/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright (c) 1990, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2011 Bayard G. Bell. All rights reserved. * Copyright 2013 Joyent, Inc. All rights reserved. */ /* * VFS operations for High Sierra filesystem */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "fs/fs_subr.h" #include #include #include /* * These are needed for the CDROMREADOFFSET Code */ #include #include #define HSFS_CLKSET #include /* * Options for mount. */ #define HOPT_GLOBAL MNTOPT_GLOBAL #define HOPT_NOGLOBAL MNTOPT_NOGLOBAL #define HOPT_MAPLCASE "maplcase" #define HOPT_NOMAPLCASE "nomaplcase" #define HOPT_NOTRAILDOT "notraildot" #define HOPT_TRAILDOT "traildot" #define HOPT_NRR "nrr" #define HOPT_RR "rr" #define HOPT_JOLIET "joliet" #define HOPT_NOJOLIET "nojoliet" #define HOPT_JOLIETLONG "jolietlong" #define HOPT_VERS2 "vers2" #define HOPT_NOVERS2 "novers2" #define HOPT_RO MNTOPT_RO static char *global_cancel[] = { HOPT_NOGLOBAL, NULL }; static char *noglobal_cancel[] = { HOPT_GLOBAL, NULL }; static char *mapl_cancel[] = { HOPT_NOMAPLCASE, NULL }; static char *nomapl_cancel[] = { HOPT_MAPLCASE, NULL }; static char *ro_cancel[] = { MNTOPT_RW, NULL }; static char *rr_cancel[] = { HOPT_NRR, NULL }; static char *nrr_cancel[] = { HOPT_RR, NULL }; static char *joliet_cancel[] = { HOPT_NOJOLIET, NULL }; static char *nojoliet_cancel[] = { HOPT_JOLIET, NULL }; static char *vers2_cancel[] = { HOPT_NOVERS2, NULL }; static char *novers2_cancel[] = { HOPT_VERS2, NULL }; static char *trail_cancel[] = { HOPT_NOTRAILDOT, NULL }; static char *notrail_cancel[] = { HOPT_TRAILDOT, NULL }; static mntopt_t hsfs_options[] = { { HOPT_GLOBAL, global_cancel, NULL, 0, NULL }, { HOPT_NOGLOBAL, noglobal_cancel, NULL, MO_DEFAULT, NULL }, { HOPT_MAPLCASE, mapl_cancel, NULL, MO_DEFAULT, NULL }, { HOPT_NOMAPLCASE, nomapl_cancel, NULL, 0, NULL }, { HOPT_RO, ro_cancel, NULL, MO_DEFAULT, NULL }, { HOPT_RR, rr_cancel, NULL, MO_DEFAULT, NULL }, { HOPT_NRR, nrr_cancel, NULL, 0, NULL }, { HOPT_JOLIET, joliet_cancel, NULL, 0, NULL }, { HOPT_NOJOLIET, nojoliet_cancel, NULL, 0, NULL }, { HOPT_JOLIETLONG, NULL, NULL, 0, NULL }, { HOPT_VERS2, vers2_cancel, NULL, 0, NULL }, { HOPT_NOVERS2, novers2_cancel, NULL, 0, NULL }, { HOPT_TRAILDOT, trail_cancel, NULL, MO_DEFAULT, NULL }, { HOPT_NOTRAILDOT, notrail_cancel, NULL, 0, NULL }, { "sector", NULL, "0", MO_HASVALUE, NULL}, }; static mntopts_t hsfs_proto_opttbl = { sizeof (hsfs_options) / sizeof (mntopt_t), hsfs_options }; /* * Indicates whether to enable the I/O scheduling and readahead logic * 1 - Enable, 0 - Do not Enable. * Debugging purposes. */ int do_schedio = 1; static int hsfsfstype; static int hsfsinit(int, char *); static vfsdef_t vfw = { VFSDEF_VERSION, "hsfs", hsfsinit, /* We don't suppport remounting */ VSW_HASPROTO|VSW_STATS|VSW_CANLOFI, &hsfs_proto_opttbl }; static struct modlfs modlfs = { &mod_fsops, "filesystem for HSFS", &vfw }; static struct modlinkage modlinkage = { MODREV_1, (void *)&modlfs, NULL }; extern void hsched_init_caches(void); extern void hsched_fini_caches(void); int _init(void) { return (mod_install(&modlinkage)); } int _fini(void) { int error; error = mod_remove(&modlinkage); DTRACE_PROBE1(mod_remove, int, error); if (error) return (error); mutex_destroy(&hs_mounttab_lock); /* * Tear down the operations vectors */ (void) vfs_freevfsops_by_type(hsfsfstype); vn_freevnodeops(hsfs_vnodeops); hs_fini_hsnode_cache(); hsched_fini_caches(); return (0); } int _info(struct modinfo *modinfop) { return (mod_info(&modlinkage, modinfop)); } #define BDEVFLAG(dev) ((devopsp[getmajor(dev)])->devo_cb_ops->cb_flag) kmutex_t hs_mounttab_lock; struct hsfs *hs_mounttab = NULL; /* default mode, uid, gid */ mode_t hsfs_default_mode = 0555; uid_t hsfs_default_uid = 0; gid_t hsfs_default_gid = 3; extern void hsched_init(struct hsfs *fsp, int fsid, struct modlinkage *modlinkage); extern void hsched_fini(struct hsfs_queue *hqueue); extern void hsfs_init_kstats(struct hsfs *fsp, int fsid); extern void hsfs_fini_kstats(struct hsfs *fsp); static int hsfs_mount(struct vfs *vfsp, struct vnode *mvp, struct mounta *uap, struct cred *cr); static int hsfs_unmount(struct vfs *vfsp, int, struct cred *cr); static int hsfs_root(struct vfs *vfsp, struct vnode **vpp); static int hsfs_statvfs(struct vfs *vfsp, struct statvfs64 *sbp); static int hsfs_vget(struct vfs *vfsp, struct vnode **vpp, struct fid *fidp); static int hsfs_mountroot(struct vfs *, enum whymountroot); static int hs_mountfs(struct