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2021-08-18selftests: vrf: Add test for SNAT over VRFLahav Schlesinger
Commit 09e856d54bda ("vrf: Reset skb conntrack connection on VRF rcv") fixes the "reverse-DNAT" of an SNAT-ed packet over a VRF. This patch adds a test for this scenario. Signed-off-by: Lahav Schlesinger <lschlesinger@drivenets.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-18selftests: nci: Add the NCI testcase reading T4T TagBongsu Jeon
Add the NCI testcase reading T4T Tag that has NFC TEST in plain text. the virtual device application acts as T4T Tag in this testcase. Signed-off-by: Bongsu Jeon <bongsu.jeon@samsung.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-18selftests: nci: Extract the start/stop discovery functionBongsu Jeon
To reuse the start/stop discovery code in other testcase, extract the code. Signed-off-by: Bongsu Jeon <bongsu.jeon@samsung.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-18selftests: nci: Add the flags parameter for the send_cmd_mt_nlaBongsu Jeon
To reuse the send_cmd_mt_nla for NLM_F_REQUEST and NLM_F_DUMP flag, add the flags parameter to the function. Signed-off-by: Bongsu Jeon <bongsu.jeon@samsung.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-18selftests: nci: Fix the wrong conditionBongsu Jeon
memcpy should be executed only in case nla_len's value is greater than 0. Signed-off-by: Bongsu Jeon <bongsu.jeon@samsung.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-18selftests: nci: Fix the code for next nlattr offsetBongsu Jeon
nlattr could have a padding for 4 bytes alignment. So next nla's offset should be calculated with a padding. Signed-off-by: Bongsu Jeon <bongsu.jeon@samsung.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-18selftests: nci: Fix the typoBongsu Jeon
Fix typo: rep_len -> resp_len Signed-off-by: Bongsu Jeon <bongsu.jeon@samsung.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-18selftests: nci: Remove the polling code to read a NCI frameBongsu Jeon
Because the virtual NCI device uses Wait Queue, the virtual device application doesn't need to poll the NCI frame. Signed-off-by: Bongsu Jeon <bongsu.jeon@samsung.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-18selftests: mptcp: delete uncontinuous removing idsGeliang Tang
The removing addresses testcases can only deal with the continuous ids. This patch added the uncontinuous removing ids support. Signed-off-by: Geliang Tang <geliangtang@xiaomi.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-18selftests: mptcp: add fullmesh testcasesGeliang Tang
This patch added the testcases for the fullmesh address flag of the path manager. Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Geliang Tang <geliangtang@xiaomi.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-18selftests: mptcp: set and print the fullmesh flagGeliang Tang
This patch dealt with the MPTCP_PM_ADDR_FLAG_FULLMESH flag in add_addr() and print_addr(), to set and print out the fullmesh flag. Signed-off-by: Geliang Tang <geliangtang@xiaomi.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-17selftests/bpf: Fix flaky send_signal testYonghong Song
libbpf CI has reported send_signal test is flaky although I am not able to reproduce it in my local environment. But I am able to reproduce with on-demand libbpf CI ([1]). Through code analysis, the following is possible reason. The failed subtest runs bpf program in softirq environment. Since bpf_send_signal() only sends to a fork of "test_progs" process. If the underlying current task is not "test_progs", bpf_send_signal() will not be triggered and the subtest will fail. To reduce the chances where the underlying process is not the intended one, this patch boosted scheduling priority to -20 (highest allowed by setpriority() call). And I did 10 runs with on-demand libbpf CI with this patch and I didn't observe any failures. [1] https://github.com/libbpf/libbpf/actions/workflows/ondemand.yml Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210817190923.3186725-1-yhs@fb.com
2021-08-17selftests/bpf: Replace CHECK with ASSERT_* macros in send_signal.cYonghong Song
Replace CHECK in send_signal.c with ASSERT_* macros as ASSERT_* macros are generally preferred. There is no funcitonality change. Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210817190918.3186400-1-yhs@fb.com
