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-rw-r--r--fs/hfs/hfs_fs.h306
1 files changed, 306 insertions, 0 deletions
diff --git a/fs/hfs/hfs_fs.h b/fs/hfs/hfs_fs.h
new file mode 100644
index 0000000000..49d02524e6
--- /dev/null
+++ b/fs/hfs/hfs_fs.h
@@ -0,0 +1,306 @@
+/*
+ * 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 *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