24aca74f2d
uio now that we don't use uiomove() anymore. o Enforce stricter checks on the length of the iov's in nmount(2) since we now malloc() them individually and corrupted iov's could make the kernel crash in malloc() with "kmem_map too small". Reviewed by: phk
4855 lines
106 KiB
C
4855 lines
106 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.
|
|
* 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 8.13 (Berkeley) 4/15/94
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/* For 4.3 integer FS ID compatibility */
|
|
#include "opt_compat.h"
|
|
#include "opt_ffs.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/bio.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/sysent.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/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/sysctl.h>
|
|
|
|
#include <machine/limits.h>
|
|
#include <machine/stdarg.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_object.h>
|
|
#include <vm/vm_page.h>
|
|
#include <vm/uma.h>
|
|
|
|
static int change_dir(struct nameidata *ndp, struct thread *td);
|
|
static void checkdirs(struct vnode *olddp, struct vnode *newdp);
|
|
static int chroot_refuse_vdir_fds(struct filedesc *fdp);
|
|
static int getutimes(const struct timeval *, 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);
|
|
static int vn_access(struct vnode *vp, int user_flags, struct ucred *cred,
|
|
struct thread *td);
|
|
static int vfs_nmount(struct thread *td, int, struct uio *);
|
|
|
|
static int usermount = 0; /* if 1, non-root can mount fs. */
|
|
|
|
int (*union_dircheckp)(struct thread *td, struct vnode **, struct file *);
|
|
|
|
SYSCTL_INT(_vfs, OID_AUTO, usermount, CTLFLAG_RW, &usermount, 0, "");
|
|
|
|
/*
|
|
* Virtual File System System Calls
|
|
*/
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct nmount_args {
|
|
struct iovec *iovp;
|
|
unsigned int iovcnt;
|
|
int flags;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
nmount(td, uap)
|
|
struct thread *td;
|
|
struct nmount_args /* {
|
|
syscallarg(struct iovec *) iovp;
|
|
syscallarg(unsigned int) iovcnt;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
{
|
|
struct uio auio;
|
|
struct iovec *iov, *needfree;
|
|
struct iovec aiov[UIO_SMALLIOV];
|
|
unsigned int i;
|
|
int error;
|
|
u_int iovlen, iovcnt;
|
|
|
|
iovcnt = SCARG(uap, iovcnt);
|
|
iovlen = iovcnt * sizeof (struct iovec);
|
|
/*
|
|
* Check that we have an even number of iovec's
|
|
* and that we have at least two options.
|
|
*/
|
|
if ((iovcnt & 1) || (iovcnt < 4) || (iovcnt > UIO_MAXIOV))
|
|
return (EINVAL);
|
|
|
|
if (iovcnt > UIO_SMALLIOV) {
|
|
MALLOC(iov, struct iovec *, iovlen, M_IOV, M_WAITOK);
|
|
needfree = iov;
|
|
} else {
|
|
iov = aiov;
|
|
needfree = NULL;
|
|
}
|
|
auio.uio_iov = iov;
|
|
auio.uio_iovcnt = iovcnt;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
if ((error = copyin((caddr_t)uap->iovp, (caddr_t)iov, iovlen)))
|
|
goto finish;
|
|
|
|
for (i = 0; i < iovcnt; i++) {
|
|
if (iov->iov_len > MMAXOPTIONLEN) {
|
|
error = EINVAL;
|
|
goto finish;
|
|
}
|
|
iov++;
|
|
}
|
|
error = vfs_nmount(td, SCARG(uap, flags), &auio);
|
|
finish:
|
|
if (needfree != NULL)
|
|
free(needfree, M_TEMP);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Release all resources related to the
|
|
* mount options.
|
|
*/
|
|
void
|
|
vfs_freeopts(struct vfsoptlist *opts)
|
|
{
|
|
struct vfsopt *opt;
|
|
|
|
while (!TAILQ_EMPTY(opts)) {
|
|
opt = TAILQ_FIRST(opts);
|
|
TAILQ_REMOVE(opts, opt, link);
|
|
free(opt->name, M_MOUNT);
|
|
free(opt->value, M_MOUNT);
|
|
free(opt, M_MOUNT);
|
|
}
|
|
free(opts, M_MOUNT);
|
|
}
|
|
|
|
int
|
|
kernel_mount(iovp, iovcnt, flags)
|
|
struct iovec *iovp;
|
|
unsigned int iovcnt;
|
|
int flags;
|
|
{
|
|
struct uio auio;
|
|
int error;
|
|
|
|
/*
|
|
* Check that we have an even number of iovec's
|
|
* and that we have at least two options.
|
|
*/
|
|
if ((iovcnt & 1) || (iovcnt < 4))
|
|
return (EINVAL);
|
|
|
|
auio.uio_iov = iovp;
|
|
auio.uio_iovcnt = iovcnt;
|
|
auio.uio_segflg = UIO_SYSSPACE;
|
|
|
|
error = vfs_nmount(curthread, flags, &auio);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kernel_vmount(int flags, ...)
|
|
{
|
|
struct iovec *iovp;
|
|
struct uio auio;
|
|
va_list ap;
|
|
unsigned int iovcnt, iovlen, len;
|
|
const char *cp;
|
|
char *buf, *pos;
|
|
size_t n;
|
|
int error, i;
|
|
|
|
len = 0;
|
|
va_start(ap, flags);
|
|
for (iovcnt = 0; (cp = va_arg(ap, const char *)) != NULL; iovcnt++)
|
|
len += strlen(cp) + 1;
|
|
va_end(ap);
|
|
|
|
if (iovcnt < 4 || iovcnt & 1)
|
|
return (EINVAL);
|
|
|
|
iovlen = iovcnt * sizeof (struct iovec);
|
|
MALLOC(iovp, struct iovec *, iovlen, M_MOUNT, M_WAITOK);
|
|
MALLOC(buf, char *, len, M_MOUNT, M_WAITOK);
|
|
pos = buf;
|
|
va_start(ap, flags);
|
|
for (i = 0; i < iovcnt; i++) {
|
|
cp = va_arg(ap, const char *);
|
|
copystr(cp, pos, len - (pos - buf), &n);
|
|
iovp[i].iov_base = pos;
|
|
iovp[i].iov_len = n;
|
|
pos += n;
|
|
}
|
|
va_end(ap);
|
|
|
|
auio.uio_iov = iovp;
|
|
auio.uio_iovcnt = iovcnt;
|
|
auio.uio_segflg = UIO_SYSSPACE;
|
|
|
|
error = vfs_nmount(curthread, flags, &auio);
|
|
FREE(iovp, M_MOUNT);
|
|
FREE(buf, M_MOUNT);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* vfs_nmount(): actually attempt a filesystem mount.
|
|
*/
|
|
static int
|
|
vfs_nmount(td, fsflags, fsoptions)
|
|
struct thread *td;
|
|
int fsflags; /* Flags common to all filesystems. */
|
|
struct uio *fsoptions; /* Options local to the filesystem. */
|
|
{
|
|
linker_file_t lf;
|
|
struct vnode *vp;
|
|
struct mount *mp;
|
|
struct vfsconf *vfsp;
|
|
struct vfsoptlist *optlist;
|
|
char *fstype, *fspath;
|
|
int error, flag = 0, kern_flag = 0;
|
|
int fstypelen, fspathlen;
|
|
struct vattr va;
|
|
struct nameidata nd;
|
|
|
|
error = vfs_buildopts(fsoptions, &optlist);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* We need these two options before the others,
|
|
* and they are mandatory for any filesystem.
|
|
* Ensure they are NUL terminated as well.
|
|
*/
|
|
fstypelen = 0;
|
|
error = vfs_getopt(optlist, "fstype", (void **)&fstype, &fstypelen);
|
|
if (error || fstype[fstypelen - 1] != '\0') {
|
|
error = EINVAL;
|
|
goto bad;
|
|
}
|
|
fspathlen = 0;
|
|
error = vfs_getopt(optlist, "fspath", (void **)&fspath, &fspathlen);
|
|
if (error || fspath[fspathlen - 1] != '\0') {
|
|
error = EINVAL;
|
|
goto bad;
|
|
}
|
|
|
|
/*
|
|
* Be ultra-paranoid about making sure the type and fspath
|
|
* variables will fit in our mp buffers, including the
|
|
* terminating NUL.
|
|
*/
|
|
if (fstypelen >= MFSNAMELEN - 1 || fspathlen >= MNAMELEN - 1) {
|
|
error = ENAMETOOLONG;
|
|
goto bad;
|
|
}
|
|
|
|
if (usermount == 0) {
|
|
error = suser(td);
|
|
if (error)
|
|
goto bad;
|
|
}
|
|
/*
|
|
* Do not allow NFS export by non-root users.
|
|
*/
|
|
if (fsflags & MNT_EXPORTED) {
|
|
error = suser(td);
|
|
if (error)
|
|
goto bad;
|
|
}
|
|
/*
|
|
* Silently enforce MNT_NOSUID and MNT_NODEV for non-root users.
|
|
*/
|
|
if (suser(td))
|
|
fsflags |= MNT_NOSUID | MNT_NODEV;
|
|
/*
|
|
* Get vnode to be covered
|
|
*/
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspath, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
goto bad;
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vp = nd.ni_vp;
|
|
if (fsflags & MNT_UPDATE) {
|
|
if ((vp->v_flag & VROOT) == 0) {
|
|
vput(vp);
|
|
error = EINVAL;
|
|
goto bad;
|
|
}
|
|
mp = vp->v_mount;
|
|
flag = mp->mnt_flag;
|
|
kern_flag = mp->mnt_kern_flag;
|
|
/*
|
|
* We only allow the filesystem to be reloaded if it
|
|
* is currently mounted read-only.
|
|
*/
|
|
if ((fsflags & MNT_RELOAD) &&
|
|
((mp->mnt_flag & MNT_RDONLY) == 0)) {
|
|
vput(vp);
|
|
error = EOPNOTSUPP; /* Needs translation */
|
|
goto bad;
|
|
}
|
|
/*
|
|
* Only root, or the user that did the original mount is
|
|
* permitted to update it.
|
|
*/
|
|
if (mp->mnt_stat.f_owner != td->td_ucred->cr_uid) {
|
|
error = suser(td);
|
|
if (error) {
|
|
vput(vp);
|
|
goto bad;
|
|
}
|
|
}
|
|
if (vfs_busy(mp, LK_NOWAIT, 0, td)) {
|
|
vput(vp);
|
|
error = EBUSY;
|
|
goto bad;
|
|
}
|
|
mtx_lock(&vp->v_interlock);
|
|
if ((vp->v_flag & VMOUNT) != 0 || vp->v_mountedhere != NULL) {
|
|
mtx_unlock(&vp->v_interlock);
|
|
vfs_unbusy(mp, td);
|
|
vput(vp);
|
|
error = EBUSY;
|
|
goto bad;
|
|
}
|
|
vp->v_flag |= VMOUNT;
|
|
mtx_unlock(&vp->v_interlock);
|
|
mp->mnt_flag |= fsflags &
|
|
(MNT_RELOAD | MNT_FORCE | MNT_UPDATE | MNT_SNAPSHOT);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
goto update;
|
|
}
|
|
/*
|
|
* If the user is not root, ensure that they own the directory
|
|
* onto which we are attempting to mount.
|
|
*/
|
|
error = VOP_GETATTR(vp, &va, td->td_ucred, td);
|
|
if (error) {
|
|
vput(vp);
|
|
goto bad;
|
|
}
|
|
if (va.va_uid != td->td_ucred->cr_uid) {
|
|
error = suser(td);
|
|
if (error) {
|
|
vput(vp);
|
|
goto bad;
|
|
}
|
|
}
|
|
if ((error = vinvalbuf(vp, V_SAVE, td->td_ucred, td, 0, 0)) != 0) {
|
|
vput(vp);
|
|
goto bad;
|
|
}
|
|
if (vp->v_type != VDIR) {
|
|
vput(vp);
|
|
error = ENOTDIR;
|
|
goto bad;
|
|
}
|
|
for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
|
|
if (!strcmp(vfsp->vfc_name, fstype))
|
|
break;
|
|
if (vfsp == NULL) {
|
|
/* Only load modules for root (very important!). */
|
|
error = suser(td);
|
|
if (error) {
|
|
vput(vp);
|
|
goto bad;
|
|
}
|
|
error = securelevel_gt(td->td_ucred, 0);
|
|
if (error) {
|
|
vput(vp);
|
|
goto bad;
|
|
}
|
|
error = linker_load_file(fstype, &lf);
|
|
if (error || lf == NULL) {
|
|
vput(vp);
|
|
if (lf == NULL)
|
|
error = ENODEV;
|
|
goto bad;
|
|
}
|
|
lf->userrefs++;
|
|
/* Look up again to see if the VFS was loaded. */
|
|
for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
|
|
if (!strcmp(vfsp->vfc_name, fstype))
|
|
break;
|
|
if (vfsp == NULL) {
|
|
lf->userrefs--;
|
|
linker_file_unload(lf);
|
|
vput(vp);
|
|
error = ENODEV;
|
|
goto bad;
|
|
}
|
|
}
|
|
mtx_lock(&vp->v_interlock);
|
|
if ((vp->v_flag & VMOUNT) != 0 ||
|
|
vp->v_mountedhere != NULL) {
|
|
mtx_unlock(&vp->v_interlock);
|
|
vput(vp);
|
|
error = EBUSY;
|
|
goto bad;
|
|
}
|
|
vp->v_flag |= VMOUNT;
|
|
mtx_unlock(&vp->v_interlock);
|
|
|
|
/*
|
|
* Allocate and initialize the filesystem.
|
|
*/
|
|
mp = malloc(sizeof(struct mount), M_MOUNT, M_WAITOK | M_ZERO);
|
|
TAILQ_INIT(&mp->mnt_nvnodelist);
|
|
TAILQ_INIT(&mp->mnt_reservedvnlist);
|
|
lockinit(&mp->mnt_lock, PVFS, "vfslock", 0, LK_NOPAUSE);
|
|
(void)vfs_busy(mp, LK_NOWAIT, 0, td);
|
|
mp->mnt_op = vfsp->vfc_vfsops;
|
|
mp->mnt_vfc = vfsp;
|
|
vfsp->vfc_refcount++;
|
|
mp->mnt_stat.f_type = vfsp->vfc_typenum;
|
|
mp->mnt_flag |= vfsp->vfc_flags & MNT_VISFLAGMASK;
|
|
strncpy(mp->mnt_stat.f_fstypename, fstype, MFSNAMELEN);
|
|
mp->mnt_vnodecovered = vp;
|
|
mp->mnt_stat.f_owner = td->td_ucred->cr_uid;
|
|
strncpy(mp->mnt_stat.f_mntonname, fspath, MNAMELEN);
|
|
mp->mnt_iosize_max = DFLTPHYS;
|
|
VOP_UNLOCK(vp, 0, td);
|
|
|
|
update:
|
|
mp->mnt_optnew = optlist;
|
|
/*
|
|
* Check if the fs implements the new VFS_NMOUNT()
|
|
* function, since the new system call was used.
|
|
*/
|
|
if (mp->mnt_op->vfs_mount != NULL) {
|
|
printf("%s doesn't support the new mount syscall\n",
|
|
mp->mnt_vfc->vfc_name);
|
|
mtx_lock(&vp->v_interlock);
|
|
vp->v_flag &= ~VMOUNT;
|
|
mtx_unlock(&vp->v_interlock);
|
|
if (mp->mnt_flag & MNT_UPDATE)
|
|
vfs_unbusy(mp, td);
|
|
else {
|
|
mp->mnt_vfc->vfc_refcount--;
|
|
vfs_unbusy(mp, td);
|
|
free((caddr_t)mp, M_MOUNT);
|
|
}
|
|
vrele(vp);
|
|
error = EOPNOTSUPP;
|
|
goto bad;
|
|
}
|
|
|
|
/*
|
|
* Set the mount level flags.
|
|
*/
|
|
if (fsflags & MNT_RDONLY)
|
|
mp->mnt_flag |= MNT_RDONLY;
|
|
else if (mp->mnt_flag & MNT_RDONLY)
|
|
mp->mnt_kern_flag |= MNTK_WANTRDWR;
|
|
mp->mnt_flag &=~ MNT_UPDATEMASK;
|
|
mp->mnt_flag |= fsflags & (MNT_UPDATEMASK | MNT_FORCE);
|
|
/*
|
|
* Mount the filesystem.
|
|
* XXX The final recipients of VFS_MOUNT just overwrite the ndp they
|
|
* get. No freeing of cn_pnbuf.
|
|
*/
|
|
error = VFS_NMOUNT(mp, &nd, td);
|
|
if (!error) {
|
|
if (mp->mnt_opt != NULL)
|
|
vfs_freeopts(mp->mnt_opt);
|
|
mp->mnt_opt = mp->mnt_optnew;
|
|
}
|
|
/*
|
|
* Prevent external consumers of mount
|
|
* options to read mnt_optnew.
|
|
*/
|
|
mp->mnt_optnew = NULL;
|
|
if (mp->mnt_flag & MNT_UPDATE) {
|
|
if (mp->mnt_kern_flag & MNTK_WANTRDWR)
|
|
mp->mnt_flag &= ~MNT_RDONLY;
|
|
mp->mnt_flag &=~
|
|
(MNT_UPDATE | MNT_RELOAD | MNT_FORCE | MNT_SNAPSHOT);
|
|
mp->mnt_kern_flag &=~ MNTK_WANTRDWR;
|
|
if (error) {
|
|
mp->mnt_flag = flag;
|
|
mp->mnt_kern_flag = kern_flag;
|
|
}
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0) {
|
|
if (mp->mnt_syncer == NULL)
|
|
error = vfs_allocate_syncvnode(mp);
|
|
} else {
|
|
if (mp->mnt_syncer != NULL)
|
|
vrele(mp->mnt_syncer);
|
|
mp->mnt_syncer = NULL;
|
|
}
|
|
vfs_unbusy(mp, td);
|
|
mtx_lock(&vp->v_interlock);
|
|
vp->v_flag &= ~VMOUNT;
|
|
mtx_unlock(&vp->v_interlock);
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
/*
|
|
* Put the new filesystem on the mount list after root.
|
|
*/
|
|
cache_purge(vp);
|
|
if (!error) {
|
|
struct vnode *newdp;
|
|
|
|
mtx_lock(&vp->v_interlock);
|
|
vp->v_flag &= ~VMOUNT;
|
|
vp->v_mountedhere = mp;
|
|
mtx_unlock(&vp->v_interlock);
|
|
mtx_lock(&mountlist_mtx);
|
|
TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list);
|
|
mtx_unlock(&mountlist_mtx);
|
|
if (VFS_ROOT(mp, &newdp))
|
|
panic("mount: lost mount");
|
|
checkdirs(vp, newdp);
|
|
vput(newdp);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0)
|
|
error = vfs_allocate_syncvnode(mp);
|
|
vfs_unbusy(mp, td);
|
|
if ((error = VFS_START(mp, 0, td)) != 0) {
|
|
vrele(vp);
|
|
goto bad;
|
|
}
|
|
} else {
|
|
mtx_lock(&vp->v_interlock);
|
|
vp->v_flag &= ~VMOUNT;
|
|
mtx_unlock(&vp->v_interlock);
|
|
mp->mnt_vfc->vfc_refcount--;
|
|
vfs_unbusy(mp, td);
|
|
free((caddr_t)mp, M_MOUNT);
|
|
vput(vp);
|
|
goto bad;
|
|
}
|
|
return (0);
|
|
bad:
|
|
vfs_freeopts(optlist);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Old Mount API.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mount_args {
|
|
char *type;
|
|
char *path;
|
|
int flags;
|
|
caddr_t data;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
mount(td, uap)
|
|
struct thread *td;
|
|
struct mount_args /* {
|
|
syscallarg(char *) type;
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
syscallarg(caddr_t) data;
|
|
} */ *uap;
|
|
{
|
|
char *fstype;
|
|
char *fspath;
|
|
int error;
|
|
|
|
fstype = malloc(MFSNAMELEN, M_TEMP, M_WAITOK);
|
|
fspath = malloc(MNAMELEN, M_TEMP, M_WAITOK);
|
|
|
|
/*
|
|
* vfs_mount() actually takes a kernel string for `type' and
|
|
* `path' now, so extract them.
|
|
*/
|
|
error = copyinstr(SCARG(uap, type), fstype, MFSNAMELEN, NULL);
|
|
if (error)
|
|
goto finish;
|
|
error = copyinstr(SCARG(uap, path), fspath, MNAMELEN, NULL);
|
|
if (error)
|
|
goto finish;
|
|
error = vfs_mount(td, fstype, fspath, SCARG(uap, flags),
|
|
SCARG(uap, data));
|
|
finish:
|
|
free(fstype, M_TEMP);
|
|
free(fspath, M_TEMP);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* vfs_mount(): actually attempt a filesystem mount.
|
|
*
|
|
* This routine is designed to be a "generic" entry point for routines
|
|
* that wish to mount a filesystem. All parameters except `fsdata' are
|
|
* pointers into kernel space. `fsdata' is currently still a pointer
|
|
* into userspace.
|
|
*/
|
|
int
|
|
vfs_mount(td, fstype, fspath, fsflags, fsdata)
|
|
struct thread *td;
|
|
const char *fstype;
|
|
char *fspath;
|
|
int fsflags;
|
|
void *fsdata;
|
|
{
|
|
linker_file_t lf;
|
|
struct vnode *vp;
|
|
struct mount *mp;
|
|
struct vfsconf *vfsp;
|
|
int error, flag = 0, kern_flag = 0;
|
|
struct vattr va;
|
|
struct nameidata nd;
|
|
|
|
/*
|
|
* Be ultra-paranoid about making sure the type and fspath
|
|
* variables will fit in our mp buffers, including the
|
|
* terminating NUL.
|
|
*/
|
|
if (strlen(fstype) >= MFSNAMELEN || strlen(fspath) >= MNAMELEN)
|
|
return (ENAMETOOLONG);
|
|
|
|
if (usermount == 0) {
|
|
error = suser(td);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
/*
|
|
* Do not allow NFS export by non-root users.
|
|
*/
|
|
if (fsflags & MNT_EXPORTED) {
|
|
error = suser(td);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
/*
|
|
* Silently enforce MNT_NOSUID and MNT_NODEV for non-root users.
|
|
*/
|
|
if (suser(td))
|
|
fsflags |= MNT_NOSUID | MNT_NODEV;
|
|
/*
|
|
* Get vnode to be covered
|
|
*/
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspath, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vp = nd.ni_vp;
|
|
if (fsflags & MNT_UPDATE) {
|
|
if ((vp->v_flag & VROOT) == 0) {
|
|
vput(vp);
|
|
return (EINVAL);
|
|
}
|
|
mp = vp->v_mount;
|
|
flag = mp->mnt_flag;
|
|
kern_flag = mp->mnt_kern_flag;
|
|
/*
|
|
* We only allow the filesystem to be reloaded if it
|
|
* is currently mounted read-only.
|
|
*/
|
|
if ((fsflags & MNT_RELOAD) &&
|
|
((mp->mnt_flag & MNT_RDONLY) == 0)) {
|
|
vput(vp);
|
|
return (EOPNOTSUPP); /* Needs translation */
|
|
}
|
|
/*
|
|
* Only root, or the user that did the original mount is
|
|
* permitted to update it.
