diff options
| -rw-r--r-- | fs/lockd/host.c | 47 | ||||
| -rw-r--r-- | include/linux/lockd/lockd.h | 5 |
2 files changed, 41 insertions, 11 deletions
diff --git a/fs/lockd/host.c b/fs/lockd/host.c index cbd2398e594c..9fd8889097b7 100644 --- a/fs/lockd/host.c +++ b/fs/lockd/host.c @@ -304,16 +304,33 @@ struct nlm_host *nlmclnt_lookup_host(const struct sockaddr *sap, return nlm_lookup_host(&ni); } -/* - * Find an NLM client handle in the cache. If there is none, create it. +/** + * nlmsvc_lookup_host - Find an NLM host handle matching a remote client + * @rqstp: incoming NLM request + * @hostname: name of client host + * @hostname_len: length of client hostname + * + * Returns an nlm_host structure that matches the [client address, + * transport protocol, NLM version, client hostname] of the passed-in + * NLM request. If one doesn't already exist in the host cache, a + * new handle is created and returned. + * + * Before possibly creating a new nlm_host, construct a sockaddr + * for a specific source address in case the local system has + * multiple network addresses. The family of the address in + * rq_daddr is guaranteed to be the same as the family of the + * address in rq_addr, so it's safe to use the same family for + * the source address. */ -struct nlm_host * -nlmsvc_lookup_host(struct svc_rqst *rqstp, - const char *hostname, unsigned int hostname_len) +struct nlm_host *nlmsvc_lookup_host(const struct svc_rqst *rqstp, + const char *hostname, + const size_t hostname_len) { - const struct sockaddr_in source = { + struct sockaddr_in sin = { .sin_family = AF_INET, - .sin_addr = rqstp->rq_daddr.addr, + }; + struct sockaddr_in6 sin6 = { + .sin6_family = AF_INET6, }; struct nlm_lookup_host_info ni = { .server = 1, @@ -323,14 +340,26 @@ nlmsvc_lookup_host(struct svc_rqst *rqstp, .version = rqstp->rq_vers, .hostname = hostname, .hostname_len = hostname_len, - .src_sap = (struct sockaddr *)&source, - .src_len = sizeof(source), + .src_len = rqstp->rq_addrlen, }; dprintk("lockd: %s(host='%*s', vers=%u, proto=%s)\n", __func__, (int)hostname_len, hostname, rqstp->rq_vers, (rqstp->rq_prot == IPPROTO_UDP ? "udp" : "tcp")); + switch (ni.sap->sa_family) { + case AF_INET: + sin.sin_addr.s_addr = rqstp->rq_daddr.addr.s_addr; + ni.src_sap = (struct sockaddr *)&sin; + break; + case AF_INET6: + ipv6_addr_copy(&sin6.sin6_addr, &rqstp->rq_daddr.addr6); + ni.src_sap = (struct sockaddr *)&sin6; + break; + default: + return NULL; + } + return nlm_lookup_host(&ni); } diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h index 90a996d2f005..16ff2e88f05d 100644 --- a/include/linux/lockd/lockd.h +++ b/include/linux/lockd/lockd.h @@ -220,8 +220,9 @@ struct nlm_host *nlmclnt_lookup_host(const struct sockaddr *sap, const unsigned short protocol, const u32 version, const char *hostname); -struct nlm_host *nlmsvc_lookup_host(struct svc_rqst *, const char *, - unsigned int); +struct nlm_host *nlmsvc_lookup_host(const struct svc_rqst *rqstp, + const char *hostname, + const size_t hostname_len); struct rpc_clnt * nlm_bind_host(struct nlm_host *); void nlm_rebind_host(struct nlm_host *); struct nlm_host * nlm_get_host(struct nlm_host *); |