netdev - [patch iproute2 07/11] devlink: introduce dump filtering function

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Date:	Fri, 15 Apr 2016 09:51:49 +0200
From:	Jiri Pirko <jiri@...nulli.us>
To:	netdev@...r.kernel.org
Cc:	stephen@...workplumber.org, davem@...emloft.net,
	idosch@...lanox.com, eladr@...lanox.com, yotamg@...lanox.com,
	ogerlitz@...lanox.com, roopa@...ulusnetworks.com,
	nikolay@...ulusnetworks.com, jhs@...atatu.com,
	john.fastabend@...il.com, rami.rosen@...el.com,
	gospo@...ulusnetworks.com, sfeldma@...il.com
Subject: [patch iproute2 07/11] devlink: introduce dump filtering function

From: Jiri Pirko <jiri@...lanox.com>

This function is to be used from dump callbacks to decide if the output
currect output should be filtered off or not. Filtering is based on
previously parsed and stored command line options.

Signed-off-by: Jiri Pirko <jiri@...lanox.com>
---
 devlink/devlink.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/devlink/devlink.c b/devlink/devlink.c
index 0c2132f..d436bbf 100644
--- a/devlink/devlink.c
+++ b/devlink/devlink.c
@@ -563,6 +563,36 @@ static int dl_argv_parse_put(struct nlmsghdr *nlh, struct dl *dl,
 	return 0;
 }
 
+static bool dl_dump_filter(struct dl *dl, struct nlattr **tb)
+{
+	struct dl_opts *opts = &dl->opts;
+	struct nlattr *attr_bus_name = tb[DEVLINK_ATTR_BUS_NAME];
+	struct nlattr *attr_dev_name = tb[DEVLINK_ATTR_DEV_NAME];
+	struct nlattr *attr_port_index = tb[DEVLINK_ATTR_PORT_INDEX];
+
+	if (opts->present & DL_OPT_HANDLE &&
+	    attr_bus_name && attr_dev_name) {
+		const char *bus_name = mnl_attr_get_str(attr_bus_name);
+		const char *dev_name = mnl_attr_get_str(attr_dev_name);
+
+		if (strcmp(bus_name, opts->bus_name) != 0 ||
+		    strcmp(dev_name, opts->dev_name) != 0)
+			return false;
+	}
+	if (opts->present & DL_OPT_HANDLEP &&
+	    attr_bus_name && attr_dev_name && attr_port_index) {
+		const char *bus_name = mnl_attr_get_str(attr_bus_name);
+		const char *dev_name = mnl_attr_get_str(attr_dev_name);
+		uint32_t port_index = mnl_attr_get_u32(attr_port_index);
+
+		if (strcmp(bus_name, opts->bus_name) != 0 ||
+		    strcmp(dev_name, opts->dev_name) != 0 ||
+		    port_index != opts->port_index)
+			return false;
+	}
+	return true;
+}
+
 static void cmd_dev_help(void)
 {
 	pr_out("Usage: devlink dev show [ DEV ]\n");
-- 
2.5.5