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gems-kernel/source/THIRDPARTY/xnu/bsd/miscfs/devfs/devfs_vnops.c
Sam Sneed f5727805f2 add darwin/xnu functionality
2024-06-03 11:29:39 -05:00

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/*
* Copyright (c) 2000-2019 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_vnops.c
*/
/*
* HISTORY
* Clark Warner (warner_c@apple.com) Tue Feb 10 2000
* - Added err_copyfile to the vnode operations table
* Dieter Siegmund (dieter@apple.com) Thu Apr 8 14:08:19 PDT 1999
* - instead of duplicating specfs here, created a vnode-ops table
* that redirects most operations to specfs (as is done with ufs);
* - removed routines that made no sense
* - cleaned up reclaim: replaced devfs_vntodn() with a macro VTODN()
* - cleaned up symlink, link locking
* - added the devfs_lock to protect devfs data structures against
* driver's calling devfs_add_devswf()/etc.
* Dieter Siegmund (dieter@apple.com) Wed Jul 14 13:37:59 PDT 1999
* - free the devfs devnode in devfs_inactive(), not just in devfs_reclaim()
* to free up kernel memory as soon as it's available
* - got rid of devfsspec_{read, write}
* Dieter Siegmund (dieter@apple.com) Fri Sep 17 09:58:38 PDT 1999
* - update the mod/access times
*/
/*
* 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.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/kernel.h>
#include <sys/fcntl.h>
#include <sys/conf.h>
#include <sys/disklabel.h>
#include <sys/lock.h>
#include <sys/stat.h>
#include <sys/mount_internal.h>
#include <sys/proc.h>
#include <sys/kauth.h>
#include <sys/time.h>
#include <sys/vnode_internal.h>
#include <miscfs/specfs/specdev.h>
#include <sys/dirent.h>
#include <sys/vmmeter.h>
#include <sys/vm.h>
#include <sys/uio_internal.h>
#if CONFIG_MACF
#include <security/mac_framework.h>
#endif
#include "devfsdefs.h"
#include "devfs.h"
#if FDESC
#include "fdesc.h"
#endif /* FDESC */
static int devfs_update(struct vnode *vp, struct timeval *access,
struct timeval *modify);
void devfs_rele_node(devnode_t *);
static void devfs_consider_time_update(devnode_t *dnp, uint32_t just_changed_flags);
static boolean_t devfs_update_needed(long now_s, long last_s);
static boolean_t devfs_is_name_protected(struct vnode *dvp, const char *name);
void dn_times_locked(devnode_t * dnp, struct timeval *t1, struct timeval *t2, struct timeval *t3, uint32_t just_changed_flags);
void dn_times_now(devnode_t *dnp, uint32_t just_changed_flags);
void dn_mark_for_delayed_times_update(devnode_t *dnp, uint32_t just_changed_flags);
void
dn_times_locked(devnode_t * dnp, struct timeval *t1, struct timeval *t2, struct timeval *t3, uint32_t just_changed_flags)
{
lck_mtx_assert(&devfs_attr_mutex, LCK_MTX_ASSERT_OWNED);
if (just_changed_flags & DEVFS_UPDATE_ACCESS) {
dnp->dn_atime.tv_sec = t1->tv_sec;
dnp->dn_atime.tv_nsec = t1->tv_usec * 1000;
dnp->dn_access = 0;
} else if (dnp->dn_access) {
dnp->dn_atime.tv_sec = MIN(t1->tv_sec, dnp->dn_atime.tv_sec + DEVFS_LAZY_UPDATE_SECONDS);
dnp->dn_atime.tv_nsec = t1->tv_usec * 1000;
dnp->dn_access = 0;
}
if (just_changed_flags & DEVFS_UPDATE_MOD) {
dnp->dn_mtime.tv_sec = t2->tv_sec;
dnp->dn_mtime.tv_nsec = t2->tv_usec * 1000;
dnp->dn_update = 0;
} else if (dnp->dn_update) {
dnp->dn_mtime.tv_sec = MIN(t2->tv_sec, dnp->dn_mtime.tv_sec + DEVFS_LAZY_UPDATE_SECONDS);
dnp->dn_mtime.tv_nsec = t2->tv_usec * 1000;
dnp->dn_update = 0;
}
if (just_changed_flags & DEVFS_UPDATE_CHANGE) {
dnp->dn_ctime.tv_sec = t3->tv_sec;
dnp->dn_ctime.tv_nsec = t3->tv_usec * 1000;
dnp->dn_change = 0;
} else if (dnp->dn_change) {
dnp->dn_ctime.tv_sec = MIN(t3->tv_sec, dnp->dn_ctime.tv_sec + DEVFS_LAZY_UPDATE_SECONDS);
dnp->dn_ctime.tv_nsec = t3->tv_usec * 1000;
dnp->dn_change = 0;
}
}
void
dn_mark_for_delayed_times_update(devnode_t *dnp, uint32_t just_changed_flags)
{
if (just_changed_flags & DEVFS_UPDATE_CHANGE) {
dnp->dn_change = 1;
}
if (just_changed_flags & DEVFS_UPDATE_ACCESS) {
dnp->dn_access = 1;
}
if (just_changed_flags & DEVFS_UPDATE_MOD) {
dnp->dn_update = 1;
}
}
/*
* Update times based on pending updates and optionally a set of new changes.
*/
void
dn_times_now(devnode_t * dnp, uint32_t just_changed_flags)
{
struct timeval now;
DEVFS_ATTR_LOCK_SPIN();
microtime(&now);
dn_times_locked(dnp, &now, &now, &now, just_changed_flags);
DEVFS_ATTR_UNLOCK();
}
/*
* Critical devfs devices cannot be renamed or removed.
* However, links to them may be moved/unlinked. So we block
* remove/rename on a per-name basis, rather than per-node.
*/
static boolean_t
devfs_is_name_protected(struct vnode *dvp, const char *name)
{
/*
* Only names in root are protected. E.g. /dev/null is protected,
* but /dev/foo/null isn't.
*/
if (!vnode_isvroot(dvp)) {
return FALSE;
}
if ((strcmp("console", name) == 0) ||
(strcmp("tty", name) == 0) ||
(strcmp("null", name) == 0) ||
(strcmp("zero", name) == 0) ||
(strcmp("klog", name) == 0)) {
return TRUE;
}
return FALSE;
}
/*
* Convert a component of a pathname into a pointer to a locked node.
* This is a very central and rather complicated routine.
* If the file system is not maintained in a strict tree hierarchy,
* this can result in a deadlock situation (see comments in code below).
*
* The flag argument is LOOKUP, CREATE, RENAME, or DELETE depending on
* whether the name is to be looked up, created, renamed, or deleted.
* When CREATE, RENAME, or DELETE is specified, information usable in
* creating, renaming, or deleting a directory entry may be calculated.
* If flag has LOCKPARENT or'ed into it and the target of the pathname
* exists, lookup returns both the target and its parent directory locked.
* When creating or renaming and LOCKPARENT is specified, the target may
* not be ".". When deleting and LOCKPARENT is specified, the target may
* be "."., but the caller must check to ensure it does an vrele and DNUNLOCK
* instead of two DNUNLOCKs.
*
* Overall outline of devfs_lookup:
*
* check accessibility of directory
* null terminate the component (lookup leaves the whole string alone)
* look for name in cache, if found, then if at end of path
* and deleting or creating, drop it, else return name
* search for name in directory, to found or notfound
* notfound:
* if creating, return locked directory,
* else return error
* found:
* if at end of path and deleting, return information to allow delete
* if at end of path and rewriting (RENAME and LOCKPARENT), lock target
* node and return info to allow rewrite
* if not at end, add name to cache; if at end and neither creating
* nor deleting, add name to cache
* On return to lookup, remove the null termination we put in at the start.
*
* NOTE: (LOOKUP | LOCKPARENT) currently returns the parent node unlocked.
*/
static int
devfs_lookup(struct vnop_lookup_args *ap)
/*struct vnop_lookup_args {
* struct vnode * a_dvp; directory vnode ptr
* struct vnode ** a_vpp; where to put the result
* struct componentname * a_cnp; the name we want
* vfs_context_t a_context;
* };*/
{
struct componentname *cnp = ap->a_cnp;
vfs_context_t ctx = cnp->cn_context;
struct proc *p = vfs_context_proc(ctx);
struct vnode *dir_vnode = ap->a_dvp;
struct vnode **result_vnode = ap->a_vpp;
devnode_t * dir_node; /* the directory we are searching */
devnode_t * node = NULL; /* the node we are searching for */
devdirent_t * nodename;
int flags = cnp->cn_flags;
int op = cnp->cn_nameiop; /* LOOKUP, CREATE, RENAME, or DELETE */
int wantparent = flags & (LOCKPARENT | WANTPARENT);
int error = 0;
char heldchar; /* the char at the end of the name componet */
retry:
*result_vnode = NULL; /* safe not sorry */ /*XXX*/
/* okay to look at directory vnodes ourside devfs lock as they are not aliased */
dir_node = VTODN(dir_vnode);
/*
* Make sure that our node is a directory as well.
*/
if (dir_node->dn_type != DEV_DIR) {
return ENOTDIR;
}
DEVFS_LOCK();
/*
* temporarily terminate string component
*/
heldchar = cnp->cn_nameptr[cnp->cn_namelen];
cnp->cn_nameptr[cnp->cn_namelen] = '\0';
nodename = dev_findname(dir_node, cnp->cn_nameptr);
/*
* restore saved character
*/
cnp->cn_nameptr[cnp->cn_namelen] = heldchar;
if (nodename) {
/* entry exists */
node = nodename->de_dnp;
/* Do potential vnode allocation here inside the lock
* to make sure that our device node has a non-NULL dn_vn
* associated with it. The device node might otherwise
* get deleted out from under us (see devfs_dn_free()).
*/
error = devfs_dntovn(node, result_vnode, p);
}
DEVFS_UNLOCK();
if (error) {
if (error == EAGAIN) {
goto retry;
}
return error;
}
if (!nodename) {
/*
* we haven't called devfs_dntovn if we get here
* we have not taken a reference on the node.. no
* vnode_put is necessary on these error returns
*
* If it doesn't exist and we're not the last component,
* or we're at the last component, but we're not creating
* or renaming, return ENOENT.
*/
if (!(flags & ISLASTCN) || !(op == CREATE || op == RENAME)) {
return ENOENT;
}
/*
* We return with the directory locked, so that
* the parameters we set up above will still be
* valid if we actually decide to add a new entry.
* We return ni_vp == NULL to indicate that the entry
* does not currently exist; we leave a pointer to
* the (locked) directory vnode in namei_data->ni_dvp.
*
* NB - if the directory is unlocked, then this
* information cannot be used.
*/
return EJUSTRETURN;
}
/*
* from this point forward, we need to vnode_put the reference
* picked up in devfs_dntovn if we decide to return an error
*/
/*
* If deleting, and at end of pathname, return
* parameters which can be used to remove file.
* If the wantparent flag isn't set, we return only
* the directory (in namei_data->ni_dvp), otherwise we go
* on and lock the node, being careful with ".".
*/
if (op == DELETE && (flags & ISLASTCN)) {
/*
* we are trying to delete '.'. What does this mean? XXX
*/
if (dir_node == node) {
if (*result_vnode) {
vnode_put(*result_vnode);
*result_vnode = NULL;
}
if (((error = vnode_get(dir_vnode)) == 0)) {
*result_vnode = dir_vnode;
}
return error;
}
return 0;
}
/*
* If rewriting (RENAME), return the vnode and the
* information required to rewrite the present directory
* Must get node of directory entry to verify it's a
* regular file, or empty directory.
*/
if (op == RENAME && wantparent && (flags & ISLASTCN)) {
/*
* Careful about locking second node.
* This can only occur if the target is ".".
*/
if (dir_node == node) {
error = EISDIR;
goto drop_ref;
}
return 0;
}
/*
* Step through the translation in the name. We do not unlock the
* directory because we may need it again if a symbolic link
* is relative to the current directory. Instead we save it
* unlocked as "saved_dir_node" XXX. We must get the target
* node before unlocking
* the directory to insure that the node will not be removed
* before we get it. We prevent deadlock by always fetching
* nodes from the root, moving down the directory tree. Thus
* when following backward pointers ".." we must unlock the
* parent directory before getting the requested directory.
* There is a potential race condition here if both the current
* and parent directories are removed before the lock for the
* node associated with ".." returns. We hope that this occurs
* infrequently since we cannot avoid this race condition without
* implementing a sophisticated deadlock detection algorithm.
* Note also that this simple deadlock detection scheme will not
* work if the file system has any hard links other than ".."
* that point backwards in the directory structure.
*/
if ((flags & ISDOTDOT) == 0 && dir_node == node) {
if (*result_vnode) {
vnode_put(*result_vnode);
*result_vnode = NULL;
}
if ((error = vnode_get(dir_vnode))) {
return error;
}
*result_vnode = dir_vnode;
}
return 0;
drop_ref:
if (*result_vnode) {
vnode_put(*result_vnode);
*result_vnode = NULL;
}
return error;
}
static int
devfs_getattr(struct vnop_getattr_args *ap)
/*struct vnop_getattr_args {
* struct vnode *a_vp;
* struct vnode_attr *a_vap;
* kauth_cred_t a_cred;
* struct proc *a_p;
* } */
{
struct vnode *vp = ap->a_vp;
struct vnode_attr *vap = ap->a_vap;
devnode_t * file_node;
struct timeval now;
DEVFS_LOCK();
file_node = VTODN(vp);
VATTR_RETURN(vap, va_mode, file_node->dn_mode);
/*
* Note: for DEV_CDEV and DEV_BDEV, we return the device from
* the vp, not the file_node; if we getting information on a
* cloning device, we want the cloned information, not the template.
*/
switch (file_node->dn_type) {
case DEV_DIR:
#if FDESC
case DEV_DEVFD: /* Like a directory */
#endif /* FDESC */
VATTR_RETURN(vap, va_rdev, 0);
vap->va_mode |= (S_IFDIR);
break;
case DEV_CDEV:
VATTR_RETURN(vap, va_rdev, vp->v_rdev);
vap->va_mode |= (S_IFCHR);
break;
case DEV_BDEV:
VATTR_RETURN(vap, va_rdev, vp->v_rdev);
vap->va_mode |= (S_IFBLK);
break;
case DEV_SLNK:
VATTR_RETURN(vap, va_rdev, 0);
vap->va_mode |= (S_IFLNK);
break;
default:
VATTR_RETURN(vap, va_rdev, 0); /* default value only */
}
VATTR_RETURN(vap, va_type, vp->v_type);
VATTR_RETURN(vap, va_nlink, file_node->dn_links);
VATTR_RETURN(vap, va_uid, file_node->dn_uid);
VATTR_RETURN(vap, va_gid, file_node->dn_gid);
VATTR_RETURN(vap, va_fsid, (uint32_t)VM_KERNEL_ADDRHASH(file_node->dn_dvm));
VATTR_RETURN(vap, va_fileid, (uintptr_t)file_node->dn_ino);
VATTR_RETURN(vap, va_data_size, file_node->dn_len);
/* return an override block size (advisory) */
if (vp->v_type == VBLK) {
VATTR_RETURN(vap, va_iosize, BLKDEV_IOSIZE);
} else if (vp->v_type == VCHR) {
VATTR_RETURN(vap, va_iosize, MAXPHYSIO);
} else {
VATTR_RETURN(vap, va_iosize, (uint32_t)vp->v_mount->mnt_vfsstat.f_iosize);
}
DEVFS_ATTR_LOCK_SPIN();
microtime(&now);
dn_times_locked(file_node, &now, &now, &now, 0);
/* if the time is bogus, set it to the boot time */
if (file_node->dn_ctime.tv_sec == 0) {
file_node->dn_ctime.tv_sec = boottime_sec();
file_node->dn_ctime.tv_nsec = 0;
}
if (file_node->dn_mtime.tv_sec == 0) {
file_node->dn_mtime = file_node->dn_ctime;
}
if (file_node->dn_atime.tv_sec == 0) {
file_node->dn_atime = file_node->dn_ctime;
}
VATTR_RETURN(vap, va_change_time, file_node->dn_ctime);
VATTR_RETURN(vap, va_modify_time, file_node->dn_mtime);
VATTR_RETURN(vap, va_access_time, file_node->dn_atime);
DEVFS_ATTR_UNLOCK();
VATTR_RETURN(vap, va_gen, 0);
VATTR_RETURN(vap, va_filerev, 0);
VATTR_RETURN(vap, va_acl, NULL);
/* Hide the root so Finder doesn't display it */
if (vnode_isvroot(vp)) {
VATTR_RETURN(vap, va_flags, UF_HIDDEN);
} else {
VATTR_RETURN(vap, va_flags, 0);
}
DEVFS_UNLOCK();
return 0;
}
static int
devfs_setattr(struct vnop_setattr_args *ap)
/*struct vnop_setattr_args {
* struct vnode *a_vp;
* struct vnode_attr *a_vap;
* vfs_context_t a_context;
* } */
{
struct vnode *vp = ap->a_vp;
struct vnode_attr *vap = ap->a_vap;
int error = 0;
devnode_t * file_node;
struct timeval atimeval, mtimeval;
DEVFS_LOCK();
file_node = VTODN(vp);
/*
* Go through the fields and update if set.
*/
if (VATTR_IS_ACTIVE(vap, va_access_time) || VATTR_IS_ACTIVE(vap, va_modify_time)) {
if (VATTR_IS_ACTIVE(vap, va_access_time)) {
file_node->dn_access = 1;
}
if (VATTR_IS_ACTIVE(vap, va_modify_time)) {
file_node->dn_change = 1;
file_node->dn_update = 1;
}
atimeval.tv_sec = vap->va_access_time.tv_sec;
atimeval.tv_usec = (suseconds_t)(vap->va_access_time.tv_nsec / 1000);
mtimeval.tv_sec = vap->va_modify_time.tv_sec;
mtimeval.tv_usec = (suseconds_t)(vap->va_modify_time.tv_nsec / 1000);
if ((error = devfs_update(vp, &atimeval, &mtimeval))) {
goto exit;
}
}
VATTR_SET_SUPPORTED(vap, va_access_time);
VATTR_SET_SUPPORTED(vap, va_change_time);
/*
* Change the permissions.
*/
if (VATTR_IS_ACTIVE(vap, va_mode)) {
file_node->dn_mode &= ~07777;
file_node->dn_mode |= vap->va_mode & 07777;
}
VATTR_SET_SUPPORTED(vap, va_mode);
/*
* Change the owner.
*/
if (VATTR_IS_ACTIVE(vap, va_uid)) {
file_node->dn_uid = vap->va_uid;
}
VATTR_SET_SUPPORTED(vap, va_uid);
/*
* Change the group.
*/
if (VATTR_IS_ACTIVE(vap, va_gid)) {
file_node->dn_gid = vap->va_gid;
}
VATTR_SET_SUPPORTED(vap, va_gid);
exit:
DEVFS_UNLOCK();
return error;
}
#if CONFIG_MACF
static int
devfs_setlabel(struct vnop_setlabel_args *ap)
/* struct vnop_setlabel_args {
* struct vnodeop_desc *a_desc;
* struct vnode *a_vp;
* struct label *a_vl;
* vfs_context_t a_context;
* } */
{
struct vnode *vp;
struct devnode *de;
vp = ap->a_vp;
de = VTODN(vp);
mac_vnode_label_update(ap->a_context, vp, ap->a_vl);
mac_devfs_label_update(vp->v_mount, de, vp);
return 0;
}
#endif
static int
devfs_read(struct vnop_read_args *ap)
/* struct vnop_read_args {
* struct vnode *a_vp;
* struct uio *a_uio;
* int a_ioflag;
* vfs_context_t a_context;
* } */
{
devnode_t * dn_p = VTODN(ap->a_vp);
switch (ap->a_vp->v_type) {
case VDIR: {
dn_p->dn_access = 1;
return VNOP_READDIR(ap->a_vp, ap->a_uio, 0, NULL, NULL, ap->a_context);
}
default: {
printf("devfs_read(): bad file type %d", ap->a_vp->v_type);
return EINVAL;
}
}
}
static int
devfs_close(struct vnop_close_args *ap)
/* struct vnop_close_args {
* struct vnode *a_vp;
* int a_fflag;
* vfs_context_t a_context;
* } */
{
struct vnode * vp = ap->a_vp;
devnode_t * dnp;
if (vnode_isinuse(vp, 1)) {
DEVFS_LOCK();
dnp = VTODN(vp);
if (dnp) {
dn_times_now(dnp, 0);
}
DEVFS_UNLOCK();
}
return 0;
}
static int
devfsspec_close(struct vnop_close_args *ap)
/* struct vnop_close_args {
* struct vnode *a_vp;
* int a_fflag;
* vfs_context_t a_context;
* } */
{
struct vnode * vp = ap->a_vp;
devnode_t * dnp;
if (vnode_isinuse(vp, 0)) {
DEVFS_LOCK();
dnp = VTODN(vp);
if (dnp) {
dn_times_now(dnp, 0);
}
DEVFS_UNLOCK();
}
return VOCALL(spec_vnodeop_p, VOFFSET(vnop_close), ap);
}
static boolean_t
devfs_update_needed(long now_s, long last_s)
{
if (now_s > last_s) {
if (now_s - last_s >= DEVFS_LAZY_UPDATE_SECONDS) {
return TRUE;
}
}
return FALSE;
}
/*
* Given a set of time updates required [to happen at some point], check
* either make those changes (and resolve other pending updates) or mark
* the devnode for a subsequent update.
*/
static void
devfs_consider_time_update(devnode_t *dnp, uint32_t just_changed_flags)
{
struct timeval now;
long now_s;
microtime(&now);
now_s = now.tv_sec;
if (dnp->dn_change || (just_changed_flags & DEVFS_UPDATE_CHANGE)) {
if (devfs_update_needed(now_s, dnp->dn_ctime.tv_sec)) {
dn_times_now(dnp, just_changed_flags);
return;
}
}
if (dnp->dn_access || (just_changed_flags & DEVFS_UPDATE_ACCESS)) {
if (devfs_update_needed(now_s, dnp->dn_atime.tv_sec)) {
dn_times_now(dnp, just_changed_flags);
return;
}
}
if (dnp->dn_update || (just_changed_flags & DEVFS_UPDATE_MOD)) {
if (devfs_update_needed(now_s, dnp->dn_mtime.tv_sec)) {
dn_times_now(dnp, just_changed_flags);
return;
}
}
/* Not going to do anything now--mark for later update */
dn_mark_for_delayed_times_update(dnp, just_changed_flags);
return;
}
static int
devfsspec_read(struct vnop_read_args *ap)
/* struct vnop_read_args {
* struct vnode *a_vp;
* struct uio *a_uio;
* int a_ioflag;
* kauth_cred_t a_cred;
* } */
{
devnode_t * dnp = VTODN(ap->a_vp);
devfs_consider_time_update(dnp, DEVFS_UPDATE_ACCESS);
return VOCALL(spec_vnodeop_p, VOFFSET(vnop_read), ap);
}
static int
devfsspec_write(struct vnop_write_args *ap)
/* struct vnop_write_args {
* struct vnode *a_vp;
* struct uio *a_uio;
* int a_ioflag;
* vfs_context_t a_context;
* } */
{
devnode_t * dnp = VTODN(ap->a_vp);
devfs_consider_time_update(dnp, DEVFS_UPDATE_CHANGE | DEVFS_UPDATE_MOD);
return VOCALL(spec_vnodeop_p, VOFFSET(vnop_write), ap);
}
/*
* Write data to a file or directory.
*/
static int
devfs_write(struct vnop_write_args *ap)
/* struct vnop_write_args {
* struct vnode *a_vp;
* struct uio *a_uio;
* int a_ioflag;
* kauth_cred_t a_cred;
* } */
{
switch (ap->a_vp->v_type) {
case VDIR:
return EISDIR;
default:
printf("devfs_write(): bad file type %d", ap->a_vp->v_type);
return EINVAL;
}
}
/*
* Deviates from UFS naming convention because there is a KPI function
* called devfs_remove().
*/
static int
devfs_vnop_remove(struct vnop_remove_args *ap)
/* struct vnop_remove_args {
* struct vnode *a_dvp;
* struct vnode *a_vp;
* struct componentname *a_cnp;
* } */
{
struct vnode *vp = ap->a_vp;
struct vnode *dvp = ap->a_dvp;
struct componentname *cnp = ap->a_cnp;
devnode_t * tp;
devnode_t * tdp;
devdirent_t * tnp;
int doingdirectory = 0;
int error = 0;
/*
* assume that the name is null terminated as they
* are the end of the path. Get pointers to all our
* devfs structures.
*/
DEVFS_LOCK();
tp = VTODN(vp);
tdp = VTODN(dvp);
tnp = dev_findname(tdp, cnp->cn_nameptr);
if (tnp == NULL) {
error = ENOENT;
goto abort;
}
/*
* Don't allow removing critical devfs devices
*/
if (devfs_is_name_protected(dvp, cnp->cn_nameptr)) {
error = EINVAL;
goto abort;
}
/*
* Make sure that we don't try do something stupid
*/
if ((tp->dn_type) == DEV_DIR) {
/*
* Avoid ".", "..", and aliases of "." for obvious reasons.
*/
if ((cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.')
|| (cnp->cn_flags & ISDOTDOT)) {
error = EINVAL;
goto abort;
}
doingdirectory++;
}
/***********************************
* Start actually doing things.... *
***********************************/
devfs_consider_time_update(tdp, DEVFS_UPDATE_CHANGE | DEVFS_UPDATE_MOD);
/*
* Target must be empty if a directory and have no links
* to it. Also, ensure source and target are compatible
* (both directories, or both not directories).
*/
if ((doingdirectory) && (tp->dn_links > 2)) {
error = ENOTEMPTY;
goto abort;
}
dev_free_name(tnp);
abort:
DEVFS_UNLOCK();
return error;
}
/*
*/
static int
devfs_link(struct vnop_link_args *ap)
/*struct vnop_link_args {
* struct vnode *a_tdvp;
* struct vnode *a_vp;
* struct componentname *a_cnp;
* vfs_context_t a_context;
* } */
{
struct vnode *vp = ap->a_vp;
struct vnode *tdvp = ap->a_tdvp;
struct componentname *cnp = ap->a_cnp;
devnode_t * fp;
devnode_t * tdp;
devdirent_t * tnp;
int error = 0;
/*
* First catch an arbitrary restriction for this FS
*/
if (cnp->cn_namelen > DEVMAXNAMESIZE) {
error = ENAMETOOLONG;
goto out1;
}
/*
* Lock our directories and get our name pointers
* assume that the names are null terminated as they
* are the end of the path. Get pointers to all our
* devfs structures.
*/
/* can lookup dnode safely for tdvp outside of devfs lock as it is not aliased */
tdp = VTODN(tdvp);
if (tdvp->v_mount != vp->v_mount) {
return EXDEV;
}
DEVFS_LOCK();
fp = VTODN(vp);
/***********************************
* Start actually doing things.... *
***********************************/
dn_times_now(fp, DEVFS_UPDATE_CHANGE);
if (!error) {
error = dev_add_name(cnp->cn_nameptr, tdp, NULL, fp, &tnp);
}
out1:
DEVFS_UNLOCK();
return error;
}
/*
* Rename system call. Seems overly complicated to me...
* rename("foo", "bar");
* is essentially
* unlink("bar");
* link("foo", "bar");
* unlink("foo");
* but ``atomically''.
*
* When the target exists, both the directory
* and target vnodes are locked.
* the source and source-parent vnodes are referenced
*
*
* Basic algorithm is:
*
* 1) Bump link count on source while we're linking it to the
* target. This also ensure the inode won't be deleted out
* from underneath us while we work (it may be truncated by
* a concurrent `trunc' or `open' for creation).
* 2) Link source to destination. If destination already exists,
* delete it first.
* 3) Unlink source reference to node if still around. If a
* directory was moved and the parent of the destination
* is different from the source, patch the ".." entry in the
* directory.
*/
static int
devfs_rename(struct vnop_rename_args *ap)
/*struct vnop_rename_args {
* struct vnode *a_fdvp;
* struct vnode *a_fvp;
* struct componentname *a_fcnp;
* struct vnode *a_tdvp;
* struct vnode *a_tvp;
* struct componentname *a_tcnp;
* vfs_context_t a_context;
* } */
{
struct vnode *tvp = ap->a_tvp;
struct vnode *tdvp = ap->a_tdvp;
struct vnode *fvp = ap->a_fvp;
struct vnode *fdvp = ap->a_fdvp;
struct componentname *tcnp = ap->a_tcnp;
struct componentname *fcnp = ap->a_fcnp;
devnode_t *fp, *fdp, *tp, *tdp;
devdirent_t *fnp, *tnp;
int doingdirectory = 0;
int error = 0;
DEVFS_LOCK();
/*
* First catch an arbitrary restriction for this FS
*/
if (tcnp->cn_namelen > DEVMAXNAMESIZE) {
error = ENAMETOOLONG;
goto out;
}
/*
* assume that the names are null terminated as they
* are the end of the path. Get pointers to all our
* devfs structures.
*/
tdp = VTODN(tdvp);
fdp = VTODN(fdvp);
fp = VTODN(fvp);
fnp = dev_findname(fdp, fcnp->cn_nameptr);
if (fnp == NULL) {
error = ENOENT;
goto out;
}
tp = NULL;
tnp = NULL;
if (tvp) {
tnp = dev_findname(tdp, tcnp->cn_nameptr);
if (tnp == NULL) {
error = ENOENT;
goto out;
}
tp = VTODN(tvp);
}
/*
* Make sure that we don't try do something stupid
*/
if ((fp->dn_type) == DEV_DIR) {
/*
* Avoid ".", "..", and aliases of "." for obvious reasons.
*/
if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.')
|| (fcnp->cn_flags & ISDOTDOT)
|| (tcnp->cn_namelen == 1 && tcnp->cn_nameptr[0] == '.')
|| (tcnp->cn_flags & ISDOTDOT)
|| (tdp == fp)) {
error = EINVAL;
goto out;
}
doingdirectory++;
}
/*
* Don't allow renaming critical devfs devices
*/
if (devfs_is_name_protected(fdvp, fcnp->cn_nameptr) ||
devfs_is_name_protected(tdvp, tcnp->cn_nameptr)) {
error = EINVAL;
goto out;
}
/*
* If ".." must be changed (ie the directory gets a new
* parent) then the source directory must not be in the
* directory hierarchy above the target, as this would
* orphan everything below the source directory. Also
* the user must have write permission in the source so
* as to be able to change "..".
*/
if (doingdirectory && (tdp != fdp)) {
devnode_t * tmp, *ntmp;
tmp = tdp;
do {
if (tmp == fp) {
/* XXX unlock stuff here probably */
error = EINVAL;
goto out;
}
ntmp = tmp;
} while ((tmp = tmp->dn_typeinfo.Dir.parent) != ntmp);
}
/***********************************
* Start actually doing things.... *
***********************************/
dn_times_now(fp, DEVFS_UPDATE_CHANGE);
/*
* Check if just deleting a link name.
*/
if (fvp == tvp) {
if (fvp->v_type == VDIR) {
error = EINVAL;
goto out;
}
/* Release destination completely. */
dev_free_name(fnp);
DEVFS_UNLOCK();
return 0;
}
/*
* 1) Bump link count while we're moving stuff
* around. If we crash somewhere before
* completing our work, too bad :)
*/
fp->dn_links++;
/*
* If the target exists zap it (unless it's a non-empty directory)
* We could do that as well but won't
*/
if (tp) {
/*
* Target must be empty if a directory and have no links
* to it. Also, ensure source and target are compatible
* (both directories, or both not directories).
*/
if ((doingdirectory) && (tp->dn_links > 2)) {
error = ENOTEMPTY;
goto bad;
}
dev_free_name(tnp);
tp = NULL;
}
dev_add_name(tcnp->cn_nameptr, tdp, NULL, fp, &tnp);
fnp->de_dnp = NULL;
fp->dn_links--; /* one less link to it.. */
dev_free_name(fnp);
bad:
fp->dn_links--; /* we added one earlier*/
out:
DEVFS_UNLOCK();
return error;
}
static int
devfs_mkdir(struct vnop_mkdir_args *ap)
/*struct vnop_mkdir_args {
* struct vnode *a_dvp;
* struct vnode **a_vpp;
* struct componentname *a_cnp;
* struct vnode_attr *a_vap;
* vfs_context_t a_context;
* } */
{
struct componentname * cnp = ap->a_cnp;
vfs_context_t ctx = cnp->cn_context;
struct proc *p = vfs_context_proc(ctx);
int error = 0;
devnode_t * dir_p;
devdirent_t * nm_p;
devnode_t * dev_p;
struct vnode_attr * vap = ap->a_vap;
struct vnode * * vpp = ap->a_vpp;
DEVFS_LOCK();
dir_p = VTODN(ap->a_dvp);
error = dev_add_entry(cnp->cn_nameptr, dir_p, DEV_DIR,
NULL, NULL, NULL, &nm_p);
if (error) {
goto failure;
}
dev_p = nm_p->de_dnp;
dev_p->dn_uid = dir_p->dn_uid;
dev_p->dn_gid = dir_p->dn_gid;
dev_p->dn_mode = vap->va_mode;
dn_copy_times(dev_p, dir_p);
error = devfs_dntovn(dev_p, vpp, p);
failure:
DEVFS_UNLOCK();
return error;
}
/*
* An rmdir is a special type of remove, which we already support; we wrap
* and reexpress the arguments to call devfs_remove directly. The only
* different argument is flags, which we do not set, since it's ignored.
*/
static int
devfs_rmdir(struct vnop_rmdir_args *ap)
/* struct vnop_rmdir_args {
* struct vnode *a_dvp;
* struct vnode *a_vp;
* struct componentname *a_cnp;
* vfs_context_t a_context;
* } */
{
struct vnop_remove_args ra;
ra.a_dvp = ap->a_dvp;
ra.a_vp = ap->a_vp;
ra.a_cnp = ap->a_cnp;
ra.a_flags = 0; /* XXX */
ra.a_context = ap->a_context;
return devfs_vnop_remove(&ra);
}
static int
devfs_symlink(struct vnop_symlink_args *ap)
/*struct vnop_symlink_args {
* struct vnode *a_dvp;
* struct vnode **a_vpp;
* struct componentname *a_cnp;
* struct vnode_attr *a_vap;
* char *a_target;
* vfs_context_t a_context;
* } */
{
int error;
devdirent_t *newent;
DEVFS_LOCK();
error = devfs_make_symlink(VTODN(ap->a_dvp), ap->a_cnp->cn_nameptr, ap->a_vap->va_mode, ap->a_target, &newent);
if (error == 0) {
error = devfs_dntovn(newent->de_dnp, ap->a_vpp, vfs_context_proc(ap->a_context));
}
DEVFS_UNLOCK();
return error;
}
/* Called with devfs locked */
int
devfs_make_symlink(devnode_t *dir_p, char *name, mode_t mode, char *target, devdirent_t **newent)
{
int error = 0;
devnode_type_t typeinfo;
devdirent_t * nm_p;
devnode_t * dev_p;
typeinfo.Slnk.name = target;
typeinfo.Slnk.namelen = strlen(target);
error = dev_add_entry(name, dir_p, DEV_SLNK,
&typeinfo, NULL, NULL, &nm_p);
if (error) {
goto failure;
}
dev_p = nm_p->de_dnp;
dev_p->dn_uid = dir_p->dn_uid;
dev_p->dn_gid = dir_p->dn_gid;
dev_p->dn_mode = mode;
dn_copy_times(dev_p, dir_p);
if (newent) {
*newent = nm_p;
}
failure:
return error;
}
/*
* Mknod vnode call
*/
static int
devfs_mknod(struct vnop_mknod_args *ap)
/* struct vnop_mknod_args {
* struct vnode *a_dvp;
* struct vnode **a_vpp;
* struct componentname *a_cnp;
* struct vnode_attr *a_vap;
* vfs_context_t a_context;
* } */
{
struct componentname * cnp = ap->a_cnp;
vfs_context_t ctx = cnp->cn_context;
struct proc *p = vfs_context_proc(ctx);
devnode_t * dev_p;
devdirent_t * devent;
devnode_t * dir_p; /* devnode for parent directory */
struct vnode * dvp = ap->a_dvp;
int error = 0;
devnode_type_t typeinfo;
struct vnode_attr * vap = ap->a_vap;
struct vnode ** vpp = ap->a_vpp;
*vpp = NULL;
if (!(vap->va_type == VBLK) && !(vap->va_type == VCHR)) {
return EINVAL; /* only support mknod of special files */
}
typeinfo.dev = vap->va_rdev;
DEVFS_LOCK();
dir_p = VTODN(dvp);
error = dev_add_entry(cnp->cn_nameptr, dir_p,
(vap->va_type == VBLK) ? DEV_BDEV : DEV_CDEV,
&typeinfo, NULL, NULL, &devent);
if (error) {
goto failure;
}
dev_p = devent->de_dnp;
error = devfs_dntovn(dev_p, vpp, p);
if (error) {
goto failure;
}
dev_p->dn_uid = vap->va_uid;
dev_p->dn_gid = vap->va_gid;
dev_p->dn_mode = vap->va_mode;
VATTR_SET_SUPPORTED(vap, va_uid);
VATTR_SET_SUPPORTED(vap, va_gid);
VATTR_SET_SUPPORTED(vap, va_mode);
failure:
DEVFS_UNLOCK();
return error;
}
/*
* Vnode op for readdir
*/
static int
devfs_readdir(struct vnop_readdir_args *ap)
/*struct vnop_readdir_args {
* struct vnode *a_vp;
* struct uio *a_uio;
* int a_flags;
* int *a_eofflag;
* int *a_numdirent;
* vfs_context_t a_context;
* } */
{
struct vnode *vp = ap->a_vp;
struct uio *uio = ap->a_uio;
struct dirent dirent;
devnode_t * dir_node;
devdirent_t * name_node;
const char *name;
int error = 0;
int reclen;
int nodenumber;
off_t startpos, pos;
if (ap->a_flags & (VNODE_READDIR_EXTENDED | VNODE_READDIR_REQSEEKOFF)) {
return EINVAL;
}
/* set up refs to dir */
dir_node = VTODN(vp);
if (dir_node->dn_type != DEV_DIR) {
return ENOTDIR;
}
pos = 0;
startpos = uio->uio_offset;
DEVFS_LOCK();
name_node = dir_node->dn_typeinfo.Dir.dirlist;
nodenumber = 0;
while ((name_node || (nodenumber < 2)) && (uio_resid(uio) > 0)) {
switch (nodenumber) {
case 0:
dirent.d_fileno = dir_node->dn_ino;
name = ".";
dirent.d_namlen = 1;
dirent.d_type = DT_DIR;
break;
case 1:
if (dir_node->dn_typeinfo.Dir.parent) {
dirent.d_fileno = dir_node->dn_typeinfo.Dir.parent->dn_ino;
} else {
dirent.d_fileno = dir_node->dn_ino;
}
name = "..";
dirent.d_namlen = 2;
dirent.d_type = DT_DIR;
break;
default:
dirent.d_fileno = name_node->de_dnp->dn_ino;
dirent.d_namlen = (__uint8_t) strlen(name_node->de_name);
name = name_node->de_name;
switch (name_node->de_dnp->dn_type) {
case DEV_BDEV:
dirent.d_type = DT_BLK;
break;
case DEV_CDEV:
dirent.d_type = DT_CHR;
break;
case DEV_DIR:
dirent.d_type = DT_DIR;
break;
case DEV_SLNK:
dirent.d_type = DT_LNK;
break;
default:
dirent.d_type = DT_UNKNOWN;
}
}
#define GENERIC_DIRSIZ(dp) \
((sizeof (struct dirent) - (MAXNAMLEN+1)) + (((dp)->d_namlen+1 + 3) &~ 3))
reclen = dirent.d_reclen = GENERIC_DIRSIZ(&dirent);
if (pos >= startpos) { /* made it to the offset yet? */
if (uio_resid(uio) < reclen) { /* will it fit? */
break;
}
strlcpy(dirent.d_name, name, DEVMAXNAMESIZE);
if ((error = uiomove((caddr_t)&dirent,
dirent.d_reclen, uio)) != 0) {
break;
}
}
pos += reclen;
if ((nodenumber > 1) && name_node) {
name_node = name_node->de_next;
}
nodenumber++;
}
DEVFS_UNLOCK();
uio->uio_offset = pos;
devfs_consider_time_update(dir_node, DEVFS_UPDATE_ACCESS);
return error;
}
/*
*/
static int
devfs_readlink(struct vnop_readlink_args *ap)
/*struct vnop_readlink_args {
* struct vnode *a_vp;
* struct uio *a_uio;
* vfs_context_t a_context;
* } */
{
struct vnode *vp = ap->a_vp;
struct uio *uio = ap->a_uio;
devnode_t * lnk_node;
int error = 0;
/* set up refs to dir */
lnk_node = VTODN(vp);
if (lnk_node->dn_type != DEV_SLNK) {
error = EINVAL;
goto out;
}
error = uiomove(lnk_node->dn_typeinfo.Slnk.name,
(int)lnk_node->dn_typeinfo.Slnk.namelen, uio);
out:
return error;
}
static int
devfs_reclaim(struct vnop_reclaim_args *ap)
/*struct vnop_reclaim_args {
* struct vnode *a_vp;
* } */
{
struct vnode * vp = ap->a_vp;
devnode_t * dnp;
DEVFS_LOCK();
dnp = VTODN(vp);
if (dnp) {
/* If this is a cloning device, it didn't have a dn_vn anyway */
dnp->dn_vn = NULL;
vnode_clearfsnode(vp);
/* This could delete the node, if we are the last vnode */
devfs_rele_node(dnp);
}
DEVFS_UNLOCK();
return 0;
}
/*
* Get configurable pathname variables.
*/
static int
devs_vnop_pathconf(
struct vnop_pathconf_args /* {
* struct vnode *a_vp;
* int a_name;
* int *a_retval;
* vfs_context_t a_context;
* } */*ap)
{
switch (ap->a_name) {
case _PC_LINK_MAX:
/* arbitrary limit matching HFS; devfs has no hard limit */
*ap->a_retval = 32767;
break;
case _PC_NAME_MAX:
*ap->a_retval = DEVMAXNAMESIZE - 1; /* includes NUL */
break;
case _PC_PATH_MAX:
*ap->a_retval = DEVMAXPATHSIZE - 1; /* XXX nonconformant */
break;
case _PC_CHOWN_RESTRICTED:
*ap->a_retval = 200112; /* _POSIX_CHOWN_RESTRICTED */
break;
case _PC_NO_TRUNC:
*ap->a_retval = 0;
break;
case _PC_CASE_SENSITIVE:
*ap->a_retval = 1;
break;
case _PC_CASE_PRESERVING:
*ap->a_retval = 1;
break;
default:
return EINVAL;
}
return 0;
}
/**************************************************************************\
* pseudo ops *
\**************************************************************************/
/*
*
* struct vnop_inactive_args {
* struct vnode *a_vp;
* vfs_context_t a_context;
* }
*/
static int
devfs_inactive(__unused struct vnop_inactive_args *ap)
{
vnode_t vp = ap->a_vp;
devnode_t *dnp = VTODN(vp);
/*
* Cloned vnodes are not linked in anywhere, so they
* can just be recycled.
*/
if (dnp->dn_clone != NULL) {
vnode_recycle(vp);
}
return 0;
}
/*
* called with DEVFS_LOCK held
*/
static int
devfs_update(struct vnode *vp, struct timeval *access, struct timeval *modify)
{
devnode_t * ip;
struct timeval now;
ip = VTODN(vp);
if (vp->v_mount->mnt_flag & MNT_RDONLY) {
ip->dn_access = 0;
ip->dn_change = 0;
ip->dn_update = 0;
return 0;
}
DEVFS_ATTR_LOCK_SPIN();
microtime(&now);
dn_times_locked(ip, access, modify, &now, DEVFS_UPDATE_ACCESS | DEVFS_UPDATE_MOD);
DEVFS_ATTR_UNLOCK();
return 0;
}
#define VOPFUNC int (*)(void *)
#define devfs_default_error (void (*)(void))vn_default_error
/* The following ops are used by directories and symlinks */
int(**devfs_vnodeop_p)(void *);
const static struct vnodeopv_entry_desc devfs_vnodeop_entries[] = {
{ .opve_op = &vnop_default_desc, .opve_impl = (VOPFUNC)devfs_default_error },
{ .opve_op = &vnop_lookup_desc, .opve_impl = (VOPFUNC)devfs_lookup }, /* lookup */
{ .opve_op = &vnop_create_desc, .opve_impl = (VOPFUNC)err_create }, /* create */
{ .opve_op = &vnop_whiteout_desc, .opve_impl = (VOPFUNC)err_whiteout }, /* whiteout */
{ .opve_op = &vnop_mknod_desc, .opve_impl = (VOPFUNC)devfs_mknod }, /* mknod */
{ .opve_op = &vnop_open_desc, .opve_impl = (VOPFUNC)nop_open }, /* open */
{ .opve_op = &vnop_close_desc, .opve_impl = (VOPFUNC)devfs_close }, /* close */
{ .opve_op = &vnop_getattr_desc, .opve_impl = (VOPFUNC)devfs_getattr }, /* getattr */
{ .opve_op = &vnop_setattr_desc, .opve_impl = (VOPFUNC)devfs_setattr }, /* setattr */
{ .opve_op = &vnop_read_desc, .opve_impl = (VOPFUNC)devfs_read }, /* read */
{ .opve_op = &vnop_write_desc, .opve_impl = (VOPFUNC)devfs_write }, /* write */
{ .opve_op = &vnop_ioctl_desc, .opve_impl = (VOPFUNC)err_ioctl }, /* ioctl */
{ .opve_op = &vnop_select_desc, .opve_impl = (VOPFUNC)err_select }, /* select */
{ .opve_op = &vnop_revoke_desc, .opve_impl = (VOPFUNC)err_revoke }, /* revoke */
{ .opve_op = &vnop_mmap_desc, .opve_impl = (VOPFUNC)err_mmap }, /* mmap */
{ .opve_op = &vnop_fsync_desc, .opve_impl = (VOPFUNC)nop_fsync }, /* fsync */
{ .opve_op = &vnop_remove_desc, .opve_impl = (VOPFUNC)devfs_vnop_remove }, /* remove */
{ .opve_op = &vnop_link_desc, .opve_impl = (VOPFUNC)devfs_link }, /* link */
{ .opve_op = &vnop_rename_desc, .opve_impl = (VOPFUNC)devfs_rename }, /* rename */
{ .opve_op = &vnop_mkdir_desc, .opve_impl = (VOPFUNC)devfs_mkdir }, /* mkdir */
{ .opve_op = &vnop_rmdir_desc, .opve_impl = (VOPFUNC)devfs_rmdir }, /* rmdir */
{ .opve_op = &vnop_symlink_desc, .opve_impl = (VOPFUNC)devfs_symlink }, /* symlink */
{ .opve_op = &vnop_readdir_desc, .opve_impl = (VOPFUNC)devfs_readdir }, /* readdir */
{ .opve_op = &vnop_readlink_desc, .opve_impl = (VOPFUNC)devfs_readlink }, /* readlink */
{ .opve_op = &vnop_inactive_desc, .opve_impl = (VOPFUNC)devfs_inactive }, /* inactive */
{ .opve_op = &vnop_reclaim_desc, .opve_impl = (VOPFUNC)devfs_reclaim }, /* reclaim */
{ .opve_op = &vnop_strategy_desc, .opve_impl = (VOPFUNC)err_strategy }, /* strategy */
{ .opve_op = &vnop_pathconf_desc, .opve_impl = (VOPFUNC)devs_vnop_pathconf }, /* pathconf */
{ .opve_op = &vnop_advlock_desc, .opve_impl = (VOPFUNC)err_advlock }, /* advlock */
{ .opve_op = &vnop_bwrite_desc, .opve_impl = (VOPFUNC)err_bwrite },
{ .opve_op = &vnop_pagein_desc, .opve_impl = (VOPFUNC)err_pagein }, /* Pagein */
{ .opve_op = &vnop_pageout_desc, .opve_impl = (VOPFUNC)err_pageout }, /* Pageout */
{ .opve_op = &vnop_copyfile_desc, .opve_impl = (VOPFUNC)err_copyfile }, /* Copyfile */
{ .opve_op = &vnop_blktooff_desc, .opve_impl = (VOPFUNC)err_blktooff }, /* blktooff */
{ .opve_op = &vnop_offtoblk_desc, .opve_impl = (VOPFUNC)err_offtoblk }, /* offtoblk */
{ .opve_op = &vnop_blockmap_desc, .opve_impl = (VOPFUNC)err_blockmap }, /* blockmap */
#if CONFIG_MACF
{ .opve_op = &vnop_setlabel_desc, .opve_impl = (VOPFUNC)devfs_setlabel }, /* setlabel */
#endif
{ .opve_op = (struct vnodeop_desc*)NULL, .opve_impl = (int (*)(void *))NULL }
};
const struct vnodeopv_desc devfs_vnodeop_opv_desc =
{ .opv_desc_vector_p = &devfs_vnodeop_p, .opv_desc_ops = devfs_vnodeop_entries };
/* The following ops are used by the device nodes */
int(**devfs_spec_vnodeop_p)(void *);
const static struct vnodeopv_entry_desc devfs_spec_vnodeop_entries[] = {
{ .opve_op = &vnop_default_desc, .opve_impl = (VOPFUNC)devfs_default_error },
{ .opve_op = &vnop_lookup_desc, .opve_impl = (VOPFUNC)spec_lookup }, /* lookup */
{ .opve_op = &vnop_create_desc, .opve_impl = (VOPFUNC)spec_create }, /* create */
{ .opve_op = &vnop_mknod_desc, .opve_impl = (VOPFUNC)spec_mknod }, /* mknod */
{ .opve_op = &vnop_open_desc, .opve_impl = (VOPFUNC)spec_open }, /* open */
{ .opve_op = &vnop_close_desc, .opve_impl = (VOPFUNC)devfsspec_close }, /* close */
{ .opve_op = &vnop_getattr_desc, .opve_impl = (VOPFUNC)devfs_getattr }, /* getattr */
{ .opve_op = &vnop_setattr_desc, .opve_impl = (VOPFUNC)devfs_setattr }, /* setattr */
{ .opve_op = &vnop_read_desc, .opve_impl = (VOPFUNC)devfsspec_read }, /* read */
{ .opve_op = &vnop_write_desc, .opve_impl = (VOPFUNC)devfsspec_write }, /* write */
{ .opve_op = &vnop_ioctl_desc, .opve_impl = (VOPFUNC)spec_ioctl }, /* ioctl */
{ .opve_op = &vnop_select_desc, .opve_impl = (VOPFUNC)spec_select }, /* select */
{ .opve_op = &vnop_revoke_desc, .opve_impl = (VOPFUNC)spec_revoke }, /* revoke */
{ .opve_op = &vnop_mmap_desc, .opve_impl = (VOPFUNC)spec_mmap }, /* mmap */
{ .opve_op = &vnop_fsync_desc, .opve_impl = (VOPFUNC)spec_fsync }, /* fsync */
{ .opve_op = &vnop_remove_desc, .opve_impl = (VOPFUNC)devfs_vnop_remove }, /* remove */
{ .opve_op = &vnop_link_desc, .opve_impl = (VOPFUNC)devfs_link }, /* link */
{ .opve_op = &vnop_rename_desc, .opve_impl = (VOPFUNC)spec_rename }, /* rename */
{ .opve_op = &vnop_mkdir_desc, .opve_impl = (VOPFUNC)spec_mkdir }, /* mkdir */
{ .opve_op = &vnop_rmdir_desc, .opve_impl = (VOPFUNC)spec_rmdir }, /* rmdir */
{ .opve_op = &vnop_symlink_desc, .opve_impl = (VOPFUNC)spec_symlink }, /* symlink */
{ .opve_op = &vnop_readdir_desc, .opve_impl = (VOPFUNC)spec_readdir }, /* readdir */
{ .opve_op = &vnop_readlink_desc, .opve_impl = (VOPFUNC)spec_readlink }, /* readlink */
{ .opve_op = &vnop_inactive_desc, .opve_impl = (VOPFUNC)devfs_inactive }, /* inactive */
{ .opve_op = &vnop_reclaim_desc, .opve_impl = (VOPFUNC)devfs_reclaim }, /* reclaim */
{ .opve_op = &vnop_strategy_desc, .opve_impl = (VOPFUNC)spec_strategy }, /* strategy */
{ .opve_op = &vnop_pathconf_desc, .opve_impl = (VOPFUNC)spec_pathconf }, /* pathconf */
{ .opve_op = &vnop_advlock_desc, .opve_impl = (VOPFUNC)spec_advlock }, /* advlock */
{ .opve_op = &vnop_bwrite_desc, .opve_impl = (VOPFUNC)vn_bwrite },
{ .opve_op = &vnop_pagein_desc, .opve_impl = (VOPFUNC)err_pagein }, /* Pagein */
{ .opve_op = &vnop_pageout_desc, .opve_impl = (VOPFUNC)err_pageout }, /* Pageout */
{ .opve_op = &vnop_copyfile_desc, .opve_impl = (VOPFUNC)err_copyfile }, /* Copyfile */
{ .opve_op = &vnop_blktooff_desc, .opve_impl = (VOPFUNC)spec_blktooff }, /* blktooff */
{ .opve_op = &vnop_blktooff_desc, .opve_impl = (VOPFUNC)spec_offtoblk }, /* blkofftoblk */
{ .opve_op = &vnop_blockmap_desc, .opve_impl = (VOPFUNC)spec_blockmap }, /* blockmap */
#if CONFIG_MACF
{ .opve_op = &vnop_setlabel_desc, .opve_impl = (VOPFUNC)devfs_setlabel }, /* setlabel */
#endif
{ .opve_op = (struct vnodeop_desc*)NULL, .opve_impl = (int (*)(void *))NULL }
};
const struct vnodeopv_desc devfs_spec_vnodeop_opv_desc =
{ .opv_desc_vector_p = &devfs_spec_vnodeop_p, .opv_desc_ops = devfs_spec_vnodeop_entries };
#if FDESC
int(**devfs_devfd_vnodeop_p)(void*);
const static struct vnodeopv_entry_desc devfs_devfd_vnodeop_entries[] = {
{ .opve_op = &vnop_default_desc, .opve_impl = (VOPFUNC)devfs_default_error },
{ .opve_op = &vnop_lookup_desc, .opve_impl = (VOPFUNC)devfs_devfd_lookup}, /* lookup */
{ .opve_op = &vnop_open_desc, .opve_impl = (VOPFUNC)nop_open }, /* open */
{ .opve_op = &vnop_close_desc, .opve_impl = (VOPFUNC)devfs_close }, /* close */
{ .opve_op = &vnop_getattr_desc, .opve_impl = (VOPFUNC)devfs_getattr }, /* getattr */
{ .opve_op = &vnop_setattr_desc, .opve_impl = (VOPFUNC)devfs_setattr }, /* setattr */
{ .opve_op = &vnop_revoke_desc, .opve_impl = (VOPFUNC)err_revoke }, /* revoke */
{ .opve_op = &vnop_fsync_desc, .opve_impl = (VOPFUNC)nop_fsync }, /* fsync */
{ .opve_op = &vnop_readdir_desc, .opve_impl = (VOPFUNC)devfs_devfd_readdir}, /* readdir */
{ .opve_op = &vnop_inactive_desc, .opve_impl = (VOPFUNC)devfs_inactive }, /* inactive */
{ .opve_op = &vnop_reclaim_desc, .opve_impl = (VOPFUNC)devfs_reclaim }, /* reclaim */
{ .opve_op = &vnop_pathconf_desc, .opve_impl = (VOPFUNC)devs_vnop_pathconf }, /* pathconf */
#if CONFIG_MACF
{ .opve_op = &vnop_setlabel_desc, .opve_impl = (VOPFUNC)devfs_setlabel }, /* setlabel */
#endif
{ .opve_op = (struct vnodeop_desc*)NULL, .opve_impl = (int (*)(void *))NULL }
};
const struct vnodeopv_desc devfs_devfd_vnodeop_opv_desc =
{ .opv_desc_vector_p = &devfs_devfd_vnodeop_p, .opv_desc_ops = devfs_devfd_vnodeop_entries};
#endif /* FDESC */
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