From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: Re: [PATCH] virtio: Work around frames incorrectly marked as gso Date: Thu, 13 Feb 2020 07:44:06 -0800 Message-ID: <94fb9656-99ee-a001-e428-9d76c3620e61@gmail.com> References: <20191209104824.17059-1-anton.ivanov@cambridgegreys.com> <57230228-7030-c65f-a24f-910ca52bbe9e@cambridgegreys.com> <918222d9-816a-be70-f8af-b8dfcb586240@cambridgegreys.com> <20200211053502-mutt-send-email-mst@kernel.org> <9547228b-aa93-f2b6-6fdc-8d33cde3716a@cambridgegreys.com> <20200213045937-mutt-send-email-mst@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <20200213045937-mutt-send-email-mst@kernel.org> Content-Language: en-US List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" To: "Michael S. Tsirkin" , Anton Ivanov Cc: netdev@vger.kernel.org, linux-um@lists.infradead.org, virtualization@lists.linux-foundation.org List-Id: virtualization@lists.linuxfoundation.org CgpPbiAyLzEzLzIwIDI6MDAgQU0sIE1pY2hhZWwgUy4gVHNpcmtpbiB3cm90ZToKPiBPbiBXZWQs IEZlYiAxMiwgMjAyMCBhdCAwNTozODowOVBNICswMDAwLCBBbnRvbiBJdmFub3Ygd3JvdGU6Cj4+ Cj4+Cj4+IE9uIDExLzAyLzIwMjAgMTA6MzcsIE1pY2hhZWwgUy4gVHNpcmtpbiB3cm90ZToKPj4+ IE9uIFR1ZSwgRmViIDExLCAyMDIwIGF0IDA3OjQyOjM3QU0gKzAwMDAsIEFudG9uIEl2YW5vdiB3 cm90ZToKPj4+PiBPbiAxMS8wMi8yMDIwIDAyOjUxLCBKYXNvbiBXYW5nIHdyb3RlOgo+Pj4+Pgo+ Pj4+PiBPbiAyMDIwLzIvMTEg5LiK5Y2IMTI6NTUsIEFudG9uIEl2YW5vdiB3cm90ZToKPj4+Pj4+ Cj4+Pj4+Pgo+Pj4+Pj4gT24gMDkvMTIvMjAxOSAxMDo0OCwgYW50b24uaXZhbm92QGNhbWJyaWRn ZWdyZXlzLmNvbSB3cm90ZToKPj4+Pj4+PiBGcm9tOiBBbnRvbiBJdmFub3YgPGFudG9uLml2YW5v dkBjYW1icmlkZ2VncmV5cy5jb20+Cj4+Pj4+Pj4KPj4+Pj4+PiBTb21lIG9mIHRoZSBmcmFtZXMg bWFya2VkIGFzIEdTTyB3aGljaCBhcnJpdmUgYXQKPj4+Pj4+PiB2aXJ0aW9fbmV0X2hkcl9mcm9t X3NrYigpIGhhdmUgbm8gR1NPX1RZUEUsIG5vCj4+Pj4+Pj4gZnJhZ21lbnRzIChkYXRhX2xlbiA9 IDApIGFuZCBsZW5ndGggc2lnbmlmaWNhbnRseSBzaG9ydGVyCj4+Pj4+Pj4gdGhhbiB0aGUgTVRV ICg3NTIgaW4gbXkgZXhwZXJpbWVudHMpLgo+Pj4+Pj4+Cj4+Pj4+Pj4gVGhpcyBpcyBvYnNlcnZl ZCBvbiByYXcgc29ja2V0cyByZWFkaW5nIG9mZiB2RXRoIGludGVyZmFjZXMKPj4+Pj4+PiBpbiBh bGwgNC54IGFuZCA1Lngga2VybmVscyBJIHRlc3RlZC4KPj4+Pj4+Pgo+Pj4+Pj4+IFRoZXNlIGZy YW1lcyBhcmUgcmVwb3J0ZWQgYXMgaW52YWxpZCB3aGlsZSB0aGV5IGFyZSBpbiBmYWN0Cj4+Pj4+ Pj4gZ3NvLWxlc3MgZnJhbWVzLgo+Pj4+Pj4+Cj4+Pj4+Pj4gVGhpcyBwYXRjaCBtYXJrcyB0aGUg dm5ldCBoZWFkZXIgYXMgbm8tR1NPIGZvciB0aGVtIGluc3RlYWQKPj4+Pj4+PiBvZiByZXBvcnRp bmcgaXQgYXMgaW52YWxpZC4KPj4+Pj4+Pgo+Pj4+Pj4+IFNpZ25lZC1vZmYtYnk6IEFudG9uIEl2 YW5vdiA8YW50b24uaXZhbm92QGNhbWJyaWRnZWdyZXlzLmNvbT4KPj4+Pj4+PiAtLS0KPj4+Pj4+ PiAgwqAgaW5jbHVkZS9saW51eC92aXJ0aW9fbmV0LmggfCA4ICsrKysrKy0tCj4+Pj4+Pj4gIMKg IDEgZmlsZSBjaGFuZ2VkLCA2IGluc2VydGlvbnMoKyksIDIgZGVsZXRpb25zKC0pCj4+Pj4+Pj4K Pj4+Pj4+PiBkaWZmIC0tZ2l0IGEvaW5jbHVkZS9saW51eC92aXJ0aW9fbmV0LmggYi9pbmNsdWRl L2xpbnV4L3ZpcnRpb19uZXQuaAo+Pj4+Pj4+IGluZGV4IDBkMWZlOTI5N2FjNi4uZDkwZDVjZmYx YjlhIDEwMDY0NAo+Pj4+Pj4+IC0tLSBhL2luY2x1ZGUvbGludXgvdmlydGlvX25ldC5oCj4+Pj4+ Pj4gKysrIGIvaW5jbHVkZS9saW51eC92aXJ0aW9fbmV0LmgKPj4+Pj4+PiBAQCAtMTEyLDggKzEx MiwxMiBAQCBzdGF0aWMgaW5saW5lIGludAo+Pj4+Pj4+IHZpcnRpb19uZXRfaGRyX2Zyb21fc2ti KGNvbnN0IHN0cnVjdCBza19idWZmICpza2IsCj4+Pj4+Pj4gIMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgIGhkci0+Z3NvX3R5cGUgPSBWSVJUSU9fTkVUX0hEUl9HU09fVENQVjQ7Cj4+Pj4+Pj4g IMKgwqDCoMKgwqDCoMKgwqDCoCBlbHNlIGlmIChzaW5mby0+Z3NvX3R5cGUgJiBTS0JfR1NPX1RD UFY2KQo+Pj4+Pj4+ICDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCBoZHItPmdzb190eXBlID0g VklSVElPX05FVF9IRFJfR1NPX1RDUFY2Owo+Pj4+Pj4+IC3CoMKgwqDCoMKgwqDCoCBlbHNlCj4+ Pj4+Pj4gLcKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgcmV0dXJuIC1FSU5WQUw7Cj4+Pj4+Pj4gK8Kg wqDCoMKgwqDCoMKgIGVsc2Ugewo+Pj4+Pj4+ICvCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIGlmIChz a2ItPmRhdGFfbGVuID09IDApCj4+Pj4+Pj4gK8KgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oCBoZHItPmdzb190eXBlID0gVklSVElPX05FVF9IRFJfR1NPX05PTkU7Cj4+Pj4+Pj4gK8KgwqDC oMKgwqDCoMKgwqDCoMKgwqAgZWxzZQo+Pj4+Pj4+ICvCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqAgcmV0dXJuIC1FSU5WQUw7Cj4+Pj4+Pj4gK8KgwqDCoMKgwqDCoMKgIH0KPj4+Pj4+PiAg wqDCoMKgwqDCoMKgwqDCoMKgIGlmIChzaW5mby0+Z3NvX3R5cGUgJiBTS0JfR1NPX1RDUF9FQ04p Cj4+Pj4+Pj4gIMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIGhkci0+Z3NvX3R5cGUgfD0gVklS VElPX05FVF9IRFJfR1NPX0VDTjsKPj4+Pj4+PiAgwqDCoMKgwqDCoCB9IGVsc2UKPj4+Pj4+Pgo+ Pj4+Pj4KPj4+Pj4+IHBpbmcuCj4+Pj4+Pgo+Pj4+Pgo+Pj4+PiBEbyB5b3UgbWVhbiBnc29fc2l6 ZSBpcyBzZXQgYnV0IGdzb190eXBlIGlzIG5vdD8gTG9va3MgbGlrZSBhIGJ1Zwo+Pj4+PiBlbHNl d2hlcmUuCj4+Pj4+Cj4+Pj4+IFRoYW5rcwo+Pj4+Pgo+Pj4+Pgo+Pj4+IFllcy4KPj4+Pgo+Pj4+ IEkgY291bGQgbm90IHRyYWNlIGl0IHdoZXJlIGl0IGlzIGNvbWluZyBmcm9tLgo+Pj4+Cj4+Pj4g SSBzZWUgaXQgd2hlbiBkb2luZyByZWN2bW1zZyBvbiByYXcgc29ja2V0cyBpbiB0aGUgVU1MIHZl Y3RvciBuZXR3b3JrCj4+Pj4gZHJpdmVycy4KPj4+Pgo+Pj4KPj4+IEkgdGhpbmsgd2UgbmVlZCB0 byBmaW5kIHRoZSBjdWxwcml0IGFuZCBmaXggaXQgdGhlcmUsIGxvdHMgb2Ygb3RoZXIgdGhpbmdz Cj4+PiBjYW4gYnJlYWsgb3RoZXJ3aXNlLgo+Pj4gSnVzdCBwcmludGluZyBvdXQgc2tiLT5kZXYt Pm5hbWUgc2hvdWxkIGRvIHRoZSB0cmljaywgbm8/Cj4+Cj4+IFRoZSBwcmludGsgaW4gdmlydGlv X25ldF9oZHJfZnJvbV9za2Igc2F5cyBOVUxMLgo+Pgo+PiBUaGF0IGlzIHByb2JhYmx5IG5vcm1h bCBmb3IgYSBsb2NhbGx5IG9yaWdpbmF0ZWQgZnJhbWUuCj4+Cj4+IEkgY2Fubm90IHJlcHJvZHVj ZSB0aGlzIHdpdGggbmV0d29yayB0cmFmZmljIGJ5IHRoZSB3YXkgLSBpdCBoYXBwZW5zIG9ubHkg aWYgdGhlIHRyYWZmaWMgaXMgbG9jYWxseSBvcmlnaW5hdGVkIG9uIHRoZSBob3N0Lgo+Pgo+PiBB LAo+IAo+IE9LIHNvIGlzIGl0IGNvZGUgaW4gX190Y3BfdHJhbnNtaXRfc2tiIHRoYXQgc2V0cyBn c29fc2l6ZSB0byBub24tbnVsbAo+IHdoZW4gZ3NvX3R5cGUgaXMgMD8KPgoKQ29ycmVjdCB3YXkg dG8gZGV0ZXJtaW5lIGlmIGEgcGFja2V0IGlzIGEgZ3NvIG9uZSBpcyBieSBsb29raW5nIGF0IGdz b19zaXplLgpUaGVuIG9ubHkgaXQgaXMgbGVnYWwgbG9va2luZyBhdCBnc29fdHlwZQoKCnN0YXRp YyBpbmxpbmUgYm9vbCBza2JfaXNfZ3NvKGNvbnN0IHN0cnVjdCBza19idWZmICpza2IpCnsKICAg IHJldHVybiBza2Jfc2hpbmZvKHNrYiktPmdzb19zaXplOwp9CgovKiBOb3RlOiBTaG91bGQgYmUg Y2FsbGVkIG9ubHkgaWYgc2tiX2lzX2dzbyhza2IpIGlzIHRydWUgKi8Kc3RhdGljIGlubGluZSBi b29sIHNrYl9pc19nc29fdjYoY29uc3Qgc3RydWN0IHNrX2J1ZmYgKnNrYikKLi4uCgoKVGhlcmUg aXMgYWJzb2x1dGVseSBubyByZWxhdGlvbiBiZXR3ZWVuIEdTTyBhbmQgc2tiLT5kYXRhX2xlbiwg c2tiIGNhbiBiZSBsaW5lYXJpemVkCmZvciB2YXJpb3VzIG9ydGhvZ29uYWwgcmVhc29ucy4KCgpf X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpWaXJ0dWFsaXph dGlvbiBtYWlsaW5nIGxpc3QKVmlydHVhbGl6YXRpb25AbGlzdHMubGludXgtZm91bmRhdGlvbi5v cmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24ub3JnL21haWxtYW4vbGlzdGluZm8vdmly dHVhbGl6YXRpb24=