linux-kernel - [PATCH RFC v3 04/15] blk-crypto: fix missing processing for split bio

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Message-Id: <20250901033220.42982-5-yukuai1@huaweicloud.com>
Date: Mon,  1 Sep 2025 11:32:09 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
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Subject: [PATCH RFC v3 04/15] blk-crypto: fix missing processing for split bio

From: Yu Kuai <yukuai3@...wei.com>

1) trace_block_split() is missing and blktrace can't catch split events;
2) blkcg_bio_issue_init() is missing, and io-latency will not work
   correctly for split bio.

Fixes: 488f6682c832 ("block: blk-crypto-fallback for Inline Encryption")
Signed-off-by: Yu Kuai <yukuai3@...wei.com>
---
 block/blk-crypto-fallback.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/block/blk-crypto-fallback.c b/block/blk-crypto-fallback.c
index 005c9157ffb3..cae11c2f96c5 100644
--- a/block/blk-crypto-fallback.c
+++ b/block/blk-crypto-fallback.c
@@ -231,7 +231,10 @@ static bool blk_crypto_fallback_split_bio_if_needed(struct bio **bio_ptr)
 			bio->bi_status = BLK_STS_RESOURCE;
 			return false;
 		}
+
+		blkcg_bio_issue_init(split_bio);
 		bio_chain(split_bio, bio);
+		trace_block_split(split_bio, bio->bi_iter.bi_sector);
 		submit_bio_noacct(bio);
 		*bio_ptr = split_bio;
 	}
-- 
2.39.2