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Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
0158de12 FF |
2 | #ifdef pr_fmt |
3 | #undef pr_fmt | |
4 | #endif | |
5 | ||
6 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
7 | ||
1da177e4 LT |
8 | #include <linux/types.h> |
9 | #include <linux/fs.h> | |
10 | #include <linux/buffer_head.h> | |
d2d58e0e | 11 | #include "amigaffs.h" |
7d135a5d | 12 | #include <linux/mutex.h> |
3dd84782 | 13 | #include <linux/workqueue.h> |
1da177e4 | 14 | |
1da177e4 LT |
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 | ||
1da177e4 LT |
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 | ||
1da177e4 LT |
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 | ||
f157853e FF |
34 | #define AFFSNAMEMAX 30U |
35 | ||
1da177e4 LT |
36 | struct 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 | */ | |
44 | struct affs_inode_info { | |
dca3c336 | 45 | atomic_t i_opencnt; |
6060c07d DB |
46 | struct mutex i_link_lock; /* Protects internal inode access. */ |
47 | struct mutex i_ext_lock; /* Protects internal inode access. */ | |
1da177e4 LT |
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 */ | |
66 | static inline struct affs_inode_info *AFFS_I(struct inode *inode) | |
67 | { | |
db6172c4 | 68 | return container_of(inode, struct affs_inode_info, vfs_inode); |
1da177e4 LT |
69 | } |
70 | ||
71 | /* | |
72 | * super-block data in memory | |
73 | * | |
74 | * Block numbers are adjusted for their actual size | |
75 | * | |
76 | */ | |
77 | ||
78 | struct affs_bm_info { | |
79 | u32 bm_key; /* Disk block number */ | |
80 | u32 bm_free; /* Free blocks in here */ | |
81 | }; | |
82 | ||
83 | struct 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. */ | |
8fed10be EB |
91 | kuid_t s_uid; /* uid to override */ |
92 | kgid_t s_gid; /* gid to override */ | |
1da177e4 LT |
93 | umode_t s_mode; /* mode to override */ |
94 | struct buffer_head *s_root_bh; /* Cached root block. */ | |
7d135a5d | 95 | struct mutex s_bmlock; /* Protects bitmap access. */ |
1da177e4 LT |
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. */ | |
1da177e4 | 102 | char s_volume[32]; /* Volume prefix for absolute symlinks. */ |
29333920 | 103 | spinlock_t symlink_lock; /* protects the previous two */ |
a215fef7 | 104 | struct super_block *sb; /* the VFS superblock object */ |
3dd84782 AB |
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 */ | |
1da177e4 LT |
108 | }; |
109 | ||
a0016ff2 FF |
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 */ | |
1da177e4 | 122 | |
6bf445ce FF |
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 | ||
1da177e4 LT |
127 | /* short cut to get to the affs specific sb data */ |
128 | static inline struct affs_sb_info *AFFS_SB(struct super_block *sb) | |
129 | { | |
130 | return sb->s_fs_info; | |
131 | } | |
132 | ||
3dd84782 AB |
133 | void affs_mark_sb_dirty(struct super_block *sb); |
134 | ||
1da177e4 LT |
135 | /* amigaffs.c */ |
136 | ||
137 | extern int affs_insert_hash(struct inode *inode, struct buffer_head *bh); | |
138 | extern int affs_remove_hash(struct inode *dir, struct buffer_head *rem_bh); | |
139 | extern int affs_remove_header(struct dentry *dentry); | |
140 | extern u32 affs_checksum_block(struct super_block *sb, struct buffer_head *bh); | |
141 | extern void affs_fix_checksum(struct super_block *sb, struct buffer_head *bh); | |
c1618208 FF |
142 | extern void affs_secs_to_datestamp(time64_t secs, struct affs_date *ds); |
143 | extern umode_t affs_prot_to_mode(u32 prot); | |
144 | extern void affs_mode_to_prot(struct inode *inode); | |
1ee54b09 | 145 | __printf(3, 4) |
8ca57722 FF |
146 | extern void affs_error(struct super_block *sb, const char *function, |
147 | const char *fmt, ...); | |
1ee54b09 | 148 | __printf(3, 4) |
8ca57722 FF |
149 | extern void affs_warning(struct super_block *sb, const char *function, |
