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cfg80211: add support to probe unexercised mesh link

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Adding support to allow mesh HWMP to measure link metrics on unexercised
direct mesh path by sending some data frames to other mesh points which
are not currently selected as a primary traffic path but only 1 hop away.
The absence of the primary path to the chosen node makes it necessary to
apply some form of marking on a chosen packet stream so that the packets
can be properly steered to the selected node for testing, and not by the
regular mesh path lookup.

Tested-by: Pradeep Kumar Chitrapu <pradeepc@codeaurora.org>
Signed-off-by: Rajkumar Manoharan <rmanohar@codeaurora.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Rajkumar Manoharan
2019-04-11 13:47:24 -07:00
committed by Johannes Berg
parent 387bc00225
commit 5ab92e7fe4
5 changed files with 101 additions and 0 deletions
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17
include/uapi/linux/nl80211.h
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@@ -1070,6 +1070,21 @@
* OWE AKM by the host drivers that implement SME but rely
* on the user space for the cryptographic/DH IE processing in AP mode.
*
* @NL80211_CMD_PROBE_MESH_LINK: The requirement for mesh link metric
* refreshing, is that from one mesh point we be able to send some data
* frames to other mesh points which are not currently selected as a
* primary traffic path, but which are only 1 hop away. The absence of
* the primary path to the chosen node makes it necessary to apply some
* form of marking on a chosen packet stream so that the packets can be
* properly steered to the selected node for testing, and not by the
* regular mesh path lookup. Further, the packets must be of type data
* so that the rate control (often embedded in firmware) is used for
* rate selection.
*
* Here attribute %NL80211_ATTR_MAC is used to specify connected mesh
* peer MAC address and %NL80211_ATTR_FRAME is used to specify the frame
* content. The frame is ethernet data.
*
* @NL80211_CMD_MAX: highest used command number
* @__NL80211_CMD_AFTER_LAST: internal use
*/
@@ -1292,6 +1307,8 @@ enum nl80211_commands {
NL80211_CMD_UPDATE_OWE_INFO,
NL80211_CMD_PROBE_MESH_LINK,
/* add new commands above here */
/* used to define NL80211_CMD_MAX below */