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can: initial support for network namespaces

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This patch adds initial support for network namespaces. The changes only
enable support in the CAN raw, proc and af_can code. GW and BCM still
have their checks that ensure that they are used only from the main
namespace.

The patch boils down to moving the global structures, i.e. the global
filter list and their /proc stats, into a per-namespace structure and passing
around the corresponding "struct net" in a lot of different places.

Changes since v1:
 - rebased on current HEAD (2bfe01e)
 - fixed overlong line

Signed-off-by: Mario Kicherer <dev@kicherer.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Mario Kicherer
2017-02-21 12:19:47 +01:00
committed by Marc Kleine-Budde
parent dabf54dd1c
commit 8e8cda6d73
9 changed files with 242 additions and 179 deletions
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31
include/net/netns/can.h Normal file
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@@ -0,0 +1,31 @@
/*
* can in net namespaces
*/
#ifndef __NETNS_CAN_H__
#define __NETNS_CAN_H__
#include <linux/spinlock.h>
struct dev_rcv_lists;
struct netns_can {
#if IS_ENABLED(CONFIG_PROC_FS)
struct proc_dir_entry *proc_dir;
struct proc_dir_entry *pde_version;
struct proc_dir_entry *pde_stats;
struct proc_dir_entry *pde_reset_stats;
struct proc_dir_entry *pde_rcvlist_all;
struct proc_dir_entry *pde_rcvlist_fil;
struct proc_dir_entry *pde_rcvlist_inv;
struct proc_dir_entry *pde_rcvlist_sff;
struct proc_dir_entry *pde_rcvlist_eff;
struct proc_dir_entry *pde_rcvlist_err;
#endif
/* receive filters subscribed for 'all' CAN devices */
struct dev_rcv_lists *can_rx_alldev_list;
spinlock_t can_rcvlists_lock;
};
#endif /* __NETNS_CAN_H__ */