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gems-kernel/source/THIRDPARTY/xnu/bsd/vfs/kpi_vfs.c

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add darwin/xnu functionality
2024-06-03 16:29:39 +00:00
/*
* Copyright (c) 2000-2022 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 (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)kpi_vfs.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.
*/
/*
* External virtual filesystem routines
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc_internal.h>
#include <sys/kauth.h>
#include <sys/mount.h>
#include <sys/mount_internal.h>
#include <sys/time.h>
#include <sys/disk.h>
#include <sys/vnode_internal.h>
#include <sys/stat.h>
#include <sys/namei.h>
#include <sys/ucred.h>
#include <sys/buf.h>
#include <sys/errno.h>
#include <kern/kalloc.h>
#include <sys/domain.h>
#include <sys/mbuf.h>
#include <sys/syslog.h>
#include <sys/ubc.h>
#include <sys/vm.h>
#include <sys/sysctl.h>
#include <sys/filedesc.h>
#include <sys/event.h>
#include <sys/fsevents.h>
#include <sys/user.h>
#include <sys/lockf.h>
#include <sys/xattr.h>
#include <sys/kdebug.h>
#include <kern/assert.h>
#include <kern/zalloc.h>
#include <kern/task.h>
#include <kern/policy_internal.h>
#include <libkern/OSByteOrder.h>
#include <miscfs/specfs/specdev.h>
#include <mach/mach_types.h>
#include <mach/memory_object_types.h>
#include <mach/task.h>
#if CONFIG_MACF
#include <security/mac_framework.h>
#endif
#if NULLFS
#include <miscfs/nullfs/nullfs.h>
#endif
#include <sys/sdt.h>
#define ESUCCESS 0
#undef mount_t
#undef vnode_t
#define COMPAT_ONLY
#define NATIVE_XATTR(VP) \
((VP)->v_mount ? (VP)->v_mount->mnt_kern_flag & MNTK_EXTENDED_ATTRS : 0)
#if CONFIG_APPLEDOUBLE
static void xattrfile_remove(vnode_t dvp, const char *basename,
vfs_context_t ctx, int force);
static void xattrfile_setattr(vnode_t dvp, const char * basename,
struct vnode_attr * vap, vfs_context_t ctx);
#endif /* CONFIG_APPLEDOUBLE */
extern lck_rw_t rootvnode_rw_lock;
static errno_t post_rename(vnode_t fdvp, vnode_t fvp, vnode_t tdvp, vnode_t tvp);
KALLOC_TYPE_DEFINE(KT_VFS_CONTEXT, struct vfs_context, KT_PRIV_ACCT);
extern int fstypenumstart;
char vfs_typenum_arr[13];
LCK_GRP_DECLARE(typenum_arr_grp, "typenum array group");
LCK_MTX_DECLARE(vfs_typenum_mtx, &typenum_arr_grp);
/*
* vnode_setneedinactive
*
* Description: Indicate that when the last iocount on this vnode goes away,
* and the usecount is also zero, we should inform the filesystem
* via VNOP_INACTIVE.
*
* Parameters: vnode_t vnode to mark
*
* Returns: Nothing
*
* Notes: Notably used when we're deleting a file--we need not have a
* usecount, so VNOP_INACTIVE may not get called by anyone. We
* want it called when we drop our iocount.
*/
void
vnode_setneedinactive(vnode_t vp)
{
cache_purge(vp);
vnode_lock_spin(vp);
vp->v_lflag |= VL_NEEDINACTIVE;
vnode_unlock(vp);
}
/* ====================================================================== */
/* ************ EXTERNAL KERNEL APIS ********************************** */
/* ====================================================================== */
/*
* implementations of exported VFS operations
*/
int
VFS_MOUNT(mount_t mp, vnode_t devvp, user_addr_t data, vfs_context_t ctx)
{
int error;
if ((mp == dead_mountp) || (mp->mnt_op->vfs_mount == 0)) {
return ENOTSUP;
}
if (vfs_context_is64bit(ctx)) {
if (vfs_64bitready(mp)) {
error = (*mp->mnt_op->vfs_mount)(mp, devvp, data, ctx);
} else {
error = ENOTSUP;
}
} else {
error = (*mp->mnt_op->vfs_mount)(mp, devvp, data, ctx);
}
return error;
}
int
VFS_START(mount_t mp, int flags, vfs_context_t ctx)
{
int error;
if ((mp == dead_mountp) || (mp->mnt_op->vfs_start == 0)) {
return ENOTSUP;
}
error = (*mp->mnt_op->vfs_start)(mp, flags, ctx);
return error;
}
int
VFS_UNMOUNT(mount_t mp, int flags, vfs_context_t ctx)
{
int error;
if ((mp == dead_mountp) || (mp->mnt_op->vfs_unmount == 0)) {
return ENOTSUP;
}
error = (*mp->mnt_op->vfs_unmount)(mp, flags, ctx);
return error;
}
/*
* Returns: 0 Success
* ENOTSUP Not supported
* <vfs_root>:ENOENT
* <vfs_root>:???
*
* Note: The return codes from the underlying VFS's root routine can't
* be fully enumerated here, since third party VFS authors may not
* limit their error returns to the ones documented here, even
* though this may result in some programs functioning incorrectly.
*
* The return codes documented above are those which may currently
* be returned by HFS from hfs_vfs_root, which is a simple wrapper
* for a call to hfs_vget on the volume mount point, not including
* additional error codes which may be propagated from underlying
* routines called by hfs_vget.
*/
int
VFS_ROOT(mount_t mp, struct vnode ** vpp, vfs_context_t ctx)
{
int error;
if ((mp == dead_mountp) || (mp->mnt_op->vfs_root == 0)) {
return ENOTSUP;
}
if (ctx == NULL) {
ctx = vfs_context_current();
}
error = (*mp->mnt_op->vfs_root)(mp, vpp, ctx);
return error;
}
int
VFS_QUOTACTL(mount_t mp, int cmd, uid_t uid, caddr_t datap, vfs_context_t ctx)
{
int error;
if ((mp == dead_mountp) || (mp->mnt_op->vfs_quotactl == 0)) {
return ENOTSUP;
}
error = (*mp->mnt_op->vfs_quotactl)(mp, cmd, uid, datap, ctx);
return error;
}
int
VFS_GETATTR(mount_t mp, struct vfs_attr *vfa, vfs_context_t ctx)
{
int error;
if ((mp == dead_mountp) || (mp->mnt_op->vfs_getattr == 0)) {
return ENOTSUP;
}
if (ctx == NULL) {
ctx = vfs_context_current();
}
error = (*mp->mnt_op->vfs_getattr)(mp, vfa, ctx);
return error;
}
int
VFS_SETATTR(mount_t mp, struct vfs_attr *vfa, vfs_context_t ctx)
{
int error;
if ((mp == dead_mountp) || (mp->mnt_op->vfs_setattr == 0)) {
return ENOTSUP;
}
if (ctx == NULL) {
ctx = vfs_context_current();
}
error = (*mp->mnt_op->vfs_setattr)(mp, vfa, ctx);
return error;
}
int
VFS_SYNC(mount_t mp, int flags, vfs_context_t ctx)
{
int error;
if ((mp == dead_mountp) || (mp->mnt_op->vfs_sync == 0)) {
return ENOTSUP;
}
if (ctx == NULL) {
ctx = vfs_context_current();
}
error = (*mp->mnt_op->vfs_sync)(mp, flags, ctx);
return error;
}
int
VFS_VGET(mount_t mp, ino64_t ino, struct vnode **vpp, vfs_context_t ctx)
{
int error;
if ((mp == dead_mountp) || (mp->mnt_op->vfs_vget == 0)) {
return ENOTSUP;
}
if (ctx == NULL) {
ctx = vfs_context_current();
}
error = (*mp->mnt_op->vfs_vget)(mp, ino, vpp, ctx);
return error;
}
int
VFS_FHTOVP(mount_t mp, int fhlen, unsigned char *fhp, vnode_t *vpp, vfs_context_t ctx)
{
int error;
if ((mp == dead_mountp) || (mp->mnt_op->vfs_fhtovp == 0)) {
return ENOTSUP;
}
if (ctx == NULL) {
ctx = vfs_context_current();
}
error = (*mp->mnt_op->vfs_fhtovp)(mp, fhlen, fhp, vpp, ctx);
return error;
}
int
VFS_VPTOFH(struct vnode *vp, int *fhlenp, unsigned char *fhp, vfs_context_t ctx)
{
int error;
if ((vp->v_mount == dead_mountp) || (vp->v_mount->mnt_op->vfs_vptofh == 0)) {
return ENOTSUP;
}
if (ctx == NULL) {
ctx = vfs_context_current();
}
error = (*vp->v_mount->mnt_op->vfs_vptofh)(vp, fhlenp, fhp, ctx);
return error;
}
int
VFS_IOCTL(struct mount *mp, u_long command, caddr_t data,
int flags, vfs_context_t context)
{
if (mp == dead_mountp || !mp->mnt_op->vfs_ioctl) {
return ENOTSUP;
}
return mp->mnt_op->vfs_ioctl(mp, command, data, flags,
context ?: vfs_context_current());
}
int
VFS_VGET_SNAPDIR(mount_t mp, vnode_t *vpp, vfs_context_t ctx)
{
int error;
if ((mp == dead_mountp) || (mp->mnt_op->vfs_vget_snapdir == 0)) {
return ENOTSUP;
}
if (ctx == NULL) {
ctx = vfs_context_current();
}
error = (*mp->mnt_op->vfs_vget_snapdir)(mp, vpp, ctx);
return error;
}
/* returns the cached throttle mask for the mount_t */
uint64_t
vfs_throttle_mask(mount_t mp)
{
return mp->mnt_throttle_mask;
}
/* returns a copy of vfs type name for the mount_t */
void
vfs_name(mount_t mp, char *buffer)
{
strncpy(buffer, mp->mnt_vtable->vfc_name, MFSNAMELEN);
}
/* returns vfs type number for the mount_t */
int
vfs_typenum(mount_t mp)
{
return mp->mnt_vtable->vfc_typenum;
}
/* Safe to cast to "struct label*"; returns "void*" to limit dependence of mount.h on security headers. */
void*
vfs_mntlabel(mount_t mp)
{
return (void*)mac_mount_label(mp);
}
uint64_t
vfs_mount_id(mount_t mp)
{
return mp->mnt_mount_id;
}
/* returns command modifier flags of mount_t ie. MNT_CMDFLAGS */
uint64_t
vfs_flags(mount_t mp)
{
return (uint64_t)(mp->mnt_flag & (MNT_CMDFLAGS | MNT_VISFLAGMASK));
}
/* set any of the command modifier flags(MNT_CMDFLAGS) in mount_t */
void
vfs_setflags(mount_t mp, uint64_t flags)
{
uint32_t lflags = (uint32_t)(flags & (MNT_CMDFLAGS | MNT_VISFLAGMASK));
mount_lock(mp);
mp->mnt_flag |= lflags;
mount_unlock(mp);
}
/* clear any of the command modifier flags(MNT_CMDFLAGS) in mount_t */
void
vfs_clearflags(mount_t mp, uint64_t flags)
{
uint32_t lflags = (uint32_t)(flags & (MNT_CMDFLAGS | MNT_VISFLAGMASK));
mount_lock(mp);
mp->mnt_flag &= ~lflags;
mount_unlock(mp);
}
/* Is the mount_t ronly and upgrade read/write requested? */
int
vfs_iswriteupgrade(mount_t mp) /* ronly && MNTK_WANTRDWR */
{
return (mp->mnt_flag & MNT_RDONLY) && (mp->mnt_kern_flag & MNTK_WANTRDWR);
}
/* Is the mount_t mounted ronly */
int
vfs_isrdonly(mount_t mp)
{
return mp->mnt_flag & MNT_RDONLY;
}
/* Is the mount_t mounted for filesystem synchronous writes? */
int
vfs_issynchronous(mount_t mp)
{
return mp->mnt_flag & MNT_SYNCHRONOUS;
}
/* Is the mount_t mounted read/write? */
int
vfs_isrdwr(mount_t mp)
{
return (mp->mnt_flag & MNT_RDONLY) == 0;
}
/* Is mount_t marked for update (ie MNT_UPDATE) */
int
vfs_isupdate(mount_t mp)
{
return mp->mnt_flag & MNT_UPDATE;
}
/* Is mount_t marked for reload (ie MNT_RELOAD) */
int
vfs_isreload(mount_t mp)
{
return (mp->mnt_flag & MNT_UPDATE) && (mp->mnt_flag & MNT_RELOAD);
}
/* Is mount_t marked for forced unmount (ie MNT_FORCE or MNTK_FRCUNMOUNT) */
int
vfs_isforce(mount_t mp)
{
if (mp->mnt_lflag & MNT_LFORCE) {
return 1;
} else {
return 0;
}
}
int
vfs_isunmount(mount_t mp)
{
if ((mp->mnt_lflag & MNT_LUNMOUNT)) {
return 1;
} else {
return 0;
}
}
int
vfs_64bitready(mount_t mp)
{
if ((mp->mnt_vtable->vfc_vfsflags & VFC_VFS64BITREADY)) {
return 1;
} else {
return 0;
}
}
int
vfs_authcache_ttl(mount_t mp)
{
if ((mp->mnt_kern_flag & (MNTK_AUTH_OPAQUE | MNTK_AUTH_CACHE_TTL))) {
return mp->mnt_authcache_ttl;
} else {
return CACHED_RIGHT_INFINITE_TTL;
}
}
void
vfs_setauthcache_ttl(mount_t mp, int ttl)
{
mount_lock(mp);
mp->mnt_kern_flag |= MNTK_AUTH_CACHE_TTL;
mp->mnt_authcache_ttl = ttl;
mount_unlock(mp);
}
void
vfs_clearauthcache_ttl(mount_t mp)
{
mount_lock(mp);
mp->mnt_kern_flag &= ~MNTK_AUTH_CACHE_TTL;
/*
* back to the default TTL value in case
* MNTK_AUTH_OPAQUE is set on this mount
*/
mp->mnt_authcache_ttl = CACHED_LOOKUP_RIGHT_TTL;
mount_unlock(mp);
}
int
vfs_authopaque(mount_t mp)
{
if ((mp->mnt_kern_flag & MNTK_AUTH_OPAQUE)) {
return 1;
} else {
return 0;
}
}
int
vfs_authopaqueaccess(mount_t mp)
{
if ((mp->mnt_kern_flag & MNTK_AUTH_OPAQUE_ACCESS)) {
return 1;
} else {
return 0;
}
}
void
vfs_setauthopaque(mount_t mp)
{
mount_lock(mp);
mp->mnt_kern_flag |= MNTK_AUTH_OPAQUE;
mount_unlock(mp);
}
void
vfs_setauthopaqueaccess(mount_t mp)
{
mount_lock(mp);
mp->mnt_kern_flag |= MNTK_AUTH_OPAQUE_ACCESS;
mount_unlock(mp);
}
void
vfs_clearauthopaque(mount_t mp)
{
mount_lock(mp);
mp->mnt_kern_flag &= ~MNTK_AUTH_OPAQUE;
mount_unlock(mp);
}
void
vfs_clearauthopaqueaccess(mount_t mp)
{
mount_lock(mp);
mp->mnt_kern_flag &= ~MNTK_AUTH_OPAQUE_ACCESS;
mount_unlock(mp);
}
void
vfs_setextendedsecurity(mount_t mp)
{
mount_lock(mp);
mp->mnt_kern_flag |= MNTK_EXTENDED_SECURITY;
mount_unlock(mp);
}
void
vfs_setmntsystem(mount_t mp)
{
mount_lock(mp);
mp->mnt_kern_flag |= MNTK_SYSTEM;
mount_unlock(mp);
}
void
vfs_setmntsystemdata(mount_t mp)
{
mount_lock(mp);
mp->mnt_kern_flag |= MNTK_SYSTEMDATA;
mount_unlock(mp);
}
void
vfs_setmntswap(mount_t mp)
{
mount_lock(mp);
mp->mnt_kern_flag |= (MNTK_SYSTEM | MNTK_SWAP_MOUNT);
mount_unlock(mp);
}
void
vfs_clearextendedsecurity(mount_t mp)
{
mount_lock(mp);
mp->mnt_kern_flag &= ~MNTK_EXTENDED_SECURITY;
mount_unlock(mp);
}
void
vfs_setnoswap(mount_t mp)
{
mount_lock(mp);
mp->mnt_kern_flag |= MNTK_NOSWAP;
mount_unlock(mp);
}
void
vfs_clearnoswap(mount_t mp)
{
mount_lock(mp);
mp->mnt_kern_flag &= ~MNTK_NOSWAP;
mount_unlock(mp);
}
int
vfs_extendedsecurity(mount_t mp)
{
return mp->mnt_kern_flag & MNTK_EXTENDED_SECURITY;
}
/* returns the max size of short symlink in this mount_t */
uint32_t
vfs_maxsymlen(mount_t mp)
{
return mp->mnt_maxsymlinklen;
}
/* set max size of short symlink on mount_t */
void
vfs_setmaxsymlen(mount_t mp, uint32_t symlen)
{
mp->mnt_maxsymlinklen = symlen;
}
boolean_t
vfs_is_basesystem(mount_t mp)
{
return ((mp->mnt_supl_kern_flag & MNTK_SUPL_BASESYSTEM) == 0) ? false : true;
}
/* return a pointer to the RO vfs_statfs associated with mount_t */
struct vfsstatfs *
vfs_statfs(mount_t mp)
{
return &mp->mnt_vfsstat;
}
int
vfs_getattr(mount_t mp, struct vfs_attr *vfa, vfs_context_t ctx)
{
int error;
if ((error = VFS_GETATTR(mp, vfa, ctx)) != 0) {
return error;
}
/*
* If we have a filesystem create time, use it to default some others.
*/
if (VFSATTR_IS_SUPPORTED(vfa, f_create_time)) {
if (VFSATTR_IS_ACTIVE(vfa, f_modify_time) && !VFSATTR_IS_SUPPORTED(vfa, f_modify_time)) {
VFSATTR_RETURN(vfa, f_modify_time, vfa->f_create_time);
}
}
return 0;
}
int
vfs_setattr(mount_t mp, struct vfs_attr *vfa, vfs_context_t ctx)
{
int error;
/*
* with a read-only system volume, we need to allow rename of the root volume
* even if it's read-only. Don't return EROFS here if setattr changes only
* the volume name
*/
if (vfs_isrdonly(mp) &&
!((strcmp(mp->mnt_vfsstat.f_fstypename, "apfs") == 0) && (vfa->f_active == VFSATTR_f_vol_name))) {
return EROFS;
}
error = VFS_SETATTR(mp, vfa, ctx);
/*
* If we had alternate ways of setting vfs attributes, we'd
* fall back here.
*/
return error;
}
/* return the private data handle stored in mount_t */
void *
vfs_fsprivate(mount_t mp)
{
return mp->mnt_data;
}
/* set the private data handle in mount_t */
void
vfs_setfsprivate(mount_t mp, void *mntdata)
{
mount_lock(mp);
mp->mnt_data = mntdata;
mount_unlock(mp);
}
/* query whether the mount point supports native EAs */
int
vfs_nativexattrs(mount_t mp)
{
return mp->mnt_kern_flag & MNTK_EXTENDED_ATTRS;
}
/*
* return the block size of the underlying
* device associated with mount_t
*/
int
vfs_devblocksize(mount_t mp)
{
return mp->mnt_devblocksize;
}
/*
* Returns vnode with an iocount that must be released with vnode_put()
*/
vnode_t
vfs_vnodecovered(mount_t mp)
{
vnode_t vp = mp->mnt_vnodecovered;
if ((vp == NULL) || (vnode_getwithref(vp) != 0)) {
return NULL;
} else {
return vp;
}
}
/*
* Returns device vnode backing a mountpoint with an iocount (if valid vnode exists).
* The iocount must be released with vnode_put(). Note that this KPI is subtle
* with respect to the validity of using this device vnode for anything substantial
* (which is discouraged). If commands are sent to the device driver without
* taking proper steps to ensure that the device is still open, chaos may ensue.
* Similarly, this routine should only be called if there is some guarantee that
* the mount itself is still valid.
*/
vnode_t
vfs_devvp(mount_t mp)
{
vnode_t vp = mp->mnt_devvp;
if ((vp != NULLVP) && (vnode_get(vp) == 0)) {
return vp;
}
return NULLVP;
}
/*
* return the io attributes associated with mount_t
*/
void
vfs_ioattr(mount_t mp, struct vfsioattr *ioattrp)
{
ioattrp->io_reserved[0] = NULL;
ioattrp->io_reserved[1] = NULL;
if (mp == NULL) {
ioattrp->io_maxreadcnt = MAXPHYS;
ioattrp->io_maxwritecnt = MAXPHYS;
ioattrp->io_segreadcnt = 32;
ioattrp->io_segwritecnt = 32;
ioattrp->io_maxsegreadsize = MAXPHYS;
ioattrp->io_maxsegwritesize = MAXPHYS;
ioattrp->io_devblocksize = DEV_BSIZE;
ioattrp->io_flags = 0;
ioattrp->io_max_swappin_available = 0;
} else {
ioattrp->io_maxreadcnt = mp->mnt_maxreadcnt;
ioattrp->io_maxwritecnt = mp->mnt_maxwritecnt;
ioattrp->io_segreadcnt = mp->mnt_segreadcnt;
ioattrp->io_segwritecnt = mp->mnt_segwritecnt;
ioattrp->io_maxsegreadsize = mp->mnt_maxsegreadsize;
ioattrp->io_maxsegwritesize = mp->mnt_maxsegwritesize;
ioattrp->io_devblocksize = mp->mnt_devblocksize;
ioattrp->io_flags = mp->mnt_ioflags;
ioattrp->io_max_swappin_available = mp->mnt_max_swappin_available;
}
}
/*
* set the IO attributes associated with mount_t
*/
void
vfs_setioattr(mount_t mp, struct vfsioattr * ioattrp)
{
if (mp == NULL) {
return;
}
mp->mnt_maxreadcnt = ioattrp->io_maxreadcnt;
mp->mnt_maxwritecnt = ioattrp->io_maxwritecnt;
mp->mnt_segreadcnt = ioattrp->io_segreadcnt;
mp->mnt_segwritecnt = ioattrp->io_segwritecnt;
mp->mnt_maxsegreadsize = ioattrp->io_maxsegreadsize;
mp->mnt_maxsegwritesize = ioattrp->io_maxsegwritesize;
mp->mnt_devblocksize = ioattrp->io_devblocksize;
mp->mnt_ioflags = ioattrp->io_flags;
mp->mnt_max_swappin_available = ioattrp->io_max_swappin_available;
}
/*
* Add a new filesystem into the kernel specified in passed in
* vfstable structure. It fills in the vnode
* dispatch vector that is to be passed to when vnodes are created.
* It returns a handle which is to be used to when the FS is to be removed
*/
typedef int (*PFI)(void *);
extern int vfs_opv_numops;
errno_t
vfs_fsadd(struct vfs_fsentry *vfe, vfstable_t *handle)
{
struct vfstable *newvfstbl = NULL;
int i, j;
int(***opv_desc_vector_p)(void *);
int(**opv_desc_vector)(void *);
const struct vnodeopv_entry_desc *opve_descp;
int desccount;
int descsize;
PFI *descptr;
/*
* This routine is responsible for all the initialization that would
* ordinarily be done as part of the system startup;
*/
if (vfe == (struct vfs_fsentry *)0) {
return EINVAL;
}
desccount = vfe->vfe_vopcnt;
if ((desccount <= 0) || ((desccount > 8)) || (vfe->vfe_vfsops == (struct vfsops *)NULL)
|| (vfe->vfe_opvdescs == (struct vnodeopv_desc **)NULL)) {
return EINVAL;
}
/* Non-threadsafe filesystems are not supported */
if ((vfe->vfe_flags & (VFS_TBLTHREADSAFE | VFS_TBLFSNODELOCK)) == 0) {
return EINVAL;
}
newvfstbl = kalloc_type(struct vfstable, Z_WAITOK | Z_ZERO);
newvfstbl->vfc_vfsops = vfe->vfe_vfsops;
strncpy(&newvfstbl->vfc_name[0], vfe->vfe_fsname, MFSNAMELEN);
if ((vfe->vfe_flags & VFS_TBLNOTYPENUM)) {
int tmp;
int found = 0;
lck_mtx_lock(&vfs_typenum_mtx);
for (tmp = fstypenumstart; tmp < OID_AUTO_START; tmp++) {
if (isclr(vfs_typenum_arr, tmp)) {
newvfstbl->vfc_typenum = tmp;
setbit(vfs_typenum_arr, tmp);
found = 1;
break;
}
}
if (!found) {
lck_mtx_unlock(&vfs_typenum_mtx);
return EINVAL;
}
if (maxvfstypenum < OID_AUTO_START) {
/* getvfsbyname checks up to but not including maxvfstypenum */
maxvfstypenum = newvfstbl->vfc_typenum + 1;
}
lck_mtx_unlock(&vfs_typenum_mtx);
} else {
newvfstbl->vfc_typenum = vfe->vfe_fstypenum;
lck_mtx_lock(&vfs_typenum_mtx);
setbit(vfs_typenum_arr, newvfstbl->vfc_typenum);
if (newvfstbl->vfc_typenum >= maxvfstypenum) {
maxvfstypenum = newvfstbl->vfc_typenum + 1;
}
lck_mtx_unlock(&vfs_typenum_mtx);
}
newvfstbl->vfc_refcount = 0;
newvfstbl->vfc_flags = 0;
newvfstbl->vfc_mountroot = NULL;
newvfstbl->vfc_next = NULL;
newvfstbl->vfc_vfsflags = 0;
if (vfe->vfe_flags & VFS_TBL64BITREADY) {
newvfstbl->vfc_vfsflags |= VFC_VFS64BITREADY;
}
if (vfe->vfe_flags & VFS_TBLVNOP_PAGEINV2) {
newvfstbl->vfc_vfsflags |= VFC_VFSVNOP_PAGEINV2;
}
if (vfe->vfe_flags & VFS_TBLVNOP_PAGEOUTV2) {
newvfstbl->vfc_vfsflags |= VFC_VFSVNOP_PAGEOUTV2;
}
if ((vfe->vfe_flags & VFS_TBLLOCALVOL) == VFS_TBLLOCALVOL) {
newvfstbl->vfc_flags |= MNT_LOCAL;
}
if ((vfe->vfe_flags & VFS_TBLLOCALVOL) && (vfe->vfe_flags & VFS_TBLGENERICMNTARGS) == 0) {
newvfstbl->vfc_vfsflags |= VFC_VFSLOCALARGS;
} else {
newvfstbl->vfc_vfsflags |= VFC_VFSGENERICARGS;
}
if (vfe->vfe_flags & VFS_TBLNATIVEXATTR) {
newvfstbl->vfc_vfsflags |= VFC_VFSNATIVEXATTR;
}
if (vfe->vfe_flags & VFS_TBLUNMOUNT_PREFLIGHT) {
newvfstbl->vfc_vfsflags |= VFC_VFSPREFLIGHT;
}
if (vfe->vfe_flags & VFS_TBLREADDIR_EXTENDED) {
newvfstbl->vfc_vfsflags |= VFC_VFSREADDIR_EXTENDED;
}
if (vfe->vfe_flags & VFS_TBLNOMACLABEL) {
newvfstbl->vfc_vfsflags |= VFC_VFSNOMACLABEL;
}
if (vfe->vfe_flags & VFS_TBLVNOP_NOUPDATEID_RENAME) {
newvfstbl->vfc_vfsflags |= VFC_VFSVNOP_NOUPDATEID_RENAME;
}
if (vfe->vfe_flags & VFS_TBLVNOP_SECLUDE_RENAME) {
newvfstbl->vfc_vfsflags |= VFC_VFSVNOP_SECLUDE_RENAME;
}
if (vfe->vfe_flags & VFS_TBLCANMOUNTROOT) {
newvfstbl->vfc_vfsflags |= VFC_VFSCANMOUNTROOT;
}
/*
* Allocate and init the vectors.
* Also handle backwards compatibility.
*
* We allocate one large block to hold all <desccount>
* vnode operation vectors stored contiguously.
*/
/* XXX - shouldn't be M_TEMP */
descsize = desccount * vfs_opv_numops;
descptr = kalloc_type(PFI, descsize, Z_WAITOK | Z_ZERO);
newvfstbl->vfc_descptr = descptr;
newvfstbl->vfc_descsize = descsize;
newvfstbl->vfc_sysctl = NULL;
for (i = 0; i < desccount; i++) {
opv_desc_vector_p = vfe->vfe_opvdescs[i]->opv_desc_vector_p;
/*
* Fill in the caller's pointer to the start of the i'th vector.
* They'll need to supply it when calling vnode_create.
*/
opv_desc_vector = descptr + i * vfs_opv_numops;
*opv_desc_vector_p = opv_desc_vector;
for (j = 0; vfe->vfe_opvdescs[i]->opv_desc_ops[j].opve_op; j++) {
opve_descp = &(vfe->vfe_opvdescs[i]->opv_desc_ops[j]);
/* Silently skip known-disabled operations */
if (opve_descp->opve_op->vdesc_flags & VDESC_DISABLED) {
printf("vfs_fsadd: Ignoring reference in %p to disabled operation %s.\n",
vfe->vfe_opvdescs[i], opve_descp->opve_op->vdesc_name);
continue;
}
/*
* Sanity check: is this operation listed
* in the list of operations? We check this
* by seeing if its offset is zero. Since
* the default routine should always be listed
* first, it should be the only one with a zero
* offset. Any other operation with a zero
* offset is probably not listed in
* vfs_op_descs, and so is probably an error.
*
* A panic here means the layer programmer
* has committed the all-too common bug
* of adding a new operation to the layer's
* list of vnode operations but
* not adding the operation to the system-wide
* list of supported operations.
*/
if (opve_descp->opve_op->vdesc_offset == 0 &&
opve_descp->opve_op != VDESC(vnop_default)) {
printf("vfs_fsadd: operation %s not listed in %s.\n",
opve_descp->opve_op->vdesc_name,
"vfs_op_descs");
panic("vfs_fsadd: bad operation");
}
/*
* Fill in this entry.
*/
opv_desc_vector[opve_descp->opve_op->vdesc_offset] =
opve_descp->opve_impl;
}
/*
* Finally, go back and replace unfilled routines
* with their default. (Sigh, an O(n^3) algorithm. I
* could make it better, but that'd be work, and n is small.)
*/
opv_desc_vector_p = vfe->vfe_opvdescs[i]->opv_desc_vector_p;
/*
* Force every operations vector to have a default routine.
*/
opv_desc_vector = *opv_desc_vector_p;
if (opv_desc_vector[VOFFSET(vnop_default)] == NULL) {
panic("vfs_fsadd: operation vector without default routine.");
}
for (j = 0; j < vfs_opv_numops; j++) {
if (opv_desc_vector[j] == NULL) {
opv_desc_vector[j] =
opv_desc_vector[VOFFSET(vnop_default)];
}
}
} /* end of each vnodeopv_desc parsing */
*handle = vfstable_add(newvfstbl);
if (newvfstbl->vfc_vfsops->vfs_init) {
struct vfsconf vfsc;
bzero(&vfsc, sizeof(struct vfsconf));
vfsc.vfc_reserved1 = 0;
bcopy((*handle)->vfc_name, vfsc.vfc_name, sizeof(vfsc.vfc_name));
vfsc.vfc_typenum = (*handle)->vfc_typenum;
vfsc.vfc_refcount = (*handle)->vfc_refcount;
vfsc.vfc_flags = (*handle)->vfc_flags;
vfsc.vfc_reserved2 = 0;
vfsc.vfc_reserved3 = 0;
(*newvfstbl->vfc_vfsops->vfs_init)(&vfsc);
}
kfree_type(struct vfstable, newvfstbl);
return 0;
}
/*
* Removes the filesystem from kernel.
* The argument passed in is the handle that was given when
* file system was added
*/
errno_t
vfs_fsremove(vfstable_t handle)
{
struct vfstable * vfstbl = (struct vfstable *)handle;
void *old_desc = NULL;
size_t descsize = 0;
errno_t err;
/* Preflight check for any mounts */
mount_list_lock();
if (vfstbl->vfc_refcount != 0) {
mount_list_unlock();
return EBUSY;
}
/* Free the spot in vfs_typenum_arr */
lck_mtx_lock(&vfs_typenum_mtx);
clrbit(vfs_typenum_arr, handle->vfc_typenum);
if (maxvfstypenum == handle->vfc_typenum) {
maxvfstypenum--;
}
lck_mtx_unlock(&vfs_typenum_mtx);
/*
* save the old descriptor; the free cannot occur unconditionally,
* since vfstable_del() may fail.
*/
if (vfstbl->vfc_descptr && vfstbl->vfc_descsize) {
old_desc = vfstbl->vfc_descptr;
descsize = vfstbl->vfc_descsize;
}
err = vfstable_del(vfstbl);
mount_list_unlock();
/* free the descriptor if the delete was successful */
if (err == 0) {
kfree_type(PFI, descsize, old_desc);
}
return err;
}
void
vfs_setowner(mount_t mp, uid_t uid, gid_t gid)
{
mp->mnt_fsowner = uid;
mp->mnt_fsgroup = gid;
}
/*
* Callers should be careful how they use this; accessing
* mnt_last_write_completed_timestamp is not thread-safe. Writing to
* it isn't either. Point is: be prepared to deal with strange values
* being returned.
*/
uint64_t
vfs_idle_time(mount_t mp)
{
if (mp->mnt_pending_write_size) {
return 0;
}
struct timeval now;
microuptime(&now);
return (now.tv_sec
- mp->mnt_last_write_completed_timestamp.tv_sec) * 1000000
+ now.tv_usec - mp->mnt_last_write_completed_timestamp.tv_usec;
}
/*
* vfs_context_create_with_proc() takes a reference on an arbitrary
* thread in the process. To distinguish this reference-counted thread
* from the usual non-reference-counted thread, we set the least significant
* bit of of vc_thread.
*/
#define VFS_CONTEXT_THREAD_IS_REFERENCED(ctx) \
(!!(((uintptr_t)(ctx)->vc_thread) & 1UL))
#define VFS_CONTEXT_SET_REFERENCED_THREAD(ctx, thr) \
(ctx)->vc_thread = (thread_t)(((uintptr_t)(thr)) | 1UL)
#define VFS_CONTEXT_GET_THREAD(ctx) \
((thread_t)(((uintptr_t)(ctx)->vc_thread) & ~1UL))
int
vfs_context_pid(vfs_context_t ctx)
{
return proc_pid(vfs_context_proc(ctx));
}
int
vfs_context_copy_audit_token(vfs_context_t ctx, audit_token_t *token)
{
kern_return_t err;
task_t task;
mach_msg_type_number_t info_size = TASK_AUDIT_TOKEN_COUNT;
task = vfs_context_task(ctx);
if (task == NULL) {
// Not sure how this would happen; we are supposed to be
// in the middle of using the context. Regardless, don't
// wander off a NULL pointer.
return ESRCH;
}
err = task_info(task, TASK_AUDIT_TOKEN, (integer_t *)token, &info_size);
return (err) ? ESRCH : 0;
}
int
vfs_context_suser(vfs_context_t ctx)
{
return suser(ctx->vc_ucred, NULL);
}
/*
* Return bit field of signals posted to all threads in the context's process.
*
* XXX Signals should be tied to threads, not processes, for most uses of this
* XXX call.
*/
int
vfs_context_issignal(vfs_context_t ctx, sigset_t mask)
{
proc_t p = vfs_context_proc(ctx);
if (p) {
return proc_pendingsignals(p, mask);
}
return 0;
}
int
vfs_context_is64bit(vfs_context_t ctx)
{
uthread_t uth;
thread_t t;
if (ctx != NULL && (t = VFS_CONTEXT_GET_THREAD(ctx)) != NULL) {
uth = get_bsdthread_info(t);
} else {
uth = current_uthread();
}
return uthread_is64bit(uth);
}
boolean_t
vfs_context_can_resolve_triggers(vfs_context_t ctx)
{
proc_t proc = vfs_context_proc(ctx);
if (proc) {
if (proc->p_vfs_iopolicy &
P_VFS_IOPOLICY_TRIGGER_RESOLVE_DISABLE) {
return false;
}
return true;
}
return false;
}
boolean_t
vfs_context_can_break_leases(vfs_context_t ctx)
{
proc_t proc = vfs_context_proc(ctx);
if (proc) {
/*
* We do not have a separate I/O policy for this,
* because the scenarios where we would not want
* local file lease breaks are currently exactly
* the same as where we would not want dataless
* file materialization (mainly, system daemons
* passively snooping file activity).
*/
if (proc->p_vfs_iopolicy &
P_VFS_IOPOLICY_MATERIALIZE_DATALESS_FILES) {
return true;
}
return false;
}
return true;
}
boolean_t
vfs_context_allow_fs_blksize_nocache_write(vfs_context_t ctx)
{
uthread_t uth;
thread_t t;
proc_t p;
if ((ctx == NULL) || (t = VFS_CONTEXT_GET_THREAD(ctx)) == NULL) {
return FALSE;
}
uth = get_bsdthread_info(t);
if (uth && (uth->uu_flag & UT_FS_BLKSIZE_NOCACHE_WRITES)) {
return TRUE;
}
p = (proc_t)get_bsdthreadtask_info(t);
if (p && (os_atomic_load(&p->p_vfs_iopolicy, relaxed) & P_VFS_IOPOLICY_NOCACHE_WRITE_FS_BLKSIZE)) {
return TRUE;
}
return FALSE;
}
/*
* vfs_context_proc
*
* Description: Given a vfs_context_t, return the proc_t associated with it.
*
* Parameters: vfs_context_t The context to use
*
* Returns: proc_t The process for this context
*
* Notes: This function will return the current_proc() if any of the
* following conditions are true:
*
* o The supplied context pointer is NULL
* o There is no Mach thread associated with the context
* o There is no Mach task associated with the Mach thread
* o There is no proc_t associated with the Mach task
* o The proc_t has no per process open file table
*
* This causes this function to return a value matching as
* closely as possible the previous behaviour.
*/
proc_t
vfs_context_proc(vfs_context_t ctx)
{
proc_t proc = NULL;
thread_t t;
if (ctx != NULL && (t = VFS_CONTEXT_GET_THREAD(ctx)) != NULL) {
proc = (proc_t)get_bsdthreadtask_info(t);
}
return proc == NULL ? current_proc() : proc;
}
/*
* vfs_context_get_special_port
*
* Description: Return the requested special port from the task associated
* with the given context.
*
* Parameters: vfs_context_t The context to use
* int Index of special port
* ipc_port_t * Pointer to returned port
*
* Returns: kern_return_t see task_get_special_port()
*/
kern_return_t
vfs_context_get_special_port(vfs_context_t ctx, int which, ipc_port_t *portp)
{
return task_get_special_port(vfs_context_task(ctx), which, portp);
}
/*
* vfs_context_set_special_port
*
* Description: Set the requested special port in the task associated
* with the given context.
*
* Parameters: vfs_context_t The context to use
* int Index of special port
* ipc_port_t New special port
*
* Returns: kern_return_t see task_set_special_port_internal()
*/
kern_return_t
vfs_context_set_special_port(vfs_context_t ctx, int which, ipc_port_t port)
{
return task_set_special_port_internal(vfs_context_task(ctx),
which, port);
}
/*
* vfs_context_thread
*
* Description: Return the Mach thread associated with a vfs_context_t
*
* Parameters: vfs_context_t The context to use
*
* Returns: thread_t The thread for this context, or
* NULL, if there is not one.
*
* Notes: NULL thread_t's are legal, but discouraged. They occur only
* as a result of a static vfs_context_t declaration in a function
* and will result in this function returning NULL.
*
* This is intentional; this function should NOT return the
* current_thread() in this case.
*/
thread_t
vfs_context_thread(vfs_context_t ctx)
{
return VFS_CONTEXT_GET_THREAD(ctx);
}
/*
* vfs_context_task
*
* Description: Return the Mach task associated with a vfs_context_t
*
* Parameters: vfs_context_t The context to use
*
* Returns: task_t The task for this context, or
* NULL, if there is not one.
*
* Notes: NULL task_t's are legal, but discouraged. They occur only
* as a result of a static vfs_context_t declaration in a function
* and will result in this function returning NULL.
*
* This is intentional; this function should NOT return the
* task associated with current_thread() in this case.
*/
task_t
vfs_context_task(vfs_context_t ctx)
{
task_t task = NULL;
thread_t t;
if (ctx != NULL && (t = VFS_CONTEXT_GET_THREAD(ctx)) != NULL) {
task = get_threadtask(t);
}
return task;
}
/*
* vfs_context_cwd
*
* Description: Returns a reference on the vnode for the current working
* directory for the supplied context
*
* Parameters: vfs_context_t The context to use
*
* Returns: vnode_t The current working directory
* for this context
*
* Notes: The function first attempts to obtain the current directory
* from the thread, and if it is not present there, falls back
* to obtaining it from the process instead. If it can't be
* obtained from either place, we return NULLVP.
*/
vnode_t
vfs_context_cwd(vfs_context_t ctx)
{
vnode_t cwd = NULLVP;
thread_t t;
if (ctx != NULL && (t = VFS_CONTEXT_GET_THREAD(ctx)) != NULL) {
uthread_t uth = get_bsdthread_info(t);
proc_t proc;
/*
* Get the cwd from the thread; if there isn't one, get it
* from the process, instead.
*/
if ((cwd = uth->uu_cdir) == NULLVP &&
(proc = (proc_t)get_bsdthreadtask_info(t)) != NULL) {
cwd = proc->p_fd.fd_cdir;
}
}
return cwd;
}
/*
* vfs_context_create
*
* Description: Allocate and initialize a new context.
*
* Parameters: vfs_context_t: Context to copy, or NULL for new
*
* Returns: Pointer to new context
*
* Notes: Copy cred and thread from argument, if available; else
* initialize with current thread and new cred. Returns
* with a reference held on the credential.
*/
vfs_context_t
vfs_context_create(vfs_context_t ctx)
{
vfs_context_t newcontext;
newcontext = zalloc_flags(KT_VFS_CONTEXT, Z_WAITOK | Z_ZERO | Z_NOFAIL);
if (ctx == NULL) {
ctx = vfs_context_current();
}
*newcontext = *ctx;
if (IS_VALID_CRED(ctx->vc_ucred)) {
kauth_cred_ref(ctx->vc_ucred);
}
return newcontext;
}
/*
* vfs_context_create_with_proc
*
* Description: Create a new context with credentials taken from
* the specified proc.
*
* Parameters: proc_t: The process whose crendials to use.
*
* Returns: Pointer to new context.
*
* Notes: The context will also take a reference on an arbitrary
* thread in the process as well as the process's credentials.
*/
vfs_context_t
vfs_context_create_with_proc(proc_t p)
{
vfs_context_t newcontext;
thread_t thread;
kauth_cred_t cred;
if (p == current_proc()) {
return vfs_context_create(NULL);
}
newcontext = zalloc_flags(KT_VFS_CONTEXT, Z_WAITOK | Z_ZERO | Z_NOFAIL);
proc_lock(p);
thread = proc_thread(p); /* XXX */
if (thread != NULL) {
thread_reference(thread);
}
proc_unlock(p);
cred = kauth_cred_proc_ref(p);
VFS_CONTEXT_SET_REFERENCED_THREAD(newcontext, thread);
newcontext->vc_ucred = cred;
return newcontext;
}
vfs_context_t
vfs_context_current(void)
{
static_assert(offsetof(struct thread_ro, tro_owner) ==
offsetof(struct vfs_context, vc_thread));
static_assert(offsetof(struct thread_ro, tro_cred) ==
offsetof(struct vfs_context, vc_ucred));
return (vfs_context_t)current_thread_ro();
}
vfs_context_t
vfs_context_kernel(void)
{
return &vfs_context0;
}
int
vfs_context_rele(vfs_context_t ctx)
{
if (ctx) {
if (IS_VALID_CRED(ctx->vc_ucred)) {
kauth_cred_unref(&ctx->vc_ucred);
}
if (VFS_CONTEXT_THREAD_IS_REFERENCED(ctx)) {
assert(VFS_CONTEXT_GET_THREAD(ctx) != NULL);
thread_deallocate(VFS_CONTEXT_GET_THREAD(ctx));
}
zfree(KT_VFS_CONTEXT, ctx);
}
return 0;
}
kauth_cred_t
vfs_context_ucred(vfs_context_t ctx)
{
return ctx->vc_ucred;
}
/*
* Return true if the context is owned by the superuser.
*/
int
vfs_context_issuser(vfs_context_t ctx)
{
return kauth_cred_issuser(vfs_context_ucred(ctx));
}
int
vfs_context_iskernel(vfs_context_t ctx)
{
return ctx == &vfs_context0;
}
/*
* Given a context, for all fields of vfs_context_t which
* are not held with a reference, set those fields to the
* values for the current execution context.
*
* Returns: 0 for success, nonzero for failure
*
* The intended use is:
* 1. vfs_context_create() gets the caller a context
* 2. vfs_context_bind() sets the unrefcounted data
* 3. vfs_context_rele() releases the context
*
*/
int
vfs_context_bind(vfs_context_t ctx)
{
assert(!VFS_CONTEXT_THREAD_IS_REFERENCED(ctx));
ctx->vc_thread = current_thread();
return 0;
}
int
vfs_set_thread_fs_private(uint8_t tag, uint64_t fs_private)
{
struct uthread *ut;
if (tag != FS_PRIVATE_TAG_APFS) {
return ENOTSUP;
}
ut = current_uthread();
ut->t_fs_private = fs_private;
return 0;
}
int
vfs_get_thread_fs_private(uint8_t tag, uint64_t *fs_private)
{
struct uthread *ut;
if (tag != FS_PRIVATE_TAG_APFS) {
return ENOTSUP;
}
ut = current_uthread();
*fs_private = ut->t_fs_private;
return 0;
}
int
vfs_isswapmount(mount_t mnt)
{
return mnt && ISSET(mnt->mnt_kern_flag, MNTK_SWAP_MOUNT) ? 1 : 0;
}
/* XXXXXXXXXXXXXX VNODE KAPIS XXXXXXXXXXXXXXXXXXXXXXXXX */
/*
* Convert between vnode types and inode formats (since POSIX.1
* defines mode word of stat structure in terms of inode formats).
*/
enum vtype
vnode_iftovt(int mode)
{
return iftovt_tab[((mode) & S_IFMT) >> 12];
}
int
vnode_vttoif(enum vtype indx)
{
return vttoif_tab[(int)(indx)];
}
int
vnode_makeimode(int indx, int mode)
{
return (int)(VTTOIF(indx) | (mode));
}
/*
* vnode manipulation functions.
*/
/* returns system root vnode iocount; It should be released using vnode_put() */
vnode_t
vfs_rootvnode(void)
{
vnode_t vp = NULLVP;
if (rootvnode) {
lck_rw_lock_shared(&rootvnode_rw_lock);
vp = rootvnode;
if (vp && (vnode_get(vp) != 0)) {
vp = NULLVP;
}
lck_rw_unlock_shared(&rootvnode_rw_lock);
}
return vp;
}
uint32_t
vnode_vid(vnode_t vp)
{
return (uint32_t)(vp->v_id);
}
mount_t
vnode_mount(vnode_t vp)
{
return vp->v_mount;
}
#if CONFIG_IOSCHED
vnode_t
vnode_mountdevvp(vnode_t vp)
{
if (vp->v_mount) {
return vp->v_mount->mnt_devvp;
} else {
return (vnode_t)0;
}
}
#endif
boolean_t
vnode_isonexternalstorage(vnode_t vp)
{
if (vp) {
if (vp->v_mount) {
if (vp->v_mount->mnt_ioflags & MNT_IOFLAGS_PERIPHERAL_DRIVE) {
return TRUE;
}
}
}
return FALSE;
}
boolean_t
vnode_isonssd(vnode_t vp)
{
if (vp) {
if (vp->v_mount) {
if (vp->v_mount->mnt_kern_flag & MNTK_SSD) {
return TRUE;
}
}
}
return FALSE;
}
mount_t
vnode_mountedhere(vnode_t vp)
{
mount_t mp;
if ((vp->v_type == VDIR) && ((mp = vp->v_mountedhere) != NULL) &&
(mp->mnt_vnodecovered == vp)) {
return mp;
} else {
return (mount_t)NULL;
}
}
/* returns vnode type of vnode_t */
enum vtype
vnode_vtype(vnode_t vp)
{
return vp->v_type;
}
/* returns FS specific node saved in vnode */
void *
vnode_fsnode(vnode_t vp)
{
return vp->v_data;
}
void
vnode_clearfsnode(vnode_t vp)
{
vp->v_data = NULL;
}
dev_t
vnode_specrdev(vnode_t vp)
{
return vp->v_rdev;
}
/* Accessor functions */
/* is vnode_t a root vnode */
int
vnode_isvroot(vnode_t vp)
{
return (vp->v_flag & VROOT)? 1 : 0;
}
/* is vnode_t a system vnode */
int
vnode_issystem(vnode_t vp)
{
return (vp->v_flag & VSYSTEM)? 1 : 0;
}
/* is vnode_t a swap file vnode */
int
vnode_isswap(vnode_t vp)
{
return (vp->v_flag & VSWAP)? 1 : 0;
}
/* is vnode_t a tty */
int
vnode_istty(vnode_t vp)
{
return (vp->v_flag & VISTTY) ? 1 : 0;
}
/* if vnode_t mount operation in progress */
int
vnode_ismount(vnode_t vp)
{
return (vp->v_flag & VMOUNT)? 1 : 0;
}
/* is this vnode under recyle now */
int
vnode_isrecycled(vnode_t vp)
{
int ret;
vnode_lock_spin(vp);
ret = (vp->v_lflag & (VL_TERMINATE | VL_DEAD))? 1 : 0;
vnode_unlock(vp);
return ret;
}
/* is this vnode marked for termination */
int
vnode_willberecycled(vnode_t vp)
{
return (vp->v_lflag & VL_MARKTERM) ? 1 : 0;
}
/* vnode was created by background task requesting rapid aging
* and has not since been referenced by a normal task */
int
vnode_israge(vnode_t vp)
{
return (vp->v_flag & VRAGE)? 1 : 0;
}
int
vnode_needssnapshots(__unused vnode_t vp)
{
return 0;
}
/* Check the process/thread to see if we should skip atime updates */
int
vfs_ctx_skipatime(vfs_context_t ctx)
{
struct uthread *ut;
proc_t proc;
thread_t thr;
proc = vfs_context_proc(ctx);
thr = vfs_context_thread(ctx);
/* Validate pointers in case we were invoked via a kernel context */
if (thr && proc) {
ut = get_bsdthread_info(thr);
if (proc->p_lflag & P_LRAGE_VNODES) {
return 1;
}
if (ut) {
if (ut->uu_flag & (UT_RAGE_VNODES | UT_ATIME_UPDATE)) {
return 1;
}
}
if (proc->p_vfs_iopolicy & P_VFS_IOPOLICY_ATIME_UPDATES) {
return 1;
}
}
return 0;
}
/* is vnode_t marked to not keep data cached once it's been consumed */
int
vnode_isnocache(vnode_t vp)
{
return (vp->v_flag & VNOCACHE_DATA)? 1 : 0;
}
/*
* has sequential readahead been disabled on this vnode
*/
int
vnode_isnoreadahead(vnode_t vp)
{
return (vp->v_flag & VRAOFF)? 1 : 0;
}
int
vnode_is_openevt(vnode_t vp)
{
return (vp->v_flag & VOPENEVT)? 1 : 0;
}
/* is vnode_t a standard one? */
int
vnode_isstandard(vnode_t vp)
{
return (vp->v_flag & VSTANDARD)? 1 : 0;
}
/* don't vflush() if SKIPSYSTEM */
int
vnode_isnoflush(vnode_t vp)
{
return (vp->v_flag & VNOFLUSH)? 1 : 0;
}
/* is vnode_t a regular file */
int
vnode_isreg(vnode_t vp)
{
return (vp->v_type == VREG)? 1 : 0;
}
/* is vnode_t a directory? */
int
vnode_isdir(vnode_t vp)
{
return (vp->v_type == VDIR)? 1 : 0;
}
/* is vnode_t a symbolic link ? */
int
vnode_islnk(vnode_t vp)
{
return (vp->v_type == VLNK)? 1 : 0;
}
int
vnode_lookup_continue_needed(vnode_t vp, struct componentname *cnp)
{
struct nameidata *ndp = cnp->cn_ndp;
if (ndp == NULL) {
panic("vnode_lookup_continue_needed(): cnp->cn_ndp is NULL");
}
if (vnode_isdir(vp)) {
if (vp->v_mountedhere != NULL) {
goto yes;
}
#if CONFIG_TRIGGERS
if (vp->v_resolve) {
goto yes;
}
#endif /* CONFIG_TRIGGERS */
}
if (vnode_islnk(vp)) {
/* From lookup(): || *ndp->ni_next == '/') No need for this, we know we're NULL-terminated here */
if (cnp->cn_flags & FOLLOW) {
goto yes;
}
if (ndp->ni_flag & NAMEI_TRAILINGSLASH) {
goto yes;
}
}
return 0;
yes:
ndp->ni_flag |= NAMEI_CONTLOOKUP;
return EKEEPLOOKING;
}
/* is vnode_t a fifo ? */
int
vnode_isfifo(vnode_t vp)
{
return (vp->v_type == VFIFO)? 1 : 0;
}
/* is vnode_t a block device? */
int
vnode_isblk(vnode_t vp)
{
return (vp->v_type == VBLK)? 1 : 0;
}
int
vnode_isspec(vnode_t vp)
{
return ((vp->v_type == VCHR) || (vp->v_type == VBLK)) ? 1 : 0;
}
/* is vnode_t a char device? */
int
vnode_ischr(vnode_t vp)
{
return (vp->v_type == VCHR)? 1 : 0;
}
/* is vnode_t a socket? */
int
vnode_issock(vnode_t vp)
{
return (vp->v_type == VSOCK)? 1 : 0;
}
/* is vnode_t a device with multiple active vnodes referring to it? */
int
vnode_isaliased(vnode_t vp)
{
enum vtype vt = vp->v_type;
if (!((vt == VCHR) || (vt == VBLK))) {
return 0;
} else {
return vp->v_specflags & SI_ALIASED;
}
}
/* is vnode_t a named stream? */
int
vnode_isnamedstream(
#if NAMEDSTREAMS
vnode_t vp
#else
__unused vnode_t vp
#endif
)
{
#if NAMEDSTREAMS
return (vp->v_flag & VISNAMEDSTREAM) ? 1 : 0;
#else
return 0;
#endif
}
int
vnode_isshadow(
#if NAMEDSTREAMS
vnode_t vp
#else
__unused vnode_t vp
#endif
)
{
#if NAMEDSTREAMS
return (vp->v_flag & VISSHADOW) ? 1 : 0;
#else
return 0;
#endif
}
/* does vnode have associated named stream vnodes ? */
int
vnode_hasnamedstreams(
#if NAMEDSTREAMS
vnode_t vp
#else
__unused vnode_t vp
#endif
)
{
#if NAMEDSTREAMS
return (vp->v_lflag & VL_HASSTREAMS) ? 1 : 0;
#else
return 0;
#endif
}
/* TBD: set vnode_t to not cache data after it is consumed once; used for quota */
void
vnode_setnocache(vnode_t vp)
{
vnode_lock_spin(vp);
vp->v_flag |= VNOCACHE_DATA;
vnode_unlock(vp);
}
void
vnode_clearnocache(vnode_t vp)
{
vnode_lock_spin(vp);
vp->v_flag &= ~VNOCACHE_DATA;
vnode_unlock(vp);
}
void
vnode_set_openevt(vnode_t vp)
{
vnode_lock_spin(vp);
vp->v_flag |= VOPENEVT;
vnode_unlock(vp);
}
void
vnode_clear_openevt(vnode_t vp)
{
vnode_lock_spin(vp);
vp->v_flag &= ~VOPENEVT;
vnode_unlock(vp);
}
void
vnode_setnoreadahead(vnode_t vp)
{
vnode_lock_spin(vp);
vp->v_flag |= VRAOFF;
vnode_unlock(vp);
}
void
vnode_clearnoreadahead(vnode_t vp)
{
vnode_lock_spin(vp);
vp->v_flag &= ~VRAOFF;
vnode_unlock(vp);
}
int
vnode_isfastdevicecandidate(vnode_t vp)
{
return (vp->v_flag & VFASTDEVCANDIDATE)? 1 : 0;
}
void
vnode_setfastdevicecandidate(vnode_t vp)
{
vnode_lock_spin(vp);
vp->v_flag |= VFASTDEVCANDIDATE;
vnode_unlock(vp);
}
void
vnode_clearfastdevicecandidate(vnode_t vp)
{
vnode_lock_spin(vp);
vp->v_flag &= ~VFASTDEVCANDIDATE;
vnode_unlock(vp);
}
int
vnode_isautocandidate(vnode_t vp)
{
return (vp->v_flag & VAUTOCANDIDATE)? 1 : 0;
}
void
vnode_setautocandidate(vnode_t vp)
{
vnode_lock_spin(vp);
vp->v_flag |= VAUTOCANDIDATE;
vnode_unlock(vp);
}
void
vnode_clearautocandidate(vnode_t vp)
{
vnode_lock_spin(vp);
vp->v_flag &= ~VAUTOCANDIDATE;
vnode_unlock(vp);
}
/* mark vnode_t to skip vflush() is SKIPSYSTEM */
void
vnode_setnoflush(vnode_t vp)
{
vnode_lock_spin(vp);
vp->v_flag |= VNOFLUSH;
vnode_unlock(vp);
}
void
vnode_clearnoflush(vnode_t vp)
{
vnode_lock_spin(vp);
vp->v_flag &= ~VNOFLUSH;
vnode_unlock(vp);
}
/* is vnode_t a blkdevice and has a FS mounted on it */
int
vnode_ismountedon(vnode_t vp)
{
return (vp->v_specflags & SI_MOUNTEDON)? 1 : 0;
}
void
vnode_setmountedon(vnode_t vp)
{
vnode_lock_spin(vp);
vp->v_specflags |= SI_MOUNTEDON;
vnode_unlock(vp);
}
void
vnode_clearmountedon(vnode_t vp)
{
vnode_lock_spin(vp);
vp->v_specflags &= ~SI_MOUNTEDON;
vnode_unlock(vp);
}
void
vnode_settag(vnode_t vp, int tag)
{
/*
* We only assign enum values to v_tag, but add an assert to make sure we
* catch it in dev/debug builds if this ever change.
*/
assert(tag >= SHRT_MIN && tag <= SHRT_MAX);
vp->v_tag = (uint16_t)tag;
}
int
vnode_tag(vnode_t vp)
{
return vp->v_tag;
}
vnode_t
vnode_parent(vnode_t vp)
{
return vp->v_parent;
}
void
vnode_setparent(vnode_t vp, vnode_t dvp)
{
vp->v_parent = dvp;
}
void
vnode_setname(vnode_t vp, char * name)
{
vp->v_name = name;
}
/* return the registered FS name when adding the FS to kernel */
void
vnode_vfsname(vnode_t vp, char * buf)
{
strlcpy(buf, vp->v_mount->mnt_vtable->vfc_name, MFSNAMELEN);
}
/* return the FS type number */
int
vnode_vfstypenum(vnode_t vp)
{
return vp->v_mount->mnt_vtable->vfc_typenum;
}
int
vnode_vfs64bitready(vnode_t vp)
{
/*
* Checking for dead_mountp is a bit of a hack for SnowLeopard: <rdar://problem/6269051>
*/
if ((vp->v_mount != dead_mountp) && (vp->v_mount->mnt_vtable->vfc_vfsflags & VFC_VFS64BITREADY)) {
return 1;
} else {
return 0;
}
}
/* return the visible flags on associated mount point of vnode_t */
uint32_t
vnode_vfsvisflags(vnode_t vp)
{
return vp->v_mount->mnt_flag & MNT_VISFLAGMASK;
}
/* return the command modifier flags on associated mount point of vnode_t */
uint32_t
vnode_vfscmdflags(vnode_t vp)
{
return vp->v_mount->mnt_flag & MNT_CMDFLAGS;
}
/* return the max symlink of short links of vnode_t */
uint32_t
vnode_vfsmaxsymlen(vnode_t vp)
{
return vp->v_mount->mnt_maxsymlinklen;
}
/* return a pointer to the RO vfs_statfs associated with vnode_t's mount point */
struct vfsstatfs *
vnode_vfsstatfs(vnode_t vp)
{
return &vp->v_mount->mnt_vfsstat;
}
/* return a handle to the FSs specific private handle associated with vnode_t's mount point */
void *
vnode_vfsfsprivate(vnode_t vp)
{
return vp->v_mount->mnt_data;
}
/* is vnode_t in a rdonly mounted FS */
int
vnode_vfsisrdonly(vnode_t vp)
{
return (vp->v_mount->mnt_flag & MNT_RDONLY)? 1 : 0;
}
int
vnode_compound_rename_available(vnode_t vp)
{
return vnode_compound_op_available(vp, COMPOUND_VNOP_RENAME);
}
int
vnode_compound_rmdir_available(vnode_t vp)
{
return vnode_compound_op_available(vp, COMPOUND_VNOP_RMDIR);
}
int
vnode_compound_mkdir_available(vnode_t vp)
{
return vnode_compound_op_available(vp, COMPOUND_VNOP_MKDIR);
}
int
vnode_compound_remove_available(vnode_t vp)
{
return vnode_compound_op_available(vp, COMPOUND_VNOP_REMOVE);
}
int
vnode_compound_open_available(vnode_t vp)
{
return vnode_compound_op_available(vp, COMPOUND_VNOP_OPEN);
}
int
vnode_compound_op_available(vnode_t vp, compound_vnop_id_t opid)
{
return (vp->v_mount->mnt_compound_ops & opid) != 0;
}
/*
* Returns vnode ref to current working directory; if a per-thread current
* working directory is in effect, return that instead of the per process one.
*
* XXX Published, but not used.
*/
vnode_t
current_workingdir(void)
{
return vfs_context_cwd(vfs_context_current());
}
/*
* Get a filesec and optional acl contents from an extended attribute.
* Function will attempt to retrive ACL, UUID, and GUID information using a
* read of a named extended attribute (KAUTH_FILESEC_XATTR).
*
* Parameters: vp The vnode on which to operate.
* fsecp The filesec (and ACL, if any) being
* retrieved.
* ctx The vnode context in which the
* operation is to be attempted.
*
* Returns: 0 Success
* !0 errno value
*
* Notes: The kauth_filesec_t in '*fsecp', if retrieved, will be in
* host byte order, as will be the ACL contents, if any.
* Internally, we will cannonize these values from network (PPC)
* byte order after we retrieve them so that the on-disk contents
* of the extended attribute are identical for both PPC and Intel
* (if we were not being required to provide this service via
* fallback, this would be the job of the filesystem
* 'VNOP_GETATTR' call).
*
* We use ntohl() because it has a transitive property on Intel
* machines and no effect on PPC mancines. This guarantees us
*
* XXX: Deleting rather than ignoreing a corrupt security structure is
* probably the only way to reset it without assistance from an
* file system integrity checking tool. Right now we ignore it.
*
* XXX: We should enummerate the possible errno values here, and where
* in the code they originated.
*/
static int
vnode_get_filesec(vnode_t vp, kauth_filesec_t *fsecp, vfs_context_t ctx)
{
kauth_filesec_t fsec;
uio_t fsec_uio;
size_t fsec_size;
size_t xsize, rsize;
int error;
uint32_t host_fsec_magic;
uint32_t host_acl_entrycount;
fsec = NULL;
fsec_uio = NULL;
/* find out how big the EA is */
error = vn_getxattr(vp, KAUTH_FILESEC_XATTR, NULL, &xsize, XATTR_NOSECURITY, ctx);
if (error != 0) {
/* no EA, no filesec */
if ((error == ENOATTR) || (error == ENOENT) || (error == EJUSTRETURN)) {
error = 0;
}
/* either way, we are done */
goto out;
}
/*
* To be valid, a kauth_filesec_t must be large enough to hold a zero
* ACE entrly ACL, and if it's larger than that, it must have the right
* number of bytes such that it contains an atomic number of ACEs,
* rather than partial entries. Otherwise, we ignore it.
*/
if (!KAUTH_FILESEC_VALID(xsize)) {
KAUTH_DEBUG(" ERROR - Bogus kauth_fiilesec_t: %ld bytes", xsize);
error = 0;
goto out;
}
/* how many entries would fit? */
fsec_size = KAUTH_FILESEC_COUNT(xsize);
if (fsec_size > KAUTH_ACL_MAX_ENTRIES) {
KAUTH_DEBUG(" ERROR - Bogus (too large) kauth_fiilesec_t: %ld bytes", xsize);
error = 0;
goto out;
}
/* get buffer and uio */
if (((fsec = kauth_filesec_alloc((int)fsec_size)) == NULL) ||
((fsec_uio = uio_create(1, 0, UIO_SYSSPACE, UIO_READ)) == NULL) ||
uio_addiov(fsec_uio, CAST_USER_ADDR_T(fsec), xsize)) {
KAUTH_DEBUG(" ERROR - could not allocate iov to read ACL");
error = ENOMEM;
goto out;
}
/* read security attribute */
rsize = xsize;
if ((error = vn_getxattr(vp,
KAUTH_FILESEC_XATTR,
fsec_uio,
&rsize,
XATTR_NOSECURITY,
ctx)) != 0) {
/* no attribute - no security data */
if ((error == ENOATTR) || (error == ENOENT) || (error == EJUSTRETURN)) {
error = 0;
}
/* either way, we are done */
goto out;
}
/*
* Validate security structure; the validation must take place in host
* byte order. If it's corrupt, we will just ignore it.
*/
/* Validate the size before trying to convert it */
if (rsize < KAUTH_FILESEC_SIZE(0)) {
KAUTH_DEBUG("ACL - DATA TOO SMALL (%d)", rsize);
goto out;
}
/* Validate the magic number before trying to convert it */
host_fsec_magic = ntohl(KAUTH_FILESEC_MAGIC);
if (fsec->fsec_magic != host_fsec_magic) {
KAUTH_DEBUG("ACL - BAD MAGIC %x", host_fsec_magic);
goto out;
}
/* Validate the entry count before trying to convert it. */
host_acl_entrycount = ntohl(fsec->fsec_acl.acl_entrycount);
if (host_acl_entrycount != KAUTH_FILESEC_NOACL) {
if (host_acl_entrycount > KAUTH_ACL_MAX_ENTRIES) {
KAUTH_DEBUG("ACL - BAD ENTRYCOUNT %x", host_acl_entrycount);
goto out;
}
if (KAUTH_FILESEC_SIZE(host_acl_entrycount) > rsize) {
KAUTH_DEBUG("ACL - BUFFER OVERFLOW (%d entries too big for %d)", host_acl_entrycount, rsize);
goto out;
}
}
kauth_filesec_acl_setendian(KAUTH_ENDIAN_HOST, fsec, NULL);
*fsecp = fsec;
fsec = NULL;
error = 0;
out:
if (fsec != NULL) {
kauth_filesec_free(fsec);
}
if (fsec_uio != NULL) {
uio_free(fsec_uio);
}
if (error) {
*fsecp = NULL;
}
return error;
}
/*
* Set a filesec and optional acl contents into an extended attribute.
* function will attempt to store ACL, UUID, and GUID information using a
* write to a named extended attribute (KAUTH_FILESEC_XATTR). The 'acl'
* may or may not point to the `fsec->fsec_acl`, depending on whether the
* original caller supplied an acl.
*
* Parameters: vp The vnode on which to operate.
* fsec The filesec being set.
* acl The acl to be associated with 'fsec'.
* ctx The vnode context in which the
* operation is to be attempted.
*
* Returns: 0 Success
* !0 errno value
*
* Notes: Both the fsec and the acl are always valid.
*
* The kauth_filesec_t in 'fsec', if any, is in host byte order,
* as are the acl contents, if they are used. Internally, we will
* cannonize these values into network (PPC) byte order before we
* attempt to write them so that the on-disk contents of the
* extended attribute are identical for both PPC and Intel (if we
* were not being required to provide this service via fallback,
* this would be the job of the filesystem 'VNOP_SETATTR' call).
* We reverse this process on the way out, so we leave with the
* same byte order we started with.
*
* XXX: We should enummerate the possible errno values here, and where
* in the code they originated.
*/
static int
vnode_set_filesec(vnode_t vp, kauth_filesec_t fsec, kauth_acl_t acl, vfs_context_t ctx)
{
uio_t fsec_uio;
int error;
uint32_t saved_acl_copysize;
fsec_uio = NULL;
if ((fsec_uio = uio_create(2, 0, UIO_SYSSPACE, UIO_WRITE)) == NULL) {
KAUTH_DEBUG(" ERROR - could not allocate iov to write ACL");
error = ENOMEM;
goto out;
}
/*
* Save the pre-converted ACL copysize, because it gets swapped too
* if we are running with the wrong endianness.
*/
saved_acl_copysize = KAUTH_ACL_COPYSIZE(acl);
kauth_filesec_acl_setendian(KAUTH_ENDIAN_DISK, fsec, acl);
uio_addiov(fsec_uio, CAST_USER_ADDR_T(fsec), KAUTH_FILESEC_SIZE(0) - KAUTH_ACL_SIZE(KAUTH_FILESEC_NOACL));
uio_addiov(fsec_uio, CAST_USER_ADDR_T(acl), saved_acl_copysize);
error = vn_setxattr(vp,
KAUTH_FILESEC_XATTR,
fsec_uio,
XATTR_NOSECURITY, /* we have auth'ed already */
ctx);
VFS_DEBUG(ctx, vp, "SETATTR - set ACL returning %d", error);
kauth_filesec_acl_setendian(KAUTH_ENDIAN_HOST, fsec, acl);
out:
if (fsec_uio != NULL) {
uio_free(fsec_uio);
}
return error;
}
/*
* Handle uid/gid == 99 and MNT_IGNORE_OWNERSHIP here.
*/
void
vnode_attr_handle_uid_and_gid(struct vnode_attr *vap, mount_t mp, vfs_context_t ctx)
{
uid_t nuid;
gid_t ngid;
bool is_suser = vfs_context_issuser(ctx) ? true : false;
if (VATTR_IS_ACTIVE(vap, va_uid)) {
if (is_suser && VATTR_IS_SUPPORTED(vap, va_uid)) {
nuid = vap->va_uid;
} else if (mp->mnt_flag & MNT_IGNORE_OWNERSHIP) {
nuid = mp->mnt_fsowner;
if (nuid == KAUTH_UID_NONE) {
nuid = 99;
}
} else if (VATTR_IS_SUPPORTED(vap, va_uid)) {
nuid = vap->va_uid;
} else {
/* this will always be something sensible */
nuid = mp->mnt_fsowner;
}
if ((nuid == 99) && !is_suser) {
nuid = kauth_cred_getuid(vfs_context_ucred(ctx));
}
VATTR_RETURN(vap, va_uid, nuid);
}
if (VATTR_IS_ACTIVE(vap, va_gid)) {
if (is_suser && VATTR_IS_SUPPORTED(vap, va_gid)) {
ngid = vap->va_gid;
} else if (mp->mnt_flag & MNT_IGNORE_OWNERSHIP) {
ngid = mp->mnt_fsgroup;
if (ngid == KAUTH_GID_NONE) {
ngid = 99;
}
} else if (VATTR_IS_SUPPORTED(vap, va_gid)) {
ngid = vap->va_gid;
} else {
/* this will always be something sensible */
ngid = mp->mnt_fsgroup;
}
if ((ngid == 99) && !is_suser) {
ngid = kauth_cred_getgid(vfs_context_ucred(ctx));
}
VATTR_RETURN(vap, va_gid, ngid);
}
}
/*
* Returns: 0 Success
* ENOMEM Not enough space [only if has filesec]
* EINVAL Requested unknown attributes
* VNOP_GETATTR: ???
* vnode_get_filesec: ???
* kauth_cred_guid2uid: ???
* kauth_cred_guid2gid: ???
* vfs_update_vfsstat: ???
*/
int
vnode_getattr(vnode_t vp, struct vnode_attr *vap, vfs_context_t ctx)
{
kauth_filesec_t fsec;
kauth_acl_t facl;
int error;
/*
* Reject attempts to fetch unknown attributes.
*/
if (vap->va_active & ~VNODE_ATTR_ALL) {
return EINVAL;
}
/* don't ask for extended security data if the filesystem doesn't support it */
if (!vfs_extendedsecurity(vnode_mount(vp))) {
VATTR_CLEAR_ACTIVE(vap, va_acl);
VATTR_CLEAR_ACTIVE(vap, va_uuuid);
VATTR_CLEAR_ACTIVE(vap, va_guuid);
}
/*
* If the caller wants size values we might have to synthesise, give the
* filesystem the opportunity to supply better intermediate results.
*/
if (VATTR_IS_ACTIVE(vap, va_data_alloc) ||
VATTR_IS_ACTIVE(vap, va_total_size) ||
VATTR_IS_ACTIVE(vap, va_total_alloc)) {
VATTR_SET_ACTIVE(vap, va_data_size);
VATTR_SET_ACTIVE(vap, va_data_alloc);
VATTR_SET_ACTIVE(vap, va_total_size);
VATTR_SET_ACTIVE(vap, va_total_alloc);
}
vap->va_vaflags &= ~VA_USEFSID;
error = VNOP_GETATTR(vp, vap, ctx);
if (error) {
KAUTH_DEBUG("ERROR - returning %d", error);
goto out;
}
/*
* If extended security data was requested but not returned, try the fallback
* path.
*/
if (VATTR_NOT_RETURNED(vap, va_acl) || VATTR_NOT_RETURNED(vap, va_uuuid) || VATTR_NOT_RETURNED(vap, va_guuid)) {
fsec = NULL;
if (XATTR_VNODE_SUPPORTED(vp)) {
/* try to get the filesec */
if ((error = vnode_get_filesec(vp, &fsec, ctx)) != 0) {
goto out;
}
}
/* if no filesec, no attributes */
if (fsec == NULL) {
VATTR_RETURN(vap, va_acl, NULL);
VATTR_RETURN(vap, va_uuuid, kauth_null_guid);
VATTR_RETURN(vap, va_guuid, kauth_null_guid);
} else {
/* looks good, try to return what we were asked for */
VATTR_RETURN(vap, va_uuuid, fsec->fsec_owner);
VATTR_RETURN(vap, va_guuid, fsec->fsec_group);
/* only return the ACL if we were actually asked for it */
if (VATTR_IS_ACTIVE(vap, va_acl)) {
if (fsec->fsec_acl.acl_entrycount == KAUTH_FILESEC_NOACL) {
VATTR_RETURN(vap, va_acl, NULL);
} else {
facl = kauth_acl_alloc(fsec->fsec_acl.acl_entrycount);
if (facl == NULL) {
kauth_filesec_free(fsec);
error = ENOMEM;
goto out;
}
__nochk_bcopy(&fsec->fsec_acl, facl, KAUTH_ACL_COPYSIZE(&fsec->fsec_acl));
VATTR_RETURN(vap, va_acl, facl);
}
}
kauth_filesec_free(fsec);
}
}
/*
* If someone gave us an unsolicited filesec, toss it. We promise that
* we're OK with a filesystem giving us anything back, but our callers
* only expect what they asked for.
*/
if (VATTR_IS_SUPPORTED(vap, va_acl) && !VATTR_IS_ACTIVE(vap, va_acl)) {
if (vap->va_acl != NULL) {
kauth_acl_free(vap->va_acl);
}
VATTR_CLEAR_SUPPORTED(vap, va_acl);
}
#if 0 /* enable when we have a filesystem only supporting UUIDs */
/*
* Handle the case where we need a UID/GID, but only have extended
* security information.
*/
if (VATTR_NOT_RETURNED(vap, va_uid) &&
VATTR_IS_SUPPORTED(vap, va_uuuid) &&
!kauth_guid_equal(&vap->va_uuuid, &kauth_null_guid)) {
if ((error = kauth_cred_guid2uid(&vap->va_uuuid, &nuid)) == 0) {
VATTR_RETURN(vap, va_uid, nuid);
}
}
if (VATTR_NOT_RETURNED(vap, va_gid) &&
VATTR_IS_SUPPORTED(vap, va_guuid) &&
!kauth_guid_equal(&vap->va_guuid, &kauth_null_guid)) {
if ((error = kauth_cred_guid2gid(&vap->va_guuid, &ngid)) == 0) {
VATTR_RETURN(vap, va_gid, ngid);
}
}
#endif
vnode_attr_handle_uid_and_gid(vap, vp->v_mount, ctx);
/*
* Synthesise some values that can be reasonably guessed.
*/
if (!VATTR_IS_SUPPORTED(vap, va_iosize)) {
assert(vp->v_mount->mnt_vfsstat.f_iosize <= UINT32_MAX);
VATTR_RETURN(vap, va_iosize, (uint32_t)vp->v_mount->mnt_vfsstat.f_iosize);
}
if (!VATTR_IS_SUPPORTED(vap, va_flags)) {
VATTR_RETURN(vap, va_flags, 0);
}
if (!VATTR_IS_SUPPORTED(vap, va_filerev)) {
VATTR_RETURN(vap, va_filerev, 0);
}
if (!VATTR_IS_SUPPORTED(vap, va_gen)) {
VATTR_RETURN(vap, va_gen, 0);
}
/*
* Default sizes. Ordering here is important, as later defaults build on earlier ones.
*/
if (!VATTR_IS_SUPPORTED(vap, va_data_size)) {
VATTR_RETURN(vap, va_data_size, 0);
}
/* do we want any of the possibly-computed values? */
if (VATTR_IS_ACTIVE(vap, va_data_alloc) ||
VATTR_IS_ACTIVE(vap, va_total_size) ||
VATTR_IS_ACTIVE(vap, va_total_alloc)) {
/* make sure f_bsize is valid */
if (vp->v_mount->mnt_vfsstat.f_bsize == 0) {
if ((error = vfs_update_vfsstat(vp->v_mount, ctx, VFS_KERNEL_EVENT)) != 0) {
goto out;
}
}
/* default va_data_alloc from va_data_size */
if (!VATTR_IS_SUPPORTED(vap, va_data_alloc)) {
VATTR_RETURN(vap, va_data_alloc, roundup(vap->va_data_size, vp->v_mount->mnt_vfsstat.f_bsize));
}
/* default va_total_size from va_data_size */
if (!VATTR_IS_SUPPORTED(vap, va_total_size)) {
VATTR_RETURN(vap, va_total_size, vap->va_data_size);
}
/* default va_total_alloc from va_total_size which is guaranteed at this point */
if (!VATTR_IS_SUPPORTED(vap, va_total_alloc)) {
VATTR_RETURN(vap, va_total_alloc, roundup(vap->va_total_size, vp->v_mount->mnt_vfsstat.f_bsize));
}
}
/*
* If we don't have a change time, pull it from the modtime.
*/
if (!VATTR_IS_SUPPORTED(vap, va_change_time) && VATTR_IS_SUPPORTED(vap, va_modify_time)) {
VATTR_RETURN(vap, va_change_time, vap->va_modify_time);
}
/*
* This is really only supported for the creation VNOPs, but since the field is there
* we should populate it correctly.
*/
VATTR_RETURN(vap, va_type, vp->v_type);
/*
* The fsid can be obtained from the mountpoint directly.
*/
if (VATTR_IS_ACTIVE(vap, va_fsid) &&
(!VATTR_IS_SUPPORTED(vap, va_fsid) ||
vap->va_vaflags & VA_REALFSID || !(vap->va_vaflags & VA_USEFSID))) {
VATTR_RETURN(vap, va_fsid, vp->v_mount->mnt_vfsstat.f_fsid.val[0]);
}
out:
vap->va_vaflags &= ~VA_USEFSID;
return error;
}
/*
* Choose 32 bit or 64 bit fsid
*/
uint64_t
vnode_get_va_fsid(struct vnode_attr *vap)
{
if (VATTR_IS_SUPPORTED(vap, va_fsid64)) {
return (uint64_t)vap->va_fsid64.val[0] + ((uint64_t)vap->va_fsid64.val[1] << 32);
}
return vap->va_fsid;
}
/*
* Set the attributes on a vnode in a vnode context.
*
* Parameters: vp The vnode whose attributes to set.
* vap A pointer to the attributes to set.
* ctx The vnode context in which the
* operation is to be attempted.
*
* Returns: 0 Success
* !0 errno value
*
* Notes: The kauth_filesec_t in 'vap', if any, is in host byte order.
*
* The contents of the data area pointed to by 'vap' may be
* modified if the vnode is on a filesystem which has been
* mounted with ingore ownership flags, or by the underlyng
* VFS itself, or by the fallback code, if the underlying VFS
* does not support ACL, UUID, or GUUID attributes directly.
*
* XXX: We should enummerate the possible errno values here, and where
* in the code they originated.
*/
int
vnode_setattr(vnode_t vp, struct vnode_attr *vap, vfs_context_t ctx)
{
int error;
#if CONFIG_FSE
uint64_t active;
int is_perm_change = 0;
int is_stat_change = 0;
#endif
/*
* Reject attempts to set unknown attributes.
*/
if (vap->va_active & ~VNODE_ATTR_ALL) {
return EINVAL;
}
/*
* Make sure the filesystem is mounted R/W.
* If not, return an error.
*/
if (vfs_isrdonly(vp->v_mount)) {
error = EROFS;
goto out;
}
#if DEVELOPMENT || DEBUG
/*
* XXX VSWAP: Check for entitlements or special flag here
* so we can restrict access appropriately.
*/
#else /* DEVELOPMENT || DEBUG */
if (vnode_isswap(vp) && (ctx != vfs_context_kernel())) {
error = EPERM;
goto out;
}
#endif /* DEVELOPMENT || DEBUG */
#if NAMEDSTREAMS
/* For streams, va_data_size is the only setable attribute. */
if ((vp->v_flag & VISNAMEDSTREAM) && (vap->va_active != VNODE_ATTR_va_data_size)) {
error = EPERM;
goto out;
}
#endif
/* Check for truncation */
if (VATTR_IS_ACTIVE(vap, va_data_size)) {
switch (vp->v_type) {
case VREG:
/* For regular files it's ok */
break;
case VDIR:
/* Not allowed to truncate directories */
error = EISDIR;
goto out;
default:
/* For everything else we will clear the bit and let underlying FS decide on the rest */
VATTR_CLEAR_ACTIVE(vap, va_data_size);
if (vap->va_active) {
break;
}
/* If it was the only bit set, return success, to handle cases like redirect to /dev/null */
return 0;
}
}
/*
* If ownership is being ignored on this volume, we silently discard
* ownership changes.
*/
if (vp->v_mount->mnt_flag & MNT_IGNORE_OWNERSHIP) {
VATTR_CLEAR_ACTIVE(vap, va_uid);
VATTR_CLEAR_ACTIVE(vap, va_gid);
}
/*
* Make sure that extended security is enabled if we're going to try
* to set any.
*/
if (!vfs_extendedsecurity(vnode_mount(vp)) &&
(VATTR_IS_ACTIVE(vap, va_acl) || VATTR_IS_ACTIVE(vap, va_uuuid) || VATTR_IS_ACTIVE(vap, va_guuid))) {
KAUTH_DEBUG("SETATTR - returning ENOTSUP to request to set extended security");
error = ENOTSUP;
goto out;
}
/* Never allow the setting of any unsupported superuser flags. */
if (VATTR_IS_ACTIVE(vap, va_flags)) {
vap->va_flags &= (SF_SUPPORTED | UF_SETTABLE);
}
#if CONFIG_FSE
/*
* Remember all of the active attributes that we're
* attempting to modify.
*/
active = vap->va_active & ~VNODE_ATTR_RDONLY;
#endif
error = VNOP_SETATTR(vp, vap, ctx);
if ((error == 0) && !VATTR_ALL_SUPPORTED(vap)) {
error = vnode_setattr_fallback(vp, vap, ctx);
}
#if CONFIG_FSE
#define PERMISSION_BITS (VNODE_ATTR_BIT(va_uid) | VNODE_ATTR_BIT(va_uuuid) | \
VNODE_ATTR_BIT(va_gid) | VNODE_ATTR_BIT(va_guuid) | \
VNODE_ATTR_BIT(va_mode) | VNODE_ATTR_BIT(va_acl))
/*
* Now that we've changed them, decide whether to send an
* FSevent.
*/
if ((active & PERMISSION_BITS) & vap->va_supported) {
is_perm_change = 1;
} else {
/*
* We've already checked the permission bits, and we
* also want to filter out access time / backup time
* changes.
*/
active &= ~(PERMISSION_BITS |
VNODE_ATTR_BIT(va_access_time) |
VNODE_ATTR_BIT(va_backup_time));
/* Anything left to notify about? */
if (active & vap->va_supported) {
is_stat_change = 1;
}
}
if (error == 0) {
if (is_perm_change) {
if (need_fsevent(FSE_CHOWN, vp)) {
add_fsevent(FSE_CHOWN, ctx, FSE_ARG_VNODE, vp, FSE_ARG_DONE);
}
} else if (is_stat_change && need_fsevent(FSE_STAT_CHANGED, vp)) {
add_fsevent(FSE_STAT_CHANGED, ctx, FSE_ARG_VNODE, vp, FSE_ARG_DONE);
}
}
#undef PERMISSION_BITS
#endif
out:
return error;
}
/*
* Fallback for setting the attributes on a vnode in a vnode context. This
* Function will attempt to store ACL, UUID, and GUID information utilizing
* a read/modify/write operation against an EA used as a backing store for
* the object.
*
* Parameters: vp The vnode whose attributes to set.
* vap A pointer to the attributes to set.
* ctx The vnode context in which the
* operation is to be attempted.
*
* Returns: 0 Success
* !0 errno value
*
* Notes: The kauth_filesec_t in 'vap', if any, is in host byte order,
* as are the fsec and lfsec, if they are used.
*
* The contents of the data area pointed to by 'vap' may be
* modified to indicate that the attribute is supported for
* any given requested attribute.
*
* XXX: We should enummerate the possible errno values here, and where
* in the code they originated.
*/
int
vnode_setattr_fallback(vnode_t vp, struct vnode_attr *vap, vfs_context_t ctx)
{
kauth_filesec_t fsec;
kauth_acl_t facl;
struct kauth_filesec lfsec;
int error;
error = 0;
/*
* Extended security fallback via extended attributes.
*
* Note that we do not free the filesec; the caller is expected to
* do this.
*/
if (VATTR_NOT_RETURNED(vap, va_acl) ||
VATTR_NOT_RETURNED(vap, va_uuuid) ||
VATTR_NOT_RETURNED(vap, va_guuid)) {
VFS_DEBUG(ctx, vp, "SETATTR - doing filesec fallback");
/*
* Fail for file types that we don't permit extended security
* to be set on.
*/
if (!XATTR_VNODE_SUPPORTED(vp)) {
VFS_DEBUG(ctx, vp, "SETATTR - Can't write ACL to file type %d", vnode_vtype(vp));
error = EINVAL;
goto out;
}
/*
* If we don't have all the extended security items, we need
* to fetch the existing data to perform a read-modify-write
* operation.
*/
fsec = NULL;
if (!VATTR_IS_ACTIVE(vap, va_acl) ||
!VATTR_IS_ACTIVE(vap, va_uuuid) ||
!VATTR_IS_ACTIVE(vap, va_guuid)) {
if ((error = vnode_get_filesec(vp, &fsec, ctx)) != 0) {
KAUTH_DEBUG("SETATTR - ERROR %d fetching filesec for update", error);
goto out;
}
}
/* if we didn't get a filesec, use our local one */
if (fsec == NULL) {
KAUTH_DEBUG("SETATTR - using local filesec for new/full update");
fsec = &lfsec;
} else {
KAUTH_DEBUG("SETATTR - updating existing filesec");
}
/* find the ACL */
facl = &fsec->fsec_acl;
/* if we're using the local filesec, we need to initialise it */
if (fsec == &lfsec) {
fsec->fsec_magic = KAUTH_FILESEC_MAGIC;
fsec->fsec_owner = kauth_null_guid;
fsec->fsec_group = kauth_null_guid;
facl->acl_entrycount = KAUTH_FILESEC_NOACL;
facl->acl_flags = 0;
}
/*
* Update with the supplied attributes.
*/
if (VATTR_IS_ACTIVE(vap, va_uuuid)) {
KAUTH_DEBUG("SETATTR - updating owner UUID");
fsec->fsec_owner = vap->va_uuuid;
VATTR_SET_SUPPORTED(vap, va_uuuid);
}
if (VATTR_IS_ACTIVE(vap, va_guuid)) {
KAUTH_DEBUG("SETATTR - updating group UUID");
fsec->fsec_group = vap->va_guuid;
VATTR_SET_SUPPORTED(vap, va_guuid);
}
if (VATTR_IS_ACTIVE(vap, va_acl)) {
if (vap->va_acl == NULL) {
KAUTH_DEBUG("SETATTR - removing ACL");
facl->acl_entrycount = KAUTH_FILESEC_NOACL;
} else {
KAUTH_DEBUG("SETATTR - setting ACL with %d entries", vap->va_acl->acl_entrycount);
facl = vap->va_acl;
}
VATTR_SET_SUPPORTED(vap, va_acl);
}
/*
* If the filesec data is all invalid, we can just remove
* the EA completely.
*/
if ((facl->acl_entrycount == KAUTH_FILESEC_NOACL) &&
kauth_guid_equal(&fsec->fsec_owner, &kauth_null_guid) &&
kauth_guid_equal(&fsec->fsec_group, &kauth_null_guid)) {
error = vn_removexattr(vp, KAUTH_FILESEC_XATTR, XATTR_NOSECURITY, ctx);
/* no attribute is ok, nothing to delete */
if (error == ENOATTR) {
error = 0;
}
VFS_DEBUG(ctx, vp, "SETATTR - remove filesec returning %d", error);
} else {
/* write the EA */
error = vnode_set_filesec(vp, fsec, facl, ctx);
VFS_DEBUG(ctx, vp, "SETATTR - update filesec returning %d", error);
}
/* if we fetched a filesec, dispose of the buffer */
if (fsec != &lfsec) {
kauth_filesec_free(fsec);
}
}
out:
return error;
}
/*
* Upcall for a filesystem to tell VFS about an EVFILT_VNODE-type
* event on a vnode.
*/
int
vnode_notify(vnode_t vp, uint32_t events, struct vnode_attr *vap)
{
/* These are the same as the corresponding knotes, at least for now. Cheating a little. */
uint32_t knote_mask = (VNODE_EVENT_WRITE | VNODE_EVENT_DELETE | VNODE_EVENT_RENAME
| VNODE_EVENT_LINK | VNODE_EVENT_EXTEND | VNODE_EVENT_ATTRIB);
uint32_t dir_contents_mask = (VNODE_EVENT_DIR_CREATED | VNODE_EVENT_FILE_CREATED
| VNODE_EVENT_DIR_REMOVED | VNODE_EVENT_FILE_REMOVED);
uint32_t knote_events = (events & knote_mask);
/* Permissions are not explicitly part of the kqueue model */
if (events & VNODE_EVENT_PERMS) {
knote_events |= NOTE_ATTRIB;
}
/* Directory contents information just becomes NOTE_WRITE */
if ((vnode_isdir(vp)) && (events & dir_contents_mask)) {
knote_events |= NOTE_WRITE;
}
if (knote_events) {
lock_vnode_and_post(vp, knote_events);
#if CONFIG_FSE
if (vap != NULL) {
create_fsevent_from_kevent(vp, events, vap);
}
#else
(void)vap;
#endif
}
return 0;
}
int
vnode_isdyldsharedcache(vnode_t vp)
{
return (vp->v_flag & VSHARED_DYLD) ? 1 : 0;
}
/*
* For a filesystem that isn't tracking its own vnode watchers:
* check whether a vnode is being monitored.
*/
int
vnode_ismonitored(vnode_t vp)
{
return vp->v_knotes.slh_first != NULL;
}
int
vnode_getbackingvnode(vnode_t in_vp, vnode_t* out_vpp)
{
if (out_vpp) {
*out_vpp = NULLVP;
}
#if NULLFS
return nullfs_getbackingvnode(in_vp, out_vpp);
#else
#pragma unused(in_vp)
return ENOENT;
#endif
}
/*
* Initialize a struct vnode_attr and activate the attributes required
* by the vnode_notify() call.
*/
int
vfs_get_notify_attributes(struct vnode_attr *vap)
{
VATTR_INIT(vap);
vap->va_active = VNODE_NOTIFY_ATTRS;
return 0;
}
#if CONFIG_TRIGGERS
int
vfs_settriggercallback(fsid_t *fsid, vfs_trigger_callback_t vtc, void *data, uint32_t flags __unused, vfs_context_t ctx)
{
int error;
mount_t mp;
mp = mount_list_lookupby_fsid(fsid, 0 /* locked */, 1 /* withref */);
if (mp == NULL) {
return ENOENT;
}
error = vfs_busy(mp, LK_NOWAIT);
mount_iterdrop(mp);
if (error != 0) {
return ENOENT;
}
mount_lock(mp);
if (mp->mnt_triggercallback != NULL) {
error = EBUSY;
mount_unlock(mp);
goto out;
}
mp->mnt_triggercallback = vtc;
mp->mnt_triggerdata = data;
mount_unlock(mp);
mp->mnt_triggercallback(mp, VTC_REPLACE, data, ctx);
out:
vfs_unbusy(mp);
return 0;
}
#endif /* CONFIG_TRIGGERS */
/*
* Definition of vnode operations.
*/
#if 0
/*
*#
*#% lookup dvp L ? ?
*#% lookup vpp - L -
*/
struct vnop_lookup_args {
struct vnodeop_desc *a_desc;
vnode_t a_dvp;
vnode_t *a_vpp;
struct componentname *a_cnp;
vfs_context_t a_context;
};
#endif /* 0*/
/*
* Returns: 0 Success
* lock_fsnode:ENOENT No such file or directory [only for VFS
* that is not thread safe & vnode is
* currently being/has been terminated]
* <vfs_lookup>:ENAMETOOLONG
* <vfs_lookup>:ENOENT
* <vfs_lookup>:EJUSTRETURN
* <vfs_lookup>:EPERM
* <vfs_lookup>:EISDIR
* <vfs_lookup>:ENOTDIR
* <vfs_lookup>:???
*
* Note: The return codes from the underlying VFS's lookup routine can't
* be fully enumerated here, since third party VFS authors may not
* limit their error returns to the ones documented here, even
* though this may result in some programs functioning incorrectly.
*
* The return codes documented above are those which may currently
* be returned by HFS from hfs_lookup, not including additional
* error code which may be propagated from underlying routines.
*/
errno_t
VNOP_LOOKUP(vnode_t dvp, vnode_t *vpp, struct componentname *cnp, vfs_context_t ctx)
{
int _err;
struct vnop_lookup_args a;
a.a_desc = &vnop_lookup_desc;
a.a_dvp = dvp;
a.a_vpp = vpp;
a.a_cnp = cnp;
a.a_context = ctx;
_err = (*dvp->v_op[vnop_lookup_desc.vdesc_offset])(&a);
if (_err == 0 && *vpp) {
DTRACE_FSINFO(lookup, vnode_t, *vpp);
}
return _err;
}
#if 0
struct vnop_compound_open_args {
struct vnodeop_desc *a_desc;
vnode_t a_dvp;
vnode_t *a_vpp;
struct componentname *a_cnp;
int32_t a_flags;
int32_t a_fmode;
struct vnode_attr *a_vap;
vfs_context_t a_context;
void *a_reserved;
};
#endif /* 0 */
int
VNOP_COMPOUND_OPEN(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, int32_t flags, int32_t fmode, uint32_t *statusp, struct vnode_attr *vap, vfs_context_t ctx)
{
int _err;
struct vnop_compound_open_args a;
int did_create = 0;
int want_create;
uint32_t tmp_status = 0;
struct componentname *cnp = &ndp->ni_cnd;
want_create = (flags & O_CREAT);
a.a_desc = &vnop_compound_open_desc;
a.a_dvp = dvp;
a.a_vpp = vpp; /* Could be NULL */
a.a_cnp = cnp;
a.a_flags = flags;
a.a_fmode = fmode;
a.a_status = (statusp != NULL) ? statusp : &tmp_status;
a.a_vap = vap;
a.a_context = ctx;
a.a_open_create_authorizer = vn_authorize_create;
a.a_open_existing_authorizer = vn_authorize_open_existing;
a.a_reserved = NULL;
if (dvp == NULLVP) {
panic("No dvp?");
}
if (want_create && !vap) {
panic("Want create, but no vap?");
}
if (!want_create && vap) {
panic("Don't want create, but have a vap?");
}
_err = (*dvp->v_op[vnop_compound_open_desc.vdesc_offset])(&a);
if (want_create) {
if (_err == 0 && *vpp) {
DTRACE_FSINFO(compound_open, vnode_t, *vpp);
} else {
DTRACE_FSINFO(compound_open, vnode_t, dvp);
}
} else {
DTRACE_FSINFO(compound_open, vnode_t, *vpp);
}
did_create = (*a.a_status & COMPOUND_OPEN_STATUS_DID_CREATE);
if (did_create && !want_create) {
panic("Filesystem did a create, even though none was requested?");
}
if (did_create) {
#if CONFIG_APPLEDOUBLE
if (!NATIVE_XATTR(dvp)) {
/*
* Remove stale Apple Double file (if any).
*/
xattrfile_remove(dvp, cnp->cn_nameptr, ctx, 0);
}
#endif /* CONFIG_APPLEDOUBLE */
/* On create, provide kqueue notification */
post_event_if_success(dvp, _err, NOTE_WRITE);
}
lookup_compound_vnop_post_hook(_err, dvp, *vpp, ndp, did_create);
#if 0 /* FSEvents... */
if (*vpp && _err && _err != EKEEPLOOKING) {
vnode_put(*vpp);
*vpp = NULLVP;
}
#endif /* 0 */
return _err;
}
#if 0
struct vnop_create_args {
struct vnodeop_desc *a_desc;
vnode_t a_dvp;
vnode_t *a_vpp;
struct componentname *a_cnp;
struct vnode_attr *a_vap;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_CREATE(vnode_t dvp, vnode_t * vpp, struct componentname * cnp, struct vnode_attr * vap, vfs_context_t ctx)
{
int _err;
struct vnop_create_args a;
a.a_desc = &vnop_create_desc;
a.a_dvp = dvp;
a.a_vpp = vpp;
a.a_cnp = cnp;
a.a_vap = vap;
a.a_context = ctx;
_err = (*dvp->v_op[vnop_create_desc.vdesc_offset])(&a);
if (_err == 0 && *vpp) {
DTRACE_FSINFO(create, vnode_t, *vpp);
}
#if CONFIG_APPLEDOUBLE
if (_err == 0 && !NATIVE_XATTR(dvp)) {
/*
* Remove stale Apple Double file (if any).
*/
xattrfile_remove(dvp, cnp->cn_nameptr, ctx, 0);
}
#endif /* CONFIG_APPLEDOUBLE */
post_event_if_success(dvp, _err, NOTE_WRITE);
return _err;
}
#if 0
/*
*#
*#% whiteout dvp L L L
*#% whiteout cnp - - -
*#% whiteout flag - - -
*#
*/
struct vnop_whiteout_args {
struct vnodeop_desc *a_desc;
vnode_t a_dvp;
struct componentname *a_cnp;
int a_flags;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_WHITEOUT(__unused vnode_t dvp, __unused struct componentname *cnp,
__unused int flags, __unused vfs_context_t ctx)
{
return ENOTSUP; // XXX OBSOLETE
}
#if 0
/*
*#
*#% mknod dvp L U U
*#% mknod vpp - X -
*#
*/
struct vnop_mknod_args {
struct vnodeop_desc *a_desc;
vnode_t a_dvp;
vnode_t *a_vpp;
struct componentname *a_cnp;
struct vnode_attr *a_vap;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_MKNOD(vnode_t dvp, vnode_t * vpp, struct componentname * cnp, struct vnode_attr * vap, vfs_context_t ctx)
{
int _err;
struct vnop_mknod_args a;
a.a_desc = &vnop_mknod_desc;
a.a_dvp = dvp;
a.a_vpp = vpp;
a.a_cnp = cnp;
a.a_vap = vap;
a.a_context = ctx;
_err = (*dvp->v_op[vnop_mknod_desc.vdesc_offset])(&a);
if (_err == 0 && *vpp) {
DTRACE_FSINFO(mknod, vnode_t, *vpp);
}
post_event_if_success(dvp, _err, NOTE_WRITE);
return _err;
}
#if 0
/*
*#
*#% open vp L L L
*#
*/
struct vnop_open_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
int a_mode;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_OPEN(vnode_t vp, int mode, vfs_context_t ctx)
{
int _err;
struct vnop_open_args a;
if (ctx == NULL) {
ctx = vfs_context_current();
}
a.a_desc = &vnop_open_desc;
a.a_vp = vp;
a.a_mode = mode;
a.a_context = ctx;
_err = (*vp->v_op[vnop_open_desc.vdesc_offset])(&a);
DTRACE_FSINFO(open, vnode_t, vp);
return _err;
}
#if 0
/*
*#
*#% close vp U U U
*#
*/
struct vnop_close_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
int a_fflag;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_CLOSE(vnode_t vp, int fflag, vfs_context_t ctx)
{
int _err;
struct vnop_close_args a;
if (ctx == NULL) {
ctx = vfs_context_current();
}
a.a_desc = &vnop_close_desc;
a.a_vp = vp;
a.a_fflag = fflag;
a.a_context = ctx;
_err = (*vp->v_op[vnop_close_desc.vdesc_offset])(&a);
DTRACE_FSINFO(close, vnode_t, vp);
return _err;
}
#if 0
/*
*#
*#% access vp L L L
*#
*/
struct vnop_access_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
int a_action;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_ACCESS(vnode_t vp, int action, vfs_context_t ctx)
{
int _err;
struct vnop_access_args a;
if (ctx == NULL) {
ctx = vfs_context_current();
}
a.a_desc = &vnop_access_desc;
a.a_vp = vp;
a.a_action = action;
a.a_context = ctx;
_err = (*vp->v_op[vnop_access_desc.vdesc_offset])(&a);
DTRACE_FSINFO(access, vnode_t, vp);
return _err;
}
#if 0
/*
*#
*#% getattr vp = = =
*#
*/
struct vnop_getattr_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
struct vnode_attr *a_vap;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_GETATTR(vnode_t vp, struct vnode_attr * vap, vfs_context_t ctx)
{
int _err;
struct vnop_getattr_args a;
a.a_desc = &vnop_getattr_desc;
a.a_vp = vp;
a.a_vap = vap;
a.a_context = ctx;
_err = (*vp->v_op[vnop_getattr_desc.vdesc_offset])(&a);
DTRACE_FSINFO(getattr, vnode_t, vp);
return _err;
}
#if 0
/*
*#
*#% setattr vp L L L
*#
*/
struct vnop_setattr_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
struct vnode_attr *a_vap;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_SETATTR(vnode_t vp, struct vnode_attr * vap, vfs_context_t ctx)
{
int _err;
struct vnop_setattr_args a;
a.a_desc = &vnop_setattr_desc;
a.a_vp = vp;
a.a_vap = vap;
a.a_context = ctx;
_err = (*vp->v_op[vnop_setattr_desc.vdesc_offset])(&a);
DTRACE_FSINFO(setattr, vnode_t, vp);
#if CONFIG_APPLEDOUBLE
/*
* Shadow uid/gid/mod change to extended attribute file.
*/
if (_err == 0 && !NATIVE_XATTR(vp)) {
struct vnode_attr va;
int change = 0;
VATTR_INIT(&va);
if (VATTR_IS_ACTIVE(vap, va_uid)) {
VATTR_SET(&va, va_uid, vap->va_uid);
change = 1;
}
if (VATTR_IS_ACTIVE(vap, va_gid)) {
VATTR_SET(&va, va_gid, vap->va_gid);
change = 1;
}
if (VATTR_IS_ACTIVE(vap, va_mode)) {
VATTR_SET(&va, va_mode, vap->va_mode);
change = 1;
}
if (change) {
vnode_t dvp;
const char *vname;
dvp = vnode_getparent(vp);
vname = vnode_getname(vp);
xattrfile_setattr(dvp, vname, &va, ctx);
if (dvp != NULLVP) {
vnode_put(dvp);
}
if (vname != NULL) {
vnode_putname(vname);
}
}
}
#endif /* CONFIG_APPLEDOUBLE */
/*
* If we have changed any of the things about the file that are likely
* to result in changes to authorization results, blow the vnode auth
* cache
*/
if (_err == 0 && (
VATTR_IS_SUPPORTED(vap, va_mode) ||
VATTR_IS_SUPPORTED(vap, va_uid) ||
VATTR_IS_SUPPORTED(vap, va_gid) ||
VATTR_IS_SUPPORTED(vap, va_flags) ||
VATTR_IS_SUPPORTED(vap, va_acl) ||
VATTR_IS_SUPPORTED(vap, va_uuuid) ||
VATTR_IS_SUPPORTED(vap, va_guuid))) {
vnode_uncache_authorized_action(vp, KAUTH_INVALIDATE_CACHED_RIGHTS);
#if NAMEDSTREAMS
if (vfs_authopaque(vp->v_mount) && vnode_hasnamedstreams(vp)) {
vnode_t svp;
if (vnode_getnamedstream(vp, &svp, XATTR_RESOURCEFORK_NAME, NS_OPEN, 0, ctx) == 0) {
vnode_uncache_authorized_action(svp, KAUTH_INVALIDATE_CACHED_RIGHTS);
vnode_put(svp);
}
}
#endif /* NAMEDSTREAMS */
}
post_event_if_success(vp, _err, NOTE_ATTRIB);
return _err;
}
#if 0
/*
*#
*#% read vp L L L
*#
*/
struct vnop_read_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
struct uio *a_uio;
int a_ioflag;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_READ(vnode_t vp, struct uio * uio, int ioflag, vfs_context_t ctx)
{
int _err;
struct vnop_read_args a;
#if CONFIG_DTRACE
user_ssize_t resid = uio_resid(uio);
#endif
if (ctx == NULL) {
return EINVAL;
}
a.a_desc = &vnop_read_desc;
a.a_vp = vp;
a.a_uio = uio;
a.a_ioflag = ioflag;
a.a_context = ctx;
_err = (*vp->v_op[vnop_read_desc.vdesc_offset])(&a);
DTRACE_FSINFO_IO(read,
vnode_t, vp, user_ssize_t, (resid - uio_resid(uio)));
return _err;
}
#if 0
/*
*#
*#% write vp L L L
*#
*/
struct vnop_write_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
struct uio *a_uio;
int a_ioflag;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_WRITE(vnode_t vp, struct uio * uio, int ioflag, vfs_context_t ctx)
{
struct vnop_write_args a;
int _err;
#if CONFIG_DTRACE
user_ssize_t resid = uio_resid(uio);
#endif
if (ctx == NULL) {
return EINVAL;
}
a.a_desc = &vnop_write_desc;
a.a_vp = vp;
a.a_uio = uio;
a.a_ioflag = ioflag;
a.a_context = ctx;
_err = (*vp->v_op[vnop_write_desc.vdesc_offset])(&a);
DTRACE_FSINFO_IO(write,
vnode_t, vp, user_ssize_t, (resid - uio_resid(uio)));
post_event_if_success(vp, _err, NOTE_WRITE);
return _err;
}
#if 0
/*
*#
*#% ioctl vp U U U
*#
*/
struct vnop_ioctl_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
u_long a_command;
caddr_t a_data;
int a_fflag;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_IOCTL(vnode_t vp, u_long command, caddr_t data, int fflag, vfs_context_t ctx)
{
int _err;
struct vnop_ioctl_args a;
if (ctx == NULL) {
ctx = vfs_context_current();
}
/*
* This check should probably have been put in the TTY code instead...
*
* We have to be careful about what we assume during startup and shutdown.
* We have to be able to use the root filesystem's device vnode even when
* devfs isn't mounted (yet/anymore), so we can't go looking at its mount
* structure. If there is no data pointer, it doesn't matter whether
* the device is 64-bit ready. Any command (like DKIOCSYNCHRONIZE)
* which passes NULL for its data pointer can therefore be used during
* mount or unmount of the root filesystem.
*
* Depending on what root filesystems need to do during mount/unmount, we
* may need to loosen this check again in the future.
*/
if (vfs_context_is64bit(ctx) && !(vnode_ischr(vp) || vnode_isblk(vp))) {
if (data != NULL && !vnode_vfs64bitready(vp)) {
return ENOTTY;
}
}
if ((command == DKIOCISSOLIDSTATE) && (vp == rootvp) && rootvp_is_ssd && data) {
*data = 1;
return 0;
}
a.a_desc = &vnop_ioctl_desc;
a.a_vp = vp;
a.a_command = command;
a.a_data = data;
a.a_fflag = fflag;
a.a_context = ctx;
_err = (*vp->v_op[vnop_ioctl_desc.vdesc_offset])(&a);
DTRACE_FSINFO(ioctl, vnode_t, vp);
return _err;
}
#if 0
/*
*#
*#% select vp U U U
*#
*/
struct vnop_select_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
int a_which;
int a_fflags;
void *a_wql;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_SELECT(vnode_t vp, int which, int fflags, void * wql, vfs_context_t ctx)
{
int _err;
struct vnop_select_args a;
if (ctx == NULL) {
ctx = vfs_context_current();
}
a.a_desc = &vnop_select_desc;
a.a_vp = vp;
a.a_which = which;
a.a_fflags = fflags;
a.a_context = ctx;
a.a_wql = wql;
_err = (*vp->v_op[vnop_select_desc.vdesc_offset])(&a);
DTRACE_FSINFO(select, vnode_t, vp);
return _err;
}
#if 0
/*
*#
*#% exchange fvp L L L
*#% exchange tvp L L L
*#
*/
struct vnop_exchange_args {
struct vnodeop_desc *a_desc;
vnode_t a_fvp;
vnode_t a_tvp;
int a_options;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_EXCHANGE(vnode_t fvp, vnode_t tvp, int options, vfs_context_t ctx)
{
int _err;
struct vnop_exchange_args a;
a.a_desc = &vnop_exchange_desc;
a.a_fvp = fvp;
a.a_tvp = tvp;
a.a_options = options;
a.a_context = ctx;
_err = (*fvp->v_op[vnop_exchange_desc.vdesc_offset])(&a);
DTRACE_FSINFO(exchange, vnode_t, fvp);
/* Don't post NOTE_WRITE because file descriptors follow the data ... */
post_event_if_success(fvp, _err, NOTE_ATTRIB);
post_event_if_success(tvp, _err, NOTE_ATTRIB);
return _err;
}
#if 0
/*
*#
*#% revoke vp U U U
*#
*/
struct vnop_revoke_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
int a_flags;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_REVOKE(vnode_t vp, int flags, vfs_context_t ctx)
{
struct vnop_revoke_args a;
int _err;
a.a_desc = &vnop_revoke_desc;
a.a_vp = vp;
a.a_flags = flags;
a.a_context = ctx;
_err = (*vp->v_op[vnop_revoke_desc.vdesc_offset])(&a);
DTRACE_FSINFO(revoke, vnode_t, vp);
return _err;
}
#if 0
/*
*#
*# mmap_check - vp U U U
*#
*/
struct vnop_mmap_check_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
int a_flags;
vfs_context_t a_context;
};
#endif /* 0 */
errno_t
VNOP_MMAP_CHECK(vnode_t vp, int flags, vfs_context_t ctx)
{
int _err;
struct vnop_mmap_check_args a;
a.a_desc = &vnop_mmap_check_desc;
a.a_vp = vp;
a.a_flags = flags;
a.a_context = ctx;
_err = (*vp->v_op[vnop_mmap_check_desc.vdesc_offset])(&a);
if (_err == ENOTSUP) {
_err = 0;
}
DTRACE_FSINFO(mmap_check, vnode_t, vp);
return _err;
}
#if 0
/*
*#
*# mmap - vp U U U
*#
*/
struct vnop_mmap_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
int a_fflags;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_MMAP(vnode_t vp, int fflags, vfs_context_t ctx)
{
int _err;
struct vnop_mmap_args a;
a.a_desc = &vnop_mmap_desc;
a.a_vp = vp;
a.a_fflags = fflags;
a.a_context = ctx;
_err = (*vp->v_op[vnop_mmap_desc.vdesc_offset])(&a);
DTRACE_FSINFO(mmap, vnode_t, vp);
return _err;
}
#if 0
/*
*#
*# mnomap - vp U U U
*#
*/
struct vnop_mnomap_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_MNOMAP(vnode_t vp, vfs_context_t ctx)
{
int _err;
struct vnop_mnomap_args a;
a.a_desc = &vnop_mnomap_desc;
a.a_vp = vp;
a.a_context = ctx;
_err = (*vp->v_op[vnop_mnomap_desc.vdesc_offset])(&a);
DTRACE_FSINFO(mnomap, vnode_t, vp);
return _err;
}
#if 0
/*
*#
*#% fsync vp L L L
*#
*/
struct vnop_fsync_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
int a_waitfor;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_FSYNC(vnode_t vp, int waitfor, vfs_context_t ctx)
{
struct vnop_fsync_args a;
int _err;
a.a_desc = &vnop_fsync_desc;
a.a_vp = vp;
a.a_waitfor = waitfor;
a.a_context = ctx;
_err = (*vp->v_op[vnop_fsync_desc.vdesc_offset])(&a);
DTRACE_FSINFO(fsync, vnode_t, vp);
return _err;
}
#if 0
/*
*#
*#% remove dvp L U U
*#% remove vp L U U
*#
*/
struct vnop_remove_args {
struct vnodeop_desc *a_desc;
vnode_t a_dvp;
vnode_t a_vp;
struct componentname *a_cnp;
int a_flags;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_REMOVE(vnode_t dvp, vnode_t vp, struct componentname * cnp, int flags, vfs_context_t ctx)
{
int _err;
struct vnop_remove_args a;
a.a_desc = &vnop_remove_desc;
a.a_dvp = dvp;
a.a_vp = vp;
a.a_cnp = cnp;
a.a_flags = flags;
a.a_context = ctx;
_err = (*dvp->v_op[vnop_remove_desc.vdesc_offset])(&a);
DTRACE_FSINFO(remove, vnode_t, vp);
if (_err == 0) {
vnode_setneedinactive(vp);
#if CONFIG_APPLEDOUBLE
if (!(NATIVE_XATTR(dvp))) {
/*
* Remove any associated extended attribute file (._ AppleDouble file).
*/
xattrfile_remove(dvp, cnp->cn_nameptr, ctx, 1);
}
#endif /* CONFIG_APPLEDOUBLE */
}
post_event_if_success(vp, _err, NOTE_DELETE | NOTE_LINK);
post_event_if_success(dvp, _err, NOTE_WRITE);
return _err;
}
int
VNOP_COMPOUND_REMOVE(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, int32_t flags, struct vnode_attr *vap, vfs_context_t ctx)
{
int _err;
struct vnop_compound_remove_args a;
int no_vp = (*vpp == NULLVP);
a.a_desc = &vnop_compound_remove_desc;
a.a_dvp = dvp;
a.a_vpp = vpp;
a.a_cnp = &ndp->ni_cnd;
a.a_flags = flags;
a.a_vap = vap;
a.a_context = ctx;
a.a_remove_authorizer = vn_authorize_unlink;
_err = (*dvp->v_op[vnop_compound_remove_desc.vdesc_offset])(&a);
if (_err == 0 && *vpp) {
DTRACE_FSINFO(compound_remove, vnode_t, *vpp);
} else {
DTRACE_FSINFO(compound_remove, vnode_t, dvp);
}
if (_err == 0) {
vnode_setneedinactive(*vpp);
#if CONFIG_APPLEDOUBLE
if (!(NATIVE_XATTR(dvp))) {
/*
* Remove any associated extended attribute file (._ AppleDouble file).
*/
xattrfile_remove(dvp, ndp->ni_cnd.cn_nameptr, ctx, 1);
}
#endif /* CONFIG_APPLEDOUBLE */
}
post_event_if_success(*vpp, _err, NOTE_DELETE | NOTE_LINK);
post_event_if_success(dvp, _err, NOTE_WRITE);
if (no_vp) {
lookup_compound_vnop_post_hook(_err, dvp, *vpp, ndp, 0);
if (*vpp && _err && _err != EKEEPLOOKING) {
vnode_put(*vpp);
*vpp = NULLVP;
}
}
//printf("VNOP_COMPOUND_REMOVE() returning %d\n", _err);
return _err;
}
#if 0
/*
*#
*#% link vp U U U
*#% link tdvp L U U
*#
*/
struct vnop_link_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
vnode_t a_tdvp;
struct componentname *a_cnp;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_LINK(vnode_t vp, vnode_t tdvp, struct componentname * cnp, vfs_context_t ctx)
{
int _err;
struct vnop_link_args a;
#if CONFIG_APPLEDOUBLE
/*
* For file systems with non-native extended attributes,
* disallow linking to an existing "._" Apple Double file.
*/
if (!NATIVE_XATTR(tdvp) && (vp->v_type == VREG)) {
const char *vname;
vname = vnode_getname(vp);
if (vname != NULL) {
_err = 0;
if (vname[0] == '.' && vname[1] == '_' && vname[2] != '\0') {
_err = EPERM;
}
vnode_putname(vname);
if (_err) {
return _err;
}
}
}
#endif /* CONFIG_APPLEDOUBLE */
a.a_desc = &vnop_link_desc;
a.a_vp = vp;
a.a_tdvp = tdvp;
a.a_cnp = cnp;
a.a_context = ctx;
_err = (*tdvp->v_op[vnop_link_desc.vdesc_offset])(&a);
DTRACE_FSINFO(link, vnode_t, vp);
post_event_if_success(vp, _err, NOTE_LINK);
post_event_if_success(tdvp, _err, NOTE_WRITE);
return _err;
}
errno_t
vn_rename(struct vnode *fdvp, struct vnode **fvpp, struct componentname *fcnp, struct vnode_attr *fvap,
struct vnode *tdvp, struct vnode **tvpp, struct componentname *tcnp, struct vnode_attr *tvap,
vfs_rename_flags_t flags, vfs_context_t ctx)
{
int _err;
struct nameidata *fromnd = NULL;
struct nameidata *tond = NULL;
#if CONFIG_APPLEDOUBLE
vnode_t src_attr_vp = NULLVP;
vnode_t dst_attr_vp = NULLVP;
char smallname1[48];
char smallname2[48];
char *xfromname = NULL;
char *xtoname = NULL;
#endif /* CONFIG_APPLEDOUBLE */
int batched;
uint32_t tdfflags; // Target directory file flags
batched = vnode_compound_rename_available(fdvp);
if (!batched) {
if (*fvpp == NULLVP) {
panic("Not batched, and no fvp?");
}
}
#if CONFIG_APPLEDOUBLE
/*
* We need to preflight any potential AppleDouble file for the source file
* before doing the rename operation, since we could potentially be doing
* this operation on a network filesystem, and would end up duplicating
* the work. Also, save the source and destination names. Skip it if the
* source has a "._" prefix.
*/
size_t xfromname_len = 0;
size_t xtoname_len = 0;
if (!NATIVE_XATTR(fdvp) &&
!(fcnp->cn_nameptr[0] == '.' && fcnp->cn_nameptr[1] == '_')) {
int error;
/* Get source attribute file name. */
xfromname_len = fcnp->cn_namelen + 3;
if (xfromname_len > sizeof(smallname1)) {
xfromname = kalloc_data(xfromname_len, Z_WAITOK);
} else {
xfromname = &smallname1[0];
}
strlcpy(xfromname, "._", xfromname_len);
strlcat(xfromname, fcnp->cn_nameptr, xfromname_len);
/* Get destination attribute file name. */
xtoname_len = tcnp->cn_namelen + 3;
if (xtoname_len > sizeof(smallname2)) {
xtoname = kalloc_data(xtoname_len, Z_WAITOK);
} else {
xtoname = &smallname2[0];
}
strlcpy(xtoname, "._", xtoname_len);
strlcat(xtoname, tcnp->cn_nameptr, xtoname_len);
/*
* Look up source attribute file, keep reference on it if exists.
* Note that we do the namei with the nameiop of RENAME, which is different than
* in the rename syscall. It's OK if the source file does not exist, since this
* is only for AppleDouble files.
*/
fromnd = kalloc_type(struct nameidata, Z_WAITOK);
NDINIT(fromnd, RENAME, OP_RENAME, NOFOLLOW | USEDVP | CN_NBMOUNTLOOK,
UIO_SYSSPACE, CAST_USER_ADDR_T(xfromname), ctx);
fromnd->ni_dvp = fdvp;
error = namei(fromnd);
/*
* If there was an error looking up source attribute file,
* we'll behave as if it didn't exist.
*/
if (error == 0) {
if (fromnd->ni_vp) {
/* src_attr_vp indicates need to call vnode_put / nameidone later */
src_attr_vp = fromnd->ni_vp;
if (fromnd->ni_vp->v_type != VREG) {
src_attr_vp = NULLVP;
vnode_put(fromnd->ni_vp);
}
}
/*
* Either we got an invalid vnode type (not a regular file) or the namei lookup
* suppressed ENOENT as a valid error since we're renaming. Either way, we don't
* have a vnode here, so we drop our namei buffer for the source attribute file
*/
if (src_attr_vp == NULLVP) {
nameidone(fromnd);
}
}
}
#endif /* CONFIG_APPLEDOUBLE */
if (batched) {
_err = VNOP_COMPOUND_RENAME(fdvp, fvpp, fcnp, fvap, tdvp, tvpp, tcnp, tvap, flags, ctx);
if (_err != 0) {
printf("VNOP_COMPOUND_RENAME() returned %d\n", _err);
}
} else {
if (flags) {
_err = VNOP_RENAMEX(fdvp, *fvpp, fcnp, tdvp, *tvpp, tcnp, flags, ctx);
if (_err == ENOTSUP && flags == VFS_RENAME_SECLUDE) {
// Legacy...
if ((*fvpp)->v_mount->mnt_vtable->vfc_vfsflags & VFC_VFSVNOP_SECLUDE_RENAME) {
fcnp->cn_flags |= CN_SECLUDE_RENAME;
_err = VNOP_RENAME(fdvp, *fvpp, fcnp, tdvp, *tvpp, tcnp, ctx);
}
}
} else {
_err = VNOP_RENAME(fdvp, *fvpp, fcnp, tdvp, *tvpp, tcnp, ctx);
}
}
/*
* If moved to a new directory that is restricted,
* set the restricted flag on the item moved.
*/
if (_err == 0) {
_err = vnode_flags(tdvp, &tdfflags, ctx);
if (_err == 0) {
uint32_t inherit_flags = tdfflags & (UF_DATAVAULT | SF_RESTRICTED);
if (inherit_flags) {
uint32_t fflags;
_err = vnode_flags(*fvpp, &fflags, ctx);
if (_err == 0 && fflags != (fflags | inherit_flags)) {
struct vnode_attr va;
VATTR_INIT(&va);
VATTR_SET(&va, va_flags, fflags | inherit_flags);
_err = vnode_setattr(*fvpp, &va, ctx);
}
}
}
}
#if CONFIG_MACF
if (_err == 0) {
mac_vnode_notify_rename(
ctx, /* ctx */
*fvpp, /* fvp */
fdvp, /* fdvp */
fcnp, /* fcnp */
*tvpp, /* tvp */
tdvp, /* tdvp */
tcnp, /* tcnp */
(flags & VFS_RENAME_SWAP) /* swap */
);
}
#endif
#if CONFIG_APPLEDOUBLE
/*
* Rename any associated extended attribute file (._ AppleDouble file).
*/
if (_err == 0 && !NATIVE_XATTR(fdvp) && xfromname != NULL) {
int error = 0;
/*
* Get destination attribute file vnode.
* Note that tdvp already has an iocount reference. Make sure to check that we
* get a valid vnode from namei.
*/
tond = kalloc_type(struct nameidata, Z_WAITOK);
NDINIT(tond, RENAME, OP_RENAME,
NOCACHE | NOFOLLOW | USEDVP | CN_NBMOUNTLOOK, UIO_SYSSPACE,
CAST_USER_ADDR_T(xtoname), ctx);
tond->ni_dvp = tdvp;
error = namei(tond);
if (error) {
goto ad_error;
}
if (tond->ni_vp) {
dst_attr_vp = tond->ni_vp;
}
if (src_attr_vp) {
const char *old_name = src_attr_vp->v_name;
vnode_t old_parent = src_attr_vp->v_parent;
if (batched) {
error = VNOP_COMPOUND_RENAME(fdvp, &src_attr_vp, &fromnd->ni_cnd, NULL,
tdvp, &dst_attr_vp, &tond->ni_cnd, NULL,
0, ctx);
} else {
error = VNOP_RENAME(fdvp, src_attr_vp, &fromnd->ni_cnd,
tdvp, dst_attr_vp, &tond->ni_cnd, ctx);
}
if (error == 0 && old_name == src_attr_vp->v_name &&
old_parent == src_attr_vp->v_parent) {
int update_flags = VNODE_UPDATE_NAME;
if (fdvp != tdvp) {
update_flags |= VNODE_UPDATE_PARENT;
}
if ((src_attr_vp->v_mount->mnt_vtable->vfc_vfsflags & VFC_VFSVNOP_NOUPDATEID_RENAME) == 0) {
vnode_update_identity(src_attr_vp, tdvp,
tond->ni_cnd.cn_nameptr,
tond->ni_cnd.cn_namelen,
tond->ni_cnd.cn_hash,
update_flags);
}
}
/* kevent notifications for moving resource files
* _err is zero if we're here, so no need to notify directories, code
* below will do that. only need to post the rename on the source and
* possibly a delete on the dest
*/
post_event_if_success(src_attr_vp, error, NOTE_RENAME);
if (dst_attr_vp) {
post_event_if_success(dst_attr_vp, error, NOTE_DELETE);
}
} else if (dst_attr_vp) {
/*
* Just delete destination attribute file vnode if it exists, since
* we didn't have a source attribute file.
* Note that tdvp already has an iocount reference.
*/
struct vnop_remove_args args;
args.a_desc = &vnop_remove_desc;
args.a_dvp = tdvp;
args.a_vp = dst_attr_vp;
args.a_cnp = &tond->ni_cnd;
args.a_context = ctx;
if (error == 0) {
error = (*tdvp->v_op[vnop_remove_desc.vdesc_offset])(&args);
if (error == 0) {
vnode_setneedinactive(dst_attr_vp);
}
}
/* kevent notification for deleting the destination's attribute file
* if it existed. Only need to post the delete on the destination, since
* the code below will handle the directories.
*/
post_event_if_success(dst_attr_vp, error, NOTE_DELETE);
}
}
ad_error:
if (src_attr_vp) {
vnode_put(src_attr_vp);
nameidone(fromnd);
}
if (dst_attr_vp) {
vnode_put(dst_attr_vp);
nameidone(tond);
}
if (xfromname && xfromname != &smallname1[0]) {
kfree_data(xfromname, xfromname_len);
}
if (xtoname && xtoname != &smallname2[0]) {
kfree_data(xtoname, xtoname_len);
}
#endif /* CONFIG_APPLEDOUBLE */
kfree_type(struct nameidata, fromnd);
kfree_type(struct nameidata, tond);
return _err;
}
#if 0
/*
*#
*#% rename fdvp U U U
*#% rename fvp U U U
*#% rename tdvp L U U
*#% rename tvp X U U
*#
*/
struct vnop_rename_args {
struct vnodeop_desc *a_desc;
vnode_t a_fdvp;
vnode_t a_fvp;
struct componentname *a_fcnp;
vnode_t a_tdvp;
vnode_t a_tvp;
struct componentname *a_tcnp;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_RENAME(struct vnode *fdvp, struct vnode *fvp, struct componentname *fcnp,
struct vnode *tdvp, struct vnode *tvp, struct componentname *tcnp,
vfs_context_t ctx)
{
int _err = 0;
struct vnop_rename_args a;
a.a_desc = &vnop_rename_desc;
a.a_fdvp = fdvp;
a.a_fvp = fvp;
a.a_fcnp = fcnp;
a.a_tdvp = tdvp;
a.a_tvp = tvp;
a.a_tcnp = tcnp;
a.a_context = ctx;
/* do the rename of the main file. */
_err = (*fdvp->v_op[vnop_rename_desc.vdesc_offset])(&a);
DTRACE_FSINFO(rename, vnode_t, fdvp);
if (_err) {
return _err;
}
return post_rename(fdvp, fvp, tdvp, tvp);
}
static errno_t
post_rename(vnode_t fdvp, vnode_t fvp, vnode_t tdvp, vnode_t tvp)
{
if (tvp && tvp != fvp) {
vnode_setneedinactive(tvp);
}
/* Wrote at least one directory. If transplanted a dir, also changed link counts */
int events = NOTE_WRITE;
if (vnode_isdir(fvp)) {
/* Link count on dir changed only if we are moving a dir and...
* --Moved to new dir, not overwriting there
* --Kept in same dir and DID overwrite
*/
if (((fdvp != tdvp) && (!tvp)) || ((fdvp == tdvp) && (tvp))) {
events |= NOTE_LINK;
}
}
lock_vnode_and_post(fdvp, events);
if (fdvp != tdvp) {
lock_vnode_and_post(tdvp, events);
}
/* If you're replacing the target, post a deletion for it */
if (tvp) {
lock_vnode_and_post(tvp, NOTE_DELETE);
}
lock_vnode_and_post(fvp, NOTE_RENAME);
return 0;
}
#if 0
/*
*#
*#% renamex fdvp U U U
*#% renamex fvp U U U
*#% renamex tdvp L U U
*#% renamex tvp X U U
*#
*/
struct vnop_renamex_args {
struct vnodeop_desc *a_desc;
vnode_t a_fdvp;
vnode_t a_fvp;
struct componentname *a_fcnp;
vnode_t a_tdvp;
vnode_t a_tvp;
struct componentname *a_tcnp;
vfs_rename_flags_t a_flags;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_RENAMEX(struct vnode *fdvp, struct vnode *fvp, struct componentname *fcnp,
struct vnode *tdvp, struct vnode *tvp, struct componentname *tcnp,
vfs_rename_flags_t flags, vfs_context_t ctx)
{
int _err = 0;
struct vnop_renamex_args a;
a.a_desc = &vnop_renamex_desc;
a.a_fdvp = fdvp;
a.a_fvp = fvp;
a.a_fcnp = fcnp;
a.a_tdvp = tdvp;
a.a_tvp = tvp;
a.a_tcnp = tcnp;
a.a_flags = flags;
a.a_context = ctx;
/* do the rename of the main file. */
_err = (*fdvp->v_op[vnop_renamex_desc.vdesc_offset])(&a);
DTRACE_FSINFO(renamex, vnode_t, fdvp);
if (_err) {
return _err;
}
return post_rename(fdvp, fvp, tdvp, tvp);
}
int
VNOP_COMPOUND_RENAME(
struct vnode *fdvp, struct vnode **fvpp, struct componentname *fcnp, struct vnode_attr *fvap,
struct vnode *tdvp, struct vnode **tvpp, struct componentname *tcnp, struct vnode_attr *tvap,
uint32_t flags, vfs_context_t ctx)
{
int _err = 0;
int events;
struct vnop_compound_rename_args a;
int no_fvp, no_tvp;
no_fvp = (*fvpp) == NULLVP;
no_tvp = (*tvpp) == NULLVP;
a.a_desc = &vnop_compound_rename_desc;
a.a_fdvp = fdvp;
a.a_fvpp = fvpp;
a.a_fcnp = fcnp;
a.a_fvap = fvap;
a.a_tdvp = tdvp;
a.a_tvpp = tvpp;
a.a_tcnp = tcnp;
a.a_tvap = tvap;
a.a_flags = flags;
a.a_context = ctx;
a.a_rename_authorizer = vn_authorize_rename;
a.a_reserved = NULL;
/* do the rename of the main file. */
_err = (*fdvp->v_op[vnop_compound_rename_desc.vdesc_offset])(&a);
DTRACE_FSINFO(compound_rename, vnode_t, fdvp);
if (_err == 0) {
if (*tvpp && *tvpp != *fvpp) {
vnode_setneedinactive(*tvpp);
}
}
/* Wrote at least one directory. If transplanted a dir, also changed link counts */
if (_err == 0 && *fvpp != *tvpp) {
if (!*fvpp) {
panic("No fvpp after compound rename?");
}
events = NOTE_WRITE;
if (vnode_isdir(*fvpp)) {
/* Link count on dir changed only if we are moving a dir and...
* --Moved to new dir, not overwriting there
* --Kept in same dir and DID overwrite
*/
if (((fdvp != tdvp) && (!*tvpp)) || ((fdvp == tdvp) && (*tvpp))) {
events |= NOTE_LINK;
}
}
lock_vnode_and_post(fdvp, events);
if (fdvp != tdvp) {
lock_vnode_and_post(tdvp, events);
}
/* If you're replacing the target, post a deletion for it */
if (*tvpp) {
lock_vnode_and_post(*tvpp, NOTE_DELETE);
}
lock_vnode_and_post(*fvpp, NOTE_RENAME);
}
if (no_fvp) {
lookup_compound_vnop_post_hook(_err, fdvp, *fvpp, fcnp->cn_ndp, 0);
}
if (no_tvp && *tvpp != NULLVP) {
lookup_compound_vnop_post_hook(_err, tdvp, *tvpp, tcnp->cn_ndp, 0);
}
if (_err && _err != EKEEPLOOKING) {
if (*fvpp) {
vnode_put(*fvpp);
*fvpp = NULLVP;
}
if (*tvpp) {
vnode_put(*tvpp);
*tvpp = NULLVP;
}
}
return _err;
}
int
vn_mkdir(struct vnode *dvp, struct vnode **vpp, struct nameidata *ndp,
struct vnode_attr *vap, vfs_context_t ctx)
{
if (ndp->ni_cnd.cn_nameiop != CREATE) {
panic("Non-CREATE nameiop in vn_mkdir()?");
}
if (vnode_compound_mkdir_available(dvp)) {
return VNOP_COMPOUND_MKDIR(dvp, vpp, ndp, vap, ctx);
} else {
return VNOP_MKDIR(dvp, vpp, &ndp->ni_cnd, vap, ctx);
}
}
#if 0
/*
*#
*#% mkdir dvp L U U
*#% mkdir vpp - L -
*#
*/
struct vnop_mkdir_args {
struct vnodeop_desc *a_desc;
vnode_t a_dvp;
vnode_t *a_vpp;
struct componentname *a_cnp;
struct vnode_attr *a_vap;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_MKDIR(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
struct vnode_attr *vap, vfs_context_t ctx)
{
int _err;
struct vnop_mkdir_args a;
a.a_desc = &vnop_mkdir_desc;
a.a_dvp = dvp;
a.a_vpp = vpp;
a.a_cnp = cnp;
a.a_vap = vap;
a.a_context = ctx;
_err = (*dvp->v_op[vnop_mkdir_desc.vdesc_offset])(&a);
if (_err == 0 && *vpp) {
DTRACE_FSINFO(mkdir, vnode_t, *vpp);
}
#if CONFIG_APPLEDOUBLE
if (_err == 0 && !NATIVE_XATTR(dvp)) {
/*
* Remove stale Apple Double file (if any).
*/
xattrfile_remove(dvp, cnp->cn_nameptr, ctx, 0);
}
#endif /* CONFIG_APPLEDOUBLE */
post_event_if_success(dvp, _err, NOTE_LINK | NOTE_WRITE);
return _err;
}
int
VNOP_COMPOUND_MKDIR(struct vnode *dvp, struct vnode **vpp, struct nameidata *ndp,
struct vnode_attr *vap, vfs_context_t ctx)
{
int _err;
struct vnop_compound_mkdir_args a;
a.a_desc = &vnop_compound_mkdir_desc;
a.a_dvp = dvp;
a.a_vpp = vpp;
a.a_cnp = &ndp->ni_cnd;
a.a_vap = vap;
a.a_flags = 0;
a.a_context = ctx;
#if 0
a.a_mkdir_authorizer = vn_authorize_mkdir;
#endif /* 0 */
a.a_reserved = NULL;
_err = (*dvp->v_op[vnop_compound_mkdir_desc.vdesc_offset])(&a);
if (_err == 0 && *vpp) {
DTRACE_FSINFO(compound_mkdir, vnode_t, *vpp);
}
#if CONFIG_APPLEDOUBLE
if (_err == 0 && !NATIVE_XATTR(dvp)) {
/*
* Remove stale Apple Double file (if any).
*/
xattrfile_remove(dvp, ndp->ni_cnd.cn_nameptr, ctx, 0);
}
#endif /* CONFIG_APPLEDOUBLE */
post_event_if_success(dvp, _err, NOTE_LINK | NOTE_WRITE);
lookup_compound_vnop_post_hook(_err, dvp, *vpp, ndp, (_err == 0));
if (*vpp && _err && _err != EKEEPLOOKING) {
vnode_put(*vpp);
*vpp = NULLVP;
}
return _err;
}
int
vn_rmdir(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, struct vnode_attr *vap, vfs_context_t ctx)
{
if (vnode_compound_rmdir_available(dvp)) {
return VNOP_COMPOUND_RMDIR(dvp, vpp, ndp, vap, ctx);
} else {
if (*vpp == NULLVP) {
panic("NULL vp, but not a compound VNOP?");
}
if (vap != NULL) {
panic("Non-NULL vap, but not a compound VNOP?");
}
return VNOP_RMDIR(dvp, *vpp, &ndp->ni_cnd, ctx);
}
}
#if 0
/*
*#
*#% rmdir dvp L U U
*#% rmdir vp L U U
*#
*/
struct vnop_rmdir_args {
struct vnodeop_desc *a_desc;
vnode_t a_dvp;
vnode_t a_vp;
struct componentname *a_cnp;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_RMDIR(struct vnode *dvp, struct vnode *vp, struct componentname *cnp, vfs_context_t ctx)
{
int _err;
struct vnop_rmdir_args a;
a.a_desc = &vnop_rmdir_desc;
a.a_dvp = dvp;
a.a_vp = vp;
a.a_cnp = cnp;
a.a_context = ctx;
_err = (*vp->v_op[vnop_rmdir_desc.vdesc_offset])(&a);
DTRACE_FSINFO(rmdir, vnode_t, vp);
if (_err == 0) {
vnode_setneedinactive(vp);
#if CONFIG_APPLEDOUBLE
if (!(NATIVE_XATTR(dvp))) {
/*
* Remove any associated extended attribute file (._ AppleDouble file).
*/
xattrfile_remove(dvp, cnp->cn_nameptr, ctx, 1);
}
#endif
}
/* If you delete a dir, it loses its "." reference --> NOTE_LINK */
post_event_if_success(vp, _err, NOTE_DELETE | NOTE_LINK);
post_event_if_success(dvp, _err, NOTE_LINK | NOTE_WRITE);
return _err;
}
int
VNOP_COMPOUND_RMDIR(struct vnode *dvp, struct vnode **vpp, struct nameidata *ndp,
struct vnode_attr *vap, vfs_context_t ctx)
{
int _err;
struct vnop_compound_rmdir_args a;
int no_vp;
a.a_desc = &vnop_mkdir_desc;
a.a_dvp = dvp;
a.a_vpp = vpp;
a.a_cnp = &ndp->ni_cnd;
a.a_vap = vap;
a.a_flags = 0;
a.a_context = ctx;
a.a_rmdir_authorizer = vn_authorize_rmdir;
a.a_reserved = NULL;
no_vp = (*vpp == NULLVP);
_err = (*dvp->v_op[vnop_compound_rmdir_desc.vdesc_offset])(&a);
if (_err == 0 && *vpp) {
DTRACE_FSINFO(compound_rmdir, vnode_t, *vpp);
}
#if CONFIG_APPLEDOUBLE
if (_err == 0 && !NATIVE_XATTR(dvp)) {
/*
* Remove stale Apple Double file (if any).
*/
xattrfile_remove(dvp, ndp->ni_cnd.cn_nameptr, ctx, 0);
}
#endif
if (*vpp) {
post_event_if_success(*vpp, _err, NOTE_DELETE | NOTE_LINK);
}
post_event_if_success(dvp, _err, NOTE_LINK | NOTE_WRITE);
if (no_vp) {
lookup_compound_vnop_post_hook(_err, dvp, *vpp, ndp, 0);
#if 0 /* Removing orphaned ._ files requires a vp.... */
if (*vpp && _err && _err != EKEEPLOOKING) {
vnode_put(*vpp);
*vpp = NULLVP;
}
#endif /* 0 */
}
return _err;
}
#if CONFIG_APPLEDOUBLE
/*
* Remove a ._ AppleDouble file
*/
#define AD_STALE_SECS (180)
static void
xattrfile_remove(vnode_t dvp, const char * basename, vfs_context_t ctx, int force)
{
vnode_t xvp;
struct nameidata nd;
char smallname[64];
char *filename = NULL;
size_t alloc_len;
size_t copy_len;
if ((basename == NULL) || (basename[0] == '\0') ||
(basename[0] == '.' && basename[1] == '_')) {
return;
}
filename = &smallname[0];
alloc_len = snprintf(filename, sizeof(smallname), "._%s", basename);
if (alloc_len >= sizeof(smallname)) {
alloc_len++; /* snprintf result doesn't include '\0' */
filename = kalloc_data(alloc_len, Z_WAITOK);
copy_len = snprintf(filename, alloc_len, "._%s", basename);
}
NDINIT(&nd, DELETE, OP_UNLINK, WANTPARENT | LOCKLEAF | NOFOLLOW | USEDVP, UIO_SYSSPACE,
CAST_USER_ADDR_T(filename), ctx);
nd.ni_dvp = dvp;
if (namei(&nd) != 0) {
goto out2;
}
xvp = nd.ni_vp;
nameidone(&nd);
if (xvp->v_type != VREG) {
goto out1;
}
/*
* When creating a new object and a "._" file already
* exists, check to see if it's a stale "._" file. These are
* typically AppleDouble (AD) files generated via XNU's
* VFS compatibility shims for storing XATTRs and streams
* on filesystems that do not support them natively.
*/
if (!force) {
struct vnode_attr va;
VATTR_INIT(&va);
VATTR_WANTED(&va, va_data_size);
VATTR_WANTED(&va, va_modify_time);
VATTR_WANTED(&va, va_change_time);
if (VNOP_GETATTR(xvp, &va, ctx) == 0 &&
VATTR_IS_SUPPORTED(&va, va_data_size) &&
va.va_data_size != 0) {
struct timeval tv_compare = {};
struct timeval tv_now = {};
/*
* If the file exists (and has non-zero size), then use the newer of
* chgtime / modtime to compare against present time. Note that setting XATTRs or updating
* streams through the compatibility interfaces may not trigger chgtime to be updated, so
* checking either modtime or chgtime is useful.
*/
if (VATTR_IS_SUPPORTED(&va, va_modify_time) && (va.va_modify_time.tv_sec)) {
if (VATTR_IS_SUPPORTED(&va, va_change_time) && (va.va_change_time.tv_sec)) {
tv_compare.tv_sec = va.va_change_time.tv_sec;
if (tv_compare.tv_sec < va.va_modify_time.tv_sec) {
tv_compare.tv_sec = va.va_modify_time.tv_sec;
}
} else {
/* fall back to mod-time alone if chgtime not supported or set to 0 */
tv_compare.tv_sec = va.va_modify_time.tv_sec;
}
}
/* Now, we have a time to compare against, compare against AD_STALE_SEC */
microtime(&tv_now);
if ((tv_compare.tv_sec > 0) &&
(tv_now.tv_sec > tv_compare.tv_sec) &&
((tv_now.tv_sec - tv_compare.tv_sec) > AD_STALE_SECS)) {
force = 1; /* must be stale */
}
}
}
if (force) {
int error;
error = VNOP_REMOVE(dvp, xvp, &nd.ni_cnd, 0, ctx);
if (error == 0) {
vnode_setneedinactive(xvp);
}
post_event_if_success(xvp, error, NOTE_DELETE);
post_event_if_success(dvp, error, NOTE_WRITE);
}
out1:
vnode_put(dvp);
vnode_put(xvp);
out2:
if (filename && filename != &smallname[0]) {
kfree_data(filename, alloc_len);
}
}
/*
* Shadow uid/gid/mod to a ._ AppleDouble file
*/
static void
xattrfile_setattr(vnode_t dvp, const char * basename, struct vnode_attr * vap,
vfs_context_t ctx)
{
vnode_t xvp;
struct nameidata nd;
char smallname[64];
char *filename = NULL;
size_t alloc_len;
size_t copy_len;
if ((dvp == NULLVP) ||
(basename == NULL) || (basename[0] == '\0') ||
(basename[0] == '.' && basename[1] == '_')) {
return;
}
filename = &smallname[0];
alloc_len = snprintf(filename, sizeof(smallname), "._%s", basename);
if (alloc_len >= sizeof(smallname)) {
alloc_len++; /* snprintf result doesn't include '\0' */
filename = kalloc_data(alloc_len, Z_WAITOK);
copy_len = snprintf(filename, alloc_len, "._%s", basename);
}
NDINIT(&nd, LOOKUP, OP_SETATTR, NOFOLLOW | USEDVP, UIO_SYSSPACE,
CAST_USER_ADDR_T(filename), ctx);
nd.ni_dvp = dvp;
if (namei(&nd) != 0) {
goto out2;
}
xvp = nd.ni_vp;
nameidone(&nd);
if (xvp->v_type == VREG) {
struct vnop_setattr_args a;
a.a_desc = &vnop_setattr_desc;
a.a_vp = xvp;
a.a_vap = vap;
a.a_context = ctx;
(void) (*xvp->v_op[vnop_setattr_desc.vdesc_offset])(&a);
}
vnode_put(xvp);
out2:
if (filename && filename != &smallname[0]) {
kfree_data(filename, alloc_len);
}
}
#endif /* CONFIG_APPLEDOUBLE */
#if 0
/*
*#
*#% symlink dvp L U U
*#% symlink vpp - U -
*#
*/
struct vnop_symlink_args {
struct vnodeop_desc *a_desc;
vnode_t a_dvp;
vnode_t *a_vpp;
struct componentname *a_cnp;
struct vnode_attr *a_vap;
char *a_target;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_SYMLINK(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
struct vnode_attr *vap, char *target, vfs_context_t ctx)
{
int _err;
struct vnop_symlink_args a;
a.a_desc = &vnop_symlink_desc;
a.a_dvp = dvp;
a.a_vpp = vpp;
a.a_cnp = cnp;
a.a_vap = vap;
a.a_target = target;
a.a_context = ctx;
_err = (*dvp->v_op[vnop_symlink_desc.vdesc_offset])(&a);
DTRACE_FSINFO(symlink, vnode_t, dvp);
#if CONFIG_APPLEDOUBLE
if (_err == 0 && !NATIVE_XATTR(dvp)) {
/*
* Remove stale Apple Double file (if any). Posts its own knotes
*/
xattrfile_remove(dvp, cnp->cn_nameptr, ctx, 0);
}
#endif /* CONFIG_APPLEDOUBLE */
post_event_if_success(dvp, _err, NOTE_WRITE);
return _err;
}
#if 0
/*
*#
*#% readdir vp L L L
*#
*/
struct vnop_readdir_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
struct uio *a_uio;
int a_flags;
int *a_eofflag;
int *a_numdirent;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_READDIR(struct vnode *vp, struct uio *uio, int flags, int *eofflag,
int *numdirent, vfs_context_t ctx)
{
int _err;
struct vnop_readdir_args a;
#if CONFIG_DTRACE
user_ssize_t resid = uio_resid(uio);
#endif
a.a_desc = &vnop_readdir_desc;
a.a_vp = vp;
a.a_uio = uio;
a.a_flags = flags;
a.a_eofflag = eofflag;
a.a_numdirent = numdirent;
a.a_context = ctx;
_err = (*vp->v_op[vnop_readdir_desc.vdesc_offset])(&a);
DTRACE_FSINFO_IO(readdir,
vnode_t, vp, user_ssize_t, (resid - uio_resid(uio)));
return _err;
}
#if 0
/*
*#
*#% readdirattr vp L L L
*#
*/
struct vnop_readdirattr_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
struct attrlist *a_alist;
struct uio *a_uio;
uint32_t a_maxcount;
uint32_t a_options;
uint32_t *a_newstate;
int *a_eofflag;
uint32_t *a_actualcount;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_READDIRATTR(struct vnode *vp, struct attrlist *alist, struct uio *uio, uint32_t maxcount,
uint32_t options, uint32_t *newstate, int *eofflag, uint32_t *actualcount, vfs_context_t ctx)
{
int _err;
struct vnop_readdirattr_args a;
#if CONFIG_DTRACE
user_ssize_t resid = uio_resid(uio);
#endif
a.a_desc = &vnop_readdirattr_desc;
a.a_vp = vp;
a.a_alist = alist;
a.a_uio = uio;
a.a_maxcount = maxcount;
a.a_options = options;
a.a_newstate = newstate;
a.a_eofflag = eofflag;
a.a_actualcount = actualcount;
a.a_context = ctx;
_err = (*vp->v_op[vnop_readdirattr_desc.vdesc_offset])(&a);
DTRACE_FSINFO_IO(readdirattr,
vnode_t, vp, user_ssize_t, (resid - uio_resid(uio)));
return _err;
}
#if 0
struct vnop_getttrlistbulk_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
struct attrlist *a_alist;
struct vnode_attr *a_vap;
struct uio *a_uio;
void *a_private
uint64_t a_options;
int *a_eofflag;
uint32_t *a_actualcount;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_GETATTRLISTBULK(struct vnode *vp, struct attrlist *alist,
struct vnode_attr *vap, struct uio *uio, void *private, uint64_t options,
int32_t *eofflag, int32_t *actualcount, vfs_context_t ctx)
{
int _err;
struct vnop_getattrlistbulk_args a;
#if CONFIG_DTRACE
user_ssize_t resid = uio_resid(uio);
#endif
a.a_desc = &vnop_getattrlistbulk_desc;
a.a_vp = vp;
a.a_alist = alist;
a.a_vap = vap;
a.a_uio = uio;
a.a_private = private;
a.a_options = options;
a.a_eofflag = eofflag;
a.a_actualcount = actualcount;
a.a_context = ctx;
_err = (*vp->v_op[vnop_getattrlistbulk_desc.vdesc_offset])(&a);
DTRACE_FSINFO_IO(getattrlistbulk,
vnode_t, vp, user_ssize_t, (resid - uio_resid(uio)));
return _err;
}
#if 0
/*
*#
*#% readlink vp L L L
*#
*/
struct vnop_readlink_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
struct uio *a_uio;
vfs_context_t a_context;
};
#endif /* 0 */
/*
* Returns: 0 Success
* lock_fsnode:ENOENT No such file or directory [only for VFS
* that is not thread safe & vnode is
* currently being/has been terminated]
* <vfs_readlink>:EINVAL
* <vfs_readlink>:???
*
* Note: The return codes from the underlying VFS's readlink routine
* can't be fully enumerated here, since third party VFS authors
* may not limit their error returns to the ones documented here,
* even though this may result in some programs functioning
* incorrectly.
*
* The return codes documented above are those which may currently
* be returned by HFS from hfs_vnop_readlink, not including
* additional error code which may be propagated from underlying
* routines.
*/
errno_t
VNOP_READLINK(struct vnode *vp, struct uio *uio, vfs_context_t ctx)
{
int _err;
struct vnop_readlink_args a;
#if CONFIG_DTRACE
user_ssize_t resid = uio_resid(uio);
#endif
a.a_desc = &vnop_readlink_desc;
a.a_vp = vp;
a.a_uio = uio;
a.a_context = ctx;
_err = (*vp->v_op[vnop_readlink_desc.vdesc_offset])(&a);
DTRACE_FSINFO_IO(readlink,
vnode_t, vp, user_ssize_t, (resid - uio_resid(uio)));
return _err;
}
#if 0
/*
*#
*#% inactive vp L U U
*#
*/
struct vnop_inactive_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_INACTIVE(struct vnode *vp, vfs_context_t ctx)
{
int _err;
struct vnop_inactive_args a;
a.a_desc = &vnop_inactive_desc;
a.a_vp = vp;
a.a_context = ctx;
_err = (*vp->v_op[vnop_inactive_desc.vdesc_offset])(&a);
DTRACE_FSINFO(inactive, vnode_t, vp);
#if NAMEDSTREAMS
/* For file systems that do not support namedstream natively, mark
* the shadow stream file vnode to be recycled as soon as the last
* reference goes away. To avoid re-entering reclaim code, do not
* call recycle on terminating namedstream vnodes.
*/
if (vnode_isnamedstream(vp) &&
(vp->v_parent != NULLVP) &&
vnode_isshadow(vp) &&
((vp->v_lflag & VL_TERMINATE) == 0)) {
vnode_recycle(vp);
}
#endif
return _err;
}
#if 0
/*
*#
*#% reclaim vp U U U
*#
*/
struct vnop_reclaim_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_RECLAIM(struct vnode *vp, vfs_context_t ctx)
{
int _err;
struct vnop_reclaim_args a;
a.a_desc = &vnop_reclaim_desc;
a.a_vp = vp;
a.a_context = ctx;
_err = (*vp->v_op[vnop_reclaim_desc.vdesc_offset])(&a);
DTRACE_FSINFO(reclaim, vnode_t, vp);
return _err;
}
/*
* Returns: 0 Success
* lock_fsnode:ENOENT No such file or directory [only for VFS
* that is not thread safe & vnode is
* currently being/has been terminated]
* <vnop_pathconf_desc>:??? [per FS implementation specific]
*/
#if 0
/*
*#
*#% pathconf vp L L L
*#
*/
struct vnop_pathconf_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
int a_name;
int32_t *a_retval;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_PATHCONF(struct vnode *vp, int name, int32_t *retval, vfs_context_t ctx)
{
int _err;
struct vnop_pathconf_args a;
a.a_desc = &vnop_pathconf_desc;
a.a_vp = vp;
a.a_name = name;
a.a_retval = retval;
a.a_context = ctx;
_err = (*vp->v_op[vnop_pathconf_desc.vdesc_offset])(&a);
DTRACE_FSINFO(pathconf, vnode_t, vp);
return _err;
}
/*
* Returns: 0 Success
* err_advlock:ENOTSUP
* lf_advlock:???
* <vnop_advlock_desc>:???
*
* Notes: VFS implementations of advisory locking using calls through
* <vnop_advlock_desc> because lock enforcement does not occur
* locally should try to limit themselves to the return codes
* documented above for lf_advlock and err_advlock.
*/
#if 0
/*
*#
*#% advlock vp U U U
*#
*/
struct vnop_advlock_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
caddr_t a_id;
int a_op;
struct flock *a_fl;
int a_flags;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_ADVLOCK(struct vnode *vp, caddr_t id, int op, struct flock *fl, int flags, vfs_context_t ctx, struct timespec *timeout)
{
int _err;
struct vnop_advlock_args a;
a.a_desc = &vnop_advlock_desc;
a.a_vp = vp;
a.a_id = id;
a.a_op = op;
a.a_fl = fl;
a.a_flags = flags;
a.a_context = ctx;
a.a_timeout = timeout;
/* Disallow advisory locking on non-seekable vnodes */
if (vnode_isfifo(vp)) {
_err = err_advlock(&a);
} else {
if ((vp->v_flag & VLOCKLOCAL)) {
/* Advisory locking done at this layer */
_err = lf_advlock(&a);
} else if (flags & F_OFD_LOCK) {
/* Non-local locking doesn't work for OFD locks */
_err = err_advlock(&a);
} else if (op == F_TRANSFER) {
/* Non-local locking doesn't have F_TRANSFER */
_err = err_advlock(&a);
} else {
/* Advisory locking done by underlying filesystem */
_err = (*vp->v_op[vnop_advlock_desc.vdesc_offset])(&a);
}
DTRACE_FSINFO(advlock, vnode_t, vp);
if (op == F_UNLCK &&
(flags & (F_FLOCK | F_OFD_LOCK)) != 0) {
post_event_if_success(vp, _err, NOTE_FUNLOCK);
}
}
return _err;
}
#if 0
/*
*#
*#% allocate vp L L L
*#
*/
struct vnop_allocate_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
off_t a_length;
u_int32_t a_flags;
off_t *a_bytesallocated;
off_t a_offset;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_ALLOCATE(struct vnode *vp, off_t length, u_int32_t flags, off_t *bytesallocated, off_t offset, vfs_context_t ctx)
{
int _err;
struct vnop_allocate_args a;
a.a_desc = &vnop_allocate_desc;
a.a_vp = vp;
a.a_length = length;
a.a_flags = flags;
a.a_bytesallocated = bytesallocated;
a.a_offset = offset;
a.a_context = ctx;
_err = (*vp->v_op[vnop_allocate_desc.vdesc_offset])(&a);
DTRACE_FSINFO(allocate, vnode_t, vp);
#if CONFIG_FSE
if (_err == 0) {
add_fsevent(FSE_STAT_CHANGED, ctx, FSE_ARG_VNODE, vp, FSE_ARG_DONE);
}
#endif
return _err;
}
#if 0
/*
*#
*#% pagein vp = = =
*#
*/
struct vnop_pagein_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
upl_t a_pl;
upl_offset_t a_pl_offset;
off_t a_f_offset;
size_t a_size;
int a_flags;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_PAGEIN(struct vnode *vp, upl_t pl, upl_offset_t pl_offset, off_t f_offset, size_t size, int flags, vfs_context_t ctx)
{
int _err;
struct vnop_pagein_args a;
a.a_desc = &vnop_pagein_desc;
a.a_vp = vp;
a.a_pl = pl;
a.a_pl_offset = pl_offset;
a.a_f_offset = f_offset;
a.a_size = size;
a.a_flags = flags;
a.a_context = ctx;
_err = (*vp->v_op[vnop_pagein_desc.vdesc_offset])(&a);
DTRACE_FSINFO(pagein, vnode_t, vp);
return _err;
}
#if 0
/*
*#
*#% pageout vp = = =
*#
*/
struct vnop_pageout_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
upl_t a_pl;
upl_offset_t a_pl_offset;
off_t a_f_offset;
size_t a_size;
int a_flags;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_PAGEOUT(struct vnode *vp, upl_t pl, upl_offset_t pl_offset, off_t f_offset, size_t size, int flags, vfs_context_t ctx)
{
int _err;
struct vnop_pageout_args a;
a.a_desc = &vnop_pageout_desc;
a.a_vp = vp;
a.a_pl = pl;
a.a_pl_offset = pl_offset;
a.a_f_offset = f_offset;
a.a_size = size;
a.a_flags = flags;
a.a_context = ctx;
_err = (*vp->v_op[vnop_pageout_desc.vdesc_offset])(&a);
DTRACE_FSINFO(pageout, vnode_t, vp);
post_event_if_success(vp, _err, NOTE_WRITE);
return _err;
}
int
vn_remove(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, int32_t flags, struct vnode_attr *vap, vfs_context_t ctx)
{
if (vnode_compound_remove_available(dvp)) {
return VNOP_COMPOUND_REMOVE(dvp, vpp, ndp, flags, vap, ctx);
} else {
return VNOP_REMOVE(dvp, *vpp, &ndp->ni_cnd, flags, ctx);
}
}
#if CONFIG_SEARCHFS
#if 0
/*
*#
*#% searchfs vp L L L
*#
*/
struct vnop_searchfs_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
void *a_searchparams1;
void *a_searchparams2;
struct attrlist *a_searchattrs;
uint32_t a_maxmatches;
struct timeval *a_timelimit;
struct attrlist *a_returnattrs;
uint32_t *a_nummatches;
uint32_t a_scriptcode;
uint32_t a_options;
struct uio *a_uio;
struct searchstate *a_searchstate;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_SEARCHFS(struct vnode *vp, void *searchparams1, void *searchparams2, struct attrlist *searchattrs, uint32_t maxmatches, struct timeval *timelimit, struct attrlist *returnattrs, uint32_t *nummatches, uint32_t scriptcode, uint32_t options, struct uio *uio, struct searchstate *searchstate, vfs_context_t ctx)
{
int _err;
struct vnop_searchfs_args a;
a.a_desc = &vnop_searchfs_desc;
a.a_vp = vp;
a.a_searchparams1 = searchparams1;
a.a_searchparams2 = searchparams2;
a.a_searchattrs = searchattrs;
a.a_maxmatches = maxmatches;
a.a_timelimit = timelimit;
a.a_returnattrs = returnattrs;
a.a_nummatches = nummatches;
a.a_scriptcode = scriptcode;
a.a_options = options;
a.a_uio = uio;
a.a_searchstate = searchstate;
a.a_context = ctx;
_err = (*vp->v_op[vnop_searchfs_desc.vdesc_offset])(&a);
DTRACE_FSINFO(searchfs, vnode_t, vp);
return _err;
}
#endif /* CONFIG_SEARCHFS */
#if 0
/*
*#
*#% copyfile fvp U U U
*#% copyfile tdvp L U U
*#% copyfile tvp X U U
*#
*/
struct vnop_copyfile_args {
struct vnodeop_desc *a_desc;
vnode_t a_fvp;
vnode_t a_tdvp;
vnode_t a_tvp;
struct componentname *a_tcnp;
int a_mode;
int a_flags;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_COPYFILE(struct vnode *fvp, struct vnode *tdvp, struct vnode *tvp, struct componentname *tcnp,
int mode, int flags, vfs_context_t ctx)
{
int _err;
struct vnop_copyfile_args a;
a.a_desc = &vnop_copyfile_desc;
a.a_fvp = fvp;
a.a_tdvp = tdvp;
a.a_tvp = tvp;
a.a_tcnp = tcnp;
a.a_mode = mode;
a.a_flags = flags;
a.a_context = ctx;
_err = (*fvp->v_op[vnop_copyfile_desc.vdesc_offset])(&a);
DTRACE_FSINFO(copyfile, vnode_t, fvp);
return _err;
}
#if 0
struct vnop_clonefile_args {
struct vnodeop_desc *a_desc;
vnode_t a_fvp;
vnode_t a_dvp;
vnode_t *a_vpp;
struct componentname *a_cnp;
struct vnode_attr *a_vap;
uint32_t a_flags;
vfs_context_t a_context;
int (*a_dir_clone_authorizer)( /* Authorization callback */
struct vnode_attr *vap, /* attribute to be authorized */
kauth_action_t action, /* action for which attribute is to be authorized */
struct vnode_attr *dvap, /* target directory attributes */
vnode_t sdvp, /* source directory vnode pointer (optional) */
mount_t mp, /* mount point of filesystem */
dir_clone_authorizer_op_t vattr_op, /* specific operation requested : setup, authorization or cleanup */
uint32_t flags; /* value passed in a_flags to the VNOP */
vfs_context_t ctx, /* As passed to VNOP */
void *reserved); /* Always NULL */
void *a_reserved; /* Currently unused */
};
#endif /* 0 */
errno_t
VNOP_CLONEFILE(vnode_t fvp, vnode_t dvp, vnode_t *vpp,
struct componentname *cnp, struct vnode_attr *vap, uint32_t flags,
vfs_context_t ctx)
{
int _err;
struct vnop_clonefile_args a;
a.a_desc = &vnop_clonefile_desc;
a.a_fvp = fvp;
a.a_dvp = dvp;
a.a_vpp = vpp;
a.a_cnp = cnp;
a.a_vap = vap;
a.a_flags = flags;
a.a_context = ctx;
if (vnode_vtype(fvp) == VDIR) {
a.a_dir_clone_authorizer = vnode_attr_authorize_dir_clone;
} else {
a.a_dir_clone_authorizer = NULL;
}
_err = (*dvp->v_op[vnop_clonefile_desc.vdesc_offset])(&a);
if (_err == 0 && *vpp) {
DTRACE_FSINFO(clonefile, vnode_t, *vpp);
if (kdebug_enable) {
kdebug_lookup(*vpp, cnp);
}
}
post_event_if_success(dvp, _err, NOTE_WRITE);
return _err;
}
errno_t
VNOP_GETXATTR(vnode_t vp, const char *name, uio_t uio, size_t *size, int options, vfs_context_t ctx)
{
struct vnop_getxattr_args a;
int error;
a.a_desc = &vnop_getxattr_desc;
a.a_vp = vp;
a.a_name = name;
a.a_uio = uio;
a.a_size = size;
a.a_options = options;
a.a_context = ctx;
error = (*vp->v_op[vnop_getxattr_desc.vdesc_offset])(&a);
DTRACE_FSINFO(getxattr, vnode_t, vp);
return error;
}
errno_t
VNOP_SETXATTR(vnode_t vp, const char *name, uio_t uio, int options, vfs_context_t ctx)
{
struct vnop_setxattr_args a;
int error;
a.a_desc = &vnop_setxattr_desc;
a.a_vp = vp;
a.a_name = name;
a.a_uio = uio;
a.a_options = options;
a.a_context = ctx;
error = (*vp->v_op[vnop_setxattr_desc.vdesc_offset])(&a);
DTRACE_FSINFO(setxattr, vnode_t, vp);
if (error == 0) {
vnode_uncache_authorized_action(vp, KAUTH_INVALIDATE_CACHED_RIGHTS);
}
post_event_if_success(vp, error, NOTE_ATTRIB);
return error;
}
errno_t
VNOP_REMOVEXATTR(vnode_t vp, const char *name, int options, vfs_context_t ctx)
{
struct vnop_removexattr_args a;
int error;
a.a_desc = &vnop_removexattr_desc;
a.a_vp = vp;
a.a_name = name;
a.a_options = options;
a.a_context = ctx;
error = (*vp->v_op[vnop_removexattr_desc.vdesc_offset])(&a);
DTRACE_FSINFO(removexattr, vnode_t, vp);
post_event_if_success(vp, error, NOTE_ATTRIB);
return error;
}
errno_t
VNOP_LISTXATTR(vnode_t vp, uio_t uio, size_t *size, int options, vfs_context_t ctx)
{
struct vnop_listxattr_args a;
int error;
a.a_desc = &vnop_listxattr_desc;
a.a_vp = vp;
a.a_uio = uio;
a.a_size = size;
a.a_options = options;
a.a_context = ctx;
error = (*vp->v_op[vnop_listxattr_desc.vdesc_offset])(&a);
DTRACE_FSINFO(listxattr, vnode_t, vp);
return error;
}
#if 0
/*
*#
*#% blktooff vp = = =
*#
*/
struct vnop_blktooff_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
daddr64_t a_lblkno;
off_t *a_offset;
};
#endif /* 0*/
errno_t
VNOP_BLKTOOFF(struct vnode *vp, daddr64_t lblkno, off_t *offset)
{
int _err;
struct vnop_blktooff_args a;
a.a_desc = &vnop_blktooff_desc;
a.a_vp = vp;
a.a_lblkno = lblkno;
a.a_offset = offset;
_err = (*vp->v_op[vnop_blktooff_desc.vdesc_offset])(&a);
DTRACE_FSINFO(blktooff, vnode_t, vp);
return _err;
}
#if 0
/*
*#
*#% offtoblk vp = = =
*#
*/
struct vnop_offtoblk_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
off_t a_offset;
daddr64_t *a_lblkno;
};
#endif /* 0*/
errno_t
VNOP_OFFTOBLK(struct vnode *vp, off_t offset, daddr64_t *lblkno)
{
int _err;
struct vnop_offtoblk_args a;
a.a_desc = &vnop_offtoblk_desc;
a.a_vp = vp;
a.a_offset = offset;
a.a_lblkno = lblkno;
_err = (*vp->v_op[vnop_offtoblk_desc.vdesc_offset])(&a);
DTRACE_FSINFO(offtoblk, vnode_t, vp);
return _err;
}
#if 0
/*
*#
*#% ap vp L L L
*#
*/
struct vnop_verify_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
off_t a_foffset;
char *a_buf;
size_t a_bufsize;
size_t *a_verifyblksize;
void **a_verify_ctxp;
int a_flags;
vfs_context_t a_context;
};
#endif
errno_t
VNOP_VERIFY(struct vnode *vp, off_t foffset, uint8_t *buf, size_t bufsize,
size_t *verify_block_size, void **verify_ctxp, vnode_verify_flags_t flags,
vfs_context_t ctx)
{
int _err;
struct vnop_verify_args a;
if (ctx == NULL) {
ctx = vfs_context_kernel();
}
a.a_desc = &vnop_verify_desc;
a.a_vp = vp;
a.a_foffset = foffset;
a.a_buf = buf;
a.a_bufsize = bufsize;
a.a_verifyblksize = verify_block_size;
a.a_flags = flags;
a.a_verify_ctxp = verify_ctxp;
a.a_context = ctx;
_err = (*vp->v_op[vnop_verify_desc.vdesc_offset])(&a);
DTRACE_FSINFO(verify, vnode_t, vp);
/* It is not an error for a filesystem to not support this VNOP */
if (_err == ENOTSUP) {
if (!buf && verify_block_size) {
*verify_block_size = 0;
}
_err = 0;
}
return _err;
}
#if 0
/*
*#
*#% blockmap vp L L L
*#
*/
struct vnop_blockmap_args {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
off_t a_foffset;
size_t a_size;
daddr64_t *a_bpn;
size_t *a_run;
void *a_poff;
int a_flags;
vfs_context_t a_context;
};
#endif /* 0*/
errno_t
VNOP_BLOCKMAP(struct vnode *vp, off_t foffset, size_t size, daddr64_t *bpn, size_t *run, void *poff, int flags, vfs_context_t ctx)
{
int _err;
struct vnop_blockmap_args a;
size_t localrun = 0;
if (ctx == NULL) {
ctx = vfs_context_current();
}
a.a_desc = &vnop_blockmap_desc;
a.a_vp = vp;
a.a_foffset = foffset;
a.a_size = size;
a.a_bpn = bpn;
a.a_run = &localrun;
a.a_poff = poff;
a.a_flags = flags;
a.a_context = ctx;
_err = (*vp->v_op[vnop_blockmap_desc.vdesc_offset])(&a);
DTRACE_FSINFO(blockmap, vnode_t, vp);
/*
* We used a local variable to request information from the underlying
* filesystem about the length of the I/O run in question. If
* we get malformed output from the filesystem, we cap it to the length
* requested, at most. Update 'run' on the way out.
*/
if (_err == 0) {
if (localrun > size) {
localrun = size;
}
if (run) {
*run = localrun;
}
}
return _err;
}
#if 0
struct vnop_strategy_args {
struct vnodeop_desc *a_desc;
struct buf *a_bp;
};
#endif /* 0*/
errno_t
VNOP_STRATEGY(struct buf *bp)
{
int _err;
struct vnop_strategy_args a;
vnode_t vp = buf_vnode(bp);
a.a_desc = &vnop_strategy_desc;
a.a_bp = bp;
_err = (*vp->v_op[vnop_strategy_desc.vdesc_offset])(&a);
DTRACE_FSINFO(strategy, vnode_t, vp);
return _err;
}
#if 0
struct vnop_bwrite_args {
struct vnodeop_desc *a_desc;
buf_t a_bp;
};
#endif /* 0*/
errno_t
VNOP_BWRITE(struct buf *bp)
{
int _err;
struct vnop_bwrite_args a;
vnode_t vp = buf_vnode(bp);
a.a_desc = &vnop_bwrite_desc;
a.a_bp = bp;
_err = (*vp->v_op[vnop_bwrite_desc.vdesc_offset])(&a);
DTRACE_FSINFO(bwrite, vnode_t, vp);
return _err;
}
#if 0
struct vnop_kqfilt_add_args {
struct vnodeop_desc *a_desc;
struct vnode *a_vp;
struct knote *a_kn;
vfs_context_t a_context;
};
#endif
errno_t
VNOP_KQFILT_ADD(struct vnode *vp, struct knote *kn, vfs_context_t ctx)
{
int _err;
struct vnop_kqfilt_add_args a;
a.a_desc = VDESC(vnop_kqfilt_add);
a.a_vp = vp;
a.a_kn = kn;
a.a_context = ctx;
_err = (*vp->v_op[vnop_kqfilt_add_desc.vdesc_offset])(&a);
DTRACE_FSINFO(kqfilt_add, vnode_t, vp);
return _err;
}
#if 0
struct vnop_kqfilt_remove_args {
struct vnodeop_desc *a_desc;
struct vnode *a_vp;
uintptr_t a_ident;
vfs_context_t a_context;
};
#endif
errno_t
VNOP_KQFILT_REMOVE(struct vnode *vp, uintptr_t ident, vfs_context_t ctx)
{
int _err;
struct vnop_kqfilt_remove_args a;
a.a_desc = VDESC(vnop_kqfilt_remove);
a.a_vp = vp;
a.a_ident = ident;
a.a_context = ctx;
_err = (*vp->v_op[vnop_kqfilt_remove_desc.vdesc_offset])(&a);
DTRACE_FSINFO(kqfilt_remove, vnode_t, vp);
return _err;
}
errno_t
VNOP_MONITOR(vnode_t vp, uint32_t events, uint32_t flags, void *handle, vfs_context_t ctx)
{
int _err;
struct vnop_monitor_args a;
a.a_desc = VDESC(vnop_monitor);
a.a_vp = vp;
a.a_events = events;
a.a_flags = flags;
a.a_handle = handle;
a.a_context = ctx;
_err = (*vp->v_op[vnop_monitor_desc.vdesc_offset])(&a);
DTRACE_FSINFO(monitor, vnode_t, vp);
return _err;
}
#if 0
struct vnop_setlabel_args {
struct vnodeop_desc *a_desc;
struct vnode *a_vp;
struct label *a_vl;
vfs_context_t a_context;
};
#endif
errno_t
VNOP_SETLABEL(struct vnode *vp, struct label *label, vfs_context_t ctx)
{
int _err;
struct vnop_setlabel_args a;
a.a_desc = VDESC(vnop_setlabel);
a.a_vp = vp;
a.a_vl = label;
a.a_context = ctx;
_err = (*vp->v_op[vnop_setlabel_desc.vdesc_offset])(&a);
DTRACE_FSINFO(setlabel, vnode_t, vp);
return _err;
}
#if NAMEDSTREAMS
/*
* Get a named streamed
*/
errno_t
VNOP_GETNAMEDSTREAM(vnode_t vp, vnode_t *svpp, const char *name, enum nsoperation operation, int flags, vfs_context_t ctx)
{
int _err;
struct vnop_getnamedstream_args a;
a.a_desc = &vnop_getnamedstream_desc;
a.a_vp = vp;
a.a_svpp = svpp;
a.a_name = name;
a.a_operation = operation;
a.a_flags = flags;
a.a_context = ctx;
_err = (*vp->v_op[vnop_getnamedstream_desc.vdesc_offset])(&a);
DTRACE_FSINFO(getnamedstream, vnode_t, vp);
return _err;
}
/*
* Create a named streamed
*/
errno_t
VNOP_MAKENAMEDSTREAM(vnode_t vp, vnode_t *svpp, const char *name, int flags, vfs_context_t ctx)
{
int _err;
struct vnop_makenamedstream_args a;
a.a_desc = &vnop_makenamedstream_desc;
a.a_vp = vp;
a.a_svpp = svpp;
a.a_name = name;
a.a_flags = flags;
a.a_context = ctx;
_err = (*vp->v_op[vnop_makenamedstream_desc.vdesc_offset])(&a);
DTRACE_FSINFO(makenamedstream, vnode_t, vp);
return _err;
}
/*
* Remove a named streamed
*/
errno_t
VNOP_REMOVENAMEDSTREAM(vnode_t vp, vnode_t svp, const char *name, int flags, vfs_context_t ctx)
{
int _err;
struct vnop_removenamedstream_args a;
a.a_desc = &vnop_removenamedstream_desc;
a.a_vp = vp;
a.a_svp = svp;
a.a_name = name;
a.a_flags = flags;
a.a_context = ctx;
_err = (*vp->v_op[vnop_removenamedstream_desc.vdesc_offset])(&a);
DTRACE_FSINFO(removenamedstream, vnode_t, vp);
return _err;
}
#endif
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