-/* -*- 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.
*
* 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.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* libcfs/libcfs/debug.c
*
* Author: Phil Schwan <phil@clusterfs.com>
+ *
*/
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
-
# define DEBUG_SUBSYSTEM S_LNET
-#include <libcfs/libcfs.h>
+#include <linux/module.h>
+#include <linux/ctype.h>
+#include <libcfs/libcfs_string.h>
+#include <linux/kthread.h>
+#include <linux/stacktrace.h>
+#include <linux/utsname.h>
+#include <linux/kallsyms.h>
#include "tracefile.h"
static char debug_file_name[1024];
unsigned int libcfs_subsystem_debug = ~0;
-CFS_MODULE_PARM(libcfs_subsystem_debug, "i", int, 0644,
- "Lustre kernel debug subsystem mask");
EXPORT_SYMBOL(libcfs_subsystem_debug);
+module_param(libcfs_subsystem_debug, int, 0644);
+MODULE_PARM_DESC(libcfs_subsystem_debug, "Lustre kernel debug subsystem mask");
-unsigned int libcfs_debug = (D_EMERG | D_ERROR | D_WARNING | D_CONSOLE |
- D_NETERROR | D_HA | D_CONFIG | D_IOCTL);
-CFS_MODULE_PARM(libcfs_debug, "i", int, 0644,
- "Lustre kernel debug mask");
+unsigned int libcfs_debug = (D_CANTMASK | D_NETERROR | D_HA | D_CONFIG |
+ D_IOCTL | D_LFSCK | D_TTY);
EXPORT_SYMBOL(libcfs_debug);
+module_param(libcfs_debug, int, 0644);
+MODULE_PARM_DESC(libcfs_debug, "Lustre kernel debug mask");
+
+static int libcfs_param_debug_mb_set(const char *val,
+ cfs_kernel_param_arg_t *kp)
+{
+ int rc;
+ unsigned int num;
+
+ rc = kstrtouint(val, 0, &num);
+ if (rc < 0)
+ return rc;
+
+ num = cfs_trace_set_debug_mb(num);
+
+ *((unsigned int *)kp->arg) = num;
+ num = cfs_trace_get_debug_mb();
+ if (num)
+ /* This value is more precise */
+ *((unsigned int *)kp->arg) = num;
-unsigned int libcfs_debug_mb = 0;
-CFS_MODULE_PARM(libcfs_debug_mb, "i", uint, 0644,
- "Total debug buffer size.");
-EXPORT_SYMBOL(libcfs_debug_mb);
+ return 0;
+}
+
+/* While debug_mb setting look like unsigned int, in fact
+ * it needs quite a bunch of extra processing, so we define special
+ * debug_mb parameter type with corresponding methods to handle this case
+ */
+static const struct kernel_param_ops param_ops_debug_mb = {
+ .set = libcfs_param_debug_mb_set,
+ .get = param_get_uint,
+};
+
+#define param_check_debug_mb(name, p) \
+ __param_check(name, p, unsigned int)
+
+static unsigned int libcfs_debug_mb;
+#ifdef HAVE_KERNEL_PARAM_OPS
+module_param(libcfs_debug_mb, debug_mb, 0644);
+#else
+module_param_call(libcfs_debug_mb, libcfs_param_debug_mb_set, param_get_uint,
+ ¶m_ops_debug_mb, 0644);
+#endif
+MODULE_PARM_DESC(libcfs_debug_mb, "Total debug buffer size.");
unsigned int libcfs_printk = D_CANTMASK;
-CFS_MODULE_PARM(libcfs_printk, "i", uint, 0644,
- "Lustre kernel debug console mask");
-EXPORT_SYMBOL(libcfs_printk);
+module_param(libcfs_printk, uint, 0644);
+MODULE_PARM_DESC(libcfs_printk, "Lustre kernel debug console mask");
unsigned int libcfs_console_ratelimit = 1;
-CFS_MODULE_PARM(libcfs_console_ratelimit, "i", uint, 0644,
- "Lustre kernel debug console ratelimit (0 to disable)");
-EXPORT_SYMBOL(libcfs_console_ratelimit);
+module_param(libcfs_console_ratelimit, uint, 0644);
+MODULE_PARM_DESC(libcfs_console_ratelimit, "Lustre kernel debug console ratelimit (0 to disable)");
