Module Safety Plan#

Persistency Safety Plan		status: valid security: NO safety: ASIL_B
tags: persistency version: 2 realizes: wp__module_safety_plan

doc__persistency_safety_plan		Generic Document

note:: The module safety plan shall be continuously maintained during the project. Deviations to the module safety plan are documented here.

Functional Safety Management Context#

This Safety Plan adds to the wp__platform_safety_plan all the module development relevant work products needed for ISO 26262 conformity.

Functional Safety Management Scope#

This Safety Plan’s scope is a SW module of the SW platform Persistency Documentation. The module consists of one or more SW components and will be qualified as a SEooC.

Functional Safety Management Roles#

Table 5 Module roles#
Role	Assignee
Safety Manager	Volker Häussler
Module Project Manager (= Feature team lead)	Uwe Maucher

Tailoring#

Additional to the tailoring in the SW platform project as defined in the wp__platform_safety_plan we define here the additional tailoring on module level.

Excluded for this module are additionally the following work products (and their related requirements):
- none
Notes on the execution of the planned work products:
- The component safety analyses (KVS FMEA (doc__kvs_fmea), KVS DFA (doc__kvs_dfa)) refer to the feature safety analyses, because the KVS component has no internal components (KVS Component Architecture (doc__kvs_component_architecture)).
- The detailed design is captured in the source code (public API headers and traits, source code comments) according to gd_guidl__implementation. KVS Detailed Design (doc__kvs_detailed_design) documents the decomposition into units.

Functional Safety Module Work products#

One set of work products for the module and one set for each component of the module:

Module Work products List#

Table 6 Module Work products#
Work product Id	Link to process	Process status	Link to WP
wp__module_safety_plan	gd_guidl__saf_plan_definitions	valid	this document
wp__module_safety_package	gd_guidl__saf_package	valid	this document (including the linked documentation)
wp__fdr_reports (module Safety Plan)	gd_chklst__safety_plan	valid	Persistency Safety Plan For... (doc__persistency_safety_plan_fdr)
wp__fdr_reports (module Safety Package)	gd_chklst__safety_package	valid	Persistency Safety Package ... (doc__persistency_safety_package_fdr)
wp__fdr_reports (module’s Safety Analyses & DFA)	gd_chklst__safety_analysis	valid	Persistency Safety Analysis... (doc__module_safety_analysis_fdr)
wp__audit_report	performed by external experts	n/a	n/a
wp__module_safety_manual	gd_temp__safety_manual	valid	Persistency Safety Manual (doc__persistency_safety_manual)
wp__verification_module_ver_report	gd_temp__mod_ver_report	valid	Persistency Module Verifica... (mod_vrep__persistency__report)
wp__module_sw_release_note	gd_temp__rel_mod_rel_note	valid	Persistency Release Note (doc__persistency_release_note)
wp__module_user_manual	gd_temp__rel_mod_user_manual	valid	Persistency User Manual (doc__persistency_user_manual)

Component KVS Work products List#

Table 7 Component KVS Work products#
Work product Id	Link to process	Process status	Link to WP
wp__requirements_comp	gd_temp__req_comp_req	valid	KVS Requirements (doc__kvs_requirements)
wp__requirements_comp_aou	gd_temp__req_aou_req	valid	KVS Requirements (doc__kvs_requirements)
wp__requirements_inspect	gd_chklst__req_inspection	valid	KVS Requirements Inspection... (doc__kvs_req_inspection)
wp__component_arch	gd_temp__arch_comp	valid	KVS Component Architecture (doc__kvs_component_architecture)
wp__sw_arch_verification	gd_chklst__arch_inspection_checklist	valid	KVS Architecture Inspection... (doc__kvs_arc_inspection)
wp__sw_component_fmea	gd_temp__comp_saf_fmea	valid	KVS FMEA (doc__kvs_fmea)
wp__sw_component_dfa	gd_temp__comp_saf_dfa	valid	KVS DFA (doc__kvs_dfa)
wp__sw_implementation	gd_guidl__implementation	valid	KVS Detailed Design (doc__kvs_detailed_design) & source code
wp__verification_sw_unit_test	gd_guidl__verification_guide	valid	Bazel test suites `//score/kvs:unit_tests` (C++) and `//score/kvs/rust_kvs:unit_tests` (Rust), results in Persistency Module Verifica... (mod_vrep__persistency__report)
wp__sw_implementation_inspection	gd_chklst__impl_inspection_checklist	valid	KVS Implementation Inspecti... (doc__kvs_impl_inspection)
wp__verification_comp_int_test	gd_guidl__verification_guide	valid	Bazel test suites `//score/kvs/tests/test_cases:cit_cpp` and `//score/kvs/tests/test_cases:cit_rust`, results in Persistency Module Verifica... (mod_vrep__persistency__report)

The KVS component is a new development, so no wp__sw_component_class is planned for it.

