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feat(nvs_flash): Added purging of erased items at namespace level

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- Added new option NVS_READWRITE_PURGE for nvs_open. All update and erase operations of
    the handle are wiping out the content erased items on top of just marking them erased.
  - Added new API call nvs_purge_all allowing to wipe out the existing erased items
    of the handle.
This commit is contained in:
radek.tandler
2026-02-05 11:07:43 +01:00
parent b970f0f31b
commit d50c7b4b6b
20 changed files with 757 additions and 129 deletions
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components/nvs_flash/src/nvs_partition_manager.cpp
+5 -3
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@@ -195,17 +195,19 @@ esp_err_t NVSPartitionManager::open_handle(const char *part_name,
return ESP_ERR_NVS_PART_NOT_FOUND;
}
if (open_mode == NVS_READWRITE && const_cast<Partition*>(sHandle->getPart())->get_readonly()) {
#define WANTS_WRITE_MODE(mode) ((mode) == NVS_READWRITE || (mode) == NVS_READWRITE_PURGE)
if (WANTS_WRITE_MODE(open_mode) && const_cast<Partition*>(sHandle->getPart())->get_readonly()) {
return ESP_ERR_NOT_ALLOWED;
}
esp_err_t err = sHandle->createOrOpenNamespace(ns_name, open_mode == NVS_READWRITE, nsIndex);
esp_err_t err = sHandle->createOrOpenNamespace(ns_name, WANTS_WRITE_MODE(open_mode), nsIndex);
if (err != ESP_OK) {
return err;
}
NVSHandleSimple* new_handle = new (std::nothrow) NVSHandleSimple(open_mode==NVS_READONLY, nsIndex, sHandle);
NVSHandleSimple* new_handle = new (std::nothrow) NVSHandleSimple(open_mode==NVS_READONLY, nsIndex, sHandle, open_mode==NVS_READWRITE_PURGE);
if (new_handle == nullptr) {
return ESP_ERR_NO_MEM;
}