/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * 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 2008 Sun Microsystems, Inc. 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 #include "tracefile.h" /* three types of trace_data in linux */ enum { TCD_TYPE_PROC = 0, TCD_TYPE_SOFTIRQ, TCD_TYPE_IRQ, TCD_TYPE_MAX }; /* percents to share the total debug memory for each type */ static unsigned int pages_factor[TCD_TYPE_MAX] = { 80, /* 80% pages for TCD_TYPE_PROC */ 10, /* 10% pages for TCD_TYPE_SOFTIRQ */ 10 /* 10% pages for TCD_TYPE_IRQ */ }; char *trace_console_buffers[NR_CPUS][3]; struct rw_semaphore tracefile_sem; int tracefile_init_arch() { int i; int j; struct trace_cpu_data *tcd; init_rwsem(&tracefile_sem); /* initialize trace_data */ memset(trace_data, 0, sizeof(trace_data)); for (i = 0; i < TCD_TYPE_MAX; i++) { trace_data[i]=kmalloc(sizeof(union trace_data_union)*NR_CPUS, GFP_KERNEL); if (trace_data[i] == NULL) goto out; } /* arch related info initialized */ tcd_for_each(tcd, i, j) { spin_lock_init(&tcd->tcd_lock); tcd->tcd_pages_factor = pages_factor[i]; tcd->tcd_type = i; tcd->tcd_cpu = j; } for (i = 0; i < num_possible_cpus(); i++) for (j = 0; j < 3; j++) { trace_console_buffers[i][j] = kmalloc(TRACE_CONSOLE_BUFFER_SIZE, GFP_KERNEL); if (trace_console_buffers[i][j] == NULL) goto out; } return 0; out: tracefile_fini_arch(); printk(KERN_ERR "lnet: No enough memory\n"); return -ENOMEM; } void tracefile_fini_arch() { int i; int j; for (i = 0; i < num_possible_cpus(); i++) for (j = 0; j < 3; j++) if (trace_console_buffers[i][j] != NULL) { kfree(trace_console_buffers[i][j]); trace_console_buffers[i][j] = NULL; } for (i = 0; trace_data[i] != NULL; i++) { kfree(trace_data[i]); trace_data[i] = NULL; } 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) { int cpu = cfs_get_cpu(); int idx; if (in_irq()) { idx = 0; } else if (in_softirq()) { idx = 1; } else { idx = 2; } return trace_console_buffers[cpu][idx]; } void trace_put_console_buffer(char *buffer) { cfs_put_cpu(); } struct trace_cpu_data * trace_get_tcd(void) { struct trace_cpu_data *tcd; int cpu; cpu = cfs_get_cpu(); if (in_irq()) tcd = &(*trace_data[TCD_TYPE_IRQ])[cpu].tcd; else if (in_softirq()) tcd = &(*trace_data[TCD_TYPE_SOFTIRQ])[cpu].tcd; else tcd = &(*trace_data[TCD_TYPE_PROC])[cpu].tcd; trace_lock_tcd(tcd); return tcd; } void trace_put_tcd (struct trace_cpu_data *tcd) { trace_unlock_tcd(tcd); cfs_put_cpu(); } int trace_lock_tcd(struct trace_cpu_data *tcd) { __LASSERT(tcd->tcd_type < TCD_TYPE_MAX); spin_lock_irqsave(&tcd->tcd_lock, tcd->tcd_lock_flags); return 1; } void trace_unlock_tcd(struct trace_cpu_data *tcd) { __LASSERT(tcd->tcd_type < TCD_TYPE_MAX); spin_unlock_irqrestore(&tcd->tcd_lock, tcd->tcd_lock_flags); } int tcd_owns_tage(struct trace_cpu_data *tcd, struct trace_page *tage) { /* * XXX nikita: do NOT call portals_debug_msg() (CDEBUG/ENTRY/EXIT) * from here: this will lead to infinite recursion. */ return tcd->tcd_cpu == tage->cpu; } void set_ptldebug_header(struct ptldebug_header *header, int subsys, int mask, const int line, unsigned long stack) { struct timeval tv; do_gettimeofday(&tv); header->ph_subsys = subsys; header->ph_mask = mask; header->ph_cpu_id = smp_processor_id(); 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; #if defined(__arch_um__) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,20)) header->ph_extern_pid = current->thread.extern_pid; #elif defined(__arch_um__) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)) header->ph_extern_pid = current->thread.mode.tt.extern_pid; #else header->ph_extern_pid = 0; #endif return; } 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 = NULL; 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 & (D_CONSOLE | libcfs_printk)) != 0) { 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); } return; } int trace_max_debug_mb(void) { int total_mb = (num_physpages >> (20 - CFS_PAGE_SHIFT)); return MAX(512, (total_mb * 80)/100); }