Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 174 insertions, 0 deletions

diff --git a/kernel/fs/xfs/xfs_qm.h b/kernel/fs/xfs/xfs_qm.h
new file mode 100644
index 000000000..996a04064
--- /dev/null
+++ b/kernel/fs/xfs/xfs_qm.h
@@ -0,0 +1,174 @@
+/*
+ * Copyright (c) 2000-2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#ifndef __XFS_QM_H__
+#define __XFS_QM_H__
+
+#include "xfs_dquot_item.h"
+#include "xfs_dquot.h"
+
+struct xfs_inode;
+
+extern struct kmem_zone	*xfs_qm_dqtrxzone;
+
+/*
+ * Number of bmaps that we ask from bmapi when doing a quotacheck.
+ * We make this restriction to keep the memory usage to a minimum.
+ */
+#define XFS_DQITER_MAP_SIZE	10
+
+#define XFS_IS_DQUOT_UNINITIALIZED(dqp) ( \
+	!dqp->q_core.d_blk_hardlimit && \
+	!dqp->q_core.d_blk_softlimit && \
+	!dqp->q_core.d_rtb_hardlimit && \
+	!dqp->q_core.d_rtb_softlimit && \
+	!dqp->q_core.d_ino_hardlimit && \
+	!dqp->q_core.d_ino_softlimit && \
+	!dqp->q_core.d_bcount && \
+	!dqp->q_core.d_rtbcount && \
+	!dqp->q_core.d_icount)
+
+/*
+ * This defines the unit of allocation of dquots.
+ * Currently, it is just one file system block, and a 4K blk contains 30
+ * (136 * 30 = 4080) dquots. It's probably not worth trying to make
+ * this more dynamic.
+ * XXXsup However, if this number is changed, we have to make sure that we don't
+ * implicitly assume that we do allocations in chunks of a single filesystem
+ * block in the dquot/xqm code.
+ */
+#define XFS_DQUOT_CLUSTER_SIZE_FSB	(xfs_filblks_t)1
+
+/*
+ * Various quota information for individual filesystems.
+ * The mount structure keeps a pointer to this.
+ */
+typedef struct xfs_quotainfo {
+	struct radix_tree_root qi_uquota_tree;
+	struct radix_tree_root qi_gquota_tree;
+	struct radix_tree_root qi_pquota_tree;
+	struct mutex qi_tree_lock;
+	struct xfs_inode	*qi_uquotaip;	/* user quota inode */
+	struct xfs_inode	*qi_gquotaip;	/* group quota inode */
+	struct xfs_inode	*qi_pquotaip;	/* project quota inode */
+	struct list_lru	 qi_lru;
+	int		 qi_dquots;
+	time_t		 qi_btimelimit;	 /* limit for blks timer */
+	time_t		 qi_itimelimit;	 /* limit for inodes timer */
+	time_t		 qi_rtbtimelimit;/* limit for rt blks timer */
+	xfs_qwarncnt_t	 qi_bwarnlimit;	 /* limit for blks warnings */
+	xfs_qwarncnt_t	 qi_iwarnlimit;	 /* limit for inodes warnings */
+	xfs_qwarncnt_t	 qi_rtbwarnlimit;/* limit for rt blks warnings */
+	struct mutex	 qi_quotaofflock;/* to serialize quotaoff */
+	xfs_filblks_t	 qi_dqchunklen;	 /* # BBs in a chunk of dqs */
+	uint		 qi_dqperchunk;	 /* # ondisk dqs in above chunk */
+	xfs_qcnt_t	 qi_bhardlimit;	 /* default data blk hard limit */
+	xfs_qcnt_t	 qi_bsoftlimit;	 /* default data blk soft limit */
+	xfs_qcnt_t	 qi_ihardlimit;	 /* default inode count hard limit */
+	xfs_qcnt_t	 qi_isoftlimit;	 /* default inode count soft limit */
