From mboxrd@z Thu Jan 1 00:00:00 1970 From: majianpeng Subject: Re: Re: [PATCH V4 1/2] ceph: Implement readv/preadv for sync operation. Date: Sun, 22 Sep 2013 11:00:11 +0800 Message-ID: <201309221100079637870@gmail.com> References: <201309121325129235088@gmail.com>, Reply-To: majianpeng Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: base64 Return-path: Received: from mail-pb0-f48.google.com ([209.85.160.48]:38728 "EHLO mail-pb0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752599Ab3IVDAQ (ORCPT ); Sat, 21 Sep 2013 23:00:16 -0400 Received: by mail-pb0-f48.google.com with SMTP id ma3so1854714pbc.7 for ; Sat, 21 Sep 2013 20:00:15 -0700 (PDT) Sender: ceph-devel-owner@vger.kernel.org List-ID: To: =?iso-8859-1?B?WWFuLCBaaGVuZw==?= Cc: sage , =?iso-8859-1?B?WWFuLCBaaGVuZw==?= , ceph-devel Pk9uIFRodSwgU2VwIDEyLCAyMDEzIGF0IDE6MjUgUE0sIG1hamlhbnBlbmcgPG1hamlhbnBlbmdA Z21haWwuY29tPiB3cm90ZToNCj4+IEZvciByZWFkdi9wcmVhZHYgc3luYy1vcGVyYXRvaW4sIGNl cGggb25seSBkbyB0aGUgZmlyc3QgaW92Lg0KPj4gSXQgZG9uJ3QgdGhpbmsgb3RoZXIgaW92cy5O b3cgaW1wbGVtZW50IHRoaXMuDQo+Pg0KPj4gVjQ6DQo+PiAgICAgICAgIG1vZGlmeSBvbmUgYnVn Lg0KPj4gVjM6DQo+PiAgICBtb2RpZnkgc29tZSBidWcuDQo+PiBWMjoNCj4+ICAgLWFkZCBnZW5l cmljX3NlZ21lbnRfY2hlY2tzDQo+PiAgIC11c2luZyBzdHJ1Y3QgaW92X2l0ZXIgcmVwbGFjZSBj bG9uaW5nIHRoZSBpb3ZzLg0KPj4gICAtcmV0dXJuIHByZXZpb3VzIHN1Y2Nlc3NmdWxseSBjb3Bp ZWQgaWYgY2VwaF9jb3B5X3BhZ2VfdmVjdG9yX3RvX3VzZXINCj4+ICAgIG1ldCBlcnJvci4NCj4+ DQo+Pg0KPj4gU2lnbmVkLW9mZi1ieTogSmlhbnBlbmcgTWEgPG1hamlhbnBlbmdAZ21haWwuY29t Pg0KPj4gUmV2aWV3ZWQtYnk6IFlhbiwgWmhlbmcgPHpoZW5nLnoueWFuQGludGVsLmNvbT4NCj4+ IC0tLQ0KPj4gICBmcy9jZXBoL2ZpbGUuYyB8IDE1NyArKysrKysrKysrKysrKysrKysrKysrKysr KysrKysrKysrKysrKy0tLS0tLS0tLS0tLS0tLS0tLS0NCj4+ICAxIGZpbGUgY2hhbmdlZCwgMTA2 IGluc2VydGlvbnMoKyksIDUxIGRlbGV0aW9ucygtKQ0KPj4NCj4+IGRpZmYgLS1naXQgYS9mcy9j ZXBoL2ZpbGUuYyBiL2ZzL2NlcGgvZmlsZS5jDQo+PiBpbmRleCAzZGU4OTgyLi5iYzdmYTUyIDEw MDY0NA0KPj4gLS0tIGEvZnMvY2VwaC9maWxlLmMNCj4+ICsrKyBiL2ZzL2NlcGgvZmlsZS5jDQo+ PiBAQCAtNDA4LDUxICs0MDgsOTQgQEAgbW9yZToNCj4+ICAgKg0KPj4gICAqIElmIHRoZSByZWFk IHNwYW5zIG9iamVjdCBib3VuZGFyeSwganVzdCBkbyBtdWx0aXBsZSByZWFkcy4NCj4+ICAgKi8N