blob: 14e0f9371d1463900258ef60c361c3079f55c707 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/fs/nfs/callback_xdr.c
3 *
4 * Copyright (C) 2004 Trond Myklebust
5 *
6 * NFSv4 callback encode/decode procedures
7 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07008#include <linux/kernel.h>
9#include <linux/sunrpc/svc.h>
10#include <linux/nfs4.h>
11#include <linux/nfs_fs.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090012#include <linux/slab.h>
Andy Adamsonc36fca52011-01-06 02:04:32 +000013#include <linux/sunrpc/bc_xprt.h>
Trond Myklebust4ce79712005-06-22 17:16:21 +000014#include "nfs4_fs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include "callback.h"
Andy Adamsonc36fca52011-01-06 02:04:32 +000016#include "internal.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070017
18#define CB_OP_TAGLEN_MAXSZ (512)
19#define CB_OP_HDR_RES_MAXSZ (2 + CB_OP_TAGLEN_MAXSZ)
20#define CB_OP_GETATTR_BITMAP_MAXSZ (4)
21#define CB_OP_GETATTR_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \
22 CB_OP_GETATTR_BITMAP_MAXSZ + \
23 2 + 2 + 3 + 3)
24#define CB_OP_RECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
25
Benny Halevy4aece6a2009-04-01 09:23:26 -040026#if defined(CONFIG_NFS_V4_1)
Fred Isamanf2a62562011-01-06 11:36:29 +000027#define CB_OP_LAYOUTRECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
Benny Halevy4aece6a2009-04-01 09:23:26 -040028#define CB_OP_SEQUENCE_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \
29 4 + 1 + 3)
Alexandros Batsakis31f09602009-12-05 13:27:02 -050030#define CB_OP_RECALLANY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
Andy Adamsonb9efa1b2010-01-20 16:06:27 -050031#define CB_OP_RECALLSLOT_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
Benny Halevy4aece6a2009-04-01 09:23:26 -040032#endif /* CONFIG_NFS_V4_1 */
33
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#define NFSDBG_FACILITY NFSDBG_CALLBACK
35
Andy Adamson31d2b432010-01-14 17:45:04 -050036/* Internal error code */
37#define NFS4ERR_RESOURCE_HDR 11050
38
Andy Adamsonc36fca52011-01-06 02:04:32 +000039typedef __be32 (*callback_process_op_t)(void *, void *,
40 struct cb_process_state *);
Al Viroe6f684f2006-10-19 23:28:50 -070041typedef __be32 (*callback_decode_arg_t)(struct svc_rqst *, struct xdr_stream *, void *);
42typedef __be32 (*callback_encode_res_t)(struct svc_rqst *, struct xdr_stream *, void *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
44
45struct callback_op {
46 callback_process_op_t process_op;
47 callback_decode_arg_t decode_args;
48 callback_encode_res_t encode_res;
49 long res_maxsize;
50};
51
52static struct callback_op callback_ops[];
53
Al Viro7111c662006-10-19 23:28:45 -070054static __be32 nfs4_callback_null(struct svc_rqst *rqstp, void *argp, void *resp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070055{
56 return htonl(NFS4_OK);
57}
58
Al Viro5704fde2006-10-19 23:28:51 -070059static int nfs4_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
Linus Torvalds1da177e2005-04-16 15:20:36 -070060{
61 return xdr_argsize_check(rqstp, p);
62}
63
Al Viro5704fde2006-10-19 23:28:51 -070064static int nfs4_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
Linus Torvalds1da177e2005-04-16 15:20:36 -070065{
66 return xdr_ressize_check(rqstp, p);
67}
68
Al Viro5704fde2006-10-19 23:28:51 -070069static __be32 *read_buf(struct xdr_stream *xdr, int nbytes)
Linus Torvalds1da177e2005-04-16 15:20:36 -070070{
Al Viro5704fde2006-10-19 23:28:51 -070071 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
73 p = xdr_inline_decode(xdr, nbytes);
74 if (unlikely(p == NULL))
75 printk(KERN_WARNING "NFSv4 callback reply buffer overflowed!\n");
76 return p;
77}
78
Al Viroe6f684f2006-10-19 23:28:50 -070079static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len, const char **str)
Linus Torvalds1da177e2005-04-16 15:20:36 -070080{
Al Viro5704fde2006-10-19 23:28:51 -070081 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
83 p = read_buf(xdr, 4);
84 if (unlikely(p == NULL))
85 return htonl(NFS4ERR_RESOURCE);
86 *len = ntohl(*p);
87
88 if (*len != 0) {
89 p = read_buf(xdr, *len);
90 if (unlikely(p == NULL))
91 return htonl(NFS4ERR_RESOURCE);
92 *str = (const char *)p;
93 } else
94 *str = NULL;
95
96 return 0;
97}
98
Al Viroe6f684f2006-10-19 23:28:50 -070099static __be32 decode_fh(struct xdr_stream *xdr, struct nfs_fh *fh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100{
Al Viro5704fde2006-10-19 23:28:51 -0700101 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
103 p = read_buf(xdr, 4);
104 if (unlikely(p == NULL))
105 return htonl(NFS4ERR_RESOURCE);
106 fh->size = ntohl(*p);
107 if (fh->size > NFS4_FHSIZE)
108 return htonl(NFS4ERR_BADHANDLE);
109 p = read_buf(xdr, fh->size);
110 if (unlikely(p == NULL))
111 return htonl(NFS4ERR_RESOURCE);
112 memcpy(&fh->data[0], p, fh->size);
113 memset(&fh->data[fh->size], 0, sizeof(fh->data) - fh->size);
114 return 0;
115}
116
Al Viroe6f684f2006-10-19 23:28:50 -0700117static __be32 decode_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118{
Al Viro5704fde2006-10-19 23:28:51 -0700119 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 unsigned int attrlen;
121
122 p = read_buf(xdr, 4);
123 if (unlikely(p == NULL))
124 return htonl(NFS4ERR_RESOURCE);
125 attrlen = ntohl(*p);
126 p = read_buf(xdr, attrlen << 2);
127 if (unlikely(p == NULL))
128 return htonl(NFS4ERR_RESOURCE);
129 if (likely(attrlen > 0))
130 bitmap[0] = ntohl(*p++);
131 if (attrlen > 1)
132 bitmap[1] = ntohl(*p);
133 return 0;
134}
135
Al Viroe6f684f2006-10-19 23:28:50 -0700136static __be32 decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137{
Al Viro5704fde2006-10-19 23:28:51 -0700138 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
140 p = read_buf(xdr, 16);
141 if (unlikely(p == NULL))
142 return htonl(NFS4ERR_RESOURCE);
143 memcpy(stateid->data, p, 16);
144 return 0;
145}
146
Al Viroe6f684f2006-10-19 23:28:50 -0700147static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound_hdr_arg *hdr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148{
Al Viro5704fde2006-10-19 23:28:51 -0700149 __be32 *p;
Al Viroe6f684f2006-10-19 23:28:50 -0700150 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
152 status = decode_string(xdr, &hdr->taglen, &hdr->tag);
153 if (unlikely(status != 0))
154 return status;
155 /* We do not like overly long tags! */
Chuck Lever5cce4282007-10-26 13:33:01 -0400156 if (hdr->taglen > CB_OP_TAGLEN_MAXSZ - 12) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 printk("NFSv4 CALLBACK %s: client sent tag of length %u\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -0700158 __func__, hdr->taglen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 return htonl(NFS4ERR_RESOURCE);
160 }
161 p = read_buf(xdr, 12);
162 if (unlikely(p == NULL))
163 return htonl(NFS4ERR_RESOURCE);
Benny Halevyb8f2ef82009-04-01 09:23:19 -0400164 hdr->minorversion = ntohl(*p++);
Benny Halevy48a9e2d2009-04-01 09:23:20 -0400165 /* Check minor version is zero or one. */
166 if (hdr->minorversion <= 1) {
Andy Adamsonc36fca52011-01-06 02:04:32 +0000167 hdr->cb_ident = ntohl(*p++); /* ignored by v4.1 */
Benny Halevy48a9e2d2009-04-01 09:23:20 -0400168 } else {
Benny Halevyb8f2ef82009-04-01 09:23:19 -0400169 printk(KERN_WARNING "%s: NFSv4 server callback with "
170 "illegal minor version %u!\n",
171 __func__, hdr->minorversion);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 return htonl(NFS4ERR_MINOR_VERS_MISMATCH);
173 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 hdr->nops = ntohl(*p);
Benny Halevyb8f2ef82009-04-01 09:23:19 -0400175 dprintk("%s: minorversion %d nops %d\n", __func__,
176 hdr->minorversion, hdr->nops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 return 0;
178}
179
Al Viroe6f684f2006-10-19 23:28:50 -0700180static __be32 decode_op_hdr(struct xdr_stream *xdr, unsigned int *op)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181{
Al Viro5704fde2006-10-19 23:28:51 -0700182 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 p = read_buf(xdr, 4);
184 if (unlikely(p == NULL))
Andy Adamson31d2b432010-01-14 17:45:04 -0500185 return htonl(NFS4ERR_RESOURCE_HDR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 *op = ntohl(*p);
187 return 0;
188}
189
Al Viroe6f684f2006-10-19 23:28:50 -0700190static __be32 decode_getattr_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_getattrargs *args)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191{
Al Viroe6f684f2006-10-19 23:28:50 -0700192 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193
194 status = decode_fh(xdr, &args->fh);
195 if (unlikely(status != 0))
196 goto out;
Chuck Lever671beed2007-12-10 14:58:22 -0500197 args->addr = svc_addr(rqstp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 status = decode_bitmap(xdr, args->bitmap);
199out:
Harvey Harrison3110ff82008-05-02 13:42:44 -0700200 dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 return status;
202}
203
Al Viroe6f684f2006-10-19 23:28:50 -0700204static __be32 decode_recall_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_recallargs *args)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205{
Al Viro5704fde2006-10-19 23:28:51 -0700206 __be32 *p;
Al Viroe6f684f2006-10-19 23:28:50 -0700207 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
Chuck Leverc1d35862007-12-10 14:58:29 -0500209 args->addr = svc_addr(rqstp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 status = decode_stateid(xdr, &args->stateid);
211 if (unlikely(status != 0))
212 goto out;
213 p = read_buf(xdr, 4);
214 if (unlikely(p == NULL)) {
215 status = htonl(NFS4ERR_RESOURCE);
216 goto out;
217 }
218 args->truncate = ntohl(*p);
219 status = decode_fh(xdr, &args->fh);
220out:
Harvey Harrison3110ff82008-05-02 13:42:44 -0700221 dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
Alexey Dobriyan3873bc52006-05-27 03:31:12 +0400222 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223}
224
Benny Halevy4aece6a2009-04-01 09:23:26 -0400225#if defined(CONFIG_NFS_V4_1)
226
Fred Isamanf2a62562011-01-06 11:36:29 +0000227static __be32 decode_layoutrecall_args(struct svc_rqst *rqstp,
228 struct xdr_stream *xdr,
229 struct cb_layoutrecallargs *args)
230{
231 __be32 *p;
232 __be32 status = 0;
233 uint32_t iomode;
234
235 args->cbl_addr = svc_addr(rqstp);
236 p = read_buf(xdr, 4 * sizeof(uint32_t));
237 if (unlikely(p == NULL)) {
238 status = htonl(NFS4ERR_BADXDR);
239 goto out;
240 }
241
242 args->cbl_layout_type = ntohl(*p++);
243 /* Depite the spec's xdr, iomode really belongs in the FILE switch,
244 * as it is unuseable and ignored with the other types.
