SymbX/systemd
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

vmspawn: complain loudly if we can't prepare a unix socket for virtiofsd

Browse Source 
I couldn't convince vmspawn to start a VM on a Fedora image I just
downloaded, and it was pretty light on any useful details:

$ build/systemd-vmspawn --image ~/Downloads/Fedora-Server-Guest-Generic-Rawhide-20260627.n.0.x86_64.qcow2 --image-format=qcow2 --bind-ro=/tmp/bar; echo $?
░ Spawning VM Fedora-Server-Guest-Generic-Rawhide-20260627.n.0.x8664.qcow2 on /home/mrc0mmand/Downloads/Fedora-Server-Guest-Generic-Rawhide-20260627.n.0.x86_64.qcow2.
░ Press Ctrl-] three times within 1s to kill VM.
1

Turns out that the unix socket path vmspawn generates for the virtiofsd
socket is too long. Let's relay this information to the user as well to
make debugging this a little less painful:

$ build/systemd-vmspawn --image ~/Downloads/Fedora-Server-Guest-Generic-Rawhide-20260627.n.0.x86_64.qcow2 --image-format=qcow2 --bind-ro=/tmp/bar
░ Spawning VM Fedora-Server-Guest-Generic-Rawhide-20260627.n.0.x8664.qcow2 on /home/mrc0mmand/Downloads/Fedora-Server-Guest-Generic-Rawhide-20260627.n.0.x86_64.qcow2.
░ Press Ctrl-] three times within 1s to kill VM.
Failed to prepare unix socket '/run/user/1000/systemd/vmspawn/Fedora-Server-Guest-Generic-Rawhide-20260627.n.0.x8664.qcow2/sock-9594581dcf598992': File name too long
This commit is contained in:
Frantisek Sumsal
2026-06-28 12:52:02 +09:00
committed by Yu Watanabe
parent dc416f5825
commit 7804fd182c
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/vmspawn/vmspawn.c
+1 -1
View File
@@ -1719,7 +1719,7 @@ static int start_virtiofsd(
union sockaddr_union su;
r = sockaddr_un_set_path(&su.un, listen_address);
if (r < 0)
return r;
return log_error_errno(r, "Failed to prepare unix socket '%s': %m", listen_address);
_cleanup_close_ int sock = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0);
if (sock < 0)