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2017-10-19livepatch: add (un)patch callbacksJoe Lawrence
Provide livepatch modules a klp_object (un)patching notification mechanism. Pre and post-(un)patch callbacks allow livepatch modules to setup or synchronize changes that would be difficult to support in only patched-or-unpatched code contexts. Callbacks can be registered for target module or vmlinux klp_objects, but each implementation is klp_object specific. - Pre-(un)patch callbacks run before any (un)patching transition starts. - Post-(un)patch callbacks run once an object has been (un)patched and the klp_patch fully transitioned to its target state. Example use cases include modification of global data and registration of newly available services/handlers. See Documentation/livepatch/callbacks.txt for details and samples/livepatch/ for examples. Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Acked-by: Miroslav Benes <mbenes@suse.cz> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2017-10-18samples/bpf: add cpumap sample program xdp_redirect_cpuJesper Dangaard Brouer
This sample program show how to use cpumap and the associated tracepoints. It provides command line stats, which shows how the XDP-RX process, cpumap-enqueue and cpumap kthread dequeue is cooperating on a per CPU basis. It also utilize the xdp_exception and xdp_redirect_err transpoints to allow users quickly to identify setup issues. One issue with ixgbe driver is that the driver reset the link when loading XDP. This reset the procfs smp_affinity settings. Thus, after loading the program, these must be reconfigured. The easiest workaround it to reduce the RX-queue to e.g. two via: # ethtool --set-channels ixgbe1 combined 2 And then add CPUs above 0 and 1, like: # xdp_redirect_cpu --dev ixgbe1 --prog 2 --cpu 2 --cpu 3 --cpu 4 Another issue with ixgbe is that the page recycle mechanism is tied to the RX-ring size. And the default setting of 512 elements is too small. This is the same issue with regular devmap XDP_REDIRECT. To overcome this I've been using 1024 rx-ring size: # ethtool -G ixgbe1 rx 1024 tx 1024 V3: - whitespace cleanups - bpf tracepoint cannot access top part of struct V4: - report on kthread sched events, according to tracepoint change - report average bulk enqueue size V5: - bpf_map_lookup_elem on cpumap not allowed from bpf_prog use separate map to mark CPUs not available V6: - correct kthread sched summary output V7: - Added a --stress-mode for concurrently changing underlying cpumap Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-18Merge tag 'trace-v4.14-rc3' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull tracing fix from Steven Rostedt: "Testing a new trace event format, I triggered a bug by doing: # modprobe trace-events-sample # echo 1 > /sys/kernel/debug/tracing/events/sample-trace/enable # rmmod trace-events-sample This would cause an oops. The issue is that I added another trace event sample that reused a reg function of another trace event to create a thread to call the tracepoints. The problem was that the reg function couldn't handle nested calls (reg; reg; unreg; unreg;) and created two threads (instead of one) and only removed one on exit. This isn't a critical bug as the bug is only in sample code. But sample code should be free of known bugs to prevent others from copying it. This is why this is also marked for stable" * tag 'trace-v4.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tracing/samples: Fix creation and deletion of simple_thread_fn creation
2017-10-17tracing/samples: Fix creation and deletion of simple_thread_fn creationSteven Rostedt (VMware)
Commit 7496946a8 ("tracing: Add samples of DECLARE_EVENT_CLASS() and DEFINE_EVENT()") added template examples for all the events. It created a DEFINE_EVENT_FN() example which reused the foo_bar_reg and foo_bar_unreg functions. Enabling both the TRACE_EVENT_FN() and DEFINE_EVENT_FN() example trace events caused the foo_bar_reg to be called twice, creating the test thread twice. The foo_bar_unreg would remove it only once, even if it was called multiple times, leaving a thread existing when the module is unloaded, causing an oops. Add a ref count and allow foo_bar_reg() and foo_bar_unreg() be called by multiple trace events. Cc: stable@vger.kernel.org Fixes: 7496946a8 ("tracing: Add samples of DECLARE_EVENT_CLASS() and DEFINE_EVENT()") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2017-10-16bpf: Add -target to clang switch while cross compiling.Abhijit Ayarekar
Update to llvm excludes assembly instructions. llvm git revision is below commit 65fad7c26569 ("bpf: add inline-asm support") This change will be part of llvm release 6.0 __ASM_SYSREG_H define is not required for native compile. -target switch includes appropriate target specific files while cross compiling Tested on x86 and arm64. Signed-off-by: Abhijit Ayarekar <abhijit.ayarekar@caviumnetworks.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-12tracing: Fix doc mistakes in trace sampleJeremy Linton
The trace sample file has a couple mispellings, lets fix them. Signed-off-by: Jeremy Linton <jeremy.linton@arm.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2017-10-07bpf: add a test case for helper bpf_perf_prog_read_valueYonghong Song
The bpf sample program trace_event is enhanced to use the new helper to print out enabled/running time. Signed-off-by: Yonghong Song <yhs@fb.com> Acked-by: Alexei Starovoitov <ast@fb.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-07bpf: add a test case for helper bpf_perf_event_read_valueYonghong Song
The bpf sample program tracex6 is enhanced to use the new helper to read enabled/running time as well. Signed-off-by: Yonghong Song <yhs@fb.com> Acked-by: Alexei Starovoitov <ast@fb.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-06samples/bpf: xdp_monitor increase memory rlimitJesper Dangaard Brouer
Other concurrent running programs, like perf or the XDP program what needed to be monitored, might take up part of the max locked memory limit. Thus, the xdp_monitor tool have to set the RLIMIT_MEMLOCK to RLIM_INFINITY, as it cannot determine a more sane limit. Using the man exit(3) specified EXIT_FAILURE return exit code, and correct other users too. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-06samples/bpf: xdp_monitor also record xdp_exception tracepointJesper Dangaard Brouer
Also monitor the tracepoint xdp_exception. This tracepoint is usually invoked by the drivers. Programs themselves can activate this by returning XDP_ABORTED, which will drop the packet but also trigger the tracepoint. This is useful for distinguishing intentional (XDP_DROP) vs. ebpf-program error cases that cased a drop (XDP_ABORTED). Drivers also use this tracepoint for reporting on XDP actions that are unknown to the specific driver. This can help the user to detect if a driver e.g. doesn't implement XDP_REDIRECT yet. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-06samples/bpf: xdp_monitor first 8 bytes are not accessible by bpfJesper Dangaard Brouer
The first 8 bytes of the tracepoint context struct are not accessible by the bpf code. This is a choice that dates back to the original inclusion of this code. See explaination in: commit 98b5c2c65c29 ("perf, bpf: allow bpf programs attach to tracepoints") 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>
2017-10-04samples/bpf: use bpf_prog_query() interfaceAlexei Starovoitov
use BPF_PROG_QUERY command to strengthen test coverage Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-04samples/bpf: add multi-prog cgroup test caseAlexei Starovoitov
create 5 cgroups, attach 6 progs and check that progs are executed as: cgrp1 (MULTI progs A, B) -> cgrp2 (OVERRIDE prog C) -> cgrp3 (MULTI prog D) -> cgrp4 (OVERRIDE prog E) -> cgrp5 (NONE prog F) the event in cgrp5 triggers execution of F,D,A,B in that order. if prog F is detached, the execution is E,D,A,B if prog F and D are detached, the execution is E,A,B if prog F, E and D are detached, the execution is C,A,B Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-04[media] media: v4l2-pci-skeleton: Fix error handling path in 'skeleton_probe()'Christophe JAILLET
If this memory allocation fails, we must release some resources, as already done in the code below and above. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
2017-10-02vfio-mdev/samples: make mdev_fops const and staticBhumika Goyal
Make this const as it is only passed to a const argument of the function mdev_register_device. Make it static as it is not referenced in any other file. Structure found using Coccinelle and changes done by hand. Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2017-10-01samples/bpf: fix warnings in xdp_monitor_userStephen Hemminger
Make local functions static to fix HOSTCC samples/bpf/xdp_monitor_user.o samples/bpf/xdp_monitor_user.c:64:7: warning: no previous prototype for ‘gettime’ [-Wmissing-prototypes] __u64 gettime(void) ^~~~~~~ samples/bpf/xdp_monitor_user.c:209:6: warning: no previous prototype for ‘print_bpf_prog_info’ [-Wmissing-prototypes] void print_bpf_prog_info(void) ^~~~~~~~~~~~~~~~~~~ Fixes: 3ffab5460264 ("samples/bpf: xdp_monitor tool based on tracepoints") Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-29bpf: libbpf: Provide basic API support to specify BPF obj nameMartin KaFai Lau
