fsmount: > Unlike open_tree(2) with OPEN_TREE_CLONE, fsmount() can only be called once in the lifetime of a filesystem instance to produce a mount object. I don't understand what you meant here. This phrase in its current form is wrong. Consider this scenario: we did this: fsopen(...) fsconfig(..., FSCONFIG_SET_STRING, "source", ...) fsconfig(..., FSCONFIG_CMD_CREATE, ...) fsmount(...) fsopen(...) fsconfig(..., FSCONFIG_SET_STRING, "source", ...) fsconfig(..., FSCONFIG_CMD_CREATE, ...) fsmount(...) We used FSCONFIG_CMD_CREATE here as opposed to FSCONFIG_CMD_CREATE_EXCL, thus it is possible that second fsmount will return mount for the same superblock. Thus that statement "fsmount() can only be called once in the lifetime of a filesystem instance to produce a mount object" is not true. -- Askar Safin https://types.pl/@safinaskar
