From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-0016f401.pphosted.com (mx0a-0016f401.pphosted.com [67.231.148.174]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 09737409627; Fri, 5 Jun 2026 06:33:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=67.231.148.174 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780641209; cv=none; b=hHrtX0tYKMaZmt3ShnqCZ0YCa/vavuqkL/Z8dvsL7zxE/wvzQEuxIBbUydchLq75U7wLCXgW2Ow1p7XPQc5uWUcIp+hy/XXCFA3kVxwUv6oYhQJb5kzDOEtRqByy4RzNwGEmp2IBqXeU4jWfmkmmOrkjIBUHpNWe8YxxoaxyvHA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780641209; c=relaxed/simple; bh=GZdS2QUjakgYotPC3ba+HveGsz2JyY7CGy5ir1LoI/Y=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=n4Bap+mr99ef1JG1QASxnltaeVzF1rgXr/P7C96LwrlJYzIlrA6o29fZl8LTAntJhoSRwpzXw6O9pXjULGYh5s1j8f+J1MysVPWnWUL1ukM4yQ+mKc7QP2xHDqY/NxY6e1zVrH57oREoFVzofg29NqnK7jjRDMs4lPrO/lyttIo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=marvell.com; spf=pass smtp.mailfrom=marvell.com; dkim=pass (2048-bit key) header.d=marvell.com header.i=@marvell.com header.b=GjyfbjFh; arc=none smtp.client-ip=67.231.148.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=marvell.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=marvell.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=marvell.com header.i=@marvell.com header.b="GjyfbjFh" Received: from pps.filterd (m0045849.ppops.net [127.0.0.1]) by mx0a-0016f401.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 654LPXva3891046; Thu, 4 Jun 2026 23:33:17 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=marvell.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=pfpt0220; bh=0 UMGw1wARK2aeNfvc9AWyb50o++H2+0dJcA2ALBV1ws=; b=GjyfbjFhtcIypwZAM m7tEeK+D4JFWFtF/8/S7oFUHDZ8hoswPFcwXm2IG/Cy7jtHvl9u7YRrd36Nirkur SHJ2XW3hfY6KI/Y2GVOqhQEZNSZrohVKUyV7wtfH0qPUMf5J7DpRG2OE6TI1YacV BWVzQnFGdZoMrkMSYAxJ6caoUuvyc8GQt2OMwhQtJt6PWMQXYTAEIsMhwcSF8X5Z hbkdMByI6U2D4rcG7BhJSieIz8Y9iLSgBfNzbWPDnf7ZvrE14VoaOBEfzjtc572c VAHJYq9mVIOKX6n0g2BEt0cL95jsOX5+0CauqFrSFgtANIYPEoDrAgDyjxINYFeV gRj8g== Received: from dc5-exch05.marvell.com ([199.233.59.128]) by mx0a-0016f401.pphosted.com (PPS) with ESMTPS id 4ekh8x9b5b-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 04 Jun 2026 23:33:17 -0700 (PDT) Received: from DC5-EXCH05.marvell.com (10.69.176.209) by DC5-EXCH05.marvell.com (10.69.176.209) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.25; Thu, 4 Jun 2026 23:33:16 -0700 Received: from maili.marvell.com (10.69.176.80) by DC5-EXCH05.marvell.com (10.69.176.209) with Microsoft SMTP Server id 15.2.1544.25 via Frontend Transport; Thu, 4 Jun 2026 23:33:16 -0700 Received: from rkannoth-OptiPlex-7090.. (unknown [10.28.36.165]) by maili.marvell.com (Postfix) with ESMTP id 422D23F7074; Thu, 4 Jun 2026 23:33:11 -0700 (PDT) From: Ratheesh Kannoth To: , CC: , , , , , , , , , "Saeed Mahameed" , Ratheesh Kannoth Subject: [PATCH v19 net-next 4/9] devlink: Implement devlink param multi attribute nested data values Date: Fri, 5 Jun 2026 12:02:40 +0530 Message-ID: <20260605063245.3553861-5-rkannoth@marvell.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260605063245.3553861-1-rkannoth@marvell.com> References: <20260605063245.3553861-1-rkannoth@marvell.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Proofpoint-ORIG-GUID: jAUTPjAzjDQqK9dSTlFzER1CTeOClhlY X-Authority-Analysis: v=2.4 cv=DqNmPm/+ c=1 sm=1 tr=0 ts=6a226dad cx=c_pps a=rEv8fa4AjpPjGxpoe8rlIQ==:117 a=rEv8fa4AjpPjGxpoe8rlIQ==:17 a=FelO9ux0wxsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=l0iWHRpgs5sLHlkKQ1IR:22 a=EAYMVhzMl8SCOHhVQcBL:22 a=Ikd4Dj_1AAAA:8 a=M5GUcnROAAAA:8 a=poRX95JG0-uQvCm-gVcA:9 a=OBjm3rFKGHvpk9ecZwUJ:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjA1MDA2MSBTYWx0ZWRfXxowGPRK0p2gk VXfATM2qoLT/sUUnc5vX9Xs9FfFWtyvuyJG6So7JqpqyQ0M9s+DC+eW9wCft4yihNrdOJf8/kIX Tp8jtjprbwcbdwneooytk6h+PyXaIedtBKg0doZk72WaBFL4iM7I9ai/ywTwzSm/raSg2udPScY Vp9/aYRldwpGt0oNGlG5Wm9j4fw2GEmXGKMIsqFlMq+TTD/WAE0PfSGe8ZDp5YTlIZLeDWXK+Qr WShUnle5sLoCFx7Y1+NlAhrVS8O+iGQjchJk9eB20yVeCk7ESBUEyH7l4gU0o39I9TyTFrzI35t Nf2W2W7DN2JE4Ao7RpVnrg1slVrc8ECS5X5woAJm+3Rsr98X+VHQW/mE5RWglUhdTvxXEa4qRKu 47cyPWvrpfY3zNpOM0fo3a5Cg0tAOseskEe2UJGCmFS5YZtoSFiNEfjakqgDU6p/dkWN/l55O5R 0CDJGXqcaKAK1W3Fdlg== X-Proofpoint-GUID: jAUTPjAzjDQqK9dSTlFzER1CTeOClhlY X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-05_01,2026-05-28_03,2025-10-01_01 From: Saeed Mahameed Devlink param value attribute is not defined since devlink is handling the value validating and parsing internally, this allows us to implement multi attribute values without breaking any policies. Devlink param multi-attribute values are considered to be dynamically sized arrays of u64 values, by introducing a new devlink param type DEVLINK_PARAM_TYPE_U64_ARRAY, driver and user space can set a variable count of u64 values into the DEVLINK_ATTR_PARAM_VALUE_DATA attribute. Implement get/set parsing and add to the internal value structure passed to drivers. This is useful for devices that need to configure a list of values for a specific configuration. example: $ devlink dev param show pci/... name multi-value-param name multi-value-param type driver-specific values: cmode permanent value: 0,1,2,3,4,5,6,7 $ devlink dev param set pci/... name multi-value-param \ value 4,5,6,7,0,1,2,3 cmode permanent Signed-off-by: Saeed Mahameed Signed-off-by: Ratheesh Kannoth --- Documentation/netlink/specs/devlink.yaml | 4 +++ include/net/devlink.h | 8 ++++++ include/uapi/linux/devlink.h | 1 + net/devlink/netlink_gen.c | 2 ++ net/devlink/param.c | 33 +++++++++++++++++++++++- 5 files changed, 47 insertions(+), 1 deletion(-) diff --git a/Documentation/netlink/specs/devlink.yaml b/Documentation/netlink/specs/devlink.yaml index 247b147d689f..52ad1e7805d1 100644 --- a/Documentation/netlink/specs/devlink.yaml +++ b/Documentation/netlink/specs/devlink.yaml @@ -234,6 +234,10 @@ definitions: value: 10 - name: binary + - + name: u64-array + value: 129 + - name: rate-tc-index-max type: const diff --git a/include/net/devlink.h b/include/net/devlink.h index 5f4083dc4345..dd546dbd57cf 100644 --- a/include/net/devlink.h +++ b/include/net/devlink.h @@ -433,6 +433,13 @@ enum devlink_param_type { DEVLINK_PARAM_TYPE_U64 = DEVLINK_VAR_ATTR_TYPE_U64, DEVLINK_PARAM_TYPE_STRING = DEVLINK_VAR_ATTR_TYPE_STRING, DEVLINK_PARAM_TYPE_BOOL = DEVLINK_VAR_ATTR_TYPE_FLAG, + DEVLINK_PARAM_TYPE_U64_ARRAY = DEVLINK_VAR_ATTR_TYPE_U64_ARRAY, +}; + +#define __DEVLINK_PARAM_MAX_ARRAY_SIZE 32 +struct devlink_param_u64_array { + u64 size; + u64 val[__DEVLINK_PARAM_MAX_ARRAY_SIZE]; }; union devlink_param_value { @@ -442,6 +449,7 @@ union devlink_param_value { u64 vu64; char vstr[__DEVLINK_PARAM_MAX_STRING_VALUE]; bool vbool; + struct devlink_param_u64_array u64arr; }; struct devlink_param_gset_ctx { diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h index 0b165eac7619..ca713bcc47b9 100644 --- a/include/uapi/linux/devlink.h +++ b/include/uapi/linux/devlink.h @@ -406,6 +406,7 @@ enum devlink_var_attr_type { DEVLINK_VAR_ATTR_TYPE_BINARY, __DEVLINK_VAR_ATTR_TYPE_CUSTOM_BASE = 0x80, /* Any possible custom types, unrelated to NLA_* values go below */ + DEVLINK_VAR_ATTR_TYPE_U64_ARRAY, }; enum devlink_attr { diff --git a/net/devlink/netlink_gen.c b/net/devlink/netlink_gen.c index 81899786fd98..f52b0c2b19ed 100644 --- a/net/devlink/netlink_gen.c +++ b/net/devlink/netlink_gen.c @@ -37,6 +37,8 @@ devlink_attr_param_type_validate(const struct nlattr *attr, case DEVLINK_VAR_ATTR_TYPE_NUL_STRING: fallthrough; case DEVLINK_VAR_ATTR_TYPE_BINARY: + fallthrough; + case DEVLINK_VAR_ATTR_TYPE_U64_ARRAY: return 0; } NL_SET_ERR_MSG_ATTR(extack, attr, "invalid enum value"); diff --git a/net/devlink/param.c b/net/devlink/param.c index bd3881349c60..3e9d2e5750c2 100644 --- a/net/devlink/param.c +++ b/net/devlink/param.c @@ -252,6 +252,15 @@ devlink_nl_param_value_put(struct sk_buff *msg, enum devlink_param_type type, return -EMSGSIZE; } break; + case DEVLINK_PARAM_TYPE_U64_ARRAY: + if (val->u64arr.size > __DEVLINK_PARAM_MAX_ARRAY_SIZE) + return -EMSGSIZE; + + for (int i = 0; i < val->u64arr.size; i++) { + if (nla_put_uint(msg, nla_type, val->u64arr.val[i])) + return -EMSGSIZE; + } + break; } return 0; } @@ -537,7 +546,7 @@ devlink_param_value_get_from_info(const struct devlink_param *param, union devlink_param_value *value) { struct nlattr *param_data; - int len; + int len, cnt, rem; param_data = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]; @@ -577,6 +586,28 @@ devlink_param_value_get_from_info(const struct devlink_param *param, return -EINVAL; value->vbool = nla_get_flag(param_data); break; + + case DEVLINK_PARAM_TYPE_U64_ARRAY: + cnt = 0; + nla_for_each_attr_type(param_data, + DEVLINK_ATTR_PARAM_VALUE_DATA, + genlmsg_data(info->genlhdr), + genlmsg_len(info->genlhdr), rem) { + if (cnt >= __DEVLINK_PARAM_MAX_ARRAY_SIZE) + return -EMSGSIZE; + + if ((nla_len(param_data) != sizeof(u64)) && + (nla_len(param_data) != sizeof(u32))) { + NL_SET_BAD_ATTR(info->extack, param_data); + return -EINVAL; + } + + value->u64arr.val[cnt] = nla_get_uint(param_data); + cnt++; + } + + value->u64arr.size = cnt; + break; } return 0; } -- 2.43.0