From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-194.mimecast.com ([63.128.21.194]:26727 "EHLO us-smtp-delivery-194.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933874AbdDGO5o (ORCPT ); Fri, 7 Apr 2017 10:57:44 -0400 From: Trond Myklebust To: "miklos@szeredi.hu" , "amir73il@gmail.com" CC: "bfields@fieldses.org" , "viro@zeniv.linux.org.uk" , "jlayton@poochiereds.net" , Trond Myklebust , "linux-unionfs@vger.kernel.org" , "linux-fsdevel@vger.kernel.org" Subject: Re: overlayfs NFS export Date: Fri, 7 Apr 2017 14:57:37 +0000 Message-ID: <1491577054.10609.1.camel@primarydata.com> References: In-Reply-To: Content-Language: en-US Content-ID: <5D3734DBBE6F1F4599C96C06151F1C7A@namprd11.prod.outlook.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Sender: linux-fsdevel-owner@vger.kernel.org List-ID: T24gRnJpLCAyMDE3LTA0LTA3IGF0IDE3OjI5ICswMzAwLCBBbWlyIEdvbGRzdGVpbiB3cm90ZToN Cj4gW2NoYW5naW5nIHRoZSBzdWJqZWN0IGFuZCBhZGRpbmcgbW9yZSBORlMgZ3V5cyBzbyB0aGV5 IGNhbiBzaG9vdCBteQ0KPiBpZGVhIGRvd24gaWYgaXQgaXMgdG9vIGR1bWIgdG8gbGl2ZV0NCj4g DQo+IE9uIEZyaSwgQXByIDcsIDIwMTcgYXQgNDowMyBQTSwgTWlrbG9zIFN6ZXJlZGkgPG1pa2xv c0BzemVyZWRpLmh1Pg0KPiB3cm90ZToNCj4gPiBPbiBGcmksIEFwciA3LCAyMDE3IGF0IDEyOjQ3 IFBNLCBBbWlyIEdvbGRzdGVpbiA8YW1pcjczaWxAZ21haWwuY29tDQo+ID4gPiB3cm90ZToNCj4g PiANCj4gPiA+IENvbWUgdG8gdGhpbmsgYWJvdXQgaXQsIE5GUyBleHBvcnQgb2YgcmVndWxhciBm aWxlIGRvbid0IG5lZWQgdG8NCj4gPiA+IGZvbGxvdyByZW5hbWVzIGF0IGFsbDoNCj4gPiA+IC0g VGhlIGhhbmRsZSBmb3IgYSByZWd1bGFyIGZpbGUgaXMgYWx3YXlzIHRoZSBoYW5kbGUgZm9yIHRo ZSByZWFsDQo+ID4gPiBsb3dlciBvciB1cHBlciBpbm9kZQ0KPiA+ID4gLSBUbyBkZWNvZGUgYSBo YW5kbGUsIGNyZWF0ZSBhbiBPX1RNUEZJTEUgc3R5bGUgb3ZlcmxheSBkZW50cnksDQo+ID4gPiB3 aGljaA0KPiA+ID4gaXMgbm90IGxpbmtlZA0KPiA+ID4gwqAgdG8gYW55IHBhdGggaW4gb3Zlcmxh eSwgYnV0IGhhcyB0aGUgX3VwcGVyZGVudHJ5L2xvd2Vyc3RhY2sNCj4gPiA+IHNldHVwDQo+ID4g DQo+ID4gSSBkb24ndCB0aGluayBuZnMgd2lsbCBhbGxvdyBzdWNoIGEgc2NoZW1lLsKgwqBORlMz IHNlcnZlciBpcw0KPiA+IHN0YXRlbGVzcywNCj4gPiB3aGljaCBtZWFucyB0aGVyZSdzIG5vIG9w ZW4vY2xvc2UgaW4gdGhlIHByb3RvY29sLsKgwqDCoEhlbmNlIHdlIGNhbid0DQo+ID4gY29weS11 cCBvbiBvcGVuKE9fV1IqKSBhbmQgcmV0dXJuIGEgZGlmZmVyZW50IGZpbGUgaGFuZGxlIGZvcg0K PiA+IHdyaXRpbmcuDQo+ID4gSWYgY2xpZW50IGxvb2tzIHVwIGEgZmlsZSBjdXJyZW50bHkgb24g bG93ZXIgYW5kIHdlIHJldHVybiBmaWxlDQo+ID4gaGFuZGxlDQo+ID4gYmFzZWQgb24gbG93ZXIg ZmlsZSwgdGhlbiB3ZSBtdXN0IGJlIGFibGUgdG8gZGVjb2RlIHRoYXQgaGFuZGxlDQo+ID4gYWZ0 ZXINCj4gPiB0aGUgZmlsZSBoYXMgYmVlbiBjb3BpZWQgdXAgYW5kIGV2ZW4gYWZ0ZXIgcmVuYW1l LsKgwqBBbmQgdGhpcyBtdXN0DQo+ID4gd29yaw0KPiA+IHJlbGlhYmx5IGV2ZW4gaWYgdGhlIG92 ZXJsYXkgZGVudHJ5IGlzIG5vIGxvbmdlciBpbiB0aGUgZGNhY2hlLg0KPiA+IA0KPiA+IFNvIHRo ZXJlJ3Mgbm8gb3B0aW9uLCBvdGhlciB0aGFuIHRvIGhhdmUgYSByZXZlcnNlIG1hcHBpbmcNCj4g PiBzb21ld2hlcmUuDQo+ID4gDQo+IA0KPiBFaXRoZXIgSSBhbSBtaXNzaW5nIHNvbWV0aGluZyBv ciB5b3UgYXJlLg0KPiANCj4gQ29uc2lkZXIgdGhpcyBzY2VuYXJpbzoNCj4gDQo+IE9uIHNlcnZl cjoNCj4gLSB0b3VjaCBhDQo+IC0gbG4gYSBiDQo+IA0KPiBPbiBORlMgY2xpZW50Og0KPiAtIHJv ZmQgPSBvcGVuKCJhIiwgT19SRE9OTFkpDQo+IA0KPiBPbiBzZXJ2ZXINCj4gLSBybSBhDQo+IC0g cmVib290DQo+IA0KPiBORlMgY2xpZW50IG11c3QgYmUgYWJsZSB0byBjb250aW51ZSB0byB3b3Jr IHdpdGggcm9mZA0KPiBldmVuIGFmdGVyIHJlYm9vdCBhbmQgZXZlbiBhZnRlciBvcmlnaW5hbCBm aWxlIHdhcyB1bmxpbmtlZC4NCj4gDQo+IEZ1cnRoZXJtb3JlLCBvbiBzZXJ2ZXI6DQo+IC0gcm0g Yg0KPiANCj4gTkZTIGNsaWVudCBtdXN0IGNvbnRpbnVlIHRvIHdvcmsgd2l0aCByb2ZkIGV2ZW4g dGhvdWdoDQo+IE5GUyBzZXJ2ZXIgaXMgc3RhdGVsZXNzIGFuZCBldmVuIHRob3VnaCBpbm9kZSBp cyBub3cNCj4gbmxpbmsgPSAwLg0KPiBUaGF0IGlzIHBvc3NpYmxlIGJlY2F1c2UgZnMgd2lsbCBp bnN0YW50aWF0ZSBhIGRpc2Nvbm5lY3RlZA0KPiBkZW50cnkgd2hlbiBkZWNvZGluZyB0aGUgZmls ZSBoYW5kbGUgaXMgdGhlcmUgaXMgbm8gZGVudHJ5DQo+IGFscmVhZHkgaW4gY2FjaGUuDQo+IA0K PiBTbyB3aGF0IEkgYW0gc2F5aW5nIGlzIHRoYXQgd2hlbiBuZnNkIHRyaWVzIHRvIGRlY29kZQ0K PiBhIGhhbmRsZSBmcm9tIG92ZXJsYXkgbW91bnQsIGFuZCB0aGVyZSBpcyBubyBtYXRoY2luZw0K PiBvdmVybGF5IGRlbnRyeSBpbiBjYWNoZSAod2l0aCB0aGUgbG93ZXIgaW5vIG9mIGNvdXJzZSkN Cj4gdGhlbiB3ZSBpbnN0YW50aWF0ZSBhIG5ldyBkaXNjb25uZWN0ZWQgZGVudHJ5IHdpdGhvdXQN Cj4gbG9va3VwIGFuZCBzZXQgaXRzIF91cHBlcmRlbnJ5IG9yIGxvd2Vyc3RhY2sgYWNjb3JkaW5n DQo+IHRvIHRoZSBrbm93bGVkZ2UgdGhhdCB3ZSBmb3VuZCB0aGUgaGFuZGxlIGluIHVuZGVybHlp bmcNCj4gZnMgYW5kIHdlIGNoZWNrZWQgaWYgaXQgaXMgYSBkZWNlZGVudCBvZiBsb3dlcl9tbnRb aV0gb3INCj4gdXBwZXJfbW50Lg0KPiANCj4gV2hlbiBORlMgY2xpZW50IG9wZW5zIGEgbmV3IHJ3 ZmQgaXQgV0lMTCBnZXQgYSBkaWZmZXJlbnQNCj4gaGFuZGxlLCBidXQgaXQgV0lMTCByZWFsbHkg YmUgYSBkaWZmZXJlbnQgZmlsZSB0aGVuIHRoZSByb2ZkLA0KPiBzbyB0aGF0IHNvdW5kcyBsaWtl IGEgZ29vZCB0aGluZz8NCj4gDQo+IEkgcmVhbGl6ZSBpdCBtYXkgc291bmQgY29tcGxpY2F0ZWQs IGJ1dCByZWRpcmVjdF9maCBwYXRjaA0KPiBoYXMgYWxyZWFkeSBhbGwgdGhlIG5lZWRlZCBwYXJ0 cyBpbiBwbGFjZSBmb3IgdGhpcywgc28gdGhlDQo+IHByb29mIGlmIHdoYXQgSSBhbSBzYXlpbmcg aXMgcmlnaHQgb3Igd3Jvbmcgd2lsbCBiZSBpbiB3aGV0aGVyDQo+IG9yIG5vdCBJIGFtIGFibGUg dG8gcHJlc2VudCBhIHdvcmtpbmcgUE9DLi4uDQo+IA0KDQpXaGF0IGlzIHRoZSBwcm9ibGVtIHlv dSBhcmUgdHJ5aW5nIHRvIHNvbHZlPw0KDQpBcyBmYXIgYXMgdGhlIE5GUyBwcm90b2NvbCBpcyBj b25jZXJuZWQsIGlmIDIgZmlsZWhhbmRsZXPCoHRoYXQNCm9yaWdpbmF0ZSBmcm9tIHRoZSBzYW1l IHNlcnZlciBhcmUgZXF1YWwgKGkuZS4gYSBieXRlLWJ5LWJ5dGUNCmNvbXBhcmlzb24gb2YgdGhl aXIgY29udGVudHMgc2hvd3MgYSBtYXRjaCksIHRoZW4gdGhleSBNVVNUIHJlZmVyIHRvDQp0aGUg c2FtZSBmaWxlLg0KDQpPbiB0aGUgb3RoZXIgaGFuZCwgaWYgdGhlIGZpbGVoYW5kbGVzIGRpZmZl ciwgdGhlbiB0aGV5IGFyZSBfdHJlYXRlZF8NCmJ5IGJvdGggdGhlIGNsaWVudCBhbmQgdGhlIHNl cnZlciBhcyBpZiB0aGV5IHdlcmUgcG9pbnRpbmcgdG8gZGlmZmVyZW50DQpmaWxlcyAoZXZlbiBp ZiB0aGF0IGlzIG5vdCB0aGUgY2FzZSkuIFRoYXQgcHJpbmNpcGxlIGlzIGV2ZW4gZW5jb2RlZCBp bg0KdGhlIE5GU3Y0IHByb3RvY29sLCB3aGVyZSBpdCBpcyBhIHJlcXVpcmVtZW50IHRoYXQgZmls ZSBzdGF0ZSBpcw0KYXR0YWNoZWQgdG8gdGhlIGZpbGVoYW5kbGUuDQoNCi0tIA0KVHJvbmQgTXlr bGVidXN0DQpMaW51eCBORlMgY2xpZW50IG1haW50YWluZXIsIFByaW1hcnlEYXRhDQp0cm9uZC5t eWtsZWJ1c3RAcHJpbWFyeWRhdGEuY29tDQo=