+++ /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.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- */
-
-#define DEBUG_SUBSYSTEM S_LNET
-#define LUSTRE_TRACEFILE_PRIVATE
-#include <libcfs/libcfs.h>
-#include "tracefile.h"
-
-/*
- * We can't support smp tracefile currently.
- * Everything is put on one cpu.
- */
-
-#define M_TCD_MAX_PAGES (128 * 1280)
-
-static long max_permit_mb = (64 * 1024);
-
-spinlock_t trace_cpu_serializer;
-
-/*
- * thread currently executing tracefile code or NULL if none does. Used to
- * detect recursive calls to libcfs_debug_msg().
- */
-static thread_t trace_owner = NULL;
-
-extern int get_preemption_level(void);
-extern atomic_t tage_allocated;
-
-struct rw_semaphore tracefile_sem;
-
-int tracefile_init_arch() {
- init_rwsem(&tracefile_sem);
-#error "Todo: initialise per-cpu console buffers"
- return 0;
-}
-
-void tracefile_fini_arch() {
- fini_rwsem(&tracefile_sem);
-}
-
-void tracefile_read_lock() {
- down_read(&tracefile_sem);
-}
-
-void tracefile_read_unlock() {
- up_read(&tracefile_sem);
-}
-
-void tracefile_write_lock() {
- down_write(&tracefile_sem);
-}
-
-void tracefile_write_unlock() {
- up_write(&tracefile_sem);
-}
-
-char *trace_get_console_buffer(void)
-{
-#error "todo: return a per-cpu/interrupt console buffer and disable pre-emption"
-}
-
-void trace_put_console_buffer(char *buffer)
-{
-#error "todo: re-enable pre-emption"
-}
-
-struct trace_cpu_data *trace_get_tcd(void)
-{
- struct trace_cpu_data *tcd;
- int nr_pages;
- struct list_head pages;
-
- /*
- * XXX nikita: do NOT call libcfs_debug_msg() (CDEBUG/ENTRY/EXIT)
- * from here: this will lead to infinite recursion.
- */
-
- /*
- * debugging check for recursive call to libcfs_debug_msg()
- */
- if (trace_owner == current_thread()) {
- /*
- * Cannot assert here.
- */
- printk(KERN_EMERG "recursive call to %s", __FUNCTION__);
- /*
- * "The death of God left the angels in a strange position."
- */
- cfs_enter_debugger();
- }
- tcd = &trace_data[0].tcd;
- INIT_LIST_HEAD(&pages);
- if (get_preemption_level() == 0)
- nr_pages = trace_refill_stock(tcd, GFP_IOFS, &pages);
- else
- nr_pages = 0;
- spin_lock(&trace_cpu_serializer);
- trace_owner = current_thread();
- tcd->tcd_cur_stock_pages += nr_pages;
- list_splice(&pages, &tcd->tcd_stock_pages);
- return tcd;
-}
-
-extern void raw_page_death_row_clean(void);
-
-void __trace_put_tcd(struct trace_cpu_data *tcd)
-{
- /*
- * XXX nikita: do NOT call libcfs_debug_msg() (CDEBUG/ENTRY/EXIT)
- * from here: this will lead to infinite recursion.
- */
- LASSERT(trace_owner == current_thread());
- trace_owner = NULL;
- spin_unlock(&trace_cpu_serializer);
- if (get_preemption_level() == 0)
- /* purge all pending pages */
- raw_page_death_row_clean();
-}
-
-int tcd_owns_tage(struct trace_cpu_data *tcd, struct trace_page *tage)
-{
- /*
- * XXX nikita: do NOT call libcfs_debug_msg() (CDEBUG/ENTRY/EXIT)
- * from here: this will lead to infinite recursion.
- */
- /* XNU has global tcd, and all pages are owned by it */
- return 1;
-}
-
-void
-set_ptldebug_header(struct ptldebug_header *header, int subsys, int mask,
- const int line, unsigned long stack)
-{
- struct timeval tv;
-
- /*
- * XXX nikita: do NOT call libcfs_debug_msg() (CDEBUG/ENTRY/EXIT)
- * from here: this will lead to infinite recursion.
- */
- do_gettimeofday(&tv);
- header->ph_subsys = subsys;
- header->ph_mask = mask;
- header->ph_cpu_id = smp_processor_id();
- header->ph_type = 0;
- header->ph_sec = (__u32)tv.tv_sec;
- header->ph_usec = tv.tv_usec;
- header->ph_stack = stack;
- header->ph_pid = current_pid();
- header->ph_line_num = line;
- header->ph_extern_pid = (__u32)current_thread();
-}
-
-void print_to_console(struct ptldebug_header *hdr, int mask, const char *buf,
- int len, const char *file, const char *fn)
-{
- char *prefix = "Lustre", *ptype = KERN_INFO;
-
- /*
- * XXX nikita: do NOT call libcfs_debug_msg() (CDEBUG/ENTRY/EXIT)
- * from here: this will lead to infinite recursion.
- */
- if ((mask & D_EMERG) != 0) {
- prefix = "LustreError";
- ptype = KERN_EMERG;
- } else if ((mask & D_ERROR) != 0) {
- prefix = "LustreError";
- ptype = KERN_ERR;
- } else if ((mask & D_WARNING) != 0) {
- prefix = "Lustre";
- ptype = KERN_WARNING;
- } else if ((mask & libcfs_printk) != 0 || (mask & D_CONSOLE)) {
- prefix = "Lustre";
- ptype = KERN_INFO;
- }
-
- if ((mask & D_CONSOLE) != 0) {
- printk("%s%s: %.*s", ptype, prefix, len, buf);
- } else {
- printk("%s%s: %d:%d:(%s:%d:%s()) %*s",
- ptype, prefix, hdr->ph_pid, hdr->ph_extern_pid,
- file, hdr->ph_line_num, fn, len, buf);
- }
-}
-
-int trace_max_debug_mb(void)
-{
- return max_permit_mb;
-}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff