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Wed, 28 Feb 2024 12:58:02 +0000 Received: from SJ1PR12MB6075.namprd12.prod.outlook.com ([fe80::aa05:b8a0:7d5:b463]) by SJ1PR12MB6075.namprd12.prod.outlook.com ([fe80::aa05:b8a0:7d5:b463%3]) with mapi id 15.20.7316.032; Wed, 28 Feb 2024 12:58:02 +0000 From: Aurelien Aptel To: linux-nvme@lists.infradead.org, netdev@vger.kernel.org, sagi@grimberg.me, hch@lst.de, kbusch@kernel.org, axboe@fb.com, chaitanyak@nvidia.com, davem@davemloft.net, kuba@kernel.org Cc: Aurelien Aptel , aurelien.aptel@gmail.com, smalin@nvidia.com, malin1024@gmail.com, ogerlitz@nvidia.com, yorayz@nvidia.com, borisp@nvidia.com, galshalom@nvidia.com, mgurtovoy@nvidia.com, edumazet@google.com, pabeni@redhat.com Subject: [PATCH v23 02/20] netlink: add new family to manage ULP_DDP enablement and stats Date: Wed, 28 Feb 2024 12:57:15 +0000 Message-Id: <20240228125733.299384-3-aaptel@nvidia.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240228125733.299384-1-aaptel@nvidia.com> References: <20240228125733.299384-1-aaptel@nvidia.com> X-ClientProxiedBy: FR4P281CA0443.DEUP281.PROD.OUTLOOK.COM (2603:10a6:d10:c6::17) To SJ1PR12MB6075.namprd12.prod.outlook.com (2603:10b6:a03:45e::8) Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PR12MB6075:EE_|SA1PR12MB8841:EE_ X-MS-Office365-Filtering-Correlation-Id: 338824b2-2b37-45eb-faf6-08dc385ce5b2 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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The messages use the genetlink infrastructure and are specified in a YAML file which was used to generate some of the files in this commit: ./tools/net/ynl/ynl-gen-c.py --mode kernel \ --spec ./Documentation/netlink/specs/ulp_ddp.yaml --header \ -o net/core/ulp_ddp_gen_nl.h ./tools/net/ynl/ynl-gen-c.py --mode kernel \ --spec ./Documentation/netlink/specs/ulp_ddp.yaml --source \ -o net/core/ulp_ddp_gen_nl.c ./tools/net/ynl/ynl-gen-c.py --mode uapi \ --spec ./Documentation/netlink/specs/ulp_ddp.yaml --header \ > include/uapi/linux/ulp_ddp.h Signed-off-by: Shai Malin Signed-off-by: Aurelien Aptel --- Documentation/netlink/specs/ulp_ddp.yaml | 172 ++++++++++++ include/net/ulp_ddp.h | 3 +- include/uapi/linux/ulp_ddp.h | 61 ++++ net/core/Makefile | 2 +- net/core/ulp_ddp_gen_nl.c | 75 +++++ net/core/ulp_ddp_gen_nl.h | 30 ++ net/core/ulp_ddp_nl.c | 344 +++++++++++++++++++++++ 7 files changed, 685 insertions(+), 2 deletions(-) create mode 100644 Documentation/netlink/specs/ulp_ddp.yaml create mode 100644 include/uapi/linux/ulp_ddp.h create mode 100644 net/core/ulp_ddp_gen_nl.c create mode 100644 net/core/ulp_ddp_gen_nl.h create mode 100644 net/core/ulp_ddp_nl.c diff --git a/Documentation/netlink/specs/ulp_ddp.yaml b/Documentation/netlink/specs/ulp_ddp.yaml new file mode 100644 index 000000000000..27a0b905ec28 --- /dev/null +++ b/Documentation/netlink/specs/ulp_ddp.yaml @@ -0,0 +1,172 @@ +# SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) +# +# Author: Aurelien Aptel +# +# Copyright (c) 