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* Makefile: Extend noinline workarounds for LTO and -O2 to gcc 12Stefano Brivio2022-09-291-3/+3
| | | | | | | | | | | | | | | | Commit 1a563a0cbd49 ("passt: Address gcc 11 warnings") works around an issue where the remote address passed to hash functions is seen as uninitialised by gcc, with -flto and -O2. It turns out we get the same exact behaviour on gcc 12.1 and 12.2, so extend the applicability of the same workaround to gcc 12. Don't go further than that, though: should the issue reported at: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78993 happen to be fixed in a later version of gcc, we won't need the noinline attributes anymore. Otherwise, we'll notice. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cppcheck: Remove unused unmatchedSuppression suppressionsDavid Gibson2022-09-291-3/+0
| | | | | | | | | | | It's unclear what original suppressions these unmatchedSuppression suppressions were supposed to go with. They don't trigger any warnings on the current code that I can tell, so remove them. If we find a problem with some cppcheck versions in future, replace them with inline suppressions so it's clearer exactly where the issue is originating. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Mark unused functions for cppcheckDavid Gibson2022-09-291-1/+0
| | | | | | | | | | We have a couple of functions that are unused (for now) by design. Although at least one has a flag so that gcc doesn't warn, cppcheck has its own warnings about this. Add specific inline suppressions for these rather than a blanket suppression in the Makefile. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cppcheck: Remove unused va_list_usedBeforeStarted suppressionDavid Gibson2022-09-291-2/+0
| | | | | | | | | I can't get this warning to trigger, even without the suppression, so remove it. If it shows up again on some cppcheck version, we can replace it with inline suppressions so it's clear where the issue lay. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cppcheck: Remove unused objectIndex suppressionsDavid Gibson2022-09-291-3/+0
| | | | | | | | | | I can't get these warnings to trigger on the cppcheck versions I have, so remove them. If we find in future we need to replace these, they should be replaced with inline suppressions so its clear what's the section of code at issue. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cppcheck: Remove unused knownConditionTrueFalse suppressionDavid Gibson2022-09-291-2/+0
| | | | | | | | | | | | | | I can't get this warning to trigger, so I think this suppression must be out of date. Whether that's because we've changed our code to no longer have the problem, or because cppcheck itself has been updated to remove a false positive I don't know. If we find that we do need a suppression like this for some cppcheck version, we should replace it with an inline suppression so it's clear what exactly is triggering the warning. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Regenerate seccomp.h if seccomp.sh changesDavid Gibson2022-09-291-2/+2
| | | | | | | | seccomp.sh generates seccomp.h, so if we change it, we should re-build seccomp.h as well. Add this to the make dependencies so it happens. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cppcheck: Remove localtime suppression for pcap.cDavid Gibson2022-09-291-1/+0
| | | | | | | | | Since bf95322f "conf: Make the argument to --pcap option mandatory" we no longer call localtime() in pcap.c, so we no longer need the matching cppcheck suppression. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cppcheck: Broaden suppression for unused struct membersDavid Gibson2022-09-291-2/+1
| | | | | | | | | | | | | | | | In a number of places in passt we use structures to represent over the wire or in-file data with a fixed layout. After initialization we don't access the fields individually and just write the structure as a whole to its destination. Unfortunately cppcheck doesn't cope with this pattern and thinks all the structure members are unused. We already have suppressions for this in pcap.c and dhcp.c However, it also appears in dhcp.c and netlink.c at least. Since this is likely to be common, it seems wiser to just suppress the error globally. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cppcheck: Use inline suppression for strtok() in conf.cDavid Gibson2022-09-291-1/+0
| | | | | | | | | | | strtok() is non-reentrant and old-fashioned, so cppcheck would complains about its use in conf.c if it weren't suppressed. We're single threaded and strtok() is convenient though, so it's not really worth reworking at this time. Convert this to an inline suppression so it's adjacent to the code its annotating. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cppcheck: Use inline suppressions for qrap.cDavid Gibson2022-09-291-2/+1
| | | | | | | | | qrap.c uses several old-fashioned functions that cppcheck complains about. Since it's headed for obselesence anyway, just suppress these rather than attempting to modernize the code. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cppcheck: Use inline suppression for ffsl()David Gibson2022-09-291-2/+0
| | | | | | | | | | We define our own ffsl() as a weak symbol, in case our C library doesn't include it. On glibc systems which *do* include it, this causes a cppcheck warning because unsurprisingly our version doesn't pick the same argument names. Convert the suppression for this into an inline suppression. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Clean up parsing in conf_runas()David Gibson2022-09-291-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | conf_runas() handles several of the different possible cases for the --runas argument in a slightly odd order. Although it can parse both numeric UIDs/GIDs and user/group names, it can't parse a numeric UID combined with a group name or vice versa. That's not obviously useful, but it's slightly surprising gap to have. Rework the parsing to be more systematic: first split the option into user and (optional) group parts, then separately parse each part as either numeric or a name. As a bonus this removes some clang-tidy warnings. While we're there also add cppcheck suppressions for getpwnam() and getgrnam(). It complains about those because they're not reentrant. passt is single threaded though, and is always likely to be during this initialization code, even if we multithread later. There were some existing suppressions for these in the cppcheck invocation but they're no longer up to date. Replace them with inline suppressions which, being next to the code, are more likely to stay correct. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cppcheck: Add target specific headersDavid Gibson2022-09-291-1/+1
| | | | | | | | | Debian and similar distros put target specific header files in /usr/include/<arch-vendor-os>, rather than directly in /usr/include. Add this directory to the includes for cppcheck so it can find them. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Makefile: Simplify getting target triple for compilerDavid Gibson2022-09-291-2/+2
| | | | | | | | | | We do some manipulation of the output of cc -v to get the target triple for the platform, to locate headers for cppcheck. However, we can get this more easily with cc -dumpmachine - and in fact we do so elsewhere in the Makefile. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cppcheck: Run quietlyDavid Gibson2022-09-291-1/+1
| | | | | | | | Adding the --quiet option to cppcheck makes the actual errors and warnings easier to find. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cppcheck: Avoid excessive scanning due to system headersDavid Gibson2022-09-291-14/+6
| | | | | | | | | | | | | | | | | make cppcheck takes a long time, because it checks a large number of different configurations. It's assembling this very large set of configurations not because of conditionals in the passt code itself, but from those in the system headers. By adding --config-exclude directives to stop considering those configs, make cppcheck becomes around 60x faster on my system. Similarly, any problems that are found in the system headers are not our problem, and so we can uniformly suppress them, rather than having specific suppressions for particular problems in particular files (which might not be correct for all different distro / version combinations either). Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* clang-tidy: Disable 'readability-identifier-length'David Gibson2022-09-291-1/+6
| | | | | | | | This check complains about any identifier of less than 3 characters. For locals and parameters this is often pointlessly verbose. Disable it. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Improve types and names for port forwarding configurationDavid Gibson2022-09-241-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | enum conf_port_type is local to conf.c and is used to track the port forwarding mode during configuration. We don't keep it around in the context structure, however the 'init_detect_ports' and 'ns_detect_ports' fields in the context are based solely on this. Rather than changing encoding, just include the forwarding mode into the context structure. Move the type definition to a new port_fwd.h, which is kind of trivial at the moment but will have more stuff later. While we're there, "conf_port_type" doesn't really convey that this enum is describing how port forwarding is configured. Rename it to port_fwd_mode. The variables (now fields) of this type also have mildly confusing names since it's not immediately obvious whether 'ns' and 'init' refer to the source or destination of the packets. Use "in" (host to guest / init to ns) and "out" (guest to host / ns to init) instead. This has the added bonus that we no longer have locals 'udp_init' and 'tcp_init' which shadow global functions. In addition, add a typedef 'port_fwd_map' for a bitmap of each port number, which is used in several places. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Fix the name of the qemu-system-* executableVasiliy Ulyanov2022-09-241-4/+4
| | | | | | | | | | | | | | | Define the target machine architecture in lowercase. The name of the executable qemu-system-* is defined from the build flags and should be in lowercase: ( "qemu-system-" ARCH ), I.e. qemu-system-x86_64 instead of qemu-system-X86_64. Otherwise, the exec call will fail. Signed-off-by: Vasiliy Ulyanov <vulyanov@suse.de> Signed-off-by: Dario Faggioli <dfaggioli@suse.com>
