blob: 59461c957d9d7ed7204e09f9fad1aa0b154d8486 [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>
Trond Myklebust9a3ba432012-03-12 18:01:48 -040012#include <linux/ratelimit.h>
13#include <linux/printk.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090014#include <linux/slab.h>
Andy Adamsonc36fca52011-01-06 02:04:32 +000015#include <linux/sunrpc/bc_xprt.h>
Trond Myklebust4ce79712005-06-22 17:16:21 +000016#include "nfs4_fs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include "callback.h"
Andy Adamsonc36fca52011-01-06 02:04:32 +000018#include "internal.h"
Trond Myklebust76e697b2012-11-26 14:20:49 -050019#include "nfs4session.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070020
21#define CB_OP_TAGLEN_MAXSZ (512)
22#define CB_OP_HDR_RES_MAXSZ (2 + CB_OP_TAGLEN_MAXSZ)
23#define CB_OP_GETATTR_BITMAP_MAXSZ (4)
24#define CB_OP_GETATTR_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \
25 CB_OP_GETATTR_BITMAP_MAXSZ + \
26 2 + 2 + 3 + 3)
27#define CB_OP_RECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
28
Benny Halevy4aece6a2009-04-01 09:23:26 -040029#if defined(CONFIG_NFS_V4_1)
Fred Isamanf2a62562011-01-06 11:36:29 +000030#define CB_OP_LAYOUTRECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
Marc Eshel1be56832011-05-22 19:47:09 +030031#define CB_OP_DEVICENOTIFY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
Benny Halevy4aece6a2009-04-01 09:23:26 -040032#define CB_OP_SEQUENCE_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \
33 4 + 1 + 3)
Alexandros Batsakis31f09602009-12-05 13:27:02 -050034#define CB_OP_RECALLANY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
Andy Adamsonb9efa1b2010-01-20 16:06:27 -050035#define CB_OP_RECALLSLOT_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
Benny Halevy4aece6a2009-04-01 09:23:26 -040036#endif /* CONFIG_NFS_V4_1 */
37
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#define NFSDBG_FACILITY NFSDBG_CALLBACK
39
Andy Adamson31d2b432010-01-14 17:45:04 -050040/* Internal error code */
41#define NFS4ERR_RESOURCE_HDR 11050
42
Andy Adamsonc36fca52011-01-06 02:04:32 +000043typedef __be32 (*callback_process_op_t)(void *, void *,
44 struct cb_process_state *);
Al Viroe6f684f2006-10-19 23:28:50 -070045typedef __be32 (*callback_decode_arg_t)(struct svc_rqst *, struct xdr_stream *, void *);
46typedef __be32 (*callback_encode_res_t)(struct svc_rqst *, struct xdr_stream *, void *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
48
49struct callback_op {
50 callback_process_op_t process_op;
51 callback_decode_arg_t decode_args;
52 callback_encode_res_t encode_res;
53 long res_maxsize;
54};
55
56static struct callback_op callback_ops[];
57
Al Viro7111c662006-10-19 23:28:45 -070058static __be32 nfs4_callback_null(struct svc_rqst *rqstp, void *argp, void *resp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070059{
60 return htonl(NFS4_OK);
61}
62
Al Viro5704fde2006-10-19 23:28:51 -070063static int nfs4_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
Linus Torvalds1da177e2005-04-16 15:20:36 -070064{
65 return xdr_argsize_check(rqstp, p);
66}
67
Al Viro5704fde2006-10-19 23:28:51 -070068static int nfs4_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
Linus Torvalds1da177e2005-04-16 15:20:36 -070069{
70 return xdr_ressize_check(rqstp, p);
71}
72
Al Viro5704fde2006-10-19 23:28:51 -070073static __be32 *read_buf(struct xdr_stream *xdr, int nbytes)
Linus Torvalds1da177e2005-04-16 15:20:36 -070074{
Al Viro5704fde2006-10-19 23:28:51 -070075 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
77 p = xdr_inline_decode(xdr, nbytes);
78 if (unlikely(p == NULL))
Weston Andros Adamsona0308892012-01-26 13:32:23 -050079 printk(KERN_WARNING "NFS: NFSv4 callback reply buffer overflowed!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 return p;
81}
82
Al Viroe6f684f2006-10-19 23:28:50 -070083static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len, const char **str)
Linus Torvalds1da177e2005-04-16 15:20:36 -070084{
Al Viro5704fde2006-10-19 23:28:51 -070085 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
87 p = read_buf(xdr, 4);
88 if (unlikely(p == NULL))
89 return htonl(NFS4ERR_RESOURCE);
90 *len = ntohl(*p);
91
92 if (*len != 0) {
93 p = read_buf(xdr, *len);
94 if (unlikely(p == NULL))
95 return htonl(NFS4ERR_RESOURCE);
96 *str = (const char *)p;
97 } else
98 *str = NULL;
99
100 return 0;
101}
102
Al Viroe6f684f2006-10-19 23:28:50 -0700103static __be32 decode_fh(struct xdr_stream *xdr, struct nfs_fh *fh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104{
Al Viro5704fde2006-10-19 23:28:51 -0700105 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106
107 p = read_buf(xdr, 4);
108 if (unlikely(p == NULL))
109 return htonl(NFS4ERR_RESOURCE);
110 fh->size = ntohl(*p);
111 if (fh->size > NFS4_FHSIZE)
112 return htonl(NFS4ERR_BADHANDLE);
113 p = read_buf(xdr, fh->size);
114 if (unlikely(p == NULL))
115 return htonl(NFS4ERR_RESOURCE);
116 memcpy(&fh->data[0], p, fh->size);
117 memset(&fh->data[fh->size], 0, sizeof(fh->data) - fh->size);
118 return 0;
119}
120
Al Viroe6f684f2006-10-19 23:28:50 -0700121static __be32 decode_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122{
Al Viro5704fde2006-10-19 23:28:51 -0700123 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 unsigned int attrlen;
125
126 p = read_buf(xdr, 4);
127 if (unlikely(p == NULL))
128 return htonl(NFS4ERR_RESOURCE);
129 attrlen = ntohl(*p);
130 p = read_buf(xdr, attrlen << 2);
131 if (unlikely(p == NULL))
132 return htonl(NFS4ERR_RESOURCE);
