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#uml IRC Logs for 2007-05-25

---Logopened Fri May 25 00:00:37 2007
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08:27<jdike>Hi guys
08:31<kokoko1>Hiya jdike
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09:58<linux__alien>hello
10:00<linux__alien>i am using FC6 with kernel 2.6.20-1.2948 Kernel and downloaded UML version linux-2.6.22-rc2 and i want to try virtual networking but i am not able to configure eth0 . i read through the HowTo but not able to follow it completely. Could someone help me please?
10:01<linux__alien>while booting i get this error
10:01<linux__alien>Bringing up interface eth0: Device eth0 does not seem to be present, delaying initialization.
10:02<jdike>what's the command line?
10:02<linux__alien>should the UML version be equal to my kernel version?
10:02<linux__alien>hey jdike
10:02<jdike>no, it shouldn't
10:02<jdike>should the bash version be the same as your kernel version?
10:02<linux__alien>./linux-2.6.22-rc2 ubda=FedoraCore5-x86-root_fs mem=128M
10:03<linux__alien>i got this doubt because of this message
10:03<linux__alien>modprobe: FATAL: Could not load /lib/modules/2.6.22-rc2/modules.dep: No such file or directory
10:03<jdike>well
10:03<jdike>you didn't put an ethernet device on the command line
10:03<jdike>why are you surprised that there isn't one?
10:04<linux__alien>jdike, i followed the Virtual Networking How to and i gave this command
10:04<linux__alien>eth0=ethertap,tap0,fe:fd:0:0:0:1,192.168.0.254
10:05<linux__alien>and then tried configuring eth0 using ifconfig but didnt work
10:05<jdike>on the UML command line?
10:05<linux__alien>no
10:05<linux__alien>after it booted
10:05<jdike>what do you think bash will do with something like "eth0=ethertap,tap0,fe:fd:0:0:0:1,192.168.0.254"
10:05<jdike>is that a bash command?
10:06<linux__alien>infact it didnt give me any error :-)
10:06<jdike>of course not
10:06<jdike>a=3 won't give you an error either
10:06<jdike>and that's pretty much what you did
10:07<linux__alien>Oh Ok
10:08<linux__alien>so is there any tutorial that shows me how to setup a virtual network coz the HowTo thats there in the website is not very clear or rather i understand it properly
10:08<jdike>http://user-mode-linux.sourceforge.net/new/network.html
10:10<linux__alien>so if i need eth0 i will have to give them while executing this itself? something like this ?
10:10<linux__alien>./linux-2.6.22-rc2 ubda=FedoraCore5-x86-root_fs mem=128M eth0=tuntap,,,192.168.0.254
10:10<linux__alien>i mean not those 3 commas with proper values?
10:10<jdike>there's nothing wrong with the 3 commas
10:11<jdike>assuming you have the uml utilities installed
10:11<linux__alien>jdike, its hung right now
10:11<linux__alien>jdike, not booting
10:11<linux__alien>Warning: cannot open /proc/net/dev (No such file or directory). Limited output.
10:11<linux__alien>Warning: cannot open /proc/net/dev (No such file or directory). Limited output.
10:11<linux__alien>[ OK ]
10:11<linux__alien>Bringing up interface eth0: line_ioctl: tty0: ioctl TIOCLINUX called
10:12<linux__alien>line_ioctl: tty0: ioctl TIOCLINUX called
10:12<linux__alien>Device eth0 does not seem to be present, delaying initialization.
10:12<linux__alien>[FAILED]
10:12<linux__alien>touch: cannot touch `/var/lock/subsys/network': Read-only file system
10:12<linux__alien>line_ioctl: tty0: ioctl TIOCLINUX called
10:12<linux__alien>Starting system logger:
10:12<linux__alien>thats it
10:12<linux__alien>it does not proceed after that
10:12<jdike>what happened before that?
10:12<linux__alien>jdike, some of these messages
10:12<linux__alien>Could not load /lib/modules/2.6.22-rc2/modules.dep: No such file or directory
10:13<jdike>what else?
