summaryrefslogtreecommitdiff
path: root/fs/afs/afs.h
blob: 8fa0dffff1cc3cb51be0d40c7b05d67243382dce (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
/* AFS common types
 *
 * Copyright (C) 2002, 2007 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 License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#ifndef AFS_H
#define AFS_H

#include <linux/in.h>

#define AFS_MAXCELLNAME		64  	/* Maximum length of a cell name */
#define AFS_MAXVOLNAME		64  	/* Maximum length of a volume name */
#define AFS_MAXNSERVERS		8   	/* Maximum servers in a basic volume record */
#define AFS_NMAXNSERVERS	13  	/* Maximum servers in a N/U-class volume record */
#define AFS_MAXTYPES		3	/* Maximum number of volume types */
#define AFSNAMEMAX		256 	/* Maximum length of a filename plus NUL */
#define AFSPATHMAX		1024	/* Maximum length of a pathname plus NUL */
#define AFSOPAQUEMAX		1024	/* Maximum length of an opaque field */

#define AFS_VL_MAX_LIFESPAN	(120 * HZ)
#define AFS_PROBE_MAX_LIFESPAN	(30 * HZ)

typedef u64			afs_volid_t;
typedef u64			afs_vnodeid_t;
typedef u64			afs_dataversion_t;

typedef enum {
	AFSVL_RWVOL,			/* read/write volume */
	AFSVL_ROVOL,			/* read-only volume */
	AFSVL_BACKVOL,			/* backup volume */
} __attribute__((packed)) afs_voltype_t;

typedef enum {
	AFS_FTYPE_INVALID	= 0,
	AFS_FTYPE_FILE		= 1,
	AFS_FTYPE_DIR		= 2,
	AFS_FTYPE_SYMLINK	= 3,
} afs_file_type_t;

typedef enum {
	AFS_LOCK_READ		= 0,	/* read lock request */
	AFS_LOCK_WRITE		= 1,	/* write lock request */
} afs_lock_type_t;

#define AFS_LOCKWAIT		(5 * 60) /* time until a lock times out (seconds) */

/*
 * AFS file identifier
 */
struct afs_fid {
	afs_volid_t	vid;		/* volume ID */
	afs_vnodeid_t	vnode;		/* Lower 64-bits of file index within volume */
	u32		vnode_hi;	/* Upper 32-bits of file index */
	u32		unique;		/* unique ID number (file index version) */
};

/*
 * AFS callback notification
 */
typedef enum {
	AFSCM_CB_UNTYPED	= 0,	/* no type set on CB break */
	AFSCM_CB_EXCLUSIVE	= 1,	/* CB exclusive to CM [not implemented] */
	AFSCM_CB_SHARED		= 2,	/* CB shared by other CM's */
	AFSCM_CB_DROPPED	= 3,	/* CB promise cancelled by file server */
} afs_callback_type_t;

struct afs_callback {
	time64_t		expires_at;	/* Time at which expires */
	unsigned		version;	/* Callback version */
	afs_callback_type_t	type;		/* Type of callback */
};

struct afs_callback_break {
	struct afs_fid		fid;		/* File identifier */
	//struct afs_callback	cb;		/* Callback details */
};

#define AFSCBMAX 50	/* maximum callbacks transferred per bulk op */

struct afs_uuid {
	__be32		time_low;			/* low part of timestamp */
	__be16		time_mid;			/* mid part of timestamp */
	__be16		time_hi_and_version;		/* high part of timestamp and version  */
	__s8		clock_seq_hi_and_reserved;	/* clock seq hi and variant */
	__s8		clock_seq_low;			/* clock seq low */
	__s8		node[6];			/* spatially unique node ID (MAC addr) */
};

/*
 * AFS volume information
 */
struct afs_volume_info {
	afs_volid_t		vid;		/* volume ID */
	afs_voltype_t		type;		/* type of this volume */
	afs_volid_t		type_vids[5];	/* volume ID's for possible types for this vol */

	/* list of fileservers serving this volume */
	size_t			nservers;	/* number of entries used in servers[] */
	struct {
		struct in_addr	addr;		/* fileserver address */
	} servers[8];
};

