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37 #define DEBUG_SUBSYSTEM S_LNET
38 #include <lnet/lib-lnet.h>
39 #include <lnet/lib-dlc.h>
41 static int config_on_load = 0;
42 CFS_MODULE_PARM(config_on_load, "i", int, 0444,
43 "configure network at module load");
45 static struct mutex lnet_config_mutex;
48 lnet_configure (void *arg)
50 /* 'arg' only there so I can be passed to cfs_create_thread() */
53 LNET_MUTEX_LOCK(&lnet_config_mutex);
55 if (!the_lnet.ln_niinit_self) {
56 rc = LNetNIInit(LUSTRE_SRV_LNET_PID);
58 the_lnet.ln_niinit_self = 1;
63 LNET_MUTEX_UNLOCK(&lnet_config_mutex);
68 lnet_unconfigure (void)
72 LNET_MUTEX_LOCK(&lnet_config_mutex);
74 if (the_lnet.ln_niinit_self) {
75 the_lnet.ln_niinit_self = 0;
79 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
80 refcount = the_lnet.ln_refcount;
81 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
83 LNET_MUTEX_UNLOCK(&lnet_config_mutex);
84 return (refcount == 0) ? 0 : -EBUSY;
88 lnet_ioctl(unsigned int cmd, struct libcfs_ioctl_hdr *hdr)
93 case IOC_LIBCFS_CONFIGURE:
94 return lnet_configure(NULL);
96 case IOC_LIBCFS_UNCONFIGURE:
97 return lnet_unconfigure();
99 case IOC_LIBCFS_ADD_NET:
100 return LNetCtl(cmd, hdr);
103 /* Passing LNET_PID_ANY only gives me a ref if the net is up
104 * already; I'll need it to ensure the net can't go down while
105 * I'm called into it */
106 rc = LNetNIInit(LNET_PID_ANY);
108 rc = LNetCtl(cmd, hdr);
115 DECLARE_IOCTL_HANDLER(lnet_ioctl_handler, lnet_ioctl);
123 mutex_init(&lnet_config_mutex);
127 CERROR("LNetInit: error %d\n", rc);
131 rc = libcfs_register_ioctl(&lnet_ioctl_handler);
134 if (config_on_load) {
135 /* Have to schedule a separate thread to avoid deadlocking
137 (void) kthread_run(lnet_configure, NULL, "lnet_initd");
148 rc = libcfs_deregister_ioctl(&lnet_ioctl_handler);
154 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
155 MODULE_DESCRIPTION("Portals v3.1");
156 MODULE_LICENSE("GPL");
158 cfs_module(lnet, "1.0.0", init_lnet, fini_lnet);