]>
Commit | Line | Data |
---|---|---|
0158de12 FF |
1 | #ifdef pr_fmt |
2 | #undef pr_fmt | |
3 | #endif | |
4 | ||
5 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
6 | ||
1da177e4 LT |
7 | #include <linux/types.h> |
8 | #include <linux/fs.h> | |
9 | #include <linux/buffer_head.h> | |
1da177e4 | 10 | #include <linux/amigaffs.h> |
7d135a5d | 11 | #include <linux/mutex.h> |
3dd84782 | 12 | #include <linux/workqueue.h> |
1da177e4 | 13 | |
1da177e4 LT |
14 | /* Ugly macros make the code more pretty. */ |
15 | ||
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)]) | |
19 | ||
1da177e4 LT |
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) | |
26 | ||
27 | #define AFFS_CACHE_SIZE PAGE_SIZE | |
28 | ||
1da177e4 LT |
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) | |
32 | ||
33 | struct affs_ext_key { | |
34 | u32 ext; /* idx of the extended block */ | |
35 | u32 key; /* block number */ | |
36 | }; | |
37 | ||
38 | /* | |
39 | * affs fs inode data in memory | |
40 | */ | |
41 | struct affs_inode_info { | |
dca3c336 | 42 | atomic_t i_opencnt; |
1da177e4 LT |
43 | struct semaphore i_link_lock; /* Protects internal inode access. */ |
44 | struct semaphore i_ext_lock; /* Protects internal inode access. */ | |
45 | #define i_hash_lock i_ext_lock | |
46 | u32 i_blkcnt; /* block count */ | |
47 | u32 i_extcnt; /* extended block count */ | |
48 | u32 *i_lc; /* linear cache of extended blocks */ | |
49 | u32 i_lc_size; | |
50 | u32 i_lc_shift; | |
51 | u32 i_lc_mask; | |
52 | struct affs_ext_key *i_ac; /* associative cache of extended blocks */ | |
53 | u32 i_ext_last; /* last accessed extended block */ | |
54 | struct buffer_head *i_ext_bh; /* bh of last extended block */ | |
55 | loff_t mmu_private; | |
56 | u32 i_protect; /* unused attribute bits */ | |
57 | u32 i_lastalloc; /* last allocated block */ | |
58 | int i_pa_cnt; /* number of preallocated blocks */ | |
59 | struct inode vfs_inode; | |
60 | }; | |
61 | ||
62 | /* short cut to get to the affs specific inode data */ | |
63 | static inline struct affs_inode_info *AFFS_I(struct inode *inode) | |
64 | { | |
65 | return list_entry(inode, struct affs_inode_info, vfs_inode); | |
66 | } | |
67 | ||
68 | /* | |
69 | * super-block data in memory | |
70 | * | |
71 | * Block numbers are adjusted for their actual size | |
72 | * | |
73 | */ | |
74 | ||
75 | struct affs_bm_info { | |
76 | u32 bm_key; /* Disk block number */ | |
77 | u32 bm_free; /* Free blocks in here */ | |
78 | }; | |
79 | ||
80 | struct affs_sb_info { | |
81 | int s_partition_size; /* Partition size in blocks. */ | |
82 | int s_reserved; /* Number of reserved blocks. */ | |
83 | //u32 s_blksize; /* Initial device blksize */ | |
84 | u32 s_data_blksize; /* size of the data block w/o header */ | |
85 | u32 s_root_block; /* FFS root block number. */ | |
86 | int s_hashsize; /* Size of hash table. */ | |
87 | unsigned long s_flags; /* See below. */ | |
8fed10be EB |
88 | kuid_t s_uid; /* uid to override */ |
89 | kgid_t s_gid; /* gid to override */ | |
1da177e4 LT |
90 | umode_t s_mode; /* mode to override */ |
91 | struct buffer_head *s_root_bh; /* Cached root block. */ | |
7d135a5d | 92 | struct mutex s_bmlock; /* Protects bitmap access. */ |
1da177e4 LT |
93 | struct affs_bm_info *s_bitmap; /* Bitmap infos. */ |
94 | u32 s_bmap_count; /* # of bitmap blocks. */ | |
95 | u32 s_bmap_bits; /* # of bits in one bitmap blocks */ | |
96 | u32 s_last_bmap; | |
97 | struct buffer_head *s_bmap_bh; | |
98 | char *s_prefix; /* Prefix for volumes and assigns. */ | |
1da177e4 | 99 | char s_volume[32]; /* Volume prefix for absolute symlinks. */ |
29333920 | 100 | spinlock_t symlink_lock; /* protects the previous two */ |
a215fef7 | 101 | struct super_block *sb; /* the VFS superblock object */ |
3dd84782 AB |
102 | int work_queued; /* non-zero delayed work is queued */ |
103 | struct delayed_work sb_work; /* superblock flush delayed work */ | |
104 | spinlock_t work_lock; /* protects sb_work and work_queued */ | |
1da177e4 LT |
105 | }; |
106 | ||
107 | #define SF_INTL 0x0001 /* International filesystem. */ | |
108 | #define SF_BM_VALID 0x0002 /* Bitmap is valid. */ | |
109 | #define SF_IMMUTABLE 0x0004 /* Protection bits cannot be changed */ | |
110 | #define SF_QUIET 0x0008 /* chmod errors will be not reported */ | |