10:13<linux__alien>Initializing software serial port version 1
10:13<linux__alien> ubda: unknown partition table
10:13<linux__alien>kjournald starting. Commit interval 5 seconds
10:13<linux__alien>EXT3-fs: mounted filesystem with ordered data mode.
10:13<linux__alien>VFS: Mounted root (ext3 filesystem) readonly.
10:13<linux__alien>modprobe: FATAL: Could not load /lib/modules/2.6.22-rc2/modules.dep: No such file or directory
10:13<linux__alien>line_ioctl: tty0: ioctl KDSIGACCEPT called
10:13<linux__alien>INIT: version 2.86 booting
10:13<linux__alien>INIT: Entering runlevel: 3
10:13<linux__alien>line_ioctl: tty0: ioctl TIOCLINUX called
10:13<linux__alien>^[[Aline_ioctl: tty0: ioctl TIOCLINUX called
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10:14<linux__alien>and when i do a ps -ef | grep linux
10:14<linux__alien>i see many processes
10:14<linux__alien>balaji 4967 2710 0 20:42 pts/4 00:00:01 ./linux-2.6.22-rc2 ubda=FedoraCore5-x86-root_fs mem=128M
10:14<linux__alien>balaji 4972 4967 0 20:42 pts/4 00:00:00 ./linux-2.6.22-rc2 ubda=FedoraCore5-x86-root_fs mem=128M
10:14<linux__alien>balaji 4973 4967 0 20:42 pts/4 00:00:00 ./linux-2.6.22-rc2 ubda=FedoraCore5-x86-root_fs mem=128M
10:14<linux__alien>balaji 4974 4967 0 20:42 pts/4 00:00:00 ./linux-2.6.22-rc2 ubda=FedoraCore5-x86-root_fs mem=128M
10:14<linux__alien>balaji 4975 4967 0 20:42 pts/4 00:00:00 [linux-2.6.22-rc]
10:14<linux__alien>balaji 4982 4967 0 20:42 pts/4 00:00:00 [linux-2.6.22-rc]
10:14<linux__alien>balaji 5233 4967 0 20:42 pts/4 00:00:00 [linux-2.6.22-rc]
10:14<linux__alien>balaji 5238 4967 0 20:42 pts/4 00:00:00 [linux-2.6.22-rc]
10:14<linux__alien>balaji 5240 4967 0 20:42 pts/4 00:00:00 [linux-2.6.22-rc]
10:14<linux__alien>root 5271 5251 0 20:45 pts/5 00:00:00 grep linux
10:14<linux__alien>lot of instances . Is that expected ?
10:15<jdike>yup
10:15<linux__alien>Oh Ok
10:18<linux__alien>its now got hung in a different place
10:18<linux__alien>This is what i ve given in the command line to boot UML
10:18<linux__alien>./linux-2.6.22-rc2 ubda=FedoraCore5-x86-root_fs mem=128M eth0=tuntap,,,192.168.0.254
10:18<linux__alien>is that ok?
10:19<linux__alien>if my input is ok, then this is what happens
10:19<linux__alien>Bringing up loopback interface: [ OK ]
10:19<linux__alien>Bringing up interface eth0: SIOCSIFFLAGS: Operation not permitted
10:19<linux__alien>Failed to bring up eth0.
10:19<linux__alien>[FAILED]
10:19<linux__alien>Bringing up interface eth0.old:
10:19<linux__alien>Determining IP information for eth0...SIOCSIFFLAGS: Operation not permitted
10:19<linux__alien>SIOCSIFFLAGS: Operation not permitted
10:19<linux__alien> failed.
10:19<linux__alien>[FAILED]
10:19<linux__alien>here it just waits for a long time is it because its trying to access some DHCP ?
10:20<linux__alien>and then it slowly boots up
10:20<jdike>maybe
10:20<jdike>can you log in?
10:20<linux__alien>yes i am able to log in
10:20<linux__alien>but i stll dont get eth0 :-)
10:20<linux__alien>i dont know why
10:23<jdike>what does dmesg say?
