268 	if (t->pl.probe_count < SCTP_MAX_PROBES)  in sctp_transport_pl_send()
271 	t->pl.probe_count = 0;  in sctp_transport_pl_send()
272 	if (t->pl.state == SCTP_PL_BASE) {  in sctp_transport_pl_send()
273 		if (t->pl.probe_size == SCTP_BASE_PLPMTU) { /* BASE_PLPMTU Confirmation Failed */  in sctp_transport_pl_send()
274 			t->pl.state = SCTP_PL_ERROR; /* Base -> Error */  in sctp_transport_pl_send()
276 			t->pl.pmtu = SCTP_BASE_PLPMTU;  in sctp_transport_pl_send()
277 			t->pathmtu = t->pl.pmtu + sctp_transport_pl_hlen(t);  in sctp_transport_pl_send()
280 	} else if (t->pl.state == SCTP_PL_SEARCH) {  in sctp_transport_pl_send()
281 		if (t->pl.pmtu == t->pl.probe_size) { /* Black Hole Detected */  in sctp_transport_pl_send()
282 			t->pl.state = SCTP_PL_BASE;  /* Search -> Base */  in sctp_transport_pl_send()
283 			t->pl.probe_size = SCTP_BASE_PLPMTU;  in sctp_transport_pl_send()
284 			t->pl.probe_high = 0;  in sctp_transport_pl_send()
286 			t->pl.pmtu = SCTP_BASE_PLPMTU;  in sctp_transport_pl_send()
287 			t->pathmtu = t->pl.pmtu + sctp_transport_pl_hlen(t);  in sctp_transport_pl_send()
290 			t->pl.probe_high = t->pl.probe_size;  in sctp_transport_pl_send()
291 			t->pl.probe_size = t->pl.pmtu;  in sctp_transport_pl_send()
293 	} else if (t->pl.state == SCTP_PL_COMPLETE) {  in sctp_transport_pl_send()
294 		if (t->pl.pmtu == t->pl.probe_size) { /* Black Hole Detected */  in sctp_transport_pl_send()
295 			t->pl.state = SCTP_PL_BASE;  /* Search Complete -> Base */  in sctp_transport_pl_send()
296 			t->pl.probe_size = SCTP_BASE_PLPMTU;  in sctp_transport_pl_send()
298 			t->pl.pmtu = SCTP_BASE_PLPMTU;  in sctp_transport_pl_send()
299 			t->pathmtu = t->pl.pmtu + sctp_transport_pl_hlen(t);  in sctp_transport_pl_send()
306 		 __func__, t, t->pl.state, t->pl.pmtu, t->pl.probe_size, t->pl.probe_high);  in sctp_transport_pl_send()
307 	t->pl.probe_count++;  in sctp_transport_pl_send()
313 		 __func__, t, t->pl.state, t->pl.pmtu, t->pl.probe_size, t->pl.probe_high);  in sctp_transport_pl_recv()
315 	t->pl.pmtu = t->pl.probe_size;  in sctp_transport_pl_recv()
316 	t->pl.probe_count = 0;  in sctp_transport_pl_recv()
317 	if (t->pl.state == SCTP_PL_BASE) {  in sctp_transport_pl_recv()
318 		t->pl.state = SCTP_PL_SEARCH; /* Base -> Search */  in sctp_transport_pl_recv()
319 		t->pl.probe_size += SCTP_PL_BIG_STEP;  in sctp_transport_pl_recv()
320 	} else if (t->pl.state == SCTP_PL_ERROR) {  in sctp_transport_pl_recv()
321 		t->pl.state = SCTP_PL_SEARCH; /* Error -> Search */  in sctp_transport_pl_recv()
323 		t->pl.pmtu = t->pl.probe_size;  in sctp_transport_pl_recv()
324 		t->pathmtu = t->pl.pmtu + sctp_transport_pl_hlen(t);  in sctp_transport_pl_recv()
326 		t->pl.probe_size += SCTP_PL_BIG_STEP;  in sctp_transport_pl_recv()
327 	} else if (t->pl.state == SCTP_PL_SEARCH) {  in sctp_transport_pl_recv()
