diff options
Diffstat (limited to 'meta-openbmc-mods/meta-common/recipes-phosphor/interfaces/bmcweb/0002-Use-chip-id-based-UUID-for-Service-Root.patch')
-rw-r--r-- | meta-openbmc-mods/meta-common/recipes-phosphor/interfaces/bmcweb/0002-Use-chip-id-based-UUID-for-Service-Root.patch | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-phosphor/interfaces/bmcweb/0002-Use-chip-id-based-UUID-for-Service-Root.patch b/meta-openbmc-mods/meta-common/recipes-phosphor/interfaces/bmcweb/0002-Use-chip-id-based-UUID-for-Service-Root.patch new file mode 100644 index 000000000..e963b1423 --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-phosphor/interfaces/bmcweb/0002-Use-chip-id-based-UUID-for-Service-Root.patch @@ -0,0 +1,72 @@ +From b68d62ddf0a9d77a287a7e9a99762915e31d02b9 Mon Sep 17 00:00:00 2001 +From: Wiktor Golgowski <wiktor.golgowski@linux.intel.com> +Date: Thu, 30 Apr 2020 11:09:35 +0200 +Subject: [PATCH] Use chip id-based UUID for Service Root. +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +If the sysfs-provided chip id is available, it will be used as +payload to generate Service Root UUID from hardcoded namespace. + +Tested: +Generated UUID is consistent between BMC image reflashes. +If the sysfs node is not available, code falls back to randomly +generated UUID. + +Signed-off-by: Wiktor GoĊgowski <wiktor.golgowski@linux.intel.com> + +--- + include/persistent_data_middleware.hpp | 32 +++++++++++++++++++++++++++++--- + 1 file changed, 29 insertions(+), 3 deletions(-) + +diff --git a/include/persistent_data_middleware.hpp b/include/persistent_data_middleware.hpp +index de3a6ba..a20b213 100644 +--- a/include/persistent_data_middleware.hpp ++++ b/include/persistent_data_middleware.hpp +@@ -31,6 +31,10 @@ class Middleware + public: + // todo(ed) should read this from a fixed location somewhere, not CWD + static constexpr const char* filename = "bmcweb_persistent_data.json"; ++ static constexpr const char* chipIdSysfsNode = "/sys/devices/platform" ++ "/ahb/ahb:apb/1e6e2000.syscon/1e6e2000.syscon:misc_control/chip_id"; ++ static constexpr const char* UuidNs = "{b7b0553a-54cc-4162-982d-" ++ "944847ed76f5}"; + + struct Context + {}; +@@ -141,9 +145,31 @@ class Middleware + + if (systemUuid.empty()) + { +- systemUuid = +- boost::uuids::to_string(boost::uuids::random_generator()()); +- needWrite = true; ++ // Try to retrieve chip id-based uuid. ++ std::ifstream chipIdFile(chipIdSysfsNode); ++ if (chipIdFile.is_open()) ++ { ++ std::string chipId; ++ std::getline(chipIdFile, chipId); ++ if (!chipId.empty()) ++ { ++ boost::uuids::name_generator_sha1 gen( ++ boost::uuids::string_generator()(UuidNs)); ++ systemUuid = boost::uuids::to_string(gen(chipId.c_str())); ++ needWrite = true; ++ } ++ else ++ { ++ BMCWEB_LOG_ERROR << "Cannot get chip id-based System UUID."; ++ } ++ } ++ // If the above fails, generate random uuid. ++ if (systemUuid.empty()) ++ { ++ systemUuid = ++ boost::uuids::to_string(boost::uuids::random_generator()()); ++ needWrite = true; ++ } + } + if (fileRevision < jsonRevision) + { |