lfs_alloc.c revision 1.16 1 1.16 thorpej /* $NetBSD: lfs_alloc.c,v 1.16 1998/10/23 00:32:35 thorpej Exp $ */
2 1.2 cgd
3 1.1 mycroft /*
4 1.1 mycroft * Copyright (c) 1991, 1993
5 1.1 mycroft * The Regents of the University of California. All rights reserved.
6 1.1 mycroft *
7 1.1 mycroft * Redistribution and use in source and binary forms, with or without
8 1.1 mycroft * modification, are permitted provided that the following conditions
9 1.1 mycroft * are met:
10 1.1 mycroft * 1. Redistributions of source code must retain the above copyright
11 1.1 mycroft * notice, this list of conditions and the following disclaimer.
12 1.1 mycroft * 2. Redistributions in binary form must reproduce the above copyright
13 1.1 mycroft * notice, this list of conditions and the following disclaimer in the
14 1.1 mycroft * documentation and/or other materials provided with the distribution.
15 1.1 mycroft * 3. All advertising materials mentioning features or use of this software
16 1.1 mycroft * must display the following acknowledgement:
17 1.1 mycroft * This product includes software developed by the University of
18 1.1 mycroft * California, Berkeley and its contributors.
19 1.1 mycroft * 4. Neither the name of the University nor the names of its contributors
20 1.1 mycroft * may be used to endorse or promote products derived from this software
21 1.1 mycroft * without specific prior written permission.
22 1.1 mycroft *
23 1.1 mycroft * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 1.1 mycroft * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 1.1 mycroft * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 1.1 mycroft * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 1.1 mycroft * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 1.1 mycroft * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 1.1 mycroft * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 1.1 mycroft * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 1.1 mycroft * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 1.1 mycroft * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 1.1 mycroft * SUCH DAMAGE.
34 1.1 mycroft *
35 1.2 cgd * @(#)lfs_alloc.c 8.4 (Berkeley) 1/4/94
36 1.1 mycroft */
37 1.12 scottr
38 1.13 scottr #if defined(_KERNEL) && !defined(_LKM)
39 1.12 scottr #include "opt_quota.h"
40 1.13 scottr #endif
41 1.1 mycroft
42 1.1 mycroft #include <sys/param.h>
43 1.3 christos #include <sys/systm.h>
44 1.1 mycroft #include <sys/kernel.h>
45 1.1 mycroft #include <sys/buf.h>
46 1.1 mycroft #include <sys/vnode.h>
47 1.1 mycroft #include <sys/syslog.h>
48 1.1 mycroft #include <sys/mount.h>
49 1.1 mycroft #include <sys/malloc.h>
50 1.15 thorpej #include <sys/pool.h>
51 1.1 mycroft
52 1.1 mycroft #include <vm/vm.h>
53 1.1 mycroft
54 1.1 mycroft #include <ufs/ufs/quota.h>
55 1.1 mycroft #include <ufs/ufs/inode.h>
56 1.1 mycroft #include <ufs/ufs/ufsmount.h>
57 1.3 christos #include <ufs/ufs/ufs_extern.h>
58 1.1 mycroft
59 1.1 mycroft #include <ufs/lfs/lfs.h>
60 1.1 mycroft #include <ufs/lfs/lfs_extern.h>
61 1.1 mycroft
62 1.1 mycroft /* Allocate a new inode. */
63 1.1 mycroft /* ARGSUSED */
64 1.1 mycroft int
65 1.3 christos lfs_valloc(v)
66 1.3 christos void *v;
67 1.3 christos {
68 1.1 mycroft struct vop_valloc_args /* {
69 1.1 mycroft struct vnode *a_pvp;
70 1.1 mycroft int a_mode;
71 1.1 mycroft struct ucred *a_cred;
72 1.1 mycroft struct vnode **a_vpp;
73 1.3 christos } */ *ap = v;
74 1.1 mycroft struct lfs *fs;
75 1.1 mycroft struct buf *bp;
76 1.1 mycroft struct ifile *ifp;
77 1.1 mycroft struct inode *ip;
78 1.1 mycroft struct vnode *vp;
79 1.11 fvdl ufs_daddr_t blkno;
80 1.1 mycroft ino_t new_ino;
81 1.1 mycroft u_long i, max;
82 1.1 mycroft int error;
83 1.1 mycroft
84 1.1 mycroft /* Get the head of the freelist. */
85 1.1 mycroft fs = VTOI(ap->a_pvp)->i_lfs;
86 1.1 mycroft new_ino = fs->lfs_free;
87 1.1 mycroft #ifdef ALLOCPRINT
88 1.6 christos printf("lfs_ialloc: allocate inode %d\n", new_ino);
89 1.1 mycroft #endif
90 1.1 mycroft
91 1.1 mycroft /*
92 1.1 mycroft * Remove the inode from the free list and write the new start
93 1.1 mycroft * of the free list into the superblock.
