From: John Fastabend <john.fastabend@gmail.com>
To: martin.lau@kernel.org, jakub@cloudflare.com
Cc: john.fastabend@gmail.com, bpf@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH bpf v2 2/2] bpf: sockmap, add af_unix test with both sockets in map
Date: Wed, 22 Nov 2023 11:24:52 -0800 [thread overview]
Message-ID: <20231122192452.335312-3-john.fastabend@gmail.com> (raw)
In-Reply-To: <20231122192452.335312-1-john.fastabend@gmail.com>
This adds a test where both pairs of a af_unix paired socket are put into
a BPF map. This ensures that when we tear down the af_unix pair we don't
have any issues on sockmap side with ordering and reference counting.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
---
.../selftests/bpf/prog_tests/sockmap_listen.c | 39 ++++++++++++++++---
.../selftests/bpf/progs/test_sockmap_listen.c | 7 ++++
2 files changed, 40 insertions(+), 6 deletions(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c b/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c
index 8df8cbb447f1..90e97907c1c1 100644
--- a/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c
+++ b/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c
@@ -1824,8 +1824,10 @@ static void inet_unix_skb_redir_to_connected(struct test_sockmap_listen *skel,
xbpf_prog_detach2(verdict, sock_map, BPF_SK_SKB_VERDICT);
}
-static void unix_inet_redir_to_connected(int family, int type, int sock_mapfd,
- int verd_mapfd, enum redir_mode mode)
+static void unix_inet_redir_to_connected(int family, int type,
+ int sock_mapfd, int nop_mapfd,
+ int verd_mapfd,
+ enum redir_mode mode)
{
const char *log_prefix = redir_mode_str(mode);
int c0, c1, p0, p1;
@@ -1849,6 +1851,12 @@ static void unix_inet_redir_to_connected(int family, int type, int sock_mapfd,
if (err)
goto close;
+ if (nop_mapfd >= 0) {
+ err = add_to_sockmap(nop_mapfd, c0, c1);
+ if (err)
+ goto close;
+ }
+
n = write(c1, "a", 1);
if (n < 0)
FAIL_ERRNO("%s: write", log_prefix);
@@ -1883,6 +1891,7 @@ static void unix_inet_skb_redir_to_connected(struct test_sockmap_listen *skel,
struct bpf_map *inner_map, int family)
{
int verdict = bpf_program__fd(skel->progs.prog_skb_verdict);
+ int nop_map = bpf_map__fd(skel->maps.nop_map);
int verdict_map = bpf_map__fd(skel->maps.verdict_map);
int sock_map = bpf_map__fd(inner_map);
int err;
@@ -1892,14 +1901,32 @@ static void unix_inet_skb_redir_to_connected(struct test_sockmap_listen *skel,
return;
skel->bss->test_ingress = false;
- unix_inet_redir_to_connected(family, SOCK_DGRAM, sock_map, verdict_map,
+ unix_inet_redir_to_connected(family, SOCK_DGRAM,
+ sock_map, -1, verdict_map,
+ REDIR_EGRESS);
+ unix_inet_redir_to_connected(family, SOCK_DGRAM,
+ sock_map, -1, verdict_map,
REDIR_EGRESS);
- unix_inet_redir_to_connected(family, SOCK_STREAM, sock_map, verdict_map,
+
+ unix_inet_redir_to_connected(family, SOCK_DGRAM,
+ sock_map, nop_map, verdict_map,
+ REDIR_EGRESS);
+ unix_inet_redir_to_connected(family, SOCK_STREAM,
+ sock_map, nop_map, verdict_map,
REDIR_EGRESS);
skel->bss->test_ingress = true;
- unix_inet_redir_to_connected(family, SOCK_DGRAM, sock_map, verdict_map,
+ unix_inet_redir_to_connected(family, SOCK_DGRAM,
+ sock_map, -1, verdict_map,
+ REDIR_INGRESS);
+ unix_inet_redir_to_connected(family, SOCK_STREAM,
+ sock_map, -1, verdict_map,
+ REDIR_INGRESS);
+
+ unix_inet_redir_to_connected(family, SOCK_DGRAM,
+ sock_map, nop_map, verdict_map,
REDIR_INGRESS);
- unix_inet_redir_to_connected(family, SOCK_STREAM, sock_map, verdict_map,
+ unix_inet_redir_to_connected(family, SOCK_STREAM,
+ sock_map, nop_map, verdict_map,
REDIR_INGRESS);
xbpf_prog_detach2(verdict, sock_map, BPF_SK_SKB_VERDICT);
diff --git a/tools/testing/selftests/bpf/progs/test_sockmap_listen.c b/tools/testing/selftests/bpf/progs/test_sockmap_listen.c
index 464d35bd57c7..b7250eb9c30c 100644
--- a/tools/testing/selftests/bpf/progs/test_sockmap_listen.c
+++ b/tools/testing/selftests/bpf/progs/test_sockmap_listen.c
@@ -14,6 +14,13 @@ struct {
__type(value, __u64);
} sock_map SEC(".maps");
+struct {
+ __uint(type, BPF_MAP_TYPE_SOCKMAP);
+ __uint(max_entries, 2);
+ __type(key, __u32);
+ __type(value, __u64);
+} nop_map SEC(".maps");
+
struct {
__uint(type, BPF_MAP_TYPE_SOCKHASH);
__uint(max_entries, 2);
--
2.33.0
next prev parent reply other threads:[~2023-11-22 19:24 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-22 19:24 [PATCH bpf v2 0/2] sockmap fix for KASAN_VMALLOC and af_unix John Fastabend
2023-11-22 19:24 ` [PATCH bpf v2 1/2] bpf: sockmap, af_unix stream sockets need to hold ref for pair sock John Fastabend
2023-11-23 17:55 ` Yonghong Song
2023-11-23 20:24 ` Cong Wang
2023-11-24 13:43 ` Jakub Sitnicki
2023-11-22 19:24 ` John Fastabend [this message]
2023-11-24 13:53 ` [PATCH bpf v2 0/2] sockmap fix for KASAN_VMALLOC and af_unix Jakub Sitnicki
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