diff options
Diffstat (limited to 'common/log.c')
| -rw-r--r-- | common/log.c | 146 |
1 files changed, 106 insertions, 40 deletions
diff --git a/common/log.c b/common/log.c index 9a5f100da3..4b6f3fcd04 100644 --- a/common/log.c +++ b/common/log.c @@ -13,7 +13,7 @@ DECLARE_GLOBAL_DATA_PTR; -static const char *log_cat_name[LOGC_COUNT - LOGC_NONE] = { +static const char *const log_cat_name[] = { "none", "arch", "board", @@ -21,9 +21,17 @@ static const char *log_cat_name[LOGC_COUNT - LOGC_NONE] = { "driver-model", "device-tree", "efi", + "alloc", + "sandbox", + "bloblist", + "devres", + "acpi", }; -static const char *log_level_name[LOGL_COUNT] = { +_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", @@ -36,6 +44,9 @@ static const char *log_level_name[LOGL_COUNT] = { "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; @@ -88,7 +99,7 @@ enum log_level_t log_get_level_by_name(const char *name) return LOGL_NONE; } -static struct log_device *log_device_find_by_name(const char *drv_name) +struct log_device *log_device_find_by_name(const char *drv_name) { struct log_device *ldev; @@ -100,15 +111,7 @@ static struct log_device *log_device_find_by_name(const char *drv_name) 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) +bool log_has_cat(enum log_category_t cat_list[], enum log_category_t cat) { int i; @@ -120,16 +123,7 @@ static bool log_has_cat(enum log_category_t cat_list[], enum log_category_t cat) 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) +bool log_has_file(const char *file_list, const char *file) { int file_len = strlen(file); const char *s, *p; @@ -157,6 +151,9 @@ static bool log_passes_filters(struct log_device *ldev, struct log_rec *rec) { struct log_filter *filt; + if (rec->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) @@ -165,15 +162,25 @@ static bool log_passes_filters(struct log_device *ldev, struct log_rec *rec) } list_for_each_entry(filt, &ldev->filter_head, sibling_node) { - if (rec->level > filt->max_level) + 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; - return true; + + if (filt->flags & LOGFF_DENY) + return false; + else + return true; } return false; @@ -183,31 +190,33 @@ static bool log_passes_filters(struct log_device *ldev, struct log_rec *rec) * 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 + * filters which block the record. * - * @rec: Log record to dispatch - * @return 0 (meaning success) + * 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) { struct log_device *ldev; - static int processing_msg; /* * 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 (processing_msg) - return 0; + if (gd->processing_msg) + return 1; /* Emit message */ - processing_msg = 1; + gd->processing_msg = true; list_for_each_entry(ldev, &gd->log_head, sibling_node) { - if (log_passes_filters(ldev, rec)) + if ((ldev->flags & LOGDF_ENABLE) && + log_passes_filters(ldev, rec)) ldev->drv->emit(ldev, rec); } - processing_msg = 0; + gd->processing_msg = false; return 0; } @@ -218,8 +227,15 @@ int _log(enum log_category_t cat, enum log_level_t level, const char *file, struct log_rec rec; va_list args; + /* 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; + rec.level = level & LOGL_LEVEL_MASK; + rec.force_debug = level & LOGL_FORCE_DEBUG; rec.file = file; rec.line = line; rec.func = func; @@ -232,13 +248,17 @@ int _log(enum log_category_t cat, enum log_level_t level, const char *file, gd->log_drop_count++; return -ENOSYS; } - log_dispatch(&rec); + if (!log_dispatch(&rec)) { + gd->logc_prev = cat; + gd->logl_prev = level; + } 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) +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; @@ -252,6 +272,7 @@ int log_add_filter(const char *drv_name, enum log_category_t cat_list[], if (!filt) return -ENOMEM; + filt->flags = flags; if (cat_list) { filt->flags |= LOGFF_HAS_CAT; for (i = 0; ; i++) { @@ -264,16 +285,20 @@ int log_add_filter(const char *drv_name, enum log_category_t cat_list[], break; } } - filt->max_level = max_level; + filt->level = level; if (file_list) { filt->file_list = strdup(file_list); if (!filt->file_list) { - ret = ENOMEM; + ret = -ENOMEM; goto err; } } filt->filter_num = ldev->next_filter_num++; - list_add_tail(&filt->sibling_node, &ldev->filter_head); + /* 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; @@ -303,6 +328,44 @@ int log_remove_filter(const char *drv_name, int filter_num) 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); @@ -325,6 +388,7 @@ int log_init(void) } 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++; @@ -333,6 +397,8 @@ int log_init(void) 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; } |