2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved. +# + +name: ulp_ddp + +protocol: genetlink + +doc: Netlink protocol to manage ULP DPP on network devices. + +definitions: + - + type: enum + name: cap + render-max: true + entries: + - nvme-tcp + - nvme-tcp-ddgst-rx + +attribute-sets: + - + name: stats + attributes: + - + name: ifindex + doc: Interface index of the net device. + type: u32 + - + name: rx-nvme-tcp-sk-add + doc: Sockets successfully configured for NVMeTCP offloading. + type: uint + - + name: rx-nvme-tcp-sk-add-fail + doc: Sockets failed to be configured for NVMeTCP offloading. + type: uint + - + name: rx-nvme-tcp-sk-del + doc: Sockets with NVMeTCP offloading configuration removed. + type: uint + - + name: rx-nvme-tcp-setup + doc: NVMe-TCP IOs successfully configured for Rx Direct Data Placement. + type: uint + - + name: rx-nvme-tcp-setup-fail + doc: NVMe-TCP IOs failed to be configured for Rx Direct Data Placement. + type: uint + - + name: rx-nvme-tcp-teardown + doc: NVMe-TCP IOs with Rx Direct Data Placement configuration removed. + type: uint + - + name: rx-nvme-tcp-drop + doc: Packets failed the NVMeTCP offload validation. + type: uint + - + name: rx-nvme-tcp-resync + doc: > + NVMe-TCP resync operations were processed due to Rx TCP packets + re-ordering. + type: uint + - + name: rx-nvme-tcp-packets + doc: TCP packets successfully processed by the NVMeTCP offload. + type: uint + - + name: rx-nvme-tcp-bytes + doc: Bytes were successfully processed by the NVMeTCP offload. + type: uint + - + name: caps + attributes: + - + name: ifindex + doc: Interface index of the net device. + type: u32 + - + name: hw + doc: Bitmask of the capabilities supported by the device. + type: uint + enum: cap + enum-as-flags: true + - + name: active + doc: Bitmask of the capabilities currently enabled on the device. + type: uint + enum: cap + enum-as-flags: true + - + name: wanted + doc: > + New active bit values of the capabilities we want to set on the + device. + type: uint + enum: cap + enum-as-flags: true + - + name: wanted_mask + doc: Bitmask of the meaningful bits in the wanted field. + type: uint + enum: cap + enum-as-flags: true + +operations: + list: + - + name: caps-get + doc: Get ULP DDP capabilities. + attribute-set: caps + do: + request: + attributes: + - ifindex + reply: + attributes: + - ifindex + - hw + - active + pre: ulp_ddp_get_netdev + post: ulp_ddp_put_netdev + - + name: stats-get + doc: Get ULP DDP stats. + attribute-set: stats + do: + request: + attributes: + - ifindex + reply: + attributes: + - ifindex + - rx-nvme-tcp-sk-add + - rx-nvme-tcp-sk-add-fail + - rx-nvme-tcp-sk-del + - rx-nvme-tcp-setup + - rx-nvme-tcp-setup-fail + - rx-nvme-tcp-teardown + - rx-nvme-tcp-drop + - rx-nvme-tcp-resync + - rx-nvme-tcp-packets + - rx-nvme-tcp-bytes + pre: ulp_ddp_get_netdev + post: ulp_ddp_put_netdev + - + name: caps-set + doc: Set ULP DDP capabilities. + attribute-set: caps + do: + request: + attributes: + - ifindex + - wanted + - wanted_mask + reply: + attributes: + - ifindex + - hw + - active + pre: ulp_ddp_get_netdev + post: ulp_ddp_put_netdev + - + name: caps-set-ntf + doc: Notification for change in ULP DDP capabilities. + notify: caps-get + +mcast-groups: + list: + - + name: mgmt diff --git a/include/net/ulp_ddp.h b/include/net/ulp_ddp.h index 5be527332799..ce333e28e089 100644 --- a/include/net/ulp_ddp.h +++ b/include/net/ulp_ddp.h @@ -10,6 +10,7 @@ #include #include #include +#include enum ulp_ddp_type { ULP_DDP_NVME = 1, @@ -128,7 +129,7 @@ struct ulp_ddp_stats { */ }; -#define ULP_DDP_CAP_COUNT 1 +#define ULP_DDP_CAP_COUNT (ULP_DDP_CAP_MAX + 1) struct ulp_ddp_dev_caps { DECLARE_BITMAP(active, ULP_DDP_CAP_COUNT); diff --git a/include/uapi/linux/ulp_ddp.h b/include/uapi/linux/ulp_ddp.h new file mode 100644 index 000000000000..dbf6399d3aef --- /dev/null +++ b/include/uapi/linux/ulp_ddp.h @@ -0,0 +1,61 @@ +/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */ +/* Do not edit directly, auto-generated from: */ +/* Documentation/netlink/specs/ulp_ddp.yaml */ +/* YNL-GEN uapi header */ + +#ifndef _UAPI_LINUX_ULP_DDP_H +#define _UAPI_LINUX_ULP_DDP_H + +#define ULP_DDP_FAMILY_NAME "ulp_ddp" +#define ULP_DDP_FAMILY_VERSION 1 + +enum ulp_ddp_cap { + ULP_DDP_CAP_NVME_TCP, + ULP_DDP_CAP_NVME_TCP_DDGST_RX, + + /* private: */ + __ULP_DDP_CAP_MAX, + ULP_DDP_CAP_MAX = (__ULP_DDP_CAP_MAX - 1) +}; + +enum { + ULP_DDP_A_STATS_IFINDEX = 1, + ULP_DDP_A_STATS_RX_NVME_TCP_SK_ADD, + ULP_DDP_A_STATS_RX_NVME_TCP_SK_ADD_FAIL, + ULP_DDP_A_STATS_RX_NVME_TCP_SK_DEL, + ULP_DDP_A_STATS_RX_NVME_TCP_SETUP, + ULP_DDP_A_STATS_RX_NVME_TCP_SETUP_FAIL, + ULP_DDP_A_STATS_RX_NVME_TCP_TEARDOWN, + ULP_DDP_A_STATS_RX_NVME_TCP_DROP, + ULP_DDP_A_STATS_RX_NVME_TCP_RESYNC, + ULP_DDP_A_STATS_RX_NVME_TCP_PACKETS, + ULP_DDP_A_STATS_RX_NVME_TCP_BYTES, + + __ULP_DDP_A_STATS_MAX, + ULP_DDP_A_STATS_MAX = (__ULP_DDP_A_STATS_MAX - 1) +}; + +enum { + ULP_DDP_A_CAPS_IFINDEX = 1, + ULP_DDP_A_CAPS_HW, + ULP_DDP_A_CAPS_ACTIVE, + ULP_DDP_A_CAPS_WANTED, + ULP_DDP_A_CAPS_WANTED_MASK, + + __ULP_DDP_A_CAPS_MAX, + ULP_DDP_A_CAPS_MAX = (__ULP_DDP_A_CAPS_MAX - 1) +}; + +enum { + ULP_DDP_CMD_CAPS_GET = 1, + ULP_DDP_CMD_STATS_GET, + ULP_DDP_CMD_CAPS_SET, + ULP_DDP_CMD_CAPS_SET_NTF, + + __ULP_DDP_CMD_MAX, + ULP_DDP_CMD_MAX = (__ULP_DDP_CMD_MAX - 1) +}; + +#define ULP_DDP_MCGRP_MGMT "mgmt" + +#endif /* _UAPI_LINUX_ULP_DDP_H */ diff --git a/net/core/Makefile b/net/core/Makefile index c135195005f5..da381587a161 100644 --- a/net/core/Makefile +++ b/net/core/Makefile @@ -18,7 +18,7 @@ obj-y += dev.o dev_addr_lists.o dst.o netevent.o \ obj-$(CONFIG_NETDEV_ADDR_LIST_TEST) += dev_addr_lists_test.o obj-y += net-sysfs.o -obj-$(CONFIG_ULP_DDP) += ulp_ddp.o +obj-$(CONFIG_ULP_DDP) += ulp_ddp.o ulp_ddp_nl.o ulp_ddp_gen_nl.o obj-$(CONFIG_PAGE_POOL) += page_pool.o page_pool_user.o obj-$(CONFIG_PROC_FS) += net-procfs.o obj-$(CONFIG_NET_PKTGEN) += pktgen.o diff --git a/net/core/ulp_ddp_gen_nl.c b/net/core/ulp_ddp_gen_nl.c new file mode 100644 index 000000000000..5675193ad8ca --- /dev/null +++ b/net/core/ulp_ddp_gen_nl.c @@ -0,0 +1,75 @@ +// SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) +/* Do not edit directly, auto-generated from: */ +/* Documentation/netlink/specs/ulp_ddp.yaml */ +/* YNL-GEN kernel source */ + +#include +#include + +#include "ulp_ddp_gen_nl.h" + +#include + +/* ULP_DDP_CMD_CAPS_GET - do */ +static const struct nla_policy ulp_ddp_caps_get_nl_policy[ULP_DDP_A_CAPS_IFINDEX + 1] = { + [ULP_DDP_A_CAPS_IFINDEX] = { .type = NLA_U32, }, +}; + +/* ULP_DDP_CMD_STATS_GET - do */ +static const struct nla_policy ulp_ddp_stats_get_nl_policy[ULP_DDP_A_STATS_IFINDEX + 1] = { + [ULP_DDP_A_STATS_IFINDEX] = { .type = NLA_U32, }, +}; + +/* ULP_DDP_CMD_CAPS_SET - do */ +static const struct nla_policy ulp_ddp_caps_set_nl_policy[ULP_DDP_A_CAPS_WANTED_MASK + 1] = { + [ULP_DDP_A_CAPS_IFINDEX] = { .type = NLA_U32, }, + [ULP_DDP_A_CAPS_WANTED] = NLA_POLICY_MASK(NLA_UINT, 0x3), + [ULP_DDP_A_CAPS_WANTED_MASK] = NLA_POLICY_MASK(NLA_UINT, 0x3), +}; + +/* Ops table for ulp_ddp */ +static const struct genl_split_ops ulp_ddp_nl_ops[] = { + { + .cmd = ULP_DDP_CMD_CAPS_GET, + .pre_doit = ulp_ddp_get_netdev, + .doit = ulp_ddp_nl_caps_get_doit, + .post_doit = ulp_ddp_put_netdev, + .policy = ulp_ddp_caps_get_nl_policy, + .maxattr = ULP_DDP_A_CAPS_IFINDEX, + .flags = GENL_CMD_CAP_DO, + }, + { + .cmd = ULP_DDP_CMD_STATS_GET, + .pre_doit = ulp_ddp_get_netdev, + .doit = ulp_ddp_nl_stats_get_doit, + .post_doit = ulp_ddp_put_netdev, + .policy = ulp_ddp_stats_get_nl_policy, + .maxattr = ULP_DDP_A_STATS_IFINDEX, + .flags = GENL_CMD_CAP_DO, + }, + { + .cmd = ULP_DDP_CMD_CAPS_SET, + .pre_doit = ulp_ddp_get_netdev, + .doit = ulp_ddp_nl_caps_set_doit, + .post_doit = ulp_ddp_put_netdev, + .policy = ulp_ddp_caps_set_nl_policy, + .maxattr = ULP_DDP_A_CAPS_WANTED_MASK, + .flags = GENL_CMD_CAP_DO, + }, +}; + +static const struct genl_multicast_group ulp_ddp_nl_mcgrps[] = { + [ULP_DDP_NLGRP_MGMT] = { "mgmt", }, +}; + +struct genl_family ulp_ddp_nl_family __ro_after_init = { + .name = ULP_DDP_FAMILY_NAME, + .version = ULP_DDP_FAMILY_VERSION, + .netnsok = true, + .parallel_ops = true, + .module = THIS_MODULE, + .split_ops = ulp_ddp_nl_ops, + .n_split_ops = ARRAY_SIZE(ulp_ddp_nl_ops), + .mcgrps = ulp_ddp_nl_mcgrps, + .n_mcgrps = ARRAY_SIZE(ulp_ddp_nl_mcgrps), +}; diff --git a/net/core/ulp_ddp_gen_nl.h b/net/core/ulp_ddp_gen_nl.h new file mode 100644 index 000000000000..368433cfa867 --- /dev/null +++ b/net/core/ulp_ddp_gen_nl.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */ +/* Do not edit directly, auto-generated from: */ +/* Documentation/netlink/specs/ulp_ddp.yaml */ +/* YNL-GEN kernel header */ + +#ifndef _LINUX_ULP_DDP_GEN_H +#define _LINUX_ULP_DDP_GEN_H + +#include +#include + +#include + +int ulp_ddp_get_netdev(const struct genl_split_ops *ops, struct sk_buff *skb, + struct genl_info *info); +void +ulp_ddp_put_netdev(const struct genl_split_ops *ops, struct sk_buff *skb, + struct genl_info *info); + +int ulp_ddp_nl_caps_get_doit(struct sk_buff *skb, struct genl_info *info); +int ulp_ddp_nl_stats_get_doit(struct sk_buff *skb, struct genl_info *info); +int ulp_ddp_nl_caps_set_doit(struct sk_buff *skb, struct genl_info *info); + +enum { + ULP_DDP_NLGRP_MGMT, +}; + +extern struct genl_family ulp_ddp_nl_family; + +#endif /* _LINUX_ULP_DDP_GEN_H */ diff --git a/net/core/ulp_ddp_nl.c b/net/core/ulp_ddp_nl.c new file mode 100644 index 000000000000..04feefce23c2 --- /dev/null +++ b/net/core/ulp_ddp_nl.c @@ -0,0 +1,344 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ulp_ddp_nl.c + * Author: Aurelien Aptel + * Copyright (c) 2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved. + */ +#include +#include "ulp_ddp_gen_nl.h" + +#define ULP_DDP_STATS_CNT (sizeof(struct ulp_ddp_stats) / sizeof(u64)) + +struct ulp_ddp_reply_context { + struct net_device *dev; + netdevice_tracker tracker; + struct ulp_ddp_dev_caps caps; + struct ulp_ddp_stats stats; +}; + +static size_t ulp_ddp_reply_size(int cmd) +{ + size_t len = 0; + + BUILD_BUG_ON(ULP_DDP_CAP_COUNT > 64); + + /* ifindex */ + len += nla_total_size(sizeof(u32)); + + switch (cmd) { + case ULP_DDP_CMD_CAPS_GET: + case ULP_DDP_CMD_CAPS_SET: + case ULP_DDP_CMD_CAPS_SET_NTF: + /* hw */ + len += nla_total_size_64bit(sizeof(u64)); + + /* active */ + len += nla_total_size_64bit(sizeof(u64)); + break; + case ULP_DDP_CMD_STATS_GET: + /* stats */ + len += nla_total_size_64bit(sizeof(u64)) * ULP_DDP_STATS_CNT; + break; + } + + return len; +} + +/* pre_doit */ +int ulp_ddp_get_netdev(const struct genl_split_ops *ops, + struct sk_buff *skb, struct genl_info *info) +{ + struct ulp_ddp_reply_context *ctx; + u32 ifindex; + + if (GENL_REQ_ATTR_CHECK(info, ULP_DDP_A_CAPS_IFINDEX)) + return -EINVAL; + + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ifindex = nla_get_u32(info->attrs[ULP_DDP_A_CAPS_IFINDEX]); + ctx->dev = netdev_get_by_index(genl_info_net(info), + ifindex, + &ctx->tracker, + GFP_KERNEL); + if (!ctx->dev) { + kfree(ctx); + NL_SET_ERR_MSG_ATTR(info->extack, + info->attrs[ULP_DDP_A_CAPS_IFINDEX], + "Network interface does not exist"); + return -ENODEV; + } + + if (!ctx->dev->netdev_ops->ulp_ddp_ops) { + netdev_put(ctx->dev, &ctx->tracker); + kfree(ctx); + NL_SET_ERR_MSG_ATTR(info->extack, + info->attrs[ULP_DDP_A_CAPS_IFINDEX], + "Network interface does not support ULP DDP"); + return -EOPNOTSUPP; + } + + info->user_ptr[0] = ctx; + return 0; +} + +/* post_doit */ +void ulp_ddp_put_netdev(const struct genl_split_ops *ops, struct sk_buff *skb, + struct genl_info *info) +{ + struct ulp_ddp_reply_context *ctx = info->user_ptr[0]; + + netdev_put(ctx->dev, &ctx->tracker); + kfree(ctx); +} + +static int ulp_ddp_prepare_context(struct ulp_ddp_reply_context *ctx, int cmd) +{ + const struct ulp_ddp_dev_ops *ops = ctx->dev->netdev_ops->ulp_ddp_ops; + + switch (cmd) { + case ULP_DDP_CMD_CAPS_GET: + case ULP_DDP_CMD_CAPS_SET: + case ULP_DDP_CMD_CAPS_SET_NTF: + ops->get_caps(ctx->dev, &ctx->caps); + break; + case ULP_DDP_CMD_STATS_GET: + ops->get_stats(ctx->dev, &ctx->stats); + break; + } + + return 0; +} + +static int ulp_ddp_write_reply(struct sk_buff *rsp, + struct ulp_ddp_reply_context *ctx, + int cmd, + const struct genl_info *info) +{ + void *hdr; + + hdr = genlmsg_iput(rsp, info); + if (!hdr) + return -EMSGSIZE; + + switch (cmd) { + case ULP_DDP_CMD_CAPS_GET: + case ULP_DDP_CMD_CAPS_SET: + case ULP_DDP_CMD_CAPS_SET_NTF: + if (nla_put_u32(rsp, ULP_DDP_A_CAPS_IFINDEX, + ctx->dev->ifindex) || + nla_put_uint(rsp, ULP_DDP_A_CAPS_HW, ctx->caps.hw[0]) || + nla_put_uint(rsp, ULP_DDP_A_CAPS_ACTIVE, + ctx->caps.active[0])) + goto err_cancel_msg; + break; + case ULP_DDP_CMD_STATS_GET: + if (nla_put_u32(rsp, ULP_DDP_A_STATS_IFINDEX, + ctx->dev->ifindex) || + nla_put_uint(rsp, + ULP_DDP_A_STATS_RX_NVME_TCP_SK_ADD, + ctx->stats.rx_nvmeotcp_sk_add) || + nla_put_uint(rsp, + ULP_DDP_A_STATS_RX_NVME_TCP_SK_ADD_FAIL, + ctx->stats.rx_nvmeotcp_sk_add_fail) || + nla_put_uint(rsp, + ULP_DDP_A_STATS_RX_NVME_TCP_SK_DEL, + ctx->stats.rx_nvmeotcp_sk_del) || + nla_put_uint(rsp, + ULP_DDP_A_STATS_RX_NVME_TCP_SETUP, + ctx->stats.rx_nvmeotcp_ddp_setup) || + nla_put_uint(rsp, + ULP_DDP_A_STATS_RX_NVME_TCP_SETUP_FAIL, + ctx->stats.rx_nvmeotcp_ddp_setup_fail) || + nla_put_uint(rsp, + ULP_DDP_A_STATS_RX_NVME_TCP_TEARDOWN, + ctx->stats.rx_nvmeotcp_ddp_teardown) || + nla_put_uint(rsp, + ULP_DDP_A_STATS_RX_NVME_TCP_DROP, + ctx->stats.rx_nvmeotcp_drop) || + nla_put_uint(rsp, + ULP_DDP_A_STATS_RX_NVME_TCP_RESYNC, + ctx->stats.rx_nvmeotcp_resync) || + nla_put_uint(rsp, + ULP_DDP_A_STATS_RX_NVME_TCP_PACKETS, + ctx->stats.rx_nvmeotcp_packets) || + nla_put_uint(rsp, + ULP_DDP_A_STATS_RX_NVME_TCP_BYTES, + ctx->stats.rx_nvmeotcp_bytes)) + goto err_cancel_msg; + } + genlmsg_end(rsp, hdr); + + return 0; + +err_cancel_msg: + genlmsg_cancel(rsp, hdr); + + return -EMSGSIZE; +} + +int ulp_ddp_nl_caps_get_doit(struct sk_buff *req, struct genl_info *info) +{ + struct ulp_ddp_reply_context *ctx = info->user_ptr[0]; + struct sk_buff *rsp; + int ret = 0; + + ret = ulp_ddp_prepare_context(ctx, ULP_DDP_CMD_CAPS_GET); + if (ret) + return ret; + + rsp = genlmsg_new(ulp_ddp_reply_size(ULP_DDP_CMD_CAPS_GET), GFP_KERNEL); + if (!rsp) + return -EMSGSIZE; + + ret = ulp_ddp_write_reply(rsp, ctx, ULP_DDP_CMD_CAPS_GET, info); + if (ret) + goto err_rsp; + + return genlmsg_reply(rsp, info); + +err_rsp: + nlmsg_free(rsp); + return ret; +} + +static void ulp_ddp_nl_notify_dev(struct ulp_ddp_reply_context *ctx) +{ + struct genl_info info; + struct sk_buff *ntf; + int ret; + + if (!genl_has_listeners(&ulp_ddp_nl_family, dev_net(ctx->dev), + ULP_DDP_NLGRP_MGMT)) + return; + + genl_info_init_ntf(&info, &ulp_ddp_nl_family, ULP_DDP_CMD_CAPS_SET_NTF); + ntf = genlmsg_new(ulp_ddp_reply_size(ULP_DDP_CMD_CAPS_SET_NTF), GFP_KERNEL); + if (!ntf) + return; + + ret = ulp_ddp_write_reply(ntf, ctx, ULP_DDP_CMD_CAPS_SET_NTF, &info); + if (ret) { + nlmsg_free(ntf); + return; + } + + genlmsg_multicast_netns(&ulp_ddp_nl_family, dev_net(ctx->dev), ntf, + 0, ULP_DDP_NLGRP_MGMT, GFP_KERNEL); +} + +static int ulp_ddp_apply_bits(struct ulp_ddp_reply_context *ctx, + unsigned long *req_wanted, + unsigned long *req_mask, + struct genl_info *info, + bool *notify) +{ + DECLARE_BITMAP(old_active, ULP_DDP_CAP_COUNT); + DECLARE_BITMAP(new_active, ULP_DDP_CAP_COUNT); + const struct ulp_ddp_dev_ops *ops; + struct ulp_ddp_dev_caps caps; + int ret; + + ops = ctx->dev->netdev_ops->ulp_ddp_ops; + ops->get_caps(ctx->dev, &caps); + + /* new_active = (old_active & ~req_mask) | (wanted & req_mask) + * new_active &= caps_hw + */ + bitmap_copy(old_active, caps.active, ULP_DDP_CAP_COUNT); + bitmap_and(req_wanted, req_wanted, req_mask, ULP_DDP_CAP_COUNT); + bitmap_andnot(new_active, old_active, req_mask, ULP_DDP_CAP_COUNT); + bitmap_or(new_active, new_active, req_wanted, ULP_DDP_CAP_COUNT); + bitmap_and(new_active, new_active, caps.hw, ULP_DDP_CAP_COUNT); + if (!bitmap_equal(old_active, new_active, ULP_DDP_CAP_COUNT)) { + ret = ops->set_caps(ctx->dev, new_active, info->extack); + if (ret) + return ret; + ops->get_caps(ctx->dev, &caps); + bitmap_copy(new_active, caps.active, ULP_DDP_CAP_COUNT); + } + + /* notify if capabilities were changed */ + *notify = !bitmap_equal(old_active, new_active, ULP_DDP_CAP_COUNT); + + return 0; +} + +int ulp_ddp_nl_caps_set_doit(struct sk_buff *skb, struct genl_info *info) +{ + struct ulp_ddp_reply_context *ctx = info->user_ptr[0]; + unsigned long wanted, wanted_mask; + struct sk_buff *rsp; + bool notify = false; + int ret; + + if (GENL_REQ_ATTR_CHECK(info, ULP_DDP_A_CAPS_WANTED) || + GENL_REQ_ATTR_CHECK(info, ULP_DDP_A_CAPS_WANTED_MASK)) + return -EINVAL; + + rsp = genlmsg_new(ulp_ddp_reply_size(ULP_DDP_CMD_CAPS_SET), GFP_KERNEL); + if (!rsp) + return -EMSGSIZE; + + wanted = nla_get_uint(info->attrs[ULP_DDP_A_CAPS_WANTED]); + wanted_mask = nla_get_uint(info->attrs[ULP_DDP_A_CAPS_WANTED_MASK]); + + rtnl_lock(); + ret = ulp_ddp_apply_bits(ctx, &wanted, &wanted_mask, info, ¬ify); + rtnl_unlock(); + if (ret) + goto err_rsp; + + ret = ulp_ddp_prepare_context(ctx, ULP_DDP_CMD_CAPS_SET); + if (ret) + goto err_rsp; + + ret = ulp_ddp_write_reply(rsp, ctx, ULP_DDP_CMD_CAPS_SET, info); + if (ret) + goto err_rsp; + + ret = genlmsg_reply(rsp, info); + if (notify) + ulp_ddp_nl_notify_dev(ctx); + + return ret; + +err_rsp: + nlmsg_free(rsp); + + return ret; +} + +int ulp_ddp_nl_stats_get_doit(struct sk_buff *skb, struct genl_info *info) +{ + struct ulp_ddp_reply_context *ctx = info->user_ptr[0]; + struct sk_buff *rsp; + int ret = 0; + + ret = ulp_ddp_prepare_context(ctx, ULP_DDP_CMD_STATS_GET); + if (ret) + return ret; + + rsp = genlmsg_new(ulp_ddp_reply_size(ULP_DDP_CMD_STATS_GET), GFP_KERNEL); + if (!rsp) + return -EMSGSIZE; + + ret = ulp_ddp_write_reply(rsp, ctx, ULP_DDP_CMD_STATS_GET, info); + if (ret) + goto err_rsp; + + return genlmsg_reply(rsp, info); + +err_rsp: + nlmsg_free(rsp); + return ret; +} + +static int __init ulp_ddp_init(void) +{ + return genl_register_family(&ulp_ddp_nl_family); +} + +subsys_initcall(ulp_ddp_init);