[mirror_ubuntu-artful-kernel.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
#include <linux/sunrpc/svc.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,
/* Callback operations new to NFSv4.2 */
	OP_CB_OFFLOAD = 15,
	OP_CB_ILLEGAL = 10044,
};

struct cb_process_state {
	__be32			drc_status;
	struct nfs_client	*clp;
	u32			slotid;
	u32			minorversion;
	struct net		*net;
};

struct cb_compound_hdr_arg {
	unsigned int taglen;
	const char *tag;
	unsigned int minorversion;
	unsigned int cb_ident; /* v4.0 callback identifier */
	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 __be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
				       struct cb_sequenceres *res,
				       struct cb_process_state *cps);

extern int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation,
					     const nfs4_stateid *stateid);

#define RCA4_TYPE_MASK_RDATA_DLG	0
#define RCA4_TYPE_MASK_WDATA_DLG	1
#define RCA4_TYPE_MASK_DIR_DLG         2
#define RCA4_TYPE_MASK_FILE_LAYOUT     3
#define RCA4_TYPE_MASK_BLK_LAYOUT      4
#define RCA4_TYPE_MASK_OBJ_LAYOUT_MIN  8
#define RCA4_TYPE_MASK_OBJ_LAYOUT_MAX  9
#define RCA4_TYPE_MASK_OTHER_LAYOUT_MIN 12
#define RCA4_TYPE_MASK_OTHER_LAYOUT_MAX 15
#define RCA4_TYPE_MASK_ALL 0xf31f

struct cb_recallanyargs {
	struct sockaddr	*craa_addr;
	uint32_t	craa_objs_to_keep;
	uint32_t	craa_type_mask;
};

extern __be32 nfs4_callback_recallany(struct cb_recallanyargs *args,
					void *dummy,
					struct cb_process_state *cps);

struct cb_recallslotargs {
	struct sockaddr	*crsa_addr;
	uint32_t	crsa_target_highest_slotid;
};
extern __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args,
					 void *dummy,
					 struct cb_process_state *cps);

struct cb_layoutrecallargs {
	struct sockaddr		*cbl_addr;
	uint32_t		cbl_recall_type;
	uint32_t		cbl_layout_type;
	uint32_t		cbl_layoutchanged;
	union {
		struct {
			struct nfs_fh		cbl_fh;
			struct pnfs_layout_range cbl_range;
			nfs4_stateid		cbl_stateid;
		};
		struct nfs_fsid		cbl_fsid;
	};
};

extern __be32 nfs4_callback_layoutrecall(
	struct cb_layoutrecallargs *args,
	void *dummy, struct cb_process_state *cps);

struct cb_devicenotifyitem {
	uint32_t		cbd_notify_type;
	uint32_t		cbd_layout_type;
	struct nfs4_deviceid	cbd_dev_id;
	uint32_t		cbd_immediate;
};

struct cb_devicenotifyargs {
	int				 ndevs;
	struct cb_devicenotifyitem	 *devs;
};

extern __be32 nfs4_callback_devicenotify(
	struct cb_devicenotifyargs *args,
	void *dummy, struct cb_process_state *cps);

#endif /* CONFIG_NFS_V4_1 */
extern int check_gss_callback_principal(struct nfs_client *, struct svc_rqst *);
extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args,
				    struct cb_getattrres *res,
				    struct cb_process_state *cps);
extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy,
				   struct cb_process_state *cps);
#if IS_ENABLED(CONFIG_NFS_V4)
extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt);
extern void nfs_callback_down(int minorversion, struct net *net);
extern int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation,
					    const nfs4_stateid *stateid);
extern int nfs4_set_callback_sessionid(struct nfs_client *clp);
#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;

