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Subject[PATCH 6/7] proc_net: Simplify network namespace lookup.

Since the network namespace is recorded in the
superblock we don't need to remember it on
each directory under /proc/net.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
---
fs/proc/generic.c | 17 -----------------
fs/proc/proc_net.c | 13 ++++++++++---
include/linux/proc_fs.h | 5 -----
3 files changed, 10 insertions(+), 25 deletions(-)
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 8669cf6..6db30a8 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -658,23 +658,6 @@ struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode,
return ent;
}

-struct proc_dir_entry *proc_net_mkdir(struct net *net, const char *name,
- struct proc_dir_entry *parent)
-{
- struct proc_dir_entry *ent;
-
- ent = __proc_create(&parent, name, S_IFDIR | S_IRUGO | S_IXUGO, 2);
- if (ent) {
- ent->data = net;
- if (proc_register(parent, ent) < 0) {
- kfree(ent);
- ent = NULL;
- }
- }
- return ent;
-}
-EXPORT_SYMBOL_GPL(proc_net_mkdir);
-
struct proc_dir_entry *proc_mkdir(const char *name,
struct proc_dir_entry *parent)
{
diff --git a/fs/proc/proc_net.c b/fs/proc/proc_net.c
index 4a7551a..baabb9c 100644
--- a/fs/proc/proc_net.c
+++ b/fs/proc/proc_net.c
@@ -31,7 +31,7 @@ static struct file_system_type proc_net_fs_type;

static struct net *get_proc_net(const struct inode *inode)
{
- return maybe_get_net(PDE_NET(PDE(inode)));
+ return maybe_get_net(inode->i_sb->s_fs_info);
}

int seq_open_net(struct inode *ino, struct file *f,
@@ -214,6 +214,15 @@ struct proc_dir_entry *proc_net_fops_create(struct net *net,
}
EXPORT_SYMBOL_GPL(proc_net_fops_create);

+struct proc_dir_entry *proc_net_mkdir(struct net *net, const char *name,
+ struct proc_dir_entry *parent)
+{
+ if (!parent)
+ parent = net->proc_net;
+ return proc_mkdir(name, parent);
+}
+EXPORT_SYMBOL_GPL(proc_net_mkdir);
+
void proc_net_remove(struct net *net, const char *name)
{
remove_proc_entry(name, net->proc_net);
@@ -308,8 +317,6 @@ static __net_init int proc_net_ns_init(struct net *net)
if (!netd)
goto out;

- netd->data = net;
-
err = -EEXIST;
net_statd = proc_net_mkdir(net, "stat", netd);
if (!net_statd)
diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index 3505a72..52cc6bd 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -300,11 +300,6 @@ static inline struct proc_dir_entry *PDE(const struct inode *inode)
return PROC_I(inode)->pde;
}

-static inline struct net *PDE_NET(struct proc_dir_entry *pde)
-{
- return pde->parent->data;
-}
-
struct proc_maps_private {
struct pid *pid;
struct task_struct *task;
--
1.5.3.rc6.17.g1911


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