This eliminates a race where MNT_UPDATE flag could be lost when nmount() raced against sync(), sync_fsync() or quotactl().
5084 lines
107 KiB
C
5084 lines
107 KiB
C
/*-
|
|
* 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.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)vfs_syscalls.c 8.13 (Berkeley) 4/15/94
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|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "opt_compat.h"
|
|
#include "opt_mac.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/bio.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/sysent.h>
|
|
#include <sys/mac.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/limits.h>
|
|
#include <sys/linker.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/sx.h>
|
|
#include <sys/unistd.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/dirent.h>
|
|
#include <sys/extattr.h>
|
|
#include <sys/jail.h>
|
|
#include <sys/syscallsubr.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <machine/stdarg.h>
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|
|
|
#include <security/audit/audit.h>
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|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_object.h>
|
|
#include <vm/vm_page.h>
|
|
#include <vm/uma.h>
|
|
|
|
static int chroot_refuse_vdir_fds(struct filedesc *fdp);
|
|
static int getutimes(const struct timeval *, enum uio_seg, struct timespec *);
|
|
static int setfown(struct thread *td, struct vnode *, uid_t, gid_t);
|
|
static int setfmode(struct thread *td, struct vnode *, int);
|
|
static int setfflags(struct thread *td, struct vnode *, 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 extattr_list_vp(struct vnode *vp, int attrnamespace, void *data,
|
|
size_t nbytes, struct thread *td);
|
|
|
|
int (*union_dircheckp)(struct thread *td, struct vnode **, struct file *);
|
|
|
|
/*
|
|
* The module initialization routine for POSIX asynchronous I/O will
|
|
* set this to the version of AIO that it implements. (Zero means
|
|
* that it is not implemented.) This value is used here by pathconf()
|
|
* and in kern_descrip.c by fpathconf().
|
|
*/
|
|
int async_io_version;
|
|
|
|
/*
|
|
* Sync each mounted filesystem.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct sync_args {
|
|
int dummy;
|
|
};
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
static int syncprt = 0;
|
|
SYSCTL_INT(_debug, OID_AUTO, syncprt, CTLFLAG_RW, &syncprt, 0, "");
|
|
#endif
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
sync(td, uap)
|
|
struct thread *td;
|
|
struct sync_args *uap;
|
|
{
|
|
struct mount *mp, *nmp;
|
|
int vfslocked;
|
|
int asyncflag;
|
|
|
|
mtx_lock(&mountlist_mtx);
|
|
for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) {
|
|
if (vfs_busy(mp, LK_NOWAIT, &mountlist_mtx, td)) {
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
continue;
|
|
}
|
|
vfslocked = VFS_LOCK_GIANT(mp);
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0 &&
|
|
vn_start_write(NULL, &mp, V_NOWAIT) == 0) {
|
|
MNT_ILOCK(mp);
|
|
asyncflag = mp->mnt_flag & MNT_ASYNC;
|
|
mp->mnt_flag &= ~MNT_ASYNC;
|
|
MNT_IUNLOCK(mp);
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|
vfs_msync(mp, MNT_NOWAIT);
|
|
VFS_SYNC(mp, MNT_NOWAIT, td);
|
|
MNT_ILOCK(mp);
|
|
mp->mnt_flag |= asyncflag;
|
|
MNT_IUNLOCK(mp);
|
|
vn_finished_write(mp);
|
|
}
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
mtx_lock(&mountlist_mtx);
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
vfs_unbusy(mp, td);
|
|
}
|
|
mtx_unlock(&mountlist_mtx);
|
|
return (0);
|
|
}
|
|
|
|
/* XXX PRISON: could be per prison flag */
|
|
static int prison_quotas;
|
|
#if 0
|
|
SYSCTL_INT(_kern_prison, OID_AUTO, quotas, CTLFLAG_RW, &prison_quotas, 0, "");
|
|
#endif
|
|
|
|
/*
|
|
* Change filesystem quotas.
|
|
*
|
|
* MP SAFE
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct quotactl_args {
|
|
char *path;
|
|
int cmd;
|
|
int uid;
|
|
caddr_t arg;
|
|
};
|
|
#endif
|
|
int
|
|
quotactl(td, uap)
|
|
struct thread *td;
|
|
register struct quotactl_args /* {
|
|
char *path;
|
|
int cmd;
|
|
int uid;
|
|
caddr_t arg;
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|
} */ *uap;
|
|
{
|
|
struct mount *mp, *vmp;
|
|
int vfslocked;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
AUDIT_ARG(cmd, uap->cmd);
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|
AUDIT_ARG(uid, uap->uid);
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|
if (jailed(td->td_ucred) && !prison_quotas)
|
|
return (EPERM);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE | AUDITVNODE1,
|
|
UIO_USERSPACE, uap->path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = vn_start_write(nd.ni_vp, &vmp, V_WAIT | PCATCH);
|
|
mp = nd.ni_vp->v_mount;
|
|
vrele(nd.ni_vp);
|
|
if (error)
|
|
goto out;
|
|
error = VFS_QUOTACTL(mp, uap->cmd, uap->uid, uap->arg, td);
|
|
vn_finished_write(vmp);
|
|
out:
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct statfs_args {
|
|
char *path;
|
|
struct statfs *buf;
|
|
};
|
|
#endif
|
|
int
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|
statfs(td, uap)
|
|
struct thread *td;
|
|
register struct statfs_args /* {
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|
char *path;
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|
struct statfs *buf;
|
|
} */ *uap;
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|
{
|
|
struct statfs sf;
|
|
int error;
|
|
|
|
error = kern_statfs(td, uap->path, UIO_USERSPACE, &sf);
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|
if (error == 0)
|
|
error = copyout(&sf, uap->buf, sizeof(sf));
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|
return (error);
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|
}
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|
|
|
int
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|
kern_statfs(struct thread *td, char *path, enum uio_seg pathseg,
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|
struct statfs *buf)
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|
{
|
|
struct mount *mp;
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|
struct statfs *sp, sb;
|
|
int vfslocked;
|
|
int error;
|
|
struct nameidata nd;
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|
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|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | MPSAFE | AUDITVNODE1,
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pathseg, path, td);
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|
error = namei(&nd);
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|
if (error)
|
|
return (error);
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|
vfslocked = NDHASGIANT(&nd);
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|
mp = nd.ni_vp->v_mount;
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|
vfs_ref(mp);
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|
NDFREE(&nd, NDF_ONLY_PNBUF);
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|
vput(nd.ni_vp);
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|
#ifdef MAC
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|
error = mac_check_mount_stat(td->td_ucred, mp);
|
|
if (error)
|
|
goto out;
|
|
#endif
|
|
/*
|
|
* Set these in case the underlying filesystem fails to do so.
|
|
*/
|
|
sp = &mp->mnt_stat;
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|
sp->f_version = STATFS_VERSION;
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|
sp->f_namemax = NAME_MAX;
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|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
error = VFS_STATFS(mp, sp, td);
|
|
if (error)
|
|
goto out;
|
|
if (suser(td)) {
|
|
bcopy(sp, &sb, sizeof(sb));
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|
sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;
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|
prison_enforce_statfs(td->td_ucred, mp, &sb);
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|
sp = &sb;
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|
}
|
|
*buf = *sp;
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|
out:
|
|
vfs_rel(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
if (mtx_owned(&Giant))
|
|
printf("statfs(%d): %s: %d\n", vfslocked, path, error);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fstatfs_args {
|
|
int fd;
|
|
struct statfs *buf;
|
|
};
|
|
#endif
|
|
int
|
|
fstatfs(td, uap)
|
|
struct thread *td;
|
|
register struct fstatfs_args /* {
|
|
int fd;
|
|
struct statfs *buf;
|
|
} */ *uap;
|
|
{
|
|
struct statfs sf;
|
|
int error;
|
|
|
|
error = kern_fstatfs(td, uap->fd, &sf);
|
|
if (error == 0)
|
|
error = copyout(&sf, uap->buf, sizeof(sf));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_fstatfs(struct thread *td, int fd, struct statfs *buf)
|
|
{
|
|
struct file *fp;
|
|
struct mount *mp;
|
|
struct statfs *sp, sb;
|
|
int vfslocked;
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
AUDIT_ARG(fd, fd);
|
|
error = getvnode(td->td_proc->p_fd, fd, &fp);
|
|
if (error)
|
|
return (error);
|
|
vp = fp->f_vnode;
|
|
vfslocked = VFS_LOCK_GIANT(vp->v_mount);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
#ifdef AUDIT
|
|
AUDIT_ARG(vnode, vp, ARG_VNODE1);
|
|
#endif
|
|
mp = vp->v_mount;
|
|
if (mp)
|
|
vfs_ref(mp);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
fdrop(fp, td);
|
|
if (vp->v_iflag & VI_DOOMED) {
|
|
error = EBADF;
|
|
goto out;
|
|
}
|
|
#ifdef MAC
|
|
error = mac_check_mount_stat(td->td_ucred, mp);
|
|
if (error)
|
|
goto out;
|
|
#endif
|
|
/*
|
|
* Set these in case the underlying filesystem fails to do so.
|
|
*/
|
|
sp = &mp->mnt_stat;
|
|
sp->f_version = STATFS_VERSION;
|
|
sp->f_namemax = NAME_MAX;
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
error = VFS_STATFS(mp, sp, td);
|
|
if (error)
|
|
goto out;
|
|
if (suser(td)) {
|
|
bcopy(sp, &sb, sizeof(sb));
|
|
sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;
|
|
prison_enforce_statfs(td->td_ucred, mp, &sb);
|
|
sp = &sb;
|
|
}
|
|
*buf = *sp;
|
|
out:
|
|
if (mp)
|
|
vfs_rel(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get statistics on all filesystems.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct getfsstat_args {
|
|
struct statfs *buf;
|
|
long bufsize;
|
|
int flags;
|
|
};
|
|
#endif
|
|
int
|
|
getfsstat(td, uap)
|
|
struct thread *td;
|
|
register struct getfsstat_args /* {
|
|
struct statfs *buf;
|
|
long bufsize;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_getfsstat(td, &uap->buf, uap->bufsize, UIO_USERSPACE,
|
|
uap->flags));
|
|
}
|
|
|
|
/*
|
|
* 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,
|
|
enum uio_seg bufseg, int flags)
|
|
{
|
|
struct mount *mp, *nmp;
|
|
struct statfs *sfsp, *sp, sb;
|
|
size_t count, maxcount;
|
|
int vfslocked;
|
|
int error;
|
|
|
|
maxcount = bufsize / sizeof(struct statfs);
|
|
if (bufsize == 0)
|
|
sfsp = NULL;
|
|
else if (bufseg == UIO_USERSPACE)
|
|
sfsp = *buf;
|
|
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;
|
|
sfsp = *buf = malloc(maxcount * sizeof(struct statfs), M_TEMP,
|
|
M_WAITOK);
|
|
}
|
|
count = 0;
|
|
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_check_mount_stat(td->td_ucred, mp) != 0) {
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
continue;
|
|
}
|
|
#endif
|
|
if (vfs_busy(mp, LK_NOWAIT, &mountlist_mtx, td)) {
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
continue;
|
|
}
|
|
vfslocked = VFS_LOCK_GIANT(mp);
|
|
if (sfsp && count < maxcount) {
|
|
sp = &mp->mnt_stat;
|
|
/*
|
|
* Set these in case the underlying filesystem
|
|
* fails to do so.
|
|
*/
|
|
sp->f_version = STATFS_VERSION;
|
|
sp->f_namemax = NAME_MAX;
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
/*
|
|
* If MNT_NOWAIT or MNT_LAZY is specified, do not
|
|
* refresh the fsstat cache. MNT_NOWAIT or MNT_LAZY
|
|
* overrides MNT_WAIT.
|
|
*/
|
|
if (((flags & (MNT_LAZY|MNT_NOWAIT)) == 0 ||
|
|
(flags & MNT_WAIT)) &&
|
|
(error = VFS_STATFS(mp, sp, td))) {
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
mtx_lock(&mountlist_mtx);
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
vfs_unbusy(mp, td);
|
|
continue;
|
|
}
|
|
if (suser(td)) {
|
|
bcopy(sp, &sb, sizeof(sb));
|
|
sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;
|
|
prison_enforce_statfs(td->td_ucred, mp, &sb);
|
|
sp = &sb;
|
|
}
|
|
if (bufseg == UIO_SYSSPACE)
|
|
bcopy(sp, sfsp, sizeof(*sp));
|
|
else /* if (bufseg == UIO_USERSPACE) */ {
|
|
error = copyout(sp, sfsp, sizeof(*sp));
|
|
if (error) {
|
|
vfs_unbusy(mp, td);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
}
|
|
sfsp++;
|
|
}
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
count++;
|
|
mtx_lock(&mountlist_mtx);
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
vfs_unbusy(mp, td);
|
|
}
|
|
mtx_unlock(&mountlist_mtx);
|
|
if (sfsp && count > maxcount)
|
|
td->td_retval[0] = maxcount;
|
|
else
|
|
td->td_retval[0] = count;
|
|
return (0);
|
|
}
|
|
|
|
#ifdef COMPAT_FREEBSD4
|
|
/*
|
|
* Get old format filesystem statistics.
|
|
*/
|
|
static void cvtstatfs(struct statfs *, struct ostatfs *);
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct freebsd4_statfs_args {
|
|
char *path;
|
|
struct ostatfs *buf;
|
|
};
|
|
#endif
|
|
int
|
|
freebsd4_statfs(td, uap)
|
|
struct thread *td;
|
|
struct freebsd4_statfs_args /* {
|
|
char *path;
|
|
struct ostatfs *buf;
|
|
} */ *uap;
|
|
{
|
|
struct ostatfs osb;
|
|
struct statfs sf;
|
|
int error;
|
|
|
|
error = kern_statfs(td, uap->path, UIO_USERSPACE, &sf);
|
|
if (error)
|
|
return (error);
|
|
cvtstatfs(&sf, &osb);
|
|
return (copyout(&osb, uap->buf, sizeof(osb)));
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct freebsd4_fstatfs_args {
|
|
int fd;
|
|
struct ostatfs *buf;
|
|
};
|
|
#endif
|
|
int
|
|
freebsd4_fstatfs(td, uap)
|
|
struct thread *td;
|
|
struct freebsd4_fstatfs_args /* {
|
|
int fd;
|
|
struct ostatfs *buf;
|
|
} */ *uap;
|
|
{
|
|
struct ostatfs osb;
|
|
struct statfs sf;
|
|
int error;
|
|
|
|
error = kern_fstatfs(td, uap->fd, &sf);
|
|
if (error)
|
|
return (error);
|
|
cvtstatfs(&sf, &osb);
|
|
return (copyout(&osb, uap->buf, sizeof(osb)));
|
|
}
|
|
|
|
/*
|
|
* Get statistics on all filesystems.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct freebsd4_getfsstat_args {
|
|
struct ostatfs *buf;
|
|
long bufsize;
|
|
int flags;
|
|
};
|
|
#endif
|
|
int
|
|
freebsd4_getfsstat(td, uap)
|
|
struct thread *td;
|
|
register struct freebsd4_getfsstat_args /* {
|
|
struct ostatfs *buf;
|
|
long bufsize;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct statfs *buf, *sp;
|
|
struct ostatfs osb;
|
|
size_t count, size;
|
|
int error;
|
|
|
|
count = uap->bufsize / sizeof(struct ostatfs);
|
|
size = count * sizeof(struct statfs);
|
|
error = kern_getfsstat(td, &buf, size, UIO_SYSSPACE, uap->flags);
|
|
if (size > 0) {
|
|
count = td->td_retval[0];
|
|
sp = buf;
|
|
while (count > 0 && error == 0) {
|
|
cvtstatfs(sp, &osb);
|
|
error = copyout(&osb, uap->buf, sizeof(osb));
|
|
sp++;
|
|
uap->buf++;
|
|
count--;
|
|
}
|
|
free(buf, M_TEMP);
|
|
}
|
|
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(td, uap)
|
|
struct thread *td;
|
|
struct freebsd4_fhstatfs_args /* {
|
|
struct fhandle *u_fhp;
|
|
struct ostatfs *buf;
|
|
} */ *uap;
|
|
{
|
|
struct ostatfs osb;
|
|
struct statfs sf;
|
|
fhandle_t fh;
|
|
int error;
|
|
|
|
error = copyin(uap->u_fhp, &fh, sizeof(fhandle_t));
|
|
if (error)
|
|
return (error);
|
|
error = kern_fhstatfs(td, fh, &sf);
|
|
if (error)
|
|
return (error);
|
|
cvtstatfs(&sf, &osb);
|
|
return (copyout(&osb, uap->buf, sizeof(osb)));
|
|
}
|
|
|
|
/*
|
|
* Convert a new format statfs structure to an old format statfs structure.
