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authorAlan D. Brunelle <Alan.Brunelle@hp.com>2007-08-07 15:30:23 +0200
committerJens Axboe <jens.axboe@oracle.com>2007-08-11 22:34:48 +0200
commitc7149d6bce2561aeaa48caaa1700aa8b3b22008f (patch)
treecfaeda02f5bb62ccf290369b5bd3a5d3f3801cf9 /include
parentec05b297f91a443aa26b74059b573bfad49c9ebb (diff)
Fix remap handling by blktrace
This patch provides more information concerning REMAP operations on block IOs. The additional information provides clearer details at the user level, and supports post-processing analysis in btt. o Adds in partition remaps on the same device. o Fixed up the remap information in DM to be in the right order o Sent up mapped-from and mapped-to device information Signed-off-by: Alan D. Brunelle <alan.brunelle@hp.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/blktrace_api.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h
index 90874a5d7d7..7b5d56b82b5 100644
--- a/include/linux/blktrace_api.h
+++ b/include/linux/blktrace_api.h
@@ -105,7 +105,7 @@ struct blk_io_trace {
*/
struct blk_io_trace_remap {
__be32 device;
- u32 __pad;
+ __be32 device_from;
__be64 sector;
};
@@ -272,6 +272,7 @@ static inline void blk_add_trace_remap(struct request_queue *q, struct bio *bio,
return;
r.device = cpu_to_be32(dev);
+ r.device_from = cpu_to_be32(bio->bi_bdev->bd_dev);
r.sector = cpu_to_be64(to);
__blk_add_trace(bt, from, bio->bi_size, bio->bi_rw, BLK_TA_REMAP, !bio_flagged(bio, BIO_UPTODATE), sizeof(r), &r);