[Devel] [PATCH RHEL8 COMMIT] ve/fs/ioprio: Confine ioprio_{set, get}(IOPRIO_WHO_USER) to current ve

[Konstantin Khorenko]

The commit is pushed to "branch-rh8-4.18.0-240.1.1.vz8.5.x-ovz" and will appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh8-4.18.0-240.1.1.vz8.5.14
------>
commit b88376b777183394a45205b33ba7fbe2904b7660
Author: Vladimir Davydov <vdavydov.dev at gmail.com>
Date:   Thu Apr 15 20:30:46 2021 +0300

    ve/fs/ioprio: Confine ioprio_{set, get}(IOPRIO_WHO_USER) to current ve
    
    As long as we don't use user namespaces, we have to force
    iorpio_{set,get}(IOPRIO_WHO_USER) to iterate over processes of the
    current ve only.
    
    Signed-off-by: Vladimir Davydov <vdavydov at parallels.com>
    
    =====================================================================
    
    VZ 8 rebase part https://jira.sw.ru/browse/PSBM-127782
    vz7 commit: b74a04f ("ve/fs/ioprio: confine ioprio_{set, get}(IOPRIO_WHO_USER)
    to current ve")
    
    Signed-off-by: Alexander Mikhalitsyn <alexander.mikhalitsyn at virtuozzo.com>
---
 block/ioprio.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/block/ioprio.c b/block/ioprio.c
index c56ee7edbbc7..ca224f7a28be 100644
--- a/block/ioprio.c
+++ b/block/ioprio.c
@@ -153,6 +153,10 @@ SYSCALL_DEFINE3(ioprio_set, int, which, int, who, int, ioprio)
 				break;
 
 			for_each_process_thread(g, p) {
+#ifdef CONFIG_VE
+				if (p->task_ve != get_exec_env())
+					continue;
+#endif
 				if (!uid_eq(task_uid(p), uid) ||
 				    !task_pid_vnr(p))
 					continue;
@@ -243,6 +247,10 @@ SYSCALL_DEFINE2(ioprio_get, int, which, int, who)
 				break;
 
 			for_each_process_thread(g, p) {
+#ifdef CONFIG_VE
+				if (p->task_ve != get_exec_env())
+					continue;
+#endif
 				if (!uid_eq(task_uid(p), user->uid) ||
 				    !task_pid_vnr(p))
 					continue;