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vhost_user_fs: Add support for CopyFileRange

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Add support for the CopyFileRange request, introduced in FUSE 7.28.

Signed-off-by: Sergio Lopez <slp@redhat.com>
This commit is contained in:
Sergio Lopez
2020-03-20 14:08:26 +01:00
committed by Rob Bradford
parent b8cfdab8b6
commit 97e2d5d266
4 changed files with 121 additions and 0 deletions
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36
vhost_user_fs/src/server.rs
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@@ -124,6 +124,7 @@ impl<F: FileSystem + Sync> Server<F> {
x if x == Opcode::Readdirplus as u32 => self.readdirplus(in_header, r, w),
x if x == Opcode::Rename2 as u32 => self.rename2(in_header, r, w),
x if x == Opcode::Lseek as u32 => self.lseek(in_header, r, w),
x if x == Opcode::CopyFileRange as u32 => self.copyfilerange(in_header, r, w),
x if x == Opcode::SetupMapping as u32 => self.setupmapping(in_header, r, w, vu_req),
x if x == Opcode::RemoveMapping as u32 => self.removemapping(in_header, r, w, vu_req),
_ => reply_error(
@@ -1261,6 +1262,41 @@ impl<F: FileSystem + Sync> Server<F> {
Err(e) => reply_error(e, in_header.unique, w),
}
}
fn copyfilerange(&self, in_header: InHeader, mut r: Reader, w: Writer) -> Result<usize> {
let CopyfilerangeIn {
fh_in,
off_in,
nodeid_out,
fh_out,
off_out,
len,
flags,
..
} = r.read_obj().map_err(Error::DecodeMessage)?;
match self.fs.copyfilerange(
Context::from(in_header),
in_header.nodeid.into(),
fh_in.into(),
off_in,
nodeid_out.into(),
fh_out.into(),
off_out,
len,
flags,
) {
Ok(count) => {
let out = WriteOut {
size: count as u32,
..Default::default()
};
reply_ok(Some(out), None, in_header.unique, w)
}
Err(e) => reply_error(e, in_header.unique, w),
}
}
}
fn reply_ok<T: ByteValued>(