The commit is pushed to "branch-rh10-6.12.0-55.13.1.2.x.vz10-ovz" and will
appear at [email protected]:openvz/vzkernel.git
after rh10-6.12.0-55.13.1.2.21.vz10
------>
commit 051c7f2f36453da543364b4135f241ecf168e09b
Author: Pavel Tikhomirov <[email protected]>
Date: Mon Nov 24 19:20:46 2025 +0800
ve: Add ve namespace based task_ve() and get_task_ve() helpers
Those will replace task->task_ve references.
We protect access to other task's task_ve with task_lock. To actually be
able to dereference ve fields we also have to take reference on it,
because other task's task_ve can change under us.
If we don't plan to dereference ve and only use it to compare with other
ve, we can just read it without any locking.
https://virtuozzo.atlassian.net/browse/VSTOR-118289
Signed-off-by: Pavel Tikhomirov <[email protected]>
Feature: ve: ve generic structures
======
Patchset description:
ve: Add VE namespace
Main ideas behind VE namespace explained in "ve: Introduce VE
namespace".
---
include/linux/ve.h | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/include/linux/ve.h b/include/linux/ve.h
index 63b80068e2fb5..f664740041001 100644
--- a/include/linux/ve.h
+++ b/include/linux/ve.h
@@ -179,6 +179,17 @@ void cgroot_ve_cleanup_ra_data(struct cgroup_root *cgroot);
extern struct ve_struct *get_ve(struct ve_struct *ve);
extern void put_ve(struct ve_struct *ve);
+static inline struct ve_struct *task_ve(struct task_struct *task)
+{
+ return READ_ONCE(task->task_ve);
+}
+
+static inline struct ve_struct *get_task_ve(struct task_struct *task)
+{
+ guard(task_lock)(task);
+ return get_ve(task_ve(task));
+}
+
void ve_stop_ns(struct pid_namespace *ns);
void ve_exit_ns(struct pid_namespace *ns);
bool ve_check_trusted_exec(struct file *file, struct filename *name);
@@ -248,6 +259,16 @@ extern bool is_ve_init_net(const struct net *net);
#define get_ve(ve) ((void)(ve), NULL)
#define put_ve(ve) do { (void)(ve); } while (0)
+static inline struct ve_struct *task_ve(struct task_struct *task)
+{
+ return NULL;
+}
+
+static inline struct ve_struct *get_task_ve(struct task_struct *task)
+{
+ return NULL;
+}
+
static inline void ve_stop_ns(struct pid_namespace *ns) { }
static inline void ve_exit_ns(struct pid_namespace *ns) { }
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