2021-08-17selftests/bpf: Support glob matching for test selector.Yucong Sun
This patch adds '-a' and '-d' arguments supporting both exact string match as well as using '*' wildcard in test/subtests selection. '-a' and '-t' can co-exists, same as '-d' and '-b', in which case they just add to the list of allowed or denied test selectors. Caveat: Same as the current substring matching mechanism, test and subtest selector applies independently, 'a*/b*' will execute all tests matching "a*", and with subtest name matching "b*", but tests matching "a*" that has no subtests will also be executed. Signed-off-by: Yucong Sun <fallentree@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210817044732.3263066-5-fallentree@fb.com
2021-08-17selftests/bpf: Also print test name in subtest status messageYucong Sun
This patch add test name in subtest status message line, making it possible to grep ':OK' in the output to generate a list of passed test+subtest names, which can be processed to generate argument list to be used with "-a", "-d" exact string matching. Example: #1/1 align/mov:OK .. #1/12 align/pointer variable subtraction:OK #1 align:OK Signed-off-by: Yucong Sun <fallentree@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210817044732.3263066-4-fallentree@fb.com
2021-08-17selftests/bpf: Correctly display subtest skip statusYucong Sun
In skip_account(), test->skip_cnt is set to 0 at the end, this makes next print statement never display SKIP status for the subtest. This patch moves the accounting logic after the print statement, fixing the issue. This patch also added SKIP status display for normal tests. Signed-off-by: Yucong Sun <fallentree@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210817044732.3263066-3-fallentree@fb.com
2021-08-17selftests/bpf: Skip loading bpf_testmod when using -l to list tests.Yucong Sun
When using "-l", test_progs often is executed as non-root user, load_bpf_testmod() will fail and output errors. This patch skips loading bpf testmod when "-l" is specified, making output cleaner. Signed-off-by: Yucong Sun <fallentree@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210817044732.3263066-2-fallentree@fb.com
2021-08-17selftests/bpf: Add exponential backoff to map_delete_retriable in test_mapsYucong Sun
Using a fixed delay of 1 microsecond has proven flaky in slow CPU environment, e.g. Github Actions CI system. This patch adds exponential backoff with a cap of 50ms to reduce the flakiness of the test. Initial delay is chosen at random in the range [0ms, 5ms). Signed-off-by: Yucong Sun <fallentree@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210817045713.3307985-1-fallentree@fb.com
2021-08-17selftests: net: improved IOAM testsJustin Iurman
As previously discussed with David Ahern, here is a refactored and improved version of the IOAM self-test. It is now more complete and more robust. Now, all tests are divided into three categories: OUTPUT (evaluates the IOAM processing by the sender), INPUT (evaluates the IOAM processing by the receiver) and GLOBAL (evaluates wider use cases that do not fall into the other two categories). Both OUTPUT and INPUT tests only use a two-node topology (alpha and beta), while GLOBAL tests use the entire three-node topology (alpha, beta, gamma). Each test is documented inside its own handler in the (bash) script. Signed-off-by: Justin Iurman <justin.iurman@uliege.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-16selftests/bpf: Add exponential backoff to map_update_retriable in test_mapsYucong Sun
Using a fixed delay of 1 microsecond has proven flaky in slow CPU environment, e.g. Github Actions CI system. This patch adds exponential backoff with a cap of 50ms to reduce the flakiness of the test. Initial delay is chosen at random in the range [0ms, 5ms). Signed-off-by: Yucong Sun <fallentree@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20210816175250.296110-1-fallentree@fb.com
2021-08-16selftest/bpf: Add new tests in sockmap for unix stream to tcp.Jiang Wang
