linux-kernel - [PATCH 3/7] direct-io: add support for write stream IDs

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Date:	Sat, 18 Apr 2015 14:03:05 -0600
From:	Jens Axboe <axboe@...com>
To:	<axboe@...nel.dk>, <linux-kernel@...r.kernel.org>,
	<linux-fsdevel@...r.kernel.org>
CC:	<ming.l@....samsung.com>, <adilger@...ger.c>,
	<david@...morbit.com>, Jens Axboe <axboe@...com>
Subject: [PATCH 3/7] direct-io: add support for write stream IDs

Get the streamid from the file, if any, and set it on the bio.

Signed-off-by: Jens Axboe <axboe@...com>
---
 fs/direct-io.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/direct-io.c b/fs/direct-io.c
index c3b560b24a46..d318a143b186 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -76,6 +76,7 @@ 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 */
 
@@ -371,6 +372,8 @@ 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);
 }
 
 /*
@@ -1201,6 +1204,7 @@ do_blockdev_direct_IO(struct kiocb *iocb, struct inode *inode,
 	sdio.blkbits = blkbits;
 	sdio.blkfactor = i_blkbits - blkbits;
 	sdio.block_in_file = offset >> blkbits;
+	sdio.streamid = file_streamid(iocb->ki_filp);
 
 	sdio.get_block = get_block;
 	dio->end_io = end_io;
-- 
2.4.0.rc2.1.g3d6bc9a

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