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2021-01-08selftests/bpf: Remove duplicate include in test_lsmMenglong Dong
'unistd.h' included in 'selftests/bpf/prog_tests/test_lsm.c' is duplicated. Signed-off-by: Menglong Dong <dong.menglong@zte.com.cn> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20210105152047.6070-1-dong.menglong@zte.com.cn Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2021-01-08selftests/bpf: Add tests for user- and non-CO-RE BPF_CORE_READ() variantsAndrii Nakryiko
Add selftests validating that newly added variations of BPF_CORE_READ(), for use with user-space addresses and for non-CO-RE reads, work as expected. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20201218235614.2284956-4-andrii@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2021-01-08libbpf: Add non-CO-RE variants of BPF_CORE_READ() macro familyAndrii Nakryiko
BPF_CORE_READ(), in addition to handling CO-RE relocations, also allows much nicer way to read data structures with nested pointers. Instead of writing a sequence of bpf_probe_read() calls to follow links, one can just write BPF_CORE_READ(a, b, c, d) to effectively do a->b->c->d read. This is a welcome ability when porting BCC code, which (in most cases) allows exactly the intuitive a->b->c->d variant. This patch adds non-CO-RE variants of BPF_CORE_READ() family of macros for cases where CO-RE is not supported (e.g., old kernels). In such cases, the property of shortening a sequence of bpf_probe_read()s to a simple BPF_PROBE_READ(a, b, c, d) invocation is still desirable, especially when porting BCC code to libbpf. Yet, no CO-RE relocation is going to be emitted. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20201218235614.2284956-3-andrii@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2021-01-08libbpf: Add user-space variants of BPF_CORE_READ() family of macrosAndrii Nakryiko
Add BPF_CORE_READ_USER(), BPF_CORE_READ_USER_STR() and their _INTO() variations to allow reading CO-RE-relocatable kernel data structures from the user-space. One of such cases is reading input arguments of syscalls, while reaping the benefits of CO-RE relocations w.r.t. handling 32/64 bit conversions and handling missing/new fields in UAPI data structs. Suggested-by: Gilad Reti <gilad.reti@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20201218235614.2284956-2-andrii@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2021-01-07selftests: fib_nexthops: Fix wrong mausezahn invocationIdo Schimmel
For IPv6 traffic, mausezahn needs to be invoked with '-6'. Otherwise an error is returned: # ip netns exec me mausezahn veth1 -B 2001:db8:101::2 -A 2001:db8:91::1 -c 0 -t tcp "dp=1-1023, flags=syn" Failed to set source IPv4 address. Please check if source is set to a valid IPv4 address. Invalid command line parameters! Fixes: 7c741868ceab ("selftests: Add torture tests to nexthop tests") Signed-off-by: Ido Schimmel <idosch@nvidia.com> Reviewed-by: Petr Machata <petrm@nvidia.com> Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-01-07Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpfJakub Kicinski
Alexei Starovoitov says: ==================== pull-request: bpf 2021-01-07 We've added 4 non-merge commits during the last 10 day(s) which contain a total of 4 files changed, 14 insertions(+), 7 deletions(-). The main changes are: 1) Fix task_iter bug caused by the merge conflict resolution, from Yonghong. 2) Fix resolve_btfids for multiple type hierarchies, from Jiri. * https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf: bpftool: Fix compilation failure for net.o with older glibc tools/resolve_btfids: Warn when having multiple IDs for single type bpf: Fix a task_iter bug caused by a merge conflict resolution selftests/bpf: Fix a compile error for BPF_F_BPRM_SECUREEXEC ==================== Link: https://lore.kernel.org/r/20210107221555.64959-1-alexei.starovoitov@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-01-07KVM: selftests: Implement perf_test_util more conventionallyAndrew Jones
It's not conventional C to put non-inline functions in header files. Create a source file for the functions instead. Also reduce the amount of globals and rename the functions to something less generic. Reviewed-by: Ben Gardon <bgardon@google.com> Reviewed-by: Peter Xu <peterx@redhat.com> Signed-off-by: Andrew Jones <drjones@redhat.com> Message-Id: <20201218141734.54359-4-drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-01-07KVM: selftests: Use vm_create_with_vcpus in create_vmAndrew Jones
Reviewed-by: Ben Gardon <bgardon@google.com> Signed-off-by: Andrew Jones <drjones@redhat.com> Message-Id: <20201218141734.54359-3-drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-01-07KVM: selftests: Factor out guest mode codeAndrew Jones
demand_paging_test, dirty_log_test, and dirty_log_perf_test have redundant guest mode code. Factor it out. Also, while adding a new include, remove the ones we don't need. Reviewed-by: Ben Gardon <bgardon@google.com> Reviewed-by: Peter Xu <peterx@redhat.com> Signed-off-by: Andrew Jones <drjones@redhat.com> Message-Id: <20201218141734.54359-2-drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-01-07Merge branch 'kvm-master' into kvm-nextPaolo Bonzini
Fixes to get_mmio_spte, destined to 5.10 stable branch.
2021-01-07selftests: netfilter: add selftest for ipip pmtu discovery with enabled ↵Florian Westphal
connection tracking Convert Christians bug description into a reproducer. Cc: Shuah Khan <shuah@kernel.org> Reported-by: Christian Perle <christian.perle@secunet.com> Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-01-07tools: selftests: add test for changing routes with PTMU exceptionsSean Tranchetti
Adds new 2 new tests to the PTMU script: pmtu_ipv4/6_route_change. These tests explicitly test for a recently discovered problem in the IPv6 routing framework where PMTU exceptions were not properly released when replacing a route via "ip route change ...". After creating PMTU exceptions, the route from the device A to R1 will be replaced with a new route, then device A will be deleted. If the PMTU exceptions were properly cleaned up by the kernel, this device deletion will succeed. Otherwise, the unregistration of the device will stall, and messages such as the following will be logged in dmesg: unregister_netdevice: waiting for veth_A-R1 to become free. Usage count = 4 Signed-off-by: Sean Tranchetti <stranche@codeaurora.org> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/1609892546-11389-2-git-send-email-stranche@quicinc.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-01-06torture: Compress KASAN vmlinux filesPaul E. McKenney
The sizes of vmlinux files built with KASAN enabled can approach a full gigabyte, which can result in disk overflow sooner rather than later. Fortunately, the xz command compresses them by almost an order of magnitude. This commit therefore uses xz to compress vmlinux file built by torture.sh with KASAN enabled. However, xz is not the fastest thing in the world. In fact, it is way slower than rotating-rust mass storage. This commit therefore also adds a --compress-kasan-vmlinux argument to specify the degree of xz concurrency, which defaults to using all available CPUs if there are that many files in need of compression. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-06torture: Add --kcsan-kmake-arg to torture.sh for KCSANPaul E. McKenney
In 2020, running KCSAN often requires careful choice of compiler. This commit therefore adds a --kcsan-kmake-arg parameter to torture.sh to allow specifying (for example) "CC=clang" to the kernel build process to correctly build a KCSAN-enabled kernel. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-06torture: Add command and results directory to torture.sh logPaul E. McKenney
This commit adds the command and arguments to the torture.sh log file, and also outputs the results directory. This latter allows impatient users to quickly find the results that are being generated by the current run. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-06torture: Allow scenarios to be specified to torture.shPaul E. McKenney
This commit adds --configs-rcutorture, --configs-locktorture, and --configs-scftorture arguments to torture.sh, allowing the desired set of scenarios to be passed to each. The default for each has been changed from a large-system-appropriate set to just CFLIST for each. Users are encouraged to create scripts that provide appropriate settings for their specific systems. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-06torture: Drop log.long generation from torture.shPaul E. McKenney
Now that kvm.sh puts all the relevant details in the "log" file, there is no need for torture.sh to generate a separate "log.long" file. This commit therefore drops this from torture.sh. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-06torture: Make torture.sh refuse to do zero-length runsPaul E. McKenney
This commit causes torture.sh to check for zero-length runs and to take the cowardly option of refusing to run them, logging its cowardice for later inspection. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-06torture: Make torture.sh throttle VERBOSE_TOROUT_*() for refscalePaul E. McKenney
This commit causes torture.sh to use the torture.verbose_sleep_frequency kernel boot parameter to throttle verbose refscale output on large systems. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-06torture: Make torture.sh allmodconfig retain and label outputPaul E. McKenney
This commit places "---" markers in the torture.sh script's allmodconfig output, and uses "<<" to avoid overwriting earlier output from this build test. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-06torture: Create doyesno helper function for torture.shPaul E. McKenney
