/* * linux/fs/hfs/hfs_fs.h * * Copyright (C) 1995-1997 Paul H. Hargrove * (C) 2003 Ardis Technologies <roman@ardistech.com> * This file may be distributed under the terms of the GNU General Public License. */ #ifndef _LINUX_HFS_FS_H #define _LINUX_HFS_FS_H #ifdef pr_fmt #undef pr_fmt #endif #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/slab.h> #include <linux/types.h> #include <linux/mutex.h> #include <linux/buffer_head.h> #include <linux/fs.h> #include <linux/workqueue.h> #include <asm/byteorder.h> #include <linux/uaccess.h> #include "hfs.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_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD|DBG_CAT_MOD|DBG_BITMAP) //#define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE) //#define DBG_MASK (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT) #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) /* * struct hfs_inode_info * * The HFS-specific part of a Linux (struct inode) */ struct hfs_inode_info { atomic_t opencnt; unsigned int flags; /* to deal with localtime ugliness */ int tz_secondswest; struct hfs_cat_key cat_key; struct list_head open_dir_list; spinlock_t open_dir_lock; struct inode *rsrc_inode; struct mutex extents_lock; u16 alloc_blocks, clump_blocks; sector_t fs_blocks; /* Allocation extents from catlog record or volume header */ hfs_extent_rec first_extents; u16 first_blocks; hfs_extent_rec cached_extents; u16 cached_start, cached_blocks; loff_t phys_size; struct inode vfs_inode; }; #define HFS_FLG_RSRC 0x0001 #define HFS_FLG_EXT_DIRTY 0x0002 #define HFS_FLG_EXT_NEW 0x0004 #define HFS_IS_RSRC(inode) (HFS_I(inode)->flags & HFS_FLG_RSRC) /* * struct hfs_sb_info * * The HFS-specific part of a Linux (struct super_block) */ struct hfs_sb_info { struct buffer_head *mdb_bh; /* The hfs_buffer holding the real superblock (aka VIB or MDB) */ struct hfs_mdb *mdb; struct buffer_head *alt_mdb_bh; /* The hfs_buffer holding the alternate superblock */ struct hfs_mdb *alt_mdb; __be32 *bitmap; /* The page holding the allocation bitmap */ struct hfs_btree *ext_tree; /* Information about the extents b-tree */ struct hfs_btree *cat_tree; /* Information about the catalog b-tree */ u32 file_count; /* The number of regular files in the filesystem */ u32 folder_count; /* The number of directories in the filesystem */ u32 next_id; /* The next available file id number */ u32 clumpablks; /* The number of allocation blocks to try to add when extending a file */ u32 fs_start; /* The first 512-byte block represented in the bitmap */ u32 part_start; u16 root_files; /* The number of regular (non-directory) files in the root directory */ u16 root_dirs; /* The number of directories in the root directory */ u16 fs_ablocks; /* The number of allocation blocks in the filesystem */ u16 free_ablocks; /* the number of unused allocation blocks in the filesystem */ u32 alloc_blksz; /* The size of an "allocation block" */ int s_quiet; /* Silent failure when changing owner or mode? */ __be32 s_type; /* Type for new files */ __be32 s_creator; /* Creator for new files */ umode_t s_file_umask; /* The umask applied to the permissions on all files */ umode_t s_dir_umask; /* The umask applied to the permissions on all dirs */ kuid_t s_uid; /* The uid of all files */ kgid_t s_gid; /* The gid of all files */ int session, part; struct nls_table *nls_io, *nls_disk; struct mutex bitmap_lock; unsigned long flags; u16 blockoffset; int fs_div; struct super_block *sb; int work_queued; /* non-zero delayed work is queued */ struct delayed_work mdb_work; /* MDB flush delayed work */ spinlock_t work_lock; /* protects mdb_work and work_queued */ }; #define HFS_FLG_BITMAP_DIRTY 0 #define HFS_FLG_MDB_DIRTY 1 #define HFS_FLG_ALT_MDB_DIRTY 2 /* bitmap.c */ extern u32 hfs_vbm_search_free(struct super_block *, u32, u32 *); extern int hfs_clear_vbm_bits(struct super_block *, u16, u16); /* catalog.c */ extern int hfs_cat_keycmp(const btree_key *, const btree_key *); struct hfs_find_data; extern int hfs_cat_find_brec(struct super_block *, u32, struct hfs_find_data *); extern int hfs_cat_create(u32, struct inode *, const struct qstr *, struct inode *); extern int hfs_cat_delete(u32, struct inode *, const struct qstr *); extern int hfs_cat_move(u32, struct inode *, const struct