#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
778be232	10	#include <linux/sunrpc/svc.h>
1da177e4 LT	11
	12	#define NFS4_CALLBACK 0x40000000
	13	#define NFS4_CALLBACK_XDRSIZE 2048
	14	#define NFS4_CALLBACK_BUFSIZE (1024 + NFS4_CALLBACK_XDRSIZE)
	15
	16	enum nfs4_callback_procnum {
	17	CB_NULL = 0,
	18	CB_COMPOUND = 1,
	19	};
	20
	21	enum nfs4_callback_opnum {
	22	OP_CB_GETATTR = 3,
	23	OP_CB_RECALL = 4,
45377b94 BH	24	/* Callback operations new to NFSv4.1 */
	25	OP_CB_LAYOUTRECALL = 5,
	26	OP_CB_NOTIFY = 6,
	27	OP_CB_PUSH_DELEG = 7,
	28	OP_CB_RECALL_ANY = 8,
	29	OP_CB_RECALLABLE_OBJ_AVAIL = 9,
	30	OP_CB_RECALL_SLOT = 10,
	31	OP_CB_SEQUENCE = 11,
	32	OP_CB_WANTS_CANCELLED = 12,
	33	OP_CB_NOTIFY_LOCK = 13,
34bc47c9	34	OP_CB_NOTIFY_DEVICEID = 14,
6b140b85 BS	35	/* Callback operations new to NFSv4.2 */
6b140b85 BS	36	OP_CB_OFFLOAD = 15,
1da177e4 LT	37	OP_CB_ILLEGAL = 10044,
	38	};
	39
c36fca52 AA	40	struct cb_process_state {
	41	__be32 drc_status;
	42	struct nfs_client *clp;
45d43c29	43	u32 slotid;
459de2ed	44	u32 minorversion;
c7add9a9	45	struct net *net;
c36fca52 AA	46	};
c36fca52 AA	47
1da177e4	48	struct cb_compound_hdr_arg {
2e42c3e2	49	unsigned int taglen;
1da177e4	50	const char *tag;
b8f2ef84	51	unsigned int minorversion;
c36fca52	52	unsigned int cb_ident; /* v4.0 callback identifier */
1da177e4 LT	53	unsigned nops;
	54	};
	55
	56	struct cb_compound_hdr_res {
5704fdeb	57	__be32 *status;
2e42c3e2	58	unsigned int taglen;
1da177e4	59	const char *tag;
5704fdeb	60	__be32 *nops;
1da177e4 LT	61	};
	62
	63	struct cb_getattrargs {
671beed7	64	struct sockaddr *addr;
1da177e4 LT	65	struct nfs_fh fh;
	66	uint32_t bitmap[2];
	67	};
	68
	69	struct cb_getattrres {
e6f684f6	70	__be32 status;
1da177e4 LT	71	uint32_t bitmap[2];
	72	uint64_t size;
	73	uint64_t change_attr;
	74	struct timespec ctime;
	75	struct timespec mtime;
	76	};
	77
	78	struct cb_recallargs {
c1d35866	79	struct sockaddr *addr;
1da177e4 LT	80	struct nfs_fh fh;
	81	nfs4_stateid stateid;
	82	uint32_t truncate;
	83	};
	84
2d9b9ec3 BH	85	#if defined(CONFIG_NFS_V4_1)
	86
	87	struct referring_call {
	88	uint32_t rc_sequenceid;
	89	uint32_t rc_slotid;
	90	};
	91
	92	struct referring_call_list {
	93	struct nfs4_sessionid rcl_sessionid;
	94	uint32_t rcl_nrefcalls;
	95	struct referring_call *rcl_refcalls;
	96	};
	97
	98	struct cb_sequenceargs {
65fc64e5	99	struct sockaddr *csa_addr;
2d9b9ec3 BH	100	struct nfs4_sessionid csa_sessionid;
	101	uint32_t csa_sequenceid;
	102	uint32_t csa_slotid;
	103	uint32_t csa_highestslotid;
	104	uint32_t csa_cachethis;
	105	uint32_t csa_nrclists;
	106	struct referring_call_list *csa_rclists;
	107	};
	108
	109	struct cb_sequenceres {
65fc64e5	110	__be32 csr_status;
2d9b9ec3 BH	111	struct nfs4_sessionid csr_sessionid;
	112	uint32_t csr_sequenceid;
	113	uint32_t csr_slotid;
	114	uint32_t csr_highestslotid;
	115	uint32_t csr_target_highestslotid;
	116	};
	117
c36fca52 AA	118	extern __be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
	119	struct cb_sequenceres *res,
	120	struct cb_process_state *cps);
d49433e1	121
2597641d AB	122	extern int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation,
2597641d AB	123	const nfs4_stateid *stateid);
31f09607 AB	124
	125	#define RCA4_TYPE_MASK_RDATA_DLG 0
