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 | 40 | #endif /* CONFIG_NFS_V4_1 */ |
5178a125 OK |
41 | #ifdef CONFIG_NFS_V4_2 |
42 | #define CB_OP_OFFLOAD_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) | |
43 | #endif /* CONFIG_NFS_V4_2 */ | |
4aece6a1 | 44 | |
1da177e4 LT |
45 | #define NFSDBG_FACILITY NFSDBG_CALLBACK |
46 | ||
31d2b435 AA |
47 | /* Internal error code */ |
48 | #define NFS4ERR_RESOURCE_HDR 11050 | |
49 | ||
1da177e4 | 50 | struct callback_op { |
f4dac4ad CH |
51 | __be32 (*process_op)(void *, void *, struct cb_process_state *); |
52 | __be32 (*decode_args)(struct svc_rqst *, struct xdr_stream *, void *); | |
53 | __be32 (*encode_res)(struct svc_rqst *, struct xdr_stream *, | |
54 | const void *); | |
1da177e4 LT |
55 | long res_maxsize; |
56 | }; | |
57 | ||
58 | static struct callback_op callback_ops[]; | |
59 | ||
a6beb732 | 60 | static __be32 nfs4_callback_null(struct svc_rqst *rqstp) |
1da177e4 LT |
61 | { |
62 | return htonl(NFS4_OK); | |
63 | } | |
64 | ||
026fec7e | 65 | static int nfs4_decode_void(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 LT |
66 | { |
67 | return xdr_argsize_check(rqstp, p); | |
68 | } | |
69 | ||
63f8de37 | 70 | static int nfs4_encode_void(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 LT |
71 | { |
72 | return xdr_ressize_check(rqstp, p); | |
73 | } | |
74 | ||
b60475c9 | 75 | static __be32 *read_buf(struct xdr_stream *xdr, size_t nbytes) |
1da177e4 | 76 | { |
5704fdeb | 77 | __be32 *p; |
1da177e4 LT |
78 | |
79 | p = xdr_inline_decode(xdr, nbytes); | |
80 | if (unlikely(p == NULL)) | |
756b9b37 | 81 | printk(KERN_WARNING "NFS: NFSv4 callback reply buffer overflowed!\n"); |
1da177e4 LT |
82 | return p; |
83 | } | |
84 | ||
c065eeea TM |
85 | static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len, |
86 | const char **str, size_t maxlen) | |
1da177e4 | 87 | { |
c065eeea | 88 | ssize_t err; |
1da177e4 | 89 | |
c065eeea TM |
90 | err = xdr_stream_decode_opaque_inline(xdr, (void **)str, maxlen); |
91 | if (err < 0) | |
92 | return cpu_to_be32(NFS4ERR_RESOURCE); | |
93 | *len = err; | |
1da177e4 LT |
94 | return 0; |
95 | } | |
96 | ||
e6f684f6 | 97 | static __be32 decode_fh(struct xdr_stream *xdr, struct nfs_fh *fh) |
1da177e4 | 98 | { |
5704fdeb | 99 | __be32 *p; |
1da177e4 LT |
100 | |
101 | p = read_buf(xdr, 4); | |
102 | if (unlikely(p == NULL)) | |
103 | return htonl(NFS4ERR_RESOURCE); | |
104 | fh->size = ntohl(*p); | |
105 | if (fh->size > NFS4_FHSIZE) | |
106 | return htonl(NFS4ERR_BADHANDLE); | |
107 | p = read_buf(xdr, fh->size); | |
108 | if (unlikely(p == NULL)) | |
109 | return htonl(NFS4ERR_RESOURCE); | |
110 | memcpy(&fh->data[0], p, fh->size); | |
111 | memset(&fh->data[fh->size], 0, sizeof(fh->data) - fh->size); | |
112 | return 0; | |
113 | } | |
114 | ||
e6f684f6 | 115 | static __be32 decode_bitmap(struct xdr_stream *xdr, uint32_t *bitmap) |
1da177e4 | 116 | { |
5704fdeb | 117 | __be32 *p; |
1da177e4 LT |
118 | unsigned int attrlen; |
119 | ||
120 | p = read_buf(xdr, 4); | |
121 | if (unlikely(p == NULL)) | |
122 | return htonl(NFS4ERR_RESOURCE); | |
123 | attrlen = ntohl(*p); | |
124 | p = read_buf(xdr, attrlen << 2); | |
125 | if (unlikely(p == NULL)) | |
126 | return htonl(NFS4ERR_RESOURCE); | |
127 | if (likely(attrlen > 0)) | |
128 | bitmap[0] = ntohl(*p++); | |
129 | if (attrlen > 1) | |
130 | bitmap[1] = ntohl(*p); | |
131 | return 0; | |
132 | } | |
133 | ||
e6f684f6 | 134 | static __be32 decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) |
1da177e4 | 135 | { |
5704fdeb | 136 | __be32 *p; |
1da177e4 | 137 | |
2d2f24ad | 138 | p = read_buf(xdr, NFS4_STATEID_SIZE); |
1da177e4 LT |
139 | if (unlikely(p == NULL)) |
140 | return htonl(NFS4ERR_RESOURCE); | |
93b717fd | 141 | memcpy(stateid->data, p, NFS4_STATEID_SIZE); |
1da177e4 LT |
142 | return 0; |
143 | } | |
144 | ||
93b717fd TM |
145 | static __be32 decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) |
146 | { | |
147 | stateid->type = NFS4_DELEGATION_STATEID_TYPE; | |
148 | return decode_stateid(xdr, stateid); | |
149 | } | |
150 | ||
e6f684f6 | 151 | static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound_hdr_arg *hdr) |
1da177e4 | 152 | { |
5704fdeb | 153 | __be32 *p; |
e6f684f6 | 154 | __be32 status; |
1da177e4 | 155 | |
c065eeea | 156 | status = decode_string(xdr, &hdr->taglen, &hdr->tag, CB_OP_TAGLEN_MAXSZ); |
1da177e4 LT |
157 | if (unlikely(status != 0)) |
158 | return status; | |
1da177e4 LT |
159 | p = read_buf(xdr, 12); |
160 | if (unlikely(p == NULL)) | |
161 | return htonl(NFS4ERR_RESOURCE); | |
b8f2ef84 | 162 | hdr->minorversion = ntohl(*p++); |
459de2ed BS |
163 | /* Check for minor version support */ |
164 | if (hdr->minorversion <= NFS4_MAX_MINOR_VERSION) { | |
42c2c424 | 165 | hdr->cb_ident = ntohl(*p++); /* ignored by v4.1 and v4.2 */ |
48a9e2d2 | 166 | } else { |
9a3ba432 | 167 | pr_warn_ratelimited("NFS: %s: NFSv4 server callback with " |
b8f2ef84 BH |
