Commit graph

7 commits

Author SHA1 Message Date
Martin KaFai Lau
8085e1dc1f bpf: selftests: Add fastopen_connect to network_helpers
This patch adds a fastopen_connect() helper which will
be used in a later test.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200820190111.2886196-1-kafai@fb.com
2020-08-24 14:35:00 -07:00
Jakub Sitnicki
0ab5539f85 selftests/bpf: Tests for BPF_SK_LOOKUP attach point
Add tests to test_progs that exercise:

 - attaching/detaching/querying programs to BPF_SK_LOOKUP hook,
 - redirecting socket lookup to a socket selected by BPF program,
 - failing a socket lookup on BPF program's request,
 - error scenarios for selecting a socket from BPF program,
 - accessing BPF program context,
 - attaching and running multiple BPF programs.

Run log:

  bash-5.0# ./test_progs -n 70
  #70/1 query lookup prog:OK
  #70/2 TCP IPv4 redir port:OK
  #70/3 TCP IPv4 redir addr:OK
  #70/4 TCP IPv4 redir with reuseport:OK
  #70/5 TCP IPv4 redir skip reuseport:OK
  #70/6 TCP IPv6 redir port:OK
  #70/7 TCP IPv6 redir addr:OK
  #70/8 TCP IPv4->IPv6 redir port:OK
  #70/9 TCP IPv6 redir with reuseport:OK
  #70/10 TCP IPv6 redir skip reuseport:OK
  #70/11 UDP IPv4 redir port:OK
  #70/12 UDP IPv4 redir addr:OK
  #70/13 UDP IPv4 redir with reuseport:OK
  #70/14 UDP IPv4 redir skip reuseport:OK
  #70/15 UDP IPv6 redir port:OK
  #70/16 UDP IPv6 redir addr:OK
  #70/17 UDP IPv4->IPv6 redir port:OK
  #70/18 UDP IPv6 redir and reuseport:OK
  #70/19 UDP IPv6 redir skip reuseport:OK
  #70/20 TCP IPv4 drop on lookup:OK
  #70/21 TCP IPv6 drop on lookup:OK
  #70/22 UDP IPv4 drop on lookup:OK
  #70/23 UDP IPv6 drop on lookup:OK
  #70/24 TCP IPv4 drop on reuseport:OK
  #70/25 TCP IPv6 drop on reuseport:OK
  #70/26 UDP IPv4 drop on reuseport:OK
  #70/27 TCP IPv6 drop on reuseport:OK
  #70/28 sk_assign returns EEXIST:OK
  #70/29 sk_assign honors F_REPLACE:OK
  #70/30 sk_assign accepts NULL socket:OK
  #70/31 access ctx->sk:OK
  #70/32 narrow access to ctx v4:OK
  #70/33 narrow access to ctx v6:OK
  #70/34 sk_assign rejects TCP established:OK
  #70/35 sk_assign rejects UDP connected:OK
  #70/36 multi prog - pass, pass:OK
  #70/37 multi prog - drop, drop:OK
  #70/38 multi prog - pass, drop:OK
  #70/39 multi prog - drop, pass:OK
  #70/40 multi prog - pass, redir:OK
  #70/41 multi prog - redir, pass:OK
  #70/42 multi prog - drop, redir:OK
  #70/43 multi prog - redir, drop:OK
  #70/44 multi prog - redir, redir:OK
  #70 sk_lookup:OK
  Summary: 1/44 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200717103536.397595-16-jakub@cloudflare.com
2020-07-17 20:18:17 -07:00
Martin KaFai Lau
99126abec5 bpf: selftests: A few improvements to network_helpers.c
This patch makes a few changes to the network_helpers.c

1) Enforce SO_RCVTIMEO and SO_SNDTIMEO
   This patch enforces timeout to the network fds through setsockopt
   SO_RCVTIMEO and SO_SNDTIMEO.

   It will remove the need for SOCK_NONBLOCK that requires a more demanding
   timeout logic with epoll/select, e.g. epoll_create, epoll_ctrl, and
   then epoll_wait for timeout.

   That removes the need for connect_wait() from the
   cgroup_skb_sk_lookup.c. The needed change is made in
   cgroup_skb_sk_lookup.c.

2) start_server():
   Add optional addr_str and port to start_server().
   That removes the need of the start_server_with_port().  The caller
   can pass addr_str==NULL and/or port==0.

   I have a future tcp-hdr-opt test that will pass a non-NULL addr_str
   and it is in general useful for other future tests.

