Mesh relay configuration on proxy node causes assert at next startup

Question

Hi

I have had problems when trying to update the relay status of a server node in my mesh app which is a combination of the light switch server proxy and dfu examples (plus some other stuff).

I've gone back to the default light switch server prxoy example and found that the problem is already present in that application.

If I send a config server message to disable the server's relay capabilities, I will get an entry written in flash like this:

0072000 10100408 FFFF0001 01010002 00140100 7FFFFFFF

That looks OK. But once this entry is in the flash, the node will assert at startup. This seems to be because of the NRF_MESH_IRQ_PRIORITY_LOWEST / NRF_MESH_IRQ_PRIORITY_THREAD problem described in many other threads.

At startup the call stack will look like this:

bearer_event_in_correct_irq_priority()
timer_sch_abort()
advertiser_disable()
core_tx_adv_set()
core_tx_set()
mesh_config_backend_iterate_action()
mesh_config_backend_read_all()
mesh_config_load()
mesh_stack_init()
mesh_init()
initialize()
main()
start()

And this will assert in bearer_event_in_correct_irq_priority() because there was no active irq

    if (active_irq == HAL_IRQn_NONE)
    {
        return (m_irq_priority == NRF_MESH_IRQ_PRIORITY_THREAD || !hal_irq_is_enabled(EVENT_IRQn));
    }
    else
    {
        volatile uint32_t prio = NVIC_GetPriority(active_irq);
        return (prio == m_irq_priority || (prio > m_irq_priority && !hal_irq_is_enabled(EVENT_IRQn)));
    }

and m_irq_priority is set to NRF_MESH_IRQ_PRIORITY_LOWEST as specified in mesh_init()

If I change the priority in mesh_init() to NRF_MESH_IRQ_PRIORITY_THREAD, the startup will work OK, but as soon as I try connecting via the proxy I will get an assert in bearer_event_in_correct_irq_priority() because now the priority of SWI2_EGU2 is 7 while m_irq_priority is 15 (NRF_MESH_IRQ_PRIORITY_THREAD)

Can you help me with a suggestion how to solve this? I can't configure the relay status of my office mesh network until this is solved :-)

Thanks in advance,
P-O Håkansson

Bjørn Kvaale · Accepted Answer

I have reported this internally. I will get back to you when I hear more from the mesh developers. They have created a new flash system in v2.2.0, so maybe this could be a reason for this priority issue. 
 Update: The suggestion from R&D is to make a few changes in the mesh/stack/src/mesh_stack.c file. Below is the fixed & the original file:

Fullscreen 
 mesh_stack_fixed.c 
 Download 
 
 /* Copyright (c) 2010 - 2018, Nordic Semiconductor ASA
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form, except as embedded into a Nordic
 * Semiconductor ASA integrated circuit in a product or a software update for
 * such product, must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other
 * materials provided with the distribution.
 *
 * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * 4. This software, with or without modification, must only be used with a
 * Nordic Semiconductor ASA integrated circuit.
 *
 * 5. Any software provided in binary form under this license must not be reverse
 * engineered, decompiled, modified and/or disassembled.
 *
 * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "mesh_stack.h"
#include "nrf_mesh_events.h"
#include "access_config.h"
#include "flash_manager.h"
#include "device_state_manager.h"
#include "config_server.h"
#include "health_server.h"
#include "net_state.h"
#include "hal.h"
#include "mesh_config.h"
#include "mesh_config_backend_glue.h"

#if GATT_PROXY
#include "proxy.h"
#endif

#include "nrf_nvic.h"
#include "mesh_app_utils.h"

static health_server_t m_health_server;

static void device_reset(void)
{
 hal_device_reset(0);
}

uint32_t mesh_stack_init(const mesh_stack_init_params_t * p_init_params,
 bool * p_device_provisioned)
{
 uint32_t status;

if (p_init_params == NULL)
 {
 return NRF_ERROR_NULL;
 }

/* Initialize the mesh stack */
 status = nrf_mesh_init(&p_init_params->core);
 if (status != NRF_SUCCESS)
 {
 return status;
 }

/* Initialize the access layer */
 dsm_init();
 access_init();

/* Initialize the configuration server */
 status = config_server_init(p_init_params->models.config_server_cb);
 if (status != NRF_SUCCESS)
 {
 return status;
 }

/* Initialize the health server for the primary element */
 status = health_server_init(&m_health_server, 0, DEVICE_COMPANY_ID,
 p_init_params->models.health_server_attention_cb,
 p_init_params->models.p_health_server_selftest_array,
 p_init_params->models.health_server_num_selftests);
 if (status != NRF_SUCCESS)
 {
 return status;
 }

/* Give application opportunity to initialize application specific models */
 if (p_init_params->models.models_init_cb != NULL)
 {
 p_init_params->models.models_init_cb();
 }

uint8_t is_nested;
 ERROR_CHECK(sd_nvic_critical_region_enter(&is_nested));

/* Load configuration, and check if the device has already been provisioned */
 mesh_config_load();

(void) dsm_flash_config_load();
 (void) access_flash_config_load();

bool is_provisioned = mesh_stack_is_device_provisioned();

#if GATT_PROXY
 if (is_provisioned)
 {
 proxy_init();
 }
#endif

if (p_device_provisioned != NULL)
 {
 *p_device_provisioned = is_provisioned;
 }

ERROR_CHECK(sd_nvic_critical_region_exit(is_nested));

return NRF_SUCCESS;
}

uint32_t mesh_stack_start(void)
{
 /* If the device is provisioned, the proxy state is automatically recovered from flash when
 * mesh_config loads the configuration. */
 uint32_t status = nrf_mesh_enable();
#if GATT_PROXY
 if (status == NRF_SUCCESS &&
 mesh_stack_is_device_provisioned() &&
 proxy_is_enabled())
 {
 (void) proxy_start();
 }
#endif
 return status;
}

uint32_t mesh_stack_provisioning_data_store(const nrf_mesh_prov_provisioning_data_t * p_prov_data,
 const uint8_t * p_devkey)
{
 dsm_handle_t netkey_handle, devkey_handle;
 dsm_local_unicast_address_t local_address;
 local_address.address_start = p_prov_data->address;
 local_address.count = ACCESS_ELEMENT_COUNT;
 uint32_t status;

/* Store received provisioning data in the DSM */
 status = dsm_local_unicast_addresses_set(&local_address);
 if (status != NRF_SUCCESS)
 {
 return status;
 }
 status = dsm_subnet_add(p_prov_data->netkey_index, p_prov_data->netkey, &netkey_handle);
 if (status != NRF_SUCCESS)
 {
 return status;
 }
 status = dsm_devkey_add(p_prov_data->address, netkey_handle, p_devkey, &devkey_handle);
 if (status != NRF_SUCCESS)
 {
 return status;
 }

NRF_MESH_ERROR_CHECK(net_state_iv_index_set(p_prov_data->iv_index, p_prov_data->flags.iv_update));

/* Bind config server to the device key */
 status = config_server_bind(devkey_handle);
 if (status != NRF_SUCCESS)
 {
 return status;
 }

/* Store new config server binding. */
 access_flash_config_store();
 return status;
}

void mesh_stack_config_clear(void)
{
 access_clear();
 dsm_clear();
 net_state_reset();
}

bool mesh_stack_is_device_provisioned(void)
{
 dsm_local_unicast_address_t addr;
 dsm_local_unicast_addresses_get(&addr);
 return (addr.address_start != NRF_MESH_ADDR_UNASSIGNED);
}

#if PERSISTENT_STORAGE
static void mesh_evt_handler(const nrf_mesh_evt_t * p_evt)
{
 if (p_evt->type == NRF_MESH_EVT_FLASH_STABLE)
 {
 device_reset();
 }
}
void mesh_stack_device_reset(void)
{
 /* We have to do this elaborate dance to avoid nested
 * calls to bearer event. It should be possible to call this
 * function from within a bearer_event_process context.
 */
 if (flash_manager_is_stable())
 {
 device_reset();
 }
 else
 {
 static nrf_mesh_evt_handler_t s_evt_handler = {
 .evt_cb = mesh_evt_handler
 };

nrf_mesh_evt_handler_add(&s_evt_handler);
 }
}

#else

void mesh_stack_device_reset(void)
{
 device_reset();
}
#endif /* PERSISTENT_STORAGE */

uint32_t mesh_stack_persistence_flash_usage(const uint32_t ** pp_start, uint32_t * p_length)
{
 if (pp_start == NULL || p_length == NULL)
 {
 return NRF_ERROR_NULL;
 }

#if PERSISTENT_STORAGE
 mesh_config_backend_flash_usage_t mesh_config_usage;
 mesh_config_backend_flash_usage_get(&mesh_config_usage);
 if (mesh_config_usage.p_start != NULL)
 {
 *pp_start = mesh_config_usage.p_start;
 }
 else
 {
 /* If there's no mesh config present in flash, access holds the lowest flash area. */
 *pp_start = access_flash_area_get();
 }
 *p_length = (((const uint8_t *) flash_manager_recovery_page_get()) - ((const uint8_t *) *pp_start) + PAGE_SIZE);
#else
 *pp_start = NULL;
 *p_length = 0;
#endif
 return NRF_SUCCESS;
}

Fullscreen 
 mesh_stack_orig.c 
 Download 
 
 /* Copyright (c) 2010 - 2018, Nordic Semiconductor ASA
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form, except as embedded into a Nordic
 * Semiconductor ASA integrated circuit in a product or a software update for
 * such product, must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other
 * materials provided with the distribution.
 *
 * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * 4. This software, with or without modification, must only be used with a
 * Nordic Semiconductor ASA integrated circuit.
 *
 * 5. Any software provided in binary form under this license must not be reverse
 * engineered, decompiled, modified and/or disassembled.
 *
 * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "mesh_stack.h"
#include "nrf_mesh_events.h"
#include "access_config.h"
#include "flash_manager.h"
#include "device_state_manager.h"
#include "config_server.h"
#include "health_server.h"
#include "net_state.h"
#include "hal.h"
#include "mesh_config.h"
#include "mesh_config_backend_glue.h"

#if GATT_PROXY
#include "proxy.h"
#endif

static health_server_t m_health_server;

static void device_reset(void)
{
 hal_device_reset(0);
}

uint32_t mesh_stack_init(const mesh_stack_init_params_t * p_init_params,
 bool * p_device_provisioned)
{
 uint32_t status;

 if (p_init_params == NULL)
 {
 return NRF_ERROR_NULL;
 }

 /* Initialize the mesh stack */
 status = nrf_mesh_init(&p_init_params->core);
 if (status != NRF_SUCCESS)
 {
 return status;
 }

 /* Initialize the access layer */
 dsm_init();
 access_init();

 /* Initialize the configuration server */
 status = config_server_init(p_init_params->models.config_server_cb);
 if (status != NRF_SUCCESS)
 {
 return status;
 }

 /* Initialize the health server for the primary element */
 status = health_server_init(&m_health_server, 0, DEVICE_COMPANY_ID,
 p_init_params->models.health_server_attention_cb,
 p_init_params->models.p_health_server_selftest_array,
 p_init_params->models.health_server_num_selftests);
 if (status != NRF_SUCCESS)
 {
 return status;
 }

 /* Give application opportunity to initialize application specific models */
 if (p_init_params->models.models_init_cb != NULL)
 {
 p_init_params->models.models_init_cb();
 }

 /* Load configuration, and check if the device has already been provisioned */
 mesh_config_load();

 (void) dsm_flash_config_load();
 (void) access_flash_config_load();

 bool is_provisioned = mesh_stack_is_device_provisioned();

#if GATT_PROXY
 if (is_provisioned)
 {
 proxy_init();
 }
#endif

 if (p_device_provisioned != NULL)
 {
 *p_device_provisioned = is_provisioned;
 }

 return NRF_SUCCESS;
}

uint32_t mesh_stack_start(void)
{
 /* If the device is provisioned, the proxy state is automatically recovered from flash when
 * mesh_config loads the configuration. */
 uint32_t status = nrf_mesh_enable();
#if GATT_PROXY
 if (status == NRF_SUCCESS &&
 mesh_stack_is_device_provisioned() &&
 proxy_is_enabled())
 {
 (void) proxy_start();
 }
#endif
 return status;
}

uint32_t mesh_stack_provisioning_data_store(const nrf_mesh_prov_provisioning_data_t * p_prov_data,
 const uint8_t * p_devkey)
{
 dsm_handle_t netkey_handle, devkey_handle;
 dsm_local_unicast_address_t local_address;
 local_address.address_start = p_prov_data->address;
 local_address.count = ACCESS_ELEMENT_COUNT;
 uint32_t status;

