Issue with samba and xen.

[Mark Davies <mark%ecs.vuw.ac.nz@localhost>]

On a 10.0_BETA/amd64 system running GENERIC kernel, I can set up a samba 
share and successfully connect to it from windows and other machines.

If I reboot the system with xenkernel415 and XEN3_DOM0 kernel, and try 
to do the equivalent connection smbd dies with:

  1261   1261 smbd     CALL  writev(0xf,0x7f7fff9d6550,2)
  1261   1261 smbd     GIO   fd 15 wrote 162 bytes
       "[2023/02/06 12:29:26.389460, 10, pid=1261, effective(0, 0), 
real(0, 0)] ../../lib/dbwrap/d\
        bwrap_tdb.c:60(db_tdb_log_key)\n  db_tdb_log_key: Unlocking key 
77D95B94\n"
  1261   1261 smbd     RET   writev 162/0xa2
  1261   1261 smbd     CALL  fcntl(0x12,F_SETLKW,0x7f7fff9d6700)
  1261   1261 smbd     RET   fcntl 0
  1261   1261 smbd     PSIG  SIGILL SIG_DFL: code=ILL_PRVOPC, 
addr=0x700283b39e00, trap=0)
   742    742 smbd     RET   poll -1 errno 4 Interrupted system call
   742    742 smbd     PSIG  SIGCHLD caught handler=0x70028ce0a59e 
mask=(8,13,31): code=CLD_KILLED c
hild pid=1261, uid=0,  status=4, utime=0, stime=0)



Same thing happens with a XEN3_DOMU system with equivalent userland setup:

   242    242 smbd     CALL  writev(3,0x7f7fff2b7f50,2)
   242    242 smbd     GIO   fd 3 wrote 494 bytes
       "  {\"timestamp\": \"2023-02-06T12:39:23.478907+1300\", 
\"type\": \"Authorization\", \"Auth\
        orization\": {\"version\": {\"major\": 1, \"minor\": 1}, 
\"localAddress\": \"ipv4:130.195.\
        5.11:445\", \"remoteAddress\": \"ipv4:130.195.6.74:50458\", 
\"serviceDescription\": \"SMB2\
        \", \"authType\": \"NTLMSSP\", \"domain\": \"SMB\", 
\"account\": \"mark\", \"sid\": \"S-1-\
        5-21-661017460-65209947-574721591-3004\", \"sessionId\": 
\"972c3964-a8e1-42f8-bf81-e25f4f1\
        d87e3\", \"logonServer\": \"SMB\", \"transportProtection\": 
\"SMB\", \"accountFlags\": \"0\
        x00000010\"}}\n"
   242    242 smbd     RET   writev 494/0x1ee
   242    242 smbd     PSIG  SIGILL SIG_DFL: code=ILL_PRVOPC, 
addr=0x78d46b139e00, trap=0)
   339    339 smbd     RET   poll -1 errno 4 Interrupted system call
   339    339 smbd     PSIG  SIGCHLD caught handler=0x78d47440a59e 
mask=(8,13,31): code=CLD_KILLED c
hild pid=242, uid=0,  status=4, utime=0, stime=0)



Any ideas what's going on?

cheers
mark