+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
- * Copyright (C) 2002 Cluster File Systems, Inc.
- * Author: Phil Schwan <phil@clusterfs.com>
- *
- * This file is part of Lustre, http://www.lustre.org.
- *
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
- *
- * Lustre 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 for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
-
-#include <linux/config.h>
-#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/smp_lock.h>
-#include <linux/unistd.h>
-#include <linux/interrupt.h>
-#include <asm/system.h>
-#include <asm/uaccess.h>
-#include <linux/completion.h>
-
-#include <linux/fs.h>
-#include <linux/stat.h>
-#include <asm/uaccess.h>
-#include <asm/segment.h>
-#include <linux/miscdevice.h>
-#include <linux/version.h>
-
-# define DEBUG_SUBSYSTEM S_PORTALS
-
-#include <linux/kp30.h>
-#include <linux/portals_compat25.h>
-#include <linux/libcfs.h>
-
-#include "tracefile.h"
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
-#include <linux/kallsyms.h>
-#endif
-
-unsigned int portal_subsystem_debug = ~0 - (S_PORTALS | S_NAL);
-EXPORT_SYMBOL(portal_subsystem_debug);
-
-unsigned int portal_debug = (D_WARNING | D_DLMTRACE | D_ERROR | D_EMERG | D_HA |
- D_RPCTRACE | D_VFSTRACE);
-EXPORT_SYMBOL(portal_debug);
-
-unsigned int portal_printk;
-EXPORT_SYMBOL(portal_printk);
-
-unsigned int portal_stack;
-EXPORT_SYMBOL(portal_stack);
-
-#ifdef __KERNEL__
-atomic_t portal_kmemory = ATOMIC_INIT(0);
-EXPORT_SYMBOL(portal_kmemory);
-#endif
-
-static DECLARE_WAIT_QUEUE_HEAD(debug_ctlwq);
-
-char debug_file_path[1024] = "/tmp/lustre-log";
-static char debug_file_name[1024];
-static int handled_panic; /* to avoid recursive calls to notifiers */
-char portals_upcall[1024] = "/usr/lib/lustre/portals_upcall";
-
-void portals_debug_dumplog_internal(void *arg)
-{
- void *journal_info = current->journal_info;
- current->journal_info = NULL;
-
- snprintf(debug_file_name, sizeof(debug_file_path) - 1,
- "%s.%ld.%ld", debug_file_path, CURRENT_SECONDS, (long)arg);
- printk(KERN_ALERT "LustreError: dumping log to %s\n", debug_file_name);
- tracefile_dump_all_pages(debug_file_name);
-
- current->journal_info = journal_info;
-}
-
-int portals_debug_dumplog_thread(void *arg)
-{
- kportal_daemonize("");
- reparent_to_init();
- portals_debug_dumplog_internal(arg);
- wake_up(&debug_ctlwq);
- return 0;
-}
-
-void portals_debug_dumplog(void)
-{
- int rc;
- DECLARE_WAITQUEUE(wait, current);
- ENTRY;
-
- /* 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() */
- set_current_state(TASK_INTERRUPTIBLE);
- add_wait_queue(&debug_ctlwq, &wait);
-
- rc = kernel_thread(portals_debug_dumplog_thread,
- (void *)(long)current->pid,
- CLONE_VM | CLONE_FS | CLONE_FILES);
- if (rc < 0)
- printk(KERN_ERR "LustreError: cannot start log dump thread: "
- "%d\n", rc);
- else
- schedule();
-
- /* be sure to teardown if kernel_thread() failed */
- remove_wait_queue(&debug_ctlwq, &wait);
- set_current_state(TASK_RUNNING);
-}
-
-static int panic_dumplog(struct notifier_block *self, unsigned long unused1,
- void *unused2)
-{
- if (handled_panic)
- return 0;
- else
- handled_panic = 1;
-
- if (in_interrupt()) {
- trace_debug_print();
- return 0;
- }
-
- while (current->lock_depth >= 0)
- unlock_kernel();
- portals_debug_dumplog();
- return 0;
-}
-
-static struct notifier_block lustre_panic_notifier = {
- notifier_call : panic_dumplog,
- next : NULL,
- priority : 10000
-};
-
-int portals_debug_init(unsigned long bufsize)
-{
- notifier_chain_register(&panic_notifier_list, &lustre_panic_notifier);