This commit saves a few lines of code by creating a doyesno helper bash function for argument parsing. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-06torture: Make torture.sh refscale runs use verbose_batched module parameterPaul E. McKenney
On large systems, the refscale printk() rate can overrun the file system's ability to accept console log messages. This commit therefore uses the new verbose_batched module parameter to rate-limit some of the higher-rate printk() calls. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-06torture: Make torture.sh rcuscale and refscale deal with allmodconfigPaul E. McKenney
The .mod.c files created by allmodconfig builds interfers with the approach torture.sh uses to enumerate types of rcuscale and refscale runs. This commit therefore tightens the pattern matching to avoid this interference. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-06torture: Enable torture.sh argument checkingPaul E. McKenney
This commit uncomments the argument checking for the --duration argument to torture.sh. While in the area, it also corrects the duration units from seconds to minutes. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-06torture: Auto-size SCF and scaling runs based on number of CPUsPaul E. McKenney
This commit improves torture.sh flexibility by autoscaling the number of CPUs to be used in variable-CPUs torture tests, including scftorture, refscale, rcuscale, and kvfree. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-06torture: Add "make allmodconfig" to torture.shPaul E. McKenney
This commit adds the ability to do "make allmodconfig" to torture.sh, given that normal rcutorture runs do not normally catch missing exports. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-06torture: Remove use of "eval" in torture.shPaul E. McKenney
The bash "eval" command enables Bobby Tables attacks, which might not be a concern in torture testing by themselves, but one could imagine these combined with a cut-and-paste attack. This commit therefore gets rid of them. This comes at a price in terms of bash quoting not working nicely, so the "--bootargs" argument lists are now passed to torture_one via a bash-variable side channel. This might be a bit ugly, but it will also allow torture.sh to grow its own --bootargs parameter. While in the area, add proper header comments for the bash functions. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-06torture: Make torture.sh use common time-duration bash functionsPaul E. McKenney
This commit makes torture.sh use the new bash functions get_starttime() and get_starttime_duration() created for kvm.sh. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-06torture: Add torture.sh torture-everything scriptPaul E. McKenney
Although tailoring a specific set of kvm.sh runs has served rcutorture testing well over many years, it requires a relatively distraction-free environment, which is not always available. This commit therefore adds a prototype torture.sh script that by default tortures pretty much everything the rcutorture scripting is designed to torture, and which can be given command-line arguments to take a more focused approach. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-06tools/rcutorture: Support nocb toggle in TREE01Frederic Weisbecker
This commit adds periodic toggling of 7 of 8 CPUs every second to TREE01 in order to test NOCB toggle code. Cc: Josh Triplett <josh@joshtriplett.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Lai Jiangshan <jiangshanlai@gmail.com> Cc: Joel Fernandes <joel@joelfernandes.org> Cc: Neeraj Upadhyay <neeraju@codeaurora.org> Cc: Thomas Gleixner <tglx@linutronix.de> Inspired-by: Paul E. McKenney <paulmck@kernel.org> Tested-by: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-06bpftool: Fix compilation failure for net.o with older glibcAlan Maguire
For older glibc ~2.17, #include'ing both linux/if.h and net/if.h fails due to complaints about redefinition of interface flags: CC net.o In file included from net.c:13:0: /usr/include/linux/if.h:71:2: error: redeclaration of enumerator ‘IFF_UP’ IFF_UP = 1<<0, /* sysfs */ ^ /usr/include/net/if.h:44:5: note: previous definition of ‘IFF_UP’ was here IFF_UP = 0x1, /* Interface is up. */ The issue was fixed in kernel headers in [1], but since compilation of net.c picks up system headers the problem can recur. Dropping #include <linux/if.h> resolves the issue and it is not needed for compilation anyhow. [1] https://lore.kernel.org/netdev/1461512707-23058-1-git-send-email-mikko.rapeli__34748.27880641$1462831734$gmane$org@iki.fi/ Fixes: f6f3bac08ff9 ("tools/bpf: bpftool: add net support") Signed-off-by: Alan Maguire <alan.maguire@oracle.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/1609948746-15369-1-git-send-email-alan.maguire@oracle.com
