qnx4_fs.h
上传用户:szlgq88
上传日期:2009-04-28
资源大小:48287k
文件大小:4k
- /*
- * Name : qnx4_fs.h
- * Author : Richard Frowijn
- * Function : qnx4 global filesystem definitions
- * Version : 1.0.2
- * Last modified : 2000-01-31
- *
- * History : 23-03-1998 created
- */
- #ifndef _LINUX_QNX4_FS_H
- #define _LINUX_QNX4_FS_H
- #include <linux/qnxtypes.h>
- #define QNX4_ROOT_INO 1
- #define QNX4_MAX_XTNTS_PER_XBLK 60
- /* for di_status */
- #define QNX4_FILE_USED 0x01
- #define QNX4_FILE_MODIFIED 0x02
- #define QNX4_FILE_BUSY 0x04
- #define QNX4_FILE_LINK 0x08
- #define QNX4_FILE_INODE 0x10
- #define QNX4_FILE_FSYSCLEAN 0x20
- #define QNX4_I_MAP_SLOTS 8
- #define QNX4_Z_MAP_SLOTS 64
- #define QNX4_SUPER_MAGIC 0x002f /* qnx4 fs detection */
- #define QNX4_VALID_FS 0x0001 /* Clean fs. */
- #define QNX4_ERROR_FS 0x0002 /* fs has errors. */
- #define QNX4_BLOCK_SIZE 0x200 /* blocksize of 512 bytes */
- #define QNX4_BLOCK_SIZE_BITS 9 /* blocksize shift */
- #define QNX4_DIR_ENTRY_SIZE 0x040 /* dir entry size of 64 bytes */
- #define QNX4_DIR_ENTRY_SIZE_BITS 6 /* dir entry size shift */
- #define QNX4_XBLK_ENTRY_SIZE 0x200 /* xblk entry size */
- #define QNX4_INODES_PER_BLOCK 0x08 /* 512 / 64 */
- /* for filenames */
- #define QNX4_SHORT_NAME_MAX 16
- #define QNX4_NAME_MAX 48
- /*
- * This is the original qnx4 inode layout on disk.
- */
- struct qnx4_inode_entry {
- char di_fname[QNX4_SHORT_NAME_MAX];
- qnx4_off_t di_size;
- qnx4_xtnt_t di_first_xtnt;
- __le32 di_xblk;
- __le32 di_ftime;
- __le32 di_mtime;
- __le32 di_atime;
- __le32 di_ctime;
- qnx4_nxtnt_t di_num_xtnts;
- qnx4_mode_t di_mode;
- qnx4_muid_t di_uid;
- qnx4_mgid_t di_gid;
- qnx4_nlink_t di_nlink;
- __u8 di_zero[4];
- qnx4_ftype_t di_type;
- __u8 di_status;
- };
- struct qnx4_link_info {
- char dl_fname[QNX4_NAME_MAX];
- __le32 dl_inode_blk;
- __u8 dl_inode_ndx;
- __u8 dl_spare[10];
- __u8 dl_status;
- };
- struct qnx4_xblk {
- __le32 xblk_next_xblk;
- __le32 xblk_prev_xblk;
- __u8 xblk_num_xtnts;
- __u8 xblk_spare[3];
- __le32 xblk_num_blocks;
- qnx4_xtnt_t xblk_xtnts[QNX4_MAX_XTNTS_PER_XBLK];
- char xblk_signature[8];
- qnx4_xtnt_t xblk_first_xtnt;
- };
- struct qnx4_super_block {
- struct qnx4_inode_entry RootDir;
- struct qnx4_inode_entry Inode;
- struct qnx4_inode_entry Boot;
- struct qnx4_inode_entry AltBoot;
- };
- #ifdef __KERNEL__
- #define QNX4_DEBUG 0
- #if QNX4_DEBUG
- #define QNX4DEBUG(X) printk X
- #else
- #define QNX4DEBUG(X) (void) 0
- #endif
- struct qnx4_sb_info {
- struct buffer_head *sb_buf; /* superblock buffer */
- struct qnx4_super_block *sb; /* our superblock */
- unsigned int Version; /* may be useful */
- struct qnx4_inode_entry *BitMap; /* useful */
- };
- struct qnx4_inode_info {
- struct qnx4_inode_entry raw;
- loff_t mmu_private;
- struct inode vfs_inode;
- };
- extern struct dentry *qnx4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd);
- extern unsigned long qnx4_count_free_blocks(struct super_block *sb);
- extern unsigned long qnx4_block_map(struct inode *inode, long iblock);
- extern struct buffer_head *qnx4_bread(struct inode *, int, int);
- extern struct inode_operations qnx4_file_inode_operations;
- extern struct inode_operations qnx4_dir_inode_operations;
- extern struct file_operations qnx4_file_operations;
- extern struct file_operations qnx4_dir_operations;
- extern int qnx4_is_free(struct super_block *sb, long block);
- extern int qnx4_set_bitmap(struct super_block *sb, long block, int busy);
- extern int qnx4_create(struct inode *inode, struct dentry *dentry, int mode, struct nameidata *nd);
- extern void qnx4_truncate(struct inode *inode);
- extern void qnx4_free_inode(struct inode *inode);
- extern int qnx4_unlink(struct inode *dir, struct dentry *dentry);
- extern int qnx4_rmdir(struct inode *dir, struct dentry *dentry);
- extern int qnx4_sync_file(struct file *file, struct dentry *dentry, int);
- extern int qnx4_sync_inode(struct inode *inode);
- static inline struct qnx4_sb_info *qnx4_sb(struct super_block *sb)
- {
- return sb->s_fs_info;
- }
- static inline struct qnx4_inode_info *qnx4_i(struct inode *inode)
- {
- return container_of(inode, struct qnx4_inode_info, vfs_inode);
- }
- static inline struct qnx4_inode_entry *qnx4_raw_inode(struct inode *inode)
- {
- return &qnx4_i(inode)->raw;
- }
- #endif /* __KERNEL__ */
- #endif