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[Qemu-devel] [PATCH 2/5] [block]: Add BSG qemu_open() in block/raw.c:raw
From: |
Nicholas A. Bellinger |
Subject: |
[Qemu-devel] [PATCH 2/5] [block]: Add BSG qemu_open() in block/raw.c:raw_open() |
Date: |
Mon, 14 Jun 2010 02:44:24 -0700 |
From: Nicholas Bellinger <address@hidden>
This patch adds a BSG specific qemu_open() call in block/raw.c:raw_open() that
saves the opened file descriptor for BSG AIO into BlockDriverState->fd.
It also adds the reverse close() call to block/raw.c:raw_close()
Signed-off-by: Nicholas A. Bellinger <address@hidden>
---
block/raw.c | 20 ++++++++++++++++++++
1 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/block/raw.c b/block/raw.c
index 4406b8c..7820c78 100644
--- a/block/raw.c
+++ b/block/raw.c
@@ -5,7 +5,25 @@
static int raw_open(BlockDriverState *bs, int flags)
{
+ int fd, ret;
+
bs->sg = bs->file->sg;
+ /*
+ * scsi-generic and other raw types do not call qemu_open()
+ */
+ if (bs->sg != BDS_BSG)
+ return 0;
+ /*
+ * Obtain a file descriptor for the underlying BSG device for AIO w/ iovecs
+ */
+ fd = qemu_open(bs->filename, flags, 0644);
+ if (fd < 0) {
+ ret = -errno;
+ if (ret == -EROFS)
+ ret = -EACCES;
+ return ret;
+ }
+ bs->fd = fd;
return 0;
}
@@ -37,6 +55,8 @@ static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
static void raw_close(BlockDriverState *bs)
{
+ if (bs->fd > 0)
+ close(bs->fd);
}
static void raw_flush(BlockDriverState *bs)
--
1.5.6.5
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Nicholas A. Bellinger <=