linux/fs/jfs/jfs_discard.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *   Copyright (C) Tino Reichardt, 2012
 */

#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/blkdev.h>

#include "jfs_incore.h"
#include "jfs_superblock.h"
#include "jfs_discard.h"
#include "jfs_dmap.h"
#include "jfs_debug.h"


/*
 * NAME:	jfs_issue_discard()
 *
 * FUNCTION:	TRIM the specified block range on device, if supported
 *
 * PARAMETERS:
 *	ip	- pointer to in-core inode
 *	blkno	- starting block number to be trimmed (0..N)
 *	nblocks	- number of blocks to be trimmed
 *
 * RETURN VALUES:
 *	none
 *
 * serialization: IREAD_LOCK(ipbmap) held on entry/exit;
 */
void jfs_issue_discard(struct inode *ip, u64 blkno, u64 nblocks)
{ … }

/*
 * NAME:	jfs_ioc_trim()
 *
 * FUNCTION:	attempt to discard (TRIM) all free blocks from the
 *              filesystem.
 *
 * PARAMETERS:
 *	ip	- pointer to in-core inode;
 *	range	- the range, given by user space
 *
 * RETURN VALUES:
 *	0	- success
 *	-EIO	- i/o error
 */
int jfs_ioc_trim(struct inode *ip, struct fstrim_range *range)
{ … }