[Qemu-devel] [Bug 1470170] Re: Unsupported syscalls 370 and 355

[Peter Maydell]

Syscall 370 is name_to_handle_at, and 355 is signalfd4. (Likely if
name_to_handle_at succeeds then it'll want open_by_handle_at too.)

This patch implements the signalfd syscalls, though we haven't got to reviewing 
it yet.
http://patchwork.ozlabs.org/patch/478072/

It looks like systemd is coping with 370 not being implemented, so that
might be enough to get it running.

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https://bugs.launchpad.net/bugs/1470170

Title:
  Unsupported syscalls 370 and 355

Status in QEMU:
  New

Bug description:
  Qemu seems to be missing syscalls 370 and 355 when running qemu
  usermode arm. These are used by systemd or some similar new package.
  This can be detected by creating an debian sid armhf with qemu
  debootstrap. When the system is launched with "systemd-nspawn -bD sid-
  arm" this happens (newest git as of today):

  pawning container sid-arm on /home/jpakkane/qemutest/sid-arm. 
  Press ^] three times within 1s to kill container. 
  Failed to create directory /home/jpakkane/qemutest/sid-arm//sys/fs/selinux: 
Read-only file system 
  Failed to create directory /home/jpakkane/qemutest/sid-arm//sys/fs/selinux: 
Read-only file system 
  /etc/localtime is not a symlink, not updating container timezone. 
  qemu: Unsupported syscall: 370 
  qemu: Unsupported syscall: 370 
  qemu: Unsupported syscall: 370 
  qemu: Unsupported syscall: 370 
  qemu: Unsupported syscall: 370 
  qemu: Unsupported syscall: 370 
  qemu: Unsupported syscall: 370 
  qemu: Unsupported syscall: 370 
  qemu: Unsupported syscall: 370 
  qemu: Unsupported syscall: 370 
  qemu: Unsupported syscall: 370 
  qemu: Unsupported syscall: 384 
  qemu: Unsupported syscall: 370 
  qemu: Unsupported syscall: 370 
  qemu: Unsupported syscall: 370 
  qemu: Unsupported syscall: 370 
  qemu: Unsupported syscall: 370 
  qemu: Unsupported syscall: 370 
  qemu: Unsupported syscall: 370 
  qemu: Unsupported syscall: 370 
  qemu: Unsupported syscall: 370 
  systemd 221 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR 
+SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT -GNUTLS +ACL +XZ -LZ4 +SECCOMP 
+BLKID -ELFUTILS +KMOD -IDN) 
  Detected virtualization systemd-nspawn. 
  Detected architecture arm. 

  Welcome to Debian GNU/Linux stretch/sid!

  Set hostname to <manos>. 
  qemu: Unsupported syscall: 355 
  Failed to allocate manager object: Function not implemented 
  [!!!!!!] Failed to allocate manager object, freezing.

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