111 | #define SF_SETUID 0x0010 /* Ignore Amiga uid */ | |
112 | #define SF_SETGID 0x0020 /* Ignore Amiga gid */ | |
113 | #define SF_SETMODE 0x0040 /* Ignore Amiga protection bits */ | |
114 | #define SF_MUFS 0x0100 /* Use MUFS uid/gid mapping */ | |
115 | #define SF_OFS 0x0200 /* Old filesystem */ | |
116 | #define SF_PREFIX 0x0400 /* Buffer for prefix is allocated */ | |
117 | #define SF_VERBOSE 0x0800 /* Talk about fs when mounting */ | |
8ca57722 | 118 | #define SF_NO_TRUNCATE 0x1000 /* Don't truncate filenames */ |
1da177e4 LT |
119 | |
120 | /* short cut to get to the affs specific sb data */ | |
121 | static inline struct affs_sb_info *AFFS_SB(struct super_block *sb) | |
122 | { | |
123 | return sb->s_fs_info; | |
124 | } | |
125 | ||
3dd84782 AB |
126 | void affs_mark_sb_dirty(struct super_block *sb); |
127 | ||
1da177e4 LT |
128 | /* amigaffs.c */ |
129 | ||
130 | extern int affs_insert_hash(struct inode *inode, struct buffer_head *bh); | |
131 | extern int affs_remove_hash(struct inode *dir, struct buffer_head *rem_bh); | |
132 | extern int affs_remove_header(struct dentry *dentry); | |
133 | extern u32 affs_checksum_block(struct super_block *sb, struct buffer_head *bh); | |
134 | extern void affs_fix_checksum(struct super_block *sb, struct buffer_head *bh); | |
135 | extern void secs_to_datestamp(time_t secs, struct affs_date *ds); | |
a760b03d | 136 | extern umode_t prot_to_mode(u32 prot); |
1da177e4 | 137 | extern void mode_to_prot(struct inode *inode); |
8ca57722 FF |
138 | extern void affs_error(struct super_block *sb, const char *function, |
139 | const char *fmt, ...); | |
140 | extern void affs_warning(struct super_block *sb, const char *function, | |
141 | const char *fmt, ...); | |
142 | extern bool affs_nofilenametruncate(const struct dentry *dentry); | |
143 | extern int affs_check_name(const unsigned char *name, int len, | |
144 | bool notruncate); | |
1da177e4 LT |
145 | extern int affs_copy_name(unsigned char *bstr, struct dentry *dentry); |
146 | ||
147 | /* bitmap. c */ | |
148 | ||
149 | extern u32 affs_count_free_blocks(struct super_block *s); | |
150 | extern void affs_free_block(struct super_block *sb, u32 block); | |
151 | extern u32 affs_alloc_block(struct inode *inode, u32 goal); | |
152 | extern int affs_init_bitmap(struct super_block *sb, int *flags); | |
153 | extern void affs_free_bitmap(struct super_block *sb); | |
154 | ||
155 | /* namei.c */ | |
156 | ||
157 | extern int affs_hash_name(struct super_block *sb, const u8 *name, unsigned int len); | |
00cd8dd3 | 158 | extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int); |
1da177e4 | 159 | extern int affs_unlink(struct inode *dir, struct dentry *dentry); |
ebfc3b49 | 160 | extern int affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool); |
18bb1db3 | 161 | extern int affs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode); |
1da177e4 LT |
162 | extern int affs_rmdir(struct inode *dir, struct dentry *dentry); |
163 | extern int affs_link(struct dentry *olddentry, struct inode *dir, | |
164 | struct dentry *dentry); | |
165 | extern int affs_symlink(struct inode *dir, struct dentry *dentry, | |
166 | const char *symname); | |
167 | extern int affs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
168 | struct inode *new_dir, struct dentry *new_dentry); | |
169 | ||
170 | /* inode.c */ | |
171 | ||
172 | extern unsigned long affs_parent_ino(struct inode *dir); | |
173 | extern struct inode *affs_new_inode(struct inode *dir); | |
174 | extern int affs_notify_change(struct dentry *dentry, struct iattr *attr); | |
f053ddde | 175 | extern void affs_evict_inode(struct inode *inode); |
210f8559 DH |
176 | extern struct inode *affs_iget(struct super_block *sb, |
177 | unsigned long ino); | |
a9185b41 CH |
178 | extern int affs_write_inode(struct inode *inode, |
179 | struct writeback_control *wbc); | |
1da177e4 LT |
180 | extern int affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type); |
181 | ||
182 | /* file.c */ | |
183 | ||
184 | void affs_free_prealloc(struct inode *inode); | |
185 | extern void affs_truncate(struct inode *); | |
02c24a82 | 186 | int affs_file_fsync(struct file *, loff_t, loff_t, int); |
1da177e4 LT |
187 | |
188 | /* dir.c */ | |
189 | ||
