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Date: Wed, 28 Nov 2018 20:26:45 +0200
From: Leon Romanovsky <leon@...nel.org>
To: Steve Wise <swise@...ngridcomputing.com>
Cc: dsahern@...il.com, stephen@...workplumber.org,
netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
BMT@...ich.ibm.com
Subject: Re: [PATCH RFC iproute2-next 1/2] rdma: add 'link add/delete'
commands
On Thu, Sep 13, 2018 at 10:19:21AM -0700, Steve Wise wrote:
> Add new 'link' subcommand 'add' and 'delete' to allow binding a soft-rdma
> device to a netdev interface.
>
> EG:
>
> rdma link add rxe_eth0 type rxe dev eth0
> rdma link delete rxe_eth0
>
> Signed-off-by: Steve Wise <swise@...ngridcomputing.com>
> ---
> rdma/link.c | 106 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> rdma/rdma.h | 1 +
> rdma/utils.c | 2 +-
> 3 files changed, 108 insertions(+), 1 deletion(-)
>
> diff --git a/rdma/link.c b/rdma/link.c
> index 7a6d4b7e356d..d4f76b0ce11f 100644
> --- a/rdma/link.c
> +++ b/rdma/link.c
> @@ -14,6 +14,8 @@
> static int link_help(struct rd *rd)
> {
> pr_out("Usage: %s link show [DEV/PORT_INDEX]\n", rd->filename);
> + pr_out("Usage: %s link add NAME type TYPE dev DEV\n", rd->filename);
I suggest to rename "dev" to be "netdev", because we are using "dev" for
ib devices.
> + pr_out("Usage: %s link delete NAME type TYPE\n", rd->filename);
Why do you need "type" for "delete" command?
> return 0;
> }
>
> @@ -315,10 +317,114 @@ static int link_show(struct rd *rd)
> return rd_exec_link(rd, link_one_show, true);
> }
>
> +static int link_add_parse_cb(const struct nlmsghdr *nlh, void *data)
> +{
> + return MNL_CB_OK;
> +}
> +
> +static int link_add(struct rd *rd)
> +{
> + char *name;
> + char *type = NULL;
> + char *dev = NULL;
> + uint32_t seq;
> + int ret;
> +
> + if (rd_no_arg(rd)) {
> + pr_err("No link name was supplied\n");
> + return -EINVAL;
> + }
> + name = rd_argv(rd);
> + rd_arg_inc(rd);
> + while (!rd_no_arg(rd)) {
> + if (rd_argv_match(rd, "type")) {
> + rd_arg_inc(rd);
> + type = rd_argv(rd);
> + } else if (rd_argv_match(rd, "dev")) {
> + rd_arg_inc(rd);
> + dev = rd_argv(rd);
> + } else {
> + pr_err("Invalid parameter %s\n", rd_argv(rd));
> + return -EINVAL;
> + }
> + rd_arg_inc(rd);
> + }
> + if (!type) {
> + pr_err("No type was supplied\n");
> + return -EINVAL;
> + }
> + if (!dev) {
> + pr_err("No net device was supplied\n");
> + return -EINVAL;
> + }
> +
> + rd_prepare_msg(rd, RDMA_NLDEV_CMD_NEWLINK, &seq,
> + (NLM_F_REQUEST | NLM_F_ACK));
> + mnl_attr_put_strz(rd->nlh, RDMA_NLDEV_ATTR_DEV_NAME, name);
> + mnl_attr_put_strz(rd->nlh, RDMA_NLDEV_ATTR_LINK_TYPE, type);
> + mnl_attr_put_strz(rd->nlh, RDMA_NLDEV_ATTR_NDEV_NAME, dev);
> + ret = rd_send_msg(rd);
> + if (ret)
> + return ret;
> +
> + ret = rd_recv_msg(rd, link_add_parse_cb, rd, seq);
> + if (ret)
> + perror(NULL);
Why do you need rd_recv_msg()? I think that it is not needed, at least
for rename, I didn't need it.
https://git.kernel.org/pub/scm/network/iproute2/iproute2-next.git/tree/rdma/dev.c#n244
> + return ret;
> +}
> +
> +static int link_del_parse_cb(const struct nlmsghdr *nlh, void *data)
> +{
> + return MNL_CB_OK;
> +}
> +
> +static int link_del(struct rd *rd)
> +{
> + char *name;
> + char *type = NULL;
> + uint32_t seq;
> + int ret;
> +
> + if (rd_no_arg(rd)) {
> + pr_err("No link type was supplied\n");
> + return -EINVAL;
> + }
> + name = rd_argv(rd);
> + rd_arg_inc(rd);
> + while (!rd_no_arg(rd)) {
> + if (rd_argv_match(rd, "type")) {
> + rd_arg_inc(rd);
> + type = rd_argv(rd);
> + } else {
> + pr_err("Invalid parameter %s\n", rd_argv(rd));
> + return -EINVAL;
> + }
> + rd_arg_inc(rd);
> + }
> + if (!type) {
> + pr_err("No type was supplied\n");
> + return -EINVAL;
> + }
> + rd_prepare_msg(rd, RDMA_NLDEV_CMD_DELLINK, &seq,
> + (NLM_F_REQUEST | NLM_F_ACK));
> + mnl_attr_put_strz(rd->nlh, RDMA_NLDEV_ATTR_DEV_NAME, name);
> + mnl_attr_put_strz(rd->nlh, RDMA_NLDEV_ATTR_LINK_TYPE, type);
> + ret = rd_send_msg(rd);
> + if (ret)
> + return ret;
> +
> + ret = rd_recv_msg(rd, link_del_parse_cb, rd, seq);
> + if (ret)
> + perror(NULL);
> + return ret;
The same question as above.
> +}
> +
> int cmd_link(struct rd *rd)
> {
> const struct rd_cmd cmds[] = {
> { NULL, link_show },
> + { "add", link_add },
> + { "delete", link_del },
> { "show", link_show },
> { "list", link_show },
> { "help", link_help },
> diff --git a/rdma/rdma.h b/rdma/rdma.h
> index 547bb5749a39..b5271e423c10 100644
> --- a/rdma/rdma.h
> +++ b/rdma/rdma.h
> @@ -79,6 +79,7 @@ struct rd_cmd {
> */
> bool rd_no_arg(struct rd *rd);
> void rd_arg_inc(struct rd *rd);
> +bool rd_argv_match(struct rd *rd, const char *pattern);
>
> char *rd_argv(struct rd *rd);
>
> diff --git a/rdma/utils.c b/rdma/utils.c
> index 61f4aeb1bcf2..41f8f7391279 100644
> --- a/rdma/utils.c
> +++ b/rdma/utils.c
> @@ -32,7 +32,7 @@ int strcmpx(const char *str1, const char *str2)
> return strncmp(str1, str2, strlen(str1));
> }
>
> -static bool rd_argv_match(struct rd *rd, const char *pattern)
> +bool rd_argv_match(struct rd *rd, const char *pattern)
> {
> if (!rd_argc(rd))
> return false;
> --
> 1.8.3.1
>
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