diff options
| author | Fabian Frederick <fabf@skynet.be> | 2014-12-12 16:57:52 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-13 12:42:51 -0800 |
| commit | 9abb408307008a19be5719bbf1d069bb3ed7aa60 (patch) | |
| tree | ebd4358e5fdf9561a42c8cec11a6f3b994646948 | |
| parent | 1ee54b099acecb928bc76ea4beca668697b4a4d0 (diff) | |
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>
| -rw-r--r-- | fs/affs/file.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/fs/affs/file.c b/fs/affs/file.c index 8e510854f48..05005bd2621 100644 --- a/fs/affs/file.c +++ b/fs/affs/file.c @@ -12,6 +12,7 @@ * affs regular file handling primitives */ +#include <linux/aio.h> #include "affs.h" #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, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) @@ -418,6 +435,7 @@ const struct address_space_operations affs_aops = { .writepage = affs_writepage, .write_begin = affs_write_begin, .write_end = generic_write_end, + .direct_IO = affs_direct_IO, .bmap = _affs_bmap }; |