3700fdfba4
Otherwise, race condition occurs (e.g., between mountd(8) and next mount(8) when multiple update mount command is invoked from shell script).
3112 lines
68 KiB
C
3112 lines
68 KiB
C
/* $NetBSD: vfs_syscalls.c,v 1.174 2002/05/11 00:45:06 enami Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
* (c) UNIX System Laboratories, Inc.
|
|
* All or some portions of this file are derived from material licensed
|
|
* to the University of California by American Telephone and Telegraph
|
|
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
|
|
* the permission of UNIX System Laboratories, Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)vfs_syscalls.c 8.42 (Berkeley) 7/31/95
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: vfs_syscalls.c,v 1.174 2002/05/11 00:45:06 enami Exp $");
|
|
|
|
#include "opt_compat_netbsd.h"
|
|
#include "opt_compat_43.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/namei.h>
|
|
#include <sys/filedesc.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/file.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/uio.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/dirent.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/syscallargs.h>
|
|
|
|
#include <miscfs/genfs/genfs.h>
|
|
#include <miscfs/syncfs/syncfs.h>
|
|
|
|
static int change_dir __P((struct nameidata *, struct proc *));
|
|
static int change_flags __P((struct vnode *, u_long, struct proc *));
|
|
static int change_mode __P((struct vnode *, int, struct proc *p));
|
|
static int change_owner __P((struct vnode *, uid_t, gid_t, struct proc *,
|
|
int));
|
|
static int change_utimes __P((struct vnode *vp, const struct timeval *,
|
|
struct proc *p));
|
|
static int rename_files __P((const char *, const char *, struct proc *, int));
|
|
|
|
void checkdirs __P((struct vnode *));
|
|
|
|
int dovfsusermount = 0;
|
|
|
|
/*
|
|
* Virtual File System System Calls
|
|
*/
|
|
|
|
/*
|
|
* Mount a file system.
|
|
*/
|
|
|
|
#if defined(COMPAT_09) || defined(COMPAT_43)
|
|
/*
|
|
* This table is used to maintain compatibility with 4.3BSD
|
|
* and NetBSD 0.9 mount syscalls. Note, the order is important!
|
|
*
|
|
* Do not modify this table. It should only contain filesystems
|
|
* supported by NetBSD 0.9 and 4.3BSD.
|
|
*/
|
|
const char * const mountcompatnames[] = {
|
|
NULL, /* 0 = MOUNT_NONE */
|
|
MOUNT_FFS, /* 1 = MOUNT_UFS */
|
|
MOUNT_NFS, /* 2 */
|
|
MOUNT_MFS, /* 3 */
|
|
MOUNT_MSDOS, /* 4 */
|
|
MOUNT_CD9660, /* 5 = MOUNT_ISOFS */
|
|
MOUNT_FDESC, /* 6 */
|
|
MOUNT_KERNFS, /* 7 */
|
|
NULL, /* 8 = MOUNT_DEVFS */
|
|
MOUNT_AFS, /* 9 */
|
|
};
|
|
const int nmountcompatnames = sizeof(mountcompatnames) /
|
|
sizeof(mountcompatnames[0]);
|
|
#endif /* COMPAT_09 || COMPAT_43 */
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
sys_mount(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_mount_args /* {
|
|
syscallarg(const char *) type;
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) flags;
|
|
syscallarg(void *) data;
|
|
} */ *uap = v;
|
|
struct vnode *vp;
|
|
struct mount *mp;
|
|
int error, flag = 0;
|
|
char fstypename[MFSNAMELEN];
|
|
struct vattr va;
|
|
struct nameidata nd;
|
|
struct vfsops *vfs;
|
|
|
|
if (dovfsusermount == 0 && (error = suser(p->p_ucred, &p->p_acflag)))
|
|
return (error);
|
|
/*
|
|
* Get vnode to be covered
|
|
*/
|
|
NDINIT(&nd, LOOKUP, FOLLOW , UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
/*
|
|
* A lookup in VFS_MOUNT might result in an attempt to
|
|
* lock this vnode again, so make the lock resursive.
|
|
*/
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY | LK_SETRECURSE);
|
|
if (SCARG(uap, flags) & MNT_UPDATE) {
|
|
if ((vp->v_flag & VROOT) == 0) {
|
|
vput(vp);
|
|
return (EINVAL);
|
|
}
|
|
mp = vp->v_mount;
|
|
flag = mp->mnt_flag;
|
|
vfs = mp->mnt_op;
|
|
/*
|
|
* We only allow the filesystem to be reloaded if it
|
|
* is currently mounted read-only.
|
|
*/
|
|
if ((SCARG(uap, flags) & MNT_RELOAD) &&
|
|
((mp->mnt_flag & MNT_RDONLY) == 0)) {
|
|
vput(vp);
|
|
return (EOPNOTSUPP); /* Needs translation */
|
|
}
|
|
/*
|
|
* In "highly secure" mode, don't let the caller do anything
|
|
* but downgrade a filesystem from read-write to read-only.
|
|
* (see also below; MNT_UPDATE is required.)
|
|
*/
|
|
if (securelevel >= 2 &&
|
|
(SCARG(uap, flags) !=
|
|
(mp->mnt_flag | MNT_RDONLY |
|
|
MNT_RELOAD | MNT_FORCE | MNT_UPDATE))) {
|
|
vput(vp);
|
|
return (EPERM);
|
|
}
|
|
mp->mnt_flag |=
|
|
SCARG(uap, flags) & (MNT_RELOAD | MNT_FORCE | MNT_UPDATE);
|
|
/*
|
|
* Only root, or the user that did the original mount is
|
|
* permitted to update it.
|
|
*/
|
|
if (mp->mnt_stat.f_owner != p->p_ucred->cr_uid &&
|
|
(error = suser(p->p_ucred, &p->p_acflag)) != 0) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
/*
|
|
* Do not allow NFS export by non-root users. For non-root
|
|
* users, silently enforce MNT_NOSUID and MNT_NODEV, and
|
|
* MNT_NOEXEC if mount point is already MNT_NOEXEC.
|
|
*/
|
|
if (p->p_ucred->cr_uid != 0) {
|
|
if (SCARG(uap, flags) & MNT_EXPORTED) {
|
|
vput(vp);
|
|
return (EPERM);
|
|
}
|
|
SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;
|
|
if (flag & MNT_NOEXEC)
|
|
SCARG(uap, flags) |= MNT_NOEXEC;
|
|
}
|
|
if (vfs_busy(mp, LK_NOWAIT, 0)) {
|
|
vput(vp);
|
|
return (EPERM);
|
|
}
|
|
goto update;
|
|
} else {
|
|
if (securelevel >= 2) {
|
|
vput(vp);
|
|
return (EPERM);
|
|
}
|
|
}
|
|
/*
|
|
* If the user is not root, ensure that they own the directory
|
|
* onto which we are attempting to mount.
|
|
*/
|
|
if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)) != 0 ||
|
|
(va.va_uid != p->p_ucred->cr_uid &&
|
|
(error = suser(p->p_ucred, &p->p_acflag)) != 0)) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
/*
|
|
* Do not allow NFS export by non-root users. For non-root users,
|
|
* silently enforce MNT_NOSUID and MNT_NODEV, and MNT_NOEXEC if the
|
|
* mount point is already MNT_NOEXEC.
|
|
*/
|
|
if (p->p_ucred->cr_uid != 0) {
|
|
if (SCARG(uap, flags) & MNT_EXPORTED) {
|
|
vput(vp);
|
|
return (EPERM);
|
|
}
|
|
SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;
|
|
if (vp->v_mount->mnt_flag & MNT_NOEXEC)
|
|
SCARG(uap, flags) |= MNT_NOEXEC;
|
|
}
|
|
if ((error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 0)) != 0)
|
|
return (error);
|
|
if (vp->v_type != VDIR) {
|
|
vput(vp);
|
|
return (ENOTDIR);
|
|
}
|
|
error = copyinstr(SCARG(uap, type), fstypename, MFSNAMELEN, NULL);
|
|
if (error) {
|
|
#if defined(COMPAT_09) || defined(COMPAT_43)
|
|
/*
|
|
* Historically filesystem types were identified by number.
|
|
* If we get an integer for the filesystem type instead of a
|
|
* string, we check to see if it matches one of the historic
|
|
* filesystem types.
