proc: Split the namespace stuff out into linux/proc_ns.h

Split the proc namespace stuff out into linux/proc_ns.h.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: netdev@vger.kernel.org
cc: Serge E. Hallyn <serge.hallyn@ubuntu.com>
cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

2 files changed, 15 insertions, 10 deletions

diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index bd2f76427fec..073aea60cf8f 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -51,8 +51,8 @@ static void proc_evict_inode(struct inode *inode)
                 sysctl_head_put(head);
         }
         /* Release any associated namespace */
-        ns_ops = PROC_I(inode)->ns_ops;
-        ns = PROC_I(inode)->ns;
+        ns_ops = PROC_I(inode)->ns.ns_ops;
+        ns = PROC_I(inode)->ns.ns;
         if (ns_ops && ns)
                 ns_ops->put(ns);
 }
@@ -73,8 +73,8 @@ static struct inode *proc_alloc_inode(struct super_block *sb)
         ei->pde = NULL;
         ei->sysctl = NULL;
         ei->sysctl_entry = NULL;
-        ei->ns = NULL;
-        ei->ns_ops = NULL;
+        ei->ns.ns = NULL;
+        ei->ns.ns_ops = NULL;
         inode = &ei->vfs_inode;
         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
         return inode;
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
index 66b51c0383da..54bdc6701e9f 100644
--- a/fs/proc/namespaces.c
+++ b/fs/proc/namespaces.c
@@ -51,7 +51,7 @@ static int ns_delete_dentry(const struct dentry *dentry)
 static char *ns_dname(struct dentry *dentry, char *buffer, int buflen)
 {
         struct inode *inode = dentry->d_inode;
-        const struct proc_ns_operations *ns_ops = PROC_I(inode)->ns_ops;
+        const struct proc_ns_operations *ns_ops = PROC_I(inode)->ns.ns_ops;
 
         return dynamic_dname(dentry, buffer, buflen, "%s:[%lu]",
                 ns_ops->name, inode->i_ino);
@@ -95,8 +95,8 @@ static struct dentry *proc_ns_get_dentry(struct super_block *sb,
                 inode->i_op = &ns_inode_operations;
                 inode->i_mode = S_IFREG | S_IRUGO;
                 inode->i_fop = &ns_file_operations;
-                ei->ns_ops = ns_ops;
-                ei->ns = ns;
+                ei->ns.ns_ops = ns_ops;
+                ei->ns.ns = ns;
                 unlock_new_inode(inode);
         } else {
                 ns_ops->put(ns);
@@ -128,7 +128,7 @@ static void *proc_ns_follow_link(struct dentry *dentry, struct nameidata *nd)
         if (!ptrace_may_access(task, PTRACE_MODE_READ))
                 goto out_put_task;
 
-        ns_path.dentry = proc_ns_get_dentry(sb, task, ei->ns_ops);
+        ns_path.dentry = proc_ns_get_dentry(sb, task, ei->ns.ns_ops);
         if (IS_ERR(ns_path.dentry)) {
                 error = ERR_CAST(ns_path.dentry);
                 goto out_put_task;
@@ -148,7 +148,7 @@ static int proc_ns_readlink(struct dentry *dentry, char __user *buffer, int bufl
 {
         struct inode *inode = dentry->d_inode;
         struct proc_inode *ei = PROC_I(inode);
-        const struct proc_ns_operations *ns_ops = ei->ns_ops;
+        const struct proc_ns_operations *ns_ops = ei->ns.ns_ops;
         struct task_struct *task;
         void *ns;
         char name[50];
@@ -202,7 +202,7 @@ static struct dentry *proc_ns_instantiate(struct inode *dir,
         ei = PROC_I(inode);
         inode->i_mode = S_IFLNK|S_IRWXUGO;
         inode->i_op = &proc_ns_link_inode_operations;
-        ei->ns_ops = ns_ops;
+        ei->ns.ns_ops = ns_ops;
 
         d_set_d_op(dentry, &pid_dentry_operations);
         d_add(dentry, inode);
@@ -337,6 +337,11 @@ out_invalid:
         return ERR_PTR(-EINVAL);
 }
 
+struct proc_ns *get_proc_ns(struct inode *inode)
+{
+        return &PROC_I(inode)->ns;
+}
+
 bool proc_ns_inode(struct inode *inode)
 {
         return inode->i_fop == &ns_file_operations;