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nodemcu-firmware/components/spiffs/spiffs.h

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/*
* spiffs.h
*
* Created on: May 26, 2013
* Author: petera
*/
#ifndef SPIFFS_H_
#define SPIFFS_H_
#if defined(__cplusplus)
extern "C" {
#endif
#include "spiffs_config.h"
#define SPIFFS_OK 0
#define SPIFFS_ERR_NOT_MOUNTED -10000
#define SPIFFS_ERR_FULL -10001
#define SPIFFS_ERR_NOT_FOUND -10002
#define SPIFFS_ERR_END_OF_OBJECT -10003
#define SPIFFS_ERR_DELETED -10004
#define SPIFFS_ERR_NOT_FINALIZED -10005
#define SPIFFS_ERR_NOT_INDEX -10006
#define SPIFFS_ERR_OUT_OF_FILE_DESCS -10007
#define SPIFFS_ERR_FILE_CLOSED -10008
#define SPIFFS_ERR_FILE_DELETED -10009
#define SPIFFS_ERR_BAD_DESCRIPTOR -10010
#define SPIFFS_ERR_IS_INDEX -10011
#define SPIFFS_ERR_IS_FREE -10012
#define SPIFFS_ERR_INDEX_SPAN_MISMATCH -10013
#define SPIFFS_ERR_DATA_SPAN_MISMATCH -10014
#define SPIFFS_ERR_INDEX_REF_FREE -10015
#define SPIFFS_ERR_INDEX_REF_LU -10016
#define SPIFFS_ERR_INDEX_REF_INVALID -10017
#define SPIFFS_ERR_INDEX_FREE -10018
#define SPIFFS_ERR_INDEX_LU -10019
#define SPIFFS_ERR_INDEX_INVALID -10020
#define SPIFFS_ERR_NOT_WRITABLE -10021
#define SPIFFS_ERR_NOT_READABLE -10022
#define SPIFFS_ERR_CONFLICTING_NAME -10023
#define SPIFFS_ERR_NOT_CONFIGURED -10024
#define SPIFFS_ERR_NOT_A_FS -10025
#define SPIFFS_ERR_MOUNTED -10026
#define SPIFFS_ERR_ERASE_FAIL -10027
#define SPIFFS_ERR_MAGIC_NOT_POSSIBLE -10028
#define SPIFFS_ERR_NO_DELETED_BLOCKS -10029
#define SPIFFS_ERR_INTERNAL -10050
#define SPIFFS_ERR_TEST -10100
// spiffs file descriptor index type. must be signed
typedef s16_t spiffs_file;
// spiffs file descriptor flags
typedef u16_t spiffs_flags;
// spiffs file mode
typedef u16_t spiffs_mode;
// object type
typedef u8_t spiffs_obj_type;
/* spi read call function type */
typedef s32_t (*spiffs_read)(u32_t addr, u32_t size, u8_t *dst);
/* spi write call function type */
typedef s32_t (*spiffs_write)(u32_t addr, u32_t size, u8_t *src);
/* spi erase call function type */
typedef s32_t (*spiffs_erase)(u32_t addr, u32_t size);
/* file system check callback report operation */
typedef enum {
SPIFFS_CHECK_LOOKUP = 0,
SPIFFS_CHECK_INDEX,
SPIFFS_CHECK_PAGE
} spiffs_check_type;
/* file system check callback report type */
typedef enum {
SPIFFS_CHECK_PROGRESS = 0,
SPIFFS_CHECK_ERROR,
SPIFFS_CHECK_FIX_INDEX,
SPIFFS_CHECK_FIX_LOOKUP,
SPIFFS_CHECK_DELETE_ORPHANED_INDEX,
SPIFFS_CHECK_DELETE_PAGE,
SPIFFS_CHECK_DELETE_BAD_FILE,
} spiffs_check_report;
/* file system check callback function */
typedef void (*spiffs_check_callback)(spiffs_check_type type, spiffs_check_report report,
u32_t arg1, u32_t arg2);
#ifndef SPIFFS_DBG
#define SPIFFS_DBG(...) \
print(__VA_ARGS__)
#endif
#ifndef SPIFFS_GC_DBG
#define SPIFFS_GC_DBG(...) printf(__VA_ARGS__)
#endif
#ifndef SPIFFS_CACHE_DBG
#define SPIFFS_CACHE_DBG(...) printf(__VA_ARGS__)
#endif
#ifndef SPIFFS_CHECK_DBG
#define SPIFFS_CHECK_DBG(...) printf(__VA_ARGS__)
#endif
/* Any write to the filehandle is appended to end of the file */
#define SPIFFS_APPEND (1<<0)
/* If the opened file exists, it will be truncated to zero length before opened */
#define SPIFFS_TRUNC (1<<1)
/* If the opened file does not exist, it will be created before opened */
#define SPIFFS_CREAT (1<<2)
/* The opened file may only be read */
#define SPIFFS_RDONLY (1<<3)
/* The opened file may only be writted */
#define SPIFFS_WRONLY (1<<4)
/* The opened file may be both read and writted */
#define SPIFFS_RDWR (SPIFFS_RDONLY | SPIFFS_WRONLY)
/* Any writes to the filehandle will never be cached */
#define SPIFFS_DIRECT (1<<5)
#define SPIFFS_SEEK_SET (0)
#define SPIFFS_SEEK_CUR (1)
#define SPIFFS_SEEK_END (2)
#define SPIFFS_TYPE_FILE (1)
#define SPIFFS_TYPE_DIR (2)
#define SPIFFS_TYPE_HARD_LINK (3)
#define SPIFFS_TYPE_SOFT_LINK (4)
#ifndef SPIFFS_LOCK
#define SPIFFS_LOCK(fs)
#endif
#ifndef SPIFFS_UNLOCK
#define SPIFFS_UNLOCK(fs)
#endif
// phys structs
// spiffs spi configuration struct
typedef struct {
// physical read function
spiffs_read hal_read_f;
// physical write function
spiffs_write hal_write_f;
// physical erase function
spiffs_erase hal_erase_f;
#if SPIFFS_SINGLETON == 0
// physical size of the spi flash
u32_t phys_size;
// physical offset in spi flash used for spiffs,
// must be on block boundary
u32_t phys_addr;
// physical size when erasing a block
u32_t phys_erase_block;
// logical size of a block, must be on physical
// block size boundary and must never be less than
// a physical block
u32_t log_block_size;
// logical size of a page, must be at least
// log_block_size / 8
u32_t log_page_size;
#endif
} spiffs_config;
typedef struct {
// file system configuration
spiffs_config cfg;
// number of logical blocks
u32_t block_count;
// cursor for free blocks, block index
spiffs_block_ix free_cursor_block_ix;
// cursor for free blocks, entry index
int free_cursor_obj_lu_entry;
// cursor when searching, block index
spiffs_block_ix cursor_block_ix;
// cursor when searching, entry index
int cursor_obj_lu_entry;
// primary work buffer, size of a logical page
u8_t *lu_work;
// secondary work buffer, size of a logical page
u8_t *work;
// file descriptor memory area
u8_t *fd_space;
// available file descriptors
u32_t fd_count;
// last error
s32_t err_code;
// current number of free blocks
u32_t free_blocks;
// current number of busy pages
u32_t stats_p_allocated;
// current number of deleted pages
u32_t stats_p_deleted;
// flag indicating that garbage collector is cleaning
u8_t cleaning;
// max erase count amongst all blocks
spiffs_obj_id max_erase_count;
#if SPIFFS_GC_STATS
u32_t stats_gc_runs;
#endif
#if SPIFFS_CACHE
// cache memory
void *cache;
// cache size
u32_t cache_size;
#if SPIFFS_CACHE_STATS
u32_t cache_hits;
u32_t cache_misses;
#endif
#endif
// check callback function
spiffs_check_callback check_cb_f;
// mounted flag
u8_t mounted;
// config magic
u32_t config_magic;
} spiffs;
/* spiffs file status struct */
typedef struct {
spiffs_obj_id obj_id;
u32_t size;
spiffs_obj_type type;
u8_t name[SPIFFS_OBJ_NAME_LEN];
} spiffs_stat;
struct spiffs_dirent {
spiffs_obj_id obj_id;
u8_t name[SPIFFS_OBJ_NAME_LEN];
spiffs_obj_type type;
u32_t size;
spiffs_page_ix pix;
};
typedef struct {
spiffs *fs;
spiffs_block_ix block;
int entry;
} spiffs_DIR;
// functions
/**
* Initializes the file system dynamic parameters and mounts the filesystem.
* If SPIFFS_USE_MAGIC is enabled the mounting may fail with SPIFFS_ERR_NOT_A_FS
* if the flash does not contain a recognizable file system.
* In this case, SPIFFS_format must be called prior to remounting.
* @param fs the file system struct
* @param config the physical and logical configuration of the file system
* @param work a memory work buffer comprising 2*config->log_page_size
* bytes used throughout all file system operations
* @param fd_space memory for file descriptors
* @param fd_space_size memory size of file descriptors
* @param cache memory for cache, may be null
* @param cache_size memory size of cache
* @param check_cb_f callback function for reporting during consistency checks
*/
s32_t SPIFFS_mount(spiffs *fs, spiffs_config *config, u8_t *work,
u8_t *fd_space, u32_t fd_space_size,
void *cache, u32_t cache_size,
spiffs_check_callback check_cb_f);
/**
* Unmounts the file system. All file handles will be flushed of any
* cached writes and closed.
* @param fs the file system struct
*/
void SPIFFS_unmount(spiffs *fs);
/**
* Creates a new file.
* @param fs the file system struct
* @param path the path of the new file
* @param mode ignored, for posix compliance
*/
s32_t SPIFFS_creat(spiffs *fs, char *path, spiffs_mode mode);
/**
* Opens/creates a file.
* @param fs the file system struct
* @param path the path of the new file
* @param flags the flags for the open command, can be combinations of
* SPIFFS_APPEND, SPIFFS_TRUNC, SPIFFS_CREAT, SPIFFS_RD_ONLY,
* SPIFFS_WR_ONLY, SPIFFS_RDWR, SPIFFS_DIRECT
* @param mode ignored, for posix compliance
*/
spiffs_file SPIFFS_open(spiffs *fs, char *path, spiffs_flags flags, spiffs_mode mode);
/**
* Opens a file by given dir entry.
* Optimization purposes, when traversing a file system with SPIFFS_readdir
* a normal SPIFFS_open would need to traverse the filesystem again to find
* the file, whilst SPIFFS_open_by_dirent already knows where the file resides.
* @param fs the file system struct
* @param path the dir entry to the file
* @param flags the flags for the open command, can be combinations of
* SPIFFS_APPEND, SPIFFS_TRUNC, SPIFFS_CREAT, SPIFFS_RD_ONLY,
* SPIFFS_WR_ONLY, SPIFFS_RDWR, SPIFFS_DIRECT.
* SPIFFS_CREAT will have no effect in this case.
* @param mode ignored, for posix compliance
*/
spiffs_file SPIFFS_open_by_dirent(spiffs *fs, struct spiffs_dirent *e, spiffs_flags flags, spiffs_mode mode);
/**
* Reads from given filehandle.
* @param fs the file system struct
* @param fh the filehandle
* @param buf where to put read data
* @param len how much to read
* @returns number of bytes read, or -1 if error
*/
s32_t SPIFFS_read(spiffs *fs, spiffs_file fh, void *buf, s32_t len);
/**
* Writes to given filehandle.
* @param fs the file system struct
* @param fh the filehandle
* @param buf the data to write
* @param len how much to write
* @returns number of bytes written, or -1 if error
*/
s32_t SPIFFS_write(spiffs *fs, spiffs_file fh, void *buf, s32_t len);
/**
* Moves the read/write file offset
* @param fs the file system struct
* @param fh the filehandle
* @param offs how much/where to move the offset
* @param whence if SPIFFS_SEEK_SET, the file offset shall be set to offset bytes
* if SPIFFS_SEEK_CUR, the file offset shall be set to its current location plus offset
* if SPIFFS_SEEK_END, the file offset shall be set to the size of the file plus offset
*/
s32_t SPIFFS_lseek(spiffs *fs, spiffs_file fh, s32_t offs, int whence);
/**
* Removes a file by path
* @param fs the file system struct
* @param path the path of the file to remove
*/
s32_t SPIFFS_remove(spiffs *fs, char *path);
/**
* Removes a file by filehandle
* @param fs the file system struct
* @param fh the filehandle of the file to remove
*/
s32_t SPIFFS_fremove(spiffs *fs, spiffs_file fh);
/**
* Gets file status by path
* @param fs the file system struct
* @param path the path of the file to stat
* @param s the stat struct to populate
*/
s32_t SPIFFS_stat(spiffs *fs, char *path, spiffs_stat *s);
/**
* Gets file status by filehandle
* @param fs the file system struct
* @param fh the filehandle of the file to stat
* @param s the stat struct to populate
*/
s32_t SPIFFS_fstat(spiffs *fs, spiffs_file fh, spiffs_stat *s);
/**
* Flushes all pending write operations from cache for given file
* @param fs the file system struct
* @param fh the filehandle of the file to flush
*/
s32_t SPIFFS_fflush(spiffs *fs, spiffs_file fh);
/**
* Closes a filehandle. If there are pending write operations, these are finalized before closing.
* @param fs the file system struct
* @param fh the filehandle of the file to close
*/
void SPIFFS_close(spiffs *fs, spiffs_file fh);
/**
* Renames a file
* @param fs the file system struct
* @param old path of file to rename
* @param newPath new path of file
*/
s32_t SPIFFS_rename(spiffs *fs, char *old, char *newPath);
/**
* Returns last error of last file operation.
* @param fs the file system struct
*/
s32_t SPIFFS_errno(spiffs *fs);
/**
* Clears last error.
* @param fs the file system struct
*/
void SPIFFS_clearerr(spiffs *fs);
/**
* Opens a directory stream corresponding to the given name.
* The stream is positioned at the first entry in the directory.
* On hydrogen builds the name argument is ignored as hydrogen builds always correspond
* to a flat file structure - no directories.
* @param fs the file system struct
* @param name the name of the directory
* @param d pointer the directory stream to be populated
*/
spiffs_DIR *SPIFFS_opendir(spiffs *fs, char *name, spiffs_DIR *d);
/**
* Closes a directory stream
* @param d the directory stream to close
*/
s32_t SPIFFS_closedir(spiffs_DIR *d);
/**
* Reads a directory into given spifs_dirent struct.
* @param d pointer to the directory stream
* @param e the dirent struct to be populated
* @returns null if error or end of stream, else given dirent is returned
*/
struct spiffs_dirent *SPIFFS_readdir(spiffs_DIR *d, struct spiffs_dirent *e);
/**
* Runs a consistency check on given filesystem.
* @param fs the file system struct
*/
s32_t SPIFFS_check(spiffs *fs);
/**
* Searches for a block with only deleted entries. If found, it is erased.
* @param fs the file system struct
*/
s32_t SPIFFS_erase_deleted_block(spiffs *fs);
/**
* Returns number of total bytes available and number of used bytes.
* This is an estimation, and depends on if there a many files with little
* data or few files with much data.
* NB: If used number of bytes exceeds total bytes, a SPIFFS_check should
* run. This indicates a power loss in midst of things. In worst case
* (repeated powerlosses in mending or gc) you might have to delete some files.
*
* @param fs the file system struct
* @param total total number of bytes in filesystem
* @param used used number of bytes in filesystem
*/
s32_t SPIFFS_info(spiffs *fs, u32_t *total, u32_t *used);
/**
* Formats the entire file system. All data will be lost.
* The filesystem must not be mounted when calling this.
