Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 1 | /* |
| 2 | * GPL HEADER START |
| 3 | * |
| 4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 5 | * |
| 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. |
| 9 | * |
| 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). |
| 15 | * |
| 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 |
| 19 | * |
| 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 |
| 22 | * have any questions. |
| 23 | * |
| 24 | * GPL HEADER END |
| 25 | */ |
| 26 | /* |
| 27 | * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. |
| 28 | * Use is subject to license terms. |
| 29 | * |
| 30 | * Copyright (c) 2012, Intel Corporation. |
| 31 | */ |
| 32 | /* |
| 33 | * This file is part of Lustre, http://www.lustre.org/ |
| 34 | * Lustre is a trademark of Sun Microsystems, Inc. |
| 35 | */ |
| 36 | |
| 37 | #define DEBUG_SUBSYSTEM S_LNET |
| 38 | #define LUSTRE_TRACEFILE_PRIVATE |
| 39 | |
Greg Kroah-Hartman | 9fdaf8c | 2014-07-11 20:51:16 -0700 | [diff] [blame] | 40 | #include "../../../include/linux/libcfs/libcfs.h" |
Greg Kroah-Hartman | da0e6a7 | 2014-07-11 21:00:57 -0700 | [diff] [blame] | 41 | #include "../tracefile.h" |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 42 | |
| 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 */ |
| 48 | }; |
| 49 | |
| 50 | char *cfs_trace_console_buffers[NR_CPUS][CFS_TCD_TYPE_MAX]; |
| 51 | |
James Simmons | 2f4246f | 2015-06-03 18:38:06 -0400 | [diff] [blame] | 52 | static DECLARE_RWSEM(cfs_tracefile_sem); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 53 | |
Emil Goode | 7d46a21 | 2013-07-28 00:38:55 +0200 | [diff] [blame] | 54 | int cfs_tracefile_init_arch(void) |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 55 | { |
| 56 | int i; |
| 57 | int j; |
| 58 | struct cfs_trace_cpu_data *tcd; |
| 59 | |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 60 | /* initialize trace_data */ |
| 61 | memset(cfs_trace_data, 0, sizeof(cfs_trace_data)); |
| 62 | for (i = 0; i < CFS_TCD_TYPE_MAX; i++) { |
| 63 | cfs_trace_data[i] = |
| 64 | kmalloc(sizeof(union cfs_trace_data_union) * |
| 65 | num_possible_cpus(), GFP_KERNEL); |
Oleg Drokin | 15d9f52 | 2016-02-16 00:46:44 -0500 | [diff] [blame] | 66 | if (!cfs_trace_data[i]) |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 67 | goto out; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 68 | } |
| 69 | |
| 70 | /* arch related info initialized */ |
| 71 | cfs_tcd_for_each(tcd, i, j) { |
| 72 | spin_lock_init(&tcd->tcd_lock); |
| 73 | tcd->tcd_pages_factor = pages_factor[i]; |
| 74 | tcd->tcd_type = i; |
| 75 | tcd->tcd_cpu = j; |
| 76 | } |
| 77 | |
| 78 | for (i = 0; i < num_possible_cpus(); i++) |
| 79 | for (j = 0; j < 3; j++) { |
| 80 | cfs_trace_console_buffers[i][j] = |
| 81 | kmalloc(CFS_TRACE_CONSOLE_BUFFER_SIZE, |
| 82 | GFP_KERNEL); |
| 83 | |
Oleg Drokin | 15d9f52 | 2016-02-16 00:46:44 -0500 | [diff] [blame] | 84 | if (!cfs_trace_console_buffers[i][j]) |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 85 | goto out; |
| 86 | } |
| 87 | |
| 88 | return 0; |
| 89 | |
| 90 | out: |
| 91 | cfs_tracefile_fini_arch(); |
| 92 | printk(KERN_ERR "lnet: Not enough memory\n"); |
| 93 | return -ENOMEM; |
| 94 | } |
| 95 | |
Emil Goode | 7d46a21 | 2013-07-28 00:38:55 +0200 | [diff] [blame] | 96 | void cfs_tracefile_fini_arch(void) |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 97 | { |
| 98 | int i; |
| 99 | int j; |
| 100 | |
| 101 | for (i = 0; i < num_possible_cpus(); i++) |
Julia Lawall | acd3750 | 2015-05-01 21:38:03 +0200 | [diff] [blame] | 102 | for (j = 0; j < 3; j++) { |
| 103 | kfree(cfs_trace_console_buffers[i][j]); |
| 104 | cfs_trace_console_buffers[i][j] = NULL; |
