src/afs/exporter.h

   1 /*
   2  * Copyright 2000, International Business Machines Corporation and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  */
   9
  10 #ifndef __EXPORTER__
  11 #define __EXPORTER__
  12
  13 #ifdef UID_NOBODY
  14 #define NFS_NOBODY      UID_NOBODY
  15 #endif
  16 #ifndef NFS_NOBODY
  17 #define NFS_NOBODY      -2      /* maps Nfs's "nobody" but since not declared by some systems (i.e. Ultrix) we use a constant  */
  18 #endif
  19 #define RMTUSER_REQ             0xabc
  20 #define RMTUSER_REQ_PRIV        0xabe
  21
  22 /**
  23   * There is a limitation on the number of bytes that can be passed into
  24   * the file handle that nfs passes into AFS.  The limit is 10 bytes.
  25   * We pass in an array of long of size 2. On a 32 bit system this would be
  26   * 8 bytes. But on a 64 bit system this would be 16 bytes. The first
  27   * element of this array is a pointer so we cannot truncate that. But the
  28   * second element is the AFS_XLATOR_MAGIC, which we can truncate.
  29   * So on a 64 bit system the 10 bytes are used as below
  30   * Bytes 1-8                   pointer to vnode
  31   * Bytes 9 and 10              AFS_XLATOR_MAGIC
  32   *
  33   * And hence for 64 bit environments AFS_XLATOR_MAGIC is 8765 which takes
  34   * up 2 bytes
  35   */
  36
  37 #if defined(AFS_SUN5_64BIT_ENV) || (defined(AFS_SGI61_ENV) && (_MIPS_SZPTR==64)) || defined(AFS_LINUX_64BIT_KERNEL)
  38 #define AFS_XLATOR_MAGIC        0x8765  /* XXX */
  39 #else
  40 #define AFS_XLATOR_MAGIC        0x87654321
  41 #endif
  42
  43 #if defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
  44 #define AFS_NFSXLATORREQ(cred) 0
  45 #else
  46 #define AFS_NFSXLATORREQ(cred)    (afs_cr_rgid(cred) == NFSXLATOR_CRED)
  47 #endif
  48
  49 struct afs_exporter;
  50
  51 struct exporterops {
  52     int (*export_reqhandler) (struct afs_exporter *exp,
  53                               afs_ucred_t **cred,
  54                               afs_uint32 host,
  55                               afs_int32 *pag,
  56                               struct afs_exporter **expp);
  57     void (*export_hold) (struct afs_exporter *exp);
  58     void (*export_rele) (struct afs_exporter *exp);
  59     int (*export_sysname) (struct afs_exporter *exp,
  60                            char *inname,
  61                            char ***outname,
  62                            int *num,
  63                            int allpags);
  64     void (*export_garbagecollect) (struct afs_exporter *exp,
  65                                    afs_int32 param);
  66     int (*export_statistics) (struct afs_exporter *exp);
  67     int (*export_checkhost) (struct afs_exporter *exp, afs_uint32 host);
  68     afs_uint32 (*export_gethost) (struct afs_exporter *exp);
  69 };
  70
  71 struct exporterstats {
  72     afs_int32 calls;            /* # of calls to the exporter */
  73     afs_int32 rejectedcalls;    /* # of afs rejected  calls */
  74     afs_int32 nopag;            /* # of unpagged remote calls */
  75     afs_int32 invalidpag;       /* # of invalid pag calls */
  76 };
  77
  78 struct afs_exporter {
  79     struct afs_exporter *exp_next;
  80     struct exporterops *exp_op;
  81     afs_int32 exp_states;
  82     afs_int32 exp_type;
  83     struct exporterstats exp_stats;
  84     char *exp_data;
  85 };
  86
  87 /* exp_type values */
  88 #define EXP_NULL    0           /* Undefined */
  89 #define EXP_NFS     1           /* Nfs/Afs translator */
  90
  91 /* exp_states values */
  92 #define EXP_EXPORTED    1
  93 #define EXP_UNIXMODE    2
  94 #define EXP_PWSYNC      4
  95 #define EXP_SUBMOUNTS   8
  96 #define EXP_CLIPAGS    16
  97 #define EXP_CALLBACK   32
  98
  99
 100 #define AFS_NFSFULLFID  1
 101
 102 #define EXP_REQHANDLER(EXP, CRED, HOST, PAG, EXPP) \
 103         (*(EXP)->exp_op->export_reqhandler)(EXP, CRED, HOST, PAG, EXPP)
 104 #define EXP_HOLD(EXP)   \
 105         (*(EXP)->exp_op->export_hold)(EXP)
 106 #define EXP_RELE(EXP)   \
 107         (*(EXP)->exp_op->export_rele)(EXP)
 108 #define EXP_SYSNAME(EXP, INNAME, OUTNAME, NUM, ALLPAGS)   \
 109         (*(EXP)->exp_op->export_sysname)(EXP, INNAME, OUTNAME, NUM, ALLPAGS)
 110 #define EXP_GC(EXP, param)      \
 111         (*(EXP)->exp_op->export_garbagecollect)(EXP, param)
 112 #define EXP_STATISTICS(EXP)     \
 113         (*(EXP)->exp_op->export_statistics)(EXP)
 114 #define EXP_CHECKHOST(EXP, HOST)        \
 115         (*(EXP)->exp_op->export_checkhost)(EXP, HOST)
 116 #define EXP_GETHOST(EXP)        \
 117         (*(EXP)->exp_op->export_gethost)(EXP)
 118
 119 struct afs3_fid {
 120     u_short len;
 121     u_short padding;
 122     afs_uint32 Cell;
 123     afs_uint32 Volume;
 124     afs_uint32 Vnode;
 125     afs_uint32 Unique;
 126 };
 127
 128 struct Sfid {
 129     afs_uint32 padding;
 130     afs_uint32 Cell;
 131     afs_uint32 Volume;
 132     afs_uint32 Vnode;
 133     afs_uint32 Unique;
 134 #ifdef  AFS_SUN5_ENV
 135     struct cred *credp;
 136 #endif
 137 };
 138
 139
 140 #endif /* __EXPORTER__ */