Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / xfs / xfs_trans_inode.c

diff --git a/kernel/fs/xfs/xfs_trans_inode.c b/kernel/fs/xfs/xfs_trans_inode.c
new file mode 100644 (file)
index 0000000..17280cd
--- /dev/null
+++ b/kernel/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;
+}