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2021-08-23kselftest/arm64: signal: Verify that signals can't change the SVE vector lengthMark Brown1-0/+92
We do not support changing the SVE vector length as part of signal return, verify that this is the case if the system supports multiple vector lengths. Signed-off-by: Mark Brown <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Catalin Marinas <[email protected]>
2021-08-23kselftest/arm64: signal: Check SVE signal frame shows expected vector lengthMark Brown2-0/+69
As a basic check that the SVE signal frame is being set up correctly verify that the vector length in the signal frame is the vector length that the process has. Signed-off-by: Mark Brown <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Catalin Marinas <[email protected]>
2021-08-23kselftest/arm64: signal: Support signal frames with SVE register dataMark Brown1-3/+31
A signal frame with SVE may validly either be a bare struct sve_context or a struct sve_context followed by vector length dependent register data. Support either in the generic helpers for the signal tests, and while we're at it validate the SVE vector length reported. Signed-off-by: Mark Brown <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Catalin Marinas <[email protected]>
2021-08-23kselftest/arm64: signal: Add SVE to the set of features we can check forMark Brown2-0/+5
Allow testcases for SVE signal handling to flag the dependency and be skipped on systems without SVE support. Signed-off-by: Mark Brown <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Catalin Marinas <[email protected]>
2021-08-21selftests/ftrace: Add selftest for testing duplicate eprobes and kprobesSteven Rostedt (VMware)1-0/+38
Add a selftest that makes sure that eprobes and kprobes can not be created with the same group and name as existing events. Link: https://lore.kernel.org/linux-kselftest/[email protected]/ Link: https://lkml.kernel.org/r/[email protected] Cc: "Tzvetomir Stoyanov" <[email protected]> Cc: Tom Zanussi <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Shuah Khan <[email protected]> Cc: [email protected] Acked-by: Masami Hiramatsu <[email protected]> Signed-off-by: Steven Rostedt (VMware) <[email protected]>
2021-08-21selftests/ftrace: Add selftest for testing eprobe events on synthetic eventsSteven Rostedt (VMware)1-0/+53
Add a test to test event probes, by creating a synthetic event across sys_enter_openat and sys_exit_openat that passes the filename pointer from the enter of the system call to the exit, and then add an event probe to the synthetic event to make sure that the file name is seen. Link: https://lore.kernel.org/linux-kselftest/[email protected]/ Link: https://lkml.kernel.org/r/[email protected] Cc: "Tzvetomir Stoyanov" <[email protected]> Cc: Tom Zanussi <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Shuah Khan <[email protected]> Cc: [email protected] Acked-by: Masami Hiramatsu <[email protected]> Signed-off-by: Steven Rostedt (VMware) <[email protected]>
2021-08-21selftests/ftrace: Add test case to test adding and removing of event probeSteven Rostedt (VMware)1-0/+40
Add a test case that adds an event probe, makes sure that it works, and then removes it. Link: https://lore.kernel.org/linux-kselftest/[email protected]/ Link: https://lkml.kernel.org/r/[email protected] Cc: "Tzvetomir Stoyanov" <[email protected]> Cc: Tom Zanussi <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Shuah Khan <[email protected]> Cc: [email protected] Acked-by: Masami Hiramatsu <[email protected]> Signed-off-by: Steven Rostedt (VMware) <[email protected]>
2021-08-21selftests/ftrace: Fix requirement check of README fileSteven Rostedt (VMware)1-1/+1
The selftest for ftrace checks some features by checking if the README has text that states the feature is supported by that kernel. Unfortunately, this check gives false positives because it many not be checked if there's spaces in the string to check. This is due to the compare between the required variable with the ":README" string stripped, because neither has quotes around them. Link: https://lkml.kernel.org/r/[email protected] Cc: "Tzvetomir Stoyanov" <[email protected]> Cc: Tom Zanussi <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Shuah Khan <[email protected]> Cc: [email protected] Cc: [email protected] Fixes: 1b8eec510ba64 ("selftests/ftrace: Support ":README" suffix for requires") Acked-by: Masami Hiramatsu <[email protected]> Signed-off-by: Steven Rostedt (VMware) <[email protected]>
2021-08-20KVM: selftests: test KVM_GUESTDBG_BLOCKIRQMaxim Levitsky1-3/+21
Modify debug_regs test to create a pending interrupt and see that it is blocked when single stepping is done with KVM_GUESTDBG_BLOCKIRQ Signed-off-by: Maxim Levitsky <[email protected]> Message-Id: <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
2021-08-20KVM: selftests: Add checks for histogram stats bucket_size fieldJing Zhang1-0/+12
The bucket_size field should be non-zero for linear histogram stats and should be zero for other stats types. Reviewed-by: David Matlack <[email protected]> Signed-off-by: Jing Zhang <[email protected]> Message-Id: <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
2021-08-20selftests/ftrace: Add clear_dynamic_events() to test casesSteven Rostedt (VMware)1-0/+22
Add a function to remove all dynamic events from the tracing directory. It requires a loop as some of the dynamic events may depend on others being removed first. Also add a safety that prevents it from looping infinitely due to a bug where an event never gets removed. Link: https://lkml.kernel.org/r/[email protected] Cc: "Tzvetomir Stoyanov" <[email protected]> Cc: Tom Zanussi <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Shuah Khan <[email protected]> Cc: [email protected] Acked-by: Masami Hiramatsu <[email protected]> Signed-off-by: Steven Rostedt (VMware) <[email protected]>
2021-08-20tools/net: Use bitwise instead of arithmetic operator for flagsjing yangyang1-2/+2
This silences the following coccinelle warning: "WARNING: sum of probable bitmasks, consider |" Reported-by: Zeal Robot <[email protected]> Signed-off-by: jing yangyang <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2021-08-20kselftest/arm64: pac: Fix skipping of tests on systems without PACMark Brown1-4/+6
The PAC tests check to see if the system supports the relevant PAC features but instead of skipping the tests if they can't be executed they fail the tests which makes things look like they're not working when they are. Signed-off-by: Mark Brown <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Catalin Marinas <[email protected]>
2021-08-20kselftest/arm64: mte: Fix misleading output when skipping testsMark Brown1-1/+1
When skipping the tests due to a lack of system support for MTE we currently print a message saying FAIL which makes it look like the test failed even though the test did actually report KSFT_SKIP, creating some confusion. Change the error message to say SKIP instead so things are clearer. Signed-off-by: Mark Brown <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Catalin Marinas <[email protected]>
2021-08-19Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski2-20/+33
drivers/ptp/Kconfig: 55c8fca1dae1 ("ptp_pch: Restore dependency on PCI") e5f31552674e ("ethernet: fix PTP_1588_CLOCK dependencies") Signed-off-by: Jakub Kicinski <[email protected]>
2021-08-20selftests/bpf: Add tests for {set|get} socket option from setsockopt BPFPrankur Gupta3-0/+127
Adding selftests for the newly added functionality to call bpf_setsockopt() and bpf_getsockopt() from setsockopt BPF programs. Test Details: 1. BPF Program Checks for changes in IPV6_TCLASS(SOL_IPV6) via setsockopt If the cca for the socket is not cubic do nothing If the newly set value for IPV6_TCLASS is 45 (0x2d) (as per our use-case) then change the cc from cubic to reno 2. User Space Program Creates an AF_INET6 socket and set the cca for that to be "cubic" Attach the program and set the IPV6_TCLASS to 0x2d using setsockopt Verify the cca for the socket changed to reno Signed-off-by: Prankur Gupta <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: Song Liu <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-08-19Merge tag 'net-5.14-rc7' of ↵Linus Torvalds1-0/+12
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net Pull networking fixes from Jakub Kicinski: "Networking fixes, including fixes from bpf, wireless and mac80211 trees. Current release - regressions: - tipc: call tipc_wait_for_connect only when dlen is not 0 - mac80211: fix locking in ieee80211_restart_work() Current release - new code bugs: - bpf: add rcu_read_lock in bpf_get_current_[ancestor_]cgroup_id() - ethernet: ice: fix perout start time rounding - wwan: iosm: prevent underflow in ipc_chnl_cfg_get() Previous releases - regressions: - bpf: clear zext_dst of dead insns - sch_cake: fix srchost/dsthost hashing mode - vrf: reset skb conntrack connection on VRF rcv - net/rds: dma_map_sg is entitled to merge entries Previous releases - always broken: - ethernet: bnxt: fix Tx path locking and races, add Rx path barriers" * tag 'net-5.14-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (42 commits) net: dpaa2-switch: disable the control interface on error path Revert "flow_offload: action should not be NULL when it is referenced" iavf: Fix ping is lost after untrusted VF had tried to change MAC i40e: Fix ATR queue selection r8152: fix the maximum number of PLA bp for RTL8153C r8152: fix writing USB_BP2_EN mptcp: full fully established support after ADD_ADDR mptcp: fix memory leak on address flush net/rds: dma_map_sg is entitled to merge entries net: mscc: ocelot: allow forwarding from bridge ports to the tag_8021q CPU port net: asix: fix uninit value bugs ovs: clear skb->tstamp in forwarding path net: mdio-mux: Handle -EPROBE_DEFER correctly net: mdio-mux: Don't ignore memory allocation errors net: mdio-mux: Delete unnecessary devm_kfree net: dsa: sja1105: fix use-after-free after calling of_find_compatible_node, or worse sch_cake: fix srchost/dsthost hashing mode ixgbe, xsk: clean up the resources in ixgbe_xsk_pool_enable error path net: qlcnic: add missed unlock in qlcnic_83xx_flash_read32 mac80211: fix locking in ieee80211_restart_work() ...
2021-08-19selftests/bpf: Adding delay in socketmap_listen to reduce flakynessYucong Sun1-3/+9
This patch adds a 1ms delay to reduce flakyness of the test. Signed-off-by: Yucong Sun <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-08-19selftests: KVM: Introduce psci_cpu_on_testOliver Upton4-0/+126
Introduce a test for aarch64 that ensures CPU resets induced by PSCI are reflected in the target vCPU's state, even if the target is never run again. This is a regression test for a race between vCPU migration and PSCI. Reviewed-by: Andrew Jones <[email protected]> Signed-off-by: Oliver Upton <[email protected]> Signed-off-by: Marc Zyngier <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2021-08-19selftests/bpf: Test for get_netns_cookieXu Liu2-0/+100
Add test to use get_netns_cookie() from BPF_PROG_TYPE_SOCK_OPS. Signed-off-by: Xu Liu <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: Song Liu <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-08-18lkdtm/fortify: Consolidate FORTIFY_SOURCE testsKees Cook1-0/+2
The FORTIFY_SOURCE tests were split between bugs.c and fortify.c. Move tests into fortify.c, standardize their naming, add CONFIG hints, and add them to the lkdtm selftests. Cc: Arnd Bergmann <[email protected]> Signed-off-by: Kees Cook <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
2021-08-18lkdtm/bugs: Add ARRAY_BOUNDS to selftestsKees Cook2-0/+3
Add CONFIG hints about why the ARRAY_BOUNDS test might fail, and similarly include the CONFIGs needed to pass the ARRAY_BOUNDS test via the selftests, and add to selftests. Cc: [email protected] Suggested-by: Guillaume Tucker <[email protected]> Signed-off-by: Kees Cook <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
2021-08-18selftests: vrf: Add test for SNAT over VRFLahav Schlesinger1-0/+28
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 <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2021-08-18selftests: nci: Add the NCI testcase reading T4T TagBongsu Jeon1-5/+287
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 <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2021-08-18selftests: nci: Extract the start/stop discovery functionBongsu Jeon1-15/+38
To reuse the start/stop discovery code in other testcase, extract the code. Signed-off-by: Bongsu Jeon <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2021-08-18selftests: nci: Add the flags parameter for the send_cmd_mt_nlaBongsu Jeon1-8/+8
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 <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2021-08-18selftests: nci: Fix the wrong conditionBongsu Jeon1-1/+1
memcpy should be executed only in case nla_len's value is greater than 0. Signed-off-by: Bongsu Jeon <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2021-08-18selftests: nci: Fix the code for next nlattr offsetBongsu Jeon1-2/+2
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 <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2021-08-18selftests: nci: Fix the typoBongsu Jeon1-12/+12
Fix typo: rep_len -> resp_len Signed-off-by: Bongsu Jeon <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2021-08-18selftests: nci: Remove the polling code to read a NCI frameBongsu Jeon1-22/+11
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 <[email protected]> Reviewed-by: Krzysztof Kozlowski <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2021-08-18selftests: mptcp: delete uncontinuous removing idsGeliang Tang1-4/+6
The removing addresses testcases can only deal with the continuous ids. This patch added the uncontinuous removing ids support. Signed-off-by: Geliang Tang <[email protected]> Signed-off-by: Mat Martineau <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2021-08-18selftests: mptcp: add fullmesh testcasesGeliang Tang1-2/+62
