rdma: Add an option to rename IB device interface

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>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: David Ahern <dsahern@gmail.com>

diff --git a/rdma/dev.c b/rdma/dev.c
index e2eafe47311b0a43d48aca10e3023531a2d52644..760b7fb3bb18fd2011c39890217ab3dd13190192 100644 (file)
--- 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 }
        };