netdev - Re: [PATCH v2 3/4] vdpa: Support for configuring max VQ pairs for a device

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: <2eaa5546-a1d9-76ca-e1d5-410399e27d3a@redhat.com>
Date:   Mon, 21 Feb 2022 11:58:32 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Eli Cohen <elic@...dia.com>, stephen@...workplumber.org,
        netdev@...r.kernel.org
Cc:     lulu@...hat.com, si-wei.liu@...cle.com
Subject: Re: [PATCH v2 3/4] vdpa: Support for configuring max VQ pairs for a
 device


在 2022/2/17 下午8:30, Eli Cohen 写道:
> Use VDPA_ATTR_DEV_MGMTDEV_MAX_VQS to specify max number of virtqueue
> pairs to configure for a vdpa device when adding a device.
>
> Examples:
> 1. Create a device with 3 virtqueue pairs:
> $ vdpa dev add name vdpa-a mgmtdev auxiliary/mlx5_core.sf.1 max_vqp 3
>
> 2. Read the configuration of a vdpa device
> $ vdpa dev config show vdpa-a
>    vdpa-a: mac 00:00:00:00:88:88 link up link_announce false max_vq_pairs 3 \
>            mtu 1500
>    negotiated_features CSUM GUEST_CSUM MTU MAC HOST_TSO4 HOST_TSO6 STATUS \
>                        CTRL_VQ MQ CTRL_MAC_ADDR VERSION_1 ACCESS_PLATFORM
>
> Reviewed-by: Si-Wei Liu <si-wei.liu@...cle.com>
> Signed-off-by: Eli Cohen <elic@...dia.com>


