5 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7 #include <linux/types.h>
9 #include <linux/buffer_head.h>
10 #include <linux/amigaffs.h>
11 #include <linux/mutex.h>
12 #include <linux/workqueue.h>
14 /* Ugly macros make the code more pretty. */
16 #define GET_END_PTR(st,p,sz) ((st *)((char *)(p)+((sz)-sizeof(st))))
17 #define AFFS_GET_HASHENTRY(data,hashkey) be32_to_cpu(((struct dir_front *)data)->hashtable[hashkey])
18 #define AFFS_BLOCK(sb, bh, blk) (AFFS_HEAD(bh)->table[AFFS_SB(sb)->s_hashsize-1-(blk)])
20 #define AFFS_HEAD(bh) ((struct affs_head *)(bh)->b_data)
21 #define AFFS_TAIL(sb, bh) ((struct affs_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_tail)))
22 #define AFFS_ROOT_HEAD(bh) ((struct affs_root_head *)(bh)->b_data)
23 #define AFFS_ROOT_TAIL(sb, bh) ((struct affs_root_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_root_tail)))
24 #define AFFS_DATA_HEAD(bh) ((struct affs_data_head *)(bh)->b_data)
25 #define AFFS_DATA(bh) (((struct affs_data_head *)(bh)->b_data)->data)
27 #define AFFS_CACHE_SIZE PAGE_SIZE
29 #define AFFS_LC_SIZE (AFFS_CACHE_SIZE/sizeof(u32)/2)
30 #define AFFS_AC_SIZE (AFFS_CACHE_SIZE/sizeof(struct affs_ext_key)/2)
31 #define AFFS_AC_MASK (AFFS_AC_SIZE-1)
33 #define AFFSNAMEMAX 30U
36 u32 ext
; /* idx of the extended block */
37 u32 key
; /* block number */
41 * affs fs inode data in memory
43 struct affs_inode_info
{
45 struct semaphore i_link_lock
; /* Protects internal inode access. */
46 struct semaphore i_ext_lock
; /* Protects internal inode access. */
47 #define i_hash_lock i_ext_lock
48 u32 i_blkcnt
; /* block count */
49 u32 i_extcnt
; /* extended block count */
50 u32
*i_lc
; /* linear cache of extended blocks */
54 struct affs_ext_key
*i_ac
; /* associative cache of extended blocks */
55 u32 i_ext_last
; /* last accessed extended block */
56 struct buffer_head
*i_ext_bh
; /* bh of last extended block */
58 u32 i_protect
; /* unused attribute bits */
59 u32 i_lastalloc
; /* last allocated block */
60 int i_pa_cnt
; /* number of preallocated blocks */
61 struct inode vfs_inode
;
64 /* short cut to get to the affs specific inode data */
65 static inline struct affs_inode_info
*AFFS_I(struct inode
*inode
)
67 return list_entry(inode
, struct affs_inode_info
, vfs_inode
);
71 * super-block data in memory
73 * Block numbers are adjusted for their actual size
78 u32 bm_key
; /* Disk block number */
79 u32 bm_free
; /* Free blocks in here */
83 int s_partition_size
; /* Partition size in blocks. */
84 int s_reserved
; /* Number of reserved blocks. */
85 //u32 s_blksize; /* Initial device blksize */
86 u32 s_data_blksize
; /* size of the data block w/o header */
87 u32 s_root_block
; /* FFS root block number. */
88 int s_hashsize
; /* Size of hash table. */
89 unsigned long s_flags
; /* See below. */
90 kuid_t s_uid
; /* uid to override */
91 kgid_t s_gid
; /* gid to override */
92 umode_t s_mode
; /* mode to override */
93 struct buffer_head
*s_root_bh
; /* Cached root block. */
94 struct mutex s_bmlock
; /* Protects bitmap access. */
95 struct affs_bm_info
*s_bitmap
; /* Bitmap infos. */
96 u32 s_bmap_count
; /* # of bitmap blocks. */
97 u32 s_bmap_bits
; /* # of bits in one bitmap blocks */
99 struct buffer_head
*s_bmap_bh
;
100 char *s_prefix
; /* Prefix for volumes and assigns. */
101 char s_volume
[32]; /* Volume prefix for absolute symlinks. */
102 spinlock_t symlink_lock
; /* protects the previous two */
103 struct super_block
*sb
; /* the VFS superblock object */
