[{"id":1781989,"web_url":"http://patchwork.ozlabs.org/comment/1781989/","msgid":"<20171007030541.GA29421@gondor.apana.org.au>","list_archive_url":null,"date":"2017-10-07T03:05:41","subject":"Re: [PATCH v8 01/20] crypto: change transient busy return code to\n\t-EAGAIN","submitter":{"id":357,"url":"http://patchwork.ozlabs.org/api/people/357/","name":"Herbert Xu","email":"herbert@gondor.apana.org.au"},"content":"On Tue, Sep 05, 2017 at 03:38:40PM +0300, Gilad Ben-Yossef wrote:\n>\n> diff --git a/crypto/algif_hash.c b/crypto/algif_hash.c\n> index 5e92bd2..3b3c154 100644\n> --- a/crypto/algif_hash.c\n> +++ b/crypto/algif_hash.c\n> @@ -39,6 +39,20 @@ struct algif_hash_tfm {\n> \tbool has_key;\n> };\n> \n> +/* Previous versions of crypto_* ops used to return -EBUSY\n> + * rather than -EAGAIN to indicate being tied up. The in\n> + * kernel API changed but we don't want to break the user\n> + * space API. As only the hash user interface exposed this\n> + * error ever to the user, do the translation here.\n> + */\n> +static inline int crypto_user_err(int err)\n> +{\n> +\tif (err == -EAGAIN)\n> +\t\treturn -EBUSY;\n> +\n> +\treturn err;\n\nI don't see the need to carry along this baggage. Does anyone\nin user-space actually rely on EBUSY?\n\nCheers,","headers":{"Return-Path":"","X-Original-To":"incoming-imx@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming-imx@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=lists.infradead.org\n\t(client-ip=65.50.211.133; helo=bombadil.infradead.org;\n\tenvelope-from=linux-arm-kernel-bounces+incoming-imx=patchwork.ozlabs.org@lists.infradead.org;\n\treceiver=)","ozlabs.org; dkim=pass (2048-bit key;\n\tunprotected) header.d=lists.infradead.org\n\theader.i=@lists.infradead.org\n\theader.b=\"m7aFlsyG\"; dkim-atps=neutral"],"Received":["from bombadil.infradead.org (bombadil.infradead.org\n\t[65.50.211.133])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256\n\tbits)) (No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3y8BJR4J9zz9ryr\n\tfor ;\n\tSat, 7 Oct 2017 14:07:35 +1100 (AEDT)","from localhost ([127.0.0.1] helo=bombadil.infradead.org)\n\tby bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux))\n\tid 1e0fSa-0003xU-JO; Sat, 07 Oct 2017 03:07:28 +0000","from orcrist.hmeau.com ([104.223.48.154] helo=deadmen.hmeau.com)\n\tby bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux))\n\tid 1e0fSW-0003tF-M8; Sat, 07 Oct 2017 03:07:27 +0000","from gondobar.mordor.me.apana.org.au ([192.168.128.4]\n\thelo=gondobar)\n\tby deadmen.hmeau.com with esmtp (Exim 4.84_2 #2 (Debian))\n\tid 1e0fRG-0000aQ-7c; Sat, 07 Oct 2017 11:06:06 +0800","from herbert by gondobar with local (Exim 4.84_2)\n\t(envelope-from )\n\tid 1e0fQr-0007fa-DT; Sat, 07 Oct 2017 11:05:41 +0800"],"DKIM-Signature":"v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;\n\td=lists.infradead.org; s=bombadil.20170209; h=Sender:\n\tContent-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post:\n\tList-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:\n\tMessage-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description:\n\tResent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:\n\tList-Owner; bh=YRcR5AdU4CRQK54lDHXAQX3ogtWFjGD1fmFy3qaEzws=;\n\tb=m7aFlsyGQ+AoDU\n\tO2rJ6SKFCMv+V5NKkr/au/MJ9l0nug+01wK53TOrmSgS6jdo9gfDlSubP3GuoefkKVH7viXJECTeE\n\tasVo5JqVTQCPBaxsCxZRr5LXgqu3w00CevijFtARIe8B4M1WytNTPMsniSq4vwr6/QoXzWcoKJLnH\n\t2Rq/Hqp+i7mjKf/g6QQAAG6VcJWDGHMQ3L26T6QzGGz2ntJHAIRX/NPnk00iTDUuUmecA6lb5gob5\n\tccu2j+TqDIoi3xb8rwzKY6wNeBgbEa9HS/0LBAHdVi6Y/8+BE0p18jUuf24YNqVEcl2RYN+/pzHJr\n\t6uxbfM+FP2LnFyUpv+cQ==;","Date":"Sat, 7 Oct 2017 11:05:41 +0800","From":"Herbert Xu ","To":"Gilad Ben-Yossef ","Subject":"Re: [PATCH v8 01/20] crypto: change