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9 #ifndef __LINUX_FS_NFS_CALLBACK_H
10 #define __LINUX_FS_NFS_CALLBACK_H
11 #include <linux/sunrpc/svc.h>
12
13 #define NFS4_CALLBACK 0x40000000
14 #define NFS4_CALLBACK_XDRSIZE 2048
15 #define NFS4_CALLBACK_BUFSIZE (1024 + NFS4_CALLBACK_XDRSIZE)
16
17 enum nfs4_callback_procnum {
18 CB_NULL = 0,
19 CB_COMPOUND = 1,
20 };
21
22 enum nfs4_callback_opnum {
23 OP_CB_GETATTR = 3,
24 OP_CB_RECALL = 4,
25
26 OP_CB_LAYOUTRECALL = 5,
27 OP_CB_NOTIFY = 6,
28 OP_CB_PUSH_DELEG = 7,
29 OP_CB_RECALL_ANY = 8,
30 OP_CB_RECALLABLE_OBJ_AVAIL = 9,
31 OP_CB_RECALL_SLOT = 10,
32 OP_CB_SEQUENCE = 11,
33 OP_CB_WANTS_CANCELLED = 12,
34 OP_CB_NOTIFY_LOCK = 13,
35 OP_CB_NOTIFY_DEVICEID = 14,
36
37 OP_CB_OFFLOAD = 15,
38 OP_CB_ILLEGAL = 10044,
39 };
40
41 struct nfs4_slot;
42 struct cb_process_state {
43 __be32 drc_status;
44 struct nfs_client *clp;
45 struct nfs4_slot *slot;
46 u32 minorversion;
47 struct net *net;
48 };
49
50 struct cb_compound_hdr_arg {
51 unsigned int taglen;
52 const char *tag;
53 unsigned int minorversion;
54 unsigned int cb_ident;
55 unsigned nops;
56 };
57
58 struct cb_compound_hdr_res {
59 __be32 *status;
60 unsigned int taglen;
61 const char *tag;
62 __be32 *nops;
63 };
64
65 struct cb_getattrargs {
66 struct nfs_fh fh;
67 uint32_t bitmap[2];
68 };
69
70 struct cb_getattrres {
71 __be32 status;
72 uint32_t bitmap[2];
73 uint64_t size;
74 uint64_t change_attr;
75 struct timespec ctime;
76 struct timespec mtime;
77 };
78
79 struct cb_recallargs {
80 struct nfs_fh fh;
81 nfs4_stateid stateid;
82 uint32_t truncate;
83 };
84
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 {
99 struct sockaddr *csa_addr;
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 {
110 __be32 csr_status;
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
118 extern __be32 nfs4_callback_sequence(void *argp, void *resp,
119 struct cb_process_state *cps);
120
121 #define RCA4_TYPE_MASK_RDATA_DLG 0
122 #define RCA4_TYPE_MASK_WDATA_DLG 1
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
131
132 struct cb_recallanyargs {
133 uint32_t craa_objs_to_keep;
134 uint32_t craa_type_mask;
135 };
136
137 extern __be32 nfs4_callback_recallany(void *argp, void *resp,
138 struct cb_process_state *cps);
139
140 struct cb_recallslotargs {
141 uint32_t crsa_target_highest_slotid;
142 };
143 extern __be32 nfs4_callback_recallslot(void *argp, void *resp,
144 struct cb_process_state *cps);
145
146 struct cb_layoutrecallargs {
147 uint32_t cbl_recall_type;
148 uint32_t cbl_layout_type;
149 uint32_t cbl_layoutchanged;
150 union {
151 struct {
152 struct nfs_fh cbl_fh;
153 struct pnfs_layout_range cbl_range;
154 nfs4_stateid cbl_stateid;
155 };
156 struct nfs_fsid cbl_fsid;
157 };
158 };
159
160 extern __be32 nfs4_callback_layoutrecall(void *argp, void *resp,
161 struct cb_process_state *cps);
162
163 struct cb_devicenotifyitem {
164 uint32_t cbd_notify_type;
165 uint32_t cbd_layout_type;
166 struct nfs4_deviceid cbd_dev_id;
167 uint32_t cbd_immediate;
168 };
169
170 struct cb_devicenotifyargs {
171 int ndevs;
172 struct cb_devicenotifyitem *devs;
173 };
174
175 extern __be32 nfs4_callback_devicenotify(void *argp, void *resp,
176 struct cb_process_state *cps);
177
178 struct cb_notify_lock_args {
179 struct nfs_fh cbnl_fh;
180 struct nfs_lowner cbnl_owner;
181 bool cbnl_valid;
182 };
183
184 extern __be32 nfs4_callback_notify_lock(void *argp, void *resp,
185 struct cb_process_state *cps);
186 #endif
187 #ifdef CONFIG_NFS_V4_2
188 struct cb_offloadargs {
189 struct nfs_fh coa_fh;
190 nfs4_stateid coa_stateid;
191 uint32_t error;
192 uint64_t wr_count;
193 struct nfs_writeverf wr_writeverf;
194 };
195
196 extern __be32 nfs4_callback_offload(void *args, void *dummy,
197 struct cb_process_state *cps);
198 #endif
199 extern int check_gss_callback_principal(struct nfs_client *, struct svc_rqst *);
200 extern __be32 nfs4_callback_getattr(void *argp, void *resp,
201 struct cb_process_state *cps);
202 extern __be32 nfs4_callback_recall(void *argp, void *resp,
203 struct cb_process_state *cps);
204 #if IS_ENABLED(CONFIG_NFS_V4)
205 extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt);
206 extern void nfs_callback_down(int minorversion, struct net *net);
207 #endif
208
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212
213 #define NFS41_BC_MIN_CALLBACKS 1
214 #define NFS41_BC_MAX_CALLBACKS 1
215
216 #define NFS4_MIN_NR_CALLBACK_THREADS 1
217
218 extern unsigned int nfs_callback_set_tcpport;
219 extern unsigned short nfs_callback_nr_threads;
220
221 #endif