forked from Minki/linux
316bcda81d
When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Parvi Kaustubhi <pkaustub@cisco.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
144 lines
4.0 KiB
C
144 lines
4.0 KiB
C
/*
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* Copyright (c) 2013, Cisco Systems, Inc. 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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* 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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*/
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#include <linux/debugfs.h>
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#include <linux/module.h>
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#include "usnic.h"
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#include "usnic_log.h"
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#include "usnic_debugfs.h"
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#include "usnic_ib_qp_grp.h"
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#include "usnic_transport.h"
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static struct dentry *debugfs_root;
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static struct dentry *flows_dentry;
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static ssize_t usnic_debugfs_buildinfo_read(struct file *f, char __user *data,
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size_t count, loff_t *ppos)
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{
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char buf[500];
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int res;
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if (*ppos > 0)
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return 0;
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res = scnprintf(buf, sizeof(buf),
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"version: %s\n"
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"build date: %s\n",
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DRV_VERSION, DRV_RELDATE);
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return simple_read_from_buffer(data, count, ppos, buf, res);
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}
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static const struct file_operations usnic_debugfs_buildinfo_ops = {
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.owner = THIS_MODULE,
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.open = simple_open,
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.read = usnic_debugfs_buildinfo_read
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};
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static ssize_t flowinfo_read(struct file *f, char __user *data,
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size_t count, loff_t *ppos)
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{
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struct usnic_ib_qp_grp_flow *qp_flow;
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int n;
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int left;
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char *ptr;
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char buf[512];
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qp_flow = f->private_data;
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ptr = buf;
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left = count;
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if (*ppos > 0)
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return 0;
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spin_lock(&qp_flow->qp_grp->lock);
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n = scnprintf(ptr, left,
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"QP Grp ID: %d Transport: %s ",
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qp_flow->qp_grp->grp_id,
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usnic_transport_to_str(qp_flow->trans_type));
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UPDATE_PTR_LEFT(n, ptr, left);
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if (qp_flow->trans_type == USNIC_TRANSPORT_ROCE_CUSTOM) {
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n = scnprintf(ptr, left, "Port_Num:%hu\n",
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qp_flow->usnic_roce.port_num);
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UPDATE_PTR_LEFT(n, ptr, left);
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} else if (qp_flow->trans_type == USNIC_TRANSPORT_IPV4_UDP) {
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n = usnic_transport_sock_to_str(ptr, left,
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qp_flow->udp.sock);
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UPDATE_PTR_LEFT(n, ptr, left);
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n = scnprintf(ptr, left, "\n");
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UPDATE_PTR_LEFT(n, ptr, left);
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}
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spin_unlock(&qp_flow->qp_grp->lock);
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return simple_read_from_buffer(data, count, ppos, buf, ptr - buf);
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}
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static const struct file_operations flowinfo_ops = {
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.owner = THIS_MODULE,
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.open = simple_open,
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.read = flowinfo_read,
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};
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void usnic_debugfs_init(void)
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{
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debugfs_root = debugfs_create_dir(DRV_NAME, NULL);
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flows_dentry = debugfs_create_dir("flows", debugfs_root);
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debugfs_create_file("build-info", S_IRUGO, debugfs_root,
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NULL, &usnic_debugfs_buildinfo_ops);
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}
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void usnic_debugfs_exit(void)
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{
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debugfs_remove_recursive(debugfs_root);
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debugfs_root = NULL;
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}
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void usnic_debugfs_flow_add(struct usnic_ib_qp_grp_flow *qp_flow)
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{
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scnprintf(qp_flow->dentry_name, sizeof(qp_flow->dentry_name),
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"%u", qp_flow->flow->flow_id);
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qp_flow->dbgfs_dentry = debugfs_create_file(qp_flow->dentry_name,
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S_IRUGO,
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flows_dentry,
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qp_flow,
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&flowinfo_ops);
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}
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void usnic_debugfs_flow_remove(struct usnic_ib_qp_grp_flow *qp_flow)
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{
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debugfs_remove(qp_flow->dbgfs_dentry);
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}
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