xfs: Add support for the Q_XGETQSTATV

For XFS, add support for Q_XGETQSTATV quotactl command.

Signed-off-by: Chandra Seetharaman <[e-mail]>
Reviewed-by: Rich Johnston <[e-mail]>
Signed-off-by: Ben Myers <[e-mail]>

fs/xfs/xfs_qm.h

···
 					struct fs_disk_quota *);
 extern int		xfs_qm_scall_getqstat(struct xfs_mount *,
 					struct fs_quota_stat *);
+extern int		xfs_qm_scall_getqstatv(struct xfs_mount *,
+					struct fs_quota_statv *);
 extern int		xfs_qm_scall_quotaon(struct xfs_mount *, uint);
 extern int		xfs_qm_scall_quotaoff(struct xfs_mount *, uint);
 

fs/xfs/xfs_qm_syscalls.c

···
 
 /*
  * Return quota status information, such as uquota-off, enforcements, etc.
+ * for Q_XGETQSTAT command.
  */
 int
 xfs_qm_scall_getqstat(
···
 		out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino;
 		out->qs_gquota.qfs_nblks = pip->i_d.di_nblocks;
 		out->qs_gquota.qfs_nextents = pip->i_d.di_nextents;
+		if (temppqip)
+			IRELE(pip);
+	}
+	if (q) {
+		out->qs_incoredqs = q->qi_dquots;
+		out->qs_btimelimit = q->qi_btimelimit;
+		out->qs_itimelimit = q->qi_itimelimit;
+		out->qs_rtbtimelimit = q->qi_rtbtimelimit;
+		out->qs_bwarnlimit = q->qi_bwarnlimit;
+		out->qs_iwarnlimit = q->qi_iwarnlimit;
+	}
+	return 0;
+}
+
+/*
+ * Return quota status information, such as uquota-off, enforcements, etc.
+ * for Q_XGETQSTATV command, to support separate project quota field.
+ */
+int
+xfs_qm_scall_getqstatv(
+	struct xfs_mount	*mp,
+	struct fs_quota_statv	*out)
+{
+	struct xfs_quotainfo	*q = mp->m_quotainfo;
+	struct xfs_inode	*uip = NULL;
+	struct xfs_inode	*gip = NULL;
+	struct xfs_inode	*pip = NULL;
+	bool                    tempuqip = false;
+	bool                    tempgqip = false;
+	bool                    temppqip = false;
+
+	if (!xfs_sb_version_hasquota(&mp->m_sb)) {
+		out->qs_uquota.qfs_ino = NULLFSINO;
+		out->qs_gquota.qfs_ino = NULLFSINO;
+		out->qs_pquota.qfs_ino = NULLFSINO;
+		return (0);
+	}
+
+	out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags &
+							(XFS_ALL_QUOTA_ACCT|
+							 XFS_ALL_QUOTA_ENFD));
+	out->qs_uquota.qfs_ino = mp->m_sb.sb_uquotino;
+	out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino;
+	out->qs_pquota.qfs_ino = mp->m_sb.sb_pquotino;
+
+	if (q) {
+		uip = q->qi_uquotaip;
+		gip = q->qi_gquotaip;
+		pip = q->qi_pquotaip;
+	}
+	if (!uip && mp->m_sb.sb_uquotino != NULLFSINO) {
+		if (xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
+					0, 0, &uip) == 0)
+			tempuqip = true;
+	}
+	if (!gip && mp->m_sb.sb_gquotino != NULLFSINO) {
+		if (xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
+					0, 0, &gip) == 0)
+			tempgqip = true;
+	}
+	if (!pip && mp->m_sb.sb_pquotino != NULLFSINO) {
+		if (xfs_iget(mp, NULL, mp->m_sb.sb_pquotino,
+					0, 0, &pip) == 0)
+			temppqip = true;
+	}
+	if (uip) {
+		out->qs_uquota.qfs_nblks = uip->i_d.di_nblocks;
+		out->qs_uquota.qfs_nextents = uip->i_d.di_nextents;
+		if (tempuqip)
+			IRELE(uip);
+	}
+
+	if (gip) {
+		out->qs_gquota.qfs_nblks = gip->i_d.di_nblocks;
+		out->qs_gquota.qfs_nextents = gip->i_d.di_nextents;
+		if (tempgqip)
+			IRELE(gip);
+	}
+	if (pip) {
+		out->qs_pquota.qfs_nblks = pip->i_d.di_nblocks;
+		out->qs_pquota.qfs_nextents = pip->i_d.di_nextents;
 		if (temppqip)
 			IRELE(pip);
 	}

fs/xfs/xfs_quotaops.c

···
 }
 
 STATIC int
+xfs_fs_get_xstatev(
+	struct super_block	*sb,
+	struct fs_quota_statv	*fqs)
+{
+	struct xfs_mount	*mp = XFS_M(sb);
+
+	if (!XFS_IS_QUOTA_RUNNING(mp))
+		return -ENOSYS;
+	return -xfs_qm_scall_getqstatv(mp, fqs);
+}
+
+STATIC int
 xfs_fs_set_xstate(
 	struct super_block	*sb,
 	unsigned int		uflags,
···
 }
 
 const struct quotactl_ops xfs_quotactl_operations = {
+	.get_xstatev		= xfs_fs_get_xstatev,
 	.get_xstate		= xfs_fs_get_xstate,
 	.set_xstate		= xfs_fs_set_xstate,
 	.get_dqblk		= xfs_fs_get_dqblk,