+	xfs_qcnt_t	 qi_rtbhardlimit;/* default realtime blk hard limit */
+	xfs_qcnt_t	 qi_rtbsoftlimit;/* default realtime blk soft limit */
+	struct shrinker  qi_shrinker;
+} xfs_quotainfo_t;
+
+static inline struct radix_tree_root *
+xfs_dquot_tree(
+	struct xfs_quotainfo	*qi,
+	int			type)
+{
+	switch (type) {
+	case XFS_DQ_USER:
+		return &qi->qi_uquota_tree;
+	case XFS_DQ_GROUP:
+		return &qi->qi_gquota_tree;
+	case XFS_DQ_PROJ:
+		return &qi->qi_pquota_tree;
+	default:
+		ASSERT(0);
+	}
+	return NULL;
+}
+
+static inline struct xfs_inode *
+xfs_dq_to_quota_inode(struct xfs_dquot *dqp)
+{
+	switch (dqp->dq_flags & XFS_DQ_ALLTYPES) {
+	case XFS_DQ_USER:
+		return dqp->q_mount->m_quotainfo->qi_uquotaip;
+	case XFS_DQ_GROUP:
+		return dqp->q_mount->m_quotainfo->qi_gquotaip;
+	case XFS_DQ_PROJ:
+		return dqp->q_mount->m_quotainfo->qi_pquotaip;
+	default:
+		ASSERT(0);
+	}
+	return NULL;
+}
+
+extern void	xfs_trans_mod_dquot(struct xfs_trans *,
+					struct xfs_dquot *, uint, long);
+extern int	xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
+			struct xfs_mount *, struct xfs_dquot *,
+			struct xfs_dquot *, struct xfs_dquot *,
+			long, long, uint);
+extern void	xfs_trans_dqjoin(struct xfs_trans *, struct xfs_dquot *);
+extern void	xfs_trans_log_dquot(struct xfs_trans *, struct xfs_dquot *);
+
+/*
+ * We keep the usr, grp, and prj dquots separately so that locking will be
+ * easier to do at commit time. All transactions that we know of at this point
+ * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
+ */
+enum {
+	XFS_QM_TRANS_USR = 0,
+	XFS_QM_TRANS_GRP,
+	XFS_QM_TRANS_PRJ,
+	XFS_QM_TRANS_DQTYPES
+};
+#define XFS_QM_TRANS_MAXDQS		2
+struct xfs_dquot_acct {
+	struct xfs_dqtrx	dqs[XFS_QM_TRANS_DQTYPES][XFS_QM_TRANS_MAXDQS];
+};
+
+/*
+ * Users are allowed to have a usage exceeding their softlimit for
+ * a period this long.
+ */
+#define XFS_QM_BTIMELIMIT	(7 * 24*60*60)          /* 1 week */
+#define XFS_QM_RTBTIMELIMIT	(7 * 24*60*60)          /* 1 week */
+#define XFS_QM_ITIMELIMIT	(7 * 24*60*60)          /* 1 week */
+
+#define XFS_QM_BWARNLIMIT	5
+#define XFS_QM_IWARNLIMIT	5
+#define XFS_QM_RTBWARNLIMIT	5
+
+extern void		xfs_qm_destroy_quotainfo(struct xfs_mount *);
+
+/* dquot stuff */
+extern void		xfs_qm_dqpurge_all(struct xfs_mount *, uint);
+extern void		xfs_qm_dqrele_all_inodes(struct xfs_mount *, uint);
+
+/* quota ops */
+extern int		xfs_qm_scall_trunc_qfiles(struct xfs_mount *, uint);
+extern int		xfs_qm_scall_getquota(struct xfs_mount *, xfs_dqid_t,
+					uint, struct qc_dqblk *);
+extern int		xfs_qm_scall_setqlim(struct xfs_mount *, xfs_dqid_t, uint,
+					struct qc_dqblk *);
+extern int		xfs_qm_scall_quotaon(struct xfs_mount *, uint);
+extern int		xfs_qm_scall_quotaoff(struct xfs_mount *, uint);
+
+#endif /* __XFS_QM_H__ */