133 if (likely(attrlen > 0))
134 bitmap[0] = ntohl(*p++);
135 if (attrlen > 1)
136 bitmap[1] = ntohl(*p);
137 return 0;
138}
139
Al Viroe6f684f2006-10-19 23:28:50 -0700140static __be32 decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141{
Al Viro5704fde2006-10-19 23:28:51 -0700142 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
Trond Myklebust2d2f24a2012-03-04 18:13:57 -0500144 p = read_buf(xdr, NFS4_STATEID_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 if (unlikely(p == NULL))
146 return htonl(NFS4ERR_RESOURCE);
Trond Myklebust2d2f24a2012-03-04 18:13:57 -0500147 memcpy(stateid, p, NFS4_STATEID_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 return 0;
149}
150
Al Viroe6f684f2006-10-19 23:28:50 -0700151static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound_hdr_arg *hdr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152{
Al Viro5704fde2006-10-19 23:28:51 -0700153 __be32 *p;
Al Viroe6f684f2006-10-19 23:28:50 -0700154 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
156 status = decode_string(xdr, &hdr->taglen, &hdr->tag);
157 if (unlikely(status != 0))
158 return status;
159 /* We do not like overly long tags! */
Chuck Lever5cce4282007-10-26 13:33:01 -0400160 if (hdr->taglen > CB_OP_TAGLEN_MAXSZ - 12) {
Weston Andros Adamsona0308892012-01-26 13:32:23 -0500161 printk("NFS: NFSv4 CALLBACK %s: client sent tag of length %u\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -0700162 __func__, hdr->taglen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 return htonl(NFS4ERR_RESOURCE);
164 }
165 p = read_buf(xdr, 12);
166 if (unlikely(p == NULL))
167 return htonl(NFS4ERR_RESOURCE);
Benny Halevyb8f2ef82009-04-01 09:23:19 -0400168 hdr->minorversion = ntohl(*p++);
Benny Halevy48a9e2d2009-04-01 09:23:20 -0400169 /* Check minor version is zero or one. */
170 if (hdr->minorversion <= 1) {
Andy Adamsonc36fca52011-01-06 02:04:32 +0000171 hdr->cb_ident = ntohl(*p++); /* ignored by v4.1 */
Benny Halevy48a9e2d2009-04-01 09:23:20 -0400172 } else {
Trond Myklebust9a3ba432012-03-12 18:01:48 -0400173 pr_warn_ratelimited("NFS: %s: NFSv4 server callback with "
Benny Halevyb8f2ef82009-04-01 09:23:19 -0400174 "illegal minor version %u!\n",
175 __func__, hdr->minorversion);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 return htonl(NFS4ERR_MINOR_VERS_MISMATCH);
177 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 hdr->nops = ntohl(*p);
Benny Halevyb8f2ef82009-04-01 09:23:19 -0400179 dprintk("%s: minorversion %d nops %d\n", __func__,
180 hdr->minorversion, hdr->nops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 return 0;
182}
183
Al Viroe6f684f2006-10-19 23:28:50 -0700184static __be32 decode_op_hdr(struct xdr_stream *xdr, unsigned int *op)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185{
Al Viro5704fde2006-10-19 23:28:51 -0700186 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 p = read_buf(xdr, 4);
188 if (unlikely(p == NULL))
Andy Adamson31d2b432010-01-14 17:45:04 -0500189 return htonl(NFS4ERR_RESOURCE_HDR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 *op = ntohl(*p);
191 return 0;
192}
193
Al Viroe6f684f2006-10-19 23:28:50 -0700194static __be32 decode_getattr_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_getattrargs *args)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195{
Al Viroe6f684f2006-10-19 23:28:50 -0700196 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
198 status = decode_fh(xdr, &args->fh);
199 if (unlikely(status != 0))
200 goto out;
Chuck Lever671beed2007-12-10 14:58:22 -0500201 args->addr = svc_addr(rqstp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 status = decode_bitmap(xdr, args->bitmap);
203out:
Harvey Harrison3110ff82008-05-02 13:42:44 -0700204 dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 return status;
206}
207
Al Viroe6f684f2006-10-19 23:28:50 -0700208static __be32 decode_recall_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_recallargs *args)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209{
Al Viro5704fde2006-10-19 23:28:51 -0700210 __be32 *p;
Al Viroe6f684f2006-10-19 23:28:50 -0700211 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212
Chuck Leverc1d35862007-12-10 14:58:29 -0500213 args->addr = svc_addr(rqstp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 status = decode_stateid(xdr, &args->stateid);
215 if (unlikely(status != 0))
216 goto out;
217 p = read_buf(xdr, 4);
218 if (unlikely(p == NULL)) {
219 status = htonl(NFS4ERR_RESOURCE);
220 goto out;
221 }
222 args->truncate = ntohl(*p);
223 status = decode_fh(xdr, &args->fh);
224out:
Harvey Harrison3110ff82008-05-02 13:42:44 -0700225 dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
Alexey Dobriyan3873bc52006-05-27 03:31:12 +0400226 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227}
228
Benny Halevy4aece6a2009-04-01 09:23:26 -0400229#if defined(CONFIG_NFS_V4_1)
230
Fred Isamanf2a62562011-01-06 11:36:29 +0000231static __be32 decode_layoutrecall_args(struct svc_rqst *rqstp,
232 struct xdr_stream *xdr,
233 struct cb_layoutrecallargs *args)
234{
235 __be32 *p;
236 __be32 status = 0;
237 uint32_t iomode;
238
239 args->cbl_addr = svc_addr(rqstp);
240 p = read_buf(xdr, 4 * sizeof(uint32_t));
241 if (unlikely(p == NULL)) {
242 status = htonl(NFS4ERR_BADXDR);
243 goto out;
244 }
245
246 args->cbl_layout_type = ntohl(*p++);
247 /* Depite the spec's xdr, iomode really belongs in the FILE switch,
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300248 * as it is unusable and ignored with the other types.
