2 * JFFS2 -- Journalling Flash File System, Version 2.
4 * Copyright (C) 2001, 2002 Red Hat, Inc.
6 * Created by David Woodhouse <dwmw2@infradead.org>
8 * For licensing information, see the file 'LICENCE' in this directory.
10 * $Id: writev.c,v 1.7 2005/09/07 08:34:55 havasi Exp $
14 #include <linux/kernel.h>
15 #include <linux/mtd/mtd.h>
18 /* This ought to be in core MTD code. All registered MTD devices
19 without writev should have this put in place. Bug the MTD
21 static inline int mtd_fake_writev(struct mtd_info
*mtd
, const struct kvec
*vecs
,
22 unsigned long count
, loff_t to
, size_t *retlen
)
25 size_t totlen
= 0, thislen
;
28 for (i
=0; i
<count
; i
++) {
31 ret
= mtd
->write(mtd
, to
, vecs
[i
].iov_len
, &thislen
, vecs
[i
].iov_base
);
33 if (ret
|| thislen
!= vecs
[i
].iov_len
)
35 to
+= vecs
[i
].iov_len
;
42 int jffs2_flash_direct_writev(struct jffs2_sb_info
*c
, const struct kvec
*vecs
,
43 unsigned long count
, loff_t to
, size_t *retlen
)
46 return c
->mtd
->writev(c
->mtd
, vecs
, count
, to
, retlen
);
48 if (jffs2_sum_active()) {
51 res
= jffs2_sum_add_kvec(c
, vecs
, count
, (uint32_t) to
);
57 return mtd_fake_writev(c
->mtd
, vecs
, count
, to
, retlen
);
61 int jffs2_flash_direct_write(struct jffs2_sb_info
*c
, loff_t ofs
, size_t len
,
62 size_t *retlen
, const u_char
*buf
)
65 ret
= c
->mtd
->write(c
->mtd
, ofs
, len
, retlen
, buf
);
67 if (jffs2_sum_active()) {
71 vecs
[0].iov_base
= (unsigned char *) buf
;
72 vecs
[0].iov_len
= len
;
74 res
= jffs2_sum_add_kvec(c
, vecs
, 1, (uint32_t) ofs
);
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