This patch extends the libbpf to provide API support to allow specifying BPF object name. In tools/lib/bpf/libbpf, the C symbol of the function and the map is used. Regarding section name, all maps are under the same section named "maps". Hence, section name is not a good choice for map's name. To be consistent with map, bpf_prog also follows and uses its function symbol as the prog's name. This patch adds logic to collect function's symbols in libbpf. There is existing codes to collect the map's symbols and no change is needed. The bpf_load_program_name() and bpf_map_create_name() are added to take the name argument. For the other bpf_map_create_xxx() variants, a name argument is directly added to them. In samples/bpf, bpf_load.c in particular, the symbol is also used as the map's name and the map symbols has already been collected in the existing code. For bpf_prog, bpf_load.c does not collect the function symbol name. We can consider to collect them later if there is a need to continue supporting the bpf_load.c. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Acked-by: Alexei Starovoitov <ast@fb.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-28samples/kprobes: Add s390 case in kprobe example moduleJohannes Thumshirn
Add info prints in sample kprobe handlers for S/390 Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2017-09-21samples/bpf: Add documentation on cross compilationJoel Fernandes
Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Joel Fernandes <joelaf@google.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-21samples/bpf: Fix pt_regs issues when cross-compilingJoel Fernandes
BPF samples fail to build when cross-compiling for ARM64 because of incorrect pt_regs param selection. This is because clang defines __x86_64__ and bpf_headers thinks we're building for x86. Since clang is building for the BPF target, it shouldn't make assumptions about what target the BPF program is going to run on. To fix this, lets pass ARCH so the header knows which target the BPF program is being compiled for and can use the correct pt_regs code. Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Joel Fernandes <joelaf@google.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-21samples/bpf: Enable cross compiler supportJoel Fernandes
When cross compiling, bpf samples use HOSTCC for compiling the non-BPF part of the sample, however what we really want is to use the cross compiler to build for the cross target since that is what will load and run the BPF sample. Detect this and compile samples correctly. Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Joel Fernandes <joelaf@google.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-21samples/bpf: Use getppid instead of getpgrp for array map stressJoel Fernandes
When cross-compiling the bpf sample map_perf_test for aarch64, I find that __NR_getpgrp is undefined. This causes build errors. This syscall is deprecated and requires defining __ARCH_WANT_SYSCALL_DEPRECATED. To avoid having to define that, just use a different syscall (getppid) for the array map stress test. Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Joel Fernandes <joelaf@google.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-14livepatch: introduce shadow variable APIJoe Lawrence
Add exported API for livepatch modules: klp_shadow_get() klp_shadow_alloc() klp_shadow_get_or_alloc() klp_shadow_free() klp_shadow_free_all() that implement "shadow" variables, which allow callers to associate new shadow fields to existing data structures. This is intended to be used by livepatch modules seeking to emulate additions to data structure definitions. See Documentation/livepatch/shadow-vars.txt for a summary of the new shadow variable API, including a few common use cases. See samples/livepatch/livepatch-shadow-* for example modules that demonstrate shadow variables. [jkosina@suse.cz: fix __klp_shadow_get_or_alloc() comment as spotted by Josh] Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Acked-by: Miroslav Benes <mbenes@suse.cz> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2017-09-07Merge tag 'media/v4.14-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media updates from Mauro Carvalho Chehab: "Brazil's Independence Day pull request :-) This is one of the biggest media pull requests, with 625 patches affecting almost all parts of media (RC, DVB, V4L2, CEC, docs). This contains: - A lot of new drivers: * DVB frontends: mxl5xx, stv0910, stv6111; * camera flash: as3645a led driver; * HDMI receiver: adv748X; * camera sensor: Omnivision 6650 5M driver (ov6650); * HDMI CEC: ao-cec meson driver; * V4L2: Qualcom camss driver; * Remote controller: gpio-ir-tx, pwm-ir-tx and zx-irdec drivers. - The DDbridge DVB driver got a massive update, with makes it in sync with modern hardware from that vendor; - There's an important milestone on this series: the DVB documentation was written in 2003, but only started to be updated in 2007. It also used to contain several gaps from the time it was kept out of tree, mentioning error codes and device nodes that never existed upstream. On this series, it received a massive update: all non-deprecated digital TV APIs are now in sync with the current implementation; - Some DVB APIs that aren't used by any upstream driver got removed; - Other parts of the media documentation algo got updated, fixing some bugs on its PDF output and making it compatible with Sphinx version 1.6. As the number of hacks required to build PDF output reduced, I hope we'll have less troubles as newer versions of our documentation toolchain are released (famous last words); - As usual, lots of driver cleanups and improvements" * tag 'media/v4.