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Linux/fs/afs/afs.h

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  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         256     /* 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         bool                    have_status;    /* True if status record was retrieved */
150         bool                    have_cb;        /* True if cb record was retrieved */
151         bool                    have_error;     /* True if status.abort_code indicates an error */
152 };
153 
154 /*
155  * AFS file status change request
156  */
157 
158 #define AFS_SET_MTIME           0x01            /* set the mtime */
159 #define AFS_SET_OWNER           0x02            /* set the owner ID */
160 #define AFS_SET_GROUP           0x04            /* set the group ID (unsupported?) */
161 #define AFS_SET_MODE            0x08            /* set the UNIX mode */
162 #define AFS_SET_SEG_SIZE        0x10            /* set the segment size (unsupported) */
163 
164 /*
165  * AFS volume synchronisation information
166  */
167 struct afs_volsync {
168         time64_t                creation;       /* volume creation time */
169 };
170 
171 /*
172  * AFS volume status record
173  */
174 struct afs_volume_status {
175         afs_volid_t             vid;            /* volume ID */
176         afs_volid_t             parent_id;      /* parent volume ID */
177         u8                      online;         /* true if volume currently online and available */
178         u8                      in_service;     /* true if volume currently in service */
179         u8                      blessed;        /* same as in_service */
180         u8                      needs_salvage;  /* true if consistency checking required */
181         u32                     type;           /* volume type (afs_voltype_t) */
182         u64                     min_quota;      /* minimum space set aside (blocks) */
183         u64                     max_quota;      /* maximum space this volume may occupy (blocks) */
184         u64                     blocks_in_use;  /* space this volume currently occupies (blocks) */
185         u64                     part_blocks_avail; /* space available in volume's partition */
186         u64                     part_max_blocks; /* size of volume's partition */
187         s64                     vol_copy_date;
188         s64                     vol_backup_date;
189 };
190 
191 #define AFS_BLOCK_SIZE  1024
192 
193 /*
194  * XDR encoding of UUID in AFS.
195  */
196 struct afs_uuid__xdr {
197         __be32          time_low;
198         __be32          time_mid;
199         __be32          time_hi_and_version;
200         __be32          clock_seq_hi_and_reserved;
201         __be32          clock_seq_low;
202         __be32          node[6];
203 };
204 
205 #endif /* AFS_H */
206 

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