/* * Copyright (c) 1999-2005 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_OSREFERENCE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the * License may not be used to create, or enable the creation or * redistribution of, unlawful or unlicensed copies of an Apple operating * system, or to circumvent, violate, or enable the circumvention or * violation of, any terms of an Apple operating system software license * agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_OSREFERENCE_HEADER_END@ */ /* * Copyright (c) 1991, 1993, 1994 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, Inc. * * 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. * * hfs_vfsops.c * derived from @(#)ufs_vfsops.c 8.8 (Berkeley) 5/20/95 * * (c) Copyright 1997-2002 Apple Computer, Inc. All rights reserved. * * hfs_vfsops.c -- VFS layer for loadable HFS file system. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "hfs.h" #include "hfs_catalog.h" #include "hfs_cnode.h" #include "hfs_dbg.h" #include "hfs_endian.h" #include "hfs_hotfiles.h" #include "hfs_quota.h" #include "hfscommon/headers/FileMgrInternal.h" #include "hfscommon/headers/BTreesInternal.h" #if HFS_DIAGNOSTIC int hfs_dbg_all = 0; int hfs_dbg_err = 0; #endif lck_grp_attr_t * hfs_group_attr; lck_attr_t * hfs_lock_attr; lck_grp_t * hfs_mutex_group; lck_grp_t * hfs_rwlock_group; extern struct vnodeopv_desc hfs_vnodeop_opv_desc; extern void hfs_converterinit(void); extern void inittodr(time_t base); extern int hfs_write_access(struct vnode *, kauth_cred_t, struct proc *, Boolean); static int hfs_changefs(struct mount *mp, struct hfs_mount_args *args); static int hfs_fhtovp(struct mount *mp, int fhlen, unsigned char *fhp, struct vnode **vpp, vfs_context_t context); static int hfs_flushfiles(struct mount *, int, struct proc *); static int hfs_flushMDB(struct hfsmount *hfsmp, int waitfor, int altflush); static int hfs_getmountpoint(struct vnode *vp, struct hfsmount **hfsmpp); static int hfs_init(struct vfsconf *vfsp); static int hfs_mount(struct mount *mp, vnode_t devvp, user_addr_t data, vfs_context_t context); static int hfs_mountfs(struct vnode *devvp, struct mount *mp, struct hfs_mount_args *args, vfs_context_t context); static int hfs_reload(struct mount *mp, kauth_cred_t cred, struct proc *p); static int hfs_vfs_root(struct mount *mp, struct vnode **vpp, vfs_context_t context); static int hfs_quotactl(struct mount *, int, uid_t, caddr_t, vfs_context_t context); static int hfs_start(struct mount *mp, int flags, vfs_context_t context); static int hfs_statfs(struct mount *mp, register struct vfsstatfs *sbp, vfs_context_t context); static int hfs_sync(struct mount *mp, int waitfor, vfs_context_t context); static int hfs_sysctl(int *name, u_int namelen, user_addr_t oldp, size_t *oldlenp, user_addr_t newp, size_t newlen, vfs_context_t context); static int hfs_unmount(struct mount *mp, int mntflags, vfs_context_t context); static int hfs_vfs_vget(struct mount *mp, ino64_t ino, struct vnode **vpp, vfs_context_t context); static int hfs_vptofh(struct vnode *vp, int *fhlenp, unsigned char *fhp, vfs_context_t context); static int hfs_reclaimspace(struct hfsmount *hfsmp, u_long startblk); /* * Called by vfs_mountroot when mounting HFS Plus as root. */ __private_extern__ int hfs_mountroot(mount_t mp, vnode_t rvp, vfs_context_t context) { struct hfsmount *hfsmp; ExtendedVCB *vcb; struct vfsstatfs *vfsp; int error; if ((error = hfs_mountfs(rvp, mp, NULL, context))) return (error); /* Init hfsmp */ hfsmp = VFSTOHFS(mp); hfsmp->hfs_uid = UNKNOWNUID; hfsmp->hfs_gid = UNKNOWNGID; hfsmp->hfs_dir_mask = (S_IRWXU | S_IRGRP|S_IXGRP | S_IROTH|S_IXOTH); /* 0755 */ hfsmp->hfs_file_mask = (S_IRWXU | S_IRGRP|S_IXGRP | S_IROTH|S_IXOTH); /* 0755 */ /* Establish the free block reserve. */ vcb = HFSTOVCB(hfsmp); vcb->reserveBlocks = ((u_int64_t)vcb->totalBlocks * HFS_MINFREE) / 100; vcb->reserveBlocks = MIN(vcb->reserveBlocks, HFS_MAXRESERVE / vcb->blockSize); vfsp = vfs_statfs(mp); (void)hfs_statfs(mp, vfsp, NULL); return (0); } /* * VFS Operations. * * mount system call */ static int hfs_mount(struct mount *mp, vnode_t devvp, user_addr_t data, vfs_context_t context) { struct proc *p = vfs_context_proc(context); struct hfsmount *hfsmp = NULL; struct hfs_mount_args args; int retval = E_NONE; uint32_t cmdflags; if ((retval = copyin(data, (caddr_t)&args, sizeof(args)))) { return (retval); } cmdflags = (uint32_t)vfs_flags(mp) & MNT_CMDFLAGS; if (cmdflags & MNT_UPDATE) { hfsmp = VFSTOHFS(mp); /* Reload incore data after an fsck. */ if (cmdflags & MNT_RELOAD) { if (vfs_isrdonly(mp)) return hfs_reload(mp, vfs_context_ucred(context), p); else return (EINVAL); } /* Change to a read-only file system. */ if (((hfsmp->hfs_flags & HFS_READ_ONLY) == 0) && vfs_isrdonly(mp)) { int flags; /* use VFS_SYNC to push out System (btree) files */ retval = VFS_SYNC(mp, MNT_WAIT, context); if (retval && ((cmdflags & MNT_FORCE) == 0)) goto out; flags = WRITECLOSE; if (cmdflags & MNT_FORCE) flags |= FORCECLOSE; if ((retval = hfs_flushfiles(mp, flags, p))) goto out; hfsmp->hfs_flags |= HFS_READ_ONLY; retval = hfs_flushvolumeheader(hfsmp, MNT_WAIT, 0); /* also get the volume bitmap blocks */ if (!retval) { if (vnode_mount(hfsmp->hfs_devvp) == mp) { retval = hfs_fsync(hfsmp->hfs_devvp, MNT_WAIT, 0, p); } else { vnode_get(hfsmp->hfs_devvp); retval = VNOP_FSYNC(hfsmp->hfs_devvp, MNT_WAIT, context); vnode_put(hfsmp->hfs_devvp); } } if (retval) { hfsmp->hfs_flags &= ~HFS_READ_ONLY; goto out; } if (hfsmp->jnl) { hfs_global_exclusive_lock_acquire(hfsmp); journal_close(hfsmp->jnl); hfsmp->jnl = NULL; // Note: we explicitly don't want to shutdown // access to the jvp because we may need // it later if we go back to being read-write. hfs_global_exclusive_lock_release(hfsmp); } } /* Change to a writable file system. */ if (vfs_iswriteupgrade(mp)) { retval = hfs_flushvolumeheader(hfsmp, MNT_WAIT, 0); if (retval != E_NONE) goto out; // If the journal was shut-down previously because we were // asked to be read-only, let's start it back up again now if ( (HFSTOVCB(hfsmp)->vcbAtrb & kHFSVolumeJournaledMask) && hfsmp->jnl == NULL && hfsmp->jvp != NULL) { int jflags; if (hfsmp->hfs_flags & HFS_NEED_JNL_RESET) { jflags = JOURNAL_RESET; } else { jflags = 0; } hfs_global_exclusive_lock_acquire(hfsmp); hfsmp->jnl = journal_open(hfsmp->jvp, (hfsmp->jnl_start * HFSTOVCB(hfsmp)->blockSize) + (off_t)HFSTOVCB(hfsmp)->hfsPlusIOPosOffset, hfsmp->jnl_size, hfsmp->hfs_devvp, hfsmp->hfs_phys_block_size, jflags, 0, hfs_sync_metadata, hfsmp->hfs_mp); hfs_global_exclusive_lock_release(hfsmp); if (hfsmp->jnl == NULL) { retval = EINVAL; goto out; } else { hfsmp->hfs_flags &= ~HFS_NEED_JNL_RESET; } } /* Only clear HFS_READ_ONLY after a successfull write */ hfsmp->hfs_flags &= ~HFS_READ_ONLY; if (!(hfsmp->hfs_flags & (HFS_READ_ONLY & HFS_STANDARD))) { /* setup private/hidden directory for unlinked files */ FindMetaDataDirectory(HFSTOVCB(hfsmp)); hfs_remove_orphans(hfsmp); /* * Allow hot file clustering if conditions allow. */ if (hfsmp->hfs_flags & HFS_METADATA_ZONE) { (void) hfs_recording_init(hfsmp); } } } /* Update file system parameters. */ retval = hfs_changefs(mp, &args); } else /* not an update request */ { /* Set the mount flag to indicate that we support volfs */ vfs_setflags(mp, (uint64_t)((unsigned int)MNT_DOVOLFS)); retval = hfs_mountfs(devvp, mp, &args, context); } out: if (retval == 0) { (void)hfs_statfs(mp, vfs_statfs(mp), context); } return (retval); } struct hfs_changefs_cargs { struct hfsmount *hfsmp; int namefix; int permfix; int permswitch; }; static int hfs_changefs_callback(struct vnode *vp, void *cargs) { ExtendedVCB *vcb; struct cnode *cp; struct cat_desc cndesc; struct cat_attr cnattr; struct hfs_changefs_cargs *args; args = (struct hfs_changefs_cargs *)cargs; cp = VTOC(vp); vcb = HFSTOVCB(args->hfsmp); if (cat_lookup(args->hfsmp, &cp->c_desc, 0, &cndesc, &cnattr, NULL, NULL)) { /* * If we couldn't find this guy skip to the next one */ if (args->namefix) cache_purge(vp); return (VNODE_RETURNED); } /* * Get the real uid/gid and perm mask from disk. */ if (args->permswitch || args->permfix) { cp->c_uid = cnattr.ca_uid; cp->c_gid = cnattr.ca_gid; cp->c_mode = cnattr.ca_mode; } /* * If we're switching name converters then... * Remove the existing entry from the namei cache. * Update name to one based on new encoder. */ if (args->namefix) { cache_purge(vp); replace_desc(cp, &cndesc); if (cndesc.cd_cnid == kHFSRootFolderID) { strncpy(vcb->vcbVN, cp->c_desc.cd_nameptr, NAME_MAX); cp->c_desc.cd_encoding = args->hfsmp->hfs_encoding; } } else { cat_releasedesc(&cndesc); } return (VNODE_RETURNED); } /* Change fs mount parameters */ static int hfs_changefs(struct mount *mp, struct hfs_mount_args *args) { int retval = 0; int namefix, permfix, permswitch; struct hfsmount *hfsmp; ExtendedVCB *vcb; hfs_to_unicode_func_t get_unicode_func; unicode_to_hfs_func_t get_hfsname_func; u_long old_encoding = 0; struct hfs_changefs_cargs cargs; uint32_t mount_flags; hfsmp = VFSTOHFS(mp); vcb = HFSTOVCB(hfsmp); mount_flags = (unsigned int)vfs_flags(mp); permswitch = (((hfsmp->hfs_flags & HFS_UNKNOWN_PERMS) && ((mount_flags & MNT_UNKNOWNPERMISSIONS) == 0)) || (((hfsmp->hfs_flags & HFS_UNKNOWN_PERMS) == 0) && (mount_flags & MNT_UNKNOWNPERMISSIONS))); /* The root filesystem must operate with actual permissions: */ if (permswitch && (mount_flags & MNT_ROOTFS) && (mount_flags & MNT_UNKNOWNPERMISSIONS)) { vfs_clearflags(mp, (uint64_t)((unsigned int)MNT_UNKNOWNPERMISSIONS)); /* Just say "No". */ return EINVAL; } if (mount_flags & MNT_UNKNOWNPERMISSIONS) hfsmp->hfs_flags |= HFS_UNKNOWN_PERMS; else hfsmp->hfs_flags &= ~HFS_UNKNOWN_PERMS; namefix = permfix = 0; /* Change the timezone (Note: this affects all hfs volumes and hfs+ volume create dates) */ if (args->hfs_timezone.tz_minuteswest != VNOVAL) { gTimeZone = args->hfs_timezone; } /* Change the default uid, gid and/or mask */ if ((args->hfs_uid != (uid_t)VNOVAL) && (hfsmp->hfs_uid != args->hfs_uid)) { hfsmp->hfs_uid = args->hfs_uid; if (vcb->vcbSigWord == kHFSPlusSigWord) ++permfix; } if ((args->hfs_gid != (gid_t)VNOVAL) && (hfsmp->hfs_gid != args->hfs_gid)) { hfsmp->hfs_gid = args->hfs_gid; if (vcb->vcbSigWord == kHFSPlusSigWord) ++permfix; } if (args->hfs_mask != (mode_t)VNOVAL) { if (hfsmp->hfs_dir_mask != (args->hfs_mask & ALLPERMS)) { hfsmp->hfs_dir_mask = args->hfs_mask & ALLPERMS; hfsmp->hfs_file_mask = args->hfs_mask & ALLPERMS; if ((args->flags != VNOVAL) && (args->flags & HFSFSMNT_NOXONFILES)) hfsmp->hfs_file_mask = (args->hfs_mask & DEFFILEMODE); if (vcb->vcbSigWord == kHFSPlusSigWord) ++permfix; } } /* Change the hfs encoding value (hfs only) */ if ((vcb->vcbSigWord == kHFSSigWord) && (args->hfs_encoding != (u_long)VNOVAL) && (hfsmp->hfs_encoding != args->hfs_encoding)) { retval = hfs_getconverter(args->hfs_encoding, &get_unicode_func, &get_hfsname_func); if (retval) goto exit; /* * Connect the new hfs_get_unicode converter but leave * the old hfs_get_hfsname converter in place so that * we can lookup existing vnodes to get their correctly * encoded names. * * When we're all finished, we can then connect the new * hfs_get_hfsname converter and release our interest * in the old converters. */ hfsmp->hfs_get_unicode = get_unicode_func; old_encoding = hfsmp->hfs_encoding; hfsmp->hfs_encoding = args->hfs_encoding; ++namefix; } if (!