printk: Straighten out log_flags into printk_info_flags

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

diff --git a/kernel/printk/internal.h b/kernel/printk/internal.h
index 51615c9..1075e60 100644 (file)
--- a/kernel/printk/internal.h
+++ b/kernel/printk/internal.h
@@ -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,

diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 142a58d..39f1ec2 100644 (file)
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -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);