| /* |
| * linux/fs/hpfs/hpfs_fn.h |
| * |
| * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999 |
| * |
| * function headers |
| */ |
| |
| //#define DBG |
| //#define DEBUG_LOCKS |
| |
| #include <linux/fs.h> |
| #include <linux/hpfs_fs.h> |
| #include <linux/errno.h> |
| #include <linux/slab.h> |
| #include <linux/kernel.h> |
| #include <linux/sched.h> |
| #include <linux/locks.h> |
| #include <linux/stat.h> |
| #include <linux/string.h> |
| #include <asm/bitops.h> |
| #include <asm/segment.h> |
| #include <asm/uaccess.h> |
| #include <linux/smp_lock.h> |
| |
| #include <stdarg.h> |
| |
| #include "hpfs.h" |
| |
| #define memcpy_tofs memcpy |
| #define memcpy_fromfs memcpy |
| |
| #define EIOERROR EIO |
| #define EFSERROR EPERM |
| #define EMEMERROR ENOMEM |
| |
| #define ANODE_ALLOC_FWD 512 |
| #define FNODE_ALLOC_FWD 0 |
| #define ALLOC_FWD_MIN 16 |
| #define ALLOC_FWD_MAX 128 |
| #define ALLOC_M 1 |
| #define FNODE_RD_AHEAD 16 |
| #define ANODE_RD_AHEAD 16 |
| #define DNODE_RD_AHEAD 4 |
| |
| #define FREE_DNODES_ADD 58 |
| #define FREE_DNODES_DEL 29 |
| |
| #define CHKCOND(x,y) if (!(x)) printk y |
| |
| #ifdef DBG |
| #define PRINTK(x) printk x |
| #else |
| #undef PRINTK |
| #define PRINTK(x) |
| #endif |
| |
| typedef void nonconst; /* What this is for ? */ |
| |
| /* |
| * local time (HPFS) to GMT (Unix) |
| */ |
| |
| extern inline time_t local_to_gmt(struct super_block *s, time_t t) |
| { |
| extern struct timezone sys_tz; |
| return t + sys_tz.tz_minuteswest * 60 + s->s_hpfs_timeshift; |
| } |
| |
| extern inline time_t gmt_to_local(struct super_block *s, time_t t) |
| { |
| extern struct timezone sys_tz; |
| return t - sys_tz.tz_minuteswest * 60 - s->s_hpfs_timeshift; |
| } |
| |
| /* |
| * conv= options |
| */ |
| |
| #define CONV_BINARY 0 /* no conversion */ |
| #define CONV_TEXT 1 /* crlf->newline */ |
| #define CONV_AUTO 2 /* decide based on file contents */ |
| |
| /* Four 512-byte buffers and the 2k block obtained by concatenating them */ |
| |
| struct quad_buffer_head { |
| struct buffer_head *bh[4]; |
| void *data; |
| }; |
| |
| /* The b-tree down pointer from a dir entry */ |
| |
| extern inline dnode_secno de_down_pointer (struct hpfs_dirent *de) |
| { |
| CHKCOND(de->down,("HPFS: de_down_pointer: !de->down\n")); |
| return *(dnode_secno *) ((void *) de + de->length - 4); |
| } |
| |
| /* The first dir entry in a dnode */ |
| |
| extern inline struct hpfs_dirent *dnode_first_de (struct dnode *dnode) |
| { |
| return (void *) dnode->dirent; |
| } |
| |
| /* The end+1 of the dir entries */ |
| |
| extern inline struct hpfs_dirent *dnode_end_de (struct dnode *dnode) |
| { |
| CHKCOND(dnode->first_free>=0x14 && dnode->first_free<=0xa00,("HPFS: dnode_end_de: dnode->first_free = %d\n",(int)dnode->first_free)); |
| return (void *) dnode + dnode->first_free; |
| } |
| |
| /* The dir entry after dir entry de */ |
| |
| extern inline struct hpfs_dirent *de_next_de (struct hpfs_dirent *de) |
| { |
| CHKCOND(de->length>=0x20 && de->length<0x800,("HPFS: de_next_de: de->length = %d\n",(int)de->length)); |
| return (void *) de + de->length; |
| } |
| |
| extern inline struct extended_attribute *fnode_ea(struct fnode *fnode) |
| { |
| return (struct extended_attribute *)((char *)fnode + fnode->ea_offs); |
| } |
| |
| extern inline struct extended_attribute *fnode_end_ea(struct fnode *fnode) |
| { |
| return (struct extended_attribute *)((char *)fnode + fnode->ea_offs + fnode->ea_size_s); |
| } |
| |
| extern inline struct extended_attribute *next_ea(struct extended_attribute *ea) |
| { |
| return (struct extended_attribute *)((char *)ea + 5 + ea->namelen + ea->valuelen); |
| } |
| |
| extern inline secno ea_sec(struct extended_attribute *ea) |
| { |
| return *(secno *)((char *)ea + 9 + ea->namelen); |
| } |
| |
| extern inline secno ea_len(struct extended_attribute *ea) |
| { |
| return *(secno *)((char *)ea + 5 + ea->namelen); |
| } |
| |
| extern inline char *ea_data(struct extended_attribute *ea) |
| { |
| return (char *)((char *)ea + 5 + ea->namelen); |
| } |
| |
