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Don't try locking the history file if mmap returns ENODEV

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If we try to memory map the history file, and we get back ENODEV meaning that
the underlying device does not support memory mapping, then treat that as a hint
that the filesystem is remote and disable history locking.
This commit is contained in:
Peter Ammon 2024-11-02 12:08:52 -07:00
parent 344b072e82
commit 23941ea9ca
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1 changed files with 9 additions and 1 deletions
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10
src/history/file.rs
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@ -130,7 +130,15 @@ impl HistoryFileContents {
let region = if should_mmap() {
match MmapRegion::map_file(file.as_raw_fd(), len) {
Ok(region) => region,
Err(err) if err.raw_os_error() == Some(ENODEV) => map_anon(file, len)?,
Err(err) if err.raw_os_error() == Some(ENODEV) => {
// Our mmap failed with ENODEV, which means the underlying
// filesystem does not support mapping. Treat this as a hint
// that the filesystem is remote, and so disable locks for
// the history file.
super::ABANDONED_LOCKING.store(true);
// Create an anonymous mapping and read() the file into it.
map_anon(file, len)?
}
Err(_err) => return None,
}
} else {