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Re: [BProc] Re: Reading libs fails through NFS
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From: J.A. M. <jam...@ab...> - 2003-11-23 00:57:26
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On 11.17, Trond Myklebust wrote:
> >>>>> " " == J A Magallon <J.A.> writes:
>
> > Hi all... Anybody has any idea about why this fails:
>
> > fd = open("/lib/libnss_files.so.2", O_RDONLY); res =
> > read(fd,buf,512);
>
> No. Nobody else will be able to tell you either until you tell us what
> setup you are using.
>
I run a small bproc cluster. Nodes are diskless, boot with a custom initrd,
and execute a simple linuxrc (comments and echo's stripped):
PATH=/bin:/sbin:/usr/bin:/usr/sbin
mount -n -o remount,rw /
mount -t proc none /proc
mount -t devpts -omode=0620 none /dev/pts
mount -t tmpfs none /dev/shm
mount -t tmpfs none /tmp
ifconfig lo up 127.0.0.1
modprobe eth0
ifconfig eth0 up
dhcpcd -H -D -R -N eth0
portmap
mount /lib
mount /bin
mount /sbin
mount /usr
mount /opt
mount /home
mount /work/shared
modprobe eth1
ifconfig eth1 up
dhcpcd -R -N eth1
ntpdate -v 192.168.0.1
modprobe bproc
bpslave -v -d -r 192.168.1.1
fstab for nodes (in /etc in initrd) is:
rootfs / rootfs defaults 0 0
none /proc proc defaults 0 0
none /dev/pts devpts mode=0620 0 0
none /dev/shm tmpfs defaults 0 0
none /tmp tmpfs defaults 0 0
192.168.0.1:/lib /lib nfs nfsvers=3,ro,noac,suid
192.168.0.1:/bin /bin nfs nfsvers=3,ro,noac,suid
192.168.0.1:/sbin /sbin nfs nfsvers=3,ro,noac,suid
192.168.0.1:/usr /usr nfs nfsvers=3,ro,noac,suid
192.168.0.1:/opt /opt nfs nfsvers=3,ro,noac,suid
192.168.0.1:/home /home nfs nfsvers=3,rw
192.168.0.1:/work /work/shared nfs nfsvers=3,rw
For example, /opt is just the mount point in initrd, so it is empty. It is
ro, just soft to use:
annwn:/opt> pwd
/opt
annwn:/opt> ls
aleph/ coin/ intel/ mpich/
annwn:/opt> bpsh 0 pwd
/opt
annwn:/opt> bpsh 0 ls
ls: reading directory .: Invalid argument
annwn:~> bpsh 0 ls /opt/*
ls: reading directory /opt/aleph: Invalid argument
/opt/aleph:
ls: reading directory /opt/coin: Invalid argument
/opt/coin:
ls: reading directory /opt/intel: Invalid argument
/opt/intel:
ls:
/opt/mpich:
reading directory /opt/mpich: Invalid argument
annwn:~> bpsh 0 strace ls /opt
...
stat64("/opt", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
open("/opt", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = 3
fstat64(3, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
fcntl64(3, F_SETFD, FD_CLOEXEC) = 0
getdents64(3, 0x8060360, 8192) = -1 EINVAL (Invalid argument)
close(3) = 0
...
annwn:/opt> bpsh 0 strace ls
...
open(".", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = 3
fstat64(3, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
fcntl64(3, F_SETFD, FD_CLOEXEC) = 0
getdents64(3, 0x8060350, 8192) = -1 EINVAL (Invalid argument)
close(3) = 0
...
It looks like readdir fails (getdents).
Uh ?
I use a custom kernel, still have to try with plain -rc3 + bproc. But
do you have any ideas about what is going/what am I doing wrong ? This
all worked some time ago with my hacked -jam kernels.
TIA for you attention.
--
J.A. Magallon <jamagallon()able!es> \ Software is like sex:
werewolf!able!es \ It's better when it's free
Mandrake Linux release 10.0 (Cooker) for i586
Linux 2.4.23-rc3-jam1 (gcc 3.3.1 (Mandrake Linux 9.2 3.3.1-4mdk))
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