OSS (sub-)component qualification plan#

The Rust implementation of the KVS component uses the OSS crates tinyjson (JSON parsing and generation) and adler32 (checksum). The C++ implementation uses the S-CORE baselibs only.

The classification of these OSS crates (wp__sw_component_class) and the resulting qualification plan are open, see Deviations from Module Safety Plan.

Link to project planning#

Persistency Feature Team Planning

Module Safety Package#

To create the safety package (according to gd_guidl__saf_package) the following documents and work products status have to go to “valid” (after the relevant verification were performed).

Module Documents Status#

For all the work product documents the status can be seen by following the “Link to WP” and in Persistency Documentation.

Component Documents Status#

For all the work product documents the status can be seen by following the “Link to WP” and in Component documentation.

Component Requirements Status#

ID	Status
comp_req__kvs__async_api	valid
comp_req__kvs__atomic_store	valid
comp_req__kvs__cached_access	valid
comp_req__kvs__callback_support	valid
comp_req__kvs__concurrency	valid
comp_req__kvs__constraints	valid
comp_req__kvs__constraints_priority	valid
comp_req__kvs__corruption_detect_open	valid
comp_req__kvs__default_storage_permissions	valid
comp_req__kvs__default_val_chksum	valid
comp_req__kvs__default_value_cfg	valid
comp_req__kvs__default_value_cfg_tool	valid
comp_req__kvs__default_value_types	valid
comp_req__kvs__default_value_query	valid
comp_req__kvs__default_value_is_default_api	valid
comp_req__kvs__discard_pending_changes_api	valid
comp_req__kvs__explicit_flush	valid
comp_req__kvs__explicit_snapshot_operations	valid
comp_req__kvs__key_encoding	valid
comp_req__kvs__key_exists_api	valid
comp_req__kvs__key_length	valid
comp_req__kvs__key_list_api	valid
comp_req__kvs__key_naming	valid
comp_req__kvs__key_remove_api	valid
comp_req__kvs__key_uniqueness	valid
comp_req__kvs__key_value_overwrite	valid
comp_req__kvs__language_bindings	valid
comp_req__kvs__snapshot_max_num_cfg	valid
comp_req__kvs__multi_instance	valid
comp_req__kvs__no_dynamic_memory	valid
comp_req__kvs__open_need_kvs_behavior	valid
comp_req__kvs__os_abstraction	valid
comp_req__kvs__permission_control	valid
comp_req__kvs__permission_err_hndl	valid
comp_req__kvs__pers_data_migration	valid
comp_req__kvs__pers_data_schema	valid
comp_req__kvs__pers_data_store_bnd	valid
comp_req__kvs__pers_data_csum_vrfy	valid
comp_req__kvs__pers_data_csum	valid
comp_req__kvs__pers_data_store_fmt	valid
comp_req__kvs__pers_data_version	valid
comp_req__kvs__random_access_complexity	valid
comp_req__kvs__recovery_snapshot_restore	valid
comp_req__kvs__reset_resistant_write	valid
comp_req__kvs__single_process_access	valid
comp_req__kvs__snapshot_create	valid
comp_req__kvs__snapshot_create_api	valid
comp_req__kvs__snapshot_source	valid
comp_req__kvs__snapshot_overwrite	valid
comp_req__kvs__snapshot_remove_api	valid
comp_req__kvs__snapshot_restore_api	valid
comp_req__kvs__snapshot_slot_free_api	valid
comp_req__kvs__snapshot_slot_index_vali	valid
comp_req__kvs__snapshot_id_api	valid
comp_req__kvs__storage_backend_select	valid
comp_req__kvs__storage_file_permissions	valid
comp_req__kvs__storage_tool	valid
comp_req__kvs__store_reset_api	valid
comp_req__kvs__value_data_types	valid
comp_req__kvs__value_default	valid
comp_req__kvs__value_reset	valid
comp_req__kvs__value_get_api	valid
comp_req__kvs__value_serialize	valid
comp_req__kvs__value_set_api	valid
comp_req__kvs__write_amplification	valid

Component AoU Status#

No needs passed the filters

Component Architecture Status#

ID	Status
comp_arc_sta__kvs__static_view	invalid
comp_arc_sta__kvs__2	invalid
comp_arc_dyn__kvs__dynamic_view	invalid
comp_arc_sta__persistency_kvs__sv	valid

Deviations from Module Safety Plan#

The following deviations from the module safety plan are present in the module safety package. These are deviations from planned processes execution and/or work product results, safety anomalies in the sense of known bugs in the software are reported in the release notes.

Table 8 Deviations from the module safety plan#
Work product	Deviation	Planned resolution
wp__sw_component_class	The OSS crates `tinyjson` and `adler32` used by the Rust implementation are not classified. The previous classification of Tiny JSON was removed with the change of the architecture to the baselibs JSON interface.	Classify the crates or replace them by the baselibs interfaces in the Rust implementation.