From mboxrd@z Thu Jan 1 00:00:00 1970 From: Long Li Subject: RE: [Patch v7 21/22] CIFS: SMBD: Upper layer performs SMB read via RDMA write through memory registration Date: Thu, 20 Sep 2018 17:01:27 +0000 Message-ID: References: <20171107085514.12693-1-longli@exchange.microsoft.com> <20171107085514.12693-22-longli@exchange.microsoft.com> <9b02dadb-d21b-7a8d-7803-910041f66047@talpey.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <9b02dadb-d21b-7a8d-7803-910041f66047@talpey.com> Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org To: Tom Talpey , Steve French , "linux-cifs@vger.kernel.org" , "samba-technical@lists.samba.org" , "linux-kernel@vger.kernel.org" , "linux-rdma@vger.kernel.org" , Christoph Hellwig , Tom Talpey , Matthew Wilcox , Stephen Hemminger List-Id: linux-rdma@vger.kernel.org PiBTdWJqZWN0OiBSZTogW1BhdGNoIHY3IDIxLzIyXSBDSUZTOiBTTUJEOiBVcHBlciBsYXllciBw ZXJmb3JtcyBTTUIgcmVhZCB2aWENCj4gUkRNQSB3cml0ZSB0aHJvdWdoIG1lbW9yeSByZWdpc3Ry YXRpb24NCj4gDQo+IFJlcGx5aW5nIHRvIGEgdmVyeSBvbGQgbWVzc2FnZSwgYnV0IGl0J3Mgc29t ZXRoaW5nIHdlIGRpc2N1c3NlZCB0b2RheSBhdCB0aGUNCj4gSU9MYWIgZXZlbnQgc28gdG8gY2Fw dHVyZSBpdDoNCj4gDQo+IE9uIDExLzcvMjAxNyAxMjo1NSBBTSwgTG9uZyBMaSB3cm90ZToNCj4g PiBGcm9tOiBMb25nIExpIDxsb25nbGlAbWljcm9zb2Z0LmNvbT4NCj4gPg0KPiA+IC0tLQ0KPiA+ ICAgZnMvY2lmcy9maWxlLmMgICAgfCAxNyArKysrKysrKysrKysrKystLQ0KPiA+ICAgZnMvY2lm cy9zbWIycGR1LmMgfCA0NQ0KPiArKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysr KysrKysrKy0NCj4gPiAgIDIgZmlsZXMgY2hhbmdlZCwgNTkgaW5zZXJ0aW9ucygrKSwgMyBkZWxl dGlvbnMoLSkgLi4uDQo+ID4gZGlmZiAtLWdpdCBhL2ZzL2NpZnMvc21iMnBkdS5jIGIvZnMvY2lm cy9zbWIycGR1LmMgaW5kZXgNCj4gPiBjOGFmYjgzLi44YTVmZjkwIDEwMDY0NA0KPiA+IC0tLSBh L2ZzL2NpZnMvc21iMnBkdS5jDQo+ID4gKysrIGIvZnMvY2lmcy9zbWIycGR1LmMNCj4gPiBAQCAt MjM3OSw3ICsyMzc5LDQwIEBAIHNtYjJfbmV3X3JlYWRfcmVxKHZvaWQgKipidWYsIHVuc2lnbmVk IGludA0KPiAqdG90YWxfbGVuLA0KPiA+ICAgCXJlcS0+TWluaW11bUNvdW50ID0gMDsNCj4gPiAg IAlyZXEtPkxlbmd0aCA9IGNwdV90b19sZTMyKGlvX3Bhcm1zLT5sZW5ndGgpOw0KPiA+ICAgCXJl cS0+T2Zmc2V0ID0gY3B1X3RvX2xlNjQoaW9fcGFybXMtPm9mZnNldCk7DQo+ID4gKyNpZmRlZiBD T05GSUdfQ0lGU19TTUJfRElSRUNUDQo+ID4gKwkvKg0KPiA+ICsJICogSWYgd2Ugd2FudCB0byBk byBhIFJETUEgd3JpdGUsIGZpbGwgaW4gYW5kIGFwcGVuZA0KPiA+ICsJICogc21iZF9idWZmZXJf ZGVzY3JpcHRvcl92MSB0byB0aGUgZW5kIG9mIHJlYWQgcmVxdWVzdA0KPiA+ICsJICovDQo+ID4g