_off;
619 *ap->a_eofflag = idp->eofflag;
627 * Return target name of a symbolic link
628 * Shouldn't we get the parent vnode and read the data from there?
629 * This could eventually result in deadlocks in cd9660_lookup.
630 * But otherwise the block read here is in the block buffer two times.
632 typedef struct iso_directory_record ISODIR;
633 typedef struct iso_node ISONODE;
634 typedef struct iso_mnt ISOMNT;
636 * cd9660_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
639 cd9660_readlink(struct vop_readlink_args *ap)
654 if (imp->iso_ftype != ISO_FTYPE_RRIP)
658 * Get parents directory record block that this inode included.
660 error = bread(imp->im_devvp,
661 (ip->i_number >> imp->im_bshift) <<
662 (imp->im_bshift - DEV_BSHIFT),
663 imp->logical_block_size, &bp);
670 * Setup the directory pointer for this inode
672 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask));
675 * Just make sure, we have a right one....
676 * 1: Check not cross boundary on block
678 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length)
679 > (unsigned)imp->logical_block_size) {
686 * Abuse a namei buffer for now.
688 if (uio->uio_segflg == UIO_SYSSPACE)
689 symname = uio->uio_iov->iov_base;
691 symname = zalloc(namei_zone);
694 * Ok, we just gathering a symbolic name in SL record.
696 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) {
697 if (uio->uio_segflg != UIO_SYSSPACE)
698 zfree(namei_zone, symname);
703 * Don't forget before you leave from home ;-)
708 * return with the symbolic name to caller's.
710 if (uio->uio_segflg != UIO_SYSSPACE) {
711 error = uiomove(symname, symlen, uio);
712 zfree(namei_zone, symname);
715 uio->uio_resid -= symlen;
716 uio->uio_iov->iov_base += symlen;
717 uio->uio_iov->iov_len -= symlen;
722 * Calculate the logical to physical mapping if not done already,
723 * then call the device strategy routine.
725 * cd9660_strategy(struct buf *a_vp, struct buf *a_bp)
728 cd9660_strategy(struct vop_strategy_args *ap)
730 struct buf *bp = ap->a_bp;
731 struct vnode *vp = bp->b_vp;
736 if (vp->v_type == VBLK || vp->v_type == VCHR)
737 panic("cd9660_strategy: spec");
738 if (bp->b_blkno == bp->b_lblkno) {
740 VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL, NULL))) {
742 bp->b_flags |= B_ERROR;
746 if ((long)bp->b_blkno == -1)
749 if ((long)bp->b_blkno == -1) {
754 bp->b_dev = vp->v_rdev;
755 VOP_STRATEGY(vp, bp);
760 * Print out the contents of an inode.
762 * cd9660_print(struct vnode *a_vp)
765 cd9660_print(struct vop_print_args *ap)
767 printf("tag VT_ISOFS, isofs vnode\n");
772 * Return POSIX pathconf information applicable to cd9660 filesystems.
