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2019-12-16samples/bpf: Add missing -lz to TPROGS_LDLIBSToke Høiland-Jørgensen
Since libbpf now links against zlib, this needs to be included in the linker invocation for the userspace programs in samples/bpf that link statically against libbpf. Fixes: 166750bc1dd2 ("libbpf: Support libbpf-provided extern variables") Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Tested-by: Björn Töpel <bjorn.topel@intel.com> Link: https://lore.kernel.org/bpf/20191216102405.353834-1-toke@redhat.com
2019-12-16samples/bpf: Reintroduce missed build targetsPrashant Bhole
Add xdp_redirect and per_socket_stats_example in build targets. They got removed from build targets in Makefile reorganization. Fixes: 1d97c6c2511f ("samples/bpf: Base target programs rules on Makefile.target") Signed-off-by: Prashant Bhole <prashantbhole.linux@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20191216071619.25479-1-prashantbhole.linux@gmail.com
2019-12-11samples: bpf: fix syscall_tp due to unused syscallDaniel T. Lee
Currently, open() is called from the user program and it calls the syscall 'sys_openat', not the 'sys_open'. This leads to an error of the program of user side, due to the fact that the counter maps are zero since no function such 'sys_open' is called. This commit adds the kernel bpf program which are attached to the tracepoint 'sys_enter_openat' and 'sys_enter_openat'. Fixes: 1da236b6be963 ("bpf: add a test case for syscalls/sys_{enter|exit}_* tracepoints") Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-12-11samples: bpf: Replace symbol compare of trace_eventDaniel T. Lee
Previously, when this sample is added, commit 1c47910ef8013 ("samples/bpf: add perf_event+bpf example"), a symbol 'sys_read' and 'sys_write' has been used without no prefixes. But currently there are no exact symbols with these under kallsyms and this leads to failure. This commit changes exact compare to substring compare to keep compatible with exact symbol or prefixed symbol. Fixes: 1c47910ef8013 ("samples/bpf: add perf_event+bpf example") Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20191205080114.19766-2-danieltimlee@gmail.com
2019-12-10samples: vfio-mdev: constify fb opsJani Nikula
Now that the fbops member of struct fb_info is const, we can start making the ops const as well. v2: fix typo (Christophe de Dinechin) Cc: Kirti Wankhede <kwankhede@nvidia.com> Cc: kvm@vger.kernel.org Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Acked-by: Kirti Wankhede <kwankhede@nvidia.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/ddb10df1316ef585930cda7718643a580f4fe37b.1575390741.git.jani.nikula@intel.com
2019-12-04samples/bpf: Fix broken xdp_rxq_info due to map order assumptionsJesper Dangaard Brouer
In the days of using bpf_load.c the order in which the 'maps' sections were defines in BPF side (*_kern.c) file, were used by userspace side to identify the map via using the map order as an index. In effect the order-index is created based on the order the maps sections are stored in the ELF-object file, by the LLVM compiler. This have also carried over in libbpf via API bpf_map__next(NULL, obj) to extract maps in the order libbpf parsed the ELF-object file. When BTF based maps were introduced a new section type ".maps" were created. I found that the LLVM compiler doesn't create the ".maps" sections in the order they are defined in the C-file. The order in the ELF file is based on the order the map pointer is referenced in the code. This combination of changes lead to xdp_rxq_info mixing up the map file-descriptors in userspace, resulting in very broken behaviour, but without warning the user. This patch fix issue by instead using bpf_object__find_map_by_name() to find maps via their names. (Note, this is the ELF name, which can be longer than the name the kernel retains). Fixes: be5bca44aa6b ("samples: bpf: convert some XDP samples from bpf_load to libbpf") Fixes: 451d1dc886b5 ("samples: bpf: update map definition to new syntax BTF-defined map") Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Toke Høiland-Jørgensen <toke@redhat.com> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/157529025128.29832.5953245340679936909.stgit@firesoul
