This helper is useful to check if a feature is supported.
Signed-off-by: Asias He <asias@xxxxxxxxxx>
---
drivers/vhost/tcm_vhost.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/vhost/tcm_vhost.c b/drivers/vhost/tcm_vhost.c
index b3e50d7..fdbf986 100644
--- a/drivers/vhost/tcm_vhost.c
+++ b/drivers/vhost/tcm_vhost.c
@@ -91,6 +91,20 @@ static int iov_num_pages(struct iovec *iov)
((unsigned long)iov->iov_base & PAGE_MASK)) >> PAGE_SHIFT;
}
+static bool tcm_vhost_check_feature(struct vhost_scsi *vs, u64 feature)
+{
+ u64 acked_features;
+ bool ret = false;
+
+ mutex_lock(&vs->dev.mutex);
+ acked_features = vs->dev.acked_features;
+ if (acked_features & 1ULL << feature)
+ ret = true;
+ mutex_unlock(&vs->dev.mutex);
+
+ return ret;
+}
+
static int tcm_vhost_check_true(struct se_portal_group *se_tpg)
{
return 1;
--
1.8.1.4
--
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