[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 <display_options.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",
	"fs",
	"expo",
};

_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 for each driver.
	 */
	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>
4e4bf944	10	#include <display_options.h>
e9c8d49d SG	11	#include <log.h>
e9c8d49d SG	12	#include <malloc.h>
401d1c4f	13	#include <asm/global_data.h>
f941c8d7	14	#include <dm/uclass.h>
e9c8d49d SG	15
	16	DECLARE_GLOBAL_DATA_PTR;
	17
43381401	18	static const char *const log_cat_name[] = {
f941c8d7 SG	19	"none",
	20	"arch",
	21	"board",
	22	"core",
	23	"driver-model",
	24	"device-tree",
1973b381	25	"efi",
8021296a SG	26	"alloc",
	27	"sandbox",
	28	"bloblist",
	29	"devres",
	30	"acpi",
b73d61a5	31	"boot",
87a5d1b5	32	"event",
4f6daaca	33	"fs",
c98cb512	34	"expo",
f941c8d7 SG	35	};
f941c8d7 SG	36
2a0cbf3b HS	37	_Static_assert(ARRAY_SIZE(log_cat_name) == LOGC_COUNT - LOGC_NONE,
	38	"log_cat_name size");
	39
43381401	40	static const char *const log_level_name[] = {
f941c8d7 SG	41	"EMERG",
	42	"ALERT",
	43	"CRIT",
	44	"ERR",
	45	"WARNING",
	46	"NOTICE",
	47	"INFO",
	48	"DEBUG",
	49	"CONTENT",
	50	"IO",
	51	};
	52
2a0cbf3b HS	53	_Static_assert(ARRAY_SIZE(log_level_name) == LOGL_COUNT, "log_level_name size");
	54
	55	/* All error responses MUST begin with '<' */
f941c8d7 SG	56	const char *log_get_cat_name(enum log_category_t cat)
f941c8d7 SG	57	{
c2e4e7e6 SG	58	const char *name;
	59
	60	if (cat < 0 \|\| cat >= LOGC_COUNT)
	61	return "<invalid>";
f941c8d7 SG	62	if (cat >= LOGC_NONE)
	63	return log_cat_name[cat - LOGC_NONE];
	64
6c9e4175	65	#if CONFIG_IS_ENABLED(DM)
c2e4e7e6	66	name = uclass_get_name((enum uclass_id)cat);
6c9e4175 HS	67	#else
	68	name = NULL;
	69	#endif
c2e4e7e6 SG	70
c2e4e7e6 SG	71	return name ? name : "<missing>";
f941c8d7 SG	72	}
	73
	74	enum log_category_t log_get_cat_by_name(const char *name)
	75	{
	76	enum uclass_id id;
	77	int i;
	78
	79	for (i = LOGC_NONE; i < LOGC_COUNT; i++)
	80	if (!strcmp(name, log_cat_name[i - LOGC_NONE]))
	81	return i;
	82	id = uclass_get_by_name(name);
	83	if (id != UCLASS_INVALID)
	84	return (enum log_category_t)id;
	85
	86	return LOGC_NONE;
	87	}
	88
	89	const char *log_get_level_name(enum log_level_t level)
	90	{
	91	if (level >= LOGL_COUNT)
	92	return "INVALID";
	93	return log_level_name[level];
	94	}
	95
	96	enum log_level_t log_get_level_by_name(const char *name)
	97	{
	98	int i;
	99
	100	for (i = 0; i < LOGL_COUNT; i++) {
	101	if (!strcasecmp(log_level_name[i], name))
	102	return i;
	103	}
	104
	105	return LOGL_NONE;
	106	}
	107
3102c1d2	108	struct log_device log_device_find_by_name(const char drv_name)
e9c8d49d SG	109	{
	110	struct log_device *ldev;
	111
	112	list_for_each_entry(ldev, &gd->log_head, sibling_node) {
	113	if (!strcmp(drv_name, ldev->drv->name))
	114	return ldev;
	115	}
	116
	117	return NULL;
	118	}
	119
3102c1d2	120	bool log_has_cat(enum log_category_t cat_list[], enum log_category_t cat)
e9c8d49d SG	121	{
	122	int i;
	123
	124	for (i = 0; i < LOGF_MAX_CATEGORIES && cat_list[i] != LOGC_END; i++) {
	125	if (cat_list[i] == cat)
	126	return true;
	127	}
	128
	129	return false;
	130	}
	131
3102c1d2	132	bool log_has_file(const char file_list, const char file)
e9c8d49d SG	133	{
	134	int file_len = strlen(file);
	135	const char s, p;
	136	int substr_len;
