| Current Path : /usr/src/sys/ufs/ufs/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/sys/ufs/ufs/ufs_inode.c |
/*-
* Copyright (c) 1991, 1993, 1995
* 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.
* 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.
*
* @(#)ufs_inode.c 8.9 (Berkeley) 5/14/95
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/ufs/ufs/ufs_inode.c 235626 2012-05-18 19:48:38Z mckusick $");
#include "opt_quota.h"
#include "opt_ufs.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/vnode.h>
#include <sys/lock.h>
#include <sys/mount.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <ufs/ufs/extattr.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ufs/ufs_extern.h>
#ifdef UFS_DIRHASH
#include <ufs/ufs/dir.h>
#include <ufs/ufs/dirhash.h>
#endif
#ifdef UFS_GJOURNAL
#include <ufs/ufs/gjournal.h>
#endif
/*
* Last reference to an inode. If necessary, write or delete it.
*/
int
ufs_inactive(ap)
struct vop_inactive_args /* {
struct vnode *a_vp;
struct thread *a_td;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct inode *ip = VTOI(vp);
struct thread *td = ap->a_td;
mode_t mode;
int error = 0;
off_t isize;
struct mount *mp;
mp = NULL;
/*
* Ignore inodes related to stale file handles.
*/
if (ip->i_mode == 0)
goto out;
#ifdef UFS_GJOURNAL
ufs_gjournal_close(vp);
#endif
#ifdef QUOTA
/*
* Before moving off the active list, we must be sure that
* any modified quotas have been pushed since these will no
* longer be checked once the vnode is on the inactive list.
*/
qsyncvp(vp);
#endif
if ((ip->i_effnlink == 0 && DOINGSOFTDEP(vp)) ||
(ip->i_nlink <= 0 && !UFS_RDONLY(ip))) {
loop:
if (vn_start_secondary_write(vp, &mp, V_NOWAIT) != 0) {
/* Cannot delete file while file system is suspended */
if ((vp->v_iflag & VI_DOOMED) != 0) {
/* Cannot return before file is deleted */
(void) vn_start_secondary_write(vp, &mp,
V_WAIT);
} else {
MNT_ILOCK(mp);
if ((mp->mnt_kern_flag &
(MNTK_SUSPEND2 | MNTK_SUSPENDED)) == 0) {
MNT_IUNLOCK(mp);
goto loop;
}
/*
* Fail to inactivate vnode now and
* let ffs_snapshot() clean up after
* it has resumed the file system.
*/
VI_LOCK(vp);
vp->v_iflag |= VI_OWEINACT;
VI_UNLOCK(vp);
MNT_IUNLOCK(mp);
return (0);
}
}
}
isize = ip->i_size;
if (ip->i_ump->um_fstype == UFS2)
isize += ip->i_din2->di_extsize;
if (ip->i_effnlink <= 0 && isize && !UFS_RDONLY(ip))
error = UFS_TRUNCATE(vp, (off_t)0, IO_EXT | IO_NORMAL,
NOCRED, td);
if (ip->i_nlink <= 0 && ip->i_mode && !UFS_RDONLY(ip)) {
#ifdef QUOTA
if (!getinoquota(ip))
(void)chkiq(ip, -1, NOCRED, FORCE);
#endif
#ifdef UFS_EXTATTR
ufs_extattr_vnode_inactive(vp, td);
#endif
/*
* Setting the mode to zero needs to wait for the inode
* to be written just as does a change to the link count.
* So, rather than creating a new entry point to do the
* same thing, we just use softdep_change_linkcnt().
*/
DIP_SET(ip, i_rdev, 0);
mode = ip->i_mode;
ip->i_mode = 0;
DIP_SET(ip, i_mode, 0);
ip->i_flag |= IN_CHANGE | IN_UPDATE;
if (DOINGSOFTDEP(vp))
softdep_change_linkcnt(ip);
UFS_VFREE(vp, ip->i_number, mode);
}
if (ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) {
if ((ip->i_flag & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) == 0 &&
mp == NULL &&
vn_start_secondary_write(vp, &mp, V_NOWAIT)) {
mp = NULL;
ip->i_flag &= ~IN_ACCESS;
} else {
if (mp == NULL)
(void) vn_start_secondary_write(vp, &mp,
V_WAIT);
UFS_UPDATE(vp, 0);
}
}
out:
/*
* If we are done with the inode, reclaim it
* so that it can be reused immediately.
*/
if (ip->i_mode == 0)
vrecycle(vp, td);
if (mp != NULL)
vn_finished_secondary_write(mp);
return (error);
}
void
ufs_prepare_reclaim(struct vnode *vp)
{
struct inode *ip;
#ifdef QUOTA
int i;
#endif
ip = VTOI(vp);
vnode_destroy_vobject(vp);
#ifdef QUOTA
for (i = 0; i < MAXQUOTAS; i++) {
if (ip->i_dquot[i] != NODQUOT) {
dqrele(vp, ip->i_dquot[i]);
ip->i_dquot[i] = NODQUOT;
}
}
#endif
#ifdef UFS_DIRHASH
if (ip->i_dirhash != NULL)
ufsdirhash_free(ip);
#endif
}
/*
* Reclaim an inode so that it can be used for other purposes.
*/
int
ufs_reclaim(ap)
struct vop_reclaim_args /* {
struct vnode *a_vp;
struct thread *a_td;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct inode *ip = VTOI(vp);
struct ufsmount *ump = ip->i_ump;
ufs_prepare_reclaim(vp);
if (ip->i_flag & IN_LAZYMOD)
ip->i_flag |= IN_MODIFIED;
UFS_UPDATE(vp, 0);
/*
* Remove the inode from its hash chain.
*/
vfs_hash_remove(vp);
/*
* Lock the clearing of v_data so ffs_lock() can inspect it
* prior to obtaining the lock.
*/
VI_LOCK(vp);
vp->v_data = 0;
VI_UNLOCK(vp);
UFS_IFREE(ump, ip);
return (0);
}