266 	if (t->pl.probe_count < SCTP_MAX_PROBES)  in sctp_transport_pl_send()
269 	t->pl.probe_count = 0;  in sctp_transport_pl_send()
270 	if (t->pl.state == SCTP_PL_BASE) {  in sctp_transport_pl_send()
271 		if (t->pl.probe_size == SCTP_BASE_PLPMTU) { /* BASE_PLPMTU Confirmation Failed */  in sctp_transport_pl_send()
272 			t->pl.state = SCTP_PL_ERROR; /* Base -> Error */  in sctp_transport_pl_send()
274 			t->pl.pmtu = SCTP_BASE_PLPMTU;  in sctp_transport_pl_send()
275 			t->pathmtu = t->pl.pmtu + sctp_transport_pl_hlen(t);  in sctp_transport_pl_send()
278 	} else if (t->pl.state == SCTP_PL_SEARCH) {  in sctp_transport_pl_send()
279 		if (t->pl.pmtu == t->pl.probe_size) { /* Black Hole Detected */  in sctp_transport_pl_send()
280 			t->pl.state = SCTP_PL_BASE;  /* Search -> Base */  in sctp_transport_pl_send()
281 			t->pl.probe_size = SCTP_BASE_PLPMTU;  in sctp_transport_pl_send()
282 			t->pl.probe_high = 0;  in sctp_transport_pl_send()
284 			t->pl.pmtu = SCTP_BASE_PLPMTU;  in sctp_transport_pl_send()
285 			t->pathmtu = t->pl.pmtu + sctp_transport_pl_hlen(t);  in sctp_transport_pl_send()
288 			t->pl.probe_high = t->pl.probe_size;  in sctp_transport_pl_send()
289 			t->pl.probe_size = t->pl.pmtu;  in sctp_transport_pl_send()
291 	} else if (t->pl.state == SCTP_PL_COMPLETE) {  in sctp_transport_pl_send()
292 		if (t->pl.pmtu == t->pl.probe_size) { /* Black Hole Detected */  in sctp_transport_pl_send()
293 			t->pl.state = SCTP_PL_BASE;  /* Search Complete -> Base */  in sctp_transport_pl_send()
294 			t->pl.probe_size = SCTP_BASE_PLPMTU;  in sctp_transport_pl_send()
296 			t->pl.pmtu = SCTP_BASE_PLPMTU;  in sctp_transport_pl_send()
297 			t->pathmtu = t->pl.pmtu + sctp_transport_pl_hlen(t);  in sctp_transport_pl_send()
304 		 __func__, t, t->pl.state, t->pl.pmtu, t->pl.probe_size, t->pl.probe_high);  in sctp_transport_pl_send()
305 	t->pl.probe_count++;  in sctp_transport_pl_send()
311 		 __func__, t, t->pl.state, t->pl.pmtu, t->pl.probe_size, t->pl.probe_high);  in sctp_transport_pl_recv()
313 	t->pl.pmtu = t->pl.probe_size;  in sctp_transport_pl_recv()
314 	t->pl.probe_count = 0;  in sctp_transport_pl_recv()
315 	if (t->pl.state == SCTP_PL_BASE) {  in sctp_transport_pl_recv()
316 		t->pl.state = SCTP_PL_SEARCH; /* Base -> Search */  in sctp_transport_pl_recv()
317 		t->pl.probe_size += SCTP_PL_BIG_STEP;  in sctp_transport_pl_recv()
318 	} else if (t->pl.state == SCTP_PL_ERROR) {  in sctp_transport_pl_recv()
319 		t->pl.state = SCTP_PL_SEARCH; /* Error -> Search */  in sctp_transport_pl_recv()
321 		t->pl.pmtu = t->pl.probe_size;  in sctp_transport_pl_recv()
322 		t->pathmtu = t->pl.pmtu + sctp_transport_pl_hlen(t);  in sctp_transport_pl_recv()
324 		t->pl.probe_size += SCTP_PL_BIG_STEP;  in sctp_transport_pl_recv()
325 	} else if (t->pl.state == SCTP_PL_SEARCH) {  in sctp_transport_pl_recv()
326 		if (!t->pl.probe_high) {  in sctp_transport_pl_recv()
327 			if (t->pl.probe_size < SCTP_MAX_PLPMTU) {  in sctp_transport_pl_recv()
328 				t->pl.probe_size = min(t->pl.probe_size + SCTP_PL_BIG_STEP,  in sctp_transport_pl_recv()
332 			t->pl.probe_high = SCTP_MAX_PLPMTU;  in sctp_transport_pl_recv()
334 		t->pl.probe_size += SCTP_PL_MIN_STEP;  in sctp_transport_pl_recv()
335 		if (t->pl.probe_size >= t->pl.probe_high) {  in sctp_transport_pl_recv()
336 			t->pl.probe_high = 0;  in sctp_transport_pl_recv()
337 			t->pl.state = SCTP_PL_COMPLETE; /* Search -> Search Complete */  in sctp_transport_pl_recv()
339 			t->pl.probe_size = t->pl.pmtu;  in sctp_transport_pl_recv()
340 			t->pathmtu = t->pl.pmtu + sctp_transport_pl_hlen(t);  in sctp_transport_pl_recv()
344 	} else if (t->pl.state == SCTP_PL_COMPLETE) {  in sctp_transport_pl_recv()
346 		t->pl.state = SCTP_PL_SEARCH; /* Search Complete -> Search */  in sctp_transport_pl_recv()
347 		t->pl.probe_size = min(t->pl.probe_size + SCTP_PL_MIN_STEP, SCTP_MAX_PLPMTU);  in sctp_transport_pl_recv()
350 	return t->pl.state == SCTP_PL_COMPLETE;  in sctp_transport_pl_recv()
356 		 __func__, t, t->pl.state, t->pl.pmtu, t->pl.probe_size, pmtu);  in sctp_transport_pl_toobig()
358 	if (pmtu < SCTP_MIN_PLPMTU || pmtu >= t->pl.probe_size)  in sctp_transport_pl_toobig()
361 	if (t->pl.state == SCTP_PL_BASE) {  in sctp_transport_pl_toobig()
363 			t->pl.state = SCTP_PL_ERROR; /* Base -> Error */  in sctp_transport_pl_toobig()
365 			t->pl.pmtu = SCTP_BASE_PLPMTU;  in sctp_transport_pl_toobig()
366 			t->pathmtu = t->pl.pmtu + sctp_transport_pl_hlen(t);  in sctp_transport_pl_toobig()
369 	} else if (t->pl.state == SCTP_PL_SEARCH) {  in sctp_transport_pl_toobig()
370 		if (pmtu >= SCTP_BASE_PLPMTU && pmtu < t->pl.pmtu) {  in sctp_transport_pl_toobig()
371 			t->pl.state = SCTP_PL_BASE;  /* Search -> Base */  in sctp_transport_pl_toobig()
372 			t->pl.probe_size = SCTP_BASE_PLPMTU;  in sctp_transport_pl_toobig()
373 			t->pl.probe_count = 0;  in sctp_transport_pl_toobig()
375 			t->pl.probe_high = 0;  in sctp_transport_pl_toobig()
376 			t->pl.pmtu = SCTP_BASE_PLPMTU;  in sctp_transport_pl_toobig()
377 			t->pathmtu = t->pl.pmtu + sctp_transport_pl_hlen(t);  in sctp_transport_pl_toobig()
379 		} else if (pmtu > t->pl.pmtu && pmtu < t->pl.probe_size) {  in sctp_transport_pl_toobig()
380 			t->pl.probe_size = pmtu;  in sctp_transport_pl_toobig()
381 			t->pl.probe_count = 0;  in sctp_transport_pl_toobig()
383 	} else if (t->pl.state == SCTP_PL_COMPLETE) {  in sctp_transport_pl_toobig()
384 		if (pmtu >= SCTP_BASE_PLPMTU && pmtu < t->pl.pmtu) {  in sctp_transport_pl_toobig()
385 			t->pl.state = SCTP_PL_BASE;  /* Complete -> Base */  in sctp_transport_pl_toobig()
386 			t->pl.probe_size = SCTP_BASE_PLPMTU;  in sctp_transport_pl_toobig()
387 			t->pl.probe_count = 0;  in sctp_transport_pl_toobig()
389 			t->pl.probe_high = 0;  in sctp_transport_pl_toobig()
390 			t->pl.pmtu = SCTP_BASE_PLPMTU;  in sctp_transport_pl_toobig()
391 			t->pathmtu = t->pl.pmtu + sctp_transport_pl_hlen(t);  in sctp_transport_pl_toobig()