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2017-05-11samples/bpf: run cleanup routines when receiving SIGTERMAndy Gospodarek
Shahid Habib noticed that when xdp1 was killed from a different console the xdp program was not cleaned-up properly in the kernel and it continued to forward traffic. Most of the applications in samples/bpf cleanup properly, but only when getting SIGINT. Since kill defaults to using SIGTERM, add support to cleanup when the application receives either SIGINT or SIGTERM. Signed-off-by: Andy Gospodarek <andy@greyhouse.net> Reported-by: Shahid Habib <shahid.habib@broadcom.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-05-11xdp: add flag to enforce driver modeDaniel Borkmann
After commit b5cdae3291f7 ("net: Generic XDP") we automatically fall back to a generic XDP variant if the driver does not support native XDP. Allow for an option where the user can specify that always the native XDP variant should be selected and in case it's not supported by a driver, just bail out. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-05-03samples/bpf: export map_data[] for more info on mapsJesper Dangaard Brouer
Giving *_user.c side tools access to map_data[] provides easier access to information on the maps being loaded. Still provide the guarantee that the order maps are being defined in inside the _kern.c file corresponds with the order in the array. Now user tools are not blind, but can inspect and verify the maps that got loaded from the ELF binary. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-05-03samples/bpf: load_bpf.c make callback fixup more flexibleJesper Dangaard Brouer
Do this change before others start to use this callback. Change map_perf_test_user.c which seems to be the only user. This patch extends capabilities of commit 9fd63d05f3e8 ("bpf: Allow bpf sample programs (*_user.c) to change bpf_map_def"). Give fixup callback access to struct bpf_map_data, instead of only stuct bpf_map_def. This add flexibility to allow userspace to reassign the map file descriptor. This is very useful when wanting to share maps between several bpf programs. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-05-03samples/bpf: make bpf_load.c code compatible with ELF maps section changesJesper Dangaard Brouer
This patch does proper parsing of the ELF "maps" section, in-order to be both backwards and forwards compatible with changes to the map definition struct bpf_map_def, which gets compiled into the ELF file. The assumption is that new features with value zero, means that they are not in-use. For backward compatibility where loading an ELF file with a smaller struct bpf_map_def, only copy objects ELF size, leaving rest of loaders struct zero. For forward compatibility where ELF file have a larger struct bpf_map_def, only copy loaders own struct size and verify that rest of the larger struct is zero, assuming this means the newer feature was not activated, thus it should be safe for this older loader to load this newer ELF file. Fixes: fb30d4b71214 ("bpf: Add tests for map-in-map") Fixes: 409526bea3c3 ("samples/bpf: bpf_load.c detect and abort if ELF maps section size is wrong") Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-05-03samples/bpf: adjust rlimit RLIMIT_MEMLOCK for traceex2, tracex3 and tracex4Jesper Dangaard Brouer
Needed to adjust max locked memory RLIMIT_MEMLOCK for testing these bpf samples as these are using more and larger maps than can fit in distro default 64Kbytes limit. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-05-02bpf, samples: fix build warning in cookie_uid_helper_exampleDaniel Borkmann
Fix the following warnings triggered by 51570a5ab2b7 ("A Sample of using socket cookie and uid for traffic monitoring"): In file included from /home/foo/net-next/samples/bpf/cookie_uid_helper_example.c:54:0: /home/foo/net-next/samples/bpf/cookie_uid_helper_example.c: In function 'prog_load': /home/foo/net-next/samples/bpf/cookie_uid_helper_example.c:119:27: warning: overflow in implicit constant conversion [-Woverflow] -32 + offsetof(struct stats, uid)), ^ /home/foo/net-next/samples/bpf/libbpf.h:135:12: note: in definition of macro 'BPF_STX_MEM' .off = OFF, \ ^ /home/foo/net-next/samples/bpf/cookie_uid_helper_example.c:121:27: warning: overflow in implicit constant conversion [-Woverflow] -32 + offsetof(struct stats, packets), 1), ^ /home/foo/net-next/samples/bpf/libbpf.h:155:12: note: in definition of macro 'BPF_ST_MEM' .off = OFF, \ ^ /home/foo/net-next/samples/bpf/cookie_uid_helper_example.c:129:27: warning: overflow in implicit constant conversion [-Woverflow] -32 + offsetof(struct stats, bytes)), ^ /home/foo/net-next/samples/bpf/libbpf.h:135:12: note: in definition of macro 'BPF_STX_MEM' .off = OFF, \ ^ HOSTLD /home/foo/net-next/samples/bpf/per_socket_stats_example Fixes: 51570a5ab2b7 ("A Sample of using socket cookie and uid for traffic monitoring") Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-05-01samples/bpf: fix XDP_FLAGS_SKB_MODE detach for xdp_tx_iptunnelJesper Dangaard Brouer
The xdp_tx_iptunnel program can be terminated in two ways, after N-seconds or via Ctrl-C SIGINT. The SIGINT code path does not handle detatching the correct XDP program, in-case the program was attached with XDP_FLAGS_SKB_MODE. Fix this by storing the XDP flags as a global variable, which is available for the SIGINT handler function. Fixes: 3993f2cb983b ("samples/bpf: Add support for SKB_MODE to xdp1 and xdp_tx_iptunnel") Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Andy Gospodarek <andy@greyhouse.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-05-01samples/bpf: fix SKB_MODE flag to be a 32-bit unsigned intJesper Dangaard Brouer
The kernel side of XDP_FLAGS_SKB_MODE is unsigned, and the rtnetlink IFLA_XDP_FLAGS is defined as NLA_U32. Thus, userspace programs under samples/bpf/ should use the correct type. Fixes: 3993f2cb983b ("samples/bpf: Add support for SKB_MODE to xdp1 and xdp_tx_iptunnel") Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Andy Gospodarek <andy@greyhouse.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-30samples/bpf: bpf_load.c detect and abort if ELF maps section size is wrongJesper Dangaard Brouer
