Return-Path: Received: from mx1.redhat.com ([209.132.183.28]:38530 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751811AbbGNSHN (ORCPT ); Tue, 14 Jul 2015 14:07:13 -0400 Message-ID: <55A54FD0.7020004@RedHat.com> Date: Tue, 14 Jul 2015 14:07:12 -0400 From: Steve Dickson MIME-Version: 1.0 To: Chuck Lever , linux-nfs@vger.kernel.org Subject: Re: [PATCH v3] rpc.nfsd: Squelch DNS errors when using the --host option References: <20150610144349.19869.87412.stgit@manet.1015granger.net> In-Reply-To: <20150610144349.19869.87412.stgit@manet.1015granger.net> Content-Type: text/plain; charset=utf-8 Sender: linux-nfs-owner@vger.kernel.org List-ID: On 06/10/2015 10:46 AM, Chuck Lever wrote: > Sean Elble says: >> [rpc.nfsd --host] throws an error/warning (where nfs-server is >> defined in /etc/hosts for the IPv4 address of the interface I wish >> for TCP port 2049 to be opened on): >> >> rpc.nfsd: unable to resolve nfs-server:nfs to inet6 address: Name >> or service not known > > I think we can simplify the use of getaddrinfo(3) so that only one > call is needed to gather both IPv4 and IPv6 addresses. The call > should fail, and an error should be reported, only when there are > _no_ addresses bound to a hostname. > > Reported-by: Sean Elble > Signed-off-by: Chuck Lever Committed... steved. > --- > > > Here is version 3. This version addresses both Jeff's and Kinglong's > review comments. It has passed basic testing. > > > utils/nfsd/nfsd.c | 70 ++------------------------------------------------- > utils/nfsd/nfssvc.c | 47 ++++++++++++++++++---------------- > utils/nfsd/nfssvc.h | 2 + > 3 files changed, 29 insertions(+), 90 deletions(-) > > diff --git a/utils/nfsd/nfsd.c b/utils/nfsd/nfsd.c > index 201bb13..2165744 100644 > --- a/utils/nfsd/nfsd.c > +++ b/utils/nfsd/nfsd.c > @@ -52,50 +52,6 @@ static struct option longopts[] = > { NULL, 0, 0, 0 } > }; > > -/* given a family and ctlbits, disable any that aren't listed in netconfig */ > -#ifdef HAVE_LIBTIRPC > -static void > -nfsd_enable_protos(unsigned int *proto4, unsigned int *proto6) > -{ > - struct netconfig *nconf; > - unsigned int *famproto; > - void *handle; > - > - xlog(D_GENERAL, "Checking netconfig for visible protocols."); > - > - handle = setnetconfig(); > - while((nconf = getnetconfig(handle))) { > - if (!(nconf->nc_flag & NC_VISIBLE)) > - continue; > - > - if (!strcmp(nconf->nc_protofmly, NC_INET)) > - famproto = proto4; > - else if (!strcmp(nconf->nc_protofmly, NC_INET6)) > - famproto = proto6; > - else > - continue; > - > - if (!strcmp(nconf->nc_proto, NC_TCP)) > - NFSCTL_TCPSET(*famproto); > - else if (!strcmp(nconf->nc_proto, NC_UDP)) > - NFSCTL_UDPSET(*famproto); > - > - xlog(D_GENERAL, "Enabling %s %s.", nconf->nc_protofmly, > - nconf->nc_proto); > - } > - endnetconfig(handle); > - return; > -} > -#else /* HAVE_LIBTIRPC */ > -static void > -nfsd_enable_protos(unsigned int *proto4, unsigned int *proto6) > -{ > - /* Enable all IPv4 protocols if no TIRPC support */ > - *proto4 = NFSCTL_ALLBITS; > - *proto6 = 0; > -} > -#endif /* HAVE_LIBTIRPC */ > - > int > main(int argc, char **argv) > { > @@ -108,8 +64,6 @@ main(int argc, char **argv) > unsigned int minorversset = 0; > unsigned int versbits = NFSCTL_VERDEFAULT; > unsigned int protobits = NFSCTL_ALLBITS; > - unsigned int proto4 = 0; > - unsigned int proto6 = 0; > int grace = -1; > int lease = -1; > > @@ -278,18 +232,6 @@ main(int argc, char **argv) > > xlog_open(progname); > > - nfsd_enable_protos(&proto4, &proto6); > - > - if (!NFSCTL_TCPISSET(protobits)) { > - NFSCTL_TCPUNSET(proto4); > - NFSCTL_TCPUNSET(proto6); > - } > - > - if (!NFSCTL_UDPISSET(protobits)) { > - NFSCTL_UDPUNSET(proto4); > - NFSCTL_UDPUNSET(proto6); > - } > - > /* make sure that at least one version is enabled */ > found_one = 0; > for (c = NFSD_MINVERS; c <= NFSD_MAXVERS; c++) { > @@ -302,8 +244,7 @@ main(int argc, char **argv) > } > > if (NFSCTL_VERISSET(versbits, 4) && > - !NFSCTL_TCPISSET(proto4) && > - !NFSCTL_TCPISSET(proto6)) { > + !NFSCTL_TCPISSET(protobits)) { > xlog(L_ERROR, "version 4 requires the TCP protocol"); > exit(1); > } > @@ -337,15 +278,10 @@ main(int argc, char **argv) > > i = 0; > do { > - error = nfssvc_set_sockets(AF_INET, proto4, haddr[i], port); > - if (!error) > - socket_up = 1; > -#ifdef IPV6_SUPPORTED > - error = nfssvc_set_sockets(AF_INET6, proto6, haddr[i], port); > + error = nfssvc_set_sockets(protobits, haddr[i], port); > if (!error) > socket_up = 1; > -#endif /* IPV6_SUPPORTED */ > - } while (++i < hcounter); > + } while (++i < hcounter); > > if (rdma_port) { > error = nfssvc_set_rdmaport(rdma_port); > diff --git a/utils/nfsd/nfssvc.c b/utils/nfsd/nfssvc.c > index 027e5ac..a2b11d8 100644 > --- a/utils/nfsd/nfssvc.c > +++ b/utils/nfsd/nfssvc.c > @@ -24,6 +24,7 @@ > > #include "nfslib.h" > #include "xlog.h" > +#include "nfssvc.h" > > #ifndef NFSD_FS_DIR > #define NFSD_FS_DIR "/proc/fs/nfsd" > @@ -124,22 +125,6 @@ nfssvc_setfds(const struct addrinfo *hints, const char *node, const char *port) > if (fd < 0) > return 0; > > - switch(hints->ai_family) { > - case AF_INET: > - family = "inet"; > - break; > -#ifdef IPV6_SUPPORTED > - case AF_INET6: > - family = "inet6"; > - break; > -#endif /* IPV6_SUPPORTED */ > - default: > - xlog(L_ERROR, "Unknown address family specified: %d\n", > - hints->ai_family); > - rc = EAFNOSUPPORT; > - goto error; > - } > - > rc = getaddrinfo(node, port, hints, &addrhead); > if (rc == EAI_NONAME && !strcmp(port, "nfs")) { > snprintf(buf, sizeof(buf), "%d", NFS_PORT); > @@ -147,10 +132,10 @@ nfssvc_setfds(const struct addrinfo *hints, const char *node, const char *port) > } > > if (rc != 0) { > - xlog(L_ERROR, "unable to resolve %s:%s to %s address: " > - "%s", node ? node : "ANYADDR", port, family, > - rc == EAI_SYSTEM ? strerror(errno) : > - gai_strerror(rc)); > + xlog(L_ERROR, "unable to resolve %s:%s: %s", > + node ? node : "ANYADDR", port, > + rc == EAI_SYSTEM ? strerror(errno) : > + gai_strerror(rc)); > goto error; > } > > @@ -169,6 +154,20 @@ nfssvc_setfds(const struct addrinfo *hints, const char *node, const char *port) > continue; > } > > + switch(addr->ai_addr->sa_family) { > + case AF_INET: > + family = "AF_INET"; > + break; > +#ifdef IPV6_SUPPORTED > + case AF_INET6: > + family = "AF_INET6"; > + break; > +#endif /* IPV6_SUPPORTED */ > + default: > + addr = addr->ai_next; > + continue; > + } > + > xlog(D_GENERAL, "Creating %s %s socket.", family, proto); > > /* open socket and prepare to hand it off to kernel */ > @@ -252,12 +251,16 @@ error: > } > > int > -nfssvc_set_sockets(const int family, const unsigned int protobits, > +nfssvc_set_sockets(const unsigned int protobits, > const char *host, const char *port) > { > struct addrinfo hints = { .ai_flags = AI_PASSIVE }; > > - hints.ai_family = family; > +#ifdef IPV6_SUPPORTED > + hints.ai_family = AF_UNSPEC; > +#else /* IPV6_SUPPORTED */ > + hints.ai_family = AF_INET; > +#endif /* IPV6_SUPPORTED */ > > if (!NFSCTL_ANYPROTO(protobits)) > return EPROTOTYPE; > diff --git a/utils/nfsd/nfssvc.h b/utils/nfsd/nfssvc.h > index fbb89b2..7d70f0d 100644 > --- a/utils/nfsd/nfssvc.h > +++ b/utils/nfsd/nfssvc.h > @@ -22,7 +22,7 @@ > > void nfssvc_mount_nfsdfs(char *progname); > int nfssvc_inuse(void); > -int nfssvc_set_sockets(const int family, const unsigned int protobits, > +int nfssvc_set_sockets(const unsigned int protobits, > const char *host, const char *port); > void nfssvc_set_time(const char *type, const int seconds); > int nfssvc_set_rdmaport(const char *port); > > -- > To unsubscribe from this list: send the line "unsubscribe linux-nfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >