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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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5
net/ipv4/udp.c
View File

@@ -98,6 +98,7 @@
#include <linux/skbuff.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <net/net_namespace.h>
#include <net/icmp.h>
#include <net/route.h>
#include <net/checksum.h>
@@ -1566,7 +1567,7 @@ int udp_proc_register(struct udp_seq_afinfo *afinfo)
afinfo->seq_fops->llseek = seq_lseek;
afinfo->seq_fops->release = seq_release_private;
p = proc_net_fops_create(afinfo->name, S_IRUGO, afinfo->seq_fops);
p = proc_net_fops_create(&init_net, afinfo->name, S_IRUGO, afinfo->seq_fops);
if (p)
p->data = afinfo;
else
@@ -1578,7 +1579,7 @@ void udp_proc_unregister(struct udp_seq_afinfo *afinfo)
{
if (!afinfo)
return;
proc_net_remove(afinfo->name);
proc_net_remove(&init_net, afinfo->name);
memset(afinfo->seq_fops, 0, sizeof(*afinfo->seq_fops));
}