4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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13 * General Public License version 2 for more details (a copy is included
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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33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
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 = try_module_get(THIS_MODULE);
61 rc = LNetNIInit(LNET_PID_LUSTRE);
63 the_lnet.ln_niinit_self = 1;
66 module_put(THIS_MODULE);
71 LNET_MUTEX_UNLOCK(&lnet_config_mutex);
76 lnet_unconfigure (void)
80 LNET_MUTEX_LOCK(&lnet_config_mutex);
82 if (the_lnet.ln_niinit_self) {
83 the_lnet.ln_niinit_self = 0;
85 module_put(THIS_MODULE);
88 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
89 refcount = the_lnet.ln_refcount;
90 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
92 LNET_MUTEX_UNLOCK(&lnet_config_mutex);
94 return (refcount == 0) ? 0 : -EBUSY;
98 lnet_dyn_configure(struct libcfs_ioctl_hdr *hdr)
100 struct lnet_ioctl_config_data *conf =
101 (struct lnet_ioctl_config_data *)hdr;
104 LNET_MUTEX_LOCK(&lnet_config_mutex);
105 if (the_lnet.ln_niinit_self)
106 rc = lnet_dyn_add_ni(LNET_PID_LUSTRE,
107 conf->cfg_config_u.cfg_net.net_intf,
108 conf->cfg_config_u.cfg_net.
110 conf->cfg_config_u.cfg_net.
112 conf->cfg_config_u.cfg_net.
113 net_peer_rtr_credits,
114 conf->cfg_config_u.cfg_net.
118 LNET_MUTEX_UNLOCK(&lnet_config_mutex);
123 lnet_dyn_unconfigure(struct libcfs_ioctl_hdr *hdr)
125 struct lnet_ioctl_config_data *conf =
126 (struct lnet_ioctl_config_data *) hdr;
129 LNET_MUTEX_LOCK(&lnet_config_mutex);
130 if (the_lnet.ln_niinit_self)
131 rc = lnet_dyn_del_ni(conf->cfg_net);
134 LNET_MUTEX_UNLOCK(&lnet_config_mutex);
140 lnet_ioctl(unsigned int cmd, struct libcfs_ioctl_hdr *hdr)
145 case IOC_LIBCFS_CONFIGURE: {
146 struct libcfs_ioctl_data *data =
147 (struct libcfs_ioctl_data *)hdr;
148 the_lnet.ln_nis_from_mod_params = data->ioc_flags;
149 return lnet_configure(NULL);
152 case IOC_LIBCFS_UNCONFIGURE:
153 return lnet_unconfigure();
155 case IOC_LIBCFS_ADD_NET:
156 return lnet_dyn_configure(hdr);
158 case IOC_LIBCFS_DEL_NET:
159 return lnet_dyn_unconfigure(hdr);
162 /* Passing LNET_PID_ANY only gives me a ref if the net is up
163 * already; I'll need it to ensure the net can't go down while
164 * I'm called into it */
165 rc = LNetNIInit(LNET_PID_ANY);
167 rc = LNetCtl(cmd, hdr);
174 DECLARE_IOCTL_HANDLER(lnet_ioctl_handler, lnet_ioctl);
177 lnet_module_init(void)
182 mutex_init(&lnet_config_mutex);
186 CERROR("lnet_init: error %d\n", rc);
190 rc = libcfs_register_ioctl(&lnet_ioctl_handler);
193 if (config_on_load) {
194 /* Have to schedule a separate thread to avoid deadlocking
196 (void) kthread_run(lnet_configure, NULL, "lnet_initd");
203 lnet_module_exit(void)
207 rc = libcfs_deregister_ioctl(&lnet_ioctl_handler);
213 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
214 MODULE_DESCRIPTION("LNet v3.1");
215 MODULE_VERSION("1.0.0");
216 MODULE_LICENSE("GPL");
218 module_init(lnet_module_init);
219 module_exit(lnet_module_exit);