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
+};