forked from Minki/linux
e42fa2092c
Fix checkpatch warning:
WARNING: debugfs_remove(NULL) is safe this check is probably not required
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
298 lines
6.6 KiB
C
298 lines
6.6 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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#include <linux/err.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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struct file_operations;
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#include <linux/debugfs.h>
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#include <linux/export.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 const 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->i_private;
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return 0;
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}
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static const 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_rate_to_mbps(path.pathrec.rate);
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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: %8d.%d Gb/sec\n",
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be16_to_cpu(path.pathrec.dlid),
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path.pathrec.sl,
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rate / 1000, rate % 1000);
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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 const 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->i_private;
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return 0;
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}
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static const 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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debugfs_remove(priv->mcg_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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