Linux-Block Archive on lore.kernel.org
 help / color / Atom feed
From: Satya Tangirala <satyat@google.com>
To: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
	dm-devel@redhat.com
Cc: Jens Axboe <axboe@kernel.dk>, Alasdair Kergon <agk@redhat.com>,
	Mike Snitzer <snitzer@redhat.com>,
	Eric Biggers <ebiggers@google.com>,
	Satya Tangirala <satyat@google.com>
Subject: [PATCH v2 2/4] block: add private field to struct keyslot_manager
Date: Thu, 15 Oct 2020 21:46:30 +0000
Message-ID: <20201015214632.41951-3-satyat@google.com> (raw)
In-Reply-To: <20201015214632.41951-1-satyat@google.com>

Add a (void *) pointer to struct keyslot_manager that the owner of the
struct can use for any purpose it wants.

Right now, the struct keyslot_manager is expected to be embedded directly
into other structs (and the owner of the keyslot_manager would use
container_of() to access any other data the owner needs). However, this
might take up more space than is acceptable, and it would be better to be
able to add only a pointer to a struct keyslot_manager into other structs
rather than embed the entire struct directly. But container_of() can't be
used when only the pointer to the keyslot_manager is embded. The primary
motivation of this patch is to get around that issue.

Signed-off-by: Satya Tangirala <satyat@google.com>
---
 include/linux/keyslot-manager.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/keyslot-manager.h b/include/linux/keyslot-manager.h
index 323e15dd6fa7..37f1022b256f 100644
--- a/include/linux/keyslot-manager.h
+++ b/include/linux/keyslot-manager.h
@@ -59,6 +59,9 @@ struct blk_keyslot_manager {
 	/* Device for runtime power management (NULL if none) */
 	struct device *dev;
 
+	/* Private data for owner */
+	void *priv;
+
 	/* Here onwards are *private* fields for internal keyslot manager use */
 
 	unsigned int num_slots;
-- 
2.29.0.rc1.297.gfa9743e501-goog


  parent reply index

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-15 21:46 [PATCH v2 0/4] add support for inline encryption to device mapper Satya Tangirala
2020-10-15 21:46 ` [PATCH v2 1/4] block: keyslot-manager: Introduce passthrough keyslot manager Satya Tangirala
2020-10-16  7:20   ` Christoph Hellwig
2020-10-21  4:44     ` Eric Biggers
2020-10-21  5:27       ` Satya Tangirala
2020-10-27 20:04   ` Eric Biggers
2020-10-15 21:46 ` Satya Tangirala [this message]
2020-10-16  7:19   ` [PATCH v2 2/4] block: add private field to struct keyslot_manager Christoph Hellwig
2020-10-16  8:39     ` Satya Tangirala
2020-10-15 21:46 ` [PATCH v2 3/4] dm: add support for passing through inline crypto support Satya Tangirala
2020-10-25 21:02   ` kernel test robot
2020-10-25 21:02   ` [PATCH] dm: fix err_cast.cocci warnings kernel test robot
2020-10-27 21:31   ` [PATCH v2 3/4] dm: add support for passing through inline crypto support Eric Biggers
2020-10-27 23:58     ` Satya Tangirala
2020-10-28  0:17       ` Eric Biggers
2020-10-29  4:44         ` Satya Tangirala
2020-10-15 21:46 ` [PATCH v2 4/4] dm: enable may_passthrough_inline_crypto on some targets Satya Tangirala
2020-10-27 21:10   ` Eric Biggers

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20201015214632.41951-3-satyat@google.com \
    --to=satyat@google.com \
    --cc=agk@redhat.com \
    --cc=axboe@kernel.dk \
    --cc=dm-devel@redhat.com \
    --cc=ebiggers@google.com \
    --cc=linux-block@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=snitzer@redhat.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-Block Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-block/0 linux-block/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-block linux-block/ https://lore.kernel.org/linux-block \
		linux-block@vger.kernel.org
	public-inbox-index linux-block

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-block


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git