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Message-ID: <20080211105003.GG7944@in.ibm.com>
Date: Mon, 11 Feb 2008 16:20:04 +0530
From: Ananth N Mavinakayanahalli <ananth@...ibm.com>
To: lkml <linux-kernel@...r.kernel.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Ingo Molnar <mingo@...e.hu>, Andi Kleen <ak@...e.de>,
Christoph Hellwig <hch@...radead.org>, sam@...nborg.org,
Arjan van de Ven <arjan@...ux.intel.com>, ankita@...ibm.com
Subject: [PATCH 5/8] Move lkdtm to tests/
From: Ananth N Mavinakayanahalli <ananth@...ibm.com>
Move the lkdtm infrastructure to tests/
Signed-off-by: Ananth N Mavinakayanahalli <ananth@...ibm.com>
Acked-by: Ankita Garg <ankita@...ibm.com>
---
drivers/misc/lkdtm.c | 345 --------------------------------------------------
drivers/misc/Makefile | 1
lib/Kconfig.debug | 15 --
tests/Kconfig | 15 ++
tests/Makefile | 1
tests/lkdtm.c | 345 ++++++++++++++++++++++++++++++++++++++++++++++++++
6 files changed, 361 insertions(+), 361 deletions(-)
Index: linux-2.6.25-rc1/drivers/misc/Makefile
===================================================================
--- linux-2.6.25-rc1.orig/drivers/misc/Makefile
+++ linux-2.6.25-rc1/drivers/misc/Makefile
@@ -11,7 +11,6 @@ obj-$(CONFIG_ASUS_LAPTOP) += asus-la
obj-$(CONFIG_ATMEL_PWM) += atmel_pwm.o
obj-$(CONFIG_ATMEL_SSC) += atmel-ssc.o
obj-$(CONFIG_TC1100_WMI) += tc1100-wmi.o
-obj-$(CONFIG_LKDTM) += lkdtm.o
obj-$(CONFIG_TIFM_CORE) += tifm_core.o
obj-$(CONFIG_TIFM_7XX1) += tifm_7xx1.o
obj-$(CONFIG_PHANTOM) += phantom.o
Index: linux-2.6.25-rc1/drivers/misc/lkdtm.c
===================================================================
--- linux-2.6.25-rc1.orig/drivers/misc/lkdtm.c
+++ /dev/null
@@ -1,345 +0,0 @@
-/*
- * Kprobe module for testing crash dumps
- *
- * 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, 2006
- *
- * Author: Ankita Garg <ankita@...ibm.com>
- *
- * This module induces system failures at predefined crashpoints to
- * evaluate the reliability of crash dumps obtained using different dumping
- * solutions.
- *
- * It is adapted from the Linux Kernel Dump Test Tool by
- * Fernando Luis Vazquez Cao <http://lkdtt.sourceforge.net>
- *
- * Usage : insmod lkdtm.ko [recur_count={>0}] cpoint_name=<> cpoint_type=<>
- * [cpoint_count={>0}]
- *
- * recur_count : Recursion level for the stack overflow test. Default is 10.
- *
- * cpoint_name : Crash point where the kernel is to be crashed. It can be
- * one of INT_HARDWARE_ENTRY, INT_HW_IRQ_EN, INT_TASKLET_ENTRY,
- * FS_DEVRW, MEM_SWAPOUT, TIMERADD, SCSI_DISPATCH_CMD,
- * IDE_CORE_CP
- *
- * cpoint_type : Indicates the action to be taken on hitting the crash point.
- * It can be one of PANIC, BUG, EXCEPTION, LOOP, OVERFLOW
- *
- * cpoint_count : Indicates the number of times the crash point is to be hit
- * to trigger an action. The default is 10.
