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TOMOYO Linux Cross Reference
Linux/fs/afs/afs.h

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

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