ircd::db: Add interface to checksum files per column.

modules/console: Add column params to db check cmd.

include/ircd/db/column.h

@@ -70,6 +70,7 @@ namespace ircd::db
 	void compact(column &, const std::pair<string_view, string_view> &, const int &to_level = -1, const compactor & = {});
 	void compact(column &, const std::pair<int, int> &level = {-1, -1}, const compactor & = {});
 	void sort(column &, const bool &blocking = false, const bool &now = false);
+	void check(column &);
 	void drop(column &); // danger
 }
 

ircd/db.cc

@@ -5960,6 +5960,27 @@ ircd::db::drop(column &column)
 	drop(c);
 }
 
+void
+ircd::db::check(column &column)
+{
+	database &d(column);
+	const auto &files
+	{
+		db::files(column)
+	};
+
+	for(const auto &file : files)
+	{
+		const auto &path
+		{
+			 // remove false leading slash; the rest is relative to db.
+			lstrip(file, '/')
+		};
+
+		db::check(d, path);
+	}
+}
+
 void
 ircd::db::sort(column &column,
                const bool &blocking,

modules/console.cc

@@ -4399,9 +4399,19 @@ bool
 console_cmd__db__check(opt &out, const string_view &line)
 try
 {
-	const auto dbname
+	const params param{line, " ",
 	{
-		token(line, ' ', 0)
+		"dbname", "column"
+	}};
+
+	const auto &dbname
+	{
+		param.at("dbname")
+	};
+
+	const auto &colname
+	{
+		param["column"]
 	};
 
 	auto &database
@@ -4409,6 +4419,20 @@ try
 		db::database::get(dbname)
 	};
 
+	if(colname)
+	{
+		db::column column
+		{
+			database[colname]
+		};
+
+		check(column);
+		out << "Check of " << colname << " in " << dbname << " completed without error."
+		    << std::endl;
+
+		return true;
+	}
+
 	check(database);
 	out << "Check of " << dbname << " completed without error."
 	    << std::endl;