94 1.1 mycroft */
95 1.1 mycroft LFS_IENTRY(ifp, fs, new_ino, bp);
96 1.1 mycroft if (ifp->if_daddr != LFS_UNUSED_DADDR)
97 1.1 mycroft panic("lfs_ialloc: inuse inode on the free list");
98 1.1 mycroft fs->lfs_free = ifp->if_nextfree;
99 1.1 mycroft brelse(bp);
100 1.1 mycroft
101 1.1 mycroft /* Extend IFILE so that the next lfs_valloc will succeed. */
102 1.1 mycroft if (fs->lfs_free == LFS_UNUSED_INUM) {
103 1.1 mycroft vp = fs->lfs_ivnode;
104 1.1 mycroft ip = VTOI(vp);
105 1.8 bouyer blkno = lblkno(fs, ip->i_ffs_size);
106 1.11 fvdl lfs_balloc(vp, 0, fs->lfs_bsize, blkno, &bp);
107 1.8 bouyer ip->i_ffs_size += fs->lfs_bsize;
108 1.10 chs #ifdef UVM
109 1.10 chs uvm_vnp_setsize(vp, ip->i_ffs_size);
110 1.10 chs (void)uvm_vnp_uncache(vp);
111 1.10 chs #else
112 1.9 drochner vnode_pager_setsize(vp, ip->i_ffs_size);
113 1.1 mycroft vnode_pager_uncache(vp);
114 1.10 chs #endif
115 1.1 mycroft
116 1.1 mycroft i = (blkno - fs->lfs_segtabsz - fs->lfs_cleansz) *
117 1.1 mycroft fs->lfs_ifpb;
118 1.1 mycroft fs->lfs_free = i;
119 1.1 mycroft max = i + fs->lfs_ifpb;
120 1.1 mycroft for (ifp = (struct ifile *)bp->b_data; i < max; ++ifp) {
121 1.1 mycroft ifp->if_version = 1;
122 1.1 mycroft ifp->if_daddr = LFS_UNUSED_DADDR;
123 1.1 mycroft ifp->if_nextfree = ++i;
124 1.1 mycroft }
125 1.1 mycroft ifp--;
126 1.1 mycroft ifp->if_nextfree = LFS_UNUSED_INUM;
127 1.3 christos if ((error = VOP_BWRITE(bp)) != 0)
128 1.1 mycroft return (error);
129 1.1 mycroft }
130 1.1 mycroft
131 1.1 mycroft /* Create a vnode to associate with the inode. */
132 1.3 christos if ((error = lfs_vcreate(ap->a_pvp->v_mount, new_ino, &vp)) != 0)
133 1.1 mycroft return (error);
134 1.1 mycroft
135 1.1 mycroft
136 1.1 mycroft ip = VTOI(vp);
137 1.1 mycroft /* Zero out the direct and indirect block addresses. */
138 1.16 thorpej bzero(&ip->i_din, sizeof(ip->i_din));
139 1.8 bouyer ip->i_din.ffs_din.di_inumber = new_ino;
140 1.1 mycroft
141 1.1 mycroft /* Set a new generation number for this inode. */
142 1.8 bouyer ip->i_ffs_gen++;
143 1.1 mycroft
144 1.1 mycroft /* Insert into the inode hash table. */
145 1.1 mycroft ufs_ihashins(ip);
146 1.1 mycroft
147 1.14 sommerfe error = ufs_vinit(vp->v_mount, lfs_specop_p, lfs_fifoop_p, &vp);
148 1.3 christos if (error) {
149 1.1 mycroft vput(vp);
150 1.1 mycroft *ap->a_vpp = NULL;
151 1.1 mycroft return (error);
152 1.1 mycroft }
153 1.1 mycroft
154 1.1 mycroft *ap->a_vpp = vp;
155 1.1 mycroft vp->v_flag |= VDIROP;
156 1.1 mycroft VREF(ip->i_devvp);
157 1.1 mycroft
158 1.1 mycroft /* Set superblock modified bit and increment file count. */
159 1.1 mycroft fs->lfs_fmod = 1;
160 1.1 mycroft ++fs->lfs_nfiles;
161 1.1 mycroft return (0);
162 1.1 mycroft }
163 1.1 mycroft
164 1.1 mycroft /* Create a new vnode/inode pair and initialize what fields we can. */
165 1.1 mycroft int
166 1.1 mycroft lfs_vcreate(mp, ino, vpp)
167 1.1 mycroft struct mount *mp;
168 1.1 mycroft ino_t ino;
169 1.1 mycroft struct vnode **vpp;
170 1.1 mycroft {
171 1.3 christos extern int (**lfs_vnodeop_p) __P((void *));
172 1.1 mycroft struct inode *ip;
173 1.1 mycroft struct ufsmount *ump;
174 1.4 pk int error;
175 1.4 pk #ifdef QUOTA
176 1.4 pk int i;
177 1.4 pk #endif
178 1.1 mycroft
179 1.1 mycroft /* Create the vnode. */
