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Message-ID: <20230124145430.365495-2-jaewan@google.com>
Date: Tue, 24 Jan 2023 14:54:29 +0000
From: Jaewan Kim <jaewan@...gle.com>
To: gregkh@...uxfoundation.org, johannes@...solutions.net,
linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Cc: kernel-team@...roid.com, adelva@...gle.com,
Jaewan Kim <jaewan@...gle.com>
Subject: [PATCH v6 1/2] mac80211_hwsim: add PMSR capability support
This CL allows mac80211_hwsim to be configured with PMSR capability.
The capability is mandatory because nl80211_pmsr_start() ignores
incoming PMSR request if PMSR capability isn't set in the wiphy.
This CL adds HWSIM_ATTR_PMSR_SUPPORT.
It can be used to set PMSR capability when creating a new radio.
To send extra details, HWSIM_ATTR_PMSR_SUPPORT can have nested
PMSR capability attributes defined in the nl80211.h.
Data format is the same as cfg80211_pmsr_capabilities.
If HWSIM_ATTR_PMSR_SUPPORT is specified, mac80211_hwsim builds
cfg80211_pmsr_capabilities and sets wiphy.pmsr_capa.
Signed-off-by: Jaewan Kim <jaewan@...gle.com>
---
V5 -> V6: Added per change patch history.
V4 -> V5: Fixed style for commit messages.
V3 -> V4: Added change details for new attribute, and fixed memory leak.
V1 -> V3: Initial commit (includes resends).
---
drivers/net/wireless/mac80211_hwsim.c | 159 +++++++++++++++++++++++-
drivers/net/wireless/mac80211_hwsim.h | 2 +
include/net/cfg80211.h | 10 ++
net/wireless/nl80211.c | 17 ++-
4 files changed, 181 insertions(+), 7 deletions(-)
diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index c57c8903b7c0..84c9db9178c3 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -719,6 +719,9 @@ struct mac80211_hwsim_data {
/* RSSI in rx status of the receiver */
int rx_rssi;
+ /* only used when pmsr capability is supplied */
+ struct cfg80211_pmsr_capabilities pmsr_capa;
+
struct mac80211_hwsim_link_data link_data[IEEE80211_MLD_MAX_NUM_LINKS];
};
@@ -760,6 +763,37 @@ static const struct genl_multicast_group hwsim_mcgrps[] = {
/* MAC80211_HWSIM netlink policy */
+static const struct nla_policy
+hwsim_ftm_capa_policy[NL80211_PMSR_FTM_CAPA_ATTR_MAX + 1] = {
+ [NL80211_PMSR_FTM_CAPA_ATTR_ASAP] = { .type = NLA_FLAG },
+ [NL80211_PMSR_FTM_CAPA_ATTR_NON_ASAP] = { .type = NLA_FLAG },
+ [NL80211_PMSR_FTM_CAPA_ATTR_REQ_LCI] = { .type = NLA_FLAG },
+ [NL80211_PMSR_FTM_CAPA_ATTR_REQ_CIVICLOC] = { .type = NLA_FLAG },
+ [NL80211_PMSR_FTM_CAPA_ATTR_PREAMBLES] = { .type = NLA_U32 },
+ [NL80211_PMSR_FTM_CAPA_ATTR_BANDWIDTHS] = { .type = NLA_U32 },
+ [NL80211_PMSR_FTM_CAPA_ATTR_MAX_BURSTS_EXPONENT] =
+ NLA_POLICY_MAX(NLA_U8, 15),
+ [NL80211_PMSR_FTM_CAPA_ATTR_MAX_FTMS_PER_BURST] =
+ NLA_POLICY_MAX(NLA_U8, 31),
+ [NL80211_PMSR_FTM_CAPA_ATTR_TRIGGER_BASED] = { .type = NLA_FLAG },
+ [NL80211_PMSR_FTM_CAPA_ATTR_NON_TRIGGER_BASED] = { .type = NLA_FLAG },
+};
+
+static const struct nla_policy
+hwsim_pmsr_type_policy[NL80211_PMSR_TYPE_MAX + 1] = {
+ [NL80211_PMSR_TYPE_FTM] = NLA_POLICY_NESTED(hwsim_ftm_capa_policy),
+};
+
+static const struct nla_policy
+hwsim_pmsr_capa_policy[NL80211_PMSR_ATTR_MAX + 1] = {
+ [NL80211_PMSR_ATTR_MAX_PEERS] = { .type = NLA_U32 },
+ [NL80211_PMSR_ATTR_REPORT_AP_TSF] = { .type = NLA_FLAG },
+ [NL80211_PMSR_ATTR_RANDOMIZE_MAC_ADDR] = { .type = NLA_FLAG },
+ [NL80211_PMSR_ATTR_TYPE_CAPA] =
+ NLA_POLICY_NESTED(hwsim_pmsr_type_policy),
+ [NL80211_PMSR_ATTR_PEERS] = { .type = NLA_REJECT }, // only for request.
+};
+
static const struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {
[HWSIM_ATTR_ADDR_RECEIVER] = NLA_POLICY_ETH_ADDR_COMPAT,
[HWSIM_ATTR_ADDR_TRANSMITTER] = NLA_POLICY_ETH_ADDR_COMPAT,
@@ -788,6 +822,7 @@ static const struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {
[HWSIM_ATTR_IFTYPE_SUPPORT] = { .type = NLA_U32 },
[HWSIM_ATTR_CIPHER_SUPPORT] = { .type = NLA_BINARY },
[HWSIM_ATTR_MLO_SUPPORT] = { .type = NLA_FLAG },
+ [HWSIM_ATTR_PMSR_SUPPORT] = NLA_POLICY_NESTED(hwsim_pmsr_capa_policy),
};
#if IS_REACHABLE(CONFIG_VIRTIO)
@@ -3107,6 +3142,18 @@ static int mac80211_hwsim_change_sta_links(struct ieee80211_hw *hw,
return 0;
}
+static int mac80211_hwsim_start_pmsr(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+ struct cfg80211_pmsr_request *request)
+{
+ return -EOPNOTSUPP;
+}
+
+static void mac80211_hwsim_abort_pmsr(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+ struct cfg80211_pmsr_request *request)
+{
+ // Do nothing for now.
+}
+
#define HWSIM_COMMON_OPS \
.tx = mac80211_hwsim_tx, \
.wake_tx_queue = ieee80211_handle_wake_tx_queue, \
@@ -3129,7 +3176,9 @@ static int mac80211_hwsim_change_sta_links(struct ieee80211_hw *hw,
.flush = mac80211_hwsim_flush, \
.get_et_sset_count = mac80211_hwsim_get_et_sset_count, \
.get_et_stats = mac80211_hwsim_get_et_stats, \
- .get_et_strings = mac80211_hwsim_get_et_strings,
+ .get_et_strings = mac80211_hwsim_get_et_strings, \
+ .start_pmsr = mac80211_hwsim_start_pmsr, \
+ .abort_pmsr = mac80211_hwsim_abort_pmsr,
#define HWSIM_NON_MLO_OPS \
.sta_add = mac80211_hwsim_sta_add, \
@@ -3186,6 +3235,7 @@ struct hwsim_new_radio_params {
u32 *ciphers;
u8 n_ciphers;
bool mlo;
+ const struct cfg80211_pmsr_capabilities *pmsr_capa;
};
static void hwsim_mcast_config_msg(struct sk_buff *mcast_skb,
@@ -3260,7 +3310,10 @@ static int append_radio_msg(struct sk_buff *skb, int id,
return ret;
}
- return 0;
+ if (param->pmsr_capa)
+ ret = cfg80211_send_pmsr_capa(param->pmsr_capa, skb);
+
+ return ret;
}
static void hwsim_mcast_new_radio(int id, struct genl_info *info,
@@ -4606,6 +4659,11 @@ static int mac80211_hwsim_new_radio(struct genl_info *info,
data->debugfs,
data, &hwsim_simulate_radar);
+ if (param->pmsr_capa) {
+ data->pmsr_capa = *param->pmsr_capa;
+ hw->wiphy->pmsr_capa = &data->pmsr_capa;
+ }
+
spin_lock_bh(&hwsim_radio_lock);
err = rhashtable_insert_fast(&hwsim_radios_rht, &data->rht,
hwsim_rht_params);
@@ -4715,6 +4773,7 @@ static int mac80211_hwsim_get_radio(struct sk_buff *skb,
param.regd = data->regd;
param.channels = data->channels;
param.hwname = wiphy_name(data->hw->wiphy);
+ param.pmsr_capa = &data->pmsr_capa;
res = append_radio_msg(skb, data->idx, ¶m);
if (res < 0)
@@ -5053,6 +5112,83 @@ static bool hwsim_known_ciphers(const u32 *ciphers, int n_ciphers)
return true;
}
+static int parse_ftm_capa(const struct nlattr *ftm_capa,
+ struct cfg80211_pmsr_capabilities *out)
+{
+ struct nlattr *tb[NL80211_PMSR_FTM_CAPA_ATTR_MAX + 1];
+ int ret = nla_parse_nested(tb, NL80211_PMSR_FTM_CAPA_ATTR_MAX,
+ ftm_capa, hwsim_ftm_capa_policy, NULL);
+ if (ret) {
+ pr_err("mac80211_hwsim: malformed FTM capability");
+ return -EINVAL;
+ }
+
+ out->ftm.supported = 1;
+ if (tb[NL80211_PMSR_FTM_CAPA_ATTR_PREAMBLES])
+ out->ftm.preambles =
+ nla_get_u32(tb[NL80211_PMSR_FTM_CAPA_ATTR_PREAMBLES]);
+ if (tb[NL80211_PMSR_FTM_CAPA_ATTR_BANDWIDTHS])
+ out->ftm.bandwidths =
+ nla_get_u32(tb[NL80211_PMSR_FTM_CAPA_ATTR_BANDWIDTHS]);
+ if (tb[NL80211_PMSR_FTM_CAPA_ATTR_MAX_BURSTS_EXPONENT])
+ out->ftm.max_bursts_exponent =
+ nla_get_u8(tb[NL80211_PMSR_FTM_CAPA_ATTR_MAX_BURSTS_EXPONENT]);
+ if (tb[NL80211_PMSR_FTM_CAPA_ATTR_MAX_FTMS_PER_BURST])
+ out->ftm.max_ftms_per_burst =
+ nla_get_u8(tb[NL80211_PMSR_FTM_CAPA_ATTR_MAX_FTMS_PER_BURST]);
+ out->ftm.asap =
+ !!tb[NL80211_PMSR_FTM_CAPA_ATTR_ASAP];
+ out->ftm.non_asap =
+ !!tb[NL80211_PMSR_FTM_CAPA_ATTR_NON_ASAP];
+ out->ftm.request_lci =
+ !!tb[NL80211_PMSR_FTM_CAPA_ATTR_REQ_LCI];
+ out->ftm.request_civicloc =
+ !!tb[NL80211_PMSR_FTM_CAPA_ATTR_REQ_CIVICLOC];
+ out->ftm.trigger_based =
+ !!tb[NL80211_PMSR_FTM_CAPA_ATTR_TRIGGER_BASED];
+ out->ftm.non_trigger_based =
+ !!tb[NL80211_PMSR_FTM_CAPA_ATTR_NON_TRIGGER_BASED];
+
+ return 0;
+}
+
+static int parse_pmsr_capa(const struct nlattr *pmsr_capa,
+ struct cfg80211_pmsr_capabilities *out)
+{
+ struct nlattr *tb[NL80211_PMSR_ATTR_MAX + 1];
+ struct nlattr *nla;
+ int size;
+ int ret = nla_parse_nested(tb, NL80211_PMSR_ATTR_MAX, pmsr_capa,
+ hwsim_pmsr_capa_policy, NULL);
+ if (ret) {
+ pr_err("mac80211_hwsim: malformed PMSR capability");
+ return -EINVAL;
+ }
+
+ if (tb[NL80211_PMSR_ATTR_MAX_PEERS])
+ out->max_peers =
+ nla_get_u32(tb[NL80211_PMSR_ATTR_MAX_PEERS]);
+ out->report_ap_tsf = !!tb[NL80211_PMSR_ATTR_REPORT_AP_TSF];
+ out->randomize_mac_addr =
+ !!tb[NL80211_PMSR_ATTR_RANDOMIZE_MAC_ADDR];
+
+ if (!tb[NL80211_PMSR_ATTR_TYPE_CAPA]) {
+ pr_err("mac80211_hwsim: malformed PMSR type");
+ return -EINVAL;
+ }
+
+ nla_for_each_nested(nla, tb[NL80211_PMSR_ATTR_TYPE_CAPA], size) {
+ switch (nla_type(nla)) {
+ case NL80211_PMSR_TYPE_FTM:
+ parse_ftm_capa(nla, out);
+ break;
+ default:
+ pr_warn("mac80211_hwsim: Unknown PMSR type\n");
+ }
+ }
+ return 0;
+}
+
static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
{
struct hwsim_new_radio_params param = { 0 };
@@ -5173,8 +5309,26 @@ static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
param.hwname = hwname;
}
+ if (info->attrs[HWSIM_ATTR_PMSR_SUPPORT]) {
+ struct cfg80211_pmsr_capabilities *pmsr_capa =
+ kmalloc(sizeof(struct cfg80211_pmsr_capabilities),
+ GFP_KERNEL);
+ if (!pmsr_capa) {
+ ret = -ENOMEM;
+ goto out_free;
+ }
+ ret = parse_pmsr_capa(info->attrs[HWSIM_ATTR_PMSR_SUPPORT],
+ pmsr_capa);
+ if (ret)
+ goto out_free;
+ param.pmsr_capa = pmsr_capa;
+ }
+
ret = mac80211_hwsim_new_radio(info, ¶m);
+
+out_free:
kfree(hwname);
+ kfree(param.pmsr_capa);
return ret;
}
@@ -5419,7 +5573,6 @@ static struct notifier_block hwsim_netlink_notifier = {
static int __init hwsim_init_netlink(void)
{
int rc;
-
printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
rc = genl_register_family(&hwsim_genl_family);
diff --git a/drivers/net/wireless/mac80211_hwsim.h b/drivers/net/wireless/mac80211_hwsim.h
index 527799b2de0f..81cd02d2555c 100644
--- a/drivers/net/wireless/mac80211_hwsim.h
+++ b/drivers/net/wireless/mac80211_hwsim.h
@@ -142,6 +142,7 @@ enum {
* @HWSIM_ATTR_CIPHER_SUPPORT: u32 array of supported cipher types
* @HWSIM_ATTR_MLO_SUPPORT: claim MLO support (exact parameters TBD) for
* the new radio
+ * @HWSIM_ATTR_PMSR_SUPPORT: claim peer measurement support
* @__HWSIM_ATTR_MAX: enum limit
*/
@@ -173,6 +174,7 @@ enum {
HWSIM_ATTR_IFTYPE_SUPPORT,
HWSIM_ATTR_CIPHER_SUPPORT,
HWSIM_ATTR_MLO_SUPPORT,
+ HWSIM_ATTR_PMSR_SUPPORT,
__HWSIM_ATTR_MAX,
};
#define HWSIM_ATTR_MAX (__HWSIM_ATTR_MAX - 1)
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 03d4f4deadae..33f775b0f0b0 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -8751,6 +8751,16 @@ void cfg80211_pmsr_complete(struct wireless_dev *wdev,
struct cfg80211_pmsr_request *req,
gfp_t gfp);
+/**
+ * cfg80211_send_pmsr_capa - send the pmsr capabilities.
+ * @cap: peer measurement capabilities
+ * @skb: The skb to send pmsr capa
+ *
+ * Send the peer measurement capabilities to skb.
+ */
+int cfg80211_send_pmsr_capa(const struct cfg80211_pmsr_capabilities *cap,
+ struct sk_buff *msg);
+
/**
* cfg80211_iftype_allowed - check whether the interface can be allowed
* @wiphy: the wiphy
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 33a82ecab9d5..b972a2135654 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -2152,10 +2152,9 @@ nl80211_send_pmsr_ftm_capa(const struct cfg80211_pmsr_capabilities *cap,
return 0;
}
-static int nl80211_send_pmsr_capa(struct cfg80211_registered_device *rdev,
- struct sk_buff *msg)
+int cfg80211_send_pmsr_capa(const struct cfg80211_pmsr_capabilities *cap,
+ struct sk_buff *msg)
{
- const struct cfg80211_pmsr_capabilities *cap = rdev->wiphy.pmsr_capa;
struct nlattr *pmsr, *caps;
if (!cap)
@@ -2193,6 +2192,13 @@ static int nl80211_send_pmsr_capa(struct cfg80211_registered_device *rdev,
return 0;
}
+EXPORT_SYMBOL_GPL(cfg80211_send_pmsr_capa);
+
+static int nl80211_send_pmsr_capa(struct cfg80211_registered_device *rdev,
+ struct sk_buff *msg)
+{
+ return cfg80211_send_pmsr_capa(rdev->wiphy.pmsr_capa, msg);
+}
static int
nl80211_put_iftype_akm_suites(struct cfg80211_registered_device *rdev,
@@ -3181,8 +3187,11 @@ int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
struct nlattr **attrs = info->attrs;
u32 control_freq;
- if (!attrs[NL80211_ATTR_WIPHY_FREQ])
+ if (!attrs[NL80211_ATTR_WIPHY_FREQ]) {
+ NL_SET_ERR_MSG_ATTR(extack, attrs[NL80211_ATTR_WIPHY_FREQ],
+ "Frequency is missing");
return -EINVAL;
+ }
control_freq = MHZ_TO_KHZ(
nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
--
2.39.0.246.g2a6d74b583-goog
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