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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Andy Adamson778be232011-01-25 15:38:01 +000010#include <linux/sunrpc/svc.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011
12#define NFS4_CALLBACK 0x40000000
13#define NFS4_CALLBACK_XDRSIZE 2048
14#define NFS4_CALLBACK_BUFSIZE (1024 + NFS4_CALLBACK_XDRSIZE)
15
16enum nfs4_callback_procnum {
17 CB_NULL = 0,
18 CB_COMPOUND = 1,
19};
20
21enum nfs4_callback_opnum {
22 OP_CB_GETATTR = 3,
23 OP_CB_RECALL = 4,
Benny Halevy45377b92009-04-01 09:23:21 -040024/* 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,
Benny Halevy34bc47c92009-04-01 09:23:22 -040034 OP_CB_NOTIFY_DEVICEID = 14,
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 OP_CB_ILLEGAL = 10044,
36};
37
Andy Adamsonc36fca52011-01-06 02:04:32 +000038struct cb_process_state {
39 __be32 drc_status;
40 struct nfs_client *clp;
Andy Adamsonc36fca52011-01-06 02:04:32 +000041};
42
Linus Torvalds1da177e2005-04-16 15:20:36 -070043struct cb_compound_hdr_arg {
Trond Myklebust2e42c3e2007-05-14 17:20:41 -040044 unsigned int taglen;
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 const char *tag;
Benny Halevyb8f2ef82009-04-01 09:23:19 -040046 unsigned int minorversion;
Andy Adamsonc36fca52011-01-06 02:04:32 +000047 unsigned int cb_ident; /* v4.0 callback identifier */
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 unsigned nops;
49};
50
51struct cb_compound_hdr_res {
Al Viro5704fde2006-10-19 23:28:51 -070052 __be32 *status;
Trond Myklebust2e42c3e2007-05-14 17:20:41 -040053 unsigned int taglen;
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 const char *tag;
Al Viro5704fde2006-10-19 23:28:51 -070055 __be32 *nops;
Linus Torvalds1da177e2005-04-16 15:20:36 -070056};
57
58struct cb_getattrargs {
Chuck Lever671beed2007-12-10 14:58:22 -050059 struct sockaddr *addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 struct nfs_fh fh;
61 uint32_t bitmap[2];
62};
63
64struct cb_getattrres {
Al Viroe6f684f2006-10-19 23:28:50 -070065 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 uint32_t bitmap[2];
67 uint64_t size;
68 uint64_t change_attr;
69 struct timespec ctime;
70 struct timespec mtime;
71};
72
73struct cb_recallargs {
Chuck Leverc1d35862007-12-10 14:58:29 -050074 struct sockaddr *addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 struct nfs_fh fh;
76 nfs4_stateid stateid;
77 uint32_t truncate;
78};
79
Benny Halevy2d9b9ec2009-04-01 09:23:24 -040080#if defined(CONFIG_NFS_V4_1)
81
82struct referring_call {
83 uint32_t rc_sequenceid;
84 uint32_t rc_slotid;
85};
86
87struct referring_call_list {
88 struct nfs4_sessionid rcl_sessionid;
89 uint32_t rcl_nrefcalls;
90 struct referring_call *rcl_refcalls;
91};
92
93struct cb_sequenceargs {
Ricardo Labiaga65fc64e2009-04-01 09:23:30 -040094 struct sockaddr *csa_addr;
Benny Halevy2d9b9ec2009-04-01 09:23:24 -040095 struct nfs4_sessionid csa_sessionid;
96 uint32_t csa_sequenceid;
97 uint32_t csa_slotid;
98 uint32_t csa_highestslotid;
99 uint32_t csa_cachethis;
100 uint32_t csa_nrclists;
101 struct referring_call_list *csa_rclists;
102};
103
104struct cb_sequenceres {
Ricardo Labiaga65fc64e2009-04-01 09:23:30 -0400105 __be32 csr_status;
Benny Halevy2d9b9ec2009-04-01 09:23:24 -0400106 struct nfs4_sessionid csr_sessionid;
107 uint32_t csr_sequenceid;
108 uint32_t csr_slotid;
109 uint32_t csr_highestslotid;
110 uint32_t csr_target_highestslotid;
111};
112
Andy Adamsonc36fca52011-01-06 02:04:32 +0000113extern __be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
114 struct cb_sequenceres *res,
115 struct cb_process_state *cps);
Benny Halevyd49433e2009-04-01 09:23:25 -0400116
Alexandros Batsakis25976412009-12-05 13:48:55 -0500117extern int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation,
118 const nfs4_stateid *stateid);
