lnet/lnet/module.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Copyright (C) 2001, 2002 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of Lustre, http://www.lustre.org.
   7  *
   8  *   Lustre is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Lustre is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Lustre; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #ifndef EXPORT_SYMTAB
  23 # define EXPORT_SYMTAB
  24 #endif
  25 #define DEBUG_SUBSYSTEM S_PORTALS
  26
  27 #include <linux/config.h>
  28 #include <linux/module.h>
  29 #include <linux/kernel.h>
  30 #include <linux/mm.h>
  31 #include <linux/string.h>
  32 #include <linux/stat.h>
  33 #include <linux/init.h>
  34 #include <linux/errno.h>
  35 #include <linux/smp_lock.h>
  36 #include <linux/unistd.h>
  37
  38 #include <asm/system.h>
  39 #include <asm/uaccess.h>
  40
  41 #include <linux/fs.h>
  42 #include <linux/stat.h>
  43 #include <asm/uaccess.h>
  44 #include <asm/segment.h>
  45 #include <linux/miscdevice.h>
  46
  47 #include <portals/lib-p30.h>
  48 #include <portals/p30.h>
  49 #include <portals/nal.h>
  50 #include <linux/kp30.h>
  51 #include <linux/kpr.h>
  52 #include <linux/portals_compat25.h>
  53
  54 extern void (kping_client)(struct portal_ioctl_data *);
  55
  56 static int kportal_ioctl(struct portal_ioctl_data *data,
  57                          unsigned int cmd, unsigned long arg)
  58 {
  59         int err;
  60         char str[PTL_NALFMT_SIZE];
  61         ENTRY;
  62
  63         switch (cmd) {
  64         case IOC_PORTAL_PING: {
  65                 void (*ping)(struct portal_ioctl_data *);
  66
  67                 CDEBUG(D_IOCTL, "doing %d pings to nid "LPX64" (%s)\n",
  68                        data->ioc_count, data->ioc_nid,
  69                        portals_nid2str(data->ioc_nal, data->ioc_nid, str));
  70                 ping = PORTAL_SYMBOL_GET(kping_client);
  71                 if (!ping)
  72                         CERROR("PORTAL_SYMBOL_GET failed\n");
  73                 else {
  74                         ping(data);
  75                         PORTAL_SYMBOL_PUT(kping_client);
  76                 }
  77                 RETURN(0);
  78         }
  79
  80         case IOC_PORTAL_GET_NID: {
  81                 ptl_handle_ni_t    nih;
  82                 ptl_process_id_t   pid;
  83
  84                 CDEBUG (D_IOCTL, "Getting nid for nal [%d]\n", data->ioc_nal);
  85
  86                 err = PtlNIInit(data->ioc_nal, 0, NULL, NULL, &nih);
  87                 if (!(err == PTL_OK || err == PTL_IFACE_DUP))
  88                         RETURN (-EINVAL);
  89
  90                 err = PtlGetId (nih, &pid);
  91                 LASSERT (err == PTL_OK);
  92
  93                 PtlNIFini(nih);
  94
  95                 data->ioc_nid = pid.nid;
  96                 if (copy_to_user ((char *)arg, data, sizeof (*data)))
  97                         RETURN (-EFAULT);
  98                 RETURN(0);
  99         }
 100
 101         case IOC_PORTAL_FAIL_NID: {
 102                 ptl_handle_ni_t    nih;
 103
 104                 CDEBUG (D_IOCTL, "fail nid: [%d] "LPU64" count %d\n",
 105                         data->ioc_nal, data->ioc_nid, data->ioc_count);
 106
 107                 err = PtlNIInit(data->ioc_nal, 0, NULL, NULL, &nih);
 108                 if (!(err == PTL_OK || err == PTL_IFACE_DUP))
 109                         return (-EINVAL);
 110
 111                 if (err == PTL_OK) {
 112                         /* There's no point in failing an interface that
 113                          * came into existance just for this */
 114                         err = -EINVAL;
 115                 } else {
 116                         err = PtlFailNid (nih, data->ioc_nid, data->ioc_count);
 117                         if (err != PTL_OK)
 118                                 err = -EINVAL;
 119                 }
 120
 121                 PtlNIFini(nih);
 122                 RETURN (err);
 123         }
 124         default:
 125                 RETURN(-EINVAL);
 126         }
 127         /* Not Reached */
 128 }
 129
 130 DECLARE_IOCTL_HANDLER(kportal_ioctl_handler, kportal_ioctl);
 131
 132 static int init_kportals_module(void)
 133 {
 134         int rc;
 135         ENTRY;
 136
 137         rc = PtlInit(NULL);
 138         if (rc) {
 139                 CERROR("PtlInit: error %d\n", rc);
 140                 RETURN(rc);
 141         }
 142
 143         rc = libcfs_register_ioctl(&kportal_ioctl_handler);
 144         LASSERT (rc == 0);
 145
 146         RETURN(rc);
 147 }
 148
 149 static void exit_kportals_module(void)
 150 {
 151         int rc;
 152
 153         rc = libcfs_deregister_ioctl(&kportal_ioctl_handler);
 154         LASSERT (rc == 0);
 155
 156         PtlFini();
 157 }
 158
 159 EXPORT_SYMBOL(ptl_register_nal);
 160 EXPORT_SYMBOL(ptl_unregister_nal);
 161
 162 EXPORT_SYMBOL(ptl_err_str);
 163 EXPORT_SYMBOL(PtlMEAttach);
 164 EXPORT_SYMBOL(PtlMEInsert);
 165 EXPORT_SYMBOL(PtlMEUnlink);
 166 EXPORT_SYMBOL(PtlEQAlloc);
 167 EXPORT_SYMBOL(PtlMDAttach);
 168 EXPORT_SYMBOL(PtlMDUnlink);
 169 EXPORT_SYMBOL(PtlNIInit);
 170 EXPORT_SYMBOL(PtlNIFini);
 171 EXPORT_SYMBOL(PtlInit);
 172 EXPORT_SYMBOL(PtlFini);
 173 EXPORT_SYMBOL(PtlSnprintHandle);
 174 EXPORT_SYMBOL(PtlPut);
 175 EXPORT_SYMBOL(PtlGet);
 176 EXPORT_SYMBOL(PtlEQWait);
 177 EXPORT_SYMBOL(PtlEQFree);
 178 EXPORT_SYMBOL(PtlEQGet);
 179 EXPORT_SYMBOL(PtlGetId);
 180 EXPORT_SYMBOL(PtlMDBind);
 181 EXPORT_SYMBOL(lib_iov_nob);
 182 EXPORT_SYMBOL(lib_copy_iov2buf);
 183 EXPORT_SYMBOL(lib_copy_buf2iov);
 184 EXPORT_SYMBOL(lib_extract_iov);
 185 EXPORT_SYMBOL(lib_kiov_nob);
 186 EXPORT_SYMBOL(lib_copy_kiov2buf);
 187 EXPORT_SYMBOL(lib_copy_buf2kiov);
 188 EXPORT_SYMBOL(lib_extract_kiov);
 189 EXPORT_SYMBOL(lib_finalize);
 190 EXPORT_SYMBOL(lib_parse);
 191 EXPORT_SYMBOL(lib_create_reply_msg);
 192 EXPORT_SYMBOL(lib_init);
 193 EXPORT_SYMBOL(lib_fini);
 194
 195 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
 196 MODULE_DESCRIPTION("Portals v3.1");
 197 MODULE_LICENSE("GPL");
 198 module_init(init_kportals_module);
 199 module_exit(exit_kportals_module);