[apple/xnu.git] / bsd / miscfs / devfs / devfs_vfsops.c

/*
 * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_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_OSREFERENCE_LICENSE_HEADER_END@
 */
/*-
 * Copyright 1997,1998 Julian Elischer.  All rights reserved.
 * julian@freebsd.org
 * 
 * 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.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER ``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 HOLDER 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.
 * 
 * devfs_vfsops.c
 *
 */
/*
 * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
 * support for mandatory and extensible security protections.  This notice
 * is included in support of clause 2.2 (b) of the Apple Public License,
 * Version 2.0.
 */
/*
 * HISTORY
 *  Dieter Siegmund (dieter@apple.com) Wed Jul 14 13:37:59 PDT 1999
 *  - modified devfs_statfs() to use devfs_stats to calculate the
 *    amount of memory used by devfs
 */


#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/vnode_internal.h>
#include <sys/proc.h>
#include <sys/kauth.h>
#include <sys/mount_internal.h>
#include <sys/malloc.h>
#include <sys/conf.h>
#include <libkern/OSAtomic.h>
#include <atm/atm_internal.h>

#if CONFIG_MACF
#include <security/mac_framework.h>
#endif

#include "devfs.h"
#include "devfsdefs.h"

#if FDESC
#include "fdesc.h"
#endif /* FDESC */


static int devfs_statfs( struct mount *mp, struct vfsstatfs *sbp, vfs_context_t ctx);
static int devfs_vfs_getattr(mount_t mp, struct vfs_attr *fsap, vfs_context_t ctx);

#if CONFIG_DEV_KMEM
extern boolean_t dev_kmem_enabled;
#endif

/*-
 * Called from the generic VFS startups.
 * This is the second stage of DEVFS initialisation.
 * The probed devices have already been loaded and the 
 * basic structure of the DEVFS created.
 * We take the oportunity to mount the hidden DEVFS layer, so that
 * devices from devfs get sync'd.
 */
static int
devfs_init(__unused struct vfsconf *vfsp)
{
	if (devfs_sinit())
		return (ENOTSUP);
	devfs_make_node(makedev(0, 0), DEVFS_CHAR, 
					UID_ROOT, GID_WHEEL, 0622, "console");
	devfs_make_node(makedev(2, 0), DEVFS_CHAR, 
					UID_ROOT, GID_WHEEL, 0666, "tty");
#if CONFIG_DEV_KMEM
	if (dev_kmem_enabled) {
		/* (3,0) reserved for /dev/mem physical memory */
		devfs_make_node(makedev(3, 1), DEVFS_CHAR, 
						UID_ROOT, GID_KMEM, 0640, "kmem");
	}
#endif
	devfs_make_node(makedev(3, 2), DEVFS_CHAR, 
					UID_ROOT, GID_WHEEL, 0666, "null");
	devfs_make_node(makedev(3, 3), DEVFS_CHAR, 
					UID_ROOT, GID_WHEEL, 0666, "zero");
	uint32_t logging_config = atm_get_diagnostic_config();

	if ( logging_config & ATM_ENABLE_LEGACY_LOGGING ) {
		devfs_make_node(makedev(6, 0), DEVFS_CHAR,
					UID_ROOT, GID_WHEEL, 0600, "klog");
	}

	if ( !(logging_config & ATM_TRACE_DISABLE) ) {
		devfs_make_node(makedev(7, 0), DEVFS_CHAR,
					UID_ROOT, GID_WHEEL, 0600, "oslog");
		if (cdevsw_setkqueueok(7, (&(cdevsw[7])), 0) == -1) {
			return (ENOTSUP);
		}

		devfs_make_node(makedev(8, 0), DEVFS_CHAR,
					UID_ROOT, GID_WHEEL, 0600, "oslog_stream");
		if (cdevsw_setkqueueok(8, (&(cdevsw[8])), 0) == -1) {
			return (ENOTSUP);
		}
	}


#if  FDESC
	devfs_fdesc_init();
#endif

    return 0;
}

/*-
 *  mp	 - pointer to 'mount' structure
 *  path - addr in user space of mount point (ie /usr or whatever)
 *  data - addr in user space of mount params including the
 *         name of the block special file to treat as a filesystem.
 *         (NOT USED)
 *  ndp  - namei data pointer (NOT USED)
 *  p    - proc pointer
 * devfs is special in that it doesn't require any device to be mounted..
 * It makes up its data as it goes along.
 * it must be mounted during single user.. until it is, only std{in/out/err}
 * and the root filesystem are available.
 */
/*proto*/
int
devfs_mount(struct mount *mp, __unused vnode_t devvp, __unused user_addr_t data, vfs_context_t ctx)
{
	struct devfsmount *devfs_mp_p;	/* devfs specific mount info */
	int error;

	/*-
	 *  If they just want to update, we don't need to do anything.
	 */
	if (mp->mnt_flag & MNT_UPDATE)
	{
		return 0;
	}

	/* Advisory locking should be handled at the VFS layer */
	vfs_setlocklocal(mp);

	/*-
	 *  Well, it's not an update, it's a real mount request.
	 *  Time to get dirty.
	 * HERE we should check to see if we are already mounted here.
	 */

	MALLOC(devfs_mp_p, struct devfsmount *, sizeof(struct devfsmount),
	       M_DEVFSMNT, M_WAITOK);
	if (devfs_mp_p == NULL)
		return (ENOMEM);
	bzero(devfs_mp_p,sizeof(*devfs_mp_p));
	devfs_mp_p->mount = mp;

