Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932493AbbDVOGJ (ORCPT ); Wed, 22 Apr 2015 10:06:09 -0400 Received: from mail-ig0-f182.google.com ([209.85.213.182]:37227 "EHLO mail-ig0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754498AbbDVOGH (ORCPT ); Wed, 22 Apr 2015 10:06:07 -0400 Message-ID: <5537AABE.9010506@gmail.com> Date: Wed, 22 Apr 2015 10:05:50 -0400 From: Austin S Hemmelgarn User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 MIME-Version: 1.0 To: Greg Kroah-Hartman CC: Linus Torvalds , Andy Lutomirski , "Eric W. Biederman" , Andrew Morton , Arnd Bergmann , One Thousand Gnomes , Tom Gundersen , Jiri Kosina , Linux Kernel Mailing List , Daniel Mack , David Herrmann , Djalal Harouni Subject: Re: Issues with capability bits and meta-data in kdbus References: <20150413190350.GA9485@kroah.com> <8738434yjk.fsf@x220.int.ebiederm.org> <87lhhv36je.fsf@x220.int.ebiederm.org> <20150414175534.GB3974@kroah.com> <87oamhmbso.fsf_-_@x220.int.ebiederm.org> <553788A9.6090006@gmail.com> <20150422130739.GA29286@kroah.com> In-Reply-To: <20150422130739.GA29286@kroah.com> x-hashcash: 1:21:150422:gregkh@linuxfoundation.org::97fb242db6190502bd538fb47d73f17:1f8bcf2470d9df4d x-hashcash: 1:21:150422:torvalds@linux-foundation.org::f6ac3169118b60db86d12a4c18608e87:ba5b25709d5cd9b4 x-hashcash: 1:21:150422:luto@amacapital.net::4e12532444fbdaa49ada5cc17a5438a6:bbe8076f3b1993fa x-hashcash: 1:21:150422:ebiederm@xmission.com::f87158035cb6990670f6af2e3a8f6031:643366139272989e x-hashcash: 1:21:150422:akpm@linux-foundation.org::e199cd7468382919f711baab5364ae69:ee86956029a66ff5 x-hashcash: 1:21:150422:arnd@arndb.de::27ec3ca97c0f57225a608518a9876585:3e15372e2620b649 x-hashcash: 1:21:150422:gnomes@lxorguk.ukuu.org.uk::9f02d9ead7885fe496849817ad009168:33a4423b0e7190e4 x-hashcash: 1:21:150422:teg@jklm.no::992ab07b5d4b4160a7ffc440aa06d8a:42b3353b5e0a1c5c x-hashcash: 1:21:150422:jkosina@suse.cz::90a367249a28861f893f918ef1939b1f:2bc3b8b34bf85312 x-hashcash: 1:21:150422:linux-kernel@vger.kernel.org::41573910856d2f643d210c791b42869:9b5d2c1043f96f47 x-hashcash: 1:21:150422:daniel@zonque.org::66765b90568c58e22bc8481ed53d9dbf:89cc7c6d93a54dfc x-hashcash: 1:21:150422:dh.herrmann@gmail.com::81caae5ec6b1501523a8f6b97002d6f8:71c50f79d14996d5 x-hashcash: 1:21:150422:tixxdz@opendz.org::4e30cdedd37f7b35f0a1b1273203e297:4cd791c3383bb753 x-stampprotocols: hashcash:1:17;mbound:0:10:3000:5000 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha1; boundary="------------ms060904040706010200080807" X-Antivirus: avast! (VPS 150421-1, 2015-04-21), Outbound message X-Antivirus-Status: Clean Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6446 Lines: 117 This is a cryptographically signed message in MIME format. --------------ms060904040706010200080807 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: quoted-printable On 2015-04-22 09:07, Greg Kroah-Hartman wrote: > On Wed, Apr 22, 2015 at 07:40:25AM -0400, Austin S Hemmelgarn wrote: >> On 2015-04-21 22:32, Linus Torvalds wrote: >>> On Tue, Apr 21, 2015 at 6:54 PM, Andy Lutomirski wrote: >>>> >>>> If kdbus were a general purpose IPC tool >>> >>> .. but it's not .. >>> >> >> Except, IIRC, that was one of the stated design goals in the original = patch >> set. I'm pretty sure that i remember a rather verbose exposition that= >> pretty much could be summarized as "Linux has no general purpose IPC i= n the >> kernel, this fixes that" > > Did I say that somewhere? Here's what the patchset has always started > with every time I have posted it for review, starting back last year in= > October: > > kdbus is a kernel-level IPC implementation that aims for > resemblance to the the protocol layer with the existing > userspace D-Bus daemon while enabling some features that > couldn't be implemented before in userspace. > > 2+ years ago, I had the dream that maybe we could make kdbus into the > "general purpose IPC layer for the kernel", but in working through all > of the issues, and the requirements of the userspace users and > protocols, it just really didn't work out that way, sorry. > I think it may have been someone else elaborating on this ideal that I=20 was remembering. Personally, I could care less whether it is considered = 'general purpose', as far as I'm concerned, POSIX semaphores, shm, and=20 UDS fit all the IPC I ever need. On that note, I have considered trying = to implement SOCK_SEQPACKET support for AF_LOCAL, although I've gotten=20 by just fine using SCTP over the loop-back interface. --------------ms060904040706010200080807 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIGuDCC BrQwggScoAMCAQICAxBuVTANBgkqhkiG9w0BAQ0FADB5MRAwDgYDVQQKEwdSb290IENBMR4w HAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNBIENlcnQgU2lnbmlu ZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRAY2FjZXJ0Lm9yZzAeFw0xNTAz MjUxOTM0MzhaFw0xNTA5MjExOTM0MzhaMGMxGDAWBgNVBAMTD0NBY2VydCBXb1QgVXNlcjEj MCEGCSqGSIb3DQEJARYUYWhmZXJyb2luN0BnbWFpbC5jb20xIjAgBgkqhkiG9w0BCQEWE2Fo ZW1tZWxnQG9oaW9ndC5jb20wggIiMA0GCSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQCdD/zW 2rRAFCLnDfXpWxU1+ODqRVUgzHvrRO7ADUxRo1CBDc3JSX5TIW2OGmQ3DAKGOACp8Z0sgxMc B05tzAZ/M7m4jajVrwwdVCdrwVGxTdAai7Kwg4ZCVfyMVhcwo8R2eW3QahBx34G0RKumK9sZ ZQSQ+zULAzpY6uz7T1sAk/erMoivRXF6u8WvOsLkOD1F/Xyv1ZccSUG5YeDgZgc0nZUBvyIp zXSHjgWerFkrxEM3y2z/Ff3eL1sgGYecV/I1F+I5S01V7Kclt/qRW10c/4JEGRcI1FmrJBPu BtMYPbg/3Y9LZROYN+mVIFxZxOfrmjfFZ96xt/TaMXo8vcEKtWcNEjhGBjEbfMUEm4aq8ygQ 4MuEcpJc8DJCHBkg2KBk13DkbU2qNepTD6Uip1C+g+KMr0nd6KOJqSH27ZuNY4xqV4hIxFHp ex0zY7mq6fV2o6sKBGQzRdI20FDYmNjsLJwjH6qJ8laxFphZnPRpBThmu0AjuBWE72GnI1oA aO+bs92MQGJernt7hByCnDO82W/ykbVz+Ge3Sax8NY0m2Xdvp6WFDY/PjD9CdaJ9nwQGsUSa N54lrZ2qMTeCI9Vauwf6U69BA42xgk65VvxvTNqji+tZ4aZbarZ7el2/QDHOb/rRwlCFplS/ z4l1f1nOrE6bnDl5RBJyW3zi74P6GwIDAQABo4IBWTCCAVUwDAYDVR0TAQH/BAIwADBWBglg hkgBhvhCAQ0ESRZHVG8gZ2V0IHlvdXIgb3duIGNlcnRpZmljYXRlIGZvciBGUkVFIGhlYWQg b3ZlciB0byBodHRwOi8vd3d3LkNBY2VydC5vcmcwDgYDVR0PAQH/BAQDAgOoMEAGA1UdJQQ5 MDcGCCsGAQUFBwMEBggrBgEFBQcDAgYKKwYBBAGCNwoDBAYKKwYBBAGCNwoDAwYJYIZIAYb4 QgQBMDIGCCsGAQUFBwEBBCYwJDAiBggrBgEFBQcwAYYWaHR0cDovL29jc3AuY2FjZXJ0Lm9y ZzAxBgNVHR8EKjAoMCagJKAihiBodHRwOi8vY3JsLmNhY2VydC5vcmcvcmV2b2tlLmNybDA0 BgNVHREELTArgRRhaGZlcnJvaW43QGdtYWlsLmNvbYETYWhlbW1lbGdAb2hpb2d0LmNvbTAN BgkqhkiG9w0BAQ0FAAOCAgEAGvl7xb42JMRH5D/vCIDYvFY3dR2FPd5kmOqpKU/fvQ8ovmJa p5N/FDrsCL+YdslxPY+AAn78PYmL5pFHTdRadT++07DPIMtQyy2qd+XRmz6zP8Il7vGcEDmO WmMLYMq4xV9s/N7t7JJp6ftdIYUcoTVChUgilDaRWMLidtslCdRsBVfUjPb1bF5Ua31diKDP e0M9/e2CU36rbcTtiNCXhptMigzuL3zJXUf2B9jyUV8pnqNEQH36fqJ7YTBLcpq3aYa2XbAH Hgx9GehJBIqwspDmhPCFZ/QmqUXCkt+XfvinQ2NzKR6P3+OdYbwqzVX8BdMeojh7Ig8x/nIx mQ+/ufstL1ZYp0bg13fyK/hPYSIBpayaC76vzWovkIm70DIDRIFLi20p/qTd7rfDYy831Hjm +lDdCECF9bIXEWFk33kA97dgQIMbf5chEmlFg8S0e4iw7LMjvRqMX3eCD8GJ2+oqyZUwzZxy S0Mx+rBld5rrN7LsXwZ671HsGqNeYbYeU25e7t7/Gcc6Bd/kPfA+adEuUGFcvUKH3trDYqNq 6mOkAd8WO/mQadlc3ztS++XDMhmIpfBre9MPAr6usqf+wc+R8Nk9KLK39kEgrqVfzc/fgf8L MaD4rHnusdg4gca6Yi+kNrm99anw7SwaBrBvULYBp7ixNRUhaYiNW4YjTrYxggShMIIEnQIB ATCBgDB5MRAwDgYDVQQKEwdSb290IENBMR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5v cmcxIjAgBgNVBAMTGUNBIENlcnQgU2lnbmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEW EnN1cHBvcnRAY2FjZXJ0Lm9yZwIDEG5VMAkGBSsOAwIaBQCgggH1MBgGCSqGSIb3DQEJAzEL BgkqhkiG9w0BBwEwHAYJKoZIhvcNAQkFMQ8XDTE1MDQyMjE0MDU1MFowIwYJKoZIhvcNAQkE MRYEFFSyg59AT9QJGWvdBRhIN8dyR4PZMGwGCSqGSIb3DQEJDzFfMF0wCwYJYIZIAWUDBAEq MAsGCWCGSAFlAwQBAjAKBggqhkiG9w0DBzAOBggqhkiG9w0DAgICAIAwDQYIKoZIhvcNAwIC AUAwBwYFKw4DAgcwDQYIKoZIhvcNAwICASgwgZEGCSsGAQQBgjcQBDGBgzCBgDB5MRAwDgYD VQQKEwdSb290IENBMR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMT GUNBIENlcnQgU2lnbmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRAY2Fj ZXJ0Lm9yZwIDEG5VMIGTBgsqhkiG9w0BCRACCzGBg6CBgDB5MRAwDgYDVQQKEwdSb290IENB MR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNBIENlcnQgU2ln bmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRAY2FjZXJ0Lm9yZwIDEG5V MA0GCSqGSIb3DQEBAQUABIICADLzO1DFLNqJuZ8kevl8SMbGJudcExuLsL9n4VMaznzvndaZ 3m8rwFhXYqUtkcQ1cjCw5EJqeG0N/BXUw/qs7Osc582G68Ob+dNcfMs9QdOCUFIp1IcmUKaX YaF2GEiNzKIUkfZ2m5xNW+Q90UHSK7HaSOs2lpHbl/E9AuxHwEtEsnItFOgaJtvOv3R2HxA6 zLmdgJudOpDt6NtFN1hObKeEnfuhNYb/cgLRRsNsR+OkWCEWglSD0189eK1TWoGcUgvVX5bK JQM+w8Ar8uoP6rCZ8AE7Z3X8rub81GLlRDmHPzg918dYpa6K1nKZA0ovVPucrbRI7K9m4CZu XNSdAa1dpyapapT5r9PUm4SjSOv21OJ9lXzWVOwNajraLAyEUypzv2czJP3TmSTzKrG5Sgso VY6YfwlHy+veNQDzqzar5NAYSd/mTsF+HBvDXNKoV8xlD6sl9WQo+iI5ZVAqpfw08WYNJe1t u7SZEVN5Q0BcVE5Pp+hki0qZV+VZDJjwq3bLVYfQ5119i5PefEBjtQjRFPjw0tFx96P9P7YH RH6ogldBVbaCYDzN5Rb09XjxJulb910EFp0mciFW4rsqoJbiJbAZxWjLstwQWMschj8YwEgG vKnsT/haTkz4BshBa+VgMSsoVz/B9ogGa3aPDQ5pByV8xS3yixiTlayfTuJfAAAAAAAA --------------ms060904040706010200080807-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/