From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ian Jackson Subject: Re: [PATCH 8/9] libxl: Kill QEMU by uid when possible Date: Wed, 28 Nov 2018 16:56:24 +0000 Message-ID: <23550.51384.89698.110737@mariner.uk.xensource.com> References: <20181123171502.29519-1-george.dunlap@citrix.com> <20181123171502.29519-8-george.dunlap@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1gS397-0002gk-Ti for xen-devel@lists.xenproject.org; Wed, 28 Nov 2018 16:57:05 +0000 In-Reply-To: <20181123171502.29519-8-george.dunlap@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: George Dunlap Cc: Anthony Perard , xen-devel@lists.xenproject.org, Wei Liu List-Id: xen-devel@lists.xenproject.org R2VvcmdlIER1bmxhcCB3cml0ZXMgKCJbUEFUQ0ggOC85XSBsaWJ4bDogS2lsbCBRRU1VIGJ5IHVp ZCB3aGVuIHBvc3NpYmxlIik6Cj4gVGhlIHByaXZjbWQgZmQgdGhhdCBhIGRtX3Jlc3RyaWN0J2Vk IFFFTVUgaGFzIGdpdmVzIGl0IHBlcm1pc3Npb24gdG8KPiBvbmUgc3BlY2lmaWMgZG9tYWluIElE LiAgVGhpcyBkb21haW4gSUQgd2lsbCBwcm9iYWJseSBldmVudHVhbGx5IGJlCj4gdXNlZCBhZ2Fp bi4gIEl0IGlzIHRoZXJlZm9yZSBuZWNlc3NhcnkgdG8gbWFrZSBhYnNvbHV0ZWx5IHN1cmUgdGhh dCBhCj4gcm9ndWUgUUVNVSBwcm9jZXNzIGNhbm5vdCBoYW5nIGFyb3VuZCBhZnRlciBpdHMgZG9t YWluIGhhcyBleGl0ZWQuCgpUaGFua3MuICBUaGlzIGxvb2tzIHJvdWdobHkgcmlnaHQgYnV0IEkg aGF2ZSBzb21lIGNvZGluZyBzdHlsZQpxdWliYmxlcywgYW5kIEkgYW0gbm90IGNvbnZpbmNlZCB0 aGUgZXJyb3IgaGFuZGxpbmcgaXMgcmlnaHQuCiAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAKPiBAQCAtMjM4Miw2ICsyMzg5LDE1IEBAIHZvaWQgbGlieGxfX3NwYXduX2xvY2FsX2Rt KGxpYnhsX19lZ2MgKmVnYywgbGlieGxfX2RtX3NwYXduX3N0YXRlICpkbXNzKQo+ICAKPiAgICAg IGNvbnN0IGNoYXIgKmRvbV9wYXRoID0gbGlieGxfX3hzX2dldF9kb21wYXRoKGdjLCBkb21pZCk7 Cj4gIAo+ICsgICAgLyogCj4gKyAgICAgKiBJZiB3ZSdyZSBzdGF0aW5nIHRoZSBkbSB3aXRoIGEg bm9uLXJvb3QgVUlELCBzYXZlIHRoZSBVSUQgc28KClR5cG8gZm9yIGBzdGFydGluZycuCgo+ICsg ICAgICogdGhhdCB3ZSBjYW4gcmVsaWFibHkga2lsbCBpdCBhbmQgYW55IHN1YnByb2Nlc3Nlcwo+ ICsgICAgICovCi4uLgo+ICtzdGF0aWMgdm9pZCBraWxsX2RldmljZV9tb2RlbF91aWRfY2IobGli eGxfX2VnYyAqZWdjLAo+ICsgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgbGli eGxfX2V2X2NoaWxkICpkZXN0cm95ZXIsCj4gKyAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICBwaWRfdCBwaWQsIGludCBzdGF0dXMpOwo+ICsKPiAgdm9pZCBsaWJ4bF9fZGVzdHJv