External users might want to get the vfio_group from a given
device, and put it after the usage.
Signed-off-by: Jike Song <jike.song@xxxxxxxxx>
---
drivers/vfio/vfio.c | 6 ++++--
include/linux/vfio.h | 3 +++
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index 23bc86c..e3e58e3 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -414,10 +414,11 @@ static void vfio_group_release(struct kref *kref)
iommu_group_put(iommu_group);
}
-static void vfio_group_put(struct vfio_group *group)
+void vfio_group_put(struct vfio_group *group)
{
kref_put_mutex(&group->kref, vfio_group_release, &vfio.group_lock);
}
+EXPORT_SYMBOL_GPL(vfio_group_put);
/* Assume group_lock or group reference is held */
static void vfio_group_get(struct vfio_group *group)
@@ -480,7 +481,7 @@ static struct vfio_group *vfio_group_get_from_minor(int minor)
return group;
}
-static struct vfio_group *vfio_group_get_from_dev(struct device *dev)
+struct vfio_group *vfio_group_get_from_dev(struct device *dev)
{
struct iommu_group *iommu_group;
struct vfio_group *group;
@@ -494,6 +495,7 @@ static struct vfio_group *vfio_group_get_from_dev(struct device *dev)
return group;
}
+EXPORT_SYMBOL_GPL(vfio_group_get_from_dev);
/**
* Device objects - create, release, get, put, search
diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index 0ecae0b..ad9b857 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -92,6 +92,9 @@ extern void vfio_unregister_iommu_driver(
extern long vfio_external_check_extension(struct vfio_group *group,
unsigned long arg);
+extern struct vfio_group *vfio_group_get_from_dev(struct device *dev);
+extern void vfio_group_put(struct vfio_group *group);
+
/*
* Sub-module helpers
*/
--
1.9.1
--
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