Add two new test cases in sockmap tests, where unix stream is redirected to tcp and vice versa. Signed-off-by: Jiang Wang <jiang.wang@bytedance.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Reviewed-by: Cong Wang <cong.wang@bytedance.com> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Jakub Sitnicki <jakub@cloudflare.com> Link: https://lore.kernel.org/bpf/20210816190327.2739291-6-jiang.wang@bytedance.com
2021-08-16selftest/bpf: Change udp to inet in some function namesJiang Wang
This is to prepare for adding new unix stream tests. Mostly renames, also pass the socket types as an argument. Signed-off-by: Jiang Wang <jiang.wang@bytedance.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Reviewed-by: Cong Wang <cong.wang@bytedance.com> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Jakub Sitnicki <jakub@cloudflare.com> Link: https://lore.kernel.org/bpf/20210816190327.2739291-5-jiang.wang@bytedance.com
2021-08-16selftest/bpf: Add tests for sockmap with unix stream type.Jiang Wang
Add two tests for unix stream to unix stream redirection in sockmap tests. Signed-off-by: Jiang Wang <jiang.wang@bytedance.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Reviewed-by: Cong Wang <cong.wang@bytedance.com> Acked-by: Jakub Sitnicki <jakub@cloudflare.com> Acked-by: John Fastabend <john.fastabend@gmail.com> Link: https://lore.kernel.org/bpf/20210816190327.2739291-4-jiang.wang@bytedance.com
2021-08-16selftests/bpf: Test btf__load_vmlinux_btf/btf__load_module_btf APIsHengqi Chen
Add test for btf__load_vmlinux_btf/btf__load_module_btf APIs. The test loads bpf_testmod module BTF and check existence of a symbol which is known to exist. Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210815081035.205879-1-hengqi.chen@gmail.com
2021-08-17selftests/bpf: Add ref_ctr_offset selftestsAndrii Nakryiko
Extend attach_probe selftests to specify ref_ctr_offset for uprobe/uretprobe and validate that its value is incremented from zero. Turns out that once uprobe is attached with ref_ctr_offset, uretprobe for the same location/function *has* to use ref_ctr_offset as well, otherwise perf_event_open() fails with -EINVAL. So this test uses ref_ctr_offset for both uprobe and uretprobe, even though for the purpose of test uprobe would be enough. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210815070609.987780-17-andrii@kernel.org
2021-08-17libbpf: Add uprobe ref counter offset support for USDT semaphoresAndrii Nakryiko
When attaching to uprobes through perf subsystem, it's possible to specify offset of a so-called USDT semaphore, which is just a reference counted u16, used by kernel to keep track of how many tracers are attached to a given location. Support for this feature was added in [0], so just wire this through uprobe_opts. This is important to enable implementing USDT attachment and tracing through libbpf's bpf_program__attach_uprobe_opts() API. [0] a6ca88b241d5 ("trace_uprobe: support reference counter in fd-based uprobe") Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210815070609.987780-16-andrii@kernel.org
2021-08-17selftests/bpf: Add bpf_cookie selftests for high-level APIsAndrii Nakryiko
Add selftest with few subtests testing proper bpf_cookie usage. Kprobe and uprobe subtests are pretty straightforward and just validate that the same BPF program attached with different bpf_cookie will be triggered with those different bpf_cookie values. Tracepoint subtest is a bit more interesting, as it is the only perf_event-based BPF hook that shares bpf_prog_array between multiple perf_events internally. This means that the same BPF program can't be attached to the same tracepoint multiple times. So we have 3 identical copies. This arrangement allows to test bpf_prog_array_copy()'s handling of bpf_prog_array list manipulation logic when programs are attached and detached. The test validates that bpf_cookie isn't mixed up and isn't lost during such list manipulations. Perf_event subtest validates that two BPF links can be created against the same perf_event (but not at the same time, only one BPF program can be attached to perf_event itself), and that for each we can specify different bpf_cookie value. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210815070609.987780-15-andrii@kernel.org
2021-08-17selftests/bpf: Extract uprobe-related helpers into trace_helpers.{c,h}Andrii Nakryiko
