#include <linux/sunrpc/svc.h>
#include <linux/lockd/lockd.h>
#include <linux/lockd/sm_inter.h>
+#include <linux/mutex.h>
#define NLMDBG_FACILITY NLMDBG_HOSTCACHE
static struct nlm_host * nlm_hosts[NLM_HOST_NRHASH];
static unsigned long next_gc;
static int nrhosts;
-static DECLARE_MUTEX(nlm_host_sema);
+static DEFINE_MUTEX(nlm_host_mutex);
static void nlm_gc_hosts(void);
hash = NLM_ADDRHASH(sin->sin_addr.s_addr);
/* Lock hash table */
- down(&nlm_host_sema);
+ mutex_lock(&nlm_host_mutex);
if (time_after_eq(jiffies, next_gc))
nlm_gc_hosts();
nlm_hosts[hash] = host;
}
nlm_get_host(host);
- up(&nlm_host_sema);
+ mutex_unlock(&nlm_host_mutex);
return host;
}
}
memset(host, 0, sizeof(*host));
addr = sin->sin_addr.s_addr;
- sprintf(host->h_name, "%d.%d.%d.%d",
- (unsigned char) (ntohl(addr) >> 24),
- (unsigned char) (ntohl(addr) >> 16),
- (unsigned char) (ntohl(addr) >> 8),
- (unsigned char) (ntohl(addr) >> 0));
+ sprintf(host->h_name, "%u.%u.%u.%u", NIPQUAD(addr));
host->h_addr = *sin;
host->h_addr.sin_port = 0; /* ouch! */
host->h_version = version;
host->h_proto = proto;
- host->h_authflavor = RPC_AUTH_UNIX;
host->h_rpcclnt = NULL;
init_MUTEX(&host->h_sema);
host->h_nextrebind = jiffies + NLM_HOST_REBIND;
host->h_expires = jiffies + NLM_HOST_EXPIRE;
- host->h_count = 1;
+ atomic_set(&host->h_count, 1);
init_waitqueue_head(&host->h_gracewait);
host->h_state = 0; /* pseudo NSM state */
host->h_nsmstate = 0; /* real NSM state */
host->h_server = server;
host->h_next = nlm_hosts[hash];
nlm_hosts[hash] = host;
+ INIT_LIST_HEAD(&host->h_lockowners);
+ spin_lock_init(&host->h_lock);
+ INIT_LIST_HEAD(&host->h_granted);
+ INIT_LIST_HEAD(&host->h_reclaim);
if (++nrhosts > NLM_HOST_MAX)
next_gc = 0;
nohost:
- up(&nlm_host_sema);
+ mutex_unlock(&nlm_host_mutex);
return host;
}
* and return it
*/
int hash;
- down(&nlm_host_sema);
+ mutex_lock(&nlm_host_mutex);
for (hash = 0 ; hash < NLM_HOST_NRHASH; hash++) {
struct nlm_host *host, **hp;
for (hp = &nlm_hosts[hash]; (host = *hp) != 0; hp = &host->h_next) {
if (host->h_server &&
host->h_killed == 0) {
nlm_get_host(host);
- up(&nlm_host_sema);
+ mutex_unlock(&nlm_host_mutex);
return host;
}
}
}
- up(&nlm_host_sema);
+ mutex_unlock(&nlm_host_mutex);
return NULL;
}
/* If we've already created an RPC client, check whether
* RPC rebind is required
- * Note: why keep rebinding if we're on a tcp connection?
*/
if ((clnt = host->h_rpcclnt) != NULL) {
xprt = clnt->cl_xprt;
- if (!xprt->stream && time_after_eq(jiffies, host->h_nextrebind)) {
- clnt->cl_port = 0;
+ 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",
host->h_nextrebind - jiffies);
goto forgetit;
xprt_set_timeout(&xprt->timeout, 5, nlmsvc_timeout);
+ xprt->resvport = 1; /* NLM requires a reserved port */
- clnt = rpc_create_client(xprt, host->h_name, &nlm_program,
- host->h_version, host->h_authflavor);
- if (IS_ERR(clnt)) {
- xprt_destroy(xprt);
+ /* Existing NLM servers accept AUTH_UNIX only */
+ clnt = rpc_new_client(xprt, host->h_name, &nlm_program,
+ host->h_version, RPC_AUTH_UNIX);
+ if (IS_ERR(clnt))
goto forgetit;
- }
clnt->cl_autobind = 1; /* turn on pmap queries */
- xprt->nocong = 1; /* No congestion control for NLM */
- xprt->resvport = 1; /* NLM requires a reserved port */
+ clnt->cl_softrtry = 1; /* All queries are soft */
host->h_rpcclnt = clnt;
}
{
dprintk("lockd: rebind host %s\n", host->h_name);
if (host->h_rpcclnt && time_after_eq(jiffies, host->h_nextrebind)) {
- host->h_rpcclnt->cl_port = 0;
+ rpc_force_rebind(host->h_rpcclnt);
host->h_nextrebind = jiffies + NLM_HOST_REBIND;
}
}
{
if (host) {
dprintk("lockd: get host %s\n", host->h_name);
- host->h_count ++;
+ atomic_inc(&host->h_count);
host->h_expires = jiffies + NLM_HOST_EXPIRE;
}
return host;
*/
void nlm_release_host(struct nlm_host *host)
{
- if (host && host->h_count) {
+ if (host != NULL) {
dprintk("lockd: release host %s\n", host->h_name);
- host->h_count --;
+ BUG_ON(atomic_read(&host->h_count) < 0);
+ if (atomic_dec_and_test(&host->h_count)) {
+ BUG_ON(!list_empty(&host->h_lockowners));
+ BUG_ON(!list_empty(&host->h_granted));
+ BUG_ON(!list_empty(&host->h_reclaim));
+ }
}
}
int i;
dprintk("lockd: shutting down host module\n");
- down(&nlm_host_sema);
+ mutex_lock(&nlm_host_mutex);
/* First, make all hosts eligible for gc */
dprintk("lockd: nuking all hosts...\n");
/* Then, perform a garbage collection pass */
nlm_gc_hosts();
- up(&nlm_host_sema);
+ mutex_unlock(&nlm_host_mutex);
/* complain if any hosts are left */
if (nrhosts) {
for (i = 0; i < NLM_HOST_NRHASH; i++) {
for (host = nlm_hosts[i]; host; host = host->h_next) {
dprintk(" %s (cnt %d use %d exp %ld)\n",
- host->h_name, host->h_count,
+ host->h_name, atomic_read(&host->h_count),
host->h_inuse, host->h_expires);
}
}
for (i = 0; i < NLM_HOST_NRHASH; i++) {
q = &nlm_hosts[i];
while ((host = *q) != NULL) {
- if (host->h_count || host->h_inuse
+ if (atomic_read(&host->h_count) || host->h_inuse
|| time_before(jiffies, host->h_expires)) {
dprintk("nlm_gc_hosts skipping %s (cnt %d use %d exp %ld)\n",
- host->h_name, host->h_count,
+ host->h_name, atomic_read(&host->h_count),
host->h_inuse, host->h_expires);
q = &host->h_next;
continue;