*
* NB: formatting is awkward. Due to backwards compatibility, SPIFFS_mount
* MUST be called prior to formatting in order to configure the filesystem.
* If SPIFFS_mount succeeds, SPIFFS_unmount must be called before calling
* SPIFFS_format.
* If SPIFFS_mount fails, SPIFFS_format can be called directly without calling
* SPIFFS_unmount first.
*
* @param fs the file system struct
*/
s32_t SPIFFS_format(spiffs *fs);
/**
* Returns nonzero if spiffs is mounted, or zero if unmounted.
* @param fs the file system struct
*/
u8_t SPIFFS_mounted(spiffs *fs);
/**
* Tries to find a block where most or all pages are deleted, and erase that
* block if found. Does not care for wear levelling. Will not move pages
* around.
* If parameter max_free_pages are set to 0, only blocks with only deleted
* pages will be selected.
*
* NB: the garbage collector is automatically called when spiffs needs free
* pages. The reason for this function is to give possibility to do background
* tidying when user knows the system is idle.
*
* Use with care.
*
* Setting max_free_pages to anything larger than zero will eventually wear
* flash more as a block containing free pages can be erased.
*
* Will set err_no to SPIFFS_OK if a block was found and erased,
* SPIFFS_ERR_NO_DELETED_BLOCK if no matching block was found,
* or other error.
*
* @param fs the file system struct
* @param max_free_pages maximum number allowed free pages in block
*/
s32_t SPIFFS_gc_quick(spiffs *fs, u16_t max_free_pages);
/**
* Will try to make room for given amount of bytes in the filesystem by moving
* pages and erasing blocks.
* If it is physically impossible, err_no will be set to SPIFFS_ERR_FULL. If
* there already is this amount (or more) of free space, SPIFFS_gc will
* silently return. It is recommended to call SPIFFS_info before invoking
* this method in order to determine what amount of bytes to give.
*
* NB: the garbage collector is automatically called when spiffs needs free
* pages. The reason for this function is to give possibility to do background
* tidying when user knows the system is idle.
*
* Use with care.
*
* @param fs the file system struct
* @param size amount of bytes that should be freed
*/
s32_t SPIFFS_gc(spiffs *fs, u32_t size);
#if SPIFFS_TEST_VISUALISATION
/**
* Prints out a visualization of the filesystem.
* @param fs the file system struct
*/
s32_t SPIFFS_vis(spiffs *fs);
#endif
#if SPIFFS_BUFFER_HELP
/**
* Returns number of bytes needed for the filedescriptor buffer given
* amount of file descriptors.
*/
u32_t SPIFFS_buffer_bytes_for_filedescs(spiffs *fs, u32_t num_descs);
#if SPIFFS_CACHE
/**
* Returns number of bytes needed for the cache buffer given
* amount of cache pages.
*/
u32_t SPIFFS_buffer_bytes_for_cache(spiffs *fs, u32_t num_pages);
#endif
#endif
#if SPIFFS_CACHE
#endif
void myspiffs_mount();
void myspiffs_unmount();
int myspiffs_open(const char *name, int flags);
int myspiffs_close( int fd );
size_t myspiffs_write( int fd, const void* ptr, size_t len );
size_t myspiffs_read( int fd, void* ptr, size_t len);
int myspiffs_lseek( int fd, int off, int whence );
int myspiffs_eof( int fd );
int myspiffs_tell( int fd );
int myspiffs_getc( int fd );
int myspiffs_ungetc( int c, int fd );
int myspiffs_flush( int fd );
int myspiffs_error( int fd );
void myspiffs_clearerr( int fd );
int myspiffs_check( void );
int myspiffs_rename( const char *old, const char *newname );
size_t myspiffs_size( int fd );
int myspiffs_format (void);
s32_t SPIFFS_eof(spiffs *fs, spiffs_file fh);
s32_t SPIFFS_tell(spiffs *fs, spiffs_file fh);
s32_t SPIFFS_size(spiffs *fs, spiffs_file fh);
#if defined(__cplusplus)
}
#endif
#endif /* SPIFFS_H_ */
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