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7b77e0fa50
freebsd-nq/sys/kern/vfs_syscalls.c
Robert Watson b1fc0ec1a7 o Merge contents of struct pcred into struct ucred. Specifically, add the 
real uid, saved uid, real gid, and saved gid to ucred, as well as the
  pcred->pc_uidinfo, which was associated with the real uid, only rename
  it to cr_ruidinfo so as not to conflict with cr_uidinfo, which
  corresponds to the effective uid.
o Remove p_cred from struct proc; add p_ucred to struct proc, replacing
  original macro that pointed.
  p->p_ucred to p->p_cred->pc_ucred.
o Universally update code so that it makes use of ucred instead of pcred,
  p->p_ucred instead of p->p_pcred, cr_ruidinfo instead of p_uidinfo,
  cr_{r,sv}{u,g}id instead of p_*, etc.
o Remove pcred0 and its initialization from init_main.c; initialize
  cr_ruidinfo there.
o Restruction many credential modification chunks to always crdup while
  we figure out locking and optimizations; generally speaking, this
  means moving to a structure like this:
        newcred = crdup(oldcred);
        ...
        p->p_ucred = newcred;
        crfree(oldcred);
  It's not race-free, but better than nothing.  There are also races
  in sys_process.c, all inter-process authorization, fork, exec, and
  exit.
o Remove sigio->sio_ruid since sigio->sio_ucred now contains the ruid;
  remove comments indicating that the old arrangement was a problem.
o Restructure exec1() a little to use newcred/oldcred arrangement, and
  use improved uid management primitives.
o Clean up exit1() so as to do less work in credential cleanup due to
  pcred removal.
o Clean up fork1() so as to do less work in credential cleanup and
  allocation.
o Clean up ktrcanset() to take into account changes, and move to using
  suser_xxx() instead of performing a direct uid==0 comparision.
o Improve commenting in various kern_prot.c credential modification
  calls to better document current behavior.  In a couple of places,
  current behavior is a little questionable and we need to check
  POSIX.1 to make sure it's "right".  More commenting work still
  remains to be done.
o Update credential management calls, such as crfree(), to take into
  account new ruidinfo reference.
o Modify or add the following uid and gid helper routines:
      change_euid()
      change_egid()
      change_ruid()
      change_rgid()
      change_svuid()
      change_svgid()
  In each case, the call now acts on a credential not a process, and as
  such no longer requires more complicated process locking/etc.  They
  now assume the caller will do any necessary allocation of an
  exclusive credential reference.  Each is commented to document its
  reference requirements.
o CANSIGIO() is simplified to require only credentials, not processes
  and pcreds.
o Remove lots of (p_pcred==NULL) checks.
o Add an XXX to authorization code in nfs_lock.c, since it's
  questionable, and needs to be considered carefully.
o Simplify posix4 authorization code to require only credentials, not
  processes and pcreds.  Note that this authorization, as well as
  CANSIGIO(), needs to be updated to use the p_cansignal() and
  p_cansched() centralized authorization routines, as they currently
  do not take into account some desirable restrictions that are handled
  by the centralized routines, as well as being inconsistent with other
  similar authorization instances.
o Update libkvm to take these changes into account.

Obtained from:	TrustedBSD Project
Reviewed by:	green, bde, jhb, freebsd-arch, freebsd-audit
2001-05-25 16:59:11 +00:00

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/*
* 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 <machine/limits.h>
#include <sys/sysctl.h>
#include <vm/vm.h>
#include <vm/vm_object.h>
#include <vm/vm_zone.h>
#include <vm/vm_page.h>
static int change_dir __P((struct nameidata *ndp, struct proc *p));
static void checkdirs __P((struct vnode *olddp, struct vnode *newdp));
static int chroot_refuse_vdir_fds __P((struct filedesc *fdp));
static int getutimes __P((const struct timeval *, struct timespec *));
static int setfown __P((struct proc *, struct vnode *, uid_t, gid_t));
static int setfmode __P((struct proc *, struct vnode *, int));
static int setfflags __P((struct proc *, struct vnode *, int));
static int setutimes __P((struct proc *, struct vnode *,
const struct timespec *, int));
static int usermount = 0; /* if 1, non-root can mount fs. */
int (*union_dircheckp) __P((struct proc *, struct vnode **, struct file *));
SYSCTL_INT(_vfs, OID_AUTO, usermount, CTLFLAG_RW, &usermount, 0, "");
/*
* Virtual File System System Calls
*/
/*
* Mount a file system.
*/
#ifndef _SYS_SYSPROTO_H_
struct mount_args {
char *type;
char *path;
int flags;
caddr_t data;
};
#endif
/* ARGSUSED */
int
mount(p, uap)
struct proc *p;
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 | M_ZERO);
fspath = malloc(MNAMELEN, M_TEMP, M_WAITOK | M_ZERO);
/*
* 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(p, 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(p, fstype, fspath, fsflags, fsdata)
struct proc *p;
char *fstype;
char *fspath;
int fsflags;
void *fsdata;
{
struct vnode *vp;
struct mount *mp;
struct vfsconf *vfsp;
int error, flag = 0, flag2 = 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 - 1) ||
(strlen(fspath) >= MNAMELEN - 1))
return (ENAMETOOLONG);
if (usermount == 0 && (error = suser(p)))
return (error);
/*
* Do not allow NFS export by non-root users.
*/
if (fsflags & MNT_EXPORTED) {
error = suser(p);
if (error)
return (error);
}
/*
* Silently enforce MNT_NOSUID and MNT_NODEV for non-root users
*/
if (suser_xxx(p->p_ucred, 0, 0))
fsflags |= MNT_NOSUID | MNT_NODEV;
/*
* Get vnode to be covered
*/
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspath, p);
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;
flag2 = 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 != p->p_ucred->cr_uid &&
(error = suser(p))) {
vput(vp);
return (error);
}
if (vfs_busy(mp, LK_NOWAIT, 0, p)) {
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, p);
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, p);
goto update;
}
/*
* If the user is not root, ensure that they own the directory
* onto which we are attempting to mount.