|
|
*/
|
|
static void
|
|
cvtstatfs(nsp, osp)
|
|
struct statfs *nsp;
|
|
struct ostatfs *osp;
|
|
{
|
|
|
|
bzero(osp, sizeof(*osp));
|
|
osp->f_bsize = MIN(nsp->f_bsize, LONG_MAX);
|
|
osp->f_iosize = MIN(nsp->f_iosize, LONG_MAX);
|
|
osp->f_blocks = MIN(nsp->f_blocks, LONG_MAX);
|
|
osp->f_bfree = MIN(nsp->f_bfree, LONG_MAX);
|
|
osp->f_bavail = MIN(nsp->f_bavail, LONG_MAX);
|
|
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 */
|
|
|
|
/*
|
|
* Change current working directory to a given file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchdir_args {
|
|
int fd;
|
|
};
|
|
#endif
|
|
int
|
|
fchdir(td, uap)
|
|
struct thread *td;
|
|
struct fchdir_args /* {
|
|
int fd;
|
|
} */ *uap;
|
|
{
|
|
register struct filedesc *fdp = td->td_proc->p_fd;
|
|
struct vnode *vp, *tdp, *vpold;
|
|
struct mount *mp;
|
|
struct file *fp;
|
|
int vfslocked;
|
|
int error;
|
|
|
|
AUDIT_ARG(fd, uap->fd);
|
|
if ((error = getvnode(fdp, uap->fd, &fp)) != 0)
|
|
return (error);
|
|
vp = fp->f_vnode;
|
|
VREF(vp);
|
|
fdrop(fp, td);
|
|
vfslocked = VFS_LOCK_GIANT(vp->v_mount);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
AUDIT_ARG(vnode, vp, ARG_VNODE1);
|
|
error = change_dir(vp, td);
|
|
while (!error && (mp = vp->v_mountedhere) != NULL) {
|
|
int tvfslocked;
|
|
if (vfs_busy(mp, 0, 0, td))
|
|
continue;
|
|
tvfslocked = VFS_LOCK_GIANT(mp);
|
|
error = VFS_ROOT(mp, LK_EXCLUSIVE, &tdp, td);
|
|
vfs_unbusy(mp, td);
|
|
if (error) {
|
|
VFS_UNLOCK_GIANT(tvfslocked);
|
|
break;
|
|
}
|
|
vput(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
vp = tdp;
|
|
vfslocked = tvfslocked;
|
|
}
|
|
if (error) {
|
|
vput(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
VOP_UNLOCK(vp, 0, td);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
FILEDESC_LOCK_FAST(fdp);
|
|
vpold = fdp->fd_cdir;
|
|
fdp->fd_cdir = vp;
|
|
FILEDESC_UNLOCK_FAST(fdp);
|
|
vfslocked = VFS_LOCK_GIANT(vpold->v_mount);
|
|
vrele(vpold);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Change current working directory (``.'').
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chdir_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
int
|
|
chdir(td, uap)
|
|
struct thread *td;
|
|
struct chdir_args /* {
|
|
char *path;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_chdir(td, uap->path, UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_chdir(struct thread *td, char *path, enum uio_seg pathseg)
|
|
{
|
|
register struct filedesc *fdp = td->td_proc->p_fd;
|
|
int error;
|
|
struct nameidata nd;
|
|
struct vnode *vp;
|
|
int vfslocked;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | AUDITVNODE1 | MPSAFE,
|
|
pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
if ((error = change_dir(nd.ni_vp, td)) != 0) {
|
|
vput(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
return (error);
|
|
}
|
|
VOP_UNLOCK(nd.ni_vp, 0, td);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
FILEDESC_LOCK_FAST(fdp);
|
|
vp = fdp->fd_cdir;
|
|
fdp->fd_cdir = nd.ni_vp;
|
|
FILEDESC_UNLOCK_FAST(fdp);
|
|
vfslocked = VFS_LOCK_GIANT(vp->v_mount);
|
|
vrele(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Helper function for raised chroot(2) security function: Refuse if
|
|
* any filedescriptors are open directories.
|
|
*/
|
|
static int
|
|
chroot_refuse_vdir_fds(fdp)
|
|
struct filedesc *fdp;
|
|
{
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int fd;
|
|
|
|
FILEDESC_LOCK_ASSERT(fdp, MA_OWNED);
|
|
for (fd = 0; fd < fdp->fd_nfiles ; fd++) {
|
|
fp = fget_locked(fdp, fd);
|
|
if (fp == NULL)
|
|
continue;
|
|
if (fp->f_type == DTYPE_VNODE) {
|
|
vp = fp->f_vnode;
|
|
if (vp->v_type == VDIR)
|
|
return (EPERM);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* This sysctl determines if we will allow a process to chroot(2) if it
|
|
* has a directory open:
|
|
* 0: disallowed for all processes.
|
|
* 1: allowed for processes that were not already chroot(2)'ed.
|
|
* 2: allowed for all processes.
|
|
*/
|
|
|
|
static int chroot_allow_open_directories = 1;
|
|
|
|
SYSCTL_INT(_kern, OID_AUTO, chroot_allow_open_directories, CTLFLAG_RW,
|
|
&chroot_allow_open_directories, 0, "");
|
|
|
|
/*
|
|
* Change notion of root (``/'') directory.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chroot_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
int
|
|
chroot(td, uap)
|
|
struct thread *td;
|
|
struct chroot_args /* {
|
|
char *path;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
|
|
error = suser_cred(td->td_ucred, SUSER_ALLOWJAIL);
|
|
if (error)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | MPSAFE | AUDITVNODE1,
|
|
UIO_USERSPACE, uap->path, td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
goto error;
|
|
vfslocked = NDHASGIANT(&nd);
|
|
if ((error = change_dir(nd.ni_vp, td)) != 0)
|
|
goto e_vunlock;
|
|
#ifdef MAC
|
|
if ((error = mac_check_vnode_chroot(td->td_ucred, nd.ni_vp)))
|
|
goto e_vunlock;
|
|
#endif
|
|
VOP_UNLOCK(nd.ni_vp, 0, td);
|
|
error = change_root(nd.ni_vp, td);
|
|
vrele(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
return (error);
|
|
e_vunlock:
|
|
vput(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
error:
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common routine for chroot and chdir. Callers must provide a locked vnode
|
|
* instance.
|
|
*/
|
|
int
|
|
change_dir(vp, td)
|
|
struct vnode *vp;
|
|
struct thread *td;
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "change_dir(): vp not locked");
|
|
if (vp->v_type != VDIR)
|
|
return (ENOTDIR);
|
|
#ifdef MAC
|
|
error = mac_check_vnode_chdir(td->td_ucred, vp);
|
|
if (error)
|
|
return (error);
|
|
#endif
|
|
error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common routine for kern_chroot() and jail_attach(). The caller is
|
|
* responsible for invoking suser() and mac_check_chroot() to authorize this
|
|
* operation.
|
|
*/
|
|
int
|
|
change_root(vp, td)
|
|
struct vnode *vp;
|
|
struct thread *td;
|
|
{
|
|
struct filedesc *fdp;
|
|
struct vnode *oldvp;
|
|
int vfslocked;
|
|
int error;
|
|
|
|
VFS_ASSERT_GIANT(vp->v_mount);
|
|
fdp = td->td_proc->p_fd;
|
|
FILEDESC_LOCK(fdp);
|
|
if (chroot_allow_open_directories == 0 ||
|
|
(chroot_allow_open_directories == 1 && fdp->fd_rdir != rootvnode)) {
|
|
error = chroot_refuse_vdir_fds(fdp);
|
|
if (error) {
|
|
FILEDESC_UNLOCK(fdp);
|
|
return (error);
|
|
}
|
|
}
|
|
oldvp = fdp->fd_rdir;
|
|
fdp->fd_rdir = vp;
|
|
VREF(fdp->fd_rdir);
|
|
if (!fdp->fd_jdir) {
|
|
fdp->fd_jdir = vp;
|
|
VREF(fdp->fd_jdir);
|
|
}
|
|
FILEDESC_UNLOCK(fdp);
|
|
vfslocked = VFS_LOCK_GIANT(oldvp->v_mount);
|
|
vrele(oldvp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Check permissions, allocate an open file structure,
|
|
* and call the device open routine if any.
|
|
*
|
|
* MP SAFE
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct open_args {
|
|
char *path;
|
|
int flags;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
open(td, uap)
|
|
struct thread *td;
|
|
register struct open_args /* {
|
|
char *path;
|
|
int flags;
|
|
int mode;
|
|
} */ *uap;
|
|
{
|
|
|
|
return kern_open(td, uap->path, UIO_USERSPACE, uap->flags, uap->mode);
|
|
}
|
|
|
|
int
|
|
kern_open(struct thread *td, char *path, enum uio_seg pathseg, int flags,
|
|
int mode)
|
|
{
|
|
struct proc *p = td->td_proc;
|
|
struct filedesc *fdp = p->p_fd;
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
struct vattr vat;
|
|
struct mount *mp;
|
|
int cmode;
|
|
struct file *nfp;
|
|
int type, indx, error;
|
|
struct flock lf;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
|
|
AUDIT_ARG(fflags, flags);
|
|
AUDIT_ARG(mode, mode);
|
|
if ((flags & O_ACCMODE) == O_ACCMODE)
|
|
return (EINVAL);
|
|
flags = FFLAGS(flags);
|
|
error = falloc(td, &nfp, &indx);
|
|
if (error)
|
|
return (error);
|
|
/* An extra reference on `nfp' has been held for us by falloc(). */
|
|
fp = nfp;
|
|
cmode = ((mode &~ fdp->fd_cmask) & ALLPERMS) &~ S_ISTXT;
|
|
NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNODE1 | MPSAFE, pathseg, path, td);
|
|
td->td_dupfd = -1; /* XXX check for fdopen */
|
|
error = vn_open(&nd, &flags, cmode, indx);
|
|
if (error) {
|
|
/*
|
|
* 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) {
|
|
fdrop(fp, td);
|
|
td->td_retval[0] = indx;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* release our own reference
|
|
*/
|
|
fdrop(fp, td);
|
|
|
|
/*
|
|
* handle special fdopen() case. bleh. dupfdopen() is
|
|
* responsible for dropping the old contents of ofiles[indx]
|
|
* if it succeeds.
|
|
*/
|
|
if ((error == ENODEV || error == ENXIO) &&
|
|
td->td_dupfd >= 0 && /* XXX from fdopen */
|
|
(error =
|
|
dupfdopen(td, fdp, indx, td->td_dupfd, flags, error)) == 0) {
|
|
td->td_retval[0] = indx;
|
|
return (0);
|
|
}
|
|
/*
|
|
* Clean up the descriptor, but only if another thread hadn't
|
|
* replaced or closed it.
|
|
*/
|
|
fdclose(fdp, fp, indx, td);
|
|
|
|
if (error == ERESTART)
|
|
error = EINTR;
|
|
return (error);
|
|
}
|
|
td->td_dupfd = 0;
|
|
vfslocked = NDHASGIANT(&nd);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vp = nd.ni_vp;
|
|
|
|
/*
|
|
* There should be 2 references on the file, one from the descriptor
|
|
* table, and one for us.
|
|
*
|
|
* Handle the case where someone closed the file (via its file
|
|
* descriptor) while we were blocked. The end result should look
|
|
* like opening the file succeeded but it was immediately closed.
|
|
* We call vn_close() manually because we haven't yet hooked up
|
|
* the various 'struct file' fields.
|
|
*/
|
|
FILEDESC_LOCK(fdp);
|
|
FILE_LOCK(fp);
|
|
if (fp->f_count == 1) {
|
|
mp = vp->v_mount;
|
|
KASSERT(fdp->fd_ofiles[indx] != fp,
|
|
("Open file descriptor lost all refs"));
|
|
FILE_UNLOCK(fp);
|
|
FILEDESC_UNLOCK(fdp);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vn_close(vp, flags & FMASK, fp->f_cred, td);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
fdrop(fp, td);
|
|
td->td_retval[0] = indx;
|
|
return (0);
|
|
}
|
|
fp->f_vnode = vp;
|
|
if (fp->f_data == NULL)
|
|
fp->f_data = vp;
|
|
fp->f_flag = flags & FMASK;
|
|
if (fp->f_ops == &badfileops)
|
|
fp->f_ops = &vnops;
|
|
fp->f_seqcount = 1;
|
|
fp->f_type = (vp->v_type == VFIFO ? DTYPE_FIFO : DTYPE_VNODE);
|
|
FILE_UNLOCK(fp);
|
|
FILEDESC_UNLOCK(fdp);
|
|
|
|
VOP_UNLOCK(vp, 0, td);
|
|
if (flags & (O_EXLOCK | O_SHLOCK)) {
|
|
lf.l_whence = SEEK_SET;
|
|
lf.l_start = 0;
|
|
lf.l_len = 0;
|
|
if (flags & O_EXLOCK)
|
|
lf.l_type = F_WRLCK;
|
|
else
|
|
lf.l_type = F_RDLCK;
|
|
type = F_FLOCK;
|
|
if ((flags & FNONBLOCK) == 0)
|
|
type |= F_WAIT;
|
|
if ((error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf,
|
|
type)) != 0)
|
|
goto bad;
|
|
fp->f_flag |= FHASLOCK;
|
|
}
|
|
if (flags & O_TRUNC) {
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
|
|
goto bad;
|
|
VOP_LEASE(vp, td, td->td_ucred, LEASE_WRITE);
|
|
VATTR_NULL(&vat);
|
|
vat.va_size = 0;
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
#ifdef MAC
|
|
error = mac_check_vnode_write(td->td_ucred, fp->f_cred, vp);
|
|
if (error == 0)
|
|
#endif
|
|
error = VOP_SETATTR(vp, &vat, td->td_ucred, td);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vn_finished_write(mp);
|
|
if (error)
|
|
goto bad;
|
|
}
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
/*
|
|
* Release our private reference, leaving the one associated with
|
|
* the descriptor table intact.
|
|
*/
|
|
fdrop(fp, td);
|
|
td->td_retval[0] = indx;
|
|
return (0);
|
|
bad:
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
fdclose(fdp, fp, indx, td);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
#ifdef COMPAT_43
|
|
/*
|
|
* Create a file.
|
|
*
|
|
* MP SAFE
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ocreat_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
ocreat(td, uap)
|
|
struct thread *td;
|
|
register struct ocreat_args /* {
|
|
char *path;
|
|
int mode;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_open(td, uap->path, UIO_USERSPACE,
|
|
O_WRONLY | O_CREAT | O_TRUNC, uap->mode));
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
/*
|
|
* Create a special file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mknod_args {
|
|
char *path;
|
|
int mode;
|
|
int dev;
|
|
};
|
|
#endif
|
|
int
|
|
mknod(td, uap)
|
|
struct thread *td;
|
|
register struct mknod_args /* {
|
|
char *path;
|
|
int mode;
|
|
int dev;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_mknod(td, uap->path, UIO_USERSPACE, uap->mode, uap->dev));
|
|
}
|
|
|
|
int
|
|
kern_mknod(struct thread *td, char *path, enum uio_seg pathseg, int mode,
|
|
int dev)
|
|
{
|
|
struct vnode *vp;
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
int error;
|
|
int whiteout = 0;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
|
|
AUDIT_ARG(mode, mode);
|
|
AUDIT_ARG(dev, dev);
|
|
switch (mode & S_IFMT) {
|
|
case S_IFCHR:
|
|
case S_IFBLK:
|
|
error = suser(td);
|
|
break;
|
|
default:
|
|
error = suser_cred(td->td_ucred, SUSER_ALLOWJAIL);
|
|
break;
|
|
}
|
|
if (error)
|
|
return (error);
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT(&nd, CREATE, LOCKPARENT | SAVENAME | MPSAFE | AUDITVNODE1,
|
|
pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
vp = nd.ni_vp;
|
|
if (vp != NULL) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (vp == nd.ni_dvp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (EEXIST);
|
|
} else {
|
|
VATTR_NULL(&vattr);
|
|
FILEDESC_LOCK_FAST(td->td_proc->p_fd);
|
|
vattr.va_mode = (mode & ALLPERMS) &
|
|
~td->td_proc->p_fd->fd_cmask;
|
|
FILEDESC_UNLOCK_FAST(td->td_proc->p_fd);
|
|
vattr.va_rdev = dev;
|
|
whiteout = 0;
|
|
|
|
switch (mode & S_IFMT) {
|
|
case S_IFMT: /* used by badsect to flag bad sectors */
|
|
vattr.va_type = VBAD;
|
|
break;
|
|
case S_IFCHR:
|
|
vattr.va_type = VCHR;
|
|
break;
|
|
case S_IFBLK:
|
|
vattr.va_type = VBLK;
|
|
break;
|
|
case S_IFWHT:
|
|
whiteout = 1;
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
}
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
#ifdef MAC
|
|
if (error == 0 && !whiteout)
|
|
error = mac_check_vnode_create(td->td_ucred, nd.ni_dvp,
|
|
&nd.ni_cnd, &vattr);
|
|
#endif
|
|
if (!error) {
|
|
VOP_LEASE(nd.ni_dvp, td, td->td_ucred, LEASE_WRITE);
|
|
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);
|
|
if (error == 0)
|
|
vput(nd.ni_vp);
|
|
}
|
|
}
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
vn_finished_write(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Create a named pipe.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mkfifo_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
mkfifo(td, uap)
|
|
struct thread *td;
|
|
register struct mkfifo_args /* {
|
|
char *path;
|
|
int mode;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_mkfifo(td, uap->path, UIO_USERSPACE, uap->mode));
|
|
}
|
|
|
|
int
|
|
kern_mkfifo(struct thread *td, char *path, enum uio_seg pathseg, int mode)
|
|
{
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
|
|
AUDIT_ARG(mode, mode);
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT(&nd, CREATE, LOCKPARENT | SAVENAME | MPSAFE | AUDITVNODE1,
|
|
pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
if (nd.ni_vp != NULL) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (nd.ni_vp == nd.ni_dvp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (EEXIST);
|
|
}
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_type = VFIFO;
|
|
FILEDESC_LOCK_FAST(td->td_proc->p_fd);
|
|
vattr.va_mode = (mode & ALLPERMS) & ~td->td_proc->p_fd->fd_cmask;
|
|
FILEDESC_UNLOCK_FAST(td->td_proc->p_fd);
|
|
#ifdef MAC
|
|
error = mac_check_vnode_create(td->td_ucred, nd.ni_dvp, &nd.ni_cnd,
|
|
&vattr);
|
|
if (error)
|
|
goto out;
|
|
#endif
|
|
VOP_LEASE(nd.ni_dvp, td, td->td_ucred, LEASE_WRITE);
|
|
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
|
|
if (error == 0)
|
|
vput(nd.ni_vp);
|
|
#ifdef MAC
|
|
out:
|
|
#endif
|
|
vput(nd.ni_dvp);
|
|
vn_finished_write(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a hard file link.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct link_args {
|
|
char *path;
|
|
char *link;
|
|
};
|
|
#endif
|
|
int
|
|
link(td, uap)
|
|
struct thread *td;
|
|
register struct link_args /* {
|
|
char *path;
|
|
char *link;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
|
|
error = kern_link(td, uap->path, uap->link, UIO_USERSPACE);
|
|
return (error);
|
|
}
|
|
|
|
static 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 thread *td, struct ucred *cred)
|
|
{
|
|
struct vattr va;
|
|
int error;
|
|
|
|
if (suser_cred(cred, SUSER_ALLOWJAIL) == 0)
|
|
return (0);
|
|
|
|
if (!hardlink_check_uid && !hardlink_check_gid)
|
|
return (0);
|
|
|
|
error = VOP_GETATTR(vp, &va, cred, td);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
if (hardlink_check_uid) {
|
|
if (cred->cr_uid != va.va_uid)
|
|
return (EPERM);
|
|
}
|
|
|
|
if (hardlink_check_gid) {
|
|
if (!groupmember(va.va_gid, cred))
|
|
return (EPERM);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
kern_link(struct thread *td, char *path, char *link, enum uio_seg segflg)
|
|
{
|
|
struct vnode *vp;
|
|
struct mount *mp;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
int lvfslocked;
|
|
int error;
|
|
|
|
bwillwrite();
|
|
NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE | AUDITVNODE1, segflg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type == VDIR) {
|
|
vrele(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (EPERM); /* POSIX */
|
|
}
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0) {
|
|
vrele(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
NDINIT(&nd, CREATE, LOCKPARENT | SAVENAME | MPSAFE | AUDITVNODE2,
|
|
segflg, link, td);
|
|
if ((error = namei(&nd)) == 0) {
|
|
lvfslocked = NDHASGIANT(&nd);
|
|
if (nd.ni_vp != NULL) {
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(nd.ni_vp);
|
|
error = EEXIST;
|
|
} else if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td))
|
|
== 0) {
|
|
VOP_LEASE(nd.ni_dvp, td, td->td_ucred, LEASE_WRITE);
|
|
VOP_LEASE(vp, td, td->td_ucred, LEASE_WRITE);
|
|
error = can_hardlink(vp, td, td->td_ucred);
|
|
if (error == 0)
|
|
#ifdef MAC
|
|
error = mac_check_vnode_link(td->td_ucred,
|
|
nd.ni_dvp, vp, &nd.ni_cnd);
|
|
if (error == 0)
|
|
#endif
|
|
error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vput(nd.ni_dvp);
|
|
}
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
VFS_UNLOCK_GIANT(lvfslocked);
|
|
}
|
|
vrele(vp);
|
|
vn_finished_write(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a symbolic link.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct symlink_args {
|
|
char *path;
|
|
char *link;
|
|
};
|
|
#endif
|
|
int
|
|
symlink(td, uap)
|
|
struct thread *td;
|
|
register struct symlink_args /* {
|
|
char *path;
|
|
char *link;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_symlink(td, uap->path, uap->link, UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_symlink(struct thread *td, char *path, char *link, enum uio_seg segflg)
|
|
{
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
char *syspath;
|
|
int error;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
|
|
if (segflg == UIO_SYSSPACE) {
|
|
syspath = path;
|
|
} else {
|
|
syspath = uma_zalloc(namei_zone, M_WAITOK);
|
|
if ((error = copyinstr(path, syspath, MAXPATHLEN, NULL)) != 0)
|
|
goto out;
|
|
}
|
|
AUDIT_ARG(text, syspath);
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT(&nd, CREATE, LOCKPARENT | SAVENAME | MPSAFE | AUDITVNODE1,
|
|
segflg, link, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
goto out;
|
|
vfslocked = NDHASGIANT(&nd);
|
|
if (nd.ni_vp) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (nd.ni_vp == nd.ni_dvp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
error = EEXIST;
|
|
goto out;
|
|
}
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0)
|
|
goto out;
|
|
goto restart;
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
FILEDESC_LOCK_FAST(td->td_proc->p_fd);
|
|
vattr.va_mode = ACCESSPERMS &~ td->td_proc->p_fd->fd_cmask;
|
|
FILEDESC_UNLOCK_FAST(td->td_proc->p_fd);
|
|
#ifdef MAC
|
|
vattr.va_type = VLNK;
|
|
error = mac_check_vnode_create(td->td_ucred, nd.ni_dvp, &nd.ni_cnd,
|
|
&vattr);
|
|
if (error)
|
|
goto out2;
|
|
#endif
|
|
VOP_LEASE(nd.ni_dvp, td, td->td_ucred, LEASE_WRITE);
|
|
error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, syspath);
|
|
if (error == 0)
|
|
vput(nd.ni_vp);
|
|
#ifdef MAC
|
|
out2:
|
|
#endif
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
vn_finished_write(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
out:
|
|
if (segflg != UIO_SYSSPACE)
|
|
uma_zfree(namei_zone, syspath);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Delete a whiteout from the filesystem.
|
|
*/
|
|
int
|
|
undelete(td, uap)
|
|
struct thread *td;
|
|
register struct undelete_args /* {
|
|
char *path;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct mount *mp;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT(&nd, DELETE, LOCKPARENT | DOWHITEOUT | MPSAFE | AUDITVNODE1,
|
|
UIO_USERSPACE, uap->path, td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
|
|
if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & ISWHITEOUT)) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (nd.ni_vp == nd.ni_dvp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
if (nd.ni_vp)
|
|
vrele(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (EEXIST);
|
|
}
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
VOP_LEASE(nd.ni_dvp, td, td->td_ucred, LEASE_WRITE);
|
|
error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, DELETE);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
vn_finished_write(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Delete a name from the filesystem.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct unlink_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
int
|
|
unlink(td, uap)
|
|
struct thread *td;
|
|
struct unlink_args /* {
|
|
char *path;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
|
|
error = kern_unlink(td, uap->path, UIO_USERSPACE);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_unlink(struct thread *td, char *path, enum uio_seg pathseg)
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
int error;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF | MPSAFE | AUDITVNODE1,
|
|
pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error == EINVAL ? EPERM : error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type == VDIR)
|
|
error = EPERM; /* POSIX */
|
|
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(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
if (vp == nd.ni_dvp)
|
|
vrele(vp);
|
|
else
|
|
vput(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
if ((error = vn_start_write(NULL, &mp,
|
|
V_XSLEEP | PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
#ifdef MAC
|
|
error = mac_check_vnode_delete(td->td_ucred, nd.ni_dvp, vp,
|
|
&nd.ni_cnd);
|
|
if (error)
|
|
goto out;
|
|
#endif
|
|
VOP_LEASE(nd.ni_dvp, td, td->td_ucred, LEASE_WRITE);
|
|
error = VOP_REMOVE(nd.ni_dvp, vp, &nd.ni_cnd);
|
|
#ifdef MAC
|
|
out:
|
|
#endif
|
|
vn_finished_write(mp);
|
|
}
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
if (vp == nd.ni_dvp)
|
|
vrele(vp);
|
|
else
|
|
vput(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
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
|
|
lseek(td, uap)
|
|
struct thread *td;
|
|
register struct lseek_args /* {
|
|
int fd;
|
|
int pad;
|
|
off_t offset;
|
|
int whence;
|
|
} */ *uap;
|
|
{
|
|
struct ucred *cred = td->td_ucred;
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
struct vattr vattr;
|
|
off_t offset;
|
|
int error, noneg;
|
|
int vfslocked;
|
|
|
|
if ((error = fget(td, uap->fd, &fp)) != 0)
|
|
return (error);
|
|
if (!(fp->f_ops->fo_flags & DFLAG_SEEKABLE)) {
|
|
fdrop(fp, td);
|
|
return (ESPIPE);
|
|
}
|
|
vp = fp->f_vnode;
|
|
vfslocked = VFS_LOCK_GIANT(vp->v_mount);
|
|
noneg = (vp->v_type != VCHR);
|
|
offset = uap->offset;
|
|
switch (uap->whence) {
|
|
case L_INCR:
|
|
if (noneg &&
|
|
(fp->f_offset < 0 ||
|
|
(offset > 0 && fp->f_offset > OFF_MAX - offset))) {
|
|
error = EOVERFLOW;
|
|
break;
|
|
}
|
|
offset += fp->f_offset;
|
|
break;
|
|
case L_XTND:
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
error = VOP_GETATTR(vp, &vattr, cred, td);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
if (error)
|
|
break;
|
|
if (noneg &&
|
|
(vattr.va_size > OFF_MAX ||
|
|
(offset > 0 && vattr.va_size > OFF_MAX - offset))) {
|
|
error = EOVERFLOW;
|
|
break;
|
|
}
|
|
offset += vattr.va_size;
|
|
break;
|
|
case L_SET:
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
}
|
|
if (error == 0 && noneg && offset < 0)
|
|
error = EINVAL;
|
|
if (error != 0)
|
|
goto drop;
|
|
fp->f_offset = offset;
|
|
*(off_t *)(td->td_retval) = fp->f_offset;
|
|
drop:
|
|
fdrop(fp, td);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
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(td, uap)
|
|
struct thread *td;
|
|
register struct olseek_args /* {
|
|
int fd;
|
|
long offset;
|
|
int whence;
|
|
} */ *uap;
|
|
{
|
|
struct lseek_args /* {
|
|
int fd;
|
|
int pad;
|
|
off_t offset;
|
|
int whence;
|
|
} */ nuap;
|
|
int error;
|
|
|
|
nuap.fd = uap->fd;
|
|
nuap.offset = uap->offset;
|
|
nuap.whence = uap->whence;
|
|
error = lseek(td, &nuap);
|
|
return (error);
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
/*
|
|
* Check access permissions using passed credentials.
|
|
*/
|
|
static int
|
|
vn_access(vp, user_flags, cred, td)
|
|
struct vnode *vp;
|
|
int user_flags;
|
|
struct ucred *cred;
|
|
struct thread *td;
|
|
{
|
|
int error, flags;
|
|
|
|
/* Flags == 0 means only check for existence. */
|
|
error = 0;
|
|
if (user_flags) {
|
|
flags = 0;
|
|
if (user_flags & R_OK)
|
|
flags |= VREAD;
|
|
if (user_flags & W_OK)
|
|
flags |= VWRITE;
|
|
if (user_flags & X_OK)
|
|
flags |= VEXEC;
|
|
#ifdef MAC
|
|
error = mac_check_vnode_access(cred, vp, flags);
|
|
if (error)
|
|
return (error);
|
|
#endif
|
|
if ((flags & VWRITE) == 0 || (error = vn_writechk(vp)) == 0)
|
|
error = VOP_ACCESS(vp, flags, cred, td);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check access permissions using "real" credentials.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct access_args {
|
|
char *path;
|
|
int flags;
|
|
};
|
|
#endif
|
|
int
|
|
access(td, uap)
|
|
struct thread *td;
|
|
register struct access_args /* {
|
|
char *path;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_access(td, uap->path, UIO_USERSPACE, uap->flags));
|
|
}
|
|
|
|
int
|
|
kern_access(struct thread *td, char *path, enum uio_seg pathseg, int flags)
|
|
{
|
|
struct ucred *cred, *tmpcred;
|
|
register struct vnode *vp;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
int error;
|
|
|
|
/*
|
|
* Create and modify a temporary credential instead of one that
|
|
* is potentially shared. This could also mess up socket
|
|
* buffer accounting which can run in an interrupt context.
|
|
*/
|
|
cred = td->td_ucred;
|
|
tmpcred = crdup(cred);
|
|
tmpcred->cr_uid = cred->cr_ruid;
|
|
tmpcred->cr_groups[0] = cred->cr_rgid;
|
|
td->td_ucred = tmpcred;
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | MPSAFE | AUDITVNODE1,
|
|
pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
goto out1;
|
|
vfslocked = NDHASGIANT(&nd);
|
|
vp = nd.ni_vp;
|
|
|
|
error = vn_access(vp, flags, tmpcred, td);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
out1:
|
|
td->td_ucred = cred;
|
|
crfree(tmpcred);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check access permissions using "effective" credentials.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct eaccess_args {
|
|
char *path;
|
|
int flags;
|
|
};
|
|
#endif
|
|
int
|
|
eaccess(td, uap)
|
|
struct thread *td;
|
|
register struct eaccess_args /* {
|
|
char *path;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_eaccess(td, uap->path, UIO_USERSPACE, uap->flags));
|
|
}
|
|
|
|
int
|
|
kern_eaccess(struct thread *td, char *path, enum uio_seg pathseg, int flags)
|
|
{
|
|
struct nameidata nd;
|
|
struct vnode *vp;
|
|
int vfslocked;
|
|
int error;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | MPSAFE | AUDITVNODE1,
|
|
pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
vfslocked = NDHASGIANT(&nd);
|
|
error = vn_access(vp, flags, td->td_ucred, td);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
#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(td, uap)
|
|
struct thread *td;
|
|
register struct ostat_args /* {
|
|
char *path;
|
|
struct ostat *ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
struct ostat osb;
|
|
int error;
|
|
|
|
error = kern_stat(td, uap->path, UIO_USERSPACE, &sb);
|
|
if (error)
|
|
return (error);
|
|
cvtstat(&sb, &osb);
|
|
error = copyout(&osb, uap->ub, sizeof (osb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get file status; this version does not follow links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct olstat_args {
|
|
char *path;
|
|
struct ostat *ub;
|
|
};
|
|
#endif
|
|
int
|
|
olstat(td, uap)
|
|
struct thread *td;
|
|
register struct olstat_args /* {
|
|
char *path;
|
|
struct ostat *ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
struct ostat osb;
|
|
int error;
|
|
|
|
error = kern_lstat(td, uap->path, UIO_USERSPACE, &sb);
|
|
if (error)
|
|
return (error);
|
|
cvtstat(&sb, &osb);
|
|
error = copyout(&osb, uap->ub, sizeof (osb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Convert from an old to a new stat structure.
|
|
*/
|
|
void
|
|
cvtstat(st, ost)
|
|
struct stat *st;
|
|
struct ostat *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;
|
|
if (st->st_size < (quad_t)1 << 32)
|
|
ost->st_size = st->st_size;
|
|
else
|
|
ost->st_size = -2;
|
|
ost->st_atime = st->st_atime;
|
|
ost->st_mtime = st->st_mtime;
|
|
ost->st_ctime = st->st_ctime;
|
|
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 */
|
|
|
|
/*
|
|
* Get file status; this version follows links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct stat_args {
|
|
char *path;
|
|
struct stat *ub;
|
|
};
|
|
#endif
|
|
int
|
|
stat(td, uap)
|
|
struct thread *td;
|
|
register struct stat_args /* {
|
|
char *path;
|
|
struct stat *ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
int error;
|
|
|
|
error = kern_stat(td, uap->path, UIO_USERSPACE, &sb);
|
|
if (error == 0)
|
|
error = copyout(&sb, uap->ub, sizeof (sb));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_stat(struct thread *td, char *path, enum uio_seg pathseg, struct stat *sbp)
|
|
{
|
|
struct nameidata nd;
|
|
struct stat sb;
|
|
int error, vfslocked;
|
|
|
|
NDINIT(&nd, LOOKUP,
|
|
FOLLOW | LOCKSHARED | LOCKLEAF | MPSAFE | AUDITVNODE1,
|
|
pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
error = vn_stat(nd.ni_vp, &sb, td->td_ucred, NOCRED, td);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
if (mtx_owned(&Giant))
|
|
printf("stat(%d): %s\n", vfslocked, path);
|
|
if (error)
|
|
return (error);
|
|
*sbp = sb;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Get file status; this version does not follow links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lstat_args {
|
|
char *path;
|
|
struct stat *ub;
|
|
};
|
|
#endif
|
|
int
|
|
lstat(td, uap)
|
|
struct thread *td;
|
|
register struct lstat_args /* {
|
|
char *path;
|
|
struct stat *ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
int error;
|
|
|
|
error = kern_lstat(td, uap->path, UIO_USERSPACE, &sb);
|
|
if (error == 0)
|
|
error = copyout(&sb, uap->ub, sizeof (sb));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_lstat(struct thread *td, char *path, enum uio_seg pathseg, struct stat *sbp)
|
|
{
|
|
struct vnode *vp;
|
|
struct stat sb;
|
|
struct nameidata nd;
|
|
int error, vfslocked;
|
|
|
|
NDINIT(&nd, LOOKUP,
|
|
NOFOLLOW | LOCKLEAF | LOCKSHARED | MPSAFE | AUDITVNODE1,
|
|
pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
vp = nd.ni_vp;
|
|
error = vn_stat(vp, &sb, td->td_ucred, NOCRED, td);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
if (error)
|
|
return (error);
|
|
*sbp = sb;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Implementation of the NetBSD [l]stat() functions.
|
|
*/
|
|
void
|
|
cvtnstat(sb, nsb)
|
|
struct stat *sb;
|
|
struct nstat *nsb;
|
|
{
|
|
bzero(nsb, sizeof *nsb);
|
|
nsb->st_dev = sb->st_dev;
|
|
nsb->st_ino = sb->st_ino;
|
|
nsb->st_mode = sb->st_mode;
|
|
nsb->st_nlink = sb->st_nlink;
|
|
nsb->st_uid = sb->st_uid;
|
|
nsb->st_gid = sb->st_gid;
|
|
nsb->st_rdev = sb->st_rdev;
|
|
nsb->st_atimespec = sb->st_atimespec;
|
|
nsb->st_mtimespec = sb->st_mtimespec;
|
|
nsb->st_ctimespec = sb->st_ctimespec;
|
|
nsb->st_size = sb->st_size;
|
|
nsb->st_blocks = sb->st_blocks;
|
|
nsb->st_blksize = sb->st_blksize;
|
|
nsb->st_flags = sb->st_flags;
|
|
nsb->st_gen = sb->st_gen;
|
|
nsb->st_birthtimespec = sb->st_birthtimespec;
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct nstat_args {
|
|
char *path;
|
|
struct nstat *ub;
|
|
};
|
|
#endif
|
|
int
|
|
nstat(td, uap)
|
|
struct thread *td;
|
|
register struct nstat_args /* {
|
|
char *path;
|
|
struct nstat *ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
struct nstat nsb;
|
|
int error;
|
|
|
|
error = kern_stat(td, uap->path, UIO_USERSPACE, &sb);
|
|
if (error)
|
|
return (error);
|
|
cvtnstat(&sb, &nsb);
|
|
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 lstat_args {
|
|
char *path;
|
|
struct stat *ub;
|
|
};
|
|
#endif
|
|
int
|
|
nlstat(td, uap)
|
|
struct thread *td;
|
|
register struct nlstat_args /* {
|
|
char *path;
|
|
struct nstat *ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
struct nstat nsb;
|
|
int error;
|
|
|
|
error = kern_lstat(td, uap->path, UIO_USERSPACE, &sb);
|
|
if (error)
|
|
return (error);
|
|
cvtnstat(&sb, &nsb);
|
|
error = copyout(&nsb, uap->ub, sizeof (nsb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get configurable pathname variables.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct pathconf_args {
|
|
char *path;
|
|
int name;
|
|
};
|
|
#endif
|
|
int
|
|
pathconf(td, uap)
|
|
struct thread *td;
|
|
register struct pathconf_args /* {
|
|
char *path;
|
|
int name;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_pathconf(td, uap->path, UIO_USERSPACE, uap->name));
|
|
}
|
|
|
|
int
|
|
kern_pathconf(struct thread *td, char *path, enum uio_seg pathseg, int name)
|
|
{
|
|
struct nameidata nd;
|
|
int error, vfslocked;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | MPSAFE | AUDITVNODE1,
|
|
pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
|
|
/* If asynchronous I/O is available, it works for all files. */
|
|
if (name == _PC_ASYNC_IO)
|
|
td->td_retval[0] = async_io_version;
|
|
else
|
|
error = VOP_PATHCONF(nd.ni_vp, name, td->td_retval);
|
|
vput(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Return target name of a symbolic link.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct readlink_args {
|
|
char *path;
|
|
char *buf;
|
|
int count;
|
|
};
|
|
#endif
|
|
int
|
|
readlink(td, uap)
|
|
struct thread *td;
|
|
register struct readlink_args /* {
|
|
char *path;
|
|
char *buf;
|
|
int count;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_readlink(td, uap->path, UIO_USERSPACE, uap->buf,
|
|
UIO_USERSPACE, uap->count));
|
|
}
|
|
|
|
int
|
|
kern_readlink(struct thread *td, char *path, enum uio_seg pathseg, char *buf,
|
|
enum uio_seg bufseg, int count)
|
|
{
|
|
register struct vnode *vp;
|
|
struct iovec aiov;
|
|
struct uio auio;
|
|
int error;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | MPSAFE | AUDITVNODE1,
|
|
pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
vp = nd.ni_vp;
|
|
#ifdef MAC
|
|
error = mac_check_vnode_readlink(td->td_ucred, vp);
|
|
if (error) {
|
|
vput(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
#endif
|
|
if (vp->v_type != VLNK)
|
|
error = EINVAL;
|
|
else {
|
|
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);
|
|
}
|
|
vput(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
td->td_retval[0] = count - auio.uio_resid;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common implementation code for chflags() and fchflags().
|
|
*/
|
|
static int
|
|
setfflags(td, vp, flags)
|
|
struct thread *td;
|
|
struct vnode *vp;
|
|
int flags;
|
|
{
|
|
int error;
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
|
|
/*
|
|
* 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 = suser_cred(td->td_ucred, SUSER_ALLOWJAIL);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
|
|
return (error);
|
|
VOP_LEASE(vp, td, td->td_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_flags = flags;
|
|
#ifdef MAC
|
|
error = mac_check_vnode_setflags(td->td_ucred, vp, vattr.va_flags);
|
|
if (error == 0)
|
|
#endif
|
|
error = VOP_SETATTR(vp, &vattr, td->td_ucred, td);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change flags of a file given a path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chflags_args {
|
|
char *path;
|
|
int flags;
|
|
};
|
|
#endif
|
|
int
|
|
chflags(td, uap)
|
|
struct thread *td;
|
|
register struct chflags_args /* {
|
|
char *path;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
|
|
AUDIT_ARG(fflags, uap->flags);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE | AUDITVNODE1, UIO_USERSPACE,
|
|
uap->path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
error = setfflags(td, nd.ni_vp, uap->flags);
|
|
vrele(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Same as chflags() but doesn't follow symlinks.
|
|
*/
|
|
int
|
|
lchflags(td, uap)
|
|
struct thread *td;
|
|
register struct lchflags_args /* {
|
|
char *path;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
|
|
AUDIT_ARG(fflags, uap->flags);
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | MPSAFE | AUDITVNODE1, UIO_USERSPACE,
|
|
uap->path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = setfflags(td, nd.ni_vp, uap->flags);
|
|
vrele(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change flags of a file given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchflags_args {
|
|
int fd;
|
|
int flags;
|
|
};
|
|
#endif
|
|
int
|
|
fchflags(td, uap)
|
|
struct thread *td;
|
|
register struct fchflags_args /* {
|
|
int fd;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
int vfslocked;
|
|
int error;
|
|
|
|
AUDIT_ARG(fd, uap->fd);
|
|
AUDIT_ARG(fflags, uap->flags);
|
|
if ((error = getvnode(td->td_proc->p_fd, uap->fd, &fp)) != 0)
|
|
return (error);
|
|
vfslocked = VFS_LOCK_GIANT(fp->f_vnode->v_mount);
|
|
#ifdef AUDIT
|
|
vn_lock(fp->f_vnode, LK_EXCLUSIVE | LK_RETRY, td);
|
|
AUDIT_ARG(vnode, fp->f_vnode, ARG_VNODE1);
|
|
VOP_UNLOCK(fp->f_vnode, 0, td);
|
|
#endif
|
|
error = setfflags(td, fp->f_vnode, uap->flags);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common implementation code for chmod(), lchmod() and fchmod().
|
|
*/
|
|
static int
|
|
setfmode(td, vp, mode)
|
|
struct thread *td;
|
|
struct vnode *vp;
|
|
int mode;
|
|
{
|
|
int error;
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
|
|
return (error);
|
|
VOP_LEASE(vp, td, td->td_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = mode & ALLPERMS;
|
|
#ifdef MAC
|
|
error = mac_check_vnode_setmode(td->td_ucred, vp, vattr.va_mode);
|
|
if (error == 0)
|
|
#endif
|
|
error = VOP_SETATTR(vp, &vattr, td->td_ucred, td);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
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
|
|
chmod(td, uap)
|
|
struct thread *td;
|
|
register struct chmod_args /* {
|
|
char *path;
|
|
int mode;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_chmod(td, uap->path, UIO_USERSPACE, uap->mode));
|
|
}
|
|
|
|
int
|
|
kern_chmod(struct thread *td, char *path, enum uio_seg pathseg, int mode)
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
|
|
AUDIT_ARG(mode, mode);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE | AUDITVNODE1, pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = setfmode(td, nd.ni_vp, mode);
|
|
vrele(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* 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
|
|
lchmod(td, uap)
|
|
struct thread *td;
|
|
register struct lchmod_args /* {
|
|
char *path;
|
|
int mode;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
|
|
AUDIT_ARG(mode, (mode_t)uap->mode);
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | MPSAFE | AUDITVNODE1, UIO_USERSPACE,
|
|
uap->path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = setfmode(td, nd.ni_vp, uap->mode);
|
|
vrele(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change mode of a file given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchmod_args {
|
|
int fd;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
fchmod(td, uap)
|
|
struct thread *td;
|
|
register struct fchmod_args /* {
|
|
int fd;
|
|
int mode;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
int vfslocked;
|
|
int error;
|
|
|
|
AUDIT_ARG(fd, uap->fd);
|
|
AUDIT_ARG(mode, uap->mode);
|
|
if ((error = getvnode(td->td_proc->p_fd, uap->fd, &fp)) != 0)
|
|
return (error);
|
|
vfslocked = VFS_LOCK_GIANT(fp->f_vnode->v_mount);
|
|
#ifdef AUDIT
|
|
vn_lock(fp->f_vnode, LK_EXCLUSIVE | LK_RETRY, td);
|
|
AUDIT_ARG(vnode, fp->f_vnode, ARG_VNODE1);
|
|
VOP_UNLOCK(fp->f_vnode, 0, td);
|
|
#endif
|
|
error = setfmode(td, fp->f_vnode, uap->mode);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common implementation for chown(), lchown(), and fchown()
|
|
*/
|
|
static int
|
|
setfown(td, vp, uid, gid)
|
|
struct thread *td;
|
|
struct vnode *vp;
|
|
uid_t uid;
|
|
gid_t gid;
|
|
{
|
|
int error;
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
|
|
return (error);
|
|
VOP_LEASE(vp, td, td->td_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_uid = uid;
|
|
vattr.va_gid = gid;
|
|
#ifdef MAC
|
|
error = mac_check_vnode_setowner(td->td_ucred, vp, vattr.va_uid,
|
|
vattr.va_gid);
|
|
if (error == 0)
|
|
#endif
|
|
error = VOP_SETATTR(vp, &vattr, td->td_ucred, td);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
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
|
|
chown(td, uap)
|
|
struct thread *td;
|
|
register struct chown_args /* {
|
|
char *path;
|
|
int uid;
|
|
int gid;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_chown(td, uap->path, UIO_USERSPACE, uap->uid, uap->gid));
|
|
}
|
|
|
|
int
|
|
kern_chown(struct thread *td, char *path, enum uio_seg pathseg, int uid,
|
|
int gid)
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
|
|
AUDIT_ARG(owner, uid, gid);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE | AUDITVNODE1, pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = setfown(td, nd.ni_vp, uid, gid);
|
|
vrele(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
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
|
|
lchown(td, uap)
|
|
struct thread *td;
|
|
register struct lchown_args /* {
|
|
char *path;
|
|
int uid;
|
|
int gid;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_lchown(td, uap->path, UIO_USERSPACE, uap->uid, uap->gid));
|
|
}
|
|
|
|
int
|
|
kern_lchown(struct thread *td, char *path, enum uio_seg pathseg, int uid,
|
|
int gid)
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
|
|
AUDIT_ARG(owner, uid, gid);
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | MPSAFE | AUDITVNODE1, pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = setfown(td, nd.ni_vp, uid, gid);
|
|
vrele(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchown_args {
|
|
int fd;
|
|
int uid;
|
|
int gid;
|
|
};
|
|
#endif
|
|
int
|
|
fchown(td, uap)
|
|
struct thread *td;
|
|
register struct fchown_args /* {
|
|
int fd;
|
|
int uid;
|
|
int gid;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
int vfslocked;
|
|
int error;
|
|
|
|
AUDIT_ARG(fd, uap->fd);
|
|
AUDIT_ARG(owner, uap->uid, uap->gid);
|
|
if ((error = getvnode(td->td_proc->p_fd, uap->fd, &fp)) != 0)
|
|
return (error);
|
|
vfslocked = VFS_LOCK_GIANT(fp->f_vnode->v_mount);
|
|
#ifdef AUDIT
|
|
vn_lock(fp->f_vnode, LK_EXCLUSIVE | LK_RETRY, td);
|
|
AUDIT_ARG(vnode, fp->f_vnode, ARG_VNODE1);
|
|
VOP_UNLOCK(fp->f_vnode, 0, td);
|
|
#endif
|
|
error = setfown(td, fp->f_vnode, uap->uid, uap->gid);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common implementation code for utimes(), lutimes(), and futimes().
