1 // SPDX-License-Identifier: GPL-2.0+
5 * Copyright (c) 2017 Google, Inc
6 * Written by Simon Glass <sjg@chromium.org>
12 #include <dm/uclass.h>
14 DECLARE_GLOBAL_DATA_PTR;
16 static const char *log_cat_name[LOGC_COUNT - LOGC_NONE] = {
26 static const char *log_level_name[LOGL_COUNT] = {
39 const char *log_get_cat_name(enum log_category_t cat)
43 if (cat < 0 || cat >= LOGC_COUNT)
46 return log_cat_name[cat - LOGC_NONE];
48 name = uclass_get_name((enum uclass_id)cat);
50 return name ? name : "<missing>";
53 enum log_category_t log_get_cat_by_name(const char *name)
58 for (i = LOGC_NONE; i < LOGC_COUNT; i++)
59 if (!strcmp(name, log_cat_name[i - LOGC_NONE]))
61 id = uclass_get_by_name(name);
62 if (id != UCLASS_INVALID)
63 return (enum log_category_t)id;
68 const char *log_get_level_name(enum log_level_t level)
70 if (level >= LOGL_COUNT)
72 return log_level_name[level];
75 enum log_level_t log_get_level_by_name(const char *name)
79 for (i = 0; i < LOGL_COUNT; i++) {
80 if (!strcasecmp(log_level_name[i], name))
87 static struct log_device *log_device_find_by_name(const char *drv_name)
89 struct log_device *ldev;
91 list_for_each_entry(ldev, &gd->log_head, sibling_node) {
92 if (!strcmp(drv_name, ldev->drv->name))
100 * log_has_cat() - check if a log category exists within a list
102 * @cat_list: List of categories to check, at most LOGF_MAX_CATEGORIES entries
103 * long, terminated by LC_END if fewer
104 * @cat: Category to search for
105 * @return true if @cat is in @cat_list, else false
107 static bool log_has_cat(enum log_category_t cat_list[], enum log_category_t cat)
111 for (i = 0; i < LOGF_MAX_CATEGORIES && cat_list[i] != LOGC_END; i++) {
112 if (cat_list[i] == cat)
120 * log_has_file() - check if a file is with a list
122 * @file_list: List of files to check, separated by comma
123 * @file: File to check for. This string is matched against the end of each
124 * file in the list, i.e. ignoring any preceding path. The list is
125 * intended to consist of relative pathnames, e.g. common/main.c,cmd/log.c
126 * @return true if @file is in @file_list, else false
128 static bool log_has_file(const char *file_list, const char *file)
130 int file_len = strlen(file);
134 for (s = file_list; *s; s = p + (*p != '\0')) {
135 p = strchrnul(s, ',');
137 if (file_len >= substr_len &&
138 !strncmp(file + file_len - substr_len, s, substr_len))
146 * log_passes_filters() - check if a log record passes the filters for a device
148 * @ldev: Log device to check
149 * @rec: Log record to check
150 * @return true if @rec is not blocked by the filters in @ldev, false if it is
152 static bool log_passes_filters(struct log_device *ldev, struct log_rec *rec)
154 struct log_filter *filt;
156 /* If there are no filters, filter on the default log level */
157 if (list_empty(&ldev->filter_head)) {
158 if (rec->level > gd->default_log_level)
163 list_for_each_entry(filt, &ldev->filter_head, sibling_node) {
164 if (rec->level > filt->max_level)
166 if ((filt->flags & LOGFF_HAS_CAT) &&
167 !log_has_cat(filt->cat_list, rec->cat))
169 if (filt->file_list &&
170 !log_has_file(filt->file_list, rec->file))
179 * log_dispatch() - Send a log record to all log devices for processing
181 * The log record is sent to each log device in turn, skipping those which have
182 * filters which block the record
184 * @rec: Log record to dispatch
185 * @return 0 (meaning success)
187 static int log_dispatch(struct log_rec *rec)
189 struct log_device *ldev;
191 list_for_each_entry(ldev, &gd->log_head, sibling_node) {
192 if (log_passes_filters(ldev, rec))
193 ldev->drv->emit(ldev, rec);
199 int _log(enum log_category_t cat, enum log_level_t level, const char *file,
200 int line, const char *func, const char *fmt, ...)
202 char buf[CONFIG_SYS_CBSIZE];
212 vsnprintf(buf, sizeof(buf), fmt, args);
215 if (!gd || !(gd->flags & GD_FLG_LOG_READY)) {
217 gd->log_drop_count++;
225 int log_add_filter(const char *drv_name, enum log_category_t cat_list[],
226 enum log_level_t max_level, const char *file_list)
228 struct log_filter *filt;
229 struct log_device *ldev;
233 ldev = log_device_find_by_name(drv_name);
236 filt = (struct log_filter *)calloc(1, sizeof(*filt));
241 filt->flags |= LOGFF_HAS_CAT;
243 if (i == ARRAY_SIZE(filt->cat_list)) {
247 filt->cat_list[i] = cat_list[i];
248 if (cat_list[i] == LOGC_END)
252 filt->max_level = max_level;
254 filt->file_list = strdup(file_list);
255 if (!filt->file_list) {
260 filt->filter_num = ldev->next_filter_num++;
261 list_add_tail(&filt->sibling_node, &ldev->filter_head);
263 return filt->filter_num;
270 int log_remove_filter(const char *drv_name, int filter_num)
272 struct log_filter *filt;
273 struct log_device *ldev;
275 ldev = log_device_find_by_name(drv_name);
279 list_for_each_entry(filt, &ldev->filter_head, sibling_node) {
280 if (filt->filter_num == filter_num) {
281 list_del(&filt->sibling_node);
293 struct log_driver *drv = ll_entry_start(struct log_driver, log_driver);
294 const int count = ll_entry_count(struct log_driver, log_driver);
295 struct log_driver *end = drv + count;
298 * We cannot add runtime data to the driver since it is likely stored
299 * in rodata. Instead, set up a 'device' corresponding to each driver.
300 * We only support having a single device.
302 INIT_LIST_HEAD((struct list_head *)&gd->log_head);
304 struct log_device *ldev;
306 ldev = calloc(1, sizeof(*ldev));
308 debug("%s: Cannot allocate memory\n", __func__);
311 INIT_LIST_HEAD(&ldev->filter_head);
313 list_add_tail(&ldev->sibling_node,
314 (struct list_head *)&gd->log_head);
317 gd->flags |= GD_FLG_LOG_READY;
318 gd->default_log_level = LOGL_INFO;
319 gd->log_fmt = LOGF_DEFAULT;