path: root/fs/zonefs/super.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Simple file system for zoned block devices exposing zones as files.
 *
 * Copyright (C) 2019 Western Digital Corporation or its affiliates.
 */
#include <linux/module.h>
#include <linux/pagemap.h>
#include <linux/magic.h>
#include <linux/iomap.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/blkdev.h>
#include <linux/statfs.h>
#include <linux/writeback.h>
#include <linux/quotaops.h>
#include <linux/seq_file.h>
#include <linux/uio.h>
#include <linux/mman.h>
#include <linux/sched/mm.h>
#include <linux/crc32.h>
#include <linux/task_io_accounting_ops.h>
#include <linux/fs_parser.h>
#include <linux/fs_context.h>

#include "zonefs.h"

#define CREATE_TRACE_POINTS
#include "trace.h"

/*
 * Get the name of a zone group directory.
 */
static const char *zonefs_zgroup_name(enum zonefs_ztype ztype)
{
	switch (ztype) {
	case ZONEFS_ZTYPE_CNV:
		return "cnv";
	case ZONEFS_ZTYPE_SEQ:
		return "seq";
	default:
		WARN_ON_ONCE(1);
		return "???";
	}
}

/*
 * Manage the active zone count.
 */
static void zonefs_account_active(struct super_block *sb,
				  struct zonefs_zone *z)
{
	struct zonefs_sb_info *sbi = ZONEFS_SB(sb);

	if (zonefs_zone_is_cnv(z))
		return;

	/*
	 * For zones that transitioned to the offline or readonly condition,
	 * we only need to clear the active state.
	 */
	if (z->z_flags & (ZONEFS_ZONE_OFFLINE | ZONEFS_ZONE_READONLY))
		goto out