Commit | Line | Data |
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da7c5cc6 | 1 | /* |
7795cb4d | 2 | * Copyright (c) 1986, 1989, 1991 Regents of the University of California. |
7188ac27 | 3 | * All rights reserved. |
da7c5cc6 | 4 | * |
b702c21d | 5 | * %sccs.include.redist.c% |
7188ac27 | 6 | * |
d942bf69 | 7 | * @(#)lfs_inode.c 7.71 (Berkeley) %G% |
da7c5cc6 | 8 | */ |
5d5124a1 | 9 | |
29ad237c KB |
10 | #include <sys/param.h> |
11 | #include <sys/systm.h> | |
12 | #include <sys/mount.h> | |
13 | #include <sys/proc.h> | |
14 | #include <sys/file.h> | |
15 | #include <sys/buf.h> | |
16 | #include <sys/vnode.h> | |
17 | #include <sys/kernel.h> | |
18 | #include <sys/malloc.h> | |
5d5124a1 | 19 | |
89663819 KM |
20 | #include <vm/vm.h> |
21 | ||
7795cb4d KB |
22 | #include <ufs/ufs/quota.h> |
23 | #include <ufs/ufs/inode.h> | |
24 | #include <ufs/ufs/ufsmount.h> | |
25 | #include <ufs/ufs/ufs_extern.h> | |
c6f5111d | 26 | |
7795cb4d KB |
27 | #include <ufs/lfs/lfs.h> |
28 | #include <ufs/lfs/lfs_extern.h> | |
2bf2d153 | 29 | |
0a0d4fba | 30 | int |
0b4d6502 | 31 | lfs_init() |
5d5124a1 | 32 | { |
a79b7b81 KB |
33 | #ifdef VERBOSE |
34 | printf("lfs_init\n"); | |
35 | #endif | |
29ad237c | 36 | return (ufs_init()); |
5d5124a1 BJ |
37 | } |
38 | ||
841fa75e | 39 | /* Search a block for a specific dinode. */ |
b4de8c04 | 40 | struct dinode * |
841fa75e KB |
41 | lfs_ifind(fs, ino, dip) |
42 | struct lfs *fs; | |
43 | ino_t ino; | |
44 | register struct dinode *dip; | |
45 | { | |
46 | register int cnt; | |
3ce71481 | 47 | register struct dinode *ldip; |
841fa75e KB |
48 | |
49 | #ifdef VERBOSE | |
50 | printf("lfs_ifind: inode %d\n", ino); | |
51 | #endif | |
3ce71481 KB |
52 | for (cnt = INOPB(fs), ldip = dip + (cnt - 1); cnt--; --ldip) |
53 | if (ldip->di_inum == ino) | |
54 | return (ldip); | |
841fa75e KB |
55 | |
56 | panic("lfs_ifind: dinode %u not found", ino); | |
57 | /* NOTREACHED */ | |
58 | } | |
59 | ||
0a0d4fba | 60 | int |
b4de8c04 KB |
61 | lfs_update(ap) |
62 | struct vop_update_args /* { | |
63 | struct vnode *a_vp; | |
64 | struct timeval *a_ta; | |
65 | struct timeval *a_tm; | |
66 | int a_waitfor; | |
67 | } */ *ap; | |
ff56f48a | 68 | { |
406c9a0d | 69 | struct vnode *vp = ap->a_vp; |
ffcee610 KM |
70 | struct inode *ip; |
71 | ||
a79b7b81 KB |
72 | #ifdef VERBOSE |
73 | printf("lfs_update\n"); | |
74 | #endif | |
406c9a0d | 75 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
ffcee610 | 76 | return (0); |
406c9a0d | 77 | ip = VTOI(vp); |
ffcee610 KM |
78 | if ((ip->i_flag & (IUPD|IACC|ICHG|IMOD)) == 0) |
79 | return (0); | |
80 | if (ip->i_flag&IACC) | |
