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File: [cvs.NetBSD.org] / src / sys / ufs / ffs / ffs_vnops.c (download)

Revision 1.129, Fri May 26 14:21:02 2017 UTC (17 months, 3 weeks ago) by riastradh
Branch: MAIN
CVS Tags: tls-maxphys-base-20171202, phil-wifi-base, phil-wifi, pgoyette-compat-base, pgoyette-compat-1020, pgoyette-compat-0930, pgoyette-compat-0906, pgoyette-compat-0728, pgoyette-compat-0625, pgoyette-compat-0521, pgoyette-compat-0502, pgoyette-compat-0422, pgoyette-compat-0415, pgoyette-compat-0407, pgoyette-compat-0330, pgoyette-compat-0322, pgoyette-compat-0315, pgoyette-compat, perseant-stdc-iso10646-base, perseant-stdc-iso10646, nick-nhusb-base-20170825, netbsd-8-base, netbsd-8-0-RELEASE, netbsd-8-0-RC2, netbsd-8-0-RC1, netbsd-8, matt-nb8-mediatek-base, matt-nb8-mediatek, HEAD
Changes since 1.128: +5 -3 lines

Make VOP_RECLAIM do the last unlock of the vnode.

VOP_RECLAIM naturally has exclusive access to the vnode, so having it
locked on entry is not strictly necessary -- but it means if there
are any final operations that must be done on the vnode, such as
ffs_update, requiring exclusive access to it, we can now kassert that
the vnode is locked in those operations.

We can't just have the caller release the last lock because some file
systems don't use genfs_lock, and require the vnode to remain valid
for VOP_UNLOCK to work, notably unionfs.

/*	$NetBSD: ffs_vnops.c,v 1.129 2017/05/26 14:21:02 riastradh Exp $	*/

/*-
 * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Wasabi Systems, Inc, and by Andrew Doran.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

/*
 * 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. 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	8.15 (Berkeley) 5/14/95
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ffs_vnops.c,v 1.129 2017/05/26 14:21:02 riastradh Exp $");

#if defined(_KERNEL_OPT)
#include "opt_ffs.h"
#include "opt_wapbl.h"
#endif

#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/event.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <sys/pool.h>
#include <sys/signalvar.h>
#include <sys/kauth.h>
#include <sys/wapbl.h>

#include <miscfs/fifofs/fifo.h>
#include <miscfs/genfs/genfs.h>
#include <miscfs/specfs/specdev.h>

#include <ufs/ufs/inode.h>
#include <ufs/ufs/dir.h>
#include <ufs/ufs/ufs_extern.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ufs/ufs_wapbl.h>

#include <ufs/ffs/fs.h>
#include <ufs/ffs/ffs_extern.h>

#include <uvm/uvm.h>

/* Global vfs data structures for ufs. */
int (**ffs_vnodeop_p)(void *);
const 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_fallocate_desc, genfs_eopnotsupp },	/* fallocate */
	{ &vop_fdiscard_desc, genfs_eopnotsupp },	/* fdiscard */
	{ &vop_ioctl_desc, ufs_ioctl },			/* ioctl */
	{ &vop_fcntl_desc, ufs_fcntl },			/* fcntl */
	{ &vop_poll_desc, ufs_poll },			/* poll */
	{ &vop_kqfilter_desc, genfs_kqfilter },		/* kqfilter */
	{ &vop_revoke_desc, ufs_revoke },		/* revoke */
	{ &vop_mmap_desc, ufs_mmap },			/* mmap */
	{ &vop_fsync_desc, ffs_fsync },			/* fsync */
	{ &vop_seek_desc, ufs_seek },			/* seek */
	{ &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, ufs_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_bwrite_desc, vn_bwrite },		/* bwrite */
	{ &vop_getpages_desc, genfs_getpages },		/* getpages */
	{ &vop_putpages_desc, genfs_putpages },		/* putpages */
	{ &vop_openextattr_desc, ffs_openextattr },	/* openextattr */
	{ &vop_closeextattr_desc, ffs_closeextattr },	/* closeextattr */
	{ &vop_getextattr_desc, ffs_getextattr },	/* getextattr */
	{ &vop_setextattr_desc, ffs_setextattr },	/* setextattr */
	{ &vop_listextattr_desc, ffs_listextattr },	/* listextattr */
	{ &vop_deleteextattr_desc, ffs_deleteextattr },	/* deleteextattr */
	{ NULL, NULL }
};
const struct vnodeopv_desc ffs_vnodeop_opv_desc =
	{ &ffs_vnodeop_p, ffs_vnodeop_entries };

