| 1 | /* |
| 2 | * linux/fs/hfsplus/super.c |
| 3 | * |
| 4 | * Copyright (C) 2001 |
| 5 | * Brad Boyer (flar@allandria.com) |
| 6 | * (C) 2003 Ardis Technologies <roman@ardistech.com> |
| 7 | * |
| 8 | */ |
| 9 | |
| 10 | #include <linux/module.h> |
| 11 | #include <linux/init.h> |
| 12 | #include <linux/pagemap.h> |
| 13 | #include <linux/blkdev.h> |
| 14 | #include <linux/fs.h> |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/vfs.h> |
| 17 | #include <linux/nls.h> |
| 18 | |
| 19 | static struct inode *hfsplus_alloc_inode(struct super_block *sb); |
| 20 | static void hfsplus_destroy_inode(struct inode *inode); |
| 21 | |
| 22 | #include "hfsplus_fs.h" |
| 23 | |
| 24 | static int hfsplus_system_read_inode(struct inode *inode) |
| 25 | { |
| 26 | struct hfsplus_vh *vhdr = HFSPLUS_SB(inode->i_sb)->s_vhdr; |
| 27 | |
| 28 | switch (inode->i_ino) { |
| 29 | case HFSPLUS_EXT_CNID: |
| 30 | hfsplus_inode_read_fork(inode, &vhdr->ext_file); |
| 31 | inode->i_mapping->a_ops = &hfsplus_btree_aops; |
| 32 | break; |
| 33 | case HFSPLUS_CAT_CNID: |
| 34 | hfsplus_inode_read_fork(inode, &vhdr->cat_file); |
| 35 | inode->i_mapping->a_ops = &hfsplus_btree_aops; |
| 36 | break; |
| 37 | case HFSPLUS_ALLOC_CNID: |
| 38 | hfsplus_inode_read_fork(inode, &vhdr->alloc_file); |
| 39 | inode->i_mapping->a_ops = &hfsplus_aops; |
| 40 | break; |
| 41 | case HFSPLUS_START_CNID: |
| 42 | hfsplus_inode_read_fork(inode, &vhdr->start_file); |
| 43 | break; |
| 44 | case HFSPLUS_ATTR_CNID: |
| 45 | hfsplus_inode_read_fork(inode, &vhdr->attr_file); |
| 46 | inode->i_mapping->a_ops = &hfsplus_btree_aops; |
| 47 | break; |
| 48 | default: |
| 49 | return -EIO; |
| 50 | } |
| 51 | |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino) |
| 56 | { |
| 57 | struct hfs_find_data fd; |
| 58 | struct inode *inode; |
| 59 | int err; |
| 60 | |
| 61 | inode = iget_locked(sb, ino); |
| 62 | if (!inode) |
| 63 | return ERR_PTR(-ENOMEM); |
| 64 | if (!(inode->i_state & I_NEW)) |
| 65 | return inode; |
| 66 | |
| 67 | INIT_LIST_HEAD(&HFSPLUS_I(inode)->open_dir_list); |
| 68 | mutex_init(&HFSPLUS_I(inode)->extents_lock); |
| 69 | HFSPLUS_I(inode)->flags = 0; |
| 70 | HFSPLUS_I(inode)->extent_state = 0; |
| 71 | HFSPLUS_I(inode)->rsrc_inode = NULL; |
| 72 | atomic_set(&HFSPLUS_I(inode)->opencnt, 0); |
| 73 | |
| 74 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || |
| 75 | inode->i_ino == HFSPLUS_ROOT_CNID) { |
| 76 | err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd); |
| 77 | if (!err) { |
| 78 | err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); |
| 79 | if (!err) |
| 80 | err = hfsplus_cat_read_inode(inode, &fd); |
| 81 | hfs_find_exit(&fd); |
| 82 | } |
| 83 | } else { |
| 84 | err = hfsplus_system_read_inode(inode); |
| 85 | } |
| 86 | |
| 87 | if (err) { |
| 88 | iget_failed(inode); |
| 89 | return ERR_PTR(err); |
| 90 | } |
| 91 | |
| 92 | unlock_new_inode(inode); |
| 93 | return inode; |
| 94 | } |
| 95 | |
| 96 | static int hfsplus_system_write_inode(struct inode *inode) |
| 97 | { |
| 98 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); |
| 99 | struct hfsplus_vh *vhdr = sbi->s_vhdr; |
| 100 | struct hfsplus_fork_raw *fork; |
| 101 | struct hfs_btree *tree = NULL; |
| 102 | |
| 103 | switch (inode->i_ino) { |
| 104 | case HFSPLUS_EXT_CNID: |
| 105 | fork = &vhdr->ext_file; |
| 106 | tree = sbi->ext_tree; |
| 107 | break; |
| 108 | case HFSPLUS_CAT_CNID: |
| 109 | fork = &vhdr->cat_file; |
| 110 | tree = sbi->cat_tree; |
| 111 | break; |
| 112 | case HFSPLUS_ALLOC_CNID: |
| 113 | fork = &vhdr->alloc_file; |
| 114 | break; |
| 115 | case HFSPLUS_START_CNID: |
| 116 | fork = &vhdr->start_file; |
| 117 | break; |
| 118 | case HFSPLUS_ATTR_CNID: |
| 119 | fork = &vhdr->attr_file; |
| 120 | tree = sbi->attr_tree; |
| 121 | default: |
| 122 | return -EIO; |
| 123 | } |
| 124 | |
| 125 | if (fork->total_size != cpu_to_be64(inode->i_size)) { |
| 126 | set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags); |
| 127 | inode->i_sb->s_dirt = 1; |
| 128 | } |
| 129 | hfsplus_inode_write_fork(inode, fork); |
| 130 | if (tree) |
| 131 | hfs_btree_write(tree); |
| 132 | return 0; |
| 133 | } |
| 134 | |
| 135 | static int hfsplus_write_inode(struct inode *inode, |
| 136 | struct writeback_control *wbc) |
| 137 | { |
| 138 | int err; |
| 139 | |
| 140 | dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino); |
| 141 | |
| 142 | err = hfsplus_ext_write_extent(inode); |
| 143 | if (err) |
| 144 | return err; |
| 145 | |
| 146 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || |
| 147 | inode->i_ino == HFSPLUS_ROOT_CNID) |
| 148 | return hfsplus_cat_write_inode(inode); |
| 149 | else |
| 150 | return hfsplus_system_write_inode(inode); |
| 151 | } |
| 152 | |
| 153 | static void hfsplus_evict_inode(struct inode *inode) |
| 154 | { |
| 155 | dprint(DBG_INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino); |
| 156 | truncate_inode_pages(&inode->i_data, 0); |
| 157 | end_writeback(inode); |
| 158 | if (HFSPLUS_IS_RSRC(inode)) { |
| 159 | HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL; |
| 160 | iput(HFSPLUS_I(inode)->rsrc_inode); |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | int hfsplus_sync_fs(struct super_block *sb, int wait) |
| 165 | { |
| 166 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
| 167 | struct hfsplus_vh *vhdr = sbi->s_vhdr; |
| 168 | int write_backup = 0; |
| 169 | int error, error2; |
| 170 | |
| 171 | if (!wait) |
| 172 | return 0; |
| 173 | |
| 174 | dprint(DBG_SUPER, "hfsplus_write_super\n"); |
| 175 | |
| 176 | sb->s_dirt = 0; |
| 177 | |
| 178 | /* |
| 179 | * Explicitly write out the special metadata inodes. |
| 180 | * |
| 181 | * While these special inodes are marked as hashed and written |
| 182 | * out peridocically by the flusher threads we redirty them |
| 183 | * during writeout of normal inodes, and thus the life lock |
| 184 | * prevents us from getting the latest state to disk. |
| 185 | */ |
| 186 | error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping); |
| 187 | error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping); |
| 188 | if (!error) |
| 189 | error = error2; |
| 190 | error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping); |
| 191 | if (!error) |
| 192 | error = error2; |
| 193 | |
| 194 | mutex_lock(&sbi->vh_mutex); |
| 195 | mutex_lock(&sbi->alloc_mutex); |
| 196 | vhdr->free_blocks = cpu_to_be32(sbi->free_blocks); |
| 197 | vhdr->next_cnid = cpu_to_be32(sbi->next_cnid); |
| 198 | vhdr->folder_count = cpu_to_be32(sbi->folder_count); |
| 199 | vhdr->file_count = cpu_to_be32(sbi->file_count); |
| 200 | |
| 201 | if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) { |
| 202 | memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr)); |
| 203 | write_backup = 1; |
| 204 | } |
| 205 | |
| 206 | error2 = hfsplus_submit_bio(sb, |
| 207 | sbi->part_start + HFSPLUS_VOLHEAD_SECTOR, |
| 208 | sbi->s_vhdr_buf, NULL, WRITE_SYNC); |
| 209 | if (!error) |
| 210 | error = error2; |
| 211 | if (!write_backup) |
| 212 | goto out; |
| 213 | |
| 214 | error2 = hfsplus_submit_bio(sb, |
| 215 | sbi->part_start + sbi->sect_count - 2, |
