fs/afs/afs.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /* AFS common types
   3  *
   4  * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
   5  * Written by David Howells (dhowells@redhat.com)
   6  */
   7
   8 #ifndef AFS_H
   9 #define AFS_H
  10
  11 #include <linux/in.h>
  12
  13 #define AFS_MAXCELLNAME         64      /* Maximum length of a cell name */
  14 #define AFS_MAXVOLNAME          64      /* Maximum length of a volume name */
  15 #define AFS_MAXNSERVERS         8       /* Maximum servers in a basic volume record */
  16 #define AFS_NMAXNSERVERS        13      /* Maximum servers in a N/U-class volume record */
  17 #define AFS_MAXTYPES            3       /* Maximum number of volume types */
  18 #define AFSNAMEMAX              256     /* Maximum length of a filename plus NUL */
  19 #define AFSPATHMAX              1024    /* Maximum length of a pathname plus NUL */
  20 #define AFSOPAQUEMAX            1024    /* Maximum length of an opaque field */
  21
  22 #define AFS_VL_MAX_LIFESPAN     (120 * HZ)
  23 #define AFS_PROBE_MAX_LIFESPAN  (30 * HZ)
  24
  25 typedef u64                     afs_volid_t;
  26 typedef u64                     afs_vnodeid_t;
  27 typedef u64                     afs_dataversion_t;
  28
  29 typedef enum {
  30         AFSVL_RWVOL,                    /* read/write volume */
  31         AFSVL_ROVOL,                    /* read-only volume */
  32         AFSVL_BACKVOL,                  /* backup volume */
  33 } __attribute__((packed)) afs_voltype_t;
  34
  35 typedef enum {
  36         AFS_FTYPE_INVALID       = 0,
  37         AFS_FTYPE_FILE          = 1,
  38         AFS_FTYPE_DIR           = 2,
  39         AFS_FTYPE_SYMLINK       = 3,
  40 } afs_file_type_t;
  41
  42 typedef enum {
  43         AFS_LOCK_READ           = 0,    /* read lock request */
  44         AFS_LOCK_WRITE          = 1,    /* write lock request */
  45 } afs_lock_type_t;
  46
  47 #define AFS_LOCKWAIT            (5 * 60) /* time until a lock times out (seconds) */
  48
  49 /*
  50  * AFS file identifier
  51  */
  52 struct afs_fid {
  53         afs_volid_t     vid;            /* volume ID */
  54         afs_vnodeid_t   vnode;          /* Lower 64-bits of file index within volume */
  55         u32             vnode_hi;       /* Upper 32-bits of file index */
  56         u32             unique;         /* unique ID number (file index version) */
  57 };
  58
  59 /*
  60  * AFS callback notification
  61  */
  62 typedef enum {
  63         AFSCM_CB_UNTYPED        = 0,    /* no type set on CB break */
  64         AFSCM_CB_EXCLUSIVE      = 1,    /* CB exclusive to CM [not implemented] */
  65         AFSCM_CB_SHARED         = 2,    /* CB shared by other CM's */
  66         AFSCM_CB_DROPPED        = 3,    /* CB promise cancelled by file server */
  67 } afs_callback_type_t;
  68
  69 struct afs_callback {
  70         time64_t                expires_at;     /* Time at which expires */
  71         //unsigned              version;        /* Callback version */
  72         //afs_callback_type_t   type;           /* Type of callback */
  73 };
  74
  75 struct afs_callback_break {
  76         struct afs_fid          fid;            /* File identifier */
  77         //struct afs_callback   cb;             /* Callback details */
  78 };
  79
  80 #define AFSCBMAX 50     /* maximum callbacks transferred per bulk op */
  81
  82 struct afs_uuid {
  83         __be32          time_low;                       /* low part of timestamp */
  84         __be16          time_mid;                       /* mid part of timestamp */
  85         __be16          time_hi_and_version;            /* high part of timestamp and version  */
  86         __s8            clock_seq_hi_and_reserved;      /* clock seq hi and variant */
  87         __s8            clock_seq_low;                  /* clock seq low */
  88         __s8            node[6];                        /* spatially unique node ID (MAC addr) */
  89 };
  90
  91 /*
  92  * AFS volume information
  93  */
  94 struct afs_volume_info {
  95         afs_volid_t             vid;            /* volume ID */
  96         afs_voltype_t           type;           /* type of this volume */
  97         afs_volid_t             type_vids[5];   /* volume ID's for possible types for this vol */
  98
  99         /* list of fileservers serving this volume */
 100         size_t                  nservers;       /* number of entries used in servers[] */
 101         struct {
 102                 struct in_addr  addr;           /* fileserver address */
 103         } servers[8];
 104 };
 105
 106 /*
 107  * AFS security ACE access mask
 108  */
 109 typedef u32 afs_access_t;
 110 #define AFS_ACE_READ            0x00000001U     /* - permission to read a file/dir */
 111 #define AFS_ACE_WRITE           0x00000002U     /* - permission to write/chmod a file */
 112 #define AFS_ACE_INSERT          0x00000004U     /* - permission to create dirent in a dir */
 113 #define AFS_ACE_LOOKUP          0x00000008U     /* - permission to lookup a file/dir in a dir */
 114 #define AFS_ACE_DELETE          0x00000010U     /* - permission to delete a dirent from a dir */
 115 #define AFS_ACE_LOCK            0x00000020U     /* - permission to lock a file */
 116 #define AFS_ACE_ADMINISTER      0x00000040U     /* - permission to change ACL */
 117 #define AFS_ACE_USER_A          0x01000000U     /* - 'A' user-defined permission */
 118 #define AFS_ACE_USER_B          0x02000000U     /* - 'B' user-defined permission */
 119 #define AFS_ACE_USER_C          0x04000000U     /* - 'C' user-defined permission */
 120 #define AFS_ACE_USER_D          0x08000000U     /* - 'D' user-defined permission */
 121 #define AFS_ACE_USER_E          0x10000000U     /* - 'E' user-defined permission */
 122 #define AFS_ACE_USER_F          0x20000000U     /* - 'F' user-defined permission */
 123 #define AFS_ACE_USER_G          0x40000000U     /* - 'G' user-defined permission */
 124 #define AFS_ACE_USER_H          0x80000000U     /* - 'H' user-defined permission */
 125
 126 /*
 127  * AFS file status information
 128  */
 129 struct afs_file_status {
 130         u64                     size;           /* file size */
 131         afs_dataversion_t       data_version;   /* current data version */
 132         struct timespec64       mtime_client;   /* Last time client changed data */
 133         struct timespec64       mtime_server;   /* Last time server changed data */
 134         s64                     author;         /* author ID */
 135         s64                     owner;          /* owner ID */
 136         s64                     group;          /* group ID */
 137         afs_access_t            caller_access;  /* access rights for authenticated caller */
 138         afs_access_t            anon_access;    /* access rights for unauthenticated caller */
 139         umode_t                 mode;           /* UNIX mode */
 140         afs_file_type_t         type;           /* file type */
 141         u32                     nlink;          /* link count */
 142         s32                     lock_count;     /* file lock count (0=UNLK -1=WRLCK +ve=#RDLCK */
 143         u32                     abort_code;     /* Abort if bulk-fetching this failed */
 144 };
 145
 146 struct afs_status_cb {
 147         struct afs_file_status  status;
 148         struct afs_callback     callback;
 149         unsigned int            cb_break;       /* Pre-op callback break counter */
 150         bool                    have_status;    /* True if status record was retrieved */
 151         bool                    have_cb;        /* True if cb record was retrieved */
 152         bool                    have_error;     /* True if status.abort_code indicates an error */
 153 };
 154
 155 /*
 156  * AFS file status change request
 157  */
 158
 159 #define AFS_SET_MTIME           0x01            /* set the mtime */
 160 #define AFS_SET_OWNER           0x02            /* set the owner ID */
 161 #define AFS_SET_GROUP           0x04            /* set the group ID (unsupported?) */
 162 #define AFS_SET_MODE            0x08            /* set the UNIX mode */
 163 #define AFS_SET_SEG_SIZE        0x10            /* set the segment size (unsupported) */
 164
 165 /*
 166  * AFS volume synchronisation information
 167  */
 168 struct afs_volsync {
 169         time64_t                creation;       /* volume creation time */
 170 };
 171
 172 /*
 173  * AFS volume status record
 174  */
 175 struct afs_volume_status {
 176         afs_volid_t             vid;            /* volume ID */
 177         afs_volid_t             parent_id;      /* parent volume ID */
 178         u8                      online;         /* true if volume currently online and available */
 179         u8                      in_service;     /* true if volume currently in service */
 180         u8                      blessed;        /* same as in_service */
 181         u8                      needs_salvage;  /* true if consistency checking required */
 182         u32                     type;           /* volume type (afs_voltype_t) */
 183         u64                     min_quota;      /* minimum space set aside (blocks) */
 184         u64                     max_quota;      /* maximum space this volume may occupy (blocks) */
 185         u64                     blocks_in_use;  /* space this volume currently occupies (blocks) */
 186         u64                     part_blocks_avail; /* space available in volume's partition */
 187         u64                     part_max_blocks; /* size of volume's partition */
 188         s64                     vol_copy_date;
 189         s64                     vol_backup_date;
 190 };
 191
 192 #define AFS_BLOCK_SIZE  1024
 193
 194 /*
 195  * XDR encoding of UUID in AFS.
 196  */
 197 struct afs_uuid__xdr {
 198         __be32          time_low;
 199         __be32          time_mid;
 200         __be32          time_hi_and_version;
 201         __be32          clock_seq_hi_and_reserved;
 202         __be32          clock_seq_low;
 203         __be32          node[6];
 204 };
 205
 206 #endif /* AFS_H */