Extract two helpers used for working with uprobes into trace_helpers.{c,h} to be re-used between multiple uprobe-using selftests. Also rename get_offset() into more appropriate get_uprobe_offset(). Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210815070609.987780-14-andrii@kernel.org
2021-08-17selftests/bpf: Test low-level perf BPF link APIAndrii Nakryiko
Add tests utilizing low-level bpf_link_create() API to create perf BPF link. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210815070609.987780-13-andrii@kernel.org
2021-08-17libbpf: Add bpf_cookie to perf_event, kprobe, uprobe, and tp attach APIsAndrii Nakryiko
Wire through bpf_cookie for all attach APIs that use perf_event_open under the hood: - for kprobes, extend existing bpf_kprobe_opts with bpf_cookie field; - for perf_event, uprobe, and tracepoint APIs, add their _opts variants and pass bpf_cookie through opts. For kernel that don't support BPF_LINK_CREATE for perf_events, and thus bpf_cookie is not supported either, return error and log warning for user. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210815070609.987780-12-andrii@kernel.org
2021-08-17libbpf: Add bpf_cookie support to bpf_link_create() APIAndrii Nakryiko
Add ability to specify bpf_cookie value when creating BPF perf link with bpf_link_create() low-level API. Given BPF_LINK_CREATE command is growing and keeps getting new fields that are specific to the type of BPF_LINK, extend libbpf side of bpf_link_create() API and corresponding OPTS struct to accomodate such changes. Add extra checks to prevent using incompatible/unexpected combinations of fields. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210815070609.987780-11-andrii@kernel.org
2021-08-17libbpf: Use BPF perf link when supported by kernelAndrii Nakryiko
Detect kernel support for BPF perf link and prefer it when attaching to perf_event, tracepoint, kprobe/uprobe. Underlying perf_event FD will be kept open until BPF link is destroyed, at which point both perf_event FD and BPF link FD will be closed. This preserves current behavior in which perf_event FD is open for the duration of bpf_link's lifetime and user is able to "disconnect" bpf_link from underlying FD (with bpf_link__disconnect()), so that bpf_link__destroy() doesn't close underlying perf_event FD.When BPF perf link is used, disconnect will keep both perf_event and bpf_link FDs open, so it will be up to (advanced) user to close them. This approach is demonstrated in bpf_cookie.c selftests, added in this patch set. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210815070609.987780-10-andrii@kernel.org
2021-08-17libbpf: Remove unused bpf_link's destroy operation, but add deallocAndrii Nakryiko
bpf_link->destroy() isn't used by any code, so remove it. Instead, add ability to override deallocation procedure, with default doing plain free(link). This is necessary for cases when we want to "subclass" struct bpf_link to keep extra information, as is the case in the next patch adding struct bpf_link_perf. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210815070609.987780-9-andrii@kernel.org
2021-08-17libbpf: Re-build libbpf.so when libbpf.map changesAndrii Nakryiko
Ensure libbpf.so is re-built whenever libbpf.map is modified. Without this, changes to libbpf.map are not detected and versioned symbols mismatch error will be reported until `make clean && make` is used, which is a suboptimal developer experience. Fixes: 306b267cb3c4 ("libbpf: Verify versioned symbols") Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20210815070609.987780-8-andrii@kernel.org
2021-08-17bpf: Add bpf_get_attach_cookie() BPF helper to access bpf_cookie valueAndrii Nakryiko
Add new BPF helper, bpf_get_attach_cookie(), which can be used by BPF programs to get access to a user-provided bpf_cookie value, specified during BPF program attachment (BPF link creation) time. Naming is hard, though. With the concept being named "BPF cookie", I've considered calling the helper: - bpf_get_cookie() -- seems too unspecific and easily mistaken with socket cookie; - bpf_get_bpf_cookie() -- too much tautology; - bpf_get_link_cookie() -- would be ok, but while we create a BPF link to attach BPF program to BPF hook, it's still an "attachment" and the bpf_cookie is associated with BPF program attachment to a hook, not a BPF link itself. Technically, we could support bpf_cookie with old-style cgroup programs.So I ultimately rejected it in favor of bpf_get_attach_cookie(). Currently all perf_event-backed BPF program types support bpf_get_attach_cookie() helper. Follow-up patches will add support for fentry/fexit programs as well. While at it, mark bpf_tracing_func_proto() as static to make it obvious that it's only used from within the kernel/trace/bpf_trace.c. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20210815070609.987780-7-andrii@kernel.org