qstr *, struct inode *, const struct qstr *); extern void hfs_cat_build_key(struct super_block *, btree_key *, u32, const struct qstr *); /* dir.c */ extern const struct file_operations hfs_dir_operations; extern const struct inode_operations hfs_dir_inode_operations; /* extent.c */ extern int hfs_ext_keycmp(const btree_key *, const btree_key *); extern int hfs_free_fork(struct super_block *, struct hfs_cat_file *, int); extern int hfs_ext_write_extent(struct inode *); extern int hfs_extend_file(struct inode *); extern void hfs_file_truncate(struct inode *); extern int hfs_get_block(struct inode *, sector_t, struct buffer_head *, int); /* inode.c */ extern const struct address_space_operations hfs_aops; extern const struct address_space_operations hfs_btree_aops; int hfs_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, struct page **pagep, void **fsdata); extern struct inode *hfs_new_inode(struct inode *, const struct qstr *, umode_t); extern void hfs_inode_write_fork(struct inode *, struct hfs_extent *, __be32 *, __be32 *); extern int hfs_write_inode(struct inode *, struct writeback_control *); extern int hfs_inode_setattr(struct mnt_idmap *, struct dentry *, struct iattr *); extern void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext, __be32 log_size, __be32 phys_size, u32 clump_size); extern struct inode *hfs_iget(struct super_block *, struct hfs_cat_key *, hfs_cat_rec *); extern void hfs_evict_inode(struct inode *); extern void hfs_delete_inode(struct inode *); /* attr.c */ extern const struct xattr_handler * const hfs_xattr_handlers[]; /* mdb.c */ extern int hfs_mdb_get(struct super_block *); extern void hfs_mdb_commit(struct super_block *); extern void hfs_mdb_close(struct super_block *); extern void hfs_mdb_put(struct super_block *); /* part_tbl.c */ extern int hfs_part_find(struct super_block *, sector_t *, sector_t *); /* string.c */ extern const struct dentry_operations hfs_dentry_operations; extern int hfs_hash_dentry(const struct dentry *, struct qstr *); extern int hfs_strcmp(const unsigned char *, unsigned int, const unsigned char *, unsigned int); extern int hfs_compare_dentry(const struct dentry *dentry, unsigned int len, const char *str, const struct qstr *name); /* trans.c */ extern void hfs_asc2mac(struct super_block *, struct hfs_name *, const struct qstr *); extern int hfs_mac2asc(struct super_block *, char *, const struct hfs_name *); /* super.c */ extern void hfs_mark_mdb_dirty(struct super_block *sb); /* * There are two time systems. Both are based on seconds since * a particular time/date. * Unix: signed little-endian since 00:00 GMT, Jan. 1, 1970 * mac: unsigned big-endian since 00:00 GMT, Jan. 1, 1904 * * HFS implementations are highly inconsistent, this one matches the * traditional behavior of 64-bit Linux, giving the most useful * time range between 1970 and 2106, by treating any on-disk timestamp * under HFS_UTC_OFFSET (Jan 1 1970) as a time between 2040 and 2106. */ #define HFS_UTC_OFFSET 2082844800U static inline time64_t __hfs_m_to_utime(__be32 mt) { time64_t ut = (u32)(be32_to_cpu(mt) - HFS_UTC_OFFSET); return ut + sys_tz.tz_minuteswest * 60; } static inline __be32 __hfs_u_to_mtime(time64_t ut) { ut -= sys_tz.tz_minuteswest * 60; return cpu_to_be32(lower_32_bits(ut) + HFS_UTC_OFFSET); } #define HFS_I(inode) (container_of(inode, struct hfs_inode_info, vfs_inode)) #define HFS_SB(sb) ((struct hfs_sb_info *)(sb)->s_fs_info) #define hfs_m_to_utime(time) (struct timespec64){ .tv_sec = __hfs_m_to_utime(time) } #define hfs_u_to_mtime(time) __hfs_u_to_mtime((time).tv_sec) #define hfs_mtime() __hfs_u_to_mtime(ktime_get_real_seconds()) static inline const char *hfs_mdb_name(struct super_block *sb) { return sb->s_id; } static inline void hfs_bitmap_dirty(struct super_block *sb) { set_bit(HFS_FLG_BITMAP_DIRTY, &HFS_SB(sb)->flags); hfs_mark_mdb_dirty(sb); } #define sb_bread512(sb, sec, data) ({ \ struct buffer_head *__bh; \ sector_t __block; \ loff_t __start; \ int __offset; \ \ __start = (loff_t)(sec) << HFS_SECTOR_SIZE_BITS;\ __block = __start >> (sb)->s_blocksize_bits; \ __offset = __start & ((sb)->s_blocksize - 1); \ __bh = sb_bread((sb), __block); \ if (likely(__bh != NULL)) \ data = (void *)(__bh->b_data + __offset);\ else \ data = NULL; \ __bh; \ }) #endif