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netfilter: nfnetlink: add struct nfgenmsg to struct nfnl_info and use it

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Update the nfnl_info structure to add a pointer to the nfnetlink header.
This simplifies the existing codebase since this header is usually
accessed. Update existing clients to use this new field.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso 2021-05-31 00:08:09 +02:00
parent 1a42624aec
commit ef4b65e53c
7 changed files with 42 additions and 70 deletions
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1
include/linux/netfilter/nfnetlink.h
View file

@ -11,6 +11,7 @@ struct nfnl_info {
struct net *net;
struct sock *sk;
const struct nlmsghdr *nlh;
const struct nfgenmsg *nfmsg;
struct netlink_ext_ack *extack;
};

23
net/netfilter/nf_conntrack_netlink.c
View file

@ -1528,7 +1528,7 @@ static int ctnetlink_del_conntrack(struct sk_buff *skb,
const struct nfnl_info *info,
const struct nlattr * const cda[])
{
struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
u8 family = info->nfmsg->nfgen_family;
struct nf_conntrack_tuple_hash *h;
struct nf_conntrack_tuple tuple;
struct nf_conntrack_zone zone;
@ -1541,12 +1541,12 @@ static int ctnetlink_del_conntrack(struct sk_buff *skb,
if (cda[CTA_TUPLE_ORIG])
err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG,
nfmsg->nfgen_family, &zone);
family, &zone);
else if (cda[CTA_TUPLE_REPLY])
err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY,
nfmsg->nfgen_family, &zone);
family, &zone);
else {
u_int8_t u3 = nfmsg->version ? nfmsg->nfgen_family : AF_UNSPEC;
u_int8_t u3 = info->nfmsg->version ? family : AF_UNSPEC;
return ctnetlink_flush_conntrack(info->net, cda,
NETLINK_CB(skb).portid,
@ -1586,8 +1586,7 @@ static int ctnetlink_get_conntrack(struct sk_buff *skb,
const struct nfnl_info *info,
const struct nlattr * const cda[])
{
struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
u_int8_t u3 = nfmsg->nfgen_family;
u_int8_t u3 = info->nfmsg->nfgen_family;
struct nf_conntrack_tuple_hash *h;
struct nf_conntrack_tuple tuple;
struct nf_conntrack_zone zone;
@ -2363,10 +2362,9 @@ static int ctnetlink_new_conntrack(struct sk_buff *skb,
const struct nfnl_info *info,
const struct nlattr * const cda[])
{
struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
struct nf_conntrack_tuple otuple, rtuple;
struct nf_conntrack_tuple_hash *h = NULL;
u_int8_t u3 = nfmsg->nfgen_family;
u_int8_t u3 = info->nfmsg->nfgen_family;
struct nf_conntrack_zone zone;
struct nf_conn *ct;
int err;
@ -3259,8 +3257,7 @@ static int ctnetlink_get_expect(struct sk_buff *skb,
const struct nfnl_info *info,
const struct nlattr * const cda[])
{
struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
u_int8_t u3 = nfmsg->nfgen_family;
u_int8_t u3 = info->nfmsg->nfgen_family;
struct nf_conntrack_tuple tuple;
struct nf_conntrack_expect *exp;
struct nf_conntrack_zone zone;
@ -3349,8 +3346,7 @@ static int ctnetlink_del_expect(struct sk_buff *skb,
const struct nfnl_info *info,
const struct nlattr * const cda[])
{
struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
u_int8_t u3 = nfmsg->nfgen_family;
u_int8_t u3 = info->nfmsg->nfgen_family;
struct nf_conntrack_expect *exp;
struct nf_conntrack_tuple tuple;
struct nf_conntrack_zone zone;
@ -3601,8 +3597,7 @@ static int ctnetlink_new_expect(struct sk_buff *skb,
const struct nfnl_info *info,
const struct nlattr * const cda[])
{
struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
u_int8_t u3 = nfmsg->nfgen_family;
u_int8_t u3 = info->nfmsg->nfgen_family;
struct nf_conntrack_tuple tuple;
struct nf_conntrack_expect *exp;
struct nf_conntrack_zone zone;

55
net/netfilter/nf_tables_api.c
View file

@ -861,10 +861,9 @@ static int nft_netlink_dump_start_rcu(struct sock *nlsk, struct sk_buff *skb,
static int nf_tables_gettable(struct sk_buff *skb, const struct nfnl_info *info,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
struct netlink_ext_ack *extack = info->extack;
u8 genmask = nft_genmask_cur(info->net);
int family = nfmsg->nfgen_family;
u8 family = info->nfmsg->nfgen_family;
const struct nft_table *table;
struct net *net = info->net;
struct sk_buff *skb2;
@ -1059,10 +1058,9 @@ static int nf_tables_newtable(struct sk_buff *skb, const struct nfnl_info *info,
const struct nlattr * const nla[])
{
struct nftables_pernet *nft_net = nft_pernet(info->net);
const struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
struct netlink_ext_ack *extack = info->extack;
u8 genmask = nft_genmask_next(info->net);
int family = nfmsg->nfgen_family;
u8 family = info->nfmsg->nfgen_family;
struct net *net = info->net;
const struct nlattr *attr;
struct nft_table *table;
@ -1254,10 +1252,9 @@ static int nft_flush(struct nft_ctx *ctx, int family)
static int nf_tables_deltable(struct sk_buff *skb, const struct nfnl_info *info,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
struct netlink_ext_ack *extack = info->extack;
u8 genmask = nft_genmask_next(info->net);
int family = nfmsg->nfgen_family;
u8 family = info->nfmsg->nfgen_family;
struct net *net = info->net;
const struct nlattr *attr;
struct nft_table *table;
@ -1627,10 +1624,9 @@ static int nf_tables_dump_chains(struct sk_buff *skb,
static int nf_tables_getchain(struct sk_buff *skb, const struct nfnl_info *info,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
struct netlink_ext_ack *extack = info->extack;
u8 genmask = nft_genmask_cur(info->net);
int family = nfmsg->nfgen_family;
u8 family = info->nfmsg->nfgen_family;
const struct nft_chain *chain;
struct net *net = info->net;
struct nft_table *table;
@ -2355,10 +2351,9 @@ static int nf_tables_newchain(struct sk_buff *skb, const struct nfnl_info *info,
const struct nlattr * const nla[])
{
struct nftables_pernet *nft_net = nft_pernet(info->net);
const struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
struct netlink_ext_ack *extack = info->extack;
u8 genmask = nft_genmask_next(info->net);
int family = nfmsg->nfgen_family;
u8 family = info->nfmsg->nfgen_family;
struct nft_chain *chain = NULL;
struct net *net = info->net;
const struct nlattr *attr;
@ -2453,10 +2448,9 @@ static int nf_tables_newchain(struct sk_buff *skb, const struct nfnl_info *info,
static int nf_tables_delchain(struct sk_buff *skb, const struct nfnl_info *info,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
struct netlink_ext_ack *extack = info->extack;
u8 genmask = nft_genmask_next(info->net);
int family = nfmsg->nfgen_family;
u8 family = info->nfmsg->nfgen_family;
struct net *net = info->net;
const struct nlattr *attr;
struct nft_table *table;
@ -3080,10 +3074,9 @@ static int nf_tables_dump_rules_done(struct netlink_callback *cb)
static int nf_tables_getrule(struct sk_buff *skb, const struct nfnl_info *info,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
struct netlink_ext_ack *extack = info->extack;
u8 genmask = nft_genmask_cur(info->net);
int family = nfmsg->nfgen_family;
u8 family = info->nfmsg->nfgen_family;
const struct nft_chain *chain;
const struct nft_rule *rule;
struct net *net = info->net;
@ -3221,13 +3214,12 @@ static int nf_tables_newrule(struct sk_buff *skb, const struct nfnl_info *info,
const struct nlattr * const nla[])
{
struct nftables_pernet *nft_net = nft_pernet(info->net);
const struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
struct netlink_ext_ack *extack = info->extack;
unsigned int size, i, n, ulen = 0, usize = 0;
u8 genmask = nft_genmask_next(info->net);
struct nft_rule *rule, *old_rule = NULL;
struct nft_expr_info *expr_info = NULL;
int family = nfmsg->nfgen_family;
u8 family = info->nfmsg->nfgen_family;
struct net *net = info->net;
struct nft_flow_rule *flow;
struct nft_userdata *udata;
@ -3459,15 +3451,15 @@ static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
static int nf_tables_delrule(struct sk_buff *skb, const struct nfnl_info *info,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
struct netlink_ext_ack *extack = info->extack;
int family = nfmsg->nfgen_family, err = 0;
u8 genmask = nft_genmask_next(info->net);
u8 family = info->nfmsg->nfgen_family;
struct nft_chain *chain = NULL;
struct net *net = info->net;
struct nft_table *table;
struct nft_rule *rule;
struct nft_ctx ctx;
int err = 0;
table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
NETLINK_CB(skb).portid);
@ -4050,7 +4042,6 @@ static int nf_tables_dump_sets_done(struct netlink_callback *cb)
static int nf_tables_getset(struct sk_buff *skb, const struct nfnl_info *info,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
struct netlink_ext_ack *extack = info->extack;
u8 genmask = nft_genmask_cur(info->net);
struct net *net = info->net;
@ -4078,7 +4069,7 @@ static int nf_tables_getset(struct sk_buff *skb, const struct nfnl_info *info,
}
/* Only accept unspec with dump */
if (nfmsg->nfgen_family == NFPROTO_UNSPEC)
if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
return -EAFNOSUPPORT;
if (!nla[NFTA_SET_TABLE])
return -EINVAL;
@ -4171,11 +4162,10 @@ static int nf_tables_set_desc_parse(struct nft_set_desc *desc,
static int nf_tables_newset(struct sk_buff *skb, const struct nfnl_info *info,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
u32 ktype, dtype, flags, policy, gc_int, objtype;
struct netlink_ext_ack *extack = info->extack;
u8 genmask = nft_genmask_next(info->net);
int family = nfmsg->nfgen_family;
u8 family = info->nfmsg->nfgen_family;
const struct nft_set_ops *ops;
struct nft_expr *expr = NULL;
struct net *net = info->net;
@ -4475,7 +4465,6 @@ static void nft_set_destroy(const struct nft_ctx *ctx, struct nft_set *set)
static int nf_tables_delset(struct sk_buff *skb, const struct nfnl_info *info,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
struct netlink_ext_ack *extack = info->extack;
u8 genmask = nft_genmask_next(info->net);
struct net *net = info->net;
@ -4484,7 +4473,7 @@ static int nf_tables_delset(struct sk_buff *skb, const struct nfnl_info *info,
struct nft_ctx ctx;
int err;
if (nfmsg->nfgen_family == NFPROTO_UNSPEC)
if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
return -EAFNOSUPPORT;
if (nla[NFTA_SET_TABLE] == NULL)
return -EINVAL;
@ -6527,11 +6516,10 @@ static int nf_tables_updobj(const struct nft_ctx *ctx,
static int nf_tables_newobj(struct sk_buff *skb, const struct nfnl_info *info,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
struct netlink_ext_ack *extack = info->extack;
u8 genmask = nft_genmask_next(info->net);
u8 family = info->nfmsg->nfgen_family;
const struct nft_object_type *type;
int family = nfmsg->nfgen_family;
struct net *net = info->net;
struct nft_table *table;
struct nft_object *obj;
@ -6783,10 +6771,9 @@ static int nf_tables_dump_obj_done(struct netlink_callback *cb)
static int nf_tables_getobj(struct sk_buff *skb, const struct nfnl_info *info,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
struct netlink_ext_ack *extack = info->extack;
u8 genmask = nft_genmask_cur(info->net);
int family = nfmsg->nfgen_family;
u8 family = info->nfmsg->nfgen_family;
const struct nft_table *table;
struct net *net = info->net;
struct nft_object *obj;
@ -6873,10 +6860,9 @@ static void nft_obj_destroy(const struct nft_ctx *ctx, struct nft_object *obj)
static int nf_tables_delobj(struct sk_buff *skb, const struct nfnl_info *info,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
struct netlink_ext_ack *extack = info->extack;
u8 genmask = nft_genmask_next(info->net);
int family = nfmsg->nfgen_family;
u8 family = info->nfmsg->nfgen_family;
struct net *net = info->net;
const struct nlattr *attr;
struct nft_table *table;
@ -7304,12 +7290,11 @@ static int nf_tables_newflowtable(struct sk_buff *skb,
const struct nfnl_info *info,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
struct netlink_ext_ack *extack = info->extack;
struct nft_flowtable_hook flowtable_hook;
u8 genmask = nft_genmask_next(info->net);
u8 family = info->nfmsg->nfgen_family;
const struct nf_flowtable_type *type;
int family = nfmsg->nfgen_family;
struct nft_flowtable *flowtable;
struct nft_hook *hook, *next;
struct net *net = info->net;
@ -7493,10 +7478,9 @@ static int nf_tables_delflowtable(struct sk_buff *skb,
const struct nfnl_info *info,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
struct netlink_ext_ack *extack = info->extack;
u8 genmask = nft_genmask_next(info->net);
int family = nfmsg->nfgen_family;
u8 family = info->nfmsg->nfgen_family;
struct nft_flowtable *flowtable;
struct net *net = info->net;
const struct nlattr *attr;
@ -7688,9 +7672,8 @@ static int nf_tables_getflowtable(struct sk_buff *skb,
const struct nfnl_info *info,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
u8 genmask = nft_genmask_cur(info->net);
int family = nfmsg->nfgen_family;
u8 family = info->nfmsg->nfgen_family;
struct nft_flowtable *flowtable;
const struct nft_table *table;
struct net *net = info->net;

2
net/netfilter/nfnetlink.c
View file

@ -256,6 +256,7 @@ static int nfnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
.net = net,
.sk = nfnlnet->nfnl,
.nlh = nlh,
.nfmsg = nlmsg_data(nlh),
.extack = extack,
};
@ -491,6 +492,7 @@ static void nfnetlink_rcv_batch(struct sk_buff *skb, struct nlmsghdr *nlh,
.net = net,
.sk = nfnlnet->nfnl,
.nlh = nlh,
.nfmsg = nlmsg_data(nlh),
.extack = &extack,
};

5
net/netfilter/nfnetlink_log.c
View file

@ -871,15 +871,14 @@ static int nfulnl_recv_config(struct sk_buff *skb, const struct nfnl_info *info,
const struct nlattr * const nfula[])
{
struct nfnl_log_net *log = nfnl_log_pernet(info->net);
struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
u_int16_t group_num = ntohs(nfmsg->res_id);
u_int16_t group_num = ntohs(info->nfmsg->res_id);
struct nfulnl_msg_config_cmd *cmd = NULL;
struct nfulnl_instance *inst;
u16 flags = 0;
int ret = 0;
if (nfula[NFULA_CFG_CMD]) {
u_int8_t pf = nfmsg->nfgen_family;
u_int8_t pf = info->nfmsg->nfgen_family;
cmd = nla_data(nfula[NFULA_CFG_CMD]);
/* Commands without queue context */

9
net/netfilter/nfnetlink_queue.c
View file

@ -1051,8 +1051,7 @@ static int nfqnl_recv_verdict_batch(struct sk_buff *skb,
const struct nlattr * const nfqa[])
{
struct nfnl_queue_net *q = nfnl_queue_pernet(info->net);
struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
u16 queue_num = ntohs(nfmsg->res_id);
u16 queue_num = ntohs(info->nfmsg->res_id);
struct nf_queue_entry *entry, *tmp;
struct nfqnl_msg_verdict_hdr *vhdr;
struct nfqnl_instance *queue;
@ -1160,8 +1159,7 @@ static int nfqnl_recv_verdict(struct sk_buff *skb, const struct nfnl_info *info,
const struct nlattr * const nfqa[])
{
struct nfnl_queue_net *q = nfnl_queue_pernet(info->net);
struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
u_int16_t queue_num = ntohs(nfmsg->res_id);
u_int16_t queue_num = ntohs(info->nfmsg->res_id);
struct nfqnl_msg_verdict_hdr *vhdr;
enum ip_conntrack_info ctinfo;
struct nfqnl_instance *queue;
@ -1243,8 +1241,7 @@ static int nfqnl_recv_config(struct sk_buff *skb, const struct nfnl_info *info,
const struct nlattr * const nfqa[])
{
struct nfnl_queue_net *q = nfnl_queue_pernet(info->net);
struct nfgenmsg *nfmsg = nlmsg_data(info->nlh);
u_int16_t queue_num = ntohs(nfmsg->res_id);
u_int16_t queue_num = ntohs(info->nfmsg->res_id);
struct nfqnl_msg_config_cmd *cmd = NULL;
struct nfqnl_instance *queue;
__u32 flags = 0, mask = 0;

17
net/netfilter/nft_compat.c
View file

@ -625,7 +625,7 @@ static int nfnl_compat_get_rcu(struct sk_buff *skb,
const struct nfnl_info *info,
const struct nlattr * const tb[])
{
struct nfgenmsg *nfmsg;
u8 family = info->nfmsg->nfgen_family;
const char *name, *fmt;
struct sk_buff *skb2;
int ret = 0, target;
@ -640,9 +640,7 @@ static int nfnl_compat_get_rcu(struct sk_buff *skb,
rev = ntohl(nla_get_be32(tb[NFTA_COMPAT_REV]));
target = ntohl(nla_get_be32(tb[NFTA_COMPAT_TYPE]));
nfmsg = nlmsg_data(info->nlh);
switch(nfmsg->nfgen_family) {
switch(family) {
case AF_INET:
fmt = "ipt_%s";
break;
@ -656,8 +654,7 @@ static int nfnl_compat_get_rcu(struct sk_buff *skb,
fmt = "arpt_%s";
break;
default:
pr_err("nft_compat: unsupported protocol %d\n",
nfmsg->nfgen_family);
pr_err("nft_compat: unsupported protocol %d\n", family);
return -EINVAL;
}
@ -665,9 +662,8 @@ static int nfnl_compat_get_rcu(struct sk_buff *skb,
return -EINVAL;
rcu_read_unlock();
try_then_request_module(xt_find_revision(nfmsg->nfgen_family, name,
rev, target, &ret),
fmt, name);
try_then_request_module(xt_find_revision(family, name, rev, target, &ret),
fmt, name);
if (ret < 0)
goto out_put;
@ -682,8 +678,7 @@ static int nfnl_compat_get_rcu(struct sk_buff *skb,
info->nlh->nlmsg_seq,
NFNL_MSG_TYPE(info->nlh->nlmsg_type),
NFNL_MSG_COMPAT_GET,
nfmsg->nfgen_family,
name, ret, target) <= 0) {
family, name, ret, target) <= 0) {
kfree_skb(skb2);
goto out_put;
}