* Makefile: Include seccomp.h in HEADERS and require it for static checkersStefano Brivio2022-09-221-3/+3
| | | | | | | | Targets running static checkers (cppcheck and clang-tidy) need seccomp.h, but the latter is not included in HEADERS. Add it. Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
* Makefile: Allow define overrides by prepending, not appending, CFLAGSStefano Brivio2022-09-221-24/+25
| | | | | | | | | | | | | | | | | | | If we append CFLAGS to the ones passed via command line (if any), -D options we append will override -D options passed on command line (if any). For example, OpenSUSE build flags include -D_FORTIFY_SOURCE=3, and we want to have -D_FORTIFY_SOURCE=2, if and only if not overridden. The current behaviour implies we redefine _FORTIFY_SOURCE as 2, though. Instead of appending CFLAGS, prepend them by adding all the default build flags to another variable, a simply expanded one (defined with :=), named FLAGS, and pass that *before* CFLAGS in targets, so that defines from command line can override default flags. Reported-by: Dario Faggioli <dfaggioli@suse.com> Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Tested-by: Dario Faggioli <dfaggioli@suse.com>
* Move self-isolation code into a separate fileDavid Gibson2022-09-131-4/+4
| | | | | | | | passt/pasta contains a number of routines designed to isolate passt from the rest of the system for security. These are spread through util.c and passt.c. Move them together into a new isolation.c file. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Makefile: Honour LDFLAGS for binary targetsStefano Brivio2022-09-071-3/+3
| | | | | | | | | | | | | We don't set any, but we should use them if they are passed in the environment. On a Fedora Rawhide package build, annocheck (https://sourceware.org/annobin/) reports: Hardened: /usr/bin/passt: FAIL: bind-now test because not linked with -Wl,-z,now ...despite the build system exporting -Wl,-z,now in LDFLAGS. Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
* Makefile: Use more GNU-style directory variables, explicit docdir for OpenSUSE2022_08_21.7b71094Stefano Brivio2022-08-211-11/+17
| | | | | | | | | | | | | It turns out that, while on most distributions "docdir" would be /usr/share/doc, it's /usr/share/doc/packages/ on OpenSUSE Tumbleweed. Use an explicit docdir as shown in: https://en.opensuse.org/openSUSE:Build_Service_cross_distribution_howto and don't unnecessarily hardcode directory variables in the Makefile. Otherwise, RPM builds for OpenSUSE will fail now that we have a README there. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Makefile: Install demo.sh too, uninstall stuff under /usr/shareStefano Brivio2022-08-201-0/+4
| | | | | Suggested-by: Benson Muite <benson_muite@emailplus.org> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Makefile: Ugly hack to get a "plain" Markdown version of READMEStefano Brivio2022-08-201-3/+27
| | | | | | | | | | | | | | | | | | Distribution packages reasonably expect to have a human-readable Markdown version of the README under /usr/share/doc/, but all we have right now is a heavily web-oriented version. Introduce a ugly hack to strip web-oriented parts from the current README and install it. It should probably work the other way around: a human-readable README could be used as a source for the web page. But cgit needs a file that's in the tree, not something that can be built, and https://passt.top/ is based on cgit. It should eventually be doable to work around this in cgit, instead. Reported-by: Benson Muite <benson_muite@emailplus.org> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* valgrind needs futexDavid Gibson2022-07-221-1/+1
| | | | | | | | | Some versions of valgrind (such as the version on my Fedora laptop - valgrind-3.19.0-3.fc36.x86_64) use futexes. But futex is currently not allowed in the seccomp filter, even with the extra calls added for valgrind builds. Add it, to avoid spurious valgrind failures. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* passt: Allow exit_group() system call in seccomp profilesStefano Brivio2022-07-141-1/+1
| | | | | | | | | | | | We handle SIGQUIT and SIGTERM calling exit(), which is usually implemented with the exit_group() system call. If we don't allow exit_group(), we'll get a SIGSYS while handling SIGQUIT and SIGTERM, which means a misleading non-zero exit code. Reported-by: Wenli Quan <wquan@redhat.com> Link: https://bugzilla.redhat.com/show_bug.cgi?id=2101990 Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Clean up passt.pid fileDavid Gibson2022-07-141-1/+2