	126	#define RCA4_TYPE_MASK_WDATA_DLG 1
36840370 AB	127	#define RCA4_TYPE_MASK_DIR_DLG 2
	128	#define RCA4_TYPE_MASK_FILE_LAYOUT 3
	129	#define RCA4_TYPE_MASK_BLK_LAYOUT 4
	130	#define RCA4_TYPE_MASK_OBJ_LAYOUT_MIN 8
	131	#define RCA4_TYPE_MASK_OBJ_LAYOUT_MAX 9
	132	#define RCA4_TYPE_MASK_OTHER_LAYOUT_MIN 12
	133	#define RCA4_TYPE_MASK_OTHER_LAYOUT_MAX 15
	134	#define RCA4_TYPE_MASK_ALL 0xf31f
31f09607 AB	135
	136	struct cb_recallanyargs {
	137	struct sockaddr *craa_addr;
	138	uint32_t craa_objs_to_keep;
	139	uint32_t craa_type_mask;
	140	};
	141
c36fca52 AA	142	extern __be32 nfs4_callback_recallany(struct cb_recallanyargs *args,
	143	void *dummy,
	144	struct cb_process_state *cps);
b9efa1b2 AA	145
	146	struct cb_recallslotargs {
	147	struct sockaddr *crsa_addr;
d5fb4ce3	148	uint32_t crsa_target_highest_slotid;
b9efa1b2	149	};
c36fca52 AA	150	extern __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args,
	151	void *dummy,
	152	struct cb_process_state *cps);
b9efa1b2	153
f2a62561 FI	154	struct cb_layoutrecallargs {
	155	struct sockaddr *cbl_addr;
	156	uint32_t cbl_recall_type;
	157	uint32_t cbl_layout_type;
	158	uint32_t cbl_layoutchanged;
	159	union {
	160	struct {
	161	struct nfs_fh cbl_fh;
	162	struct pnfs_layout_range cbl_range;
	163	nfs4_stateid cbl_stateid;
	164	};
	165	struct nfs_fsid cbl_fsid;
	166	};
	167	};
	168
0e0243dc	169	extern __be32 nfs4_callback_layoutrecall(
f2a62561 FI	170	struct cb_layoutrecallargs *args,
	171	void dummy, struct cb_process_state cps);
	172
1be5683b ME	173	struct cb_devicenotifyitem {
	174	uint32_t cbd_notify_type;
	175	uint32_t cbd_layout_type;
	176	struct nfs4_deviceid cbd_dev_id;
	177	uint32_t cbd_immediate;
	178	};
	179
	180	struct cb_devicenotifyargs {
	181	int ndevs;
	182	struct cb_devicenotifyitem *devs;
	183	};
	184
	185	extern __be32 nfs4_callback_devicenotify(
	186	struct cb_devicenotifyargs *args,
	187	void dummy, struct cb_process_state cps);
	188
2d9b9ec3	189	#endif /* CONFIG_NFS_V4_1 */
778be232	190	extern int check_gss_callback_principal(struct nfs_client , struct svc_rqst );
c36fca52 AA	191	extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args,
	192	struct cb_getattrres *res,
	193	struct cb_process_state *cps);
	194	extern __be32 nfs4_callback_recall(struct cb_recallargs args, void dummy,
	195	struct cb_process_state *cps);
89d77c8f	196	#if IS_ENABLED(CONFIG_NFS_V4)
71468513	197	extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt);
c8ceb412	198	extern void nfs_callback_down(int minorversion, struct net *net);
2597641d AB	199	extern int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation,
2597641d AB	200	const nfs4_stateid *stateid);
2c2618c6	201	extern int nfs4_set_callback_sessionid(struct nfs_client *clp);
e82dc22d	202	#endif /* CONFIG_NFS_V4 */
a43cde94 RL	203	/*
	204	* nfs41: Callbacks are expected to not cause substantial latency,
	205	* so we limit their concurrency to 1 by setting up the maximum number
	206	* of slots for the backchannel.
	207	*/
	208	#define NFS41_BC_MIN_CALLBACKS 1
d49433e1	209	#define NFS41_BC_MAX_CALLBACKS 1
a43cde94	210
a72b4422	211	extern unsigned int nfs_callback_set_tcpport;
0b37d20c	212	extern unsigned short nfs_callback_tcpport;
1da177e4 LT	213
1da177e4 LT	214	#endif /* __LINUX_FS_NFS_CALLBACK_H */