*/
if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)) ||
(va.va_uid != p->p_ucred->cr_uid &&
(error = suser(p)))) {
vput(vp);
return (error);
}
if ((error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 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) {
linker_file_t lf;
/* Only load modules for root (very important!) */
if ((error = suser(p)) != 0) {
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++;
/* lookup again, 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);
lockinit(&mp->mnt_lock, PVFS, "vfslock", 0, LK_NOPAUSE);
(void)vfs_busy(mp, LK_NOWAIT, 0, p);
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_stat.f_fstypename[MFSNAMELEN - 1] = '\0';
mp->mnt_vnodecovered = vp;
mp->mnt_stat.f_owner = p->p_ucred->cr_uid;
strncpy(mp->mnt_stat.f_mntonname, fspath, MNAMELEN);
mp->mnt_stat.f_mntonname[MNAMELEN - 1] = '\0';
mp->mnt_iosize_max = DFLTPHYS;
VOP_UNLOCK(vp, 0, p);
update:
/*
* 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_NOSUID | MNT_NOEXEC | MNT_NODEV |
MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOATIME |
MNT_NOSYMFOLLOW | MNT_IGNORE |
MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR);
mp->mnt_flag |= fsflags & (MNT_NOSUID | MNT_NOEXEC |
MNT_NODEV | MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_FORCE |
MNT_NOSYMFOLLOW | MNT_IGNORE |
MNT_NOATIME | MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR);
/*
* 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, p);
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 = flag2;
}
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, p);
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, p);
/*
* 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, p);
if ((mp->mnt_flag & MNT_RDONLY) == 0)
error = vfs_allocate_syncvnode(mp);
vfs_unbusy(mp, p);
if ((error = VFS_START(mp, 0, p)) != 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, p);
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;
if (olddp->v_usecount == 1)
return;
sx_slock(&allproc_lock);
LIST_FOREACH(p, &allproc, p_list) {
fdp = p->p_fd;
if (fdp == NULL)
continue;
if (fdp->fd_cdir == olddp) {
vrele(fdp->fd_cdir);
VREF(newdp);
fdp->fd_cdir = newdp;
}
if (fdp->fd_rdir == olddp) {
vrele(fdp->fd_rdir);
VREF(newdp);
fdp->fd_rdir = newdp;
}
}
sx_sunlock(&allproc_lock);
if (rootvnode == olddp) {
vrele(rootvnode);
VREF(newdp);
rootvnode = newdp;
}
}
/*
* Unmount a file system.
*
* 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(p, uap)
struct proc *p;
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), p);
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 != p->p_ucred->cr_uid) &&
(error = suser(p))) {
vput(vp);
return (error);
}
/*
* Don't allow unmounting the root file system.
*/
if (mp->mnt_flag & MNT_ROOTFS) {
vput(vp);
return (EINVAL);
}
/*
* Must be the root of the filesystem
*/
if ((vp->v_flag & VROOT) == 0) {
vput(vp);
return (EINVAL);
}
vput(vp);
return (dounmount(mp, SCARG(uap, flags), p));
}
/*
* Do the actual file system unmount.
*/
int
dounmount(mp, flags, p)
struct mount *mp;
int flags;
struct proc *p;
{
struct vnode *coveredvp, *fsrootvp;
int error;
int async_flag;
mtx_lock(&mountlist_mtx);
mp->mnt_kern_flag |= MNTK_UNMOUNT;
lockmgr(&mp->mnt_lock, LK_DRAIN | LK_INTERLOCK, &mountlist_mtx, p);
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, p->p_ucred, p)) == 0) ||
(flags & MNT_FORCE)) {
error = VFS_UNMOUNT(mp, flags, p);
}
vn_finished_write(mp);
mtx_lock(&mountlist_mtx);
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);
mp->mnt_kern_flag &= ~MNTK_UNMOUNT;
mp->mnt_flag |= async_flag;
lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK | LK_REENABLE,
&mountlist_mtx, p);
if (mp->mnt_kern_flag & MNTK_MWAIT)
wakeup((caddr_t)mp);
return (error);
}
TAILQ_REMOVE(&mountlist, mp, mnt_list);
if ((coveredvp = mp->mnt_vnodecovered) != NULLVP) {
coveredvp->v_mountedhere = (struct mount *)0;
vrele(coveredvp);
}
mp->mnt_vfc->vfc_refcount--;
if (!LIST_EMPTY(&mp->mnt_vnodelist))
panic("unmount: dangling vnode");
lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK, &mountlist_mtx, p);
lockdestroy(&mp->mnt_lock);
if (mp->mnt_kern_flag & MNTK_MWAIT)
wakeup((caddr_t)mp);
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(p, uap)
struct proc *p;
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, p)) {
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,
((p != NULL) ? p->p_ucred : NOCRED), p);
mp->mnt_flag |= asyncflag;
vn_finished_write(mp);
}
mtx_lock(&mountlist_mtx);
nmp = TAILQ_NEXT(mp, mnt_list);
vfs_unbusy(mp, p);
}
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(p, uap)
struct proc *p;
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(p->p_ucred) && !prison_quotas)
return (EPERM);
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
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), p);
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(p, uap)
struct proc *p;
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), p);
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, p);
if (error)
return (error);
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
if (suser_xxx(p->p_ucred, 0, 0)) {
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(p, uap)
struct proc *p;
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(p->p_fd, SCARG(uap, fd), &fp)) != 0)
return (error);
mp = ((struct vnode *)fp->f_data)->v_mount;
sp = &mp->mnt_stat;
error = VFS_STATFS(mp, sp, p);
if (error)
return (error);
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
if (suser_xxx(p->p_ucred, 0, 0)) {
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(p, uap)
struct proc *p;
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, p)) {
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, p))) {
mtx_lock(&mountlist_mtx);
nmp = TAILQ_NEXT(mp, mnt_list);
vfs_unbusy(mp, p);
continue;
}
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
error = copyout((caddr_t)sp, sfsp, sizeof(*sp));
if (error) {
vfs_unbusy(mp, p);
return (error);
}
sfsp += sizeof(*sp);
}
count++;
mtx_lock(&mountlist_mtx);
nmp = TAILQ_NEXT(mp, mnt_list);
vfs_unbusy(mp, p);
}
mtx_unlock(&mountlist_mtx);
if (sfsp && count > maxcount)
p->p_retval[0] = maxcount;
else
p->p_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(p, uap)
struct proc *p;
struct fchdir_args /* {
syscallarg(int) fd;
} */ *uap;
{
register struct filedesc *fdp = p->p_fd;
struct vnode *vp, *tdp;
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);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
if (vp->v_type != VDIR)
error = ENOTDIR;
else
error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);
while (!error && (mp = vp->v_mountedhere) != NULL) {
if (vfs_busy(mp, 0, 0, p))
continue;
error = VFS_ROOT(mp, &tdp);
vfs_unbusy(mp, p);
if (error)
break;
vput(vp);
vp = tdp;
}
if (error) {
vput(vp);
return (error);
}
VOP_UNLOCK(vp, 0, p);
vrele(fdp->fd_cdir);
fdp->fd_cdir = vp;
return (0);
}
/*
* Change current working directory (``.'').
*/
#ifndef _SYS_SYSPROTO_H_
struct chdir_args {
char *path;
};
#endif
/* ARGSUSED */
int
chdir(p, uap)
struct proc *p;
struct chdir_args /* {
syscallarg(char *) path;
} */ *uap;
{
register struct filedesc *fdp = p->p_fd;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
SCARG(uap, path), p);
if ((error = change_dir(&nd, p)) != 0)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);
vrele(fdp->fd_cdir);
fdp->fd_cdir = nd.ni_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 error;
int fd;
for (fd = 0; fd < fdp->fd_nfiles ; fd++) {
error = getvnode(fdp, fd, &fp);
if (error)
continue;
vp = (struct vnode *)fp->f_data;
if (vp->v_type != VDIR)
continue;
return(EPERM);
}
return (0);
}
/*
* This sysctl determines if we will allow a process to chroot(2) if it
* has a directory open:
* 0: disallowed for all processes.
* 1: allowed for processes that were not already chroot(2)'ed.
* 2: allowed for all processes.
*/
static int chroot_allow_open_directories = 1;
SYSCTL_INT(_kern, OID_AUTO, chroot_allow_open_directories, CTLFLAG_RW,
&chroot_allow_open_directories, 0, "");
/*
* Change notion of root (``/'') directory.
*/
#ifndef _SYS_SYSPROTO_H_
struct chroot_args {
char *path;
};
#endif
/* ARGSUSED */
int
chroot(p, uap)
struct proc *p;
struct chroot_args /* {
syscallarg(char *) path;
} */ *uap;
{
register struct filedesc *fdp = p->p_fd;
int error;
struct nameidata nd;
error = suser_xxx(0, p, PRISON_ROOT);
if (error)
return (error);
if (chroot_allow_open_directories == 0 ||
(chroot_allow_open_directories == 1 && fdp->fd_rdir != rootvnode))
error = chroot_refuse_vdir_fds(fdp);
if (error)
return (error);
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
SCARG(uap, path), p);
if ((error = change_dir(&nd, p)) != 0)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);
vrele(fdp->fd_rdir);
fdp->fd_rdir = nd.ni_vp;
if (!fdp->fd_jdir) {
fdp->fd_jdir = nd.ni_vp;
VREF(fdp->fd_jdir);
}
return (0);
}
/*
* Common routine for chroot and chdir.
*/
static int
change_dir(ndp, p)
register struct nameidata *ndp;
struct proc *p;
{
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, p->p_ucred, p);
if (error)
vput(vp);
else
VOP_UNLOCK(vp, 0, p);
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(p, uap)
struct proc *p;
register struct open_args /* {
syscallarg(char *) path;
syscallarg(int) flags;
syscallarg(int) mode;
} */ *uap;
{
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(p, &nfp, &indx);
if (error)
return (error);
fp = nfp;
cmode = ((SCARG(uap, mode) &~ fdp->fd_cmask) & ALLPERMS) &~ S_ISTXT;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
p->p_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, p);
/*
* handle special fdopen() case. bleh. dupfdopen() is
* responsible for dropping the old contents of ofiles[indx]
* if it succeeds.
*/
if ((error == ENODEV || error == ENXIO) &&
p->p_dupfd >= 0 && /* XXX from fdopen */
(error =
dupfdopen(p, fdp, indx, p->p_dupfd, flags, error)) == 0) {
p->p_retval[0] = indx;
return (0);
}
/*
* Clean up the descriptor, but only if another thread hadn't
* replaced or closed it.
*/
if (fdp->fd_ofiles[indx] == fp) {
fdp->fd_ofiles[indx] = NULL;
fdrop(fp, p);
}
if (error == ERESTART)
error = EINTR;
return (error);
}
p->p_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.