| | | | | | | | If the tests are interrupted at the right point a passt.pid file can be left over. Clean it up with "make clean" and add it to .gitignore so it doesn't get accidentally committed. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Add cleaner line-by-line reading primitivesDavid Gibson2022-07-061-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Two places in passt need to read files line by line (one parsing resolv.conf, the other parsing /proc/net/*. They can't use fgets() because in glibc that can allocate memory. Instead they use an implementation line_read() in util.c. This has some problems: * It has two completely separate modes of operation, one buffering and one not, the relation between these and how they're activated is subtle and confusing * At least in non-buffered mode, it will mishandle an empty line, folding them onto the start of the next non-empty line * In non-buffered mode it will use lseek() which prevents using this on non-regular files (we don't need that at present, but it's a surprising limitation) * It has a lot of difficult to read pointer mangling Add a new cleaner implementation of allocation-free line-by-line reading in lineread.c. This one always buffers, using a state structure to keep track of what we need. This is larger than I'd like, but it turns out handling all the edge cases of line-by-line reading in C is surprisingly hard. This just adds the code, subsequent patches will change the existing users of line_read() to the new implementation. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Makefile: Don't create extraneous -.s fileDavid Gibson2022-06-181-1/+1
| | | | | | | | | | In order to probe availability of certain features the Makefile test compiles a handful of tiny snippets, feeding those in from stdin. However in one case - the one for -fstack-protector - it forgets to redirect the output to stdout, meaning it creates a stray '-.s' file when make is invoked (even make clean). Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Makefile: Tweak $(RM) usageDavid Gibson2022-06-181-3/+3
| | | | | | | | | | | The use of rm commands in the clean and uninstall targets adds an explicit leading - to ignore errors. However the built-in RM variable in make is actually "rm -f" which already ignores errors, so the - isn't neccessary. Also replace ${RM} with $(RM) which is the more conventional form in Makefiles. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Makefile: Simplify pasta* targets with a pattern ruleDavid Gibson2022-06-181-8/+2
| | | | | | | | pasta, pasta.avx2 and pasta.1 are all generated as a link to the corresponding passt file. We can consolidate the 3 rules for these targets into a single pattern rule. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Makefile: Use $(BIN) and $(MANPAGES) variable to simplify several targetsDavid Gibson2022-06-181-14/+12
| | | | | | | | | | | | | | There are several places which explicitly list the various generated binaries, even though a $(BIN) variable already lists them. There are several more places that list all the manpage files, introduce a $(MANPAGES) variable to remove that repetition as well. Tweak the generation of pasta.1 as a link to passt.1 so it's not just made as a side effect of the pasta target. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> [sbrivio: add passt.1 and qrap.1 to guest files for distro tests] Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Makefile: Avoid using wildcard sourcesDavid Gibson2022-06-181-15/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | The passt/pasta Makefile makes fairly heavy use of GNU make's $(wildcard) function to locate the sources and headers to build. Using wildcards for the things to compile is usually a bad idea though: if somehow you end up with a .c or .h file in your tree you didn't expect it can misbuild in an exceedingly confusing way. In particular this can sometimes happen if switching between releases / branches where files have been added or removed without 100% cleaning the tree. It also makes life a bit complicated if building multiple different binaries in the same tree: we already have some rather awkward $(filter-out) constructions to avoid including qrap.c in the passt build. Replace use of $(wildcard) with the more idiomatic approach of defining variables listing all the relevant source files then using that throughout. In the rule for seccomp.h there was also a bare "*.c" which caused make to always rebuild that target. Fix that as well. Similarly, seccomp.sh uses a wildcard to locate the sources, which is unwise for the same reasons. Make it take the sources to examine on the command line instead, and have the Makefile pass them in from the same variables. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Makefile: Suppress unusedStructMember Cppcheck warning in dhcp.cStefano Brivio2022-06-181-0/+2
| | | | | | | | | | | | | | | New from Cppcheck 2.8: all the fields of struct msg that are not directly manipulated are now reported as unused, which is kind of correct as those fields are used as a blob "copied" from request to response and not as separate fields. However, keeping the message composition explicit is probably desirable, and adding inline suppressions makes the whole thing rather unreadable, so just suppress unusedStructMember warnings for dhcp.c, while also adding a suppression for unmatched suppressions to keep earlier versions of Cppcheck happy. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Makefile: Allow implicit test for bugprone-suspicious-string-compare checkerStefano Brivio2022-03-291-4/+1
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* treewide: Fix android-cloexec-* clang-tidy warnings, re-enable checksStefano Brivio2022-03-291-9/+0
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* test, seccomp, Makefile: Switch to valgrind runs for passt functional testsStefano Brivio2022-03-291-1/+7
| | | | | | | | | | | | | | Pass to seccomp.sh a list of additional syscalls valgrind needs as EXTRA_SYSCALLS in a new 'valgrind' make target, and add corresponding support in seccomp.sh itself. In test setup functions, start passt with valgrind, but not for performance tests. Add tests checking that valgrind exits without errors after all the other tests in the group are done. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Makefile: Enable a few hardening flagsStefano Brivio2022-03-281-2/+8
| | | | | | | They don't have a measurable performance impact and make things a bit safer. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Makefile, hooks: Static target precondition for pkgs, copy .avx2 buildsStefano Brivio2022-03-011-1/+1
| | | | | | Convenience packages are anyway built from static builds. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* passt, pasta: Run-time selection of AVX2 buildStefano Brivio2022-02-281-10/+28
| | | | | | | | | | | | | Build-time selection of AVX2 flags and routines is not practical for distributions, but limiting AVX2 usage to checksum routines with specific run-time detection doesn't allow for easy performance gains from auto-vectorisation of batched packet handling routines. For x86_64, build non-AVX2 and AVX2 binaries, and implement a simple wrapper replacing the current executable with the AVX2 build if it's available, and if AVX2 is supported by the current CPU. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Makefile: Fix up AUDIT_ARCH for armv6l, armv7lStefano Brivio2022-02-261-0/+1
| | | | | | | There's a single AUDIT_ARCH_ARM define available (and big-endian shouldn't be a concern with those). Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* pasta: By default, quit if filesystem-bound net namespace goes awayStefano Brivio2022-02-211-1/+2
| | | | | | | | | | | | This should be convenient for users managing filesystem-bound network namespaces: monitor the base directory of the namespace and exit if the namespace given as PATH or NAME target is deleted. We can't add an inotify watch directly on the namespace directory, that won't work with nsfs. Add an option to disable this behaviour, --no-netns-quit. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Makefile, conf, passt: Drop passt4netns references, explicit argc checkStefano Brivio2022-02-211-5/+2
| | | | | | | | | | | Nobody currently calls this as passt4netns, that was the name I used before 'pasta', drop any reference before it's too late. While at it, explicitly check that argc is bigger than or equal to one, just as a defensive measure: argv[0] being NULL is not an issue anyway. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* passt: Address new clang-tidy warnings from LLVM 13.0.1Stefano Brivio2022-01-301-1/+23
| | | | | | | | | | | | | | | | | | | | | | | | | clang-tidy from LLVM 13.0.1 reports some new warnings from these checkers: - altera-unroll-loops, altera-id-dependent-backward-branch: ignore for the moment being, add a TODO item - bugprone-easily-swappable-parameters: ignore, nothing to do about those - readability-function-cognitive-complexity: ignore for the moment being, add a TODO item - altera-struct-pack-align: ignore, alignment is forced in protocol headers - concurrency-mt-unsafe: ignore for the moment being, add a TODO item Fix bugprone-implicit-widening-of-multiplication-result warnings, though, that's doable and they seem to make sense. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* tcp, netlink, HAS{BYTES_ACKED,MIN_RTT,GETRANDOM} and NETLINK_GET_STRICT_CHKStefano Brivio2022-01-261-0/+15
| | | | | | | | | | | | | | | | tcpi_bytes_acked and tcpi_min_rtt are only available on recent kernel versions: provide fall-back paths (incurring some grade of performance penalty). Support for getrandom() was introduced in Linux 3.17 and glibc 2.25: provide an alternate mechanism for that as well, reading from /dev/random. Also check if NETLINK_GET_STRICT_CHK is defined before using it: it's not strictly needed, we'll filter out irrelevant results from netlink anyway. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Makefile, seccomp: Fix build for i386, ppc64, ppc64leStefano Brivio2022-01-261-2/+12
| | | | | | | | | | | | | | | | | On some distributions, on ppc64, ulimit -s returns 'unlimited': add a reasonable default, and also make sure ulimit is invoked using the default shell, which should ensure ulimit is actually implemented. Also note that AUDIT_ARCH doesn't follow closely the naming reported by 'uname -m': convert for i386 and ppc as needed. While at it, move inclusion of seccomp.h after util.h, the former is less generic (cosmetic/clang-tidy only). Older kernel headers might lack a definition for AUDIT_ARCH_PPC64LE: define that explicitly if it's not available. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Makefile: cppcheck target: Suppress unmatchedSuppression, pass CFLAGSStefano Brivio2021-10-211-3/+16
| | | | | | | | | | Some of those warnings don't trigger even on systems with very similar toolchains, suppress unmatchedSuppression warnings, they're basically useless. While at it, pass CFLAGS to cppcheck. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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