Fred Isamanf2a62562011-01-06 11:36:29 +0000249 */
250 iomode = ntohl(*p++);
251 args->cbl_layoutchanged = ntohl(*p++);
252 args->cbl_recall_type = ntohl(*p++);
253
254 if (args->cbl_recall_type == RETURN_FILE) {
255 args->cbl_range.iomode = iomode;
256 status = decode_fh(xdr, &args->cbl_fh);
257 if (unlikely(status != 0))
258 goto out;
259
260 p = read_buf(xdr, 2 * sizeof(uint64_t));
261 if (unlikely(p == NULL)) {
262 status = htonl(NFS4ERR_BADXDR);
263 goto out;
264 }
265 p = xdr_decode_hyper(p, &args->cbl_range.offset);
266 p = xdr_decode_hyper(p, &args->cbl_range.length);
267 status = decode_stateid(xdr, &args->cbl_stateid);
268 if (unlikely(status != 0))
269 goto out;
270 } else if (args->cbl_recall_type == RETURN_FSID) {
271 p = read_buf(xdr, 2 * sizeof(uint64_t));
272 if (unlikely(p == NULL)) {
273 status = htonl(NFS4ERR_BADXDR);
274 goto out;
275 }
276 p = xdr_decode_hyper(p, &args->cbl_fsid.major);
277 p = xdr_decode_hyper(p, &args->cbl_fsid.minor);
278 } else if (args->cbl_recall_type != RETURN_ALL) {
279 status = htonl(NFS4ERR_BADXDR);
280 goto out;
281 }
282 dprintk("%s: ltype 0x%x iomode %d changed %d recall_type %d\n",
283 __func__,
284 args->cbl_layout_type, iomode,
285 args->cbl_layoutchanged, args->cbl_recall_type);
286out:
287 dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
288 return status;
289}
290
Marc Eshel1be56832011-05-22 19:47:09 +0300291static
292__be32 decode_devicenotify_args(struct svc_rqst *rqstp,
293 struct xdr_stream *xdr,
294 struct cb_devicenotifyargs *args)
295{
296 __be32 *p;
297 __be32 status = 0;
298 u32 tmp;
299 int n, i;
300 args->ndevs = 0;
301
302 /* Num of device notifications */
303 p = read_buf(xdr, sizeof(uint32_t));
304 if (unlikely(p == NULL)) {
305 status = htonl(NFS4ERR_BADXDR);
306 goto out;
307 }
308 n = ntohl(*p++);
309 if (n <= 0)
310 goto out;
Dan Carpenter363e0df02012-01-12 10:16:14 +0300311 if (n > ULONG_MAX / sizeof(*args->devs)) {
312 status = htonl(NFS4ERR_BADXDR);
313 goto out;
314 }
Marc Eshel1be56832011-05-22 19:47:09 +0300315
316 args->devs = kmalloc(n * sizeof(*args->devs), GFP_KERNEL);
317 if (!args->devs) {
318 status = htonl(NFS4ERR_DELAY);
319 goto out;
320 }
321
322 /* Decode each dev notification */
323 for (i = 0; i < n; i++) {
324 struct cb_devicenotifyitem *dev = &args->devs[i];
325
326 p = read_buf(xdr, (4 * sizeof(uint32_t)) + NFS4_DEVICEID4_SIZE);
327 if (unlikely(p == NULL)) {
328 status = htonl(NFS4ERR_BADXDR);
329 goto err;
330 }
331
332 tmp = ntohl(*p++); /* bitmap size */
333 if (tmp != 1) {
334 status = htonl(NFS4ERR_INVAL);
335 goto err;
336 }
337 dev->cbd_notify_type = ntohl(*p++);
338 if (dev->cbd_notify_type != NOTIFY_DEVICEID4_CHANGE &&
339 dev->cbd_notify_type != NOTIFY_DEVICEID4_DELETE) {
340 status = htonl(NFS4ERR_INVAL);
341 goto err;
342 }
343
344 tmp = ntohl(*p++); /* opaque size */
345 if (((dev->cbd_notify_type == NOTIFY_DEVICEID4_CHANGE) &&
346 (tmp != NFS4_DEVICEID4_SIZE + 8)) ||
347 ((dev->cbd_notify_type == NOTIFY_DEVICEID4_DELETE) &&
348 (tmp != NFS4_DEVICEID4_SIZE + 4))) {
349 status = htonl(NFS4ERR_INVAL);
350 goto err;
351 }
352 dev->cbd_layout_type = ntohl(*p++);
353 memcpy(dev->cbd_dev_id.data, p, NFS4_DEVICEID4_SIZE);
354 p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE);
355
356 if (dev->cbd_layout_type == NOTIFY_DEVICEID4_CHANGE) {
357 p = read_buf(xdr, sizeof(uint32_t));
358 if (unlikely(p == NULL)) {
359 status = htonl(NFS4ERR_BADXDR);
360 goto err;
361 }
362 dev->cbd_immediate = ntohl(*p++);
363 } else {
364 dev->cbd_immediate = 0;
365 }
366
367 args->ndevs++;
368
369 dprintk("%s: type %d layout 0x%x immediate %d\n",
370 __func__, dev->cbd_notify_type, dev->cbd_layout_type,
371 dev->cbd_immediate);
372 }
373out:
374 dprintk("%s: status %d ndevs %d\n",
375 __func__, ntohl(status), args->ndevs);
376 return status;
377err:
378 kfree(args->devs);
379 goto out;
380}
381
Andy Adamson9733f0d2010-01-22 12:03:08 -0500382static __be32 decode_sessionid(struct xdr_stream *xdr,
Benny Halevy4aece6a2009-04-01 09:23:26 -0400383 struct nfs4_sessionid *sid)
384{
Andy Adamson9733f0d2010-01-22 12:03:08 -0500385 __be32 *p;
Benny Halevy4aece6a2009-04-01 09:23:26 -0400386 int len = NFS4_MAX_SESSIONID_LEN;
387
388 p = read_buf(xdr, len);
389 if (unlikely(p == NULL))
Joe Perchesa419aef2009-08-18 11:18:35 -0700390 return htonl(NFS4ERR_RESOURCE);
Benny Halevy4aece6a2009-04-01 09:23:26 -0400391
392 memcpy(sid->data, p, len);
393 return 0;
394}
395
Andy Adamson9733f0d2010-01-22 12:03:08 -0500396static __be32 decode_rc_list(struct xdr_stream *xdr,
Benny Halevy4aece6a2009-04-01 09:23:26 -0400397 struct referring_call_list *rc_list)
