freebsd-dev/sys/ufs/lfs/lfs_vnops.c
1997-03-23 00:45:27 +00:00

379 lines
14 KiB
C

/*
* Copyright (c) 1986, 1989, 1991, 1993, 1995
* The Regents of the University of California. All rights reserved.
*
* 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.
*
* @(#)lfs_vnops.c 8.13 (Berkeley) 6/10/95
* $Id: lfs_vnops.c,v 1.20 1997/03/22 06:53:38 bde Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/resourcevar.h>
#include <sys/signalvar.h>
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/conf.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <sys/malloc.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_prot.h>
#include <vm/vm_page.h>
#include <vm/vm_object.h>
#include <vm/vm_extern.h>
#include <miscfs/specfs/specdev.h>
#include <miscfs/fifofs/fifo.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/dir.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ufs/ufs_extern.h>
#include <ufs/lfs/lfs.h>
#include <ufs/lfs/lfs_extern.h>
static int lfs_close __P((struct vop_close_args *));
static int lfs_fsync __P((struct vop_fsync_args *));
static int lfs_getattr __P((struct vop_getattr_args *));
static int lfs_inactive __P((struct vop_inactive_args *));
static int lfs_read __P((struct vop_read_args *));
static int lfs_write __P((struct vop_write_args *));
/* Global vfs data structures for lfs. */
vop_t **lfs_vnodeop_p;
static struct vnodeopv_entry_desc lfs_vnodeop_entries[] = {
{ &vop_default_desc, (vop_t *)vn_default_error },
{ &vop_lookup_desc, (vop_t *)ufs_lookup }, /* lookup */
{ &vop_create_desc, (vop_t *)ufs_create }, /* create */
{ &vop_mknod_desc, (vop_t *)ufs_mknod }, /* mknod */
{ &vop_whiteout_desc, (vop_t *)ufs_whiteout }, /* whiteout */
{ &vop_open_desc, (vop_t *)ufs_open }, /* open */
{ &vop_close_desc, (vop_t *)lfs_close }, /* close */
{ &vop_access_desc, (vop_t *)ufs_access }, /* access */
{ &vop_getattr_desc, (vop_t *)lfs_getattr }, /* getattr */
{ &vop_setattr_desc, (vop_t *)ufs_setattr }, /* setattr */
{ &vop_read_desc, (vop_t *)lfs_read }, /* read */
{ &vop_write_desc, (vop_t *)lfs_write }, /* write */
{ &vop_lease_desc, (vop_t *)ufs_lease_check }, /* lease */
{ &vop_ioctl_desc, (vop_t *)ufs_ioctl }, /* ioctl */
{ &vop_select_desc, (vop_t *)ufs_select }, /* select */
{ &vop_revoke_desc, (vop_t *)ufs_revoke }, /* revoke */
{ &vop_mmap_desc, (vop_t *)ufs_mmap }, /* mmap */
{ &vop_fsync_desc, (vop_t *)lfs_fsync }, /* fsync */
{ &vop_seek_desc, (vop_t *)ufs_seek }, /* seek */
{ &vop_remove_desc, (vop_t *)ufs_remove }, /* remove */
{ &vop_link_desc, (vop_t *)ufs_link }, /* link */
{ &vop_rename_desc, (vop_t *)ufs_rename }, /* rename */
{ &vop_mkdir_desc, (vop_t *)ufs_mkdir }, /* mkdir */
{ &vop_rmdir_desc, (vop_t *)ufs_rmdir }, /* rmdir */
{ &vop_symlink_desc, (vop_t *)ufs_symlink }, /* symlink */
{ &vop_readdir_desc, (vop_t *)ufs_readdir }, /* readdir */
{ &vop_readlink_desc, (vop_t *)ufs_readlink }, /* readlink */
{ &vop_abortop_desc, (vop_t *)ufs_abortop }, /* abortop */
{ &vop_inactive_desc, (vop_t *)ufs_inactive }, /* inactive */
{ &vop_reclaim_desc, (vop_t *)lfs_reclaim }, /* reclaim */
{ &vop_lock_desc, (vop_t *)ufs_lock }, /* lock */
