[linux-2.6-block.git] / fs / afs / afs.h

/* 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 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 */

typedef unsigned			afs_volid_t;
typedef unsigned			afs_vnodeid_t;
typedef unsigned long long		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;		/* file index within volume */
	unsigned	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 {
	struct afs_fid		fid;		/* file identifier */
	unsigned		version;	/* callback version */
	unsigned		expiry;		/* time at which expires */
	afs_callback_type_t	type;		/* type of callback */
};

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

/*
 * 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 {
	unsigned		if_version;	/* interface version */
#define AFS_FSTATUS_VERSION	1

	afs_file_type_t		type;		/* file type */
	unsigned		nlink;		/* link count */
	u64			size;		/* file size */
	afs_dataversion_t	data_version;	/* current data version */
	u32			author;		/* author ID */
	kuid_t			owner;		/* owner ID */
	kgid_t			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 */
	struct afs_fid		parent;		/* parent dir ID for non-dirs only */
	time_t			mtime_client;	/* last time client changed data */
	time_t			mtime_server;	/* last time server changed data */
	s32			lock_count;	/* file lock count (0=UNLK -1=WRLCK +ve=#RDLCK */
};

/*
 * 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 {
	time_t			creation;	/* volume creation time */
};

/*
 * AFS volume status record
 */
struct afs_volume_status {
	u32			vid;		/* volume ID */
	u32			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) */
	u32			min_quota;	/* minimum space set aside (blocks) */
	u32			max_quota;	/* maximum space this volume may occupy (blocks) */
	u32			blocks_in_use;	/* space this volume currently occupies (blocks) */
	u32			part_blocks_avail; /* space available in volume's partition */
	u32			part_max_blocks; /* size of volume's partition */
};

#define AFS_BLOCK_SIZE	1024

#endif /* AFS_H */
Commit	Line	Data
08e0e7c8	1	/* AFS common types
1da177e4	2	*
08e0e7c8	3	* Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
1da177e4 LT	4	* Written by David Howells (dhowells@redhat.com)
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* as published by the Free Software Foundation; either version
	9	* 2 of the License, or (at your option) any later version.
	10	*/
	11
08e0e7c8 DH	12	#ifndef AFS_H
08e0e7c8 DH	13	#define AFS_H
1da177e4	14
08e0e7c8	15	#include <linux/in.h>
1da177e4	16
00d3b7a4 DH	17	#define AFS_MAXCELLNAME 64 /* maximum length of a cell name */
00d3b7a4 DH	18	#define AFS_MAXVOLNAME 64 /* maximum length of a volume name */
45222b9e DH	19	#define AFSNAMEMAX 256 /* maximum length of a filename plus NUL */
	20	#define AFSPATHMAX 1024 /* maximum length of a pathname plus NUL */
	21	#define AFSOPAQUEMAX 1024 /* maximum length of an opaque field */
00d3b7a4	22
1da177e4 LT	23	typedef unsigned afs_volid_t;
	24	typedef unsigned afs_vnodeid_t;
	25	typedef unsigned long long afs_dataversion_t;
	26
	27	typedef enum {
	28	AFSVL_RWVOL, /* read/write volume */
	29	AFSVL_ROVOL, /* read-only volume */
	30	AFSVL_BACKVOL, /* backup volume */
	31	} __attribute__((packed)) afs_voltype_t;
	32
	33	typedef enum {
	34	AFS_FTYPE_INVALID = 0,
	35	AFS_FTYPE_FILE = 1,
	36	AFS_FTYPE_DIR = 2,
	37	AFS_FTYPE_SYMLINK = 3,
	38	} afs_file_type_t;
	39
e8d6c554 DH	40	typedef enum {
	41	AFS_LOCK_READ = 0, /* read lock request */
	42	AFS_LOCK_WRITE = 1, /* write lock request */
	43	} afs_lock_type_t;
	44
	45	#define AFS_LOCKWAIT (5 * 60) /* time until a lock times out (seconds) */
	46
1da177e4 LT	47	/*
	48	* AFS file identifier
	49	*/
ec26815a	50	struct afs_fid {
1da177e4 LT	51	afs_volid_t vid; /* volume ID */
	52	afs_vnodeid_t vnode; /* file index within volume */
	53	unsigned unique; /* unique ID number (file index version) */
	54	};
	55
1da177e4 LT	56	/*
	57	* AFS callback notification
	58	*/
	59	typedef enum {
	60	AFSCM_CB_UNTYPED = 0, /* no type set on CB break */
	61	AFSCM_CB_EXCLUSIVE = 1, /* CB exclusive to CM [not implemented] */
	62	AFSCM_CB_SHARED = 2, /* CB shared by other CM's */
	63	AFSCM_CB_DROPPED = 3, /* CB promise cancelled by file server */
	64	} afs_callback_type_t;
	65
ec26815a	66	struct afs_callback {
1da177e4 LT	67	struct afs_fid fid; /* file identifier */
	68	unsigned version; /* callback version */
	69	unsigned expiry; /* time at which expires */
	70	afs_callback_type_t type; /* type of callback */
	71	};
	72
08e0e7c8	73	#define AFSCBMAX 50 /* maximum callbacks transferred per bulk op */
1da177e4	74
1da177e4 LT	75	/*
	76	* AFS volume information
	77	*/
ec26815a	78	struct afs_volume_info {
1da177e4 LT	79	afs_volid_t vid; /* volume ID */
	80	afs_voltype_t type; /* type of this volume */
	81	afs_volid_t type_vids[5]; /* volume ID's for possible types for this vol */
08e0e7c8	82
1da177e4 LT	83	/* list of fileservers serving this volume */
	84	size_t nservers; /* number of entries used in servers[] */
	85	struct {
	86	struct in_addr addr; /* fileserver address */
	87	} servers[8];
	88	};
	89
00d3b7a4 DH	90	/*
	91	* AFS security ACE access mask
	92	*/
	93	typedef u32 afs_access_t;
	94	#define AFS_ACE_READ 0x00000001U /* - permission to read a file/dir */
	95	#define AFS_ACE_WRITE 0x00000002U /* - permission to write/chmod a file */
	96	#define AFS_ACE_INSERT 0x00000004U /* - permission to create dirent in a dir */
	97	#define AFS_ACE_LOOKUP 0x00000008U /* - permission to lookup a file/dir in a dir */
	98	#define AFS_ACE_DELETE 0x00000010U /* - permission to delete a dirent from a dir */
	99	#define AFS_ACE_LOCK 0x00000020U /* - permission to lock a file */
	100	#define AFS_ACE_ADMINISTER 0x00000040U /* - permission to change ACL */
	101	#define AFS_ACE_USER_A 0x01000000U /* - 'A' user-defined permission */
	102	#define AFS_ACE_USER_B 0x02000000U /* - 'B' user-defined permission */
	103	#define AFS_ACE_USER_C 0x04000000U /* - 'C' user-defined permission */
	104	#define AFS_ACE_USER_D 0x08000000U /* - 'D' user-defined permission */
	105	#define AFS_ACE_USER_E 0x10000000U /* - 'E' user-defined permission */
	106	#define AFS_ACE_USER_F 0x20000000U /* - 'F' user-defined permission */
	107	#define AFS_ACE_USER_G 0x40000000U /* - 'G' user-defined permission */
	108	#define AFS_ACE_USER_H 0x80000000U /* - 'H' user-defined permission */
	109
1da177e4 LT	110	/*
	111	* AFS file status information
	112	*/
ec26815a	113	struct afs_file_status {
1da177e4 LT	114	unsigned if_version; /* interface version */
	115	#define AFS_FSTATUS_VERSION 1
	116
	117	afs_file_type_t type; /* file type */
	118	unsigned nlink; /* link count */
260a9803	119	u64 size; /* file size */
08e0e7c8	120	afs_dataversion_t data_version; /* current data version */
260a9803	121	u32 author; /* author ID */
a0a5386a EB	122	kuid_t owner; /* owner ID */
a0a5386a EB	123	kgid_t group; /* group ID */
00d3b7a4 DH	124	afs_access_t caller_access; /* access rights for authenticated caller */
00d3b7a4 DH	125	afs_access_t anon_access; /* access rights for unauthenticated caller */
1da177e4	126	umode_t mode; /* UNIX mode */
260a9803	127	struct afs_fid parent; /* parent dir ID for non-dirs only */
1da177e4 LT	128	time_t mtime_client; /* last time client changed data */
1da177e4 LT	129	time_t mtime_server; /* last time server changed data */
e8d6c554	130	s32 lock_count; /* file lock count (0=UNLK -1=WRLCK +ve=#RDLCK */
1da177e4 LT	131	};
1da177e4 LT	132
260a9803 DH	133	/*
	134	* AFS file status change request
	135	*/
260a9803 DH	136
	137	#define AFS_SET_MTIME 0x01 /* set the mtime */
	138	#define AFS_SET_OWNER 0x02 /* set the owner ID */
	139	#define AFS_SET_GROUP 0x04 /* set the group ID (unsupported?) */
	140	#define AFS_SET_MODE 0x08 /* set the UNIX mode */
	141	#define AFS_SET_SEG_SIZE 0x10 /* set the segment size (unsupported) */
	142
1da177e4 LT	143	/*
	144	* AFS volume synchronisation information
	145	*/
ec26815a	146	struct afs_volsync {
1da177e4 LT	147	time_t creation; /* volume creation time */
	148	};
	149
45222b9e DH	150	/*
	151	* AFS volume status record
	152	*/
	153	struct afs_volume_status {
	154	u32 vid; /* volume ID */
	155	u32 parent_id; /* parent volume ID */
	156	u8 online; /* true if volume currently online and available */
	157	u8 in_service; /* true if volume currently in service */
	158	u8 blessed; /* same as in_service */
	159	u8 needs_salvage; /* true if consistency checking required */
	160	u32 type; /* volume type (afs_voltype_t) */
	161	u32 min_quota; /* minimum space set aside (blocks) */
	162	u32 max_quota; /* maximum space this volume may occupy (blocks) */
	163	u32 blocks_in_use; /* space this volume currently occupies (blocks) */
	164	u32 part_blocks_avail; /* space available in volume's partition */
	165	u32 part_max_blocks; /* size of volume's partition */
	166	};
	167
	168	#define AFS_BLOCK_SIZE 1024
	169
08e0e7c8	170	#endif /* AFS_H */