[Devel] [PATCH hci-8.1 v2 2/4] ve: Introduce override_ve/revert_ve helpers

[Vladimir Riabchun <vladimir.riabchun@virtuozzo.com>]

These helpers mirror override_creds/revert_creds and are supposed to
be used together in cases when VE creds may be stored and later used
by the different VE task.

https://virtuozzo.atlassian.net/browse/VSTOR-142405
Signed-off-by: Vladimir Riabchun <vladimir.riabchun@virtuozzo.com>
---
 include/linux/ve.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/include/linux/ve.h b/include/linux/ve.h
index 717567775f58..9d633717a7fe 100644
--- a/include/linux/ve.h
+++ b/include/linux/ve.h
@@ -295,6 +295,23 @@ static inline struct vdso_image *ve_get_vdso_64(struct ve_struct *ve)
 	return ve->vdso_64;
 }
 
+static inline struct ve_struct *override_ve(struct ve_struct *new_ve)
+{
+	struct ve_struct *old_ve;
+
+	guard(task_lock)(current);
+	old_ve = current->task_ve;
+
+	current->task_ve = new_ve;
+	return old_ve;
+}
+
+static inline void revert_ve(struct ve_struct *orig_ve)
+{
+	guard(task_lock)(current);
+	current->task_ve = orig_ve;
+}
+
 #else	/* CONFIG_VE */
 #include <linux/init_task.h>
 #include <net/net_namespace.h>
@@ -405,6 +422,13 @@ static inline struct vdso_image *ve_get_vdso_64(struct ve_struct *ve)
 }
 #endif /* CONFIG_X86 */
 
+static inline struct ve_struct *override_ve(struct ve_struct *new_ve)
+{
+	return NULL;
+}
+
+static inline void revert_ve(struct ve_struct *orig_ve) {}
+
 #endif	/* CONFIG_VE */
 
 struct seq_file;

-- 
2.52.0

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