commit bf8745c41d9169aac125f7f65482124496a28d72
author Brandon Castellano <bcastell@google.com> Mon Jan 30 20:42:14 2023 +0000
committer CQ Bot <fuchsia-internal-scoped@luci-project-accounts.iam.gserviceaccount.com> Mon Jan 30 20:42:14 2023 +0000
tree 101303cb483eb45eb79673fa1fea1564bc20b2ad
parent 940c114e0c4947a2ba466d93f4635f09c2c8f94b

[vfs][rust] Refactor VmoFile

Implement VmoFile in terms of File and remove duplicated connection
handling logic. Remove use of generics for VmoFile struct by using
dynamic dispatch for asynchronous construction via delegate trait.
This improves compile times and allows for both synchronous and
asynchronous use of VmoFile from the same type.

Allow construction of a VmoFile from an existing Vmo. Remove now
redundant ReadOnlyVmoFile.

Enforce seek offset consistency for files using the Rust VFS. This
ensures seeking past 2^64 - 1 bytes will result in OUT_OF_RANGE rather
than silent truncation. This behavior is still not consistent with that
defined in http://fxbug.dev/100754 but ensures the internal state
remains valid.

Bug: 99448
Test: fx test vfs-tests
  fuchsia-pkg://fuchsia.com/rustvfs-io1-conformance-test
Change-Id: I915e5ca25677be54d6bbe5905f8b770ec3a2b86c
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/679622
Reviewed-by: Tamir Duberstein <tamird@google.com>
Reviewed-by: Stephen Demos <sdemos@google.com>
Commit-Queue: Brandon Castellano <bcastell@google.com>