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-rw-r--r--fs/xfs/xfs_trans_extfree.c156
1 files changed, 156 insertions, 0 deletions
diff --git a/fs/xfs/xfs_trans_extfree.c b/fs/xfs/xfs_trans_extfree.c
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+/*
+ * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 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.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like. Any license provided herein, whether implied or
+ * otherwise, applies only to this software file. Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA 94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+
+#include "xfs.h"
+#include "xfs_macros.h"
+#include "xfs_types.h"
+#include "xfs_inum.h"
+#include "xfs_log.h"
+#include "xfs_trans.h"
+#include "xfs_sb.h"
+#include "xfs_dir.h"
+#include "xfs_dmapi.h"
+#include "xfs_mount.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.
+ */
+ (void) xfs_trans_add_item(tp, (xfs_log_item_t*)efip);
+
+ 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)
+{
+ xfs_log_item_desc_t *lidp;
+ uint next_extent;
+ xfs_extent_t *extp;
+
+ lidp = xfs_trans_find_item(tp, (xfs_log_item_t*)efip);
+ ASSERT(lidp != NULL);
+
+ tp->t_flags |= XFS_TRANS_DIRTY;
+ lidp->lid_flags |= XFS_LID_DIRTY;
+
+ next_extent = efip->efi_next_extent;
+ 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;
+ efip->efi_next_extent++;
+}
+
+
+/*
+ * 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.
+ */
+ (void) xfs_trans_add_item(tp, (xfs_log_item_t*)efdp);
+
+ 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)
+{
+ xfs_log_item_desc_t *lidp;
+ uint next_extent;
+ xfs_extent_t *extp;
+
+ lidp = xfs_trans_find_item(tp, (xfs_log_item_t*)efdp);
+ ASSERT(lidp != NULL);
+
+ tp->t_flags |= XFS_TRANS_DIRTY;
+ lidp->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++;
+}
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