	137
	138	for (s = file_list; s; s = p + (p != '\0')) {
	139	p = strchrnul(s, ',');
	140	substr_len = p - s;
	141	if (file_len >= substr_len &&
	142	!strncmp(file + file_len - substr_len, s, substr_len))
	143	return true;
	144	}
	145
	146	return false;
	147	}
	148
	149	/**
	150	* log_passes_filters() - check if a log record passes the filters for a device
	151	*
	152	* @ldev: Log device to check
	153	* @rec: Log record to check
185f812c	154	* Return: true if @rec is not blocked by the filters in @ldev, false if it is
e9c8d49d SG	155	*/
	156	static bool log_passes_filters(struct log_device ldev, struct log_rec rec)
	157	{
	158	struct log_filter *filt;
	159
79d5983b	160	if (rec->flags & LOGRECF_FORCE_DEBUG)
52d3df7f SG	161	return true;
52d3df7f SG	162
e9c8d49d SG	163	/* If there are no filters, filter on the default log level */
	164	if (list_empty(&ldev->filter_head)) {
	165	if (rec->level > gd->default_log_level)
	166	return false;
	167	return true;
	168	}
	169
	170	list_for_each_entry(filt, &ldev->filter_head, sibling_node) {
40455a69 SA	171	if (filt->flags & LOGFF_LEVEL_MIN) {
	172	if (rec->level < filt->level)
	173	continue;
	174	} else if (rec->level > filt->level) {
e9c8d49d	175	continue;
40455a69 SA	176	}
40455a69 SA	177
e9c8d49d SG	178	if ((filt->flags & LOGFF_HAS_CAT) &&
	179	!log_has_cat(filt->cat_list, rec->cat))
	180	continue;
40455a69	181
e9c8d49d SG	182	if (filt->file_list &&
	183	!log_has_file(filt->file_list, rec->file))
	184	continue;
fe3b1a2d SA	185
	186	if (filt->flags & LOGFF_DENY)
	187	return false;
	188	else
	189	return true;
e9c8d49d SG	190	}
	191
	192	return false;
	193	}
	194
	195	/**
	196	* log_dispatch() - Send a log record to all log devices for processing
	197	*
	198	* The log record is sent to each log device in turn, skipping those which have
d094a073	199	* filters which block the record.
e9c8d49d	200	*
d094a073 HS	201	* All log messages created while processing log record @rec are ignored.
	202	*
	203	* @rec: log record to dispatch
	204	* Return: 0 msg sent, 1 msg not sent while already dispatching another msg
e9c8d49d	205	*/
c698b998	206	static int log_dispatch(struct log_rec rec, const char fmt, va_list args)
e9c8d49d SG	207	{
e9c8d49d SG	208	struct log_device *ldev;
c698b998	209	char buf[CONFIG_SYS_CBSIZE];
e5b35f70 HS	210
	211	/*
	212	* When a log driver writes messages (e.g. via the network stack) this
	213	* may result in further generated messages. We cannot process them here
	214	* as this might result in infinite recursion.
	215	*/
993a06b6	216	if (gd->processing_msg)
d094a073	217	return 1;
e5b35f70 HS	218
e5b35f70 HS	219	/* Emit message */
993a06b6	220	gd->processing_msg = true;
e9c8d49d	221	list_for_each_entry(ldev, &gd->log_head, sibling_node) {
b4520300	222	if ((ldev->flags & LOGDF_ENABLE) &&
c698b998 PD	223	log_passes_filters(ldev, rec)) {
c698b998 PD	224	if (!rec->msg) {
9ad7a6c2 SG	225	int len;
	226
	227	len = vsnprintf(buf, sizeof(buf), fmt, args);
c698b998	228	rec->msg = buf;
9ad7a6c2	229	gd->log_cont = len && buf[len - 1] != '\n';
c698b998	230	}
e9c8d49d	231	ldev->drv->emit(ldev, rec);
c698b998	232	}
e9c8d49d	233	}
993a06b6	234	gd->processing_msg = false;
e9c8d49d SG	235	return 0;
	236	}
	237
	238	int _log(enum log_category_t cat, enum log_level_t level, const char *file,
	239	int line, const char func, const char fmt, ...)