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (624 commits) media: leds: as3645a: add V4L2_FLASH_LED_CLASS dependency media: get rid of removed DMX_GET_CAPS and DMX_SET_SOURCE leftovers media: Revert "[media] v4l: async: make v4l2 coexist with devicetree nodes in a dt overlay" media: staging: atomisp: sh_css_calloc shall return a pointer to the allocated space media: Revert "[media] lirc_dev: remove superfluous get/put_device() calls" media: add qcom_camss.rst to v4l-drivers rst file media: dvb headers: make checkpatch happier media: dvb uapi: move frontend legacy API to another part of the book media: pixfmt-srggb12p.rst: better format the table for PDF output media: docs-rst: media: Don't use \small for V4L2_PIX_FMT_SRGGB10 documentation media: index.rst: don't write "Contents:" on PDF output media: pixfmt*.rst: replace a two dots by a comma media: vidioc-g-fmt.rst: adjust table format media: vivid.rst: add a blank line to correct ReST format media: v4l2 uapi book: get rid of driver programming's chapter media: format.rst: use the right markup for important notes media: docs-rst: cardlists: change their format to flat-tables media: em28xx-cardlist.rst: update to reflect last changes media: v4l2-event.rst: adjust table to fit on PDF output media: docs: don't show ToC for each part on PDF output ...
2017-09-01bpf: Add lru_hash_lookup performance testMartin KaFai Lau
Create a new case to test the LRU lookup performance. At the beginning, the LRU map is fully loaded (i.e. the number of keys is equal to map->max_entries). The lookup is done through key 0 to num_map_entries and then repeats from 0 again. This patch also creates an anonymous struct to properly name the test params in stress_lru_hmap_alloc() in map_perf_test_kern.c. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-01samples/bpf: Update cgroup socket examples to use uid gid helperDavid Ahern
Signed-off-by: David Ahern <dsahern@gmail.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-01samples/bpf: Update cgrp2 socket testsDavid Ahern
Update cgrp2 bpf sock tests to check that device, mark and priority can all be set on a socket via bpf programs attached to a cgroup. Signed-off-by: David Ahern <dsahern@gmail.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-01samples/bpf: Add option to dump socket settingsDavid Ahern
Add option to dump socket settings. Will be used in the next patch to verify bpf programs are correctly setting mark, priority and device based on the cgroup attachment for the program run. Signed-off-by: David Ahern <dsahern@gmail.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-01samples/bpf: Add detach option to test_cgrp2_sockDavid Ahern
Add option to detach programs from a cgroup. Signed-off-by: David Ahern <dsahern@gmail.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-01samples/bpf: Update sock test to allow setting mark and priorityDavid Ahern
Update sock test to set mark and priority on socket create. Signed-off-by: David Ahern <dsahern@gmail.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-31samples/bpf: Fix compilation issue in redirect dummy programTariq Toukan
Fix compilation error below: $ make samples/bpf/ LLVM ERROR: 'xdp_redirect_dummy' label emitted multiple times to assembly file make[1]: *** [samples/bpf/xdp_redirect_kern.o] Error 1 make: *** [samples/bpf/] Error 2 Fixes: 306da4e685b4 ("samples/bpf: xdp_redirect load XDP dummy prog on TX device") Signed-off-by: Tariq Toukan <tariqt@mellanox.com> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-29samples/bpf: xdp_monitor tool based on tracepointsJesper Dangaard Brouer
This tool xdp_monitor demonstrate how to use the different xdp_redirect tracepoints xdp_redirect{,_map}{,_err} from a BPF program. The default mode is to only monitor the error counters, to avoid affecting the per packet performance. Tracepoints comes with a base overhead of 25 nanosec for an attached bpf_prog, and 48 nanosec for using a full perf record (with non-matching filter). Thus, default loading the --stats mode could affect the maximum performance. This version of the tool is very simple and count all types of errors as one. It will be natural to extend this later with the different types of errors that can occur, which should help users quickly identify common mistakes. Because the TP_STRUCT was kept in sync all the tracepoints loads the same BPF code. It would also be natural to extend the map version to demonstrate how the map information could be used. 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>
2017-08-29samples/bpf: xdp_redirect load XDP dummy prog on TX deviceJesper Dangaard Brouer
For supporting XDP_REDIRECT, a device driver must (obviously) implement the "TX" function ndo_xdp_xmit(). An additional requirement is you cannot TX out a device, unless it also have a xdp bpf program attached. This dependency is caused by the driver code need to setup XDP resources before it can ndo_xdp_xmit. Update bpf samples xdp_redirect and xdp_redirect_map to automatically attach a dummy XDP program to the configured ifindex_out device. Use the XDP flag XDP_FLAGS_UPDATE_IF_NOEXIST on the dummy load, to avoid overriding an existing XDP prog on the device. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-28samples/bpf: extend test_tunnel_bpf.sh with ERSPANWilliam Tu
Extend existing tests for vxlan, gre, geneve, ipip to include ERSPAN tunnel. Signed-off-by: William Tu <u9012063@gmail.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-28bpf: convert sockmap field attach_bpf_fd2 to typeJohn Fastabend
In the initial sockmap API we provided strparser and verdict programs using a single attach command by extending the attach API with a the attach_bpf_fd2 field. However, if we add other programs in the future we will be adding a field for every new possible type, attach_bpf_fd(3,4,..). This seems a bit clumsy for an API. So lets push the programs using two new type fields. BPF_SK_SKB_STREAM_PARSER BPF_SK_SKB_STREAM_VERDICT This has the advantage of having a readable name and can easily be extended in the future. Updates to samples and sockmap included here also generalize tests slightly to support upcoming patch for multiple map support. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Fixes: 174a79ff9515 ("bpf: sockmap with sk redirect support") Suggested-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-20media: v4l2-pci-skeleton: constify vb2_ops structuresJulia Lawall
These vb2_ops structures are only stored in the ops field of a vb2_queue structure, which is declared as const. Thus the vb2_ops structures themselves can be const. Done with the help of Coccinelle. // <smpl> @r disable optional_qualifier@ identifier i; position p; @@ static struct vb2_ops i@p = { ... }; @ok@ identifier r.i; struct vb2_queue e; position p; @@ e.ops = &i@p; @bad@ position p != {r.p,ok.p}; identifier r.i; struct vb2_ops e; @@ e@i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct vb2_ops i = { ... }; // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-08-19bpf: Allow numa selection in INNER_LRU_HASH_PREALLOC test of map_perf_testMartin KaFai Lau
This patch makes the needed changes to allow each process of the INNER_LRU_HASH_PREALLOC test to provide its numa node id when creating the lru map. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-16bpf: sockmap sample programJohn Fastabend
This program binds a program to a cgroup and then matches hard coded IP addresses and adds these to a sockmap. This will receive messages from the backend and send them to the client. client:X <---> frontend:10000 client:X <---> backend:10001 To keep things simple this is only designed for 1:1 connections using hard coded values. A more complete example would allow many backends and clients. To run, # sockmap <cgroup2_dir> Signed-off-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-07bpf: add a test case for syscalls/sys_{enter|exit}_* tracepointsYonghong Song
Signed-off-by: Yonghong Song <yhs@fb.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-01Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
Two minor conflicts in virtio_net driver (bug fix overlapping addition of a helper) and MAINTAINERS (new driver edit overlapping revamp of PHY entry). Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-31samples/bpf: fix bpf tunnel cleanupWilliam Tu
test_tunnel_bpf.sh fails to remove the vxlan11 tunnel device, causing the next geneve tunnelling test case fails. In addition, the geneve reserved bit in tcbpf2_kern.c should be zero, according to the RFC. Signed-off-by: William Tu <u9012063@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-21Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
2017-07-17samples/bpf: add option for native and skb mode for redirect appsAndy Gospodarek
When testing with a driver that has both native and generic redirect support: $ sudo ./samples/bpf/xdp_redirect -N 5 6 input: 5 output: 6 ifindex 6: 4961879 pkt/s ifindex 6: 6391319 pkt/s ifindex 6: 6419468 pkt/s $ sudo ./samples/bpf/xdp_redirect -S 5 6 input: 5 output: 6 ifindex 6: 1845435 pkt/s ifindex 6: 3882850 pkt/s ifindex 6: 3893974 pkt/s $ sudo ./samples/bpf/xdp_redirect_map -N 5 6 input: 5 output: 6 map[0] (vports) = 4, map[1] (map) = 5, map[2] (count) = 0 ifindex 6: 2207374 pkt/s ifindex 6: 6212869 pkt/s ifindex 6: 6286515 pkt/s $ sudo ./samples/bpf/xdp_redirect_map -S 5 6 input: 5 output: 6 map[0] (vports) = 4, map[1] (map) = 5, map[2] (count) = 0 ifindex 6: 5052528 pkt/s ifindex 6: 5736631 pkt/s ifindex 6: 5739962 pkt/s Signed-off-by: Andy Gospodarek <andy@greyhouse.net> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-17xdp: bpf redirect with map sample programJohn Fastabend
Signed-off-by: John Fastabend <john.fastabend@gmail.com> Tested-by: Andy Gospodarek <andy@greyhouse.net> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-17xdp: sample program for new bpf_redirect helperJohn Fastabend
This implements a sample program for testing bpf_redirect. It reports the number of packets redirected per second and as input takes the ifindex of the device to run the xdp program on and the ifindex of the interface to redirect packets to. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Tested-by: Andy Gospodarek <andy@greyhouse.net> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-13Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge yet more updates from Andrew Morton: - various misc things - kexec updates - sysctl core updates - scripts/gdb udpates - checkpoint-restart updates - ipc updates - kernel/watchdog updates - Kees's "rough equivalent to the glibc _FORTIFY_SOURCE=1 feature" - "stackprotector: ascii armor the stack canary" - more MM bits - checkpatch updates * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (96 commits) writeback: rework wb_[dec|inc]_stat family of functions ARM: samsung: usb-ohci: move inline before return type video: fbdev: omap: move inline before return type video: fbdev: intelfb: move inline before return type USB: serial: safe_serial: move __inline__ before return type drivers: tty: serial: move inline before return type drivers: s390: move static and inline before return type x86/efi: move asmlinkage before return type sh: move inline before return type MIPS: SMP: move asmlinkage before return type m68k: coldfire: move inline before return type ia64: sn: pci: move inline before type ia64: move inline before return type FRV: tlbflush: move asmlinkage before return type CRIS: gpio: move inline before return type ARM: HP Jornada 7XX: move inline before return type ARM: KVM: move asmlinkage before type checkpatch: improve the STORAGE_CLASS test mm, migration: do not trigger OOM killer when migrating memory drm/i915: use __GFP_RETRY_MAYFAIL ...
2017-07-12kfifo: clean up example to not use page_linkLogan Gunthorpe
This is a layering violation so we replace the uses with calls to sg_page(). This is a prep patch for replacing page_link and this is one of the very few uses outside of scatterlist.h. Link: http://lkml.kernel.org/r/1495663199-22234-1-git-send-email-logang@deltatee.com Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Stephen Bates <sbates@raithlin.com> Acked-by: Stefani Seibold <stefani@seibold.net> Cc: Stefani Seibold <stefani@seibold.net> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-07-11samples/bpf: fix a build issueYonghong Song
With latest net-next: ==== 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 -Isamples/bpf \ -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 \ -Wno-unknown-warning-option \ -O2 -emit-llvm -c samples/bpf/tcp_synrto_kern.c -o -| llc -march=bpf -filetype=obj -o samples/bpf/tcp_synrto_kern.o samples/bpf/tcp_synrto_kern.c:20:10: fatal error: 'bpf_endian.h' file not found ^~~~~~~~~~~~~~ 1 error generated. ==== net has the same issue. Add support for ntohl and htonl in tools/testing/selftests/bpf/bpf_endian.h. Also move bpf_helpers.h from samples/bpf to selftests/bpf and change compiler include logic so that programs in samples/bpf can access the headers in selftests/bpf, but not the other way around. Signed-off-by: Yonghong Song <yhs@fb.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Lawrence Brakmo <brakmo@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-05bpf: fix return in load_bpf_fileLawrence Brakmo
The function load_bpf_file ignores the return value of load_and_attach(), so even if load_and_attach() returns an error, load_bpf_file() will return 0. Now, load_bpf_file() can call load_and_attach() multiple times and some can succeed and some could fail. I think the correct behavor is to return error on the first failed load_and_attach(). v2: Added missing SOB Signed-off-by: Lawrence Brakmo <brakmo@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-01bpf: Sample bpf program to set sndcwnd clampLawrence Brakmo
Sample BPF program, tcp_clamp_kern.c, to demostrate the use of setting the sndcwnd clamp. This program assumes that if the first 5.5 bytes of the host's IPv6 addresses are the same, then the hosts are in the same datacenter and sets sndcwnd clamp to 100 packets, SYN and SYN-ACK RTOs to 10ms and send/receive buffer sizes to 150KB. Signed-off-by: Lawrence Brakmo <brakmo@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>