fs/ntfs3/attrlist.c

19 static inline bool al_is_valid_le(const struct ntfs_inode *ni,
22 	if (!le || !ni->attr_list.le || !ni->attr_list.size)
25 	return PtrOffset(ni->attr_list.le, le) + le16_to_cpu(le->size) <=
26 	       ni->attr_list.size;
29 void al_destroy(struct ntfs_inode *ni)
31 	run_close(&ni->attr_list.run);
32 	kvfree(ni->attr_list.le);
33 	ni->attr_list.le = NULL;
34 	ni->attr_list.size = 0;
35 	ni->attr_list.dirty = false;
44 int ntfs_load_attr_list(struct ntfs_inode *ni, struct ATTRIB *attr)
50 	if (ni->attr_list.size)
70 		run_init(&ni->attr_list.run);
77 		err = run_unpack_ex(&ni->attr_list.run, ni->mi.sbi, ni->mi.rno,
100 		err = ntfs_read_run_nb(ni->mi.sbi, &ni->attr_list.run, 0, le,
106 	ni->attr_list.size = lsize;
107 	ni->attr_list.le = le;
112 	ni->attr_list.le = le;
113 	al_destroy(ni);
125 struct ATTR_LIST_ENTRY *al_enumerate(struct ntfs_inode *ni,
133 		le = ni->attr_list.le;
144 	off = PtrOffset(ni->attr_list.le, le);
145 	if (off + le_min_size > ni->attr_list.size) {
153 	if (sz < le_min_size || off + sz > ni->attr_list.size ||
168 struct ATTR_LIST_ENTRY *al_find_le(struct ntfs_inode *ni,
174 	return al_find_ex(ni, le, attr->type, attr_name(attr), attr->name_len,
185 struct ATTR_LIST_ENTRY *al_find_ex(struct ntfs_inode *ni,
193 	while ((le = al_enumerate(ni, le))) {
213 					      name_len, ni->mi.sbi->upcase,
242 static struct ATTR_LIST_ENTRY *al_find_le_to_insert(struct ntfs_inode *ni,
251 	while ((le = al_enumerate(ni, prev = le))) {
265 					      name_len, ni->mi.sbi->upcase,
278 	return prev ? Add2Ptr(prev, le16_to_cpu(prev->size)) : ni->attr_list.le;
286 int al_add_le(struct ntfs_inode *ni, enum ATTR_TYPE type, const __le16 *name,
297 	typeof(ni->attr_list) *al = &ni->attr_list;
309 	le = al_find_le_to_insert(ni, type, name, name_len, svcn);
339 	err = attr_set_size(ni, ATTR_LIST, NULL, 0, &al->run, new_size,
351 		err = ntfs_sb_write_run(ni->mi.sbi, &al->run, 0, al->le,
364 bool al_remove_le(struct ntfs_inode *ni, struct ATTR_LIST_ENTRY *le)
368 	typeof(ni->attr_list) *al = &ni->attr_list;
370 	if (!al_is_valid_le(ni, le))
388 bool al_delete_le(struct ntfs_inode *ni, enum ATTR_TYPE type, CLST vcn,
394 	typeof(ni->attr_list) *al = &ni->attr_list;
397 	le = al_find_ex(ni, NULL, type, name, name_len, &vcn);
411 				       ni->mi.sbi->upcase, true))
438 int al_update(struct ntfs_inode *ni, int sync)
442 	typeof(ni->attr_list) *al = &ni->attr_list;
451 	err = attr_set_size(ni, ATTR_LIST, NULL, 0, &al->run, al->size, NULL,
459 		err = ntfs_sb_write_run(ni->mi.sbi, &al->run, 0, al->le,
467 	ni->mi.dirty = true;