+static int yaffs_do_xattrib_fetch(struct yaffs_obj *obj, const YCHAR * name,
+ void *value, int size)
+{
+ char *buffer = NULL;
+ int result;
+ struct yaffs_ext_tags tags;
+ struct yaffs_dev *dev = obj->my_dev;
+ int x_offs = sizeof(struct yaffs_obj_hdr);
+ int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr);
+
+ char *x_buffer;
+
+ int retval = 0;
+
+ if (obj->hdr_chunk < 1)
+ return -ENODATA;
+
+ /* If we know that the object has no xattribs then don't do all the
+ * reading and parsing.
+ */
+ if (obj->xattr_known && !obj->has_xattr) {
+ if (name)
+ return -ENODATA;
+ else
+ return 0;
+ }
+
+ buffer = (char *)yaffs_get_temp_buffer(dev, __LINE__);
+ if (!buffer)
+ return -ENOMEM;
+
+ result =
+ yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, (u8 *) buffer, &tags);
+
+ if (result != YAFFS_OK)
+ retval = -ENOENT;
+ else {
+ x_buffer = buffer + x_offs;
+
+ if (!obj->xattr_known) {
+ obj->has_xattr = nval_hasvalues(x_buffer, x_size);
+ obj->xattr_known = 1;
+ }
+
+ if (name)
+ retval = nval_get(x_buffer, x_size, name, value, size);
+ else
+ retval = nval_list(x_buffer, x_size, value, size);
+ }
+ yaffs_release_temp_buffer(dev, (u8 *) buffer, __LINE__);
+ return retval;
+}
+
+int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR * name,
+ const void *value, int size, int flags)
+{
+ return yaffs_do_xattrib_mod(obj, 1, name, value, size, flags);
+}
+
+int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR * name)
+{
+ return yaffs_do_xattrib_mod(obj, 0, name, NULL, 0, 0);
+}
+
+int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR * name, void *value,
+ int size)
+{
+ return yaffs_do_xattrib_fetch(obj, name, value, size);
+}
+
+int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size)
+{
+ return yaffs_do_xattrib_fetch(obj, NULL, buffer, size);
+}
+
+static void yaffs_check_obj_details_loaded(struct yaffs_obj *in)
+{
+ u8 *chunk_data;
+ struct yaffs_obj_hdr *oh;
+ struct yaffs_dev *dev;
+ struct yaffs_ext_tags tags;
+ int result;
+ int alloc_failed = 0;
+
+ if (!in)
+ return;
+
+ dev = in->my_dev;
+
+ if (in->lazy_loaded && in->hdr_chunk > 0) {
+ in->lazy_loaded = 0;
+ chunk_data = yaffs_get_temp_buffer(dev, __LINE__);
+
+ result =
+ yaffs_rd_chunk_tags_nand(dev, in->hdr_chunk, chunk_data,
+ &tags);
+ oh = (struct yaffs_obj_hdr *)chunk_data;
+
+ in->yst_mode = oh->yst_mode;
+ yaffs_load_attribs(in, oh);
+ yaffs_set_obj_name_from_oh(in, oh);
+
+ if (in->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) {
+ in->variant.symlink_variant.alias =
+ yaffs_clone_str(oh->alias);
+ if (!in->variant.symlink_variant.alias)
+ alloc_failed = 1; /* Not returned to caller */
+ }
+
+ yaffs_release_temp_buffer(dev, chunk_data, __LINE__);
+ }
+}
+
+static void yaffs_load_name_from_oh(struct yaffs_dev *dev, YCHAR * name,
+ const YCHAR * oh_name, int buff_size)
+{
+#ifdef CONFIG_YAFFS_AUTO_UNICODE
+ if (dev->param.auto_unicode) {
+ if (*oh_name) {
+ /* It is an ASCII name, do an ASCII to
+ * unicode conversion */
+ const char *ascii_oh_name = (const char *)oh_name;
+ int n = buff_size - 1;
+ while (n > 0 && *ascii_oh_name) {
+ *name = *ascii_oh_name;
+ name++;
+ ascii_oh_name++;
+ n--;
+ }
+ } else {
+ strncpy(name, oh_name + 1, buff_size - 1);
+ }
+ } else {
+#else
+ {
+#endif
+ strncpy(name, oh_name, buff_size - 1);
+ }
+}
+
+static void yaffs_load_oh_from_name(struct yaffs_dev *dev, YCHAR * oh_name,
+ const YCHAR * name)
+{
+#ifdef CONFIG_YAFFS_AUTO_UNICODE
+
+ int is_ascii;
+ YCHAR *w;
+
+ if (dev->param.auto_unicode) {
+
+ is_ascii = 1;
+ w = name;
+
+ /* Figure out if the name will fit in ascii character set */
+ while (is_ascii && *w) {
+ if ((*w) & 0xff00)
+ is_ascii = 0;
+ w++;
+ }
+
+ if (is_ascii) {
+ /* It is an ASCII name, so do a unicode to ascii conversion */
+ char *ascii_oh_name = (char *)oh_name;
+ int n = YAFFS_MAX_NAME_LENGTH - 1;
+ while (n > 0 && *name) {
+ *ascii_oh_name = *name;
+ name++;
+ ascii_oh_name++;
+ n--;
+ }
+ } else {
+ /* It is a unicode name, so save starting at the second YCHAR */
+ *oh_name = 0;
+ strncpy(oh_name + 1, name,
+ YAFFS_MAX_NAME_LENGTH - 2);
+ }
+ } else {
+#else
+ {
+#endif
+ strncpy(oh_name, name, YAFFS_MAX_NAME_LENGTH - 1);
+ }
+
+}
+
+/* UpdateObjectHeader updates the header on NAND for an object.
+ * If name is not NULL, then that new name is used.
+ */
+int yaffs_update_oh(struct yaffs_obj *in, const YCHAR * name, int force,
+ int is_shrink, int shadows, struct yaffs_xattr_mod *xmod)
+{
+
+ struct yaffs_block_info *bi;
+
+ struct yaffs_dev *dev = in->my_dev;
+
+ int prev_chunk_id;
+ int ret_val = 0;
+ int result = 0;
+
+ int new_chunk_id;
+ struct yaffs_ext_tags new_tags;
+ struct yaffs_ext_tags old_tags;
+ const YCHAR *alias = NULL;
+
+ u8 *buffer = NULL;
+ YCHAR old_name[YAFFS_MAX_NAME_LENGTH + 1];
+
+ struct yaffs_obj_hdr *oh = NULL;
+
+ strcpy(old_name, _Y("silly old name"));
+
+ if (!in->fake || in == dev->root_dir ||
+ force || xmod) {
+
+ yaffs_check_gc(dev, 0);
+ yaffs_check_obj_details_loaded(in);
+
+ buffer = yaffs_get_temp_buffer(in->my_dev, __LINE__);
+ oh = (struct yaffs_obj_hdr *)buffer;
+
+ prev_chunk_id = in->hdr_chunk;
+
+ if (prev_chunk_id > 0) {
+ result = yaffs_rd_chunk_tags_nand(dev, prev_chunk_id,
+ buffer, &old_tags);
+
+ yaffs_verify_oh(in, oh, &old_tags, 0);
+
+ memcpy(old_name, oh->name, sizeof(oh->name));
+ memset(buffer, 0xFF, sizeof(struct yaffs_obj_hdr));
+ } else {
+ memset(buffer, 0xFF, dev->data_bytes_per_chunk);
+ }