- 30 May, 2024 2 commits
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Kui-Feng Lee authored
Pass an additional pointer of bpf_struct_ops_link to callback function reg, unreg, and update provided by subsystems defined in bpf_struct_ops. A bpf_struct_ops_map can be registered for multiple links. Passing a pointer of bpf_struct_ops_link helps subsystems to distinguish them. This pointer will be used in the later patches to let the subsystem initiate a detachment on a link that was registered to it previously. Signed-off-by:
Kui-Feng Lee <thinker.li@gmail.com> Link: https://lore.kernel.org/r/20240530065946.979330-2-thinker.li@gmail.comSigned-off-by:
Martin KaFai Lau <martin.lau@kernel.org>
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Jakub Sitnicki authored
libbpf can deduce program type and attach type from the ELF section name. We don't need to pass it out-of-band if we switch to libbpf convention [1]. [1] https://docs.kernel.org/bpf/libbpf/program_types.htmlSigned-off-by:
Jakub Sitnicki <jakub@cloudflare.com> Signed-off-by:
Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20240522080936.2475833-1-jakub@cloudflare.com
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- 29 May, 2024 9 commits
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Andrii Nakryiko authored
Yafang Shao says: ==================== bpf: Add a generic bits iterator Three new kfuncs, namely bpf_iter_bits_{new,next,destroy}, have been added for the new bpf_iter_bits functionality. These kfuncs enable the iteration of the bits from a given address and a given number of bits. - bpf_iter_bits_new Initialize a new bits iterator for a given memory area. Due to the limitation of bpf memalloc, the max number of bits to be iterated over is (4096 * 8). - bpf_iter_bits_next Get the next bit in a bpf_iter_bits - bpf_iter_bits_destroy Destroy a bpf_iter_bits The bits iterator can be used in any context and on any address. Changes: - v7->v8: Refine the interface to avoid dealing with endianness (Andrii) - v6->v7: Fix endianness error for non-long-aligned data (Andrii) - v5->v6: Add positive tests (Andrii) - v4->v5: Simplify test cases (Andrii) - v3->v4: - Fix endianness error on s390x (Andrii) - zero-initialize kit->bits_copy and zero out nr_bits (Andrii) - v2->v3: Optimization for u64/u32 mask (Andrii) - v1->v2: Simplify the CPU number verification code to avoid the failure on s390x (Eduard) - bpf: Add bpf_iter_cpumask https://lwn.net/Articles/961104/ - bpf: Add new bpf helper bpf_for_each_cpu https://lwn.net/Articles/939939/ ==================== Link: https://lore.kernel.org/r/20240517023034.48138-1-laoar.shao@gmail.comSigned-off-by: -
Yafang Shao authored
Add test cases for the bits iter: - Positive cases - Bit mask representing a single word (8-byte unit) - Bit mask representing data spanning more than one word - The index of the set bit - Nagative cases - bpf_iter_bits_destroy() is required after calling bpf_iter_bits_new() - bpf_iter_bits_destroy() can only destroy an initialized iter - bpf_iter_bits_next() must use an initialized iter - Bit mask representing zero words - Bit mask representing fewer words than expected - Case for ENOMEM - Case for NULL pointer Signed-off-by:Yafang Shao <laoar.shao@gmail.com> Signed-off-by:
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Yafang Shao authored
Add three new kfuncs for the bits iterator: - bpf_iter_bits_new Initialize a new bits iterator for a given memory area. Due to the limitation of bpf memalloc, the max number of words (8-byte units) that can be iterated over is limited to (4096 / 8). - bpf_iter_bits_next Get the next bit in a bpf_iter_bits - bpf_iter_bits_destroy Destroy a bpf_iter_bits The bits iterator facilitates the iteration of the bits of a memory area, such as cpumask. It can be used in any context and on any address. Signed-off-by:
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Martin KaFai Lau authored
Geliang Tang says: ==================== This patchset uses post_socket_cb callbacks of struct network_helper_opts to refactor do_test() in bpf_tcp_ca.c. v5: - address Martin's comments in v4 (thanks) - add patch 4, use start_server_str in test_dctcp_fallback too - ASSERT_* is already used in settcpca, use this helper in cc_cb (patch 3). v4: - address Martin's comments in v3 (thanks). - drop 2 patches, keep "type" as the individual arg to start_server_addr, connect_to_addr and start_server_str. v3: - Add 4 new patches, 1-3 are cleanups. 4 adds a new helper. - address Martin's comments in v2. v2: - rebased on commit "selftests/bpf: Add test for the use of new args in cong_control" ==================== Signed-off-by: -
