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https://github.com/projectacrn/acrn-hypervisor.git
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8b16be9185
Many of the license and Intel copyright headers include the "All rights reserved" string. It is not relevant in the context of the BSD-3-Clause license that the code is released under. This patch removes those strings throughout the code (hypervisor, devicemodel and misc). Tracked-On: #7254 Signed-off-by: Geoffroy Van Cutsem <geoffroy.vancutsem@intel.com>
104 lines
2.0 KiB
C
104 lines
2.0 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <paths.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdbool.h>
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#include <fcntl.h>
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#include "log.h"
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#define KMSG_DEV_NODE "/dev/kmsg"
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#define KMSG_PREFIX "acrn_dm: "
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#define KMSG_MAX_LEN (MAX_ONE_LOG_SIZE + 64)
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#define DEFAULT_KMSG_LEVEL LOG_NOTICE
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static int kmsg_fd = -1;
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static uint8_t kmsg_log_level = DEFAULT_KMSG_LEVEL;
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static bool kmsg_enabled = false;
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static bool is_kmsg_enabled(void)
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{
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return kmsg_enabled;
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}
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static uint8_t get_kmsg_log_level(void)
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{
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return kmsg_log_level;
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}
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static int init_kmsg_logger(bool enable, uint8_t log_level)
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{
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kmsg_enabled = enable;
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kmsg_log_level = log_level;
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/* usually this init should be called once in DM whole life */
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if (kmsg_fd > 0)
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return kmsg_fd;
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kmsg_fd = open(KMSG_DEV_NODE, O_RDWR | O_APPEND | O_NONBLOCK);
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if (kmsg_fd < 0) {
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kmsg_enabled = false;
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pr_err(KMSG_PREFIX"open kmsg dev failed");
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}
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return kmsg_fd;
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}
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static void deinit_kmsg(void)
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{
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if (kmsg_fd > 0) {
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close(kmsg_fd);
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kmsg_fd = -1;
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kmsg_enabled = false;
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}
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}
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static void write_to_kmsg(const char *fmt, va_list args)
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{
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char *buf;
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char kmsg_buf[KMSG_MAX_LEN] = KMSG_PREFIX;
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int len, write_cnt;
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if (kmsg_fd < 0)
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return;
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len = vasprintf(&buf, fmt, args);
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if (len < 0)
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return;
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strncpy(kmsg_buf + strlen(KMSG_PREFIX), buf, KMSG_MAX_LEN - strlen(KMSG_PREFIX));
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kmsg_buf[KMSG_MAX_LEN - 1] = '\0';
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free(buf);
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write_cnt = write(kmsg_fd, kmsg_buf, strnlen(kmsg_buf, KMSG_MAX_LEN));
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if (write_cnt < 0) {
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pr_err(KMSG_PREFIX"write kmsg failed");
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close(kmsg_fd);
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kmsg_fd = -1;
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}
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}
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static struct logger_ops logger_kmsg = {
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.name = "kmsg",
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.is_enabled = is_kmsg_enabled,
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.get_log_level = get_kmsg_log_level,
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.init = init_kmsg_logger,
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.deinit = deinit_kmsg,
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.output = write_to_kmsg,
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};
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DEFINE_LOGGER_DEVICE(logger_kmsg);
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