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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 */ |
36 | OP_CB_OFFLOAD = 15, | |
1da177e4 LT |
37 | OP_CB_ILLEGAL = 10044, |
38 | }; | |
39 | ||
810d82e6 | 40 | struct nfs4_slot; |
c36fca52 AA |
41 | struct cb_process_state { |
42 | __be32 drc_status; | |
43 | struct nfs_client *clp; | |
810d82e6 | 44 | struct nfs4_slot *slot; |
459de2ed | 45 | u32 minorversion; |
c7add9a9 | 46 | struct net *net; |
c36fca52 AA |
47 | }; |
48 | ||
1da177e4 | 49 | struct cb_compound_hdr_arg { |
2e42c3e2 | 50 | unsigned int taglen; |
1da177e4 | 51 | const char *tag; |
b8f2ef84 | 52 | unsigned int minorversion; |
c36fca52 | 53 | unsigned int cb_ident; /* v4.0 callback identifier */ |
1da177e4 LT |
54 | unsigned nops; |
55 | }; | |
56 | ||
57 | struct cb_compound_hdr_res { | |
5704fdeb | 58 | __be32 *status; |
2e42c3e2 | 59 | unsigned int taglen; |
1da177e4 | 60 | const char *tag; |
5704fdeb | 61 | __be32 *nops; |
1da177e4 LT |
62 | }; |
63 | ||
64 | struct cb_getattrargs { | |
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 { | |
1da177e4 LT |
79 | struct nfs_fh fh; |
80 | nfs4_stateid stateid; | |
81 | uint32_t truncate; | |
82 | }; | |
83 | ||
2d9b9ec3 BH |
84 | #if defined(CONFIG_NFS_V4_1) |
85 | ||
86 | struct referring_call { | |
87 | uint32_t rc_sequenceid; | |
88 | uint32_t rc_slotid; | |
89 | }; | |
90 | ||
91 | struct referring_call_list { | |
92 | struct nfs4_sessionid rcl_sessionid; | |
93 | uint32_t rcl_nrefcalls; | |
94 | struct referring_call *rcl_refcalls; | |
95 | }; | |
96 | ||
97 | struct cb_sequenceargs { | |
65fc64e5 | 98 | struct sockaddr *csa_addr; |
2d9b9ec3 BH |
99 | struct nfs4_sessionid csa_sessionid; |
100 | uint32_t csa_sequenceid; | |
101 | uint32_t csa_slotid; | |
102 | uint32_t csa_highestslotid; | |
103 | uint32_t csa_cachethis; | |
104 | uint32_t csa_nrclists; | |
105 | struct referring_call_list *csa_rclists; | |
106 | }; | |
107 | ||
108 | struct cb_sequenceres { | |
65fc64e5 | 109 | __be32 csr_status; |
2d9b9ec3 BH |
110 | struct nfs4_sessionid csr_sessionid; |
111 | uint32_t csr_sequenceid; | |
112 | uint32_t csr_slotid; | |
113 | uint32_t csr_highestslotid; | |
114 | uint32_t csr_target_highestslotid; | |
115 | }; | |
116 | ||
c36fca52 AA |
117 | extern __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, |
118 | struct cb_sequenceres *res, | |
119 | struct cb_process_state *cps); | |
d49433e1 | 120 | |
31f09607 AB |
121 | #define RCA4_TYPE_MASK_RDATA_DLG 0 |
122 | #define RCA4_TYPE_MASK_WDATA_DLG 1 | |
36840370 AB |
123 | #define RCA4_TYPE_MASK_DIR_DLG 2 |
124 | #define RCA4_TYPE_MASK_FILE_LAYOUT 3 | |
125 | #define RCA4_TYPE_MASK_BLK_LAYOUT 4 | |
126 | #define RCA4_TYPE_MASK_OBJ_LAYOUT_MIN 8 | |
127 | #define RCA4_TYPE_MASK_OBJ_LAYOUT_MAX 9 | |
128 | #define RCA4_TYPE_MASK_OTHER_LAYOUT_MIN 12 | |
129 | #define RCA4_TYPE_MASK_OTHER_LAYOUT_MAX 15 | |