- */
-
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/module.h>
-#include <linux/buffer_head.h>
-#include <linux/kprobes.h>
-#include <linux/list.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/hrtimer.h>
-#include <scsi/scsi_cmnd.h>
-
-#ifdef CONFIG_IDE
-#include <linux/ide.h>
-#endif
-
-#define NUM_CPOINTS 8
-#define NUM_CPOINT_TYPES 5
-#define DEFAULT_COUNT 10
-#define REC_NUM_DEFAULT 10
-
-enum cname {
- INVALID,
- INT_HARDWARE_ENTRY,
- INT_HW_IRQ_EN,
- INT_TASKLET_ENTRY,
- FS_DEVRW,
- MEM_SWAPOUT,
- TIMERADD,
- SCSI_DISPATCH_CMD,
- IDE_CORE_CP
-};
-
-enum ctype {
- NONE,
- PANIC,
- BUG,
- EXCEPTION,
- LOOP,
- OVERFLOW
-};
-
-static char* cp_name[] = {
- "INT_HARDWARE_ENTRY",
- "INT_HW_IRQ_EN",
- "INT_TASKLET_ENTRY",
- "FS_DEVRW",
- "MEM_SWAPOUT",
- "TIMERADD",
- "SCSI_DISPATCH_CMD",
- "IDE_CORE_CP"
-};
-
-static char* cp_type[] = {
- "PANIC",
- "BUG",
- "EXCEPTION",
- "LOOP",
- "OVERFLOW"
-};
-
-static struct jprobe lkdtm;
-
-static int lkdtm_parse_commandline(void);
-static void lkdtm_handler(void);
-
-static char* cpoint_name;
-static char* cpoint_type;
-static int cpoint_count = DEFAULT_COUNT;
-static int recur_count = REC_NUM_DEFAULT;
-
-static enum cname cpoint = INVALID;
-static enum ctype cptype = NONE;
-static int count = DEFAULT_COUNT;
-
-module_param(recur_count, int, 0644);
-MODULE_PARM_DESC(recur_count, " Recursion level for the stack overflow test, "\
- "default is 10");
-module_param(cpoint_name, charp, 0644);
-MODULE_PARM_DESC(cpoint_name, " Crash Point, where kernel is to be crashed");
-module_param(cpoint_type, charp, 0644);
-MODULE_PARM_DESC(cpoint_type, " Crash Point Type, action to be taken on "\
- "hitting the crash point");
-module_param(cpoint_count, int, 0644);
-MODULE_PARM_DESC(cpoint_count, " Crash Point Count, number of times the "\
- "crash point is to be hit to trigger action");
-
-static unsigned int jp_do_irq(unsigned int irq)
-{
- lkdtm_handler();
- jprobe_return();
- return 0;
-}
-
-static irqreturn_t jp_handle_irq_event(unsigned int irq,
- struct irqaction *action)
-{
- lkdtm_handler();
- jprobe_return();
- return 0;
-}
-
-static void jp_tasklet_action(struct softirq_action *a)
-{
- lkdtm_handler();
- jprobe_return();
-}
-
-static void jp_ll_rw_block(int rw, int nr, struct buffer_head *bhs[])
-{
- lkdtm_handler();
- jprobe_return();
-}
-
-struct scan_control;
-
-static unsigned long jp_shrink_inactive_list(unsigned long max_scan,
- struct zone *zone,
- struct scan_control *sc)
-{
- lkdtm_handler();
- jprobe_return();
- return 0;
-}
-
-static int jp_hrtimer_start(struct hrtimer *timer, ktime_t tim,
- const enum hrtimer_mode mode)
-{
- lkdtm_handler();
- jprobe_return();
- return 0;
-}
-
-static int jp_scsi_dispatch_cmd(struct scsi_cmnd *cmd)
-{
- lkdtm_handler();
- jprobe_return();
- return 0;
-}
-
-#ifdef CONFIG_IDE
-int jp_generic_ide_ioctl(ide_drive_t *drive, struct file *file,
- struct block_device *bdev, unsigned int cmd,
- unsigned long arg)
-{
- lkdtm_handler();
- jprobe_return();
- return 0;
-}
-#endif
-
-static int lkdtm_parse_commandline(void)
-{
- int i;
-
- if (cpoint_name == INVALID || cpoint_type == NONE ||
- cpoint_count < 1 || recur_count < 1)
- return -EINVAL;
-
- for (i = 0; i < NUM_CPOINTS; ++i) {
- if (!strcmp(cpoint_name, cp_name[i])) {