	/*-
	 *  Fill out some fields
	 */
	__IGNORE_WCASTALIGN(mp->mnt_data = (qaddr_t)devfs_mp_p);
	mp->mnt_vfsstat.f_fsid.val[0] = (int32_t)(uintptr_t)devfs_mp_p;
	mp->mnt_vfsstat.f_fsid.val[1] = vfs_typenum(mp);
	mp->mnt_flag |= MNT_LOCAL;

	DEVFS_LOCK();
	error = dev_dup_plane(devfs_mp_p);
	DEVFS_UNLOCK();

	if (error) {
		mp->mnt_data = (qaddr_t)0;
		FREE((caddr_t)devfs_mp_p, M_DEVFSMNT);
		return (error);
	} else
	        DEVFS_INCR_MOUNTS();

	/*-
	 *  Copy in the name of the directory the filesystem
	 *  is to be mounted on.
	 *  And we clear the remainder of the character strings
	 *  to be tidy.
	 */
	
	bzero(mp->mnt_vfsstat.f_mntfromname, MAXPATHLEN);
	bcopy("devfs",mp->mnt_vfsstat.f_mntfromname, 5);
	(void)devfs_statfs(mp, &mp->mnt_vfsstat, ctx);

	return 0;
}


static int
devfs_start(__unused struct mount *mp, __unused int flags, __unused vfs_context_t ctx)
{
	return 0;
}

/*-
 *  Unmount the filesystem described by mp.
 */
static int
devfs_unmount( struct mount *mp, int mntflags, __unused vfs_context_t ctx)
{
	struct devfsmount *devfs_mp_p = (struct devfsmount *)mp->mnt_data;
	int flags = 0;
	int force = 0;
	int error;
	
	if (mntflags & MNT_FORCE) {
		flags |= FORCECLOSE;
		force = 1;
	}
	error = vflush(mp, NULLVP, flags);
	if (error && !force)
		return error;

	DEVFS_LOCK();
	devfs_free_plane(devfs_mp_p);
	DEVFS_UNLOCK();

	DEVFS_DECR_MOUNTS();

	FREE((caddr_t)devfs_mp_p, M_DEVFSMNT);
	mp->mnt_data = (qaddr_t)0;
	mp->mnt_flag &= ~MNT_LOCAL;

	return 0;
}

/* return the address of the root vnode  in *vpp */
static int
devfs_root(struct mount *mp, struct vnode **vpp, __unused vfs_context_t ctx)
{
	struct devfsmount *devfs_mp_p = (struct devfsmount *)(mp->mnt_data);
	int error;

	DEVFS_LOCK();
	/* last parameter to devfs_dntovn() is ignored */
	error = devfs_dntovn(devfs_mp_p->plane_root->de_dnp, vpp, NULL);
	DEVFS_UNLOCK();

	return error;
}

static int
devfs_statfs( struct mount *mp, struct vfsstatfs *sbp, __unused vfs_context_t ctx)
{
	struct devfsmount *devfs_mp_p = (struct devfsmount *)mp->mnt_data;

	/*-
	 *  Fill in the stat block.
	 */
	//sbp->f_type   = mp->mnt_vfsstat.f_type;
	sbp->f_flags  = 0;		/* XXX */
	sbp->f_bsize  = 512;
	sbp->f_iosize = 512;
	sbp->f_blocks = (devfs_stats.mounts * sizeof(struct devfsmount)
			 + devfs_stats.nodes * sizeof(devnode_t)
			 + devfs_stats.entries * sizeof(devdirent_t)
			 + devfs_stats.stringspace
			 ) / sbp->f_bsize;
	sbp->f_bfree  = 0;
	sbp->f_bavail = 0;
	sbp->f_files  = devfs_stats.nodes;
	sbp->f_ffree  = 0;
	sbp->f_fsid.val[0] = (int32_t)(uintptr_t)devfs_mp_p;
	sbp->f_fsid.val[1] = vfs_typenum(mp);

	return 0;
}

static int
devfs_vfs_getattr(__unused mount_t mp, struct vfs_attr *fsap, __unused vfs_context_t ctx)
{
	VFSATTR_RETURN(fsap, f_objcount, devfs_stats.nodes);
	VFSATTR_RETURN(fsap, f_maxobjcount, devfs_stats.nodes);
	VFSATTR_RETURN(fsap, f_bsize, 512);
	VFSATTR_RETURN(fsap, f_iosize, 512);
	if (VFSATTR_IS_ACTIVE(fsap, f_blocks) || VFSATTR_IS_ACTIVE(fsap, f_bused)) {
		fsap->f_blocks = (devfs_stats.mounts * sizeof(struct devfsmount)
			 + devfs_stats.nodes * sizeof(devnode_t)
			 + devfs_stats.entries * sizeof(devdirent_t)
			 + devfs_stats.stringspace
			 ) / fsap->f_bsize;
		fsap->f_bused = fsap->f_blocks;
		VFSATTR_SET_SUPPORTED(fsap, f_blocks);
		VFSATTR_SET_SUPPORTED(fsap, f_bused);
	}
	VFSATTR_RETURN(fsap, f_bfree, 0);
	VFSATTR_RETURN(fsap, f_bavail, 0);
	VFSATTR_RETURN(fsap, f_files, devfs_stats.nodes);
	VFSATTR_RETURN(fsap, f_ffree, 0);
	VFSATTR_RETURN(fsap, f_fssubtype, 0);
	
	if (VFSATTR_IS_ACTIVE(fsap, f_capabilities)) {
		fsap->f_capabilities.capabilities[VOL_CAPABILITIES_FORMAT] =
			VOL_CAP_FMT_SYMBOLICLINKS |
			VOL_CAP_FMT_HARDLINKS |
			VOL_CAP_FMT_NO_ROOT_TIMES |
			VOL_CAP_FMT_CASE_SENSITIVE |
			VOL_CAP_FMT_CASE_PRESERVING |
			VOL_CAP_FMT_FAST_STATFS |
			VOL_CAP_FMT_2TB_FILESIZE |
			VOL_CAP_FMT_HIDDEN_FILES;
		fsap->f_capabilities.capabilities[VOL_CAPABILITIES_INTERFACES] =
			VOL_CAP_INT_ATTRLIST ;
		fsap->f_capabilities.capabilities[VOL_CAPABILITIES_RESERVED1] = 0;
		fsap->f_capabilities.capabilities[VOL_CAPABILITIES_RESERVED2] = 0;
		
		fsap->f_capabilities.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 |
			VOL_CAP_FMT_OPENDENYMODES |
			VOL_CAP_FMT_HIDDEN_FILES |
			VOL_CAP_FMT_PATH_FROM_ID |
			VOL_CAP_FMT_NO_VOLUME_SIZES;
		fsap->f_capabilities.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 |
			VOL_CAP_INT_EXTENDED_SECURITY |
			VOL_CAP_INT_USERACCESS |
			VOL_CAP_INT_MANLOCK |
			VOL_CAP_INT_EXTENDED_ATTR |
			VOL_CAP_INT_NAMEDSTREAMS;
		fsap->f_capabilities.valid[VOL_CAPABILITIES_RESERVED1] = 0;
		fsap->f_capabilities.valid[VOL_CAPABILITIES_RESERVED2] = 0;
		
		VFSATTR_SET_SUPPORTED(fsap, f_capabilities);
	}
	
	if (VFSATTR_IS_ACTIVE(fsap, f_attributes)) {
		fsap->f_attributes.validattr.commonattr =
			ATTR_CMN_NAME | ATTR_CMN_DEVID | ATTR_CMN_FSID |
			ATTR_CMN_OBJTYPE | ATTR_CMN_OBJTAG | ATTR_CMN_OBJID |
			ATTR_CMN_PAROBJID |
			ATTR_CMN_MODTIME | ATTR_CMN_CHGTIME | ATTR_CMN_ACCTIME |
			ATTR_CMN_OWNERID | ATTR_CMN_GRPID | ATTR_CMN_ACCESSMASK |
			ATTR_CMN_FLAGS | ATTR_CMN_USERACCESS | ATTR_CMN_FILEID;
		fsap->f_attributes.validattr.volattr =
			ATTR_VOL_FSTYPE | ATTR_VOL_SIZE | ATTR_VOL_SPACEFREE |
			ATTR_VOL_SPACEAVAIL | ATTR_VOL_MINALLOCATION |
			ATTR_VOL_OBJCOUNT | ATTR_VOL_MAXOBJCOUNT |
			ATTR_VOL_MOUNTPOINT | ATTR_VOL_MOUNTFLAGS |
			ATTR_VOL_MOUNTEDDEVICE | ATTR_VOL_CAPABILITIES |
			ATTR_VOL_ATTRIBUTES;
		fsap->f_attributes.validattr.dirattr =
			ATTR_DIR_LINKCOUNT | ATTR_DIR_MOUNTSTATUS;
		fsap->f_attributes.validattr.fileattr =
			ATTR_FILE_LINKCOUNT | ATTR_FILE_TOTALSIZE |
			ATTR_FILE_IOBLOCKSIZE | ATTR_FILE_DEVTYPE |
			ATTR_FILE_DATALENGTH;
		fsap->f_attributes.validattr.forkattr = 0;
		
		fsap->f_attributes.nativeattr.commonattr =
			ATTR_CMN_NAME | ATTR_CMN_DEVID | ATTR_CMN_FSID |
			ATTR_CMN_OBJTYPE | ATTR_CMN_OBJTAG | ATTR_CMN_OBJID |
			ATTR_CMN_PAROBJID |
			ATTR_CMN_MODTIME | ATTR_CMN_CHGTIME | ATTR_CMN_ACCTIME |
			ATTR_CMN_OWNERID | ATTR_CMN_GRPID | ATTR_CMN_ACCESSMASK |
			ATTR_CMN_FLAGS | ATTR_CMN_USERACCESS | ATTR_CMN_FILEID;
		fsap->f_attributes.nativeattr.volattr =
			ATTR_VOL_FSTYPE | ATTR_VOL_SIZE | ATTR_VOL_SPACEFREE |
			ATTR_VOL_SPACEAVAIL | ATTR_VOL_MINALLOCATION |
			ATTR_VOL_OBJCOUNT | ATTR_VOL_MAXOBJCOUNT |
			ATTR_VOL_MOUNTPOINT | ATTR_VOL_MOUNTFLAGS |
			ATTR_VOL_MOUNTEDDEVICE | ATTR_VOL_CAPABILITIES |
			ATTR_VOL_ATTRIBUTES;
		fsap->f_attributes.nativeattr.dirattr =
			ATTR_DIR_MOUNTSTATUS;
		fsap->f_attributes.nativeattr.fileattr =
			ATTR_FILE_LINKCOUNT | ATTR_FILE_TOTALSIZE |
			ATTR_FILE_IOBLOCKSIZE | ATTR_FILE_DEVTYPE |
			ATTR_FILE_DATALENGTH;
		fsap->f_attributes.nativeattr.forkattr = 0;

