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/* $OpenBSD: ffs_vnops.c,v 1.28 2002/11/08 04:34:18 art Exp $ */
/* $NetBSD: ffs_vnops.c,v 1.7 1996/05/11 18:27:24 mycroft Exp $ */
/*
* Copyright (c) 1982, 1986, 1989, 1993
* 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.
*
* @(#)ffs_vnops.c 8.10 (Berkeley) 8/10/94
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/resourcevar.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 <sys/signalvar.h>
#include <sys/pool.h>
#include <uvm/uvm_extern.h>
#include <miscfs/specfs/specdev.h>
#include <miscfs/fifofs/fifo.h>
#include <ufs/ufs/extattr.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/dir.h>
#include <ufs/ufs/ufs_extern.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ffs/fs.h>
#include <ufs/ffs/ffs_extern.h>
/* Global vfs data structures for ufs. */
int (**ffs_vnodeop_p)(void *);
struct vnodeopv_entry_desc ffs_vnodeop_entries[] = {
{ &vop_default_desc, vn_default_error },
{ &vop_lookup_desc, ufs_lookup }, /* lookup */
{ &vop_create_desc, ufs_create }, /* create */
{ &vop_whiteout_desc, ufs_whiteout }, /* whiteout */
{ &vop_mknod_desc, ufs_mknod }, /* mknod */
{ &vop_open_desc, ufs_open }, /* open */
{ &vop_close_desc, ufs_close }, /* close */
{ &vop_access_desc, ufs_access }, /* access */
{ &vop_getattr_desc, ufs_getattr }, /* getattr */
{ &vop_setattr_desc, ufs_setattr }, /* setattr */
{ &vop_read_desc, ffs_read }, /* read */
{ &vop_write_desc, ffs_write }, /* write */
{ &vop_lease_desc, ufs_lease_check }, /* lease */
{ &vop_ioctl_desc, ufs_ioctl }, /* ioctl */
{ &vop_select_desc, ufs_select }, /* select */
{ &vop_kqfilter_desc, ufs_kqfilter }, /* kqfilter */
{ &vop_revoke_desc, ufs_revoke }, /* revoke */
{ &vop_fsync_desc, ffs_fsync }, /* fsync */
{ &vop_remove_desc, ufs_remove }, /* remove */
{ &vop_link_desc, ufs_link }, /* link */
{ &vop_rename_desc, ufs_rename }, /* rename */
{ &vop_mkdir_desc, ufs_mkdir }, /* mkdir */
{ &vop_rmdir_desc, ufs_rmdir }, /* rmdir */
{ &vop_symlink_desc, ufs_symlink }, /* symlink */
{ &vop_readdir_desc, ufs_readdir }, /* readdir */
{ &vop_readlink_desc, ufs_readlink }, /* readlink */
{ &vop_abortop_desc, vop_generic_abortop }, /* abortop */
{ &vop_inactive_desc, ufs_inactive }, /* inactive */
{ &vop_reclaim_desc, ffs_reclaim }, /* reclaim */
{ &vop_lock_desc, ufs_lock }, /* lock */
{ &vop_unlock_desc, ufs_unlock }, /* unlock */
{ &vop_bmap_desc, ufs_bmap }, /* bmap */
{ &vop_strategy_desc, ufs_strategy }, /* strategy */
{ &vop_print_desc, ufs_print }, /* print */
{ &vop_islocked_desc, ufs_islocked }, /* islocked */
{ &vop_pathconf_desc, ufs_pathconf }, /* pathconf */
{ &vop_advlock_desc, ufs_advlock }, /* advlock */
{ &vop_reallocblks_desc, ffs_reallocblks }, /* reallocblks */
{ &vop_bwrite_desc, vop_generic_bwrite },
#ifdef UFS_EXTATTR
{ &vop_getextattr_desc, ufs_vop_getextattr },
{ &vop_setextattr_desc, ufs_vop_setextattr },
#endif
{ NULL, NULL }
};
struct vnodeopv_desc ffs_vnodeop_opv_desc =
{ &ffs_vnodeop_p, ffs_vnodeop_entries };
int (**ffs_specop_p)(void *);
struct vnodeopv_entry_desc ffs_specop_entries[] = {
{ &vop_default_desc, spec_vnoperate },
{ &vop_close_desc, ufsspec_close }, /* close */
{ &vop_access_desc, ufs_access }, /* access */
{ &vop_getattr_desc, ufs_getattr }, /* getattr */
{ &vop_setattr_desc, ufs_setattr }, /* setattr */
{ &vop_read_desc, ufsspec_read }, /* read */
{ &vop_write_desc, ufsspec_write }, /* write */
{ &vop_fsync_desc, ffs_fsync }, /* fsync */
{ &vop_inactive_desc, ufs_inactive }, /* inactive */
{ &vop_reclaim_desc, ffs_reclaim }, /* reclaim */
{ &vop_lock_desc, ufs_lock }, /* lock */
{ &vop_unlock_desc, ufs_unlock }, /* unlock */
{ &vop_print_desc, ufs_print }, /* print */
{ &vop_islocked_desc, ufs_islocked }, /* islocked */
#ifdef UFS_EXTATTR
{ &vop_getextattr_desc, ufs_vop_getextattr },
{ &vop_setextattr_desc, ufs_vop_setextattr },
#endif
{ NULL, NULL }
};
struct vnodeopv_desc ffs_specop_opv_desc =
{ &ffs_specop_p, ffs_specop_entries };
#ifdef FIFO
int (**ffs_fifoop_p)(void *);
struct vnodeopv_entry_desc ffs_fifoop_entries[] = {
{ &vop_default_desc, fifo_vnoperate },
{ &vop_close_desc, ufsfifo_close }, /* close */
{ &vop_access_desc, ufs_access }, /* access */
{ &vop_getattr_desc, ufs_getattr }, /* getattr */
{ &vop_setattr_desc, ufs_setattr }, /* setattr */
{ &vop_read_desc, ufsfifo_read }, /* read */
{ &vop_write_desc, ufsfifo_write }, /* write */
{ &vop_fsync_desc, ffs_fsync }, /* fsync */
{ &vop_inactive_desc, ufs_inactive }, /* inactive */
{ &vop_reclaim_desc, ffs_reclaim }, /* reclaim */
{ &vop_lock_desc, ufs_lock }, /* lock */
{ &vop_unlock_desc, ufs_unlock }, /* unlock */
{ &vop_print_desc, ufs_print }, /* print */
{ &vop_islocked_desc, ufs_islocked }, /* islocked */
{ &vop_bwrite_desc, vop_generic_bwrite },
#ifdef UFS_EXTATTR
{ &vop_getextattr_desc, ufs_vop_getextattr },
{ &vop_setextattr_desc, ufs_vop_setextattr },
#endif
{ NULL, NULL }
};
struct vnodeopv_desc ffs_fifoop_opv_desc =
{ &ffs_fifoop_p, ffs_fifoop_entries };
#endif /* FIFO */
/*
* Enabling cluster read/write operations.
