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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 <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Eric W. Biederman 2007-09-12 12:01:34 +02:00 • committed by David S. Miller
commit 457c4cbc5a
84 changed files with 342 additions and 261 deletions
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3
net/netlink/af_netlink.c
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@ -57,6 +57,7 @@
#include <linux/selinux.h>
#include <linux/mutex.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/scm.h>
#include <net/netlink.h>
@ -1927,7 +1928,7 @@ static int __init netlink_proto_init(void)
sock_register(&netlink_family_ops);
#ifdef CONFIG_PROC_FS
proc_net_fops_create("netlink", 0, &netlink_seq_fops);
proc_net_fops_create(&init_net, "netlink", 0, &netlink_seq_fops);
#endif
/* The netlink device handler may be needed early. */
rtnetlink_init();