[linux-block.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_NOTIFY_DEVICEID = 14,
	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;
};

#if defined(CONFIG_NFS_V4_1)

struct referring_call {
	uint32_t			rc_sequenceid;
	uint32_t			rc_slotid;
};

struct referring_call_list {
	struct nfs4_sessionid		rcl_sessionid;
	uint32_t			rcl_nrefcalls;
	struct referring_call 		*rcl_refcalls;
};

struct cb_sequenceargs {
	struct sockaddr			*csa_addr;
	struct nfs4_sessionid		csa_sessionid;
	uint32_t			csa_sequenceid;
	uint32_t			csa_slotid;
	uint32_t			csa_highestslotid;
	uint32_t			csa_cachethis;
	uint32_t			csa_nrclists;
	struct referring_call_list	*csa_rclists;
};

struct cb_sequenceres {
	__be32				csr_status;
	struct nfs4_sessionid		csr_sessionid;
	uint32_t			csr_sequenceid;
	uint32_t			csr_slotid;
	uint32_t			csr_highestslotid;
	uint32_t			csr_target_highestslotid;
};

extern unsigned nfs4_callback_sequence(struct cb_sequenceargs *args,
				       struct cb_sequenceres *res);

#endif /* CONFIG_NFS_V4_1 */

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
#define NFS41_BC_MAX_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,
34bc47c9	33	OP_CB_NOTIFY_DEVICEID = 14,
1da177e4 LT	34	OP_CB_ILLEGAL = 10044,
	35	};
	36
	37	struct cb_compound_hdr_arg {
2e42c3e2	38	unsigned int taglen;
1da177e4	39	const char *tag;
b8f2ef84	40	unsigned int minorversion;
1da177e4 LT	41	unsigned nops;
	42	};
	43
	44	struct cb_compound_hdr_res {
5704fdeb	45	__be32 *status;
2e42c3e2	46	unsigned int taglen;
1da177e4	47	const char *tag;
5704fdeb	48	__be32 *nops;
1da177e4 LT	49	};
	50
	51	struct cb_getattrargs {
671beed7	52	struct sockaddr *addr;
1da177e4 LT	53	struct nfs_fh fh;
	54	uint32_t bitmap[2];
	55	};
	56
	57	struct cb_getattrres {
e6f684f6	58	__be32 status;
1da177e4 LT	59	uint32_t bitmap[2];
	60	uint64_t size;
	61	uint64_t change_attr;
	62	struct timespec ctime;
	63	struct timespec mtime;
	64	};
	65
	66	struct cb_recallargs {
c1d35866	67	struct sockaddr *addr;
1da177e4 LT	68	struct nfs_fh fh;
	69	nfs4_stateid stateid;
	70	uint32_t truncate;
	71	};
	72
2d9b9ec3 BH	73	#if defined(CONFIG_NFS_V4_1)
	74
	75	struct referring_call {
	76	uint32_t rc_sequenceid;
	77	uint32_t rc_slotid;
	78	};
	79
	80	struct referring_call_list {
	81	struct nfs4_sessionid rcl_sessionid;
	82	uint32_t rcl_nrefcalls;
	83	struct referring_call *rcl_refcalls;
	84	};
	85
	86	struct cb_sequenceargs {
65fc64e5	87	struct sockaddr *csa_addr;
2d9b9ec3 BH	88	struct nfs4_sessionid csa_sessionid;
	89	uint32_t csa_sequenceid;
	90	uint32_t csa_slotid;
	91	uint32_t csa_highestslotid;
	92	uint32_t csa_cachethis;
	93	uint32_t csa_nrclists;
	94	struct referring_call_list *csa_rclists;
	95	};
	96
	97	struct cb_sequenceres {
65fc64e5	98	__be32 csr_status;
2d9b9ec3 BH	99	struct nfs4_sessionid csr_sessionid;
	100	uint32_t csr_sequenceid;
	101	uint32_t csr_slotid;
	102	uint32_t csr_highestslotid;
	103	uint32_t csr_target_highestslotid;
	104	};
	105
d49433e1 BH	106	extern unsigned nfs4_callback_sequence(struct cb_sequenceargs *args,
	107	struct cb_sequenceres *res);
	108
2d9b9ec3 BH	109	#endif /* CONFIG_NFS_V4_1 */
2d9b9ec3 BH	110
e6f684f6 AV	111	extern __be32 nfs4_callback_getattr(struct cb_getattrargs args, struct cb_getattrres res);
e6f684f6 AV	112	extern __be32 nfs4_callback_recall(struct cb_recallargs args, void dummy);
1da177e4	113
5ae1fbce	114	#ifdef CONFIG_NFS_V4
71468513	115	extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt);
e82dc22d AA	116	extern void nfs_callback_down(int minorversion);
e82dc22d AA	117	#endif /* CONFIG_NFS_V4 */
1da177e4	118
a43cde94 RL	119	/*
	120	* nfs41: Callbacks are expected to not cause substantial latency,
	121	* so we limit their concurrency to 1 by setting up the maximum number
	122	* of slots for the backchannel.
	123	*/
	124	#define NFS41_BC_MIN_CALLBACKS 1
d49433e1	125	#define NFS41_BC_MAX_CALLBACKS 1
a43cde94	126
a72b4422	127	extern unsigned int nfs_callback_set_tcpport;
1da177e4	128	extern unsigned short nfs_callback_tcpport;
f738f517	129	extern unsigned short nfs_callback_tcpport6;
1da177e4 LT	130
1da177e4 LT	131	#endif /* __LINUX_FS_NFS_CALLBACK_H */