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14 * in the LICENSE file that accompanied this code).
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21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
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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_dyn_configure(struct libcfs_ioctl_hdr *hdr)
90 struct lnet_ioctl_config_data *conf =
91 (struct lnet_ioctl_config_data *)hdr;
94 LNET_MUTEX_LOCK(&lnet_config_mutex);
95 if (the_lnet.ln_niinit_self)
96 rc = lnet_dyn_add_ni(LUSTRE_SRV_LNET_PID,
97 conf->cfg_config_u.cfg_net.net_intf,
98 conf->cfg_config_u.cfg_net.
100 conf->cfg_config_u.cfg_net.
102 conf->cfg_config_u.cfg_net.
103 net_peer_rtr_credits,
104 conf->cfg_config_u.cfg_net.
108 LNET_MUTEX_UNLOCK(&lnet_config_mutex);
113 lnet_dyn_unconfigure(struct libcfs_ioctl_hdr *hdr)
115 struct lnet_ioctl_config_data *conf =
116 (struct lnet_ioctl_config_data *) hdr;
119 LNET_MUTEX_LOCK(&lnet_config_mutex);
120 if (the_lnet.ln_niinit_self)
121 rc = lnet_dyn_del_ni(conf->cfg_net);
124 LNET_MUTEX_UNLOCK(&lnet_config_mutex);
130 lnet_ioctl(unsigned int cmd, struct libcfs_ioctl_hdr *hdr)
135 case IOC_LIBCFS_CONFIGURE: {
136 struct libcfs_ioctl_data *data =
137 (struct libcfs_ioctl_data *)hdr;
138 the_lnet.ln_nis_from_mod_params = data->ioc_flags;
139 return lnet_configure(NULL);
142 case IOC_LIBCFS_UNCONFIGURE:
143 return lnet_unconfigure();
145 case IOC_LIBCFS_ADD_NET:
146 return lnet_dyn_configure(hdr);
148 case IOC_LIBCFS_DEL_NET:
149 return lnet_dyn_unconfigure(hdr);
152 /* Passing LNET_PID_ANY only gives me a ref if the net is up
153 * already; I'll need it to ensure the net can't go down while
154 * I'm called into it */
155 rc = LNetNIInit(LNET_PID_ANY);
157 rc = LNetCtl(cmd, hdr);
164 DECLARE_IOCTL_HANDLER(lnet_ioctl_handler, lnet_ioctl);
172 mutex_init(&lnet_config_mutex);
176 CERROR("LNetInit: error %d\n", rc);
180 rc = libcfs_register_ioctl(&lnet_ioctl_handler);
183 if (config_on_load) {
184 /* Have to schedule a separate thread to avoid deadlocking
186 (void) kthread_run(lnet_configure, NULL, "lnet_initd");
197 rc = libcfs_deregister_ioctl(&lnet_ioctl_handler);
203 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
204 MODULE_DESCRIPTION("Portals v3.1");
205 MODULE_LICENSE("GPL");
207 cfs_module(lnet, "1.0.0", init_lnet, fini_lnet);