#include <linux/ctype.h>
#include <linux/kthread.h>
+#include <linux/stacktrace.h>
+#include <linux/utsname.h>
#include <libcfs/libcfs.h>
#include "tracefile.h"
0xffffffff);
}
+char lnet_debug_log_upcall[1024] = "/usr/lib/lustre/lnet_debug_log_upcall";
+
+/* Upcall function once a Lustre log has been dumped.
+ *
+ * @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, "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 /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()
*/
}
EXPORT_SYMBOL(libcfs_debug_dumplog);
+/* 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 */
+ }
+
+ 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
+
+#define MAX_ST_ENTRIES 100
+static DEFINE_SPINLOCK(st_lock);
+
+/* 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
+
+static void libcfs_call_trace(struct task_struct *tsk)
+{
+#ifdef CONFIG_ARCH_STACKWALK
+ static unsigned long entries[MAX_ST_ENTRIES];
+ unsigned int i, nr_entries;
+
+ if (!task_dump_stack)
+ task_dump_stack = (stack_trace_save_tsk_t *)
+ symbol_get("stack_trace_save_tsk");
+
+ 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);
+ for (i = 0; i < nr_entries; i++)
+ pr_info("[<0>] %pB\n", (void *)entries[i]);
+ }
+ spin_unlock(&st_lock);
+#else
+ 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);
+#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)
+{
+ char fmt[32];
+
+ 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 */
+
+void libcfs_debug_dumpstack(struct task_struct *tsk)
+{
+ libcfs_call_trace(tsk ?: current);
+}
+EXPORT_SYMBOL(libcfs_debug_dumpstack);
+
+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,
+};
+
+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)
{
int rc = 0;
git://git.whamcloud.com / fs / lustre-release.git / blobdiff