| extern inline unsigned de_size(int namelen, secno down_ptr) |
| { |
| return ((0x1f + namelen + 3) & ~3) + (down_ptr ? 4 : 0); |
| } |
| |
| extern inline void copy_de(struct hpfs_dirent *dst, struct hpfs_dirent *src) |
| { |
| int a = dst->down; |
| int n = dst->not_8x3; |
| if (!dst || !src) return; |
| memcpy((char *)dst + 2, (char *)src + 2, 28); |
| dst->down = a; |
| dst->not_8x3 = n; |
| } |
| |
| extern inline unsigned tstbits(unsigned *bmp, unsigned b, unsigned n) |
| { |
| int i; |
| if ((b >= 0x4000) || (b + n - 1 >= 0x4000)) return n; |
| if (!((bmp[(b & 0x3fff) >> 5] >> (b & 0x1f)) & 1)) return 1; |
| for (i = 1; i < n; i++) |
| if (/*b+i < 0x4000 &&*/ !((bmp[((b+i) & 0x3fff) >> 5] >> ((b+i) & 0x1f)) & 1)) |
| return i + 1; |
| return 0; |
| } |
| |
| /* alloc.c */ |
| |
| int hpfs_chk_sectors(struct super_block *, secno, int, char *); |
| secno hpfs_alloc_sector(struct super_block *, secno, unsigned, int, int); |
| int hpfs_alloc_if_possible_nolock(struct super_block *, secno); |
| int hpfs_alloc_if_possible(struct super_block *, secno); |
| void hpfs_free_sectors(struct super_block *, secno, unsigned); |
| int hpfs_check_free_dnodes(struct super_block *, int); |
| void hpfs_free_dnode(struct super_block *, secno); |
| struct dnode *hpfs_alloc_dnode(struct super_block *, secno, dnode_secno *, struct quad_buffer_head *, int); |
| struct fnode *hpfs_alloc_fnode(struct super_block *, secno, fnode_secno *, struct buffer_head **); |
| struct anode *hpfs_alloc_anode(struct super_block *, secno, anode_secno *, struct buffer_head **); |
| |
| /* anode.c */ |
| |
| secno hpfs_bplus_lookup(struct super_block *, struct inode *, struct bplus_header *, unsigned, struct buffer_head *); |
| secno hpfs_add_sector_to_btree(struct super_block *, secno, int, unsigned); |
| void hpfs_remove_btree(struct super_block *, struct bplus_header *); |
| int hpfs_ea_read(struct super_block *, secno, int, unsigned, unsigned, char *); |
| int hpfs_ea_write(struct super_block *, secno, int, unsigned, unsigned, char *); |
| void hpfs_ea_remove(struct super_block *, secno, int, unsigned); |
| void hpfs_truncate_btree(struct super_block *, secno, int, unsigned); |
| void hpfs_remove_fnode(struct super_block *, fnode_secno fno); |
| |
| /* buffer.c */ |
| |
| void hpfs_lock_creation(struct super_block *); |
| void hpfs_unlock_creation(struct super_block *); |
| void hpfs_lock_iget(struct super_block *, int); |
| void hpfs_unlock_iget(struct super_block *); |
| void hpfs_lock_inode(struct inode *); |
| void hpfs_unlock_inode(struct inode *); |
| void hpfs_lock_2inodes(struct inode *, struct inode *); |
| void hpfs_unlock_2inodes(struct inode *, struct inode *); |
| void hpfs_lock_3inodes(struct inode *, struct inode *, struct inode *); |
| void hpfs_unlock_3inodes(struct inode *, struct inode *, struct inode *); |
| void *hpfs_map_sector(struct super_block *, unsigned, struct buffer_head **, int); |
| void *hpfs_get_sector(struct super_block *, unsigned, struct buffer_head **); |
| void *hpfs_map_4sectors(struct super_block *, unsigned, struct quad_buffer_head *, int); |
| void *hpfs_get_4sectors(struct super_block *, unsigned, struct quad_buffer_head *); |
| void hpfs_brelse4(struct quad_buffer_head *); |
| void hpfs_mark_4buffers_dirty(struct quad_buffer_head *); |
| |
| /* dentry.c */ |
| |
| void hpfs_set_dentry_operations(struct dentry *); |
| |
| /* dir.c */ |
| |
| int hpfs_dir_release(struct inode *, struct file *); |
| loff_t hpfs_dir_lseek(struct file *, loff_t, int); |
| int hpfs_readdir(struct file *, void *, filldir_t); |
| struct dentry *hpfs_lookup(struct inode *, struct dentry *); |
| |
| /* dnode.c */ |
| |
| void hpfs_add_pos(struct inode *, loff_t *); |
| void hpfs_del_pos(struct inode *, loff_t *); |
| struct hpfs_dirent *hpfs_add_de(struct super_block *, struct dnode *, unsigned char *, unsigned, secno); |
| void hpfs_delete_de(struct super_block *, struct dnode *, struct hpfs_dirent *); |
| int hpfs_add_to_dnode(struct inode *, dnode_secno, unsigned char *, unsigned, struct hpfs_dirent *, dnode_secno); |
| int hpfs_add_dirent(struct inode *, unsigned char *, unsigned, struct hpfs_dirent *, int); |
| int hpfs_remove_dirent(struct inode *, dnode_secno, struct hpfs_dirent *, struct quad_buffer_head *, int); |
| void hpfs_count_dnodes(struct super_block *, dnode_secno, int *, int *, int *); |
| dnode_secno hpfs_de_as_down_as_possible(struct super_block *, dnode_secno dno); |
| struct hpfs_dirent *map_pos_dirent(struct inode *, loff_t *, struct quad_buffer_head *); |
| struct hpfs_dirent *map_dirent(struct inode *, dnode_secno, char *, unsigned, dnode_secno *, struct quad_buffer_head *); |
| void hpfs_remove_dtree(struct super_block *, dnode_secno); |
| struct hpfs_dirent *map_fnode_dirent(struct super_block *, fnode_secno, struct fnode *, struct quad_buffer_head *); |
| |
| /* ea.c */ |
| |
| void hpfs_ea_ext_remove(struct super_block *, secno, int, unsigned); |
| int hpfs_read_ea(struct super_block *, struct fnode *, char *, char *, int); |
| char *hpfs_get_ea(struct super_block *, struct fnode *, char *, int *); |
| void hpfs_set_ea(struct inode *, struct fnode *, char *, char *, int); |
| |
| /* file.c */ |
| |
| int hpfs_file_release(struct inode *, struct file *); |
| int hpfs_open(struct inode *, struct file *); |
| int hpfs_file_fsync(struct file *, struct dentry *, int); |
| secno hpfs_bmap(struct inode *, unsigned); |
| void hpfs_truncate(struct inode *); |
| int hpfs_get_block(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create); |
| ssize_t hpfs_file_write(struct file *file, const char *buf, size_t count, loff_t *ppos); |
| |
| /* inode.c */ |
| |
| void hpfs_read_inode(struct inode *); |
| void hpfs_write_inode_ea(struct inode *, struct fnode *); |
| void hpfs_write_inode(struct inode *); |
| void hpfs_write_inode_nolock(struct inode *); |
| int hpfs_notify_change(struct dentry *, struct iattr *); |
| void hpfs_write_if_changed(struct inode *); |
| void hpfs_delete_inode(struct inode *); |
| |
| /* map.c */ |
| |
| unsigned *hpfs_map_dnode_bitmap(struct super_block *, struct quad_buffer_head *); |
| unsigned *hpfs_map_bitmap(struct super_block *, unsigned, struct quad_buffer_head *, char *); |
| char *hpfs_load_code_page(struct super_block *, secno); |
| secno *hpfs_load_bitmap_directory(struct super_block *, secno bmp); |
| struct fnode *hpfs_map_fnode(struct super_block *s, ino_t, struct buffer_head **); |
| struct anode *hpfs_map_anode(struct super_block *s, anode_secno, struct buffer_head **); |
| struct dnode *hpfs_map_dnode(struct super_block *s, dnode_secno, struct quad_buffer_head *); |
| dnode_secno hpfs_fnode_dno(struct super_block *s, ino_t ino); |
| |
| /* name.c */ |
| |
| unsigned char hpfs_upcase(unsigned char *, unsigned char); |
| int hpfs_chk_name(unsigned char *, unsigned *); |
| char *hpfs_translate_name(struct super_block *, unsigned char *, unsigned, int, int); |
| int hpfs_compare_names(struct super_block *, unsigned char *, unsigned, unsigned char *, unsigned, int); |
| int hpfs_is_name_long(unsigned char *, unsigned); |
| void hpfs_adjust_length(unsigned char *, unsigned *); |
| void hpfs_decide_conv(struct inode *, unsigned char *, unsigned); |
| |
| /* namei.c */ |
| |
| int hpfs_mkdir(struct inode *, struct dentry *, int); |
| int hpfs_create(struct inode *, struct dentry *, int); |
| int hpfs_mknod(struct inode *, struct dentry *, int, int); |
| int hpfs_symlink(struct inode *, struct dentry *, const char *); |
| int hpfs_unlink(struct inode *, struct dentry *); |
| int hpfs_rmdir(struct inode *, struct dentry *); |
| int hpfs_symlink_readpage(struct file *, struct page *); |
| int hpfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *); |
| |
| /* super.c */ |
| |
| void hpfs_error(struct super_block *, char *, ...); |
| int hpfs_stop_cycles(struct super_block *, int, int *, int *, char *); |
| int hpfs_remount_fs(struct super_block *, int *, char *); |
| void hpfs_put_super(struct super_block *); |
| unsigned hpfs_count_one_bitmap(struct super_block *, secno); |
| int hpfs_statfs(struct super_block *, struct statfs *); |
| |
| extern struct address_space_operations hpfs_aops; |