392 static enum netfs_io_source cachefiles_prepare_read(struct netfs_io_subrequest *subreq,  in cachefiles_prepare_read()  argument
396 	struct netfs_io_request *rreq = subreq->rreq;  in cachefiles_prepare_read()
408 	_enter("%zx @%llx/%llx", subreq->len, subreq->start, i_size);  in cachefiles_prepare_read()
410 	if (subreq->start >= i_size) {  in cachefiles_prepare_read()
417 		__set_bit(NETFS_SREQ_COPY_TO_CACHE, &subreq->flags);  in cachefiles_prepare_read()
419 		if (!test_bit(NETFS_SREQ_ONDEMAND, &subreq->flags))  in cachefiles_prepare_read()
440 		off = vfs_llseek(file, subreq->start, SEEK_DATA);  in cachefiles_prepare_read()
452 	if (off >= subreq->start + subreq->len) {  in cachefiles_prepare_read()
457 	if (off > subreq->start) {  in cachefiles_prepare_read()
459 		subreq->len = off - subreq->start;  in cachefiles_prepare_read()
466 		to = vfs_llseek(file, subreq->start, SEEK_HOLE);  in cachefiles_prepare_read()
474 	if (to < subreq->start + subreq->len) {  in cachefiles_prepare_read()
475 		if (subreq->start + subreq->len >= i_size)  in cachefiles_prepare_read()
479 		subreq->len = to - subreq->start;  in cachefiles_prepare_read()
487 	__set_bit(NETFS_SREQ_COPY_TO_CACHE, &subreq->flags);  in cachefiles_prepare_read()
488 	if (test_bit(NETFS_SREQ_ONDEMAND, &subreq->flags)) {  in cachefiles_prepare_read()
489 		rc = cachefiles_ondemand_read(object, subreq->start,  in cachefiles_prepare_read()
490 					      subreq->len);  in cachefiles_prepare_read()
492 			__clear_bit(NETFS_SREQ_ONDEMAND, &subreq->flags);  in cachefiles_prepare_read()
500 	trace_cachefiles_prep_read(subreq, ret, why, ino);  in cachefiles_prepare_read()