I have to support pushd and popd from userspace in a filesystem that I have designed.

In my filesystem driver, to implement it I have done the following

for popd - the driver implementation is

#define pop_root() \

current->fsuid = context->uid; \

current->fsgid = context->gid; \

recursive_mutex_unlock(&context->id_lock)

for pushd - the driver implementation is

#define push_root() \

recursive_mutex_lock(&context->id_lock); \

context->uid = current->fsuid; \

context->gid = current->fsgid; \

current->fsuid = 0; \

current->fsgid = 0

But this implementation is failing at run time.

This is the script with which I am testing this driver. All pushd and propd are not working in this script.

After trying many other alternatives, I think overriding commits would be a better choice. So then I would try overriding commits as the below link

Regards,

Saket Sinha

Can somebody help