This commit refactors the handling of /proc/$pid/maps since the
collection previously assumed that all entries here could be
representeted in a HashMap. Those with a path component are stored
in a HashMap for fast lookup via library name. All other entries
are cached in a Vec to allow for filtering based on offsets, required
for supporting USDT probes.
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
Following the lead of crates like tokio and nix, we now annotate APIs
that require optional features. This helps in cases where a user wants
to have an `AsyncPerfEventArray` which is documented on crates.io, but
it's not obvious that you have to enable the `async` feature.
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
`override_syscall` performs integer-to-pointer conversion. This is
considered harmful on the newest Rust nightly which provides
`ptr::from_exposed_addr`, but there is no other way on Rust stable than
doing `as *const T`, which is what miri is unhappy about.
Signed-off-by: Michal Rostecki <vadorovsky@gmail.com>
Add BpfLoader::set_max_entries, which sets the max_entries for the
specified map, as the load-time option.
The max_entries set at map initialization in the ebpf component can be
overwritten by this method called on the userspace component.
If you want to set max_entries for multiple maps in an ebpf component,
you can do so by calling set_max_entries in the form of a method chain.
Fixes: #308
Refs: #292
Add `from_pinned` to allow loading BPF maps
from pinned points in the bpffs and
`from_fd` to allow loading BPF maps from
RawFds aquired via some other means eg
a unix socket.
These functions return an
aya::Map which has not been used previously
but will be the future abstraction once
all bpf maps are represented as an enum.
Signed-off-by: Andrew Stoycos <astoycos@redhat.com>
This commit fixes a bug and adds some missing lifecycle APIs.
1. Adds PinnedLink::from_path to create a pinned link from bpffs
2. Adds From<PinnedLink> for FdLink to allow for ^ to be converted
3. Adds From<FdLink> for XdpLink
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
Files changed:\nM aya/src/generated/linux_bindings_aarch64.rs
M aya/src/generated/linux_bindings_armv7.rs
M aya/src/generated/linux_bindings_riscv64.rs
M aya/src/generated/linux_bindings_x86_64.rs
Files changed:\nM aya/src/generated/btf_internal_bindings.rs
M aya/src/generated/linux_bindings_aarch64.rs
M aya/src/generated/linux_bindings_armv7.rs
M aya/src/generated/linux_bindings_riscv64.rs
M aya/src/generated/linux_bindings_x86_64.rs
M bpf/aya-bpf-bindings/src/aarch64/bindings.rs
M bpf/aya-bpf-bindings/src/aarch64/helpers.rs
M bpf/aya-bpf-bindings/src/armv7/bindings.rs
M bpf/aya-bpf-bindings/src/armv7/helpers.rs
M bpf/aya-bpf-bindings/src/riscv64/bindings.rs
M bpf/aya-bpf-bindings/src/riscv64/helpers.rs
M bpf/aya-bpf-bindings/src/x86_64/bindings.rs
M bpf/aya-bpf-bindings/src/x86_64/helpers.rs
This commit removes reliance on generated BtfType structs, as
well as adding a dedicated struct for each BTF type. As such,
we can now add nice accessors like `bits()` and `encoding()`
for Int vs. inlined shift/mask operations.
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
1. Removes OwnedLink
2. Allows Links to be converted into FdLink
3. Introduces a PinnedLink type to handle wrap FdLink when pinned and
support un-pinning
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
This allows for FdLinks to also be pinned to BpfFs.
In order for it to be called, the user would first call
`take_link` to get the underlying link. This can then
be destructured to an FdLink where FdLink::pin() may be called.
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
This allows for `pin` to be called as `Xdp::pin()` or
Program::pin() - the same way that unload() can be used.
This simplifies the use of this API.
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
This commit allows for BTF maps in the .maps ELF section to be parsed.
It reads the necessary information from the BTF section of the ELF file.
While the btf_ids of Keys and Values types are stored, they are not (yet)
used.
When creating a BTF map, we pass the btf_key_type_id and
btf_value_type_id.
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
Kernels before 5.11 don't use cgroup accounting, so they might reach the
RLIMIT_MEMLOCK when creating maps. After this change, we raise a warning
recommending to raise the RLIMIT_MEMLOCK.
This allows for Extension programs already loaded to the kernel to be
attached to another program that is BTF-compatible with the one provided
at `load()` time
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
This removes the ProgramFd trait with a struct that wraps a RawFd.
Program::fd() has been implemented as well as fd() for each Program
Type. This allows for a better API than requiring the use of the
ProgramFd trait.
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
Dave Tucker
Michal Rostecki
abhijeetbhagat
aztecher
Andrew Stoycos
Alessandro Decina
conectado
dave-tucker
Andre Fredette
dependabot[bot]