*/
if (fp->f_count == 1) {
KASSERT(fdp->fd_ofiles[indx] != fp,
("Open file descriptor lost all refs"));
VOP_UNLOCK(vp, 0, p);
vn_close(vp, flags & FMASK, fp->f_cred, p);
fdrop(fp, p);
p->p_retval[0] = indx;
return 0;
}
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);
VOP_UNLOCK(vp, 0, p);
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, p, p->p_ucred, LEASE_WRITE);
VATTR_NULL(&vat);
vat.va_size = 0;
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
error = VOP_SETATTR(vp, &vat, p->p_ucred, p);
VOP_UNLOCK(vp, 0, p);
vn_finished_write(mp);
if (error)
goto bad;
}
/* 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"));
/*
* Release our private reference, leaving the one associated with
* the descriptor table intact.
*/
fdrop(fp, p);
p->p_retval[0] = indx;
return (0);
bad:
if (fdp->fd_ofiles[indx] == fp) {
fdp->fd_ofiles[indx] = NULL;
fdrop(fp, p);
}
fdrop(fp, p);
return (error);
}
#ifdef COMPAT_43
/*
* Create a file.
*/
#ifndef _SYS_SYSPROTO_H_
struct ocreat_args {
char *path;
int mode;
};
#endif
int
ocreat(p, uap)
struct proc *p;
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(p, &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(p, uap)
struct proc *p;
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(p);
break;
default:
error = suser_xxx(0, p, PRISON_ROOT);
break;
}
if (error)
return (error);
restart:
bwillwrite();
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
return (error);
vp = nd.ni_vp;
if (vp != NULL) {
vrele(vp);
error = EEXIST;
} else {
VATTR_NULL(&vattr);
vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_fd->fd_cmask;
vattr.va_rdev = SCARG(uap, dev);
whiteout = 0;
switch (SCARG(uap, mode) & S_IFMT) {
case S_IFMT: /* used by badsect to flag bad sectors */
vattr.va_type = VBAD;
break;
case S_IFCHR:
vattr.va_type = VCHR;
break;
case S_IFBLK:
vattr.va_type = VBLK;
break;
case S_IFWHT:
whiteout = 1;
break;
default:
error = EINVAL;
break;
}
}
if (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, p, p->p_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(p, uap)
struct proc *p;
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), p);
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;
vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_fd->fd_cmask;
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
if (error == 0)
vput(nd.ni_vp);
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(p, uap)
struct proc *p;
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), p);
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), p);
if ((error = namei(&nd)) == 0) {
if (nd.ni_vp != NULL) {
vrele(nd.ni_vp);
error = EEXIST;
} else {
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd);
}
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(p, uap)
struct proc *p;
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 = zalloc(namei_zone);
if ((error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, NULL)) != 0)
goto out;
restart:
bwillwrite();
NDINIT(&nd, CREATE, LOCKPARENT|NOOBJ, UIO_USERSPACE, SCARG(uap, link), p);
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);
vattr.va_mode = ACCESSPERMS &~ p->p_fd->fd_cmask;
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, path);
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:
zfree(namei_zone, path);
return (error);
}
/*
* Delete a whiteout from the filesystem.
*/
/* ARGSUSED */
int
undelete(p, uap)
struct proc *p;
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), p);
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, p, p->p_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(p, uap)
struct proc *p;
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), p);
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, p, p->p_ucred, LEASE_WRITE);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
if (!error) {
VOP_LEASE(nd.ni_dvp, p, p->p_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(p, uap)
struct proc *p;
register struct lseek_args /* {
syscallarg(int) fd;
syscallarg(int) pad;
syscallarg(off_t) offset;
syscallarg(int) whence;
} */ *uap;
{
struct ucred *cred = p->p_ucred;
register struct filedesc *fdp = p->p_fd;
register struct file *fp;
struct vattr vattr;
int error;
if ((u_int)SCARG(uap, fd) >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[SCARG(uap, fd)]) == NULL)
return (EBADF);
if (fp->f_type != DTYPE_VNODE)
return (ESPIPE);
switch (SCARG(uap, whence)) {
case L_INCR:
fp->f_offset += SCARG(uap, offset);
break;
case L_XTND:
error=VOP_GETATTR((struct vnode *)fp->f_data, &vattr, cred, p);
if (error)
return (error);
fp->f_offset = SCARG(uap, offset) + vattr.va_size;
break;
case L_SET:
fp->f_offset = SCARG(uap, offset);
break;
default:
return (EINVAL);
}
*(off_t *)(p->p_retval) = fp->f_offset;
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(p, uap)
struct proc *p;
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(p, &nuap);
return (error);
}
#endif /* COMPAT_43 */
/*
* Check access permissions.
*/
#ifndef _SYS_SYSPROTO_H_
struct access_args {
char *path;
int flags;
};
#endif
int
access(p, uap)
struct proc *p;
register struct access_args /* {
syscallarg(char *) path;
syscallarg(int) flags;
} */ *uap;
{
struct ucred *cred, *tmpcred;
register struct vnode *vp;
int error, flags;
struct nameidata nd;
cred = p->p_ucred;
/*
* 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.
