On 2011-09-22, at 6:23 PM, Nikitas Angelinas wrote:
> sysname holds "Linux" by default, i.e. what appears when doing a "uname
> -s"; nodename should be used to print the machine's hostname, i.e. what
> is returned when doing a "uname -n" or "hostname", and what
> gethostname(2)/sethostname(2) manipulate, in order to notify the
> administrator of the node which is contending to mount the filesystem.
>
> Signed-off-by: Nikitas Angelinas <nikitas_angelinas@xxxxxxxxxxx>
> Signed-off-by: Andrew Perepechko <andrew_perepechko@xxxxxxxxxxx>
This looks to have crept in with the port of the patch to RHEL6, which
required the code to stop accessing system_utsname directly and instead
using the init_utsname() helper to access the structure. That version
of the patch was contributed by an external developer, so I can't really
say why it was done, probably just an oversight. In our RHEL5 patch it
used to be:
memcpy(mmp->mmp_nodename, system_utsname.nodename,
sizeof(mmp->mmp_nodename));
You can add Acked-by: Andreas Dilger <adilger@xxxxxxxxx>.
Thanks for the fix.
> ---
> fs/ext4/mmp.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/fs/ext4/mmp.c b/fs/ext4/mmp.c
> index 9bdef3f..2fca64e 100644
> --- a/fs/ext4/mmp.c
> +++ b/fs/ext4/mmp.c
> @@ -109,7 +109,7 @@ static int kmmpd(void *data)
> mmp->mmp_check_interval = cpu_to_le16(mmp_check_interval);
> bdevname(bh->b_bdev, mmp->mmp_bdevname);
>
> - memcpy(mmp->mmp_nodename, init_utsname()->sysname,
> + memcpy(mmp->mmp_nodename, init_utsname()->nodename,
> sizeof(mmp->mmp_nodename));
>
> while (!kthread_should_stop()) {
> --
> 1.7.4.4
>
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Cheers, Andreas
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