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 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 { 42 atomic_t i_opencnt; 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. */ 88 kuid_t s_uid; /* uid to override */ 89 kgid_t s_gid; /* gid to override */ 90 umode_t s_mode; /* mode to override */ 91 struct buffer_head *s_root_bh; /* Cached root block. */ 92 struct mutex s_bmlock; /* Protects bitmap access. */ 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. */ 99 char s_volume[32]; /* Volume prefix for absolute symlinks. */ 100 spinlock_t symlink_lock; /* protects the previous two */ 101 struct super_block *sb; /* the VFS superblock object */ 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 */ 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 */ 118 #define SF_NO_TRUNCATE 0x1000 /* Don't truncate filenames */ 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 } 125 126 void affs_mark_sb_dirty(struct super_block *sb); 127 128 /* 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); 136 extern umode_t prot_to_mode(u32 prot); 137 extern void mode_to_prot(struct inode *inode); 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); 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); 158 extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int); 159 extern int affs_unlink(struct inode *dir, struct dentry *dentry); 160 extern int affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool); 161 extern int affs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode); 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); 175 extern void affs_evict_inode(struct inode *inode); 176 extern struct inode *affs_iget(struct super_block *sb, 177 unsigned long ino); 178 extern int affs_write_inode(struct inode *inode, 179 struct writeback_control *wbc); 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 *); 186 int affs_file_fsync(struct file *, loff_t, loff_t, int); 187 188 /* dir.c */ 189 190 extern void affs_dir_truncate(struct inode *); 191 192 /* jump tables */ 193 194 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; 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; 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; 203 204 extern const struct dentry_operations affs_dentry_operations; 205 extern const struct dentry_operations affs_intl_dentry_operations; 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("%s: %d\n", __func__, 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("%s: %d\n", __func__, 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("%s: %d\n", __func__, 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("%s: %d\n", __func__, 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("%s: %lld\n", __func__, (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 } 307