[u-boot.git] / common / log.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Logging support
 *
 * Copyright (c) 2017 Google, Inc
 * Written by Simon Glass <[email protected]>
 */

#include <common.h>
#include <log.h>
#include <malloc.h>
#include <asm/global_data.h>
#include <dm/uclass.h>

DECLARE_GLOBAL_DATA_PTR;

static const char *const log_cat_name[] = {
	"none",
	"arch",
	"board",
	"core",
	"driver-model",
	"device-tree",
	"efi",
	"alloc",
	"sandbox",
	"bloblist",
	"devres",
	"acpi",
	"boot",
	"event",
};

_Static_assert(ARRAY_SIZE(log_cat_name) == LOGC_COUNT - LOGC_NONE,
	       "log_cat_name size");

static const char *const log_level_name[] = {
	"EMERG",
	"ALERT",
	"CRIT",
	"ERR",
	"WARNING",
	"NOTICE",
	"INFO",
	"DEBUG",
	"CONTENT",
	"IO",
};

_Static_assert(ARRAY_SIZE(log_level_name) == LOGL_COUNT, "log_level_name size");

/* All error responses MUST begin with '<' */
const char *log_get_cat_name(enum log_category_t cat)
{
	const char *name;

	if (cat < 0 || cat >= LOGC_COUNT)
		return "<invalid>";
	if (cat >= LOGC_NONE)
		return log_cat_name[cat - LOGC_NONE];

#if CONFIG_IS_ENABLED(DM)
	name = uclass_get_name((enum uclass_id)cat);
#else
	name = NULL;
#endif

	return name ? name : "<missing>";
}

enum log_category_t log_get_cat_by_name(const char *name)
{
	enum uclass_id id;
	int i;

	for (i = LOGC_NONE; i < LOGC_COUNT; i++)
		if (!strcmp(name, log_cat_name[i - LOGC_NONE]))
			return i;
	id = uclass_get_by_name(name);
	if (id != UCLASS_INVALID)
		return (enum log_category_t)id;

	return LOGC_NONE;
}

const char *log_get_level_name(enum log_level_t level)
{
	if (level >= LOGL_COUNT)
		return "INVALID";
	return log_level_name[level];
}

enum log_level_t log_get_level_by_name(const char *name)
{
	int i;

	for (i = 0; i < LOGL_COUNT; i++) {
		if (!strcasecmp(log_level_name[i], name))
			return i;
	}

	return LOGL_NONE;
}

struct log_device *log_device_find_by_name(const char *drv_name)
{
	struct log_device *ldev;

	list_for_each_entry(ldev, &gd->log_head, sibling_node) {
		if (!strcmp(drv_name, ldev->drv->name))
			return ldev;
	}

	return NULL;
}

bool log_has_cat(enum log_category_t cat_list[], enum log_category_t cat)
{
	int i;

	for (i = 0; i < LOGF_MAX_CATEGORIES && cat_list[i] != LOGC_END; i++) {
		if (cat_list[i] == cat)
			return true;
	}

	return false;
}

bool log_has_file(const char *file_list, const char *file)
{
	int file_len = strlen(file);
	const char *s, *p;
	int substr_len;

	for (s = file_list; *s; s = p + (*p != '\0')) {
		p = strchrnul(s, ',');
		substr_len = p - s;
		if (file_len >= substr_len &&
		    !strncmp(file + file_len - substr_len, s, substr_len))
			return true;
	}

	return false;
}

/**
 * log_passes_filters() - check if a log record passes the filters for a device
 *
 * @ldev: Log device to check
 * @rec: Log record to check
 * Return: true if @rec is not blocked by the filters in @ldev, false if it is
 */
static bool log_passes_filters(struct log_device *ldev, struct log_rec *rec)
{
	struct log_filter *filt;

	if (rec->flags & LOGRECF_FORCE_DEBUG)
		return true;

