fs/Kconfig: move qnx4 out
[linux-2.6.git] / fs / qnx4 / dir.c
1 /*
2  * QNX4 file system, Linux implementation.
3  *
4  * Version : 0.2.1
5  *
6  * Using parts of the xiafs filesystem.
7  *
8  * History :
9  *
10  * 28-05-1998 by Richard Frowijn : first release.
11  * 20-06-1998 by Frank Denis : Linux 2.1.99+ & dcache support.
12  */
13
14 #include <linux/string.h>
15 #include <linux/errno.h>
16 #include <linux/fs.h>
17 #include <linux/qnx4_fs.h>
18 #include <linux/stat.h>
19 #include <linux/smp_lock.h>
20 #include <linux/buffer_head.h>
21
22
23 static int qnx4_readdir(struct file *filp, void *dirent, filldir_t filldir)
24 {
25         struct inode *inode = filp->f_path.dentry->d_inode;
26         unsigned int offset;
27         struct buffer_head *bh;
28         struct qnx4_inode_entry *de;
29         struct qnx4_link_info *le;
30         unsigned long blknum;
31         int ix, ino;
32         int size;
33
34         QNX4DEBUG(("qnx4_readdir:i_size = %ld\n", (long) inode->i_size));
35         QNX4DEBUG(("filp->f_pos         = %ld\n", (long) filp->f_pos));
36
37         lock_kernel();
38
39         while (filp->f_pos < inode->i_size) {
40                 blknum = qnx4_block_map( inode, filp->f_pos >> QNX4_BLOCK_SIZE_BITS );
41                 bh = sb_bread(inode->i_sb, blknum);
42                 if(bh==NULL) {
43                         printk(KERN_ERR "qnx4_readdir: bread failed (%ld)\n", blknum);
44                         break;
45                 }
46                 ix = (int)(filp->f_pos >> QNX4_DIR_ENTRY_SIZE_BITS) % QNX4_INODES_PER_BLOCK;
47                 while (ix < QNX4_INODES_PER_BLOCK) {
48                         offset = ix * QNX4_DIR_ENTRY_SIZE;
49                         de = (struct qnx4_inode_entry *) (bh->b_data + offset);
50                         size = strlen(de->di_fname);
51                         if (size) {
52                                 if ( !( de->di_status & QNX4_FILE_LINK ) && size > QNX4_SHORT_NAME_MAX )
53                                         size = QNX4_SHORT_NAME_MAX;
54                                 else if ( size > QNX4_NAME_MAX )
55                                         size = QNX4_NAME_MAX;
56
57                                 if ( ( de->di_status & (QNX4_FILE_USED|QNX4_FILE_LINK) ) != 0 ) {
58                                         QNX4DEBUG(("qnx4_readdir:%.*s\n", size, de->di_fname));
59                                         if ( ( de->di_status & QNX4_FILE_LINK ) == 0 )
60                                                 ino = blknum * QNX4_INODES_PER_BLOCK + ix - 1;
61                                         else {
62                                                 le  = (struct qnx4_link_info*)de;
63                                                 ino = ( le32_to_cpu(le->dl_inode_blk) - 1 ) *
64                                                         QNX4_INODES_PER_BLOCK +
65                                                         le->dl_inode_ndx;
66                                         }
67                                         if (filldir(dirent, de->di_fname, size, filp->f_pos, ino, DT_UNKNOWN) < 0) {
68                                                 brelse(bh);
69                                                 goto out;
70                                         }
71                                 }
72                         }
73                         ix++;
74                         filp->f_pos += QNX4_DIR_ENTRY_SIZE;
75                 }
76                 brelse(bh);
77         }
78 out:
79         unlock_kernel();
80         return 0;
81 }
82
83 const struct file_operations qnx4_dir_operations =
84 {
85         .read           = generic_read_dir,
86         .readdir        = qnx4_readdir,
87         .fsync          = file_fsync,
88 };
89
90 const struct inode_operations qnx4_dir_inode_operations =
91 {
92         .lookup         = qnx4_lookup,
93 #ifdef CONFIG_QNX4FS_RW
94         .create         = qnx4_create,
95         .unlink         = qnx4_unlink,
96         .rmdir          = qnx4_rmdir,
97 #endif
98 };