From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/net/netfilter/xt_owner.c | 100 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 100 insertions(+) create mode 100644 kernel/net/netfilter/xt_owner.c (limited to 'kernel/net/netfilter/xt_owner.c') diff --git a/kernel/net/netfilter/xt_owner.c b/kernel/net/netfilter/xt_owner.c new file mode 100644 index 000000000..ca2e577ed --- /dev/null +++ b/kernel/net/netfilter/xt_owner.c @@ -0,0 +1,100 @@ +/* + * Kernel module to match various things tied to sockets associated with + * locally generated outgoing packets. + * + * (C) 2000 Marc Boucher + * + * Copyright © CC Computer Consultants GmbH, 2007 - 2008 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include +#include +#include +#include +#include +#include + +static int owner_check(const struct xt_mtchk_param *par) +{ + struct xt_owner_match_info *info = par->matchinfo; + + /* For now only allow adding matches from the initial user namespace */ + if ((info->match & (XT_OWNER_UID|XT_OWNER_GID)) && + (current_user_ns() != &init_user_ns)) + return -EINVAL; + return 0; +} + +static bool +owner_mt(const struct sk_buff *skb, struct xt_action_param *par) +{ + const struct xt_owner_match_info *info = par->matchinfo; + const struct file *filp; + + if (skb->sk == NULL || skb->sk->sk_socket == NULL) + return (info->match ^ info->invert) == 0; + else if (info->match & info->invert & XT_OWNER_SOCKET) + /* + * Socket exists but user wanted ! --socket-exists. + * (Single ampersands intended.) + */ + return false; + + filp = skb->sk->sk_socket->file; + if (filp == NULL) + return ((info->match ^ info->invert) & + (XT_OWNER_UID | XT_OWNER_GID)) == 0; + + if (info->match & XT_OWNER_UID) { + kuid_t uid_min = make_kuid(&init_user_ns, info->uid_min); + kuid_t uid_max = make_kuid(&init_user_ns, info->uid_max); + if ((uid_gte(filp->f_cred->fsuid, uid_min) && + uid_lte(filp->f_cred->fsuid, uid_max)) ^ + !(info->invert & XT_OWNER_UID)) + return false; + } + + if (info->match & XT_OWNER_GID) { + kgid_t gid_min = make_kgid(&init_user_ns, info->gid_min); + kgid_t gid_max = make_kgid(&init_user_ns, info->gid_max); + if ((gid_gte(filp->f_cred->fsgid, gid_min) && + gid_lte(filp->f_cred->fsgid, gid_max)) ^ + !(info->invert & XT_OWNER_GID)) + return false; + } + + return true; +} + +static struct xt_match owner_mt_reg __read_mostly = { + .name = "owner", + .revision = 1, + .family = NFPROTO_UNSPEC, + .checkentry = owner_check, + .match = owner_mt, + .matchsize = sizeof(struct xt_owner_match_info), + .hooks = (1 << NF_INET_LOCAL_OUT) | + (1 << NF_INET_POST_ROUTING), + .me = THIS_MODULE, +}; + +static int __init owner_mt_init(void) +{ + return xt_register_match(&owner_mt_reg); +} + +static void __exit owner_mt_exit(void) +{ + xt_unregister_match(&owner_mt_reg); +} + +module_init(owner_mt_init); +module_exit(owner_mt_exit); +MODULE_AUTHOR("Jan Engelhardt "); +MODULE_DESCRIPTION("Xtables: socket owner matching"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("ipt_owner"); +MODULE_ALIAS("ip6t_owner"); -- cgit 1.2.3-korg