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common/log.c
6.86 KB
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// SPDX-License-Identifier: GPL-2.0+ |
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/* * Logging support * * Copyright (c) 2017 Google, Inc * Written by Simon Glass <sjg@chromium.org> |
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*/ #include <common.h> #include <log.h> #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] = { "none", "arch", "board", "core", "driver-model", "device-tree", |
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"efi", |
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}; static const char *log_level_name[LOGL_COUNT] = { "EMERG", "ALERT", "CRIT", "ERR", "WARNING", "NOTICE", "INFO", "DEBUG", "CONTENT", "IO", }; const char *log_get_cat_name(enum log_category_t cat) { |
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const char *name; if (cat < 0 || cat >= LOGC_COUNT) return "<invalid>"; |
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if (cat >= LOGC_NONE) return log_cat_name[cat - LOGC_NONE]; |
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name = uclass_get_name((enum uclass_id)cat); return name ? name : "<missing>"; |
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} 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; } |
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static 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; } /** * log_has_cat() - check if a log category exists within a list * * @cat_list: List of categories to check, at most LOGF_MAX_CATEGORIES entries * long, terminated by LC_END if fewer * @cat: Category to search for * @return true if @cat is in @cat_list, else false */ static 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; } /** * log_has_file() - check if a file is with a list * * @file_list: List of files to check, separated by comma * @file: File to check for. This string is matched against the end of each * file in the list, i.e. ignoring any preceding path. The list is * intended to consist of relative pathnames, e.g. common/main.c,cmd/log.c * @return true if @file is in @file_list, else false */ static 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 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 (rec->level > filt->max_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; 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 * * @rec: Log record to dispatch * @return 0 (meaning success) */ static int log_dispatch(struct log_rec *rec) { struct log_device *ldev; list_for_each_entry(ldev, &gd->log_head, sibling_node) { if (log_passes_filters(ldev, rec)) ldev->drv->emit(ldev, rec); } 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, ...) { char buf[CONFIG_SYS_CBSIZE]; struct log_rec rec; va_list args; rec.cat = cat; rec.level = level; rec.file = file; rec.line = line; rec.func = func; va_start(args, fmt); vsnprintf(buf, sizeof(buf), fmt, args); va_end(args); rec.msg = buf; if (!gd || !(gd->flags & GD_FLG_LOG_READY)) { if (gd) gd->log_drop_count++; return -ENOSYS; } log_dispatch(&rec); return 0; } int log_add_filter(const char *drv_name, enum log_category_t cat_list[], enum log_level_t max_level, const char *file_list) { struct log_filter *filt; struct log_device *ldev; |
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int ret; |
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int i; ldev = log_device_find_by_name(drv_name); if (!ldev) return -ENOENT; filt = (struct log_filter *)calloc(1, sizeof(*filt)); if (!filt) return -ENOMEM; if (cat_list) { filt->flags |= LOGFF_HAS_CAT; for (i = 0; ; i++) { |
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if (i == ARRAY_SIZE(filt->cat_list)) { ret = -ENOSPC; goto err; } |
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filt->cat_list[i] = cat_list[i]; if (cat_list[i] == LOGC_END) break; } } filt->max_level = max_level; if (file_list) { filt->file_list = strdup(file_list); |
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if (!filt->file_list) { ret = ENOMEM; goto err; } |
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} filt->filter_num = ldev->next_filter_num++; list_add_tail(&filt->sibling_node, &ldev->filter_head); 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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} 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; } 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 ", __func__); return -ENOMEM; } INIT_LIST_HEAD(&ldev->filter_head); ldev->drv = drv; list_add_tail(&ldev->sibling_node, (struct list_head *)&gd->log_head); drv++; } |
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gd->flags |= GD_FLG_LOG_READY; |
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if (!gd->default_log_level) gd->default_log_level = LOGL_INFO; |
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gd->log_fmt = LOGF_DEFAULT; |
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return 0; } |