From: acevest Date: Sat, 27 Nov 2021 05:45:49 +0000 (+0800) Subject: remove bak.ext2.h; mov ext2.h from include to fs;add vfs.h vfs.c X-Git-Url: http://zhaoyanbai.com/repos/?a=commitdiff_plain;h=b6826658a77b6adc6dd79043112e8cf4769435c4;p=kernel.git remove bak.ext2.h; mov ext2.h from include to fs;add vfs.h vfs.c --- diff --git a/Makefile b/Makefile index 3ca64e0..38491d9 100644 --- a/Makefile +++ b/Makefile @@ -11,7 +11,7 @@ KERNELBIN = KERNEL.BIN LINKSCRIPT = scripts/link.ld SRC_DIRS = boot mm lib fs kernel drivers -INC_DIRS = include drivers boot mm +INC_DIRS = include drivers boot mm fs CFLAGS += ${INC_DIRS:%=-I%} diff --git a/include/ext2.h b/fs/ext2.h similarity index 100% rename from include/ext2.h rename to fs/ext2.h diff --git a/fs/vfs.c b/fs/vfs.c new file mode 100644 index 0000000..54eaf8a --- /dev/null +++ b/fs/vfs.c @@ -0,0 +1,12 @@ +/* + * ------------------------------------------------------------------------ + * File Name: vfs.c + * Author: Zhao Yanbai + * 2021-11-27 11:59:30 Saturday CST + * Description: none + * ------------------------------------------------------------------------ + */ + +#include + +vfs_sb_t *root_sb = 0; \ No newline at end of file diff --git a/fs/vfs.h b/fs/vfs.h new file mode 100644 index 0000000..9242a33 --- /dev/null +++ b/fs/vfs.h @@ -0,0 +1,50 @@ +/* + * ------------------------------------------------------------------------ + * File Name: vfs.h + * Author: Zhao Yanbai + * 2021-11-27 11:59:27 Saturday CST + * Description: none + * ------------------------------------------------------------------------ + */ + +#pragma once + +typedef struct vfs_dentry vfs_dentry_t; + +typedef struct vfs_sb_operations vfs_sb_operations_t; +typedef struct vfs_inode_operations vfs_inode_operations_t; +typedef struct vfs_dentry_operations vfs_dentry_operations_t; + +// super block +typedef struct vfs_sb { + // + vfs_dentry_t *root; + void *private; + vfs_sb_operations_t *sb_ops; +} vfs_sb_t; + +typedef struct vfs_inode { + // + vfs_sb_t *sb; + void *private; + vfs_inode_operations_t *i_ops; +} vfs_inode_t; + +struct vfs_dentry { + // + vfs_dentry_operations_t *d_ops; +}; + +struct vfs_sb_operations { + // +}; + +struct vfs_inode_operations { + // +}; + +struct vfs_dentry_operations { + // +}; + +extern vfs_sb_t *root_sb; \ No newline at end of file diff --git a/include/bak.ext2.h b/include/bak.ext2.h deleted file mode 100644 index 0bbe30f..0000000 --- a/include/bak.ext2.h +++ /dev/null @@ -1,225 +0,0 @@ -/* - *-------------------------------------------------------------------------- - * File Name: ext2.h - * - * Description: 当然.几乎来自Linux 内核. - * - * - * Author: Zhao Yanbai [zhaoyanbai@126.com] - * - * Version: 1.0 - * Create Date: Fri Dec 26 22:43:43 2008 - * Last Update: Fri Dec 26 22:43:43 2008 - * - *-------------------------------------------------------------------------- - */ - -#ifndef _EXT2_H -#define _EXT2_H - -#include - -#define EXT2_BAD_INO 1 -#define EXT2_ROOT_INO 2 -#define EXT2_BOOT_LOADER_INO 5 -#define EXT2_UNDEL_DIR_INO 6 - -#define EXT2_MIN_BLOCK_SIZE 1024 -#define EXT2_MAX_BLOCK_SIZE 4096 -#define EXT2_MIN_BLOCK_LOG_SIZE 10 - -#define EXT2_SB (&ext2_sb) -#define EXT2_SECT (ext2_start_sect) - -#ifndef EXT2_SB -#error "Please define EXT2_SB" -#endif - -#define EXT2_BLOCK_SIZE (EXT2_MIN_BLOCK_SIZE << (EXT2_SB)->s_log_block_size) - -#define EXT2_SECT_PER_BLOCK (EXT2_BLOCK_SIZE / 512) - -#define EXT2_BLOCK_SIZE_BITS ((EXT2_SB)->s_log_block_size + 10) -#define EXT2_INODE_SIZE ((EXT2_SB)->s_inode_size) -#define EXT2_INODES_PER_BLOCK (EXT2_BLOCK_SIZE / EXT2_INODE_SIZE) -#define EXT2_FIRST_INO ((EXT2_SB)->s_first_ino) -/* - * 表示第一个块号. 因为SuperBlock总是从第三个扇区开始的所以如果块的大小 - * 是1024的话SuperBlock的块号是1.而如果块的大小是2048或4096则SuperBlock - * 的块号是0 - */ -#define EXT2_FIRST_BLOCK_ID (EXT2_BLOCK_SIZE == 1024) - -#define EXT2_BLOCKS_PER_GROUP ((EXT2_SB)->s_blocks_per_group) -#define EXT2_DESC_PER_BLOCK ((EXT2_SB)->s_desc_per_block) -#define EXT2_INODES_PER_GROUP ((EXT2_SB)->s_inodes_per_group) -#define EXT2_INODES_COUNT ((EXT2_SB)->s_inodes_count) - -/* - * ------------------------------------------------------------------------ - * EXT2 FILE SYSTEM PART - * ------------------------------------------------------------------------ - */ -typedef struct ext2_superblock { - /* - u32 s_inodes_count; - u32 s_blocks_count; - u32 s_r_blocks_count; - u32 s_free_blocks_count; - u32 s_free_inodes_count; - u32 s_first_data_block; - u32 s_log_block_size; - u32 s_log_frag_size; - u32 s_blocks_per_group; - u32 s_frags_per_group; - u32 s_inodes_per_group; - - // So Much Items - // I do not want to write down ... -*/ - u32 s_inodes_count; /* Inodes count */ - u32 s_blocks_count; /* Blocks count */ - u32 s_r_blocks_count; /* Reserved blocks count */ - u32 s_free_blocks_count; /* Free blocks count */ - u32 s_free_inodes_count; /* Free inodes count */ - u32 s_first_data_block; /* First Data Block */ - u32 s_log_block_size; /* Block size */ - u32 s_log_frag_size; /* Fragment size */ - u32 s_blocks_per_group; /* # Blocks per group */ - u32 s_frags_per_group; /* # Fragments per group */ - u32 s_inodes_per_group; /* # Inodes per group */ - u32 s_mtime; /* Mount time */ - u32 s_wtime; /* Write time */ - u16 s_mnt_count; /* Mount count */ - u16 s_max_mnt_count; /* Maximal mount count */ - u16 s_magic; /* Magic signature */ - u16 s_state; /* File system state */ - u16 s_errors; /* Behaviour when detecting errors */ - u16 s_minor_rev_level; /* minor revision level */ - u32 s_lastcheck; /* time of last check */ - u32 s_checkinterval; /* max. time between checks */ - u32 s_creator_os; /* OS */ - u32 s_rev_level; /* Revision level */ - u16 s_def_resuid; /* Default uid for reserved blocks */ - u16 s_def_resgid; /* Default gid for reserved blocks */ - /* - * These fields are for EXT2_DYNAMIC_REV superblocks only. - * - * Note: the difference between the compatible feature set and - * the incompatible feature set is that if there is a bit set - * in the incompatible feature set that the kernel doesn't - * know about, it should refuse to mount the filesystem. - * - * e2fsck's requirements are more strict; if it doesn't know - * about a feature in either the compatible or incompatible - * feature set, it must abort and not try to meddle with - * things it doesn't understand... - */ - u32 s_first_ino; /* First non-reserved inode */ - u16 s_inode_size; /* size of inode structure */ - u16 s_block_group_nr; /* block group # of this superblock */ - u32 s_feature_compat; /* compatible feature set */ - u32 s_feature_incompat; /* incompatible feature set */ - u32 s_feature_ro_compat; /* readonly-compatible feature set */ - u8 s_uuid[16]; /* 128-bit uuid for volume */ - char s_volume_name[16]; /* volume name */ - char s_last_mounted[64]; /* directory where last mounted */ - u32 s_algorithm_usage_bitmap; /* For compression */ - /* - * Performance hints. Directory preallocation should only - * happen if the EXT2_COMPAT_PREALLOC flag is on. - */ - u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ - u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ - u16 s_padding1; - /* - * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set. - */ - u8 s_journal_uuid[16]; /* uuid of journal superblock */ - u32 s_journal_inum; /* inode number of journal file */ - u32 s_journal_dev; /* device number of journal file */ - u32 s_last_orphan; /* start of list of inodes to delete */ - u32 s_hash_seed[4]; /* HTREE hash seed */ - u8 s_def_hash_version; /* Default hash version to use */ - u8 s_reserved_char_pad; - u16 s_reserved_word_pad; - u32 s_default_mount_opts; - u32 s_first_meta_bg; /* First metablock block group */ - u32 s_reserved[190]; /* Padding to the end of the block */ -} SuperBlock, *pSuperBlock; - -extern SuperBlock ext2_sb; - -typedef struct ext2_group_descriptor { - u32 bg_block_bitmap; - u32 bg_inode_bitmap; - u32 bg_inode_table; - u16 bg_free_blocks_count; - u16 bg_free_inodes_count; - u16 bg_used_dirs_count; - u16 bg_pad; - u32 bg_reserved[3]; -} GroupDesc, *pGroupDesc; - -#define EXT2_NDIR_BLOCKS (12) -#define EXT2_IND_BLOCK (EXT2_NDIR_BLOCKS) -#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1) -#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1) -#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1) - -typedef struct ext2_inode { - u16 i_mode; - u16 i_uid; - u32 i_size; - u32 i_atime; - u32 i_ctime; - u32 i_mtime; - u32 i_dtime; - u16 i_gid; - u16 i_links_count; - u32 i_blocks; - u32 i_flags; - u32 i_osd1; - u32 i_block[EXT2_N_BLOCKS]; - u32 i_generation; - u32 i_file_acl; - u32 i_dir_acl; - u32 i_faddr; - u8 i_osd2[12]; -} Inode, *pInode; - -#define EXT2_NAME_LEN 255 -typedef struct ext2_dir_ent { - u32 inode; - u16 rec_len; - u8 name_len; - u8 file_type; /* 目录类型 */ - char name[EXT2_NAME_LEN]; -} DirEnt, *pDirEnt; - -/* - * Ext2 目录类型. - * 到目前为止只有低3位有效. - */ -enum { - EXT2_FT_UNKNOWN, - EXT2_FT_REG_FILE, - EXT2_FT_DIR, - EXT2_FT_CHRDEV, - EXT2_FT_BLKDEV, - EXT2_FT_FIFO, - EXT2_FT_SOCK, - EXT2_FT_SYMLINK, - EXT2_FT_MAX -}; - -#define EXT2_DIR_PAD 4 -#define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1) -#define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & ~EXT2_DIR_ROUND) -#define EXT2_MAX_REC_LEN ((1 << 16) - 1) - -extern int ext2_read_inode(unsigned int n, pInode inode); -extern int ext2_get_file_inode(const char *path, pInode inode); -extern int ext2_read_file(const pInode ino, void *buf, size_t count); - -#endif //_EXT2_H