1 files changed, 88 insertions, 0 deletions
diff --git a/kernel/file.c b/kernel/file.c
new file mode 100644
index 0000000..df3a863
--- /dev/null
+++ b/kernel/file.c
@@ -0,0 +1,88 @@
+/*
+    FUSE: Filesystem in Userspace
+    Copyright (C) 2001  Miklos Szeredi (mszeredi@inf.bme.hu)
+
+    This program can be distributed under the terms of the GNU GPL.
+    See the file COPYING.
+*/
+#include "fuse_i.h"
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pagemap.h>
+
+
+static int fuse_open(struct inode *inode, struct file *file)
+{
+	struct fuse_conn *fc = INO_FC(inode);
+	struct fuse_in in = FUSE_IN_INIT;
+	struct fuse_out out = FUSE_OUT_INIT;
+	struct fuse_open_in arg;
+
+	arg.flags = file->f_flags & ~O_EXCL;
+	in.h.opcode = FUSE_OPEN;
+	in.h.ino = inode->i_ino;
+	in.argsize = sizeof(arg);
+	in.arg = &arg;
+	request_send(fc, &in, &out);
+
+	return out.h.error;
+}
+
+static int fuse_readpage(struct file *file, struct page *page)
+{
+	struct inode *inode = page->mapping->host;
+	struct fuse_conn *fc = INO_FC(inode);
+	struct fuse_in in = FUSE_IN_INIT;
+	struct fuse_out out = FUSE_OUT_INIT;
+	struct fuse_read_in arg;
+	char *buffer;
+
+	buffer = kmap(page);
+
+	arg.offset = page->index << PAGE_CACHE_SHIFT;
+	arg.size = PAGE_CACHE_SIZE;
+
+	in.h.opcode = FUSE_READ;
+	in.h.ino = inode->i_ino;
+	in.argsize = sizeof(arg);
+	in.arg = &arg;
+	out.argsize = PAGE_CACHE_SIZE;
+	out.argvar = 1;
+	out.arg = buffer;
+
+	request_send(fc, &in, &out);
+	if(!out.h.error) {
+		if(out.argsize < PAGE_CACHE_SIZE) 
+			memset(buffer + out.argsize, 0,
+			       PAGE_CACHE_SIZE - out.argsize);
+		SetPageUptodate(page);
+	}
+
+	kunmap(page);
+	UnlockPage(page);
+
+	return out.h.error;
+}
+
+static struct file_operations fuse_file_operations = {
+	open:		fuse_open,
+	read:		generic_file_read,
+};
+
+static struct address_space_operations fuse_file_aops  = {
+	readpage:	fuse_readpage,
+};
+
+void fuse_init_file_inode(struct inode *inode)
+{
+	inode->i_fop = &fuse_file_operations;
+	inode->i_data.a_ops = &fuse_file_aops;
+}
+
+/* 
+ * Local Variables:
+ * indent-tabs-mode: t
+ * c-basic-offset: 8
+ * End:
+ */