The struct bpf_map_def was extended in commit fb30d4b71214 ("bpf: Add tests for map-in-map") with member unsigned int inner_map_idx. This changed the size of the maps section in the generated ELF _kern.o files. Unfortunately the loader in bpf_load.c does not detect or handle this. Thus, older _kern.o files became incompatible, and caused hard-to-debug errors where the syscall validation rejected BPF_MAP_CREATE request. This patch only detect the situation and aborts load_bpf_file(). It also add code comments warning people that read this loader for inspiration for these pitfalls. Fixes: fb30d4b71214 ("bpf: Add tests for map-in-map") Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-27samples/bpf: Add support for SKB_MODE to xdp1 and xdp_tx_iptunnelDavid Ahern
Add option to xdp1 and xdp_tx_iptunnel to insert xdp program in SKB_MODE: - update set_link_xdp_fd to take a flags argument that is added to the RTM_SETLINK message - Add -S option to xdp1 and xdp_tx_iptunnel user code. When passed in XDP_FLAGS_SKB_MODE is set in the flags arg passed to set_link_xdp_fd Signed-off-by: David Ahern <dsa@cumulusnetworks.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-24samples/bpf: check before defining offsetofAlexander Alemayhu
Fixes the following warning samples/bpf/test_lru_dist.c:28:0: warning: "offsetof" redefined #define offsetof(TYPE, MEMBER) ((size_t)&((TYPE *)0)->MEMBER) In file included from ./tools/lib/bpf/bpf.h:25:0, from samples/bpf/libbpf.h:5, from samples/bpf/test_lru_dist.c:24: /usr/lib/gcc/x86_64-redhat-linux/6.3.1/include/stddef.h:417:0: note: this is the location of the previous definition #define offsetof(TYPE, MEMBER) __builtin_offsetof (TYPE, MEMBER) Signed-off-by: Alexander Alemayhu <alexander@alemayhu.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-24samples/bpf: add static to function with no prototypeAlexander Alemayhu
Fixes the following warning samples/bpf/cookie_uid_helper_example.c: At top level: samples/bpf/cookie_uid_helper_example.c:276:6: warning: no previous prototype for ‘finish’ [-Wmissing-prototypes] void finish(int ret) ^~~~~~ HOSTLD samples/bpf/per_socket_stats_example Signed-off-by: Alexander Alemayhu <alexander@alemayhu.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-24samples/bpf: add -Wno-unknown-warning-option to clangAlexander Alemayhu
I was initially going to remove '-Wno-address-of-packed-member' because I thought it was not supposed to be there but Daniel suggested using '-Wno-unknown-warning-option'. This silences several warnings similiar to the one below warning: unknown warning option '-Wno-address-of-packed-member' [-Wunknown-warning-option] 1 warning generated. clang -nostdinc -isystem /usr/lib/gcc/x86_64-redhat-linux/6.3.1/include -I./arch/x86/include -I./arch/x86/include/generated/uapi -I./arch/x86/include/generated -I./include -I./arch/x86/include/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h \ -D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \ -Wno-compare-distinct-pointer-types \ -Wno-gnu-variable-sized-type-not-at-end \ -Wno-address-of-packed-member -Wno-tautological-compare \ -O2 -emit-llvm -c samples/bpf/xdp_tx_iptunnel_kern.c -o -| llc -march=bpf -filetype=obj -o samples/bpf/xdp_tx_iptunnel_kern.o $ clang --version clang version 3.9.1 (tags/RELEASE_391/final) Target: x86_64-unknown-linux-gnu Thread model: posix InstalledDir: /usr/bin Signed-off-by: Alexander Alemayhu <alexander@alemayhu.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-22bpf: Add sparc support to tools and samples.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Daniel Borkmann <daniel@iogearbox.net>
2017-04-17bpf: lru: Add map-in-map LRU exampleMartin KaFai Lau
This patch adds a map-in-map LRU example. If we know only a subset of cores will use the LRU, we can allocate a common LRU list per targeting core and store it into an array-of-hashs. It allows using the common LRU map with map-update performance comparable to the BPF_F_NO_COMMON_LRU map but without wasting memory on the unused cores that we know they will never access the LRU map. BPF_F_NO_COMMON_LRU: > map_perf_test 32 8 10000000 10000000 | awk '{sum += $3}END{print sum}' 9234314 (9.23M/s) map-in-map LRU: > map_perf_test 512 8 1260000 80000000 | awk '{sum += $3}END{print sum}' 9962743 (9.96M/s) Notes that the max_entries for the map-in-map LRU test is 1260000 which is the max_entries for each inner LRU map. 8 processes have been started, so 8 * 1260000 = 10080000 (~10M) which is close to what is used in the BPF_F_NO_COMMON_LRU test. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-17bpf: Allow bpf sample programs (*_user.c) to change bpf_map_defMartin KaFai Lau
The current bpf_map_def is statically defined during compile time. This patch allows the *_user.c program to change it during runtime. It is done by adding load_bpf_file_fixup_map() which takes a callback. The callback will be called before creating each map so that it has a chance to modify the bpf_map_def. The current usecase is to change max_entries in map_perf_test. It is interesting to test with a much bigger map size in some cases (e.g. the following patch on bpf_lru_map.c). However, it is hard to find one size to fit all testing environment. Hence, it is handy to take the max_entries as a cmdline arg and then configure the bpf_map_def during runtime. This patch adds two cmdline args. One is to configure the map's max_entries. Another is to configure the max_cnt which controls how many times a syscall is called. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-17bpf: lru: Refactor LRU map tests in map_perf_testMartin KaFai Lau
One more LRU test will be added later in this patch series. In this patch, we first move all existing LRU map tests into a single syscall (connect) first so that the future new LRU test can be added without hunting another syscall. One of the map name is also changed from percpu_lru_hash_map to nocommon_lru_hash_map to avoid the confusion with percpu_hash_map. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-08Sample program using SO_COOKIEChenbo Feng
Added a per socket traffic monitoring option to illustrate the usage of new getsockopt SO_COOKIE. The program is based on the socket traffic monitoring program using xt_eBPF and in the new option the data entry can be directly accessed using socket cookie. The cookie retrieved allow us to lookup an element in the eBPF for a specific socket. Signed-off-by: Chenbo Feng <fengc@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-03-23A Sample of using socket cookie and uid for traffic monitoringChenbo Feng
