1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */ 2*4882a593Smuzhiyun /* AFS fileserver XDR types 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved. 5*4882a593Smuzhiyun * Written by David Howells (dhowells@redhat.com) 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun #ifndef XDR_FS_H 9*4882a593Smuzhiyun #define XDR_FS_H 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun struct afs_xdr_AFSFetchStatus { 12*4882a593Smuzhiyun __be32 if_version; 13*4882a593Smuzhiyun #define AFS_FSTATUS_VERSION 1 14*4882a593Smuzhiyun __be32 type; 15*4882a593Smuzhiyun __be32 nlink; 16*4882a593Smuzhiyun __be32 size_lo; 17*4882a593Smuzhiyun __be32 data_version_lo; 18*4882a593Smuzhiyun __be32 author; 19*4882a593Smuzhiyun __be32 owner; 20*4882a593Smuzhiyun __be32 caller_access; 21*4882a593Smuzhiyun __be32 anon_access; 22*4882a593Smuzhiyun __be32 mode; 23*4882a593Smuzhiyun __be32 parent_vnode; 24*4882a593Smuzhiyun __be32 parent_unique; 25*4882a593Smuzhiyun __be32 seg_size; 26*4882a593Smuzhiyun __be32 mtime_client; 27*4882a593Smuzhiyun __be32 mtime_server; 28*4882a593Smuzhiyun __be32 group; 29*4882a593Smuzhiyun __be32 sync_counter; 30*4882a593Smuzhiyun __be32 data_version_hi; 31*4882a593Smuzhiyun __be32 lock_count; 32*4882a593Smuzhiyun __be32 size_hi; 33*4882a593Smuzhiyun __be32 abort_code; 34*4882a593Smuzhiyun } __packed; 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun #define AFS_DIR_HASHTBL_SIZE 128 37*4882a593Smuzhiyun #define AFS_DIR_DIRENT_SIZE 32 38*4882a593Smuzhiyun #define AFS_DIR_SLOTS_PER_BLOCK 64 39*4882a593Smuzhiyun #define AFS_DIR_BLOCK_SIZE 2048 40*4882a593Smuzhiyun #define AFS_DIR_BLOCKS_PER_PAGE (PAGE_SIZE / AFS_DIR_BLOCK_SIZE) 41*4882a593Smuzhiyun #define AFS_DIR_MAX_SLOTS 65536 42*4882a593Smuzhiyun #define AFS_DIR_BLOCKS_WITH_CTR 128 43*4882a593Smuzhiyun #define AFS_DIR_MAX_BLOCKS 1023 44*4882a593Smuzhiyun #define AFS_DIR_RESV_BLOCKS 1 45*4882a593Smuzhiyun #define AFS_DIR_RESV_BLOCKS0 13 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun /* 48*4882a593Smuzhiyun * Directory entry structure. 49*4882a593Smuzhiyun */ 50*4882a593Smuzhiyun union afs_xdr_dirent { 51*4882a593Smuzhiyun struct { 52*4882a593Smuzhiyun u8 valid; 53*4882a593Smuzhiyun u8 unused[1]; 54*4882a593Smuzhiyun __be16 hash_next; 55*4882a593Smuzhiyun __be32 vnode; 56*4882a593Smuzhiyun __be32 unique; 57*4882a593Smuzhiyun u8 name[16]; 58*4882a593Smuzhiyun u8 overflow[4]; /* if any char of the name (inc 59*4882a593Smuzhiyun * NUL) reaches here, consume 60*4882a593Smuzhiyun * the next dirent too */ 61*4882a593Smuzhiyun } u; 62*4882a593Smuzhiyun u8 extended_name[32]; 63*4882a593Smuzhiyun } __packed; 64*4882a593Smuzhiyun 65*4882a593Smuzhiyun /* 66*4882a593Smuzhiyun * Directory block header (one at the beginning of every 2048-byte block). 67*4882a593Smuzhiyun */ 68*4882a593Smuzhiyun struct afs_xdr_dir_hdr { 69*4882a593Smuzhiyun __be16 npages; 70*4882a593Smuzhiyun __be16 magic; 71*4882a593Smuzhiyun #define AFS_DIR_MAGIC htons(1234) 72*4882a593Smuzhiyun u8 reserved; 73*4882a593Smuzhiyun u8 bitmap[8]; 74*4882a593Smuzhiyun u8 pad[19]; 75*4882a593Smuzhiyun } __packed; 76*4882a593Smuzhiyun 77*4882a593Smuzhiyun /* 78*4882a593Smuzhiyun * Directory block layout 79*4882a593Smuzhiyun */ 80*4882a593Smuzhiyun union afs_xdr_dir_block { 81*4882a593Smuzhiyun struct afs_xdr_dir_hdr hdr; 82*4882a593Smuzhiyun 83*4882a593Smuzhiyun struct { 84*4882a593Smuzhiyun struct afs_xdr_dir_hdr hdr; 85*4882a593Smuzhiyun u8 alloc_ctrs[AFS_DIR_MAX_BLOCKS]; 86*4882a593Smuzhiyun __be16 hashtable[AFS_DIR_HASHTBL_SIZE]; 87*4882a593Smuzhiyun } meta; 88*4882a593Smuzhiyun 89*4882a593Smuzhiyun union afs_xdr_dirent dirents[AFS_DIR_SLOTS_PER_BLOCK]; 90*4882a593Smuzhiyun } __packed; 91*4882a593Smuzhiyun 92*4882a593Smuzhiyun /* 93*4882a593Smuzhiyun * Directory layout on a linux VM page. 94*4882a593Smuzhiyun */ 95*4882a593Smuzhiyun struct afs_xdr_dir_page { 96*4882a593Smuzhiyun union afs_xdr_dir_block blocks[AFS_DIR_BLOCKS_PER_PAGE]; 97*4882a593Smuzhiyun }; 98*4882a593Smuzhiyun 99*4882a593Smuzhiyun #endif /* XDR_FS_H */ 100