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500119
120#define RCA4_TYPE_MASK_RDATA_DLG 0
121#define RCA4_TYPE_MASK_WDATA_DLG 1
Alexandros Batsakis36840372011-01-06 11:36:31 +0000122#define RCA4_TYPE_MASK_DIR_DLG 2
123#define RCA4_TYPE_MASK_FILE_LAYOUT 3
124#define RCA4_TYPE_MASK_BLK_LAYOUT 4
125#define RCA4_TYPE_MASK_OBJ_LAYOUT_MIN 8
126#define RCA4_TYPE_MASK_OBJ_LAYOUT_MAX 9
127#define RCA4_TYPE_MASK_OTHER_LAYOUT_MIN 12
128#define RCA4_TYPE_MASK_OTHER_LAYOUT_MAX 15
129#define RCA4_TYPE_MASK_ALL 0xf31f
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500130
131struct cb_recallanyargs {
132 struct sockaddr *craa_addr;
133 uint32_t craa_objs_to_keep;
134 uint32_t craa_type_mask;
135};
136
Andy Adamsonc36fca52011-01-06 02:04:32 +0000137extern __be32 nfs4_callback_recallany(struct cb_recallanyargs *args,
138 void *dummy,
139 struct cb_process_state *cps);
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500140
141struct cb_recallslotargs {
142 struct sockaddr *crsa_addr;
143 uint32_t crsa_target_max_slots;
144};
Andy Adamsonc36fca52011-01-06 02:04:32 +0000145extern __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args,
146 void *dummy,
147 struct cb_process_state *cps);
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500148
Fred Isamanf2a62562011-01-06 11:36:29 +0000149struct cb_layoutrecallargs {
150 struct sockaddr *cbl_addr;
151 uint32_t cbl_recall_type;
152 uint32_t cbl_layout_type;
153 uint32_t cbl_layoutchanged;
154 union {
155 struct {
156 struct nfs_fh cbl_fh;
157 struct pnfs_layout_range cbl_range;
158 nfs4_stateid cbl_stateid;
159 };
160 struct nfs_fsid cbl_fsid;
161 };
162};
163
164extern unsigned nfs4_callback_layoutrecall(
165 struct cb_layoutrecallargs *args,
166 void *dummy, struct cb_process_state *cps);
167
Andy Adamson42acd022011-01-06 02:04:34 +0000168extern void nfs4_check_drain_bc_complete(struct nfs4_session *ses);
169extern void nfs4_cb_take_slot(struct nfs_client *clp);
Benny Halevy2d9b9ec2009-04-01 09:23:24 -0400170#endif /* CONFIG_NFS_V4_1 */
Andy Adamson778be232011-01-25 15:38:01 +0000171extern int check_gss_callback_principal(struct nfs_client *, struct svc_rqst *);
Andy Adamsonc36fca52011-01-06 02:04:32 +0000172extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args,
173 struct cb_getattrres *res,
174 struct cb_process_state *cps);
175extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy,
176 struct cb_process_state *cps);
David Howells5ae1fbc2006-08-22 20:06:08 -0400177#ifdef CONFIG_NFS_V4
Benny Halevy71468512009-04-01 09:22:56 -0400178extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt);
Andy Adamsone82dc222009-04-01 09:23:14 -0400179extern void nfs_callback_down(int minorversion);
Alexandros Batsakis25976412009-12-05 13:48:55 -0500180extern int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation,
181 const nfs4_stateid *stateid);
Andy Adamson2c2618c2011-01-06 02:04:31 +0000182extern int nfs4_set_callback_sessionid(struct nfs_client *clp);
Andy Adamsone82dc222009-04-01 09:23:14 -0400183#endif /* CONFIG_NFS_V4 */
Ricardo Labiagaa43cde92009-04-01 09:23:08 -0400184/*
185 * nfs41: Callbacks are expected to not cause substantial latency,
186 * so we limit their concurrency to 1 by setting up the maximum number
187 * of slots for the backchannel.
188 */
189#define NFS41_BC_MIN_CALLBACKS 1
Benny Halevyd49433e2009-04-01 09:23:25 -0400190#define NFS41_BC_MAX_CALLBACKS 1
Ricardo Labiagaa43cde92009-04-01 09:23:08 -0400191
Trond Myklebusta72b4422006-01-03 09:55:41 +0100192extern unsigned int nfs_callback_set_tcpport;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193extern unsigned short nfs_callback_tcpport;
Chuck Leverf738f512009-03-18 20:48:06 -0400194extern unsigned short nfs_callback_tcpport6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
196#endif /* __LINUX_FS_NFS_CALLBACK_H */