| 216 | sbi->s_backup_vhdr_buf, NULL, WRITE_SYNC); |
| 217 | if (!error) |
| 218 | error2 = error; |
| 219 | out: |
| 220 | mutex_unlock(&sbi->alloc_mutex); |
| 221 | mutex_unlock(&sbi->vh_mutex); |
| 222 | |
| 223 | if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags)) |
| 224 | blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); |
| 225 | |
| 226 | return error; |
| 227 | } |
| 228 | |
| 229 | static void hfsplus_write_super(struct super_block *sb) |
| 230 | { |
| 231 | if (!(sb->s_flags & MS_RDONLY)) |
| 232 | hfsplus_sync_fs(sb, 1); |
| 233 | else |
| 234 | sb->s_dirt = 0; |
| 235 | } |
| 236 | |
| 237 | static void hfsplus_put_super(struct super_block *sb) |
| 238 | { |
| 239 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
| 240 | |
| 241 | dprint(DBG_SUPER, "hfsplus_put_super\n"); |
| 242 | |
| 243 | if (!sb->s_fs_info) |
| 244 | return; |
| 245 | |
| 246 | if (!(sb->s_flags & MS_RDONLY) && sbi->s_vhdr) { |
| 247 | struct hfsplus_vh *vhdr = sbi->s_vhdr; |
| 248 | |
| 249 | vhdr->modify_date = hfsp_now2mt(); |
| 250 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); |
| 251 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); |
| 252 | |
| 253 | hfsplus_sync_fs(sb, 1); |
| 254 | } |
| 255 | |
| 256 | hfs_btree_close(sbi->cat_tree); |
| 257 | hfs_btree_close(sbi->ext_tree); |
| 258 | iput(sbi->alloc_file); |
| 259 | iput(sbi->hidden_dir); |
| 260 | kfree(sbi->s_vhdr_buf); |
| 261 | kfree(sbi->s_backup_vhdr_buf); |
| 262 | unload_nls(sbi->nls); |
| 263 | kfree(sb->s_fs_info); |
| 264 | sb->s_fs_info = NULL; |
| 265 | } |
| 266 | |
| 267 | static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf) |
| 268 | { |
| 269 | struct super_block *sb = dentry->d_sb; |
| 270 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
| 271 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
| 272 | |
| 273 | buf->f_type = HFSPLUS_SUPER_MAGIC; |
| 274 | buf->f_bsize = sb->s_blocksize; |
| 275 | buf->f_blocks = sbi->total_blocks << sbi->fs_shift; |
| 276 | buf->f_bfree = sbi->free_blocks << sbi->fs_shift; |
| 277 | buf->f_bavail = buf->f_bfree; |
| 278 | buf->f_files = 0xFFFFFFFF; |
| 279 | buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid; |
| 280 | buf->f_fsid.val[0] = (u32)id; |
| 281 | buf->f_fsid.val[1] = (u32)(id >> 32); |
| 282 | buf->f_namelen = HFSPLUS_MAX_STRLEN; |
| 283 | |
| 284 | return 0; |
| 285 | } |
| 286 | |
| 287 | static int hfsplus_remount(struct super_block *sb, int *flags, char *data) |
| 288 | { |
| 289 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) |
| 290 | return 0; |
| 291 | if (!(*flags & MS_RDONLY)) { |
| 292 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr; |
| 293 | int force = 0; |
| 294 | |
| 295 | if (!hfsplus_parse_options_remount(data, &force)) |
| 296 | return -EINVAL; |
| 297 | |
| 298 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { |
| 299 | printk(KERN_WARNING "hfs: filesystem was " |
| 300 | "not cleanly unmounted, " |
| 301 | "running fsck.hfsplus is recommended. " |
| 302 | "leaving read-only.\n"); |
| 303 | sb->s_flags |= MS_RDONLY; |
| 304 | *flags |= MS_RDONLY; |
| 305 | } else if (force) { |
| 306 | /* nothing */ |
| 307 | } else if (vhdr->attributes & |
| 308 | cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
| 309 | printk(KERN_WARNING "hfs: filesystem is marked locked, " |
| 310 | "leaving read-only.\n"); |
| 311 | sb->s_flags |= MS_RDONLY; |
| 312 | *flags |= MS_RDONLY; |
| 313 | } else if (vhdr->attributes & |
| 314 | cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { |
| 315 | printk(KERN_WARNING "hfs: filesystem is " |
