src/sys/xfsattrs.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 AFS_XFSATTRS_H
  11 #define AFS_XFSATTRS_H
  12 #ifdef AFS_SGI_XFS_IOPS_ENV
  13
  14 /* This header file contains the definitions of the XFS attributes used to
  15  * implement vice inodes for the XFS fileserver.
  16  */
  17
  18 #include <sys/attributes.h>
  19
  20 /* Parameters in at_param are:
  21  * volume special file:
  22  * 0 volume
  23  * 1 INODESPECIAL
  24  * 2 special file type
  25  * 3 parent volume
  26  *
  27  * regular AFS file:
  28  * 0 RW volume
  29  * 1 vnode
  30  * 2 uniquifier
  31  * 3 data version
  32  */
  33 typedef int afs_inode_params_t[4];      /* Use to pass param[4] to kernel. */
  34
  35 /* XFS attribute must be at most 36 bytes to fit in inode. This includes
  36  * the null terminated name of the attribute.
  37  */
  38
  39 #define AFS_XFS_ATTR "AFS"
  40 /* The version number covers all of the attribute of the vice inode including
  41  * mode, uid and gid.
  42  */
  43 #define AFS_XFS_ATTR_VERS ((char)1)
  44
  45 /* The name version is the version of the scheme used to name vice inodes.
  46  * version 1 is /vicepX/.<volume-id>/.<uniquifier>.<tag> All numbers are
  47  * in base 64. Use the utilities in util/base64.c for conversion.
  48  * Version 2 is /vicepX/.afsinodes.<volume-id>/.<uniquifier>.<tag>
  49  */
  50 #define AFS_XFS_NAME_VERS1 ((char)1)
  51 #define AFS_XFS_NAME_VERS2 ((char)2)
  52 #define AFS_XFS_NAME_VERS  AFS_XFS_NAME_VERS2
  53 #define AFS_INODE_DIR_NAME ".afsinodes."
  54
  55 /* Unfortunately, to get all this in 39 bytes requires proper packing.
  56  * So, the version number is at an offset instead of first.
  57  */
  58 typedef struct {
  59 #ifdef KERNEL
  60     ino_t at_pino;              /* inode# of parent directory. */
  61 #else
  62     uint64_t at_pino;           /* inode# of parent directory. */
  63 #endif
  64     u_char at_attr_version;     /* version number of struct, currently 0. */
  65     u_char at_name_version;     /* version number of file names. */
  66     u_short at_tag;             /* guarantees unique file names. */
  67     afs_inode_params_t at_param;        /* vice parameters. */
  68 } afs_xfs_attr_t;
  69
  70 /* Use this for getting and setting attr. sizeof struct is too large. */
  71 #define SIZEOF_XFS_ATTR_T (7*sizeof(int))
  72
  73 /* Additional info is stored in inode standard attributes:
  74  * mode - low 7 bits are link count.
  75  * uid - clipped volume id (inode_p1)
  76  * gid - XFS_VICEMAGIC
  77  * Only set low 31 bits of uid and gid so chown can fix in xfs_ListViceInodes.
  78  */
  79 #define AFS_XFS_MODE_LINK_MASK 0x7
  80 #define AFS_XFS_VNO_CLIP(V) (V & 0x7fffffff)
  81
  82 /* AFS_XFS_DATTR is used by ListViceInodes to restrict it's search to
  83  * AFS directories. Using an attribute, since it can't inadvertantly be
  84  * changed by Unix syscalls.
  85  */
  86 #define AFS_XFS_DATTR "AFSDIR"
  87 typedef struct {
  88 #define AFS_XFS_ATD_VERS 1
  89     char atd_version;
  90     char atd_spare[3];
  91     int atd_volume;             /* RW volume id */
  92 } afs_xfs_dattr_t;
  93 #define SIZEOF_XFS_DATTR_T sizeof(afs_xfs_dattr_t)
  94
  95 /* vice_inode_info_t must match ViceInodeInfo for the salvager.
  96  * vice_inode_info_t and i_list_inode_t are used to get the inode
  97  * information from XFS partitions. The ili_name_version is
  98  * used to ensure we're using the correct naming algorithm
  99  * to fix file names in ListViceInodes.
 100  */
 101 typedef struct {
 102     uint64_t inodeNumber;
 103     int byteCount;
 104     int linkCount;
 105     int param[4];
 106 } vice_inode_info_t;
 107
 108 typedef struct {
 109 #define AFS_XFS_ILI_VERSION 1
 110     u_int ili_version;          /* input is requested struct version. */
 111     u_char ili_attr_version;    /* attr's version */
 112     u_char ili_name_version;    /* attr's name version */
 113     u_short ili_tag;            /* at_tag number. */
 114     uint64_t ili_pino;          /* parent inode number. */
 115     vice_inode_info_t ili_info; /* Must be at a 64 bit offset. */
 116     u_int ili_vno, ili_magic;
 117 } i_list_inode_t;
 118
 119
 120 #endif /* AFS_SGI_XFS_IOPS_ENV */
 121 #endif /* AFS_XFSATTRS_H */