#include <linux/sunrpc/svcsock.h>
#include <net/ip.h>
#include <linux/lockd/lockd.h>
-#include <linux/lockd/sm_inter.h>
#include <linux/nfs.h>
#define NLMDBG_FACILITY NLMDBG_SVC
static struct svc_program nlmsvc_program;
struct nlmsvc_binding * nlmsvc_ops;
-EXPORT_SYMBOL(nlmsvc_ops);
+EXPORT_SYMBOL_GPL(nlmsvc_ops);
static DEFINE_MUTEX(nlmsvc_mutex);
static unsigned int nlmsvc_users;
static struct task_struct *nlmsvc_task;
-static struct svc_serv *nlmsvc_serv;
-int nlmsvc_grace_period;
+static struct svc_rqst *nlmsvc_rqst;
unsigned long nlmsvc_timeout;
/*
static unsigned long nlm_grace_period;
static unsigned long nlm_timeout = LOCKD_DFLT_TIMEO;
static int nlm_udpport, nlm_tcpport;
-int nsm_use_hostnames = 0;
+
+/* RLIM_NOFILE defaults to 1024. That seems like a reasonable default here. */
+static unsigned int nlm_max_connections = 1024;
/*
* Constants needed for the sysctl interface.
static const unsigned long nlm_timeout_max = 20;
static const int nlm_port_min = 0, nlm_port_max = 65535;
+#ifdef CONFIG_SYSCTL
static struct ctl_table_header * nlm_sysctl_table;
+#endif
static unsigned long get_lockd_grace_period(void)
{
return nlm_timeout * 5 * HZ;
}
-unsigned long get_nfs_grace_period(void)
-{
- unsigned long lockdgrace = get_lockd_grace_period();
- unsigned long nfsdgrace = 0;
-
- if (nlmsvc_ops)
- nfsdgrace = nlmsvc_ops->get_grace_period();
+static struct lock_manager lockd_manager = {
+};
- return max(lockdgrace, nfsdgrace);
+static void grace_ender(struct work_struct *not_used)
+{
+ locks_end_grace(&lockd_manager);
}
-EXPORT_SYMBOL(get_nfs_grace_period);
-static unsigned long set_grace_period(void)
+static DECLARE_DELAYED_WORK(grace_period_end, grace_ender);
+
+static void set_grace_period(void)
{
- nlmsvc_grace_period = 1;
- return get_nfs_grace_period() + jiffies;
+ unsigned long grace_period = get_lockd_grace_period();
+
+ locks_start_grace(&lockd_manager);
+ cancel_delayed_work_sync(&grace_period_end);
+ schedule_delayed_work(&grace_period_end, grace_period);
}
-static inline void clear_grace_period(void)
+static void restart_grace(void)
{
- nlmsvc_grace_period = 0;
+ if (nlmsvc_ops) {
+ cancel_delayed_work_sync(&grace_period_end);
+ locks_end_grace(&lockd_manager);
+ nlmsvc_invalidate_all();
+ set_grace_period();
+ }
}
/*
{
int err = 0, preverr = 0;
struct svc_rqst *rqstp = vrqstp;
- unsigned long grace_period_expire;
/* try_to_freeze() is called from svc_recv() */
set_freezable();
nlm_timeout = LOCKD_DFLT_TIMEO;
nlmsvc_timeout = nlm_timeout * HZ;
- grace_period_expire = set_grace_period();
+ set_grace_period();
/*
* The main request loop. We don't terminate until the last
long timeout = MAX_SCHEDULE_TIMEOUT;
RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
+ /* update sv_maxconn if it has changed */
+ rqstp->rq_server->sv_maxconn = nlm_max_connections;
+
if (signalled()) {
flush_signals(current);
- if (nlmsvc_ops) {
- nlmsvc_invalidate_all();
- grace_period_expire = set_grace_period();
- }
+ restart_grace();
continue;
}
- /*
- * Retry any blocked locks that have been notified by
- * the VFS. Don't do this during grace period.
- * (Theoretically, there shouldn't even be blocked locks
- * during grace period).
- */
- if (!nlmsvc_grace_period) {
- timeout = nlmsvc_retry_blocked();
- } else if (time_before(grace_period_expire, jiffies))
- clear_grace_period();
+ timeout = nlmsvc_retry_blocked();
/*
* Find a socket with data available and call its
svc_process(rqstp);
}
-
flush_signals(current);
+ cancel_delayed_work_sync(&grace_period_end);
+ locks_end_grace(&lockd_manager);
if (nlmsvc_ops)
nlmsvc_invalidate_all();
nlm_shutdown_hosts();
-
unlock_kernel();
+ return 0;
+}
- nlmsvc_task = NULL;
- nlmsvc_serv = NULL;
-
- /* Exit the RPC thread */
- svc_exit_thread(rqstp);
+static int create_lockd_listener(struct svc_serv *serv, const char *name,
+ const int family, const unsigned short port)
+{
+ struct svc_xprt *xprt;
+ xprt = svc_find_xprt(serv, name, family, 0);
+ if (xprt == NULL)
+ return svc_create_xprt(serv, name, family, port,
+ SVC_SOCK_DEFAULTS);
+ svc_xprt_put(xprt);
return 0;
}
+static int create_lockd_family(struct svc_serv *serv, const int family)
+{
+ int err;
+
+ err = create_lockd_listener(serv, "udp", family, nlm_udpport);
+ if (err < 0)
+ return err;
+
+ return create_lockd_listener(serv, "tcp", family, nlm_tcpport);
+}
+
/*
- * Make any sockets that are needed but not present.
- * If nlm_udpport or nlm_tcpport were set as module
- * options, make those sockets unconditionally
+ * Ensure there are active UDP and TCP listeners for lockd.
+ *
+ * Even if we have only TCP NFS mounts and/or TCP NFSDs, some
+ * local services (such as rpc.statd) still require UDP, and
+ * some NFS servers do not yet support NLM over TCP.
+ *
+ * Returns zero if all listeners are available; otherwise a
+ * negative errno value is returned.
*/
-static int make_socks(struct svc_serv *serv, int proto)
+static int make_socks(struct svc_serv *serv)
{
static int warned;
- struct svc_xprt *xprt;
- int err = 0;
-
- if (proto == IPPROTO_UDP || nlm_udpport) {
- xprt = svc_find_xprt(serv, "udp", 0, 0);
- if (!xprt)
- err = svc_create_xprt(serv, "udp", nlm_udpport,
- SVC_SOCK_DEFAULTS);
- else
- svc_xprt_put(xprt);
- }
- if (err >= 0 && (proto == IPPROTO_TCP || nlm_tcpport)) {
- xprt = svc_find_xprt(serv, "tcp", 0, 0);
- if (!xprt)
- err = svc_create_xprt(serv, "tcp", nlm_tcpport,
- SVC_SOCK_DEFAULTS);
- else
- svc_xprt_put(xprt);
- }
- if (err >= 0) {
- warned = 0;
- err = 0;
- } else if (warned++ == 0)
+ int err;
+
+ err = create_lockd_family(serv, PF_INET);
+ if (err < 0)
+ goto out_err;
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ err = create_lockd_family(serv, PF_INET6);
+ if (err < 0 && err != -EAFNOSUPPORT)
+ goto out_err;
+#endif /* CONFIG_IPV6 || CONFIG_IPV6_MODULE */
+
+ warned = 0;
+ return 0;
+
+out_err:
+ if (warned++ == 0)
printk(KERN_WARNING
- "lockd_up: makesock failed, error=%d\n", err);
+ "lockd_up: makesock failed, error=%d\n", err);
return err;
}
/*
* Bring up the lockd process if it's not already up.
*/
-int
-lockd_up(int proto) /* Maybe add a 'family' option when IPv6 is supported ?? */
+int lockd_up(void)
{
struct svc_serv *serv;
- struct svc_rqst *rqstp;
int error = 0;
mutex_lock(&nlmsvc_mutex);
/*
* Check whether we're already up and running.
*/
- if (nlmsvc_serv) {
- if (proto)
- error = make_socks(nlmsvc_serv, proto);
+ if (nlmsvc_rqst)
goto out;
- }
/*
* Sanity check: if there's no pid,
goto out;
}
- if ((error = make_socks(serv, proto)) < 0)
+ error = make_socks(serv);
+ if (error < 0)
goto destroy_and_out;
/*
* Create the kernel thread and wait for it to start.
*/
- rqstp = svc_prepare_thread(serv, &serv->sv_pools[0]);
- if (IS_ERR(rqstp)) {
- error = PTR_ERR(rqstp);
+ nlmsvc_rqst = svc_prepare_thread(serv, &serv->sv_pools[0]);
+ if (IS_ERR(nlmsvc_rqst)) {
+ error = PTR_ERR(nlmsvc_rqst);
+ nlmsvc_rqst = NULL;
printk(KERN_WARNING
"lockd_up: svc_rqst allocation failed, error=%d\n",
error);
}
svc_sock_update_bufs(serv);
- nlmsvc_serv = rqstp->rq_server;
+ serv->sv_maxconn = nlm_max_connections;
- nlmsvc_task = kthread_run(lockd, rqstp, serv->sv_name);
+ nlmsvc_task = kthread_run(lockd, nlmsvc_rqst, serv->sv_name);
if (IS_ERR(nlmsvc_task)) {
error = PTR_ERR(nlmsvc_task);
+ svc_exit_thread(nlmsvc_rqst);
nlmsvc_task = NULL;
- nlmsvc_serv = NULL;
+ nlmsvc_rqst = NULL;
printk(KERN_WARNING
"lockd_up: kthread_run failed, error=%d\n", error);
- svc_exit_thread(rqstp);
goto destroy_and_out;
}
mutex_unlock(&nlmsvc_mutex);
return error;
}
-EXPORT_SYMBOL(lockd_up);
+EXPORT_SYMBOL_GPL(lockd_up);
/*
* Decrement the user count and bring down lockd if we're the last.
BUG();
}
kthread_stop(nlmsvc_task);
+ svc_exit_thread(nlmsvc_rqst);
+ nlmsvc_task = NULL;
+ nlmsvc_rqst = NULL;
out:
mutex_unlock(&nlmsvc_mutex);
}
-EXPORT_SYMBOL(lockd_down);
+EXPORT_SYMBOL_GPL(lockd_down);
+
+#ifdef CONFIG_SYSCTL
/*
* Sysctl parameters (same as module parameters, different interface).
{ .ctl_name = 0 }
};
+#endif /* CONFIG_SYSCTL */
+
/*
* Module (and sysfs) parameters.
*/
module_param_call(nlm_tcpport, param_set_port, param_get_int,
&nlm_tcpport, 0644);
module_param(nsm_use_hostnames, bool, 0644);
+module_param(nlm_max_connections, uint, 0644);
/*
* Initialising and terminating the module.
static int __init init_nlm(void)
{
+#ifdef CONFIG_SYSCTL
nlm_sysctl_table = register_sysctl_table(nlm_sysctl_root);
return nlm_sysctl_table ? 0 : -ENOMEM;
+#else
+ return 0;
+#endif
}
static void __exit exit_nlm(void)
{
/* FIXME: delete all NLM clients */
nlm_shutdown_hosts();
+#ifdef CONFIG_SYSCTL
unregister_sysctl_table(nlm_sysctl_table);
+#endif
}
module_init(init_nlm);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff