Bug 1382695

Summary: [RFE 7.4] support for virtio-vsock - glibc
Product: Red Hat Enterprise Linux 7 Reporter: Ademar Reis <areis>
Component: glibcAssignee: glibc team <glibc-bugzilla>
Status: CLOSED NOTABUG QA Contact: qe-baseos-tools-bugs
Severity: medium Docs Contact:
Priority: high    
Version: 7.3CC: ashankar, fweimer, hannsj_uhl, huding, john.spray, juzhang, knoel, lijin, lmiksik, mnewsome, mtessun, mzhan, pfrankli, qzhang, ssaha, stefanha, virt-bugs, virt-maint, xfu, yzimmerm
Target Milestone: rcKeywords: FutureFeature
Target Release: 7.4   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Enhancement
Doc Text:
Story Points: ---
Clone Of: 1291282 Environment:
Last Closed: 2017-01-27 14:11:47 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1291282    
Bug Blocks: 1291284, 1291286, 1291851, 1294879, 1294880, 1294884, 1299988, 1315822, 1359843, 1363787, 1378137, 1415819, 1518995, 1518996, 1518997    

Description Ademar Reis 2016-10-07 12:43:32 UTC 
Description of problem:

We now have virtio-vsock support in QEMU/KVM, which implements a host/guest communication device, allowing applications from guest and host to communicate without the need of a network. It implements the POSIX Sockets API and supports both SOCK_STREAM and SOCK_DGRAM. VSOCK itself has been available in the linux kernel since 3.9.

We're trying to push glibc patches upstream to add AF_VSOCK support to getnameinfo(3) and getaddrinfo(3): https://sourceware.org/ml/libc-alpha/2016-09/msg00580.html

For virtio-vsock support in QEMU/kernel, see bug 1291282 and bug 1291284.

The primary use-case for this feature is Virt-FS, where we export a NFS mount to the guest without needing to setup a TCP/IP network. For NFS BZs, see bug 1291286 and bug 1294880.

It's also going to be required by Ceph in OpenStack, see bug 1363787.

+++ This bug was initially created as a clone of Bug #1291282 +++
Comment 1 Carlos O'Donell 2016-10-07 14:28:20 UTC 
Just to be clear, these changes need to land upstream before they can be considered acceptable in RHEL7.

I encourage everyone to continue the upstream discussion to reach consensus on a solution.
Comment 2 Stefan Hajnoczi 2017-01-27 14:11:47 UTC 
I am not pursuing this further.  After adding AF_VSOCK support to qemu-guest-agent, systemd, and nfs-utils without getaddrinfo(3) there is no immediate need for this change.