+/*
+ * Special purpose version of ginode used to optimize first pass
+ * over all the inodes in numerical order.
+ */
+ino_t nextino, lastinum;
+long readcnt, readpercg, fullcnt, inobufsize, partialcnt, partialsize;
+struct dinode *inodebuf;
+
+struct dinode *
+getnextinode(inumber)
+ ino_t inumber;
+{
+ long size;
+ daddr_t dblk;
+ static struct dinode *dp;
+
+ if (inumber != nextino++ || inumber > maxino)
+ errexit("bad inode number %d to nextinode\n", inumber);
+ if (inumber >= lastinum) {
+ readcnt++;
+ dblk = fsbtodb(&sblock, ino_to_fsba(&sblock, lastinum));
+ if (readcnt % readpercg == 0) {
+ size = partialsize;
+ lastinum += partialcnt;
+ } else {
+ size = inobufsize;
+ lastinum += fullcnt;
+ }
+ (void)bread(fsreadfd, (char *)inodebuf, dblk, size); /* ??? */
+ dp = inodebuf;
+ }
+ return (dp++);
+}
+
+resetinodebuf()
+{
+
+ startinum = 0;
+ nextino = 0;
+ lastinum = 0;
+ readcnt = 0;
+ inobufsize = blkroundup(&sblock, INOBUFSIZE);
+ fullcnt = inobufsize / sizeof(struct dinode);
+ readpercg = sblock.fs_ipg / fullcnt;
+ partialcnt = sblock.fs_ipg % fullcnt;
+ partialsize = partialcnt * sizeof(struct dinode);
+ if (partialcnt != 0) {
+ readpercg++;
+ } else {
+ partialcnt = fullcnt;
+ partialsize = inobufsize;
+ }
+ if (inodebuf == NULL &&
+ (inodebuf = (struct dinode *)malloc((unsigned)inobufsize)) == NULL)
+ errexit("Cannot allocate space for inode buffer\n");
+ while (nextino < ROOTINO)
+ (void)getnextinode(nextino);
+}
+
+freeinodebuf()
+{
+
+ if (inodebuf != NULL)
+ free((char *)inodebuf);
+ inodebuf = NULL;
+}
+
+/*
+ * Routines to maintain information about directory inodes.
+ * This is built during the first pass and used during the
+ * second and third passes.
+ *
+ * Enter inodes into the cache.
+ */
+cacheino(dp, inumber)
+ register struct dinode *dp;
+ ino_t inumber;
+{
+ register struct inoinfo *inp;
+ struct inoinfo **inpp;
+ unsigned int blks;
+
+ blks = howmany(dp->di_size, sblock.fs_bsize);
+ if (blks > NDADDR)
+ blks = NDADDR + NIADDR;
+ inp = (struct inoinfo *)
+ malloc(sizeof(*inp) + (blks - 1) * sizeof(daddr_t));
+ if (inp == NULL)
+ return;
+ inpp = &inphead[inumber % numdirs];
+ inp->i_nexthash = *inpp;
+ *inpp = inp;
+ inp->i_parent = (ino_t)0;
+ inp->i_dotdot = (ino_t)0;
+ inp->i_number = inumber;
+ inp->i_isize = dp->di_size;
+ inp->i_numblks = blks * sizeof(daddr_t);
+ bcopy((char *)&dp->di_db[0], (char *)&inp->i_blks[0],
+ (size_t)inp->i_numblks);
+ if (inplast == listmax) {
+ listmax += 100;
+ inpsort = (struct inoinfo **)realloc((char *)inpsort,
+ (unsigned)listmax * sizeof(struct inoinfo *));
+ if (inpsort == NULL)
+ errexit("cannot increase directory list");
+ }
+ inpsort[inplast++] = inp;
+}
+
+/*
+ * Look up an inode cache structure.
+ */
+struct inoinfo *
+getinoinfo(inumber)
+ ino_t inumber;
+{
+ register struct inoinfo *inp;
+
+ for (inp = inphead[inumber % numdirs]; inp; inp = inp->i_nexthash) {
+ if (inp->i_number != inumber)
+ continue;
+ return (inp);
+ }
+ errexit("cannot find inode %d\n", inumber);
+ return ((struct inoinfo *)0);
+}
+
+/*
+ * Clean up all the inode cache structure.
+ */
+inocleanup()
+{
+ register struct inoinfo **inpp;
+
+ if (inphead == NULL)
+ return;
+ for (inpp = &inpsort[inplast - 1]; inpp >= inpsort; inpp--)
+ free((char *)(*inpp));
+ free((char *)inphead);
+ free((char *)inpsort);
+ inphead = inpsort = NULL;
+}
+
projects / unix-history / blobdiff