Add test for allocating and looking up ct entry in a
non-default ct zone with kfuncs bpf_{xdp,skb}_ct_alloc
and bpf_{xdp,skb}_ct_lookup.
Add negative tests for looking up ct entry in a different
ct zone to where it was allocated and with a different
direction.
Signed-off-by: Brad Cowie <brad@xxxxxxxxx>
---
v2 -> v3:
- Test both old and new bpf_ct_opts struct definitions
- Restore test for reserved options
- Add test for ct_zone_dir
v1 -> v2:
- Separate test changes into different patch
- Add test for allocating/looking up entry in non-default ct zone
---
tools/testing/selftests/bpf/config | 1 +
.../testing/selftests/bpf/prog_tests/bpf_nf.c | 6 +
.../testing/selftests/bpf/progs/test_bpf_nf.c | 117 ++++++++++++++++--
3 files changed, 114 insertions(+), 10 deletions(-)
diff --git a/tools/testing/selftests/bpf/config b/tools/testing/selftests/bpf/config
index eeabd798bc3a..2fb16da78dce 100644
--- a/tools/testing/selftests/bpf/config
+++ b/tools/testing/selftests/bpf/config
@@ -80,6 +80,7 @@ CONFIG_NETFILTER_XT_TARGET_CT=y
CONFIG_NETKIT=y
CONFIG_NF_CONNTRACK=y
CONFIG_NF_CONNTRACK_MARK=y
+CONFIG_NF_CONNTRACK_ZONES=y
CONFIG_NF_DEFRAG_IPV4=y
CONFIG_NF_DEFRAG_IPV6=y
CONFIG_NF_NAT=y
diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_nf.c b/tools/testing/selftests/bpf/prog_tests/bpf_nf.c
index b30ff6b3b81a..b73401a71e4a 100644
--- a/tools/testing/selftests/bpf/prog_tests/bpf_nf.c
+++ b/tools/testing/selftests/bpf/prog_tests/bpf_nf.c
@@ -122,6 +122,12 @@ static void test_bpf_nf_ct(int mode)
ASSERT_EQ(skel->bss->test_exist_lookup_mark, 43, "Test existing connection lookup ctmark");
ASSERT_EQ(skel->data->test_snat_addr, 0, "Test for source natting");
ASSERT_EQ(skel->data->test_dnat_addr, 0, "Test for destination natting");
+ ASSERT_EQ(skel->data->test_ct_zone_id_alloc_entry, 0, "Test for alloc new entry in specified ct zone");
+ ASSERT_EQ(skel->data->test_ct_zone_id_insert_entry, 0, "Test for insert new entry in specified ct zone");
+ ASSERT_EQ(skel->data->test_ct_zone_id_succ_lookup, 0, "Test for successful lookup in specified ct_zone");
+ ASSERT_EQ(skel->bss->test_ct_zone_dir_enoent_lookup, -ENOENT, "Test ENOENT for lookup with wrong ct zone dir");
+ ASSERT_EQ(skel->bss->test_ct_zone_id_enoent_lookup, -ENOENT, "Test ENOENT for lookup in wrong ct zone");
+
end:
if (client_fd != -1)
close(client_fd);
diff --git a/tools/testing/selftests/bpf/progs/test_bpf_nf.c b/tools/testing/selftests/bpf/progs/test_bpf_nf.c
index 77ad8adf68da..f57cd5d6d548 100644
--- a/tools/testing/selftests/bpf/progs/test_bpf_nf.c
+++ b/tools/testing/selftests/bpf/progs/test_bpf_nf.c
@@ -9,6 +9,9 @@
#define EINVAL 22
#define ENOENT 2
+#define NF_CT_ZONE_DIR_ORIG (1 << IP_CT_DIR_ORIGINAL)
+#define NF_CT_ZONE_DIR_REPL (1 << IP_CT_DIR_REPLY)
+
extern unsigned long CONFIG_HZ __kconfig;
int test_einval_bpf_tuple = 0;
@@ -22,6 +25,11 @@ int test_eafnosupport = 0;
int test_alloc_entry = -EINVAL;
int test_insert_entry = -EAFNOSUPPORT;
int test_succ_lookup = -ENOENT;
+int test_ct_zone_id_alloc_entry = -EINVAL;
+int test_ct_zone_id_insert_entry = -EAFNOSUPPORT;
+int test_ct_zone_id_succ_lookup = -ENOENT;
+int test_ct_zone_dir_enoent_lookup = 0;
+int test_ct_zone_id_enoent_lookup = 0;
u32 test_delta_timeout = 0;
u32 test_status = 0;
u32 test_insert_lookup_mark = 0;
@@ -48,6 +56,16 @@ struct bpf_ct_opts___local {
u8 reserved[3];
} __attribute__((preserve_access_index));
+struct bpf_ct_opts___new {
+ s32 netns_id;
+ s32 error;
+ u8 l4proto;
+ u8 dir;
+ u16 ct_zone_id;
+ u8 ct_zone_dir;
+ u8 reserved[3];
+} __attribute__((preserve_access_index));
+
struct nf_conn *bpf_xdp_ct_alloc(struct xdp_md *, struct bpf_sock_tuple *, u32,
struct bpf_ct_opts___local *, u32) __ksym;
struct nf_conn *bpf_xdp_ct_lookup(struct xdp_md *, struct bpf_sock_tuple *, u32,
