patch-2.1.120 linux/fs/qnx4/dir.c

• Lines: 127
• Date: Tue Sep 1 10:43:13 1998
• Orig file: v2.1.119/linux/fs/qnx4/dir.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.119/linux/fs/qnx4/dir.c linux/fs/qnx4/dir.c
@@ -0,0 +1,126 @@
+/* 
+ * QNX4 file system, Linux implementation.
+ * 
+ * Version : 0.1
+ * 
+ * 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 <asm/segment.h>
+
+static int qnx4_readdir(struct file *filp, void *dirent, filldir_t filldir);
+
+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;
+	long blknum;
+	int i;
+	int size;
+
+	blknum = inode->u.qnx4_i.i_first_xtnt.xtnt_blk - 1 +
+	    ((filp->f_pos >> 6) >> 3);
+
+	if (!inode || !inode->i_sb || !S_ISDIR(inode->i_mode)) {
+		return -EBADF;
+	}
+	QNX4DEBUG(("qnx4_readdir:i_size = %ld\n", (long) inode->i_size));
+	QNX4DEBUG(("filp->f_pos         = %ld\n", (long) filp->f_pos));
+	QNX4DEBUG(("BlkNum              = %ld\n", (long) blknum));
+
+	while (filp->f_pos < inode->i_size) {
+		bh = bread(inode->i_dev, blknum, QNX4_BLOCK_SIZE);
+		i = (filp->f_pos - (((filp->f_pos >> 6) >> 3) << 9)) & 0x3f;
+		while (i < QNX4_INODES_PER_BLOCK) {
+			offset = i * QNX4_DIR_ENTRY_SIZE;
+			de = (struct qnx4_inode_entry *) (bh->b_data + offset);
+			size = strlen(de->di_fname);
+			if (size) {
+
+				QNX4DEBUG(("qnx4_readdir:%s\n", de->di_fname));
+
+				if ((de->di_mode) || (de->di_status == QNX4_FILE_LINK)) {
+					if (de->di_status) {
+						if (filldir(dirent, de->di_fname, size, filp->f_pos, de->di_first_xtnt.xtnt_blk) < 0) {
+							brelse(bh);
+							return 0;
+						}
+					}
+				}
+			}
+			i++;
+			filp->f_pos += QNX4_DIR_ENTRY_SIZE;
+		}
+		brelse(bh);
+		blknum++;
+	}
+	UPDATE_ATIME(inode);
+
+	return 0;
+}
+
+static struct file_operations qnx4_dir_operations =
+{
+	NULL,			/* lseek - default */
+	NULL,			/* read */
+	NULL,			/* write - bad */
+	qnx4_readdir,		/* readdir */
+	NULL,			/* poll - default */
+	NULL,			/* ioctl - default */
+	NULL,			/* mmap */
+	NULL,			/* no special open code */
+        NULL,                   /* no special flush code */
+	NULL,			/* no special release code */
+	file_fsync,		/* default fsync */
+	NULL,			/* default fasync */
+	NULL,			/* default check_media_change */
+	NULL,			/* default revalidate */
+};
+
+struct inode_operations qnx4_dir_inode_operations =
+{
+	&qnx4_dir_operations,
+#ifdef CONFIG_QNX4FS_RW
+	qnx4_create,
+#else
+	NULL,			/* create */
+#endif
+	qnx4_lookup,
+	NULL,			/* link */
+#ifdef CONFIG_QNX4FS_RW
+	qnx4_unlink,		/* unlink */
+#else
+	NULL,
+#endif
+	NULL,			/* symlink */
+	NULL,			/* mkdir */
+#ifdef CONFIG_QNX4FS_RW
+	qnx4_rmdir,		/* rmdir */
+#else
+	NULL,
+#endif
+	NULL,			/* mknod */
+	NULL,			/* rename */
+	NULL,			/* readlink */
+	NULL,			/* follow_link */
+	NULL,			/* readpage */
+	NULL,			/* writepage */
+	NULL,			/* bmap */
+	NULL,			/* truncate */
+	NULL,			/* permission */
+	NULL			/* smap */
+};