| #if !defined(_RDMA_IB_H) |
| #define _RDMA_IB_H |
| |
| #include <linux/sched.h> |
| |
| /* |
| * The IB interfaces that use write() as bi-directional ioctl() are |
| * fundamentally unsafe, since there are lots of ways to trigger "write()" |
| * calls from various contexts with elevated privileges. That includes the |
| * traditional suid executable error message writes, but also various kernel |
| * interfaces that can write to file descriptors. |
| * |
| * This function provides protection for the legacy API by restricting the |
| * calling context. |
| */ |
| static inline bool ib_safe_file_access(struct file *filp) |
| { |
| return filp->f_cred == current_cred() && segment_eq(get_fs(), USER_DS); |
| } |
| |
| #endif /* _RDMA_IB_H */ |
