Import of Linus's Linux 1.1.68

1 files changed, 103 insertions, 0 deletions

diff --git a/fs/umsdos/file.c b/fs/umsdos/file.c
new file mode 100644
index 000000000..d292ea3c2
--- /dev/null
+++ b/fs/umsdos/file.c
@@ -0,0 +1,103 @@
+/*
+ *  linux/fs/umsdos/file.c
+ *
+ *  Written 1993 by Jacques Gelinas
+ *	inspired from linux/fs/msdos/file.c Werner Almesberger
+ *
+ *  Extended MS-DOS regular file handling primitives
+ */
+
+#include <asm/segment.h>
+#include <asm/system.h>
+
+#include <linux/sched.h>
+#include <linux/fs.h>
+#include <linux/msdos_fs.h>
+#include <linux/errno.h>
+#include <linux/fcntl.h>
+#include <linux/stat.h>
+#include <linux/msdos_fs.h>
+#include <linux/umsdos_fs.h>
+
+
+#define PRINTK(x)
+#define Printk(x)	printk x
+/*
+	Read a file into user space memory
+*/
+static int UMSDOS_file_read(
+	struct inode *inode,
+	struct file *filp,
+	char *buf,
+    int count)
+{
+	/* We have to set the access time because msdos don't care */
+	int ret = msdos_file_read(inode,filp,buf,count);
+	inode->i_atime = CURRENT_TIME;
+	inode->i_dirt = 1;
+	return ret;
+}
+/*
+	Write a file from user space memory
+*/
+static int UMSDOS_file_write(
+	struct inode *inode,
+	struct file *filp,
+	char *buf,
+    int count)
+{
+	return msdos_file_write(inode,filp,buf,count);
+}
+/*
+	Truncate a file to 0 length.
+*/
+static void UMSDOS_truncate(struct inode *inode)
+{
+	PRINTK (("UMSDOS_truncate\n"));
+	msdos_truncate (inode);
+	inode->i_ctime = inode->i_mtime = CURRENT_TIME;
+	inode->i_dirt = 1;
+}
+/*
+	See inode.c
+	
+	Some entry point are filled dynamically with function pointers
+	from the msdos file_operations and file_inode_operations.
+	
+	The idea is to have the code as independent as possible from
+	the msdos file system.
+*/
+
+struct file_operations umsdos_file_operations = {
+	NULL,				/* lseek - default */
+	UMSDOS_file_read,	/* read */
+	UMSDOS_file_write,	/* write */
+	NULL,				/* readdir - bad */
+	NULL,				/* select - default */
+	NULL,				/* ioctl - default */
+	generic_mmap,			/* mmap */
+	NULL,				/* no special open is needed */
+	NULL,				/* release */
+	file_fsync			/* fsync */
+};
+
+struct inode_operations umsdos_file_inode_operations = {
+	&umsdos_file_operations,	/* default file operations */
+	NULL,			/* create */
+	NULL,			/* lookup */
+	NULL,			/* link */
+	NULL,			/* unlink */
+	NULL,			/* symlink */
+	NULL,			/* mkdir */
+	NULL,			/* rmdir */
+	NULL,			/* mknod */
+	NULL,			/* rename */
+	NULL,			/* readlink */
+	NULL,			/* follow_link */
+	NULL,			/* bmap */
+	UMSDOS_truncate,/* truncate */
+	NULL,			/* permission */
+	msdos_smap		/* smap */
+};
+
+