[sflow]: Unblocked psample_*() function calls in BRCM ESW platforms for proper functionality of sflow feature (#12918)

*Replaced BRCM SDK's psample support flag(PSAMPLE_SUPPORT) with linux kernel psample module support config flag(CONFIG_PSAMPLE) in saibcm-modules.
*Replaced BUILD_PSAMPLE conditioanl check with CONFIG_PSAMPLE to build psample callback library(psample-cb.o), only if psample config is enabled in linux kernel.
*Cleaned up PSAMPLE_SUPPORT related commented code.

Signed-off-by: [email protected]

Signed-off-by: [email protected]

Author: hari-selvam

platform/broadcom/saibcm-modules/sdklt/linux/knetcb/Kbuild

@@ -17,8 +17,7 @@
 # A copy of the GNU General Public License version 2 (GPLv2) can
 # be found in the LICENSES folder.$
 #
-ifeq ($(BUILD_PSAMPLE),1)
-PSAMPLE_CFLAGS=-DPSAMPLE_SUPPORT
+ifneq ($(CONFIG_PSAMPLE),)
 PSAMPLE_CB_OBJS=psample-cb.o
 endif
 

platform/broadcom/saibcm-modules/sdklt/linux/knetcb/ngknetcb_main.c

@@ -307,8 +307,8 @@ static struct sk_buff *
 ngknet_rx_cb(struct sk_buff *skb)
 {
     skb = strip_tag_rx_cb(skb);
-#ifdef PSAMPLE_SUPPORT
-    skb = psample_rx_cb(skb); 
+#if IS_ENABLED(CONFIG_PSAMPLE)
+    skb = psample_rx_cb(skb);
 #endif
     return skb;
 }
@@ -324,7 +324,7 @@ static int
 ngknet_netif_create_cb(struct net_device *dev)
 {
     int retv = 0;
-#ifdef PSAMPLE_SUPPORT
+#if IS_ENABLED(CONFIG_PSAMPLE)
     retv = psample_netif_create_cb(dev); 
 #endif
     return retv;
@@ -334,7 +334,7 @@ static int
 ngknet_netif_destroy_cb(struct net_device *dev)
 {
     int retv = 0;
-#ifdef PSAMPLE_SUPPORT
+#if IS_ENABLED(CONFIG_PSAMPLE)
     retv = psample_netif_destroy_cb(dev); 
 #endif
     return retv;
@@ -431,7 +431,7 @@ ngknetcb_init_module(void)
     ngknet_rx_cb_register(ngknet_rx_cb);
     ngknet_tx_cb_register(ngknet_tx_cb);
 
-#ifdef PSAMPLE_SUPPORT
+#if IS_ENABLED(CONFIG_PSAMPLE)
     psample_init();
 #endif
 
@@ -446,7 +446,7 @@ ngknetcb_exit_module(void)
     ngknet_netif_create_cb_unregister(ngknet_netif_create_cb);
     ngknet_netif_destroy_cb_unregister(ngknet_netif_destroy_cb);
 
-#ifdef PSAMPLE_SUPPORT
+#if IS_ENABLED(CONFIG_PSAMPLE)
     psample_cleanup();
 #endif
 

platform/broadcom/saibcm-modules/sdklt/linux/knetcb/psample-cb.h

@@ -24,7 +24,6 @@
 #include <lkm/lkm.h>
 #include <linux/netdevice.h>
 
-//#define PSAMPLE_SUPPORT 1  // TODO: MLI@BRCM - Add this as part of conditional in Makefile
 #define PSAMPLE_CB_NAME "psample"
 
 extern int

platform/broadcom/saibcm-modules/systems/linux/kernel/modules/knet-cb/knet-cb.c

@@ -46,7 +46,7 @@
 #include <linux/if_vlan.h>
 
 /* Enable sflow sampling using psample */
-#ifdef PSAMPLE_SUPPORT
+#if IS_ENABLED(CONFIG_PSAMPLE)
 #include "psample-cb.h"
 #endif
 
@@ -334,7 +334,7 @@ knet_filter_cb(uint8_t * pkt, int size, int dev_no, void *meta,
                      int chan, kcom_filter_t *kf)
 {
     /* check for filter callback handler */
-#ifdef PSAMPLE_SUPPORT
+#if IS_ENABLED(CONFIG_PSAMPLE)
     if (strncmp(kf->desc, PSAMPLE_CB_NAME, strlen(PSAMPLE_CB_NAME)) == 0) {
         return psample_filter_cb (pkt, size, dev_no, meta, chan, kf);
     }
@@ -346,7 +346,7 @@ static int
 knet_netif_create_cb(int unit, kcom_netif_t *netif, uint16 spa, struct net_device *dev)
 {
     int retv = 0;
-#ifdef PSAMPLE_SUPPORT
+#if IS_ENABLED(CONFIG_PSAMPLE)
     retv = psample_netif_create_cb(unit, netif, spa, dev);
 #endif
     return retv;
@@ -356,7 +356,7 @@ static int
 knet_netif_destroy_cb(int unit, kcom_netif_t *netif, uint16 spa, struct net_device *dev)
 {
     int retv = 0;
-#ifdef PSAMPLE_SUPPORT
+#if IS_ENABLED(CONFIG_PSAMPLE)
     retv = psample_netif_destroy_cb(unit, netif, spa, dev);
 #endif
     return retv;
@@ -367,7 +367,7 @@ knet_filter_cb(uint8_t * pkt, int size, int dev_no, void *meta,
                      int chan, kcom_filter_t *kf)
 {
     /* check for filter callback handler */
-#ifdef PSAMPLE_SUPPORT
+#if IS_ENABLED(CONFIG_PSAMPLE)
     if (strncmp(kf->desc, PSAMPLE_CB_NAME, KCOM_FILTER_DESC_MAX) == 0) {
         return psample_filter_cb (pkt, size, dev_no, meta, chan, kf);
     }
@@ -379,7 +379,7 @@ static int
 knet_netif_create_cb(int unit, kcom_netif_t *netif, struct net_device *dev)
 {
     int retv = 0;
-#ifdef PSAMPLE_SUPPORT
+#if IS_ENABLED(CONFIG_PSAMPLE)
     retv = psample_netif_create_cb(unit, netif, dev);
 #endif
     return retv;
@@ -389,7 +389,7 @@ static int
 knet_netif_destroy_cb(int unit, kcom_netif_t *netif, struct net_device *dev)
 {
     int retv = 0;
-#ifdef PSAMPLE_SUPPORT
+#if IS_ENABLED(CONFIG_PSAMPLE)
     retv = psample_netif_destroy_cb(unit, netif, dev);
 #endif
     return retv;
@@ -427,7 +427,7 @@ _cleanup(void)
     bkn_netif_create_cb_unregister(knet_netif_create_cb);
     bkn_netif_destroy_cb_unregister(knet_netif_destroy_cb);
 
-#ifdef PSAMPLE_SUPPORT
+#if IS_ENABLED(CONFIG_PSAMPLE)
     psample_cleanup();
 #endif
     return 0;
@@ -445,7 +445,7 @@ _init(void)
         bkn_tx_skb_cb_register(strip_tag_tx_cb);
     }
 
-#ifdef PSAMPLE_SUPPORT
+#if IS_ENABLED(CONFIG_PSAMPLE)
     psample_init();
 #endif
     bkn_filter_cb_register(knet_filter_cb);