Re: [PATCH 3/6] direct-io: add support for write stream IDs

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On 03/24/2015 08:43 PM, Dave Chinner wrote:
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@xxxxxx>
---
  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.

Good point, agree. Will make that change.


--
Jens Axboe

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