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vhost-user-fs: return correct result of fs_slave_io()

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Virtio-fs daemon expects fs_slave_io() returns the number of bytes
read/written on success, but we always return 0 and make userspace think
nothing has been read/written.

Fix it by returning the actual bytes read/written. Note that This
depends on the corresponding fix in vhost crate.

Fixes: #949
Signed-off-by: Eryu Guan <eguan@linux.alibaba.com>
This commit is contained in:
Eryu Guan
2020-03-24 19:54:17 +08:00
committed by Sebastien Boeuf
parent bbc385c3f3
commit 18fbd303ab
3 changed files with 15 additions and 12 deletions
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Cargo.lock generated
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@@ -1143,7 +1143,7 @@ dependencies = [
[[package]]
name = "vhost"
version = "0.1.0"
source = "git+https://github.com/cloud-hypervisor/vhost?branch=dragonball#af264bb39201b175607d7cc517ee2d90b8820dcc"
source = "git+https://github.com/cloud-hypervisor/vhost?branch=dragonball#92778e12aa9c9bd024ee81cd32a0a7f5ece03272"
dependencies = [
"bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
"libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",