Lines Matching defs:data_tail
205 unsigned long data_head, data_tail;
218 data_tail = metadata_page->data_tail;
227 * the data_tail to know the last read data.
232 if (data_head - data_tail < sizeof(header))
235 data_tail += sizeof(header);
239 return sample_buff + page_size + data_tail;
240 data_tail += *size;
244 if ((metadata_page->data_tail + *size) > metadata_page->data_head)
245 data_tail = metadata_page->data_head;
247 data_tail += *size;