test(wasi) Running all WASI tests with wasmer_vfs::mem_fs too
#2546
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This PR updates how we generate the WASI test suites to test against the `wasmer_vfs::host_fs` (the default), and `wasmer_vfs::mem_fs` (that's new).
When opening a file with the `append` option turned on, all `seek` operations must be ignored. As described by [`open(2)`](https://man7.org/linux/man-pages/man2/open.2.html), the `O_APPEND` option describes this behavior well: > Before each write(2), the file offset is positioned at > the end of the file, as if with lseek(2). The > modification of the file offset and the write operation > are performed as a single atomic step. > > O_APPEND may lead to corrupted files on NFS filesystems > if more than one process appends data to a file at once. > This is because NFS does not support appending to a file, > so the client kernel has to simulate it, which can't be > done without a race condition. This patch implements that behavior. Also, this patch rewind the file cursor if opened in read-mode.
syrusakbary
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Aug 31, 2021
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2550: feat(vfs) Update `Metadata.len` when updating the file buffer r=Hywan a=Hywan # Description This patch updates `wasmer_vfs::mem_fs` to handle `Metadata.len` correctly. The `len` value is updated when something is written in the file buffer. `len` is also updated when the file is truncated (with open options) or when the file is update with `set_len`. It helps to fix one test in #2546. Co-authored-by: Ivan Enderlin <[email protected]>
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2551: feat(vfs) Add ability to rename a file with `mem_fs` r=Hywan a=Hywan # Description This patch updates `wasmer_vfs::mem_fs::FileSystem::rename` to handle file. Directories were handle previously, but not file. ~~Tests must be added though.~~ It solves the last bits of #2546. Co-authored-by: Ivan Enderlin <[email protected]>
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Description
This WIP PR updates our WASI test framework to specifically test with
wasmer_vfs::host_fs(the default, as of now) and withwasmer_vfs::mem_fs(🆕!).Bug trophies:
Metadata.lenwhen updating the file buffer #2550mem_fs#2551Review