2 * QNX4 file system, Linux implementation.
6 * Using parts of the xiafs filesystem.
10 * 28-05-1998 by Richard Frowijn : first release.
11 * 20-06-1998 by Frank Denis : Linux 2.1.99+ & dcache support.
14 #include <linux/config.h>
15 #include <linux/string.h>
16 #include <linux/errno.h>
18 #include <linux/qnx4_fs.h>
19 #include <linux/stat.h>
21 #include <asm/segment.h>
23 static int qnx4_readdir(struct file *filp, void *dirent, filldir_t filldir)
25 struct inode *inode = filp->f_dentry->d_inode;
27 struct buffer_head *bh;
28 struct qnx4_inode_entry *de;
29 struct qnx4_link_info *le;
34 QNX4DEBUG(("qnx4_readdir:i_size = %ld\n", (long) inode->i_size));
35 QNX4DEBUG(("filp->f_pos = %ld\n", (long) filp->f_pos));
37 while (filp->f_pos < inode->i_size) {
38 blknum = qnx4_block_map( inode, filp->f_pos >> QNX4_BLOCK_SIZE_BITS );
39 bh = sb_bread(inode->i_sb, blknum);
41 printk(KERN_ERR "qnx4_readdir: bread failed (%ld)\n", blknum);
44 ix = (int)(filp->f_pos >> QNX4_DIR_ENTRY_SIZE_BITS) % QNX4_INODES_PER_BLOCK;
45 while (ix < QNX4_INODES_PER_BLOCK) {
46 offset = ix * QNX4_DIR_ENTRY_SIZE;
47 de = (struct qnx4_inode_entry *) (bh->b_data + offset);
48 size = strlen(de->di_fname);
50 if ( !( de->di_status & QNX4_FILE_LINK ) && size > QNX4_SHORT_NAME_MAX )
51 size = QNX4_SHORT_NAME_MAX;
52 else if ( size > QNX4_NAME_MAX )
55 if ( ( de->di_status & (QNX4_FILE_USED|QNX4_FILE_LINK) ) != 0 ) {
56 QNX4DEBUG(("qnx4_readdir:%.*s\n", size, de->di_fname));
57 if ( ( de->di_status & QNX4_FILE_LINK ) == 0 )
58 ino = blknum * QNX4_INODES_PER_BLOCK + ix - 1;
60 le = (struct qnx4_link_info*)de;
61 ino = ( le->dl_inode_blk - 1 ) *
62 QNX4_INODES_PER_BLOCK +
65 if (filldir(dirent, de->di_fname, size, filp->f_pos, ino, DT_UNKNOWN) < 0) {
72 filp->f_pos += QNX4_DIR_ENTRY_SIZE;
81 struct file_operations qnx4_dir_operations =
83 read: generic_read_dir,
84 readdir: qnx4_readdir,
88 struct inode_operations qnx4_dir_inode_operations =
91 #ifdef CONFIG_QNX4FS_RW