[RFC PATCH iproute2-next 0/3] rdma: IB device rename

[RFC PATCH iproute2-next 0/3] rdma: IB device rename

[Leon Romanovsky]

From: Leon Romanovsky <leonro@mellanox.com>

Hi,

This is comprehensive part of kernel series posted earlier. The kernel
part is not accepted yet, so first patch will have different commit
message with different commit SHA1. This is why it is marked as RFC.

An example:

[leonro@server /]$ lspci |grep -i Ether
00:08.0 Ethernet controller: Red Hat, Inc. Virtio network device
00:09.0 Ethernet controller: Mellanox Technologies MT27700 Family [ConnectX-4]
[leonro@server /]$ sudo rdma dev
1: mlx5_0: node_type ca fw 3.8.9999 node_guid 5254:00c0:fe12:3455 sys_image_guid 5254:00c0:fe12:3455
[leonro@server /]$ sudo rdma dev set mlx5_0 name hfi1_0
[leonro@server /]$ sudo rdma dev
1: hfi1_0: node_type ca fw 3.8.9999 node_guid 5254:00c0:fe12:3455 sys_image_guid 5254:00c0:fe12:3455

Thanks

Leon Romanovsky (3):
  rdma: Update kernel include file to support IB device renaming
  rdma: Introduce command execution helper with required device name
  rdma: Add an option to rename IB device interface

 rdma/dev.c                            | 35 +++++++++++++++++++++++++++++++++++
 rdma/include/uapi/rdma/rdma_netlink.h |  3 ++-
 rdma/rdma.h                           |  1 +
 rdma/utils.c                          | 10 ++++++++++
 4 files changed, 48 insertions(+), 1 deletion(-)

[RFC PATCH iproute2-next 1/3] rdma: Update kernel include file to support IB device renaming

[Leon Romanovsky]

From: Leon Romanovsky <leonro@mellanox.com>

Bring kernel header file changes upto commit 908b44308eda
("RDMA/nldev: Allow IB device rename through RDMA netlink")

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 rdma/include/uapi/rdma/rdma_netlink.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/rdma/include/uapi/rdma/rdma_netlink.h b/rdma/include/uapi/rdma/rdma_netlink.h
index 6513fb89..e2228c09 100644
--- a/rdma/include/uapi/rdma/rdma_netlink.h
+++ b/rdma/include/uapi/rdma/rdma_netlink.h
@@ -227,8 +227,9 @@ enum rdma_nldev_command {
 	RDMA_NLDEV_CMD_UNSPEC,

 	RDMA_NLDEV_CMD_GET, /* can dump */
+	RDMA_NLDEV_CMD_SET,

-	/* 2 - 4 are free to use */
+	/* 3 - 4 are free to use */

 	RDMA_NLDEV_CMD_PORT_GET = 5, /* can dump */

[RFC PATCH iproute2-next 2/3] rdma: Introduce command execution helper with required device name

[Leon Romanovsky]

From: Leon Romanovsky <leonro@mellanox.com>

In contradiction to various show commands, the set command explicitly
requires to use device name as an argument. Provide new command
execution helper which enforces it.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 rdma/rdma.h  |  1 +
 rdma/utils.c | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/rdma/rdma.h b/rdma/rdma.h
index d4b7ba19..dde9e128 100644
--- a/rdma/rdma.h
+++ b/rdma/rdma.h
@@ -90,6 +90,7 @@ int cmd_link(struct rd *rd);
 int cmd_res(struct rd *rd);
 int rd_exec_cmd(struct rd *rd, const struct rd_cmd *c, const char *str);
 int rd_exec_dev(struct rd *rd, int (*cb)(struct rd *rd));
+int rd_exec_require_dev(struct rd *rd, int (*cb)(struct rd *rd));
 int rd_exec_link(struct rd *rd, int (*cb)(struct rd *rd), bool strict_port);
 void rd_free(struct rd *rd);
 int rd_set_arg_to_devname(struct rd *rd);
diff --git a/rdma/utils.c b/rdma/utils.c
index 4840bf22..61f4aeb1 100644
--- a/rdma/utils.c
+++ b/rdma/utils.c
@@ -577,6 +577,16 @@ out:
 	return ret;
 }

+int rd_exec_require_dev(struct rd *rd, int (*cb)(struct rd *rd))
+{
+	if (rd_no_arg(rd)) {
+		pr_err("Please provide device name.\n");
+		return -EINVAL;
+	}
+
+	return rd_exec_dev(rd, cb);
+}
+
 int rd_exec_cmd(struct rd *rd, const struct rd_cmd *cmds, const char *str)
 {
 	const struct rd_cmd *c;

[RFC PATCH iproute2-next 3/3] rdma: Add an option to rename IB device interface

[Leon Romanovsky]

From: Leon Romanovsky <leonro@mellanox.com>

Enrich rdmatool with an option to rename IB devices,
the command interface follows Iproute2 convention:
"rdma dev set [OLD-DEVNAME] name NEW-DEVNAME"

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 rdma/dev.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/rdma/dev.c b/rdma/dev.c
index e2eafe47..760b7fb3 100644
--- a/rdma/dev.c
+++ b/rdma/dev.c
@@ -14,6 +14,7 @@
 static int dev_help(struct rd *rd)
 {
 	pr_out("Usage: %s dev show [DEV]\n", rd->filename);
+	pr_out("       %s dev set [DEV] name DEVNAME\n", rd->filename);
 	return 0;
 }

@@ -240,17 +241,51 @@ static int dev_one_show(struct rd *rd)
 	return rd_exec_cmd(rd, cmds, "parameter");
 }

+static int dev_set_name(struct rd *rd)
+{
+	uint32_t seq;
+
+	if (rd_no_arg(rd)) {
+		pr_err("Please provide device new name.\n");
+		return -EINVAL;
+	}
+
+	rd_prepare_msg(rd, RDMA_NLDEV_CMD_SET,
+		       &seq, (NLM_F_REQUEST | NLM_F_ACK));
+	mnl_attr_put_u32(rd->nlh, RDMA_NLDEV_ATTR_DEV_INDEX, rd->dev_idx);
+	mnl_attr_put_strz(rd->nlh, RDMA_NLDEV_ATTR_DEV_NAME, rd_argv(rd));
+
+	return rd_send_msg(rd);
+}
+
+static int dev_one_set(struct rd *rd)
+{
+	const struct rd_cmd cmds[] = {
+		{ NULL,		dev_help},
+		{ "name",	dev_set_name},
+		{ 0 }
+	};
+
+	return rd_exec_cmd(rd, cmds, "parameter");
+}
+
 static int dev_show(struct rd *rd)
 {
 	return rd_exec_dev(rd, dev_one_show);
 }

+static int dev_set(struct rd *rd)
+{
+	return rd_exec_require_dev(rd, dev_one_set);
+}
+
 int cmd_dev(struct rd *rd)
 {
 	const struct rd_cmd cmds[] = {
 		{ NULL,		dev_show },
 		{ "show",	dev_show },
 		{ "list",	dev_show },
+		{ "set",	dev_set },
 		{ "help",	dev_help },
 		{ 0 }
 	};