From aa1eb39e9266c51082ed2d8744e97ad674b6496c Mon Sep 17 00:00:00 2001 From: "leleraffa97@hotmail.it" Date: Thu, 31 Aug 2017 16:56:06 +0200 Subject: File system interface Basic file system implementation Path resolution work in progress --- sw/z80/kernel/include/fs/fs.h | 80 ++++++++++++++++++++----------------------- 1 file changed, 38 insertions(+), 42 deletions(-) (limited to 'sw/z80/kernel/include/fs/fs.h') diff --git a/sw/z80/kernel/include/fs/fs.h b/sw/z80/kernel/include/fs/fs.h index 2a0e9d4..b92303d 100644 --- a/sw/z80/kernel/include/fs/fs.h +++ b/sw/z80/kernel/include/fs/fs.h @@ -1,5 +1,5 @@ -#ifndef INODE_H -#define INODE_H +#ifndef __FS_H__ +#define __FS_H__ #include "types.h" @@ -11,57 +11,53 @@ #define INODE_TYPE_FILE 0x0 #define INODE_TYPE_DIR 0x1 -#define INODE_TYPE_HLINK 0x2 -#define INODE_TYPE_SLINK 0x3 +#define INODE_TYPE_SLINK 0x2 +#define INODE_TYPE_SPECIAL 0x3 -typedef struct time_s +#define INODE_META_SIZE 8 + +/* inode basic structure */ +struct fs_inode { - struct - { - uint minutes :6; - uint hour :5; + /* inode meta data */ - } time; + uint mode :3; // chmod + uint uid :3; // chown + uint type :2; // file, dir, sym-link, special - struct - { - uint day :5; - uint month :4; - uint year :12; + time_t ctime; // creation time - } date; + uint24_t size; // inode size -} time_t; + /* data storage informations */ + /* it doesn't allocate memory, virtual size FS_BLOCKS_N */ + blk_t blocks[]; +}; -struct fs_superblock -{ - uint8_t magic; // identifier +#define FS_DEV_ROM 0x7f /* 01111111 */ +#define FS_DEV_NULL 0x80 /* 10000000 */ - uint16_t blk_size; // size of a single block - uint16_t imap_size; // quantity of inodes - uint16_t dmap_size; // quantity of blocks -} +#define FS_ROM_SPACE 0x2000 // second rom -struct fs_inode -{ - - /* inode meta data */ - uint mode :3; // chmod - uint uid :3; // chown - uint type :2; // file, dir, hard-link, sym-link +#define FS_INO_ROOT 0x0 // first inode - time_t ctime; // creation time +#define FS_INODE_ROOT(inode) {inode.dev = 0xff; inode.inode = 0x0} +#define FS_INODE_NULL(inode) {inode.dev = 0x80; inode.inode = 0x0} - /* data storage informations */ - uint24_t size; - uint16_t blocks[FS_BLOCKS_N]; +#define FS_USE_ROM(inode) inode.dev == 0x7f -} +/* get block seek in current device */ +devsize_t fs_block(blk_t block); -struct fs_inumber -{ - uint dev : 4; // device id, global in the fs - ino_t rel; // inode id relative to the volume -} +/* get common inode seek in current device */ +/* c_inode must be set first */ +/* returns seek at the beginning of blocks field */ +devsize_t fs_inode(struct fs_inode *buf); + +/* common inode for syscalls */ +extern inode_t c_inode; + +/* parse a path, absolute or relative to c_inode */ +inode_t fs_parse_path(const char *path); -#endif +#endif // __FS_H__ -- cgit v1.2.1