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35 #define DEBUG_SUBSYSTEM S_LNET
36 #include <lnet/lib-lnet.h>
38 static int config_on_load = 0;
39 CFS_MODULE_PARM(config_on_load, "i", int, 0444,
40 "configure network at module load");
42 static cfs_mutex_t lnet_config_mutex;
45 lnet_configure (void *arg)
47 /* 'arg' only there so I can be passed to cfs_create_thread() */
50 LNET_MUTEX_LOCK(&lnet_config_mutex);
52 if (!the_lnet.ln_niinit_self) {
53 rc = LNetNIInit(LUSTRE_SRV_LNET_PID);
55 the_lnet.ln_niinit_self = 1;
60 LNET_MUTEX_UNLOCK(&lnet_config_mutex);
65 lnet_unconfigure (void)
69 LNET_MUTEX_LOCK(&lnet_config_mutex);
71 if (the_lnet.ln_niinit_self) {
72 the_lnet.ln_niinit_self = 0;
76 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
77 refcount = the_lnet.ln_refcount;
78 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
80 LNET_MUTEX_UNLOCK(&lnet_config_mutex);
81 return (refcount == 0) ? 0 : -EBUSY;
85 lnet_ioctl(unsigned int cmd, struct libcfs_ioctl_data *data)
90 case IOC_LIBCFS_CONFIGURE:
91 return lnet_configure(NULL);
93 case IOC_LIBCFS_UNCONFIGURE:
94 return lnet_unconfigure();
97 /* Passing LNET_PID_ANY only gives me a ref if the net is up
98 * already; I'll need it to ensure the net can't go down while
99 * I'm called into it */
100 rc = LNetNIInit(LNET_PID_ANY);
102 rc = LNetCtl(cmd, data);
109 DECLARE_IOCTL_HANDLER(lnet_ioctl_handler, lnet_ioctl);
117 cfs_mutex_init(&lnet_config_mutex);
121 CERROR("LNetInit: error %d\n", rc);
125 rc = libcfs_register_ioctl(&lnet_ioctl_handler);
128 if (config_on_load) {
129 /* Have to schedule a separate thread to avoid deadlocking
131 (void) cfs_create_thread(lnet_configure, NULL, 0);
142 rc = libcfs_deregister_ioctl(&lnet_ioctl_handler);
148 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
149 MODULE_DESCRIPTION("Portals v3.1");
150 MODULE_LICENSE("GPL");
152 cfs_module(lnet, "1.0.0", init_lnet, fini_lnet);