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Commit | Line | Data |
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1da177e4 LT |
1 | #include <linux/types.h> |
2 | #include <linux/fs.h> | |
3 | #include <linux/buffer_head.h> | |
1da177e4 | 4 | #include <linux/amigaffs.h> |
7d135a5d | 5 | #include <linux/mutex.h> |
3dd84782 | 6 | #include <linux/workqueue.h> |
1da177e4 | 7 | |
1da177e4 LT |
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 | ||
1da177e4 LT |
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 | ||
1da177e4 LT |
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 | ||
27 | struct 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 | */ | |
35 | struct affs_inode_info { | |
dca3c336 | 36 | atomic_t i_opencnt; |
1da177e4 LT |
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 */ | |
57 | static 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 | ||
69 | struct affs_bm_info { | |
70 | u32 bm_key; /* Disk block number */ | |
71 | u32 bm_free; /* Free blocks in here */ | |
72 | }; | |
73 | ||
74 | struct 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. */ | |
8fed10be EB |
82 | kuid_t s_uid; /* uid to override */ |
83 | kgid_t s_gid; /* gid to override */ | |
1da177e4 LT |
84 | umode_t s_mode; /* mode to override */ |
85 | struct buffer_head *s_root_bh; /* Cached root block. */ | |
7d135a5d | 86 | struct mutex s_bmlock; /* Protects bitmap access. */ |
1da177e4 LT |
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. */ | |
1da177e4 | 93 | char s_volume[32]; /* Volume prefix for absolute symlinks. */ |
29333920 | 94 | spinlock_t symlink_lock; /* protects the previous two */ |
a215fef7 | 95 | struct super_block *sb; /* the VFS superblock object */ |
3dd84782 AB |
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 */ | |
1da177e4 LT |
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 */ | |
8ca57722 | 112 | #define SF_NO_TRUNCATE 0x1000 /* Don't truncate filenames */ |
1da177e4 LT |
113 | |
114 | /* short cut to get to the affs specific sb data */ | |
115 | static inline struct affs_sb_info *AFFS_SB(struct super_block *sb) | |
116 | { | |
117 | return sb->s_fs_info; | |
118 | } | |
119 | ||
3dd84782 AB |
120 | void affs_mark_sb_dirty(struct super_block *sb); |
121 | ||
1da177e4 LT |
122 | /* amigaffs.c */ |
123 | ||
124 | extern int affs_insert_hash(struct inode *inode, struct buffer_head *bh); | |
125 | extern int affs_remove_hash(struct inode *dir, struct buffer_head *rem_bh); | |
126 | extern int affs_remove_header(struct dentry *dentry); | |
127 | extern u32 affs_checksum_block(struct super_block *sb, struct buffer_head *bh); | |
128 | extern void affs_fix_checksum(struct super_block *sb, struct buffer_head *bh); | |
129 | extern void secs_to_datestamp(time_t secs, struct affs_date *ds); | |
a760b03d | 130 | extern umode_t prot_to_mode(u32 prot); |
1da177e4 | 131 | extern void mode_to_prot(struct inode *inode); |
8ca57722 FF |
132 | extern void affs_error(struct super_block *sb, const char *function, |
133 | const char *fmt, ...); | |
134 | extern void affs_warning(struct super_block *sb, const char *function, | |
135 | const char *fmt, ...); | |
136 | extern bool affs_nofilenametruncate(const struct dentry *dentry); | |
137 | extern int affs_check_name(const unsigned char *name, int len, | |
138 | bool notruncate); | |
1da177e4 LT |
139 | extern int affs_copy_name(unsigned char *bstr, struct dentry *dentry); |
140 | ||
141 | /* bitmap. c */ | |
142 | ||
143 | extern u32 affs_count_free_blocks(struct super_block *s); | |
144 | extern void affs_free_block(struct super_block *sb, u32 block); | |
145 | extern u32 affs_alloc_block(struct inode *inode, u32 goal); | |
146 | extern int affs_init_bitmap(struct super_block *sb, int *flags); | |
147 | extern void affs_free_bitmap(struct super_block *sb); | |
148 | ||
149 | /* namei.c */ | |
150 | ||
151 | extern int affs_hash_name(struct super_block *sb, const u8 *name, unsigned int len); | |
00cd8dd3 | 152 | extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int); |
1da177e4 | 153 | extern int affs_unlink(struct inode *dir, struct dentry *dentry); |