398{
Andy Adamson9733f0d2010-01-22 12:03:08 -0500399 __be32 *p;
Benny Halevy4aece6a2009-04-01 09:23:26 -0400400 int i;
Andy Adamson9733f0d2010-01-22 12:03:08 -0500401 __be32 status;
Benny Halevy4aece6a2009-04-01 09:23:26 -0400402
403 status = decode_sessionid(xdr, &rc_list->rcl_sessionid);
404 if (status)
405 goto out;
406
407 status = htonl(NFS4ERR_RESOURCE);
408 p = read_buf(xdr, sizeof(uint32_t));
409 if (unlikely(p == NULL))
410 goto out;
411
412 rc_list->rcl_nrefcalls = ntohl(*p++);
413 if (rc_list->rcl_nrefcalls) {
414 p = read_buf(xdr,
415 rc_list->rcl_nrefcalls * 2 * sizeof(uint32_t));
416 if (unlikely(p == NULL))
417 goto out;
418 rc_list->rcl_refcalls = kmalloc(rc_list->rcl_nrefcalls *
419 sizeof(*rc_list->rcl_refcalls),
420 GFP_KERNEL);
421 if (unlikely(rc_list->rcl_refcalls == NULL))
422 goto out;
423 for (i = 0; i < rc_list->rcl_nrefcalls; i++) {
424 rc_list->rcl_refcalls[i].rc_sequenceid = ntohl(*p++);
425 rc_list->rcl_refcalls[i].rc_slotid = ntohl(*p++);
426 }
427 }
428 status = 0;
429
430out:
431 return status;
432}
433
Andy Adamson9733f0d2010-01-22 12:03:08 -0500434static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp,
Benny Halevy4aece6a2009-04-01 09:23:26 -0400435 struct xdr_stream *xdr,
436 struct cb_sequenceargs *args)
437{
Andy Adamson9733f0d2010-01-22 12:03:08 -0500438 __be32 *p;
Benny Halevy4aece6a2009-04-01 09:23:26 -0400439 int i;
Andy Adamson9733f0d2010-01-22 12:03:08 -0500440 __be32 status;
Benny Halevy4aece6a2009-04-01 09:23:26 -0400441
442 status = decode_sessionid(xdr, &args->csa_sessionid);
443 if (status)
444 goto out;
445
446 status = htonl(NFS4ERR_RESOURCE);
447 p = read_buf(xdr, 5 * sizeof(uint32_t));
448 if (unlikely(p == NULL))
449 goto out;
450
Ricardo Labiaga65fc64e2009-04-01 09:23:30 -0400451 args->csa_addr = svc_addr(rqstp);
Benny Halevy4aece6a2009-04-01 09:23:26 -0400452 args->csa_sequenceid = ntohl(*p++);
453 args->csa_slotid = ntohl(*p++);
454 args->csa_highestslotid = ntohl(*p++);
455 args->csa_cachethis = ntohl(*p++);
456 args->csa_nrclists = ntohl(*p++);
457 args->csa_rclists = NULL;
458 if (args->csa_nrclists) {
Dan Carpenter0439f312012-06-12 10:37:08 +0300459 args->csa_rclists = kmalloc_array(args->csa_nrclists,
460 sizeof(*args->csa_rclists),
461 GFP_KERNEL);
Benny Halevy4aece6a2009-04-01 09:23:26 -0400462 if (unlikely(args->csa_rclists == NULL))
463 goto out;
464
465 for (i = 0; i < args->csa_nrclists; i++) {
466 status = decode_rc_list(xdr, &args->csa_rclists[i]);
467 if (status)
468 goto out_free;
469 }
470 }
471 status = 0;
472
473 dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u slotid %u "
474 "highestslotid %u cachethis %d nrclists %u\n",
475 __func__,
476 ((u32 *)&args->csa_sessionid)[0],
477 ((u32 *)&args->csa_sessionid)[1],
478 ((u32 *)&args->csa_sessionid)[2],
479 ((u32 *)&args->csa_sessionid)[3],
480 args->csa_sequenceid, args->csa_slotid,
481 args->csa_highestslotid, args->csa_cachethis,
482 args->csa_nrclists);
483out:
484 dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
485 return status;
486
487out_free:
488 for (i = 0; i < args->csa_nrclists; i++)
489 kfree(args->csa_rclists[i].rcl_refcalls);
490 kfree(args->csa_rclists);
491 goto out;
492}
493
Andy Adamson9733f0d2010-01-22 12:03:08 -0500494static __be32 decode_recallany_args(struct svc_rqst *rqstp,
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500495 struct xdr_stream *xdr,
496 struct cb_recallanyargs *args)
497{
Peng Taod743c3c2011-10-23 20:22:38 -0700498 uint32_t bitmap[2];
499 __be32 *p, status;
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500500
501 args->craa_addr = svc_addr(rqstp);
502 p = read_buf(xdr, 4);
503 if (unlikely(p == NULL))
504 return htonl(NFS4ERR_BADXDR);
505 args->craa_objs_to_keep = ntohl(*p++);
Peng Taod743c3c2011-10-23 20:22:38 -0700506 status = decode_bitmap(xdr, bitmap);
507 if (unlikely(status))
508 return status;
509 args->craa_type_mask = bitmap[0];
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500510
511 return 0;
512}
513
Andy Adamson9733f0d2010-01-22 12:03:08 -0500514static __be32 decode_recallslot_args(struct svc_rqst *rqstp,
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500515 struct xdr_stream *xdr,
516 struct cb_recallslotargs *args)
517{
518 __be32 *p;
519
520 args->crsa_addr = svc_addr(rqstp);
521 p = read_buf(xdr, 4);
522 if (unlikely(p == NULL))
523 return htonl(NFS4ERR_BADXDR);
Trond Myklebustd5fb4ce2012-11-20 20:24:02 -0500524 args->crsa_target_highest_slotid = ntohl(*p++);
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500525 return 0;
526}
527