180 1.3 christos if ((error = getnewvnode(VT_LFS, mp, lfs_vnodeop_p, vpp)) != 0) {
181 1.1 mycroft *vpp = NULL;
182 1.1 mycroft return (error);
183 1.1 mycroft }
184 1.1 mycroft
185 1.1 mycroft /* Get a pointer to the private mount structure. */
186 1.1 mycroft ump = VFSTOUFS(mp);
187 1.1 mycroft
188 1.1 mycroft /* Initialize the inode. */
189 1.15 thorpej ip = pool_get(&lfs_inode_pool, PR_WAITOK);
190 1.11 fvdl lockinit(&ip->i_lock, PINOD, "lfsinode", 0, 0);
191 1.1 mycroft (*vpp)->v_data = ip;
192 1.1 mycroft ip->i_vnode = *vpp;
193 1.1 mycroft ip->i_devvp = ump->um_devvp;
194 1.1 mycroft ip->i_flag = IN_MODIFIED;
195 1.1 mycroft ip->i_dev = ump->um_dev;
196 1.8 bouyer ip->i_number = ip->i_din.ffs_din.di_inumber = ino;
197 1.1 mycroft ip->i_lfs = ump->um_lfs;
198 1.1 mycroft #ifdef QUOTA
199 1.1 mycroft for (i = 0; i < MAXQUOTAS; i++)
200 1.1 mycroft ip->i_dquot[i] = NODQUOT;
201 1.1 mycroft #endif
202 1.1 mycroft ip->i_lockf = 0;
203 1.1 mycroft ip->i_diroff = 0;
204 1.8 bouyer ip->i_ffs_mode = 0;
205 1.8 bouyer ip->i_ffs_size = 0;
206 1.8 bouyer ip->i_ffs_blocks = 0;
207 1.1 mycroft ++ump->um_lfs->lfs_uinodes;
208 1.1 mycroft return (0);
209 1.1 mycroft }
210 1.1 mycroft
211 1.1 mycroft /* Free an inode. */
212 1.1 mycroft /* ARGUSED */
213 1.1 mycroft int
214 1.3 christos lfs_vfree(v)
215 1.3 christos void *v;
216 1.3 christos {
217 1.1 mycroft struct vop_vfree_args /* {
218 1.1 mycroft struct vnode *a_pvp;
219 1.1 mycroft ino_t a_ino;
220 1.1 mycroft int a_mode;
221 1.3 christos } */ *ap = v;
222 1.1 mycroft SEGUSE *sup;
223 1.1 mycroft struct buf *bp;
224 1.1 mycroft struct ifile *ifp;
225 1.1 mycroft struct inode *ip;
226 1.1 mycroft struct lfs *fs;
227 1.11 fvdl ufs_daddr_t old_iaddr;
228 1.1 mycroft ino_t ino;
229 1.1 mycroft
230 1.1 mycroft /* Get the inode number and file system. */
231 1.1 mycroft ip = VTOI(ap->a_pvp);
232 1.1 mycroft fs = ip->i_lfs;
233 1.1 mycroft ino = ip->i_number;
234 1.1 mycroft if (ip->i_flag & IN_MODIFIED) {
235 1.1 mycroft --fs->lfs_uinodes;
236 1.1 mycroft ip->i_flag &=
237 1.1 mycroft ~(IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE);
238 1.1 mycroft }
239 1.1 mycroft /*
240 1.1 mycroft * Set the ifile's inode entry to unused, increment its version number
241 1.1 mycroft * and link it into the free chain.
242 1.1 mycroft */
243 1.1 mycroft LFS_IENTRY(ifp, fs, ino, bp);
244 1.1 mycroft old_iaddr = ifp->if_daddr;
245 1.1 mycroft ifp->if_daddr = LFS_UNUSED_DADDR;
246 1.1 mycroft ++ifp->if_version;
247 1.1 mycroft ifp->if_nextfree = fs->lfs_free;
248 1.1 mycroft fs->lfs_free = ino;
249 1.1 mycroft (void) VOP_BWRITE(bp);
250 1.1 mycroft
251 1.1 mycroft if (old_iaddr != LFS_UNUSED_DADDR) {
252 1.1 mycroft LFS_SEGENTRY(sup, fs, datosn(fs, old_iaddr), bp);
253 1.1 mycroft #ifdef DIAGNOSTIC
254 1.16 thorpej if (sup->su_nbytes < DINODE_SIZE)
255 1.1 mycroft panic("lfs_vfree: negative byte count (segment %d)\n",
256 1.1 mycroft datosn(fs, old_iaddr));
257 1.1 mycroft #endif
258 1.16 thorpej sup->su_nbytes -= DINODE_SIZE;
259 1.1 mycroft (void) VOP_BWRITE(bp);
260 1.1 mycroft }
261 1.1 mycroft
262 1.1 mycroft /* Set superblock modified bit and decrement file count. */
263 1.1 mycroft fs->lfs_fmod = 1;
264 1.1 mycroft --fs->lfs_nfiles;
265 1.1 mycroft return (0);
266 1.1 mycroft }
267