2 * linux/fs/hfsplus/xattr.c
4 * Vyacheslav Dubeyko <slava@dubeyko.com>
6 * Logic of processing extended attributes
9 #include "hfsplus_fs.h"
13 const struct xattr_handler *hfsplus_xattr_handlers[] = {
14 &hfsplus_xattr_osx_handler,
15 &hfsplus_xattr_user_handler,
16 &hfsplus_xattr_trusted_handler,
17 #ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
18 &hfsplus_xattr_acl_access_handler,
19 &hfsplus_xattr_acl_default_handler,
21 &hfsplus_xattr_security_handler,
25 static int strcmp_xattr_finder_info(const char *name)
28 return strncmp(name, HFSPLUS_XATTR_FINDER_INFO_NAME,
29 sizeof(HFSPLUS_XATTR_FINDER_INFO_NAME));
34 static int strcmp_xattr_acl(const char *name)
37 return strncmp(name, HFSPLUS_XATTR_ACL_NAME,
38 sizeof(HFSPLUS_XATTR_ACL_NAME));
43 static inline int is_known_namespace(const char *name)
45 if (strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN) &&
46 strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
47 strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) &&
48 strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN))
54 static int can_set_system_xattr(struct inode *inode, const char *name,
55 const void *value, size_t size)
57 #ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
58 struct posix_acl *acl;
61 if (!inode_owner_or_capable(inode))
65 * POSIX_ACL_XATTR_ACCESS is tied to i_mode
67 if (strcmp(name, POSIX_ACL_XATTR_ACCESS) == 0) {
68 acl = posix_acl_from_xattr(&init_user_ns, value, size);
72 err = posix_acl_equiv_mode(acl, &inode->i_mode);
73 posix_acl_release(acl);
76 mark_inode_dirty(inode);
79 * We're changing the ACL. Get rid of the cached one
81 forget_cached_acl(inode, ACL_TYPE_ACCESS);
84 } else if (strcmp(name, POSIX_ACL_XATTR_DEFAULT) == 0) {
85 acl = posix_acl_from_xattr(&init_user_ns, value, size);
88 posix_acl_release(acl);
91 * We're changing the default ACL. Get rid of the cached one
93 forget_cached_acl(inode, ACL_TYPE_DEFAULT);
97 #endif /* CONFIG_HFSPLUS_FS_POSIX_ACL */
101 static int can_set_xattr(struct inode *inode, const char *name,
102 const void *value, size_t value_len)
104 if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
105 return can_set_system_xattr(inode, name, value, value_len);
107 if (!strncmp(name, XATTR_MAC_OSX_PREFIX, XATTR_MAC_OSX_PREFIX_LEN)) {
109 * This makes sure that we aren't trying to set an
110 * attribute in a different namespace by prefixing it
113 if (is_known_namespace(name + XATTR_MAC_OSX_PREFIX_LEN))
120 * Don't allow setting an attribute in an unknown namespace.
122 if (strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) &&
123 strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) &&
124 strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
130 static void hfsplus_init_header_node(struct inode *attr_file,
132 char *buf, size_t node_size)
134 struct hfs_bnode_desc *desc;
135 struct hfs_btree_header_rec *head;
138 u32 hdr_node_map_rec_bits;
143 hfs_dbg(ATTR_MOD, "init_hdr_attr_file: clump %u, node_size %zu\n",
144 clump_size, node_size);
146 /* The end of the node contains list of record offsets */