*/
tmpcred = crdup(cred);
tmpcred->cr_uid = cred->cr_ruid;
tmpcred->cr_groups[0] = cred->cr_rgid;
p->p_ucred = tmpcred;
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
goto out1;
vp = nd.ni_vp;
/* Flags == 0 means only check for existence. */
if (SCARG(uap, flags)) {
flags = 0;
if (SCARG(uap, flags) & R_OK)
flags |= VREAD;
if (SCARG(uap, flags) & W_OK)
flags |= VWRITE;
if (SCARG(uap, flags) & X_OK)
flags |= VEXEC;
if ((flags & VWRITE) == 0 || (error = vn_writechk(vp)) == 0)
error = VOP_ACCESS(vp, flags, tmpcred, p);
}
NDFREE(&nd, NDF_ONLY_PNBUF);
vput(vp);
out1:
p->p_ucred = cred;
crfree(tmpcred);
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(p, uap)
struct proc *p;
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), p);
if ((error = namei(&nd)) != 0)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);
error = vn_stat(nd.ni_vp, &sb, p);
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(p, uap)
struct proc *p;
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), p);
if ((error = namei(&nd)) != 0)
return (error);
vp = nd.ni_vp;
error = vn_stat(vp, &sb, p);
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(p, uap)
struct proc *p;
register struct stat_args /* {
syscallarg(char *) path;
syscallarg(struct stat *) ub;
} */ *uap;
{
struct stat sb;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
return (error);
error = vn_stat(nd.ni_vp, &sb, p);
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(p, uap)
struct proc *p;
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), p);
if ((error = namei(&nd)) != 0)
return (error);
vp = nd.ni_vp;
error = vn_stat(vp, &sb, p);
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_qspare[0] = sb->st_qspare[0];
nsb->st_qspare[1] = sb->st_qspare[1];
}
#ifndef _SYS_SYSPROTO_H_
struct nstat_args {
char *path;
struct nstat *ub;
};
#endif
/* ARGSUSED */
int
nstat(p, uap)
struct proc *p;
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), p);
if ((error = namei(&nd)) != 0)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);
error = vn_stat(nd.ni_vp, &sb, p);
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(p, uap)
struct proc *p;
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), p);
if ((error = namei(&nd)) != 0)
return (error);
vp = nd.ni_vp;
NDFREE(&nd, NDF_ONLY_PNBUF);
error = vn_stat(vp, &sb, p);
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(p, uap)
struct proc *p;
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), p);
if ((error = namei(&nd)) != 0)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);
error = VOP_PATHCONF(nd.ni_vp, SCARG(uap, name), p->p_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(p, uap)
struct proc *p;
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), p);
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_procp = p;
auio.uio_resid = SCARG(uap, count);
error = VOP_READLINK(vp, &auio, p->p_ucred);
}
vput(vp);
p->p_retval[0] = SCARG(uap, count) - auio.uio_resid;
return (error);
}
/*
* Common implementation code for chflags() and fchflags().
*/
static int
setfflags(p, vp, flags)
struct proc *p;
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_xxx(p->p_ucred, p, PRISON_ROOT)) != 0))
return (error);
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
return (error);
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
VATTR_NULL(&vattr);
vattr.va_flags = flags;
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
VOP_UNLOCK(vp, 0, p);
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(p, uap)
struct proc *p;
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), p);
if ((error = namei(&nd)) != 0)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);
error = setfflags(p, 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(p, uap)
struct proc *p;
register struct fchflags_args /* {
syscallarg(int) fd;
syscallarg(int) flags;
} */ *uap;
{
struct file *fp;
int error;
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
return (error);
return setfflags(p, (struct vnode *) fp->f_data, SCARG(uap, flags));
}
/*
* Common implementation code for chmod(), lchmod() and fchmod().
*/
static int
setfmode(p, vp, mode)
struct proc *p;
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, p, p->p_ucred, LEASE_WRITE);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
VATTR_NULL(&vattr);
vattr.va_mode = mode & ALLPERMS;
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
VOP_UNLOCK(vp, 0, p);
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(p, uap)
struct proc *p;
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), p);
if ((error = namei(&nd)) != 0)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);
error = setfmode(p, 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(p, uap)
struct proc *p;
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), p);
if ((error = namei(&nd)) != 0)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);
error = setfmode(p, 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(p, uap)
struct proc *p;
register struct fchmod_args /* {
syscallarg(int) fd;
syscallarg(int) mode;
} */ *uap;
{
struct file *fp;
int error;
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
return (error);
return setfmode(p, (struct vnode *)fp->f_data, SCARG(uap, mode));
}
/*
* Common implementation for chown(), lchown(), and fchown()
*/
static int
setfown(p, vp, uid, gid)
struct proc *p;
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, p, p->p_ucred, LEASE_WRITE);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
VATTR_NULL(&vattr);
vattr.va_uid = uid;
vattr.va_gid = gid;
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
VOP_UNLOCK(vp, 0, p);
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(p, uap)
struct proc *p;
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), p);
if ((error = namei(&nd)) != 0)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);
error = setfown(p, 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(p, uap)
struct proc *p;
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), p);
if ((error = namei(&nd)) != 0)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);
error = setfown(p, 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(p, uap)
struct proc *p;
register struct fchown_args /* {
syscallarg(int) fd;
syscallarg(int) uid;
syscallarg(int) gid;
} */ *uap;
{
struct file *fp;
int error;
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
return (error);
return setfown(p, (struct vnode *)fp->f_data,
SCARG(uap, uid), SCARG(uap, gid));
}
/*
* 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(p, vp, ts, nullflag)
struct proc *p;
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, p, p->p_ucred, LEASE_WRITE);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
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, p->p_ucred, p);
VOP_UNLOCK(vp, 0, p);
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(p, uap)
struct proc *p;
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), p);
if ((error = namei(&nd)) != 0)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);
error = setutimes(p, 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(p, uap)
struct proc *p;
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), p);
if ((error = namei(&nd)) != 0)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);
error = setutimes(p, 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(p, uap)
struct proc *p;
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(p->p_fd, SCARG(uap, fd), &fp)) != 0)
return (error);
return setutimes(p, (struct vnode *)fp->f_data, ts, usrtvp == NULL);
}
/*
* 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(p, uap)
struct proc *p;
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), p);
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, p, p->p_ucred, LEASE_WRITE);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
if (vp->v_type == VDIR)
error = EISDIR;
else if ((error = vn_writechk(vp)) == 0 &&
(error = VOP_ACCESS(vp, VWRITE, p->p_ucred, p)) == 0) {
VATTR_NULL(&vattr);
vattr.va_size = SCARG(uap, length);
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
}
vput(vp);
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(p, uap)
struct proc *p;
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(p->p_fd, SCARG(uap, fd), &fp)) != 0)
return (error);
if ((fp->f_flag & FWRITE) == 0)
return (EINVAL);
vp = (struct vnode *)fp->f_data;
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
return (error);
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
if (vp->v_type == VDIR)
error = EISDIR;
else if ((error = vn_writechk(vp)) == 0) {
VATTR_NULL(&vattr);
vattr.va_size = SCARG(uap, length);
error = VOP_SETATTR(vp, &vattr, fp->f_cred, p);
}
VOP_UNLOCK(vp, 0, p);
vn_finished_write(mp);
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(p, uap)
struct proc *p;
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(p, &nuap));
}
/*
* Truncate a file given a file descriptor.