10:24<linux__alien>i am booting it again
10:24<linux__alien>one sec
10:24<linux__alien>Bringing up interface eth0: Device eth0 does not seem to be present, delaying initialization.
10:24<linux__alien>[FAILED]
10:26<linux__alien>i ve a doubt the web site says that in FC5 you have posted the ifcfg-eth0 file where in if you have configured an IP address there it should take it. I ve done the same thing i ve a file in /etc/sysconfig/network-scripts/ifcfg-eth0 but it does not seem to take that
10:26<linux__alien>and i get the same error
10:26<linux__alien>am i missing something here?
10:28<jdike>what does dmesg say?
10:29<linux__alien>dmesg does not say anything about eth0
10:29<linux__alien>Using 2.6 host AIO
10:29<linux__alien>NET: Registered protocol family 16
10:29<linux__alien>NET: Registered protocol family 2
10:29<linux__alien>IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
10:29<linux__alien>TCP established hash table entries: 8192 (order: 4, 65536 bytes)
10:29<linux__alien>TCP bind hash table entries: 8192 (order: 3, 32768 bytes)
10:29<linux__alien>TCP: Hash tables configured (established 8192 bind 8192)
10:29<linux__alien>TCP reno registered
10:29<linux__alien>line_ioctl: tty0: ioctl KDSIGACCEPT called
10:29<linux__alien>line_ioctl: tty0: ioctl TIOCLINUX called
10:29<linux__alien>line_ioctl: tty0: ioctl TIOCLINUX called
10:29<linux__alien>the above 3 lines repeat for few more times
10:30<jdike>what was the command line?
10:30<linux__alien>./linux-2.6.22-rc2 ubda=FedoraCore5-x86-root_fs mem=128M
10:30<linux__alien>thats it
10:31<linux__alien>have i dont a mistake?
10:31<jdike>where's the eth0=...
10:31<linux__alien>i mean have i done a mistake?
10:31<linux__alien>but i already have the config for eth0 in the ifcfg-eth0 file
10:32<jdike>where's the eth0=...?
10:32<linux__alien>ok one sec ve given that also and its booting
10:33<linux__alien>still does not work let me post what dmesg says
10:33<linux__alien>TCP cubic registered
10:33<linux__alien>NET: Registered protocol family 1
10:33<linux__alien>NET: Registered protocol family 17
10:33<linux__alien>Initialized stdio console driver
10:33<linux__alien>Console initialized on /dev/tty0
10:33<linux__alien>Initializing software serial port version 1
10:33<linux__alien> ubda: unknown partition table
10:33<linux__alien>Choosing a random ethernet address for device eth0
10:33<linux__alien>Netdevice 0 (ce:45:c5:71:25:f4) : TUN/TAP backend - IP = 192.168.0.254
10:33<linux__alien>kjournald starting. Commit interval 5 seconds
10:33<linux__alien>EXT3-fs: mounted filesystem with ordered data mode.
10:33<linux__alien>VFS: Mounted root (ext3 filesystem) readonly.
10:33<linux__alien>helper_child - execvp of 'uml_net' failed - errno = 2
10:33<linux__alien>hurray now it works !!!
10:34<linux__alien>Great i finally got eth0
10:34<jdike>no
10:34<jdike>you still need uml_net
10:34<linux__alien>where do i get that from and how do i install it?
10:35<linux__alien>jdike, please dont mistake me i feel that the documentation could be more elaborate with some screenshots and stuff like that so for newbies it would be really useful
10:35<jdike>http://user-mode-linux.sourceforge.net/new/minis.html#utils
10:35<linux__alien>probably i could write the documentation also
10:37<linux__alien>here comes the problem which i am not able to understand. Now i ve downloaded that tar file and placed it in the Desktop but i cannot my Desktop folder from inside UML . Now how do i install it
10:37<linux__alien>should i go to my host Linux kernel and install it
10:37<linux__alien>i think thats how it should be done right?
10:37<jdike>yes
10:37<jdike>that's installed on the host, not UML
10:38<linux__alien>uml_mount.c:1:32: error: fuse/fuse_lowlevel.h: No such file or directory
10:38<linux__alien>an error while i compile it
10:38<linux__alien>should i install FUSE ?
10:38<linux__alien>and fuse-devel?
10:39<linux__alien>i am using FC6 so can i install it using yum?
10:39<jdike>comment uml_mount out of the Makefile
10:39<jdike>or install fuse-devel
10:40<linux__alien>i ll install fuse-devel . Installing it
10:41<linux__alien>yes installed uml tools
10:41<linux__alien>is that all?
10:42<linux__alien>i mean now when i do ifconfig eth0 i get to see eth0 so can i assign an ip address to the interface?
10:42<jdike>boot it and see
10:42<linux__alien>i assigned an IP address and tried pinging and it works :-)
10:43<linux__alien>now it reads the ifcfg-eth0 file
10:43<linux__alien>great
10:43<linux__alien>now ve got ifconfig
10:44<linux__alien>so if i run an other instance of UML in an other Konsole and boot it can i test a BGP session over it?
10:44<linux__alien>i mean assuming i follow the steps that i did for this
10:45<linux__alien>i want to have a TCP session over which i want to test OSPF,RIP and BGP routing protocols and capture packets using wireshark . Is that possible?
10:48<linux__alien>I guess i should configure an other 2 interfaces inside the same instance of UML right?
10:52<jdike>if you want 3 interfaces, yes
10:53<linux__alien>jdike, i tried copying ifcfg-eth0 and named it as ifcfg-eth1 and gave an other ip address but it does not work
10:53<linux__alien>the same problem that i had with eth0
10:53<linux__alien>it says device not present
10:53<linux__alien>Oh got it
10:53<jdike>well, you remember what you did with eth0?
10:53<linux__alien>I have to give that also as a command line option
10:53<linux__alien>right?
10:53<jdike>do you think maybe it wants eth1 and eth2 there?
10:54<linux__alien>so i ll have to give eth1 and eth2 as command args along with eth0 right
10:54<linux__alien>i think that should solve the problem if i am right?
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10:56<linux__alien>got it :-)
10:56<linux__alien>eth0 and eth1
10:56<linux__alien>ping works
10:59<linux__alien>jdike, where do i get the info of how UML works i mean not just from the end user level but how does it simulate everything
10:59<linux__alien>i want that info where do i get it from
10:59<linux__alien>before i dive into the code
10:59<peterz>linux__alien: teh source code
10:59<jdike>the code
10:59[~]peterz wonders about this obsession with documentation
11:00<peterz>:-)
11:00<linux__alien>jdike, can you tell me the starting point in the code so that i can read through it ?
11:00<peterz>init/main.c
11:02<jdike>that's the start of the Linux kernel
11:02<linux__alien>now i am gonna try my BGP with two interfaces which exist in the same 10.0.0.1 network
11:03<linux__alien>now ve a doubt i installed GNU Zebra and in the following path /usr/local/sbin i have the executables. i get to see those from the host kernel but when i go to the same path in UML i dont get to see them which is normal so how do i install them and how do i access it from UML
11:06<linux__alien>and telnet command does not work in UML
11:06<linux__alien>but i need that how do i telnet to localhost
11:06<linux__alien>i ve my bgp daemon running in the host kernel and now i want to telnet to localhost
11:07<linux__alien>i want to telnet from UML . i guess thats the way right?
11:09<linux__alien>jdike, i dont understand how to test zebra in UML
11:14<jdike>how do you test it on a physical box?
11:15<linux__alien>jdike, after installing it. What i do is that i go to the place where the daemon is placed and i start it like ./zebra -d and then ./bgpd and then i open an other Konsole session and i do a telnet 0 2605 coz 2605 is for BGP and the BGPD would be listening on 2605 port
11:16<linux__alien>this is what i do but in UML i am not able to see those daemons which are installed in /usr/local/sbin and telnet command does not work
11:16<jdike>how does it not work?
11:16<linux__alien>you mean in UML?
11:17<linux__alien>i ve installed the daemons and its in /usr/local/sbin . I get to see those binaries in the Host kernel but inside UML the same path does not contain any files at all
11:18<linux__alien>Thats the first problem and then the second one is that telnet command does not work so i wouldnt get the Command Line Interface
11:18<jdike>well, maybe they're not installed?
11:18<linux__alien>jdike, no let me post the output
11:18<linux__alien>pwd
11:18<linux__alien>/usr/local/sbin
11:18<linux__alien>[root@localhost sbin]# ls -l
11:18<linux__alien>total 6504
11:18<linux__alien>-rwxr-xr-x 1 root root 1891603 May 25 21:31 bgpd
11:18<linux__alien>-rwxr-xr-x 1 root root 1090610 May 25 21:31 ospf6d
11:18<linux__alien>-rwxr-xr-x 1 root root 1398393 May 25 21:31 ospfd
11:18<linux__alien>-rwxr-xr-x 1 root root 824699 May 25 21:31 ripd
11:19<linux__alien>-rwxr-xr-x 1 root root 713615 May 25 21:31 ripngd
11:19<linux__alien>-rwxr-xr-x 1 root root 677020 May 25 21:31 zebra
11:19<linux__alien>this is from Host Kernel
11:19<linux__alien>pwd
11:19<linux__alien>/usr/local/sbin
11:19<linux__alien>[root@localhost sbin]# ls -l
11:19<linux__alien>total 6504
11:19<linux__alien>-rwxr-xr-x 1 root root 1891603 May 25 21:31 bgpd
11:19<linux__alien>-rwxr-xr-x 1 root root 1090610 May 25 21:31 ospf6d
11:19<linux__alien>-rwxr-xr-x 1 root root 1398393 May 25 21:31 ospfd
11:19<linux__alien>-rwxr-xr-x 1 root root 824699 May 25 21:31 ripd
11:19<linux__alien>-rwxr-xr-x 1 root root 713615 May 25 21:31 ripngd
11:19<linux__alien>-rwxr-xr-x 1 root root 677020 May 25 21:31 zebra
11:19<linux__alien>This is from UML
11:19<linux__alien>ooops sorry
11:19<linux__alien>didnt get copied
11:19<linux__alien>[root@localhost sbin]# pwd
11:19<linux__alien>/usr/local/sbin
11:19<linux__alien>[root@localhost sbin]# ls -l
11:19<linux__alien>total 0
11:19<linux__alien>This is from UML
11:20<linux__alien>i halted UML and then again started it also but still i dont get to see the contents of /usr/local/sbin
11:21<jdike>what are you expecting?
11:21<linux__alien>:-) I ve installed zebra in the Host Kernel now i just need to access those binaries and then need to do a telnet to localhost to test it
11:21<linux__alien>thats it
11:22<linux__alien>:-)
11:22<linux__alien>is this a limitation by any chance in UML?
11:22<jdike>did you install zebra inside UML?
11:22<linux__alien>no
11:23<linux__alien>how do i install that
11:23<jdike>well, do you think maybe that would be useful?
11:23<linux__alien>i mean is it possible?
11:23<jdike>why wouldn't it be?
11:24<linux__alien>How do i do that
11:25<jdike>how do you do it on a physical machine?
11:25<linux__alien>./configure make && make install
11:25<jdike>do you think maybe the same thing might work inside UML?
11:26<linux__alien>no
11:26<jdike>why not?
11:26<linux__alien>UML as far as i see needs only the binaries of those daemons
11:26<linux__alien>coz UML does not have gcc and automake installed
11:27<jdike>if you had a physical machine without gcc and automake, what would you do?
11:27<linux__alien>install the binary using yum
11:27<linux__alien>should i do that
11:28<linux__alien>i am kind of confused as to what to do :-( . I am sorry
11:29<jdike>just treat it like a physical box
11:29<jdike>that's all
11:30<linux__alien>still not able to understand :-( .
