Return-Path: Received: from mail-co1nam03on0132.outbound.protection.outlook.com ([104.47.40.132]:45034 "EHLO NAM03-CO1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S966949AbeE2Vhp (ORCPT ); Tue, 29 May 2018 17:37:45 -0400 From: Trond Myklebust To: "linux-nfs@vger.kernel.org" , "rgoldwyn@suse.de" , "linux-unionfs@vger.kernel.org" Subject: Re: nfs4_acl restricts copy_up in overlayfs Date: Tue, 29 May 2018 21:37:42 +0000 Message-ID: References: In-Reply-To: Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Sender: linux-nfs-owner@vger.kernel.org List-ID: T24gVHVlLCAyMDE4LTA1LTI5IGF0IDE1OjMyIC0wNTAwLCBHb2xkd3luIFJvZHJpZ3VlcyB3cm90 ZToNCj4gV2hpbGUgbW91bnRpbmcgb3ZlcmxheWZzIHdpdGggTkZTIGFzIGEgbG93ZXIgZGlyZWN0 b3J5IGFuZCBhIGxvY2FsDQo+IGZpbGVzeXN0ZW0gYXMgYW4gdXBwZXIgbGF5ZXIgbGVhZHMgdG8g Y29weV91cCBmYWlsdXJlcyBiZWNhdXNlIE5GUzQNCj4gaGFzDQo+IGFuIGV4dHJhIHN5c3RlbS5u ZnM0X2FjbCB3aGljaCBjYW5ub3QgYmUgY29waWVkIHVwLiBUaGlzIGhhcyBiZWVuDQo+IGRpc2N1 c3NlZCBiZWZvcmUgWzFdIGFuZCBbMl0gd2l0aCB0aGUgc3VnZ2VzdGlvbiB0aGF0IG5mczRfYWNs IGlzDQo+IGRlcml2ZWQgZnJvbSBwb3NpeF9hY2xzIG9yIGp1c3QgaW5vZGUtPmlfbW9kZSAqbW9z dCogb2YgdGhlIHRpbWVzIGFuZA0KPiBoZW5jZSBpdCBjYW4gYmUgbWFwcGVkIGJhY2suDQo+IA0K PiBUaGUgcHJvYmxlbSBpcyBORlMgY2xpZW50IGtub3dzIG5vdGhpbmcgYWJvdXQgbmZzNF9hY2wg YW5kIGl0IGlzDQo+IGRlY29kZWQNCj4gaW4gbmZzNC1hY2wtdG9vbHMuIEV2ZW4gaWYgd2UgbWFr ZSBuZnMgY2xpZW50IGNhcGFibGUgb2YgdW5kZXJzdGFuZA0KPiBuZnM0X2FjbCB4YXR0ciwgY2Fu IGl0IGJlIHVzZWQgdG8gcGVyZm9ybSBBQ0wncyBmb3IgdGhlIHN5c3RlbS4NCj4gQUZBSVUsDQo+ IGl0IGlzIHVzZXMgdXNlci9ncm91cCBuYW1lcyBhcyBvcHBvc2VkIHVpZC9naWQgdG8gcGVyZm9y bSBpZCBtYXBwaW5nLg0KPiBDYW4gdGhlIGNsaWVudCBtYXAgaXQgYmFjayB0byB1c2VyIG5hbWVz IGFuZCBkZXJpdmUgaWYgaXQgaXMganVzdCBhbg0KPiByZXBsaWNhIG9mIGlub2RlJ3MgaV9tb2Rl Pw0KPiANCj4gVGhlIGlkZWEgaXMgdG8gc3VwcHJlc3MgbmZzNF9hY2wgaWYgaXQgaXMgdGhlIHNh