2019-11-27Merge tag 'trace-v5.5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull tracing updates from Steven Rostedt: "New tracing features: - New PERMANENT flag to ftrace_ops when attaching a callback to a function. As /proc/sys/kernel/ftrace_enabled when set to zero will disable all attached callbacks in ftrace, this has a detrimental impact on live kernel tracing, as it disables all that it patched. If a ftrace_ops is registered to ftrace with the PERMANENT flag set, it will prevent ftrace_enabled from being disabled, and if ftrace_enabled is already disabled, it will prevent a ftrace_ops with PREMANENT flag set from being registered. - New register_ftrace_direct(). As eBPF would like to register its own trampolines to be called by the ftrace nop locations directly, without going through the ftrace trampoline, this function has been added. This allows for eBPF trampolines to live along side of ftrace, perf, kprobe and live patching. It also utilizes the ftrace enabled_functions file that keeps track of functions that have been modified in the kernel, to allow for security auditing. - Allow for kernel internal use of ftrace instances. Subsystems in the kernel can now create and destroy their own tracing instances which allows them to have their own tracing buffer, and be able to record events without worrying about other users from writing over their data. - New seq_buf_hex_dump() that lets users use the hex_dump() in their seq_buf usage. - Notifications now added to tracing_max_latency to allow user space to know when a new max latency is hit by one of the latency tracers. - Wider spread use of generic compare operations for use of bsearch and friends. - More synthetic event fields may be defined (32 up from 16) - Use of xarray for architectures with sparse system calls, for the system call trace events. This along with small clean ups and fixes" * tag 'trace-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (51 commits) tracing: Enable syscall optimization for MIPS tracing: Use xarray for syscall trace events tracing: Sample module to demonstrate kernel access to Ftrace instances. tracing: Adding new functions for kernel access to Ftrace instances tracing: Fix Kconfig indentation ring-buffer: Fix typos in function ring_buffer_producer ftrace: Use BIT() macro ftrace: Return ENOTSUPP when DYNAMIC_FTRACE_WITH_DIRECT_CALLS is not configured ftrace: Rename ftrace_graph_stub to ftrace_stub_graph ftrace: Add a helper function to modify_ftrace_direct() to allow arch optimization ftrace: Add helper find_direct_entry() to consolidate code ftrace: Add another check for match in register_ftrace_direct() ftrace: Fix accounting bug with direct->count in register_ftrace_direct() ftrace/selftests: Fix spelling mistake "wakeing" -> "waking" tracing: Increase SYNTH_FIELDS_MAX for synthetic_events ftrace/samples: Add a sample module that implements modify_ftrace_direct() ftrace: Add modify_ftrace_direct() tracing: Add missing "inline" in stub function of latency_fsnotify() tracing: Remove stray tab in TRACE_EVAL_MAP_FILE's help text tracing: Use seq_buf_hex_dump() to dump buffers ...
2019-11-27Merge tag 'char-misc-5.5-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc driver updates from Greg KH: "Here is the big set of char/misc and other driver patches for 5.5-rc1 Loads of different things in here, this feels like the catch-all of driver subsystems these days. Full details are in the shortlog, but nothing major overall, just lots of driver updates and additions. All of these have been in linux-next for a while with no reported issues" * tag 'char-misc-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (198 commits) char: Fix Kconfig indentation, continued habanalabs: add more protection of device during reset habanalabs: flush EQ workers in hard reset habanalabs: make the reset code more consistent habanalabs: expose reset counters via existing INFO IOCTL habanalabs: make code more concise habanalabs: use defines for F/W files habanalabs: remove prints on successful device initialization habanalabs: remove unnecessary checks habanalabs: invalidate MMU cache only once habanalabs: skip VA block list update in reset flow habanalabs: optimize MMU unmap habanalabs: prevent read/write from/to the device during hard reset habanalabs: split MMU properties to PCI/DRAM habanalabs: re-factor MMU masks and documentation habanalabs: type specific MMU cache invalidation habanalabs: re-factor memory module code habanalabs: export uapi defines to user-space habanalabs: don't print error when queues are full habanalabs: increase max jobs number to 512 ...
2019-11-25sample/vfio-mdev/mbocs: Remove dma_buf_k(un)map supportDaniel Vetter
No in-tree users left. Acked-by: Sumit Semwal <sumit.semwal@linaro.org> Acked-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Cc: Kirti Wankhede <kwankhede@nvidia.com> Cc: kvm@vger.kernel.org Link: https://patchwork.freedesktop.org/patch/msgid/20191118103536.17675-15-daniel.vetter@ffwll.ch
2019-11-22tracing: Sample module to demonstrate kernel access to Ftrace instances.Divya Indi
This is a sample module to demonstrate the use of the newly introduced and exported APIs to access Ftrace instances from within the kernel. Newly introduced APIs used here - 1. Create/Lookup a trace array with the given name. struct trace_array *trace_array_get_by_name(const char *name) 2. Destroy/Remove a trace array. int trace_array_destroy(struct trace_array *tr) 4. Enable/Disable trace events: int trace_array_set_clr_event(struct trace_array *tr, const char *system, const char *event, bool enable); Exported APIs - 1. trace_printk equivalent for instances. int trace_array_printk(struct trace_array *tr, unsigned long ip, const char *fmt, ...); 2. Helper function. void trace_printk_init_buffers(void); 3. To decrement the reference counter. void trace_array_put(struct trace_array *tr) Sample output(contents of /sys/kernel/tracing/instances/sample-instance) NOTE: Tracing disabled after ~5 sec) _-----=> irqs-off / _----=> need-resched | / _---=> hardirq/softirq || / _--=> preempt-depth ||| / delay TASK-PID CPU# |||| TIMESTAMP FUNCTION | | | |||| | | sample-instance-1452 [002] .... 49.430948: simple_thread: trace_array_printk: count=0 sample-instance-1452 [002] .... 49.430951: sample_event: count value=0 at jiffies=4294716608 sample-instance-1452 [002] .... 50.454847: simple_thread: trace_array_printk: count=1 sample-instance-1452 [002] .... 50.454849: sample_event: count value=1 at jiffies=4294717632 sample-instance-1452 [002] .... 51.478748: simple_thread: trace_array_printk: count=2 sample-instance-1452 [002] .... 51.478750: sample_event: count value=2 at jiffies=4294718656 sample-instance-1452 [002] .... 52.502652: simple_thread: trace_array_printk: count=3 sample-instance-1452 [002] .... 52.502655: sample_event: count value=3 at jiffies=4294719680 sample-instance-1452 [002] .... 53.526533: simple_thread: trace_array_printk: count=4 sample-instance-1452 [002] .... 53.526535: sample_event: count value=4 at jiffies=4294720704 sample-instance-1452 [002] .... 54.550438: simple_thread: trace_array_printk: count=5 sample-instance-1452 [002] .... 55.574336: simple_thread: trace_array_printk: count=6 Link: http://lkml.kernel.org/r/1574276919-11119-3-git-send-email-divya.indi@oracle.com Reviewed-by: Aruna Ramakrishna <aruna.ramakrishna@oracle.com> Signed-off-by: Divya Indi <divya.indi@oracle.com> [ Moved to samples/ftrace ] Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2019-11-20Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextDavid S. Miller
Daniel Borkmann says: ==================== pull-request: bpf-next 2019-11-20 The following pull-request contains BPF updates for your *net-next* tree. We've added 81 non-merge commits during the last 17 day(s) which contain a total of 120 files changed, 4958 insertions(+), 1081 deletions(-). There are 3 trivial conflicts, resolve it by always taking the chunk from 196e8ca74886c433: <<<<<<< HEAD ======= void *bpf_map_area_mmapable_alloc(u64 size, int numa_node); >>>>>>> 196e8ca74886c433dcfc64a809707074b936aaf5 <<<<<<< HEAD void *bpf_map_area_alloc(u64 size, int numa_node) ======= static void *__bpf_map_area_alloc(u64 size, int numa_node, bool mmapable) >>>>>>> 196e8ca74886c433dcfc64a809707074b936aaf5 <<<<<<< HEAD if (size <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) { ======= /* kmalloc()'ed memory can't be mmap()'ed */ if (!mmapable && size <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) { >>>>>>> 196e8ca74886c433dcfc64a809707074b936aaf5 The main changes are: 1) Addition of BPF trampoline which works as a bridge between kernel functions, BPF programs and other BPF programs along with two new use cases: i) fentry/fexit BPF programs for tracing with practically zero overhead to call into BPF (as opposed to k[ret]probes) and ii) attachment of the former to networking related programs to see input/output of networking programs (covering xdpdump use case), from Alexei Starovoitov. 