328 		if (!t->pl.probe_high) {  in sctp_transport_pl_recv()
329 			t->pl.probe_size = min(t->pl.probe_size + SCTP_PL_BIG_STEP,  in sctp_transport_pl_recv()
333 		t->pl.probe_size += SCTP_PL_MIN_STEP;  in sctp_transport_pl_recv()
334 		if (t->pl.probe_size >= t->pl.probe_high) {  in sctp_transport_pl_recv()
335 			t->pl.probe_high = 0;  in sctp_transport_pl_recv()
336 			t->pl.state = SCTP_PL_COMPLETE; /* Search -> Search Complete */  in sctp_transport_pl_recv()
338 			t->pl.probe_size = t->pl.pmtu;  in sctp_transport_pl_recv()
339 			t->pathmtu = t->pl.pmtu + sctp_transport_pl_hlen(t);  in sctp_transport_pl_recv()
343 	} else if (t->pl.state == SCTP_PL_COMPLETE) {  in sctp_transport_pl_recv()
345 		t->pl.state = SCTP_PL_SEARCH; /* Search Complete -> Search */  in sctp_transport_pl_recv()
346 		t->pl.probe_size += SCTP_PL_MIN_STEP;  in sctp_transport_pl_recv()
349 	return t->pl.state == SCTP_PL_COMPLETE;  in sctp_transport_pl_recv()
355 		 __func__, t, t->pl.state, t->pl.pmtu, t->pl.probe_size, pmtu);  in sctp_transport_pl_toobig()
357 	if (pmtu < SCTP_MIN_PLPMTU || pmtu >= t->pl.probe_size)  in sctp_transport_pl_toobig()
360 	if (t->pl.state == SCTP_PL_BASE) {  in sctp_transport_pl_toobig()
362 			t->pl.state = SCTP_PL_ERROR; /* Base -> Error */  in sctp_transport_pl_toobig()
364 			t->pl.pmtu = SCTP_BASE_PLPMTU;  in sctp_transport_pl_toobig()
365 			t->pathmtu = t->pl.pmtu + sctp_transport_pl_hlen(t);  in sctp_transport_pl_toobig()
368 	} else if (t->pl.state == SCTP_PL_SEARCH) {  in sctp_transport_pl_toobig()
369 		if (pmtu >= SCTP_BASE_PLPMTU && pmtu < t->pl.pmtu) {  in sctp_transport_pl_toobig()
370 			t->pl.state = SCTP_PL_BASE;  /* Search -> Base */  in sctp_transport_pl_toobig()
371 			t->pl.probe_size = SCTP_BASE_PLPMTU;  in sctp_transport_pl_toobig()
372 			t->pl.probe_count = 0;  in sctp_transport_pl_toobig()
374 			t->pl.probe_high = 0;  in sctp_transport_pl_toobig()
375 			t->pl.pmtu = SCTP_BASE_PLPMTU;  in sctp_transport_pl_toobig()
376 			t->pathmtu = t->pl.pmtu + sctp_transport_pl_hlen(t);  in sctp_transport_pl_toobig()
378 		} else if (pmtu > t->pl.pmtu && pmtu < t->pl.probe_size) {  in sctp_transport_pl_toobig()
379 			t->pl.probe_size = pmtu;  in sctp_transport_pl_toobig()
380 			t->pl.probe_count = 0;  in sctp_transport_pl_toobig()
382 	} else if (t->pl.state == SCTP_PL_COMPLETE) {  in sctp_transport_pl_toobig()
383 		if (pmtu >= SCTP_BASE_PLPMTU && pmtu < t->pl.pmtu) {  in sctp_transport_pl_toobig()
384 			t->pl.state = SCTP_PL_BASE;  /* Complete -> Base */  in sctp_transport_pl_toobig()
385 			t->pl.probe_size = SCTP_BASE_PLPMTU;  in sctp_transport_pl_toobig()
386 			t->pl.probe_count = 0;  in sctp_transport_pl_toobig()
388 			t->pl.probe_high = 0;  in sctp_transport_pl_toobig()
389 			t->pl.pmtu = SCTP_BASE_PLPMTU;  in sctp_transport_pl_toobig()
390 			t->pathmtu = t->pl.pmtu + sctp_transport_pl_hlen(t);  in sctp_transport_pl_toobig()