Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * linux/fs/nfs/callback_xdr.c | |
4 | * | |
5 | * Copyright (C) 2004 Trond Myklebust | |
6 | * | |
7 | * NFSv4 callback encode/decode procedures | |
8 | */ | |
1da177e4 LT |
9 | #include <linux/kernel.h> |
10 | #include <linux/sunrpc/svc.h> | |
11 | #include <linux/nfs4.h> | |
12 | #include <linux/nfs_fs.h> | |
9a3ba432 TM |
13 | #include <linux/ratelimit.h> |
14 | #include <linux/printk.h> | |
5a0e3ad6 | 15 | #include <linux/slab.h> |
c36fca52 | 16 | #include <linux/sunrpc/bc_xprt.h> |
4ce79717 | 17 | #include "nfs4_fs.h" |
1da177e4 | 18 | #include "callback.h" |
c36fca52 | 19 | #include "internal.h" |
76e697ba | 20 | #include "nfs4session.h" |
1da177e4 | 21 | |
45724e8a KM |
22 | #define CB_OP_TAGLEN_MAXSZ (512) |
23 | #define CB_OP_HDR_RES_MAXSZ (2 * 4) // opcode, status | |
24 | #define CB_OP_GETATTR_BITMAP_MAXSZ (4 * 4) // bitmap length, 3 bitmaps | |
25 | #define CB_OP_GETATTR_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \ | |
26 | CB_OP_GETATTR_BITMAP_MAXSZ + \ | |
27 | /* change, size, ctime, mtime */\ | |
28 | (2 + 2 + 3 + 3) * 4) | |
29 | #define CB_OP_RECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) | |
1da177e4 | 30 | |
4aece6a1 | 31 | #if defined(CONFIG_NFS_V4_1) |
f2a62561 | 32 | #define CB_OP_LAYOUTRECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
1be5683b | 33 | #define CB_OP_DEVICENOTIFY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
4aece6a1 | 34 | #define CB_OP_SEQUENCE_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \ |
45724e8a KM |
35 | NFS4_MAX_SESSIONID_LEN + \ |
36 | (1 + 3) * 4) // seqid, 3 slotids | |
31f09607 | 37 | #define CB_OP_RECALLANY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
b9efa1b2 | 38 | #define CB_OP_RECALLSLOT_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
db783688 | 39 | #define CB_OP_NOTIFY_LOCK_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
4aece6a1 BH |
40 | #endif /* CONFIG_NFS_V4_1 */ |
41 | ||
1da177e4 LT |
42 | #define NFSDBG_FACILITY NFSDBG_CALLBACK |
43 | ||
31d2b435 AA |
44 | /* Internal error code */ |
45 | #define NFS4ERR_RESOURCE_HDR 11050 | |
46 | ||
1da177e4 | 47 | struct callback_op { |
f4dac4ad CH |
48 | __be32 (*process_op)(void *, void *, struct cb_process_state *); |
49 | __be32 (*decode_args)(struct svc_rqst *, struct xdr_stream *, void *); | |
50 | __be32 (*encode_res)(struct svc_rqst *, struct xdr_stream *, | |
51 | const void *); | |
1da177e4 LT |
52 | long res_maxsize; |
53 | }; | |
54 | ||
55 | static struct callback_op callback_ops[]; | |
56 | ||
a6beb732 | 57 | static __be32 nfs4_callback_null(struct svc_rqst *rqstp) |
1da177e4 LT |
58 | { |
59 | return htonl(NFS4_OK); | |
60 | } | |
61 | ||
026fec7e | 62 | static int nfs4_decode_void(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 LT |
63 | { |
64 | return xdr_argsize_check(rqstp, p); | |
65 | } | |
66 | ||
63f8de37 | 67 | static int nfs4_encode_void(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 LT |
68 | { |
69 | return xdr_ressize_check(rqstp, p); | |
70 | } | |
71 | ||
b60475c9 | 72 | static __be32 *read_buf(struct xdr_stream *xdr, size_t nbytes) |
1da177e4 | 73 | { |
5704fdeb | 74 | __be32 *p; |
1da177e4 LT |
75 | |
76 | p = xdr_inline_decode(xdr, nbytes); | |
77 | if (unlikely(p == NULL)) | |
756b9b37 | 78 | printk(KERN_WARNING "NFS: NFSv4 callback reply buffer overflowed!\n"); |
1da177e4 LT |
79 | return p; |
80 | } | |
81 | ||
c065eeea TM |
82 | static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len, |
83 | const char **str, size_t maxlen) | |
1da177e4 | 84 | { |
c065eeea | 85 | ssize_t err; |
1da177e4 | 86 | |
c065eeea TM |
87 | err = xdr_stream_decode_opaque_inline(xdr, (void **)str, maxlen); |
88 | if (err < 0) | |
89 | return cpu_to_be32(NFS4ERR_RESOURCE); | |
90 | *len = err; | |
1da177e4 LT |
91 | return 0; |
92 | } | |
93 | ||
e6f684f6 | 94 | static __be32 decode_fh(struct xdr_stream *xdr, struct nfs_fh *fh) |
1da177e4 | 95 | { |
5704fdeb | 96 | __be32 *p; |
1da177e4 LT |
97 | |
98 | p = read_buf(xdr, 4); | |
99 | if (unlikely(p == NULL)) | |
100 | return htonl(NFS4ERR_RESOURCE); | |
101 | fh->size = ntohl(*p); | |
102 | if (fh->size > NFS4_FHSIZE) | |
103 | return htonl(NFS4ERR_BADHANDLE); | |
104 | p = read_buf(xdr, fh->size); | |
105 | if (unlikely(p == NULL)) | |
106 | return htonl(NFS4ERR_RESOURCE); | |
107 | memcpy(&fh->data[0], p, fh->size); | |
108 | memset(&fh->data[fh->size], 0, sizeof(fh->data) - fh->size); | |
109 | return 0; | |
110 | } | |
111 | ||
e6f684f6 | 112 | static __be32 decode_bitmap(struct xdr_stream *xdr, uint32_t *bitmap) |
1da177e4 | 113 | { |
5704fdeb | 114 | __be32 *p; |
1da177e4 LT |
115 | unsigned int attrlen; |
116 | ||
117 | p = read_buf(xdr, 4); | |
118 | if (unlikely(p == NULL)) | |
119 | return htonl(NFS4ERR_RESOURCE); | |
120 | attrlen = ntohl(*p); | |
121 | p = read_buf(xdr, attrlen << 2); | |
122 | if (unlikely(p == NULL)) | |
123 | return htonl(NFS4ERR_RESOURCE); | |
124 | if (likely(attrlen > 0)) | |
125 | bitmap[0] = ntohl(*p++); | |
126 | if (attrlen > 1) | |
127 | bitmap[1] = ntohl(*p); | |
128 | return 0; | |
129 | } | |
130 | ||
e6f684f6 | 131 | static __be32 decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) |
1da177e4 | 132 | { |
5704fdeb | 133 | __be32 *p; |
1da177e4 | 134 | |
2d2f24ad | 135 | p = read_buf(xdr, NFS4_STATEID_SIZE); |
1da177e4 LT |
136 | if (unlikely(p == NULL)) |
137 | return htonl(NFS4ERR_RESOURCE); | |
93b717fd | 138 | memcpy(stateid->data, p, NFS4_STATEID_SIZE); |
1da177e4 LT |
139 | return 0; |
140 | } | |
141 | ||
93b717fd TM |
142 | static __be32 decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) |
143 | { | |
144 | stateid->type = NFS4_DELEGATION_STATEID_TYPE; | |
145 | return decode_stateid(xdr, stateid); | |
146 | } | |
147 | ||
e6f684f6 | 148 | static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound_hdr_arg *hdr) |
1da177e4 | 149 | { |
5704fdeb | 150 | __be32 *p; |
e6f684f6 | 151 | __be32 status; |
1da177e4 | 152 | |
c065eeea | 153 | status = decode_string(xdr, &hdr->taglen, &hdr->tag, CB_OP_TAGLEN_MAXSZ); |
1da177e4 LT |
154 | if (unlikely(status != 0)) |
155 | return status; | |
1da177e4 LT |
156 | p = read_buf(xdr, 12); |
157 | if (unlikely(p == NULL)) | |
158 | return htonl(NFS4ERR_RESOURCE); | |
b8f2ef84 | 159 | hdr->minorversion = ntohl(*p++); |
459de2ed BS |
160 | /* Check for minor version support */ |
161 | if (hdr->minorversion <= NFS4_MAX_MINOR_VERSION) { | |
42c2c424 | 162 | hdr->cb_ident = ntohl(*p++); /* ignored by v4.1 and v4.2 */ |
48a9e2d2 | 163 | } else { |
9a3ba432 | 164 | pr_warn_ratelimited("NFS: %s: NFSv4 server callback with " |
b8f2ef84 BH |
165 | "illegal minor version %u!\n", |
166 | __func__, hdr->minorversion); | |
1da177e4 LT |
167 | return htonl(NFS4ERR_MINOR_VERS_MISMATCH); |
168 | } | |
1da177e4 LT |
169 | hdr->nops = ntohl(*p); |
170 | return 0; | |
171 | } | |
172 | ||
e6f684f6 | 173 | static __be32 decode_op_hdr(struct xdr_stream *xdr, unsigned int *op) |
1da177e4 | 174 | { |
5704fdeb | 175 | __be32 *p; |
1da177e4 LT |
176 | p = read_buf(xdr, 4); |
177 | if (unlikely(p == NULL)) | |
31d2b435 | 178 | return htonl(NFS4ERR_RESOURCE_HDR); |
1da177e4 LT |
179 | *op = ntohl(*p); |
180 | return 0; | |
181 | } | |
182 | ||
f4dac4ad CH |
183 | static __be32 decode_getattr_args(struct svc_rqst *rqstp, |
184 | struct xdr_stream *xdr, void *argp) | |
1da177e4 | 185 | { |
f4dac4ad | 186 | struct cb_getattrargs *args = argp; |
e6f684f6 | 187 | __be32 status; |
1da177e4 LT |
188 | |
189 | status = decode_fh(xdr, &args->fh); | |
190 | if (unlikely(status != 0)) | |
56938bb7 AS |
191 | return status; |
192 | return decode_bitmap(xdr, args->bitmap); | |
1da177e4 LT |
193 | } |
194 | ||
f4dac4ad CH |
195 | static __be32 decode_recall_args(struct svc_rqst *rqstp, |
196 | struct xdr_stream *xdr, void *argp) | |
1da177e4 | 197 | { |
f4dac4ad | 198 | struct cb_recallargs *args = argp; |
5704fdeb | 199 | __be32 *p; |
e6f684f6 | 200 | __be32 status; |
1da177e4 | 201 | |
93b717fd | 202 | status = decode_delegation_stateid(xdr, &args->stateid); |
1da177e4 | 203 | if (unlikely(status != 0)) |
135a4ea0 | 204 | return status; |
1da177e4 | 205 | p = read_buf(xdr, 4); |
135a4ea0 AS |
206 | if (unlikely(p == NULL)) |
207 | return htonl(NFS4ERR_RESOURCE); | |
1da177e4 | 208 | args->truncate = ntohl(*p); |
135a4ea0 | 209 | return decode_fh(xdr, &args->fh); |
1da177e4 LT |
210 | } |
211 | ||
4aece6a1 | 212 | #if defined(CONFIG_NFS_V4_1) |
93b717fd TM |
213 | static __be32 decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) |
214 | { | |
215 | stateid->type = NFS4_LAYOUT_STATEID_TYPE; | |
216 | return decode_stateid(xdr, stateid); | |
217 | } | |
4aece6a1 | 218 | |
f2a62561 | 219 | static __be32 decode_layoutrecall_args(struct svc_rqst *rqstp, |
f4dac4ad | 220 | struct xdr_stream *xdr, void *argp) |
f2a62561 | 221 | { |
f4dac4ad | 222 | struct cb_layoutrecallargs *args = argp; |
f2a62561 FI |
223 | __be32 *p; |
224 | __be32 status = 0; | |
225 | uint32_t iomode; | |
226 | ||
f2a62561 | 227 | p = read_buf(xdr, 4 * sizeof(uint32_t)); |
c79d56d2 AS |
228 | if (unlikely(p == NULL)) |
229 | return htonl(NFS4ERR_BADXDR); | |
f2a62561 FI |
230 | |
231 | args->cbl_layout_type = ntohl(*p++); | |
232 | /* Depite the spec's xdr, iomode really belongs in the FILE switch, | |
25985edc | 233 | * as it is unusable and ignored with the other types. |
f2a62561 FI |
234 | */ |
235 | iomode = ntohl(*p++); | |
236 | args->cbl_layoutchanged = ntohl(*p++); | |
237 | args->cbl_recall_type = ntohl(*p++); | |
238 | ||
239 | if (args->cbl_recall_type == RETURN_FILE) { | |
240 | args->cbl_range.iomode = iomode; | |
241 | status = decode_fh(xdr, &args->cbl_fh); | |
242 | if (unlikely(status != 0)) | |
c79d56d2 | 243 | return status; |
f2a62561 FI |
244 | |
245 | p = read_buf(xdr, 2 * sizeof(uint64_t)); | |
c79d56d2 AS |
246 | if (unlikely(p == NULL)) |
247 | return htonl(NFS4ERR_BADXDR); | |
f2a62561 FI |
248 | p = xdr_decode_hyper(p, &args->cbl_range.offset); |
249 | p = xdr_decode_hyper(p, &args->cbl_range.length); | |
c79d56d2 | 250 | return decode_layout_stateid(xdr, &args->cbl_stateid); |
f2a62561 FI |
251 | } else if (args->cbl_recall_type == RETURN_FSID) { |
252 | p = read_buf(xdr, 2 * sizeof(uint64_t)); | |
c79d56d2 AS |
253 | if (unlikely(p == NULL)) |
254 | return htonl(NFS4ERR_BADXDR); | |
f2a62561 FI |
255 | p = xdr_decode_hyper(p, &args->cbl_fsid.major); |
256 | p = xdr_decode_hyper(p, &args->cbl_fsid.minor); | |
c79d56d2 AS |
257 | } else if (args->cbl_recall_type != RETURN_ALL) |
258 | return htonl(NFS4ERR_BADXDR); | |
259 | return 0; | |
f2a62561 FI |
260 | } |
261 | ||
1be5683b ME |
262 | static |
263 | __be32 decode_devicenotify_args(struct svc_rqst *rqstp, | |
264 | struct xdr_stream *xdr, | |
f4dac4ad | 265 | void *argp) |
1be5683b | 266 | { |
f4dac4ad | 267 | struct cb_devicenotifyargs *args = argp; |
1be5683b ME |
268 | __be32 *p; |
269 | __be32 status = 0; | |
270 | u32 tmp; | |
271 | int n, i; | |
272 | args->ndevs = 0; | |
273 | ||
274 | /* Num of device notifications */ | |
275 | p = read_buf(xdr, sizeof(uint32_t)); | |
276 | if (unlikely(p == NULL)) { | |
277 | status = htonl(NFS4ERR_BADXDR); | |
278 | goto out; | |
279 | } | |
280 | n = ntohl(*p++); | |
281 | if (n <= 0) | |
282 | goto out; | |
363e0df0 DC |
283 | if (n > ULONG_MAX / sizeof(*args->devs)) { |
284 | status = htonl(NFS4ERR_BADXDR); | |
285 | goto out; | |
286 | } | |
1be5683b | 287 | |
a4f743a6 | 288 | args->devs = kmalloc_array(n, sizeof(*args->devs), GFP_KERNEL); |
1be5683b ME |
289 | if (!args->devs) { |
290 | status = htonl(NFS4ERR_DELAY); | |
291 | goto out; | |
292 | } | |
293 | ||
294 | /* Decode each dev notification */ | |
295 | for (i = 0; i < n; i++) { | |
296 | struct cb_devicenotifyitem *dev = &args->devs[i]; | |
297 | ||
298 | p = read_buf(xdr, (4 * sizeof(uint32_t)) + NFS4_DEVICEID4_SIZE); | |
299 | if (unlikely(p == NULL)) { | |
300 | status = htonl(NFS4ERR_BADXDR); | |
301 | goto err; | |
302 | } | |
303 | ||
304 | tmp = ntohl(*p++); /* bitmap size */ | |
305 | if (tmp != 1) { | |
306 | status = htonl(NFS4ERR_INVAL); | |
307 | goto err; | |
308 | } | |
309 | dev->cbd_notify_type = ntohl(*p++); | |
310 | if (dev->cbd_notify_type != NOTIFY_DEVICEID4_CHANGE && | |
311 | dev->cbd_notify_type != NOTIFY_DEVICEID4_DELETE) { | |
312 | status = htonl(NFS4ERR_INVAL); | |
313 | goto err; | |
314 | } | |
315 | ||
316 | tmp = ntohl(*p++); /* opaque size */ | |
317 | if (((dev->cbd_notify_type == NOTIFY_DEVICEID4_CHANGE) && | |
318 | (tmp != NFS4_DEVICEID4_SIZE + 8)) || | |
319 | ((dev->cbd_notify_type == NOTIFY_DEVICEID4_DELETE) && | |
320 | (tmp != NFS4_DEVICEID4_SIZE + 4))) { | |
321 | status = htonl(NFS4ERR_INVAL); | |
322 | goto err; | |
323 | } | |
324 | dev->cbd_layout_type = ntohl(*p++); | |
325 | memcpy(dev->cbd_dev_id.data, p, NFS4_DEVICEID4_SIZE); | |
326 | p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE); | |
327 | ||
328 | if (dev->cbd_layout_type == NOTIFY_DEVICEID4_CHANGE) { | |
329 | p = read_buf(xdr, sizeof(uint32_t)); | |
330 | if (unlikely(p == NULL)) { | |
331 | status = htonl(NFS4ERR_BADXDR); | |
332 | goto err; | |
333 | } | |
334 | dev->cbd_immediate = ntohl(*p++); | |
335 | } else { | |
336 | dev->cbd_immediate = 0; | |
337 | } | |
338 | ||
339 | args->ndevs++; | |
340 | ||
341 | dprintk("%s: type %d layout 0x%x immediate %d\n", | |
342 | __func__, dev->cbd_notify_type, dev->cbd_layout_type, | |
343 | dev->cbd_immediate); | |
344 | } | |
345 | out: | |
346 | dprintk("%s: status %d ndevs %d\n", | |
347 | __func__, ntohl(status), args->ndevs); | |
348 | return status; | |
349 | err: | |
350 | kfree(args->devs); | |
351 | goto out; | |
352 | } | |
353 | ||
9733f0d9 | 354 | static __be32 decode_sessionid(struct xdr_stream *xdr, |
4aece6a1 BH |
355 | struct nfs4_sessionid *sid) |
356 | { | |
9733f0d9 | 357 | __be32 *p; |
4aece6a1 | 358 | |
590184a6 | 359 | p = read_buf(xdr, NFS4_MAX_SESSIONID_LEN); |
4aece6a1 | 360 | if (unlikely(p == NULL)) |
a419aef8 | 361 | return htonl(NFS4ERR_RESOURCE); |
4aece6a1 | 362 | |
590184a6 | 363 | memcpy(sid->data, p, NFS4_MAX_SESSIONID_LEN); |
4aece6a1 BH |
364 | return 0; |
365 | } | |
366 | ||
9733f0d9 | 367 | static __be32 decode_rc_list(struct xdr_stream *xdr, |
4aece6a1 BH |
368 | struct referring_call_list *rc_list) |
369 | { | |
9733f0d9 | 370 | __be32 *p; |
4aece6a1 | 371 | int i; |
9733f0d9 | 372 | __be32 status; |
4aece6a1 BH |
373 | |
374 | status = decode_sessionid(xdr, &rc_list->rcl_sessionid); | |
375 | if (status) | |
376 | goto out; | |
377 | ||
378 | status = htonl(NFS4ERR_RESOURCE); | |
379 | p = read_buf(xdr, sizeof(uint32_t)); | |
380 | if (unlikely(p == NULL)) | |
381 | goto out; | |
382 | ||
383 | rc_list->rcl_nrefcalls = ntohl(*p++); | |
384 | if (rc_list->rcl_nrefcalls) { | |
385 | p = read_buf(xdr, | |
386 | rc_list->rcl_nrefcalls * 2 * sizeof(uint32_t)); | |
387 | if (unlikely(p == NULL)) | |
388 | goto out; | |
a4f743a6 | 389 | rc_list->rcl_refcalls = kmalloc_array(rc_list->rcl_nrefcalls, |
4aece6a1 BH |
390 | sizeof(*rc_list->rcl_refcalls), |
391 | GFP_KERNEL); | |
392 | if (unlikely(rc_list->rcl_refcalls == NULL)) | |
393 | goto out; | |
394 | for (i = 0; i < rc_list->rcl_nrefcalls; i++) { | |
395 | rc_list->rcl_refcalls[i].rc_sequenceid = ntohl(*p++); | |
396 | rc_list->rcl_refcalls[i].rc_slotid = ntohl(*p++); | |
397 | } | |
398 | } | |
399 | status = 0; | |
400 | ||
401 | out: | |
402 | return status; | |
403 | } | |
404 | ||
9733f0d9 | 405 | static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp, |
4aece6a1 | 406 | struct xdr_stream *xdr, |
f4dac4ad | 407 | void *argp) |
4aece6a1 | 408 | { |
f4dac4ad | 409 | struct cb_sequenceargs *args = argp; |
9733f0d9 | 410 | __be32 *p; |
4aece6a1 | 411 | int i; |
9733f0d9 | 412 | __be32 status; |
4aece6a1 BH |
413 | |
414 | status = decode_sessionid(xdr, &args->csa_sessionid); | |
415 | if (status) | |
1796549a | 416 | return status; |
4aece6a1 | 417 | |
4aece6a1 BH |
418 | p = read_buf(xdr, 5 * sizeof(uint32_t)); |
419 | if (unlikely(p == NULL)) | |
1796549a | 420 | return htonl(NFS4ERR_RESOURCE); |
4aece6a1 | 421 | |
65fc64e5 | 422 | args->csa_addr = svc_addr(rqstp); |
4aece6a1 BH |
423 | args->csa_sequenceid = ntohl(*p++); |
424 | args->csa_slotid = ntohl(*p++); | |
425 | args->csa_highestslotid = ntohl(*p++); | |
426 | args->csa_cachethis = ntohl(*p++); | |
427 | args->csa_nrclists = ntohl(*p++); | |
428 | args->csa_rclists = NULL; | |
429 | if (args->csa_nrclists) { | |
0439f31c DC |
430 | args->csa_rclists = kmalloc_array(args->csa_nrclists, |
431 | sizeof(*args->csa_rclists), | |
432 | GFP_KERNEL); | |
4aece6a1 | 433 | if (unlikely(args->csa_rclists == NULL)) |
1796549a | 434 | return htonl(NFS4ERR_RESOURCE); |
4aece6a1 BH |
435 | |
436 | for (i = 0; i < args->csa_nrclists; i++) { | |
437 | status = decode_rc_list(xdr, &args->csa_rclists[i]); | |
d8ba1f97 TM |
438 | if (status) { |
439 | args->csa_nrclists = i; | |
4aece6a1 | 440 | goto out_free; |
d8ba1f97 | 441 | } |
4aece6a1 BH |
442 | } |
443 | } | |
1796549a | 444 | return 0; |
4aece6a1 BH |
445 | |
446 | out_free: | |
447 | for (i = 0; i < args->csa_nrclists; i++) | |
448 | kfree(args->csa_rclists[i].rcl_refcalls); | |
449 | kfree(args->csa_rclists); | |
1796549a | 450 | return status; |
4aece6a1 BH |
451 | } |
452 | ||
9733f0d9 | 453 | static __be32 decode_recallany_args(struct svc_rqst *rqstp, |
31f09607 | 454 | struct xdr_stream *xdr, |
f4dac4ad | 455 | void *argp) |
31f09607 | 456 | { |
f4dac4ad | 457 | struct cb_recallanyargs *args = argp; |
d743c3c9 PT |
458 | uint32_t bitmap[2]; |
459 | __be32 *p, status; | |
31f09607 | 460 | |
31f09607 AB |
461 | p = read_buf(xdr, 4); |
462 | if (unlikely(p == NULL)) | |
463 | return htonl(NFS4ERR_BADXDR); | |
464 | args->craa_objs_to_keep = ntohl(*p++); | |
d743c3c9 PT |
465 | status = decode_bitmap(xdr, bitmap); |
466 | if (unlikely(status)) | |
467 | return status; | |
468 | args->craa_type_mask = bitmap[0]; | |
31f09607 AB |
469 | |
470 | return 0; | |
471 | } | |
472 | ||
9733f0d9 | 473 | static __be32 decode_recallslot_args(struct svc_rqst *rqstp, |
b9efa1b2 | 474 | struct xdr_stream *xdr, |
f4dac4ad | 475 | void *argp) |
b9efa1b2 | 476 | { |
f4dac4ad | 477 | struct cb_recallslotargs *args = argp; |
b9efa1b2 AA |
478 | __be32 *p; |
479 | ||
b9efa1b2 AA |
480 | p = read_buf(xdr, 4); |
481 | if (unlikely(p == NULL)) | |
482 | return htonl(NFS4ERR_BADXDR); | |
d5fb4ce3 | 483 | args->crsa_target_highest_slotid = ntohl(*p++); |
b9efa1b2 AA |
484 | return 0; |
485 | } | |
486 | ||
db783688 JL |
487 | static __be32 decode_lockowner(struct xdr_stream *xdr, struct cb_notify_lock_args *args) |
488 | { | |
489 | __be32 *p; | |
490 | unsigned int len; | |
491 | ||
492 | p = read_buf(xdr, 12); | |
493 | if (unlikely(p == NULL)) | |
494 | return htonl(NFS4ERR_BADXDR); | |
495 | ||
496 | p = xdr_decode_hyper(p, &args->cbnl_owner.clientid); | |
497 | len = be32_to_cpu(*p); | |
498 | ||
499 | p = read_buf(xdr, len); | |
500 | if (unlikely(p == NULL)) | |
501 | return htonl(NFS4ERR_BADXDR); | |
502 | ||
503 | /* Only try to decode if the length is right */ | |
504 | if (len == 20) { | |
505 | p += 2; /* skip "lock id:" */ | |
506 | args->cbnl_owner.s_dev = be32_to_cpu(*p++); | |
507 | xdr_decode_hyper(p, &args->cbnl_owner.id); | |
508 | args->cbnl_valid = true; | |
509 | } else { | |
510 | args->cbnl_owner.s_dev = 0; | |
511 | args->cbnl_owner.id = 0; | |
512 | args->cbnl_valid = false; | |
513 | } | |
514 | return 0; | |
515 | } | |
516 | ||
f4dac4ad CH |
