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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 | #ifdef pr_fmt #undef pr_fmt #endif #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/types.h> #include <linux/fs.h> #include <linux/buffer_head.h> #include <linux/amigaffs.h> #include <linux/mutex.h> #include <linux/workqueue.h> /* Ugly macros make the code more pretty. */ #define GET_END_PTR(st,p,sz) ((st *)((char *)(p)+((sz)-sizeof(st)))) #define AFFS_GET_HASHENTRY(data,hashkey) be32_to_cpu(((struct dir_front *)data)->hashtable[hashkey]) #define AFFS_BLOCK(sb, bh, blk) (AFFS_HEAD(bh)->table[AFFS_SB(sb)->s_hashsize-1-(blk)]) #define AFFS_HEAD(bh) ((struct affs_head *)(bh)->b_data) #define AFFS_TAIL(sb, bh) ((struct affs_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_tail))) #define AFFS_ROOT_HEAD(bh) ((struct affs_root_head *)(bh)->b_data) #define AFFS_ROOT_TAIL(sb, bh) ((struct affs_root_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_root_tail))) #define AFFS_DATA_HEAD(bh) ((struct affs_data_head *)(bh)->b_data) #define AFFS_DATA(bh) (((struct affs_data_head *)(bh)->b_data)->data) #define AFFS_CACHE_SIZE PAGE_SIZE #define AFFS_LC_SIZE (AFFS_CACHE_SIZE/sizeof(u32)/2) #define AFFS_AC_SIZE (AFFS_CACHE_SIZE/sizeof(struct affs_ext_key)/2) #define AFFS_AC_MASK (AFFS_AC_SIZE-1) #define AFFSNAMEMAX 30U struct affs_ext_key { u32 ext; /* idx of the extended block */ u32 key; /* block number */ }; /* * affs fs inode data in memory */ struct affs_inode_info { atomic_t i_opencnt; struct semaphore i_link_lock; /* Protects internal inode access. */ struct semaphore i_ext_lock; /* Protects internal inode access. */ #define i_hash_lock i_ext_lock u32 i_blkcnt; /* block count */ u32 i_extcnt; /* extended block count */ u32 *i_lc; /* linear cache of extended blocks */ u32 i_lc_size; u32 i_lc_shift; u32 i_lc_mask; struct affs_ext_key *i_ac; /* associative cache of extended blocks */ u32 i_ext_last; /* last accessed extended block */ struct buffer_head *i_ext_bh; /* bh of last extended block */ loff_t mmu_private; u32 i_protect; /* unused attribute bits */ u32 i_lastalloc; /* last allocated block */ int i_pa_cnt; /* number of preallocated blocks */ struct inode vfs_inode; }; /* short cut to get to the affs specific inode data */ static inline struct affs_inode_info *AFFS_I(struct inode *inode) { return container_of(inode, struct affs_inode_info, vfs_inode); } /* * super-block data in memory * * Block numbers are adjusted for their actual size * */ struct affs_bm_info { u32 bm_key; /* Disk block number */ u32 bm_free; /* Free blocks in here */ }; struct affs_sb_info { int s_partition_size; /* Partition size in blocks. */ int s_reserved; /* Number of reserved blocks. */ //u32 s_blksize; /* Initial device blksize */ u32 s_data_blksize; /* size of the data block w/o header */ u32 s_root_block; /* FFS root block number. */ int s_hashsize; /* Size of hash table. */ unsigned long s_flags; /* See below. */ kuid_t s_uid; /* uid to override */ kgid_t s_gid; /* gid to override */ umode_t s_mode; /* mode to override */ struct buffer_head *s_root_bh; /* Cached root block. */ struct mutex s_bmlock; /* Protects bitmap access. */ struct affs_bm_info *s_bitmap; /* Bitmap infos. */ u32 s_bmap_count; /* # of bitmap blocks. */ u32 s_bmap_bits; /* # of bits in one bitmap blocks */ u32 s_last_bmap; struct buffer_head *s_bmap_bh; char *s_prefix; /* Prefix for volumes and assigns. */ char s_volume[32]; /* Volume prefix for absolute symlinks. */ spinlock_t symlink_lock; /* protects the previous two */ struct super_block *sb; /* the VFS superblock object */ int work_queued; /* non-zero delayed work is queued */ struct delayed_work sb_work; /* superblock flush delayed work */ spinlock_t work_lock; /* protects sb_work and work_queued */ }; #define AFFS_MOUNT_SF_INTL 0x0001 /* International filesystem. */ #define AFFS_MOUNT_SF_BM_VALID 0x0002 /* Bitmap is valid. */ #define AFFS_MOUNT_SF_IMMUTABLE 0x0004 /* Protection bits cannot be changed */ #define AFFS_MOUNT_SF_QUIET 0x0008 /* chmod errors will be not reported */ #define AFFS_MOUNT_SF_SETUID 0x0010 /* Ignore Amiga uid */ #define AFFS_MOUNT_SF_SETGID 0x0020 /* Ignore Amiga gid */ #define AFFS_MOUNT_SF_SETMODE 0x0040 /* Ignore Amiga protection bits */ #define AFFS_MOUNT_SF_MUFS 0x0100 /* Use MUFS uid/gid mapping */ #define AFFS_MOUNT_SF_OFS 0x0200 /* Old filesystem */ #define AFFS_MOUNT_SF_PREFIX 0x0400 /* Buffer for prefix is allocated */ #define AFFS_MOUNT_SF_VERBOSE 0x0800 /* Talk about fs when mounting */ #define AFFS_MOUNT_SF_NO_TRUNCATE 0x1000 /* Don't truncate filenames */ #define affs_clear_opt(o, opt) (o &= ~AFFS_MOUNT_##opt) #define affs_set_opt(o, opt) (o |= AFFS_MOUNT_##opt) #define affs_test_opt(o, opt) ((o) & AFFS_MOUNT_##opt) /* short cut to get to the affs specific sb data */ static inline struct affs_sb_info *AFFS_SB(struct super_block *sb) { return sb->s_fs_info; } void affs_mark_sb_dirty(struct super_block *sb); /* amigaffs.c */ extern int affs_insert_hash(struct inode *inode, struct buffer_head *bh); extern int affs_remove_hash(struct inode *dir, struct buffer_head *rem_bh); extern int affs_remove_header(struct dentry *dentry); extern u32 affs_checksum_block(struct super_block *sb, struct buffer_head *bh); extern void affs_fix_checksum(struct super_block *sb, struct buffer_head *bh); extern void secs_to_datestamp(time64_t secs, struct affs_date *ds); extern umode_t prot_to_mode(u32 prot); extern void mode_to_prot(struct inode *inode); __printf(3, 4) extern void affs_error(struct super_block *sb, const char *function, const char *fmt, ...); __printf(3, 4) extern void affs_warning(struct super_block *sb, const char *function, const char *fmt, ...); extern bool affs_nofilenametruncate(const struct dentry *dentry); extern int affs_check_name(const unsigned char *name, int len, bool notruncate); extern int affs_copy_name(unsigned char *bstr, struct dentry *dentry); /* bitmap. c */ extern u32 affs_count_free_blocks(struct super_block *s); extern void affs_free_block(struct super_block *sb, u32 block); extern u32 affs_alloc_block(struct inode *inode, u32 goal); extern int affs_init_bitmap(struct super_block *sb, int *flags); extern void affs_free_bitmap(struct super_block *sb); /* namei.c */ extern int affs_hash_name(struct super_block *sb, const u8 *name, unsigned int len); extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int); extern int affs_unlink(struct inode *dir, struct dentry *dentry); extern int affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool); extern int affs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode); extern int affs_rmdir(struct inode *dir, struct dentry *dentry); extern int affs_link(struct dentry *olddentry, struct inode *dir, struct dentry *dentry); extern int affs_symlink(struct inode *dir, struct dentry *dentry, const char *symname); extern int affs_rename(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry, unsigned int flags); /* inode.c */ extern unsigned long affs_parent_ino(struct inode *dir); extern struct inode *affs_new_inode(struct inode *dir); extern int affs_notify_change(struct