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Commit Graph

65 Commits (c010505f193086e5a5abc4a99494a5f74cf994b4)

Author SHA1 Message Date
Dave Tucker 19af2497d7 aya-bpf: Fix XDP Map documentation 
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
 9 months ago
Andrew Werner e2cf734490 aya: Implement RingBuf 
This implements the userspace binding for RingBuf.

Instead of streaming the samples as heap buffers, the process_ring
function takes a callback to which we pass the event's byte region,
roughly following [libbpf]'s API design. This avoids a copy and allows
marking the consumer pointer in a timely manner.

[libbpf]: https://github.com/libbpf/libbpf/blob/master/src/ringbuf.c

Additionally, integration tests are added to demonstrate the usage
of the new APIs and to ensure that they work end-to-end.

Co-authored-by: William Findlay <william@williamfindlay.com>
Co-authored-by: Tatsuyuki Ishi <ishitatsuyuki@gmail.com>
 11 months ago
Tamir Duberstein d16e607fd4
rustfmt: group_imports = "StdExternalCrate" 
High time we stop debating this; let the robots do the work.
 12 months ago
Tuetuopay 0edc13b4d4 bpf: add a shared try_redirect_map function for XDP maps 1 year ago
Tuetuopay 579e3cee22 aya, bpf: misc fixes following review comments 1 year ago
Tuetuopay 63ce2f013a bpf/devmap: don't expose `bpf_devmap_value` 
Use our own type that:
- is stable as not from bindgen
- does not have an union inside
 1 year ago
Tuetuopay 9ed1d3d281 bpf: add documentation for XDP maps 1 year ago
Tuetuopay db49633073 bpf: make xdp maps functions safe 
Values in those map are small enough to return copied values instead of
reference to values.
 1 year ago
Tuetuopay 0647927e32 xdp: add support for chained xdp programs in {cpu,dev}map 
set/insert functions can now take an optional bpf program fd to run once
the packet has been redirected from the main probe
 1 year ago
Tuetuopay ad3087d7eb bpf: Update XDP maps implementation 
The implementation changed since the original commit was written, and
some mistakes went in:
- missing bpf_redirect_map wrapper
- extra bpf_map_lookup_elem on maps for which it is forbidden
 1 year ago
Dave Tucker e90d521a21 bpf: Implement XDP maps 
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
 1 year ago
Tamir Duberstein 4fef255823
disallow (some) as conversions 
See https://rust-lang.github.io/rust-clippy/master/#/as_conversions.
 1 year ago
Michal Rostecki 33baf7ef22 aya-bpf/maps: Add `get_ptr` and `get_mut_ptr` methods to Array 
Signed-off-by: Michal Rostecki <vadorovsky@gmail.com>
 2 years ago
Ricky Han fbfbedb6a8 cargo fmt 2 years ago
Ricky Han e9ec257328 Add test case 2 years ago
Hengqi Chen e12e8a9ded aya-bpf/maps: Create LPMTrie with BPF_F_NO_PREALLOC 
The Linux kernel requires BPF_F_NO_PREALLOC on creating LPMTrie ([0]).
Add BPF_F_NO_PREALLOC flag in LPMTrie constructor.

Closes #332.

  [0]: https://github.com/torvalds/linux/blob/9e6b19a66d9b/kernel/bpf/lpm_trie.c#L551

Signed-off-by: Hengqi Chen <chenhengqi@outlook.com>
 2 years ago
Gabi 14bad9ba92
aya-bpf: minor fix lpm_trie::key docs 2 years ago
Dave Tucker 6ab7148731 bpf: Only use never type with rust nightly 
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
 2 years ago
Michal Rostecki ee15fbbbc5 bpf: Use `then_some` instead of `then(|| [...])` 
This change fixes the `unnecessary_lazy_evaluations` clippy warning.

Signed-off-by: Michal Rostecki <vadorovsky@gmail.com>
 2 years ago
tirex 741c35f555 Restore previous check for bpf_get_stackid 2 years ago
tirex 42c4d5c3af Temporary change return value condition to avoid problems with possibly (not aware) cast from int to long 2 years ago
tirex 5b1a3ed866 Fix return value for map removing/deleting 2 years ago
Tatsuyuki Ishi 5e24cf7a29
bpf: Remove unnecessary Sync bound on PerCpuArray<T> 2 years ago
Alessandro Decina 82cd3e695a ebpf: PerCpuArray: remove get_mut() and add get_ptr() and get_ptr_mut() 
get_mut() wasn't sound as it allowed creating multiple mutable
references.
 2 years ago
Tatsuyuki Ishi 41c6b56142 bpf: Replace map types to use &self, remove HashMap::get_mut 
The bpf_map_defs are now wrapped with UnsafeCell, which also happens to
provide a cozy way to get a *mut pointer. An UnsafeCell isn't strictly
required as the struct fields are practically opaque to us, but using an
UnsafeCell follows the general best practices against miscompilation and
also prevents some obvious errors.

HashMap::get_mut was removed because the idea is completely unsound.
Previous users should wrap their data with UnsafeCell instead or use
atomics.

Closes: https://github.com/aya-rs/aya/issues/233
 2 years ago
Alessandro Decina 16337001e4
Merge pull request #286 from nak3/add-BPF_MAP_TYPE_BLOOM_FILTER 
Add support for BPF_MAP_TYPE_BLOOM_FILTER
 2 years ago
Kenjiro Nakayama c5d5695a71 Add missing BPF_MAP_TYPE_STACK in BPF code 
Currently BPF_MAP_TYPE_STACK is supported by user code (`aya/src/maps/stack.rs`),
but it does not support the BPF_MAP_TYPE_STACK BPF code.

This patch fixes it.
 2 years ago
Dave Tucker 74704c3b28 bpf: Support BPF_PROG_TYPE_SK_LOOKUP 
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
 2 years ago
Kenjiro Nakayama c4262f793d Add support for BPF_MAP_TYPE_BLOOM_FILTER 
This patch adds support for `BPF_MAP_TYPE_BLOOM_FILTER`.
 2 years ago
Dave Tucker 4a32e7d985 clippy: fix new lints on nightly 
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
 2 years ago
Alessandro Decina ecd6a6e96b bpf: hash_map: add get_mut() method 3 years ago
Nimrod Shneor d0b6daa091 Add LPMTrie Map to aya-bpf for BPF programs 3 years ago
William Findlay df26fd94a7
bpf/program_array: use never type, add unsafe flag, and document safety 3 years ago
William Findlay ff14493751
bpf/maps: implement ProgramArray 
This PR implements the ProgramArray map type in aya-bpf. Includes a convenient tail_call
method that wraps the bpf_tail_call helper.
 3 years ago
Thia Wyrod b655cf973f
aya-bpf: remove unnecessary unsafe markers on map functions. 
Map lookup and deletion can yield stale keys and values by virtue of
sharing a data structure with userspace programs and other BPF programs
which can modify it. However, all accesses remain perfectly safe and will
not cause memory corruption or data races.
 3 years ago
Alessandro Decina 8043451973 bpf: re-export Lru hash maps from aya_bpf::maps 3 years ago
Alessandro Decina c0f695c4b6 bpf: Add LruHashMap and LruPerCpuHashMap 3 years ago
Dave Tucker 8a6fe4a640 bpf: Rename SkSkbContext to SkBuffContext 
This is necessary since the context is used in many other program types
and not just in SK_SKB programs.

Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
 3 years ago
Dave Tucker 2a8ba55b7e bpf: Implement redirect for skbs on sockmap/sockhash 
This implements redirect_skb and renames redirect to redirect_msg

Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
 3 years ago
Alessandro Decina 4116442cda bpf: PerfEventByteArray: remove unused import 3 years ago
Alessandro Decina 0220a4192c bpf: add PerfEventByteArray 
Similar to PerfEventArray but allows to output variable length byte
slices
 3 years ago
Alessandro Decina 23a70382b2 bpf: PerfEventArray: tweak output API 3 years ago
Alessandro Decina ea91fe08d3 bpf: rename PerfMap to PerfEventArray 3 years ago
Dave Tucker 69041954cb bpf: Added pinned constructor to maps 
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
 3 years ago
Alessandro Decina 269be03a89 bpf: add PerCpuArray 3 years ago
Alessandro Decina a68ff47246 aya-bpf, aya-bpf-bindings: fix clippy lints 3 years ago
Tw 55ba0538f2
bpf: add support for tracepoint program (#29) 
This patch add initial support for tracepoint program type.
Hope you enjoy.

Signed-off-by: Tw <wei.tan@intel.com>
 3 years ago
Tw d1b7b024dc bpf: fix a minor bug due to stackid allocation 
The type casting introduces an allocation, this will cause compiling failure when linking final bpf target.
So remove this casting to fix this issue.

BTW, the following is the failure I met:

= note: 07:24:12 [ERROR] fatal error: "unable to allocate function return #1"
          PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace.
          Stack dump:
          0.    Running pass 'Function Pass Manager' on module 'trace_bpf-001a275b17e9eb12'.
          1.    Running pass 'BPF DAG->DAG Pattern Instruction Selection' on function '@_ZN7aya_bpf4maps11stack_trace10StackTrace11get_stackid17h32b649bc3780c0aaE'

Signed-off-by: Tw <wei.tan@intel.com>
 3 years ago
Tw fd20bd5e23 bpf: add support for STACK_TRACE map 
This path support initial support for BPF_MAP_TYPE_STACK_TRACE.

Signed-off-by: Tw <wei.tan@intel.com>
 3 years ago
Alessandro Decina 122a5306e7 aya, aya-bpf-bindings: regenerate bindings 3 years ago