diff options
Diffstat (limited to 'sw/z80/kernel/include/fs')
| -rw-r--r-- | sw/z80/kernel/include/fs/dev.h | 29 | ||||
| -rw-r--r-- | sw/z80/kernel/include/fs/dirent.h | 17 | ||||
| -rw-r--r-- | sw/z80/kernel/include/fs/fd.h | 102 | ||||
| -rw-r--r-- | sw/z80/kernel/include/fs/fdop.h | 140 | ||||
| -rw-r--r-- | sw/z80/kernel/include/fs/fs.h | 63 | ||||
| -rw-r--r-- | sw/z80/kernel/include/fs/iter.h | 17 | ||||
| -rw-r--r-- | sw/z80/kernel/include/fs/users.h | 21 |
7 files changed, 389 insertions, 0 deletions
diff --git a/sw/z80/kernel/include/fs/dev.h b/sw/z80/kernel/include/fs/dev.h new file mode 100644 index 0000000..8e550f3 --- /dev/null +++ b/sw/z80/kernel/include/fs/dev.h @@ -0,0 +1,29 @@ +#ifndef DEV_H +#define DEV_H + +#include "types.h" + +#define FS_MOUNT_LIMIT 16 + +struct fs_superblock +{ + uint8_t magic; // identifier + + size_t blk_size; // size of a single block + size_t imap_size; // quantity of inodes + size_t dmap_size; // quantity of blocks +}; + +struct fs_dev +{ + uint enabled :1; // in use + uint port_no :3; // serial port number + uint :4; + inode_t inode; // dir mounted + struct fs_superblock superblock; // block informations +}; + +/* list of devices */ +extern struct fs_dev devices[FS_MOUNT_LIMIT]; + +#endif diff --git a/sw/z80/kernel/include/fs/dirent.h b/sw/z80/kernel/include/fs/dirent.h new file mode 100644 index 0000000..2fd224a --- /dev/null +++ b/sw/z80/kernel/include/fs/dirent.h @@ -0,0 +1,17 @@ +#ifndef __DIRENT_H__ +#define __DIRENT_H__ + +#include "types.h" + +struct dirent +{ + ino_t inode; // inode referred + uint8_t name_size; // size of the name + char name[]; // name of the referred inode +}; + +/* if inode is FS_INO_NULL, then the dirent is a memory leak */ +/* Warning: dirent leaks are generated by rm or rmdir operations */ +/* Filesystem must be periodically checked and cleaned */ + +#endif // __DIRENT_H__ diff --git a/sw/z80/kernel/include/fs/fd.h b/sw/z80/kernel/include/fs/fd.h new file mode 100644 index 0000000..d2fea2a --- /dev/null +++ b/sw/z80/kernel/include/fs/fd.h @@ -0,0 +1,102 @@ +#ifndef __FD_H__ +#define __FD_H__ + +#include "types.h" + +#define FD_MAX 32 + +#define OPEN_READ 0x1 +#define OPEN_WRITE 0x2 +#define OPEN_BIN 0x4 +#define OPEN_APPEND 0x8 +#define OPEN_ERASE 0x10 +#define OPEN_DIR 0x20 +#define OPEN_LINK 0x40 + +#define LS_ALL 0x1 + +/* declare dirent, not include */ +#ifndef __DIRENT_H__ +struct dirent; +#endif + +/* set of operations callback for fd */ +struct fd_operations +{ + size_t (*readline)(inode_t, fsize_t, char *, char term); + size_t (*print)(inode_t, fsize_t, const char *); + size_t (*append)(inode_t, fsize_t*, const char *); + + size_t (*read)(inode_t, fsize_t, void *, size_t); + size_t (*write)(inode_t, fsize_t, const void *, size_t); + size_t (*bin_append)(inode_t, fsize_t*, const void *, size_t); + + size_t (*ls)(inode_t, struct dirent *, uint8_t); + size_t (*find)(inode_t, struct dirent *, const char *); + int8_t (*mkdir)(inode_t, const char *); + int8_t (*rmdir)(inode_t, const char *); + int8_t (*touch)(inode_t, const char *); + int8_t (*rm)(inode_t, const char *); + int8_t (*ln)(inode_t, const char *, const char *); + + int8_t (*special)(inode_t, void *, size_t); +}; + +/* file descriptor */ +struct file_desc +{ + inode_t inode; // inode pointed + fsize_t seek; // virtual seek + devsize_t begin; // beginning of blocks + struct fd_operations opers; // bound operations +}; + +/* bitmap of used file descriptors */ +extern struct uint8_t fd_bmap[FD_TABLE_SIZE / 8]; + +/* table of file descriptors */ +extern struct file_desc fd_table[FD_TABLE_SIZE]; + +/* returns a free file descriptor */ +int8_t __fd_new(); + +/* opens a file streaming of the cwd */ +int8_t __open_c_inode(uint8_t flags); + +/* opens a file streaming by a path */ +int8_t open(const char *path, uint8_t flags); + +/* list content of directory */ +size_t ls(int8_t fd, struct dirent *buf, uint8_t all); + +/* find name through the directory entries */ +size_t find(int8_t fd, struct dirent *buf, const char *name); + +/* creates a new directory inside fd with the specified name */ +int8_t mkdir(int8_t fd, const char *name); + +/* creates a new file inside fd with the specified name */ +int8_t touch(int8_t fd, const char *name); + +/* creates a new symlink inside fd with the specified name */ +int8_t ln(int8_t fd, const char *name); + +/* change virtual seek position of the fd */ +int8_t seek(int8_t fd, fsize_t pos); + +/* reads a string from the fd until the terminator is reached */ +size_t readline(int8_t fd, char *buf, char term); + +/* writes a string into the fd */ +int8_t print(int8_t fd, const char *str); + +/* reads n bytes from the fd */ +size_t read(int8_t fd, void *buf, size_t n); + +/* writes n bytes into the fd */ +int8_t write(int8_t fd, const void *buf, size_t n); + +/* frees fd space */ +void close(int8_t fd); + +#endif // __FD_H__ diff --git a/sw/z80/kernel/include/fs/fdop.h b/sw/z80/kernel/include/fs/fdop.h new file mode 100644 index 0000000..d4b1b77 --- /dev/null +++ b/sw/z80/kernel/include/fs/fdop.h @@ -0,0 +1,140 @@ +#ifndef __FDOP_H__ +#define __FDOP_H__ + +#include "types.h" + +#ifndef __DIRENT_H__ +struct dirent; +#endif + +/* macro for direct binding */ + +#define FD_BIND_AS_DIR(oper) { \ + oper.ls = &as_ls; \ + oper.find = &as_find; \ + oper.mkdir = &as_mkdir; \ + oper.rmdir = &as_rmdir; \ + oper.touch = &as_touch; \ + oper.rm = &as_rm; \ + oper.ln = &as_ln; \ + } + +#define FD_BIND_SS_DIR(oper) { \ + oper.ls = &ss_ls; \ + oper.find = &ss_find; \ + oper.mkdir = &ss_mkdir; \ + oper.rmdir = &ss_rmdir; \ + oper.touch = &ss_touch; \ + oper.rm = &ss_rm; \ + oper.ln = &ss_ln; \ + } + +#define FD_BIND_AS_FILE(opers, flags) { \ + if (flags & OPEN_READ) \ + opers.readline = as_readline; \ + if (flags & OPEN_APPEND) \ + opers.append = as_append; \ + else if (flags & OPEN_WRITE) \ + opers.print = as_print; \ + } + +#define FD_BIND_SS_FILE(opers, flags) { \ + if (flags & OPEN_READ) \ + opers.readline = ss_readline; \ + if (flags & OPEN_APPEND) \ + opers.append = ss_append; \ + else if (flags & OPEN_WRITE) \ + opers.print = ss_print; \ + } + +#define FD_BIND_AS_BINFILE(opers, flags) { \ + if (flags & OPEN_READ) \ + opers.read = as_read; \ + if (flags & OPEN_APPEND) \ + opers.bin_append = as_bin_append; \ + else if (flags & OPEN_WRITE) \ + opers.write = as_write; \ + } + +#define FD_BIND_SS_BINFILE(opers, flags) { \ + if (flags & OPEN_READ) \ + opers.read = ss_read; \ + if (flags & OPEN_APPEND) \ + opers.bin_append = ss_bin_append; \ + else if (flags & OPEN_WRITE) \ + opers.write = ss_write; \ + } + +/* Set of file descriptors operations */ +/* Determines if to use the serial interface or the address space */ + +/* Address space section */ + +/* File functions */ + +size_t as_readline(inode_t inode, fsize_t seek, char *buf, char term); + +size_t as_print(inode_t inode, fsize_t seek, const char *str); + +size_t as_append(inode_t inode, fsize_t *seek_ptr, const char *str); + + +size_t as_read(inode_t inode, fsize_t seek, void *buf, size_t n); + +size_t as_write(inode_t inode, fsize_t seek, const void *buf, size_t n); + +size_t as_bin_append(inode_t inode, fsize_t *seek_ptr, const void *buf, size_t +n); + +/* Directory functions */ + +size_t as_ls(inode_t inode, struct dirent *buf, uint8_t all); + +size_t as_find(inode_t inode, struct dirent *buf, const char *name); + +int8_t as_mkdir(inode_t inode, const char *name); + +int8_t as_rmdir(inode_t inode, const char *name); + +int8_t as_touch(inode_t inode, const char *name); + +int8_t as_rm(inode_t inode, const char *name); + +int8_t as_ln(inode_t inode, const char *path, const char *name); + +/* Serial Space section */ +/* Warning, it doesn't switch to the right driver */ + +/* File functions */ + +size_t ss_readline(inode_t inode, fsize_t seek, char *buf, char term); + +size_t ss_print(inode_t inode, fsize_t seek, const char *str); + +size_t ss_append(inode_t inode, fsize_t *seek_ptr, const char *str); + + +size_t ss_read(inode_t inode, fsize_t seek, void *buf, size_t n); + +size_t ss_write(inode_t inode, fsize_t seek, const void *buf, size_t n); + +size_t ss_bin_append(inode_t inode, fsize_t *seek_ptr, const void *buf, size_t +n); + +/* Directory functions */ + +size_t ss_ls(inode_t inode, struct dirent *buf, uint8_t all); + +size_t ss_find(inode_t inode, struct dirent *buf, const char *name); + +int8_t ss_mkdir(inode_t inode, const char *name); + +int8_t ss_rmdir(inode_t inode, const char *name); + +int8_t ss_touch(inode_t inode, const char *name); + +int8_t ss_rm(inode_t inode, const char *name); + +int8_t ss_ln(inode_t, const char *path, const char *name); + +#endif // __FDOP_H__ diff --git a/sw/z80/kernel/include/fs/fs.h b/sw/z80/kernel/include/fs/fs.h new file mode 100644 index 0000000..ad20adb --- /dev/null +++ b/sw/z80/kernel/include/fs/fs.h @@ -0,0 +1,63 @@ +#ifndef __FS_H__ +#define __FS_H__ + +#include "types.h" + +#define FS_OFFSET 0x1000 + +#define FS_BLOCKS_SIZE 512 +#define FS_BLOCKS_N 8 +#define FS_BLOCKS_IND 6 + +#define INODE_TYPE_FILE 0x0 +#define INODE_TYPE_DIR 0x1 +#define INODE_TYPE_SLINK 0x2 +#define INODE_TYPE_SPECIAL 0x3 + +#define INODE_META_SIZE 8 + +/* inode basic structure */ +struct fs_inode +{ + /* inode meta data */ + + uint mode :3; // chmod + uint uid :3; // chown + uint type :2; // file, dir, sym-link, special + + time_t ctime; // creation time + + uint24_t size; // inode size + + /* data storage informations */ + /* it doesn't allocate memory, virtual size FS_BLOCKS_N */ + blk_t blocks[]; +}; + +#define FS_DEV_ROM 0x7f /* 01111111 */ +#define FS_DEV_NULL 0x80 /* 10000000 */ + +#define FS_ROM_SPACE 0x2000 // second rom + +#define FS_INO_ROOT 0x0 // first inode + +#define FS_INODE_ROOT(inode) {inode.dev = 0xff; inode.inode = 0x0} +#define FS_INODE_NULL(inode) {inode.dev = 0x80; inode.inode = 0x0} + +#define FS_USE_ROM(inode) {inode.dev == 0x7f} + +/* get block seek in current device */ +devsize_t fs_block(blk_t block); + +/* 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 // __FS_H__ diff --git a/sw/z80/kernel/include/fs/iter.h b/sw/z80/kernel/include/fs/iter.h new file mode 100644 index 0000000..41f011d --- /dev/null +++ b/sw/z80/kernel/include/fs/iter.h @@ -0,0 +1,17 @@ +#ifndef __ITER_H__ +#define __ITER_H__ + +struct inode_iter +{ + devsize_t dev_seek; /* seek position in the volume */ + devsize_t blk_end; /* end of the block */ + + int16_t blk_index; /* index of the block */ + + int8_t blk_level; /* recursion level, indirect blocks */ + + fsize_t fseek; /* virtual seek in the file */ + fsize_t size; /* file size */ +}; + +#endif // __ITER_H__ diff --git a/sw/z80/kernel/include/fs/users.h b/sw/z80/kernel/include/fs/users.h new file mode 100644 index 0000000..83980e5 --- /dev/null +++ b/sw/z80/kernel/include/fs/users.h @@ -0,0 +1,21 @@ +#ifndef USERS_H +#define USERS_H + +#include "types.h" + +#define USERS_MAX 8 +#define USER_ROOT 0 + +/* current user in use */ +extern struct fs_user c_user; + +struct fs_user +{ + char name[32]; + ino_t home; + uint8_t perm; // TODO, permissions +}; + +/* all users are in rom device */ + +#endif |