		VFSATTR_SET_SUPPORTED(fsap, f_attributes);
	}
	
	return 0;
}

static int
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, ctx);
	if (error) {
		printf("devfs_kernel_mount: kernel_mount failed: %d\n", error);
		return (error);
	}

	return (0);
}

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
};
Commit	Line	Data
1c79356b	1	/*
6d2010ae	2	* Copyright (c) 2000-2010 Apple Inc. All rights reserved.
5d5c5d0d	3	*
2d21ac55	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
2d21ac55 A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
8f6c56a5	14	*
2d21ac55 A	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
8f6c56a5 A	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
2d21ac55 A	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
8f6c56a5	25	*
2d21ac55	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
	28	/*-
	29	* Copyright 1997,1998 Julian Elischer. All rights reserved.
	30	* julian@freebsd.org
	31	*
	32	* Redistribution and use in source and binary forms, with or without
	33	* modification, are permitted provided that the following conditions are
	34	* met:
	35	* 1. Redistributions of source code must retain the above copyright
	36	* notice, this list of conditions and the following disclaimer.
	37	* 2. Redistributions in binary form must reproduce the above copyright notice,
	38	* this list of conditions and the following disclaimer in the documentation
	39	* and/or other materials provided with the distribution.
	40	*
	41	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER ``AS IS'' AND ANY EXPRESS
	42	* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
	43	* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	44	* DISCLAIMED. IN NO EVENT SHALL THE HOLDER OR CONTRIBUTORS BE LIABLE FOR
	45	* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	46	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
	47	* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
	48	* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	49	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	50	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	51	* SUCH DAMAGE.
	52	*
	53	* devfs_vfsops.c
	54	*
	55	*/
2d21ac55 A	56	/*
	57	* NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
	58	* support for mandatory and extensible security protections. This notice
	59	* is included in support of clause 2.2 (b) of the Apple Public License,
	60	* Version 2.0.
	61	*/
1c79356b A	62	/*
	63	* HISTORY
	64	* Dieter Siegmund (dieter@apple.com) Wed Jul 14 13:37:59 PDT 1999
	65	* - modified devfs_statfs() to use devfs_stats to calculate the
	66	* amount of memory used by devfs
	67	*/
	68
	69
	70	#include <sys/param.h>
	71	#include <sys/systm.h>
	72	#include <sys/kernel.h>
91447636	73	#include <sys/vnode_internal.h>
1c79356b	74	#include <sys/proc.h>
91447636 A	75	#include <sys/kauth.h>
91447636 A	76	#include <sys/mount_internal.h>
1c79356b	77	#include <sys/malloc.h>
39037602	78	#include <sys/conf.h>
2d21ac55	79	#include <libkern/OSAtomic.h>
39037602	80	#include <atm/atm_internal.h>
2d21ac55 A	81
	82	#if CONFIG_MACF
	83	#include <security/mac_framework.h>
	84	#endif
	85
1c79356b A	86	#include "devfs.h"
	87	#include "devfsdefs.h"
	88
b0d623f7 A	89	#if FDESC
	90	#include "fdesc.h"
	91	#endif /* FDESC */
	92
	93
2d21ac55 A	94	static int devfs_statfs( struct mount mp, struct vfsstatfs sbp, vfs_context_t ctx);
2d21ac55 A	95	static int devfs_vfs_getattr(mount_t mp, struct vfs_attr *fsap, vfs_context_t ctx);
1c79356b	96
fe8ab488 A	97	#if CONFIG_DEV_KMEM
fe8ab488 A	98	extern boolean_t dev_kmem_enabled;
6d2010ae	99	#endif
1c79356b A	100
	101	/*-
	102	* Called from the generic VFS startups.