- return tracefile_init();
-}
-
-int portals_debug_cleanup(void)
-{
- tracefile_exit();
- notifier_chain_unregister(&panic_notifier_list, &lustre_panic_notifier);
- return 0;
-}
-
-int portals_debug_clear_buffer(void)
-{
- trace_flush_pages();
- return 0;
-}
-
-/* Debug markers, although printed by S_PORTALS
- * should not be be marked as such. */
-#undef DEBUG_SUBSYSTEM
-#define DEBUG_SUBSYSTEM S_UNDEFINED
-int portals_debug_mark_buffer(char *text)
-{
- CDEBUG(D_TRACE,"***************************************************\n");
- CDEBUG(D_WARNING, "DEBUG MARKER: %s\n", text);
- CDEBUG(D_TRACE,"***************************************************\n");
-
- return 0;
-}
-#undef DEBUG_SUBSYSTEM
-#define DEBUG_SUBSYSTEM S_PORTALS
-
-void portals_debug_set_level(unsigned int debug_level)
-{
- printk(KERN_WARNING "Lustre: Setting portals debug level to %08x\n",
- debug_level);
- portal_debug = debug_level;
-}
-
-void portals_run_upcall(char **argv)
-{
- int rc;
- int argc;
- char *envp[] = {
- "HOME=/",
- "PATH=/sbin:/bin:/usr/sbin:/usr/bin",
- NULL};
- ENTRY;
-
- argv[0] = portals_upcall;
- argc = 1;
- while (argv[argc] != NULL)
- argc++;
-
- LASSERT(argc >= 2);
-
- rc = USERMODEHELPER(argv[0], argv, envp);
- if (rc < 0) {
- CERROR("Error %d invoking portals upcall %s %s%s%s%s%s%s%s%s; "
- "check /proc/sys/portals/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 {
- CERROR("Invoked portals 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 portals_run_lbug_upcall(char *file, const char *fn, const int line)
-{
- char *argv[6];
- char buf[32];
-
- ENTRY;
- snprintf (buf, sizeof buf, "%d", line);
-
- argv[1] = "LBUG";
- argv[2] = file;
- argv[3] = (char *)fn;
- argv[4] = buf;
- argv[5] = NULL;
-
- portals_run_upcall (argv);
-}
-
-char *portals_nid2str(int nal, ptl_nid_t nid, char *str)
-{
- if (nid == PTL_NID_ANY) {
- snprintf(str, PTL_NALFMT_SIZE, "%s", "PTL_NID_ANY");
- return str;
- }
-
- switch(nal){
-/* XXX this could be a nal method of some sort, 'cept it's config
- * dependent whether (say) socknal NIDs are actually IP addresses... */
-#if !CRAY_PORTALS
- case TCPNAL:
- /* userspace NAL */
- case IIBNAL:
- case OPENIBNAL:
- case RANAL:
- case SOCKNAL:
- snprintf(str, PTL_NALFMT_SIZE, "%u:%u.%u.%u.%u",
- (__u32)(nid >> 32), HIPQUAD(nid));
- break;
- case QSWNAL:
- case GMNAL:
- case LONAL:
- snprintf(str, PTL_NALFMT_SIZE, "%u:%u",
- (__u32)(nid >> 32), (__u32)nid);
- break;
-#endif
- default:
- snprintf(str, PTL_NALFMT_SIZE, "?%x? %llx",
- nal, (long long)nid);
- break;
- }
- return str;
-}
-
-char *portals_id2str(int nal, ptl_process_id_t id, char *str)
-{
- int len;
-
- portals_nid2str(nal, id.nid, str);
- len = strlen(str);
- snprintf(str + len, PTL_NALFMT_SIZE - len, "-%u", id.pid);
- return str;
-}
-
-#ifdef __KERNEL__
-
-void portals_debug_dumpstack(struct task_struct *tsk)
-{
-#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 *);
-
- if (tsk == NULL)
- tsk = current;
- CWARN("showing stack for process %d\n", tsk->pid);
- show_task(tsk);
-#else
- CWARN("can't show stack: kernel doesn't export show_task\n");
-#endif
-}
-
-struct task_struct *portals_current(void)
-{
- CWARN("current task struct is %p\n", current);
- return current;
-}
-
-EXPORT_SYMBOL(portals_debug_dumpstack);
-EXPORT_SYMBOL(portals_current);
-#endif /* __KERNEL__ */
-
-EXPORT_SYMBOL(portals_debug_dumplog);
-EXPORT_SYMBOL(portals_debug_set_level);
-EXPORT_SYMBOL(portals_run_upcall);
-EXPORT_SYMBOL(portals_run_lbug_upcall);
-EXPORT_SYMBOL(portals_nid2str);
-EXPORT_SYMBOL(portals_id2str);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff