linux/include/linux/nfs_idmap.h
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   1/*
   2 * include/linux/nfs_idmap.h
   3 *
   4 *  UID and GID to name mapping for clients.
   5 *
   6 *  Copyright (c) 2002 The Regents of the University of Michigan.
   7 *  All rights reserved.
   8 *
   9 *  Marius Aamodt Eriksen <marius@umich.edu>
  10 *
  11 *  Redistribution and use in source and binary forms, with or without
  12 *  modification, are permitted provided that the following conditions
  13 *  are met:
  14 *
  15 *  1. Redistributions of source code must retain the above copyright
  16 *     notice, this list of conditions and the following disclaimer.
  17 *  2. Redistributions in binary form must reproduce the above copyright
  18 *     notice, this list of conditions and the following disclaimer in the
  19 *     documentation and/or other materials provided with the distribution.
  20 *  3. Neither the name of the University nor the names of its
  21 *     contributors may be used to endorse or promote products derived
  22 *     from this software without specific prior written permission.
  23 *
  24 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  25 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  26 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  27 *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  29 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  30 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  31 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  32 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  33 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  34 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35 */
  36#ifndef NFS_IDMAP_H
  37#define NFS_IDMAP_H
  38
  39#include <linux/uidgid.h>
  40#include <uapi/linux/nfs_idmap.h>
  41
  42
  43/* Forward declaration to make this header independent of others */
  44struct nfs_client;
  45struct nfs_server;
  46struct nfs_fattr;
  47struct nfs4_string;
  48
  49#if IS_ENABLED(CONFIG_NFS_V4)
  50int nfs_idmap_init(void);
  51void nfs_idmap_quit(void);
  52#else
  53static inline int nfs_idmap_init(void)
  54{
  55        return 0;
  56}
  57
  58static inline void nfs_idmap_quit(void)
  59{}
  60#endif
  61
  62int nfs_idmap_new(struct nfs_client *);
  63void nfs_idmap_delete(struct nfs_client *);
  64
  65void nfs_fattr_init_names(struct nfs_fattr *fattr,
  66                struct nfs4_string *owner_name,
  67                struct nfs4_string *group_name);
  68void nfs_fattr_free_names(struct nfs_fattr *);
  69void nfs_fattr_map_and_free_names(struct nfs_server *, struct nfs_fattr *);
  70
  71int nfs_map_name_to_uid(const struct nfs_server *, const char *, size_t, kuid_t *);
  72int nfs_map_group_to_gid(const struct nfs_server *, const char *, size_t, kgid_t *);
  73int nfs_map_uid_to_name(const struct nfs_server *, kuid_t, char *, size_t);
  74int nfs_map_gid_to_group(const struct nfs_server *, kgid_t, char *, size_t);
  75
  76extern unsigned int nfs_idmap_cache_timeout;
  77#endif /* NFS_IDMAP_H */
  78
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