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 | ||
c065eeea TM |
75 | static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len, |
76 | const char **str, size_t maxlen) | |
1da177e4 | 77 | { |
c065eeea | 78 | ssize_t err; |
1da177e4 | 79 | |
c065eeea TM |
80 | err = xdr_stream_decode_opaque_inline(xdr, (void **)str, maxlen); |
81 | if (err < 0) | |
82 | return cpu_to_be32(NFS4ERR_RESOURCE); | |
83 | *len = err; | |
1da177e4 LT |
84 | return 0; |
85 | } | |
86 | ||
e6f684f6 | 87 | static __be32 decode_fh(struct xdr_stream *xdr, struct nfs_fh *fh) |
1da177e4 | 88 | { |
5704fdeb | 89 | __be32 *p; |
1da177e4 | 90 | |
eb72f484 | 91 | p = xdr_inline_decode(xdr, 4); |
1da177e4 LT |
92 | if (unlikely(p == NULL)) |
93 | return htonl(NFS4ERR_RESOURCE); | |
94 | fh->size = ntohl(*p); | |
95 | if (fh->size > NFS4_FHSIZE) | |
96 | return htonl(NFS4ERR_BADHANDLE); | |
eb72f484 | 97 | p = xdr_inline_decode(xdr, fh->size); |
1da177e4 LT |
98 | if (unlikely(p == NULL)) |
99 | return htonl(NFS4ERR_RESOURCE); | |
100 | memcpy(&fh->data[0], p, fh->size); | |
101 | memset(&fh->data[fh->size], 0, sizeof(fh->data) - fh->size); | |
102 | return 0; | |
103 | } | |
104 | ||
e6f684f6 | 105 | static __be32 decode_bitmap(struct xdr_stream *xdr, uint32_t *bitmap) |
1da177e4 | 106 | { |
5704fdeb | 107 | __be32 *p; |
1da177e4 LT |
108 | unsigned int attrlen; |
109 | ||
eb72f484 | 110 | p = xdr_inline_decode(xdr, 4); |
1da177e4 LT |
111 | if (unlikely(p == NULL)) |
112 | return htonl(NFS4ERR_RESOURCE); | |
113 | attrlen = ntohl(*p); | |
eb72f484 | 114 | p = xdr_inline_decode(xdr, attrlen << 2); |
1da177e4 LT |
115 | if (unlikely(p == NULL)) |
116 | return htonl(NFS4ERR_RESOURCE); | |
117 | if (likely(attrlen > 0)) | |
118 | bitmap[0] = ntohl(*p++); | |
119 | if (attrlen > 1) | |
120 | bitmap[1] = ntohl(*p); | |
121 | return 0; | |
122 | } | |
123 | ||
e6f684f6 | 124 | static __be32 decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) |
1da177e4 | 125 | { |
5704fdeb | 126 | __be32 *p; |
1da177e4 | 127 | |
eb72f484 | 128 | p = xdr_inline_decode(xdr, NFS4_STATEID_SIZE); |
1da177e4 LT |
129 | if (unlikely(p == NULL)) |
130 | return htonl(NFS4ERR_RESOURCE); | |
93b717fd | 131 | memcpy(stateid->data, p, NFS4_STATEID_SIZE); |
1da177e4 LT |
132 | return 0; |
133 | } | |
134 | ||
93b717fd TM |
135 | static __be32 decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) |
136 | { | |
137 | stateid->type = NFS4_DELEGATION_STATEID_TYPE; | |
138 | return decode_stateid(xdr, stateid); | |
139 | } | |
140 | ||
e6f684f6 | 141 | static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound_hdr_arg *hdr) |
1da177e4 | 142 | { |
5704fdeb | 143 | __be32 *p; |
e6f684f6 | 144 | __be32 status; |
1da177e4 | 145 | |
c065eeea | 146 | status = decode_string(xdr, &hdr->taglen, &hdr->tag, CB_OP_TAGLEN_MAXSZ); |
1da177e4 LT |
147 | if (unlikely(status != 0)) |
148 | return status; | |
eb72f484 | 149 | p = xdr_inline_decode(xdr, 12); |
1da177e4 LT |
150 | if (unlikely(p == NULL)) |
151 | return htonl(NFS4ERR_RESOURCE); | |
b8f2ef84 | 152 | hdr->minorversion = ntohl(*p++); |
459de2ed BS |
153 | /* Check for minor version support */ |
154 | if (hdr->minorversion <= NFS4_MAX_MINOR_VERSION) { | |
42c2c424 | 155 | hdr->cb_ident = ntohl(*p++); /* ignored by v4.1 and v4.2 */ |
48a9e2d2 | 156 | } else { |
9a3ba432 | 157 | pr_warn_ratelimited("NFS: %s: NFSv4 server callback with " |
b8f2ef84 BH |
158 | "illegal minor version %u!\n", |
159 | __func__, hdr->minorversion); | |
1da177e4 LT |
160 | return htonl(NFS4ERR_MINOR_VERS_MISMATCH); |
161 | } | |
1da177e4 LT |
162 | hdr->nops = ntohl(*p); |
163 | return 0; | |
164 | } | |
165 | ||
e6f684f6 | 166 | static __be32 decode_op_hdr(struct xdr_stream *xdr, unsigned int *op) |
1da177e4 | 167 | { |
5704fdeb | 168 | __be32 *p; |
eb72f484 | 169 | p = xdr_inline_decode(xdr, 4); |
1da177e4 | 170 | if (unlikely(p == NULL)) |
31d2b435 | 171 | return htonl(NFS4ERR_RESOURCE_HDR); |
1da177e4 LT |
172 | *op = ntohl(*p); |
173 | return 0; | |
174 | } | |
175 | ||
f4dac4ad CH |
176 | static __be32 decode_getattr_args(struct svc_rqst *rqstp, |
177 | struct xdr_stream *xdr, void *argp) | |
1da177e4 | 178 | { |
f4dac4ad | 179 | struct cb_getattrargs *args = argp; |
e6f684f6 | 180 | __be32 status; |
1da177e4 LT |
181 | |
182 | status = decode_fh(xdr, &args->fh); | |
183 | if (unlikely(status != 0)) | |
56938bb7 AS |
184 | return status; |
185 | return decode_bitmap(xdr, args->bitmap); | |
1da177e4 LT |
186 | } |
187 | ||
f4dac4ad CH |
188 | static __be32 decode_recall_args(struct svc_rqst *rqstp, |
189 | struct xdr_stream *xdr, void *argp) | |
1da177e4 | 190 | { |
f4dac4ad | 191 | struct cb_recallargs *args = argp; |
5704fdeb | 192 | __be32 *p; |
e6f684f6 | 193 | __be32 status; |
1da177e4 | 194 | |
93b717fd | 195 | status = decode_delegation_stateid(xdr, &args->stateid); |
1da177e4 | 196 | if (unlikely(status != 0)) |
135a4ea0 | 197 | return status; |
eb72f484 | 198 | p = xdr_inline_decode(xdr, 4); |
135a4ea0 AS |
199 | if (unlikely(p == NULL)) |
200 | return htonl(NFS4ERR_RESOURCE); | |
1da177e4 | 201 | args->truncate = ntohl(*p); |
135a4ea0 | 202 | return decode_fh(xdr, &args->fh); |
1da177e4 LT |
203 | } |
204 | ||
4aece6a1 | 205 | #if defined(CONFIG_NFS_V4_1) |
93b717fd TM |
206 | static __be32 decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) |
207 | { | |
208 | stateid->type = NFS4_LAYOUT_STATEID_TYPE; | |
209 | return decode_stateid(xdr, stateid); | |
210 | } | |
4aece6a1 | 211 | |
f2a62561 | 212 | static __be32 decode_layoutrecall_args(struct svc_rqst *rqstp, |
f4dac4ad | 213 | struct xdr_stream *xdr, void *argp) |
f2a62561 | 214 | { |
f4dac4ad | 215 | struct cb_layoutrecallargs *args = argp; |
f2a62561 FI |
216 | __be32 *p; |
217 | __be32 status = 0; | |
218 | uint32_t iomode; | |
219 | ||
eb72f484 | 220 | p = xdr_inline_decode(xdr, 4 * sizeof(uint32_t)); |
c79d56d2 AS |
221 | if (unlikely(p == NULL)) |
222 | return htonl(NFS4ERR_BADXDR); | |
f2a62561 FI |
223 | |
224 | args->cbl_layout_type = ntohl(*p++); | |
225 | /* Depite the spec's xdr, iomode really belongs in the FILE switch, | |
25985edc | 226 | * as it is unusable and ignored with the other types. |
f2a62561 FI |
227 | */ |
228 | iomode = ntohl(*p++); | |
229 | args->cbl_layoutchanged = ntohl(*p++); | |
230 | args->cbl_recall_type = ntohl(*p++); | |
231 | ||
232 | if (args->cbl_recall_type == RETURN_FILE) { | |
233 | args->cbl_range.iomode = iomode; | |
234 | status = decode_fh(xdr, &args->cbl_fh); | |
235 | if (unlikely(status != 0)) | |
c79d56d2 | 236 | return status; |
f2a62561 | 237 | |
eb72f484 | 238 | p = xdr_inline_decode(xdr, 2 * sizeof(uint64_t)); |
c79d56d2 AS |
239 | if (unlikely(p == NULL)) |
240 | return htonl(NFS4ERR_BADXDR); | |
f2a62561 FI |
241 | p = xdr_decode_hyper(p, &args->cbl_range.offset); |
242 | p = xdr_decode_hyper(p, &args->cbl_range.length); | |
c79d56d2 | 243 | return decode_layout_stateid(xdr, &args->cbl_stateid); |
f2a62561 | 244 | } else if (args->cbl_recall_type == RETURN_FSID) { |
eb72f484 | 245 | p = xdr_inline_decode(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_fsid.major); |
249 | p = xdr_decode_hyper(p, &args->cbl_fsid.minor); | |
c79d56d2 AS |
250 | } else if (args->cbl_recall_type != RETURN_ALL) |
251 | return htonl(NFS4ERR_BADXDR); | |
252 | return 0; | |
f2a62561 FI |
253 | } |
254 | ||
1be5683b ME |
255 | static |
256 | __be32 decode_devicenotify_args(struct svc_rqst *rqstp, | |
257 | struct xdr_stream *xdr, | |
f4dac4ad | 258 | void *argp) |
1be5683b | 259 | { |
f4dac4ad | 260 | struct cb_devicenotifyargs *args = argp; |
1be5683b ME |
261 | __be32 *p; |
262 | __be32 status = 0; | |
263 | u32 tmp; | |
264 | int n, i; | |
265 | args->ndevs = 0; | |
266 | ||
267 | /* Num of device notifications */ | |
eb72f484 | 268 | p = xdr_inline_decode(xdr, sizeof(uint32_t)); |
1be5683b ME |
269 | if (unlikely(p == NULL)) { |
270 | status = htonl(NFS4ERR_BADXDR); | |
271 | goto out; | |
272 | } | |
273 | n = ntohl(*p++); | |
274 | if (n <= 0) | |
275 | goto out; | |
363e0df0 DC |
276 | if (n > ULONG_MAX / sizeof(*args->devs)) { |
277 | status = htonl(NFS4ERR_BADXDR); | |
278 | goto out; | |
279 | } | |
1be5683b | 280 | |
a4f743a6 | 281 | args->devs = kmalloc_array(n, sizeof(*args->devs), GFP_KERNEL); |
1be5683b ME |
282 | if (!args->devs) { |
283 | status = htonl(NFS4ERR_DELAY); | |
284 | goto out; | |
285 | } | |
286 | ||
287 | /* Decode each dev notification */ | |
288 | for (i = 0; i < n; i++) { | |
289 | struct cb_devicenotifyitem *dev = &args->devs[i]; | |
290 | ||
eb72f484 CL |
291 | p = xdr_inline_decode(xdr, (4 * sizeof(uint32_t)) + |
292 | NFS4_DEVICEID4_SIZE); | |
1be5683b ME |
293 | if (unlikely(p == NULL)) { |
294 | status = htonl(NFS4ERR_BADXDR); | |
295 | goto err; | |
296 | } | |
297 | ||
298 | tmp = ntohl(*p++); /* bitmap size */ | |
299 | if (tmp != 1) { | |
300 | status = htonl(NFS4ERR_INVAL); | |
301 | goto err; | |
302 | } | |
303 | dev->cbd_notify_type = ntohl(*p++); | |
304 | if (dev->cbd_notify_type != NOTIFY_DEVICEID4_CHANGE && | |
305 | dev->cbd_notify_type != NOTIFY_DEVICEID4_DELETE) { | |
306 | status = htonl(NFS4ERR_INVAL); | |
307 | goto err; | |
308 | } | |
309 | ||
310 | tmp = ntohl(*p++); /* opaque size */ | |
311 | if (((dev->cbd_notify_type == NOTIFY_DEVICEID4_CHANGE) && | |
312 | (tmp != NFS4_DEVICEID4_SIZE + 8)) || | |
313 | ((dev->cbd_notify_type == NOTIFY_DEVICEID4_DELETE) && | |
314 | (tmp != NFS4_DEVICEID4_SIZE + 4))) { | |
315 | status = htonl(NFS4ERR_INVAL); | |
316 | goto err; | |
317 | } | |
318 | dev->cbd_layout_type = ntohl(*p++); | |
319 | memcpy(dev->cbd_dev_id.data, p, NFS4_DEVICEID4_SIZE); | |
320 | p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE); | |
321 | ||
322 | if (dev->cbd_layout_type == NOTIFY_DEVICEID4_CHANGE) { | |
eb72f484 | 323 | p = xdr_inline_decode(xdr, sizeof(uint32_t)); |
1be5683b ME |
324 | if (unlikely(p == NULL)) { |
325 | status = htonl(NFS4ERR_BADXDR); | |
326 | goto err; | |
327 | } | |
328 | dev->cbd_immediate = ntohl(*p++); | |
329 | } else { | |
330 | dev->cbd_immediate = 0; | |
331 | } | |
332 | ||
333 | args->ndevs++; | |
334 | ||
335 | dprintk("%s: type %d layout 0x%x immediate %d\n", | |
336 | __func__, dev->cbd_notify_type, dev->cbd_layout_type, | |
337 | dev->cbd_immediate); | |
338 | } | |
339 | out: | |
340 | dprintk("%s: status %d ndevs %d\n", | |
341 | __func__, ntohl(status), args->ndevs); | |
342 | return status; | |
343 | err: | |
344 | kfree(args->devs); | |
345 | goto out; | |
346 | } | |
347 | ||
9733f0d9 | 348 | static __be32 decode_sessionid(struct xdr_stream *xdr, |
4aece6a1 BH |
349 | struct nfs4_sessionid *sid) |
350 | { | |
9733f0d9 | 351 | __be32 *p; |
4aece6a1 | 352 | |
eb72f484 | 353 | p = xdr_inline_decode(xdr, NFS4_MAX_SESSIONID_LEN); |
4aece6a1 | 354 | if (unlikely(p == NULL)) |
