Ceph » CephFS

We use `shallow_copy`(24279ef8) for `MetaRequest::set_caller_perms ` in `Client::make_request` but indeed the lifetime of `MetaRequest` is possible to longer than a `syscall`, because the request will return when they received `unsafe_reply` with release the `UserPerms`, but the `MetaRequest` will not unregister immediately, we have to rebuild the `MClientRequest` when mds reboot, in `send_reconnect`, and that's will access `MetaRequest::perms::gids` again.

int Client::make_request(MetaRequest* request, const UserPerm& perms,
                         InodeRef* ptarget, bool* pcreated, mds_rank_t use_mds,
                         bufferlist* pdirbl)
{
    ...
    request->set_caller_perms(perms);

struct MetaRequest
{
    ...
    void set_caller_perms(const UserPerm& _perms) {
        perms.shallow_copy(_perms);