vfs *vfsp, dev_t dev, char *path, mode_t mode, int flags, struct cred *cr, int isroot); static int hs_getrootvp(struct vfs *vfsp, struct hsfs *fsp, size_t pathsize); static int hs_findhsvol(struct hsfs *fsp, struct vnode *vp, struct hs_volume *hvp); static int hs_parsehsvol(struct hsfs *fsp, uchar_t *volp, struct hs_volume *hvp); static int hs_findisovol(struct hsfs *fsp, struct vnode *vp, struct hs_volume *hvp, struct hs_volume *svp, struct hs_volume *jvp); static int hs_joliet_level(uchar_t *volp); static int hs_parseisovol(struct hsfs *fsp, uchar_t *volp, struct hs_volume *hvp); static void hs_copylabel(struct hs_volume *, unsigned char *, int); static int hs_getmdev(struct vfs *, char *fspec, int flags, dev_t *pdev, mode_t *mode, cred_t *cr); static int hs_findvoldesc(dev_t rdev, int desc_sec); static int hsfsinit(int fstype, char *name) { static const fs_operation_def_t hsfs_vfsops_template[] = { VFSNAME_MOUNT, { .vfs_mount = hsfs_mount }, VFSNAME_UNMOUNT, { .vfs_unmount = hsfs_unmount }, VFSNAME_ROOT, { .vfs_root = hsfs_root }, VFSNAME_STATVFS, { .vfs_statvfs = hsfs_statvfs }, VFSNAME_VGET, { .vfs_vget = hsfs_vget }, VFSNAME_MOUNTROOT, { .vfs_mountroot = hsfs_mountroot }, NULL, NULL }; int error; error = vfs_setfsops(fstype, hsfs_vfsops_template, NULL); if (error != 0) { cmn_err(CE_WARN, "hsfsinit: bad vfs ops template"); return (error); } error = vn_make_ops(name, hsfs_vnodeops_template, &hsfs_vnodeops); if (error != 0) { (void) vfs_freevfsops_by_type(fstype); cmn_err(CE_WARN, "hsfsinit: bad vnode ops template"); return (error); } hsfsfstype = fstype; mutex_init(&hs_mounttab_lock, NULL, MUTEX_DEFAULT, NULL); hs_init_hsnode_cache(); hsched_init_caches(); return (0); } /*ARGSUSED*/ static int hsfs_mount(struct vfs *vfsp, struct vnode *mvp, struct mounta *uap, struct cred *cr) { int vnode_busy; dev_t dev; struct pathname dpn; int error; mode_t mode; int flags; /* this will hold the mount specific data */ if ((error = secpolicy_fs_mount(cr, mvp, vfsp)) != 0) return (error); if (mvp->v_type != VDIR) return (ENOTDIR); /* mount option must be read only, else mount will be rejected */ if (!(uap->flags & MS_RDONLY)) return (EROFS); /* * We already told the framework that we don't support remounting. */ ASSERT(!(uap->flags & MS_REMOUNT)); mutex_enter(&mvp->v_lock); vnode_busy = (mvp->v_count != 1) || (mvp->v_flag & VROOT); mutex_exit(&mvp->v_lock); if ((uap->flags & MS_OVERLAY) == 0 && vnode_busy) { return (EBUSY); } /* * Check for the options that actually affect things * at our level. */ flags = 0; if (vfs_optionisset(vfsp, HOPT_NOMAPLCASE, NULL)) flags |= HSFSMNT_NOMAPLCASE; if (vfs_optionisset(vfsp, HOPT_NOTRAILDOT, NULL)) flags |= HSFSMNT_NOTRAILDOT; if (vfs_optionisset(vfsp, HOPT_NRR, NULL)) flags |= HSFSMNT_NORRIP; if (vfs_optionisset(vfsp, HOPT_NOJOLIET, NULL)) flags |= HSFSMNT_NOJOLIET; if (vfs_optionisset(vfsp, HOPT_JOLIETLONG, NULL)) flags |= HSFSMNT_JOLIETLONG; if (vfs_optionisset(vfsp, HOPT_NOVERS2, NULL)) flags |= HSFSMNT_NOVERS2; error = pn_get(uap->dir, (uap->flags & MS_SYSSPACE) ? UIO_SYSSPACE : UIO_USERSPACE, &dpn); if (error) return (error); error = hs_getmdev(vfsp, uap->spec, uap->flags, &dev, &mode, cr); if (error != 0) { pn_free(&dpn); return (error); } /* * If the device is a tape, return error */ if ((BDEVFLAG(dev) & D_TAPE) == D_TAPE) { pn_free(&dpn); return (ENOTBLK); } /* * Mount the filesystem. */ error = hs_mountfs(vfsp, dev, dpn.pn_path, mode, flags, cr, 0); pn_free(&dpn); return (error); } /*ARGSUSED*/ static int hsfs_unmount( struct vfs *vfsp, int flag, struct cred *cr) { struct hsfs **tspp; struct hsfs *fsp; if (secpolicy_fs_unmount(cr, vfsp) != 0) return (EPERM); /* * forced unmount is not supported by this file system * and thus, ENOTSUP is being returned. */ if (flag & MS_FORCE) return (ENOTSUP); fsp = VFS_TO_HSFS(vfsp); if (fsp->hsfs_rootvp->v_count != 1) return (EBUSY); /* destroy all old pages and hsnodes for this vfs */ if (hs_synchash(vfsp)) return (EBUSY); mutex_enter(&hs_mounttab_lock); for (tspp = &hs_mounttab; *tspp != NULL; tspp = &(*tspp)->hsfs_next) { if (*tspp == fsp) break; } if (*tspp == NULL) { mutex_exit(&hs_mounttab_lock); panic("hsfs_unmount: vfs not mounted?"); /*NOTREACHED*/ } *tspp = fsp->hsfs_next; mutex_exit(&hs_mounttab_lock); hsfs_fini_kstats(fsp); (void) VOP_CLOSE(fsp->hsfs_devvp, FREAD, 1, (offset_t)0, cr, NULL); VN_RELE(fsp->hsfs_devvp); /* free path table space */ if (fsp->hsfs_ptbl != NULL) kmem_free(fsp->hsfs_ptbl, (size_t)fsp->hsfs_vol.ptbl_len); /* free