-cfs_duration_t libcfs_console_max_delay;
-CFS_MODULE_PARM(libcfs_console_max_delay, "l", ulong, 0644,
- "Lustre kernel debug console max delay (jiffies)");
-EXPORT_SYMBOL(libcfs_console_max_delay);
+static int param_set_delay_minmax(const char *val,
+ cfs_kernel_param_arg_t *kp,
+ long min, long max)
+{
+ long d;
+ int sec;
+ int rc;
+
+ rc = kstrtoint(val, 0, &sec);
+ if (rc)
+ return -EINVAL;
+
+ /* The sysfs setting is in centiseconds */
+ d = cfs_time_seconds(sec) / 100;
+ if (d < min || d > max)
+ return -EINVAL;
+
+ *((unsigned int *)kp->arg) = d;
+
+ return 0;
+}
+
+static int param_get_delay(char *buffer, cfs_kernel_param_arg_t *kp)
+{
+ unsigned int d = *(unsigned int *)kp->arg;
-cfs_duration_t libcfs_console_min_delay;
-CFS_MODULE_PARM(libcfs_console_min_delay, "l", ulong, 0644,
- "Lustre kernel debug console min delay (jiffies)");
-EXPORT_SYMBOL(libcfs_console_min_delay);
+ param_get_byte(buffer, kp);
+ return sprintf(buffer, "%lu%c", jiffies_to_msecs(d * 10) / MSEC_PER_SEC,
+ strnchr(buffer, PAGE_SIZE, '\n') ? '\n' : '\0');
+}
+
+unsigned int libcfs_console_max_delay;
+unsigned int libcfs_console_min_delay;
+
+static int param_set_console_max_delay(const char *val,
+ cfs_kernel_param_arg_t *kp)
+{
+ return param_set_delay_minmax(val, kp,
+ libcfs_console_min_delay, INT_MAX);
+}
+
+static const struct kernel_param_ops param_ops_console_max_delay = {
+ .set = param_set_console_max_delay,
+ .get = param_get_delay,
+};
+
+#define param_check_console_max_delay(name, p) \
+ __param_check(name, p, unsigned int)
+
+#ifdef HAVE_KERNEL_PARAM_OPS
+module_param(libcfs_console_max_delay, console_max_delay, 0644);
+#else
+module_param_call(libcfs_console_max_delay, param_set_console_max_delay,
+ param_get_delay, ¶m_ops_console_max_delay, 0644);
+#endif
+MODULE_PARM_DESC(libcfs_console_max_delay, "Lustre kernel debug console max delay (jiffies)");
+
+static int param_set_console_min_delay(const char *val,
+ cfs_kernel_param_arg_t *kp)
+{
+ return param_set_delay_minmax(val, kp,
+ 1, libcfs_console_max_delay);
+}
+
+static const struct kernel_param_ops param_ops_console_min_delay = {
+ .set = param_set_console_min_delay,
+ .get = param_get_delay,
+};
+
+#define param_check_console_min_delay(name, p) \
+ __param_check(name, p, unsigned int)
+
+#ifdef HAVE_KERNEL_PARAM_OPS
+module_param(libcfs_console_min_delay, console_min_delay, 0644);
+#else
+module_param_call(libcfs_console_min_delay, param_set_console_min_delay,
+ param_get_delay, ¶m_ops_console_min_delay, 0644);
+#endif
+MODULE_PARM_DESC(libcfs_console_min_delay, "Lustre kernel debug console min delay (jiffies)");
+
+static int param_set_uint_minmax(const char *val,
+ cfs_kernel_param_arg_t *kp,
+ unsigned int min, unsigned int max)
+{
+ unsigned int num;
+ int ret;
+
+ if (!val)
+ return -EINVAL;
+
+ ret = kstrtouint(val, 0, &num);
+ if (ret < 0 || num < min || num > max)
+ return -EINVAL;
+
+ *((unsigned int *)kp->arg) = num;
+ return 0;
+}
+
+static int param_set_uintpos(const char *val,
+ cfs_kernel_param_arg_t *kp)
+{
+ return param_set_uint_minmax(val, kp, 1, -1);
+}
+
+static const struct kernel_param_ops param_ops_uintpos = {
+ .set = param_set_uintpos,
+ .get = param_get_uint,
+};
+
+#define param_check_uintpos(name, p) \
+ __param_check(name, p, unsigned int)
