1 /* 2 * JFFS2 -- Journalling Flash File System, Version 2. 3 * 4 * Copyright © 2001-2007 Red Hat, Inc. 5 * 6 * Created by David Woodhouse <dwmw2@infradead.org> 7 * 8 * For licensing information, see the file 'LICENCE' in this directory. 9 * 10 */ 11 12 #include <linux/kernel.h> 13 #include <linux/mtd/mtd.h> 14 #include "nodelist.h" 15 16 int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs, 17 unsigned long count, loff_t to, size_t *retlen) 18 { 19 if (!jffs2_is_writebuffered(c)) { 20 if (jffs2_sum_active()) { 21 int res; 22 res = jffs2_sum_add_kvec(c, vecs, count, (uint32_t) to); 23 if (res) { 24 return res; 25 } 26 } 27 } 28 29 if (c->mtd->writev) 30 return mtd_writev(c->mtd, vecs, count, to, retlen); 31 else { 32 return default_mtd_writev(c->mtd, vecs, count, to, retlen); 33 } 34 } 35 36 int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, 37 size_t *retlen, const u_char *buf) 38 { 39 int ret; 40 ret = mtd_write(c->mtd, ofs, len, retlen, buf); 41 42 if (jffs2_sum_active()) { 43 struct kvec vecs[1]; 44 int res; 45 46 vecs[0].iov_base = (unsigned char *) buf; 47 vecs[0].iov_len = len; 48 49 res = jffs2_sum_add_kvec(c, vecs, 1, (uint32_t) ofs); 50 if (res) { 51 return res; 52 } 53 } 54 return ret; 55 } 56