Acked-by: Jason Wang <jasowang@...hat.com>


> ---
>   vdpa/include/uapi/linux/vdpa.h |  1 +
>   vdpa/vdpa.c                    | 27 +++++++++++++++++++++++++--
>   2 files changed, 26 insertions(+), 2 deletions(-)
>
> diff --git a/vdpa/include/uapi/linux/vdpa.h b/vdpa/include/uapi/linux/vdpa.h
> index 748c350450b2..a3ebf4d4d9b8 100644
> --- a/vdpa/include/uapi/linux/vdpa.h
> +++ b/vdpa/include/uapi/linux/vdpa.h
> @@ -41,6 +41,7 @@ enum vdpa_attr {
>   	VDPA_ATTR_DEV_NET_CFG_MTU,		/* u16 */
>   
>   	VDPA_ATTR_DEV_NEGOTIATED_FEATURES,	/* u64 */
> +	VDPA_ATTR_DEV_MGMTDEV_MAX_VQS,          /* u32 */
>   
>   	/* new attributes must be added above here */
>   	VDPA_ATTR_MAX,
> diff --git a/vdpa/vdpa.c b/vdpa/vdpa.c
> index f60e647b8cf8..78736b1422b6 100644
> --- a/vdpa/vdpa.c
> +++ b/vdpa/vdpa.c
> @@ -25,6 +25,7 @@
>   #define VDPA_OPT_VDEV_HANDLE		BIT(3)
>   #define VDPA_OPT_VDEV_MAC		BIT(4)
>   #define VDPA_OPT_VDEV_MTU		BIT(5)
> +#define VDPA_OPT_MAX_VQP		BIT(6)
>   
>   struct vdpa_opts {
>   	uint64_t present; /* flags of present items */
> @@ -34,6 +35,7 @@ struct vdpa_opts {
>   	unsigned int device_id;
>   	char mac[ETH_ALEN];
>   	uint16_t mtu;
> +	uint16_t max_vqp;
>   };
>   
>   struct vdpa {
> @@ -81,6 +83,7 @@ static const enum mnl_attr_data_type vdpa_policy[VDPA_ATTR_MAX + 1] = {
>   	[VDPA_ATTR_DEV_MAX_VQS] = MNL_TYPE_U32,
>   	[VDPA_ATTR_DEV_MAX_VQ_SIZE] = MNL_TYPE_U16,
>   	[VDPA_ATTR_DEV_NEGOTIATED_FEATURES] = MNL_TYPE_U64,
> +	[VDPA_ATTR_DEV_MGMTDEV_MAX_VQS] = MNL_TYPE_U32,
>   };
>   
>   static int attr_cb(const struct nlattr *attr, void *data)
> @@ -222,6 +225,8 @@ static void vdpa_opts_put(struct nlmsghdr *nlh, struct vdpa *vdpa)
>   			     sizeof(opts->mac), opts->mac);
>   	if (opts->present & VDPA_OPT_VDEV_MTU)
>   		mnl_attr_put_u16(nlh, VDPA_ATTR_DEV_NET_CFG_MTU, opts->mtu);
> +	if (opts->present & VDPA_OPT_MAX_VQP)
> +		mnl_attr_put_u16(nlh, VDPA_ATTR_DEV_NET_CFG_MAX_VQP, opts->max_vqp);
>   }
>   
>   static int vdpa_argv_parse(struct vdpa *vdpa, int argc, char **argv,
> @@ -290,6 +295,14 @@ static int vdpa_argv_parse(struct vdpa *vdpa, int argc, char **argv,
>   
>   			NEXT_ARG_FWD();
>   			o_found |= VDPA_OPT_VDEV_MTU;
> +		} else if ((matches(*argv, "max_vqp")  == 0) && (o_optional & VDPA_OPT_MAX_VQP)) {
> +			NEXT_ARG_FWD();
> +			err = vdpa_argv_u16(vdpa, argc, argv, &opts->max_vqp);
> +			if (err)
> +				return err;
> +
> +			NEXT_ARG_FWD();
> +			o_found |= VDPA_OPT_MAX_VQP;
>   		} else {
>   			fprintf(stderr, "Unknown option \"%s\"\n", *argv);
>   			return -EINVAL;
> @@ -500,6 +513,15 @@ static void pr_out_mgmtdev_show(struct vdpa *vdpa, const struct nlmsghdr *nlh,
>   		pr_out_array_end(vdpa);
>   	}
>   
> +	if (tb[VDPA_ATTR_DEV_MGMTDEV_MAX_VQS]) {
> +		uint16_t num_vqs;
> +
> +		if (!vdpa->json_output)
> +			printf("\n");
> +		num_vqs = mnl_attr_get_u16(tb[VDPA_ATTR_DEV_MGMTDEV_MAX_VQS]);
> +		print_uint(PRINT_ANY, "max_supported_vqs", "  max_supported_vqs %d", num_vqs);
> +	}
> +
>   	pr_out_handle_end(vdpa);
>   }
>   
> @@ -559,7 +581,7 @@ static int cmd_mgmtdev(struct vdpa *vdpa, int argc, char **argv)
>   static void cmd_dev_help(void)
>   {
>   	fprintf(stderr, "Usage: vdpa dev show [ DEV ]\n");
> -	fprintf(stderr, "       vdpa dev add name NAME mgmtdev MANAGEMENTDEV [ mac MACADDR ] [ mtu MTU ]\n");
> +	fprintf(stderr, "       vdpa dev add name NAME mgmtdev MANAGEMENTDEV [ mac MACADDR ] [ mtu MTU ] [max_vqp MAX_VQ_PAIRS]\n");
>   	fprintf(stderr, "       vdpa dev del DEV\n");
>   	fprintf(stderr, "Usage: vdpa dev config COMMAND [ OPTIONS ]\n");
>   }
> @@ -649,7 +671,8 @@ static int cmd_dev_add(struct vdpa *vdpa, int argc, char **argv)
>   					  NLM_F_REQUEST | NLM_F_ACK);
>   	err = vdpa_argv_parse_put(nlh, vdpa, argc, argv,
>   				  VDPA_OPT_VDEV_MGMTDEV_HANDLE | VDPA_OPT_VDEV_NAME,
> -				  VDPA_OPT_VDEV_MAC | VDPA_OPT_VDEV_MTU);
> +				  VDPA_OPT_VDEV_MAC | VDPA_OPT_VDEV_MTU |
> +				  VDPA_OPT_MAX_VQP);
>   	if (err)
>   		return err;
>