nbdkit/0002-server-Rename-threadlocal_-set-get-_error-to-._errno.patch

From ae28c97079cce7792c5954f67a418402a48ed0cf Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Wed, 24 Jul 2024 10:29:13 +0100
Subject: [PATCH] server: Rename threadlocal_{set,get}_error to .._errno

A simple mechanical change, to avoid confusion with
threadlocal_{set,get}_last_error introduced in the following commit.

(cherry picked from commit 1d7f655726ad3483d0e8086741182aada7ae8595)
---
 server/internal.h    |  4 ++--
 server/plugins.c     | 27 +++++++++++++--------------
 server/protocol.c    |  5 +++--
 server/threadlocal.c |  4 ++--
 4 files changed, 20 insertions(+), 20 deletions(-)

diff --git a/server/internal.h b/server/internal.h
index 57e777e9..6549c87b 100644
--- a/server/internal.h
+++ b/server/internal.h
@@ -568,8 +568,8 @@ extern void threadlocal_set_name (const char *name)
 extern const char *threadlocal_get_name (void);
 extern void threadlocal_set_instance_num (size_t instance_num);
 extern size_t threadlocal_get_instance_num (void);
-extern void threadlocal_set_error (int err);
-extern int threadlocal_get_error (void);
+extern void threadlocal_set_errno (int err);
+extern int threadlocal_get_errno (void);
 extern void *threadlocal_buffer (size_t size);
 extern void threadlocal_set_conn (struct connection *conn);
 extern struct connection *threadlocal_get_conn (void);
diff --git a/server/plugins.c b/server/plugins.c
index ca89ac7a..3c7df0d2 100644
--- a/server/plugins.c
+++ b/server/plugins.c
@@ -633,15 +633,14 @@ plugin_can_cache (struct context *c)
 NBDKIT_DLL_PUBLIC void
 nbdkit_set_error (int err)
 {
-  threadlocal_set_error (err);
+  threadlocal_set_errno (err);
 }
 
-/* Grab the appropriate error value.
- */
+/* Grab the appropriate error value. */
 static int
-get_error (struct backend_plugin *p)
+get_errno (struct backend_plugin *p)
 {
-  int ret = threadlocal_get_error ();
+  int ret = threadlocal_get_errno ();
 
   if (!ret && p->plugin.errno_is_preserved != 0)
     ret = errno;
@@ -664,7 +663,7 @@ plugin_pread (struct context *c,
   else
     r = p->plugin._pread_v1 (c->handle, buf, count, offset);
   if (r == -1)
-    *err = get_error (p);
+    *err = get_errno (p);
   return r;
 }
 
@@ -685,7 +684,7 @@ plugin_flush (struct context *c,
     return -1;
   }
   if (r == -1)
-    *err = get_error (p);
+    *err = get_errno (p);
   return r;
 }
 
@@ -715,7 +714,7 @@ plugin_pwrite (struct context *c,
   if (r != -1 && need_flush)
     r = plugin_flush (c, 0, err);
   if (r == -1 && !*err)
-    *err = get_error (p);
+    *err = get_errno (p);
   return r;
 }
 
@@ -744,7 +743,7 @@ plugin_trim (struct context *c,
   if (r != -1 && need_flush)
     r = plugin_flush (c, 0, err);
   if (r == -1 && !*err)
-    *err = get_error (p);
+    *err = get_errno (p);
   return r;
 }
 
@@ -782,7 +781,7 @@ plugin_zero (struct context *c,
     else
       emulate = true;
     if (r == -1)
-      *err = emulate ? EOPNOTSUPP : get_error (p);
+      *err = emulate ? EOPNOTSUPP : get_errno (p);
     if (r == 0 || (*err != EOPNOTSUPP && *err != ENOTSUP))
       goto done;
   }
@@ -794,7 +793,7 @@ plugin_zero (struct context *c,
   }
 
   flags &= ~NBDKIT_FLAG_MAY_TRIM;
-  threadlocal_set_error (0);
+  threadlocal_set_errno (0);
   *err = 0;
 
   while (count) {
@@ -814,7 +813,7 @@ plugin_zero (struct context *c,
   if (r != -1 && need_flush)
     r = plugin_flush (c, 0, err);
   if (r == -1 && !*err)
-    *err = get_error (p);
+    *err = get_errno (p);
   return r;
 }
 
@@ -839,7 +838,7 @@ plugin_extents (struct context *c,
     r = -1;
   }
   if (r == -1)
-    *err = get_error (p);
+    *err = get_errno (p);
   return r;
 }
 
@@ -859,7 +858,7 @@ plugin_cache (struct context *c,
 
   r = p->plugin.cache (c->handle, count, offset, flags);
   if (r == -1)
-    *err = get_error (p);
+    *err = get_errno (p);
   return r;
 }
 
diff --git a/server/protocol.c b/server/protocol.c
index 9b63f789..677da05c 100644
--- a/server/protocol.c
+++ b/server/protocol.c
@@ -235,8 +235,9 @@ handle_request (uint16_t cmd, uint16_t flags, uint64_t offset, uint32_t count,
   int err = 0;
 
   /* Clear the error, so that we know if the plugin calls
-   * nbdkit_set_error() or relied on errno.  */
-  threadlocal_set_error (0);
+   * nbdkit_set_error() or relied on errno.
+   */
+  threadlocal_set_errno (0);
 
   switch (cmd) {
   case NBD_CMD_READ:
diff --git a/server/threadlocal.c b/server/threadlocal.c
index 088fe55a..9bb656bc 100644
--- a/server/threadlocal.c
+++ b/server/threadlocal.c
@@ -154,7 +154,7 @@ threadlocal_get_instance_num (void)
 }
 
 void
-threadlocal_set_error (int err)
+threadlocal_set_errno (int err)
 {
   struct threadlocal *threadlocal = pthread_getspecific (threadlocal_key);
 
@@ -167,7 +167,7 @@ threadlocal_set_error (int err)
 /* This preserves errno, for convenience.
  */
 int
-threadlocal_get_error (void)
+threadlocal_get_errno (void)
 {
   int err = errno;
   struct threadlocal *threadlocal = pthread_getspecific (threadlocal_key);
-- 
2.43.0