   "int timeout_ms" is also added to control the timeout
   on the "accept(listen_fd)".

3) connect_to_fd(): Fully use the server_fd.
   The server sock address has already been obtained from
   getsockname(server_fd).  The sockaddr includes the family,
   so the "int family" arg is redundant.

   Since the server address is obtained from server_fd,  there
   is little reason not to get the server's socket type from the
   server_fd also.  getsockopt(server_fd) can be used to do that,
   so "int type" arg is also removed.

   "int timeout_ms" is added.

4) connect_fd_to_fd():
   "int timeout_ms" is added.
   Some code is also refactored to connect_fd_to_addr() which is
   shared with connect_to_fd().

5) Preserve errno:
   Some callers need to check errno, e.g. cgroup_skb_sk_lookup.c.
   Make changes to do it more consistently in save_errno_close()
   and log_err().

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200702004852.2103003-1-kafai@fb.com
2020-07-02 16:09:01 +02:00
Daniel Borkmann
566fc3f5d1 bpf, testing: Add get{peer, sock}name selftests to test_progs
Extend the existing connect_force_port test to assert get{peer,sock}name programs
as well. The workflow for e.g. IPv4 is as follows: i) server binds to concrete
port, ii) client calls getsockname() on server fd which exposes 1.2.3.4:60000 to
client, iii) client connects to service address 1.2.3.4:60000 binds to concrete
local address (127.0.0.1:22222) and remaps service address to a concrete backend
address (127.0.0.1:60123), iv) client then calls getsockname() on its own fd to
verify local address (127.0.0.1:22222) and getpeername() on its own fd which then
publishes service address (1.2.3.4:60000) instead of actual backend. Same workflow
is done for IPv6 just with different address/port tuples.

  # ./test_progs -t connect_force_port
  #14 connect_force_port:OK
  Summary: 1/0 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Andrey Ignatov <rdna@fb.com>
Link: https://lore.kernel.org/bpf/3343da6ad08df81af715a95d61a84fb4a960f2bf.1589841594.git.daniel@iogearbox.net
2020-05-19 11:32:04 -07:00
Andrey Ignatov
383724e17a selftests/bpf: Add connect_fd_to_fd, connect_wait net helpers
Add two new network helpers.

connect_fd_to_fd connects an already created client socket fd to address
of server fd. Sometimes it's useful to separate client socket creation
and connecting this socket to a server, e.g. if client socket has to be
created in a cgroup different from that of server cgroup.

Additionally connect_to_fd is now implemented using connect_fd_to_fd,
both helpers don't treat EINPROGRESS as an error and let caller decide
how to proceed with it.

connect_wait is a helper to work with non-blocking client sockets so
that if connect_to_fd or connect_fd_to_fd returned -1 with errno ==
EINPROGRESS, caller can wait for connect to finish or for connection
timeout. The helper returns -1 on error, 0 on timeout (1sec,
hard-coded), and positive number on success.

Signed-off-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/1403fab72300f379ca97ead4820ae43eac4414ef.1589486450.git.rdna@fb.com
2020-05-14 18:41:08 -07:00
Stanislav Fomichev
488a23b89d selftests/bpf: Move existing common networking parts into network_helpers
1. Move pkt_v4 and pkt_v6 into network_helpers and adjust the users.
2. Copy-paste spin_lock_thread into two tests that use it.

Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Andrey Ignatov <rdna@fb.com>
Link: https://lore.kernel.org/bpf/20200508174611.228805-3-sdf@google.com
2020-05-09 00:48:20 +02:00
Stanislav Fomichev
33181bb8e8 selftests/bpf: Generalize helpers to control background listener
Move the following routines that let us start a background listener
thread and connect to a server by fd to the test_prog:
* start_server - socket+bind+listen
* connect_to_fd - connect to the server identified by fd

These will be used in the next commit.

Also, extend these helpers to support AF_INET6 and accept the family
as an argument.

v5:
* drop pthread.h (Martin KaFai Lau)
* add SO_SNDTIMEO (Martin KaFai Lau)

v4:
* export extra helper to start server without a thread (Martin KaFai Lau)
* tcp_rtt is no longer starting background thread (Martin KaFai Lau)

v2:
* put helpers into network_helpers.c (Andrii Nakryiko)

Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrey Ignatov <rdna@fb.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20200508174611.228805-2-sdf@google.com
2020-05-09 00:48:20 +02:00