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1#include <linux/types.h>
2#include <linux/fs.h>
3#include <linux/buffer_head.h>
4#include <linux/amigaffs.h>
5#include <linux/mutex.h>
6#include <linux/workqueue.h>
7
8/* Ugly macros make the code more pretty. */
9
10#define GET_END_PTR(st,p,sz) ((st *)((char *)(p)+((sz)-sizeof(st))))
11#define AFFS_GET_HASHENTRY(data,hashkey) be32_to_cpu(((struct dir_front *)data)->hashtable[hashkey])
12#define AFFS_BLOCK(sb, bh, blk) (AFFS_HEAD(bh)->table[AFFS_SB(sb)->s_hashsize-1-(blk)])
13
14#define AFFS_HEAD(bh) ((struct affs_head *)(bh)->b_data)
15#define AFFS_TAIL(sb, bh) ((struct affs_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_tail)))
16#define AFFS_ROOT_HEAD(bh) ((struct affs_root_head *)(bh)->b_data)
17#define AFFS_ROOT_TAIL(sb, bh) ((struct affs_root_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_root_tail)))
18#define AFFS_DATA_HEAD(bh) ((struct affs_data_head *)(bh)->b_data)
19#define AFFS_DATA(bh) (((struct affs_data_head *)(bh)->b_data)->data)
20
21#define AFFS_CACHE_SIZE PAGE_SIZE
22
23#define AFFS_LC_SIZE (AFFS_CACHE_SIZE/sizeof(u32)/2)
24#define AFFS_AC_SIZE (AFFS_CACHE_SIZE/sizeof(struct affs_ext_key)/2)
25#define AFFS_AC_MASK (AFFS_AC_SIZE-1)
26
27struct affs_ext_key {
28 u32 ext; /* idx of the extended block */
29 u32 key; /* block number */
30};
31
32/*
33 * affs fs inode data in memory
34 */
35struct affs_inode_info {
36 atomic_t i_opencnt;
37 struct semaphore i_link_lock; /* Protects internal inode access. */
38 struct semaphore i_ext_lock; /* Protects internal inode access. */
39#define i_hash_lock i_ext_lock
40 u32 i_blkcnt; /* block count */
41 u32 i_extcnt; /* extended block count */
42 u32 *i_lc; /* linear cache of extended blocks */
43 u32 i_lc_size;
44 u32 i_lc_shift;
45 u32 i_lc_mask;
46 struct affs_ext_key *i_ac; /* associative cache of extended blocks */
47 u32 i_ext_last; /* last accessed extended block */
48 struct buffer_head *i_ext_bh; /* bh of last extended block */
49 loff_t mmu_private;
50 u32 i_protect; /* unused attribute bits */
51 u32 i_lastalloc; /* last allocated block */
52 int i_pa_cnt; /* number of preallocated blocks */
53 struct inode vfs_inode;
54};
55
56/* short cut to get to the affs specific inode data */
57static inline struct affs_inode_info *AFFS_I(struct inode *inode)
58{
59 return list_entry(inode, struct affs_inode_info, vfs_inode);
60}
61
62/*
63 * super-block data in memory
64 *
65 * Block numbers are adjusted for their actual size
66 *
67 */
68
69struct affs_bm_info {
70 u32 bm_key; /* Disk block number */
71 u32 bm_free; /* Free blocks in here */
72};
73
74struct affs_sb_info {
75 int s_partition_size; /* Partition size in blocks. */
76 int s_reserved; /* Number of reserved blocks. */
77 //u32 s_blksize; /* Initial device blksize */
78 u32 s_data_blksize; /* size of the data block w/o header */
79 u32 s_root_block; /* FFS root block number. */
80 int s_hashsize; /* Size of hash table. */
81 unsigned long s_flags; /* See below. */
82 kuid_t s_uid; /* uid to override */
83 kgid_t s_gid; /* gid to override */
84 umode_t s_mode; /* mode to override */
85 struct buffer_head *s_root_bh; /* Cached root block. */
86 struct mutex s_bmlock; /* Protects bitmap access. */
87 struct affs_bm_info *s_bitmap; /* Bitmap infos. */
88 u32 s_bmap_count; /* # of bitmap blocks. */
89 u32 s_bmap_bits; /* # of bits in one bitmap blocks */
90 u32 s_last_bmap;
91 struct buffer_head *s_bmap_bh;
92 char *s_prefix; /* Prefix for volumes and assigns. */
93 char s_volume[32]; /* Volume prefix for absolute symlinks. */
94 spinlock_t symlink_lock; /* protects the previous two */
95 struct super_block *sb; /* the VFS superblock object */
96 int work_queued; /* non-zero delayed work is queued */
97 struct delayed_work sb_work; /* superblock flush delayed work */
