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, u16 node_size)
134 struct hfs_bnode_desc *desc;
135 struct hfs_btree_header_rec *head;
138 u32 hdr_node_map_rec_bits;
144 hfs_dbg(ATTR_MOD, "init_hdr_attr_file: clump %u, node_size %u\n",
145 clump_size, node_size);
147 /* The end of the node contains list of record offsets */
148 rec_offsets = (__be16 *)(buf + node_size);
150 desc = (struct hfs_bnode_desc *)buf;
151 desc->type = HFS_NODE_HEADER;
152 desc->num_recs = cpu_to_be16(HFSPLUS_BTREE_HDR_NODE_RECS_COUNT);
153 offset = sizeof(struct hfs_bnode_desc);
154 *--rec_offsets = cpu_to_be16(offset);
156 head = (struct hfs_btree_header_rec *)(buf + offset);
157 head->node_size = cpu_to_be16(node_size);
158 tmp = i_size_read(attr_file);
159 do_div(tmp, node_size);
160 head->node_count = cpu_to_be32(tmp);
161 head->free_nodes = cpu_to_be32(be32_to_cpu(head->node_count) - 1);
162 head->clump_size = cpu_to_be32(clump_size);
163 head->attributes |= cpu_to_be32(HFS_TREE_BIGKEYS | HFS_TREE_VARIDXKEYS);
164 head->max_key_len = cpu_to_be16(HFSPLUS_ATTR_KEYLEN - sizeof(u16));
165 offset += sizeof(struct hfs_btree_header_rec);
166 *--rec_offsets = cpu_to_be16(offset);
167 offset += HFSPLUS_BTREE_HDR_USER_BYTES;
168 *--rec_offsets = cpu_to_be16(offset);
170 hdr_node_map_rec_bits = 8 * (node_size - offset - (4 * sizeof(u16)));
171 if (be32_to_cpu(head->node_count) > hdr_node_map_rec_bits) {
175 desc->next = cpu_to_be32(be32_to_cpu(head->leaf_tail) + 1);
176 map_node_bits = 8 * (node_size - sizeof(struct hfs_bnode_desc) -
177 (2 * sizeof(u16)) - 2);
178 map_nodes = (be32_to_cpu(head->node_count) -
179 hdr_node_map_rec_bits +
180 (map_node_bits - 1)) / map_node_bits;
181 be32_add_cpu(&head->free_nodes, 0 - map_nodes);
186 be32_to_cpu(head->node_count) - be32_to_cpu(head->free_nodes);
187 used_bmp_bytes = used_nodes / 8;
188 if (used_bmp_bytes) {
189 memset(bmp, 0xFF, used_bmp_bytes);
190 bmp += used_bmp_bytes;
193 *bmp = ~(0xFF >> used_nodes);
194 offset += hdr_node_map_rec_bits / 8;
195 *--rec_offsets = cpu_to_be16(offset);
198 static int hfsplus_create_attributes_file(struct super_block *sb)
201 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
202 struct inode *attr_file;
203 struct hfsplus_inode_info *hip;
205 u16 node_size = HFSPLUS_ATTR_TREE_NODE_SIZE;
208 struct address_space *mapping;
210 int old_state = HFSPLUS_EMPTY_ATTR_TREE;
212 hfs_dbg(ATTR_MOD, "create_attr_file: ino %d\n", HFSPLUS_ATTR_CNID);
214 check_attr_tree_state_again:
215 switch (atomic_read(&sbi->attr_tree_state)) {
216 case HFSPLUS_EMPTY_ATTR_TREE:
217 if (old_state != atomic_cmpxchg(&sbi->attr_tree_state,
219 HFSPLUS_CREATING_ATTR_TREE))
220 goto check_attr_tree_state_again;
222 case HFSPLUS_CREATING_ATTR_TREE:
224 * This state means that another thread is in process
225 * of AttributesFile creation. Theoretically, it is
226 * possible to be here. But really __setxattr() method
227 * first of all calls hfs_find_init() for lookup in
228 * B-tree of CatalogFile. This method locks mutex of
229 * CatalogFile's B-tree. As a result, if some thread
230 * is inside AttributedFile creation operation then
231 * another threads will be waiting unlocking of
232 * CatalogFile's B-tree's mutex. However, if code will
233 * change then we will return error code (-EAGAIN) from
234 * here. Really, it means that first try to set of xattr
235 * fails with error but second attempt will have success.
