From 33c429405a2c8d9e42afb9fee88a63cfb2de1e98 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 1 Nov 2014 02:32:53 -0400
Subject: [PATCH] copy address of proc_ns_ops into ns_common
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namespace.c | 1 +
fs/proc/inode.c | 6 ++----
include/linux/ns_common.h | 3 +++
init/version.c | 3 +++
ipc/msgutil.c | 3 +++
ipc/namespace.c | 1 +
kernel/nsproxy.c | 8 ++++----
kernel/pid.c | 3 +++
kernel/pid_namespace.c | 1 +
kernel/user.c | 3 +++
kernel/user_namespace.c | 1 +
kernel/utsname.c | 2 ++
net/core/net_namespace.c | 9 +++++++--
13 files changed, 34 insertions(+), 10 deletions(-)
diff --git a/fs/namespace.c b/fs/namespace.c
index 30738d200866d..f815218f92d31 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2672,6 +2672,7 @@ static struct mnt_namespace *alloc_mnt_ns(struct user_namespace *user_ns)
kfree(new_ns);
return ERR_PTR(ret);
}
+ new_ns->ns.ops = &mntns_operations;
new_ns->seq = atomic64_add_return(1, &mnt_ns_seq);
atomic_set(&new_ns->count, 1);
new_ns->root = NULL;
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 43b703c6cd3b0..a212996e0987c 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -32,7 +32,6 @@ static void proc_evict_inode(struct inode *inode)
{
struct proc_dir_entry *de;
struct ctl_table_header *head;
- const struct proc_ns_operations *ns_ops;
struct ns_common *ns;
truncate_inode_pages_final(&inode->i_data);
@@ -51,10 +50,9 @@ static void proc_evict_inode(struct inode *inode)
sysctl_head_put(head);
}
/* Release any associated namespace */
- ns_ops = PROC_I(inode)->ns.ns_ops;
ns = PROC_I(inode)->ns.ns;
- if (ns_ops && ns)
- ns_ops->put(ns);
+ if (ns && ns->ops)
+ ns->ops->put(ns);
}
static struct kmem_cache * proc_inode_cachep;
diff --git a/include/linux/ns_common.h b/include/linux/ns_common.h
index e7db1cd540474..ce23cf4bbe690 100644
--- a/include/linux/ns_common.h
+++ b/include/linux/ns_common.h
@@ -1,7 +1,10 @@
#ifndef _LINUX_NS_COMMON_H
#define _LINUX_NS_COMMON_H
+struct proc_ns_operations;
+
struct ns_common {
+ const struct proc_ns_operations *ops;
unsigned int inum;
};
diff --git a/init/version.c b/init/version.c
index e23dbdabb26bf..fe41a63efed63 100644
--- a/init/version.c
+++ b/init/version.c
@@ -36,6 +36,9 @@ struct uts_namespace init_uts_ns = {
},
.user_ns = &init_user_ns,
.ns.inum = PROC_UTS_INIT_INO,
+#ifdef CONFIG_UTS_NS
+ .ns.ops = &utsns_operations,
+#endif
};
EXPORT_SYMBOL_GPL(init_uts_ns);
diff --git a/ipc/msgutil.c b/ipc/msgutil.c
index 5930471a29022..2b491590ebab1 100644
--- a/ipc/msgutil.c
+++ b/ipc/msgutil.c
@@ -32,6 +32,9 @@ struct ipc_namespace init_ipc_ns = {
.count = ATOMIC_INIT(1),
.user_ns = &init_user_ns,
.ns.inum = PROC_IPC_INIT_INO,
+#ifdef CONFIG_IPC_NS
+ .ns.ops = &ipcns_operations,
+#endif
};
atomic_t nr_ipc_ns = ATOMIC_INIT(1);
diff --git a/ipc/namespace.c b/ipc/namespace.c
index bcdd7a5c122aa..382e2aa42d8aa 100644
--- a/ipc/namespace.c
+++ b/ipc/namespace.c
@@ -31,6 +31,7 @@ static struct ipc_namespace *create_ipc_ns(struct user_namespace *user_ns,
kfree(ns);
return ERR_PTR(err);
}
+ ns->ns.ops = &ipcns_operations;
atomic_set(&ns->count, 1);
err = mq_init_ns(ns);
diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c
index ef42d0ab31157..87c37221cb7f6 100644
--- a/kernel/nsproxy.c
+++ b/kernel/nsproxy.c
@@ -220,11 +220,11 @@ void exit_task_namespaces(struct task_struct *p)
SYSCALL_DEFINE2(setns, int, fd, int, nstype)
{
- const struct proc_ns_operations *ops;
struct task_struct *tsk = current;
struct nsproxy *new_nsproxy;
struct proc_ns *ei;
struct file *file;
+ struct ns_common *ns;
int err;
file = proc_ns_fget(fd);
@@ -233,8 +233,8 @@ SYSCALL_DEFINE2(setns, int, fd, int, nstype)
err = -EINVAL;
ei = get_proc_ns(file_inode(file));
- ops = ei->ns_ops;
- if (nstype && (ops->type != nstype))
+ ns = ei->ns;
+ if (nstype && (ns->ops->type != nstype))
goto out;
new_nsproxy = create_new_namespaces(0, tsk, current_user_ns(), tsk->fs);
@@ -243,7 +243,7 @@ SYSCALL_DEFINE2(setns, int, fd, int, nstype)
goto out;
}
- err = ops->install(new_nsproxy, ei->ns);
+ err = ns->ops->install(new_nsproxy, ns);
if (err) {
free_nsproxy(new_nsproxy);
goto out;
diff --git a/kernel/pid.c b/kernel/pid.c
index 3650698cf1dc9..c17a993a4d2a3 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -80,6 +80,9 @@ struct pid_namespace init_pid_ns = {
.child_reaper = &init_task,
.user_ns = &init_user_ns,
.ns.inum = PROC_PID_INIT_INO,
+#ifdef CONFIG_PID_NS
+ .ns.ops = &pidns_operations,
+#endif
};
EXPORT_SYMBOL_GPL(init_pid_ns);
diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index 5aa9158a84d55..e1bafe3b47bb4 100644
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c
@@ -108,6 +108,7 @@ static struct pid_namespace *create_pid_namespace(struct user_namespace *user_ns
err = ns_alloc_inum(&ns->ns);
if (err)
goto out_free_map;
+ ns->ns.ops = &pidns_operations;
kref_init(&ns->kref);
ns->level = level;
diff --git a/kernel/user.c b/kernel/user.c
index a7ca84bad8e6c..69b800aebf135 100644
--- a/kernel/user.c
+++ b/kernel/user.c
@@ -51,6 +51,9 @@ struct user_namespace init_user_ns = {
.owner = GLOBAL_ROOT_UID,
.group = GLOBAL_ROOT_GID,
.ns.inum = PROC_USER_INIT_INO,
+#ifdef CONFIG_USER_NS
+ .ns.ops = &userns_operations,
+#endif
#ifdef CONFIG_PERSISTENT_KEYRINGS
.persistent_keyring_register_sem =
__RWSEM_INITIALIZER(init_user_ns.persistent_keyring_register_sem),
diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c
index 6bf8177768e5d..1491ad00388fe 100644
--- a/kernel/user_namespace.c
+++ b/kernel/user_namespace.c
@@ -91,6 +91,7 @@ int create_user_ns(struct cred *new)
kmem_cache_free(user_ns_cachep, ns);
return ret;
}
+ ns->ns.ops = &userns_operations;
atomic_set(&ns->count, 1);
/* Leave the new->user_ns reference with the new user namespace. */
diff --git a/kernel/utsname.c b/kernel/utsname.c
index c2a2b321d88a9..831ea71082320 100644
--- a/kernel/utsname.c
+++ b/kernel/utsname.c
@@ -48,6 +48,8 @@ static struct uts_namespace *clone_uts_ns(struct user_namespace *user_ns,
return ERR_PTR(err);
}
+ ns->ns.ops = &utsns_operations;
+
down_read(&uts_sem);
memcpy(&ns->name, &old_ns->name, sizeof(ns->name));
ns->user_ns = get_user_ns(user_ns);
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index da775f53f3fd1..4d4acaf7b4985 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -339,6 +339,7 @@ struct net *get_net_ns_by_fd(int fd)
{
struct proc_ns *ei;
struct file *file;
+ struct ns_common *ns;
struct net *net;
file = proc_ns_fget(fd);
@@ -346,8 +347,9 @@ struct net *get_net_ns_by_fd(int fd)
return ERR_CAST(file);
ei = get_proc_ns(file_inode(file));
- if (ei->ns_ops == &netns_operations)
- net = get_net(container_of(ei->ns, struct net, ns));
+ ns = ei->ns;
+ if (ns->ops == &netns_operations)
+ net = get_net(container_of(ns, struct net, ns));
else
net = ERR_PTR(-EINVAL);
@@ -386,6 +388,9 @@ EXPORT_SYMBOL_GPL(get_net_ns_by_pid);
static __net_init int net_ns_net_init(struct net *net)
{
+#ifdef CONFIG_NET_NS
+ net->ns.ops = &netns_operations;
+#endif
return ns_alloc_inum(&net->ns);
}
--
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