541 lines
16 KiB
C
541 lines
16 KiB
C
/*
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* linux/include/linux/hfsplus_fs.h
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*
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* Copyright (C) 1999
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* Brad Boyer (flar@pants.nu)
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* (C) 2003 Ardis Technologies <roman@ardistech.com>
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*
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*/
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#ifndef _LINUX_HFSPLUS_FS_H
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#define _LINUX_HFSPLUS_FS_H
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#ifdef pr_fmt
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#undef pr_fmt
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#endif
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/fs.h>
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#include <linux/mutex.h>
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#include <linux/buffer_head.h>
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#include <linux/blkdev.h>
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#include "hfsplus_raw.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_ATTR_MOD 0x00000080
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#define DBG_ACL_MOD 0x00000100
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#if 0
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#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD)
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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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#endif
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#define DBG_MASK (0)
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#define hfs_dbg(flg, fmt, ...) \
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do { \
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if (DBG_##flg & DBG_MASK) \
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printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
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} while (0)
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#define hfs_dbg_cont(flg, fmt, ...) \
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do { \
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if (DBG_##flg & DBG_MASK) \
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pr_cont(fmt, ##__VA_ARGS__); \
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} while (0)
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/* Runtime config options */
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#define HFSPLUS_DEF_CR_TYPE 0x3F3F3F3F /* '????' */
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#define HFSPLUS_TYPE_DATA 0x00
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#define HFSPLUS_TYPE_RSRC 0xFF
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typedef int (*btree_keycmp)(const hfsplus_btree_key *,
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const hfsplus_btree_key *);
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#define NODE_HASH_SIZE 256
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/* B-tree mutex nested subclasses */
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enum hfsplus_btree_mutex_classes {
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CATALOG_BTREE_MUTEX,
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EXTENTS_BTREE_MUTEX,
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ATTR_BTREE_MUTEX,
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};
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/* An HFS+ BTree held in memory */
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struct hfs_btree {
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struct super_block *sb;
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struct inode *inode;
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btree_keycmp keycmp;
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u32 cnid;
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u32 root;
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u32 leaf_count;
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u32 leaf_head;
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u32 leaf_tail;
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u32 node_count;
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u32 free_nodes;
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u32 attributes;
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unsigned int node_size;
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unsigned int node_size_shift;
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unsigned int max_key_len;
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unsigned int depth;
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struct mutex tree_lock;
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unsigned int pages_per_bnode;
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spinlock_t hash_lock;
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struct hfs_bnode *node_hash[NODE_HASH_SIZE];
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int node_hash_cnt;
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};
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struct page;
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/* An HFS+ BTree node in memory */
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struct hfs_bnode {
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struct hfs_btree *tree;
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u32 prev;
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u32 this;
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u32 next;
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u32 parent;
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u16 num_recs;
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u8 type;
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u8 height;
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struct hfs_bnode *next_hash;
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unsigned long flags;
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wait_queue_head_t lock_wq;
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atomic_t refcnt;
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unsigned int page_offset;
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struct page *page[0];
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};
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#define HFS_BNODE_LOCK 0
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#define HFS_BNODE_ERROR 1
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#define HFS_BNODE_NEW 2
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#define HFS_BNODE_DIRTY 3
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#define HFS_BNODE_DELETED 4
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/*
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* Attributes file states
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*/
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#define HFSPLUS_EMPTY_ATTR_TREE 0
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#define HFSPLUS_CREATING_ATTR_TREE 1
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#define HFSPLUS_VALID_ATTR_TREE 2
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#define HFSPLUS_FAILED_ATTR_TREE 3
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/*
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* HFS+ superblock info (built from Volume Header on disk)
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*/
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struct hfsplus_vh;
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struct hfs_btree;
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struct hfsplus_sb_info {
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void *s_vhdr_buf;
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struct hfsplus_vh *s_vhdr;
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void *s_backup_vhdr_buf;
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struct hfsplus_vh *s_backup_vhdr;
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struct hfs_btree *ext_tree;
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struct hfs_btree *cat_tree;
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struct hfs_btree *attr_tree;
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atomic_t attr_tree_state;
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struct inode *alloc_file;
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struct inode *hidden_dir;
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struct nls_table *nls;
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/* Runtime variables */
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u32 blockoffset;
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sector_t part_start;
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sector_t sect_count;
