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/* AFS fileserver XDR types
*
* Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
#ifndef XDR_FS_H
#define XDR_FS_H
struct afs_xdr_AFSFetchStatus {
__be32 if_version;
#define AFS_FSTATUS_VERSION 1
__be32 type;
__be32 nlink;
__be32 size_lo;
__be32 data_version_lo;
__be32 author;
__be32 owner;
__be32 caller_access;
__be32 anon_access;
__be32 mode;
__be32 parent_vnode;
__be32 parent_unique;
__be32 seg_size;
__be32 mtime_client;
__be32 mtime_server;
__be32 group;
__be32 sync_counter;
__be32 data_version_hi;
__be32 lock_count;
__be32 size_hi;
__be32 abort_code;
} __packed;
#define AFS_DIR_HASHTBL_SIZE 128
#define AFS_DIR_DIRENT_SIZE 32
#define AFS_DIR_SLOTS_PER_BLOCK 64
#define AFS_DIR_BLOCK_SIZE 2048
#define AFS_DIR_BLOCKS_PER_PAGE (PAGE_SIZE / AFS_DIR_BLOCK_SIZE)
#define AFS_DIR_MAX_SLOTS 65536
#define AFS_DIR_BLOCKS_WITH_CTR 128
#define AFS_DIR_MAX_BLOCKS 1023
#define AFS_DIR_RESV_BLOCKS 1
#define AFS_DIR_RESV_BLOCKS0 13
/*
* Directory entry structure.
*/
union afs_dirent {
struct {
uint8_t valid;
uint8_t unused[1];
__be16 hash_next;
__be32 vnode;
__be32 unique;
uint8_t name[16];
uint8_t overflow[4]; /* if any char of the name (inc
* NUL) reaches here, consume
* the next dirent too */
} u;
uint8_t extended_name[32];
};
/*
* Directory page header (one at the beginning of every 2048-byte chunk).
*/
struct afs_dir_pagehdr {
__be16 npages;
__be16 magic;
#define AFS_DIR_MAGIC htons(1234)
uint8_t reserved;
uint8_t bitmap[8];
uint8_t pad[19];
};
/*
* Directory block layout
*/
union afs_dir_block {
struct afs_dir_pagehdr pagehdr;
struct {
struct afs_dir_pagehdr pagehdr;
uint8_t alloc_ctrs[AFS_DIR_MAX_BLOCKS];
__be16 hashtable[AFS_DIR_HASHTBL_SIZE];
} hdr;
union afs_dirent dirents[AFS_DIR_SLOTS_PER_BLOCK];
};
/*
* Directory layout on a linux VM page.
*/
struct afs_dir_page {
union afs_dir_block blocks[AFS_DIR_BLOCKS_PER_PAGE];
};
#endif /* XDR_FS_H */
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