245 */
246 iomode = ntohl(*p++);
247 args->cbl_layoutchanged = ntohl(*p++);
248 args->cbl_recall_type = ntohl(*p++);
249
250 if (args->cbl_recall_type == RETURN_FILE) {
251 args->cbl_range.iomode = iomode;
252 status = decode_fh(xdr, &args->cbl_fh);
253 if (unlikely(status != 0))
254 goto out;
255
256 p = read_buf(xdr, 2 * sizeof(uint64_t));
257 if (unlikely(p == NULL)) {
258 status = htonl(NFS4ERR_BADXDR);
259 goto out;
260 }
261 p = xdr_decode_hyper(p, &args->cbl_range.offset);
262 p = xdr_decode_hyper(p, &args->cbl_range.length);
263 status = decode_stateid(xdr, &args->cbl_stateid);
264 if (unlikely(status != 0))
265 goto out;
266 } else if (args->cbl_recall_type == RETURN_FSID) {
267 p = read_buf(xdr, 2 * sizeof(uint64_t));
268 if (unlikely(p == NULL)) {
269 status = htonl(NFS4ERR_BADXDR);
270 goto out;
271 }
272 p = xdr_decode_hyper(p, &args->cbl_fsid.major);
273 p = xdr_decode_hyper(p, &args->cbl_fsid.minor);
274 } else if (args->cbl_recall_type != RETURN_ALL) {
275 status = htonl(NFS4ERR_BADXDR);
276 goto out;
277 }
278 dprintk("%s: ltype 0x%x iomode %d changed %d recall_type %d\n",
279 __func__,
280 args->cbl_layout_type, iomode,
281 args->cbl_layoutchanged, args->cbl_recall_type);
282out:
283 dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
284 return status;
285}
286
Andy Adamson9733f0d2010-01-22 12:03:08 -0500287static __be32 decode_sessionid(struct xdr_stream *xdr,
Benny Halevy4aece6a2009-04-01 09:23:26 -0400288 struct nfs4_sessionid *sid)
289{
Andy Adamson9733f0d2010-01-22 12:03:08 -0500290 __be32 *p;
Benny Halevy4aece6a2009-04-01 09:23:26 -0400291 int len = NFS4_MAX_SESSIONID_LEN;
292
293 p = read_buf(xdr, len);
294 if (unlikely(p == NULL))
Joe Perchesa419aef2009-08-18 11:18:35 -0700295 return htonl(NFS4ERR_RESOURCE);
Benny Halevy4aece6a2009-04-01 09:23:26 -0400296
297 memcpy(sid->data, p, len);
298 return 0;
299}
300
Andy Adamson9733f0d2010-01-22 12:03:08 -0500301static __be32 decode_rc_list(struct xdr_stream *xdr,
Benny Halevy4aece6a2009-04-01 09:23:26 -0400302 struct referring_call_list *rc_list)
303{
Andy Adamson9733f0d2010-01-22 12:03:08 -0500304 __be32 *p;
Benny Halevy4aece6a2009-04-01 09:23:26 -0400305 int i;
Andy Adamson9733f0d2010-01-22 12:03:08 -0500306 __be32 status;
Benny Halevy4aece6a2009-04-01 09:23:26 -0400307
308 status = decode_sessionid(xdr, &rc_list->rcl_sessionid);
309 if (status)
310 goto out;
311
312 status = htonl(NFS4ERR_RESOURCE);
313 p = read_buf(xdr, sizeof(uint32_t));
314 if (unlikely(p == NULL))
315 goto out;
316
317 rc_list->rcl_nrefcalls = ntohl(*p++);
318 if (rc_list->rcl_nrefcalls) {
319 p = read_buf(xdr,
320 rc_list->rcl_nrefcalls * 2 * sizeof(uint32_t));
321 if (unlikely(p == NULL))
322 goto out;
323 rc_list->rcl_refcalls = kmalloc(rc_list->rcl_nrefcalls *
324 sizeof(*rc_list->rcl_refcalls),
325 GFP_KERNEL);
326 if (unlikely(rc_list->rcl_refcalls == NULL))
327 goto out;
328 for (i = 0; i < rc_list->rcl_nrefcalls; i++) {
329 rc_list->rcl_refcalls[i].rc_sequenceid = ntohl(*p++);
330 rc_list->rcl_refcalls[i].rc_slotid = ntohl(*p++);
331 }
332 }
333 status = 0;
334
335out:
336 return status;
337}
338
Andy Adamson9733f0d2010-01-22 12:03:08 -0500339static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp,
Benny Halevy4aece6a2009-04-01 09:23:26 -0400340 struct xdr_stream *xdr,
341 struct cb_sequenceargs *args)
342{
Andy Adamson9733f0d2010-01-22 12:03:08 -0500343 __be32 *p;
Benny Halevy4aece6a2009-04-01 09:23:26 -0400344 int i;
Andy Adamson9733f0d2010-01-22 12:03:08 -0500345 __be32 status;
Benny Halevy4aece6a2009-04-01 09:23:26 -0400346
347 status = decode_sessionid(xdr, &args->csa_sessionid);
348 if (status)
349 goto out;
350
351 status = htonl(NFS4ERR_RESOURCE);
352 p = read_buf(xdr, 5 * sizeof(uint32_t));
353 if (unlikely(p == NULL))
354 goto out;
355
Ricardo Labiaga65fc64e2009-04-01 09:23:30 -0400356 args->csa_addr = svc_addr(rqstp);
Benny Halevy4aece6a2009-04-01 09:23:26 -0400357 args->csa_sequenceid = ntohl(*p++);
358 args->csa_slotid = ntohl(*p++);
359 args->csa_highestslotid = ntohl(*p++);
360 args->csa_cachethis = ntohl(*p++);
361 args->csa_nrclists = ntohl(*p++);
362 args->csa_rclists = NULL;
363 if (args->csa_nrclists) {
364 args->csa_rclists = kmalloc(args->csa_nrclists *
365 sizeof(*args->csa_rclists),
366 GFP_KERNEL);
367 if (unlikely(args->csa_rclists == NULL))
368 goto out;
369
370 for (i = 0; i < args->csa_nrclists; i++) {
371 status = decode_rc_list(xdr, &args->csa_rclists[i]);
372 if (status)
373 goto out_free;
374 }
375 }
376 status = 0;
377
378 dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u slotid %u "
379 "highestslotid %u cachethis %d nrclists %u\n",
380 __func__,
381 ((u32 *)&args->csa_sessionid)[0],
382 ((u32 *)&args->csa_sessionid)[1],
383 ((u32 *)&args->csa_sessionid)[2],
384 ((u32 *)&args->csa_sessionid)[3],
385 args->csa_sequenceid, args->csa_slotid,
386 args->csa_highestslotid, args->csa_cachethis,
387 args->csa_nrclists);
388out:
389 dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
390 return status;
391
392out_free:
393 for (i = 0; i < args->csa_nrclists; i++)
394 kfree(args->csa_rclists[i].rcl_refcalls);
395 kfree(args->csa_rclists);
396 goto out;
397}
398
Andy Adamson9733f0d2010-01-22 12:03:08 -0500399static __be32 decode_recallany_args(struct svc_rqst *rqstp,
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500400 struct xdr_stream *xdr,
401 struct cb_recallanyargs *args)
402{
Andy Adamson9733f0d2010-01-22 12:03:08 -0500403 __be32 *p;
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500404
405 args->craa_addr = svc_addr(rqstp);
406 p = read_buf(xdr, 4);
407 if (unlikely(p == NULL))
408 return htonl(NFS4ERR_BADXDR);
409 args->craa_objs_to_keep = ntohl(*p++);
410 p = read_buf(xdr, 4);
411 if (unlikely(p == NULL))
412 return htonl(NFS4ERR_BADXDR);
413 args->craa_type_mask = ntohl(*p);
414
415 return 0;
416}
417
Andy Adamson9733f0d2010-01-22 12:03:08 -0500418static __be32 decode_recallslot_args(struct svc_rqst *rqstp,
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500419 struct xdr_stream *xdr,
420 struct cb_recallslotargs *args)
421{
422 __be32 *p;
423
424 args->crsa_addr = svc_addr(rqstp);
425 p = read_buf(xdr, 4);
426 if (unlikely(p == NULL))
427 return htonl(NFS4ERR_BADXDR);
428 args->crsa_target_max_slots = ntohl(*p++);
429 return 0;
430}
431
Benny Halevy4aece6a2009-04-01 09:23:26 -0400432#endif /* CONFIG_NFS_V4_1 */
433
Al Viroe6f684f2006-10-19 23:28:50 -0700434static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435{
Al Viro5704fde2006-10-19 23:28:51 -0700436 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437
438 p = xdr_reserve_space(xdr, 4 + len);
439 if (unlikely(p == NULL))
440 return htonl(NFS4ERR_RESOURCE);
441 xdr_encode_opaque(p, str, len);
442 return 0;
443}
444
445#define CB_SUPPORTED_ATTR0 (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE)
446#define CB_SUPPORTED_ATTR1 (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY)
Al Viro5704fde2006-10-19 23:28:51 -0700447static __be32 encode_attr_bitmap(struct xdr_stream *xdr, const uint32_t *bitmap, __be32 **savep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448{
Al Viro5704fde2006-10-19 23:28:51 -0700449 __be32 bm[2];
450 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
452 bm[0] = htonl(bitmap[0] & CB_SUPPORTED_ATTR0);
453 bm[1] = htonl(bitmap[1] & CB_SUPPORTED_ATTR1);
454 if (bm[1] != 0) {
455 p = xdr_reserve_space(xdr, 16);
456 if (unlikely(p == NULL))
457 return htonl(NFS4ERR_RESOURCE);
458 *p++ = htonl(2);
459 *p++ = bm[0];
460 *p++ = bm[1];
461 } else if (bm[0] != 0) {
462 p = xdr_reserve_space(xdr, 12);
463 if (unlikely(p == NULL))
464 return htonl(NFS4ERR_RESOURCE);
465 *p++ = htonl(1);
466 *p++ = bm[0];
467 } else {
468 p = xdr_reserve_space(xdr, 8);
469 if (unlikely(p == NULL))
470 return htonl(NFS4ERR_RESOURCE);
471 *p++ = htonl(0);
472 }
473 *savep = p;
474 return 0;
475}
476
Al Viroe6f684f2006-10-19 23:28:50 -0700477static __be32 encode_attr_change(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t change)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478{
Al Viro5704fde2006-10-19 23:28:51 -0700479 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
481 if (!(bitmap[0] & FATTR4_WORD0_CHANGE))
482 return 0;
483 p = xdr_reserve_space(xdr, 8);
Harvey Harrison90dc7d22008-02-20 13:03:05 -0800484 if (unlikely(!p))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 return htonl(NFS4ERR_RESOURCE);
486 p = xdr_encode_hyper(p, change);
487 return 0;
488}
489
Al Viroe6f684f2006-10-19 23:28:50 -0700490static __be32 encode_attr_size(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491{
Al Viro5704fde2006-10-19 23:28:51 -0700492 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493
494 if (!(bitmap[0] & FATTR4_WORD0_SIZE))
495 return 0;
496 p = xdr_reserve_space(xdr, 8);
Harvey Harrison90dc7d22008-02-20 13:03:05 -0800497 if (unlikely(!p))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 return htonl(NFS4ERR_RESOURCE);
499 p = xdr_encode_hyper(p, size);
500 return 0;
501}
502
Al Viroe6f684f2006-10-19 23:28:50 -0700503static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec *time)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504{
Al Viro5704fde2006-10-19 23:28:51 -0700505 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506
507 p = xdr_reserve_space(xdr, 12);
Harvey Harrison90dc7d22008-02-20 13:03:05 -0800508 if (unlikely(!p))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 return htonl(NFS4ERR_RESOURCE);
510 p = xdr_encode_hyper(p, time->tv_sec);
511 *p = htonl(time->tv_nsec);
512 return 0;
513}
514
Al Viroe6f684f2006-10-19 23:28:50 -0700515static __be32 encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516{
517 if (!(bitmap[1] & FATTR4_WORD1_TIME_METADATA))
518 return 0;
519 return encode_attr_time(xdr,time);
520}
521
Al Viroe6f684f2006-10-19 23:28:50 -0700522static __be32 encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523{
524 if (!(bitmap[1] & FATTR4_WORD1_TIME_MODIFY))
525 return 0;
526 return encode_attr_time(xdr,time);
527}
528
Al Viroe6f684f2006-10-19 23:28:50 -0700529static __be32 encode_compound_hdr_res(struct xdr_stream *xdr, struct cb_compound_hdr_res *hdr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530{
Al Viroe6f684f2006-10-19 23:28:50 -0700531 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532
533 hdr->status = xdr_reserve_space(xdr, 4);
534 if (unlikely(hdr->status == NULL))
535 return htonl(NFS4ERR_RESOURCE);
536 status = encode_string(xdr, hdr->taglen, hdr->tag);
537 if (unlikely(status != 0))
538 return status;
539 hdr->nops = xdr_reserve_space(xdr, 4);
540 if (unlikely(hdr->nops == NULL))
541 return htonl(NFS4ERR_RESOURCE);
542 return 0;
543}
544
Al Viroe6f684f2006-10-19 23:28:50 -0700545static __be32 encode_op_hdr(struct xdr_stream *xdr, uint32_t op, __be32 res)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546{
Al Viro5704fde2006-10-19 23:28:51 -0700547 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548
549 p = xdr_reserve_space(xdr, 8);
550 if (unlikely(p == NULL))
Andy Adamson31d2b432010-01-14 17:45:04 -0500551 return htonl(NFS4ERR_RESOURCE_HDR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 *p++ = htonl(op);
553 *p = res;
554 return 0;
555}
556
Al Viroe6f684f2006-10-19 23:28:50 -0700557static __be32 encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr, const struct cb_getattrres *res)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558{
Al Viro5704fde2006-10-19 23:28:51 -0700559 __be32 *savep = NULL;
