maple_tree: print store type in mas_dump()

Knowing the store type of the maple state could be helpful for debugging.
Have mas_dump() print mas->store_type.

Link: https://lkml.kernel.org/r/20240814161944.55347-9-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index e01e05be6301da166b79d64ef072d0be7ac3f556..a1689fc6227b7515e1579761d94daba3e9e76f9a 100644 (file)
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -7760,6 +7760,40 @@ void mas_dump(const struct ma_state *mas)
                break;
        }
 
+       pr_err("Store Type: ");
+       switch (mas->store_type) {
+       case wr_invalid:
+               pr_err("invalid store type\n");
+               break;
+       case wr_new_root:
+               pr_err("new_root\n");
+               break;
+       case wr_store_root:
+               pr_err("store_root\n");
+               break;
+       case wr_exact_fit:
+               pr_err("exact_fit\n");
+               break;
+       case wr_split_store:
+               pr_err("split_store\n");
+               break;
+       case wr_slot_store:
+               pr_err("slot_store\n");
+               break;
+       case wr_append:
+               pr_err("append\n");
+               break;
+       case wr_node_store:
+               pr_err("node_store\n");
+               break;
+       case wr_spanning_store:
+               pr_err("spanning_store\n");
+               break;
+       case wr_rebalance:
+               pr_err("rebalance\n");
+               break;
+       }
+
        pr_err("[%u/%u] index=%lx last=%lx\n", mas->offset, mas->end,
               mas->index, mas->last);
        pr_err("     min=%lx max=%lx alloc=%p, depth=%u, flags=%x\n",