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https://github.com/brain-hackers/u-boot-brain
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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
319 lines
6.8 KiB
C
319 lines
6.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Logging support
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*
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* Copyright (c) 2017 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#include <common.h>
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#include <log.h>
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#include <malloc.h>
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#include <dm/uclass.h>
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DECLARE_GLOBAL_DATA_PTR;
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static const char *log_cat_name[LOGC_COUNT - LOGC_NONE] = {
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"none",
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"arch",
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"board",
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"core",
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"driver-model",
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"device-tree",
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"efi",
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};
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static const char *log_level_name[LOGL_COUNT] = {
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"EMERG",
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"ALERT",
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"CRIT",
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"ERR",
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"WARNING",
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"NOTICE",
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"INFO",
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"DEBUG",
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"CONTENT",
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"IO",
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};
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const char *log_get_cat_name(enum log_category_t cat)
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{
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if (cat > LOGC_COUNT)
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return "invalid";
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if (cat >= LOGC_NONE)
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return log_cat_name[cat - LOGC_NONE];
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return uclass_get_name((enum uclass_id)cat);
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}
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enum log_category_t log_get_cat_by_name(const char *name)
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{
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enum uclass_id id;
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int i;
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for (i = LOGC_NONE; i < LOGC_COUNT; i++)
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if (!strcmp(name, log_cat_name[i - LOGC_NONE]))
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return i;
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id = uclass_get_by_name(name);
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if (id != UCLASS_INVALID)
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return (enum log_category_t)id;
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return LOGC_NONE;
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}
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const char *log_get_level_name(enum log_level_t level)
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{
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if (level >= LOGL_COUNT)
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return "INVALID";
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return log_level_name[level];
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}
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enum log_level_t log_get_level_by_name(const char *name)
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{
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int i;
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for (i = 0; i < LOGL_COUNT; i++) {
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if (!strcasecmp(log_level_name[i], name))
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return i;
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}
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return LOGL_NONE;
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}
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static struct log_device *log_device_find_by_name(const char *drv_name)
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{
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struct log_device *ldev;
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list_for_each_entry(ldev, &gd->log_head, sibling_node) {
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if (!strcmp(drv_name, ldev->drv->name))
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return ldev;
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}
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return NULL;
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}
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/**
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* log_has_cat() - check if a log category exists within a list
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*
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* @cat_list: List of categories to check, at most LOGF_MAX_CATEGORIES entries
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* long, terminated by LC_END if fewer
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* @cat: Category to search for
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* @return true if @cat is in @cat_list, else false
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*/
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static bool log_has_cat(enum log_category_t cat_list[], enum log_category_t cat)
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{
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int i;
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for (i = 0; i < LOGF_MAX_CATEGORIES && cat_list[i] != LOGC_END; i++) {
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if (cat_list[i] == cat)
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return true;
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}
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return false;
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}
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/**
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* log_has_file() - check if a file is with a list
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*
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* @file_list: List of files to check, separated by comma
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* @file: File to check for. This string is matched against the end of each
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* file in the list, i.e. ignoring any preceding path. The list is
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* intended to consist of relative pathnames, e.g. common/main.c,cmd/log.c
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* @return true if @file is in @file_list, else false
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*/
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static bool log_has_file(const char *file_list, const char *file)
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{
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int file_len = strlen(file);
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const char *s, *p;
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int substr_len;
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for (s = file_list; *s; s = p + (*p != '\0')) {
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p = strchrnul(s, ',');
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substr_len = p - s;
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if (file_len >= substr_len &&
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!strncmp(file + file_len - substr_len, s, substr_len))
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return true;
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}
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return false;
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}
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/**
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* log_passes_filters() - check if a log record passes the filters for a device
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*
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* @ldev: Log device to check
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* @rec: Log record to check
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* @return true if @rec is not blocked by the filters in @ldev, false if it is
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*/
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static bool log_passes_filters(struct log_device *ldev, struct log_rec *rec)
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{
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struct log_filter *filt;
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/* If there are no filters, filter on the default log level */
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if (list_empty(&ldev->filter_head)) {
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if (rec->level > gd->default_log_level)
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return false;
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return true;
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}
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list_for_each_entry(filt, &ldev->filter_head, sibling_node) {
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if (rec->level > filt->max_level)
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continue;
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if ((filt->flags & LOGFF_HAS_CAT) &&
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!log_has_cat(filt->cat_list, rec->cat))
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continue;
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if (filt->file_list &&
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!log_has_file(filt->file_list, rec->file))
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continue;
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return true;
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}
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return false;
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}
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/**
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* log_dispatch() - Send a log record to all log devices for processing
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*
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* The log record is sent to each log device in turn, skipping those which have
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* filters which block the record
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*
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* @rec: Log record to dispatch
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* @return 0 (meaning success)
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*/
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static int log_dispatch(struct log_rec *rec)
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{
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struct log_device *ldev;
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list_for_each_entry(ldev, &gd->log_head, sibling_node) {
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if (log_passes_filters(ldev, rec))
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ldev->drv->emit(ldev, rec);
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}
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return 0;
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}
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int _log(enum log_category_t cat, enum log_level_t level, const char *file,
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int line, const char *func, const char *fmt, ...)
