freebsd-dev/sys/kern/vfs_syscalls.c

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1994-05-24 10:09:53 +00:00
/*
* 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
* $Id: vfs_syscalls.c,v 1.100 1998/05/07 04:58:23 msmith Exp $
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*/
/* For 4.3 integer FS ID compatibility */
#include "opt_compat.h"
/*
* XXX - The following is required because of some magic done
* in getdirentries() below which is only done if the translucent
* filesystem `UNION' is compiled into the kernel. This is broken,
* but I don't have time to study the code deeply enough to understand
* what's going on and determine an appropriate fix. -GAW
*/
#include "opt_union.h"
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#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sysent.h>
#include <sys/sysproto.h>
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#include <sys/namei.h>
#include <sys/filedesc.h>
#include <sys/kernel.h>
#include <sys/fcntl.h>
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#include <sys/file.h>
#include <sys/stat.h>
#include <sys/unistd.h>
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#include <sys/vnode.h>
#include <sys/malloc.h>
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#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/dirent.h>
#ifdef UNION
#include <miscfs/union/union.h>
#endif
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#include <vm/vm.h>
#include <vm/vm_object.h>
#include <vm/vm_extern.h>
#include <vm/vm_zone.h>
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#include <sys/sysctl.h>
static int change_dir __P((struct nameidata *ndp, struct proc *p));
static void checkdirs __P((struct vnode *olddp));
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 *, struct timeval *, int));
struct proc *p;
struct vnode *vp;
struct timeval *tv;
int nullflag;
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static int usermount = 0; /* if 1, non-root can mount fs. */
SYSCTL_INT(_vfs, OID_AUTO, usermount, CTLFLAG_RW, &usermount, 0, "");
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/*
* Virtual File System System Calls
*/
/*
* Mount a file system.
*/
#ifndef _SYS_SYSPROTO_H_
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struct mount_args {
char *type;
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char *path;
int flags;
caddr_t data;
};
#endif
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/* ARGSUSED */
int
mount(p, uap)
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struct proc *p;
register struct mount_args /* {
syscallarg(char *) type;
syscallarg(char *) path;
syscallarg(int) flags;
syscallarg(caddr_t) data;
} */ *uap;
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{
struct vnode *vp;
struct mount *mp;
struct vfsconf *vfsp;
int error, flag = 0, flag2 = 0;
struct vattr va;
u_long fstypenum;
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struct nameidata nd;
char fstypename[MFSNAMELEN];
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if (usermount == 0 && (error = suser(p->p_ucred, &p->p_acflag)))
return (error);
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/*
* Get vnode to be covered
*/
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
SCARG(uap, path), p);
if (error = namei(&nd))
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return (error);
vp = nd.ni_vp;
if (SCARG(uap, flags) & MNT_UPDATE) {
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if ((vp->v_flag & VROOT) == 0) {
vput(vp);
return (EINVAL);
}
mp = vp->v_mount;
flag = mp->mnt_flag;
flag2 = mp->mnt_kern_flag;
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/*
* We only allow the filesystem to be reloaded if it
* is currently mounted read-only.
*/
if ((SCARG(uap, flags) & MNT_RELOAD) &&
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((mp->mnt_flag & MNT_RDONLY) == 0)) {
vput(vp);
return (EOPNOTSUPP); /* Needs translation */
}
mp->mnt_flag |=
SCARG(uap, flags) & (MNT_RELOAD | MNT_FORCE | MNT_UPDATE);
/*
* Only root, or the user that did the original mount is
* permitted to update it.
*/
if (mp->mnt_stat.f_owner != p->p_ucred->cr_uid &&
(error = suser(p->p_ucred, &p->p_acflag))) {
vput(vp);
return (error);
}
/*
* Do not allow NFS export by non-root users. Silently
* enforce MNT_NOSUID and MNT_NODEV for non-root users.
*/
if (p->p_ucred->cr_uid != 0) {
if (SCARG(uap, flags) & MNT_EXPORTED) {
vput(vp);
return (EPERM);
}
SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;
}
if (vfs_busy(mp, LK_NOWAIT, 0, p)) {
vput(vp);
return (EBUSY);
}
VOP_UNLOCK(vp, 0, p);
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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->p_ucred, &p->p_acflag)))) {
vput(vp);
return (error);
}
/*
* Do not allow NFS export by non-root users. Silently
* enforce MNT_NOSUID and MNT_NODEV for non-root users.
*/
if (p->p_ucred->cr_uid != 0) {
if (SCARG(uap, flags) & MNT_EXPORTED) {
vput(vp);
return (EPERM);
}
SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;
}
if (error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 0))
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return (error);
if (vp->v_type != VDIR) {
vput(vp);
return (ENOTDIR);
}
#ifdef COMPAT_43
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/*
* Historically filesystem types were identified by number. If we
* get an integer for the filesystem type instead of a string, we
* check to see if it matches one of the historic filesystem types.
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*/
fstypenum = (u_long)SCARG(uap, type);
if (fstypenum < maxvfsconf) {
for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
if (vfsp->vfc_typenum == fstypenum)
break;
if (vfsp == NULL) {
vput(vp);
return (ENODEV);
}
strncpy(fstypename, vfsp->vfc_name, MFSNAMELEN);
} else
#endif /* COMPAT_43 */
if (error = copyinstr(SCARG(uap, type), fstypename, MFSNAMELEN, NULL)) {
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vput(vp);
return (error);
}
for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
if (!strcmp(vfsp->vfc_name, fstypename))
break;
if (vfsp == NULL) {
vput(vp);
return (ENODEV);
}
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if (vp->v_mountedhere != NULL) {
vput(vp);
return (EBUSY);
}
/*
* Allocate and initialize the filesystem.
*/
mp = (struct mount *)malloc((u_long)sizeof(struct mount),
M_MOUNT, M_WAITOK);
bzero((char *)mp, (u_long)sizeof(struct mount));
This mega-commit is meant to fix numerous interrelated problems. There has been some bitrot and incorrect assumptions in the vfs_bio code. These problems have manifest themselves worse on NFS type filesystems, but can still affect local filesystems under certain circumstances. Most of the problems have involved mmap consistancy, and as a side-effect broke the vfs.ioopt code. This code might have been committed seperately, but almost everything is interrelated. 1) Allow (pmap_object_init_pt) prefaulting of buffer-busy pages that are fully valid. 2) Rather than deactivating erroneously read initial (header) pages in kern_exec, we now free them. 3) Fix the rundown of non-VMIO buffers that are in an inconsistent (missing vp) state. 4) Fix the disassociation of pages from buffers in brelse. The previous code had rotted and was faulty in a couple of important circumstances. 5) Remove a gratuitious buffer wakeup in vfs_vmio_release. 6) Remove a crufty and currently unused cluster mechanism for VBLK files in vfs_bio_awrite. When the code is functional, I'll add back a cleaner version. 7) The page busy count wakeups assocated with the buffer cache usage were incorrectly cleaned up in a previous commit by me. Revert to the original, correct version, but with a cleaner implementation. 8) The cluster read code now tries to keep data associated with buffers more aggressively (without breaking the heuristics) when it is presumed that the read data (buffers) will be soon needed. 9) Change to filesystem lockmgr locks so that they use LK_NOPAUSE. The delay loop waiting is not useful for filesystem locks, due to the length of the time intervals. 10) Correct and clean-up spec_getpages. 11) Implement a fully functional nfs_getpages, nfs_putpages. 12) Fix nfs_write so that modifications are coherent with the NFS data on the server disk (at least as well as NFS seems to allow.) 13) Properly support MS_INVALIDATE on NFS. 14) Properly pass down MS_INVALIDATE to lower levels of the VM code from vm_map_clean. 15) Better support the notion of pages being busy but valid, so that fewer in-transit waits occur. (use p->busy more for pageouts instead of PG_BUSY.) Since the page is fully valid, it is still usable for reads. 16) It is possible (in error) for cached pages to be busy. Make the page allocation code handle that case correctly. (It should probably be a printf or panic, but I want the system to handle coding errors robustly. I'll probably add a printf.) 17) Correct the design and usage of vm_page_sleep. It didn't handle consistancy problems very well, so make the design a little less lofty. After vm_page_sleep, if it ever blocked, it is still important to relookup the page (if the object generation count changed), and verify it's status (always.) 18) In vm_pageout.c, vm_pageout_clean had rotted, so clean that up. 19) Push the page busy for writes and VM_PROT_READ into vm_pageout_flush. 20) Fix vm_pager_put_pages and it's descendents to support an int flag instead of a boolean, so that we can pass down the invalidate bit.
1998-03-07 21:37:31 +00:00
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, vfsp->vfc_name, MFSNAMELEN);
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vp->v_mountedhere = mp;
mp->mnt_vnodecovered = vp;
mp->mnt_stat.f_owner = p->p_ucred->cr_uid;
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update:
/*
* Set the mount level flags.
