197 lines
6.5 KiB
C
197 lines
6.5 KiB
C
/* AFS common types
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*
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* Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef AFS_H
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#define AFS_H
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#include <linux/in.h>
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#define AFS_MAXCELLNAME 64 /* Maximum length of a cell name */
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#define AFS_MAXVOLNAME 64 /* Maximum length of a volume name */
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#define AFS_MAXNSERVERS 8 /* Maximum servers in a basic volume record */
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#define AFS_NMAXNSERVERS 13 /* Maximum servers in a N/U-class volume record */
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#define AFS_MAXTYPES 3 /* Maximum number of volume types */
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#define AFSNAMEMAX 256 /* Maximum length of a filename plus NUL */
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#define AFSPATHMAX 1024 /* Maximum length of a pathname plus NUL */
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#define AFSOPAQUEMAX 1024 /* Maximum length of an opaque field */
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typedef unsigned afs_volid_t;
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typedef unsigned afs_vnodeid_t;
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typedef unsigned long long afs_dataversion_t;
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typedef enum {
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AFSVL_RWVOL, /* read/write volume */
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AFSVL_ROVOL, /* read-only volume */
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AFSVL_BACKVOL, /* backup volume */
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} __attribute__((packed)) afs_voltype_t;
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typedef enum {
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AFS_FTYPE_INVALID = 0,
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AFS_FTYPE_FILE = 1,
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AFS_FTYPE_DIR = 2,
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AFS_FTYPE_SYMLINK = 3,
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} afs_file_type_t;
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typedef enum {
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AFS_LOCK_READ = 0, /* read lock request */
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AFS_LOCK_WRITE = 1, /* write lock request */
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} afs_lock_type_t;
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#define AFS_LOCKWAIT (5 * 60) /* time until a lock times out (seconds) */
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/*
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* AFS file identifier
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*/
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struct afs_fid {
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afs_volid_t vid; /* volume ID */
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afs_vnodeid_t vnode; /* file index within volume */
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unsigned unique; /* unique ID number (file index version) */
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};
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/*
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* AFS callback notification
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*/
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typedef enum {
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AFSCM_CB_UNTYPED = 0, /* no type set on CB break */
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AFSCM_CB_EXCLUSIVE = 1, /* CB exclusive to CM [not implemented] */
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AFSCM_CB_SHARED = 2, /* CB shared by other CM's */
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AFSCM_CB_DROPPED = 3, /* CB promise cancelled by file server */
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} afs_callback_type_t;
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struct afs_callback {
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unsigned version; /* Callback version */
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unsigned expiry; /* Time at which expires */
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afs_callback_type_t type; /* Type of callback */
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};
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struct afs_callback_break {
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struct afs_fid fid; /* File identifier */
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struct afs_callback cb; /* Callback details */
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};
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#define AFSCBMAX 50 /* maximum callbacks transferred per bulk op */
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struct afs_uuid {
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__be32 time_low; /* low part of timestamp */
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__be16 time_mid; /* mid part of timestamp */
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__be16 time_hi_and_version; /* high part of timestamp and version */
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__s8 clock_seq_hi_and_reserved; /* clock seq hi and variant */
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__s8 clock_seq_low; /* clock seq low */
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__s8 node[6]; /* spatially unique node ID (MAC addr) */
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};
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/*
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* AFS volume information
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*/
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struct afs_volume_info {
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afs_volid_t vid; /* volume ID */
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afs_voltype_t type; /* type of this volume */
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afs_volid_t type_vids[5]; /* volume ID's for possible types for this vol */
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/* list of fileservers serving this volume */
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size_t nservers; /* number of entries used in servers[] */
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struct {
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struct in_addr addr; /* fileserver address */
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} servers[8];
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};
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/*
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* AFS security ACE access mask
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*/
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typedef u32 afs_access_t;
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#define AFS_ACE_READ 0x00000001U /* - permission to read a file/dir */
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#define AFS_ACE_WRITE 0x00000002U /* - permission to write/chmod a file */
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#define AFS_ACE_INSERT 0x00000004U /* - permission to create dirent in a dir */
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#define AFS_ACE_LOOKUP 0x00000008U /* - permission to lookup a file/dir in a dir */
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#define AFS_ACE_DELETE 0x00000010U /* - permission to delete a dirent from a dir */
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#define AFS_ACE_LOCK 0x00000020U /* - permission to lock a file */
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#define AFS_ACE_ADMINISTER 0x00000040U /* - permission to change ACL */
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#define AFS_ACE_USER_A 0x01000000U /* - 'A' user-defined permission */
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#define AFS_ACE_USER_B 0x02000000U /* - 'B' user-defined permission */
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#define AFS_ACE_USER_C 0x04000000U /* - 'C' user-defined permission */
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#define AFS_ACE_USER_D 0x08000000U /* - 'D' user-defined permission */
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#define AFS_ACE_USER_E 0x10000000U /* - 'E' user-defined permission */
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#define AFS_ACE_USER_F 0x20000000U /* - 'F' user-defined permission */
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#define AFS_ACE_USER_G 0x40000000U /* - 'G' user-defined permission */
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#define AFS_ACE_USER_H 0x80000000U /* - 'H' user-defined permission */
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/*
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* AFS file status information
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*/
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struct afs_file_status {
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u64 size; /* file size */
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afs_dataversion_t data_version; /* current data version */
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time_t mtime_client; /* last time client changed data */
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time_t mtime_server; /* last time server changed data */
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unsigned abort_code; /* Abort if bulk-fetching this failed */
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afs_file_type_t type; /* file type */
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unsigned nlink; /* link count */
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u32 author; /* author ID */
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u32 owner; /* owner ID */
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u32 group; /* group ID */
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afs_access_t caller_access; /* access rights for authenticated caller */
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afs_access_t anon_access; /* access rights for unauthenticated caller */
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umode_t mode; /* UNIX mode */
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s32 lock_count; /* file lock count (0=UNLK -1=WRLCK +ve=#RDLCK */
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};
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/*
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* AFS file status change request
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*/
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#define AFS_SET_MTIME 0x01 /* set the mtime */
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#define AFS_SET_OWNER 0x02 /* set the owner ID */
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#define AFS_SET_GROUP 0x04 /* set the group ID (unsupported?) */
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#define AFS_SET_MODE 0x08 /* set the UNIX mode */
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#define AFS_SET_SEG_SIZE 0x10 /* set the segment size (unsupported) */
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/*
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* AFS volume synchronisation information
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*/
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struct afs_volsync {
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time_t creation; /* volume creation time */
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};
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/*
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* AFS volume status record
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*/
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struct afs_volume_status {
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u32 vid; /* volume ID */
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u32 parent_id; /* parent volume ID */
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u8 online; /* true if volume currently online and available */
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u8 in_service; /* true if volume currently in service */
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u8 blessed; /* same as in_service */
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u8 needs_salvage; /* true if consistency checking required */
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u32 type; /* volume type (afs_voltype_t) */
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u32 min_quota; /* minimum space set aside (blocks) */
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u32 max_quota; /* maximum space this volume may occupy (blocks) */
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u32 blocks_in_use; /* space this volume currently occupies (blocks) */
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u32 part_blocks_avail; /* space available in volume's partition */
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u32 part_max_blocks; /* size of volume's partition */
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};
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#define AFS_BLOCK_SIZE 1024
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/*
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* XDR encoding of UUID in AFS.
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*/
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struct afs_uuid__xdr {
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__be32 time_low;
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__be32 time_mid;
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__be32 time_hi_and_version;
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__be32 clock_seq_hi_and_reserved;
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__be32 clock_seq_low;
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__be32 node[6];
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};
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#endif /* AFS_H */
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