int (**ffs_specop_p)(void *);
const struct vnodeopv_entry_desc ffs_specop_entries[] = {
	{ &vop_default_desc, vn_default_error },
	{ &vop_lookup_desc, spec_lookup },		/* lookup */
	{ &vop_create_desc, spec_create },		/* create */
	{ &vop_mknod_desc, spec_mknod },		/* mknod */
	{ &vop_open_desc, spec_open },			/* open */
	{ &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_fallocate_desc, spec_fallocate },	/* fallocate */
	{ &vop_fdiscard_desc, spec_fdiscard },		/* fdiscard */
	{ &vop_ioctl_desc, spec_ioctl },		/* ioctl */
	{ &vop_fcntl_desc, ufs_fcntl },			/* fcntl */
	{ &vop_poll_desc, spec_poll },			/* poll */
	{ &vop_kqfilter_desc, spec_kqfilter },		/* kqfilter */
	{ &vop_revoke_desc, spec_revoke },		/* revoke */
	{ &vop_mmap_desc, spec_mmap },			/* mmap */
	{ &vop_fsync_desc, ffs_spec_fsync },		/* fsync */
	{ &vop_seek_desc, spec_seek },			/* seek */
	{ &vop_remove_desc, spec_remove },		/* remove */
	{ &vop_link_desc, spec_link },			/* link */
	{ &vop_rename_desc, spec_rename },		/* rename */
	{ &vop_mkdir_desc, spec_mkdir },		/* mkdir */
	{ &vop_rmdir_desc, spec_rmdir },		/* rmdir */
	{ &vop_symlink_desc, spec_symlink },		/* symlink */
	{ &vop_readdir_desc, spec_readdir },		/* readdir */
	{ &vop_readlink_desc, spec_readlink },		/* readlink */
	{ &vop_abortop_desc, spec_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, spec_bmap },			/* bmap */
	{ &vop_strategy_desc, spec_strategy },		/* strategy */
	{ &vop_print_desc, ufs_print },			/* print */
	{ &vop_islocked_desc, ufs_islocked },		/* islocked */
	{ &vop_pathconf_desc, spec_pathconf },		/* pathconf */
	{ &vop_advlock_desc, spec_advlock },		/* advlock */
	{ &vop_bwrite_desc, vn_bwrite },		/* bwrite */
	{ &vop_getpages_desc, spec_getpages },		/* getpages */
	{ &vop_putpages_desc, spec_putpages },		/* putpages */
	{ &vop_openextattr_desc, ffs_openextattr },	/* openextattr */
	{ &vop_closeextattr_desc, ffs_closeextattr },	/* closeextattr */
	{ &vop_getextattr_desc, ffs_getextattr },	/* getextattr */
	{ &vop_setextattr_desc, ffs_setextattr },	/* setextattr */
	{ &vop_listextattr_desc, ffs_listextattr },	/* listextattr */
	{ &vop_deleteextattr_desc, ffs_deleteextattr },	/* deleteextattr */
	{ NULL, NULL }
};
const struct vnodeopv_desc ffs_specop_opv_desc =
	{ &ffs_specop_p, ffs_specop_entries };

int (**ffs_fifoop_p)(void *);
const struct vnodeopv_entry_desc ffs_fifoop_entries[] = {
	{ &vop_default_desc, vn_default_error },
	{ &vop_lookup_desc, vn_fifo_bypass },		/* lookup */
	{ &vop_create_desc, vn_fifo_bypass },		/* create */
	{ &vop_mknod_desc, vn_fifo_bypass },		/* mknod */
	{ &vop_open_desc, vn_fifo_bypass },		/* open */
	{ &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_fallocate_desc, vn_fifo_bypass },	/* fallocate */
	{ &vop_fdiscard_desc, vn_fifo_bypass },		/* fdiscard */
	{ &vop_ioctl_desc, vn_fifo_bypass },		/* ioctl */
	{ &vop_fcntl_desc, ufs_fcntl },			/* fcntl */
	{ &vop_poll_desc, vn_fifo_bypass },		/* poll */
	{ &vop_kqfilter_desc, vn_fifo_bypass },		/* kqfilter */
	{ &vop_revoke_desc, vn_fifo_bypass },		/* revoke */
	{ &vop_mmap_desc, vn_fifo_bypass },		/* mmap */
	{ &vop_fsync_desc, ffs_fsync },			/* fsync */
	{ &vop_seek_desc, vn_fifo_bypass },		/* seek */
	{ &vop_remove_desc, vn_fifo_bypass },		/* remove */
	{ &vop_link_desc, vn_fifo_bypass },		/* link */
	{ &vop_rename_desc, vn_fifo_bypass },		/* rename */
	{ &vop_mkdir_desc, vn_fifo_bypass },		/* mkdir */
	{ &vop_rmdir_desc, vn_fifo_bypass },		/* rmdir */
	{ &vop_symlink_desc, vn_fifo_bypass },		/* symlink */
	{ &vop_readdir_desc, vn_fifo_bypass },		/* readdir */
	{ &vop_readlink_desc, vn_fifo_bypass },		/* readlink */
	{ &vop_abortop_desc, vn_fifo_bypass },		/* 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, vn_fifo_bypass },		/* bmap */
	{ &vop_strategy_desc, vn_fifo_bypass },		/* strategy */
	{ &vop_print_desc, ufs_print },			/* print */
	{ &vop_islocked_desc, ufs_islocked },		/* islocked */
	{ &vop_pathconf_desc, vn_fifo_bypass },		/* pathconf */
	{ &vop_advlock_desc, vn_fifo_bypass },		/* advlock */
	{ &vop_bwrite_desc, vn_bwrite },		/* bwrite */
	{ &vop_putpages_desc, vn_fifo_bypass }, 	/* putpages */
	{ &vop_openextattr_desc, ffs_openextattr },	/* openextattr */
	{ &vop_closeextattr_desc, ffs_closeextattr },	/* closeextattr */
	{ &vop_getextattr_desc, ffs_getextattr },	/* getextattr */
	{ &vop_setextattr_desc, ffs_setextattr },	/* setextattr */
	{ &vop_listextattr_desc, ffs_listextattr },	/* listextattr */
	{ &vop_deleteextattr_desc, ffs_deleteextattr },	/* deleteextattr */
	{ NULL, NULL }
};
const struct vnodeopv_desc ffs_fifoop_opv_desc =
	{ &ffs_fifoop_p, ffs_fifoop_entries };

#include <ufs/ufs/ufs_readwrite.c>

int
ffs_spec_fsync(void *v)
{
	struct vop_fsync_args /* {
		struct vnode *a_vp;
		kauth_cred_t a_cred;
		int a_flags;
		off_t a_offlo;
		off_t a_offhi;
		struct lwp *a_l;
	} */ *ap = v;
	int error, flags, uflags;
	struct vnode *vp;

	flags = ap->a_flags;
	uflags = UPDATE_CLOSE | ((flags & FSYNC_WAIT) ? UPDATE_WAIT : 0);
	vp = ap->a_vp;

	error = spec_fsync(v);
	if (error)
		goto out;

#ifdef WAPBL
	struct mount *mp = vp->v_mount;

	if (mp && mp->mnt_wapbl) {
		/*
		 * Don't bother writing out metadata if the syncer is
		 * making the request.  We will let the sync vnode
		 * write it out in a single burst through a call to
		 * VFS_SYNC().
		 */
		if ((flags & (FSYNC_DATAONLY | FSYNC_LAZY)) != 0)
			goto out;
		if ((VTOI(vp)->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE
		    | IN_MODIFY | IN_MODIFIED | IN_ACCESSED)) != 0) {
			error = UFS_WAPBL_BEGIN(mp);
			if (error != 0)
				goto out;
			error = ffs_update(vp, NULL, NULL, uflags);
			UFS_WAPBL_END(mp);
		}
		goto out;
	}
#endif /* WAPBL */

	error = ffs_update(vp, NULL, NULL, uflags);

out:
	return error;
}

int
ffs_fsync(void *v)
{
	struct vop_fsync_args /* {
		struct vnode *a_vp;
		kauth_cred_t a_cred;
		int a_flags;
		off_t a_offlo;
		off_t a_offhi;
		struct lwp *a_l;
	} */ *ap = v;
	struct buf *bp;
	int num, error, i;
	struct indir ia[UFS_NIADDR + 1];
	int bsize;
	daddr_t blk_high;
	struct vnode *vp;
	struct mount *mp;

	vp = ap->a_vp;
	mp = vp->v_mount;

	if ((ap->a_offlo == 0 && ap->a_offhi == 0) || (vp->v_type != VREG)) {
		error = ffs_full_fsync(vp, ap->a_flags);
		goto out;
	}

	bsize = mp->mnt_stat.f_iosize;
	blk_high = ap->a_offhi / bsize;
	if (ap->a_offhi % bsize != 0)
		blk_high++;