104 int work_queued
; /* non-zero delayed work is queued */
105 struct delayed_work sb_work
; /* superblock flush delayed work */
106 spinlock_t work_lock
; /* protects sb_work and work_queued */
109 #define SF_INTL 0x0001 /* International filesystem. */
110 #define SF_BM_VALID 0x0002 /* Bitmap is valid. */
111 #define SF_IMMUTABLE 0x0004 /* Protection bits cannot be changed */
112 #define SF_QUIET 0x0008 /* chmod errors will be not reported */
113 #define SF_SETUID 0x0010 /* Ignore Amiga uid */
114 #define SF_SETGID 0x0020 /* Ignore Amiga gid */
115 #define SF_SETMODE 0x0040 /* Ignore Amiga protection bits */
116 #define SF_MUFS 0x0100 /* Use MUFS uid/gid mapping */
117 #define SF_OFS 0x0200 /* Old filesystem */
118 #define SF_PREFIX 0x0400 /* Buffer for prefix is allocated */
119 #define SF_VERBOSE 0x0800 /* Talk about fs when mounting */
120 #define SF_NO_TRUNCATE 0x1000 /* Don't truncate filenames */
122 /* short cut to get to the affs specific sb data */
123 static inline struct affs_sb_info
*AFFS_SB(struct super_block
*sb
)
125 return sb
->s_fs_info
;
128 void affs_mark_sb_dirty(struct super_block
*sb
);
132 extern int affs_insert_hash(struct inode
*inode
, struct buffer_head
*bh
);
133 extern int affs_remove_hash(struct inode
*dir
, struct buffer_head
*rem_bh
);
134 extern int affs_remove_header(struct dentry
*dentry
);
135 extern u32
affs_checksum_block(struct super_block
*sb
, struct buffer_head
*bh
);
136 extern void affs_fix_checksum(struct super_block
*sb
, struct buffer_head
*bh
);
137 extern void secs_to_datestamp(time_t secs
, struct affs_date
*ds
);
138 extern umode_t
prot_to_mode(u32 prot
);
139 extern void mode_to_prot(struct inode
*inode
);
141 extern void affs_error(struct super_block
*sb
, const char *function
,
142 const char *fmt
, ...);
144 extern void affs_warning(struct super_block
*sb
, const char *function
,
145 const char *fmt
, ...);
146 extern bool affs_nofilenametruncate(const struct dentry
*dentry
);
147 extern int affs_check_name(const unsigned char *name
, int len
,
149 extern int affs_copy_name(unsigned char *bstr
, struct dentry
*dentry
);
153 extern u32
affs_count_free_blocks(struct super_block
*s
);
154 extern void affs_free_block(struct super_block
*sb
, u32 block
);
155 extern u32
affs_alloc_block(struct inode
*inode
, u32 goal
);
156 extern int affs_init_bitmap(struct super_block
*sb
, int *flags
);
157 extern void affs_free_bitmap(struct super_block
*sb
);
161 extern int affs_hash_name(struct super_block
*sb
, const u8
*name
, unsigned int len
);
162 extern struct dentry
*affs_lookup(struct inode
*dir
, struct dentry
*dentry
, unsigned int);
163 extern int affs_unlink(struct inode
*dir
, struct dentry
*dentry
);
164 extern int affs_create(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
, bool);
165 extern int affs_mkdir(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
);
166 extern int affs_rmdir(struct inode
*dir
, struct dentry
*dentry
);
167 extern int affs_link(struct dentry
*olddentry
, struct inode
*dir
,
168 struct dentry
*dentry
);
169 extern int affs_symlink(struct inode
*dir
, struct dentry
*dentry
,
170 const char *symname
);
171 extern int affs_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
172 struct inode
*new_dir
, struct dentry
*new_dentry
);
176 extern unsigned long affs_parent_ino(struct inode
*dir
);
177 extern struct inode
*affs_new_inode(struct inode
*dir
);
178 extern int affs_notify_change(struct dentry
*dentry
, struct iattr
*attr
);
179 extern void affs_evict_inode(struct inode
*inode
);
180 extern struct inode
*affs_iget(struct super_block
*sb
,
182 extern int affs_write_inode(struct inode
*inode
,
183 struct writeback_control
*wbc
);
184 extern int affs_add_entry(struct inode
*dir
, struct inode
*inode
, struct dentry
*dentry
, s32 type
);
188 void affs_free_prealloc(struct inode
*inode
);
189 extern void affs_truncate(struct inode
*);
190 int affs_file_fsync(struct file
*, loff_t
, loff_t
, int);
194 extern void affs_dir_truncate(struct inode
*);
198 extern const struct inode_operations affs_file_inode_operations
;
199 extern const struct inode_operations affs_dir_inode_operations
;
200 extern const struct inode_operations affs_symlink_inode_operations
;
201 extern const struct file_operations affs_file_operations
;
202 extern const struct file_operations affs_file_operations_ofs
;
203 extern const struct file_operations affs_dir_operations
;
204 extern const struct address_space_operations affs_symlink_aops
;
205 extern const struct address_space_operations affs_aops
;
206 extern const struct address_space_operations affs_aops_ofs
;
208 extern const struct dentry_operations affs_dentry_operations
;
209 extern const struct dentry_operations affs_intl_dentry_operations
;
212 affs_set_blocksize(struct super_block
*sb
, int size
)
214 sb_set_blocksize(sb
, size
);
216 static inline struct buffer_head
*
217 affs_bread(struct super_block
*sb
, int block
)
219 pr_debug("%s: %d\n", __func__
, block
);
220 if (block
>= AFFS_SB(sb
)->s_reserved
&& block
< AFFS_SB(sb
)->s_partition_size
)
221 return sb_bread(sb
, block
);
224 static inline struct buffer_head
*
225 affs_getblk(struct super_block
*sb
, int block
)
227 pr_debug("%s: %d\n", __func__
, block
);
228 if (block
>= AFFS_SB(sb
)->s_reserved
&& block
< AFFS_SB(sb
)->s_partition_size
)
229 return sb_getblk(sb
, block
);
232 static inline struct buffer_head
*
233 affs_getzeroblk(struct super_block
*sb
, int block
)
235 struct buffer_head
*bh
;
236 pr_debug("%s: %d\n", __func__
, block
);
237 if (block
>= AFFS_SB(sb
)->s_reserved
&& block
< AFFS_SB(sb
)->s_partition_size
) {
238 bh
= sb_getblk(sb
, block
);
240 memset(bh
->b_data
, 0 , sb
->s_blocksize
);
241 set_buffer_uptodate(bh
);
247 static inline struct buffer_head
*
248 affs_getemptyblk(struct super_block
*sb
, int block
)
250 struct buffer_head
*bh
;
251 pr_debug("%s: %d\n", __func__
, block
);
252 if (block
>= AFFS_SB(sb
)->s_reserved
&& block
< AFFS_SB(sb
)->s_partition_size
) {
253 bh
= sb_getblk(sb
, block
);
255 set_buffer_uptodate(bh
);
261 affs_brelse(struct buffer_head
*bh
)
264 pr_debug("%s: %lld\n", __func__
, (long long) bh
->b_blocknr
);
269 affs_adjust_checksum(struct buffer_head
*bh
, u32 val
)
271 u32 tmp
= be32_to_cpu(((__be32
*)bh
->b_data
)[5]);
272 ((__be32
*)bh
->b_data
)[5] = cpu_to_be32(tmp
- val
);
275 affs_adjust_bitmapchecksum(struct buffer_head
*bh
, u32 val
)
277 u32 tmp
= be32_to_cpu(((__be32
*)bh
->b_data
)[0]);
278 ((__be32
*)bh
->b_data
)[0] = cpu_to_be32(tmp
- val
);
282 affs_lock_link(struct inode
*inode
)
284 down(&AFFS_I(inode
)->i_link_lock
);
287 affs_unlock_link(struct inode
*inode
)
289 up(&AFFS_I(inode
)->i_link_lock
);
292 affs_lock_dir(struct inode
*inode
)
294 down(&AFFS_I(inode
)->i_hash_lock
);
297 affs_unlock_dir(struct inode
*inode
)
299 up(&AFFS_I(inode
)->i_hash_lock
);
302 affs_lock_ext(struct inode
*inode
)
304 down(&AFFS_I(inode
)->i_ext_lock
);
307 affs_unlock_ext(struct inode
*inode
)
309 up(&AFFS_I(inode
)->i_ext_lock
);