diff options
author | Ralf Baechle <ralf@linux-mips.org> | 1999-06-17 14:08:29 +0000 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 1999-06-17 14:08:29 +0000 |
commit | 57d569635c05dc4ea9b9f1f8dcec69b9ddc989b2 (patch) | |
tree | 1f703abf7d95dcd50ee52da3b96eb1b4b2b4ea53 /fs/hpfs/hpfs_fn.h | |
parent | 59223edaa18759982db0a8aced0e77457d10c68e (diff) |
The rest of 2.3.6.
Diffstat (limited to 'fs/hpfs/hpfs_fn.h')
-rw-r--r-- | fs/hpfs/hpfs_fn.h | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/fs/hpfs/hpfs_fn.h b/fs/hpfs/hpfs_fn.h new file mode 100644 index 000000000..cdb2c709e --- /dev/null +++ b/fs/hpfs/hpfs_fn.h @@ -0,0 +1,318 @@ +/* + * 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/malloc.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 <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 - (sys_tz.tz_dsttime ? 3600 : 0) +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 + (sys_tz.tz_dsttime ? 3600 : 0) -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_read(struct file *, char *, size_t, loff_t *); +int hpfs_dir_release(struct inode *, struct file *); +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); +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 *); +secno hpfs_bmap(struct inode *, unsigned); +void hpfs_truncate(struct inode *); +ssize_t hpfs_file_read(struct file *, char *, size_t, loff_t *); +ssize_t hpfs_file_write(struct file *, const char *, size_t, loff_t *); + +/* 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); + +/* mmap.c */ + +int hpfs_mmap(struct file *, struct vm_area_struct *); + +/* 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_readlink(struct dentry *, char *, int); +struct dentry *hpfs_follow_link(struct dentry *, struct dentry *, unsigned int); +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 *, int); +struct super_block *hpfs_read_super(struct super_block *, void *, int); 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