11da177e4SLinus Torvalds #include <linux/fs.h> 21da177e4SLinus Torvalds #include <linux/pagemap.h> 31da177e4SLinus Torvalds #include <linux/minix_fs.h> 41da177e4SLinus Torvalds 51da177e4SLinus Torvalds /* 61da177e4SLinus Torvalds * change the define below to 0 if you want names > info->s_namelen chars to be 71da177e4SLinus Torvalds * truncated. Else they will be disallowed (ENAMETOOLONG). 81da177e4SLinus Torvalds */ 91da177e4SLinus Torvalds #define NO_TRUNCATE 1 101da177e4SLinus Torvalds #define INODE_VERSION(inode) minix_sb(inode->i_sb)->s_version 111da177e4SLinus Torvalds #define MINIX_V1 0x0001 /* original minix fs */ 121da177e4SLinus Torvalds #define MINIX_V2 0x0002 /* minix V2 fs */ 13939b00dfSAndries Brouwer #define MINIX_V3 0x0003 /* minix V3 fs */ 141da177e4SLinus Torvalds 151da177e4SLinus Torvalds /* 161da177e4SLinus Torvalds * minix fs inode data in memory 171da177e4SLinus Torvalds */ 181da177e4SLinus Torvalds struct minix_inode_info { 191da177e4SLinus Torvalds union { 201da177e4SLinus Torvalds __u16 i1_data[16]; 211da177e4SLinus Torvalds __u32 i2_data[16]; 221da177e4SLinus Torvalds } u; 231da177e4SLinus Torvalds struct inode vfs_inode; 241da177e4SLinus Torvalds }; 251da177e4SLinus Torvalds 261da177e4SLinus Torvalds /* 271da177e4SLinus Torvalds * minix super-block data in memory 281da177e4SLinus Torvalds */ 291da177e4SLinus Torvalds struct minix_sb_info { 301da177e4SLinus Torvalds unsigned long s_ninodes; 311da177e4SLinus Torvalds unsigned long s_nzones; 321da177e4SLinus Torvalds unsigned long s_imap_blocks; 331da177e4SLinus Torvalds unsigned long s_zmap_blocks; 341da177e4SLinus Torvalds unsigned long s_firstdatazone; 351da177e4SLinus Torvalds unsigned long s_log_zone_size; 361da177e4SLinus Torvalds unsigned long s_max_size; 371da177e4SLinus Torvalds int s_dirsize; 381da177e4SLinus Torvalds int s_namelen; 391da177e4SLinus Torvalds int s_link_max; 401da177e4SLinus Torvalds struct buffer_head ** s_imap; 411da177e4SLinus Torvalds struct buffer_head ** s_zmap; 421da177e4SLinus Torvalds struct buffer_head * s_sbh; 431da177e4SLinus Torvalds struct minix_super_block * s_ms; 441da177e4SLinus Torvalds unsigned short s_mount_state; 451da177e4SLinus Torvalds unsigned short s_version; 461da177e4SLinus Torvalds }; 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds extern struct minix_inode * minix_V1_raw_inode(struct super_block *, ino_t, struct buffer_head **); 491da177e4SLinus Torvalds extern struct minix2_inode * minix_V2_raw_inode(struct super_block *, ino_t, struct buffer_head **); 501da177e4SLinus Torvalds extern struct inode * minix_new_inode(const struct inode * dir, int * error); 511da177e4SLinus Torvalds extern void minix_free_inode(struct inode * inode); 521da177e4SLinus Torvalds extern unsigned long minix_count_free_inodes(struct minix_sb_info *sbi); 531da177e4SLinus Torvalds extern int minix_new_block(struct inode * inode); 54939b00dfSAndries Brouwer extern void minix_free_block(struct inode *inode, unsigned long block); 551da177e4SLinus Torvalds extern unsigned long minix_count_free_blocks(struct minix_sb_info *sbi); 561da177e4SLinus Torvalds extern int minix_getattr(struct vfsmount *, struct dentry *, struct kstat *); 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds extern void V1_minix_truncate(struct inode *); 591da177e4SLinus Torvalds extern void V2_minix_truncate(struct inode *); 601da177e4SLinus Torvalds extern void minix_truncate(struct inode *); 611da177e4SLinus Torvalds extern int minix_sync_inode(struct inode *); 621da177e4SLinus Torvalds extern void minix_set_inode(struct inode *, dev_t); 631da177e4SLinus Torvalds extern int V1_minix_get_block(struct inode *, long, struct buffer_head *, int); 641da177e4SLinus Torvalds extern int V2_minix_get_block(struct inode *, long, struct buffer_head *, int); 65939b00dfSAndries Brouwer extern unsigned V1_minix_blocks(loff_t, struct super_block *); 66939b00dfSAndries Brouwer extern unsigned V2_minix_blocks(loff_t, struct super_block *); 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds extern struct minix_dir_entry *minix_find_entry(struct dentry*, struct page**); 691da177e4SLinus Torvalds extern int minix_add_link(struct dentry*, struct inode*); 701da177e4SLinus Torvalds extern int minix_delete_entry(struct minix_dir_entry*, struct page*); 711da177e4SLinus Torvalds extern int minix_make_empty(struct inode*, struct inode*); 721da177e4SLinus Torvalds extern int minix_empty_dir(struct inode*); 731da177e4SLinus Torvalds extern void minix_set_link(struct minix_dir_entry*, struct page*, struct inode*); 741da177e4SLinus Torvalds extern struct minix_dir_entry *minix_dotdot(struct inode*, struct page**); 751da177e4SLinus Torvalds extern ino_t minix_inode_by_name(struct dentry*); 761da177e4SLinus Torvalds extern int minix_sync_file(struct file *, struct dentry *, int); 771da177e4SLinus Torvalds 781da177e4SLinus Torvalds extern struct inode_operations minix_file_inode_operations; 791da177e4SLinus Torvalds extern struct inode_operations minix_dir_inode_operations; 804b6f5d20SArjan van de Ven extern const struct file_operations minix_file_operations; 814b6f5d20SArjan van de Ven extern const struct file_operations minix_dir_operations; 821da177e4SLinus Torvalds extern struct dentry_operations minix_dentry_operations; 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds static inline struct minix_sb_info *minix_sb(struct super_block *sb) 851da177e4SLinus Torvalds { 861da177e4SLinus Torvalds return sb->s_fs_info; 871da177e4SLinus Torvalds } 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds static inline struct minix_inode_info *minix_i(struct inode *inode) 901da177e4SLinus Torvalds { 911da177e4SLinus Torvalds return list_entry(inode, struct minix_inode_info, vfs_inode); 921da177e4SLinus Torvalds } 93