qcacld-3.0: Add a sysfs replacement for get_sta_info

As part of WEXT replacement, replace get_sta_info with a sysfs file.

This feature can be controlled using configuration flag
CONFIG_WLAN_SYSFS_GET_STA_INFO

file path: /sys/class/net/wlanxx/get_sta_info
	where wlanxx is adapter name

example command: cat /sys/class/net/wlanxx/get_tdls_peers

Change-Id: Iac23cdc92a860279480ec9703697f22b2f0b5223
CRs-Fixed: 2682163

Kbuild

@@ -265,6 +265,9 @@ endif
 ifeq ($(CONFIG_WLAN_REASSOC), y)
 HDD_OBJS += $(HDD_SRC_DIR)/wlan_hdd_sysfs_reassoc.o
 endif
+ifeq ($(CONFIG_WLAN_SYSFS_GET_STA_INFO), y)
+HDD_OBJS += $(HDD_SRC_DIR)/wlan_hdd_sysfs_get_sta_info.o
+endif
 ifeq ($(CONFIG_WLAN_DEBUG_CRASH_INJECT), y)
 HDD_OBJS += $(HDD_SRC_DIR)/wlan_hdd_sysfs_crash_inject.o
 endif
@@ -2519,6 +2522,8 @@ cppflags-$(CONFIG_WLAN_WOWL_ADD_PTRN) += -DCONFIG_WLAN_WOWL_ADD_PTRN
 cppflags-$(CONFIG_FEATURE_UNIT_TEST_SUSPEND) += -DWLAN_SUSPEND_RESUME_TEST
 cppflags-$(CONFIG_FEATURE_WLM_STATS) += -DFEATURE_WLM_STATS
 
+cppflags-$(CONFIG_WLAN_SYSFS_GET_STA_INFO) += -DWLAN_SYSFS_GET_STA_INFO
+
 ifeq ($(CONFIG_LEAK_DETECTION), y)
 cppflags-y += \
 	-DCONFIG_HALT_KMEMLEAK \

configs/default_defconfig

@@ -175,6 +175,7 @@ CONFIG_QCOM_TDLS := y
 CONFIG_WLAN_SYSFS := y
 
 ifeq ($(CONFIG_WLAN_SYSFS), y)
+	CONFIG_WLAN_SYSFS_GET_STA_INFO := y
 	CONFIG_WLAN_SET_FW_MODE_CFG := y
 	CONFIG_WLAN_REASSOC := y
 	CONFIG_WLAN_SYSFS_CONNECT_INFO := y

core/hdd/inc/wlan_hdd_sysfs_get_sta_info.h

@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2020, The Linux Foundation. All rights reserved.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/**
+ * DOC: wlan_hdd_sysfs_get_sta_info.h
+ *
+ * implementation for creating sysfs file get_sta_info
+ */
+
+#ifndef _WLAN_HDD_SYSFS_GET_STA_INFO_H
+#define _WLAN_HDD_SYSFS_GET_STA_INFO_H
+
+#if defined(WLAN_SYSFS) && defined(WLAN_SYSFS_GET_STA_INFO)
+/**
+ * hdd_sysfs_get_sta_info_interface_create() - API to create get_sta_info sysfs
+ * interface
+ * @adapter: pointer to adapter
+ *
+ * this file is created for SAP adapter.
+ * file path: /sys/class/net/wlanxx/get_sta_info
+ *	where wlanxx is adapter name
+ *
+ * usage:
+ *      cat /sys/class/net/wlanxx/get_sta_info
+ *
+ * Return: none
+ */
+void hdd_sysfs_get_sta_info_interface_create(struct hdd_adapter *adapter);
+
+/**
+ * hdd_sysfs_get_sta_info_interface_destroy() - API to destroy get_sta_info
+ * @adapter: pointer to adapter
+ *
+ * Return: none
+ */
+void hdd_sysfs_get_sta_info_interface_destroy(struct hdd_adapter *adapter);
+
+#else
+static inline
+void hdd_sysfs_get_sta_info_interface_create(struct hdd_adapter *adapter)
+{
+}
+
+static inline
+void hdd_sysfs_get_sta_info_interface_destroy(struct hdd_adapter *adapter)
+{
+}
+#endif
+#endif /* #ifndef _WLAN_HDD_SYSFS_GET_STA_INFO_H */

core/hdd/src/wlan_hdd_sysfs.c

@@ -37,6 +37,7 @@
 #include <sir_api.h>
 #endif
 #include "osif_sync.h"
+#include "wlan_hdd_sysfs_get_sta_info.h"
 #include <wlan_hdd_sysfs_set_fw_mode_cfg.h>
 #include <wlan_hdd_sysfs_reassoc.h>
 #include "wlan_hdd_sysfs_crash_inject.h"
@@ -617,6 +618,7 @@ static void hdd_sysfs_destroy_bcn_reception_interface(struct hdd_adapter
 static void
 hdd_sysfs_create_sta_adapter_root_obj(struct hdd_adapter *adapter)
 {
+	hdd_sysfs_get_sta_info_interface_create(adapter);
 	hdd_sysfs_create_bcn_reception_interface(adapter);
 	hdd_sysfs_reassoc_create(adapter);
 	hdd_sysfs_crash_inject_create(adapter);
@@ -638,11 +640,13 @@ hdd_sysfs_destroy_sta_adapter_root_obj(struct hdd_adapter *adapter)
 	hdd_sysfs_crash_inject_destroy(adapter);
 	hdd_sysfs_reassoc_destroy(adapter);
 	hdd_sysfs_destroy_bcn_reception_interface(adapter);
+	hdd_sysfs_get_sta_info_interface_destroy(adapter);
 }
 
