From patchwork Mon Jun 14 09:44:31 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [3/5,block] : Add paio_submit_len() non sector sized AIO Date: Sun, 13 Jun 2010 23:44:31 -0000 From: "Nicholas A. Bellinger" X-Patchwork-Id: 55506 Message-Id: <1276508671-3062-1-git-send-email-nab@linux-iscsi.org> To: Gerd Hoffmann , Kevin Wolf , FUJITA Tomonori Cc: kvm-devel , qemu-devel , Nicholas Bellinger , Hannes Reinecke , Christoph Hellwig , Paul Brook From: Nicholas Bellinger This patch adds posix-aio-compat.c:paio_submit_len(), which is a identical to paio_submit() expect that in expected nb_len instead of nb_sectors (* 512) so that it can be used by BSG AIO for write()/read() of struct sg_io_v4. Signed-off-by: Nicholas A. Bellinger --- block/raw-posix-aio.h | 3 +++ posix-aio-compat.c | 28 ++++++++++++++++++++++++++++ 2 files changed, 31 insertions(+), 0 deletions(-) diff --git a/block/raw-posix-aio.h b/block/raw-posix-aio.h index dfc63b8..29df842 100644 --- a/block/raw-posix-aio.h +++ b/block/raw-posix-aio.h @@ -30,6 +30,9 @@ int paio_init(void); BlockDriverAIOCB *paio_submit(BlockDriverState *bs, int fd, int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, BlockDriverCompletionFunc *cb, void *opaque, int type); +BlockDriverAIOCB *paio_submit_len(BlockDriverState *bs, int fd, + int64_t sector_num, QEMUIOVector *qiov, int nb_len, + BlockDriverCompletionFunc *cb, void *opaque, int type); BlockDriverAIOCB *paio_ioctl(BlockDriverState *bs, int fd, unsigned long int req, void *buf, BlockDriverCompletionFunc *cb, void *opaque); diff --git a/posix-aio-compat.c b/posix-aio-compat.c index 272e998..ac9276c 100644 --- a/posix-aio-compat.c +++ b/posix-aio-compat.c @@ -585,6 +585,34 @@ BlockDriverAIOCB *paio_submit(BlockDriverState *bs, int fd, return &acb->common; } +BlockDriverAIOCB *paio_submit_len(BlockDriverState *bs, int fd, + int64_t sector_num, QEMUIOVector *qiov, int nb_len, + BlockDriverCompletionFunc *cb, void *opaque, int type) +{ + struct qemu_paiocb *acb; + + acb = qemu_aio_get(&raw_aio_pool, bs, cb, opaque); + if (!acb) + return NULL; + acb->aio_type = type; + acb->aio_fildes = fd; + acb->ev_signo = SIGUSR2; + acb->async_context_id = get_async_context_id(); + + if (qiov) { + acb->aio_iov = qiov->iov; + acb->aio_niov = qiov->niov; + } + acb->aio_nbytes = nb_len; + acb->aio_offset = 0; + + acb->next = posix_aio_state->first_aio; + posix_aio_state->first_aio = acb; + + qemu_paio_submit(acb); + return &acb->common; +} + BlockDriverAIOCB *paio_ioctl(BlockDriverState *bs, int fd, unsigned long int req, void *buf, BlockDriverCompletionFunc *cb, void *opaque)