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2364b40682
The size limit macros are located further down in printk.c and behind ifdef conditionals. This complicates their usage for upcoming changes. Move the macros into internal.h so that they are still invisible outside of printk, but easily accessible for printk. Also, the maximum size of formatted extended messages does not need to be known by any code outside of printk, so move it to internal.h as well. And like CONSOLE_LOG_MAX, for !CONFIG_PRINTK set CONSOLE_EXT_LOG_MAX to 0 to reduce the static memory footprint. Signed-off-by: John Ogness <john.ogness@linutronix.de> Reviewed-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Petr Mladek <pmladek@suse.com> Link: https://lore.kernel.org/r/20230109100800.1085541-2-john.ogness@linutronix.de
84 lines
2.3 KiB
C
84 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* internal.h - printk internal definitions
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*/
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#include <linux/percpu.h>
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#if defined(CONFIG_PRINTK) && defined(CONFIG_SYSCTL)
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void __init printk_sysctl_init(void);
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int devkmsg_sysctl_set_loglvl(struct ctl_table *table, int write,
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void *buffer, size_t *lenp, loff_t *ppos);
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#else
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#define printk_sysctl_init() do { } while (0)
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#endif
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#ifdef CONFIG_PRINTK
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#ifdef CONFIG_PRINTK_CALLER
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#define PREFIX_MAX 48
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#else
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#define PREFIX_MAX 32
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#endif
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/* the maximum size of a formatted record (i.e. with prefix added per line) */
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#define CONSOLE_LOG_MAX 1024
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/* the maximum size of a formatted extended record */
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#define CONSOLE_EXT_LOG_MAX 8192
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/* the maximum size for a dropped text message */
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#define DROPPED_TEXT_MAX 64
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/* the maximum size allowed to be reserved for a record */
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#define LOG_LINE_MAX (CONSOLE_LOG_MAX - PREFIX_MAX)
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/* Flags for a single printk record. */
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enum printk_info_flags {
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LOG_NEWLINE = 2, /* text ended with a newline */
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LOG_CONT = 8, /* text is a fragment of a continuation line */
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};
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__printf(4, 0)
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int vprintk_store(int facility, int level,
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const struct dev_printk_info *dev_info,
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const char *fmt, va_list args);
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__printf(1, 0) int vprintk_default(const char *fmt, va_list args);
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__printf(1, 0) int vprintk_deferred(const char *fmt, va_list args);
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bool printk_percpu_data_ready(void);
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#define printk_safe_enter_irqsave(flags) \
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do { \
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local_irq_save(flags); \
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__printk_safe_enter(); \
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} while (0)
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#define printk_safe_exit_irqrestore(flags) \
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do { \
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__printk_safe_exit(); \
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local_irq_restore(flags); \
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} while (0)
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void defer_console_output(void);
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u16 printk_parse_prefix(const char *text, int *level,
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enum printk_info_flags *flags);
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#else
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#define PREFIX_MAX 0
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#define CONSOLE_LOG_MAX 0
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#define CONSOLE_EXT_LOG_MAX 0
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#define DROPPED_TEXT_MAX 0
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#define LOG_LINE_MAX 0
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/*
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* In !PRINTK builds we still export console_sem
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* semaphore and some of console functions (console_unlock()/etc.), so
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* printk-safe must preserve the existing local IRQ guarantees.
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*/
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#define printk_safe_enter_irqsave(flags) local_irq_save(flags)
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#define printk_safe_exit_irqrestore(flags) local_irq_restore(flags)
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static inline bool printk_percpu_data_ready(void) { return false; }
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#endif /* CONFIG_PRINTK */
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