xfs: log rmap intent items
Provide a mechanism for higher levels to create RUI/RUD items, submit
them to the log, and a stub function to deal with recovered RUI items.
These parts will be connected to the rmapbt in a later patch.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
diff --git a/fs/xfs/xfs_rmap_item.c b/fs/xfs/xfs_rmap_item.c
index 5398b84..fecd1e4 100644
--- a/fs/xfs/xfs_rmap_item.c
+++ b/fs/xfs/xfs_rmap_item.c
@@ -22,6 +22,7 @@
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
+#include "xfs_bit.h"
#include "xfs_mount.h"
#include "xfs_trans.h"
#include "xfs_trans_priv.h"
@@ -457,3 +458,62 @@
return rudp;
}
+
+/*
+ * Process an rmap update intent item that was recovered from the log.
+ * We need to update the rmapbt.
+ */
+int
+xfs_rui_recover(
+ struct xfs_mount *mp,
+ struct xfs_rui_log_item *ruip)
+{
+ int i;
+ int error = 0;
+ struct xfs_map_extent *rmap;
+ xfs_fsblock_t startblock_fsb;
+ bool op_ok;
+
+ ASSERT(!test_bit(XFS_RUI_RECOVERED, &ruip->rui_flags));
+
+ /*
+ * First check the validity of the extents described by the
+ * RUI. If any are bad, then assume that all are bad and
+ * just toss the RUI.
+ */
+ for (i = 0; i < ruip->rui_format.rui_nextents; i++) {
+ rmap = &(ruip->rui_format.rui_extents[i]);
+ startblock_fsb = XFS_BB_TO_FSB(mp,
+ XFS_FSB_TO_DADDR(mp, rmap->me_startblock));
+ switch (rmap->me_flags & XFS_RMAP_EXTENT_TYPE_MASK) {
+ case XFS_RMAP_EXTENT_MAP:
+ case XFS_RMAP_EXTENT_UNMAP:
+ case XFS_RMAP_EXTENT_CONVERT:
+ case XFS_RMAP_EXTENT_ALLOC:
+ case XFS_RMAP_EXTENT_FREE:
+ op_ok = true;
+ break;
+ default:
+ op_ok = false;
+ break;
+ }
+ if (!op_ok || (startblock_fsb == 0) ||
+ (rmap->me_len == 0) ||
+ (startblock_fsb >= mp->m_sb.sb_dblocks) ||
+ (rmap->me_len >= mp->m_sb.sb_agblocks) ||
+ (rmap->me_flags & ~XFS_RMAP_EXTENT_FLAGS)) {
+ /*
+ * This will pull the RUI from the AIL and
+ * free the memory associated with it.
+ */
+ set_bit(XFS_RUI_RECOVERED, &ruip->rui_flags);
+ xfs_rui_release(ruip);
+ return -EIO;
+ }
+ }
+
+ /* XXX: do nothing for now */
+ set_bit(XFS_RUI_RECOVERED, &ruip->rui_flags);
+ xfs_rui_release(ruip);
+ return error;
+}