path table index table */ if (fsp->hsfs_ptbl_idx != NULL) kmem_free(fsp->hsfs_ptbl_idx, (size_t) (fsp->hsfs_ptbl_idx_size * sizeof (struct ptable_idx))); /* free "mounted on" pathame */ if (fsp->hsfs_fsmnt != NULL) kmem_free(fsp->hsfs_fsmnt, strlen(fsp->hsfs_fsmnt) + 1); hsched_fini(fsp->hqueue); kmem_free(fsp->hqueue, sizeof (struct hsfs_queue)); mutex_destroy(&fsp->hsfs_free_lock); rw_destroy(&fsp->hsfs_hash_lock); kmem_free(fsp, sizeof (*fsp)); return (0); } /*ARGSUSED*/ static int hsfs_root(struct vfs *vfsp, struct vnode **vpp) { *vpp = (VFS_TO_HSFS(vfsp))->hsfs_rootvp; VN_HOLD(*vpp); return (0); } /*ARGSUSED*/ static int hsfs_statvfs(struct vfs *vfsp, struct statvfs64 *sbp) { struct hsfs *fsp; dev32_t d32; fsp = VFS_TO_HSFS(vfsp); if (fsp->hsfs_magic != HSFS_MAGIC) return (EINVAL); bzero(sbp, sizeof (*sbp)); sbp->f_bsize = vfsp->vfs_bsize; sbp->f_frsize = sbp->f_bsize; /* no fragment, same as block size */ sbp->f_blocks = (fsblkcnt64_t)fsp->hsfs_vol.vol_size; sbp->f_bfree = (fsblkcnt64_t)0; sbp->f_bavail = (fsblkcnt64_t)0; sbp->f_files = (fsfilcnt64_t)-1; sbp->f_ffree = (fsfilcnt64_t)0; sbp->f_favail = (fsfilcnt64_t)0; (void) cmpldev(&d32, vfsp->vfs_dev); sbp->f_fsid = d32; (void) strcpy(sbp->f_basetype, vfssw[vfsp->vfs_fstype].vsw_name); sbp->f_flag = vf_to_stf(vfsp->vfs_flag); sbp->f_namemax = fsp->hsfs_namemax; (void) strcpy(sbp->f_fstr, fsp->hsfs_vol.vol_id); return (0); } /* * Previously nodeid was declared as uint32_t. This has been changed * to conform better with the ISO9660 standard. The standard states that * a LBN can be a 32 bit number, as the MAKE_NODEID macro shifts this * LBN 11 places left (LBN_TO_BYTE) and then shifts the result 5 right * (divide by 32) we are left with the potential of an overflow if * confined to a 32 bit value. */ static int hsfs_vget(struct vfs *vfsp, struct vnode **vpp, struct fid *fidp) { struct hsfid *fid; struct hsfs *fsp; ino64_t nodeid; int error; fsp = (struct hsfs *)VFS_TO_HSFS(vfsp); fid = (struct hsfid *)fidp; /* * Look for vnode on hashlist. * If found, it's now active and the refcnt was incremented. */ rw_enter(&fsp->hsfs_hash_lock, RW_READER); nodeid = fid->hf_ino; if ((*vpp = hs_findhash(nodeid, fid->hf_dir_lbn, (uint_t)fid->hf_dir_off, vfsp)) == NULL) { /* * Not in cache, so we need to remake it. * hs_remakenode() will read the directory entry * and then check again to see if anyone else has * put it in the cache. */ rw_exit(&fsp->hsfs_hash_lock); error = hs_remakenode(fid->hf_dir_lbn, (uint_t)fid->hf_dir_off, vfsp, vpp); return (error); } rw_exit(&fsp->hsfs_hash_lock); return (0); } #define CHECKSUM_SIZE (64 * 1024) /* * Compute a CD-ROM fsid by checksumming the first 64K of data on the CD * We use the 'fsp' argument to determine the location of the root * directory entry, and we start reading from there. */ static int compute_cdrom_id(struct hsfs *fsp, vnode_t *devvp) { uint_t secno; struct hs_volume *hsvp = &fsp->hsfs_vol; struct buf *bp; int error; int fsid; secno = hsvp->root_dir.ext_lbn >> hsvp->lbn_secshift; bp = bread(devvp->v_rdev, secno * 4, CHECKSUM_SIZE); error = geterror(bp); /* * An error on read or a partial read means we asked * for a nonexistant/corrupted piece of the device * (including past-the-end of the media). Don't * try to use the checksumming method then. */ if (!error && bp->b_bcount == CHECKSUM_SIZE) { int *ibuf = (int *)bp->b_un.b_addr; int i; fsid = 0; for (i = 0; i < CHECKSUM_SIZE / sizeof (int); i++) fsid ^= ibuf[ i ]; } else { /* * Fallback - use creation date */ fsid = hsvp->cre_date.tv_sec; } brelse(bp); return (fsid); } /*ARGSUSED*/ static int hs_mountfs( struct vfs *vfsp, dev_t dev, char *path, mode_t mode, int mount_flags, struct cred *cr, int isroot) { struct vnode *devvp; struct hsfs *tsp; struct hsfs *fsp = NULL; struct vattr vap; struct hsnode *hp; int error; struct timeval tv; int fsid; int use_rrip; int use_vers2; int use_joliet; int has_rrip = 0; int has_vers2 = 0; int has_joliet = 0; int force_rrip_off; int force_vers2_off; int force_joliet_off; size_t pathbufsz = strlen(path) + 1; int redo_rootvp; struct hs_volume *svp = NULL; /* Supplemental VD for ISO-9660:1999 */ struct hs_volume *jvp = NULL; /* Joliet VD */ /* * The rules for which extension will be used are: * 1. No specific mount options given: * - use rrip if available * - use ISO9660:1999 if available * - use joliet if available. * 2. rrip/ISO9660:1999/joliet explicitly disabled via mount option: * - use next "lower" extension * 