	/* If there are no filters, filter on the default log level */
	if (list_empty(&ldev->filter_head)) {
		if (rec->level > gd->default_log_level)
			return false;
		return true;
	}

	list_for_each_entry(filt, &ldev->filter_head, sibling_node) {
		if (filt->flags & LOGFF_LEVEL_MIN) {
			if (rec->level < filt->level)
				continue;
		} else if (rec->level > filt->level) {
			continue;
		}

		if ((filt->flags & LOGFF_HAS_CAT) &&
		    !log_has_cat(filt->cat_list, rec->cat))
			continue;

		if (filt->file_list &&
		    !log_has_file(filt->file_list, rec->file))
			continue;

		if (filt->flags & LOGFF_DENY)
			return false;
		else
			return true;
	}

	return false;
}

/**
 * log_dispatch() - Send a log record to all log devices for processing
 *
 * The log record is sent to each log device in turn, skipping those which have
 * filters which block the record.
 *
 * All log messages created while processing log record @rec are ignored.
 *
 * @rec:	log record to dispatch
 * Return:	0 msg sent, 1 msg not sent while already dispatching another msg
 */
static int log_dispatch(struct log_rec *rec, const char *fmt, va_list args)
{
	struct log_device *ldev;
	char buf[CONFIG_SYS_CBSIZE];

	/*
	 * When a log driver writes messages (e.g. via the network stack) this
	 * may result in further generated messages. We cannot process them here
	 * as this might result in infinite recursion.
	 */
	if (gd->processing_msg)
		return 1;

	/* Emit message */
	gd->processing_msg = true;
	list_for_each_entry(ldev, &gd->log_head, sibling_node) {
		if ((ldev->flags & LOGDF_ENABLE) &&
		    log_passes_filters(ldev, rec)) {
			if (!rec->msg) {
				int len;

				len = vsnprintf(buf, sizeof(buf), fmt, args);
				rec->msg = buf;
				gd->log_cont = len && buf[len - 1] != '\n';
			}
			ldev->drv->emit(ldev, rec);
		}
	}
	gd->processing_msg = false;
	return 0;
}

int _log(enum log_category_t cat, enum log_level_t level, const char *file,
	 int line, const char *func, const char *fmt, ...)
{
	struct log_rec rec;
	va_list args;

	if (!gd)
		return -ENOSYS;

	/* Check for message continuation */
	if (cat == LOGC_CONT)
		cat = gd->logc_prev;
	if (level == LOGL_CONT)
		level = gd->logl_prev;

	rec.cat = cat;
	rec.level = level & LOGL_LEVEL_MASK;
	rec.flags = 0;
	if (level & LOGL_FORCE_DEBUG)
		rec.flags |= LOGRECF_FORCE_DEBUG;
	if (gd->log_cont)
		rec.flags |= LOGRECF_CONT;
	rec.file = file;
	rec.line = line;
	rec.func = func;
	rec.msg = NULL;

	if (!(gd->flags & GD_FLG_LOG_READY)) {
		gd->log_drop_count++;

		/* display dropped traces with console puts and DEBUG_UART */
		if (rec.level <= CONFIG_LOG_DEFAULT_LEVEL ||
		    rec.flags & LOGRECF_FORCE_DEBUG) {
			char buf[CONFIG_SYS_CBSIZE];

			va_start(args, fmt);
			vsnprintf(buf, sizeof(buf), fmt, args);
			puts(buf);
			va_end(args);
		}

		return -ENOSYS;
	}
	va_start(args, fmt);
	if (!log_dispatch(&rec, fmt, args)) {
		gd->logc_prev = cat;
		gd->logl_prev = level;
	}
	va_end(args);

	return 0;
}

#define MAX_LINE_LENGTH_BYTES		64
#define DEFAULT_LINE_LENGTH_BYTES	16

int _log_buffer(enum log_category_t cat, enum log_level_t level,
		const char *file, int line, const char *func, ulong addr,
		const void *data, uint width, uint count, uint linelen)
{
	if (linelen * width > MAX_LINE_LENGTH_BYTES)
		linelen = MAX_LINE_LENGTH_BYTES / width;
	if (linelen < 1)
		linelen = DEFAULT_LINE_LENGTH_BYTES / width;

	while (count) {
		uint thislinelen;
		char buf[HEXDUMP_MAX_BUF_LENGTH(width * linelen)];

		thislinelen = hexdump_line(addr, data, width, count, linelen,
					   buf, sizeof(buf));
		assert(thislinelen >= 0);
		_log(cat, level, file, line, func, "%s\n", buf);