transient busy return code to\n\t-EAGAIN","Message-ID":"<20171007030541.GA29421@gondor.apana.org.au>","References":"<1504615144-29770-1-git-send-email-gilad@benyossef.com>\n\t<1504615144-29770-2-git-send-email-gilad@benyossef.com>","MIME-Version":"1.0","Content-Disposition":"inline","In-Reply-To":"<1504615144-29770-2-git-send-email-gilad@benyossef.com>","User-Agent":"Mutt/1.5.23 (2014-03-12)","X-CRM114-Version":"20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 ","X-CRM114-CacheID":"sfid-20171006_200725_114103_16623B67 ","X-CRM114-Status":"GOOD ( 11.34 )","X-Spam-Score":"-1.9 (-)","X-Spam-Report":"SpamAssassin version 3.4.1 on bombadil.infradead.org summary:\n\tContent analysis details: (-1.9 points)\n\tpts rule name description\n\t---- ----------------------\n\t--------------------------------------------------\n\t-0.0 SPF_PASS SPF: sender matches SPF record\n\t-1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1%\n\t[score: 0.0000]","X-BeenThere":"linux-arm-kernel@lists.infradead.org","X-Mailman-Version":"2.1.21","Precedence":"list","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Cc":"Mike Snitzer , linux-doc@vger.kernel.org,\n\tGary Hook , David Howells ,\n\tdm-devel@redhat.com, keyrings@vger.kernel.org,\n\tlinux-ima-devel@lists.sourceforge.net, Alasdair Kergon , \n\tSteffen Klassert ,\n\tBoris Brezillon ,\n\tJonathan Corbet ,\n\tAlexey Kuznetsov , \n\tMimi Zohar ,\n\t\"Serge E. Hallyn\" , \n\tTom Lendacky , linux-cifs@vger.kernel.org,\n\tlinux-ima-user@lists.sourceforge.net,\n\tArnaud Ebalard , \n\tlinux-raid@vger.kernel.org, linux-fscrypt@vger.kernel.org,\n\tlinux-mediatek@lists.infradead.org,\n\tJames Morris , \n\tMatthias Brugger ,\n\tJaegeuk Kim , \n\tlinux-arm-kernel@lists.infradead.org, Ofir Drang ,\n\t\"Theodore Y. Ts'o\" ,\n\tHideaki YOSHIFUJI ,\n\tDmitry Kasatkin ,\n\tsamba-technical@lists.samba.org, \n\tlinux-kernel@vger.kernel.org, Steve French ,\n\tlinux-security-module@vger.kernel.org, linux-crypto@vger.kernel.org, \n\tnetdev@vger.kernel.org, \"David S. Miller\" ,\n\tShaohua Li ","Content-Type":"text/plain; charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Sender":"\"linux-arm-kernel\" ","Errors-To":"linux-arm-kernel-bounces+incoming-imx=patchwork.ozlabs.org@lists.infradead.org","List-Id":"linux-imx-kernel.lists.patchwork.ozlabs.org"}},{"id":1782037,"web_url":"http://patchwork.ozlabs.org/comment/1782037/","msgid":"","list_archive_url":null,"date":"2017-10-07T07:51:42","subject":"Re: [PATCH v8 01/20] crypto: change transient busy return code to\n\t-EAGAIN","submitter":{"id":11198,"url":"http://patchwork.ozlabs.org/api/people/11198/","name":"Gilad Ben-Yossef","email":"gilad@benyossef.com"},"content":"On Sat, Oct 7, 2017 at 6:05 AM, Herbert Xu wrote:\n> On Tue, Sep 05, 2017 at 03:38:40PM +0300, Gilad Ben-Yossef wrote:\n>>\n>> diff --git a/crypto/algif_hash.c b/crypto/algif_hash.c\n>> index 5e92bd2..3b3c154 100644\n>> --- a/crypto/algif_hash.c\n>> +++ b/crypto/algif_hash.c\n>> @@ -39,6 +39,20 @@ struct algif_hash_tfm {\n>> bool has_key;\n>> };\n>>\n>> +/* Previous versions of crypto_* ops used to return -EBUSY\n>> + * rather than -EAGAIN to indicate being tied up. The in\n>> + * kernel API changed but we don't want to break the user\n>> + * space API. As only the hash user interface exposed this\n>> + * error ever to the user, do the translation here.\n>> + */\n>> +static inline int crypto_user_err(int err)\n>> +{\n>> + if (err == -EAGAIN)\n>> + return -EBUSY;\n>> +\n>> + return err;\n>\n> I don't see the need to carry along this baggage. Does anyone\n> in user-space actually rely on EBUSY?\n\n\nI am not aware of anyone who does. I was just trying to avoid\nchanging the user ABI.\n\nShall I roll a new revision without this patch?\n\nThanks,\nGilad\n\n>\n> Cheers,\n> --\n> Email: Herbert Xu \n> Home Page: http://gondor.apana.org.au/~herbert/\n> PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt","headers":{"Return-Path":"","X-Original-To":"incoming-imx@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming-imx@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=lists.infradead.org\n\t(client-ip=65.50.211.133; helo=bombadil.infradead.org;\n\tenvelope-from=linux-arm-kernel-bounces+incoming-imx=patchwork.ozlabs.org@lists.infradead.org;\n\treceiver=)","ozlabs.org; dkim=pass (2048-bit key;\n\tunprotected) header.d=lists.infradead.org\n\theader.i=@lists.infradead.org header.b=\"ZlYG9846\"; \n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=benyossef-com.20150623.gappssmtp.com\n\theader.i=@benyossef-com.20150623.gappssmtp.com header.b=\"pPniklwi\"; 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Hallyn\" , \n\tTom Lendacky , linux-cifs@vger.kernel.org,\n\tlinux-ima-user@lists.sourceforge.net,\n\tArnaud Ebalard , \n\tlinux-raid@vger.kernel.org, linux-fscrypt@vger.kernel.org,\n\tlinux-mediatek@lists.infradead.org,\n\tJames Morris , \n\tMatthias Brugger ,\n\tJaegeuk Kim , \n\tlinux-arm-kernel@lists.infradead.org, Ofir Drang ,\n\t\"Theodore Y. Ts'o\" ,\n\tHideaki YOSHIFUJI ,\n\tDmitry Kasatkin ,\n\tsamba-technical@lists.samba.org, \n\tLinux kernel mailing list ,\n\tSteve French , linux-security-module@vger.kernel.org, \n\tLinux Crypto Mailing List ,\n\tnetdev@vger.kernel.org, \"David S. Miller\" ,\n\tShaohua Li ","Content-Type":"text/plain; charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Sender":"\"linux-arm-kernel\" ","Errors-To":"linux-arm-kernel-bounces+incoming-imx=patchwork.ozlabs.org@lists.infradead.org","List-Id":"linux-imx-kernel.lists.patchwork.ozlabs.org"}},{"id":1784308,"web_url":"http://patchwork.ozlabs.org/comment/1784308/","msgid":"<20171011062651.GA18664@gondor.apana.org.au>","list_archive_url":null,"date":"2017-10-11T06:26:51","subject":"Re: [PATCH v8 01/20] crypto: change transient busy return code to\n\t-EAGAIN","submitter":{"id":357,"url":"http://patchwork.ozlabs.org/api/people/357/","name":"Herbert Xu","email":"herbert@gondor.apana.org.au"},"content":"On Sat, Oct 07, 2017 at 10:51:42AM +0300, Gilad Ben-Yossef wrote:\n> On Sat, Oct 7, 2017 at 6:05 AM, Herbert Xu wrote:\n> > On Tue, Sep 05, 2017 at 03:38:40PM +0300, Gilad Ben-Yossef wrote:\n> >>\n> >> diff --git a/crypto/algif_hash.c b/crypto/algif_hash.c\n> >> index 5e92bd2..3b3c154 100644\n> >> --- a/crypto/algif_hash.c\n> >> +++ b/crypto/algif_hash.c\n> >> @@ -39,6 +39,20 @@ struct algif_hash_tfm {\n> >> bool has_key;\n> >> };\n> >>\n> >> +/* Previous versions of crypto_* ops used to return -EBUSY\n> >> + * rather than -EAGAIN to indicate being tied up. The in\n> >> + * kernel API changed but we don't want to break the user\n> >> + * space API. As only the hash user interface exposed this\n> >> + * error ever to the user, do the translation here.\n> >> + */\n> >> +static inline int crypto_user_err(int err)\n> >> +{\n> >> + if (err == -EAGAIN)\n> >> + return -EBUSY;\n> >> +\n> >> + return err;\n> >\n> > I don't see the need to carry along this baggage. Does anyone\n> > in user-space actually rely on EBUSY?\n> \n> \n> I am not aware of anyone who does. I was just trying to avoid\n> changing the user ABI.\n> \n> Shall I roll a new revision without this patch?\n\nYes please. I'd rather not carry this around for eternity unless\nit was actually required.\n\nThanks,","headers":{"Return-Path":"","X-Original-To":"incoming-imx@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming-imx@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=lists.infradead.org\n\t(client-ip=65.50.211.133; helo=bombadil.infradead.org;\n\tenvelope-from=linux-arm-kernel-bounces+incoming-imx=patchwork.ozlabs.org@lists.infradead.org;\n\treceiver=)","ozlabs.org; dkim=pass (2048-bit key;\n\tunprotected) header.d=lists.infradead.org\n\theader.i=@lists.infradead.org\n\theader.b=\"RXgUIuyW\"; dkim-atps=neutral"],"Received":["from bombadil.infradead.org (bombadil.infradead.org\n\t[65.50.211.133])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256\n\tbits)) (No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3yBkb93V7Fz9t7X\n\tfor ;\n\tWed, 11 Oct 2017 17:29:09 +1100 (AEDT)","from localhost ([127.0.0.1] helo=bombadil.infradead.org)\n\tby bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux))\n\tid 1e2AVs-0001Of-Bu; Wed, 11 Oct 2017 06:29:04 +0000","from orcrist.hmeau.com ([104.223.48.154] helo=deadmen.hmeau.com)\n\tby bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux))\n\tid 1e2AVn-0001Kv-Gu; Wed, 11 Oct 2017 06:29:02 +0000","from gondobar.mordor.me.apana.org.au ([192.168.128.4]\n\thelo=gondobar)\n\tby deadmen.hmeau.com with esmtp (Exim 4.84_2 #2 (Debian))\n\tid 1e2AU8-0007XM-Qs; Wed, 11 Oct 2017 14:27:16 +0800","from herbert by gondobar with local (Exim 4.84_2)\n\t(envelope-from )\n\tid 1e2ATj-0004sA-MA; Wed, 11 Oct 2017 14:26:51 +0800"],"DKIM-Signature":"v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;\n\td=lists.infradead.org; s=bombadil.20170209; h=Sender:\n\tContent-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post:\n\tList-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:\n\tMessage-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description:\n\tResent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:\n\tList-Owner; bh=0koHKMp/dw18xMsHkdljQD7YlzynryZDnwNbe0ISJJY=;\n\tb=RXgUIuyWwV4Sg3\n\t8hRPP6eUu9Uj1vcwyg6n51PQt0v3wftisVfj76wCnjGISDQ3OYzqD8WSZK5sKB1+0z4ncSbW9yl0+\n\twyYot/AEfotRjQSOMS63RCdeclBeftLKbYoSdkjO25FdHNS/vAIpfM9/SUdUIV1mMC+C0g6iooAs0\n\tfe3Ear4PtCYY2MkKuWxHGPhPZyu66uCCTRdKTlHmBSM5xdFK0U7QSMn5qmCeSTG1QcDCbmstDvP8A\n\tzA6JNAzbOjJsNxsA52cu6oIwlXYVAFzfCQ2jaQUfMNEaUgrBNLAA0T0QtuTWOcqpsDFVcgjRQyzWZ\n\tgzm3CEi4ShkyB+2jzsRg==;","Date":"Wed, 11 Oct 2017 14:26:51 +0800","From":"Herbert Xu ","To":"Gilad Ben-Yossef ","Subject":"Re: [PATCH v8 01/20] crypto: change transient busy return code to\n\t-EAGAIN","Message-ID":"<20171011062651.GA18664@gondor.apana.org.au>","References":"<1504615144-29770-1-git-send-email-gilad@benyossef.com>\n\t<1504615144-29770-2-git-send-email-gilad@benyossef.com>\n\t<20171007030541.GA29421@gondor.apana.org.au>\n\t","MIME-Version":"1.0","Content-Disposition":"inline","In-Reply-To":"","User-Agent":"Mutt/1.5.23 (2014-03-12)","X-CRM114-Version":"20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 ","X-CRM114-CacheID":"sfid-20171010_232900_158476_48B50F33 ","X-CRM114-Status":"GOOD ( 15.25 )","X-Spam-Score":"-1.9 (-)","X-Spam-Report":"SpamAssassin version 3.4.1 on bombadil.infradead.org summary:\n\tContent analysis details: (-1.9 points)\n\tpts rule name description\n\t---- ----------------------\n\t--------------------------------------------------\n\t-0.0 SPF_PASS SPF: sender matches SPF record\n\t-1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1%\n\t[score: 0.0000]","X-BeenThere":"linux-arm-kernel@lists.infradead.org","X-Mailman-Version":"2.1.21","Precedence":"list","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Cc":"Mike Snitzer , linux-doc@vger.kernel.org,\n\tGary Hook , David Howells ,\n\tdevice-mapper development ,\n\tkeyrings@vger.kernel.org, linux-ima-devel@lists.sourceforge.net,\n\tAlasdair Kergon , \n\tSteffen Klassert ,\n\tBoris Brezillon ,\n\tJonathan Corbet ,\n\tAlexey Kuznetsov , \n\tMimi Zohar ,\n\t\"Serge E. 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