340 lines
9.5 KiB
C
340 lines
9.5 KiB
C
/*
|
|
* Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
|
|
* Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without modification,
|
|
* are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this list of
|
|
* conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
|
|
* of conditions and the following disclaimer in the documentation and/or other materials
|
|
* provided with the distribution.
|
|
*
|
|
* 3. Neither the name of the copyright holder nor the names of its contributors may be used
|
|
* to endorse or promote products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
|
|
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
|
|
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
|
|
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "los_hilog.h"
|
|
#include "los_init.h"
|
|
#include "los_mp.h"
|
|
#include "los_mux.h"
|
|
#include "los_process_pri.h"
|
|
#include "los_task_pri.h"
|
|
#include "fs/file.h"
|
|
#include "fs/driver.h"
|
|
#include "los_vm_map.h"
|
|
#include "los_vm_lock.h"
|
|
#include "user_copy.h"
|
|
|
|
#define HILOG_BUFFER 4096
|
|
#define DRIVER_MODE 0666
|
|
#define HILOG_DRIVER "/dev/hilog"
|
|
|
|
struct HiLogEntry {
|
|
unsigned int len;
|
|
unsigned int hdrSize;
|
|
unsigned int pid : 16;
|
|
unsigned int taskId : 16;
|
|
unsigned int sec;
|
|
unsigned int nsec;
|
|
unsigned int reserved;
|
|
char msg[0];
|
|
};
|
|
|
|
ssize_t HilogRead(struct file *filep, char __user *buf, size_t count);
|
|
ssize_t HilogWrite(struct file *filep, const char __user *buf, size_t count);
|
|
int HiLogOpen(struct file *filep);
|
|
int HiLogClose(struct file *filep);
|
|
|
|
static ssize_t HiLogWrite(struct file *filep, const char *buffer, size_t bufLen);
|
|
static ssize_t HiLogRead(struct file *filep, char *buffer, size_t bufLen);
|
|
|
|
STATIC struct file_operations_vfs g_hilogFops = {
|
|
HiLogOpen, /* open */
|
|
HiLogClose, /* close */
|
|
HiLogRead, /* read */
|
|
HiLogWrite, /* write */
|
|
NULL, /* seek */
|
|
NULL, /* ioctl */
|
|
NULL, /* mmap */
|
|
#ifndef CONFIG_DISABLE_POLL
|
|
NULL, /* poll */
|
|
#endif
|
|
NULL, /* unlink */
|
|
};
|
|
|
|
struct HiLogCharDevice {
|
|
int flag;
|
|
LosMux mtx;
|
|
unsigned char *buffer;
|
|
wait_queue_head_t wq;
|
|
size_t writeOffset;
|
|
size_t headOffset;
|
|
size_t size;
|
|
size_t count;
|
|
} g_hiLogDev;
|
|
|
|
static inline unsigned char *HiLogBufferHead(void)
|
|
{
|
|
return g_hiLogDev.buffer + g_hiLogDev.headOffset;
|
|
}
|
|
|
|
int HiLogOpen(struct file *filep)
|
|
{
|
|
(void)filep;
|
|
return 0;
|
|
}
|
|
|
|
int HiLogClose(struct file *filep)
|
|
{
|
|
(void)filep;
|
|
return 0;
|
|
}
|
|
|
|
static void HiLogBufferInc(size_t sz)
|
|
{
|
|
if (g_hiLogDev.size + sz <= HILOG_BUFFER) {
|
|
g_hiLogDev.size += sz;
|
|
g_hiLogDev.writeOffset += sz;
|
|
g_hiLogDev.writeOffset %= HILOG_BUFFER;
|
|
g_hiLogDev.count++;
|
|
}
|
|
}
|
|
|
|
static void HiLogBufferDec(size_t sz)
|
|
{
|
|
if (g_hiLogDev.size >= sz) {
|
|
g_hiLogDev.size -= sz;
|
|