7e11a0c9 | 81 | ip->i_atime.ts_sec = ap->a_ta->tv_sec; |
5b51b344 | 82 | if (ip->i_flag&IUPD) { |
7e11a0c9 | 83 | ip->i_mtime.ts_sec = ap->a_tm->tv_sec; |
d9011ad6 | 84 | (ip)->i_modrev++; |
5b51b344 | 85 | } |
ffcee610 | 86 | if (ip->i_flag&ICHG) |
7e11a0c9 | 87 | ip->i_ctime.ts_sec = time.tv_sec; |
ffcee610 KM |
88 | ip->i_flag &= ~(IUPD|IACC|ICHG|IMOD); |
89 | ||
b3071295 | 90 | /* Push back the vnode and any dirty blocks it may have. */ |
406c9a0d | 91 | return (ap->a_waitfor ? lfs_vflush(vp) : 0); |
5d5124a1 BJ |
92 | } |
93 | ||
2c68aab8 | 94 | /* Update segment usage information when removing a block. */ |
4ee2ad24 KB |
95 | #define UPDATE_SEGUSE \ |
96 | if (lastseg != -1) { \ | |
97 | LFS_SEGENTRY(sup, fs, lastseg, sup_bp); \ | |
5b792b30 | 98 | sup->su_nbytes -= num << fs->lfs_bshift; \ |
4ee2ad24 KB |
99 | LFS_UBWRITE(sup_bp); \ |
100 | blocksreleased += num; \ | |
101 | } | |
2c68aab8 KB |
102 | |
103 | #define SEGDEC { \ | |
104 | if (daddr != UNASSIGNED) { \ | |
105 | if (lastseg != (seg = datosn(fs, daddr))) { \ | |
106 | UPDATE_SEGUSE; \ | |
107 | num = 1; \ | |
108 | lastseg = seg; \ | |
109 | } else \ | |
110 | ++num; \ | |
111 | } \ | |
112 | } | |
113 | ||
5d5124a1 | 114 | /* |
2c68aab8 KB |
115 | * Truncate the inode ip to at most length size. Update segment usage |
116 | * table information. | |
5d5124a1 | 117 | */ |
29ad237c KB |
118 | /* ARGSUSED */ |
119 | int | |
b4de8c04 KB |
120 | lfs_truncate(ap) |
121 | struct vop_truncate_args /* { | |
122 | struct vnode *a_vp; | |
123 | off_t a_length; | |
124 | int a_flags; | |
125 | struct ucred *a_cred; | |
126 | struct proc *a_p; | |
127 | } */ *ap; | |
5d5124a1 | 128 | { |
8f42dbe0 | 129 | register INDIR *inp; |
2c68aab8 KB |
130 | register int i; |
131 | register daddr_t *daddrp; | |
b4de8c04 KB |
132 | register struct vnode *vp = ap->a_vp; |
133 | off_t length = ap->a_length; | |
4ee2ad24 | 134 | struct buf *bp, *sup_bp; |
d942bf69 | 135 | struct timeval tv; |
b3071295 | 136 | struct ifile *ifp; |
2c68aab8 KB |
137 | struct inode *ip; |
138 | struct lfs *fs; | |
139 | INDIR a[NIADDR + 2], a_end[NIADDR + 2]; | |
140 | SEGUSE *sup; | |
141 | daddr_t daddr, lastblock, lbn, olastblock; | |
0308fc84 | 142 | long off, blocksreleased; |
b4de8c04 | 143 | int e1, e2, depth, lastseg, num, offset, seg, size; |
4f083fd7 | 144 | |
a79b7b81 KB |
145 | #ifdef VERBOSE |
146 | printf("lfs_truncate\n"); | |
147 | #endif | |
b4de8c04 | 148 | vnode_pager_setsize(vp, (u_long)length); |
b3071295 | 149 | |
b4de8c04 | 150 | ip = VTOI(vp); |
b3071295 KB |
151 | fs = ip->i_lfs; |
152 | ||
