Implement deferred versions of the inode block map/unmap functions.
These will be used in subsequent patches to make reflink operations
atomic.
[Plumb in bmap deferred op log items.]
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
include/xfs_trans.h | 1
libxfs/defer_item.c | 107 +++++++++++++++++++++++++++++++++++++++++++++++++++
libxfs/init.c | 1
3 files changed, 109 insertions(+)
diff --git a/include/xfs_trans.h b/include/xfs_trans.h
index 739a792..44deebb 100644
--- a/include/xfs_trans.h
+++ b/include/xfs_trans.h
@@ -148,5 +148,6 @@ 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);
+void xfs_bmap_update_init_defer_op(void);
#endif /* __XFS_TRANS_H__ */
diff --git a/libxfs/defer_item.c b/libxfs/defer_item.c
index 1b7d037..49bf7f8 100644
--- a/libxfs/defer_item.c
+++ b/libxfs/defer_item.c
@@ -32,6 +32,8 @@
#include "xfs_alloc.h"
#include "xfs_rmap.h"
#include "xfs_refcount.h"
+#include "xfs_bmap.h"
+#include "xfs_inode.h"
/* Dummy defer item ops, since we don't do logging. */
@@ -387,3 +389,108 @@ xfs_refcount_update_init_defer_op(void)
{
xfs_defer_init_op_type(&xfs_refcount_update_defer_type);
}
+
+/* Inode Block Mapping */
+
+/* Sort bmap intents by inode. */
+static int
+xfs_bmap_update_diff_items(
+ void *priv,
+ struct list_head *a,
+ struct list_head *b)
+{
+ struct xfs_bmap_intent *ba;
+ struct xfs_bmap_intent *bb;
+
+ ba = container_of(a, struct xfs_bmap_intent, bi_list);
+ bb = container_of(b, struct xfs_bmap_intent, bi_list);
+ return ba->bi_owner->i_ino - bb->bi_owner->i_ino;
+}
+
+/* Get an BUI. */
+STATIC void *
+xfs_bmap_update_create_intent(
+ struct xfs_trans *tp,
+ unsigned int count)
+{
+ return NULL;
+}
+
+/* Log bmap updates in the intent item. */
+STATIC void
+xfs_bmap_update_log_item(
+ struct xfs_trans *tp,
+ void *intent,
+ struct list_head *item)
+{
+}
+
+/* Get an BUD so we can process all the deferred rmap updates. */
+STATIC void *
+xfs_bmap_update_create_done(
+ struct xfs_trans *tp,
+ void *intent,
+ unsigned int count)
+{
+ return NULL;
+}
+
+/* Process a deferred rmap update. */
+STATIC int
+xfs_bmap_update_finish_item(
+ struct xfs_trans *tp,
+ struct xfs_defer_ops *dop,
+ struct list_head *item,
+ void *done_item,
+ void **state)
+{
+ struct xfs_bmap_intent *bmap;
+ int error;
+
+ bmap = container_of(item, struct xfs_bmap_intent, bi_list);
+ error = xfs_bmap_finish_one(tp, dop,
+ bmap->bi_owner,
+ bmap->bi_type, bmap->bi_whichfork,
+ bmap->bi_bmap.br_startoff,
+ bmap->bi_bmap.br_startblock,
+ bmap->bi_bmap.br_blockcount,
+ bmap->bi_bmap.br_state);
+ kmem_free(bmap);
+ return error;
+}
+
+/* Abort all pending BUIs. */
+STATIC void
+xfs_bmap_update_abort_intent(
+ void *intent)
+{
+}
+
+/* Cancel a deferred rmap update. */
+STATIC void
+xfs_bmap_update_cancel_item(
+ struct list_head *item)
+{
+ struct xfs_bmap_intent *bmap;
+
+ bmap = container_of(item, struct xfs_bmap_intent, bi_list);
+ kmem_free(bmap);
+}
+
+static const struct xfs_defer_op_type xfs_bmap_update_defer_type = {
+ .type = XFS_DEFER_OPS_TYPE_BMAP,
+ .diff_items = xfs_bmap_update_diff_items,
+ .create_intent = xfs_bmap_update_create_intent,
+ .abort_intent = xfs_bmap_update_abort_intent,
+ .log_item = xfs_bmap_update_log_item,
+ .create_done = xfs_bmap_update_create_done,
+ .finish_item = xfs_bmap_update_finish_item,
+ .cancel_item = xfs_bmap_update_cancel_item,
+};
+
+/* Register the deferred op type. */
+void
+xfs_bmap_update_init_defer_op(void)
+{
+ xfs_defer_init_op_type(&xfs_bmap_update_defer_type);
+}
diff --git a/libxfs/init.c b/libxfs/init.c
index 9d9e928..3721589 100644
--- a/libxfs/init.c
+++ b/libxfs/init.c
@@ -269,6 +269,7 @@ libxfs_init(libxfs_init_t *a)
xfs_extent_free_init_defer_op();
xfs_rmap_update_init_defer_op();
xfs_refcount_update_init_defer_op();
+ xfs_bmap_update_init_defer_op();
radix_tree_init();
--
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