	/*
	 * First, flush all pages in range.
	 */

	mutex_enter(vp->v_interlock);
	error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo),
	    round_page(ap->a_offhi), PGO_CLEANIT |
	    ((ap->a_flags & FSYNC_WAIT) ? PGO_SYNCIO : 0));
	if (error) {
		goto out;
	}

#ifdef WAPBL
	KASSERT(vp->v_type == VREG);
	if (mp->mnt_wapbl) {
		/*
		 * Don't bother writing out metadata if the syncer is
		 * making the request.  We will let the sync vnode
		 * write it out in a single burst through a call to
		 * VFS_SYNC().
		 */
		if ((ap->a_flags & (FSYNC_DATAONLY | FSYNC_LAZY)) != 0) {
			return 0;
		}
		error = 0;
		if (vp->v_tag == VT_UFS && VTOI(vp)->i_flag &
		    (IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY |
				 IN_MODIFIED | IN_ACCESSED)) {
			error = UFS_WAPBL_BEGIN(mp);
			if (error) {
				return error;
			}
			error = ffs_update(vp, NULL, NULL, UPDATE_CLOSE |
			    ((ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0));
			UFS_WAPBL_END(mp);
		}
		if (error || (ap->a_flags & FSYNC_NOLOG) != 0) {
			return error;
		}
		error = wapbl_flush(mp->mnt_wapbl, 0);
		return error;
	}
#endif /* WAPBL */

	/*
	 * Then, flush indirect blocks.
	 */

	if (blk_high >= UFS_NDADDR) {
		error = ufs_getlbns(vp, blk_high, ia, &num);
		if (error)
			goto out;

		mutex_enter(&bufcache_lock);
		for (i = 0; i < num; i++) {
			if ((bp = incore(vp, ia[i].in_lbn)) == NULL)
				continue;
			if ((bp->b_cflags & BC_BUSY) != 0 ||
			    (bp->b_oflags & BO_DELWRI) == 0)
				continue;
			bp->b_cflags |= BC_BUSY | BC_VFLUSH;
			mutex_exit(&bufcache_lock);
			bawrite(bp);
			mutex_enter(&bufcache_lock);
		}
		mutex_exit(&bufcache_lock);
	}

	if (ap->a_flags & FSYNC_WAIT) {
		mutex_enter(vp->v_interlock);
		while (vp->v_numoutput > 0)
			cv_wait(&vp->v_cv, vp->v_interlock);
		mutex_exit(vp->v_interlock);
	}

	error = ffs_update(vp, NULL, NULL, UPDATE_CLOSE |
	    (((ap->a_flags & (FSYNC_WAIT | FSYNC_DATAONLY)) == FSYNC_WAIT)
	    ? UPDATE_WAIT : 0));

	if (error == 0 && ap->a_flags & FSYNC_CACHE) {
		int l = 0;
		VOP_IOCTL(VTOI(vp)->i_devvp, DIOCCACHESYNC, &l, FWRITE,
			curlwp->l_cred);
	}

out:
	return error;
}

/*
 * Synch an open file.  Called for VOP_FSYNC().
 */
/* ARGSUSED */
int
ffs_full_fsync(struct vnode *vp, int flags)
{
	int error, i, uflags;

	KASSERT(vp->v_tag == VT_UFS);
	KASSERT(VTOI(vp) != NULL);
	KASSERT(vp->v_type != VCHR && vp->v_type != VBLK);

	uflags = UPDATE_CLOSE | ((flags & FSYNC_WAIT) ? UPDATE_WAIT : 0);

#ifdef WAPBL
	struct mount *mp = vp->v_mount;

	if (mp && mp->mnt_wapbl) {

		/*
		 * Flush all dirty data associated with the vnode.
		 */
		if (vp->v_type == VREG) {
			int pflags = PGO_ALLPAGES | PGO_CLEANIT;

			if ((flags & FSYNC_LAZY))
				pflags |= PGO_LAZY;
			if ((flags & FSYNC_WAIT))
				pflags |= PGO_SYNCIO;
			mutex_enter(vp->v_interlock);
			error = VOP_PUTPAGES(vp, 0, 0, pflags);
			if (error)
				return error;
		}

		/*
		 * Don't bother writing out metadata if the syncer is
		 * making the request.  We will let the sync vnode
		 * write it out in a single burst through a call to
		 * VFS_SYNC().
		 */
		if ((flags & (FSYNC_DATAONLY | FSYNC_LAZY)) != 0)
			return 0;

		if ((VTOI(vp)->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE
		    | IN_MODIFY | IN_MODIFIED | IN_ACCESSED)) != 0) {
			error = UFS_WAPBL_BEGIN(mp);
			if (error)
				return error;
			error = ffs_update(vp, NULL, NULL, uflags);
			UFS_WAPBL_END(mp);
		} else {
			error = 0;
		}
		if (error || (flags & FSYNC_NOLOG) != 0)
			return error;

		/*
		 * Don't flush the log if the vnode being flushed
		 * contains no dirty buffers that could be in the log.
		 */
		if (!LIST_EMPTY(&vp->v_dirtyblkhd)) {
			error = wapbl_flush(mp->mnt_wapbl, 0);
			if (error)
				return error;
		}

		if ((flags & FSYNC_WAIT) != 0) {
			mutex_enter(vp->v_interlock);
			while (vp->v_numoutput != 0)
				cv_wait(&vp->v_cv, vp->v_interlock);
			mutex_exit(vp->v_interlock);
		}

		return error;
	}
#endif /* WAPBL */

	error = vflushbuf(vp, flags);
	if (error == 0)
		error = ffs_update(vp, NULL, NULL, uflags);
	if (error == 0 && (flags & FSYNC_CACHE) != 0) {
		i = 1;
		(void)VOP_IOCTL(VTOI(vp)->i_devvp, DIOCCACHESYNC, &i, FWRITE,
		    kauth_cred_get());
	}

	return error;
}

/*
 * Reclaim an inode so that it can be used for other purposes.
 */
int
ffs_reclaim(void *v)
{
	struct vop_reclaim_v2_args /* {
		struct vnode *a_vp;
		struct lwp *a_l;
	} */ *ap = v;
	struct vnode *vp = ap->a_vp;
	struct inode *ip = VTOI(vp);
	struct mount *mp = vp->v_mount;
	struct ufsmount *ump = ip->i_ump;
	void *data;
	int error;

	VOP_UNLOCK(vp);

	/*
	 * The inode must be freed and updated before being removed
	 * from its hash chain.  Other threads trying to gain a hold
	 * or lock on the inode will be stalled.
	 */
	error = UFS_WAPBL_BEGIN(mp);
	if (error) {
		return error;
	}
	if (ip->i_nlink <= 0 && ip->i_omode != 0 &&
	    (vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
		ffs_vfree(vp, ip->i_number, ip->i_omode);
	UFS_WAPBL_END(mp);
	if ((error = ufs_reclaim(vp)) != 0) {
		return (error);
	}
	if (ip->i_din.ffs1_din != NULL) {
		if (ump->um_fstype == UFS1)
			pool_cache_put(ffs_dinode1_cache, ip->i_din.ffs1_din);
		else
			pool_cache_put(ffs_dinode2_cache, ip->i_din.ffs2_din);
	}
	/*
	 * To interlock with ffs_sync().
	 */
	genfs_node_destroy(vp);
	mutex_enter(vp->v_interlock);
	data = vp->v_data;
	vp->v_data = NULL;
	mutex_exit(vp->v_interlock);

	/*
	 * XXX MFS ends up here, too, to free an inode.  Should we create
	 * XXX a separate pool for MFS inodes?
	 */
	pool_cache_put(ffs_inode_cache, data);
	return (0);
}

/*
 * Return the last logical file offset that should be written for this file
 * if we're doing a write that ends at "size".
 */

void
ffs_gop_size(struct vnode *vp, off_t size, off_t *eobp, int flags)
{
	struct inode *ip = VTOI(vp);
	struct fs *fs = ip->i_fs;
	daddr_t olbn, nlbn;

	olbn = ffs_lblkno(fs, ip->i_size);
	nlbn = ffs_lblkno(fs, size);
	if (nlbn < UFS_NDADDR && olbn <= nlbn) {
		*eobp = ffs_fragroundup(fs, size);
	} else {
		*eobp = ffs_blkroundup(fs, size);
	}
}

int
ffs_openextattr(void *v)
{
	struct vop_openextattr_args /* {
		struct vnode *a_vp;
		kauth_cred_t a_cred;
		struct proc *a_p;
	} */ *ap = v;
	struct inode *ip = VTOI(ap->a_vp);
	struct fs *fs = ip->i_fs;

	/* Not supported for UFS1 file systems. */
	if (fs->fs_magic == FS_UFS1_MAGIC)
		return (EOPNOTSUPP);

	/* XXX Not implemented for UFS2 file systems. */
	return (EOPNOTSUPP);
}

int
ffs_closeextattr(void *v)
{
	struct vop_closeextattr_args /* {
		struct vnode *a_vp;
		int a_commit;
		kauth_cred_t a_cred;
		struct proc *a_p;
	} */ *ap = v;
	struct inode *ip = VTOI(ap->a_vp);
	struct fs *fs = ip->i_fs;

	/* Not supported for UFS1 file systems. */
	if (fs->fs_magic == FS_UFS1_MAGIC)
		return (EOPNOTSUPP);

	/* XXX Not implemented for UFS2 file systems. */
	return (EOPNOTSUPP);
}

int
ffs_getextattr(void *v)
{
	struct vop_getextattr_args /* {
		struct vnode *a_vp;
		int a_attrnamespace;
		const char *a_name;
		struct uio *a_uio;
		size_t *a_size;
		kauth_cred_t a_cred;
		struct proc *a_p;
	} */ *ap = v;
	struct vnode *vp = ap->a_vp;
	struct inode *ip = VTOI(vp);
	struct fs *fs = ip->i_fs;

	if (fs->fs_magic == FS_UFS1_MAGIC) {
#ifdef UFS_EXTATTR
		int error;

		error = ufs_getextattr(ap);
		return error;
#else
		return (EOPNOTSUPP);
#endif
	}

	/* XXX Not implemented for UFS2 file systems. */
	return (EOPNOTSUPP);
}

int
ffs_setextattr(void *v)
{
	struct vop_setextattr_args /* {
		struct vnode *a_vp;
		int a_attrnamespace;
		const char *a_name;
		struct uio *a_uio;
		kauth_cred_t a_cred;
		struct proc *a_p;
	} */ *ap = v;
	struct vnode *vp = ap->a_vp;
	struct inode *ip = VTOI(vp);
	struct fs *fs = ip->i_fs;

	if (fs->fs_magic == FS_UFS1_MAGIC) {
#ifdef UFS_EXTATTR
		int error;

		error = ufs_setextattr(ap);
		return error;
#else
		return (EOPNOTSUPP);
#endif
	}

	/* XXX Not implemented for UFS2 file systems. */
	return (EOPNOTSUPP);
}

int
ffs_listextattr(void *v)
{
	struct vop_listextattr_args /* {
		struct vnode *a_vp;
		int a_attrnamespace;
		struct uio *a_uio;
		size_t *a_size;
		kauth_cred_t a_cred;
		struct proc *a_p;
	} */ *ap = v;
	struct inode *ip = VTOI(ap->a_vp);
	struct fs *fs = ip->i_fs;

	if (fs->fs_magic == FS_UFS1_MAGIC) {
#ifdef UFS_EXTATTR
		int error;

		error = ufs_listextattr(ap);
		return error;
#else
		return (EOPNOTSUPP);
#endif
	}

	/* XXX Not implemented for UFS2 file systems. */
	return (EOPNOTSUPP);
}

int
ffs_deleteextattr(void *v)
{
	struct vop_deleteextattr_args /* {
		struct vnode *a_vp;
		int a_attrnamespace;
		kauth_cred_t a_cred;
		struct proc *a_p;
	} */ *ap = v;
	struct vnode *vp = ap->a_vp;
	struct inode *ip = VTOI(vp);
	struct fs *fs = ip->i_fs;

	if (fs->fs_magic == FS_UFS1_MAGIC) {
#ifdef UFS_EXTATTR
		int error;

		error = ufs_deleteextattr(ap);
		return error;
#else
		return (EOPNOTSUPP);
#endif
	}

	/* XXX Not implemented for UFS2 file systems. */
	return (EOPNOTSUPP);
}