98 spinlock_t work_lock; /* protects sb_work and work_queued */
99};
100
101#define SF_INTL 0x0001 /* International filesystem. */
102#define SF_BM_VALID 0x0002 /* Bitmap is valid. */
103#define SF_IMMUTABLE 0x0004 /* Protection bits cannot be changed */
104#define SF_QUIET 0x0008 /* chmod errors will be not reported */
105#define SF_SETUID 0x0010 /* Ignore Amiga uid */
106#define SF_SETGID 0x0020 /* Ignore Amiga gid */
107#define SF_SETMODE 0x0040 /* Ignore Amiga protection bits */
108#define SF_MUFS 0x0100 /* Use MUFS uid/gid mapping */
109#define SF_OFS 0x0200 /* Old filesystem */
110#define SF_PREFIX 0x0400 /* Buffer for prefix is allocated */
111#define SF_VERBOSE 0x0800 /* Talk about fs when mounting */
112#define SF_NO_TRUNCATE 0x1000 /* Don't truncate filenames */
113
114/* short cut to get to the affs specific sb data */
115static inline struct affs_sb_info *AFFS_SB(struct super_block *sb)
116{
117 return sb->s_fs_info;
118}
119
120void affs_mark_sb_dirty(struct super_block *sb);
121
122/* amigaffs.c */
123
124extern int affs_insert_hash(struct inode *inode, struct buffer_head *bh);
125extern int affs_remove_hash(struct inode *dir, struct buffer_head *rem_bh);
126extern int affs_remove_header(struct dentry *dentry);
127extern u32 affs_checksum_block(struct super_block *sb, struct buffer_head *bh);
128extern void affs_fix_checksum(struct super_block *sb, struct buffer_head *bh);
129extern void secs_to_datestamp(time_t secs, struct affs_date *ds);
130extern umode_t prot_to_mode(u32 prot);
131extern void mode_to_prot(struct inode *inode);
132extern void affs_error(struct super_block *sb, const char *function,
133 const char *fmt, ...);
134extern void affs_warning(struct super_block *sb, const char *function,
135 const char *fmt, ...);
136extern bool affs_nofilenametruncate(const struct dentry *dentry);
137extern int affs_check_name(const unsigned char *name, int len,
138 bool notruncate);
139extern int affs_copy_name(unsigned char *bstr, struct dentry *dentry);
140
141/* bitmap. c */
142
143extern u32 affs_count_free_blocks(struct super_block *s);
144extern void affs_free_block(struct super_block *sb, u32 block);
145extern u32 affs_alloc_block(struct inode *inode, u32 goal);
146extern int affs_init_bitmap(struct super_block *sb, int *flags);
147extern void affs_free_bitmap(struct super_block *sb);
148
149/* namei.c */
150
151extern int affs_hash_name(struct super_block *sb, const u8 *name, unsigned int len);
152extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int);
153extern int affs_unlink(struct inode *dir, struct dentry *dentry);
154extern int affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool);
155extern int affs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
156extern int affs_rmdir(struct inode *dir, struct dentry *dentry);
157extern int affs_link(struct dentry *olddentry, struct inode *dir,
158 struct dentry *dentry);
159extern int affs_symlink(struct inode *dir, struct dentry *dentry,
160 const char *symname);
161extern int affs_rename(struct inode *old_dir, struct dentry *old_dentry,
162 struct inode *new_dir, struct dentry *new_dentry);
163
164/* inode.c */
165
166extern unsigned long affs_parent_ino(struct inode *dir);
167extern struct inode *affs_new_inode(struct inode *dir);
168extern int affs_notify_change(struct dentry *dentry, struct iattr *attr);
169extern void affs_evict_inode(struct inode *inode);
170extern struct inode *affs_iget(struct super_block *sb,
171 unsigned long ino);
172extern int affs_write_inode(struct inode *inode,
173 struct writeback_control *wbc);
174extern int affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type);
175
176/* file.c */
177
178void affs_free_prealloc(struct inode *inode);
179extern void affs_truncate(struct inode *);
180int affs_file_fsync(struct file *, loff_t, loff_t, int);
