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 #include <linux/lustre_idl.h>
  54
  55 extern void (kping_client)(struct portal_ioctl_data *);
  56
  57 static int kportal_ioctl(struct portal_ioctl_data *data,
  58                          unsigned int cmd, unsigned long arg)
  59 {
  60         int err;
  61         char str[PTL_NALFMT_SIZE];
  62         ENTRY;
  63
  64         switch (cmd) {
  65         case IOC_PORTAL_PING: {
  66                 void (*ping)(struct portal_ioctl_data *);
  67
  68                 CDEBUG(D_IOCTL, "doing %d pings to nid "LPX64" (%s)\n",
  69                        data->ioc_count, data->ioc_nid,
  70                        portals_nid2str(data->ioc_nal, data->ioc_nid, str));
  71                 ping = PORTAL_SYMBOL_GET(kping_client);
  72                 if (!ping)
  73                         CERROR("PORTAL_SYMBOL_GET failed\n");
  74                 else {
  75                         ping(data);
  76                         PORTAL_SYMBOL_PUT(kping_client);
  77                 }
  78                 RETURN(0);
  79         }
  80
  81         case IOC_PORTAL_GET_NID: {
  82                 ptl_handle_ni_t    nih;
  83                 ptl_process_id_t   pid;
  84
  85                 CDEBUG (D_IOCTL, "Getting nid for nal [%d]\n", data->ioc_nal);
  86
  87                 err = PtlNIInit(data->ioc_nal, LUSTRE_SRV_PTL_PID, NULL, NULL, &nih);
  88                 if (!(err == PTL_OK || err == PTL_IFACE_DUP))
  89                         RETURN (-EINVAL);
  90
  91                 err = PtlGetId (nih, &pid);
  92                 LASSERT (err == PTL_OK);
  93
  94                 PtlNIFini(nih);
  95
  96                 data->ioc_nid = pid.nid;
  97                 if (copy_to_user ((char *)arg, data, sizeof (*data)))
  98                         RETURN (-EFAULT);
  99                 RETURN(0);
 100         }
 101
 102         case IOC_PORTAL_FAIL_NID: {
 103                 ptl_handle_ni_t    nih;
 104
 105                 CDEBUG (D_IOCTL, "fail nid: [%d] "LPU64" count %d\n",
 106                         data->ioc_nal, data->ioc_nid, data->ioc_count);
 107
 108                 err = PtlNIInit(data->ioc_nal, LUSTRE_SRV_PTL_PID, NULL, NULL, &nih);
 109                 if (!(err == PTL_OK || err == PTL_IFACE_DUP))
 110                         return (-EINVAL);
 111
 112                 if (err == PTL_OK) {
 113                         /* There's no point in failing an interface that
 114                          * came into existance just for this */
 115                         err = -EINVAL;
 116                 } else {
 117                         err = PtlFailNid (nih, data->ioc_nid, data->ioc_count);
 118                         if (err != PTL_OK)
 119                                 err = -EINVAL;
 120                 }
 121
 122                 PtlNIFini(nih);
 123                 RETURN (err);
 124         }
 125         default:
 126                 RETURN(-EINVAL);
 127         }
 128         /* Not Reached */
 129 }
 130
 131 DECLARE_IOCTL_HANDLER(kportal_ioctl_handler, kportal_ioctl);
 132
 133 static int init_kportals_module(void)
 134 {
 135         int rc;
 136         ENTRY;
 137
 138         rc = PtlInit(NULL);
 139         if (rc) {
 140                 CERROR("PtlInit: error %d\n", rc);
 141                 RETURN(rc);
 142         }
 143
 144         rc = libcfs_register_ioctl(&kportal_ioctl_handler);
 145         LASSERT (rc == 0);
 146
 147         RETURN(rc);
 148 }
 149
 150 static void exit_kportals_module(void)
 151 {
 152         int rc;
 153
 154         rc = libcfs_deregister_ioctl(&kportal_ioctl_handler);
 155         LASSERT (rc == 0);
 156
 157         PtlFini();
 158 }
 159
 160 EXPORT_SYMBOL(ptl_register_nal);
 161 EXPORT_SYMBOL(ptl_unregister_nal);
 162
 163 EXPORT_SYMBOL(ptl_err_str);
 164 EXPORT_SYMBOL(PtlMEAttach);
 165 EXPORT_SYMBOL(PtlMEInsert);
 166 EXPORT_SYMBOL(PtlMEUnlink);
 167 EXPORT_SYMBOL(PtlEQAlloc);
 168 EXPORT_SYMBOL(PtlMDAttach);
 169 EXPORT_SYMBOL(PtlMDUnlink);
 170 EXPORT_SYMBOL(PtlNIInit);
 171 EXPORT_SYMBOL(PtlNIFini);
 172 EXPORT_SYMBOL(PtlInit);
 173 EXPORT_SYMBOL(PtlFini);
 174 EXPORT_SYMBOL(PtlSnprintHandle);
 175 EXPORT_SYMBOL(PtlPut);
 176 EXPORT_SYMBOL(PtlGet);
 177 EXPORT_SYMBOL(PtlEQWait);
 178 EXPORT_SYMBOL(PtlEQFree);
 179 EXPORT_SYMBOL(PtlEQGet);
 180 EXPORT_SYMBOL(PtlGetId);
 181 EXPORT_SYMBOL(PtlMDBind);
 182 EXPORT_SYMBOL(lib_iov_nob);
 183 EXPORT_SYMBOL(lib_copy_iov2buf);
 184 EXPORT_SYMBOL(lib_copy_buf2iov);
 185 EXPORT_SYMBOL(lib_extract_iov);
 186 EXPORT_SYMBOL(lib_kiov_nob);
 187 EXPORT_SYMBOL(lib_copy_kiov2buf);
 188 EXPORT_SYMBOL(lib_copy_buf2kiov);
 189 EXPORT_SYMBOL(lib_extract_kiov);
 190 EXPORT_SYMBOL(lib_finalize);
 191 EXPORT_SYMBOL(lib_parse);
 192 EXPORT_SYMBOL(lib_create_reply_msg);
 193 EXPORT_SYMBOL(lib_init);
 194 EXPORT_SYMBOL(lib_fini);
 195
 196 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
 197 MODULE_DESCRIPTION("Portals v3.1");
 198 MODULE_LICENSE("GPL");
 199 module_init(init_kportals_module);
 200 module_exit(exit_kportals_module);