ufs_gjournal.c revision 306630 
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: stable/10/sys/ufs/ufs/ufs_gjournal.c 306630 2016-10-03 10:15:16Z kib $");
29
30#include "opt_ufs.h"
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/kernel.h>
35#include <sys/vnode.h>
36#include <sys/lock.h>
37#include <sys/mount.h>
38#include <sys/mutex.h>
39
40#include <ufs/ufs/extattr.h>
41#include <ufs/ufs/quota.h>
42#include <ufs/ufs/inode.h>
43#include <ufs/ufs/ufsmount.h>
44#include <ufs/ufs/gjournal.h>
45
46#include <ufs/ffs/fs.h>
47#include <ufs/ffs/ffs_extern.h>
48
49/*
50 * Change the number of unreferenced inodes.
51 */
52static int
53ufs_gjournal_modref(struct vnode *vp, int count)
54{
55	struct cg *cgp;
56	struct buf *bp;
57	ufs2_daddr_t cgbno;
58	int error, cg;
59	struct cdev *dev;
60	struct inode *ip;
61	struct ufsmount *ump;
62	struct fs *fs;
63	struct vnode *devvp;
64	ino_t ino;
65
66	ip = VTOI(vp);
67	ump = ip->i_ump;
68	fs = ip->i_fs;
69	devvp = ip->i_devvp;
70	ino = ip->i_number;
71
72	cg = ino_to_cg(fs, ino);
73	if (devvp->v_type == VREG) {
74		/* devvp is a snapshot */
75		dev = VTOI(devvp)->i_devvp->v_rdev;
76		cgbno = fragstoblks(fs, cgtod(fs, cg));
77	} else if (devvp->v_type == VCHR) {
78		/* devvp is a normal disk device */
79		dev = devvp->v_rdev;
80		cgbno = fsbtodb(fs, cgtod(fs, cg));
81	} else {
82		bp = NULL;
83		return (EIO);
84	}
85	if ((u_int)ino >= fs->fs_ipg * fs->fs_ncg)
86		panic("ufs_gjournal_modref: range: dev = %s, ino = %lu, fs = %s",
87		    devtoname(dev), (u_long)ino, fs->fs_fsmnt);
88	if ((error = bread(devvp, cgbno, (int)fs->fs_cgsize, NOCRED, &bp))) {
89		brelse(bp);
90		return (error);
91	}
92	cgp = (struct cg *)bp->b_data;
93	if (!cg_chkmagic(cgp)) {
94		brelse(bp);
95		return (0);
96	}
97	bp->b_xflags |= BX_BKGRDWRITE;
98	cgp->cg_unrefs += count;
99	UFS_LOCK(ump);
100	fs->fs_unrefs += count;
101	fs->fs_fmod = 1;
102	ACTIVECLEAR(fs, cg);
103	UFS_UNLOCK(ump);
104	bdwrite(bp);
105	return (0);
106}
107
108void
109ufs_gjournal_orphan(struct vnode *vp)
110{
111	struct inode *ip;
112
113	if (vp->v_mount->mnt_gjprovider == NULL)
114		return;
115	if (vp->v_usecount < 2 || (vp->v_vflag & VV_DELETED))
116		return;
117	ip = VTOI(vp);
118	if ((vp->v_type == VDIR && ip->i_nlink > 2) ||
119	    (vp->v_type != VDIR && ip->i_nlink > 1)) {
120		return;
121	}
122	vp->v_vflag |= VV_DELETED;
123
124	ufs_gjournal_modref(vp, 1);
125}
126
127void
128ufs_gjournal_close(struct vnode *vp)
129{
130	struct inode *ip;
131
132	if (vp->v_mount->mnt_gjprovider == NULL)
133		return;
134	if (!(vp->v_vflag & VV_DELETED))
135		return;
136	ip = VTOI(vp);
137	if (ip->i_nlink > 0)
138		return;
139	ufs_gjournal_modref(vp, -1);
140}
141