2021-08-17bpf: Allow to specify user-provided bpf_cookie for BPF perf linksAndrii Nakryiko
Add ability for users to specify custom u64 value (bpf_cookie) when creating BPF link for perf_event-backed BPF programs (kprobe/uprobe, perf_event, tracepoints). This is useful for cases when the same BPF program is used for attaching and processing invocation of different tracepoints/kprobes/uprobes in a generic fashion, but such that each invocation is distinguished from each other (e.g., BPF program can look up additional information associated with a specific kernel function without having to rely on function IP lookups). This enables new use cases to be implemented simply and efficiently that previously were possible only through code generation (and thus multiple instances of almost identical BPF program) or compilation at runtime (BCC-style) on target hosts (even more expensive resource-wise). For uprobes it is not even possible in some cases to know function IP before hand (e.g., when attaching to shared library without PID filtering, in which case base load address is not known for a library). This is done by storing u64 bpf_cookie in struct bpf_prog_array_item, corresponding to each attached and run BPF program. Given cgroup BPF programs already use two 8-byte pointers for their needs and cgroup BPF programs don't have (yet?) support for bpf_cookie, reuse that space through union of cgroup_storage and new bpf_cookie field. Make it available to kprobe/tracepoint BPF programs through bpf_trace_run_ctx. This is set by BPF_PROG_RUN_ARRAY, used by kprobe/uprobe/tracepoint BPF program execution code, which luckily is now also split from BPF_PROG_RUN_ARRAY_CG. This run context will be utilized by a new BPF helper giving access to this user-provided cookie value from inside a BPF program. Generic perf_event BPF programs will access this value from perf_event itself through passed in BPF program context. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Yonghong Song <yhs@fb.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/bpf/20210815070609.987780-6-andrii@kernel.org
2021-08-17bpf: Implement minimal BPF perf linkAndrii Nakryiko
Introduce a new type of BPF link - BPF perf link. This brings perf_event-based BPF program attachments (perf_event, tracepoints, kprobes, and uprobes) into the common BPF link infrastructure, allowing to list all active perf_event based attachments, auto-detaching BPF program from perf_event when link's FD is closed, get generic BPF link fdinfo/get_info functionality. BPF_LINK_CREATE command expects perf_event's FD as target_fd. No extra flags are currently supported. Force-detaching and atomic BPF program updates are not yet implemented, but with perf_event-based BPF links we now have common framework for this without the need to extend ioctl()-based perf_event interface. One interesting consideration is a new value for bpf_attach_type, which BPF_LINK_CREATE command expects. Generally, it's either 1-to-1 mapping from bpf_attach_type to bpf_prog_type, or many-to-1 mapping from a subset of bpf_attach_types to one bpf_prog_type (e.g., see BPF_PROG_TYPE_SK_SKB or BPF_PROG_TYPE_CGROUP_SOCK). In this case, though, we have three different program types (KPROBE, TRACEPOINT, PERF_EVENT) using the same perf_event-based mechanism, so it's many bpf_prog_types to one bpf_attach_type. I chose to define a single BPF_PERF_EVENT attach type for all of them and adjust link_create()'s logic for checking correspondence between attach type and program type. The alternative would be to define three new attach types (e.g., BPF_KPROBE, BPF_TRACEPOINT, and BPF_PERF_EVENT), but that seemed like unnecessary overkill and BPF_KPROBE will cause naming conflicts with BPF_KPROBE() macro, defined by libbpf. I chose to not do this to avoid unnecessary proliferation of bpf_attach_type enum values and not have to deal with naming conflicts. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Yonghong Song <yhs@fb.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/bpf/20210815070609.987780-5-andrii@kernel.org
2021-08-16Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds
Pull virtio fixes from Michael Tsirkin: "Fixes in virtio, vhost, and vdpa drivers" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: vdpa/mlx5: Fix queue type selection logic vdpa/mlx5: Avoid destroying MR on empty iotlb tools/virtio: fix build virtio_ring: pull in spinlock header vringh: pull in spinlock header virtio-blk: Add validation for block size in config space vringh: Use wiov->used to check for read/write desc order virtio_vdpa: reject invalid vq indices vdpa: Add documentation for vdpa_alloc_device() macro vDPA/ifcvf: Fix return value check for vdpa_alloc_device() vp_vdpa: Fix return value check for vdpa_alloc_device() vdpa_sim: Fix return value check for vdpa_alloc_device() vhost: Fix the calculation in vhost_overflow() vhost-vdpa: Fix integer overflow in vhost_vdpa_process_iotlb_update() virtio_pci: Support surprise removal of virtio pci device virtio: Protect vqs list access virtio: Keep vring_del_virtqueue() mirror of VQ create virtio: Improve vq->broken access to avoid any compiler optimization
2021-08-15selftest/bpf: Extend the bpf_snprintf() test for "%c".Kuniyuki Iwashima
This patch adds various "positive" patterns for "%c" and two "negative" patterns for wide character. Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210814015718.42704-5-kuniyu@amazon.co.jp
2021-08-15selftest/bpf: Implement sample UNIX domain socket iterator program.Kuniyuki Iwashima
The iterator can output almost the same result compared to /proc/net/unix. The header line is aligned, and the Inode column uses "%8lu" because "%5lu" can be easily overflown. # cat /sys/fs/bpf/unix Num RefCount Protocol Flags Type St Inode Path ffff963c06689800: 00000002 00000000 00010000 0001 01 18697 private/defer ffff963c7c979c00: 00000002 00000000 00000000 0001 01 598245 @Hello@World@ # cat /proc/net/unix Num RefCount Protocol Flags Type St Inode Path ffff963c06689800: 00000002 00000000 00010000 0001 01 18697 private/defer ffff963c7c979c00: 00000002 00000000 00000000 0001 01 598245 @Hello@World@ Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20210814015718.42704-4-kuniyu@amazon.co.jp
2021-08-14Merge tag 'libnvdimm-fixes-5.14-rc6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm Pull libnvdimm fixes from Dan Williams: "A couple of fixes for long standing bugs, a warning fixup, and some miscellaneous dax cleanups. The bugs were recently found due to new platforms looking to use the ACPI NFIT "virtual" device definition, and new error injection capabilities to trigger error responses to label area requests. Ira's cleanups have been long pending, I neglected to send them earlier, and see no harm in including them now. This has all appeared in -next with no reported issues. Summary: - Fix support for NFIT "virtual" ranges (BIOS-defined memory disks) - Fix recovery from failed label storage areas on NVDIMM devices - Miscellaneous cleanups from Ira's investigation of dax_direct_access paths preparing for stray-write protection" * tag 'libnvdimm-fixes-5.14-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: tools/testing/nvdimm: Fix missing 'fallthrough' warning libnvdimm/region: Fix label activation vs errors ACPI: NFIT: Fix support for virtual SPA ranges dax: Ensure errno is returned from dax_direct_access fs/dax: Clarify nr_pages to dax_direct_access() fs/fuse: Remove unneeded kaddr parameter
2021-08-14selftests: mptcp: add testcase for active-backPaolo Abeni
Add more test-case for link failures scenario, including recovery from link failure using only backup subflows and bi-directional transfer. Additionally explicitly check for stale count Co-developed-by: Geliang Tang <geliangtang@gmail.com> Signed-off-by: Geliang Tang <geliangtang@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-13selftests/bpf: Verify bpf_get_netns_cookie in BPF_PROG_TYPE_CGROUP_SOCKOPTStanislav Fomichev