2) BPF array map mmap support and use in libbpf for global data maps; also a big batch of libbpf improvements, among others, support for reading bitfields in a relocatable manner (via libbpf's CO-RE helper API), from Andrii Nakryiko. 3) Extend s390x JIT with usage of relative long jumps and loads in order to lift the current 64/512k size limits on JITed BPF programs there, from Ilya Leoshkevich. 4) Add BPF audit support and emit messages upon successful prog load and unload in order to have a timeline of events, from Daniel Borkmann and Jiri Olsa. 5) Extension to libbpf and xdpsock sample programs to demo the shared umem mode (XDP_SHARED_UMEM) as well as RX-only and TX-only sockets, from Magnus Karlsson. 6) Several follow-up bug fixes for libbpf's auto-pinning code and a new API call named bpf_get_link_xdp_info() for retrieving the full set of prog IDs attached to XDP, from Toke Høiland-Jørgensen. 7) Add BTF support for array of int, array of struct and multidimensional arrays and enable it for skb->cb[] access in kfree_skb test, from Martin KaFai Lau. 8) Fix AF_XDP by using the correct number of channels from ethtool, from Luigi Rizzo. 9) Two fixes for BPF selftest to get rid of a hang in test_tc_tunnel and to avoid xdping to be run as standalone, from Jiri Benc. 10) Various BPF selftest fixes when run with latest LLVM trunk, from Yonghong Song. 11) Fix a memory leak in BPF fentry test run data, from Colin Ian King. 12) Various smaller misc cleanups and improvements mostly all over BPF selftests and samples, from Daniel T. Lee, Andre Guedes, Anders Roxell, Mao Wenan, Yue Haibing. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-15samples/bpf: Add missing option to xdpsock usageAndre Guedes
Commit 743e568c1586 (samples/bpf: Add a "force" flag to XDP samples) introduced the '-F' option but missed adding it to the usage() and the 'long_option' array. Fixes: 743e568c1586 (samples/bpf: Add a "force" flag to XDP samples) Signed-off-by: Andre Guedes <andre.guedes@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20191114162847.221770-2-andre.guedes@intel.com
2019-11-15samples/bpf: Remove duplicate option from xdpsockAndre Guedes
The '-f' option is shown twice in the usage(). This patch removes the outdated version. Signed-off-by: Andre Guedes <andre.guedes@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20191114162847.221770-1-andre.guedes@intel.com
2019-11-15ftrace/selftests: Fix spelling mistake "wakeing" -> "waking"Colin Ian King
There is a spelling mistake in a trace_printk message. As well as in the selftests that search for this string. Link: http://lkml.kernel.org/r/20191115085938.38947-1-colin.king@canonical.com Link: http://lkml.kernel.org/r/20191115090356.39572-1-colin.king@canonical.com Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2019-11-14ftrace/samples: Add a sample module that implements modify_ftrace_direct()Steven Rostedt (VMware)
Add a sample module that tests modify_ftrace_direct(), and this can be used by the selftests as well. Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2019-11-13ftrace: Add another example of register_ftrace_direct() use caseSteven Rostedt (VMware)
Add another module sample that registers a direct trampoline to a function via register_ftrace_direct(). Having another module that does this allows to test the use case of multiple direct callers registered, as more than one direct caller goes into another path, and is needed to perform proper testing of the register_ftrace_direct() call. Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2019-11-13ftrace: Add sample module that uses register_ftrace_direct()Steven Rostedt (VMware)
Add a sample module that shows a simple use case for regsiter_ftrace_direct(), and how to use it. Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2019-11-11samples/bpf: adjust Makefile and README.rstJesper Dangaard Brouer
Side effect of some kbuild changes resulted in breaking the documented way to build samples/bpf/. This patch change the samples/bpf/Makefile to work again, when invoking make from the subdir samples/bpf/. Also update the documentation in README.rst, to reflect the new way to build. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-11Merge 5.4-rc7 into char-misc-nextGreg Kroah-Hartman
We need the char/misc driver fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-11-10samples/bpf: Use Rx-only and Tx-only sockets in xdpsockMagnus Karlsson
Use Rx-only sockets for the rxdrop sample and Tx-only sockets for the txpush sample in the xdpsock application. This so that we exercise and show case these socket types too. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Tested-by: William Tu <u9012063@gmail.com> Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com> Link: https://lore.kernel.org/bpf/1573148860-30254-5-git-send-email-magnus.karlsson@intel.com
2019-11-10samples/bpf: Add XDP_SHARED_UMEM support to xdpsockMagnus Karlsson
Add support for the XDP_SHARED_UMEM mode to the xdpsock sample application. As libbpf does not have a built in XDP program for this mode, we use an explicitly loaded XDP program. This also serves as an example on how to write your own XDP program that can route to an AF_XDP socket. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Tested-by: William Tu <u9012063@gmail.com> Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com> Link: https://lore.kernel.org/bpf/1573148860-30254-3-git-send-email-magnus.karlsson@intel.com
2019-11-09Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller
One conflict in the BPF samples Makefile, some fixes in 'net' whilst we were converting over to Makefile.target rules in 'net-next'. Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-08samples: bpf: update map definition to new syntax BTF-defined mapDaniel T. Lee
Since, the new syntax of BTF-defined map has been introduced, the syntax for using maps under samples directory are mixed up. For example, some are already using the new syntax, and some are using existing syntax by calling them as 'legacy'. As stated at commit abd29c931459 ("libbpf: allow specifying map definitions using BTF"), the BTF-defined map has more compatablility with extending supported map definition features. The commit doesn't replace all of the map to new BTF-defined map, because some of the samples still use bpf_load instead of libbpf, which can't properly create BTF-defined map. This will only updates the samples which uses libbpf API for loading bpf program. (ex. bpf_prog_load_xattr) Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Acked-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-11-08samples: bpf: Update outdated error messageDaniel T. Lee
Currently, under samples, several methods are being used to load bpf program. Since using libbpf is preferred solution, lots of previously used 'load_bpf_file' from bpf_load are replaced with 'bpf_prog_load_xattr' from libbpf. But some of the error messages still show up as 'load_bpf_file' instead of 'bpf_prog_load_xattr'. This commit fixes outdated errror messages under samples and fixes some code style issues. Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20191107005153.31541-2-danieltimlee@gmail.com
2019-11-02bpf, samples: Use bpf_probe_read_user where appropriateDaniel Borkmann
Use bpf_probe_read_user() helper instead of bpf_probe_read() for samples that attach to kprobes probing on user addresses. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/5b0144b3f8e031ec5e2438bd7de8d7877e63bf2f.1572649915.git.daniel@iogearbox.net
2019-10-31samples/bpf: fix build by setting HAVE_ATTR_TEST to zeroBjörn Töpel