130 | #define RCA4_TYPE_MASK_ALL 0xf31f | |
31f09607 AB |
131 | |
132 | struct cb_recallanyargs { | |
31f09607 AB |
133 | uint32_t craa_objs_to_keep; |
134 | uint32_t craa_type_mask; | |
135 | }; | |
136 | ||
c36fca52 AA |
137 | extern __be32 nfs4_callback_recallany(struct cb_recallanyargs *args, |
138 | void *dummy, | |
139 | struct cb_process_state *cps); | |
b9efa1b2 AA |
140 | |
141 | struct cb_recallslotargs { | |
d5fb4ce3 | 142 | uint32_t crsa_target_highest_slotid; |
b9efa1b2 | 143 | }; |
c36fca52 AA |
144 | extern __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, |
145 | void *dummy, | |
146 | struct cb_process_state *cps); | |
b9efa1b2 | 147 | |
f2a62561 | 148 | struct cb_layoutrecallargs { |
f2a62561 FI |
149 | uint32_t cbl_recall_type; |
150 | uint32_t cbl_layout_type; | |
151 | uint32_t cbl_layoutchanged; | |
152 | union { | |
153 | struct { | |
154 | struct nfs_fh cbl_fh; | |
155 | struct pnfs_layout_range cbl_range; | |
156 | nfs4_stateid cbl_stateid; | |
157 | }; | |
158 | struct nfs_fsid cbl_fsid; | |
159 | }; | |
160 | }; | |
161 | ||
0e0243dc | 162 | extern __be32 nfs4_callback_layoutrecall( |
f2a62561 FI |
163 | struct cb_layoutrecallargs *args, |
164 | void *dummy, struct cb_process_state *cps); | |
165 | ||
1be5683b ME |
166 | struct cb_devicenotifyitem { |
167 | uint32_t cbd_notify_type; | |
168 | uint32_t cbd_layout_type; | |
169 | struct nfs4_deviceid cbd_dev_id; | |
170 | uint32_t cbd_immediate; | |
171 | }; | |
172 | ||
173 | struct cb_devicenotifyargs { | |
174 | int ndevs; | |
175 | struct cb_devicenotifyitem *devs; | |
176 | }; | |
177 | ||
178 | extern __be32 nfs4_callback_devicenotify( | |
179 | struct cb_devicenotifyargs *args, | |
180 | void *dummy, struct cb_process_state *cps); | |
181 | ||
2d9b9ec3 | 182 | #endif /* CONFIG_NFS_V4_1 */ |
778be232 | 183 | extern int check_gss_callback_principal(struct nfs_client *, struct svc_rqst *); |
c36fca52 AA |
184 | extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args, |
185 | struct cb_getattrres *res, | |
186 | struct cb_process_state *cps); | |
187 | extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy, | |
188 | struct cb_process_state *cps); | |
89d77c8f | 189 | #if IS_ENABLED(CONFIG_NFS_V4) |
71468513 | 190 | extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt); |
c8ceb412 | 191 | extern void nfs_callback_down(int minorversion, struct net *net); |
e82dc22d | 192 | #endif /* CONFIG_NFS_V4 */ |
a43cde94 RL |
193 | /* |
194 | * nfs41: Callbacks are expected to not cause substantial latency, | |
195 | * so we limit their concurrency to 1 by setting up the maximum number | |
196 | * of slots for the backchannel. | |
197 | */ | |
198 | #define NFS41_BC_MIN_CALLBACKS 1 | |
d49433e1 | 199 | #define NFS41_BC_MAX_CALLBACKS 1 |
a43cde94 | 200 | |
a72b4422 | 201 | extern unsigned int nfs_callback_set_tcpport; |
1da177e4 LT |
202 | |
203 | #endif /* __LINUX_FS_NFS_CALLBACK_H */ |