[PATCH v4 02/24] nbd: Consistent typedef usage in header

[Eric Blake <eblake@redhat.com>]

We had a mix of struct declarataions followed by typedefs, and direct
struct definitions as part of a typedef.  Pick a single style.  Also
float a couple of opaque typedefs earlier in the file, as a later
patch wants to refer NBDExport* in NBDRequest.  No semantic impact.

Signed-off-by: Eric Blake <eblake@redhat.com>
---

v4: new patch
---
 include/block/nbd.h | 28 ++++++++++++----------------
 1 file changed, 12 insertions(+), 16 deletions(-)

diff --git a/include/block/nbd.h b/include/block/nbd.h
index a4c98169c39..9c3ceae5ba5 100644
--- a/include/block/nbd.h
+++ b/include/block/nbd.h
@@ -1,5 +1,5 @@
 /*
- *  Copyright (C) 2016-2022 Red Hat, Inc.
+ *  Copyright Red Hat
  *  Copyright (C) 2005  Anthony Liguori <anthony@codemonkey.ws>
  *
  *  Network Block Device
@@ -26,24 +26,25 @@
 #include "qapi/error.h"
 #include "qemu/bswap.h"

+typedef struct NBDExport NBDExport;
+typedef struct NBDClient NBDClient;
+
 extern const BlockExportDriver blk_exp_nbd;

 /* Handshake phase structs - this struct is passed on the wire */

-struct NBDOption {
+typedef struct NBDOption {
     uint64_t magic; /* NBD_OPTS_MAGIC */
     uint32_t option; /* NBD_OPT_* */
     uint32_t length;
-} QEMU_PACKED;
-typedef struct NBDOption NBDOption;
+} QEMU_PACKED NBDOption;

-struct NBDOptionReply {
+typedef struct NBDOptionReply {
     uint64_t magic; /* NBD_REP_MAGIC */
     uint32_t option; /* NBD_OPT_* */
     uint32_t type; /* NBD_REP_* */
     uint32_t length;
-} QEMU_PACKED;
-typedef struct NBDOptionReply NBDOptionReply;
+} QEMU_PACKED NBDOptionReply;

 typedef struct NBDOptionReplyMetaContext {
     NBDOptionReply h; /* h.type = NBD_REP_META_CONTEXT, h.length > 4 */
@@ -56,14 +57,13 @@ typedef struct NBDOptionReplyMetaContext {
  * Note: these are _NOT_ the same as the network representation of an NBD
  * request and reply!
  */
-struct NBDRequest {
+typedef struct NBDRequest {
     uint64_t handle;
     uint64_t from;
     uint32_t len;
     uint16_t flags; /* NBD_CMD_FLAG_* */
     uint16_t type; /* NBD_CMD_* */
-};
-typedef struct NBDRequest NBDRequest;
+} NBDRequest;

 typedef struct NBDSimpleReply {
     uint32_t magic;  /* NBD_SIMPLE_REPLY_MAGIC */
@@ -282,7 +282,7 @@ static inline bool nbd_reply_type_is_error(int type)
 #define NBD_ESHUTDOWN  108

 /* Details collected by NBD_OPT_EXPORT_NAME and NBD_OPT_GO */
-struct NBDExportInfo {
+typedef struct NBDExportInfo {
     /* Set by client before nbd_receive_negotiate() */
     bool request_sizes;
     char *x_dirty_bitmap;
@@ -310,8 +310,7 @@ struct NBDExportInfo {
     char *description;
     int n_contexts;
     char **contexts;
-};
-typedef struct NBDExportInfo NBDExportInfo;
+} NBDExportInfo;

 int nbd_receive_negotiate(AioContext *aio_context, QIOChannel *ioc,
                           QCryptoTLSCreds *tlscreds,
@@ -330,9 +329,6 @@ int nbd_client(int fd);
 int nbd_disconnect(int fd);
 int nbd_errno_to_system_errno(int err);

-typedef struct NBDExport NBDExport;
-typedef struct NBDClient NBDClient;
-
 void nbd_export_set_on_eject_blk(BlockExport *exp, BlockBackend *blk);

 AioContext *nbd_export_aio_context(NBDExport *exp);
-- 
2.40.1