From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48409) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bCOOq-00073c-4W for qemu-devel@nongnu.org; Mon, 13 Jun 2016 05:43:17 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bCOOh-0002IP-Tq for qemu-devel@nongnu.org; Mon, 13 Jun 2016 05:43:13 -0400 Received: from mx1.redhat.com ([209.132.183.28]:47494) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bCOOh-0002II-Np for qemu-devel@nongnu.org; Mon, 13 Jun 2016 05:43:07 -0400 From: Paolo Bonzini Date: Mon, 13 Jun 2016 11:43:02 +0200 Message-Id: <1465810982-10191-1-git-send-email-pbonzini@redhat.com> Subject: [Qemu-devel] [PATCH] nbd: simplify the nbd_request and nbd_reply structs List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: eblake@redhat.com, peter.maydell@linaro.org These structs are never used to represent the bytes that go over the network. The big-endian network data is built into a uint8_t array in nbd_{receive,send}_{request,reply}. Remove the unused magic field, reorder the struct to avoid holes, and remove the packed attribute. Signed-off-by: Paolo Bonzini --- include/block/nbd.h | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/include/block/nbd.h b/include/block/nbd.h index b86a976..747bb0a 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -25,19 +25,20 @@ #include "io/channel-socket.h" #include "crypto/tlscreds.h" +/* Note: these are _NOT_ the same as the network representation of an NBD + * request and reply! + */ struct nbd_request { - uint32_t magic; - uint32_t type; uint64_t handle; uint64_t from; uint32_t len; -} QEMU_PACKED; + uint32_t type; +}; struct nbd_reply { - uint32_t magic; - uint32_t error; uint64_t handle; -} QEMU_PACKED; + uint32_t error; +}; #define NBD_FLAG_HAS_FLAGS (1 << 0) /* Flags are there */ #define NBD_FLAG_READ_ONLY (1 << 1) /* Device is read-only */ -- 2.5.5