Git Repo - u-boot.git/blame_incremental

... / ...

Commit	Line	Data
	1	// SPDX-License-Identifier: GPL-2.0+
	2	/*
	3	* Log to syslog.
	4	*
	5	* Copyright (c) 2020, Heinrich Schuchardt <[email protected]>
	6	*/
	7
	8	#include <log.h>
	9	#include <net.h>
	10	#include <asm/global_data.h>
	11
	12	DECLARE_GLOBAL_DATA_PTR;
	13
	14	#define BUFFER_SIZE 480
	15
	16	static void append(char *buf, char buf_end, const char *fmt, ...)
	17	{
	18	va_list args;
	19	size_t size = buf_end - *buf;
	20
	21	va_start(args, fmt);
	22	vsnprintf(*buf, size, fmt, args);
	23	va_end(args);
	24	buf += strlen(buf);
	25	}
	26
	27	static int log_syslog_emit(struct log_device ldev, struct log_rec rec)
	28	{
	29	int ret;
	30	int fmt = gd->log_fmt;
	31	char msg[BUFFER_SIZE];
	32	char *msg_end = msg + BUFFER_SIZE;
	33	char *ptr = msg;
	34	char *iphdr;
	35	char *log_msg;
	36	int eth_hdr_size;
	37	struct in_addr bcast_ip;
	38	unsigned int log_level;
	39	char *log_hostname;
	40
	41	/* Setup packet buffers */
	42	ret = net_init();
	43	if (ret)
	44	return ret;
	45	/* Disable hardware and put it into the reset state */
	46	eth_halt();
	47	/* Set current device according to environment variables */
	48	eth_set_current();
	49	/* Get hardware ready for send and receive operations */
	50	ret = eth_init();
	51	if (ret < 0) {
	52	eth_halt();
	53	goto out;
	54	}
	55
	56	memset(msg, 0, BUFFER_SIZE);
	57
	58	/* Set ethernet header */
	59	eth_hdr_size = net_set_ether((uchar *)ptr, net_bcast_ethaddr, PROT_IP);
	60	ptr += eth_hdr_size;
	61	iphdr = ptr;
	62	ptr += IP_UDP_HDR_SIZE;
	63	log_msg = ptr;
	64
	65	/*
	66	* The syslog log levels defined in RFC 5424 match the U-Boot ones up to
	67	* level 7 (debug).
	68	*/
	69	log_level = rec->level;
	70	if (log_level > 7)
	71	log_level = 7;
	72	/* Leave high bits as 0 to write a 'kernel message' */
	73
	74	/* Write log message to buffer */
	75	append(&ptr, msg_end, "<%u>", log_level);
	76	log_hostname = env_get("log_hostname");
	77	if (log_hostname)
	78	append(&ptr, msg_end, "%s ", log_hostname);
	79	append(&ptr, msg_end, "uboot: ");
	80	if (fmt & BIT(LOGF_LEVEL))
	81	append(&ptr, msg_end, "%s.",
	82	log_get_level_name(rec->level));
	83	if (fmt & BIT(LOGF_CAT))
	84	append(&ptr, msg_end, "%s,",
	85	log_get_cat_name(rec->cat));
	86	if (fmt & BIT(LOGF_FILE))
	87	append(&ptr, msg_end, "%s:", rec->file);
	88	if (fmt & BIT(LOGF_LINE))
	89	append(&ptr, msg_end, "%d-", rec->line);
	90	if (fmt & BIT(LOGF_FUNC))
	91	append(&ptr, msg_end, "%s()", rec->func);
	92	if (fmt & BIT(LOGF_MSG))
	93	append(&ptr, msg_end, "%s%s",
	94	fmt != BIT(LOGF_MSG) ? " " : "", rec->msg);
	95	/* Consider trailing 0x00 */
	96	ptr++;
	97
	98	debug("log message: '%s'\n", log_msg);
	99
	100	/* Broadcast message */
	101	bcast_ip.s_addr = 0xFFFFFFFFL;
	102	net_set_udp_header((uchar *)iphdr, bcast_ip, 514, 514, ptr - log_msg);
	103	net_send_packet((uchar *)msg, ptr - msg);
	104
	105	out:
	106	return ret;
	107	}
	108
	109	LOG_DRIVER(syslog) = {
	110	.name = "syslog",
	111	.emit = log_syslog_emit,
	112	};