/* Set */ eEsifError DataVault_SetValue( DataVaultPtr self, EsifDataPtr path, EsifDataPtr value, esif_flags_t flags ) { eEsifError rc = ESIF_OK; DataCacheEntryPtr keypair; if (FLAGS_TEST(self->flags, ESIF_SERVICE_CONFIG_STATIC | ESIF_SERVICE_CONFIG_READONLY)) { return ESIF_E_READONLY; } // Ignore value for DELETEs if (FLAGS_TEST(flags, ESIF_SERVICE_CONFIG_DELETE)) { value = NULL; } // AUTO data types or AUTO_ALLOCATE are not allowed for SET if (value && (value->type == ESIF_DATA_AUTO || value->buf_len == ESIF_DATA_ALLOCATE)) { return ESIF_E_UNSUPPORTED_RESULT_DATA_TYPE; } // Reject SETs for static-sized data types whose buffer is too small if (value) { u32 len = (u32) esif_data_type_sizeof(value->type); if (len > 0 && value->buf_len < len) { value->data_len = len; return ESIF_E_NEED_LARGER_BUFFER; } } // Write to Log DataVault_WriteLog(self, (flags & ESIF_SERVICE_CONFIG_DELETE ? "DELETE" : "SET"), self->name, path, flags, value); // Delete DataVault Key(s)? if (esif_ccb_strpbrk((esif_string)path->buf_ptr, "*?") != NULL) { if (flags & ESIF_SERVICE_CONFIG_DELETE) { UInt32 item = 0; while (item < self->cache->size) { if (esif_ccb_strmatch((esif_string)self->cache->elements[item].key.buf_ptr, (esif_string)path->buf_ptr)) { flags |= FLAGS_TEST(self->cache->elements[item].flags, ESIF_SERVICE_CONFIG_PERSIST); if (DataCache_DeleteValue(self->cache, (esif_string)self->cache->elements[item].key.buf_ptr) == ESIF_OK) { continue; } } item++; } goto exit; } return ESIF_E_NOT_SUPPORTED; // Keys may not contain "*" or "?" } // Read data from File // TODO: Change Parser Logic and Syntax instead if (value && value->buf_ptr && esif_ccb_strncmp((char*)value->buf_ptr, "<<", 2) == 0) { void *buffer = 0; UInt32 buflen = 0; if (ReadFileIntoBuffer((char*)value->buf_ptr + 2, &buffer, &buflen) == ESIF_OK) { if (value->buf_len) { esif_ccb_free(value->buf_ptr); } value->buf_ptr = buffer; if (value->type == ESIF_DATA_STRING) { buflen++; // Include Null Terminator } value->buf_len = value->data_len = buflen; } else { return ESIF_E_UNSPECIFIED; // TODO: File Not Found } } // Get the Data Row or create it if it does not exist keypair = DataCache_GetValue(self->cache, (esif_string)path->buf_ptr); if (keypair) { // Match Found // READONLY? if (keypair->flags & ESIF_SERVICE_CONFIG_READONLY) { rc = ESIF_E_READONLY; } // DELETE? else if (flags & ESIF_SERVICE_CONFIG_DELETE) { flags |= keypair->flags; DataCache_DeleteValue(self->cache, (esif_string)path->buf_ptr); } else if (value && value->buf_ptr) { // UPDATE if (keypair->value.buf_len > 0 && value->data_len != keypair->value.buf_len) { void *new_buf = NULL; u32 new_buf_len = 0; // Grow or shrink buffer if it was allocated, otherwise ask for a larger buffer new_buf_len = esif_ccb_max(1, value->data_len); new_buf= (void *)esif_ccb_realloc(keypair->value.buf_ptr, new_buf_len); if (new_buf == NULL) { return ESIF_E_NEED_LARGER_BUFFER; } else { keypair->value.buf_len = new_buf_len; keypair->value.buf_ptr = new_buf; } } // Replace the File Offset stored in buf_ptr with a copy of the data for updated NOCACHE values if (keypair->flags & ESIF_SERVICE_CONFIG_NOCACHE && keypair->value.buf_len == 0) { keypair->value.buf_len = esif_ccb_max(1, value->data_len); keypair->value.buf_ptr = esif_ccb_malloc(value->buf_len); } keypair->flags = flags; keypair->value.type = value->type; keypair->value.data_len = value->data_len; esif_ccb_memcpy(keypair->value.buf_ptr, value->buf_ptr, value->data_len); rc = ESIF_OK; } } else if (value && value->buf_ptr && !(flags & ESIF_SERVICE_CONFIG_DELETE)) { EsifDataPtr valueClonePtr = NULL; // // The data passed in may be in a buffer owned elsewhere, so clone the data // valueClonePtr = EsifData_Clone(value); if (NULL == valueClonePtr) { rc = ESIF_E_NO_MEMORY; goto exit; } DataCache_InsertValue(self->cache, (esif_string)path->buf_ptr, valueClonePtr, flags); EsifData_Destroy(valueClonePtr); } exit: // If Persisted, Flush to disk if (rc == ESIF_OK && FLAGS_TEST(flags, ESIF_SERVICE_CONFIG_PERSIST)) { rc = DataVault_WriteVault(self); } return rc; }
/* Set */ eEsifError DataVault_SetValue ( DataVaultPtr self, EsifDataPtr path, EsifDataPtr value, esif_flags_t flags ) { eEsifError rc = ESIF_OK; DataCacheEntryPtr keypair; if (FLAGS_TEST(self->flags, ESIF_SERVICE_CONFIG_STATIC | ESIF_SERVICE_CONFIG_READONLY)) { return ESIF_E_READONLY; } // Ignore value for DELETEs if (FLAGS_TEST(flags, ESIF_SERVICE_CONFIG_DELETE)) { value = NULL; } // TODO: Locking // AUTO data types or AUTO_ALLOCATE are not allowed for SET if (value && (value->type == ESIF_DATA_AUTO || value->buf_len == ESIF_DATA_ALLOCATE)) { return ESIF_E_UNSUPPORTED_RESULT_DATA_TYPE; } // Write to Log DataVault_WriteLog(self, (flags & ESIF_SERVICE_CONFIG_DELETE ? "DELETE" : "SET"), self->name, path, flags, value); // Delete entire DataVault? if (strcmp((esif_string)path->buf_ptr, "*") == 0) { if (flags & ESIF_SERVICE_CONFIG_DELETE) { DataCache_Destroy(self->cache); if ((self->cache = DataCache_Create()) == NULL) { return ESIF_E_NO_MEMORY; } DataVault_WriteVault(self); return ESIF_OK; } return ESIF_E_NOT_SUPPORTED;// "*" is an invalid key value } // Read data from File // TODO: Change Parser Logic and Syntax instead if (value && value->buf_ptr && esif_ccb_strncmp((char*)value->buf_ptr, "<<", 2) == 0) { void *buffer = 0; UInt32 buflen = 0; if (DataVault_ReadFile(self, (char*)value->buf_ptr + 2, &buffer, &buflen) == ESIF_OK) { value->buf_ptr = buffer; if (value->type == ESIF_DATA_STRING) { buflen++; // Include Null Terminator } value->buf_len = value->data_len = buflen; } else { return ESIF_E_UNSPECIFIED; // TODO: File Not Found } } // Get the Data Row or create it if it does not exist keypair = DataCache_GetValue(self->cache, (esif_string)path->buf_ptr); if (keypair) { // Match Found // READONLY? if (keypair->flags & ESIF_SERVICE_CONFIG_READONLY) { rc = ESIF_E_READONLY; } // DELETE? else if (flags & ESIF_SERVICE_CONFIG_DELETE) { flags |= keypair->flags; DataCache_Delete(self->cache, (esif_string)path->buf_ptr); } else if (value && value->buf_ptr) { // UPDATE #ifdef ESIF_ATTR_OS_WINDOWS // Update Registry Value for REGKEY values if REGLINK is *NOT* specified in SET command if ((keypair->flags & ESIF_SERVICE_CONFIG_REGLINK) && !