|
|
*/
|
|
if (mp->mnt_stat.f_owner != td->td_ucred->cr_uid) {
|
|
error = suser(td);
|
|
if (error) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
}
|
|
if (vfs_busy(mp, LK_NOWAIT, 0, td)) {
|
|
vput(vp);
|
|
return (EBUSY);
|
|
}
|
|
mtx_lock(&vp->v_interlock);
|
|
if ((vp->v_flag & VMOUNT) != 0 || vp->v_mountedhere != NULL) {
|
|
mtx_unlock(&vp->v_interlock);
|
|
vfs_unbusy(mp, td);
|
|
vput(vp);
|
|
return (EBUSY);
|
|
}
|
|
vp->v_flag |= VMOUNT;
|
|
mtx_unlock(&vp->v_interlock);
|
|
mp->mnt_flag |= fsflags &
|
|
(MNT_RELOAD | MNT_FORCE | MNT_UPDATE | MNT_SNAPSHOT);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
goto update;
|
|
}
|
|
/*
|
|
* If the user is not root, ensure that they own the directory
|
|
* onto which we are attempting to mount.
|
|
*/
|
|
error = VOP_GETATTR(vp, &va, td->td_ucred, td);
|
|
if (error) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
if (va.va_uid != td->td_ucred->cr_uid) {
|
|
error = suser(td);
|
|
if (error) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
}
|
|
if ((error = vinvalbuf(vp, V_SAVE, td->td_ucred, td, 0, 0)) != 0) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
if (vp->v_type != VDIR) {
|
|
vput(vp);
|
|
return (ENOTDIR);
|
|
}
|
|
for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
|
|
if (!strcmp(vfsp->vfc_name, fstype))
|
|
break;
|
|
if (vfsp == NULL) {
|
|
/* Only load modules for root (very important!). */
|
|
error = suser(td);
|
|
if (error) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
error = securelevel_gt(td->td_ucred, 0);
|
|
if (error) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
error = linker_load_file(fstype, &lf);
|
|
if (error || lf == NULL) {
|
|
vput(vp);
|
|
if (lf == NULL)
|
|
error = ENODEV;
|
|
return (error);
|
|
}
|
|
lf->userrefs++;
|
|
/* Look up again to see if the VFS was loaded. */
|
|
for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
|
|
if (!strcmp(vfsp->vfc_name, fstype))
|
|
break;
|
|
if (vfsp == NULL) {
|
|
lf->userrefs--;
|
|
linker_file_unload(lf);
|
|
vput(vp);
|
|
return (ENODEV);
|
|
}
|
|
}
|
|
mtx_lock(&vp->v_interlock);
|
|
if ((vp->v_flag & VMOUNT) != 0 ||
|
|
vp->v_mountedhere != NULL) {
|
|
mtx_unlock(&vp->v_interlock);
|
|
vput(vp);
|
|
return (EBUSY);
|
|
}
|
|
vp->v_flag |= VMOUNT;
|
|
mtx_unlock(&vp->v_interlock);
|
|
|
|
/*
|
|
* Allocate and initialize the filesystem.
|
|
*/
|
|
mp = malloc(sizeof(struct mount), M_MOUNT, M_WAITOK | M_ZERO);
|
|
TAILQ_INIT(&mp->mnt_nvnodelist);
|
|
TAILQ_INIT(&mp->mnt_reservedvnlist);
|
|
lockinit(&mp->mnt_lock, PVFS, "vfslock", 0, LK_NOPAUSE);
|
|
(void)vfs_busy(mp, LK_NOWAIT, 0, td);
|
|
mp->mnt_op = vfsp->vfc_vfsops;
|
|
mp->mnt_vfc = vfsp;
|
|
vfsp->vfc_refcount++;
|
|
mp->mnt_stat.f_type = vfsp->vfc_typenum;
|
|
mp->mnt_flag |= vfsp->vfc_flags & MNT_VISFLAGMASK;
|
|
strncpy(mp->mnt_stat.f_fstypename, fstype, MFSNAMELEN);
|
|
mp->mnt_vnodecovered = vp;
|
|
mp->mnt_stat.f_owner = td->td_ucred->cr_uid;
|
|
strncpy(mp->mnt_stat.f_mntonname, fspath, MNAMELEN);
|
|
mp->mnt_iosize_max = DFLTPHYS;
|
|
VOP_UNLOCK(vp, 0, td);
|
|
update:
|
|
/*
|
|
* Check if the fs implements the old VFS_MOUNT()
|
|
* function, since the old system call was used.
|
|
*/
|
|
if (mp->mnt_op->vfs_mount == NULL) {
|
|
printf("%s doesn't support the old mount syscall\n",
|
|
mp->mnt_vfc->vfc_name);
|
|
mtx_lock(&vp->v_interlock);
|
|
vp->v_flag &= ~VMOUNT;
|
|
mtx_unlock(&vp->v_interlock);
|
|
if (mp->mnt_flag & MNT_UPDATE)
|
|
vfs_unbusy(mp, td);
|
|
else {
|
|
mp->mnt_vfc->vfc_refcount--;
|
|
vfs_unbusy(mp, td);
|
|
free((caddr_t)mp, M_MOUNT);
|
|
}
|
|
vrele(vp);
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
/*
|
|
* Set the mount level flags.
|
|
*/
|
|
if (fsflags & MNT_RDONLY)
|
|
mp->mnt_flag |= MNT_RDONLY;
|
|
else if (mp->mnt_flag & MNT_RDONLY)
|
|
mp->mnt_kern_flag |= MNTK_WANTRDWR;
|
|
mp->mnt_flag &=~ MNT_UPDATEMASK;
|
|
mp->mnt_flag |= fsflags & (MNT_UPDATEMASK | MNT_FORCE);
|
|
/*
|
|
* Mount the filesystem.
|
|
* XXX The final recipients of VFS_MOUNT just overwrite the ndp they
|
|
* get. No freeing of cn_pnbuf.
|
|
*/
|
|
error = VFS_MOUNT(mp, fspath, fsdata, &nd, td);
|
|
if (mp->mnt_flag & MNT_UPDATE) {
|
|
if (mp->mnt_kern_flag & MNTK_WANTRDWR)
|
|
mp->mnt_flag &= ~MNT_RDONLY;
|
|
mp->mnt_flag &=~
|
|
(MNT_UPDATE | MNT_RELOAD | MNT_FORCE | MNT_SNAPSHOT);
|
|
mp->mnt_kern_flag &=~ MNTK_WANTRDWR;
|
|
if (error) {
|
|
mp->mnt_flag = flag;
|
|
mp->mnt_kern_flag = kern_flag;
|
|
}
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0) {
|
|
if (mp->mnt_syncer == NULL)
|
|
error = vfs_allocate_syncvnode(mp);
|
|
} else {
|
|
if (mp->mnt_syncer != NULL)
|
|
vrele(mp->mnt_syncer);
|
|
mp->mnt_syncer = NULL;
|
|
}
|
|
vfs_unbusy(mp, td);
|
|
mtx_lock(&vp->v_interlock);
|
|
vp->v_flag &= ~VMOUNT;
|
|
mtx_unlock(&vp->v_interlock);
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
/*
|
|
* Put the new filesystem on the mount list after root.
|
|
*/
|
|
cache_purge(vp);
|
|
if (!error) {
|
|
struct vnode *newdp;
|
|
|
|
mtx_lock(&vp->v_interlock);
|
|
vp->v_flag &= ~VMOUNT;
|
|
vp->v_mountedhere = mp;
|
|
mtx_unlock(&vp->v_interlock);
|
|
mtx_lock(&mountlist_mtx);
|
|
TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list);
|
|
mtx_unlock(&mountlist_mtx);
|
|
if (VFS_ROOT(mp, &newdp))
|
|
panic("mount: lost mount");
|
|
checkdirs(vp, newdp);
|
|
vput(newdp);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0)
|
|
error = vfs_allocate_syncvnode(mp);
|
|
vfs_unbusy(mp, td);
|
|
if ((error = VFS_START(mp, 0, td)) != 0)
|
|
vrele(vp);
|
|
} else {
|
|
mtx_lock(&vp->v_interlock);
|
|
vp->v_flag &= ~VMOUNT;
|
|
mtx_unlock(&vp->v_interlock);
|
|
mp->mnt_vfc->vfc_refcount--;
|
|
vfs_unbusy(mp, td);
|
|
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 of `olddp'. If so, replace them with the new
|
|
* mount point.
|
|
*/
|
|
static void
|
|
checkdirs(olddp, newdp)
|
|
struct vnode *olddp, *newdp;
|
|
{
|
|
struct filedesc *fdp;
|
|
struct proc *p;
|
|
int nrele;
|
|
|
|
if (olddp->v_usecount == 1)
|
|
return;
|
|
sx_slock(&allproc_lock);
|
|
LIST_FOREACH(p, &allproc, p_list) {
|
|
PROC_LOCK(p);
|
|
fdp = p->p_fd;
|
|
if (fdp == NULL) {
|
|
PROC_UNLOCK(p);
|
|
continue;
|
|
}
|
|
nrele = 0;
|
|
FILEDESC_LOCK(fdp);
|
|
if (fdp->fd_cdir == olddp) {
|
|
VREF(newdp);
|
|
fdp->fd_cdir = newdp;
|
|
nrele++;
|
|
}
|
|
if (fdp->fd_rdir == olddp) {
|
|
VREF(newdp);
|
|
fdp->fd_rdir = newdp;
|
|
nrele++;
|
|
}
|
|
FILEDESC_UNLOCK(fdp);
|
|
PROC_UNLOCK(p);
|
|
while (nrele--)
|
|
vrele(olddp);
|
|
}
|
|
sx_sunlock(&allproc_lock);
|
|
if (rootvnode == olddp) {
|
|
vrele(rootvnode);
|
|
VREF(newdp);
|
|
rootvnode = newdp;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Unmount a filesystem.
|
|
*
|
|
* Note: unmount takes a path to the vnode mounted on as argument,
|
|
* not special file (as before).
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct unmount_args {
|
|
char *path;
|
|
int flags;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
unmount(td, uap)
|
|
struct thread *td;
|
|
register struct unmount_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct mount *mp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
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 != td->td_ucred->cr_uid) {
|
|
error = suser(td);
|
|
if (error) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Don't allow unmounting the root filesystem.
|
|
*/
|
|
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);
|
|
return (dounmount(mp, SCARG(uap, flags), td));
|
|
}
|
|
|
|
/*
|
|
* Do the actual filesystem unmount.