- cpoint = i + 1;
- break;
- }
- }
-
- for (i = 0; i < NUM_CPOINT_TYPES; ++i) {
- if (!strcmp(cpoint_type, cp_type[i])) {
- cptype = i + 1;
- break;
- }
- }
-
- if (cpoint == INVALID || cptype == NONE)
- return -EINVAL;
-
- count = cpoint_count;
-
- return 0;
-}
-
-static int recursive_loop(int a)
-{
- char buf[1024];
-
- memset(buf,0xFF,1024);
- recur_count--;
- if (!recur_count)
- return 0;
- else
- return recursive_loop(a);
-}
-
-void lkdtm_handler(void)
-{
- printk(KERN_INFO "lkdtm : Crash point %s of type %s hit\n",
- cpoint_name, cpoint_type);
- --count;
-
- if (count == 0) {
- switch (cptype) {
- case NONE:
- break;
- case PANIC:
- printk(KERN_INFO "lkdtm : PANIC\n");
- panic("dumptest");
- break;
- case BUG:
- printk(KERN_INFO "lkdtm : BUG\n");
- BUG();
- break;
- case EXCEPTION:
- printk(KERN_INFO "lkdtm : EXCEPTION\n");
- *((int *) 0) = 0;
- break;
- case LOOP:
- printk(KERN_INFO "lkdtm : LOOP\n");
- for (;;);
- break;
- case OVERFLOW:
- printk(KERN_INFO "lkdtm : OVERFLOW\n");
- (void) recursive_loop(0);
- break;
- default:
- break;
- }
- count = cpoint_count;
- }
-}
-
-static int __init lkdtm_module_init(void)
-{
- int ret;
-
- if (lkdtm_parse_commandline() == -EINVAL) {
- printk(KERN_INFO "lkdtm : Invalid command\n");
- return -EINVAL;
- }
-
- switch (cpoint) {
- case INT_HARDWARE_ENTRY:
- lkdtm.kp.symbol_name = "__do_IRQ";
- lkdtm.entry = (kprobe_opcode_t*) jp_do_irq;
- break;
- case INT_HW_IRQ_EN:
- lkdtm.kp.symbol_name = "handle_IRQ_event";
- lkdtm.entry = (kprobe_opcode_t*) jp_handle_irq_event;
- break;
- case INT_TASKLET_ENTRY:
- lkdtm.kp.symbol_name = "tasklet_action";
- lkdtm.entry = (kprobe_opcode_t*) jp_tasklet_action;
- break;
- case FS_DEVRW:
- lkdtm.kp.symbol_name = "ll_rw_block";
- lkdtm.entry = (kprobe_opcode_t*) jp_ll_rw_block;
- break;
- case MEM_SWAPOUT:
- lkdtm.kp.symbol_name = "shrink_inactive_list";
- lkdtm.entry = (kprobe_opcode_t*) jp_shrink_inactive_list;
- break;
- case TIMERADD:
- lkdtm.kp.symbol_name = "hrtimer_start";
- lkdtm.entry = (kprobe_opcode_t*) jp_hrtimer_start;
- break;
- case SCSI_DISPATCH_CMD:
- lkdtm.kp.symbol_name = "scsi_dispatch_cmd";
- lkdtm.entry = (kprobe_opcode_t*) jp_scsi_dispatch_cmd;
- break;
- case IDE_CORE_CP:
-#ifdef CONFIG_IDE
- lkdtm.kp.symbol_name = "generic_ide_ioctl";
- lkdtm.entry = (kprobe_opcode_t*) jp_generic_ide_ioctl;
-#else
- printk(KERN_INFO "lkdtm : Crash point not available\n");
-#endif
- break;
- default:
- printk(KERN_INFO "lkdtm : Invalid Crash Point\n");
- break;
- }
-
- if ((ret = register_jprobe(&lkdtm)) < 0) {
- printk(KERN_INFO "lkdtm : Couldn't register jprobe\n");
- return ret;
- }
-
- printk(KERN_INFO "lkdtm : Crash point %s of type %s registered\n",
- cpoint_name, cpoint_type);
- return 0;
-}
-
-static void __exit lkdtm_module_exit(void)
-{
- unregister_jprobe(&lkdtm);
- printk(KERN_INFO "lkdtm : Crash point unregistered\n");
-}
-
-module_init(lkdtm_module_init);
-module_exit(lkdtm_module_exit);
-
-MODULE_LICENSE("GPL");
Index: linux-2.6.25-rc1/lib/Kconfig.debug
===================================================================
--- linux-2.6.25-rc1.orig/lib/Kconfig.debug
+++ linux-2.6.25-rc1/lib/Kconfig.debug
@@ -490,21 +490,6 @@ config BACKTRACE_SELF_TEST
Say N if you are unsure.
-config LKDTM
- tristate "Linux Kernel Dump Test Tool Module"
- depends on DEBUG_KERNEL
- depends on KPROBES
- default n
- help
- This module enables testing of the different dumping mechanisms by
- inducing system failures at predefined crash points.
- If you don't need it: say N
- Choose M here to compile this code as a module. The module will be
- called lkdtm.
-
- Documentation on how to use the module can be found in
- drivers/misc/lkdtm.c
-
config FAULT_INJECTION
bool "Fault-injection framework"
depends on DEBUG_KERNEL
Index: linux-2.6.25-rc1/tests/Kconfig
===================================================================
--- linux-2.6.25-rc1.orig/tests/Kconfig
+++ linux-2.6.25-rc1/tests/Kconfig
@@ -37,4 +37,19 @@ config RT_MUTEX_TESTER
help
This option enables a rt-mutex tester.
+config LKDTM
+ tristate "Linux Kernel Dump Test Tool Module"
+ depends on DEBUG_KERNEL
+ depends on KPROBES
+ default n
+ help
+ This module enables testing of the different dumping mechanisms by
+ inducing system failures at predefined crash points.
+ If you don't need it: say N
+ Choose M here to compile this code as a module. The module will be
+ called lkdtm.
+
+ Documentation on how to use the module can be found in
+ tests/lkdtm.c
+
endif # KERNEL_TESTS
Index: linux-2.6.25-rc1/tests/Makefile
===================================================================
--- linux-2.6.25-rc1.orig/tests/Makefile
+++ linux-2.6.25-rc1/tests/Makefile
@@ -5,3 +5,4 @@
obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o
obj-$(CONFIG_RCU_TORTURE_TEST) += rcutorture.o
obj-$(CONFIG_RT_MUTEX_TESTER) += rtmutex-tester.o
+obj-$(CONFIG_LKDTM) += lkdtm.o
Index: linux-2.6.25-rc1/tests/lkdtm.c
===================================================================
--- /dev/null
+++ linux-2.6.25-rc1/tests/lkdtm.c
@@ -0,0 +1,345 @@
+/*
+ * Kprobe module for testing crash dumps
+ *
+ * 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, 2006
+ *
+ * Author: Ankita Garg <ankita@...ibm.com>
+ *
+ * This module induces system failures at predefined crashpoints to
+ * evaluate the reliability of crash dumps obtained using different dumping
+ * solutions.
+ *
+ * It is adapted from the Linux Kernel Dump Test Tool by
+ * Fernando Luis Vazquez Cao <http://lkdtt.sourceforge.net>
+ *
+ * Usage : insmod lkdtm.ko [recur_count={>0}] cpoint_name=<> cpoint_type=<>
+ * [cpoint_count={>0}]
+ *
+ * recur_count : Recursion level for the stack overflow test. Default is 10.
+ *
+ * cpoint_name : Crash point where the kernel is to be crashed. It can be
+ * one of INT_HARDWARE_ENTRY, INT_HW_IRQ_EN, INT_TASKLET_ENTRY,
+ * FS_DEVRW, MEM_SWAPOUT, TIMERADD, SCSI_DISPATCH_CMD,
+ * IDE_CORE_CP
+ *
+ * cpoint_type : Indicates the action to be taken on hitting the crash point.
+ * It can be one of PANIC, BUG, EXCEPTION, LOOP, OVERFLOW
+ *
+ * cpoint_count : Indicates the number of times the crash point is to be hit
+ * to trigger an action. The default is 10.
