246 lines
10 KiB
C
246 lines
10 KiB
C
/****************************************************************************
|
|
* fs/romfs/fs_romfs.h
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you 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 __FS_ROMFS_FS_ROMFS_H
|
|
#define __FS_ROMFS_FS_ROMFS_H
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
#include <nuttx/list.h>
|
|
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
|
|
#include "inode/inode.h"
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/* Volume header (multi-byte values are big-endian) */
|
|
|
|
#define ROMFS_VHDR_ROM1FS 0 /* 0-7: "-rom1fs-" */
|
|
#define ROMFS_VHDR_SIZE 8 /* 8-11: Number of accessible bytes in this fs. */
|
|
#define ROMFS_VHDR_CHKSUM 12 /* 12-15: Checksum of the first 512 bytes. */
|
|
#define ROMFS_VHDR_VOLNAME 16 /* 16-..: Zero terminated volume name, padded to
|
|
* 16 byte boundary. */
|
|
|
|
#define ROMFS_VHDR_MAGIC "-rom1fs-"
|
|
|
|
/* File header offset (multi-byte values are big-endian) */
|
|
|
|
#define ROMFS_FHDR_NEXT 0 /* 0-3: Offset of the next file header
|
|
* (zero if no more files) */
|
|
#define ROMFS_FHDR_INFO 4 /* 4-7: Info for directories/hard links/
|
|
* devices */
|
|
#define ROMFS_FHDR_SIZE 8 /* 8-11: Size of this file in bytes */
|
|
#define ROMFS_FHDR_CHKSUM 12 /* 12-15: Checksum covering the meta data,
|
|
* including the file name, and
|
|
* padding. */
|
|
#define ROMFS_FHDR_NAME 16 /* 16-..: Zero terminated volume name, padded
|
|
* to 16 byte boundary. */
|
|
|
|
/* Bits 0-3 of the rf_next offset provide mode information. These are the
|
|
* values specified in
|
|
*/
|
|
|
|
#define RFNEXT_MODEMASK 7 /* Bits 0-2: Mode; bit 3: Executable */
|
|
#define RFNEXT_ALLMODEMASK 15 /* Bits 0-3: All mode bits */
|
|
#define RFNEXT_OFFSETMASK (~15) /* Bits n-3: Offset to next entry */
|
|
|
|
#define RFNEXT_HARDLINK 0 /* rf_info = Link destination file header */
|
|
#define RFNEXT_DIRECTORY 1 /* rf_info = First file's header */
|
|
#define RFNEXT_FILE 2 /* rf_info = Unused, must be zero */
|
|
#define RFNEXT_SOFTLINK 3 /* rf_info = Unused, must be zero */
|
|
#define RFNEXT_BLOCKDEV 4 /* rf_info = 16/16 bits major/minor number */
|
|
#define RFNEXT_CHARDEV 5 /* rf_info = 16/16 bits major/minor number */
|
|
#define RFNEXT_SOCKET 6 /* rf_info = Unused, must be zero */
|
|
#define RFNEXT_FIFO 7 /* rf_info = Unused, must be zero */
|
|
#define RFNEXT_EXEC 8 /* Modifier of RFNEXT_DIRECTORY and RFNEXT_FILE */
|
|
|
|
#define IS_MODE(rfn,mode) ((((uint32_t)(rfn))&RFNEXT_MODEMASK)==(mode))
|
|
#define IS_HARDLINK(rfn) IS_MODE(rfn,RFNEXT_HARDLINK)
|
|
#define IS_DIRECTORY(rfn) IS_MODE(rfn,RFNEXT_DIRECTORY)
|
|
#define IS_FILE(rfn) IS_MODE(rfn,RFNEXT_FILE)
|
|
#define IS_SOFTLINK(rfn) IS_MODE(rfn,RFNEXT_SOFTLINK)
|
|
#define IS_BLOCKDEV(rfn) IS_MODE(rfn,RFNEXT_BLOCKDEV)
|
|
#define IS_CHARDEV(rfn) IS_MODE(rfn,RFNEXT_CHARDEV)
|
|
#define IS_SOCKET(rfn) IS_MODE(rfn,RFNEXT_SOCKET)
|
|
#define IS_FIFO(rfn) IS_MODE(rfn,RFNEXT_FIFO)
|
|
#define IS_EXECUTABLE(rfn) (((rfn) & RFNEXT_EXEC) != 0)
|
|
|
|
/* RFNEXT_SOFTLINK, RFNEXT_BLOCKDEV, RFNEXT_CHARDEV, RFNEXT_SOCKET, and
|
|
* RFNEXT_FIFO are not presently supported in NuttX.
