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authorChuck Lever <chuck.lever@oracle.com>2008-08-27 16:57:23 -0400
committerJ. Bruce Fields <bfields@citi.umich.edu>2008-09-29 18:13:38 -0400
commit1b333c54a15a746ff6b04a684b0845a66daacef2 (patch)
treed0a09595e34db6b176fbe5f59b60f0c45ee7cd85 /fs/lockd/host.c
parentc2526f42711d93f3455f92a82b5e586880fc44be (diff)
lockd: address-family independent printable addresses
Knowing which source address is used for communicating with remote NLM services can be helpful for debugging configuration problems on hosts with multiple addresses. Keep the dprintk debugging here, but adapt it so it displays AF_INET6 addresses properly. There are also a couple of dprintk clean-ups as well. At some point we will aggregate the helpers that display presentation format addresses into a single set of shared helpers. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Diffstat (limited to 'fs/lockd/host.c')
-rw-r--r--fs/lockd/host.c78
1 files changed, 61 insertions, 17 deletions
diff --git a/fs/lockd/host.c b/fs/lockd/host.c
index cb26e3d952a..e5dcfa57e09 100644
--- a/fs/lockd/host.c
+++ b/fs/lockd/host.c
@@ -11,12 +11,14 @@
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/in.h>
+#include <linux/in6.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svc.h>
#include <linux/lockd/lockd.h>
#include <linux/lockd/sm_inter.h>
#include <linux/mutex.h>
+#include <net/ipv6.h>
#define NLMDBG_FACILITY NLMDBG_HOSTCACHE
#define NLM_HOST_NRHASH 32
@@ -38,6 +40,32 @@ static struct nsm_handle * nsm_find(const struct sockaddr_in *sin,
const char *hostname,
unsigned int hostname_len);
+static void nlm_display_address(const struct sockaddr *sap,
+ char *buf, const size_t len)
+{
+ const struct sockaddr_in *sin = (struct sockaddr_in *)sap;
+ const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
+
+ switch (sap->sa_family) {
+ case AF_UNSPEC:
+ snprintf(buf, len, "unspecified");
+ break;
+ case AF_INET:
+ snprintf(buf, len, NIPQUAD_FMT, NIPQUAD(sin->sin_addr.s_addr));
+ break;
+ case AF_INET6:
+ if (ipv6_addr_v4mapped(&sin6->sin6_addr))
+ snprintf(buf, len, NIPQUAD_FMT,
+ NIPQUAD(sin6->sin6_addr.s6_addr32[3]));
+ else
+ snprintf(buf, len, NIP6_FMT, NIP6(sin6->sin6_addr));
+ break;
+ default:
+ snprintf(buf, len, "unsupported address family");
+ break;
+ }
+}
+
/*
* Common host lookup routine for server & client
*/
@@ -54,14 +82,10 @@ static struct nlm_host *nlm_lookup_host(int server,
struct nsm_handle *nsm = NULL;
int hash;
- dprintk("lockd: nlm_lookup_host("NIPQUAD_FMT"->"NIPQUAD_FMT
- ", p=%d, v=%u, my role=%s, name=%.*s)\n",
- NIPQUAD(ssin->sin_addr.s_addr),
- NIPQUAD(sin->sin_addr.s_addr), proto, version,
- server? "server" : "client",
- hostname_len,
- hostname? hostname : "<none>");
-
+ 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>");
hash = NLM_ADDRHASH(sin->sin_addr.s_addr);
@@ -101,6 +125,8 @@ static struct nlm_host *nlm_lookup_host(int server,
hlist_add_head(&host->h_hash, chain);
nlm_get_host(host);
+ dprintk("lockd: nlm_lookup_host found host %s (%s)\n",
+ host->h_name, host->h_addrbuf);
goto out;
}
@@ -113,13 +139,17 @@ static struct nlm_host *nlm_lookup_host(int server,
else {
host = NULL;
nsm = nsm_find(sin, hostname, hostname_len);
- if (!nsm)
+ if (!nsm) {
+ dprintk("lockd: nlm_lookup_host failed; "
+ "no nsm handle\n");
goto out;
+ }
}
host = kzalloc(sizeof(*host), GFP_KERNEL);
if (!host) {
nsm_release(nsm);
+ dprintk("lockd: nlm_lookup_host failed; no memory\n");
goto out;
}
host->h_name = nsm->sm_name;
@@ -146,6 +176,15 @@ static struct nlm_host *nlm_lookup_host(int server,
INIT_LIST_HEAD(&host->h_reclaim);
nrhosts++;
+
+ nlm_display_address((struct sockaddr *)&host->h_addr,
+ host->h_addrbuf, sizeof(host->h_addrbuf));
+ nlm_display_address((struct sockaddr *)&host->h_saddr,
+ host->h_saddrbuf, sizeof(host->h_saddrbuf));
+
+ dprintk("lockd: nlm_lookup_host created host %s\n",
+ host->h_name);
+
out:
mutex_unlock(&nlm_host_mutex);
return host;
@@ -210,9 +249,8 @@ nlm_bind_host(struct nlm_host *host)
{
struct rpc_clnt *clnt;
- dprintk("lockd: nlm_bind_host("NIPQUAD_FMT"->"NIPQUAD_FMT")\n",
- NIPQUAD(host->h_saddr.sin_addr),
- NIPQUAD(host->h_addr.sin_addr));
+ dprintk("lockd: nlm_bind_host %s (%s), my addr=%s\n",
+ host->h_name, host->h_addrbuf, host->h_saddrbuf);
/* Lock host handle */
mutex_lock(&host->h_mutex);
@@ -224,7 +262,7 @@ nlm_bind_host(struct nlm_host *host)
if (time_after_eq(jiffies, host->h_nextrebind)) {
rpc_force_rebind(clnt);
host->h_nextrebind = jiffies + NLM_HOST_REBIND;
- dprintk("lockd: next rebind in %ld jiffies\n",
+ dprintk("lockd: next rebind in %lu jiffies\n",
host->h_nextrebind - jiffies);
}
} else {
@@ -327,12 +365,16 @@ void nlm_host_rebooted(const struct sockaddr_in *sin,
struct nsm_handle *nsm;
struct nlm_host *host;
- dprintk("lockd: nlm_host_rebooted(%s, %u.%u.%u.%u)\n",
- hostname, NIPQUAD(sin->sin_addr));
-
/* Find the NSM handle for this peer */
- if (!(nsm = __nsm_find(sin, hostname, hostname_len, 0)))
+ nsm = __nsm_find(sin, hostname, hostname_len, 0);
+ if (nsm == NULL) {
+ dprintk("lockd: never saw rebooted peer '%.*s' before\n",
+ hostname_len, hostname);
return;
+ }
+
+ dprintk("lockd: nlm_host_rebooted(%.*s, %s)\n",
+ hostname_len, hostname, nsm->sm_addrbuf);
/* When reclaiming locks on this peer, make sure that
* we set up a new notification */
@@ -516,6 +558,8 @@ retry:
nsm->sm_name = (char *) (nsm + 1);
memcpy(nsm->sm_name, hostname, hostname_len);
nsm->sm_name[hostname_len] = '\0';
+ nlm_display_address((struct sockaddr *)&nsm->sm_addr,
+ nsm->sm_addrbuf, sizeof(nsm->sm_addrbuf));
atomic_set(&nsm->sm_count, 1);
goto retry;