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block: make __blkdev_direct_IO_sync() support O_SYNC/DSYNC 

Split the op setting code into a helper, use it in both places.

Signed-off-by: Jens Axboe <axboe@fb.com>
hifive-unleashed-5.1
Jens Axboe 2016-11-17 17:50:47 +01:00
parent 72ecad22d9
commit 78250c02d9
1 changed files with 12 additions and 2 deletions
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14
fs/block_dev.c
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@ -176,6 +176,16 @@ static struct inode *bdev_file_inode(struct file *file)
return file->f_mapping->host;
}
static unsigned int dio_bio_write_op(struct kiocb *iocb)
{
unsigned int op = REQ_OP_WRITE | REQ_SYNC | REQ_IDLE;
/* avoid the need for a I/O completion work item */
if (iocb->ki_flags & IOCB_DSYNC)
op |= REQ_FUA;
return op;
}
#define DIO_INLINE_BIO_VECS 4
static void blkdev_bio_end_io_simple(struct bio *bio)
@ -226,11 +236,11 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter,
ret = bio.bi_iter.bi_size;
if (iov_iter_rw(iter) == READ) {
bio_set_op_attrs(&bio, REQ_OP_READ, 0);
bio.bi_opf = REQ_OP_READ;
if (iter_is_iovec(iter))
should_dirty = true;
} else {
bio_set_op_attrs(&bio, REQ_OP_WRITE, REQ_SYNC | REQ_IDLE);
bio.bi_opf = dio_bio_write_op(iocb);
task_io_account_write(ret);
}