{ &vop_unlock_desc, (vop_t *)ufs_unlock }, /* unlock */
{ &vop_bmap_desc, (vop_t *)ufs_bmap }, /* bmap */
{ &vop_strategy_desc, (vop_t *)ufs_strategy }, /* strategy */
{ &vop_print_desc, (vop_t *)ufs_print }, /* print */
{ &vop_islocked_desc, (vop_t *)ufs_islocked }, /* islocked */
{ &vop_pathconf_desc, (vop_t *)ufs_pathconf }, /* pathconf */
{ &vop_advlock_desc, (vop_t *)ufs_advlock }, /* advlock */
{ &vop_blkatoff_desc, (vop_t *)lfs_blkatoff }, /* blkatoff */
{ &vop_valloc_desc, (vop_t *)lfs_valloc }, /* valloc */
{ &vop_vfree_desc, (vop_t *)lfs_vfree }, /* vfree */
{ &vop_truncate_desc, (vop_t *)lfs_truncate }, /* truncate */
{ &vop_update_desc, (vop_t *)lfs_update }, /* update */
{ &vop_bwrite_desc, (vop_t *)lfs_bwrite }, /* bwrite */
{ NULL, NULL }
};
static struct vnodeopv_desc lfs_vnodeop_opv_desc =
{ &lfs_vnodeop_p, lfs_vnodeop_entries };
vop_t **lfs_specop_p;
static struct vnodeopv_entry_desc lfs_specop_entries[] = {
{ &vop_default_desc, (vop_t *)vn_default_error },
{ &vop_lookup_desc, (vop_t *)spec_lookup }, /* lookup */
{ &vop_create_desc, (vop_t *)spec_create }, /* create */
{ &vop_mknod_desc, (vop_t *)spec_mknod }, /* mknod */
{ &vop_open_desc, (vop_t *)spec_open }, /* open */
{ &vop_close_desc, (vop_t *)ufsspec_close }, /* close */
{ &vop_access_desc, (vop_t *)ufs_access }, /* access */
{ &vop_getattr_desc, (vop_t *)lfs_getattr }, /* getattr */
{ &vop_setattr_desc, (vop_t *)ufs_setattr }, /* setattr */
{ &vop_read_desc, (vop_t *)ufsspec_read }, /* read */
{ &vop_write_desc, (vop_t *)ufsspec_write }, /* write */
{ &vop_lease_desc, (vop_t *)spec_lease_check }, /* lease */
{ &vop_ioctl_desc, (vop_t *)spec_ioctl }, /* ioctl */
{ &vop_select_desc, (vop_t *)spec_select }, /* select */
{ &vop_revoke_desc, (vop_t *)spec_revoke }, /* revoke */
{ &vop_mmap_desc, (vop_t *)spec_mmap }, /* mmap */
{ &vop_fsync_desc, (vop_t *)spec_fsync }, /* fsync */
{ &vop_seek_desc, (vop_t *)spec_seek }, /* seek */
{ &vop_remove_desc, (vop_t *)spec_remove }, /* remove */
{ &vop_link_desc, (vop_t *)spec_link }, /* link */
{ &vop_rename_desc, (vop_t *)spec_rename }, /* rename */
{ &vop_mkdir_desc, (vop_t *)spec_mkdir }, /* mkdir */
{ &vop_rmdir_desc, (vop_t *)spec_rmdir }, /* rmdir */
{ &vop_symlink_desc, (vop_t *)spec_symlink }, /* symlink */
{ &vop_readdir_desc, (vop_t *)spec_readdir }, /* readdir */
{ &vop_readlink_desc, (vop_t *)spec_readlink }, /* readlink */
{ &vop_abortop_desc, (vop_t *)spec_abortop }, /* abortop */
{ &vop_inactive_desc, (vop_t *)ufs_inactive }, /* inactive */
{ &vop_reclaim_desc, (vop_t *)lfs_reclaim }, /* reclaim */
{ &vop_lock_desc, (vop_t *)ufs_lock }, /* lock */
{ &vop_unlock_desc, (vop_t *)ufs_unlock }, /* unlock */
{ &vop_bmap_desc, (vop_t *)spec_bmap }, /* bmap */
{ &vop_strategy_desc, (vop_t *)spec_strategy }, /* strategy */
{ &vop_print_desc, (vop_t *)ufs_print }, /* print */
{ &vop_islocked_desc, (vop_t *)ufs_islocked }, /* islocked */
{ &vop_pathconf_desc, (vop_t *)spec_pathconf }, /* pathconf */
{ &vop_advlock_desc, (vop_t *)spec_advlock }, /* advlock */
{ &vop_blkatoff_desc, (vop_t *)spec_blkatoff }, /* blkatoff */
{ &vop_valloc_desc, (vop_t *)spec_valloc }, /* valloc */
{ &vop_vfree_desc, (vop_t *)lfs_vfree }, /* vfree */
{ &vop_truncate_desc, (vop_t *)spec_truncate }, /* truncate */
{ &vop_update_desc, (vop_t *)lfs_update }, /* update */
{ &vop_bwrite_desc, (vop_t *)lfs_bwrite }, /* bwrite */
{ NULL, NULL }
};
static struct vnodeopv_desc lfs_specop_opv_desc =
{ &lfs_specop_p, lfs_specop_entries };
vop_t **lfs_fifoop_p;
static struct vnodeopv_entry_desc lfs_fifoop_entries[] = {
{ &vop_default_desc, (vop_t *)vn_default_error },
{ &vop_lookup_desc, (vop_t *)fifo_lookup }, /* lookup */
{ &vop_create_desc, (vop_t *)fifo_create }, /* create */
{ &vop_mknod_desc, (vop_t *)fifo_mknod }, /* mknod */
{ &vop_open_desc, (vop_t *)fifo_open }, /* open */
{ &vop_close_desc, (vop_t *)ufsfifo_close }, /* close */
{ &vop_access_desc, (vop_t *)ufs_access }, /* access */
{ &vop_getattr_desc, (vop_t *)lfs_getattr }, /* getattr */
{ &vop_setattr_desc, (vop_t *)ufs_setattr }, /* setattr */
{ &vop_read_desc, (vop_t *)ufsfifo_read }, /* read */
{ &vop_write_desc, (vop_t *)ufsfifo_write }, /* write */
{ &vop_lease_desc, (vop_t *)fifo_lease_check }, /* lease */
{ &vop_ioctl_desc, (vop_t *)fifo_ioctl }, /* ioctl */
{ &vop_select_desc, (vop_t *)fifo_select }, /* select */
{ &vop_revoke_desc, (vop_t *)fifo_revoke }, /* revoke */
{ &vop_mmap_desc, (vop_t *)fifo_mmap }, /* mmap */
{ &vop_fsync_desc, (vop_t *)fifo_fsync }, /* fsync */
{ &vop_seek_desc, (vop_t *)fifo_seek }, /* seek */
{ &vop_remove_desc, (vop_t *)fifo_remove }, /* remove */
{ &vop_link_desc, (vop_t *)fifo_link }, /* link */
{ &vop_rename_desc, (vop_t *)fifo_rename }, /* rename */
{ &vop_mkdir_desc, (vop_t *)fifo_mkdir }, /* mkdir */
{ &vop_rmdir_desc, (vop_t *)fifo_rmdir }, /* rmdir */
{ &vop_symlink_desc, (vop_t *)fifo_symlink }, /* symlink */
{ &vop_readdir_desc, (vop_t *)fifo_readdir }, /* readdir */
{ &vop_readlink_desc, (vop_t *)fifo_readlink }, /* readlink */
{ &vop_abortop_desc, (vop_t *)fifo_abortop }, /* abortop */
{ &vop_inactive_desc, (vop_t *)ufs_inactive }, /* inactive */
{ &vop_reclaim_desc, (vop_t *)lfs_reclaim }, /* reclaim */
{ &vop_lock_desc, (vop_t *)ufs_lock }, /* lock */
{ &vop_unlock_desc, (vop_t *)ufs_unlock }, /* unlock */
{ &vop_bmap_desc, (vop_t *)fifo_bmap }, /* bmap */
{ &vop_strategy_desc, (vop_t *)fifo_strategy }, /* strategy */
{ &vop_print_desc, (vop_t *)ufs_print }, /* print */
{ &vop_islocked_desc, (vop_t *)ufs_islocked }, /* islocked */
{ &vop_pathconf_desc, (vop_t *)fifo_pathconf }, /* pathconf */
{ &vop_advlock_desc, (vop_t *)fifo_advlock }, /* advlock */
{ &vop_blkatoff_desc, (vop_t *)fifo_blkatoff }, /* blkatoff */
{ &vop_valloc_desc, (vop_t *)fifo_valloc }, /* valloc */
{ &vop_vfree_desc, (vop_t *)lfs_vfree }, /* vfree */
{ &vop_truncate_desc, (vop_t *)fifo_truncate }, /* truncate */
{ &vop_update_desc, (vop_t *)lfs_update }, /* update */
{ &vop_bwrite_desc, (vop_t *)lfs_bwrite }, /* bwrite */
{ NULL, NULL }
};
static struct vnodeopv_desc lfs_fifoop_opv_desc =
{ &lfs_fifoop_p, lfs_fifoop_entries };
VNODEOP_SET(lfs_vnodeop_opv_desc);
VNODEOP_SET(lfs_specop_opv_desc);
VNODEOP_SET(lfs_fifoop_opv_desc);
#define LFS_READWRITE
#include <ufs/ufs/ufs_readwrite.c>
#undef LFS_READWRITE
/*
* Synch an open file.
*/
/* ARGSUSED */
static int
lfs_fsync(ap)
struct vop_fsync_args /* {
struct vnode *a_vp;
struct ucred *a_cred;
int a_waitfor;
struct proc *a_p;
} */ *ap;
{
struct timeval tv;
int error;
gettime(&tv);
error = (VOP_UPDATE(ap->a_vp, &tv, &tv,
ap->a_waitfor == MNT_WAIT ? LFS_SYNC : 0));
if(ap->a_waitfor == MNT_WAIT && ap->a_vp->v_dirtyblkhd.lh_first != NULL)
panic("lfs_fsync: dirty bufs");
return( error );
}
/*
* These macros are used to bracket UFS directory ops, so that we can
* identify all the pages touched during directory ops which need to
* be ordered and flushed atomically, so that they may be recovered.
*/
#define SET_DIROP(fs) { \
if ((fs)->lfs_writer) \
tsleep(&(fs)->lfs_dirops, PRIBIO + 1, "lfs_dirop", 0); \
++(fs)->lfs_dirops; \
(fs)->lfs_doifile = 1; \
}
#define SET_ENDOP(fs) { \
--(fs)->lfs_dirops; \
if (!(fs)->lfs_dirops) \
wakeup(&(fs)->lfs_writer); \
}
#define MARK_VNODE(dvp) (dvp)->v_flag |= VDIROP
/* XXX hack to avoid calling ITIMES in getattr */
static int
lfs_getattr(ap)
struct vop_getattr_args /* {
struct vnode *a_vp;
struct vattr *a_vap;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register struct inode *ip = VTOI(vp);
register struct vattr *vap = ap->a_vap;
/*
* Copy from inode table
*/
vap->va_fsid = ip->i_dev;
vap->va_fileid = ip->i_number;
vap->va_mode = ip->i_mode & ~IFMT;
vap->va_nlink = ip->i_nlink;
vap->va_uid = ip->i_uid;
vap->va_gid = ip->i_gid;
vap->va_rdev = (dev_t)ip->i_rdev;
vap->va_size = ip->i_din.di_size;
vap->va_atime.tv_sec = ip->i_atime;
vap->va_atime.tv_nsec = ip->i_atimensec;
vap->va_mtime.tv_sec = ip->i_mtime;
vap->va_mtime.tv_nsec = ip->i_mtimensec;
vap->va_ctime.tv_sec = ip->i_ctime;
vap->va_ctime.tv_nsec = ip->i_ctimensec;
vap->va_flags = ip->i_flags;
vap->va_gen = ip->i_gen;
/* this doesn't belong here */
if (vp->v_type == VBLK)
vap->va_blocksize = BLKDEV_IOSIZE;
else if (vp->v_type == VCHR)
vap->va_blocksize = MAXBSIZE;
else
vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize;
vap->va_bytes = dbtob(ip->i_blocks);
vap->va_type = vp->v_type;
vap->va_filerev = ip->i_modrev;
return (0);
}
/*
* Close called
*
* XXX -- we were using ufs_close, but since it updates the
* times on the inode, we might need to bump the uinodes
* count.
*/
/* ARGSUSED */
static int
lfs_close(ap)
struct vop_close_args /* {
struct vnode *a_vp;
int a_fflag;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register struct inode *ip = VTOI(vp);
int mod;
simple_lock(&vp->v_interlock);
if (vp->v_usecount > 1) {
mod = ip->i_flag & IN_MODIFIED;
ITIMES(ip, &time, &time);
if (!mod && ip->i_flag & IN_MODIFIED)
ip->i_lfs->lfs_uinodes++;
}
simple_unlock(&vp->v_interlock);
return (0);
}
/*
* Reclaim an inode so that it can be used for other purposes.
*/
int
lfs_reclaim(ap)
struct vop_reclaim_args /* {
struct vnode *a_vp;
struct proc *a_p;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
int error;
if (error = ufs_reclaim(vp, ap->a_p))
return (error);
FREE(vp->v_data, M_LFSNODE);
vp->v_data = NULL;
return (0);
}