1 files changed, 99 insertions, 0 deletions
diff --git a/fs/qnx4/dir.c b/fs/qnx4/dir.c
new file mode 100644
index 000000000000..cd66147cca04
--- /dev/null
+++ b/fs/qnx4/dir.c
@@ -0,0 +1,99 @@
+/*
+ * QNX4 file system, Linux implementation.
+ *
+ * Version : 0.2.1
+ *
+ * Using parts of the xiafs filesystem.
+ *
+ * History :
+ *
+ * 28-05-1998 by Richard Frowijn : first release.
+ * 20-06-1998 by Frank Denis : Linux 2.1.99+ & dcache support.
+ */
+
+#include <linux/config.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/qnx4_fs.h>
+#include <linux/stat.h>
+#include <linux/smp_lock.h>
+#include <linux/buffer_head.h>
+
+
+static int qnx4_readdir(struct file *filp, void *dirent, filldir_t filldir)
+{
+	struct inode *inode = filp->f_dentry->d_inode;
+	unsigned int offset;
+	struct buffer_head *bh;
+	struct qnx4_inode_entry *de;
+	struct qnx4_link_info *le;
+	unsigned long blknum;
+	int ix, ino;
+	int size;
+
+	QNX4DEBUG(("qnx4_readdir:i_size = %ld\n", (long) inode->i_size));
+	QNX4DEBUG(("filp->f_pos         = %ld\n", (long) filp->f_pos));
+
+	lock_kernel();
+
+	while (filp->f_pos < inode->i_size) {
+		blknum = qnx4_block_map( inode, filp->f_pos >> QNX4_BLOCK_SIZE_BITS );
+		bh = sb_bread(inode->i_sb, blknum);
+		if(bh==NULL) {
+			printk(KERN_ERR "qnx4_readdir: bread failed (%ld)\n", blknum);
+			break;
+		}
+		ix = (int)(filp->f_pos >> QNX4_DIR_ENTRY_SIZE_BITS) % QNX4_INODES_PER_BLOCK;
+		while (ix < QNX4_INODES_PER_BLOCK) {
+			offset = ix * QNX4_DIR_ENTRY_SIZE;
+			de = (struct qnx4_inode_entry *) (bh->b_data + offset);
+			size = strlen(de->di_fname);
+			if (size) {
+				if ( !( de->di_status & QNX4_FILE_LINK ) && size > QNX4_SHORT_NAME_MAX )
+					size = QNX4_SHORT_NAME_MAX;
+				else if ( size > QNX4_NAME_MAX )
+					size = QNX4_NAME_MAX;
+
+				if ( ( de->di_status & (QNX4_FILE_USED|QNX4_FILE_LINK) ) != 0 ) {
+					QNX4DEBUG(("qnx4_readdir:%.*s\n", size, de->di_fname));
+					if ( ( de->di_status & QNX4_FILE_LINK ) == 0 )
+						ino = blknum * QNX4_INODES_PER_BLOCK + ix - 1;
+					else {
+						le  = (struct qnx4_link_info*)de;
+						ino = ( le->dl_inode_blk - 1 ) *
+							QNX4_INODES_PER_BLOCK +
+							le->dl_inode_ndx;
+					}
+					if (filldir(dirent, de->di_fname, size, filp->f_pos, ino, DT_UNKNOWN) < 0) {
+						brelse(bh);
+						goto out;
+					}
+				}
+			}
+			ix++;
+			filp->f_pos += QNX4_DIR_ENTRY_SIZE;
+		}
+		brelse(bh);
+	}
+out:
+	unlock_kernel();
+	return 0;
+}
+
+struct file_operations qnx4_dir_operations =
+{
+	.read		= generic_read_dir,
+	.readdir	= qnx4_readdir,
+	.fsync		= file_fsync,
+};
+
+struct inode_operations qnx4_dir_inode_operations =
+{
+	.lookup		= qnx4_lookup,
+#ifdef CONFIG_QNX4FS_RW
+	.create		= qnx4_create,
+	.unlink		= qnx4_unlink,
+	.rmdir		= qnx4_rmdir,
+#endif
+};