181
182/* dir.c */
183
184extern void affs_dir_truncate(struct inode *);
185
186/* jump tables */
187
188extern const struct inode_operations affs_file_inode_operations;
189extern const struct inode_operations affs_dir_inode_operations;
190extern const struct inode_operations affs_symlink_inode_operations;
191extern const struct file_operations affs_file_operations;
192extern const struct file_operations affs_file_operations_ofs;
193extern const struct file_operations affs_dir_operations;
194extern const struct address_space_operations affs_symlink_aops;
195extern const struct address_space_operations affs_aops;
196extern const struct address_space_operations affs_aops_ofs;
197
198extern const struct dentry_operations affs_dentry_operations;
199extern const struct dentry_operations affs_intl_dentry_operations;
200
201static inline void
202affs_set_blocksize(struct super_block *sb, int size)
203{
204 sb_set_blocksize(sb, size);
205}
206static inline struct buffer_head *
207affs_bread(struct super_block *sb, int block)
208{
209 pr_debug("affs_bread: %d\n", block);
210 if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size)
211 return sb_bread(sb, block);
212 return NULL;
213}
214static inline struct buffer_head *
215affs_getblk(struct super_block *sb, int block)
216{
217 pr_debug("affs_getblk: %d\n", block);
218 if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size)
219 return sb_getblk(sb, block);
220 return NULL;
221}
222static inline struct buffer_head *
223affs_getzeroblk(struct super_block *sb, int block)
224{
225 struct buffer_head *bh;
226 pr_debug("affs_getzeroblk: %d\n", block);
227 if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) {
228 bh = sb_getblk(sb, block);
229 lock_buffer(bh);
230 memset(bh->b_data, 0 , sb->s_blocksize);
231 set_buffer_uptodate(bh);
232 unlock_buffer(bh);
233 return bh;
234 }
235 return NULL;
236}
237static inline struct buffer_head *
238affs_getemptyblk(struct super_block *sb, int block)
239{
240 struct buffer_head *bh;
241 pr_debug("affs_getemptyblk: %d\n", block);
242 if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) {
243 bh = sb_getblk(sb, block);
244 wait_on_buffer(bh);
245 set_buffer_uptodate(bh);
246 return bh;
247 }
248 return NULL;
249}
250static inline void
251affs_brelse(struct buffer_head *bh)
252{
253 if (bh)
254 pr_debug("affs_brelse: %lld\n", (long long) bh->b_blocknr);
255 brelse(bh);
256}
257
258static inline void
259affs_adjust_checksum(struct buffer_head *bh, u32 val)
260{
261 u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[5]);
262 ((__be32 *)bh->b_data)[5] = cpu_to_be32(tmp - val);
263}
264static inline void
265affs_adjust_bitmapchecksum(struct buffer_head *bh, u32 val)
266{
267 u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[0]);
268 ((__be32 *)bh->b_data)[0] = cpu_to_be32(tmp - val);
269}
270
271static inline void
272affs_lock_link(struct inode *inode)
273{
274 down(&AFFS_I(inode)->i_link_lock);
275}
276static inline void
277affs_unlock_link(struct inode *inode)
278{
279 up(&AFFS_I(inode)->i_link_lock);
280}
281static inline void
282affs_lock_dir(struct inode *inode)
283{
284 down(&AFFS_I(inode)->i_hash_lock);
285}
286static inline void
287affs_unlock_dir(struct inode *inode)
288{
289 up(&AFFS_I(inode)->i_hash_lock);
290}
291static inline void
292affs_lock_ext(struct inode *inode)
293{
294 down(&AFFS_I(inode)->i_ext_lock);
295}
296static inline void
297affs_unlock_ext(struct inode *inode)
298{
299 up(&AFFS_I(inode)->i_ext_lock);
300}
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifdef pr_fmt
3#undef pr_fmt
4#endif
5
6#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7
8#include <linux/types.h>
9#include <linux/fs.h>
10#include <linux/buffer_head.h>
11#include "amigaffs.h"
12#include <linux/mutex.h>
13#include <linux/workqueue.h>
14
15/* Ugly macros make the code more pretty. */
16
17#define GET_END_PTR(st,p,sz) ((st *)((char *)(p)+((sz)-sizeof(st))))
18#define AFFS_GET_HASHENTRY(data,hashkey) be32_to_cpu(((struct dir_front *)data)->hashtable[hashkey])
19#define AFFS_BLOCK(sb, bh, blk) (AFFS_HEAD(bh)->table[AFFS_SB(sb)->s_hashsize-1-(blk)])
20
21#define AFFS_HEAD(bh) ((struct affs_head *)(bh)->b_data)
22#define AFFS_TAIL(sb, bh) ((struct affs_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_tail)))
23#define AFFS_ROOT_HEAD(bh) ((struct affs_root_head *)(bh)->b_data)
24#define AFFS_ROOT_TAIL(sb, bh) ((struct affs_root_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_root_tail)))
25#define AFFS_DATA_HEAD(bh) ((struct affs_data_head *)(bh)->b_data)
26#define AFFS_DATA(bh) (((struct affs_data_head *)(bh)->b_data)->data)
27
28#define AFFS_CACHE_SIZE PAGE_SIZE
29
30#define AFFS_LC_SIZE (AFFS_CACHE_SIZE/sizeof(u32)/2)
31#define AFFS_AC_SIZE (AFFS_CACHE_SIZE/sizeof(struct affs_ext_key)/2)
32#define AFFS_AC_MASK (AFFS_AC_SIZE-1)
33
34#define AFFSNAMEMAX 30U
35
36struct affs_ext_key {
37 u32 ext; /* idx of the extended block */
38 u32 key; /* block number */
39};
40
41/*
42 * affs fs inode data in memory
43 */
44struct affs_inode_info {
45 atomic_t i_opencnt;
46 struct semaphore i_link_lock; /* Protects internal inode access. */
47 struct semaphore i_ext_lock; /* Protects internal inode access. */
48#define i_hash_lock i_ext_lock
49 u32 i_blkcnt; /* block count */
50 u32 i_extcnt; /* extended block count */
51 u32 *i_lc; /* linear cache of extended blocks */
52 u32 i_lc_size;
53 u32 i_lc_shift;
54 u32 i_lc_mask;
55 struct affs_ext_key *i_ac; /* associative cache of extended blocks */
56 u32 i_ext_last; /* last accessed extended block */
57 struct buffer_head *i_ext_bh; /* bh of last extended block */
58 loff_t mmu_private;
59 u32 i_protect; /* unused attribute bits */
60 u32 i_lastalloc; /* last allocated block */
61 int i_pa_cnt; /* number of preallocated blocks */
62 struct inode vfs_inode;
63};
64
65/* short cut to get to the affs specific inode data */
66static inline struct affs_inode_info *AFFS_I(struct inode *inode)
67{
68 return container_of(inode, struct affs_inode_info, vfs_inode);
69}
70
71/*
72 * super-block data in memory
73 *
74 * Block numbers are adjusted for their actual size
75 *
76 */
77
78struct affs_bm_info {
79 u32 bm_key; /* Disk block number */
80 u32 bm_free; /* Free blocks in here */
81};
82
83struct affs_sb_info {
84 int s_partition_size; /* Partition size in blocks. */
85 int s_reserved; /* Number of reserved blocks. */
86 //u32 s_blksize; /* Initial device blksize */
87 u32 s_data_blksize; /* size of the data block w/o header */
88 u32 s_root_block; /* FFS root block number. */
89 int s_hashsize; /* Size of hash table. */
90 unsigned long s_flags; /* See below. */
91 kuid_t s_uid; /* uid to override */
92 kgid_t s_gid; /* gid to override */
93 umode_t s_mode; /* mode to override */
94 struct buffer_head *s_root_bh; /* Cached root block. */
95 struct mutex s_bmlock; /* Protects bitmap access. */
96 struct affs_bm_info *s_bitmap; /* Bitmap infos. */
97 u32 s_bmap_count; /* # of bitmap blocks. */
98 u32 s_bmap_bits; /* # of bits in one bitmap blocks */
99 u32 s_last_bmap;
100 struct buffer_head *s_bmap_bh;
101 char *s_prefix; /* Prefix for volumes and assigns. */
102 char s_volume[32]; /* Volume prefix for absolute symlinks. */
103 spinlock_t symlink_lock; /* protects the previous two */
104 struct super_block *sb; /* the VFS superblock object */
105 int work_queued; /* non-zero delayed work is queued */
106 struct delayed_work sb_work; /* superblock flush delayed work */
107 spinlock_t work_lock; /* protects sb_work and work_queued */
108};
109
110#define AFFS_MOUNT_SF_INTL 0x0001 /* International filesystem. */
111#define AFFS_MOUNT_SF_BM_VALID 0x0002 /* Bitmap is valid. */
112#define AFFS_MOUNT_SF_IMMUTABLE 0x0004 /* Protection bits cannot be changed */
113#define AFFS_MOUNT_SF_QUIET 0x0008 /* chmod errors will be not reported */
114#define AFFS_MOUNT_SF_SETUID 0x0010 /* Ignore Amiga uid */
115#define AFFS_MOUNT_SF_SETGID 0x0020 /* Ignore Amiga gid */
116#define AFFS_MOUNT_SF_SETMODE 0x0040 /* Ignore Amiga protection bits */
117#define AFFS_MOUNT_SF_MUFS 0x0100 /* Use MUFS uid/gid mapping */
118#define AFFS_MOUNT_SF_OFS 0x0200 /* Old filesystem */
119#define AFFS_MOUNT_SF_PREFIX 0x0400 /* Buffer for prefix is allocated */
120#define AFFS_MOUNT_SF_VERBOSE 0x0800 /* Talk about fs when mounting */
121#define AFFS_MOUNT_SF_NO_TRUNCATE 0x1000 /* Don't truncate filenames */
122
123#define affs_clear_opt(o, opt) (o &= ~AFFS_MOUNT_##opt)
124#define affs_set_opt(o, opt) (o |= AFFS_MOUNT_##opt)
125#define affs_test_opt(o, opt) ((o) & AFFS_MOUNT_##opt)
126
127/* short cut to get to the affs specific sb data */
128static inline struct affs_sb_info *AFFS_SB(struct super_block *sb)
129{
130 return sb->s_fs_info;
131}
132
133void affs_mark_sb_dirty(struct super_block *sb);
134
135/* amigaffs.c */
136
137extern int affs_insert_hash(struct inode *inode, struct buffer_head *bh);
138extern int affs_remove_hash(struct inode *dir, struct buffer_head *rem_bh);
139extern int affs_remove_header(struct dentry *dentry);
140extern u32 affs_checksum_block(struct super_block *sb, struct buffer_head *bh);
141extern void affs_fix_checksum(struct super_block *sb, struct buffer_head *bh);
142extern void affs_secs_to_datestamp(time64_t secs, struct affs_date *ds);
143extern umode_t affs_prot_to_mode(u32 prot);
144extern void affs_mode_to_prot(struct inode *inode);
145__printf(3, 4)
146extern void affs_error(struct super_block *sb, const char *function,
147 const char *fmt, ...);
148__printf(3, 4)
149extern void affs_warning(struct super_block *sb, const char *function,
150 const char *fmt, ...);
151extern bool affs_nofilenametruncate(const struct dentry *dentry);
152extern int affs_check_name(const unsigned char *name, int len,
153 bool notruncate);
154extern int affs_copy_name(unsigned char *bstr, struct dentry *dentry);
155
156/* bitmap. c */
157
158extern u32 affs_count_free_blocks(struct super_block *s);
159extern void affs_free_block(struct super_block *sb, u32 block);
160extern u32 affs_alloc_block(struct inode *inode, u32 goal);
161extern int affs_init_bitmap(struct super_block *sb, int *flags);
162extern void affs_free_bitmap(struct super_block *sb);
163
164/* namei.c */
165
166extern const struct export_operations affs_export_ops;
167extern int affs_hash_name(struct super_block *sb, const u8 *name, unsigned int len);
168extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int);
169extern int affs_unlink(struct inode *dir, struct dentry *dentry);
170extern int affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool);
171extern int affs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
172extern int affs_rmdir(struct inode *dir, struct dentry *dentry);
173extern int affs_link(struct dentry *olddentry, struct inode *dir,
174 struct dentry *dentry);
175extern int affs_symlink(struct inode *dir, struct dentry *dentry,
176 const char *symname);
177extern int affs_rename2(struct inode *old_dir, struct dentry *old_dentry,
178 struct inode *new_dir, struct dentry *new_dentry,
179 unsigned int flags);
180
181/* inode.c */
182
183extern struct inode *affs_new_inode(struct inode *dir);
184extern int affs_notify_change(struct dentry *dentry, struct iattr *attr);
185extern void affs_evict_inode(struct inode *inode);
186extern struct inode *affs_iget(struct super_block *sb,
187 unsigned long ino);
188extern int affs_write_inode(struct inode *inode,
189 struct writeback_control *wbc);
190extern int affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type);
191
192/* file.c */
193
194void affs_free_prealloc(struct inode *inode);
195extern void affs_truncate(struct inode *);
196int affs_file_fsync(struct file *, loff_t, loff_t, int);
197
198/* dir.c */
199
200extern void affs_dir_truncate(struct inode *);
201
202/* jump tables */
203
204extern const struct inode_operations affs_file_inode_operations;
205extern const struct inode_operations affs_dir_inode_operations;
206extern const struct inode_operations affs_symlink_inode_operations;
207extern const struct file_operations affs_file_operations;
208extern const struct file_operations affs_file_operations_ofs;
209extern const struct file_operations affs_dir_operations;
210extern const struct address_space_operations affs_symlink_aops;
211extern const struct address_space_operations affs_aops;
212extern const struct address_space_operations affs_aops_ofs;
213
214extern const struct dentry_operations affs_dentry_operations;
215extern const struct dentry_operations affs_intl_dentry_operations;
216
217static inline bool affs_validblock(struct super_block *sb, int block)
218{
219 return(block >= AFFS_SB(sb)->s_reserved &&
220 block < AFFS_SB(sb)->s_partition_size);
221}
222
223static inline void
224affs_set_blocksize(struct super_block *sb, int size)
225{
226 sb_set_blocksize(sb, size);
227}
228static inline struct buffer_head *
229affs_bread(struct super_block *sb, int block)
230{
231 pr_debug("%s: %d\n", __func__, block);
232 if (affs_validblock(sb, block))
233 return sb_bread(sb, block);
234 return NULL;
235}
236static inline struct buffer_head *
237affs_getblk(struct super_block *sb, int block)
238{
239 pr_debug("%s: %d\n", __func__, block);
240 if (affs_validblock(sb, block))
241 return sb_getblk(sb, block);
242 return NULL;
243}
244static inline struct buffer_head *
245affs_getzeroblk(struct super_block *sb, int block)
246{
247 struct buffer_head *bh;
248 pr_debug("%s: %d\n", __func__, block);
249 if (affs_validblock(sb, block)) {
250 bh = sb_getblk(sb, block);
251 lock_buffer(bh);
252 memset(bh->b_data, 0 , sb->s_blocksize);
253 set_buffer_uptodate(bh);
254 unlock_buffer(bh);
255 return bh;
256 }
257 return NULL;
258}
259static inline struct buffer_head *
260affs_getemptyblk(struct super_block *sb, int block)
261{
262 struct buffer_head *bh;
263 pr_debug("%s: %d\n", __func__, block);
264 if (affs_validblock(sb, block)) {
265 bh = sb_getblk(sb, block);
266 wait_on_buffer(bh);
267 set_buffer_uptodate(bh);
268 return bh;
269 }
270 return NULL;
271}
272static inline void
273affs_brelse(struct buffer_head *bh)
274{
275 if (bh)
276 pr_debug("%s: %lld\n", __func__, (long long) bh->b_blocknr);
277 brelse(bh);
278}
279
280static inline void
281affs_adjust_checksum(struct buffer_head *bh, u32 val)
282{
283 u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[5]);
284 ((__be32 *)bh->b_data)[5] = cpu_to_be32(tmp - val);
285}
286static inline void
287affs_adjust_bitmapchecksum(struct buffer_head *bh, u32 val)
288{
289 u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[0]);
290 ((__be32 *)bh->b_data)[0] = cpu_to_be32(tmp - val);
291}
292
293static inline void
294affs_lock_link(struct inode *inode)
295{
296 down(&AFFS_I(inode)->i_link_lock);
297}
298static inline void
299affs_unlock_link(struct inode *inode)
300{
301 up(&AFFS_I(inode)->i_link_lock);
302}
303static inline void
304affs_lock_dir(struct inode *inode)
305{
306 down(&AFFS_I(inode)->i_hash_lock);
307}
308static inline void
309affs_unlock_dir(struct inode *inode)
310{
311 up(&AFFS_I(inode)->i_hash_lock);
312}
313static inline void
314affs_lock_ext(struct inode *inode)
315{
316 down(&AFFS_I(inode)->i_ext_lock);
317}
318static inline void
319affs_unlock_ext(struct inode *inode)
320{
321 up(&AFFS_I(inode)->i_ext_lock);
322}