-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2012, 2013, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Author: Phil Schwan <phil@clusterfs.com>
*/
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
-
-#ifndef AUTOCONF_INCLUDED
-#include <linux/config.h>
-#endif
#include <linux/module.h>
#include <linux/kmod.h>
#include <linux/notifier.h>
#include <linux/string.h>
#include <linux/stat.h>
#include <linux/errno.h>
+#ifdef HAVE_KERNEL_LOCKED
#include <linux/smp_lock.h>
+#endif
#include <linux/unistd.h>
#include <linux/interrupt.h>
-#include <asm/system.h>
#include <asm/uaccess.h>
#include <linux/completion.h>
#include "tracefile.h"
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
#include <linux/kallsyms.h>
-#endif
char lnet_upcall[1024] = "/usr/lib/lustre/lnet_upcall";
+char lnet_debug_log_upcall[1024] = "/usr/lib/lustre/lnet_debug_log_upcall";
+
+/**
+ * Upcall function once a Lustre log has been dumped.
+ *
+ * \param file path of the dumped log
+ */
+void libcfs_run_debug_log_upcall(char *file)
+{
+ char *argv[3];
+ int rc;
+ char *envp[] = {
+ "HOME=/",
+ "PATH=/sbin:/bin:/usr/sbin:/usr/bin",
+ NULL};
+ ENTRY;
+
+ argv[0] = lnet_debug_log_upcall;
+
+ LASSERTF(file != NULL, "called on a null filename\n");
+ argv[1] = file; //only need to pass the path of the file
+
+ argv[2] = NULL;
+
+ rc = call_usermodehelper(argv[0], argv, envp, 1);
+ if (rc < 0 && rc != -ENOENT) {
+ CERROR("Error %d invoking LNET debug log upcall %s %s; "
+ "check /proc/sys/lnet/debug_log_upcall\n",
+ rc, argv[0], argv[1]);
+ } else {
+ CDEBUG(D_HA, "Invoked LNET debug log upcall %s %s\n",
+ argv[0], argv[1]);
+ }
+
+ EXIT;
+}
void libcfs_run_upcall(char **argv)
{
LASSERT(argc >= 2);
- rc = USERMODEHELPER(argv[0], argv, envp);
+ rc = call_usermodehelper(argv[0], argv, envp, 1);
if (rc < 0 && rc != -ENOENT) {
CERROR("Error %d invoking LNET upcall %s %s%s%s%s%s%s%s%s; "
"check /proc/sys/lnet/upcall\n",
}
}
-void libcfs_run_lbug_upcall(char *file, const char *fn, const int line)
+void libcfs_run_lbug_upcall(struct libcfs_debug_msg_data *msgdata)
{
char *argv[6];
char buf[32];
ENTRY;
- snprintf (buf, sizeof buf, "%d", line);
+ snprintf (buf, sizeof buf, "%d", msgdata->msg_line);
argv[1] = "LBUG";
- argv[2] = file;
- argv[3] = (char *)fn;
+ argv[2] = (char *)msgdata->msg_file;
+ argv[3] = (char *)msgdata->msg_fn;
argv[4] = buf;
argv[5] = NULL;
libcfs_run_upcall (argv);
}
-#ifdef __arch_um__
-void lbug_with_loc(char *file, const char *func, const int line)
-{
- libcfs_catastrophe = 1;
- libcfs_debug_msg(NULL, 0, D_EMERG, file, func, line,
- "LBUG - trying to dump log to %s\n", debug_file_path);
- libcfs_debug_dumplog();
- libcfs_run_lbug_upcall(file, func, line);
- asm("int $3");
- panic("LBUG");
-}
-#else
/* coverity[+kill] */
-void lbug_with_loc(char *file, const char *func, const int line)
+void lbug_with_loc(struct libcfs_debug_msg_data *msgdata)
{
libcfs_catastrophe = 1;
- libcfs_debug_msg(NULL, 0, D_EMERG, file, func, line, "LBUG\n");
+ libcfs_debug_msg(msgdata, "LBUG\n");
if (in_interrupt()) {
panic("LBUG in interrupt.\n");
}
libcfs_debug_dumpstack(NULL);
- libcfs_debug_dumplog();
- libcfs_run_lbug_upcall(file, func, line);
+ if (!libcfs_panic_on_lbug)
+ libcfs_debug_dumplog();
+ libcfs_run_lbug_upcall(msgdata);
