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Commit Graph

93 Commits (0786afa9ca70458c9f456754f24840ab1ef29c43)

Author SHA1 Message Date
Dave Tucker 05c1586202 bpf: bpf_probe_read_kernel fields in pt_regs 
As it turns out, the verifier gets upset if you try to read the values
directly without using bpf_probe_read.

Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
 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
Alessandro Decina 1eb9ef5488
Merge pull request #290 from ishitatsuyuki/immut-self 
bpf: Replace map types to use &self, remove HashMap::get_mut
 2 years ago
Dave Tucker 9d18a48c3c bpf: Add accessors to SockOpsContext 
Allow getting family, remote/local v4/v6 addresses and the remote and
local ports.

Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
 2 years ago
Dave Tucker c725e72796 bpf: re-reun build.rs if env changed 
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
 2 years ago
Dave Tucker e3c8c659a1 bpf: arm fix pt_regs handling 
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
 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
Dave Tucker 218d4842d6 bpf: Be consistent with arm target_arch 
This is `arm` in bindings but `armv7` in args.
Let's use `arm`

Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
 2 years ago
Dave Tucker 7f6da53c34 bpf: Fix pt_regs for aarch64 (again) 
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
 2 years ago
Dave Tucker 1d06b41e57 ci: Test all architectures 
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
 2 years ago
Dave Tucker 7e828df1c9 bpf: Fix aarch64 access to regs 
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
 2 years ago
Alessandro Decina 6b1f47323b
Merge pull request #293 from dave-tucker/getters-be-gone 
Getters be gone
 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 8672ff6c56 bpf: Remove generated getters 
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
 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 4acd996cb8 bpf: Add PtRegs wrapper 
This adds a portable wrapper around pt_regs and user_pt_regs.
It makes writing Raw Tracepoint or KProbe programs easier when the
arguments are one of these types while also ensuring code is portable
across architectures

Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
 2 years ago
Dave Tucker 4a32e7d985 clippy: fix new lints on nightly 
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
 3 years ago
Michal Rostecki 3262f85925 bpf(doc): Hide docs of bindings 
Before this change, documentation of helper functions (defined by us,
not bindings) were not visible, because `use gen::*` was overriding them
with helpers coming from aya-bpf-bindings, which have the same names and
no docs.

Signed-off-by: Michal Rostecki <vadorovsky@gmail.com>
 3 years ago
Kenjiro Nakayama e68d734c68
Add support for BPF_PROG_TYPE_CGROUP_SOCKOPT (#268) 3 years ago
Dave Tucker 2bac924464 bpf: Add support for BPF_PROG_TYPE_CGROUP_SOCK_ADDR 
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
 3 years ago
Kenjiro Nakayama f721021a0a
Add support for BPF_PROG_TYPE_CGROUP_SYSCTL (#256) 
* Add support for BPF_PROG_TYPE_CGROUP_SYSCTL

This patch adds support for `BPF_PROG_TYPE_CGROUP_SYSCTL`.

* Parse unnamed macro

* Fix docs
 3 years ago
tirex f1f7185dab Set skb_buff visbility to pub 3 years ago
Kenjiro Nakayama 80913c04f3 Fix minor typo 3 years ago
Alessandro Decina 29d539751a ebpf: add fallback memcpy 
Add simplest possible memcpy that the verifier should never trip on
 3 years ago
Alessandro Decina f75d968657
Merge pull request #239 from nak3/pub-ops 
aya-bpf: expose bpf_sock_ops of SockOpsContext
 3 years ago
Kenjiro Nakayama 360560ec4e aya-bpf: expose sk_msg_md of SkMsgContext 
This patch expose sk_msg_md of SkMsgContext.
 3 years ago
Kenjiro Nakayama 6bc5a4d82d aya-bpf: expose bpf_sock_ops of SockOpsContext 
This patch expose bpf_sock_ops of `SockOpsContext`.
 3 years ago
Alessandro Decina 5390fb1ee1
Merge pull request #187 from vadorovsky/sk-buff-socket-uid 
bpf: sk_buff: Add get_socket_uid method to SkBuffContext
 3 years ago
Michal Rostecki 34d74fcd3b bpf: sk_buff: Add get_socket_uid method to SkBuffContext 
This change exposes the BPF helper bpf_socket_get_uid as a public method
of SkBuffContext, which allows to get the owner UID of the socket
associated to the sk_buff stored in the context.

Signed-off-by: Michal Rostecki <vadorovsky@gmail.com>
 3 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
Alessandro Decina 923cd9b767
Merge pull request #142 from vadorovsky/args-mut-ptr 
aya-bpf: Add bpf_probe_write_user helper
 3 years ago
Michal Rostecki 1df3b17d29 aya-bpf: Add bpf_probe_write_user helper 
This helper allows to write to mutable pointers in the userspace, which
come from userspace functions that uprobes attach to.

Signed-off-by: Michal Rostecki <mrostecki@opensuse.org>
 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
Michal Rostecki 54377b6140 aya-bpf: Allow to convert probe arguments to mutable pointers 
Before this change, arguments fetched with `arg` from `ProbeContext`
could be only fetched as const pointers. This change allows to get mut
pointers as well.

Signed-off-by: Michal Rostecki <mrostecki@opensuse.org>
 3 years ago
Michal Rostecki 7e2fcd1d6d Support for fentry and fexit programs 
fentry and fexit programs are similar to kprobe and kretprobe, but they
are newer and they have practically zero overhead to call before or
after kernel function. Also, fexit programs are focused on access to
arguments rather than the return value.

Those kind of programs were introduced in the following patchset:

https://lwn.net/Articles/804112/

Signed-off-by: Michal Rostecki <mrostecki@opensuse.org>
 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
Thia Wyrod d280b856bd
aya-bpf: expose xdp_md of XdpContext and add metadata functions. 3 years ago
Dan Everton fa23052e34
Add wrapper and docs for for bpf_get_current_uid_gid 3 years ago
Alessandro Decina 170e98e71e bpf: fix doc tests 3 years ago
Alessandro Decina 31f96450d4 bpf: add bpf_probe_read_buf, bpf_probe_read_user_buf and bpf_probe_read_kernel_buf 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
William Findlay 89dee1a114
aya-bpf: implement argument coercion for pt_regs and BTF programs 
Implements argument and return value coercion helpers for:
    - LSM programs
    - BTF tracepoints
    - [ku]{ret}probes

Signed-off-by: William Findlay <william@williamfindlay.com>
 3 years ago