This source file includes following definitions.
- ext_dir_read
- ext_readdir
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15 #include <asm/segment.h>
16
17 #include <linux/errno.h>
18 #include <linux/kernel.h>
19 #include <linux/fs.h>
20 #include <linux/ext_fs.h>
21 #include <linux/stat.h>
22
23 static int ext_dir_read(struct inode * inode, struct file * filp, char * buf, int count)
24 {
25 return -EISDIR;
26 }
27
28 static int ext_readdir(struct inode *, struct file *, struct dirent *, int);
29
30 static struct file_operations ext_dir_operations = {
31 NULL,
32 ext_dir_read,
33 NULL,
34 ext_readdir,
35 NULL,
36 NULL,
37 NULL,
38 NULL,
39 NULL
40 };
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44
45 struct inode_operations ext_dir_inode_operations = {
46 &ext_dir_operations,
47 ext_create,
48 ext_lookup,
49 ext_link,
50 ext_unlink,
51 ext_symlink,
52 ext_mkdir,
53 ext_rmdir,
54 ext_mknod,
55 ext_rename,
56 NULL,
57 NULL,
58 NULL,
59 ext_truncate
60 };
61
62 static int ext_readdir(struct inode * inode, struct file * filp,
63 struct dirent * dirent, int count)
64 {
65 unsigned int offset,i;
66 char c;
67 struct buffer_head * bh;
68 struct ext_dir_entry * de;
69
70 if (!inode || !S_ISDIR(inode->i_mode))
71 return -EBADF;
72 while (filp->f_pos < inode->i_size) {
73 offset = filp->f_pos & 1023;
74 bh = ext_bread(inode,(filp->f_pos)>>BLOCK_SIZE_BITS,0);
75 if (!bh) {
76 filp->f_pos += 1024-offset;
77 continue;
78 }
79 de = (struct ext_dir_entry *) (offset + bh->b_data);
80 while (offset < 1024 && filp->f_pos < inode->i_size) {
81 offset += de->rec_len;
82 filp->f_pos += de->rec_len;
83 if (de->rec_len < 8 || de->rec_len % 4 != 0 ||
84 de->rec_len < de->name_len + 8) {
85 printk ("ext_readdir: bad directory entry\n");
86 printk ("dev=%d, dir=%d, offset=%d, rec_len=%d, name_len=%d\n",
87 inode->i_dev, inode->i_ino, offset, de->rec_len, de->name_len);
88 return 0;
89 }
90 if (de->inode) {
91 for (i = 0; i < de->name_len; i++)
92 if (c = de->name[i])
93 put_fs_byte(c,i+dirent->d_name);
94 else
95 break;
96 if (i) {
97 put_fs_long(de->inode,&dirent->d_ino);
98 put_fs_byte(0,i+dirent->d_name);
99 put_fs_word(i,&dirent->d_reclen);
100 brelse(bh);
101 return i;
102 }
103 }
104 de = (struct ext_dir_entry *) ((char *) de
105 + de->rec_len);
106 }
107 brelse(bh);
108 }
109 return 0;
110 }