LXR linux/net/rds/info.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _RDS_INFO_H
   3#define _RDS_INFO_H
   4
   5struct rds_info_lengths {
   6        unsigned int    nr;
   7        unsigned int    each;
   8};
   9
  10struct rds_info_iterator;
  11
  12/*
  13 * These functions must fill in the fields of @lens to reflect the size
  14 * of the available info source.  If the snapshot fits in @len then it
  15 * should be copied using @iter.  The caller will deduce if it was copied
  16 * or not by comparing the lengths.
  17 */
  18typedef void (*rds_info_func)(struct socket *sock, unsigned int len,
  19                              struct rds_info_iterator *iter,
  20                              struct rds_info_lengths *lens);
  21
  22void rds_info_register_func(int optname, rds_info_func func);
  23void rds_info_deregister_func(int optname, rds_info_func func);
  24int rds_info_getsockopt(struct socket *sock, int optname, char __user *optval,
  25                        int __user *optlen);
  26void rds_info_copy(struct rds_info_iterator *iter, void *data,
  27                   unsigned long bytes);
  28void rds_info_iter_unmap(struct rds_info_iterator *iter);
  29
  30
  31#endif
  32