238 case HFSPLUS_VALID_ATTR_TREE:
240 case HFSPLUS_FAILED_ATTR_TREE:
246 attr_file = hfsplus_iget(sb, HFSPLUS_ATTR_CNID);
247 if (IS_ERR(attr_file)) {
248 pr_err("failed to load attributes file\n");
249 return PTR_ERR(attr_file);
252 BUG_ON(i_size_read(attr_file) != 0);
254 hip = HFSPLUS_I(attr_file);
256 clump_size = hfsplus_calc_btree_clump_size(sb->s_blocksize,
261 mutex_lock(&hip->extents_lock);
262 hip->clump_blocks = clump_size >> sbi->alloc_blksz_shift;
263 mutex_unlock(&hip->extents_lock);
265 if (sbi->free_blocks <= (hip->clump_blocks << 1)) {
267 goto end_attr_file_creation;
270 while (hip->alloc_blocks < hip->clump_blocks) {
271 err = hfsplus_file_extend(attr_file);
273 pr_err("failed to extend attributes file\n");
274 goto end_attr_file_creation;
276 hip->phys_size = attr_file->i_size =
277 (loff_t)hip->alloc_blocks << sbi->alloc_blksz_shift;
278 hip->fs_blocks = hip->alloc_blocks << sbi->fs_shift;
279 inode_set_bytes(attr_file, attr_file->i_size);
282 buf = kzalloc(node_size, GFP_NOFS);
284 pr_err("failed to allocate memory for header node\n");
286 goto end_attr_file_creation;
289 hfsplus_init_header_node(attr_file, clump_size, buf, node_size);
291 mapping = attr_file->i_mapping;
295 for (; written < node_size; index++, written += PAGE_CACHE_SIZE) {
298 page = read_mapping_page(mapping, index, NULL);
301 goto failed_header_node_init;
304 kaddr = kmap_atomic(page);
305 memcpy(kaddr, buf + written,
306 min_t(size_t, PAGE_CACHE_SIZE, node_size - written));
307 kunmap_atomic(kaddr);
309 set_page_dirty(page);
310 page_cache_release(page);
313 hfsplus_mark_inode_dirty(attr_file, HFSPLUS_I_ATTR_DIRTY);
315 sbi->attr_tree = hfs_btree_open(sb, HFSPLUS_ATTR_CNID);
317 pr_err("failed to load attributes file\n");
319 failed_header_node_init:
322 end_attr_file_creation:
326 atomic_set(&sbi->attr_tree_state, HFSPLUS_VALID_ATTR_TREE);
327 else if (err == -ENOSPC)
328 atomic_set(&sbi->attr_tree_state, HFSPLUS_EMPTY_ATTR_TREE);
330 atomic_set(&sbi->attr_tree_state, HFSPLUS_FAILED_ATTR_TREE);
335 int __hfsplus_setxattr(struct inode *inode, const char *name,
336 const void *value, size_t size, int flags)
339 struct hfs_find_data cat_fd;
340 hfsplus_cat_entry entry;
341 u16 cat_entry_flags, cat_entry_type;
342 u16 folder_finderinfo_len = sizeof(struct DInfo) +
343 sizeof(struct DXInfo);
344 u16 file_finderinfo_len = sizeof(struct FInfo) +
345 sizeof(struct FXInfo);
347 if ((!S_ISREG(inode->i_mode) &&
348 !S_ISDIR(inode->i_mode)) ||
349 HFSPLUS_IS_RSRC(inode))
352 err = can_set_xattr(inode, name, value, size);
356 if (strncmp(name, XATTR_MAC_OSX_PREFIX,
357 XATTR_MAC_OSX_PREFIX_LEN) == 0)
358 name += XATTR_MAC_OSX_PREFIX_LEN;
365 err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &cat_fd);
367 pr_err("can't init xattr find struct\n");
371 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &cat_fd);
373 pr_err("catalog searching failed\n");
377 if (!strcmp_xattr_finder_info(name)) {
378 if (flags & XATTR_CREATE) {
379 pr_err("xattr exists yet\n");
383 hfs_bnode_read(cat_fd.bnode, &entry, cat_fd.entryoffset,
384 sizeof(hfsplus_cat_entry));
385 if (be16_to_cpu(entry.type) == HFSPLUS_FOLDER) {
386 if (size == folder_finderinfo_len) {
387 memcpy(&entry.folder.user_info, value,
388 folder_finderinfo_len);
389 hfs_bnode_write(cat_fd.bnode, &entry,
391 sizeof(struct hfsplus_cat_folder));
392 hfsplus_mark_inode_dirty(inode,
393 HFSPLUS_I_CAT_DIRTY);
398 } else if (be16_to_cpu(entry.type) == HFSPLUS_FILE) {
399 if (size == file_finderinfo_len) {
400 memcpy(&entry.file.user_info, value,
401 file_finderinfo_len);
402 hfs_bnode_write(cat_fd.bnode, &entry,
404 sizeof(struct hfsplus_cat_file));
405 hfsplus_mark_inode_dirty(inode,
406 HFSPLUS_I_CAT_DIRTY);
418 if (!HFSPLUS_SB(inode->i_sb)->attr_tree) {
419 err = hfsplus_create_attributes_file(inode->i_sb);
424 if (hfsplus_attr_exists(inode, name)) {
425 if (flags & XATTR_CREATE) {
426 pr_err("xattr exists yet\n");
430 err = hfsplus_delete_attr(inode, name);
433 err = hfsplus_create_attr(inode, name, value, size);
437 if (flags & XATTR_REPLACE) {
438 pr_err("cannot replace xattr\n");
442 err = hfsplus_create_attr(inode, name, value, size);
447 cat_entry_type = hfs_bnode_read_u16(cat_fd.bnode, cat_fd.entryoffset);
448 if (cat_entry_type == HFSPLUS_FOLDER) {
449 cat_entry_flags = hfs_bnode_read_u16(cat_fd.bnode,
451 offsetof(struct hfsplus_cat_folder, flags));
452 cat_entry_flags |= HFSPLUS_XATTR_EXISTS;
453 if (!strcmp_xattr_acl(name))
454 cat_entry_flags |= HFSPLUS_ACL_EXISTS;
455 hfs_bnode_write_u16(cat_fd.bnode, cat_fd.entryoffset +
456 offsetof(struct hfsplus_cat_folder, flags),
458 hfsplus_mark_inode_dirty(inode, HFSPLUS_I_CAT_DIRTY);
459 } else if (cat_entry_type == HFSPLUS_FILE) {
460 cat_entry_flags = hfs_bnode_read_u16(cat_fd.bnode,
462 offsetof(struct hfsplus_cat_file, flags));
463 cat_entry_flags |= HFSPLUS_XATTR_EXISTS;
464 if (!strcmp_xattr_acl(name))
465 cat_entry_flags |= HFSPLUS_ACL_EXISTS;
466 hfs_bnode_write_u16(cat_fd.bnode, cat_fd.entryoffset +
467 offsetof(struct hfsplus_cat_file, flags),
469 hfsplus_mark_inode_dirty(inode, HFSPLUS_I_CAT_DIRTY);
471 pr_err("invalid catalog entry type\n");
477 hfs_find_exit(&cat_fd);
481 static inline int is_osx_xattr(const char *xattr_name)
483 return !is_known_namespace(xattr_name);
486 static int name_len(const char *xattr_name, int xattr_name_len)
488 int len = xattr_name_len + 1;
490 if (is_osx_xattr(xattr_name))
491 len += XATTR_MAC_OSX_PREFIX_LEN;
496 static int copy_name(char *buffer, const char *xattr_name, int name_len)
501 if (is_osx_xattr(xattr_name)) {
502 strncpy(buffer, XATTR_MAC_OSX_PREFIX, XATTR_MAC_OSX_PREFIX_LEN);
503 offset += XATTR_MAC_OSX_PREFIX_LEN;
504 len += XATTR_MAC_OSX_PREFIX_LEN;
507 strncpy(buffer + offset, xattr_name, name_len);
508 memset(buffer + offset + name_len, 0, 1);
514 static ssize_t hfsplus_getxattr_finder_info(struct inode *inode,
515 void *value, size_t size)
518 struct hfs_find_data fd;
520 u16 folder_rec_len = sizeof(struct DInfo) + sizeof(struct DXInfo);
521 u16 file_rec_len = sizeof(struct FInfo) + sizeof(struct FXInfo);
522 u16 record_len = max(folder_rec_len, file_rec_len);
523 u8 folder_finder_info[sizeof(struct DInfo) + sizeof(struct DXInfo)];
524 u8 file_finder_info[sizeof(struct FInfo) + sizeof(struct FXInfo)];
526 if (size >= record_len) {
527 res = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd);
529 pr_err("can't init xattr find struct\n");
532 res = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
534 goto end_getxattr_finder_info;
535 entry_type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset);
537 if (entry_type == HFSPLUS_FOLDER) {
538 hfs_bnode_read(fd.bnode, folder_finder_info,
540 offsetof(struct hfsplus_cat_folder, user_info),
542 memcpy(value, folder_finder_info, folder_rec_len);
543 res = folder_rec_len;
544 } else if (entry_type == HFSPLUS_FILE) {
545 hfs_bnode_read(fd.bnode, file_finder_info,
547 offsetof(struct hfsplus_cat_file, user_info),
549 memcpy(value, file_finder_info, file_rec_len);
553 goto end_getxattr_finder_info;
556 res = size ? -ERANGE : record_len;
558 end_getxattr_finder_info:
559 if (size >= record_len)
564 ssize_t __hfsplus_getxattr(struct inode *inode, const char *name,
565 void *value, size_t size)
567 struct hfs_find_data fd;
568 hfsplus_attr_entry *entry;
569 __be32 xattr_record_type;
571 u16 record_length = 0;
574 if ((!S_ISREG(inode->i_mode) &&
575 !S_ISDIR(inode->i_mode)) ||
576 HFSPLUS_IS_RSRC(inode))
579 if (strncmp(name, XATTR_MAC_OSX_PREFIX,
580 XATTR_MAC_OSX_PREFIX_LEN) == 0) {
581 /* skip "osx." prefix */
582 name += XATTR_MAC_OSX_PREFIX_LEN;
584 * Don't allow retrieving properly prefixed attributes
585 * by prepending them with "osx."
587 if (is_known_namespace(name))
591 if (!strcmp_xattr_finder_info(name))
592 return hfsplus_getxattr_finder_info(inode, value, size);
594 if (!HFSPLUS_SB(inode->i_sb)->attr_tree)
597 entry = hfsplus_alloc_attr_entry();
599 pr_err("can't allocate xattr entry\n");
603 res = hfs_find_init(HFSPLUS_SB(inode->i_sb)->attr_tree, &fd);
605 pr_err("can't init xattr find struct\n");
606 goto failed_getxattr_init;
609 res = hfsplus_find_attr(inode->i_sb, inode->i_ino, name, &fd);
614 pr_err("xattr searching failed\n");
618 hfs_bnode_read(fd.bnode, &xattr_record_type,
619 fd.entryoffset, sizeof(xattr_record_type));
620 record_type = be32_to_cpu(xattr_record_type);
621 if (record_type == HFSPLUS_ATTR_INLINE_DATA) {
622 record_length = hfs_bnode_read_u16(fd.bnode,
624 offsetof(struct hfsplus_attr_inline_data,
626 if (record_length > HFSPLUS_MAX_INLINE_DATA_SIZE) {
627 pr_err("invalid xattr record size\n");
631 } else if (record_type == HFSPLUS_ATTR_FORK_DATA ||
632 record_type == HFSPLUS_ATTR_EXTENTS) {
633 pr_err("only inline data xattr are supported\n");
637 pr_err("invalid xattr record\n");
643 hfs_bnode_read(fd.bnode, entry, fd.entryoffset,
644 offsetof(struct hfsplus_attr_inline_data,
645 raw_bytes) + record_length);
648 if (size >= record_length) {
649 memcpy(value, entry->inline_data.raw_bytes, record_length);
652 res = size ? -ERANGE : record_length;
657 failed_getxattr_init:
658 hfsplus_destroy_attr_entry(entry);
662 static inline int can_list(const char *xattr_name)
667 return strncmp(xattr_name, XATTR_TRUSTED_PREFIX,
668 XATTR_TRUSTED_PREFIX_LEN) ||
669 capable(CAP_SYS_ADMIN);
672 static ssize_t hfsplus_listxattr_finder_info(struct dentry *dentry,
673 char *buffer, size_t size)
676 struct inode *inode = dentry->d_inode;
677 struct hfs_find_data fd;
679 u8 folder_finder_info[sizeof(struct DInfo) + sizeof(struct DXInfo)];
680 u8 file_finder_info[sizeof(struct FInfo) + sizeof(struct FXInfo)];
681 unsigned long len, found_bit;
