I started uml_daemon as root by mistake, so /tmp/uml.ctl even if /dev/net/tun was world-readable. Ok, I did it. This is the result (after trying many times to do 'ifconfig eth0 up' inside UML):
[42949710.290000] Choosing a random ethernet address for device eth0 [42949710.290000] Netdevice 0 (3a:9d:6f:12:83:b2) : daemon backend (uml_switch version 3) - unix:/tmp/uml.ctl [42949710.290000] daemon_open : control connect failed, errno = 13 (13 = EPERM) [42949720.360000] Registering fd 0 twice [42949720.360000] Irqs : 2, 5 [42949720.360000] Ids : 0x0000000061a795f8, 0x0000000061d181c0 [42949720.360000] uml_net_open: failed to get irq(-12) (-12 is -ENOMEM, not -13 + 1, but is caused by 'registering XXX twice'). [42949720.360000] Registering fd 0 twice [42949720.360000] Irqs : 2, 5 [42949720.360000] Ids : 0x0000000061a795f8, 0x0000000061d181c0 [42949720.360000] uml_net_open: failed to get irq(-12) Looking into the code, I saw that: 1) daemon_user_init is confusing because it saved any error into pri->fd, instead of returning it to the caller. Also, it would make sense to move this into daemon_open. 2) connect_to_switch uses the same errno twice - it shouldn't, and we're hitting this. um_interrupt is called with fd => 0 because errno is cleared after printk (verified under debugging, I did not trace it fully to where it's changing but it's sufficient for a patch anyway). -- Inform me of my mistakes, so I can add them to my list! Paolo Giarrusso, aka Blaisorblade http://www.user-mode-linux.org/~blaisorblade Chiacchiera con i tuoi amici in tempo reale! http://it.yahoo.com/mail_it/foot/*http://it.messenger.yahoo.com ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