11:30<linux__alien>if thats the case then my contents in that dir should be visible its not and how do i install Zebra in UML . I dont know seriously
11:30<linux__alien>totally out of ideas :-(
11:31<jdike>if what's the case?
11:31<linux__alien>i ve the tar.gz package of GNU Zebra . Now where do i put it and how do install it in UML
11:31<linux__alien>and how do i telnet to localhost
11:31<linux__alien>these questions
11:31<linux__alien>i dont know
11:31<linux__alien>:-(
11:31<linux__alien>i am sorry
11:36<linux__alien>jdike, i need your help very badly
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11:50<linux__alien>jdike, can you help me please?
11:50<linux__alien>jdike, still not able to get bgp up and running
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11:57<linux__alien>i want to install a software in UML how do i do it ? i am not able to access the tar package kept in the folder /root
11:57<linux__alien>so how do i install it
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16:59<fo0bar>does having skas3 compiled into the kernel affect performance on a non-UML host?
17:01<fo0bar>I saw this as I realize I'm now up to 4 kernels that have to be patched whenever a new debian stable kernel comes out
17:02<fo0bar>-skas, -skas-bigmem, -um, and now (possibly) -3ware
17:02<fo0bar>err say
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17:17<caker>fo0bar: I asked that ages ago, and the answer was No, it doesn't affect performance
17:18<fo0bar>caker: I sense a "... but..." somewhere in here :)
17:19<caker>none that I can recall. AFAIK, /proc/mm just sits there waiting for someone to touch it, and doesn't do anything else otherwise
17:21<fo0bar>caker: that makes sense. I'll try rolling 3ware patches + ARCH=um patches + SKAS3 all into one shared source
17:22<caker>3ware patches?
17:22<caker>running more than what's just in vanilla?
17:23<fo0bar>the 3ware stuff is because the 8006-2lp will be discontinued sometime soon, and the only replacement (9650SE-2lp) is PCI express (which is fine for the hardware I'm buying as long as I get a different riser), but more importantly requires 2.6.19 drivers or later
17:23<fo0bar>and debian etch is 2.6.18. argh
17:23<caker>ah...
17:24<caker>I have had mixed success copying the drivers/3ware* (forget the exact path) from one kernel to another and/or copying from 3ware's driver tarball into the kernel (wanted it built-in rather than having to use modules+initrd). Good luck.
17:25<caker>well, good luck if you don't want modules
17:26<fo0bar>we've got a few choices: buy a few dozen 8006-2LPs ($130 each) and hope they last us until lenny is released, start buying 9550SX-4LP stuff ($300 each), or start buying 9650SE-2LP + PCI Express adapter at $210 each and maintain a separate kernel
17:27<fo0bar>caker: compile or use? because I'm in the middle of a compile now with the new drivers copied into drivers/scsi/
17:27<fo0bar>however, what seems to be new now is they have different tarballs depending on patching 2.6.18, 2.6.17, etc
17:27<fo0bar>I haven't tried downloading multiple ones to see what (if any) has changed between the different versions
17:28<caker>honestly, I forget where I ran into trouble, sorry
17:28<fo0bar>no prob
17:28<fo0bar>I'm going to order a test unit next week and start playing
17:28<fo0bar>15:21 < fo0bar> caker: that makes sense. I'll try rolling 3ware patches + ARCH=um patches + SKAS3 all into one shared source
17:29<fo0bar>^^^ I just realized something: shared source, but of course different configs. I just don't enable CONFIG_PROC_MM in the non-UML kernels :)
17:29<fo0bar>"duh" moment
17:29<caker>I seem to recall taking/needing >= 2.6.18 3ware src but under 2.6.16 because of another, unrelated problem with 2.6.18
17:30<caker>that's if there still a PROC_MM option
17:30<caker>or maybe there is, but they enabled it by default in the patch (which used to not happen)
17:31<fo0bar>yeah, that's it. it's defaulted to Yes since v8 at least
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17:50<fo0bar>well, it compiles...
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---Logclosed Sat May 26 00:00:11 2007