2 * linux/fs/hfsplus/inode.c
5 * Brad Boyer (flar@allandria.com)
6 * (C) 2003 Ardis Technologies <roman@ardistech.com>
8 * Inode handling routines
13 #include <linux/pagemap.h>
14 #include <linux/version.h>
15 #include <linux/mpage.h>
17 #include "hfsplus_fs.h"
18 #include "hfsplus_raw.h"
20 static int hfsplus_readpage(struct file *file, struct page *page)
22 //printk("readpage: %lu\n", page->index);
23 return block_read_full_page(page, hfsplus_get_block);
26 static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
28 //printk("writepage: %lu\n", page->index);
29 return block_write_full_page(page, hfsplus_get_block, wbc);
32 static int hfsplus_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
34 return cont_prepare_write(page, from, to, hfsplus_get_block,
35 &HFSPLUS_I(page->mapping->host).phys_size);
38 static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
40 return generic_block_bmap(mapping, block, hfsplus_get_block);
43 int hfsplus_releasepage(struct page *page, int mask)
45 struct inode *inode = page->mapping->host;
46 struct super_block *sb = inode->i_sb;
47 struct hfs_btree *tree;
48 struct hfs_bnode *node;
52 switch (inode->i_ino) {
53 case HFSPLUS_EXT_CNID:
54 tree = HFSPLUS_SB(sb).ext_tree;
56 case HFSPLUS_CAT_CNID:
57 tree = HFSPLUS_SB(sb).cat_tree;
59 case HFSPLUS_ATTR_CNID:
60 tree = HFSPLUS_SB(sb).attr_tree;
66 if (tree->node_size >= PAGE_CACHE_SIZE) {
67 nidx = page->index >> (tree->node_size_shift - PAGE_CACHE_SHIFT);
68 spin_lock(&tree->hash_lock);
69 node = hfs_bnode_findhash(tree, nidx);
72 else if (atomic_read(&node->refcnt))
74 else for (i = 0; i < tree->pages_per_bnode; i++) {
75 if (PageActive(node->page[i])) {
81 hfs_bnode_unhash(node);
84 spin_unlock(&tree->hash_lock);
86 nidx = page->index << (PAGE_CACHE_SHIFT - tree->node_size_shift);
87 i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
88 spin_lock(&tree->hash_lock);
90 node = hfs_bnode_findhash(tree, nidx++);
93 if (atomic_read(&node->refcnt)) {
97 hfs_bnode_unhash(node);
99 } while (--i && nidx < tree->node_count);
100 spin_unlock(&tree->hash_lock);
102 //printk("releasepage: %lu,%x = %d\n", page->index, mask, res);
106 static int hfsplus_get_blocks(struct inode *inode, sector_t iblock, unsigned long max_blocks,
107 struct buffer_head *bh_result, int create)
111 ret = hfsplus_get_block(inode, iblock, bh_result, create);
113 bh_result->b_size = (1 << inode->i_blkbits);
117 static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
118 const struct iovec *iov, loff_t offset, unsigned long nr_segs)
120 struct file *file = iocb->ki_filp;
121 struct inode *inode = file->f_dentry->d_inode->i_mapping->host;
123 return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
124 offset, nr_segs, hfsplus_get_blocks, NULL);
127 static int hfsplus_writepages(struct address_space *mapping,
128 struct writeback_control *wbc)
130 return mpage_writepages(mapping, wbc, hfsplus_get_block);
133 struct address_space_operations hfsplus_btree_aops = {
134 .readpage = hfsplus_readpage,
135 .writepage = hfsplus_writepage,
136 .sync_page = block_sync_page,
137 .prepare_write = hfsplus_prepare_write,
138 .commit_write = generic_commit_write,
139 .bmap = hfsplus_bmap,
140 .releasepage = hfsplus_releasepage,
143 struct address_space_operations hfsplus_aops = {
144 .readpage = hfsplus_readpage,
145 .writepage = hfsplus_writepage,
146 .sync_page = block_sync_page,
147 .prepare_write = hfsplus_prepare_write,
148 .commit_write = generic_commit_write,
149 .bmap = hfsplus_bmap,
150 .direct_IO = hfsplus_direct_IO,
151 .writepages = hfsplus_writepages,
154 static struct dentry *hfsplus_file_lookup(struct inode *dir, struct dentry *dentry,
155 struct nameidata *nd)
157 struct hfs_find_data fd;
158 struct super_block *sb = dir->i_sb;
159 struct inode *inode = NULL;
162 if (HFSPLUS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
165 inode = HFSPLUS_I(dir).rsrc_inode;
169 inode = new_inode(sb);
171 return ERR_PTR(-ENOMEM);