eV9kZXZpY2VfbW9kZWwobGlieGxfX2VnYyAqZWdjLAo+ICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICBsaWJ4bF9fZGVzdHJveV9kZXZpY2Vtb2RlbF9zdGF0ZSAqZGRtcykKPiAgewo+ IEBAIC0yNjU4LDE1ICsyNjc4LDEwMyBAQCB2b2lkIGxpYnhsX19kZXN0cm95X2RldmljZV9tb2Rl bChsaWJ4bF9fZWdjICplZ2MsCj4gICAgICBpbnQgcmM7Cj4gICAgICBpbnQgZG9taWQgPSBkZG1z LT5kb21pZDsKPiAgICAgIGNoYXIgKnBhdGggPSBERVZJQ0VfTU9ERUxfWFNfUEFUSChnYywgTElC WExfVE9PTFNUQUNLX0RPTUlELCBkb21pZCwgIiIpOwo+ICsgICAgY29uc3QgY2hhciAqIGRtX3Vp ZF9zdHI7Cj4gKyAgICB1aWRfdCBkbV91aWQ7Cj4gKyAgICBpbnQgcmVhcGVyX3BpZDsKPiArICAg IGludCByZXQ7Cj4gICAgICAKPiAgICAgIGlmICgheHNfcm0oQ1RYLT54c2gsIFhCVF9OVUxMLCBw YXRoKSkKPiAgICAgICAgICBMT0dEKEVSUk9SLCBkb21pZCwgInhzX3JtIGZhaWxlZCBmb3IgJXMi LCBwYXRoKTsKPiAgICAgIAo+IC0gICAgLyogV2Ugc2hvdWxkIHRyeSB0byBkZXN0cm95IHRoZSBk ZXZpY2UgbW9kZWwgYW55d2F5LiAqLwo+IC0gICAgcmMgPSBraWxsX2RldmljZV9tb2RlbChnYywK PiAtICAgICAgICAgICAgICBHQ1NQUklOVEYoIi9sb2NhbC9kb21haW4vJWQvaW1hZ2UvZGV2aWNl LW1vZGVsLXBpZCIsIGRvbWlkKSk7Cj4gKyAgICAvKiAKPiArICAgICAqIFdlIHNob3VsZCB0cnkg dG8gZGVzdHJveSB0aGUgZGV2aWNlIG1vZGVsIGFueXdheS4gIENoZWNrIHRvIHNlZQo+ICsgICAg ICogaWYgd2UgY2FuIGtpbGwgYnkgVUlECj4gKyAgICAgKi8KPiArICAgIHJldCA9IGxpYnhsX194 c19yZWFkX2NoZWNrZWQoZ2MsIFhCVF9OVUxMLAo+ICsgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgIEdDU1BSSU5URigiL2xvY2FsL2RvbWFpbi8lZC9pbWFnZS9kZXZpY2UtbW9kZWwtdWlk IiwKPiArICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIGRvbWlkKSwK PiArICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgJmRtX3VpZF9zdHIpOwoKSSBrbm93 IHRoaXMgZnVuY3Rpb24gaXMgYmFkIGluIGl0cyB1c2Ugb2YgYHJjJyBmb3Igc3lzY2FsbCByZXR1 cm4gYnV0CnBsZWFzZSBkb24ndCBtYWtlIGl0IHdvcnNlIGJ5IGludHJvZHVjaW5nIGByZXQnIGZv ciB3aGF0IHNob3VsZCBiZQpgcmMnLiAgV291bGQgeW91IG1pbmQgYWRkaW5nIGEgcHJlLXBhdGNo IHRvIGNoYW5nZSBgcmMnIHRvIGByJyBhbmQKdGhlbiB5b3UgY2FuIHVzZSBgcmMnID8KCj4gKyAg ICBpZiAocmV0IHx8ICFkbV91aWRfc3RyKSB7CgpTaG91bGRuJ3Qgd2UgZmFpbCBpZiBsaWJ4bF9f eHNfcmVhZF9jaGVja2VkIGZhaWxzID8KT3RoZXJ3aXNlIHdlIHJpc2sgbGVhdmluZyBmcmFnbWVu dHMgb2YgZG9tYWluIGJlaGluZCBldmVuIGlmIHdlIGZhaWwuCihQb3NzaWJseSB3ZSBzaG91bGQg Y2Fycnkgb24sIGJ1dCBhY2N1bXVsYXRlIGVycm9ycyBpbiByYy4pCgo+ICsgICAgICAgIC8qIE5v IHVpZCBpbiB4ZW5zdG9yZTsganVzdCBraWxsIHRoZSBwaWQgd2UgaGF2ZSAqLwo+ICsgICAgICAg