Thank you Jason.
I did went through archives for the same.
Can you please provide pointer towards documentation or
sample userspace usage for the same? Or which kernel version to be
looked into?
Thanks & Regards,
Vinit.
On 15/11/19 7:42 PM, Jason Gunthorpe wrote:
On Fri, Nov 15, 2019 at 09:27:40AM +0530, Vinit Agnihotri wrote:
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.
This is a security limitation, if you want do this flow you need a new
enough kernel and rdma-core to support the ioctl() scheme for calling
verbs
Jason
