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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 | #ifndef _LINUX_FS_H #define _LINUX_FS_H /* * This file has definitions for some important file table * structures etc. */ #include <linux/linkage.h> #include <linux/limits.h> #include <linux/wait.h> #include <linux/types.h> #include <linux/dirent.h> #include <linux/vfs.h> #include <linux/net.h> /* * It's silly to have NR_OPEN bigger than NR_FILE, but I'll fix * that later. Anyway, now the file code is no longer dependent * on bitmaps in unsigned longs, but uses the new fd_set structure.. * * Some programs (notably those using select()) may have to be * recompiled to take full advantage of the new limits.. */ #undef NR_OPEN #define NR_OPEN 256 #define NR_INODE 2048 /* this should be bigger than NR_FILE */ #define NR_FILE 1024 /* this can well be larger on a larger system */ #define NR_SUPER 32 #define NR_HASH 997 #define NR_IHASH 131 #define NR_FILE_LOCKS 64 #define BLOCK_SIZE 1024 #define BLOCK_SIZE_BITS 10 #define MAY_EXEC 1 #define MAY_WRITE 2 #define MAY_READ 4 #define READ 0 #define WRITE 1 #define READA 2 /* read-ahead - don't pause */ #define WRITEA 3 /* "write-ahead" - silly, but somewhat useful */ extern void buffer_init(void); extern unsigned long inode_init(unsigned long start, unsigned long end); extern unsigned long file_table_init(unsigned long start, unsigned long end); #define MAJOR(a) (int)((unsigned short)(a) >> 8) #define MINOR(a) (int)((unsigned short)(a) & 0xFF) #ifndef NULL #define NULL ((void *) 0) #endif #define NIL_FILP ((struct file *)0) #define SEL_IN 1 #define SEL_OUT 2 #define SEL_EX 4 /* * These are the fs-independent mount-flags: up to 16 flags are supported */ #define MS_RDONLY 1 /* mount read-only */ #define MS_NOSUID 2 /* ignore suid and sgid bits */ #define MS_NODEV 4 /* disallow access to device special files */ #define MS_NOEXEC 8 /* disallow program execution */ #define MS_SYNC 16 /* writes are synced at once */ #define MS_REMOUNT 32 /* alter flags of a mounted FS */ /* * Flags that can be altered by MS_REMOUNT */ #define MS_RMT_MASK (MS_RDONLY) /* * Magic mount flag number. Has to be or-ed to the flag values. */ #define MS_MGC_VAL 0xC0ED0000 /* magic flag number to indicate "new" flags */ #define MS_MGC_MSK 0xffff0000 /* magic flag number mask */ /* * Note that read-only etc flags are inode-specific: setting some file-system * flags just means all the inodes inherit those flags by default. It might be * possible to overrride it sevelctively if you really wanted to with some * ioctl() that is not currently implemented. * * Exception: MS_RDONLY is always applied to the entire file system. */ #define IS_RDONLY(inode) (((inode)->i_sb) && ((inode)->i_sb->s_flags & MS_RDONLY)) #define IS_NOSUID(inode) ((inode)->i_flags & MS_NOSUID) #define IS_NODEV(inode) ((inode)->i_flags & MS_NODEV) #define IS_NOEXEC(inode) ((inode)->i_flags & MS_NOEXEC) #define IS_SYNC(inode) ((inode)->i_flags & MS_SYNC) /* the read-only stuff doesn't really belong here, but any other place is probably as bad and I don't want to create yet another include file. */ #define BLKROSET 4701 /* set device read-only (0 = read-write) */ #define BLKROGET 4702 /* get read-only status (0 = read_write) */ #define BLKRRPART 4703 /* re-read partition table */ #define BLKGETSIZE 4704 /* return device size */ #define BLKFLSBUF 4705 /* flush buffer cache */ /* These are a few other constants only used by scsi devices */ #define SCSI_IOCTL_GET_IDLUN 0x5382 /* Used to turn on and off tagged queueing for scsi devices */ #define SCSI_IOCTL_TAGGED_ENABLE 0x5383 #define SCSI_IOCTL_TAGGED_DISABLE 0x5384 #define BMAP_IOCTL 1 /* obsolete - kept for compatibility */ #define FIBMAP 1 /* bmap access */ #define FIGETBSZ 2 /* get the block size used for bmap */ /* these flags tell notify_change what is being changed */ #define NOTIFY_SIZE 1 #define NOTIFY_MODE 2 #define NOTIFY_TIME 4 #define NOTIFY_UIDGID 8 typedef char buffer_block[BLOCK_SIZE]; struct buffer_head { char * b_data; /* pointer to data block (1024 bytes) */ unsigned long b_size; /* block size */ unsigned long b_blocknr; /* block number */ dev_t b_dev; /* device (0 = free) */ unsigned short b_count; /* users using this block */ unsigned char b_uptodate; unsigned char b_dirt; /* 0-clean,1-dirty */ unsigned char b_lock; /* 0 - ok, 1 -locked */ unsigned char b_req; /* 0 if the buffer has been invalidated */ struct wait_queue * b_wait; struct buffer_head * b_prev; /* doubly linked list of hash-queue */ struct buffer_head * b_next; struct buffer_head * b_prev_free; /* doubly linked list of buffers */ struct buffer_head * b_next_free; struct buffer_head * b_this_page; /* circular list of buffers in one page */ struct buffer_head * b_reqnext; /* request queue */ }; #include <linux/pipe_fs_i.h> #include <linux/minix_fs_i.h> #include <linux/ext_fs_i.h> #include <linux/ext2_fs_i.h> #include <linux/hpfs_fs_i.h> #include <linux/msdos_fs_i.h> #include <linux/iso_fs_i.h> #include <linux/nfs_fs_i.h> #include <linux/xia_fs_i.h> #include <linux/sysv_fs_i.h> struct inode { dev_t i_dev; unsigned long i_ino; umode_t i_mode; nlink_t i_nlink; uid_t i_uid; gid_t i_gid; dev_t i_rdev; off_t i_size; time_t i_atime; time_t i_mtime; time_t i_ctime; unsigned long i_blksize; unsigned long i_blocks; struct inode_operations * i_op; struct super_block * i_sb; struct wait_queue * i_wait; struct file_lock * i_flock; struct vm_area_struct * i_mmap; struct inode * i_next, * i_prev; struct inode * i_hash_next, * i_hash_prev; struct inode * i_bound_to, * i_bound_by; struct inode * i_mount; struct socket * i_socket; unsigned short i_count; unsigned short i_flags; unsigned char i_lock; unsigned char i_dirt; unsigned char i_pipe; unsigned char i_seek; unsigned char i_update; union { struct pipe_inode_info pipe_i; struct minix_inode_info minix_i; struct ext_inode_info ext_i; struct ext2_inode_info ext2_i; struct hpfs_inode_info hpfs_i; struct msdos_inode_info msdos_i; struct iso_inode_info isofs_i; struct nfs_inode_info nfs_i; struct xiafs_inode_info xiafs_i; struct sysv_inode_info sysv_i; } u; }; struct file { mode_t f_mode; dev_t f_rdev; /* needed for /dev/tty */ off_t f_pos; unsigned short f_flags; unsigned short f_count; unsigned short f_reada; struct file *f_next, *f_prev; struct inode * f_inode; struct file_operations * f_op; }; struct file_lock { struct file_lock *fl_next; /* singly linked list */ struct task_struct *fl_owner; /* NULL if on free list, for sanity checks */ unsigned int fl_fd; /* File descriptor for this lock */ struct wait_queue *fl_wait; char fl_type; char fl_whence; off_t fl_start; off_t fl_end; }; #include <linux/minix_fs_sb.h> #include <linux/ext_fs_sb.h> #include <linux/ext2_fs_sb.h> #include <linux/hpfs_fs_sb.h> #include <linux/msdos_fs_sb.h> #include <linux/iso_fs_sb.h> #include <linux/nfs_fs_sb.h> #include <linux/xia_fs_sb.h> #include <linux/sysv_fs_sb.h> struct super_block { dev_t s_dev; unsigned long s_blocksize; unsigned char s_blocksize_bits; unsigned char s_lock; unsigned char s_rd_only; unsigned char s_dirt; struct super_operations *s_op; unsigned long s_flags; unsigned long s_magic; unsigned long s_time; struct inode * s_covered; struct inode * s_mounted; struct wait_queue * s_wait; union { struct minix_sb_info minix_sb; struct ext_sb_info ext_sb; struct ext2_sb_info ext2_sb; struct hpfs_sb_info hpfs_sb; struct msdos_sb_info msdos_sb; struct isofs_sb_info isofs_sb; struct nfs_sb_info nfs_sb; struct xiafs_sb_info xiafs_sb; struct sysv_sb_info sysv_sb; } u; }; struct file_operations { int (*lseek) (struct inode *, struct file *, off_t, int); int (*read) (struct inode *, struct file *, char *, int); int (*write) (struct inode *, struct file *, char *, int); int (*readdir) (struct inode *, struct file *, struct dirent *, int); int (*select) (struct inode *, struct file *, int, select_table *); int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned long); int (*mmap) (struct inode *, struct file *, unsigned long, size_t, int, unsigned long); int (*open) (struct inode *, struct file *); void (*release) (struct inode *, struct file *); int (*fsync) (struct inode *, struct file *); }; struct inode_operations { struct file_operations * default_file_ops; int (*create) (struct inode *,const char *,int,int,struct inode **); int (*lookup) (struct inode *,const char *,int,struct inode **); int (*link) (struct inode *,struct inode *,const char *,int); int (*unlink) (struct inode *,const char *,int); int (*symlink) (struct inode *,const char *,int,const char *); int (*mkdir) (struct inode *,const char *,int,int); int (*rmdir) (struct inode *,const char *,int); int (*mknod) (struct inode *,const char *,int,int,int); int (*rename) (struct inode *,const char *,int,struct inode *,const char *,int); int (*readlink) (struct inode *,char *,int); int (*follow_link) (struct inode *,struct inode *,int,int,struct inode **); int (*bmap) (struct inode *,int); void (*truncate) (struct inode *); int (*permission) (struct inode *, int); }; struct super_operations { void (*read_inode) (struct inode *); int (*notify_change) (int flags, struct inode *); void (*write_inode) (struct inode *); void (*put_inode) (struct inode *); void (*put_super) (struct super_block *); void (*write_super) (struct super_block *); void (*statfs) (struct super_block *, struct statfs *); int (*remount_fs) (struct super_block *, int *); }; struct file_system_type { struct super_block *(*read_super) (struct super_block *, void *, int); char *name; int requires_dev; }; #ifdef __KERNEL__ asmlinkage int sys_open(const char *, int, int); asmlinkage int sys_close(unsigned int); /* yes, it's really unsigned */ extern int getname(const char * filename, char **result); extern void putname(char * name); extern int register_blkdev(unsigned int, const char *, struct file_operations *); extern int blkdev_open(struct inode * inode, struct file * filp); extern struct file_operations def_blk_fops; extern struct inode_operations blkdev_inode_operations; extern int register_chrdev(unsigned int, const char *, struct file_operations *); extern int unregister_chrdev( unsigned int major, const char * name); extern int chrdev_open(struct inode * inode, struct file * filp); extern struct file_operations def_chr_fops; extern struct inode_operations chrdev_inode_operations; extern void init_fifo(struct inode * inode); extern struct file_operations connecting_fifo_fops; extern struct file_operations read_fifo_fops; extern struct file_operations write_fifo_fops; extern struct file_operations rdwr_fifo_fops; extern struct file_operations read_pipe_fops; extern struct file_operations write_pipe_fops; extern struct file_operations rdwr_pipe_fops; extern struct file_system_type *get_fs_type(char *name); extern int fs_may_mount(dev_t dev); extern int fs_may_umount(dev_t dev, struct inode * mount_root); extern int fs_may_remount_ro(dev_t dev); extern struct file *first_file; extern int nr_files; extern struct super_block super_blocks[NR_SUPER]; extern int shrink_buffers(unsigned int priority); extern int nr_buffers; extern int buffermem; extern int nr_buffer_heads; extern void check_disk_change(dev_t dev); extern void invalidate_inodes(dev_t dev); extern void invalidate_buffers(dev_t dev); extern int floppy_change(struct buffer_head * first_block); extern void sync_inodes(dev_t dev); extern void sync_dev(dev_t dev); extern int fsync_dev(dev_t dev); extern void sync_supers(dev_t dev); extern int bmap(struct inode * inode,int block); extern int notify_change(int flags, struct inode * inode); extern int namei(const char * pathname, struct inode ** res_inode); extern int lnamei(const char * pathname, struct inode ** res_inode); extern int permission(struct inode * inode,int mask); extern int open_namei(const char * pathname, int flag, int mode, struct inode ** res_inode, struct inode * base); extern int do_mknod(const char * filename, int mode, dev_t dev); extern void iput(struct inode * inode); extern struct inode * __iget(struct super_block * sb,int nr,int crsmnt); extern struct inode * iget(struct super_block * sb,int nr); extern struct inode * get_empty_inode(void); extern void insert_inode_hash(struct inode *); extern void clear_inode(struct inode *); extern struct inode * get_pipe_inode(void); extern struct file * get_empty_filp(void); extern struct buffer_head * get_hash_table(dev_t dev, int block, int size); extern struct buffer_head * getblk(dev_t dev, int block, int size); extern void ll_rw_block(int rw, int nr, struct buffer_head * bh[]); extern void ll_rw_page(int rw, int dev, int nr, char * buffer); extern void ll_rw_swap_file(int rw, int dev, unsigned int *b, int nb, char *buffer); extern void brelse(struct buffer_head * buf); extern void set_blocksize(dev_t dev, int size); extern struct buffer_head * bread(dev_t dev, int block, int size); extern unsigned long bread_page(unsigned long addr,dev_t dev,int b[],int size,int prot); extern struct buffer_head * breada(dev_t dev,int block,...); extern void put_super(dev_t dev); extern dev_t ROOT_DEV; extern void mount_root(void); extern int char_read(struct inode *, struct file *, char *, int); extern int block_read(struct inode *, struct file *, char *, int); extern int read_ahead[]; extern int char_write(struct inode *, struct file *, char *, int); extern int block_write(struct inode *, struct file *, char *, int); extern int generic_mmap(struct inode *, struct file *, unsigned long, size_t, int, unsigned long); extern int block_fsync(struct inode *, struct file *); extern int file_fsync(struct inode *, struct file *); #endif /* __KERNEL__ */ #endif |