All of lore.kernel.org
 help / color / mirror / Atom feed
From: Stefano Garzarella <sgarzare@redhat.com>
To: virtualization@lists.linux-foundation.org
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	"Michael S. Tsirkin" <mst@redhat.com>,
	Jason Wang <jasowang@redhat.com>
Subject: [RFC PATCH 04/10] vdpa: remove param checks in the get/set_config callbacks
Date: Tue, 16 Feb 2021 10:44:48 +0100	[thread overview]
Message-ID: <20210216094454.82106-5-sgarzare@redhat.com> (raw)
In-Reply-To: <20210216094454.82106-1-sgarzare@redhat.com>

vdpa_get_config() and vdpa_set_config() now check parameters before
calling callbacks, so we can remove these redundant checks.

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
---
 drivers/vdpa/mlx5/net/mlx5_vnet.c | 3 +--
 drivers/vdpa/vdpa_sim/vdpa_sim.c  | 6 ------
 2 files changed, 1 insertion(+), 8 deletions(-)

diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index 78043ee567b6..ab63dc9b8432 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -1825,8 +1825,7 @@ static void mlx5_vdpa_get_config(struct vdpa_device *vdev, unsigned int offset,
 	struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
 	struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
 
-	if (offset + len <= sizeof(struct virtio_net_config))
-		memcpy(buf, (u8 *)&ndev->config + offset, len);
+	memcpy(buf, (u8 *)&ndev->config + offset, len);
 }
 
 static void mlx5_vdpa_set_config(struct vdpa_device *vdev, unsigned int offset, const void *buf,
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index 779ae6c144d7..392180c6f2cf 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -451,9 +451,6 @@ static void vdpasim_get_config(struct vdpa_device *vdpa, unsigned int offset,
 {
 	struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 
-	if (offset + len > vdpasim->dev_attr.config_size)
-		return;
-
 	if (vdpasim->dev_attr.get_config)
 		vdpasim->dev_attr.get_config(vdpasim, vdpasim->config);
 
@@ -465,9 +462,6 @@ static void vdpasim_set_config(struct vdpa_device *vdpa, unsigned int offset,
 {
 	struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 
-	if (offset + len > vdpasim->dev_attr.config_size)
-		return;
-
 	memcpy(vdpasim->config + offset, buf, len);
 
 	if (vdpasim->dev_attr.set_config)
-- 
2.29.2


WARNING: multiple messages have this Message-ID (diff)
From: Stefano Garzarella <sgarzare@redhat.com>
To: virtualization@lists.linux-foundation.org
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
	"Michael S. Tsirkin" <mst@redhat.com>
Subject: [RFC PATCH 04/10] vdpa: remove param checks in the get/set_config callbacks
Date: Tue, 16 Feb 2021 10:44:48 +0100	[thread overview]
Message-ID: <20210216094454.82106-5-sgarzare@redhat.com> (raw)
In-Reply-To: <20210216094454.82106-1-sgarzare@redhat.com>

vdpa_get_config() and vdpa_set_config() now check parameters before
calling callbacks, so we can remove these redundant checks.

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
---
 drivers/vdpa/mlx5/net/mlx5_vnet.c | 3 +--
 drivers/vdpa/vdpa_sim/vdpa_sim.c  | 6 ------
 2 files changed, 1 insertion(+), 8 deletions(-)

diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index 78043ee567b6..ab63dc9b8432 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -1825,8 +1825,7 @@ static void mlx5_vdpa_get_config(struct vdpa_device *vdev, unsigned int offset,
 	struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
 	struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
 
-	if (offset + len <= sizeof(struct virtio_net_config))
-		memcpy(buf, (u8 *)&ndev->config + offset, len);
+	memcpy(buf, (u8 *)&ndev->config + offset, len);
 }
 
 static void mlx5_vdpa_set_config(struct vdpa_device *vdev, unsigned int offset, const void *buf,
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index 779ae6c144d7..392180c6f2cf 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -451,9 +451,6 @@ static void vdpasim_get_config(struct vdpa_device *vdpa, unsigned int offset,
 {
 	struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 
-	if (offset + len > vdpasim->dev_attr.config_size)
-		return;
-
 	if (vdpasim->dev_attr.get_config)
 		vdpasim->dev_attr.get_config(vdpasim, vdpasim->config);
 
@@ -465,9 +462,6 @@ static void vdpasim_set_config(struct vdpa_device *vdpa, unsigned int offset,
 {
 	struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 
-	if (offset + len > vdpasim->dev_attr.config_size)
-		return;
-
 	memcpy(vdpasim->config + offset, buf, len);
 
 	if (vdpasim->dev_attr.set_config)
-- 
2.29.2

_______________________________________________
Virtualization mailing list
Virtualization@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/virtualization

  parent reply	other threads:[~2021-02-16  9:48 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-16  9:44 [RFC PATCH 00/10] vdpa: get/set_config() rework Stefano Garzarella
2021-02-16  9:44 ` Stefano Garzarella
2021-02-16  9:44 ` [RFC PATCH 01/10] vdpa: add get_config_size callback in vdpa_config_ops Stefano Garzarella
2021-02-16  9:44   ` Stefano Garzarella
2021-03-02  4:14   ` Jason Wang
2021-03-02  4:14     ` Jason Wang
2021-03-02 14:15     ` Stefano Garzarella
2021-03-02 14:15       ` Stefano Garzarella
2021-03-04  8:34       ` Jason Wang
2021-03-04  8:34         ` Jason Wang
2021-03-05  8:38         ` Stefano Garzarella
2021-03-05  8:38           ` Stefano Garzarella
2021-02-16  9:44 ` [RFC PATCH 02/10] vdpa: check vdpa_get_config() parameters and return bytes read Stefano Garzarella
2021-02-16  9:44   ` Stefano Garzarella
2021-02-16  9:44 ` [RFC PATCH 03/10] vdpa: add vdpa_set_config() helper Stefano Garzarella
2021-02-16  9:44   ` Stefano Garzarella
2021-02-16  9:44 ` Stefano Garzarella [this message]
2021-02-16  9:44   ` [RFC PATCH 04/10] vdpa: remove param checks in the get/set_config callbacks Stefano Garzarella
2021-02-16  9:44 ` [RFC PATCH 05/10] vdpa: remove WARN_ON() " Stefano Garzarella
2021-02-16  9:44   ` Stefano Garzarella
2021-02-16  9:44 ` [RFC PATCH 06/10] virtio_vdpa: use vdpa_set_config() Stefano Garzarella
2021-02-16  9:44   ` Stefano Garzarella
2021-02-16  9:44 ` [RFC PATCH 07/10] vhost/vdpa: " Stefano Garzarella
2021-02-16  9:44   ` Stefano Garzarella
2021-02-16  9:44 ` [RFC PATCH 08/10] vhost/vdpa: allow user space to pass buffers bigger than config space Stefano Garzarella
2021-02-16  9:44   ` Stefano Garzarella
2021-02-16  9:44 ` [RFC PATCH 09/10] vhost/vdpa: use get_config_size callback in vhost_vdpa_config_validate() Stefano Garzarella
2021-02-16  9:44   ` Stefano Garzarella
2021-02-16  9:44 ` [RFC PATCH 10/10] vhost/vdpa: return configuration bytes read and written to user space Stefano Garzarella
2021-02-16  9:44   ` Stefano Garzarella
2021-03-02  4:05   ` Jason Wang
2021-03-02  4:05     ` Jason Wang
2021-03-02 14:06     ` Stefano Garzarella
2021-03-02 14:06       ` Stefano Garzarella
2021-03-04  8:31       ` Jason Wang
2021-03-04  8:31         ` Jason Wang
2021-03-05  8:37         ` Stefano Garzarella
2021-03-05  8:37           ` Stefano Garzarella
2021-03-08  3:59           ` Jason Wang
2021-03-08  3:59             ` Jason Wang
2021-03-01  8:17 ` [RFC PATCH 00/10] vdpa: get/set_config() rework Stefano Garzarella
2021-03-01  8:17   ` Stefano Garzarella

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=20210216094454.82106-5-sgarzare@redhat.com \
    --to=sgarzare@redhat.com \
    --cc=jasowang@redhat.com \
    --cc=kvm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mst@redhat.com \
    --cc=virtualization@lists.linux-foundation.org \
    /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
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.