linux-kernel - [PATCH RFC] rdma: Add support to dump SRQ resource in raw format

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Date:   Mon, 18 Sep 2023 21:11:40 +0800
From:   Junxian Huang <huangjunxian6@...ilicon.com>
To:     <jgg@...pe.ca>, <leon@...nel.org>
CC:     <linux-rdma@...r.kernel.org>, <linuxarm@...wei.com>,
        <linux-kernel@...r.kernel.org>, <huangjunxian6@...ilicon.com>
Subject: [PATCH RFC] rdma: Add support to dump SRQ resource in raw format

From: wenglianfa <wenglianfa@...wei.com>

Add support to dump SRQ resource in raw format.

This patch relies on the corresponding kernel patch:
RDMA/core: Add support to dump SRQ resource in RAW format

Example:
$ rdma res show srq -r
dev hns3 149000...

$ rdma res show srq -j -r
[{"ifindex":0,"ifname":"hns3","data":[149,0,0,...]}]

Signed-off-by: wenglianfa <wenglianfa@...wei.com>
---
 rdma/include/uapi/rdma/rdma_netlink.h |  2 ++
 rdma/res-srq.c                        | 17 ++++++++++++++++-
 rdma/res.h                            |  2 ++
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/rdma/include/uapi/rdma/rdma_netlink.h b/rdma/include/uapi/rdma/rdma_netlink.h
index 92c528a0..84f775be 100644
--- a/rdma/include/uapi/rdma/rdma_netlink.h
+++ b/rdma/include/uapi/rdma/rdma_netlink.h
@@ -299,6 +299,8 @@ enum rdma_nldev_command {
 
 	RDMA_NLDEV_CMD_STAT_GET_STATUS,
 
+	RDMA_NLDEV_CMD_RES_SRQ_GET_RAW,
+
 	RDMA_NLDEV_NUM_OPS
 };
 
diff --git a/rdma/res-srq.c b/rdma/res-srq.c
index 186ae281..d2581a3f 100644
--- a/rdma/res-srq.c
+++ b/rdma/res-srq.c
@@ -162,6 +162,20 @@ out:
 	return -EINVAL;
 }
 
+static int res_srq_line_raw(struct rd *rd, const char *name, int idx,
+			    struct nlattr **nla_line)
+{
+	if (!nla_line[RDMA_NLDEV_ATTR_RES_RAW])
+		return MNL_CB_ERROR;
+
+	open_json_object(NULL);
+	print_dev(rd, idx, name);
+	print_raw_data(rd, nla_line);
+	newline(rd);
+
+	return MNL_CB_OK;
+}
+
 static int res_srq_line(struct rd *rd, const char *name, int idx,
 			struct nlattr **nla_line)
 {
@@ -276,7 +290,8 @@ int res_srq_parse_cb(const struct nlmsghdr *nlh, void *data)
 		if (ret != MNL_CB_OK)
 			break;
 
-		ret = res_srq_line(rd, name, idx, nla_line);
+		ret = (rd->show_raw) ? res_srq_line_raw(rd, name, idx, nla_line) :
+		       res_srq_line(rd, name, idx, nla_line);
 		if (ret != MNL_CB_OK)
 			break;
 	}
diff --git a/rdma/res.h b/rdma/res.h
index 70e51acd..e880c28b 100644
--- a/rdma/res.h
+++ b/rdma/res.h
@@ -39,6 +39,8 @@ static inline uint32_t res_get_command(uint32_t command, struct rd *rd)
 		return RDMA_NLDEV_CMD_RES_CQ_GET_RAW;
 	case RDMA_NLDEV_CMD_RES_MR_GET:
 		return RDMA_NLDEV_CMD_RES_MR_GET_RAW;
+	case RDMA_NLDEV_CMD_RES_SRQ_GET:
+		return RDMA_NLDEV_CMD_RES_SRQ_GET_RAW;
 	default:
 		return command;
 	}
-- 
2.30.0