Add a sample program to demostrate the possible usage of get_socket_cookie and get_socket_uid helper function. The program will store bytes and packets counting of in/out traffic monitored by iptables and store the stats in a bpf map in per socket base. The owner uid of the socket will be stored as part of the data entry. A shell script for running the program is also included. Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Chenbo Feng <fengc@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-03-22bpf: Add tests for map-in-mapMartin KaFai Lau
Test cases for array of maps and hash of maps. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-03-16samples/bpf: add map_lookup microbenchmarkAlexei Starovoitov
$ map_perf_test 128 speed of HASH bpf_map_lookup_elem() in lookups per second w/o JIT w/JIT before 46M 58M after 42M 74M perf report before: 54.23% map_perf_test [kernel.kallsyms] [k] __htab_map_lookup_elem 14.24% map_perf_test [kernel.kallsyms] [k] lookup_elem_raw 8.84% map_perf_test [kernel.kallsyms] [k] htab_map_lookup_elem 5.93% map_perf_test [kernel.kallsyms] [k] bpf_map_lookup_elem 2.30% map_perf_test [kernel.kallsyms] [k] bpf_prog_da4fc6a3f41761a2 1.49% map_perf_test [kernel.kallsyms] [k] kprobe_ftrace_handler after: 60.03% map_perf_test [kernel.kallsyms] [k] __htab_map_lookup_elem 18.07% map_perf_test [kernel.kallsyms] [k] lookup_elem_raw 2.91% map_perf_test [kernel.kallsyms] [k] bpf_prog_da4fc6a3f41761a2 1.94% map_perf_test [kernel.kallsyms] [k] _einittext 1.90% map_perf_test [kernel.kallsyms] [k] __audit_syscall_exit 1.72% map_perf_test [kernel.kallsyms] [k] kprobe_ftrace_handler Notice that bpf_map_lookup_elem() and htab_map_lookup_elem() are trivial functions, yet they take sizeable amount of cpu time. htab_map_gen_lookup() removes bpf_map_lookup_elem() and converts htab_map_lookup_elem() into three BPF insns which causing cpu time for bpf_prog_da4fc6a3f41761a2() slightly increase. $ map_perf_test 256 speed of ARRAY bpf_map_lookup_elem() in lookups per second w/o JIT w/JIT before 97M 174M after 64M 280M before: 37.33% map_perf_test [kernel.kallsyms] [k] array_map_lookup_elem 13.95% map_perf_test [kernel.kallsyms] [k] bpf_map_lookup_elem 6.54% map_perf_test [kernel.kallsyms] [k] bpf_prog_da4fc6a3f41761a2 4.57% map_perf_test [kernel.kallsyms] [k] kprobe_ftrace_handler after: 32.86% map_perf_test [kernel.kallsyms] [k] bpf_prog_da4fc6a3f41761a2 6.54% map_perf_test [kernel.kallsyms] [k] kprobe_ftrace_handler array_map_gen_lookup() removes calls to array_map_lookup_elem() and bpf_map_lookup_elem() and replaces them with 7 bpf insns. The performance without JIT is slower, since executing extra insns in the interpreter is slower than running native C code, but with JIT the performance gains are obvious, since native C->x86 code is replaced with fewer bpf->x86 instructions. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-22Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds
Pull networking updates from David Miller: "Highlights: 1) Support TX_RING in AF_PACKET TPACKET_V3 mode, from Sowmini Varadhan. 2) Simplify classifier state on sk_buff in order to shrink it a bit. From Willem de Bruijn. 3) Introduce SIPHASH and it's usage for secure sequence numbers and syncookies. From Jason A. Donenfeld. 4) Reduce CPU usage for ICMP replies we are going to limit or suppress, from Jesper Dangaard Brouer. 5) Introduce Shared Memory Communications socket layer, from Ursula Braun. 6) Add RACK loss detection and allow it to actually trigger fast recovery instead of just assisting after other algorithms have triggered it. From Yuchung Cheng. 7) Add xmit_more and BQL support to mvneta driver, from Simon Guinot. 8) skb_cow_data avoidance in esp4 and esp6, from Steffen Klassert. 9) Export MPLS packet stats via netlink, from Robert Shearman. 10) Significantly improve inet port bind conflict handling, especially when an application is restarted and changes it's setting of reuseport. From Josef Bacik. 11) Implement TX batching in vhost_net, from Jason Wang. 12) Extend the dummy device so that VF (virtual function) features, such as configuration, can be more easily tested. From Phil Sutter. 13) Avoid two atomic ops per page on x86 in bnx2x driver, from Eric Dumazet. 14) Add new bpf MAP, implementing a longest prefix match trie. From Daniel Mack. 15) Packet sample offloading support in mlxsw driver, from Yotam Gigi. 16) Add new aquantia driver, from David VomLehn. 17) Add bpf tracepoints, from Daniel Borkmann. 18) Add support for port mirroring to b53 and bcm_sf2 drivers, from Florian Fainelli. 19) Remove custom busy polling in many drivers, it is done in the core networking since 4.5 times. From Eric Dumazet. 20) Support XDP adjust_head in virtio_net, from John Fastabend. 21) Fix several major holes in neighbour entry confirmation, from Julian Anastasov. 22) Add XDP support to bnxt_en driver, from Michael Chan. 23) VXLAN offloads for enic driver, from Govindarajulu Varadarajan. 24) Add IPVTAP driver (IP-VLAN based tap driver) from Sainath Grandhi. 25) Support GRO in IPSEC protocols, from Steffen Klassert" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1764 commits) Revert "ath10k: Search SMBIOS for OEM board file extension" net: socket: fix recvmmsg not returning error from sock_error bnxt_en: use eth_hw_addr_random() bpf: fix unlocking of jited image when module ronx not set arch: add ARCH_HAS_SET_MEMORY config net: napi_watchdog() can use napi_schedule_irqoff() tcp: Revert "tcp: tcp_probe: use spin_lock_bh()" net/hsr: use eth_hw_addr_random() net: mvpp2: enable building on 64-bit platforms net: mvpp2: switch to build_skb() in the RX path net: mvpp2: simplify MVPP2_PRS_RI_* definitions net: mvpp2: fix indentation of MVPP2_EXT_GLOBAL_CTRL_DEFAULT net: mvpp2: remove unused register definitions net: mvpp2: simplify mvpp2_bm_bufs_add() net: mvpp2: drop useless fields in mvpp2_bm_pool and related code net: mvpp2: remove unused 'tx_skb' field of 'struct mvpp2_tx_queue' net: mvpp2: release reference to txq_cpu[] entry after unmapping net: mvpp2: handle too large value in mvpp2_rx_time_coal_set() net: mvpp2: handle too large value handling in mvpp2_rx_pkts_coal_set() net: mvpp2: remove useless arguments in mvpp2_rx_{pkts, time}_coal_set ...
2017-02-20Merge branch 'perf-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf updates from Ingo Molnar: "On the kernel side the main changes in this cycle were: - Add Intel Kaby Lake CPU support (Srinivas Pandruvada) - AMD uncore driver updates for fam17 (Janakarajan Natarajan) - Intel/PT updates and core events optimizations and cleanups (Alexander Shishkin) - cgroups events fixes (David Carrillo-Cisneros) - kprobes improvements (Masami Hiramatsu) - ... plus misc fixes and updates. On the tooling side the main changes were: - Support clang build in tools/{perf,lib/{bpf,traceevent,api}} with CC=clang, to, for instance, take advantage of better warnings (Arnaldo Carvalho de Melo): - Introduce the 'delta-abs' 'perf diff' compute method, that orders the histogram entries by the absolute value of the percentage delta for a function in two perf.data files, i.e. the functions that changed the most (increase or decrease in samples) comes first (Namhyung Kim) - Add support for parsing Intel uncore vendor event files and add uncore vendor events for the Intel server processors (Haswell, Broadwell, IvyBridge), Xeon Phi (Knights Landing) and Broadwell DE (Andi Kleen) - Introduce 'perf ftrace' a perf front end to the kernel's ftrace function and function_graph tracer, defaulting to the "function_graph" tracer, more work will be done in reviving this effort, forward porting it from its initial patch submission (Namhyung Kim) - Add 'e' and 'c' hotkeys to expand/collapse call chains for a single hist entry in the 'perf report' and 'perf top' TUI (Jiri Olsa) - Account thread wait time (off CPU time) separately: sleep, iowait and preempt, based on the prev_state of the last event, show the breakdown when using "perf sched timehist --state" (Namhyumg Kim) - Add more triggers to switch the output file (perf.data.TIMESTAMP). Now, in addition to switching to a different output file when receiving a SIGUSR2, one can also specify file size and time based triggers: perf record -a --switch-output=signal is equivalent to what we had before: perf record -a --switch-output While we can also ask for the file to be "sliced" by size, taking into account that that will happen only when we get woken up by the kernel, i.e. one has to take into account the --mmap-pages (the size of the perf mmap ring buffer): perf record -a --switch-output=2G will break the perf.data output into multiple files limited to 2GB of samples, right when generating the output. For time based samples, alert() will be used, so to have 1 minute limited perf.data output files: perf record -a --switch-output=1m (Jiri Olsa) - Improve 'perf trace' (Arnaldo Carvalho de Melo) - 'perf kallsyms' toy tool to look for extended symbol information on the running kernel and demonstrate the machine/thread/symbol APIs for use in other tools, such as 'perf probe' (Arnaldo Carvalho de Melo) - ... plus tons of other changes, see the shortlog and Git log for details" * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (131 commits) perf tools: Add missing parse_events_error() prototype perf pmu: Fix check for unset alias->unit array perf tools: Be consistent on the type of map->symbols[] interator perf intel pt decoder: clang has no -Wno-override-init perf evsel: Do not put a variable sized type not at the end of a struct perf probe: Avoid accessing uninitialized 'map' variable perf tools: Do not put a variable sized type not at the end of a struct perf record: Do not put a variable sized type not at the end of a struct perf tests: Synthesize struct instead of using field after variable sized type perf bench numa: Make sure dprintf() is not defined Revert "perf bench futex: Sanitize numeric parameters" tools lib subcmd: Make it an error to pass a signed value to OPTION_UINTEGER tools: Set the maximum optimization level according to the compiler being used tools: Suppress request for warning options not existent in clang samples/bpf: Reset global variables samples/bpf: Ignore already processed ELF sections samples/bpf: Add missing header perf symbols: dso->name is an array, no need to check it against NULL perf tests record: No need to test an array against NULL perf symbols: No need to check if sym->name is NULL ...
2017-02-16Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
2017-02-13samples/bpf: Reset global variablesMickaël Salaün
Before loading a new ELF, clean previous kernel version, license and processed sections. Signed-off-by: Mickaël Salaün <mic@digikod.net> Acked-by: Joe Stringer <joe@ovn.org> Acked-by: Wang Nan <wangnan0@huawei.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: David S. Miller <davem@davemloft.net> Cc: netdev@vger.kernel.org Link: http://lkml.kernel.org/r/20170208202744.16274-3-mic@digikod.net Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-02-13samples/bpf: Ignore already processed ELF sectionsMickaël Salaün
Add a missing check for the map fixup loop. Signed-off-by: Mickaël Salaün <mic@digikod.net> Acked-by: Joe Stringer <joe@ovn.org> Acked-by: Wang Nan <wangnan0@huawei.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: David S. Miller <davem@davemloft.net> Cc: netdev@vger.kernel.org Link: http://lkml.kernel.org/r/20170208202744.16274-2-mic@digikod.net Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-02-13samples/bpf: Add missing headerMickaël Salaün
Include unistd.h to define __NR_getuid and __NR_getsid. Signed-off-by: Mickaël Salaün <mic@digikod.net> Acked-by: Joe Stringer <joe@ovn.org> Acked-by: Wang Nan <wangnan0@huawei.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: David S. Miller <davem@davemloft.net> Cc: netdev@vger.kernel.org Link: http://lkml.kernel.org/r/20170208202744.16274-4-mic@digikod.net Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-02-12bpf: introduce BPF_F_ALLOW_OVERRIDE flagAlexei Starovoitov
If BPF_F_ALLOW_OVERRIDE flag is used in BPF_PROG_ATTACH command to the given cgroup the descendent cgroup will be able to override effective bpf program that was inherited from this cgroup. By default it's not passed, therefore override is disallowed. Examples: 1. prog X attached to /A with default prog Y fails to attach to /A/B and /A/B/C Everything under /A runs prog X 2. prog X attached to /A with allow_override. prog Y fails to attach to /A/B with default (non-override) prog M attached to /A/B with allow_override. Everything under /A/B runs prog M only. 3. prog X attached to /A with allow_override. prog Y fails to attach to /A with default. The user has to detach first to switch the mode. In the future this behavior may be extended with a chain of non-overridable programs. Also fix the bug where detach from cgroup where nothing is attached was not throwing error. Return ENOENT in such case. Add several testcases and adjust libbpf. Fixes: 3007098494be ("cgroup: add support for eBPF programs") Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Tejun Heo <tj@kernel.org> Acked-by: Daniel Mack <daniel@zonque.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-28Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
Two trivial overlapping changes conflicts in MPLS and mlx5. Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-23samples/bpf: add lpm-trie benchmarkDavid Herrmann
Extend the map_perf_test_{user,kern}.c infrastructure to stress test lpm-trie lookups. We hook into the kprobe on sys_gettid() and measure the latency depending on trie size and lookup count. On my Intel Haswell i7-6400U, a single gettid() syscall with an empty bpf program takes roughly 6.5us on my system. Lookups in empty tries take ~1.8us on first try, ~0.9us on retries. Lookups in tries with 8192 entries take ~7.1us (on the first _and_ any subsequent try). Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Reviewed-by: Daniel Mack <daniel@zonque.org> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-20bpf: fix samples xdp_tx_iptunnel and tc_l2_redirect with fake KBUILD_MODNAMEJesper Dangaard Brouer
Fix build errors for samples/bpf xdp_tx_iptunnel and tc_l2_redirect, when dynamic debugging is enabled (CONFIG_DYNAMIC_DEBUG) by defining a fake KBUILD_MODNAME. Just like Daniel Borkmann fixed other samples/bpf in commit 96a8eb1eeed2 ("bpf: fix samples to add fake KBUILD_MODNAME"). Fixes: 12d8bb64e3f6 ("bpf: xdp: Add XDP example for head adjustment") Fixes: 90e02896f1a4 ("bpf: Add test for bpf_redirect to ipip/ip6tnl") Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-05Merge tag 'perf-urgent-for-mingo-4.10-20170104' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent Pull perf/urgent fixes and one improvement from Arnaldo Carvalho de Melo: Fixes: - Fix prev/next_prio formatting for deadline tasks in libtraceevent (Daniel Bristot de Oliveira) - Robustify reading of build-ids from /sys/kernel/note (Arnaldo Carvalho de Melo) - Fix building some sample/bpf in Alpine Linux 3.4 (Arnaldo Carvalho de Melo) - Fix 'make install-bin' to install libtraceevent plugins (Arnaldo Carvalho de Melo) - Fix 'perf record --switch-output' documentation and comment (Jiri Olsa) - Fix 'perf probe' for cross arch probing (Masami Hiramatsu) Improvement: - Show total scheduling time in 'perf sched timehist' (Namhyumg Kim) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-28samples/bpf trace_output_user: Remove duplicate sys/ioctl.h includeArnaldo Carvalho de Melo
Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Joe Stringer <joe@ovn.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-3awp0nv8tpnblatojmwjww7z@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-27samples/bpf sock_example: Avoid getting ethhdr from two includesArnaldo Carvalho de Melo
To avoid the following build failure on Alpine Linux 3.4, that has clang-3.8 with the bpf target: HOSTCC samples/bpf/sock_example.o In file included from /usr/include/net/ethernet.h:10:0, from /git/linux/samples/bpf/sock_example.h:7, from /git/linux/samples/bpf/sock_example.c:30: /usr/include/netinet/if_ether.h:96:8: error: redefinition of 'struct ethhdr' struct ethhdr { ^ In file included from /git/linux/samples/bpf/sock_example.c:26:0: ./usr/include/linux/if_ether.h:144:8: note: originally defined here struct ethhdr { ^ scripts/Makefile.host:124: recipe for target 'samples/bpf/sock_example.o' failed make[2]: *** [samples/bpf/sock_example.o] Error 1 /git/linux/Makefile:1658: recipe for target 'samples/bpf/' failed So include net/if_ether.h for the needs of sock_example.h, using the same include that sock_example.c uses. Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Joe Stringer <joe@ovn.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-m9avekl1b651qe1r1zd5tzz9@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-23Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Ingo Molnar: "On the kernel side there's two x86 PMU driver fixes and a uprobes fix, plus on the tooling side there's a number of fixes and some late updates" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits) perf sched timehist: Fix invalid period calculation perf sched timehist: Remove hardcoded 'comm_width' check at print_summary perf sched timehist: Enlarge default 'comm_width' perf sched timehist: Honour 'comm_width' when aligning the headers perf/x86: Fix overlap counter scheduling bug perf/x86/pebs: Fix handling of PEBS buffer overflows samples/bpf: Move open_raw_sock to separate header samples/bpf: Remove perf_event_open() declaration samples/bpf: Be consistent with bpf_load_program bpf_insn parameter tools lib bpf: Add bpf_prog_{attach,detach} samples/bpf: Switch over to libbpf perf diff: Do not overwrite valid build id perf annotate: Don't throw error for zero length symbols perf bench futex: Fix lock-pi help string perf trace: Check if MAP_32BIT is defined (again) samples/bpf: Make perf_event_read() static uprobes: Fix uprobes on MIPS, allow for a cache flush after ixol breakpoint creation samples/bpf: Make samples more libbpf-centric tools lib bpf: Add flags to bpf_create_map() tools lib bpf: use __u32 from linux/types.h ...
2016-12-20samples/bpf: Move open_raw_sock to separate headerJoe Stringer
This function was declared in libbpf.c and was the only remaining function in this library, but has nothing to do with BPF. Shift it out into a new header, sock_example.h, and include it from the relevant samples. Signed-off-by: Joe Stringer <joe@ovn.org> Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/20161209024620.31660-8-joe@ovn.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-20samples/bpf: Remove perf_event_open() declarationJoe Stringer
This declaration was made in samples/bpf/libbpf.c for convenience, but there's already one in tools/perf/perf-sys.h. Reuse that one. Committer notes: Testing it: $ make -j4 O=../build/v4.9.0-rc8+ samples/bpf/ make[1]: Entering directory '/home/build/v4.9.0-rc8+' CHK include/config/kernel.release GEN ./Makefile CHK include/generated/uapi/linux/version.h Using /home/acme/git/linux as source for kernel CHK include/generated/utsrelease.h CHK include/generated/timeconst.h CHK include/generated/bounds.h CHK include/generated/asm-offsets.h CALL /home/acme/git/linux/scripts/checksyscalls.sh HOSTCC samples/bpf/test_verifier.o HOSTCC samples/bpf/libbpf.o HOSTCC samples/bpf/../../tools/lib/bpf/bpf.o HOSTCC samples/bpf/test_maps.o HOSTCC samples/bpf/sock_example.o HOSTCC samples/bpf/bpf_load.o <SNIP> HOSTLD samples/bpf/trace_event HOSTLD samples/bpf/sampleip HOSTLD samples/bpf/tc_l2_redirect make[1]: Leaving directory '/home/build/v4.9.0-rc8+' $ Also tested the offwaketime resulting from the rebuild, seems to work as before. Signed-off-by: Joe Stringer <joe@ovn.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/20161209024620.31660-7-joe@ovn.org [ Use -I$(srctree)/tools/lib/ to support out of source code tree builds ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-20samples/bpf: Be consistent with bpf_load_program bpf_insn parameterArnaldo Carvalho de Melo
Only one of the examples declare the bpf_insn bpf proggie as a const: $ grep 'struct bpf_insn [a-z]' samples/bpf/*.c samples/bpf/fds_example.c: static const struct bpf_insn insns[] = { samples/bpf/sock_example.c: struct bpf_insn prog[] = { samples/bpf/test_cgrp2_attach2.c: struct bpf_insn prog[] = { samples/bpf/test_cgrp2_attach.c: struct bpf_insn prog[] = { samples/bpf/test_cgrp2_sock.c: struct bpf_insn prog[] = { $ Which causes this warning: [root@f5065a7d6272 linux]# make -j4 O=/tmp/build/linux samples/bpf/ <SNIP> HOSTCC samples/bpf/fds_example.o /git/linux/samples/bpf/fds_example.c: In function 'bpf_prog_create': /git/linux/samples/bpf/fds_example.c:63:6: warning: passing argument 2 of 'bpf_load_program' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] insns, insns_cnt, "GPL", 0, ^~~~~ In file included from /git/linux/samples/bpf/libbpf.h:5:0, from /git/linux/samples/bpf/bpf_load.h:4, from /git/linux/samples/bpf/fds_example.c:15: /git/linux/tools/lib/bpf/bpf.h:31:5: note: expected 'struct bpf_insn *' but argument is of type 'const struct bpf_insn *' int bpf_load_program(enum bpf_prog_type type, struct bpf_insn *insns, ^~~~~~~~~~~~~~~~ HOSTCC samples/bpf/sockex1_user.o So just ditch that 'const' to reduce build noise, leaving changing the bpf_load_program() bpf_insn parameter to const to a later patch, if deemed adequate. Cc: Joe Stringer <joe@ovn.org> Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-1z5xee8n3oa66jf62bpv16ed@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-20tools lib bpf: Add bpf_prog_{attach,detach}Joe Stringer
Commit d8c5b17f2bc0 ("samples: bpf: add userspace example for attaching eBPF programs to cgroups") added these functions to samples/libbpf, but during this merge all of the samples libbpf functionality is shifting to tools/lib/bpf. Shift these functions there. Committer notes: Use bzero + attr.FIELD = value instead of 'attr = { .FIELD = value, just like the other wrapper calls to sys_bpf with bpf_attr to make this build in older toolchais, such as the ones in CentOS 5 and 6. Signed-off-by: Joe Stringer <joe@ovn.org> Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-au2zvtsh55vqeo3v3uw7jr4c@git.kernel.org Link: https://github.com/joestringer/linux/commit/353e6f298c3d0a92fa8bfa61ff898c5050261a12.patch Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-20samples/bpf: Switch over to libbpfJoe Stringer
Now that libbpf under tools/lib/bpf/* is synced with the version from samples/bpf, we can get rid most of the libbpf library here. Committer notes: Built it in a docker fedora rawhide container and ran it in the f25 host, seems to work just like it did before this patch, i.e. the switch to tools/lib/bpf/ doesn't seem to have introduced problems and Joe said he tested it with all the entries in samples/bpf/ and other code he found: [root@f5065a7d6272 linux]# make -j4 O=/tmp/build/linux headers_install <SNIP> [root@f5065a7d6272 linux]# rm -rf /tmp/build/linux/samples/bpf/ [root@f5065a7d6272 linux]# make -j4 O=/tmp/build/linux samples/bpf/ make[1]: Entering directory '/tmp/build/linux' CHK include/config/kernel.release HOSTCC scripts/basic/fixdep GEN ./Makefile CHK include/generated/uapi/linux/version.h Using /git/linux as source for kernel CHK include/generated/utsrelease.h HOSTCC scripts/basic/bin2c HOSTCC arch/x86/tools/relocs_32.o HOSTCC arch/x86/tools/relocs_64.o LD samples/bpf/built-in.o <SNIP> HOSTCC samples/bpf/fds_example.o HOSTCC samples/bpf/sockex1_user.o /git/linux/samples/bpf/fds_example.c: In function 'bpf_prog_create': /git/linux/samples/bpf/fds_example.c:63:6: warning: passing argument 2 of 'bpf_load_program' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] insns, insns_cnt, "GPL", 0, ^~~~~ In file included from /git/linux/samples/bpf/libbpf.h:5:0, from /git/linux/samples/bpf/bpf_load.h:4, from /git/linux/samples/bpf/fds_example.c:15: /git/linux/tools/lib/bpf/bpf.h:31:5: note: expected 'struct bpf_insn *' but argument is of type 'const struct bpf_insn *' int bpf_load_program(enum bpf_prog_type type, struct bpf_insn *insns, ^~~~~~~~~~~~~~~~ HOSTCC samples/bpf/sockex2_user.o <SNIP> HOSTCC samples/bpf/xdp_tx_iptunnel_user.o clang -nostdinc -isystem /usr/lib/gcc/x86_64-redhat-linux/6.2.1/include -I/git/linux/arch/x86/include -I./arch/x86/include/generated/uapi -I./arch/x86/include/generated -I/git/linux/include -I./include -I/git/linux/arch/x86/include/uapi -I/git/linux/include/uapi -I./include/generated/uapi -include /git/linux/include/linux/kconfig.h \ -D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \ -Wno-compare-distinct-pointer-types \ -Wno-gnu-variable-sized-type-not-at-end \ -Wno-address-of-packed-member -Wno-tautological-compare \ -O2 -emit-llvm -c /git/linux/samples/bpf/sockex1_kern.c -o -| llc -march=bpf -filetype=obj -o samples/bpf/sockex1_kern.o HOSTLD samples/bpf/tc_l2_redirect <SNIP> HOSTLD samples/bpf/lwt_len_hist HOSTLD samples/bpf/xdp_tx_iptunnel make[1]: Leaving directory '/tmp/build/linux' [root@f5065a7d6272 linux]# And then, in the host: [root@jouet bpf]# mount | grep "docker.*devicemapper\/" /dev/mapper/docker-253:0-1705076-9bd8aa1e0af33adce89ff42090847868ca676932878942be53941a06ec5923f9 on /var/lib/docker/devicemapper/mnt/9bd8aa1e0af33adce89ff42090847868ca676932878942be53941a06ec5923f9 type xfs (rw,relatime,context="system_u:object_r:container_file_t:s0:c73,c276",nouuid,attr2,inode64,sunit=1024,swidth=1024,noquota) [root@jouet bpf]# cd /var/lib/docker/devicemapper/mnt/9bd8aa1e0af33adce89ff42090847868ca676932878942be53941a06ec5923f9/rootfs/tmp/build/linux/samples/bpf/ [root@jouet bpf]# file offwaketime offwaketime: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=f423d171e0487b2f802b6a792657f0f3c8f6d155, not stripped [root@jouet bpf]# readelf -SW offwaketime offwaketime offwaketime_kern.o offwaketime_user.o [root@jouet bpf]# readelf -SW offwaketime_kern.o There are 11 section headers, starting at offset 0x700: Section Headers: [Nr] Name Type Address Off Size ES Flg Lk Inf Al [ 0] NULL 0000000000000000 000000 000000 00 0 0 0 [ 1] .strtab STRTAB 0000000000000000 000658 0000a8 00 0 0 1 [ 2] .text PROGBITS 0000000000000000 000040 000000 00 AX 0 0 4 [ 3] kprobe/try_to_wake_up PROGBITS 0000000000000000 000040 0000d8 00 AX 0 0 8 [ 4] .relkprobe/try_to_wake_up REL 0000000000000000 0005a8 000020 10 10 3 8 [ 5] tracepoint/sched/sched_switch PROGBITS 0000000000000000 000118 000318 00 AX 0 0 8 [ 6] .reltracepoint/sched/sched_switch REL 0000000000000000 0005c8 000090 10 10 5 8 [ 7] maps PROGBITS 0000000000000000 000430 000050 00 WA 0 0 4 [ 8] license PROGBITS 0000000000000000 000480 000004 00 WA 0 0 1 [ 9] version PROGBITS 0000000000000000 000484 000004 00 WA 0 0 4 [10] .symtab SYMTAB 0000000000000000 000488 000120 18 1 4 8 Key to Flags: W (write), A (alloc), X (execute), M (merge), S (strings) I (info), L (link order), G (group), T (TLS), E (exclude), x (unknown) O (extra OS processing required) o (OS specific), p (processor specific) [root@jouet bpf]# ./offwaketime | head -3 qemu-system-x86;entry_SYSCALL_64_fastpath;sys_ppoll;do_sys_poll;poll_schedule_timeout;schedule_hrtimeout_range;schedule_hrtimeout_range_clock;schedule;__schedule;-;try_to_wake_up;hrtimer_wakeup;__hrtimer_run_queues;hrtimer_interrupt;local_apic_timer_interrupt;smp_apic_timer_interrupt;__irqentry_text_start;cpuidle_enter_state;cpuidle_enter;call_cpuidle;cpu_startup_entry;rest_init;start_kernel;x86_64_start_reservations;x86_64_start_kernel;start_cpu;;swapper/0 4 firefox;entry_SYSCALL_64_fastpath;sys_poll;do_sys_poll;poll_schedule_timeout;schedule_hrtimeout_range;schedule_hrtimeout_range_clock;schedule;__schedule;-;try_to_wake_up;pollwake;__wake_up_common;__wake_up_sync_key;pipe_write;__vfs_write;vfs_write;sys_write;entry_SYSCALL_64_fastpath;;Timer 1 swapper/2;start_cpu;start_secondary;cpu_startup_entry;schedule_preempt_disabled;schedule;__schedule;-;---;; 61 [root@jouet bpf]# Signed-off-by: Joe Stringer <joe@ovn.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Wang Nan <wangnan0@huawei.com> Cc: netdev@vger.kernel.org Link: https://github.com/joestringer/linux/commit/5c40f54a52b1f437123c81e21873f4b4b1f9bd55.patch Link: http://lkml.kernel.org/n/tip-xr8twtx7sjh5821g8qw47yxk@git.kernel.org [ Use -I$(srctree)/tools/lib/ to support out of source code tree builds, as noticed by Wang Nan ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-20samples/bpf: Make perf_event_read() staticArnaldo Carvalho de Melo
While testing Joe's conversion of samples/bpf/ to use tools/lib/bpf/ I noticed some warnings building samples/bpf/ on a Fedora Rawhide container, with clang/llvm 3.9 I noticed this: [root@1e797fdfbf4f linux]# make -j4 O=/tmp/build/linux/ samples/bpf/ make[1]: Entering directory '/tmp/build/linux' CHK include/config/kernel.release GEN ./Makefile CHK include/generated/uapi/linux/version.h Using /git/linux as source for kernel <SNIP> HOSTCC samples/bpf/trace_output_user.o /git/linux/samples/bpf/trace_output_user.c:64:6: warning: no previous prototype for 'perf_event_read' [-Wmissing-prototypes] void perf_event_read(print_fn fn) ^~~~~~~~~~~~~~~ HOSTLD samples/bpf/trace_output make[1]: Leaving directory '/tmp/build/linux' Shut up the compiler by making that function static. Acked-by: Daniel Borkmann <daniel@iogearbox.net> Cc: Alexei Starovoitov <ast@fb.com> Cc: Joe Stringer <joe@ovn.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/20161215152927.GC6866@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-17Merge branch 'kbuild' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild Pull kbuild updates from Michal Marek: - prototypes for x86 asm-exported symbols (Adam Borowski) and a warning about missing CRCs (Nick Piggin) - asm-exports fix for LTO (Nicolas Pitre) - thin archives improvements (Nick Piggin) - linker script fix for CONFIG_LD_DEAD_CODE_DATA_ELIMINATION (Nick Piggin) - genksyms support for __builtin_va_list keyword - misc minor fixes * 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: x86/kbuild: enable modversions for symbols exported from asm kbuild: fix scripts/adjust_autoksyms.sh* for the no modules case scripts/kallsyms: remove last remnants of --page-offset option make use of make variable CURDIR instead of calling pwd kbuild: cmd_export_list: tighten the sed script kbuild: minor improvement for thin archives build kbuild: modpost warn if export version crc is missing kbuild: keep data tables through dead code elimination kbuild: improve linker compatibility with lib-ksyms.o build genksyms: Regenerate parser kbuild/genksyms: handle va_list type kbuild: thin archives for multi-y targets kbuild: kallsyms allow 3-pass generation if symbols size has changed
2016-12-15samples/bpf: Make samples more libbpf-centricJoe Stringer
Switch all of the sample code to use the function names from tools/lib/bpf so that they're consistent with that, and to declare their own log buffers. This allow the next commit to be purely devoted to getting rid of the duplicate library in samples/bpf. Committer notes: Testing it: On a fedora rawhide container, with clang/llvm 3.9, sharing the host linux kernel git tree: # make O=/tmp/build/linux/ headers_install # make O=/tmp/build/linux -C samples/bpf/ Since I forgot to make it privileged, just tested it outside the container, using what it generated: # uname -a Linux jouet 4.9.0-rc8+ #1 SMP Mon Dec 12 11:20:49 BRT 2016 x86_64 x86_64 x86_64 GNU/Linux # cd /var/lib/docker/devicemapper/mnt/c43e09a53ff56c86a07baf79847f00e2cc2a17a1e2220e1adbf8cbc62734feda/rootfs/tmp/build/linux/samples/bpf/ # ls -la offwaketime -rwxr-xr-x. 1 root root 24200 Dec 15 12:19 offwaketime # file offwaketime offwaketime: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=c940d3f127d5e66cdd680e42d885cb0b64f8a0e4, not stripped # readelf -SW offwaketime_kern.o | grep PROGBITS [ 2] .text PROGBITS 0000000000000000 000040 000000 00 AX 0 0 4 [ 3] kprobe/try_to_wake_up PROGBITS 0000000000000000 000040 0000d8 00 AX 0 0 8 [ 5] tracepoint/sched/sched_switch PROGBITS 0000000000000000 000118 000318 00 AX 0 0 8 [ 7] maps PROGBITS 0000000000000000 000430 000050 00 WA 0 0 4 [ 8] license PROGBITS 0000000000000000 000480 000004 00 WA 0 0 1 [ 9] version PROGBITS 0000000000000000 000484 000004 00 WA 0 0 4 # ./offwaketime | head -5 swapper/1;start_secondary;cpu_startup_entry;schedule_preempt_disabled;schedule;__schedule;-;---;; 106 CPU 0/KVM;entry_SYSCALL_64_fastpath;sys_ioctl;do_vfs_ioctl;kvm_vcpu_ioctl;kvm_arch_vcpu_ioctl_run;kvm_vcpu_block;schedule;__schedule;-;try_to_wake_up;swake_up_locked;swake_up;apic_timer_expired;apic_timer_fn;__hrtimer_run_queues;hrtimer_interrupt;local_apic_timer_interrupt;smp_apic_timer_interrupt;__irqentry_text_start;cpuidle_enter;call_cpuidle;cpu_startup_entry;start_secondary;;swapper/3 2 Compositor;entry_SYSCALL_64_fastpath;sys_futex;do_futex;futex_wait;futex_wait_queue_me;schedule;__schedule;-;try_to_wake_up;futex_requeue;do_futex;sys_futex;entry_SYSCALL_64_fastpath;;SoftwareVsyncTh 5 firefox;entry_SYSCALL_64_fastpath;sys_poll;do_sys_poll;poll_schedule_timeout;schedule_hrtimeout_range;schedule_hrtimeout_range_clock;schedule;__schedule;-;try_to_wake_up;pollwake;__wake_up_common;__wake_up_sync_key;pipe_write;__vfs_write;vfs_write;sys_write;entry_SYSCALL_64_fastpath;;Timer 13 JS Helper;entry_SYSCALL_64_fastpath;sys_futex;do_futex;futex_wait;futex_wait_queue_me;schedule;__schedule;-;try_to_wake_up;do_futex;sys_futex;entry_SYSCALL_64_fastpath;;firefox 2 # Signed-off-by: Joe Stringer <joe@ovn.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Wang Nan <wangnan0@huawei.com> Cc: netdev@vger.kernel.org Link: http://lkml.kernel.org/r/20161214224342.12858-2-joe@ovn.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-11make use of make variable CURDIR instead of calling pwdUwe Kleine-König
make already provides the current working directory in a variable, so make use of it instead of forking a shell. Also replace usage of PWD by CURDIR. PWD is provided by most shells, but not all, so this makes the build system more robust. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Michal Marek <mmarek@suse.com>
2016-12-08bpf: xdp: Add XDP example for head adjustmentMartin KaFai Lau
The XDP prog checks if the incoming packet matches any VIP:PORT combination in the BPF hashmap. If it is, it will encapsulate the packet with a IPv4/v6 header as instructed by the value of the BPF hashmap and then XDP_TX it out. The VIP:PORT -> IP-Encap-Info can be specified by the cmd args of the user prog. Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-03samples, bpf: Add automated test for cgroup filter attachmentsSargun Dhillon
This patch adds the sample program test_cgrp2_attach2. This program is similar to test_cgrp2_attach, but it performs automated testing of the cgroupv2 BPF attached filters. It runs the following checks: * Simple filter attachment * Application of filters to child cgroups * Overriding filters on child cgroups * Checking that this still works when the parent filter is removed The filters that are used here are simply allow all / deny all filters, so it isn't checking the actual functionality of the filters, but rather the behaviour around detachment / attachment. If net_cls is enabled, this test will fail. Signed-off-by: Sargun Dhillon <sargun@sargun.me> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-03samples, bpf: Refactor test_current_task_under_cgroup - separate out helpersSargun Dhillon
This patch modifies test_current_task_under_cgroup_user. The test has several helpers around creating a temporary environment for cgroup testing, and moving the current task around cgroups. This set of helpers can then be used in other tests. Signed-off-by: Sargun Dhillon <sargun@sargun.me> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-03samples/bpf: silence compiler warningsAlexei Starovoitov
silence some of the clang compiler warnings like: include/linux/fs.h:2693:9: warning: comparison of unsigned enum expression < 0 is always false arch/x86/include/asm/processor.h:491:30: warning: taking address of packed member 'sp0' of class or structure 'x86_hw_tss' may result in an unaligned pointer value include/linux/cgroup-defs.h:326:16: warning: field 'cgrp' with variable sized type 'struct cgroup' not at the end of a struct or class is a GNU extension since they add too much noise to samples/bpf/ build. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-03Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
Couple conflicts resolved here: 1) In the MACB driver, a bug fix to properly initialize the RX tail pointer properly overlapped with some changes to support variable sized rings. 2) In XGBE we had a "CONFIG_PM" --> "CONFIG_PM_SLEEP" fix overlapping with a reorganization of the driver to support ACPI, OF, as well as PCI variants of the chip. 3) In 'net' we had several probe error path bug fixes to the stmmac driver, meanwhile a lot of this code was cleaned up and reorganized in 'net-next'. 4) The cls_flower classifier obtained a helper function in 'net-next' called __fl_delete() and this overlapped with Daniel Borkamann's bug fix to use RCU for object destruction in 'net'. It also overlapped with Jiri's change to guard the rhashtable_remove_fast() call with a check against tc_skip_sw(). 5) In mlx4, a revert bug fix in 'net' overlapped with some unrelated changes in 'net-next'. 6) In geneve, a stale header pointer after pskb_expand_head() bug fix in 'net' overlapped with a large reorganization of the same code in 'net-next'. Since the 'net-next' code no longer had the bug in question, there was nothing to do other than to simply take the 'net-next' hunks. Signed-off-by: David S. Miller <davem@davemloft.net>
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