147 rec_offsets = (__be16 *)(buf + node_size);
149 desc = (struct hfs_bnode_desc *)buf;
150 desc->type = HFS_NODE_HEADER;
151 desc->num_recs = cpu_to_be16(HFSPLUS_BTREE_HDR_NODE_RECS_COUNT);
152 offset = sizeof(struct hfs_bnode_desc);
153 *--rec_offsets = cpu_to_be16(offset);
155 head = (struct hfs_btree_header_rec *)(buf + offset);
156 head->node_size = cpu_to_be16(node_size);
157 head->node_count = cpu_to_be32(i_size_read(attr_file) / node_size);
158 head->free_nodes = cpu_to_be32(be32_to_cpu(head->node_count) - 1);
159 head->clump_size = cpu_to_be32(clump_size);
160 head->attributes |= cpu_to_be32(HFS_TREE_BIGKEYS | HFS_TREE_VARIDXKEYS);
161 head->max_key_len = cpu_to_be16(HFSPLUS_ATTR_KEYLEN - sizeof(u16));
162 offset += sizeof(struct hfs_btree_header_rec);
163 *--rec_offsets = cpu_to_be16(offset);
164 offset += HFSPLUS_BTREE_HDR_USER_BYTES;
165 *--rec_offsets = cpu_to_be16(offset);
167 hdr_node_map_rec_bits = 8 * (node_size - offset - (4 * sizeof(u16)));
168 if (be32_to_cpu(head->node_count) > hdr_node_map_rec_bits) {
172 desc->next = cpu_to_be32(be32_to_cpu(head->leaf_tail) + 1);
173 map_node_bits = 8 * (node_size - sizeof(struct hfs_bnode_desc) -
174 (2 * sizeof(u16)) - 2);
175 map_nodes = (be32_to_cpu(head->node_count) -
176 hdr_node_map_rec_bits +
177 (map_node_bits - 1)) / map_node_bits;
178 be32_add_cpu(&head->free_nodes, 0 - map_nodes);
183 be32_to_cpu(head->node_count) - be32_to_cpu(head->free_nodes);
184 used_bmp_bytes = used_nodes / 8;
185 if (used_bmp_bytes) {
186 memset(bmp, 0xFF, used_bmp_bytes);
187 bmp += used_bmp_bytes;
190 *bmp = ~(0xFF >> used_nodes);
191 offset += hdr_node_map_rec_bits / 8;
192 *--rec_offsets = cpu_to_be16(offset);
195 static int hfsplus_create_attributes_file(struct super_block *sb)
198 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
199 struct inode *attr_file;
200 struct hfsplus_inode_info *hip;
202 u16 node_size = HFSPLUS_ATTR_TREE_NODE_SIZE;
205 struct address_space *mapping;
207 int old_state = HFSPLUS_EMPTY_ATTR_TREE;
209 hfs_dbg(ATTR_MOD, "create_attr_file: ino %d\n", HFSPLUS_ATTR_CNID);
211 check_attr_tree_state_again:
212 switch (atomic_read(&sbi->attr_tree_state)) {
213 case HFSPLUS_EMPTY_ATTR_TREE:
214 if (old_state != atomic_cmpxchg(&sbi->attr_tree_state,
216 HFSPLUS_CREATING_ATTR_TREE))
217 goto check_attr_tree_state_again;
219 case HFSPLUS_CREATING_ATTR_TREE:
221 * This state means that another thread is in process
222 * of AttributesFile creation. Theoretically, it is
223 * possible to be here. But really __setxattr() method
224 * first of all calls hfs_find_init() for lookup in
225 * B-tree of CatalogFile. This method locks mutex of
226 * CatalogFile's B-tree. As a result, if some thread
227 * is inside AttributedFile creation operation then
228 * another threads will be waiting unlocking of
229 * CatalogFile's B-tree's mutex. However, if code will
230 * change then we will return error code (-EAGAIN) from
231 * here. Really, it means that first try to set of xattr
232 * fails with error but second attempt will have success.
