4 * Copyright (c) 1999 Al Smith
6 * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
9 #include <linux/string.h>
10 #include <linux/efs_fs.h>
12 static efs_ino_t efs_find_entry(struct inode *inode, const char *name, int len) {
13 struct buffer_head *bh;
17 struct efs_dir *dirblock;
18 struct efs_dentry *dirslot;
22 if (inode->i_size & (EFS_DIRBSIZE-1))
23 printk(KERN_WARNING "EFS: WARNING: find_entry(): directory size not a multiple of EFS_DIRBSIZE\n");
25 for(block = 0; block < inode->i_blocks; block++) {
27 bh = sb_bread(inode->i_sb, efs_bmap(inode, block));
29 printk(KERN_ERR "EFS: find_entry(): failed to read dir block %d\n", block);
33 dirblock = (struct efs_dir *) bh->b_data;
35 if (be16_to_cpu(dirblock->magic) != EFS_DIRBLK_MAGIC) {
36 printk(KERN_ERR "EFS: find_entry(): invalid directory block\n");
41 for(slot = 0; slot < dirblock->slots; slot++) {
42 dirslot = (struct efs_dentry *) (((char *) bh->b_data) + EFS_SLOTAT(dirblock, slot));
44 namelen = dirslot->namelen;
45 nameptr = dirslot->name;
47 if ((namelen == len) && (!memcmp(name, nameptr, len))) {
48 inodenum = be32_to_cpu(dirslot->inode);
58 struct dentry *efs_lookup(struct inode *dir, struct dentry *dentry) {
62 if (!dir || !S_ISDIR(dir->i_mode))
63 return ERR_PTR(-ENOENT);
67 inodenum = efs_find_entry(dir, dentry->d_name.name, dentry->d_name.len);
69 if (!(inode = iget(dir->i_sb, inodenum)))
70 return ERR_PTR(-EACCES);