From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Josef Bacik To: Michael Tretter CC: "linux-block@vger.kernel.org" , Jens Axboe , "kernel@pengutronix.de" Subject: Re: [PATCH] nbd: do not update block size if file system is mounted Date: Sat, 14 Apr 2018 01:10:27 +0000 Message-ID: <3A32B506-71AE-48AF-A44A-B60F054ED40D@fb.com> References: <20180228095456.31472-1-m.tretter@pengutronix.de> <20180315110057.13eecda6@litschi.hi.pengutronix.de> <6c862ddf-b352-6ef4-06f8-516680e9f19f@kernel.dk> <20180413162518.47840e6f@litschi.hi.pengutronix.de> In-Reply-To: <20180413162518.47840e6f@litschi.hi.pengutronix.de> Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 List-ID: WWVhaCBzb3JyeSBJIHNjcmV3ZWQgdGhhdCB1cCBhZ2Fpbi4gIEnigJltIHdvbmRlcmluZyBpZiB3 ZSBjYW4ganVzdCBkcm9wIHRoaXMgYWx0b2dldGhlciBhbmQgbGVhdmUgdGhlIHplcm8gc2V0dGlu ZyBpbiB0aGUgY29uZmlnIHB1dCB0aGF0IHdlIGFscmVhZHkgaGF2ZS4gIERvZXMgZG9pbmcgdGhh dCBmaXggaXQgZm9yIHlvdT8gIFRoYW5rcywNCg0KSm9zZWYNCg0KU2VudCBmcm9tIG15IGlQaG9u ZQ0KDQo+IE9uIEFwciAxMywgMjAxOCwgYXQgMTA6MjYgQU0sIE1pY2hhZWwgVHJldHRlciA8bS50 cmV0dGVyQHBlbmd1dHJvbml4LmRlPiB3cm90ZToNCj4gDQo+PiBPbiBGcmksIDE2IE1hciAyMDE4 IDA5OjM2OjQ1IC0wNzAwLCBKZW5zIEF4Ym9lIHdyb3RlOg0KPj4+IE9uIDMvMTUvMTggMzowMCBB TSwgTWljaGFlbCBUcmV0dGVyIHdyb3RlOg0KPj4+PiBPbiBXZWQsIDI4IEZlYiAyMDE4IDEwOjU0 OjU2ICswMTAwLCBNaWNoYWVsIFRyZXR0ZXIgd3JvdGU6ICANCj4+Pj4gSWYgYSBmaWxlIHN5c3Rl bSBpcyBtb3VudGVkIG9uIHRoZSBuYmQgZHVyaW5nIGEgZGlzY29ubmVjdCwgcmVzZXR0aW5nDQo+ Pj4+IHRoZSBzaXplIHRvIDAsIG1pZ2h0IGNoYW5nZSB0aGUgYmxvY2sgc2l6ZSBhbmQgZGVzdHJv eSB0aGUgYnVmZmVyX2hlYWQNCj4+Pj4gbWFwcGluZ3MuIFRoaXMgd2lsbCBjYXVzZSBhIGluZmlu aXRlIGxvb3Agd2hlbiB0aGUgZmlsZSBzeXN0ZW0gbG9va3MgZm9yDQo+Pj4+IHRoZSBidWZmZXJf aGVhZHMgZm9yIGZsdXNoaW5nLg0KPj4+PiANCj4+Pj4gT25seSBzZXQgdGhlIGZpbGUgc2l6ZSB0 byAwLCBpZiB3ZSBhcmUgdGhlIG9ubHkgb3BlbmVyIG9mIHRoZSBuYmQuDQo+Pj4+IA0KPj4+PiBT aWduZWQtb2ZmLWJ5OiBNaWNoYWVsIFRyZXR0ZXIgPG0udHJldHRlckBwZW5ndXRyb25peC5kZT4N Cj4+Pj4gLS0tDQo+Pj4+IGRyaXZlcnMvYmxvY2svbmJkLmMgfCAzICsrLQ0KPj4+PiAxIGZpbGUg Y2hhbmdlZCwgMiBpbnNlcnRpb25zKCspLCAxIGRlbGV0aW9uKC0pDQo+Pj4+IA0KPj4+PiBkaWZm IC0tZ2l0IGEvZHJpdmVycy9ibG9jay9uYmQuYyBiL2RyaXZlcnMvYmxvY2svbmJkLmMNCj4+Pj4g aW5kZXggNWYyYTQyNDBhMjA0Li4wZDFkYmI2MDQzMGIgMTAwNjQ0DQo+Pj4+IC0tLSBhL2RyaXZl cnMvYmxvY2svbmJkLmMNCj4+Pj4gKysrIGIvZHJpdmVycy9ibG9jay9uYmQuYw0KPj4+PiBAQCAt MTExOCw3ICsxMTE4LDggQEAgc3RhdGljIGludCBuYmRfc3RhcnRfZGV2aWNlX2lvY3RsKHN0cnVj dCBuYmRfZGV2aWNlICpuYmQsIHN0cnVjdCBibG9ja19kZXZpY2UgKmINCj4+Pj4gICAgaWYgKHJl dCkNCj4+Pj4gICAgICAgIHNvY2tfc2h1dGRvd24obmJkKTsNCj4+Pj4gICAgbXV0ZXhfbG9jaygm bmJkLT5jb25maWdfbG9jayk7DQo+Pj4+IC0gICAgYmRfc2V0X3NpemUoYmRldiwgMCk7DQo+Pj4+ ICsgICAgaWYgKGJkZXYtPmJkX29wZW5lcnMgPD0gMSkNCj4+Pj4gKyAgICAgICAgYmRfc2V0X3Np emUoYmRldiwgMCk7DQo+Pj4+ICAgIC8qIHVzZXIgcmVxdWVzdGVkLCBpZ25vcmUgc29ja2V0IGVy cm9ycyAqLw0KPj4+PiAgICBpZiAodGVzdF9iaXQoTkJEX0RJU0NPTk5FQ1RfUkVRVUVTVEVELCAm Y29uZmlnLT5ydW50aW1lX2ZsYWdzKSkNCj4+Pj4gICAgICAgIHJldCA9IDA7ICANCj4+PiANCj4+ PiBBcmUgdGhlcmUgYW55IGNvbW1lbnRzIG9uIHRoaXMgcGF0Y2g/ICANCj4+IA0KPj4gSm9zZWY/ DQo+PiANCj4gDQo+IE1heWJlIHNvbWUgaGlzdG9yeSBoZWxwcyBmb3IgcmV2aWV3aW5nIHRoZSBw YXRjaDoNCj4gDQo+IENvbW1pdCBhYmJiZGYxMjQ5N2QgKCJuYmQ6IHJlcGxhY2Uga2lsbF9iZGV2 KCkgd2l0aA0KPiBfX2ludmFsaWRhdGVfZGV2aWNlKCkiKSBhbHJlYWR5IGZpeGVkIHRoaXMgaXNz dWUgb25jZSBieSBjaGFuZ2luZw0KPiBuYmRfc2l6ZV9jbGVhcigpIHRvIG9ubHkgc2V0IHRoZSBz aXplIHRvIDAgaWYgdGhlIGRldmljZSBpcyBvbmx5IG9wZW5lZA0KPiBvbmNlLiBUaGUgbGluZSB3 YXMgbW92ZWQgc2V2ZXJhbCB0aW1lcyBkdXJpbmcgdGhlIHJld29yayBmb3IgdGhlDQo+IG5ldGxp bmsgaW50ZXJmYWNlIGFuZCB0aGUgY2hlY2sgZm9yIHRoZSBudW1iZXIgb2Ygb3BlbmVycyB3YXMg ZHJvcHBlZCwNCj4gcmVpbnRyb2R1Y2luZyB0aGUgaXNzdWUuDQo+IA0KPiBNaWNoYWVsDQo=