g_hiLogDev.headOffset += sz;
|
|
g_hiLogDev.headOffset %= HILOG_BUFFER;
|
|
g_hiLogDev.count--;
|
|
}
|
|
}
|
|
|
|
static int HiLogBufferCopy(unsigned char *dst, unsigned dstLen, unsigned char *src, size_t srcLen)
|
|
{
|
|
int retval = -1;
|
|
size_t minLen = (dstLen > srcLen) ? srcLen : dstLen;
|
|
|
|
if (LOS_IsUserAddressRange((VADDR_T)(UINTPTR)dst, minLen) &&
|
|
LOS_IsUserAddressRange((VADDR_T)(UINTPTR)src, minLen)) {
|
|
return retval;
|
|
}
|
|
|
|
if (LOS_IsUserAddressRange((VADDR_T)(UINTPTR)dst, minLen)) {
|
|
retval = LOS_ArchCopyToUser(dst, src, minLen);
|
|
} else if (LOS_IsUserAddressRange((VADDR_T)(UINTPTR)src, minLen)) {
|
|
retval = LOS_ArchCopyFromUser(dst, src, minLen);
|
|
} else {
|
|
retval = memcpy_s(dst, dstLen, src, srcLen);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
static int HiLogReadRingBuffer(unsigned char *buffer, size_t bufLen)
|
|
{
|
|
size_t retval;
|
|
size_t bufLeft = HILOG_BUFFER - g_hiLogDev.headOffset;
|
|
if (bufLeft > bufLen) {
|
|
retval = HiLogBufferCopy(buffer, bufLen, HiLogBufferHead(), bufLen);
|
|
} else {
|
|
retval = HiLogBufferCopy(buffer, bufLen, HiLogBufferHead(), bufLeft);
|
|
if (retval < 0) {
|
|
return retval;
|
|
}
|
|
|
|
retval = HiLogBufferCopy(buffer + bufLeft, bufLen - bufLeft, g_hiLogDev.buffer, bufLen - bufLeft);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
static ssize_t HiLogRead(struct file *filep, char *buffer, size_t bufLen)
|
|
{
|
|
size_t retval;
|
|
struct HiLogEntry header;
|
|
|
|
(void)filep;
|
|
wait_event_interruptible(g_hiLogDev.wq, (g_hiLogDev.size > 0));
|
|
|
|
(VOID)LOS_MuxAcquire(&g_hiLogDev.mtx);
|
|
retval = HiLogReadRingBuffer((unsigned char *)&header, sizeof(header));
|
|
if (retval < 0) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (bufLen < header.len + sizeof(header)) {
|
|
dprintf("buffer too small,bufLen=%d, header.len=%d,%d\n", bufLen, header.len, header.hdrSize);
|
|
retval = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
HiLogBufferDec(sizeof(header));
|
|
|
|
retval = HiLogBufferCopy((unsigned char *)buffer, bufLen, (unsigned char *)&header, sizeof(header));
|
|
if (retval < 0) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
retval = HiLogReadRingBuffer((unsigned char *)(buffer + sizeof(header)), header.len);
|
|
if (retval < 0) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
HiLogBufferDec(header.len);
|
|
retval = header.len + sizeof(header);
|
|
out:
|
|
(VOID)LOS_MuxRelease(&g_hiLogDev.mtx);
|
|
return retval;
|
|
}
|
|
|
|
static int HiLogWriteRingBuffer(unsigned char *buffer, size_t bufLen)
|
|
{
|
|
int retval;
|
|
size_t bufLeft = HILOG_BUFFER - g_hiLogDev.writeOffset;
|
|
if (bufLen > bufLeft) {
|
|
retval = HiLogBufferCopy(g_hiLogDev.buffer + g_hiLogDev.writeOffset, bufLeft, buffer, bufLeft);
|
|
if (retval) {
|
|
return -1;
|
|
}
|
|
retval = HiLogBufferCopy(g_hiLogDev.buffer, HILOG_BUFFER, buffer + bufLeft, bufLen - bufLeft);
|
|
} else {
|
|
retval = HiLogBufferCopy(g_hiLogDev.buffer + g_hiLogDev.writeOffset, bufLeft, buffer, bufLen);
|
|
}
|
|
if (retval < 0) {
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void HiLogHeadInit(struct HiLogEntry *header, size_t len)
|
|
{
|
|
struct timespec now;
|
|
int ret;
|
|
|
|
ret = clock_gettime(CLOCK_REALTIME, &now);
|
|
if (ret != 0) {
|
|
dprintf("In %s line %d,clock_gettime fail", __FUNCTION__, __LINE__);
|
|
return;
|
|
}
|
|
|
|
header->len = len;
|
|
header->pid = LOS_GetCurrProcessID();
|
|
header->taskId = LOS_CurTaskIDGet();
|
|
header->sec = now.tv_sec;
|
|
header->nsec = now.tv_nsec;
|
|
header->hdrSize = sizeof(struct HiLogEntry);
|
|
}
|
|
|
|
static void HiLogCoverOldLog(size_t bufLen)
|
|
{
|
|
int retval;
|
|
struct HiLogEntry header;
|
|
size_t totalSize = bufLen + sizeof(struct HiLogEntry);
|
|
|
|
while (totalSize + g_hiLogDev.size > HILOG_BUFFER) {
|
|
retval = HiLogReadRingBuffer((unsigned char *)&header, sizeof(header));
|
|
if (retval < 0) {
|
|
break;
|
|
}
|
|
|
|
HiLogBufferDec(sizeof(header));
|
|
HiLogBufferDec(header.len);
|
|
}
|
|
}
|
|
|
|
int HiLogWriteInternal(const char *buffer, size_t bufLen)
|
|
{
|
|
struct HiLogEntry header;
|
|
int retval;
|
|
LosTaskCB *runTask = (LosTaskCB *)OsCurrTaskGet();
|
|
|
|
if ((g_hiLogDev.buffer == NULL) || (OS_INT_ACTIVE) || (runTask->taskStatus & OS_TASK_FLAG_SYSTEM_TASK)) {
|
|
PRINTK("%s\n", buffer);
|
|
return -EAGAIN;
|
|
}
|
|
|
|
(VOID)LOS_MuxAcquire(&g_hiLogDev.mtx);
|
|
HiLogCoverOldLog(bufLen);
|
|
HiLogHeadInit(&header, bufLen);
|
|
|
|
retval = HiLogWriteRingBuffer((unsigned char *)&header, sizeof(header));
|
|
if (retval) {
|
|
retval = -ENODATA;
|
|
goto out;
|
|
}
|
|
HiLogBufferInc(sizeof(header));
|
|
|
|
retval = HiLogWriteRingBuffer((unsigned char *)(buffer), header.len);
|
|
if (retval) {
|
|
retval = -ENODATA;
|
|
goto out;
|
|
}
|
|
|
|
HiLogBufferInc(header.len);
|
|
|
|
retval = header.len;
|
|
|
|
out:
|
|
(VOID)LOS_MuxRelease(&g_hiLogDev.mtx);
|
|
if (retval > 0) {
|
|
wake_up_interruptible(&g_hiLogDev.wq);
|
|
}
|
|
if (retval < 0) {
|
|
dprintf("write fail retval=%d\n", retval);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
static ssize_t HiLogWrite(struct file *filep, const char *buffer, size_t bufLen)
|
|
{
|
|
(void)filep;
|
|
if (bufLen + sizeof(struct HiLogEntry) > HILOG_BUFFER) {
|
|
dprintf("input too large\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return HiLogWriteInternal(buffer, bufLen);
|
|
}
|
|
|
|
static void HiLogDeviceInit(void)
|
|
{
|
|
g_hiLogDev.buffer = LOS_MemAlloc((VOID *)OS_SYS_MEM_ADDR, HILOG_BUFFER);
|
|
if (g_hiLogDev.buffer == NULL) {
|
|
dprintf("In %s line %d,LOS_MemAlloc fail", __FUNCTION__, __LINE__);
|
|
}
|
|
|
|
init_waitqueue_head(&g_hiLogDev.wq);
|
|
LOS_MuxInit(&g_hiLogDev.mtx, NULL);
|
|
|
|
g_hiLogDev.writeOffset = 0;
|
|
g_hiLogDev.headOffset = 0;
|
|
g_hiLogDev.size = 0;
|
|
g_hiLogDev.count = 0;
|
|
}
|
|
|
|
int OsHiLogDriverInit(VOID)
|
|
{
|
|
HiLogDeviceInit();
|
|
return register_driver(HILOG_DRIVER, &g_hilogFops, DRIVER_MODE, NULL);
|
|
}
|
|
|
|
LOS_MODULE_INIT(OsHiLogDriverInit, LOS_INIT_LEVEL_KMOD_EXTENDED);
|