|
|
*/
|
|
u_long fsindex = (u_long)SCARG(uap, type);
|
|
if (fsindex >= nmountcompatnames ||
|
|
mountcompatnames[fsindex] == NULL) {
|
|
vput(vp);
|
|
return (ENODEV);
|
|
}
|
|
strncpy(fstypename, mountcompatnames[fsindex], MFSNAMELEN);
|
|
#else
|
|
vput(vp);
|
|
return (error);
|
|
#endif
|
|
}
|
|
#ifdef COMPAT_10
|
|
/* Accept `ufs' as an alias for `ffs'. */
|
|
if (!strncmp(fstypename, "ufs", MFSNAMELEN))
|
|
strncpy(fstypename, "ffs", MFSNAMELEN);
|
|
#endif
|
|
if ((vfs = vfs_getopsbyname(fstypename)) == NULL) {
|
|
vput(vp);
|
|
return (ENODEV);
|
|
}
|
|
if (vp->v_mountedhere != NULL) {
|
|
vput(vp);
|
|
return (EBUSY);
|
|
}
|
|
|
|
/*
|
|
* Allocate and initialize the file system.
|
|
*/
|
|
mp = (struct mount *)malloc((u_long)sizeof(struct mount),
|
|
M_MOUNT, M_WAITOK);
|
|
memset((char *)mp, 0, (u_long)sizeof(struct mount));
|
|
lockinit(&mp->mnt_lock, PVFS, "vfslock", 0, 0);
|
|
(void)vfs_busy(mp, LK_NOWAIT, 0);
|
|
mp->mnt_op = vfs;
|
|
vfs->vfs_refcount++;
|
|
mp->mnt_vnodecovered = vp;
|
|
mp->mnt_stat.f_owner = p->p_ucred->cr_uid;
|
|
mp->mnt_unmounter = NULL;
|
|
update:
|
|
/*
|
|
* Set the mount level flags.
|
|
*/
|
|
if (SCARG(uap, flags) & MNT_RDONLY)
|
|
mp->mnt_flag |= MNT_RDONLY;
|
|
else if (mp->mnt_flag & MNT_RDONLY)
|
|
mp->mnt_flag |= MNT_WANTRDWR;
|
|
mp->mnt_flag &=~ (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |
|
|
MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOCOREDUMP |
|
|
MNT_NOATIME | MNT_NODEVMTIME | MNT_SYMPERM | MNT_SOFTDEP);
|
|
mp->mnt_flag |= SCARG(uap, flags) & (MNT_NOSUID | MNT_NOEXEC |
|
|
MNT_NODEV | MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC |
|
|
MNT_NOCOREDUMP | MNT_IGNORE | MNT_NOATIME | MNT_NODEVMTIME |
|
|
MNT_SYMPERM | MNT_SOFTDEP);
|
|
/*
|
|
* Mount the filesystem.
|
|
*/
|
|
error = VFS_MOUNT(mp, SCARG(uap, path), SCARG(uap, data), &nd, p);
|
|
if (mp->mnt_flag & MNT_UPDATE) {
|
|
if (mp->mnt_flag & MNT_WANTRDWR)
|
|
mp->mnt_flag &= ~MNT_RDONLY;
|
|
mp->mnt_flag &=~
|
|
(MNT_UPDATE | MNT_RELOAD | MNT_FORCE | MNT_WANTRDWR);
|
|
if (error)
|
|
mp->mnt_flag = flag;
|
|
if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0) {
|
|
if (mp->mnt_syncer == NULL)
|
|
error = vfs_allocate_syncvnode(mp);
|
|
} else {
|
|
if (mp->mnt_syncer != NULL)
|
|
vfs_deallocate_syncvnode(mp);
|
|
}
|
|
vfs_unbusy(mp);
|
|
VOP_UNLOCK(vp, 0);
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
/*
|
|
* Put the new filesystem on the mount list after root.
|
|
*/
|
|
cache_purge(vp);
|
|
if (!error) {
|
|
vp->v_mountedhere = mp;
|
|
simple_lock(&mountlist_slock);
|
|
CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
|
|
simple_unlock(&mountlist_slock);
|
|
checkdirs(vp);
|
|
VOP_UNLOCK(vp, 0);
|
|
if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0)
|
|
error = vfs_allocate_syncvnode(mp);
|
|
vfs_unbusy(mp);
|
|
(void) VFS_STATFS(mp, &mp->mnt_stat, p);
|
|
if ((error = VFS_START(mp, 0, p)))
|
|
vrele(vp);
|
|
} else {
|
|
vp->v_mountedhere = (struct mount *)0;
|
|
vfs->vfs_refcount--;
|
|
vfs_unbusy(mp);
|
|
free((caddr_t)mp, M_MOUNT);
|
|
vput(vp);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Scan all active processes to see if any of them have a current
|
|
* or root directory onto which the new filesystem has just been
|
|
* mounted. If so, replace them with the new mount point.
|
|
*/
|
|
void
|
|
checkdirs(olddp)
|
|
struct vnode *olddp;
|
|
{
|
|
struct cwdinfo *cwdi;
|
|
struct vnode *newdp;
|
|
struct proc *p;
|
|
|
|
if (olddp->v_usecount == 1)
|
|
return;
|
|
if (VFS_ROOT(olddp->v_mountedhere, &newdp))
|
|
panic("mount: lost mount");
|
|
proclist_lock_read();
|
|
for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
|
|
cwdi = p->p_cwdi;
|
|
if (cwdi->cwdi_cdir == olddp) {
|
|
vrele(cwdi->cwdi_cdir);
|
|
VREF(newdp);
|
|
cwdi->cwdi_cdir = newdp;
|
|
}
|
|
if (cwdi->cwdi_rdir == olddp) {
|
|
vrele(cwdi->cwdi_rdir);
|
|
VREF(newdp);
|
|
cwdi->cwdi_rdir = newdp;
|
|
}
|
|
}
|
|
proclist_unlock_read();
|
|
if (rootvnode == olddp) {
|
|
vrele(rootvnode);
|
|
VREF(newdp);
|
|
rootvnode = newdp;
|
|
}
|
|
vput(newdp);
|
|
}
|
|
|
|
/*
|
|
* Unmount a file system.
|
|
*
|
|
* Note: unmount takes a path to the vnode mounted on as argument,
|
|
* not special file (as before).
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_unmount(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_unmount_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) flags;
|
|
} */ *uap = v;
|
|
struct vnode *vp;
|
|
struct mount *mp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
mp = vp->v_mount;
|
|
|
|
/*
|
|
* Only root, or the user that did the original mount is
|
|
* permitted to unmount this filesystem.
|
|
*/
|
|
if ((mp->mnt_stat.f_owner != p->p_ucred->cr_uid) &&
|
|
(error = suser(p->p_ucred, &p->p_acflag)) != 0) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Don't allow unmounting the root file system.
|
|
*/
|
|
if (mp->mnt_flag & MNT_ROOTFS) {
|
|
vput(vp);
|
|
return (EINVAL);
|
|
}
|
|
|
|
/*
|
|
* Must be the root of the filesystem
|
|
*/
|
|
if ((vp->v_flag & VROOT) == 0) {
|
|
vput(vp);
|
|
return (EINVAL);
|
|
}
|
|
vput(vp);
|
|
|
|
/*
|
|
* XXX Freeze syncer. Must do this before locking the
|
|
* mount point. See dounmount() for details.
|
|
*/
|
|
lockmgr(&syncer_lock, LK_EXCLUSIVE, NULL);
|
|
|
|
if (vfs_busy(mp, 0, 0)) {
|
|
lockmgr(&syncer_lock, LK_RELEASE, NULL);
|
|
return (EBUSY);
|
|
}
|
|
|
|
return (dounmount(mp, SCARG(uap, flags), p));
|
|
}
|
|
|
|
/*
|
|
* Do the actual file system unmount. File system is assumed to have been
|
|
* marked busy by the caller.
|
|
*/
|
|
int
|
|
dounmount(mp, flags, p)
|
|
struct mount *mp;
|
|
int flags;
|
|
struct proc *p;
|
|
{
|
|
struct vnode *coveredvp;
|
|
int error;
|
|
int async;
|
|
int used_syncer;
|
|
|
|
simple_lock(&mountlist_slock);
|
|
vfs_unbusy(mp);
|
|
used_syncer = (mp->mnt_syncer != NULL);
|
|
|
|
/*
|
|
* XXX Syncer must be frozen when we get here. This should really
|
|
* be done on a per-mountpoint basis, but especially the softdep
|
|
* code possibly called from the syncer doens't exactly work on a
|
|
* per-mountpoint basis, so the softdep code would become a maze
|
|
* of vfs_busy() calls.
|
|
*
|
|
* The caller of dounmount() must acquire syncer_lock because
|
|
* the syncer itself acquires locks in syncer_lock -> vfs_busy
|
|
* order, and we must preserve that order to avoid deadlock.
|
|
*
|
|
* So, if the file system did not use the syncer, now is
|
|
* the time to release the syncer_lock.
|
|
*/
|
|
if (used_syncer == 0)
|
|
lockmgr(&syncer_lock, LK_RELEASE, NULL);
|
|
|
|
mp->mnt_flag |= MNT_UNMOUNT;
|
|
mp->mnt_unmounter = p;
|
|
lockmgr(&mp->mnt_lock, LK_DRAIN | LK_INTERLOCK, &mountlist_slock);
|
|
if (mp->mnt_flag & MNT_EXPUBLIC)
|
|
vfs_setpublicfs(NULL, NULL, NULL);
|
|
async = mp->mnt_flag & MNT_ASYNC;
|
|
mp->mnt_flag &= ~MNT_ASYNC;
|
|
cache_purgevfs(mp); /* remove cache entries for this file sys */
|
|
if (mp->mnt_syncer != NULL)
|
|
vfs_deallocate_syncvnode(mp);
|
|
if (((mp->mnt_flag & MNT_RDONLY) ||
|
|
(error = VFS_SYNC(mp, MNT_WAIT, p->p_ucred, p)) == 0) ||
|
|
(flags & MNT_FORCE))
|
|
error = VFS_UNMOUNT(mp, flags, p);
|
|
simple_lock(&mountlist_slock);
|
|
if (error) {
|
|
if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0)
|
|
(void) vfs_allocate_syncvnode(mp);
|
|
mp->mnt_flag &= ~MNT_UNMOUNT;
|
|
mp->mnt_unmounter = NULL;
|
|
mp->mnt_flag |= async;
|
|
lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK | LK_REENABLE,
|
|
&mountlist_slock);
|
|
if (used_syncer)
|
|
lockmgr(&syncer_lock, LK_RELEASE, NULL);
|
|
while (mp->mnt_wcnt > 0) {
|
|
wakeup((caddr_t)mp);
|
|
tsleep(&mp->mnt_wcnt, PVFS, "mntwcnt1", 0);
|
|
}
|
|
return (error);
|
|
}
|
|
CIRCLEQ_REMOVE(&mountlist, mp, mnt_list);
|
|
if ((coveredvp = mp->mnt_vnodecovered) != NULLVP) {
|
|
coveredvp->v_mountedhere = NULL;
|
|
vrele(coveredvp);
|
|
}
|
|
mp->mnt_op->vfs_refcount--;
|
|
if (mp->mnt_vnodelist.lh_first != NULL)
|
|
panic("unmount: dangling vnode");
|
|
mp->mnt_flag |= MNT_GONE;
|
|
lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK, &mountlist_slock);
|
|
if (used_syncer)
|
|
lockmgr(&syncer_lock, LK_RELEASE, NULL);
|
|
while(mp->mnt_wcnt > 0) {
|
|
wakeup((caddr_t)mp);
|
|
tsleep(&mp->mnt_wcnt, PVFS, "mntwcnt2", 0);
|
|
}
|
|
free((caddr_t)mp, M_MOUNT);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Sync each mounted filesystem.
|
|
*/
|
|
#ifdef DEBUG
|
|
int syncprt = 0;
|
|
struct ctldebug debug0 = { "syncprt", &syncprt };
|
|
#endif
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
sys_sync(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct mount *mp, *nmp;
|
|
int asyncflag;
|
|
|
|
simple_lock(&mountlist_slock);
|
|
for (mp = mountlist.cqh_last; mp != (void *)&mountlist; mp = nmp) {
|
|
if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) {
|
|
nmp = mp->mnt_list.cqe_prev;
|
|
continue;
|
|
}
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0) {
|
|
asyncflag = mp->mnt_flag & MNT_ASYNC;
|
|
mp->mnt_flag &= ~MNT_ASYNC;
|
|
VFS_SYNC(mp, MNT_NOWAIT, p->p_ucred, p);
|
|
if (asyncflag)
|
|
mp->mnt_flag |= MNT_ASYNC;
|
|
}
|
|
simple_lock(&mountlist_slock);
|
|
nmp = mp->mnt_list.cqe_prev;
|
|
vfs_unbusy(mp);
|
|
|
|
}
|
|
simple_unlock(&mountlist_slock);
|
|
#ifdef DEBUG
|
|
if (syncprt)
|
|
vfs_bufstats();
|
|
#endif /* DEBUG */
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Change filesystem quotas.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_quotactl(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_quotactl_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) cmd;
|
|
syscallarg(int) uid;
|
|
syscallarg(caddr_t) arg;
|
|
} */ *uap = v;
|
|
struct mount *mp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
mp = nd.ni_vp->v_mount;
|
|
vrele(nd.ni_vp);
|
|
return (VFS_QUOTACTL(mp, SCARG(uap, cmd), SCARG(uap, uid),
|
|
SCARG(uap, arg), p));
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_statfs(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_statfs_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(struct statfs *) buf;
|
|
} */ *uap = v;
|
|
struct mount *mp;
|
|
struct statfs *sp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
mp = nd.ni_vp->v_mount;
|
|
sp = &mp->mnt_stat;
|
|
vrele(nd.ni_vp);
|
|
if ((error = VFS_STATFS(mp, sp, p)) != 0)
|
|
return (error);
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
sp->f_oflags = sp->f_flags & 0xffff;
|
|
return (copyout(sp, SCARG(uap, buf), sizeof(*sp)));
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_fstatfs(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_fstatfs_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(struct statfs *) buf;
|
|
} */ *uap = v;
|
|
struct file *fp;
|
|
struct mount *mp;
|
|
struct statfs *sp;
|
|
int error;
|
|
|
|
/* getvnode() will use the descriptor for us */
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
mp = ((struct vnode *)fp->f_data)->v_mount;
|
|
sp = &mp->mnt_stat;
|
|
if ((error = VFS_STATFS(mp, sp, p)) != 0)
|
|
goto out;
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
sp->f_oflags = sp->f_flags & 0xffff;
|
|
error = copyout(sp, SCARG(uap, buf), sizeof(*sp));
|
|
out:
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get statistics on all filesystems.
|
|
*/
|
|
int
|
|
sys_getfsstat(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_getfsstat_args /* {
|
|
syscallarg(struct statfs *) buf;
|
|
syscallarg(long) bufsize;
|
|
syscallarg(int) flags;
|
|
} */ *uap = v;
|
|
struct mount *mp, *nmp;
|
|
struct statfs *sp;
|
|
caddr_t sfsp;
|
|
long count, maxcount, error;
|
|
|
|
maxcount = SCARG(uap, bufsize) / sizeof(struct statfs);
|
|
sfsp = (caddr_t)SCARG(uap, buf);
|
|
simple_lock(&mountlist_slock);
|
|
count = 0;
|
|
for (mp = mountlist.cqh_first; mp != (void *)&mountlist; mp = nmp) {
|
|
if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) {
|
|
nmp = mp->mnt_list.cqe_next;
|
|
continue;
|
|
}
|
|
if (sfsp && count < maxcount) {
|
|
sp = &mp->mnt_stat;
|
|
/*
|
|
* If MNT_NOWAIT or MNT_LAZY is specified, do not
|
|
* refresh the fsstat cache. MNT_WAIT or MNT_LAXY
|
|
* overrides MNT_NOWAIT.
|
|
*/
|
|
if (SCARG(uap, flags) != MNT_NOWAIT &&
|
|
SCARG(uap, flags) != MNT_LAZY &&
|
|
(SCARG(uap, flags) == MNT_WAIT ||
|
|
SCARG(uap, flags) == 0) &&
|
|
(error = VFS_STATFS(mp, sp, p)) != 0) {
|
|
simple_lock(&mountlist_slock);
|
|
nmp = mp->mnt_list.cqe_next;
|
|
vfs_unbusy(mp);
|
|
continue;
|
|
}
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
sp->f_oflags = sp->f_flags & 0xffff;
|
|
error = copyout(sp, sfsp, sizeof(*sp));
|
|
if (error) {
|
|
vfs_unbusy(mp);
|
|
return (error);
|
|
}
|
|
sfsp += sizeof(*sp);
|
|
}
|
|
count++;
|
|
simple_lock(&mountlist_slock);
|
|
nmp = mp->mnt_list.cqe_next;
|
|
vfs_unbusy(mp);
|
|
}
|
|
simple_unlock(&mountlist_slock);
|
|
if (sfsp && count > maxcount)
|
|
*retval = maxcount;
|
|
else
|
|
*retval = count;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Change current working directory to a given file descriptor.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_fchdir(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_fchdir_args /* {
|
|
syscallarg(int) fd;
|
|
} */ *uap = v;
|
|
struct filedesc *fdp = p->p_fd;
|
|
struct cwdinfo *cwdi = p->p_cwdi;
|
|
struct vnode *vp, *tdp;
|
|
struct mount *mp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
/* getvnode() will use the descriptor for us */
|
|
if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
|
|
VREF(vp);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
if (vp->v_type != VDIR)
|
|
error = ENOTDIR;
|
|
else
|
|
error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);
|
|
while (!error && (mp = vp->v_mountedhere) != NULL) {
|
|
if (vfs_busy(mp, 0, 0))
|
|
continue;
|
|
error = VFS_ROOT(mp, &tdp);
|
|
vfs_unbusy(mp);
|
|
if (error)
|
|
break;
|
|
vput(vp);
|
|
vp = tdp;
|
|
}
|
|
if (error) {
|
|
vput(vp);
|
|
goto out;
|
|
}
|
|
VOP_UNLOCK(vp, 0);
|
|
|
|
/*
|
|
* Disallow changing to a directory not under the process's
|
|
* current root directory (if there is one).
|
|
*/
|
|
if (cwdi->cwdi_rdir && !vn_isunder(vp, NULL, p)) {
|
|
vrele(vp);
|
|
error = EPERM; /* operation not permitted */
|
|
goto out;
|
|
}
|
|
|
|
vrele(cwdi->cwdi_cdir);
|
|
cwdi->cwdi_cdir = vp;
|
|
out:
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change this process's notion of the root directory to a given file descriptor.
|
|
*/
|
|
|
|
int
|
|
sys_fchroot(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_fchroot_args *uap = v;
|
|
struct filedesc *fdp = p->p_fd;
|
|
struct cwdinfo *cwdi = p->p_cwdi;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
|
|
return error;
|
|
/* getvnode() will use the descriptor for us */
|
|
if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0)
|
|
return error;
|
|
vp = (struct vnode *) fp->f_data;
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
if (vp->v_type != VDIR)
|
|
error = ENOTDIR;
|
|
else
|
|
error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);
|
|
VOP_UNLOCK(vp, 0);
|
|
if (error)
|
|
goto out;
|
|
VREF(vp);
|
|
|
|
/*
|
|
* Prevent escaping from chroot by putting the root under
|
|
* the working directory. Silently chdir to / if we aren't
|
|
* already there.
|
|
*/
|
|
if (!vn_isunder(cwdi->cwdi_cdir, vp, p)) {
|
|
/*
|
|
* XXX would be more failsafe to change directory to a
|
|
* deadfs node here instead
|
|
*/
|
|
vrele(cwdi->cwdi_cdir);
|
|
VREF(vp);
|
|
cwdi->cwdi_cdir = vp;
|
|
}
|
|
|
|
if (cwdi->cwdi_rdir != NULL)
|
|
vrele(cwdi->cwdi_rdir);
|
|
cwdi->cwdi_rdir = vp;
|
|
out:
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Change current working directory (``.'').
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_chdir(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_chdir_args /* {
|
|
syscallarg(const char *) path;
|
|
} */ *uap = v;
|
|
struct cwdinfo *cwdi = p->p_cwdi;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = change_dir(&nd, p)) != 0)
|
|
return (error);
|
|
vrele(cwdi->cwdi_cdir);
|
|
cwdi->cwdi_cdir = nd.ni_vp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Change notion of root (``/'') directory.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_chroot(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_chroot_args /* {
|
|
syscallarg(const char *) path;
|
|
} */ *uap = v;
|
|
struct cwdinfo *cwdi = p->p_cwdi;
|
|
struct vnode *vp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = change_dir(&nd, p)) != 0)
|
|
return (error);
|
|
if (cwdi->cwdi_rdir != NULL)
|
|
vrele(cwdi->cwdi_rdir);
|
|
vp = nd.ni_vp;
|
|
cwdi->cwdi_rdir = vp;
|
|
|
|
/*
|
|
* Prevent escaping from chroot by putting the root under
|
|
* the working directory. Silently chdir to / if we aren't
|
|
* already there.
|
|
*/
|
|
if (!vn_isunder(cwdi->cwdi_cdir, vp, p)) {
|
|
/*
|
|
* XXX would be more failsafe to change directory to a
|
|
* deadfs node here instead
|
|
*/
|
|
vrele(cwdi->cwdi_cdir);
|
|
VREF(vp);
|
|
cwdi->cwdi_cdir = vp;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Common routine for chroot and chdir.
|
|
*/
|
|
static int
|
|
change_dir(ndp, p)
|
|
struct nameidata *ndp;
|
|
struct proc *p;
|
|
{
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
if ((error = namei(ndp)) != 0)
|
|
return (error);
|
|
vp = ndp->ni_vp;
|
|
if (vp->v_type != VDIR)
|
|
error = ENOTDIR;
|
|
else
|
|
error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);
|
|
|
|
if (error)
|
|
vput(vp);
|
|
else
|
|
VOP_UNLOCK(vp, 0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check permissions, allocate an open file structure,
|
|
* and call the device open routine if any.
|
|
*/
|
|
int
|
|
sys_open(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_open_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) flags;
|
|
syscallarg(int) mode;
|
|
} */ *uap = v;
|
|
struct cwdinfo *cwdi = p->p_cwdi;
|
|
struct filedesc *fdp = p->p_fd;
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
int flags, cmode;
|
|
int type, indx, error;
|
|
struct flock lf;
|
|
struct nameidata nd;
|
|
|
|
flags = FFLAGS(SCARG(uap, flags));
|
|
if ((flags & (FREAD | FWRITE)) == 0)
|
|
return (EINVAL);
|
|
/* falloc() will use the file descriptor for us */
|
|
if ((error = falloc(p, &fp, &indx)) != 0)
|
|
return (error);
|
|
cmode = ((SCARG(uap, mode) &~ cwdi->cwdi_cmask) & ALLPERMS) &~ S_ISTXT;
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
p->p_dupfd = -indx - 1; /* XXX check for fdopen */
|
|
if ((error = vn_open(&nd, flags, cmode)) != 0) {
|
|
FILE_UNUSE(fp, p);
|
|
ffree(fp);
|
|
if ((error == ENODEV || error == ENXIO) &&
|
|
p->p_dupfd >= 0 && /* XXX from fdopen */
|
|
(error =
|
|
dupfdopen(p, indx, p->p_dupfd, flags, error)) == 0) {
|
|
*retval = indx;
|
|
return (0);
|
|
}
|
|
if (error == ERESTART)
|
|
error = EINTR;
|
|
fdremove(fdp, indx);
|
|
return (error);
|
|
}
|
|
p->p_dupfd = 0;
|
|
vp = nd.ni_vp;
|
|
fp->f_flag = flags & FMASK;
|
|
fp->f_type = DTYPE_VNODE;
|
|
fp->f_ops = &vnops;
|
|
fp->f_data = (caddr_t)vp;
|
|
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;
|
|
VOP_UNLOCK(vp, 0);
|
|
error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type);
|
|
if (error) {
|
|
(void) vn_close(vp, fp->f_flag, fp->f_cred, p);
|
|
FILE_UNUSE(fp, p);
|
|
ffree(fp);
|
|
fdremove(fdp, indx);
|
|
return (error);
|
|
}
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
fp->f_flag |= FHASLOCK;
|
|
}
|
|
VOP_UNLOCK(vp, 0);
|
|
*retval = indx;
|
|
FILE_SET_MATURE(fp);
|
|
FILE_UNUSE(fp, p);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Get file handle system call
|
|
*/
|
|
int
|
|
sys_getfh(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_getfh_args /* {
|
|
syscallarg(char *) fname;
|
|
syscallarg(fhandle_t *) fhp;
|
|
} */ *uap = v;
|
|
struct vnode *vp;
|
|
fhandle_t fh;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
/*
|
|
* Must be super user
|
|
*/
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, fname), p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
memset((caddr_t)&fh, 0, sizeof(fh));
|
|
fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid;
|
|
error = VFS_VPTOFH(vp, &fh.fh_fid);
|
|
vput(vp);
|
|
if (error)
|
|
return (error);
|
|
error = copyout((caddr_t)&fh, (caddr_t)SCARG(uap, fhp), sizeof (fh));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Open a file given a file handle.
|
|
*
|
|
* Check permissions, allocate an open file structure,
|
|
* and call the device open routine if any.
|
|
*/
|
|
int
|
|
sys_fhopen(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_fhopen_args /* {
|
|
syscallarg(const fhandle_t *) fhp;
|
|
syscallarg(int) flags;
|
|
} */ *uap = v;
|
|
struct filedesc *fdp = p->p_fd;
|
|
struct file *fp;
|
|
struct vnode *vp = NULL;
|
|
struct mount *mp;
|
|
struct ucred *cred = p->p_ucred;
|
|
int flags;
|
|
struct file *nfp;
|
|
int type, indx, error=0;
|
|
struct flock lf;
|
|
struct vattr va;
|
|
fhandle_t fh;
|
|
|
|
/*
|
|
* Must be super user
|
|
*/
|
|
if ((error = suser(p->p_ucred, &p->p_acflag)))
|
|
return (error);
|
|
|
|
flags = FFLAGS(SCARG(uap, flags));
|
|
if ((flags & (FREAD | FWRITE)) == 0)
|
|
return (EINVAL);
|
|
if ((flags & O_CREAT))
|
|
return (EINVAL);
|
|
/* falloc() will use the file descriptor for us */
|
|
if ((error = falloc(p, &nfp, &indx)) != 0)
|
|
return (error);
|
|
fp = nfp;
|
|
if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0)
|
|
goto bad;
|
|
|
|
if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) {
|
|
error = ESTALE;
|
|
goto bad;
|
|
}
|
|
|
|
if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)) != 0) {
|
|
vp = NULL; /* most likely unnecessary sanity for bad: */
|
|
goto bad;
|
|
}
|
|
|
|
/* Now do an effective vn_open */
|
|
|
|
if (vp->v_type == VSOCK) {
|
|
error = EOPNOTSUPP;
|
|
goto bad;
|
|
}
|
|
if (flags & FREAD) {
|
|
if ((error = VOP_ACCESS(vp, VREAD, cred, p)) != 0)
|
|
goto bad;
|
|
}
|
|
if (flags & (FWRITE | O_TRUNC)) {
|
|
if (vp->v_type == VDIR) {
|
|
error = EISDIR;
|
|
goto bad;
|
|
}
|
|
if ((error = vn_writechk(vp)) != 0 ||
|
|
(error = VOP_ACCESS(vp, VWRITE, cred, p)) != 0)
|
|
goto bad;
|
|
}
|
|
if (flags & O_TRUNC) {
|
|
VOP_UNLOCK(vp, 0); /* XXX */
|
|
VOP_LEASE(vp, p, cred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); /* XXX */
|
|
VATTR_NULL(&va);
|
|
va.va_size = 0;
|
|
if ((error = VOP_SETATTR(vp, &va, cred, p)) != 0)
|
|
goto bad;
|
|
}
|
|
if ((error = VOP_OPEN(vp, flags, cred, p)) != 0)
|
|
goto bad;
|
|
if (vp->v_type == VREG &&
|
|
uvn_attach(vp, flags & FWRITE ? VM_PROT_WRITE : 0) == NULL) {
|
|
error = EIO;
|
|
goto bad;
|
|
}
|
|
if (flags & FWRITE)
|
|
vp->v_writecount++;
|
|
|
|
/* done with modified vn_open, now finish what sys_open does. */
|
|
|
|
fp->f_flag = flags & FMASK;
|
|
fp->f_type = DTYPE_VNODE;
|
|
fp->f_ops = &vnops;
|
|
fp->f_data = (caddr_t)vp;
|
|
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;
|
|
VOP_UNLOCK(vp, 0);
|
|
error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type);
|
|
if (error) {
|
|
(void) vn_close(vp, fp->f_flag, fp->f_cred, p);
|
|
FILE_UNUSE(fp, p);
|
|
ffree(fp);
|
|
fdremove(fdp, indx);
|
|
return (error);
|
|
}
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
fp->f_flag |= FHASLOCK;
|
|
}
|
|
VOP_UNLOCK(vp, 0);
|
|
*retval = indx;
|
|
FILE_SET_MATURE(fp);
|
|
FILE_UNUSE(fp, p);
|
|
return (0);
|
|
|
|
bad:
|
|
FILE_UNUSE(fp, p);
|
|
ffree(fp);
|
|
fdremove(fdp, indx);
|
|
if (vp != NULL)
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
sys_fhstat(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_fhstat_args /* {
|
|
syscallarg(const fhandle_t *) fhp;
|
|
syscallarg(struct stat *) sb;
|
|
} */ *uap = v;
|
|
struct stat sb;
|
|
int error;
|
|
fhandle_t fh;
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
|
|
/*
|
|
* Must be super user
|
|
*/
|
|
if ((error = suser(p->p_ucred, &p->p_acflag)))
|
|
return (error);
|
|
|
|
if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0)
|
|
return (error);
|
|
|
|
if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL)
|
|
return (ESTALE);
|
|
if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)))
|
|
return (error);
|
|
error = vn_stat(vp, &sb, p);
|
|
vput(vp);
|
|
if (error)
|
|
return (error);
|
|
error = copyout(&sb, SCARG(uap, sb), sizeof(sb));
|
|
return (error);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
sys_fhstatfs(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_fhstatfs_args /*
|
|
syscallarg(const fhandle_t *) fhp;
|
|
syscallarg(struct statfs *) buf;
|
|
} */ *uap = v;
|
|
struct statfs sp;
|
|
fhandle_t fh;
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
/*
|
|
* Must be super user
|
|
*/
|
|
if ((error = suser(p->p_ucred, &p->p_acflag)))
|
|
return (error);
|
|
|
|
if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0)
|
|
return (error);
|
|
|
|
if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL)
|
|
return (ESTALE);
|
|
if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)))
|
|
return (error);
|
|
mp = vp->v_mount;
|
|
vput(vp);
|
|
if ((error = VFS_STATFS(mp, &sp, p)) != 0)
|
|
return (error);
|
|
sp.f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
sp.f_oflags = sp.f_flags & 0xffff;
|
|
return (copyout(&sp, SCARG(uap, buf), sizeof(sp)));
|
|
}
|
|
|
|
/*
|
|
* Create a special file.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_mknod(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_mknod_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) mode;
|
|
syscallarg(int) dev;
|
|
} */ *uap = v;
|
|
struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
int whiteout = 0;
|
|
struct nameidata nd;
|
|
|
|
if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
|
|
return (error);
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp != NULL)
|
|
error = EEXIST;
|
|
else {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode =
|
|
(SCARG(uap, mode) & ALLPERMS) &~ p->p_cwdi->cwdi_cmask;
|
|
vattr.va_rdev = SCARG(uap, dev);
|
|
whiteout = 0;
|
|
|
|
switch (SCARG(uap, 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 (!error) {
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
if (whiteout) {
|
|
error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, CREATE);
|
|
if (error)
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
vput(nd.ni_dvp);
|
|
} else {
|
|
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp,
|
|
&nd.ni_cnd, &vattr);
|
|
if (error == 0)
|
|
vput(nd.ni_vp);
|
|
}
|
|
} else {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
if (vp)
|
|
vrele(vp);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Create a named pipe.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_mkfifo(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_mkfifo_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap = v;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
if (nd.ni_vp != NULL) {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(nd.ni_vp);
|
|
return (EEXIST);
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_type = VFIFO;
|
|
vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_cwdi->cwdi_cmask;
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
|
|
if (error == 0)
|
|
vput(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a hard file link.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_link(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_link_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(const char *) link;
|
|
} */ *uap = v;
|
|
struct vnode *vp;
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, link), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
goto out;
|
|
if (nd.ni_vp) {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(nd.ni_vp);
|
|
error = EEXIST;
|
|
goto out;
|
|
}
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd);
|
|
out:
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a symbolic link.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_symlink(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_symlink_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(const char *) link;
|
|
} */ *uap = v;
|
|
struct vattr vattr;
|
|
char *path;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
path = PNBUF_GET();
|
|
error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, NULL);
|
|
if (error)
|
|
goto out;
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, link), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
goto out;
|
|
if (nd.ni_vp) {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(nd.ni_vp);
|
|
error = EEXIST;
|
|
goto out;
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = ACCESSPERMS &~ p->p_cwdi->cwdi_cmask;
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, path);
|
|
if (error == 0)
|
|
vput(nd.ni_vp);
|
|
out:
|
|
PNBUF_PUT(path);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Delete a whiteout from the filesystem.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_undelete(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_undelete_args /* {
|
|
syscallarg(const char *) path;
|
|
} */ *uap = v;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, DELETE, LOCKPARENT|DOWHITEOUT, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
|
|
if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & ISWHITEOUT)) {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
if (nd.ni_vp)
|
|
vrele(nd.ni_vp);
|
|
return (EEXIST);
|
|
}
|
|
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
if ((error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, DELETE)) != 0)
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
vput(nd.ni_dvp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Delete a name from the filesystem.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_unlink(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_unlink_args /* {
|
|
syscallarg(const char *) path;
|
|
} */ *uap = v;
|
|
struct vnode *vp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
|
|
/*
|
|
* The root of a mounted filesystem cannot be deleted.
|
|
*/
|
|
if (vp->v_flag & VROOT) {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vput(vp);
|
|
error = EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
|
|
out:
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Reposition read/write file offset.
|
|
*/
|
|
int
|
|
sys_lseek(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_lseek_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) offset;
|
|
syscallarg(int) whence;
|
|
} */ *uap = v;
|
|
struct ucred *cred = p->p_ucred;
|
|
struct filedesc *fdp = p->p_fd;
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
struct vattr vattr;
|
|
off_t newoff;
|
|
int error;
|
|
|
|
if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL)
|
|
return (EBADF);
|
|
|
|
FILE_USE(fp);
|
|
|
|
vp = (struct vnode *)fp->f_data;
|
|
if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {
|
|
error = ESPIPE;
|
|
goto out;
|
|
}
|
|
|
|
switch (SCARG(uap, whence)) {
|
|
case SEEK_CUR:
|
|
newoff = fp->f_offset + SCARG(uap, offset);
|
|
break;
|
|
case SEEK_END:
|
|
error = VOP_GETATTR(vp, &vattr, cred, p);
|
|
if (error)
|
|
goto out;
|
|
newoff = SCARG(uap, offset) + vattr.va_size;
|
|
break;
|
|
case SEEK_SET:
|
|
newoff = SCARG(uap, offset);
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
if ((error = VOP_SEEK(vp, fp->f_offset, newoff, cred)) != 0)
|
|
goto out;
|
|
|
|
*(off_t *)retval = fp->f_offset = newoff;
|
|
out:
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Positional read system call.
|
|
*/
|
|
int
|
|
sys_pread(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_pread_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(void *) buf;
|
|
syscallarg(size_t) nbyte;
|
|
syscallarg(off_t) offset;
|
|
} */ *uap = v;
|
|
struct filedesc *fdp = p->p_fd;
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
off_t offset;
|
|
int error, fd = SCARG(uap, fd);
|
|
|
|
if ((fp = fd_getfile(fdp, fd)) == NULL)
|
|
return (EBADF);
|
|
|
|
if ((fp->f_flag & FREAD) == 0)
|
|
return (EBADF);
|
|
|
|
FILE_USE(fp);
|
|
|
|
vp = (struct vnode *)fp->f_data;
|
|
if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {
|
|
error = ESPIPE;
|
|
goto out;
|
|
}
|
|
|
|
offset = SCARG(uap, offset);
|
|
|
|
/*
|
|
* XXX This works because no file systems actually
|
|
* XXX take any action on the seek operation.
|
|
*/
|
|
if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0)
|
|
goto out;
|
|
|
|
/* dofileread() will unuse the descriptor for us */
|
|
return (dofileread(p, fd, fp, SCARG(uap, buf), SCARG(uap, nbyte),
|
|
&offset, 0, retval));
|
|
|
|
out:
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Positional scatter read system call.
|
|
*/
|
|
int
|
|
sys_preadv(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_preadv_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(const struct iovec *) iovp;
|
|
syscallarg(int) iovcnt;
|
|
syscallarg(off_t) offset;
|
|
} */ *uap = v;
|
|
struct filedesc *fdp = p->p_fd;
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
off_t offset;
|
|
int error, fd = SCARG(uap, fd);
|
|
|
|
if ((fp = fd_getfile(fdp, fd)) == NULL)
|
|
return (EBADF);
|
|
|
|
if ((fp->f_flag & FREAD) == 0)
|
|
return (EBADF);
|
|
|
|
FILE_USE(fp);
|
|
|
|
vp = (struct vnode *)fp->f_data;
|
|
if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {
|
|
error = ESPIPE;
|
|
goto out;
|
|
}
|
|
|
|
offset = SCARG(uap, offset);
|
|
|
|
/*
|
|
* XXX This works because no file systems actually
|
|
* XXX take any action on the seek operation.
|
|
*/
|
|
if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0)
|
|
goto out;
|
|
|
|
/* dofilereadv() will unuse the descriptor for us */
|
|
return (dofilereadv(p, fd, fp, SCARG(uap, iovp), SCARG(uap, iovcnt),
|
|
&offset, 0, retval));
|
|
|
|
out:
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Positional write system call.
|
|
*/
|
|
int
|
|
sys_pwrite(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_pwrite_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(const void *) buf;
|
|
syscallarg(size_t) nbyte;
|
|
syscallarg(off_t) offset;
|
|
} */ *uap = v;
|
|
struct filedesc *fdp = p->p_fd;
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
off_t offset;
|
|
int error, fd = SCARG(uap, fd);
|
|
|
|
if ((fp = fd_getfile(fdp, fd)) == NULL)
|
|
return (EBADF);
|
|
|
|
if ((fp->f_flag & FWRITE) == 0)
|
|
return (EBADF);
|
|
|
|
FILE_USE(fp);
|
|
|
|
vp = (struct vnode *)fp->f_data;
|
|
if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {
|
|
error = ESPIPE;
|
|
goto out;
|
|
}
|
|
|
|
offset = SCARG(uap, offset);
|
|
|
|
/*
|
|
* XXX This works because no file systems actually
|
|
* XXX take any action on the seek operation.
|
|
*/
|
|
if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0)
|
|
goto out;
|
|
|
|
/* dofilewrite() will unuse the descriptor for us */
|
|
return (dofilewrite(p, fd, fp, SCARG(uap, buf), SCARG(uap, nbyte),
|
|
&offset, 0, retval));
|
|
|
|
out:
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Positional gather write system call.
|
|
*/
|
|
int
|
|
sys_pwritev(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_pwritev_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(const struct iovec *) iovp;
|
|
syscallarg(int) iovcnt;
|
|
syscallarg(off_t) offset;
|
|
} */ *uap = v;
|
|
struct filedesc *fdp = p->p_fd;
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
off_t offset;
|
|
int error, fd = SCARG(uap, fd);
|
|
|
|
if ((fp = fd_getfile(fdp, fd)) == NULL)
|
|
return (EBADF);
|
|
|
|
if ((fp->f_flag & FWRITE) == 0)
|
|
return (EBADF);
|
|
|
|
FILE_USE(fp);
|
|
|
|
vp = (struct vnode *)fp->f_data;
|
|
if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {
|
|
error = ESPIPE;
|
|
goto out;
|
|
}
|
|
|
|
offset = SCARG(uap, offset);
|
|
|
|
/*
|
|
* XXX This works because no file systems actually
|
|
* XXX take any action on the seek operation.
|
|
*/
|
|
if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0)
|
|
goto out;
|
|
|
|
/* dofilewritev() will unuse the descriptor for us */
|
|
return (dofilewritev(p, fd, fp, SCARG(uap, iovp), SCARG(uap, iovcnt),
|
|
&offset, 0, retval));
|
|
|
|
out:
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check access permissions.
|
|
*/
|
|
int
|
|
sys_access(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_access_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) flags;
|
|
} */ *uap = v;
|
|
struct ucred *cred = crget();
|
|
struct vnode *vp;
|
|
int error, flags;
|
|
struct nameidata nd;
|
|
|
|
(void)memcpy(cred, p->p_ucred, sizeof(*cred));
|
|
cred->cr_ref = 1;
|
|
cred->cr_uid = p->p_cred->p_ruid;
|
|
cred->cr_gid = p->p_cred->p_rgid;
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
/* Override default credentials */
|
|
nd.ni_cnd.cn_cred = cred;
|
|
if ((error = namei(&nd)) != 0)
|
|
goto out;
|
|
vp = nd.ni_vp;
|
|
|
|
/* Flags == 0 means only check for existence. */
|
|
if (SCARG(uap, flags)) {
|
|
flags = 0;
|
|
if (SCARG(uap, flags) & R_OK)
|
|
flags |= VREAD;
|
|
if (SCARG(uap, flags) & W_OK)
|
|
flags |= VWRITE;
|
|
if (SCARG(uap, flags) & X_OK)
|
|
flags |= VEXEC;
|
|
|
|
error = VOP_ACCESS(vp, flags, cred, p);
|
|
if (!error && (flags & VWRITE))
|
|
error = vn_writechk(vp);
|
|
}
|
|
vput(vp);
|
|
out:
|
|
crfree(cred);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get file status; this version follows links.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys___stat13(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys___stat13_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(struct stat *) ub;
|
|
} */ *uap = v;
|
|
struct stat sb;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = vn_stat(nd.ni_vp, &sb, p);
|
|
vput(nd.ni_vp);
|
|
if (error)
|
|
return (error);
|
|
error = copyout(&sb, SCARG(uap, ub), sizeof(sb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get file status; this version does not follow links.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys___lstat13(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys___lstat13_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(struct stat *) ub;
|
|
} */ *uap = v;
|
|
struct stat sb;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = vn_stat(nd.ni_vp, &sb, p);
|
|
vput(nd.ni_vp);
|
|
if (error)
|
|
return (error);
|
|
error = copyout(&sb, SCARG(uap, ub), sizeof(sb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get configurable pathname variables.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_pathconf(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_pathconf_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) name;
|
|
} */ *uap = v;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = VOP_PATHCONF(nd.ni_vp, SCARG(uap, name), retval);
|
|
vput(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Return target name of a symbolic link.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_readlink(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_readlink_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(char *) buf;
|
|
syscallarg(size_t) count;
|
|
} */ *uap = v;
|
|
struct vnode *vp;
|
|
struct iovec aiov;
|
|
struct uio auio;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type != VLNK)
|
|
error = EINVAL;
|
|
else if (!(vp->v_mount->mnt_flag & MNT_SYMPERM) ||
|
|
(error = VOP_ACCESS(vp, VREAD, p->p_ucred, p)) == 0) {
|
|
aiov.iov_base = SCARG(uap, buf);
|
|
aiov.iov_len = SCARG(uap, count);
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_offset = 0;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_procp = p;
|
|
auio.uio_resid = SCARG(uap, count);
|
|
error = VOP_READLINK(vp, &auio, p->p_ucred);
|
|
}
|
|
vput(vp);
|
|
*retval = SCARG(uap, count) - auio.uio_resid;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change flags of a file given a path name.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_chflags(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_chflags_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(u_long) flags;
|
|
} */ *uap = v;
|
|
struct vnode *vp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
error = change_flags(vp, SCARG(uap, flags), p);
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change flags of a file given a file descriptor.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_fchflags(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_fchflags_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(u_long) flags;
|
|
} */ *uap = v;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
/* getvnode() will use the descriptor for us */
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
error = change_flags(vp, SCARG(uap, flags), p);
|
|
VOP_UNLOCK(vp, 0);
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change flags of a file given a path name; this version does
|
|
* not follow links.
|
|
*/
|
|
int
|
|
sys_lchflags(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_lchflags_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(u_long) flags;
|
|
} */ *uap = v;
|
|
struct vnode *vp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
error = change_flags(vp, SCARG(uap, flags), p);
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common routine to change flags of a file.
|
|
*/
|
|
int
|
|
change_flags(vp, flags, p)
|
|
struct vnode *vp;
|
|
u_long flags;
|
|
struct proc *p;
|
|
{
|
|
struct vattr vattr;
|
|
int error;
|
|
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
/*
|
|
* Non-superusers cannot change the flags on devices, even if they
|
|
* own them.
|
|
*/
|
|
if (suser(p->p_ucred, &p->p_acflag) != 0) {
|
|
if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0)
|
|
goto out;
|
|
if (vattr.va_type == VCHR || vattr.va_type == VBLK) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_flags = flags;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
out:
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change mode of a file given path name; this version follows links.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_chmod(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_chmod_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap = v;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
|
|
error = change_mode(nd.ni_vp, SCARG(uap, mode), p);
|
|
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change mode of a file given a file descriptor.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_fchmod(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_fchmod_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) mode;
|
|
} */ *uap = v;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
/* getvnode() will use the descriptor for us */
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
|
|
error = change_mode((struct vnode *)fp->f_data, SCARG(uap, mode), p);
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change mode of a file given path name; this version does not follow links.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_lchmod(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_lchmod_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap = v;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
|
|
error = change_mode(nd.ni_vp, SCARG(uap, mode), p);
|
|
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common routine to set mode given a vnode.
|
|
*/
|
|
static int
|
|
change_mode(vp, mode, p)
|
|
struct vnode *vp;
|
|
int mode;
|
|
struct proc *p;
|
|
{
|
|
struct vattr vattr;
|
|
int error;
|
|
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = mode & ALLPERMS;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
VOP_UNLOCK(vp, 0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a path name; this version follows links.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_chown(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_chown_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(uid_t) uid;
|
|
syscallarg(gid_t) gid;
|
|
} */ *uap = v;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
|
|
error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 0);
|
|
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a path name; this version follows links.
|
|
* Provides POSIX semantics.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys___posix_chown(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_chown_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(uid_t) uid;
|
|
syscallarg(gid_t) gid;
|
|
} */ *uap = v;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
|
|
error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 1);
|
|
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a file descriptor.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_fchown(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_fchown_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(uid_t) uid;
|
|
syscallarg(gid_t) gid;
|
|
} */ *uap = v;
|
|
int error;
|
|
struct file *fp;
|
|
|
|
/* getvnode() will use the descriptor for us */
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
|
|
error = change_owner((struct vnode *)fp->f_data, SCARG(uap, uid),
|
|
SCARG(uap, gid), p, 0);
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a file descriptor, providing POSIX/XPG semantics.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys___posix_fchown(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_fchown_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(uid_t) uid;
|
|
syscallarg(gid_t) gid;
|
|
} */ *uap = v;
|
|
int error;
|
|
struct file *fp;
|
|
|
|
/* getvnode() will use the descriptor for us */
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
|
|
error = change_owner((struct vnode *)fp->f_data, SCARG(uap, uid),
|
|
SCARG(uap, gid), p, 1);
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a path name; this version does not follow links.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_lchown(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_lchown_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(uid_t) uid;
|
|
syscallarg(gid_t) gid;
|
|
} */ *uap = v;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
|
|
error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 0);
|
|
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a path name; this version does not follow links.
|
|
* Provides POSIX/XPG semantics.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys___posix_lchown(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_lchown_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(uid_t) uid;
|
|
syscallarg(gid_t) gid;
|
|
} */ *uap = v;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
|
|
error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 1);
|
|
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common routine to set ownership given a vnode.
|
|
*/
|
|
static int
|
|
change_owner(vp, uid, gid, p, posix_semantics)
|
|
struct vnode *vp;
|
|
uid_t uid;
|
|
gid_t gid;
|
|
struct proc *p;
|
|
int posix_semantics;
|
|
{
|
|
struct vattr vattr;
|
|
mode_t newmode;
|
|
int error;
|
|
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0)
|
|
goto out;
|
|
|
|
#define CHANGED(x) ((x) != -1)
|
|
newmode = vattr.va_mode;
|
|
if (posix_semantics) {
|
|
/*
|
|
* POSIX/XPG semantics: if the caller is not the super-user,
|
|
* clear set-user-id and set-group-id bits. Both POSIX and
|
|
* the XPG consider the behaviour for calls by the super-user
|
|
* implementation-defined; we leave the set-user-id and set-
|
|
* group-id settings intact in that case.
|
|
*/
|
|
if (suser(p->p_ucred, NULL) != 0)
|
|
newmode &= ~(S_ISUID | S_ISGID);
|
|
} else {
|
|
/*
|
|
* NetBSD semantics: when changing owner and/or group,
|
|
* clear the respective bit(s).
|
|
*/
|
|
if (CHANGED(uid))
|
|
newmode &= ~S_ISUID;
|
|
if (CHANGED(gid))
|
|
newmode &= ~S_ISGID;
|
|
}
|
|
/* Update va_mode iff altered. */
|
|
if (vattr.va_mode == newmode)
|
|
newmode = VNOVAL;
|
|
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_uid = CHANGED(uid) ? uid : VNOVAL;
|
|
vattr.va_gid = CHANGED(gid) ? gid : VNOVAL;
|
|
vattr.va_mode = newmode;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
#undef CHANGED
|
|
|
|
out:
|
|
VOP_UNLOCK(vp, 0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the access and modification times given a path name; this
|
|
* version follows links.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_utimes(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_utimes_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(const struct timeval *) tptr;
|
|
} */ *uap = v;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
|
|
error = change_utimes(nd.ni_vp, SCARG(uap, tptr), p);
|
|
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the access and modification times given a file descriptor.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_futimes(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_futimes_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(const struct timeval *) tptr;
|
|
} */ *uap = v;
|
|
int error;
|
|
struct file *fp;
|
|
|
|
/* getvnode() will use the descriptor for us */
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
|
|
error = change_utimes((struct vnode *)fp->f_data, SCARG(uap, tptr), p);
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the access and modification times given a path name; this
|
|
* version does not follow links.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_lutimes(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_lutimes_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(const struct timeval *) tptr;
|
|
} */ *uap = v;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
|
|
error = change_utimes(nd.ni_vp, SCARG(uap, tptr), p);
|
|
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common routine to set access and modification times given a vnode.
|
|
*/
|
|
static int
|
|
change_utimes(vp, tptr, p)
|
|
struct vnode *vp;
|
|
const struct timeval *tptr;
|
|
struct proc *p;
|
|
{
|
|
struct timeval tv[2];
|
|
struct vattr vattr;
|
|
int error;
|
|
|
|
VATTR_NULL(&vattr);
|
|
if (tptr == NULL) {
|
|
microtime(&tv[0]);
|
|
tv[1] = tv[0];
|
|
vattr.va_vaflags |= VA_UTIMES_NULL;
|
|
} else {
|
|
error = copyin(tptr, tv, sizeof(tv));
|
|
if (error)
|
|
return (error);
|
|
}
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
vattr.va_atime.tv_sec = tv[0].tv_sec;
|
|
vattr.va_atime.tv_nsec = tv[0].tv_usec * 1000;
|
|
vattr.va_mtime.tv_sec = tv[1].tv_sec;
|
|
vattr.va_mtime.tv_nsec = tv[1].tv_usec * 1000;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
VOP_UNLOCK(vp, 0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Truncate a file given its path name.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_truncate(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_truncate_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) length;
|
|
} */ *uap = v;
|
|
struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
if (vp->v_type == VDIR)
|
|
error = EISDIR;
|
|
else if ((error = vn_writechk(vp)) == 0 &&
|
|
(error = VOP_ACCESS(vp, VWRITE, p->p_ucred, p)) == 0) {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_size = SCARG(uap, length);
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
}
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Truncate a file given a file descriptor.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_ftruncate(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_ftruncate_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) length;
|
|
} */ *uap = v;
|
|
struct vattr vattr;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
/* getvnode() will use the descriptor for us */
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
if ((fp->f_flag & FWRITE) == 0) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
vp = (struct vnode *)fp->f_data;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
if (vp->v_type == VDIR)
|
|
error = EISDIR;
|
|
else if ((error = vn_writechk(vp)) == 0) {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_size = SCARG(uap, length);
|
|
error = VOP_SETATTR(vp, &vattr, fp->f_cred, p);
|
|
}
|
|
VOP_UNLOCK(vp, 0);
|
|
out:
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Sync an open file.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_fsync(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_fsync_args /* {
|
|
syscallarg(int) fd;
|
|
} */ *uap = v;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
/* getvnode() will use the descriptor for us */
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
error = VOP_FSYNC(vp, fp->f_cred, FSYNC_WAIT, 0, 0, p);
|
|
if (error == 0 && bioops.io_fsync != NULL &&
|
|
vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP))
|
|
(*bioops.io_fsync)(vp);
|
|
VOP_UNLOCK(vp, 0);
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Sync the data of an open file.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_fdatasync(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_fdatasync_args /* {
|
|
syscallarg(int) fd;
|
|
} */ *uap = v;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
/* getvnode() will use the descriptor for us */
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
error = VOP_FSYNC(vp, fp->f_cred, FSYNC_WAIT|FSYNC_DATAONLY, 0, 0, p);
|
|
VOP_UNLOCK(vp, 0);
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Rename files, (standard) BSD semantics frontend.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_rename(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_rename_args /* {
|
|
syscallarg(const char *) from;
|
|
syscallarg(const char *) to;
|
|
} */ *uap = v;
|
|
|
|
return (rename_files(SCARG(uap, from), SCARG(uap, to), p, 0));
|
|
}
|
|
|
|
/*
|
|
* Rename files, POSIX semantics frontend.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys___posix_rename(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys___posix_rename_args /* {
|
|
syscallarg(const char *) from;
|
|
syscallarg(const char *) to;
|
|
} */ *uap = v;
|
|
|
|
return (rename_files(SCARG(uap, from), SCARG(uap, to), p, 1));
|
|
}
|
|
|
|
/*
|
|
* Rename files. Source and destination must either both be directories,
|
|
* or both not be directories. If target is a directory, it must be empty.
|
|
* If `from' and `to' refer to the same object, the value of the `retain'
|
|
* argument is used to determine whether `from' will be
|
|
*
|
|
* (retain == 0) deleted unless `from' and `to' refer to the same
|
|
* object in the file system's name space (BSD).
|
|
* (retain == 1) always retained (POSIX).
|
|
*/
|
|
static int
|
|
rename_files(from, to, p, retain)
|
|
const char *from, *to;
|
|
struct proc *p;
|
|
int retain;
|
|
{
|
|
struct vnode *tvp, *fvp, *tdvp;
|
|
struct nameidata fromnd, tond;
|
|
int error;
|
|
|
|
NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE,
|
|
from, p);
|
|
if ((error = namei(&fromnd)) != 0)
|
|
return (error);
|
|
fvp = fromnd.ni_vp;
|
|
NDINIT(&tond, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART,
|
|
UIO_USERSPACE, to, p);
|
|
if ((error = namei(&tond)) != 0) {
|
|
VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
|
|
vrele(fromnd.ni_dvp);
|
|
vrele(fvp);
|
|
goto out1;
|
|
}
|
|
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;
|
|
|
|
/*
|
|
* Source and destination refer to the same object.
|
|
*/
|
|
if (fvp == tvp) {
|
|
if (retain)
|
|
error = -1;
|
|
else if (fromnd.ni_dvp == tdvp &&
|
|
fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen &&
|
|
!memcmp(fromnd.ni_cnd.cn_nameptr,
|
|
tond.ni_cnd.cn_nameptr,
|
|
fromnd.ni_cnd.cn_namelen))
|
|
error = -1;
|
|
}
|
|
|
|
out:
|
|
if (!error) {
|
|
VOP_LEASE(tdvp, p, p->p_ucred, LEASE_WRITE);
|
|
if (fromnd.ni_dvp != tdvp)
|
|
VOP_LEASE(fromnd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
if (tvp) {
|
|
VOP_LEASE(tvp, p, p->p_ucred, LEASE_WRITE);
|
|
}
|
|
error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd,
|
|
tond.ni_dvp, tond.ni_vp, &tond.ni_cnd);
|
|
} else {
|
|
VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd);
|
|
if (tdvp == tvp)
|
|
vrele(tdvp);
|
|
else
|
|
vput(tdvp);
|
|
if (tvp)
|
|
vput(tvp);
|
|
VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
|
|
vrele(fromnd.ni_dvp);
|
|
vrele(fvp);
|
|
}
|
|
vrele(tond.ni_startdir);
|
|
PNBUF_PUT(tond.ni_cnd.cn_pnbuf);
|
|
out1:
|
|
if (fromnd.ni_startdir)
|
|
vrele(fromnd.ni_startdir);
|
|
PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf);
|
|
return (error == -1 ? 0 : error);
|
|
}
|
|
|
|
/*
|
|
* Make a directory file.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_mkdir(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_mkdir_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap = v;
|
|
struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp != NULL) {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(vp);
|
|
return (EEXIST);
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_type = VDIR;
|
|
vattr.va_mode =
|
|
(SCARG(uap, mode) & ACCESSPERMS) &~ p->p_cwdi->cwdi_cmask;
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
|
|
if (!error)
|
|
vput(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Remove a directory file.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_rmdir(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_rmdir_args /* {
|
|
syscallarg(const char *) path;
|
|
} */ *uap = v;
|
|
struct vnode *vp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
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_flag & VROOT)
|
|
error = EBUSY;
|
|
out:
|
|
if (!error) {
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
|
|
} else {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vput(vp);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Read a block of directory entries in a file system independent format.
|
|
*/
|
|
int
|
|
sys_getdents(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_getdents_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(char *) buf;
|
|
syscallarg(size_t) count;
|
|
} */ *uap = v;
|
|
struct file *fp;
|
|
int error, done;
|
|
|
|
/* getvnode() will use the descriptor for us */
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
if ((fp->f_flag & FREAD) == 0) {
|
|
error = EBADF;
|
|
goto out;
|
|
}
|
|
error = vn_readdir(fp, SCARG(uap, buf), UIO_USERSPACE,
|
|
SCARG(uap, count), &done, p, 0, 0);
|
|
*retval = done;
|
|
out:
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the mode mask for creation of filesystem nodes.
|
|
*/
|
|
int
|
|
sys_umask(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_umask_args /* {
|
|
syscallarg(mode_t) newmask;
|
|
} */ *uap = v;
|
|
struct cwdinfo *cwdi;
|
|
|
|
cwdi = p->p_cwdi;
|
|
*retval = cwdi->cwdi_cmask;
|
|
cwdi->cwdi_cmask = SCARG(uap, newmask) & ALLPERMS;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Void all references to file by ripping underlying filesystem
|
|
* away from vnode.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_revoke(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_revoke_args /* {
|
|
syscallarg(const char *) path;
|
|
} */ *uap = v;
|
|
struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0)
|
|
goto out;
|
|
if (p->p_ucred->cr_uid != vattr.va_uid &&
|
|
(error = suser(p->p_ucred, &p->p_acflag)) != 0)
|
|
goto out;
|
|
if (vp->v_usecount > 1 || (vp->v_flag & (VALIASED | VLAYER)))
|
|
VOP_REVOKE(vp, REVOKEALL);
|
|
out:
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Convert a user file descriptor to a kernel file entry.
|
|
*/
|
|
int
|
|
getvnode(fdp, fd, fpp)
|
|
struct filedesc *fdp;
|
|
int fd;
|
|
struct file **fpp;
|
|
{
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
|
|
if ((fp = fd_getfile(fdp, fd)) == NULL)
|
|
return (EBADF);
|
|
|
|
FILE_USE(fp);
|
|
|
|
if (fp->f_type != DTYPE_VNODE) {
|
|
FILE_UNUSE(fp, NULL);
|
|
return (EINVAL);
|
|
}
|
|
|
|
vp = (struct vnode *)fp->f_data;
|
|
if (vp->v_type == VBAD) {
|
|
FILE_UNUSE(fp, NULL);
|
|
return (EBADF);
|
|
}
|
|
|
|
*fpp = fp;
|
|
return (0);
|
|
}
|