285 lines
8.4 KiB
C
285 lines
8.4 KiB
C
/*
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* linux/fs/hfs/hfs_fs.h
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*
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* Copyright (C) 1995-1997 Paul H. Hargrove
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* (C) 2003 Ardis Technologies <roman@ardistech.com>
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* This file may be distributed under the terms of the GNU General Public License.
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*/
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#ifndef _LINUX_HFS_FS_H
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#define _LINUX_HFS_FS_H
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <linux/buffer_head.h>
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#include <linux/fs.h>
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#include <asm/byteorder.h>
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#include <asm/uaccess.h>
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#include "hfs.h"
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#define DBG_BNODE_REFS 0x00000001
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#define DBG_BNODE_MOD 0x00000002
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#define DBG_CAT_MOD 0x00000004
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#define DBG_INODE 0x00000008
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#define DBG_SUPER 0x00000010
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#define DBG_EXTENT 0x00000020
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#define DBG_BITMAP 0x00000040
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//#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD|DBG_CAT_MOD|DBG_BITMAP)
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//#define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE)
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//#define DBG_MASK (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT)
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#define DBG_MASK (0)
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#define dprint(flg, fmt, args...) \
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if (flg & DBG_MASK) printk(fmt , ## args)
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/*
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* struct hfs_inode_info
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*
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* The HFS-specific part of a Linux (struct inode)
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*/
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struct hfs_inode_info {
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atomic_t opencnt;
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unsigned int flags;
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/* to deal with localtime ugliness */
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int tz_secondswest;
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struct hfs_cat_key cat_key;
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struct list_head open_dir_list;
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struct inode *rsrc_inode;
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struct semaphore extents_lock;
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u16 alloc_blocks, clump_blocks;
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sector_t fs_blocks;
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/* Allocation extents from catlog record or volume header */
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hfs_extent_rec first_extents;
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u16 first_blocks;
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hfs_extent_rec cached_extents;
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u16 cached_start, cached_blocks;
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loff_t phys_size;
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struct inode vfs_inode;
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};
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#define HFS_FLG_RSRC 0x0001
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#define HFS_FLG_EXT_DIRTY 0x0002
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#define HFS_FLG_EXT_NEW 0x0004
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#define HFS_IS_RSRC(inode) (HFS_I(inode)->flags & HFS_FLG_RSRC)
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/*
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* struct hfs_sb_info
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*
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* The HFS-specific part of a Linux (struct super_block)
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*/
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struct hfs_sb_info {
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struct buffer_head *mdb_bh; /* The hfs_buffer
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holding the real
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superblock (aka VIB
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or MDB) */
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struct hfs_mdb *mdb;
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struct buffer_head *alt_mdb_bh; /* The hfs_buffer holding
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the alternate superblock */
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struct hfs_mdb *alt_mdb;
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__be32 *bitmap; /* The page holding the
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allocation bitmap */
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struct hfs_btree *ext_tree; /* Information about
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the extents b-tree */
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struct hfs_btree *cat_tree; /* Information about
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the catalog b-tree */
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u32 file_count; /* The number of
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regular files in
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the filesystem */
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u32 folder_count; /* The number of
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directories in the
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filesystem */
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u32 next_id; /* The next available
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file id number */
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u32 clumpablks; /* The number of allocation
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blocks to try to add when
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extending a file */
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u32 fs_start; /* The first 512-byte
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block represented
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in the bitmap */
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u32 part_start;
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u16 root_files; /* The number of
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regular
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(non-directory)
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files in the root
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directory */
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u16 root_dirs; /* The number of
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directories in the
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root directory */
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u16 fs_ablocks; /* The number of
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allocation blocks
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in the filesystem */
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u16 free_ablocks; /* the number of unused
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allocation blocks
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in the filesystem */
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u32 alloc_blksz; /* The size of an
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"allocation block" */
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int s_quiet; /* Silent failure when
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changing owner or mode? */
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__be32 s_type; /* Type for new files */
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__be32 s_creator; /* Creator for new files */
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umode_t s_file_umask; /* The umask applied to the
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permissions on all files */
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umode_t s_dir_umask; /* The umask applied to the
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permissions on all dirs */
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uid_t s_uid; /* The uid of all files */
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gid_t s_gid; /* The gid of all files */
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int session, part;
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struct nls_table *nls_io, *nls_disk;
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struct semaphore bitmap_lock;
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unsigned long flags;
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u16 blockoffset;
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int fs_div;
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struct hlist_head rsrc_inodes;
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};
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#define HFS_FLG_BITMAP_DIRTY 0
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#define HFS_FLG_MDB_DIRTY 1