if (libcfs_panic_on_lbug)
panic("LBUG");
set_task_state(current, TASK_UNINTERRUPTIBLE);
while (1)
schedule();
}
-#endif /* __arch_um__ */
#ifdef __KERNEL__
-void libcfs_debug_dumpstack(struct task_struct *tsk)
+#include <linux/nmi.h>
+#include <asm/stacktrace.h>
+
+#ifdef HAVE_STACKTRACE_WARNING
+static void
+print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
+{
+ printk("%s", (char *)data);
+ print_symbol(msg, symbol);
+ printk("\n");
+}
+
+static void print_trace_warning(void *data, char *msg)
{
-#if defined(__arch_um__)
- if (tsk != NULL)
- CWARN("stack dump for pid %d (%d) requested; wake up gdb.\n",
- tsk->pid, UML_PID(tsk));
- //asm("int $3");
-#elif defined(HAVE_SHOW_TASK)
- /* this is exported by lustre kernel version 42 */
- extern void show_task(struct task_struct *);
+ printk("%s%s\n", (char *)data, msg);
+}
+#endif
+static int print_trace_stack(void *data, char *name)
+{
+ printk(" <%s> ", name);
+ return 0;
+}
+
+static void print_trace_address(void *data, unsigned long addr, int reliable)
+{
+ char fmt[32];
+
+ touch_nmi_watchdog();
+ sprintf(fmt, " [<%016lx>] %s%%s\n", addr, reliable ? "": "? ");
+ __print_symbol(fmt, addr);
+}
+
+static const struct stacktrace_ops print_trace_ops = {
+#ifdef HAVE_STACKTRACE_WARNING
+ .warning = print_trace_warning,
+ .warning_symbol = print_trace_warning_symbol,
+#endif
+ .stack = print_trace_stack,
+ .address = print_trace_address,
+#ifdef STACKTRACE_OPS_HAVE_WALK_STACK
+ .walk_stack = print_context_stack,
+#endif
+};
+
+void libcfs_debug_dumpstack(struct task_struct *tsk)
+{
+ /* dump_stack() */
+ /* show_trace() */
if (tsk == NULL)
tsk = current;
- CWARN("showing stack for process %d\n", tsk->pid);
- show_task(tsk);
-#else
- if ((tsk == NULL) || (tsk == current))
- dump_stack();
- else
- CWARN("can't show stack: kernel doesn't export show_task\n");
-#endif
+ printk("Pid: %d, comm: %.20s\n", tsk->pid, tsk->comm);
+ /* show_trace_log_lvl() */
+ printk("\nCall Trace:\n");
+ dump_trace(tsk, NULL, NULL,
+#ifdef HAVE_DUMP_TRACE_ADDRESS
+ 0,
+#endif /* HAVE_DUMP_TRACE_ADDRESS */
+ &print_trace_ops, NULL);
+ printk("\n");
}
-cfs_task_t *libcfs_current(void)
+struct task_struct *libcfs_current(void)
{
CWARN("current task struct is %p\n", current);
return current;
* console on the rare cases it is ever triggered. */
if (in_interrupt()) {
- trace_debug_print();
+ cfs_trace_debug_print();
} else {
- while (current->lock_depth >= 0)
- unlock_kernel();
-
- libcfs_debug_dumplog_internal((void *)(long)cfs_curproc_pid());
+# ifdef HAVE_KERNEL_LOCKED
+ while (kernel_locked())
+ unlock_kernel();
+# endif
+ libcfs_debug_dumplog_internal((void *)(long)current_pid());
}
#endif
return 0;
void libcfs_register_panic_notifier(void)
{
-#ifdef HAVE_ATOMIC_PANIC_NOTIFIER
atomic_notifier_chain_register(&panic_notifier_list, &libcfs_panic_notifier);
-#else
- notifier_chain_register(&panic_notifier_list, &libcfs_panic_notifier);
-#endif
}
void libcfs_unregister_panic_notifier(void)
{
-#ifdef HAVE_ATOMIC_PANIC_NOTIFIER
atomic_notifier_chain_unregister(&panic_notifier_list, &libcfs_panic_notifier);
-#else
- notifier_chain_unregister(&panic_notifier_list, &libcfs_panic_notifier);
-#endif
}
EXPORT_SYMBOL(libcfs_debug_dumpstack);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff