[PATCH] fat: support ->direct_IO()
This patch add to support of ->direct_IO() for mostly read.
The user of this seems to want to use for streaming read. So, current direct
I/O has limitation, it can only overwrite. (For write operation, mainly we
need to handle the hole etc..)
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/fat/dir.c b/fs/fat/dir.c
index 4ce7747..eef1b81 100644
--- a/fs/fat/dir.c
+++ b/fs/fat/dir.c
@@ -68,8 +68,8 @@
{
struct super_block *sb = dir->i_sb;
sector_t phys, iblock;
- int offset;
- int err;
+ unsigned long mapped_blocks;
+ int err, offset;
next:
if (*bh)
@@ -77,7 +77,7 @@
*bh = NULL;
iblock = *pos >> sb->s_blocksize_bits;
- err = fat_bmap(dir, iblock, &phys);
+ err = fat_bmap(dir, iblock, &phys, &mapped_blocks);
if (err || !phys)
return -1; /* beyond EOF or error */