517 | static __be32 decode_notify_lock_args(struct svc_rqst *rqstp, |
518 | struct xdr_stream *xdr, void *argp) | |
db783688 | 519 | { |
f4dac4ad | 520 | struct cb_notify_lock_args *args = argp; |
db783688 JL |
521 | __be32 status; |
522 | ||
523 | status = decode_fh(xdr, &args->cbnl_fh); | |
524 | if (unlikely(status != 0)) | |
535ece2b AS |
525 | return status; |
526 | return decode_lockowner(xdr, args); | |
db783688 JL |
527 | } |
528 | ||
4aece6a1 BH |
529 | #endif /* CONFIG_NFS_V4_1 */ |
530 | ||
e6f684f6 | 531 | static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str) |
1da177e4 | 532 | { |
ab6e9aaf TM |
533 | if (unlikely(xdr_stream_encode_opaque(xdr, str, len) < 0)) |
534 | return cpu_to_be32(NFS4ERR_RESOURCE); | |
1da177e4 LT |
535 | return 0; |
536 | } | |
537 | ||
538 | #define CB_SUPPORTED_ATTR0 (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) | |
539 | #define CB_SUPPORTED_ATTR1 (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) | |
5704fdeb | 540 | static __be32 encode_attr_bitmap(struct xdr_stream *xdr, const uint32_t *bitmap, __be32 **savep) |
1da177e4 | 541 | { |
5704fdeb AV |
542 | __be32 bm[2]; |
543 | __be32 *p; | |
1da177e4 LT |
544 | |
545 | bm[0] = htonl(bitmap[0] & CB_SUPPORTED_ATTR0); | |
546 | bm[1] = htonl(bitmap[1] & CB_SUPPORTED_ATTR1); | |
547 | if (bm[1] != 0) { | |
548 | p = xdr_reserve_space(xdr, 16); | |
549 | if (unlikely(p == NULL)) | |
550 | return htonl(NFS4ERR_RESOURCE); | |
551 | *p++ = htonl(2); | |
552 | *p++ = bm[0]; | |
553 | *p++ = bm[1]; | |
554 | } else if (bm[0] != 0) { | |
555 | p = xdr_reserve_space(xdr, 12); | |
556 | if (unlikely(p == NULL)) | |
557 | return htonl(NFS4ERR_RESOURCE); | |
558 | *p++ = htonl(1); | |
559 | *p++ = bm[0]; | |
560 | } else { | |
561 | p = xdr_reserve_space(xdr, 8); | |
562 | if (unlikely(p == NULL)) | |
563 | return htonl(NFS4ERR_RESOURCE); | |
564 | *p++ = htonl(0); | |
565 | } | |
566 | *savep = p; | |
567 | return 0; | |
568 | } | |
569 | ||
e6f684f6 | 570 | static __be32 encode_attr_change(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t change) |
1da177e4 | 571 | { |
5704fdeb | 572 | __be32 *p; |
1da177e4 LT |
573 | |
574 | if (!(bitmap[0] & FATTR4_WORD0_CHANGE)) | |
575 | return 0; | |
576 | p = xdr_reserve_space(xdr, 8); | |
90dc7d27 | 577 | if (unlikely(!p)) |
1da177e4 LT |
578 | return htonl(NFS4ERR_RESOURCE); |
579 | p = xdr_encode_hyper(p, change); | |
580 | return 0; | |
581 | } | |
582 | ||
e6f684f6 | 583 | static __be32 encode_attr_size(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t size) |
1da177e4 | 584 | { |
5704fdeb | 585 | __be32 *p; |
1da177e4 LT |
586 | |
587 | if (!(bitmap[0] & FATTR4_WORD0_SIZE)) | |
588 | return 0; | |
589 | p = xdr_reserve_space(xdr, 8); | |
90dc7d27 | 590 | if (unlikely(!p)) |
1da177e4 LT |
591 | return htonl(NFS4ERR_RESOURCE); |
592 | p = xdr_encode_hyper(p, size); | |
593 | return 0; | |
594 | } | |
595 | ||
e6f684f6 | 596 | static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec *time) |
1da177e4 | 597 | { |
5704fdeb | 598 | __be32 *p; |
1da177e4 LT |
599 | |
600 | p = xdr_reserve_space(xdr, 12); | |
90dc7d27 | 601 | if (unlikely(!p)) |
1da177e4 LT |
602 | return htonl(NFS4ERR_RESOURCE); |
603 | p = xdr_encode_hyper(p, time->tv_sec); | |
604 | *p = htonl(time->tv_nsec); | |
605 | return 0; | |
606 | } | |
607 | ||
e6f684f6 | 608 | static __be32 encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) |
1da177e4 LT |
609 | { |
610 | if (!(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) | |
611 | return 0; | |
612 | return encode_attr_time(xdr,time); | |
613 | } | |
614 | ||
e6f684f6 | 615 | static __be32 encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) |
1da177e4 LT |
616 | { |
617 | if (!(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) | |
618 | return 0; | |
619 | return encode_attr_time(xdr,time); | |
620 | } | |
621 | ||
e6f684f6 | 622 | static __be32 encode_compound_hdr_res(struct xdr_stream *xdr, struct cb_compound_hdr_res *hdr) |
1da177e4 | 623 | { |
e6f684f6 | 624 | __be32 status; |
1da177e4 LT |
625 | |
626 | hdr->status = xdr_reserve_space(xdr, 4); | |
627 | if (unlikely(hdr->status == NULL)) | |
628 | return htonl(NFS4ERR_RESOURCE); | |
629 | status = encode_string(xdr, hdr->taglen, hdr->tag); | |
630 | if (unlikely(status != 0)) | |
631 | return status; | |
632 | hdr->nops = xdr_reserve_space(xdr, 4); | |
633 | if (unlikely(hdr->nops == NULL)) | |
634 | return htonl(NFS4ERR_RESOURCE); | |
635 | return 0; | |
636 | } | |
637 | ||
e6f684f6 | 638 | static __be32 encode_op_hdr(struct xdr_stream *xdr, uint32_t op, __be32 res) |
1da177e4 | 639 | { |
5704fdeb | 640 | __be32 *p; |
1da177e4 LT |
641 | |
642 | p = xdr_reserve_space(xdr, 8); | |
643 | if (unlikely(p == NULL)) | |
31d2b435 | 644 | return htonl(NFS4ERR_RESOURCE_HDR); |
1da177e4 LT |
645 | *p++ = htonl(op); |
646 | *p = res; | |
647 | return 0; | |
648 | } | |
649 | ||
f4dac4ad CH |
650 | static __be32 encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr, |
651 | const void *resp) | |
1da177e4 | 652 | { |
f4dac4ad | 653 | const struct cb_getattrres *res = resp; |
5704fdeb | 654 | __be32 *savep = NULL; |
e6f684f6 | 655 | __be32 status = res->status; |
1da177e4 LT |
656 | |
657 | if (unlikely(status != 0)) | |
658 | goto out; | |
659 | status = encode_attr_bitmap(xdr, res->bitmap, &savep); | |
660 | if (unlikely(status != 0)) | |
661 | goto out; | |
662 | status = encode_attr_change(xdr, res->bitmap, res->change_attr); | |
663 | if (unlikely(status != 0)) | |
664 | goto out; | |
665 | status = encode_attr_size(xdr, res->bitmap, res->size); | |
666 | if (unlikely(status != 0)) | |
667 | goto out; | |
668 | status = encode_attr_ctime(xdr, res->bitmap, &res->ctime); | |
669 | if (unlikely(status != 0)) | |
670 | goto out; | |
671 | status = encode_attr_mtime(xdr, res->bitmap, &res->mtime); | |
672 | *savep = htonl((unsigned int)((char *)xdr->p - (char *)(savep+1))); | |
673 | out: | |
1da177e4 LT |
674 | return status; |
675 | } | |
676 | ||
34bc47c9 BH |
677 | #if defined(CONFIG_NFS_V4_1) |
678 | ||
9733f0d9 | 679 | static __be32 encode_sessionid(struct xdr_stream *xdr, |
4aece6a1 BH |
680 | const struct nfs4_sessionid *sid) |
681 | { | |
9733f0d9 | 682 | __be32 *p; |
4aece6a1 | 683 | |
590184a6 | 684 | p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN); |
4aece6a1 BH |
685 | if (unlikely(p == NULL)) |
686 | return htonl(NFS4ERR_RESOURCE); | |
687 | ||
590184a6 | 688 | memcpy(p, sid, NFS4_MAX_SESSIONID_LEN); |
4aece6a1 BH |
689 | return 0; |
690 | } | |
691 | ||
9733f0d9 | 692 | static __be32 encode_cb_sequence_res(struct svc_rqst *rqstp, |
4aece6a1 | 693 | struct xdr_stream *xdr, |
f4dac4ad | 694 | const void *resp) |
4aece6a1 | 695 | { |
f4dac4ad | 696 | const struct cb_sequenceres *res = resp; |
9733f0d9 | 697 | __be32 *p; |
e216c8c7 | 698 | __be32 status = res->csr_status; |
4aece6a1 BH |
699 | |
700 | if (unlikely(status != 0)) | |
3d0bfaa6 | 701 | return status; |
4aece6a1 | 702 | |
e0a63c0b KM |
703 | status = encode_sessionid(xdr, &res->csr_sessionid); |
704 | if (status) | |
3d0bfaa6 | 705 | return status; |
4aece6a1 BH |
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); | |
3d0bfaa6 | 715 | return 0; |
4aece6a1 BH |
716 | } |
717 | ||
34bc47c9 BH |
718 | static __be32 |
719 | preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) | |
720 | { | |
281fe15d BH |
721 | if (op_nr == OP_CB_SEQUENCE) { |
722 | if (nop != 0) | |
723 | return htonl(NFS4ERR_SEQUENCE_POS); | |
724 | } else { | |
725 | if (nop == 0) | |
726 | return htonl(NFS4ERR_OP_NOT_IN_SESSION); | |
727 | } | |
728 | ||
34bc47c9 BH |
729 | switch (op_nr) { |
730 | case OP_CB_GETATTR: | |
731 | case OP_CB_RECALL: | |
4aece6a1 | 732 | case OP_CB_SEQUENCE: |
31f09607 | 733 | case OP_CB_RECALL_ANY: |
b9efa1b2 | 734 | case OP_CB_RECALL_SLOT: |
f2a62561 | 735 | case OP_CB_LAYOUTRECALL: |
1be5683b | 736 | case OP_CB_NOTIFY_DEVICEID: |
db783688 | 737 | case OP_CB_NOTIFY_LOCK: |
34bc47c9 BH |
738 | *op = &callback_ops[op_nr]; |
739 | break; | |
740 | ||
34bc47c9 BH |
741 | case OP_CB_NOTIFY: |
742 | case OP_CB_PUSH_DELEG: | |
34bc47c9 | 743 | case OP_CB_RECALLABLE_OBJ_AVAIL: |
34bc47c9 | 744 | case OP_CB_WANTS_CANCELLED: |
34bc47c9 BH |
745 | return htonl(NFS4ERR_NOTSUPP); |
746 | ||
747 | default: | |
748 | return htonl(NFS4ERR_OP_ILLEGAL); | |
749 | } | |
750 | ||
751 | return htonl(NFS_OK); | |
752 | } | |
753 | ||
810d82e6 TM |
754 | static void nfs4_callback_free_slot(struct nfs4_session *session, |
755 | struct nfs4_slot *slot) | |
42acd021 AA |
756 | { |
757 | struct nfs4_slot_table *tbl = &session->bc_slot_table; | |
758 | ||
759 | spin_lock(&tbl->slot_tbl_lock); | |
760 | /* | |
761 | * Let the state manager know callback processing done. | |
762 | * A single slot, so highest used slotid is either 0 or -1 | |
763 | */ | |
810d82e6 | 764 | nfs4_free_slot(tbl, slot); |
42acd021 AA |
765 | spin_unlock(&tbl->slot_tbl_lock); |
766 | } | |
767 | ||
55a67399 | 768 | static void nfs4_cb_free_slot(struct cb_process_state *cps) |
42acd021 | 769 | { |
810d82e6 TM |
770 | if (cps->slot) { |
771 | nfs4_callback_free_slot(cps->clp->cl_session, cps->slot); | |
772 | cps->slot = NULL; | |
773 | } | |
42acd021 AA |
774 | } |
775 | ||
34bc47c9 BH |
776 | #else /* CONFIG_NFS_V4_1 */ |
777 | ||
778 | static __be32 | |
779 | preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) | |
780 | { | |
781 | return htonl(NFS4ERR_MINOR_VERS_MISMATCH); | |
782 | } | |
783 | ||
55a67399 | 784 | static void nfs4_cb_free_slot(struct cb_process_state *cps) |
42acd021 AA |
785 | { |
786 | } | |
34bc47c9 BH |
787 | #endif /* CONFIG_NFS_V4_1 */ |
788 | ||
6b140b85 BS |
789 | #ifdef CONFIG_NFS_V4_2 |
790 | static __be32 | |
791 | preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op) | |
792 | { | |
793 | __be32 status = preprocess_nfs41_op(nop, op_nr, op); | |
794 | if (status != htonl(NFS4ERR_OP_ILLEGAL)) | |
795 | return status; | |
796 | ||
797 | if (op_nr == OP_CB_OFFLOAD) | |
798 | return htonl(NFS4ERR_NOTSUPP); | |
799 | return htonl(NFS4ERR_OP_ILLEGAL); | |
800 | } | |
801 | #else /* CONFIG_NFS_V4_2 */ | |
802 | static __be32 | |
803 | preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op) | |
804 | { | |
805 | return htonl(NFS4ERR_MINOR_VERS_MISMATCH); | |
806 | } | |
807 | #endif /* CONFIG_NFS_V4_2 */ | |
808 | ||
34bc47c9 BH |
809 | static __be32 |
810 | preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op) | |
811 | { | |
812 | switch (op_nr) { | |
813 | case OP_CB_GETATTR: | |
814 | case OP_CB_RECALL: | |
815 | *op = &callback_ops[op_nr]; | |
816 | break; | |
817 | default: | |
818 | return htonl(NFS4ERR_OP_ILLEGAL); | |
819 | } | |
820 | ||
821 | return htonl(NFS_OK); | |
822 | } | |
823 | ||
459de2ed | 824 | static __be32 process_op(int nop, struct svc_rqst *rqstp, |
1da177e4 | 825 | struct xdr_stream *xdr_in, void *argp, |
c36fca52 AA |
826 | struct xdr_stream *xdr_out, void *resp, |
827 | struct cb_process_state *cps) | |
1da177e4 | 828 | { |
a162a6b8 | 829 | struct callback_op *op = &callback_ops[0]; |
31d2b435 | 830 | unsigned int op_nr; |
34bc47c9 | 831 | __be32 status; |
1da177e4 | 832 | long maxlen; |
e6f684f6 | 833 | __be32 res; |
1da177e4 | 834 | |
1da177e4 | 835 | status = decode_op_hdr(xdr_in, &op_nr); |
31d2b435 AA |
836 | if (unlikely(status)) |
837 | return status; | |
1da177e4 | 838 | |
6b140b85 BS |
839 | switch (cps->minorversion) { |
840 | case 0: | |
841 | status = preprocess_nfs4_op(op_nr, &op); | |
842 | break; | |
843 | case 1: | |
844 | status = preprocess_nfs41_op(nop, op_nr, &op); | |
845 | break; | |
846 | case 2: | |
847 | status = preprocess_nfs42_op(nop, op_nr, &op); | |
848 | break; | |
849 | default: | |
850 | status = htonl(NFS4ERR_MINOR_VERS_MISMATCH); | |
851 | } | |
34bc47c9 | 852 | |
34bc47c9 BH |
853 | if (status == htonl(NFS4ERR_OP_ILLEGAL)) |
854 | op_nr = OP_CB_ILLEGAL; | |
b92b3019 AA |
855 | if (status) |
856 | goto encode_hdr; | |
31d2b435 | 857 | |
c36fca52 AA |
858 | if (cps->drc_status) { |
859 | status = cps->drc_status; | |
4911096f AA |
860 | goto encode_hdr; |
861 | } | |
862 | ||
1da177e4 LT |
863 | maxlen = xdr_out->end - xdr_out->p; |
864 | if (maxlen > 0 && maxlen < PAGE_SIZE) { | |
e95e60da AA |
865 | status = op->decode_args(rqstp, xdr_in, argp); |
866 | if (likely(status == 0)) | |
c36fca52 | 867 | status = op->process_op(argp, resp, cps); |
1da177e4 LT |
868 | } else |
869 | status = htonl(NFS4ERR_RESOURCE); | |
870 | ||
b92b3019 | 871 | encode_hdr: |
1da177e4 | 872 | res = encode_op_hdr(xdr_out, op_nr, status); |
31d2b435 AA |
873 | if (unlikely(res)) |
874 | return res; | |
1da177e4 LT |
875 | if (op->encode_res != NULL && status == 0) |
876 | status = op->encode_res(rqstp, xdr_out, resp); | |
1da177e4 LT |
877 | return status; |
878 | } | |
879 | ||
880 | /* | |
881 | * Decode, process and encode a COMPOUND | |
882 | */ | |
a6beb732 | 883 | static __be32 nfs4_callback_compound(struct svc_rqst *rqstp) |
1da177e4 | 884 | { |
3a6258e1 TM |
885 | struct cb_compound_hdr_arg hdr_arg = { 0 }; |
886 | struct cb_compound_hdr_res hdr_res = { NULL }; | |
1da177e4 | 887 | struct xdr_stream xdr_in, xdr_out; |
c36fca52 AA |
888 | __be32 *p, status; |
889 | struct cb_process_state cps = { | |
890 | .drc_status = 0, | |
891 | .clp = NULL, | |
9695c705 | 892 | .net = SVC_NET(rqstp), |
c36fca52 | 893 | }; |
3a6258e1 | 894 | unsigned int nops = 0; |
1da177e4 | 895 | |
756b9b37 | 896 | xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base); |
1da177e4 | 897 | |
5704fdeb | 898 | p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len); |
1da177e4 LT |
899 | xdr_init_encode(&xdr_out, &rqstp->rq_res, p); |
900 | ||
3a6258e1 | 901 | status = decode_compound_hdr_arg(&xdr_in, &hdr_arg); |
4ed0d83d | 902 | if (status == htonl(NFS4ERR_RESOURCE)) |
3a6258e1 TM |
903 | return rpc_garbage_args; |
904 | ||
c36fca52 | 905 | if (hdr_arg.minorversion == 0) { |
9695c705 | 906 | cps.clp = nfs4_find_client_ident(SVC_NET(rqstp), hdr_arg.cb_ident); |
778be232 | 907 | if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp)) |
a4e187d8 | 908 | goto out_invalidcred; |
778be232 | 909 | } |
c36fca52 | 910 | |
459de2ed | 911 | cps.minorversion = hdr_arg.minorversion; |
1da177e4 LT |
912 | hdr_res.taglen = hdr_arg.taglen; |
913 | hdr_res.tag = hdr_arg.tag; | |
3a6258e1 TM |
914 | if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0) |
915 | return rpc_system_err; | |
1da177e4 | 916 | |
3a6258e1 | 917 | while (status == 0 && nops != hdr_arg.nops) { |
459de2ed | 918 | status = process_op(nops, rqstp, &xdr_in, |
a6beb732 CH |
919 | rqstp->rq_argp, &xdr_out, rqstp->rq_resp, |
920 | &cps); | |
1da177e4 LT |
921 | nops++; |
922 | } | |
3a6258e1 | 923 | |
31d2b435 AA |
924 | /* Buffer overflow in decode_ops_hdr or encode_ops_hdr. Return |
925 | * resource error in cb_compound status without returning op */ | |
926 | if (unlikely(status == htonl(NFS4ERR_RESOURCE_HDR))) { | |
927 | status = htonl(NFS4ERR_RESOURCE); | |
928 | nops--; | |
929 | } | |
930 | ||
1da177e4 LT |
931 | *hdr_res.status = status; |
932 | *hdr_res.nops = htonl(nops); | |
55a67399 | 933 | nfs4_cb_free_slot(&cps); |
c36fca52 | 934 | nfs_put_client(cps.clp); |
1da177e4 | 935 | return rpc_success; |
a4e187d8 CL |
936 | |
937 | out_invalidcred: | |
938 | pr_warn_ratelimited("NFS: NFSv4 callback contains invalid cred\n"); | |
939 | return rpc_autherr_badcred; | |
1da177e4 LT |
940 | } |
941 | ||
942 | /* | |
943 | * Define NFS4 callback COMPOUND ops. | |
944 | */ | |
945 | static struct callback_op callback_ops[] = { | |
946 | [0] = { | |
947 | .res_maxsize = CB_OP_HDR_RES_MAXSZ, | |
948 | }, | |
949 | [OP_CB_GETATTR] = { | |
f4dac4ad CH |
950 | .process_op = nfs4_callback_getattr, |
951 | .decode_args = decode_getattr_args, | |
952 | .encode_res = encode_getattr_res, | |
1da177e4 LT |
953 | .res_maxsize = CB_OP_GETATTR_RES_MAXSZ, |
954 | }, | |
955 | [OP_CB_RECALL] = { | |
f4dac4ad CH |
956 | .process_op = nfs4_callback_recall, |
957 | .decode_args = decode_recall_args, | |
1da177e4 | 958 | .res_maxsize = CB_OP_RECALL_RES_MAXSZ, |
4aece6a1 BH |
959 | }, |
960 | #if defined(CONFIG_NFS_V4_1) | |
f2a62561 | 961 | [OP_CB_LAYOUTRECALL] = { |
f4dac4ad CH |
962 | .process_op = nfs4_callback_layoutrecall, |
963 | .decode_args = decode_layoutrecall_args, | |
f2a62561 FI |
964 | .res_maxsize = CB_OP_LAYOUTRECALL_RES_MAXSZ, |
965 | }, | |
1be5683b | 966 | [OP_CB_NOTIFY_DEVICEID] = { |
f4dac4ad CH |
967 | .process_op = nfs4_callback_devicenotify, |
968 | .decode_args = decode_devicenotify_args, | |
1be5683b ME |
969 | .res_maxsize = CB_OP_DEVICENOTIFY_RES_MAXSZ, |
970 | }, | |
4aece6a1 | 971 | [OP_CB_SEQUENCE] = { |
f4dac4ad CH |
972 | .process_op = nfs4_callback_sequence, |
973 | .decode_args = decode_cb_sequence_args, | |
974 | .encode_res = encode_cb_sequence_res, | |
4aece6a1 BH |
975 | .res_maxsize = CB_OP_SEQUENCE_RES_MAXSZ, |
976 | }, | |
31f09607 | 977 | [OP_CB_RECALL_ANY] = { |
f4dac4ad CH |
978 | .process_op = nfs4_callback_recallany, |
979 | .decode_args = decode_recallany_args, | |
31f09607 AB |
980 | .res_maxsize = CB_OP_RECALLANY_RES_MAXSZ, |
981 | }, | |
b9efa1b2 | 982 | [OP_CB_RECALL_SLOT] = { |
f4dac4ad CH |
983 | .process_op = nfs4_callback_recallslot, |
984 | .decode_args = decode_recallslot_args, | |
b9efa1b2 AA |
985 | .res_maxsize = CB_OP_RECALLSLOT_RES_MAXSZ, |
986 | }, | |
db783688 | 987 | [OP_CB_NOTIFY_LOCK] = { |
f4dac4ad CH |
988 | .process_op = nfs4_callback_notify_lock, |
989 | .decode_args = decode_notify_lock_args, | |
db783688 JL |
990 | .res_maxsize = CB_OP_NOTIFY_LOCK_RES_MAXSZ, |
991 | }, | |
4aece6a1 | 992 | #endif /* CONFIG_NFS_V4_1 */ |
1da177e4 LT |
993 | }; |
994 | ||
995 | /* | |
996 | * Define NFS4 callback procedures | |
997 | */ | |
860bda29 | 998 | static const struct svc_procedure nfs4_callback_procedures1[] = { |
1da177e4 LT |
999 | [CB_NULL] = { |
1000 | .pc_func = nfs4_callback_null, | |
026fec7e | 1001 | .pc_decode = nfs4_decode_void, |
63f8de37 | 1002 | .pc_encode = nfs4_encode_void, |
1da177e4 LT |
1003 | .pc_xdrressize = 1, |
1004 | }, | |
1005 | [CB_COMPOUND] = { | |
1006 | .pc_func = nfs4_callback_compound, | |
63f8de37 | 1007 | .pc_encode = nfs4_encode_void, |
1da177e4 LT |
1008 | .pc_argsize = 256, |
1009 | .pc_ressize = 256, | |
1010 | .pc_xdrressize = NFS4_CALLBACK_BUFSIZE, | |
1011 | } | |
1012 | }; | |
1013 | ||
7fd38af9 | 1014 | static unsigned int nfs4_callback_count1[ARRAY_SIZE(nfs4_callback_procedures1)]; |
e9679189 | 1015 | const struct svc_version nfs4_callback_version1 = { |
1da177e4 LT |
1016 | .vs_vers = 1, |
1017 | .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), | |
1018 | .vs_proc = nfs4_callback_procedures1, | |
7fd38af9 | 1019 | .vs_count = nfs4_callback_count1, |
1da177e4 LT |
1020 | .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, |
1021 | .vs_dispatch = NULL, | |
05a45a2d | 1022 | .vs_hidden = true, |
5283b03e | 1023 | .vs_need_cong_ctrl = true, |
1da177e4 LT |
1024 | }; |
1025 | ||
7fd38af9 | 1026 | static unsigned int nfs4_callback_count4[ARRAY_SIZE(nfs4_callback_procedures1)]; |
e9679189 | 1027 | const struct svc_version nfs4_callback_version4 = { |
07bccc2d AB |
1028 | .vs_vers = 4, |
1029 | .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), | |
1030 | .vs_proc = nfs4_callback_procedures1, | |
7fd38af9 | 1031 | .vs_count = nfs4_callback_count4, |
07bccc2d AB |
1032 | .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, |
1033 | .vs_dispatch = NULL, | |
05a45a2d | 1034 | .vs_hidden = true, |
5283b03e | 1035 | .vs_need_cong_ctrl = true, |
07bccc2d | 1036 | }; |