cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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usnic_debugfs.c (4050B)

      1/*
      2 * Copyright (c) 2013, Cisco Systems, Inc. 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 * 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
     34#include <linux/debugfs.h>
     35
     36#include "usnic.h"
     37#include "usnic_log.h"
     38#include "usnic_debugfs.h"
     39#include "usnic_ib_qp_grp.h"
     40#include "usnic_transport.h"
     41
     42static struct dentry *debugfs_root;
     43static struct dentry *flows_dentry;
     44
     45static ssize_t usnic_debugfs_buildinfo_read(struct file *f, char __user *data,
     46						size_t count, loff_t *ppos)
     47{
     48	char buf[500];
     49	int res;
     50
     51	if (*ppos > 0)
     52		return 0;
     53
     54	res = scnprintf(buf, sizeof(buf),
     55			"version:       %s\n"
     56			"build date:    %s\n",
     57			DRV_VERSION, DRV_RELDATE);
     58
     59	return simple_read_from_buffer(data, count, ppos, buf, res);
     60}
     61
     62static const struct file_operations usnic_debugfs_buildinfo_ops = {
     63	.owner = THIS_MODULE,
     64	.open = simple_open,
     65	.read = usnic_debugfs_buildinfo_read
     66};
     67
     68static ssize_t flowinfo_read(struct file *f, char __user *data,
     69				size_t count, loff_t *ppos)
     70{
     71	struct usnic_ib_qp_grp_flow *qp_flow;
     72	int n;
     73	int left;
     74	char *ptr;
     75	char buf[512];
     76
     77	qp_flow = f->private_data;
     78	ptr = buf;
     79	left = count;
     80
     81	if (*ppos > 0)
     82		return 0;
     83
     84	spin_lock(&qp_flow->qp_grp->lock);
     85	n = scnprintf(ptr, left,
     86			"QP Grp ID: %d Transport: %s ",
     87			qp_flow->qp_grp->grp_id,
     88			usnic_transport_to_str(qp_flow->trans_type));
     89	UPDATE_PTR_LEFT(n, ptr, left);
     90	if (qp_flow->trans_type == USNIC_TRANSPORT_ROCE_CUSTOM) {
     91		n = scnprintf(ptr, left, "Port_Num:%hu\n",
     92					qp_flow->usnic_roce.port_num);
     93		UPDATE_PTR_LEFT(n, ptr, left);
     94	} else if (qp_flow->trans_type == USNIC_TRANSPORT_IPV4_UDP) {
     95		n = usnic_transport_sock_to_str(ptr, left,
     96				qp_flow->udp.sock);
     97		UPDATE_PTR_LEFT(n, ptr, left);
     98		n = scnprintf(ptr, left, "\n");
     99		UPDATE_PTR_LEFT(n, ptr, left);
    100	}
    101	spin_unlock(&qp_flow->qp_grp->lock);
    102
    103	return simple_read_from_buffer(data, count, ppos, buf, ptr - buf);
    104}
    105
    106static const struct file_operations flowinfo_ops = {
    107	.owner = THIS_MODULE,
    108	.open = simple_open,
    109	.read = flowinfo_read,
    110};
    111
    112void usnic_debugfs_init(void)
    113{
    114	debugfs_root = debugfs_create_dir(DRV_NAME, NULL);
    115
    116	flows_dentry = debugfs_create_dir("flows", debugfs_root);
    117
    118	debugfs_create_file("build-info", S_IRUGO, debugfs_root,
    119				NULL, &usnic_debugfs_buildinfo_ops);
    120}
    121
    122void usnic_debugfs_exit(void)
    123{
    124	debugfs_remove_recursive(debugfs_root);
    125	debugfs_root = NULL;
    126}
    127
    128void usnic_debugfs_flow_add(struct usnic_ib_qp_grp_flow *qp_flow)
    129{
    130	scnprintf(qp_flow->dentry_name, sizeof(qp_flow->dentry_name),
    131			"%u", qp_flow->flow->flow_id);
    132	qp_flow->dbgfs_dentry = debugfs_create_file(qp_flow->dentry_name,
    133							S_IRUGO,
    134							flows_dentry,
    135							qp_flow,
    136							&flowinfo_ops);
    137}
    138
    139void usnic_debugfs_flow_remove(struct usnic_ib_qp_grp_flow *qp_flow)
    140{
    141	debugfs_remove(qp_flow->dbgfs_dentry);
    142}