The commit is pushed to "branch-rh7-3.10.0-1127.18.2.vz7.163.x-ovz" and will
appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-1127.18.2.el7
------>
commit 11129e0a32053d492e537fc66c485c6156c41c00
Author: Valeriy Vdovin <[email protected]>
Date: Thu Aug 6 08:31:03 2020 +0300
cgroup: added rcu node string wrapper for in-cgroup usage.
This will be used in further patches in same patchset.
Signed-off-by: Valeriy Vdovin <[email protected]>
Reviewed-by: Kirill Tkhai <[email protected]>
---
include/linux/cgroup.h | 7 +++++++
kernel/cgroup.c | 15 +++++++++++++++
2 files changed, 22 insertions(+)
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 919cddd..ce46ee8 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -239,6 +239,13 @@ struct cgroup_name {
char name[];
};
+struct cgroup_rcu_string {
+ struct rcu_head rcu_head;
+ char val[];
+};
+
+struct cgroup_rcu_string *cgroup_rcu_strdup(const char *str, int len);
+
struct cgroup {
unsigned long flags; /* "unsigned long" so bitops work */
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 956a9ac..f4185de 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -777,6 +777,21 @@ static struct inode *cgroup_new_inode(umode_t mode, struct
super_block *sb)
return inode;
}
+struct cgroup_rcu_string *cgroup_rcu_strdup(const char *str, int len)
+{
+ struct cgroup_rcu_string *result;
+ size_t buflen = len + 1;
+
+ result = kmalloc(sizeof(*result) + buflen, GFP_KERNEL);
+ if (!result)
+ return ERR_PTR(-ENOMEM);
+ if (strlcpy(result->val, str, buflen) >= buflen) {
+ kfree(result);
+ return ERR_PTR(-ENAMETOOLONG);
+ }
+ return result;
+}
+
static struct cgroup_name *cgroup_alloc_name(struct dentry *dentry)
{
struct cgroup_name *name;
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