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1732b0ef3b
Add ibX_path files to debugfs that contain information about the IPoIB path cache. IPoIB ARP only gives GIDs, which the IPoIB driver must resolve to real IB paths through the ib_sa module. For debugging, when the ARP table looks OK but traffic isn't flowing, it's useful to be able to see if the resolution from GID to path worked. Also clean up the formatting of the existing _mcg debugfs files. Signed-off-by: Roland Dreier <rolandd@cisco.com>
301 lines
6.7 KiB
C
301 lines
6.7 KiB
C
/*
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* Copyright (c) 2004 Topspin Communications. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* $Id: ipoib_fs.c 1389 2004-12-27 22:56:47Z roland $
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*/
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#include <linux/err.h>
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#include <linux/seq_file.h>
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struct file_operations;
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#include <linux/debugfs.h>
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#include "ipoib.h"
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static struct dentry *ipoib_root;
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static void format_gid(union ib_gid *gid, char *buf)
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{
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int i, n;
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for (n = 0, i = 0; i < 8; ++i) {
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n += sprintf(buf + n, "%x",
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be16_to_cpu(((__be16 *) gid->raw)[i]));
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if (i < 7)
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buf[n++] = ':';
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}
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}
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static void *ipoib_mcg_seq_start(struct seq_file *file, loff_t *pos)
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{
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struct ipoib_mcast_iter *iter;
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loff_t n = *pos;
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iter = ipoib_mcast_iter_init(file->private);
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if (!iter)
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return NULL;
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while (n--) {
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if (ipoib_mcast_iter_next(iter)) {
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kfree(iter);
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return NULL;
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}
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}
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return iter;
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}
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static void *ipoib_mcg_seq_next(struct seq_file *file, void *iter_ptr,
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loff_t *pos)
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{
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struct ipoib_mcast_iter *iter = iter_ptr;
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(*pos)++;
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if (ipoib_mcast_iter_next(iter)) {
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kfree(iter);
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return NULL;
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}
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return iter;
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}
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static void ipoib_mcg_seq_stop(struct seq_file *file, void *iter_ptr)
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{
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/* nothing for now */
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}
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static int ipoib_mcg_seq_show(struct seq_file *file, void *iter_ptr)
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{
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struct ipoib_mcast_iter *iter = iter_ptr;
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char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
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union ib_gid mgid;
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unsigned long created;
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unsigned int queuelen, complete, send_only;
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if (!iter)
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return 0;
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ipoib_mcast_iter_read(iter, &mgid, &created, &queuelen,
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&complete, &send_only);
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format_gid(&mgid, gid_buf);
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seq_printf(file,
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"GID: %s\n"
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" created: %10ld\n"
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" queuelen: %9d\n"
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" complete: %9s\n"
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" send_only: %8s\n"
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"\n",
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gid_buf, created, queuelen,
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complete ? "yes" : "no",
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send_only ? "yes" : "no");
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return 0;
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}
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static struct seq_operations ipoib_mcg_seq_ops = {
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.start = ipoib_mcg_seq_start,
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.next = ipoib_mcg_seq_next,
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.stop = ipoib_mcg_seq_stop,
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.show = ipoib_mcg_seq_show,
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};
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static int ipoib_mcg_open(struct inode *inode, struct file *file)
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{
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struct seq_file *seq;
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int ret;
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ret = seq_open(file, &ipoib_mcg_seq_ops);
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if (ret)
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return ret;
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seq = file->private_data;
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seq->private = inode->u.generic_ip;
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return 0;
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}
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static struct file_operations ipoib_mcg_fops = {
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.owner = THIS_MODULE,
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.open = ipoib_mcg_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release
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};
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static void *ipoib_path_seq_start(struct seq_file *file, loff_t *pos)
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{
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struct ipoib_path_iter *iter;
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loff_t n = *pos;
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iter = ipoib_path_iter_init(file->private);
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if (!iter)
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return NULL;
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while (n--) {
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if (ipoib_path_iter_next(iter)) {
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kfree(iter);
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return NULL;
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}
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}
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return iter;
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}
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static void *ipoib_path_seq_next(struct seq_file *file, void *iter_ptr,
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loff_t *pos)
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{
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struct ipoib_path_iter *iter = iter_ptr;
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(*pos)++;
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if (ipoib_path_iter_next(iter)) {
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kfree(iter);
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return NULL;
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}
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return iter;
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}
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static void ipoib_path_seq_stop(struct seq_file *file, void *iter_ptr)
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{
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/* nothing for now */
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}
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static int ipoib_path_seq_show(struct seq_file *file, void *iter_ptr)
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{
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struct ipoib_path_iter *iter = iter_ptr;
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char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
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struct ipoib_path path;
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int rate;
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if (!iter)
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return 0;
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ipoib_path_iter_read(iter, &path);
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format_gid(&path.pathrec.dgid, gid_buf);
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seq_printf(file,
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"GID: %s\n"
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" complete: %6s\n",
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gid_buf, path.pathrec.dlid ? "yes" : "no");
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if (path.pathrec.dlid) {
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rate = ib_sa_rate_enum_to_int(path.pathrec.rate) * 25;
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seq_printf(file,
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" DLID: 0x%04x\n"
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" SL: %12d\n"
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" rate: %*d%s Gb/sec\n",
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be16_to_cpu(path.pathrec.dlid),
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path.pathrec.sl,
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10 - ((rate % 10) ? 2 : 0),
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rate / 10, rate % 10 ? ".5" : "");
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}
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seq_putc(file, '\n');
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return 0;
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}
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static struct seq_operations ipoib_path_seq_ops = {
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.start = ipoib_path_seq_start,
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.next = ipoib_path_seq_next,
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.stop = ipoib_path_seq_stop,
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.show = ipoib_path_seq_show,
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};
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static int ipoib_path_open(struct inode *inode, struct file *file)
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{
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struct seq_file *seq;
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int ret;
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ret = seq_open(file, &ipoib_path_seq_ops);
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if (ret)
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return ret;
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seq = file->private_data;
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seq->private = inode->u.generic_ip;
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return 0;
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}
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static struct file_operations ipoib_path_fops = {
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.owner = THIS_MODULE,
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.open = ipoib_path_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release
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};
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void ipoib_create_debug_files(struct net_device *dev)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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char name[IFNAMSIZ + sizeof "_path"];
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snprintf(name, sizeof name, "%s_mcg", dev->name);
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priv->mcg_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
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ipoib_root, dev, &ipoib_mcg_fops);
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if (!priv->mcg_dentry)
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ipoib_warn(priv, "failed to create mcg debug file\n");
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snprintf(name, sizeof name, "%s_path", dev->name);
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priv->path_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
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ipoib_root, dev, &ipoib_path_fops);
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if (!priv->path_dentry)
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ipoib_warn(priv, "failed to create path debug file\n");
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}
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void ipoib_delete_debug_files(struct net_device *dev)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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if (priv->mcg_dentry)
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debugfs_remove(priv->mcg_dentry);
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if (priv->path_dentry)
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debugfs_remove(priv->path_dentry);
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}
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int ipoib_register_debugfs(void)
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{
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ipoib_root = debugfs_create_dir("ipoib", NULL);
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return ipoib_root ? 0 : -ENOMEM;
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}
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void ipoib_unregister_debugfs(void)
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{
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debugfs_remove(ipoib_root);
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}
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