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From 76fcbe46a52b467cd2cd96a671bfccd26871153e Mon Sep 17 00:00:00 2001
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From: Ronnie Sahlberg <ronniesahlberg@gmail.com>
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Date: Thu, 30 Aug 2012 17:28:40 -0700
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Subject: [PATCH] iSCSI: We need to support SG_IO also from iscsi_ioctl()
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We need to support SG_IO from the synchronous iscsi_ioctl() since
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scsi-block uses this to do an INQ to the device to discover its properties
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This patch makes scsi-block work with iscsi.
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Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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(cherry picked from commit f1a12821d7df2e4d21be4f2206f84b4640533e53)
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Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
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---
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block/iscsi.c | 17 +++++++++++++++++
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1 file changed, 17 insertions(+)
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diff --git a/block/iscsi.c b/block/iscsi.c
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index 0b96165..ea16609 100644
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--- a/block/iscsi.c
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+++ b/block/iscsi.c
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@@ -628,9 +628,17 @@ static BlockDriverAIOCB *iscsi_aio_ioctl(BlockDriverState *bs,
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return &acb->common;
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}
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+
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+static void ioctl_cb(void *opaque, int status)
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+{
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+ int *p_status = opaque;
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+ *p_status = status;
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+}
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+
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static int iscsi_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
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{
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IscsiLun *iscsilun = bs->opaque;
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+ int status;
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switch (req) {
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case SG_GET_VERSION_NUM:
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@@ -639,6 +647,15 @@ static int iscsi_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
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case SG_GET_SCSI_ID:
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((struct sg_scsi_id *)buf)->scsi_type = iscsilun->type;
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break;
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+ case SG_IO:
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+ status = -EINPROGRESS;
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+ iscsi_aio_ioctl(bs, req, buf, ioctl_cb, &status);
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+
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+ while (status == -EINPROGRESS) {
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+ qemu_aio_wait();
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+ }
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+
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+ return 0;
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default:
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return -1;
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}
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--
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1.7.12.1
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