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From: Leo Yan <leo.yan@linaro.org>
To: "David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	Mathieu Poirier <mathieu.poirier@linaro.org>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Mike Leach <mike.leach@linaro.org>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jan Harkes <jaharkes@cs.cmu.edu>,
	coda@cs.cmu.edu, Paul Moore <paul@paul-moore.com>,
	Eric Paris <eparis@redhat.com>,
	Balbir Singh <bsingharora@gmail.com>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org,
	codalist@coda.cs.cmu.edu, linux-audit@redhat.com
Cc: Leo Yan <leo.yan@linaro.org>
Subject: [PATCH v1 1/7] pid: Introduce helper task_is_in_root_ns()
Date: Sun,  5 Dec 2021 22:50:59 +0800	[thread overview]
Message-ID: <20211205145105.57824-2-leo.yan@linaro.org> (raw)
In-Reply-To: <20211205145105.57824-1-leo.yan@linaro.org>

Currently the kernel uses open code in multiple places to check if a
task is in the root PID namespace with the kind of format:

  if (task_active_pid_ns(current) == &init_pid_ns)
      do_something();

This patch creates a new helper function, task_is_in_root_ns(), it
returns true if a passed task is in the root PID namespace, otherwise
returns false.  So it will be used to replace open codes.

Suggested-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Leo Yan <leo.yan@linaro.org>
---
 include/linux/pid_namespace.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h
index 7c7e627503d2..bf82b373f022 100644
--- a/include/linux/pid_namespace.h
+++ b/include/linux/pid_namespace.h
@@ -86,4 +86,9 @@ extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk);
 void pidhash_init(void);
 void pid_idr_init(void);
 
+static inline bool task_is_in_root_ns(struct task_struct *tsk)
+{
+	return task_active_pid_ns(tsk) == &init_pid_ns;
+}
+
 #endif /* _LINUX_PID_NS_H */
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: Leo Yan <leo.yan@linaro.org>
To: "David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	Mathieu Poirier <mathieu.poirier@linaro.org>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Mike Leach <mike.leach@linaro.org>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jan Harkes <jaharkes@cs.cmu.edu>,
	coda@cs.cmu.edu, Paul Moore <paul@paul-moore.com>,
	Eric Paris <eparis@redhat.com>,
	Balbir Singh <bsingharora@gmail.com>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org,
	codalist@coda.cs.cmu.edu, linux-audit@redhat.com
Cc: Leo Yan <leo.yan@linaro.org>
Subject: [PATCH v1 1/7] pid: Introduce helper task_is_in_root_ns()
Date: Sun,  5 Dec 2021 22:50:59 +0800	[thread overview]
Message-ID: <20211205145105.57824-2-leo.yan@linaro.org> (raw)
In-Reply-To: <20211205145105.57824-1-leo.yan@linaro.org>

Currently the kernel uses open code in multiple places to check if a
task is in the root PID namespace with the kind of format:

  if (task_active_pid_ns(current) == &init_pid_ns)
      do_something();

This patch creates a new helper function, task_is_in_root_ns(), it
returns true if a passed task is in the root PID namespace, otherwise
returns false.  So it will be used to replace open codes.

Suggested-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Leo Yan <leo.yan@linaro.org>
---
 include/linux/pid_namespace.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h
index 7c7e627503d2..bf82b373f022 100644
--- a/include/linux/pid_namespace.h
+++ b/include/linux/pid_namespace.h
@@ -86,4 +86,9 @@ extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk);
 void pidhash_init(void);
 void pid_idr_init(void);
 