153 | /* If truncating the file to 0, update the version number. */ | |
b4de8c04 | 154 | if (length == 0) { |
b3071295 KB |
155 | LFS_IENTRY(ifp, fs, ip->i_number, bp); |
156 | ++ifp->if_version; | |
157 | LFS_UBWRITE(bp); | |
158 | } | |
159 | ||
b4de8c04 | 160 | /* If length is larger than the file, just update the times. */ |
d942bf69 | 161 | tv = time; |
b4de8c04 | 162 | if (ip->i_size <= length) { |
2c68aab8 | 163 | ip->i_flag |= ICHG|IUPD; |
d942bf69 | 164 | return (VOP_UPDATE(vp, &tv, &tv, 1)); |
7b2e4f05 | 165 | } |
b3071295 | 166 | |
2c68aab8 KB |
167 | /* |
168 | * Calculate index into inode's block list of last direct and indirect | |
169 | * blocks (if any) which we want to keep. Lastblock is 0 when the | |
170 | * file is truncated to 0. | |
171 | */ | |
b4de8c04 | 172 | lastblock = lblkno(fs, length + fs->lfs_bsize - 1); |
2c68aab8 | 173 | olastblock = lblkno(fs, ip->i_size + fs->lfs_bsize - 1) - 1; |
29ad237c | 174 | |
c0bb1685 | 175 | /* |
29ad237c KB |
176 | * Update the size of the file. If the file is not being truncated to |
177 | * a block boundry, the contents of the partial block following the end | |
178 | * of the file must be zero'ed in case it ever become accessable again | |
179 | * because of subsequent file growth. | |
28821bc5 | 180 | */ |
b4de8c04 | 181 | offset = blkoff(fs, length); |
29ad237c | 182 | if (offset == 0) |
b4de8c04 | 183 | ip->i_size = length; |
29ad237c | 184 | else { |
b4de8c04 | 185 | lbn = lblkno(fs, length); |
4b61628b | 186 | #ifdef QUOTA |
b4de8c04 KB |
187 | if (e1 = getinoquota(ip)) |
188 | return (e1); | |
d5075120 | 189 | #endif |
b4de8c04 KB |
190 | if (e1 = bread(vp, lbn, fs->lfs_bsize, NOCRED, &bp)) |
191 | return (e1); | |
192 | ip->i_size = length; | |
a79b7b81 | 193 | size = blksize(fs); |
b4de8c04 | 194 | (void)vnode_pager_uncache(vp); |
a5e62f37 | 195 | bzero(bp->b_un.b_addr + offset, (unsigned)(size - offset)); |
9cf42d55 | 196 | allocbuf(bp, size); |
f28a1334 | 197 | LFS_UBWRITE(bp); |
5d5124a1 | 198 | } |
f28a1334 | 199 | /* |
2c68aab8 KB |
200 | * Modify sup->su_nbyte counters for each deleted block; keep track |
201 | * of number of blocks removed for ip->i_blocks. | |
202 | */ | |
203 | blocksreleased = 0; | |
204 | num = 0; | |
205 | lastseg = -1; | |
206 | ||
207 | for (lbn = olastblock; lbn >= lastblock;) { | |
b4de8c04 | 208 | lfs_bmaparray(vp, lbn, &daddr, a, &depth); |
2c68aab8 KB |
209 | if (lbn == olastblock) |
210 | for (i = NIADDR + 2; i--;) | |
211 | a_end[i] = a[i]; | |
212 | switch (depth) { | |
213 | case 0: /* Direct block. */ | |
214 | daddr = ip->i_db[lbn]; | |
215 | SEGDEC; | |
216 | ip->i_db[lbn] = 0; | |
217 | --lbn; | |