Cj4+IC1zdGF0aWMgc3NpemVfdCBjZXBoX3N5bmNfcmVhZChzdHJ1Y3QgZmlsZSAqZmlsZSwgY2hh ciBfX3VzZXIgKmRhdGEsDQo+PiAtICAgICAgICAgICAgICAgICAgICAgICAgICAgICB1bnNpZ25l ZCBsZW4sIGxvZmZfdCAqcG9mZiwgaW50ICpjaGVja2VvZikNCj4+ICtzdGF0aWMgc3NpemVfdCBj ZXBoX3N5bmNfcmVhZChzdHJ1Y3Qga2lvY2IgKmlvY2IsIHN0cnVjdCBpb3ZfaXRlciAqaSwNCj4+ ICsgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgaW50ICpjaGVja2VvZikNCj4+ICB7DQo+ PiArICAgICAgIHN0cnVjdCBmaWxlICpmaWxlID0gaW9jYi0+a2lfZmlscDsNCj4+ICAgICAgICAg c3RydWN0IGlub2RlICppbm9kZSA9IGZpbGVfaW5vZGUoZmlsZSk7DQo+PiAgICAgICAgIHN0cnVj dCBwYWdlICoqcGFnZXM7DQo+PiAtICAgICAgIHU2NCBvZmYgPSAqcG9mZjsNCj4+ICsgICAgICAg dTY0IG9mZiA9IGlvY2ItPmtpX3BvczsNCj4+ICAgICAgICAgaW50IG51bV9wYWdlcywgcmV0Ow0K Pj4NCj4+IC0gICAgICAgZG91dCgic3luY19yZWFkIG9uIGZpbGUgJXAgJWxsdX4ldSAlc1xuIiwg ZmlsZSwgb2ZmLCBsZW4sDQo+PiArICAgICAgIGRvdXQoInN5bmNfcmVhZCBvbiBmaWxlICVwICVs bHV+JXUgJXNcbiIsIGZpbGUsIG9mZiwNCj4+ICsgICAgICAgICAgICAodW5zaWduZWQpaW9jYi0+ a2lfbGVmdCwNCj4+ICAgICAgICAgICAgICAoZmlsZS0+Zl9mbGFncyAmIE9fRElSRUNUKSA/ICJP X0RJUkVDVCIgOiAiIik7DQo+PiAtDQo+PiAtICAgICAgIGlmIChmaWxlLT5mX2ZsYWdzICYgT19E SVJFQ1QpIHsNCj4+IC0gICAgICAgICAgICAgICBudW1fcGFnZXMgPSBjYWxjX3BhZ2VzX2Zvcigo dW5zaWduZWQgbG9uZylkYXRhLCBsZW4pOw0KPj4gLSAgICAgICAgICAgICAgIHBhZ2VzID0gY2Vw aF9nZXRfZGlyZWN0X3BhZ2VfdmVjdG9yKGRhdGEsIG51bV9wYWdlcywgdHJ1ZSk7DQo+PiAtICAg ICAgIH0gZWxzZSB7DQo+PiAtICAgICAgICAgICAgICAgbnVtX3BhZ2VzID0gY2FsY19wYWdlc19m b3Iob2ZmLCBsZW4pOw0KPj4gLSAgICAgICAgICAgICAgIHBhZ2VzID0gY2VwaF9hbGxvY19wYWdl X3ZlY3RvcihudW1fcGFnZXMsIEdGUF9OT0ZTKTsNCj4+IC0gICAgICAgfQ0KPj4gLSAgICAgICBp ZiAoSVNfRVJSKHBhZ2VzKSkNCj4+IC0gICAgICAgICAgICAgICByZXR1cm4gUFRSX0VSUihwYWdl cyk7DQo+PiAtDQo+PiAgICAgICAgIC8qDQo+PiAgICAgICAgICAqIGZsdXNoIGFueSBwYWdlIGNh Y2hlIHBhZ2VzIGluIHRoaXMgcmFuZ2UuICB0aGlzDQo+PiAgICAgICAgICAqIHdpbGwgbWFrZSBj b25jdXJyZW50IG5vcm1hbCBhbmQgc3luYyBpbyBzbG93LA0KPj4gICAgICAgICAgKiBidXQgaXQg d2lsbCBhdCBsZWFzdCBiZWhhdmUgc2Vuc2libHkgd2hlbiB0aGV5IGFyZQ0KPj4gICAgICAgICAg KiBpbiBzZXF1ZW5jZS4NCj4+ICAgICAgICAgICovDQo+PiAtICAgICAgIHJldCA9IGZpbGVtYXBf d3JpdGVfYW5kX3dhaXQoaW5vZGUtPmlfbWFwcGluZyk7DQo+PiArICAgICAgIHJldCA9IGZpbGVt YXBfd3JpdGVfYW5kX3dhaXRfcmFuZ2UoaW5vZGUtPmlfbWFwcGluZywgb2ZmLA0KPj4gKyAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgb2ZmICsgaW9jYi0+a2lf