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direct-io: eliminate the offset argument to ->direct_IO

Browse source 
Including blkdev_direct_IO and dax_do_io.  It has to be ki_pos to actually
work, so eliminate the superflous argument.

Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Christoph Hellwig 2016-04-07 08:51:58 -07:00 • committed by Al Viro
commit c8b8e32d70
37 changed files with 99 additions and 112 deletions
Download patch file Download diff file Expand all files Collapse all files

3
fs/ext4/ext4.h
View file

@ -2581,8 +2581,7 @@ extern int ext4_get_next_extent(struct inode *inode, ext4_lblk_t lblk,
/* indirect.c */
extern int ext4_ind_map_blocks(handle_t *handle, struct inode *inode,
struct ext4_map_blocks *map, int flags);
extern ssize_t ext4_ind_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
loff_t offset);
extern ssize_t ext4_ind_direct_IO(struct kiocb *iocb, struct iov_iter *iter);
extern int ext4_ind_calc_metadata_amount(struct inode *inode, sector_t lblock);
extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks);
extern void ext4_ind_truncate(handle_t *, struct inode *inode);

12
fs/ext4/indirect.c
View file

@ -659,12 +659,12 @@ out:
* crashes then stale disk data _may_ be exposed inside the file. But current
* VFS code falls back into buffered path in that case so we are safe.
*/
ssize_t ext4_ind_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
loff_t offset)
ssize_t ext4_ind_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
struct ext4_inode_info *ei = EXT4_I(inode);
loff_t offset = iocb->ki_pos;
handle_t *handle;
ssize_t ret;
int orphan = 0;
@ -707,21 +707,21 @@ retry:
goto locked;
}
if (IS_DAX(inode))
ret = dax_do_io(iocb, inode, iter, offset,
ret = dax_do_io(iocb, inode, iter,
ext4_dio_get_block, NULL, 0);
else
ret = __blockdev_direct_IO(iocb, inode,
inode->i_sb->s_bdev, iter,
offset, ext4_dio_get_block,
ext4_dio_get_block,
NULL, NULL, 0);
inode_dio_end(inode);
} else {
locked:
if (IS_DAX(inode))
ret = dax_do_io(iocb, inode, iter, offset,
ret = dax_do_io(iocb, inode, iter,
ext4_dio_get_block, NULL, DIO_LOCKING);
else
ret = blockdev_direct_IO(iocb, inode, iter, offset,
ret = blockdev_direct_IO(iocb, inode, iter,
ext4_dio_get_block);
if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {

18
fs/ext4/inode.c
View file

@ -3334,12 +3334,12 @@ static int ext4_end_io_dio(struct kiocb *iocb, loff_t offset,
* if the machine crashes during the write.
*
*/
static ssize_t ext4_ext_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
loff_t offset)
static ssize_t ext4_ext_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
ssize_t ret;
loff_t offset = iocb->ki_pos;
size_t count = iov_iter_count(iter);
int overwrite = 0;
get_block_t *get_block_func = NULL;
@ -3348,7 +3348,7 @@ static ssize_t ext4_ext_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
/* Use the old path for reads and writes beyond i_size. */
if (iov_iter_rw(iter) != WRITE || final_size > inode->i_size)
return ext4_ind_direct_IO(iocb, iter, offset);
return ext4_ind_direct_IO(iocb, iter);
BUG_ON(iocb->private == NULL);
@ -3400,11 +3400,11 @@ static ssize_t ext4_ext_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
BUG_ON(ext4_encrypted_inode(inode) && S_ISREG(inode->i_mode));
#endif
if (IS_DAX(inode))
ret = dax_do_io(iocb, inode, iter, offset, get_block_func,
ret = dax_do_io(iocb, inode, iter, get_block_func,
ext4_end_io_dio, dio_flags);
else
ret = __blockdev_direct_IO(iocb, inode,
inode->i_sb->s_bdev, iter, offset,
inode->i_sb->s_bdev, iter,
get_block_func,
ext4_end_io_dio, NULL, dio_flags);
@ -3431,12 +3431,12 @@ static ssize_t ext4_ext_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
return ret;
}
static ssize_t ext4_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
loff_t offset)
static ssize_t ext4_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
size_t count = iov_iter_count(iter);
loff_t offset = iocb->ki_pos;
ssize_t ret;
#ifdef CONFIG_EXT4_FS_ENCRYPTION
@ -3456,9 +3456,9 @@ static ssize_t ext4_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
trace_ext4_direct_IO_enter(inode, offset, count, iov_iter_rw(iter));
if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
ret = ext4_ext_direct_IO(iocb, iter, offset);
ret = ext4_ext_direct_IO(iocb, iter);
else
ret = ext4_ind_direct_IO(iocb, iter, offset);
ret = ext4_ind_direct_IO(iocb, iter);
trace_ext4_direct_IO_exit(inode, offset, count, iov_iter_rw(iter), ret);
return ret;
}