[net-next-2.6.git] / fs / nfs / callback.h

/*
 * linux/fs/nfs/callback.h
 *
 * Copyright (C) 2004 Trond Myklebust
 *
 * NFSv4 callback definitions
 */
#ifndef __LINUX_FS_NFS_CALLBACK_H
#define __LINUX_FS_NFS_CALLBACK_H

#define NFS4_CALLBACK 0x40000000
#define NFS4_CALLBACK_XDRSIZE 2048
#define NFS4_CALLBACK_BUFSIZE (1024 + NFS4_CALLBACK_XDRSIZE)

enum nfs4_callback_procnum {
	CB_NULL = 0,
	CB_COMPOUND = 1,
};

enum nfs4_callback_opnum {
	OP_CB_GETATTR = 3,
	OP_CB_RECALL  = 4,
/* Callback operations new to NFSv4.1 */
	OP_CB_LAYOUTRECALL  = 5,
	OP_CB_NOTIFY        = 6,
	OP_CB_PUSH_DELEG    = 7,
	OP_CB_RECALL_ANY    = 8,
	OP_CB_RECALLABLE_OBJ_AVAIL = 9,
	OP_CB_RECALL_SLOT   = 10,
	OP_CB_SEQUENCE      = 11,
	OP_CB_WANTS_CANCELLED = 12,
	OP_CB_NOTIFY_LOCK   = 13,
	OP_CB_ILLEGAL = 10044,
};

struct cb_compound_hdr_arg {
	unsigned int taglen;
	const char *tag;
	unsigned int minorversion;
	unsigned nops;
};

struct cb_compound_hdr_res {
	__be32 *status;
	unsigned int taglen;
	const char *tag;
	__be32 *nops;
};

struct cb_getattrargs {
	struct sockaddr *addr;
	struct nfs_fh fh;
	uint32_t bitmap[2];
};

struct cb_getattrres {
	__be32 status;
	uint32_t bitmap[2];
	uint64_t size;
	uint64_t change_attr;
	struct timespec ctime;
	struct timespec mtime;
};

struct cb_recallargs {
	struct sockaddr *addr;
	struct nfs_fh fh;
	nfs4_stateid stateid;
	uint32_t truncate;
};

extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res);
extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy);

#ifdef CONFIG_NFS_V4
extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt);
extern void nfs_callback_down(int minorversion);
#endif /* CONFIG_NFS_V4 */

/*
 * nfs41: Callbacks are expected to not cause substantial latency,
 * so we limit their concurrency to 1 by setting up the maximum number
 * of slots for the backchannel.
 */
#define NFS41_BC_MIN_CALLBACKS 1

extern unsigned int nfs_callback_set_tcpport;
extern unsigned short nfs_callback_tcpport;
extern unsigned short nfs_callback_tcpport6;

#endif /* __LINUX_FS_NFS_CALLBACK_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/fs/nfs/callback.h
	3	*
	4	* Copyright (C) 2004 Trond Myklebust
	5	*
	6	* NFSv4 callback definitions
	7	*/
	8	#ifndef __LINUX_FS_NFS_CALLBACK_H
	9	#define __LINUX_FS_NFS_CALLBACK_H
	10
	11	#define NFS4_CALLBACK 0x40000000
	12	#define NFS4_CALLBACK_XDRSIZE 2048
	13	#define NFS4_CALLBACK_BUFSIZE (1024 + NFS4_CALLBACK_XDRSIZE)
	14
	15	enum nfs4_callback_procnum {
	16	CB_NULL = 0,
	17	CB_COMPOUND = 1,
	18	};
	19
	20	enum nfs4_callback_opnum {
	21	OP_CB_GETATTR = 3,
	22	OP_CB_RECALL = 4,
45377b94 BH	23	/* Callback operations new to NFSv4.1 */
	24	OP_CB_LAYOUTRECALL = 5,
	25	OP_CB_NOTIFY = 6,
	26	OP_CB_PUSH_DELEG = 7,
	27	OP_CB_RECALL_ANY = 8,
	28	OP_CB_RECALLABLE_OBJ_AVAIL = 9,
	29	OP_CB_RECALL_SLOT = 10,
	30	OP_CB_SEQUENCE = 11,
	31	OP_CB_WANTS_CANCELLED = 12,
	32	OP_CB_NOTIFY_LOCK = 13,
1da177e4 LT	33	OP_CB_ILLEGAL = 10044,
	34	};
	35
	36	struct cb_compound_hdr_arg {
2e42c3e2	37	unsigned int taglen;
1da177e4	38	const char *tag;
b8f2ef84	39	unsigned int minorversion;
1da177e4 LT	40	unsigned nops;
	41	};
	42
	43	struct cb_compound_hdr_res {
5704fdeb	44	__be32 *status;
2e42c3e2	45	unsigned int taglen;
1da177e4	46	const char *tag;
5704fdeb	47	__be32 *nops;
1da177e4 LT	48	};
	49
	50	struct cb_getattrargs {
671beed7	51	struct sockaddr *addr;
1da177e4 LT	52	struct nfs_fh fh;
	53	uint32_t bitmap[2];
	54	};
	55
	56	struct cb_getattrres {
e6f684f6	57	__be32 status;
1da177e4 LT	58	uint32_t bitmap[2];
	59	uint64_t size;
	60	uint64_t change_attr;
	61	struct timespec ctime;
	62	struct timespec mtime;
	63	};
	64
	65	struct cb_recallargs {
c1d35866	66	struct sockaddr *addr;
1da177e4 LT	67	struct nfs_fh fh;
	68	nfs4_stateid stateid;
	69	uint32_t truncate;
	70	};
	71
e6f684f6 AV	72	extern __be32 nfs4_callback_getattr(struct cb_getattrargs args, struct cb_getattrres res);
e6f684f6 AV	73	extern __be32 nfs4_callback_recall(struct cb_recallargs args, void dummy);
1da177e4	74
5ae1fbce	75	#ifdef CONFIG_NFS_V4
71468513	76	extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt);
e82dc22d AA	77	extern void nfs_callback_down(int minorversion);
e82dc22d AA	78	#endif /* CONFIG_NFS_V4 */
1da177e4	79
a43cde94 RL	80	/*
	81	* nfs41: Callbacks are expected to not cause substantial latency,
	82	* so we limit their concurrency to 1 by setting up the maximum number
	83	* of slots for the backchannel.
	84	*/
	85	#define NFS41_BC_MIN_CALLBACKS 1
	86
a72b4422	87	extern unsigned int nfs_callback_set_tcpport;
1da177e4	88	extern unsigned short nfs_callback_tcpport;
f738f517	89	extern unsigned short nfs_callback_tcpport6;
1da177e4 LT	90
1da177e4 LT	91	#endif /* __LINUX_FS_NFS_CALLBACK_H */