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Fri, 14 Aug 2020 12:18:10 -0400 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-58-GBcrWMuKP5mavZ544X16Wg-1; Fri, 14 Aug 2020 17:18:05 +0100 X-MC-Unique: GBcrWMuKP5mavZ544X16Wg-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) by AcuMS.aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Fri, 14 Aug 2020 17:18:05 +0100 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Fri, 14 Aug 2020 17:18:05 +0100 From: David Laight To: "'linux-sctp@vger.kernel.org'" , 'Neil Horman' , "'kent.overstreet@gmail.com'" , Andrew Morton CC: "'netdev@vger.kernel.org'" Subject: RE: sctp: num_ostreams and max_instreams negotiation Thread-Topic: sctp: num_ostreams and max_instreams negotiation Thread-Index: AdZyPjABix+HSvLeTmG2b9Vg1HRq1AAFgglg Date: Fri, 14 Aug 2020 16:18:05 +0000 Message-ID: <868bd24b536345e6a5596f856a0ebe90@AcuMS.aculab.com> References: <9a1bfa6085854387bf98b6171c879b37@AcuMS.aculab.com> In-Reply-To: <9a1bfa6085854387bf98b6171c879b37@AcuMS.aculab.com> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com X-Mimecast-Spam-Score: 0.002 X-Mimecast-Originator: aculab.com Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org PiA+ID4gQXQgc29tZSBwb2ludCB0aGUgbmVnb3RpYXRpb24gb2YgdGhlIG51bWJlciBvZiBTQ1RQ IHN0cmVhbXMNCj4gPiA+IHNlZW1zIHRvIGhhdmUgZ290IGJyb2tlbi4NCj4gPiA+IEkndmUgZGVm aW5pdGVseSB0ZXN0ZWQgaXQgaW4gdGhlIHBhc3QgKHByb2JhYmx5IDEwIHllYXJzIGFnbyEpDQo+ ID4gPiBidXQgb24gYSA1LjguMCBrZXJuZWwgZ2V0c29ja29wdChTQ1RQX0lORk8pIHNlZW1zIHRv IGJlDQo+ID4gPiByZXR1cm5pbmcgdGhlICdudW1fb3N0cmVhbXMnIHNldCBieSBzZXRzb2Nrb3B0 KFNDVFBfSU5JVCkNCj4gPiA+IHJhdGhlciB0aGFuIHRoZSBzbWFsbGVyIG9mIHRoYXQgdmFsdWUg YW5kIHRoYXQgY29uZmlndXJlZA0KPiA+ID4gYXQgdGhlIG90aGVyIGVuZCBvZiB0aGUgY29ubmVj dGlvbi4NCj4gPiA+DQo+ID4gPiBJJ2xsIGRvIGEgYml0IG9mIGRpZ2dpbmcuDQo+ID4NCj4gPiBJ IGNhbid0IGZpbmQgdGhlIGNvZGUgdGhhdCBwcm9jZXNzZXMgdGhlIGluaXRfYWNrLg0KPiA+IEJ1 dCB3aGVuIHNjdHBfcHJvY3NzX2ludCgpIHNhdmVzIHRoZSBzbWFsbGVyIHZhbHVlDQo+ID4gaW4g YXNvYy0+Yy5zaW5pbnRfbWF4X29zdHJlYW1zLg0KPiA+DQo+ID4gQnV0IGFmZTg5OTk2MmVlMDc5 IChpZiBJJ3ZlIHR5cGVkIGl0IHJpZ2h0KSBjaGFuZ2VkDQo+ID4gdGhlIHZhbHVlcyBTQ1RQX0lO