168 | "illegal minor version %u!\n", |
169 | __func__, hdr->minorversion); | |
1da177e4 LT |
170 | return htonl(NFS4ERR_MINOR_VERS_MISMATCH); |
171 | } | |
1da177e4 LT |
172 | hdr->nops = ntohl(*p); |
173 | return 0; | |
174 | } | |
175 | ||
e6f684f6 | 176 | static __be32 decode_op_hdr(struct xdr_stream *xdr, unsigned int *op) |
1da177e4 | 177 | { |
5704fdeb | 178 | __be32 *p; |
1da177e4 LT |
179 | p = read_buf(xdr, 4); |
180 | if (unlikely(p == NULL)) | |
31d2b435 | 181 | return htonl(NFS4ERR_RESOURCE_HDR); |
1da177e4 LT |
182 | *op = ntohl(*p); |
183 | return 0; | |
184 | } | |
185 | ||
f4dac4ad CH |
186 | static __be32 decode_getattr_args(struct svc_rqst *rqstp, |
187 | struct xdr_stream *xdr, void *argp) | |
1da177e4 | 188 | { |
f4dac4ad | 189 | struct cb_getattrargs *args = argp; |
e6f684f6 | 190 | __be32 status; |
1da177e4 LT |
191 | |
192 | status = decode_fh(xdr, &args->fh); | |
193 | if (unlikely(status != 0)) | |
56938bb7 AS |
194 | return status; |
195 | return decode_bitmap(xdr, args->bitmap); | |
1da177e4 LT |
196 | } |
197 | ||
f4dac4ad CH |
198 | static __be32 decode_recall_args(struct svc_rqst *rqstp, |
199 | struct xdr_stream *xdr, void *argp) | |
1da177e4 | 200 | { |
f4dac4ad | 201 | struct cb_recallargs *args = argp; |
5704fdeb | 202 | __be32 *p; |
e6f684f6 | 203 | __be32 status; |
1da177e4 | 204 | |
93b717fd | 205 | status = decode_delegation_stateid(xdr, &args->stateid); |
1da177e4 | 206 | if (unlikely(status != 0)) |
135a4ea0 | 207 | return status; |
1da177e4 | 208 | p = read_buf(xdr, 4); |
135a4ea0 AS |
209 | if (unlikely(p == NULL)) |
210 | return htonl(NFS4ERR_RESOURCE); | |
1da177e4 | 211 | args->truncate = ntohl(*p); |
135a4ea0 | 212 | return decode_fh(xdr, &args->fh); |
1da177e4 LT |
213 | } |
214 | ||
4aece6a1 | 215 | #if defined(CONFIG_NFS_V4_1) |
93b717fd TM |
216 | static __be32 decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) |
217 | { | |
218 | stateid->type = NFS4_LAYOUT_STATEID_TYPE; | |
219 | return decode_stateid(xdr, stateid); | |
220 | } | |
4aece6a1 | 221 | |
f2a62561 | 222 | static __be32 decode_layoutrecall_args(struct svc_rqst *rqstp, |
f4dac4ad | 223 | struct xdr_stream *xdr, void *argp) |
f2a62561 | 224 | { |
f4dac4ad | 225 | struct cb_layoutrecallargs *args = argp; |
f2a62561 FI |
226 | __be32 *p; |
227 | __be32 status = 0; | |
228 | uint32_t iomode; | |
229 | ||
f2a62561 | 230 | p = read_buf(xdr, 4 * sizeof(uint32_t)); |
c79d56d2 AS |
231 | if (unlikely(p == NULL)) |
232 | return htonl(NFS4ERR_BADXDR); | |
f2a62561 FI |
233 | |
234 | args->cbl_layout_type = ntohl(*p++); | |
235 | /* Depite the spec's xdr, iomode really belongs in the FILE switch, | |
25985edc | 236 | * as it is unusable and ignored with the other types. |
f2a62561 FI |
237 | */ |
238 | iomode = ntohl(*p++); | |
239 | args->cbl_layoutchanged = ntohl(*p++); | |
240 | args->cbl_recall_type = ntohl(*p++); | |
241 | ||
242 | if (args->cbl_recall_type == RETURN_FILE) { | |
243 | args->cbl_range.iomode = iomode; | |
244 | status = decode_fh(xdr, &args->cbl_fh); | |
245 | if (unlikely(status != 0)) | |
c79d56d2 | 246 | return status; |
f2a62561 FI |
247 | |
248 | p = read_buf(xdr, 2 * sizeof(uint64_t)); | |
c79d56d2 AS |
249 | if (unlikely(p == NULL)) |
250 | return htonl(NFS4ERR_BADXDR); | |
f2a62561 FI |
251 | p = xdr_decode_hyper(p, &args->cbl_range.offset); |
252 | p = xdr_decode_hyper(p, &args->cbl_range.length); | |
c79d56d2 | 253 | return decode_layout_stateid(xdr, &args->cbl_stateid); |
f2a62561 FI |
254 | } else if (args->cbl_recall_type == RETURN_FSID) { |
255 | p = read_buf(xdr, 2 * sizeof(uint64_t)); | |
c79d56d2 AS |
256 | if (unlikely(p == NULL)) |
257 | return htonl(NFS4ERR_BADXDR); | |
f2a62561 FI |
258 | p = xdr_decode_hyper(p, &args->cbl_fsid.major); |
259 | p = xdr_decode_hyper(p, &args->cbl_fsid.minor); | |
c79d56d2 AS |
260 | } else if (args->cbl_recall_type != RETURN_ALL) |
261 | return htonl(NFS4ERR_BADXDR); | |
262 | return 0; | |
f2a62561 FI |
263 | } |
264 | ||
1be5683b ME |
265 | static |
266 | __be32 decode_devicenotify_args(struct svc_rqst *rqstp, | |
267 | struct xdr_stream *xdr, | |
f4dac4ad | 268 | void *argp) |
1be5683b | 269 | { |
f4dac4ad | 270 | struct cb_devicenotifyargs *args = argp; |
1be5683b ME |
271 | __be32 *p; |
272 | __be32 status = 0; | |
273 | u32 tmp; | |
274 | int n, i; | |
275 | args->ndevs = 0; | |
276 | ||
277 | /* Num of device notifications */ | |
278 | p = read_buf(xdr, sizeof(uint32_t)); | |
279 | if (unlikely(p == NULL)) { | |
280 | status = htonl(NFS4ERR_BADXDR); | |
281 | goto out; | |
282 | } | |
283 | n = ntohl(*p++); | |
284 | if (n <= 0) | |
285 | goto out; | |
363e0df0 DC |
286 | if (n > ULONG_MAX / sizeof(*args->devs)) { |
287 | status = htonl(NFS4ERR_BADXDR); | |
288 | goto out; | |
289 | } | |
1be5683b | 290 | |
a4f743a6 | 291 | args->devs = kmalloc_array(n, sizeof(*args->devs), GFP_KERNEL); |
1be5683b ME |
292 | if (!args->devs) { |
293 | status = htonl(NFS4ERR_DELAY); | |
