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wifi: cfg80211: allow suppressing FTM result reporting for PD requests

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Proximity detection often does not require detailed ranging
measurements, yet userspace currently receives full FTM results for
every request, causing unnecessary data transfer, host wakeups, and
processing overhead.

Add an optional control to suppress ranging result reporting for
peer-to-peer PD requests. Introduce the
NL80211_PMSR_FTM_REQ_ATTR_PD_SUPPRESS_RESULTS flag; when set with a
PD request, the device may perform the measurements (e.g. when acting
as RSTA) but must not report the measurement results to userspace.

Validate that the flag is only accepted when request_type is set to
NL80211_PMSR_FTM_REQ_TYPE_PD, reject otherwise.

Signed-off-by: Peddolla Harshavardhan Reddy <peddolla.reddy@oss.qualcomm.com>
Link: https://patch.msgid.link/20260420090856.2152905-12-peddolla.reddy@oss.qualcomm.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Peddolla Harshavardhan Reddy
2026-04-20 14:38:54 +05:30
committed by Johannes Berg
parent 5733daa670
commit 410aa47fd9
4 changed files with 24 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
include/net/cfg80211.h
View File

@@ -4634,6 +4634,11 @@ struct cfg80211_pmsr_result {
* is set, only the specified threshold is used. If both are set, both
* thresholds are applied. If neither is set, results are reported without
* threshold filtering.
* @pd_suppress_range_results: flag to suppress ranging results for PD
* requests. When set, the device performs ranging measurements to
* provide ranging services to a peer (e.g. in RSTA role) but does
* not report the measurement results to userspace. Only valid when
* @request_type is %NL80211_PMSR_FTM_REQ_TYPE_PD.
*
* See also nl80211 for the respective attribute documentation.
*/
@@ -4662,6 +4667,7 @@ struct cfg80211_pmsr_ftm_request_peer {
u32 num_measurements;
u64 ingress_distance;
u64 egress_distance;
u8 pd_suppress_range_results:1;
};
/**

6
include/uapi/linux/nl80211.h
View File

@@ -8363,6 +8363,11 @@ enum nl80211_peer_measurement_ftm_type_capa {
* threshold is used. If both are specified, both thresholds are applied.
* If neither is specified, results are reported without threshold
* filtering.
* @NL80211_PMSR_FTM_REQ_ATTR_PD_SUPPRESS_RESULTS: Flag to suppress ranging
* results for PD requests. When set, ranging measurements are performed
* but results are not reported to userspace, regardless of ranging role
* or type. Only valid when %NL80211_PMSR_PEER_ATTR_REQ_TYPE is set to
* %NL80211_PMSR_FTM_REQ_TYPE_PD.
*
* @NUM_NL80211_PMSR_FTM_REQ_ATTR: internal
* @NL80211_PMSR_FTM_REQ_ATTR_MAX: highest attribute number
@@ -8392,6 +8397,7 @@ enum nl80211_peer_measurement_ftm_req {
NL80211_PMSR_FTM_REQ_ATTR_PAD,
NL80211_PMSR_FTM_REQ_ATTR_INGRESS,
NL80211_PMSR_FTM_REQ_ATTR_EGRESS,
NL80211_PMSR_FTM_REQ_ATTR_PD_SUPPRESS_RESULTS,
/* keep last */
NUM_NL80211_PMSR_FTM_REQ_ATTR,

1
net/wireless/nl80211.c
View File

@@ -487,6 +487,7 @@ nl80211_pmsr_ftm_req_attr_policy[NL80211_PMSR_FTM_REQ_ATTR_MAX + 1] = {
[NL80211_PMSR_FTM_REQ_ATTR_NUM_MEASUREMENTS] = { .type = NLA_U32 },
[NL80211_PMSR_FTM_REQ_ATTR_INGRESS] = { .type = NLA_U64 },
[NL80211_PMSR_FTM_REQ_ATTR_EGRESS] = { .type = NLA_U64 },
[NL80211_PMSR_FTM_REQ_ATTR_PD_SUPPRESS_RESULTS] = { .type = NLA_FLAG },
};
static const struct nla_policy

11
net/wireless/pmsr.c
View File

@@ -289,6 +289,17 @@ static int pmsr_parse_ftm(struct cfg80211_registered_device *rdev,
out->ftm.egress_distance =
nla_get_u64(tb[NL80211_PMSR_FTM_REQ_ATTR_EGRESS]);
out->ftm.pd_suppress_range_results =
nla_get_flag(tb[NL80211_PMSR_FTM_REQ_ATTR_PD_SUPPRESS_RESULTS]);
if (out->ftm.request_type != NL80211_PMSR_FTM_REQ_TYPE_PD &&
out->ftm.pd_suppress_range_results) {
NL_SET_ERR_MSG_ATTR(info->extack,
tb[NL80211_PMSR_FTM_REQ_ATTR_PD_SUPPRESS_RESULTS],
"FTM: suppress range result flag only valid for PD requests");
return -EINVAL;
}
return 0;
}