190 | extern void affs_dir_truncate(struct inode *); | |
191 | ||
192 | /* jump tables */ | |
193 | ||
754661f1 AV |
194 | extern const struct inode_operations affs_file_inode_operations; |
195 | extern const struct inode_operations affs_dir_inode_operations; | |
196 | extern const struct inode_operations affs_symlink_inode_operations; | |
4b6f5d20 AV |
197 | extern const struct file_operations affs_file_operations; |
198 | extern const struct file_operations affs_file_operations_ofs; | |
199 | extern const struct file_operations affs_dir_operations; | |
f5e54d6e CH |
200 | extern const struct address_space_operations affs_symlink_aops; |
201 | extern const struct address_space_operations affs_aops; | |
202 | extern const struct address_space_operations affs_aops_ofs; | |
1da177e4 | 203 | |
e16404ed | 204 | extern const struct dentry_operations affs_dentry_operations; |
a129880d | 205 | extern const struct dentry_operations affs_intl_dentry_operations; |
1da177e4 LT |
206 | |
207 | static inline void | |
208 | affs_set_blocksize(struct super_block *sb, int size) | |
209 | { | |
210 | sb_set_blocksize(sb, size); | |
211 | } | |
212 | static inline struct buffer_head * | |
213 | affs_bread(struct super_block *sb, int block) | |
214 | { | |
215 | pr_debug("affs_bread: %d\n", block); | |
216 | if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) | |
217 | return sb_bread(sb, block); | |
218 | return NULL; | |
219 | } | |
220 | static inline struct buffer_head * | |
221 | affs_getblk(struct super_block *sb, int block) | |
222 | { | |
223 | pr_debug("affs_getblk: %d\n", block); | |
224 | if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) | |
225 | return sb_getblk(sb, block); | |
226 | return NULL; | |
227 | } | |
228 | static inline struct buffer_head * | |
229 | affs_getzeroblk(struct super_block *sb, int block) | |
230 | { | |
231 | struct buffer_head *bh; | |
232 | pr_debug("affs_getzeroblk: %d\n", block); | |
233 | if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) { | |
234 | bh = sb_getblk(sb, block); | |
235 | lock_buffer(bh); | |
236 | memset(bh->b_data, 0 , sb->s_blocksize); | |
237 | set_buffer_uptodate(bh); | |
238 | unlock_buffer(bh); | |
239 | return bh; | |
240 | } | |
241 | return NULL; | |
242 | } | |
243 | static inline struct buffer_head * | |
244 | affs_getemptyblk(struct super_block *sb, int block) | |
245 | { | |
246 | struct buffer_head *bh; | |
247 | pr_debug("affs_getemptyblk: %d\n", block); | |
248 | if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) { | |
249 | bh = sb_getblk(sb, block); | |
250 | wait_on_buffer(bh); | |
251 | set_buffer_uptodate(bh); | |
252 | return bh; | |
253 | } | |
254 | return NULL; | |
255 | } | |
256 | static inline void | |
257 | affs_brelse(struct buffer_head *bh) | |
258 | { | |
259 | if (bh) | |
260 | pr_debug("affs_brelse: %lld\n", (long long) bh->b_blocknr); | |
261 | brelse(bh); | |
262 | } | |
263 | ||
264 | static inline void | |
265 | affs_adjust_checksum(struct buffer_head *bh, u32 val) | |
266 | { | |
267 | u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[5]); | |
268 | ((__be32 *)bh->b_data)[5] = cpu_to_be32(tmp - val); | |
269 | } | |
270 | static inline void | |
271 | affs_adjust_bitmapchecksum(struct buffer_head *bh, u32 val) | |
272 | { | |
273 | u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[0]); | |
274 | ((__be32 *)bh->b_data)[0] = cpu_to_be32(tmp - val); | |
275 | } | |
276 | ||
277 | static inline void | |
278 | affs_lock_link(struct inode *inode) | |
279 | { | |
280 | down(&AFFS_I(inode)->i_link_lock); | |
281 | } | |
282 | static inline void | |
283 | affs_unlock_link(struct inode *inode) | |
284 | { | |
285 | up(&AFFS_I(inode)->i_link_lock); | |
286 | } | |
287 | static inline void | |
288 | affs_lock_dir(struct inode *inode) | |
289 | { | |
290 | down(&AFFS_I(inode)->i_hash_lock); | |
291 | } | |
292 | static inline void | |
293 | affs_unlock_dir(struct inode *inode) | |
294 | { | |
295 | up(&AFFS_I(inode)->i_hash_lock); | |
296 | } | |
297 | static inline void | |
298 | affs_lock_ext(struct inode *inode) | |
299 | { | |
300 | down(&AFFS_I(inode)->i_ext_lock); | |
301 | } | |
302 | static inline void | |
303 | affs_unlock_ext(struct inode *inode) | |
304 | { | |
305 | up(&AFFS_I(inode)->i_ext_lock); | |
306 | } |