682 int xattr_name_len, symbols_count;
684 res = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd);
686 pr_err("can't init xattr find struct\n");
690 res = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
692 goto end_listxattr_finder_info;
694 entry_type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset);
695 if (entry_type == HFSPLUS_FOLDER) {
696 len = sizeof(struct DInfo) + sizeof(struct DXInfo);
697 hfs_bnode_read(fd.bnode, folder_finder_info,
699 offsetof(struct hfsplus_cat_folder, user_info),
701 found_bit = find_first_bit((void *)folder_finder_info, len*8);
702 } else if (entry_type == HFSPLUS_FILE) {
703 len = sizeof(struct FInfo) + sizeof(struct FXInfo);
704 hfs_bnode_read(fd.bnode, file_finder_info,
706 offsetof(struct hfsplus_cat_file, user_info),
708 found_bit = find_first_bit((void *)file_finder_info, len*8);
711 goto end_listxattr_finder_info;
714 if (found_bit >= (len*8))
717 symbols_count = sizeof(HFSPLUS_XATTR_FINDER_INFO_NAME) - 1;
719 name_len(HFSPLUS_XATTR_FINDER_INFO_NAME, symbols_count);
720 if (!buffer || !size) {
721 if (can_list(HFSPLUS_XATTR_FINDER_INFO_NAME))
722 res = xattr_name_len;
723 } else if (can_list(HFSPLUS_XATTR_FINDER_INFO_NAME)) {
724 if (size < xattr_name_len)
727 res = copy_name(buffer,
728 HFSPLUS_XATTR_FINDER_INFO_NAME,
734 end_listxattr_finder_info:
740 ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size)
744 struct inode *inode = dentry->d_inode;
745 struct hfs_find_data fd;
747 struct hfsplus_attr_key attr_key;
748 char strbuf[HFSPLUS_ATTR_MAX_STRLEN +
749 XATTR_MAC_OSX_PREFIX_LEN + 1] = {0};
752 if ((!S_ISREG(inode->i_mode) &&
753 !S_ISDIR(inode->i_mode)) ||
754 HFSPLUS_IS_RSRC(inode))
757 res = hfsplus_listxattr_finder_info(dentry, buffer, size);
760 else if (!HFSPLUS_SB(inode->i_sb)->attr_tree)
761 return (res == 0) ? -EOPNOTSUPP : res;
763 err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->attr_tree, &fd);
765 pr_err("can't init xattr find struct\n");
769 err = hfsplus_find_attr(inode->i_sb, inode->i_ino, NULL, &fd);
771 if (err == -ENOENT) {
782 key_len = hfs_bnode_read_u16(fd.bnode, fd.keyoffset);
783 if (key_len == 0 || key_len > fd.tree->max_key_len) {
784 pr_err("invalid xattr key length: %d\n", key_len);
789 hfs_bnode_read(fd.bnode, &attr_key,
790 fd.keyoffset, key_len + sizeof(key_len));
792 if (be32_to_cpu(attr_key.cnid) != inode->i_ino)
795 xattr_name_len = HFSPLUS_ATTR_MAX_STRLEN;
796 if (hfsplus_uni2asc(inode->i_sb,
797 (const struct hfsplus_unistr *)&fd.key->attr.key_name,
798 strbuf, &xattr_name_len)) {
799 pr_err("unicode conversion failed\n");
804 if (!buffer || !size) {
805 if (can_list(strbuf))
806 res += name_len(strbuf, xattr_name_len);
807 } else if (can_list(strbuf)) {
808 if (size < (res + name_len(strbuf, xattr_name_len))) {
812 res += copy_name(buffer + res,
813 strbuf, xattr_name_len);
816 if (hfs_brec_goto(&fd, 1))
825 int hfsplus_removexattr(struct dentry *dentry, const char *name)
828 struct inode *inode = dentry->d_inode;
829 struct hfs_find_data cat_fd;
832 int is_xattr_acl_deleted = 0;
833 int is_all_xattrs_deleted = 0;
835 if ((!S_ISREG(inode->i_mode) &&
836 !S_ISDIR(inode->i_mode)) ||
837 HFSPLUS_IS_RSRC(inode))
840 if (!HFSPLUS_SB(inode->i_sb)->attr_tree)
843 err = can_set_xattr(inode, name, NULL, 0);
847 if (strncmp(name, XATTR_MAC_OSX_PREFIX,
848 XATTR_MAC_OSX_PREFIX_LEN) == 0)
849 name += XATTR_MAC_OSX_PREFIX_LEN;
851 if (!strcmp_xattr_finder_info(name))
854 err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &cat_fd);
856 pr_err("can't init xattr find struct\n");
860 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &cat_fd);
862 pr_err("catalog searching failed\n");
863 goto end_removexattr;
866 err = hfsplus_delete_attr(inode, name);
868 goto end_removexattr;
870 is_xattr_acl_deleted = !strcmp_xattr_acl(name);
871 is_all_xattrs_deleted = !hfsplus_attr_exists(inode, NULL);
873 if (!is_xattr_acl_deleted && !is_all_xattrs_deleted)
874 goto end_removexattr;
876 cat_entry_type = hfs_bnode_read_u16(cat_fd.bnode, cat_fd.entryoffset);
878 if (cat_entry_type == HFSPLUS_FOLDER) {
879 flags = hfs_bnode_read_u16(cat_fd.bnode, cat_fd.entryoffset +
880 offsetof(struct hfsplus_cat_folder, flags));
881 if (is_xattr_acl_deleted)
882 flags &= ~HFSPLUS_ACL_EXISTS;
883 if (is_all_xattrs_deleted)
884 flags &= ~HFSPLUS_XATTR_EXISTS;
885 hfs_bnode_write_u16(cat_fd.bnode, cat_fd.entryoffset +
886 offsetof(struct hfsplus_cat_folder, flags),
888 hfsplus_mark_inode_dirty(inode, HFSPLUS_I_CAT_DIRTY);
889 } else if (cat_entry_type == HFSPLUS_FILE) {
890 flags = hfs_bnode_read_u16(cat_fd.bnode, cat_fd.entryoffset +
891 offsetof(struct hfsplus_cat_file, flags));
892 if (is_xattr_acl_deleted)
893 flags &= ~HFSPLUS_ACL_EXISTS;
894 if (is_all_xattrs_deleted)
895 flags &= ~HFSPLUS_XATTR_EXISTS;
896 hfs_bnode_write_u16(cat_fd.bnode, cat_fd.entryoffset +
897 offsetof(struct hfsplus_cat_file, flags),
899 hfsplus_mark_inode_dirty(inode, HFSPLUS_I_CAT_DIRTY);
901 pr_err("invalid catalog entry type\n");
903 goto end_removexattr;
907 hfs_find_exit(&cat_fd);
911 static int hfsplus_osx_getxattr(struct dentry *dentry, const char *name,
912 void *buffer, size_t size, int type)
914 char xattr_name[HFSPLUS_ATTR_MAX_STRLEN +
915 XATTR_MAC_OSX_PREFIX_LEN + 1] = {0};
916 size_t len = strlen(name);
918 if (!strcmp(name, ""))
921 if (len > HFSPLUS_ATTR_MAX_STRLEN)
924 strcpy(xattr_name, XATTR_MAC_OSX_PREFIX);
925 strcpy(xattr_name + XATTR_MAC_OSX_PREFIX_LEN, name);
927 return hfsplus_getxattr(dentry, xattr_name, buffer, size);
930 static int hfsplus_osx_setxattr(struct dentry *dentry, const char *name,
931 const void *buffer, size_t size, int flags, int type)
933 char xattr_name[HFSPLUS_ATTR_MAX_STRLEN +
934 XATTR_MAC_OSX_PREFIX_LEN + 1] = {0};
935 size_t len = strlen(name);
937 if (!strcmp(name, ""))
940 if (len > HFSPLUS_ATTR_MAX_STRLEN)
943 strcpy(xattr_name, XATTR_MAC_OSX_PREFIX);
944 strcpy(xattr_name + XATTR_MAC_OSX_PREFIX_LEN, name);
946 return hfsplus_setxattr(dentry, xattr_name, buffer, size, flags);
949 static size_t hfsplus_osx_listxattr(struct dentry *dentry, char *list,
950 size_t list_size, const char *name, size_t name_len, int type)
953 * This method is not used.
954 * It is used hfsplus_listxattr() instead of generic_listxattr().
959 const struct xattr_handler hfsplus_xattr_osx_handler = {
960 .prefix = XATTR_MAC_OSX_PREFIX,
961 .list = hfsplus_osx_listxattr,
962 .get = hfsplus_osx_getxattr,
963 .set = hfsplus_osx_setxattr,