bGVmdCk7DQo+PiAgICAgICAgIGlmIChyZXQgPCAwKQ0KPj4gLSAgICAgICAgICAgICAgIGdvdG8g ZG9uZTsNCj4+IC0NCj4+IC0gICAgICAgcmV0ID0gc3RyaXBlZF9yZWFkKGlub2RlLCBvZmYsIGxl biwgcGFnZXMsIG51bV9wYWdlcywgY2hlY2tlb2YsDQo+PiAtICAgICAgICAgICAgICAgICAgICAg ICAgICBmaWxlLT5mX2ZsYWdzICYgT19ESVJFQ1QsDQo+PiAtICAgICAgICAgICAgICAgICAgICAg ICAgICAodW5zaWduZWQgbG9uZylkYXRhICYgflBBR0VfTUFTSyk7DQo+PiArICAgICAgICAgICAg ICAgcmV0dXJuIHJldDsNCj4+DQo+PiAtICAgICAgIGlmIChyZXQgPj0gMCAmJiAoZmlsZS0+Zl9m bGFncyAmIE9fRElSRUNUKSA9PSAwKQ0KPj4gLSAgICAgICAgICAgICAgIHJldCA9IGNlcGhfY29w eV9wYWdlX3ZlY3Rvcl90b191c2VyKHBhZ2VzLCBkYXRhLCBvZmYsIHJldCk7DQo+PiAtICAgICAg IGlmIChyZXQgPj0gMCkNCj4+IC0gICAgICAgICAgICAgICAqcG9mZiA9IG9mZiArIHJldDsNCj4+ ICsgICAgICAgaWYgKGZpbGUtPmZfZmxhZ3MgJiBPX0RJUkVDVCkgew0KPj4gKyAgICAgICAgICAg ICAgIHdoaWxlIChpb3ZfaXRlcl9jb3VudChpKSkgew0KPj4gKyAgICAgICAgICAgICAgICAgICAg ICAgdm9pZCBfX3VzZXIgKmRhdGEgPSBpLT5pb3ZbMF0uaW92X2Jhc2UgKyBpLT5pb3Zfb2Zmc2V0 Ow0KPj4gKyAgICAgICAgICAgICAgICAgICAgICAgc2l6ZV90IGxlbiA9IGktPmlvdlswXS5pb3Zf bGVuIC0gaS0+aW92X29mZnNldDsNCj4+ICsNCj4+ICsgICAgICAgICAgICAgICAgICAgICAgIG51 bV9wYWdlcyA9IGNhbGNfcGFnZXNfZm9yKCh1bnNpZ25lZCBsb25nKWRhdGEsIGxlbik7DQo+PiAr ICAgICAgICAgICAgICAgICAgICAgICBwYWdlcyA9IGNlcGhfZ2V0X2RpcmVjdF9wYWdlX3ZlY3Rv cihkYXRhLA0KPj4gKyAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgbnVtX3BhZ2VzLCB0cnVlKTsNCj4+ICsgICAgICAgICAgICAgICAgICAg ICAgIGlmIChJU19FUlIocGFnZXMpKQ0KPj4gKyAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICByZXR1cm4gUFRSX0VSUihwYWdlcyk7DQo+PiArDQo+PiArICAgICAgICAgICAgICAgICAgICAg ICByZXQgPSBzdHJpcGVkX3JlYWQoaW5vZGUsIG9mZiwgbGVuLA0KPj4gKyAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgIHBhZ2VzLCBudW1fcGFnZXMsIGNoZWNrZW9mLA0K Pj4gKyAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIDEsICh1bnNpZ25l ZCBsb25nKWRhdGEgJiB+UEFHRV9NQVNLKTsNCj4+ICsgICAgICAgICAgICAgICAgICAgICAgIGNl cGhfcHV0X3BhZ2VfdmVjdG9yKHBhZ2VzLCBudW1fcGFnZXMsIHRydWUpOw0KPj4gKw0KPj4gKyAg ICAgICAgICAgICAgICAgICAgICAgaWYgKHJldCA8PSAwKQ0KPj4gKyAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICBicmVhazsNCj4+ICsgICAgICAgICAgICAgICAgICAgICAgIG9mZiArPSBy ZXQ7DQo+PiArICAgICAgICAgICAgICAgICAgICAgICBpb3ZfaXRlcl9hZHZhbmNlKGksIHJldCk7 DQo+PiArICAgICAgICAgICAgICAgICAgICAgICBpZiAocmV0IDwgbGVuKQ0KPj4gKyAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICBicmVhazsNCj4+ICsgICAgICAgICAgICAgICB9DQo+PiAr ICAgICAgIH0gZWxzZSB7DQo+PiArICAgICAgICAgICAgICAgc2l6ZV90IGxlbiA9IGlvY2ItPmtp X2xlZnQ7DQo+Pg0KPj4gLWRvbmU6DQo+PiAtICAgICAgIGlmIChmaWxlLT5mX2ZsYWdzICYgT19E SVJFQ1QpDQo+PiAtICAgICAgICAgICAgICAgY2VwaF9wdXRfcGFnZV92ZWN0b3IocGFnZXMsIG51 bV9wYWdlcywgdHJ1ZSk7DQo+PiAtICAgICAgIGVsc2UNCj4+ICsgICAgICAgICAgICAgICBudW1f cGFnZXMgPSBjYWxjX3BhZ2VzX2ZvcihvZmYsIGxlbik7DQo+PiArICAgICAgICAgICAgICAgcGFn ZXMgPSBjZXBoX2FsbG9jX3BhZ2VfdmVjdG9yKG51bV9wYWdlcywgR0ZQX05PRlMpOw0KPj4gKyAg ICAgICAgICAgICAgIGlmIChJU19FUlIocGFnZXMpKQ0KPj4gKyAgICAgICAgICAgICAgICAgICAg ICAgcmV0dXJuIFBUUl9FUlIocGFnZXMpOw0KPj4gKyAgICAgICAgICAgICAgIHJldCA9IHN0cmlw ZWRfcmVhZChpbm9kZSwgb2ZmLCBsZW4sIHBhZ2VzLA0KPj4gKyAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgIG51bV9wYWdlcywgY2hlY2tlb2YsIDAsIDApOw0KPj4gKyAgICAg ICAgICAgICAgIGlmIChyZXQgPiAwKSB7DQo+PiArICAgICAgICAgICAgICAgICAgICAgICBpbnQg bCwgayA9IDA7DQo+PiArICAgICAgICAgICAgICAgICAgICAgICBzaXplX3QgbGVmdCA9IGxlbiA9 IHJldDsNCj4+ICsNCj4+ICsgICAgICAgICAgICAgICAgICAgICAgIHdoaWxlIChsZWZ0KSB7DQo+ PiArICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIHZvaWQgX191c2VyICpkYXRhID0gaS0+ aW92WzBdLmlvdl9iYXNlDQo+PiArICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICsgaS0+aW92X29mZnNldDsNCj4+ICsgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgbCA9IG1pbihpLT5pb3ZbMF0uaW92X2xlbiAtIGktPmlvdl9vZmZzZXQs DQo+PiArICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgbGVmdCk7DQo+PiAr DQo+PiArICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIHJldCA9IGNlcGhfY29weV9wYWdl X3ZlY3Rvcl90b191c2VyKCZwYWdlc1trXSwNCj4+ICsgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgZGF0YSwgb2ZmLA0KPj4g KyAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICBsKTsNCj4+ICsgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgaWYgKHJl dCA+IDApIHsNCj4+ICsgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICBpb3Zf aXRlcl9hZHZhbmNlKGksIHJldCk7DQo+PiArICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgbGVmdCAtPSByZXQ7DQo+PiArICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgb2ZmICs9IHJldDsNCj4+ICsgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICBrID0gY2FsY19wYWdlc19mb3IoaW9jYi0+a2lfcG9zLA0KPj4gKyAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICBsZW4gLSBsZWZ0 ICsgMSkgLSAxOw0KPj4gKyAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIEJV R19PTihrID49IG51bV9wYWdlcyAmJiBsZWZ0KTsNCj4+ICsgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgfSBlbHNlDQo+PiArICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgYnJlYWs7DQo+PiArICAgICAgICAgICAgICAgICAgICAgICB9DQo+PiArICAgICAgICAgICAg ICAgfQ0KPj4gICAgICAgICAgICAgICAgIGNlcGhfcmVsZWFzZV9wYWdlX3ZlY3RvcihwYWdlcywg bnVtX3BhZ2VzKTsNCj4+ICsgICAgICAgfQ0KPj4gKw0KPj4gKyAgICAgICBpZiAob2ZmID4gaW9j Yi0+a2lfcG9zKSB7DQo+PiArICAgICAgICAgICAgICAgcmV0ID0gb2ZmIC0gaW9jYi0+a2lfcG9z Ow0KPj4gKyAgICAgICAgICAgICAgIGlvY2ItPmtpX3BvcyA9IG9mZjsNCj4+ICsgICAgICAgICAg ICAgICBpb2NiLT5raV9sZWZ0IC09IHJldDsNCj4+ICsgICAgICAgfQ0KPj4gKw0KPj4gICAgICAg ICBkb3V0KCJzeW5jX3JlYWQgcmVzdWx0ICVkXG4iLCByZXQpOw0KPj4gICAgICAgICByZXR1cm4g cmV0Ow0KPj4gIH0NCj4+IEBAIC02NDcsNTUgKzY5MCw2NyBAQCBzdGF0aWMgc3NpemVfdCBjZXBo X2Fpb19yZWFkKHN0cnVjdCBraW9jYiAqaW9jYiwgY29uc3Qgc3RydWN0IGlvdmVjICppb3YsDQo+ PiAgew0KPj4gICAgICAgICBzdHJ1Y3QgZmlsZSAqZmlscCA9IGlvY2ItPmtpX2ZpbHA7DQo+PiAg ICAgICAgIHN0cnVjdCBjZXBoX2ZpbGVfaW5mbyAqZmkgPSBmaWxwLT5wcml2YXRlX2RhdGE7DQo+ PiAtICAgICAgIGxvZmZfdCAqcHBvcyA9ICZpb2NiLT5raV9wb3M7DQo+PiAtICAgICAgIHNpemVf dCBsZW4gPSBpb3YtPmlvdl9sZW47DQo+PiArICAgICAgIHNpemVfdCBsZW4gPSAwOw0KPj4gICAg ICAgICBzdHJ1Y3QgaW5vZGUgKmlub2RlID0gZmlsZV9pbm9kZShmaWxwKTsNCj4+ICAgICAgICAg c3RydWN0IGNlcGhfaW5vZGVfaW5mbyAqY2kgPSBjZXBoX2lub2RlKGlub2RlKTsNCj4+IC0gICAg ICAgdm9pZCBfX3VzZXIgKmJhc2UgPSBpb3YtPmlvdl9iYXNlOw0KPj4gICAgICAgICBzc2l6ZV90 IHJldDsNCj4+ICAgICAgICAgaW50IHdhbnQsIGdvdCA9IDA7DQo+PiAgICAgICAgIGludCBjaGVj a2VvZiA9IDAsIHJlYWQgPSAwOw0KPj4NCj4+ICAgICAgICAgZG91dCgiYWlvX3JlYWQgJXAgJWxs eC4lbGx4ICVsbHV+JXUgdHJ5aW5nIHRvIGdldCBjYXBzIG9uICVwXG4iLA0KPj4gICAgICAgICAg ICAgIGlub2RlLCBjZXBoX3Zpbm9wKGlub2RlKSwgcG9zLCAodW5zaWduZWQpbGVuLCBpbm9kZSk7 DQo+PiAtYWdhaW46DQo+PiArDQo+PiArICAgICAgIHJldCA9IGdlbmVyaWNfc2VnbWVudF9jaGVj