|
|
*/
|
|
|
|
/* Alignment macros */
|
|
|
|
#define ROMFS_ALIGNMENT 16
|
|
#define ROMFS_MAXPADDING (ROMFS_ALIGNMENT-1)
|
|
#define ROMFS_ALIGNMASK (~ROMFS_MAXPADDING)
|
|
#define ROMFS_ALIGNUP(addr) ((((uint32_t)(addr))+ROMFS_MAXPADDING)&ROMFS_ALIGNMASK)
|
|
#define ROMFS_ALIGNDOWN(addr) (((uint32_t)(addr))&ROMFS_ALIGNMASK)
|
|
|
|
/* Offset and sector conversions */
|
|
|
|
#define SEC_NDXMASK(r) ((r)->rm_hwsectorsize - 1)
|
|
#define SEC_NSECTORS(r,o) ((o) / (r)->rm_hwsectorsize)
|
|
#define SEC_ALIGN(r,o) ((o) & ~SEC_NDXMASK(r))
|
|
|
|
/* Maximum numbr of links that will be followed before we decide that there
|
|
* is a problem.
|
|
*/
|
|
|
|
#define ROMF_MAX_LINKS 64
|
|
|
|
/****************************************************************************
|
|
* Public Types
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_FS_ROMFS_WRITEABLE
|
|
/* This structure represents the spare list. An instance of this
|
|
* structure is retained as file header and file data size on each mountpoint
|
|
* that is mounted with a romfs filesystem.
|
|
*/
|
|
|
|
struct romfs_sparenode_s
|
|
{
|
|
struct list_node node;
|
|
uint32_t start;
|
|
uint32_t end;
|
|
};
|
|
#endif
|
|
|
|
/* This structure represents the overall mountpoint state. An instance of
|
|
* this structure is retained as inode private data on each mountpoint that
|
|
* is mounted with a romfs filesystem.
|
|
*/
|
|
|
|
struct romfs_file_s;
|
|
struct romfs_mountpt_s
|
|
{
|
|
FAR struct inode *rm_blkdriver; /* The block driver inode that hosts the romfs */
|
|
#ifdef CONFIG_FS_ROMFS_CACHE_NODE
|
|
FAR struct romfs_nodeinfo_s *rm_root; /* The node for root node */
|
|
#else
|
|
uint32_t rm_rootoffset; /* Saved offset to the first root directory entry */
|
|
#endif
|
|
bool rm_mounted; /* true: The file system is ready */
|
|
uint16_t rm_hwsectorsize; /* HW: Sector size reported by block driver */
|
|
rmutex_t rm_lock; /* Used to assume thread-safe access */
|
|
uint32_t rm_refs; /* The references for all files opened on this mountpoint */
|
|
uint32_t rm_hwnsectors; /* HW: The number of sectors reported by the hardware */
|
|
uint32_t rm_volsize; /* Size of the ROMFS volume */
|
|
uint32_t rm_cachesector; /* Current sector in the rm_buffer */
|
|
FAR uint8_t *rm_xipbase; /* Base address of directly accessible media */
|
|
FAR uint8_t *rm_buffer; /* Device sector buffer, allocated if rm_xipbase==0 */
|
|
FAR uint8_t *rm_devbuffer; /* Device sector buffer, allocated for write if rm_xipbase != 0 */
|
|
#ifdef CONFIG_FS_ROMFS_WRITEABLE
|
|
struct list_node rm_sparelist; /* The list of spare space */
|
|
sem_t rm_sem; /* The semaphore to assume write safe */
|
|
#endif
|
|
};
|
|
|
|
/* This structure represents on open file under the mountpoint. An instance
|
|
* of this structure is retained as struct file specific information on each
|
|
* opened file.
|
|
*/
|
|
|
|
struct romfs_file_s
|
|
{
|
|
uint32_t rf_startoffset; /* Offset to the start of the file data */
|
|
uint32_t rf_endsector; /* Last sector of the file data */
|
|
uint32_t rf_size; /* Size of the file in bytes */
|
|
uint32_t rf_cachesector; /* First sector in the rf_buffer */
|
|
uint32_t rf_ncachesector; /* Number of sectors in the rf_buffer */
|
|
FAR uint8_t *rf_buffer; /* File sector buffer, allocated if rm_xipbase==0 */
|
|
uint8_t rf_type; /* File type (for fstat()) */
|
|
char rf_path[1]; /* Path of open file */
|
|
};
|
|
|
|
struct romfs_nodeinfo_s
|
|
{
|
|
uint32_t rn_offset; /* Offset of real file header */
|
|
uint32_t rn_next; /* Offset of the next file header+flags */
|
|
uint32_t rn_size; /* Size (if file) */
|
|
#ifdef CONFIG_FS_ROMFS_CACHE_NODE
|
|
uint32_t rn_origoffset; /* Offset of origin file header */
|
|
FAR struct romfs_nodeinfo_s **rn_child; /* The node array for link to lower level */
|
|
uint16_t rn_count; /* The count of node in rn_child level */
|
|
uint8_t rn_namesize; /* The length of name of the entry */
|
|
char rn_name[1]; /* The name to the entry */
|
|
#endif
|
|
};
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
#undef EXTERN
|
|
#if defined(__cplusplus)
|
|
#define EXTERN extern "C"
|
|
extern "C"
|
|
{
|
|
#else
|
|
#define EXTERN extern
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Public Function Prototypes
|
|
****************************************************************************/
|
|
|
|
int romfs_hwread(FAR struct romfs_mountpt_s *rm, FAR uint8_t *buffer,
|
|
uint32_t sector, unsigned int nsectors);
|
|
int romfs_filecacheread(FAR struct romfs_mountpt_s *rm,
|
|
FAR struct romfs_file_s *rf, uint32_t sector);
|
|
int romfs_hwconfigure(FAR struct romfs_mountpt_s *rm);
|
|
int romfs_fsconfigure(FAR struct romfs_mountpt_s *rm, FAR const void *data);
|
|
int romfs_fileconfigure(FAR struct romfs_mountpt_s *rm,
|
|
FAR struct romfs_file_s *rf);
|
|
int romfs_checkmount(FAR struct romfs_mountpt_s *rm);
|
|
int romfs_finddirentry(FAR struct romfs_mountpt_s *rm,
|
|
FAR struct romfs_nodeinfo_s *nodeinfo,
|
|
FAR const char *path);
|
|
int romfs_parsedirentry(FAR struct romfs_mountpt_s *rm, uint32_t offset,
|
|
FAR uint32_t *poffset, FAR uint32_t *pnext,
|
|
FAR uint32_t *pinfo, FAR uint32_t *psize);
|
|
int romfs_parsefilename(FAR struct romfs_mountpt_s *rm, uint32_t offset,
|
|
FAR char *pname);
|
|
int romfs_datastart(FAR struct romfs_mountpt_s *rm,
|
|
FAR struct romfs_nodeinfo_s *nodeinfo,
|
|
FAR uint32_t *start);
|
|
#ifdef CONFIG_FS_ROMFS_CACHE_NODE
|
|
void romfs_freenode(FAR struct romfs_nodeinfo_s *node);
|
|
#endif
|
|
#ifdef CONFIG_FS_ROMFS_WRITEABLE
|
|
int romfs_mkfs(FAR struct romfs_mountpt_s *rm);
|
|
void romfs_free_sparelist(FAR struct list_node *list);
|
|
#endif
|
|
|
|
#undef EXTERN
|
|
#if defined(__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif /* __FS_ROMFS_FS_ROMFS_H */
|