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8#ifndef __LINUX_FS_NFS_CALLBACK_H
9#define __LINUX_FS_NFS_CALLBACK_H
10#include <linux/sunrpc/svc.h>
11
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,
24
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,
34 OP_CB_NOTIFY_DEVICEID = 14,
35
36 OP_CB_OFFLOAD = 15,
37 OP_CB_ILLEGAL = 10044,
38};
39
40struct nfs4_slot;
41struct cb_process_state {
42 __be32 drc_status;
43 struct nfs_client *clp;
44 struct nfs4_slot *slot;
45 u32 minorversion;
46 struct net *net;
47};
48
49struct cb_compound_hdr_arg {
50 unsigned int taglen;
51 const char *tag;
52 unsigned int minorversion;
53 unsigned int cb_ident;
54 unsigned nops;
55};
56
57struct cb_compound_hdr_res {
58 __be32 *status;
59 unsigned int taglen;
60 const char *tag;
61 __be32 *nops;
62};
63
64struct cb_getattrargs {
65 struct nfs_fh fh;
66 uint32_t bitmap[2];
67};
68
69struct cb_getattrres {
70 __be32 status;
71 uint32_t bitmap[2];
72 uint64_t size;
73 uint64_t change_attr;
74 struct timespec ctime;
75 struct timespec mtime;
76};
77
78struct cb_recallargs {
79 struct nfs_fh fh;
80 nfs4_stateid stateid;
81 uint32_t truncate;
82};
83
84#if defined(CONFIG_NFS_V4_1)
85
86struct referring_call {
87 uint32_t rc_sequenceid;
88 uint32_t rc_slotid;
89};
90
91struct referring_call_list {
92 struct nfs4_sessionid rcl_sessionid;
93 uint32_t rcl_nrefcalls;
94 struct referring_call *rcl_refcalls;
95};
96
97struct cb_sequenceargs {
98 struct sockaddr *csa_addr;
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
108struct cb_sequenceres {
109 __be32 csr_status;
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
117extern __be32 nfs4_callback_sequence(void *argp, void *resp,
118 struct cb_process_state *cps);
119
120#define RCA4_TYPE_MASK_RDATA_DLG 0
121#define RCA4_TYPE_MASK_WDATA_DLG 1
122#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
130
131struct cb_recallanyargs {
132 uint32_t craa_objs_to_keep;
133 uint32_t craa_type_mask;
134};
135
136extern __be32 nfs4_callback_recallany(void *argp, void *resp,
137 struct cb_process_state *cps);
138
139struct cb_recallslotargs {
140 uint32_t crsa_target_highest_slotid;
141};
142extern __be32 nfs4_callback_recallslot(void *argp, void *resp,
143 struct cb_process_state *cps);
144
145struct cb_layoutrecallargs {
146 uint32_t cbl_recall_type;
147 uint32_t cbl_layout_type;
148 uint32_t cbl_layoutchanged;
149 union {
150 struct {
151 struct nfs_fh cbl_fh;
152 struct pnfs_layout_range cbl_range;
153 nfs4_stateid cbl_stateid;
154 };
155 struct nfs_fsid cbl_fsid;
156 };
157};
158
159extern __be32 nfs4_callback_layoutrecall(void *argp, void *resp,
160 struct cb_process_state *cps);
161
162struct cb_devicenotifyitem {
163 uint32_t cbd_notify_type;
164 uint32_t cbd_layout_type;
165 struct nfs4_deviceid cbd_dev_id;
166 uint32_t cbd_immediate;
167};
168
169struct cb_devicenotifyargs {
170 int ndevs;
171 struct cb_devicenotifyitem *devs;
172};
173
174extern __be32 nfs4_callback_devicenotify(void *argp, void *resp,
175 struct cb_process_state *cps);
176
177struct cb_notify_lock_args {
178 struct nfs_fh cbnl_fh;
179 struct nfs_lowner cbnl_owner;
180 bool cbnl_valid;
181};
182
183extern __be32 nfs4_callback_notify_lock(void *argp, void *resp,
184 struct cb_process_state *cps);
185#endif
186extern int check_gss_callback_principal(struct nfs_client *, struct svc_rqst *);
187extern __be32 nfs4_callback_getattr(void *argp, void *resp,
188 struct cb_process_state *cps);
189extern __be32 nfs4_callback_recall(void *argp, void *resp,
190 struct cb_process_state *cps);
191#if IS_ENABLED(CONFIG_NFS_V4)
192extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt);
193extern void nfs_callback_down(int minorversion, struct net *net);
194#endif
195
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198
199
200#define NFS41_BC_MIN_CALLBACKS 1
201#define NFS41_BC_MAX_CALLBACKS 1
202
203#define NFS4_MIN_NR_CALLBACK_THREADS 1
204
205extern unsigned int nfs_callback_set_tcpport;
206extern unsigned short nfs_callback_nr_threads;
207
208#endif
209