This patch added the testcases for the fullmesh address flag of the path manager. Co-developed-by: Matthieu Baerts <[email protected]> Signed-off-by: Matthieu Baerts <[email protected]> Signed-off-by: Geliang Tang <[email protected]> Signed-off-by: Mat Martineau <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2021-08-18selftests: mptcp: set and print the fullmesh flagGeliang Tang1-1/+15
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 <[email protected]> Signed-off-by: Mat Martineau <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2021-08-18selftests/powerpc: Remove duplicated include from tm-poison.cZheng Yongjun1-1/+0
Remove duplicated include. Reported-by: Hulk Robot <[email protected]> Signed-off-by: Zheng Yongjun <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2021-08-17selftests/bpf: Fix flaky send_signal testYonghong Song1-0/+16
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 <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-08-17selftests/bpf: Replace CHECK with ASSERT_* macros in send_signal.cYonghong Song1-25/+20
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 <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-08-17selftests/bpf: Support glob matching for test selector.Yucong Sun1-16/+62
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 <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-08-17selftests/bpf: Also print test name in subtest status messageYucong Sun1-2/+2
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 <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-08-17selftests/bpf: Correctly display subtest skip statusYucong Sun1-12/+13
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 <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-08-17selftests/bpf: Skip loading bpf_testmod when using -l to list tests.Yucong Sun1-2/+2
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 <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-08-17selftests/bpf: Add exponential backoff to map_delete_retriable in test_mapsYucong Sun1-1/+6
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 <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-08-17selftests: net: improved IOAM testsJustin Iurman2-401/+1074
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 <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2021-08-16selftests/bpf: Add exponential backoff to map_update_retriable in test_mapsYucong Sun1-1/+8
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 <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Acked-by: Song Liu <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-08-16selftest/bpf: Add new tests in sockmap for unix stream to tcp.Jiang Wang1-4/+12
Add two new test cases in sockmap tests, where unix stream is redirected to tcp and vice versa. Signed-off-by: Jiang Wang <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Reviewed-by: Cong Wang <[email protected]> Acked-by: John Fastabend <[email protected]> Acked-by: Jakub Sitnicki <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-08-16selftest/bpf: Change udp to inet in some function namesJiang Wang1-13/+17
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 <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Reviewed-by: Cong Wang <[email protected]> Acked-by: John Fastabend <[email protected]> Acked-by: Jakub Sitnicki <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-08-16selftest/bpf: Add tests for sockmap with unix stream type.Jiang Wang1-0/+2
Add two tests for unix stream to unix stream redirection in sockmap tests. Signed-off-by: Jiang Wang <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Reviewed-by: Cong Wang <[email protected]> Acked-by: Jakub Sitnicki <[email protected]> Acked-by: John Fastabend <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-08-16selftests/bpf: Test btf__load_vmlinux_btf/btf__load_module_btf APIsHengqi Chen1-0/+34
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 <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-08-17selftests/bpf: Add ref_ctr_offset selftestsAndrii Nakryiko3-11/+50
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 <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-08-17selftests/bpf: Add bpf_cookie selftests for high-level APIsAndrii Nakryiko2-0/+339
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 <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2021-08-17selftests/bpf: Extract uprobe-related helpers into trace_helpers.{c,h}Andrii Nakryiko3-60/+70
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 <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
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