dentry *dentry, struct iattr *attr); extern void affs_evict_inode(struct inode *inode); extern struct inode *affs_iget(struct super_block *sb, unsigned long ino); extern int affs_write_inode(struct inode *inode, struct writeback_control *wbc); extern int affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type); /* file.c */ void affs_free_prealloc(struct inode *inode); extern void affs_truncate(struct inode *); int affs_file_fsync(struct file *, loff_t, loff_t, int); /* dir.c */ extern void affs_dir_truncate(struct inode *); /* jump tables */ extern const struct inode_operations affs_file_inode_operations; extern const struct inode_operations affs_dir_inode_operations; extern const struct inode_operations affs_symlink_inode_operations; extern const struct file_operations affs_file_operations; extern const struct file_operations affs_file_operations_ofs; extern const struct file_operations affs_dir_operations; extern const struct address_space_operations affs_symlink_aops; extern const struct address_space_operations affs_aops; extern const struct address_space_operations affs_aops_ofs; extern const struct dentry_operations affs_dentry_operations; extern const struct dentry_operations affs_intl_dentry_operations; static inline void affs_set_blocksize(struct super_block *sb, int size) { sb_set_blocksize(sb, size); } static inline struct buffer_head * affs_bread(struct super_block *sb, int block) { pr_debug("%s: %d\n", __func__, block); if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) return sb_bread(sb, block); return NULL; } static inline struct buffer_head * affs_getblk(struct super_block *sb, int block) { pr_debug("%s: %d\n", __func__, block); if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) return sb_getblk(sb, block); return NULL; } static inline struct buffer_head * affs_getzeroblk(struct super_block *sb, int block) { struct buffer_head *bh; pr_debug("%s: %d\n", __func__, block); if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) { bh = sb_getblk(sb, block); lock_buffer(bh); memset(bh->b_data, 0 , sb->s_blocksize); set_buffer_uptodate(bh); unlock_buffer(bh); return bh; } return NULL; } static inline struct buffer_head * affs_getemptyblk(struct super_block *sb, int block) { struct buffer_head *bh; pr_debug("%s: %d\n", __func__, block); if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) { bh = sb_getblk(sb, block); wait_on_buffer(bh); set_buffer_uptodate(bh); return bh; } return NULL; } static inline void affs_brelse(struct buffer_head *bh) { if (bh) pr_debug("%s: %lld\n", __func__, (long long) bh->b_blocknr); brelse(bh); } static inline void affs_adjust_checksum(struct buffer_head *bh, u32 val) { u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[5]); ((__be32 *)bh->b_data)[5] = cpu_to_be32(tmp - val); } static inline void affs_adjust_bitmapchecksum(struct buffer_head *bh, u32 val) { u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[0]); ((__be32 *)bh->b_data)[0] = cpu_to_be32(tmp - val); } static inline void affs_lock_link(struct inode *inode) { down(&AFFS_I(inode)->i_link_lock); } static inline void affs_unlock_link(struct inode *inode) { up(&AFFS_I(inode)->i_link_lock); } static inline void affs_lock_dir(struct inode *inode) { down(&AFFS_I(inode)->i_hash_lock); } static inline void affs_unlock_dir(struct inode *inode) { up(&AFFS_I(inode)->i_hash_lock); } static inline void affs_lock_ext(struct inode *inode) { down(&AFFS_I(inode)->i_ext_lock); } static inline void affs_unlock_ext(struct inode *inode) { up(&AFFS_I(inode)->i_ext_lock); } |