projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b4d0d230 | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| dd9fbcb8 DH |
2 | /* AFS fileserver XDR types |
| 3 | * | |
| 4 | * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved. | |
| 5 | * Written by David Howells (dhowells@redhat.com) | |
| dd9fbcb8 DH |
6 | */ |
| 7 | ||
| 8 | #ifndef XDR_FS_H | |
| 9 | #define XDR_FS_H | |
| 10 | ||
| 11 | struct afs_xdr_AFSFetchStatus { | |
| 12 | __be32 if_version; | |
| 13 | #define AFS_FSTATUS_VERSION 1 | |
| 14 | __be32 type; | |
| 15 | __be32 nlink; | |
| 16 | __be32 size_lo; | |
| 17 | __be32 data_version_lo; | |
| 18 | __be32 author; | |
| 19 | __be32 owner; | |
| 20 | __be32 caller_access; | |
| 21 | __be32 anon_access; | |
| 22 | __be32 mode; | |
| 23 | __be32 parent_vnode; | |
| 24 | __be32 parent_unique; | |
| 25 | __be32 seg_size; | |
| 26 | __be32 mtime_client; | |
| 27 | __be32 mtime_server; | |
| 28 | __be32 group; | |
| 29 | __be32 sync_counter; | |
| 30 | __be32 data_version_hi; | |
| 31 | __be32 lock_count; | |
| 32 | __be32 size_hi; | |
| 33 | __be32 abort_code; | |
| 34 | } __packed; | |
| 35 | ||
| 4ea219a8 DH |
36 | #define AFS_DIR_HASHTBL_SIZE 128 |
| 37 | #define AFS_DIR_DIRENT_SIZE 32 | |
| 38 | #define AFS_DIR_SLOTS_PER_BLOCK 64 | |
| 39 | #define AFS_DIR_BLOCK_SIZE 2048 | |
| 40 | #define AFS_DIR_BLOCKS_PER_PAGE (PAGE_SIZE / AFS_DIR_BLOCK_SIZE) | |
| 41 | #define AFS_DIR_MAX_SLOTS 65536 | |
| 42 | #define AFS_DIR_BLOCKS_WITH_CTR 128 | |
| 43 | #define AFS_DIR_MAX_BLOCKS 1023 | |
| 44 | #define AFS_DIR_RESV_BLOCKS 1 | |
| 45 | #define AFS_DIR_RESV_BLOCKS0 13 | |
| 46 | ||
| 47 | /* | |
| 48 | * Directory entry structure. | |
| 49 | */ | |
| 00317636 | 50 | union afs_xdr_dirent { |
| 4ea219a8 | 51 | struct { |
| 00317636 DH |
52 | u8 valid; |
| 53 | u8 unused[1]; | |
| 4ea219a8 DH |
54 | __be16 hash_next; |
| 55 | __be32 vnode; | |
| 56 | __be32 unique; | |
| 00317636 DH |
57 | u8 name[16]; |
| 58 | u8 overflow[4]; /* if any char of the name (inc | |
| 4ea219a8 DH |
59 | * NUL) reaches here, consume |
| 60 | * the next dirent too */ | |
| 61 | } u; | |
| 00317636 DH |
62 | u8 extended_name[32]; |
| 63 | } __packed; | |
| 4ea219a8 DH |
64 | |
| 65 | /* | |
| 00317636 | 66 | * Directory block header (one at the beginning of every 2048-byte block). |
| 4ea219a8 | 67 | */ |
| 00317636 | 68 | struct afs_xdr_dir_hdr { |
| 4ea219a8 DH |
69 | __be16 npages; |
| 70 | __be16 magic; | |
| 71 | #define AFS_DIR_MAGIC htons(1234) | |
| 00317636 DH |
72 | u8 reserved; |
| 73 | u8 bitmap[8]; | |
| 74 | u8 pad[19]; | |
| 75 | } __packed; | |
| 4ea219a8 DH |
76 | |
| 77 | /* | |
| 78 | * Directory block layout | |
| 79 | */ | |
| 00317636 DH |
80 | union afs_xdr_dir_block { |
| 81 | struct afs_xdr_dir_hdr hdr; | |
| 4ea219a8 DH |
82 | |
| 83 | struct { | |
| 00317636 DH |
84 | struct afs_xdr_dir_hdr hdr; |
| 85 | u8 alloc_ctrs[AFS_DIR_MAX_BLOCKS]; | |
| 4ea219a8 | 86 | __be16 hashtable[AFS_DIR_HASHTBL_SIZE]; |
| 00317636 | 87 | } meta; |
| 4ea219a8 | 88 | |
| 00317636 DH |
89 | union afs_xdr_dirent dirents[AFS_DIR_SLOTS_PER_BLOCK]; |
| 90 | } __packed; | |
| 4ea219a8 DH |
91 | |
| 92 | /* | |
| 93 | * Directory layout on a linux VM page. | |
| 94 | */ | |
| 00317636 DH |
95 | struct afs_xdr_dir_page { |
| 96 | union afs_xdr_dir_block blocks[AFS_DIR_BLOCKS_PER_PAGE]; | |
| 4ea219a8 DH |
97 | }; |
| 98 | ||
| dd9fbcb8 | 99 | #endif /* XDR_FS_H */ |