Plumb in the upper level interface to schedule and finish deferred
refcount operations via the deferred ops mechanism.
[Plumb in refcount deferred op log items.]
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
include/xfs_trans.h | 1
libxfs/defer_item.c | 130 +++++++++++++++++++++++++++++++++++++++++++++++++++
libxfs/init.c | 1
3 files changed, 132 insertions(+)
diff --git a/include/xfs_trans.h b/include/xfs_trans.h
index ab5d59b..739a792 100644
--- a/include/xfs_trans.h
+++ b/include/xfs_trans.h
@@ -147,5 +147,6 @@ libxfs_trans_read_buf(
void xfs_extent_free_init_defer_op(void);
void xfs_rmap_update_init_defer_op(void);
+void xfs_refcount_update_init_defer_op(void);
#endif /* __XFS_TRANS_H__ */
diff --git a/libxfs/defer_item.c b/libxfs/defer_item.c
index f60a11b..1b7d037 100644
--- a/libxfs/defer_item.c
+++ b/libxfs/defer_item.c
@@ -31,6 +31,7 @@
#include "xfs_bmap.h"
#include "xfs_alloc.h"
#include "xfs_rmap.h"
+#include "xfs_refcount.h"
/* Dummy defer item ops, since we don't do logging. */
@@ -257,3 +258,132 @@ xfs_rmap_update_init_defer_op(void)
{
xfs_defer_init_op_type(&xfs_rmap_update_defer_type);
}
+
+/* Reference Counting */
+
+/* Sort refcount intents by AG. */
+static int
+xfs_refcount_update_diff_items(
+ void *priv,
+ struct list_head *a,
+ struct list_head *b)
+{
+ struct xfs_mount *mp = priv;
+ struct xfs_refcount_intent *ra;
+ struct xfs_refcount_intent *rb;
+
+ ra = container_of(a, struct xfs_refcount_intent, ri_list);
+ rb = container_of(b, struct xfs_refcount_intent, ri_list);
+ return XFS_FSB_TO_AGNO(mp, ra->ri_startblock) -
+ XFS_FSB_TO_AGNO(mp, rb->ri_startblock);
+}
+
+/* Get an CUI. */
+STATIC void *
+xfs_refcount_update_create_intent(
+ struct xfs_trans *tp,
+ unsigned int count)
+{
+ return NULL;
+}
+
+/* Log refcount updates in the intent item. */
+STATIC void
+xfs_refcount_update_log_item(
+ struct xfs_trans *tp,
+ void *intent,
+ struct list_head *item)
+{
+}
+
+/* Get an CUD so we can process all the deferred refcount updates. */
+STATIC void *
+xfs_refcount_update_create_done(
+ struct xfs_trans *tp,
+ void *intent,
+ unsigned int count)
+{
+ return NULL;
+}
+
+/* Process a deferred refcount update. */
+STATIC int
+xfs_refcount_update_finish_item(
+ struct xfs_trans *tp,
+ struct xfs_defer_ops *dop,
+ struct list_head *item,
+ void *done_item,
+ void **state)
+{
+ struct xfs_refcount_intent *refc;
+ xfs_fsblock_t new_fsb;
+ xfs_extlen_t new_aglen;
+ int error;
+
+ refc = container_of(item, struct xfs_refcount_intent, ri_list);
+ error = xfs_refcount_finish_one(tp, dop,
+ refc->ri_type,
+ refc->ri_startblock,
+ refc->ri_blockcount,
+ &new_fsb, &new_aglen,
+ (struct xfs_btree_cur **)state);
+ /* Did we run out of reservation? Requeue what we didn't finish. */
+ if (!error && new_aglen > 0) {
+ ASSERT(refc->ri_type == XFS_REFCOUNT_INCREASE ||
+ refc->ri_type == XFS_REFCOUNT_DECREASE);
+ refc->ri_startblock = new_fsb;
+ refc->ri_blockcount = new_aglen;
+ return -EAGAIN;
+ }
+ kmem_free(refc);
+ return error;
+}
+
+/* Clean up after processing deferred refcounts. */
+STATIC void
+xfs_refcount_update_finish_cleanup(
+ struct xfs_trans *tp,
+ void *state,
+ int error)
+{
+ struct xfs_btree_cur *rcur = state;
+
+ xfs_refcount_finish_one_cleanup(tp, rcur, error);
+}
+
+/* Abort all pending CUIs. */
+STATIC void
+xfs_refcount_update_abort_intent(
+ void *intent)
+{
+}
+
+/* Cancel a deferred refcount update. */
+STATIC void
+xfs_refcount_update_cancel_item(
+ struct list_head *item)
+{
+ struct xfs_refcount_intent *refc;
+
+ refc = container_of(item, struct xfs_refcount_intent, ri_list);
+ kmem_free(refc);
+}
+
+static const struct xfs_defer_op_type xfs_refcount_update_defer_type = {
+ .type = XFS_DEFER_OPS_TYPE_REFCOUNT,
+ .diff_items = xfs_refcount_update_diff_items,
+ .create_intent = xfs_refcount_update_create_intent,
+ .abort_intent = xfs_refcount_update_abort_intent,
+ .log_item = xfs_refcount_update_log_item,
+ .create_done = xfs_refcount_update_create_done,
+ .finish_item = xfs_refcount_update_finish_item,
+ .finish_cleanup = xfs_refcount_update_finish_cleanup,
+ .cancel_item = xfs_refcount_update_cancel_item,
+};
+
+/* Register the deferred op type. */
+void
+xfs_refcount_update_init_defer_op(void)
+{
+ xfs_defer_init_op_type(&xfs_refcount_update_defer_type);
+}
diff --git a/libxfs/init.c b/libxfs/init.c
index c962d3e..9d9e928 100644
--- a/libxfs/init.c
+++ b/libxfs/init.c
@@ -268,6 +268,7 @@ libxfs_init(libxfs_init_t *a)
xfs_extent_free_init_defer_op();
xfs_rmap_update_init_defer_op();
+ xfs_refcount_update_init_defer_op();
radix_tree_init();
--
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