|
|
*/
|
|
static int
|
|
getutimes(usrtvp, tvpseg, tsp)
|
|
const struct timeval *usrtvp;
|
|
enum uio_seg tvpseg;
|
|
struct timespec *tsp;
|
|
{
|
|
struct timeval tv[2];
|
|
const struct timeval *tvp;
|
|
int error;
|
|
|
|
if (usrtvp == NULL) {
|
|
microtime(&tv[0]);
|
|
TIMEVAL_TO_TIMESPEC(&tv[0], &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 utimes(), lutimes(), and futimes().
|
|
*/
|
|
static int
|
|
setutimes(td, vp, ts, numtimes, nullflag)
|
|
struct thread *td;
|
|
struct vnode *vp;
|
|
const struct timespec *ts;
|
|
int numtimes;
|
|
int nullflag;
|
|
{
|
|
int error, setbirthtime;
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
|
|
return (error);
|
|
VOP_LEASE(vp, td, td->td_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
setbirthtime = 0;
|
|
if (numtimes < 3 && VOP_GETATTR(vp, &vattr, td->td_ucred, td) == 0 &&
|
|
timespeccmp(&ts[1], &vattr.va_birthtime, < ))
|
|
setbirthtime = 1;
|
|
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_check_vnode_setutimes(td->td_ucred, vp, vattr.va_atime,
|
|
vattr.va_mtime);
|
|
#endif
|
|
if (error == 0)
|
|
error = VOP_SETATTR(vp, &vattr, td->td_ucred, td);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
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
|
|
utimes(td, uap)
|
|
struct thread *td;
|
|
register struct utimes_args /* {
|
|
char *path;
|
|
struct timeval *tptr;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_utimes(td, uap->path, UIO_USERSPACE, uap->tptr,
|
|
UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_utimes(struct thread *td, char *path, enum uio_seg pathseg,
|
|
struct timeval *tptr, enum uio_seg tptrseg)
|
|
{
|
|
struct timespec ts[2];
|
|
int error;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
|
|
if ((error = getutimes(tptr, tptrseg, ts)) != 0)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE | AUDITVNODE1, pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = setutimes(td, nd.ni_vp, ts, 2, tptr == NULL);
|
|
vrele(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
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
|
|
lutimes(td, uap)
|
|
struct thread *td;
|
|
register struct lutimes_args /* {
|
|
char *path;
|
|
struct timeval *tptr;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_lutimes(td, uap->path, UIO_USERSPACE, uap->tptr,
|
|
UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_lutimes(struct thread *td, char *path, enum uio_seg pathseg,
|
|
struct timeval *tptr, enum uio_seg tptrseg)
|
|
{
|
|
struct timespec ts[2];
|
|
int error;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
|
|
if ((error = getutimes(tptr, tptrseg, ts)) != 0)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | MPSAFE | AUDITVNODE1, pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = setutimes(td, nd.ni_vp, ts, 2, tptr == NULL);
|
|
vrele(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
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
|
|
futimes(td, uap)
|
|
struct thread *td;
|
|
register struct futimes_args /* {
|
|
int fd;
|
|
struct timeval *tptr;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_futimes(td, uap->fd, uap->tptr, UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_futimes(struct thread *td, int fd, struct timeval *tptr,
|
|
enum uio_seg tptrseg)
|
|
{
|
|
struct timespec ts[2];
|
|
struct file *fp;
|
|
int vfslocked;
|
|
int error;
|
|
|
|
AUDIT_ARG(fd, fd);
|
|
if ((error = getutimes(tptr, tptrseg, ts)) != 0)
|
|
return (error);
|
|
if ((error = getvnode(td->td_proc->p_fd, fd, &fp)) != 0)
|
|
return (error);
|
|
vfslocked = VFS_LOCK_GIANT(fp->f_vnode->v_mount);
|
|
#ifdef AUDIT
|
|
vn_lock(fp->f_vnode, LK_EXCLUSIVE | LK_RETRY, td);
|
|
AUDIT_ARG(vnode, fp->f_vnode, ARG_VNODE1);
|
|
VOP_UNLOCK(fp->f_vnode, 0, td);
|
|
#endif
|
|
error = setutimes(td, fp->f_vnode, ts, 2, tptr == NULL);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
fdrop(fp, td);
|
|
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
|
|
truncate(td, uap)
|
|
struct thread *td;
|
|
register struct truncate_args /* {
|
|
char *path;
|
|
int pad;
|
|
off_t length;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_truncate(td, uap->path, UIO_USERSPACE, uap->length));
|
|
}
|
|
|
|
int
|
|
kern_truncate(struct thread *td, char *path, enum uio_seg pathseg, off_t length)
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
|
|
if (length < 0)
|
|
return(EINVAL);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE | AUDITVNODE1, pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
vp = nd.ni_vp;
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0) {
|
|
vrele(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
VOP_LEASE(vp, td, td->td_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
if (vp->v_type == VDIR)
|
|
error = EISDIR;
|
|
#ifdef MAC
|
|
else if ((error = mac_check_vnode_write(td->td_ucred, NOCRED, vp))) {
|
|
}
|
|
#endif
|
|
else if ((error = vn_writechk(vp)) == 0 &&
|
|
(error = VOP_ACCESS(vp, VWRITE, td->td_ucred, td)) == 0) {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_size = length;
|
|
error = VOP_SETATTR(vp, &vattr, td->td_ucred, td);
|
|
}
|
|
vput(vp);
|
|
vn_finished_write(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Truncate a file given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ftruncate_args {
|
|
int fd;
|
|
int pad;
|
|
off_t length;
|
|
};
|
|
#endif
|
|
int
|
|
ftruncate(td, uap)
|
|
struct thread *td;
|
|
register struct ftruncate_args /* {
|
|
int fd;
|
|
int pad;
|
|
off_t length;
|
|
} */ *uap;
|
|
{
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int vfslocked;
|
|
int error;
|
|
|
|
AUDIT_ARG(fd, uap->fd);
|
|
if (uap->length < 0)
|
|
return(EINVAL);
|
|
if ((error = getvnode(td->td_proc->p_fd, uap->fd, &fp)) != 0)
|
|
return (error);
|
|
if ((fp->f_flag & FWRITE) == 0) {
|
|
fdrop(fp, td);
|
|
return (EINVAL);
|
|
}
|
|
vp = fp->f_vnode;
|
|
vfslocked = VFS_LOCK_GIANT(vp->v_mount);
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
|
|
goto drop;
|
|
VOP_LEASE(vp, td, td->td_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
AUDIT_ARG(vnode, vp, ARG_VNODE1);
|
|
if (vp->v_type == VDIR)
|
|
error = EISDIR;
|
|
#ifdef MAC
|
|
else if ((error = mac_check_vnode_write(td->td_ucred, fp->f_cred,
|
|
vp))) {
|
|
}
|
|
#endif
|
|
else if ((error = vn_writechk(vp)) == 0) {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_size = uap->length;
|
|
error = VOP_SETATTR(vp, &vattr, fp->f_cred, td);
|
|
}
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vn_finished_write(mp);
|
|
drop:
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
fdrop(fp, td);
|
|
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(td, uap)
|
|
struct thread *td;
|
|
register struct otruncate_args /* {
|
|
char *path;
|
|
long length;
|
|
} */ *uap;
|
|
{
|
|
struct truncate_args /* {
|
|
char *path;
|
|
int pad;
|
|
off_t length;
|
|
} */ nuap;
|
|
|
|
nuap.path = uap->path;
|
|
nuap.length = uap->length;
|
|
return (truncate(td, &nuap));
|
|
}
|
|
|
|
/*
|
|
* Truncate a file given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct oftruncate_args {
|
|
int fd;
|
|
long length;
|
|
};
|
|
#endif
|
|
int
|
|
oftruncate(td, uap)
|
|
struct thread *td;
|
|
register struct oftruncate_args /* {
|
|
int fd;
|
|
long length;
|
|
} */ *uap;
|
|
{
|
|
struct ftruncate_args /* {
|
|
int fd;
|
|
int pad;
|
|
off_t length;
|
|
} */ nuap;
|
|
|
|
nuap.fd = uap->fd;
|
|
nuap.length = uap->length;
|
|
return (ftruncate(td, &nuap));
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
/*
|
|
* Sync an open file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fsync_args {
|
|
int fd;
|
|
};
|
|
#endif
|
|
int
|
|
fsync(td, uap)
|
|
struct thread *td;
|
|
struct fsync_args /* {
|
|
int fd;
|
|
} */ *uap;
|
|
{
|
|
struct vnode *vp;
|
|
struct mount *mp;
|
|
struct file *fp;
|
|
int vfslocked;
|
|
int error;
|
|
|
|
AUDIT_ARG(fd, uap->fd);
|
|
if ((error = getvnode(td->td_proc->p_fd, uap->fd, &fp)) != 0)
|
|
return (error);
|
|
vp = fp->f_vnode;
|
|
vfslocked = VFS_LOCK_GIANT(vp->v_mount);
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
|
|
goto drop;
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
AUDIT_ARG(vnode, vp, ARG_VNODE1);
|
|
if (vp->v_object != NULL) {
|
|
VM_OBJECT_LOCK(vp->v_object);
|
|
vm_object_page_clean(vp->v_object, 0, 0, 0);
|
|
VM_OBJECT_UNLOCK(vp->v_object);
|
|
}
|
|
error = VOP_FSYNC(vp, MNT_WAIT, td);
|
|
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vn_finished_write(mp);
|
|
drop:
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* 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
|
|
rename(td, uap)
|
|
struct thread *td;
|
|
register struct rename_args /* {
|
|
char *from;
|
|
char *to;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_rename(td, uap->from, uap->to, UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_rename(struct thread *td, char *from, char *to, enum uio_seg pathseg)
|
|
{
|
|
struct mount *mp = NULL;
|
|
struct vnode *tvp, *fvp, *tdvp;
|
|
struct nameidata fromnd, tond;
|
|
int tvfslocked;
|
|
int fvfslocked;
|
|
int error;
|
|
|
|
bwillwrite();
|
|
#ifdef MAC
|
|
NDINIT(&fromnd, DELETE, LOCKPARENT | LOCKLEAF | SAVESTART | MPSAFE |
|
|
AUDITVNODE1, pathseg, from, td);
|
|
#else
|
|
NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART | MPSAFE |
|
|
AUDITVNODE1, pathseg, from, td);
|
|
#endif
|
|
if ((error = namei(&fromnd)) != 0)
|
|
return (error);
|
|
fvfslocked = NDHASGIANT(&fromnd);
|
|
tvfslocked = 0;
|
|
#ifdef MAC
|
|
error = mac_check_vnode_rename_from(td->td_ucred, fromnd.ni_dvp,
|
|
fromnd.ni_vp, &fromnd.ni_cnd);
|
|
VOP_UNLOCK(fromnd.ni_dvp, 0, td);
|
|
VOP_UNLOCK(fromnd.ni_vp, 0, td);
|
|
#endif
|
|
fvp = fromnd.ni_vp;
|
|
if (error == 0)
|
|
error = vn_start_write(fvp, &mp, V_WAIT | PCATCH);
|
|
if (error != 0) {
|
|
NDFREE(&fromnd, NDF_ONLY_PNBUF);
|
|
vrele(fromnd.ni_dvp);
|
|
vrele(fvp);
|
|
goto out1;
|
|
}
|
|
NDINIT(&tond, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART |
|
|
MPSAFE | AUDITVNODE2, pathseg, to, td);
|
|
if (fromnd.ni_vp->v_type == VDIR)
|
|
tond.ni_cnd.cn_flags |= WILLBEDIR;
|
|
if ((error = namei(&tond)) != 0) {
|
|
/* Translate error code for rename("dir1", "dir2/."). */
|
|
if (error == EISDIR && fvp->v_type == VDIR)
|
|
error = EINVAL;
|
|
NDFREE(&fromnd, NDF_ONLY_PNBUF);
|
|
vrele(fromnd.ni_dvp);
|
|
vrele(fvp);
|
|
vn_finished_write(mp);
|
|
goto out1;
|
|
}
|
|
tvfslocked = NDHASGIANT(&tond);
|
|
tdvp = tond.ni_dvp;
|
|
tvp = tond.ni_vp;
|
|
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;
|
|
}
|
|
}
|
|
if (fvp == tdvp)
|
|
error = EINVAL;
|
|
/*
|
|
* 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 = -1;
|
|
#ifdef MAC
|
|
else
|
|
error = mac_check_vnode_rename_to(td->td_ucred, tdvp,
|
|
tond.ni_vp, fromnd.ni_dvp == tdvp, &tond.ni_cnd);
|
|
#endif
|
|
out:
|
|
if (!error) {
|
|
VOP_LEASE(tdvp, td, td->td_ucred, LEASE_WRITE);
|
|
if (fromnd.ni_dvp != tdvp) {
|
|
VOP_LEASE(fromnd.ni_dvp, td, td->td_ucred, LEASE_WRITE);
|
|
}
|
|
if (tvp) {
|
|
VOP_LEASE(tvp, td, td->td_ucred, LEASE_WRITE);
|
|
}
|
|
error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd,
|
|
tond.ni_dvp, tond.ni_vp, &tond.ni_cnd);
|
|
NDFREE(&fromnd, NDF_ONLY_PNBUF);
|
|
NDFREE(&tond, NDF_ONLY_PNBUF);
|
|
} else {
|
|
NDFREE(&fromnd, NDF_ONLY_PNBUF);
|
|
NDFREE(&tond, NDF_ONLY_PNBUF);
|
|
if (tvp)
|
|
vput(tvp);
|
|
if (tdvp == tvp)
|
|
vrele(tdvp);
|
|
else
|
|
vput(tdvp);
|
|
vrele(fromnd.ni_dvp);
|
|
vrele(fvp);
|
|
}
|
|
vrele(tond.ni_startdir);
|
|
vn_finished_write(mp);
|
|
out1:
|
|
if (fromnd.ni_startdir)
|
|
vrele(fromnd.ni_startdir);
|
|
VFS_UNLOCK_GIANT(fvfslocked);
|
|
VFS_UNLOCK_GIANT(tvfslocked);
|
|
if (error == -1)
|
|
return (0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a directory file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mkdir_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
mkdir(td, uap)
|
|
struct thread *td;
|
|
register struct mkdir_args /* {
|
|
char *path;
|
|
int mode;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_mkdir(td, uap->path, UIO_USERSPACE, uap->mode));
|
|
}
|
|
|
|
int
|
|
kern_mkdir(struct thread *td, char *path, enum uio_seg segflg, int mode)
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
|
|
AUDIT_ARG(mode, mode);
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT(&nd, CREATE, LOCKPARENT | SAVENAME | MPSAFE | AUDITVNODE1,
|
|
segflg, path, td);
|
|
nd.ni_cnd.cn_flags |= WILLBEDIR;
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
vp = nd.ni_vp;
|
|
if (vp != NULL) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
/*
|
|
* XXX namei called with LOCKPARENT but not LOCKLEAF has
|
|
* the strange behaviour of leaving the vnode unlocked
|
|
* if the target is the same vnode as the parent.
|
|
*/
|
|
if (vp == nd.ni_dvp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (EEXIST);
|
|
}
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_type = VDIR;
|
|
FILEDESC_LOCK_FAST(td->td_proc->p_fd);
|
|
vattr.va_mode = (mode & ACCESSPERMS) &~ td->td_proc->p_fd->fd_cmask;
|
|
FILEDESC_UNLOCK_FAST(td->td_proc->p_fd);
|
|
#ifdef MAC
|
|
error = mac_check_vnode_create(td->td_ucred, nd.ni_dvp, &nd.ni_cnd,
|
|
&vattr);
|
|
if (error)
|
|
goto out;
|
|
#endif
|
|
VOP_LEASE(nd.ni_dvp, td, td->td_ucred, LEASE_WRITE);
|
|
error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
|
|
#ifdef MAC
|
|
out:
|
|
#endif
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
if (!error)
|
|
vput(nd.ni_vp);
|
|
vn_finished_write(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Remove a directory file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct rmdir_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
int
|
|
rmdir(td, uap)
|
|
struct thread *td;
|
|
struct rmdir_args /* {
|
|
char *path;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_rmdir(td, uap->path, UIO_USERSPACE));
|
|
}
|
|
|
|
int
|
|
kern_rmdir(struct thread *td, char *path, enum uio_seg pathseg)
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
int error;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF | MPSAFE | AUDITVNODE1,
|
|
pathseg, path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
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;
|
|
}
|
|
#ifdef MAC
|
|
error = mac_check_vnode_delete(td->td_ucred, nd.ni_dvp, vp,
|
|
&nd.ni_cnd);
|
|
if (error)
|
|
goto out;
|
|
#endif
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(vp);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
VOP_LEASE(nd.ni_dvp, td, td->td_ucred, LEASE_WRITE);
|
|
VOP_LEASE(vp, td, td->td_ucred, LEASE_WRITE);
|
|
error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
|
|
vn_finished_write(mp);
|
|
out:
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(vp);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
#ifdef COMPAT_43
|
|
/*
|
|
* 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(td, uap)
|
|
struct thread *td;
|
|
register struct ogetdirentries_args /* {
|
|
int fd;
|
|
char *buf;
|
|
u_int count;
|
|
long *basep;
|
|
} */ *uap;
|
|
{
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
struct uio auio, kuio;
|
|
struct iovec aiov, kiov;
|
|
struct dirent *dp, *edp;
|
|
caddr_t dirbuf;
|
|
int error, eofflag, readcnt, vfslocked;
|
|
long loff;
|
|
|
|
/* XXX arbitrary sanity limit on `count'. */
|
|
if (uap->count > 64 * 1024)
|
|
return (EINVAL);
|
|
if ((error = getvnode(td->td_proc->p_fd, uap->fd, &fp)) != 0)
|
|
return (error);
|
|
if ((fp->f_flag & FREAD) == 0) {
|
|
fdrop(fp, td);
|
|
return (EBADF);
|
|
}
|
|
vp = fp->f_vnode;
|
|
unionread:
|
|
vfslocked = VFS_LOCK_GIANT(vp->v_mount);
|
|
if (vp->v_type != VDIR) {
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
fdrop(fp, td);
|
|
return (EINVAL);
|
|
}
|
|
aiov.iov_base = uap->buf;
|
|
aiov.iov_len = uap->count;
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_td = td;
|
|
auio.uio_resid = uap->count;
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
loff = auio.uio_offset = fp->f_offset;
|
|
#ifdef MAC
|
|
error = mac_check_vnode_readdir(td->td_ucred, vp);
|
|
if (error) {
|
|
VOP_UNLOCK(vp, 0, td);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
#endif
|
|
# if (BYTE_ORDER != LITTLE_ENDIAN)
|
|
if (vp->v_mount->mnt_maxsymlinklen <= 0) {
|
|
error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag,
|
|
NULL, NULL);
|
|
fp->f_offset = auio.uio_offset;
|
|
} else
|
|
# endif
|
|
{
|
|
kuio = auio;
|
|
kuio.uio_iov = &kiov;
|
|
kuio.uio_segflg = UIO_SYSSPACE;
|
|
kiov.iov_len = uap->count;
|
|
MALLOC(dirbuf, caddr_t, uap->count, M_TEMP, M_WAITOK);
|
|
kiov.iov_base = dirbuf;
|
|
error = VOP_READDIR(vp, &kuio, fp->f_cred, &eofflag,
|
|
NULL, NULL);
|
|
fp->f_offset = kuio.uio_offset;
|
|
if (error == 0) {
|
|
readcnt = uap->count - kuio.uio_resid;
|
|
edp = (struct dirent *)&dirbuf[readcnt];
|
|
for (dp = (struct dirent *)dirbuf; dp < edp; ) {
|
|
# 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
|
|
if (dp->d_reclen > 0) {
|
|
dp = (struct dirent *)
|
|
((char *)dp + dp->d_reclen);
|
|
} else {
|
|
error = EIO;
|
|
break;
|
|
}
|
|
}
|
|
if (dp >= edp)
|
|
error = uiomove(dirbuf, readcnt, &auio);
|
|
}
|
|
FREE(dirbuf, M_TEMP);
|
|
}
|
|
VOP_UNLOCK(vp, 0, td);
|
|
if (error) {
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
if (uap->count == auio.uio_resid) {
|
|
if (union_dircheckp) {
|
|
error = union_dircheckp(td, &vp, fp);
|
|
if (error == -1) {
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
goto unionread;
|
|
}
|
|
if (error) {
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
}
|
|
/*
|
|
* XXX We could delay dropping the lock above but
|
|
* union_dircheckp complicates things.
|
|
*/
|
|
vn_lock(vp, LK_EXCLUSIVE|LK_RETRY, td);
|
|
if ((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;
|
|
fp->f_data = vp;
|
|
fp->f_offset = 0;
|
|
vput(tvp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
goto unionread;
|
|
}
|
|
VOP_UNLOCK(vp, 0, td);
|
|
}
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
error = copyout(&loff, uap->basep, sizeof(long));
|
|
fdrop(fp, td);
|
|
td->td_retval[0] = uap->count - auio.uio_resid;
|
|
return (error);
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
/*
|
|
* Read a block of directory entries in a filesystem independent format.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct getdirentries_args {
|
|
int fd;
|
|
char *buf;
|
|
u_int count;
|
|
long *basep;
|
|
};
|
|
#endif
|
|
int
|
|
getdirentries(td, uap)
|
|
struct thread *td;
|
|
register struct getdirentries_args /* {
|
|
int fd;
|
|
char *buf;
|
|
u_int count;
|
|
long *basep;
|
|
} */ *uap;
|
|
{
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
struct uio auio;
|
|
struct iovec aiov;
|
|
int vfslocked;
|
|
long loff;
|
|
int error, eofflag;
|
|
|
|
AUDIT_ARG(fd, uap->fd);
|
|
if ((error = getvnode(td->td_proc->p_fd, uap->fd, &fp)) != 0)
|
|
return (error);
|
|
if ((fp->f_flag & FREAD) == 0) {
|
|
fdrop(fp, td);
|
|
return (EBADF);
|
|
}
|
|
vp = fp->f_vnode;
|
|
unionread:
|
|
vfslocked = VFS_LOCK_GIANT(vp->v_mount);
|
|
if (vp->v_type != VDIR) {
|
|
error = EINVAL;
|
|
goto fail;
|
|
}
|
|
aiov.iov_base = uap->buf;
|
|
aiov.iov_len = uap->count;
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_td = td;
|
|
auio.uio_resid = uap->count;
|
|
/* vn_lock(vp, LK_SHARED | LK_RETRY, td); */
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
AUDIT_ARG(vnode, vp, ARG_VNODE1);
|
|
loff = auio.uio_offset = fp->f_offset;
|
|
#ifdef MAC
|
|
error = mac_check_vnode_readdir(td->td_ucred, vp);
|
|
if (error == 0)
|
|
#endif
|
|
error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, NULL,
|
|
NULL);
|
|
fp->f_offset = auio.uio_offset;
|
|
VOP_UNLOCK(vp, 0, td);
|
|
if (error)
|
|
goto fail;
|
|
if (uap->count == auio.uio_resid) {
|
|
if (union_dircheckp) {
|
|
error = union_dircheckp(td, &vp, fp);
|
|
if (error == -1) {
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
goto unionread;
|
|
}
|
|
if (error)
|
|
goto fail;
|
|
}
|
|
/*
|
|
* XXX We could delay dropping the lock above but
|
|
* union_dircheckp complicates things.
|
|
*/
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
if ((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;
|
|
fp->f_data = vp;
|
|
fp->f_offset = 0;
|
|
vput(tvp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
goto unionread;
|
|
}
|
|
VOP_UNLOCK(vp, 0, td);
|
|
}
|
|
if (uap->basep != NULL) {
|
|
error = copyout(&loff, uap->basep, sizeof(long));
|
|
}
|
|
td->td_retval[0] = uap->count - auio.uio_resid;
|
|
fail:
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct getdents_args {
|
|
int fd;
|
|
char *buf;
|
|
size_t count;
|
|
};
|
|
#endif
|
|
int
|
|
getdents(td, uap)
|
|
struct thread *td;
|
|
register struct getdents_args /* {
|
|
int fd;
|
|
char *buf;
|
|
u_int count;
|
|
} */ *uap;
|
|
{
|
|
struct getdirentries_args ap;
|
|
ap.fd = uap->fd;
|
|
ap.buf = uap->buf;
|
|
ap.count = uap->count;
|
|
ap.basep = NULL;
|
|
return (getdirentries(td, &ap));
|
|
}
|
|
|
|
/*
|
|
* Set the mode mask for creation of filesystem nodes.
|
|
*
|
|
* MP SAFE
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct umask_args {
|
|
int newmask;
|
|
};
|
|
#endif
|
|
int
|
|
umask(td, uap)
|
|
struct thread *td;
|
|
struct umask_args /* {
|
|
int newmask;
|
|
} */ *uap;
|
|
{
|
|
register struct filedesc *fdp;
|
|
|
|
FILEDESC_LOCK_FAST(td->td_proc->p_fd);
|
|
fdp = td->td_proc->p_fd;
|
|
td->td_retval[0] = fdp->fd_cmask;
|
|
fdp->fd_cmask = uap->newmask & ALLPERMS;
|
|
FILEDESC_UNLOCK_FAST(td->td_proc->p_fd);
|
|
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
|
|
revoke(td, uap)
|
|
struct thread *td;
|
|
register struct revoke_args /* {
|
|
char *path;
|
|
} */ *uap;
|
|
{
|
|
struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
int vfslocked;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | MPSAFE | AUDITVNODE1,
|
|
UIO_USERSPACE, uap->path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
vp = nd.ni_vp;
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (vp->v_type != VCHR) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
#ifdef MAC
|
|
error = mac_check_vnode_revoke(td->td_ucred, vp);
|
|
if (error)
|
|
goto out;
|
|
#endif
|
|
error = VOP_GETATTR(vp, &vattr, td->td_ucred, td);
|
|
if (error)
|
|
goto out;
|
|
if (td->td_ucred->cr_uid != vattr.va_uid) {
|
|
error = suser_cred(td->td_ucred, SUSER_ALLOWJAIL);
|
|
if (error)
|
|
goto out;
|
|
}
|
|
if (vcount(vp) > 1)
|
|
VOP_REVOKE(vp, REVOKEALL);
|
|
out:
|
|
vput(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Convert a user file descriptor to a kernel file entry.
|
|
* A reference on the file entry is held upon returning.
|
|
*/
|
|
int
|
|
getvnode(fdp, fd, fpp)
|
|
struct filedesc *fdp;
|
|
int fd;
|
|
struct file **fpp;
|
|
{
|
|
int error;
|
|
struct file *fp;
|
|
|
|
fp = NULL;
|
|
if (fdp == NULL)
|
|
error = EBADF;
|
|
else {
|
|
FILEDESC_LOCK(fdp);
|
|
if ((u_int)fd >= fdp->fd_nfiles ||
|
|
(fp = fdp->fd_ofiles[fd]) == NULL)
|
|
error = EBADF;
|
|
else if (fp->f_vnode == NULL) {
|
|
fp = NULL;
|
|
error = EINVAL;
|
|
} else {
|
|
fhold(fp);
|
|
error = 0;
|
|
}
|
|
FILEDESC_UNLOCK(fdp);
|
|
}
|
|
*fpp = fp;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get (NFS) file handle
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lgetfh_args {
|
|
char *fname;
|
|
fhandle_t *fhp;
|
|
};
|
|
#endif
|
|
int
|
|
lgetfh(td, uap)
|
|
struct thread *td;
|
|
register struct lgetfh_args *uap;
|
|
{
|
|
struct nameidata nd;
|
|
fhandle_t fh;
|
|
register struct vnode *vp;
|
|
int vfslocked;
|
|
int error;
|
|
|
|
error = suser(td);
|
|
if (error)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | MPSAFE | AUDITVNODE1,
|
|
UIO_USERSPACE, uap->fname, td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vp = nd.ni_vp;
|
|
bzero(&fh, sizeof(fh));
|
|
fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid;
|
|
error = VFS_VPTOFH(vp, &fh.fh_fid);
|
|
vput(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
if (error)
|
|
return (error);
|
|
error = copyout(&fh, uap->fhp, sizeof (fh));
|
|
return (error);
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct getfh_args {
|
|
char *fname;
|
|
fhandle_t *fhp;
|
|
};
|
|
#endif
|
|
int
|
|
getfh(td, uap)
|
|
struct thread *td;
|
|
register struct getfh_args *uap;
|
|
{
|
|
struct nameidata nd;
|
|
fhandle_t fh;
|
|
register struct vnode *vp;
|
|
int vfslocked;
|
|
int error;
|
|
|
|
error = suser(td);
|
|
if (error)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | MPSAFE | AUDITVNODE1,
|
|
UIO_USERSPACE, uap->fname, td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vp = nd.ni_vp;
|
|
bzero(&fh, sizeof(fh));
|
|
fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid;
|
|
error = VFS_VPTOFH(vp, &fh.fh_fid);
|
|
vput(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
if (error)
|
|
return (error);
|
|
error = copyout(&fh, uap->fhp, sizeof (fh));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* syscall for the rpc.lockd to use to translate a NFS file handle into
|
|
* an open descriptor.
|
|
*
|
|
* warning: do not remove the suser() call or this becomes one giant
|
|
* security hole.
|
|
*
|
|
* MP SAFE
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fhopen_args {
|
|
const struct fhandle *u_fhp;
|
|
int flags;
|
|
};
|
|
#endif
|
|
int
|
|
fhopen(td, uap)
|
|
struct thread *td;
|
|
struct fhopen_args /* {
|
|
const struct fhandle *u_fhp;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct proc *p = td->td_proc;
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
struct fhandle fhp;
|
|
struct vattr vat;
|
|
struct vattr *vap = &vat;
|
|
struct flock lf;
|
|
struct file *fp;
|
|
register struct filedesc *fdp = p->p_fd;
|
|
int fmode, mode, error, type;
|
|
struct file *nfp;
|
|
int vfslocked;
|
|
int indx;
|
|
|
|
error = suser(td);
|
|
if (error)
|
|
return (error);
|
|
fmode = FFLAGS(uap->flags);
|
|
/* why not allow a non-read/write open for our lockd? */
|
|
if (((fmode & (FREAD | FWRITE)) == 0) || (fmode & O_CREAT))
|
|
return (EINVAL);
|
|
error = copyin(uap->u_fhp, &fhp, sizeof(fhp));
|
|
if (error)
|
|
return(error);
|
|
/* find the mount point */
|
|
mp = vfs_getvfs(&fhp.fh_fsid);
|
|
if (mp == NULL)
|
|
return (ESTALE);
|
|
vfslocked = VFS_LOCK_GIANT(mp);
|
|
/* now give me my vnode, it gets returned to me locked */
|
|
error = VFS_FHTOVP(mp, &fhp.fh_fid, &vp);
|
|
if (error)
|
|
goto out;
|
|
/*
|
|
* from now on we have to make sure not
|
|
* to forget about the vnode
|
|
* any error that causes an abort must vput(vp)
|
|
* just set error = err and 'goto bad;'.
|
|
*/
|
|
|
|
/*
|
|
* from vn_open
|
|
*/
|
|
if (vp->v_type == VLNK) {
|
|
error = EMLINK;
|
|
goto bad;
|
|
}
|
|
if (vp->v_type == VSOCK) {
|
|
error = EOPNOTSUPP;
|
|
goto bad;
|
|
}
|
|
mode = 0;
|
|
if (fmode & (FWRITE | O_TRUNC)) {
|
|
if (vp->v_type == VDIR) {
|
|
error = EISDIR;
|
|
goto bad;
|
|
}
|
|
error = vn_writechk(vp);
|
|
if (error)
|
|
goto bad;
|
|
mode |= VWRITE;
|
|
}
|
|
if (fmode & FREAD)
|
|
mode |= VREAD;
|
|
if (fmode & O_APPEND)
|
|
mode |= VAPPEND;
|
|
#ifdef MAC
|
|
error = mac_check_vnode_open(td->td_ucred, vp, mode);
|
|
if (error)
|
|
goto bad;
|
|
#endif
|
|
if (mode) {
|
|
error = VOP_ACCESS(vp, mode, td->td_ucred, td);
|
|
if (error)
|
|
goto bad;
|
|
}
|
|
if (fmode & O_TRUNC) {
|
|
VOP_UNLOCK(vp, 0, td); /* XXX */
|
|
if ((error = vn_start_write(NULL, &mp, V_WAIT | PCATCH)) != 0) {
|
|
vrele(vp);
|
|
goto out;
|
|
}
|
|
VOP_LEASE(vp, td, td->td_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); /* XXX */
|
|
#ifdef MAC
|
|
/*
|
|
* We don't yet have fp->f_cred, so use td->td_ucred, which
|
|
* should be right.
|
|
*/
|
|
error = mac_check_vnode_write(td->td_ucred, td->td_ucred, vp);
|
|
if (error == 0) {
|
|
#endif
|
|
VATTR_NULL(vap);
|
|
vap->va_size = 0;
|
|
error = VOP_SETATTR(vp, vap, td->td_ucred, td);
|
|
#ifdef MAC
|
|
}
|
|
#endif
|
|
vn_finished_write(mp);
|
|
if (error)
|
|
goto bad;
|
|
}
|
|
error = VOP_OPEN(vp, fmode, td->td_ucred, td, -1);
|
|
if (error)
|
|
goto bad;
|
|
|
|
if (fmode & FWRITE)
|
|
vp->v_writecount++;
|
|
|
|
/*
|
|
* end of vn_open code
|
|
*/
|
|
|
|
if ((error = falloc(td, &nfp, &indx)) != 0) {
|
|
if (fmode & FWRITE)
|
|
vp->v_writecount--;
|
|
goto bad;
|
|
}
|
|
/* An extra reference on `nfp' has been held for us by falloc(). */
|
|
fp = nfp;
|
|
|
|
nfp->f_vnode = vp;
|
|
nfp->f_data = vp;
|
|
nfp->f_flag = fmode & FMASK;
|
|
nfp->f_ops = &vnops;
|
|
nfp->f_type = DTYPE_VNODE;
|
|
if (fmode & (O_EXLOCK | O_SHLOCK)) {
|
|
lf.l_whence = SEEK_SET;
|
|
lf.l_start = 0;
|
|
lf.l_len = 0;
|
|
if (fmode & O_EXLOCK)
|
|
lf.l_type = F_WRLCK;
|
|
else
|
|
lf.l_type = F_RDLCK;
|
|
type = F_FLOCK;
|
|
if ((fmode & FNONBLOCK) == 0)
|
|
type |= F_WAIT;
|
|
VOP_UNLOCK(vp, 0, td);
|
|
if ((error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf,
|
|
type)) != 0) {
|
|
/*
|
|
* The lock request failed. Normally close the
|
|
* descriptor but handle the case where someone might
|
|
* have dup()d or close()d it when we weren't looking.
|
|
*/
|
|
fdclose(fdp, fp, indx, td);
|
|
|
|
/*
|
|
* release our private reference
|
|
*/
|
|
fdrop(fp, td);
|
|
goto out;
|
|
}
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
fp->f_flag |= FHASLOCK;
|
|
}
|
|
|
|
VOP_UNLOCK(vp, 0, td);
|
|
fdrop(fp, td);
|
|
vfs_rel(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
td->td_retval[0] = indx;
|
|
return (0);
|
|
|
|
bad:
|
|
vput(vp);
|
|
out:
|
|
vfs_rel(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Stat an (NFS) file handle.
|
|
*
|
|
* MP SAFE
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fhstat_args {
|
|
struct fhandle *u_fhp;
|
|
struct stat *sb;
|
|
};
|
|
#endif
|
|
int
|
|
fhstat(td, uap)
|
|
struct thread *td;
|
|
register struct fhstat_args /* {
|
|
struct fhandle *u_fhp;
|
|
struct stat *sb;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
fhandle_t fh;
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
int vfslocked;
|
|
int error;
|
|
|
|
error = suser(td);
|
|
if (error)
|
|
return (error);
|
|
error = copyin(uap->u_fhp, &fh, sizeof(fhandle_t));
|
|
if (error)
|
|
return (error);
|
|
if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL)
|
|
return (ESTALE);
|
|
vfslocked = VFS_LOCK_GIANT(mp);
|
|
if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp))) {
|
|
vfs_rel(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
error = vn_stat(vp, &sb, td->td_ucred, NOCRED, td);
|
|
vput(vp);
|
|
vfs_rel(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
if (error)
|
|
return (error);
|
|
error = copyout(&sb, uap->sb, sizeof(sb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Implement fstatfs() for (NFS) file handles.
|
|
*
|
|
* MP SAFE
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fhstatfs_args {
|
|
struct fhandle *u_fhp;
|
|
struct statfs *buf;
|
|
};
|
|
#endif
|
|
int
|
|
fhstatfs(td, uap)
|
|
struct thread *td;
|
|
struct fhstatfs_args /* {
|
|
struct fhandle *u_fhp;
|
|
struct statfs *buf;
|
|
} */ *uap;
|
|
{
|
|
struct statfs sf;
|
|
fhandle_t fh;
|
|
int error;
|
|
|
|
error = copyin(uap->u_fhp, &fh, sizeof(fhandle_t));
|
|
if (error)
|
|
return (error);
|
|
error = kern_fhstatfs(td, fh, &sf);
|
|
if (error)
|
|
return (error);
|
|
return (copyout(&sf, uap->buf, sizeof(sf)));
|
|
}
|
|
|
|
int
|
|
kern_fhstatfs(struct thread *td, fhandle_t fh, struct statfs *buf)
|
|
{
|
|
struct statfs *sp;
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
int vfslocked;
|
|
int error;
|
|
|
|
error = suser(td);
|
|
if (error)
|
|
return (error);
|
|
if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL)
|
|
return (ESTALE);
|
|
vfslocked = VFS_LOCK_GIANT(mp);
|
|
error = VFS_FHTOVP(mp, &fh.fh_fid, &vp);
|
|
if (error) {
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
vfs_rel(mp);
|
|
return (error);
|
|
}
|
|
vput(vp);
|
|
error = prison_canseemount(td->td_ucred, mp);
|
|
if (error)
|
|
goto out;
|
|
#ifdef MAC
|
|
error = mac_check_mount_stat(td->td_ucred, mp);
|
|
if (error)
|
|
goto out;
|
|
#endif
|
|
/*
|
|
* Set these in case the underlying filesystem fails to do so.
|
|
*/
|
|
sp = &mp->mnt_stat;
|
|
sp->f_version = STATFS_VERSION;
|
|
sp->f_namemax = NAME_MAX;
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
error = VFS_STATFS(mp, sp, td);
|
|
if (error == 0)
|
|
*buf = *sp;
|
|
out:
|
|
vfs_rel(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Syscall to push extended attribute configuration information into the
|
|
* VFS. Accepts a path, which it converts to a mountpoint, as well as
|
|
* a command (int cmd), and attribute name and misc data. For now, the
|
|
* attribute name is left in userspace for consumption by the VFS_op.
|
|
* It will probably be changed to be copied into sysspace by the
|
|
* syscall in the future, once issues with various consumers of the
|
|
* attribute code have raised their hands.
|
|
*
|
|
* Currently this is used only by UFS Extended Attributes.
|
|
*/
|
|
int
|
|
extattrctl(td, uap)
|
|
struct thread *td;
|
|
struct extattrctl_args /* {
|
|
const char *path;
|
|
int cmd;
|
|
const char *filename;
|
|
int attrnamespace;
|
|
const char *attrname;
|
|
} */ *uap;
|
|
{
|
|
struct vnode *filename_vp;
|
|
struct nameidata nd;
|
|
struct mount *mp, *mp_writable;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int vfslocked, fnvfslocked, error;
|
|
|
|
AUDIT_ARG(cmd, uap->cmd);
|
|
AUDIT_ARG(value, uap->attrnamespace);
|
|
/*
|
|
* uap->attrname is not always defined. We check again later when we
|
|
* invoke the VFS call so as to pass in NULL there if needed.
|
|
*/
|
|
if (uap->attrname != NULL) {
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN,
|
|
NULL);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
AUDIT_ARG(text, attrname);
|
|
|
|
vfslocked = fnvfslocked = 0;
|
|
/*
|
|
* uap->filename is not always defined. If it is, grab a vnode lock,
|
|
* which VFS_EXTATTRCTL() will later release.
|
|
*/
|
|
filename_vp = NULL;
|
|
if (uap->filename != NULL) {
|
|
NDINIT(&nd, LOOKUP, MPSAFE | FOLLOW | LOCKLEAF |
|
|
AUDITVNODE2, UIO_USERSPACE, uap->filename, td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
fnvfslocked = NDHASGIANT(&nd);
|
|
filename_vp = nd.ni_vp;
|
|
NDFREE(&nd, NDF_NO_VP_RELE | NDF_NO_VP_UNLOCK);
|
|
}
|
|
|
|
/* uap->path is always defined. */
|
|
NDINIT(&nd, LOOKUP, MPSAFE | FOLLOW | AUDITVNODE1, UIO_USERSPACE,
|
|
uap->path, td);
|
|
error = namei(&nd);
|
|
if (error) {
|
|
if (filename_vp != NULL)
|
|
vput(filename_vp);
|
|
goto out;
|
|
}
|
|
vfslocked = NDHASGIANT(&nd);
|
|
mp = nd.ni_vp->v_mount;
|
|
error = vn_start_write(nd.ni_vp, &mp_writable, V_WAIT | PCATCH);
|
|
NDFREE(&nd, 0);
|
|
if (error) {
|
|
if (filename_vp != NULL)
|
|
vput(filename_vp);
|
|
goto out;
|
|
}
|
|
|
|
error = VFS_EXTATTRCTL(mp, uap->cmd, filename_vp, uap->attrnamespace,
|
|
uap->attrname != NULL ? attrname : NULL, td);
|
|
|
|
vn_finished_write(mp_writable);
|
|
/*
|
|
* VFS_EXTATTRCTL will have unlocked, but not de-ref'd,
|
|
* filename_vp, so vrele it if it is defined.
|
|
*/
|
|
if (filename_vp != NULL)
|
|
vrele(filename_vp);
|
|
out:
|
|
VFS_UNLOCK_GIANT(fnvfslocked);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*-
|
|
* Set a named extended attribute on a file or directory
|
|
*
|
|
* Arguments: unlocked vnode "vp", attribute namespace "attrnamespace",
|
|
* kernelspace string pointer "attrname", userspace buffer
|
|
* pointer "data", buffer length "nbytes", thread "td".
|
|
* Returns: 0 on success, an error number otherwise
|
|
* Locks: none
|
|
* References: vp must be a valid reference for the duration of the call
|
|
*/
|
|
static int
|
|
extattr_set_vp(struct vnode *vp, int attrnamespace, const char *attrname,
|
|
void *data, size_t nbytes, struct thread *td)
|
|
{
|
|
struct mount *mp;
|
|
struct uio auio;
|
|
struct iovec aiov;
|
|
ssize_t cnt;
|
|
int error;
|
|
|
|
VFS_ASSERT_GIANT(vp->v_mount);
|
|
error = vn_start_write(vp, &mp, V_WAIT | PCATCH);
|
|
if (error)
|
|
return (error);
|
|
VOP_LEASE(vp, td, td->td_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
|
|
aiov.iov_base = data;
|
|
aiov.iov_len = nbytes;
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_offset = 0;
|
|
if (nbytes > INT_MAX) {
|
|
error = EINVAL;
|
|
goto done;
|
|
}
|
|
auio.uio_resid = nbytes;
|
|
auio.uio_rw = UIO_WRITE;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_td = td;
|
|
cnt = nbytes;
|
|
|
|
#ifdef MAC
|
|
error = mac_check_vnode_setextattr(td->td_ucred, vp, attrnamespace,
|
|
attrname, &auio);
|
|
if (error)
|
|
goto done;
|
|
#endif
|
|
|
|
error = VOP_SETEXTATTR(vp, attrnamespace, attrname, &auio,
|
|
td->td_ucred, td);
|
|
cnt -= auio.uio_resid;
|
|
td->td_retval[0] = cnt;
|
|
|
|
done:
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
extattr_set_fd(td, uap)
|
|
struct thread *td;
|
|
struct extattr_set_fd_args /* {
|
|
int fd;
|
|
int attrnamespace;
|
|
const char *attrname;
|
|
void *data;
|
|
size_t nbytes;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int vfslocked, error;
|
|
|
|
AUDIT_ARG(fd, uap->fd);
|
|
AUDIT_ARG(value, uap->attrnamespace);
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return (error);
|
|
AUDIT_ARG(text, attrname);
|
|
|
|
error = getvnode(td->td_proc->p_fd, uap->fd, &fp);
|
|
if (error)
|
|
return (error);
|
|
|
|
vfslocked = VFS_LOCK_GIANT(fp->f_vnode->v_mount);
|
|
error = extattr_set_vp(fp->f_vnode, uap->attrnamespace,
|
|
attrname, uap->data, uap->nbytes, td);
|
|
fdrop(fp, td);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
extattr_set_file(td, uap)
|
|
struct thread *td;
|
|
struct extattr_set_file_args /* {
|
|
const char *path;
|
|
int attrnamespace;
|
|
const char *attrname;
|
|
void *data;
|
|
size_t nbytes;
|
|
} */ *uap;
|
|
{
|
|
struct nameidata nd;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int vfslocked, error;
|
|
|
|
AUDIT_ARG(value, uap->attrnamespace);
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return (error);
|
|
AUDIT_ARG(text, attrname);
|
|
|
|
NDINIT(&nd, LOOKUP, MPSAFE | FOLLOW | AUDITVNODE1, UIO_USERSPACE,
|
|
uap->path, td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
|
|
vfslocked = NDHASGIANT(&nd);
|
|
error = extattr_set_vp(nd.ni_vp, uap->attrnamespace, attrname,
|
|
uap->data, uap->nbytes, td);
|
|
|
|
vrele(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
extattr_set_link(td, uap)
|
|
struct thread *td;
|
|
struct extattr_set_link_args /* {
|
|
const char *path;
|
|
int attrnamespace;
|
|
const char *attrname;
|
|
void *data;
|
|
size_t nbytes;
|
|
} */ *uap;
|
|
{
|
|
struct nameidata nd;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int vfslocked, error;
|
|
|
|
AUDIT_ARG(value, uap->attrnamespace);
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return (error);
|
|
AUDIT_ARG(text, attrname);
|
|
|
|
NDINIT(&nd, LOOKUP, MPSAFE | NOFOLLOW | AUDITVNODE1, UIO_USERSPACE,
|
|
uap->path, td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
|
|
vfslocked = NDHASGIANT(&nd);
|
|
error = extattr_set_vp(nd.ni_vp, uap->attrnamespace, attrname,
|
|
uap->data, uap->nbytes, td);
|
|
|
|
vrele(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*-
|
|
* Get a named extended attribute on a file or directory
|
|
*
|
|
* Arguments: unlocked vnode "vp", attribute namespace "attrnamespace",
|
|
* kernelspace string pointer "attrname", userspace buffer
|
|
* pointer "data", buffer length "nbytes", thread "td".
|
|
* Returns: 0 on success, an error number otherwise
|
|
* Locks: none
|
|
* References: vp must be a valid reference for the duration of the call
|
|
*/
|
|
static int
|
|
extattr_get_vp(struct vnode *vp, int attrnamespace, const char *attrname,
|
|
void *data, size_t nbytes, struct thread *td)
|
|
{
|
|
struct uio auio, *auiop;
|
|
struct iovec aiov;
|
|
ssize_t cnt;
|
|
size_t size, *sizep;
|
|
int error;
|
|
|
|
VFS_ASSERT_GIANT(vp->v_mount);
|
|
VOP_LEASE(vp, td, td->td_ucred, LEASE_READ);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
|
|
/*
|
|
* Slightly unusual semantics: if the user provides a NULL data
|
|
* pointer, they don't want to receive the data, just the
|
|
* maximum read length.
|
|
*/
|
|
auiop = NULL;
|
|
sizep = NULL;
|
|
cnt = 0;
|
|
if (data != NULL) {
|
|
aiov.iov_base = data;
|
|
aiov.iov_len = nbytes;
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_offset = 0;
|
|
if (nbytes > INT_MAX) {
|
|
error = EINVAL;
|
|
goto done;
|
|
}
|
|
auio.uio_resid = nbytes;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_td = td;
|
|
auiop = &auio;
|
|
cnt = nbytes;
|
|
} else
|
|
sizep = &size;
|
|
|
|
#ifdef MAC
|
|
error = mac_check_vnode_getextattr(td->td_ucred, vp, attrnamespace,
|
|
attrname, &auio);
|
|
if (error)
|
|
goto done;
|
|
#endif
|
|
|
|
error = VOP_GETEXTATTR(vp, attrnamespace, attrname, auiop, sizep,
|
|
td->td_ucred, td);
|
|
|
|
if (auiop != NULL) {
|
|
cnt -= auio.uio_resid;
|
|
td->td_retval[0] = cnt;
|
|
} else
|
|
td->td_retval[0] = size;
|
|
|
|
done:
|
|
VOP_UNLOCK(vp, 0, td);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
extattr_get_fd(td, uap)
|
|
struct thread *td;
|
|
struct extattr_get_fd_args /* {
|
|
int fd;
|
|
int attrnamespace;
|
|
const char *attrname;
|
|
void *data;
|
|
size_t nbytes;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int vfslocked, error;
|
|
|
|
AUDIT_ARG(fd, uap->fd);
|
|
AUDIT_ARG(value, uap->attrnamespace);
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return (error);
|
|
AUDIT_ARG(text, attrname);
|
|
|
|
error = getvnode(td->td_proc->p_fd, uap->fd, &fp);
|
|
if (error)
|
|
return (error);
|
|
|
|
vfslocked = VFS_LOCK_GIANT(fp->f_vnode->v_mount);
|
|
error = extattr_get_vp(fp->f_vnode, uap->attrnamespace,
|
|
attrname, uap->data, uap->nbytes, td);
|
|
|
|
fdrop(fp, td);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
extattr_get_file(td, uap)
|
|
struct thread *td;
|
|
struct extattr_get_file_args /* {
|
|
const char *path;
|
|
int attrnamespace;
|
|
const char *attrname;
|
|
void *data;
|
|
size_t nbytes;
|
|
} */ *uap;
|
|
{
|
|
struct nameidata nd;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int vfslocked, error;
|
|
|
|
AUDIT_ARG(value, uap->attrnamespace);
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return (error);
|
|
AUDIT_ARG(text, attrname);
|
|
|
|
NDINIT(&nd, LOOKUP, MPSAFE | FOLLOW | AUDITVNODE1, UIO_USERSPACE,
|
|
uap->path, td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
|
|
vfslocked = NDHASGIANT(&nd);
|
|
error = extattr_get_vp(nd.ni_vp, uap->attrnamespace, attrname,
|
|
uap->data, uap->nbytes, td);
|
|
|
|
vrele(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
extattr_get_link(td, uap)
|
|
struct thread *td;
|
|
struct extattr_get_link_args /* {
|
|
const char *path;
|
|
int attrnamespace;
|
|
const char *attrname;
|
|
void *data;
|
|
size_t nbytes;
|
|
} */ *uap;
|
|
{
|
|
struct nameidata nd;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int vfslocked, error;
|
|
|
|
AUDIT_ARG(value, uap->attrnamespace);
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return (error);
|
|
AUDIT_ARG(text, attrname);
|
|
|
|
NDINIT(&nd, LOOKUP, MPSAFE | NOFOLLOW | AUDITVNODE1, UIO_USERSPACE,
|
|
uap->path, td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
|
|
vfslocked = NDHASGIANT(&nd);
|
|
error = extattr_get_vp(nd.ni_vp, uap->attrnamespace, attrname,
|
|
uap->data, uap->nbytes, td);
|
|
|
|
vrele(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* extattr_delete_vp(): Delete a named extended attribute on a file or
|
|
* directory
|
|
*
|
|
* Arguments: unlocked vnode "vp", attribute namespace "attrnamespace",
|
|
* kernelspace string pointer "attrname", proc "p"
|
|
* Returns: 0 on success, an error number otherwise
|
|
* Locks: none
|
|
* References: vp must be a valid reference for the duration of the call
|
|
*/
|
|
static int
|
|
extattr_delete_vp(struct vnode *vp, int attrnamespace, const char *attrname,
|
|
struct thread *td)
|
|
{
|
|
struct mount *mp;
|
|
int error;
|
|
|
|
VFS_ASSERT_GIANT(vp->v_mount);
|
|
error = vn_start_write(vp, &mp, V_WAIT | PCATCH);
|
|
if (error)
|
|
return (error);
|
|
VOP_LEASE(vp, td, td->td_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
|
|
#ifdef MAC
|
|
error = mac_check_vnode_deleteextattr(td->td_ucred, vp, attrnamespace,
|
|
attrname);
|
|
if (error)
|
|
goto done;
|
|
#endif
|
|
|
|
error = VOP_DELETEEXTATTR(vp, attrnamespace, attrname, td->td_ucred,
|
|
td);
|
|
if (error == EOPNOTSUPP)
|
|
error = VOP_SETEXTATTR(vp, attrnamespace, attrname, NULL,
|
|
td->td_ucred, td);
|
|
#ifdef MAC
|
|
done:
|
|
#endif
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
extattr_delete_fd(td, uap)
|
|
struct thread *td;
|
|
struct extattr_delete_fd_args /* {
|
|
int fd;
|
|
int attrnamespace;
|
|
const char *attrname;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int vfslocked, error;
|
|
|
|
AUDIT_ARG(fd, uap->fd);
|
|
AUDIT_ARG(value, uap->attrnamespace);
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return (error);
|
|
AUDIT_ARG(text, attrname);
|
|
|
|
error = getvnode(td->td_proc->p_fd, uap->fd, &fp);
|
|
if (error)
|
|
return (error);
|
|
|
|
vfslocked = VFS_LOCK_GIANT(fp->f_vnode->v_mount);
|
|
error = extattr_delete_vp(fp->f_vnode, uap->attrnamespace,
|
|
attrname, td);
|
|
fdrop(fp, td);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
extattr_delete_file(td, uap)
|
|
struct thread *td;
|
|
struct extattr_delete_file_args /* {
|
|
const char *path;
|
|
int attrnamespace;
|
|
const char *attrname;
|
|
} */ *uap;
|
|
{
|
|
struct nameidata nd;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int vfslocked, error;
|
|
|
|
AUDIT_ARG(value, uap->attrnamespace);
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return(error);
|
|
AUDIT_ARG(text, attrname);
|
|
|
|
NDINIT(&nd, LOOKUP, MPSAFE | FOLLOW | AUDITVNODE1, UIO_USERSPACE,
|
|
uap->path, td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return(error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
|
|
vfslocked = NDHASGIANT(&nd);
|
|
error = extattr_delete_vp(nd.ni_vp, uap->attrnamespace, attrname, td);
|
|
vrele(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return(error);
|
|
}
|
|
|
|
int
|
|
extattr_delete_link(td, uap)
|
|
struct thread *td;
|
|
struct extattr_delete_link_args /* {
|
|
const char *path;
|
|
int attrnamespace;
|
|
const char *attrname;
|
|
} */ *uap;
|
|
{
|
|
struct nameidata nd;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int vfslocked, error;
|
|
|
|
AUDIT_ARG(value, uap->attrnamespace);
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return(error);
|
|
AUDIT_ARG(text, attrname);
|
|
|
|
NDINIT(&nd, LOOKUP, MPSAFE | NOFOLLOW | AUDITVNODE1, UIO_USERSPACE,
|
|
uap->path, td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return(error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
|
|
vfslocked = NDHASGIANT(&nd);
|
|
error = extattr_delete_vp(nd.ni_vp, uap->attrnamespace, attrname, td);
|
|
vrele(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return(error);
|
|
}
|
|
|
|
/*-
|
|
* Retrieve a list of extended attributes on a file or directory.
|
|
*
|
|
* Arguments: unlocked vnode "vp", attribute namespace 'attrnamespace",
|
|
* userspace buffer pointer "data", buffer length "nbytes",
|
|
* thread "td".
|
|
* Returns: 0 on success, an error number otherwise
|
|
* Locks: none
|
|
* References: vp must be a valid reference for the duration of the call
|
|
*/
|
|
static int
|
|
extattr_list_vp(struct vnode *vp, int attrnamespace, void *data,
|
|
size_t nbytes, struct thread *td)
|
|
{
|
|
struct uio auio, *auiop;
|
|
size_t size, *sizep;
|
|
struct iovec aiov;
|
|
ssize_t cnt;
|
|
int error;
|
|
|
|
VFS_ASSERT_GIANT(vp->v_mount);
|
|
VOP_LEASE(vp, td, td->td_ucred, LEASE_READ);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
|
|
auiop = NULL;
|
|
sizep = NULL;
|
|
cnt = 0;
|
|
if (data != NULL) {
|
|
aiov.iov_base = data;
|
|
aiov.iov_len = nbytes;
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_offset = 0;
|
|
if (nbytes > INT_MAX) {
|
|
error = EINVAL;
|
|
goto done;
|
|
}
|
|
auio.uio_resid = nbytes;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_td = td;
|
|
auiop = &auio;
|
|
cnt = nbytes;
|
|
} else
|
|
sizep = &size;
|
|
|
|
#ifdef MAC
|
|
error = mac_check_vnode_listextattr(td->td_ucred, vp, attrnamespace);
|
|
if (error)
|
|
goto done;
|
|
#endif
|
|
|
|
error = VOP_LISTEXTATTR(vp, attrnamespace, auiop, sizep,
|
|
td->td_ucred, td);
|
|
|
|
if (auiop != NULL) {
|
|
cnt -= auio.uio_resid;
|
|
td->td_retval[0] = cnt;
|
|
} else
|
|
td->td_retval[0] = size;
|
|
|
|
done:
|
|
VOP_UNLOCK(vp, 0, td);
|
|
return (error);
|
|
}
|
|
|
|
|
|
int
|
|
extattr_list_fd(td, uap)
|
|
struct thread *td;
|
|
struct extattr_list_fd_args /* {
|
|
int fd;
|
|
int attrnamespace;
|
|
void *data;
|
|
size_t nbytes;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
int vfslocked, error;
|
|
|
|
AUDIT_ARG(fd, uap->fd);
|
|
AUDIT_ARG(value, uap->attrnamespace);
|
|
error = getvnode(td->td_proc->p_fd, uap->fd, &fp);
|
|
if (error)
|
|
return (error);
|
|
|
|
vfslocked = VFS_LOCK_GIANT(fp->f_vnode->v_mount);
|
|
error = extattr_list_vp(fp->f_vnode, uap->attrnamespace, uap->data,
|
|
uap->nbytes, td);
|
|
|
|
fdrop(fp, td);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
extattr_list_file(td, uap)
|
|
struct thread*td;
|
|
struct extattr_list_file_args /* {
|
|
const char *path;
|
|
int attrnamespace;
|
|
void *data;
|
|
size_t nbytes;
|
|
} */ *uap;
|
|
{
|
|
struct nameidata nd;
|
|
int vfslocked, error;
|
|
|
|
AUDIT_ARG(value, uap->attrnamespace);
|
|
NDINIT(&nd, LOOKUP, MPSAFE | FOLLOW | AUDITVNODE1, UIO_USERSPACE,
|
|
uap->path, td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
|
|
vfslocked = NDHASGIANT(&nd);
|
|
error = extattr_list_vp(nd.ni_vp, uap->attrnamespace, uap->data,
|
|
uap->nbytes, td);
|
|
|
|
vrele(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
extattr_list_link(td, uap)
|
|
struct thread*td;
|
|
struct extattr_list_link_args /* {
|
|
const char *path;
|
|
int attrnamespace;
|
|
void *data;
|
|
size_t nbytes;
|
|
} */ *uap;
|
|
{
|
|
struct nameidata nd;
|
|
int vfslocked, error;
|
|
|
|
AUDIT_ARG(value, uap->attrnamespace);
|
|
NDINIT(&nd, LOOKUP, MPSAFE | NOFOLLOW | AUDITVNODE1, UIO_USERSPACE,
|
|
uap->path, td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
|
|
vfslocked = NDHASGIANT(&nd);
|
|
error = extattr_list_vp(nd.ni_vp, uap->attrnamespace, uap->data,
|
|
uap->nbytes, td);
|
|
|
|
vrele(nd.ni_vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|