a3MoaW92LCAmbnJfc2VncywgJmxlbiwgVkVSSUZZX1dSSVRFKTsNCj4+ICsgICAgICAgaWYgKHJl dCkNCj4+ICsgICAgICAgICAgICAgICByZXR1cm4gcmV0Ow0KPj4gKw0KPj4gICAgICAgICBpZiAo ZmktPmZtb2RlICYgQ0VQSF9GSUxFX01PREVfTEFaWSkNCj4+ICAgICAgICAgICAgICAgICB3YW50 ID0gQ0VQSF9DQVBfRklMRV9DQUNIRSB8IENFUEhfQ0FQX0ZJTEVfTEFaWUlPOw0KPj4gICAgICAg ICBlbHNlDQo+PiAgICAgICAgICAgICAgICAgd2FudCA9IENFUEhfQ0FQX0ZJTEVfQ0FDSEU7DQo+ PiAgICAgICAgIHJldCA9IGNlcGhfZ2V0X2NhcHMoY2ksIENFUEhfQ0FQX0ZJTEVfUkQsIHdhbnQs ICZnb3QsIC0xKTsNCj4+ICAgICAgICAgaWYgKHJldCA8IDApDQo+PiAtICAgICAgICAgICAgICAg Z290byBvdXQ7DQo+PiArICAgICAgICAgICAgICAgcmV0dXJuIHJldDsNCj4+ICsNCj4+ICAgICAg ICAgZG91dCgiYWlvX3JlYWQgJXAgJWxseC4lbGx4ICVsbHV+JXUgZ290IGNhcCByZWZzIG9uICVz XG4iLA0KPj4gICAgICAgICAgICAgIGlub2RlLCBjZXBoX3Zpbm9wKGlub2RlKSwgcG9zLCAodW5z aWduZWQpbGVuLA0KPj4gICAgICAgICAgICAgIGNlcGhfY2FwX3N0cmluZyhnb3QpKTsNCj4+DQo+ PiAgICAgICAgIGlmICgoZ290ICYgKENFUEhfQ0FQX0ZJTEVfQ0FDSEV8Q0VQSF9DQVBfRklMRV9M QVpZSU8pKSA9PSAwIHx8DQo+PiAgICAgICAgICAgICAoaW9jYi0+a2lfZmlscC0+Zl9mbGFncyAm IE9fRElSRUNUKSB8fA0KPj4gLSAgICAgICAgICAgKGZpLT5mbGFncyAmIENFUEhfRl9TWU5DKSkN Cj4+ICsgICAgICAgICAgIChmaS0+ZmxhZ3MgJiBDRVBIX0ZfU1lOQykpIHsNCj4+ICsgICAgICAg ICAgICAgICBzdHJ1Y3QgaW92X2l0ZXIgaTsNCj4+ICsNCj4+ICsgICAgICAgICAgICAgICBpb2Ni LT5raV9sZWZ0ID0gbGVuOw0KPj4gKyAgICAgICAgICAgICAgIGlvdl9pdGVyX2luaXQoJmksIGlv diwgbnJfc2VncywgbGVuLCAwKTsNCj4+ICthZ2FpbjoNCj4+ICAgICAgICAgICAgICAgICAvKiBo bW0sIHRoaXMgaXNuJ3QgcmVhbGx5IGFzeW5jLi4uICovDQo+PiAtICAgICAgICAgICAgICAgcmV0 ID0gY2VwaF9zeW5jX3JlYWQoZmlscCwgYmFzZSwgbGVuLCBwcG9zLCAmY2hlY2tlb2YpOw0KPj4g LSAgICAgICBlbHNlDQo+PiArICAgICAgICAgICAgICAgcmV0ID0gY2VwaF9zeW5jX3JlYWQoaW9j YiwgJmksICZjaGVja2VvZik7DQo+PiArDQo+PiArICAgICAgICAgICAgICAgaWYgKGNoZWNrZW9m ICYmIHJldCA+PSAwKSB7DQo+PiArICAgICAgICAgICAgICAgICAgICAgICBpbnQgc3RhdHJldCA9 IGNlcGhfZG9fZ2V0YXR0cihpbm9kZSwNCj4+ICsgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgIENFUEhfU1RBVF9DQVBfU0laRSk7DQo+DQo+SXQncyB3 cm9uZyB0byBtb3ZlIGdldGF0dHIgdG8gaGVyZS4gYmVjYXVzZSBnZXRhdHRyIHdoaWxlIGhvbGRp bmcgRnINCj5jYXAgY2FuIGNhdXNlIGhhbmcuDQo+DQo+UmVnYXJkcw0KPllhbiwgWmhlbmcNCj4N CkhpLA0KCUNhbiB5b3UgZXhwbGFpbiBpbiBkZXRhaWw/DQoNClRoYW5rcyENCkppYW5wZW5nIE1h