linux/tools/lib, branch v5.7

libbpf: Fix register naming in PT_REGS s390 macros

2020-05-14T19:44:17Z

Fix register naming in PT_REGS s390 macros Fixes: b8ebce86ffe6 ("libbpf: Provide CO-RE variants of PT_REGS macros") Signed-off-by: Sumanth Korikkar Signed-off-by: Alexei Starovoitov Reviewed-by: Julian Wiedmann Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20200513154414.29972-1-sumanthk@linux.ibm.com

libbpf: Only check mode flags in get_xdp_id

2020-04-23T05:07:22Z

The commit in the Fixes tag changed get_xdp_id to only return prog_id if flags is 0, but there are other XDP flags than the modes - e.g., XDP_FLAGS_UPDATE_IF_NOEXIST. Since the intention was only to look at MODE flags, clear other ones before checking if flags is 0. Fixes: f07cbad29741 ("libbpf: Fix bpf_get_link_xdp_id flags handling") Signed-off-by: David Ahern Signed-off-by: Alexei Starovoitov Acked-by: Andrey Ignatov

libbpf: Fix type of old_fd in bpf_xdp_set_link_opts

2020-04-15T11:26:08Z

The 'old_fd' parameter used for atomic replacement of XDP programs is supposed to be an FD, but was left as a u32 from an earlier iteration of the patch that added it. It was converted to an int when read, so things worked correctly even with negative values, but better change the definition to correctly reflect the intention. Fixes: bd5ca3ef93cd ("libbpf: Add function to set link XDP fd while specifying old program") Reported-by: David Ahern Signed-off-by: Toke Høiland-Jørgensen Signed-off-by: Daniel Borkmann Acked-by: David Ahern Acked-by: Song Liu Link: https://lore.kernel.org/bpf/20200414145025.182163-1-toke@redhat.com

libbpf: Always specify expected_attach_type on program load if supported

2020-04-15T11:22:43Z

For some types of BPF programs that utilize expected_attach_type, libbpf won't set load_attr.expected_attach_type, even if expected_attach_type is known from section definition. This was done to preserve backwards compatibility with old kernels that didn't recognize expected_attach_type attribute yet (which was added in 5e43f899b03a ("bpf: Check attach type at prog load time"). But this is problematic for some BPF programs that utilize newer features that require kernel to know specific expected_attach_type (e.g., extended set of return codes for cgroup_skb/egress programs). This patch makes libbpf specify expected_attach_type by default, but also detect support for this field in kernel and not set it during program load. This allows to have a good metadata for bpf_program (e.g., bpf_program__get_extected_attach_type()), but still work with old kernels (for cases where it can work at all). Additionally, due to expected_attach_type being always set for recognized program types, bpf_program__attach_cgroup doesn't have to do extra checks to determine correct attach type, so remove that additional logic. Also adjust section_names selftest to account for this change. More detailed discussion can be found in [0]. [0] https://lore.kernel.org/bpf/20200412003604.GA15986@rdna-mbp.dhcp.thefacebook.com/ Fixes: 5cf1e9145630 ("bpf: cgroup inet skb programs can return 0 to 3") Fixes: 5e43f899b03a ("bpf: Check attach type at prog load time") Reported-by: Andrey Ignatov Signed-off-by: Andrii Nakryiko Signed-off-by: Daniel Borkmann Acked-by: Song Liu Acked-by: Andrey Ignatov Link: https://lore.kernel.org/bpf/20200414182645.1368174-1-andriin@fb.com

Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

2020-04-10T00:39:22Z

Daniel Borkmann says: ==================== pull-request: bpf 2020-04-10 The following pull-request contains BPF updates for your *net* tree. We've added 13 non-merge commits during the last 7 day(s) which contain a total of 13 files changed, 137 insertions(+), 43 deletions(-). The main changes are: 1) JIT code emission fixes for riscv and arm32, from Luke Nelson and Xi Wang. 2) Disable vmlinux BTF info if GCC_PLUGIN_RANDSTRUCT is used, from Slava Bacherikov. 3) Fix oob write in AF_XDP when meta data is used, from Li RongQing. 4) Fix bpf_get_link_xdp_id() handling on single prog when flags are specified, from Andrey Ignatov. 5) Fix sk_assign() BPF helper for request sockets that can have sk_reuseport field uninitialized, from Joe Stringer. 6) Fix mprotect() test case for the BPF LSM, from KP Singh. ==================== Signed-off-by: David S. Miller