 /* Store received provisioning data in the DSM */
 status = dsm_local_unicast_addresses_set(&local_address);
 if (status != NRF_SUCCESS)
 {
 return status;
 }
 status = dsm_subnet_add(p_prov_data->netkey_index, p_prov_data->netkey, &netkey_handle);
 if (status != NRF_SUCCESS)
 {
 return status;
 }
 status = dsm_devkey_add(p_prov_data->address, netkey_handle, p_devkey, &devkey_handle);
 if (status != NRF_SUCCESS)
 {
 return status;
 }

 NRF_MESH_ERROR_CHECK(net_state_iv_index_set(p_prov_data->iv_index, p_prov_data->flags.iv_update));

 /* Bind config server to the device key */
 status = config_server_bind(devkey_handle);
 if (status != NRF_SUCCESS)
 {
 return status;
 }

 /* Store new config server binding. */
 access_flash_config_store();
 return status;
}

void mesh_stack_config_clear(void)
{
 access_clear();
 dsm_clear();
 net_state_reset();
}

bool mesh_stack_is_device_provisioned(void)
{
 dsm_local_unicast_address_t addr;
 dsm_local_unicast_addresses_get(&addr);
 return (addr.address_start != NRF_MESH_ADDR_UNASSIGNED);
}

#if PERSISTENT_STORAGE
static void mesh_evt_handler(const nrf_mesh_evt_t * p_evt)
{
 if (p_evt->type == NRF_MESH_EVT_FLASH_STABLE)
 {
 device_reset();
 }
}
void mesh_stack_device_reset(void)
{
 /* We have to do this elaborate dance to avoid nested
 * calls to bearer event. It should be possible to call this
 * function from within a bearer_event_process context.
 */
 if (flash_manager_is_stable())
 {
 device_reset();
 }
 else
 {
 static nrf_mesh_evt_handler_t s_evt_handler = {
 .evt_cb = mesh_evt_handler
 };

 nrf_mesh_evt_handler_add(&s_evt_handler);
 }
}

#else

void mesh_stack_device_reset(void)
{
 device_reset();
}
#endif /* PERSISTENT_STORAGE */

uint32_t mesh_stack_persistence_flash_usage(const uint32_t ** pp_start, uint32_t * p_length)
{
 if (pp_start == NULL || p_length == NULL)
 {
 return NRF_ERROR_NULL;
 }

#if PERSISTENT_STORAGE
 mesh_config_backend_flash_usage_t mesh_config_usage;
 mesh_config_backend_flash_usage_get(&mesh_config_usage);
 if (mesh_config_usage.p_start != NULL)
 {
 *pp_start = mesh_config_usage.p_start;
 }
 else
 {
 /* If there's no mesh config present in flash, access holds the lowest flash area. */
 *pp_start = access_flash_area_get();
 }
 *p_length = (((const uint8_t *) flash_manager_recovery_page_get()) - ((const uint8_t *) *pp_start) + PAGE_SIZE);
#else
 *pp_start = NULL;
 *p_length = 0;
#endif
 return NRF_SUCCESS;
}

Below is the diff file:

Fullscreen 
 mesh_stack.diff 
 Download 
 
 --- mesh_stack_orig.c	2018-09-20 15:55:47.109248666 +0200
+++ mesh_stack_fixed.c	2018-09-20 15:55:50.709248666 +0200
@@ -51,6 +51,9 @@
 #include "proxy.h"
 #endif
 
+#include "nrf_nvic.h"
+#include "mesh_app_utils.h"
+
 static health_server_t m_health_server;
 
 static void device_reset(void)
@@ -102,6 +105,9 @@
 p_init_params->models.models_init_cb();
 }
 
+ uint8_t is_nested;
+ ERROR_CHECK(sd_nvic_critical_region_enter(&is_nested));
+
 /* Load configuration, and check if the device has already been provisioned */
 mesh_config_load();
 
@@ -122,6 +128,8 @@
 *p_device_provisioned = is_provisioned;
 }
 
+ ERROR_CHECK(sd_nvic_critical_region_exit(is_nested));
+
 return NRF_SUCCESS;
 }

pohakansson · Answer

Hi Bj&oslash;rn, 
 Works fine for me, thanks. 
 BR, P&auml;r-Olof

Mesh relay configuration on proxy node causes assert at next startup

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