| 105 | } |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 106 | |
Oleg Drokin | 15d9f52 | 2016-02-16 00:46:44 -0500 | [diff] [blame] | 107 | for (i = 0; cfs_trace_data[i]; i++) { |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 108 | kfree(cfs_trace_data[i]); |
| 109 | cfs_trace_data[i] = NULL; |
| 110 | } |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 111 | } |
| 112 | |
Emil Goode | 7d46a21 | 2013-07-28 00:38:55 +0200 | [diff] [blame] | 113 | void cfs_tracefile_read_lock(void) |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 114 | { |
| 115 | down_read(&cfs_tracefile_sem); |
| 116 | } |
| 117 | |
Emil Goode | 7d46a21 | 2013-07-28 00:38:55 +0200 | [diff] [blame] | 118 | void cfs_tracefile_read_unlock(void) |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 119 | { |
| 120 | up_read(&cfs_tracefile_sem); |
| 121 | } |
| 122 | |
Emil Goode | 7d46a21 | 2013-07-28 00:38:55 +0200 | [diff] [blame] | 123 | void cfs_tracefile_write_lock(void) |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 124 | { |
| 125 | down_write(&cfs_tracefile_sem); |
| 126 | } |
| 127 | |
Emil Goode | 7d46a21 | 2013-07-28 00:38:55 +0200 | [diff] [blame] | 128 | void cfs_tracefile_write_unlock(void) |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 129 | { |
| 130 | up_write(&cfs_tracefile_sem); |
| 131 | } |
| 132 | |
Oleg Drokin | 4a44ab6 | 2016-02-16 00:47:12 -0500 | [diff] [blame] | 133 | enum cfs_trace_buf_type cfs_trace_buf_idx_get(void) |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 134 | { |
| 135 | if (in_irq()) |
| 136 | return CFS_TCD_TYPE_IRQ; |
Janani Ravichandran | 7d51a7d | 2016-02-18 16:52:45 -0500 | [diff] [blame] | 137 | if (in_softirq()) |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 138 | return CFS_TCD_TYPE_SOFTIRQ; |
Janani Ravichandran | 7d51a7d | 2016-02-18 16:52:45 -0500 | [diff] [blame] | 139 | return CFS_TCD_TYPE_PROC; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 140 | } |
| 141 | |
| 142 | /* |
| 143 | * The walking argument indicates the locking comes from all tcd types |
| 144 | * iterator and we must lock it and dissable local irqs to avoid deadlocks |
| 145 | * with other interrupt locks that might be happening. See LU-1311 |
| 146 | * for details. |
| 147 | */ |
| 148 | int cfs_trace_lock_tcd(struct cfs_trace_cpu_data *tcd, int walking) |
Loic Pefferkorn | f8bd34d | 2015-01-20 20:39:11 +0100 | [diff] [blame] | 149 | __acquires(&tcd->tc_lock) |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 150 | { |
| 151 | __LASSERT(tcd->tcd_type < CFS_TCD_TYPE_MAX); |
| 152 | if (tcd->tcd_type == CFS_TCD_TYPE_IRQ) |
| 153 | spin_lock_irqsave(&tcd->tcd_lock, tcd->tcd_lock_flags); |
| 154 | else if (tcd->tcd_type == CFS_TCD_TYPE_SOFTIRQ) |
| 155 | spin_lock_bh(&tcd->tcd_lock); |
| 156 | else if (unlikely(walking)) |
| 157 | spin_lock_irq(&tcd->tcd_lock); |
| 158 | else |
| 159 | spin_lock(&tcd->tcd_lock); |
| 160 | return 1; |
| 161 | } |
| 162 | |
| 163 | void cfs_trace_unlock_tcd(struct cfs_trace_cpu_data *tcd, int walking) |
Loic Pefferkorn | f8bd34d | 2015-01-20 20:39:11 +0100 | [diff] [blame] | 164 | __releases(&tcd->tcd_lock) |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 165 | { |
| 166 | __LASSERT(tcd->tcd_type < CFS_TCD_TYPE_MAX); |
| 167 | if (tcd->tcd_type == CFS_TCD_TYPE_IRQ) |
| 168 | spin_unlock_irqrestore(&tcd->tcd_lock, tcd->tcd_lock_flags); |
| 169 | else if (tcd->tcd_type == CFS_TCD_TYPE_SOFTIRQ) |
| 170 | spin_unlock_bh(&tcd->tcd_lock); |
| 171 | else if (unlikely(walking)) |
| 172 | spin_unlock_irq(&tcd->tcd_lock); |
| 173 | else |
| 174 | spin_unlock(&tcd->tcd_lock); |
| 175 | } |
| 176 | |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 177 | void |
| 178 | cfs_set_ptldebug_header(struct ptldebug_header *header, |
| 179 | struct libcfs_debug_msg_data *msgdata, |
| 180 | unsigned long stack) |
| 181 | { |
Arnd Bergmann | 65f2884 | 2015-09-27 16:45:04 -0400 | [diff] [blame] | 182 | struct timespec64 ts; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 183 | |
Arnd Bergmann | 65f2884 | 2015-09-27 16:45:04 -0400 | [diff] [blame] | 184 | ktime_get_real_ts64(&ts); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 185 | |
| 186 | header->ph_subsys = msgdata->msg_subsys; |
| 187 | header->ph_mask = msgdata->msg_mask; |
| 188 | header->ph_cpu_id = smp_processor_id(); |
| 189 | header->ph_type = cfs_trace_buf_idx_get(); |
Arnd Bergmann | 65f2884 | 2015-09-27 16:45:04 -0400 | [diff] [blame] | 190 | /* y2038 safe since all user space treats this as unsigned, but |
Oleg Drokin | a3fbcb3c | 2016-02-16 00:47:08 -0500 | [diff] [blame] | 191 | * will overflow in 2106 |
| 192 | */ |
Arnd Bergmann | 65f2884 | 2015-09-27 16:45:04 -0400 | [diff] [blame] | 193 | header->ph_sec = (u32)ts.tv_sec; |
| 194 | header->ph_usec = ts.tv_nsec / NSEC_PER_USEC; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 195 | header->ph_stack = stack; |
| 196 | header->ph_pid = current->pid; |
| 197 | header->ph_line_num = msgdata->msg_line; |
| 198 | header->ph_extern_pid = 0; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 199 | } |
| 200 | |
| 201 | static char * |
| 202 | dbghdr_to_err_string(struct ptldebug_header *hdr) |
| 203 | { |
| 204 | switch (hdr->ph_subsys) { |
Mike Rapoport | a05b986 | 2015-09-12 19:20:02 +0300 | [diff] [blame] | 205 | case S_LND: |
| 206 | case S_LNET: |
| 207 | return "LNetError"; |
| 208 | default: |
| 209 | return "LustreError"; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 210 | } |
| 211 | } |
| 212 | |
| 213 | static char * |
| 214 | dbghdr_to_info_string(struct ptldebug_header *hdr) |
| 215 | { |
| 216 | switch (hdr->ph_subsys) { |
Mike Rapoport | a05b986 | 2015-09-12 19:20:02 +0300 | [diff] [blame] | 217 | case S_LND: |
| 218 | case S_LNET: |
| 219 | return "LNet"; |
| 220 | default: |
| 221 | return "Lustre"; |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 222 | } |
| 223 | } |
| 224 | |
| 225 | void cfs_print_to_console(struct ptldebug_header *hdr, int mask, |
| 226 | const char *buf, int len, const char *file, |
| 227 | const char *fn) |
| 228 | { |
| 229 | char *prefix = "Lustre", *ptype = NULL; |
| 230 | |
| 231 | if ((mask & D_EMERG) != 0) { |
| 232 | prefix = dbghdr_to_err_string(hdr); |
| 233 | ptype = KERN_EMERG; |
| 234 | } else if ((mask & D_ERROR) != 0) { |
| 235 | prefix = dbghdr_to_err_string(hdr); |
| 236 | ptype = KERN_ERR; |
| 237 | } else if ((mask & D_WARNING) != 0) { |
| 238 | prefix = dbghdr_to_info_string(hdr); |
| 239 | ptype = KERN_WARNING; |
| 240 | } else if ((mask & (D_CONSOLE | libcfs_printk)) != 0) { |
| 241 | prefix = dbghdr_to_info_string(hdr); |
| 242 | ptype = KERN_INFO; |
| 243 | } |
| 244 | |
| 245 | if ((mask & D_CONSOLE) != 0) { |
| 246 | printk("%s%s: %.*s", ptype, prefix, len, buf); |
| 247 | } else { |
| 248 | printk("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix, |
| 249 | hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num, |
| 250 | fn, len, buf); |
| 251 | } |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | int cfs_trace_max_debug_mb(void) |
| 255 | { |
Peng Tao | 4f6cc9a | 2013-07-15 22:27:04 +0800 | [diff] [blame] | 256 | int total_mb = (totalram_pages >> (20 - PAGE_SHIFT)); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 257 | |
Oleg Drokin | 60b156e | 2016-02-16 00:47:02 -0500 | [diff] [blame] | 258 | return max(512, (total_mb * 80) / 100); |
Peng Tao | d7e09d0 | 2013-05-02 16:46:55 +0800 | [diff] [blame] | 259 | } |