*/
if (SCARG(uap, flags) & MNT_RDONLY)
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mp->mnt_flag |= MNT_RDONLY;
else if (mp->mnt_flag & MNT_RDONLY)
mp->mnt_kern_flag |= MNTK_WANTRDWR;
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mp->mnt_flag &=~ (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |
MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOATIME |
MNT_NOSYMFOLLOW |
MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR);
mp->mnt_flag |= SCARG(uap, flags) & (MNT_NOSUID | MNT_NOEXEC |
MNT_NODEV | MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_FORCE |
MNT_NOSYMFOLLOW |
MNT_NOATIME | MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR);
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/*
* Mount the filesystem.
*/
error = VFS_MOUNT(mp, SCARG(uap, path), SCARG(uap, data), &nd, p);
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if (mp->mnt_flag & MNT_UPDATE) {
vrele(vp);
if (mp->mnt_kern_flag & MNTK_WANTRDWR)
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mp->mnt_flag &= ~MNT_RDONLY;
mp->mnt_flag &=~ (MNT_UPDATE | MNT_RELOAD | MNT_FORCE);
mp->mnt_kern_flag &=~ MNTK_WANTRDWR;
if (error) {
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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);
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return (error);
}
/*
* Put the new filesystem on the mount list after root.
*/
cache_purge(vp);
if (!error) {
simple_lock(&mountlist_slock);
CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
simple_unlock(&mountlist_slock);
checkdirs(vp);
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))
vrele(vp);
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} else {
mp->mnt_vnodecovered->v_mountedhere = (struct mount *)0;
mp->mnt_vfc->vfc_refcount--;
vfs_unbusy(mp, p);
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free((caddr_t)mp, M_MOUNT);
vput(vp);
}
return (error);
}
/*
* Scan all active processes to see if any of them have a current
* or root directory onto which the new filesystem has just been
* mounted. If so, replace them with the new mount point.
*/
static void
checkdirs(olddp)
struct vnode *olddp;
{
struct filedesc *fdp;
struct vnode *newdp;
struct proc *p;
if (olddp->v_usecount == 1)
return;
if (VFS_ROOT(olddp->v_mountedhere, &newdp))
panic("mount: lost mount");
for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
fdp = p->p_fd;
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;
}
}
if (rootvnode == olddp) {
vrele(rootvnode);
VREF(newdp);
rootvnode = newdp;
}
vput(newdp);
}
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/*
* 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_
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struct unmount_args {
char *path;
int flags;
};
#endif
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/* ARGSUSED */
int
unmount(p, uap)
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struct proc *p;
register struct unmount_args /* {
syscallarg(char *) path;
syscallarg(int) flags;
} */ *uap;
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{
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))
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return (error);
vp = nd.ni_vp;
mp = vp->v_mount;
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/*
* Only root, or the user that did the original mount is
* permitted to unmount this filesystem.
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*/
if ((mp->mnt_stat.f_owner != p->p_ucred->cr_uid) &&
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(error = suser(p->p_ucred, &p->p_acflag))) {
vput(vp);
return (error);
}
/*
* Don't allow unmounting the root file system.
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*/
if (mp->mnt_flag & MNT_ROOTFS) {
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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));
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}
/*
* Do the actual file system unmount.
*/
int
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dounmount(mp, flags, p)
register struct mount *mp;
int flags;
struct proc *p;
{
struct vnode *coveredvp;
int error;
simple_lock(&mountlist_slock);
mp->mnt_kern_flag |= MNTK_UNMOUNT;
lockmgr(&mp->mnt_lock, LK_DRAIN | LK_INTERLOCK, &mountlist_slock, p);
if (mp->mnt_flag & MNT_EXPUBLIC)
vfs_setpublicfs(NULL, NULL, NULL);
vfs_msync(mp, MNT_WAIT);
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mp->mnt_flag &=~ MNT_ASYNC;
cache_purgevfs(mp); /* remove cache entries for this file sys */
if (mp->mnt_syncer != NULL)
vrele(mp->mnt_syncer);
if (((mp->mnt_flag & MNT_RDONLY) ||
(error = VFS_SYNC(mp, MNT_WAIT, p->p_ucred, p)) == 0) ||
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(flags & MNT_FORCE))
error = VFS_UNMOUNT(mp, flags, p);
simple_lock(&mountlist_slock);
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if (error) {
if ((mp->mnt_flag & MNT_RDONLY) == 0 && mp->mnt_syncer == NULL)
(void) vfs_allocate_syncvnode(mp);
mp->mnt_kern_flag &= ~MNTK_UNMOUNT;
lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK | LK_REENABLE,
&mountlist_slock, p);
return (error);
}
CIRCLEQ_REMOVE(&mountlist, mp, mnt_list);
if ((coveredvp = mp->mnt_vnodecovered) != NULLVP) {
coveredvp->v_mountedhere = (struct mount *)0;
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vrele(coveredvp);
}
mp->mnt_vfc->vfc_refcount--;
if (mp->mnt_vnodelist.lh_first != NULL)
panic("unmount: dangling vnode");
lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK, &mountlist_slock, p);
if (mp->mnt_kern_flag & MNTK_MWAIT)
wakeup((caddr_t)mp);
free((caddr_t)mp, M_MOUNT);
return (0);
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}
/*
* 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
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/* ARGSUSED */
int
sync(p, uap)
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struct proc *p;
struct sync_args *uap;
{
register struct mount *mp, *nmp;
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int asyncflag;
simple_lock(&mountlist_slock);
for (mp = mountlist.cqh_first; mp != (void *)&mountlist; mp = nmp) {
if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock, p)) {
nmp = mp->mnt_list.cqe_next;
continue;
}
if ((mp->mnt_flag & MNT_RDONLY) == 0) {
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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;
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}
simple_lock(&mountlist_slock);
nmp = mp->mnt_list.cqe_next;
vfs_unbusy(mp, p);
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}
simple_unlock(&mountlist_slock);
#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
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return (0);
}
/*
* Change filesystem quotas.
*/
#ifndef _SYS_SYSPROTO_H_
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struct quotactl_args {
char *path;
int cmd;
int uid;
caddr_t arg;
};
#endif
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/* ARGSUSED */
int
quotactl(p, uap)
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struct proc *p;
register struct quotactl_args /* {
syscallarg(char *) path;
syscallarg(int) cmd;
syscallarg(int) uid;
syscallarg(caddr_t) arg;
} */ *uap;
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{
register struct mount *mp;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
if (error = namei(&nd))
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return (error);
mp = nd.ni_vp->v_mount;
vrele(nd.ni_vp);
return (VFS_QUOTACTL(mp, SCARG(uap, cmd), SCARG(uap, uid),
SCARG(uap, arg), p));
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}
/*
* Get filesystem statistics.
*/
#ifndef _SYS_SYSPROTO_H_
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struct statfs_args {
char *path;
struct statfs *buf;
};
#endif
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/* ARGSUSED */
int
statfs(p, uap)
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struct proc *p;
register struct statfs_args /* {
syscallarg(char *) path;
syscallarg(struct statfs *) buf;
} */ *uap;
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{
register struct mount *mp;
register struct statfs *sp;
int error;
struct nameidata nd;
struct statfs sb;
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NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
if (error = namei(&nd))
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return (error);
mp = nd.ni_vp->v_mount;
sp = &mp->mnt_stat;
vrele(nd.ni_vp);
error = VFS_STATFS(mp, sp, p);
if (error)
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return (error);
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
if (p->p_ucred->cr_uid != 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)));
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}
/*
* Get filesystem statistics.
*/
#ifndef _SYS_SYSPROTO_H_
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struct fstatfs_args {
int fd;
struct statfs *buf;
};
#endif
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/* ARGSUSED */
int
fstatfs(p, uap)
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struct proc *p;
register struct fstatfs_args /* {
syscallarg(int) fd;
syscallarg(struct statfs *) buf;
} */ *uap;
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{
struct file *fp;
struct mount *mp;
register struct statfs *sp;
int error;
struct statfs sb;
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if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
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return (error);
mp = ((struct vnode *)fp->f_data)->v_mount;
sp = &mp->mnt_stat;
error = VFS_STATFS(mp, sp, p);
if (error)
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return (error);
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
if (p->p_ucred->cr_uid != 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)));
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}
/*
* Get statistics on all filesystems.
*/
#ifndef _SYS_SYSPROTO_H_
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struct getfsstat_args {
struct statfs *buf;
long bufsize;
int flags;
};
#endif
int
getfsstat(p, uap)
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struct proc *p;
register struct getfsstat_args /* {
syscallarg(struct statfs *) buf;
syscallarg(long) bufsize;
syscallarg(int) flags;
} */ *uap;
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{
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;
simple_lock(&mountlist_slock);
for (mp = mountlist.cqh_first; mp != (void *)&mountlist; mp = nmp) {
if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock, p)) {
nmp = mp->mnt_list.cqe_next;
continue;
}
if (sfsp && count < maxcount) {
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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.