2021-01-05tools/resolve_btfids: Warn when having multiple IDs for single typeJiri Olsa
The kernel image can contain multiple types (structs/unions) with the same name. This causes distinct type hierarchies in BTF data and makes resolve_btfids fail with error like: BTFIDS vmlinux FAILED unresolved symbol udp6_sock as reported by Qais Yousef [1]. This change adds warning when multiple types of the same name are detected: BTFIDS vmlinux WARN: multiple IDs found for 'file': 526, 113351 - using 526 WARN: multiple IDs found for 'sk_buff': 2744, 113958 - using 2744 We keep the lower ID for the given type instance and let the build continue. Also changing the 'nr' variable name to 'nr_types' to avoid confusion. [1] https://lore.kernel.org/lkml/20201229151352.6hzmjvu3qh6p2qgg@e107158-lin/ Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210105234219.970039-1-jolsa@kernel.org
2021-01-05selftests: fix the return value for UDP GRO testPo-Hsu Lin
The udpgro.sh will always return 0 (unless the bpf selftest was not build first) even if there are some failed sub test-cases. Therefore the kselftest framework will report this case is OK. Check and return the exit status of each test to make it easier to spot real failures. Signed-off-by: Po-Hsu Lin <po-hsu.lin@canonical.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-01-05Merge tag 'net-5.11-rc3' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net Pull networking fixes from Jakub Kicinski: "Networking fixes, including fixes from netfilter, wireless and bpf trees. Current release - regressions: - mt76: fix NULL pointer dereference in mt76u_status_worker and mt76s_process_tx_queue - net: ipa: fix interconnect enable bug Current release - always broken: - netfilter: fixes possible oops in mtype_resize in ipset - ath11k: fix number of coding issues found by static analysis tools and spurious error messages Previous releases - regressions: - e1000e: re-enable s0ix power saving flows for systems with the Intel i219-LM Ethernet controllers to fix power use regression - virtio_net: fix recursive call to cpus_read_lock() to avoid a deadlock - ipv4: ignore ECN bits for fib lookups in fib_compute_spec_dst() - sysfs: take the rtnl lock around XPS configuration - xsk: fix memory leak for failed bind and rollback reservation at NETDEV_TX_BUSY - r8169: work around power-saving bug on some chip versions Previous releases - always broken: - dcb: validate netlink message in DCB handler - tun: fix return value when the number of iovs exceeds MAX_SKB_FRAGS to prevent unnecessary retries - vhost_net: fix ubuf refcount when sendmsg fails - bpf: save correct stopping point in file seq iteration - ncsi: use real net-device for response handler - neighbor: fix div by zero caused by a data race (TOCTOU) - bareudp: fix use of incorrect min_headroom size and a false positive lockdep splat from the TX lock - mvpp2: - clear force link UP during port init procedure in case bootloader had set it - add TCAM entry to drop flow control pause frames - fix PPPoE with ipv6 packet parsing - fix GoP Networking Complex Control config of port 3 - fix pkt coalescing IRQ-threshold configuration - xsk: fix race in SKB mode transmit with shared cq - ionic: account for vlan tag len in rx buffer len - stmmac: ignore the second clock input, current clock framework does not handle exclusive clock use well, other drivers may reconfigure the second clock Misc: - ppp: change PPPIOCUNBRIDGECHAN ioctl request number to follow existing scheme" * tag 'net-5.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (99 commits) net: dsa: lantiq_gswip: Fix GSWIP_MII_CFG(p) register access net: dsa: lantiq_gswip: Enable GSWIP_MII_CFG_EN also for internal PHYs net: lapb: Decrease the refcount of "struct lapb_cb" in lapb_device_event r8169: work around power-saving bug on some chip versions net: usb: qmi_wwan: add Quectel EM160R-GL selftests: mlxsw: Set headroom size of correct port net: macb: Correct usage of MACB_CAPS_CLK_HW_CHG flag ibmvnic: fix: NULL pointer dereference. docs: networking: packet_mmap: fix old config reference docs: networking: packet_mmap: fix formatting for C macros vhost_net: fix ubuf refcount incorrectly when sendmsg fails bareudp: Fix use of incorrect min_headroom size bareudp: set NETIF_F_LLTX flag net: hdlc_ppp: Fix issues when mod_timer is called while timer is running atlantic: remove architecture depends erspan: fix version 1 check in gre_parse_header() net: hns: fix return value check in __lb_other_process() net: sched: prevent invalid Scell_log shift count net: neighbor: fix a crash caused by mod zero ipv4: Ignore ECN bits for fib lookups in fib_compute_spec_dst() ...