unsigned int libcfs_console_backoff = CDEBUG_DEFAULT_BACKOFF;
-CFS_MODULE_PARM(libcfs_console_backoff, "i", uint, 0644,
- "Lustre kernel debug console backoff factor");
-EXPORT_SYMBOL(libcfs_console_backoff);
+#ifdef HAVE_KERNEL_PARAM_OPS
+module_param(libcfs_console_backoff, uintpos, 0644);
+#else
+module_param_call(libcfs_console_backoff, param_set_uintpos, param_get_uint,
+ ¶m_ops_uintpos, 0644);
+#endif
+MODULE_PARM_DESC(libcfs_console_backoff, "Lustre kernel debug console backoff factor");
unsigned int libcfs_debug_binary = 1;
-EXPORT_SYMBOL(libcfs_debug_binary);
-unsigned int libcfs_stack;
+unsigned int libcfs_stack = 3 * THREAD_SIZE / 4;
EXPORT_SYMBOL(libcfs_stack);
-unsigned int portal_enter_debugger;
-EXPORT_SYMBOL(portal_enter_debugger);
-
unsigned int libcfs_catastrophe;
EXPORT_SYMBOL(libcfs_catastrophe);
EXPORT_SYMBOL(libcfs_watchdog_ratelimit);
unsigned int libcfs_panic_on_lbug = 1;
-CFS_MODULE_PARM(libcfs_panic_on_lbug, "i", uint, 0644,
- "Lustre kernel panic on LBUG");
-EXPORT_SYMBOL(libcfs_panic_on_lbug);
-
-cfs_atomic_t libcfs_kmemory = CFS_ATOMIC_INIT(0);
-EXPORT_SYMBOL(libcfs_kmemory);
+module_param(libcfs_panic_on_lbug, uint, 0644);
+MODULE_PARM_DESC(libcfs_panic_on_lbug, "Lustre kernel panic on LBUG");
-static cfs_waitq_t debug_ctlwq;
+atomic64_t libcfs_kmem = ATOMIC64_INIT(0);
+EXPORT_SYMBOL(libcfs_kmem);
-char libcfs_debug_file_path_arr[PATH_MAX] = LIBCFS_DEBUG_FILE_PATH_DEFAULT;
+static DECLARE_COMPLETION(debug_complete);
/* We need to pass a pointer here, but elsewhere this must be a const */
-char *libcfs_debug_file_path;
-CFS_MODULE_PARM(libcfs_debug_file_path, "s", charp, 0644,
- "Path for dumping debug logs, "
- "set 'NONE' to prevent log dumping");
+char *libcfs_debug_file_path = LIBCFS_DEBUG_FILE_PATH_DEFAULT;
+EXPORT_SYMBOL(libcfs_debug_file_path);
+module_param(libcfs_debug_file_path, charp, 0644);
+MODULE_PARM_DESC(libcfs_debug_file_path,
+ "Path for dumping debug logs, set 'NONE' to prevent log dumping");
int libcfs_panic_in_progress;
-/* libcfs_debug_token2mask() expects the returned
- * string in lower-case */
-const char *
-libcfs_debug_subsys2str(int subsys)
-{
- switch (1 << subsys) {
- default:
- return NULL;
- case S_UNDEFINED:
- return "undefined";
- case S_MDC:
- return "mdc";
- case S_MDS:
- return "mds";
- case S_OSC:
- return "osc";
- case S_OST:
- return "ost";
- case S_CLASS:
- return "class";
- case S_LOG:
- return "log";
- case S_LLITE:
- return "llite";
- case S_RPC:
- return "rpc";
- case S_LNET:
- return "lnet";
- case S_LND:
- return "lnd";
- case S_PINGER:
- return "pinger";
- case S_FILTER:
- return "filter";
- case S_ECHO:
- return "echo";
- case S_LDLM:
- return "ldlm";
- case S_LOV:
- return "lov";
- case S_LQUOTA:
- return "lquota";
- case S_LMV:
- return "lmv";
- case S_SEC:
- return "sec";
- case S_GSS:
- return "gss";
- case S_MGC:
- return "mgc";
- case S_MGS:
- return "mgs";
- case S_FID:
- return "fid";
- case S_FLD:
- return "fld";
- }
-}
-
-/* libcfs_debug_token2mask() expects the returned
- * string in lower-case */
-const char *
-libcfs_debug_dbg2str(int debug)
-{
- switch (1 << debug) {
- default:
- return NULL;
- case D_TRACE:
- return "trace";
- case D_INODE:
- return "inode";
- case D_SUPER:
- return "super";
- case D_EXT2:
- return "ext2";
- case D_MALLOC:
- return "malloc";
- case D_CACHE:
- return "cache";
- case D_INFO:
- return "info";
- case D_IOCTL:
- return "ioctl";
- case D_NETERROR:
- return "neterror";
- case D_NET:
- return "net";
- case D_WARNING:
- return "warning";
- case D_BUFFS:
- return "buffs";
- case D_OTHER:
- return "other";
- case D_DENTRY:
- return "dentry";
- case D_NETTRACE:
- return "nettrace";
- case D_PAGE:
- return "page";
- case D_DLMTRACE:
- return "dlmtrace";
- case D_ERROR:
- return "error";
- case D_EMERG:
- return "emerg";
- case D_HA:
- return "ha";
- case D_RPCTRACE:
- return "rpctrace";
- case D_VFSTRACE:
- return "vfstrace";
- case D_READA:
- return "reada";
- case D_MMAP:
- return "mmap";
- case D_CONFIG:
- return "config";
- case D_CONSOLE:
- return "console";
- case D_QUOTA:
- return "quota";
- case D_SEC:
- return "sec";
- }
+/* libcfs_debug_token2mask() expects the returned string in lower-case */
+static const char *libcfs_debug_subsys2str(int subsys)
+{
+ static const char * const libcfs_debug_subsystems[] =
+ LIBCFS_DEBUG_SUBSYS_NAMES;
+
+ if (subsys >= ARRAY_SIZE(libcfs_debug_subsystems))
+ return NULL;
+
+ return libcfs_debug_subsystems[subsys];
+}
+
+/* libcfs_debug_token2mask() expects the returned string in lower-case */
+static const char *libcfs_debug_dbg2str(int debug)
+{
+ static const char * const libcfs_debug_masks[] =
+ LIBCFS_DEBUG_MASKS_NAMES;
+
+ if (debug >= ARRAY_SIZE(libcfs_debug_masks))
+ return NULL;
+
+ return libcfs_debug_masks[debug];
}
int
libcfs_debug_mask2str(char *str, int size, int mask, int is_subsys)
{
- const char *(*fn)(int bit) = is_subsys ? libcfs_debug_subsys2str :
- libcfs_debug_dbg2str;
- int len = 0;
- const char *token;
- int i;
-
- if (mask == 0) { /* "0" */
- if (size > 0)
- str[0] = '0';
- len = 1;
- } else { /* space-separated tokens */
- for (i = 0; i < 32; i++) {
- if ((mask & (1 << i)) == 0)
- continue;
-
- token = fn(i);
- if (token == NULL) /* unused bit */
- continue;
-
- if (len > 0) { /* separator? */
- if (len < size)
- str[len] = ' ';
- len++;
- }
-
- while (*token != 0) {
- if (len < size)
- str[len] = *token;
- token++;
- len++;
- }
- }
- }
-
- /* terminate 'str' */
- if (len < size)
- str[len] = 0;
- else
- str[size - 1] = 0;
-
- return len;
+ const char *(*fn)(int bit) = is_subsys ? libcfs_debug_subsys2str :
+ libcfs_debug_dbg2str;
+ int len = 0;
+ const char *token;
+ int i;
+
+ if (mask == 0) { /* "0" */
+ if (size > 0)
+ str[0] = '0';
+ len = 1;
+ } else { /* space-separated tokens */
+ for (i = 0; i < 32; i++) {
+ if ((mask & BIT(i)) == 0)
+ continue;
+
+ token = fn(i);
+ if (!token) /* unused bit */
+ continue;
+
+ if (len > 0) { /* separator? */
+ if (len < size)
+ str[len] = ' ';
+ len++;
+ }
+
+ while (*token != 0) {
+ if (len < size)
+ str[len] = *token;
+ token++;
+ len++;
+ }
+ }
+ }
+
+ /* terminate 'str' */
+ if (len < size)
+ str[len] = 0;
+ else
+ str[size - 1] = 0;
+
+ return len;
}
int
libcfs_debug_str2mask(int *mask, const char *str, int is_subsys)
{
- const char *(*fn)(int bit) = is_subsys ? libcfs_debug_subsys2str :
- libcfs_debug_dbg2str;
- int m = 0;
- int matched;
- int n;
- int t;
-
- /* Allow a number for backwards compatibility */
-
- for (n = strlen(str); n > 0; n--)
- if (!isspace(str[n-1]))
- break;
- matched = n;