|
|
*/
|
|
int
|
|
dounmount(mp, flags, td)
|
|
struct mount *mp;
|
|
int flags;
|
|
struct thread *td;
|
|
{
|
|
struct vnode *coveredvp, *fsrootvp;
|
|
int error;
|
|
int async_flag;
|
|
|
|
mtx_lock(&mountlist_mtx);
|
|
if (mp->mnt_kern_flag & MNTK_UNMOUNT) {
|
|
mtx_unlock(&mountlist_mtx);
|
|
return (EBUSY);
|
|
}
|
|
mp->mnt_kern_flag |= MNTK_UNMOUNT;
|
|
/* Allow filesystems to detect that a forced unmount is in progress. */
|
|
if (flags & MNT_FORCE)
|
|
mp->mnt_kern_flag |= MNTK_UNMOUNTF;
|
|
error = lockmgr(&mp->mnt_lock, LK_DRAIN | LK_INTERLOCK |
|
|
((flags & MNT_FORCE) ? 0 : LK_NOWAIT), &mountlist_mtx, td);
|
|
if (error) {
|
|
mp->mnt_kern_flag &= ~(MNTK_UNMOUNT | MNTK_UNMOUNTF);
|
|
if (mp->mnt_kern_flag & MNTK_MWAIT)
|
|
wakeup((caddr_t)mp);
|
|
return (error);
|
|
}
|
|
vn_start_write(NULL, &mp, V_WAIT);
|
|
|
|
if (mp->mnt_flag & MNT_EXPUBLIC)
|
|
vfs_setpublicfs(NULL, NULL, NULL);
|
|
|
|
vfs_msync(mp, MNT_WAIT);
|
|
async_flag = 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)
|
|
vrele(mp->mnt_syncer);
|
|
/* Move process cdir/rdir refs on fs root to underlying vnode. */
|
|
if (VFS_ROOT(mp, &fsrootvp) == 0) {
|
|
if (mp->mnt_vnodecovered != NULL)
|
|
checkdirs(fsrootvp, mp->mnt_vnodecovered);
|
|
if (fsrootvp == rootvnode) {
|
|
vrele(rootvnode);
|
|
rootvnode = NULL;
|
|
}
|
|
vput(fsrootvp);
|
|
}
|
|
if (((mp->mnt_flag & MNT_RDONLY) ||
|
|
(error = VFS_SYNC(mp, MNT_WAIT, td->td_ucred, td)) == 0) ||
|
|
(flags & MNT_FORCE)) {
|
|
error = VFS_UNMOUNT(mp, flags, td);
|
|
}
|
|
vn_finished_write(mp);
|
|
if (error) {
|
|
/* Undo cdir/rdir and rootvnode changes made above. */
|
|
if (VFS_ROOT(mp, &fsrootvp) == 0) {
|
|
if (mp->mnt_vnodecovered != NULL)
|
|
checkdirs(mp->mnt_vnodecovered, fsrootvp);
|
|
if (rootvnode == NULL) {
|
|
rootvnode = fsrootvp;
|
|
vref(rootvnode);
|
|
}
|
|
vput(fsrootvp);
|
|
}
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0 && mp->mnt_syncer == NULL)
|
|
(void) vfs_allocate_syncvnode(mp);
|
|
mtx_lock(&mountlist_mtx);
|
|
mp->mnt_kern_flag &= ~(MNTK_UNMOUNT | MNTK_UNMOUNTF);
|
|
mp->mnt_flag |= async_flag;
|
|
lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK,
|
|
&mountlist_mtx, td);
|
|
if (mp->mnt_kern_flag & MNTK_MWAIT)
|
|
wakeup((caddr_t)mp);
|
|
return (error);
|
|
}
|
|
mtx_lock(&mountlist_mtx);
|
|
TAILQ_REMOVE(&mountlist, mp, mnt_list);
|
|
if ((coveredvp = mp->mnt_vnodecovered) != NULL)
|
|
coveredvp->v_mountedhere = NULL;
|
|
mp->mnt_vfc->vfc_refcount--;
|
|
if (!TAILQ_EMPTY(&mp->mnt_nvnodelist))
|
|
panic("unmount: dangling vnode");
|
|
lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK, &mountlist_mtx, td);
|
|
lockdestroy(&mp->mnt_lock);
|
|
if (coveredvp != NULL)
|
|
vrele(coveredvp);
|
|
if (mp->mnt_kern_flag & MNTK_MWAIT)
|
|
wakeup((caddr_t)mp);
|
|
if (mp->mnt_op->vfs_mount == NULL)
|
|
vfs_freeopts(mp->mnt_opt);
|
|
free((caddr_t)mp, M_MOUNT);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* 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 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;
|
|
}
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0 &&
|
|
vn_start_write(NULL, &mp, V_NOWAIT) == 0) {
|
|
asyncflag = mp->mnt_flag & MNT_ASYNC;
|
|
mp->mnt_flag &= ~MNT_ASYNC;
|
|
vfs_msync(mp, MNT_NOWAIT);
|
|
VFS_SYNC(mp, MNT_NOWAIT,
|
|
((td != NULL) ? td->td_ucred : NOCRED), td);
|
|
mp->mnt_flag |= asyncflag;
|
|
vn_finished_write(mp);
|
|
}
|
|
mtx_lock(&mountlist_mtx);
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
vfs_unbusy(mp, td);
|
|
}
|
|
mtx_unlock(&mountlist_mtx);
|
|
#if 0
|
|
/*
|
|
* XXX don't call vfs_bufstats() yet because that routine
|
|
* was not imported in the Lite2 merge.
|
|
*/
|
|
#ifdef DIAGNOSTIC
|
|
if (syncprt)
|
|
vfs_bufstats();
|
|
#endif /* DIAGNOSTIC */
|
|
#endif
|
|
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.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct quotactl_args {
|
|
char *path;
|
|
int cmd;
|
|
int uid;
|
|
caddr_t arg;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
quotactl(td, uap)
|
|
struct thread *td;
|
|
register struct quotactl_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) cmd;
|
|
syscallarg(int) uid;
|
|
syscallarg(caddr_t) arg;
|
|
} */ *uap;
|
|
{
|
|
struct mount *mp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
if (jailed(td->td_ucred) && !prison_quotas)
|
|
return (EPERM);
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = vn_start_write(nd.ni_vp, &mp, V_WAIT | PCATCH);
|
|
vrele(nd.ni_vp);
|
|
if (error)
|
|
return (error);
|
|
error = VFS_QUOTACTL(mp, SCARG(uap, cmd), SCARG(uap, uid),
|
|
SCARG(uap, arg), td);
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct statfs_args {
|
|
char *path;
|
|
struct statfs *buf;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
statfs(td, uap)
|
|
struct thread *td;
|
|
register struct statfs_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct statfs *) buf;
|
|
} */ *uap;
|
|
{
|
|
register struct mount *mp;
|
|
register struct statfs *sp;
|
|
int error;
|
|
struct nameidata nd;
|
|
struct statfs sb;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
mp = nd.ni_vp->v_mount;
|
|
sp = &mp->mnt_stat;
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vrele(nd.ni_vp);
|
|
error = VFS_STATFS(mp, sp, td);
|
|
if (error)
|
|
return (error);
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
if (suser(td)) {
|
|
bcopy((caddr_t)sp, (caddr_t)&sb, sizeof(sb));
|
|
sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;
|
|
sp = &sb;
|
|
}
|
|
return (copyout((caddr_t)sp, (caddr_t)SCARG(uap, buf), sizeof(*sp)));
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fstatfs_args {
|
|
int fd;
|
|
struct statfs *buf;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
fstatfs(td, uap)
|
|
struct thread *td;
|
|
register struct fstatfs_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(struct statfs *) buf;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
struct mount *mp;
|
|
register struct statfs *sp;
|
|
int error;
|
|
struct statfs sb;
|
|
|
|
if ((error = getvnode(td->td_proc->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
mp = ((struct vnode *)fp->f_data)->v_mount;
|
|
fdrop(fp, td);
|
|
if (mp == NULL)
|
|
return (EBADF);
|
|
sp = &mp->mnt_stat;
|
|
error = VFS_STATFS(mp, sp, td);
|
|
if (error)
|
|
return (error);
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
if (suser(td)) {
|
|
bcopy((caddr_t)sp, (caddr_t)&sb, sizeof(sb));
|
|
sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;
|
|
sp = &sb;
|
|
}
|
|
return (copyout((caddr_t)sp, (caddr_t)SCARG(uap, buf), sizeof(*sp)));
|
|
}
|
|
|
|
/*
|
|
* 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 /* {
|
|
syscallarg(struct statfs *) buf;
|
|
syscallarg(long) bufsize;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
{
|
|
register struct mount *mp, *nmp;
|
|
register struct statfs *sp;
|
|
caddr_t sfsp;
|
|
long count, maxcount, error;
|
|
|
|
maxcount = SCARG(uap, bufsize) / sizeof(struct statfs);
|
|
sfsp = (caddr_t)SCARG(uap, buf);
|
|
count = 0;
|
|
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;
|
|
}
|
|
if (sfsp && count < maxcount) {
|
|
sp = &mp->mnt_stat;
|
|
/*
|
|
* If MNT_NOWAIT or MNT_LAZY is specified, do not
|
|
* refresh the fsstat cache. MNT_NOWAIT or MNT_LAZY
|
|
* overrides MNT_WAIT.
|
|
*/
|
|
if (((SCARG(uap, flags) & (MNT_LAZY|MNT_NOWAIT)) == 0 ||
|
|
(SCARG(uap, flags) & MNT_WAIT)) &&
|
|
(error = VFS_STATFS(mp, sp, td))) {
|
|
mtx_lock(&mountlist_mtx);
|
|
nmp = TAILQ_NEXT(mp, mnt_list);
|
|
vfs_unbusy(mp, td);
|
|
continue;
|
|
}
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
error = copyout((caddr_t)sp, sfsp, sizeof(*sp));
|
|
if (error) {
|
|
vfs_unbusy(mp, td);
|
|
return (error);
|
|
}
|
|
sfsp += sizeof(*sp);
|
|
}
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* Change current working directory to a given file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchdir_args {
|
|
int fd;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
fchdir(td, uap)
|
|
struct thread *td;
|
|
struct fchdir_args /* {
|
|
syscallarg(int) fd;
|
|
} */ *uap;
|
|
{
|
|
register struct filedesc *fdp = td->td_proc->p_fd;
|
|
struct vnode *vp, *tdp, *vpold;
|
|
struct mount *mp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
VREF(vp);
|
|
fdrop(fp, td);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
if (vp->v_type != VDIR)
|
|
error = ENOTDIR;
|
|
else
|
|
error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td);
|
|
while (!error && (mp = vp->v_mountedhere) != NULL) {
|
|
if (vfs_busy(mp, 0, 0, td))
|
|
continue;
|
|
error = VFS_ROOT(mp, &tdp);
|
|
vfs_unbusy(mp, td);
|
|
if (error)
|
|
break;
|
|
vput(vp);
|
|
vp = tdp;
|
|
}
|
|
if (error) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
VOP_UNLOCK(vp, 0, td);
|
|
FILEDESC_LOCK(fdp);
|
|
vpold = fdp->fd_cdir;
|
|
fdp->fd_cdir = vp;
|
|
FILEDESC_UNLOCK(fdp);
|
|
vrele(vpold);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Change current working directory (``.'').
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chdir_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
chdir(td, uap)
|
|
struct thread *td;
|
|
struct chdir_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
{
|
|
register struct filedesc *fdp = td->td_proc->p_fd;
|
|
int error;
|
|
struct nameidata nd;
|
|
struct vnode *vp;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), td);
|
|
if ((error = change_dir(&nd, td)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
FILEDESC_LOCK(fdp);
|
|
vp = fdp->fd_cdir;
|
|
fdp->fd_cdir = nd.ni_vp;
|
|
FILEDESC_UNLOCK(fdp);
|
|
vrele(vp);
|
|
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(fdp);
|
|
for (fd = 0; fd < fdp->fd_nfiles ; fd++) {
|
|
fp = fget_locked(fdp, fd);
|
|
if (fp == NULL)
|
|
continue;
|
|
if (fp->f_type == DTYPE_VNODE) {
|
|
vp = (struct vnode *)fp->f_data;
|
|
if (vp->v_type == VDIR) {
|
|
FILEDESC_UNLOCK(fdp);
|
|
return (EPERM);
|
|
}
|
|
}
|
|
}
|
|
FILEDESC_UNLOCK(fdp);
|
|
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
|
|
/* ARGSUSED */
|
|
int
|
|
chroot(td, uap)
|
|
struct thread *td;
|
|
struct chroot_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
{
|
|
register struct filedesc *fdp = td->td_proc->p_fd;
|
|
int error;
|
|
struct nameidata nd;
|
|
struct vnode *vp;
|
|
|
|
error = suser_cred(td->td_ucred, PRISON_ROOT);
|
|
if (error)
|
|
return (error);
|
|
FILEDESC_LOCK(fdp);
|
|
if (chroot_allow_open_directories == 0 ||
|
|
(chroot_allow_open_directories == 1 && fdp->fd_rdir != rootvnode)) {
|
|
FILEDESC_UNLOCK(fdp);
|
|
error = chroot_refuse_vdir_fds(fdp);
|
|
} else
|
|
FILEDESC_UNLOCK(fdp);
|
|
if (error)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), td);
|
|
if ((error = change_dir(&nd, td)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
FILEDESC_LOCK(fdp);
|
|
vp = fdp->fd_rdir;
|
|
fdp->fd_rdir = nd.ni_vp;
|
|
if (!fdp->fd_jdir) {
|
|
fdp->fd_jdir = nd.ni_vp;
|
|
VREF(fdp->fd_jdir);
|
|
}
|
|
FILEDESC_UNLOCK(fdp);
|
|
vrele(vp);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Common routine for chroot and chdir.
|
|
*/
|
|
static int
|
|
change_dir(ndp, td)
|
|
register struct nameidata *ndp;
|
|
struct thread *td;
|
|
{
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
error = namei(ndp);
|
|
if (error)
|
|
return (error);
|
|
vp = ndp->ni_vp;
|
|
if (vp->v_type != VDIR)
|
|
error = ENOTDIR;
|
|
else
|
|
error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td);
|
|
if (error)
|
|
vput(vp);
|
|
else
|
|
VOP_UNLOCK(vp, 0, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check permissions, allocate an open file structure,
|
|
* and call the device open routine if any.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct open_args {
|
|
char *path;
|
|
int flags;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
open(td, uap)
|
|
struct thread *td;
|
|
register struct open_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
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, flags, oflags;
|
|
struct file *nfp;
|
|
int type, indx, error;
|
|
struct flock lf;
|
|
struct nameidata nd;
|
|
|
|
oflags = SCARG(uap, flags);
|
|
if ((oflags & O_ACCMODE) == O_ACCMODE)
|
|
return (EINVAL);
|
|
flags = FFLAGS(oflags);
|
|
error = falloc(td, &nfp, &indx);
|
|
if (error)
|
|
return (error);
|
|
fp = nfp;
|
|
FILEDESC_LOCK(fdp);
|
|
cmode = ((SCARG(uap, mode) &~ fdp->fd_cmask) & ALLPERMS) &~ S_ISTXT;
|
|
FILEDESC_UNLOCK(fdp);
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
|
|
td->td_dupfd = -indx - 1; /* XXX check for fdopen */
|
|
/*
|
|
* Bump the ref count to prevent another process from closing
|
|
* the descriptor while we are blocked in vn_open()
|
|
*/
|
|
fhold(fp);
|
|
error = vn_open(&nd, &flags, cmode);
|
|
if (error) {
|
|
/*
|
|
* 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.
|
|
*/
|
|
FILEDESC_LOCK(fdp);
|
|
if (fdp->fd_ofiles[indx] == fp) {
|
|
fdp->fd_ofiles[indx] = NULL;
|
|
FILEDESC_UNLOCK(fdp);
|
|
fdrop(fp, td);
|
|
} else
|
|
FILEDESC_UNLOCK(fdp);
|
|
|
|
if (error == ERESTART)
|
|
error = EINTR;
|
|
return (error);
|
|
}
|
|
td->td_dupfd = 0;
|
|
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.
|
|
*/
|
|
FILEDESC_LOCK(fdp);
|
|
FILE_LOCK(fp);
|
|
if (fp->f_count == 1) {
|
|
KASSERT(fdp->fd_ofiles[indx] != fp,
|
|
("Open file descriptor lost all refs"));
|
|
FILEDESC_UNLOCK(fdp);
|
|
FILE_UNLOCK(fp);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vn_close(vp, flags & FMASK, fp->f_cred, td);
|
|
fdrop(fp, td);
|
|
td->td_retval[0] = indx;
|
|
return 0;
|
|
}
|
|
|
|
/* assert that vn_open created a backing object if one is needed */
|
|
KASSERT(!vn_canvmio(vp) || VOP_GETVOBJECT(vp, NULL) == 0,
|
|
("open: vmio vnode has no backing object after vn_open"));
|
|
|
|
fp->f_data = (caddr_t)vp;
|
|
fp->f_flag = flags & FMASK;
|
|
fp->f_ops = &vnops;
|
|
fp->f_type = (vp->v_type == VFIFO ? DTYPE_FIFO : DTYPE_VNODE);
|
|
FILEDESC_UNLOCK(fdp);
|
|
FILE_UNLOCK(fp);
|
|
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);
|
|
error = VOP_SETATTR(vp, &vat, td->td_ucred, td);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vn_finished_write(mp);
|
|
if (error)
|
|
goto bad;
|
|
}
|
|
/*
|
|
* Release our private reference, leaving the one associated with
|
|
* the descriptor table intact.
|
|
*/
|
|
fdrop(fp, td);
|
|
td->td_retval[0] = indx;
|
|
return (0);
|
|
bad:
|
|
FILEDESC_LOCK(fdp);
|
|
if (fdp->fd_ofiles[indx] == fp) {
|
|
fdp->fd_ofiles[indx] = NULL;
|
|
FILEDESC_UNLOCK(fdp);
|
|
fdrop(fp, td);
|
|
} else
|
|
FILEDESC_UNLOCK(fdp);
|
|
return (error);
|
|
}
|
|
|
|
#ifdef COMPAT_43
|
|
/*
|
|
* Create a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ocreat_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
ocreat(td, uap)
|
|
struct thread *td;
|
|
register struct ocreat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
struct open_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
syscallarg(int) mode;
|
|
} */ nuap;
|
|
|
|
SCARG(&nuap, path) = SCARG(uap, path);
|
|
SCARG(&nuap, mode) = SCARG(uap, mode);
|
|
SCARG(&nuap, flags) = O_WRONLY | O_CREAT | O_TRUNC;
|
|
return (open(td, &nuap));
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
/*
|
|
* Create a special file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mknod_args {
|
|
char *path;
|
|
int mode;
|
|
int dev;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
mknod(td, uap)
|
|
struct thread *td;
|
|
register struct mknod_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
syscallarg(int) dev;
|
|
} */ *uap;
|
|
{
|
|
struct vnode *vp;
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
int error;
|
|
int whiteout = 0;
|
|
struct nameidata nd;
|
|
|
|
switch (SCARG(uap, mode) & S_IFMT) {
|
|
case S_IFCHR:
|
|
case S_IFBLK:
|
|
error = suser(td);
|
|
break;
|
|
default:
|
|
error = suser_cred(td->td_ucred, PRISON_ROOT);
|
|
break;
|
|
}
|
|
if (error)
|
|
return (error);
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp != NULL) {
|
|
vrele(vp);
|
|
error = EEXIST;
|
|
} else {
|
|
VATTR_NULL(&vattr);
|
|
FILEDESC_LOCK(td->td_proc->p_fd);
|
|
vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ td->td_proc->p_fd->fd_cmask;
|
|
FILEDESC_UNLOCK(td->td_proc->p_fd);
|
|
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 (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
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);
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "mknod");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "mknod");
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Create a named pipe.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mkfifo_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
mkfifo(td, uap)
|
|
struct thread *td;
|
|
register struct mkfifo_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
if (nd.ni_vp != NULL) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vrele(nd.ni_vp);
|
|
vput(nd.ni_dvp);
|
|
return (EEXIST);
|
|
}
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_type = VFIFO;
|
|
FILEDESC_LOCK(td->td_proc->p_fd);
|
|
vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ td->td_proc->p_fd->fd_cmask;
|
|
FILEDESC_UNLOCK(td->td_proc->p_fd);
|
|
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);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a hard file link.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct link_args {
|
|
char *path;
|
|
char *link;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
link(td, uap)
|
|
struct thread *td;
|
|
register struct link_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(char *) link;
|
|
} */ *uap;
|
|
{
|
|
struct vnode *vp;
|
|
struct mount *mp;
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
bwillwrite();
|
|
NDINIT(&nd, LOOKUP, FOLLOW|NOOBJ, UIO_USERSPACE, SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type == VDIR) {
|
|
vrele(vp);
|
|
return (EPERM); /* POSIX */
|
|
}
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0) {
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
NDINIT(&nd, CREATE, LOCKPARENT|NOOBJ, UIO_USERSPACE, SCARG(uap, link), td);
|
|
if ((error = namei(&nd)) == 0) {
|
|
if (nd.ni_vp != NULL) {
|
|
vrele(nd.ni_vp);
|
|
error = EEXIST;
|
|
} else {
|
|
VOP_LEASE(nd.ni_dvp, td, td->td_ucred, LEASE_WRITE);
|
|
VOP_LEASE(vp, td, td->td_ucred, LEASE_WRITE);
|
|
error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd);
|
|
}
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
}
|
|
vrele(vp);
|
|
vn_finished_write(mp);
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "link");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "link");
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a symbolic link.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct symlink_args {
|
|
char *path;
|
|
char *link;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
symlink(td, uap)
|
|
struct thread *td;
|
|
register struct symlink_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(char *) link;
|
|
} */ *uap;
|
|
{
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
char *path;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
path = uma_zalloc(namei_zone, M_WAITOK);
|
|
if ((error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, NULL)) != 0)
|
|
goto out;
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT(&nd, CREATE, LOCKPARENT|NOOBJ, UIO_USERSPACE, SCARG(uap, link), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
goto out;
|
|
if (nd.ni_vp) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vrele(nd.ni_vp);
|
|
vput(nd.ni_dvp);
|
|
error = EEXIST;
|
|
goto out;
|
|
}
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
FILEDESC_LOCK(td->td_proc->p_fd);
|
|
vattr.va_mode = ACCESSPERMS &~ td->td_proc->p_fd->fd_cmask;
|
|
FILEDESC_UNLOCK(td->td_proc->p_fd);
|
|
VOP_LEASE(nd.ni_dvp, td, td->td_ucred, LEASE_WRITE);
|
|
error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, path);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (error == 0)
|
|
vput(nd.ni_vp);
|
|
vput(nd.ni_dvp);
|
|
vn_finished_write(mp);
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "symlink");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "symlink");
|
|
out:
|
|
uma_zfree(namei_zone, path);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Delete a whiteout from the filesystem.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
undelete(td, uap)
|
|
struct thread *td;
|
|
register struct undelete_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct mount *mp;
|
|
struct nameidata nd;
|
|
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT(&nd, DELETE, LOCKPARENT|DOWHITEOUT, UIO_USERSPACE,
|
|
SCARG(uap, path), td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
|
|
if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & ISWHITEOUT)) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (nd.ni_vp)
|
|
vrele(nd.ni_vp);
|
|
vput(nd.ni_dvp);
|
|
return (EEXIST);
|
|
}
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
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);
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "undelete");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "undelete");
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Delete a name from the filesystem.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct unlink_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
unlink(td, uap)
|
|
struct thread *td;
|
|
struct unlink_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT(&nd, DELETE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
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_flag & VROOT)
|
|
error = EBUSY;
|
|
}
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vrele(vp);
|
|
vput(nd.ni_dvp);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
VOP_LEASE(vp, td, td->td_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
if (!error) {
|
|
VOP_LEASE(nd.ni_dvp, td, td->td_ucred, LEASE_WRITE);
|
|
error = VOP_REMOVE(nd.ni_dvp, vp, &nd.ni_cnd);
|
|
}
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
vput(vp);
|
|
vn_finished_write(mp);
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "unlink");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "unlink");
|
|
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 /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) offset;
|
|
syscallarg(int) whence;
|
|
} */ *uap;
|
|
{
|
|
struct ucred *cred = td->td_ucred;
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
struct vattr vattr;
|
|
off_t offset;
|
|
int error, noneg;
|
|
|
|
if ((error = fget(td, uap->fd, &fp)) != 0)
|
|
return (error);
|
|
if (fp->f_type != DTYPE_VNODE) {
|
|
fdrop(fp, td);
|
|
return (ESPIPE);
|
|
}
|
|
vp = (struct vnode *)fp->f_data;
|
|
noneg = (vp->v_type != VCHR);
|
|
offset = SCARG(uap, offset);
|
|
switch (SCARG(uap, whence)) {
|
|
case L_INCR:
|
|
if (noneg &&
|
|
(fp->f_offset < 0 ||
|
|
(offset > 0 && fp->f_offset > OFF_MAX - offset)))
|
|
return (EOVERFLOW);
|
|
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)
|
|
return (error);
|
|
if (noneg &&
|
|
(vattr.va_size > OFF_MAX ||
|
|
(offset > 0 && vattr.va_size > OFF_MAX - offset)))
|
|
return (EOVERFLOW);
|
|
offset += vattr.va_size;
|
|
break;
|
|
case L_SET:
|
|
break;
|
|
default:
|
|
fdrop(fp, td);
|
|
return (EINVAL);
|
|
}
|
|
if (noneg && offset < 0)
|
|
return (EINVAL);
|
|
fp->f_offset = offset;
|
|
*(off_t *)(td->td_retval) = fp->f_offset;
|
|
fdrop(fp, td);
|
|
return (0);
|
|
}
|
|
|
|
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
|
|
/*
|
|
* 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 /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(long) offset;
|
|
syscallarg(int) whence;
|
|
} */ *uap;
|
|
{
|
|
struct lseek_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) offset;
|
|
syscallarg(int) whence;
|
|
} */ nuap;
|
|
int error;
|
|
|
|
SCARG(&nuap, fd) = SCARG(uap, fd);
|
|
SCARG(&nuap, offset) = SCARG(uap, offset);
|
|
SCARG(&nuap, whence) = SCARG(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;
|
|
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 /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
{
|
|
struct ucred *cred, *tmpcred;
|
|
register struct vnode *vp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
/*
|
|
* 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.