@@ -84,16 +102,6 @@ nf_ct_test(struct nf_conn *(*lookup_fn)(void *, struct bpf_sock_tuple *, u32,
else
test_einval_bpf_tuple = opts_def.error;
- opts_def.reserved[0] = 1;
- ct = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
- sizeof(opts_def));
- opts_def.reserved[0] = 0;
- opts_def.l4proto = IPPROTO_TCP;
- if (ct)
- bpf_ct_release(ct);
- else
- test_einval_reserved = opts_def.error;
-
opts_def.netns_id = -2;
ct = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
sizeof(opts_def));
@@ -220,10 +228,98 @@ nf_ct_test(struct nf_conn *(*lookup_fn)(void *, struct bpf_sock_tuple *, u32,
}
}
+static __always_inline void
+nf_ct_opts_new_test(struct nf_conn *(*lookup_fn)(void *, struct bpf_sock_tuple *, u32,
+ struct bpf_ct_opts___new *, u32),
+ struct nf_conn *(*alloc_fn)(void *, struct bpf_sock_tuple *, u32,
+ struct bpf_ct_opts___new *, u32),
+ void *ctx)
+{
+ struct bpf_ct_opts___new opts_def = { .l4proto = IPPROTO_TCP, .netns_id = -1 };
+ struct bpf_sock_tuple bpf_tuple;
+ struct nf_conn *ct;
+
+ __builtin_memset(&bpf_tuple, 0, sizeof(bpf_tuple.ipv4));
+
+ opts_def.reserved[0] = 1;
+ ct = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
+ sizeof(opts_def));
+ opts_def.reserved[0] = 0;
+ opts_def.l4proto = IPPROTO_TCP;
+ if (ct)
+ bpf_ct_release(ct);
+ else
+ test_einval_reserved = opts_def.error;
+
+ bpf_tuple.ipv4.saddr = bpf_get_prandom_u32(); /* src IP */
+ bpf_tuple.ipv4.daddr = bpf_get_prandom_u32(); /* dst IP */
+ bpf_tuple.ipv4.sport = bpf_get_prandom_u32(); /* src port */
+ bpf_tuple.ipv4.dport = bpf_get_prandom_u32(); /* dst port */
+
+ /* use non-default ct zone */
+ opts_def.ct_zone_id = 10;
+ opts_def.ct_zone_dir = NF_CT_ZONE_DIR_ORIG;
+ ct = alloc_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
+ sizeof(opts_def));
+ if (ct) {
+ __u16 sport = bpf_get_prandom_u32();
+ __u16 dport = bpf_get_prandom_u32();
+ union nf_inet_addr saddr = {};
+ union nf_inet_addr daddr = {};
+ struct nf_conn *ct_ins;
+
+ bpf_ct_set_timeout(ct, 10000);
+
+ /* snat */
+ saddr.ip = bpf_get_prandom_u32();
+ bpf_ct_set_nat_info(ct, &saddr, sport, NF_NAT_MANIP_SRC___local);
+ /* dnat */
+ daddr.ip = bpf_get_prandom_u32();
+ bpf_ct_set_nat_info(ct, &daddr, dport, NF_NAT_MANIP_DST___local);
+
+ ct_ins = bpf_ct_insert_entry(ct);
+ if (ct_ins) {
+ struct nf_conn *ct_lk;
+
+ /* entry should exist in same ct zone we inserted it */
+ ct_lk = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4),
+ &opts_def, sizeof(opts_def));
+ if (ct_lk) {
+ bpf_ct_release(ct_lk);
+ test_ct_zone_id_succ_lookup = 0;
+ }
+
+ /* entry should not exist with wrong direction */
+ opts_def.ct_zone_dir = NF_CT_ZONE_DIR_REPL;
+ ct_lk = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4),
+ &opts_def, sizeof(opts_def));
+ opts_def.ct_zone_dir = NF_CT_ZONE_DIR_ORIG;
+ if (ct_lk)
+ bpf_ct_release(ct_lk);
+ else
+ test_ct_zone_dir_enoent_lookup = opts_def.error;
+
+ /* entry should not exist in default ct zone */
+ opts_def.ct_zone_id = 0;
+ ct_lk = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4),
+ &opts_def, sizeof(opts_def));
+ if (ct_lk)
+ bpf_ct_release(ct_lk);
+ else
+ test_ct_zone_id_enoent_lookup = opts_def.error;
+
+ bpf_ct_release(ct_ins);
+ test_ct_zone_id_insert_entry = 0;
+ }
+ test_ct_zone_id_alloc_entry = 0;
+ }
+}
+
SEC("xdp")
int nf_xdp_ct_test(struct xdp_md *ctx)
{
nf_ct_test((void *)bpf_xdp_ct_lookup, (void *)bpf_xdp_ct_alloc, ctx);
+ nf_ct_opts_new_test((void *)bpf_xdp_ct_lookup, (void *)bpf_xdp_ct_alloc, ctx);
return 0;
}
@@ -231,6 +327,7 @@ SEC("tc")
int nf_skb_ct_test(struct __sk_buff *ctx)
{
nf_ct_test((void *)bpf_skb_ct_lookup, (void *)bpf_skb_ct_alloc, ctx);
+ nf_ct_opts_new_test((void *)bpf_skb_ct_lookup, (void *)bpf_skb_ct_alloc, ctx);
return 0;
}
--
2.34.1
