qcacld-3.0: Add a sysfs replacement for getTdlsPeers

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

This feature can be controlled using configuration flag
CONFIG_WLAN_GET_TDLS_PEERS

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

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

Change-Id: I66123266d6a3bf4c5c82f70186e35aa9942533b1
CRs-Fixed: 2681810

Kbuild

@@ -309,6 +309,9 @@ endif
 ifeq ($(CONFIG_WLAN_GET_RANGE_EXT), y)
 HDD_OBJS += $(HDD_SRC_DIR)/wlan_hdd_sysfs_get_range_ext.o
 endif
+ifeq ($(CONFIG_WLAN_GET_TDLS_PEERS), y)
+HDD_OBJS += $(HDD_SRC_DIR)/wlan_hdd_sysfs_get_tdls_peers.o
+endif
 endif
 
 ifeq ($(CONFIG_QCACLD_FEATURE_FW_STATE), y)
@@ -2578,6 +2581,7 @@ endif
 
 #normally, TDLS negative behavior is not needed
 cppflags-$(CONFIG_QCOM_TDLS) += -DFEATURE_WLAN_TDLS
+cppflags-$(CONFIG_WLAN_GET_TDLS_PEERS) += -DWLAN_GET_TDLS_PEERS
 
 cppflags-$(CONFIG_QCACLD_WLAN_LFR3) += -DWLAN_FEATURE_ROAM_OFFLOAD
 

configs/default_defconfig

@@ -189,6 +189,9 @@ ifeq ($(CONFIG_WLAN_SYSFS), y)
 	CONFIG_WLAN_TXRX_STATS := y
 	CONFIG_WLAN_SET_DP_TRACE := y
 	CONFIG_WLAN_GET_RANGE_EXT := y
+ifeq ($(CONFIG_QCOM_TDLS), y)
+	CONFIG_WLAN_GET_TDLS_PEERS := y
+endif
 endif
 
 CONFIG_WLAN_POWER_DEBUG := y

core/hdd/inc/wlan_hdd_sysfs_get_tdls_peers.h

@@ -0,0 +1,63 @@
+/*
+ * 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_tdls_peers.h
+ *
+ * implementation for creating sysfs file get TDLS peers
+ */
+
+#ifndef _WLAN_HDD_SYSFS_GET_TDLS_PEERS_H
+#define _WLAN_HDD_SYSFS_GET_TDLS_PEERS_H
+
+#if defined(WLAN_SYSFS) && defined(WLAN_GET_TDLS_PEERS)
+/**
+ * hdd_sysfs_get_tdls_peers_interface_create() - API to create get_tdls_peers
+ * sysfs interface
+ * @adapter: pointer to adapter
+ *
+ * this file is created per adapter.
+ * file path: /sys/class/net/wlanxx/get_tdls_peers
+ *	where wlanxx is adapter name
+ *
+ * usage:
+ *      cat /sys/class/net/wlanxx/get_tdls_peers
+ *
+ * Return: none
+ */
+void hdd_sysfs_get_tdls_peers_interface_create(struct hdd_adapter *adapter);
+
+/**
+ * hdd_sysfs_get_tdls_peers_interface_destroy() - API to destroy get_tdls_peers
+ * sysfs interface
+ * @adapter: pointer to adapter
+ *
+ * Return: none
+ */
+void hdd_sysfs_get_tdls_peers_interface_destroy(struct hdd_adapter *adapter);
+
+#else
+static inline
+void hdd_sysfs_get_tdls_peers_interface_create(struct hdd_adapter *adapter)
+{
+}
+
+static inline
+void hdd_sysfs_get_tdls_peers_interface_destroy(struct hdd_adapter *adapter)
+{
+}
+#endif
+#endif /* #ifndef _WLAN_HDD_SYSFS_GET_TDLS_PEERS_H */

core/hdd/src/wlan_hdd_sysfs.c

@@ -55,6 +55,7 @@
 #include <wlan_hdd_sysfs_txrx_stats.h>
 #include <wlan_hdd_sysfs_set_dp_trace.h>
 #include <wlan_hdd_sysfs_get_range_ext.h>
+#include <wlan_hdd_sysfs_get_tdls_peers.h>
 
 #define MAX_PSOC_ID_SIZE 10
 
@@ -637,11 +638,13 @@ hdd_sysfs_create_sta_adapter_root_obj(struct hdd_adapter *adapter)
 	hdd_sysfs_txrx_fw_stats_create(adapter);
 	hdd_sysfs_txrx_stats_create(adapter);
 	hdd_sysfs_get_range_ext_create(adapter);
+	hdd_sysfs_get_tdls_peers_interface_create(adapter);
 }
 
 static void
 hdd_sysfs_destroy_sta_adapter_root_obj(struct hdd_adapter *adapter)
 {
+	hdd_sysfs_get_tdls_peers_interface_destroy(adapter);
 	hdd_sysfs_get_range_ext_destroy(adapter);
 	hdd_sysfs_txrx_stats_destroy(adapter);
 	hdd_sysfs_txrx_fw_stats_destroy(adapter);

core/hdd/src/wlan_hdd_sysfs_get_tdls_peers.c

@@ -0,0 +1,118 @@
+/*
+ * 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_tdls_peers.c
+ *
+ * implementation for creating sysfs file get_tdls_peers
+ */
+
+#include <wlan_hdd_includes.h>
+#include "osif_vdev_sync.h"
+#include "wlan_hdd_object_manager.h"
+#include "wlan_hdd_sysfs_get_tdls_peers.h"
+
+/**
+ * __show_tdls_all_peers() - dump all TDLS peer info into output string
+ * @net_dev: net device
+ * @buf: output string buffer to hold the peer info
+ *
+ * Return: The size (in bytes) of the valid peer info in the output buffer
+ */
+static int __show_tdls_all_peers(struct net_device *net_dev, char *buf)
+{
+	struct hdd_adapter *adapter = netdev_priv(net_dev);
+	struct hdd_context *hdd_ctx;
+	struct wlan_objmgr_vdev *vdev;
+	int ret_val;
+
+	hdd_enter_dev(net_dev);
+
+	ret_val = scnprintf(buf, PAGE_SIZE, "%s     getTdlsPeers:",
+			    net_dev->name);
+
+	if (hdd_validate_adapter(adapter)) {
+		ret_val += scnprintf(buf + ret_val, PAGE_SIZE - ret_val,
+				     "\nHDD adapter is not valid\n");
+		goto exit;
+	}
+
+	hdd_ctx = WLAN_HDD_GET_CTX(adapter);
+	if (0 != (wlan_hdd_validate_context(hdd_ctx))) {
+		ret_val += scnprintf(buf + ret_val, PAGE_SIZE - ret_val,
+				     "\nHDD context is not valid\n");
+		goto exit;
+	}
+
+	if ((QDF_STA_MODE != adapter->device_mode) &&
+	    (QDF_P2P_CLIENT_MODE != adapter->device_mode)) {
+		ret_val += scnprintf(buf + ret_val, PAGE_SIZE - ret_val,
+				     "\nNo TDLS support for this adapter\n");
+		goto exit;
+	}
+
+	vdev = hdd_objmgr_get_vdev(adapter);
+	if (!vdev) {
+		ret_val += scnprintf(buf + ret_val, PAGE_SIZE - ret_val,
+				     "\nVDEV is NULL\n");
+		goto exit;
+	}
+	ret_val += wlan_cfg80211_tdls_get_all_peers(vdev, buf + ret_val,
+						    PAGE_SIZE - ret_val);
+	hdd_objmgr_put_vdev(vdev);
+
+exit:
+	if ((PAGE_SIZE - ret_val) > 0)
+		ret_val += scnprintf(buf + ret_val, PAGE_SIZE - ret_val, "\n");
+
+	hdd_exit();
+	return ret_val;
+}
+
+static ssize_t show_tdls_all_peers(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_tdls_all_peers(net_dev, buf);
+
+	osif_vdev_sync_op_stop(vdev_sync);
+
+	return err_size;
+}
+
+static DEVICE_ATTR(get_tdls_peers, 0444, show_tdls_all_peers, NULL);
+
+void hdd_sysfs_get_tdls_peers_interface_create(struct hdd_adapter *adapter)
+{
+	int error;
+
+	error = device_create_file(&adapter->dev->dev,
+				   &dev_attr_get_tdls_peers);
+	if (error)
+		hdd_err("could not create get_tdls_peers sysfs file");
+}
+
+void hdd_sysfs_get_tdls_peers_interface_destroy(struct hdd_adapter *adapter)
+{
+	device_remove_file(&adapter->dev->dev, &dev_attr_get_tdls_peers);
+}