+static inline bool task_is_in_root_ns(struct task_struct *tsk)
+{
+	return task_active_pid_ns(tsk) == &init_pid_ns;
+}
+
 #endif /* _LINUX_PID_NS_H */
-- 
2.25.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
From: Leo Yan <leo.yan@linaro.org>
To: "David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	 Mathieu Poirier <mathieu.poirier@linaro.org>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Mike Leach <mike.leach@linaro.org>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jan Harkes <jaharkes@cs.cmu.edu>,
	coda@cs.cmu.edu, Paul Moore <paul@paul-moore.com>,
	Eric Paris <eparis@redhat.com>,
	Balbir Singh <bsingharora@gmail.com>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org,
	codalist@telemann.coda.cs.cmu.edu, linux-audit@redhat.com
Cc: Leo Yan <leo.yan@linaro.org>
Subject: [PATCH v1 1/7] pid: Introduce helper task_is_in_root_ns()
Date: Sun,  5 Dec 2021 22:50:59 +0800	[thread overview]
Message-ID: <20211205145105.57824-2-leo.yan@linaro.org> (raw)
In-Reply-To: <20211205145105.57824-1-leo.yan@linaro.org>

Currently the kernel uses open code in multiple places to check if a
task is in the root PID namespace with the kind of format:

  if (task_active_pid_ns(current) == &init_pid_ns)
      do_something();

This patch creates a new helper function, task_is_in_root_ns(), it
returns true if a passed task is in the root PID namespace, otherwise
returns false.  So it will be used to replace open codes.

Suggested-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Leo Yan <leo.yan@linaro.org>
---
 include/linux/pid_namespace.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h
index 7c7e627503d2..bf82b373f022 100644
--- a/include/linux/pid_namespace.h
+++ b/include/linux/pid_namespace.h
@@ -86,4 +86,9 @@ extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk);
 void pidhash_init(void);
 void pid_idr_init(void);
 
+static inline bool task_is_in_root_ns(struct task_struct *tsk)
+{
+	return task_active_pid_ns(tsk) == &init_pid_ns;
+}
+
 #endif /* _LINUX_PID_NS_H */
-- 
2.25.1

--
Linux-audit mailing list
Linux-audit@redhat.com
https://listman.redhat.com/mailman/listinfo/linux-audit


  reply	other threads:[~2021-12-05 14:51 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-05 14:50 [PATCH v1 0/7] pid: Introduce helper task_is_in_root_ns() Leo Yan
2021-12-05 14:50 ` Leo Yan
2021-12-05 14:50 ` Leo Yan
2021-12-05 14:50 ` Leo Yan [this message]
2021-12-05 14:50   ` [PATCH v1 1/7] " Leo Yan
2021-12-05 14:50   ` Leo Yan
2021-12-06  6:49   ` Leon Romanovsky
2021-12-06  6:49     ` Leon Romanovsky
2021-12-06  6:49     ` Leon Romanovsky
2021-12-06  7:03     ` Leo Yan
2021-12-06  7:03       ` Leo Yan
2021-12-06  7:03       ` Leo Yan
2021-12-06  7:13       ` Leon Romanovsky
2021-12-06  7:13         ` Leon Romanovsky
2021-12-06  7:13         ` Leon Romanovsky
2021-12-05 14:51 ` [PATCH v1 2/7] coresight: etm3x: Use task_is_in_root_ns() to check PID namespace Leo Yan
2021-12-05 14:51   ` Leo Yan
2021-12-05 14:51   ` Leo Yan
2021-12-05 14:51 ` [PATCH v1 3/7] coresight: etm4x: " Leo Yan
2021-12-05 14:51   ` Leo Yan
2021-12-05 14:51   ` Leo Yan
2021-12-05 14:51 ` [PATCH v1 4/7] connector/cn_proc: " Leo Yan
2021-12-05 14:51   ` Leo Yan
2021-12-05 14:51   ` Leo Yan
2021-12-05 14:51 ` [PATCH v1 5/7] coda: Use task_is_in_root_ns() Leo Yan
2021-12-05 14:51   ` Leo Yan
2021-12-05 14:51   ` Leo Yan
2021-12-05 14:51 ` [PATCH v1 6/7] audit: " Leo Yan
2021-12-05 14:51   ` Leo Yan
2021-12-05 14:51   ` Leo Yan
2021-12-05 14:51 ` [PATCH v1 7/7] taskstats: " Leo Yan
2021-12-05 14:51   ` Leo Yan
2021-12-05 14:51   ` Leo Yan

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