lkml.org 
[lkml]   [2011]   [May]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4/7] ns proc: Add support for the uts namespace
Date
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
---
fs/proc/namespaces.c | 3 +++
include/linux/proc_fs.h | 1 +
kernel/utsname.c | 39 +++++++++++++++++++++++++++++++++++++++
3 files changed, 43 insertions(+), 0 deletions(-)
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
index dcbd483..b017181 100644
--- a/fs/proc/namespaces.c
+++ b/fs/proc/namespaces.c
@@ -19,6 +19,9 @@ static const struct proc_ns_operations *ns_entries[] = {
#ifdef CONFIG_NET_NS
&netns_operations,
#endif
+#ifdef CONFIG_UTS_NS
+ &utsns_operations,
+#endif
};

static const struct file_operations ns_file_operations = {
diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index 62126ec..52aa89d 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -266,6 +266,7 @@ struct proc_ns_operations {
int (*install)(struct nsproxy *nsproxy, void *ns);
};
extern const struct proc_ns_operations netns_operations;
+extern const struct proc_ns_operations utsns_operations;

union proc_op {
int (*proc_get_link)(struct inode *, struct path *);
diff --git a/kernel/utsname.c b/kernel/utsname.c
index 4464617..bff131b 100644
--- a/kernel/utsname.c
+++ b/kernel/utsname.c
@@ -15,6 +15,7 @@
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/user_namespace.h>
+#include <linux/proc_fs.h>

static struct uts_namespace *create_uts_ns(void)
{
@@ -79,3 +80,41 @@ void free_uts_ns(struct kref *kref)
put_user_ns(ns->user_ns);
kfree(ns);
}
+
+static void *utsns_get(struct task_struct *task)
+{
+ struct uts_namespace *ns = NULL;
+ struct nsproxy *nsproxy;
+
+ rcu_read_lock();
+ nsproxy = task_nsproxy(task);
+ if (nsproxy) {
+ ns = nsproxy->uts_ns;
+ get_uts_ns(ns);
+ }
+ rcu_read_unlock();
+
+ return ns;
+}
+
+static void utsns_put(void *ns)
+{
+ put_uts_ns(ns);
+}
+
+static int utsns_install(struct nsproxy *nsproxy, void *ns)
+{
+ get_uts_ns(ns);
+ put_uts_ns(nsproxy->uts_ns);
+ nsproxy->uts_ns = ns;
+ return 0;
+}
+
+const struct proc_ns_operations utsns_operations = {
+ .name = "uts",
+ .type = CLONE_NEWUTS,
+ .get = utsns_get,
+ .put = utsns_put,
+ .install = utsns_install,
+};
+
--
1.6.5.2.143.g8cc62


\
 
 \ /
  Last update: 2011-05-07 04:29    [from the cache]
©2003-2011 Jasper Spaans