 static void
 hdd_sysfs_create_sap_adapter_root_obj(struct hdd_adapter *adapter)
 {
+	hdd_sysfs_get_sta_info_interface_create(adapter);
 	hdd_sysfs_crash_inject_create(adapter);
 	hdd_sysfs_suspend_create(adapter);
 	hdd_sysfs_resume_create(adapter);
@@ -660,6 +664,7 @@ hdd_sysfs_destroy_sap_adapter_root_obj(struct hdd_adapter *adapter)
 	hdd_sysfs_resume_destroy(adapter);
 	hdd_sysfs_suspend_destroy(adapter);
 	hdd_sysfs_crash_inject_destroy(adapter);
+	hdd_sysfs_get_sta_info_interface_destroy(adapter);
 }
 
 void hdd_create_sysfs_files(struct hdd_context *hdd_ctx)

core/hdd/src/wlan_hdd_sysfs_get_sta_info.c

@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2020, The Linux Foundation. All rights reserved.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/**
+ * DOC: wlan_hdd_sysfs_get_sta_info.c
+ *
+ * implementation for creating sysfs file get_sta_info
+ */
+
+#include <wlan_hdd_includes.h>
+#include "osif_vdev_sync.h"
+#include "wlan_hdd_sysfs_get_sta_info.h"
+
+static ssize_t __show_sta_info(struct net_device *net_dev, char *buf)
+{
+	struct hdd_adapter *adapter = netdev_priv(net_dev);
+	struct hdd_context *hdd_ctx;
+	struct hdd_station_info *sta;
+	int ret_val;
+
+	hdd_enter_dev(net_dev);
+
+	ret_val = hdd_validate_adapter(adapter);
+	if (0 != ret_val)
+		goto exit;
+
+	if (adapter->device_mode != QDF_SAP_MODE)
+		goto exit;
+
+	hdd_ctx = WLAN_HDD_GET_CTX(adapter);
+	ret_val = wlan_hdd_validate_context(hdd_ctx);
+	if (0 != ret_val)
+		goto exit;
+
+	ret_val = scnprintf(buf, PAGE_SIZE,
+			    "%s    get_sta_info:\nstaAddress\n",
+			    net_dev->name);
+
+	hdd_for_each_sta_ref(adapter->sta_info_list, sta) {
+		if (QDF_IS_ADDR_BROADCAST(sta->sta_mac.bytes)) {
+			hdd_put_sta_info_ref(&adapter->sta_info_list, &sta,
+					     true);
+			continue;
+		}
+		ret_val += scnprintf(buf + ret_val, PAGE_SIZE - ret_val,
+				     QDF_MAC_ADDR_STR " ecsa=%d\n",
+				     sta->sta_mac.bytes[0],
+				     sta->sta_mac.bytes[1],
+				     sta->sta_mac.bytes[2],
+				     sta->sta_mac.bytes[3],
+				     sta->sta_mac.bytes[4],
+				     sta->sta_mac.bytes[5],
+				     sta->ecsa_capable);
+
+		hdd_put_sta_info_ref(&adapter->sta_info_list, &sta, true);
+	}
+
+exit:
+	hdd_exit();
+	return ret_val;
+}
+
+static ssize_t show_sta_info(struct device *dev,
+			     struct device_attribute *attr,
+			     char *buf)
+{
+	struct net_device *net_dev = container_of(dev, struct net_device, dev);
+	struct osif_vdev_sync *vdev_sync;
+	ssize_t err_size;
+
+	err_size = osif_vdev_sync_op_start(net_dev, &vdev_sync);
+	if (err_size)
+		return err_size;
+
+	err_size = __show_sta_info(net_dev, buf);
+
+	osif_vdev_sync_op_stop(vdev_sync);
+
+	return err_size;
+}
+
+static DEVICE_ATTR(get_sta_info, 0444, show_sta_info, NULL);
+
+void hdd_sysfs_get_sta_info_interface_create(struct hdd_adapter *adapter)
+{
+	int error;
+
+	error = device_create_file(&adapter->dev->dev, &dev_attr_get_sta_info);
+	if (error)
+		hdd_err("Could not create get_sta_info sysfs file");
+}
+
+void hdd_sysfs_get_sta_info_interface_destroy(struct hdd_adapter *adapter)
+{
+	device_remove_file(&adapter->dev->dev, &dev_attr_get_sta_info);
+}