File:  [DragonFly] / src / sys / vfs / isofs / cd9660 / cd9660_vfsops.c
Revision 1.14: download - view: text, annotated - select for diffs
Sat Apr 24 04:32:04 2004 UTC (9 years, 11 months ago) by drhodus
Branches: MAIN
CVS tags: HEAD
Remove the VREF() macro and uses of it.
Remove uses of 0x20 before ^I inside vnode.h

    1: /*-
    2:  * Copyright (c) 1994
    3:  *	The Regents of the University of California.  All rights reserved.
    4:  *
    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).
    9:  *
   10:  * Redistribution and use in source and binary forms, with or without
   11:  * modification, are permitted provided that the following conditions
   12:  * are met:
   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. 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.
   25:  *
   26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   36:  * SUCH DAMAGE.
   37:  *
   38:  *	@(#)cd9660_vfsops.c	8.18 (Berkeley) 5/22/95
   39:  * $FreeBSD: src/sys/isofs/cd9660/cd9660_vfsops.c,v 1.74.2.7 2002/04/08 09:39:29 bde Exp $
   40:  * $DragonFly: src/sys/vfs/isofs/cd9660/cd9660_vfsops.c,v 1.14 2004/04/24 04:32:04 drhodus Exp $
   41:  */
   42: 
   43: #include <sys/param.h>
   44: #include <sys/systm.h>
   45: #include <sys/proc.h>
   46: #include <sys/namei.h>
   47: #include <sys/kernel.h>
   48: #include <sys/vnode.h>
   49: #include <sys/mount.h>
   50: #include <sys/buf.h>
   51: #include <sys/cdio.h>
   52: #include <sys/conf.h>
   53: #include <sys/fcntl.h>
   54: #include <sys/malloc.h>
   55: #include <sys/stat.h>
   56: #include <sys/syslog.h>
   57: 
   58: #include <vm/vm_zone.h>
   59: 
   60: #include "iso.h"
   61: #include "iso_rrip.h"
   62: #include "cd9660_node.h"
   63: #include "cd9660_mount.h"
   64: 
   65: MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure");
   66: MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part");
   67: 
   68: static int cd9660_mount (struct mount *,
   69: 	    char *, caddr_t, struct nameidata *, struct thread *);
   70: static int cd9660_unmount (struct mount *, int, struct thread *);
   71: static int cd9660_root (struct mount *, struct vnode **);
   72: static int cd9660_statfs (struct mount *, struct statfs *, struct thread *);
   73: static int cd9660_vget (struct mount *, ino_t, struct vnode **);
   74: static int cd9660_fhtovp (struct mount *, struct fid *, struct vnode **);
   75: static int cd9660_checkexp (struct mount *, struct sockaddr *,
   76: 	    int *, struct ucred **);
   77: static int cd9660_vptofh (struct vnode *, struct fid *);
   78: 
   79: static struct vfsops cd9660_vfsops = {
   80: 	cd9660_mount,
   81: 	vfs_stdstart,
   82: 	cd9660_unmount,
   83: 	cd9660_root,
   84: 	vfs_stdquotactl,
   85: 	cd9660_statfs,
   86: 	vfs_stdsync,
   87: 	cd9660_vget,
   88: 	cd9660_fhtovp,
   89: 	cd9660_checkexp,
   90: 	cd9660_vptofh,
   91: 	cd9660_init,
   92: 	cd9660_uninit,
   93: 	vfs_stdextattrctl,
   94: };
   95: VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY);
   96: MODULE_VERSION(cd9660, 1);
   97: 
   98: 
   99: /*
  100:  * Called by vfs_mountroot when iso is going to be mounted as root.
  101:  */
  102: 
  103: static int iso_get_ssector (dev_t dev, struct thread *td);
  104: static int iso_mountfs (struct vnode *devvp, struct mount *mp,
  105: 			    struct thread *td, struct iso_args *argp);
  106: 
  107: /*
  108:  * Try to find the start of the last data track on this CD-ROM.  This
  109:  * is used to mount the last session of a multi-session CD.  Bail out
  110:  * and return 0 if we fail, this is always a safe bet.
  111:  */
  112: static int
  113: iso_get_ssector(dev_t dev, struct thread *td)
  114: {
  115: 	struct ioc_toc_header h;
  116: 	struct ioc_read_toc_single_entry t;
  117: 	int i;
  118: 
  119: 	if (dev_dioctl(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, td) != 0)
  120: 		return 0;
  121: 
  122: 	for (i = h.ending_track; i >= 0; i--) {
  123: 		t.address_format = CD_LBA_FORMAT;
  124: 		t.track = i;
  125: 		if (dev_dioctl(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, td) != 0) {
  126: 			return 0;
  127: 		}
  128: 		if ((t.entry.control & 4) != 0)
  129: 			/* found a data track */
  130: 			break;
  131: 	}
  132: 
  133: 	if (i < 0)
  134: 		return 0;
  135: 
  136: 	return ntohl(t.entry.addr.lba);
  137: }
  138: 
  139: static int iso_mountroot (struct mount *mp, struct thread *td);
  140: 
  141: static int
  142: iso_mountroot(struct mount *mp, struct thread *td)
  143: {
  144: 	struct iso_args args;
  145: 	int error;
  146: 
  147: 	if ((error = bdevvp(rootdev, &rootvp))) {
  148: 		printf("iso_mountroot: can't find rootvp\n");
  149: 		return (error);
  150: 	}
  151: 	args.flags = ISOFSMNT_ROOT;
  152: 
  153: 	vn_lock(rootvp, NULL, LK_EXCLUSIVE | LK_RETRY, td);
  154: 	error = VOP_OPEN(rootvp, FREAD, FSCRED, td);
  155: 	VOP_UNLOCK(rootvp, NULL, 0, td);
  156: 	if (error)
  157: 		return (error);
  158: 
  159: 	args.ssector = iso_get_ssector(rootdev, td);
  160: 
  161: 	(void)VOP_CLOSE(rootvp, FREAD, td);
  162: 
  163: 	if (bootverbose)
  164: 		printf("iso_mountroot(): using session at block %d\n",
  165: 		       args.ssector);
  166: 	if ((error = iso_mountfs(rootvp, mp, td, &args)) != 0)
  167: 		return (error);
  168: 
  169: 	(void)cd9660_statfs(mp, &mp->mnt_stat, td);
  170: 	return (0);
  171: }
  172: 
  173: /*
  174:  * VFS Operations.
  175:  *
  176:  * mount system call
  177:  */
  178: static int
  179: cd9660_mount(struct mount *mp, char *path, caddr_t data, struct nameidata *ndp,
  180: 	     struct thread *td)
  181: {
  182: 	struct vnode *devvp;
  183: 	struct iso_args args;
  184: 	size_t size;
  185: 	int error;
  186: 	mode_t accessmode;
  187: 	struct iso_mnt *imp = 0;
  188: 
  189: 	if ((mp->mnt_flag & MNT_ROOTFS) != 0) {
  190: 		return (iso_mountroot(mp, td));
  191: 	}
  192: 	if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args))))
  193: 		return (error);
  194: 
  195: 	if ((mp->mnt_flag & MNT_RDONLY) == 0)
  196: 		return (EROFS);
  197: 
  198: 	KKASSERT(td->td_proc);
  199: 
  200: 	/*
  201: 	 * If updating, check whether changing from read-only to
  202: 	 * read/write; if there is no device name, that's all we do.
  203: 	 */
  204: 	if (mp->mnt_flag & MNT_UPDATE) {
  205: 		imp = VFSTOISOFS(mp);
  206: 		if (args.fspec == 0)
  207: 			return (vfs_export(mp, &imp->im_export, &args.export));
  208: 	}
  209: 	/*
  210: 	 * Not an update, or updating the name: look up the name
  211: 	 * and verify that it refers to a sensible block device.
