include/linux/nfs_idmap.h

   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
  37 #ifndef NFS_IDMAP_H
  38 #define NFS_IDMAP_H
  39
  40 #include <linux/types.h>
  41
  42 /* XXX from bits/utmp.h  */
  43 #define IDMAP_NAMESZ  128
  44
  45 #define IDMAP_TYPE_USER  0
  46 #define IDMAP_TYPE_GROUP 1
  47
  48 #define IDMAP_CONV_IDTONAME 0
  49 #define IDMAP_CONV_NAMETOID 1
  50
  51 #define IDMAP_STATUS_INVALIDMSG 0x01
  52 #define IDMAP_STATUS_AGAIN      0x02
  53 #define IDMAP_STATUS_LOOKUPFAIL 0x04
  54 #define IDMAP_STATUS_SUCCESS    0x08
  55
  56 struct idmap_msg {
  57         __u8  im_type;
  58         __u8  im_conv;
  59         char  im_name[IDMAP_NAMESZ];
  60         __u32 im_id;
  61         __u8  im_status;
  62 };
  63
  64 #ifdef __KERNEL__
  65
  66 /* Forward declaration to make this header independent of others */
  67 struct nfs_client;
  68 struct nfs_server;
  69 struct nfs_fattr;
  70 struct nfs4_string;
  71
  72 #ifdef CONFIG_NFS_USE_NEW_IDMAPPER
  73
  74 int nfs_idmap_init(void);
  75 void nfs_idmap_quit(void);
  76
  77 static inline int nfs_idmap_new(struct nfs_client *clp)
  78 {
  79         return 0;
  80 }
  81
  82 static inline void nfs_idmap_delete(struct nfs_client *clp)
  83 {
  84 }
  85
  86 #else /* CONFIG_NFS_USE_NEW_IDMAPPER not set */
  87
  88 static inline int nfs_idmap_init(void)
  89 {
  90         return 0;
  91 }
  92
  93 static inline void nfs_idmap_quit(void)
  94 {
  95 }
  96
  97 int nfs_idmap_new(struct nfs_client *);
  98 void nfs_idmap_delete(struct nfs_client *);
  99
 100 #endif /* CONFIG_NFS_USE_NEW_IDMAPPER */
 101
 102 void nfs_fattr_init_names(struct nfs_fattr *fattr,
 103                 struct nfs4_string *owner_name,
 104                 struct nfs4_string *group_name);
 105 void nfs_fattr_free_names(struct nfs_fattr *);
 106 void nfs_fattr_map_and_free_names(struct nfs_server *, struct nfs_fattr *);
 107
 108 int nfs_map_name_to_uid(const struct nfs_server *, const char *, size_t, __u32 *);
 109 int nfs_map_group_to_gid(const struct nfs_server *, const char *, size_t, __u32 *);
 110 int nfs_map_uid_to_name(const struct nfs_server *, __u32, char *, size_t);
 111 int nfs_map_gid_to_group(const struct nfs_server *, __u32, char *, size_t);
 112
 113 extern unsigned int nfs_idmap_cache_timeout;
 114 #endif /* __KERNEL__ */
 115
 116 #endif /* NFS_IDMAP_H */