Geliang Tang authored
This patch uses new helper start_server_str() in do_test() in bpf_tcp_ca.c to accept a struct network_helper_opts argument instead of using start_server() and settcpca(). Then change the type of the first paramenter of do_test() into a struct network_helper_opts one. Define its own cb_opts and opts for each test, set its own cc name into cb_opts.cc, and cc_cb() into post_socket_cb callback, then pass it to do_test(). Signed-off-by:
Geliang Tang <tanggeliang@kylinos.cn> Link: https://lore.kernel.org/r/6e1b6555e3284e77c8aa60668c61a66c5f99aa37.1716638248.git.tanggeliang@kylinos.cnSigned-off-by:
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Geliang Tang authored
This patch uses start_server_str() helper in test_dctcp_fallback() in bpf_tcp_ca.c, instead of using start_server() and settcpca(). For support opts in start_server_str() helper, opts->cb_opts needs to be passed to post_socket_cb() in __start_server(). Signed-off-by:
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Geliang Tang authored
Since the post_socket_cb() callback is added in struct network_helper_opts, it's make sense to use it not only in __start_server(), but also in connect_to_fd_opts(). Then it can be used to set TCP_CONGESTION sockopt. Add a "void *" type member cb_opts into struct network_helper_opts, and add a new struct named cb_opts in prog_tests/bpf_tcp_ca.c, then cc can be moved into struct cb_opts from network_helper_opts. Define a new callback cc_cb() to set TCP_CONGESTION sockopt, and set it to post_socket_cb pointer of opts. Define a new cb_opts cubic, set it to cb_opts of opts. Pass this opts to connect_to_fd_opts() in test_dctcp_fallback(). Signed-off-by:
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Geliang Tang authored
It's a tech debt that start_server() does not take the "opts" argument. It's pretty handy to have start_server() as a helper that takes string address. So this patch creates a new helper start_server_str(). Then start_server() can be a wrapper of it. Signed-off-by:
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Geliang Tang authored
It's not possible to have one generic/common "struct post_socket_opts" for all tests. It's better to have the individual test define its own callback opts struct. So this patch drops struct post_socket_opts, and changes the second parameter of post_socket_cb as "void *" type. Signed-off-by:
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- 28 May, 2024 10 commits
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Mykyta Yatsenko authored
Configure logging verbosity by setting LIBBPF_LOG_LEVEL environment variable, which is applied only to default logger. Once user set their custom logging callback, it is up to them to handle filtering. Signed-off-by:
Mykyta Yatsenko <yatsenko@meta.com> Signed-off-by:
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https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextJakub Kicinski authored
Daniel Borkmann says: ==================== pull-request: bpf-next 2024-05-28 We've added 23 non-merge commits during the last 11 day(s) which contain a total of 45 files changed, 696 insertions(+), 277 deletions(-). The main changes are: 1) Rename skb's mono_delivery_time to tstamp_type for extensibility and add SKB_CLOCK_TAI type support to bpf_skb_set_tstamp(), from Abhishek Chauhan. 2) Add netfilter CT zone ID and direction to bpf_ct_opts so that arbitrary CT zones can be used from XDP/tc BPF netfilter CT helper functions, from Brad Cowie. 3) Several tweaks to the instruction-set.rst IETF doc to address the Last Call review comments, from Dave Thaler. 4) Small batch of riscv64 BPF JIT optimizations in order to emit more compressed instructions to the JITed image for better icache efficiency, from Xiao Wang. 5) Sort bpftool C dump output from BTF, aiming to simplify vmlinux.h diffing and forcing more natural type definitions ordering, from Mykyta Yatsenko. 6) Use DEV_STATS_INC() macro in BPF redirect helpers to silence a syzbot/KCSAN race report for the tx_errors counter, from Jiang Yunshui. 