// SPDX-License-Identifier: GPL-2.0-only
/*
 * Complete scope from Linux v6.18 mm/page-writeback.c.
 * Source: https://github.com/torvalds/linux/blob/v6.18/mm/page-writeback.c
 * Copyright (C) 2002, Linus Torvalds.
 * Copyright (C) 2007 Red Hat, Inc., Peter Zijlstra
 * 10Apr2002 Andrew Morton -- Initial version.
 * Kernel excerpt; not a standalone program.
 * The book's exact source tag is not asserted.
 */

static void folio_account_dirtied(struct folio *folio,
		struct address_space *mapping)
{
	struct inode *inode = mapping->host;

	trace_writeback_dirty_folio(folio, mapping);

	if (mapping_can_writeback(mapping)) {
		struct bdi_writeback *wb;
		long nr = folio_nr_pages(folio);

		inode_attach_wb(inode, folio);
		wb = inode_to_wb(inode);

		__lruvec_stat_mod_folio(folio, NR_FILE_DIRTY, nr);
		__zone_stat_mod_folio(folio, NR_ZONE_WRITE_PENDING, nr);
		__node_stat_mod_folio(folio, NR_DIRTIED, nr);
		wb_stat_mod(wb, WB_RECLAIMABLE, nr);
		wb_stat_mod(wb, WB_DIRTIED, nr);
		task_io_account_write(nr * PAGE_SIZE);
		current->nr_dirtied += nr;
		__this_cpu_add(bdp_ratelimits, nr);

		mem_cgroup_track_foreign_dirty(folio, wb);
	}
}