/* SPDX-License-Identifier: GPL-2.0-or-later */
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/* AFS fileserver XDR types
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*
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* Copyright (C) 2018 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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#ifndef XDR_FS_H
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#define XDR_FS_H
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struct afs_xdr_AFSFetchStatus {
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__be32 if_version;
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#define AFS_FSTATUS_VERSION 1
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__be32 type;
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__be32 nlink;
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__be32 size_lo;
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__be32 data_version_lo;
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__be32 author;
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__be32 owner;
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__be32 caller_access;
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__be32 anon_access;
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__be32 mode;
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__be32 parent_vnode;
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__be32 parent_unique;
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__be32 seg_size;
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__be32 mtime_client;
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__be32 mtime_server;
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__be32 group;
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__be32 sync_counter;
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__be32 data_version_hi;
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__be32 lock_count;
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__be32 size_hi;
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__be32 abort_code;
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} __packed;
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#define AFS_DIR_HASHTBL_SIZE 128
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#define AFS_DIR_DIRENT_SIZE 32
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#define AFS_DIR_SLOTS_PER_BLOCK 64
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#define AFS_DIR_BLOCK_SIZE 2048
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#define AFS_DIR_BLOCKS_PER_PAGE (PAGE_SIZE / AFS_DIR_BLOCK_SIZE)
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#define AFS_DIR_MAX_SLOTS 65536
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#define AFS_DIR_BLOCKS_WITH_CTR 128
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#define AFS_DIR_MAX_BLOCKS 1023
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#define AFS_DIR_RESV_BLOCKS 1
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#define AFS_DIR_RESV_BLOCKS0 13
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/*
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* Directory entry structure.
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*/
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union afs_xdr_dirent {
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struct {
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u8 valid;
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u8 unused[1];
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__be16 hash_next;
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__be32 vnode;
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__be32 unique;
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u8 name[16];
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u8 overflow[4]; /* if any char of the name (inc
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* NUL) reaches here, consume
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* the next dirent too */
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} u;
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u8 extended_name[32];
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} __packed;
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/*
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* Directory block header (one at the beginning of every 2048-byte block).
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*/
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struct afs_xdr_dir_hdr {
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__be16 npages;
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__be16 magic;
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#define AFS_DIR_MAGIC htons(1234)
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u8 reserved;
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u8 bitmap[8];
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u8 pad[19];
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} __packed;
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/*
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* Directory block layout
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*/
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union afs_xdr_dir_block {
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struct afs_xdr_dir_hdr hdr;
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struct {
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struct afs_xdr_dir_hdr hdr;
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u8 alloc_ctrs[AFS_DIR_MAX_BLOCKS];
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__be16 hashtable[AFS_DIR_HASHTBL_SIZE];
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} meta;
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union afs_xdr_dirent dirents[AFS_DIR_SLOTS_PER_BLOCK];
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} __packed;
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/*
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* Directory layout on a linux VM page.
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*/
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struct afs_xdr_dir_page {
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union afs_xdr_dir_block blocks[AFS_DIR_BLOCKS_PER_PAGE];
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};
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#endif /* XDR_FS_H */
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