*/
int doclusterread = 1;
int doclusterwrite = 1;
#include <ufs/ufs/ufs_readwrite.c>
/*
* Synch an open file.
*/
/* ARGSUSED */
int
ffs_fsync(v)
void *v;
{
struct vop_fsync_args /* {
struct vnode *a_vp;
struct ucred *a_cred;
int a_waitfor;
struct proc *a_p;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
struct buf *bp, *nbp;
int s, error, passes, skipmeta;
if (vp->v_type == VBLK &&
vp->v_specmountpoint != NULL &&
(vp->v_specmountpoint->mnt_flag & MNT_SOFTDEP))
softdep_fsync_mountdev(vp);
/*
* Flush all dirty buffers associated with a vnode.
*/
passes = NIADDR + 1;
skipmeta = 0;
if (ap->a_waitfor == MNT_WAIT)
skipmeta = 1;
s = splbio();
loop:
for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp;
bp = LIST_NEXT(bp, b_vnbufs))
bp->b_flags &= ~B_SCANNED;
for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
nbp = LIST_NEXT(bp, b_vnbufs);
/*
* Reasons to skip this buffer: it has already been considered
* on this pass, this pass is the first time through on a
* synchronous flush request and the buffer being considered
* is metadata, the buffer has dependencies that will cause
* it to be redirtied and it has not already been deferred,
* or it is already being written.
*/
if (bp->b_flags & (B_BUSY | B_SCANNED))
continue;
if ((bp->b_flags & B_DELWRI) == 0)
panic("ffs_fsync: not dirty");
if (skipmeta && bp->b_lblkno < 0)
continue;
if (ap->a_waitfor != MNT_WAIT &&
LIST_FIRST(&bp->b_dep) != NULL &&
(bp->b_flags & B_DEFERRED) == 0 &&
buf_countdeps(bp, 0, 1)) {
bp->b_flags |= B_DEFERRED;
continue;
}
bremfree(bp);
bp->b_flags |= B_BUSY | B_SCANNED;
splx(s);
/*
* On our final pass through, do all I/O synchronously
* so that we can find out if our flush is failing
* because of write errors.
*/
if (passes > 0 || ap->a_waitfor != MNT_WAIT)
(void) bawrite(bp);
else if ((error = bwrite(bp)) != 0)
return (error);
s = splbio();
/*
* Since we may have slept during the I/O, we need
* to start from a known point.
*/
nbp = LIST_FIRST(&vp->v_dirtyblkhd);
}
if (skipmeta) {
skipmeta = 0;
goto loop;
}
if (ap->a_waitfor == MNT_WAIT) {
vwaitforio(vp, 0, "ffs_fsync", 0);
/*
* Ensure that any filesystem metadata associated
* with the vnode has been written.
*/
splx(s);
if ((error = softdep_sync_metadata(ap)) != 0)
return (error);
s = splbio();
if (!LIST_EMPTY(&vp->v_dirtyblkhd)) {
/*
* Block devices associated with filesystems may
* have new I/O requests posted for them even if
* the vnode is locked, so no amount of trying will
* get them clean. Thus we give block devices a
* good effort, then just give up. For all other file
* types, go around and try again until it is clean.
*/
if (passes > 0) {
passes -= 1;
goto loop;
}
#ifdef DIAGNOSTIC
if (vp->v_type != VBLK)
vprint("ffs_fsync: dirty", vp);
#endif
}
}
splx(s);
return (UFS_UPDATE(VTOI(vp), ap->a_waitfor == MNT_WAIT));
}
/*
* Reclaim an inode so that it can be used for other purposes.
*/
int
ffs_reclaim(v)
void *v;
{
struct vop_reclaim_args /* {
struct vnode *a_vp;
sturct proc *a_p;
} */ *ap = v;
register struct vnode *vp = ap->a_vp;
int error;
if ((error = ufs_reclaim(vp, ap->a_p)) != 0)
return (error);
/* XXX - same for for both mfs and ffs */
pool_put(&ffs_ino_pool, vp->v_data);
vp->v_data = NULL;
return (0);
}
|