1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
|
/* $OpenBSD: lfs_alloc.c,v 1.12 2005/12/28 20:48:18 pedro Exp $ */
/* $NetBSD: lfs_alloc.c,v 1.4 1996/03/25 12:53:37 pk Exp $ */
/*
* Copyright (c) 1991, 1993, 1995
* 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.
*
* @(#)lfs_alloc.c 8.7 (Berkeley) 5/14/95
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/buf.h>
#include <sys/vnode.h>
#include <sys/syslog.h>
#include <sys/mount.h>
#include <sys/malloc.h>
#include <uvm/uvm_extern.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ufs/ufs_extern.h>
#include <ufs/lfs/lfs.h>
#include <ufs/lfs/lfs_extern.h>
extern u_long nextgennumber;
/* Allocate a new inode. */
/* ARGSUSED */
int
lfs_valloc(v)
void *v;
{
struct vop_valloc_args /* {
struct vnode *a_pvp;
int a_mode;
struct ucred *a_cred;
struct vnode **a_vpp;
} */ *ap = v;
struct lfs *fs;
struct buf *bp;
struct ifile *ifp;
struct inode *ip;
struct vnode *vp;
ufs_daddr_t blkno;
ino_t new_ino;
u_long i, max;
int error;
/* Get the head of the freelist. */
fs = VTOI(ap->a_pvp)->i_lfs;
new_ino = fs->lfs_free;
#ifdef ALLOCPRINT
printf("lfs_ialloc: allocate inode %d\n", new_ino);
#endif
/*
* Remove the inode from the free list and write the new start
* of the free list into the superblock.
*/
LFS_IENTRY(ifp, fs, new_ino, bp);
if (ifp->if_daddr != LFS_UNUSED_DADDR)
panic("lfs_ialloc: inuse inode on the free list");
fs->lfs_free = ifp->if_nextfree;
brelse(bp);
/* Extend IFILE so that the next lfs_valloc will succeed. */
if (fs->lfs_free == LFS_UNUSED_INUM) {
vp = fs->lfs_ivnode;
ip = VTOI(vp);
blkno = lblkno(fs, DIP(ip, size));
lfs_balloc(vp, 0, fs->lfs_bsize, blkno, &bp);
DIP_ADD(ip, size, fs->lfs_bsize);
vnode_pager_setsize(vp, (u_long) DIP(ip, size));
vnode_pager_uncache(vp);
i = (blkno - fs->lfs_segtabsz - fs->lfs_cleansz) *
fs->lfs_ifpb;
fs->lfs_free = i;
max = i + fs->lfs_ifpb;
for (ifp = (struct ifile *)bp->b_data; i < max; ++ifp) {
ifp->if_version = 1;
ifp->if_daddr = LFS_UNUSED_DADDR;
ifp->if_nextfree = ++i;
}
ifp--;
ifp->if_nextfree = LFS_UNUSED_INUM;
if ((error = VOP_BWRITE(bp)) != 0)
return (error);
}
/* Create a vnode to associate with the inode. */
if ((error = lfs_vcreate(ap->a_pvp->v_mount, new_ino, &vp)) != 0)
return (error);
ip = VTOI(vp);
/* Zero out the direct and indirect block addresses. */
bzero(&ip->i_din.ffs_din, sizeof(struct dinode));
ip->i_din.ffs_din.di_inumber = new_ino;
/* Set a new generation number for this inode. */
if (++nextgennumber < (u_long)time_second)
nextgennumber = time_second;
DIP_ASSIGN(ip, gen, nextgennumber);
/* Insert into the inode hash table. */
ufs_ihashins(ip);
error = ufs_vinit(vp->v_mount, lfs_specop_p, LFS_FIFOOPS, &vp);
if (error) {
vput(vp);
*ap->a_vpp = NULL;
return (error);
}
*ap->a_vpp = vp;
vp->v_flag |= VDIROP;
VREF(ip->i_devvp);
/* Set superblock modified bit and increment file count. */
fs->lfs_fmod = 1;
++fs->lfs_nfiles;
return (0);
}
/* Create a new vnode/inode pair and initialize what fields we can. */
int
lfs_vcreate(mp, ino, vpp)
struct mount *mp;
ino_t ino;
struct vnode **vpp;
{
extern int (**lfs_vnodeop_p)(void *);
struct inode *ip;
struct ufsmount *ump;
int error;
#ifdef QUOTA
int i;
#endif
/* Create the vnode. */
if ((error = getnewvnode(VT_LFS, mp, lfs_vnodeop_p, vpp)) != 0) {
*vpp = NULL;
return (error);
}
/* Get a pointer to the private mount structure. */
ump = VFSTOUFS(mp);
/* Initialize the inode. */
MALLOC(ip, struct inode *, sizeof(struct inode), M_LFSNODE, M_WAITOK);
(*vpp)->v_data = ip;
ip->i_vnode = *vpp;
ip->i_devvp = ump->um_devvp;
ip->i_flag = IN_MODIFIED;
ip->i_dev = ump->um_dev;
ip->i_number = ip->i_din.ffs_din.di_inumber = ino;
ip->i_lfs = ump->um_lfs;
#ifdef QUOTA
for (i = 0; i < MAXQUOTAS; i++)
ip->i_dquot[i] = NODQUOT;
#endif
ip->i_lockf = 0;
ip->i_diroff = 0;
ip->i_ffs1_mode = 0;
ip->i_ffs1_size = 0;
ip->i_ffs1_blocks = 0;
++ump->um_lfs->lfs_uinodes;
return (0);
}
/* Free an inode. */
/* ARGUSED */
int
lfs_vfree(v)
void *v;
{
struct vop_vfree_args /* {
struct vnode *a_pvp;
ino_t a_ino;
int a_mode;
} */ *ap = v;
SEGUSE *sup;
struct buf *bp;
struct ifile *ifp;
struct inode *ip;
struct lfs *fs;
ufs_daddr_t old_iaddr;
ino_t ino;
/* Get the inode number and file system. */
ip = VTOI(ap->a_pvp);
fs = ip->i_lfs;
ino = ip->i_number;
if (ip->i_flag & IN_MODIFIED) {
--fs->lfs_uinodes;
ip->i_flag &=
~(IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE);
}
/*
* Set the ifile's inode entry to unused, increment its version number
* and link it into the free chain.
*/
LFS_IENTRY(ifp, fs, ino, bp);
old_iaddr = ifp->if_daddr;
ifp->if_daddr = LFS_UNUSED_DADDR;
++ifp->if_version;
ifp->if_nextfree = fs->lfs_free;
fs->lfs_free = ino;
(void) VOP_BWRITE(bp);
if (old_iaddr != LFS_UNUSED_DADDR) {
LFS_SEGENTRY(sup, fs, datosn(fs, old_iaddr), bp);
#ifdef DIAGNOSTIC
if (sup->su_nbytes < sizeof(struct dinode))
panic("lfs_vfree: negative byte count (segment %d)",
datosn(fs, old_iaddr));
#endif
sup->su_nbytes -= sizeof(struct dinode);
(void) VOP_BWRITE(bp);
}
/* Set superblock modified bit and decrement file count. */
fs->lfs_fmod = 1;
--fs->lfs_nfiles;
return (0);
}
|