+ */
+
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/module.h>
+#include <linux/buffer_head.h>
+#include <linux/kprobes.h>
+#include <linux/list.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/hrtimer.h>
+#include <scsi/scsi_cmnd.h>
+
+#ifdef CONFIG_IDE
+#include <linux/ide.h>
+#endif
+
+#define NUM_CPOINTS 8
+#define NUM_CPOINT_TYPES 5
+#define DEFAULT_COUNT 10
+#define REC_NUM_DEFAULT 10
+
+enum cname {
+ INVALID,
+ INT_HARDWARE_ENTRY,
+ INT_HW_IRQ_EN,
+ INT_TASKLET_ENTRY,
+ FS_DEVRW,
+ MEM_SWAPOUT,
+ TIMERADD,
+ SCSI_DISPATCH_CMD,
+ IDE_CORE_CP
+};
+
+enum ctype {
+ NONE,
+ PANIC,
+ BUG,
+ EXCEPTION,
+ LOOP,
+ OVERFLOW
+};
+
+static char* cp_name[] = {
+ "INT_HARDWARE_ENTRY",
+ "INT_HW_IRQ_EN",
+ "INT_TASKLET_ENTRY",
+ "FS_DEVRW",
+ "MEM_SWAPOUT",
+ "TIMERADD",
+ "SCSI_DISPATCH_CMD",
+ "IDE_CORE_CP"
+};
+
+static char* cp_type[] = {
+ "PANIC",
+ "BUG",
+ "EXCEPTION",
+ "LOOP",
+ "OVERFLOW"
+};
+
+static struct jprobe lkdtm;
+
+static int lkdtm_parse_commandline(void);
+static void lkdtm_handler(void);
+
+static char* cpoint_name;
+static char* cpoint_type;
+static int cpoint_count = DEFAULT_COUNT;
+static int recur_count = REC_NUM_DEFAULT;
+
+static enum cname cpoint = INVALID;
+static enum ctype cptype = NONE;
+static int count = DEFAULT_COUNT;
+
+module_param(recur_count, int, 0644);
+MODULE_PARM_DESC(recur_count, " Recursion level for the stack overflow test, "\
+ "default is 10");
+module_param(cpoint_name, charp, 0644);
+MODULE_PARM_DESC(cpoint_name, " Crash Point, where kernel is to be crashed");
+module_param(cpoint_type, charp, 0644);
+MODULE_PARM_DESC(cpoint_type, " Crash Point Type, action to be taken on "\
+ "hitting the crash point");
+module_param(cpoint_count, int, 0644);
+MODULE_PARM_DESC(cpoint_count, " Crash Point Count, number of times the "\
+ "crash point is to be hit to trigger action");
+
+static unsigned int jp_do_irq(unsigned int irq)
+{
+ lkdtm_handler();
+ jprobe_return();
+ return 0;
+}
+
+static irqreturn_t jp_handle_irq_event(unsigned int irq,
+ struct irqaction *action)
+{
+ lkdtm_handler();
+ jprobe_return();
+ return 0;
+}
+
+static void jp_tasklet_action(struct softirq_action *a)
+{
+ lkdtm_handler();
+ jprobe_return();
+}
+
+static void jp_ll_rw_block(int rw, int nr, struct buffer_head *bhs[])
+{
+ lkdtm_handler();
+ jprobe_return();
+}
+
+struct scan_control;
+
+static unsigned long jp_shrink_inactive_list(unsigned long max_scan,
+ struct zone *zone,
+ struct scan_control *sc)
+{
+ lkdtm_handler();
+ jprobe_return();
+ return 0;
+}
+
+static int jp_hrtimer_start(struct hrtimer *timer, ktime_t tim,
+ const enum hrtimer_mode mode)
+{
+ lkdtm_handler();
+ jprobe_return();
+ return 0;
+}
+
+static int jp_scsi_dispatch_cmd(struct scsi_cmnd *cmd)
+{
+ lkdtm_handler();
+ jprobe_return();
+ return 0;
+}
+
+#ifdef CONFIG_IDE
+int jp_generic_ide_ioctl(ide_drive_t *drive, struct file *file,
+ struct block_device *bdev, unsigned int cmd,
+ unsigned long arg)
+{
+ lkdtm_handler();
+ jprobe_return();
+ return 0;
+}
+#endif
+
+static int lkdtm_parse_commandline(void)
+{
+ int i;
+
+ if (cpoint_name == INVALID || cpoint_type == NONE ||