KwlpZiAoc2VydmVyLT5yZG1hICYmIHJkYXRhICYmDQo+ID4gKwkJcmRhdGEtPmJ5dGVzID49IHNl cnZlci0+c21iZF9jb25uLQ0KPiA+cmRtYV9yZWFkd3JpdGVfdGhyZXNob2xkKSB7DQo+ID4gKw0K PiA+ICsJCXN0cnVjdCBzbWJkX2J1ZmZlcl9kZXNjcmlwdG9yX3YxICp2MTsNCj4gPiArCQlib29s IG5lZWRfaW52YWxpZGF0ZSA9DQo+ID4gKwkJCWlvX3Bhcm1zLT50Y29uLT5zZXMtPnNlcnZlci0+ ZGlhbGVjdCA9PQ0KPiBTTUIzMF9QUk9UX0lEOw0KPiA+ICsNCj4gPiArCQlyZGF0YS0+bXIgPSBz bWJkX3JlZ2lzdGVyX21yKA0KPiA+ICsJCQkJc2VydmVyLT5zbWJkX2Nvbm4sIHJkYXRhLT5wYWdl cywNCj4gPiArCQkJCXJkYXRhLT5ucl9wYWdlcywgcmRhdGEtPnRhaWxzeiwNCj4gPiArCQkJCXRy dWUsIG5lZWRfaW52YWxpZGF0ZSk7DQo+ID4gKwkJaWYgKCFyZGF0YS0+bXIpDQo+ID4gKwkJCXJl dHVybiAtRU5PQlVGUzsNCj4gPiArDQo+ID4gKwkJcmVxLT5DaGFubmVsID0gU01CMl9DSEFOTkVM X1JETUFfVjFfSU5WQUxJREFURTsNCj4gPiArCQlpZiAobmVlZF9pbnZhbGlkYXRlKQ0KPiA+ICsJ CQlyZXEtPkNoYW5uZWwgPSBTTUIyX0NIQU5ORUxfUkRNQV9WMTsNCj4gPiArCQlyZXEtPlJlYWRD aGFubmVsSW5mb09mZnNldCA9DQo+ID4gKwkJCW9mZnNldG9mKHN0cnVjdCBzbWIyX3JlYWRfcGxh aW5fcmVxLCBCdWZmZXIpOw0KPiA+ICsJCXJlcS0+UmVhZENoYW5uZWxJbmZvTGVuZ3RoID0NCj4g PiArCQkJc2l6ZW9mKHN0cnVjdCBzbWJkX2J1ZmZlcl9kZXNjcmlwdG9yX3YxKTsNCj4gPiArCQl2 MSA9IChzdHJ1Y3Qgc21iZF9idWZmZXJfZGVzY3JpcHRvcl92MSAqKSAmcmVxLT5CdWZmZXJbMF07 DQo+ID4gKwkJdjEtPm9mZnNldCA9IHJkYXRhLT5tci0+bXItPmlvdmE7DQo+IA0KPiBJdCdzIHVu bmVjZXNzYXJ5LCBhbmQgcG9zc2libHkgbGVha2luZyBrZXJuZWwgaW5mb3JtYXRpb24sIHRvIHVz ZSB0aGUgSU9WQSBhcw0KPiB0aGUgb2Zmc2V0IG9mIGEgbWVtb3J5IHJlZ2lvbiB3aGljaCBpcyBy ZWdpc3RlcmVkIHVzaW5nIGFuIEZSV1IuIEJlY2F1c2UNCj4gc3VjaCByZWdpb25zIGFyZSBiYXNl ZCBvbiB0aGUgZXhhY3QgYnl0ZXMgdGFyZ2V0ZWQgYnkgdGhlIG1lbW9yeSBoYW5kbGUsDQo+IHRo ZSBvZmZzZXQgY2FuIGJlIHNldCB0byBhbnkgdmFsdWUsIHR5cGljYWxseSB6ZXJvLCBidXQgbmVh cmx5IGFyYml0cmFyeS4gQXMgbG9uZw0KPiBhcyB0aGUgKG9mZnNldCArIGxlbmd0aCkgZG9lcyBu b3Qgd3JhcCBvciBvdGhlcndpc2Ugb3ZlcmZsb3csIG9mZnNldCBjYW4gYmUNCj4gc2V0IHRvIGFu eXRoaW5nIGNvbnZlbmllbnQuDQo+IA0KPiBTaW5jZSBTTUIgcmVhZHMgYW5kIHdyaXRlcyByYW5n ZSB1cCB0byA4TUIsIEknZCBzdWdnZXN0IHplcm9pbmcgdGhlIGxlYXN0DQo+IHNpZ25pZmljYW50 IDIzIGJpdHMsIHdoaWNoIHNob3VsZCBndWFyYW50ZWUgaXQuIFRoZSBvdGhlciA0MSBiaXRzLCBw YXJ0eSBvbi4gWW91DQo+IGNvdWxkIHJhbmRvbWl6ZSB0aGVtLCBwYXNzIHNvbWUgY2xldmVyIGlk ZW50aWZpZXIgc3VjaCBhcyBNSUQgc2VxdWVuY2UsDQo+IHdoYXRldmVyLg0KPiANCj4gVG9tLg0K DQpUaGFua3MgVG9tLiBJIHdpbGwgZml4IHRoaXMuDQoNCj4gDQo+ID4gKwkJdjEtPnRva2VuID0g cmRhdGEtPm1yLT5tci0+cmtleTsNCj4gPiArCQl2MS0+bGVuZ3RoID0gcmRhdGEtPm1yLT5tci0+ bGVuZ3RoOw0K