Roland> - Allows userspace to set node_desc by writing into sysfs file, eg.
Roland> echo -n `hostname` >> /sys/class/infiniband/mthca0/node_desc
Hal> Shouldn't there be a non volatile way to do this ?
I'm not sure what "non volatile" means in this context. For Mellanox
HCAs, one can already set a permanent NodeDescription in the flash
when burning firmware. Also, the echo command above was just an
example; a hotplug script could also do
cat /my/permanent/node_desc > /sys/class/infiniband/mthca0/node_desc
or anything more elaborate it wants.
Hal> Are there issues with userspace being able to do this or is
Hal> the access rights on /sys/class/infiniband/mthca0/node_desc
Hal> sufficient ?
No, there are no issues. The node_desc file is owned by root and has
perms 0644, and root can already change the node_desc by more
nefarious means anyway.
- R.
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