[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <1362407893-32505-2-git-send-email-anton@redhat.com>
Date: Mon, 4 Mar 2013 15:38:08 +0100
From: Anton Arapov <anton@...hat.com>
To: Anton Arapov <anton@...hat.com>, Oleg Nesterov <oleg@...hat.com>,
Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Cc: LKML <linux-kernel@...r.kernel.org>,
Josh Stone <jistone@...hat.com>,
Frank Eigler <fche@...hat.com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...e.hu>,
Ananth N Mavinakayanahalli <ananth@...ibm.com>
Subject: [RFC PATCH v4 1/6] uretprobes: preparation patch
1/6 and 6/6 patches are here to enclose return probes implementation as well
as prohibit uprobe_register() routine with no consumer set.
v3 changes: (the patch is introduced in v3)
- check whether at least one of the consumer's handlers were set
- a 'TODO' cap that will be removed once return probes be implemented
Signed-off-by: Anton Arapov <anton@...hat.com>
---
include/linux/uprobes.h | 1 +
kernel/events/uprobes.c | 8 ++++++++
2 files changed, 9 insertions(+)
diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h
index 02b83db..a28bdee 100644
--- a/include/linux/uprobes.h
+++ b/include/linux/uprobes.h
@@ -46,6 +46,7 @@ enum uprobe_filter_ctx {
struct uprobe_consumer {
int (*handler)(struct uprobe_consumer *self, struct pt_regs *regs);
+ int (*rp_handler)(struct uprobe_consumer *self, struct pt_regs *regs);
bool (*filter)(struct uprobe_consumer *self,
enum uprobe_filter_ctx ctx,
struct mm_struct *mm);
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index a567c8c..d904164 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -828,6 +828,14 @@ int uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *
struct uprobe *uprobe;
int ret;
+ /* Uprobe must have at least one set consumer */
+ if (!uc->handler && !uc->rp_handler)
+ return -EINVAL;
+
+ /* TODO: Implement return probes */
+ if (uc->rp_handler)
+ return -ENOSYS;
+
/* Racy, just to catch the obvious mistakes */
if (offset > i_size_read(inode))
return -EINVAL;
--
1.8.1.2
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists