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netfilter: nf_tables: Attach process info to NFT_MSG_NEWGEN notifications 

This is helpful for 'nft monitor' to track which process caused a given
change to the ruleset.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Phil Sutter 2017-07-19 16:32:23 +02:00 committed by Pablo Neira Ayuso
parent 0b35f6031a
commit 784b4e612d
2 changed files with 6 additions and 1 deletions
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2
include/uapi/linux/netfilter/nf_tables.h
View File

@ -1221,6 +1221,8 @@ enum nft_objref_attributes {
enum nft_gen_attributes {
NFTA_GEN_UNSPEC,
NFTA_GEN_ID,
NFTA_GEN_PROC_PID,
NFTA_GEN_PROC_NAME,
__NFTA_GEN_MAX
};
#define NFTA_GEN_MAX (__NFTA_GEN_MAX - 1)

5
net/netfilter/nf_tables_api.c
View File

@ -4657,6 +4657,7 @@ static int nf_tables_fill_gen_info(struct sk_buff *skb, struct net *net,
{
struct nlmsghdr *nlh;
struct nfgenmsg *nfmsg;
char buf[TASK_COMM_LEN];
int event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWGEN);
nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), 0);
@ -4668,7 +4669,9 @@ static int nf_tables_fill_gen_info(struct sk_buff *skb, struct net *net,
nfmsg->version = NFNETLINK_V0;
nfmsg->res_id = htons(net->nft.base_seq & 0xffff);
if (nla_put_be32(skb, NFTA_GEN_ID, htonl(net->nft.base_seq)))
if (nla_put_be32(skb, NFTA_GEN_ID, htonl(net->nft.base_seq)) ||
nla_put_be32(skb, NFTA_GEN_PROC_PID, htonl(task_pid_nr(current))) ||
nla_put_string(skb, NFTA_GEN_PROC_NAME, get_task_comm(buf, current)))
goto nla_put_failure;
nlmsg_end(skb, nlh);