218 | break; | |
219 | #ifdef DIAGNOSTIC | |
220 | case 1: /* An indirect block. */ | |
221 | panic("lfs_truncate: lfs_bmaparray returned depth 1"); | |
222 | /* NOTREACHED */ | |
223 | #endif | |
224 | default: /* Chain of indirect blocks. */ | |
8f42dbe0 JH |
225 | inp = a + --depth; |
226 | if (inp->in_off > 0 && lbn != lastblock) { | |
227 | lbn -= inp->in_off < lbn - lastblock ? | |
228 | inp->in_off : lbn - lastblock; | |
2c68aab8 KB |
229 | break; |
230 | } | |
8f42dbe0 JH |
231 | for (; depth && (inp->in_off == 0 || lbn == lastblock); |
232 | --inp, --depth) { | |
2c68aab8 KB |
233 | /* |
234 | * XXX | |
235 | * The indirect block may not yet exist, so | |
236 | * bread will create one just so we can free | |
237 | * it. | |
238 | */ | |
b4de8c04 | 239 | if (bread(vp, |
8f42dbe0 | 240 | inp->in_lbn, fs->lfs_bsize, NOCRED, &bp)) |
2c68aab8 | 241 | panic("lfs_truncate: bread bno %d", |
8f42dbe0 JH |
242 | inp->in_lbn); |
243 | daddrp = bp->b_un.b_daddr + inp->in_off; | |
244 | for (i = inp->in_off; | |
2c68aab8 KB |
245 | i++ <= a_end[depth].in_off;) { |
246 | daddr = *daddrp++; | |
247 | SEGDEC; | |
248 | } | |
c86ca11e | 249 | a_end[depth].in_off = NINDIR(fs) - 1; |
8f42dbe0 | 250 | if (inp->in_off == 0) |
c86ca11e CS |
251 | brelse (bp); |
252 | else { | |
8f42dbe0 | 253 | bzero(bp->b_un.b_daddr + inp->in_off, |
2c68aab8 | 254 | fs->lfs_bsize - |
8f42dbe0 | 255 | inp->in_off * sizeof(daddr_t)); |
2c68aab8 | 256 | LFS_UBWRITE(bp); |
c86ca11e | 257 | } |
2c68aab8 | 258 | } |
c86ca11e | 259 | if (depth == 0 && a[1].in_off == 0) { |
2c68aab8 KB |
260 | off = a[0].in_off; |
261 | daddr = ip->i_ib[off]; | |
262 | SEGDEC; | |
263 | ip->i_ib[off] = 0; | |
264 | } | |
5b792b30 | 265 | if (lbn == lastblock || lbn <= NDADDR) |
2c68aab8 KB |
266 | --lbn; |
267 | else { | |
268 | lbn -= NINDIR(fs); | |
269 | if (lbn < lastblock) | |
270 | lbn = lastblock; | |
271 | } | |
272 | } | |
273 | } | |
4ee2ad24 | 274 | UPDATE_SEGUSE; |
2c68aab8 KB |
275 | ip->i_blocks -= blocksreleased; |
276 | /* | |
f28a1334 | 277 | * XXX |
2c68aab8 KB |
278 | * Currently, we don't know when we allocate an indirect block, so |
279 | * ip->i_blocks isn't getting incremented appropriately. As a result, | |
280 | * when we delete any indirect blocks, we get a bad number here. | |
f28a1334 | 281 | */ |
2c68aab8 KB |
282 | if (ip->i_blocks < 0) |
283 | ip->i_blocks = 0; | |
284 | ip->i_flag |= ICHG|IUPD; | |
b4de8c04 | 285 | e1 = vinvalbuf(vp, length > 0, ap->a_cred, ap->a_p); |
d942bf69 | 286 | e2 = VOP_UPDATE(vp, &tv, &tv, MNT_WAIT); |
b4de8c04 | 287 | return (e1 ? e1 : e2 ? e2 : 0); |
7188ac27 | 288 | } |