150 | const char *fmt, ...); | |
151 | extern bool affs_nofilenametruncate(const struct dentry *dentry); | |
152 | extern int affs_check_name(const unsigned char *name, int len, | |
153 | bool notruncate); | |
1da177e4 LT |
154 | extern int affs_copy_name(unsigned char *bstr, struct dentry *dentry); |
155 | ||
156 | /* bitmap. c */ | |
157 | ||
158 | extern u32 affs_count_free_blocks(struct super_block *s); | |
159 | extern void affs_free_block(struct super_block *sb, u32 block); | |
160 | extern u32 affs_alloc_block(struct inode *inode, u32 goal); | |
161 | extern int affs_init_bitmap(struct super_block *sb, int *flags); | |
162 | extern void affs_free_bitmap(struct super_block *sb); | |
163 | ||
164 | /* namei.c */ | |
165 | ||
ed4433d7 | 166 | extern const struct export_operations affs_export_ops; |
1da177e4 | 167 | extern int affs_hash_name(struct super_block *sb, const u8 *name, unsigned int len); |
00cd8dd3 | 168 | extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int); |
1da177e4 | 169 | extern int affs_unlink(struct inode *dir, struct dentry *dentry); |
6c960e68 | 170 | extern int affs_create(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 CB |
171 | struct dentry *dentry, umode_t mode, bool); |
172 | extern int affs_mkdir(struct user_namespace *mnt_userns, struct inode *dir, | |
173 | struct dentry *dentry, umode_t mode); | |
1da177e4 LT |
174 | extern int affs_rmdir(struct inode *dir, struct dentry *dentry); |
175 | extern int affs_link(struct dentry *olddentry, struct inode *dir, | |
176 | struct dentry *dentry); | |
549c7297 CB |
177 | extern int affs_symlink(struct user_namespace *mnt_userns, |
178 | struct inode *dir, struct dentry *dentry, | |
179 | const char *symname); | |
180 | extern int affs_rename2(struct user_namespace *mnt_userns, | |
181 | struct inode *old_dir, struct dentry *old_dentry, | |
182 | struct inode *new_dir, struct dentry *new_dentry, | |
183 | unsigned int flags); | |
1da177e4 LT |
184 | |
185 | /* inode.c */ | |
186 | ||
1da177e4 | 187 | extern struct inode *affs_new_inode(struct inode *dir); |
c1632a0f | 188 | extern int affs_notify_change(struct mnt_idmap *idmap, |
549c7297 | 189 | struct dentry *dentry, struct iattr *attr); |
f053ddde | 190 | extern void affs_evict_inode(struct inode *inode); |
210f8559 DH |
191 | extern struct inode *affs_iget(struct super_block *sb, |
192 | unsigned long ino); | |
a9185b41 CH |
193 | extern int affs_write_inode(struct inode *inode, |
194 | struct writeback_control *wbc); | |
549c7297 CB |
195 | extern int affs_add_entry(struct inode *dir, struct inode *inode, |
196 | struct dentry *dentry, s32 type); | |
1da177e4 LT |
197 | |
198 | /* file.c */ | |
199 | ||
200 | void affs_free_prealloc(struct inode *inode); | |
201 | extern void affs_truncate(struct inode *); | |
02c24a82 | 202 | int affs_file_fsync(struct file *, loff_t, loff_t, int); |
1da177e4 LT |
203 | |
204 | /* dir.c */ | |
205 | ||
206 | extern void affs_dir_truncate(struct inode *); | |
207 | ||
208 | /* jump tables */ | |
209 | ||
754661f1 AV |
210 | extern const struct inode_operations affs_file_inode_operations; |
211 | extern const struct inode_operations affs_dir_inode_operations; | |
212 | extern const struct inode_operations affs_symlink_inode_operations; | |
4b6f5d20 AV |
213 | extern const struct file_operations affs_file_operations; |
214 | extern const struct file_operations affs_file_operations_ofs; | |
215 | extern const struct file_operations affs_dir_operations; | |
f5e54d6e CH |
216 | extern const struct address_space_operations affs_symlink_aops; |
217 | extern const struct address_space_operations affs_aops; | |
218 | extern const struct address_space_operations affs_aops_ofs; | |
1da177e4 | 219 | |
e16404ed | 220 | extern const struct dentry_operations affs_dentry_operations; |