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#define HFS_FLG_ALT_MDB_DIRTY 2
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/* bitmap.c */
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extern u32 hfs_vbm_search_free(struct super_block *, u32, u32 *);
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extern int hfs_clear_vbm_bits(struct super_block *, u16, u16);
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/* catalog.c */
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extern int hfs_cat_keycmp(const btree_key *, const btree_key *);
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struct hfs_find_data;
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extern int hfs_cat_find_brec(struct super_block *, u32, struct hfs_find_data *);
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extern int hfs_cat_create(u32, struct inode *, struct qstr *, struct inode *);
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extern int hfs_cat_delete(u32, struct inode *, struct qstr *);
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extern int hfs_cat_move(u32, struct inode *, struct qstr *,
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struct inode *, struct qstr *);
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extern void hfs_cat_build_key(struct super_block *, btree_key *, u32, struct qstr *);
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/* dir.c */
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extern struct file_operations hfs_dir_operations;
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extern struct inode_operations hfs_dir_inode_operations;
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/* extent.c */
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extern int hfs_ext_keycmp(const btree_key *, const btree_key *);
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extern int hfs_free_fork(struct super_block *, struct hfs_cat_file *, int);
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extern void hfs_ext_write_extent(struct inode *);
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extern int hfs_extend_file(struct inode *);
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extern void hfs_file_truncate(struct inode *);
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extern int hfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
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/* inode.c */
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extern struct address_space_operations hfs_aops;
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extern struct address_space_operations hfs_btree_aops;
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extern struct inode *hfs_new_inode(struct inode *, struct qstr *, int);
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extern void hfs_inode_write_fork(struct inode *, struct hfs_extent *, __be32 *, __be32 *);
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extern int hfs_write_inode(struct inode *, int);
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extern int hfs_inode_setattr(struct dentry *, struct iattr *);
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extern void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext,
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__be32 log_size, __be32 phys_size, u32 clump_size);
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extern struct inode *hfs_iget(struct super_block *, struct hfs_cat_key *, hfs_cat_rec *);
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extern void hfs_clear_inode(struct inode *);
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extern void hfs_delete_inode(struct inode *);
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/* attr.c */
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extern int hfs_setxattr(struct dentry *dentry, const char *name,
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const void *value, size_t size, int flags);
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extern ssize_t hfs_getxattr(struct dentry *dentry, const char *name,
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void *value, size_t size);
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extern ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
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/* mdb.c */
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extern int hfs_mdb_get(struct super_block *);
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extern void hfs_mdb_commit(struct super_block *);
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extern void hfs_mdb_close(struct super_block *);
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extern void hfs_mdb_put(struct super_block *);
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/* part_tbl.c */
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extern int hfs_part_find(struct super_block *, sector_t *, sector_t *);
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/* string.c */
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extern struct dentry_operations hfs_dentry_operations;
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extern int hfs_hash_dentry(struct dentry *, struct qstr *);
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extern int hfs_strcmp(const unsigned char *, unsigned int,
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const unsigned char *, unsigned int);
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extern int hfs_compare_dentry(struct dentry *, struct qstr *, struct qstr *);
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/* trans.c */
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extern void hfs_asc2mac(struct super_block *, struct hfs_name *, struct qstr *);
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extern int hfs_mac2asc(struct super_block *, char *, const struct hfs_name *);
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extern struct timezone sys_tz;
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/*
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* There are two time systems. Both are based on seconds since
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* a particular time/date.
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* Unix: unsigned lil-endian since 00:00 GMT, Jan. 1, 1970
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* mac: unsigned big-endian since 00:00 GMT, Jan. 1, 1904
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*
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*/
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#define __hfs_u_to_mtime(sec) cpu_to_be32(sec + 2082844800U - sys_tz.tz_minuteswest * 60)
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#define __hfs_m_to_utime(sec) (be32_to_cpu(sec) - 2082844800U + sys_tz.tz_minuteswest * 60)
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#define HFS_I(inode) (list_entry(inode, struct hfs_inode_info, vfs_inode))
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#define HFS_SB(sb) ((struct hfs_sb_info *)(sb)->s_fs_info)
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#define hfs_m_to_utime(time) (struct timespec){ .tv_sec = __hfs_m_to_utime(time) }
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#define hfs_u_to_mtime(time) __hfs_u_to_mtime((time).tv_sec)
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#define hfs_mtime() __hfs_u_to_mtime(get_seconds())
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static inline const char *hfs_mdb_name(struct super_block *sb)
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{
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return sb->s_id;
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}
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static inline void hfs_bitmap_dirty(struct super_block *sb)
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{
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set_bit(HFS_FLG_BITMAP_DIRTY, &HFS_SB(sb)->flags);
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sb->s_dirt = 1;
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}
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static inline void hfs_buffer_sync(struct buffer_head *bh)
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{
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while (buffer_locked(bh)) {
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wait_on_buffer(bh);
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}
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if (buffer_dirty(bh)) {
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ll_rw_block(WRITE, 1, &bh);
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wait_on_buffer(bh);
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}
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}
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#define sb_bread512(sb, sec, data) ({ \
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struct buffer_head *__bh; \
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sector_t __block; \
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loff_t __start; \
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int __offset; \
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\
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__start = (loff_t)(sec) << HFS_SECTOR_SIZE_BITS;\
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__block = __start >> (sb)->s_blocksize_bits; \
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__offset = __start & ((sb)->s_blocksize - 1); \
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__bh = sb_bread((sb), __block); \
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if (likely(__bh != NULL)) \
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data = (void *)(__bh->b_data + __offset);\
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else \
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data = NULL; \
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__bh; \
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})
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#endif
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