Adding Chuck to cc:, as he's probably done the most mucking with the
mount code in recent years?
--b.
On Fri, Mar 01, 2013 at 12:43:58PM +0100, Jan Engelhardt wrote:
> Hi.
>
>
> I had here a case with a Linux 3.7.9 system, a virtual machine in a
> RFC1918 range, that did not want to mount NFS.
>
> linux-3lzm:~ # strace -fe mount mount -t nfs 134.76.12.5:/X /mnt
> Process 1477 attached
> [pid 1515] mount("134.76.12.5:/X", "/mnt", "nfs", 0, "vers=4,addr=134.76.12.5,clientaddr=0.0.0.0") = -1 EIO (Input/output error)
> mount.nfs: mount system call failed
> [pid 1477] +++ exited with 32 +++
> --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1477, si_status=32, si_utime=0, si_stime=0} ---
> +++ exited with 32 +++
>
> Nothing in dmesg...
>
> [ 84.202243] RPC: Registered named UNIX socket transport module.
> [ 84.202246] RPC: Registered udp transport module.
> [ 84.202248] RPC: Registered tcp transport module.
> [ 84.202249] RPC: Registered tcp NFSv4.1 backchannel transport module.
> [ 84.205909] FS-Cache: Loaded
> [ 84.208782] FS-Cache: Netfs 'nfs' registered for caching
> [ 84.215733] NFS: Registering the id_resolver key type
> [ 84.215762] Key type id_resolver registered
> [ 84.215763] Key type id_legacy registered
>
> When mounting with NFSv3, the error became clear:
>
> # strace -fe mount -s 65536 mount -t nfs 134.76.12.5:/X /mnt -o nfsvers=3,nolock
> Process 1550 attached
> mount.nfs: Network is unreachable
> [pid 1550] +++ exited with 32 +++
> --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1550, si_status=32, si_utime=0, si_stime=0} ---
> +++ exited with 32 +++
>
> Can NFSv4 be made to return -ENETUNREACH as well?
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