ebfc3b49 | 154 | extern int affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool); |
18bb1db3 | 155 | extern int affs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode); |
1da177e4 LT |
156 | extern int affs_rmdir(struct inode *dir, struct dentry *dentry); |
157 | extern int affs_link(struct dentry *olddentry, struct inode *dir, | |
158 | struct dentry *dentry); | |
159 | extern int affs_symlink(struct inode *dir, struct dentry *dentry, | |
160 | const char *symname); | |
161 | extern 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 | ||
166 | extern unsigned long affs_parent_ino(struct inode *dir); | |
167 | extern struct inode *affs_new_inode(struct inode *dir); | |
168 | extern int affs_notify_change(struct dentry *dentry, struct iattr *attr); | |
f053ddde | 169 | extern void affs_evict_inode(struct inode *inode); |
210f8559 DH |
170 | extern struct inode *affs_iget(struct super_block *sb, |
171 | unsigned long ino); | |
a9185b41 CH |
172 | extern int affs_write_inode(struct inode *inode, |
173 | struct writeback_control *wbc); | |
1da177e4 LT |
174 | extern int affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type); |
175 | ||
176 | /* file.c */ | |
177 | ||
178 | void affs_free_prealloc(struct inode *inode); | |
179 | extern void affs_truncate(struct inode *); | |
02c24a82 | 180 | int affs_file_fsync(struct file *, loff_t, loff_t, int); |
1da177e4 LT |
181 | |
182 | /* dir.c */ | |
183 | ||
184 | extern void affs_dir_truncate(struct inode *); | |
185 | ||
186 | /* jump tables */ | |
187 | ||
754661f1 AV |
188 | extern const struct inode_operations affs_file_inode_operations; |
189 | extern const struct inode_operations affs_dir_inode_operations; | |
190 | extern const struct inode_operations affs_symlink_inode_operations; | |
4b6f5d20 AV |
191 | extern const struct file_operations affs_file_operations; |
192 | extern const struct file_operations affs_file_operations_ofs; | |
193 | extern const struct file_operations affs_dir_operations; | |
f5e54d6e CH |
194 | extern const struct address_space_operations affs_symlink_aops; |
195 | extern const struct address_space_operations affs_aops; | |
196 | extern const struct address_space_operations affs_aops_ofs; | |
1da177e4 | 197 | |
e16404ed | 198 | extern const struct dentry_operations affs_dentry_operations; |
a129880d | 199 | extern const struct dentry_operations affs_intl_dentry_operations; |
1da177e4 LT |
200 | |
201 | static inline void | |
202 | affs_set_blocksize(struct super_block *sb, int size) | |
203 | { | |
204 | sb_set_blocksize(sb, size); | |
205 | } | |
206 | static inline struct buffer_head * | |
207 | affs_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 | } | |
214 | static inline struct buffer_head * | |
215 | affs_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 | } | |
222 | static inline struct buffer_head * | |
223 | affs_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 | } | |
237 | static inline struct buffer_head * | |
238 | affs_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 | } | |
250 | static inline void | |
251 | affs_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 | ||
258 | static inline void | |
259 | affs_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 | } | |
264 | static inline void | |
265 | affs_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 | ||
271 | static inline void | |
272 | affs_lock_link(struct inode *inode) | |
273 | { | |
274 | down(&AFFS_I(inode)->i_link_lock); | |
275 | } | |
276 | static inline void | |
277 | affs_unlock_link(struct inode *inode) | |
278 | { | |
279 | up(&AFFS_I(inode)->i_link_lock); | |
280 | } | |
281 | static inline void | |
282 | affs_lock_dir(struct inode *inode) | |
283 | { | |
284 | down(&AFFS_I(inode)->i_hash_lock); | |
285 | } | |
286 | static inline void | |
287 | affs_unlock_dir(struct inode *inode) | |
288 | { | |
289 | up(&AFFS_I(inode)->i_hash_lock); | |
290 | } | |
291 | static inline void | |
292 | affs_lock_ext(struct inode *inode) | |
293 | { | |
294 | down(&AFFS_I(inode)->i_ext_lock); | |
295 | } | |
296 | static inline void | |
297 | affs_unlock_ext(struct inode *inode) | |
298 | { | |
299 | up(&AFFS_I(inode)->i_ext_lock); | |
300 | } |