3. joliet/ISO9660:1999/rrip explicitly requested via mount option: * - disable rrip support even if available * - disable IOS9660:1999 support even if available * * We need to adjust these flags as we discover the extensions * present. See below. These are just the starting values. */ use_rrip = (mount_flags & HSFSMNT_NORRIP) == 0; use_vers2 = (mount_flags & HSFSMNT_NOVERS2) == 0; use_joliet = (mount_flags & HSFSMNT_NOJOLIET) == 0; /* * Open the device */ devvp = makespecvp(dev, VBLK); ASSERT(devvp != 0); /* * Open the target device (file) for read only. */ if (error = VOP_OPEN(&devvp, FREAD, cr, NULL)) { VN_RELE(devvp); return (error); } /* * Refuse to go any further if this * device is being used for swapping */ if (IS_SWAPVP(common_specvp(devvp))) { error = EBUSY; goto cleanup; } vap.va_mask = AT_SIZE; if ((error = VOP_GETATTR(devvp, &vap, ATTR_COMM, cr, NULL)) != 0) { cmn_err(CE_NOTE, "Cannot get attributes of the CD-ROM driver"); goto cleanup; } /* * Make sure we have a nonzero size partition. * The current version of the SD driver will *not* fail the open * of such a partition so we have to check for it here. */ if (vap.va_size == 0) { error = ENXIO; goto cleanup; } /* * Init a new hsfs structure. */ fsp = kmem_zalloc(sizeof (*fsp), KM_SLEEP); svp = kmem_zalloc(sizeof (*svp), KM_SLEEP); jvp = kmem_zalloc(sizeof (*jvp), KM_SLEEP); /* hardwire perms, uid, gid */ fsp->hsfs_vol.vol_uid = hsfs_default_uid; fsp->hsfs_vol.vol_gid = hsfs_default_gid; fsp->hsfs_vol.vol_prot = hsfs_default_mode; svp->vol_uid = hsfs_default_uid; svp->vol_gid = hsfs_default_gid; svp->vol_prot = hsfs_default_mode; jvp->vol_uid = hsfs_default_uid; jvp->vol_gid = hsfs_default_gid; jvp->vol_prot = hsfs_default_mode; /* * Look for a Standard File Structure Volume Descriptor, * of which there must be at least one. * If found, check for volume size consistency. * * If svp->lbn_size is != 0, we did find a ISO-9660:1999 SVD * If jvp->lbn_size is != 0, we did find a Joliet SVD. */ fsp->hsfs_namemax = ISO_FILE_NAMELEN; fsp->hsfs_namelen = ISO_FILE_NAMELEN; error = hs_findisovol(fsp, devvp, &fsp->hsfs_vol, svp, jvp); if (error == EINVAL) /* no iso 9660 - try high sierra ... */ error = hs_findhsvol(fsp, devvp, &fsp->hsfs_vol); if (error) goto cleanup; DTRACE_PROBE4(findvol, struct hsfs *, fsp, struct hs_volume *, &fsp->hsfs_vol, struct hs_volume *, svp, struct hs_volume *, jvp); /* * Generate a file system ID from the CD-ROM, * and check it for uniqueness. * * What we are aiming for is some chance of integrity * across disk change. That is, if a client has an fhandle, * it will be valid as long as the same disk is mounted. */ fsid = compute_cdrom_id(fsp, devvp); mutex_enter(&hs_mounttab_lock); if (fsid == 0 || fsid == -1) { uniqtime(&tv); fsid = tv.tv_sec; } else /* make sure that the fsid is unique */ for (tsp = hs_mounttab; tsp != NULL; tsp = tsp->hsfs_next) { if (fsid == tsp->hsfs_vfs->vfs_fsid.val[0]) { uniqtime(&tv); fsid = tv.tv_sec; break; } } fsp->hsfs_next = hs_mounttab; hs_mounttab = fsp; fsp->hsfs_devvp = devvp; fsp->hsfs_vfs = vfsp; fsp->hsfs_fsmnt = kmem_alloc(pathbufsz, KM_SLEEP); (void) strlcpy(fsp->hsfs_fsmnt, path, pathbufsz); mutex_init(&fsp->hsfs_free_lock, NULL, MUTEX_DEFAULT, NULL); rw_init(&fsp->hsfs_hash_lock, NULL, RW_DEFAULT, NULL); vfsp->vfs_data = (caddr_t)fsp; vfsp->vfs_dev = dev; vfsp->vfs_fstype = hsfsfstype; vfsp->vfs_bsize = fsp->hsfs_vol.lbn_size; /* %% */ vfsp->vfs_fsid.val[0] = fsid; vfsp->vfs_fsid.val[1] = hsfsfstype; if (!hs_getrootvp(vfsp, fsp, pathbufsz)) { DTRACE_PROBE1(rootvp__failed, struct hsfs *, fsp); error = EINVAL; goto cleanup; } DTRACE_PROBE1(rootvp, struct hsfs *, fsp); /* * Attempt to discover a RR extension. */ if (use_rrip) { hp = VTOH(fsp->hsfs_rootvp); hs_check_root_dirent(fsp->hsfs_rootvp, &(hp->hs_dirent)); } has_rrip = IS_RRIP_IMPLEMENTED(fsp); has_vers2 = (svp->lbn_size != 0); has_joliet = (jvp->lbn_size != 0); DTRACE_PROBE4(voltype__suggested, struct hsfs *, fsp, int, use_rrip, int, use_vers2, int, use_joliet); DTRACE_PROBE4(voltype__actual, struct hsfs *, fsp, int, has_rrip, int, has_vers2, int, has_joliet); DTRACE_PROBE4(findvol, struct hsfs *, fsp, struct hs_volume *, &fsp->hsfs_vol, struct hs_volume *, svp, struct hs_volume *, jvp); force_rrip_off = !use_rrip || (vfs_optionisset(vfsp, HOPT_JOLIET, NULL) && has_joliet) || (vfs_optionisset(vfsp, HOPT_VERS2, NULL) && has_vers2); force_vers2_off = !use_vers2 || (vfs_optionisset(vfsp, HOPT_JOLIET, NULL) && has_joliet); force_joliet_off = !use_joliet; DTRACE_PROBE4(voltype__force_off, struct hsfs *, fsp, int, force_rrip_off, int, force_vers2_off, int, force_joliet_off); /* * At the moment, we have references of all three possible * extensions (RR, ISO9660:1999/v2 and Joliet) if present. * * The "active" volume descriptor is RRIP (or ISO9660:1988). * We now switch to the user-requested one. */ redo_rootvp = 0; if (force_rrip_off || !has_rrip) { if (has_vers2 && !force_vers2_off) { VN_RELE(fsp->hsfs_rootvp); bcopy(svp, &fsp->hsfs_vol, sizeof (struct hs_volume)); fsp->hsfs_vol_type = HS_VOL_TYPE_ISO_V2; vfsp->vfs_bsize = fsp->hsfs_vol.lbn_size; redo_rootvp = 1; has_joliet = 0; } else if (has_joliet && !force_joliet_off) { VN_RELE(fsp->hsfs_rootvp); bcopy(jvp, &fsp->hsfs_vol, sizeof (struct hs_volume)); fsp->hsfs_vol_type = HS_VOL_TYPE_JOLIET; vfsp->vfs_bsize = fsp->hsfs_vol.lbn_size; redo_rootvp = 1; has_vers2 = 0; } } if (redo_rootvp) { /* * Make sure not to use Rock Ridge. */ UNSET_IMPL_BIT(fsp, RRIP_BIT); UNSET_SUSP_BIT(fsp); has_rrip = 0; if (!hs_getrootvp(vfsp, fsp, pathbufsz)) { DTRACE_PROBE1(rootvp__failed, struct hsfs *, fsp); error = EINVAL; goto cleanup; } DTRACE_PROBE1(rootvp, struct hsfs *, fsp); } if (IS_RRIP_IMPLEMENTED(fsp)) { has_vers2 = 0; has_joliet = 0; } if (force_vers2_off) has_vers2 = 0; if (force_joliet_off) has_joliet = 0; DTRACE_PROBE4(voltype__taken, struct hsfs *, fsp, int, has_rrip, int, has_vers2, int, has_joliet); /* * mark root node as VROOT */ fsp->hsfs_rootvp->v_flag |= VROOT; /* Here we take care of some special case stuff for mountroot */ if (isroot) { fsp->hsfs_rootvp->v_rdev = devvp->v_rdev; rootvp = fsp->hsfs_rootvp; } if (IS_RRIP_IMPLEMENTED(fsp)) { /* * if RRIP, don't copy NOMAPLCASE or NOTRAILDOT to hsfs_flags */ mount_flags &= ~(HSFSMNT_NOMAPLCASE | HSFSMNT_NOTRAILDOT); fsp->hsfs_namemax = RRIP_FILE_NAMELEN; fsp->hsfs_namelen = RRIP_FILE_NAMELEN; ASSERT(vfs_optionisset(vfsp, HOPT_RR, NULL)); vfs_clearmntopt(vfsp, HOPT_VERS2); vfs_clearmntopt(vfsp, HOPT_JOLIET); } else switch (fsp->hsfs_vol_type) { case HS_VOL_TYPE_HS: case HS_VOL_TYPE_ISO: default: /* * if iso v1, don't allow trailing spaces in iso file names */ mount_flags |= HSFSMNT_NOTRAILSPACE; fsp->hsfs_namemax = ISO_NAMELEN_V2_MAX; fsp->hsfs_namelen = ISO_FILE_NAMELEN; vfs_clearmntopt(vfsp, HOPT_RR); vfs_clearmntopt(vfsp, HOPT_VERS2); vfs_clearmntopt(vfsp, HOPT_JOLIET); break; case HS_VOL_TYPE_ISO_V2: /* * if iso v2, don't copy NOTRAILDOT to hsfs_flags */ mount_flags &= ~HSFSMNT_NOTRAILDOT; mount_flags |= HSFSMNT_NOMAPLCASE | HSFSMNT_NOVERSION; fsp->hsfs_namemax = ISO_NAMELEN_V2_MAX; fsp->hsfs_namelen = ISO_NAMELEN_V2; vfs_setmntopt(vfsp, HOPT_VERS2, NULL, 0); vfs_clearmntopt(vfsp, HOPT_RR); vfs_clearmntopt(vfsp, HOPT_JOLIET); break; case HS_VOL_TYPE_JOLIET: /* * if Joliet, don't copy NOMAPLCASE or NOTRAILDOT to hsfs_flags */ mount_flags &= ~(HSFSMNT_NOMAPLCASE | HSFSMNT_NOTRAILDOT); mount_flags |= HSFSMNT_NOMAPLCASE; if (mount_flags & HSFSMNT_JOLIETLONG) fsp->hsfs_namemax = JOLIET_NAMELEN_MAX*3; /* UTF-8 */ else fsp->hsfs_namemax = MAXNAMELEN-1; fsp->hsfs_namelen = JOLIET_NAMELEN*2; vfs_setmntopt(vfsp, HOPT_JOLIET, NULL, 0); vfs_clearmntopt(vfsp, HOPT_RR); vfs_clearmntopt(vfsp, HOPT_VERS2); break; } /* * Add the HSFSMNT_INODE pseudo mount flag to the current mount flags. */ fsp->hsfs_flags = mount_flags | (fsp->hsfs_flags & HSFSMNT_INODE); /* * Setup I/O Scheduling structures */ if (do_schedio) { fsp->hqueue = kmem_alloc(sizeof (struct hsfs_queue), KM_SLEEP); hsched_init(fsp, fsid, &modlinkage); } /* * Setup kstats */ hsfs_init_kstats(fsp, fsid); DTRACE_PROBE1(mount__done, struct hsfs *, fsp); /* * set the magic word */ fsp->hsfs_magic = HSFS_MAGIC; mutex_exit(&hs_mounttab_lock); kmem_free(svp, sizeof (*svp)); kmem_free(jvp, sizeof (*jvp)); return (0); cleanup: (void) VOP_CLOSE(devvp, FREAD, 1, (offset_t)0, cr, NULL); VN_RELE(devvp); if (fsp) kmem_free(fsp, sizeof (*fsp)); if (svp) kmem_free(svp, sizeof (*svp)); if (jvp) kmem_free(jvp, sizeof (*jvp)); return (error); } /* * Get the rootvp associated with fsp->hsfs_vol */ static int hs_getrootvp( struct vfs *vfsp, struct hsfs *fsp, size_t pathsize) { struct hsnode *hp; ASSERT(pathsize == strlen(fsp->hsfs_fsmnt) + 1); /* * If the root directory does not appear to be * valid, use what it points to as "." instead. * Some Defense Mapping Agency disks are non-conformant * in this way. */ if (!hsfs_valid_dir(&fsp->hsfs_vol.root_dir)) { hs_log_bogus_disk_warning(fsp, HSFS_ERR_BAD_ROOT_DIR, 0); if (hs_remakenode(fsp->hsfs_vol.root_dir.ext_lbn, (uint_t)0, vfsp, &fsp->hsfs_rootvp)) { hs_mounttab = hs_mounttab->hsfs_next; mutex_destroy(&fsp->hsfs_free_lock); rw_destroy(&fsp->hsfs_hash_lock); kmem_free(fsp->hsfs_fsmnt, pathsize); mutex_exit(&hs_mounttab_lock); return (0); } } else { fsp->hsfs_rootvp = hs_makenode(&fsp->hsfs_vol.root_dir, fsp->hsfs_vol.root_dir.ext_lbn, 0, vfsp); } /* XXX - ignore the path table for now */ fsp->hsfs_ptbl = NULL; hp = VTOH(fsp->hsfs_rootvp); hp->hs_ptbl_idx = NULL; return (1); } /* * hs_findhsvol() * * Locate the Standard File Structure Volume Descriptor and * parse it into an hs_volume structure. * * XXX - May someday want to look for Coded Character Set FSVD, too. */ static int hs_findhsvol(struct hsfs *fsp, struct vnode *vp, struct hs_volume *hvp) { struct buf *secbp; int i; int n; uchar_t *volp; int error; uint_t secno; secno = hs_findvoldesc(vp->v_rdev, HS_VOLDESC_SEC); secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); error = geterror(secbp); if (error != 0) { cmn_err(CE_NOTE, "hs_findhsvol: bread: error=(%d)", error); brelse(secbp); return (error); } volp = (uchar_t *)secbp->b_un.b_addr; /* * To avoid that we read the whole medium in case that someone prepares * a malicious "fs image", we read at most 32 blocks. */ for (n = 0; n < 32 && HSV_DESC_TYPE(volp) != VD_EOV; n++) { for (i = 0; i < HSV_ID_STRLEN; i++) if (HSV_STD_ID(volp)[i] != HSV_ID_STRING[i]) goto cantfind; if (HSV_STD_VER(volp) != HSV_ID_VER) goto cantfind; switch (HSV_DESC_TYPE(volp)) { case VD_SFS: /* Standard File Structure */ fsp->hsfs_vol_type = HS_VOL_TYPE_HS; error = hs_parsehsvol(fsp, volp, hvp); brelse(secbp); return (error); case VD_CCFS: /* Coded Character File Structure */ case VD_BOOT: case VD_UNSPEC: case VD_EOV: break; } brelse(secbp); ++secno; secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); error = geterror(secbp); if (error != 0) { cmn_err(CE_NOTE, "hs_findhsvol: bread: error=(%d)", error); brelse(secbp); return (error); } volp = (uchar_t *)secbp->b_un.b_addr; } cantfind: brelse(secbp); return (EINVAL); } /* * hs_parsehsvol * * Parse the Standard File Structure Volume Descriptor into * an hs_volume structure. We can't just bcopy it into the * structure because of byte-ordering problems. * */ static int hs_parsehsvol(struct hsfs *fsp, uchar_t *volp, struct hs_volume *hvp) { hvp->vol_size = HSV_VOL_SIZE(volp); hvp->lbn_size = HSV_BLK_SIZE(volp); if (hvp->lbn_size == 0) { cmn_err(CE_NOTE, "hs_parsehsvol: logical block size in the " "SFSVD is zero"); return (EINVAL); } hvp->lbn_shift = ffs((long)hvp->lbn_size) - 1; hvp->lbn_secshift = ffs((long)howmany(HS_SECTOR_SIZE, (int)hvp->lbn_size)) - 1; hvp->lbn_maxoffset = hvp->lbn_size - 1; hs_parse_longdate(HSV_cre_date(volp), &hvp->cre_date); hs_parse_longdate(HSV_mod_date(volp), &hvp->mod_date); hvp->file_struct_ver = HSV_FILE_STRUCT_VER(volp); hvp->ptbl_len = HSV_PTBL_SIZE(volp); hvp->vol_set_size = (ushort_t)HSV_SET_SIZE(volp); hvp->vol_set_seq = (ushort_t)HSV_SET_SEQ(volp); #if defined(_LITTLE_ENDIAN) hvp->ptbl_lbn = HSV_PTBL_MAN_LS(volp); #else hvp->ptbl_lbn = HSV_PTBL_MAN_MS(volp); #endif hs_copylabel(hvp, HSV_VOL_ID(volp), 0); /* * Make sure that lbn_size is a power of two and otherwise valid. */ if (hvp->lbn_size & ~(1 << hvp->lbn_shift)) { cmn_err(CE_NOTE, "hsfs: %d-byte logical block size not supported", hvp->lbn_size); return (EINVAL); } return (hs_parsedir(fsp, HSV_ROOT_DIR(volp), &hvp->root_dir, (char *)NULL, (int *)NULL, HDE_ROOT_DIR_REC_SIZE)); } /* * hs_findisovol() * * Locate the Primary Volume Descriptor * parse it into an hs_volume structure. * * XXX - Partition not yet done * * Except for fsp->hsfs_vol_type, no fsp member may be modified. * fsp->hsfs_vol is modified indirectly via the *hvp argument. */ static int hs_findisovol(struct hsfs *fsp, struct vnode *vp, struct hs_volume *hvp, struct hs_volume *svp, struct hs_volume *jvp) { struct buf *secbp; int i; int n; uchar_t *volp; int error; uint_t secno; int foundpvd = 0; int foundsvd = 0; int foundjvd = 0; int pvd_sum = 0; secno = hs_findvoldesc(vp->v_rdev, ISO_VOLDESC_SEC); secbp = bread(vp->v_rdev, secno * 4, ISO_SECTOR_SIZE); error = geterror(secbp); if (error != 0) { cmn_err(CE_NOTE, "hs_findisovol: bread: error=(%d)", error); brelse(secbp); return (error); } volp = (uchar_t *)secbp->b_un.b_addr; /* * To avoid that we read the whole medium in case that someone prepares * a malicious "fs image", we read at most 32 blocks. */ for (n = 0; n < 32 && ISO_DESC_TYPE(volp) != ISO_VD_EOV; n++) { for (i = 0; i < ISO_ID_STRLEN; i++) if (ISO_STD_ID(volp)[i] != ISO_ID_STRING[i]) goto cantfind; switch (ISO_DESC_TYPE(volp)) { case ISO_VD_PVD: /* Standard File Structure */ if (ISO_STD_VER(volp) != ISO_ID_VER) goto cantfind; if (foundpvd != 1) { fsp->hsfs_vol_type = HS_VOL_TYPE_ISO; if (error = hs_parseisovol(fsp, volp, hvp)) { brelse(secbp); return (error); } foundpvd = 1; for (i = 0; i < ISO_SECTOR_SIZE; i++) pvd_sum += volp[i]; } break; case ISO_VD_SVD: /* Supplementary Volume Descriptor */ if (ISO_STD_VER(volp) == ISO_ID_VER2 && foundsvd != 1) { fsp->hsfs_vol_type = HS_VOL_TYPE_ISO; if (error = hs_parseisovol(fsp, volp, svp)) { brelse(secbp); return (error); } foundsvd = 1; } if (hs_joliet_level(volp) >= 1 && foundjvd != 1) { fsp->hsfs_vol_type = HS_VOL_TYPE_ISO; if (error = hs_parseisovol(fsp, volp, jvp)) { brelse(secbp); return (error); } foundjvd = 1; } break; case ISO_VD_BOOT: break; case ISO_VD_VPD: /* currently cannot handle partition */ break; case VD_EOV: break; } brelse(secbp); ++secno; secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); error = geterror(secbp); if (error != 0) { cmn_err(CE_NOTE, "hs_findisovol: bread: error=(%d)", error); brelse(secbp); return (error); } volp = (uchar_t *)secbp->b_un.b_addr; } for (n = 0; n < 16; n++) { brelse(secbp); ++secno; secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); error = geterror(secbp); if (error != 0) { cmn_err(CE_NOTE, "hs_findisovol: bread: error=(%d)", error); brelse(secbp); return (error); } /* * Check for the signature from mkisofs that grants that * the current filesystem allows to use the extent lbn as * inode number even in pure ISO9660 mode. */ volp = (uchar_t *)secbp->b_un.b_addr; if (strncmp((char *)volp, "MKI ", 4) == 0) { int sum; sum = volp[2045]; sum *= 256; sum += volp[2046]; sum *= 256; sum += volp[2047]; if (sum == pvd_sum) fsp->hsfs_flags |= HSFSMNT_INODE; break; } } if (foundpvd) { brelse(secbp); return (0); } cantfind: brelse(secbp); return (EINVAL); } /* * Return 0 if no Joliet is found * else return Joliet Level 1..3 */ static int hs_joliet_level(uchar_t *volp) { if (ISO_std_ver(volp)[0] == ISO_ID_VER && ISO_svd_esc(volp)[0] == '%' && ISO_svd_esc(volp)[1] == '/') { switch (ISO_svd_esc(volp)[2]) { case '@': return (1); case 'C': return (2); case 'E': return (3); } } return (0); } /* * hs_parseisovol * * Parse the Primary Volume Descriptor into an hs_volume structure. * */ static int hs_parseisovol(struct hsfs *fsp, uchar_t *volp, struct hs_volume *hvp) { hvp->vol_size = ISO_VOL_SIZE(volp); hvp->lbn_size = ISO_BLK_SIZE(volp); if (hvp->lbn_size == 0) { cmn_err(CE_NOTE, "hs_parseisovol: logical block size in the " "PVD is zero"); return (EINVAL); } hvp->lbn_shift = ffs((long)hvp->lbn_size) - 1; hvp->lbn_secshift = ffs((long)howmany(ISO_SECTOR_SIZE, (int)hvp->lbn_size)) - 1; hvp->lbn_maxoffset = hvp->lbn_size - 1; hs_parse_longdate(ISO_cre_date(volp), &hvp->cre_date); hs_parse_longdate(ISO_mod_date(volp), &hvp->mod_date); hvp->file_struct_ver = ISO_FILE_STRUCT_VER(volp); hvp->ptbl_len = ISO_PTBL_SIZE(volp); hvp->vol_set_size = (ushort_t)ISO_SET_SIZE(volp); hvp->vol_set_seq = (ushort_t)ISO_SET_SEQ(volp); #if defined(_LITTLE_ENDIAN) hvp->ptbl_lbn = ISO_PTBL_MAN_LS(volp); #else hvp->ptbl_lbn = ISO_PTBL_MAN_MS(volp); #endif hs_copylabel(hvp, ISO_VOL_ID(volp), hs_joliet_level(volp) >= 1); /* * Make sure that lbn_size is a power of two and otherwise valid. */ if (hvp->lbn_size & ~(1 << hvp->lbn_shift)) { cmn_err(CE_NOTE, "hsfs: %d-byte logical block size not supported", hvp->lbn_size); return (EINVAL); } return (hs_parsedir(fsp, ISO_ROOT_DIR(volp), &hvp->root_dir, (char *)NULL, (int *)NULL, IDE_ROOT_DIR_REC_SIZE)); } /* * Common code for mount and umount. * Check that the user's argument is a reasonable * thing on which to mount, and return the device number if so. */ static int hs_getmdev(struct vfs *vfsp, char *fspec, int flags, dev_t *pdev, mode_t *mode, cred_t *cr) { int error; struct vnode *svp = NULL; struct vnode *lvp = NULL; struct vnode *bvp; struct vattr vap; dev_t dev; enum uio_seg fromspace = (flags & MS_SYSSPACE) ? UIO_SYSSPACE : UIO_USERSPACE; /* * Look up the device/file to be mounted. */ error = lookupname(fspec, fromspace, FOLLOW, NULLVPP, &svp); if (error) { if (error == ENOENT) error = ENODEV; goto out; } error = vfs_get_lofi(vfsp, &lvp); if (error > 0) { if (error == ENOENT) error = ENODEV; goto out; } else if (error == 0) { bvp = lvp; } else { bvp = svp; if (bvp->v_type != VBLK) { error = ENOTBLK; goto out; } if ((error = secpolicy_spec_open(cr, bvp, FREAD)) != 0) goto out; } /* * Can we read from the device/file ? */ if ((error = VOP_ACCESS(svp, VREAD, 0, cr, NULL)) != 0) goto out; vap.va_mask = AT_MODE; /* get protection mode */ (void) VOP_GETATTR(bvp, &vap, 0, CRED(), NULL); *mode = vap.va_mode; dev = *pdev = bvp->v_rdev; error = EBUSY; /* * Ensure that this device isn't already mounted, * unless this is a REMOUNT request or we are told to suppress * mount checks. */ if ((flags & MS_NOCHECK) == 0) { if (vfs_devmounting(dev, vfsp)) goto out; if (vfs_devismounted(dev) && !(flags & MS_REMOUNT)) goto out; } if (getmajor(*pdev) >= devcnt) { error = ENXIO; goto out; } error = 0; out: if (svp != NULL) VN_RELE(svp); if (lvp != NULL) VN_RELE(lvp); return (error); } static void hs_copylabel(struct hs_volume *hvp, unsigned char *label, int isjoliet) { char lbuf[64]; /* hs_joliet_cp() creates 48 bytes at most */ if (isjoliet) { /* * hs_joliet_cp() will output 16..48 bytes. * We need to clear 'lbuf' to avoid junk chars past byte 15. */ bzero(lbuf, sizeof (lbuf)); (void) hs_joliet_cp((char *)label, lbuf, 32); label = (unsigned char *)lbuf; } /* cdrom volid is at most 32 bytes */ bcopy(label, hvp->vol_id, 32); hvp->vol_id[31] = NULL; } /* * Mount root file system. * "why" is ROOT_INIT on initial call, ROOT_REMOUNT if called to * remount the root file system, and ROOT_UNMOUNT if called to * unmount the root (e.g., as part of a system shutdown). * * XXX - this may be partially machine-dependent; it, along with the VFS_SWAPVP * operation, goes along with auto-configuration. A mechanism should be * provided by which machine-INdependent code in the kernel can say "get me the * right root file system" and "get me the right initial swap area", and have * that done in what may well be a machine-dependent fashion. * Unfortunately, it is also file-system-type dependent (NFS gets it via * bootparams calls, UFS gets it from various and sundry machine-dependent * mechanisms, as SPECFS does for swap). */ static int hsfs_mountroot(struct vfs *vfsp, enum whymountroot why) { int error; struct hsfs *fsp; struct hs_volume *fvolp; static int hsfsrootdone = 0; dev_t rootdev; mode_t mode = 0; if (why == ROOT_INIT) { if (hsfsrootdone++) return (EBUSY); rootdev = getrootdev(); if (rootdev == (dev_t)NODEV) return (ENODEV); vfsp->vfs_dev = rootdev; vfsp->vfs_flag |= VFS_RDONLY; } else if (why == ROOT_REMOUNT) { cmn_err(CE_NOTE, "hsfs_mountroot: ROOT_REMOUNT"); return (0); } else if (why == ROOT_UNMOUNT) { return (0); } error = vfs_lock(vfsp); if (error) { cmn_err(CE_NOTE, "hsfs_mountroot: couldn't get vfs_lock"); return (error); } error = hs_mountfs(vfsp, rootdev, "/", mode, 1, CRED(), 1); /* * XXX - assumes root device is not indirect, because we don't set * rootvp. Is rootvp used for anything? If so, make another arg * to mountfs. */ if (error) { vfs_unlock(vfsp); if (rootvp) { VN_RELE(rootvp); rootvp = (struct vnode *)0; } return (error); } if (why == ROOT_INIT) vfs_add((struct vnode *)0, vfsp, (vfsp->vfs_flag & VFS_RDONLY) ? MS_RDONLY : 0); vfs_unlock(vfsp); fsp = VFS_TO_HSFS(vfsp); fvolp = &fsp->hsfs_vol; #ifdef HSFS_CLKSET if (fvolp->cre_date.tv_sec == 0) { cmn_err(CE_NOTE, "hsfs_mountroot: cre_date.tv_sec == 0"); if (fvolp->mod_date.tv_sec == 0) { cmn_err(CE_NOTE, "hsfs_mountroot: mod_date.tv_sec == 0"); cmn_err(CE_NOTE, "hsfs_mountroot: clkset(-1L)"); clkset(-1L); } else { clkset(fvolp->mod_date.tv_sec); } } else { clkset(fvolp->mod_date.tv_sec); } #else /* HSFS_CLKSET */ clkset(-1L); #endif /* HSFS_CLKSET */ return (0); } /* * hs_findvoldesc() * * Return the sector where the volume descriptor lives. This is * a fixed value for "normal" cd-rom's, but can change for * multisession cd's. * * desc_sec is the same for high-sierra and iso 9660 formats, why * there are two different #defines used in the code for this is * beyond me. These are standards, cast in concrete, right? * To be general, however, this function supports passing in different * values. */ static int hs_findvoldesc(dev_t rdev, int desc_sec) { int secno; int error; int rval; /* ignored */ #ifdef CDROMREADOFFSET /* * Issue the Read Offset ioctl directly to the * device. Ignore any errors and set starting * secno to the default, otherwise add the * VOLDESC sector number to the offset. */ error = cdev_ioctl(rdev, CDROMREADOFFSET, (intptr_t)&secno, FNATIVE|FKIOCTL|FREAD, CRED(), &rval); if (error) { secno = desc_sec; } else { secno += desc_sec; } #else secno = desc_sec; #endif return (secno); }