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SubjectRe: [PATCH 3/6] direct-io: add support for write stream IDs
On Tue, Mar 24, 2015 at 09:27:00AM -0600, Jens Axboe wrote:
> Get the streamid from the file, if any, and set it on the bio.
>
> Signed-off-by: Jens Axboe <axboe@fb.com>
> ---
> fs/direct-io.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/fs/direct-io.c b/fs/direct-io.c
> index e181b6b2e297..5d2750346451 100644
> --- a/fs/direct-io.c
> +++ b/fs/direct-io.c
> @@ -77,6 +77,7 @@ struct dio_submit {
> int reap_counter; /* rate limit reaping */
> sector_t final_block_in_request;/* doesn't change */
> int boundary; /* prev block is at a boundary */
> + int streamid; /* Write stream ID */
> get_block_t *get_block; /* block mapping function */
> dio_submit_t *submit_io; /* IO submition function */
>
> @@ -372,6 +373,8 @@ dio_bio_alloc(struct dio *dio, struct dio_submit *sdio,
>
> sdio->bio = bio;
> sdio->logical_offset_in_bio = sdio->cur_page_fs_offset;
> +
> + bio_set_streamid(bio, sdio->streamid);
> }
>
> /*
> @@ -1205,6 +1208,7 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
> sdio.blkbits = blkbits;
> sdio.blkfactor = i_blkbits - blkbits;
> sdio.block_in_file = offset >> blkbits;
> + sdio.streamid = iocb->ki_filp->f_streamid;

If iocb->ki_filp->f_streamid is not set, then it should fall back to
whatever is set on the inode->i_streamid.

Cheers,

Dave.
--
Dave Chinner
david@fromorbit.com


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