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/* SPDX-License-Identifier: GPL-2.0 */
/*
* linux/include/linux/hfsplus_fs.h
*
* Copyright (C) 1999
* Brad Boyer (flar@pants.nu)
* (C) 2003 Ardis Technologies <roman@ardistech.com>
*
*/
#ifndef _LINUX_HFSPLUS_FS_H
#define _LINUX_HFSPLUS_FS_H
#ifdef pr_fmt
#undef pr_fmt
#endif
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/fs.h>
#include <linux/mutex.h>
#include <linux/buffer_head.h>
#include <linux/blkdev.h>
#include "hfsplus_raw.h"
#define DBG_BNODE_REFS 0x00000001
#define DBG_BNODE_MOD 0x00000002
#define DBG_CAT_MOD 0x00000004
#define DBG_INODE 0x00000008
#define DBG_SUPER 0x00000010
#define DBG_EXTENT 0x00000020
#define DBG_BITMAP 0x00000040
#define DBG_ATTR_MOD 0x00000080
#if 0
#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD)
#define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE)
#define DBG_MASK (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT)
#endif
#define DBG_MASK (0)
#define hfs_dbg(flg, fmt, ...) \
do { \
if (DBG_##flg & DBG_MASK) \
printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
} while (0)
#define hfs_dbg_cont(flg, fmt, ...) \
do { \
if (DBG_##flg & DBG_MASK) \
pr_cont(fmt, ##__VA_ARGS__); \
} while (0)
/* Runtime config options */
#define HFSPLUS_DEF_CR_TYPE 0x3F3F3F3F /* '????' */
#define HFSPLUS_TYPE_DATA 0x00
#define HFSPLUS_TYPE_RSRC 0xFF
typedef int (*btree_keycmp)(const hfsplus_btree_key *,
const hfsplus_btree_key *);
#define NODE_HASH_SIZE 256
/* B-tree mutex nested subclasses */
enum hfsplus_btree_mutex_classes {
CATALOG_BTREE_MUTEX,
EXTENTS_BTREE_MUTEX,
ATTR_BTREE_MUTEX,
};
/* An HFS+ BTree held in memory */
struct hfs_btree {
struct super_block *sb;
struct inode *inode;
btree_keycmp keycmp;
u32 cnid;
u32 root;
u32 leaf_count;
u32 leaf_head;
u32 leaf_tail;
u32 node_count;
u32 free_nodes;
u32 attributes;
unsigned int node_size;
unsigned int node_size_shift;
unsigned int max_key_len;
unsigned int depth;
struct mutex tree_lock;
unsigned int pages_per_bnode;
spinlock_t hash_lock;
struct hfs_bnode *node_hash[NODE_HASH_SIZE];
int node_hash_cnt;
};
struct page;
/* An HFS+ BTree node in memory */
struct hfs_bnode {
struct hfs_btree *tree;
u32 prev;
u32 this;
u32 next;
u32 parent;
u16 num_recs;
u8 type;
u8 height;
struct hfs_bnode *next_hash;
unsigned long flags;
wait_queue_head_t lock_wq;
atomic_t refcnt;
unsigned int page_offset;
struct page *page[0];
};
#define HFS_BNODE_LOCK 0
#define HFS_BNODE_ERROR 1
#define HFS_BNODE_NEW 2
#define HFS_BNODE_DIRTY 3
#define HFS_BNODE_DELETED 4
/*
* Attributes file states
*/
#define HFSPLUS_EMPTY_ATTR_TREE 0
#define HFSPLUS_CREATING_ATTR_TREE 1
#define HFSPLUS_VALID_ATTR_TREE 2
#define HFSPLUS_FAILED_ATTR_TREE 3
/*
* HFS+ superblock info (built from Volume Header on disk)
*/
struct hfsplus_vh;
struct hfs_btree;
struct hfsplus_sb_info {
void *s_vhdr_buf;
struct hfsplus_vh *s_vhdr;
void *s_backup_vhdr_buf;
struct hfsplus_vh *s_backup_vhdr;
struct hfs_btree *ext_tree;
struct hfs_btree *cat_tree;
struct hfs_btree *attr_tree;
atomic_t attr_tree_state;
struct inode *alloc_file;
struct inode *hidden_dir;
struct nls_table *nls;
/* Runtime variables */
u32 blockoffset;
sector_t part_start;
