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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /fs/xfs/xfs_trans_extfree.c
Initial import
Diffstat (limited to 'fs/xfs/xfs_trans_extfree.c')
-rw-r--r--fs/xfs/xfs_trans_extfree.c133
1 files changed, 133 insertions, 0 deletions
diff --git a/fs/xfs/xfs_trans_extfree.c b/fs/xfs/xfs_trans_extfree.c
new file mode 100644
index 000000000..284397dd7
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+++ b/fs/xfs/xfs_trans_extfree.c
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+/*
+ * 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++;
+}