netdev - [iproute2-next] devlink: print maximum number of snapshots if available

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Message-Id: <20210930212050.1673896-1-jacob.e.keller@intel.com>
Date:   Thu, 30 Sep 2021 14:20:50 -0700
From:   Jacob Keller <jacob.e.keller@...el.com>
To:     netdev@...r.kernel.org
Cc:     Jakub Kicinski <kubakici@...pl>, Jiri Pirko <jiri@...nulli.us>,
        Jacob Keller <jacob.e.keller@...el.com>
Subject: [iproute2-next] devlink: print maximum number of snapshots if available

Recently the kernel gained ability to report the maximum number of
snapshots a region can have. Print this value out if it was reported.

Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
---

This requires updating the UAPI headers to the commit which includes the
DEVLINK_ATTR_REGION_MAX_SNAPSHOTS attribute.

 devlink/devlink.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/devlink/devlink.c b/devlink/devlink.c
index 2f2142ed3856..07c4e08ab9d8 100644
--- a/devlink/devlink.c
+++ b/devlink/devlink.c
@@ -7845,6 +7845,10 @@ static void pr_out_region(struct dl *dl, struct nlattr **tb)
 	if (tb[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
 		pr_out_snapshot(dl, tb);
 
+	if (tb[DEVLINK_ATTR_REGION_MAX_SNAPSHOTS])
+		pr_out_u64(dl, "max",
+			   mnl_attr_get_u32(tb[DEVLINK_ATTR_REGION_MAX_SNAPSHOTS]));
+
 	pr_out_region_handle_end(dl);
 }
 

base-commit: 2f5825cb38028a14961a79844a069be4e3057eca
-- 
2.31.1.331.gb0c09ab8796f