diff options
Diffstat (limited to 'fs/jffs2/writev.c')
| -rw-r--r-- | fs/jffs2/writev.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/fs/jffs2/writev.c b/fs/jffs2/writev.c new file mode 100644 index 000000000000..f079f8388566 --- /dev/null +++ b/fs/jffs2/writev.c @@ -0,0 +1,50 @@ +/* + * 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); +} + |