ufs_gjournal.c revision 177983 
1/*-
2 * Copyright (c) 2005-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/ufs/ufs/ufs_gjournal.c 177983 2008-04-07 18:12:37Z pjd $");
29
30#include "opt_ufs.h"
31
32#ifdef UFS_GJOURNAL
33
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/kernel.h>
37#include <sys/vnode.h>
38#include <sys/lock.h>
39#include <sys/mount.h>
40#include <sys/mutex.h>
41
42#include <ufs/ufs/extattr.h>
43#include <ufs/ufs/quota.h>
44#include <ufs/ufs/inode.h>
45#include <ufs/ufs/ufsmount.h>
46#include <ufs/ufs/gjournal.h>
47
48#include <ufs/ffs/fs.h>
49#include <ufs/ffs/ffs_extern.h>
50
51/*
52 * Change the number of unreferenced inodes.
53 */
54static int
55ufs_gjournal_modref(struct vnode *vp, int count)
56{
57	struct cg *cgp;
58	struct buf *bp;
59	ufs2_daddr_t cgbno;
60	int error, cg;
61	struct cdev *dev;
62	struct inode *ip;
63	struct ufsmount *ump;
64	struct fs *fs;
65	struct vnode *devvp;
66	ino_t ino;
67
68	ip = VTOI(vp);
69	ump = ip->i_ump;
70	fs = ip->i_fs;
71	devvp = ip->i_devvp;
72	ino = ip->i_number;
73
74	cg = ino_to_cg(fs, ino);
75	if (devvp->v_type != VCHR) {
76		/* devvp is a snapshot */
77		dev = VTOI(devvp)->i_devvp->v_rdev;
78		cgbno = fragstoblks(fs, cgtod(fs, cg));
79	} else {
80		/* devvp is a normal disk device */
81		dev = devvp->v_rdev;
82		cgbno = fsbtodb(fs, cgtod(fs, cg));
83	}
84	if ((u_int)ino >= fs->fs_ipg * fs->fs_ncg)
85		panic("ufs_gjournal_modref: range: dev = %s, ino = %lu, fs = %s",
86		    devtoname(dev), (u_long)ino, fs->fs_fsmnt);
87	if ((error = bread(devvp, cgbno, (int)fs->fs_cgsize, NOCRED, &bp))) {
88		brelse(bp);
89		return (error);
90	}
91	cgp = (struct cg *)bp->b_data;
92	if (!cg_chkmagic(cgp)) {
93		brelse(bp);
94		return (0);
95	}
96	bp->b_xflags |= BX_BKGRDWRITE;
97	cgp->cg_unrefs += count;
98	UFS_LOCK(ump);
99	fs->fs_unrefs += count;
100	fs->fs_fmod = 1;
101	ACTIVECLEAR(fs, cg);
102	UFS_UNLOCK(ump);
103	bdwrite(bp);
104	return (0);
105}
106
107void
108ufs_gjournal_orphan(struct vnode *vp)
109{
110	struct inode *ip;
111
112	if (vp->v_mount->mnt_gjprovider == NULL)
113		return;
114	if (vp->v_usecount < 2 || (vp->v_vflag & VV_DELETED))
115		return;
116	ip = VTOI(vp);
117	if ((vp->v_type == VDIR && ip->i_nlink > 2) ||
118	    (vp->v_type != VDIR && ip->i_nlink > 1)) {
119		return;
120	}
121	vp->v_vflag |= VV_DELETED;
122
123	ufs_gjournal_modref(vp, 1);
124}
125
126void
127ufs_gjournal_close(struct vnode *vp)
128{
129	struct inode *ip;
130
131	if (vp->v_mount->mnt_gjprovider == NULL)
132		return;
133	if (!(vp->v_vflag & VV_DELETED))
134		return;
135	ip = VTOI(vp);
136	if (ip->i_nlink > 0)
137		return;
138	ufs_gjournal_modref(vp, -1);
139}
140
141#endif /* UFS_GJOURNAL */
142