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cfg80211: Add support to notify station's opmode change to userspace

ht/vht action frames will be sent to AP from station to notify change of its ht/vht opmode(max bandwidth, smps mode or nss) modified values. Currently these valuse used by driver/firmware for rate control algorithm. This patch introduces NL80211_CMD_STA_OPMODE_CHANGED command to notify those modified/current supported values(max bandwidth, smps mode, max nss) to userspace application. This will be useful for the application like steering, which closely monitoring station's capability changes. Since the application has taken these values during station association.

tamizhr@codeaurora.org committed 8 years ago

Commit 466b9931 parent 25b0ba73 files · +110 −0Browse files

Unified · Split

3 files
  1. include/net/cfg80211.h +43 −0
  2. include/uapi/linux/nl80211.h +12 −0
  3. net/wireless/nl80211.c +55 −0
include/net/cfg80211.h+43−0
@@ -3553,6 +3553,35 @@ enum wiphy_vendor_command_flags { · 3552 unmodified lines
35533553 WIPHY_VENDOR_CMD_NEED_RUNNING = BIT(2),
35543554 };
35553555
3556+/**
3557+ * enum wiphy_opmode_flag - Station's ht/vht operation mode information flags
3558+ *
3559+ * @STA_OPMODE_MAX_BW_CHANGED: Max Bandwidth changed
3560+ * @STA_OPMODE_SMPS_MODE_CHANGED: SMPS mode changed
3561+ * @STA_OPMODE_N_SS_CHANGED: max N_SS (number of spatial streams) changed
3562+ *
3563+ */
3564+enum wiphy_opmode_flag {
3565+ STA_OPMODE_MAX_BW_CHANGED = BIT(0),
3566+ STA_OPMODE_SMPS_MODE_CHANGED = BIT(1),
3567+ STA_OPMODE_N_SS_CHANGED = BIT(2),
3568+};
3569+
3570+/**
3571+ * struct sta_opmode_info - Station's ht/vht operation mode information
3572+ * @changed: contains value from &enum wiphy_opmode_flag
3573+ * @smps_mode: New SMPS mode of a station
3574+ * @bw: new max bandwidth value of a station
3575+ * @rx_nss: new rx_nss value of a station
3576+ */
3577+
3578+struct sta_opmode_info {
3579+ u32 changed;
3580+ u8 smps_mode;
3581+ u8 bw;
3582+ u8 rx_nss;
3583+};
3584+
35563585 /**
35573586 * struct wiphy_vendor_command - vendor command definition
35583587 * @info: vendor command identifying information, as used in nl80211
@@ -5721,6 +5750,20 @@ void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp); · 2162 unmodified lines
57215750 void cfg80211_radar_event(struct wiphy *wiphy,
57225751 struct cfg80211_chan_def *chandef, gfp_t gfp);
57235752
5753+/**
5754+ * cfg80211_sta_opmode_change_notify - STA's ht/vht operation mode change event
5755+ * @dev: network device
5756+ * @mac: MAC address of a station which opmode got modified
5757+ * @sta_opmode: station's current opmode value
5758+ * @gfp: context flags
5759+ *
5760+ * Driver should call this function when station's opmode modified via action
5761+ * frame.
5762+ */
5763+void cfg80211_sta_opmode_change_notify(struct net_device *dev, const u8 *mac,
5764+ struct sta_opmode_info *sta_opmode,
5765+ gfp_t gfp);
5766+
57245767 /**
57255768 * cfg80211_cac_event - Channel availability check (CAC) event
57265769 * @netdev: network device
include/uapi/linux/nl80211.h+12−0
@@ -1013,6 +1013,11 @@ · 1012 unmodified lines
10131013 * user space through the connect result as the user space would have
10141014 * initiated the connection through the connect request.
10151015 *
1016+ * @NL80211_CMD_STA_OPMODE_CHANGED: An event that notify station's
1017+ * ht opmode or vht opmode changes using any of &NL80211_ATTR_SMPS_MODE,
