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37 #define DEBUG_SUBSYSTEM S_LNET
38 #include "../../include/linux/lnet/lib-lnet.h"
40 static int config_on_load;
41 module_param(config_on_load, int, 0444);
42 MODULE_PARM_DESC(config_on_load, "configure network at module load");
44 static struct mutex lnet_config_mutex;
47 lnet_configure(void *arg)
49 /* 'arg' only there so I can be passed to cfs_create_thread() */
52 mutex_lock(&lnet_config_mutex);
54 if (!the_lnet.ln_niinit_self) {
55 rc = LNetNIInit(LUSTRE_SRV_LNET_PID);
57 the_lnet.ln_niinit_self = 1;
62 mutex_unlock(&lnet_config_mutex);
67 lnet_unconfigure(void)
71 mutex_lock(&lnet_config_mutex);
73 if (the_lnet.ln_niinit_self) {
74 the_lnet.ln_niinit_self = 0;
78 mutex_lock(&the_lnet.ln_api_mutex);
79 refcount = the_lnet.ln_refcount;
80 mutex_unlock(&the_lnet.ln_api_mutex);
82 mutex_unlock(&lnet_config_mutex);
83 return (refcount == 0) ? 0 : -EBUSY;
87 lnet_ioctl(unsigned int cmd, struct libcfs_ioctl_data *data)
92 case IOC_LIBCFS_CONFIGURE:
93 return lnet_configure(NULL);
95 case IOC_LIBCFS_UNCONFIGURE:
96 return lnet_unconfigure();
99 /* Passing LNET_PID_ANY only gives me a ref if the net is up
100 * already; I'll need it to ensure the net can't go down while
101 * I'm called into it */
102 rc = LNetNIInit(LNET_PID_ANY);
104 rc = LNetCtl(cmd, data);
111 static DECLARE_IOCTL_HANDLER(lnet_ioctl_handler, lnet_ioctl);
118 mutex_init(&lnet_config_mutex);
122 CERROR("lnet_init: error %d\n", rc);
126 rc = libcfs_register_ioctl(&lnet_ioctl_handler);
129 if (config_on_load) {
130 /* Have to schedule a separate thread to avoid deadlocking
132 (void) kthread_run(lnet_configure, NULL, "lnet_initd");
143 rc = libcfs_deregister_ioctl(&lnet_ioctl_handler);
149 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
150 MODULE_DESCRIPTION("LNet v3.1");
151 MODULE_LICENSE("GPL");
152 MODULE_VERSION("1.0.0");
154 module_init(init_lnet);
155 module_exit(fini_lnet);