+ return bhv_next_vfs_mount(BHV_NEXT(bhv), args, cr);
+}
+
+/*
+ * Directory tree accounting is implemented using project quotas, where
+ * the project identifier is inherited from parent directories.
+ * A statvfs (df, etc.) of a directory that is using project quota should
+ * return a statvfs of the project, not the entire filesystem.
+ * This makes such trees appear as if they are filesystems in themselves.
+ */
+STATIC int
+xfs_qm_statvfs(
+ struct bhv_desc *bhv,
+ bhv_statvfs_t *statp,
+ struct bhv_vnode *vnode)
+{
+ xfs_mount_t *mp;
+ xfs_inode_t *ip;
+ xfs_dquot_t *dqp;
+ xfs_disk_dquot_t *dp;
+ __uint64_t limit;
+ int error;
+
+ error = bhv_next_vfs_statvfs(BHV_NEXT(bhv), statp, vnode);
+ if (error || !vnode)
+ return error;
+
+ mp = xfs_vfstom(bhvtovfs(bhv));
+ ip = xfs_vtoi(vnode);
+
+ if (!(ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
+ return 0;
+ if (!(mp->m_qflags & XFS_PQUOTA_ACCT))
+ return 0;
+ if (!(mp->m_qflags & XFS_OQUOTA_ENFD))
+ return 0;
+
+ if (xfs_qm_dqget(mp, NULL, ip->i_d.di_projid, XFS_DQ_PROJ, 0, &dqp))
+ return 0;
+ dp = &dqp->q_core;
+
+ limit = dp->d_blk_softlimit ?
+ be64_to_cpu(dp->d_blk_softlimit) :
+ be64_to_cpu(dp->d_blk_hardlimit);
+ if (limit && statp->f_blocks > limit) {
+ statp->f_blocks = limit;
+ statp->f_bfree =
+ (statp->f_blocks > be64_to_cpu(dp->d_bcount)) ?
+ (statp->f_blocks - be64_to_cpu(dp->d_bcount)) : 0;
+ }
+
+ limit = dp->d_ino_softlimit ?
+ be64_to_cpu(dp->d_ino_softlimit) :
+ be64_to_cpu(dp->d_ino_hardlimit);
+ if (limit && statp->f_files > limit) {
+ statp->f_files = limit;
+ statp->f_ffree =
+ (statp->f_files > be64_to_cpu(dp->d_icount)) ?
+ (statp->f_ffree - be64_to_cpu(dp->d_icount)) : 0;
+ }
+
+ xfs_qm_dqput(dqp);
+ return 0;