IExPR0QoREVCVUcsIGRvbWlkLCAiRGlkbid0IGZpbmQgZG0gVUlEOyBkZXN0cm95aW5nIGJ5IHBp ZCIpOwo+ICsgICAgICAgIAo+ICsgICAgICAgIHJjID0ga2lsbF9kZXZpY2VfbW9kZWwoZ2MsCj4g KyAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICBHQ1NQUklOVEYoIi9sb2NhbC9kb21haW4v JWQvaW1hZ2UvZGV2aWNlLW1vZGVsLXBpZCIsIGRvbWlkKSk7Cj4gKyAgICAKPiArICAgICAgICBs aWJ4bF9fcW1wX2NsZWFudXAoZ2MsIGRvbWlkKTsKPiArCj4gKyAgICAgICAgZGRtcy0+Y2FsbGJh Y2soZWdjLCBkZG1zLCByYyk7Cj4gKyAgICAgICAgcmV0dXJuOwoKQ2FuIHlvdSBwbGVhc2UgYnJl YWsgb3V0IHRoaXMgbGl0dGxlIGV4aXQgY29kZSBmcmFnbWVudAoKICArICAgICAgICBsaWJ4bF9f cW1wX2NsZWFudXAoZ2MsIGRvbWlkKTsKICArICAgICAgICBkZG1zLT5jYWxsYmFjayhlZ2MsIGRk bXMsIHJjKTsKCmludG8gYSBzdWItZnVuY3Rpb24gPyAgSXQgb2NjdXJzIHR3aWNlIGFuZCBpdCBp cyBlYXNpZXIgdG8gcmVhc29uCmFib3V0IHRoaW5ncyBpZiB0aGUgb3BlcmF0aW9uIGhhcyBhIHNp bmdsZSBleGl0IHBhdGguCgo+ICsgICAgLyogUUVNVSBoYXMgaXRzIG93biB1aWQ7IGtpbGwgYWxs IHByb2Nlc3NlcyB3aXRoIHRoYXQgVUlEICovCj4gKyAgICBMT0dEKERFQlVHLCBkb21pZCwgIkZv dW5kIERNIHVpZCAlcywgZGVzdHJveWluZyBieSB1aWQiLCBkbV91aWRfc3RyKTsKPiArICAgIAo+ ICsgICAgZG1fdWlkID0gYXRvaShkbV91aWRfc3RyKTsKCkkgYW0gdGVtcHRlZCB0byBzdWdnZXN0 IGEgbW9yZSByb2J1c3QgdXNlIG9mIHN0cnRvdWwgaGVyZSBidXQgc2luY2UKdGhpcyBjYW1lIGZy b20gb3VyIG93biB4ZW5zdG9yZSBub2RlLCBmaW5lLgoKPiArICAgIHJlYXBlcl9waWQgPSBsaWJ4 bF9fZXZfY2hpbGRfZm9yayhnYywgJmRkbXMtPmRlc3Ryb3llciwKPiArICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICBraWxsX2RldmljZV9tb2RlbF91aWRfY2IpOwo+ICsgICAg aWYgKHJlYXBlcl9waWQgPCAwKQo+ICsgICAgICAgIGRkbXMtPmNhbGxiYWNrKGVnYywgZGRtcywg RVJST1JfRkFJTCk7Cj4gKyAgICB9Cj4gKwoKQW5kLCB2b2lsYSEgIERpZG4ndCB5b3UgbWVhbiB0 byBjYWxsIGxpYnhsX19xbXBfY2xlYW51cCA/ICBZb3UncmUKbWlzc2luZyB0aGUgZXhpdCBwYXRo LiAgQW5kIG1heWJlIHRoZSBjYWxsIHRvIGl0IHNob3VsZCBiZSBhbiBgb3V0JwpibG9jayBpbiB0 aGlzIGZ1bmN0aW9uLgoKQWxzbywgYW1hemluZ2x5LCB5b3UgZG9uJ3QgcmV0dXJuIG9yIGFueXRo aW5nIGhlcmUuICBUaGlzIGlzIG9ubHkgbm90CmEgYnVnIGJlY2F1c2UgdGhlIHJlc3QgaXMgYWxs IHRoZSBjaGlsZCBwcm9jZXNzLgoKPiArICAgIGlmICghcmVhcGVyX3BpZCkgeyAvKiBjaGlsZCAq Lwo+ICsgICAgICAgIGNvbnN0IGNoYXIgKiBjYWxsOwo+ICsKPiArICAgICAgICAvKiAKPiArICAg ICAgICAgKiBGSVhNRTogdGhlIHNlY29uZCB1aWQgbmVlZHMgdG8gYmUgZGlzdGluY3QgdG8gYXZv aWQgYmVpbmcKPiArICAgICAgICAgKiBraWxsZWQgYnkgYSBwb3RlbnRpYWwgcm9ndWUgcHJvY2Vz cwo+ICsgICAgICAgICAqLwoKVGhpcyBpcyBhIGJpdCBvZiBhIGZ1bm55IHdheSBvZiBpbnRyb2R1 Y2luZyB0aGlzIGJ1dCBmaW5lLgoKPiArICAgICAgICByZXQgPSBzZXRyZXN1aWQoZG1fdWlkLCBk bV91aWQsIDApOwo+ICsgICAgICAgIGlmIChyZXQpIHsKPiArICAgICAgICAgICAgY2FsbCA9ICJz ZXRyZXN1aWQiOwo+ICsgICAgICAgICAgICBnb3RvIGJhZGNoaWxkOwo+ICsgICAgICAgIH0KPiAr Cj4gKyAgICAgICAgLyogQW5kIGtpbGwgZXZlcnlvbmUgYnV0IG1lICovCj4gKyAgICAgICAgcmV0 ID0ga2lsbCgtMSwgOSk7Cj4gKyAgICAgICAgaWYgKHJldCkgewo+ICsgICAgICAgICAgICBjYWxs ID0gImtpbGwiOwo+ICsgICAgICAgICAgICBnb3RvIGJhZGNoaWxkOwo+ICsgICAgICAgIH0KPiAr ICAgICAgICBfZXhpdCgwKTsKPiArICAgICAgICAKPiArICAgIGJhZGNoaWxkOgo+ICsgICAgICAg IGlmIChlcnJubyA+IDAgICYmIGVycm5vIDwgMTI2KSB7Cj4gKyAgICAgICAgICAgIF9leGl0KGVy cm5vKTsKPiArICAgICAgICB9IGVsc2Ugewo+ICsgICAgICAgICAgICBMT0dFRChFUlJPUiwgZG9t aWQsCj4gKyAgICAgICAgICAgICAgICAgICJDYWxsICVzIGZhaWxlZCAod2l0aCBkaWZmaWN1bHQg ZXJybm8gdmFsdWUgJWQpIiwKPiArICAgICAgICAgICAgICAgICAgY2FsbCwgZXJybm8pOwo+ICsg ICAgICAgICAgICBfZXhpdCgtMSk7Cj4gKyAgICAgICAgfQo+ICsgICAgfQoKSSBkb24ndCBtdWNo IGxpa2UgdGhlc2UgZ290b3MgZWl0aGVyLiAgTWF5YmUgYSBzdWJmdW5jdGlvbiBpcyBjYWxsZWQK Zm9yLgoKRnVydGhlcm1vcmUsIG9uY2UgYWdhaW4gcGxlYXNlIHNlZSBDT0RJTkdfU1RZTEUgcmUg Y29udmVudGlvbmFsCnZhcmlhYmxlIG5hbWVzIGByJyBhbmQgYHJjJ8K3Cgo+ICtvdXQ6Cj4gKyAg ICBsaWJ4bF9fcW1wX2NsZWFudXAoZ2MsIGRkbXMtPmRvbWlkKTsKCj4gICAgICBkZG1zLT5jYWxs YmFjayhlZ2MsIGRkbXMsIHJjKTsKCkhlcmUncyB0aGF0IGZpbmlzaCBmcmFnbWVudCBhZ2Fpbi4K Cj4gaW5kZXggODk5YTg2ZTg0Yi4uNTllYWMwNjYyYSAxMDA2NDQKPiAtLS0gYS90b29scy9saWJ4 bC9saWJ4bF9pbnRlcm5hbC5oCj4gKysrIGIvdG9vbHMvbGlieGwvbGlieGxfaW50ZXJuYWwuaAo+ IEBAIC0xMTM1LDcgKzExMzUsNyBAQCB0eXBlZGVmIHN0cnVjdCB7Cj4gICAgICBjb25zdCBjaGFy ICogc2hpbV9jbWRsaW5lOwo+ICAgICAgY29uc3QgY2hhciAqIHB2X2NtZGxpbmU7Cj4gIAo+IC0g ICAgY2hhciAqIGRtX3J1bmFzOwo+ICsgICAgY2hhciAqIGRtX3J1bmFzLCAgKmRtX3VpZDsKCkl0 IHdvdWxkIGJlIG5pY2UgdG8gZHJvcCB0aGUgc3B1cmlvdXMgc3BhY2UgYmVmb3JlIGRtX3J1bmFz IHdoaWxlIHlvdQphcmUgaGVyZSwgYW5kIHRoZW4gcHJlc3VtYWJseSB0aGUgZG91YmxlIHNwYWNl IGJlZm9yZSAqZG1fdWlkIHdvdWxkCm5vdCBiZSBuZWVkZWQuCgpUaGFua3MsCklhbi4KCl9fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWls aW5nIGxpc3QKWGVuLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMueGVu cHJvamVjdC5vcmcvbWFpbG1hbi9saXN0aW5mby94ZW4tZGV2ZWw=