1 #ifdef pr_fmt 2 #undef pr_fmt 3 #endif 4 5 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 6 7 #include <linux/types.h> 8 #include <linux/fs.h> 9 #include <linux/buffer_head.h> 10 #include <linux/amigaffs.h> 11 #include <linux/mutex.h> 12 #include <linux/workqueue.h> 13 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 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 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 #define AFFSNAMEMAX 30U 34 35 struct affs_ext_key { 36 u32 ext; /* idx of the extended block */ 37 u32 key; /* block number */ 38 }; 39 40 /* 41 * affs fs inode data in memory 42 */ 43 struct affs_inode_info { 44 atomic_t i_opencnt; 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 */ 51 u32 i_lc_size; 52 u32 i_lc_shift; 53 u32 i_lc_mask; 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 */ 57 loff_t mmu_private; 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; 62 }; 63 64 /* short cut to get to the affs specific inode data */ 65 static inline struct affs_inode_info *AFFS_I(struct inode *inode) 66 { 67 return list_entry(inode, struct affs_inode_info, vfs_inode); 68 } 69 70 /* 71 * super-block data in memory 72 * 73 * Block numbers are adjusted for their actual size 74 * 75 */ 76 77 struct affs_bm_info { 78 u32 bm_key; /* Disk block number */ 79 u32 bm_free; /* Free blocks in here */ 80 }; 81 82 struct affs_sb_info { 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 */ 98 u32 s_last_bmap; 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 */ 107 }; 108 109 #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 */ 121 122 /* short cut to get to the affs specific sb data */ 123 static inline struct affs_sb_info *AFFS_SB(struct super_block *sb) 124 { 125 return sb->s_fs_info; 126 } 127 128 void affs_mark_sb_dirty(struct super_block *sb); 129 130 /* amigaffs.c */ 131 132 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); 140 __printf(3, 4) 141 extern void affs_error(struct super_block *sb, const char *function, 142 const char *fmt, ...); 143 __printf(3, 4) 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, 148 bool notruncate); 149 extern int affs_copy_name(unsigned char *bstr, struct dentry *dentry); 150 151 /* bitmap. c */ 152 153 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); 158 159 /* namei.c */ 160 161 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); 173 174 /* inode.c */ 175 176 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, 181 unsigned long ino); 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); 185 186 /* file.c */ 187 188 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); 191 192 /* dir.c */ 193 194 extern void affs_dir_truncate(struct inode *); 195 196 /* jump tables */ 197 198 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; 207 208 extern const struct dentry_operations affs_dentry_operations; 209 extern const struct dentry_operations affs_intl_dentry_operations; 210 211 static inline void 212 affs_set_blocksize(struct super_block *sb, int size) 213 { 214 sb_set_blocksize(sb, size); 215 } 216 static inline struct buffer_head * 217 affs_bread(struct super_block *sb, int block) 218 { 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); 222 return NULL; 223 } 224 static inline struct buffer_head * 225 affs_getblk(struct super_block *sb, int block) 226 { 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); 230 return NULL; 231 } 232 static inline struct buffer_head * 233 affs_getzeroblk(struct super_block *sb, int block) 234 { 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); 239 lock_buffer(bh); 240 memset(bh->b_data, 0 , sb->s_blocksize); 241 set_buffer_uptodate(bh); 242 unlock_buffer(bh); 243 return bh; 244 } 245 return NULL; 246 } 247 static inline struct buffer_head * 248 affs_getemptyblk(struct super_block *sb, int block) 249 { 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); 254 wait_on_buffer(bh); 255 set_buffer_uptodate(bh); 256 return bh; 257 } 258 return NULL; 259 } 260 static inline void 261 affs_brelse(struct buffer_head *bh) 262 { 263 if (bh) 264 pr_debug("%s: %lld\n", __func__, (long long) bh->b_blocknr); 265 brelse(bh); 266 } 267 268 static inline void 269 affs_adjust_checksum(struct buffer_head *bh, u32 val) 270 { 271 u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[5]); 272 ((__be32 *)bh->b_data)[5] = cpu_to_be32(tmp - val); 273 } 274 static inline void 275 affs_adjust_bitmapchecksum(struct buffer_head *bh, u32 val) 276 { 277 u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[0]); 278 ((__be32 *)bh->b_data)[0] = cpu_to_be32(tmp - val); 279 } 280 281 static inline void 282 affs_lock_link(struct inode *inode) 283 { 284 down(&AFFS_I(inode)->i_link_lock); 285 } 286 static inline void 287 affs_unlock_link(struct inode *inode) 288 { 289 up(&AFFS_I(inode)->i_link_lock); 290 } 291 static inline void 292 affs_lock_dir(struct inode *inode) 293 { 294 down(&AFFS_I(inode)->i_hash_lock); 295 } 296 static inline void 297 affs_unlock_dir(struct inode *inode) 298 { 299 up(&AFFS_I(inode)->i_hash_lock); 300 } 301 static inline void 302 affs_lock_ext(struct inode *inode) 303 { 304 down(&AFFS_I(inode)->i_ext_lock); 305 } 306 static inline void 307 affs_unlock_ext(struct inode *inode) 308 { 309 up(&AFFS_I(inode)->i_ext_lock); 310 } 311