516 lines
16 KiB
C
516 lines
16 KiB
C
/*
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* Copyright (c) 2000-2010 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*-
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* Copyright 1997,1998 Julian Elischer. All rights reserved.
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* julian@freebsd.org
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* devfs_vfsops.c
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*
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*/
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/*
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* NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
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* support for mandatory and extensible security protections. This notice
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* is included in support of clause 2.2 (b) of the Apple Public License,
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* Version 2.0.
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*/
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/*
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* HISTORY
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* Dieter Siegmund (dieter@apple.com) Wed Jul 14 13:37:59 PDT 1999
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* - modified devfs_statfs() to use devfs_stats to calculate the
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* amount of memory used by devfs
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/vnode_internal.h>
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#include <sys/proc.h>
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#include <sys/kauth.h>
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#include <sys/mount_internal.h>
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#include <sys/malloc.h>
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#include <sys/conf.h>
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#include <libkern/OSAtomic.h>
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#include <atm/atm_internal.h>
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#if CONFIG_MACF
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#include <security/mac_framework.h>
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#endif
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#include "devfs.h"
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#include "devfsdefs.h"
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#if FDESC
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#include "fdesc.h"
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#endif /* FDESC */
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static int devfs_statfs( struct mount *mp, struct vfsstatfs *sbp, vfs_context_t ctx);
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static int devfs_vfs_getattr(mount_t mp, struct vfs_attr *fsap, vfs_context_t ctx);
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#if CONFIG_DEV_KMEM
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extern boolean_t dev_kmem_enabled;
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#endif
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/*-
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* Called from the generic VFS startups.
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* This is the second stage of DEVFS initialisation.
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* The probed devices have already been loaded and the
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* basic structure of the DEVFS created.
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* We take the oportunity to mount the hidden DEVFS layer, so that
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* devices from devfs get sync'd.
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*/
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static int
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devfs_init(__unused struct vfsconf *vfsp)
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{
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if (devfs_sinit()) {
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return ENOTSUP;
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}
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devfs_make_node(makedev(0, 0), DEVFS_CHAR,
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UID_ROOT, GID_WHEEL, 0622, "console");
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devfs_make_node(makedev(2, 0), DEVFS_CHAR,
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UID_ROOT, GID_WHEEL, 0666, "tty");
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#if CONFIG_DEV_KMEM
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if (dev_kmem_enabled) {
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/* (3,0) reserved for /dev/mem physical memory */
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devfs_make_node(makedev(3, 1), DEVFS_CHAR,
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UID_ROOT, GID_KMEM, 0640, "kmem");
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}
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#endif
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devfs_make_node(makedev(3, 2), DEVFS_CHAR,
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UID_ROOT, GID_WHEEL, 0666, "null");
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devfs_make_node(makedev(3, 3), DEVFS_CHAR,
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UID_ROOT, GID_WHEEL, 0666, "zero");
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uint32_t logging_config = atm_get_diagnostic_config();
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devfs_make_node(makedev(6, 0), DEVFS_CHAR,
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UID_ROOT, GID_WHEEL, 0600, "klog");
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if (!(logging_config & ATM_TRACE_DISABLE)) {
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devfs_make_node(makedev(7, 0), DEVFS_CHAR,
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UID_LOGD, GID_LOGD, 0600, "oslog");
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if (cdevsw_setkqueueok(7, (&(cdevsw[7])), 0) == -1) {
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return ENOTSUP;
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}
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devfs_make_node(makedev(8, 0), DEVFS_CHAR,
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UID_ROOT, GID_WHEEL, 0600, "oslog_stream");
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if (cdevsw_setkqueueok(8, (&(cdevsw[8])), 0) == -1) {
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return ENOTSUP;
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}
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}
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#if FDESC
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devfs_fdesc_init();
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#endif
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return 0;
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}
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/*-
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* mp - pointer to 'mount' structure
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* path - addr in user space of mount point (ie /usr or whatever)
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* data - addr in user space of mount params including the
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* name of the block special file to treat as a filesystem.
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* (NOT USED)
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* ndp - namei data pointer (NOT USED)
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* p - proc pointer
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* devfs is special in that it doesn't require any device to be mounted..
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* It makes up its data as it goes along.
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* it must be mounted during single user.. until it is, only std{in/out/err}
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* and the root filesystem are available.
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*/
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/*proto*/
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int
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devfs_mount(struct mount *mp, __unused vnode_t devvp, __unused user_addr_t data, vfs_context_t ctx)
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{
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struct devfsmount *devfs_mp_p; /* devfs specific mount info */
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int error;
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/*-
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* If they just want to update, we don't need to do anything.
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*/
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if (mp->mnt_flag & MNT_UPDATE) {
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return 0;
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}
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/* Advisory locking should be handled at the VFS layer */
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vfs_setlocklocal(mp);
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/*-
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* Well, it's not an update, it's a real mount request.
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* Time to get dirty.
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* HERE we should check to see if we are already mounted here.
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*/
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devfs_mp_p = kalloc_type(struct devfsmount,
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Z_WAITOK | Z_ZERO | Z_NOFAIL);
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devfs_mp_p->mount = mp;
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/*-
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* Fill out some fields
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*/
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__IGNORE_WCASTALIGN(mp->mnt_data = (qaddr_t)devfs_mp_p);
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mp->mnt_vfsstat.f_fsid.val[0] = (int32_t)VM_KERNEL_ADDRHASH(devfs_mp_p);
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mp->mnt_vfsstat.f_fsid.val[1] = vfs_typenum(mp);
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mp->mnt_flag |= MNT_LOCAL;
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DEVFS_LOCK();
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error = dev_dup_plane(devfs_mp_p);
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DEVFS_UNLOCK();
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if (error) {
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mp->mnt_data = (qaddr_t)0;
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kfree_type(struct devfsmount, devfs_mp_p);
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return error;
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} else {
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DEVFS_INCR_MOUNTS();
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}
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/*-
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* Copy in the name of the directory the filesystem
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* is to be mounted on.
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* And we clear the remainder of the character strings
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* to be tidy.
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*/
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bzero(mp->mnt_vfsstat.f_mntfromname, MAXPATHLEN);
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bcopy("devfs", mp->mnt_vfsstat.f_mntfromname, 5);
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(void)devfs_statfs(mp, &mp->mnt_vfsstat, ctx);
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return 0;
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}
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static int
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devfs_start(__unused struct mount *mp, __unused int flags, __unused vfs_context_t ctx)
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{
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return 0;
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}
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/*-
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* Unmount the filesystem described by mp.
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*/
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static int
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devfs_unmount( struct mount *mp, int mntflags, __unused vfs_context_t ctx)
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{
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struct devfsmount *devfs_mp_p = (struct devfsmount *)mp->mnt_data;
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int flags = 0;
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int force = 0;
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int error;
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if (mntflags & MNT_FORCE) {
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flags |= FORCECLOSE;
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force = 1;
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}
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error = vflush(mp, NULLVP, flags);
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if (error && !force) {
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return error;
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}
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DEVFS_LOCK();
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devfs_free_plane(devfs_mp_p);
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DEVFS_UNLOCK();
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DEVFS_DECR_MOUNTS();
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kfree_type(struct devfsmount, devfs_mp_p);
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mp->mnt_data = (qaddr_t)0;
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mp->mnt_flag &= ~MNT_LOCAL;
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return 0;
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}
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/* return the address of the root vnode in *vpp */
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static int
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devfs_root(struct mount *mp, struct vnode **vpp, __unused vfs_context_t ctx)
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{
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struct devfsmount *devfs_mp_p = (struct devfsmount *)(mp->mnt_data);
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int error;
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DEVFS_LOCK();
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/* last parameter to devfs_dntovn() is ignored */
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error = devfs_dntovn(devfs_mp_p->plane_root->de_dnp, vpp, NULL);
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DEVFS_UNLOCK();
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return error;
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}
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static int
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devfs_statfs( struct mount *mp, struct vfsstatfs *sbp, __unused vfs_context_t ctx)
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{
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struct devfsmount *devfs_mp_p = (struct devfsmount *)mp->mnt_data;
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/*-
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* Fill in the stat block.
