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 (c) 2008, 2010, Oracle and/or its affiliates. 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"
43 /* percents to share the total debug memory for each type */
44 static unsigned int pages_factor[CFS_TCD_TYPE_MAX] = {
45 80, /* 80% pages for CFS_TCD_TYPE_PROC */
46 10, /* 10% pages for CFS_TCD_TYPE_SOFTIRQ */
47 10 /* 10% pages for CFS_TCD_TYPE_IRQ */
50 char *cfs_trace_console_buffers[NR_CPUS][CFS_TCD_TYPE_MAX];
52 cfs_rw_semaphore_t cfs_tracefile_sem;
54 int cfs_tracefile_init_arch()
58 struct cfs_trace_cpu_data *tcd;
60 cfs_init_rwsem(&cfs_tracefile_sem);
62 /* initialize trace_data */
63 memset(cfs_trace_data, 0, sizeof(cfs_trace_data));
64 for (i = 0; i < CFS_TCD_TYPE_MAX; i++) {
66 kmalloc(sizeof(union cfs_trace_data_union) * NR_CPUS,
68 if (cfs_trace_data[i] == NULL)
73 /* arch related info initialized */
74 cfs_tcd_for_each(tcd, i, j) {
75 cfs_spin_lock_init(&tcd->tcd_lock);
76 tcd->tcd_pages_factor = pages_factor[i];
81 for (i = 0; i < num_possible_cpus(); i++)
82 for (j = 0; j < 3; j++) {
83 cfs_trace_console_buffers[i][j] =
84 kmalloc(CFS_TRACE_CONSOLE_BUFFER_SIZE,
87 if (cfs_trace_console_buffers[i][j] == NULL)
94 cfs_tracefile_fini_arch();
95 printk(KERN_ERR "lnet: Not enough memory\n");
100 void cfs_tracefile_fini_arch()
105 for (i = 0; i < num_possible_cpus(); i++)
106 for (j = 0; j < 3; j++)
107 if (cfs_trace_console_buffers[i][j] != NULL) {
108 kfree(cfs_trace_console_buffers[i][j]);
109 cfs_trace_console_buffers[i][j] = NULL;
112 for (i = 0; cfs_trace_data[i] != NULL; i++) {
113 kfree(cfs_trace_data[i]);
114 cfs_trace_data[i] = NULL;
117 cfs_fini_rwsem(&cfs_tracefile_sem);
120 void cfs_tracefile_read_lock()
122 cfs_down_read(&cfs_tracefile_sem);
125 void cfs_tracefile_read_unlock()
127 cfs_up_read(&cfs_tracefile_sem);
130 void cfs_tracefile_write_lock()
132 cfs_down_write(&cfs_tracefile_sem);
135 void cfs_tracefile_write_unlock()
137 cfs_up_write(&cfs_tracefile_sem);
140 cfs_trace_buf_type_t cfs_trace_buf_idx_get()
143 return CFS_TCD_TYPE_IRQ;
144 else if (in_softirq())
145 return CFS_TCD_TYPE_SOFTIRQ;
147 return CFS_TCD_TYPE_PROC;
150 int cfs_trace_lock_tcd(struct cfs_trace_cpu_data *tcd)
152 __LASSERT(tcd->tcd_type < CFS_TCD_TYPE_MAX);
153 if (tcd->tcd_type == CFS_TCD_TYPE_IRQ)
154 cfs_spin_lock_irqsave(&tcd->tcd_lock, tcd->tcd_lock_flags);
155 else if (tcd->tcd_type == CFS_TCD_TYPE_SOFTIRQ)
156 cfs_spin_lock_bh(&tcd->tcd_lock);
158 cfs_spin_lock(&tcd->tcd_lock);
162 void cfs_trace_unlock_tcd(struct cfs_trace_cpu_data *tcd)
164 __LASSERT(tcd->tcd_type < CFS_TCD_TYPE_MAX);
165 if (tcd->tcd_type == CFS_TCD_TYPE_IRQ)
166 cfs_spin_unlock_irqrestore(&tcd->tcd_lock, tcd->tcd_lock_flags);
167 else if (tcd->tcd_type == CFS_TCD_TYPE_SOFTIRQ)
168 cfs_spin_unlock_bh(&tcd->tcd_lock);
170 cfs_spin_unlock(&tcd->tcd_lock);
173 int cfs_tcd_owns_tage(struct cfs_trace_cpu_data *tcd,
174 struct cfs_trace_page *tage)
177 * XXX nikita: do NOT call portals_debug_msg() (CDEBUG/ENTRY/EXIT)
178 * from here: this will lead to infinite recursion.
180 return tcd->tcd_cpu == tage->cpu;
184 cfs_set_ptldebug_header(struct ptldebug_header *header, int subsys, int mask,
185 const int line, unsigned long stack)
189 do_gettimeofday(&tv);
191 header->ph_subsys = subsys;
192 header->ph_mask = mask;
193 header->ph_cpu_id = cfs_smp_processor_id();
194 header->ph_type = cfs_trace_buf_idx_get();
195 header->ph_sec = (__u32)tv.tv_sec;
196 header->ph_usec = tv.tv_usec;
197 header->ph_stack = stack;
198 header->ph_pid = current->pid;
199 header->ph_line_num = line;
200 header->ph_extern_pid = 0;
204 void cfs_print_to_console(struct ptldebug_header *hdr, int mask,
205 const char *buf, int len, const char *file,
208 char *prefix = "Lustre", *ptype = NULL;
210 if ((mask & D_EMERG) != 0) {
211 prefix = "LustreError";
213 } else if ((mask & D_ERROR) != 0) {
214 prefix = "LustreError";
216 } else if ((mask & D_WARNING) != 0) {
218 ptype = KERN_WARNING;
219 } else if ((mask & (D_CONSOLE | libcfs_printk)) != 0) {
224 if ((mask & D_CONSOLE) != 0) {
225 printk("%s%s: %.*s", ptype, prefix, len, buf);
227 printk("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix,
228 hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
234 int cfs_trace_max_debug_mb(void)
236 int total_mb = (cfs_num_physpages >> (20 - PAGE_SHIFT));
238 return MAX(512, (total_mb * 80)/100);