294 | goto out; | |
295 | } | |
296 | ||
297 | /* Decode each dev notification */ | |
298 | for (i = 0; i < n; i++) { | |
299 | struct cb_devicenotifyitem *dev = &args->devs[i]; | |
300 | ||
301 | p = read_buf(xdr, (4 * sizeof(uint32_t)) + NFS4_DEVICEID4_SIZE); | |
302 | if (unlikely(p == NULL)) { | |
303 | status = htonl(NFS4ERR_BADXDR); | |
304 | goto err; | |
305 | } | |
306 | ||
307 | tmp = ntohl(*p++); /* bitmap size */ | |
308 | if (tmp != 1) { | |
309 | status = htonl(NFS4ERR_INVAL); | |
310 | goto err; | |
311 | } | |
312 | dev->cbd_notify_type = ntohl(*p++); | |
313 | if (dev->cbd_notify_type != NOTIFY_DEVICEID4_CHANGE && | |
314 | dev->cbd_notify_type != NOTIFY_DEVICEID4_DELETE) { | |
315 | status = htonl(NFS4ERR_INVAL); | |
316 | goto err; | |
317 | } | |
318 | ||
319 | tmp = ntohl(*p++); /* opaque size */ | |
320 | if (((dev->cbd_notify_type == NOTIFY_DEVICEID4_CHANGE) && | |
321 | (tmp != NFS4_DEVICEID4_SIZE + 8)) || | |
322 | ((dev->cbd_notify_type == NOTIFY_DEVICEID4_DELETE) && | |
323 | (tmp != NFS4_DEVICEID4_SIZE + 4))) { | |
324 | status = htonl(NFS4ERR_INVAL); | |
325 | goto err; | |
326 | } | |
327 | dev->cbd_layout_type = ntohl(*p++); | |
328 | memcpy(dev->cbd_dev_id.data, p, NFS4_DEVICEID4_SIZE); | |
329 | p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE); | |
330 | ||
331 | if (dev->cbd_layout_type == NOTIFY_DEVICEID4_CHANGE) { | |
332 | p = read_buf(xdr, sizeof(uint32_t)); | |
333 | if (unlikely(p == NULL)) { | |
334 | status = htonl(NFS4ERR_BADXDR); | |
335 | goto err; | |
336 | } | |
337 | dev->cbd_immediate = ntohl(*p++); | |
338 | } else { | |
339 | dev->cbd_immediate = 0; | |
340 | } | |
341 | ||
342 | args->ndevs++; | |
343 | ||
344 | dprintk("%s: type %d layout 0x%x immediate %d\n", | |
345 | __func__, dev->cbd_notify_type, dev->cbd_layout_type, | |
346 | dev->cbd_immediate); | |
347 | } | |
348 | out: | |
349 | dprintk("%s: status %d ndevs %d\n", | |
350 | __func__, ntohl(status), args->ndevs); | |
351 | return status; | |
352 | err: | |
353 | kfree(args->devs); | |
354 | goto out; | |
355 | } | |
356 | ||
9733f0d9 | 357 | static __be32 decode_sessionid(struct xdr_stream *xdr, |
4aece6a1 BH |
358 | struct nfs4_sessionid *sid) |
359 | { | |
9733f0d9 | 360 | __be32 *p; |
4aece6a1 | 361 | |
590184a6 | 362 | p = read_buf(xdr, NFS4_MAX_SESSIONID_LEN); |
4aece6a1 | 363 | if (unlikely(p == NULL)) |
a419aef8 | 364 | return htonl(NFS4ERR_RESOURCE); |
4aece6a1 | 365 | |
590184a6 | 366 | memcpy(sid->data, p, NFS4_MAX_SESSIONID_LEN); |
4aece6a1 BH |
367 | return 0; |
368 | } | |
369 | ||
9733f0d9 | 370 | static __be32 decode_rc_list(struct xdr_stream *xdr, |
4aece6a1 BH |
371 | struct referring_call_list *rc_list) |
372 | { | |
9733f0d9 | 373 | __be32 *p; |
4aece6a1 | 374 | int i; |
9733f0d9 | 375 | __be32 status; |
4aece6a1 BH |
376 | |
377 | status = decode_sessionid(xdr, &rc_list->rcl_sessionid); | |
378 | if (status) | |
379 | goto out; | |
380 | ||
381 | status = htonl(NFS4ERR_RESOURCE); | |
382 | p = read_buf(xdr, sizeof(uint32_t)); | |
383 | if (unlikely(p == NULL)) | |
384 | goto out; | |
385 | ||
386 | rc_list->rcl_nrefcalls = ntohl(*p++); | |
387 | if (rc_list->rcl_nrefcalls) { | |
388 | p = read_buf(xdr, | |
389 | rc_list->rcl_nrefcalls * 2 * sizeof(uint32_t)); | |
390 | if (unlikely(p == NULL)) | |
391 | goto out; | |
a4f743a6 | 392 | rc_list->rcl_refcalls = kmalloc_array(rc_list->rcl_nrefcalls, |
4aece6a1 BH |
393 | sizeof(*rc_list->rcl_refcalls), |
394 | GFP_KERNEL); | |
395 | if (unlikely(rc_list->rcl_refcalls == NULL)) | |
396 | goto out; | |
397 | for (i = 0; i < rc_list->rcl_nrefcalls; i++) { | |
398 | rc_list->rcl_refcalls[i].rc_sequenceid = ntohl(*p++); | |
399 | rc_list->rcl_refcalls[i].rc_slotid = ntohl(*p++); | |
400 | } | |
401 | } | |
402 | status = 0; | |
403 | ||
404 | out: | |
405 | return status; | |
406 | } | |
407 | ||
9733f0d9 | 408 | static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp, |
4aece6a1 | 409 | struct xdr_stream *xdr, |
f4dac4ad | 410 | void *argp) |
4aece6a1 | 411 | { |
f4dac4ad | 412 | struct cb_sequenceargs *args = argp; |
9733f0d9 | 413 | __be32 *p; |
4aece6a1 | 414 | int i; |
9733f0d9 | 415 | __be32 status; |
4aece6a1 BH |
416 | |
417 | status = decode_sessionid(xdr, &args->csa_sessionid); | |
418 | if (status) | |
1796549a | 419 | return status; |
4aece6a1 | 420 | |
4aece6a1 BH |
421 | p = read_buf(xdr, 5 * sizeof(uint32_t)); |
422 | if (unlikely(p == NULL)) | |
1796549a | 423 | return htonl(NFS4ERR_RESOURCE); |
4aece6a1 | 424 | |
65fc64e5 | 425 | args->csa_addr = svc_addr(rqstp); |
4aece6a1 BH |
426 | args->csa_sequenceid = ntohl(*p++); |
427 | args->csa_slotid = ntohl(*p++); | |
428 | args->csa_highestslotid = ntohl(*p++); | |
429 | args->csa_cachethis = ntohl(*p++); | |
430 | args->csa_nrclists = ntohl(*p++); | |
431 | args->csa_rclists = NULL; | |
432 | if (args->csa_nrclists) { | |
0439f31c DC |
433 | args->csa_rclists = kmalloc_array(args->csa_nrclists, |
