4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2012, Intel Corporation.
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 90, /* 90% pages for CFS_TCD_TYPE_PASSIVE */
46 10 /* 10% pages for CFS_TCD_TYPE_DISPATCH */
49 char *cfs_trace_console_buffers[NR_CPUS][CFS_TCD_TYPE_MAX];
51 struct rw_semaphore cfs_tracefile_sem;
53 int cfs_tracefile_init_arch()
57 struct cfs_trace_cpu_data *tcd;
59 init_rwsem(&cfs_tracefile_sem);
61 /* initialize trace_data */
62 memset(cfs_trace_data, 0, sizeof(cfs_trace_data));
63 for (i = 0; i < CFS_TCD_TYPE_MAX; i++) {
65 kmalloc(sizeof(union cfs_trace_data_union) * \
67 if (cfs_trace_data[i] == NULL)
71 /* arch related info initialized */
72 cfs_tcd_for_each(tcd, i, j) {
73 tcd->tcd_pages_factor = (USHORT) pages_factor[i];
74 tcd->tcd_type = (USHORT) i;
75 tcd->tcd_cpu = (USHORT)j;
78 for (i = 0; i < num_possible_cpus(); i++)
79 for (j = 0; j < CFS_TCD_TYPE_MAX; j++) {
80 cfs_trace_console_buffers[i][j] =
81 kmalloc(CFS_TRACE_CONSOLE_BUFFER_SIZE,
84 if (cfs_trace_console_buffers[i][j] == NULL)
91 cfs_tracefile_fini_arch();
92 printk(KERN_ERR "lnet: Not enough memory\n");
97 void cfs_tracefile_fini_arch()
102 for (i = 0; i < num_possible_cpus(); i++) {
103 for (j = 0; j < CFS_TCD_TYPE_MAX; j++) {
104 if (cfs_trace_console_buffers[i][j] != NULL) {
105 kfree(cfs_trace_console_buffers[i][j]);
106 cfs_trace_console_buffers[i][j] = NULL;
111 for (i = 0; cfs_trace_data[i] != NULL; i++) {
112 kfree(cfs_trace_data[i]);
113 cfs_trace_data[i] = NULL;
116 fini_rwsem(&cfs_tracefile_sem);
119 void cfs_tracefile_read_lock()
121 down_read(&cfs_tracefile_sem);
124 void cfs_tracefile_read_unlock()
126 up_read(&cfs_tracefile_sem);
129 void cfs_tracefile_write_lock()
131 down_write(&cfs_tracefile_sem);
134 void cfs_tracefile_write_unlock()
136 up_write(&cfs_tracefile_sem);
139 cfs_trace_buf_type_t cfs_trace_buf_idx_get()
141 if (KeGetCurrentIrql() >= DISPATCH_LEVEL)
142 return CFS_TCD_TYPE_DISPATCH;
144 return CFS_TCD_TYPE_PASSIVE;
147 int cfs_trace_lock_tcd(struct cfs_trace_cpu_data *tcd, int walking)
149 __LASSERT(tcd->tcd_type < CFS_TCD_TYPE_MAX);
153 void cfs_trace_unlock_tcd(struct cfs_trace_cpu_data *tcd, int walking)
155 __LASSERT(tcd->tcd_type < CFS_TCD_TYPE_MAX);
158 int cfs_tcd_owns_tage(struct cfs_trace_cpu_data *tcd,
159 struct cfs_trace_page *tage)
162 * XXX nikita: do NOT call portals_debug_msg() (CDEBUG/ENTRY/EXIT)
163 * from here: this will lead to infinite recursion.
165 return tcd->tcd_cpu == tage->cpu;
169 cfs_set_ptldebug_header(struct ptldebug_header *header, int subsys, int mask,
170 const int line, unsigned long stack)
174 do_gettimeofday(&tv);
176 header->ph_subsys = subsys;
177 header->ph_mask = mask;
178 header->ph_cpu_id = smp_processor_id();
179 header->ph_type = cfs_trace_buf_idx_get();
180 header->ph_sec = (__u32)tv.tv_sec;
181 header->ph_usec = tv.tv_usec;
182 header->ph_stack = stack;
183 header->ph_pid = (__u32)(ULONG_PTR)current->pid;
184 header->ph_line_num = line;
185 header->ph_extern_pid = 0;
189 void cfs_print_to_console(struct ptldebug_header *hdr, int mask,
190 const char *buf, int len, const char *file,
193 char *prefix = "Lustre", *ptype = NULL;
195 if ((mask & D_EMERG) != 0) {
196 prefix = "LustreError";
198 } else if ((mask & D_ERROR) != 0) {
199 prefix = "LustreError";
201 } else if ((mask & D_WARNING) != 0) {
203 ptype = KERN_WARNING;
204 } else if ((mask & (D_CONSOLE | libcfs_printk)) != 0) {
209 if ((mask & D_CONSOLE) != 0) {
210 printk("%s%s: %.*s", ptype, prefix, len, buf);
212 printk("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix, hdr->ph_pid,
213 hdr->ph_extern_pid, file, hdr->ph_line_num, fn, len, buf);
218 int cfs_trace_max_debug_mb(void)
220 int total_mb = (num_physpages >> (20 - PAGE_CACHE_SHIFT));
222 return MAX(512, (total_mb * 80)/100);