(namefix || permfix || permswitch)) goto exit; /* XXX 3762912 hack to support HFS filesystem 'owner' */ if (permfix) vfs_setowner(mp, hfsmp->hfs_uid == UNKNOWNUID ? KAUTH_UID_NONE : hfsmp->hfs_uid, hfsmp->hfs_gid == UNKNOWNGID ? KAUTH_GID_NONE : hfsmp->hfs_gid); /* * For each active vnode fix things that changed * * Note that we can visit a vnode more than once * and we can race with fsync. * * hfs_changefs_callback will be called for each vnode * hung off of this mount point * the vnode will be * properly referenced and unreferenced around the callback */ cargs.hfsmp = hfsmp; cargs.namefix = namefix; cargs.permfix = permfix; cargs.permswitch = permswitch; vnode_iterate(mp, 0, hfs_changefs_callback, (void *)&cargs); /* * If we're switching name converters we can now * connect the new hfs_get_hfsname converter and * release our interest in the old converters. */ if (namefix) { hfsmp->hfs_get_hfsname = get_hfsname_func; vcb->volumeNameEncodingHint = args->hfs_encoding; (void) hfs_relconverter(old_encoding); } exit: return (retval); } struct hfs_reload_cargs { struct hfsmount *hfsmp; kauth_cred_t cred; struct proc *p; int error; }; static int hfs_reload_callback(struct vnode *vp, void *cargs) { struct cnode *cp; struct hfs_reload_cargs *args; args = (struct hfs_reload_cargs *)cargs; /* * flush all the buffers associated with this node */ (void) buf_invalidateblks(vp, 0, 0, 0); cp = VTOC(vp); /* * Remove any directory hints */ if (vnode_isdir(vp)) hfs_reldirhints(cp, 0); /* * Re-read cnode data for all active vnodes (non-metadata files). */ if (!vnode_issystem(vp) && !VNODE_IS_RSRC(vp)) { struct cat_fork *datafork; struct cat_desc desc; datafork = cp->c_datafork ? &cp->c_datafork->ff_data : NULL; /* lookup by fileID since name could have changed */ if ((args->error = cat_idlookup(args->hfsmp, cp->c_fileid, &desc, &cp->c_attr, datafork))) return (VNODE_RETURNED_DONE); /* update cnode's catalog descriptor */ (void) replace_desc(cp, &desc); } return (VNODE_RETURNED); } /* * Reload all incore data for a filesystem (used after running fsck on * the root filesystem and finding things to fix). The filesystem must * be mounted read-only. * * Things to do to update the mount: * invalidate all cached meta-data. * invalidate all inactive vnodes. * invalidate all cached file data. * re-read volume header from disk. * re-load meta-file info (extents, file size). * re-load B-tree header data. * re-read cnode data for all active vnodes. */ static int hfs_reload(struct mount *mountp, kauth_cred_t cred, struct proc *p) { register struct vnode *devvp; struct buf *bp; int sectorsize; int error, i; struct hfsmount *hfsmp; struct HFSPlusVolumeHeader *vhp; ExtendedVCB *vcb; struct filefork *forkp; struct cat_desc cndesc; struct hfs_reload_cargs args; hfsmp = VFSTOHFS(mountp); vcb = HFSTOVCB(hfsmp); if (vcb->vcbSigWord == kHFSSigWord) return (EINVAL); /* rooting from HFS is not supported! */ /* * Invalidate all cached meta-data. */ devvp = hfsmp->hfs_devvp; if (buf_invalidateblks(devvp, 0, 0, 0)) panic("hfs_reload: dirty1"); args.hfsmp = hfsmp; args.cred = cred; args.p = p; args.error = 0; /* * hfs_reload_callback will be called for each vnode * hung off of this mount point that can't be recycled... * vnode_iterate will recycle those that it can (the VNODE_RELOAD option) * the vnode will be in an 'unbusy' state (VNODE_WAIT) and * properly referenced and unreferenced around the callback */ vnode_iterate(mountp, VNODE_RELOAD | VNODE_WAIT, hfs_reload_callback, (void *)&args); if (args.error) return (args.error); /* * Re-read VolumeHeader from disk. */ sectorsize = hfsmp->hfs_phys_block_size; error = (int)buf_meta_bread(hfsmp->hfs_devvp, (daddr64_t)((vcb->hfsPlusIOPosOffset / sectorsize) + HFS_PRI_SECTOR(sectorsize)), sectorsize, NOCRED, &bp); if (error) { if (bp != NULL) buf_brelse(bp); return (error); } vhp = (HFSPlusVolumeHeader *) (buf_dataptr(bp) + HFS_PRI_OFFSET(sectorsize)); /* Do a quick sanity check */ if ((SWAP_BE16(vhp->signature) != kHFSPlusSigWord && SWAP_BE16(vhp->signature) != kHFSXSigWord) || (SWAP_BE16(vhp->version) != kHFSPlusVersion && SWAP_BE16(vhp->version) != kHFSXVersion) || SWAP_BE32(vhp->blockSize) != vcb->blockSize) { buf_brelse(bp); return (EIO); } vcb->vcbLsMod = to_bsd_time(SWAP_BE32(vhp->modifyDate)); vcb->vcbAtrb = SWAP_BE32 (vhp->attributes); vcb->vcbJinfoBlock = SWAP_BE32(vhp->journalInfoBlock); vcb->vcbClpSiz = SWAP_BE32 (vhp->rsrcClumpSize); vcb->vcbNxtCNID = SWAP_BE32 (vhp->nextCatalogID); vcb->vcbVolBkUp = to_bsd_time(SWAP_BE32(vhp->backupDate)); vcb->vcbWrCnt = SWAP_BE32 (vhp->writeCount); vcb->vcbFilCnt = SWAP_BE32 (vhp->fileCount); vcb->vcbDirCnt = SWAP_BE32 (vhp->folderCount); vcb->nextAllocation = SWAP_BE32 (vhp->nextAllocation); vcb->totalBlocks = SWAP_BE32 (vhp->totalBlocks); vcb->freeBlocks = SWAP_BE32 (vhp->freeBlocks); vcb->encodingsBitmap = SWAP_BE64 (vhp->encodingsBitmap); bcopy(vhp->finderInfo, vcb->vcbFndrInfo, sizeof(vhp->finderInfo)); vcb->localCreateDate = SWAP_BE32 (vhp->createDate); /* hfs+ create date is in local time */ /* * Re-load meta-file vnode data (extent info, file size, etc). */ forkp = VTOF((struct vnode *)vcb->extentsRefNum); for (i = 0; i < kHFSPlusExtentDensity; i++) { forkp->ff_extents[i].startBlock = SWAP_BE32 (vhp->extentsFile.extents[i].startBlock); forkp->ff_extents[i].blockCount = SWAP_BE32 (vhp->extentsFile.extents[i].blockCount); } forkp->ff_size = SWAP_BE64 (vhp->extentsFile.logicalSize); forkp->ff_blocks = SWAP_BE32 (vhp->extentsFile.totalBlocks); forkp->ff_clumpsize = SWAP_BE32 (vhp->extentsFile.clumpSize); forkp = VTOF((struct vnode *)vcb->catalogRefNum); for (i = 0; i < kHFSPlusExtentDensity; i++) { forkp->ff_extents[i].startBlock = SWAP_BE32 (vhp->catalogFile.extents[i].startBlock); forkp->ff_extents[i].blockCount = SWAP_BE32 (vhp->catalogFile.extents[i].blockCount); } forkp->ff_size = SWAP_BE64 (vhp->catalogFile.logicalSize); forkp->ff_blocks = SWAP_BE32 (vhp->catalogFile.totalBlocks); forkp->ff_clumpsize = SWAP_BE32 (vhp->catalogFile.clumpSize); if (hfsmp->hfs_attribute_vp) { forkp = VTOF(hfsmp->hfs_attribute_vp); for (i = 0; i < kHFSPlusExtentDensity; i++) { forkp->ff_extents[i].startBlock = SWAP_BE32 (vhp->attributesFile.extents[i].startBlock); forkp->ff_extents[i].blockCount = SWAP_BE32 (vhp->attributesFile.extents[i].blockCount); } forkp->ff_size = SWAP_BE64 (vhp->attributesFile.logicalSize); forkp->ff_blocks = SWAP_BE32 (vhp->attributesFile.totalBlocks); forkp->ff_clumpsize = SWAP_BE32 (vhp->attributesFile.clumpSize); } forkp = VTOF((struct vnode *)vcb->allocationsRefNum); for (i = 0; i < kHFSPlusExtentDensity; i++) { forkp->ff_extents[i].startBlock = SWAP_BE32 (vhp->allocationFile.extents[i].startBlock); forkp->ff_extents[i].blockCount = SWAP_BE32 (vhp->allocationFile.extents[i].blockCount); } forkp->ff_size = SWAP_BE64 (vhp->allocationFile.logicalSize); forkp->ff_blocks = SWAP_BE32 (vhp->allocationFile.totalBlocks); forkp->ff_clumpsize = SWAP_BE32 (vhp->allocationFile.clumpSize); buf_brelse(bp); vhp = NULL; /* * Re-load B-tree header data */ forkp = VTOF((struct vnode *)vcb->extentsRefNum); if ( (error = MacToVFSError( BTReloadData((FCB*)forkp) )) ) return (error); forkp = VTOF((struct vnode *)vcb->catalogRefNum); if ( (error = MacToVFSError( BTReloadData((FCB*)forkp) )) ) return (error); if (hfsmp->hfs_attribute_vp) { forkp = VTOF(hfsmp->hfs_attribute_vp); if ( (error = MacToVFSError( BTReloadData((FCB*)forkp) )) ) return (error); } /* Reload the volume name */ if ((error = cat_idlookup(hfsmp, kHFSRootFolderID, &cndesc, NULL, NULL))) return (error); vcb->volumeNameEncodingHint = cndesc.cd_encoding; bcopy(cndesc.cd_nameptr, vcb->vcbVN, min(255, cndesc.cd_namelen)); cat_releasedesc(&cndesc); /* Re-establish private/hidden directory for unlinked files */ FindMetaDataDirectory(vcb); /* In case any volume information changed to trigger a notification */ hfs_generate_volume_notifications(hfsmp); return (0); } /* * Common code for mount and mountroot */ static int hfs_mountfs(struct vnode *devvp, struct mount *mp, struct hfs_mount_args *args, vfs_context_t context) { struct proc *p = vfs_context_proc(context); int retval = E_NONE; struct hfsmount *hfsmp; struct buf *bp; dev_t dev; HFSMasterDirectoryBlock *mdbp; int ronly; int i; int mntwrapper; kauth_cred_t cred; u_int64_t disksize; daddr64_t blkcnt; u_int32_t blksize; u_int32_t minblksize; u_int32_t iswritable; daddr64_t mdb_offset; ronly = vfs_isrdonly(mp); dev = vnode_specrdev(devvp); cred = p ? vfs_context_ucred(context) : NOCRED; mntwrapper = 0; bp = NULL; hfsmp = NULL; mdbp = NULL; minblksize = kHFSBlockSize; /* Advisory locking should be handled at the VFS layer */ vfs_setlocklocal(mp); /* Get the real physical block size. */ if (VNOP_IOCTL(devvp, DKIOCGETBLOCKSIZE, (caddr_t)&blksize, 0, context)) { retval = ENXIO; goto error_exit; } /* Switch to 512 byte sectors (temporarily) */ if (blksize > 512) { u_int32_t size512 = 512; if (VNOP_IOCTL(devvp, DKIOCSETBLOCKSIZE, (caddr_t)&size512, FWRITE, context)) { retval = ENXIO; goto error_exit; } } /* Get the number of 512 byte physical blocks. */ if (VNOP_IOCTL(devvp, DKIOCGETBLOCKCOUNT, (caddr_t)&blkcnt, 0, context)) { retval = ENXIO; goto error_exit; } /* Compute an accurate disk size (i.e. within 512 bytes) */ disksize = (u_int64_t)blkcnt * (u_int64_t)512; /* * On Tiger it is not necessary to switch the device * block size to be 4k if there are more than 31-bits * worth of blocks but to insure compatibility with * pre-Tiger systems we have to do it. */ if (blkcnt > (u_int64_t)0x000000007fffffff) { minblksize = blksize = 4096; } /* Now switch to our prefered physical block size. */ if (blksize > 512) { if (VNOP_IOCTL(devvp, DKIOCSETBLOCKSIZE, (caddr_t)&blksize, FWRITE, context)) { retval = ENXIO; goto error_exit; } /* Get the count of physical blocks. */ if (VNOP_IOCTL(devvp, DKIOCGETBLOCKCOUNT, (caddr_t)&blkcnt, 0, context)) { retval = ENXIO; goto error_exit; } } /* * At this point: * minblksize is the minimum physical block size * blksize has our prefered physical block size * blkcnt has the total number of physical blocks */ mdb_offset = (daddr64_t)HFS_PRI_SECTOR(blksize); if ((retval = (int)buf_meta_bread(devvp, mdb_offset, blksize, cred, &bp))) { goto error_exit; } MALLOC(mdbp, HFSMasterDirectoryBlock *, kMDBSize, M_TEMP, M_WAITOK); bcopy((char *)buf_dataptr(bp) + HFS_PRI_OFFSET(blksize), mdbp, kMDBSize); buf_brelse(bp); bp = NULL; MALLOC(hfsmp, struct hfsmount *, sizeof(struct hfsmount), M_HFSMNT, M_WAITOK); bzero(hfsmp, sizeof(struct hfsmount)); /* * Init the volume information structure */ lck_mtx_init(&hfsmp->hfs_mutex, hfs_mutex_group, hfs_lock_attr); lck_mtx_init(&hfsmp->hfc_mutex, hfs_mutex_group, hfs_lock_attr); lck_rw_init(&hfsmp->hfs_global_lock, hfs_rwlock_group, hfs_lock_attr); lck_rw_init(&hfsmp->hfs_insync, hfs_rwlock_group, hfs_lock_attr); vfs_setfsprivate(mp, hfsmp); hfsmp->hfs_mp = mp; /* Make VFSTOHFS work */ hfsmp->hfs_raw_dev = vnode_specrdev(devvp); hfsmp->hfs_devvp = devvp; hfsmp->hfs_phys_block_size = blksize; hfsmp->hfs_phys_block_count = blkcnt; hfsmp->hfs_flags |= HFS_WRITEABLE_MEDIA; if (ronly) hfsmp->hfs_flags |= HFS_READ_ONLY; if (((unsigned int)vfs_flags(mp)) & MNT_UNKNOWNPERMISSIONS) hfsmp->hfs_flags |= HFS_UNKNOWN_PERMS; for (i = 0; i < MAXQUOTAS; i++) dqfileinit(&hfsmp->hfs_qfiles[i]); if (args) { hfsmp->hfs_uid = (args->hfs_uid == (uid_t)VNOVAL) ? UNKNOWNUID : args->hfs_uid; if (hfsmp->hfs_uid == 0xfffffffd) hfsmp->hfs_uid = UNKNOWNUID; hfsmp->hfs_gid = (args->hfs_gid == (gid_t)VNOVAL) ? UNKNOWNGID : args->hfs_gid; if (hfsmp->hfs_gid == 0xfffffffd) hfsmp->hfs_gid = UNKNOWNGID; vfs_setowner(mp, hfsmp->hfs_uid, hfsmp->hfs_gid); /* tell the VFS */ if (args->hfs_mask != (mode_t)VNOVAL) { hfsmp->hfs_dir_mask = args->hfs_mask & ALLPERMS; if (args->flags & HFSFSMNT_NOXONFILES) { hfsmp->hfs_file_mask = (args->hfs_mask & DEFFILEMODE); } else { hfsmp->hfs_file_mask = args->hfs_mask & ALLPERMS; } } else { hfsmp->hfs_dir_mask = UNKNOWNPERMISSIONS & ALLPERMS; /* 0777: rwx---rwx */ hfsmp->hfs_file_mask = UNKNOWNPERMISSIONS & DEFFILEMODE; /* 0666: no --x by default? */ } if ((args->flags != (int)VNOVAL) && (args->flags & HFSFSMNT_WRAPPER)) mntwrapper = 1; } else { /* Even w/o explicit mount arguments, MNT_UNKNOWNPERMISSIONS requires setting up uid, gid, and mask: */ if (((unsigned int)vfs_flags(mp)) & MNT_UNKNOWNPERMISSIONS) { hfsmp->hfs_uid = UNKNOWNUID; hfsmp->hfs_gid = UNKNOWNGID; vfs_setowner(mp, hfsmp->hfs_uid, hfsmp->hfs_gid); /* tell the VFS */ hfsmp->hfs_dir_mask = UNKNOWNPERMISSIONS & ALLPERMS; /* 0777: rwx---rwx */ hfsmp->hfs_file_mask = UNKNOWNPERMISSIONS & DEFFILEMODE; /* 0666: no --x by default? */ } } /* Find out if disk media is writable. */ if (VNOP_IOCTL(devvp, DKIOCISWRITABLE, (caddr_t)&iswritable, 0, context) == 0) { if (iswritable) hfsmp->hfs_flags |= HFS_WRITEABLE_MEDIA; else hfsmp->hfs_flags &= ~HFS_WRITEABLE_MEDIA; } // record the current time at which we're mounting this volume { struct timeval tv; microtime(&tv); hfsmp->hfs_mount_time = tv.tv_sec; } /* Mount a standard HFS disk */ if ((SWAP_BE16(mdbp->drSigWord) == kHFSSigWord) && (mntwrapper || (SWAP_BE16(mdbp->drEmbedSigWord) != kHFSPlusSigWord))) { if ((vfs_flags(mp) & MNT_ROOTFS)) { retval = EINVAL; /* Cannot root from HFS standard disks */ goto error_exit; } /* HFS disks can only use 512 byte physical blocks */ if (blksize > kHFSBlockSize) { blksize = kHFSBlockSize; if (VNOP_IOCTL(devvp, DKIOCSETBLOCKSIZE, (caddr_t)&blksize, FWRITE, context)) { retval = ENXIO; goto error_exit; } if (VNOP_IOCTL(devvp, DKIOCGETBLOCKCOUNT, (caddr_t)&blkcnt, 0, context)) { retval = ENXIO; goto error_exit; } hfsmp->hfs_phys_block_size = blksize; hfsmp->hfs_phys_block_count = blkcnt; } if (args) { hfsmp->hfs_encoding = args->hfs_encoding; HFSTOVCB(hfsmp)->volumeNameEncodingHint = args->hfs_encoding; /* establish the timezone */ gTimeZone = args->hfs_timezone; } retval = hfs_getconverter(hfsmp->hfs_encoding, &hfsmp->hfs_get_unicode, &hfsmp->hfs_get_hfsname); if (retval) goto error_exit; retval = hfs_MountHFSVolume(hfsmp, mdbp, p); if (retval) (void) hfs_relconverter(hfsmp->hfs_encoding); } else /* Mount an HFS Plus disk */ { HFSPlusVolumeHeader *vhp; off_t embeddedOffset; int jnl_disable = 0; /* Get the embedded Volume Header */ if (SWAP_BE16(mdbp->drEmbedSigWord) == kHFSPlusSigWord) { embeddedOffset = SWAP_BE16(mdbp->drAlBlSt) * kHFSBlockSize; embeddedOffset += (u_int64_t)SWAP_BE16(mdbp->drEmbedExtent.startBlock) * (u_int64_t)SWAP_BE32(mdbp->drAlBlkSiz); /* * If the embedded volume doesn't start on a block * boundary, then switch the device to a 512-byte * block size so everything will line up on a block * boundary. */ if ((embeddedOffset % blksize) != 0) { printf("HFS Mount: embedded volume offset not" " a multiple of physical block size (%d);" " switching to 512\n", blksize); blksize = 512; if (VNOP_IOCTL(devvp, DKIOCSETBLOCKSIZE, (caddr_t)&blksize, FWRITE, context)) { retval = ENXIO; goto error_exit; } if (VNOP_IOCTL(devvp, DKIOCGETBLOCKCOUNT, (caddr_t)&blkcnt, 0, context)) { retval = ENXIO; goto error_exit; } /* Note: relative block count adjustment */ hfsmp->hfs_phys_block_count *= hfsmp->hfs_phys_block_size / blksize; hfsmp->hfs_phys_block_size = blksize; } disksize = (u_int64_t)SWAP_BE16(mdbp->drEmbedExtent.blockCount) * (u_int64_t)SWAP_BE32(mdbp->drAlBlkSiz); hfsmp->hfs_phys_block_count = disksize / blksize; mdb_offset = (daddr64_t)((embeddedOffset / blksize) + HFS_PRI_SECTOR(blksize)); retval = (int)buf_meta_bread(devvp, mdb_offset, blksize, cred, &bp); if (retval) goto error_exit; bcopy((char *)buf_dataptr(bp) + HFS_PRI_OFFSET(blksize), mdbp, 512); buf_brelse(bp); bp = NULL; vhp = (HFSPlusVolumeHeader*) mdbp; } else /* pure HFS+ */ { embeddedOffset = 0; vhp = (HFSPlusVolumeHeader*) mdbp; } // XXXdbg // hfsmp->jnl = NULL; hfsmp->jvp = NULL; if (args != NULL && (args->flags & HFSFSMNT_EXTENDED_ARGS) && args->journal_disable) { jnl_disable = 1; } // // We only initialize the journal here if the last person // to mount this volume was journaling aware. Otherwise // we delay journal initialization until later at the end // of hfs_MountHFSPlusVolume() because the last person who // mounted it could have messed things up behind our back // (so we need to go find the .journal file, make sure it's // the right size, re-sync up if it was moved, etc). // if ( (SWAP_BE32(vhp->lastMountedVersion) == kHFSJMountVersion) && (SWAP_BE32(vhp->attributes) & kHFSVolumeJournaledMask) && !jnl_disable) { // if we're able to init the journal, mark the mount // point as journaled. // if (hfs_early_journal_init(hfsmp, vhp, args, embeddedOffset, mdb_offset, mdbp, cred) == 0) { vfs_setflags(mp, (uint64_t)((unsigned int)MNT_JOURNALED)); } else { // if the journal failed to open, then set the lastMountedVersion // to be "FSK!" which fsck_hfs will see and force the fsck instead // of just bailing out because the volume is journaled. if (!ronly) { HFSPlusVolumeHeader *jvhp; hfsmp->hfs_flags |= HFS_NEED_JNL_RESET; if (mdb_offset == 0) { mdb_offset = (daddr64_t)((embeddedOffset / blksize) + HFS_PRI_SECTOR(blksize)); } bp = NULL; retval = (int)buf_meta_bread(devvp, mdb_offset, blksize, cred, &bp); if (retval == 0) { jvhp = (HFSPlusVolumeHeader *)(buf_dataptr(bp) + HFS_PRI_OFFSET(blksize)); if (SWAP_BE16(jvhp->signature) == kHFSPlusSigWord || SWAP_BE16(jvhp->signature) == kHFSXSigWord) { printf ("hfs(1): Journal replay fail. Writing lastMountVersion as FSK!\n"); jvhp->lastMountedVersion = SWAP_BE32(kFSKMountVersion); buf_bwrite(bp); } else { buf_brelse(bp); } bp = NULL; } else if (bp) { buf_brelse(bp); // clear this so the error exit path won't try to use it bp = NULL; } } // if this isn't the root device just bail out. // If it is the root device we just continue on // in the hopes that fsck_hfs will be able to // fix any damage that exists on the volume. if ( !(vfs_flags(mp) & MNT_ROOTFS)) { retval = EINVAL; goto error_exit; } } } // XXXdbg (void) hfs_getconverter(0, &hfsmp->hfs_get_unicode, &hfsmp->hfs_get_hfsname); retval = hfs_MountHFSPlusVolume(hfsmp, vhp, embeddedOffset, disksize, p, args, cred); /* * If the backend didn't like our physical blocksize * then retry with physical blocksize of 512. */ if ((retval == ENXIO) && (blksize > 512) && (blksize != minblksize)) { printf("HFS Mount: could not use physical block size " "(%d) switching to 512\n", blksize); blksize = 512; if (VNOP_IOCTL(devvp, DKIOCSETBLOCKSIZE, (caddr_t)&blksize, FWRITE, context)) { retval = ENXIO; goto error_exit; } if (VNOP_IOCTL(devvp, DKIOCGETBLOCKCOUNT, (caddr_t)&blkcnt, 0, context)) { retval = ENXIO; goto error_exit; } devvp->v_specsize = blksize; /* Note: relative block count adjustment (in case this is an embedded volume). */ hfsmp->hfs_phys_block_count *= hfsmp->hfs_phys_block_size / blksize; hfsmp->hfs_phys_block_size = blksize; if (hfsmp->jnl) { // close and re-open this with the new block size journal_close(hfsmp->jnl); hfsmp->jnl = NULL; if (hfs_early_journal_init(hfsmp, vhp, args, embeddedOffset, mdb_offset, mdbp, cred) == 0) { vfs_setflags(mp, (uint64_t)((unsigned int)MNT_JOURNALED)); } else { // if the journal failed to open, then set the lastMountedVersion // to be "FSK!" which fsck_hfs will see and force the fsck instead // of just bailing out because the volume is journaled. if (!ronly) { HFSPlusVolumeHeader *jvhp; hfsmp->hfs_flags |= HFS_NEED_JNL_RESET; if (mdb_offset == 0) { mdb_offset = (daddr64_t)((embeddedOffset / blksize) + HFS_PRI_SECTOR(blksize)); } bp = NULL; retval = (int)buf_meta_bread(devvp, mdb_offset, blksize, cred, &bp); if (retval == 0) { jvhp = (HFSPlusVolumeHeader *)(buf_dataptr(bp) + HFS_PRI_OFFSET(blksize)); if (SWAP_BE16(jvhp->signature) == kHFSPlusSigWord || SWAP_BE16(jvhp->signature) == kHFSXSigWord) { printf ("hfs(2): Journal replay fail. Writing lastMountVersion as FSK!\n"); jvhp->lastMountedVersion = SWAP_BE32(kFSKMountVersion); buf_bwrite(bp); } else { buf_brelse(bp); } bp = NULL; } else if (bp) { buf_brelse(bp); // clear this so the error exit path won't try to use it bp = NULL; } } // if this isn't the root device just bail out. // If it is the root device we just continue on // in the hopes that fsck_hfs will be able to // fix any damage that exists on the volume. if ( !(vfs_flags(mp) & MNT_ROOTFS)) { retval = EINVAL; goto error_exit; } } } /* Try again with a smaller block size... */ retval = hfs_MountHFSPlusVolume(hfsmp, vhp, embeddedOffset, disksize, p, args, cred); } if (retval) (void) hfs_relconverter(0); } // save off a snapshot of the mtime from the previous mount // (for matador). hfsmp->hfs_last_mounted_mtime = hfsmp->hfs_mtime; if ( retval ) { goto error_exit; } mp->mnt_vfsstat.f_fsid.val[0] = (long)dev; mp->mnt_vfsstat.f_fsid.val[1] = vfs_typenum(mp); vfs_setmaxsymlen(mp, 0); mp->mnt_vtable->vfc_threadsafe = TRUE; mp->mnt_vtable->vfc_vfsflags |= VFC_VFSNATIVEXATTR; if (args) { /* * Set the free space warning levels for a non-root volume: * * Set the lower freespace limit (the level that will trigger a warning) * to 5% of the volume size or 250MB, whichever is less, and the desired * level (which will cancel the alert request) to 1/2 above that limit. * Start looking for free space to drop below this level and generate a * warning immediately if needed: */ hfsmp->hfs_freespace_notify_warninglimit = MIN(HFS_LOWDISKTRIGGERLEVEL / HFSTOVCB(hfsmp)->blockSize, (HFSTOVCB(hfsmp)->totalBlocks / 100) * HFS_LOWDISKTRIGGERFRACTION); hfsmp->hfs_freespace_notify_desiredlevel = MIN(HFS_LOWDISKSHUTOFFLEVEL / HFSTOVCB(hfsmp)->blockSize, (HFSTOVCB(hfsmp)->totalBlocks / 100) * HFS_LOWDISKSHUTOFFFRACTION); } else { /* * Set the free space warning levels for the root volume: * * Set the lower freespace limit (the level that will trigger a warning) * to 1% of the volume size or 50MB, whichever is less, and the desired * level (which will cancel the alert request) to 2% or 75MB, whichever is less. */ hfsmp->hfs_freespace_notify_warninglimit = MIN(HFS_ROOTLOWDISKTRIGGERLEVEL / HFSTOVCB(hfsmp)->blockSize, (HFSTOVCB(hfsmp)->totalBlocks / 100) * HFS_ROOTLOWDISKTRIGGERFRACTION); hfsmp->hfs_freespace_notify_desiredlevel = MIN(HFS_ROOTLOWDISKSHUTOFFLEVEL / HFSTOVCB(hfsmp)->blockSize, (HFSTOVCB(hfsmp)->totalBlocks / 100) * HFS_ROOTLOWDISKSHUTOFFFRACTION); }; /* * Start looking for free space to drop below this level and generate a * warning immediately if needed: */ hfsmp->hfs_notification_conditions = 0; hfs_generate_volume_notifications(hfsmp); if (ronly == 0) { (void) hfs_flushvolumeheader(hfsmp, MNT_WAIT, 0); } FREE(mdbp, M_TEMP); return (0); error_exit: if (bp) buf_brelse(bp); if (mdbp) FREE(mdbp, M_TEMP); if (hfsmp && hfsmp->jvp && hfsmp->jvp != hfsmp->hfs_devvp) { (void)VNOP_CLOSE(hfsmp->jvp, ronly ? FREAD : FREAD|FWRITE, context); hfsmp->jvp = NULL; } if (hfsmp) { FREE(hfsmp, M_HFSMNT); vfs_setfsprivate(mp, NULL); } return (retval); } /* * Make a filesystem operational. * Nothing to do at the moment. */ /* ARGSUSED */ static int hfs_start(__unused struct mount *mp, __unused int flags, __unused vfs_context_t context) { return (0); } /* * unmount system call */ static int hfs_unmount(struct mount *mp, int mntflags, vfs_context_t context) { struct proc *p = vfs_context_proc(context); struct hfsmount *hfsmp = VFSTOHFS(mp); int retval = E_NONE; int flags; int force; int started_tr = 0; flags = 0; force = 0; if (mntflags & MNT_FORCE) { flags |= FORCECLOSE; force = 1; } if ((retval = hfs_flushfiles(mp, flags, p)) && !force) return (retval); if (hfsmp->hfs_flags & HFS_METADATA_ZONE) (void) hfs_recording_suspend(hfsmp); /* * Flush out the b-trees, volume bitmap and Volume Header */ if ((hfsmp->hfs_flags & HFS_READ_ONLY) == 0) { hfs_start_transaction(hfsmp); started_tr = 1; if (hfsmp->hfs_attribute_vp) { (void) hfs_lock(VTOC(hfsmp->hfs_attribute_vp), HFS_EXCLUSIVE_LOCK); retval = hfs_fsync(hfsmp->hfs_attribute_vp, MNT_WAIT, 0, p); hfs_unlock(VTOC(hfsmp->hfs_attribute_vp)); if (retval && !force) goto err_exit; } (void) hfs_lock(VTOC(hfsmp->hfs_catalog_vp), HFS_EXCLUSIVE_LOCK); retval = hfs_fsync(hfsmp->hfs_catalog_vp, MNT_WAIT, 0, p); hfs_unlock(VTOC(hfsmp->hfs_catalog_vp)); if (retval && !force) goto err_exit; (void) hfs_lock(VTOC(hfsmp->hfs_extents_vp), HFS_EXCLUSIVE_LOCK); retval = hfs_fsync(hfsmp->hfs_extents_vp, MNT_WAIT, 0, p); hfs_unlock(VTOC(hfsmp->hfs_extents_vp)); if (retval && !force) goto err_exit; if (hfsmp->hfs_allocation_vp) { (void) hfs_lock(VTOC(hfsmp->hfs_allocation_vp), HFS_EXCLUSIVE_LOCK); retval = hfs_fsync(hfsmp->hfs_allocation_vp, MNT_WAIT, 0, p); hfs_unlock(VTOC(hfsmp->hfs_allocation_vp)); if (retval && !force) goto err_exit; } if (hfsmp->hfc_filevp && vnode_issystem(hfsmp->hfc_filevp)) { retval = hfs_fsync(hfsmp->hfc_filevp, MNT_WAIT, 0, p); if (retval && !force) goto err_exit; } #if 0 /* See if this volume is damaged, is so do not unmount cleanly */ if (HFSTOVCB(hfsmp)->vcbFlags & kHFS_DamagedVolume) { HFSTOVCB(hfsmp)->vcbAtrb &= ~kHFSVolumeUnmountedMask; } else { HFSTOVCB(hfsmp)->vcbAtrb |= kHFSVolumeUnmountedMask; } #else HFSTOVCB(hfsmp)->vcbAtrb |= kHFSVolumeUnmountedMask; #endif retval = hfs_flushvolumeheader(hfsmp, MNT_WAIT, 0); if (retval) { HFSTOVCB(hfsmp)->vcbAtrb &= ~kHFSVolumeUnmountedMask; if (!force) goto err_exit; /* could not flush everything */ } hfs_end_transaction(hfsmp); started_tr = 0; } if (hfsmp->jnl) { journal_flush(hfsmp->jnl); } /* * Invalidate our caches and release metadata vnodes */ (void) hfsUnmount(hfsmp, p); /* * Last chance to dump unreferenced system files. */ (void) vflush(mp, NULLVP, FORCECLOSE); if (HFSTOVCB(hfsmp)->vcbSigWord == kHFSSigWord) (void) hfs_relconverter(hfsmp->hfs_encoding); // XXXdbg if (hfsmp->jnl) { journal_close(hfsmp->jnl); hfsmp->jnl = NULL; } VNOP_FSYNC(hfsmp->hfs_devvp, MNT_WAIT, context); if (hfsmp->jvp && hfsmp->jvp != hfsmp->hfs_devvp) { retval = VNOP_CLOSE(hfsmp->jvp, hfsmp->hfs_flags & HFS_READ_ONLY ? FREAD : FREAD|FWRITE, context); vnode_put(hfsmp->jvp); hfsmp->jvp = NULL; } // XXXdbg #ifdef HFS_SPARSE_DEV /* Drop our reference on the backing fs (if any). */ if ((hfsmp->hfs_flags & HFS_HAS_SPARSE_DEVICE) && hfsmp->hfs_backingfs_rootvp) { struct vnode * tmpvp; hfsmp->hfs_flags &= ~HFS_HAS_SPARSE_DEVICE; tmpvp = hfsmp->hfs_backingfs_rootvp; hfsmp->hfs_backingfs_rootvp = NULLVP; vnode_rele(tmpvp); } #endif /* HFS_SPARSE_DEV */ lck_mtx_destroy(&hfsmp->hfc_mutex, hfs_mutex_group); FREE(hfsmp, M_HFSMNT); return (0); err_exit: if (started_tr) { hfs_end_transaction(hfsmp); } return retval; } /* * Return the root of a filesystem. */ static int hfs_vfs_root(struct mount *mp, struct vnode **vpp, __unused vfs_context_t context) { return hfs_vget(VFSTOHFS(mp), (cnid_t)kHFSRootFolderID, vpp, 1); } /* * Do operations associated with quotas */ static int hfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t datap, vfs_context_t context) { struct proc *p = vfs_context_proc(context); int cmd, type, error; #if !QUOTA return (ENOTSUP); #else if (uid == -1) uid = vfs_context_ucred(context)->cr_ruid; cmd = cmds >> SUBCMDSHIFT; switch (cmd) { case Q_SYNC: case Q_QUOTASTAT: break; case Q_GETQUOTA: if (uid == vfs_context_ucred(context)->cr_ruid) break; /* fall through */ default: if ( (error = vfs_context_suser(context)) ) return (error); } type = cmds & SUBCMDMASK; if ((u_int)type >= MAXQUOTAS) return (EINVAL); if (vfs_busy(mp, LK_NOWAIT)) return (0); switch (cmd) { case Q_QUOTAON: error = hfs_quotaon(p, mp, type, datap); break; case Q_QUOTAOFF: error = hfs_quotaoff(p, mp, type); break; case Q_SETQUOTA: error = hfs_setquota(mp, uid, type, datap); break; case Q_SETUSE: error = hfs_setuse(mp, uid, type, datap); break; case Q_GETQUOTA: error = hfs_getquota(mp, uid, type, datap); break; case Q_SYNC: error = hfs_qsync(mp); break; case Q_QUOTASTAT: error = hfs_quotastat(mp, type, datap); break; default: error = EINVAL; break; } vfs_unbusy(mp); return (error); #endif /* QUOTA */ } /* Subtype is composite of bits */ #define HFS_SUBTYPE_JOURNALED 0x01 #define HFS_SUBTYPE_CASESENSITIVE 0x02 /* bits 2 - 6 reserved */ #define HFS_SUBTYPE_STANDARDHFS 0x80 /* * Get file system statistics. */ static int hfs_statfs(struct mount *mp, register struct vfsstatfs *sbp, __unused vfs_context_t context) { ExtendedVCB *vcb = VFSTOVCB(mp); struct hfsmount *hfsmp = VFSTOHFS(mp); u_long freeCNIDs; uint16_t subtype = 0; freeCNIDs = (u_long)0xFFFFFFFF - (u_long)vcb->vcbNxtCNID; sbp->f_bsize = (uint32_t)vcb->blockSize; sbp->f_iosize = (size_t)(MAX_UPL_TRANSFER * PAGE_SIZE); sbp->f_blocks = (uint64_t)((unsigned long)vcb->totalBlocks); sbp->f_bfree = (uint64_t)((unsigned long )hfs_freeblks(hfsmp, 0)); sbp->f_bavail = (uint64_t)((unsigned long )hfs_freeblks(hfsmp, 1)); sbp->f_files = (uint64_t)((unsigned long )(vcb->totalBlocks - 2)); /* max files is constrained by total blocks */ sbp->f_ffree = (uint64_t)((unsigned long )(MIN(freeCNIDs, sbp->f_bavail))); /* * Subtypes (flavors) for HFS * 0: Mac OS Extended * 1: Mac OS Extended (Journaled) * 2: Mac OS Extended (Case Sensitive) * 3: Mac OS Extended (Case Sensitive, Journaled) * 4 - 127: Reserved * 128: Mac OS Standard * */ if (hfsmp->hfs_flags & HFS_STANDARD) { subtype = HFS_SUBTYPE_STANDARDHFS; } else /* HFS Plus */ { if (hfsmp->jnl) subtype |= HFS_SUBTYPE_JOURNALED; if (hfsmp->hfs_flags & HFS_CASE_SENSITIVE) subtype |= HFS_SUBTYPE_CASESENSITIVE; } sbp->f_fssubtype = subtype; return (0); } // // XXXdbg -- this is a callback to be used by the journal to // get meta data blocks flushed out to disk. // // XXXdbg -- be smarter and don't flush *every* block on each // call. try to only flush some so we don't wind up // being too synchronous. // __private_extern__ void hfs_sync_metadata(void *arg) { struct mount *mp = (struct mount *)arg; struct hfsmount *hfsmp; ExtendedVCB *vcb; buf_t bp; int sectorsize, retval; daddr64_t priIDSector; hfsmp = VFSTOHFS(mp); vcb = HFSTOVCB(hfsmp); // now make sure the super block is flushed sectorsize = hfsmp->hfs_phys_block_size; priIDSector = (daddr64_t)((vcb->hfsPlusIOPosOffset / sectorsize) + HFS_PRI_SECTOR(sectorsize)); retval = (int)buf_meta_bread(hfsmp->hfs_devvp, priIDSector, sectorsize, NOCRED, &bp); if (retval != 0) { panic("hfs: sync_metadata: can't read super-block?! (retval 0x%x, priIDSector)\n", retval, priIDSector); } if (retval == 0 && ((buf_flags(bp) & (B_DELWRI | B_LOCKED)) == B_DELWRI)) { buf_bwrite(bp); } else if (bp) { buf_brelse(bp); } // the alternate super block... // XXXdbg - we probably don't need to do this each and every time. // hfs_btreeio.c:FlushAlternate() should flag when it was // written... if (hfsmp->hfs_alt_id_sector) { retval = (int)buf_meta_bread(hfsmp->hfs_devvp, hfsmp->hfs_alt_id_sector, sectorsize, NOCRED, &bp); if (retval == 0 && ((buf_flags(bp) & (B_DELWRI | B_LOCKED)) == B_DELWRI)) { buf_bwrite(bp); } else if (bp) { buf_brelse(bp); } } } struct hfs_sync_cargs { kauth_cred_t cred; struct proc *p; int waitfor; int error; }; static int hfs_sync_callback(struct vnode *vp, void *cargs) { struct cnode *cp; struct hfs_sync_cargs *args; int error; args = (struct hfs_sync_cargs *)cargs; if (hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK) != 0) { return (VNODE_RETURNED); } cp = VTOC(vp); if ((cp->c_flag & C_MODIFIED) || (cp->c_touch_acctime | cp->c_touch_chgtime | cp->c_touch_modtime) || vnode_hasdirtyblks(vp)) { error = hfs_fsync(vp, args->waitfor, 0, args->p); if (error) args->error = error; } hfs_unlock(cp); return (VNODE_RETURNED); } /* * Go through the disk queues to initiate sandbagged IO; * go through the inodes to write those that have been modified; * initiate the writing of the super block if it has been modified. * * Note: we are always called with the filesystem marked `MPBUSY'. */ static int hfs_sync(struct mount *mp, int waitfor, vfs_context_t context) { struct proc *p = vfs_context_proc(context); struct cnode *cp; struct hfsmount *hfsmp; ExtendedVCB *vcb; struct vnode *meta_vp[4]; int i; int error, allerror = 0; struct hfs_sync_cargs args; /* * During MNT_UPDATE hfs_changefs might be manipulating * vnodes so back off */ if (((uint32_t)vfs_flags(mp)) & MNT_UPDATE) /* XXX MNT_UPDATE may not be visible here */ return (0); hfsmp = VFSTOHFS(mp); if (hfsmp->hfs_flags & HFS_READ_ONLY) return (EROFS); /* skip over frozen volumes */ if (!lck_rw_try_lock_shared(&hfsmp->hfs_insync)) return 0; args.cred = vfs_context_proc(context); args.waitfor = waitfor; args.p = p; args.error = 0; /* * hfs_sync_callback will be called for each vnode * hung off of this mount point... the vnode will be * properly referenced and unreferenced around the callback */ vnode_iterate(mp, 0, hfs_sync_callback, (void *)&args); if (args.error) allerror = args.error; vcb = HFSTOVCB(hfsmp); meta_vp[0] = vcb->extentsRefNum; meta_vp[1] = vcb->catalogRefNum; meta_vp[2] = vcb->allocationsRefNum; /* This is NULL for standard HFS */ meta_vp[3] = hfsmp->hfs_attribute_vp; /* Optional file */ /* Now sync our three metadata files */ for (i = 0; i < 4; ++i) { struct vnode *btvp; btvp = meta_vp[i];; if ((btvp==0) || (vnode_mount(btvp) != mp)) continue; /* XXX use hfs_systemfile_lock instead ? */ (void) hfs_lock(VTOC(btvp), HFS_EXCLUSIVE_LOCK); cp = VTOC(btvp); if (((cp->c_flag & C_MODIFIED) == 0) && (cp->c_touch_acctime == 0) && (cp->c_touch_chgtime == 0) && (cp->c_touch_modtime == 0) && vnode_hasdirtyblks(btvp) == 0) { hfs_unlock(VTOC(btvp)); continue; } error = vnode_get(btvp); if (error) { hfs_unlock(VTOC(btvp)); continue; } if ((error = hfs_fsync(btvp, waitfor, 0, p))) allerror = error; hfs_unlock(cp); vnode_put(btvp); }; /* * Force stale file system control information to be flushed. */ if (vcb->vcbSigWord == kHFSSigWord) { if ((error = VNOP_FSYNC(hfsmp->hfs_devvp, waitfor, context))) { allerror = error; } } #if QUOTA hfs_qsync(mp); #endif /* QUOTA */ hfs_hotfilesync(hfsmp, p); /* * Write back modified superblock. */ if (IsVCBDirty(vcb)) { error = hfs_flushvolumeheader(hfsmp, waitfor, 0); if (error) allerror = error; } if (hfsmp->jnl) { journal_flush(hfsmp->jnl); } lck_rw_unlock_shared(&hfsmp->hfs_insync); return (allerror); } /* * File handle to vnode * * Have to be really careful about stale file handles: * - check that the cnode id is valid * - call hfs_vget() to get the locked cnode * - check for an unallocated cnode (i_mode == 0) * - check that the given client host has export rights and return * those rights via. exflagsp and credanonp */ static int hfs_fhtovp(struct mount *mp, int fhlen, unsigned char *fhp, struct vnode **vpp, vfs_context_t context) { struct hfsfid *hfsfhp; struct vnode *nvp; int result; *vpp = NULL; hfsfhp = (struct hfsfid *)fhp; if (fhlen < sizeof(struct hfsfid)) return (EINVAL); result = hfs_vget(VFSTOHFS(mp), hfsfhp->hfsfid_cnid, &nvp, 0); if (result) { if (result == ENOENT) result = ESTALE; return result; } /* The createtime can be changed by hfs_setattr or hfs_setattrlist. * For NFS, we are assuming that only if the createtime was moved * forward would it mean the fileID got reused in that session by * wrapping. We don't have a volume ID or other unique identifier to * to use here for a generation ID across reboots, crashes where * metadata noting lastFileID didn't make it to disk but client has * it, or volume erasures where fileIDs start over again. Lastly, * with HFS allowing "wraps" of fileIDs now, this becomes more * error prone. Future, would be change the "wrap bit" to a unique * wrap number and use that for generation number. For now do this. */ if ((hfsfhp->hfsfid_gen < VTOC(nvp)->c_itime)) { hfs_unlock(VTOC(nvp)); vnode_put(nvp); return (ESTALE); } *vpp = nvp; hfs_unlock(VTOC(nvp)); return (0); } /* * Vnode pointer to File handle */ /* ARGSUSED */ static int hfs_vptofh(struct vnode *vp, int *fhlenp, unsigned char *fhp, vfs_context_t context) { struct cnode *cp; struct hfsfid *hfsfhp; if (ISHFS(VTOVCB(vp))) return (ENOTSUP); /* hfs standard is not exportable */ if (*fhlenp < (int)sizeof(struct hfsfid)) return (EOVERFLOW); cp = VTOC(vp); hfsfhp = (struct hfsfid *)fhp; hfsfhp->hfsfid_cnid = cp->c_fileid; hfsfhp->hfsfid_gen = cp->c_itime; *fhlenp = sizeof(struct hfsfid); return (0); } /* * Initial HFS filesystems, done only once. */ static int hfs_init(__unused struct vfsconf *vfsp) { static int done = 0; if (done) return (0); done = 1; hfs_chashinit(); hfs_converterinit(); #if QUOTA dqinit(); #endif /* QUOTA */ BTReserveSetup(); hfs_lock_attr = lck_attr_alloc_init(); hfs_group_attr = lck_grp_attr_alloc_init(); hfs_mutex_group = lck_grp_alloc_init("hfs-mutex", hfs_group_attr); hfs_rwlock_group = lck_grp_alloc_init("hfs-rwlock", hfs_group_attr); /* Turn on lock debugging */ //lck_attr_setdebug(hfs_lock_attr); return (0); } static int hfs_getmountpoint(vp, hfsmpp) struct vnode *vp; struct hfsmount **hfsmpp; { struct hfsmount * hfsmp; char fstypename[MFSNAMELEN]; if (vp == NULL) return (EINVAL); if (!vnode_isvroot(vp)) return (EINVAL); vnode_vfsname(vp, fstypename); if (strcmp(fstypename, "hfs") != 0) return (EINVAL); hfsmp = VTOHFS(vp); if (HFSTOVCB(hfsmp)->vcbSigWord == kHFSSigWord) return (EINVAL); *hfsmpp = hfsmp; return (0); } // XXXdbg #include /* * HFS filesystem related variables. */ static int hfs_sysctl(int *name, __unused u_int namelen, user_addr_t oldp, size_t *oldlenp, user_addr_t newp, size_t newlen, vfs_context_t context) { struct proc *p = vfs_context_proc(context); int error; struct hfsmount *hfsmp; /* all sysctl names at this level are terminal */ if (name[0] == HFS_ENCODINGBIAS) { u_int32_t bias; bias = hfs_getencodingbias(); error = sysctl_int(oldp, oldlenp, newp, newlen, &bias); if (error == 0 && newp) hfs_setencodingbias(bias); return (error); } else if (name[0] == HFS_EXTEND_FS) { u_int64_t newsize; vnode_t vp = p->p_fd->fd_cdir; if (newp == USER_ADDR_NULL || vp == NULL) return (EINVAL); if ((error = hfs_getmountpoint(vp, &hfsmp))) return (error); error = sysctl_quad(oldp, oldlenp, newp, newlen, &newsize); if (error) return (error); error = hfs_extendfs(hfsmp, newsize, context); return (error); } else if (name[0] == HFS_ENCODINGHINT) { size_t bufsize; size_t bytes; u_int32_t hint; u_int16_t *unicode_name; char *filename; bufsize = MAX(newlen * 3, MAXPATHLEN); MALLOC(filename, char *, newlen, M_TEMP, M_WAITOK); MALLOC(unicode_name, u_int16_t *, bufsize, M_TEMP, M_WAITOK); error = copyin(newp, (caddr_t)filename, newlen); if (error == 0) { error = utf8_decodestr(filename, newlen - 1, unicode_name, &bytes, bufsize, 0, UTF_DECOMPOSED); if (error == 0) { hint = hfs_pickencoding(unicode_name, bytes / 2); error = sysctl_int(oldp, oldlenp, USER_ADDR_NULL, 0, &hint); } } FREE(unicode_name, M_TEMP); FREE(filename, M_TEMP); return (error); } else if (name[0] == HFS_ENABLE_JOURNALING) { // make the file system journaled... struct vnode *vp = p->p_fd->fd_cdir, *jvp; ExtendedVCB *vcb; struct cat_attr jnl_attr, jinfo_attr; struct cat_fork jnl_fork, jinfo_fork; void *jnl = NULL; int lockflags; /* Only root can enable journaling */ if (!is_suser()) { return (EPERM); } if (vp == NULL) return EINVAL; hfsmp = VTOHFS(vp); if (hfsmp->hfs_flags & HFS_READ_ONLY) { return EROFS; } if (HFSTOVCB(hfsmp)->vcbSigWord == kHFSSigWord) { printf("hfs: can't make a plain hfs volume journaled.\n"); return EINVAL; } if (hfsmp->jnl) { printf("hfs: volume @ mp 0x%x is already journaled!\n", vnode_mount(vp)); return EAGAIN; } vcb = HFSTOVCB(hfsmp); lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG | SFL_EXTENTS, HFS_EXCLUSIVE_LOCK); if (BTHasContiguousNodes(VTOF(vcb->catalogRefNum)) == 0 || BTHasContiguousNodes(VTOF(vcb->extentsRefNum)) == 0) { printf("hfs: volume has a btree w/non-contiguous nodes. can not enable journaling.\n"); hfs_systemfile_unlock(hfsmp, lockflags); return EINVAL; } hfs_systemfile_unlock(hfsmp, lockflags); // make sure these both exist! if ( GetFileInfo(vcb, kHFSRootFolderID, ".journal_info_block", &jinfo_attr, &jinfo_fork) == 0 || GetFileInfo(vcb, kHFSRootFolderID, ".journal", &jnl_attr, &jnl_fork) == 0) { return EINVAL; } hfs_sync(hfsmp->hfs_mp, MNT_WAIT, context); printf("hfs: Initializing the journal (joffset 0x%llx sz 0x%llx)...\n", (off_t)name[2], (off_t)name[3]); jvp = hfsmp->hfs_devvp; jnl = journal_create(jvp, (off_t)name[2] * (off_t)HFSTOVCB(hfsmp)->blockSize + HFSTOVCB(hfsmp)->hfsPlusIOPosOffset, (off_t)((unsigned)name[3]), hfsmp->hfs_devvp, hfsmp->hfs_phys_block_size, 0, 0, hfs_sync_metadata, hfsmp->hfs_mp); if (jnl == NULL) { printf("hfs: FAILED to create the journal!\n"); if (jvp && jvp != hfsmp->hfs_devvp) { VNOP_CLOSE(jvp, hfsmp->hfs_flags & HFS_READ_ONLY ? FREAD : FREAD|FWRITE, context); } jvp = NULL; return EINVAL; } hfs_global_exclusive_lock_acquire(hfsmp); HFSTOVCB(hfsmp)->vcbJinfoBlock = name[1]; HFSTOVCB(hfsmp)->vcbAtrb |= kHFSVolumeJournaledMask; hfsmp->jvp = jvp; hfsmp->jnl = jnl; // save this off for the hack-y check in hfs_remove() hfsmp->jnl_start = (u_int32_t)name[2]; hfsmp->jnl_size = (off_t)((unsigned)name[3]); hfsmp->hfs_jnlinfoblkid = jinfo_attr.ca_fileid; hfsmp->hfs_jnlfileid = jnl_attr.ca_fileid; vfs_setflags(hfsmp->hfs_mp, (uint64_t)((unsigned int)MNT_JOURNALED)); hfs_global_exclusive_lock_release(hfsmp); hfs_flushvolumeheader(hfsmp, MNT_WAIT, 1); return 0; } else if (name[0] == HFS_DISABLE_JOURNALING) { // clear the journaling bit struct vnode *vp = p->p_fd->fd_cdir; /* Only root can disable journaling */ if (!is_suser()) { return (EPERM); } if (vp == NULL) return EINVAL; hfsmp = VTOHFS(vp); printf("hfs: disabling journaling for mount @ 0x%x\n", vnode_mount(vp)); hfs_global_exclusive_lock_acquire(hfsmp); // Lights out for you buddy! journal_close(hfsmp->jnl); hfsmp->jnl = NULL; if (hfsmp->jvp && hfsmp->jvp != hfsmp->hfs_devvp) { VNOP_CLOSE(hfsmp->jvp, hfsmp->hfs_flags & HFS_READ_ONLY ? FREAD : FREAD|FWRITE, context); } hfsmp->jvp = NULL; vfs_clearflags(hfsmp->hfs_mp, (uint64_t)((unsigned int)MNT_JOURNALED)); hfsmp->jnl_start = 0; hfsmp->hfs_jnlinfoblkid = 0; hfsmp->hfs_jnlfileid = 0; HFSTOVCB(hfsmp)->vcbAtrb &= ~kHFSVolumeJournaledMask; hfs_global_exclusive_lock_release(hfsmp); hfs_flushvolumeheader(hfsmp, MNT_WAIT, 1); return 0; } else if (name[0] == HFS_GET_JOURNAL_INFO) { struct vnode *vp = p->p_fd->fd_cdir; off_t jnl_start, jnl_size; if (vp == NULL) return EINVAL; hfsmp = VTOHFS(vp); if (hfsmp->jnl == NULL) { jnl_start = 0; jnl_size = 0; } else { jnl_start = (off_t)(hfsmp->jnl_start * HFSTOVCB(hfsmp)->blockSize) + (off_t)HFSTOVCB(hfsmp)->hfsPlusIOPosOffset; jnl_size = (off_t)hfsmp->jnl_size; } if ((error = copyout((caddr_t)&jnl_start, CAST_USER_ADDR_T(name[1]), sizeof(off_t))) != 0) { return error; } if ((error = copyout((caddr_t)&jnl_size, CAST_USER_ADDR_T(name[2]), sizeof(off_t))) != 0) { return error; } return 0; } else if (name[0] == HFS_SET_PKG_EXTENSIONS) { return set_package_extensions_table((void *)name[1], name[2], name[3]); } else if (name[0] == VFS_CTL_QUERY) { struct sysctl_req *req; struct vfsidctl vc; struct user_vfsidctl user_vc; struct mount *mp; struct vfsquery vq; boolean_t is_64_bit; is_64_bit = proc_is64bit(p); req = CAST_DOWN(struct sysctl_req *, oldp); /* we're new style vfs sysctl. */ if (is_64_bit) { error = SYSCTL_IN(req, &user_vc, sizeof(user_vc)); if (error) return (error); mp = vfs_getvfs(&user_vc.vc_fsid); } else { error = SYSCTL_IN(req, &vc, sizeof(vc)); if (error) return (error); mp = vfs_getvfs(&vc.vc_fsid); } if (mp == NULL) return (ENOENT); hfsmp = VFSTOHFS(mp); bzero(&vq, sizeof(vq)); vq.vq_flags = hfsmp->hfs_notification_conditions; return SYSCTL_OUT(req, &vq, sizeof(vq));; }; return (ENOTSUP); } static int hfs_vfs_vget(struct mount *mp, ino64_t ino, struct vnode **vpp, __unused vfs_context_t context) { return hfs_vget(VFSTOHFS(mp), (cnid_t)ino, vpp, 1); } /* * Look up an HFS object by ID. * * The object is returned with an iocount reference and the cnode locked. * * If the object is a file then it will represent the data fork. */ __private_extern__ int hfs_vget(struct hfsmount *hfsmp, cnid_t cnid, struct vnode **vpp, int skiplock) { struct vnode *vp = NULL; struct cat_desc cndesc; struct cat_attr cnattr; struct cat_fork cnfork; struct componentname cn; u_int32_t linkref = 0; int error; /* Check for cnids that should't be exported. */ if ((cnid < kHFSFirstUserCatalogNodeID) && (cnid != kHFSRootFolderID && cnid != kHFSRootParentID)) return (ENOENT); /* Don't export HFS Private Data dir. */ if (cnid == hfsmp->hfs_privdir_desc.cd_cnid) return (ENOENT); /* * Check the hash first */ vp = hfs_chash_getvnode(hfsmp->hfs_raw_dev, cnid, 0, skiplock); if (vp) { *vpp = vp; return(0); } bzero(&cndesc, sizeof(cndesc)); bzero(&cnattr, sizeof(cnattr)); bzero(&cnfork, sizeof(cnfork)); /* * Not in hash, lookup in catalog */ if (cnid == kHFSRootParentID) { static char hfs_rootname[] = "/"; cndesc.cd_nameptr = &hfs_rootname[0]; cndesc.cd_namelen = 1; cndesc.cd_parentcnid = kHFSRootParentID; cndesc.cd_cnid = kHFSRootFolderID; cndesc.cd_flags = CD_ISDIR; cnattr.ca_fileid = kHFSRootFolderID; cnattr.ca_nlink = 2; cnattr.ca_entries = 1; cnattr.ca_mode = (S_IFDIR | S_IRWXU | S_IRWXG | S_IRWXO); } else { int lockflags; lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_SHARED_LOCK); error = cat_idlookup(hfsmp, cnid, &cndesc, &cnattr, &cnfork); hfs_systemfile_unlock(hfsmp, lockflags); if (error) { *vpp = NULL; return (error); } /* * If we just looked up a raw hardlink inode, * then finish initializing it. */ if ((cndesc.cd_parentcnid == hfsmp->hfs_privdir_desc.cd_cnid) && (bcmp(cndesc.cd_nameptr, HFS_INODE_PREFIX, HFS_INODE_PREFIX_LEN) == 0)) { linkref = strtoul((const char*)&cndesc.cd_nameptr[HFS_INODE_PREFIX_LEN], NULL, 10); cnattr.ca_rdev = linkref; // patch up the parentcnid if (cnattr.ca_attrblks != 0) { cndesc.cd_parentcnid = cnattr.ca_attrblks; } } } /* * Supply hfs_getnewvnode with a component name. */ MALLOC_ZONE(cn.cn_pnbuf, caddr_t, MAXPATHLEN, M_NAMEI, M_WAITOK); cn.cn_nameiop = LOOKUP; cn.cn_flags = ISLASTCN | HASBUF; cn.cn_context = NULL; cn.cn_pnlen = MAXPATHLEN; cn.cn_nameptr = cn.cn_pnbuf; cn.cn_namelen = cndesc.cd_namelen; cn.cn_hash = 0; cn.cn_consume = 0; bcopy(cndesc.cd_nameptr, cn.cn_nameptr, cndesc.cd_namelen + 1); /* XXX should we supply the parent as well... ? */ error = hfs_getnewvnode(hfsmp, NULLVP, &cn, &cndesc, 0, &cnattr, &cnfork, &vp); if (error == 0 && linkref != 0) { VTOC(vp)->c_flag |= C_HARDLINK; } FREE_ZONE(cn.cn_pnbuf, cn.cn_pnlen, M_NAMEI); cat_releasedesc(&cndesc); *vpp = vp; if (vp && skiplock) hfs_unlock(VTOC(vp)); return (error); } /* * Flush out all the files in a filesystem. */ static int hfs_flushfiles(struct mount *mp, int flags, struct proc *p) { struct hfsmount *hfsmp; struct vnode *skipvp = NULLVP; int quotafilecnt; int i; int error; hfsmp = VFSTOHFS(mp); #if QUOTA /* * The open quota files have an indirect reference on * the root directory vnode. We must account for this * extra reference when doing the intial vflush. */ quotafilecnt = 0; if (((unsigned int)vfs_flags(mp)) & MNT_QUOTA) { /* Find out how many quota files we have open. */ for (i = 0; i < MAXQUOTAS; i++) { if (hfsmp->hfs_qfiles[i].qf_vp != NULLVP) ++quotafilecnt; } /* Obtain the root vnode so we can skip over it. */ skipvp = hfs_chash_getvnode(hfsmp->hfs_raw_dev, kHFSRootFolderID, 0, 0); } #endif /* QUOTA */ error = vflush(mp, skipvp, SKIPSYSTEM | SKIPSWAP | flags); if (error != 0) return(error); error = vflush(mp, skipvp, SKIPSYSTEM | flags); #if QUOTA if (((unsigned int)vfs_flags(mp)) & MNT_QUOTA) { if (skipvp) { /* * See if there are additional references on the * root vp besides the ones obtained from the open * quota files and the hfs_chash_getvnode call above. */ if ((error == 0) && (vnode_isinuse(skipvp, quotafilecnt))) { error = EBUSY; /* root directory is still open */ } hfs_unlock(VTOC(skipvp)); vnode_put(skipvp); } if (error && (flags & FORCECLOSE) == 0) return (error); for (i = 0; i < MAXQUOTAS; i++) { if (hfsmp->hfs_qfiles[i].qf_vp == NULLVP) continue; hfs_quotaoff(p, mp, i); } error = vflush(mp, NULLVP, SKIPSYSTEM | flags); } #endif /* QUOTA */ return (error); } /* * Update volume encoding bitmap (HFS Plus only) */ __private_extern__ void hfs_setencodingbits(struct hfsmount *hfsmp, u_int32_t encoding) { #define kIndexMacUkrainian 48 /* MacUkrainian encoding is 152 */ #define kIndexMacFarsi 49 /* MacFarsi encoding is 140 */ UInt32 index; switch (encoding) { case kTextEncodingMacUkrainian: index = kIndexMacUkrainian; break; case kTextEncodingMacFarsi: index = kIndexMacFarsi; break; default: index = encoding; break; } if (index < 64) { HFS_MOUNT_LOCK(hfsmp, TRUE) hfsmp->encodingsBitmap |= (u_int64_t)(1ULL << index); hfsmp->vcbFlags |= 0xFF00; HFS_MOUNT_UNLOCK(hfsmp, TRUE); } } /* * Update volume stats * * On journal volumes this will cause a volume header flush */ __private_extern__ int hfs_volupdate(struct hfsmount *hfsmp, enum volop op, int inroot) { struct timeval tv; microtime(&tv); lck_mtx_lock(&hfsmp->hfs_mutex); hfsmp->vcbFlags |= 0xFF00; hfsmp->hfs_mtime = tv.tv_sec; switch (op) { case VOL_UPDATE: break; case VOL_MKDIR: if (hfsmp->hfs_dircount != 0xFFFFFFFF) ++hfsmp->hfs_dircount; if (inroot && hfsmp->vcbNmRtDirs != 0xFFFF) ++hfsmp->vcbNmRtDirs; break; case VOL_RMDIR: if (hfsmp->hfs_dircount != 0) --hfsmp->hfs_dircount; if (inroot && hfsmp->vcbNmRtDirs != 0xFFFF) --hfsmp->vcbNmRtDirs; break; case VOL_MKFILE: if (hfsmp->hfs_filecount != 0xFFFFFFFF) ++hfsmp->hfs_filecount; if (inroot && hfsmp->vcbNmFls != 0xFFFF) ++hfsmp->vcbNmFls; break; case VOL_RMFILE: if (hfsmp->hfs_filecount != 0) --hfsmp->hfs_filecount; if (inroot && hfsmp->vcbNmFls != 0xFFFF) --hfsmp->vcbNmFls; break; } lck_mtx_unlock(&hfsmp->hfs_mutex); if (hfsmp->jnl) { hfs_flushvolumeheader(hfsmp, 0, 0); } return (0); } static int hfs_flushMDB(struct hfsmount *hfsmp, int waitfor, int altflush) { ExtendedVCB *vcb = HFSTOVCB(hfsmp); struct filefork *fp; HFSMasterDirectoryBlock *mdb; struct buf *bp = NULL; int retval; int sectorsize; ByteCount namelen; sectorsize = hfsmp->hfs_phys_block_size; retval = (int)buf_bread(hfsmp->hfs_devvp, (daddr64_t)HFS_PRI_SECTOR(sectorsize), sectorsize, NOCRED, &bp); if (retval) { if (bp) buf_brelse(bp); return retval; } lck_mtx_lock(&hfsmp->hfs_mutex); mdb = (HFSMasterDirectoryBlock *)(buf_dataptr(bp) + HFS_PRI_OFFSET(sectorsize)); mdb->drCrDate = SWAP_BE32 (UTCToLocal(to_hfs_time(vcb->vcbCrDate))); mdb->drLsMod = SWAP_BE32 (UTCToLocal(to_hfs_time(vcb->vcbLsMod))); mdb->drAtrb = SWAP_BE16 (vcb->vcbAtrb); mdb->drNmFls = SWAP_BE16 (vcb->vcbNmFls); mdb->drAllocPtr = SWAP_BE16 (vcb->nextAllocation); mdb->drClpSiz = SWAP_BE32 (vcb->vcbClpSiz); mdb->drNxtCNID = SWAP_BE32 (vcb->vcbNxtCNID); mdb->drFreeBks = SWAP_BE16 (vcb->freeBlocks); namelen = strlen(vcb->vcbVN); retval = utf8_to_hfs(vcb, namelen, vcb->vcbVN, mdb->drVN); /* Retry with MacRoman in case that's how it was exported. */ if (retval) retval = utf8_to_mac_roman(namelen, vcb->vcbVN, mdb->drVN); mdb->drVolBkUp = SWAP_BE32 (UTCToLocal(to_hfs_time(vcb->vcbVolBkUp))); mdb->drWrCnt = SWAP_BE32 (vcb->vcbWrCnt); mdb->drNmRtDirs = SWAP_BE16 (vcb->vcbNmRtDirs); mdb->drFilCnt = SWAP_BE32 (vcb->vcbFilCnt); mdb->drDirCnt = SWAP_BE32 (vcb->vcbDirCnt); bcopy(vcb->vcbFndrInfo, mdb->drFndrInfo, sizeof(mdb->drFndrInfo)); fp = VTOF(vcb->extentsRefNum); mdb->drXTExtRec[0].startBlock = SWAP_BE16 (fp->ff_extents[0].startBlock); mdb->drXTExtRec[0].blockCount = SWAP_BE16 (fp->ff_extents[0].blockCount); mdb->drXTExtRec[1].startBlock = SWAP_BE16 (fp->ff_extents[1].startBlock); mdb->drXTExtRec[1].blockCount = SWAP_BE16 (fp->ff_extents[1].blockCount); mdb->drXTExtRec[2].startBlock = SWAP_BE16 (fp->ff_extents[2].startBlock); mdb->drXTExtRec[2].blockCount = SWAP_BE16 (fp->ff_extents[2].blockCount); mdb->drXTFlSize = SWAP_BE32 (fp->ff_blocks * vcb->blockSize); mdb->drXTClpSiz = SWAP_BE32 (fp->ff_clumpsize); FTOC(fp)->c_flag &= ~C_MODIFIED; fp = VTOF(vcb->catalogRefNum); mdb->drCTExtRec[0].startBlock = SWAP_BE16 (fp->ff_extents[0].startBlock); mdb->drCTExtRec[0].blockCount = SWAP_BE16 (fp->ff_extents[0].blockCount); mdb->drCTExtRec[1].startBlock = SWAP_BE16 (fp->ff_extents[1].startBlock); mdb->drCTExtRec[1].blockCount = SWAP_BE16 (fp->ff_extents[1].blockCount); mdb->drCTExtRec[2].startBlock = SWAP_BE16 (fp->ff_extents[2].startBlock); mdb->drCTExtRec[2].blockCount = SWAP_BE16 (fp->ff_extents[2].blockCount); mdb->drCTFlSize = SWAP_BE32 (fp->ff_blocks * vcb->blockSize); mdb->drCTClpSiz = SWAP_BE32 (fp->ff_clumpsize); FTOC(fp)->c_flag &= ~C_MODIFIED; MarkVCBClean( vcb ); lck_mtx_unlock(&hfsmp->hfs_mutex); /* If requested, flush out the alternate MDB */ if (altflush) { struct buf *alt_bp = NULL; if (buf_meta_bread(hfsmp->hfs_devvp, hfsmp->hfs_alt_id_sector, sectorsize, NOCRED, &alt_bp) == 0) { bcopy(mdb, (char *)buf_dataptr(alt_bp) + HFS_ALT_OFFSET(sectorsize), kMDBSize); (void) VNOP_BWRITE(alt_bp); } else if (alt_bp) buf_brelse(alt_bp); } if (waitfor != MNT_WAIT) buf_bawrite(bp); else retval = VNOP_BWRITE(bp); return (retval); } /* * Flush any dirty in-memory mount data to the on-disk * volume header. * * Note: the on-disk volume signature is intentionally * not flushed since the on-disk "H+" and "HX" signatures * are always stored in-memory as "H+". */ __private_extern__ int hfs_flushvolumeheader(struct hfsmount *hfsmp, int waitfor, int altflush) { ExtendedVCB *vcb = HFSTOVCB(hfsmp); struct filefork *fp; HFSPlusVolumeHeader *volumeHeader; int retval; struct buf *bp; int i; int sectorsize; daddr64_t priIDSector; int critical = 0; u_int16_t signature; u_int16_t hfsversion; if (hfsmp->hfs_flags & HFS_READ_ONLY) { return(0); } if (vcb->vcbSigWord == kHFSSigWord) return hfs_flushMDB(hfsmp, waitfor, altflush); if (altflush) critical = 1; sectorsize = hfsmp->hfs_phys_block_size; priIDSector = (daddr64_t)((vcb->hfsPlusIOPosOffset / sectorsize) + HFS_PRI_SECTOR(sectorsize)); if (hfs_start_transaction(hfsmp) != 0) { return EINVAL; } retval = (int)buf_meta_bread(hfsmp->hfs_devvp, priIDSector, sectorsize, NOCRED, &bp); if (retval) { if (bp) buf_brelse(bp); hfs_end_transaction(hfsmp); printf("HFS: err %d reading VH blk (%s)\n", retval, vcb->vcbVN); return (retval); } if (hfsmp->jnl) { journal_modify_block_start(hfsmp->jnl, bp); } volumeHeader = (HFSPlusVolumeHeader *)((char *)buf_dataptr(bp) + HFS_PRI_OFFSET(sectorsize)); /* * Sanity check what we just read. */ signature = SWAP_BE16 (volumeHeader->signature); hfsversion = SWAP_BE16 (volumeHeader->version); if ((signature != kHFSPlusSigWord && signature != kHFSXSigWord) || (hfsversion < kHFSPlusVersion) || (hfsversion > 100) || (SWAP_BE32 (volumeHeader->blockSize) != vcb->blockSize)) { #if 1 panic("HFS: corrupt VH on %s, sig 0x%04x, ver %d, blksize %d", vcb->vcbVN, signature, hfsversion, SWAP_BE32 (volumeHeader->blockSize)); #endif printf("HFS: corrupt VH blk (%s)\n", vcb->vcbVN); buf_brelse(bp); return (EIO); } /* * For embedded HFS+ volumes, update create date if it changed * (ie from a setattrlist call) */ if ((vcb->hfsPlusIOPosOffset != 0) && (SWAP_BE32 (volumeHeader->createDate) != vcb->localCreateDate)) { struct buf *bp2; HFSMasterDirectoryBlock *mdb; retval = (int)buf_meta_bread(hfsmp->hfs_devvp, (daddr64_t)HFS_PRI_SECTOR(sectorsize), sectorsize, NOCRED, &bp2); if (retval) { if (bp2) buf_brelse(bp2); retval = 0; } else { mdb = (HFSMasterDirectoryBlock *)(buf_dataptr(bp2) + HFS_PRI_OFFSET(sectorsize)); if ( SWAP_BE32 (mdb->drCrDate) != vcb->localCreateDate ) { if (hfsmp->jnl) { journal_modify_block_start(hfsmp->jnl, bp2); } mdb->drCrDate = SWAP_BE32 (vcb->localCreateDate); /* pick up the new create date */ if (hfsmp->jnl) { journal_modify_block_end(hfsmp->jnl, bp2); } else { (void) VNOP_BWRITE(bp2); /* write out the changes */ } } else { buf_brelse(bp2); /* just release it */ } } } if (1 /* hfsmp->jnl == 0 */) { lck_mtx_lock(&hfsmp->hfs_mutex); } /* Note: only update the lower 16 bits worth of attributes */ volumeHeader->attributes = SWAP_BE32 (vcb->vcbAtrb); volumeHeader->journalInfoBlock = SWAP_BE32 (vcb->vcbJinfoBlock); if (hfsmp->jnl) { volumeHeader->lastMountedVersion = SWAP_BE32 (kHFSJMountVersion); } else { volumeHeader->lastMountedVersion = SWAP_BE32 (kHFSPlusMountVersion); } volumeHeader->createDate = SWAP_BE32 (vcb->localCreateDate); /* volume create date is in local time */ volumeHeader->modifyDate = SWAP_BE32 (to_hfs_time(vcb->vcbLsMod)); volumeHeader->backupDate = SWAP_BE32 (to_hfs_time(vcb->vcbVolBkUp)); volumeHeader->fileCount = SWAP_BE32 (vcb->vcbFilCnt); volumeHeader->folderCount = SWAP_BE32 (vcb->vcbDirCnt); volumeHeader->totalBlocks = SWAP_BE32 (vcb->totalBlocks); volumeHeader->freeBlocks = SWAP_BE32 (vcb->freeBlocks); volumeHeader->nextAllocation = SWAP_BE32 (vcb->nextAllocation); volumeHeader->rsrcClumpSize = SWAP_BE32 (vcb->vcbClpSiz); volumeHeader->dataClumpSize = SWAP_BE32 (vcb->vcbClpSiz); volumeHeader->nextCatalogID = SWAP_BE32 (vcb->vcbNxtCNID); volumeHeader->writeCount = SWAP_BE32 (vcb->vcbWrCnt); volumeHeader->encodingsBitmap = SWAP_BE64 (vcb->encodingsBitmap); if (bcmp(vcb->vcbFndrInfo, volumeHeader->finderInfo, sizeof(volumeHeader->finderInfo)) != 0) { bcopy(vcb->vcbFndrInfo, volumeHeader->finderInfo, sizeof(volumeHeader->finderInfo)); critical = 1; } /* Sync Extents over-flow file meta data */ fp = VTOF(vcb->extentsRefNum); if (FTOC(fp)->c_flag & C_MODIFIED) { for (i = 0; i < kHFSPlusExtentDensity; i++) { volumeHeader->extentsFile.extents[i].startBlock = SWAP_BE32 (fp->ff_extents[i].startBlock); volumeHeader->extentsFile.extents[i].blockCount = SWAP_BE32 (fp->ff_extents[i].blockCount); } volumeHeader->extentsFile.logicalSize = SWAP_BE64 (fp->ff_size); volumeHeader->extentsFile.totalBlocks = SWAP_BE32 (fp->ff_blocks); volumeHeader->extentsFile.clumpSize = SWAP_BE32 (fp->ff_clumpsize); FTOC(fp)->c_flag &= ~C_MODIFIED; } /* Sync Catalog file meta data */ fp = VTOF(vcb->catalogRefNum); if (FTOC(fp)->c_flag & C_MODIFIED) { for (i = 0; i < kHFSPlusExtentDensity; i++) { volumeHeader->catalogFile.extents[i].startBlock = SWAP_BE32 (fp->ff_extents[i].startBlock); volumeHeader->catalogFile.extents[i].blockCount = SWAP_BE32 (fp->ff_extents[i].blockCount); } volumeHeader->catalogFile.logicalSize = SWAP_BE64 (fp->ff_size); volumeHeader->catalogFile.totalBlocks = SWAP_BE32 (fp->ff_blocks); volumeHeader->catalogFile.clumpSize = SWAP_BE32 (fp->ff_clumpsize); FTOC(fp)->c_flag &= ~C_MODIFIED; } /* Sync Allocation file meta data */ fp = VTOF(vcb->allocationsRefNum); if (FTOC(fp)->c_flag & C_MODIFIED) { for (i = 0; i < kHFSPlusExtentDensity; i++) { volumeHeader->allocationFile.extents[i].startBlock = SWAP_BE32 (fp->ff_extents[i].startBlock); volumeHeader->allocationFile.extents[i].blockCount = SWAP_BE32 (fp->ff_extents[i].blockCount); } volumeHeader->allocationFile.logicalSize = SWAP_BE64 (fp->ff_size); volumeHeader->allocationFile.totalBlocks = SWAP_BE32 (fp->ff_blocks); volumeHeader->allocationFile.clumpSize = SWAP_BE32 (fp->ff_clumpsize); FTOC(fp)->c_flag &= ~C_MODIFIED; } /* Sync Attribute file meta data */ if (hfsmp->hfs_attribute_vp) { fp = VTOF(hfsmp->hfs_attribute_vp); for (i = 0; i < kHFSPlusExtentDensity; i++) { volumeHeader->attributesFile.extents[i].startBlock = SWAP_BE32 (fp->ff_extents[i].startBlock); volumeHeader->attributesFile.extents[i].blockCount = SWAP_BE32 (fp->ff_extents[i].blockCount); } FTOC(fp)->c_flag &= ~C_MODIFIED; volumeHeader->attributesFile.logicalSize = SWAP_BE64 (fp->ff_size); volumeHeader->attributesFile.totalBlocks = SWAP_BE32 (fp->ff_blocks); volumeHeader->attributesFile.clumpSize = SWAP_BE32 (fp->ff_clumpsize); } vcb->vcbFlags &= 0x00FF; if (1 /* hfsmp->jnl == 0 */) { lck_mtx_unlock(&hfsmp->hfs_mutex); } /* If requested, flush out the alternate volume header */ if (altflush && hfsmp->hfs_alt_id_sector) { struct buf *alt_bp = NULL; if (buf_meta_bread(hfsmp->hfs_devvp, hfsmp->hfs_alt_id_sector, sectorsize, NOCRED, &alt_bp) == 0) { if (hfsmp->jnl) { journal_modify_block_start(hfsmp->jnl, alt_bp); } bcopy(volumeHeader, (char *)buf_dataptr(alt_bp) + HFS_ALT_OFFSET(sectorsize), kMDBSize); if (hfsmp->jnl) { journal_modify_block_end(hfsmp->jnl, alt_bp); } else { (void) VNOP_BWRITE(alt_bp); } } else if (alt_bp) buf_brelse(alt_bp); } if (hfsmp->jnl) { journal_modify_block_end(hfsmp->jnl, bp); } else { if (waitfor != MNT_WAIT) buf_bawrite(bp); else { retval = VNOP_BWRITE(bp); /* When critical data changes, flush the device cache */ if (critical && (retval == 0)) { (void) VNOP_IOCTL(hfsmp->hfs_devvp, DKIOCSYNCHRONIZECACHE, NULL, FWRITE, NULL); } } } hfs_end_transaction(hfsmp); return (retval); } /* * Extend a file system. */ __private_extern__ int hfs_extendfs(struct hfsmount *hfsmp, u_int64_t newsize, vfs_context_t context) { struct proc *p = vfs_context_proc(context); kauth_cred_t cred = vfs_context_ucred(context); struct vnode *vp; struct vnode *devvp; struct buf *bp; struct filefork *fp = NULL; ExtendedVCB *vcb; struct cat_fork forkdata; u_int64_t oldsize; u_int64_t newblkcnt; u_int64_t prev_phys_block_count; u_int32_t addblks; u_int64_t sectorcnt; u_int32_t sectorsize; daddr64_t prev_alt_sector; daddr_t bitmapblks; int lockflags; int error; devvp = hfsmp->hfs_devvp; vcb = HFSTOVCB(hfsmp); /* * - HFS Plus file systems only. * - Journaling must be enabled. * - No embedded volumes. */ if ((vcb->vcbSigWord == kHFSSigWord) || (hfsmp->jnl == NULL) || (vcb->hfsPlusIOPosOffset != 0)) { return (EPERM); } /* * If extending file system by non-root, then verify * ownership and check permissions. */ if (suser(cred, NULL)) { error = hfs_vget(hfsmp, kHFSRootFolderID, &vp, 0); if (error) return (error); error = hfs_owner_rights(hfsmp, VTOC(vp)->c_uid, cred, p, 0); if (error == 0) { error = hfs_write_access(vp, cred, p, false); } hfs_unlock(VTOC(vp)); vnode_put(vp); if (error) return (error); error = vnode_authorize(devvp, NULL, KAUTH_VNODE_READ_DATA | KAUTH_VNODE_WRITE_DATA, context); if (error) return (error); } if (VNOP_IOCTL(devvp, DKIOCGETBLOCKSIZE, (caddr_t)§orsize, 0, context)) { return (ENXIO); } if (sectorsize != hfsmp->hfs_phys_block_size) { return (ENXIO); } if (VNOP_IOCTL(devvp, DKIOCGETBLOCKCOUNT, (caddr_t)§orcnt, 0, context)) { return (ENXIO); } if ((sectorsize * sectorcnt) < newsize) { printf("hfs_extendfs: not enough space on device\n"); return (ENOSPC); } oldsize = (u_int64_t)hfsmp->totalBlocks * (u_int64_t)hfsmp->blockSize; /* * Validate new size. */ if ((newsize <= oldsize) || (newsize % sectorsize)) { printf("hfs_extendfs: invalid size\n"); return (EINVAL); } newblkcnt = newsize / vcb->blockSize; if (newblkcnt > (u_int64_t)0xFFFFFFFF) return (EOVERFLOW); addblks = newblkcnt - vcb->totalBlocks; printf("hfs_extendfs: growing %s by %d blocks\n", vcb->vcbVN, addblks); /* * Enclose changes inside a transaction. */ if (hfs_start_transaction(hfsmp) != 0) { return (EINVAL); } lockflags = hfs_systemfile_lock(hfsmp, SFL_EXTENTS | SFL_BITMAP, HFS_EXCLUSIVE_LOCK); vp = vcb->allocationsRefNum; fp = VTOF(vp); bcopy(&fp->ff_data, &forkdata, sizeof(forkdata)); /* * Calculate additional space required (if any) by allocation bitmap. */ bitmapblks = roundup(newblkcnt / 8, vcb->vcbVBMIOSize) / vcb->blockSize; if (bitmapblks > (daddr_t)fp->ff_blocks) bitmapblks -= fp->ff_blocks; else bitmapblks = 0; if (bitmapblks > 0) { daddr64_t blkno; daddr_t blkcnt; /* * Add a new extent to the allocation bitmap file. */ error = AddFileExtent(vcb, fp, vcb->totalBlocks, bitmapblks); if (error) { printf("hfs_extendfs: error %d adding extents\n", error); goto out; } blkcnt = bitmapblks; blkno = (daddr64_t)fp->ff_blocks; fp->ff_blocks += bitmapblks; fp->ff_size += (u_int64_t)bitmapblks * (u_int64_t)vcb->blockSize; VTOC(vp)->c_blocks = fp->ff_blocks; /* * Zero out the new bitmap blocks. */ { bp = NULL; while (blkcnt > 0) { error = (int)buf_meta_bread(vp, blkno, vcb->blockSize, NOCRED, &bp); if (error) { if (bp) { buf_brelse(bp); } break; } bzero((char *)buf_dataptr(bp), vcb->blockSize); buf_markaged(bp); error = (int)buf_bwrite(bp); if (error) break; --blkcnt; ++blkno; } } if (error) { printf("hfs_extendfs: error %d clearing blocks\n", error); goto out; } /* * Mark the new bitmap space as allocated. */ error = BlockMarkAllocated(vcb, vcb->totalBlocks, bitmapblks); if (error) { printf("hfs_extendfs: error %d setting bitmap\n", error); goto out; } } /* * Mark the new alternate VH as allocated. */ if (vcb->blockSize == 512) error = BlockMarkAllocated(vcb, vcb->totalBlocks + addblks - 2, 2); else error = BlockMarkAllocated(vcb, vcb->totalBlocks + addblks - 1, 1); if (error) { printf("hfs_extendfs: error %d setting bitmap (VH)\n", error); goto out; } /* * Mark the old alternate VH as free. */ if (vcb->blockSize == 512) (void) BlockMarkFree(vcb, vcb->totalBlocks - 2, 2); else (void) BlockMarkFree(vcb, vcb->totalBlocks - 1, 1); /* * Adjust file system variables for new space. */ prev_phys_block_count = hfsmp->hfs_phys_block_count; prev_alt_sector = hfsmp->hfs_alt_id_sector; vcb->totalBlocks += addblks; vcb->freeBlocks += addblks - bitmapblks; hfsmp->hfs_phys_block_count = newsize / sectorsize; hfsmp->hfs_alt_id_sector = (hfsmp->hfsPlusIOPosOffset / sectorsize) + HFS_ALT_SECTOR(sectorsize, hfsmp->hfs_phys_block_count); MarkVCBDirty(vcb); error = hfs_flushvolumeheader(hfsmp, MNT_WAIT, HFS_ALTFLUSH); if (error) { printf("hfs_extendfs: couldn't flush volume headers (%d)", error); /* * Restore to old state. */ fp->ff_size -= (u_int64_t)bitmapblks * (u_int64_t)vcb->blockSize; vcb->totalBlocks -= addblks; vcb->freeBlocks -= addblks - bitmapblks; hfsmp->hfs_phys_block_count = prev_phys_block_count; hfsmp->hfs_alt_id_sector = prev_alt_sector; MarkVCBDirty(vcb); if (vcb->blockSize == 512) (void) BlockMarkAllocated(vcb, vcb->totalBlocks - 2, 2); else (void) BlockMarkAllocated(vcb, vcb->totalBlocks - 1, 1); goto out; } /* * Invalidate the old alternate volume header. */ bp = NULL; if (prev_alt_sector) { if (buf_meta_bread(hfsmp->hfs_devvp, prev_alt_sector, sectorsize, NOCRED, &bp) == 0) { journal_modify_block_start(hfsmp->jnl, bp); bzero((char *)buf_dataptr(bp) + HFS_ALT_OFFSET(sectorsize), kMDBSize); journal_modify_block_end(hfsmp->jnl, bp); } else if (bp) { buf_brelse(bp); } } out: if (error && fp) { /* Restore allocation fork. */ bcopy(&forkdata, &fp->ff_data, sizeof(forkdata)); VTOC(vp)->c_blocks = fp->ff_blocks; } hfs_systemfile_unlock(hfsmp, lockflags); hfs_end_transaction(hfsmp); return (error); } #define HFS_MIN_SIZE (32LL * 1024LL * 1024LL) /* * Truncate a file system (while still mounted). */ __private_extern__ int hfs_truncatefs(struct hfsmount *hfsmp, u_int64_t newsize, __unused vfs_context_t context) { struct vnode* rvp = NULL; struct buf *bp = NULL; u_int64_t oldsize; u_int32_t newblkcnt; u_int32_t reclaimblks; int lockflags = 0; int transaction_begun = 0; int error; /* * Grab the root vnode to serialize with another hfs_truncatefs call. */ error = hfs_vget(hfsmp, kHFSRootFolderID, &rvp, 0); if (error) { return (error); } /* * - HFS Plus file systems only. * - Journaling must be enabled. * - No embedded volumes. */ if ((hfsmp->hfs_flags & HFS_STANDARD) || (hfsmp->jnl == NULL) || (hfsmp->hfsPlusIOPosOffset != 0)) { error = EPERM; goto out; } oldsize = (u_int64_t)hfsmp->totalBlocks * (u_int64_t)hfsmp->blockSize; newblkcnt = newsize / hfsmp->blockSize; reclaimblks = hfsmp->totalBlocks - newblkcnt; /* Make sure new size is valid. */ if ((newsize < HFS_MIN_SIZE) || (newsize >= oldsize) || (newsize % hfsmp->hfs_phys_block_size)) { error = EINVAL; goto out; } /* Make sure there's enough space to work with. */ if (reclaimblks > (hfsmp->freeBlocks / 4)) { error = ENOSPC; goto out; } printf("hfs_truncatefs: shrinking %s by %d blocks out of %d\n", hfsmp->vcbVN, reclaimblks, hfsmp->totalBlocks); if (hfs_start_transaction(hfsmp) != 0) { error = EINVAL; goto out; } transaction_begun = 1; /* * Look for files that have blocks beyond newblkcnt. */ if (hfs_isallocated(hfsmp, newblkcnt, reclaimblks - 1)) { /* * hfs_reclaimspace will use separate transactions when * relocating files (so we don't overwhelm the journal). */ hfs_end_transaction(hfsmp); transaction_begun = 0; /* Attempt to reclaim some space. */ if (hfs_reclaimspace(hfsmp, newblkcnt) != 0) { printf("hfs_truncatefs: couldn't reclaim space on %s\n", hfsmp->vcbVN); error = ENOSPC; goto out; } if (hfs_start_transaction(hfsmp) != 0) { error = EINVAL; goto out; } transaction_begun = 1; /* Check if we're clear now. */ if (hfs_isallocated(hfsmp, newblkcnt, reclaimblks - 1)) { printf("hfs_truncatefs: didn't reclaim enough space on %s\n", hfsmp->vcbVN); error = ENOSPC; goto out; } } lockflags = hfs_systemfile_lock(hfsmp, SFL_EXTENTS | SFL_BITMAP, HFS_EXCLUSIVE_LOCK); /* * Mark the old alternate volume header as free. * We don't bother shrinking allocation bitmap file. */ if (hfsmp->blockSize == 512) (void) BlockMarkFree(hfsmp, hfsmp->totalBlocks - 2, 2); else (void) BlockMarkFree(hfsmp, hfsmp->totalBlocks - 1, 1); /* * Allocate last block for alternate volume header. */ if (hfsmp->blockSize == 512) error = BlockMarkAllocated(hfsmp, newblkcnt - 2, 2); else error = BlockMarkAllocated(hfsmp, newblkcnt - 1, 1); if (error) { goto out; } /* * Invalidate the existing alternate volume header. */ if (hfsmp->hfs_alt_id_sector) { if (buf_meta_bread(hfsmp->hfs_devvp, hfsmp->hfs_alt_id_sector, hfsmp->hfs_phys_block_size, NOCRED, &bp) == 0) { journal_modify_block_start(hfsmp->jnl, bp); bzero((void*)((char *)buf_dataptr(bp) + HFS_ALT_OFFSET(hfsmp->hfs_phys_block_size)), kMDBSize); journal_modify_block_end(hfsmp->jnl, bp); } else if (bp) { buf_brelse(bp); } bp = NULL; } /* * Adjust file system variables and flush them to disk. */ hfsmp->freeBlocks -= hfsmp->totalBlocks - newblkcnt; hfsmp->totalBlocks = newblkcnt; hfsmp->hfs_phys_block_count = newsize / hfsmp->hfs_phys_block_size; hfsmp->hfs_alt_id_sector = HFS_ALT_SECTOR(hfsmp->hfs_phys_block_size, hfsmp->hfs_phys_block_count); MarkVCBDirty(hfsmp); error = hfs_flushvolumeheader(hfsmp, MNT_WAIT, HFS_ALTFLUSH); if (error) panic("hfs_truncatefs: unexpected error flushing volume header (%d)\n", error); out: if (lockflags) { hfs_systemfile_unlock(hfsmp, lockflags); } if (transaction_begun) { hfs_end_transaction(hfsmp); } if (rvp) { hfs_unlock(VTOC(rvp)); vnode_put(rvp); } return (error); } /* * Reclaim space at the end of a file system. */ static int hfs_reclaimspace(struct hfsmount *hfsmp, u_long startblk) { struct vnode *vp = NULL; FCB *fcb; struct BTreeIterator * iterator = NULL; struct FSBufferDescriptor btdata; struct HFSPlusCatalogFile filerec; u_int32_t saved_next_allocation; cnid_t * cnidbufp; size_t cnidbufsize; int filecnt; int maxfilecnt; u_long block; int lockflags; int i; int error; /* * Check if Attributes file overlaps. */ if (hfsmp->hfs_attribute_vp) { struct filefork *fp; fp = VTOF(hfsmp->hfs_attribute_vp); for (i = 0; i < kHFSPlusExtentDensity; ++i) { block = fp->ff_extents[i].startBlock + fp->ff_extents[i].blockCount; if (block >= startblk) { printf("hfs_reclaimspace: Attributes file can't move\n"); return (EPERM); } } } /* For now we'll move a maximum of 16,384 files. */ maxfilecnt = MIN(hfsmp->hfs_filecount, 16384); cnidbufsize = maxfilecnt * sizeof(cnid_t); if (kmem_alloc(kernel_map, (vm_offset_t *)&cnidbufp, cnidbufsize)) { return (ENOMEM); } if (kmem_alloc(kernel_map, (vm_offset_t *)&iterator, sizeof(*iterator))) { kmem_free(kernel_map, (vm_offset_t)cnidbufp, cnidbufsize); return (ENOMEM); } saved_next_allocation = hfsmp->nextAllocation; hfsmp->nextAllocation = hfsmp->hfs_metazone_start; fcb = VTOF(hfsmp->hfs_catalog_vp); bzero(iterator, sizeof(*iterator)); btdata.bufferAddress = &filerec; btdata.itemSize = sizeof(filerec); btdata.itemCount = 1; /* Keep the Catalog file locked during iteration. */ lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_SHARED_LOCK); error = BTIterateRecord(fcb, kBTreeFirstRecord, iterator, NULL, NULL); if (error) { hfs_systemfile_unlock(hfsmp, lockflags); goto out; } /* * Iterate over all the catalog records looking for files * that overlap into the space we're trying to free up. */ for (filecnt = 0; filecnt < maxfilecnt; ) { error = BTIterateRecord(fcb, kBTreeNextRecord, iterator, &btdata, NULL); if (error) { if (error == btNotFound) error = 0; break; } if (filerec.recordType != kHFSPlusFileRecord || filerec.fileID == hfsmp->hfs_jnlfileid) continue; /* * Check if either fork overlaps target space. */ for (i = 0; i < kHFSPlusExtentDensity; ++i) { block = filerec.dataFork.extents[i].startBlock + filerec.dataFork.extents[i].blockCount; if (block >= startblk) { if (filerec.fileID == hfsmp->hfs_jnlfileid) { printf("hfs_reclaimspace: cannot move active journal\n"); error = EPERM; break; } cnidbufp[filecnt++] = filerec.fileID; break; } block = filerec.resourceFork.extents[i].startBlock + filerec.resourceFork.extents[i].blockCount; if (block >= startblk) { cnidbufp[filecnt++] = filerec.fileID; break; } } } /* All done with catalog. */ hfs_systemfile_unlock(hfsmp, lockflags); if (error) goto out; /* Now move any files that are in the way. */ for (i = 0; i < filecnt; ++i) { struct vnode * rvp; if (hfs_vget(hfsmp, cnidbufp[i], &vp, 0) != 0) continue; /* Relocate any data fork blocks. */ if (VTOF(vp)->ff_blocks > 0) { error = hfs_relocate(vp, hfsmp->hfs_metazone_end + 1, kauth_cred_get(), current_proc()); } if (error) break; /* Relocate any resource fork blocks. */ if ((VTOC((vp))->c_blocks - VTOF((vp))->ff_blocks) > 0) { error = hfs_vgetrsrc(hfsmp, vp, &rvp, current_proc()); if (error) break; error = hfs_relocate(rvp, hfsmp->hfs_metazone_end + 1, kauth_cred_get(), current_proc()); vnode_put(rvp); if (error) break; } hfs_unlock(VTOC(vp)); vnode_put(vp); vp = NULL; } if (vp) { hfs_unlock(VTOC(vp)); vnode_put(vp); vp = NULL; } /* * Note: this implementation doesn't handle overflow extents. */ out: kmem_free(kernel_map, (vm_offset_t)iterator, sizeof(*iterator)); kmem_free(kernel_map, (vm_offset_t)cnidbufp, cnidbufsize); /* On errors restore the roving allocation pointer. */ if (error) { hfsmp->nextAllocation = saved_next_allocation; } return (error); } /* * Get file system attributes. */ static int hfs_vfs_getattr(struct mount *mp, struct vfs_attr *fsap, __unused vfs_context_t context) { ExtendedVCB *vcb = VFSTOVCB(mp); struct hfsmount *hfsmp = VFSTOHFS(mp); u_long freeCNIDs; freeCNIDs = (u_long)0xFFFFFFFF - (u_long)hfsmp->vcbNxtCNID; VFSATTR_RETURN(fsap, f_objcount, (uint64_t)hfsmp->vcbFilCnt + (uint64_t)hfsmp->vcbDirCnt); VFSATTR_RETURN(fsap, f_filecount, (uint64_t)hfsmp->vcbFilCnt); VFSATTR_RETURN(fsap, f_dircount, (uint64_t)hfsmp->vcbDirCnt); VFSATTR_RETURN(fsap, f_maxobjcount, (uint64_t)0xFFFFFFFF); VFSATTR_RETURN(fsap, f_iosize, (size_t)(MAX_UPL_TRANSFER * PAGE_SIZE)); VFSATTR_RETURN(fsap, f_blocks, (uint64_t)hfsmp->totalBlocks); VFSATTR_RETURN(fsap, f_bfree, (uint64_t)hfs_freeblks(hfsmp, 0)); VFSATTR_RETURN(fsap, f_bavail, (uint64_t)hfs_freeblks(hfsmp, 1)); VFSATTR_RETURN(fsap, f_bsize, (uint32_t)vcb->blockSize); /* XXX needs clarification */ VFSATTR_RETURN(fsap, f_bused, hfsmp->totalBlocks - hfs_freeblks(hfsmp, 1)); /* Maximum files is constrained by total blocks. */ VFSATTR_RETURN(fsap, f_files, (uint64_t)(hfsmp->totalBlocks - 2)); VFSATTR_RETURN(fsap, f_ffree, MIN((uint64_t)freeCNIDs, (uint64_t)hfs_freeblks(hfsmp, 1))); fsap->f_fsid.val[0] = hfsmp->hfs_raw_dev; fsap->f_fsid.val[1] = vfs_typenum(mp); VFSATTR_SET_SUPPORTED(fsap, f_fsid); VFSATTR_RETURN(fsap, f_signature, vcb->vcbSigWord); VFSATTR_RETURN(fsap, f_carbon_fsid, 0); if (VFSATTR_IS_ACTIVE(fsap, f_capabilities)) { vol_capabilities_attr_t *cap; cap = &fsap->f_capabilities; if (hfsmp->hfs_flags & HFS_STANDARD) { cap->capabilities[VOL_CAPABILITIES_FORMAT] = VOL_CAP_FMT_PERSISTENTOBJECTIDS | VOL_CAP_FMT_CASE_PRESERVING | VOL_CAP_FMT_FAST_STATFS; } else { cap->capabilities[VOL_CAPABILITIES_FORMAT] = VOL_CAP_FMT_PERSISTENTOBJECTIDS | VOL_CAP_FMT_SYMBOLICLINKS | VOL_CAP_FMT_HARDLINKS | VOL_CAP_FMT_JOURNAL | (hfsmp->jnl ? VOL_CAP_FMT_JOURNAL_ACTIVE : 0) | (hfsmp->hfs_flags & HFS_CASE_SENSITIVE ? VOL_CAP_FMT_CASE_SENSITIVE : 0) | VOL_CAP_FMT_CASE_PRESERVING | VOL_CAP_FMT_FAST_STATFS | VOL_CAP_FMT_2TB_FILESIZE; } cap->capabilities[VOL_CAPABILITIES_INTERFACES] = VOL_CAP_INT_SEARCHFS | VOL_CAP_INT_ATTRLIST | VOL_CAP_INT_NFSEXPORT | VOL_CAP_INT_READDIRATTR | VOL_CAP_INT_EXCHANGEDATA | VOL_CAP_INT_ALLOCATE | VOL_CAP_INT_VOL_RENAME | VOL_CAP_INT_ADVLOCK | VOL_CAP_INT_FLOCK; cap->capabilities[VOL_CAPABILITIES_RESERVED1] = 0; cap->capabilities[VOL_CAPABILITIES_RESERVED2] = 0; cap->valid[VOL_CAPABILITIES_FORMAT] = VOL_CAP_FMT_PERSISTENTOBJECTIDS | VOL_CAP_FMT_SYMBOLICLINKS | VOL_CAP_FMT_HARDLINKS | VOL_CAP_FMT_JOURNAL | VOL_CAP_FMT_JOURNAL_ACTIVE | VOL_CAP_FMT_NO_ROOT_TIMES | VOL_CAP_FMT_SPARSE_FILES | VOL_CAP_FMT_ZERO_RUNS | VOL_CAP_FMT_CASE_SENSITIVE | VOL_CAP_FMT_CASE_PRESERVING | VOL_CAP_FMT_FAST_STATFS | VOL_CAP_FMT_2TB_FILESIZE; cap->valid[VOL_CAPABILITIES_INTERFACES] = VOL_CAP_INT_SEARCHFS | VOL_CAP_INT_ATTRLIST | VOL_CAP_INT_NFSEXPORT | VOL_CAP_INT_READDIRATTR | VOL_CAP_INT_EXCHANGEDATA | VOL_CAP_INT_COPYFILE | VOL_CAP_INT_ALLOCATE | VOL_CAP_INT_VOL_RENAME | VOL_CAP_INT_ADVLOCK | VOL_CAP_INT_FLOCK; cap->valid[VOL_CAPABILITIES_RESERVED1] = 0; cap->valid[VOL_CAPABILITIES_RESERVED2] = 0; VFSATTR_SET_SUPPORTED(fsap, f_capabilities); } if (VFSATTR_IS_ACTIVE(fsap, f_attributes)) { vol_attributes_attr_t *attrp = &fsap->f_attributes; attrp->validattr.commonattr = ATTR_CMN_VALIDMASK; attrp->validattr.volattr = ATTR_VOL_VALIDMASK & ~ATTR_VOL_INFO; attrp->validattr.dirattr = ATTR_DIR_VALIDMASK; attrp->validattr.fileattr = ATTR_FILE_VALIDMASK; attrp->validattr.forkattr = 0; attrp->nativeattr.commonattr = ATTR_CMN_VALIDMASK; attrp->nativeattr.volattr = ATTR_VOL_VALIDMASK & ~ATTR_VOL_INFO; attrp->nativeattr.dirattr = ATTR_DIR_VALIDMASK; attrp->nativeattr.fileattr = ATTR_FILE_VALIDMASK; attrp->nativeattr.forkattr = 0; VFSATTR_SET_SUPPORTED(fsap, f_attributes); } fsap->f_create_time.tv_sec = hfsmp->vcbCrDate; fsap->f_create_time.tv_nsec = 0; VFSATTR_SET_SUPPORTED(fsap, f_create_time); fsap->f_modify_time.tv_sec = hfsmp->vcbLsMod; fsap->f_modify_time.tv_nsec = 0; VFSATTR_SET_SUPPORTED(fsap, f_modify_time); fsap->f_backup_time.tv_sec = hfsmp->vcbVolBkUp; fsap->f_backup_time.tv_nsec = 0; VFSATTR_SET_SUPPORTED(fsap, f_backup_time); if (VFSATTR_IS_ACTIVE(fsap, f_fssubtype)) { uint16_t subtype = 0; /* * Subtypes (flavors) for HFS * 0: Mac OS Extended * 1: Mac OS Extended (Journaled) * 2: Mac OS Extended (Case Sensitive) * 3: Mac OS Extended (Case Sensitive, Journaled) * 4 - 127: Reserved * 128: Mac OS Standard * */ if (hfsmp->hfs_flags & HFS_STANDARD) { subtype = HFS_SUBTYPE_STANDARDHFS; } else /* HFS Plus */ { if (hfsmp->jnl) subtype |= HFS_SUBTYPE_JOURNALED; if (hfsmp->hfs_flags & HFS_CASE_SENSITIVE) subtype |= HFS_SUBTYPE_CASESENSITIVE; } fsap->f_fssubtype = subtype; VFSATTR_SET_SUPPORTED(fsap, f_fssubtype); } if (VFSATTR_IS_ACTIVE(fsap, f_vol_name)) { strncpy(fsap->f_vol_name, hfsmp->vcbVN, MAXPATHLEN); fsap->f_vol_name[MAXPATHLEN - 1] = 0; VFSATTR_SET_SUPPORTED(fsap, f_vol_name); } return (0); } /* * Perform a volume rename. Requires the FS' root vp. */ static int hfs_rename_volume(struct vnode *vp, const char *name, proc_t p) { ExtendedVCB *vcb = VTOVCB(vp); struct cnode *cp = VTOC(vp); struct hfsmount *hfsmp = VTOHFS(vp); struct cat_desc to_desc; struct cat_desc todir_desc; struct cat_desc new_desc; cat_cookie_t cookie; int lockflags; int error = 0; /* * Ignore attempts to rename a volume to a zero-length name. */ if (name[0] == 0) return(0); bzero(&to_desc, sizeof(to_desc)); bzero(&todir_desc, sizeof(todir_desc)); bzero(&new_desc, sizeof(new_desc)); bzero(&cookie, sizeof(cookie)); todir_desc.cd_parentcnid = kHFSRootParentID; todir_desc.cd_cnid = kHFSRootFolderID; todir_desc.cd_flags = CD_ISDIR; to_desc.cd_nameptr = name; to_desc.cd_namelen = strlen(name); to_desc.cd_parentcnid = kHFSRootParentID; to_desc.cd_cnid = cp->c_cnid; to_desc.cd_flags = CD_ISDIR; if ((error = hfs_lock(cp, HFS_EXCLUSIVE_LOCK)) == 0) { if ((error = hfs_start_transaction(hfsmp)) == 0) { if ((error = cat_preflight(hfsmp, CAT_RENAME, &cookie, p)) == 0) { lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_EXCLUSIVE_LOCK); error = cat_rename(hfsmp, &cp->c_desc, &todir_desc, &to_desc, &new_desc); /* * If successful, update the name in the VCB, ensure it's terminated. */ if (!error) { strncpy(vcb->vcbVN, name, sizeof(vcb->vcbVN)); vcb->vcbVN[sizeof(vcb->vcbVN) - 1] = 0; } hfs_systemfile_unlock(hfsmp, lockflags); cat_postflight(hfsmp, &cookie, p); if (error) vcb->vcbFlags |= 0xFF00; (void) hfs_flushvolumeheader(hfsmp, MNT_WAIT, 0); } hfs_end_transaction(hfsmp); } if (!error) { /* Release old allocated name buffer */ if (cp->c_desc.cd_flags & CD_HASBUF) { char *name = cp->c_desc.cd_nameptr; cp->c_desc.cd_nameptr = 0; cp->c_desc.cd_namelen = 0; cp->c_desc.cd_flags &= ~CD_HASBUF; vfs_removename(name); } /* Update cnode's catalog descriptor */ replace_desc(cp, &new_desc); vcb->volumeNameEncodingHint = new_desc.cd_encoding; cp->c_touch_chgtime = TRUE; } hfs_unlock(cp); } return(error); } /* * Get file system attributes. */ static int hfs_vfs_setattr(struct mount *mp, struct vfs_attr *fsap, __unused vfs_context_t context) { kauth_cred_t cred = vfs_context_ucred(context); int error = 0; /* * Must be superuser or owner of filesystem to change volume attributes */ if (!kauth_cred_issuser(cred) && (kauth_cred_getuid(cred) != vfs_statfs(mp)->f_owner)) return(EACCES); if (VFSATTR_IS_ACTIVE(fsap, f_vol_name)) { vnode_t root_vp; error = hfs_vfs_root(mp, &root_vp, context); if (error) goto out; error = hfs_rename_volume(root_vp, fsap->f_vol_name, vfs_context_proc(context)); (void) vnode_put(root_vp); if (error) goto out; VFSATTR_SET_SUPPORTED(fsap, f_vol_name); } out: return error; } /* * hfs vfs operations. */ struct vfsops hfs_vfsops = { hfs_mount, hfs_start, hfs_unmount, hfs_vfs_root, hfs_quotactl, hfs_vfs_getattr, /* was hfs_statfs */ hfs_sync, hfs_vfs_vget, hfs_fhtovp, hfs_vptofh, hfs_init, hfs_sysctl, hfs_vfs_setattr };