173 inode->i_ino = dir->i_ino;
174 INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
175 init_MUTEX(&HFSPLUS_I(inode).extents_lock);
176 HFSPLUS_I(inode).flags = HFSPLUS_FLG_RSRC;
178 hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
179 err = hfsplus_find_cat(sb, dir->i_ino, &fd);
181 err = hfsplus_cat_read_inode(inode, &fd);
187 HFSPLUS_I(inode).rsrc_inode = dir;
188 HFSPLUS_I(dir).rsrc_inode = inode;
190 hlist_add_head(&inode->i_hash, &HFSPLUS_SB(sb).rsrc_inodes);
191 mark_inode_dirty(inode);
193 void hfsplus_inode_check(struct super_block *sb);
194 atomic_inc(&HFSPLUS_SB(sb).inode_cnt);
195 hfsplus_inode_check(sb);
198 d_add(dentry, inode);
202 static void hfsplus_get_perms(struct inode *inode, struct hfsplus_perm *perms, int dir)
204 struct super_block *sb = inode->i_sb;
207 mode = be16_to_cpu(perms->mode);
209 inode->i_uid = be32_to_cpu(perms->owner);
210 if (!inode->i_uid && !mode)
211 inode->i_uid = HFSPLUS_SB(sb).uid;
213 inode->i_gid = be32_to_cpu(perms->group);
214 if (!inode->i_gid && !mode)
215 inode->i_gid = HFSPLUS_SB(sb).gid;
218 mode = mode ? (mode & S_IALLUGO) :
219 (S_IRWXUGO & ~(HFSPLUS_SB(sb).umask));
222 mode = S_IFREG | ((S_IRUGO|S_IWUGO) &
223 ~(HFSPLUS_SB(sb).umask));
224 inode->i_mode = mode;
226 HFSPLUS_I(inode).rootflags = perms->rootflags;
227 HFSPLUS_I(inode).userflags = perms->userflags;
228 if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
229 inode->i_flags |= S_IMMUTABLE;
231 inode->i_flags &= ~S_IMMUTABLE;
232 if (perms->rootflags & HFSPLUS_FLG_APPEND)
233 inode->i_flags |= S_APPEND;
235 inode->i_flags &= ~S_APPEND;
238 static void hfsplus_set_perms(struct inode *inode, struct hfsplus_perm *perms)
240 if (inode->i_flags & S_IMMUTABLE)
241 perms->rootflags |= HFSPLUS_FLG_IMMUTABLE;
243 perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE;
244 if (inode->i_flags & S_APPEND)
245 perms->rootflags |= HFSPLUS_FLG_APPEND;
247 perms->rootflags &= ~HFSPLUS_FLG_APPEND;
248 perms->userflags = HFSPLUS_I(inode).userflags;
249 perms->mode = cpu_to_be16(inode->i_mode);
250 perms->owner = cpu_to_be32(inode->i_uid);
251 perms->group = cpu_to_be32(inode->i_gid);
252 perms->dev = cpu_to_be32(HFSPLUS_I(inode).dev);
255 static int hfsplus_permission(struct inode *inode, int mask, struct nameidata *nd)
257 /* MAY_EXEC is also used for lookup, if no x bit is set allow lookup,
258 * open_exec has the same test, so it's still not executable, if a x bit
259 * is set fall back to standard permission check.
261 if (S_ISREG(inode->i_mode) && mask & MAY_EXEC && !(inode->i_mode & 0111))
263 return generic_permission(inode, mask, NULL);
267 static int hfsplus_file_open(struct inode *inode, struct file *file)
269 if (HFSPLUS_IS_RSRC(inode))
270 inode = HFSPLUS_I(inode).rsrc_inode;
271 if (atomic_read(&file->f_count) != 1)
273 atomic_inc(&HFSPLUS_I(inode).opencnt);
277 static int hfsplus_file_release(struct inode *inode, struct file *file)
279 struct super_block *sb = inode->i_sb;
281 if (HFSPLUS_IS_RSRC(inode))
282 inode = HFSPLUS_I(inode).rsrc_inode;
283 if (atomic_read(&file->f_count) != 0)
285 if (atomic_dec_and_test(&HFSPLUS_I(inode).opencnt)) {
287 hfsplus_file_truncate(inode);
288 if (inode->i_flags & S_DEAD) {
289 hfsplus_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL);
290 hfsplus_delete_inode(inode);
297 extern struct inode_operations hfsplus_dir_inode_operations;
298 extern struct file_operations hfsplus_dir_operations;
300 struct inode_operations hfsplus_file_inode_operations = {
301 .lookup = hfsplus_file_lookup,
302 .truncate = hfsplus_file_truncate,
303 .permission = hfsplus_permission,
304 .setxattr = hfsplus_setxattr,
305 .getxattr = hfsplus_getxattr,
306 .listxattr = hfsplus_listxattr,
309 struct file_operations hfsplus_file_operations = {
310 .llseek = generic_file_llseek,
311 .read = generic_file_read,
312 .write = generic_file_write,
313 .mmap = generic_file_mmap,
314 .sendfile = generic_file_sendfile,
316 .open = hfsplus_file_open,
