* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2012, 2013, Intel Corporation.
+ * Copyright (c) 2012, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Author: Phil Schwan <phil@clusterfs.com>
*/
-#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/kallsyms.h>
#include <linux/kmod.h>
+#include <linux/module.h>
#include <linux/notifier.h>
-#include <linux/kernel.h>
-#include <linux/mm.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/string.h>
#include <linux/unistd.h>
-#include <linux/interrupt.h>
-#include <asm/uaccess.h>
-#include <linux/completion.h>
-
-#include <linux/fs.h>
-#include <linux/stat.h>
-#include <asm/uaccess.h>
-#include <linux/miscdevice.h>
-#include <linux/version.h>
+#include <linux/stacktrace.h>
+#include <linux/utsname.h>
# define DEBUG_SUBSYSTEM S_LNET
#include "tracefile.h"
-#include <linux/kallsyms.h>
-
-char lnet_upcall[1024] = "/usr/lib/lustre/lnet_upcall";
char lnet_debug_log_upcall[1024] = "/usr/lib/lustre/lnet_debug_log_upcall";
/**
EXIT;
}
-void libcfs_run_upcall(char **argv)
+/* coverity[+kill] */
+void lbug_with_loc(struct libcfs_debug_msg_data *msgdata)
{
- int rc;
- int argc;
- char *envp[] = {
- "HOME=/",
- "PATH=/sbin:/bin:/usr/sbin:/usr/bin",
- NULL};
- ENTRY;
+ libcfs_catastrophe = 1;
+ libcfs_debug_msg(msgdata, "LBUG\n");
- argv[0] = lnet_upcall;
- argc = 1;
- while (argv[argc] != NULL)
- argc++;
+ if (in_interrupt()) {
+ panic("LBUG in interrupt.\n");
+ /* not reached */
+ }
- LASSERT(argc >= 2);
-
- 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",
- rc, argv[0], argv[1],
- argc < 3 ? "" : ",", argc < 3 ? "" : argv[2],
- argc < 4 ? "" : ",", argc < 4 ? "" : argv[3],
- argc < 5 ? "" : ",", argc < 5 ? "" : argv[4],
- argc < 6 ? "" : ",...");
- } else {
- CDEBUG(D_HA, "Invoked LNET upcall %s %s%s%s%s%s%s%s%s\n",
- argv[0], argv[1],
- argc < 3 ? "" : ",", argc < 3 ? "" : argv[2],
- argc < 4 ? "" : ",", argc < 4 ? "" : argv[3],
- argc < 5 ? "" : ",", argc < 5 ? "" : argv[4],
- argc < 6 ? "" : ",...");
- }
+ libcfs_debug_dumpstack(NULL);
+ if (libcfs_panic_on_lbug)
+ panic("LBUG");
+ else
+ libcfs_debug_dumplog();
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ while (1)
+ schedule();
}
+EXPORT_SYMBOL(lbug_with_loc);
-void libcfs_run_lbug_upcall(struct libcfs_debug_msg_data *msgdata)
-{
- char *argv[6];
- char buf[32];
-
- ENTRY;
- snprintf (buf, sizeof buf, "%d", msgdata->msg_line);
+#ifdef CONFIG_STACKTRACE
- argv[1] = "LBUG";
- argv[2] = (char *)msgdata->msg_file;
- argv[3] = (char *)msgdata->msg_fn;
- argv[4] = buf;
- argv[5] = NULL;
+#ifndef HAVE_SAVE_STACK_TRACE_TSK
+#define save_stack_trace_tsk(tsk, trace) \
+do { \
+ if (tsk == current) \
+ save_stack_trace(trace); \
+ else \
+ pr_info("No stack, save_stack_trace_tsk() not exported\n"); \
+} while (0)
+#endif
- libcfs_run_upcall (argv);
-}
-EXPORT_SYMBOL(libcfs_run_lbug_upcall);
+#define MAX_ST_ENTRIES 100
+static DEFINE_SPINLOCK(st_lock);
-/* coverity[+kill] */
-void lbug_with_loc(struct libcfs_debug_msg_data *msgdata)
+static void libcfs_call_trace(struct task_struct *tsk)
{
- libcfs_catastrophe = 1;
- libcfs_debug_msg(msgdata, "LBUG\n");
-
- if (in_interrupt()) {
- panic("LBUG in interrupt.\n");
- /* not reached */
- }
-
- libcfs_debug_dumpstack(NULL);
- 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();
+ struct stack_trace trace;
+ static unsigned long entries[MAX_ST_ENTRIES];
+
+ trace.nr_entries = 0;
+ trace.max_entries = MAX_ST_ENTRIES;
+ trace.entries = entries;
+ trace.skip = 0;
+
+ spin_lock(&st_lock);
+ pr_info("Pid: %d, comm: %.20s %s %s\n", tsk->pid, tsk->comm,
+ init_utsname()->release, init_utsname()->version);
+ pr_info("Call Trace:\n");
+ save_stack_trace_tsk(tsk, &trace);
+ print_stack_trace(&trace, 0);
+ spin_unlock(&st_lock);
}
-EXPORT_SYMBOL(lbug_with_loc);
+
+#else /* !CONFIG_STACKTRACE */
#ifdef CONFIG_X86
#include <linux/nmi.h>
#include <asm/stacktrace.h>
+#ifdef HAVE_STACKTRACE_OPS
#ifdef HAVE_STACKTRACE_WARNING
static void
print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
{
- printk("%s", (char *)data);
+ printk("%s", (char *)data);
print_symbol(msg, symbol);
printk("\n");
}
.walk_stack = print_context_stack,
#endif
};
+#endif /* HAVE_STACKTRACE_OPS */
static void libcfs_call_trace(struct task_struct *tsk)
{
+#ifdef HAVE_STACKTRACE_OPS
+ printk("Pid: %d, comm: %.20s\n", tsk->pid, tsk->comm);
+ 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");
+#else /* !HAVE_STACKTRACE_OPS */
+ if (tsk == current)
+ dump_stack();
+ else
+ CWARN("can't show stack: kernel doesn't export show_task\n");
+#endif /* HAVE_STACKTRACE_OPS */
}
#else /* !CONFIG_X86 */
static void libcfs_call_trace(struct task_struct *tsk)
{
- if ((tsk == NULL) || (tsk == current))
+ if (tsk == current)
dump_stack();
else
CWARN("can't show stack: kernel doesn't export show_task\n");
#endif /* CONFIG_X86 */
+#endif /* CONFIG_STACKTRACE */
+
void libcfs_debug_dumpstack(struct task_struct *tsk)
{
- /* dump_stack() */
- /* show_trace() */
- if (tsk == NULL)
- tsk = current;
- printk("Pid: %d, comm: %.20s\n", tsk->pid, tsk->comm);
- /* show_trace_log_lvl() */
- printk("\nCall Trace:\n");
- libcfs_call_trace(tsk);
+ libcfs_call_trace(tsk ?: current);
}
EXPORT_SYMBOL(libcfs_debug_dumpstack);
-struct task_struct *libcfs_current(void)
-{
- CWARN("current task struct is %p\n", current);
- return current;
-}
-
static int panic_notifier(struct notifier_block *self, unsigned long unused1,
void *unused2)
{
}
static struct notifier_block libcfs_panic_notifier = {
- notifier_call : panic_notifier,
- next : NULL,
- priority : 10000
+ .notifier_call = panic_notifier,
+ .next = NULL,
+ .priority = 10000
};
void libcfs_register_panic_notifier(void)
git://git.whamcloud.com / fs / lustre-release.git / blobdiff