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[NET]: Make /proc/net per network namespace

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This patch makes /proc/net per network namespace.  It modifies the global
variables proc_net and proc_net_stat to be per network namespace.
The proc_net file helpers are modified to take a network namespace argument,
and all of their callers are fixed to pass &init_net for that argument.
This ensures that all of the /proc/net files are only visible and
usable in the initial network namespace until the code behind them
has been updated to be handle multiple network namespaces.

Making /proc/net per namespace is necessary as at least some files
in /proc/net depend upon the set of network devices which is per
network namespace, and even more files in /proc/net have contents
that are relevant to a single network namespace.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric W. Biederman
2007-09-12 12:01:34 +02:00
committed by David S. Miller
parent 07feaebfcc
commit 457c4cbc5a
84 changed files with 342 additions and 261 deletions
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44
include/linux/proc_fs.h
View File

@@ -7,6 +7,7 @@
#include <linux/magic.h>
#include <asm/atomic.h>
struct net;
struct completion;
/*
@@ -97,8 +98,6 @@ struct vmcore {
extern struct proc_dir_entry proc_root;
extern struct proc_dir_entry *proc_root_fs;
extern struct proc_dir_entry *proc_net;
extern struct proc_dir_entry *proc_net_stat;
extern struct proc_dir_entry *proc_bus;
extern struct proc_dir_entry *proc_root_driver;
extern struct proc_dir_entry *proc_root_kcore;
@@ -192,36 +191,21 @@ static inline struct proc_dir_entry *create_proc_info_entry(const char *name,
if (res) res->get_info=get_info;
return res;
}
static inline struct proc_dir_entry *proc_net_create(const char *name,
mode_t mode, get_info_t *get_info)
{
return create_proc_info_entry(name,mode,proc_net,get_info);
}
static inline struct proc_dir_entry *proc_net_fops_create(const char *name,
mode_t mode, const struct file_operations *fops)
{
struct proc_dir_entry *res = create_proc_entry(name, mode, proc_net);
if (res)
res->proc_fops = fops;
return res;
}
static inline void proc_net_remove(const char *name)
{
remove_proc_entry(name,proc_net);
}
extern struct proc_dir_entry *proc_net_create(struct net *net,
const char *name, mode_t mode, get_info_t *get_info);
extern struct proc_dir_entry *proc_net_fops_create(struct net *net,
const char *name, mode_t mode, const struct file_operations *fops);
extern void proc_net_remove(struct net *net, const char *name);
#else
#define proc_root_driver NULL
#define proc_net NULL
#define proc_bus NULL
#define proc_net_fops_create(name, mode, fops) ({ (void)(mode), NULL; })
#define proc_net_create(name, mode, info) ({ (void)(mode), NULL; })
static inline void proc_net_remove(const char *name) {}
#define proc_net_fops_create(net, name, mode, fops) ({ (void)(mode), NULL; })
#define proc_net_create(net, name, mode, info) ({ (void)(mode), NULL; })
static inline void proc_net_remove(struct net *net, const char *name) {}
static inline void proc_flush_task(struct task_struct *task) { }
@@ -281,6 +265,16 @@ 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;
}
static inline struct net *PROC_NET(const struct inode *inode)
{
return PDE_NET(PDE(inode));
}
struct proc_maps_private {
struct pid *pid;
struct task_struct *task;