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authorAlan D. Brunelle <Alan.Brunelle@hp.com>2007-08-07 09:30:23 -0400
committerJens Axboe <jens.axboe@oracle.com>2007-08-11 16:34:48 -0400
commitc7149d6bce2561aeaa48caaa1700aa8b3b22008f (patch)
treecfaeda02f5bb62ccf290369b5bd3a5d3f3801cf9 /include/linux
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/linux')
-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 90874a5d7d78..7b5d56b82b59 100644
--- a/include/linux/blktrace_api.h
+++ b/include/linux/blktrace_api.h
@@ -105,7 +105,7 @@ struct blk_io_trace {
105 */ 105 */
106struct blk_io_trace_remap { 106struct blk_io_trace_remap {
107 __be32 device; 107 __be32 device;
108 u32 __pad; 108 __be32 device_from;
109 __be64 sector; 109 __be64 sector;
110}; 110};
111 111
@@ -272,6 +272,7 @@ static inline void blk_add_trace_remap(struct request_queue *q, struct bio *bio,
272 return; 272 return;
273 273
274 r.device = cpu_to_be32(dev); 274 r.device = cpu_to_be32(dev);
275 r.device_from = cpu_to_be32(bio->bi_bdev->bd_dev);
275 r.sector = cpu_to_be64(to); 276 r.sector = cpu_to_be64(to);
276 277
277 __blk_add_trace(bt, from, bio->bi_size, bio->bi_rw, BLK_TA_REMAP, !bio_flagged(bio, BIO_UPTODATE), sizeof(r), &r); 278 __blk_add_trace(bt, from, bio->bi_size, bio->bi_rw, BLK_TA_REMAP, !bio_flagged(bio, BIO_UPTODATE), sizeof(r), &r);