| 316 | "marked journaled, " |
| 317 | "leaving read-only.\n"); |
| 318 | sb->s_flags |= MS_RDONLY; |
| 319 | *flags |= MS_RDONLY; |
| 320 | } |
| 321 | } |
| 322 | return 0; |
| 323 | } |
| 324 | |
| 325 | static const struct super_operations hfsplus_sops = { |
| 326 | .alloc_inode = hfsplus_alloc_inode, |
| 327 | .destroy_inode = hfsplus_destroy_inode, |
| 328 | .write_inode = hfsplus_write_inode, |
| 329 | .evict_inode = hfsplus_evict_inode, |
| 330 | .put_super = hfsplus_put_super, |
| 331 | .write_super = hfsplus_write_super, |
| 332 | .sync_fs = hfsplus_sync_fs, |
| 333 | .statfs = hfsplus_statfs, |
| 334 | .remount_fs = hfsplus_remount, |
| 335 | .show_options = hfsplus_show_options, |
| 336 | }; |
| 337 | |
| 338 | static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) |
| 339 | { |
| 340 | struct hfsplus_vh *vhdr; |
| 341 | struct hfsplus_sb_info *sbi; |
| 342 | hfsplus_cat_entry entry; |
| 343 | struct hfs_find_data fd; |
| 344 | struct inode *root, *inode; |
| 345 | struct qstr str; |
| 346 | struct nls_table *nls = NULL; |
| 347 | u64 last_fs_block, last_fs_page; |
| 348 | int err; |
| 349 | |
| 350 | err = -EINVAL; |
| 351 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
| 352 | if (!sbi) |
| 353 | goto out; |
| 354 | |
| 355 | sb->s_fs_info = sbi; |
| 356 | mutex_init(&sbi->alloc_mutex); |
| 357 | mutex_init(&sbi->vh_mutex); |
| 358 | hfsplus_fill_defaults(sbi); |
| 359 | |
| 360 | err = -EINVAL; |
| 361 | if (!hfsplus_parse_options(data, sbi)) { |
| 362 | printk(KERN_ERR "hfs: unable to parse mount options\n"); |
| 363 | goto out_unload_nls; |
| 364 | } |
| 365 | |
| 366 | /* temporarily use utf8 to correctly find the hidden dir below */ |
| 367 | nls = sbi->nls; |
| 368 | sbi->nls = load_nls("utf8"); |
| 369 | if (!sbi->nls) { |
| 370 | printk(KERN_ERR "hfs: unable to load nls for utf8\n"); |
| 371 | goto out_unload_nls; |
| 372 | } |
| 373 | |
| 374 | /* Grab the volume header */ |
| 375 | if (hfsplus_read_wrapper(sb)) { |
| 376 | if (!silent) |
| 377 | printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n"); |
| 378 | goto out_unload_nls; |
| 379 | } |
| 380 | vhdr = sbi->s_vhdr; |
| 381 | |
| 382 | /* Copy parts of the volume header into the superblock */ |
| 383 | sb->s_magic = HFSPLUS_VOLHEAD_SIG; |
| 384 | if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION || |
| 385 | be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) { |
| 386 | printk(KERN_ERR "hfs: wrong filesystem version\n"); |
| 387 | goto out_free_vhdr; |
| 388 | } |
| 389 | sbi->total_blocks = be32_to_cpu(vhdr->total_blocks); |
| 390 | sbi->free_blocks = be32_to_cpu(vhdr->free_blocks); |
| 391 | sbi->next_cnid = be32_to_cpu(vhdr->next_cnid); |
| 392 | sbi->file_count = be32_to_cpu(vhdr->file_count); |
| 393 | sbi->folder_count = be32_to_cpu(vhdr->folder_count); |
| 394 | sbi->data_clump_blocks = |
| 395 | be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift; |
| 396 | if (!sbi->data_clump_blocks) |
| 397 | sbi->data_clump_blocks = 1; |
| 398 | sbi->rsrc_clump_blocks = |
| 399 | be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift; |
| 400 | if (!sbi->rsrc_clump_blocks) |
| 401 | sbi->rsrc_clump_blocks = 1; |
| 402 | |
| 403 | err = -EFBIG; |
| 404 | last_fs_block = sbi->total_blocks - 1; |
| 405 | last_fs_page = (last_fs_block << sbi->alloc_blksz_shift) >> |
| 406 | PAGE_CACHE_SHIFT; |
| 407 | |
| 408 | if ((last_fs_block > (sector_t)(~0ULL) >> (sbi->alloc_blksz_shift - 9)) || |
| 409 | (last_fs_page > (pgoff_t)(~0ULL))) { |
| 410 | printk(KERN_ERR "hfs: filesystem size too large.\n"); |
| 411 | goto out_free_vhdr; |
| 412 | } |
| 413 | |
| 414 | /* Set up operations so we can load metadata */ |
| 415 | sb->s_op = &hfsplus_sops; |
| 416 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
| 417 | |
| 418 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { |
| 419 | printk(KERN_WARNING "hfs: Filesystem was " |
| 420 | "not cleanly unmounted, " |
| 421 | "running fsck.hfsplus is recommended. " |
| 422 | "mounting read-only.\n"); |
| 423 | sb->s_flags |= MS_RDONLY; |
| 424 | } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) { |
| 425 | /* nothing */ |
| 426 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
| 427 | printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n"); |
| 428 | sb->s_flags |= MS_RDONLY; |
| 429 | } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && |
| 430 | !(sb->s_flags & MS_RDONLY)) { |
| 431 | printk(KERN_WARNING "hfs: write access to " |
| 432 | "a journaled filesystem is not supported, " |
| 433 | "use the force option at your own risk, " |
| 434 | "mounting read-only.\n"); |
| 435 | sb->s_flags |= MS_RDONLY; |
| 436 | } |
| 437 | |
| 438 | err = -EINVAL; |
| 439 | |
| 440 | /* Load metadata objects (B*Trees) */ |
| 441 | sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID); |
| 442 | if (!sbi->ext_tree) { |
| 443 | printk(KERN_ERR "hfs: failed to load extents file\n"); |
| 444 | goto out_free_vhdr; |
| 445 | } |
| 446 | sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID); |
| 447 | if (!sbi->cat_tree) { |
| 448 | printk(KERN_ERR "hfs: failed to load catalog file\n"); |
| 449 | goto out_close_ext_tree; |
| 450 | } |
| 451 | |
| 452 | inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID); |
| 453 | if (IS_ERR(inode)) { |
| 454 | printk(KERN_ERR "hfs: failed to load allocation file\n"); |
| 455 | err = PTR_ERR(inode); |
| 456 | goto out_close_cat_tree; |
| 457 | } |
| 458 | sbi->alloc_file = inode; |
| 459 | |
| 460 | /* Load the root directory */ |
| 461 | root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID); |
| 462 | if (IS_ERR(root)) { |
| 463 | printk(KERN_ERR "hfs: failed to load root directory\n"); |
| 464 | err = PTR_ERR(root); |
| 465 | goto out_put_alloc_file; |
| 466 | } |
| 467 | |
| 468 | str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; |
| 469 | str.name = HFSP_HIDDENDIR_NAME; |
| 470 | err = hfs_find_init(sbi->cat_tree, &fd); |
| 471 | if (err) |
| 472 | goto out_put_root; |
| 473 | hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); |
| 474 | if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { |
| 475 | hfs_find_exit(&fd); |
| 476 | if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) |
| 477 | goto out_put_root; |
| 478 | inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id)); |
| 479 | if (IS_ERR(inode)) { |
| 480 | err = PTR_ERR(inode); |
| 481 | goto out_put_root; |
| 482 | } |
| 483 | sbi->hidden_dir = inode; |
| 484 | } else |
| 485 | hfs_find_exit(&fd); |
| 486 | |
| 487 | if (!(sb->s_flags & MS_RDONLY)) { |
| 488 | /* |
| 489 | * H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused |
| 490 | * all three are registered with Apple for our use |
| 491 | */ |
| 492 | vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION); |
| 493 | vhdr->modify_date = hfsp_now2mt(); |
| 494 | be32_add_cpu(&vhdr->write_count, 1); |
| 495 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); |
| 496 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); |
| 497 | hfsplus_sync_fs(sb, 1); |
| 498 | |
| 499 | if (!sbi->hidden_dir) { |
| 500 | mutex_lock(&sbi->vh_mutex); |
