linux-kernel - [PATCH] [5/11] SYSCTL: Add call_usermodehelper

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Message-Id: <20091221012026.A5B9EB158A@basil.firstfloor.org>
Date:	Mon, 21 Dec 2009 02:20:26 +0100 (CET)
From:	Andi Kleen <andi@...stfloor.org>
To:	linux-kernel@...r.kernel.org, paulmck@...ux.vnet.ibm.com,
	ebiederm@...ssion.com
Subject: [PATCH] [5/11] SYSCTL: Add call_usermodehelper_cleanup()


This is the same as call_usermodehelper(), but with an cleanup callback.
Needed for some of the followon proc_rcu_string() users.

This avoids open coding this.

Signed-off-by: Andi Kleen <ak@...ux.intel.com>

---
 include/linux/kmod.h |   11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

Index: linux-2.6.33-rc1-ak/include/linux/kmod.h
===================================================================
--- linux-2.6.33-rc1-ak.orig/include/linux/kmod.h
+++ linux-2.6.33-rc1-ak/include/linux/kmod.h
@@ -72,7 +72,8 @@ int call_usermodehelper_exec(struct subp
 void call_usermodehelper_freeinfo(struct subprocess_info *info);
 
 static inline int
-call_usermodehelper(char *path, char **argv, char **envp, enum umh_wait wait)
+call_usermodehelper_cleanup(char *path, char **argv, char **envp, enum umh_wait wait,
+			    void (*cleanup)(char **, char **))
 {
 	struct subprocess_info *info;
 	gfp_t gfp_mask = (wait == UMH_NO_WAIT) ? GFP_ATOMIC : GFP_KERNEL;
@@ -80,10 +81,18 @@ call_usermodehelper(char *path, char **a
 	info = call_usermodehelper_setup(path, argv, envp, gfp_mask);
 	if (info == NULL)
 		return -ENOMEM;
+	if (cleanup)
+		call_usermodehelper_setcleanup(info, cleanup);
 	return call_usermodehelper_exec(info, wait);
 }
 
 static inline int
+call_usermodehelper(char *path, char **argv, char **envp, enum umh_wait wait)
+{
+	return call_usermodehelper_cleanup(path, argv, envp, wait, NULL);
+}
+
+static inline int
 call_usermodehelper_keys(char *path, char **argv, char **envp,
 			 struct key *session_keyring, enum umh_wait wait)
 {
--
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