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 */ 207