blob: 95d255219b1eb89c68db91d85037a19af20cf1a6 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/fs/hfs/hfs_fs.h
3 *
4 * Copyright (C) 1995-1997 Paul H. Hargrove
5 * (C) 2003 Ardis Technologies <roman@ardistech.com>
6 * This file may be distributed under the terms of the GNU General Public License.
7 */
8
9#ifndef _LINUX_HFS_FS_H
10#define _LINUX_HFS_FS_H
11
Joe Perchesd6142672013-04-30 15:27:55 -070012#ifdef pr_fmt
13#undef pr_fmt
14#endif
15
16#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
17
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <linux/slab.h>
19#include <linux/types.h>
Matthias Kaehlcke3084b722008-07-25 01:46:34 -070020#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <linux/buffer_head.h>
22#include <linux/fs.h>
Artem Bityutskiy5687b572012-07-12 17:28:49 +030023#include <linux/workqueue.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024
25#include <asm/byteorder.h>
26#include <asm/uaccess.h>
27
28#include "hfs.h"
29
30#define DBG_BNODE_REFS 0x00000001
31#define DBG_BNODE_MOD 0x00000002
32#define DBG_CAT_MOD 0x00000004
33#define DBG_INODE 0x00000008
34#define DBG_SUPER 0x00000010
35#define DBG_EXTENT 0x00000020
36#define DBG_BITMAP 0x00000040
37
38//#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD|DBG_CAT_MOD|DBG_BITMAP)
39//#define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE)
40//#define DBG_MASK (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT)
41#define DBG_MASK (0)
42
Joe Perchesd6142672013-04-30 15:27:55 -070043#define hfs_dbg(flg, fmt, ...) \
44do { \
45 if (DBG_##flg & DBG_MASK) \
46 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
Joe Perchesc2b3e1f2013-04-30 15:27:54 -070047} while (0)
48
Joe Perchesd6142672013-04-30 15:27:55 -070049#define hfs_dbg_cont(flg, fmt, ...) \
50do { \
51 if (DBG_##flg & DBG_MASK) \
52 pr_cont(fmt, ##__VA_ARGS__); \
Joe Perchesc2b3e1f2013-04-30 15:27:54 -070053} while (0)
54
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
Linus Torvalds1da177e2005-04-16 15:20:36 -070056/*
57 * struct hfs_inode_info
58 *
59 * The HFS-specific part of a Linux (struct inode)
60 */
61struct hfs_inode_info {
62 atomic_t opencnt;
63
64 unsigned int flags;
65
66 /* to deal with localtime ugliness */
67 int tz_secondswest;
68
69 struct hfs_cat_key cat_key;
70
71 struct list_head open_dir_list;
72 struct inode *rsrc_inode;
73
Matthias Kaehlcke39f8d472008-07-25 01:46:35 -070074 struct mutex extents_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
76 u16 alloc_blocks, clump_blocks;
77 sector_t fs_blocks;
78 /* Allocation extents from catlog record or volume header */
79 hfs_extent_rec first_extents;
80 u16 first_blocks;
81 hfs_extent_rec cached_extents;
82 u16 cached_start, cached_blocks;
83
84 loff_t phys_size;
85 struct inode vfs_inode;
86};
87
88#define HFS_FLG_RSRC 0x0001
89#define HFS_FLG_EXT_DIRTY 0x0002
90#define HFS_FLG_EXT_NEW 0x0004
91
92#define HFS_IS_RSRC(inode) (HFS_I(inode)->flags & HFS_FLG_RSRC)
93
94/*
95 * struct hfs_sb_info
96 *
97 * The HFS-specific part of a Linux (struct super_block)
98 */
99struct hfs_sb_info {
100 struct buffer_head *mdb_bh; /* The hfs_buffer
101 holding the real
102 superblock (aka VIB
103 or MDB) */
104 struct hfs_mdb *mdb;
105 struct buffer_head *alt_mdb_bh; /* The hfs_buffer holding
106 the alternate superblock */
107 struct hfs_mdb *alt_mdb;
108 __be32 *bitmap; /* The page holding the
109 allocation bitmap */
110 struct hfs_btree *ext_tree; /* Information about
111 the extents b-tree */
112 struct hfs_btree *cat_tree; /* Information about
113 the catalog b-tree */
114 u32 file_count; /* The number of
115 regular files in
116 the filesystem */
117 u32 folder_count; /* The number of
118 directories in the
119 filesystem */
120 u32 next_id; /* The next available
121 file id number */
122 u32 clumpablks; /* The number of allocation
123 blocks to try to add when
124 extending a file */
125 u32 fs_start; /* The first 512-byte
126 block represented
127 in the bitmap */
128 u32 part_start;
129 u16 root_files; /* The number of
130 regular
131 (non-directory)
132 files in the root
133 directory */
134 u16 root_dirs; /* The number of
135 directories in the
136 root directory */
137 u16 fs_ablocks; /* The number of
138 allocation blocks
139 in the filesystem */
140 u16 free_ablocks; /* the number of unused
141 allocation blocks
142 in the filesystem */
143 u32 alloc_blksz; /* The size of an
144 "allocation block" */
145 int s_quiet; /* Silent failure when
146 changing owner or mode? */
147 __be32 s_type; /* Type for new files */
148 __be32 s_creator; /* Creator for new files */
149 umode_t s_file_umask; /* The umask applied to the
150 permissions on all files */
151 umode_t s_dir_umask; /* The umask applied to the
152 permissions on all dirs */
Eric W. Biederman43b5e4c2012-02-07 16:26:59 -0800153 kuid_t s_uid; /* The uid of all files */
154 kgid_t s_gid; /* The gid of all files */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
156 int session, part;
Roman Zippel328b9222005-09-06 15:18:49 -0700157 struct nls_table *nls_io, *nls_disk;
Matthias Kaehlcke3084b722008-07-25 01:46:34 -0700158 struct mutex bitmap_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 u16 blockoffset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 int fs_div;
Artem Bityutskiyb16ca622012-07-12 17:28:48 +0300162 struct super_block *sb;
Artem Bityutskiy5687b572012-07-12 17:28:49 +0300163 int work_queued; /* non-zero delayed work is queued */
164 struct delayed_work mdb_work; /* MDB flush delayed work */
165 spinlock_t work_lock; /* protects mdb_work and work_queued */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166};
167
168#define HFS_FLG_BITMAP_DIRTY 0
169#define HFS_FLG_MDB_DIRTY 1
170#define HFS_FLG_ALT_MDB_DIRTY 2
171
172/* bitmap.c */
173extern u32 hfs_vbm_search_free(struct super_block *, u32, u32 *);
174extern int hfs_clear_vbm_bits(struct super_block *, u16, u16);
175
176/* catalog.c */
177extern int hfs_cat_keycmp(const btree_key *, const btree_key *);
178struct hfs_find_data;
179extern int hfs_cat_find_brec(struct super_block *, u32, struct hfs_find_data *);
180extern int hfs_cat_create(u32, struct inode *, struct qstr *, struct inode *);
181extern int hfs_cat_delete(u32, struct inode *, struct qstr *);
182extern int hfs_cat_move(u32, struct inode *, struct qstr *,
183 struct inode *, struct qstr *);
Roman Zippel328b9222005-09-06 15:18:49 -0700184extern void hfs_cat_build_key(struct super_block *, btree_key *, u32, struct qstr *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185
186/* dir.c */
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800187extern const struct file_operations hfs_dir_operations;
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -0800188extern const struct inode_operations hfs_dir_inode_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
190/* extent.c */
191extern int hfs_ext_keycmp(const btree_key *, const btree_key *);
192extern int hfs_free_fork(struct super_block *, struct hfs_cat_file *, int);
Alexey Khoroshilov9509f172013-04-30 15:27:52 -0700193extern int hfs_ext_write_extent(struct inode *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194extern int hfs_extend_file(struct inode *);
195extern void hfs_file_truncate(struct inode *);
196
197extern int hfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
198
199/* inode.c */
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700200extern const struct address_space_operations hfs_aops;
201extern const struct address_space_operations hfs_btree_aops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
Al Viroe021d7b2011-07-26 03:26:05 -0400203extern struct inode *hfs_new_inode(struct inode *, struct qstr *, umode_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204extern void hfs_inode_write_fork(struct inode *, struct hfs_extent *, __be32 *, __be32 *);
Christoph Hellwiga9185b42010-03-05 09:21:37 +0100205extern int hfs_write_inode(struct inode *, struct writeback_control *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206extern int hfs_inode_setattr(struct dentry *, struct iattr *);