  212: 	 */
  213: 	NDINIT(ndp, NAMEI_LOOKUP, CNP_FOLLOW, UIO_USERSPACE, args.fspec, td);
  214: 	if ((error = namei(ndp)))
  215: 		return (error);
  216: 	NDFREE(ndp, NDF_ONLY_PNBUF);
  217: 	devvp = ndp->ni_vp;
  218: 
  219: 	if (!vn_isdisk(devvp, &error)) {
  220: 		vrele(devvp);
  221: 		return (error);
  222: 	}
  223: 
  224: 	/*       
  225: 	 * Verify that user has necessary permissions on the device,
  226: 	 * or has superuser abilities
  227: 	 */
  228: 	accessmode = VREAD;
  229: 	vn_lock(devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td);
  230: 	error = VOP_ACCESS(devvp, accessmode, td->td_proc->p_ucred, td);
  231: 	if (error) 
  232: 		error = suser(td);
  233: 	if (error) {
  234: 		vput(devvp);
  235: 		return (error);
  236: 	}
  237: 	VOP_UNLOCK(devvp, NULL, 0, td);
  238: 
  239: 	if ((mp->mnt_flag & MNT_UPDATE) == 0) {
  240: 		error = iso_mountfs(devvp, mp, td, &args);
  241: 	} else {
  242: 		if (devvp != imp->im_devvp)
  243: 			error = EINVAL;	/* needs translation */
  244: 		else
  245: 			vrele(devvp);
  246: 	}
  247: 	if (error) {
  248: 		vrele(devvp);
  249: 		return error;
  250: 	}
  251: 	imp = VFSTOISOFS(mp);
  252: 	(void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
  253: 	bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
  254: 	(void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
  255: 	    &size);
  256: 	bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
  257: 	(void) cd9660_statfs(mp, &mp->mnt_stat, td);
  258: 	return 0;
  259: }
  260: 
  261: /*
  262:  * Common code for mount and mountroot
  263:  */
  264: static int
  265: iso_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td,
  266: 	    struct iso_args *argp)
  267: {
  268: 	struct iso_mnt *isomp = (struct iso_mnt *)0;
  269: 	struct buf *bp = NULL;
  270: 	struct buf *pribp = NULL, *supbp = NULL;
  271: 	dev_t dev = devvp->v_rdev;
  272: 	int error = EINVAL;
  273: 	int needclose = 0;
  274: 	int high_sierra = 0;
  275: 	int iso_bsize;
  276: 	int iso_blknum;
  277: 	int joliet_level;
  278: 	struct iso_volume_descriptor *vdp = 0;
  279: 	struct iso_primary_descriptor *pri = NULL;
  280: 	struct iso_sierra_primary_descriptor *pri_sierra = NULL;
  281: 	struct iso_supplementary_descriptor *sup = NULL;
  282: 	struct iso_directory_record *rootp;
  283: 	int logical_block_size;
  284: 
  285: 	if (!(mp->mnt_flag & MNT_RDONLY))
  286: 		return EROFS;
  287: 
  288: 	/*
  289: 	 * Disallow multiple mounts of the same device.
  290: 	 * Disallow mounting of a device that is currently in use
  291: 	 * (except for root, which might share swap device for miniroot).
  292: 	 * Flush out any old buffers remaining from a previous use.
  293: 	 */
  294: 	if ((error = vfs_mountedon(devvp)))
  295: 		return error;
  296: 	if (vcount(devvp) > 1 && devvp != rootvp)
  297: 		return EBUSY;
  298: 	if ((error = vinvalbuf(devvp, V_SAVE, td, 0, 0)))
  299: 		return (error);
  300: 
  301: 	vn_lock(devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td);
  302: 	error = VOP_OPEN(devvp, FREAD, FSCRED, td);
  303: 	VOP_UNLOCK(devvp, NULL, 0, td);
  304: 	if (error)
  305: 		return error;
  306: 	if (devvp->v_rdev->si_iosize_max != 0)
  307: 		mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
  308: 	if (mp->mnt_iosize_max > MAXPHYS)
  309: 		mp->mnt_iosize_max = MAXPHYS;
  310: 
  311: 	needclose = 1;
  312: 
  313: 	/* This is the "logical sector size".  The standard says this
  314: 	 * should be 2048 or the physical sector size on the device,
  315: 	 * whichever is greater.  For now, we'll just use a constant.
  316: 	 */
  317: 	iso_bsize = ISO_DEFAULT_BLOCK_SIZE;
  318: 
  319: 	joliet_level = 0;
  320: 	for (iso_blknum = 16 + argp->ssector;
  321: 	     iso_blknum < 100 + argp->ssector;
  322: 	     iso_blknum++) {
  323: 		if ((error = bread(devvp, iso_blknum * btodb(iso_bsize),
  324: 				  iso_bsize, &bp)) != 0)
  325: 			goto out;
  326: 		
  327: 		vdp = (struct iso_volume_descriptor *)bp->b_data;
  328: 		if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) {
  329: 			if (bcmp (vdp->id_sierra, ISO_SIERRA_ID,
  330: 				  sizeof vdp->id) != 0) {
  331: 				error = EINVAL;
  332: 				goto out;
  333: 			} else
  334: 				high_sierra = 1;
  335: 		}
  336: 		switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){
  337: 		case ISO_VD_PRIMARY:
  338: 			if (pribp == NULL) {
  339: 				pribp = bp;
  340: 				bp = NULL;
  341: 				pri = (struct iso_primary_descriptor *)vdp;
  342: 				pri_sierra =
  343: 				  (struct iso_sierra_primary_descriptor *)vdp;
  344: 			}
  345: 			break;
  346: 
  347: 		case ISO_VD_SUPPLEMENTARY:
  348: 			if (supbp == NULL) {
  349: 				supbp = bp;
  350: 				bp = NULL;
  351: 				sup = (struct iso_supplementary_descriptor *)vdp;
  352: 
  353: 				if (!(argp->flags & ISOFSMNT_NOJOLIET)) {
  354: 					if (bcmp(sup->escape, "%/@", 3) == 0)
  355: 						joliet_level = 1;
  356: 					if (bcmp(sup->escape, "%/C", 3) == 0)
  357: 						joliet_level = 2;
  358: 					if (bcmp(sup->escape, "%/E", 3) == 0)
  359: 						joliet_level = 3;
  360: 
  361: 					if ((isonum_711 (sup->flags) & 1) &&
  362: 					    (argp->flags & ISOFSMNT_BROKENJOLIET) == 0)
  363: 						joliet_level = 0;
  364: 				}
  365: 			}
  366: 			break;
  367: 
  368: 		case ISO_VD_END:
  369: 			goto vd_end;
  370: 
  371: 		default:
  372: 			break;
  373: 		}
  374: 		if (bp) {
  375: 			brelse(bp);
  376: 			bp = NULL;
  377: 		}
  378: 	}
  379:  vd_end:
  380: 	if (bp) {
  381: 		brelse(bp);
  382: 		bp = NULL;
  383: 	}
  384: 
  385: 	if (pri == NULL) {
  386: 		error = EINVAL;
  387: 		goto out;
  388: 	}
  389: 
  390: 	logical_block_size =
  391: 		isonum_723 (high_sierra?
  392: 			    pri_sierra->logical_block_size:
  393: 			    pri->logical_block_size);
  394: 
  395: 	if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
  396: 	    || (logical_block_size & (logical_block_size - 1)) != 0) {
  397: 		error = EINVAL;
  398: 		goto out;
  399: 	}
  400: 
  401: 	rootp = (struct iso_directory_record *)
  402: 		(high_sierra?
  403: 		 pri_sierra->root_directory_record:
  404: 		 pri->root_directory_record);
  405: 
  406: 	isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK);
  407: 	bzero((caddr_t)isomp, sizeof *isomp);
  408: 	isomp->logical_block_size = logical_block_size;
  409: 	isomp->volume_space_size =
  410: 		isonum_733 (high_sierra?
  411: 			    pri_sierra->volume_space_size:
  412: 			    pri->volume_space_size);
  413: 	isomp->joliet_level = 0;
  414: 	/*
  415: 	 * Since an ISO9660 multi-session CD can also access previous
  416: 	 * sessions, we have to include them into the space consider-
  417: 	 * ations.  This doesn't yield a very accurate number since
  418: 	 * parts of the old sessions might be inaccessible now, but we
  419: 	 * can't do much better.  This is also important for the NFS
  420: 	 * filehandle validation.
  421: 	 */
  422: 	isomp->volume_space_size += argp->ssector;
  423: 	bcopy (rootp, isomp->root, sizeof isomp->root);
  424: 	isomp->root_extent = isonum_733 (rootp->extent);
  425: 	isomp->root_size = isonum_733 (rootp->size);
  426: 
  427: 	isomp->im_bmask = logical_block_size - 1;
  428: 	isomp->im_bshift = ffs(logical_block_size) - 1;
  429: 
  430: 	pribp->b_flags |= B_AGE;
  431: 	brelse(pribp);
  432: 	pribp = NULL;
  433: 
  434: 	mp->mnt_data = (qaddr_t)isomp;
  435: 	mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
  436: 	mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
  437: 	mp->mnt_maxsymlinklen = 0;
  438: 	mp->mnt_flag |= MNT_LOCAL;
  439: 	isomp->im_mountp = mp;
  440: 	isomp->im_dev = dev;
  441: 	isomp->im_devvp = devvp;
  442: 
  443: 	devvp->v_specmountpoint = mp;
  444: 
  445: 	/* Check the Rock Ridge Extention support */
  446: 	if (!(argp->flags & ISOFSMNT_NORRIP)) {
  447: 		if ((error = bread(isomp->im_devvp,
  448: 				  (isomp->root_extent + isonum_711(rootp->ext_attr_length)) <<
  449: 				  (isomp->im_bshift - DEV_BSHIFT),
  450: 				  isomp->logical_block_size, &bp)) != 0)
  451: 		    goto out;
  452: 		
  453: 		rootp = (struct iso_directory_record *)bp->b_data;
  454: 		
  455: 		if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
  456: 		    argp->flags	 |= ISOFSMNT_NORRIP;
  457: 		} else {
  458: 		    argp->flags	 &= ~ISOFSMNT_GENS;
  459: 		}
  460: 
  461: 		/*
  462: 		 * The contents are valid,
  463: 		 * but they will get reread as part of another vnode, so...
  464: 		 */
  465: 		bp->b_flags |= B_AGE;
  466: 		brelse(bp);
  467: 		bp = NULL;
  468: 	}
  469: 	isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS |
  470: 					 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET);
  471: 
  472: 	if (high_sierra) {
  473: 		/* this effectively ignores all the mount flags */
  474: 		log(LOG_INFO, "cd9660: High Sierra Format\n");
  475: 		isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA;
  476: 	} else
  477: 		switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) {
  478: 		  default:
  479: 			  isomp->iso_ftype = ISO_FTYPE_DEFAULT;
  480: 			  break;
  481: 		  case ISOFSMNT_GENS|ISOFSMNT_NORRIP:
  482: 			  isomp->iso_ftype = ISO_FTYPE_9660;
  483: 			  break;
  484: 		  case 0:
  485: 			  log(LOG_INFO, "cd9660: RockRidge Extension\n");
  486: 			  isomp->iso_ftype = ISO_FTYPE_RRIP;
  487: 			  break;
  488: 		}
  489: 
  490: 	/* Decide whether to use the Joliet descriptor */
  491: 
  492: 	if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) {
  493: 		log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level);
  494: 		rootp = (struct iso_directory_record *)
  495: 			sup->root_directory_record;
  496: 		bcopy (rootp, isomp->root, sizeof isomp->root);
  497: 		isomp->root_extent = isonum_733 (rootp->extent);
  498: 		isomp->root_size = isonum_733 (rootp->size);
  499: 		isomp->joliet_level = joliet_level;
  500: 		supbp->b_flags |= B_AGE;
  501: 	}
  502: 
  503: 	if (supbp) {
  504: 		brelse(supbp);
  505: 		supbp = NULL;
  506: 	}
  507: 
  508: 	return 0;
  509: out:
  510: 	devvp->v_specmountpoint = NULL;
  511: 	if (bp)
  512: 		brelse(bp);
  513: 	if (pribp)
  514: 		brelse(pribp);
  515: 	if (supbp)
  516: 		brelse(supbp);
  517: 	if (needclose)
  518: 		(void)VOP_CLOSE(devvp, FREAD, td);
  519: 	if (isomp) {
  520: 		free((caddr_t)isomp, M_ISOFSMNT);
  521: 		mp->mnt_data = (qaddr_t)0;
  522: 	}
  523: 	return error;
  524: }
  525: 
  526: /*
  527:  * unmount system call
  528:  */
  529: static int
  530: cd9660_unmount(struct mount *mp, int mntflags, struct thread *td)
  531: {
  532: 	struct iso_mnt *isomp;
  533: 	int error, flags = 0;
  534: 
  535: 	if (mntflags & MNT_FORCE)
  536: 		flags |= FORCECLOSE;
  537: #if 0
  538: 	mntflushbuf(mp, 0);
  539: 	if (mntinvalbuf(mp))
  540: 		return EBUSY;
  541: #endif
  542: 	if ((error = vflush(mp, 0, flags)))
  543: 		return (error);
  544: 
  545: 	isomp = VFSTOISOFS(mp);
  546: 
  547: 	isomp->im_devvp->v_specmountpoint = NULL;
  548: 	error = VOP_CLOSE(isomp->im_devvp, FREAD, td);
  549: 	vrele(isomp->im_devvp);
  550: 	free((caddr_t)isomp, M_ISOFSMNT);
  551: 	mp->mnt_data = (qaddr_t)0;
  552: 	mp->mnt_flag &= ~MNT_LOCAL;
  553: 	return (error);
  554: }
  555: 
  556: /*
  557:  * Return root of a filesystem
  558:  */
  559: static int
  560: cd9660_root(struct mount *mp, struct vnode **vpp)
  561: {
  562: 	struct iso_mnt *imp = VFSTOISOFS(mp);
  563: 	struct iso_directory_record *dp =
  564: 	    (struct iso_directory_record *)imp->root;
  565: 	ino_t ino = isodirino(dp, imp);
  566: 	
  567: 	/*
  568: 	 * With RRIP we must use the `.' entry of the root directory.
  569: 	 * Simply tell vget, that it's a relocated directory.
  570: 	 */
  571: 	return (cd9660_vget_internal(mp, ino, vpp,
  572: 	    imp->iso_ftype == ISO_FTYPE_RRIP, dp));
  573: }
  574: 
  575: /*
  576:  * Get file system statistics.
  577:  */
  578: int
  579: cd9660_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
  580: {
  581: 	struct iso_mnt *isomp;
  582: 
  583: 	isomp = VFSTOISOFS(mp);
  584: 
  585: 	sbp->f_bsize = isomp->logical_block_size;
  586: 	sbp->f_iosize = sbp->f_bsize;	/* XXX */
  587: 	sbp->f_blocks = isomp->volume_space_size;
  588: 	sbp->f_bfree = 0; /* total free blocks */
  589: 	sbp->f_bavail = 0; /* blocks free for non superuser */
  590: 	sbp->f_files =	0; /* total files */
  591: 	sbp->f_ffree = 0; /* free file nodes */
  592: 	if (sbp != &mp->mnt_stat) {
  593: 		sbp->f_type = mp->mnt_vfc->vfc_typenum;
  594: 		bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
  595: 		bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
  596: 	}
  597: 	return 0;
  598: }
  599: 
  600: /*
  601:  * File handle to vnode
  602:  *
  603:  * Have to be really careful about stale file handles:
  604:  * - check that the inode number is in range
  605:  * - call iget() to get the locked inode
  606:  * - check for an unallocated inode (i_mode == 0)
  607:  * - check that the generation number matches
  608:  */
  609: 
  610: struct ifid {
  611: 	ushort	ifid_len;
  612: 	ushort	ifid_pad;
  613: 	int	ifid_ino;
  614: 	long	ifid_start;
  615: };
  616: 
  617: /* ARGSUSED */
  618: int
  619: cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
  620: {
  621: 	struct ifid *ifhp = (struct ifid *)fhp;
  622: 	struct iso_node *ip;
  623: 	struct vnode *nvp;
  624: 	int error;
  625: 	
  626: #ifdef	ISOFS_DBG
  627: 	printf("fhtovp: ino %d, start %ld\n",
  628: 	       ifhp->ifid_ino, ifhp->ifid_start);
  629: #endif
  630: 	
  631: 	if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) {
  632: 		*vpp = NULLVP;
  633: 		return (error);
  634: 	}
  635: 	ip = VTOI(nvp);
  636: 	if (ip->inode.iso_mode == 0) {
  637: 		vput(nvp);
  638: 		*vpp = NULLVP;
  639: 		return (ESTALE);
  640: 	}
  641: 	*vpp = nvp;
  642: 	return (0);
  643: }
  644: 
  645: int
  646: cd9660_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp,
  647: 		struct ucred **credanonp)
  648: {
  649: 	struct netcred *np;
  650: 	struct iso_mnt *imp;
  651: 
  652: 	imp = VFSTOISOFS(mp);	
  653: 
  654: 	/*
  655: 	 * Get the export permission structure for this <mp, client> tuple.
  656: 	 */
  657: 	np = vfs_export_lookup(mp, &imp->im_export, nam);
  658: 	if (np == NULL)
  659: 		return (EACCES);
  660: 
  661: 	*exflagsp = np->netc_exflags;
  662: 	*credanonp = &np->netc_anon;
  663: 	return (0);
  664: }
  665: 
  666: int
  667: cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
  668: {
  669: 
  670: 	/*
  671: 	 * XXXX
  672: 	 * It would be nice if we didn't always set the `relocated' flag
  673: 	 * and force the extra read, but I don't want to think about fixing
  674: 	 * that right now.
  675: 	 */
  676: 	return (cd9660_vget_internal(mp, ino, vpp,
  677: #if 0
  678: 	    VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
  679: #else
  680: 	    0,
  681: #endif
  682: 	    (struct iso_directory_record *)0));
  683: }
  684: 
  685: int
  686: cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp,
  687: 		     int relocated, struct iso_directory_record *isodir)
  688: {
  689: 	struct iso_mnt *imp;
  690: 	struct iso_node *ip;
  691: 	struct buf *bp;
  692: 	struct vnode *vp;
  693: 	dev_t dev;
  694: 	int error;
  695: 
  696: 	imp = VFSTOISOFS(mp);
  697: 	dev = imp->im_dev;
  698: 	if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP)
  699: 		return (0);
  700: 
  701: 	/* Allocate a new vnode/iso_node. */
  702: 	if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) {
  703: 		*vpp = NULLVP;
  704: 		return (error);
  705: 	}
  706: 	MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE,
  707: 	    M_WAITOK);
  708: 	bzero((caddr_t)ip, sizeof(struct iso_node));
  709: 	lockinit(&ip->i_lock, 0, "isonode", 0, 0);
  710: 	vp->v_data = ip;
  711: 	ip->i_vnode = vp;
  712: 	ip->i_dev = dev;
  713: 	ip->i_number = ino;
  714: 
  715: 	/*
  716: 	 * Put it onto its hash chain and lock it so that other requests for
  717: 	 * this inode will block if they arrive while we are sleeping waiting
  718: 	 * for old data structures to be purged or for the contents of the
  719: 	 * disk portion of this inode to be read.
  720: 	 */
  721: 	cd9660_ihashins(ip);
  722: 
  723: 	if (isodir == 0) {
  724: 		int lbn, off;
  725: 
  726: 		lbn = lblkno(imp, ino);
  727: 		if (lbn >= imp->volume_space_size) {
  728: 			vput(vp);
  729: 			printf("fhtovp: lbn exceed volume space %d\n", lbn);
  730: 			return (ESTALE);
  731: 		}
  732: 	
  733: 		off = blkoff(imp, ino);
  734: 		if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
  735: 			vput(vp);
  736: 			printf("fhtovp: crosses block boundary %d\n",
  737: 			       off + ISO_DIRECTORY_RECORD_SIZE);
  738: 			return (ESTALE);
  739: 		}
  740: 	
  741: 		error = bread(imp->im_devvp,
  742: 			      lbn << (imp->im_bshift - DEV_BSHIFT),
  743: 			      imp->logical_block_size, &bp);
  744: 		if (error) {
  745: 			vput(vp);
  746: 			brelse(bp);
  747: 			printf("fhtovp: bread error %d\n",error);
  748: 			return (error);
  749: 		}
  750: 		isodir = (struct iso_directory_record *)(bp->b_data + off);
  751: 
  752: 		if (off + isonum_711(isodir->length) >
  753: 		    imp->logical_block_size) {
  754: 			vput(vp);
  755: 			if (bp != 0)
  756: 				brelse(bp);
  757: 			printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
  758: 			       off +isonum_711(isodir->length), off,
  759: 			       isonum_711(isodir->length));
  760: 			return (ESTALE);
  761: 		}
  762: 	
  763: #if 0
  764: 		if (isonum_733(isodir->extent) +
  765: 		    isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) {
  766: 			if (bp != 0)
  767: 				brelse(bp);
  768: 			printf("fhtovp: file start miss %d vs %d\n",
  769: 			       isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length),
  770: 			       ifhp->ifid_start);
  771: 			return (ESTALE);
  772: 		}
  773: #endif
  774: 	} else
  775: 		bp = 0;
  776: 
  777: 	ip->i_mnt = imp;
  778: 	ip->i_devvp = imp->im_devvp;
  779: 	vref(ip->i_devvp);
  780: 
  781: 	if (relocated) {
  782: 		/*
  783: 		 * On relocated directories we must
  784: 		 * read the `.' entry out of a dir.
  785: 		 */
  786: 		ip->iso_start = ino >> imp->im_bshift;
  787: 		if (bp != 0)
  788: 			brelse(bp);
  789: 		if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) {
  790: 			vput(vp);
  791: 			return (error);
  792: 		}
  793: 		isodir = (struct iso_directory_record *)bp->b_data;
  794: 	}
  795: 
  796: 	ip->iso_extent = isonum_733(isodir->extent);
  797: 	ip->i_size = isonum_733(isodir->size);
  798: 	ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
  799: 	
  800: 	/*
  801: 	 * Setup time stamp, attribute
  802: 	 */
  803: 	vp->v_type = VNON;
  804: 	switch (imp->iso_ftype) {
  805: 	default:	/* ISO_FTYPE_9660 */
  806: 	    {
  807: 		struct buf *bp2;
  808: 		int off;
  809: 		if ((imp->im_flags & ISOFSMNT_EXTATT)
  810: 		    && (off = isonum_711(isodir->ext_attr_length)))
  811: 			cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL,
  812: 				     &bp2);
  813: 		else
  814: 			bp2 = NULL;
  815: 		cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660);
  816: 		cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660);
  817: 		if (bp2)
  818: 			brelse(bp2);
  819: 		break;
  820: 	    }
  821: 	case ISO_FTYPE_RRIP:
  822: 		cd9660_rrip_analyze(isodir, ip, imp);
  823: 		break;
  824: 	}
  825: 
  826: 	if (bp != 0)
  827: 		brelse(bp);
  828: 
  829: 	/*
  830: 	 * Initialize the associated vnode
  831: 	 */
  832: 	switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) {
  833: 	case VFIFO:
  834: 		vp->v_op = cd9660_fifoop_p;
  835: 		break;
  836: 	case VCHR:
  837: 	case VBLK:
  838: 		vp->v_op = cd9660_specop_p;
  839: 		addaliasu(vp, ip->inode.iso_rdev);
  840: 		break;
  841: 	default:
  842: 		break;
  843: 	}
  844: 	
  845: 	if (ip->iso_extent == imp->root_extent)
  846: 		vp->v_flag |= VROOT;
  847: 
  848: 	/*
  849: 	 * XXX need generation number?
  850: 	 */
  851: 	
  852: 	*vpp = vp;
  853: 	return (0);
  854: }
  855: 
  856: /*
  857:  * Vnode pointer to File handle
  858:  */
  859: /* ARGSUSED */
  860: int
  861: cd9660_vptofh(struct vnode *vp, struct fid *fhp)
  862: {
  863: 	struct iso_node *ip = VTOI(vp);
  864: 	struct ifid *ifhp;
  865: 
  866: 	ifhp = (struct ifid *)fhp;
  867: 	ifhp->ifid_len = sizeof(struct ifid);
  868: 
  869: 	ifhp->ifid_ino = ip->i_number;
  870: 	ifhp->ifid_start = ip->iso_start;
  871: 
  872: #ifdef	ISOFS_DBG
  873: 	printf("vptofh: ino %d, start %ld\n",
  874: 	       ifhp->ifid_ino,ifhp->ifid_start);
  875: #endif
  876: 	return 0;
  877: }