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Re: svn_io_file_flush_to_disk fails on AFS filesystems on Darwin

From: Branko Čibej <brane_at_apache.org>
Date: Wed, 26 Jun 2019 17:48:56 +0200

On 26.06.2019 04:52, Quentin Smith wrote:
> Hi,
>
> svn_io_file_flush_to_disk in subversion/libsvn_subr/io.c fails to
> flush files on AFS filesystems on Darwin. The user-visible experience is:
>
> $ svn commit
> svn: E000025: Commit failed (details follow):
> svn: E000025: Can't write '/afs/path/db/txn-current' atomically
> svn: E000025: Can't flush file '/afs/path/db/svn-CNFY6N' to disk:
> Inappropriate ioctl for device
>
> This is because Darwin defines F_FULLFSYNC, which on AFS (and maybe
> other filesystems?) returns ENOTTY.
>
> The code ignores EINVAL with a comment about filesystems that don't
> support it; evidently on Darwin this also needs to include ENOTTY.
>
> (Also, I suspect it should fall back from fcntl to fsync, since I
> suspect fsync /does/ work on AFS filesystems.)
>
> I repro'd this with svn 1.10.3 (r1842928), but inspection of trunk
> confirms the code has not changed.

First of all, thanks for the repor.

Please provide a standalone reproduction script, using our command-line
client.

Last but not least, I do wish filesystems were consistent in their
implementation ... what on earth is ENOTTY doing here?

-- Brane
Received on 2019-06-26 17:49:08 CEST

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