To remove that test_attr__{enabled/open} are used by perf-sys.h, we set HAVE_ATTR_TEST to zero. Signed-off-by: Björn Töpel <bjorn.topel@intel.com> Tested-by: KP Singh <kpsingh@google.com> Acked-by: Song Liu <songliubraving@fb.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: bpf@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: http://lore.kernel.org/bpf/20191001113307.27796-3-bjorn.topel@gmail.com
2019-10-27Merge 5.4-rc5 into char-misc-nextGreg Kroah-Hartman
We want the binder fix in here as well for testing and to work on top of. Also handles a merge issue in binder.c to help linux-next out Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-21samples: mei: use hostprogs kbuild constructsTomas Winkler
Use hostprogs kbuild constructs to compile mei sample program mei-amt-version Add CONFIG_SAMPLE_INTEL_MEI option to enable/disable the feature. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20191010132710.4075-1-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-20Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller
Several cases of overlapping changes which were for the most part trivially resolvable. Signed-off-by: David S. Miller <davem@davemloft.net>
2019-10-14Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextDavid S. Miller
Alexei Starovoitov says: ==================== pull-request: bpf-next 2019-10-14 The following pull-request contains BPF updates for your *net-next* tree. 12 days of development and 85 files changed, 1889 insertions(+), 1020 deletions(-) The main changes are: 1) auto-generation of bpf_helper_defs.h, from Andrii. 2) split of bpf_helpers.h into bpf_{helpers, helper_defs, endian, tracing}.h and move into libbpf, from Andrii. 3) Track contents of read-only maps as scalars in the verifier, from Andrii. 4) small x86 JIT optimization, from Daniel. 5) cross compilation support, from Ivan. 6) bpf flow_dissector enhancements, from Jakub and Stanislav. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2019-10-12samples/bpf: Add preparation steps and sysroot info to readmeIvan Khoronzhuk
Add couple preparation steps: clean and configuration. Also add newly added sysroot support info to cross-compile section. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20191011002808.28206-16-ivan.khoronzhuk@linaro.org
2019-10-12samples/bpf: Add sysroot supportIvan Khoronzhuk
Basically it only enables that was added by previous couple fixes. Sysroot contains correct libs installed and its headers. Useful when working with NFC or virtual machine. Usage example: clean (on demand) make ARCH=arm -C samples/bpf clean make ARCH=arm -C tools clean make ARCH=arm clean configure and install headers: make ARCH=arm defconfig make ARCH=arm headers_install build samples/bpf: make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- samples/bpf/ \ SYSROOT="path/to/sysroot" Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20191011002808.28206-15-ivan.khoronzhuk@linaro.org
2019-10-12samples/bpf: Provide C/LDFLAGS to libbpfIvan Khoronzhuk
In order to build lib using C/LD flags of target arch, provide them to libbpf make. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20191011002808.28206-14-ivan.khoronzhuk@linaro.org
2019-10-12samples/bpf: Use target CC environment for HDR_PROBEIvan Khoronzhuk
No need in hacking HOSTCC to be cross-compiler any more, so drop this trick and use target CC for HDR_PROBE. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20191011002808.28206-11-ivan.khoronzhuk@linaro.org
2019-10-12samples/bpf: Use own flags but not HOSTCFLAGSIvan Khoronzhuk
While compiling natively, the host's cflags and ldflags are equal to ones used from HOSTCFLAGS and HOSTLDFLAGS. When cross compiling it should have own, used for target arch. While verification, for arm, arm64 and x86_64 the following flags were used always: -Wall -O2 -fomit-frame-pointer -Wmissing-prototypes -Wstrict-prototypes So, add them as they were verified and used before adding Makefile.target and lets omit "-fomit-frame-pointer" as were proposed while review, as no sense in such optimization for samples. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20191011002808.28206-10-ivan.khoronzhuk@linaro.org
2019-10-12samples/bpf: Base target programs rules on Makefile.targetIvan Khoronzhuk
The main reason for that - HOSTCC and CC have different aims. HOSTCC is used to build programs running on host, that can cross-comple target programs with CC. It was tested for arm and arm64 cross compilation, based on linaro toolchain, but should work for others. So, in order to split cross compilation (CC) with host build (HOSTCC), lets base samples on Makefile.target. It allows to cross-compile samples/bpf programs with CC while auxialry tools running on host built with HOSTCC. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20191011002808.28206-9-ivan.khoronzhuk@linaro.org
2019-10-12samples/bpf: Add makefile.target for separate CC target buildIvan Khoronzhuk
The Makefile.target is added only and will be used in sample/bpf/Makefile later in order to switch cross-compiling to CC from HOSTCC environment. The HOSTCC is supposed to build binaries and tools running on the host afterwards, in order to simplify build or so, like "fixdep" or else. In case of cross compiling "fixdep" is executed on host when the rest samples should run on target arch. In order to build binaries for target arch with CC and tools running on host with HOSTCC, lets add Makefile.target for simplicity, having definition and routines similar to ones, used in script/Makefile.host. This allows later add cross-compilation to samples/bpf with minimum changes. The tprog stands for target programs built with CC. Makefile.target contains only stuff needed for samples/bpf, potentially can be reused later and now needed only for unblocking tricky samples/bpf cross compilation. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20191011002808.28206-8-ivan.khoronzhuk@linaro.org
2019-10-12samples/bpf: Drop unnecessarily inclusion for bpf_loadIvan Khoronzhuk
Drop inclusion for bpf_load -I$(objtree)/usr/include as it is included for all objects anyway, with above line: KBUILD_HOSTCFLAGS += -I$(objtree)/usr/include Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20191011002808.28206-7-ivan.khoronzhuk@linaro.org
2019-10-12samples/bpf: Use __LINUX_ARM_ARCH__ selector for armIvan Khoronzhuk
For arm, -D__LINUX_ARM_ARCH__=X is min version used as instruction set selector and is absolutely required while parsing some parts of headers. It's present in KBUILD_CFLAGS but not in autoconf.h, so let's retrieve it from and add to programs cflags. In another case errors like "SMP is not supported" for armv7 and bunch of other errors are issued resulting to incorrect final object. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20191011002808.28206-6-ivan.khoronzhuk@linaro.org
2019-10-12samples/bpf: Use own EXTRA_CFLAGS for clang commandsIvan Khoronzhuk
It can overlap with CFLAGS used for libraries built with gcc if not now then in next patches. Correct it here for simplicity. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20191011002808.28206-5-ivan.khoronzhuk@linaro.org
2019-10-12samples/bpf: Use --target from cross-compileIvan Khoronzhuk
For cross compiling the target triple can be inherited from cross-compile prefix as it's done in CLANG_FLAGS from kernel makefile. So copy-paste this decision from kernel Makefile. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20191011002808.28206-4-ivan.khoronzhuk@linaro.org
2019-10-12samples/bpf: Fix cookie_uid_helper_example obj buildIvan Khoronzhuk
Don't list userspace "cookie_uid_helper_example" object in list for bpf objects. 'always' target is used for listing bpf programs, but 'cookie_uid_helper_example.o' is a user space ELF file, and covered by rule `per_socket_stats_example`, so shouldn't be in 'always'. Let us remove `always += cookie_uid_helper_example.o`, which avoids breaking cross compilation due to mismatched includes. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20191011002808.28206-3-ivan.khoronzhuk@linaro.org
2019-10-12samples/bpf: Fix HDR_PROBE "echo"Ivan Khoronzhuk
echo should be replaced with echo -e to handle '\n' correctly, but instead, replace it with printf as some systems can't handle echo -e. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20191011002808.28206-2-ivan.khoronzhuk@linaro.org
2019-10-08libbpf: Move bpf_{helpers, helper_defs, endian, tracing}.h into libbpfAndrii Nakryiko
Move bpf_helpers.h, bpf_tracing.h, and bpf_endian.h into libbpf. Move bpf_helper_defs.h generation into libbpf's Makefile. Ensure all those headers are installed along the other libbpf headers. Also, adjust selftests and samples include path to include libbpf now. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20191008175942.1769476-6-andriin@fb.com
2019-10-08selftests/bpf: Split off tracing-only helpers into bpf_tracing.hAndrii Nakryiko
Split-off PT_REGS-related helpers into bpf_tracing.h header. Adjust selftests and samples to include it where necessary. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20191008175942.1769476-5-andriin@fb.com
2019-10-08selftests/bpf: samples/bpf: Split off legacy stuff from bpf_helpers.hAndrii Nakryiko
Split off few legacy things from bpf_helpers.h into separate bpf_legacy.h file: - load_{byte|half|word}; - remove extra inner_idx and numa_node fields from bpf_map_def and introduce bpf_map_def_legacy for use in samples; - move BPF_ANNOTATE_KV_PAIR into bpf_legacy.h. Adjust samples and selftests accordingly by either including bpf_legacy.h and using bpf_map_def_legacy, or switching to BTF-defined maps altogether. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20191008175942.1769476-3-andriin@fb.com
2019-10-07samples: bpf: Add max_pckt_size option at xdp_adjust_tailDaniel T. Lee
Currently, at xdp_adjust_tail_kern.c, MAX_PCKT_SIZE is limited to 600. To make this size flexible, static global variable 'max_pcktsz' is added. By updating new packet size from the user space, xdp_adjust_tail_kern.o will use this value as a new max packet size. This static global variable can be accesible from .data section with bpf_object__find_map* from user space, since it is considered as internal map (accessible with .bss/.data/.rodata suffix). If no '-P <MAX_PCKT_SIZE>' option is used, the size of maximum packet will be 600 as a default. For clarity, change the helper to fetch map from 'bpf_map__next' to 'bpf_object__find_map_fd_by_name'. Also, changed the way to test prog_fd, map_fd from '!= 0' to '< 0', since fd could be 0 when stdin is closed. Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20191007172117.3916-1-danieltimlee@gmail.com
2019-10-07samples/bpf: Trivial - fix spelling mistake in usageAnton Ivanov
Fix spelling mistake. Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20191007082636.14686-1-anton.ivanov@cambridgegreys.com
2019-10-07samples: pktgen: allow to specify destination IP range (CIDR)Daniel T. Lee
Currently, kernel pktgen has the feature to specify destination address range for sending packet. (e.g. pgset "dst_min/dst_max") But on samples, each pktgen script doesn't have any option to achieve this. This commit adds the feature to specify the destination address range with CIDR. -d : ($DEST_IP) destination IP. CIDR (e.g. 198.18.0.0/15) is also allowed # ./pktgen_sample01_simple.sh -6 -d fe80::20/126 -p 3000 -n 4 # tcpdump ip6 and udp 05:14:18.082285 IP6 fe80::99.71 > fe80::23.3000: UDP, length 16 05:14:18.082564 IP6 fe80::99.43 > fe80::23.3000: UDP, length 16 05:14:18.083366 IP6 fe80::99.107 > fe80::22.3000: UDP, length 16 05:14:18.083585 IP6 fe80::99.97 > fe80::21.3000: UDP, length 16 Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-10-07samples: pktgen: add helper functions for IP(v4/v6) CIDR parsingDaniel T. Lee
This commit adds CIDR parsing and IP validate helper function to parse single IP or range of IP with CIDR. (e.g. 198.18.0.0/15) Validating the address should be preceded prior to the parsing. Helpers will be used in prior to set target address in samples/pktgen. Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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