/*
* 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();
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_LOGD, GID_LOGD, 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.
*/
devfs_mp_p = kalloc_type(struct devfsmount,
Z_WAITOK | Z_ZERO | Z_NOFAIL);
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)VM_KERNEL_ADDRHASH(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;
kfree_type(struct devfsmount, devfs_mp_p);
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();
kfree_type(struct devfsmount, devfs_mp_p);
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)VM_KERNEL_ADDRHASH(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 | 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
};