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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/decnet/dn_dev.c
View file

@ -42,6 +42,7 @@
#include <linux/notifier.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <net/net_namespace.h>
#include <net/neighbour.h>
#include <net/dst.h>
#include <net/flow.h>
@ -1462,7 +1463,7 @@ void __init dn_dev_init(void)
rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL);
rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr);
proc_net_fops_create("decnet_dev", S_IRUGO, &dn_dev_seq_fops);
proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops);
#ifdef CONFIG_SYSCTL
{
@ -1483,7 +1484,7 @@ void __exit dn_dev_cleanup(void)
}
#endif /* CONFIG_SYSCTL */
proc_net_remove("decnet_dev");
proc_net_remove(&init_net, "decnet_dev");
dn_dev_devices_off();
}