1018+ * &NL80211_ATTR_CHANNEL_WIDTH,&NL80211_ATTR_NSS attributes with its
1019+ * address(specified in &NL80211_ATTR_MAC).
1020+ *
10161021 * @NL80211_CMD_MAX: highest used command number
10171022 * @__NL80211_CMD_AFTER_LAST: internal use
10181023 */
@@ -1221,6 +1226,8 @@ enum nl80211_commands { · 202 unmodified lines
12211226
12221227 NL80211_CMD_EXTERNAL_AUTH,
12231228
1229+ NL80211_CMD_STA_OPMODE_CHANGED,
1230+
12241231 /* add new commands above here */
12251232
12261233 /* used to define NL80211_CMD_MAX below */
@@ -2186,6 +2193,9 @@ enum nl80211_commands { · 959 unmodified lines
21862193 * authentication processing to user space if this capability is indicated
21872194 * in NL80211_CMD_CONNECT requests from the user space.
21882195 *
2196+ * @NL80211_ATTR_NSS: Station's New/updated RX_NSS value notified using this
2197+ * u8 attribute. This is used with %NL80211_CMD_STA_OPMODE_CHANGED.
2198+ *
21892199 * @NUM_NL80211_ATTR: total number of nl80211_attrs available
21902200 * @NL80211_ATTR_MAX: highest attribute number currently defined
21912201 * @__NL80211_ATTR_AFTER_LAST: internal use
@@ -2615,6 +2625,8 @@ enum nl80211_attrs { · 423 unmodified lines
26152625 NL80211_ATTR_EXTERNAL_AUTH_ACTION,
26162626 NL80211_ATTR_EXTERNAL_AUTH_SUPPORT,
26172627
2628+ NL80211_ATTR_NSS,
2629+
26182630 /* add attributes here, update the policy in nl80211.c */
26192631
26202632 __NL80211_ATTR_AFTER_LAST,
net/wireless/nl80211.c+55−0
@@ -14950,6 +14950,61 @@ nl80211_radar_notify(struct cfg80211_registered_device *rdev, · 14949 unmodified lines
1495014950 nlmsg_free(msg);
1495114951 }
1495214952
14953+void cfg80211_sta_opmode_change_notify(struct net_device *dev, const u8 *mac,
14954+ struct sta_opmode_info *sta_opmode,
14955+ gfp_t gfp)
14956+{
14957+ struct sk_buff *msg;
14958+ struct wireless_dev *wdev = dev->ieee80211_ptr;
14959+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
14960+ void *hdr;
14961+
14962+ if (WARN_ON(!mac))
14963+ return;
14964+
14965+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14966+ if (!msg)
14967+ return;
14968+
14969+ hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STA_OPMODE_CHANGED);
14970+ if (!hdr) {
14971+ nlmsg_free(msg);
14972+ return;
14973+ }
14974+
14975+ if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
14976+ goto nla_put_failure;
14977+
14978+ if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
14979+ goto nla_put_failure;
14980+
14981+ if (nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
14982+ goto nla_put_failure;
14983+
14984+ if ((sta_opmode->changed & STA_OPMODE_SMPS_MODE_CHANGED) &&
14985+ nla_put_u8(msg, NL80211_ATTR_SMPS_MODE, sta_opmode->smps_mode))
14986+ goto nla_put_failure;
14987+
14988+ if ((sta_opmode->changed & STA_OPMODE_MAX_BW_CHANGED) &&
14989+ nla_put_u8(msg, NL80211_ATTR_CHANNEL_WIDTH, sta_opmode->bw))
14990+ goto nla_put_failure;
14991+
14992+ if ((sta_opmode->changed & STA_OPMODE_N_SS_CHANGED) &&
14993+ nla_put_u8(msg, NL80211_ATTR_NSS, sta_opmode->rx_nss))
14994+ goto nla_put_failure;
14995+
14996+ genlmsg_end(msg, hdr);
14997+
14998+ genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14999+ NL80211_MCGRP_MLME, gfp);
15000+
15001+ return;
15002+
15003+nla_put_failure:
15004+ nlmsg_free(msg);
15005+}
15006+EXPORT_SYMBOL(cfg80211_sta_opmode_change_notify);
15007+
1495315008 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
1495415009 u64 cookie, bool acked, gfp_t gfp)
1495515010 {