/*
 * AFS security ACE access mask
 */
typedef u32 afs_access_t;
#define AFS_ACE_READ		0x00000001U	/* - permission to read a file/dir */
#define AFS_ACE_WRITE		0x00000002U	/* - permission to write/chmod a file */
#define AFS_ACE_INSERT		0x00000004U	/* - permission to create dirent in a dir */
#define AFS_ACE_LOOKUP		0x00000008U	/* - permission to lookup a file/dir in a dir */
#define AFS_ACE_DELETE		0x00000010U	/* - permission to delete a dirent from a dir */
#define AFS_ACE_LOCK		0x00000020U	/* - permission to lock a file */
#define AFS_ACE_ADMINISTER	0x00000040U	/* - permission to change ACL */
#define AFS_ACE_USER_A		0x01000000U	/* - 'A' user-defined permission */
#define AFS_ACE_USER_B		0x02000000U	/* - 'B' user-defined permission */
#define AFS_ACE_USER_C		0x04000000U	/* - 'C' user-defined permission */
#define AFS_ACE_USER_D		0x08000000U	/* - 'D' user-defined permission */
#define AFS_ACE_USER_E		0x10000000U	/* - 'E' user-defined permission */
#define AFS_ACE_USER_F		0x20000000U	/* - 'F' user-defined permission */
#define AFS_ACE_USER_G		0x40000000U	/* - 'G' user-defined permission */
#define AFS_ACE_USER_H		0x80000000U	/* - 'H' user-defined permission */

/*
 * AFS file status information
 */
struct afs_file_status {
	u64			size;		/* file size */
	afs_dataversion_t	data_version;	/* current data version */
	struct timespec64	mtime_client;	/* Last time client changed data */
	struct timespec64	mtime_server;	/* Last time server changed data */
	s64			author;		/* author ID */
	s64			owner;		/* owner ID */
	s64			group;		/* group ID */
	afs_access_t		caller_access;	/* access rights for authenticated caller */
	afs_access_t		anon_access;	/* access rights for unauthenticated caller */
	umode_t			mode;		/* UNIX mode */
	afs_file_type_t		type;		/* file type */
	u32			nlink;		/* link count */
	s32			lock_count;	/* file lock count (0=UNLK -1=WRLCK +ve=#RDLCK */
	u32			abort_code;	/* Abort if bulk-fetching this failed */
};

struct afs_status_cb {
	struct afs_file_status	status;
	struct afs_callback	callback;
	bool			have_cb;	/* True if cb record was retrieved */
};

/*
 * AFS file status change request
 */

#define AFS_SET_MTIME		0x01		/* set the mtime */
#define AFS_SET_OWNER		0x02		/* set the owner ID */
#define AFS_SET_GROUP		0x04		/* set the group ID (unsupported?) */
#define AFS_SET_MODE		0x08		/* set the UNIX mode */
#define AFS_SET_SEG_SIZE	0x10		/* set the segment size (unsupported) */

/*
 * AFS volume synchronisation information
 */
struct afs_volsync {
	time64_t		creation;	/* volume creation time */
};

/*
 * AFS volume status record
 */
struct afs_volume_status {
	afs_volid_t		vid;		/* volume ID */
	afs_volid_t		parent_id;	/* parent volume ID */
	u8			online;		/* true if volume currently online and available */
	u8			in_service;	/* true if volume currently in service */
	u8			blessed;	/* same as in_service */
	u8			needs_salvage;	/* true if consistency checking required */
	u32			type;		/* volume type (afs_voltype_t) */
	u64			min_quota;	/* minimum space set aside (blocks) */
	u64			max_quota;	/* maximum space this volume may occupy (blocks) */
	u64			blocks_in_use;	/* space this volume currently occupies (blocks) */
	u64			part_blocks_avail; /* space available in volume's partition */
	u64			part_max_blocks; /* size of volume's partition */
	s64			vol_copy_date;
	s64			vol_backup_date;
};

#define AFS_BLOCK_SIZE	1024

/*
 * XDR encoding of UUID in AFS.
 */
struct afs_uuid__xdr {
	__be32		time_low;
	__be32		time_mid;
	__be32		time_hi_and_version;
	__be32		clock_seq_hi_and_reserved;
	__be32		clock_seq_low;
	__be32		node[6];
};

#endif /* AFS_H */