From patchwork Tue Jan 5 19:05:55 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wei Liu X-Patchwork-Id: 563287 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 84C4E1402BC for ; Wed, 6 Jan 2016 06:36:06 +1100 (AEDT) Received: from localhost ([::1]:51241 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aGXOm-0003cl-8J for incoming@patchwork.ozlabs.org; Tue, 05 Jan 2016 14:36:04 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53470) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aGXLL-0004y8-Pk for qemu-devel@nongnu.org; Tue, 05 Jan 2016 14:32:32 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aGXLK-0001AY-NW for qemu-devel@nongnu.org; Tue, 05 Jan 2016 14:32:31 -0500 Received: from smtp.citrix.com ([66.165.176.89]:26940) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aGXLK-00018c-Dx for qemu-devel@nongnu.org; Tue, 05 Jan 2016 14:32:30 -0500 X-IronPort-AV: E=Sophos;i="5.20,525,1444694400"; d="scan'208";a="323036090" From: Wei Liu To: Date: Tue, 5 Jan 2016 19:05:55 +0000 Message-ID: <1452020761-24457-17-git-send-email-wei.liu2@citrix.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1452020761-24457-1-git-send-email-wei.liu2@citrix.com> References: <1452020761-24457-1-git-send-email-wei.liu2@citrix.com> MIME-Version: 1.0 X-DLP: MIA2 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 66.165.176.89 Cc: "Michael S. Tsirkin" , Wei Liu , "Aneesh Kumar K.V" , Greg Kurz Subject: [Qemu-devel] [PATCH 16/22] 9pfs: make pdu_{, un}marshal proper functions X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Factor out v9fs_iov_v{,un}marshal. Implement pdu_{,un}marshal with those functions. Signed-off-by: Wei Liu --- fsdev/9p-iov-marshal.c | 42 ++++++++++++++++++++++++++++++------------ fsdev/9p-iov-marshal.h | 5 +++++ hw/9pfs/virtio-9p.c | 26 ++++++++++++++++++++++++++ hw/9pfs/virtio-9p.h | 6 ++---- 4 files changed, 63 insertions(+), 16 deletions(-) diff --git a/fsdev/9p-iov-marshal.c b/fsdev/9p-iov-marshal.c index d17983e..4db7133 100644 --- a/fsdev/9p-iov-marshal.c +++ b/fsdev/9p-iov-marshal.c @@ -76,15 +76,13 @@ static ssize_t v9fs_pack(struct iovec *in_sg, int in_num, size_t offset, return v9fs_packunpack((void *)src, in_sg, in_num, offset, size, 1); } -ssize_t v9fs_iov_unmarshal(struct iovec *out_sg, int out_num, size_t offset, - int bswap, const char *fmt, ...) +ssize_t v9fs_iov_vunmarshal(struct iovec *out_sg, int out_num, size_t offset, + int bswap, const char *fmt, va_list ap) { int i; - va_list ap; ssize_t copied = 0; size_t old_offset = offset; - va_start(ap, fmt); for (i = 0; fmt[i]; i++) { switch (fmt[i]) { case 'b': { @@ -195,25 +193,34 @@ ssize_t v9fs_iov_unmarshal(struct iovec *out_sg, int out_num, size_t offset, break; } if (copied < 0) { - va_end(ap); return copied; } offset += copied; } - va_end(ap); return offset - old_offset; } -ssize_t v9fs_iov_marshal(struct iovec *in_sg, int in_num, size_t offset, - int bswap, const char *fmt, ...) +ssize_t v9fs_iov_unmarshal(struct iovec *out_sg, int out_num, size_t offset, + int bswap, const char *fmt, ...) { - int i; + ssize_t ret; va_list ap; + + va_start(ap, fmt); + ret = v9fs_iov_vunmarshal(out_sg, out_num, offset, bswap, fmt, ap); + va_end(ap); + + return ret; +} + +ssize_t v9fs_iov_vmarshal(struct iovec *in_sg, int in_num, size_t offset, + int bswap, const char *fmt, va_list ap) +{ + int i; ssize_t copied = 0; size_t old_offset = offset; - va_start(ap, fmt); for (i = 0; fmt[i]; i++) { switch (fmt[i]) { case 'b': { @@ -316,12 +323,23 @@ ssize_t v9fs_iov_marshal(struct iovec *in_sg, int in_num, size_t offset, break; } if (copied < 0) { - va_end(ap); return copied; } offset += copied; } - va_end(ap); return offset - old_offset; } + +ssize_t v9fs_iov_marshal(struct iovec *in_sg, int in_num, size_t offset, + int bswap, const char *fmt, ...) +{ + ssize_t ret; + va_list ap; + + va_start(ap, fmt); + ret = v9fs_iov_vmarshal(in_sg, in_num, offset, bswap, fmt, ap); + va_end(ap); + + return ret; +} diff --git a/fsdev/9p-iov-marshal.h b/fsdev/9p-iov-marshal.h index 72c0cb3..410a1ea 100644 --- a/fsdev/9p-iov-marshal.h +++ b/fsdev/9p-iov-marshal.h @@ -7,4 +7,9 @@ ssize_t v9fs_iov_unmarshal(struct iovec *out_sg, int out_num, size_t offset, int bswap, const char *fmt, ...); ssize_t v9fs_iov_marshal(struct iovec *in_sg, int in_num, size_t offset, int bswap, const char *fmt, ...); + +ssize_t v9fs_iov_vunmarshal(struct iovec *out_sg, int out_num, size_t offset, + int bswap, const char *fmt, va_list ap); +ssize_t v9fs_iov_vmarshal(struct iovec *in_sg, int in_num, size_t offset, + int bswap, const char *fmt, va_list ap); #endif diff --git a/hw/9pfs/virtio-9p.c b/hw/9pfs/virtio-9p.c index 07e5eff..780c398 100644 --- a/hw/9pfs/virtio-9p.c +++ b/hw/9pfs/virtio-9p.c @@ -39,6 +39,32 @@ enum { Oappend = 0x80, }; +ssize_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) +{ + ssize_t ret; + va_list ap; + + va_start(ap, fmt); + ret = v9fs_iov_vmarshal(pdu->elem.in_sg, pdu->elem.in_num, + offset, 1, fmt, ap); + va_end(ap); + + return ret; +} + +ssize_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) +{ + ssize_t ret; + va_list ap; + + va_start(ap, fmt); + ret = v9fs_iov_vunmarshal(pdu->elem.out_sg, pdu->elem.out_num, + offset, 1, fmt, ap); + va_end(ap); + + return ret; +} + static int omode_to_uflags(int8_t mode) { int ret = 0; diff --git a/hw/9pfs/virtio-9p.h b/hw/9pfs/virtio-9p.h index 3a7e136..d6f3ac0 100644 --- a/hw/9pfs/virtio-9p.h +++ b/hw/9pfs/virtio-9p.h @@ -320,10 +320,8 @@ extern void v9fs_path_copy(V9fsPath *lhs, V9fsPath *rhs); extern int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath, const char *name, V9fsPath *path); -#define pdu_marshal(pdu, offset, fmt, args...) \ - v9fs_iov_marshal(pdu->elem.in_sg, pdu->elem.in_num, offset, 1, fmt, ##args) -#define pdu_unmarshal(pdu, offset, fmt, args...) \ - v9fs_iov_unmarshal(pdu->elem.out_sg, pdu->elem.out_num, offset, 1, fmt, ##args) +ssize_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...); +ssize_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...); #define TYPE_VIRTIO_9P "virtio-9p-device" #define VIRTIO_9P(obj) \