From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 fs/xfs/xfs_trans_inode.c | 135 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 135 insertions(+)
 create mode 100644 fs/xfs/xfs_trans_inode.c

(limited to 'fs/xfs/xfs_trans_inode.c')

diff --git a/fs/xfs/xfs_trans_inode.c b/fs/xfs/xfs_trans_inode.c
new file mode 100644
index 000000000..17280cd71
--- /dev/null
+++ b/fs/xfs/xfs_trans_inode.c
@@ -0,0 +1,135 @@
+/*
+ * 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
+ */
+#include "xfs.h"
+#include "xfs_fs.h"
+#include "xfs_shared.h"
+#include "xfs_format.h"
+#include "xfs_log_format.h"
+#include "xfs_trans_resv.h"
+#include "xfs_mount.h"
+#include "xfs_inode.h"
+#include "xfs_trans.h"
+#include "xfs_trans_priv.h"
+#include "xfs_inode_item.h"
+#include "xfs_trace.h"
+
+/*
+ * Add a locked inode to the transaction.
+ *
+ * The inode must be locked, and it cannot be associated with any transaction.
+ * If lock_flags is non-zero the inode will be unlocked on transaction commit.
+ */
+void
+xfs_trans_ijoin(
+	struct xfs_trans	*tp,
+	struct xfs_inode	*ip,
+	uint			lock_flags)
+{
+	xfs_inode_log_item_t	*iip;
+
+	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
+	if (ip->i_itemp == NULL)
+		xfs_inode_item_init(ip, ip->i_mount);
+	iip = ip->i_itemp;
+
+	ASSERT(iip->ili_lock_flags == 0);
+	iip->ili_lock_flags = lock_flags;
+
+	/*
+	 * Get a log_item_desc to point at the new item.
+	 */
+	xfs_trans_add_item(tp, &iip->ili_item);
+}
+
+/*
+ * Transactional inode timestamp update. Requires the inode to be locked and
+ * joined to the transaction supplied. Relies on the transaction subsystem to
+ * track dirty state and update/writeback the inode accordingly.
+ */
+void
+xfs_trans_ichgtime(
+	struct xfs_trans	*tp,
+	struct xfs_inode	*ip,
+	int			flags)
+{
+	struct inode		*inode = VFS_I(ip);
+	struct timespec		tv;
+
+	ASSERT(tp);
+	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
+
+	tv = current_fs_time(inode->i_sb);
+
+	if ((flags & XFS_ICHGTIME_MOD) &&
+	    !timespec_equal(&inode->i_mtime, &tv)) {
+		inode->i_mtime = tv;
+		ip->i_d.di_mtime.t_sec = tv.tv_sec;
+		ip->i_d.di_mtime.t_nsec = tv.tv_nsec;
+	}
+	if ((flags & XFS_ICHGTIME_CHG) &&
+	    !timespec_equal(&inode->i_ctime, &tv)) {
+		inode->i_ctime = tv;
+		ip->i_d.di_ctime.t_sec = tv.tv_sec;
+		ip->i_d.di_ctime.t_nsec = tv.tv_nsec;
+	}
+}
+
+/*
+ * This is called to mark the fields indicated in fieldmask as needing
+ * to be logged when the transaction is committed.  The inode must
+ * already be associated with the given transaction.
+ *
+ * The values for fieldmask are defined in xfs_inode_item.h.  We always
+ * log all of the core inode if any of it has changed, and we always log
+ * all of the inline data/extents/b-tree root if any of them has changed.
+ */
+void
+xfs_trans_log_inode(
+	xfs_trans_t	*tp,
+	xfs_inode_t	*ip,
+	uint		flags)
+{
+	ASSERT(ip->i_itemp != NULL);
+	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
+
+	/*
+	 * First time we log the inode in a transaction, bump the inode change
+	 * counter if it is configured for this to occur. We don't use
+	 * inode_inc_version() because there is no need for extra locking around
+	 * i_version as we already hold the inode locked exclusively for
+	 * metadata modification.
+	 */
+	if (!(ip->i_itemp->ili_item.li_desc->lid_flags & XFS_LID_DIRTY) &&
+	    IS_I_VERSION(VFS_I(ip))) {
+		ip->i_d.di_changecount = ++VFS_I(ip)->i_version;
+		flags |= XFS_ILOG_CORE;
+	}
+
+	tp->t_flags |= XFS_TRANS_DIRTY;
+	ip->i_itemp->ili_item.li_desc->lid_flags |= XFS_LID_DIRTY;
+
+	/*
+	 * Always OR in the bits from the ili_last_fields field.
+	 * This is to coordinate with the xfs_iflush() and xfs_iflush_done()
+	 * routines in the eventual clearing of the ili_fields bits.
+	 * See the big comment in xfs_iflush() for an explanation of
+	 * this coordination mechanism.
+	 */
+	flags |= ip->i_itemp->ili_last_fields;
+	ip->i_itemp->ili_fields |= flags;
+}
-- 
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