[PATCH iproute2-next 6/7] devlink: add per-port resource show support

[Tariq Toukan <tariqt@nvidia.com>]

From: Or Har-Toov <ohartoov@nvidia.com>

Extend 'devlink resource show' to accept DEV/PORT_INDEX, sending
DEVLINK_ATTR_PORT_INDEX to the kernel so it returns only that port's
resources directly.

For example:

$ devlink resource show pci/0000:03:00.0/196608
pci/0000:03:00.0/196608:
  name max_SFs size 128 unit entry dpipe_tables none

Signed-off-by: Or Har-Toov <ohartoov@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---
 bash-completion/devlink     |  1 +
 devlink/devlink.c           |  5 +++--
 man/man8/devlink-resource.8 | 17 ++++++++++++++++-
 3 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/bash-completion/devlink b/bash-completion/devlink
index 7ec6a7cb6abd..3d8452a8869e 100644
--- a/bash-completion/devlink
+++ b/bash-completion/devlink
@@ -704,6 +704,7 @@ _devlink_resource()
         show)
             if [[ $cword -eq 3 ]]; then
                 _devlink_direct_complete "dev"
+                _devlink_direct_complete "port"
             fi
             return
             ;;
diff --git a/devlink/devlink.c b/devlink/devlink.c
index 737cfc7437f9..4224b7fa6792 100644
--- a/devlink/devlink.c
+++ b/devlink/devlink.c
@@ -9013,7 +9013,8 @@ static int cmd_resource_show(struct dl *dl)
 	int err;
 
 	err = dl_argv_parse_with_selector(dl, &flags, DEVLINK_CMD_RESOURCE_DUMP,
-					  DL_OPT_HANDLE, 0, 0, 0);
+					  DL_OPT_HANDLE | DL_OPT_HANDLEP,
+					  0, 0, 0);
 	if (err)
 		return err;
 
@@ -9035,7 +9036,7 @@ static int cmd_resource_show(struct dl *dl)
 
 static void cmd_resource_help(void)
 {
-	pr_err("Usage: devlink resource show [ DEV ]\n"
+	pr_err("Usage: devlink resource show [ DEV[/PORT_INDEX] ]\n"
 	       "       devlink resource set DEV path PATH size SIZE\n");
 }
 
diff --git a/man/man8/devlink-resource.8 b/man/man8/devlink-resource.8
index b55138d950c7..1e7d96126ce5 100644
--- a/man/man8/devlink-resource.8
+++ b/man/man8/devlink-resource.8
@@ -19,7 +19,7 @@ devlink-resource \- devlink device resource configuration
 
 .ti -8
 .B devlink resource show
-.RI "[ " DEV " ]"
+.RI "[ " DEV "[/" PORT_INDEX "] ]"
 
 .ti -8
 .B devlink resource help
@@ -43,6 +43,16 @@ Format is:
 .in +2
 BUS_NAME/BUS_ADDRESS
 
+.PP
+.I "PORT_INDEX"
+- specifies the port to show resources for.
+When given, only port-level resources for that port are shown.
+
+.in +4
+Format is:
+.in +2
+BUS_NAME/BUS_ADDRESS/PORT_INDEX
+
 .SS devlink resource set - sets resource size of specific resource
 
 .PP
@@ -69,6 +79,11 @@ devlink resource show pci/0000:01:00.0
 Shows the resources of the specified devlink device.
 .RE
 .PP
+devlink resource show pci/0000:01:00.0/1
+.RS 4
+Shows port-level resources for port 1 of the specified devlink device.
+.RE
+.PP
 devlink resource set pci/0000:01:00.0 path /kvd/linear size 98304
 .RS 4
 Sets the size of the specified resource for the specified devlink device.
-- 
2.44.0