		/* update references */
		data += thislinelen * width;
		addr += thislinelen * width;
		count -= thislinelen;
	}

	return 0;
}

int log_add_filter_flags(const char *drv_name, enum log_category_t cat_list[],
			 enum log_level_t level, const char *file_list,
			 int flags)
{
	struct log_filter *filt;
	struct log_device *ldev;
	int ret;
	int i;

	ldev = log_device_find_by_name(drv_name);
	if (!ldev)
		return -ENOENT;
	filt = calloc(1, sizeof(*filt));
	if (!filt)
		return -ENOMEM;

	filt->flags = flags;
	if (cat_list) {
		filt->flags |= LOGFF_HAS_CAT;
		for (i = 0; ; i++) {
			if (i == ARRAY_SIZE(filt->cat_list)) {
				ret = -ENOSPC;
				goto err;
			}
			filt->cat_list[i] = cat_list[i];
			if (cat_list[i] == LOGC_END)
				break;
		}
	}
	filt->level = level;
	if (file_list) {
		filt->file_list = strdup(file_list);
		if (!filt->file_list) {
			ret = -ENOMEM;
			goto err;
		}
	}
	filt->filter_num = ldev->next_filter_num++;
	/* Add deny filters to the beginning of the list */
	if (flags & LOGFF_DENY)
		list_add(&filt->sibling_node, &ldev->filter_head);
	else
		list_add_tail(&filt->sibling_node, &ldev->filter_head);

	return filt->filter_num;

err:
	free(filt);
	return ret;
}

int log_remove_filter(const char *drv_name, int filter_num)
{
	struct log_filter *filt;
	struct log_device *ldev;

	ldev = log_device_find_by_name(drv_name);
	if (!ldev)
		return -ENOENT;

	list_for_each_entry(filt, &ldev->filter_head, sibling_node) {
		if (filt->filter_num == filter_num) {
			list_del(&filt->sibling_node);
			free(filt);

			return 0;
		}
	}

	return -ENOENT;
}

/**
 * log_find_device_by_drv() - Find a device by its driver
 *
 * @drv: Log driver
 * Return: Device associated with that driver, or NULL if not found
 */
static struct log_device *log_find_device_by_drv(struct log_driver *drv)
{
	struct log_device *ldev;

	list_for_each_entry(ldev, &gd->log_head, sibling_node) {
		if (ldev->drv == drv)
			return ldev;
	}
	/*
	 * It is quite hard to pass an invalid driver since passing an unknown
	 * LOG_GET_DRIVER(xxx) would normally produce a compilation error. But
	 * it is possible to pass NULL, for example, so this
	 */

	return NULL;
}

int log_device_set_enable(struct log_driver *drv, bool enable)
{
	struct log_device *ldev;

	ldev = log_find_device_by_drv(drv);
	if (!ldev)
		return -ENOENT;
	if (enable)
		ldev->flags |= LOGDF_ENABLE;
	else
		ldev->flags &= ~LOGDF_ENABLE;

	return 0;
}

int log_init(void)
{
	struct log_driver *drv = ll_entry_start(struct log_driver, log_driver);
	const int count = ll_entry_count(struct log_driver, log_driver);
	struct log_driver *end = drv + count;

	/*
	 * We cannot add runtime data to the driver since it is likely stored
	 * in rodata. Instead, set up a 'device' corresponding to each driver.
	 * We only support having a single device.
	 */
	INIT_LIST_HEAD((struct list_head *)&gd->log_head);
	while (drv < end) {
		struct log_device *ldev;

		ldev = calloc(1, sizeof(*ldev));
		if (!ldev) {
			debug("%s: Cannot allocate memory\n", __func__);
			return -ENOMEM;
		}
		INIT_LIST_HEAD(&ldev->filter_head);
		ldev->drv = drv;
		ldev->flags = drv->flags;
		list_add_tail(&ldev->sibling_node,
			      (struct list_head *)&gd->log_head);
		drv++;
	}
	gd->flags |= GD_FLG_LOG_READY;
	if (!gd->default_log_level)
		gd->default_log_level = CONFIG_LOG_DEFAULT_LEVEL;
	gd->log_fmt = log_get_default_format();
	gd->logc_prev = LOGC_NONE;
	gd->logl_prev = LOGL_INFO;

