/*- * Copyright (c) 1994 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension * Support code is derived from software contributed to Berkeley * by Atsushi Murai (amurai@spec.co.jp). * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)cd9660_vfsops.c 8.3 (Berkeley) 1/31/94 * $Id: cd9660_vfsops.c,v 1.7 1994/09/21 03:46:34 wollman Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct vfsops cd9660_vfsops = { cd9660_mount, cd9660_start, cd9660_unmount, cd9660_root, cd9660_quotactl, cd9660_statfs, cd9660_sync, cd9660_vget, cd9660_fhtovp, cd9660_vptofh, cd9660_init, }; VFS_SET(cd9660_vfsops, cd9660, MOUNT_CD9660, 0); /* * Called by vfs_mountroot when iso is going to be mounted as root. * * Name is updated by mount(8) after booting. */ #define ROOTNAME "root_device" static int iso_mountfs __P((struct vnode *devvp, struct mount *mp, struct proc *p, struct iso_args *argp)); int cd9660_mountroot() { register struct mount *mp; struct proc *p = curproc; /* XXX */ struct iso_mnt *imp; u_int size; int error; struct iso_args args; /* * Get vnodes for swapdev and rootdev. */ if (bdevvp(swapdev, &swapdev_vp) || bdevvp(rootdev, &rootvp)) panic("cd9660_mountroot: can't setup bdevvp's"); mp = malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK); bzero((char *)mp, (u_long)sizeof(struct mount)); mp->mnt_op = &cd9660_vfsops; mp->mnt_flag = MNT_RDONLY; args.flags = ISOFSMNT_ROOT; if ((error = iso_mountfs(rootvp, mp, p, &args))) { free(mp, M_MOUNT); return (error); } if ((error = vfs_lock(mp))) { (void)cd9660_unmount(mp, 0, p); free(mp, M_MOUNT); return (error); } TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list); mp->mnt_flag |= MNT_ROOTFS; mp->mnt_vnodecovered = NULLVP; imp = VFSTOISOFS(mp); bzero(imp->im_fsmnt, sizeof(imp->im_fsmnt)); imp->im_fsmnt[0] = '/'; bcopy((caddr_t)imp->im_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname, MNAMELEN); (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size); bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); (void) cd9660_statfs(mp, &mp->mnt_stat, p); vfs_unlock(mp); return (0); } /* * Flag to allow forcible unmounting. */ int iso_doforce = 1; /* * VFS Operations. * * mount system call */ int cd9660_mount(mp, path, data, ndp, p) register struct mount *mp; char *path; caddr_t data; struct nameidata *ndp; struct proc *p; { struct vnode *devvp; struct iso_args args; u_int size; int error; struct iso_mnt *imp = 0; if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args)))) return (error); if ((mp->mnt_flag & MNT_RDONLY) == 0) return (EROFS); /* * If updating, check whether changing from read-only to * read/write; if there is no device name, that's all we do. */ if (mp->mnt_flag & MNT_UPDATE) { imp = VFSTOISOFS(mp); if (args.fspec == 0) return (vfs_export(mp, &imp->im_export, &args.export)); } /* * Not an update, or updating the name: look up the name * and verify that it refers to a sensible block device. */ NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); if ((error = namei(ndp))) return (error); devvp = ndp->ni_vp; if (devvp->v_type != VBLK) { vrele(devvp); return ENOTBLK; } if (major(devvp->v_rdev) >= nblkdev) { vrele(devvp); return ENXIO; } if ((mp->mnt_flag & MNT_UPDATE) == 0) error = iso_mountfs(devvp, mp, p, &args); else { if (devvp != imp->im_devvp) error = EINVAL; /* needs translation */ else vrele(devvp); } if (error) { vrele(devvp); return error; } imp = VFSTOISOFS(mp); (void) copyinstr(path, imp->im_fsmnt, sizeof(imp->im_fsmnt)-1, &size); bzero(imp->im_fsmnt + size, sizeof(imp->im_fsmnt) - size); bcopy((caddr_t)imp->im_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname, MNAMELEN); (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size); bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); (void) cd9660_statfs(mp, &mp->mnt_stat, p); return 0; } /* * Common code for mount and mountroot */ static int iso_mountfs(devvp, mp, p, argp) register struct vnode *devvp; struct mount *mp; struct proc *p; struct iso_args *argp; { register struct iso_mnt *isomp = (struct iso_mnt *)0; struct buf *bp = NULL; dev_t dev = devvp->v_rdev; int error = EINVAL; int needclose = 0; int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; int iso_bsize; int iso_blknum; struct iso_volume_descriptor *vdp; struct iso_primary_descriptor *pri; struct iso_directory_record *rootp; int logical_block_size; if (!ronly) return EROFS; /* * Disallow multiple mounts of the same device. * Disallow mounting of a device that is currently in use * (except for root, which might share swap device for miniroot). * Flush out any old buffers remaining from a previous use. */ if ((error = vfs_mountedon(devvp))) return error; if (vcount(devvp) > 1 && devvp != rootvp) return EBUSY; if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0))) return (error); if ((error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p))) return error; needclose = 1; /* This is the "logical sector size". The standard says this * should be 2048 or the physical sector size on the device, * whichever is greater. For now, we'll just use a constant. */ iso_bsize = ISO_DEFAULT_BLOCK_SIZE; for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { if ((error = bread (devvp, btodb(iso_blknum * iso_bsize), iso_bsize, NOCRED, &bp))) goto out; vdp = (struct iso_volume_descriptor *)bp->b_un.b_addr; if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { error = EINVAL; goto out; } if (isonum_711 (vdp->type) == ISO_VD_END) { error = EINVAL; goto out; } if (isonum_711 (vdp->type) == ISO_VD_PRIMARY) break; brelse(bp); } if (isonum_711 (vdp->type) != ISO_VD_PRIMARY) { error = EINVAL; goto out; } pri = (struct iso_primary_descriptor *)vdp; logical_block_size = isonum_723 (pri->logical_block_size); if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE || (logical_block_size & (logical_block_size - 1)) != 0) { error = EINVAL; goto out; } rootp = (struct iso_directory_record *)pri->root_directory_record; isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); bzero((caddr_t)isomp, sizeof *isomp); isomp->logical_block_size = logical_block_size; isomp->volume_space_size = isonum_733 (pri->volume_space_size); bcopy (rootp, isomp->root, sizeof isomp->root); isomp->root_extent = isonum_733 (rootp->extent); isomp->root_size = isonum_733 (rootp->size); isomp->im_bmask = logical_block_size - 1; isomp->im_bshift = 0; while ((1 << isomp->im_bshift) < isomp->logical_block_size) isomp->im_bshift++; bp->b_flags |= B_AGE; brelse(bp); bp = NULL; mp->mnt_data = (qaddr_t)isomp; mp->mnt_stat.f_fsid.val[0] = (long)dev; mp->mnt_stat.f_fsid.val[1] = MOUNT_CD9660; mp->mnt_maxsymlinklen = 0; mp->mnt_flag |= MNT_LOCAL; isomp->im_mountp = mp; isomp->im_dev = dev; isomp->im_devvp = devvp; devvp->v_specflags |= SI_MOUNTEDON; /* Check the Rock Ridge Extention support */ if (!(argp->flags & ISOFSMNT_NORRIP)) { if ((error = bread (isomp->im_devvp, (isomp->root_extent + isonum_711(rootp->ext_attr_length)) * isomp->logical_block_size / DEV_BSIZE, isomp->logical_block_size,NOCRED,&bp))) goto out; rootp = (struct iso_directory_record *)bp->b_un.b_addr; if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { argp->flags |= ISOFSMNT_NORRIP; } else { argp->flags &= ~ISOFSMNT_GENS; } /* * The contents are valid, * but they will get reread as part of another vnode, so... */ bp->b_flags |= B_AGE; brelse(bp); bp = NULL; } isomp->im_flags = argp->flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS|ISOFSMNT_EXTATT); switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { default: isomp->iso_ftype = ISO_FTYPE_DEFAULT; break; case ISOFSMNT_GENS|ISOFSMNT_NORRIP: isomp->iso_ftype = ISO_FTYPE_9660; break; case 0: isomp->iso_ftype = ISO_FTYPE_RRIP; break; } return 0; out: if (bp) brelse(bp); if (needclose) (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p); if (isomp) { free((caddr_t)isomp, M_ISOFSMNT); mp->mnt_data = (qaddr_t)0; } return error; } /* * Make a filesystem operational. * Nothing to do at the moment. */ /* ARGSUSED */ int cd9660_start(mp, flags, p) struct mount *mp; int flags; struct proc *p; { return 0; } /* * unmount system call */ int cd9660_unmount(mp, mntflags, p) struct mount *mp; int mntflags; struct proc *p; { register struct iso_mnt *isomp; int error, flags = 0; if (mntflags & MNT_FORCE) { if (!iso_doforce) return (EINVAL); flags |= FORCECLOSE; } #if 0 mntflushbuf(mp, 0); if (mntinvalbuf(mp)) return EBUSY; #endif if ((error = vflush(mp, NULLVP, flags))) return (error); isomp = VFSTOISOFS(mp); #ifdef ISODEVMAP if (isomp->iso_ftype == ISO_FTYPE_RRIP) iso_dunmap(isomp->im_dev); #endif isomp->im_devvp->v_specflags &= ~SI_MOUNTEDON; error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p); vrele(isomp->im_devvp); free((caddr_t)isomp, M_ISOFSMNT); mp->mnt_data = (qaddr_t)0; mp->mnt_flag &= ~MNT_LOCAL; return (error); } /* * Return root of a filesystem */ int cd9660_root(mp, vpp) struct mount *mp; struct vnode **vpp; { register struct iso_node *ip; struct iso_node tip, *nip; struct vnode tvp; int error; struct iso_mnt *imp = VFSTOISOFS (mp); struct iso_directory_record *dp; tvp.v_mount = mp; tvp.v_data = &tip; ip = VTOI(&tvp); ip->i_vnode = &tvp; ip->i_dev = imp->im_dev; ip->i_diroff = 0; dp = (struct iso_directory_record *)imp->root; isodirino(&ip->i_number,dp,imp); /* * With RRIP we must use the `.' entry of the root directory. * Simply tell iget, that it's a relocated directory. */ error = iso_iget(ip,ip->i_number, imp->iso_ftype == ISO_FTYPE_RRIP, &nip,dp); if (error) return error; *vpp = ITOV(nip); return 0; } /* * Do operations associated with quotas, not supported */ /* ARGSUSED */ int cd9660_quotactl(mp, cmd, uid, arg, p) struct mount *mp; int cmd; uid_t uid; caddr_t arg; struct proc *p; { return (EOPNOTSUPP); } /* * Get file system statistics. */ int cd9660_statfs(mp, sbp, p) struct mount *mp; register struct statfs *sbp; struct proc *p; { register struct iso_mnt *isomp; isomp = VFSTOISOFS(mp); sbp->f_type = MOUNT_CD9660; sbp->f_bsize = isomp->logical_block_size; sbp->f_iosize = sbp->f_bsize; /* XXX */ sbp->f_blocks = isomp->volume_space_size; sbp->f_bfree = 0; /* total free blocks */ sbp->f_bavail = 0; /* blocks free for non superuser */ sbp->f_files = 0; /* total files */ sbp->f_ffree = 0; /* free file nodes */ if (sbp != &mp->mnt_stat) { bcopy((caddr_t)mp->mnt_stat.f_mntonname, (caddr_t)&sbp->f_mntonname[0], MNAMELEN); bcopy((caddr_t)mp->mnt_stat.f_mntfromname, (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); } /* Use the first spare for flags: */ sbp->f_spare[0] = isomp->im_flags; return 0; } /* ARGSUSED */ int cd9660_sync(mp, waitfor, cred, p) struct mount *mp; int waitfor; struct ucred *cred; struct proc *p; { return (0); } /* * Flat namespace lookup. * Currently unsupported. */ /* ARGSUSED */ int cd9660_vget(mp, ino, vpp) struct mount *mp; ino_t ino; struct vnode **vpp; { return (EOPNOTSUPP); } /* * File handle to vnode * * Have to be really careful about stale file handles: * - check that the inode number is in range * - call iget() to get the locked inode * - check for an unallocated inode (i_mode == 0) * - check that the generation number matches */ struct ifid { ushort ifid_len; ushort ifid_pad; int ifid_ino; long ifid_start; }; /* ARGSUSED */ int cd9660_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) register struct mount *mp; struct fid *fhp; struct mbuf *nam; struct vnode **vpp; int *exflagsp; struct ucred **credanonp; { struct vnode tvp; int error; int lbn, off; struct ifid *ifhp; struct iso_mnt *imp; struct buf *bp; struct iso_directory_record *dirp; struct iso_node tip, *ip, *nip; struct netcred *np; imp = VFSTOISOFS (mp); ifhp = (struct ifid *)fhp; #ifdef ISOFS_DBG printf("fhtovp: ino %d, start %ld\n", ifhp->ifid_ino, ifhp->ifid_start); #endif np = vfs_export_lookup(mp, &imp->im_export, nam); if (np == NULL) return (EACCES); lbn = iso_lblkno(imp, ifhp->ifid_ino); if (lbn >= imp->volume_space_size) { printf("fhtovp: lbn exceed volume space %d\n", lbn); return (ESTALE); } off = iso_blkoff(imp, ifhp->ifid_ino); if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { printf("fhtovp: crosses block boundary %d\n", off + ISO_DIRECTORY_RECORD_SIZE); return (ESTALE); } error = bread(imp->im_devvp, btodb(lbn * imp->logical_block_size), imp->logical_block_size, NOCRED, &bp); if (error) { printf("fhtovp: bread error %d\n",error); brelse(bp); return (error); } dirp = (struct iso_directory_record *)(bp->b_un.b_addr + off); if (off + isonum_711(dirp->length) > imp->logical_block_size) { brelse(bp); printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", off+isonum_711(dirp->length), off, isonum_711(dirp->length)); return (ESTALE); } if (isonum_733(dirp->extent) + isonum_711(dirp->ext_attr_length) != ifhp->ifid_start) { brelse(bp); printf("fhtovp: file start miss %d vs %ld\n", isonum_733(dirp->extent)+isonum_711(dirp->ext_attr_length), ifhp->ifid_start); return (ESTALE); } brelse(bp); ip = &tip; tvp.v_mount = mp; tvp.v_data = ip; ip->i_vnode = &tvp; ip->i_dev = imp->im_dev; if ((error = iso_iget(ip, ifhp->ifid_ino, 0, &nip, dirp))) { *vpp = NULLVP; printf("fhtovp: failed to get inode\n"); return (error); } ip = nip; /* * XXX need generation number? */ if (ip->inode.iso_mode == 0) { iso_iput(ip); *vpp = NULLVP; printf("fhtovp: inode mode == 0\n"); return (ESTALE); } *vpp = ITOV(ip); *exflagsp = np->netc_exflags; *credanonp = &np->netc_anon; return 0; } /* * Vnode pointer to File handle */ /* ARGSUSED */ int cd9660_vptofh(vp, fhp) struct vnode *vp; struct fid *fhp; { register struct iso_node *ip = VTOI(vp); register struct ifid *ifhp; ifhp = (struct ifid *)fhp; ifhp->ifid_len = sizeof(struct ifid); ifhp->ifid_ino = ip->i_number; ifhp->ifid_start = ip->iso_start; #ifdef ISOFS_DBG printf("vptofh: ino %d, start %ld\n", ifhp->ifid_ino,ifhp->ifid_start); #endif return 0; }