nbdkit/0008-cache-Refactor-printing-state-into-new-function.patch

From 2592bb42051b3e6d17240badc814b9b16f121c1d Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Tue, 27 Jul 2021 21:16:30 +0100
Subject: [PATCH] cache: Refactor printing state into new function

This minor refactoring just makes the cache and cow filters' blk.c a
little bit more similar.

(cherry picked from commit bdb86ea14c00a950f2a2d34071ac1e0799d29132)
---
 filters/cache/blk.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/filters/cache/blk.c b/filters/cache/blk.c
index 6276985f..e50a7f24 100644
--- a/filters/cache/blk.c
+++ b/filters/cache/blk.c
@@ -94,6 +94,17 @@ enum bm_entry {
   BLOCK_DIRTY = 3,
 };
 
+static const char *
+state_to_string (enum bm_entry state)
+{
+  switch (state) {
+  case BLOCK_NOT_CACHED: return "not cached";
+  case BLOCK_CLEAN: return "clean";
+  case BLOCK_DIRTY: return "dirty";
+  default: abort ();
+  }
+}
+
 /* Extra debugging (-D cache.verbose=1). */
 NBDKIT_DLL_PUBLIC int cache_debug_verbose = 0;
 
@@ -312,10 +323,7 @@ blk_cache (nbdkit_next *next,
     nbdkit_debug ("cache: blk_cache block %" PRIu64
                   " (offset %" PRIu64 ") is %s",
                   blknum, (uint64_t) offset,
-                  state == BLOCK_NOT_CACHED ? "not cached" :
-                  state == BLOCK_CLEAN ? "clean" :
-                  state == BLOCK_DIRTY ? "dirty" :
-                  "unknown");
+                  state_to_string (state));
 
   if (state == BLOCK_NOT_CACHED) {
     /* Read underlying plugin, copy to cache regardless of cache-on-read. */
-- 
2.31.1