This source file includes following definitions.
- xiafs_dir_read
- xiafs_readdir
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12 #include <linux/sched.h>
13 #include <linux/errno.h>
14 #include <linux/kernel.h>
15 #include <linux/fs.h>
16 #include <linux/xia_fs.h>
17 #include <linux/stat.h>
18
19 #include <asm/segment.h>
20
21 #include "xiafs_mac.h"
22
23 static int xiafs_dir_read(struct inode *, struct file *, char *, int);
24 static int xiafs_readdir(struct inode *, struct file *, void *, filldir_t);
25
26 static struct file_operations xiafs_dir_operations = {
27 NULL,
28 xiafs_dir_read,
29 NULL,
30 xiafs_readdir,
31 NULL,
32 NULL,
33 NULL,
34 NULL,
35 NULL,
36 file_fsync
37 };
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41
42 struct inode_operations xiafs_dir_inode_operations = {
43 &xiafs_dir_operations,
44 xiafs_create,
45 xiafs_lookup,
46 xiafs_link,
47 xiafs_unlink,
48 xiafs_symlink,
49 xiafs_mkdir,
50 xiafs_rmdir,
51 xiafs_mknod,
52 xiafs_rename,
53 NULL,
54 NULL,
55 NULL,
56 xiafs_truncate,
57 NULL
58 };
59
60 static int xiafs_dir_read(struct inode * inode,
61 struct file * filp, char * buf, int count)
62 {
63 return -EISDIR;
64 }
65
66 static int xiafs_readdir(struct inode * inode, struct file * filp,
67 void * dirent, filldir_t filldir)
68 {
69 u_int offset, i;
70 struct buffer_head * bh;
71 struct xiafs_direct * de;
72
73 if (!inode || !inode->i_sb || !S_ISDIR(inode->i_mode))
74 return -EBADF;
75 if (inode->i_size & (XIAFS_ZSIZE(inode->i_sb) - 1) )
76 return -EBADF;
77 while (filp->f_pos < inode->i_size) {
78 offset = filp->f_pos & (XIAFS_ZSIZE(inode->i_sb) - 1);
79 bh = xiafs_bread(inode, filp->f_pos >> XIAFS_ZSIZE_BITS(inode->i_sb),0);
80 if (!bh) {
81 filp->f_pos += XIAFS_ZSIZE(inode->i_sb)-offset;
82 continue;
83 }
84 for (i = 0; i < XIAFS_ZSIZE(inode->i_sb) && i < offset; ) {
85 de = (struct xiafs_direct *) (bh->b_data + i);
86 if (!de->d_rec_len)
87 break;
88 i += de->d_rec_len;
89 }
90 offset = i;
91 de = (struct xiafs_direct *) (offset + bh->b_data);
92
93 while (offset < XIAFS_ZSIZE(inode->i_sb) && filp->f_pos < inode->i_size) {
94 if (de->d_ino > inode->i_sb->u.xiafs_sb.s_ninodes ||
95 de->d_rec_len < 12 ||
96 (char *)de+de->d_rec_len > XIAFS_ZSIZE(inode->i_sb)+bh->b_data ||
97 de->d_name_len < 1 || de->d_name_len + 8 > de->d_rec_len ||
98 de->d_name_len > _XIAFS_NAME_LEN ||
99 de->d_name[de->d_name_len] ) {
100 printk("XIA-FS: bad directory entry (%s %d)\n", WHERE_ERR);
101 brelse(bh);
102 return 0;
103 }
104 if (de->d_ino) {
105 if (!IS_RDONLY (inode)) {
106 inode->i_atime=CURRENT_TIME;
107 inode->i_dirt=1;
108 }
109 if (filldir(dirent, de->d_name, de->d_name_len, filp->f_pos, de->d_ino) < 0) {
110 brelse(bh);
111 return 0;
112 }
113 }
114 offset += de->d_rec_len;
115 filp->f_pos += de->d_rec_len;
116 de = (struct xiafs_direct *) (offset + bh->b_data);
117 }
118 brelse(bh);
119 if (offset > XIAFS_ZSIZE(inode->i_sb)) {
120 printk("XIA-FS: bad directory (%s %d)\n", WHERE_ERR);
121 return 0;
122 }
123 }
124 if (!IS_RDONLY (inode)) {
125 inode->i_atime=CURRENT_TIME;
126 inode->i_dirt=1;
127 }
128 return 0;
129 }