info.h 973 B

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. #ifndef _RDS_INFO_H
  3. #define _RDS_INFO_H
  4. struct rds_info_lengths {
  5. unsigned int nr;
  6. unsigned int each;
  7. };
  8. struct rds_info_iterator;
  9. /*
  10. * These functions must fill in the fields of @lens to reflect the size
  11. * of the available info source. If the snapshot fits in @len then it
  12. * should be copied using @iter. The caller will deduce if it was copied
  13. * or not by comparing the lengths.
  14. */
  15. typedef void (*rds_info_func)(struct socket *sock, unsigned int len,
  16. struct rds_info_iterator *iter,
  17. struct rds_info_lengths *lens);
  18. void rds_info_register_func(int optname, rds_info_func func);
  19. void rds_info_deregister_func(int optname, rds_info_func func);
  20. int rds_info_getsockopt(struct socket *sock, int optname, char __user *optval,
  21. int __user *optlen);
  22. void rds_info_copy(struct rds_info_iterator *iter, void *data,
  23. unsigned long bytes);
  24. void rds_info_iter_unmap(struct rds_info_iterator *iter);
  25. #endif