1 files changed, 82 insertions, 0 deletions
diff --git a/linux-2.4.x/fs/jffs2/writev.c b/linux-2.4.x/fs/jffs2/writev.c
new file mode 100644
index 0000000..8f67bbd
--- /dev/null
+++ b/linux-2.4.x/fs/jffs2/writev.c
@@ -0,0 +1,82 @@
+/*
+ * JFFS2 -- Journalling Flash File System, Version 2.
+ *
+ * Copyright (C) 2001, 2002 Red Hat, Inc.
+ *
+ * Created by David Woodhouse <dwmw2@infradead.org>
+ *
+ * For licensing information, see the file 'LICENCE' in this directory.
+ *
+ * $Id: writev.c,v 1.9 2006/03/22 15:03:25 havasi Exp $
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/mtd/mtd.h>
+#include "nodelist.h"
+
+/* This ought to be in core MTD code. All registered MTD devices
+   without writev should have this put in place. Bug the MTD
+   maintainer */
+static inline int mtd_fake_writev(struct mtd_info *mtd, const struct kvec *vecs,
+				  unsigned long count, loff_t to, size_t *retlen)
+{
+	unsigned long i;
+	size_t totlen = 0, thislen;
+	int ret = 0;
+
+	for (i=0; i<count; i++) {
+		if (!vecs[i].iov_len)
+			continue;
+		ret = mtd->write(mtd, to, vecs[i].iov_len, &thislen, vecs[i].iov_base);
+		totlen += thislen;
+		if (ret || thislen != vecs[i].iov_len)
+			break;
+		to += vecs[i].iov_len;
+	}
+	if (retlen)
+		*retlen = totlen;
+	return ret;
+}
+
+int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs,
+			      unsigned long count, loff_t to, size_t *retlen)
+{
+	if (!jffs2_is_writebuffered(c)) {
+		if (jffs2_sum_active()) {
+			int res;
+			res = jffs2_sum_add_kvec(c, vecs, count, (uint32_t) to);
+			if (res) {
+				return res;
+			}
+		}
+	}
+
+	if (c->mtd->writev)
+		return c->mtd->writev(c->mtd, vecs, count, to, retlen);
+	else {
+		return mtd_fake_writev(c->mtd, vecs, count, to, retlen);
+	}
+}
+
+int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len,
+			size_t *retlen, const u_char *buf)
+{
+	int ret;
+
+	if (jffs2_sum_active()) {
+		struct kvec vecs[1];
+		int res;
+
+		vecs[0].iov_base = (unsigned char *) buf;
+		vecs[0].iov_len = len;
+
+		res = jffs2_sum_add_kvec(c, vecs, 1, (uint32_t) ofs);
+		if (res) {
+			return res;
+		}
+	}
+
+	ret = c->mtd->write(c->mtd, ofs, len, retlen, buf);
+	return ret;
+}