drivers/infiniband/ulp/ipoib/ipoib_fs.c

   1 /*
   2  * Copyright (c) 2004 Topspin Communications.  All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #include <linux/err.h>
  34 #include <linux/seq_file.h>
  35 #include <linux/slab.h>
  36
  37 struct file_operations;
  38
  39 #include <linux/debugfs.h>
  40 #include <linux/export.h>
  41
  42 #include "ipoib.h"
  43
  44 static struct dentry *ipoib_root;
  45
  46 static void format_gid(union ib_gid *gid, char *buf)
  47 {
  48         int i, n;
  49
  50         for (n = 0, i = 0; i < 8; ++i) {
  51                 n += sprintf(buf + n, "%x",
  52                              be16_to_cpu(((__be16 *) gid->raw)[i]));
  53                 if (i < 7)
  54                         buf[n++] = ':';
  55         }
  56 }
  57
  58 static void *ipoib_mcg_seq_start(struct seq_file *file, loff_t *pos)
  59 {
  60         struct ipoib_mcast_iter *iter;
  61         loff_t n = *pos;
  62
  63         iter = ipoib_mcast_iter_init(file->private);
  64         if (!iter)
  65                 return NULL;
  66
  67         while (n--) {
  68                 if (ipoib_mcast_iter_next(iter)) {
  69                         kfree(iter);
  70                         return NULL;
  71                 }
  72         }
  73
  74         return iter;
  75 }
  76
  77 static void *ipoib_mcg_seq_next(struct seq_file *file, void *iter_ptr,
  78                                    loff_t *pos)
  79 {
  80         struct ipoib_mcast_iter *iter = iter_ptr;
  81
  82         (*pos)++;
  83
  84         if (ipoib_mcast_iter_next(iter)) {
  85                 kfree(iter);
  86                 return NULL;
  87         }
  88
  89         return iter;
  90 }
  91
  92 static void ipoib_mcg_seq_stop(struct seq_file *file, void *iter_ptr)
  93 {
  94         /* nothing for now */
  95 }
  96
  97 static int ipoib_mcg_seq_show(struct seq_file *file, void *iter_ptr)
  98 {
  99         struct ipoib_mcast_iter *iter = iter_ptr;
 100         char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
 101         union ib_gid mgid;
 102         unsigned long created;
 103         unsigned int queuelen, complete, send_only;
 104
 105         if (!iter)
 106                 return 0;
 107
 108         ipoib_mcast_iter_read(iter, &mgid, &created, &queuelen,
 109                               &complete, &send_only);
 110
 111         format_gid(&mgid, gid_buf);
 112
 113         seq_printf(file,
 114                    "GID: %s\n"
 115                    "  created: %10ld\n"
 116                    "  queuelen: %9d\n"
 117                    "  complete: %9s\n"
 118                    "  send_only: %8s\n"
 119                    "\n",
 120                    gid_buf, created, queuelen,
 121                    complete ? "yes" : "no",
 122                    send_only ? "yes" : "no");
 123
 124         return 0;
 125 }
 126
 127 static const struct seq_operations ipoib_mcg_seq_ops = {
 128         .start = ipoib_mcg_seq_start,
 129         .next  = ipoib_mcg_seq_next,
 130         .stop  = ipoib_mcg_seq_stop,
 131         .show  = ipoib_mcg_seq_show,
 132 };
 133
 134 static int ipoib_mcg_open(struct inode *inode, struct file *file)
 135 {
 136         struct seq_file *seq;
 137         int ret;
 138
 139         ret = seq_open(file, &ipoib_mcg_seq_ops);
 140         if (ret)
 141                 return ret;
 142
 143         seq = file->private_data;
 144         seq->private = inode->i_private;
 145
 146         return 0;
 147 }
 148
 149 static const struct file_operations ipoib_mcg_fops = {
 150         .owner   = THIS_MODULE,
 151         .open    = ipoib_mcg_open,
 152         .read    = seq_read,
 153         .llseek  = seq_lseek,
 154         .release = seq_release
 155 };
 156
 157 static void *ipoib_path_seq_start(struct seq_file *file, loff_t *pos)
 158 {
 159         struct ipoib_path_iter *iter;
 160         loff_t n = *pos;
 161
 162         iter = ipoib_path_iter_init(file->private);
 163         if (!iter)
 164                 return NULL;
 165
 166         while (n--) {
 167                 if (ipoib_path_iter_next(iter)) {
 168                         kfree(iter);
 169                         return NULL;
