1 /*
2 * Copyright (c) 1991, 1993, 1995
3 * The Regents of the University of California. All rights reserved.
4 *
5 * %sccs.include.redist.c%
6 *
7 * @(#)lfs_alloc.c 8.7 (Berkeley) 05/14/95
8 */
9
10 #include <sys/param.h>
11 #include <sys/kernel.h>
12 #include <sys/buf.h>
13 #include <sys/vnode.h>
14 #include <sys/syslog.h>
15 #include <sys/mount.h>
16 #include <sys/malloc.h>
17
18 #include <vm/vm.h>
19
20 #include <ufs/ufs/quota.h>
21 #include <ufs/ufs/inode.h>
22 #include <ufs/ufs/ufsmount.h>
23 #include <ufs/ufs/ufs_extern.h>
24
25 #include <ufs/lfs/lfs.h>
26 #include <ufs/lfs/lfs_extern.h>
27
28 extern u_long nextgennumber;
29
30 /* Allocate a new inode. */
31 /* ARGSUSED */
32 int
lfs_valloc(ap)33 lfs_valloc(ap)
34 struct vop_valloc_args /* {
35 struct vnode *a_pvp;
36 int a_mode;
37 struct ucred *a_cred;
38 struct vnode **a_vpp;
39 } */ *ap;
40 {
41 struct lfs *fs;
42 struct buf *bp;
43 struct ifile *ifp;
44 struct inode *ip;
45 struct vnode *vp;
46 ufs_daddr_t blkno;
47 ino_t new_ino;
48 u_long i, max;
49 int error;
50
51 /* Get the head of the freelist. */
52 fs = VTOI(ap->a_pvp)->i_lfs;
53 new_ino = fs->lfs_free;
54 #ifdef ALLOCPRINT
55 printf("lfs_ialloc: allocate inode %d\n", new_ino);
56 #endif
57
58 /*
59 * Remove the inode from the free list and write the new start
60 * of the free list into the superblock.
61 */
62 LFS_IENTRY(ifp, fs, new_ino, bp);
63 if (ifp->if_daddr != LFS_UNUSED_DADDR)
64 panic("lfs_ialloc: inuse inode on the free list");
65 fs->lfs_free = ifp->if_nextfree;
66 brelse(bp);
67
68 /* Extend IFILE so that the next lfs_valloc will succeed. */
69 if (fs->lfs_free == LFS_UNUSED_INUM) {
70 vp = fs->lfs_ivnode;
71 ip = VTOI(vp);
72 blkno = lblkno(fs, ip->i_size);
73 lfs_balloc(vp, 0, fs->lfs_bsize, blkno, &bp);
74 ip->i_size += fs->lfs_bsize;
75 vnode_pager_setsize(vp, (u_long)ip->i_size);
76 vnode_pager_uncache(vp);
77
78 i = (blkno - fs->lfs_segtabsz - fs->lfs_cleansz) *
79 fs->lfs_ifpb;
80 fs->lfs_free = i;
81 max = i + fs->lfs_ifpb;
82 for (ifp = (struct ifile *)bp->b_data; i < max; ++ifp) {
83 ifp->if_version = 1;
84 ifp->if_daddr = LFS_UNUSED_DADDR;
85 ifp->if_nextfree = ++i;
86 }
87 ifp--;
88 ifp->if_nextfree = LFS_UNUSED_INUM;
89 if (error = VOP_BWRITE(bp))
90 return (error);
91 }
92
93 /* Create a vnode to associate with the inode. */
94 if (error = lfs_vcreate(ap->a_pvp->v_mount, new_ino, &vp))
95 return (error);
96
97
98 ip = VTOI(vp);
99 /* Zero out the direct and indirect block addresses. */
100 bzero(&ip->i_din, sizeof(struct dinode));
101 ip->i_din.di_inumber = new_ino;
102
103 /* Set a new generation number for this inode. */
104 if (++nextgennumber < (u_long)time.tv_sec)
105 nextgennumber = time.tv_sec;
106 ip->i_gen = nextgennumber;
107
108 /* Insert into the inode hash table. */
109 ufs_ihashins(ip);
110
111 if (error = ufs_vinit(vp->v_mount, lfs_specop_p, LFS_FIFOOPS, &vp)) {
