From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/kernel/taskstats.c | 27 ++++++++-------------------
1 files changed, 8 insertions(+), 19 deletions(-)
diff --git a/kernel/kernel/taskstats.c b/kernel/kernel/taskstats.c
index 8239395..a2802b6 100644
--- a/kernel/kernel/taskstats.c
+++ b/kernel/kernel/taskstats.c
@@ -1,19 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* taskstats.c - Export per-task statistics to userland
*
* Copyright (C) Shailabh Nagar, IBM Corp. 2006
* (C) Balbir Singh, IBM Corp. 2006
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
*/
#include <linux/kernel.h>
@@ -44,17 +34,13 @@
static struct genl_family family;
-static const struct nla_policy taskstats_cmd_get_policy[TASKSTATS_CMD_ATTR_MAX+1] = {
+static const struct nla_policy taskstats_cmd_get_policy[] = {
[TASKSTATS_CMD_ATTR_PID] = { .type = NLA_U32 },
[TASKSTATS_CMD_ATTR_TGID] = { .type = NLA_U32 },
[TASKSTATS_CMD_ATTR_REGISTER_CPUMASK] = { .type = NLA_STRING },
[TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK] = { .type = NLA_STRING },};
-/*
- * We have to use TASKSTATS_CMD_ATTR_MAX here, it is the maxattr in the family.
- * Make sure they are always aligned.
- */
-static const struct nla_policy cgroupstats_cmd_get_policy[TASKSTATS_CMD_ATTR_MAX+1] = {
+static const struct nla_policy cgroupstats_cmd_get_policy[] = {
[CGROUPSTATS_CMD_ATTR_FD] = { .type = NLA_U32 },
};
@@ -375,7 +361,7 @@
? TASKSTATS_TYPE_AGGR_PID
: TASKSTATS_TYPE_AGGR_TGID;
- na = nla_nest_start(skb, aggr);
+ na = nla_nest_start_noflag(skb, aggr);
if (!na)
goto err;
@@ -657,21 +643,24 @@
static const struct genl_ops taskstats_ops[] = {
{
.cmd = TASKSTATS_CMD_GET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = taskstats_user_cmd,
.policy = taskstats_cmd_get_policy,
+ .maxattr = ARRAY_SIZE(taskstats_cmd_get_policy) - 1,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = CGROUPSTATS_CMD_GET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = cgroupstats_user_cmd,
.policy = cgroupstats_cmd_get_policy,
+ .maxattr = ARRAY_SIZE(cgroupstats_cmd_get_policy) - 1,
},
};
static struct genl_family family __ro_after_init = {
.name = TASKSTATS_GENL_NAME,
.version = TASKSTATS_GENL_VERSION,
- .maxattr = TASKSTATS_CMD_ATTR_MAX,
.module = THIS_MODULE,
.ops = taskstats_ops,
.n_ops = ARRAY_SIZE(taskstats_ops),
--
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