Rk8gcmVwb3J0ZWQuDQo+ID4gQXBwYXJhbnRseSBhZGRpbmcgJ3NjdHAgcmVjb25maWcnIGhhZCBj aGFuZ2VkIHRoaW5ncy4NCj4gPg0KPiA+IFNvIEkgc3VzcGVjdCB0aGlzIGhhcyBhbGwgYmVlbiBi cm9rZW4gZm9yIG92ZXIgMyB5ZWFycy4NCj4gDQo+IEl0IGxvb2tzIGxpa2UgdGhlIGNoYW5nZXMg dGhhdCBicm9rZSBpdCB3ZW50IGludG8gNC4xMS4NCj4gSSd2ZSBqdXN0IGNoZWNrZWQgYSAzLjgg a2VybmVsIGFuZCB0aGF0IG5lZ290aWF0ZXMgdGhlDQo+IHZhbHVlcyBkb3duIGluIGJvdGggZGly ZWN0aW9ucy4NCj4gDQo+IEkgZG9uJ3QgaGF2ZSBhbnkga2VybmVscyBsdXJraW5nIGJldHdlZW4g My44IGFuZCA0LjE1Lg0KPiAoWWVzLCBJIGNvdWxkIGJ1aWxkIG9uZSwgYnV0IGl0IGRvZXNuJ3Qg cmVhbGx5IGhlbHAuKQ0KDQpPaywgYnVnIGxvY2F0ZWQgLSBwcmV0dHkgb2J2aW91cyByZWFsbHku DQpuZXQvc2N0cC9zdHJlYW0uIGhhcyB0aGUgZm9sbG93aW5nIGNvZGU6DQoNCnN0YXRpYyBpbnQg c2N0cF9zdHJlYW1fYWxsb2Nfb3V0KHN0cnVjdCBzY3RwX3N0cmVhbSAqc3RyZWFtLCBfX3UxNiBv dXRjbnQsDQoJCQkJIGdmcF90IGdmcCkNCnsNCglpbnQgcmV0Ow0KDQoJaWYgKG91dGNudCA8PSBz dHJlYW0tPm91dGNudCkNCgkJcmV0dXJuIDA7DQoNCglyZXQgPSBnZW5yYWRpeF9wcmVhbGxvYygm c3RyZWFtLT5vdXQsIG91dGNudCwgZ2ZwKTsNCglpZiAocmV0KQ0KCQlyZXR1cm4gcmV0Ow0KDQoJ c3RyZWFtLT5vdXRjbnQgPSBvdXRjbnQ7DQoJcmV0dXJuIDA7DQp9DQoNCnNjdHBfc3RyZWFtX2Fs bG9jX2luKCkgaXMgdGhlIHNhbWUuDQoNClRoaXMgaXMgY2FsbGVkIHRvIHJlZHVjZSB0aGUgbnVt YmVyIG9mIHN0cmVhbXMuDQpCdXQgaW4gdGhhdCBjYXNlIGl0IGRvZXMgbm90aGluZyBhdCBhbGwu DQoNCldoaWNoIG1lYW5zIHRoYXQgdGhlICdjb252ZXJ0IHRvIGdlbnJhZGl4JyBjaGFuZ2UgYnJv a2UgaXQuDQpUYWcgMjA3NWU1MGNhZjVlYS4NCg0KSSBkb24ndCBrbm93IHdoYXQgJ2dlbnJhZGl4 JyBhcnJheXMgb3IgdGhlIGVhcmxpZXIgJ2ZsZXhfYXJyYXknDQphY3R1YWxseSBsb29rIGxpa2Uu DQpCdXQgaWYgJ2dlbnJhZGl4JyBpcyBzb21lIGtpbmQgb2YgcmFkaXgtdHJlZSBpdCBpcyBwcm9i YWJseSB0aGUNCndyb25nIGJlYXN0IGZvciBTQ1RQIHN0cmVhbXMuDQpMb3RzIG9mIGNvZGUgbG9v cHMgdGhyb3VnaCBhbGwgb2YgdGhlbS4NCg0KVGhpcyBkb2VzIG1lYW4gdGhhdCBpdCBoYXMgb25s eSBiZWVuIGJyb2tlbiBzaW5jZSB0aGUgNS4xDQptZXJnZSB3aW5kb3cuDQoNCldoaWxlIGp1c3Qg YXNzaWduaW5nIHRvIHN0cmVhbS0+b3V0Y250IHdoZW4gdGhlIHZhbHVlDQppcyByZWR1Y2VkIHdp bGwgZml4IHRoZSBuZWdvdGlhdGlvbiwgSSd2ZSBubyBpZGVhDQp3aGF0IHNpZGUtZWZmZWN0cyB0 aGF0IGhhcy4NCg0KCURhdmlkDQoNCg0KCURhdmlkDQoNCi0NClJlZ2lzdGVyZWQgQWRkcmVzcyBM YWtlc2lkZSwgQnJhbWxleSBSb2FkLCBNb3VudCBGYXJtLCBNaWx0b24gS2V5bmVzLCBNSzEgMVBU LCBVSw0KUmVnaXN0cmF0aW9uIE5vOiAxMzk3Mzg2IChXYWxlcykNCg==