112 vput(vp);
113 *ap->a_vpp = NULL;
114 return (error);
115 }
116
117 *ap->a_vpp = vp;
118 vp->v_flag |= VDIROP;
119 VREF(ip->i_devvp);
120
121 /* Set superblock modified bit and increment file count. */
122 fs->lfs_fmod = 1;
123 ++fs->lfs_nfiles;
124 return (0);
125 }
126
127 /* Create a new vnode/inode pair and initialize what fields we can. */
128 int
lfs_vcreate(mp,ino,vpp)129 lfs_vcreate(mp, ino, vpp)
130 struct mount *mp;
131 ino_t ino;
132 struct vnode **vpp;
133 {
134 extern int (**lfs_vnodeop_p)();
135 struct inode *ip;
136 struct ufsmount *ump;
137 int error, i;
138
139 /* Create the vnode. */
140 if (error = getnewvnode(VT_LFS, mp, lfs_vnodeop_p, vpp)) {
141 *vpp = NULL;
142 return (error);
143 }
144
145 /* Get a pointer to the private mount structure. */
146 ump = VFSTOUFS(mp);
147
148 /* Initialize the inode. */
149 MALLOC(ip, struct inode *, sizeof(struct inode), M_LFSNODE, M_WAITOK);
150 lockinit(&ip->i_lock, PINOD, "lfsinode", 0, 0);
151 (*vpp)->v_data = ip;
152 ip->i_vnode = *vpp;
153 ip->i_devvp = ump->um_devvp;
154 ip->i_flag = IN_MODIFIED;
155 ip->i_dev = ump->um_dev;
156 ip->i_number = ip->i_din.di_inumber = ino;
157 ip->i_lfs = ump->um_lfs;
158 #ifdef QUOTA
159 for (i = 0; i < MAXQUOTAS; i++)
160 ip->i_dquot[i] = NODQUOT;
161 #endif
162 ip->i_lockf = 0;
163 ip->i_diroff = 0;
164 ip->i_mode = 0;
165 ip->i_size = 0;
166 ip->i_blocks = 0;
167 ++ump->um_lfs->lfs_uinodes;
168 return (0);
169 }
170
171 /* Free an inode. */
172 /* ARGUSED */
173 int
lfs_vfree(ap)174 lfs_vfree(ap)
175 struct vop_vfree_args /* {
176 struct vnode *a_pvp;
177 ino_t a_ino;
178 int a_mode;
179 } */ *ap;
180 {
181 SEGUSE *sup;
182 struct buf *bp;
183 struct ifile *ifp;
184 struct inode *ip;
185 struct lfs *fs;
186 ufs_daddr_t old_iaddr;
187 ino_t ino;
188
189 /* Get the inode number and file system. */
190 ip = VTOI(ap->a_pvp);
191 fs = ip->i_lfs;
192 ino = ip->i_number;
193 if (ip->i_flag & IN_MODIFIED) {
194 --fs->lfs_uinodes;
195 ip->i_flag &=
196 ~(IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE);
197 }
198 /*
199 * Set the ifile's inode entry to unused, increment its version number
200 * and link it into the free chain.
201 */
202 LFS_IENTRY(ifp, fs, ino, bp);
203 old_iaddr = ifp->if_daddr;
204 ifp->if_daddr = LFS_UNUSED_DADDR;
205 ++ifp->if_version;
206 ifp->if_nextfree = fs->lfs_free;
207 fs->lfs_free = ino;
208 (void) VOP_BWRITE(bp);
209
210 if (old_iaddr != LFS_UNUSED_DADDR) {
211 LFS_SEGENTRY(sup, fs, datosn(fs, old_iaddr), bp);
212 #ifdef DIAGNOSTIC
213 if (sup->su_nbytes < sizeof(struct dinode))
214 panic("lfs_vfree: negative byte count (segment %d)\n",
215 datosn(fs, old_iaddr));
216 #endif
217 sup->su_nbytes -= sizeof(struct dinode);
218 (void) VOP_BWRITE(bp);
219 }
220
221 /* Set superblock modified bit and decrement file count. */
222 fs->lfs_fmod = 1;
223 --fs->lfs_nfiles;
224 return (0);
225 }
226