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Date: Thu, 10 Apr 2008 19:06:24 +0400 From: Pavel Emelyanov <xemul@...nvz.org> To: Linux Netdev List <netdev@...r.kernel.org> CC: Daniel Lezcano <dlezcano@...ibm.com>, Denis Lunev <den@...nvz.org>, Linux Containers <containers@...ts.osdl.org>, Benjamin Thery <benjamin.thery@...l.net> Subject: [PATCH 3/14][TUN]: Introduce the tun_net structure. This is the first step in making tuntap devices work in net namespaces. The structure mentioned is pointed by generic net pointer with tun_net_id id, and tun driver fills one on its load. It will contain only the tun devices list. So declare this structure and introduce net init and exit hooks. Signed-off-by: Pavel Emelyanov <xemul@...nvz.org> --- drivers/net/tun.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 files changed, 52 insertions(+), 1 deletions(-) diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 7b816a0..9bfba02 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -63,6 +63,7 @@ #include <linux/if_tun.h> #include <linux/crc32.h> #include <net/net_namespace.h> +#include <net/netns/generic.h> #include <asm/system.h> #include <asm/uaccess.h> @@ -73,6 +74,11 @@ static int debug; /* Network device part of the driver */ +static unsigned int tun_net_id; +struct tun_net { + struct list_head dev_list; +}; + static LIST_HEAD(tun_dev_list); static const struct ethtool_ops tun_ethtool_ops; @@ -873,6 +879,37 @@ static const struct ethtool_ops tun_ethtool_ops = { .set_rx_csum = tun_set_rx_csum }; +static int tun_init_net(struct net *net) +{ + struct tun_net *tn; + + tn = kmalloc(sizeof(*tn), GFP_KERNEL); + if (tn == NULL) + return -ENOMEM; + + INIT_LIST_HEAD(&tn->dev_list); + + if (net_assign_generic(net, tun_net_id, tn)) { + kfree(tn); + return -ENOMEM; + } + + return 0; +} + +static void tun_exit_net(struct net *net) +{ + struct tun_net *tn; + + tn = net_generic(net, tun_net_id); + kfree(tn); +} + +static struct pernet_operations tun_net_ops = { + .init = tun_init_net, + .exit = tun_exit_net, +}; + static int __init tun_init(void) { int ret = 0; @@ -880,9 +917,22 @@ static int __init tun_init(void) printk(KERN_INFO "tun: %s, %s\n", DRV_DESCRIPTION, DRV_VERSION); printk(KERN_INFO "tun: %s\n", DRV_COPYRIGHT); + ret = register_pernet_gen_device(&tun_net_id, &tun_net_ops); + if (ret) { + printk(KERN_ERR "tun: Can't register pernet ops\n"); + goto err_pernet; + } + ret = misc_register(&tun_miscdev); - if (ret) + if (ret) { printk(KERN_ERR "tun: Can't register misc device %d\n", TUN_MINOR); + goto err_misc; + } + return 0; + +err_misc: + unregister_pernet_gen_device(tun_net_id, &tun_net_ops); +err_pernet: return ret; } @@ -899,6 +949,7 @@ static void tun_cleanup(void) } rtnl_unlock(); + unregister_pernet_gen_device(tun_net_id, &tun_net_ops); } module_init(tun_init); -- 1.5.3.4 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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