+ const char *(*fn)(int bit) = is_subsys ? libcfs_debug_subsys2str :
+ libcfs_debug_dbg2str;
+ int m = 0;
+ int matched;
+ int n;
+ int t;
+
+ /* Allow a number for backwards compatibility */
+ for (n = strlen(str); n > 0; n--)
+ if (!isspace(str[n-1]))
+ break;
+ matched = n;
+ t = sscanf(str, "%i%n", &m, &matched);
+ if (t >= 1 && matched == n) {
+ /* don't print warning for lctl set_param debug=0 or -1 */
+ if (m != 0 && m != -1)
+ CWARN("You are trying to use a numerical value for the mask - this will be deprecated in a future release.\n");
+ *mask = m;
+ return 0;
+ }
+
+ return cfs_str2mask(str, fn, mask, is_subsys ? 0 : D_CANTMASK,
+ 0xffffffff);
+}
- if ((t = sscanf(str, "%i%n", &m, &matched)) >= 1 &&
- matched == n) {
- CWARN("You are trying to use a numerical value for the mask -"
- " this will be deprecated in a future release.\n");
- *mask = m;
- return 0;
- }
+char lnet_debug_log_upcall[1024] = "/usr/lib/lustre/lnet_debug_log_upcall";
- return cfs_str2mask(str, fn, mask, is_subsys ? 0 : D_CANTMASK,
- 0xffffffff);
+/* Upcall function once a Lustre log has been dumped.
+ *
+ * @file path of the dumped log
+ */
+static void libcfs_run_debug_log_upcall(char *file)
+{
+ char *argv[3];
+ int rc;
+ static const char * const envp[] = {
+ "HOME=/",
+ "PATH=/sbin:/bin:/usr/sbin:/usr/bin",
+ NULL
+ };
+
+ ENTRY;
+ argv[0] = lnet_debug_log_upcall;
+
+ LASSERTF(file, "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, (char **)envp, 1);
+ if (rc < 0 && rc != -ENOENT) {
+ CERROR("Error %d invoking LNET debug log upcall %s %s; check /sys/kernel/debug/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]);
+ }
}
/**
* Dump Lustre log to ::debug_file_path by calling tracefile_dump_all_pages()
*/
-void libcfs_debug_dumplog_internal(void *arg)
+static void libcfs_debug_dumplog_internal(void *arg)
+{
+ static time64_t last_dump_time;
+ time64_t current_time;
+
+ current_time = ktime_get_real_seconds();
+
+ if (strncmp(libcfs_debug_file_path, "NONE", 4) != 0 &&
+ current_time > last_dump_time) {
+ last_dump_time = current_time;
+ snprintf(debug_file_name, sizeof(debug_file_name) - 1,
+ "%s.%lld.%ld", libcfs_debug_file_path,
+ (s64)current_time, (uintptr_t)arg);
+ pr_alert("LustreError: dumping log to %s\n", debug_file_name);
+ cfs_tracefile_dump_all_pages(debug_file_name);
+ libcfs_run_debug_log_upcall(debug_file_name);
+ }
+}
+
+static int libcfs_debug_dumplog_thread(void *arg)
{
- CFS_DECL_JOURNAL_DATA;
+ libcfs_debug_dumplog_internal(arg);
+ complete(&debug_complete);
+ return 0;
+}
- CFS_PUSH_JOURNAL;
+static DEFINE_MUTEX(libcfs_debug_dumplog_lock);
- if (strncmp(libcfs_debug_file_path_arr, "NONE", 4) != 0) {
- snprintf(debug_file_name, sizeof(debug_file_name) - 1,
- "%s.%ld." LPLD, libcfs_debug_file_path_arr,
- cfs_time_current_sec(), (long_ptr_t)arg);
- printk(CFS_KERN_ALERT "LustreError: dumping log to %s\n",
- debug_file_name);
- cfs_tracefile_dump_all_pages(debug_file_name);
- libcfs_run_debug_log_upcall(debug_file_name);
- }
- CFS_POP_JOURNAL;
+void libcfs_debug_dumplog(void)
+{
+ struct task_struct *dumper;
+
+ ENTRY;
+
+ if (mutex_trylock(&libcfs_debug_dumplog_lock) == 0)
+ return;
+
+ /* If a previous call was interrupted, debug_complete->done
+ * might be elevated, and so we won't actually wait here.