Benny Halevy4aece6a2009-04-01 09:23:26 -0400528#endif /* CONFIG_NFS_V4_1 */
529
Al Viroe6f684f2006-10-19 23:28:50 -0700530static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531{
Al Viro5704fde2006-10-19 23:28:51 -0700532 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533
534 p = xdr_reserve_space(xdr, 4 + len);
535 if (unlikely(p == NULL))
536 return htonl(NFS4ERR_RESOURCE);
537 xdr_encode_opaque(p, str, len);
538 return 0;
539}
540
541#define CB_SUPPORTED_ATTR0 (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE)
542#define CB_SUPPORTED_ATTR1 (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY)
Al Viro5704fde2006-10-19 23:28:51 -0700543static __be32 encode_attr_bitmap(struct xdr_stream *xdr, const uint32_t *bitmap, __be32 **savep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544{
Al Viro5704fde2006-10-19 23:28:51 -0700545 __be32 bm[2];
546 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547
548 bm[0] = htonl(bitmap[0] & CB_SUPPORTED_ATTR0);
549 bm[1] = htonl(bitmap[1] & CB_SUPPORTED_ATTR1);
550 if (bm[1] != 0) {
551 p = xdr_reserve_space(xdr, 16);
552 if (unlikely(p == NULL))
553 return htonl(NFS4ERR_RESOURCE);
554 *p++ = htonl(2);
555 *p++ = bm[0];
556 *p++ = bm[1];
557 } else if (bm[0] != 0) {
558 p = xdr_reserve_space(xdr, 12);
559 if (unlikely(p == NULL))
560 return htonl(NFS4ERR_RESOURCE);
561 *p++ = htonl(1);
562 *p++ = bm[0];
563 } else {
564 p = xdr_reserve_space(xdr, 8);
565 if (unlikely(p == NULL))
566 return htonl(NFS4ERR_RESOURCE);
567 *p++ = htonl(0);
568 }
569 *savep = p;
570 return 0;
571}
572
Al Viroe6f684f2006-10-19 23:28:50 -0700573static __be32 encode_attr_change(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t change)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574{
Al Viro5704fde2006-10-19 23:28:51 -0700575 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576
577 if (!(bitmap[0] & FATTR4_WORD0_CHANGE))
578 return 0;
579 p = xdr_reserve_space(xdr, 8);
Harvey Harrison90dc7d22008-02-20 13:03:05 -0800580 if (unlikely(!p))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 return htonl(NFS4ERR_RESOURCE);
582 p = xdr_encode_hyper(p, change);
583 return 0;
584}
585
Al Viroe6f684f2006-10-19 23:28:50 -0700586static __be32 encode_attr_size(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587{
Al Viro5704fde2006-10-19 23:28:51 -0700588 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589
590 if (!(bitmap[0] & FATTR4_WORD0_SIZE))
591 return 0;
592 p = xdr_reserve_space(xdr, 8);
Harvey Harrison90dc7d22008-02-20 13:03:05 -0800593 if (unlikely(!p))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 return htonl(NFS4ERR_RESOURCE);
595 p = xdr_encode_hyper(p, size);
596 return 0;
597}
598
Al Viroe6f684f2006-10-19 23:28:50 -0700599static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec *time)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600{
Al Viro5704fde2006-10-19 23:28:51 -0700601 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602
603 p = xdr_reserve_space(xdr, 12);
Harvey Harrison90dc7d22008-02-20 13:03:05 -0800604 if (unlikely(!p))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 return htonl(NFS4ERR_RESOURCE);
606 p = xdr_encode_hyper(p, time->tv_sec);
607 *p = htonl(time->tv_nsec);
608 return 0;
609}
610
Al Viroe6f684f2006-10-19 23:28:50 -0700611static __be32 encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612{
613 if (!(bitmap[1] & FATTR4_WORD1_TIME_METADATA))
614 return 0;
615 return encode_attr_time(xdr,time);
616}
617
Al Viroe6f684f2006-10-19 23:28:50 -0700618static __be32 encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619{
620 if (!(bitmap[1] & FATTR4_WORD1_TIME_MODIFY))
621 return 0;
622 return encode_attr_time(xdr,time);
623}
624
Al Viroe6f684f2006-10-19 23:28:50 -0700625static __be32 encode_compound_hdr_res(struct xdr_stream *xdr, struct cb_compound_hdr_res *hdr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626{
Al Viroe6f684f2006-10-19 23:28:50 -0700627 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628
629 hdr->status = xdr_reserve_space(xdr, 4);
630 if (unlikely(hdr->status == NULL))
631 return htonl(NFS4ERR_RESOURCE);
632 status = encode_string(xdr, hdr->taglen, hdr->tag);
633 if (unlikely(status != 0))
634 return status;
635 hdr->nops = xdr_reserve_space(xdr, 4);
636 if (unlikely(hdr->nops == NULL))
637 return htonl(NFS4ERR_RESOURCE);
638 return 0;
639}
640
Al Viroe6f684f2006-10-19 23:28:50 -0700641static __be32 encode_op_hdr(struct xdr_stream *xdr, uint32_t op, __be32 res)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642{
