rust: pin-init: internal: pin_data: complete invariant borrow support

Non-covariant types can already be accessed inside projections. As
projections are only generated for `Pin<&mut T>`, they're not

rust: pin-init: internal: pin_data: complete invariant borrow support

Non-covariant types can already be accessed inside projections. As
projections are only generated for `Pin<&mut T>`, they're not accessible
otherwise. Add `with_{field_name}` methods so fields can be accessed using
closures with just `&T`.

Acked-by: Benno Lossin <lossin@kernel.org>
Link: https://patch.msgid.link/20261008-dev-selfref-v2-17-e280b3c8fba5@garyguo.net/
Signed-off-by: Gary Guo <gary@garyguo.net>

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rust: pin-init: internal: pin_data: support mutable borrows

Allow fields to be mutably referenced by other fields in addition to shared
references. In order for this to be sound, the fields that can

rust: pin-init: internal: pin_data: support mutable borrows

Allow fields to be mutably referenced by other fields in addition to shared
references. In order for this to be sound, the fields that can be mutably
borrowed are blocked from being accessed via field access syntax or
projection to maintain the aliasing requirements.

Acked-by: Benno Lossin <lossin@kernel.org>
Link: https://patch.msgid.link/20261008-dev-selfref-v2-14-e280b3c8fba5@garyguo.net/
Signed-off-by: Gary Guo <gary@garyguo.net>

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rust: pin-init: internal: pin_data: enable self-referential support

Enable self-referential support, and add example and test cases.

Acked-by: Benno Lossin <lossin@kernel.org>
Link: https://patch.m

rust: pin-init: internal: pin_data: enable self-referential support

Enable self-referential support, and add example and test cases.

Acked-by: Benno Lossin <lossin@kernel.org>
Link: https://patch.msgid.link/20261008-dev-selfref-v2-11-e280b3c8fba5@garyguo.net/
Signed-off-by: Gary Guo <gary@garyguo.net>

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