Diff related to vmctl reload below...

Eric Augé <[email protected]> writes:

> Hello,
>
> small questions regarding 2 things I noticed today:
>
> II == vmd guest: linux x86 host: openbsd/amd64 ==
>
> I had a running/installed x86 alpine linux virt VM running on vmm(4).
> I "sysupgrade -s" 'd 2 days ago from my previous -current and the x86
> guest just does not run anymore, I've tried reinstalling an
> alpine-virt 3.22 x86, vmd goes to 100% CPU after a  minute or 2 when
> booting the virt install ISO.
>
> https://dl-cdn.alpinelinux.org/alpine/v3.22/releases/x86/alpine-virt-3.22.1-x86.iso
>
> I had not run it for a while, so I am not sure when the behavior changed.
> I am not sure if it's a me problem, or if anybody else experiences
> similar symptoms on linux x86 guests on an amd64 OpenBSD host HV.
>
> I tried with OpenBSD i386 and it seems to run fine
>
> II == vmctl reload ==
>
> I noticed another thing, "vmctl reload" just stalls... and never ends
> it seems to stall on recvmsg() from /var/run/vmd.sock
> ---
>   6808 vmctl    RET   kbind 0
>   6808 vmctl    CALL  kbind(0x734d85a9f0e0,24,0xd4092a5288fecfd1)
>   6808 vmctl    RET   kbind 0
>   6808 vmctl    CALL  recvmsg(3,0x734d85a9f1d0,0)
> ...
> ---
> Anyone experienced something similar ?
> Any idea what I have missed?

Try the below diff. You will need to rebuild both vmd and vmctl (as
vmctl relies on shared header files from vmd).


diff refs/heads/master refs/heads/vmd-vmctl-reload
commit - adfd21e9d9de44ec58cb6572dda9c677e59b7964
commit + 3d1793eea15f1aaedbdd89f0b64fc72af7e576a4
blob - 581739abf59d3d1bf0d9e026817c955fc17e6fe8
blob + 45d39356bb9d0bc9ce2a6f026f7b1fcbdb712711
--- usr.sbin/vmd/proc.h
+++ usr.sbin/vmd/proc.h
@@ -26,6 +26,7 @@
 #define _PROC_H

 enum {
+       IMSG_NONE = 0,
        IMSG_CTL_OK,
        IMSG_CTL_FAIL,
        IMSG_CTL_VERBOSE,
blob - f10b945b37f20e59ad961268a2d57a40c85fbe37
blob + 8bc41dd280fadccc19d19297508672aa86057d50
--- usr.sbin/vmd/virtio.c
+++ usr.sbin/vmd/virtio.c
@@ -807,7 +807,7 @@ vmmci_ack(struct virtio_dev *dev, unsigned int cmd)
                 * timeout to give the VM a chance to reboot before the
                 * timer is expired.
                 */
-               if (v->cmd == 0) {
+               if (v->cmd == IMSG_NONE) {
                        log_debug("%s: vm %u requested shutdown", __func__,
                            dev->vm_id);
                        vm_pipe_send(&v->dev_pipe, VMMCI_SET_TIMEOUT_SHORT);
blob - 6132f15735b54204e3743df3bd16827a62bc74b6
blob + 627d0f3f3adbfda62025c08aa6b4ddd580dfcae0
--- usr.sbin/vmd/vmd.c
+++ usr.sbin/vmd/vmd.c
@@ -91,7 +91,7 @@ int
 vmd_dispatch_control(int fd, struct privsep_proc *p, struct imsg *imsg)
 {
        struct privsep                  *ps = p->p_ps;
-       int                              res = 0, cmd = 0, verbose;
+       int                              res = 0, cmd = IMSG_NONE, verbose;
        unsigned int                     v = 0, flags;
        struct vmop_create_params        vmc;
        struct vmop_id                   vid;
@@ -251,14 +251,13 @@ vmd_dispatch_control(int fd, struct privsep_proc *p, s
                control_reset(&ps->ps_csock);
                TAILQ_FOREACH(rcs, &ps->ps_rcsocks, cs_entry)
                        control_reset(rcs);
-               cmd = 0;
                break;
        default:
                return (-1);
        }

        switch (cmd) {
-       case 0:
+       case IMSG_NONE:
                break;
        case IMSG_VMDOP_START_VM_RESPONSE:
        case IMSG_VMDOP_TERMINATE_VM_RESPONSE:
blob - 8a33e351745a63401ebff65e6d301766d1f883da
blob + 08b51df37960de8964cfb2903af8a835da0b39cc
--- usr.sbin/vmd/vmm.c
+++ usr.sbin/vmd/vmm.c
@@ -95,7 +95,7 @@ int
 vmm_dispatch_parent(int fd, struct privsep_proc *p, struct imsg *imsg)
 {
        struct privsep          *ps = p->p_ps;
-       int                      res = 0, cmd = 0, verbose;
+       int                      res = 0, cmd = IMSG_NONE, verbose;
        struct vmd_vm           *vm = NULL;
        struct vm_terminate_params vtp;
        struct vmop_id           vid;

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