774 * cd9660_pathconf(struct vnode *a_vp, int a_name, register_t *a_retval)
777 cd9660_pathconf(struct vop_pathconf_args *ap)
779 switch (ap->a_name) {
784 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP)
785 *ap->a_retval = NAME_MAX;
790 *ap->a_retval = PATH_MAX;
793 *ap->a_retval = PIPE_BUF;
795 case _PC_CHOWN_RESTRICTED:
810 * XXX By default, wimp out... note that a_offset is ignored (and always
814 cd9660_getpages(struct vop_getpages_args *ap)
816 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
823 * XXX By default, wimp out... note that a_offset is ignored (and always
827 cd9660_putpages(struct vop_putpages_args *ap)
829 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
830 ap->a_sync, ap->a_rtvals);
834 * Advisory lock support
837 cd9660_advlock(struct vop_advlock_args *ap)
839 struct iso_node *ip = VTOI(ap->a_vp);
840 return (lf_advlock(ap, &(ip->i_lockf), ip->i_size));
845 * Global vfs data structures for cd9660
847 struct vnodeopv_entry_desc cd9660_vnodeop_entries[] = {
848 { &vop_default_desc, (vnodeopv_entry_t) vop_defaultop },
849 { &vop_access_desc, (vnodeopv_entry_t) cd9660_access },
850 { &vop_advlock_desc, (vnodeopv_entry_t) cd9660_advlock },
851 { &vop_bmap_desc, (vnodeopv_entry_t) cd9660_bmap },
852 { &vop_old_lookup_desc, (vnodeopv_entry_t) cd9660_lookup },
853 { &vop_getattr_desc, (vnodeopv_entry_t) cd9660_getattr },
854 { &vop_inactive_desc, (vnodeopv_entry_t) cd9660_inactive },
855 { &vop_ioctl_desc, (vnodeopv_entry_t) cd9660_ioctl },
856 { &vop_islocked_desc, (vnodeopv_entry_t) vop_stdislocked },
857 { &vop_lock_desc, (vnodeopv_entry_t) vop_stdlock },
858 { &vop_pathconf_desc, (vnodeopv_entry_t) cd9660_pathconf },
859 { &vop_print_desc, (vnodeopv_entry_t) cd9660_print },
860 { &vop_read_desc, (vnodeopv_entry_t) cd9660_read },
861 { &vop_readdir_desc, (vnodeopv_entry_t) cd9660_readdir },
862 { &vop_readlink_desc, (vnodeopv_entry_t) cd9660_readlink },
863 { &vop_reclaim_desc, (vnodeopv_entry_t) cd9660_reclaim },
864 { &vop_setattr_desc, (vnodeopv_entry_t) cd9660_setattr },
865 { &vop_strategy_desc, (vnodeopv_entry_t) cd9660_strategy },
866 { &vop_unlock_desc, (vnodeopv_entry_t) vop_stdunlock },
867 { &vop_getpages_desc, (vnodeopv_entry_t) cd9660_getpages },
868 { &vop_putpages_desc, (vnodeopv_entry_t) cd9660_putpages },
873 * Special device vnode ops
875 struct vnodeopv_entry_desc cd9660_specop_entries[] = {
876 { &vop_default_desc, (vnodeopv_entry_t) spec_vnoperate },
877 { &vop_access_desc, (vnodeopv_entry_t) cd9660_access },
878 { &vop_getattr_desc, (vnodeopv_entry_t) cd9660_getattr },
879 { &vop_inactive_desc, (vnodeopv_entry_t) cd9660_inactive },
880 { &vop_islocked_desc, (vnodeopv_entry_t) vop_stdislocked },
881 { &vop_lock_desc, (vnodeopv_entry_t) vop_stdlock },
882 { &vop_print_desc, (vnodeopv_entry_t) cd9660_print },
883 { &vop_reclaim_desc, (vnodeopv_entry_t) cd9660_reclaim },
884 { &vop_setattr_desc, (vnodeopv_entry_t) cd9660_setattr },
885 { &vop_unlock_desc, (vnodeopv_entry_t) vop_stdunlock },
889 struct vnodeopv_entry_desc cd9660_fifoop_entries[] = {
890 { &vop_default_desc, (vnodeopv_entry_t) fifo_vnoperate },
891 { &vop_access_desc, (vnodeopv_entry_t) cd9660_access },
892 { &vop_getattr_desc, (vnodeopv_entry_t) cd9660_getattr },
893 { &vop_inactive_desc, (vnodeopv_entry_t) cd9660_inactive },
894 { &vop_islocked_desc, (vnodeopv_entry_t) vop_stdislocked },
895 { &vop_lock_desc, (vnodeopv_entry_t) vop_stdlock },
896 { &vop_print_desc, (vnodeopv_entry_t) cd9660_print },
897 { &vop_reclaim_desc, (vnodeopv_entry_t) cd9660_reclaim },
898 { &vop_setattr_desc, (vnodeopv_entry_t) cd9660_setattr },
899 { &vop_unlock_desc, (vnodeopv_entry_t) vop_stdunlock },