Al Viroe6f684f2006-10-19 23:28:50 -0700560 __be32 status = res->status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561
562 if (unlikely(status != 0))
563 goto out;
564 status = encode_attr_bitmap(xdr, res->bitmap, &savep);
565 if (unlikely(status != 0))
566 goto out;
567 status = encode_attr_change(xdr, res->bitmap, res->change_attr);
568 if (unlikely(status != 0))
569 goto out;
570 status = encode_attr_size(xdr, res->bitmap, res->size);
571 if (unlikely(status != 0))
572 goto out;
573 status = encode_attr_ctime(xdr, res->bitmap, &res->ctime);
574 if (unlikely(status != 0))
575 goto out;
576 status = encode_attr_mtime(xdr, res->bitmap, &res->mtime);
577 *savep = htonl((unsigned int)((char *)xdr->p - (char *)(savep+1)));
578out:
Harvey Harrison3110ff82008-05-02 13:42:44 -0700579 dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 return status;
581}
582
Benny Halevy34bc47c92009-04-01 09:23:22 -0400583#if defined(CONFIG_NFS_V4_1)
584
Andy Adamson9733f0d2010-01-22 12:03:08 -0500585static __be32 encode_sessionid(struct xdr_stream *xdr,
Benny Halevy4aece6a2009-04-01 09:23:26 -0400586 const struct nfs4_sessionid *sid)
587{
Andy Adamson9733f0d2010-01-22 12:03:08 -0500588 __be32 *p;
Benny Halevy4aece6a2009-04-01 09:23:26 -0400589 int len = NFS4_MAX_SESSIONID_LEN;
590
591 p = xdr_reserve_space(xdr, len);
592 if (unlikely(p == NULL))
593 return htonl(NFS4ERR_RESOURCE);
594
595 memcpy(p, sid, len);
596 return 0;
597}
598
Andy Adamson9733f0d2010-01-22 12:03:08 -0500599static __be32 encode_cb_sequence_res(struct svc_rqst *rqstp,
Benny Halevy4aece6a2009-04-01 09:23:26 -0400600 struct xdr_stream *xdr,
601 const struct cb_sequenceres *res)
602{
Andy Adamson9733f0d2010-01-22 12:03:08 -0500603 __be32 *p;
Benny Halevy4aece6a2009-04-01 09:23:26 -0400604 unsigned status = res->csr_status;
605
606 if (unlikely(status != 0))
607 goto out;
608
609 encode_sessionid(xdr, &res->csr_sessionid);
610
611 p = xdr_reserve_space(xdr, 4 * sizeof(uint32_t));
612 if (unlikely(p == NULL))
613 return htonl(NFS4ERR_RESOURCE);
614
615 *p++ = htonl(res->csr_sequenceid);
616 *p++ = htonl(res->csr_slotid);
617 *p++ = htonl(res->csr_highestslotid);
618 *p++ = htonl(res->csr_target_highestslotid);
619out:
620 dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
621 return status;
622}
623
Benny Halevy34bc47c92009-04-01 09:23:22 -0400624static __be32
625preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op)
626{
Benny Halevy281fe152009-04-01 09:23:27 -0400627 if (op_nr == OP_CB_SEQUENCE) {
628 if (nop != 0)
629 return htonl(NFS4ERR_SEQUENCE_POS);
630 } else {
631 if (nop == 0)
632 return htonl(NFS4ERR_OP_NOT_IN_SESSION);
633 }
634
Benny Halevy34bc47c92009-04-01 09:23:22 -0400635 switch (op_nr) {
636 case OP_CB_GETATTR:
637 case OP_CB_RECALL:
Benny Halevy4aece6a2009-04-01 09:23:26 -0400638 case OP_CB_SEQUENCE:
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500639 case OP_CB_RECALL_ANY:
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500640 case OP_CB_RECALL_SLOT:
Fred Isamanf2a62562011-01-06 11:36:29 +0000641 case OP_CB_LAYOUTRECALL:
Benny Halevy34bc47c92009-04-01 09:23:22 -0400642 *op = &callback_ops[op_nr];
643 break;
644
Benny Halevy34bc47c92009-04-01 09:23:22 -0400645 case OP_CB_NOTIFY_DEVICEID:
646 case OP_CB_NOTIFY:
647 case OP_CB_PUSH_DELEG:
Benny Halevy34bc47c92009-04-01 09:23:22 -0400648 case OP_CB_RECALLABLE_OBJ_AVAIL:
Benny Halevy34bc47c92009-04-01 09:23:22 -0400649 case OP_CB_WANTS_CANCELLED:
650 case OP_CB_NOTIFY_LOCK:
651 return htonl(NFS4ERR_NOTSUPP);
652
653 default:
654 return htonl(NFS4ERR_OP_ILLEGAL);
655 }
656
657 return htonl(NFS_OK);
658}
659
Andy Adamson42acd022011-01-06 02:04:34 +0000660static void nfs4_callback_free_slot(struct nfs4_session *session)
661{
662 struct nfs4_slot_table *tbl = &session->bc_slot_table;
663
664 spin_lock(&tbl->slot_tbl_lock);
665 /*
666 * Let the state manager know callback processing done.
