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Commit e21c2855 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs: introduce f2fs_statfs_project 



This patch introduces f2fs_statfs_project, it enables to show usage
status of directory tree which is limited with project quota.

Signed-off-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent f5938dfc

fs/f2fs/super.c

+48 −0
Original line number Diff line number Diff line
@@ -697,6 +697,48 @@ static int f2fs_unfreeze(struct super_block *sb) 
	return 0;

}



#ifdef CONFIG_QUOTA

static int f2fs_statfs_project(struct super_block *sb,

				kprojid_t projid, struct kstatfs *buf)

{

	struct kqid qid;

	struct dquot *dquot;

	u64 limit;

	u64 curblock;



	qid = make_kqid_projid(projid);

	dquot = dqget(sb, qid);

	if (IS_ERR(dquot))

		return PTR_ERR(dquot);

	spin_lock(&dq_data_lock);



	limit = (dquot->dq_dqb.dqb_bsoftlimit ?

		 dquot->dq_dqb.dqb_bsoftlimit :

		 dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits;

	if (limit && buf->f_blocks > limit) {

		curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits;

		buf->f_blocks = limit;

		buf->f_bfree = buf->f_bavail =

			(buf->f_blocks > curblock) ?

			 (buf->f_blocks - curblock) : 0;

	}



	limit = dquot->dq_dqb.dqb_isoftlimit ?

		dquot->dq_dqb.dqb_isoftlimit :

		dquot->dq_dqb.dqb_ihardlimit;

	if (limit && buf->f_files > limit) {

		buf->f_files = limit;

		buf->f_ffree =

			(buf->f_files > dquot->dq_dqb.dqb_curinodes) ?

			 (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;

	}



	spin_unlock(&dq_data_lock);

	dqput(dquot);

	return 0;

}

#endif



static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)

{

	struct super_block *sb = dentry->d_sb;
@@ -732,6 +774,12 @@ static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) 
	buf->f_fsid.val[0] = (u32)id;

	buf->f_fsid.val[1] = (u32)(id >> 32);



#ifdef CONFIG_QUOTA

	if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&

			sb_has_quota_limits_enabled(sb, PRJQUOTA)) {

		f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);

	}

#endif

	return 0;

}