Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  *  linux/fs/hfs/hfs_fs.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright (C) 1995-1997  Paul H. Hargrove
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * (C) 2003 Ardis Technologies <roman@ardistech.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * This file may be distributed under the terms of the GNU General Public License.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #ifndef _LINUX_HFS_FS_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #define _LINUX_HFS_FS_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #ifdef pr_fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #undef pr_fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <asm/byteorder.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include "hfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define DBG_BNODE_REFS	0x00000001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define DBG_BNODE_MOD	0x00000002
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define DBG_CAT_MOD	0x00000004
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #define DBG_INODE	0x00000008
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #define DBG_SUPER	0x00000010
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define DBG_EXTENT	0x00000020
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #define DBG_BITMAP	0x00000040
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) //#define DBG_MASK	(DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD|DBG_CAT_MOD|DBG_BITMAP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) //#define DBG_MASK	(DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) //#define DBG_MASK	(DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #define DBG_MASK	(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) #define hfs_dbg(flg, fmt, ...)					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) do {								\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	if (DBG_##flg & DBG_MASK)				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__);	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) #define hfs_dbg_cont(flg, fmt, ...)				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) do {								\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	if (DBG_##flg & DBG_MASK)				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		pr_cont(fmt, ##__VA_ARGS__);			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57)  * struct hfs_inode_info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59)  * The HFS-specific part of a Linux (struct inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) struct hfs_inode_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	atomic_t opencnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	unsigned int flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	/* to deal with localtime ugliness */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	int tz_secondswest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	struct hfs_cat_key cat_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	struct list_head open_dir_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	spinlock_t open_dir_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	struct inode *rsrc_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	struct mutex extents_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	u16 alloc_blocks, clump_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	sector_t fs_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	/* Allocation extents from catlog record or volume header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	hfs_extent_rec first_extents;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	u16 first_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	hfs_extent_rec cached_extents;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	u16 cached_start, cached_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	loff_t phys_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	struct inode vfs_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) #define HFS_FLG_RSRC		0x0001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) #define HFS_FLG_EXT_DIRTY	0x0002
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) #define HFS_FLG_EXT_NEW		0x0004
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) #define HFS_IS_RSRC(inode)	(HFS_I(inode)->flags & HFS_FLG_RSRC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96)  * struct hfs_sb_info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98)  * The HFS-specific part of a Linux (struct super_block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) struct hfs_sb_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	struct buffer_head *mdb_bh;		/* The hfs_buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 						   holding the real
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 						   superblock (aka VIB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 						   or MDB) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	struct hfs_mdb *mdb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	struct buffer_head *alt_mdb_bh;		/* The hfs_buffer holding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 						   the alternate superblock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	struct hfs_mdb *alt_mdb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	__be32 *bitmap;				/* The page holding the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 						   allocation bitmap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	struct hfs_btree *ext_tree;			/* Information about
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 						   the extents b-tree */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	struct hfs_btree *cat_tree;			/* Information about
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 						   the catalog b-tree */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	u32 file_count;				/* The number of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 						   regular files in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 						   the filesystem */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	u32 folder_count;			/* The number of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 						   directories in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 						   filesystem */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	u32 next_id;				/* The next available
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 						   file id number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	u32 clumpablks;				/* The number of allocation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 						   blocks to try to add when
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 						   extending a file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	u32 fs_start;				/* The first 512-byte
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 						   block represented
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 						   in the bitmap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	u32 part_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	u16 root_files;				/* The number of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 						   regular
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 						   (non-directory)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 						   files in the root
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 						   directory */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	u16 root_dirs;				/* The number of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 						   directories in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 						   root directory */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	u16 fs_ablocks;				/* The number of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 						   allocation blocks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 						   in the filesystem */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	u16 free_ablocks;			/* the number of unused
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 						   allocation blocks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 						   in the filesystem */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	u32 alloc_blksz;			/* The size of an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 						   "allocation block" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	int s_quiet;				/* Silent failure when
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 						   changing owner or mode? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	__be32 s_type;				/* Type for new files */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	__be32 s_creator;			/* Creator for new files */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	umode_t s_file_umask;			/* The umask applied to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 						   permissions on all files */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	umode_t s_dir_umask;			/* The umask applied to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 						   permissions on all dirs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	kuid_t s_uid;				/* The uid of all files */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	kgid_t s_gid;				/* The gid of all files */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	int session, part;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	struct nls_table *nls_io, *nls_disk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	struct mutex bitmap_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	u16 blockoffset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	int fs_div;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	struct super_block *sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	int work_queued;		/* non-zero delayed work is queued */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	struct delayed_work mdb_work;	/* MDB flush delayed work */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	spinlock_t work_lock;		/* protects mdb_work and work_queued */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) #define HFS_FLG_BITMAP_DIRTY	0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) #define HFS_FLG_MDB_DIRTY	1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) #define HFS_FLG_ALT_MDB_DIRTY	2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) /* bitmap.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) extern u32 hfs_vbm_search_free(struct super_block *, u32, u32 *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) extern int hfs_clear_vbm_bits(struct super_block *, u16, u16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) /* catalog.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) extern int hfs_cat_keycmp(const btree_key *, const btree_key *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) struct hfs_find_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) extern int hfs_cat_find_brec(struct super_block *, u32, struct hfs_find_data *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) extern int hfs_cat_create(u32, struct inode *, const struct qstr *, struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) extern int hfs_cat_delete(u32, struct inode *, const struct qstr *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) extern int hfs_cat_move(u32, struct inode *, const struct qstr *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 			struct inode *, const struct qstr *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) extern void hfs_cat_build_key(struct super_block *, btree_key *, u32, const struct qstr *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) /* dir.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) extern const struct file_operations hfs_dir_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) extern const struct inode_operations hfs_dir_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) /* extent.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) extern int hfs_ext_keycmp(const btree_key *, const btree_key *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) extern int hfs_free_fork(struct super_block *, struct hfs_cat_file *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) extern int hfs_ext_write_extent(struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) extern int hfs_extend_file(struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) extern void hfs_file_truncate(struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) extern int hfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) /* inode.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) extern const struct address_space_operations hfs_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) extern const struct address_space_operations hfs_btree_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) extern struct inode *hfs_new_inode(struct inode *, const struct qstr *, umode_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) extern void hfs_inode_write_fork(struct inode *, struct hfs_extent *, __be32 *, __be32 *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) extern int hfs_write_inode(struct inode *, struct writeback_control *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) extern int hfs_inode_setattr(struct dentry *, struct iattr *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) extern void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 			__be32 log_size, __be32 phys_size, u32 clump_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) extern struct inode *hfs_iget(struct super_block *, struct hfs_cat_key *, hfs_cat_rec *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) extern void hfs_evict_inode(struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) extern void hfs_delete_inode(struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) /* attr.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) extern const struct xattr_handler *hfs_xattr_handlers[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) /* mdb.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) extern int hfs_mdb_get(struct super_block *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) extern void hfs_mdb_commit(struct super_block *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) extern void hfs_mdb_close(struct super_block *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) extern void hfs_mdb_put(struct super_block *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) /* part_tbl.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) extern int hfs_part_find(struct super_block *, sector_t *, sector_t *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) /* string.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) extern const struct dentry_operations hfs_dentry_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) extern int hfs_hash_dentry(const struct dentry *, struct qstr *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) extern int hfs_strcmp(const unsigned char *, unsigned int,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		      const unsigned char *, unsigned int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) extern int hfs_compare_dentry(const struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		unsigned int len, const char *str, const struct qstr *name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) /* trans.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) extern void hfs_asc2mac(struct super_block *, struct hfs_name *, const struct qstr *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) extern int hfs_mac2asc(struct super_block *, char *, const struct hfs_name *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) /* super.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) extern void hfs_mark_mdb_dirty(struct super_block *sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)  * There are two time systems.  Both are based on seconds since
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)  * a particular time/date.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)  *	Unix:	signed little-endian since 00:00 GMT, Jan. 1, 1970
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)  *	mac:	unsigned big-endian since 00:00 GMT, Jan. 1, 1904
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)  * HFS implementations are highly inconsistent, this one matches the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)  * traditional behavior of 64-bit Linux, giving the most useful
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)  * time range between 1970 and 2106, by treating any on-disk timestamp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)  * under HFS_UTC_OFFSET (Jan 1 1970) as a time between 2040 and 2106.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) #define HFS_UTC_OFFSET 2082844800U
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) static inline time64_t __hfs_m_to_utime(__be32 mt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	time64_t ut = (u32)(be32_to_cpu(mt) - HFS_UTC_OFFSET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	return ut + sys_tz.tz_minuteswest * 60;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) static inline __be32 __hfs_u_to_mtime(time64_t ut)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	ut -= sys_tz.tz_minuteswest * 60;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	return cpu_to_be32(lower_32_bits(ut) + HFS_UTC_OFFSET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) #define HFS_I(inode)	(container_of(inode, struct hfs_inode_info, vfs_inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) #define HFS_SB(sb)	((struct hfs_sb_info *)(sb)->s_fs_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) #define hfs_m_to_utime(time)   (struct timespec64){ .tv_sec = __hfs_m_to_utime(time) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) #define hfs_u_to_mtime(time)   __hfs_u_to_mtime((time).tv_sec)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) #define hfs_mtime()		__hfs_u_to_mtime(ktime_get_real_seconds())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) static inline const char *hfs_mdb_name(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	return sb->s_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) static inline void hfs_bitmap_dirty(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	set_bit(HFS_FLG_BITMAP_DIRTY, &HFS_SB(sb)->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	hfs_mark_mdb_dirty(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) #define sb_bread512(sb, sec, data) ({			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	struct buffer_head *__bh;			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	sector_t __block;				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	loff_t __start;					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	int __offset;					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 							\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	__start = (loff_t)(sec) << HFS_SECTOR_SIZE_BITS;\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	__block = __start >> (sb)->s_blocksize_bits;	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	__offset = __start & ((sb)->s_blocksize - 1);	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	__bh = sb_bread((sb), __block);			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	if (likely(__bh != NULL))			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 		data = (void *)(__bh->b_data + __offset);\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	else						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 		data = NULL;				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	__bh;						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) #endif