2021-01-05torture: Do Kconfig analysis only once per scenarioPaul E. McKenney
Currently, if a scenario is repeated as in "--configs '4*TREE01'", the Kconfig analysis is performed for each occurrance (four times in this example) and each analysis places the exact same data into the exact same files. This is not really an issue in this repetition-four example, but it can needlessly consume tens of seconds of wallclock time for something like "--config '128*TINY01'". This commit therefore does Kconfig analysis only once per set of repeats of a given scenario, courtesy of the "sort -u" command and an automatically generated awk script. While in the area, this commit also wordsmiths a comment. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-05cpupower: add Makefile dependencies for install targetsIvan Babrou
This allows building cpupower in parallel rather than serially. Signed-off-by: Ivan Babrou <ivan@cloudflare.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2021-01-04tools/memory-model: Fix typo in klitmus7 compatibility tableAkira Yokosawa
klitmus7 of herdtools7 7.48 or earlier depends on ACCESS_ONCE(), which was removed in Linux v4.15. Fix the obvious typo in the table. Fixes: d075a78a5ab1 ("tools/memory-model/README: Expand dependency of klitmus7") Signed-off-by: Akira Yokosawa <akiyks@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-04tools/memory-model: Remove redundant initialization in litmus testsAkira Yokosawa
This is a revert of commit 1947bfcf81a9 ("tools/memory-model: Add types to litmus tests") with conflict resolutions. klitmus7 [1] is aware of default types of "int" and "int*". It accepts litmus tests for herd7 without extra type info unless non-"int" variables are referenced by an "exists", "locations", or "filter" directive. [1]: Tested with klitmus7 versions 7.49 or later. Suggested-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Akira Yokosawa <akiyks@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-04tools/memory-model: Tie acquire loads to reads-fromPaul E. McKenney
This commit explicitly makes the connection between acquire loads and the reads-from relation. It also adds an entry for happens-before, and refers to the corresponding section of explanation.txt. Reported-by: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-04torture: Allow standalone kvm-recheck.sh run detect --trust-makePaul E. McKenney
Normally, kvm-recheck.sh is run from kvm.sh, which provides the TORTURE_TRUST_MAKE environment variable that, if a non-empty string, indicates that the --trust-make command-line parameter has been passed to kvm.sh. If there was no --trust-make, kvm-recheck.sh insists that the Make.out file contain at least one "CC" command. Thus, when kvm-recheck.sh is run standalone to evaluate a prior --trust-make run, it will incorrectly insist that a proper kernel build did not happen. This commit therefore causes kvm-recheck.sh to also search the "log" file in the top-level results directory for the string "--trust-make". Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-04torture: Remove "Failed to add ttynull console" false positivePaul E. McKenney
Commit 757055ae8ded ("init/console: Use ttynull as a fallback when there is no console") results in the string "Warning: Failed to add ttynull console. No stdin, stdout, and stderr for the init process!" appearing on the console, which the rcutorture scripting interprets as a warning, which causes every rcutorture run to be flagged. However, the rcutorture init process never attempts to do any I/O, and thus does not care that it has no stdin, stdout, or stderr. This commit therefore causes the rcutorture scripting to ignore this message. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-04torture: Simplify exit-code plumbing for kvm-recheck.sh and kvm-find-errors.shPaul E. McKenney
