OVMS3-idf/components/spiffs/include/esp_spiffs.h
Ivan Grokhotkov 750818de72 spiffs: clarify the usage of partition_label, fix the example
* If esp_vfs_spiffs_register is called with an explicit partition
  label, other SPIFFS functions (info, format, unregister) must be
  called with the same label.

* On the other hand, if label was NULL in the call to
  esp_vfs_spiffs_register and the first matching partition was used,
  calls to the rest of the SPIFFS functions should be done with NULL
  partition_label argument.

Fix the Doxygen documentation. Update the example accordingly, in case
a user modifies "partition_label" value in esp_vfs_spiffs_conf_t conf
initializer.

Closes https://github.com/espressif/esp-idf/issues/4450
2019-12-23 18:20:14 +01:00

99 lines
3.3 KiB
C

// Copyright 2015-2017 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef _ESP_SPIFFS_H_
#define _ESP_SPIFFS_H_
#include <stdbool.h>
#include "esp_err.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Configuration structure for esp_vfs_spiffs_register
*/
typedef struct {
const char* base_path; /*!< File path prefix associated with the filesystem. */
const char* partition_label; /*!< Optional, label of SPIFFS partition to use. If set to NULL, first partition with subtype=spiffs will be used. */
size_t max_files; /*!< Maximum files that could be open at the same time. */
bool format_if_mount_failed; /*!< If true, it will format the file system if it fails to mount. */
} esp_vfs_spiffs_conf_t;
/**
* Register and mount SPIFFS to VFS with given path prefix.
*
* @param conf Pointer to esp_vfs_spiffs_conf_t configuration structure
*
* @return
* - ESP_OK if success
* - ESP_ERR_NO_MEM if objects could not be allocated
* - ESP_ERR_INVALID_STATE if already mounted or partition is encrypted
* - ESP_ERR_NOT_FOUND if partition for SPIFFS was not found
* - ESP_FAIL if mount or format fails
*/
esp_err_t esp_vfs_spiffs_register(const esp_vfs_spiffs_conf_t * conf);
/**
* Unregister and unmount SPIFFS from VFS
*
* @param partition_label Same label as passed to esp_vfs_spiffs_register.
*
* @return
* - ESP_OK if successful
* - ESP_ERR_INVALID_STATE already unregistered
*/
esp_err_t esp_vfs_spiffs_unregister(const char* partition_label);
/**
* Check if SPIFFS is mounted
*
* @param partition_label Optional, label of the partition to check.
* If not specified, first partition with subtype=spiffs is used.
*
* @return
* - true if mounted
* - false if not mounted
*/
bool esp_spiffs_mounted(const char* partition_label);
/**
* Format the SPIFFS partition
*
* @param partition_label Same label as passed to esp_vfs_spiffs_register.
* @return
* - ESP_OK if successful
* - ESP_FAIL on error
*/
esp_err_t esp_spiffs_format(const char* partition_label);
/**
* Get information for SPIFFS
*
* @param partition_label Same label as passed to esp_vfs_spiffs_register
* @param[out] total_bytes Size of the file system
* @param[out] used_bytes Current used bytes in the file system
*
* @return
* - ESP_OK if success
* - ESP_ERR_INVALID_STATE if not mounted
*/
esp_err_t esp_spiffs_info(const char* partition_label, size_t *total_bytes, size_t *used_bytes);
#ifdef __cplusplus
}
#endif
#endif /* _ESP_SPIFFS_H_ */