| 501 | sbi->hidden_dir = hfsplus_new_inode(sb, S_IFDIR); |
| 502 | hfsplus_create_cat(sbi->hidden_dir->i_ino, root, &str, |
| 503 | sbi->hidden_dir); |
| 504 | mutex_unlock(&sbi->vh_mutex); |
| 505 | |
| 506 | hfsplus_mark_inode_dirty(sbi->hidden_dir, |
| 507 | HFSPLUS_I_CAT_DIRTY); |
| 508 | } |
| 509 | } |
| 510 | |
| 511 | sb->s_d_op = &hfsplus_dentry_operations; |
| 512 | sb->s_root = d_alloc_root(root); |
| 513 | if (!sb->s_root) { |
| 514 | err = -ENOMEM; |
| 515 | goto out_put_hidden_dir; |
| 516 | } |
| 517 | |
| 518 | unload_nls(sbi->nls); |
| 519 | sbi->nls = nls; |
| 520 | return 0; |
| 521 | |
| 522 | out_put_hidden_dir: |
| 523 | iput(sbi->hidden_dir); |
| 524 | out_put_root: |
| 525 | iput(root); |
| 526 | out_put_alloc_file: |
| 527 | iput(sbi->alloc_file); |
| 528 | out_close_cat_tree: |
| 529 | hfs_btree_close(sbi->cat_tree); |
| 530 | out_close_ext_tree: |
| 531 | hfs_btree_close(sbi->ext_tree); |
| 532 | out_free_vhdr: |
| 533 | kfree(sbi->s_vhdr_buf); |
| 534 | kfree(sbi->s_backup_vhdr_buf); |
| 535 | out_unload_nls: |
| 536 | unload_nls(sbi->nls); |
| 537 | unload_nls(nls); |
| 538 | kfree(sbi); |
| 539 | out: |
| 540 | return err; |
| 541 | } |
| 542 | |
| 543 | MODULE_AUTHOR("Brad Boyer"); |
| 544 | MODULE_DESCRIPTION("Extended Macintosh Filesystem"); |
| 545 | MODULE_LICENSE("GPL"); |
| 546 | |
| 547 | static struct kmem_cache *hfsplus_inode_cachep; |
| 548 | |
| 549 | static struct inode *hfsplus_alloc_inode(struct super_block *sb) |
| 550 | { |
| 551 | struct hfsplus_inode_info *i; |
| 552 | |
| 553 | i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL); |
| 554 | return i ? &i->vfs_inode : NULL; |
| 555 | } |
| 556 | |
| 557 | static void hfsplus_i_callback(struct rcu_head *head) |
| 558 | { |
| 559 | struct inode *inode = container_of(head, struct inode, i_rcu); |
| 560 | |
| 561 | kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode)); |
| 562 | } |
| 563 | |
| 564 | static void hfsplus_destroy_inode(struct inode *inode) |
| 565 | { |
| 566 | call_rcu(&inode->i_rcu, hfsplus_i_callback); |
| 567 | } |
| 568 | |
| 569 | #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) |
| 570 | |
| 571 | static struct dentry *hfsplus_mount(struct file_system_type *fs_type, |
| 572 | int flags, const char *dev_name, void *data) |
| 573 | { |
| 574 | return mount_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super); |
| 575 | } |
| 576 | |
| 577 | static struct file_system_type hfsplus_fs_type = { |
| 578 | .owner = THIS_MODULE, |
| 579 | .name = "hfsplus", |
| 580 | .mount = hfsplus_mount, |
| 581 | .kill_sb = kill_block_super, |
| 582 | .fs_flags = FS_REQUIRES_DEV, |
| 583 | }; |
| 584 | |
| 585 | static void hfsplus_init_once(void *p) |
| 586 | { |
| 587 | struct hfsplus_inode_info *i = p; |
| 588 | |
| 589 | inode_init_once(&i->vfs_inode); |
| 590 | } |
| 591 | |
| 592 | static int __init init_hfsplus_fs(void) |
| 593 | { |
| 594 | int err; |
| 595 | |
| 596 | hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache", |
| 597 | HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN, |
| 598 | hfsplus_init_once); |
| 599 | if (!hfsplus_inode_cachep) |
| 600 | return -ENOMEM; |
| 601 | err = register_filesystem(&hfsplus_fs_type); |
| 602 | if (err) |
| 603 | kmem_cache_destroy(hfsplus_inode_cachep); |
| 604 | return err; |
| 605 | } |
| 606 | |
| 607 | static void __exit exit_hfsplus_fs(void) |
| 608 | { |
| 609 | unregister_filesystem(&hfsplus_fs_type); |
| 610 | kmem_cache_destroy(hfsplus_inode_cachep); |
| 611 | } |
| 612 | |
| 613 | module_init(init_hfsplus_fs) |
| 614 | module_exit(exit_hfsplus_fs) |