This commit simplifies exit-code plumbing. It makes kvm-recheck.sh return the value 1 for a build error and 2 for a runtime error. It also makes kvm-find-errors.sh avoid checking runtime files for --build-only runs. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-04torture: s/STOP/STOP.1/ to avoid scenario collisionPaul E. McKenney
This commit changes the "STOP" file that is used to cleanly halt a running rcutorture run to "STOP.1" because no scenario directory will ever end with ".1". If there really was a scenario named "STOP", its directories would instead be named "STOP", "STOP.2", "STOP.3", and so on. While in the area, the commit also changes the kernel-run-time checks for this file to look directly in the directory above $resdir, thus avoiding the need to pass the TORTURE_STOPFILE environment variable to remote systems. While in the area, move the STOP.1 file to the top-level directory covering all of the scenarios. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-04torture: Add --dryrun batches to help schedule a distributed runPaul E. McKenney
When all of the remote systems have the same number of CPUs, one approach is to use one "--buildonly" run and one "--dryrun sched" run, and then distributing the batches out one per remote system. However, the output of "--dryrun sched" is not made for parsing, so this commit adds a "--dryrun batches" that provides the same information in easily parsed form. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-04torture: Stop hanging on panicPaul E. McKenney
By default, the "panic" kernel parameter is zero, which causes the kernel to loop indefinitely after a panic(). The rcutorture scripting will eventually kill the corresponding qemu process, but only after waiting for the full run duration plus a few minutes. This works, but delays notifying the developer of the failure. This commit therefore causes the rcutorture scripting to pass the "panic=-1" kernel parameter, which caused the kernel to instead unceremoniously shut down immediately. This in turn causes qemu to terminate, so that if all of the runs in a given batch panic(), the rcutorture scripting can immediately proceed to the next batch. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-04torture: Add kvm.sh test summary to end of log filePaul E. McKenney
This commit adds the test summary to the end of the log in the top-level directory containing the kvm.sh test artifacts. While in the area, it adds the kvm.sh exit code to this test summary. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-04torture: Make kvm.sh include --kconfig arguments in CPU calculationPaul E. McKenney
Currently, passing something like "--kconfig CONFIG_NR_CPUS=2" to kvm.sh has no effect on scenario scheduling. For scenarios that do not specify the number of CPUs, this can result in kvm.sh wastefully scheduling only one scenario at a time even when the --kconfig argument would allow a number to be run concurrently. This commit therefore makes kvm.sh consider the --kconfig arguments when scheduling scenarios across the available CPUs. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-04torture: Make kvm.sh return failure upon build failurePaul E. McKenney
The kvm.sh script uses kvm-find-errors.sh to evaluate whether or not a build failed. Unfortunately, kvm-find-errors.sh returns success if there are no failed runs (including when there are no runs at all) even if there are build failures. This commit therefore makes kvm-find-errors.sh return failure in response to build failures. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-04torture: Print run duration at end of kvm.sh executionPaul E. McKenney
Yes, you can mentally subtract the timestamps, but this commit makes the computer do this work. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-04torture: Make kvm.sh arguments accumulatePaul E. McKenney
Given that kvm.sh in invoked from scripts, it is only natural for different levels of scripting to provide their own Kconfig option values, for example. Unfortunately, right now, the last such argument on the command line wins. This commit therefore makes the --bootargs, --configs, --kconfigs, --kmake-args, and --qemu-args argument values accumulate. For example, where "--configs TREE01 --configs TREE02" would previously have run only scenario TREE02, now it will run both scenarios. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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