*/
#ifndef _SYS_SYSPROTO_H_
struct oftruncate_args {
int fd;
long length;
};
#endif
/* ARGSUSED */
int
oftruncate(p, uap)
struct proc *p;
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(p, &nuap));
}
#endif /* COMPAT_43 || COMPAT_SUNOS */
/*
* Sync an open file.
*/
#ifndef _SYS_SYSPROTO_H_
struct fsync_args {
int fd;
};
#endif
/* ARGSUSED */
int
fsync(p, uap)
struct proc *p;
struct fsync_args /* {
syscallarg(int) fd;
} */ *uap;
{
struct vnode *vp;
struct mount *mp;
struct file *fp;
vm_object_t obj;
int error;
if ((error = getvnode(p->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)
return (error);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
if (VOP_GETVOBJECT(vp, &obj) == 0) {
mtx_lock(&vm_mtx);
vm_object_page_clean(obj, 0, 0, 0);
mtx_unlock(&vm_mtx);
}
error = VOP_FSYNC(vp, fp->f_cred, MNT_WAIT, p);
#ifdef SOFTUPDATES
if (error == 0 && vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP))
error = softdep_fsync(vp);
#endif
VOP_UNLOCK(vp, 0, p);
vn_finished_write(mp);
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(p, uap)
struct proc *p;
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), p);
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), p);
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, p, p->p_ucred, LEASE_WRITE);
if (fromnd.ni_dvp != tdvp) {
VOP_LEASE(fromnd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
}
if (tvp) {
VOP_LEASE(tvp, p, p->p_ucred, LEASE_WRITE);
}
error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd,
tond.ni_dvp, tond.ni_vp, &tond.ni_cnd);
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(p, uap)
struct proc *p;
register struct mkdir_args /* {
syscallarg(char *) path;
syscallarg(int) mode;
} */ *uap;
{
struct mount *mp;
struct vnode *vp;
struct vattr vattr;
int error;
struct nameidata nd;
restart:
bwillwrite();
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
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;
vattr.va_mode = (SCARG(uap, mode) & ACCESSPERMS) &~ p->p_fd->fd_cmask;
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
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(p, uap)
struct proc *p;
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), p);
if ((error = namei(&nd)) != 0)
return (error);
vp = nd.ni_vp;
if (vp->v_type != VDIR) {
error = ENOTDIR;
goto out;
}
/*
* No rmdir "." please.
*/
if (nd.ni_dvp == vp) {
error = EINVAL;
goto out;
}
/*
* The root of a mounted filesystem cannot be deleted.
*/
if (vp->v_flag & VROOT) {
error = EBUSY;
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, p, p->p_ucred, LEASE_WRITE);
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
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 file system independent format.
*/
#ifndef _SYS_SYSPROTO_H_
struct ogetdirentries_args {
int fd;
char *buf;
u_int count;
long *basep;
};
#endif
int
ogetdirentries(p, uap)
struct proc *p;
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;
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
return (error);
if ((fp->f_flag & FREAD) == 0)
return (EBADF);
vp = (struct vnode *)fp->f_data;
unionread:
if (vp->v_type != VDIR)
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_procp = p;
auio.uio_resid = SCARG(uap, count);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
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, p);
if (error)
return (error);
if (SCARG(uap, count) == auio.uio_resid) {
if (union_dircheckp) {
error = union_dircheckp(p, &vp, fp);
if (error == -1)
goto unionread;
if (error)
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));
p->p_retval[0] = SCARG(uap, count) - auio.uio_resid;
return (error);
}
#endif /* COMPAT_43 */
/*
* Read a block of directory entries in a file system independent format.
*/
#ifndef _SYS_SYSPROTO_H_
struct getdirentries_args {
int fd;
char *buf;
u_int count;
long *basep;
};
#endif
int
getdirentries(p, uap)
struct proc *p;
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(p->p_fd, SCARG(uap, fd), &fp)) != 0)
return (error);
if ((fp->f_flag & FREAD) == 0)
return (EBADF);
vp = (struct vnode *)fp->f_data;
unionread:
if (vp->v_type != VDIR)
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_procp = p;
auio.uio_resid = SCARG(uap, count);
/* vn_lock(vp, LK_SHARED | LK_RETRY, p); */
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
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, p);
if (error)
return (error);
if (SCARG(uap, count) == auio.uio_resid) {
if (union_dircheckp) {
error = union_dircheckp(p, &vp, fp);
if (error == -1)
goto unionread;
if (error)
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));
}
p->p_retval[0] = SCARG(uap, count) - auio.uio_resid;
return (error);
}
#ifndef _SYS_SYSPROTO_H_
struct getdents_args {
int fd;
char *buf;
size_t count;
};
#endif
int
getdents(p, uap)
struct proc *p;
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(p, &ap);
}
/*
* Set the mode mask for creation of filesystem nodes.