(flags & ESIF_SERVICE_CONFIG_REGLINK)) { keypair->value.type = value->type; rc = DataVault_WriteRegistry(self, (esif_string)keypair->value.buf_ptr, value); } else // ... #endif if (keypair->value.buf_len && value->data_len > keypair->value.buf_len) { rc = ESIF_E_NEED_LARGER_BUFFER; } else { keypair->flags = flags; keypair->value.type = value->type; keypair->value.data_len = value->data_len; // Replace the File Offset stored in buf_ptr with a copy of the data for updated NOCACHE values if (keypair->flags & ESIF_SERVICE_CONFIG_NOCACHE && keypair->value.buf_len == 0) { keypair->value.buf_ptr = esif_ccb_malloc(value->data_len); keypair->value.buf_len = value->data_len; } esif_ccb_memcpy(keypair->value.buf_ptr, value->buf_ptr, value->data_len); rc = ESIF_OK; } } } else if (value && value->buf_ptr && !(flags & ESIF_SERVICE_CONFIG_DELETE)) { // Copy Key/Value Pair to new Data Row EsifData newkey = {ESIF_DATA_STRING, esif_ccb_strdup((esif_string)path->buf_ptr), path->data_len, path->data_len}; EsifData newvalue = {value->type, esif_ccb_malloc(esif_ccb_max(value->buf_len, value->data_len)), value->data_len, value->data_len}; esif_ccb_memcpy(newvalue.buf_ptr, value->buf_ptr, value->data_len); DataCache_SetValue(self->cache, (esif_string)newkey.buf_ptr, newvalue, flags); esif_ccb_free(newkey.buf_ptr); } // If Persisted, Flush to disk if (rc == ESIF_OK && FLAGS_TEST(flags, ESIF_SERVICE_CONFIG_PERSIST)) { DataVault_WriteVault(self); } return rc; }
// Write DataVault to Disk eEsifError DataVault_WriteVault(DataVaultPtr self) { eEsifError rc = ESIF_OK; DataCacheEntryPtr pairPtr = NULL; IOStreamPtr diskStreamPtr = NULL; IOStreamPtr memStreamPtr = NULL; BytePtr memStreamBuffer = NULL; size_t memStreamBufSize = 0; UInt32 idx; DataCachePtr cacheClonePtr = NULL; if (FLAGS_TEST(self->flags, ESIF_SERVICE_CONFIG_STATIC | ESIF_SERVICE_CONFIG_READONLY)) { rc = ESIF_E_READONLY; goto exit; } if (self->stream->file.name == NULL || self->cache == NULL) { rc = ESIF_E_PARAMETER_IS_NULL; goto exit; } // // As the cache data can be modified while writing the data vault (due to // non-cached values), we create a clone of the current cache so that we can // fall back to it in case of a failure. // cacheClonePtr = DataCache_Clone(self->cache); if ((NULL == cacheClonePtr) && (self->cache != NULL)) { rc = ESIF_E_NO_MEMORY; goto exit; } // // Use a memory stream for creation before writing the final output to a file // memStreamPtr = IOStream_Create(); if (!memStreamPtr) { rc = ESIF_E_NO_MEMORY; goto exit; } if (IOStream_SetMemory(memStreamPtr, NULL, 0) != EOK) { rc = ESIF_E_NO_MEMORY; goto exit; } // // If any rows contain NOCACHE PERSIST values, we need to read them from the // original file before we overwrite it // diskStreamPtr = IOStream_Create(); if (diskStreamPtr == NULL) { rc = ESIF_E_NO_MEMORY; goto exit; } if (IOStream_Seek(memStreamPtr, sizeof(DataVaultHeader), SEEK_CUR) != EOK) { rc = ESIF_E_IO_ERROR; goto exit; } // // Write the key/value pairs to the memory stream for each data category // Fill in the data header for each category after the key/value pairs are written // Note: Only write persisted data // // Write All Persisted Rows from Sorted List to DataVault for (idx = 0; rc == ESIF_OK && idx < self->cache->size; idx++) { pairPtr = &self->cache->elements[idx]; if (!(pairPtr->flags & ESIF_SERVICE_CONFIG_PERSIST)) { continue; } rc = DataVault_WriteKeyValuePair(self, pairPtr, memStreamPtr); if (rc != ESIF_OK) { goto exit; } } // // Now go back and complete the headers // Fill in and write the main header // if (IOStream_Open(memStreamPtr) != EOK) { rc = ESIF_E_IO_ERROR; goto exit; } DataVaultHeader header = { 0 }; esif_ccb_memcpy(&header.signature, ESIFDV_SIGNATURE, sizeof(header.signature)); header.headersize = sizeof(header); header.version = ESIFDV_VERSION(1, 0, ESIFDV_REVISION); header.flags = self->flags; if (IOStream_Write(memStreamPtr, &header, sizeof(header)) != sizeof(header)) { rc = ESIF_E_IO_ERROR; goto exit; } memStreamBuffer = IOStream_GetMemoryBuffer(memStreamPtr); memStreamBufSize = IOStream_GetSize(memStreamPtr); // // Now write the memory stream to the disk // if (rc == ESIF_OK && IOStream_OpenFile(diskStreamPtr, self->stream->file.name, "wb") != EOK) { rc = ESIF_E_IO_OPEN_FAILED; goto exit; } if (rc == ESIF_OK && (IOStream_Write(diskStreamPtr, memStreamBuffer, memStreamBufSize) != memStreamBufSize)) { rc = ESIF_E_IO_ERROR; goto exit; } exit: IOStream_Destroy(diskStreamPtr); IOStream_Destroy(memStreamPtr); if (rc != ESIF_OK && cacheClonePtr != NULL) { DataCache_Destroy(self->cache); self->cache = cacheClonePtr; } else { DataCache_Destroy(cacheClonePtr); } return rc; }
// Write DataVault to Disk eEsifError DataVault_WriteVault (DataVaultPtr self) { eEsifError rc = ESIF_E_NOT_FOUND; DataVaultHeader header; struct esif_ccb_file dv_file = {0}; struct esif_ccb_file dv_filebak = {0}; IOStreamPtr vault = 0; IOStreamPtr vaultBak = 0; u32 idx; if (FLAGS_TEST(self->flags, ESIF_SERVICE_CONFIG_STATIC | ESIF_SERVICE_CONFIG_READONLY)) { return ESIF_E_READONLY; } // TODO: Locking vault = IOStream_Create(); if (!vault) { return ESIF_E_NO_MEMORY; } // If any rows contain NOCACHE PERSIST values, we need to make a copy the original DataVault while creating the new one // esif_ccb_sprintf(MAX_PATH, dv_file.filename, "%s%s", esif_build_path(dv_file.filename, MAX_PATH, NULL, self->name), ESIFDV_FILEEXT); esif_ccb_sprintf(MAX_PATH, dv_file.filename, "%s%s%s", ESIFDV_DIR, self->name, ESIFDV_FILEEXT); for (idx = 0; idx < self->cache->size; idx++) if (FLAGS_TESTALL(self->cache->elements[idx].flags, ESIF_SERVICE_CONFIG_NOCACHE | ESIF_SERVICE_CONFIG_PERSIST) && self->cache->elements[idx].value.buf_len == 0) { struct stat filebak_stat = {0}; esif_ccb_sprintf(MAX_PATH, dv_filebak.filename, "%s%s%s", ESIFDV_DIR, self->name, ESIFDV_BAKFILEEXT); // Delete BAK file if it exists if (esif_ccb_stat(dv_filebak.filename, &filebak_stat) == 0) { esif_ccb_unlink(dv_filebak.filename); } if (esif_ccb_rename(dv_file.filename, dv_filebak.filename) == 0) { if ((vaultBak = IOStream_Create()) == NULL) { rc = ESIF_E_NO_MEMORY; } if (!vaultBak || IOStream_OpenFile(vaultBak, dv_filebak.filename, "rb") != 0) { IOStream_Destroy(vault); IOStream_Destroy(vaultBak); return rc; } } break; } // Create DataVault, Overwrite if necessary IOStream_SetFile(vault, self->stream->file.name, "wb"); if (IOStream_Open(vault) != 0) { if (vaultBak) { IOStream_Destroy(vaultBak); esif_ccb_unlink(dv_filebak.filename); } IOStream_Destroy(vault); return rc; } // Create File Header memset(&header, 0, sizeof(header)); esif_ccb_memcpy(&header.signature, ESIFDV_SIGNATURE, sizeof(header.signature)); header.headersize = sizeof(header); header.version = ESIFDV_VERSION(ESIFDV_MAJOR_VERSION, ESIFDV_MINOR_VERSION, ESIFDV_REVISION); header.flags = 0; // TODO: get from self->flags // Write File Header IOStream_Seek(vault, 0, SEEK_SET); IOStream_Write(vault, &header, sizeof(header)); rc = ESIF_OK; // Write All Persisted Rows from Sorted List to DataVault for (idx = 0; idx < self->cache->size; idx++) { DataCacheEntryPtr keypair = &self->cache->elements[idx]; if (keypair->flags & ESIF_SERVICE_CONFIG_PERSIST) { UInt8 *buffer = 0; UInt32 buffer_len = 0; UInt32 byte = 0; IOStream_Write(vault, &keypair->flags, sizeof(keypair->flags)); IOStream_Write(vault, &keypair->key.data_len, sizeof(keypair->key.data_len)); IOStream_Write(vault, keypair->key.buf_ptr, keypair->key.data_len); IOStream_Write(vault, &keypair->value.type, sizeof(keypair->value.type)); IOStream_Write(vault, &keypair->value.data_len, sizeof(keypair->value.data_len)); // Read NOCACHE Entries from Backup file if (keypair->flags & ESIF_SERVICE_CONFIG_NOCACHE) { size_t offset = IOStream_GetOffset(vault); // Read Block from BAK file if (keypair->value.buf_len == 0) { size_t bakoffset = (size_t)keypair->value.buf_ptr; buffer = (UInt8*)esif_ccb_malloc(keypair->value.data_len); buffer_len = keypair->value.data_len; if (!buffer) { rc = ESIF_E_NO_MEMORY; break; } if (IOStream_Seek(vaultBak, bakoffset, SEEK_SET) != 0 || IOStream_Read(vaultBak, buffer, buffer_len) != buffer_len) { esif_ccb_free(buffer); rc = ESIF_E_UNSPECIFIED;// TODO: ESIF_E_IOERROR; break; } keypair->value.buf_ptr = (void*)offset; } // Convert internal storage to NOCACHE else { buffer = (UInt8*)keypair->value.buf_ptr; buffer_len = keypair->value.data_len; keypair->value.buf_ptr = (void*)offset; keypair->value.buf_len = 0; } } // Encrypt Data? if (keypair->flags & ESIF_SERVICE_CONFIG_ENCRYPT) { if (!buffer) { buffer = (UInt8*)esif_ccb_malloc(keypair->value.data_len); buffer_len = keypair->value.data_len; if (!buffer) { rc = ESIF_E_NO_MEMORY; break; } } for (byte = 0; byte < keypair->value.data_len; byte++) buffer[byte] = ~((UInt8*)(keypair->value.buf_ptr))[byte]; } if (buffer) { IOStream_Write(vault, buffer, buffer_len); esif_ccb_free(buffer); } else { IOStream_Write(vault, keypair->value.buf_ptr, keypair->value.data_len); } } } // Rollback on Error if (rc != ESIF_OK) { IOStream_Destroy(vaultBak); IOStream_Destroy(vault); esif_ccb_unlink(dv_file.filename); IGNORE_RESULT(esif_ccb_rename(dv_filebak.filename, dv_file.filename)); return rc; } // Remove BAK file and Commit if (vaultBak) { IOStream_Close(vaultBak); esif_ccb_unlink(dv_filebak.filename); IOStream_Destroy(vaultBak); } IOStream_Close(vault); IOStream_Destroy(vault); return rc; }