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{
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char buf[CONFIG_SYS_CBSIZE];
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struct log_rec rec;
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va_list args;
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rec.cat = cat;
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rec.level = level;
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rec.file = file;
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rec.line = line;
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rec.func = func;
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va_start(args, fmt);
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vsnprintf(buf, sizeof(buf), fmt, args);
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va_end(args);
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rec.msg = buf;
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if (!gd || !(gd->flags & GD_FLG_LOG_READY)) {
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if (gd)
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gd->log_drop_count++;
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return -ENOSYS;
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}
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log_dispatch(&rec);
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return 0;
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}
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int log_add_filter(const char *drv_name, enum log_category_t cat_list[],
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enum log_level_t max_level, const char *file_list)
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{
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struct log_filter *filt;
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struct log_device *ldev;
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int ret;
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int i;
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ldev = log_device_find_by_name(drv_name);
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if (!ldev)
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return -ENOENT;
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filt = (struct log_filter *)calloc(1, sizeof(*filt));
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if (!filt)
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return -ENOMEM;
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if (cat_list) {
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filt->flags |= LOGFF_HAS_CAT;
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for (i = 0; ; i++) {
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if (i == ARRAY_SIZE(filt->cat_list)) {
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ret = -ENOSPC;
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goto err;
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}
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filt->cat_list[i] = cat_list[i];
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if (cat_list[i] == LOGC_END)
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break;
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}
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}
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filt->max_level = max_level;
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if (file_list) {
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filt->file_list = strdup(file_list);
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if (!filt->file_list) {
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ret = ENOMEM;
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goto err;
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}
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}
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filt->filter_num = ldev->next_filter_num++;
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list_add_tail(&filt->sibling_node, &ldev->filter_head);
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return filt->filter_num;
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err:
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free(filt);
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return ret;
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}
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int log_remove_filter(const char *drv_name, int filter_num)
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{
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struct log_filter *filt;
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struct log_device *ldev;
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ldev = log_device_find_by_name(drv_name);
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if (!ldev)
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return -ENOENT;
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list_for_each_entry(filt, &ldev->filter_head, sibling_node) {
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if (filt->filter_num == filter_num) {
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list_del(&filt->sibling_node);
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free(filt);
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return 0;
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}
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}
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return -ENOENT;
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}
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int log_init(void)
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{
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struct log_driver *drv = ll_entry_start(struct log_driver, log_driver);
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const int count = ll_entry_count(struct log_driver, log_driver);
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struct log_driver *end = drv + count;
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/*
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* We cannot add runtime data to the driver since it is likely stored
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* in rodata. Instead, set up a 'device' corresponding to each driver.
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* We only support having a single device.
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*/
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INIT_LIST_HEAD((struct list_head *)&gd->log_head);
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while (drv < end) {
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struct log_device *ldev;
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ldev = calloc(1, sizeof(*ldev));
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if (!ldev) {
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debug("%s: Cannot allocate memory\n", __func__);
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return -ENOMEM;
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}
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INIT_LIST_HEAD(&ldev->filter_head);
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ldev->drv = drv;
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list_add_tail(&ldev->sibling_node,
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(struct list_head *)&gd->log_head);
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drv++;
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}
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gd->flags |= GD_FLG_LOG_READY;
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gd->default_log_level = LOGL_INFO;
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gd->log_fmt = LOGF_DEFAULT;
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return 0;
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}
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