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int fs_shift;
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/* immutable data from the volume header */
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u32 alloc_blksz;
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int alloc_blksz_shift;
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u32 total_blocks;
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u32 data_clump_blocks, rsrc_clump_blocks;
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/* mutable data from the volume header, protected by alloc_mutex */
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u32 free_blocks;
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struct mutex alloc_mutex;
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/* mutable data from the volume header, protected by vh_mutex */
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u32 next_cnid;
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u32 file_count;
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u32 folder_count;
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struct mutex vh_mutex;
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/* Config options */
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u32 creator;
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u32 type;
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umode_t umask;
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kuid_t uid;
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kgid_t gid;
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int part, session;
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unsigned long flags;
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int work_queued; /* non-zero delayed work is queued */
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struct delayed_work sync_work; /* FS sync delayed work */
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spinlock_t work_lock; /* protects sync_work and work_queued */
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};
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#define HFSPLUS_SB_WRITEBACKUP 0
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#define HFSPLUS_SB_NODECOMPOSE 1
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#define HFSPLUS_SB_FORCE 2
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#define HFSPLUS_SB_HFSX 3
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#define HFSPLUS_SB_CASEFOLD 4
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#define HFSPLUS_SB_NOBARRIER 5
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static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb)
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{
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return sb->s_fs_info;
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}
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struct hfsplus_inode_info {
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atomic_t opencnt;
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/*
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* Extent allocation information, protected by extents_lock.
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*/
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u32 first_blocks;
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u32 clump_blocks;
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u32 alloc_blocks;
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u32 cached_start;
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u32 cached_blocks;
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hfsplus_extent_rec first_extents;
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hfsplus_extent_rec cached_extents;
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unsigned int extent_state;
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struct mutex extents_lock;
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/*
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* Immutable data.
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*/
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struct inode *rsrc_inode;
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__be32 create_date;
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/*
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* Protected by sbi->vh_mutex.
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*/
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u32 linkid;
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/*
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* Accessed using atomic bitops.
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*/
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unsigned long flags;
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/*
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* Protected by i_mutex.
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*/
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sector_t fs_blocks;
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u8 userflags; /* BSD user file flags */
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u32 subfolders; /* Subfolder count (HFSX only) */
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struct list_head open_dir_list;
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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 HFSPLUS_EXT_DIRTY 0x0001
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#define HFSPLUS_EXT_NEW 0x0002
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#define HFSPLUS_I_RSRC 0 /* represents a resource fork */
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#define HFSPLUS_I_CAT_DIRTY 1 /* has changes in the catalog tree */
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#define HFSPLUS_I_EXT_DIRTY 2 /* has changes in the extent tree */
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#define HFSPLUS_I_ALLOC_DIRTY 3 /* has changes in the allocation file */
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#define HFSPLUS_I_ATTR_DIRTY 4 /* has changes in the attributes tree */
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#define HFSPLUS_IS_RSRC(inode) \
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test_bit(HFSPLUS_I_RSRC, &HFSPLUS_I(inode)->flags)
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static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode)
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{
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return list_entry(inode, struct hfsplus_inode_info, vfs_inode);
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}
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/*
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* Mark an inode dirty, and also mark the btree in which the
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* specific type of metadata is stored.
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* For data or metadata that gets written back by into the catalog btree
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* by hfsplus_write_inode a plain mark_inode_dirty call is enough.
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*/
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static inline void hfsplus_mark_inode_dirty(struct inode *inode,
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unsigned int flag)
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{
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set_bit(flag, &HFSPLUS_I(inode)->flags);
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mark_inode_dirty(inode);
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}
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struct hfs_find_data {
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/* filled by caller */
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hfsplus_btree_key *search_key;
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hfsplus_btree_key *key;
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/* filled by find */
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struct hfs_btree *tree;
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struct hfs_bnode *bnode;
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/* filled by findrec */
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int record;
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int keyoffset, keylength;
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int entryoffset, entrylength;
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};
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struct hfsplus_readdir_data {
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struct list_head list;
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struct file *file;
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struct hfsplus_cat_key key;
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};
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/*
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* Find minimum acceptible I/O size for an hfsplus sb.