317 .release = hfsplus_file_release,
318 .ioctl = hfsplus_ioctl,
321 struct inode *hfsplus_new_inode(struct super_block *sb, int mode)
323 struct inode *inode = new_inode(sb);
328 void hfsplus_inode_check(struct super_block *sb);
329 atomic_inc(&HFSPLUS_SB(sb).inode_cnt);
330 hfsplus_inode_check(sb);
332 inode->i_ino = HFSPLUS_SB(sb).next_cnid++;
333 inode->i_mode = mode;
334 inode->i_uid = current->fsuid;
335 inode->i_gid = current->fsgid;
337 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
338 inode->i_blksize = HFSPLUS_SB(sb).alloc_blksz;
339 INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
340 init_MUTEX(&HFSPLUS_I(inode).extents_lock);
341 atomic_set(&HFSPLUS_I(inode).opencnt, 0);
342 HFSPLUS_I(inode).flags = 0;
343 memset(HFSPLUS_I(inode).first_extents, 0, sizeof(hfsplus_extent_rec));
344 memset(HFSPLUS_I(inode).cached_extents, 0, sizeof(hfsplus_extent_rec));
345 HFSPLUS_I(inode).alloc_blocks = 0;
346 HFSPLUS_I(inode).first_blocks = 0;
347 HFSPLUS_I(inode).cached_start = 0;
348 HFSPLUS_I(inode).cached_blocks = 0;
349 HFSPLUS_I(inode).phys_size = 0;
350 HFSPLUS_I(inode).fs_blocks = 0;
351 HFSPLUS_I(inode).rsrc_inode = NULL;
352 if (S_ISDIR(inode->i_mode)) {
354 HFSPLUS_SB(sb).folder_count++;
355 inode->i_op = &hfsplus_dir_inode_operations;
356 inode->i_fop = &hfsplus_dir_operations;
357 } else if (S_ISREG(inode->i_mode)) {
358 HFSPLUS_SB(sb).file_count++;
359 inode->i_op = &hfsplus_file_inode_operations;
360 inode->i_fop = &hfsplus_file_operations;
361 inode->i_mapping->a_ops = &hfsplus_aops;
362 HFSPLUS_I(inode).clump_blocks = HFSPLUS_SB(sb).data_clump_blocks;
363 } else if (S_ISLNK(inode->i_mode)) {
364 HFSPLUS_SB(sb).file_count++;
365 inode->i_op = &page_symlink_inode_operations;
366 inode->i_mapping->a_ops = &hfsplus_aops;
367 HFSPLUS_I(inode).clump_blocks = 1;
369 HFSPLUS_SB(sb).file_count++;
370 insert_inode_hash(inode);
371 mark_inode_dirty(inode);
377 void hfsplus_delete_inode(struct inode *inode)
379 struct super_block *sb = inode->i_sb;
381 if (S_ISDIR(inode->i_mode)) {
382 HFSPLUS_SB(sb).folder_count--;
386 HFSPLUS_SB(sb).file_count--;
387 if (S_ISREG(inode->i_mode)) {
388 if (!inode->i_nlink) {
390 hfsplus_file_truncate(inode);
392 } else if (S_ISLNK(inode->i_mode)) {
394 hfsplus_file_truncate(inode);
399 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
401 struct super_block *sb = inode->i_sb;
405 memcpy(&HFSPLUS_I(inode).first_extents, &fork->extents,
406 sizeof(hfsplus_extent_rec));
407 for (count = 0, i = 0; i < 8; i++)
408 count += be32_to_cpu(fork->extents[i].block_count);
409 HFSPLUS_I(inode).first_blocks = count;
410 memset(HFSPLUS_I(inode).cached_extents, 0, sizeof(hfsplus_extent_rec));
411 HFSPLUS_I(inode).cached_start = 0;
412 HFSPLUS_I(inode).cached_blocks = 0;
414 HFSPLUS_I(inode).alloc_blocks = be32_to_cpu(fork->total_blocks);
415 inode->i_size = HFSPLUS_I(inode).phys_size = be64_to_cpu(fork->total_size);
416 HFSPLUS_I(inode).fs_blocks = (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
417 inode_set_bytes(inode, HFSPLUS_I(inode).fs_blocks << sb->s_blocksize_bits);
418 HFSPLUS_I(inode).clump_blocks = be32_to_cpu(fork->clump_size) >> HFSPLUS_SB(sb).alloc_blksz_shift;
419 if (!HFSPLUS_I(inode).clump_blocks)
420 HFSPLUS_I(inode).clump_blocks = HFSPLUS_IS_RSRC(inode) ? HFSPLUS_SB(sb).rsrc_clump_blocks :
421 HFSPLUS_SB(sb).data_clump_blocks;
424 void hfsplus_inode_write_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
426 memcpy(&fork->extents, &HFSPLUS_I(inode).first_extents,
427 sizeof(hfsplus_extent_rec));
428 fork->total_size = cpu_to_be64(inode->i_size);
429 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode).alloc_blocks);
432 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
434 hfsplus_cat_entry entry;
438 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
440 HFSPLUS_I(inode).dev = 0;
441 inode->i_blksize = HFSPLUS_SB(inode->i_sb).alloc_blksz;
442 if (type == HFSPLUS_FOLDER) {
443 struct hfsplus_cat_folder *folder = &entry.folder;
445 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
447 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
448 sizeof(struct hfsplus_cat_folder));
449 hfsplus_get_perms(inode, &folder->permissions, 1);
451 inode->i_size = 2 + be32_to_cpu(folder->valence);
452 inode->i_atime = hfsp_mt2ut(folder->access_date);
453 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
454 inode->i_ctime = inode->i_mtime;
455 HFSPLUS_I(inode).fs_blocks = 0;
456 inode->i_op = &hfsplus_dir_inode_operations;
457 inode->i_fop = &hfsplus_dir_operations;
458 } else if (type == HFSPLUS_FILE) {
459 struct hfsplus_cat_file *file = &entry.file;
461 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
463 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
464 sizeof(struct hfsplus_cat_file));
466 hfsplus_inode_read_fork(inode, HFSPLUS_IS_DATA(inode) ?
467 &file->data_fork : &file->rsrc_fork);
468 hfsplus_get_perms(inode, &file->permissions, 0);
470 if (S_ISREG(inode->i_mode)) {
471 if (file->permissions.dev)
472 inode->i_nlink = be32_to_cpu(file->permissions.dev);
473 inode->i_op = &hfsplus_file_inode_operations;
474 inode->i_fop = &hfsplus_file_operations;
475 inode->i_mapping->a_ops = &hfsplus_aops;
476 } else if (S_ISLNK(inode->i_mode)) {
477 inode->i_op = &page_symlink_inode_operations;
478 inode->i_mapping->a_ops = &hfsplus_aops;
480 init_special_inode(inode, inode->i_mode,
481 be32_to_cpu(file->permissions.dev));
483 inode->i_atime = hfsp_mt2ut(file->access_date);
484 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
485 inode->i_ctime = inode->i_mtime;
487 printk("HFS+-fs: bad catalog entry used to create inode\n");
493 int hfsplus_cat_write_inode(struct inode *inode)
495 struct inode *main_inode = inode;
496 struct hfs_find_data fd;
497 hfsplus_cat_entry entry;
499 if (HFSPLUS_IS_RSRC(inode))
500 main_inode = HFSPLUS_I(inode).rsrc_inode;
502 if (!main_inode->i_nlink)
505 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb).cat_tree, &fd))
509 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
513 if (S_ISDIR(main_inode->i_mode)) {
514 struct hfsplus_cat_folder *folder = &entry.folder;
516 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
518 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
519 sizeof(struct hfsplus_cat_folder));
520 /* simple node checks? */
521 hfsplus_set_perms(inode, &folder->permissions);
522 folder->access_date = hfsp_ut2mt(inode->i_atime);
523 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
524 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
525 folder->valence = cpu_to_be32(inode->i_size - 2);
526 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
527 sizeof(struct hfsplus_cat_folder));
528 } else if (HFSPLUS_IS_RSRC(inode)) {
529 struct hfsplus_cat_file *file = &entry.file;
530 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
531 sizeof(struct hfsplus_cat_file));
532 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
533 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
534 sizeof(struct hfsplus_cat_file));
536 struct hfsplus_cat_file *file = &entry.file;
538 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
540 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
541 sizeof(struct hfsplus_cat_file));
542 hfsplus_inode_write_fork(inode, &file->data_fork);
543 if (S_ISREG(inode->i_mode))
544 HFSPLUS_I(inode).dev = inode->i_nlink;
545 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
546 HFSPLUS_I(inode).dev = kdev_t_to_nr(inode->i_rdev);
547 hfsplus_set_perms(inode, &file->permissions);
548 if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE)
549 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
551 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
552 file->access_date = hfsp_ut2mt(inode->i_atime);
553 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
554 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
555 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
556 sizeof(struct hfsplus_cat_file));