sector_t sect_count;
int fs_shift;
/* immutable data from the volume header */
u32 alloc_blksz;
int alloc_blksz_shift;
u32 total_blocks;
u32 data_clump_blocks, rsrc_clump_blocks;
/* mutable data from the volume header, protected by alloc_mutex */
u32 free_blocks;
struct mutex alloc_mutex;
/* mutable data from the volume header, protected by vh_mutex */
u32 next_cnid;
u32 file_count;
u32 folder_count;
struct mutex vh_mutex;
/* Config options */
u32 creator;
u32 type;
umode_t umask;
kuid_t uid;
kgid_t gid;
int part, session;
unsigned long flags;
int work_queued; /* non-zero delayed work is queued */
struct delayed_work sync_work; /* FS sync delayed work */
spinlock_t work_lock; /* protects sync_work and work_queued */
};
#define HFSPLUS_SB_WRITEBACKUP 0
#define HFSPLUS_SB_NODECOMPOSE 1
#define HFSPLUS_SB_FORCE 2
#define HFSPLUS_SB_HFSX 3
#define HFSPLUS_SB_CASEFOLD 4
#define HFSPLUS_SB_NOBARRIER 5
static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb)
{
return sb->s_fs_info;
}
struct hfsplus_inode_info {
atomic_t opencnt;
/*
* Extent allocation information, protected by extents_lock.
*/
u32 first_blocks;
u32 clump_blocks;
u32 alloc_blocks;
u32 cached_start;
u32 cached_blocks;
hfsplus_extent_rec first_extents;
hfsplus_extent_rec cached_extents;
unsigned int extent_state;
struct mutex extents_lock;
/*
* Immutable data.
*/
struct inode *rsrc_inode;
__be32 create_date;
/*
* Protected by sbi->vh_mutex.
*/
u32 linkid;
/*
* Accessed using atomic bitops.
*/
unsigned long flags;
/*
* Protected by i_mutex.
*/
sector_t fs_blocks;
u8 userflags; /* BSD user file flags */
u32 subfolders; /* Subfolder count (HFSX only) */
struct list_head open_dir_list;
spinlock_t open_dir_lock;
loff_t phys_size;
struct inode vfs_inode;
};
#define HFSPLUS_EXT_DIRTY 0x0001
#define HFSPLUS_EXT_NEW 0x0002
#define HFSPLUS_I_RSRC 0 /* represents a resource fork */
#define HFSPLUS_I_CAT_DIRTY 1 /* has changes in the catalog tree */
#define HFSPLUS_I_EXT_DIRTY 2 /* has changes in the extent tree */
#define HFSPLUS_I_ALLOC_DIRTY 3 /* has changes in the allocation file */
#define HFSPLUS_I_ATTR_DIRTY 4 /* has changes in the attributes tree */
#define HFSPLUS_IS_RSRC(inode) \
test_bit(HFSPLUS_I_RSRC, &HFSPLUS_I(inode)->flags)
static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode)
{
return container_of(inode, struct hfsplus_inode_info, vfs_inode);
}
/*
* Mark an inode dirty, and also mark the btree in which the
* specific type of metadata is stored.
* For data or metadata that gets written back by into the catalog btree
* by hfsplus_write_inode a plain mark_inode_dirty call is enough.
*/
static inline void hfsplus_mark_inode_dirty(struct inode *inode,
unsigned int flag)
{
set_bit(flag, &HFSPLUS_I(inode)->flags);
mark_inode_dirty(inode);
}
struct hfs_find_data {
/* filled by caller */
hfsplus_btree_key *search_key;
hfsplus_btree_key *key;
/* filled by find */
struct hfs_btree *tree;
struct hfs_bnode *bnode;
/* filled by findrec */
int record;
int keyoffset, keylength;
int entryoffset, entrylength;
};
struct hfsplus_readdir_data {
struct list_head list;
struct file *file;
struct hfsplus_cat_key key;
};
/*
* Find minimum acceptible I/O size for an hfsplus sb.