	return 0;
}
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
e9c8d49d SG	2	/*
	3	* Logging support
	4	*
	5	* Copyright (c) 2017 Google, Inc
	6	* Written by Simon Glass <[email protected]>
e9c8d49d SG	7	*/
	8
	9	#include <common.h>
	10	#include <log.h>
	11	#include <malloc.h>
401d1c4f	12	#include <asm/global_data.h>
f941c8d7	13	#include <dm/uclass.h>
e9c8d49d SG	14
	15	DECLARE_GLOBAL_DATA_PTR;
	16
43381401	17	static const char *const log_cat_name[] = {
f941c8d7 SG	18	"none",
	19	"arch",
	20	"board",
	21	"core",
	22	"driver-model",
	23	"device-tree",
1973b381	24	"efi",
8021296a SG	25	"alloc",
	26	"sandbox",
	27	"bloblist",
	28	"devres",
	29	"acpi",
b73d61a5	30	"boot",
87a5d1b5	31	"event",
f941c8d7 SG	32	};
f941c8d7 SG	33
2a0cbf3b HS	34	_Static_assert(ARRAY_SIZE(log_cat_name) == LOGC_COUNT - LOGC_NONE,
	35	"log_cat_name size");
	36
43381401	37	static const char *const log_level_name[] = {
f941c8d7 SG	38	"EMERG",
	39	"ALERT",
	40	"CRIT",
	41	"ERR",
	42	"WARNING",
	43	"NOTICE",
	44	"INFO",
	45	"DEBUG",
	46	"CONTENT",
	47	"IO",
	48	};
	49
2a0cbf3b HS	50	_Static_assert(ARRAY_SIZE(log_level_name) == LOGL_COUNT, "log_level_name size");
	51
	52	/* All error responses MUST begin with '<' */
f941c8d7 SG	53	const char *log_get_cat_name(enum log_category_t cat)
f941c8d7 SG	54	{
c2e4e7e6 SG	55	const char *name;
	56
	57	if (cat < 0 \|\| cat >= LOGC_COUNT)
	58	return "<invalid>";
f941c8d7 SG	59	if (cat >= LOGC_NONE)
	60	return log_cat_name[cat - LOGC_NONE];
	61
6c9e4175	62	#if CONFIG_IS_ENABLED(DM)
c2e4e7e6	63	name = uclass_get_name((enum uclass_id)cat);
6c9e4175 HS	64	#else
	65	name = NULL;
	66	#endif
c2e4e7e6 SG	67
c2e4e7e6 SG	68	return name ? name : "<missing>";
f941c8d7 SG	69	}
	70
	71	enum log_category_t log_get_cat_by_name(const char *name)
	72	{
	73	enum uclass_id id;
	74	int i;
	75
	76	for (i = LOGC_NONE; i < LOGC_COUNT; i++)
	77	if (!strcmp(name, log_cat_name[i - LOGC_NONE]))
	78	return i;
	79	id = uclass_get_by_name(name);
	80	if (id != UCLASS_INVALID)
	81	return (enum log_category_t)id;
	82
	83	return LOGC_NONE;
	84	}
	85
	86	const char *log_get_level_name(enum log_level_t level)
	87	{
	88	if (level >= LOGL_COUNT)
	89	return "INVALID";
	90	return log_level_name[level];
	91	}
	92
	93	enum log_level_t log_get_level_by_name(const char *name)
	94	{
	95	int i;
	96
	97	for (i = 0; i < LOGL_COUNT; i++) {
	98	if (!strcasecmp(log_level_name[i], name))
	99	return i;
	100	}
	101
	102	return LOGL_NONE;
	103	}
	104
3102c1d2	105	struct log_device log_device_find_by_name(const char drv_name)
e9c8d49d SG	106	{
	107	struct log_device *ldev;
	108
	109	list_for_each_entry(ldev, &gd->log_head, sibling_node) {
	110	if (!strcmp(drv_name, ldev->drv->name))
	111	return ldev;
	112	}
	113
	114	return NULL;
	115	}
	116
3102c1d2	117	bool log_has_cat(enum log_category_t cat_list[], enum log_category_t cat)
e9c8d49d SG	118	{
	119	int i;
	120
	121	for (i = 0; i < LOGF_MAX_CATEGORIES && cat_list[i] != LOGC_END; i++) {
	122	if (cat_list[i] == cat)
	123	return true;
	124	}
	125
	126	return false;
	127	}
	128
3102c1d2	129	bool log_has_file(const char file_list, const char file)
e9c8d49d SG	130	{
	131	int file_len = strlen(file);
	132	const char s, p;
	133	int substr_len;
	134
	135	for (s = file_list; s; s = p + (p != '\0')) {
	136	p = strchrnul(s, ',');
	137	substr_len = p - s;
	138	if (file_len >= substr_len &&
	139	!strncmp(file + file_len - substr_len, s, substr_len))
	140	return true;
	141	}
	142
	143	return false;
	144	}
	145
	146	/**
	147	* log_passes_filters() - check if a log record passes the filters for a device
	148	*
	149	* @ldev: Log device to check
	150	* @rec: Log record to check
185f812c	151	* Return: true if @rec is not blocked by the filters in @ldev, false if it is
e9c8d49d SG	152	*/
	153	static bool log_passes_filters(struct log_device ldev, struct log_rec rec)
	154	{
	155	struct log_filter *filt;
	156
79d5983b	157	if (rec->flags & LOGRECF_FORCE_DEBUG)
52d3df7f SG	158	return true;
52d3df7f SG	159
e9c8d49d SG	160	/* If there are no filters, filter on the default log level */
	161	if (list_empty(&ldev->filter_head)) {
	162	if (rec->level > gd->default_log_level)
	163	return false;
	164	return true;
	165	}
	166
	167	list_for_each_entry(filt, &ldev->filter_head, sibling_node) {
40455a69 SA	168	if (filt->flags & LOGFF_LEVEL_MIN) {
	169	if (rec->level < filt->level)
	170	continue;
	171	} else if (rec->level > filt->level) {
e9c8d49d	172	continue;
40455a69 SA	173	}
40455a69 SA	174
e9c8d49d SG	175	if ((filt->flags & LOGFF_HAS_CAT) &&
	176	!log_has_cat(filt->cat_list, rec->cat))
	177	continue;
40455a69	178
e9c8d49d SG	179	if (filt->file_list &&
	180	!log_has_file(filt->file_list, rec->file))
	181	continue;
fe3b1a2d SA	182
	183	if (filt->flags & LOGFF_DENY)
	184	return false;
	185	else
	186	return true;
e9c8d49d SG	187	}
	188
	189	return false;
	190	}
	191
	192	/**
	193	* log_dispatch() - Send a log record to all log devices for processing
	194	*
	195	* The log record is sent to each log device in turn, skipping those which have
d094a073	196	* filters which block the record.
e9c8d49d	197	*
d094a073 HS	198	* All log messages created while processing log record @rec are ignored.
	199	*
	200	* @rec: log record to dispatch
	201	* Return: 0 msg sent, 1 msg not sent while already dispatching another msg
e9c8d49d	202	*/
c698b998	203	static int log_dispatch(struct log_rec rec, const char fmt, va_list args)
e9c8d49d SG	204	{
e9c8d49d SG	205	struct log_device *ldev;
c698b998	206	char buf[CONFIG_SYS_CBSIZE];
e5b35f70 HS	207
	208	/*
	209	* When a log driver writes messages (e.g. via the network stack) this
	210	* may result in further generated messages. We cannot process them here
	211	* as this might result in infinite recursion.
	212	*/
993a06b6	213	if (gd->processing_msg)
d094a073	214	return 1;
e5b35f70 HS	215
e5b35f70 HS	216	/* Emit message */
993a06b6	217	gd->processing_msg = true;
e9c8d49d	218	list_for_each_entry(ldev, &gd->log_head, sibling_node) {
b4520300	219	if ((ldev->flags & LOGDF_ENABLE) &&
c698b998 PD	220	log_passes_filters(ldev, rec)) {
c698b998 PD	221	if (!rec->msg) {
9ad7a6c2 SG	222	int len;
	223
	224	len = vsnprintf(buf, sizeof(buf), fmt, args);
c698b998	225	rec->msg = buf;
9ad7a6c2	226	gd->log_cont = len && buf[len - 1] != '\n';
c698b998	227	}
e9c8d49d	228	ldev->drv->emit(ldev, rec);
c698b998	229	}
e9c8d49d	230	}
993a06b6	231	gd->processing_msg = false;
e9c8d49d SG	232	return 0;
	233	}
	234
	235	int _log(enum log_category_t cat, enum log_level_t level, const char *file,
	236	int line, const char func, const char fmt, ...)
	237	{