|
|
*
|
|
* XXX - Depending on how "threads" are finally implemented, it
|
|
* may be better to explicitly pass the credential to namei()
|
|
* rather than to modify the potentially shared process structure.
|
|
*/
|
|
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 | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
goto out1;
|
|
vp = nd.ni_vp;
|
|
|
|
error = vn_access(vp, SCARG(uap, flags), tmpcred, td);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(vp);
|
|
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 /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
{
|
|
struct nameidata nd;
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
|
|
error = vn_access(vp, SCARG(uap, flags), td->td_ucred, td);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
|
|
/*
|
|
* Get file status; this version follows links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ostat_args {
|
|
char *path;
|
|
struct ostat *ub;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
ostat(td, uap)
|
|
struct thread *td;
|
|
register struct ostat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct ostat *) ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
struct ostat osb;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = vn_stat(nd.ni_vp, &sb, td);
|
|
vput(nd.ni_vp);
|
|
if (error)
|
|
return (error);
|
|
cvtstat(&sb, &osb);
|
|
error = copyout((caddr_t)&osb, (caddr_t)SCARG(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
|
|
/* ARGSUSED */
|
|
int
|
|
olstat(td, uap)
|
|
struct thread *td;
|
|
register struct olstat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct ostat *) ub;
|
|
} */ *uap;
|
|
{
|
|
struct vnode *vp;
|
|
struct stat sb;
|
|
struct ostat osb;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
error = vn_stat(vp, &sb, td);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(vp);
|
|
if (error)
|
|
return (error);
|
|
cvtstat(&sb, &osb);
|
|
error = copyout((caddr_t)&osb, (caddr_t)SCARG(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 || COMPAT_SUNOS */
|
|
|
|
/*
|
|
* Get file status; this version follows links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct stat_args {
|
|
char *path;
|
|
struct stat *ub;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
stat(td, uap)
|
|
struct thread *td;
|
|
register struct stat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct stat *) ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
#ifdef LOOKUP_SHARED
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF | NOOBJ,
|
|
UIO_USERSPACE, SCARG(uap, path), td);
|
|
#else
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), td);
|
|
#endif
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = vn_stat(nd.ni_vp, &sb, td);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_vp);
|
|
if (error)
|
|
return (error);
|
|
error = copyout((caddr_t)&sb, (caddr_t)SCARG(uap, ub), sizeof (sb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get file status; this version does not follow links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lstat_args {
|
|
char *path;
|
|
struct stat *ub;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
lstat(td, uap)
|
|
struct thread *td;
|
|
register struct lstat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct stat *) ub;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct vnode *vp;
|
|
struct stat sb;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
error = vn_stat(vp, &sb, td);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(vp);
|
|
if (error)
|
|
return (error);
|
|
error = copyout((caddr_t)&sb, (caddr_t)SCARG(uap, ub), sizeof (sb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Implementation of the NetBSD stat() function.
|
|
* XXX This should probably be collapsed with the FreeBSD version,
|
|
* as the differences are only due to vn_stat() clearing spares at
|
|
* the end of the structures. vn_stat could be split to avoid this,
|
|
* and thus collapse the following to close to zero code.
|
|
*/
|
|
void
|
|
cvtnstat(sb, nsb)
|
|
struct stat *sb;
|
|
struct nstat *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_createtimespec = sb->st_createtimespec;
|
|
nsb->st_qspare = sb->st_qspare;
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct nstat_args {
|
|
char *path;
|
|
struct nstat *ub;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
nstat(td, uap)
|
|
struct thread *td;
|
|
register struct nstat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct nstat *) ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
struct nstat nsb;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = vn_stat(nd.ni_vp, &sb, td);
|
|
vput(nd.ni_vp);
|
|
if (error)
|
|
return (error);
|
|
cvtnstat(&sb, &nsb);
|
|
error = copyout((caddr_t)&nsb, (caddr_t)SCARG(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
|
|
/* ARGSUSED */
|
|
int
|
|
nlstat(td, uap)
|
|
struct thread *td;
|
|
register struct nlstat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct nstat *) ub;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct vnode *vp;
|
|
struct stat sb;
|
|
struct nstat nsb;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = vn_stat(vp, &sb, td);
|
|
vput(vp);
|
|
if (error)
|
|
return (error);
|
|
cvtnstat(&sb, &nsb);
|
|
error = copyout((caddr_t)&nsb, (caddr_t)SCARG(uap, ub), sizeof (nsb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get configurable pathname variables.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct pathconf_args {
|
|
char *path;
|
|
int name;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
pathconf(td, uap)
|
|
struct thread *td;
|
|
register struct pathconf_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) name;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = VOP_PATHCONF(nd.ni_vp, SCARG(uap, name), td->td_retval);
|
|
vput(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Return target name of a symbolic link.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct readlink_args {
|
|
char *path;
|
|
char *buf;
|
|
int count;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
readlink(td, uap)
|
|
struct thread *td;
|
|
register struct readlink_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(char *) buf;
|
|
syscallarg(int) count;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct iovec aiov;
|
|
struct uio auio;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type != VLNK)
|
|
error = EINVAL;
|
|
else {
|
|
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_td = td;
|
|
auio.uio_resid = SCARG(uap, count);
|
|
error = VOP_READLINK(vp, &auio, td->td_ucred);
|
|
}
|
|
vput(vp);
|
|
td->td_retval[0] = SCARG(uap, 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, PRISON_ROOT);
|
|
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;
|
|
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
|
|
/* ARGSUSED */
|
|
int
|
|
chflags(td, uap)
|
|
struct thread *td;
|
|
register struct chflags_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = setfflags(td, nd.ni_vp, SCARG(uap, flags));
|
|
vrele(nd.ni_vp);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Same as chflags() but doesn't follow symlinks.
|
|
*/
|
|
int
|
|
lchflags(td, uap)
|
|
struct thread *td;
|
|
register struct lchflags_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = setfflags(td, nd.ni_vp, SCARG(uap, flags));
|
|
vrele(nd.ni_vp);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Change flags of a file given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchflags_args {
|
|
int fd;
|
|
int flags;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
fchflags(td, uap)
|
|
struct thread *td;
|
|
register struct fchflags_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if ((error = getvnode(td->td_proc->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
error = setfflags(td, (struct vnode *) fp->f_data, SCARG(uap, flags));
|
|
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;
|
|
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
|
|
/* ARGSUSED */
|
|
int
|
|
chmod(td, uap)
|
|
struct thread *td;
|
|
register struct chmod_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = setfmode(td, nd.ni_vp, SCARG(uap, mode));
|
|
vrele(nd.ni_vp);
|
|
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
|
|
/* ARGSUSED */
|
|
int
|
|
lchmod(td, uap)
|
|
struct thread *td;
|
|
register struct lchmod_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = setfmode(td, nd.ni_vp, SCARG(uap, mode));
|
|
vrele(nd.ni_vp);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Change mode of a file given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchmod_args {
|
|
int fd;
|
|
int mode;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
fchmod(td, uap)
|
|
struct thread *td;
|
|
register struct fchmod_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
if ((error = getvnode(td->td_proc->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
error = setfmode(td, (struct vnode *)fp->f_data, SCARG(uap, mode));
|
|
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;
|
|
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
|
|
/* ARGSUSED */
|
|
int
|
|
chown(td, uap)
|
|
struct thread *td;
|
|
register struct chown_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) uid;
|
|
syscallarg(int) gid;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = setfown(td, nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid));
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a path name, do not cross symlinks.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lchown_args {
|
|
char *path;
|
|
int uid;
|
|
int gid;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
lchown(td, uap)
|
|
struct thread *td;
|
|
register struct lchown_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) uid;
|
|
syscallarg(int) gid;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = setfown(td, nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid));
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchown_args {
|
|
int fd;
|
|
int uid;
|
|
int gid;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
fchown(td, uap)
|
|
struct thread *td;
|
|
register struct fchown_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) uid;
|
|
syscallarg(int) gid;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
if ((error = getvnode(td->td_proc->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
error = setfown(td, (struct vnode *)fp->f_data,
|
|
SCARG(uap, uid), SCARG(uap, gid));
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common implementation code for utimes(), lutimes(), and futimes().
|
|
*/
|
|
static int
|
|
getutimes(usrtvp, tsp)
|
|
const struct timeval *usrtvp;
|
|
struct timespec *tsp;
|
|
{
|
|
struct timeval tv[2];
|
|
int error;
|
|
|
|
if (usrtvp == NULL) {
|
|
microtime(&tv[0]);
|
|
TIMEVAL_TO_TIMESPEC(&tv[0], &tsp[0]);
|
|
tsp[1] = tsp[0];
|
|
} else {
|
|
if ((error = copyin(usrtvp, tv, sizeof (tv))) != 0)
|
|
return (error);
|
|
TIMEVAL_TO_TIMESPEC(&tv[0], &tsp[0]);
|
|
TIMEVAL_TO_TIMESPEC(&tv[1], &tsp[1]);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Common implementation code for utimes(), lutimes(), and futimes().
|
|
*/
|
|
static int
|
|
setutimes(td, vp, ts, nullflag)
|
|
struct thread *td;
|
|
struct vnode *vp;
|
|
const struct timespec *ts;
|
|
int nullflag;
|
|
{
|
|
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_atime = ts[0];
|
|
vattr.va_mtime = ts[1];
|
|
if (nullflag)
|
|
vattr.va_vaflags |= VA_UTIMES_NULL;
|
|
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
|
|
/* ARGSUSED */
|
|
int
|
|
utimes(td, uap)
|
|
struct thread *td;
|
|
register struct utimes_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct timeval *) tptr;
|
|
} */ *uap;
|
|
{
|
|
struct timespec ts[2];
|
|
struct timeval *usrtvp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
usrtvp = SCARG(uap, tptr);
|
|
if ((error = getutimes(usrtvp, ts)) != 0)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = setutimes(td, nd.ni_vp, ts, usrtvp == NULL);
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the access and modification times of a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lutimes_args {
|
|
char *path;
|
|
struct timeval *tptr;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
lutimes(td, uap)
|
|
struct thread *td;
|
|
register struct lutimes_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct timeval *) tptr;
|
|
} */ *uap;
|
|
{
|
|
struct timespec ts[2];
|
|
struct timeval *usrtvp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
usrtvp = SCARG(uap, tptr);
|
|
if ((error = getutimes(usrtvp, ts)) != 0)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = setutimes(td, nd.ni_vp, ts, usrtvp == NULL);
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the access and modification times of a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct futimes_args {
|
|
int fd;
|
|
struct timeval *tptr;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
futimes(td, uap)
|
|
struct thread *td;
|
|
register struct futimes_args /* {
|
|
syscallarg(int ) fd;
|
|
syscallarg(struct timeval *) tptr;
|
|
} */ *uap;
|
|
{
|
|
struct timespec ts[2];
|
|
struct file *fp;
|
|
struct timeval *usrtvp;
|
|
int error;
|
|
|
|
usrtvp = SCARG(uap, tptr);
|
|
if ((error = getutimes(usrtvp, ts)) != 0)
|
|
return (error);
|
|
if ((error = getvnode(td->td_proc->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
error = setutimes(td, (struct vnode *)fp->f_data, ts, usrtvp == NULL);
|
|
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
|
|
/* ARGSUSED */
|
|
int
|
|
truncate(td, uap)
|
|
struct thread *td;
|
|
register struct truncate_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) length;
|
|
} */ *uap;
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
if (uap->length < 0)
|
|
return(EINVAL);
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0) {
|
|
vrele(vp);
|
|
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;
|
|
else if ((error = vn_writechk(vp)) == 0 &&
|
|
(error = VOP_ACCESS(vp, VWRITE, td->td_ucred, td)) == 0) {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_size = SCARG(uap, length);
|
|
error = VOP_SETATTR(vp, &vattr, td->td_ucred, td);
|
|
}
|
|
vput(vp);
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Truncate a file given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ftruncate_args {
|
|
int fd;
|
|
int pad;
|
|
off_t length;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
ftruncate(td, uap)
|
|
struct thread *td;
|
|
register struct ftruncate_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) length;
|
|
} */ *uap;
|
|
{
|
|
struct mount *mp;
|
|
struct vattr vattr;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if (uap->length < 0)
|
|
return(EINVAL);
|
|
if ((error = getvnode(td->td_proc->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
if ((fp->f_flag & FWRITE) == 0) {
|
|
fdrop(fp, td);
|
|
return (EINVAL);
|
|
}
|
|
vp = (struct vnode *)fp->f_data;
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0) {
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
VOP_LEASE(vp, td, td->td_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
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, td);
|
|
}
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vn_finished_write(mp);
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
|
|
/*
|
|
* Truncate a file given its path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct otruncate_args {
|
|
char *path;
|
|
long length;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
otruncate(td, uap)
|
|
struct thread *td;
|
|
register struct otruncate_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(long) length;
|
|
} */ *uap;
|
|
{
|
|
struct truncate_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) length;
|
|
} */ nuap;
|
|
|
|
SCARG(&nuap, path) = SCARG(uap, path);
|
|
SCARG(&nuap, length) = SCARG(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
|
|
/* ARGSUSED */
|
|
int
|
|
oftruncate(td, uap)
|
|
struct thread *td;
|
|
register struct oftruncate_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(long) length;
|
|
} */ *uap;
|
|
{
|
|
struct ftruncate_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) length;
|
|
} */ nuap;
|
|
|
|
SCARG(&nuap, fd) = SCARG(uap, fd);
|
|
SCARG(&nuap, length) = SCARG(uap, length);
|
|
return (ftruncate(td, &nuap));
|
|
}
|
|
#endif /* COMPAT_43 || COMPAT_SUNOS */
|
|
|
|
/*
|
|
* Sync an open file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fsync_args {
|
|
int fd;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
fsync(td, uap)
|
|
struct thread *td;
|
|
struct fsync_args /* {
|
|
syscallarg(int) fd;
|
|
} */ *uap;
|
|
{
|
|
struct vnode *vp;
|
|
struct mount *mp;
|
|
struct file *fp;
|
|
vm_object_t obj;
|
|
int error;
|
|
|
|
GIANT_REQUIRED;
|
|
|
|
if ((error = getvnode(td->td_proc->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0) {
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
if (VOP_GETVOBJECT(vp, &obj) == 0) {
|
|
vm_object_page_clean(obj, 0, 0, 0);
|
|
}
|
|
error = VOP_FSYNC(vp, fp->f_cred, MNT_WAIT, td);
|
|
#ifdef SOFTUPDATES
|
|
if (error == 0 && vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP))
|
|
error = softdep_fsync(vp);
|
|
#endif
|
|
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vn_finished_write(mp);
|
|
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
|
|
/* ARGSUSED */
|
|
int
|
|
rename(td, uap)
|
|
struct thread *td;
|
|
register struct rename_args /* {
|
|
syscallarg(char *) from;
|
|
syscallarg(char *) to;
|
|
} */ *uap;
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *tvp, *fvp, *tdvp;
|
|
struct nameidata fromnd, tond;
|
|
int error;
|
|
|
|
bwillwrite();
|
|
NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE,
|
|
SCARG(uap, from), td);
|
|
if ((error = namei(&fromnd)) != 0)
|
|
return (error);
|
|
fvp = fromnd.ni_vp;
|
|
if ((error = vn_start_write(fvp, &mp, V_WAIT | PCATCH)) != 0) {
|
|
NDFREE(&fromnd, NDF_ONLY_PNBUF);
|
|
vrele(fromnd.ni_dvp);
|
|
vrele(fvp);
|
|
goto out1;
|
|
}
|
|
NDINIT(&tond, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART | NOOBJ,
|
|
UIO_USERSPACE, SCARG(uap, 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);
|
|
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;
|
|
/*
|
|
* If source is the same as the destination (that is the
|
|
* same inode number with the same name in the same directory),
|
|
* then there is nothing to do.
|
|
*/
|
|
if (fvp == tvp && fromnd.ni_dvp == tdvp &&
|
|
fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen &&
|
|
!bcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr,
|
|
fromnd.ni_cnd.cn_namelen))
|
|
error = -1;
|
|
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 (tdvp == tvp)
|
|
vrele(tdvp);
|
|
else
|
|
vput(tdvp);
|
|
if (tvp)
|
|
vput(tvp);
|
|
vrele(fromnd.ni_dvp);
|
|
vrele(fvp);
|
|
}
|
|
vrele(tond.ni_startdir);
|
|
vn_finished_write(mp);
|
|
ASSERT_VOP_UNLOCKED(fromnd.ni_dvp, "rename");
|
|
ASSERT_VOP_UNLOCKED(fromnd.ni_vp, "rename");
|
|
ASSERT_VOP_UNLOCKED(tond.ni_dvp, "rename");
|
|
ASSERT_VOP_UNLOCKED(tond.ni_vp, "rename");
|
|
out1:
|
|
if (fromnd.ni_startdir)
|
|
vrele(fromnd.ni_startdir);
|
|
if (error == -1)
|
|
return (0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a directory file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mkdir_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
mkdir(td, uap)
|
|
struct thread *td;
|
|
register struct mkdir_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
|
|
return vn_mkdir(uap->path, uap->mode, UIO_USERSPACE, td);
|
|
}
|
|
|
|
int
|
|
vn_mkdir(path, mode, segflg, td)
|
|
char *path;
|
|
int mode;
|
|
enum uio_seg segflg;
|
|
struct thread *td;
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT(&nd, CREATE, LOCKPARENT, segflg, path, td);
|
|
nd.ni_cnd.cn_flags |= WILLBEDIR;
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp != NULL) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vrele(vp);
|
|
vput(nd.ni_dvp);
|
|
return (EEXIST);
|
|
}
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0)
|
|
return (error);
|
|
goto restart;
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_type = VDIR;
|
|
FILEDESC_LOCK(td->td_proc->p_fd);
|
|
vattr.va_mode = (mode & ACCESSPERMS) &~ td->td_proc->p_fd->fd_cmask;
|
|
FILEDESC_UNLOCK(td->td_proc->p_fd);
|
|
VOP_LEASE(nd.ni_dvp, td, td->td_ucred, LEASE_WRITE);
|
|
error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vput(nd.ni_dvp);
|
|
if (!error)
|
|
vput(nd.ni_vp);
|
|
vn_finished_write(mp);
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "mkdir");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "mkdir");
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Remove a directory file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct rmdir_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
rmdir(td, uap)
|
|
struct thread *td;
|
|
struct rmdir_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
restart:
|
|
bwillwrite();
|
|
NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), td);
|
|
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;
|
|
goto out;
|
|
}
|
|
if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vput(vp);
|
|
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);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vput(vp);
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "rmdir");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "rmdir");
|
|
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 /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(char *) buf;
|
|
syscallarg(u_int) count;
|
|
syscallarg(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;
|
|
long loff;
|
|
|
|
/* XXX arbitrary sanity limit on `count'. */
|
|
if (SCARG(uap, count) > 64 * 1024)
|
|
return (EINVAL);
|
|
if ((error = getvnode(td->td_proc->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
if ((fp->f_flag & FREAD) == 0) {
|
|
fdrop(fp, td);
|
|
return (EBADF);
|
|
}
|
|
vp = (struct vnode *)fp->f_data;
|
|
unionread:
|
|
if (vp->v_type != VDIR) {
|
|
fdrop(fp, td);
|
|
return (EINVAL);
|
|
}
|
|
aiov.iov_base = SCARG(uap, buf);
|
|
aiov.iov_len = SCARG(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 = SCARG(uap, count);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
loff = auio.uio_offset = fp->f_offset;
|
|
# 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 = SCARG(uap, count);
|
|
MALLOC(dirbuf, caddr_t, SCARG(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 = SCARG(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) {
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
if (SCARG(uap, count) == auio.uio_resid) {
|
|
if (union_dircheckp) {
|
|
error = union_dircheckp(td, &vp, fp);
|
|
if (error == -1)
|
|
goto unionread;
|
|
if (error) {
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
}
|
|
if ((vp->v_flag & VROOT) &&
|
|
(vp->v_mount->mnt_flag & MNT_UNION)) {
|
|
struct vnode *tvp = vp;
|
|
vp = vp->v_mount->mnt_vnodecovered;
|
|
VREF(vp);
|
|
fp->f_data = (caddr_t) vp;
|
|
fp->f_offset = 0;
|
|
vrele(tvp);
|
|
goto unionread;
|
|
}
|
|
}
|
|
error = copyout((caddr_t)&loff, (caddr_t)SCARG(uap, basep),
|
|
sizeof(long));
|
|
fdrop(fp, td);
|
|
td->td_retval[0] = SCARG(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 /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(char *) buf;
|
|
syscallarg(u_int) count;
|
|
syscallarg(long *) basep;
|
|
} */ *uap;
|
|
{
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
struct uio auio;
|
|
struct iovec aiov;
|
|
long loff;
|
|
int error, eofflag;
|
|
|
|
if ((error = getvnode(td->td_proc->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
if ((fp->f_flag & FREAD) == 0) {
|
|
fdrop(fp, td);
|
|
return (EBADF);
|
|
}
|
|
vp = (struct vnode *)fp->f_data;
|
|
unionread:
|
|
if (vp->v_type != VDIR) {
|
|
fdrop(fp, td);
|
|
return (EINVAL);
|
|
}
|
|
aiov.iov_base = SCARG(uap, buf);
|
|
aiov.iov_len = SCARG(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 = SCARG(uap, count);
|
|
/* vn_lock(vp, LK_SHARED | LK_RETRY, td); */
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
loff = auio.uio_offset = fp->f_offset;
|
|
error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, NULL, NULL);
|
|
fp->f_offset = auio.uio_offset;
|
|
VOP_UNLOCK(vp, 0, td);
|
|
if (error) {
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
if (SCARG(uap, count) == auio.uio_resid) {
|
|
if (union_dircheckp) {
|
|
error = union_dircheckp(td, &vp, fp);
|
|
if (error == -1)
|
|
goto unionread;
|
|
if (error) {
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
}
|
|
if ((vp->v_flag & VROOT) &&
|
|
(vp->v_mount->mnt_flag & MNT_UNION)) {
|
|
struct vnode *tvp = vp;
|
|
vp = vp->v_mount->mnt_vnodecovered;
|
|
VREF(vp);
|
|
fp->f_data = (caddr_t) vp;
|
|
fp->f_offset = 0;
|
|
vrele(tvp);
|
|
goto unionread;
|
|
}
|
|
}
|
|
if (SCARG(uap, basep) != NULL) {
|
|
error = copyout((caddr_t)&loff, (caddr_t)SCARG(uap, basep),
|
|
sizeof(long));
|
|
}
|
|
td->td_retval[0] = SCARG(uap, count) - auio.uio_resid;
|
|
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 /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(char *) buf;
|
|
syscallarg(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 /* {
|
|
syscallarg(int) newmask;
|
|
} */ *uap;
|
|
{
|
|
register struct filedesc *fdp;
|
|
|
|
FILEDESC_LOCK(td->td_proc->p_fd);
|
|
fdp = td->td_proc->p_fd;
|
|
td->td_retval[0] = fdp->fd_cmask;
|
|
fdp->fd_cmask = SCARG(uap, newmask) & ALLPERMS;
|
|
FILEDESC_UNLOCK(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
|
|
/* ARGSUSED */
|
|
int
|
|
revoke(td, uap)
|
|
struct thread *td;
|
|
register struct revoke_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
{
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, SCARG(uap, path),
|
|
td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (vp->v_type != VCHR) {
|
|
vput(vp);
|
|
return (EINVAL);
|
|
}
|
|
error = VOP_GETATTR(vp, &vattr, td->td_ucred, td);
|
|
if (error) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
VOP_UNLOCK(vp, 0, td);
|
|
if (td->td_ucred->cr_uid != vattr.va_uid) {
|
|
error = suser_cred(td->td_ucred, PRISON_ROOT);
|
|
if (error)
|
|
goto out;
|
|
}
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
|
|
goto out;
|
|
if (vcount(vp) > 1)
|
|
VOP_REVOKE(vp, REVOKEALL);
|
|
vn_finished_write(mp);
|
|
out:
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Convert a user file descriptor to a kernel file entry.
|
|
* The file entry is locked 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_type != DTYPE_VNODE && fp->f_type != DTYPE_FIFO) {
|
|
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 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 error;
|
|
|
|
/*
|
|
* Must be super user
|
|
*/
|
|
error = suser(td);
|
|
if (error)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
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);
|
|
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.
|
|
*/
|
|
#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 /* {
|
|
syscallarg(const struct fhandle *) u_fhp;
|
|
syscallarg(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 indx;
|
|
|
|
/*
|
|
* Must be super user
|
|
*/
|
|
error = suser(td);
|
|
if (error)
|
|
return (error);
|
|
|
|
fmode = FFLAGS(SCARG(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(SCARG(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);
|
|
/* now give me my vnode, it gets returned to me locked */
|
|
error = VFS_FHTOVP(mp, &fhp.fh_fid, &vp);
|
|
if (error)
|
|
return (error);
|
|
/*
|
|
* 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 (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);
|
|
return (error);
|
|
}
|
|
VOP_LEASE(vp, td, td->td_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); /* XXX */
|
|
VATTR_NULL(vap);
|
|
vap->va_size = 0;
|
|
error = VOP_SETATTR(vp, vap, td->td_ucred, td);
|
|
vn_finished_write(mp);
|
|
if (error)
|
|
goto bad;
|
|
}
|
|
error = VOP_OPEN(vp, fmode, td->td_ucred, td);
|
|
if (error)
|
|
goto bad;
|
|
/*
|
|
* Make sure that a VM object is created for VMIO support.
|
|
*/
|
|
if (vn_canvmio(vp) == TRUE) {
|
|
if ((error = vfs_object_create(vp, td, td->td_ucred)) != 0)
|
|
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;
|
|
}
|
|
fp = nfp;
|
|
|
|
/*
|
|
* Hold an extra reference to avoid having fp ripped out
|
|
* from under us while we block in the lock op
|
|
*/
|
|
fhold(fp);
|
|
nfp->f_data = (caddr_t)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.
|
|
*/
|
|
FILEDESC_LOCK(fdp);
|
|
if (fdp->fd_ofiles[indx] == fp) {
|
|
fdp->fd_ofiles[indx] = NULL;
|
|
FILEDESC_UNLOCK(fdp);
|
|
fdrop(fp, td);
|
|
} else
|
|
FILEDESC_UNLOCK(fdp);
|
|
/*
|
|
* release our private reference
|
|
*/
|
|
fdrop(fp, td);
|
|
return(error);
|
|
}
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
fp->f_flag |= FHASLOCK;
|
|
}
|
|
if ((vp->v_type == VREG) && (VOP_GETVOBJECT(vp, NULL) != 0))
|
|
vfs_object_create(vp, td, td->td_ucred);
|
|
|
|
VOP_UNLOCK(vp, 0, td);
|
|
fdrop(fp, td);
|
|
td->td_retval[0] = indx;
|
|
return (0);
|
|
|
|
bad:
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Stat an (NFS) file handle.
|
|
*/
|
|
#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 /* {
|
|
syscallarg(struct fhandle *) u_fhp;
|
|
syscallarg(struct stat *) sb;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
fhandle_t fh;
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
/*
|
|
* Must be super user
|
|
*/
|
|
error = suser(td);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = copyin(SCARG(uap, u_fhp), &fh, sizeof(fhandle_t));
|
|
if (error)
|
|
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, td);
|
|
vput(vp);
|
|
if (error)
|
|
return (error);
|
|
error = copyout(&sb, SCARG(uap, sb), sizeof(sb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Implement fstatfs() for (NFS) file handles.
|
|
*/
|
|
#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 /* {
|
|
syscallarg(struct fhandle) *u_fhp;
|
|
syscallarg(struct statfs) *buf;
|
|
} */ *uap;
|
|
{
|
|
struct statfs *sp;
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
struct statfs sb;
|
|
fhandle_t fh;
|
|
int error;
|
|
|
|
/*
|
|
* Must be super user
|
|
*/
|
|
error = suser(td);
|
|
if (error)
|
|
return (error);
|
|
|
|
if ((error = copyin(SCARG(uap, u_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;
|
|
sp = &mp->mnt_stat;
|
|
vput(vp);
|
|
if ((error = VFS_STATFS(mp, sp, td)) != 0)
|
|
return (error);
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
if (suser(td)) {
|
|
bcopy((caddr_t)sp, (caddr_t)&sb, sizeof(sb));
|
|
sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;
|
|
sp = &sb;
|
|
}
|
|
return (copyout(sp, SCARG(uap, buf), sizeof(*sp)));
|
|
}
|
|
|
|
/*
|
|
* 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 /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) cmd;
|
|
syscallarg(const char *) filename;
|
|
syscallarg(int) attrnamespace;
|
|
syscallarg(const char *) attrname;
|
|
} */ *uap;
|
|
{
|
|
struct vnode *filename_vp;
|
|
struct nameidata nd;
|
|
struct mount *mp, *mp_writable;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int error;
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
/*
|
|
* 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, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
uap->filename, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
filename_vp = nd.ni_vp;
|
|
NDFREE(&nd, NDF_NO_VP_RELE | NDF_NO_VP_UNLOCK);
|
|
}
|
|
|
|
/* uap->path is always defined. */
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, td);
|
|
if ((error = namei(&nd)) != 0) {
|
|
if (filename_vp != NULL)
|
|
vput(filename_vp);
|
|
return (error);
|
|
}
|
|
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);
|
|
return (error);
|
|
}
|
|
|
|
if (uap->attrname != NULL) {
|
|
error = VFS_EXTATTRCTL(mp, uap->cmd, filename_vp,
|
|
uap->attrnamespace, attrname, td);
|
|
} else {
|
|
error = VFS_EXTATTRCTL(mp, uap->cmd, filename_vp,
|
|
uap->attrnamespace, 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);
|
|
|
|
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;
|
|
|
|
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);
|
|
|
|
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;
|
|
|
|
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_file(td, uap)
|
|
struct thread *td;
|
|
struct extattr_set_file_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) attrnamespace;
|
|
syscallarg(const char *) attrname;
|
|
syscallarg(void *) data;
|
|
syscallarg(size_t) nbytes;
|
|
} */ *uap;
|
|
{
|
|
struct nameidata nd;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int error;
|
|
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
|
|
error = extattr_set_vp(nd.ni_vp, uap->attrnamespace, attrname,
|
|
uap->data, uap->nbytes, td);
|
|
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
extattr_set_fd(td, uap)
|
|
struct thread *td;
|
|
struct extattr_set_fd_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) attrnamespace;
|
|
syscallarg(const char *) attrname;
|
|
syscallarg(void *) data;
|
|
syscallarg(size_t) nbytes;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int error;
|
|
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
if ((error = getvnode(td->td_proc->p_fd, uap->fd, &fp)) != 0)
|
|
return (error);
|
|
|
|
error = extattr_set_vp((struct vnode *)fp->f_data, uap->attrnamespace,
|
|
attrname, uap->data, uap->nbytes, td);
|
|
fdrop(fp, td);
|
|
|
|
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;
|
|
|
|
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_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;
|
|
|
|
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_file(td, uap)
|
|
struct thread *td;
|
|
struct extattr_get_file_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) attrnamespace;
|
|
syscallarg(const char *) attrname;
|
|
syscallarg(void *) data;
|
|
syscallarg(size_t) nbytes;
|
|
} */ *uap;
|
|
{
|
|
struct nameidata nd;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int error;
|
|
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
|
|
error = extattr_get_vp(nd.ni_vp, uap->attrnamespace, attrname,
|
|
uap->data, uap->nbytes, td);
|
|
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
extattr_get_fd(td, uap)
|
|
struct thread *td;
|
|
struct extattr_get_fd_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) attrnamespace;
|
|
syscallarg(const char *) attrname;
|
|
syscallarg(void *) data;
|
|
syscallarg(size_t) nbytes;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int error;
|
|
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
if ((error = getvnode(td->td_proc->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
|
|
error = extattr_get_vp((struct vnode *)fp->f_data, uap->attrnamespace,
|
|
attrname, uap->data, uap->nbytes, td);
|
|
|
|
fdrop(fp, td);
|
|
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;
|
|
|
|
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);
|
|
|
|
error = VOP_SETEXTATTR(vp, attrnamespace, attrname, NULL, td->td_ucred,
|
|
td);
|
|
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
extattr_delete_file(td, uap)
|
|
struct thread *td;
|
|
struct extattr_delete_file_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) attrnamespace;
|
|
syscallarg(const char *) attrname;
|
|
} */ *uap;
|
|
{
|
|
struct nameidata nd;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int error;
|
|
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return(error);
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, td);
|
|
if ((error = namei(&nd)) != 0)
|
|
return(error);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
|
|
error = extattr_delete_vp(nd.ni_vp, uap->attrnamespace, attrname, td);
|
|
|
|
vrele(nd.ni_vp);
|
|
return(error);
|
|
}
|
|
|
|
int
|
|
extattr_delete_fd(td, uap)
|
|
struct thread *td;
|
|
struct extattr_delete_fd_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) attrnamespace;
|
|
syscallarg(const char *) attrname;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int error;
|
|
|
|
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
if ((error = getvnode(td->td_proc->p_fd, uap->fd, &fp)) != 0)
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
|
|
error = extattr_delete_vp((struct vnode *)fp->f_data,
|
|
uap->attrnamespace, attrname, td);
|
|
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|