Diff: spiffs.h

Revision:

0:bb4e812f7c97

Child:

2:de478b250060

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spiffs.h	Tue Dec 16 15:13:10 2014 +0000
@@ -0,0 +1,429 @@
+/*
+ * spiffs.h
+ *
+ *  Created on: May 26, 2013
+ *      Author: petera
+ */
+
+
+
+#ifndef SPIFFS_H_
+#define SPIFFS_H_
+
+#include "spiffs_config.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#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_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 errno;
+
+  // 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;
+} 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;
+};
+
+typedef struct {
+  spiffs *fs;
+  spiffs_block_ix block;
+  int entry;
+} spiffs_DIR;
+
+// functions
+
+/**
+ * Initializes the file system dynamic parameters and mounts the filesystem
+ * @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, const 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, const char *path, 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, const 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, const 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);
+
+/**
+ * Returns last error of last file operation.
+ * @param fs            the file system struct
+ */
+s32_t SPIFFS_errno(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, const 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);
+
+#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_CHACHE
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* SPIFFS_H_ */
\ No newline at end of file