207extern void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext,
208 __be32 log_size, __be32 phys_size, u32 clump_size);
209extern struct inode *hfs_iget(struct super_block *, struct hfs_cat_key *, hfs_cat_rec *);
Al Virob57922d2010-06-07 14:34:48 -0400210extern void hfs_evict_inode(struct inode *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211extern void hfs_delete_inode(struct inode *);
212
213/* attr.c */
214extern int hfs_setxattr(struct dentry *dentry, const char *name,
215 const void *value, size_t size, int flags);
216extern ssize_t hfs_getxattr(struct dentry *dentry, const char *name,
217 void *value, size_t size);
218extern ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
219
220/* mdb.c */
221extern int hfs_mdb_get(struct super_block *);
222extern void hfs_mdb_commit(struct super_block *);
223extern void hfs_mdb_close(struct super_block *);
224extern void hfs_mdb_put(struct super_block *);
225
226/* part_tbl.c */
227extern int hfs_part_find(struct super_block *, sector_t *, sector_t *);
228
229/* string.c */
Al Viroe16404e2009-02-20 05:55:13 +0000230extern const struct dentry_operations hfs_dentry_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
Linus Torvaldsda53be12013-05-21 15:22:44 -0700232extern int hfs_hash_dentry(const struct dentry *, struct qstr *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233extern int hfs_strcmp(const unsigned char *, unsigned int,
234 const unsigned char *, unsigned int);
Linus Torvaldsda53be12013-05-21 15:22:44 -0700235extern int hfs_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
Nick Piggin621e1552011-01-07 17:49:27 +1100236 unsigned int len, const char *str, const struct qstr *name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237
238/* trans.c */
Roman Zippel328b9222005-09-06 15:18:49 -0700239extern void hfs_asc2mac(struct super_block *, struct hfs_name *, struct qstr *);
240extern int hfs_mac2asc(struct super_block *, char *, const struct hfs_name *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241
Artem Bityutskiy5687b572012-07-12 17:28:49 +0300242/* super.c */
243extern void hfs_mark_mdb_dirty(struct super_block *sb);
244
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245/*
246 * There are two time systems. Both are based on seconds since
247 * a particular time/date.
248 * Unix: unsigned lil-endian since 00:00 GMT, Jan. 1, 1970
249 * mac: unsigned big-endian since 00:00 GMT, Jan. 1, 1904
250 *
251 */
252#define __hfs_u_to_mtime(sec) cpu_to_be32(sec + 2082844800U - sys_tz.tz_minuteswest * 60)
253#define __hfs_m_to_utime(sec) (be32_to_cpu(sec) - 2082844800U + sys_tz.tz_minuteswest * 60)
254
255#define HFS_I(inode) (list_entry(inode, struct hfs_inode_info, vfs_inode))
256#define HFS_SB(sb) ((struct hfs_sb_info *)(sb)->s_fs_info)
257
258#define hfs_m_to_utime(time) (struct timespec){ .tv_sec = __hfs_m_to_utime(time) }
259#define hfs_u_to_mtime(time) __hfs_u_to_mtime((time).tv_sec)
260#define hfs_mtime() __hfs_u_to_mtime(get_seconds())
261
262static inline const char *hfs_mdb_name(struct super_block *sb)
263{
264 return sb->s_id;
265}
266
267static inline void hfs_bitmap_dirty(struct super_block *sb)
268{
269 set_bit(HFS_FLG_BITMAP_DIRTY, &HFS_SB(sb)->flags);
Artem Bityutskiy5687b572012-07-12 17:28:49 +0300270 hfs_mark_mdb_dirty(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271}
272
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273#define sb_bread512(sb, sec, data) ({ \
274 struct buffer_head *__bh; \
275 sector_t __block; \
276 loff_t __start; \
277 int __offset; \
278 \
279 __start = (loff_t)(sec) << HFS_SECTOR_SIZE_BITS;\
280 __block = __start >> (sb)->s_blocksize_bits; \
281 __offset = __start & ((sb)->s_blocksize - 1); \
282 __bh = sb_bread((sb), __block); \
283 if (likely(__bh != NULL)) \
284 data = (void *)(__bh->b_data + __offset);\
285 else \
286 data = NULL; \
287 __bh; \
288})
289
290#endif