From: Philipp Reisner <philipp.reisner@linbit.com>
To: linux-kernel@vger.kernel.org, Jens Axboe <axboe@kernel.dk>
Cc: drbd-dev@lists.linbit.com
Subject: [PATCH 02/13] drbd: protect updates to integrits_tfm by tconn->data->mutex
Date: Mon, 10 Oct 2011 13:54:55 +0200 [thread overview]
Message-ID: <1318247706-7732-3-git-send-email-philipp.reisner@linbit.com> (raw)
In-Reply-To: <1318247706-7732-1-git-send-email-philipp.reisner@linbit.com>
Since we need to hold that mutex anyways to make sure the peer
gets that change in the right position in the data stream,
it makes a lot of sense to use the same mutex to ensure existence
of the tfm.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
---
drivers/block/drbd/drbd_int.h | 2 +-
drivers/block/drbd/drbd_main.c | 9 +++++----
2 files changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index e167228..c59012f 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -848,7 +848,7 @@ struct drbd_tconn { /* is a resource from the config file */
struct list_head out_of_sequence_requests;
struct crypto_hash *cram_hmac_tfm;
- struct crypto_hash *integrity_tfm; /* checksums we compute */
+ struct crypto_hash *integrity_tfm; /* checksums we compute, updates protected by tconn->data->mutex */
struct crypto_hash *peer_integrity_tfm; /* checksums we verify */
struct crypto_hash *csums_tfm;
struct crypto_hash *verify_tfm;
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 939d31b..7c806b9 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -1720,11 +1720,11 @@ int drbd_send_dblock(struct drbd_conf *mdev, struct drbd_request *req)
int dgs;
int err;
+ sock = &mdev->tconn->data;
+ p = drbd_prepare_command(mdev, sock);
dgs = (mdev->tconn->agreed_pro_version >= 87 && mdev->tconn->integrity_tfm) ?
crypto_hash_digestsize(mdev->tconn->integrity_tfm) : 0;
- sock = &mdev->tconn->data;
- p = drbd_prepare_command(mdev, sock);
if (!p)
return -EIO;
p->sector = cpu_to_be64(req->i.sector);
@@ -1793,11 +1793,12 @@ int drbd_send_block(struct drbd_conf *mdev, enum drbd_packet cmd,
int err;
int dgs;
+ sock = &mdev->tconn->data;
+ p = drbd_prepare_command(mdev, sock);
+
dgs = (mdev->tconn->agreed_pro_version >= 87 && mdev->tconn->integrity_tfm) ?
crypto_hash_digestsize(mdev->tconn->integrity_tfm) : 0;
- sock = &mdev->tconn->data;
- p = drbd_prepare_command(mdev, sock);
if (!p)
return -EIO;
p->sector = cpu_to_be64(peer_req->i.sector);
--
1.7.4.1
next prev parent reply other threads:[~2011-10-10 11:55 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-10 11:54 [RFC 00/13] drbd: part 17 of adding multiple volume support to drbd Philipp Reisner
2011-10-10 11:54 ` [PATCH 01/13] drbd: Refuse to change network options online when Philipp Reisner
2011-10-10 11:54 ` Philipp Reisner [this message]
2011-10-10 11:54 ` [PATCH 03/13] drbd: Made cmp_after_sb() more generic into convert_after_sb() Philipp Reisner
2011-10-10 11:54 ` [PATCH 04/13] drbd: Allocation of int_dig_in and int_dig_vv was missing Philipp Reisner
2011-10-10 11:54 ` [PATCH 05/13] drbd: Receiving part for the PROTOCOL_UPDATE packet Philipp Reisner
2011-10-10 11:54 ` [PATCH 06/13] drbd: Send PROTOCOL_UPDATE packets when appropriate Philipp Reisner
2011-10-10 11:55 ` [PATCH 07/13] drbd: Use more generic constant names Philipp Reisner
2011-10-10 11:55 ` [PATCH 08/13] drbd: Output signed / unsigned netlink fields correctly Philipp Reisner
2011-10-10 11:55 ` [PATCH 09/13] drbd: Remove unused GENLA_F_MAY_IGNORE flag Philipp Reisner
2011-10-10 11:55 ` [PATCH 10/13] drbd: Make drbd's use of netlink attribute flags less confusing Philipp Reisner
2011-10-10 11:55 ` [PATCH 11/13] drbd: drbd_nla_check_mandatory(): Need to remove the DRBD_GENLA_F_MANDATORY flag first Philipp Reisner
2011-10-10 11:55 ` [PATCH 12/13] drbd: drbd_adm_prepare(): Pass through error codes Philipp Reisner
2011-10-10 11:55 ` [PATCH 13/13] drbd: Don't use empty nested netlink attributes Philipp Reisner
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