Add the rt linux 4.1.3-rt3 as base

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

diff --git a/kernel/fs/xfs/xfs_trans_extfree.c b/kernel/fs/xfs/xfs_trans_extfree.c
new file mode 100644 (file)
index 0000000..284397d
--- /dev/null
+++ b/kernel/fs/xfs/xfs_trans_extfree.c
@@ -0,0 +1,133 @@
+/*
+ * 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_trans.h"
+#include "xfs_trans_priv.h"
+#include "xfs_extfree_item.h"
+
+/*
+ * This routine is called to allocate an "extent free intention"
+ * log item that will hold nextents worth of extents.  The
+ * caller must use all nextents extents, because we are not
+ * flexible about this at all.
+ */
+xfs_efi_log_item_t *
+xfs_trans_get_efi(xfs_trans_t  *tp,
+                 uint          nextents)
+{
+       xfs_efi_log_item_t      *efip;
+
+       ASSERT(tp != NULL);
+       ASSERT(nextents > 0);
+
+       efip = xfs_efi_init(tp->t_mountp, nextents);
+       ASSERT(efip != NULL);
+
+       /*
+        * Get a log_item_desc to point at the new item.
+        */
+       xfs_trans_add_item(tp, &efip->efi_item);
+       return efip;
+}
+
+/*
+ * This routine is called to indicate that the described
+ * extent is to be logged as needing to be freed.  It should
+ * be called once for each extent to be freed.
+ */
+void
+xfs_trans_log_efi_extent(xfs_trans_t           *tp,
+                        xfs_efi_log_item_t     *efip,
+                        xfs_fsblock_t          start_block,
+                        xfs_extlen_t           ext_len)
+{
+       uint                    next_extent;
+       xfs_extent_t            *extp;
+
+       tp->t_flags |= XFS_TRANS_DIRTY;
+       efip->efi_item.li_desc->lid_flags |= XFS_LID_DIRTY;
+
+       /*
+        * atomic_inc_return gives us the value after the increment;
+        * we want to use it as an array index so we need to subtract 1 from
+        * it.
+        */
+       next_extent = atomic_inc_return(&efip->efi_next_extent) - 1;
+       ASSERT(next_extent < efip->efi_format.efi_nextents);
+       extp = &(efip->efi_format.efi_extents[next_extent]);
+       extp->ext_start = start_block;
+       extp->ext_len = ext_len;
+}
+
+
+/*
+ * This routine is called to allocate an "extent free done"
+ * log item that will hold nextents worth of extents.  The
+ * caller must use all nextents extents, because we are not
+ * flexible about this at all.
+ */
+xfs_efd_log_item_t *
+xfs_trans_get_efd(xfs_trans_t          *tp,
+                 xfs_efi_log_item_t    *efip,
+                 uint                  nextents)
+{
+       xfs_efd_log_item_t      *efdp;
+
+       ASSERT(tp != NULL);
+       ASSERT(nextents > 0);
+
+       efdp = xfs_efd_init(tp->t_mountp, efip, nextents);
+       ASSERT(efdp != NULL);
+
+       /*
+        * Get a log_item_desc to point at the new item.
+        */
+       xfs_trans_add_item(tp, &efdp->efd_item);
+       return efdp;
+}
+
+/*
+ * This routine is called to indicate that the described
+ * extent is to be logged as having been freed.  It should
+ * be called once for each extent freed.
+ */
+void
+xfs_trans_log_efd_extent(xfs_trans_t           *tp,
+                        xfs_efd_log_item_t     *efdp,
+                        xfs_fsblock_t          start_block,
+                        xfs_extlen_t           ext_len)
+{
+       uint                    next_extent;
+       xfs_extent_t            *extp;
+
+       tp->t_flags |= XFS_TRANS_DIRTY;
+       efdp->efd_item.li_desc->lid_flags |= XFS_LID_DIRTY;
+
+       next_extent = efdp->efd_next_extent;
+       ASSERT(next_extent < efdp->efd_format.efd_nextents);
+       extp = &(efdp->efd_format.efd_extents[next_extent]);
+       extp->ext_start = start_block;
+       extp->ext_len = ext_len;
+       efdp->efd_next_extent++;
+}