STP: Fix: Build and docker updates to bring up the STP service

Did the following changes for docker-stp
* Updated the apt-get path to install nftables instead of ebtables
  since the functionality needed from ebtables in STP docker is not
  supported anymore
* Updated the supervisord.conf to the current format.

Did the following build changes
* Updated init_cfg.json.j2 to disable STP feature on start when the
  build includes this feature
* Updated stp.service.j2 to use config-setup.service instead of
  currently unsupported updategraph.service
* Added entries for STP in copp_cfg.j2 to punt the packet to control
  plane.

Signed-off-by: Ram Hegde <rhegde@marvell.com>

Author: rdhegde

dockers/docker-stp/Dockerfile.j2

@@ -14,9 +14,9 @@ RUN apt-get update      && \
         libdbus-1-3        \
         libdaemon0         \
         libjansson4        \
-        libpython3.11      \
-        libjemalloc2        \
-        ebtables
+        libpython3.13      \
+        libjemalloc2       \
+        nftables
 
 {% if docker_stp_debs.strip() -%}
 # Copy locally-built Debian package dependencies

dockers/docker-stp/supervisord.conf

@@ -8,29 +8,37 @@ command=/usr/bin/start.sh
 priority=1
 autostart=true
 autorestart=false
-stdout_logfile=syslog
-stderr_logfile=syslog
+stdout_logfile=NONE
+stdout_syslog=true
+stderr_logfile=NONE
+stderr_syslog=true
 
 [program:rsyslogd]
 command=/usr/sbin/rsyslogd -n
 priority=2
 autostart=false
 autorestart=false
-stdout_logfile=syslog
-stderr_logfile=syslog
+stdout_logfile=NONE
+stdout_syslog=true
+stderr_logfile=NONE
+stderr_syslog=true
 
 [program:stpd]
 command=/usr/bin/stpd
 priority=3
 autostart=false
 autorestart=false
-stdout_logfile=syslog
-stderr_logfile=syslog
+stdout_logfile=NONE
+stdout_syslog=true
+stderr_logfile=NONE
+stderr_syslog=true
 
 [program:stpmgrd]
 command=/usr/bin/stpmgrd
 priority=3
 autostart=false
 autorestart=false
-stdout_logfile=syslog
-stderr_logfile=syslog
+stdout_logfile=NONE
+stdout_syslog=true
+stderr_logfile=NONE
+stderr_syslog=true

files/build_templates/init_cfg.json.j2

@@ -77,6 +77,7 @@
 {%- if include_dhcp_server == "y" %}{% do features.append(("dhcp_server", "disabled", false, "enabled")) %}{% endif %}
 {%- if sonic_asic_platform == "vs" %}{% do features.append(("gbsyncd", "enabled", false, "enabled")) %}{% endif %}
 {%- if include_iccpd == "y" %}{% do features.append(("iccpd", "disabled", false, "enabled")) %}{% endif %}
+{%- if include_stp == "y" %}{% do features.append(("stp", "disabled", false, "enabled")) %}{% endif %}
 {%- if include_mgmt_framework == "y" %}{% do features.append(("mgmt-framework", "enabled", true, "enabled")) %}{% endif %}
 {%- if include_mux == "y" %}{% do features.append(("mux", "{% if 'subtype' in DEVICE_METADATA['localhost'] and DEVICE_METADATA['localhost']['subtype'] == 'DualToR' %}enabled{% else %}always_disabled{% endif %}", false, "enabled")) %}{% endif %}
 {%- if include_nat == "y" %}{% do features.append(("nat", "disabled", false, "enabled")) %}{% endif %}

files/build_templates/stp.service.j2

@@ -1,7 +1,7 @@
 [Unit]
 Description=STP container
-Requires=updategraph.service swss.service
-After=updategraph.service swss.service syncd.service
+Requires=config-setup.service swss.service
+After=config-setup.service swss.service syncd.service
 Before=ntp-config.service
 BindsTo=sonic.target
 After=sonic.target

files/image_config/copp/copp_cfg.j2

@@ -106,6 +106,10 @@
 		    "trap_ids": "lldp",
 		    "trap_group": "queue4_group3"
 	    },
+	    "stp": {
+		    "trap_ids": "stp,pvrst",
+		    "trap_group": "queue4_group3"
+	    },
 	    "dhcp_relay": {
 		    "trap_ids": "dhcp,dhcpv6",
 		    "trap_group": "queue4_group3"

marvell-docs/SONIC/releases/release-notes.md

@@ -14,7 +14,11 @@
 
 ## New Features
 
-*(None yet.)*
+- **PVST support** — PVST is now fully functional:
+  - **`src/sonic-stp`:** correct VLAN for untagged PVST BPDUs, consistent IPC struct packing, and interface/socket error handling.
+  - **`src/sonic-swss`:** ebtables→nft filtering for PVST, `proto_mode` in `STP_IPC_MSG`, and stpmgr fixes.
+  - **`src/sonic-utilities`:** correct STP table name and mode keyword in CLI handlers, plus added test coverage.
+  - **`sonic-buildimage`:** build/docker updates to bring up the STP service.
 
 ## Known Issues