150 lines
4.2 KiB
C
150 lines
4.2 KiB
C
/*
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* Name : qnx4_fs.h
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* Author : Richard Frowijn
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* Function : qnx4 global filesystem definitions
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* History : 23-03-1998 created
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*/
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#ifndef _LINUX_QNX4_FS_H
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#define _LINUX_QNX4_FS_H
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#include <linux/types.h>
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#include <linux/qnxtypes.h>
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#include <linux/magic.h>
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#define QNX4_ROOT_INO 1
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#define QNX4_MAX_XTNTS_PER_XBLK 60
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/* for di_status */
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#define QNX4_FILE_USED 0x01
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#define QNX4_FILE_MODIFIED 0x02
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#define QNX4_FILE_BUSY 0x04
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#define QNX4_FILE_LINK 0x08
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#define QNX4_FILE_INODE 0x10
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#define QNX4_FILE_FSYSCLEAN 0x20
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#define QNX4_I_MAP_SLOTS 8
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#define QNX4_Z_MAP_SLOTS 64
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#define QNX4_VALID_FS 0x0001 /* Clean fs. */
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#define QNX4_ERROR_FS 0x0002 /* fs has errors. */
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#define QNX4_BLOCK_SIZE 0x200 /* blocksize of 512 bytes */
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#define QNX4_BLOCK_SIZE_BITS 9 /* blocksize shift */
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#define QNX4_DIR_ENTRY_SIZE 0x040 /* dir entry size of 64 bytes */
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#define QNX4_DIR_ENTRY_SIZE_BITS 6 /* dir entry size shift */
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#define QNX4_XBLK_ENTRY_SIZE 0x200 /* xblk entry size */
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#define QNX4_INODES_PER_BLOCK 0x08 /* 512 / 64 */
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/* for filenames */
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#define QNX4_SHORT_NAME_MAX 16
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#define QNX4_NAME_MAX 48
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/*
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* This is the original qnx4 inode layout on disk.
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*/
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struct qnx4_inode_entry {
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char di_fname[QNX4_SHORT_NAME_MAX];
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qnx4_off_t di_size;
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qnx4_xtnt_t di_first_xtnt;
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__le32 di_xblk;
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__le32 di_ftime;
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__le32 di_mtime;
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__le32 di_atime;
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__le32 di_ctime;
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qnx4_nxtnt_t di_num_xtnts;
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qnx4_mode_t di_mode;
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qnx4_muid_t di_uid;
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qnx4_mgid_t di_gid;
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qnx4_nlink_t di_nlink;
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__u8 di_zero[4];
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qnx4_ftype_t di_type;
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__u8 di_status;
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};
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struct qnx4_link_info {
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char dl_fname[QNX4_NAME_MAX];
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__le32 dl_inode_blk;
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__u8 dl_inode_ndx;
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__u8 dl_spare[10];
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__u8 dl_status;
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};
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struct qnx4_xblk {
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__le32 xblk_next_xblk;
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__le32 xblk_prev_xblk;
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__u8 xblk_num_xtnts;
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__u8 xblk_spare[3];
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__le32 xblk_num_blocks;
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qnx4_xtnt_t xblk_xtnts[QNX4_MAX_XTNTS_PER_XBLK];
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char xblk_signature[8];
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qnx4_xtnt_t xblk_first_xtnt;
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};
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struct qnx4_super_block {
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struct qnx4_inode_entry RootDir;
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struct qnx4_inode_entry Inode;
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struct qnx4_inode_entry Boot;
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struct qnx4_inode_entry AltBoot;
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};
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#ifdef __KERNEL__
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#define QNX4_DEBUG 0
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#if QNX4_DEBUG
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#define QNX4DEBUG(X) printk X
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#else
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#define QNX4DEBUG(X) (void) 0
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#endif
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struct qnx4_sb_info {
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struct buffer_head *sb_buf; /* superblock buffer */
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struct qnx4_super_block *sb; /* our superblock */
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unsigned int Version; /* may be useful */
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struct qnx4_inode_entry *BitMap; /* useful */
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};
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struct qnx4_inode_info {
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struct qnx4_inode_entry raw;
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loff_t mmu_private;
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struct inode vfs_inode;
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};
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extern struct inode *qnx4_iget(struct super_block *, unsigned long);
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extern struct dentry *qnx4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd);
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extern unsigned long qnx4_count_free_blocks(struct super_block *sb);
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extern unsigned long qnx4_block_map(struct inode *inode, long iblock);
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extern struct buffer_head *qnx4_bread(struct inode *, int, int);
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extern const struct inode_operations qnx4_file_inode_operations;
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extern const struct inode_operations qnx4_dir_inode_operations;
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extern const struct file_operations qnx4_file_operations;
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extern const struct file_operations qnx4_dir_operations;
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extern int qnx4_is_free(struct super_block *sb, long block);
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extern int qnx4_set_bitmap(struct super_block *sb, long block, int busy);
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extern int qnx4_create(struct inode *inode, struct dentry *dentry, int mode, struct nameidata *nd);
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extern void qnx4_truncate(struct inode *inode);
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extern void qnx4_free_inode(struct inode *inode);
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extern int qnx4_unlink(struct inode *dir, struct dentry *dentry);
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extern int qnx4_rmdir(struct inode *dir, struct dentry *dentry);
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extern int qnx4_sync_file(struct file *file, struct dentry *dentry, int);
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extern int qnx4_sync_inode(struct inode *inode);
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static inline struct qnx4_sb_info *qnx4_sb(struct super_block *sb)
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{
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return sb->s_fs_info;
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}
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static inline struct qnx4_inode_info *qnx4_i(struct inode *inode)
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{
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return container_of(inode, struct qnx4_inode_info, vfs_inode);
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}
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static inline struct qnx4_inode_entry *qnx4_raw_inode(struct inode *inode)
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{
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return &qnx4_i(inode)->raw;
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}
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#endif /* __KERNEL__ */
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#endif
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