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author | 2020-05-31 10:28:43 +0200 | |
---|---|---|
committer | 2020-06-01 15:21:03 -0700 | |
commit | 1f043f87bb595bbe6c7e6b291d115284840a6c33 (patch) | |
tree | 091e3779fd034a281e3d9bd275f229bfc8b9eb0a /tools/testing/selftests/bpf/prog_tests/flow_dissector_reattach.c | |
parent | bpftool: Support link show for netns-attached links (diff) | |
download | linux-1f043f87bb595bbe6c7e6b291d115284840a6c33.tar.gz linux-1f043f87bb595bbe6c7e6b291d115284840a6c33.tar.bz2 linux-1f043f87bb595bbe6c7e6b291d115284840a6c33.zip |
selftests/bpf: Add tests for attaching bpf_link to netns
Extend the existing test case for flow dissector attaching to cover:
- link creation,
- link updates,
- link info querying,
- mixing links with direct prog attachment.
Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200531082846.2117903-10-jakub@cloudflare.com
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/flow_dissector_reattach.c')
-rw-r--r-- | tools/testing/selftests/bpf/prog_tests/flow_dissector_reattach.c | 588 |
1 files changed, 551 insertions, 37 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/flow_dissector_reattach.c b/tools/testing/selftests/bpf/prog_tests/flow_dissector_reattach.c index 1f51ba66b98b..15cb554a66d8 100644 --- a/tools/testing/selftests/bpf/prog_tests/flow_dissector_reattach.c +++ b/tools/testing/selftests/bpf/prog_tests/flow_dissector_reattach.c @@ -11,6 +11,7 @@ #include <fcntl.h> #include <sched.h> #include <stdbool.h> +#include <sys/stat.h> #include <unistd.h> #include <linux/bpf.h> @@ -18,21 +19,30 @@ #include "test_progs.h" -static bool is_attached(int netns) +static int init_net = -1; + +static __u32 query_attached_prog_id(int netns) { - __u32 cnt; + __u32 prog_ids[1] = {}; + __u32 prog_cnt = ARRAY_SIZE(prog_ids); int err; - err = bpf_prog_query(netns, BPF_FLOW_DISSECTOR, 0, NULL, NULL, &cnt); + err = bpf_prog_query(netns, BPF_FLOW_DISSECTOR, 0, NULL, + prog_ids, &prog_cnt); if (CHECK_FAIL(err)) { perror("bpf_prog_query"); - return true; /* fail-safe */ + return 0; } - return cnt > 0; + return prog_cnt == 1 ? prog_ids[0] : 0; +} + +static bool prog_is_attached(int netns) +{ + return query_attached_prog_id(netns) > 0; } -static int load_prog(void) +static int load_prog(enum bpf_prog_type type) { struct bpf_insn prog[] = { BPF_MOV64_IMM(BPF_REG_0, BPF_OK), @@ -40,61 +50,566 @@ static int load_prog(void) }; int fd; - fd = bpf_load_program(BPF_PROG_TYPE_FLOW_DISSECTOR, prog, - ARRAY_SIZE(prog), "GPL", 0, NULL, 0); + fd = bpf_load_program(type, prog, ARRAY_SIZE(prog), "GPL", 0, NULL, 0); if (CHECK_FAIL(fd < 0)) perror("bpf_load_program"); return fd; } -static void do_flow_dissector_reattach(void) +static __u32 query_prog_id(int prog) { - int prog_fd[2] = { -1, -1 }; + struct bpf_prog_info info = {}; + __u32 info_len = sizeof(info); int err; - prog_fd[0] = load_prog(); - if (prog_fd[0] < 0) - return; + err = bpf_obj_get_info_by_fd(prog, &info, &info_len); + if (CHECK_FAIL(err || info_len != sizeof(info))) { + perror("bpf_obj_get_info_by_fd"); + return 0; + } - prog_fd[1] = load_prog(); - if (prog_fd[1] < 0) - goto out_close; + return info.id; +} + +static int unshare_net(int old_net) +{ + int err, new_net; - err = bpf_prog_attach(prog_fd[0], 0, BPF_FLOW_DISSECTOR, 0); + err = unshare(CLONE_NEWNET); if (CHECK_FAIL(err)) { - perror("bpf_prog_attach-0"); - goto out_close; + perror("unshare(CLONE_NEWNET)"); + return -1; + } + new_net = open("/proc/self/ns/net", O_RDONLY); + if (CHECK_FAIL(new_net < 0)) { + perror("open(/proc/self/ns/net)"); + setns(old_net, CLONE_NEWNET); + return -1; } + return new_net; +} + +static void test_prog_attach_prog_attach(int netns, int prog1, int prog2) +{ + int err; + + err = bpf_prog_attach(prog1, 0, BPF_FLOW_DISSECTOR, 0); + if (CHECK_FAIL(err)) { + perror("bpf_prog_attach(prog1)"); + return; + } + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); /* Expect success when attaching a different program */ - err = bpf_prog_attach(prog_fd[1], 0, BPF_FLOW_DISSECTOR, 0); + err = bpf_prog_attach(prog2, 0, BPF_FLOW_DISSECTOR, 0); if (CHECK_FAIL(err)) { - perror("bpf_prog_attach-1"); + perror("bpf_prog_attach(prog2) #1"); goto out_detach; } + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog2)); /* Expect failure when attaching the same program twice */ - err = bpf_prog_attach(prog_fd[1], 0, BPF_FLOW_DISSECTOR, 0); + err = bpf_prog_attach(prog2, 0, BPF_FLOW_DISSECTOR, 0); if (CHECK_FAIL(!err || errno != EINVAL)) - perror("bpf_prog_attach-2"); + perror("bpf_prog_attach(prog2) #2"); + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog2)); out_detach: err = bpf_prog_detach(0, BPF_FLOW_DISSECTOR); if (CHECK_FAIL(err)) perror("bpf_prog_detach"); + CHECK_FAIL(prog_is_attached(netns)); +} + +static void test_link_create_link_create(int netns, int prog1, int prog2) +{ + DECLARE_LIBBPF_OPTS(bpf_link_create_opts, opts); + int link1, link2; + + link1 = bpf_link_create(prog1, netns, BPF_FLOW_DISSECTOR, &opts); + if (CHECK_FAIL(link < 0)) { + perror("bpf_link_create(prog1)"); + return; + } + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + + /* Expect failure creating link when another link exists */ + errno = 0; + link2 = bpf_link_create(prog2, netns, BPF_FLOW_DISSECTOR, &opts); + if (CHECK_FAIL(link2 != -1 || errno != E2BIG)) + perror("bpf_prog_attach(prog2) expected E2BIG"); + if (link2 != -1) + close(link2); + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + + close(link1); + CHECK_FAIL(prog_is_attached(netns)); +} + +static void test_prog_attach_link_create(int netns, int prog1, int prog2) +{ + DECLARE_LIBBPF_OPTS(bpf_link_create_opts, opts); + int err, link; + + err = bpf_prog_attach(prog1, -1, BPF_FLOW_DISSECTOR, 0); + if (CHECK_FAIL(err)) { + perror("bpf_prog_attach(prog1)"); + return; + } + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + + /* Expect failure creating link when prog attached */ + errno = 0; + link = bpf_link_create(prog2, netns, BPF_FLOW_DISSECTOR, &opts); + if (CHECK_FAIL(link != -1 || errno != EEXIST)) + perror("bpf_link_create(prog2) expected EEXIST"); + if (link != -1) + close(link); + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + + err = bpf_prog_detach(-1, BPF_FLOW_DISSECTOR); + if (CHECK_FAIL(err)) + perror("bpf_prog_detach"); + CHECK_FAIL(prog_is_attached(netns)); +} + +static void test_link_create_prog_attach(int netns, int prog1, int prog2) +{ + DECLARE_LIBBPF_OPTS(bpf_link_create_opts, opts); + int err, link; + + link = bpf_link_create(prog1, netns, BPF_FLOW_DISSECTOR, &opts); + if (CHECK_FAIL(link < 0)) { + perror("bpf_link_create(prog1)"); + return; + } + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + + /* Expect failure attaching prog when link exists */ + errno = 0; + err = bpf_prog_attach(prog2, -1, BPF_FLOW_DISSECTOR, 0); + if (CHECK_FAIL(!err || errno != EEXIST)) + perror("bpf_prog_attach(prog2) expected EEXIST"); + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + + close(link); + CHECK_FAIL(prog_is_attached(netns)); +} + +static void test_link_create_prog_detach(int netns, int prog1, int prog2) +{ + DECLARE_LIBBPF_OPTS(bpf_link_create_opts, opts); + int err, link; + + link = bpf_link_create(prog1, netns, BPF_FLOW_DISSECTOR, &opts); + if (CHECK_FAIL(link < 0)) { + perror("bpf_link_create(prog1)"); + return; + } + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + + /* Expect failure detaching prog when link exists */ + errno = 0; + err = bpf_prog_detach(-1, BPF_FLOW_DISSECTOR); + if (CHECK_FAIL(!err || errno != EINVAL)) + perror("bpf_prog_detach expected EINVAL"); + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + + close(link); + CHECK_FAIL(prog_is_attached(netns)); +} + +static void test_prog_attach_detach_query(int netns, int prog1, int prog2) +{ + int err; + + err = bpf_prog_attach(prog1, 0, BPF_FLOW_DISSECTOR, 0); + if (CHECK_FAIL(err)) { + perror("bpf_prog_attach(prog1)"); + return; + } + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + + err = bpf_prog_detach(0, BPF_FLOW_DISSECTOR); + if (CHECK_FAIL(err)) { + perror("bpf_prog_detach"); + return; + } + + /* Expect no prog attached after successful detach */ + CHECK_FAIL(prog_is_attached(netns)); +} + +static void test_link_create_close_query(int netns, int prog1, int prog2) +{ + DECLARE_LIBBPF_OPTS(bpf_link_create_opts, opts); + int link; + + link = bpf_link_create(prog1, netns, BPF_FLOW_DISSECTOR, &opts); + if (CHECK_FAIL(link < 0)) { + perror("bpf_link_create(prog1)"); + return; + } + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + + close(link); + /* Expect no prog attached after closing last link FD */ + CHECK_FAIL(prog_is_attached(netns)); +} + +static void test_link_update_no_old_prog(int netns, int prog1, int prog2) +{ + DECLARE_LIBBPF_OPTS(bpf_link_create_opts, create_opts); + DECLARE_LIBBPF_OPTS(bpf_link_update_opts, update_opts); + int err, link; + + link = bpf_link_create(prog1, netns, BPF_FLOW_DISSECTOR, &create_opts); + if (CHECK_FAIL(link < 0)) { + perror("bpf_link_create(prog1)"); + return; + } + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + + /* Expect success replacing the prog when old prog not specified */ + update_opts.flags = 0; + update_opts.old_prog_fd = 0; + err = bpf_link_update(link, prog2, &update_opts); + if (CHECK_FAIL(err)) + perror("bpf_link_update"); + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog2)); + + close(link); + CHECK_FAIL(prog_is_attached(netns)); +} + +static void test_link_update_replace_old_prog(int netns, int prog1, int prog2) +{ + DECLARE_LIBBPF_OPTS(bpf_link_create_opts, create_opts); + DECLARE_LIBBPF_OPTS(bpf_link_update_opts, update_opts); + int err, link; + link = bpf_link_create(prog1, netns, BPF_FLOW_DISSECTOR, &create_opts); + if (CHECK_FAIL(link < 0)) { + perror("bpf_link_create(prog1)"); + return; + } + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + + /* Expect success F_REPLACE and old prog specified to succeed */ + update_opts.flags = BPF_F_REPLACE; + update_opts.old_prog_fd = prog1; + err = bpf_link_update(link, prog2, &update_opts); + if (CHECK_FAIL(err)) + perror("bpf_link_update"); + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog2)); + + close(link); + CHECK_FAIL(prog_is_attached(netns)); +} + +static void test_link_update_invalid_opts(int netns, int prog1, int prog2) +{ + DECLARE_LIBBPF_OPTS(bpf_link_create_opts, create_opts); + DECLARE_LIBBPF_OPTS(bpf_link_update_opts, update_opts); + int err, link; + + link = bpf_link_create(prog1, netns, BPF_FLOW_DISSECTOR, &create_opts); + if (CHECK_FAIL(link < 0)) { + perror("bpf_link_create(prog1)"); + return; + } + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + + /* Expect update to fail w/ old prog FD but w/o F_REPLACE*/ + errno = 0; + update_opts.flags = 0; + update_opts.old_prog_fd = prog1; + err = bpf_link_update(link, prog2, &update_opts); + if (CHECK_FAIL(!err || errno != EINVAL)) { + perror("bpf_link_update expected EINVAL"); + goto out_close; + } + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + + /* Expect update to fail on old prog FD mismatch */ + errno = 0; + update_opts.flags = BPF_F_REPLACE; + update_opts.old_prog_fd = prog2; + err = bpf_link_update(link, prog2, &update_opts); + if (CHECK_FAIL(!err || errno != EPERM)) { + perror("bpf_link_update expected EPERM"); + goto out_close; + } + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + + /* Expect update to fail for invalid old prog FD */ + errno = 0; + update_opts.flags = BPF_F_REPLACE; + update_opts.old_prog_fd = -1; + err = bpf_link_update(link, prog2, &update_opts); + if (CHECK_FAIL(!err || errno != EBADF)) { + perror("bpf_link_update expected EBADF"); + goto out_close; + } + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + + /* Expect update to fail with invalid flags */ + errno = 0; + update_opts.flags = BPF_F_ALLOW_MULTI; + update_opts.old_prog_fd = 0; + err = bpf_link_update(link, prog2, &update_opts); + if (CHECK_FAIL(!err || errno != EINVAL)) + perror("bpf_link_update expected EINVAL"); + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + +out_close: + close(link); + CHECK_FAIL(prog_is_attached(netns)); +} + +static void test_link_update_invalid_prog(int netns, int prog1, int prog2) +{ + DECLARE_LIBBPF_OPTS(bpf_link_create_opts, create_opts); + DECLARE_LIBBPF_OPTS(bpf_link_update_opts, update_opts); + int err, link, prog3; + + link = bpf_link_create(prog1, netns, BPF_FLOW_DISSECTOR, &create_opts); + if (CHECK_FAIL(link < 0)) { + perror("bpf_link_create(prog1)"); + return; + } + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + + /* Expect failure when new prog FD is not valid */ + errno = 0; + update_opts.flags = 0; + update_opts.old_prog_fd = 0; + err = bpf_link_update(link, -1, &update_opts); + if (CHECK_FAIL(!err || errno != EBADF)) { + perror("bpf_link_update expected EINVAL"); + goto out_close_link; + } + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + + prog3 = load_prog(BPF_PROG_TYPE_SOCKET_FILTER); + if (prog3 < 0) + goto out_close_link; + + /* Expect failure when new prog FD type doesn't match */ + errno = 0; + update_opts.flags = 0; + update_opts.old_prog_fd = 0; + err = bpf_link_update(link, prog3, &update_opts); + if (CHECK_FAIL(!err || errno != EINVAL)) + perror("bpf_link_update expected EINVAL"); + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + + close(prog3); +out_close_link: + close(link); + CHECK_FAIL(prog_is_attached(netns)); +} + +static void test_link_update_netns_gone(int netns, int prog1, int prog2) +{ + DECLARE_LIBBPF_OPTS(bpf_link_create_opts, create_opts); + DECLARE_LIBBPF_OPTS(bpf_link_update_opts, update_opts); + int err, link, old_net; + + old_net = netns; + netns = unshare_net(old_net); + if (netns < 0) + return; + + link = bpf_link_create(prog1, netns, BPF_FLOW_DISSECTOR, &create_opts); + if (CHECK_FAIL(link < 0)) { + perror("bpf_link_create(prog1)"); + return; + } + CHECK_FAIL(query_attached_prog_id(netns) != query_prog_id(prog1)); + + close(netns); + err = setns(old_net, CLONE_NEWNET); + if (CHECK_FAIL(err)) { + perror("setns(CLONE_NEWNET)"); + close(link); + return; + } + + /* Expect failure when netns destroyed */ + errno = 0; + update_opts.flags = 0; + update_opts.old_prog_fd = 0; + err = bpf_link_update(link, prog2, &update_opts); + if (CHECK_FAIL(!err || errno != ENOLINK)) + perror("bpf_link_update"); + + close(link); +} + +static void test_link_get_info(int netns, int prog1, int prog2) +{ + DECLARE_LIBBPF_OPTS(bpf_link_create_opts, create_opts); + DECLARE_LIBBPF_OPTS(bpf_link_update_opts, update_opts); + struct bpf_link_info info = {}; + struct stat netns_stat = {}; + __u32 info_len, link_id; + int err, link, old_net; + + old_net = netns; + netns = unshare_net(old_net); + if (netns < 0) + return; + + err = fstat(netns, &netns_stat); + if (CHECK_FAIL(err)) { + perror("stat(netns)"); + goto out_resetns; + } + + link = bpf_link_create(prog1, netns, BPF_FLOW_DISSECTOR, &create_opts); + if (CHECK_FAIL(link < 0)) { + perror("bpf_link_create(prog1)"); + goto out_resetns; + } + + info_len = sizeof(info); + err = bpf_obj_get_info_by_fd(link, &info, &info_len); + if (CHECK_FAIL(err)) { + perror("bpf_obj_get_info"); + goto out_unlink; + } + CHECK_FAIL(info_len != sizeof(info)); + + /* Expect link info to be sane and match prog and netns details */ + CHECK_FAIL(info.type != BPF_LINK_TYPE_NETNS); + CHECK_FAIL(info.id == 0); + CHECK_FAIL(info.prog_id != query_prog_id(prog1)); + CHECK_FAIL(info.netns.netns_ino != netns_stat.st_ino); + CHECK_FAIL(info.netns.attach_type != BPF_FLOW_DISSECTOR); + + update_opts.flags = 0; + update_opts.old_prog_fd = 0; + err = bpf_link_update(link, prog2, &update_opts); + if (CHECK_FAIL(err)) { + perror("bpf_link_update(prog2)"); + goto out_unlink; + } + + link_id = info.id; + info_len = sizeof(info); + err = bpf_obj_get_info_by_fd(link, &info, &info_len); + if (CHECK_FAIL(err)) { + perror("bpf_obj_get_info"); + goto out_unlink; + } + CHECK_FAIL(info_len != sizeof(info)); + + /* Expect no info change after update except in prog id */ + CHECK_FAIL(info.type != BPF_LINK_TYPE_NETNS); + CHECK_FAIL(info.id != link_id); + CHECK_FAIL(info.prog_id != query_prog_id(prog2)); + CHECK_FAIL(info.netns.netns_ino != netns_stat.st_ino); + CHECK_FAIL(info.netns.attach_type != BPF_FLOW_DISSECTOR); + + /* Leave netns link is attached to and close last FD to it */ + err = setns(old_net, CLONE_NEWNET); + if (CHECK_FAIL(err)) { + perror("setns(NEWNET)"); + goto out_unlink; + } + close(netns); + old_net = -1; + netns = -1; + + info_len = sizeof(info); + err = bpf_obj_get_info_by_fd(link, &info, &info_len); + if (CHECK_FAIL(err)) { + perror("bpf_obj_get_info"); + goto out_unlink; + } + CHECK_FAIL(info_len != sizeof(info)); + + /* Expect netns_ino to change to 0 */ + CHECK_FAIL(info.type != BPF_LINK_TYPE_NETNS); + CHECK_FAIL(info.id != link_id); + CHECK_FAIL(info.prog_id != query_prog_id(prog2)); + CHECK_FAIL(info.netns.netns_ino != 0); + CHECK_FAIL(info.netns.attach_type != BPF_FLOW_DISSECTOR); + +out_unlink: + close(link); +out_resetns: + if (old_net != -1) + setns(old_net, CLONE_NEWNET); + if (netns != -1) + close(netns); +} + +static void run_tests(int netns) +{ + struct test { + const char *test_name; + void (*test_func)(int netns, int prog1, int prog2); + } tests[] = { + { "prog attach, prog attach", + test_prog_attach_prog_attach }, + { "link create, link create", + test_link_create_link_create }, + { "prog attach, link create", + test_prog_attach_link_create }, + { "link create, prog attach", + test_link_create_prog_attach }, + { "link create, prog detach", + test_link_create_prog_detach }, + { "prog attach, detach, query", + test_prog_attach_detach_query }, + { "link create, close, query", + test_link_create_close_query }, + { "link update no old prog", + test_link_update_no_old_prog }, + { "link update with replace old prog", + test_link_update_replace_old_prog }, + { "link update invalid opts", + test_link_update_invalid_opts }, + { "link update invalid prog", + test_link_update_invalid_prog }, + { "link update netns gone", + test_link_update_netns_gone }, + { "link get info", + test_link_get_info }, + }; + int i, progs[2] = { -1, -1 }; + char test_name[80]; + + for (i = 0; i < ARRAY_SIZE(progs); i++) { + progs[i] = load_prog(BPF_PROG_TYPE_FLOW_DISSECTOR); + if (progs[i] < 0) + goto out_close; + } + + for (i = 0; i < ARRAY_SIZE(tests); i++) { + snprintf(test_name, sizeof(test_name), + "flow dissector %s%s", + tests[i].test_name, + netns == init_net ? " (init_net)" : ""); + if (test__start_subtest(test_name)) + tests[i].test_func(netns, progs[0], progs[1]); + } out_close: - close(prog_fd[1]); - close(prog_fd[0]); + for (i = 0; i < ARRAY_SIZE(progs); i++) { + if (progs[i] != -1) + CHECK_FAIL(close(progs[i])); + } } void test_flow_dissector_reattach(void) { - int init_net, self_net, err; + int err, new_net, saved_net; - self_net = open("/proc/self/ns/net", O_RDONLY); - if (CHECK_FAIL(self_net < 0)) { + saved_net = open("/proc/self/ns/net", O_RDONLY); + if (CHECK_FAIL(saved_net < 0)) { perror("open(/proc/self/ns/net"); return; } @@ -111,30 +626,29 @@ void test_flow_dissector_reattach(void) goto out_close; } - if (is_attached(init_net)) { + if (prog_is_attached(init_net)) { test__skip(); printf("Can't test with flow dissector attached to init_net\n"); goto out_setns; } /* First run tests in root network namespace */ - do_flow_dissector_reattach(); + run_tests(init_net); /* Then repeat tests in a non-root namespace */ - err = unshare(CLONE_NEWNET); - if (CHECK_FAIL(err)) { - perror("unshare(CLONE_NEWNET)"); + new_net = unshare_net(init_net); + if (new_net < 0) goto out_setns; - } - do_flow_dissector_reattach(); + run_tests(new_net); + close(new_net); out_setns: /* Move back to netns we started in. */ - err = setns(self_net, CLONE_NEWNET); + err = setns(saved_net, CLONE_NEWNET); if (CHECK_FAIL(err)) perror("setns(/proc/self/ns/net)"); out_close: close(init_net); - close(self_net); + close(saved_net); } |