 170                 }
 171         }
 172
 173         return iter;
 174 }
 175
 176 static void *ipoib_path_seq_next(struct seq_file *file, void *iter_ptr,
 177                                    loff_t *pos)
 178 {
 179         struct ipoib_path_iter *iter = iter_ptr;
 180
 181         (*pos)++;
 182
 183         if (ipoib_path_iter_next(iter)) {
 184                 kfree(iter);
 185                 return NULL;
 186         }
 187
 188         return iter;
 189 }
 190
 191 static void ipoib_path_seq_stop(struct seq_file *file, void *iter_ptr)
 192 {
 193         /* nothing for now */
 194 }
 195
 196 static int ipoib_path_seq_show(struct seq_file *file, void *iter_ptr)
 197 {
 198         struct ipoib_path_iter *iter = iter_ptr;
 199         char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
 200         struct ipoib_path path;
 201         int rate;
 202
 203         if (!iter)
 204                 return 0;
 205
 206         ipoib_path_iter_read(iter, &path);
 207
 208         format_gid(&path.pathrec.dgid, gid_buf);
 209
 210         seq_printf(file,
 211                    "GID: %s\n"
 212                    "  complete: %6s\n",
 213                    gid_buf, sa_path_get_dlid(&path.pathrec) ? "yes" : "no");
 214
 215         if (sa_path_get_dlid(&path.pathrec)) {
 216                 rate = ib_rate_to_mbps(path.pathrec.rate);
 217
 218                 seq_printf(file,
 219                            "  DLID:     0x%04x\n"
 220                            "  SL: %12d\n"
 221                            "  rate: %8d.%d Gb/sec\n",
 222                            be32_to_cpu(sa_path_get_dlid(&path.pathrec)),
 223                            path.pathrec.sl,
 224                            rate / 1000, rate % 1000);
 225         }
 226
 227         seq_putc(file, '\n');
 228
 229         return 0;
 230 }
 231
 232 static const struct seq_operations ipoib_path_seq_ops = {
 233         .start = ipoib_path_seq_start,
 234         .next  = ipoib_path_seq_next,
 235         .stop  = ipoib_path_seq_stop,
 236         .show  = ipoib_path_seq_show,
 237 };
 238
 239 static int ipoib_path_open(struct inode *inode, struct file *file)
 240 {
 241         struct seq_file *seq;
 242         int ret;
 243
 244         ret = seq_open(file, &ipoib_path_seq_ops);
 245         if (ret)
 246                 return ret;
 247
 248         seq = file->private_data;
 249         seq->private = inode->i_private;
 250
 251         return 0;
 252 }
 253
 254 static const struct file_operations ipoib_path_fops = {
 255         .owner   = THIS_MODULE,
 256         .open    = ipoib_path_open,
 257         .read    = seq_read,
 258         .llseek  = seq_lseek,
 259         .release = seq_release
 260 };
 261
 262 void ipoib_create_debug_files(struct net_device *dev)
 263 {
 264         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 265         char name[IFNAMSIZ + sizeof "_path"];
 266
 267         snprintf(name, sizeof name, "%s_mcg", dev->name);
 268         priv->mcg_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
 269                                                ipoib_root, dev, &ipoib_mcg_fops);
 270         if (!priv->mcg_dentry)
 271                 ipoib_warn(priv, "failed to create mcg debug file\n");
 272
 273         snprintf(name, sizeof name, "%s_path", dev->name);
 274         priv->path_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
 275                                                 ipoib_root, dev, &ipoib_path_fops);
 276         if (!priv->path_dentry)
 277                 ipoib_warn(priv, "failed to create path debug file\n");
 278 }
 279
 280 void ipoib_delete_debug_files(struct net_device *dev)
 281 {
 282         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 283
 284         debugfs_remove(priv->mcg_dentry);
 285         debugfs_remove(priv->path_dentry);
 286         priv->mcg_dentry = priv->path_dentry = NULL;
 287 }
 288
 289 int ipoib_register_debugfs(void)
 290 {
 291         ipoib_root = debugfs_create_dir("ipoib", NULL);
 292         return ipoib_root ? 0 : -ENOMEM;
 293 }
 294
 295 void ipoib_unregister_debugfs(void)
 296 {
 297         debugfs_remove(ipoib_root);
 298 }