667 * A single slot, so highest used slotid is either 0 or -1
668 */
669 tbl->highest_used_slotid--;
670 nfs4_check_drain_bc_complete(session);
671 spin_unlock(&tbl->slot_tbl_lock);
672}
673
674static void nfs4_cb_free_slot(struct nfs_client *clp)
675{
676 if (clp && clp->cl_session)
677 nfs4_callback_free_slot(clp->cl_session);
678}
679
680/* A single slot, so highest used slotid is either 0 or -1 */
681void nfs4_cb_take_slot(struct nfs_client *clp)
682{
683 struct nfs4_slot_table *tbl = &clp->cl_session->bc_slot_table;
684
685 spin_lock(&tbl->slot_tbl_lock);
686 tbl->highest_used_slotid++;
687 BUG_ON(tbl->highest_used_slotid != 0);
688 spin_unlock(&tbl->slot_tbl_lock);
689}
690
Benny Halevy34bc47c92009-04-01 09:23:22 -0400691#else /* CONFIG_NFS_V4_1 */
692
693static __be32
694preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op)
695{
696 return htonl(NFS4ERR_MINOR_VERS_MISMATCH);
697}
698
Andy Adamson42acd022011-01-06 02:04:34 +0000699static void nfs4_cb_free_slot(struct nfs_client *clp)
700{
701}
Benny Halevy34bc47c92009-04-01 09:23:22 -0400702#endif /* CONFIG_NFS_V4_1 */
703
704static __be32
705preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op)
706{
707 switch (op_nr) {
708 case OP_CB_GETATTR:
709 case OP_CB_RECALL:
710 *op = &callback_ops[op_nr];
711 break;
712 default:
713 return htonl(NFS4ERR_OP_ILLEGAL);
714 }
715
716 return htonl(NFS_OK);
717}
718
719static __be32 process_op(uint32_t minorversion, int nop,
720 struct svc_rqst *rqstp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 struct xdr_stream *xdr_in, void *argp,
Andy Adamsonc36fca52011-01-06 02:04:32 +0000722 struct xdr_stream *xdr_out, void *resp,
723 struct cb_process_state *cps)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724{
Trond Myklebusta162a6b2006-03-20 13:44:10 -0500725 struct callback_op *op = &callback_ops[0];
Andy Adamson31d2b432010-01-14 17:45:04 -0500726 unsigned int op_nr;
Benny Halevy34bc47c92009-04-01 09:23:22 -0400727 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 long maxlen;
Al Viroe6f684f2006-10-19 23:28:50 -0700729 __be32 res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730
Harvey Harrison3110ff82008-05-02 13:42:44 -0700731 dprintk("%s: start\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 status = decode_op_hdr(xdr_in, &op_nr);
Andy Adamson31d2b432010-01-14 17:45:04 -0500733 if (unlikely(status))
734 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735
Benny Halevy34bc47c92009-04-01 09:23:22 -0400736 dprintk("%s: minorversion=%d nop=%d op_nr=%u\n",
737 __func__, minorversion, nop, op_nr);
738
739 status = minorversion ? preprocess_nfs41_op(nop, op_nr, &op) :
740 preprocess_nfs4_op(op_nr, &op);
741 if (status == htonl(NFS4ERR_OP_ILLEGAL))
742 op_nr = OP_CB_ILLEGAL;
Andy Adamsonb92b3012010-01-14 17:45:05 -0500743 if (status)
744 goto encode_hdr;
Andy Adamson31d2b432010-01-14 17:45:04 -0500745
Andy Adamsonc36fca52011-01-06 02:04:32 +0000746 if (cps->drc_status) {
747 status = cps->drc_status;
Andy Adamson49110962010-01-14 17:45:08 -0500748 goto encode_hdr;
749 }
750
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 maxlen = xdr_out->end - xdr_out->p;
752 if (maxlen > 0 && maxlen < PAGE_SIZE) {
Andy Adamsone95e60d2010-01-14 17:45:06 -0500753 status = op->decode_args(rqstp, xdr_in, argp);
754 if (likely(status == 0))
Andy Adamsonc36fca52011-01-06 02:04:32 +0000755 status = op->process_op(argp, resp, cps);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 } else
757 status = htonl(NFS4ERR_RESOURCE);
758
Andy Adamsonb92b3012010-01-14 17:45:05 -0500759encode_hdr:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 res = encode_op_hdr(xdr_out, op_nr, status);
Andy Adamson31d2b432010-01-14 17:45:04 -0500761 if (unlikely(res))
762 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 if (op->encode_res != NULL && status == 0)
764 status = op->encode_res(rqstp, xdr_out, resp);
Harvey Harrison3110ff82008-05-02 13:42:44 -0700765 dprintk("%s: done, status = %d\n", __func__, ntohl(status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 return status;
767}
768
769/*
770 * Decode, process and encode a COMPOUND
771 */
Al Viro7111c662006-10-19 23:28:45 -0700772static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *resp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773{
Trond Myklebust3a6258e2008-05-06 13:32:40 -0400774 struct cb_compound_hdr_arg hdr_arg = { 0 };
775 struct cb_compound_hdr_res hdr_res = { NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 struct xdr_stream xdr_in, xdr_out;
Andy Adamsonc36fca52011-01-06 02:04:32 +0000777 __be32 *p, status;
778 struct cb_process_state cps = {
779 .drc_status = 0,
780 .clp = NULL,
781 };
Trond Myklebust3a6258e2008-05-06 13:32:40 -0400782 unsigned int nops = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783
Harvey Harrison3110ff82008-05-02 13:42:44 -0700784 dprintk("%s: start\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785
786 xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base);
787
Al Viro5704fde2006-10-19 23:28:51 -0700788 p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 xdr_init_encode(&xdr_out, &rqstp->rq_res, p);
790
Trond Myklebust3a6258e2008-05-06 13:32:40 -0400791 status = decode_compound_hdr_arg(&xdr_in, &hdr_arg);
792 if (status == __constant_htonl(NFS4ERR_RESOURCE))
793 return rpc_garbage_args;
794
Andy Adamsonc36fca52011-01-06 02:04:32 +0000795 if (hdr_arg.minorversion == 0) {
796 cps.clp = nfs4_find_client_ident(hdr_arg.cb_ident);
Andy Adamson778be232011-01-25 15:38:01 +0000797 if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp))
Andy Adamsonc36fca52011-01-06 02:04:32 +0000798 return rpc_drop_reply;
Andy Adamson778be232011-01-25 15:38:01 +0000799 }
Andy Adamsonc36fca52011-01-06 02:04:32 +0000800
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 hdr_res.taglen = hdr_arg.taglen;
802 hdr_res.tag = hdr_arg.tag;
Trond Myklebust3a6258e2008-05-06 13:32:40 -0400803 if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0)
804 return rpc_system_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805
Trond Myklebust3a6258e2008-05-06 13:32:40 -0400806 while (status == 0 && nops != hdr_arg.nops) {
Andy Adamson49110962010-01-14 17:45:08 -0500807 status = process_op(hdr_arg.minorversion, nops, rqstp,
Andy Adamsonc36fca52011-01-06 02:04:32 +0000808 &xdr_in, argp, &xdr_out, resp, &cps);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 nops++;
810 }
Trond Myklebust3a6258e2008-05-06 13:32:40 -0400811
Andy Adamson31d2b432010-01-14 17:45:04 -0500812 /* Buffer overflow in decode_ops_hdr or encode_ops_hdr. Return
813 * resource error in cb_compound status without returning op */
814 if (unlikely(status == htonl(NFS4ERR_RESOURCE_HDR))) {
815 status = htonl(NFS4ERR_RESOURCE);
816 nops--;
817 }
818
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819 *hdr_res.status = status;
820 *hdr_res.nops = htonl(nops);
Andy Adamson42acd022011-01-06 02:04:34 +0000821 nfs4_cb_free_slot(cps.clp);
Andy Adamsonc36fca52011-01-06 02:04:32 +0000822 nfs_put_client(cps.clp);
Harvey Harrison3110ff82008-05-02 13:42:44 -0700823 dprintk("%s: done, status = %u\n", __func__, ntohl(status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 return rpc_success;
825}
826
827/*
828 * Define NFS4 callback COMPOUND ops.
829 */
830static struct callback_op callback_ops[] = {
831 [0] = {
832 .res_maxsize = CB_OP_HDR_RES_MAXSZ,
833 },
834 [OP_CB_GETATTR] = {
835 .process_op = (callback_process_op_t)nfs4_callback_getattr,
836 .decode_args = (callback_decode_arg_t)decode_getattr_args,
837 .encode_res = (callback_encode_res_t)encode_getattr_res,
838 .res_maxsize = CB_OP_GETATTR_RES_MAXSZ,
839 },
840 [OP_CB_RECALL] = {
841 .process_op = (callback_process_op_t)nfs4_callback_recall,
842 .decode_args = (callback_decode_arg_t)decode_recall_args,
843 .res_maxsize = CB_OP_RECALL_RES_MAXSZ,
Benny Halevy4aece6a2009-04-01 09:23:26 -0400844 },
845#if defined(CONFIG_NFS_V4_1)
Fred Isamanf2a62562011-01-06 11:36:29 +0000846 [OP_CB_LAYOUTRECALL] = {
847 .process_op = (callback_process_op_t)nfs4_callback_layoutrecall,
848 .decode_args =
849 (callback_decode_arg_t)decode_layoutrecall_args,
850 .res_maxsize = CB_OP_LAYOUTRECALL_RES_MAXSZ,
851 },
Benny Halevy4aece6a2009-04-01 09:23:26 -0400852 [OP_CB_SEQUENCE] = {
853 .process_op = (callback_process_op_t)nfs4_callback_sequence,
854 .decode_args = (callback_decode_arg_t)decode_cb_sequence_args,
855 .encode_res = (callback_encode_res_t)encode_cb_sequence_res,
856 .res_maxsize = CB_OP_SEQUENCE_RES_MAXSZ,
857 },
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500858 [OP_CB_RECALL_ANY] = {
859 .process_op = (callback_process_op_t)nfs4_callback_recallany,
860 .decode_args = (callback_decode_arg_t)decode_recallany_args,
861 .res_maxsize = CB_OP_RECALLANY_RES_MAXSZ,
862 },
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500863 [OP_CB_RECALL_SLOT] = {
864 .process_op = (callback_process_op_t)nfs4_callback_recallslot,
865 .decode_args = (callback_decode_arg_t)decode_recallslot_args,
866 .res_maxsize = CB_OP_RECALLSLOT_RES_MAXSZ,
867 },
Benny Halevy4aece6a2009-04-01 09:23:26 -0400868#endif /* CONFIG_NFS_V4_1 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869};
870
871/*
872 * Define NFS4 callback procedures
873 */
874static struct svc_procedure nfs4_callback_procedures1[] = {
875 [CB_NULL] = {
876 .pc_func = nfs4_callback_null,
877 .pc_decode = (kxdrproc_t)nfs4_decode_void,
878 .pc_encode = (kxdrproc_t)nfs4_encode_void,
879 .pc_xdrressize = 1,
880 },
881 [CB_COMPOUND] = {
882 .pc_func = nfs4_callback_compound,
883 .pc_encode = (kxdrproc_t)nfs4_encode_void,
884 .pc_argsize = 256,
885 .pc_ressize = 256,
886 .pc_xdrressize = NFS4_CALLBACK_BUFSIZE,
887 }
888};
889
890struct svc_version nfs4_callback_version1 = {
891 .vs_vers = 1,
892 .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1),
893 .vs_proc = nfs4_callback_procedures1,
894 .vs_xdrsize = NFS4_CALLBACK_XDRSIZE,
895 .vs_dispatch = NULL,
Steve Dickson49697ee2009-10-13 16:07:33 -0400896 .vs_hidden = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897};
898
Alexandros Batsakis07bccc22009-12-05 13:19:01 -0500899struct svc_version nfs4_callback_version4 = {
900 .vs_vers = 4,
901 .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1),
902 .vs_proc = nfs4_callback_procedures1,
903 .vs_xdrsize = NFS4_CALLBACK_XDRSIZE,
904 .vs_dispatch = NULL,
905};