434 | sizeof(*args->csa_rclists), | |
435 | GFP_KERNEL); | |
4aece6a1 | 436 | if (unlikely(args->csa_rclists == NULL)) |
1796549a | 437 | return htonl(NFS4ERR_RESOURCE); |
4aece6a1 BH |
438 | |
439 | for (i = 0; i < args->csa_nrclists; i++) { | |
440 | status = decode_rc_list(xdr, &args->csa_rclists[i]); | |
d8ba1f97 TM |
441 | if (status) { |
442 | args->csa_nrclists = i; | |
4aece6a1 | 443 | goto out_free; |
d8ba1f97 | 444 | } |
4aece6a1 BH |
445 | } |
446 | } | |
1796549a | 447 | return 0; |
4aece6a1 BH |
448 | |
449 | out_free: | |
450 | for (i = 0; i < args->csa_nrclists; i++) | |
451 | kfree(args->csa_rclists[i].rcl_refcalls); | |
452 | kfree(args->csa_rclists); | |
1796549a | 453 | return status; |
4aece6a1 BH |
454 | } |
455 | ||
9733f0d9 | 456 | static __be32 decode_recallany_args(struct svc_rqst *rqstp, |
31f09607 | 457 | struct xdr_stream *xdr, |
f4dac4ad | 458 | void *argp) |
31f09607 | 459 | { |
f4dac4ad | 460 | struct cb_recallanyargs *args = argp; |
d743c3c9 PT |
461 | uint32_t bitmap[2]; |
462 | __be32 *p, status; | |
31f09607 | 463 | |
31f09607 AB |
464 | p = read_buf(xdr, 4); |
465 | if (unlikely(p == NULL)) | |
466 | return htonl(NFS4ERR_BADXDR); | |
467 | args->craa_objs_to_keep = ntohl(*p++); | |
d743c3c9 PT |
468 | status = decode_bitmap(xdr, bitmap); |
469 | if (unlikely(status)) | |
470 | return status; | |
471 | args->craa_type_mask = bitmap[0]; | |
31f09607 AB |
472 | |
473 | return 0; | |
474 | } | |
475 | ||
9733f0d9 | 476 | static __be32 decode_recallslot_args(struct svc_rqst *rqstp, |
b9efa1b2 | 477 | struct xdr_stream *xdr, |
f4dac4ad | 478 | void *argp) |
b9efa1b2 | 479 | { |
f4dac4ad | 480 | struct cb_recallslotargs *args = argp; |
b9efa1b2 AA |
481 | __be32 *p; |
482 | ||
b9efa1b2 AA |
483 | p = read_buf(xdr, 4); |
484 | if (unlikely(p == NULL)) | |
485 | return htonl(NFS4ERR_BADXDR); | |
d5fb4ce3 | 486 | args->crsa_target_highest_slotid = ntohl(*p++); |
b9efa1b2 AA |
487 | return 0; |
488 | } | |
489 | ||
db783688 JL |
490 | static __be32 decode_lockowner(struct xdr_stream *xdr, struct cb_notify_lock_args *args) |
491 | { | |
492 | __be32 *p; | |
493 | unsigned int len; | |
494 | ||
495 | p = read_buf(xdr, 12); | |
496 | if (unlikely(p == NULL)) | |
497 | return htonl(NFS4ERR_BADXDR); | |
498 | ||
499 | p = xdr_decode_hyper(p, &args->cbnl_owner.clientid); | |
500 | len = be32_to_cpu(*p); | |
501 | ||
502 | p = read_buf(xdr, len); | |
503 | if (unlikely(p == NULL)) | |
504 | return htonl(NFS4ERR_BADXDR); | |
505 | ||
506 | /* Only try to decode if the length is right */ | |
507 | if (len == 20) { | |
508 | p += 2; /* skip "lock id:" */ | |
509 | args->cbnl_owner.s_dev = be32_to_cpu(*p++); | |
510 | xdr_decode_hyper(p, &args->cbnl_owner.id); | |
511 | args->cbnl_valid = true; | |
512 | } else { | |
513 | args->cbnl_owner.s_dev = 0; | |
514 | args->cbnl_owner.id = 0; | |
515 | args->cbnl_valid = false; | |
516 | } | |
517 | return 0; | |
518 | } | |
519 | ||
f4dac4ad CH |
520 | static __be32 decode_notify_lock_args(struct svc_rqst *rqstp, |
521 | struct xdr_stream *xdr, void *argp) | |
db783688 | 522 | { |
f4dac4ad | 523 | struct cb_notify_lock_args *args = argp; |
db783688 JL |
524 | __be32 status; |
525 | ||
526 | status = decode_fh(xdr, &args->cbnl_fh); | |
527 | if (unlikely(status != 0)) | |
535ece2b AS |
528 | return status; |
529 | return decode_lockowner(xdr, args); | |
db783688 JL |
530 | } |
531 | ||
4aece6a1 | 532 | #endif /* CONFIG_NFS_V4_1 */ |
5178a125 OK |
533 | #ifdef CONFIG_NFS_V4_2 |
534 | static __be32 decode_write_response(struct xdr_stream *xdr, | |
535 | struct cb_offloadargs *args) | |
536 | { | |
537 | __be32 *p; | |
538 | ||
539 | /* skip the always zero field */ | |
540 | p = read_buf(xdr, 4); | |
541 | if (unlikely(!p)) | |
542 | goto out; | |
543 | p++; | |
544 | ||
545 | /* decode count, stable_how, verifier */ | |
546 | p = xdr_inline_decode(xdr, 8 + 4); | |
547 | if (unlikely(!p)) | |
548 | goto out; | |
549 | p = xdr_decode_hyper(p, &args->wr_count); | |
550 | args->wr_writeverf.committed = be32_to_cpup(p); | |
551 | p = xdr_inline_decode(xdr, NFS4_VERIFIER_SIZE); | |
552 | if (likely(p)) { | |
553 | memcpy(&args->wr_writeverf.verifier.data[0], p, | |
554 | NFS4_VERIFIER_SIZE); | |
555 | return 0; | |
556 | } | |
557 | out: | |
558 | return htonl(NFS4ERR_RESOURCE); | |
559 | } | |
560 | ||
561 | static __be32 decode_offload_args(struct svc_rqst *rqstp, | |
562 | struct xdr_stream *xdr, | |
563 | void *data) | |
564 | { | |
565 | struct cb_offloadargs *args = data; | |
566 | __be32 *p; | |
567 | __be32 status; | |
568 | ||
569 | /* decode fh */ | |
570 | status = decode_fh(xdr, &args->coa_fh); | |
571 | if (unlikely(status != 0)) | |
572 | return status; | |
573 | ||
574 | /* decode stateid */ | |
575 | status = decode_stateid(xdr, &args->coa_stateid); | |
576 | if (unlikely(status != 0)) | |
577 | return status; | |
4aece6a1 | 578 | |
5178a125 OK |
579 | /* decode status */ |
580 | p = read_buf(xdr, 4); | |
