#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;
}
}
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 (host != NULL) {
dprintk("lockd: release host %s\n", host->h_name);
- atomic_dec(&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) {
rpc_destroy_client(host->h_rpcclnt);
}
}
- BUG_ON(!list_empty(&host->h_lockowners));
kfree(host);
nrhosts--;
}