51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
|
/*
|
||
|
|
* 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 1.6 2004/11/16 20:36:12 dwmw2 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 (c->mtd->writev)
|
||
|
|
return c->mtd->writev(c->mtd, vecs, count, to, retlen);
|
||
|
|
else
|
||
|
|
return mtd_fake_writev(c->mtd, vecs, count, to, retlen);
|
||
|
|
}
|
||
|
|
|