1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
/*
* 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);
}
|