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*/
if (((SCARG(uap, flags) & (MNT_LAZY|MNT_NOWAIT)) == 0 ||
(SCARG(uap, flags) & MNT_WAIT)) &&
(error = VFS_STATFS(mp, sp, p))) {
simple_lock(&mountlist_slock);
nmp = mp->mnt_list.cqe_next;
vfs_unbusy(mp, p);
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continue;
}
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sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
error = copyout((caddr_t)sp, sfsp, sizeof(*sp));
if (error) {
vfs_unbusy(mp, p);
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return (error);
}
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sfsp += sizeof(*sp);
}
count++;
simple_lock(&mountlist_slock);
nmp = mp->mnt_list.cqe_next;
vfs_unbusy(mp, p);
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}
simple_unlock(&mountlist_slock);
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if (sfsp && count > maxcount)
p->p_retval[0] = maxcount;
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else
p->p_retval[0] = count;
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return (0);
}
/*
* Change current working directory to a given file descriptor.
*/
#ifndef _SYS_SYSPROTO_H_
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struct fchdir_args {
int fd;
};
#endif
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/* ARGSUSED */
int
fchdir(p, uap)
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struct proc *p;
struct fchdir_args /* {
syscallarg(int) fd;
} */ *uap;
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{
register struct filedesc *fdp = p->p_fd;
struct vnode *vp, *tdp;
struct mount *mp;
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struct file *fp;
int error;
if (error = getvnode(fdp, SCARG(uap, fd), &fp))
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return (error);
vp = (struct vnode *)fp->f_data;
VREF(vp);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
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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);
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return (error);
}
VOP_UNLOCK(vp, 0, p);
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vrele(fdp->fd_cdir);
fdp->fd_cdir = vp;
return (0);
}
/*
* Change current working directory (``.'').
*/
#ifndef _SYS_SYSPROTO_H_
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struct chdir_args {
char *path;
};
#endif
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/* ARGSUSED */
int
chdir(p, uap)
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struct proc *p;
struct chdir_args /* {
syscallarg(char *) path;
} */ *uap;
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{
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))
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return (error);
vrele(fdp->fd_cdir);
fdp->fd_cdir = nd.ni_vp;
return (0);
}
/*
* Change notion of root (``/'') directory.
*/
#ifndef _SYS_SYSPROTO_H_
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struct chroot_args {
char *path;
};
#endif
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/* ARGSUSED */
int
chroot(p, uap)
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struct proc *p;
struct chroot_args /* {
syscallarg(char *) path;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
register struct filedesc *fdp = p->p_fd;
int error;
struct nameidata nd;
error = suser(p->p_ucred, &p->p_acflag);
if (error)
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return (error);
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
SCARG(uap, path), p);
if (error = change_dir(&nd, p))
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return (error);
vrele(fdp->fd_rdir);
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fdp->fd_rdir = nd.ni_vp;
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)
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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);
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return (error);
}
/*
* Check permissions, allocate an open file structure,
* and call the device open routine if any.
*/
#ifndef _SYS_SYSPROTO_H_
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struct open_args {
char *path;
int flags;
int mode;
};
#endif
int
open(p, uap)
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struct proc *p;
register struct open_args /* {
syscallarg(char *) path;
syscallarg(int) flags;
syscallarg(int) mode;
} */ *uap;
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{
register struct filedesc *fdp = p->p_fd;
register struct file *fp;
register struct vnode *vp;
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int cmode, flags, oflags;
1994-05-24 10:09:53 +00:00
struct file *nfp;
int type, indx, error;
struct flock lf;
struct nameidata nd;
1997-10-28 10:29:55 +00:00
oflags = SCARG(uap, flags);
if ((oflags & O_ACCMODE) == O_ACCMODE)
return (EINVAL);
1997-10-28 10:29:55 +00:00
flags = FFLAGS(oflags);
error = falloc(p, &nfp, &indx);
if (error)
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return (error);
fp = nfp;
cmode = ((SCARG(uap, mode) &~ fdp->fd_cmask) & ALLPERMS) &~ S_ISTXT;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
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p->p_dupfd = -indx - 1; /* XXX check for fdopen */
error = vn_open(&nd, flags, cmode);
if (error) {
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ffree(fp);
if ((error == ENODEV || error == ENXIO) &&
p->p_dupfd >= 0 && /* XXX from fdopen */
1994-05-24 10:09:53 +00:00
(error =
dupfdopen(fdp, indx, p->p_dupfd, flags, error)) == 0) {
p->p_retval[0] = indx;
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return (0);
}
if (error == ERESTART)
error = EINTR;
fdp->fd_ofiles[indx] = NULL;
return (error);
}
p->p_dupfd = 0;
vp = nd.ni_vp;
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fp->f_flag = flags & FMASK;
fp->f_type = (vp->v_type == VFIFO ? DTYPE_FIFO : DTYPE_VNODE);
1994-05-24 10:09:53 +00:00
fp->f_ops = &vnops;
fp->f_data = (caddr_t)vp;
if (flags & (O_EXLOCK | O_SHLOCK)) {
lf.l_whence = SEEK_SET;
lf.l_start = 0;
lf.l_len = 0;
if (flags & O_EXLOCK)
lf.l_type = F_WRLCK;
else
lf.l_type = F_RDLCK;
type = F_FLOCK;
if ((flags & FNONBLOCK) == 0)
type |= F_WAIT;
VOP_UNLOCK(vp, 0, p);
if (error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type)) {
1994-05-24 10:09:53 +00:00
(void) vn_close(vp, fp->f_flag, fp->f_cred, p);
ffree(fp);
fdp->fd_ofiles[indx] = NULL;
return (error);
}
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
1994-05-24 10:09:53 +00:00
fp->f_flag |= FHASLOCK;
}
if ((vp->v_type == VREG) && (vp->v_object == NULL))
vfs_object_create(vp, p, p->p_ucred, TRUE);
VOP_UNLOCK(vp, 0, p);
p->p_retval[0] = indx;
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return (0);
}
#ifdef COMPAT_43
/*
* Create a file.
*/
#ifndef _SYS_SYSPROTO_H_
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struct ocreat_args {
char *path;
int mode;
};
#endif
int
ocreat(p, uap)
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struct proc *p;
register struct ocreat_args /* {
syscallarg(char *) path;
syscallarg(int) mode;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
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));
1994-05-24 10:09:53 +00:00
}
#endif /* COMPAT_43 */
/*
* Create a special file.
*/
#ifndef _SYS_SYSPROTO_H_
1994-05-24 10:09:53 +00:00
struct mknod_args {
char *path;
int mode;
int dev;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
mknod(p, uap)
1994-05-24 10:09:53 +00:00
struct proc *p;
register struct mknod_args /* {
syscallarg(char *) path;
syscallarg(int) mode;
syscallarg(int) dev;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
register struct vnode *vp;
struct vattr vattr;
int error;
int whiteout;
1994-05-24 10:09:53 +00:00
struct nameidata nd;
error = suser(p->p_ucred, &p->p_acflag);
if (error)
1994-05-24 10:09:53 +00:00
return (error);
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
if (error = namei(&nd))
1994-05-24 10:09:53 +00:00
return (error);
vp = nd.ni_vp;
if (vp != NULL)
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;
1994-05-24 10:09:53 +00:00
switch (SCARG(uap, mode) & S_IFMT) {
1994-05-24 10:09:53 +00:00
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;
1994-05-24 10:09:53 +00:00
default:
error = EINVAL;
break;
}
}
if (!error) {
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
if (whiteout) {
error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, CREATE);
if (error)
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
vput(nd.ni_dvp);
} else {
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp,
&nd.ni_cnd, &vattr);
vput(nd.ni_dvp);
}
1994-05-24 10:09:53 +00:00
} else {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
if (vp)
vrele(vp);
}
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "mknod");
ASSERT_VOP_UNLOCKED(nd.ni_vp, "mknod");
1994-05-24 10:09:53 +00:00
return (error);
}
/*
* Create a named pipe.
1994-05-24 10:09:53 +00:00
*/
#ifndef _SYS_SYSPROTO_H_
1994-05-24 10:09:53 +00:00
struct mkfifo_args {
char *path;
int mode;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
mkfifo(p, uap)
1994-05-24 10:09:53 +00:00
struct proc *p;
register struct mkfifo_args /* {
syscallarg(char *) path;
syscallarg(int) mode;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
struct vattr vattr;
int error;
struct nameidata nd;
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
if (error = namei(&nd))
1994-05-24 10:09:53 +00:00
return (error);
if (nd.ni_vp != NULL) {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == nd.ni_vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
vrele(nd.ni_vp);
return (EEXIST);
}
VATTR_NULL(&vattr);
vattr.va_type = VFIFO;
vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_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);
vput(nd.ni_dvp);
return (error);
1994-05-24 10:09:53 +00:00
}
/*
* Make a hard file link.
