From patchwork Fri Aug 26 06:58:23 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mi Jinlong X-Patchwork-Id: 1100782 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter2.kernel.org (8.14.4/8.14.4) with ESMTP id p7Q6skx8024794 for ; Fri, 26 Aug 2011 06:54:47 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753748Ab1HZGyf (ORCPT ); Fri, 26 Aug 2011 02:54:35 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:50161 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1753674Ab1HZGye (ORCPT ); Fri, 26 Aug 2011 02:54:34 -0400 Received: from tang.cn.fujitsu.com (tang.cn.fujitsu.com [10.167.250.3]) by song.cn.fujitsu.com (Postfix) with ESMTP id DC655170139; Fri, 26 Aug 2011 14:54:30 +0800 (CST) Received: from mailserver.fnst.cn.fujitsu.com (tang.cn.fujitsu.com [127.0.0.1]) by tang.cn.fujitsu.com (8.14.3/8.13.1) with ESMTP id p7Q6sTtV022031; Fri, 26 Aug 2011 14:54:29 +0800 Received: from [127.0.0.1] ([10.167.225.24]) by mailserver.fnst.cn.fujitsu.com (Lotus Domino Release 8.5.1FP4) with ESMTP id 2011082614533601-9212 ; Fri, 26 Aug 2011 14:53:36 +0800 Message-ID: <4E57440F.90808@cn.fujitsu.com> Date: Fri, 26 Aug 2011 14:58:23 +0800 From: Mi Jinlong User-Agent: Thunderbird 2.0.0.9 (Windows/20071031) MIME-Version: 1.0 To: Chuck Lever CC: "J. Bruce Fields" , NFS , Trond Myklebust Subject: Re: [PATCH] sunrpc: Add scope id to svc_addr_u for IPv6 LINKLOCAL address References: <4E4F8B5D.6060404@cn.fujitsu.com> <20110822192620.GB16261@fieldses.org> <3CA77E10-4099-4DDB-BE7A-88395CC34C93@oracle.com> <20110822194459.GC16261@fieldses.org> <4E5492FD.8040903@cn.fujitsu.com> <16175F9F-67BA-4406-8A2A-936814D56E0F@oracle.com> <36B5EA7A-21EF-4E82-BF97-F657AEC5ED3B@oracle.com> In-Reply-To: <36B5EA7A-21EF-4E82-BF97-F657AEC5ED3B@oracle.com> X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.1FP4|July 25, 2010) at 2011-08-26 14:53:36, Serialize by Router on mailserver/fnst(Release 8.5.1FP4|July 25, 2010) at 2011-08-26 14:53:36, Serialize complete at 2011-08-26 14:53:36 Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter2.kernel.org [140.211.167.43]); Fri, 26 Aug 2011 06:54:47 +0000 (UTC) Thanks for you comment! Chuck Lever: > On Aug 25, 2011, at 10:30 AM, Chuck Lever wrote: > >> This seems like a good direction to go in. More comments below. >> >> On Aug 24, 2011, at 1:58 AM, Mi Jinlong wrote: >> >>> From: Mi Jinlong >>> Date: Mon, 24 Aug 2011 13:22:39 +0800 >>> Subject: [PATCH] SUNRPC: Replace svc_addr_u by sockaddr_storage >>> >>> For IPv6 local address, lockd can not callback to client for >>> missing scope id when binding address at inet6_bind: >>> >>> 324 if (addr_type & IPV6_ADDR_LINKLOCAL) { >>> 325 if (addr_len >= sizeof(struct sockaddr_in6) && >>> 326 addr->sin6_scope_id) { >>> 327 /* Override any existing binding, if another one >>> 328 * is supplied by user. >>> 329 */ >>> 330 sk->sk_bound_dev_if = addr->sin6_scope_id; >>> 331 } >>> 332 >>> 333 /* Binding to link-local address requires an interface */ >>> 334 if (!sk->sk_bound_dev_if) { >>> 335 err = -EINVAL; >>> 336 goto out_unlock; >>> 337 } >>> >>> Replacing svc_addr_u by sockaddr_storage, let rqstp->rq_daddr contains more info >>> besides address. >>> >>> Signed-off-by: Mi Jinlong >>> --- >>> fs/lockd/host.c | 14 ++------------ >>> fs/nfsd/nfs4state.c | 16 +--------------- >>> include/linux/sunrpc/svc.h | 30 +++++++++++++++++++++--------- >>> net/sunrpc/svc_xprt.c | 13 ++----------- >>> net/sunrpc/svcsock.c | 9 +++++---- >>> 5 files changed, 31 insertions(+), 51 deletions(-) >>> >>> diff --git a/fs/lockd/host.c b/fs/lockd/host.c >>> index b7c99bf..b23db05 100644 >>> --- a/fs/lockd/host.c >>> +++ b/fs/lockd/host.c >>> @@ -316,14 +316,8 @@ struct nlm_host *nlmsvc_lookup_host(const struct svc_rqst *rqstp, >>> struct hlist_node *pos; >>> struct nlm_host *host = NULL; >>> struct nsm_handle *nsm = NULL; >>> - struct sockaddr_in sin = { >>> - .sin_family = AF_INET, >>> - }; >>> - struct sockaddr_in6 sin6 = { >>> - .sin6_family = AF_INET6, >>> - }; >>> struct sockaddr *src_sap; >>> - size_t src_len = rqstp->rq_addrlen; >>> + size_t src_len = rqstp->rq_daddrlen; >>> struct nlm_lookup_host_info ni = { >>> .server = 1, >>> .sap = svc_addr(rqstp), >>> @@ -342,12 +336,8 @@ struct nlm_host *nlmsvc_lookup_host(const struct svc_rqst *rqstp, >>> >>> switch (ni.sap->sa_family) { >>> case AF_INET: >>> - sin.sin_addr.s_addr = rqstp->rq_daddr.addr.s_addr; >>> - src_sap = (struct sockaddr *)&sin; >>> - break; >>> case AF_INET6: >>> - ipv6_addr_copy(&sin6.sin6_addr, &rqstp->rq_daddr.addr6); >>> - src_sap = (struct sockaddr *)&sin6; >>> + src_sap = svc_daddr(rqstp); >>> break; >>> default: >>> dprintk("lockd: %s failed; unrecognized address family\n", >> With the destination address promoted to a full sockaddr, we probably do not need this switch any more. Got it. >> >> I notice that the IPv6 fork of rpc_cmp_addr() does not consider the scope IDs of the passed-in addresses. Perhaps it should? Have add scope ID compare at __rpc_cmp_addr6 as following patch. >> >>> diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c >>> index 3787ec1..07a18a5 100644 >>> --- a/fs/nfsd/nfs4state.c >>> +++ b/fs/nfsd/nfs4state.c >>> @@ -1173,20 +1173,6 @@ find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) >>> return NULL; >>> } ... snip ... >>> break; >>> @@ -155,7 +156,7 @@ static void svc_set_cmsg_data(struct svc_rqst *rqstp, struct cmsghdr *cmh) >>> cmh->cmsg_type = IPV6_PKTINFO; >>> pki->ipi6_ifindex = 0; >>> ipv6_addr_copy(&pki->ipi6_addr, >>> - &rqstp->rq_daddr.addr6); >>> + &svc_daddr_in6(rqstp)->sin6_addr); >> I kind of suspect more is needed here to deal with ipi6_ifindex. Got it. >> >>> cmh->cmsg_len = CMSG_LEN(sizeof(*pki)); >>> } >>> break; >>> @@ -500,7 +501,7 @@ static int svc_udp_get_dest_address4(struct svc_rqst *rqstp, >>> struct in_pktinfo *pki = CMSG_DATA(cmh); >>> if (cmh->cmsg_type != IP_PKTINFO) >>> return 0; >>> - rqstp->rq_daddr.addr.s_addr = pki->ipi_spec_dst.s_addr; >>> + svc_daddr_in(rqstp)->sin_addr.s_addr = pki->ipi_spec_dst.s_addr; >>> return 1; >>> } >>> >>> @@ -513,7 +514,7 @@ static int svc_udp_get_dest_address6(struct svc_rqst *rqstp, >>> struct in6_pktinfo *pki = CMSG_DATA(cmh); >>> if (cmh->cmsg_type != IPV6_PKTINFO) >>> return 0; >>> - ipv6_addr_copy(&rqstp->rq_daddr.addr6, &pki->ipi6_addr); >>> + ipv6_addr_copy(&svc_daddr_in6(rqstp)->sin6_addr, &pki->ipi6_addr); >> Likewise, is