fs/affs/file.c: add support to O_DIRECT
Based on ext2_direct_IO Tested with O_DIRECT file open and sysbench/mariadb with 1% written queries improvement (update_non_index test) on a volume created with mkaffs. Signed-off-by: Fabian Frederick <fabf@skynet.be> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
1ee54b099a
commit
9abb408307
|
@ -12,6 +12,7 @@
|
||||||
* affs regular file handling primitives
|
* affs regular file handling primitives
|
||||||
*/
|
*/
|
||||||
|
|
||||||
|
#include <linux/aio.h>
|
||||||
#include "affs.h"
|
#include "affs.h"
|
||||||
|
|
||||||
#if PAGE_SIZE < 4096
|
#if PAGE_SIZE < 4096
|
||||||
|
@ -392,6 +393,22 @@ static void affs_write_failed(struct address_space *mapping, loff_t to)
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static ssize_t
|
||||||
|
affs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
|
||||||
|
loff_t offset)
|
||||||
|
{
|
||||||
|
struct file *file = iocb->ki_filp;
|
||||||
|
struct address_space *mapping = file->f_mapping;
|
||||||
|
struct inode *inode = mapping->host;
|
||||||
|
size_t count = iov_iter_count(iter);
|
||||||
|
ssize_t ret;
|
||||||
|
|
||||||
|
ret = blockdev_direct_IO(rw, iocb, inode, iter, offset, affs_get_block);
|
||||||
|
if (ret < 0 && (rw & WRITE))
|
||||||
|
affs_write_failed(mapping, offset + count);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
static int affs_write_begin(struct file *file, struct address_space *mapping,
|
static int affs_write_begin(struct file *file, struct address_space *mapping,
|
||||||
loff_t pos, unsigned len, unsigned flags,
|
loff_t pos, unsigned len, unsigned flags,
|
||||||
struct page **pagep, void **fsdata)
|
struct page **pagep, void **fsdata)
|
||||||
|
@ -418,6 +435,7 @@ const struct address_space_operations affs_aops = {
|
||||||
.writepage = affs_writepage,
|
.writepage = affs_writepage,
|
||||||
.write_begin = affs_write_begin,
|
.write_begin = affs_write_begin,
|
||||||
.write_end = generic_write_end,
|
.write_end = generic_write_end,
|
||||||
|
.direct_IO = affs_direct_IO,
|
||||||
.bmap = _affs_bmap
|
.bmap = _affs_bmap
|
||||||
};
|
};
|
||||||
|
|
||||||
|
|
Loading…
Reference in a new issue