bWUgYXMgaW5vZGUncyBpX21vZGUuDQo+IFRoaXMgbWVhbnMgbmZzNC1hY2wtdG9vbHMvbmZzNF9n ZXRhY2wgd291bGQgZ2l2ZSBubyByZXN1bHRzIHdoZW4NCj4gcmVxdWVzdGluZyBmb3IgQUNMcy4g VGhpcyB3b3VsZCBicmVhayBleGlzdGluZyBhcHBsaWNhdGlvbnMgaWYgdGhleQ0KPiBleHBlY3Qg c29tZSBvdXRwdXQgZnJvbSBuZnM0X2dldGZhY2wuDQo+IA0KPiBJcyB0aGVyZSBhIGJldHRlciB3 YXkgdG8gaWRlbnRpZnkgaWYgbmZzNF9hY2wgaXMganVzdCBhDQo+IHJlcHJlc2VudGF0aW9uDQo+ IG9mIGlfbW9kZSBhdCB0aGUgY2xpZW50IGVuZCBhbmQgY2FuIGJlIHNhZmVseSBpZ25vcmVkIGR1 cmluZyBhbg0KPiBvdmVybGF5ZnMgY29weV91cD8gQ2FuIHdlIGluY2x1ZGUgYSBmbGFnIGZvciB0 aGlzPw0KPiANCj4gDQo+IFsxXSBodHRwczovL3d3dy5zcGluaWNzLm5ldC9saXN0cy9saW51eC1u ZnMvbXNnNjEwNDUuaHRtbA0KPiBbMl0gaHR0cHM6Ly93d3cuc3Bpbmljcy5uZXQvbGlzdHMvbGlu dXgtdW5pb25mcy9tc2cwNDczNi5odG1sDQo+IA0KDQpJZiB0aGUgcGVybWlzc2lvbnMgYXJlIHVu Y2hhbmdlZCBzbyB0aGF0IG92ZXJsYXlmcyBpcyBub3QgdHJ5aW5nIHRvDQpvdmVycmlkZSB0aGUg d2F5IHRoZSBzZXJ2ZXIgaW50ZXJwcmV0cyB0aGUgQUNMLCBhbmQgY3JlZGVudGlhbCBoZWxkIGJ5 DQp0aGUgdXNlciwgdGhlbiB5b3UgYXJlIGJldHRlciBvZmYgY2FsbGluZyB0aGUgTGludXggY2xp ZW50IGZvcg0Kb3Blbi9jbG9zZSBhbmQgcGVybWlzc2lvbnMgY2FsbHMuDQoNCk9uY2UgeW91J3Zl IGFsbG93ZWQgdGhlIHVzZXIgdG8gY2htb2Qgb3IgY2hvd24gdGhlIGZpbGUsIHlvdSBhcmUgb24N CnlvdXIgb3duLCBiZWNhdXNlIHlvdXIgc2VjdXJpdHkgbW9kZWwgZm9yIHRoZSBmaWxlIHdpbGwg aGF2ZSBmb3JrZWQNCndpdGggdGhlIHNlY3VyaXR5IG1vZGVsIHByb3ZpZGVkIGJ5IE5GUy4gQXQg dGhhdCBwb2ludCwgdGhlIGZpbGUgaGFkDQpiZXR0ZXIgaGF2ZSBiZWVuIGNvcGllZCB1cCwgYW5k IHlvdSdkIGJldHRlciBiZSByZWFkeSB0byBtYW5hZ2UgaXQNCmVudGlyZWx5IGZyb20gb3Zlcmxh eWZzLg0KDQpUaGUgYWJvdmUgYXBwbGllcyBub3Qgb25seSB3aGVuIHRoZSBmaWxlIGlzIHN1Ympl Y3QgdG8gTkZTdjQgYWNscywgYnV0DQppdCBpcyBhbHNvIHRydWUgd2hlbiB5b3UgYXJlIHVzaW5n IHN0cm9uZyBhdXRoZW50aWNhdGlvbiAoaS5lLiBLZXJiZXJvcw0KVikuDQoNCi0tIA0KVHJvbmQg TXlrbGVidXN0DQpMaW51eCBORlMgY2xpZW50IG1haW50YWluZXIsIEhhbW1lcnNwYWNlDQp0cm9u ZC5teWtsZWJ1c3RAaGFtbWVyc3BhY2UuY29tDQoNCg==