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[3/5] block: Add paio_submit_len() non sector sized AIO

Message ID 1290588020-8912-1-git-send-email-nab@linux-iscsi.org
State New
Headers show

Commit Message

Nicholas A. Bellinger Nov. 24, 2010, 8:40 a.m. UTC 
From: Nicholas Bellinger <nab@linux-iscsi.org>

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 <nab@linux-iscsi.org>
---
 block/raw-posix-aio.h |    3 +++
 posix-aio-compat.c    |   29 +++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+), 0 deletions(-)
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Patch

diff --git a/block/raw-posix-aio.h b/block/raw-posix-aio.h
index dfc63b8..8028d5b 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 0704064..df9efb7 100644
--- a/posix-aio-compat.c
+++ b/posix-aio-compat.c
@@ -588,6 +588,35 @@  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)