	103	* This is the second stage of DEVFS initialisation.
	104	* The probed devices have already been loaded and the
	105	* basic structure of the DEVFS created.
	106	* We take the oportunity to mount the hidden DEVFS layer, so that
	107	* devices from devfs get sync'd.
	108	*/
	109	static int
b0d623f7	110	devfs_init(__unused struct vfsconf *vfsp)
1c79356b	111	{
fe8ab488 A	112	if (devfs_sinit())
	113	return (ENOTSUP);
	114	devfs_make_node(makedev(0, 0), DEVFS_CHAR,
	115	UID_ROOT, GID_WHEEL, 0622, "console");
	116	devfs_make_node(makedev(2, 0), DEVFS_CHAR,
	117	UID_ROOT, GID_WHEEL, 0666, "tty");
	118	#if CONFIG_DEV_KMEM
	119	if (dev_kmem_enabled) {
	120	/* (3,0) reserved for /dev/mem physical memory */
	121	devfs_make_node(makedev(3, 1), DEVFS_CHAR,
	122	UID_ROOT, GID_KMEM, 0640, "kmem");
	123	}
6d2010ae	124	#endif
fe8ab488 A	125	devfs_make_node(makedev(3, 2), DEVFS_CHAR,
	126	UID_ROOT, GID_WHEEL, 0666, "null");
	127	devfs_make_node(makedev(3, 3), DEVFS_CHAR,
	128	UID_ROOT, GID_WHEEL, 0666, "zero");
39037602 A	129	uint32_t logging_config = atm_get_diagnostic_config();
	130
	131	if ( logging_config & ATM_ENABLE_LEGACY_LOGGING ) {
	132	devfs_make_node(makedev(6, 0), DEVFS_CHAR,
fe8ab488	133	UID_ROOT, GID_WHEEL, 0600, "klog");
39037602 A	134	}
	135
	136	if ( !(logging_config & ATM_TRACE_DISABLE) ) {
	137	devfs_make_node(makedev(7, 0), DEVFS_CHAR,
	138	UID_ROOT, GID_WHEEL, 0600, "oslog");
	139	if (cdevsw_setkqueueok(7, (&(cdevsw[7])), 0) == -1) {
	140	return (ENOTSUP);
	141	}
	142
	143	devfs_make_node(makedev(8, 0), DEVFS_CHAR,
	144	UID_ROOT, GID_WHEEL, 0600, "oslog_stream");
	145	if (cdevsw_setkqueueok(8, (&(cdevsw[8])), 0) == -1) {
	146	return (ENOTSUP);
	147	}
	148	}
	149
b0d623f7 A	150
b0d623f7 A	151	#if FDESC
fe8ab488	152	devfs_fdesc_init();
b0d623f7 A	153	#endif
b0d623f7 A	154
1c79356b A	155	return 0;
	156	}
	157
	158	/*-
	159	* mp - pointer to 'mount' structure
	160	* path - addr in user space of mount point (ie /usr or whatever)
	161	* data - addr in user space of mount params including the
	162	* name of the block special file to treat as a filesystem.
	163	* (NOT USED)
	164	* ndp - namei data pointer (NOT USED)
	165	* p - proc pointer
	166	* devfs is special in that it doesn't require any device to be mounted..
	167	* It makes up its data as it goes along.
	168	* it must be mounted during single user.. until it is, only std{in/out/err}
	169	* and the root filesystem are available.
	170	*/
	171	/proto/
	172	int
2d21ac55	173	devfs_mount(struct mount *mp, __unused vnode_t devvp, __unused user_addr_t data, vfs_context_t ctx)
1c79356b A	174	{
	175	struct devfsmount devfs_mp_p; / devfs specific mount info */
	176	int error;
1c79356b A	177
	178	/*-
	179	* If they just want to update, we don't need to do anything.
	180	*/
	181	if (mp->mnt_flag & MNT_UPDATE)
	182	{
	183	return 0;
	184	}
	185
91447636 A	186	/* Advisory locking should be handled at the VFS layer */
	187	vfs_setlocklocal(mp);
	188
1c79356b A	189	/*-
	190	* Well, it's not an update, it's a real mount request.
	191	* Time to get dirty.
	192	* HERE we should check to see if we are already mounted here.
	193	*/
	194
	195	MALLOC(devfs_mp_p, struct devfsmount *, sizeof(struct devfsmount),
	196	M_DEVFSMNT, M_WAITOK);
	197	if (devfs_mp_p == NULL)
	198	return (ENOMEM);
	199	bzero(devfs_mp_p,sizeof(*devfs_mp_p));
	200	devfs_mp_p->mount = mp;
	201
	202	/*-
	203	* Fill out some fields
	204	*/
3e170ce0	205	__IGNORE_WCASTALIGN(mp->mnt_data = (qaddr_t)devfs_mp_p);
b0d623f7	206	mp->mnt_vfsstat.f_fsid.val[0] = (int32_t)(uintptr_t)devfs_mp_p;
91447636	207	mp->mnt_vfsstat.f_fsid.val[1] = vfs_typenum(mp);
1c79356b A	208	mp->mnt_flag \|= MNT_LOCAL;
1c79356b A	209
91447636	210	DEVFS_LOCK();
1c79356b	211	error = dev_dup_plane(devfs_mp_p);
91447636 A	212	DEVFS_UNLOCK();
91447636 A	213
1c79356b A	214	if (error) {
	215	mp->mnt_data = (qaddr_t)0;
	216	FREE((caddr_t)devfs_mp_p, M_DEVFSMNT);
	217	return (error);
91447636 A	218	} else
91447636 A	219	DEVFS_INCR_MOUNTS();
1c79356b A	220
	221	/*-
	222	* Copy in the name of the directory the filesystem
	223	* is to be mounted on.
	224	* And we clear the remainder of the character strings
	225	* to be tidy.
	226	*/
	227
91447636 A	228	bzero(mp->mnt_vfsstat.f_mntfromname, MAXPATHLEN);
91447636 A	229	bcopy("devfs",mp->mnt_vfsstat.f_mntfromname, 5);
2d21ac55	230	(void)devfs_statfs(mp, &mp->mnt_vfsstat, ctx);
91447636	231
1c79356b A	232	return 0;
	233	}
	234
	235
	236	static int
2d21ac55	237	devfs_start(__unused struct mount *mp, __unused int flags, __unused vfs_context_t ctx)
1c79356b A	238	{
	239	return 0;
	240	}
	241
	242	/*-
	243	* Unmount the filesystem described by mp.
	244	*/
	245	static int
2d21ac55	246	devfs_unmount( struct mount *mp, int mntflags, __unused vfs_context_t ctx)
1c79356b A	247	{
	248	struct devfsmount devfs_mp_p = (struct devfsmount )mp->mnt_data;
	249	int flags = 0;
9bccf70c	250	int force = 0;
1c79356b A	251	int error;
	252
	253	if (mntflags & MNT_FORCE) {
	254	flags \|= FORCECLOSE;
9bccf70c	255	force = 1;
1c79356b A	256	}
1c79356b A	257	error = vflush(mp, NULLVP, flags);
9bccf70c	258	if (error && !force)
1c79356b A	259	return error;
1c79356b A	260
91447636	261	DEVFS_LOCK();
1c79356b	262	devfs_free_plane(devfs_mp_p);
91447636 A	263	DEVFS_UNLOCK();
91447636 A	264
1c79356b	265	DEVFS_DECR_MOUNTS();
91447636 A	266
91447636 A	267	FREE((caddr_t)devfs_mp_p, M_DEVFSMNT);
1c79356b A	268	mp->mnt_data = (qaddr_t)0;
	269	mp->mnt_flag &= ~MNT_LOCAL;
	270
	271	return 0;
	272	}
	273
	274	/* return the address of the root vnode in vpp /
	275	static int
2d21ac55	276	devfs_root(struct mount mp, struct vnode *vpp, __unused vfs_context_t ctx)
1c79356b A	277	{
	278	struct devfsmount devfs_mp_p = (struct devfsmount )(mp->mnt_data);
	279	int error;
	280
91447636	281	DEVFS_LOCK();
2d21ac55 A	282	/* last parameter to devfs_dntovn() is ignored */
2d21ac55 A	283	error = devfs_dntovn(devfs_mp_p->plane_root->de_dnp, vpp, NULL);
91447636	284	DEVFS_UNLOCK();
1c79356b	285
91447636	286	return error;
1c79356b A	287	}
	288
	289	static int
2d21ac55	290	devfs_statfs( struct mount mp, struct vfsstatfs sbp, __unused vfs_context_t ctx)
1c79356b A	291	{
	292	struct devfsmount devfs_mp_p = (struct devfsmount )mp->mnt_data;
	293
	294	/*-
	295	* Fill in the stat block.
	296	*/
91447636	297	//sbp->f_type = mp->mnt_vfsstat.f_type;
1c79356b A	298	sbp->f_flags = 0; /* XXX */
	299	sbp->f_bsize = 512;
	300	sbp->f_iosize = 512;
	301	sbp->f_blocks = (devfs_stats.mounts * sizeof(struct devfsmount)
	302	+ devfs_stats.nodes * sizeof(devnode_t)
	303	+ devfs_stats.entries * sizeof(devdirent_t)
	304	+ devfs_stats.stringspace
	305	) / sbp->f_bsize;
	306	sbp->f_bfree = 0;
	307	sbp->f_bavail = 0;
	308	sbp->f_files = devfs_stats.nodes;
	309	sbp->f_ffree = 0;
b0d623f7	310	sbp->f_fsid.val[0] = (int32_t)(uintptr_t)devfs_mp_p;
91447636	311	sbp->f_fsid.val[1] = vfs_typenum(mp);
1c79356b	312
91447636 A	313	return 0;
	314	}
	315
	316	static int
2d21ac55	317	devfs_vfs_getattr(__unused mount_t mp, struct vfs_attr *fsap, __unused vfs_context_t ctx)
91447636 A	318	{
	319	VFSATTR_RETURN(fsap, f_objcount, devfs_stats.nodes);
	320	VFSATTR_RETURN(fsap, f_maxobjcount, devfs_stats.nodes);
	321	VFSATTR_RETURN(fsap, f_bsize, 512);
	322	VFSATTR_RETURN(fsap, f_iosize, 512);
	323	if (VFSATTR_IS_ACTIVE(fsap, f_blocks) \|\| VFSATTR_IS_ACTIVE(fsap, f_bused)) {
	324	fsap->f_blocks = (devfs_stats.mounts * sizeof(struct devfsmount)
	325	+ devfs_stats.nodes * sizeof(devnode_t)
	326	+ devfs_stats.entries * sizeof(devdirent_t)
	327	+ devfs_stats.stringspace
	328	) / fsap->f_bsize;
	329	fsap->f_bused = fsap->f_blocks;
	330	VFSATTR_SET_SUPPORTED(fsap, f_blocks);
	331	VFSATTR_SET_SUPPORTED(fsap, f_bused);
1c79356b	332	}
91447636 A	333	VFSATTR_RETURN(fsap, f_bfree, 0);
	334	VFSATTR_RETURN(fsap, f_bavail, 0);
	335	VFSATTR_RETURN(fsap, f_files, devfs_stats.nodes);
	336	VFSATTR_RETURN(fsap, f_ffree, 0);
	337	VFSATTR_RETURN(fsap, f_fssubtype, 0);
	338
b0d623f7 A	339	if (VFSATTR_IS_ACTIVE(fsap, f_capabilities)) {
	340	fsap->f_capabilities.capabilities[VOL_CAPABILITIES_FORMAT] =
	341	VOL_CAP_FMT_SYMBOLICLINKS \|
	342	VOL_CAP_FMT_HARDLINKS \|
	343	VOL_CAP_FMT_NO_ROOT_TIMES \|
	344	VOL_CAP_FMT_CASE_SENSITIVE \|
	345	VOL_CAP_FMT_CASE_PRESERVING \|
	346	VOL_CAP_FMT_FAST_STATFS \|
	347	VOL_CAP_FMT_2TB_FILESIZE \|
	348	VOL_CAP_FMT_HIDDEN_FILES;
	349	fsap->f_capabilities.capabilities[VOL_CAPABILITIES_INTERFACES] =
	350	VOL_CAP_INT_ATTRLIST ;
	351	fsap->f_capabilities.capabilities[VOL_CAPABILITIES_RESERVED1] = 0;
	352	fsap->f_capabilities.capabilities[VOL_CAPABILITIES_RESERVED2] = 0;
	353
	354	fsap->f_capabilities.valid[VOL_CAPABILITIES_FORMAT] =
	355	VOL_CAP_FMT_PERSISTENTOBJECTIDS \|
	356	VOL_CAP_FMT_SYMBOLICLINKS \|
	357	VOL_CAP_FMT_HARDLINKS \|
	358	VOL_CAP_FMT_JOURNAL \|
	359	VOL_CAP_FMT_JOURNAL_ACTIVE \|
	360	VOL_CAP_FMT_NO_ROOT_TIMES \|
	361	VOL_CAP_FMT_SPARSE_FILES \|
	362	VOL_CAP_FMT_ZERO_RUNS \|
	363	VOL_CAP_FMT_CASE_SENSITIVE \|
	364	VOL_CAP_FMT_CASE_PRESERVING \|
	365	VOL_CAP_FMT_FAST_STATFS \|
	366	VOL_CAP_FMT_2TB_FILESIZE \|
	367	VOL_CAP_FMT_OPENDENYMODES \|
	368	VOL_CAP_FMT_HIDDEN_FILES \|
	369	VOL_CAP_FMT_PATH_FROM_ID \|
	370	VOL_CAP_FMT_NO_VOLUME_SIZES;
	371	fsap->f_capabilities.valid[VOL_CAPABILITIES_INTERFACES] =
	372	VOL_CAP_INT_SEARCHFS \|
	373	VOL_CAP_INT_ATTRLIST \|
	374	VOL_CAP_INT_NFSEXPORT \|
	375	VOL_CAP_INT_READDIRATTR \|
	376	VOL_CAP_INT_EXCHANGEDATA \|
	377	VOL_CAP_INT_COPYFILE \|
	378	VOL_CAP_INT_ALLOCATE \|
	379	VOL_CAP_INT_VOL_RENAME \|
	380	VOL_CAP_INT_ADVLOCK \|
	381	VOL_CAP_INT_FLOCK \|
	382	VOL_CAP_INT_EXTENDED_SECURITY \|
	383	VOL_CAP_INT_USERACCESS \|
	384	VOL_CAP_INT_MANLOCK \|
	385	VOL_CAP_INT_EXTENDED_ATTR \|
	386	VOL_CAP_INT_NAMEDSTREAMS;
	387	fsap->f_capabilities.valid[VOL_CAPABILITIES_RESERVED1] = 0;
	388	fsap->f_capabilities.valid[VOL_CAPABILITIES_RESERVED2] = 0;
	389
	390	VFSATTR_SET_SUPPORTED(fsap, f_capabilities);
	391	}
	392
	393	if (VFSATTR_IS_ACTIVE(fsap, f_attributes)) {
	394	fsap->f_attributes.validattr.commonattr =
	395	ATTR_CMN_NAME \| ATTR_CMN_DEVID \| ATTR_CMN_FSID \|
	396	ATTR_CMN_OBJTYPE \| ATTR_CMN_OBJTAG \| ATTR_CMN_OBJID \|
	397	ATTR_CMN_PAROBJID \|
	398	ATTR_CMN_MODTIME \| ATTR_CMN_CHGTIME \| ATTR_CMN_ACCTIME \|
	399	ATTR_CMN_OWNERID \| ATTR_CMN_GRPID \| ATTR_CMN_ACCESSMASK \|
	400	ATTR_CMN_FLAGS \| ATTR_CMN_USERACCESS \| ATTR_CMN_FILEID;
	401	fsap->f_attributes.validattr.volattr =
	402	ATTR_VOL_FSTYPE \| ATTR_VOL_SIZE \| ATTR_VOL_SPACEFREE \|
403	ATTR_VOL_SPACEAVAIL \| ATTR_VOL_MINALLOCATION \|
404	ATTR_VOL_OBJCOUNT \| ATTR_VOL_MAXOBJCOUNT \|
405	ATTR_VOL_MOUNTPOINT \| ATTR_VOL_MOUNTFLAGS \|
406	ATTR_VOL_MOUNTEDDEVICE \| ATTR_VOL_CAPABILITIES \|
407	ATTR_VOL_ATTRIBUTES;
408	fsap->f_attributes.validattr.dirattr =
409	ATTR_DIR_LINKCOUNT \| ATTR_DIR_MOUNTSTATUS;
410	fsap->f_attributes.validattr.fileattr =
411	ATTR_FILE_LINKCOUNT \| ATTR_FILE_TOTALSIZE \|
412	ATTR_FILE_IOBLOCKSIZE \| ATTR_FILE_DEVTYPE \|
413	ATTR_FILE_DATALENGTH;
414	fsap->f_attributes.validattr.forkattr = 0;
415
416	fsap->f_attributes.nativeattr.commonattr =
417	ATTR_CMN_NAME \| ATTR_CMN_DEVID \| ATTR_CMN_FSID \|
418	ATTR_CMN_OBJTYPE \| ATTR_CMN_OBJTAG \| ATTR_CMN_OBJID \|
419	ATTR_CMN_PAROBJID \|
420	ATTR_CMN_MODTIME \| ATTR_CMN_CHGTIME \| ATTR_CMN_ACCTIME \|
421	ATTR_CMN_OWNERID \| ATTR_CMN_GRPID \| ATTR_CMN_ACCESSMASK \|
422	ATTR_CMN_FLAGS \| ATTR_CMN_USERACCESS \| ATTR_CMN_FILEID;
423	fsap->f_attributes.nativeattr.volattr =
424	ATTR_VOL_FSTYPE \| ATTR_VOL_SIZE \| ATTR_VOL_SPACEFREE \|
425	ATTR_VOL_SPACEAVAIL \| ATTR_VOL_MINALLOCATION \|
426	ATTR_VOL_OBJCOUNT \| ATTR_VOL_MAXOBJCOUNT \|
427	ATTR_VOL_MOUNTPOINT \| ATTR_VOL_MOUNTFLAGS \|
428	ATTR_VOL_MOUNTEDDEVICE \| ATTR_VOL_CAPABILITIES \|
429	ATTR_VOL_ATTRIBUTES;
430	fsap->f_attributes.nativeattr.dirattr =
431	ATTR_DIR_MOUNTSTATUS;
432	fsap->f_attributes.nativeattr.fileattr =
433	ATTR_FILE_LINKCOUNT \| ATTR_FILE_TOTALSIZE \|
434	ATTR_FILE_IOBLOCKSIZE \| ATTR_FILE_DEVTYPE \|
435	ATTR_FILE_DATALENGTH;
436	fsap->f_attributes.nativeattr.forkattr = 0;
437
438	VFSATTR_SET_SUPPORTED(fsap, f_attributes);
439	}
440
1c79356b A	441	return 0;
	442	}
	443
	444	static int
2d21ac55	445	devfs_sync(__unused struct mount *mp, __unused int waitfor, __unused vfs_context_t ctx)
1c79356b A	446	{
	447	return (0);
	448	}
	449
	450
	451	static int
2d21ac55	452	devfs_vget(__unused struct mount mp, __unused ino64_t ino, __unused struct vnode *vpp, __unused vfs_context_t ctx)
1c79356b	453	{
91447636	454	return ENOTSUP;
1c79356b A	455	}
	456
	457	/*************************************************************
	458	* The concept of exporting a kernel generated devfs is stupid
	459	* So don't handle filehandles
	460	*/
	461
	462	static int
2d21ac55	463	devfs_fhtovp (__unused struct mount mp, __unused int fhlen, __unused unsigned char fhp, __unused struct vnode **vpp, __unused vfs_context_t ctx)
1c79356b A	464	{
	465	return (EINVAL);
	466	}
	467
	468
	469	static int
2d21ac55	470	devfs_vptofh (__unused struct vnode vp, __unused int fhlenp, __unused unsigned char *fhp, __unused vfs_context_t ctx)
1c79356b A	471	{
	472	return (EINVAL);
	473	}
	474
	475	static int
91447636 A	476	devfs_sysctl(__unused int *name, __unused u_int namelen, __unused user_addr_t oldp,
91447636 A	477	__unused size_t *oldlenp, __unused user_addr_t newp,
2d21ac55	478	__unused size_t newlen, __unused vfs_context_t ctx)
1c79356b	479	{
91447636	480	return (ENOTSUP);
1c79356b A	481	}
	482
	483	#include <sys/namei.h>
	484
	485	/*
	486	* Function: devfs_kernel_mount
	487	* Purpose:
	488	* Mount devfs at the given mount point from within the kernel.
	489	*/
	490	int
	491	devfs_kernel_mount(char * mntname)
	492	{
1c79356b	493	int error;
2d21ac55	494	vfs_context_t ctx = vfs_context_kernel();
fe8ab488	495	char fsname[] = "devfs";
1c79356b	496
fe8ab488	497	error = kernel_mount(fsname, NULLVP, NULLVP, mntname, NULL, 0, MNT_DONTBROWSE, KERNEL_MOUNT_NOAUTH, ctx);
1c79356b	498	if (error) {
fe8ab488 A	499	printf("devfs_kernel_mount: kernel_mount failed: %d\n", error);
fe8ab488 A	500	return (error);
1c79356b	501	}
fe8ab488	502
1c79356b A	503	return (0);
	504	}
	505
	506	struct vfsops devfs_vfsops = {
39037602 A	507	.vfs_mount = devfs_mount,
	508	.vfs_start = devfs_start,
	509	.vfs_unmount = devfs_unmount,
	510	.vfs_root = devfs_root,
	511	.vfs_getattr = devfs_vfs_getattr,
	512	.vfs_sync = devfs_sync,
	513	.vfs_vget = devfs_vget,
	514	.vfs_fhtovp = devfs_fhtovp,
	515	.vfs_vptofh = devfs_vptofh,
	516	.vfs_init = devfs_init,
	517	.vfs_sysctl = devfs_sysctl,
	518	// There are other VFS ops that we do not support
1c79356b	519	};