writev.c

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/*
 * JFFS2 -- Journalling Flash File System, Version 2.
 *
 * Copyright © 2001-2007 Red Hat, Inc.
 *
 * Created by David Woodhouse <[email protected]>
 *
 * For licensing information, see the file 'LICENCE' in this directory.
 *
 */

#include <linux/kernel.h>
#include <linux/mtd/mtd.h>
#include "nodelist.h"

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;
            }
        }
    }

    return mtd_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;
    ret = mtd_write(c->mtd, ofs, len, retlen, buf);

    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;
        }
    }
    return ret;
}