Add extra calls to sockopt_sk.c. Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20210813230530.333779-3-sdf@google.com
2021-08-13Merge tag 'linux-kselftest-fixes-5.14-rc6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pull Kselftest fix from Shuah Khan: "A single patch to sgx test to fix Q1 and Q2 calculation" * tag 'linux-kselftest-fixes-5.14-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: selftests/sgx: Fix Q1 and Q2 calculation in sigstruct.c
2021-08-13selftests/bpf: Fix test_core_autosize on big-endian machinesIlya Leoshkevich
The "probed" part of test_core_autosize copies an integer using bpf_core_read() into an integer of a potentially different size. On big-endian machines a destination offset is required for this to produce a sensible result. Fixes: 888d83b961f6 ("selftests/bpf: Validate libbpf's auto-sizing of LD/ST/STX instructions") Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210812224814.187460-1-iii@linux.ibm.com
2021-08-13Merge tag 'io_uring-5.14-2021-08-13' of git://git.kernel.dk/linux-blockLinus Torvalds
Pull io_uring fixes from Jens Axboe: "A bit bigger than the previous weeks, but mostly just a few stable bound fixes. In detail: - Followup fixes to patches from last week for io-wq, turns out they weren't complete (Hao) - Two lockdep reported fixes out of the RT camp (me) - Sync the io_uring-cp example with liburing, as a few bug fixes never made it to the kernel carried version (me) - SQPOLL related TIF_NOTIFY_SIGNAL fix (Nadav) - Use WRITE_ONCE() when writing sq flags (Nadav) - io_rsrc_put_work() deadlock fix (Pavel)" * tag 'io_uring-5.14-2021-08-13' of git://git.kernel.dk/linux-block: tools/io_uring/io_uring-cp: sync with liburing example io_uring: fix ctx-exit io_rsrc_put_work() deadlock io_uring: drop ctx->uring_lock before flushing work item io-wq: fix IO_WORKER_F_FIXED issue in create_io_worker() io-wq: fix bug of creating io-wokers unconditionally io_uring: rsrc ref lock needs to be IRQ safe io_uring: Use WRITE_ONCE() when writing to sq_flags io_uring: clear TIF_NOTIFY_SIGNAL when running task work
2021-08-13libbpf: Support weak typed ksyms.Hao Luo
Currently weak typeless ksyms have default value zero, when they don't exist in the kernel. However, weak typed ksyms are rejected by libbpf if they can not be resolved. This means that if a bpf object contains the declaration of a nonexistent weak typed ksym, it will be rejected even if there is no program that references the symbol. Nonexistent weak typed ksyms can also default to zero just like typeless ones. This allows programs that access weak typed ksyms to be accepted by verifier, if the accesses are guarded. For example, extern const int bpf_link_fops3 __ksym __weak; /* then in BPF program */ if (&bpf_link_fops3) { /* use bpf_link_fops3 */ } If actual use of nonexistent typed ksym is not guarded properly, verifier would see that register is not PTR_TO_BTF_ID and wouldn't allow to use it for direct memory reads or passing it to BPF helpers. Signed-off-by: Hao Luo <haoluo@google.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210812003819.2439037-1-haoluo@google.com
2021-08-13selftests/bpf: Fix running of XDP bonding testsJussi Maki
An "innocent" cleanup in the last version of the XDP bonding patchset moved the "test__start_subtest" calls to the test main function, but I forgot to reverse the condition, which lead to all tests being skipped. Fix it. Fixes: 6aab1c81b98a ("selftests/bpf: Add tests for XDP bonding") Signed-off-by: Jussi Maki <joamaki@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210811123627.20223-1-joamaki@gmail.com
2021-08-13selftests, bpf: Test that dead ldx_w insns are acceptedIlya Leoshkevich
Prevent regressions related to zero-extension metadata handling during dead code sanitization. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210812151811.184086-3-iii@linux.ibm.com
2021-08-13tools/io_uring/io_uring-cp: sync with liburing exampleJens Axboe
This example is missing a few fixes that are in the liburing version, synchronize with the upstream version. Reported-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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