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*/
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static inline unsigned short hfsplus_min_io_size(struct super_block *sb)
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{
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return max_t(unsigned short, bdev_logical_block_size(sb->s_bdev),
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HFSPLUS_SECTOR_SIZE);
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}
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#define hfs_btree_open hfsplus_btree_open
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#define hfs_btree_close hfsplus_btree_close
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#define hfs_btree_write hfsplus_btree_write
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#define hfs_bmap_alloc hfsplus_bmap_alloc
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#define hfs_bmap_free hfsplus_bmap_free
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#define hfs_bnode_read hfsplus_bnode_read
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#define hfs_bnode_read_u16 hfsplus_bnode_read_u16
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#define hfs_bnode_read_u8 hfsplus_bnode_read_u8
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#define hfs_bnode_read_key hfsplus_bnode_read_key
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#define hfs_bnode_write hfsplus_bnode_write
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#define hfs_bnode_write_u16 hfsplus_bnode_write_u16
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#define hfs_bnode_clear hfsplus_bnode_clear
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#define hfs_bnode_copy hfsplus_bnode_copy
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#define hfs_bnode_move hfsplus_bnode_move
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#define hfs_bnode_dump hfsplus_bnode_dump
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#define hfs_bnode_unlink hfsplus_bnode_unlink
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#define hfs_bnode_findhash hfsplus_bnode_findhash
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#define hfs_bnode_find hfsplus_bnode_find
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#define hfs_bnode_unhash hfsplus_bnode_unhash
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#define hfs_bnode_free hfsplus_bnode_free
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#define hfs_bnode_create hfsplus_bnode_create
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#define hfs_bnode_get hfsplus_bnode_get
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#define hfs_bnode_put hfsplus_bnode_put
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#define hfs_brec_lenoff hfsplus_brec_lenoff
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#define hfs_brec_keylen hfsplus_brec_keylen
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#define hfs_brec_insert hfsplus_brec_insert
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#define hfs_brec_remove hfsplus_brec_remove
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#define hfs_find_init hfsplus_find_init
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#define hfs_find_exit hfsplus_find_exit
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#define __hfs_brec_find __hfsplus_brec_find
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#define hfs_brec_find hfsplus_brec_find
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#define hfs_brec_read hfsplus_brec_read
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#define hfs_brec_goto hfsplus_brec_goto
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#define hfs_part_find hfsplus_part_find
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/*
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* definitions for ext2 flag ioctls (linux really needs a generic
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* interface for this).
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*/
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/* ext2 ioctls (EXT2_IOC_GETFLAGS and EXT2_IOC_SETFLAGS) to support
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* chattr/lsattr */
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#define HFSPLUS_IOC_EXT2_GETFLAGS FS_IOC_GETFLAGS
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#define HFSPLUS_IOC_EXT2_SETFLAGS FS_IOC_SETFLAGS
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/*
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* hfs+-specific ioctl for making the filesystem bootable
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*/
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#define HFSPLUS_IOC_BLESS _IO('h', 0x80)
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typedef int (*search_strategy_t)(struct hfs_bnode *,
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struct hfs_find_data *,
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int *, int *, int *);
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/*
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* Functions in any *.c used in other files
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*/
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/* attributes.c */
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int __init hfsplus_create_attr_tree_cache(void);
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void hfsplus_destroy_attr_tree_cache(void);
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int hfsplus_attr_bin_cmp_key(const hfsplus_btree_key *k1,
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const hfsplus_btree_key *k2);
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int hfsplus_attr_build_key(struct super_block *sb, hfsplus_btree_key *key,
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u32 cnid, const char *name);
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hfsplus_attr_entry *hfsplus_alloc_attr_entry(void);
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void hfsplus_destroy_attr_entry(hfsplus_attr_entry *entry);
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int hfsplus_find_attr(struct super_block *sb, u32 cnid, const char *name,
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struct hfs_find_data *fd);
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int hfsplus_attr_exists(struct inode *inode, const char *name);
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int hfsplus_create_attr(struct inode *inode, const char *name,
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const void *value, size_t size);
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int hfsplus_delete_attr(struct inode *inode, const char *name);
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int hfsplus_delete_all_attrs(struct inode *dir, u32 cnid);
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/* bitmap.c */
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int hfsplus_block_allocate(struct super_block *sb, u32 size, u32 offset,
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u32 *max);
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int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count);
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/* btree.c */
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u32 hfsplus_calc_btree_clump_size(u32 block_size, u32 node_size, u64 sectors,
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int file_id);
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struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id);
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void hfs_btree_close(struct hfs_btree *tree);
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int hfs_btree_write(struct hfs_btree *tree);
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struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree);
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void hfs_bmap_free(struct hfs_bnode *node);
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/* bnode.c */
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void hfs_bnode_read(struct hfs_bnode *node, void *buf, int off, int len);
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u16 hfs_bnode_read_u16(struct hfs_bnode *node, int off);
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u8 hfs_bnode_read_u8(struct hfs_bnode *node, int off);
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void hfs_bnode_read_key(struct hfs_bnode *node, void *key, int off);
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void hfs_bnode_write(struct hfs_bnode *node, void *buf, int off, int len);
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void hfs_bnode_write_u16(struct hfs_bnode *node, int off, u16 data);
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void hfs_bnode_clear(struct hfs_bnode *node, int off, int len);
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void hfs_bnode_copy(struct hfs_bnode *dst_node, int dst,
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struct hfs_bnode *src_node, int src, int len);
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void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len);
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void hfs_bnode_dump(struct hfs_bnode *node);
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void hfs_bnode_unlink(struct hfs_bnode *node);
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struct hfs_bnode *hfs_bnode_findhash(struct hfs_btree *tree, u32 cnid);
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void hfs_bnode_unhash(struct hfs_bnode *node);
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struct hfs_bnode *hfs_bnode_find(struct hfs_btree *tree, u32 num);
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void hfs_bnode_free(struct hfs_bnode *node);
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struct hfs_bnode *hfs_bnode_create(struct hfs_btree *tree, u32 num);
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void hfs_bnode_get(struct hfs_bnode *node);
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void hfs_bnode_put(struct hfs_bnode *node);
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bool hfs_bnode_need_zeroout(struct hfs_btree *tree);
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/* brec.c */
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u16 hfs_brec_lenoff(struct hfs_bnode *node, u16 rec, u16 *off);
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u16 hfs_brec_keylen(struct hfs_bnode *node, u16 rec);
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int hfs_brec_insert(struct hfs_find_data *fd, void *entry, int entry_len);
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int hfs_brec_remove(struct hfs_find_data *fd);
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/* bfind.c */
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int hfs_find_init(struct hfs_btree *tree, struct hfs_find_data *fd);
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void hfs_find_exit(struct hfs_find_data *fd);
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int hfs_find_1st_rec_by_cnid(struct hfs_bnode *bnode, struct hfs_find_data *fd,
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int *begin, int *end, int *cur_rec);
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int hfs_find_rec_by_key(struct hfs_bnode *bnode, struct hfs_find_data *fd,
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int *begin, int *end, int *cur_rec);
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int __hfs_brec_find(struct hfs_bnode *bnode, struct hfs_find_data *fd,
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search_strategy_t rec_found);
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int hfs_brec_find(struct hfs_find_data *fd, search_strategy_t do_key_compare);
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int hfs_brec_read(struct hfs_find_data *fd, void *rec, int rec_len);
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int hfs_brec_goto(struct hfs_find_data *fd, int cnt);
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/* catalog.c */
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int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *k1,
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const hfsplus_btree_key *k2);
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int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *k1,
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const hfsplus_btree_key *k2);
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int hfsplus_cat_build_key(struct super_block *sb, hfsplus_btree_key *key,
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u32 parent, struct qstr *str);
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void hfsplus_cat_build_key_with_cnid(struct super_block *sb,
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hfsplus_btree_key *key, u32 parent);
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void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms);
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int hfsplus_find_cat(struct super_block *sb, u32 cnid,
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struct hfs_find_data *fd);
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int hfsplus_create_cat(u32 cnid, struct inode *dir, struct qstr *str,
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struct inode *inode);
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int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str);
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int hfsplus_rename_cat(u32 cnid, struct inode *src_dir, struct qstr *src_name,
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struct inode *dst_dir, struct qstr *dst_name);
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/* dir.c */
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extern const struct inode_operations hfsplus_dir_inode_operations;
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extern const struct file_operations hfsplus_dir_operations;
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/* extents.c */
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int hfsplus_ext_cmp_key(const hfsplus_btree_key *k1,
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const hfsplus_btree_key *k2);
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int hfsplus_ext_write_extent(struct inode *inode);
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int hfsplus_get_block(struct inode *inode, sector_t iblock,
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struct buffer_head *bh_result, int create);
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int hfsplus_free_fork(struct super_block *sb, u32 cnid,
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struct hfsplus_fork_raw *fork, int type);
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int hfsplus_file_extend(struct inode *inode, bool zeroout);
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void hfsplus_file_truncate(struct inode *inode);
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/* inode.c */
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extern const struct address_space_operations hfsplus_aops;
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extern const struct address_space_operations hfsplus_btree_aops;
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extern const struct dentry_operations hfsplus_dentry_operations;
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struct inode *hfsplus_new_inode(struct super_block *sb, umode_t mode);
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void hfsplus_delete_inode(struct inode *inode);
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void hfsplus_inode_read_fork(struct inode *inode,
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struct hfsplus_fork_raw *fork);
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void hfsplus_inode_write_fork(struct inode *inode,
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struct hfsplus_fork_raw *fork);
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int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd);
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int hfsplus_cat_write_inode(struct inode *inode);
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int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
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int datasync);
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/* ioctl.c */
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long hfsplus_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
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/* options.c */
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void hfsplus_fill_defaults(struct hfsplus_sb_info *opts);
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int hfsplus_parse_options_remount(char *input, int *force);
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int hfsplus_parse_options(char *input, struct hfsplus_sb_info *sbi);
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int hfsplus_show_options(struct seq_file *seq, struct dentry *root);
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/* part_tbl.c */
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int hfs_part_find(struct super_block *sb, sector_t *part_start,
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sector_t *part_size);
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/* super.c */
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struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino);
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void hfsplus_mark_mdb_dirty(struct super_block *sb);
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/* tables.c */
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extern u16 hfsplus_case_fold_table[];
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extern u16 hfsplus_decompose_table[];
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extern u16 hfsplus_compose_table[];
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/* unicode.c */
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int hfsplus_strcasecmp(const struct hfsplus_unistr *s1,
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const struct hfsplus_unistr *s2);
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int hfsplus_strcmp(const struct hfsplus_unistr *s1,
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const struct hfsplus_unistr *s2);
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int hfsplus_uni2asc(struct super_block *sb, const struct hfsplus_unistr *ustr,
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char *astr, int *len_p);
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int hfsplus_asc2uni(struct super_block *sb, struct hfsplus_unistr *ustr,
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int max_unistr_len, const char *astr, int len);
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int hfsplus_hash_dentry(const struct dentry *dentry, struct qstr *str);
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int hfsplus_compare_dentry(const struct dentry *parent,
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const struct dentry *dentry, unsigned int len,
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const char *str, const struct qstr *name);
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/* wrapper.c */
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int hfsplus_submit_bio(struct super_block *sb, sector_t sector, void *buf,
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void **data, int rw);
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int hfsplus_read_wrapper(struct super_block *sb);
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/* time macros */
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#define __hfsp_mt2ut(t) (be32_to_cpu(t) - 2082844800U)
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#define __hfsp_ut2mt(t) (cpu_to_be32(t + 2082844800U))
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/* compatibility */
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#define hfsp_mt2ut(t) (struct timespec){ .tv_sec = __hfsp_mt2ut(t) }
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#define hfsp_ut2mt(t) __hfsp_ut2mt((t).tv_sec)
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#define hfsp_now2mt() __hfsp_ut2mt(get_seconds())
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#endif
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