581 | if (unlikely(!p)) | |
582 | goto out; | |
583 | args->error = ntohl(*p++); | |
584 | if (!args->error) { | |
585 | status = decode_write_response(xdr, args); | |
586 | if (unlikely(status != 0)) | |
587 | return status; | |
588 | } else { | |
589 | p = xdr_inline_decode(xdr, 8); | |
590 | if (unlikely(!p)) | |
591 | goto out; | |
592 | p = xdr_decode_hyper(p, &args->wr_count); | |
593 | } | |
594 | return 0; | |
595 | out: | |
596 | return htonl(NFS4ERR_RESOURCE); | |
597 | } | |
598 | #endif /* CONFIG_NFS_V4_2 */ | |
e6f684f6 | 599 | static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str) |
1da177e4 | 600 | { |
ab6e9aaf TM |
601 | if (unlikely(xdr_stream_encode_opaque(xdr, str, len) < 0)) |
602 | return cpu_to_be32(NFS4ERR_RESOURCE); | |
1da177e4 LT |
603 | return 0; |
604 | } | |
605 | ||
8b064946 | 606 | static __be32 encode_attr_bitmap(struct xdr_stream *xdr, const uint32_t *bitmap, size_t sz) |
1da177e4 | 607 | { |
8b064946 TM |
608 | if (xdr_stream_encode_uint32_array(xdr, bitmap, sz) < 0) |
609 | return cpu_to_be32(NFS4ERR_RESOURCE); | |
1da177e4 LT |
610 | return 0; |
611 | } | |
612 | ||
e6f684f6 | 613 | static __be32 encode_attr_change(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t change) |
1da177e4 | 614 | { |
5704fdeb | 615 | __be32 *p; |
1da177e4 LT |
616 | |
617 | if (!(bitmap[0] & FATTR4_WORD0_CHANGE)) | |
618 | return 0; | |
619 | p = xdr_reserve_space(xdr, 8); | |
90dc7d27 | 620 | if (unlikely(!p)) |
1da177e4 LT |
621 | return htonl(NFS4ERR_RESOURCE); |
622 | p = xdr_encode_hyper(p, change); | |
623 | return 0; | |
624 | } | |
625 | ||
e6f684f6 | 626 | static __be32 encode_attr_size(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t size) |
1da177e4 | 627 | { |
5704fdeb | 628 | __be32 *p; |
1da177e4 LT |
629 | |
630 | if (!(bitmap[0] & FATTR4_WORD0_SIZE)) | |
631 | return 0; | |
632 | p = xdr_reserve_space(xdr, 8); | |
90dc7d27 | 633 | if (unlikely(!p)) |
1da177e4 LT |
634 | return htonl(NFS4ERR_RESOURCE); |
635 | p = xdr_encode_hyper(p, size); | |
636 | return 0; | |
637 | } | |
638 | ||
e6f684f6 | 639 | static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec *time) |
1da177e4 | 640 | { |
5704fdeb | 641 | __be32 *p; |
1da177e4 LT |
642 | |
643 | p = xdr_reserve_space(xdr, 12); | |
90dc7d27 | 644 | if (unlikely(!p)) |
1da177e4 LT |
645 | return htonl(NFS4ERR_RESOURCE); |
646 | p = xdr_encode_hyper(p, time->tv_sec); | |
647 | *p = htonl(time->tv_nsec); | |
648 | return 0; | |
649 | } | |
650 | ||
e6f684f6 | 651 | static __be32 encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) |
1da177e4 LT |
652 | { |
653 | if (!(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) | |
654 | return 0; | |
655 | return encode_attr_time(xdr,time); | |
656 | } | |
657 | ||
e6f684f6 | 658 | static __be32 encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) |
1da177e4 LT |
659 | { |
660 | if (!(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) | |
661 | return 0; | |
662 | return encode_attr_time(xdr,time); | |
663 | } | |
664 | ||
e6f684f6 | 665 | static __be32 encode_compound_hdr_res(struct xdr_stream *xdr, struct cb_compound_hdr_res *hdr) |
1da177e4 | 666 | { |
e6f684f6 | 667 | __be32 status; |
1da177e4 LT |
668 | |
669 | hdr->status = xdr_reserve_space(xdr, 4); | |
670 | if (unlikely(hdr->status == NULL)) | |
671 | return htonl(NFS4ERR_RESOURCE); | |
672 | status = encode_string(xdr, hdr->taglen, hdr->tag); | |
673 | if (unlikely(status != 0)) | |
674 | return status; | |
675 | hdr->nops = xdr_reserve_space(xdr, 4); | |
676 | if (unlikely(hdr->nops == NULL)) | |
677 | return htonl(NFS4ERR_RESOURCE); | |
678 | return 0; | |
679 | } | |
680 | ||
e6f684f6 | 681 | static __be32 encode_op_hdr(struct xdr_stream *xdr, uint32_t op, __be32 res) |
1da177e4 | 682 | { |
5704fdeb | 683 | __be32 *p; |
1da177e4 LT |
684 | |
685 | p = xdr_reserve_space(xdr, 8); | |
686 | if (unlikely(p == NULL)) | |
31d2b435 | 687 | return htonl(NFS4ERR_RESOURCE_HDR); |
1da177e4 LT |
688 | *p++ = htonl(op); |
689 | *p = res; | |
690 | return 0; | |
691 | } | |
692 | ||
f4dac4ad CH |
693 | static __be32 encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr, |
694 | const void *resp) | |
1da177e4 | 695 | { |
f4dac4ad | 696 | const struct cb_getattrres *res = resp; |
5704fdeb | 697 | __be32 *savep = NULL; |
e6f684f6 | 698 | __be32 status = res->status; |
1da177e4 LT |
699 | |
700 | if (unlikely(status != 0)) | |
701 | goto out; | |
8b064946 | 702 | status = encode_attr_bitmap(xdr, res->bitmap, ARRAY_SIZE(res->bitmap)); |
1da177e4 LT |
703 | if (unlikely(status != 0)) |
704 | goto out; | |
8b064946 TM |
705 | status = cpu_to_be32(NFS4ERR_RESOURCE); |
706 | savep = xdr_reserve_space(xdr, sizeof(*savep)); | |
707 | if (unlikely(!savep)) | |
708 | goto out; | |
1da177e4 LT |
709 | status = encode_attr_change(xdr, res->bitmap, res->change_attr); |
710 | if (unlikely(status != 0)) | |
711 | goto out; | |
712 | status = encode_attr_size(xdr, res->bitmap, res->size); | |
