1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_LNET
38 #define LUSTRE_TRACEFILE_PRIVATE
40 #include <libcfs/libcfs.h>
41 #include "tracefile.h"
44 #define get_cpu() smp_processor_id()
45 #define put_cpu() do { } while (0)
48 /* three types of trace_data in linux */
56 /* percents to share the total debug memory for each type */
57 static unsigned int pages_factor[TCD_TYPE_MAX] = {
58 80, /* 80% pages for TCD_TYPE_PROC */
59 10, /* 10% pages for TCD_TYPE_SOFTIRQ */
60 10 /* 10% pages for TCD_TYPE_IRQ */
63 char *trace_console_buffers[NR_CPUS][3];
65 struct rw_semaphore tracefile_sem;
67 int tracefile_init_arch()
71 struct trace_cpu_data *tcd;
73 init_rwsem(&tracefile_sem);
75 /* initialize trace_data */
76 memset(trace_data, 0, sizeof(trace_data));
77 for (i = 0; i < TCD_TYPE_MAX; i++) {
78 trace_data[i]=kmalloc(sizeof(union trace_data_union)*NR_CPUS,
80 if (trace_data[i] == NULL)
85 /* arch related info initialized */
86 tcd_for_each(tcd, i, j) {
87 tcd->tcd_pages_factor = pages_factor[i];
92 for (i = 0; i < num_possible_cpus(); i++)
93 for (j = 0; j < 3; j++) {
94 trace_console_buffers[i][j] =
95 kmalloc(TRACE_CONSOLE_BUFFER_SIZE,
98 if (trace_console_buffers[i][j] == NULL)
105 tracefile_fini_arch();
106 printk(KERN_ERR "lnet: No enough memory\n");
111 void tracefile_fini_arch()
116 for (i = 0; i < num_possible_cpus(); i++)
117 for (j = 0; j < 3; j++)
118 if (trace_console_buffers[i][j] != NULL) {
119 kfree(trace_console_buffers[i][j]);
120 trace_console_buffers[i][j] = NULL;
123 for (i = 0; trace_data[i] != NULL; i++) {
124 kfree(trace_data[i]);
125 trace_data[i] = NULL;
129 void tracefile_read_lock()
131 down_read(&tracefile_sem);
134 void tracefile_read_unlock()
136 up_read(&tracefile_sem);
139 void tracefile_write_lock()
141 down_write(&tracefile_sem);
144 void tracefile_write_unlock()
146 up_write(&tracefile_sem);
150 trace_get_console_buffer(void)
157 } else if (in_softirq()) {
163 return trace_console_buffers[cpu][idx];
167 trace_put_console_buffer(char *buffer)
172 struct trace_cpu_data *
179 return &(*trace_data[TCD_TYPE_IRQ])[cpu].tcd;
180 else if (in_softirq())
181 return &(*trace_data[TCD_TYPE_SOFTIRQ])[cpu].tcd;
182 return &(*trace_data[TCD_TYPE_PROC])[cpu].tcd;
186 trace_put_tcd (struct trace_cpu_data *tcd)
191 int trace_lock_tcd(struct trace_cpu_data *tcd)
193 __LASSERT(tcd->tcd_type < TCD_TYPE_MAX);
194 if (tcd->tcd_type == TCD_TYPE_IRQ)
196 else if (tcd->tcd_type == TCD_TYPE_SOFTIRQ)
201 void trace_unlock_tcd(struct trace_cpu_data *tcd)
203 __LASSERT(tcd->tcd_type < TCD_TYPE_MAX);
204 if (tcd->tcd_type == TCD_TYPE_IRQ)
206 else if (tcd->tcd_type == TCD_TYPE_SOFTIRQ)
210 int tcd_owns_tage(struct trace_cpu_data *tcd, struct trace_page *tage)
213 * XXX nikita: do NOT call portals_debug_msg() (CDEBUG/ENTRY/EXIT)
214 * from here: this will lead to infinite recursion.
216 return tcd->tcd_cpu == tage->cpu;
220 set_ptldebug_header(struct ptldebug_header *header, int subsys, int mask,
221 const int line, unsigned long stack)
225 do_gettimeofday(&tv);
227 header->ph_subsys = subsys;
228 header->ph_mask = mask;
229 header->ph_cpu_id = smp_processor_id();
230 header->ph_sec = (__u32)tv.tv_sec;
231 header->ph_usec = tv.tv_usec;
232 header->ph_stack = stack;
233 header->ph_pid = current->pid;
234 header->ph_line_num = line;
235 #if defined(__arch_um__) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,20))
236 header->ph_extern_pid = current->thread.extern_pid;
237 #elif defined(__arch_um__) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
238 header->ph_extern_pid = current->thread.mode.tt.extern_pid;
240 header->ph_extern_pid = 0;
245 void print_to_console(struct ptldebug_header *hdr, int mask, const char *buf,
246 int len, const char *file, const char *fn)
248 char *prefix = "Lustre", *ptype = NULL;
250 if ((mask & D_EMERG) != 0) {
251 prefix = "LustreError";
253 } else if ((mask & D_ERROR) != 0) {
254 prefix = "LustreError";
256 } else if ((mask & D_WARNING) != 0) {
258 ptype = KERN_WARNING;
259 } else if ((mask & (D_CONSOLE | libcfs_printk)) != 0) {
264 if ((mask & D_CONSOLE) != 0) {
265 printk("%s%s: %.*s", ptype, prefix, len, buf);
267 printk("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix, hdr->ph_pid,
268 hdr->ph_extern_pid, file, hdr->ph_line_num, fn, len, buf);
273 int trace_max_debug_mb(void)
275 int total_mb = (num_physpages >> (20 - CFS_PAGE_SHIFT));
277 return MAX(512, (total_mb * 80)/100);
281 trace_call_on_all_cpus(void (*fn)(void *arg), void *arg)
283 cpumask_t cpus_allowed = current->cpus_allowed;
284 /* use cpus_allowed to quiet 2.4 UP kernel warning only */
285 cpumask_t m = cpus_allowed;
288 /* Run the given routine on every CPU in thread context */
289 for (cpu = 0; cpu < num_possible_cpus(); cpu++) {
290 if (!cpu_online(cpu))
295 set_cpus_allowed(current, m);
299 set_cpus_allowed(current, cpus_allowed);