5017 lines
108 KiB
C
5017 lines
108 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*
|
|
* 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. 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.
|
|
*
|
|
* @(#)vfs_syscalls.c 8.13 (Berkeley) 4/15/94
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#include "opt_capsicum.h"
|
|
#include "opt_ktrace.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#ifdef COMPAT_FREEBSD11
|
|
#include <sys/abi_compat.h>
|
|
#endif
|
|
#include <sys/bio.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/capsicum.h>
|
|
#include <sys/disk.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/sysproto.h>
|
|
#include <sys/namei.h>
|
|
#include <sys/filedesc.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/fcntl.h>
|
|
#include <sys/file.h>
|
|
#include <sys/filio.h>
|
|
#include <sys/limits.h>
|
|
#include <sys/linker.h>
|
|
#include <sys/rwlock.h>
|
|
#include <sys/sdt.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/sx.h>
|
|
#include <sys/unistd.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/priv.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/dirent.h>
|
|
#include <sys/jail.h>
|
|
#include <sys/syscallsubr.h>
|
|
#include <sys/sysctl.h>
|
|
#ifdef KTRACE
|
|
#include <sys/ktrace.h>
|
|
#endif
|
|
|
|
#include <machine/stdarg.h>
|
|
|
|
#include <security/audit/audit.h>
|
|
#include <security/mac/mac_framework.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_object.h>
|
|
#include <vm/vm_page.h>
|
|
#include <vm/uma.h>
|
|
|
|
#include <fs/devfs/devfs.h>
|
|
|
|
MALLOC_DEFINE(M_FADVISE, "fadvise", "posix_fadvise(2) information");
|
|
|
|
static int kern_chflagsat(struct thread *td, int fd, const char *path,
|
|
enum uio_seg pathseg, u_long flags, int atflag);
|
|
static int setfflags(struct thread *td, struct vnode *, u_long);
|
|
static int getutimes(const struct timeval *, enum uio_seg, struct timespec *);
|
|
static int getutimens(const struct timespec *, enum uio_seg,
|
|
struct timespec *, int *);
|
|
static int setutimes(struct thread *td, struct vnode *,
|
|
const struct timespec *, int, int);
|
|
static int vn_access(struct vnode *vp, int user_flags, struct ucred *cred,
|
|
struct thread *td);
|
|
static int kern_fhlinkat(struct thread *td, int fd, const char *path,
|
|
enum uio_seg pathseg, fhandle_t *fhp);
|
|
static int kern_readlink_vp(struct vnode *vp, char *buf, enum uio_seg bufseg,
|
|
size_t count, struct thread *td);
|
|
static int kern_linkat_vp(struct thread *td, struct vnode *vp, int fd,
|
|
const char *path, enum uio_seg segflag);
|
|
|
|
uint64_t
|
|
at2cnpflags(u_int at_flags, u_int mask)
|
|
{
|
|
uint64_t res;
|
|
|
|
MPASS((at_flags & (AT_SYMLINK_FOLLOW | AT_SYMLINK_NOFOLLOW)) !=
|
|
(AT_SYMLINK_FOLLOW | AT_SYMLINK_NOFOLLOW));
|
|
|
|
res = 0;
|
|
at_flags &= mask;
|
|
if ((at_flags & AT_RESOLVE_BENEATH) != 0)
|
|
res |= RBENEATH;
|
|
if ((at_flags & AT_SYMLINK_FOLLOW) != 0)
|
|
res |= FOLLOW;
|
|
/* NOFOLLOW is pseudo flag */
|
|
if ((mask & AT_SYMLINK_NOFOLLOW) != 0) {
|
|
res |= (at_flags & AT_SYMLINK_NOFOLLOW) != 0 ? NOFOLLOW :
|
|
FOLLOW;
|
|
}
|
|
if ((mask & AT_EMPTY_PATH) != 0 && (at_flags & AT_EMPTY_PATH) != 0)
|
|
res |= EMPTYPATH;
|
|
return (res);
|
|
}
|
|
|
|
int
|
|
kern_sync(struct thread *td)
|
|
{
|
|
struct mount *mp, *nmp;
|
|
int save;
|
|
|
|
mtx_lock(&mountlist_mtx);
|
|
for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) {
|
|
if (vfs_busy(mp, MBF_NOWAIT | MBF_MNTLSTLOCK)) {
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
continue;
|
|
}
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0 &&
|
|
vn_start_write(NULL, &mp, V_NOWAIT) == 0) {
|
|
save = curthread_pflags_set(TDP_SYNCIO);
|
|
vfs_periodic(mp, MNT_NOWAIT);
|
|
VFS_SYNC(mp, MNT_NOWAIT);
|
|
curthread_pflags_restore(save);
|
|
vn_finished_write(mp);
|
|
}
|
|
mtx_lock(&mountlist_mtx);
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
vfs_unbusy(mp);
|
|
}
|
|
mtx_unlock(&mountlist_mtx);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Sync each mounted filesystem.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct sync_args {
|
|
int dummy;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
sys_sync(struct thread *td, struct sync_args *uap)
|
|
{
|
|
|
|
return (kern_sync(td));
|
|
}
|
|
|
|
/*
|
|
* Change filesystem quotas.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct quotactl_args {
|
|
char *path;
|
|
int cmd;
|
|
int uid;
|
|
caddr_t arg;
|
|
};
|
|
#endif
|
|
int
|
|
sys_quotactl(struct thread *td, struct quotactl_args *uap)
|
|
{
|
|
struct mount *mp;
|
|
struct nameidata nd;
|
|
int error;
|
|
bool mp_busy;
|
|
|
|
AUDIT_ARG_CMD(uap->cmd);
|
|
AUDIT_ARG_UID(uap->uid);
|
|
if (!prison_allow(td->td_ucred, PR_ALLOW_QUOTAS))
|
|
return (EPERM);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | AUDITVNODE1, UIO_USERSPACE,
|
|
uap->path);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE_PNBUF(&nd);
|
|
mp = nd.ni_vp->v_mount;
|
|
vfs_ref(mp);
|
|
vput(nd.ni_vp);
|
|
error = vfs_busy(mp, 0);
|
|
if (error != 0) {
|
|
vfs_rel(mp);
|
|
return (error);
|
|
}
|
|
mp_busy = true;
|
|
error = VFS_QUOTACTL(mp, uap->cmd, uap->uid, uap->arg, &mp_busy);
|
|
|
|
/*
|
|
* Since quota on/off operations typically need to open quota
|
|
* files, the implementation may need to unbusy the mount point
|
|
* before calling into namei. Otherwise, unmount might be
|
|
* started between two vfs_busy() invocations (first is ours,
|
|
* second is from mount point cross-walk code in lookup()),
|
|
* causing deadlock.
|
|
*
|
|
* Avoid unbusying mp if the implementation indicates it has
|
|
* already done so.
|
|
*/
|
|
if (mp_busy)
|
|
vfs_unbusy(mp);
|
|
vfs_rel(mp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Used by statfs conversion routines to scale the block size up if
|
|
* necessary so that all of the block counts are <= 'max_size'. Note
|
|
* that 'max_size' should be a bitmask, i.e. 2^n - 1 for some non-zero
|
|
* value of 'n'.
|
|
*/
|
|
void
|
|
statfs_scale_blocks(struct statfs *sf, long max_size)
|
|
{
|
|
uint64_t count;
|
|
int shift;
|
|
|
|
KASSERT(powerof2(max_size + 1), ("%s: invalid max_size", __func__));
|
|
|
|
/*
|
|
* Attempt to scale the block counts to give a more accurate
|
|
* overview to userland of the ratio of free space to used
|
|
* space. To do this, find the largest block count and compute
|
|
* a divisor that lets it fit into a signed integer <= max_size.
|
|
*/
|
|
if (sf->f_bavail < 0)
|
|
count = -sf->f_bavail;
|
|
else
|
|
count = sf->f_bavail;
|
|
count = MAX(sf->f_blocks, MAX(sf->f_bfree, count));
|
|
if (count <= max_size)
|
|
return;
|
|
|
|
count >>= flsl(max_size);
|
|
shift = 0;
|
|
while (count > 0) {
|
|
shift++;
|
|
count >>=1;
|
|
}
|
|
|
|
sf->f_bsize <<= shift;
|
|
sf->f_blocks >>= shift;
|
|
sf->f_bfree >>= shift;
|
|
sf->f_bavail >>= shift;
|
|
}
|
|
|
|
static int
|
|
kern_do_statfs(struct thread *td, struct mount *mp, struct statfs *buf)
|
|
{
|
|
int error;
|
|
|
|
if (mp == NULL)
|
|
return (EBADF);
|
|
error = vfs_busy(mp, 0);
|
|
vfs_rel(mp);
|
|
if (error != 0)
|
|
return (error);
|
|
#ifdef MAC
|
|
error = mac_mount_check_stat(td->td_ucred, mp);
|
|
if (error != 0)
|
|
goto out;
|
|
#endif
|
|
error = VFS_STATFS(mp, buf);
|
|
if (error != 0)
|
|
goto out;
|
|
if (priv_check_cred_vfs_generation(td->td_ucred)) {
|
|
buf->f_fsid.val[0] = buf->f_fsid.val[1] = 0;
|
|
prison_enforce_statfs(td->td_ucred, mp, buf);
|
|
}
|
|
out:
|
|
vfs_unbusy(mp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct statfs_args {
|
|
char *path;
|
|
struct statfs *buf;
|
|
};
|
|
#endif
|
|
int
|
|
sys_statfs(struct thread *td, struct statfs_args *uap)
|
|
{
|
|
struct statfs *sfp;
|
|
int error;
|
|
|
|
sfp = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
|
|
error = kern_statfs(td, uap->path, UIO_USERSPACE, sfp);
|
|
if (error == 0)
|
|
error = copyout(sfp, uap->buf, sizeof(struct statfs));
|
|
free(sfp, M_STATFS);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_statfs(struct thread *td, const char *path, enum uio_seg pathseg,
|
|
struct statfs *buf)
|
|
{
|
|
struct mount *mp;
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNODE1, pathseg, path);
|
|
error = namei(&nd);
|
|
if (error != 0)
|
|
return (error);
|
|
NDFREE_PNBUF(&nd);
|
|
mp = vfs_ref_from_vp(nd.ni_vp);
|
|
vrele(nd.ni_vp);
|
|
return (kern_do_statfs(td, mp, buf));
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fstatfs_args {
|
|
int fd;
|
|
struct statfs *buf;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fstatfs(struct thread *td, struct fstatfs_args *uap)
|
|
{
|
|
struct statfs *sfp;
|
|
int error;
|
|
|
|
sfp = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
|
|
error = kern_fstatfs(td, uap->fd, sfp);
|
|
if (error == 0)
|
|
error = copyout(sfp, uap->buf, sizeof(struct statfs));
|
|
free(sfp, M_STATFS);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_fstatfs(struct thread *td, int fd, struct statfs *buf)
|
|
{
|
|
struct file *fp;
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
AUDIT_ARG_FD(fd);
|
|
error = getvnode_path(td, fd, &cap_fstatfs_rights, &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
vp = fp->f_vnode;
|
|
#ifdef AUDIT
|
|
if (AUDITING_TD(td)) {
|
|
vn_lock(vp, LK_SHARED | LK_RETRY);
|
|
AUDIT_ARG_VNODE1(vp);
|
|
VOP_UNLOCK(vp);
|
|
}
|
|
#endif
|
|
mp = vfs_ref_from_vp(vp);
|
|
fdrop(fp, td);
|
|
return (kern_do_statfs(td, mp, buf));
|
|
}
|
|
|
|
/*
|
|
* Get statistics on all filesystems.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct getfsstat_args {
|
|
struct statfs *buf;
|
|
long bufsize;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_getfsstat(struct thread *td, struct getfsstat_args *uap)
|
|
{
|
|
size_t count;
|
|
int error;
|
|
|
|
if (uap->bufsize < 0 || uap->bufsize > SIZE_MAX)
|
|
return (EINVAL);
|
|
error = kern_getfsstat(td, &uap->buf, uap->bufsize, &count,
|
|
UIO_USERSPACE, uap->mode);
|
|
if (error == 0)
|
|
td->td_retval[0] = count;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* If (bufsize > 0 && bufseg == UIO_SYSSPACE)
|
|
* The caller is responsible for freeing memory which will be allocated
|
|
* in '*buf'.
|
|
*/
|
|
int
|
|
kern_getfsstat(struct thread *td, struct statfs **buf, size_t bufsize,
|
|
size_t *countp, enum uio_seg bufseg, int mode)
|
|
{
|
|
struct mount *mp, *nmp;
|
|
struct statfs *sfsp, *sp, *sptmp, *tofree;
|
|
size_t count, maxcount;
|
|
int error;
|
|
|
|
switch (mode) {
|
|
case MNT_WAIT:
|
|
case MNT_NOWAIT:
|
|
break;
|
|
default:
|
|
if (bufseg == UIO_SYSSPACE)
|
|
*buf = NULL;
|
|
return (EINVAL);
|
|
}
|
|
restart:
|
|
maxcount = bufsize / sizeof(struct statfs);
|
|
if (bufsize == 0) {
|
|
sfsp = NULL;
|
|
tofree = NULL;
|
|
} else if (bufseg == UIO_USERSPACE) {
|
|
sfsp = *buf;
|
|
tofree = NULL;
|
|
} else /* if (bufseg == UIO_SYSSPACE) */ {
|
|
count = 0;
|
|
mtx_lock(&mountlist_mtx);
|
|
TAILQ_FOREACH(mp, &mountlist, mnt_list) {
|
|
count++;
|
|
}
|
|
mtx_unlock(&mountlist_mtx);
|
|
if (maxcount > count)
|
|
maxcount = count;
|
|
tofree = sfsp = *buf = malloc(maxcount * sizeof(struct statfs),
|
|
M_STATFS, M_WAITOK);
|
|
}
|
|
|
|
count = 0;
|
|
|
|
/*
|
|
* If there is no target buffer they only want the count.
|
|
*
|
|
* This could be TAILQ_FOREACH but it is open-coded to match the original
|
|
* code below.
|
|
*/
|
|
if (sfsp == NULL) {
|
|
mtx_lock(&mountlist_mtx);
|
|
for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) {
|
|
if (prison_canseemount(td->td_ucred, mp) != 0) {
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
continue;
|
|
}
|
|
#ifdef MAC
|
|
if (mac_mount_check_stat(td->td_ucred, mp) != 0) {
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
continue;
|
|
}
|
|
#endif
|
|
count++;
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
}
|
|
mtx_unlock(&mountlist_mtx);
|
|
*countp = count;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* They want the entire thing.
|
|
*
|
|
* Short-circuit the corner case of no room for anything, avoids
|
|
* relocking below.
|
|
*/
|
|
if (maxcount < 1) {
|
|
goto out;
|
|
}
|
|
|
|
mtx_lock(&mountlist_mtx);
|
|
for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) {
|
|
if (prison_canseemount(td->td_ucred, mp) != 0) {
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
continue;
|
|
}
|
|
#ifdef MAC
|
|
if (mac_mount_check_stat(td->td_ucred, mp) != 0) {
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
continue;
|
|
}
|
|
#endif
|
|
if (mode == MNT_WAIT) {
|
|
if (vfs_busy(mp, MBF_MNTLSTLOCK) != 0) {
|
|
/*
|
|
* If vfs_busy() failed, and MBF_NOWAIT
|
|
* wasn't passed, then the mp is gone.
|
|
* Furthermore, because of MBF_MNTLSTLOCK,
|
|
* the mountlist_mtx was dropped. We have
|
|
* no other choice than to start over.
|
|
*/
|
|
mtx_unlock(&mountlist_mtx);
|
|
free(tofree, M_STATFS);
|
|
goto restart;
|
|
}
|
|
} else {
|
|
if (vfs_busy(mp, MBF_NOWAIT | MBF_MNTLSTLOCK) != 0) {
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
continue;
|
|
}
|
|
}
|
|
sp = &mp->mnt_stat;
|
|
/*
|
|
* If MNT_NOWAIT is specified, do not refresh
|
|
* the fsstat cache.
|
|
*/
|
|
if (mode != MNT_NOWAIT) {
|
|
error = VFS_STATFS(mp, sp);
|
|
if (error != 0) {
|
|
mtx_lock(&mountlist_mtx);
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
vfs_unbusy(mp);
|
|
continue;
|
|
}
|
|
}
|
|
if (priv_check_cred_vfs_generation(td->td_ucred)) {
|
|
sptmp = malloc(sizeof(struct statfs), M_STATFS,
|
|
M_WAITOK);
|
|
*sptmp = *sp;
|
|
sptmp->f_fsid.val[0] = sptmp->f_fsid.val[1] = 0;
|
|
prison_enforce_statfs(td->td_ucred, mp, sptmp);
|
|
sp = sptmp;
|
|
} else
|
|
sptmp = NULL;
|
|
if (bufseg == UIO_SYSSPACE) {
|
|
bcopy(sp, sfsp, sizeof(*sp));
|
|
free(sptmp, M_STATFS);
|
|
} else /* if (bufseg == UIO_USERSPACE) */ {
|
|
error = copyout(sp, sfsp, sizeof(*sp));
|
|
free(sptmp, M_STATFS);
|
|
if (error != 0) {
|
|
vfs_unbusy(mp);
|
|
return (error);
|
|
}
|
|
}
|
|
sfsp++;
|
|
count++;
|
|
|
|
if (count == maxcount) {
|
|
vfs_unbusy(mp);
|
|
goto out;
|
|
}
|
|
|
|
mtx_lock(&mountlist_mtx);
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
vfs_unbusy(mp);
|
|
}
|
|
mtx_unlock(&mountlist_mtx);
|
|
out:
|
|
*countp = count;
|
|
return (0);
|
|
}
|
|
|
|
#ifdef COMPAT_FREEBSD4
|
|
/*
|
|
* Get old format filesystem statistics.
|
|
*/
|
|
static void freebsd4_cvtstatfs(struct statfs *, struct ostatfs *);
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct freebsd4_statfs_args {
|
|
char *path;
|
|
struct ostatfs *buf;
|
|
};
|
|
#endif
|
|
int
|
|
freebsd4_statfs(struct thread *td, struct freebsd4_statfs_args *uap)
|
|
{
|
|
struct ostatfs osb;
|
|
struct statfs *sfp;
|
|
int error;
|
|
|
|
sfp = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
|
|
error = kern_statfs(td, uap->path, UIO_USERSPACE, sfp);
|
|
if (error == 0) {
|
|
freebsd4_cvtstatfs(sfp, &osb);
|
|
error = copyout(&osb, uap->buf, sizeof(osb));
|
|
}
|
|
free(sfp, M_STATFS);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct freebsd4_fstatfs_args {
|
|
int fd;
|
|
struct ostatfs *buf;
|
|
};
|
|
#endif
|
|
int
|
|
freebsd4_fstatfs(struct thread *td, struct freebsd4_fstatfs_args *uap)
|
|
{
|
|
struct ostatfs osb;
|
|
struct statfs *sfp;
|
|
int error;
|
|
|
|
sfp = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
|
|
error = kern_fstatfs(td, uap->fd, sfp);
|
|
if (error == 0) {
|
|
freebsd4_cvtstatfs(sfp, &osb);
|
|
error = copyout(&osb, uap->buf, sizeof(osb));
|
|
}
|
|
free(sfp, M_STATFS);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get statistics on all filesystems.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct freebsd4_getfsstat_args {
|
|
struct ostatfs *buf;
|
|
long bufsize;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
freebsd4_getfsstat(struct thread *td, struct freebsd4_getfsstat_args *uap)
|
|
{
|
|
struct statfs *buf, *sp;
|
|
struct ostatfs osb;
|
|
size_t count, size;
|
|
int error;
|
|
|
|
if (uap->bufsize < 0)
|
|
return (EINVAL);
|
|
count = uap->bufsize / sizeof(struct ostatfs);
|
|
if (count > SIZE_MAX / sizeof(struct statfs))
|
|
return (EINVAL);
|
|
size = count * sizeof(struct statfs);
|
|
error = kern_getfsstat(td, &buf, size, &count, UIO_SYSSPACE,
|
|
uap->mode);
|
|
if (error == 0)
|
|
td->td_retval[0] = count;
|
|
if (size != 0) {
|
|
sp = buf;
|
|
while (count != 0 && error == 0) {
|
|
freebsd4_cvtstatfs(sp, &osb);
|
|
error = copyout(&osb, uap->buf, sizeof(osb));
|
|
sp++;
|
|
uap->buf++;
|
|
count--;
|
|
}
|
|
free(buf, M_STATFS);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Implement fstatfs() for (NFS) file handles.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct freebsd4_fhstatfs_args {
|
|
struct fhandle *u_fhp;
|
|
struct ostatfs *buf;
|
|
};
|
|
#endif
|
|
int
|
|
freebsd4_fhstatfs(struct thread *td, struct freebsd4_fhstatfs_args *uap)
|
|
{
|
|
struct ostatfs osb;
|
|
struct statfs *sfp;
|
|
fhandle_t fh;
|
|
int error;
|
|
|
|
error = copyin(uap->u_fhp, &fh, sizeof(fhandle_t));
|
|
if (error != 0)
|
|
return (error);
|
|
sfp = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
|
|
error = kern_fhstatfs(td, fh, sfp);
|
|
if (error == 0) {
|
|
freebsd4_cvtstatfs(sfp, &osb);
|
|
error = copyout(&osb, uap->buf, sizeof(osb));
|
|
}
|
|
free(sfp, M_STATFS);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Convert a new format statfs structure to an old format statfs structure.
|
|
*/
|
|
static void
|
|
freebsd4_cvtstatfs(struct statfs *nsp, struct ostatfs *osp)
|
|
{
|
|
|
|
statfs_scale_blocks(nsp, LONG_MAX);
|
|
bzero(osp, sizeof(*osp));
|
|
osp->f_bsize = nsp->f_bsize;
|
|
osp->f_iosize = MIN(nsp->f_iosize, LONG_MAX);
|
|
osp->f_blocks = nsp->f_blocks;
|
|
osp->f_bfree = nsp->f_bfree;
|
|
osp->f_bavail = nsp->f_bavail;
|
|
osp->f_files = MIN(nsp->f_files, LONG_MAX);
|
|
osp->f_ffree = MIN(nsp->f_ffree, LONG_MAX);
|
|
osp->f_owner = nsp->f_owner;
|
|
osp->f_type = nsp->f_type;
|
|
osp->f_flags = nsp->f_flags;
|
|
osp->f_syncwrites = MIN(nsp->f_syncwrites, LONG_MAX);
|
|
osp->f_asyncwrites = MIN(nsp->f_asyncwrites, LONG_MAX);
|
|
osp->f_syncreads = MIN(nsp->f_syncreads, LONG_MAX);
|
|
osp->f_asyncreads = MIN(nsp->f_asyncreads, LONG_MAX);
|
|
strlcpy(osp->f_fstypename, nsp->f_fstypename,
|
|
MIN(MFSNAMELEN, OMFSNAMELEN));
|
|
strlcpy(osp->f_mntonname, nsp->f_mntonname,
|
|
MIN(MNAMELEN, OMNAMELEN));
|
|
strlcpy(osp->f_mntfromname, nsp->f_mntfromname,
|
|
MIN(MNAMELEN, OMNAMELEN));
|
|
osp->f_fsid = nsp->f_fsid;
|
|
}
|
|
#endif /* COMPAT_FREEBSD4 */
|
|
|
|
#if defined(COMPAT_FREEBSD11)
|
|
/*
|
|
* Get old format filesystem statistics.
|
|
*/
|
|
static void freebsd11_cvtstatfs(struct statfs *, struct freebsd11_statfs *);
|
|
|
|
int
|
|
freebsd11_statfs(struct thread *td, struct freebsd11_statfs_args *uap)
|
|
{
|
|
struct freebsd11_statfs osb;
|
|
struct statfs *sfp;
|
|
int error;
|
|
|
|
sfp = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
|
|
error = kern_statfs(td, uap->path, UIO_USERSPACE, sfp);
|
|
if (error == 0) {
|
|
freebsd11_cvtstatfs(sfp, &osb);
|
|
error = copyout(&osb, uap->buf, sizeof(osb));
|
|
}
|
|
free(sfp, M_STATFS);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
int
|
|
freebsd11_fstatfs(struct thread *td, struct freebsd11_fstatfs_args *uap)
|
|
{
|
|
struct freebsd11_statfs osb;
|
|
struct statfs *sfp;
|
|
int error;
|
|
|
|
sfp = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
|
|
error = kern_fstatfs(td, uap->fd, sfp);
|
|
if (error == 0) {
|
|
freebsd11_cvtstatfs(sfp, &osb);
|
|
error = copyout(&osb, uap->buf, sizeof(osb));
|
|
}
|
|
free(sfp, M_STATFS);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get statistics on all filesystems.
|
|
*/
|
|
int
|
|
freebsd11_getfsstat(struct thread *td, struct freebsd11_getfsstat_args *uap)
|
|
{
|
|
return (kern_freebsd11_getfsstat(td, uap->buf, uap->bufsize, uap->mode));
|
|
}
|
|
|
|
int
|
|
kern_freebsd11_getfsstat(struct thread *td, struct freebsd11_statfs * ubuf,
|
|
long bufsize, int mode)
|
|
{
|
|
struct freebsd11_statfs osb;
|
|
struct statfs *buf, *sp;
|
|
size_t count, size;
|
|
int error;
|
|
|
|
if (bufsize < 0)
|
|
return (EINVAL);
|
|
|
|
count = bufsize / sizeof(struct ostatfs);
|
|
size = count * sizeof(struct statfs);
|
|
error = kern_getfsstat(td, &buf, size, &count, UIO_SYSSPACE, mode);
|
|
if (error == 0)
|
|
td->td_retval[0] = count;
|
|
if (size > 0) {
|
|
sp = buf;
|
|
while (count > 0 && error == 0) {
|
|
freebsd11_cvtstatfs(sp, &osb);
|
|
error = copyout(&osb, ubuf, sizeof(osb));
|
|
sp++;
|
|
ubuf++;
|
|
count--;
|
|
}
|
|
free(buf, M_STATFS);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Implement fstatfs() for (NFS) file handles.
|
|
*/
|
|
int
|
|
freebsd11_fhstatfs(struct thread *td, struct freebsd11_fhstatfs_args *uap)
|
|
{
|
|
struct freebsd11_statfs osb;
|
|
struct statfs *sfp;
|
|
fhandle_t fh;
|
|
int error;
|
|
|
|
error = copyin(uap->u_fhp, &fh, sizeof(fhandle_t));
|
|
if (error)
|
|
return (error);
|
|
sfp = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
|
|
error = kern_fhstatfs(td, fh, sfp);
|
|
if (error == 0) {
|
|
freebsd11_cvtstatfs(sfp, &osb);
|
|
error = copyout(&osb, uap->buf, sizeof(osb));
|
|
}
|
|
free(sfp, M_STATFS);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Convert a new format statfs structure to an old format statfs structure.
|
|
*/
|
|
static void
|
|
freebsd11_cvtstatfs(struct statfs *nsp, struct freebsd11_statfs *osp)
|
|
{
|
|
|
|
bzero(osp, sizeof(*osp));
|
|
osp->f_version = FREEBSD11_STATFS_VERSION;
|
|
osp->f_type = nsp->f_type;
|
|
osp->f_flags = nsp->f_flags;
|
|
osp->f_bsize = nsp->f_bsize;
|
|
osp->f_iosize = nsp->f_iosize;
|
|
osp->f_blocks = nsp->f_blocks;
|
|
osp->f_bfree = nsp->f_bfree;
|
|
osp->f_bavail = nsp->f_bavail;
|
|
osp->f_files = nsp->f_files;
|
|
osp->f_ffree = nsp->f_ffree;
|
|
osp->f_syncwrites = nsp->f_syncwrites;
|
|
osp->f_asyncwrites = nsp->f_asyncwrites;
|
|
osp->f_syncreads = nsp->f_syncreads;
|
|
osp->f_asyncreads = nsp->f_asyncreads;
|
|
osp->f_namemax = nsp->f_namemax;
|
|
osp->f_owner = nsp->f_owner;
|
|
osp->f_fsid = nsp->f_fsid;
|
|
strlcpy(osp->f_fstypename, nsp->f_fstypename,
|
|
MIN(MFSNAMELEN, sizeof(osp->f_fstypename)));
|
|
strlcpy(osp->f_mntonname, nsp->f_mntonname,
|
|
MIN(MNAMELEN, sizeof(osp->f_mntonname)));
|
|
strlcpy(osp->f_mntfromname, nsp->f_mntfromname,
|
|
MIN(MNAMELEN, sizeof(osp->f_mntfromname)));
|
|
}
|
|
#endif /* COMPAT_FREEBSD11 */
|
|
|
|
/*
|
|
* Change current working directory to a given file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchdir_args {
|
|
int fd;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fchdir(struct thread *td, struct fchdir_args *uap)
|
|
{
|
|
struct vnode *vp, *tdp;
|
|
struct mount *mp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
AUDIT_ARG_FD(uap->fd);
|
|
error = getvnode_path(td, uap->fd, &cap_fchdir_rights,
|
|
&fp);
|
|
if (error != 0)
|
|
return (error);
|
|
vp = fp->f_vnode;
|
|
vrefact(vp);
|
|
fdrop(fp, td);
|
|
vn_lock(vp, LK_SHARED | LK_RETRY);
|
|
AUDIT_ARG_VNODE1(vp);
|
|
error = change_dir(vp, td);
|
|
while (!error && (mp = vp->v_mountedhere) != NULL) {
|
|
if (vfs_busy(mp, 0))
|
|
continue;
|
|
error = VFS_ROOT(mp, LK_SHARED, &tdp);
|
|
vfs_unbusy(mp);
|
|
if (error != 0)
|
|
break;
|
|
vput(vp);
|
|
vp = tdp;
|
|
}
|
|
if (error != 0) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
VOP_UNLOCK(vp);
|
|
pwd_chdir(td, vp);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Change current working directory (``.'').
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chdir_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
int
|
|
sys_chdir(struct thread *td, struct chdir_args *uap)
|
|
{
|
|
|
|
return (kern_chdir(td, uap->path, UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_chdir(struct thread *td, const char *path, enum uio_seg pathseg)
|
|
{
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF | AUDITVNODE1,
|
|
pathseg, path);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
if ((error = change_dir(nd.ni_vp, td)) != 0) {
|
|
vput(nd.ni_vp);
|
|
NDFREE_PNBUF(&nd);
|
|
return (error);
|
|
}
|
|
VOP_UNLOCK(nd.ni_vp);
|
|
NDFREE_PNBUF(&nd);
|
|
pwd_chdir(td, nd.ni_vp);
|
|
return (0);
|
|
}
|
|
|
|
static int unprivileged_chroot = 0;
|
|
SYSCTL_INT(_security_bsd, OID_AUTO, unprivileged_chroot, CTLFLAG_RW,
|
|
&unprivileged_chroot, 0,
|
|
"Unprivileged processes can use chroot(2)");
|
|
/*
|
|
* Change notion of root (``/'') directory.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chroot_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
int
|
|
sys_chroot(struct thread *td, struct chroot_args *uap)
|
|
{
|
|
struct nameidata nd;
|
|
struct proc *p;
|
|
int error;
|
|
|
|
error = priv_check(td, PRIV_VFS_CHROOT);
|
|
if (error != 0) {
|
|
p = td->td_proc;
|
|
PROC_LOCK(p);
|
|
if (unprivileged_chroot == 0 ||
|
|
(p->p_flag2 & P2_NO_NEW_PRIVS) == 0) {
|
|
PROC_UNLOCK(p);
|
|
return (error);
|
|
}
|
|
PROC_UNLOCK(p);
|
|
}
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF | AUDITVNODE1,
|
|
UIO_USERSPACE, uap->path);
|
|
error = namei(&nd);
|
|
if (error != 0)
|
|
return (error);
|
|
NDFREE_PNBUF(&nd);
|
|
error = change_dir(nd.ni_vp, td);
|
|
if (error != 0)
|
|
goto e_vunlock;
|
|
#ifdef MAC
|
|
error = mac_vnode_check_chroot(td->td_ucred, nd.ni_vp);
|
|
if (error != 0)
|
|
goto e_vunlock;
|
|
#endif
|
|
VOP_UNLOCK(nd.ni_vp);
|
|
error = pwd_chroot(td, nd.ni_vp);
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
e_vunlock:
|
|
vput(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common routine for chroot and chdir. Callers must provide a locked vnode
|
|
* instance.
|
|
*/
|
|
int
|
|
change_dir(struct vnode *vp, struct thread *td)
|
|
{
|
|
#ifdef MAC
|
|
int error;
|
|
#endif
|
|
|
|
ASSERT_VOP_LOCKED(vp, "change_dir(): vp not locked");
|
|
if (vp->v_type != VDIR)
|
|
return (ENOTDIR);
|
|
#ifdef MAC
|
|
error = mac_vnode_check_chdir(td->td_ucred, vp);
|
|
if (error != 0)
|
|
return (error);
|
|
#endif
|
|
return (VOP_ACCESS(vp, VEXEC, td->td_ucred, td));
|
|
}
|
|
|
|
static __inline void
|
|
flags_to_rights(int flags, cap_rights_t *rightsp)
|
|
{
|
|
if (flags & O_EXEC) {
|
|
cap_rights_set_one(rightsp, CAP_FEXECVE);
|
|
if (flags & O_PATH)
|
|
return;
|
|
} else {
|
|
switch ((flags & O_ACCMODE)) {
|
|
case O_RDONLY:
|
|
cap_rights_set_one(rightsp, CAP_READ);
|
|
break;
|
|
case O_RDWR:
|
|
cap_rights_set_one(rightsp, CAP_READ);
|
|
/* FALLTHROUGH */
|
|
case O_WRONLY:
|
|
cap_rights_set_one(rightsp, CAP_WRITE);
|
|
if (!(flags & (O_APPEND | O_TRUNC)))
|
|
cap_rights_set_one(rightsp, CAP_SEEK);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (flags & O_CREAT)
|
|
cap_rights_set_one(rightsp, CAP_CREATE);
|
|
|
|
if (flags & O_TRUNC)
|
|
cap_rights_set_one(rightsp, CAP_FTRUNCATE);
|
|
|
|
if (flags & (O_SYNC | O_FSYNC))
|
|
cap_rights_set_one(rightsp, CAP_FSYNC);
|
|
|
|
if (flags & (O_EXLOCK | O_SHLOCK))
|
|
cap_rights_set_one(rightsp, CAP_FLOCK);
|
|
}
|
|
|
|
/*
|
|
* Check permissions, allocate an open file structure, and call the device
|
|
* open routine if any.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct open_args {
|
|
char *path;
|
|
int flags;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_open(struct thread *td, struct open_args *uap)
|
|
{
|
|
|
|
return (kern_openat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->flags, uap->mode));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct openat_args {
|
|
int fd;
|
|
char *path;
|
|
int flag;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_openat(struct thread *td, struct openat_args *uap)
|
|
{
|
|
|
|
AUDIT_ARG_FD(uap->fd);
|
|
return (kern_openat(td, uap->fd, uap->path, UIO_USERSPACE, uap->flag,
|
|
uap->mode));
|
|
}
|
|
|
|
int
|
|
kern_openat(struct thread *td, int fd, const char *path, enum uio_seg pathseg,
|
|
int flags, int mode)
|
|
{
|
|
struct proc *p = td->td_proc;
|
|
struct filedesc *fdp;
|
|
struct pwddesc *pdp;
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
struct nameidata nd;
|
|
cap_rights_t rights;
|
|
int cmode, error, indx;
|
|
|
|
indx = -1;
|
|
fdp = p->p_fd;
|
|
pdp = p->p_pd;
|
|
|
|
AUDIT_ARG_FFLAGS(flags);
|
|
AUDIT_ARG_MODE(mode);
|
|
cap_rights_init_one(&rights, CAP_LOOKUP);
|
|
flags_to_rights(flags, &rights);
|
|
|
|
/*
|
|
* Only one of the O_EXEC, O_RDONLY, O_WRONLY and O_RDWR flags
|
|
* may be specified. On the other hand, for O_PATH any mode
|
|
* except O_EXEC is ignored.
|
|
*/
|
|
if ((flags & O_PATH) != 0) {
|
|
flags &= ~(O_CREAT | O_ACCMODE);
|
|
} else if ((flags & O_EXEC) != 0) {
|
|
if (flags & O_ACCMODE)
|
|
return (EINVAL);
|
|
} else if ((flags & O_ACCMODE) == O_ACCMODE) {
|
|
return (EINVAL);
|
|
} else {
|
|
flags = FFLAGS(flags);
|
|
}
|
|
|
|
/*
|
|
* Allocate a file structure. The descriptor to reference it
|
|
* is allocated and used by finstall_refed() below.
|
|
*/
|
|
error = falloc_noinstall(td, &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
/* Set the flags early so the finit in devfs can pick them up. */
|
|
fp->f_flag = flags & FMASK;
|
|
cmode = ((mode & ~pdp->pd_cmask) & ALLPERMS) & ~S_ISTXT;
|
|
NDINIT_ATRIGHTS(&nd, LOOKUP, FOLLOW | AUDITVNODE1 | WANTIOCTLCAPS,
|
|
pathseg, path, fd, &rights);
|
|
td->td_dupfd = -1; /* XXX check for fdopen */
|
|
error = vn_open_cred(&nd, &flags, cmode, VN_OPEN_WANTIOCTLCAPS,
|
|
td->td_ucred, fp);
|
|
if (error != 0) {
|
|
/*
|
|
* If the vn_open replaced the method vector, something
|
|
* wonderous happened deep below and we just pass it up
|
|
* pretending we know what we do.
|
|
*/
|
|
if (error == ENXIO && fp->f_ops != &badfileops) {
|
|
MPASS((flags & O_PATH) == 0);
|
|
goto success;
|
|
}
|
|
|
|
/*
|
|
* Handle special fdopen() case. bleh.
|
|
*
|
|
* Don't do this for relative (capability) lookups; we don't
|
|
* understand exactly what would happen, and we don't think
|
|
* that it ever should.
|
|
*/
|
|
if ((nd.ni_resflags & NIRES_STRICTREL) == 0 &&
|
|
(error == ENODEV || error == ENXIO) &&
|
|
td->td_dupfd >= 0) {
|
|
error = dupfdopen(td, fdp, td->td_dupfd, flags, error,
|
|
&indx);
|
|
if (error == 0)
|
|
goto success;
|
|
}
|
|
|
|
goto bad;
|
|
}
|
|
td->td_dupfd = 0;
|
|
NDFREE_PNBUF(&nd);
|
|
vp = nd.ni_vp;
|
|
|
|
/*
|
|
* Store the vnode, for any f_type. Typically, the vnode use
|
|
* count is decremented by direct call to vn_closefile() for
|
|
* files that switched type in the cdevsw fdopen() method.
|
|
*/
|
|
fp->f_vnode = vp;
|
|
|
|
/*
|
|
* If the file wasn't claimed by devfs bind it to the normal
|
|
* vnode operations here.
|
|
*/
|
|
if (fp->f_ops == &badfileops) {
|
|
KASSERT(vp->v_type != VFIFO || (flags & O_PATH) != 0,
|
|
("Unexpected fifo fp %p vp %p", fp, vp));
|
|
if ((flags & O_PATH) != 0) {
|
|
finit(fp, (flags & FMASK) | (fp->f_flag & FKQALLOWED),
|
|
DTYPE_VNODE, NULL, &path_fileops);
|
|
} else {
|
|
finit_vnode(fp, flags, NULL, &vnops);
|
|
}
|
|
}
|
|
|
|
VOP_UNLOCK(vp);
|
|
if (flags & O_TRUNC) {
|
|
error = fo_truncate(fp, 0, td->td_ucred, td);
|
|
if (error != 0)
|
|
goto bad;
|
|
}
|
|
success:
|
|
/*
|
|
* If we haven't already installed the FD (for dupfdopen), do so now.
|
|
*/
|
|
if (indx == -1) {
|
|
struct filecaps *fcaps;
|
|
|
|
#ifdef CAPABILITIES
|
|
if ((nd.ni_resflags & NIRES_STRICTREL) != 0)
|
|
fcaps = &nd.ni_filecaps;
|
|
else
|
|
#endif
|
|
fcaps = NULL;
|
|
error = finstall_refed(td, fp, &indx, flags, fcaps);
|
|
/* On success finstall_refed() consumes fcaps. */
|
|
if (error != 0) {
|
|
goto bad;
|
|
}
|
|
} else {
|
|
NDFREE_IOCTLCAPS(&nd);
|
|
falloc_abort(td, fp);
|
|
}
|
|
|
|
td->td_retval[0] = indx;
|
|
return (0);
|
|
bad:
|
|
KASSERT(indx == -1, ("indx=%d, should be -1", indx));
|
|
NDFREE_IOCTLCAPS(&nd);
|
|
falloc_abort(td, fp);
|
|
return (error);
|
|
}
|
|
|
|
#ifdef COMPAT_43
|
|
/*
|
|
* Create a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ocreat_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
ocreat(struct thread *td, struct ocreat_args *uap)
|
|
{
|
|
|
|
return (kern_openat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
O_WRONLY | O_CREAT | O_TRUNC, uap->mode));
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
/*
|
|
* Create a special file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mknodat_args {
|
|
int fd;
|
|
char *path;
|
|
mode_t mode;
|
|
dev_t dev;
|
|
};
|
|
#endif
|
|
int
|
|
sys_mknodat(struct thread *td, struct mknodat_args *uap)
|
|
{
|
|
|
|
return (kern_mknodat(td, uap->fd, uap->path, UIO_USERSPACE, uap->mode,
|
|
uap->dev));
|
|
}
|
|
|
|
#if defined(COMPAT_FREEBSD11)
|
|
int
|
|
freebsd11_mknod(struct thread *td,
|
|
struct freebsd11_mknod_args *uap)
|
|
{
|
|
|
|
return (kern_mknodat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->mode, uap->dev));
|
|
}
|
|
|
|
int
|
|
freebsd11_mknodat(struct thread *td,
|
|
struct freebsd11_mknodat_args *uap)
|
|
{
|
|
|
|
return (kern_mknodat(td, uap->fd, uap->path, UIO_USERSPACE, uap->mode,
|
|
uap->dev));
|
|
}
|
|
#endif /* COMPAT_FREEBSD11 */
|
|
|
|
int
|
|
kern_mknodat(struct thread *td, int fd, const char *path, enum uio_seg pathseg,
|
|
int mode, dev_t dev)
|
|
{
|
|
struct vnode *vp;
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
struct nameidata nd;
|
|
int error, whiteout = 0;
|
|
|
|
AUDIT_ARG_MODE(mode);
|
|
AUDIT_ARG_DEV(dev);
|
|
switch (mode & S_IFMT) {
|
|
case S_IFCHR:
|
|
case S_IFBLK:
|
|
error = priv_check(td, PRIV_VFS_MKNOD_DEV);
|
|
if (error == 0 && dev == VNOVAL)
|
|
error = EINVAL;
|
|
break;
|
|
case S_IFWHT:
|
|
error = priv_check(td, PRIV_VFS_MKNOD_WHT);
|
|
break;
|
|
case S_IFIFO:
|
|
if (dev == 0)
|
|
return (kern_mkfifoat(td, fd, path, pathseg, mode));
|
|
/* FALLTHROUGH */
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
if (error != 0)
|
|
return (error);
|
|
NDPREINIT(&nd);
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT_ATRIGHTS(&nd, CREATE, LOCKPARENT | AUDITVNODE1 | NOCACHE,
|
|
pathseg, path, fd, &cap_mknodat_rights);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp != NULL) {
|
|
NDFREE_PNBUF(&nd);
|
|
if (vp == nd.ni_dvp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(vp);
|
|
return (EEXIST);
|
|
} else {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = (mode & ALLPERMS) &
|
|
~td->td_proc->p_pd->pd_cmask;
|
|
vattr.va_rdev = dev;
|
|
whiteout = 0;
|
|
|
|
switch (mode & S_IFMT) {
|
|
case S_IFCHR:
|
|
vattr.va_type = VCHR;
|
|
break;
|
|
case S_IFBLK:
|
|
vattr.va_type = VBLK;
|
|
break;
|
|
case S_IFWHT:
|
|
whiteout = 1;
|
|
break;
|
|
default:
|
|
panic("kern_mknod: invalid mode");
|
|
}
|
|
}
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE_PNBUF(&nd);
|
|
vput(nd.ni_dvp);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | V_PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
#ifdef MAC
|
|
if (error == 0 && !whiteout)
|
|
error = mac_vnode_check_create(td->td_ucred, nd.ni_dvp,
|
|
&nd.ni_cnd, &vattr);
|
|
#endif
|
|
if (error == 0) {
|
|
if (whiteout)
|
|
error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, CREATE);
|
|
else {
|
|
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp,
|
|
&nd.ni_cnd, &vattr);
|
|
}
|
|
}
|
|
VOP_VPUT_PAIR(nd.ni_dvp, error == 0 && !whiteout ? &nd.ni_vp : NULL,
|
|
true);
|
|
vn_finished_write(mp);
|
|
NDFREE_PNBUF(&nd);
|
|
if (error == ERELOOKUP)
|
|
goto restart;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Create a named pipe.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mkfifo_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_mkfifo(struct thread *td, struct mkfifo_args *uap)
|
|
{
|
|
|
|
return (kern_mkfifoat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->mode));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mkfifoat_args {
|
|
int fd;
|
|
char *path;
|
|
mode_t mode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_mkfifoat(struct thread *td, struct mkfifoat_args *uap)
|
|
{
|
|
|
|
return (kern_mkfifoat(td, uap->fd, uap->path, UIO_USERSPACE,
|
|
uap->mode));
|
|
}
|
|
|
|
int
|
|
kern_mkfifoat(struct thread *td, int fd, const char *path,
|
|
enum uio_seg pathseg, int mode)
|
|
{
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
AUDIT_ARG_MODE(mode);
|
|
NDPREINIT(&nd);
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT_ATRIGHTS(&nd, CREATE, LOCKPARENT | AUDITVNODE1 | NOCACHE,
|
|
pathseg, path, fd, &cap_mkfifoat_rights);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
if (nd.ni_vp != NULL) {
|
|
NDFREE_PNBUF(&nd);
|
|
if (nd.ni_vp == nd.ni_dvp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(nd.ni_vp);
|
|
return (EEXIST);
|
|
}
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE_PNBUF(&nd);
|
|
vput(nd.ni_dvp);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | V_PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_type = VFIFO;
|
|
vattr.va_mode = (mode & ALLPERMS) & ~td->td_proc->p_pd->pd_cmask;
|
|
#ifdef MAC
|
|
error = mac_vnode_check_create(td->td_ucred, nd.ni_dvp, &nd.ni_cnd,
|
|
&vattr);
|
|
if (error != 0)
|
|
goto out;
|
|
#endif
|
|
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
|
|
#ifdef MAC
|
|
out:
|
|
#endif
|
|
VOP_VPUT_PAIR(nd.ni_dvp, error == 0 ? &nd.ni_vp : NULL, true);
|
|
vn_finished_write(mp);
|
|
NDFREE_PNBUF(&nd);
|
|
if (error == ERELOOKUP)
|
|
goto restart;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a hard file link.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct link_args {
|
|
char *path;
|
|
char *link;
|
|
};
|
|
#endif
|
|
int
|
|
sys_link(struct thread *td, struct link_args *uap)
|
|
{
|
|
|
|
return (kern_linkat(td, AT_FDCWD, AT_FDCWD, uap->path, uap->link,
|
|
UIO_USERSPACE, AT_SYMLINK_FOLLOW));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct linkat_args {
|
|
int fd1;
|
|
char *path1;
|
|
int fd2;
|
|
char *path2;
|
|
int flag;
|
|
};
|
|
#endif
|
|
int
|
|
sys_linkat(struct thread *td, struct linkat_args *uap)
|
|
{
|
|
|
|
return (kern_linkat(td, uap->fd1, uap->fd2, uap->path1, uap->path2,
|
|
UIO_USERSPACE, uap->flag));
|
|
}
|
|
|
|
int hardlink_check_uid = 0;
|
|
SYSCTL_INT(_security_bsd, OID_AUTO, hardlink_check_uid, CTLFLAG_RW,
|
|
&hardlink_check_uid, 0,
|
|
"Unprivileged processes cannot create hard links to files owned by other "
|
|
"users");
|
|
static int hardlink_check_gid = 0;
|
|
SYSCTL_INT(_security_bsd, OID_AUTO, hardlink_check_gid, CTLFLAG_RW,
|
|
&hardlink_check_gid, 0,
|
|
"Unprivileged processes cannot create hard links to files owned by other "
|
|
"groups");
|
|
|
|
static int
|
|
can_hardlink(struct vnode *vp, struct ucred *cred)
|
|
{
|
|
struct vattr va;
|
|
int error;
|
|
|
|
if (!hardlink_check_uid && !hardlink_check_gid)
|
|
return (0);
|
|
|
|
error = VOP_GETATTR(vp, &va, cred);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
if (hardlink_check_uid && cred->cr_uid != va.va_uid) {
|
|
error = priv_check_cred(cred, PRIV_VFS_LINK);
|
|
if (error != 0)
|
|
return (error);
|
|
}
|
|
|
|
if (hardlink_check_gid && !groupmember(va.va_gid, cred)) {
|
|
error = priv_check_cred(cred, PRIV_VFS_LINK);
|
|
if (error != 0)
|
|
return (error);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
kern_linkat(struct thread *td, int fd1, int fd2, const char *path1,
|
|
const char *path2, enum uio_seg segflag, int flag)
|
|
{
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
if ((flag & ~(AT_SYMLINK_FOLLOW | AT_RESOLVE_BENEATH |
|
|
AT_EMPTY_PATH)) != 0)
|
|
return (EINVAL);
|
|
|
|
NDPREINIT(&nd);
|
|
do {
|
|
bwillwrite();
|
|
NDINIT_ATRIGHTS(&nd, LOOKUP, AUDITVNODE1 | at2cnpflags(flag,
|
|
AT_SYMLINK_FOLLOW | AT_RESOLVE_BENEATH | AT_EMPTY_PATH),
|
|
segflag, path1, fd1, &cap_linkat_source_rights);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE_PNBUF(&nd);
|
|
if ((nd.ni_resflags & NIRES_EMPTYPATH) != 0) {
|
|
error = priv_check(td, PRIV_VFS_FHOPEN);
|
|
if (error != 0) {
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
}
|
|
error = kern_linkat_vp(td, nd.ni_vp, fd2, path2, segflag);
|
|
} while (error == EAGAIN || error == ERELOOKUP);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
kern_linkat_vp(struct thread *td, struct vnode *vp, int fd, const char *path,
|
|
enum uio_seg segflag)
|
|
{
|
|
struct nameidata nd;
|
|
struct mount *mp;
|
|
int error;
|
|
|
|
if (vp->v_type == VDIR) {
|
|
vrele(vp);
|
|
return (EPERM); /* POSIX */
|
|
}
|
|
NDINIT_ATRIGHTS(&nd, CREATE,
|
|
LOCKPARENT | AUDITVNODE2 | NOCACHE, segflag, path, fd,
|
|
&cap_linkat_target_rights);
|
|
if ((error = namei(&nd)) == 0) {
|
|
if (nd.ni_vp != NULL) {
|
|
NDFREE_PNBUF(&nd);
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(nd.ni_vp);
|
|
vrele(vp);
|
|
return (EEXIST);
|
|
} else if (nd.ni_dvp->v_mount != vp->v_mount) {
|
|
/*
|
|
* Cross-device link. No need to recheck
|
|
* vp->v_type, since it cannot change, except
|
|
* to VBAD.
|
|
*/
|
|
NDFREE_PNBUF(&nd);
|
|
vput(nd.ni_dvp);
|
|
vrele(vp);
|
|
return (EXDEV);
|
|
} else if (vn_lock(vp, LK_EXCLUSIVE) == 0) {
|
|
error = can_hardlink(vp, td->td_ucred);
|
|
#ifdef MAC
|
|
if (error == 0)
|
|
error = mac_vnode_check_link(td->td_ucred,
|
|
nd.ni_dvp, vp, &nd.ni_cnd);
|
|
#endif
|
|
if (error != 0) {
|
|
vput(vp);
|
|
vput(nd.ni_dvp);
|
|
NDFREE_PNBUF(&nd);
|
|
return (error);
|
|
}
|
|
error = vn_start_write(vp, &mp, V_NOWAIT);
|
|
if (error != 0) {
|
|
vput(vp);
|
|
vput(nd.ni_dvp);
|
|
NDFREE_PNBUF(&nd);
|
|
error = vn_start_write(NULL, &mp,
|
|
V_XSLEEP | V_PCATCH);
|
|
if (error != 0)
|
|
return (error);
|
|
return (EAGAIN);
|
|
}
|
|
error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd);
|
|
VOP_VPUT_PAIR(nd.ni_dvp, &vp, true);
|
|
vn_finished_write(mp);
|
|
NDFREE_PNBUF(&nd);
|
|
vp = NULL;
|
|
} else {
|
|
vput(nd.ni_dvp);
|
|
NDFREE_PNBUF(&nd);
|
|
vrele(vp);
|
|
return (EAGAIN);
|
|
}
|
|
}
|
|
if (vp != NULL)
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a symbolic link.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct symlink_args {
|
|
char *path;
|
|
char *link;
|
|
};
|
|
#endif
|
|
int
|
|
sys_symlink(struct thread *td, struct symlink_args *uap)
|
|
{
|
|
|
|
return (kern_symlinkat(td, uap->path, AT_FDCWD, uap->link,
|
|
UIO_USERSPACE));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct symlinkat_args {
|
|
char *path;
|
|
int fd;
|
|
char *path2;
|
|
};
|
|
#endif
|
|
int
|
|
sys_symlinkat(struct thread *td, struct symlinkat_args *uap)
|
|
{
|
|
|
|
return (kern_symlinkat(td, uap->path1, uap->fd, uap->path2,
|
|
UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_symlinkat(struct thread *td, const char *path1, int fd, const char *path2,
|
|
enum uio_seg segflg)
|
|
{
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
const char *syspath;
|
|
char *tmppath;
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
if (segflg == UIO_SYSSPACE) {
|
|
syspath = path1;
|
|
} else {
|
|
tmppath = uma_zalloc(namei_zone, M_WAITOK);
|
|
if ((error = copyinstr(path1, tmppath, MAXPATHLEN, NULL)) != 0)
|
|
goto out;
|
|
syspath = tmppath;
|
|
}
|
|
AUDIT_ARG_TEXT(syspath);
|
|
NDPREINIT(&nd);
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT_ATRIGHTS(&nd, CREATE, LOCKPARENT | AUDITVNODE1 | NOCACHE, segflg,
|
|
path2, fd, &cap_symlinkat_rights);
|
|
if ((error = namei(&nd)) != 0)
|
|
goto out;
|
|
if (nd.ni_vp) {
|
|
NDFREE_PNBUF(&nd);
|
|
if (nd.ni_vp == nd.ni_dvp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(nd.ni_vp);
|
|
nd.ni_vp = NULL;
|
|
error = EEXIST;
|
|
goto out;
|
|
}
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE_PNBUF(&nd);
|
|
vput(nd.ni_dvp);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | V_PCATCH)) != 0)
|
|
goto out;
|
|
goto restart;
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = ACCESSPERMS &~ td->td_proc->p_pd->pd_cmask;
|
|
#ifdef MAC
|
|
vattr.va_type = VLNK;
|
|
error = mac_vnode_check_create(td->td_ucred, nd.ni_dvp, &nd.ni_cnd,
|
|
&vattr);
|
|
if (error != 0)
|
|
goto out2;
|
|
#endif
|
|
error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, syspath);
|
|
#ifdef MAC
|
|
out2:
|
|
#endif
|
|
VOP_VPUT_PAIR(nd.ni_dvp, error == 0 ? &nd.ni_vp : NULL, true);
|
|
vn_finished_write(mp);
|
|
NDFREE_PNBUF(&nd);
|
|
if (error == ERELOOKUP)
|
|
goto restart;
|
|
out:
|
|
if (segflg != UIO_SYSSPACE)
|
|
uma_zfree(namei_zone, tmppath);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Delete a whiteout from the filesystem.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct undelete_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
int
|
|
sys_undelete(struct thread *td, struct undelete_args *uap)
|
|
{
|
|
struct mount *mp;
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
NDPREINIT(&nd);
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT(&nd, DELETE, LOCKPARENT | DOWHITEOUT | AUDITVNODE1,
|
|
UIO_USERSPACE, uap->path);
|
|
error = namei(&nd);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & ISWHITEOUT)) {
|
|
NDFREE_PNBUF(&nd);
|
|
if (nd.ni_vp == nd.ni_dvp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
if (nd.ni_vp)
|
|
vrele(nd.ni_vp);
|
|
return (EEXIST);
|
|
}
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE_PNBUF(&nd);
|
|
vput(nd.ni_dvp);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | V_PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, DELETE);
|
|
NDFREE_PNBUF(&nd);
|
|
vput(nd.ni_dvp);
|
|
vn_finished_write(mp);
|
|
if (error == ERELOOKUP)
|
|
goto restart;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Delete a name from the filesystem.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct unlink_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
int
|
|
sys_unlink(struct thread *td, struct unlink_args *uap)
|
|
{
|
|
|
|
return (kern_funlinkat(td, AT_FDCWD, uap->path, FD_NONE, UIO_USERSPACE,
|
|
0, 0));
|
|
}
|
|
|
|
static int
|
|
kern_funlinkat_ex(struct thread *td, int dfd, const char *path, int fd,
|
|
int flag, enum uio_seg pathseg, ino_t oldinum)
|
|
{
|
|
|
|
if ((flag & ~(AT_REMOVEDIR | AT_RESOLVE_BENEATH)) != 0)
|
|
return (EINVAL);
|
|
|
|
if ((flag & AT_REMOVEDIR) != 0)
|
|
return (kern_frmdirat(td, dfd, path, fd, UIO_USERSPACE, 0));
|
|
|
|
return (kern_funlinkat(td, dfd, path, fd, UIO_USERSPACE, 0, 0));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct unlinkat_args {
|
|
int fd;
|
|
char *path;
|
|
int flag;
|
|
};
|
|
#endif
|
|
int
|
|
sys_unlinkat(struct thread *td, struct unlinkat_args *uap)
|
|
{
|
|
|
|
return (kern_funlinkat_ex(td, uap->fd, uap->path, FD_NONE, uap->flag,
|
|
UIO_USERSPACE, 0));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct funlinkat_args {
|
|
int dfd;
|
|
const char *path;
|
|
int fd;
|
|
int flag;
|
|
};
|
|
#endif
|
|
int
|
|
sys_funlinkat(struct thread *td, struct funlinkat_args *uap)
|
|
{
|
|
|
|
return (kern_funlinkat_ex(td, uap->dfd, uap->path, uap->fd, uap->flag,
|
|
UIO_USERSPACE, 0));
|
|
}
|
|
|
|
int
|
|
kern_funlinkat(struct thread *td, int dfd, const char *path, int fd,
|
|
enum uio_seg pathseg, int flag, ino_t oldinum)
|
|
{
|
|
struct mount *mp;
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
struct nameidata nd;
|
|
struct stat sb;
|
|
int error;
|
|
|
|
fp = NULL;
|
|
if (fd != FD_NONE) {
|
|
error = getvnode_path(td, fd, &cap_no_rights, &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
}
|
|
|
|
NDPREINIT(&nd);
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT_ATRIGHTS(&nd, DELETE, LOCKPARENT | LOCKLEAF | AUDITVNODE1 |
|
|
at2cnpflags(flag, AT_RESOLVE_BENEATH),
|
|
pathseg, path, dfd, &cap_unlinkat_rights);
|
|
if ((error = namei(&nd)) != 0) {
|
|
if (error == EINVAL)
|
|
error = EPERM;
|
|
goto fdout;
|
|
}
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type == VDIR && oldinum == 0) {
|
|
error = EPERM; /* POSIX */
|
|
} else if (oldinum != 0 &&
|
|
((error = VOP_STAT(vp, &sb, td->td_ucred, NOCRED)) == 0) &&
|
|
sb.st_ino != oldinum) {
|
|
error = EIDRM; /* Identifier removed */
|
|
} else if (fp != NULL && fp->f_vnode != vp) {
|
|
if (VN_IS_DOOMED(fp->f_vnode))
|
|
error = EBADF;
|
|
else
|
|
error = EDEADLK;
|
|
} else {
|
|
/*
|
|
* The root of a mounted filesystem cannot be deleted.
|
|
*
|
|
* XXX: can this only be a VDIR case?
|
|
*/
|
|
if (vp->v_vflag & VV_ROOT)
|
|
error = EBUSY;
|
|
}
|
|
if (error == 0) {
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE_PNBUF(&nd);
|
|
vput(nd.ni_dvp);
|
|
if (vp == nd.ni_dvp)
|
|
vrele(vp);
|
|
else
|
|
vput(vp);
|
|
if ((error = vn_start_write(NULL, &mp,
|
|
V_XSLEEP | V_PCATCH)) != 0) {
|
|
goto fdout;
|
|
}
|
|
goto restart;
|
|
}
|
|
#ifdef MAC
|
|
error = mac_vnode_check_unlink(td->td_ucred, nd.ni_dvp, vp,
|
|
&nd.ni_cnd);
|
|
if (error != 0)
|
|
goto out;
|
|
#endif
|
|
vfs_notify_upper(vp, VFS_NOTIFY_UPPER_UNLINK);
|
|
error = VOP_REMOVE(nd.ni_dvp, vp, &nd.ni_cnd);
|
|
#ifdef MAC
|
|
out:
|
|
#endif
|
|
vn_finished_write(mp);
|
|
}
|
|
NDFREE_PNBUF(&nd);
|
|
vput(nd.ni_dvp);
|
|
if (vp == nd.ni_dvp)
|
|
vrele(vp);
|
|
else
|
|
vput(vp);
|
|
if (error == ERELOOKUP)
|
|
goto restart;
|
|
fdout:
|
|
if (fp != NULL)
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Reposition read/write file offset.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lseek_args {
|
|
int fd;
|
|
int pad;
|
|
off_t offset;
|
|
int whence;
|
|
};
|
|
#endif
|
|
int
|
|
sys_lseek(struct thread *td, struct lseek_args *uap)
|
|
{
|
|
|
|
return (kern_lseek(td, uap->fd, uap->offset, uap->whence));
|
|
}
|
|
|
|
int
|
|
kern_lseek(struct thread *td, int fd, off_t offset, int whence)
|
|
{
|
|
struct file *fp;
|
|
int error;
|
|
|
|
AUDIT_ARG_FD(fd);
|
|
error = fget(td, fd, &cap_seek_rights, &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
error = (fp->f_ops->fo_flags & DFLAG_SEEKABLE) != 0 ?
|
|
fo_seek(fp, offset, whence, td) : ESPIPE;
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
#if defined(COMPAT_43)
|
|
/*
|
|
* Reposition read/write file offset.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct olseek_args {
|
|
int fd;
|
|
long offset;
|
|
int whence;
|
|
};
|
|
#endif
|
|
int
|
|
olseek(struct thread *td, struct olseek_args *uap)
|
|
{
|
|
|
|
return (kern_lseek(td, uap->fd, uap->offset, uap->whence));
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
#if defined(COMPAT_FREEBSD6)
|
|
/* Version with the 'pad' argument */
|
|
int
|
|
freebsd6_lseek(struct thread *td, struct freebsd6_lseek_args *uap)
|
|
{
|
|
|
|
return (kern_lseek(td, uap->fd, uap->offset, uap->whence));
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Check access permissions using passed credentials.
|
|
*/
|
|
static int
|
|
vn_access(struct vnode *vp, int user_flags, struct ucred *cred,
|
|
struct thread *td)
|
|
{
|
|
accmode_t accmode;
|
|
int error;
|
|
|
|
/* Flags == 0 means only check for existence. */
|
|
if (user_flags == 0)
|
|
return (0);
|
|
|
|
accmode = 0;
|
|
if (user_flags & R_OK)
|
|
accmode |= VREAD;
|
|
if (user_flags & W_OK)
|
|
accmode |= VWRITE;
|
|
if (user_flags & X_OK)
|
|
accmode |= VEXEC;
|
|
#ifdef MAC
|
|
error = mac_vnode_check_access(cred, vp, accmode);
|
|
if (error != 0)
|
|
return (error);
|
|
#endif
|
|
if ((accmode & VWRITE) == 0 || (error = vn_writechk(vp)) == 0)
|
|
error = VOP_ACCESS(vp, accmode, cred, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check access permissions using "real" credentials.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct access_args {
|
|
char *path;
|
|
int amode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_access(struct thread *td, struct access_args *uap)
|
|
{
|
|
|
|
return (kern_accessat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
0, uap->amode));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct faccessat_args {
|
|
int dirfd;
|
|
char *path;
|
|
int amode;
|
|
int flag;
|
|
}
|
|
#endif
|
|
int
|
|
sys_faccessat(struct thread *td, struct faccessat_args *uap)
|
|
{
|
|
|
|
return (kern_accessat(td, uap->fd, uap->path, UIO_USERSPACE, uap->flag,
|
|
uap->amode));
|
|
}
|
|
|
|
int
|
|
kern_accessat(struct thread *td, int fd, const char *path,
|
|
enum uio_seg pathseg, int flag, int amode)
|
|
{
|
|
struct ucred *cred, *usecred;
|
|
struct vnode *vp;
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
if ((flag & ~(AT_EACCESS | AT_RESOLVE_BENEATH | AT_EMPTY_PATH)) != 0)
|
|
return (EINVAL);
|
|
if (amode != F_OK && (amode & ~(R_OK | W_OK | X_OK)) != 0)
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* Create and modify a temporary credential instead of one that
|
|
* is potentially shared (if we need one).
|
|
*/
|
|
cred = td->td_ucred;
|
|
if ((flag & AT_EACCESS) == 0 &&
|
|
((cred->cr_uid != cred->cr_ruid ||
|
|
cred->cr_rgid != cred->cr_groups[0]))) {
|
|
usecred = crdup(cred);
|
|
usecred->cr_uid = cred->cr_ruid;
|
|
usecred->cr_groups[0] = cred->cr_rgid;
|
|
td->td_ucred = usecred;
|
|
} else
|
|
usecred = cred;
|
|
AUDIT_ARG_VALUE(amode);
|
|
NDINIT_ATRIGHTS(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF |
|
|
AUDITVNODE1 | at2cnpflags(flag, AT_RESOLVE_BENEATH |
|
|
AT_EMPTY_PATH), pathseg, path, fd, &cap_fstat_rights);
|
|
if ((error = namei(&nd)) != 0)
|
|
goto out;
|
|
vp = nd.ni_vp;
|
|
|
|
error = vn_access(vp, amode, usecred, td);
|
|
NDFREE_PNBUF(&nd);
|
|
vput(vp);
|
|
out:
|
|
if (usecred != cred) {
|
|
td->td_ucred = cred;
|
|
crfree(usecred);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check access permissions using "effective" credentials.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct eaccess_args {
|
|
char *path;
|
|
int amode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_eaccess(struct thread *td, struct eaccess_args *uap)
|
|
{
|
|
|
|
return (kern_accessat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
AT_EACCESS, uap->amode));
|
|
}
|
|
|
|
#if defined(COMPAT_43)
|
|
/*
|
|
* Get file status; this version follows links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ostat_args {
|
|
char *path;
|
|
struct ostat *ub;
|
|
};
|
|
#endif
|
|
int
|
|
ostat(struct thread *td, struct ostat_args *uap)
|
|
{
|
|
struct stat sb;
|
|
struct ostat osb;
|
|
int error;
|
|
|
|
error = kern_statat(td, 0, AT_FDCWD, uap->path, UIO_USERSPACE, &sb);
|
|
if (error != 0)
|
|
return (error);
|
|
cvtstat(&sb, &osb);
|
|
return (copyout(&osb, uap->ub, sizeof (osb)));
|
|
}
|
|
|
|
/*
|
|
* Get file status; this version does not follow links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct olstat_args {
|
|
char *path;
|
|
struct ostat *ub;
|
|
};
|
|
#endif
|
|
int
|
|
olstat(struct thread *td, struct olstat_args *uap)
|
|
{
|
|
struct stat sb;
|
|
struct ostat osb;
|
|
int error;
|
|
|
|
error = kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, uap->path,
|
|
UIO_USERSPACE, &sb);
|
|
if (error != 0)
|
|
return (error);
|
|
cvtstat(&sb, &osb);
|
|
return (copyout(&osb, uap->ub, sizeof (osb)));
|
|
}
|
|
|
|
/*
|
|
* Convert from an old to a new stat structure.
|
|
* XXX: many values are blindly truncated.
|
|
*/
|
|
void
|
|
cvtstat(struct stat *st, struct ostat *ost)
|
|
{
|
|
|
|
bzero(ost, sizeof(*ost));
|
|
ost->st_dev = st->st_dev;
|
|
ost->st_ino = st->st_ino;
|
|
ost->st_mode = st->st_mode;
|
|
ost->st_nlink = st->st_nlink;
|
|
ost->st_uid = st->st_uid;
|
|
ost->st_gid = st->st_gid;
|
|
ost->st_rdev = st->st_rdev;
|
|
ost->st_size = MIN(st->st_size, INT32_MAX);
|
|
ost->st_atim = st->st_atim;
|
|
ost->st_mtim = st->st_mtim;
|
|
ost->st_ctim = st->st_ctim;
|
|
ost->st_blksize = st->st_blksize;
|
|
ost->st_blocks = st->st_blocks;
|
|
ost->st_flags = st->st_flags;
|
|
ost->st_gen = st->st_gen;
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
#if defined(COMPAT_43) || defined(COMPAT_FREEBSD11)
|
|
int ino64_trunc_error;
|
|
SYSCTL_INT(_vfs, OID_AUTO, ino64_trunc_error, CTLFLAG_RW,
|
|
&ino64_trunc_error, 0,
|
|
"Error on truncation of device, file or inode number, or link count");
|
|
|
|
int
|
|
freebsd11_cvtstat(struct stat *st, struct freebsd11_stat *ost)
|
|
{
|
|
|
|
ost->st_dev = st->st_dev;
|
|
if (ost->st_dev != st->st_dev) {
|
|
switch (ino64_trunc_error) {
|
|
default:
|
|
/*
|
|
* Since dev_t is almost raw, don't clamp to the
|
|
* maximum for case 2, but ignore the error.
|
|
*/
|
|
break;
|
|
case 1:
|
|
return (EOVERFLOW);
|
|
}
|
|
}
|
|
ost->st_ino = st->st_ino;
|
|
if (ost->st_ino != st->st_ino) {
|
|
switch (ino64_trunc_error) {
|
|
default:
|
|
case 0:
|
|
break;
|
|
case 1:
|
|
return (EOVERFLOW);
|
|
case 2:
|
|
ost->st_ino = UINT32_MAX;
|
|
break;
|
|
}
|
|
}
|
|
ost->st_mode = st->st_mode;
|
|
ost->st_nlink = st->st_nlink;
|
|
if (ost->st_nlink != st->st_nlink) {
|
|
switch (ino64_trunc_error) {
|
|
default:
|
|
case 0:
|
|
break;
|
|
case 1:
|
|
return (EOVERFLOW);
|
|
case 2:
|
|
ost->st_nlink = UINT16_MAX;
|
|
break;
|
|
}
|
|
}
|
|
ost->st_uid = st->st_uid;
|
|
ost->st_gid = st->st_gid;
|
|
ost->st_rdev = st->st_rdev;
|
|
if (ost->st_rdev != st->st_rdev) {
|
|
switch (ino64_trunc_error) {
|
|
default:
|
|
break;
|
|
case 1:
|
|
return (EOVERFLOW);
|
|
}
|
|
}
|
|
ost->st_atim = st->st_atim;
|
|
ost->st_mtim = st->st_mtim;
|
|
ost->st_ctim = st->st_ctim;
|
|
ost->st_size = st->st_size;
|
|
ost->st_blocks = st->st_blocks;
|
|
ost->st_blksize = st->st_blksize;
|
|
ost->st_flags = st->st_flags;
|
|
ost->st_gen = st->st_gen;
|
|
ost->st_lspare = 0;
|
|
ost->st_birthtim = st->st_birthtim;
|
|
bzero((char *)&ost->st_birthtim + sizeof(ost->st_birthtim),
|
|
sizeof(*ost) - offsetof(struct freebsd11_stat,
|
|
st_birthtim) - sizeof(ost->st_birthtim));
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
freebsd11_stat(struct thread *td, struct freebsd11_stat_args* uap)
|
|
{
|
|
struct stat sb;
|
|
struct freebsd11_stat osb;
|
|
int error;
|
|
|
|
error = kern_statat(td, 0, AT_FDCWD, uap->path, UIO_USERSPACE, &sb);
|
|
if (error != 0)
|
|
return (error);
|
|
error = freebsd11_cvtstat(&sb, &osb);
|
|
if (error == 0)
|
|
error = copyout(&osb, uap->ub, sizeof(osb));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
freebsd11_lstat(struct thread *td, struct freebsd11_lstat_args* uap)
|
|
{
|
|
struct stat sb;
|
|
struct freebsd11_stat osb;
|
|
int error;
|
|
|
|
error = kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, uap->path,
|
|
UIO_USERSPACE, &sb);
|
|
if (error != 0)
|
|
return (error);
|
|
error = freebsd11_cvtstat(&sb, &osb);
|
|
if (error == 0)
|
|
error = copyout(&osb, uap->ub, sizeof(osb));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
freebsd11_fhstat(struct thread *td, struct freebsd11_fhstat_args* uap)
|
|
{
|
|
struct fhandle fh;
|
|
struct stat sb;
|
|
struct freebsd11_stat osb;
|
|
int error;
|
|
|
|
error = copyin(uap->u_fhp, &fh, sizeof(fhandle_t));
|
|
if (error != 0)
|
|
return (error);
|
|
error = kern_fhstat(td, fh, &sb);
|
|
if (error != 0)
|
|
return (error);
|
|
error = freebsd11_cvtstat(&sb, &osb);
|
|
if (error == 0)
|
|
error = copyout(&osb, uap->sb, sizeof(osb));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
freebsd11_fstatat(struct thread *td, struct freebsd11_fstatat_args* uap)
|
|
{
|
|
struct stat sb;
|
|
struct freebsd11_stat osb;
|
|
int error;
|
|
|
|
error = kern_statat(td, uap->flag, uap->fd, uap->path,
|
|
UIO_USERSPACE, &sb);
|
|
if (error != 0)
|
|
return (error);
|
|
error = freebsd11_cvtstat(&sb, &osb);
|
|
if (error == 0)
|
|
error = copyout(&osb, uap->buf, sizeof(osb));
|
|
return (error);
|
|
}
|
|
#endif /* COMPAT_FREEBSD11 */
|
|
|
|
/*
|
|
* Get file status
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fstatat_args {
|
|
int fd;
|
|
char *path;
|
|
struct stat *buf;
|
|
int flag;
|
|
}
|
|
#endif
|
|
int
|
|
sys_fstatat(struct thread *td, struct fstatat_args *uap)
|
|
{
|
|
struct stat sb;
|
|
int error;
|
|
|
|
error = kern_statat(td, uap->flag, uap->fd, uap->path,
|
|
UIO_USERSPACE, &sb);
|
|
if (error == 0)
|
|
error = copyout(&sb, uap->buf, sizeof (sb));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_statat(struct thread *td, int flag, int fd, const char *path,
|
|
enum uio_seg pathseg, struct stat *sbp)
|
|
{
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
if ((flag & ~(AT_SYMLINK_NOFOLLOW | AT_RESOLVE_BENEATH |
|
|
AT_EMPTY_PATH)) != 0)
|
|
return (EINVAL);
|
|
|
|
NDINIT_ATRIGHTS(&nd, LOOKUP, at2cnpflags(flag, AT_RESOLVE_BENEATH |
|
|
AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH) | LOCKSHARED | LOCKLEAF |
|
|
AUDITVNODE1, pathseg, path, fd, &cap_fstat_rights);
|
|
|
|
if ((error = namei(&nd)) != 0) {
|
|
if (error == ENOTDIR &&
|
|
(nd.ni_resflags & NIRES_EMPTYPATH) != 0)
|
|
error = kern_fstat(td, fd, sbp);
|
|
return (error);
|
|
}
|
|
error = VOP_STAT(nd.ni_vp, sbp, td->td_ucred, NOCRED);
|
|
NDFREE_PNBUF(&nd);
|
|
vput(nd.ni_vp);
|
|
#ifdef __STAT_TIME_T_EXT
|
|
sbp->st_atim_ext = 0;
|
|
sbp->st_mtim_ext = 0;
|
|
sbp->st_ctim_ext = 0;
|
|
sbp->st_btim_ext = 0;
|
|
#endif
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_STRUCT))
|
|
ktrstat_error(sbp, error);
|
|
#endif
|
|
return (error);
|
|
}
|
|
|
|
#if defined(COMPAT_FREEBSD11)
|
|
/*
|
|
* Implementation of the NetBSD [l]stat() functions.
|
|
*/
|
|
int
|
|
freebsd11_cvtnstat(struct stat *sb, struct nstat *nsb)
|
|
{
|
|
struct freebsd11_stat sb11;
|
|
int error;
|
|
|
|
error = freebsd11_cvtstat(sb, &sb11);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
bzero(nsb, sizeof(*nsb));
|
|
CP(sb11, *nsb, st_dev);
|
|
CP(sb11, *nsb, st_ino);
|
|
CP(sb11, *nsb, st_mode);
|
|
CP(sb11, *nsb, st_nlink);
|
|
CP(sb11, *nsb, st_uid);
|
|
CP(sb11, *nsb, st_gid);
|
|
CP(sb11, *nsb, st_rdev);
|
|
CP(sb11, *nsb, st_atim);
|
|
CP(sb11, *nsb, st_mtim);
|
|
CP(sb11, *nsb, st_ctim);
|
|
CP(sb11, *nsb, st_size);
|
|
CP(sb11, *nsb, st_blocks);
|
|
CP(sb11, *nsb, st_blksize);
|
|
CP(sb11, *nsb, st_flags);
|
|
CP(sb11, *nsb, st_gen);
|
|
CP(sb11, *nsb, st_birthtim);
|
|
return (0);
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct freebsd11_nstat_args {
|
|
char *path;
|
|
struct nstat *ub;
|
|
};
|
|
#endif
|
|
int
|
|
freebsd11_nstat(struct thread *td, struct freebsd11_nstat_args *uap)
|
|
{
|
|
struct stat sb;
|
|
struct nstat nsb;
|
|
int error;
|
|
|
|
error = kern_statat(td, 0, AT_FDCWD, uap->path, UIO_USERSPACE, &sb);
|
|
if (error != 0)
|
|
return (error);
|
|
error = freebsd11_cvtnstat(&sb, &nsb);
|
|
if (error == 0)
|
|
error = copyout(&nsb, uap->ub, sizeof (nsb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* NetBSD lstat. Get file status; this version does not follow links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct freebsd11_nlstat_args {
|
|
char *path;
|
|
struct nstat *ub;
|
|
};
|
|
#endif
|
|
int
|
|
freebsd11_nlstat(struct thread *td, struct freebsd11_nlstat_args *uap)
|
|
{
|
|
struct stat sb;
|
|
struct nstat nsb;
|
|
int error;
|
|
|
|
error = kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, uap->path,
|
|
UIO_USERSPACE, &sb);
|
|
if (error != 0)
|
|
return (error);
|
|
error = freebsd11_cvtnstat(&sb, &nsb);
|
|
if (error == 0)
|
|
error = copyout(&nsb, uap->ub, sizeof (nsb));
|
|
return (error);
|
|
}
|
|
#endif /* COMPAT_FREEBSD11 */
|
|
|
|
/*
|
|
* Get configurable pathname variables.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct pathconf_args {
|
|
char *path;
|
|
int name;
|
|
};
|
|
#endif
|
|
int
|
|
sys_pathconf(struct thread *td, struct pathconf_args *uap)
|
|
{
|
|
long value;
|
|
int error;
|
|
|
|
error = kern_pathconf(td, uap->path, UIO_USERSPACE, uap->name, FOLLOW,
|
|
&value);
|
|
if (error == 0)
|
|
td->td_retval[0] = value;
|
|
return (error);
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lpathconf_args {
|
|
char *path;
|
|
int name;
|
|
};
|
|
#endif
|
|
int
|
|
sys_lpathconf(struct thread *td, struct lpathconf_args *uap)
|
|
{
|
|
long value;
|
|
int error;
|
|
|
|
error = kern_pathconf(td, uap->path, UIO_USERSPACE, uap->name,
|
|
NOFOLLOW, &value);
|
|
if (error == 0)
|
|
td->td_retval[0] = value;
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_pathconf(struct thread *td, const char *path, enum uio_seg pathseg,
|
|
int name, u_long flags, long *valuep)
|
|
{
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
NDINIT(&nd, LOOKUP, LOCKSHARED | LOCKLEAF | AUDITVNODE1 | flags,
|
|
pathseg, path);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE_PNBUF(&nd);
|
|
|
|
error = VOP_PATHCONF(nd.ni_vp, name, valuep);
|
|
vput(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Return target name of a symbolic link.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct readlink_args {
|
|
char *path;
|
|
char *buf;
|
|
size_t count;
|
|
};
|
|
#endif
|
|
int
|
|
sys_readlink(struct thread *td, struct readlink_args *uap)
|
|
{
|
|
|
|
return (kern_readlinkat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->buf, UIO_USERSPACE, uap->count));
|
|
}
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct readlinkat_args {
|
|
int fd;
|
|
char *path;
|
|
char *buf;
|
|
size_t bufsize;
|
|
};
|
|
#endif
|
|
int
|
|
sys_readlinkat(struct thread *td, struct readlinkat_args *uap)
|
|
{
|
|
|
|
return (kern_readlinkat(td, uap->fd, uap->path, UIO_USERSPACE,
|
|
uap->buf, UIO_USERSPACE, uap->bufsize));
|
|
}
|
|
|
|
int
|
|
kern_readlinkat(struct thread *td, int fd, const char *path,
|
|
enum uio_seg pathseg, char *buf, enum uio_seg bufseg, size_t count)
|
|
{
|
|
struct vnode *vp;
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
if (count > IOSIZE_MAX)
|
|
return (EINVAL);
|
|
|
|
NDINIT_AT(&nd, LOOKUP, NOFOLLOW | LOCKSHARED | LOCKLEAF | AUDITVNODE1 |
|
|
EMPTYPATH, pathseg, path, fd);
|
|
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE_PNBUF(&nd);
|
|
vp = nd.ni_vp;
|
|
|
|
error = kern_readlink_vp(vp, buf, bufseg, count, td);
|
|
vput(vp);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Helper function to readlink from a vnode
|
|
*/
|
|
static int
|
|
kern_readlink_vp(struct vnode *vp, char *buf, enum uio_seg bufseg, size_t count,
|
|
struct thread *td)
|
|
{
|
|
struct iovec aiov;
|
|
struct uio auio;
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "kern_readlink_vp(): vp not locked");
|
|
#ifdef MAC
|
|
error = mac_vnode_check_readlink(td->td_ucred, vp);
|
|
if (error != 0)
|
|
return (error);
|
|
#endif
|
|
if (vp->v_type != VLNK && (vp->v_vflag & VV_READLINK) == 0)
|
|
return (EINVAL);
|
|
|
|
aiov.iov_base = buf;
|
|
aiov.iov_len = count;
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_offset = 0;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = bufseg;
|
|
auio.uio_td = td;
|
|
auio.uio_resid = count;
|
|
error = VOP_READLINK(vp, &auio, td->td_ucred);
|
|
td->td_retval[0] = count - auio.uio_resid;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common implementation code for chflags() and fchflags().
|
|
*/
|
|
static int
|
|
setfflags(struct thread *td, struct vnode *vp, u_long flags)
|
|
{
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
int error;
|
|
|
|
/* We can't support the value matching VNOVAL. */
|
|
if (flags == VNOVAL)
|
|
return (EOPNOTSUPP);
|
|
|
|
/*
|
|
* Prevent non-root users from setting flags on devices. When
|
|
* a device is reused, users can retain ownership of the device
|
|
* if they are allowed to set flags and programs assume that
|
|
* chown can't fail when done as root.
|
|
*/
|
|
if (vp->v_type == VCHR || vp->v_type == VBLK) {
|
|
error = priv_check(td, PRIV_VFS_CHFLAGS_DEV);
|
|
if (error != 0)
|
|
return (error);
|
|
}
|
|
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0)
|
|
return (error);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_flags = flags;
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
#ifdef MAC
|
|
error = mac_vnode_check_setflags(td->td_ucred, vp, vattr.va_flags);
|
|
if (error == 0)
|
|
#endif
|
|
error = VOP_SETATTR(vp, &vattr, td->td_ucred);
|
|
VOP_UNLOCK(vp);
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change flags of a file given a path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chflags_args {
|
|
const char *path;
|
|
u_long flags;
|
|
};
|
|
#endif
|
|
int
|
|
sys_chflags(struct thread *td, struct chflags_args *uap)
|
|
{
|
|
|
|
return (kern_chflagsat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->flags, 0));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chflagsat_args {
|
|
int fd;
|
|
const char *path;
|
|
u_long flags;
|
|
int atflag;
|
|
}
|
|
#endif
|
|
int
|
|
sys_chflagsat(struct thread *td, struct chflagsat_args *uap)
|
|
{
|
|
|
|
return (kern_chflagsat(td, uap->fd, uap->path, UIO_USERSPACE,
|
|
uap->flags, uap->atflag));
|
|
}
|
|
|
|
/*
|
|
* Same as chflags() but doesn't follow symlinks.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lchflags_args {
|
|
const char *path;
|
|
u_long flags;
|
|
};
|
|
#endif
|
|
int
|
|
sys_lchflags(struct thread *td, struct lchflags_args *uap)
|
|
{
|
|
|
|
return (kern_chflagsat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->flags, AT_SYMLINK_NOFOLLOW));
|
|
}
|
|
|
|
static int
|
|
kern_chflagsat(struct thread *td, int fd, const char *path,
|
|
enum uio_seg pathseg, u_long flags, int atflag)
|
|
{
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
if ((atflag & ~(AT_SYMLINK_NOFOLLOW | AT_RESOLVE_BENEATH |
|
|
AT_EMPTY_PATH)) != 0)
|
|
return (EINVAL);
|
|
|
|
AUDIT_ARG_FFLAGS(flags);
|
|
NDINIT_ATRIGHTS(&nd, LOOKUP, at2cnpflags(atflag, AT_SYMLINK_NOFOLLOW |
|
|
AT_RESOLVE_BENEATH | AT_EMPTY_PATH) | AUDITVNODE1, pathseg, path,
|
|
fd, &cap_fchflags_rights);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE_PNBUF(&nd);
|
|
error = setfflags(td, nd.ni_vp, flags);
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change flags of a file given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchflags_args {
|
|
int fd;
|
|
u_long flags;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fchflags(struct thread *td, struct fchflags_args *uap)
|
|
{
|
|
struct file *fp;
|
|
int error;
|
|
|
|
AUDIT_ARG_FD(uap->fd);
|
|
AUDIT_ARG_FFLAGS(uap->flags);
|
|
error = getvnode(td, uap->fd, &cap_fchflags_rights,
|
|
&fp);
|
|
if (error != 0)
|
|
return (error);
|
|
#ifdef AUDIT
|
|
if (AUDITING_TD(td)) {
|
|
vn_lock(fp->f_vnode, LK_SHARED | LK_RETRY);
|
|
AUDIT_ARG_VNODE1(fp->f_vnode);
|
|
VOP_UNLOCK(fp->f_vnode);
|
|
}
|
|
#endif
|
|
error = setfflags(td, fp->f_vnode, uap->flags);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common implementation code for chmod(), lchmod() and fchmod().
|
|
*/
|
|
int
|
|
setfmode(struct thread *td, struct ucred *cred, struct vnode *vp, int mode)
|
|
{
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
int error;
|
|
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0)
|
|
return (error);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = mode & ALLPERMS;
|
|
#ifdef MAC
|
|
error = mac_vnode_check_setmode(cred, vp, vattr.va_mode);
|
|
if (error == 0)
|
|
#endif
|
|
error = VOP_SETATTR(vp, &vattr, cred);
|
|
VOP_UNLOCK(vp);
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change mode of a file given path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chmod_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_chmod(struct thread *td, struct chmod_args *uap)
|
|
{
|
|
|
|
return (kern_fchmodat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->mode, 0));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchmodat_args {
|
|
int dirfd;
|
|
char *path;
|
|
mode_t mode;
|
|
int flag;
|
|
}
|
|
#endif
|
|
int
|
|
sys_fchmodat(struct thread *td, struct fchmodat_args *uap)
|
|
{
|
|
|
|
return (kern_fchmodat(td, uap->fd, uap->path, UIO_USERSPACE,
|
|
uap->mode, uap->flag));
|
|
}
|
|
|
|
/*
|
|
* Change mode of a file given path name (don't follow links.)
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lchmod_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_lchmod(struct thread *td, struct lchmod_args *uap)
|
|
{
|
|
|
|
return (kern_fchmodat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->mode, AT_SYMLINK_NOFOLLOW));
|
|
}
|
|
|
|
int
|
|
kern_fchmodat(struct thread *td, int fd, const char *path,
|
|
enum uio_seg pathseg, mode_t mode, int flag)
|
|
{
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
if ((flag & ~(AT_SYMLINK_NOFOLLOW | AT_RESOLVE_BENEATH |
|
|
AT_EMPTY_PATH)) != 0)
|
|
return (EINVAL);
|
|
|
|
AUDIT_ARG_MODE(mode);
|
|
NDINIT_ATRIGHTS(&nd, LOOKUP, at2cnpflags(flag, AT_SYMLINK_NOFOLLOW |
|
|
AT_RESOLVE_BENEATH | AT_EMPTY_PATH) | AUDITVNODE1, pathseg, path,
|
|
fd, &cap_fchmod_rights);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE_PNBUF(&nd);
|
|
error = setfmode(td, td->td_ucred, nd.ni_vp, mode);
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change mode of a file given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchmod_args {
|
|
int fd;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fchmod(struct thread *td, struct fchmod_args *uap)
|
|
{
|
|
struct file *fp;
|
|
int error;
|
|
|
|
AUDIT_ARG_FD(uap->fd);
|
|
AUDIT_ARG_MODE(uap->mode);
|
|
|
|
error = fget(td, uap->fd, &cap_fchmod_rights, &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
error = fo_chmod(fp, uap->mode, td->td_ucred, td);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common implementation for chown(), lchown(), and fchown()
|
|
*/
|
|
int
|
|
setfown(struct thread *td, struct ucred *cred, struct vnode *vp, uid_t uid,
|
|
gid_t gid)
|
|
{
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
int error;
|
|
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0)
|
|
return (error);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_uid = uid;
|
|
vattr.va_gid = gid;
|
|
#ifdef MAC
|
|
error = mac_vnode_check_setowner(cred, vp, vattr.va_uid,
|
|
vattr.va_gid);
|
|
if (error == 0)
|
|
#endif
|
|
error = VOP_SETATTR(vp, &vattr, cred);
|
|
VOP_UNLOCK(vp);
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chown_args {
|
|
char *path;
|
|
int uid;
|
|
int gid;
|
|
};
|
|
#endif
|
|
int
|
|
sys_chown(struct thread *td, struct chown_args *uap)
|
|
{
|
|
|
|
return (kern_fchownat(td, AT_FDCWD, uap->path, UIO_USERSPACE, uap->uid,
|
|
uap->gid, 0));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchownat_args {
|
|
int fd;
|
|
const char * path;
|
|
uid_t uid;
|
|
gid_t gid;
|
|
int flag;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fchownat(struct thread *td, struct fchownat_args *uap)
|
|
{
|
|
|
|
return (kern_fchownat(td, uap->fd, uap->path, UIO_USERSPACE, uap->uid,
|
|
uap->gid, uap->flag));
|
|
}
|
|
|
|
int
|
|
kern_fchownat(struct thread *td, int fd, const char *path,
|
|
enum uio_seg pathseg, int uid, int gid, int flag)
|
|
{
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
if ((flag & ~(AT_SYMLINK_NOFOLLOW | AT_RESOLVE_BENEATH |
|
|
AT_EMPTY_PATH)) != 0)
|
|
return (EINVAL);
|
|
|
|
AUDIT_ARG_OWNER(uid, gid);
|
|
NDINIT_ATRIGHTS(&nd, LOOKUP, at2cnpflags(flag, AT_SYMLINK_NOFOLLOW |
|
|
AT_RESOLVE_BENEATH | AT_EMPTY_PATH) | AUDITVNODE1, pathseg, path,
|
|
fd, &cap_fchown_rights);
|
|
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE_PNBUF(&nd);
|
|
error = setfown(td, td->td_ucred, nd.ni_vp, uid, gid);
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a path name, do not cross symlinks.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lchown_args {
|
|
char *path;
|
|
int uid;
|
|
int gid;
|
|
};
|
|
#endif
|
|
int
|
|
sys_lchown(struct thread *td, struct lchown_args *uap)
|
|
{
|
|
|
|
return (kern_fchownat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->uid, uap->gid, AT_SYMLINK_NOFOLLOW));
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchown_args {
|
|
int fd;
|
|
int uid;
|
|
int gid;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fchown(struct thread *td, struct fchown_args *uap)
|
|
{
|
|
struct file *fp;
|
|
int error;
|
|
|
|
AUDIT_ARG_FD(uap->fd);
|
|
AUDIT_ARG_OWNER(uap->uid, uap->gid);
|
|
error = fget(td, uap->fd, &cap_fchown_rights, &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
error = fo_chown(fp, uap->uid, uap->gid, td->td_ucred, td);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common implementation code for utimes(), lutimes(), and futimes().
|
|
*/
|
|
static int
|
|
getutimes(const struct timeval *usrtvp, enum uio_seg tvpseg,
|
|
struct timespec *tsp)
|
|
{
|
|
struct timeval tv[2];
|
|
const struct timeval *tvp;
|
|
int error;
|
|
|
|
if (usrtvp == NULL) {
|
|
vfs_timestamp(&tsp[0]);
|
|
tsp[1] = tsp[0];
|
|
} else {
|
|
if (tvpseg == UIO_SYSSPACE) {
|
|
tvp = usrtvp;
|
|
} else {
|
|
if ((error = copyin(usrtvp, tv, sizeof(tv))) != 0)
|
|
return (error);
|
|
tvp = tv;
|
|
}
|
|
|
|
if (tvp[0].tv_usec < 0 || tvp[0].tv_usec >= 1000000 ||
|
|
tvp[1].tv_usec < 0 || tvp[1].tv_usec >= 1000000)
|
|
return (EINVAL);
|
|
TIMEVAL_TO_TIMESPEC(&tvp[0], &tsp[0]);
|
|
TIMEVAL_TO_TIMESPEC(&tvp[1], &tsp[1]);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Common implementation code for futimens(), utimensat().
|
|
*/
|
|
#define UTIMENS_NULL 0x1
|
|
#define UTIMENS_EXIT 0x2
|
|
static int
|
|
getutimens(const struct timespec *usrtsp, enum uio_seg tspseg,
|
|
struct timespec *tsp, int *retflags)
|
|
{
|
|
struct timespec tsnow;
|
|
int error;
|
|
|
|
vfs_timestamp(&tsnow);
|
|
*retflags = 0;
|
|
if (usrtsp == NULL) {
|
|
tsp[0] = tsnow;
|
|
tsp[1] = tsnow;
|
|
*retflags |= UTIMENS_NULL;
|
|
return (0);
|
|
}
|
|
if (tspseg == UIO_SYSSPACE) {
|
|
tsp[0] = usrtsp[0];
|
|
tsp[1] = usrtsp[1];
|
|
} else if ((error = copyin(usrtsp, tsp, sizeof(*tsp) * 2)) != 0)
|
|
return (error);
|
|
if (tsp[0].tv_nsec == UTIME_OMIT && tsp[1].tv_nsec == UTIME_OMIT)
|
|
*retflags |= UTIMENS_EXIT;
|
|
if (tsp[0].tv_nsec == UTIME_NOW && tsp[1].tv_nsec == UTIME_NOW)
|
|
*retflags |= UTIMENS_NULL;
|
|
if (tsp[0].tv_nsec == UTIME_OMIT)
|
|
tsp[0].tv_sec = VNOVAL;
|
|
else if (tsp[0].tv_nsec == UTIME_NOW)
|
|
tsp[0] = tsnow;
|
|
else if (tsp[0].tv_nsec < 0 || tsp[0].tv_nsec >= 1000000000L)
|
|
return (EINVAL);
|
|
if (tsp[1].tv_nsec == UTIME_OMIT)
|
|
tsp[1].tv_sec = VNOVAL;
|
|
else if (tsp[1].tv_nsec == UTIME_NOW)
|
|
tsp[1] = tsnow;
|
|
else if (tsp[1].tv_nsec < 0 || tsp[1].tv_nsec >= 1000000000L)
|
|
return (EINVAL);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Common implementation code for utimes(), lutimes(), futimes(), futimens(),
|
|
* and utimensat().
|
|
*/
|
|
static int
|
|
setutimes(struct thread *td, struct vnode *vp, const struct timespec *ts,
|
|
int numtimes, int nullflag)
|
|
{
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
int error;
|
|
bool setbirthtime;
|
|
|
|
setbirthtime = false;
|
|
vattr.va_birthtime.tv_sec = VNOVAL;
|
|
vattr.va_birthtime.tv_nsec = 0;
|
|
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0)
|
|
return (error);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
if (numtimes < 3 && VOP_GETATTR(vp, &vattr, td->td_ucred) == 0 &&
|
|
timespeccmp(&ts[1], &vattr.va_birthtime, < ))
|
|
setbirthtime = true;
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_atime = ts[0];
|
|
vattr.va_mtime = ts[1];
|
|
if (setbirthtime)
|
|
vattr.va_birthtime = ts[1];
|
|
if (numtimes > 2)
|
|
vattr.va_birthtime = ts[2];
|
|
if (nullflag)
|
|
vattr.va_vaflags |= VA_UTIMES_NULL;
|
|
#ifdef MAC
|
|
error = mac_vnode_check_setutimes(td->td_ucred, vp, vattr.va_atime,
|
|
vattr.va_mtime);
|
|
#endif
|
|
if (error == 0)
|
|
error = VOP_SETATTR(vp, &vattr, td->td_ucred);
|
|
VOP_UNLOCK(vp);
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the access and modification times of a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct utimes_args {
|
|
char *path;
|
|
struct timeval *tptr;
|
|
};
|
|
#endif
|
|
int
|
|
sys_utimes(struct thread *td, struct utimes_args *uap)
|
|
{
|
|
|
|
return (kern_utimesat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->tptr, UIO_USERSPACE));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct futimesat_args {
|
|
int fd;
|
|
const char * path;
|
|
const struct timeval * times;
|
|
};
|
|
#endif
|
|
int
|
|
sys_futimesat(struct thread *td, struct futimesat_args *uap)
|
|
{
|
|
|
|
return (kern_utimesat(td, uap->fd, uap->path, UIO_USERSPACE,
|
|
uap->times, UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_utimesat(struct thread *td, int fd, const char *path,
|
|
enum uio_seg pathseg, const struct timeval *tptr, enum uio_seg tptrseg)
|
|
{
|
|
struct nameidata nd;
|
|
struct timespec ts[2];
|
|
int error;
|
|
|
|
if ((error = getutimes(tptr, tptrseg, ts)) != 0)
|
|
return (error);
|
|
NDINIT_ATRIGHTS(&nd, LOOKUP, FOLLOW | AUDITVNODE1, pathseg, path, fd,
|
|
&cap_futimes_rights);
|
|
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE_PNBUF(&nd);
|
|
error = setutimes(td, nd.ni_vp, ts, 2, tptr == NULL);
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the access and modification times of a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lutimes_args {
|
|
char *path;
|
|
struct timeval *tptr;
|
|
};
|
|
#endif
|
|
int
|
|
sys_lutimes(struct thread *td, struct lutimes_args *uap)
|
|
{
|
|
|
|
return (kern_lutimes(td, uap->path, UIO_USERSPACE, uap->tptr,
|
|
UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_lutimes(struct thread *td, const char *path, enum uio_seg pathseg,
|
|
const struct timeval *tptr, enum uio_seg tptrseg)
|
|
{
|
|
struct timespec ts[2];
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
if ((error = getutimes(tptr, tptrseg, ts)) != 0)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | AUDITVNODE1, pathseg, path);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE_PNBUF(&nd);
|
|
error = setutimes(td, nd.ni_vp, ts, 2, tptr == NULL);
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the access and modification times of a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct futimes_args {
|
|
int fd;
|
|
struct timeval *tptr;
|
|
};
|
|
#endif
|
|
int
|
|
sys_futimes(struct thread *td, struct futimes_args *uap)
|
|
{
|
|
|
|
return (kern_futimes(td, uap->fd, uap->tptr, UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_futimes(struct thread *td, int fd, const struct timeval *tptr,
|
|
enum uio_seg tptrseg)
|
|
{
|
|
struct timespec ts[2];
|
|
struct file *fp;
|
|
int error;
|
|
|
|
AUDIT_ARG_FD(fd);
|
|
error = getutimes(tptr, tptrseg, ts);
|
|
if (error != 0)
|
|
return (error);
|
|
error = getvnode(td, fd, &cap_futimes_rights, &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
#ifdef AUDIT
|
|
if (AUDITING_TD(td)) {
|
|
vn_lock(fp->f_vnode, LK_SHARED | LK_RETRY);
|
|
AUDIT_ARG_VNODE1(fp->f_vnode);
|
|
VOP_UNLOCK(fp->f_vnode);
|
|
}
|
|
#endif
|
|
error = setutimes(td, fp->f_vnode, ts, 2, tptr == NULL);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_futimens(struct thread *td, struct futimens_args *uap)
|
|
{
|
|
|
|
return (kern_futimens(td, uap->fd, uap->times, UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_futimens(struct thread *td, int fd, const struct timespec *tptr,
|
|
enum uio_seg tptrseg)
|
|
{
|
|
struct timespec ts[2];
|
|
struct file *fp;
|
|
int error, flags;
|
|
|
|
AUDIT_ARG_FD(fd);
|
|
error = getutimens(tptr, tptrseg, ts, &flags);
|
|
if (error != 0)
|
|
return (error);
|
|
if (flags & UTIMENS_EXIT)
|
|
return (0);
|
|
error = getvnode(td, fd, &cap_futimes_rights, &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
#ifdef AUDIT
|
|
if (AUDITING_TD(td)) {
|
|
vn_lock(fp->f_vnode, LK_SHARED | LK_RETRY);
|
|
AUDIT_ARG_VNODE1(fp->f_vnode);
|
|
VOP_UNLOCK(fp->f_vnode);
|
|
}
|
|
#endif
|
|
error = setutimes(td, fp->f_vnode, ts, 2, flags & UTIMENS_NULL);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_utimensat(struct thread *td, struct utimensat_args *uap)
|
|
{
|
|
|
|
return (kern_utimensat(td, uap->fd, uap->path, UIO_USERSPACE,
|
|
uap->times, UIO_USERSPACE, uap->flag));
|
|
}
|
|
|
|
int
|
|
kern_utimensat(struct thread *td, int fd, const char *path,
|
|
enum uio_seg pathseg, const struct timespec *tptr, enum uio_seg tptrseg,
|
|
int flag)
|
|
{
|
|
struct nameidata nd;
|
|
struct timespec ts[2];
|
|
int error, flags;
|
|
|
|
if ((flag & ~(AT_SYMLINK_NOFOLLOW | AT_RESOLVE_BENEATH |
|
|
AT_EMPTY_PATH)) != 0)
|
|
return (EINVAL);
|
|
|
|
if ((error = getutimens(tptr, tptrseg, ts, &flags)) != 0)
|
|
return (error);
|
|
NDINIT_ATRIGHTS(&nd, LOOKUP, at2cnpflags(flag, AT_SYMLINK_NOFOLLOW |
|
|
AT_RESOLVE_BENEATH | AT_EMPTY_PATH) | AUDITVNODE1,
|
|
pathseg, path, fd, &cap_futimes_rights);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
/*
|
|
* We are allowed to call namei() regardless of 2xUTIME_OMIT.
|
|
* POSIX states:
|
|
* "If both tv_nsec fields are UTIME_OMIT... EACCESS may be detected."
|
|
* "Search permission is denied by a component of the path prefix."
|
|
*/
|
|
NDFREE_PNBUF(&nd);
|
|
if ((flags & UTIMENS_EXIT) == 0)
|
|
error = setutimes(td, nd.ni_vp, ts, 2, flags & UTIMENS_NULL);
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Truncate a file given its path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct truncate_args {
|
|
char *path;
|
|
int pad;
|
|
off_t length;
|
|
};
|
|
#endif
|
|
int
|
|
sys_truncate(struct thread *td, struct truncate_args *uap)
|
|
{
|
|
|
|
return (kern_truncate(td, uap->path, UIO_USERSPACE, uap->length));
|
|
}
|
|
|
|
int
|
|
kern_truncate(struct thread *td, const char *path, enum uio_seg pathseg,
|
|
off_t length)
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
void *rl_cookie;
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
if (length < 0)
|
|
return (EINVAL);
|
|
NDPREINIT(&nd);
|
|
retry:
|
|
NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNODE1, pathseg, path);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
NDFREE_PNBUF(&nd);
|
|
rl_cookie = vn_rangelock_wlock(vp, 0, OFF_MAX);
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) {
|
|
vn_rangelock_unlock(vp, rl_cookie);
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
if (vp->v_type == VDIR) {
|
|
error = EISDIR;
|
|
goto out;
|
|
}
|
|
#ifdef MAC
|
|
error = mac_vnode_check_write(td->td_ucred, NOCRED, vp);
|
|
if (error != 0)
|
|
goto out;
|
|
#endif
|
|
error = VOP_ACCESS(vp, VWRITE, td->td_ucred, td);
|
|
if (error != 0)
|
|
goto out;
|
|
|
|
error = vn_truncate_locked(vp, length, false, td->td_ucred);
|
|
out:
|
|
VOP_UNLOCK(vp);
|
|
vn_finished_write(mp);
|
|
vn_rangelock_unlock(vp, rl_cookie);
|
|
vrele(vp);
|
|
if (error == ERELOOKUP)
|
|
goto retry;
|
|
return (error);
|
|
}
|
|
|
|
#if defined(COMPAT_43)
|
|
/*
|
|
* Truncate a file given its path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct otruncate_args {
|
|
char *path;
|
|
long length;
|
|
};
|
|
#endif
|
|
int
|
|
otruncate(struct thread *td, struct otruncate_args *uap)
|
|
{
|
|
|
|
return (kern_truncate(td, uap->path, UIO_USERSPACE, uap->length));
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
#if defined(COMPAT_FREEBSD6)
|
|
/* Versions with the pad argument */
|
|
int
|
|
freebsd6_truncate(struct thread *td, struct freebsd6_truncate_args *uap)
|
|
{
|
|
|
|
return (kern_truncate(td, uap->path, UIO_USERSPACE, uap->length));
|
|
}
|
|
|
|
int
|
|
freebsd6_ftruncate(struct thread *td, struct freebsd6_ftruncate_args *uap)
|
|
{
|
|
|
|
return (kern_ftruncate(td, uap->fd, uap->length));
|
|
}
|
|
#endif
|
|
|
|
int
|
|
kern_fsync(struct thread *td, int fd, bool fullsync)
|
|
{
|
|
struct vnode *vp;
|
|
struct mount *mp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
AUDIT_ARG_FD(fd);
|
|
error = getvnode(td, fd, &cap_fsync_rights, &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
vp = fp->f_vnode;
|
|
#if 0
|
|
if (!fullsync)
|
|
/* XXXKIB: compete outstanding aio writes */;
|
|
#endif
|
|
retry:
|
|
error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH);
|
|
if (error != 0)
|
|
goto drop;
|
|
vn_lock(vp, vn_lktype_write(mp, vp) | LK_RETRY);
|
|
AUDIT_ARG_VNODE1(vp);
|
|
if (vp->v_object != NULL) {
|
|
VM_OBJECT_WLOCK(vp->v_object);
|
|
vm_object_page_clean(vp->v_object, 0, 0, 0);
|
|
VM_OBJECT_WUNLOCK(vp->v_object);
|
|
}
|
|
error = fullsync ? VOP_FSYNC(vp, MNT_WAIT, td) : VOP_FDATASYNC(vp, td);
|
|
VOP_UNLOCK(vp);
|
|
vn_finished_write(mp);
|
|
if (error == ERELOOKUP)
|
|
goto retry;
|
|
drop:
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Sync an open file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fsync_args {
|
|
int fd;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fsync(struct thread *td, struct fsync_args *uap)
|
|
{
|
|
|
|
return (kern_fsync(td, uap->fd, true));
|
|
}
|
|
|
|
int
|
|
sys_fdatasync(struct thread *td, struct fdatasync_args *uap)
|
|
{
|
|
|
|
return (kern_fsync(td, uap->fd, false));
|
|
}
|
|
|
|
/*
|
|
* Rename files. Source and destination must either both be directories, or
|
|
* both not be directories. If target is a directory, it must be empty.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct rename_args {
|
|
char *from;
|
|
char *to;
|
|
};
|
|
#endif
|
|
int
|
|
sys_rename(struct thread *td, struct rename_args *uap)
|
|
{
|
|
|
|
return (kern_renameat(td, AT_FDCWD, uap->from, AT_FDCWD,
|
|
uap->to, UIO_USERSPACE));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct renameat_args {
|
|
int oldfd;
|
|
char *old;
|
|
int newfd;
|
|
char *new;
|
|
};
|
|
#endif
|
|
int
|
|
sys_renameat(struct thread *td, struct renameat_args *uap)
|
|
{
|
|
|
|
return (kern_renameat(td, uap->oldfd, uap->old, uap->newfd, uap->new,
|
|
UIO_USERSPACE));
|
|
}
|
|
|
|
#ifdef MAC
|
|
static int
|
|
kern_renameat_mac(struct thread *td, int oldfd, const char *old, int newfd,
|
|
const char *new, enum uio_seg pathseg, struct nameidata *fromnd)
|
|
{
|
|
int error;
|
|
|
|
NDINIT_ATRIGHTS(fromnd, DELETE, LOCKPARENT | LOCKLEAF | AUDITVNODE1,
|
|
pathseg, old, oldfd, &cap_renameat_source_rights);
|
|
if ((error = namei(fromnd)) != 0)
|
|
return (error);
|
|
error = mac_vnode_check_rename_from(td->td_ucred, fromnd->ni_dvp,
|
|
fromnd->ni_vp, &fromnd->ni_cnd);
|
|
VOP_UNLOCK(fromnd->ni_dvp);
|
|
if (fromnd->ni_dvp != fromnd->ni_vp)
|
|
VOP_UNLOCK(fromnd->ni_vp);
|
|
if (error != 0) {
|
|
NDFREE_PNBUF(fromnd);
|
|
vrele(fromnd->ni_dvp);
|
|
vrele(fromnd->ni_vp);
|
|
}
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
int
|
|
kern_renameat(struct thread *td, int oldfd, const char *old, int newfd,
|
|
const char *new, enum uio_seg pathseg)
|
|
{
|
|
struct mount *mp = NULL;
|
|
struct vnode *tvp, *fvp, *tdvp;
|
|
struct nameidata fromnd, tond;
|
|
uint64_t tondflags;
|
|
int error;
|
|
|
|
again:
|
|
bwillwrite();
|
|
#ifdef MAC
|
|
if (mac_vnode_check_rename_from_enabled()) {
|
|
error = kern_renameat_mac(td, oldfd, old, newfd, new, pathseg,
|
|
&fromnd);
|
|
if (error != 0)
|
|
return (error);
|
|
} else {
|
|
#endif
|
|
NDINIT_ATRIGHTS(&fromnd, DELETE, WANTPARENT | AUDITVNODE1,
|
|
pathseg, old, oldfd, &cap_renameat_source_rights);
|
|
if ((error = namei(&fromnd)) != 0)
|
|
return (error);
|
|
#ifdef MAC
|
|
}
|
|
#endif
|
|
fvp = fromnd.ni_vp;
|
|
tondflags = LOCKPARENT | LOCKLEAF | NOCACHE | AUDITVNODE2;
|
|
if (fromnd.ni_vp->v_type == VDIR)
|
|
tondflags |= WILLBEDIR;
|
|
NDINIT_ATRIGHTS(&tond, RENAME, tondflags, pathseg, new, newfd,
|
|
&cap_renameat_target_rights);
|
|
if ((error = namei(&tond)) != 0) {
|
|
/* Translate error code for rename("dir1", "dir2/."). */
|
|
if (error == EISDIR && fvp->v_type == VDIR)
|
|
error = EINVAL;
|
|
NDFREE_PNBUF(&fromnd);
|
|
vrele(fromnd.ni_dvp);
|
|
vrele(fvp);
|
|
goto out1;
|
|
}
|
|
tdvp = tond.ni_dvp;
|
|
tvp = tond.ni_vp;
|
|
error = vn_start_write(fvp, &mp, V_NOWAIT);
|
|
if (error != 0) {
|
|
NDFREE_PNBUF(&fromnd);
|
|
NDFREE_PNBUF(&tond);
|
|
if (tvp != NULL)
|
|
vput(tvp);
|
|
if (tdvp == tvp)
|
|
vrele(tdvp);
|
|
else
|
|
vput(tdvp);
|
|
vrele(fromnd.ni_dvp);
|
|
vrele(fvp);
|
|
error = vn_start_write(NULL, &mp, V_XSLEEP | V_PCATCH);
|
|
if (error != 0)
|
|
return (error);
|
|
goto again;
|
|
}
|
|
if (tvp != NULL) {
|
|
if (fvp->v_type == VDIR && tvp->v_type != VDIR) {
|
|
error = ENOTDIR;
|
|
goto out;
|
|
} else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {
|
|
error = EISDIR;
|
|
goto out;
|
|
}
|
|
#ifdef CAPABILITIES
|
|
if (newfd != AT_FDCWD && (tond.ni_resflags & NIRES_ABS) == 0) {
|
|
/*
|
|
* If the target already exists we require CAP_UNLINKAT
|
|
* from 'newfd', when newfd was used for the lookup.
|
|
*/
|
|
error = cap_check(&tond.ni_filecaps.fc_rights,
|
|
&cap_unlinkat_rights);
|
|
if (error != 0)
|
|
goto out;
|
|
}
|
|
#endif
|
|
}
|
|
if (fvp == tdvp) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
/*
|
|
* If the source is the same as the destination (that is, if they
|
|
* are links to the same vnode), then there is nothing to do.
|
|
*/
|
|
if (fvp == tvp)
|
|
error = ERESTART;
|
|
#ifdef MAC
|
|
else
|
|
error = mac_vnode_check_rename_to(td->td_ucred, tdvp,
|
|
tond.ni_vp, fromnd.ni_dvp == tdvp, &tond.ni_cnd);
|
|
#endif
|
|
out:
|
|
if (error == 0) {
|
|
error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd,
|
|
tond.ni_dvp, tond.ni_vp, &tond.ni_cnd);
|
|
NDFREE_PNBUF(&fromnd);
|
|
NDFREE_PNBUF(&tond);
|
|
} else {
|
|
NDFREE_PNBUF(&fromnd);
|
|
NDFREE_PNBUF(&tond);
|
|
if (tvp != NULL)
|
|
vput(tvp);
|
|
if (tdvp == tvp)
|
|
vrele(tdvp);
|
|
else
|
|
vput(tdvp);
|
|
vrele(fromnd.ni_dvp);
|
|
vrele(fvp);
|
|
}
|
|
vn_finished_write(mp);
|
|
out1:
|
|
if (error == ERESTART)
|
|
return (0);
|
|
if (error == ERELOOKUP)
|
|
goto again;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a directory file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mkdir_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_mkdir(struct thread *td, struct mkdir_args *uap)
|
|
{
|
|
|
|
return (kern_mkdirat(td, AT_FDCWD, uap->path, UIO_USERSPACE,
|
|
uap->mode));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mkdirat_args {
|
|
int fd;
|
|
char *path;
|
|
mode_t mode;
|
|
};
|
|
#endif
|
|
int
|
|
sys_mkdirat(struct thread *td, struct mkdirat_args *uap)
|
|
{
|
|
|
|
return (kern_mkdirat(td, uap->fd, uap->path, UIO_USERSPACE, uap->mode));
|
|
}
|
|
|
|
int
|
|
kern_mkdirat(struct thread *td, int fd, const char *path, enum uio_seg segflg,
|
|
int mode)
|
|
{
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
AUDIT_ARG_MODE(mode);
|
|
NDPREINIT(&nd);
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT_ATRIGHTS(&nd, CREATE, LOCKPARENT | AUDITVNODE1 |
|
|
NC_NOMAKEENTRY | NC_KEEPPOSENTRY | FAILIFEXISTS | WILLBEDIR,
|
|
segflg, path, fd, &cap_mkdirat_rights);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE_PNBUF(&nd);
|
|
vput(nd.ni_dvp);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | V_PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_type = VDIR;
|
|
vattr.va_mode = (mode & ACCESSPERMS) &~ td->td_proc->p_pd->pd_cmask;
|
|
#ifdef MAC
|
|
error = mac_vnode_check_create(td->td_ucred, nd.ni_dvp, &nd.ni_cnd,
|
|
&vattr);
|
|
if (error != 0)
|
|
goto out;
|
|
#endif
|
|
error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
|
|
#ifdef MAC
|
|
out:
|
|
#endif
|
|
NDFREE_PNBUF(&nd);
|
|
VOP_VPUT_PAIR(nd.ni_dvp, error == 0 ? &nd.ni_vp : NULL, true);
|
|
vn_finished_write(mp);
|
|
if (error == ERELOOKUP)
|
|
goto restart;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Remove a directory file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct rmdir_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
int
|
|
sys_rmdir(struct thread *td, struct rmdir_args *uap)
|
|
{
|
|
|
|
return (kern_frmdirat(td, AT_FDCWD, uap->path, FD_NONE, UIO_USERSPACE,
|
|
0));
|
|
}
|
|
|
|
int
|
|
kern_frmdirat(struct thread *td, int dfd, const char *path, int fd,
|
|
enum uio_seg pathseg, int flag)
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
struct nameidata nd;
|
|
cap_rights_t rights;
|
|
int error;
|
|
|
|
fp = NULL;
|
|
if (fd != FD_NONE) {
|
|
error = getvnode(td, fd, cap_rights_init_one(&rights,
|
|
CAP_LOOKUP), &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
}
|
|
|
|
NDPREINIT(&nd);
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT_ATRIGHTS(&nd, DELETE, LOCKPARENT | LOCKLEAF | AUDITVNODE1 |
|
|
at2cnpflags(flag, AT_RESOLVE_BENEATH),
|
|
pathseg, path, dfd, &cap_unlinkat_rights);
|
|
if ((error = namei(&nd)) != 0)
|
|
goto fdout;
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type != VDIR) {
|
|
error = ENOTDIR;
|
|
goto out;
|
|
}
|
|
/*
|
|
* No rmdir "." please.
|
|
*/
|
|
if (nd.ni_dvp == vp) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
/*
|
|
* The root of a mounted filesystem cannot be deleted.
|
|
*/
|
|
if (vp->v_vflag & VV_ROOT) {
|
|
error = EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
if (fp != NULL && fp->f_vnode != vp) {
|
|
if (VN_IS_DOOMED(fp->f_vnode))
|
|
error = EBADF;
|
|
else
|
|
error = EDEADLK;
|
|
goto out;
|
|
}
|
|
|
|
#ifdef MAC
|
|
error = mac_vnode_check_unlink(td->td_ucred, nd.ni_dvp, vp,
|
|
&nd.ni_cnd);
|
|
if (error != 0)
|
|
goto out;
|
|
#endif
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE_PNBUF(&nd);
|
|
vput(vp);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | V_PCATCH)) != 0)
|
|
goto fdout;
|
|
goto restart;
|
|
}
|
|
vfs_notify_upper(vp, VFS_NOTIFY_UPPER_UNLINK);
|
|
error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
|
|
vn_finished_write(mp);
|
|
out:
|
|
NDFREE_PNBUF(&nd);
|
|
vput(vp);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
if (error == ERELOOKUP)
|
|
goto restart;
|
|
fdout:
|
|
if (fp != NULL)
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
#if defined(COMPAT_43) || defined(COMPAT_FREEBSD11)
|
|
int
|
|
freebsd11_kern_getdirentries(struct thread *td, int fd, char *ubuf, u_int count,
|
|
long *basep, void (*func)(struct freebsd11_dirent *))
|
|
{
|
|
struct freebsd11_dirent dstdp;
|
|
struct dirent *dp, *edp;
|
|
char *dirbuf;
|
|
off_t base;
|
|
ssize_t resid, ucount;
|
|
int error;
|
|
|
|
/* XXX arbitrary sanity limit on `count'. */
|
|
count = min(count, 64 * 1024);
|
|
|
|
dirbuf = malloc(count, M_TEMP, M_WAITOK);
|
|
|
|
error = kern_getdirentries(td, fd, dirbuf, count, &base, &resid,
|
|
UIO_SYSSPACE);
|
|
if (error != 0)
|
|
goto done;
|
|
if (basep != NULL)
|
|
*basep = base;
|
|
|
|
ucount = 0;
|
|
for (dp = (struct dirent *)dirbuf,
|
|
edp = (struct dirent *)&dirbuf[count - resid];
|
|
ucount < count && dp < edp; ) {
|
|
if (dp->d_reclen == 0)
|
|
break;
|
|
MPASS(dp->d_reclen >= _GENERIC_DIRLEN(0));
|
|
if (dp->d_namlen >= sizeof(dstdp.d_name))
|
|
continue;
|
|
dstdp.d_type = dp->d_type;
|
|
dstdp.d_namlen = dp->d_namlen;
|
|
dstdp.d_fileno = dp->d_fileno; /* truncate */
|
|
if (dstdp.d_fileno != dp->d_fileno) {
|
|
switch (ino64_trunc_error) {
|
|
default:
|
|
case 0:
|
|
break;
|
|
case 1:
|
|
error = EOVERFLOW;
|
|
goto done;
|
|
case 2:
|
|
dstdp.d_fileno = UINT32_MAX;
|
|
break;
|
|
}
|
|
}
|
|
dstdp.d_reclen = sizeof(dstdp) - sizeof(dstdp.d_name) +
|
|
((dp->d_namlen + 1 + 3) &~ 3);
|
|
bcopy(dp->d_name, dstdp.d_name, dstdp.d_namlen);
|
|
bzero(dstdp.d_name + dstdp.d_namlen,
|
|
dstdp.d_reclen - offsetof(struct freebsd11_dirent, d_name) -
|
|
dstdp.d_namlen);
|
|
MPASS(dstdp.d_reclen <= dp->d_reclen);
|
|
MPASS(ucount + dstdp.d_reclen <= count);
|
|
if (func != NULL)
|
|
func(&dstdp);
|
|
error = copyout(&dstdp, ubuf + ucount, dstdp.d_reclen);
|
|
if (error != 0)
|
|
break;
|
|
dp = (struct dirent *)((char *)dp + dp->d_reclen);
|
|
ucount += dstdp.d_reclen;
|
|
}
|
|
|
|
done:
|
|
free(dirbuf, M_TEMP);
|
|
if (error == 0)
|
|
td->td_retval[0] = ucount;
|
|
return (error);
|
|
}
|
|
#endif /* COMPAT */
|
|
|
|
#ifdef COMPAT_43
|
|
static void
|
|
ogetdirentries_cvt(struct freebsd11_dirent *dp)
|
|
{
|
|
#if (BYTE_ORDER == LITTLE_ENDIAN)
|
|
/*
|
|
* The expected low byte of dp->d_namlen is our dp->d_type.
|
|
* The high MBZ byte of dp->d_namlen is our dp->d_namlen.
|
|
*/
|
|
dp->d_type = dp->d_namlen;
|
|
dp->d_namlen = 0;
|
|
#else
|
|
/*
|
|
* The dp->d_type is the high byte of the expected dp->d_namlen,
|
|
* so must be zero'ed.
|
|
*/
|
|
dp->d_type = 0;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Read a block of directory entries in a filesystem independent format.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ogetdirentries_args {
|
|
int fd;
|
|
char *buf;
|
|
u_int count;
|
|
long *basep;
|
|
};
|
|
#endif
|
|
int
|
|
ogetdirentries(struct thread *td, struct ogetdirentries_args *uap)
|
|
{
|
|
long loff;
|
|
int error;
|
|
|
|
error = kern_ogetdirentries(td, uap, &loff);
|
|
if (error == 0)
|
|
error = copyout(&loff, uap->basep, sizeof(long));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_ogetdirentries(struct thread *td, struct ogetdirentries_args *uap,
|
|
long *ploff)
|
|
{
|
|
long base;
|
|
int error;
|
|
|
|
/* XXX arbitrary sanity limit on `count'. */
|
|
if (uap->count > 64 * 1024)
|
|
return (EINVAL);
|
|
|
|
error = freebsd11_kern_getdirentries(td, uap->fd, uap->buf, uap->count,
|
|
&base, ogetdirentries_cvt);
|
|
|
|
if (error == 0 && uap->basep != NULL)
|
|
error = copyout(&base, uap->basep, sizeof(long));
|
|
|
|
return (error);
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
#if defined(COMPAT_FREEBSD11)
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct freebsd11_getdirentries_args {
|
|
int fd;
|
|
char *buf;
|
|
u_int count;
|
|
long *basep;
|
|
};
|
|
#endif
|
|
int
|
|
freebsd11_getdirentries(struct thread *td,
|
|
struct freebsd11_getdirentries_args *uap)
|
|
{
|
|
long base;
|
|
int error;
|
|
|
|
error = freebsd11_kern_getdirentries(td, uap->fd, uap->buf, uap->count,
|
|
&base, NULL);
|
|
|
|
if (error == 0 && uap->basep != NULL)
|
|
error = copyout(&base, uap->basep, sizeof(long));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
freebsd11_getdents(struct thread *td, struct freebsd11_getdents_args *uap)
|
|
{
|
|
struct freebsd11_getdirentries_args ap;
|
|
|
|
ap.fd = uap->fd;
|
|
ap.buf = uap->buf;
|
|
ap.count = uap->count;
|
|
ap.basep = NULL;
|
|
return (freebsd11_getdirentries(td, &ap));
|
|
}
|
|
#endif /* COMPAT_FREEBSD11 */
|
|
|
|
/*
|
|
* Read a block of directory entries in a filesystem independent format.
|
|
*/
|
|
int
|
|
sys_getdirentries(struct thread *td, struct getdirentries_args *uap)
|
|
{
|
|
off_t base;
|
|
int error;
|
|
|
|
error = kern_getdirentries(td, uap->fd, uap->buf, uap->count, &base,
|
|
NULL, UIO_USERSPACE);
|
|
if (error != 0)
|
|
return (error);
|
|
if (uap->basep != NULL)
|
|
error = copyout(&base, uap->basep, sizeof(off_t));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_getdirentries(struct thread *td, int fd, char *buf, size_t count,
|
|
off_t *basep, ssize_t *residp, enum uio_seg bufseg)
|
|
{
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
struct uio auio;
|
|
struct iovec aiov;
|
|
off_t loff;
|
|
int error, eofflag;
|
|
off_t foffset;
|
|
|
|
AUDIT_ARG_FD(fd);
|
|
if (count > IOSIZE_MAX)
|
|
return (EINVAL);
|
|
auio.uio_resid = count;
|
|
error = getvnode(td, fd, &cap_read_rights, &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
if ((fp->f_flag & FREAD) == 0) {
|
|
fdrop(fp, td);
|
|
return (EBADF);
|
|
}
|
|
vp = fp->f_vnode;
|
|
foffset = foffset_lock(fp, 0);
|
|
unionread:
|
|
if (vp->v_type != VDIR) {
|
|
error = EINVAL;
|
|
goto fail;
|
|
}
|
|
if (__predict_false((vp->v_vflag & VV_UNLINKED) != 0)) {
|
|
error = ENOENT;
|
|
goto fail;
|
|
}
|
|
aiov.iov_base = buf;
|
|
aiov.iov_len = count;
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = bufseg;
|
|
auio.uio_td = td;
|
|
vn_lock(vp, LK_SHARED | LK_RETRY);
|
|
AUDIT_ARG_VNODE1(vp);
|
|
loff = auio.uio_offset = foffset;
|
|
#ifdef MAC
|
|
error = mac_vnode_check_readdir(td->td_ucred, vp);
|
|
if (error == 0)
|
|
#endif
|
|
error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, NULL,
|
|
NULL);
|
|
foffset = auio.uio_offset;
|
|
if (error != 0) {
|
|
VOP_UNLOCK(vp);
|
|
goto fail;
|
|
}
|
|
if (count == auio.uio_resid &&
|
|
(vp->v_vflag & VV_ROOT) &&
|
|
(vp->v_mount->mnt_flag & MNT_UNION)) {
|
|
struct vnode *tvp = vp;
|
|
|
|
vp = vp->v_mount->mnt_vnodecovered;
|
|
VREF(vp);
|
|
fp->f_vnode = vp;
|
|
foffset = 0;
|
|
vput(tvp);
|
|
goto unionread;
|
|
}
|
|
VOP_UNLOCK(vp);
|
|
*basep = loff;
|
|
if (residp != NULL)
|
|
*residp = auio.uio_resid;
|
|
td->td_retval[0] = count - auio.uio_resid;
|
|
fail:
|
|
foffset_unlock(fp, foffset, 0);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the mode mask for creation of filesystem nodes.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct umask_args {
|
|
int newmask;
|
|
};
|
|
#endif
|
|
int
|
|
sys_umask(struct thread *td, struct umask_args *uap)
|
|
{
|
|
struct pwddesc *pdp;
|
|
|
|
pdp = td->td_proc->p_pd;
|
|
PWDDESC_XLOCK(pdp);
|
|
td->td_retval[0] = pdp->pd_cmask;
|
|
pdp->pd_cmask = uap->newmask & ALLPERMS;
|
|
PWDDESC_XUNLOCK(pdp);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Void all references to file by ripping underlying filesystem away from
|
|
* vnode.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct revoke_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
int
|
|
sys_revoke(struct thread *td, struct revoke_args *uap)
|
|
{
|
|
struct vnode *vp;
|
|
struct vattr vattr;
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | AUDITVNODE1, UIO_USERSPACE,
|
|
uap->path);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
NDFREE_PNBUF(&nd);
|
|
if (vp->v_type != VCHR || vp->v_rdev == NULL) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
#ifdef MAC
|
|
error = mac_vnode_check_revoke(td->td_ucred, vp);
|
|
if (error != 0)
|
|
goto out;
|
|
#endif
|
|
error = VOP_GETATTR(vp, &vattr, td->td_ucred);
|
|
if (error != 0)
|
|
goto out;
|
|
if (td->td_ucred->cr_uid != vattr.va_uid) {
|
|
error = priv_check(td, PRIV_VFS_ADMIN);
|
|
if (error != 0)
|
|
goto out;
|
|
}
|
|
if (devfs_usecount(vp) > 0)
|
|
VOP_REVOKE(vp, REVOKEALL);
|
|
out:
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* This variant of getvnode() allows O_PATH files. Caller should
|
|
* ensure that returned file and vnode are only used for compatible
|
|
* semantics.
|
|
*/
|
|
int
|
|
getvnode_path(struct thread *td, int fd, cap_rights_t *rightsp,
|
|
struct file **fpp)
|
|
{
|
|
struct file *fp;
|
|
int error;
|
|
|
|
error = fget_unlocked(td, fd, rightsp, &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
/*
|
|
* The file could be not of the vnode type, or it may be not
|
|
* yet fully initialized, in which case the f_vnode pointer
|
|
* may be set, but f_ops is still badfileops. E.g.,
|
|
* devfs_open() transiently create such situation to
|
|
* facilitate csw d_fdopen().
|
|
*
|
|
* Dupfdopen() handling in kern_openat() installs the
|
|
* half-baked file into the process descriptor table, allowing
|
|
* other thread to dereference it. Guard against the race by
|
|
* checking f_ops.
|
|
*/
|
|
if (__predict_false(fp->f_vnode == NULL || fp->f_ops == &badfileops)) {
|
|
fdrop(fp, td);
|
|
*fpp = NULL;
|
|
return (EINVAL);
|
|
}
|
|
|
|
*fpp = fp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Convert a user file descriptor to a kernel file entry and check
|
|
* that, if it is a capability, the correct rights are present.
|
|
* A reference on the file entry is held upon returning.
|
|
*/
|
|
int
|
|
getvnode(struct thread *td, int fd, cap_rights_t *rightsp, struct file **fpp)
|
|
{
|
|
int error;
|
|
|
|
error = getvnode_path(td, fd, rightsp, fpp);
|
|
if (__predict_false(error != 0))
|
|
return (error);
|
|
|
|
/*
|
|
* Filter out O_PATH file descriptors, most getvnode() callers
|
|
* do not call fo_ methods.
|
|
*/
|
|
if (__predict_false((*fpp)->f_ops == &path_fileops)) {
|
|
fdrop(*fpp, td);
|
|
*fpp = NULL;
|
|
error = EBADF;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get an (NFS) file handle.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lgetfh_args {
|
|
char *fname;
|
|
fhandle_t *fhp;
|
|
};
|
|
#endif
|
|
int
|
|
sys_lgetfh(struct thread *td, struct lgetfh_args *uap)
|
|
{
|
|
|
|
return (kern_getfhat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, uap->fname,
|
|
UIO_USERSPACE, uap->fhp, UIO_USERSPACE));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct getfh_args {
|
|
char *fname;
|
|
fhandle_t *fhp;
|
|
};
|
|
#endif
|
|
int
|
|
sys_getfh(struct thread *td, struct getfh_args *uap)
|
|
{
|
|
|
|
return (kern_getfhat(td, 0, AT_FDCWD, uap->fname, UIO_USERSPACE,
|
|
uap->fhp, UIO_USERSPACE));
|
|
}
|
|
|
|
/*
|
|
* syscall for the rpc.lockd to use to translate an open descriptor into
|
|
* a NFS file handle.
|
|
*
|
|
* warning: do not remove the priv_check() call or this becomes one giant
|
|
* security hole.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct getfhat_args {
|
|
int fd;
|
|
char *path;
|
|
fhandle_t *fhp;
|
|
int flags;
|
|
};
|
|
#endif
|
|
int
|
|
sys_getfhat(struct thread *td, struct getfhat_args *uap)
|
|
{
|
|
|
|
return (kern_getfhat(td, uap->flags, uap->fd, uap->path, UIO_USERSPACE,
|
|
uap->fhp, UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_getfhat(struct thread *td, int flags, int fd, const char *path,
|
|
enum uio_seg pathseg, fhandle_t *fhp, enum uio_seg fhseg)
|
|
{
|
|
struct nameidata nd;
|
|
fhandle_t fh;
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
if ((flags & ~(AT_SYMLINK_NOFOLLOW | AT_RESOLVE_BENEATH)) != 0)
|
|
return (EINVAL);
|
|
error = priv_check(td, PRIV_VFS_GETFH);
|
|
if (error != 0)
|
|
return (error);
|
|
NDINIT_AT(&nd, LOOKUP, at2cnpflags(flags, AT_SYMLINK_NOFOLLOW |
|
|
AT_RESOLVE_BENEATH) | LOCKLEAF | AUDITVNODE1, pathseg, path,
|
|
fd);
|
|
error = namei(&nd);
|
|
if (error != 0)
|
|
return (error);
|
|
NDFREE_PNBUF(&nd);
|
|
vp = nd.ni_vp;
|
|
bzero(&fh, sizeof(fh));
|
|
fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid;
|
|
error = VOP_VPTOFH(vp, &fh.fh_fid);
|
|
vput(vp);
|
|
if (error == 0) {
|
|
if (fhseg == UIO_USERSPACE)
|
|
error = copyout(&fh, fhp, sizeof (fh));
|
|
else
|
|
memcpy(fhp, &fh, sizeof(fh));
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fhlink_args {
|
|
fhandle_t *fhp;
|
|
const char *to;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fhlink(struct thread *td, struct fhlink_args *uap)
|
|
{
|
|
|
|
return (kern_fhlinkat(td, AT_FDCWD, uap->to, UIO_USERSPACE, uap->fhp));
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fhlinkat_args {
|
|
fhandle_t *fhp;
|
|
int tofd;
|
|
const char *to;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fhlinkat(struct thread *td, struct fhlinkat_args *uap)
|
|
{
|
|
|
|
return (kern_fhlinkat(td, uap->tofd, uap->to, UIO_USERSPACE, uap->fhp));
|
|
}
|
|
|
|
static int
|
|
kern_fhlinkat(struct thread *td, int fd, const char *path,
|
|
enum uio_seg pathseg, fhandle_t *fhp)
|
|
{
|
|
fhandle_t fh;
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
error = priv_check(td, PRIV_VFS_GETFH);
|
|
if (error != 0)
|
|
return (error);
|
|
error = copyin(fhp, &fh, sizeof(fh));
|
|
if (error != 0)
|
|
return (error);
|
|
do {
|
|
bwillwrite();
|
|
if ((mp = vfs_busyfs(&fh.fh_fsid)) == NULL)
|
|
return (ESTALE);
|
|
error = VFS_FHTOVP(mp, &fh.fh_fid, LK_SHARED, &vp);
|
|
vfs_unbusy(mp);
|
|
if (error != 0)
|
|
return (error);
|
|
VOP_UNLOCK(vp);
|
|
error = kern_linkat_vp(td, vp, fd, path, pathseg);
|
|
} while (error == EAGAIN || error == ERELOOKUP);
|
|
return (error);
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fhreadlink_args {
|
|
fhandle_t *fhp;
|
|
char *buf;
|
|
size_t bufsize;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fhreadlink(struct thread *td, struct fhreadlink_args *uap)
|
|
{
|
|
fhandle_t fh;
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
error = priv_check(td, PRIV_VFS_GETFH);
|
|
if (error != 0)
|
|
return (error);
|
|
if (uap->bufsize > IOSIZE_MAX)
|
|
return (EINVAL);
|
|
error = copyin(uap->fhp, &fh, sizeof(fh));
|
|
if (error != 0)
|
|
return (error);
|
|
if ((mp = vfs_busyfs(&fh.fh_fsid)) == NULL)
|
|
return (ESTALE);
|
|
error = VFS_FHTOVP(mp, &fh.fh_fid, LK_SHARED, &vp);
|
|
vfs_unbusy(mp);
|
|
if (error != 0)
|
|
return (error);
|
|
error = kern_readlink_vp(vp, uap->buf, UIO_USERSPACE, uap->bufsize, td);
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* syscall for the rpc.lockd to use to translate a NFS file handle into an
|
|
* open descriptor.
|
|
*
|
|
* warning: do not remove the priv_check() call or this becomes one giant
|
|
* security hole.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fhopen_args {
|
|
const struct fhandle *u_fhp;
|
|
int flags;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fhopen(struct thread *td, struct fhopen_args *uap)
|
|
{
|
|
return (kern_fhopen(td, uap->u_fhp, uap->flags));
|
|
}
|
|
|
|
int
|
|
kern_fhopen(struct thread *td, const struct fhandle *u_fhp, int flags)
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
struct fhandle fhp;
|
|
struct file *fp;
|
|
int fmode, error;
|
|
int indx;
|
|
|
|
error = priv_check(td, PRIV_VFS_FHOPEN);
|
|
if (error != 0)
|
|
return (error);
|
|
indx = -1;
|
|
fmode = FFLAGS(flags);
|
|
/* why not allow a non-read/write open for our lockd? */
|
|
if (((fmode & (FREAD | FWRITE)) == 0) || (fmode & O_CREAT))
|
|
return (EINVAL);
|
|
error = copyin(u_fhp, &fhp, sizeof(fhp));
|
|
if (error != 0)
|
|
return(error);
|
|
/* find the mount point */
|
|
mp = vfs_busyfs(&fhp.fh_fsid);
|
|
if (mp == NULL)
|
|
return (ESTALE);
|
|
/* now give me my vnode, it gets returned to me locked */
|
|
error = VFS_FHTOVP(mp, &fhp.fh_fid, LK_EXCLUSIVE, &vp);
|
|
vfs_unbusy(mp);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
error = falloc_noinstall(td, &fp);
|
|
if (error != 0) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
/*
|
|
* An extra reference on `fp' has been held for us by
|
|
* falloc_noinstall().
|
|
*/
|
|
|
|
#ifdef INVARIANTS
|
|
td->td_dupfd = -1;
|
|
#endif
|
|
error = vn_open_vnode(vp, fmode, td->td_ucred, td, fp);
|
|
if (error != 0) {
|
|
KASSERT(fp->f_ops == &badfileops,
|
|
("VOP_OPEN in fhopen() set f_ops"));
|
|
KASSERT(td->td_dupfd < 0,
|
|
("fhopen() encountered fdopen()"));
|
|
|
|
vput(vp);
|
|
goto bad;
|
|
}
|
|
#ifdef INVARIANTS
|
|
td->td_dupfd = 0;
|
|
#endif
|
|
fp->f_vnode = vp;
|
|
finit_vnode(fp, fmode, NULL, &vnops);
|
|
VOP_UNLOCK(vp);
|
|
if ((fmode & O_TRUNC) != 0) {
|
|
error = fo_truncate(fp, 0, td->td_ucred, td);
|
|
if (error != 0)
|
|
goto bad;
|
|
}
|
|
|
|
error = finstall(td, fp, &indx, fmode, NULL);
|
|
bad:
|
|
fdrop(fp, td);
|
|
td->td_retval[0] = indx;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Stat an (NFS) file handle.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fhstat_args {
|
|
struct fhandle *u_fhp;
|
|
struct stat *sb;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fhstat(struct thread *td, struct fhstat_args *uap)
|
|
{
|
|
struct stat sb;
|
|
struct fhandle fh;
|
|
int error;
|
|
|
|
error = copyin(uap->u_fhp, &fh, sizeof(fh));
|
|
if (error != 0)
|
|
return (error);
|
|
error = kern_fhstat(td, fh, &sb);
|
|
if (error == 0)
|
|
error = copyout(&sb, uap->sb, sizeof(sb));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_fhstat(struct thread *td, struct fhandle fh, struct stat *sb)
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
error = priv_check(td, PRIV_VFS_FHSTAT);
|
|
if (error != 0)
|
|
return (error);
|
|
if ((mp = vfs_busyfs(&fh.fh_fsid)) == NULL)
|
|
return (ESTALE);
|
|
error = VFS_FHTOVP(mp, &fh.fh_fid, LK_EXCLUSIVE, &vp);
|
|
vfs_unbusy(mp);
|
|
if (error != 0)
|
|
return (error);
|
|
error = VOP_STAT(vp, sb, td->td_ucred, NOCRED);
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Implement fstatfs() for (NFS) file handles.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fhstatfs_args {
|
|
struct fhandle *u_fhp;
|
|
struct statfs *buf;
|
|
};
|
|
#endif
|
|
int
|
|
sys_fhstatfs(struct thread *td, struct fhstatfs_args *uap)
|
|
{
|
|
struct statfs *sfp;
|
|
fhandle_t fh;
|
|
int error;
|
|
|
|
error = copyin(uap->u_fhp, &fh, sizeof(fhandle_t));
|
|
if (error != 0)
|
|
return (error);
|
|
sfp = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
|
|
error = kern_fhstatfs(td, fh, sfp);
|
|
if (error == 0)
|
|
error = copyout(sfp, uap->buf, sizeof(*sfp));
|
|
free(sfp, M_STATFS);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_fhstatfs(struct thread *td, fhandle_t fh, struct statfs *buf)
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
error = priv_check(td, PRIV_VFS_FHSTATFS);
|
|
if (error != 0)
|
|
return (error);
|
|
if ((mp = vfs_busyfs(&fh.fh_fsid)) == NULL)
|
|
return (ESTALE);
|
|
error = VFS_FHTOVP(mp, &fh.fh_fid, LK_EXCLUSIVE, &vp);
|
|
if (error != 0) {
|
|
vfs_unbusy(mp);
|
|
return (error);
|
|
}
|
|
vput(vp);
|
|
error = prison_canseemount(td->td_ucred, mp);
|
|
if (error != 0)
|
|
goto out;
|
|
#ifdef MAC
|
|
error = mac_mount_check_stat(td->td_ucred, mp);
|
|
if (error != 0)
|
|
goto out;
|
|
#endif
|
|
error = VFS_STATFS(mp, buf);
|
|
out:
|
|
vfs_unbusy(mp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Unlike madvise(2), we do not make a best effort to remember every
|
|
* possible caching hint. Instead, we remember the last setting with
|
|
* the exception that we will allow POSIX_FADV_NORMAL to adjust the
|
|
* region of any current setting.
|
|
*/
|
|
int
|
|
kern_posix_fadvise(struct thread *td, int fd, off_t offset, off_t len,
|
|
int advice)
|
|
{
|
|
struct fadvise_info *fa, *new;
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
off_t end;
|
|
int error;
|
|
|
|
if (offset < 0 || len < 0 || offset > OFF_MAX - len)
|
|
return (EINVAL);
|
|
AUDIT_ARG_VALUE(advice);
|
|
switch (advice) {
|
|
case POSIX_FADV_SEQUENTIAL:
|
|
case POSIX_FADV_RANDOM:
|
|
case POSIX_FADV_NOREUSE:
|
|
new = malloc(sizeof(*fa), M_FADVISE, M_WAITOK);
|
|
break;
|
|
case POSIX_FADV_NORMAL:
|
|
case POSIX_FADV_WILLNEED:
|
|
case POSIX_FADV_DONTNEED:
|
|
new = NULL;
|
|
break;
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
/* XXX: CAP_POSIX_FADVISE? */
|
|
AUDIT_ARG_FD(fd);
|
|
error = fget(td, fd, &cap_no_rights, &fp);
|
|
if (error != 0)
|
|
goto out;
|
|
AUDIT_ARG_FILE(td->td_proc, fp);
|
|
if ((fp->f_ops->fo_flags & DFLAG_SEEKABLE) == 0) {
|
|
error = ESPIPE;
|
|
goto out;
|
|
}
|
|
if (fp->f_type != DTYPE_VNODE) {
|
|
error = ENODEV;
|
|
goto out;
|
|
}
|
|
vp = fp->f_vnode;
|
|
if (vp->v_type != VREG) {
|
|
error = ENODEV;
|
|
goto out;
|
|
}
|
|
if (len == 0)
|
|
end = OFF_MAX;
|
|
else
|
|
end = offset + len - 1;
|
|
switch (advice) {
|
|
case POSIX_FADV_SEQUENTIAL:
|
|
case POSIX_FADV_RANDOM:
|
|
case POSIX_FADV_NOREUSE:
|
|
/*
|
|
* Try to merge any existing non-standard region with
|
|
* this new region if possible, otherwise create a new
|
|
* non-standard region for this request.
|
|
*/
|
|
mtx_pool_lock(mtxpool_sleep, fp);
|
|
fa = fp->f_advice;
|
|
if (fa != NULL && fa->fa_advice == advice &&
|
|
((fa->fa_start <= end && fa->fa_end >= offset) ||
|
|
(end != OFF_MAX && fa->fa_start == end + 1) ||
|
|
(fa->fa_end != OFF_MAX && fa->fa_end + 1 == offset))) {
|
|
if (offset < fa->fa_start)
|
|
fa->fa_start = offset;
|
|
if (end > fa->fa_end)
|
|
fa->fa_end = end;
|
|
} else {
|
|
new->fa_advice = advice;
|
|
new->fa_start = offset;
|
|
new->fa_end = end;
|
|
fp->f_advice = new;
|
|
new = fa;
|
|
}
|
|
mtx_pool_unlock(mtxpool_sleep, fp);
|
|
break;
|
|
case POSIX_FADV_NORMAL:
|
|
/*
|
|
* If a the "normal" region overlaps with an existing
|
|
* non-standard region, trim or remove the
|
|
* non-standard region.
|
|
*/
|
|
mtx_pool_lock(mtxpool_sleep, fp);
|
|
fa = fp->f_advice;
|
|
if (fa != NULL) {
|
|
if (offset <= fa->fa_start && end >= fa->fa_end) {
|
|
new = fa;
|
|
fp->f_advice = NULL;
|
|
} else if (offset <= fa->fa_start &&
|
|
end >= fa->fa_start)
|
|
fa->fa_start = end + 1;
|
|
else if (offset <= fa->fa_end && end >= fa->fa_end)
|
|
fa->fa_end = offset - 1;
|
|
else if (offset >= fa->fa_start && end <= fa->fa_end) {
|
|
/*
|
|
* If the "normal" region is a middle
|
|
* portion of the existing
|
|
* non-standard region, just remove
|
|
* the whole thing rather than picking
|
|
* one side or the other to
|
|
* preserve.
|
|
*/
|
|
new = fa;
|
|
fp->f_advice = NULL;
|
|
}
|
|
}
|
|
mtx_pool_unlock(mtxpool_sleep, fp);
|
|
break;
|
|
case POSIX_FADV_WILLNEED:
|
|
case POSIX_FADV_DONTNEED:
|
|
error = VOP_ADVISE(vp, offset, end, advice);
|
|
break;
|
|
}
|
|
out:
|
|
if (fp != NULL)
|
|
fdrop(fp, td);
|
|
free(new, M_FADVISE);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_posix_fadvise(struct thread *td, struct posix_fadvise_args *uap)
|
|
{
|
|
int error;
|
|
|
|
error = kern_posix_fadvise(td, uap->fd, uap->offset, uap->len,
|
|
uap->advice);
|
|
return (kern_posix_error(td, error));
|
|
}
|
|
|
|
int
|
|
kern_copy_file_range(struct thread *td, int infd, off_t *inoffp, int outfd,
|
|
off_t *outoffp, size_t len, unsigned int flags)
|
|
{
|
|
struct file *infp, *outfp;
|
|
struct vnode *invp, *outvp;
|
|
int error;
|
|
size_t retlen;
|
|
void *rl_rcookie, *rl_wcookie;
|
|
off_t savinoff, savoutoff;
|
|
|
|
infp = outfp = NULL;
|
|
rl_rcookie = rl_wcookie = NULL;
|
|
savinoff = -1;
|
|
error = 0;
|
|
retlen = 0;
|
|
|
|
if (flags != 0) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
if (len > SSIZE_MAX)
|
|
/*
|
|
* Although the len argument is size_t, the return argument
|
|
* is ssize_t (which is signed). Therefore a size that won't
|
|
* fit in ssize_t can't be returned.
|
|
*/
|
|
len = SSIZE_MAX;
|
|
|
|
/* Get the file structures for the file descriptors. */
|
|
error = fget_read(td, infd, &cap_read_rights, &infp);
|
|
if (error != 0)
|
|
goto out;
|
|
if (infp->f_ops == &badfileops) {
|
|
error = EBADF;
|
|
goto out;
|
|
}
|
|
if (infp->f_vnode == NULL) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
error = fget_write(td, outfd, &cap_write_rights, &outfp);
|
|
if (error != 0)
|
|
goto out;
|
|
if (outfp->f_ops == &badfileops) {
|
|
error = EBADF;
|
|
goto out;
|
|
}
|
|
if (outfp->f_vnode == NULL) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* Set the offset pointers to the correct place. */
|
|
if (inoffp == NULL)
|
|
inoffp = &infp->f_offset;
|
|
if (outoffp == NULL)
|
|
outoffp = &outfp->f_offset;
|
|
savinoff = *inoffp;
|
|
savoutoff = *outoffp;
|
|
|
|
invp = infp->f_vnode;
|
|
outvp = outfp->f_vnode;
|
|
/* Sanity check the f_flag bits. */
|
|
if ((outfp->f_flag & (FWRITE | FAPPEND)) != FWRITE ||
|
|
(infp->f_flag & FREAD) == 0) {
|
|
error = EBADF;
|
|
goto out;
|
|
}
|
|
|
|
/* If len == 0, just return 0. */
|
|
if (len == 0)
|
|
goto out;
|
|
|
|
/*
|
|
* If infp and outfp refer to the same file, the byte ranges cannot
|
|
* overlap.
|
|
*/
|
|
if (invp == outvp && ((savinoff <= savoutoff && savinoff + len >
|
|
savoutoff) || (savinoff > savoutoff && savoutoff + len >
|
|
savinoff))) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* Range lock the byte ranges for both invp and outvp. */
|
|
for (;;) {
|
|
rl_wcookie = vn_rangelock_wlock(outvp, *outoffp, *outoffp +
|
|
len);
|
|
rl_rcookie = vn_rangelock_tryrlock(invp, *inoffp, *inoffp +
|
|
len);
|
|
if (rl_rcookie != NULL)
|
|
break;
|
|
vn_rangelock_unlock(outvp, rl_wcookie);
|
|
rl_rcookie = vn_rangelock_rlock(invp, *inoffp, *inoffp + len);
|
|
vn_rangelock_unlock(invp, rl_rcookie);
|
|
}
|
|
|
|
retlen = len;
|
|
error = vn_copy_file_range(invp, inoffp, outvp, outoffp, &retlen,
|
|
flags, infp->f_cred, outfp->f_cred, td);
|
|
out:
|
|
if (rl_rcookie != NULL)
|
|
vn_rangelock_unlock(invp, rl_rcookie);
|
|
if (rl_wcookie != NULL)
|
|
vn_rangelock_unlock(outvp, rl_wcookie);
|
|
if (savinoff != -1 && (error == EINTR || error == ERESTART)) {
|
|
*inoffp = savinoff;
|
|
*outoffp = savoutoff;
|
|
}
|
|
if (outfp != NULL)
|
|
fdrop(outfp, td);
|
|
if (infp != NULL)
|
|
fdrop(infp, td);
|
|
td->td_retval[0] = retlen;
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_copy_file_range(struct thread *td, struct copy_file_range_args *uap)
|
|
{
|
|
off_t inoff, outoff, *inoffp, *outoffp;
|
|
int error;
|
|
|
|
inoffp = outoffp = NULL;
|
|
if (uap->inoffp != NULL) {
|
|
error = copyin(uap->inoffp, &inoff, sizeof(off_t));
|
|
if (error != 0)
|
|
return (error);
|
|
inoffp = &inoff;
|
|
}
|
|
if (uap->outoffp != NULL) {
|
|
error = copyin(uap->outoffp, &outoff, sizeof(off_t));
|
|
if (error != 0)
|
|
return (error);
|
|
outoffp = &outoff;
|
|
}
|
|
error = kern_copy_file_range(td, uap->infd, inoffp, uap->outfd,
|
|
outoffp, uap->len, uap->flags);
|
|
if (error == 0 && uap->inoffp != NULL)
|
|
error = copyout(inoffp, uap->inoffp, sizeof(off_t));
|
|
if (error == 0 && uap->outoffp != NULL)
|
|
error = copyout(outoffp, uap->outoffp, sizeof(off_t));
|
|
return (error);
|
|
}
|