Al Viro5704fde2006-10-19 23:28:51 -0700643 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644
645 p = xdr_reserve_space(xdr, 8);
646 if (unlikely(p == NULL))
Andy Adamson31d2b432010-01-14 17:45:04 -0500647 return htonl(NFS4ERR_RESOURCE_HDR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 *p++ = htonl(op);
649 *p = res;
650 return 0;
651}
652
Al Viroe6f684f2006-10-19 23:28:50 -0700653static __be32 encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr, const struct cb_getattrres *res)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654{
Al Viro5704fde2006-10-19 23:28:51 -0700655 __be32 *savep = NULL;
Al Viroe6f684f2006-10-19 23:28:50 -0700656 __be32 status = res->status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657
658 if (unlikely(status != 0))
659 goto out;
660 status = encode_attr_bitmap(xdr, res->bitmap, &savep);
661 if (unlikely(status != 0))
662 goto out;
663 status = encode_attr_change(xdr, res->bitmap, res->change_attr);
664 if (unlikely(status != 0))
665 goto out;
666 status = encode_attr_size(xdr, res->bitmap, res->size);
667 if (unlikely(status != 0))
668 goto out;
669 status = encode_attr_ctime(xdr, res->bitmap, &res->ctime);
670 if (unlikely(status != 0))
671 goto out;
672 status = encode_attr_mtime(xdr, res->bitmap, &res->mtime);
673 *savep = htonl((unsigned int)((char *)xdr->p - (char *)(savep+1)));
674out:
Harvey Harrison3110ff82008-05-02 13:42:44 -0700675 dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 return status;
677}
678
Benny Halevy34bc47c92009-04-01 09:23:22 -0400679#if defined(CONFIG_NFS_V4_1)
680
Andy Adamson9733f0d2010-01-22 12:03:08 -0500681static __be32 encode_sessionid(struct xdr_stream *xdr,
Benny Halevy4aece6a2009-04-01 09:23:26 -0400682 const struct nfs4_sessionid *sid)
683{
Andy Adamson9733f0d2010-01-22 12:03:08 -0500684 __be32 *p;
Benny Halevy4aece6a2009-04-01 09:23:26 -0400685 int len = NFS4_MAX_SESSIONID_LEN;
686
687 p = xdr_reserve_space(xdr, len);
688 if (unlikely(p == NULL))
689 return htonl(NFS4ERR_RESOURCE);
690
691 memcpy(p, sid, len);
692 return 0;
693}
694
Andy Adamson9733f0d2010-01-22 12:03:08 -0500695static __be32 encode_cb_sequence_res(struct svc_rqst *rqstp,
Benny Halevy4aece6a2009-04-01 09:23:26 -0400696 struct xdr_stream *xdr,
697 const struct cb_sequenceres *res)
698{
Andy Adamson9733f0d2010-01-22 12:03:08 -0500699 __be32 *p;
Dan Carpentere216c8c2012-06-12 10:37:39 +0300700 __be32 status = res->csr_status;
Benny Halevy4aece6a2009-04-01 09:23:26 -0400701
702 if (unlikely(status != 0))
703 goto out;
704
705 encode_sessionid(xdr, &res->csr_sessionid);
706
707 p = xdr_reserve_space(xdr, 4 * sizeof(uint32_t));
708 if (unlikely(p == NULL))
709 return htonl(NFS4ERR_RESOURCE);
710
711 *p++ = htonl(res->csr_sequenceid);
712 *p++ = htonl(res->csr_slotid);
713 *p++ = htonl(res->csr_highestslotid);
714 *p++ = htonl(res->csr_target_highestslotid);
715out:
716 dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
717 return status;
718}
719
Benny Halevy34bc47c92009-04-01 09:23:22 -0400720static __be32
721preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op)
722{
Benny Halevy281fe152009-04-01 09:23:27 -0400723 if (op_nr == OP_CB_SEQUENCE) {
724 if (nop != 0)
725 return htonl(NFS4ERR_SEQUENCE_POS);
726 } else {
727 if (nop == 0)
728 return htonl(NFS4ERR_OP_NOT_IN_SESSION);
729 }
730
Benny Halevy34bc47c92009-04-01 09:23:22 -0400731 switch (op_nr) {
732 case OP_CB_GETATTR:
733 case OP_CB_RECALL:
Benny Halevy4aece6a2009-04-01 09:23:26 -0400734 case OP_CB_SEQUENCE:
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500735 case OP_CB_RECALL_ANY:
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500736 case OP_CB_RECALL_SLOT:
Fred Isamanf2a62562011-01-06 11:36:29 +0000737 case OP_CB_LAYOUTRECALL:
Marc Eshel1be56832011-05-22 19:47:09 +0300738 case OP_CB_NOTIFY_DEVICEID:
Benny Halevy34bc47c92009-04-01 09:23:22 -0400739 *op = &callback_ops[op_nr];
740 break;
741
Benny Halevy34bc47c92009-04-01 09:23:22 -0400742 case OP_CB_NOTIFY:
743 case OP_CB_PUSH_DELEG:
Benny Halevy34bc47c92009-04-01 09:23:22 -0400744 case OP_CB_RECALLABLE_OBJ_AVAIL:
Benny Halevy34bc47c92009-04-01 09:23:22 -0400745 case OP_CB_WANTS_CANCELLED:
746 case OP_CB_NOTIFY_LOCK:
747 return htonl(NFS4ERR_NOTSUPP);
748
749 default:
750 return htonl(NFS4ERR_OP_ILLEGAL);
751 }
752
753 return htonl(NFS_OK);
754}
755
Andy Adamson42acd022011-01-06 02:04:34 +0000756static void nfs4_callback_free_slot(struct nfs4_session *session)
757{
758 struct nfs4_slot_table *tbl = &session->bc_slot_table;
759
760 spin_lock(&tbl->slot_tbl_lock);
761 /*
762 * Let the state manager know callback processing done.
763 * A single slot, so highest used slotid is either 0 or -1
764 */
Trond Myklebust45d43c22012-02-06 19:38:51 -0500765 tbl->highest_used_slotid = NFS4_NO_SLOT;
Trond Myklebust5d633602012-11-23 13:09:38 -0500766 nfs4_session_drain_complete(session, tbl);
Andy Adamson42acd022011-01-06 02:04:34 +0000767 spin_unlock(&tbl->slot_tbl_lock);
768}
769
Trond Myklebust55a67392011-08-02 14:46:29 -0400770static void nfs4_cb_free_slot(struct cb_process_state *cps)
Andy Adamson42acd022011-01-06 02:04:34 +0000771{
Trond Myklebust45d43c22012-02-06 19:38:51 -0500772 if (cps->slotid != NFS4_NO_SLOT)
Trond Myklebust55a67392011-08-02 14:46:29 -0400773 nfs4_callback_free_slot(cps->clp->cl_session);
Andy Adamson42acd022011-01-06 02:04:34 +0000774}
775
Benny Halevy34bc47c92009-04-01 09:23:22 -0400776#else /* CONFIG_NFS_V4_1 */
777
778static __be32
779preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op)
780{
781 return htonl(NFS4ERR_MINOR_VERS_MISMATCH);
782}
783
Trond Myklebust55a67392011-08-02 14:46:29 -0400784static void nfs4_cb_free_slot(struct cb_process_state *cps)
Andy Adamson42acd022011-01-06 02:04:34 +0000785{
786}
Benny Halevy34bc47c92009-04-01 09:23:22 -0400787#endif /* CONFIG_NFS_V4_1 */
788
789static __be32
790preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op)
791{
792 switch (op_nr) {
793 case OP_CB_GETATTR:
794 case OP_CB_RECALL:
795 *op = &callback_ops[op_nr];
796 break;
797 default:
798 return htonl(NFS4ERR_OP_ILLEGAL);
799 }
800
801 return htonl(NFS_OK);
802}
803
804static __be32 process_op(uint32_t minorversion, int nop,
805 struct svc_rqst *rqstp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 struct xdr_stream *xdr_in, void *argp,
Andy Adamsonc36fca52011-01-06 02:04:32 +0000807 struct xdr_stream *xdr_out, void *resp,
808 struct cb_process_state *cps)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809{
Trond Myklebusta162a6b2006-03-20 13:44:10 -0500810 struct callback_op *op = &callback_ops[0];
Andy Adamson31d2b432010-01-14 17:45:04 -0500811 unsigned int op_nr;
Benny Halevy34bc47c92009-04-01 09:23:22 -0400812 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813 long maxlen;
Al Viroe6f684f2006-10-19 23:28:50 -0700814 __be32 res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815
Harvey Harrison3110ff82008-05-02 13:42:44 -0700816 dprintk("%s: start\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 status = decode_op_hdr(xdr_in, &op_nr);
Andy Adamson31d2b432010-01-14 17:45:04 -0500818 if (unlikely(status))
819 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820
Benny Halevy34bc47c92009-04-01 09:23:22 -0400821 dprintk("%s: minorversion=%d nop=%d op_nr=%u\n",
822 __func__, minorversion, nop, op_nr);
823
824 status = minorversion ? preprocess_nfs41_op(nop, op_nr, &op) :
825 preprocess_nfs4_op(op_nr, &op);
826 if (status == htonl(NFS4ERR_OP_ILLEGAL))
827 op_nr = OP_CB_ILLEGAL;
Andy Adamsonb92b3012010-01-14 17:45:05 -0500828 if (status)
829 goto encode_hdr;
Andy Adamson31d2b432010-01-14 17:45:04 -0500830
Andy Adamsonc36fca52011-01-06 02:04:32 +0000831 if (cps->drc_status) {
832 status = cps->drc_status;
Andy Adamson49110962010-01-14 17:45:08 -0500833 goto encode_hdr;
834 }
835
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 maxlen = xdr_out->end - xdr_out->p;
837 if (maxlen > 0 && maxlen < PAGE_SIZE) {
Andy Adamsone95e60d2010-01-14 17:45:06 -0500838 status = op->decode_args(rqstp, xdr_in, argp);
839 if (likely(status == 0))
Andy Adamsonc36fca52011-01-06 02:04:32 +0000840 status = op->process_op(argp, resp, cps);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 } else
842 status = htonl(NFS4ERR_RESOURCE);
843
Andy Adamsonb92b3012010-01-14 17:45:05 -0500844encode_hdr:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 res = encode_op_hdr(xdr_out, op_nr, status);
Andy Adamson31d2b432010-01-14 17:45:04 -0500846 if (unlikely(res))
847 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 if (op->encode_res != NULL && status == 0)
849 status = op->encode_res(rqstp, xdr_out, resp);
Harvey Harrison3110ff82008-05-02 13:42:44 -0700850 dprintk("%s: done, status = %d\n", __func__, ntohl(status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851 return status;
852}
853
854/*
855 * Decode, process and encode a COMPOUND
856 */
Al Viro7111c662006-10-19 23:28:45 -0700857static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *resp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858{
Trond Myklebust3a6258e2008-05-06 13:32:40 -0400859 struct cb_compound_hdr_arg hdr_arg = { 0 };
860 struct cb_compound_hdr_res hdr_res = { NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 struct xdr_stream xdr_in, xdr_out;
Andy Adamsonc36fca52011-01-06 02:04:32 +0000862 __be32 *p, status;
863 struct cb_process_state cps = {
864 .drc_status = 0,
865 .clp = NULL,
Trond Myklebust45d43c22012-02-06 19:38:51 -0500866 .slotid = NFS4_NO_SLOT,
Stanislav Kinsbursky9695c702012-07-25 16:57:06 +0400867 .net = SVC_NET(rqstp),
Andy Adamsonc36fca52011-01-06 02:04:32 +0000868 };
Trond Myklebust3a6258e2008-05-06 13:32:40 -0400869 unsigned int nops = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870
Harvey Harrison3110ff82008-05-02 13:42:44 -0700871 dprintk("%s: start\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872
873 xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base);
874
Al Viro5704fde2006-10-19 23:28:51 -0700875 p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876 xdr_init_encode(&xdr_out, &rqstp->rq_res, p);
877
Trond Myklebust3a6258e2008-05-06 13:32:40 -0400878 status = decode_compound_hdr_arg(&xdr_in, &hdr_arg);
879 if (status == __constant_htonl(NFS4ERR_RESOURCE))
880 return rpc_garbage_args;
881
Andy Adamsonc36fca52011-01-06 02:04:32 +0000882 if (hdr_arg.minorversion == 0) {
Stanislav Kinsbursky9695c702012-07-25 16:57:06 +0400883 cps.clp = nfs4_find_client_ident(SVC_NET(rqstp), hdr_arg.cb_ident);
Andy Adamson778be232011-01-25 15:38:01 +0000884 if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp))
Andy Adamsonc36fca52011-01-06 02:04:32 +0000885 return rpc_drop_reply;
Andy Adamson778be232011-01-25 15:38:01 +0000886 }
Andy Adamsonc36fca52011-01-06 02:04:32 +0000887
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 hdr_res.taglen = hdr_arg.taglen;
889 hdr_res.tag = hdr_arg.tag;
Trond Myklebust3a6258e2008-05-06 13:32:40 -0400890 if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0)
891 return rpc_system_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892
Trond Myklebust3a6258e2008-05-06 13:32:40 -0400893 while (status == 0 && nops != hdr_arg.nops) {
Andy Adamson49110962010-01-14 17:45:08 -0500894 status = process_op(hdr_arg.minorversion, nops, rqstp,
Andy Adamsonc36fca52011-01-06 02:04:32 +0000895 &xdr_in, argp, &xdr_out, resp, &cps);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 nops++;
897 }
Trond Myklebust3a6258e2008-05-06 13:32:40 -0400898
Andy Adamson31d2b432010-01-14 17:45:04 -0500899 /* Buffer overflow in decode_ops_hdr or encode_ops_hdr. Return
900 * resource error in cb_compound status without returning op */
901 if (unlikely(status == htonl(NFS4ERR_RESOURCE_HDR))) {
902 status = htonl(NFS4ERR_RESOURCE);
903 nops--;
904 }
905
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 *hdr_res.status = status;
907 *hdr_res.nops = htonl(nops);
Trond Myklebust55a67392011-08-02 14:46:29 -0400908 nfs4_cb_free_slot(&cps);
Andy Adamsonc36fca52011-01-06 02:04:32 +0000909 nfs_put_client(cps.clp);
Harvey Harrison3110ff82008-05-02 13:42:44 -0700910 dprintk("%s: done, status = %u\n", __func__, ntohl(status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 return rpc_success;
912}
913
914/*
915 * Define NFS4 callback COMPOUND ops.
916 */
917static struct callback_op callback_ops[] = {
918 [0] = {
919 .res_maxsize = CB_OP_HDR_RES_MAXSZ,
920 },
921 [OP_CB_GETATTR] = {
922 .process_op = (callback_process_op_t)nfs4_callback_getattr,
923 .decode_args = (callback_decode_arg_t)decode_getattr_args,
924 .encode_res = (callback_encode_res_t)encode_getattr_res,
925 .res_maxsize = CB_OP_GETATTR_RES_MAXSZ,
926 },
927 [OP_CB_RECALL] = {
928 .process_op = (callback_process_op_t)nfs4_callback_recall,
929 .decode_args = (callback_decode_arg_t)decode_recall_args,
930 .res_maxsize = CB_OP_RECALL_RES_MAXSZ,
Benny Halevy4aece6a2009-04-01 09:23:26 -0400931 },
932#if defined(CONFIG_NFS_V4_1)
Fred Isamanf2a62562011-01-06 11:36:29 +0000933 [OP_CB_LAYOUTRECALL] = {
934 .process_op = (callback_process_op_t)nfs4_callback_layoutrecall,
935 .decode_args =
936 (callback_decode_arg_t)decode_layoutrecall_args,
937 .res_maxsize = CB_OP_LAYOUTRECALL_RES_MAXSZ,
938 },
Marc Eshel1be56832011-05-22 19:47:09 +0300939 [OP_CB_NOTIFY_DEVICEID] = {
940 .process_op = (callback_process_op_t)nfs4_callback_devicenotify,
941 .decode_args =
942 (callback_decode_arg_t)decode_devicenotify_args,
943 .res_maxsize = CB_OP_DEVICENOTIFY_RES_MAXSZ,
944 },
Benny Halevy4aece6a2009-04-01 09:23:26 -0400945 [OP_CB_SEQUENCE] = {
946 .process_op = (callback_process_op_t)nfs4_callback_sequence,
947 .decode_args = (callback_decode_arg_t)decode_cb_sequence_args,
948 .encode_res = (callback_encode_res_t)encode_cb_sequence_res,
949 .res_maxsize = CB_OP_SEQUENCE_RES_MAXSZ,
950 },
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500951 [OP_CB_RECALL_ANY] = {
952 .process_op = (callback_process_op_t)nfs4_callback_recallany,
953 .decode_args = (callback_decode_arg_t)decode_recallany_args,
954 .res_maxsize = CB_OP_RECALLANY_RES_MAXSZ,
955 },
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500956 [OP_CB_RECALL_SLOT] = {
957 .process_op = (callback_process_op_t)nfs4_callback_recallslot,
958 .decode_args = (callback_decode_arg_t)decode_recallslot_args,
959 .res_maxsize = CB_OP_RECALLSLOT_RES_MAXSZ,
960 },
Benny Halevy4aece6a2009-04-01 09:23:26 -0400961#endif /* CONFIG_NFS_V4_1 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962};
963
964/*
965 * Define NFS4 callback procedures
966 */
967static struct svc_procedure nfs4_callback_procedures1[] = {
968 [CB_NULL] = {
969 .pc_func = nfs4_callback_null,
970 .pc_decode = (kxdrproc_t)nfs4_decode_void,
971 .pc_encode = (kxdrproc_t)nfs4_encode_void,
972 .pc_xdrressize = 1,
973 },
974 [CB_COMPOUND] = {
975 .pc_func = nfs4_callback_compound,
976 .pc_encode = (kxdrproc_t)nfs4_encode_void,
977 .pc_argsize = 256,
978 .pc_ressize = 256,
979 .pc_xdrressize = NFS4_CALLBACK_BUFSIZE,
980 }
981};
982
983struct svc_version nfs4_callback_version1 = {
984 .vs_vers = 1,
985 .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1),
986 .vs_proc = nfs4_callback_procedures1,
987 .vs_xdrsize = NFS4_CALLBACK_XDRSIZE,
988 .vs_dispatch = NULL,
Steve Dickson49697ee2009-10-13 16:07:33 -0400989 .vs_hidden = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990};
991
Alexandros Batsakis07bccc22009-12-05 13:19:01 -0500992struct svc_version nfs4_callback_version4 = {
993 .vs_vers = 4,
994 .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1),
995 .vs_proc = nfs4_callback_procedures1,
996 .vs_xdrsize = NFS4_CALLBACK_XDRSIZE,
997 .vs_dispatch = NULL,
Jeff Layton60702952011-11-04 07:04:10 -0400998 .vs_hidden = 1,
Alexandros Batsakis07bccc22009-12-05 13:19:01 -0500999};