7) Un-constify bpf_func_info in bpftool to fix compilation with LLVM 17+ which started treating const structs as constants and thus breaking full BTF program name resolution, from Ivan Babrou. 8) Fix up BPF program numbers in test_sockmap selftest in order to reduce some of the test-internal array sizes, from Geliang Tang. 9) Small cleanup in Makefile.btf script to use test-ge check for v1.25-only pahole, from Alan Maguire. 10) Fix bpftool's make dependencies for vmlinux.h in order to avoid needless rebuilds in some corner cases, from Artem Savkov. * tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (23 commits) bpf, net: Use DEV_STAT_INC() bpf, docs: Fix instruction.rst indentation bpf, docs: Clarify call local offset bpf, docs: Add table captions bpf, docs: clarify sign extension of 64-bit use of 32-bit imm bpf, docs: Use RFC 2119 language for ISA requirements bpf, docs: Move sentence about returning R0 to abi.rst bpf: constify member bpf_sysctl_kern:: Table riscv, bpf: Try RVC for reg move within BPF_CMPXCHG JIT riscv, bpf: Use STACK_ALIGN macro for size rounding up riscv, bpf: Optimize zextw insn with Zba extension selftests/bpf: Handle forwarding of UDP CLOCK_TAI packets net: Add additional bit to support clockid_t timestamp type net: Rename mono_delivery_time to tstamp_type for scalabilty selftests/bpf: Update tests for new ct zone opts for nf_conntrack kfuncs net: netfilter: Make ct zone opts configurable for bpf ct helpers selftests/bpf: Fix prog numbers in test_sockmap bpf: Remove unused variable "prev_state" bpftool: Un-const bpf_func_info to fix it for llvm 17 and newer bpf: Fix order of args in call to bpf_map_kvcalloc ... ==================== Link: https://lore.kernel.org/r/20240528105924.30905-1-daniel@iogearbox.netSigned-off-by:Jakub Kicinski <kuba@kernel.org>
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Dr. David Alan Gilbert authored
Both lan78xx and smsc75xx have a 'usb_context' struct which is unused, since their original commits. Remove them. Signed-off-by:
Dr. David Alan Gilbert <linux@treblig.org> Link: https://lore.kernel.org/r/20240526205922.176578-1-linux@treblig.orgSigned-off-by:
Paolo Abeni <pabeni@redhat.com>
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Dr. David Alan Gilbert authored
'ne2k_pci_card' is unused since 2.3.99-pre3 in March 2000. Remove it. Signed-off-by:
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Dr. David Alan Gilbert authored
'mlx4_port_config was added by commit ab9c17a0 ("mlx4_core: Modify driver initialization flow to accommodate SRIOV for Ethernet") but remained unused. Remove it. Signed-off-by:
Tariq Toukan <tariqt@nvidia.com> Signed-off-by:
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Dr. David Alan Gilbert authored
'niclist' and 'oct_link_status_resp' are unused since the original commit f21fb3ed ("Add support of Cavium Liquidio ethernet adapters"). Remove them. Signed-off-by:
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Dr. David Alan Gilbert authored
'short_rx_done_desc' and 'basic_rx_done_desc' are unused since commit fdecea66 (" [netdrvr starfire] Add GPL'd firmware, remove compat code"). Remove them. Signed-off-by:
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Gou Hao authored
In commit cdfbabfb ("net: Work around lockdep limitation in sockets that use sockets"), it introduces 'af_kern_callback_keys' to lockdep-init of sk_callback_lock according to 'sk_kern_sock', it modifies sock_init_data() only, and sk_clone_lock() calls sk_init_common() to initialize sk_callback_lock too, so the lockdep-init of sk_callback_lock should be moved to sk_init_common(). Signed-off-by:
Gou Hao <gouhao@uniontech.com> Link: https://lore.kernel.org/r/20240526145718.9542-2-gouhao@uniontech.comSigned-off-by:
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Gou Hao authored
sk_callback_lock has already been initialized in sk_init_common(). Signed-off-by:
Breno Leitao <leitao@debian.org> Link: https://lore.kernel.org/r/20240526145718.9542-1-gouhao@uniontech.comSigned-off-by:
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yunshui authored
syzbot/KCSAN reported that races happen when multiple CPUs updating dev->stats.tx_error concurrently. Adopt SMP safe DEV_STATS_INC() to update the dev->stats fields. Reported-by:
syzbot <syzkaller@googlegroups.com> Signed-off-by:
yunshui <jiangyunshui@kylinos.cn> Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20240523033520.4029314-1-jiangyunshui@kylinos.cn
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- 27 May, 2024 1 commit
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Dr. David Alan Gilbert authored
'bf_ctx' appears unused since the original commit 960366cf ("Add mISDN DSP"). Remove it. Signed-off-by:
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- 26 May, 2024 1 commit
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Dave Thaler authored
The table captions patch corrected indented most tables to work with the table directive for adding a caption but missed two of them. Signed-off-by:
Dave Thaler <dthaler1968@gmail.com> Reviewed-by:
Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20240526061815.22497-1-dthaler1968@gmail.comSigned-off-by:
Alexei Starovoitov <ast@kernel.org>
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- 25 May, 2024 5 commits
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Dave Thaler authored
In the Jump instructions section it explains that the offset is "relative to the instruction following the jump instruction". But the program-local section confusingly said "referenced by offset from the call instruction, similar to JA". This patch updates that sentence with consistent wording, saying it's relative to the instruction following the call instruction. Signed-off-by:
Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20240525153332.21355-1-dthaler1968@gmail.comSigned-off-by:
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Dave Thaler authored
As suggested by Ines Robles in his IETF GENART review at https://datatracker.ietf.org/doc/review-ietf-bpf-isa-02-genart-lc-robles-2024-05-16/Signed-off-by:
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Dave Thaler authored
imm is defined as a 32-bit signed integer. {MOV, K, ALU64} says it does "dst = src" (where src is 'imm') and it does do dst = (s64)imm, which in that sense does sign extend imm. The MOVSX instruction is explained as sign extending, so added the example of {MOV, K, ALU64} to make this more clear. {JLE, K, JMP} says it does "PC += offset if dst <= src" (where src is 'imm', and the comparison is unsigned). This was apparently ambiguous to some readers as to whether the comparison was "dst <= (u64)(u32)imm" or "dst <= (u64)(s64)imm" so added an example to make this more clear. v1 -> v2: Address comments from Yonghong Signed-off-by:Dave Thaler <dthaler1968@googlemail.com> Acked-by:
David Vernet <void@manifault.com> Link: https://lore.kernel.org/r/20240520215255.10595-1-dthaler1968@gmail.comSigned-off-by:
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Dave Thaler authored
Per IETF convention and discussion at LSF/MM/BPF, use MUST etc. keywords as requested by IETF Area Director review. Also as requested, indicate that documenting BTF is out of scope of this document and will be covered by a separate IETF specification. Added paragraph about the terminology that is required IETF boilerplate and must be worded exactly as such. Signed-off-by:
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Dave Thaler authored
As discussed at LSF/MM/BPF, the sentence about using R0 for returning values from calls is part of the calling convention and belongs in abi.rst. Any further additions or clarifications to this text are left for future patches on abi.rst. The current patch is simply to unblock progression of instruction-set.rst to a standard. In contrast, the restriction of register numbers to the range 0-10 is untouched, left in the instruction-set.rst definition of the src_reg and dst_reg fields. Signed-off-by:
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- 24 May, 2024 4 commits
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Thomas Weißschuh authored
The sysctl core is preparing to only expose instances of struct ctl_table as "const". This will also affect the ctl_table argument of sysctl handlers, for which bpf_sysctl_kern::table is also used. As the function prototype of all sysctl handlers throughout the tree needs to stay consistent that change will be done in one commit. To reduce the size of that final commit, switch this utility type which is not bound by "typedef proc_handler" to "const struct ctl_table". No functional change. Signed-off-by:
Thomas Weißschuh <linux@weissschuh.net> Signed-off-by:
Joel Granados <j.granados@samsung.com> Link: https://lore.kernel.org/bpf/20240518-sysctl-const-handler-bpf-v1-1-f0d7186743c1@weissschuh.net
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Xiao Wang authored
We could try to emit compressed insn for reg move operation during CMPXCHG JIT, the instruction compression has no impact on the jump offsets of following forward and backward jump instructions. Signed-off-by:
Xiao Wang <xiao.w.wang@intel.com> Signed-off-by:
Björn Töpel <bjorn@kernel.org> Link: https://lore.kernel.org/bpf/20240519050507.2217791-1-xiao.w.wang@intel.com
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Xiao Wang authored
Use the macro STACK_ALIGN that is defined in asm/processor.h for stack size rounding up, just like bpf_jit_comp32.c does. Signed-off-by:
Pu Lehui <pulehui@huawei.com> Link: https://lore.kernel.org/bpf/20240523031835.3977713-1-xiao.w.wang@intel.com
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Xiao Wang authored
The Zba extension provides add.uw insn which can be used to implement zext.w with rs2 set as ZERO. Signed-off-by:
Andrew Jones <ajones@ventanamicro.com> Reviewed-by:
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- 23 May, 2024 8 commits
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Martin KaFai Lau authored
Abhishek Chauhan says: ==================== Patch 1 :- This patch takes care of only renaming the mono delivery timestamp to tstamp_type with no change in functionality of existing available code in kernel also Starts assigning tstamp_type with either mono or real and introduces a new enum in the skbuff.h, again no change in functionality of the existing available code in kernel , just making the code scalable. Patch 2 :- Additional bit was added to support tai timestamp type to avoid tstamp drops in the forwarding path when testing TC-ETF. Patch is also updating bpf filter.c Some updates to bpf header files with introduction to BPF_SKB_CLOCK_TAI and documentation updates stating deprecation of BPF_SKB_TSTAMP_UNSPEC and BPF_SKB_TSTAMP_DELIVERY_MONO Patch 3:- Handles forwarding of UDP packets with TAI clock id tstamp_type type with supported changes for tc_redirect/tc_redirect_dtime to handle forwarding of UDP packets with TAI tstamp_type ==================== Signed-off-by: -
Abhishek Chauhan authored
With changes in the design to forward CLOCK_TAI in the skbuff framework, existing selftest framework needs modification to handle forwarding of UDP packets with CLOCK_TAI as clockid. Signed-off-by:
Abhishek Chauhan <quic_abchauha@quicinc.com> Reviewed-by:
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Abhishek Chauhan authored
tstamp_type is now set based on actual clockid_t compressed into 2 bits. To make the design scalable for future needs this commit bring in the change to extend the tstamp_type:1 to tstamp_type:2 to support other clockid_t timestamp. We now support CLOCK_TAI as part of tstamp_type as part of this commit with existing support CLOCK_MONOTONIC and CLOCK_REALTIME. Signed-off-by:
Willem de Bruijn <willemb@google.com> Reviewed-by:
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Abhishek Chauhan authored
mono_delivery_time was added to check if skb->tstamp has delivery time in mono clock base (i.e. EDT) otherwise skb->tstamp has timestamp in ingress and delivery_time at egress. Renaming the bitfield from mono_delivery_time to tstamp_type is for extensibilty for other timestamps such as userspace timestamp (i.e. SO_TXTIME) set via sock opts. As we are renaming the mono_delivery_time to tstamp_type, it makes sense to start assigning tstamp_type based on enum defined in this commit. Earlier we used bool arg flag to check if the tstamp is mono in function skb_set_delivery_time, Now the signature of the functions accepts tstamp_type to distinguish between mono and real time. Also skb_set_delivery_type_by_clockid is a new function which accepts clockid to determine the tstamp_type. In future tstamp_type:1 can be extended to support userspace timestamp by increasing the bitfield. Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netLinus Torvalds authored
Pull networking fixes from Paolo Abeni: "Quite smaller than usual. Notably it includes the fix for the unix regression from the past weeks. The TCP window fix will require some follow-up, already queued. Current release - regressions: - af_unix: fix garbage collection of embryos Previous releases - regressions: - af_unix: fix race between GC and receive path - ipv6: sr: fix missing sk_buff release in seg6_input_core - tcp: remove 64 KByte limit for initial tp->rcv_wnd value - eth: r8169: fix rx hangup - eth: lan966x: remove ptp traps in case the ptp is not enabled - eth: ixgbe: fix link breakage vs cisco switches - eth: ice: prevent ethtool from corrupting the channels Previous releases - always broken: - openvswitch: set the skbuff pkt_type for proper pmtud support - tcp: Fix shift-out-of-bounds in dctcp_update_alpha() Misc: - a bunch of selftests stabilization patches" * tag 'net-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (25 commits) r8169: Fix possible ring buffer corruption on fragmented Tx packets. idpf: Interpret .set_channels() input differently ice: Interpret .set_channels() input differently nfc: nci: Fix handling of zero-length payload packets in nci_rx_work() net: relax socket state check at accept time. tcp: remove 64 KByte limit for initial tp->rcv_wnd value net: ti: icssg_prueth: Fix NULL pointer dereference in prueth_probe() tls: fix missing memory barrier in tls_init net: fec: avoid lock evasion when reading pps_enable Revert "ixgbe: Manual AN-37 for troublesome link partners for X550 SFI" testing: net-drv: use stats64 for testing net: mana: Fix the extra HZ in mana_hwc_send_request net: lan966x: Remove ptp traps in case the ptp is not enabled. openvswitch: Set the skbuff pkt_type for proper pmtud support. selftest: af_unix: Make SCM_RIGHTS into OOB data. af_unix: Fix garbage collection of embryos carrying OOB with SCM_RIGHTS tcp: Fix shift-out-of-bounds in dctcp_update_alpha(). selftests/net: use tc rule to filter the na packet ipv6: sr: fix memleak in seg6_hmac_init_algo af_unix: Update unix_sk(sk)->oob_skb under sk_receive_queue lock. ...
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git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-traceLinus Torvalds authored
Pull tracing fixes from Steven Rostedt: "Minor last minute fixes: - Fix a very tight race between the ring buffer readers and resizing the ring buffer - Correct some stale comments in the ring buffer code - Fix kernel-doc in the rv code - Add a MODULE_DESCRIPTION to preemptirq_delay_test" * tag 'trace-fixes-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: rv: Update rv_en(dis)able_monitor doc to match kernel-doc tracing: Add MODULE_DESCRIPTION() to preemptirq_delay_test ring-buffer: Fix a race between readers and resize checks ring-buffer: Correct stale comments related to non-consuming readers -
git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-traceLinus Torvalds authored
Pull tracing tool fix from Steven Rostedt: "Fix printf format warnings in latency-collector. Use the printf format string with %s to take a string instead of taking in a string directly" * tag 'trace-tools-v6.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: tools/latency-collector: Fix -Wformat-security compile warns
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Linus Torvalds authored
Merge tag 'trace-assign-str-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace Pull tracing cleanup from Steven Rostedt: "Remove second argument of __assign_str() The __assign_str() macro logic of the TRACE_EVENT() macro was optimized so that it no longer needs the second argument. The __assign_str() is always matched with __string() field that takes a field name and the source for that field: __string(field, source) The TRACE_EVENT() macro logic will save off the source value and then use that value to copy into the ring buffer via the __assign_str(). Before commit c1fa617c ("tracing: Rework __assign_str() and __string() to not duplicate getting the string"), the __assign_str() needed the second argument which would perform the same logic as the __string() source parameter did. Not only would this add overhead, but it was error prone as if the __assign_str() source produced something different, it may not have allocated enough for the string in the ring buffer (as the __string() source was used to determine how much to allocate) Now that the __assign_str() just uses the same string that was used in __string() it no longer needs the source parameter. It can now be removed" * tag 'trace-assign-str-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: tracing/treewide: Remove second parameter of __assign_str()
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