*
* MP SAFE
*/
#ifndef _SYS_SYSPROTO_H_
struct umask_args {
int newmask;
};
#endif
int
umask(p, uap)
struct proc *p;
struct umask_args /* {
syscallarg(int) newmask;
} */ *uap;
{
register struct filedesc *fdp;
fdp = p->p_fd;
p->p_retval[0] = fdp->fd_cmask;
fdp->fd_cmask = SCARG(uap, newmask) & ALLPERMS;
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(p, uap)
struct proc *p;
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, UIO_USERSPACE, SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
return (error);
vp = nd.ni_vp;
NDFREE(&nd, NDF_ONLY_PNBUF);
if (vp->v_type != VCHR) {
error = EINVAL;
goto out;
}
if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0)
goto out;
if (p->p_ucred->cr_uid != vattr.va_uid &&
(error = suser_xxx(0, p, PRISON_ROOT)))
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.
*/
int
getvnode(fdp, fd, fpp)
struct filedesc *fdp;
int fd;
struct file **fpp;
{
struct file *fp;
if ((u_int)fd >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[fd]) == NULL)
return (EBADF);
if (fp->f_type != DTYPE_VNODE && fp->f_type != DTYPE_FIFO)
return (EINVAL);
*fpp = fp;
return (0);
}
/*
* Get (NFS) file handle
*/
#ifndef _SYS_SYSPROTO_H_
struct getfh_args {
char *fname;
fhandle_t *fhp;
};
#endif
int
getfh(p, uap)
struct proc *p;
register struct getfh_args *uap;
{
struct nameidata nd;
fhandle_t fh;
register struct vnode *vp;
int error;
/*
* Must be super user
*/
error = suser(p);
if (error)
return (error);
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, p);
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(p, uap)
struct proc *p;
struct fhopen_args /* {
syscallarg(const struct fhandle *) u_fhp;
syscallarg(int) flags;
} */ *uap;
{
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(p);
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, p->p_ucred, p);
if (error)
goto bad;
}
if (fmode & O_TRUNC) {
VOP_UNLOCK(vp, 0, p); /* XXX */
if ((error = vn_start_write(NULL, &mp, V_WAIT | PCATCH)) != 0) {
vrele(vp);
return (error);
}
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p); /* XXX */
VATTR_NULL(vap);
vap->va_size = 0;
error = VOP_SETATTR(vp, vap, p->p_ucred, p);
vn_finished_write(mp);
if (error)
goto bad;
}
error = VOP_OPEN(vp, fmode, p->p_ucred, p);
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, p, p->p_ucred)) != 0)
goto bad;
}
if (fmode & FWRITE)
vp->v_writecount++;
/*
* end of vn_open code
*/
if ((error = falloc(p, &nfp, &indx)) != 0)
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, p);
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.
*/
if (fdp->fd_ofiles[indx] == fp) {
fdp->fd_ofiles[indx] = NULL;
fdrop(fp, p);
}
/*
* release our private reference
*/
fdrop(fp, p);
return(error);
}
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
fp->f_flag |= FHASLOCK;
}
if ((vp->v_type == VREG) && (VOP_GETVOBJECT(vp, NULL) != 0))
vfs_object_create(vp, p, p->p_ucred);
VOP_UNLOCK(vp, 0, p);
fdrop(fp, p);
p->p_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(p, uap)
struct proc *p;
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(p);
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, p);
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(p, uap)
struct proc *p;
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
*/
if ((error = suser(p)))
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, p)) != 0)
return (error);
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
if (suser_xxx(p->p_ucred, 0, 0)) {
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(p, uap)
struct proc *p;
struct extattrctl_args *uap;
{
struct vnode *filename_vp;
struct nameidata nd;
struct mount *mp;
char attrname[EXTATTR_MAXNAMELEN];
int error;
/*
* SCARG(uap, attrname) not always defined. We check again later
* when we invoke the VFS call so as to pass in NULL there if needed.
*/
if (SCARG(uap, attrname) != NULL) {
error = copyinstr(SCARG(uap, attrname), attrname,
EXTATTR_MAXNAMELEN, NULL);
if (error)
return (error);
}
/*
* SCARG(uap, filename) not always defined. If it is, grab
* a vnode lock, which VFS_EXTATTRCTL() will later release.
*/
filename_vp = NULL;
if (SCARG(uap, filename) != NULL) {
NDINIT(&nd, LOOKUP | LOCKLEAF, FOLLOW, UIO_USERSPACE,
SCARG(uap, filename), p);
if ((error = namei(&nd)) != 0)
return (error);
filename_vp = nd.ni_vp;
NDFREE(&nd, NDF_NO_VP_RELE | NDF_NO_VP_UNLOCK);
}
/* SCARG(uap, path) always defined. */
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
return (error);
error = vn_start_write(nd.ni_vp, &mp, V_WAIT | PCATCH);
NDFREE(&nd, 0);
if (error) {
if (filename_vp)
vrele(filename_vp);
return (error);
}
if (SCARG(uap, attrname) != NULL) {
error = VFS_EXTATTRCTL(mp, SCARG(uap, cmd), filename_vp,
SCARG(uap, attrnamespace), attrname, p);
} else {
error = VFS_EXTATTRCTL(mp, SCARG(uap, cmd), filename_vp,
SCARG(uap, attrnamespace), NULL, p);
}
vn_finished_write(mp);
/*
* 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);
}
/*
* extattr_set_vp(): Set a named extended attribute on a file or directory
*
* Arguments: unlocked vnode "vp", attribute namespace "attrnamespace",
* kernelspace string pointer "attrname",
* userspace iovec array pointer "iovp", unsigned int iovcnt
* 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_set_vp(struct vnode *vp, int attrnamespace, const char *attrname,
struct iovec *iovp, unsigned iovcnt, struct proc *p)
{
struct mount *mp;
struct uio auio;
struct iovec *iov, *needfree = NULL, aiov[UIO_SMALLIOV];
u_int iovlen, cnt;
int error, i;
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
return (error);
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
iovlen = iovcnt * sizeof(struct iovec);
if (iovcnt > UIO_SMALLIOV) {
if (iovcnt > UIO_MAXIOV) {
error = EINVAL;
goto done;
}
MALLOC(iov, struct iovec *, iovlen, M_IOV, M_WAITOK);
needfree = iov;
} else
iov = aiov;
auio.uio_iov = iov;
auio.uio_iovcnt = iovcnt;
auio.uio_rw = UIO_WRITE;
auio.uio_segflg = UIO_USERSPACE;
auio.uio_procp = p;
auio.uio_offset = 0;
if ((error = copyin((caddr_t)iovp, (caddr_t)iov, iovlen)))
goto done;
auio.uio_resid = 0;
for (i = 0; i < iovcnt; i++) {
if (iov->iov_len > INT_MAX - auio.uio_resid) {
error = EINVAL;
goto done;
}
auio.uio_resid += iov->iov_len;
iov++;
}
cnt = auio.uio_resid;
error = VOP_SETEXTATTR(vp, attrnamespace, attrname, &auio,
p->p_ucred, p);
cnt -= auio.uio_resid;
p->p_retval[0] = cnt;
done:
if (needfree)
FREE(needfree, M_IOV);
VOP_UNLOCK(vp, 0, p);
vn_finished_write(mp);
return (error);
}
int
extattr_set_file(p, uap)
struct proc *p;
struct extattr_set_file_args *uap;
{
struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN,
NULL);
if (error)
return (error);
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);
error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname,
SCARG(uap, iovp), SCARG(uap, iovcnt), p);
vrele(nd.ni_vp);
return (error);
}
int
extattr_set_fd(p, uap)
struct proc *p;
struct extattr_set_fd_args *uap;
{
struct file *fp;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN,
NULL);
if (error)
return (error);
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
return (error);
error = extattr_set_vp((struct vnode *)fp->f_data,
SCARG(uap, attrnamespace), attrname, SCARG(uap, iovp),
SCARG(uap, iovcnt), p);
return (error);
}
/*
* extattr_get_vp(): Get a named extended attribute on a file or directory
*
* Arguments: unlocked vnode "vp", attribute namespace "attrnamespace",
* kernelspace string pointer "attrname",
* userspace iovec array pointer "iovp", unsigned int iovcnt,
* 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_get_vp(struct vnode *vp, int attrnamespace, const char *attrname,
struct iovec *iovp, unsigned iovcnt, struct proc *p)
{
struct uio auio;
struct iovec *iov, *needfree = NULL, aiov[UIO_SMALLIOV];
u_int iovlen, cnt;
int error, i;
VOP_LEASE(vp, p, p->p_ucred, LEASE_READ);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
iovlen = iovcnt * sizeof (struct iovec);
if (iovcnt > UIO_SMALLIOV) {
if (iovcnt > UIO_MAXIOV) {
error = EINVAL;
goto done;
}
MALLOC(iov, struct iovec *, iovlen, M_IOV, M_WAITOK);
needfree = iov;
} else
iov = aiov;
auio.uio_iov = iov;
auio.uio_iovcnt = iovcnt;
auio.uio_rw = UIO_READ;
auio.uio_segflg = UIO_USERSPACE;
auio.uio_procp = p;
auio.uio_offset = 0;
if ((error = copyin((caddr_t)iovp, (caddr_t)iov, iovlen)))
goto done;
auio.uio_resid = 0;
for (i = 0; i < iovcnt; i++) {
if (iov->iov_len > INT_MAX - auio.uio_resid) {
error = EINVAL;
goto done;
}
auio.uio_resid += iov->iov_len;
iov++;
}
cnt = auio.uio_resid;
error = VOP_GETEXTATTR(vp, attrnamespace, attrname, &auio,
p->p_ucred, p);
cnt -= auio.uio_resid;
p->p_retval[0] = cnt;
done:
if (needfree)
FREE(needfree, M_IOV);
VOP_UNLOCK(vp, 0, p);
return (error);
}
int
extattr_get_file(p, uap)
struct proc *p;
struct extattr_get_file_args *uap;
{
struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN,
NULL);
if (error)
return (error);
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);
error = extattr_get_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname,
SCARG(uap, iovp), SCARG(uap, iovcnt), p);
vrele(nd.ni_vp);
return (error);
}
int
extattr_get_fd(p, uap)
struct proc *p;
struct extattr_get_fd_args *uap;
{
struct file *fp;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN,
NULL);
if (error)
return (error);
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
return (error);
error = extattr_get_vp((struct vnode *)fp->f_data,
SCARG(uap, attrnamespace), attrname, SCARG(uap, iovp),
SCARG(uap, iovcnt), p);
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 proc *p)
{
struct mount *mp;
int error;
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
return (error);
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
error = VOP_SETEXTATTR(vp, attrnamespace, attrname, NULL,
p->p_ucred, p);
VOP_UNLOCK(vp, 0, p);
vn_finished_write(mp);
return (error);
}
int
extattr_delete_file(p, uap)
struct proc *p;
struct extattr_delete_file_args *uap;
{
struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN,
NULL);
if (error)
return(error);
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
return(error);
NDFREE(&nd, NDF_ONLY_PNBUF);
error = extattr_delete_vp(nd.ni_vp, SCARG(uap, attrnamespace),
attrname, p);
vrele(nd.ni_vp);
return(error);
}
int
extattr_delete_fd(p, uap)
struct proc *p;
struct extattr_delete_fd_args *uap;
{
struct file *fp;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN,
NULL);
if (error)
return (error);
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
return (error);
error = extattr_delete_vp((struct vnode *)fp->f_data,
SCARG(uap, attrnamespace), attrname, p);
return (error);
}
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