713 | if (unlikely(status != 0)) | |
714 | goto out; | |
715 | status = encode_attr_ctime(xdr, res->bitmap, &res->ctime); | |
716 | if (unlikely(status != 0)) | |
717 | goto out; | |
718 | status = encode_attr_mtime(xdr, res->bitmap, &res->mtime); | |
719 | *savep = htonl((unsigned int)((char *)xdr->p - (char *)(savep+1))); | |
720 | out: | |
1da177e4 LT |
721 | return status; |
722 | } | |
723 | ||
34bc47c9 BH |
724 | #if defined(CONFIG_NFS_V4_1) |
725 | ||
9733f0d9 | 726 | static __be32 encode_sessionid(struct xdr_stream *xdr, |
4aece6a1 BH |
727 | const struct nfs4_sessionid *sid) |
728 | { | |
9733f0d9 | 729 | __be32 *p; |
4aece6a1 | 730 | |
590184a6 | 731 | p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN); |
4aece6a1 BH |
732 | if (unlikely(p == NULL)) |
733 | return htonl(NFS4ERR_RESOURCE); | |
734 | ||
590184a6 | 735 | memcpy(p, sid, NFS4_MAX_SESSIONID_LEN); |
4aece6a1 BH |
736 | return 0; |
737 | } | |
738 | ||
9733f0d9 | 739 | static __be32 encode_cb_sequence_res(struct svc_rqst *rqstp, |
4aece6a1 | 740 | struct xdr_stream *xdr, |
f4dac4ad | 741 | const void *resp) |
4aece6a1 | 742 | { |
f4dac4ad | 743 | const struct cb_sequenceres *res = resp; |
9733f0d9 | 744 | __be32 *p; |
e216c8c7 | 745 | __be32 status = res->csr_status; |
4aece6a1 BH |
746 | |
747 | if (unlikely(status != 0)) | |
3d0bfaa6 | 748 | return status; |
4aece6a1 | 749 | |
e0a63c0b KM |
750 | status = encode_sessionid(xdr, &res->csr_sessionid); |
751 | if (status) | |
3d0bfaa6 | 752 | return status; |
4aece6a1 BH |
753 | |
754 | p = xdr_reserve_space(xdr, 4 * sizeof(uint32_t)); | |
755 | if (unlikely(p == NULL)) | |
756 | return htonl(NFS4ERR_RESOURCE); | |
757 | ||
758 | *p++ = htonl(res->csr_sequenceid); | |
759 | *p++ = htonl(res->csr_slotid); | |
760 | *p++ = htonl(res->csr_highestslotid); | |
761 | *p++ = htonl(res->csr_target_highestslotid); | |
3d0bfaa6 | 762 | return 0; |
4aece6a1 BH |
763 | } |
764 | ||
34bc47c9 BH |
765 | static __be32 |
766 | preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) | |
767 | { | |
281fe15d BH |
768 | if (op_nr == OP_CB_SEQUENCE) { |
769 | if (nop != 0) | |
770 | return htonl(NFS4ERR_SEQUENCE_POS); | |
771 | } else { | |
772 | if (nop == 0) | |
773 | return htonl(NFS4ERR_OP_NOT_IN_SESSION); | |
774 | } | |
775 | ||
34bc47c9 BH |
776 | switch (op_nr) { |
777 | case OP_CB_GETATTR: | |
778 | case OP_CB_RECALL: | |
4aece6a1 | 779 | case OP_CB_SEQUENCE: |
31f09607 | 780 | case OP_CB_RECALL_ANY: |
b9efa1b2 | 781 | case OP_CB_RECALL_SLOT: |
f2a62561 | 782 | case OP_CB_LAYOUTRECALL: |
1be5683b | 783 | case OP_CB_NOTIFY_DEVICEID: |
db783688 | 784 | case OP_CB_NOTIFY_LOCK: |
34bc47c9 BH |
785 | *op = &callback_ops[op_nr]; |
786 | break; | |
787 | ||
34bc47c9 BH |
788 | case OP_CB_NOTIFY: |
789 | case OP_CB_PUSH_DELEG: | |
34bc47c9 | 790 | case OP_CB_RECALLABLE_OBJ_AVAIL: |
34bc47c9 | 791 | case OP_CB_WANTS_CANCELLED: |
34bc47c9 BH |
792 | return htonl(NFS4ERR_NOTSUPP); |
793 | ||
794 | default: | |
795 | return htonl(NFS4ERR_OP_ILLEGAL); | |
796 | } | |
797 | ||
798 | return htonl(NFS_OK); | |
799 | } | |
800 | ||
810d82e6 TM |
801 | static void nfs4_callback_free_slot(struct nfs4_session *session, |
802 | struct nfs4_slot *slot) | |
42acd021 AA |
803 | { |
804 | struct nfs4_slot_table *tbl = &session->bc_slot_table; | |
805 | ||
806 | spin_lock(&tbl->slot_tbl_lock); | |
807 | /* | |
808 | * Let the state manager know callback processing done. | |
809 | * A single slot, so highest used slotid is either 0 or -1 | |
810 | */ | |
810d82e6 | 811 | nfs4_free_slot(tbl, slot); |
42acd021 AA |
812 | spin_unlock(&tbl->slot_tbl_lock); |
813 | } | |
814 | ||
55a67399 | 815 | static void nfs4_cb_free_slot(struct cb_process_state *cps) |
42acd021 | 816 | { |
810d82e6 TM |
817 | if (cps->slot) { |
818 | nfs4_callback_free_slot(cps->clp->cl_session, cps->slot); | |
819 | cps->slot = NULL; | |
820 | } | |
42acd021 AA |
821 | } |
822 | ||
34bc47c9 BH |
823 | #else /* CONFIG_NFS_V4_1 */ |
824 | ||
825 | static __be32 | |
826 | preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) | |
827 | { | |
828 | return htonl(NFS4ERR_MINOR_VERS_MISMATCH); | |
829 | } | |
830 | ||
55a67399 | 831 | static void nfs4_cb_free_slot(struct cb_process_state *cps) |
42acd021 AA |
832 | { |
833 | } | |
34bc47c9 BH |
834 | #endif /* CONFIG_NFS_V4_1 */ |
835 | ||
6b140b85 BS |
836 | #ifdef CONFIG_NFS_V4_2 |
837 | static __be32 | |
838 | preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op) | |
839 | { | |
840 | __be32 status = preprocess_nfs41_op(nop, op_nr, op); | |
841 | if (status != htonl(NFS4ERR_OP_ILLEGAL)) | |
842 | return status; | |
843 | ||
5178a125 OK |
844 | if (op_nr == OP_CB_OFFLOAD) { |
845 | *op = &callback_ops[op_nr]; | |
846 | return htonl(NFS_OK); | |
847 | } else | |
6b140b85 BS |
848 | return htonl(NFS4ERR_NOTSUPP); |
849 | return htonl(NFS4ERR_OP_ILLEGAL); | |
850 | } | |
851 | #else /* CONFIG_NFS_V4_2 */ | |
852 | static __be32 | |