e9c8d49d SG	238	struct log_rec rec;
	239	va_list args;
	240
f0e90e0e PD	241	if (!gd)
	242	return -ENOSYS;
	243
d094a073 HS	244	/* Check for message continuation */
	245	if (cat == LOGC_CONT)
	246	cat = gd->logc_prev;
	247	if (level == LOGL_CONT)
	248	level = gd->logl_prev;
	249
e9c8d49d	250	rec.cat = cat;
52d3df7f	251	rec.level = level & LOGL_LEVEL_MASK;
79d5983b SG	252	rec.flags = 0;
	253	if (level & LOGL_FORCE_DEBUG)
	254	rec.flags \|= LOGRECF_FORCE_DEBUG;
9ad7a6c2 SG	255	if (gd->log_cont)
9ad7a6c2 SG	256	rec.flags \|= LOGRECF_CONT;
e9c8d49d SG	257	rec.file = file;
	258	rec.line = line;
	259	rec.func = func;
c698b998	260	rec.msg = NULL;
f0e90e0e PD	261
	262	if (!(gd->flags & GD_FLG_LOG_READY)) {
	263	gd->log_drop_count++;
dd500134 PD	264
dd500134 PD	265	/* display dropped traces with console puts and DEBUG_UART */
79d5983b SG	266	if (rec.level <= CONFIG_LOG_DEFAULT_LEVEL \|\|
79d5983b SG	267	rec.flags & LOGRECF_FORCE_DEBUG) {
c698b998 PD	268	char buf[CONFIG_SYS_CBSIZE];
c698b998 PD	269
dd500134 PD	270	va_start(args, fmt);
	271	vsnprintf(buf, sizeof(buf), fmt, args);
	272	puts(buf);
	273	va_end(args);
	274	}
	275
f0e90e0e PD	276	return -ENOSYS;
f0e90e0e PD	277	}
e9c8d49d	278	va_start(args, fmt);
c698b998	279	if (!log_dispatch(&rec, fmt, args)) {
d094a073 HS	280	gd->logc_prev = cat;
	281	gd->logl_prev = level;
	282	}
c698b998	283	va_end(args);
e9c8d49d SG	284
	285	return 0;
	286	}
	287
58b4b713 SG	288	#define MAX_LINE_LENGTH_BYTES 64
	289	#define DEFAULT_LINE_LENGTH_BYTES 16
	290
	291	int _log_buffer(enum log_category_t cat, enum log_level_t level,
	292	const char file, int line, const char func, ulong addr,
	293	const void *data, uint width, uint count, uint linelen)
	294	{
	295	if (linelen * width > MAX_LINE_LENGTH_BYTES)
	296	linelen = MAX_LINE_LENGTH_BYTES / width;
	297	if (linelen < 1)
	298	linelen = DEFAULT_LINE_LENGTH_BYTES / width;
	299
	300	while (count) {
	301	uint thislinelen;
	302	char buf[HEXDUMP_MAX_BUF_LENGTH(width * linelen)];
	303
	304	thislinelen = hexdump_line(addr, data, width, count, linelen,
	305	buf, sizeof(buf));
	306	assert(thislinelen >= 0);
	307	_log(cat, level, file, line, func, "%s\n", buf);
	308
	309	/* update references */
	310	data += thislinelen * width;
	311	addr += thislinelen * width;
	312	count -= thislinelen;
	313	}
	314
	315	return 0;
	316	}
	317
a02f84ee	318	int log_add_filter_flags(const char *drv_name, enum log_category_t cat_list[],
40455a69	319	enum log_level_t level, const char *file_list,
a02f84ee	320	int flags)
e9c8d49d SG	321	{
	322	struct log_filter *filt;
	323	struct log_device *ldev;
45fac9fc	324	int ret;
e9c8d49d SG	325	int i;
	326
	327	ldev = log_device_find_by_name(drv_name);
	328	if (!ldev)
	329	return -ENOENT;
c1f39edc	330	filt = calloc(1, sizeof(*filt));
e9c8d49d SG	331	if (!filt)
	332	return -ENOMEM;
	333
a02f84ee	334	filt->flags = flags;
e9c8d49d SG	335	if (cat_list) {
	336	filt->flags \|= LOGFF_HAS_CAT;
	337	for (i = 0; ; i++) {
45fac9fc SG	338	if (i == ARRAY_SIZE(filt->cat_list)) {
	339	ret = -ENOSPC;
	340	goto err;
	341	}
e9c8d49d SG	342	filt->cat_list[i] = cat_list[i];
	343	if (cat_list[i] == LOGC_END)
	344	break;
	345	}
	346	}
40455a69	347	filt->level = level;
e9c8d49d SG	348	if (file_list) {
e9c8d49d SG	349	filt->file_list = strdup(file_list);
45fac9fc	350	if (!filt->file_list) {
69529f98	351	ret = -ENOMEM;
45fac9fc SG	352	goto err;
45fac9fc SG	353	}
e9c8d49d SG	354	}
e9c8d49d SG	355	filt->filter_num = ldev->next_filter_num++;
fe3b1a2d SA	356	/* Add deny filters to the beginning of the list */
	357	if (flags & LOGFF_DENY)
	358	list_add(&filt->sibling_node, &ldev->filter_head);
	359	else
	360	list_add_tail(&filt->sibling_node, &ldev->filter_head);
e9c8d49d SG	361
	362	return filt->filter_num;
	363
45fac9fc	364	err:
e9c8d49d	365	free(filt);
45fac9fc	366	return ret;
e9c8d49d SG	367	}
	368
	369	int log_remove_filter(const char *drv_name, int filter_num)
	370	{
	371	struct log_filter *filt;
	372	struct log_device *ldev;
	373
	374	ldev = log_device_find_by_name(drv_name);
	375	if (!ldev)
	376	return -ENOENT;
	377
	378	list_for_each_entry(filt, &ldev->filter_head, sibling_node) {
	379	if (filt->filter_num == filter_num) {
	380	list_del(&filt->sibling_node);
	381	free(filt);
	382
	383	return 0;
	384	}
	385	}
	386
	387	return -ENOENT;
	388	}
	389
3d03ab63 SG	390	/**
	391	* log_find_device_by_drv() - Find a device by its driver
	392	*
	393	* @drv: Log driver
185f812c	394	* Return: Device associated with that driver, or NULL if not found
3d03ab63 SG	395	*/
	396	static struct log_device log_find_device_by_drv(struct log_driver drv)
	397	{
	398	struct log_device *ldev;
	399
	400	list_for_each_entry(ldev, &gd->log_head, sibling_node) {
	401	if (ldev->drv == drv)
	402	return ldev;
	403	}
	404	/*
	405	* It is quite hard to pass an invalid driver since passing an unknown
	406	* LOG_GET_DRIVER(xxx) would normally produce a compilation error. But
	407	* it is possible to pass NULL, for example, so this
	408	*/
	409
	410	return NULL;
	411	}
	412
	413	int log_device_set_enable(struct log_driver *drv, bool enable)
	414	{
	415	struct log_device *ldev;
	416
	417	ldev = log_find_device_by_drv(drv);
	418	if (!ldev)
	419	return -ENOENT;
	420	if (enable)
	421	ldev->flags \|= LOGDF_ENABLE;
	422	else
	423	ldev->flags &= ~LOGDF_ENABLE;
	424
	425	return 0;
	426	}
	427
e9c8d49d SG	428	int log_init(void)
	429	{
	430	struct log_driver *drv = ll_entry_start(struct log_driver, log_driver);
	431	const int count = ll_entry_count(struct log_driver, log_driver);
	432	struct log_driver *end = drv + count;
	433
	434	/*
	435	* We cannot add runtime data to the driver since it is likely stored
	436	* in rodata. Instead, set up a 'device' corresponding to each driver.
	437	* We only support having a single device.
	438	*/
	439	INIT_LIST_HEAD((struct list_head *)&gd->log_head);
	440	while (drv < end) {
	441	struct log_device *ldev;
	442
	443	ldev = calloc(1, sizeof(*ldev));
	444	if (!ldev) {
	445	debug("%s: Cannot allocate memory\n", __func__);
	446	return -ENOMEM;
	447	}
	448	INIT_LIST_HEAD(&ldev->filter_head);
	449	ldev->drv = drv;
b4520300	450	ldev->flags = drv->flags;
e9c8d49d SG	451	list_add_tail(&ldev->sibling_node,
	452	(struct list_head *)&gd->log_head);
	453	drv++;
	454	}
af1bc0cf	455	gd->flags \|= GD_FLG_LOG_READY;
2b1dc29a	456	if (!gd->default_log_level)
f0b05c95	457	gd->default_log_level = CONFIG_LOG_DEFAULT_LEVEL;
3c21d773	458	gd->log_fmt = log_get_default_format();
d094a073 HS	459	gd->logc_prev = LOGC_NONE;
d094a073 HS	460	gd->logl_prev = LOGL_INFO;
e9c8d49d SG	461
	462	return 0;
	463	}