From: Cindy Lu <lulu@redhat.com>
To: lulu@redhat.com, jasowang@redhat.com, mst@redhat.com,
linux-kernel@vger.kernel.org,
virtualization@lists.linux-foundation.org
Subject: [PATCH v5 1/5] vduse: Add new ioctl VDUSE_DEV_GET_CONFIG
Date: Fri, 12 Apr 2024 21:28:21 +0800 [thread overview]
Message-ID: <20240412133017.483407-2-lulu@redhat.com> (raw)
In-Reply-To: <20240412133017.483407-1-lulu@redhat.com>
The ioctl VDUSE_DEV_GET_CONFIG is used by the Userspace App
to get the device configuration space.
Signed-off-by: Cindy Lu <lulu@redhat.com>
---
drivers/vdpa/vdpa_user/vduse_dev.c | 21 +++++++++++++++++++++
include/uapi/linux/vduse.h | 3 +++
2 files changed, 24 insertions(+)
diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
index 1c1d71d69026..ab246da27616 100644
--- a/drivers/vdpa/vdpa_user/vduse_dev.c
+++ b/drivers/vdpa/vdpa_user/vduse_dev.c
@@ -1368,6 +1368,27 @@ static long vduse_dev_ioctl(struct file *file, unsigned int cmd,
ret = 0;
break;
}
+ case VDUSE_DEV_GET_CONFIG: {
+ struct vduse_config_data config;
+ unsigned long size = offsetof(struct vduse_config_data, buffer);
+
+ ret = -EFAULT;
+ if (copy_from_user(&config, argp, size))
+ break;
+
+ ret = -EINVAL;
+ if (config.offset > dev->config_size || config.length == 0 ||
+ config.length > dev->config_size - config.offset)
+ break;
+
+ if (copy_to_user(argp + size, dev->config + config.offset,
+ config.length)) {
+ ret = -EFAULT;
+ break;
+ }
+ ret = 0;
+ break;
+ }
default:
ret = -ENOIOCTLCMD;
break;
diff --git a/include/uapi/linux/vduse.h b/include/uapi/linux/vduse.h
index 11bd48c72c6c..125d7529d91b 100644
--- a/include/uapi/linux/vduse.h
+++ b/include/uapi/linux/vduse.h
@@ -350,4 +350,7 @@ struct vduse_dev_response {
};
};
+/* get device configuration space */
+#define VDUSE_DEV_GET_CONFIG _IOR(VDUSE_BASE, 0x1b, struct vduse_config_data)
+
#endif /* _UAPI_VDUSE_H_ */
--
2.43.0
next prev parent reply other threads:[~2024-04-12 13:30 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-12 13:28 [PATCH v5 0/5] vduse: Add support for reconnection Cindy Lu
2024-04-12 13:28 ` Cindy Lu [this message]
2024-04-12 13:28 ` [PATCH v5 2/5] vduse: Add new ioctl VDUSE_DEV_GET_STATUS Cindy Lu
2024-04-12 13:28 ` [PATCH v5 3/5] vduse: Add function to get/free the pages for reconnection Cindy Lu
2024-04-17 9:29 ` Michael S. Tsirkin
2024-04-18 0:57 ` Jason Wang
2024-04-22 20:05 ` Michael S. Tsirkin
2024-04-23 3:09 ` Jason Wang
2024-04-23 8:42 ` Michael S. Tsirkin
2024-04-24 0:44 ` Jason Wang
2024-04-24 3:14 ` Cindy Lu
2024-04-24 3:51 ` Jason Wang
2024-04-24 9:51 ` Michael S. Tsirkin
2024-04-25 1:35 ` Jason Wang
2024-04-25 10:26 ` Michael S. Tsirkin
2024-04-12 13:28 ` [PATCH v5 4/5] vduse: Add file operation for mmap Cindy Lu
2024-04-12 13:28 ` [PATCH v5 5/5] Documentation: Add reconnect process for VDUSE Cindy Lu
2024-04-16 3:46 ` Jason Wang
2024-04-17 8:46 ` Cindy Lu
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