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printk: Straighten out log_flags into printk_info_flags

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In the past, `enum log_flags` was part of `struct log`, hence the name.
`struct log` has since been reworked and now this struct is stored
inside `struct printk_info`. However, the name was never updated, which
is somewhat confusing -- especially since these flags operate at the
record level rather than at the level of an abstract log.

printk_info_flags also joins its other metadata struct friends in
printk_ringbuffer.h.

Signed-off-by: Chris Down <chris@chrisdown.name>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/3dd801982f02603e6e3aa4f8bc4f5ebb830a4949.1623775748.git.chris@chrisdown.name
This commit is contained in:
Chris Down 2021-06-15 17:52:48 +01:00 committed by Petr Mladek
parent 91027d0a7a
commit a1ad4b8a19
2 changed files with 26 additions and 23 deletions
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6
kernel/printk/internal.h
View File

@ -12,6 +12,12 @@
#define PRINTK_NMI_CONTEXT_OFFSET 0x010000000
/* Flags for a single printk record. */
enum printk_info_flags {
LOG_NEWLINE = 2, /* text ended with a newline */
LOG_CONT = 8, /* text is a fragment of a continuation line */
};
__printf(4, 0)
int vprintk_store(int facility, int level,
const struct dev_printk_info *dev_info,

43
kernel/printk/printk.c
View File

@ -350,11 +350,6 @@ static int console_msg_format = MSG_FORMAT_DEFAULT;
* non-prinatable characters are escaped in the "\xff" notation.
*/
enum log_flags {
LOG_NEWLINE = 2, /* text ended with a newline */
LOG_CONT = 8, /* text is a fragment of a continuation line */
};
/* syslog_lock protects syslog_* variables and write access to clear_seq. */
static DEFINE_RAW_SPINLOCK(syslog_lock);
@ -1965,19 +1960,20 @@ static inline u32 printk_caller_id(void)
*
* @text: The terminated text message.
* @level: A pointer to the current level value, will be updated.
* @lflags: A pointer to the current log flags, will be updated.
* @flags: A pointer to the current printk_info flags, will be updated.
*
* @level may be NULL if the caller is not interested in the parsed value.
* Otherwise the variable pointed to by @level must be set to
* LOGLEVEL_DEFAULT in order to be updated with the parsed value.
*
* @lflags may be NULL if the caller is not interested in the parsed value.
* Otherwise the variable pointed to by @lflags will be OR'd with the parsed
* @flags may be NULL if the caller is not interested in the parsed value.
* Otherwise the variable pointed to by @flags will be OR'd with the parsed
* value.
*
* Return: The length of the parsed level and control flags.
*/
static u16 parse_prefix(char *text, int *level, enum log_flags *lflags)
static u16 parse_prefix(char *text, int *level,
enum printk_info_flags *flags)
{
u16 prefix_len = 0;
int kern_level;
@ -1993,8 +1989,8 @@ static u16 parse_prefix(char *text, int *level, enum log_flags *lflags)
*level = kern_level - '0';
break;
case 'c': /* KERN_CONT */
if (lflags)
*lflags |= LOG_CONT;
if (flags)
*flags |= LOG_CONT;
}
prefix_len += 2;
@ -2004,8 +2000,9 @@ static u16 parse_prefix(char *text, int *level, enum log_flags *lflags)
return prefix_len;
}
static u16 printk_sprint(char *text, u16 size, int facility, enum log_flags *lflags,
const char *fmt, va_list args)
static u16 printk_sprint(char *text, u16 size, int facility,
enum printk_info_flags *flags, const char *fmt,
va_list args)
{
u16 text_len;
@ -2014,7 +2011,7 @@ static u16 printk_sprint(char *text, u16 size, int facility, enum log_flags *lfl
/* Mark and strip a trailing newline. */
if (text_len && text[text_len - 1] == '\n') {
text_len--;
*lflags |= LOG_NEWLINE;
*flags |= LOG_NEWLINE;
}
/* Strip log level and control flags. */
@ -2038,7 +2035,7 @@ int vprintk_store(int facility, int level,
{
const u32 caller_id = printk_caller_id();
struct prb_reserved_entry e;
enum log_flags lflags = 0;
enum printk_info_flags flags = 0;
struct printk_record r;
u16 trunc_msg_len = 0;
char prefix_buf[8];
@ -2070,22 +2067,22 @@ int vprintk_store(int facility, int level,
/* Extract log level or control flags. */
if (facility == 0)
parse_prefix(&prefix_buf[0], &level, &lflags);
parse_prefix(&prefix_buf[0], &level, &flags);
if (level == LOGLEVEL_DEFAULT)
level = default_message_loglevel;
if (dev_info)
lflags |= LOG_NEWLINE;
flags |= LOG_NEWLINE;
if (lflags & LOG_CONT) {
if (flags & LOG_CONT) {
prb_rec_init_wr(&r, reserve_size);
if (prb_reserve_in_last(&e, prb, &r, caller_id, LOG_LINE_MAX)) {
text_len = printk_sprint(&r.text_buf[r.info->text_len], reserve_size,
facility, &lflags, fmt, args);
facility, &flags, fmt, args);
r.info->text_len += text_len;
if (lflags & LOG_NEWLINE) {
if (flags & LOG_NEWLINE) {
r.info->flags |= LOG_NEWLINE;
prb_final_commit(&e);
} else {
@ -2112,20 +2109,20 @@ int vprintk_store(int facility, int level,
}
/* fill message */
text_len = printk_sprint(&r.text_buf[0], reserve_size, facility, &lflags, fmt, args);
text_len = printk_sprint(&r.text_buf[0], reserve_size, facility, &flags, fmt, args);
if (trunc_msg_len)
memcpy(&r.text_buf[text_len], trunc_msg, trunc_msg_len);
r.info->text_len = text_len + trunc_msg_len;
r.info->facility = facility;
r.info->level = level & 7;
r.info->flags = lflags & 0x1f;
r.info->flags = flags & 0x1f;
r.info->ts_nsec = ts_nsec;
r.info->caller_id = caller_id;
if (dev_info)
memcpy(&r.info->dev_info, dev_info, sizeof(r.info->dev_info));
/* A message without a trailing newline can be continued. */
if (!(lflags & LOG_NEWLINE))
if (!(flags & LOG_NEWLINE))
prb_commit(&e);
else
prb_final_commit(&e);