1 #include <linux/types.h> 2 #include <linux/fs.h> 3 #include <linux/buffer_head.h> 4 #include <linux/amigaffs.h> 5 #include <linux/mutex.h> 6 #include <linux/workqueue.h> 7 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 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 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 { 36 atomic_t i_opencnt; 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. */ 82 kuid_t s_uid; /* uid to override */ 83 kgid_t s_gid; /* gid to override */ 84 umode_t s_mode; /* mode to override */ 85 struct buffer_head *s_root_bh; /* Cached root block. */ 86 struct mutex s_bmlock; /* Protects bitmap access. */ 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. */ 93 char s_volume[32]; /* Volume prefix for absolute symlinks. */ 94 spinlock_t symlink_lock; /* protects the previous two */ 95 struct super_block *sb; /* the VFS superblock object */ 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 */ 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 */ 112 #define SF_NO_TRUNCATE 0x1000 /* Don't truncate filenames */ 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 } 119 120 void affs_mark_sb_dirty(struct super_block *sb); 121 122 /* 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); 130 extern umode_t prot_to_mode(u32 prot); 131 extern void mode_to_prot(struct inode *inode); 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); 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); 152 extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int); 153 extern int affs_unlink(struct inode *dir, struct dentry *dentry); 154 extern int affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool); 155 extern int affs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode); 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); 169 extern void affs_evict_inode(struct inode *inode); 170 extern struct inode *affs_iget(struct super_block *sb, 171 unsigned long ino); 172 extern int affs_write_inode(struct inode *inode, 173 struct writeback_control *wbc); 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 *); 180 int affs_file_fsync(struct file *, loff_t, loff_t, int); 181 182 /* dir.c */ 183 184 extern void affs_dir_truncate(struct inode *); 185 186 /* jump tables */ 187 188 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; 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; 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; 197 198 extern const struct dentry_operations affs_dentry_operations; 199 extern const struct dentry_operations affs_intl_dentry_operations; 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 } 301