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Linux/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, path.pathrec.dlid ? "yes" : "no");
214 
215         if (path.pathrec.dlid) {
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                            be16_to_cpu(path.pathrec.dlid),
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 = netdev_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 = netdev_priv(dev);
283 
284         debugfs_remove(priv->mcg_dentry);
285         debugfs_remove(priv->path_dentry);
286 }
287 
288 int ipoib_register_debugfs(void)
289 {
290         ipoib_root = debugfs_create_dir("ipoib", NULL);
291         return ipoib_root ? 0 : -ENOMEM;
292 }
293 
294 void ipoib_unregister_debugfs(void)
295 {
296         debugfs_remove(ipoib_root);
297 }
298 

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