the incoming interface index ignored when constructing svc_daddr_in6(rqstp) ? > > Also, I can't seem to find where the address family field of svc_daddr() is being set. > Have complete it. thanks, Mi Jinlong From 84420475509ccc39ac8899f6f63140879a5278b6 Mon Sep 17 00:00:00 2001 From: Mi Jinlong Date: Mon, 26 Aug 2011 13:22:39 +0800 Subject: [PATCH v2] SUNRPC: Replace svc_addr_u by sockaddr_storage For IPv6 local address, lockd can not callback to client for missing scope id when binding address at inet6_bind: 324 if (addr_type & IPV6_ADDR_LINKLOCAL) { 325 if (addr_len >= sizeof(struct sockaddr_in6) && 326 addr->sin6_scope_id) { 327 /* Override any existing binding, if another one 328 * is supplied by user. 329 */ 330 sk->sk_bound_dev_if = addr->sin6_scope_id; 331 } 332 333 /* Binding to link-local address requires an interface */ 334 if (!sk->sk_bound_dev_if) { 335 err = -EINVAL; 336 goto out_unlock; 337 } Replacing svc_addr_u by sockaddr_storage, let rqstp->rq_daddr contains more info besides address. Signed-off-by: Mi Jinlong Reviewed-by: Chuck Lever --- fs/lockd/host.c | 25 ++----------------------- fs/nfsd/nfs4state.c | 16 +--------------- include/linux/sunrpc/clnt.h | 3 ++- include/linux/sunrpc/svc.h | 30 +++++++++++++++++++++--------- net/sunrpc/svc_xprt.c | 13 ++----------- net/sunrpc/svcsock.c | 23 +++++++++++++++++------ 6 files changed, 45 insertions(+), 65 deletions(-) diff --git a/fs/lockd/host.c b/fs/lockd/host.c index b7c99bf..6f29836 100644 --- a/fs/lockd/host.c +++ b/fs/lockd/host.c @@ -316,14 +316,8 @@ struct nlm_host *nlmsvc_lookup_host(const struct svc_rqst *rqstp, struct hlist_node *pos; struct nlm_host *host = NULL; struct nsm_handle *nsm = NULL; - struct sockaddr_in sin = { - .sin_family = AF_INET, - }; - struct sockaddr_in6 sin6 = { - .sin6_family = AF_INET6, - }; - struct sockaddr *src_sap; - size_t src_len = rqstp->rq_addrlen; + struct sockaddr *src_sap = svc_daddr(rqstp); + size_t src_len = rqstp->rq_daddrlen; struct nlm_lookup_host_info ni = { .server = 1, .sap = svc_addr(rqstp), @@ -340,21 +334,6 @@ struct nlm_host *nlmsvc_lookup_host(const struct svc_rqst *rqstp, mutex_lock(&nlm_host_mutex); - switch (ni.sap->sa_family) { - case AF_INET: - sin.sin_addr.s_addr = rqstp->rq_daddr.addr.s_addr; - src_sap = (struct sockaddr *)&sin; - break; - case AF_INET6: - ipv6_addr_copy(&sin6.sin6_addr, &rqstp->rq_daddr.addr6); - src_sap = (struct sockaddr *)&sin6; - break; - default: - dprintk("lockd: %s failed; unrecognized address family\n", - __func__); - goto out; - } - if (time_after_eq(jiffies, next_gc)) nlm_gc_hosts(); diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 3787ec1..07a18a5 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -1173,20 +1173,6 @@ find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) return NULL; } -static void rpc_svcaddr2sockaddr(struct sockaddr *sa, unsigned short family, union svc_addr_u *svcaddr) -{ - switch (family) { - case AF_INET: - ((struct sockaddr_in *)sa)->sin_family = AF_INET; - ((struct sockaddr_in *)sa)->sin_addr = svcaddr->addr; - return; - case AF_INET6: - ((struct sockaddr_in6 *)sa)->sin6_family = AF_INET6; - ((struct sockaddr_in6 *)sa)->sin6_addr = svcaddr->addr6; - return; - } -} - static void gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) { @@ -1218,7 +1204,7 @@ gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_r conn->cb_prog = se->se_callback_prog; conn->cb_ident = se->se_callback_ident; - rpc_svcaddr2sockaddr((struct sockaddr *)&conn->cb_saddr, expected_family, &rqstp->rq_daddr); + memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); return; out_err: conn->cb_addr.ss_family = AF_UNSPEC; diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h index db7bcaf..1529a80 100644 --- a/include/linux/sunrpc/clnt.h +++ b/include/linux/sunrpc/clnt.h @@ -218,7 +218,8 @@ static inline bool __rpc_cmp_addr6(const struct sockaddr *sap1, { const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sap1; const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sap2; - return ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr); + return ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr) + && (sin1->sin6_scope_id == sin2->sin6_scope_id); } static inline bool __rpc_copy_addr6(struct sockaddr *dst, diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h index 223588a..3bc0dc9 100644 --- a/include/linux/sunrpc/svc.h +++ b/include/linux/sunrpc/svc.h @@ -212,11 +212,6 @@ static inline void svc_putu32(struct kvec *iov, __be32 val) iov->iov_len += sizeof(__be32); } -union svc_addr_u { - struct in_addr addr; - struct in6_addr addr6; -}; - /* * The context of a single thread, including the request currently being * processed. @@ -225,8 +220,12 @@ struct svc_rqst { struct list_head rq_list; /* idle list */ struct list_head rq_all; /* all threads list */ struct svc_xprt * rq_xprt; /* transport ptr */ + struct sockaddr_storage rq_addr; /* peer address */ size_t rq_addrlen; + struct sockaddr_storage rq_daddr; /* dest addr of request + * - reply from here */ + size_t rq_daddrlen; struct svc_serv * rq_server; /* RPC service definition */ struct svc_pool * rq_pool; /* thread pool */ @@ -255,9 +254,6 @@ struct svc_rqst { unsigned short rq_secure : 1; /* secure port */ - union svc_addr_u rq_daddr; /* dest addr of request - * - reply from here */ - void * rq_argp; /* decoded arguments */ void * rq_resp; /* xdr'd results */ void * rq_auth_data; /* flavor-specific data */ @@ -300,6 +296,21 @@ static inline struct sockaddr *svc_addr(const struct svc_rqst *rqst) return (struct sockaddr *) &rqst->rq_addr; } +static inline struct sockaddr_in *svc_daddr_in(const struct svc_rqst *rqst) +{ + return (struct sockaddr_in *) &rqst->rq_daddr; +} + +static inline struct sockaddr_in6 *svc_daddr_in6(const struct svc_rqst *rqst) +{ + return (struct sockaddr_in6 *) &rqst->rq_daddr; +} + +static inline struct sockaddr *svc_daddr(const struct svc_rqst *rqst) +{ + return (struct sockaddr *) &rqst->rq_daddr; +} + /* * Check buffer bounds after decoding arguments */ @@ -340,7 +351,8 @@ struct svc_deferred_req { struct svc_xprt *xprt; struct sockaddr_storage addr; /* where reply must go */ size_t addrlen; - union svc_addr_u daddr; /* where reply must come from */ + struct sockaddr_storage daddr; /* where reply must come from */ + size_t daddrlen; struct cache_deferred_req handle; size_t xprt_hlen; int argslen; diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c index bd31208..d86bb67 100644 --- a/net/sunrpc/svc_xprt.c +++ b/net/sunrpc/svc_xprt.c @@ -254,8 +254,6 @@ EXPORT_SYMBOL_GPL(svc_create_xprt); */ void svc_xprt_copy_addrs(struct svc_rqst *rqstp, struct svc_xprt *xprt) { - struct sockaddr *sin; - memcpy(&rqstp->rq_addr, &xprt->xpt_remote, xprt->xpt_remotelen); rqstp->rq_addrlen = xprt->xpt_remotelen; @@ -263,15 +261,8 @@ void svc_xprt_copy_addrs(struct svc_rqst *rqstp, struct svc_xprt *xprt) * Destination address in request is needed for binding the * source address in RPC replies/callbacks later. */ - sin = (struct sockaddr *)&xprt->xpt_local; - switch (sin->sa_family) { - case AF_INET: - rqstp->rq_daddr.addr = ((struct sockaddr_in *)sin)->sin_addr; - break; - case AF_INET6: - rqstp->rq_daddr.addr6 = ((struct sockaddr_in6 *)sin)->sin6_addr; - break; - } + memcpy(&rqstp->rq_daddr, &xprt->xpt_local, xprt->xpt_locallen); + rqstp->rq_daddrlen = xprt->xpt_locallen; } EXPORT_SYMBOL_GPL(svc_xprt_copy_addrs); diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 767d494..dfd686e 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -143,19 +143,20 @@ static void svc_set_cmsg_data(struct svc_rqst *rqstp, struct cmsghdr *cmh) cmh->cmsg_level = SOL_IP; cmh->cmsg_type = IP_PKTINFO; pki->ipi_ifindex = 0; - pki->ipi_spec_dst.s_addr = rqstp->rq_daddr.addr.s_addr; + pki->ipi_spec_dst.s_addr = + svc_daddr_in(rqstp)->sin_addr.s_addr; cmh->cmsg_len = CMSG_LEN(sizeof(*pki)); } break; case AF_INET6: { struct in6_pktinfo *pki = CMSG_DATA(cmh); + struct sockaddr_in6 *daddr = svc_daddr_in6(rqstp); cmh->cmsg_level = SOL_IPV6; cmh->cmsg_type = IPV6_PKTINFO; - pki->ipi6_ifindex = 0; - ipv6_addr_copy(&pki->ipi6_addr, - &rqstp->rq_daddr.addr6); + pki->ipi6_ifindex = daddr->sin6_scope_id; + ipv6_addr_copy(&pki->ipi6_addr, &daddr->sin6_addr); cmh->cmsg_len = CMSG_LEN(sizeof(*pki)); } break; @@ -498,9 +499,13 @@ static int svc_udp_get_dest_address4(struct svc_rqst *rqstp, struct cmsghdr *cmh) { struct in_pktinfo *pki = CMSG_DATA(cmh); + struct sockaddr_in *daddr = svc_daddr_in(rqstp); + if (cmh->cmsg_type != IP_PKTINFO) return 0; - rqstp->rq_daddr.addr.s_addr = pki->ipi_spec_dst.s_addr; + + daddr->sin_family = AF_INET; + daddr->sin_addr.s_addr = pki->ipi_spec_dst.s_addr; return 1; } @@ -511,9 +516,14 @@ static int svc_udp_get_dest_address6(struct svc_rqst *rqstp, struct cmsghdr *cmh) { struct in6_pktinfo *pki = CMSG_DATA(cmh); + struct sockaddr_in6 *daddr = svc_daddr_in6(rqstp); + if (cmh->cmsg_type != IPV6_PKTINFO) return 0; - ipv6_addr_copy(&rqstp->rq_daddr.addr6, &pki->ipi6_addr); + + daddr->sin6_family = AF_INET6; + ipv6_addr_copy(&daddr->sin6_addr, &pki->ipi6_addr); + daddr->sin6_scope_id = pki->ipi6_ifindex; return 1; } @@ -614,6 +624,7 @@ static int svc_udp_recvfrom(struct svc_rqst *rqstp) skb_free_datagram_locked(svsk->sk_sk, skb); return 0; } + rqstp->rq_daddrlen = svc_addr_len(svc_daddr(rqstp)); if (skb_is_nonlinear(skb)) { /* we have to copy */