1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* AFS common types
3 *
4 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8 #ifndef AFS_H
9 #define AFS_H
10
11 #include <linux/in.h>
12
13 #define AFS_MAXCELLNAME 64 /* Maximum length of a cell name */
14 #define AFS_MAXVOLNAME 64 /* Maximum length of a volume name */
15 #define AFS_MAXNSERVERS 8 /* Maximum servers in a basic volume record */
16 #define AFS_NMAXNSERVERS 13 /* Maximum servers in a N/U-class volume record */
17 #define AFS_MAXTYPES 3 /* Maximum number of volume types */
18 #define AFSNAMEMAX 256 /* Maximum length of a filename plus NUL */
19 #define AFSPATHMAX 1024 /* Maximum length of a pathname plus NUL */
20 #define AFSOPAQUEMAX 1024 /* Maximum length of an opaque field */
21
22 #define AFS_VL_MAX_LIFESPAN (120 * HZ)
23 #define AFS_PROBE_MAX_LIFESPAN (30 * HZ)
24
25 typedef u64 afs_volid_t;
26 typedef u64 afs_vnodeid_t;
27 typedef u64 afs_dataversion_t;
28
29 typedef enum {
30 AFSVL_RWVOL, /* read/write volume */
31 AFSVL_ROVOL, /* read-only volume */
32 AFSVL_BACKVOL, /* backup volume */
33 } __attribute__((packed)) afs_voltype_t;
34
35 typedef enum {
36 AFS_FTYPE_INVALID = 0,
37 AFS_FTYPE_FILE = 1,
38 AFS_FTYPE_DIR = 2,
39 AFS_FTYPE_SYMLINK = 3,
40 } afs_file_type_t;
41
42 typedef enum {
43 AFS_LOCK_READ = 0, /* read lock request */
44 AFS_LOCK_WRITE = 1, /* write lock request */
45 } afs_lock_type_t;
46
47 #define AFS_LOCKWAIT (5 * 60) /* time until a lock times out (seconds) */
48
49 /*
50 * AFS file identifier
51 */
52 struct afs_fid {
53 afs_volid_t vid; /* volume ID */
54 afs_vnodeid_t vnode; /* Lower 64-bits of file index within volume */
55 u32 vnode_hi; /* Upper 32-bits of file index */
56 u32 unique; /* unique ID number (file index version) */
57 };
58
59 /*
60 * AFS callback notification
61 */
62 typedef enum {
63 AFSCM_CB_UNTYPED = 0, /* no type set on CB break */
64 AFSCM_CB_EXCLUSIVE = 1, /* CB exclusive to CM [not implemented] */
65 AFSCM_CB_SHARED = 2, /* CB shared by other CM's */
66 AFSCM_CB_DROPPED = 3, /* CB promise cancelled by file server */
67 } afs_callback_type_t;
68
69 struct afs_callback {
70 time64_t expires_at; /* Time at which expires */
71 //unsigned version; /* Callback version */
72 //afs_callback_type_t type; /* Type of callback */
73 };
74
75 struct afs_callback_break {
76 struct afs_fid fid; /* File identifier */
77 //struct afs_callback cb; /* Callback details */
78 };
79
80 #define AFSCBMAX 50 /* maximum callbacks transferred per bulk op */
81
82 struct afs_uuid {
83 __be32 time_low; /* low part of timestamp */
84 __be16 time_mid; /* mid part of timestamp */
85 __be16 time_hi_and_version; /* high part of timestamp and version */
86 __s8 clock_seq_hi_and_reserved; /* clock seq hi and variant */
87 __s8 clock_seq_low; /* clock seq low */
88 __s8 node[6]; /* spatially unique node ID (MAC addr) */
89 };
90
91 /*
92 * AFS volume information
93 */
94 struct afs_volume_info {
95 afs_volid_t vid; /* volume ID */
96 afs_voltype_t type; /* type of this volume */
97 afs_volid_t type_vids[5]; /* volume ID's for possible types for this vol */
98
99 /* list of fileservers serving this volume */
100 size_t nservers; /* number of entries used in servers[] */
101 struct {
102 struct in_addr addr; /* fileserver address */
103 } servers[8];
104 };
105
106 /*
107 * AFS security ACE access mask
108 */
109 typedef u32 afs_access_t;
110 #define AFS_ACE_READ 0x00000001U /* - permission to read a file/dir */
111 #define AFS_ACE_WRITE 0x00000002U /* - permission to write/chmod a file */
112 #define AFS_ACE_INSERT 0x00000004U /* - permission to create dirent in a dir */
113 #define AFS_ACE_LOOKUP 0x00000008U /* - permission to lookup a file/dir in a dir */
114 #define AFS_ACE_DELETE 0x00000010U /* - permission to delete a dirent from a dir */
115 #define AFS_ACE_LOCK 0x00000020U /* - permission to lock a file */
116 #define AFS_ACE_ADMINISTER 0x00000040U /* - permission to change ACL */
117 #define AFS_ACE_USER_A 0x01000000U /* - 'A' user-defined permission */
118 #define AFS_ACE_USER_B 0x02000000U /* - 'B' user-defined permission */
119 #define AFS_ACE_USER_C 0x04000000U /* - 'C' user-defined permission */
120 #define AFS_ACE_USER_D 0x08000000U /* - 'D' user-defined permission */
121 #define AFS_ACE_USER_E 0x10000000U /* - 'E' user-defined permission */
122 #define AFS_ACE_USER_F 0x20000000U /* - 'F' user-defined permission */
123 #define AFS_ACE_USER_G 0x40000000U /* - 'G' user-defined permission */
124 #define AFS_ACE_USER_H 0x80000000U /* - 'H' user-defined permission */
125
126 /*
127 * AFS file status information
128 */
129 struct afs_file_status {
130 u64 size; /* file size */
131 afs_dataversion_t data_version; /* current data version */
132 struct timespec64 mtime_client; /* Last time client changed data */
133 struct timespec64 mtime_server; /* Last time server changed data */
134 s64 author; /* author ID */
135 s64 owner; /* owner ID */
136 s64 group; /* group ID */
137 afs_access_t caller_access; /* access rights for authenticated caller */
138 afs_access_t anon_access; /* access rights for unauthenticated caller */
139 umode_t mode; /* UNIX mode */
140 afs_file_type_t type; /* file type */
141 u32 nlink; /* link count */
142 s32 lock_count; /* file lock count (0=UNLK -1=WRLCK +ve=#RDLCK */
143 u32 abort_code; /* Abort if bulk-fetching this failed */
144 };
145
146 struct afs_status_cb {
147 struct afs_file_status status;
148 struct afs_callback callback;
149 unsigned int cb_break; /* Pre-op callback break counter */
150 bool have_status; /* True if status record was retrieved */
151 bool have_cb; /* True if cb record was retrieved */
152 bool have_error; /* True if status.abort_code indicates an error */
153 };
154
155 /*
156 * AFS file status change request
157 */
158
159 #define AFS_SET_MTIME 0x01 /* set the mtime */
160 #define AFS_SET_OWNER 0x02 /* set the owner ID */
161 #define AFS_SET_GROUP 0x04 /* set the group ID (unsupported?) */
162 #define AFS_SET_MODE 0x08 /* set the UNIX mode */
163 #define AFS_SET_SEG_SIZE 0x10 /* set the segment size (unsupported) */
164
165 /*
166 * AFS volume synchronisation information
167 */
168 struct afs_volsync {
169 time64_t creation; /* volume creation time */
170 };
171
172 /*
173 * AFS volume status record
174 */
175 struct afs_volume_status {
176 afs_volid_t vid; /* volume ID */
177 afs_volid_t parent_id; /* parent volume ID */
178 u8 online; /* true if volume currently online and available */
179 u8 in_service; /* true if volume currently in service */
180 u8 blessed; /* same as in_service */
181 u8 needs_salvage; /* true if consistency checking required */
182 u32 type; /* volume type (afs_voltype_t) */
183 u64 min_quota; /* minimum space set aside (blocks) */
184 u64 max_quota; /* maximum space this volume may occupy (blocks) */
185 u64 blocks_in_use; /* space this volume currently occupies (blocks) */
186 u64 part_blocks_avail; /* space available in volume's partition */
187 u64 part_max_blocks; /* size of volume's partition */
188 s64 vol_copy_date;
189 s64 vol_backup_date;
190 };
191
192 #define AFS_BLOCK_SIZE 1024
193
194 /*
195 * XDR encoding of UUID in AFS.
196 */
197 struct afs_uuid__xdr {
198 __be32 time_low;
199 __be32 time_mid;
200 __be32 time_hi_and_version;
201 __be32 clock_seq_hi_and_reserved;
202 __be32 clock_seq_low;
203 __be32 node[6];
204 };
205
206 #endif /* AFS_H */