linux-kernel - [Patch 10/21] Create /proc/pid/core entry

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Message-ID: <20101214154104.1a7bc8ae@suzukikp>
Date:	Tue, 14 Dec 2010 15:41:04 +0530
From:	"Suzuki K. Poulose" <suzuki@...ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	"Suzuki K. Poulose" <suzuki@...ibm.com>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>,
	Christoph Hellwig <hch@....de>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Daisuke HATAYAMA <d.hatayama@...fujitsu.com>,
	Andi Kleen <andi@...stfloor.org>,
	Roland McGrath <roland@...hat.com>,
	Amerigo Wang <amwang@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [Patch 10/21] Create /proc/pid/core entry

Create the /proc/PID/core entry.

Signed-off-by: Suzuki K. Poulose <suzuki@...ibm.com>
Signed-off-by: Ananth N.Mavinakayanahalli <ananth@...ibm.com>
---
 fs/proc/Makefile   |    1 +
 fs/proc/base.c     |    1 +
 fs/proc/gencore.c  |   48 ++++++++++++++++++++++++++++++++++++++++++++++++
 fs/proc/internal.h |    1 +
 4 files changed, 51 insertions(+)

Index: linux-2.6.36-rc7/fs/proc/Makefile
===================================================================
--- linux-2.6.36-rc7.orig/fs/proc/Makefile
+++ linux-2.6.36-rc7/fs/proc/Makefile
@@ -19,6 +19,7 @@ proc-y	+= stat.o
 proc-y	+= uptime.o
 proc-y	+= version.o
 proc-y	+= softirqs.o
+proc-$(CONFIG_ELF_CORE)	+= gencore.o
 proc-$(CONFIG_PROC_SYSCTL)	+= proc_sysctl.o
 proc-$(CONFIG_NET)		+= proc_net.o
 proc-$(CONFIG_PROC_KCORE)	+= kcore.o
Index: linux-2.6.36-rc7/fs/proc/base.c
===================================================================
--- linux-2.6.36-rc7.orig/fs/proc/base.c
+++ linux-2.6.36-rc7/fs/proc/base.c
@@ -2735,6 +2735,7 @@ static const struct pid_entry tgid_base_
 #endif
 #ifdef CONFIG_ELF_CORE
 	REG("coredump_filter", S_IRUGO|S_IWUSR, proc_coredump_filter_operations),
+	REG("core", S_IRUSR, proc_gen_core_operations),
 #endif
 #ifdef CONFIG_TASK_IO_ACCOUNTING
 	INF("io",	S_IRUGO, proc_tgid_io_accounting),
Index: linux-2.6.36-rc7/fs/proc/gencore.c
===================================================================
--- /dev/null
+++ linux-2.6.36-rc7/fs/proc/gencore.c
@@ -0,0 +1,48 @@
+/*
+ * Application core dump
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) IBM Corporation, 2010
+ *
+ * Authors:
+ * 	 Ananth N.Mavinakayanahalli <ananth@...ibm.com>
+ *	 Suzuki K. Poulose <suzuki@...ibm.com>
+ */
+
+#include <linux/seq_file.h>
+#include "internal.h"
+
+static ssize_t read_gencore(struct file *file, char __user *buffer,
+		size_t buflen, loff_t *fpos)
+{
+	return 0;
+}
+
+static int release_gencore(struct inode *inode, struct file *file)
+{
+	return 0;
+}
+
+static int open_gencore(struct inode *inode, struct file *filp)
+{
+	return 0;
+}
+
+const struct file_operations proc_gen_core_operations = {
+	.open		= open_gencore,
+	.read		= read_gencore,
+	.release	= release_gencore,
+};
Index: linux-2.6.36-rc7/fs/proc/internal.h
===================================================================
--- linux-2.6.36-rc7.orig/fs/proc/internal.h
+++ linux-2.6.36-rc7/fs/proc/internal.h
@@ -60,6 +60,7 @@ extern const struct file_operations proc
 extern const struct file_operations proc_pagemap_operations;
 extern const struct file_operations proc_net_operations;
 extern const struct inode_operations proc_net_inode_operations;
+extern const struct file_operations proc_gen_core_operations;
 
 void proc_init_inodecache(void);
 
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