diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/lockd/host.c | 86 |
1 files changed, 56 insertions, 30 deletions
diff --git a/fs/lockd/host.c b/fs/lockd/host.c index be8f19d..3c4dc33 100644 --- a/fs/lockd/host.c +++ b/fs/lockd/host.c @@ -38,6 +38,17 @@ static struct nsm_handle *nsm_find(const struct sockaddr *sap, const size_t hostname_len, const int create); +struct nlm_lookup_host_info { + const int server; /* search for server|client */ + const struct sockaddr_in *sin; /* address to search for */ + const unsigned short protocol; /* transport to search for*/ + const u32 version; /* NLM version to search for */ + const char *hostname; /* remote's hostname */ + const size_t hostname_len; /* it's length */ + const struct sockaddr_in *src_sin; /* our address (optional) */ + const size_t src_len; /* it's length */ +}; + /* * Hash function must work well on big- and little-endian platforms */ @@ -121,23 +132,13 @@ static void nlm_display_address(const struct sockaddr *sap, /* * Common host lookup routine for server & client */ -static struct nlm_host *nlm_lookup_host(int server, - const struct sockaddr_in *sin, - int proto, u32 version, - const char *hostname, - unsigned int hostname_len, - const struct sockaddr_in *ssin) +static struct nlm_host *nlm_lookup_host(struct nlm_lookup_host_info *ni) { struct hlist_head *chain; struct hlist_node *pos; struct nlm_host *host; struct nsm_handle *nsm = NULL; - dprintk("lockd: nlm_lookup_host(proto=%d, vers=%u," - " my role is %s, hostname=%.*s)\n", - proto, version, server ? "server" : "client", - hostname_len, hostname ? hostname : "<none>"); - mutex_lock(&nlm_host_mutex); if (time_after_eq(jiffies, next_gc)) @@ -150,22 +151,23 @@ static struct nlm_host *nlm_lookup_host(int server, * different NLM rpc_clients into one single nlm_host object. * This would allow us to have one nlm_host per address. */ - chain = &nlm_hosts[nlm_hash_address((struct sockaddr *)sin)]; + chain = &nlm_hosts[nlm_hash_address((struct sockaddr *)ni->sin)]; hlist_for_each_entry(host, pos, chain, h_hash) { - if (!nlm_cmp_addr(nlm_addr(host), (struct sockaddr *)sin)) + if (!nlm_cmp_addr(nlm_addr(host), (struct sockaddr *)ni->sin)) continue; /* See if we have an NSM handle for this client */ if (!nsm) nsm = host->h_nsmhandle; - if (host->h_proto != proto) + if (host->h_proto != ni->protocol) continue; - if (host->h_version != version) + if (host->h_version != ni->version) continue; - if (host->h_server != server) + if (host->h_server != ni->server) continue; - if (!nlm_cmp_addr(nlm_srcaddr(host), (struct sockaddr *)ssin)) + if (!nlm_cmp_addr(nlm_srcaddr(host), + (struct sockaddr *)ni->src_sin)) continue; /* Move to head of hash chain. */ @@ -186,8 +188,9 @@ static struct nlm_host *nlm_lookup_host(int server, atomic_inc(&nsm->sm_count); else { host = NULL; - nsm = nsm_find((struct sockaddr *)sin, sizeof(*sin), - hostname, hostname_len, 1); + nsm = nsm_find((struct sockaddr *)ni->sin, + sizeof(struct sockaddr_in), + ni->hostname, ni->hostname_len, 1); if (!nsm) { dprintk("lockd: nlm_lookup_host failed; " "no nsm handle\n"); @@ -202,12 +205,12 @@ static struct nlm_host *nlm_lookup_host(int server, goto out; } host->h_name = nsm->sm_name; - memcpy(nlm_addr(host), sin, sizeof(*sin)); - host->h_addrlen = sizeof(*sin); + memcpy(nlm_addr(host), ni->sin, sizeof(struct sockaddr_in)); + host->h_addrlen = sizeof(struct sockaddr_in); nlm_clear_port(nlm_addr(host)); - memcpy(nlm_srcaddr(host), ssin, sizeof(*ssin)); - host->h_version = version; - host->h_proto = proto; + memcpy(nlm_srcaddr(host), ni->src_sin, sizeof(struct sockaddr_in)); + host->h_version = ni->version; + host->h_proto = ni->protocol; host->h_rpcclnt = NULL; mutex_init(&host->h_mutex); host->h_nextrebind = jiffies + NLM_HOST_REBIND; @@ -218,7 +221,7 @@ static struct nlm_host *nlm_lookup_host(int server, host->h_state = 0; /* pseudo NSM state */ host->h_nsmstate = 0; /* real NSM state */ host->h_nsmhandle = nsm; - host->h_server = server; + host->h_server = ni->server; hlist_add_head(&host->h_hash, chain); INIT_LIST_HEAD(&host->h_lockowners); spin_lock_init(&host->h_lock); @@ -273,9 +276,21 @@ struct nlm_host *nlmclnt_lookup_host(const struct sockaddr_in *sin, const struct sockaddr_in source = { .sin_family = AF_UNSPEC, }; + struct nlm_lookup_host_info ni = { + .server = 0, + .sin = sin, + .protocol = proto, + .version = version, + .hostname = hostname, + .hostname_len = hostname_len, + .src_sin = &source, + }; - return nlm_lookup_host(0, sin, proto, version, - hostname, hostname_len, &source); + dprintk("lockd: %s(host='%s', vers=%u, proto=%s)\n", __func__, + (hostname ? hostname : "<none>"), version, + (proto == IPPROTO_UDP ? "udp" : "tcp")); + + return nlm_lookup_host(&ni); } /* @@ -289,10 +304,21 @@ nlmsvc_lookup_host(struct svc_rqst *rqstp, .sin_family = AF_INET, .sin_addr = rqstp->rq_daddr.addr, }; + struct nlm_lookup_host_info ni = { + .server = 1, + .sin = svc_addr_in(rqstp), + .protocol = rqstp->rq_prot, + .version = rqstp->rq_vers, + .hostname = hostname, + .hostname_len = hostname_len, + .src_sin = &source, + }; + + 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")); - return nlm_lookup_host(1, svc_addr_in(rqstp), - rqstp->rq_prot, rqstp->rq_vers, - hostname, hostname_len, &source); + return nlm_lookup_host(&ni); } /* |