853 | preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op) | |
854 | { | |
855 | return htonl(NFS4ERR_MINOR_VERS_MISMATCH); | |
856 | } | |
857 | #endif /* CONFIG_NFS_V4_2 */ | |
858 | ||
34bc47c9 BH |
859 | static __be32 |
860 | preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op) | |
861 | { | |
862 | switch (op_nr) { | |
863 | case OP_CB_GETATTR: | |
864 | case OP_CB_RECALL: | |
865 | *op = &callback_ops[op_nr]; | |
866 | break; | |
867 | default: | |
868 | return htonl(NFS4ERR_OP_ILLEGAL); | |
869 | } | |
870 | ||
871 | return htonl(NFS_OK); | |
872 | } | |
873 | ||
459de2ed | 874 | static __be32 process_op(int nop, struct svc_rqst *rqstp, |
1da177e4 | 875 | struct xdr_stream *xdr_in, void *argp, |
c36fca52 AA |
876 | struct xdr_stream *xdr_out, void *resp, |
877 | struct cb_process_state *cps) | |
1da177e4 | 878 | { |
a162a6b8 | 879 | struct callback_op *op = &callback_ops[0]; |
31d2b435 | 880 | unsigned int op_nr; |
34bc47c9 | 881 | __be32 status; |
1da177e4 | 882 | long maxlen; |
e6f684f6 | 883 | __be32 res; |
1da177e4 | 884 | |
1da177e4 | 885 | status = decode_op_hdr(xdr_in, &op_nr); |
31d2b435 AA |
886 | if (unlikely(status)) |
887 | return status; | |
1da177e4 | 888 | |
6b140b85 BS |
889 | switch (cps->minorversion) { |
890 | case 0: | |
891 | status = preprocess_nfs4_op(op_nr, &op); | |
892 | break; | |
893 | case 1: | |
894 | status = preprocess_nfs41_op(nop, op_nr, &op); | |
895 | break; | |
896 | case 2: | |
897 | status = preprocess_nfs42_op(nop, op_nr, &op); | |
898 | break; | |
899 | default: | |
900 | status = htonl(NFS4ERR_MINOR_VERS_MISMATCH); | |
901 | } | |
34bc47c9 | 902 | |
34bc47c9 BH |
903 | if (status == htonl(NFS4ERR_OP_ILLEGAL)) |
904 | op_nr = OP_CB_ILLEGAL; | |
b92b3019 AA |
905 | if (status) |
906 | goto encode_hdr; | |
31d2b435 | 907 | |
c36fca52 AA |
908 | if (cps->drc_status) { |
909 | status = cps->drc_status; | |
4911096f AA |
910 | goto encode_hdr; |
911 | } | |
912 | ||
1da177e4 LT |
913 | maxlen = xdr_out->end - xdr_out->p; |
914 | if (maxlen > 0 && maxlen < PAGE_SIZE) { | |
e95e60da AA |
915 | status = op->decode_args(rqstp, xdr_in, argp); |
916 | if (likely(status == 0)) | |
c36fca52 | 917 | status = op->process_op(argp, resp, cps); |
1da177e4 LT |
918 | } else |
919 | status = htonl(NFS4ERR_RESOURCE); | |
920 | ||
b92b3019 | 921 | encode_hdr: |
1da177e4 | 922 | res = encode_op_hdr(xdr_out, op_nr, status); |
31d2b435 AA |
923 | if (unlikely(res)) |
924 | return res; | |
1da177e4 LT |
925 | if (op->encode_res != NULL && status == 0) |
926 | status = op->encode_res(rqstp, xdr_out, resp); | |
1da177e4 LT |
927 | return status; |
928 | } | |
929 | ||
930 | /* | |
931 | * Decode, process and encode a COMPOUND | |
932 | */ | |
a6beb732 | 933 | static __be32 nfs4_callback_compound(struct svc_rqst *rqstp) |
1da177e4 | 934 | { |
3a6258e1 TM |
935 | struct cb_compound_hdr_arg hdr_arg = { 0 }; |
936 | struct cb_compound_hdr_res hdr_res = { NULL }; | |
1da177e4 | 937 | struct xdr_stream xdr_in, xdr_out; |
c36fca52 AA |
938 | __be32 *p, status; |
939 | struct cb_process_state cps = { | |
940 | .drc_status = 0, | |
941 | .clp = NULL, | |
9695c705 | 942 | .net = SVC_NET(rqstp), |
c36fca52 | 943 | }; |
3a6258e1 | 944 | unsigned int nops = 0; |
1da177e4 | 945 | |
756b9b37 | 946 | xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base); |
1da177e4 | 947 | |
5704fdeb | 948 | p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len); |
1da177e4 LT |
949 | xdr_init_encode(&xdr_out, &rqstp->rq_res, p); |
950 | ||
3a6258e1 | 951 | status = decode_compound_hdr_arg(&xdr_in, &hdr_arg); |
4ed0d83d | 952 | if (status == htonl(NFS4ERR_RESOURCE)) |
3a6258e1 TM |
953 | return rpc_garbage_args; |
954 | ||
c36fca52 | 955 | if (hdr_arg.minorversion == 0) { |
9695c705 | 956 | cps.clp = nfs4_find_client_ident(SVC_NET(rqstp), hdr_arg.cb_ident); |
32cd3ee5 OK |
957 | if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp)) { |
958 | if (cps.clp) | |
959 | nfs_put_client(cps.clp); | |
a4e187d8 | 960 | goto out_invalidcred; |
32cd3ee5 | 961 | } |
778be232 | 962 | } |
c36fca52 | 963 | |
459de2ed | 964 | cps.minorversion = hdr_arg.minorversion; |
1da177e4 LT |
965 | hdr_res.taglen = hdr_arg.taglen; |
966 | hdr_res.tag = hdr_arg.tag; | |
32cd3ee5 OK |
967 | if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0) { |
968 | if (cps.clp) | |
969 | nfs_put_client(cps.clp); | |
3a6258e1 | 970 | return rpc_system_err; |
32cd3ee5 | 971 | } |
3a6258e1 | 972 | while (status == 0 && nops != hdr_arg.nops) { |
459de2ed | 973 | status = process_op(nops, rqstp, &xdr_in, |
a6beb732 CH |
974 | rqstp->rq_argp, &xdr_out, rqstp->rq_resp, |
975 | &cps); | |
1da177e4 LT |
976 | nops++; |
977 | } | |
3a6258e1 | 978 | |
31d2b435 AA |
979 | /* Buffer overflow in decode_ops_hdr or encode_ops_hdr. Return |
980 | * resource error in cb_compound status without returning op */ | |
981 | if (unlikely(status == htonl(NFS4ERR_RESOURCE_HDR))) { | |