+ cpoint_count < 1 || recur_count < 1)
+ return -EINVAL;
+
+ for (i = 0; i < NUM_CPOINTS; ++i) {
+ if (!strcmp(cpoint_name, cp_name[i])) {
+ cpoint = i + 1;
+ break;
+ }
+ }
+
+ for (i = 0; i < NUM_CPOINT_TYPES; ++i) {
+ if (!strcmp(cpoint_type, cp_type[i])) {
+ cptype = i + 1;
+ break;
+ }
+ }
+
+ if (cpoint == INVALID || cptype == NONE)
+ return -EINVAL;
+
+ count = cpoint_count;
+
+ return 0;
+}
+
+static int recursive_loop(int a)
+{
+ char buf[1024];
+
+ memset(buf,0xFF,1024);
+ recur_count--;
+ if (!recur_count)
+ return 0;
+ else
+ return recursive_loop(a);
+}
+
+void lkdtm_handler(void)
+{
+ printk(KERN_INFO "lkdtm : Crash point %s of type %s hit\n",
+ cpoint_name, cpoint_type);
+ --count;
+
+ if (count == 0) {
+ switch (cptype) {
+ case NONE:
+ break;
+ case PANIC:
+ printk(KERN_INFO "lkdtm : PANIC\n");
+ panic("dumptest");
+ break;
+ case BUG:
+ printk(KERN_INFO "lkdtm : BUG\n");
+ BUG();
+ break;
+ case EXCEPTION:
+ printk(KERN_INFO "lkdtm : EXCEPTION\n");
+ *((int *) 0) = 0;
+ break;
+ case LOOP:
+ printk(KERN_INFO "lkdtm : LOOP\n");
+ for (;;);
+ break;
+ case OVERFLOW:
+ printk(KERN_INFO "lkdtm : OVERFLOW\n");
+ (void) recursive_loop(0);
+ break;
+ default:
+ break;
+ }
+ count = cpoint_count;
+ }
+}
+
+static int __init lkdtm_module_init(void)
+{
+ int ret;
+
+ if (lkdtm_parse_commandline() == -EINVAL) {
+ printk(KERN_INFO "lkdtm : Invalid command\n");
+ return -EINVAL;
+ }
+
+ switch (cpoint) {
+ case INT_HARDWARE_ENTRY:
+ lkdtm.kp.symbol_name = "__do_IRQ";
+ lkdtm.entry = (kprobe_opcode_t*) jp_do_irq;
+ break;
+ case INT_HW_IRQ_EN:
+ lkdtm.kp.symbol_name = "handle_IRQ_event";
+ lkdtm.entry = (kprobe_opcode_t*) jp_handle_irq_event;
+ break;
+ case INT_TASKLET_ENTRY:
+ lkdtm.kp.symbol_name = "tasklet_action";
+ lkdtm.entry = (kprobe_opcode_t*) jp_tasklet_action;
+ break;
+ case FS_DEVRW:
+ lkdtm.kp.symbol_name = "ll_rw_block";
+ lkdtm.entry = (kprobe_opcode_t*) jp_ll_rw_block;
+ break;
+ case MEM_SWAPOUT:
+ lkdtm.kp.symbol_name = "shrink_inactive_list";
+ lkdtm.entry = (kprobe_opcode_t*) jp_shrink_inactive_list;
+ break;
+ case TIMERADD:
+ lkdtm.kp.symbol_name = "hrtimer_start";
+ lkdtm.entry = (kprobe_opcode_t*) jp_hrtimer_start;
+ break;
+ case SCSI_DISPATCH_CMD:
+ lkdtm.kp.symbol_name = "scsi_dispatch_cmd";
+ lkdtm.entry = (kprobe_opcode_t*) jp_scsi_dispatch_cmd;
+ break;
+ case IDE_CORE_CP:
+#ifdef CONFIG_IDE
+ lkdtm.kp.symbol_name = "generic_ide_ioctl";
+ lkdtm.entry = (kprobe_opcode_t*) jp_generic_ide_ioctl;
+#else
+ printk(KERN_INFO "lkdtm : Crash point not available\n");
+#endif
+ break;
+ default:
+ printk(KERN_INFO "lkdtm : Invalid Crash Point\n");
+ break;
+ }
+
+ if ((ret = register_jprobe(&lkdtm)) < 0) {
+ printk(KERN_INFO "lkdtm : Couldn't register jprobe\n");
+ return ret;
+ }
+
+ printk(KERN_INFO "lkdtm : Crash point %s of type %s registered\n",
+ cpoint_name, cpoint_type);
+ return 0;
+}
+
+static void __exit lkdtm_module_exit(void)
+{
+ unregister_jprobe(&lkdtm);
+ printk(KERN_INFO "lkdtm : Crash point unregistered\n");
+}
+
+module_init(lkdtm_module_init);
+module_exit(lkdtm_module_exit);
+
+MODULE_LICENSE("GPL");
--
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