[patch iproute2 v2] devlink: relax dpipe table show dependency on resources

[patch iproute2 v2] devlink: relax dpipe table show dependency on resources

[Jiri Pirko]

From: Jiri Pirko <jiri@mellanox.com>

Dpipe table show command has a depencency on getting resources.
If resource get command is not supported by the driver, dpipe table
show fails. However, resource is only additional information
in dpipe table show output. So relax the dependency and let
the dpipe tables be shown even if resources get command fails.

Fixes: ead180274caf ("devlink: Add support for resource/dpipe relation")
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
---
v1->v2:
- removed "!!"
---
 devlink/devlink.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/devlink/devlink.c b/devlink/devlink.c
index 3651e90c1159..cced8d619f9f 100644
--- a/devlink/devlink.c
+++ b/devlink/devlink.c
@@ -4351,7 +4351,8 @@ static int dpipe_table_show(struct dpipe_ctx *ctx, struct nlattr *nl)
 	size = mnl_attr_get_u32(nla_table[DEVLINK_ATTR_DPIPE_TABLE_SIZE]);
 	counters_enabled = !!mnl_attr_get_u8(nla_table[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED]);
 
-	resource_valid = !!nla_table[DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID];
+	resource_valid = nla_table[DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID] &&
+			 ctx->resources;
 	if (resource_valid) {
 		table->resource_id = mnl_attr_get_u64(nla_table[DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID]);
 		table->resource_valid = true;
@@ -4467,12 +4468,9 @@ static int cmd_dpipe_table_show(struct dl *dl)
 	dl_opts_put(nlh, dl);
 	err = _mnlg_socket_sndrcv(dl->nlg, nlh, cmd_resource_dump_cb,
 				  &resource_ctx);
-	if (err) {
-		pr_err("error get resources %s\n", strerror(resource_ctx.err));
-		goto err_resource_dump;
-	}
+	if (!err)
+		dpipe_ctx.resources = resource_ctx.resources;
 
-	dpipe_ctx.resources = resource_ctx.resources;
 	flags = NLM_F_REQUEST | NLM_F_ACK;
 	nlh = mnlg_msg_prepare(dl->nlg, DEVLINK_CMD_DPIPE_TABLE_GET, flags);
 	dl_opts_put(nlh, dl);
@@ -4485,8 +4483,6 @@ static int cmd_dpipe_table_show(struct dl *dl)
 	dpipe_ctx_fini(&dpipe_ctx);
 	return 0;
 
-err_resource_dump:
-	resource_ctx_fini(&resource_ctx);
 err_resource_ctx_init:
 err_headers_get:
 	dpipe_ctx_fini(&dpipe_ctx);
-- 
2.14.5

Re: [patch iproute2 v2] devlink: relax dpipe table show dependency on resources

[Stephen Hemminger]

On Thu, 21 Feb 2019 11:55:56 +0100
Jiri Pirko <jiri@resnulli.us> wrote:

> From: Jiri Pirko <jiri@mellanox.com>
> 
> Dpipe table show command has a depencency on getting resources.
> If resource get command is not supported by the driver, dpipe table
> show fails. However, resource is only additional information
> in dpipe table show output. So relax the dependency and let
> the dpipe tables be shown even if resources get command fails.
> 
> Fixes: ead180274caf ("devlink: Add support for resource/dpipe relation")
> Signed-off-by: Jiri Pirko <jiri@mellanox.com>

Applied