	240	{
e9c8d49d SG	241	struct log_rec rec;
	242	va_list args;
	243
f0e90e0e PD	244	if (!gd)
	245	return -ENOSYS;
	246
d094a073 HS	247	/* Check for message continuation */
	248	if (cat == LOGC_CONT)
	249	cat = gd->logc_prev;
	250	if (level == LOGL_CONT)
	251	level = gd->logl_prev;
	252
e9c8d49d	253	rec.cat = cat;
52d3df7f	254	rec.level = level & LOGL_LEVEL_MASK;
79d5983b SG	255	rec.flags = 0;
	256	if (level & LOGL_FORCE_DEBUG)
	257	rec.flags \|= LOGRECF_FORCE_DEBUG;
9ad7a6c2 SG	258	if (gd->log_cont)
9ad7a6c2 SG	259	rec.flags \|= LOGRECF_CONT;
e9c8d49d SG	260	rec.file = file;
	261	rec.line = line;
	262	rec.func = func;
c698b998	263	rec.msg = NULL;
f0e90e0e PD	264
	265	if (!(gd->flags & GD_FLG_LOG_READY)) {
	266	gd->log_drop_count++;
dd500134 PD	267
dd500134 PD	268	/* display dropped traces with console puts and DEBUG_UART */
79d5983b SG	269	if (rec.level <= CONFIG_LOG_DEFAULT_LEVEL \|\|
79d5983b SG	270	rec.flags & LOGRECF_FORCE_DEBUG) {
c698b998 PD	271	char buf[CONFIG_SYS_CBSIZE];
c698b998 PD	272
dd500134 PD	273	va_start(args, fmt);
	274	vsnprintf(buf, sizeof(buf), fmt, args);
	275	puts(buf);
	276	va_end(args);
	277	}
	278
f0e90e0e PD	279	return -ENOSYS;
f0e90e0e PD	280	}
e9c8d49d	281	va_start(args, fmt);
c698b998	282	if (!log_dispatch(&rec, fmt, args)) {
d094a073 HS	283	gd->logc_prev = cat;
	284	gd->logl_prev = level;
	285	}
c698b998	286	va_end(args);
e9c8d49d SG	287
	288	return 0;
	289	}
	290
58b4b713 SG	291	#define MAX_LINE_LENGTH_BYTES 64
	292	#define DEFAULT_LINE_LENGTH_BYTES 16
	293
	294	int _log_buffer(enum log_category_t cat, enum log_level_t level,
	295	const char file, int line, const char func, ulong addr,
	296	const void *data, uint width, uint count, uint linelen)
	297	{
	298	if (linelen * width > MAX_LINE_LENGTH_BYTES)
	299	linelen = MAX_LINE_LENGTH_BYTES / width;
	300	if (linelen < 1)
	301	linelen = DEFAULT_LINE_LENGTH_BYTES / width;
	302
	303	while (count) {
	304	uint thislinelen;
	305	char buf[HEXDUMP_MAX_BUF_LENGTH(width * linelen)];
	306
	307	thislinelen = hexdump_line(addr, data, width, count, linelen,
	308	buf, sizeof(buf));
	309	assert(thislinelen >= 0);
	310	_log(cat, level, file, line, func, "%s\n", buf);
	311
	312	/* update references */
	313	data += thislinelen * width;
	314	addr += thislinelen * width;
	315	count -= thislinelen;
	316	}
	317
	318	return 0;
	319	}
	320
a02f84ee	321	int log_add_filter_flags(const char *drv_name, enum log_category_t cat_list[],
40455a69	322	enum log_level_t level, const char *file_list,
a02f84ee	323	int flags)
e9c8d49d SG	324	{
	325	struct log_filter *filt;
	326	struct log_device *ldev;
45fac9fc	327	int ret;
e9c8d49d SG	328	int i;
	329
	330	ldev = log_device_find_by_name(drv_name);
	331	if (!ldev)
	332	return -ENOENT;
c1f39edc	333	filt = calloc(1, sizeof(*filt));
e9c8d49d SG	334	if (!filt)
	335	return -ENOMEM;
	336
a02f84ee	337	filt->flags = flags;
e9c8d49d SG	338	if (cat_list) {
	339	filt->flags \|= LOGFF_HAS_CAT;
	340	for (i = 0; ; i++) {
45fac9fc SG	341	if (i == ARRAY_SIZE(filt->cat_list)) {
	342	ret = -ENOSPC;
	343	goto err;
	344	}
e9c8d49d SG	345	filt->cat_list[i] = cat_list[i];
	346	if (cat_list[i] == LOGC_END)
	347	break;
	348	}
	349	}
40455a69	350	filt->level = level;
e9c8d49d SG	351	if (file_list) {
e9c8d49d SG	352	filt->file_list = strdup(file_list);
45fac9fc	353	if (!filt->file_list) {
69529f98	354	ret = -ENOMEM;
45fac9fc SG	355	goto err;
45fac9fc SG	356	}
e9c8d49d SG	357	}
e9c8d49d SG	358	filt->filter_num = ldev->next_filter_num++;
fe3b1a2d SA	359	/* Add deny filters to the beginning of the list */
	360	if (flags & LOGFF_DENY)
	361	list_add(&filt->sibling_node, &ldev->filter_head);
	362	else
	363	list_add_tail(&filt->sibling_node, &ldev->filter_head);
e9c8d49d SG	364
	365	return filt->filter_num;
	366
45fac9fc	367	err:
e9c8d49d	368	free(filt);
45fac9fc	369	return ret;
e9c8d49d SG	370	}
	371
	372	int log_remove_filter(const char *drv_name, int filter_num)
	373	{
	374	struct log_filter *filt;
	375	struct log_device *ldev;
	376
	377	ldev = log_device_find_by_name(drv_name);
	378	if (!ldev)
	379	return -ENOENT;
	380
	381	list_for_each_entry(filt, &ldev->filter_head, sibling_node) {
	382	if (filt->filter_num == filter_num) {
	383	list_del(&filt->sibling_node);
	384	free(filt);
	385
	386	return 0;
	387	}
	388	}
	389
	390	return -ENOENT;
	391	}
	392
3d03ab63 SG	393	/**
	394	* log_find_device_by_drv() - Find a device by its driver
	395	*
	396	* @drv: Log driver
185f812c	397	* Return: Device associated with that driver, or NULL if not found
3d03ab63 SG	398	*/
	399	static struct log_device log_find_device_by_drv(struct log_driver drv)
	400	{
	401	struct log_device *ldev;
	402
	403	list_for_each_entry(ldev, &gd->log_head, sibling_node) {
	404	if (ldev->drv == drv)
	405	return ldev;
	406	}
	407	/*
	408	* It is quite hard to pass an invalid driver since passing an unknown
	409	* LOG_GET_DRIVER(xxx) would normally produce a compilation error. But
	410	* it is possible to pass NULL, for example, so this
	411	*/
	412
	413	return NULL;
	414	}
	415
	416	int log_device_set_enable(struct log_driver *drv, bool enable)
	417	{
	418	struct log_device *ldev;
	419
	420	ldev = log_find_device_by_drv(drv);
	421	if (!ldev)
	422	return -ENOENT;
	423	if (enable)
	424	ldev->flags \|= LOGDF_ENABLE;
	425	else
	426	ldev->flags &= ~LOGDF_ENABLE;
	427
	428	return 0;
	429	}
	430
e9c8d49d SG	431	int log_init(void)
	432	{
	433	struct log_driver *drv = ll_entry_start(struct log_driver, log_driver);
	434	const int count = ll_entry_count(struct log_driver, log_driver);
	435	struct log_driver *end = drv + count;
	436
	437	/*
	438	* We cannot add runtime data to the driver since it is likely stored
	439	* in rodata. Instead, set up a 'device' corresponding to each driver.
f98caa6a	440	* We only support having a single device for each driver.
e9c8d49d SG	441	*/
	442	INIT_LIST_HEAD((struct list_head *)&gd->log_head);
	443	while (drv < end) {
	444	struct log_device *ldev;
	445
	446	ldev = calloc(1, sizeof(*ldev));
	447	if (!ldev) {
	448	debug("%s: Cannot allocate memory\n", __func__);
	449	return -ENOMEM;
	450	}
	451	INIT_LIST_HEAD(&ldev->filter_head);
	452	ldev->drv = drv;
b4520300	453	ldev->flags = drv->flags;
e9c8d49d SG	454	list_add_tail(&ldev->sibling_node,
	455	(struct list_head *)&gd->log_head);
	456	drv++;
	457	}
af1bc0cf	458	gd->flags \|= GD_FLG_LOG_READY;
2b1dc29a	459	if (!gd->default_log_level)
f0b05c95	460	gd->default_log_level = CONFIG_LOG_DEFAULT_LEVEL;
3c21d773	461	gd->log_fmt = log_get_default_format();
d094a073 HS	462	gd->logc_prev = LOGC_NONE;
d094a073 HS	463	gd->logl_prev = LOGL_INFO;
e9c8d49d SG	464
	465	return 0;
	466	}