--- /dev/null
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * 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 version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2012, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * libcfs/libcfs/linux/linux-debug.c
+ *
+ * Author: Phil Schwan <phil@clusterfs.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kmod.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>
+#include <linux/unistd.h>
+#include <linux/interrupt.h>
+#include <linux/completion.h>
+#include <linux/fs.h>
+#include <linux/uaccess.h>
+#include <linux/miscdevice.h>
+
+# define DEBUG_SUBSYSTEM S_LNET
+
+#include "../../../include/linux/libcfs/libcfs.h"
+
+#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";
+
+/**
+ * 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};
+
+ 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]);
+ }
+}
+
+void libcfs_run_upcall(char **argv)
+{
+ int rc;
+ int argc;
+ char *envp[] = {
+ "HOME=/",
+ "PATH=/sbin:/bin:/usr/sbin:/usr/bin",
+ NULL};
+
+ argv[0] = lnet_upcall;
+ argc = 1;
+ while (argv[argc] != NULL)
+ argc++;
+
+ 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 ? "" : ",...");
+ }
+}
+
+void libcfs_run_lbug_upcall(struct libcfs_debug_msg_data *msgdata)
+{
+ char *argv[6];
+ char buf[32];
+
+ snprintf(buf, sizeof(buf), "%d", msgdata->msg_line);
+
+ argv[1] = "LBUG";
+ argv[2] = (char *)msgdata->msg_file;
+ argv[3] = (char *)msgdata->msg_fn;
+ argv[4] = buf;
+ argv[5] = NULL;
+
+ libcfs_run_upcall (argv);
+}
+
+/* coverity[+kill] */
+void lbug_with_loc(struct libcfs_debug_msg_data *msgdata)
+{
+ libcfs_catastrophe = 1;
+ libcfs_debug_msg(msgdata, "LBUG\n");
+
+ if (in_interrupt()) {
+ panic("LBUG in interrupt.\n");
+ /* not reached */
+ }
+
+ dump_stack();
+ 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();
+}
+
+static int panic_notifier(struct notifier_block *self, unsigned long unused1,
+ void *unused2)
+{
+ if (libcfs_panic_in_progress)
+ return 0;
+
+ libcfs_panic_in_progress = 1;
+ mb();
+
+ return 0;
+}
+
+static struct notifier_block libcfs_panic_notifier = {
+ .notifier_call = panic_notifier,
+ .next = NULL,
+ .priority = 10000,
+};
+
+void libcfs_register_panic_notifier(void)
+{
+ atomic_notifier_chain_register(&panic_notifier_list, &libcfs_panic_notifier);
+}
+
+void libcfs_unregister_panic_notifier(void)
+{
+ atomic_notifier_chain_unregister(&panic_notifier_list, &libcfs_panic_notifier);
+}
+
+EXPORT_SYMBOL(libcfs_run_upcall);
+EXPORT_SYMBOL(libcfs_run_lbug_upcall);
+EXPORT_SYMBOL(lbug_with_loc);
Code Review / kvmfornfv.git / blobdiff