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/*********************************************************
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* Copyright (C) 2007 VMware, Inc. All rights reserved.
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 and no later version.
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*********************************************************/
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* Common logging functions for Linux kernel modules.
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#include "driver-config.h"
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#include "compat_kernel.h"
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#include "compat_sched.h"
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#include <asm/current.h>
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#include "driverLog.h"
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#define LINUXLOG_BUFFER_SIZE 1024
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static const char *driverLogPrefix = "";
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* vsnprintf was born in 2.4.10. Fall back on vsprintf if we're
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 4, 10)
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# define vsnprintf(str, size, fmt, args) vsprintf(str, fmt, args)
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*----------------------------------------------------------------------------
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* Initializes the Linux logging.
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*----------------------------------------------------------------------------
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DriverLog_Init(const char *prefix) // IN
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driverLogPrefix = prefix ? prefix : "";
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*----------------------------------------------------------------------
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* Log error message from a Linux module.
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*----------------------------------------------------------------------
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DriverLogPrint(const char *level, // IN: KERN_* constant
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const char *fmt, // IN: error format string
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va_list args) // IN: arguments for format string
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static char staticBuf[LINUXLOG_BUFFER_SIZE];
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* By default, use a small buffer on the stack (thread safe). If it is too
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* small, fall back to a larger static buffer (not thread safe).
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if (vsnprintf(stackBuf, sizeof stackBuf, fmt, args2) < sizeof stackBuf) {
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vsnprintf(staticBuf, sizeof staticBuf, fmt, args);
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printk("%s%s[%d]: %s", level, driverLogPrefix, current->pid, buf);
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*----------------------------------------------------------------------
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* Warning messages from kernel module: logged into kernel log
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*----------------------------------------------------------------------
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Warning(const char *fmt, ...) // IN: warning format string
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DriverLogPrint(KERN_WARNING, fmt, args);
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*----------------------------------------------------------------------
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* Log messages from kernel module: logged into kernel log
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* as debug information.
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*----------------------------------------------------------------------
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Log(const char *fmt, ...) // IN: log format string
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* Use the kernel log with at least a KERN_DEBUG level
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* so it doesn't garbage the screen at (re)boot time on RedHat 6.0.
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DriverLogPrint(KERN_DEBUG, fmt, args);
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*----------------------------------------------------------------------
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* ASSERTION failures and Panics from kernel module get here.
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* Message is logged to the kernel log and on console.
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*----------------------------------------------------------------------
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Panic(const char *fmt, ...) // IN: panic format string
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DriverLogPrint(KERN_EMERG, fmt, args);
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/* Should die with %cs unwritable, or at least with page fault. */
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asm volatile("movb $0, %cs:(0)");
added
removed
modules/linux/vsock/linux/driverLog.c
