diff options
Diffstat (limited to 'drivers/staging/lustre/lnet/lnet/module.c')
| -rw-r--r-- | drivers/staging/lustre/lnet/lnet/module.c | 239 |
1 files changed, 0 insertions, 239 deletions
diff --git a/drivers/staging/lustre/lnet/lnet/module.c b/drivers/staging/lustre/lnet/lnet/module.c deleted file mode 100644 index 9d06664..0000000 --- a/drivers/staging/lustre/lnet/lnet/module.c +++ /dev/null @@ -1,239 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * GPL HEADER START - * - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 only, - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License version 2 for more details (a copy is included - * in the LICENSE file that accompanied this code). - * - * You should have received a copy of the GNU General Public License - * version 2 along with this program; If not, see - * http://www.gnu.org/licenses/gpl-2.0.html - * - * GPL HEADER END - */ -/* - * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - * - * Copyright (c) 2012, 2015, Intel Corporation. - */ -/* - * This file is part of Lustre, http://www.lustre.org/ - * Lustre is a trademark of Sun Microsystems, Inc. - */ - -#define DEBUG_SUBSYSTEM S_LNET - -#include <linux/lnet/lib-lnet.h> -#include <uapi/linux/lnet/lnet-dlc.h> - -static int config_on_load; -module_param(config_on_load, int, 0444); -MODULE_PARM_DESC(config_on_load, "configure network at module load"); - -static struct mutex lnet_config_mutex; - -static int -lnet_configure(void *arg) -{ - /* 'arg' only there so I can be passed to cfs_create_thread() */ - int rc = 0; - - mutex_lock(&lnet_config_mutex); - - if (!the_lnet.ln_niinit_self) { - rc = try_module_get(THIS_MODULE); - - if (rc != 1) - goto out; - - rc = LNetNIInit(LNET_PID_LUSTRE); - if (rc >= 0) { - the_lnet.ln_niinit_self = 1; - rc = 0; - } else { - module_put(THIS_MODULE); - } - } - -out: - mutex_unlock(&lnet_config_mutex); - return rc; -} - -static int -lnet_unconfigure(void) -{ - int refcount; - - mutex_lock(&lnet_config_mutex); - - if (the_lnet.ln_niinit_self) { - the_lnet.ln_niinit_self = 0; - LNetNIFini(); - module_put(THIS_MODULE); - } - - mutex_lock(&the_lnet.ln_api_mutex); - refcount = the_lnet.ln_refcount; - mutex_unlock(&the_lnet.ln_api_mutex); - - mutex_unlock(&lnet_config_mutex); - return !refcount ? 0 : -EBUSY; -} - -static int -lnet_dyn_configure(struct libcfs_ioctl_hdr *hdr) -{ - struct lnet_ioctl_config_data *conf = - (struct lnet_ioctl_config_data *)hdr; - int rc; - - if (conf->cfg_hdr.ioc_len < sizeof(*conf)) - return -EINVAL; - - mutex_lock(&lnet_config_mutex); - if (!the_lnet.ln_niinit_self) { - rc = -EINVAL; - goto out_unlock; - } - rc = lnet_dyn_add_ni(LNET_PID_LUSTRE, conf); -out_unlock: - mutex_unlock(&lnet_config_mutex); - - return rc; -} - -static int -lnet_dyn_unconfigure(struct libcfs_ioctl_hdr *hdr) -{ - struct lnet_ioctl_config_data *conf = - (struct lnet_ioctl_config_data *)hdr; - int rc; - - if (conf->cfg_hdr.ioc_len < sizeof(*conf)) - return -EINVAL; - - mutex_lock(&lnet_config_mutex); - if (!the_lnet.ln_niinit_self) { - rc = -EINVAL; - goto out_unlock; - } - rc = lnet_dyn_del_ni(conf->cfg_net); -out_unlock: - mutex_unlock(&lnet_config_mutex); - - return rc; -} - -static int -lnet_ioctl(struct notifier_block *nb, - unsigned long cmd, void *vdata) -{ - int rc; - struct libcfs_ioctl_hdr *hdr = vdata; - - switch (cmd) { - case IOC_LIBCFS_CONFIGURE: { - struct libcfs_ioctl_data *data = - (struct libcfs_ioctl_data *)hdr; - - if (data->ioc_hdr.ioc_len < sizeof(*data)) { - rc = -EINVAL; - } else { - the_lnet.ln_nis_from_mod_params = data->ioc_flags; - rc = lnet_configure(NULL); - } - break; - } - - case IOC_LIBCFS_UNCONFIGURE: - rc = lnet_unconfigure(); - break; - - case IOC_LIBCFS_ADD_NET: - rc = lnet_dyn_configure(hdr); - break; - - case IOC_LIBCFS_DEL_NET: - rc = lnet_dyn_unconfigure(hdr); - break; - - default: - /* - * Passing LNET_PID_ANY only gives me a ref if the net is up - * already; I'll need it to ensure the net can't go down while - * I'm called into it - */ - rc = LNetNIInit(LNET_PID_ANY); - if (rc >= 0) { - rc = LNetCtl(cmd, hdr); - LNetNIFini(); - } - break; - } - return notifier_from_ioctl_errno(rc); -} - -static struct notifier_block lnet_ioctl_handler = { - .notifier_call = lnet_ioctl, -}; - -static int __init lnet_init(void) -{ - int rc; - - mutex_init(&lnet_config_mutex); - - rc = libcfs_setup(); - if (rc) - return rc; - - rc = lnet_lib_init(); - if (rc) { - CERROR("lnet_lib_init: error %d\n", rc); - return rc; - } - - rc = blocking_notifier_chain_register(&libcfs_ioctl_list, - &lnet_ioctl_handler); - LASSERT(!rc); - - if (config_on_load) { - /* - * Have to schedule a separate thread to avoid deadlocking - * in modload - */ - (void)kthread_run(lnet_configure, NULL, "lnet_initd"); - } - - return 0; -} - -static void __exit lnet_exit(void) -{ - int rc; - - rc = blocking_notifier_chain_unregister(&libcfs_ioctl_list, - &lnet_ioctl_handler); - LASSERT(!rc); - - lnet_lib_exit(); -} - -MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>"); -MODULE_DESCRIPTION("Lustre Networking layer"); -MODULE_VERSION(LNET_VERSION); -MODULE_LICENSE("GPL"); - -module_init(lnet_init); -module_exit(lnet_exit); |
