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[iproute2-next,v3,1/3] update <linux/devlink.h> UAPI header

Message ID 20220725205650.4018731-2-jacob.e.keller@intel.com (mailing list archive)
State Awaiting Upstream
Delegated to: David Ahern
Headers show
Series devlink: support dry run attribute for flash update | expand

Checks

Context Check Description
netdev/tree_selection success Not a local patch

Commit Message

Jacob Keller July 25, 2022, 8:56 p.m. UTC 
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
---
 include/uapi/linux/devlink.h | 8 ++++++++
 1 file changed, 8 insertions(+)
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Patch

diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
index da0f1ba8f7a0..90f6cf97d308 100644
--- a/include/uapi/linux/devlink.h
+++ b/include/uapi/linux/devlink.h
@@ -576,6 +576,14 @@  enum devlink_attr {
 	DEVLINK_ATTR_LINECARD_TYPE,		/* string */
 	DEVLINK_ATTR_LINECARD_SUPPORTED_TYPES,	/* nested */
 
+	/* Before adding this attribute to a command, user space should check
+	 * the policy dump and verify the kernel recognizes the attribute.
+	 * Otherwise older kernels which do not recognize the attribute may
+	 * silently accept the unknown attribute while not actually performing
+	 * a dry run.
+	 */
+	DEVLINK_ATTR_DRY_RUN,			/* flag */
+
 	/* add new attributes above here, update the policy in devlink.c */
 
 	__DEVLINK_ATTR_MAX,