*/
#ifndef _SYS_SYSPROTO_H_
1994-05-24 10:09:53 +00:00
struct link_args {
char *path;
char *link;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
link(p, uap)
1994-05-24 10:09:53 +00:00
struct proc *p;
register struct link_args /* {
syscallarg(char *) path;
syscallarg(char *) link;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
register struct vnode *vp;
struct nameidata nd;
int error;
NDINIT(&nd, LOOKUP, FOLLOW|NOOBJ, UIO_USERSPACE, SCARG(uap, path), p);
if (error = namei(&nd))
1994-05-24 10:09:53 +00:00
return (error);
vp = nd.ni_vp;
if (vp->v_type == VDIR)
error = EPERM; /* POSIX */
else {
NDINIT(&nd, CREATE, LOCKPARENT|NOOBJ, UIO_USERSPACE, SCARG(uap, link), p);
error = namei(&nd);
if (!error) {
if (nd.ni_vp != NULL) {
1994-05-24 10:09:53 +00:00
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_vp)
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);
1994-05-24 10:09:53 +00:00
}
if (nd.ni_dvp == nd.ni_vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
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}
}
vrele(vp);
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "link");
ASSERT_VOP_UNLOCKED(nd.ni_vp, "link");
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return (error);
}
/*
* Make a symbolic link.
*/
#ifndef _SYS_SYSPROTO_H_
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struct symlink_args {
char *path;
char *link;
};
#endif
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/* ARGSUSED */
int
symlink(p, uap)
1994-05-24 10:09:53 +00:00
struct proc *p;
register struct symlink_args /* {
syscallarg(char *) path;
syscallarg(char *) link;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
struct vattr vattr;
char *path;
int error;
struct nameidata nd;
path = zalloc(namei_zone);
if (error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, NULL))
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goto out;
NDINIT(&nd, CREATE, LOCKPARENT|NOOBJ, UIO_USERSPACE, SCARG(uap, link), p);
if (error = namei(&nd))
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goto out;
if (nd.ni_vp) {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == nd.ni_vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
vrele(nd.ni_vp);
error = EEXIST;
goto out;
}
VATTR_NULL(&vattr);
vattr.va_mode = ACCESSPERMS &~ p->p_fd->fd_cmask;
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
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error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, path);
vput(nd.ni_dvp);
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "symlink");
ASSERT_VOP_UNLOCKED(nd.ni_vp, "symlink");
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out:
zfree(namei_zone, path);
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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 nameidata nd;
NDINIT(&nd, DELETE, LOCKPARENT|DOWHITEOUT, UIO_USERSPACE,
SCARG(uap, path), p);
error = namei(&nd);
if (error)
return (error);
if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & ISWHITEOUT)) {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == nd.ni_vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
if (nd.ni_vp)
vrele(nd.ni_vp);
return (EEXIST);
}
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
if (error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, DELETE))
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
vput(nd.ni_dvp);
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "undelete");
ASSERT_VOP_UNLOCKED(nd.ni_vp, "undelete");
return (error);
}
1994-05-24 10:09:53 +00:00
/*
* Delete a name from the filesystem.
*/
#ifndef _SYS_SYSPROTO_H_
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struct unlink_args {
char *path;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
unlink(p, uap)
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struct proc *p;
struct unlink_args /* {
syscallarg(char *) path;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
register struct vnode *vp;
int error;
struct nameidata nd;
NDINIT(&nd, DELETE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
if (error = namei(&nd))
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return (error);
vp = nd.ni_vp;
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
1994-05-24 10:09:53 +00:00
if (vp->v_type == VDIR)
error = EPERM; /* POSIX */
else {
1994-05-24 10:09:53 +00:00
/*
* The root of a mounted filesystem cannot be deleted.
*
* XXX: can this only be a VDIR case?
1994-05-24 10:09:53 +00:00
*/
if (vp->v_flag & VROOT)
error = EBUSY;
}
if (!error) {
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
error = VOP_REMOVE(nd.ni_dvp, vp, &nd.ni_cnd);
1994-05-24 10:09:53 +00:00
} else {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
}
if (nd.ni_dvp == vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
if (vp != NULLVP)
vput(vp);
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "unlink");
ASSERT_VOP_UNLOCKED(nd.ni_vp, "unlink");
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return (error);
}
/*
* Reposition read/write file offset.
*/
#ifndef _SYS_SYSPROTO_H_
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struct lseek_args {
int fd;
int pad;
off_t offset;
int whence;
};
#endif
int
lseek(p, uap)
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struct proc *p;
register struct lseek_args /* {
syscallarg(int) fd;
syscallarg(int) pad;
syscallarg(off_t) offset;
syscallarg(int) whence;
} */ *uap;
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{
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)
1994-05-24 10:09:53 +00:00
return (EBADF);
if (fp->f_type != DTYPE_VNODE)
return (ESPIPE);
switch (SCARG(uap, whence)) {
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case L_INCR:
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fp->f_offset += SCARG(uap, offset);
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break;
case L_XTND:
error=VOP_GETATTR((struct vnode *)fp->f_data, &vattr, cred, p);
if (error)
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return (error);
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fp->f_offset = SCARG(uap, offset) + vattr.va_size;
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break;
case L_SET:
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fp->f_offset = SCARG(uap, offset);
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break;
default:
return (EINVAL);
}
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*(off_t *)(p->p_retval) = fp->f_offset;
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return (0);
}
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
/*
* Reposition read/write file offset.
*/
#ifndef _SYS_SYSPROTO_H_
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struct olseek_args {
int fd;
long offset;
int whence;
};
#endif
int
olseek(p, uap)
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struct proc *p;
register struct olseek_args /* {
syscallarg(int) fd;
syscallarg(long) offset;
syscallarg(int) whence;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
struct lseek_args /* {
syscallarg(int) fd;
syscallarg(int) pad;
syscallarg(off_t) offset;
syscallarg(int) whence;
} */ nuap;
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int error;
SCARG(&nuap, fd) = SCARG(uap, fd);
SCARG(&nuap, offset) = SCARG(uap, offset);
SCARG(&nuap, whence) = SCARG(uap, whence);
error = lseek(p, &nuap);
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return (error);
}
#endif /* COMPAT_43 */
/*
* Check access permissions.
*/
#ifndef _SYS_SYSPROTO_H_
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struct access_args {
char *path;
int flags;
};
#endif
int
access(p, uap)
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struct proc *p;
register struct access_args /* {
syscallarg(char *) path;
syscallarg(int) flags;
} */ *uap;
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{
register struct ucred *cred = p->p_ucred;
register struct vnode *vp;
int error, flags, t_gid, t_uid;
struct nameidata nd;
t_uid = cred->cr_uid;
t_gid = cred->cr_groups[0];
cred->cr_uid = p->p_cred->p_ruid;
cred->cr_groups[0] = p->p_cred->p_rgid;
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
SCARG(uap, path), p);
if (error = namei(&nd))
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goto out1;
vp = nd.ni_vp;
/* Flags == 0 means only check for existence. */
if (SCARG(uap, flags)) {
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flags = 0;
if (SCARG(uap, flags) & R_OK)
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flags |= VREAD;
if (SCARG(uap, flags) & W_OK)
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flags |= VWRITE;
if (SCARG(uap, flags) & X_OK)
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flags |= VEXEC;
if ((flags & VWRITE) == 0 || (error = vn_writechk(vp)) == 0)
error = VOP_ACCESS(vp, flags, cred, p);
}
vput(vp);
out1:
cred->cr_uid = t_uid;
cred->cr_groups[0] = t_gid;
return (error);
}
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
/*
* Get file status; this version follows links.
*/
#ifndef _SYS_SYSPROTO_H_
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struct ostat_args {
char *path;
struct ostat *ub;
};
#endif
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/* ARGSUSED */
int
ostat(p, uap)
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struct proc *p;
register struct ostat_args /* {
syscallarg(char *) path;
syscallarg(struct ostat *) ub;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
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))
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return (error);
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));
1994-05-24 10:09:53 +00:00
return (error);
}
/*
* Get file status; this version does not follow links.
*/
#ifndef _SYS_SYSPROTO_H_
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struct olstat_args {
char *path;
struct ostat *ub;
};
#endif
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/* ARGSUSED */
int
olstat(p, uap)
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struct proc *p;
register struct olstat_args /* {
syscallarg(char *) path;
syscallarg(struct ostat *) ub;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
struct vnode *vp;
struct stat sb;
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struct ostat osb;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
SCARG(uap, path), p);
if (error = namei(&nd))
1994-05-24 10:09:53 +00:00
return (error);
vp = nd.ni_vp;
error = vn_stat(vp, &sb, p);
vput(vp);
if (error)
return (error);
1994-05-24 10:09:53 +00:00
cvtstat(&sb, &osb);
error = copyout((caddr_t)&osb, (caddr_t)SCARG(uap, ub), sizeof (osb));
1994-05-24 10:09:53 +00:00
return (error);
}
/*
* Convert from an old to a new stat structure.
*/
void
1994-05-24 10:09:53 +00:00
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_
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struct stat_args {
char *path;
struct stat *ub;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
stat(p, uap)
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struct proc *p;
register struct stat_args /* {
syscallarg(char *) path;
syscallarg(struct stat *) ub;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
struct stat sb;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
SCARG(uap, path), p);
if (error = namei(&nd))
1994-05-24 10:09:53 +00:00
return (error);
error = vn_stat(nd.ni_vp, &sb, p);
vput(nd.ni_vp);
if (error)
return (error);
error = copyout((caddr_t)&sb, (caddr_t)SCARG(uap, ub), sizeof (sb));
1994-05-24 10:09:53 +00:00
return (error);
}
/*
* Get file status; this version does not follow links.
*/
#ifndef _SYS_SYSPROTO_H_
1994-05-24 10:09:53 +00:00
struct lstat_args {
char *path;
struct stat *ub;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
lstat(p, uap)
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struct proc *p;
register struct lstat_args /* {
syscallarg(char *) path;
syscallarg(struct stat *) ub;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
int error;
struct vnode *vp;
struct stat sb;
1994-05-24 10:09:53 +00:00
struct nameidata nd;
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
SCARG(uap, path), p);
if (error = namei(&nd))
1994-05-24 10:09:53 +00:00
return (error);
vp = nd.ni_vp;
error = vn_stat(vp, &sb, p);
vput(vp);
if (error)
return (error);
error = copyout((caddr_t)&sb, (caddr_t)SCARG(uap, ub), sizeof (sb));
1994-05-24 10:09:53 +00:00
return (error);
}
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;
}
#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))
return (error);
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);
}
/*
* 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))
return (error);
vp = nd.ni_vp;
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);
}
1994-05-24 10:09:53 +00:00
/*
* Get configurable pathname variables.
*/
#ifndef _SYS_SYSPROTO_H_
1994-05-24 10:09:53 +00:00
struct pathconf_args {
char *path;
int name;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
pathconf(p, uap)
1994-05-24 10:09:53 +00:00
struct proc *p;
register struct pathconf_args /* {
syscallarg(char *) path;
syscallarg(int) name;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
SCARG(uap, path), p);
if (error = namei(&nd))
1994-05-24 10:09:53 +00:00
return (error);
error = VOP_PATHCONF(nd.ni_vp, SCARG(uap, name), p->p_retval);
1994-05-24 10:09:53 +00:00
vput(nd.ni_vp);
return (error);
}
/*
* Return target name of a symbolic link.
*/
#ifndef _SYS_SYSPROTO_H_
1994-05-24 10:09:53 +00:00
struct readlink_args {
char *path;
char *buf;
int count;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
readlink(p, uap)
1994-05-24 10:09:53 +00:00
struct proc *p;
register struct readlink_args /* {
syscallarg(char *) path;
syscallarg(char *) buf;
syscallarg(int) count;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
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))
1994-05-24 10:09:53 +00:00
return (error);
vp = nd.ni_vp;
if (vp->v_type != VLNK)
error = EINVAL;
else {
aiov.iov_base = SCARG(uap, buf);
aiov.iov_len = SCARG(uap, count);
1994-05-24 10:09:53 +00:00
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);
1994-05-24 10:09:53 +00:00
error = VOP_READLINK(vp, &auio, p->p_ucred);
}
vput(vp);
p->p_retval[0] = SCARG(uap, count) - auio.uio_resid;
1994-05-24 10:09:53 +00:00
return (error);
}
static int
setfflags(p, vp, flags)
struct proc *p;
struct vnode *vp;
int flags;
{
int error;
struct vattr vattr;
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
if (error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p)) {
return error;
}
VATTR_NULL(&vattr);
vattr.va_flags = flags;
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
VOP_UNLOCK(vp, 0, p);
return error;
}
1994-05-24 10:09:53 +00:00
/*
* Change flags of a file given a path name.
*/
#ifndef _SYS_SYSPROTO_H_
1994-05-24 10:09:53 +00:00
struct chflags_args {
char *path;
int flags;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
chflags(p, uap)
1994-05-24 10:09:53 +00:00
struct proc *p;
register struct chflags_args /* {
syscallarg(char *) path;
syscallarg(int) flags;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
if (error = namei(&nd))
1994-05-24 10:09:53 +00:00
return (error);
error = setfflags(p, nd.ni_vp, SCARG(uap, flags));
vrele(nd.ni_vp);
return error;
1994-05-24 10:09:53 +00:00
}
/*
* Change flags of a file given a file descriptor.
*/
#ifndef _SYS_SYSPROTO_H_
1994-05-24 10:09:53 +00:00
struct fchflags_args {
int fd;
int flags;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
fchflags(p, uap)
1994-05-24 10:09:53 +00:00
struct proc *p;
register struct fchflags_args /* {
syscallarg(int) fd;
syscallarg(int) flags;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
struct file *fp;
int error;
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
1994-05-24 10:09:53 +00:00
return (error);
return setfflags(p, (struct vnode *) fp->f_data, SCARG(uap, flags));
}
static int
setfmode(p, vp, mode)
struct proc *p;
struct vnode *vp;
int mode;
{
int error;
struct vattr vattr;
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
if (error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p)) {
return error;
}
VATTR_NULL(&vattr);
vattr.va_mode = mode & ALLPERMS;
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
VOP_UNLOCK(vp, 0, p);
return error;
1994-05-24 10:09:53 +00:00
}
/*
* Change mode of a file given path name.
*/
#ifndef _SYS_SYSPROTO_H_
1994-05-24 10:09:53 +00:00
struct chmod_args {
char *path;
int mode;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
chmod(p, uap)
1994-05-24 10:09:53 +00:00
struct proc *p;
register struct chmod_args /* {
syscallarg(char *) path;
syscallarg(int) mode;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
if (error = namei(&nd))
1994-05-24 10:09:53 +00:00
return (error);
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))
return (error);
error = setfmode(p, nd.ni_vp, SCARG(uap, mode));
vrele(nd.ni_vp);
return error;
1994-05-24 10:09:53 +00:00
}
/*
* Change mode of a file given a file descriptor.
*/
#ifndef _SYS_SYSPROTO_H_
1994-05-24 10:09:53 +00:00
struct fchmod_args {
int fd;
int mode;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
fchmod(p, uap)
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struct proc *p;
register struct fchmod_args /* {
syscallarg(int) fd;
syscallarg(int) mode;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
struct file *fp;
int error;
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
1994-05-24 10:09:53 +00:00
return (error);
return setfmode(p, (struct vnode *)fp->f_data, SCARG(uap, mode));
}
static int
setfown(p, vp, uid, gid)
struct proc *p;
struct vnode *vp;
uid_t uid;
gid_t gid;
{
int error;
struct vattr vattr;
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
if (error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p)) {
return error;
}
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);
return error;
1994-05-24 10:09:53 +00:00
}
/*
* Set ownership given a path name.
*/
#ifndef _SYS_SYSPROTO_H_
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struct chown_args {
char *path;
int uid;
int gid;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
chown(p, uap)
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struct proc *p;
register struct chown_args /* {
syscallarg(char *) path;
syscallarg(int) uid;
syscallarg(int) gid;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
if (error = namei(&nd))
1994-05-24 10:09:53 +00:00
return (error);
error = setfown(p, nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid));
vrele(nd.ni_vp);
1994-05-24 10:09:53 +00:00
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))
return (error);
error = setfown(p, nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid));
vrele(nd.ni_vp);
return (error);
}
1994-05-24 10:09:53 +00:00
/*
* Set ownership given a file descriptor.
*/
#ifndef _SYS_SYSPROTO_H_
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struct fchown_args {
int fd;
int uid;
int gid;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
fchown(p, uap)
1994-05-24 10:09:53 +00:00
struct proc *p;
register struct fchown_args /* {
syscallarg(int) fd;
syscallarg(int) uid;
syscallarg(int) gid;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
struct file *fp;
int error;
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
1994-05-24 10:09:53 +00:00
return (error);
return setfown(p, (struct vnode *)fp->f_data,
SCARG(uap, uid), SCARG(uap, gid));
}
static int
setutimes(p, vp, tv, nullflag)
struct proc *p;
struct vnode *vp;
struct timeval *tv;
int nullflag;
{
int error;
struct vattr vattr;
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
if (error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p)) {
return error;
}
VATTR_NULL(&vattr);
vattr.va_atime.tv_sec = tv[0].tv_sec;
vattr.va_atime.tv_nsec = tv[0].tv_usec * 1000;
vattr.va_mtime.tv_sec = tv[1].tv_sec;
vattr.va_mtime.tv_nsec = tv[1].tv_usec * 1000;
if (nullflag)
vattr.va_vaflags |= VA_UTIMES_NULL;
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
VOP_UNLOCK(vp, 0, p);
return error;
1994-05-24 10:09:53 +00:00
}
/*
* Set the access and modification times of a file.
*/
#ifndef _SYS_SYSPROTO_H_
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struct utimes_args {
char *path;
struct timeval *tptr;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
utimes(p, uap)
1994-05-24 10:09:53 +00:00
struct proc *p;
register struct utimes_args /* {
syscallarg(char *) path;
syscallarg(struct timeval *) tptr;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
struct timeval tv[2];
int error;
struct nameidata nd;
int nullflag;
1994-05-24 10:09:53 +00:00
nullflag = 0;
if (SCARG(uap, tptr) == NULL) {
1994-05-24 10:09:53 +00:00
microtime(&tv[0]);
tv[1] = tv[0];
nullflag = 1;
} else if (error = copyin((caddr_t)SCARG(uap, tptr), (caddr_t)tv,
sizeof (tv)))
return (error);
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
if (error = namei(&nd))
1994-05-24 10:09:53 +00:00
return (error);
error = setutimes(p, nd.ni_vp, tv, nullflag);
vrele(nd.ni_vp);
1994-05-24 10:09:53 +00:00
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 timeval tv[2];
int error;
struct nameidata nd;
int nullflag;
nullflag = 0;
if (SCARG(uap, tptr) == NULL) {
microtime(&tv[0]);
tv[1] = tv[0];
nullflag = 1;
} else if (error = copyin((caddr_t)SCARG(uap, tptr), (caddr_t)tv,
sizeof (tv)))
return (error);
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
if (error = namei(&nd))
return (error);
error = setutimes(p, nd.ni_vp, tv, nullflag);
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 timeval tv[2];
struct file *fp;
int error;
int nullflag;
nullflag = 0;
if (SCARG(uap, tptr) == NULL) {
microtime(&tv[0]);
tv[1] = tv[0];
nullflag = 1;
} else if (error = copyin((caddr_t)SCARG(uap, tptr), (caddr_t)tv,
sizeof (tv)))
return (error);
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
return (error);
return setutimes(p, (struct vnode *)fp->f_data, tv, nullflag);
}
1994-05-24 10:09:53 +00:00
/*
* Truncate a file given its path name.
*/
#ifndef _SYS_SYSPROTO_H_
1994-05-24 10:09:53 +00:00
struct truncate_args {
char *path;
int pad;
off_t length;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
truncate(p, uap)
1994-05-24 10:09:53 +00:00
struct proc *p;
register struct truncate_args /* {
syscallarg(char *) path;
syscallarg(int) pad;
syscallarg(off_t) length;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
register 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))
1994-05-24 10:09:53 +00:00
return (error);
vp = nd.ni_vp;
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
1994-05-24 10:09:53 +00:00
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);
1994-05-24 10:09:53 +00:00
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
}
vput(vp);
return (error);
}
/*
* Truncate a file given a file descriptor.
*/
#ifndef _SYS_SYSPROTO_H_
1994-05-24 10:09:53 +00:00
struct ftruncate_args {
int fd;
int pad;
off_t length;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
ftruncate(p, uap)
1994-05-24 10:09:53 +00:00
struct proc *p;
register struct ftruncate_args /* {
syscallarg(int) fd;
syscallarg(int) pad;
syscallarg(off_t) length;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
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))
1994-05-24 10:09:53 +00:00
return (error);
if ((fp->f_flag & FWRITE) == 0)
return (EINVAL);
vp = (struct vnode *)fp->f_data;
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
1994-05-24 10:09:53 +00:00
if (vp->v_type == VDIR)
error = EISDIR;
else if ((error = vn_writechk(vp)) == 0) {
VATTR_NULL(&vattr);
vattr.va_size = SCARG(uap, length);
1994-05-24 10:09:53 +00:00
error = VOP_SETATTR(vp, &vattr, fp->f_cred, p);
}
VOP_UNLOCK(vp, 0, p);
1994-05-24 10:09:53 +00:00
return (error);
}
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
/*
* Truncate a file given its path name.
*/
#ifndef _SYS_SYSPROTO_H_
1994-05-24 10:09:53 +00:00
struct otruncate_args {
char *path;
long length;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
otruncate(p, uap)
1994-05-24 10:09:53 +00:00
struct proc *p;
register struct otruncate_args /* {
syscallarg(char *) path;
syscallarg(long) length;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
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));
1994-05-24 10:09:53 +00:00
}
/*
* Truncate a file given a file descriptor.
*/
#ifndef _SYS_SYSPROTO_H_
1994-05-24 10:09:53 +00:00
struct oftruncate_args {
int fd;
long length;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
oftruncate(p, uap)
1994-05-24 10:09:53 +00:00
struct proc *p;
register struct oftruncate_args /* {
syscallarg(int) fd;
syscallarg(long) length;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
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));
1994-05-24 10:09:53 +00:00
}
#endif /* COMPAT_43 || COMPAT_SUNOS */
/*
* Sync an open file.
*/
#ifndef _SYS_SYSPROTO_H_
1994-05-24 10:09:53 +00:00
struct fsync_args {
int fd;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
fsync(p, uap)
1994-05-24 10:09:53 +00:00
struct proc *p;
struct fsync_args /* {
syscallarg(int) fd;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
register struct vnode *vp;
struct file *fp;
int error;
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
1994-05-24 10:09:53 +00:00
return (error);
vp = (struct vnode *)fp->f_data;
This mega-commit is meant to fix numerous interrelated problems. There has been some bitrot and incorrect assumptions in the vfs_bio code. These problems have manifest themselves worse on NFS type filesystems, but can still affect local filesystems under certain circumstances. Most of the problems have involved mmap consistancy, and as a side-effect broke the vfs.ioopt code. This code might have been committed seperately, but almost everything is interrelated. 1) Allow (pmap_object_init_pt) prefaulting of buffer-busy pages that are fully valid. 2) Rather than deactivating erroneously read initial (header) pages in kern_exec, we now free them. 3) Fix the rundown of non-VMIO buffers that are in an inconsistent (missing vp) state. 4) Fix the disassociation of pages from buffers in brelse. The previous code had rotted and was faulty in a couple of important circumstances. 5) Remove a gratuitious buffer wakeup in vfs_vmio_release. 6) Remove a crufty and currently unused cluster mechanism for VBLK files in vfs_bio_awrite. When the code is functional, I'll add back a cleaner version. 7) The page busy count wakeups assocated with the buffer cache usage were incorrectly cleaned up in a previous commit by me. Revert to the original, correct version, but with a cleaner implementation. 8) The cluster read code now tries to keep data associated with buffers more aggressively (without breaking the heuristics) when it is presumed that the read data (buffers) will be soon needed. 9) Change to filesystem lockmgr locks so that they use LK_NOPAUSE. The delay loop waiting is not useful for filesystem locks, due to the length of the time intervals. 10) Correct and clean-up spec_getpages. 11) Implement a fully functional nfs_getpages, nfs_putpages. 12) Fix nfs_write so that modifications are coherent with the NFS data on the server disk (at least as well as NFS seems to allow.) 13) Properly support MS_INVALIDATE on NFS. 14) Properly pass down MS_INVALIDATE to lower levels of the VM code from vm_map_clean. 15) Better support the notion of pages being busy but valid, so that fewer in-transit waits occur. (use p->busy more for pageouts instead of PG_BUSY.) Since the page is fully valid, it is still usable for reads. 16) It is possible (in error) for cached pages to be busy. Make the page allocation code handle that case correctly. (It should probably be a printf or panic, but I want the system to handle coding errors robustly. I'll probably add a printf.) 17) Correct the design and usage of vm_page_sleep. It didn't handle consistancy problems very well, so make the design a little less lofty. After vm_page_sleep, if it ever blocked, it is still important to relookup the page (if the object generation count changed), and verify it's status (always.) 18) In vm_pageout.c, vm_pageout_clean had rotted, so clean that up. 19) Push the page busy for writes and VM_PROT_READ into vm_pageout_flush. 20) Fix vm_pager_put_pages and it's descendents to support an int flag instead of a boolean, so that we can pass down the invalidate bit.
1998-03-07 21:37:31 +00:00
if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p)) == NULL) {
1998-02-08 01:41:33 +00:00
if (vp->v_object) {
This mega-commit is meant to fix numerous interrelated problems. There has been some bitrot and incorrect assumptions in the vfs_bio code. These problems have manifest themselves worse on NFS type filesystems, but can still affect local filesystems under certain circumstances. Most of the problems have involved mmap consistancy, and as a side-effect broke the vfs.ioopt code. This code might have been committed seperately, but almost everything is interrelated. 1) Allow (pmap_object_init_pt) prefaulting of buffer-busy pages that are fully valid. 2) Rather than deactivating erroneously read initial (header) pages in kern_exec, we now free them. 3) Fix the rundown of non-VMIO buffers that are in an inconsistent (missing vp) state. 4) Fix the disassociation of pages from buffers in brelse. The previous code had rotted and was faulty in a couple of important circumstances. 5) Remove a gratuitious buffer wakeup in vfs_vmio_release. 6) Remove a crufty and currently unused cluster mechanism for VBLK files in vfs_bio_awrite. When the code is functional, I'll add back a cleaner version. 7) The page busy count wakeups assocated with the buffer cache usage were incorrectly cleaned up in a previous commit by me. Revert to the original, correct version, but with a cleaner implementation. 8) The cluster read code now tries to keep data associated with buffers more aggressively (without breaking the heuristics) when it is presumed that the read data (buffers) will be soon needed. 9) Change to filesystem lockmgr locks so that they use LK_NOPAUSE. The delay loop waiting is not useful for filesystem locks, due to the length of the time intervals. 10) Correct and clean-up spec_getpages. 11) Implement a fully functional nfs_getpages, nfs_putpages. 12) Fix nfs_write so that modifications are coherent with the NFS data on the server disk (at least as well as NFS seems to allow.) 13) Properly support MS_INVALIDATE on NFS. 14) Properly pass down MS_INVALIDATE to lower levels of the VM code from vm_map_clean. 15) Better support the notion of pages being busy but valid, so that fewer in-transit waits occur. (use p->busy more for pageouts instead of PG_BUSY.) Since the page is fully valid, it is still usable for reads. 16) It is possible (in error) for cached pages to be busy. Make the page allocation code handle that case correctly. (It should probably be a printf or panic, but I want the system to handle coding errors robustly. I'll probably add a printf.) 17) Correct the design and usage of vm_page_sleep. It didn't handle consistancy problems very well, so make the design a little less lofty. After vm_page_sleep, if it ever blocked, it is still important to relookup the page (if the object generation count changed), and verify it's status (always.) 18) In vm_pageout.c, vm_pageout_clean had rotted, so clean that up. 19) Push the page busy for writes and VM_PROT_READ into vm_pageout_flush. 20) Fix vm_pager_put_pages and it's descendents to support an int flag instead of a boolean, so that we can pass down the invalidate bit.
1998-03-07 21:37:31 +00:00
vm_object_page_clean(vp->v_object, 0, 0, FALSE);
1998-02-08 01:41:33 +00:00
}
if (vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP)) {
error = VOP_FSYNC(vp, fp->f_cred, MNT_LAZY, p);
} else {
error = VOP_FSYNC(vp, fp->f_cred,
(vp->v_mount && (vp->v_mount->mnt_flag & MNT_ASYNC)) ?
MNT_NOWAIT : MNT_WAIT, p);
}
1998-02-08 01:41:33 +00:00
VOP_UNLOCK(vp, 0, p);
if ((vp->v_mount->mnt_flag & MNT_SOFTDEP) && bioops.io_sync)
(*bioops.io_sync)(NULL);
}
1994-05-24 10:09:53 +00:00
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_
1994-05-24 10:09:53 +00:00
struct rename_args {
char *from;
char *to;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
rename(p, uap)
1994-05-24 10:09:53 +00:00
struct proc *p;
register struct rename_args /* {
syscallarg(char *) from;
syscallarg(char *) to;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
register struct vnode *tvp, *fvp, *tdvp;
struct nameidata fromnd, tond;
int error;
NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE,
SCARG(uap, from), p);
if (error = namei(&fromnd))
1994-05-24 10:09:53 +00:00
return (error);
fvp = fromnd.ni_vp;
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)) {
/* Translate error code for rename("dir1", "dir2/."). */
if (error == EISDIR && fvp->v_type == VDIR)
error = EINVAL;
1994-05-24 10:09:53 +00:00
VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
vrele(fromnd.ni_dvp);
vrele(fvp);
goto out1;
}
tdvp = tond.ni_dvp;
tvp = tond.ni_vp;
if (tvp != NULL) {
if (fvp->v_type == VDIR && tvp->v_type != VDIR) {
error = ENOTDIR;
goto out;
} else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {
error = EISDIR;
goto out;
}
}
if (fvp == tdvp)
error = EINVAL;
/*
* 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);
}
1994-05-24 10:09:53 +00:00
error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd,
tond.ni_dvp, tond.ni_vp, &tond.ni_cnd);
} else {
VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd);
if (tdvp == tvp)
vrele(tdvp);
else
vput(tdvp);
if (tvp)
vput(tvp);
VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
vrele(fromnd.ni_dvp);
vrele(fvp);
}
vrele(tond.ni_startdir);
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");
zfree(namei_zone, tond.ni_cnd.cn_pnbuf);
1994-05-24 10:09:53 +00:00
out1:
if (fromnd.ni_startdir)
vrele(fromnd.ni_startdir);
zfree(namei_zone, fromnd.ni_cnd.cn_pnbuf);
1994-05-24 10:09:53 +00:00
if (error == -1)
return (0);
return (error);
}
/*
* Make a directory file.
*/
#ifndef _SYS_SYSPROTO_H_
1994-05-24 10:09:53 +00:00
struct mkdir_args {
char *path;
int mode;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
mkdir(p, uap)
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struct proc *p;
register struct mkdir_args /* {
syscallarg(char *) path;
syscallarg(int) mode;
} */ *uap;
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{
register struct vnode *vp;
struct vattr vattr;
int error;
struct nameidata nd;
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
nd.ni_cnd.cn_flags |= WILLBEDIR;
if (error = namei(&nd))
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return (error);
vp = nd.ni_vp;
if (vp != NULL) {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
vrele(vp);
return (EEXIST);
}
VATTR_NULL(&vattr);
vattr.va_type = VDIR;
vattr.va_mode = (SCARG(uap, mode) & ACCESSPERMS) &~ p->p_fd->fd_cmask;
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
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error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
vput(nd.ni_dvp);
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if (!error)
vput(nd.ni_vp);
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "mkdir");
ASSERT_VOP_UNLOCKED(nd.ni_vp, "mkdir");
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return (error);
}
/*
* Remove a directory file.
*/
#ifndef _SYS_SYSPROTO_H_
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struct rmdir_args {
char *path;
};
#endif
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/* ARGSUSED */
int
rmdir(p, uap)
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struct proc *p;
struct rmdir_args /* {
syscallarg(char *) path;
} */ *uap;
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{
register struct vnode *vp;
int error;
struct nameidata nd;
NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE,
SCARG(uap, path), p);
if (error = namei(&nd))
1994-05-24 10:09:53 +00:00
return (error);
vp = nd.ni_vp;
if (vp->v_type != VDIR) {
error = ENOTDIR;
goto out;
}
/*
* No rmdir "." please.
*/
if (nd.ni_dvp == vp) {
error = EINVAL;
goto out;
}
/*
* The root of a mounted filesystem cannot be deleted.
*/
if (vp->v_flag & VROOT)
error = EBUSY;
out:
if (!error) {
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
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error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
} else {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
}
if (nd.ni_dvp == vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
if (vp != NULLVP)
vput(vp);
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "rmdir");
ASSERT_VOP_UNLOCKED(nd.ni_vp, "rmdir");
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return (error);
}
#ifdef COMPAT_43
/*
* Read a block of directory entries in a file system independent format.
*/
#ifndef _SYS_SYSPROTO_H_
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struct ogetdirentries_args {
int fd;
char *buf;
u_int count;
long *basep;
};
#endif
int
ogetdirentries(p, uap)
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struct proc *p;
register struct ogetdirentries_args /* {
syscallarg(int) fd;
syscallarg(char *) buf;
syscallarg(u_int) count;
syscallarg(long *) basep;
} */ *uap;
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{
register 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;
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long loff;
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
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return (error);
if ((fp->f_flag & FREAD) == 0)
return (EBADF);
vp = (struct vnode *)fp->f_data;
unionread:
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if (vp->v_type != VDIR)
return (EINVAL);
aiov.iov_base = SCARG(uap, buf);
aiov.iov_len = SCARG(uap, count);
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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);
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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);
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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);
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kiov.iov_base = dirbuf;
error = VOP_READDIR(vp, &kuio, fp->f_cred, &eofflag,
NULL, NULL);
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fp->f_offset = kuio.uio_offset;
if (error == 0) {
readcnt = SCARG(uap, count) - kuio.uio_resid;
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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);
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if (error)
return (error);
#ifdef UNION
{
if ((SCARG(uap, count) == auio.uio_resid) &&
(vp->v_op == union_vnodeop_p)) {
struct vnode *lvp;
lvp = union_dircache(vp, p);
if (lvp != NULLVP) {
struct vattr va;
/*
* If the directory is opaque,
* then don't show lower entries
*/
error = VOP_GETATTR(vp, &va, fp->f_cred, p);
if (va.va_flags & OPAQUE) {
vput(lvp);
lvp = NULL;
}
}
if (lvp != NULLVP) {
error = VOP_OPEN(lvp, FREAD, fp->f_cred, p);
if (error) {
vput(lvp);
return (error);
}
VOP_UNLOCK(lvp, 0, p);
fp->f_data = (caddr_t) lvp;
fp->f_offset = 0;
error = vn_close(vp, FREAD, fp->f_cred, p);
if (error)
return (error);
vp = lvp;
goto unionread;
}
}
}
#endif /* UNION */
if ((SCARG(uap, count) == auio.uio_resid) &&
(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;
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return (error);
}
#endif /* COMPAT_43 */
1994-05-24 10:09:53 +00:00
/*
* Read a block of directory entries in a file system independent format.
*/
#ifndef _SYS_SYSPROTO_H_
1994-05-24 10:09:53 +00:00
struct getdirentries_args {
int fd;
char *buf;
u_int count;
long *basep;
};
#endif
int
getdirentries(p, uap)
1994-05-24 10:09:53 +00:00
struct proc *p;
register struct getdirentries_args /* {
syscallarg(int) fd;
syscallarg(char *) buf;
syscallarg(u_int) count;
syscallarg(long *) basep;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
register struct vnode *vp;
struct file *fp;
struct uio auio;
struct iovec aiov;
long loff;
int error, eofflag;
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if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
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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);
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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);
1994-05-24 10:09:53 +00:00
loff = auio.uio_offset = fp->f_offset;
error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, NULL, NULL);
1994-05-24 10:09:53 +00:00
fp->f_offset = auio.uio_offset;
VOP_UNLOCK(vp, 0, p);
1994-05-24 10:09:53 +00:00
if (error)
return (error);
#ifdef UNION
{
if ((SCARG(uap, count) == auio.uio_resid) &&
1994-05-24 10:09:53 +00:00
(vp->v_op == union_vnodeop_p)) {
struct vnode *lvp;
lvp = union_dircache(vp, p);
if (lvp != NULLVP) {
struct vattr va;
1994-05-24 10:09:53 +00:00
/*
* If the directory is opaque,
* then don't show lower entries
*/
error = VOP_GETATTR(vp, &va, fp->f_cred, p);
if (va.va_flags & OPAQUE) {
vput(lvp);
lvp = NULL;
}
}
1994-05-24 10:09:53 +00:00
if (lvp != NULLVP) {
error = VOP_OPEN(lvp, FREAD, fp->f_cred, p);
1994-05-24 10:09:53 +00:00
if (error) {
vput(lvp);
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return (error);
}
VOP_UNLOCK(lvp, 0, p);
fp->f_data = (caddr_t) lvp;
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fp->f_offset = 0;
error = vn_close(vp, FREAD, fp->f_cred, p);
1994-05-24 10:09:53 +00:00
if (error)
return (error);
vp = lvp;
1994-05-24 10:09:53 +00:00
goto unionread;
}
}
}
#endif /* UNION */
1994-05-24 10:09:53 +00:00
if ((SCARG(uap, count) == auio.uio_resid) &&
1994-05-24 10:09:53 +00:00
(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;
1994-05-24 10:09:53 +00:00
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);
}
1994-05-24 10:09:53 +00:00
/*
* Set the mode mask for creation of filesystem nodes.
*/
#ifndef _SYS_SYSPROTO_H_
1994-05-24 10:09:53 +00:00
struct umask_args {
int newmask;
};
#endif
int
umask(p, uap)
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struct proc *p;
struct umask_args /* {
syscallarg(int) newmask;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
register struct filedesc *fdp;
fdp = p->p_fd;
p->p_retval[0] = fdp->fd_cmask;
fdp->fd_cmask = SCARG(uap, newmask) & ALLPERMS;
1994-05-24 10:09:53 +00:00
return (0);
}
/*
* Void all references to file by ripping underlying filesystem
* away from vnode.
*/
#ifndef _SYS_SYSPROTO_H_
1994-05-24 10:09:53 +00:00
struct revoke_args {
char *path;
};
#endif
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
int
revoke(p, uap)
1994-05-24 10:09:53 +00:00
struct proc *p;
register struct revoke_args /* {
syscallarg(char *) path;
} */ *uap;
1994-05-24 10:09:53 +00:00
{
register 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))
1994-05-24 10:09:53 +00:00
return (error);
vp = nd.ni_vp;
if (error = VOP_GETATTR(vp, &vattr, p->p_ucred, p))
1994-05-24 10:09:53 +00:00
goto out;
if (p->p_ucred->cr_uid != vattr.va_uid &&
(error = suser(p->p_ucred, &p->p_acflag)))
goto out;
if (vp->v_usecount > 1 || (vp->v_flag & VALIASED))
VOP_REVOKE(vp, REVOKEALL);
1994-05-24 10:09:53 +00:00
out:
vrele(vp);
return (error);
}
/*
* Convert a user file descriptor to a kernel file entry.
*/
int
1994-05-24 10:09:53 +00:00
getvnode(fdp, fd, fpp)
struct filedesc *fdp;
int fd;
struct file **fpp;
1994-05-24 10:09:53 +00:00
{
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)
1994-05-24 10:09:53 +00:00
return (EINVAL);
*fpp = fp;
return (0);
}
#ifndef _SYS_SYSPROTO_H_
struct __getcwd_args {
u_char *buf;
u_int buflen;
};
#endif
#define STATNODE(mode, name, var) \
SYSCTL_INT(_vfs_cache, OID_AUTO, name, mode, var, 0, "");
static int disablecwd;
SYSCTL_INT(_debug, OID_AUTO, disablecwd, CTLFLAG_RW, &disablecwd, 0, "");
static u_long numcwdcalls; STATNODE(CTLFLAG_RD, numcwdcalls, &numcwdcalls);
static u_long numcwdfail1; STATNODE(CTLFLAG_RD, numcwdfail1, &numcwdfail1);
static u_long numcwdfail2; STATNODE(CTLFLAG_RD, numcwdfail2, &numcwdfail2);
static u_long numcwdfail3; STATNODE(CTLFLAG_RD, numcwdfail3, &numcwdfail3);
static u_long numcwdfail4; STATNODE(CTLFLAG_RD, numcwdfail4, &numcwdfail4);
static u_long numcwdfound; STATNODE(CTLFLAG_RD, numcwdfound, &numcwdfound);
int
__getcwd(p, uap)
struct proc *p;
struct __getcwd_args *uap;
{
char *bp, *buf;
int error, i, slash_prefixed;
struct filedesc *fdp;
struct namecache *ncp;
struct vnode *vp;
numcwdcalls++;
if (disablecwd)
return (ENODEV);
if (uap->buflen < 2)
return (EINVAL);
if (uap->buflen > MAXPATHLEN)
uap->buflen = MAXPATHLEN;
buf = bp = malloc(uap->buflen, M_TEMP, M_WAITOK);
bp += uap->buflen - 1;
*bp = '\0';
fdp = p->p_fd;
slash_prefixed = 0;
for (vp = fdp->fd_cdir; vp != fdp->fd_rdir && vp != rootvnode;) {
if (vp->v_flag & VROOT) {
vp = vp->v_mount->mnt_vnodecovered;
continue;
}
if (vp->v_dd->v_id != vp->v_ddid) {
numcwdfail1++;
free(buf, M_TEMP);
return (ENOTDIR);
}
ncp = TAILQ_FIRST(&vp->v_cache_dst);
if (!ncp) {
numcwdfail2++;
free(buf, M_TEMP);
return (ENOENT);
}
if (ncp->nc_dvp != vp->v_dd) {
numcwdfail3++;
free(buf, M_TEMP);
return (EBADF);
}
for (i = ncp->nc_nlen - 1; i >= 0; i--) {
if (bp == buf) {
numcwdfail4++;
free(buf, M_TEMP);
return (ENOMEM);
}
*--bp = ncp->nc_name[i];
}
if (bp == buf) {
numcwdfail4++;
free(buf, M_TEMP);
return (ENOMEM);
}
*--bp = '/';
slash_prefixed = 1;
vp = vp->v_dd;
}
if (!slash_prefixed) {
if (bp == buf) {
numcwdfail4++;
free(buf, M_TEMP);
return (ENOMEM);
}
*--bp = '/';
}
numcwdfound++;
error = copyout(bp, uap->buf, strlen(bp) + 1);
free(buf, M_TEMP);
return (error);
}