235 case HFSPLUS_VALID_ATTR_TREE:
237 case HFSPLUS_FAILED_ATTR_TREE:
243 attr_file = hfsplus_iget(sb, HFSPLUS_ATTR_CNID);
244 if (IS_ERR(attr_file)) {
245 pr_err("failed to load attributes file\n");
246 return PTR_ERR(attr_file);
249 BUG_ON(i_size_read(attr_file) != 0);
251 hip = HFSPLUS_I(attr_file);
253 clump_size = hfsplus_calc_btree_clump_size(sb->s_blocksize,
258 mutex_lock(&hip->extents_lock);
259 hip->clump_blocks = clump_size >> sbi->alloc_blksz_shift;
260 mutex_unlock(&hip->extents_lock);
262 if (sbi->free_blocks <= (hip->clump_blocks << 1)) {
264 goto end_attr_file_creation;
267 while (hip->alloc_blocks < hip->clump_blocks) {
268 err = hfsplus_file_extend(attr_file);
270 pr_err("failed to extend attributes file\n");
271 goto end_attr_file_creation;
273 hip->phys_size = attr_file->i_size =
274 (loff_t)hip->alloc_blocks << sbi->alloc_blksz_shift;
275 hip->fs_blocks = hip->alloc_blocks << sbi->fs_shift;
276 inode_set_bytes(attr_file, attr_file->i_size);
279 buf = kzalloc(node_size, GFP_NOFS);
281 pr_err("failed to allocate memory for header node\n");
283 goto end_attr_file_creation;
286 hfsplus_init_header_node(attr_file, clump_size, buf, node_size);
288 mapping = attr_file->i_mapping;
292 for (; written < node_size; index++, written += PAGE_CACHE_SIZE) {
295 page = read_mapping_page(mapping, index, NULL);
298 goto failed_header_node_init;
301 kaddr = kmap_atomic(page);
302 memcpy(kaddr, buf + written,
303 min_t(size_t, PAGE_CACHE_SIZE, node_size - written));
304 kunmap_atomic(kaddr);
306 set_page_dirty(page);
307 page_cache_release(page);
310 hfsplus_mark_inode_dirty(attr_file, HFSPLUS_I_ATTR_DIRTY);
312 sbi->attr_tree = hfs_btree_open(sb, HFSPLUS_ATTR_CNID);
314 pr_err("failed to load attributes file\n");
316 failed_header_node_init:
319 end_attr_file_creation:
323 atomic_set(&sbi->attr_tree_state, HFSPLUS_VALID_ATTR_TREE);
324 else if (err == -ENOSPC)
325 atomic_set(&sbi->attr_tree_state, HFSPLUS_EMPTY_ATTR_TREE);
327 atomic_set(&sbi->attr_tree_state, HFSPLUS_FAILED_ATTR_TREE);
332 int __hfsplus_setxattr(struct inode *inode, const char *name,
333 const void *value, size_t size, int flags)
336 struct hfs_find_data cat_fd;
337 hfsplus_cat_entry entry;
338 u16 cat_entry_flags, cat_entry_type;
339 u16 folder_finderinfo_len = sizeof(struct DInfo) +
340 sizeof(struct DXInfo);
341 u16 file_finderinfo_len = sizeof(struct FInfo) +
342 sizeof(struct FXInfo);
344 if ((!S_ISREG(inode->i_mode) &&
345 !S_ISDIR(inode->i_mode)) ||
346 HFSPLUS_IS_RSRC(inode))
349 err = can_set_xattr(inode, name, value, size);
353 if (strncmp(name, XATTR_MAC_OSX_PREFIX,
354 XATTR_MAC_OSX_PREFIX_LEN) == 0)
355 name += XATTR_MAC_OSX_PREFIX_LEN;
362 err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &cat_fd);
364 pr_err("can't init xattr find struct\n");
368 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &cat_fd);
370 pr_err("catalog searching failed\n");
374 if (!strcmp_xattr_finder_info(name)) {
375 if (flags & XATTR_CREATE) {
376 pr_err("xattr exists yet\n");
380 hfs_bnode_read(cat_fd.bnode, &entry, cat_fd.entryoffset,
381 sizeof(hfsplus_cat_entry));
382 if (be16_to_cpu(entry.type) == HFSPLUS_FOLDER) {
383 if (size == folder_finderinfo_len) {
384 memcpy(&entry.folder.user_info, value,
385 folder_finderinfo_len);
386 hfs_bnode_write(cat_fd.bnode, &entry,
388 sizeof(struct hfsplus_cat_folder));
389 hfsplus_mark_inode_dirty(inode,
390 HFSPLUS_I_CAT_DIRTY);
395 } else if (be16_to_cpu(entry.type) == HFSPLUS_FILE) {
396 if (size == file_finderinfo_len) {
397 memcpy(&entry.file.user_info, value,
398 file_finderinfo_len);
399 hfs_bnode_write(cat_fd.bnode, &entry,
401 sizeof(struct hfsplus_cat_file));
402 hfsplus_mark_inode_dirty(inode,
403 HFSPLUS_I_CAT_DIRTY);
415 if (!HFSPLUS_SB(inode->i_sb)->attr_tree) {
416 err = hfsplus_create_attributes_file(inode->i_sb);
421 if (hfsplus_attr_exists(inode, name)) {
422 if (flags & XATTR_CREATE) {
423 pr_err("xattr exists yet\n");
427 err = hfsplus_delete_attr(inode, name);
430 err = hfsplus_create_attr(inode, name, value, size);
434 if (flags & XATTR_REPLACE) {
435 pr_err("cannot replace xattr\n");
439 err = hfsplus_create_attr(inode, name, value, size);
444 cat_entry_type = hfs_bnode_read_u16(cat_fd.bnode, cat_fd.entryoffset);
445 if (cat_entry_type == HFSPLUS_FOLDER) {
446 cat_entry_flags = hfs_bnode_read_u16(cat_fd.bnode,
448 offsetof(struct hfsplus_cat_folder, flags));
449 cat_entry_flags |= HFSPLUS_XATTR_EXISTS;
450 if (!strcmp_xattr_acl(name))
451 cat_entry_flags |= HFSPLUS_ACL_EXISTS;
452 hfs_bnode_write_u16(cat_fd.bnode, cat_fd.entryoffset +
453 offsetof(struct hfsplus_cat_folder, flags),
455 hfsplus_mark_inode_dirty(inode, HFSPLUS_I_CAT_DIRTY);
456 } else if (cat_entry_type == HFSPLUS_FILE) {
457 cat_entry_flags = hfs_bnode_read_u16(cat_fd.bnode,
459 offsetof(struct hfsplus_cat_file, flags));
460 cat_entry_flags |= HFSPLUS_XATTR_EXISTS;
461 if (!strcmp_xattr_acl(name))
462 cat_entry_flags |= HFSPLUS_ACL_EXISTS;
463 hfs_bnode_write_u16(cat_fd.bnode, cat_fd.entryoffset +
464 offsetof(struct hfsplus_cat_file, flags),
466 hfsplus_mark_inode_dirty(inode, HFSPLUS_I_CAT_DIRTY);
468 pr_err("invalid catalog entry type\n");
474 hfs_find_exit(&cat_fd);
478 static inline int is_osx_xattr(const char *xattr_name)
480 return !is_known_namespace(xattr_name);
483 static int name_len(const char *xattr_name, int xattr_name_len)
485 int len = xattr_name_len + 1;
487 if (is_osx_xattr(xattr_name))
488 len += XATTR_MAC_OSX_PREFIX_LEN;
493 static int copy_name(char *buffer, const char *xattr_name, int name_len)
498 if (is_osx_xattr(xattr_name)) {
499 strncpy(buffer, XATTR_MAC_OSX_PREFIX, XATTR_MAC_OSX_PREFIX_LEN);
500 offset += XATTR_MAC_OSX_PREFIX_LEN;
501 len += XATTR_MAC_OSX_PREFIX_LEN;
504 strncpy(buffer + offset, xattr_name, name_len);
505 memset(buffer + offset + name_len, 0, 1);
511 static ssize_t hfsplus_getxattr_finder_info(struct inode *inode,
512 void *value, size_t size)
515 struct hfs_find_data fd;
517 u16 folder_rec_len = sizeof(struct DInfo) + sizeof(struct DXInfo);
518 u16 file_rec_len = sizeof(struct FInfo) + sizeof(struct FXInfo);
519 u16 record_len = max(folder_rec_len, file_rec_len);
520 u8 folder_finder_info[sizeof(struct DInfo) + sizeof(struct DXInfo)];
521 u8 file_finder_info[sizeof(struct FInfo) + sizeof(struct FXInfo)];
523 if (size >= record_len) {
524 res = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd);
526 pr_err("can't init xattr find struct\n");
529 res = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
531 goto end_getxattr_finder_info;
532 entry_type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset);
534 if (entry_type == HFSPLUS_FOLDER) {
535 hfs_bnode_read(fd.bnode, folder_finder_info,
537 offsetof(struct hfsplus_cat_folder, user_info),
539 memcpy(value, folder_finder_info, folder_rec_len);
540 res = folder_rec_len;
541 } else if (entry_type == HFSPLUS_FILE) {
542 hfs_bnode_read(fd.bnode, file_finder_info,
544 offsetof(struct hfsplus_cat_file, user_info),
546 memcpy(value, file_finder_info, file_rec_len);
550 goto end_getxattr_finder_info;
553 res = size ? -ERANGE : record_len;
555 end_getxattr_finder_info:
556 if (size >= record_len)
561 ssize_t __hfsplus_getxattr(struct inode *inode, const char *name,
562 void *value, size_t size)
564 struct hfs_find_data fd;
565 hfsplus_attr_entry *entry;
566 __be32 xattr_record_type;
568 u16 record_length = 0;
571 if ((!S_ISREG(inode->i_mode) &&
572 !S_ISDIR(inode->i_mode)) ||
573 HFSPLUS_IS_RSRC(inode))
576 if (strncmp(name, XATTR_MAC_OSX_PREFIX,
577 XATTR_MAC_OSX_PREFIX_LEN) == 0) {
578 /* skip "osx." prefix */
579 name += XATTR_MAC_OSX_PREFIX_LEN;
581 * Don't allow retrieving properly prefixed attributes
582 * by prepending them with "osx."
584 if (is_known_namespace(name))
588 if (!strcmp_xattr_finder_info(name))
589 return hfsplus_getxattr_finder_info(inode, value, size);
591 if (!HFSPLUS_SB(inode->i_sb)->attr_tree)
594 entry = hfsplus_alloc_attr_entry();
596 pr_err("can't allocate xattr entry\n");
600 res = hfs_find_init(HFSPLUS_SB(inode->i_sb)->attr_tree, &fd);
602 pr_err("can't init xattr find struct\n");
603 goto failed_getxattr_init;
606 res = hfsplus_find_attr(inode->i_sb, inode->i_ino, name, &fd);
611 pr_err("xattr searching failed\n");
615 hfs_bnode_read(fd.bnode, &xattr_record_type,
616 fd.entryoffset, sizeof(xattr_record_type));
617 record_type = be32_to_cpu(xattr_record_type);
618 if (record_type == HFSPLUS_ATTR_INLINE_DATA) {
619 record_length = hfs_bnode_read_u16(fd.bnode,
621 offsetof(struct hfsplus_attr_inline_data,
623 if (record_length > HFSPLUS_MAX_INLINE_DATA_SIZE) {
624 pr_err("invalid xattr record size\n");
628 } else if (record_type == HFSPLUS_ATTR_FORK_DATA ||
629 record_type == HFSPLUS_ATTR_EXTENTS) {
630 pr_err("only inline data xattr are supported\n");
634 pr_err("invalid xattr record\n");
640 hfs_bnode_read(fd.bnode, entry, fd.entryoffset,
641 offsetof(struct hfsplus_attr_inline_data,
642 raw_bytes) + record_length);
645 if (size >= record_length) {
646 memcpy(value, entry->inline_data.raw_bytes, record_length);
649 res = size ? -ERANGE : record_length;
654 failed_getxattr_init:
655 hfsplus_destroy_attr_entry(entry);
659 static inline int can_list(const char *xattr_name)
664 return strncmp(xattr_name, XATTR_TRUSTED_PREFIX,
665 XATTR_TRUSTED_PREFIX_LEN) ||
666 capable(CAP_SYS_ADMIN);
669 static ssize_t hfsplus_listxattr_finder_info(struct dentry *dentry,
670 char *buffer, size_t size)
673 struct inode *inode = dentry->d_inode;
674 struct hfs_find_data fd;
676 u8 folder_finder_info[sizeof(struct DInfo) + sizeof(struct DXInfo)];
677 u8 file_finder_info[sizeof(struct FInfo) + sizeof(struct FXInfo)];
678 unsigned long len, found_bit;
679 int xattr_name_len, symbols_count;
681 res = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd);
683 pr_err("can't init xattr find struct\n");
687 res = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
689 goto end_listxattr_finder_info;
691 entry_type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset);
692 if (entry_type == HFSPLUS_FOLDER) {
693 len = sizeof(struct DInfo) + sizeof(struct DXInfo);
694 hfs_bnode_read(fd.bnode, folder_finder_info,
696 offsetof(struct hfsplus_cat_folder, user_info),
698 found_bit = find_first_bit((void *)folder_finder_info, len*8);
699 } else if (entry_type == HFSPLUS_FILE) {
700 len = sizeof(struct FInfo) + sizeof(struct FXInfo);
701 hfs_bnode_read(fd.bnode, file_finder_info,
703 offsetof(struct hfsplus_cat_file, user_info),
705 found_bit = find_first_bit((void *)file_finder_info, len*8);
708 goto end_listxattr_finder_info;
711 if (found_bit >= (len*8))
714 symbols_count = sizeof(HFSPLUS_XATTR_FINDER_INFO_NAME) - 1;
716 name_len(HFSPLUS_XATTR_FINDER_INFO_NAME, symbols_count);
717 if (!buffer || !size) {
718 if (can_list(HFSPLUS_XATTR_FINDER_INFO_NAME))
719 res = xattr_name_len;
720 } else if (can_list(HFSPLUS_XATTR_FINDER_INFO_NAME)) {
721 if (size < xattr_name_len)
724 res = copy_name(buffer,
725 HFSPLUS_XATTR_FINDER_INFO_NAME,
731 end_listxattr_finder_info:
737 ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size)
741 struct inode *inode = dentry->d_inode;
742 struct hfs_find_data fd;
744 struct hfsplus_attr_key attr_key;
745 char strbuf[HFSPLUS_ATTR_MAX_STRLEN +
746 XATTR_MAC_OSX_PREFIX_LEN + 1] = {0};
749 if ((!S_ISREG(inode->i_mode) &&
750 !S_ISDIR(inode->i_mode)) ||
751 HFSPLUS_IS_RSRC(inode))
754 res = hfsplus_listxattr_finder_info(dentry, buffer, size);
757 else if (!HFSPLUS_SB(inode->i_sb)->attr_tree)
758 return (res == 0) ? -EOPNOTSUPP : res;
760 err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->attr_tree, &fd);
762 pr_err("can't init xattr find struct\n");
766 err = hfsplus_find_attr(inode->i_sb, inode->i_ino, NULL, &fd);
768 if (err == -ENOENT) {
779 key_len = hfs_bnode_read_u16(fd.bnode, fd.keyoffset);
780 if (key_len == 0 || key_len > fd.tree->max_key_len) {
781 pr_err("invalid xattr key length: %d\n", key_len);
786 hfs_bnode_read(fd.bnode, &attr_key,
787 fd.keyoffset, key_len + sizeof(key_len));
789 if (be32_to_cpu(attr_key.cnid) != inode->i_ino)
792 xattr_name_len = HFSPLUS_ATTR_MAX_STRLEN;
793 if (hfsplus_uni2asc(inode->i_sb,
794 (const struct hfsplus_unistr *)&fd.key->attr.key_name,
795 strbuf, &xattr_name_len)) {
796 pr_err("unicode conversion failed\n");
801 if (!buffer || !size) {
802 if (can_list(strbuf))
803 res += name_len(strbuf, xattr_name_len);
804 } else if (can_list(strbuf)) {
805 if (size < (res + name_len(strbuf, xattr_name_len))) {
809 res += copy_name(buffer + res,
810 strbuf, xattr_name_len);
813 if (hfs_brec_goto(&fd, 1))
822 int hfsplus_removexattr(struct dentry *dentry, const char *name)
825 struct inode *inode = dentry->d_inode;
826 struct hfs_find_data cat_fd;
829 int is_xattr_acl_deleted = 0;
830 int is_all_xattrs_deleted = 0;
832 if ((!S_ISREG(inode->i_mode) &&
833 !S_ISDIR(inode->i_mode)) ||
834 HFSPLUS_IS_RSRC(inode))
837 if (!HFSPLUS_SB(inode->i_sb)->attr_tree)
840 err = can_set_xattr(inode, name, NULL, 0);
844 if (strncmp(name, XATTR_MAC_OSX_PREFIX,
845 XATTR_MAC_OSX_PREFIX_LEN) == 0)
846 name += XATTR_MAC_OSX_PREFIX_LEN;
848 if (!strcmp_xattr_finder_info(name))
851 err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &cat_fd);
853 pr_err("can't init xattr find struct\n");
857 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &cat_fd);
859 pr_err("catalog searching failed\n");
860 goto end_removexattr;
863 err = hfsplus_delete_attr(inode, name);
865 goto end_removexattr;
867 is_xattr_acl_deleted = !strcmp_xattr_acl(name);
868 is_all_xattrs_deleted = !hfsplus_attr_exists(inode, NULL);
870 if (!is_xattr_acl_deleted && !is_all_xattrs_deleted)
871 goto end_removexattr;
873 cat_entry_type = hfs_bnode_read_u16(cat_fd.bnode, cat_fd.entryoffset);
875 if (cat_entry_type == HFSPLUS_FOLDER) {
876 flags = hfs_bnode_read_u16(cat_fd.bnode, cat_fd.entryoffset +
877 offsetof(struct hfsplus_cat_folder, flags));
878 if (is_xattr_acl_deleted)
879 flags &= ~HFSPLUS_ACL_EXISTS;
880 if (is_all_xattrs_deleted)
881 flags &= ~HFSPLUS_XATTR_EXISTS;
882 hfs_bnode_write_u16(cat_fd.bnode, cat_fd.entryoffset +
883 offsetof(struct hfsplus_cat_folder, flags),
885 hfsplus_mark_inode_dirty(inode, HFSPLUS_I_CAT_DIRTY);
886 } else if (cat_entry_type == HFSPLUS_FILE) {
887 flags = hfs_bnode_read_u16(cat_fd.bnode, cat_fd.entryoffset +
888 offsetof(struct hfsplus_cat_file, flags));
889 if (is_xattr_acl_deleted)
890 flags &= ~HFSPLUS_ACL_EXISTS;
891 if (is_all_xattrs_deleted)
892 flags &= ~HFSPLUS_XATTR_EXISTS;
893 hfs_bnode_write_u16(cat_fd.bnode, cat_fd.entryoffset +
894 offsetof(struct hfsplus_cat_file, flags),
896 hfsplus_mark_inode_dirty(inode, HFSPLUS_I_CAT_DIRTY);
898 pr_err("invalid catalog entry type\n");
900 goto end_removexattr;
904 hfs_find_exit(&cat_fd);
908 static int hfsplus_osx_getxattr(struct dentry *dentry, const char *name,
909 void *buffer, size_t size, int type)
911 char xattr_name[HFSPLUS_ATTR_MAX_STRLEN +
912 XATTR_MAC_OSX_PREFIX_LEN + 1] = {0};
913 size_t len = strlen(name);
915 if (!strcmp(name, ""))
918 if (len > HFSPLUS_ATTR_MAX_STRLEN)
921 strcpy(xattr_name, XATTR_MAC_OSX_PREFIX);
922 strcpy(xattr_name + XATTR_MAC_OSX_PREFIX_LEN, name);
924 return hfsplus_getxattr(dentry, xattr_name, buffer, size);
927 static int hfsplus_osx_setxattr(struct dentry *dentry, const char *name,
928 const void *buffer, size_t size, int flags, int type)
930 char xattr_name[HFSPLUS_ATTR_MAX_STRLEN +
931 XATTR_MAC_OSX_PREFIX_LEN + 1] = {0};
932 size_t len = strlen(name);
934 if (!strcmp(name, ""))
937 if (len > HFSPLUS_ATTR_MAX_STRLEN)
940 strcpy(xattr_name, XATTR_MAC_OSX_PREFIX);
941 strcpy(xattr_name + XATTR_MAC_OSX_PREFIX_LEN, name);
943 return hfsplus_setxattr(dentry, xattr_name, buffer, size, flags);
946 static size_t hfsplus_osx_listxattr(struct dentry *dentry, char *list,
947 size_t list_size, const char *name, size_t name_len, int type)
950 * This method is not used.
951 * It is used hfsplus_listxattr() instead of generic_listxattr().
956 const struct xattr_handler hfsplus_xattr_osx_handler = {
957 .prefix = XATTR_MAC_OSX_PREFIX,
958 .list = hfsplus_osx_listxattr,
959 .get = hfsplus_osx_getxattr,
960 .set = hfsplus_osx_setxattr,