+ * So we reinit the completion to ensure we wait for
+ * one thread to complete, though it might not be the one
+ * we start if there are overlaping thread.
+ */
+ reinit_completion(&debug_complete);
+ dumper = kthread_run(libcfs_debug_dumplog_thread,
+ (void *)(long)current->pid,
+ "libcfs_debug_dumper");
+ if (IS_ERR(dumper))
+ pr_err("LustreError: cannot start log dump thread: rc = %ld\n",
+ PTR_ERR(dumper));
+ else
+ wait_for_completion_interruptible(&debug_complete);
+
+ mutex_unlock(&libcfs_debug_dumplog_lock);
}
+EXPORT_SYMBOL(libcfs_debug_dumplog);
-int libcfs_debug_dumplog_thread(void *arg)
+/* coverity[+kill] */
+void __noreturn lbug_with_loc(struct libcfs_debug_msg_data *msgdata)
{
- libcfs_debug_dumplog_internal(arg);
- cfs_waitq_signal(&debug_ctlwq);
- return 0;
+ 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)
+ panic("LBUG");
+ else
+ libcfs_debug_dumplog();
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ while (1)
+ schedule();
}
+EXPORT_SYMBOL(lbug_with_loc);
+
+#ifdef CONFIG_STACKTRACE
+
+#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
-void libcfs_debug_dumplog(void)
+static void cfs_print_stack_trace(unsigned long *entries, unsigned int nr)
{
- cfs_waitlink_t wait;
- cfs_task_t *dumper;
- ENTRY;
+ unsigned int i;
+
+ /* Prefer %pB for backtraced symbolic names since it was added in:
+ * Linux v2.6.38-6557-g0f77a8d37825
+ * vsprintf: Introduce %pB format specifier
+ */
+ for (i = 0; i < nr; i++)
+ pr_info("[<0>] %pB\n", (void *)entries[i]);
+}
- /* we're being careful to ensure that the kernel thread is
- * able to set our state to running as it exits before we
- * get to schedule() */
- cfs_waitlink_init(&wait);
- cfs_set_current_state(CFS_TASK_INTERRUPTIBLE);
- cfs_waitq_add(&debug_ctlwq, &wait);
+#define MAX_ST_ENTRIES 100
+static DEFINE_SPINLOCK(st_lock);
- dumper = cfs_kthread_run(libcfs_debug_dumplog_thread,
- (void*)(long)cfs_curproc_pid(),
- "libcfs_debug_dumper");
- if (IS_ERR(dumper))
- printk(CFS_KERN_ERR "LustreError: cannot start log dump thread:"
- " %ld\n", PTR_ERR(dumper));
- else
- cfs_waitq_wait(&wait, CFS_TASK_INTERRUPTIBLE);
+/* Linux v5.1-rc5 214d8ca6ee ("stacktrace: Provide common infrastructure")
+ * CONFIG_ARCH_STACKWALK indicates that save_stack_trace_tsk symbol is not
+ * exported. Use symbol_get() to find if save_stack_trace_tsk is available.
+ */
+#ifdef CONFIG_ARCH_STACKWALK
+typedef unsigned int (stack_trace_save_tsk_t)(struct task_struct *task,
+ unsigned long *store,
+ unsigned int size,
+ unsigned int skipnr);
+static stack_trace_save_tsk_t *task_dump_stack;
+#endif
+
+void __init cfs_debug_init(void)
+{
+#ifdef CONFIG_ARCH_STACKWALK
+ task_dump_stack = (void *)
+ kallsyms_lookup_name("stack_trace_save_tsk");
- /* be sure to teardown if cfs_kernel_thread() failed */
- cfs_waitq_del(&debug_ctlwq, &wait);
- cfs_set_current_state(CFS_TASK_RUNNING);
+#endif
}
-int libcfs_debug_init(unsigned long bufsize)
+static void libcfs_call_trace(struct task_struct *tsk)
+{
+ static unsigned long entries[MAX_ST_ENTRIES];
+#ifdef CONFIG_ARCH_STACKWALK
+ unsigned int nr_entries;
+
+ 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 TBD:\n");
+ if (task_dump_stack) {
+ nr_entries = task_dump_stack(tsk, entries, MAX_ST_ENTRIES, 0);
+ cfs_print_stack_trace(entries, nr_entries);
+ }
+ spin_unlock(&st_lock);
+#else
+ struct stack_trace trace;
+
+ 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);
+ cfs_print_stack_trace(trace.entries, trace.nr_entries);
+ spin_unlock(&st_lock);
+#endif
+}
+
+#else /* !CONFIG_STACKTRACE */
+
+#ifdef CONFIG_X86
+#include <linux/nmi.h>
+#include <asm/stacktrace.h>
+
+#ifdef HAVE_STACKTRACE_OPS
+static int print_trace_stack(void *data, char *name)
+{
+ printk(" <%s> ", name);
+ return 0;
+}
+
+#ifdef STACKTRACE_OPS_ADDRESS_RETURN_INT
+static int
+#else
+static void
+#endif
+print_trace_address(void *data, unsigned long addr, int reliable)
{
- int rc = 0;
- unsigned int max = libcfs_debug_mb;
+ char fmt[32];
- cfs_waitq_init(&debug_ctlwq);
+ touch_nmi_watchdog();
+ sprintf(fmt, " [<%016lx>] %s%%s\n", addr, reliable ? "" : "? ");
+ __print_symbol(fmt, addr);
+#ifdef STACKTRACE_OPS_ADDRESS_RETURN_INT
+ return 0;
+#endif
+}
+
+static const struct stacktrace_ops print_trace_ops = {
+ .stack = print_trace_stack,
+ .address = print_trace_address,
+ .walk_stack = print_context_stack,
+};
+#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, 0, &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 == current)
+ dump_stack();
+ else
+ CWARN("can't show stack: kernel doesn't export show_task\n");
+}
+
+#endif /* CONFIG_X86 */
+
+#endif /* CONFIG_STACKTRACE */
- if (libcfs_console_max_delay <= 0 || /* not set by user or */
- libcfs_console_min_delay <= 0 || /* set to invalid values */
- libcfs_console_min_delay >= libcfs_console_max_delay) {
- libcfs_console_max_delay = CDEBUG_DEFAULT_MAX_DELAY;
- libcfs_console_min_delay = CDEBUG_DEFAULT_MIN_DELAY;
- }
+void libcfs_debug_dumpstack(struct task_struct *tsk)
+{
+ libcfs_call_trace(tsk ?: current);
+}
+EXPORT_SYMBOL(libcfs_debug_dumpstack);
- if (libcfs_debug_file_path != NULL) {
- memset(libcfs_debug_file_path_arr, 0, PATH_MAX);
- strncpy(libcfs_debug_file_path_arr,
- libcfs_debug_file_path, PATH_MAX-1);
- }
+static int panic_notifier(struct notifier_block *self, unsigned long unused1,
+ void *unused2)
+{
+ if (libcfs_panic_in_progress)
+ return 0;
- /* If libcfs_debug_mb is set to an invalid value or uninitialized
- * then just make the total buffers smp_num_cpus * TCD_MAX_PAGES */
- if (max > cfs_trace_max_debug_mb() || max < cfs_num_possible_cpus()) {
- max = TCD_MAX_PAGES;
- } else {
- max = (max / cfs_num_possible_cpus());
- max = (max << (20 - CFS_PAGE_SHIFT));
- }
- rc = cfs_tracefile_init(max);
+ libcfs_panic_in_progress = 1;
+ mb();
- if (rc == 0)
- libcfs_register_panic_notifier();
+#ifdef LNET_DUMP_ON_PANIC
+ /* This is currently disabled because it spews far too much to the
+ * console on the rare cases it is ever triggered. */
- return rc;
+ if (in_interrupt()) {
+ cfs_trace_debug_print();
+ } else {
+ libcfs_debug_dumplog_internal((void *)(long)current->pid);
+ }
+#endif
+ return 0;
+}
+
+static struct notifier_block libcfs_panic_notifier = {
+ .notifier_call = panic_notifier,
+ .next = NULL,
+ .priority = 10000,
+};
+
+static void libcfs_register_panic_notifier(void)
+{
+ atomic_notifier_chain_register(&panic_notifier_list,
+ &libcfs_panic_notifier);
+}
+
+static void libcfs_unregister_panic_notifier(void)
+{
+ atomic_notifier_chain_unregister(&panic_notifier_list,
+ &libcfs_panic_notifier);
+}
+
+int libcfs_debug_init(unsigned long bufsize)
+{
+ unsigned int max = libcfs_debug_mb;
+ int rc = 0;
+
+ if (libcfs_console_max_delay <= 0 || /* not set by user or */
+ libcfs_console_min_delay <= 0 || /* set to invalid values */
+ libcfs_console_min_delay >= libcfs_console_max_delay) {
+ libcfs_console_max_delay = CDEBUG_DEFAULT_MAX_DELAY;
+ libcfs_console_min_delay = CDEBUG_DEFAULT_MIN_DELAY;
+ }
+
+ /* If libcfs_debug_mb is uninitialized then just make the
+ * total buffers smp_num_cpus * TCD_MAX_PAGES
+ */
+ if (max < num_possible_cpus()) {
+ max = TCD_MAX_PAGES;
+ } else {
+ max = (max / num_possible_cpus());
+ max <<= (20 - PAGE_SHIFT);
+ }
+
+ rc = cfs_tracefile_init(max);
+ if (rc)
+ return rc;
+
+ libcfs_register_panic_notifier();
+ kernel_param_lock(THIS_MODULE);
+ if (libcfs_debug_mb == 0)
+ libcfs_debug_mb = cfs_trace_get_debug_mb();
+ kernel_param_unlock(THIS_MODULE);
+ return rc;
}
int libcfs_debug_cleanup(void)
{
- libcfs_unregister_panic_notifier();
- cfs_tracefile_exit();
- return 0;
+ libcfs_unregister_panic_notifier();
+ kernel_param_lock(THIS_MODULE);
+ cfs_tracefile_exit();
+ kernel_param_unlock(THIS_MODULE);
+ return 0;
}
int libcfs_debug_clear_buffer(void)
{
- cfs_trace_flush_pages();
- return 0;
+ cfs_trace_flush_pages();
+ return 0;
}
-/* Debug markers, although printed by S_LNET
- * should not be be marked as such. */
+/* Debug markers, although printed by S_LNET should not be be marked as such. */
#undef DEBUG_SUBSYSTEM
#define DEBUG_SUBSYSTEM S_UNDEFINED
int libcfs_debug_mark_buffer(const char *text)
{
- CDEBUG(D_TRACE,"***************************************************\n");
- LCONSOLE(D_WARNING, "DEBUG MARKER: %s\n", text);
- CDEBUG(D_TRACE,"***************************************************\n");
+ CDEBUG(D_TRACE,
+ "**************************************************\n");
+ LCONSOLE(D_WARNING, "DEBUG MARKER: %s\n", text);
+ CDEBUG(D_TRACE,
+ "**************************************************\n");
- return 0;
+ return 0;
}
+
#undef DEBUG_SUBSYSTEM
#define DEBUG_SUBSYSTEM S_LNET
-void libcfs_debug_set_level(unsigned int debug_level)
+long libcfs_log_return(struct libcfs_debug_msg_data *msgdata, long rc)
{
- printk(CFS_KERN_WARNING "Lustre: Setting portals debug level to %08x\n",
- debug_level);
- libcfs_debug = debug_level;
+ libcfs_debug_msg(msgdata, "Process leaving (rc=%lu : %ld : %lx)\n",
+ rc, rc, rc);
+ return rc;
}
+EXPORT_SYMBOL(libcfs_log_return);
-EXPORT_SYMBOL(libcfs_debug_dumplog);
-EXPORT_SYMBOL(libcfs_debug_set_level);
+void libcfs_log_goto(struct libcfs_debug_msg_data *msgdata, const char *label,
+ long rc)
+{
+ libcfs_debug_msg(msgdata, "Process leaving via %s (rc=%lu : %ld"
+ " : %#lx)\n", label, rc, rc, rc);
+}
+EXPORT_SYMBOL(libcfs_log_goto);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff