linux-kernel - [RFC][PATCH -mm 6/6] kprobes: Support kretprobe and jprobe per-probe disabling

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Message-ID: <496BF4C0.2070607@redhat.com>
Date:	Mon, 12 Jan 2009 20:56:16 -0500
From:	Masami Hiramatsu <mhiramat@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Jim Keniston <jkenisto@...ibm.com>,
	David Miller <davem@...emloft.net>,
	Maneesh Soni <maneesh@...ux.vnet.ibm.com>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	systemtap-ml <systemtap@...rces.redhat.com>
Subject: [RFC][PATCH -mm 6/6] kprobes: Support kretprobe and jprobe per-probe
 disabling

Add disable/enable_kretprobe() and disable/enable_jprobe().

Signed-off-by: Masami Hiramatsu <mhiramat@...hat.com>
---
 Documentation/kprobes.txt |   16 ++++++++++------
 include/linux/kprobes.h   |   17 +++++++++++++++++
 2 files changed, 27 insertions(+), 6 deletions(-)

Index: 2.6.28-mm1/include/linux/kprobes.h
===================================================================
--- 2.6.28-mm1.orig/include/linux/kprobes.h
+++ 2.6.28-mm1/include/linux/kprobes.h
@@ -350,4 +350,21 @@ static inline int enable_kprobe(struct k
 	return -ENOSYS;
 }
 #endif				/* CONFIG_KPROBES */
+static inline int disable_kretprobe(struct kretprobe *rp)
+{
+	return disable_kprobe(&rp->kp);
+}
+static inline int enable_kretprobe(struct kretprobe *rp)
+{
+	return enable_kprobe(&rp->kp);
+}
+static inline int disable_jprobe(struct jprobe *jp)
+{
+	return disable_kprobe(&jp->kp);
+}
+static inline int enable_jprobe(struct jprobe *jp)
+{
+	return enable_kprobe(&jp->kp);
+}
+
 #endif				/* _LINUX_KPROBES_H */
Index: 2.6.28-mm1/Documentation/kprobes.txt
===================================================================
--- 2.6.28-mm1.orig/Documentation/kprobes.txt
+++ 2.6.28-mm1/Documentation/kprobes.txt
@@ -365,21 +365,25 @@ probes) in the specified array, they cle
 incorrect probes. However, other probes in the array are
 unregistered correctly.

-4.7 disable_kprobe
+4.7 disable_*probe

 #include <linux/kprobes.h>
 int disable_kprobe(struct kprobe *kp);
+int disable_kretprobe(struct kretprobe *rp);
+int disable_jprobe(struct jprobe *jp);

-Temporarily disables the specified kprobe. You can enable it again by using
-enable_kprobe(). You must specify the kprobe which has been registered.
+Temporarily disables the specified *probe. You can enable it again by using
+enable_*probe(). You must specify the probe which has been registered.

-4.8 enable_kprobe
+4.8 enable_*probe

 #include <linux/kprobes.h>
 int enable_kprobe(struct kprobe *kp);
+int enable_kretprobe(struct kretprobe *rp);
+int enable_jprobe(struct jprobe *jp);

-Enables kprobe which has been disabled by disable_kprobe(). You must specify
-the kprobe which has been registered.
+Enables *probe which has been disabled by disable_*probe(). You must specify
+the probe which has been registered.

 5. Kprobes Features and Limitations

-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America) Inc.
Software Solutions Division

e-mail: mhiramat@...hat.com




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