From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752698AbaAPPus (ORCPT ); Thu, 16 Jan 2014 10:50:48 -0500 Received: from mail-bn1lp0157.outbound.protection.outlook.com ([207.46.163.157]:23042 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752085AbaAPPuo (ORCPT ); Thu, 16 Jan 2014 10:50:44 -0500 From: KY Srinivasan To: Olaf Hering CC: "gregkh@linuxfoundation.org" , "linux-kernel@vger.kernel.org" , "devel@linuxdriverproject.org" , "apw@canonical.com" , "jasowang@redhat.com" Subject: RE: [PATCH V2 1/1] Drivers: hv: Implement the file copy service Thread-Topic: [PATCH V2 1/1] Drivers: hv: Implement the file copy service Thread-Index: AQHPEVjnKHWBxAK/ME2641uqAhZ1vZqHLleAgABUPeA= Date: Thu, 16 Jan 2014 15:50:41 +0000 Message-ID: <5b3daf707e8245bcabb392baefe6d6b0@BY2PR03MB299.namprd03.prod.outlook.com> References: <1389728116-21337-1-git-send-email-kys@microsoft.com> <20140116104841.GA21768@aepfle.de> In-Reply-To: <20140116104841.GA21768@aepfle.de> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [2601:8:9b00:402:1cb1:47cd:959b:a3a6] x-forefront-prvs: 0093C80C01 x-forefront-antispam-report: SFV:NSPM;SFS:(10009001)(779001)(679001)(689001)(51704005)(13464003)(199002)(189002)(24454002)(377454003)(76576001)(81542001)(80976001)(76786001)(76796001)(87266001)(83322001)(49866001)(4396001)(87936001)(2656002)(74706001)(93136001)(47446002)(69226001)(81342001)(19580395003)(31966008)(93516002)(74502001)(47976001)(19580405001)(50986001)(74662001)(51856001)(47736001)(56816005)(79102001)(46102001)(54316002)(77982001)(59766001)(92566001)(81686001)(54356001)(33646001)(85852003)(74876001)(85306002)(80022001)(53806001)(74316001)(90146001)(83072002)(65816001)(63696002)(81816001)(74366001)(76482001)(56776001)(24736002)(3826001);DIR:OUT;SFP:1101;SCL:1;SRVR:BY2PR03MB300;H:BY2PR03MB299.namprd03.prod.outlook.com;CLIP:2601:8:9b00:402:1cb1:47cd:959b:a3a6;FPR:;RD:InfoNoRecords;A:1;MX:1;LANG:en; Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 X-OriginatorOrg: microsoft.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by mail.home.local id s0GFp8Se018740 > -----Original Message----- > From: Olaf Hering [mailto:olaf@aepfle.de] > Sent: Thursday, January 16, 2014 2:49 AM > To: KY Srinivasan > Cc: gregkh@linuxfoundation.org; linux-kernel@vger.kernel.org; > devel@linuxdriverproject.org; apw@canonical.com; jasowang@redhat.com > Subject: Re: [PATCH V2 1/1] Drivers: hv: Implement the file copy service > > On Tue, Jan 14, K. Y. Srinivasan wrote: > > > Implement the file copy service for Linux guests on Hyper-V. This permits the > > host to copy a file (over VMBUS) into the guest. This facility is part of > > "guest integration services" supported on the Windows platform. > > Here is a link that provides additional details on this functionality: > > The change below fixes some warnings in the daemon code. > Compile tested only. > I also think the newlines in some of the syslog calls should be removed. > > Olaf > > > hv_fcopy_daemon.c: In function 'hv_start_fcopy': > hv_fcopy_daemon.c:44:3: warning: format '%s' expects argument of type 'char > *', but argument 3 has type '__u16 *' [-Wformat=] > smsg->file_name); > ^ > hv_fcopy_daemon.c:44:3: warning: format '%s' expects argument of type 'char > *', but argument 5 has type '__u16 *' [-Wformat=] > hv_fcopy_daemon.c:57:6: warning: format '%s' expects argument of type 'char > *', but argument 3 has type '__u16 *' [-Wformat=] > errno, strerror(errno)); > ^ > hv_fcopy_daemon.c:61:4: warning: format '%s' expects argument of type 'char > *', but argument 3 has type '__u16 *' [-Wformat=] > syslog(LOG_ERR, "Invalid path: %s\n", smsg->path_name); > ^ > hv_fcopy_daemon.c: In function 'main': > hv_fcopy_daemon.c:117:8: warning: ignoring return value of 'daemon', declared > with attribute warn_unused_result [-Wunused-result] > daemon(1, 0); > ^ > hv_fcopy_daemon.c:132:7: warning: ignoring return value of 'write', declared > with attribute warn_unused_result [-Wunused-result] > write(fcopy_fd, &version, sizeof(int)); > ^ > hv_fcopy_daemon.c:171:9: warning: ignoring return value of 'pwrite', declared > with attribute warn_unused_result [-Wunused-result] > pwrite(fcopy_fd, &error, sizeof(int), 0); > ^ > > Signed-off-by: Olaf Hering > > diff --git a/tools/hv/hv_fcopy_daemon.c b/tools/hv/hv_fcopy_daemon.c > index c0e5c90..d1fadb7 100644 > --- a/tools/hv/hv_fcopy_daemon.c > +++ b/tools/hv/hv_fcopy_daemon.c > @@ -35,14 +35,14 @@ > #include > > static int target_fd; > -char target_fname[W_MAX_PATH]; > +static char target_fname[W_MAX_PATH]; > > static int hv_start_fcopy(struct hv_start_fcopy *smsg) > { > int error = HV_E_FAIL; > > - sprintf(target_fname, "%s%s%s", smsg->path_name, "/", > - smsg->file_name); > + snprintf(target_fname, sizeof(target_fname), "%s/%s", > + (char *)smsg->path_name, (char*)smsg->file_name); > > syslog(LOG_INFO, "Target file name: %s\n", target_fname); > /* > @@ -54,12 +54,12 @@ static int hv_start_fcopy(struct hv_start_fcopy *smsg) > if (mkdir((char *)smsg->path_name, 0755)) { > syslog(LOG_ERR, > "Failed to create '%s'; error: %d %s\n", > - smsg->path_name, > + (char *)smsg->path_name, > errno, strerror(errno)); > goto done; > } > } else { > - syslog(LOG_ERR, "Invalid path: %s\n", smsg- > >path_name); > + syslog(LOG_ERR, "Invalid path: %s", (char *)smsg- > >path_name); > goto done; > } > } > @@ -115,7 +115,8 @@ int main(void) > char *buffer[4096 * 2]; > struct hv_fcopy_hdr *in_msg; > > - daemon(1, 0); > + if (daemon(1, 0)) > + return 1; > openlog("HV_FCOPY", 0, LOG_USER); > syslog(LOG_INFO, "HV_FCOPY starting; pid is:%d", getpid()); > > @@ -130,7 +131,10 @@ int main(void) > /* > * Register with the kernel. > */ > - write(fcopy_fd, &version, sizeof(int)); > + if (write(fcopy_fd, &version, sizeof(int)) != sizeof(int)) { > + syslog(LOG_ERR, "write failed: %s",strerror(errno)); > + exit(EXIT_FAILURE); > + } > > while (1) { > /* > @@ -169,6 +173,9 @@ int main(void) > > } > > - pwrite(fcopy_fd, &error, sizeof(int), 0); > + if (pwrite(fcopy_fd, &error, sizeof(int), 0) != sizeof(int)) { > + syslog(LOG_ERR, "pwrite failed: %s",strerror(errno)); > + exit(EXIT_FAILURE); > + } > } > } Thanks Olaf; I will include these changes in the next version. 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