linux-kernel - [PATCH v3 25/26] bio-integrity: Add explicit field for owner of bip

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1348526106-17074-26-git-send-email-koverstreet@google.com>
Date:	Mon, 24 Sep 2012 15:35:05 -0700
From:	Kent Overstreet <koverstreet@...gle.com>
To:	linux-bcache@...r.kernel.org, linux-kernel@...r.kernel.org,
	dm-devel@...hat.com
Cc:	Kent Overstreet <koverstreet@...gle.com>, tj@...nel.org,
	axboe@...nel.dk, neilb@...e.de, vgoyal@...hat.com,
	"Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [PATCH v3 25/26] bio-integrity: Add explicit field for owner of bip_buf

This was the only real user of BIO_CLONED, which didn't have very clear
semantics. Convert to its own flag so we can get rid of BIO_CLONED.

Signed-off-by: Kent Overstreet <koverstreet@...gle.com>
CC: Jens Axboe <axboe@...nel.dk>
CC: Martin K. Petersen <martin.petersen@...cle.com>
---
 fs/bio-integrity.c  | 5 ++---
 include/linux/bio.h | 1 +
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/bio-integrity.c b/fs/bio-integrity.c
index f175814..c5f33b4 100644
--- a/fs/bio-integrity.c
+++ b/fs/bio-integrity.c
@@ -95,9 +95,7 @@ void bio_integrity_free(struct bio *bio)
 	struct bio_integrity_payload *bip = bio->bi_integrity;
 	struct bio_set *bs = bio->bi_pool;
 
-	/* A cloned bio doesn't own the integrity metadata */
-	if (!bio_flagged(bio, BIO_CLONED) && !bio_flagged(bio, BIO_FS_INTEGRITY)
-	    && bip->bip_buf != NULL)
+	if (bip->bip_owns_buf)
 		kfree(bip->bip_buf);
 
 	if (bs) {
@@ -384,6 +382,7 @@ int bio_integrity_prep(struct bio *bio)
 		return -EIO;
 	}
 
+	bip->bip_owns_buf = 1;
 	bip->bip_buf = buf;
 	bip->bip_size = len;
 	bip->bip_sector = bio->bi_sector;
diff --git a/include/linux/bio.h b/include/linux/bio.h
index bd130b6..d316fb3 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -178,6 +178,7 @@ struct bio_integrity_payload {
 	unsigned short		bip_slab;	/* slab the bip came from */
 	unsigned short		bip_vcnt;	/* # of integrity bio_vecs */
 	unsigned short		bip_idx;	/* current bip_vec index */
+	unsigned		bip_owns_buf:1;	/* should free bip_buf */
 
 	struct work_struct	bip_work;	/* I/O completion */
 
-- 
1.7.12

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/