a129880d | 221 | extern const struct dentry_operations affs_intl_dentry_operations; |
1da177e4 | 222 | |
d5de9fd5 FF |
223 | static inline bool affs_validblock(struct super_block *sb, int block) |
224 | { | |
225 | return(block >= AFFS_SB(sb)->s_reserved && | |
226 | block < AFFS_SB(sb)->s_partition_size); | |
227 | } | |
228 | ||
1da177e4 LT |
229 | static inline void |
230 | affs_set_blocksize(struct super_block *sb, int size) | |
231 | { | |
232 | sb_set_blocksize(sb, size); | |
233 | } | |
234 | static inline struct buffer_head * | |
235 | affs_bread(struct super_block *sb, int block) | |
236 | { | |
9606d9aa | 237 | pr_debug("%s: %d\n", __func__, block); |
d5de9fd5 | 238 | if (affs_validblock(sb, block)) |
1da177e4 LT |
239 | return sb_bread(sb, block); |
240 | return NULL; | |
241 | } | |
242 | static inline struct buffer_head * | |
243 | affs_getblk(struct super_block *sb, int block) | |
244 | { | |
9606d9aa | 245 | pr_debug("%s: %d\n", __func__, block); |
d5de9fd5 | 246 | if (affs_validblock(sb, block)) |
1da177e4 LT |
247 | return sb_getblk(sb, block); |
248 | return NULL; | |
249 | } | |
250 | static inline struct buffer_head * | |
251 | affs_getzeroblk(struct super_block *sb, int block) | |
252 | { | |
253 | struct buffer_head *bh; | |
9606d9aa | 254 | pr_debug("%s: %d\n", __func__, block); |
d5de9fd5 | 255 | if (affs_validblock(sb, block)) { |
1da177e4 LT |
256 | bh = sb_getblk(sb, block); |
257 | lock_buffer(bh); | |
258 | memset(bh->b_data, 0 , sb->s_blocksize); | |
259 | set_buffer_uptodate(bh); | |
260 | unlock_buffer(bh); | |
261 | return bh; | |
262 | } | |
263 | return NULL; | |
264 | } | |
265 | static inline struct buffer_head * | |
266 | affs_getemptyblk(struct super_block *sb, int block) | |
267 | { | |
268 | struct buffer_head *bh; | |
9606d9aa | 269 | pr_debug("%s: %d\n", __func__, block); |
d5de9fd5 | 270 | if (affs_validblock(sb, block)) { |
1da177e4 LT |
271 | bh = sb_getblk(sb, block); |
272 | wait_on_buffer(bh); | |
273 | set_buffer_uptodate(bh); | |
274 | return bh; | |
275 | } | |
276 | return NULL; | |
277 | } | |
278 | static inline void | |
279 | affs_brelse(struct buffer_head *bh) | |
280 | { | |
281 | if (bh) | |
9606d9aa | 282 | pr_debug("%s: %lld\n", __func__, (long long) bh->b_blocknr); |
1da177e4 LT |
283 | brelse(bh); |
284 | } | |
285 | ||
286 | static inline void | |
287 | affs_adjust_checksum(struct buffer_head *bh, u32 val) | |
288 | { | |
289 | u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[5]); | |
290 | ((__be32 *)bh->b_data)[5] = cpu_to_be32(tmp - val); | |
291 | } | |
292 | static inline void | |
293 | affs_adjust_bitmapchecksum(struct buffer_head *bh, u32 val) | |
294 | { | |
295 | u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[0]); | |
296 | ((__be32 *)bh->b_data)[0] = cpu_to_be32(tmp - val); | |
297 | } | |
298 | ||
299 | static inline void | |
300 | affs_lock_link(struct inode *inode) | |
301 | { | |
6060c07d | 302 | mutex_lock(&AFFS_I(inode)->i_link_lock); |
1da177e4 LT |
303 | } |
304 | static inline void | |
305 | affs_unlock_link(struct inode *inode) | |
306 | { | |
6060c07d | 307 | mutex_unlock(&AFFS_I(inode)->i_link_lock); |
1da177e4 LT |
308 | } |
309 | static inline void | |
310 | affs_lock_dir(struct inode *inode) | |
311 | { | |
6060c07d | 312 | mutex_lock_nested(&AFFS_I(inode)->i_hash_lock, SINGLE_DEPTH_NESTING); |
1da177e4 LT |
313 | } |
314 | static inline void | |
315 | affs_unlock_dir(struct inode *inode) | |
316 | { | |
6060c07d | 317 | mutex_unlock(&AFFS_I(inode)->i_hash_lock); |
1da177e4 LT |
318 | } |
319 | static inline void | |
320 | affs_lock_ext(struct inode *inode) | |
321 | { | |
6060c07d | 322 | mutex_lock(&AFFS_I(inode)->i_ext_lock); |
1da177e4 LT |
323 | } |
324 | static inline void | |
325 | affs_unlock_ext(struct inode *inode) | |
326 | { | |
6060c07d | 327 | mutex_unlock(&AFFS_I(inode)->i_ext_lock); |
1da177e4 | 328 | } |