*/
static inline unsigned short hfsplus_min_io_size(struct super_block *sb)
{
return max_t(unsigned short, bdev_logical_block_size(sb->s_bdev),
HFSPLUS_SECTOR_SIZE);
}
#define hfs_btree_open hfsplus_btree_open
#define hfs_btree_close hfsplus_btree_close
#define hfs_btree_write hfsplus_btree_write
#define hfs_bmap_reserve hfsplus_bmap_reserve
#define hfs_bmap_alloc hfsplus_bmap_alloc
#define hfs_bmap_free hfsplus_bmap_free
#define hfs_bnode_read hfsplus_bnode_read
#define hfs_bnode_read_u16 hfsplus_bnode_read_u16
#define hfs_bnode_read_u8 hfsplus_bnode_read_u8
#define hfs_bnode_read_key hfsplus_bnode_read_key
#define hfs_bnode_write hfsplus_bnode_write
#define hfs_bnode_write_u16 hfsplus_bnode_write_u16
#define hfs_bnode_clear hfsplus_bnode_clear
#define hfs_bnode_copy hfsplus_bnode_copy
#define hfs_bnode_move hfsplus_bnode_move
#define hfs_bnode_dump hfsplus_bnode_dump
#define hfs_bnode_unlink hfsplus_bnode_unlink
#define hfs_bnode_findhash hfsplus_bnode_findhash
#define hfs_bnode_find hfsplus_bnode_find
#define hfs_bnode_unhash hfsplus_bnode_unhash
#define hfs_bnode_free hfsplus_bnode_free
#define hfs_bnode_create hfsplus_bnode_create
#define hfs_bnode_get hfsplus_bnode_get
#define hfs_bnode_put hfsplus_bnode_put
#define hfs_brec_lenoff hfsplus_brec_lenoff
#define hfs_brec_keylen hfsplus_brec_keylen
#define hfs_brec_insert hfsplus_brec_insert
#define hfs_brec_remove hfsplus_brec_remove
#define hfs_find_init hfsplus_find_init
#define hfs_find_exit hfsplus_find_exit
#define __hfs_brec_find __hfsplus_brec_find
#define hfs_brec_find hfsplus_brec_find
#define hfs_brec_read hfsplus_brec_read
#define hfs_brec_goto hfsplus_brec_goto
#define hfs_part_find hfsplus_part_find
/*
* definitions for ext2 flag ioctls (linux really needs a generic
* interface for this).
*/
/* ext2 ioctls (EXT2_IOC_GETFLAGS and EXT2_IOC_SETFLAGS) to support
* chattr/lsattr */
#define HFSPLUS_IOC_EXT2_GETFLAGS FS_IOC_GETFLAGS
#define HFSPLUS_IOC_EXT2_SETFLAGS FS_IOC_SETFLAGS
/*
* hfs+-specific ioctl for making the filesystem bootable
*/
#define HFSPLUS_IOC_BLESS _IO('h', 0x80)
typedef int (*search_strategy_t)(struct hfs_bnode *,
struct hfs_find_data *,
int *, int *, int *);
/*
* Functions in any *.c used in other files
*/
/* attributes.c */
int __init hfsplus_create_attr_tree_cache(void);
void hfsplus_destroy_attr_tree_cache(void);
int hfsplus_attr_bin_cmp_key(const hfsplus_btree_key *k1,
const hfsplus_btree_key *k2);
int hfsplus_attr_build_key(struct super_block *sb, hfsplus_btree_key *key,
u32 cnid, const char *name);
hfsplus_attr_entry *hfsplus_alloc_attr_entry(void);
void hfsplus_destroy_attr_entry(hfsplus_attr_entry *entry);
int hfsplus_find_attr(struct super_block *sb, u32 cnid, const char *name,
struct hfs_find_data *fd);
int hfsplus_attr_exists(struct inode *inode, const char *<
|