libbpf: Fix bpf_get_link_xdp_id flags handling

2020-04-07T22:57:35Z

Currently if one of XDP_FLAGS_{DRV,HW,SKB}_MODE flags is passed to bpf_get_link_xdp_id() and there is a single XDP program attached to ifindex, that program's id will be returned by bpf_get_link_xdp_id() in prog_id argument no matter what mode the program is attached in, i.e. flags argument is not taken into account. For example, if there is a single program attached with XDP_FLAGS_SKB_MODE but user calls bpf_get_link_xdp_id() with flags = XDP_FLAGS_DRV_MODE, that skb program will be returned. Fix it by returning info->prog_id only if user didn't specify flags. If flags is specified then return corresponding mode-specific-field from struct xdp_link_info. The initial error was introduced in commit 50db9f073188 ("libbpf: Add a support for getting xdp prog id on ifindex") and then refactored in 473f4e133a12 so 473f4e133a12 is used in the Fixes tag. Fixes: 473f4e133a12 ("libbpf: Add bpf_get_link_xdp_info() function to get more XDP information") Signed-off-by: Andrey Ignatov Signed-off-by: Daniel Borkmann Acked-by: Toke Høiland-Jørgensen Link: https://lore.kernel.org/bpf/0e9e30490b44b447bb2bebc69c7135e7fe7e4e40.1586236080.git.rdna@fb.com

lib/rbtree: fix coding style of assignments

2020-04-07T17:43:43Z

Leave blank space between the right-hand and left-hand side of the assignment to meet the kernel coding style better. Signed-off-by: chenqiwu Signed-off-by: Andrew Morton Reviewed-by: Michel Lespinasse Link: http://lkml.kernel.org/r/1582621140-25850-1-git-send-email-qiwuchen55@gmail.com Signed-off-by: Linus Torvalds

libbpf: Initialize *nl_pid so gcc 10 is happy

2020-04-06T19:51:54Z

Builds of Fedora's kernel-tools package started to fail with "may be used uninitialized" warnings for nl_pid in bpf_set_link_xdp_fd() and bpf_get_link_xdp_info() on the s390 architecture. Although libbpf_netlink_open() always returns a negative number when it does not set *nl_pid, the compiler does not determine this and thus believes the variable might be used uninitialized. Assuage gcc's fears by explicitly initializing nl_pid. Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1807781 Signed-off-by: Jeremy Cline Signed-off-by: Daniel Borkmann Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20200404051430.698058-1-jcline@redhat.com

Merge tag 'perf-urgent-2020-04-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2020-04-05T19:26:24Z

Pull more perf updates from Thomas Gleixner: "Perf updates all over the place: core: - Support for cgroup tracking in samples to allow cgroup based analysis tools: - Support for cgroup analysis - Commandline option and hotkey for perf top to change the sort order - A set of fixes all over the place - Various build system related improvements - Updates of the X86 pmu event JSON data - Documentation updates" * tag 'perf-urgent-2020-04-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (55 commits) perf python: Fix clang detection to strip out options passed in $CC perf tools: Support Python 3.8+ in Makefile perf script: Fix invalid read of directory entry after closedir() perf script report: Fix SEGFAULT when using DWARF mode perf script: add -S/--symbols documentation perf pmu-events x86: Use CPU_CLK_UNHALTED.THREAD in Kernel_Utilization metric perf events parser: Add missing Intel CPU events to parser perf script: Allow --symbol to accept hexadecimal addresses perf report/top TUI: Fix title line formatting perf top: Support hotkey to change sort order perf top: Support --group-sort-idx to change the sort order perf symbols: Fix arm64 gap between kernel start and module end perf build-test: Honour JOBS to override detection of number of cores perf script: Add --show-cgroup-events option perf top: Add --all-cgroups option perf record: Add --all-cgroups option perf record: Support synthesizing cgroup events perf report: Add 'cgroup' sort key perf cgroup: Maintain cgroup hierarchy perf tools: Basic support for CGROUP event ...

Merge tag 'spdx-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx

2020-04-03T20:12:26Z

Pull SPDX updates from Greg KH: "Here are three SPDX patches for 5.7-rc1. One fixes up the SPDX tag for a single driver, while the other two go through the tree and add SPDX tags for all of the .gitignore files as needed. Nothing too complex, but you will get a merge conflict with your current tree, that should be trivial to handle (one file modified by two things, one file deleted.) All three of these have been in linux-next for a while, with no reported issues other than the merge conflict" * tag 'spdx-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx: ASoC: MT6660: make spdxcheck.py happy .gitignore: add SPDX License Identifier .gitignore: remove too obvious comments