982 | status = htonl(NFS4ERR_RESOURCE); | |
983 | nops--; | |
984 | } | |
985 | ||
1da177e4 LT |
986 | *hdr_res.status = status; |
987 | *hdr_res.nops = htonl(nops); | |
55a67399 | 988 | nfs4_cb_free_slot(&cps); |
c36fca52 | 989 | nfs_put_client(cps.clp); |
1da177e4 | 990 | return rpc_success; |
a4e187d8 CL |
991 | |
992 | out_invalidcred: | |
993 | pr_warn_ratelimited("NFS: NFSv4 callback contains invalid cred\n"); | |
994 | return rpc_autherr_badcred; | |
1da177e4 LT |
995 | } |
996 | ||
997 | /* | |
998 | * Define NFS4 callback COMPOUND ops. | |
999 | */ | |
1000 | static struct callback_op callback_ops[] = { | |
1001 | [0] = { | |
1002 | .res_maxsize = CB_OP_HDR_RES_MAXSZ, | |
1003 | }, | |
1004 | [OP_CB_GETATTR] = { | |
f4dac4ad CH |
1005 | .process_op = nfs4_callback_getattr, |
1006 | .decode_args = decode_getattr_args, | |
1007 | .encode_res = encode_getattr_res, | |
1da177e4 LT |
1008 | .res_maxsize = CB_OP_GETATTR_RES_MAXSZ, |
1009 | }, | |
1010 | [OP_CB_RECALL] = { | |
f4dac4ad CH |
1011 | .process_op = nfs4_callback_recall, |
1012 | .decode_args = decode_recall_args, | |
1da177e4 | 1013 | .res_maxsize = CB_OP_RECALL_RES_MAXSZ, |
4aece6a1 BH |
1014 | }, |
1015 | #if defined(CONFIG_NFS_V4_1) | |
f2a62561 | 1016 | [OP_CB_LAYOUTRECALL] = { |
f4dac4ad CH |
1017 | .process_op = nfs4_callback_layoutrecall, |
1018 | .decode_args = decode_layoutrecall_args, | |
f2a62561 FI |
1019 | .res_maxsize = CB_OP_LAYOUTRECALL_RES_MAXSZ, |
1020 | }, | |
1be5683b | 1021 | [OP_CB_NOTIFY_DEVICEID] = { |
f4dac4ad CH |
1022 | .process_op = nfs4_callback_devicenotify, |
1023 | .decode_args = decode_devicenotify_args, | |
1be5683b ME |
1024 | .res_maxsize = CB_OP_DEVICENOTIFY_RES_MAXSZ, |
1025 | }, | |
4aece6a1 | 1026 | [OP_CB_SEQUENCE] = { |
f4dac4ad CH |
1027 | .process_op = nfs4_callback_sequence, |
1028 | .decode_args = decode_cb_sequence_args, | |
1029 | .encode_res = encode_cb_sequence_res, | |
4aece6a1 BH |
1030 | .res_maxsize = CB_OP_SEQUENCE_RES_MAXSZ, |
1031 | }, | |
31f09607 | 1032 | [OP_CB_RECALL_ANY] = { |
f4dac4ad CH |
1033 | .process_op = nfs4_callback_recallany, |
1034 | .decode_args = decode_recallany_args, | |
31f09607 AB |
1035 | .res_maxsize = CB_OP_RECALLANY_RES_MAXSZ, |
1036 | }, | |
b9efa1b2 | 1037 | [OP_CB_RECALL_SLOT] = { |
f4dac4ad CH |
1038 | .process_op = nfs4_callback_recallslot, |
1039 | .decode_args = decode_recallslot_args, | |
b9efa1b2 AA |
1040 | .res_maxsize = CB_OP_RECALLSLOT_RES_MAXSZ, |
1041 | }, | |
db783688 | 1042 | [OP_CB_NOTIFY_LOCK] = { |
f4dac4ad CH |
1043 | .process_op = nfs4_callback_notify_lock, |
1044 | .decode_args = decode_notify_lock_args, | |
db783688 JL |
1045 | .res_maxsize = CB_OP_NOTIFY_LOCK_RES_MAXSZ, |
1046 | }, | |
4aece6a1 | 1047 | #endif /* CONFIG_NFS_V4_1 */ |
5178a125 OK |
1048 | #ifdef CONFIG_NFS_V4_2 |
1049 | [OP_CB_OFFLOAD] = { | |
1050 | .process_op = nfs4_callback_offload, | |
1051 | .decode_args = decode_offload_args, | |
1052 | .res_maxsize = CB_OP_OFFLOAD_RES_MAXSZ, | |
1053 | }, | |
1054 | #endif /* CONFIG_NFS_V4_2 */ | |
1da177e4 LT |
1055 | }; |
1056 | ||
1057 | /* | |
1058 | * Define NFS4 callback procedures | |
1059 | */ | |
860bda29 | 1060 | static const struct svc_procedure nfs4_callback_procedures1[] = { |
1da177e4 LT |
1061 | [CB_NULL] = { |
1062 | .pc_func = nfs4_callback_null, | |
026fec7e | 1063 | .pc_decode = nfs4_decode_void, |
63f8de37 | 1064 | .pc_encode = nfs4_encode_void, |
1da177e4 LT |
1065 | .pc_xdrressize = 1, |
1066 | }, | |
1067 | [CB_COMPOUND] = { | |
1068 | .pc_func = nfs4_callback_compound, | |
63f8de37 | 1069 | .pc_encode = nfs4_encode_void, |
1da177e4 LT |
1070 | .pc_argsize = 256, |
1071 | .pc_ressize = 256, | |
1072 | .pc_xdrressize = NFS4_CALLBACK_BUFSIZE, | |
1073 | } | |
1074 | }; | |
1075 | ||
7fd38af9 | 1076 | static unsigned int nfs4_callback_count1[ARRAY_SIZE(nfs4_callback_procedures1)]; |
e9679189 | 1077 | const struct svc_version nfs4_callback_version1 = { |
1da177e4 LT |
1078 | .vs_vers = 1, |
1079 | .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), | |
1080 | .vs_proc = nfs4_callback_procedures1, | |
7fd38af9 | 1081 | .vs_count = nfs4_callback_count1, |
1da177e4 LT |
1082 | .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, |
1083 | .vs_dispatch = NULL, | |
05a45a2d | 1084 | .vs_hidden = true, |
5283b03e | 1085 | .vs_need_cong_ctrl = true, |
1da177e4 LT |
1086 | }; |
1087 | ||
7fd38af9 | 1088 | static unsigned int nfs4_callback_count4[ARRAY_SIZE(nfs4_callback_procedures1)]; |
e9679189 | 1089 | const struct svc_version nfs4_callback_version4 = { |
07bccc2d AB |
1090 | .vs_vers = 4, |
1091 | .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), | |
1092 | .vs_proc = nfs4_callback_procedures1, | |
7fd38af9 | 1093 | .vs_count = nfs4_callback_count4, |
07bccc2d AB |
1094 | .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, |
1095 | .vs_dispatch = NULL, | |
05a45a2d | 1096 | .vs_hidden = true, |
5283b03e | 1097 | .vs_need_cong_ctrl = true, |
07bccc2d | 1098 | }; |