Perhaps have an sb_alloc function and a failure mode that
uses printk when sb_alloc fails or sb_append is passed null?
Perhaps something like:
stringbuf *sb_alloc(char* level, gfp_t priority)
{
stringbuf *sb = kmalloc(sizeof(*sb), priority);
if (sb)
sb>len = sprintf(sb->buf, "%s", level);
else
printk(level);
return sb;
}
EXPORT_SYMBOL(sb_alloc);
/**
* sb_append - append to a stringbuf
* @sb: a pointer to the stringbuf
* @fmt: printf-style format
*/
void sb_append(struct stringbuf *sb, const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
if (sb)
sb->len += vscnprintf(&sb->buf[len], sizeof(sb->buf) - sb->len, fmt, args);
else
vprintk(fmt, args);
va_end(args);
}
EXPORT_SYMBOL(sb_append);
void sb_printk(struct stringbuf *sb)
{
if (sb && sb->len > 0) {
printk(sb->buf);
sb->len = 0;
}
}
EXPORT_SYMBOL(sb_printk);
void sb_free(stringbuf *sb)
{
kfree(sb);
}
EXPORT_SYMBOL(sb_free);
-
