[question] ibv_reg_mr() returning EACCESS

[Vinit Agnihotri <vinita@ryussi.com>]

Hi,

I am trying to use setfsgid()/setfssid() calls to ensure proper access 
check for linux users.

However if user is non-root then ibv_reg_mr() returns EACCESS. While I 
am sure I am calling ibv_reg_mr()

as root user, not sure why it still returns EACCESS.

While going through libibverbs sources I realize EACCESS might be 
returned by this call:

if (write(pd->context->cmd_fd, cmd, cmd_size) != cmd_size)
         return errno;

Can anyone provide any insight into this behavior? Does calling these 
systems calls in threads can affect

entire process? I checked /dev/infiniband/* has appropriate privileges.


Thanks & Regards,

Vinit.