1 // SPDX-License-Identifier: GPL-2.0-or-later
23  *	ip	- pointer to in-core inode
24  *	blkno	- starting block number to be trimmed (0..N)
25  *	nblocks	- number of blocks to be trimmed
32 void jfs_issue_discard(struct inode *ip, u64 blkno, u64 nblocks)  in jfs_issue_discard()  argument
34 	struct super_block *sb = ip->i_sb;  in jfs_issue_discard()
58  *	ip	- pointer to in-core inode;
59  *	range	- the range, given by user space
62  *	0	- success
63  *	-EIO	- i/o error
65 int jfs_ioc_trim(struct inode *ip, struct fstrim_range *range)  in jfs_ioc_trim()  argument
67 	struct inode *ipbmap = JFS_SBI(ip->i_sb)->ipbmap;  in jfs_ioc_trim()
68 	struct bmap *bmp = JFS_SBI(ip->i_sb)->bmap;  in jfs_ioc_trim()
69 	struct super_block *sb = ipbmap->i_sb;  in jfs_ioc_trim()
80 	start = range->start >> sb->s_blocksize_bits;  in jfs_ioc_trim()
81 	end = start + (range->len >> sb->s_blocksize_bits) - 1;  in jfs_ioc_trim()
82 	minlen = range->minlen >> sb->s_blocksize_bits;  in jfs_ioc_trim()
86 	if (minlen > bmp->db_agsize ||  in jfs_ioc_trim()
87 	    start >= bmp->db_mapsize ||  in jfs_ioc_trim()
88 	    range->len < sb->s_blocksize)  in jfs_ioc_trim()
89 		return -EINVAL;  in jfs_ioc_trim()
91 	if (end >= bmp->db_mapsize)  in jfs_ioc_trim()
92 		end = bmp->db_mapsize - 1;  in jfs_ioc_trim()
97 	agno = BLKTOAG(start, JFS_SBI(ip->i_sb));  in jfs_ioc_trim()
98 	agno_end = BLKTOAG(end, JFS_SBI(ip->i_sb));  in jfs_ioc_trim()
100 		trimmed += dbDiscardAG(ip, agno, minlen);  in jfs_ioc_trim()
103 	range->len = trimmed << sb->s_blocksize_bits;  in jfs_ioc_trim()