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*/
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//sbp->f_type = mp->mnt_vfsstat.f_type;
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sbp->f_flags = 0; /* XXX */
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sbp->f_bsize = 512;
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sbp->f_iosize = 512;
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sbp->f_blocks = (devfs_stats.mounts * sizeof(struct devfsmount)
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+ devfs_stats.nodes * sizeof(devnode_t)
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+ devfs_stats.entries * sizeof(devdirent_t)
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+ devfs_stats.stringspace
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) / sbp->f_bsize;
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sbp->f_bfree = 0;
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sbp->f_bavail = 0;
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sbp->f_files = devfs_stats.nodes;
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sbp->f_ffree = 0;
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sbp->f_fsid.val[0] = (int32_t)VM_KERNEL_ADDRHASH(devfs_mp_p);
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sbp->f_fsid.val[1] = vfs_typenum(mp);
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return 0;
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}
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static int
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devfs_vfs_getattr(__unused mount_t mp, struct vfs_attr *fsap, __unused vfs_context_t ctx)
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{
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VFSATTR_RETURN(fsap, f_objcount, devfs_stats.nodes);
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VFSATTR_RETURN(fsap, f_maxobjcount, devfs_stats.nodes);
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VFSATTR_RETURN(fsap, f_bsize, 512);
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VFSATTR_RETURN(fsap, f_iosize, 512);
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if (VFSATTR_IS_ACTIVE(fsap, f_blocks) || VFSATTR_IS_ACTIVE(fsap, f_bused)) {
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fsap->f_blocks = (devfs_stats.mounts * sizeof(struct devfsmount)
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+ devfs_stats.nodes * sizeof(devnode_t)
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+ devfs_stats.entries * sizeof(devdirent_t)
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+ devfs_stats.stringspace
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) / fsap->f_bsize;
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fsap->f_bused = fsap->f_blocks;
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VFSATTR_SET_SUPPORTED(fsap, f_blocks);
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VFSATTR_SET_SUPPORTED(fsap, f_bused);
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}
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VFSATTR_RETURN(fsap, f_bfree, 0);
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VFSATTR_RETURN(fsap, f_bavail, 0);
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VFSATTR_RETURN(fsap, f_files, devfs_stats.nodes);
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VFSATTR_RETURN(fsap, f_ffree, 0);
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VFSATTR_RETURN(fsap, f_fssubtype, 0);
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if (VFSATTR_IS_ACTIVE(fsap, f_capabilities)) {
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fsap->f_capabilities.capabilities[VOL_CAPABILITIES_FORMAT] =
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VOL_CAP_FMT_SYMBOLICLINKS |
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VOL_CAP_FMT_HARDLINKS |
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VOL_CAP_FMT_NO_ROOT_TIMES |
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VOL_CAP_FMT_CASE_SENSITIVE |
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VOL_CAP_FMT_CASE_PRESERVING |
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VOL_CAP_FMT_FAST_STATFS |
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VOL_CAP_FMT_2TB_FILESIZE |
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VOL_CAP_FMT_HIDDEN_FILES;
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fsap->f_capabilities.capabilities[VOL_CAPABILITIES_INTERFACES] =
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VOL_CAP_INT_ATTRLIST;
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fsap->f_capabilities.capabilities[VOL_CAPABILITIES_RESERVED1] = 0;
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fsap->f_capabilities.capabilities[VOL_CAPABILITIES_RESERVED2] = 0;
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fsap->f_capabilities.valid[VOL_CAPABILITIES_FORMAT] =
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VOL_CAP_FMT_PERSISTENTOBJECTIDS |
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VOL_CAP_FMT_SYMBOLICLINKS |
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VOL_CAP_FMT_HARDLINKS |
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VOL_CAP_FMT_JOURNAL |
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VOL_CAP_FMT_JOURNAL_ACTIVE |
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VOL_CAP_FMT_NO_ROOT_TIMES |
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VOL_CAP_FMT_SPARSE_FILES |
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VOL_CAP_FMT_ZERO_RUNS |
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VOL_CAP_FMT_CASE_SENSITIVE |
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VOL_CAP_FMT_CASE_PRESERVING |
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VOL_CAP_FMT_FAST_STATFS |
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VOL_CAP_FMT_2TB_FILESIZE |
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VOL_CAP_FMT_OPENDENYMODES |
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VOL_CAP_FMT_HIDDEN_FILES |
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VOL_CAP_FMT_PATH_FROM_ID |
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VOL_CAP_FMT_NO_VOLUME_SIZES;
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fsap->f_capabilities.valid[VOL_CAPABILITIES_INTERFACES] =
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VOL_CAP_INT_SEARCHFS |
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VOL_CAP_INT_ATTRLIST |
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VOL_CAP_INT_NFSEXPORT |
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VOL_CAP_INT_READDIRATTR |
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VOL_CAP_INT_EXCHANGEDATA |
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VOL_CAP_INT_COPYFILE |
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VOL_CAP_INT_ALLOCATE |
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VOL_CAP_INT_VOL_RENAME |
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VOL_CAP_INT_ADVLOCK |
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VOL_CAP_INT_FLOCK |
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VOL_CAP_INT_EXTENDED_SECURITY |
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VOL_CAP_INT_USERACCESS |
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VOL_CAP_INT_MANLOCK |
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VOL_CAP_INT_EXTENDED_ATTR |
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VOL_CAP_INT_NAMEDSTREAMS;
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fsap->f_capabilities.valid[VOL_CAPABILITIES_RESERVED1] = 0;
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fsap->f_capabilities.valid[VOL_CAPABILITIES_RESERVED2] = 0;
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VFSATTR_SET_SUPPORTED(fsap, f_capabilities);
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}
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if (VFSATTR_IS_ACTIVE(fsap, f_attributes)) {
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fsap->f_attributes.validattr.commonattr =
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ATTR_CMN_NAME | ATTR_CMN_DEVID | ATTR_CMN_FSID |
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ATTR_CMN_OBJTYPE | ATTR_CMN_OBJTAG | ATTR_CMN_OBJID |
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ATTR_CMN_PAROBJID |
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ATTR_CMN_MODTIME | ATTR_CMN_CHGTIME | ATTR_CMN_ACCTIME |
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ATTR_CMN_OWNERID | ATTR_CMN_GRPID | ATTR_CMN_ACCESSMASK |
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ATTR_CMN_FLAGS | ATTR_CMN_USERACCESS | ATTR_CMN_FILEID;
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fsap->f_attributes.validattr.volattr =
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ATTR_VOL_FSTYPE | ATTR_VOL_SIZE | ATTR_VOL_SPACEFREE |
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ATTR_VOL_SPACEAVAIL | ATTR_VOL_MINALLOCATION |
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ATTR_VOL_OBJCOUNT | ATTR_VOL_MAXOBJCOUNT |
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ATTR_VOL_MOUNTPOINT | ATTR_VOL_MOUNTFLAGS |
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ATTR_VOL_MOUNTEDDEVICE | ATTR_VOL_CAPABILITIES |
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ATTR_VOL_ATTRIBUTES;
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fsap->f_attributes.validattr.dirattr =
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ATTR_DIR_LINKCOUNT | ATTR_DIR_MOUNTSTATUS;
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fsap->f_attributes.validattr.fileattr =
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ATTR_FILE_LINKCOUNT | ATTR_FILE_TOTALSIZE |
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ATTR_FILE_IOBLOCKSIZE | ATTR_FILE_DEVTYPE |
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ATTR_FILE_DATALENGTH;
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fsap->f_attributes.validattr.forkattr = 0;
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fsap->f_attributes.nativeattr.commonattr =
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ATTR_CMN_NAME | ATTR_CMN_DEVID | ATTR_CMN_FSID |
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ATTR_CMN_OBJTYPE | ATTR_CMN_OBJTAG | ATTR_CMN_OBJID |
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ATTR_CMN_PAROBJID |
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ATTR_CMN_MODTIME | ATTR_CMN_CHGTIME | ATTR_CMN_ACCTIME |
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ATTR_CMN_OWNERID | ATTR_CMN_GRPID | ATTR_CMN_ACCESSMASK |
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ATTR_CMN_FLAGS | ATTR_CMN_USERACCESS | ATTR_CMN_FILEID;
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fsap->f_attributes.nativeattr.volattr =
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ATTR_VOL_FSTYPE | ATTR_VOL_SIZE | ATTR_VOL_SPACEFREE |
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ATTR_VOL_SPACEAVAIL | ATTR_VOL_MINALLOCATION |
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ATTR_VOL_OBJCOUNT | ATTR_VOL_MAXOBJCOUNT |
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ATTR_VOL_MOUNTPOINT | ATTR_VOL_MOUNTFLAGS |
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ATTR_VOL_MOUNTEDDEVICE | ATTR_VOL_CAPABILITIES |
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ATTR_VOL_ATTRIBUTES;
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fsap->f_attributes.nativeattr.dirattr =
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ATTR_DIR_MOUNTSTATUS;
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fsap->f_attributes.nativeattr.fileattr =
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ATTR_FILE_LINKCOUNT | ATTR_FILE_TOTALSIZE |
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ATTR_FILE_IOBLOCKSIZE | ATTR_FILE_DEVTYPE |
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ATTR_FILE_DATALENGTH;
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fsap->f_attributes.nativeattr.forkattr = 0;
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VFSATTR_SET_SUPPORTED(fsap, f_attributes);
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}
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return 0;
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}
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static int
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devfs_sync(__unused struct mount *mp, __unused int waitfor, __unused vfs_context_t ctx)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
devfs_vget(__unused struct mount *mp, __unused ino64_t ino, __unused struct vnode **vpp, __unused vfs_context_t ctx)
|
|
{
|
|
return ENOTSUP;
|
|
}
|
|
|
|
/*************************************************************
|
|
* The concept of exporting a kernel generated devfs is stupid
|
|
* So don't handle filehandles
|
|
*/
|
|
|
|
static int
|
|
devfs_fhtovp(__unused struct mount *mp, __unused int fhlen, __unused unsigned char *fhp, __unused struct vnode **vpp, __unused vfs_context_t ctx)
|
|
{
|
|
return EINVAL;
|
|
}
|
|
|
|
|
|
static int
|
|
devfs_vptofh(__unused struct vnode *vp, __unused int *fhlenp, __unused unsigned char *fhp, __unused vfs_context_t ctx)
|
|
{
|
|
return EINVAL;
|
|
}
|
|
|
|
static int
|
|
devfs_sysctl(__unused int *name, __unused u_int namelen, __unused user_addr_t oldp,
|
|
__unused size_t *oldlenp, __unused user_addr_t newp,
|
|
__unused size_t newlen, __unused vfs_context_t ctx)
|
|
{
|
|
return ENOTSUP;
|
|
}
|
|
|
|
#include <sys/namei.h>
|
|
|
|
/*
|
|
* Function: devfs_kernel_mount
|
|
* Purpose:
|
|
* Mount devfs at the given mount point from within the kernel.
|
|
*/
|
|
int
|
|
devfs_kernel_mount(char * mntname)
|
|
{
|
|
int error;
|
|
vfs_context_t ctx = vfs_context_kernel();
|
|
char fsname[] = "devfs";
|
|
|
|
error = kernel_mount(fsname, NULLVP, NULLVP, mntname, NULL, 0, MNT_DONTBROWSE, KERNEL_MOUNT_NOAUTH | KERNEL_MOUNT_DEVFS, ctx);
|
|
if (error) {
|
|
printf("devfs_kernel_mount: kernel_mount failed: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
const struct vfsops devfs_vfsops = {
|
|
.vfs_mount = devfs_mount,
|
|
.vfs_start = devfs_start,
|
|
.vfs_unmount = devfs_unmount,
|
|
.vfs_root = devfs_root,
|
|
.vfs_getattr = devfs_vfs_getattr,
|
|
.vfs_sync = devfs_sync,
|
|
.vfs_vget = devfs_vget,
|
|
.vfs_fhtovp = devfs_fhtovp,
|
|
.vfs_vptofh = devfs_vptofh,
|
|
.vfs_init = devfs_init,
|
|
.vfs_sysctl = devfs_sysctl,
|
|
// There are other VFS ops that we do not support
|
|
};
|