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Description of problem: When installing s390x guest using kickstart I use a little script to write to the current console: function ECHO { for TTY in `cat /proc/consoles | cut -f1 -d' '`; do echo "$*" > /dev/$TTY; done } This works fine for x86_64, ppc64 and aarch64, each using different console, but it does not work on s390, because the /proc/consoles does not list the console specified on kernel cmdline. Version-Release number of selected component (if applicable): Fedora-Server-DVD-s390x-23.iso How reproducible: Always Steps to Reproduce: 1. Run installation, I'm using `avocaod-vt`, the qemu command is: MALLOC_PERTURB_=1 /usr/local/bin/qemu-system-s390x \ -S \ -name 'avocado-vt-vm1' \ -machine s390-ccw-virtio \ -nodefaults \ -vga none \ -chardev socket,id=hmp_id_hmp1,path=/var/tmp/avocado_P5KN9W/monitor-hmp1-20160701-052711-ZWrvMKs7,server,nowait \ -mon chardev=hmp_id_hmp1,mode=readline \ -chardev socket,id=hmp_id_catch_monitor,path=/var/tmp/avocado_P5KN9W/monitor-catch_monitor-20160701-052711-ZWrvMKs7,server,nowait \ -mon chardev=hmp_id_catch_monitor,mode=readline \ -chardev socket,id=serial_id_serial0,path=/var/tmp/avocado_P5KN9W/serial-serial0-20160701-052711-ZWrvMKs7,server,nowait \ -device sclpconsole,chardev=serial_id_serial0 \ -drive id=drive_image1,if=none,aio=threads,format=qcow2,file=/usr/share/avocado/data/avocado-vt/images/f23-s390x.qcow2 \ -device virtio-blk-ccw,id=image1,drive=drive_image1,bootindex=1 \ -device virtio-net-ccw,mac=9a:6f:70:71:72:73,id=iditdkcd,netdev=idDxpjtr \ -netdev user,id=idDxpjtr,hostfwd=tcp::5000-:22,hostfwd=tcp::5001-:12323 \ -m 1024 \ -smp 2,maxcpus=2,cores=1,threads=1,sockets=2 \ -cpu 'host' \ -device virtio-scsi-ccw,id=virtio_scsi_ccw0 \ -drive id=drive_cd1,if=none,aio=threads,media=cdrom,file=/usr/share/avocado/data/avocado-vt/isos/linux/Fedora-Server-DVD-s390x-23.iso \ -device scsi-cd,id=cd1,drive=drive_cd1,bootindex=2 \ -drive id=drive_unattended,if=none,aio=threads,media=cdrom,file=/usr/share/avocado/data/avocado-vt/images/f23-ppc64le/ks.iso \ -device scsi-cd,id=unattended,drive=drive_unattended,bootindex=3 \ -kernel '/usr/share/avocado/data/avocado-vt/images/f23-s390x/kernel.img' \ -append 'ks=cdrom nicdelay=60 console=ttysclp0' \ -initrd '/usr/share/avocado/data/avocado-vt/images/f23-s390x/initrd.img' \ -vnc :0 \ -rtc base=utc,clock=host \ -boot strict=on \ -enable-kvm 2. Switch to console using alt+tab 3. cat /proc/consoles Actual results: ttyS1 -W- (E p ) 4:65 Expected results: ttysclp0 ... Additional info: [anaconda root@localhost ~]# cat /proc/consoles ttyS1 -W- (E p ) 4:65 [anaconda root@localhost ~]# cat /proc/cmdline ks=cdrom nicdelay=60 console=ttysclp0 [anaconda root@localhost ~]# echo "foo" > /dev/ttyS1 [anaconda root@localhost ~]# echo "bar" > /dev/ttysclp0 bar echo "bar" > /dev/ttysclp0 [anaconda root@localhost ~]# ls /dev/tty* /dev/tty /dev/tty4 /dev/ttyS1 /dev/ttysclp0
*********** MASS BUG UPDATE ************** We apologize for the inconvenience. There is a large number of bugs to go through and several of them have gone stale. Due to this, we are doing a mass bug update across all of the Fedora 23 kernel bugs. Fedora 23 has now been rebased to 4.7.4-100.fc23. Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel. If you have moved on to Fedora 24 or 25, and are still experiencing this issue, please change the version to Fedora 24 or 25. If you experience different issues, please open a new bug report for those.
I don't have the time and system to retest this, but I believe it's still valid.
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This is still wrong in Rawhide: $ virt-rescue --scratch The virt-rescue escape key is ‘^]’. Type ‘^] h’ for help. ------------------------------------------------------------ Welcome to virt-rescue, the libguestfs rescue shell. Note: The contents of / (root) are the rescue appliance. You have to mount the guest’s partitions under /sysroot before you can examine them. ><rescue> cat /proc/consoles ttyS1 -W- (E p ) 4:65 I am using kernel-4.10.0-1.fc26.s390x.
As well as the latest RHEL.7.
It is not a bug as far as I can tell. The _tty_ is named ttysclp0, but the console driver is named ttyS1 (for historical reasons) so on the command line doing "console=ttysclp0" should not change anything because this is not a valid console name. "console=ttyS1" (ascii console) or "console=ttyS0" (line mode console) should work. This would then also match /proc/consoles
See drivers/s390/char/sclp_vt220.c #define SCLP_VT220_DEVICE_NAME "ttysclp" #define SCLP_VT220_CONSOLE_NAME "ttyS" #define SCLP_VT220_CONSOLE_INDEX 1 /* console=ttyS1 */ [...] static struct console sclp_vt220_console = { .name = SCLP_VT220_CONSOLE_NAME, [...] .index = SCLP_VT220_CONSOLE_INDEX }; static int __init sclp_vt220_con_init(void) { [...] register_console(&sclp_vt220_console); return 0; }
I think using the major:minor number from /proc/consoles should do the job here. 4:65 is the major:minor of /dev/ttysclp0 as far as I can see.
Is the major:minor number working well enough so that we could close this bug nowadays?
Major:minor works well, it is safe to close this bug, but it is a bit confusing.
The same bug breaks debian-installer as well [1,2] and also previously affected sparc64 where my patch to fix the naming inconsistency was accepted [3]. Not sure why this shouldn't be fixed for s390x as well. The worst regression that happens that admins will have to update their scripts to use the proper serial console, i.e. stop using work-arounds and rely on /proc/consoles as it should be. Adrian > [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=926539 > [2] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=961056 > [3] https://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc.git/commit/?id=07a6d63eb1b54b5fb38092780fe618dfe1d96e23