a419aef8 | 355 | return htonl(NFS4ERR_RESOURCE); |
4aece6a1 | 356 | |
590184a6 | 357 | memcpy(sid->data, p, NFS4_MAX_SESSIONID_LEN); |
4aece6a1 BH |
358 | return 0; |
359 | } | |
360 | ||
9733f0d9 | 361 | static __be32 decode_rc_list(struct xdr_stream *xdr, |
4aece6a1 BH |
362 | struct referring_call_list *rc_list) |
363 | { | |
9733f0d9 | 364 | __be32 *p; |
4aece6a1 | 365 | int i; |
9733f0d9 | 366 | __be32 status; |
4aece6a1 BH |
367 | |
368 | status = decode_sessionid(xdr, &rc_list->rcl_sessionid); | |
369 | if (status) | |
370 | goto out; | |
371 | ||
372 | status = htonl(NFS4ERR_RESOURCE); | |
eb72f484 | 373 | p = xdr_inline_decode(xdr, sizeof(uint32_t)); |
4aece6a1 BH |
374 | if (unlikely(p == NULL)) |
375 | goto out; | |
376 | ||
377 | rc_list->rcl_nrefcalls = ntohl(*p++); | |
378 | if (rc_list->rcl_nrefcalls) { | |
eb72f484 | 379 | p = xdr_inline_decode(xdr, |
4aece6a1 BH |
380 | rc_list->rcl_nrefcalls * 2 * sizeof(uint32_t)); |
381 | if (unlikely(p == NULL)) | |
382 | goto out; | |
a4f743a6 | 383 | rc_list->rcl_refcalls = kmalloc_array(rc_list->rcl_nrefcalls, |
4aece6a1 BH |
384 | sizeof(*rc_list->rcl_refcalls), |
385 | GFP_KERNEL); | |
386 | if (unlikely(rc_list->rcl_refcalls == NULL)) | |
387 | goto out; | |
388 | for (i = 0; i < rc_list->rcl_nrefcalls; i++) { | |
389 | rc_list->rcl_refcalls[i].rc_sequenceid = ntohl(*p++); | |
390 | rc_list->rcl_refcalls[i].rc_slotid = ntohl(*p++); | |
391 | } | |
392 | } | |
393 | status = 0; | |
394 | ||
395 | out: | |
396 | return status; | |
397 | } | |
398 | ||
9733f0d9 | 399 | static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp, |
4aece6a1 | 400 | struct xdr_stream *xdr, |
f4dac4ad | 401 | void *argp) |
4aece6a1 | 402 | { |
f4dac4ad | 403 | struct cb_sequenceargs *args = argp; |
9733f0d9 | 404 | __be32 *p; |
4aece6a1 | 405 | int i; |
9733f0d9 | 406 | __be32 status; |
4aece6a1 BH |
407 | |
408 | status = decode_sessionid(xdr, &args->csa_sessionid); | |
409 | if (status) | |
1796549a | 410 | return status; |
4aece6a1 | 411 | |
eb72f484 | 412 | p = xdr_inline_decode(xdr, 5 * sizeof(uint32_t)); |
4aece6a1 | 413 | if (unlikely(p == NULL)) |
1796549a | 414 | return htonl(NFS4ERR_RESOURCE); |
4aece6a1 | 415 | |
65fc64e5 | 416 | args->csa_addr = svc_addr(rqstp); |
4aece6a1 BH |
417 | args->csa_sequenceid = ntohl(*p++); |
418 | args->csa_slotid = ntohl(*p++); | |
419 | args->csa_highestslotid = ntohl(*p++); | |
420 | args->csa_cachethis = ntohl(*p++); | |
421 | args->csa_nrclists = ntohl(*p++); | |
422 | args->csa_rclists = NULL; | |
423 | if (args->csa_nrclists) { | |
0439f31c DC |
424 | args->csa_rclists = kmalloc_array(args->csa_nrclists, |
425 | sizeof(*args->csa_rclists), | |
426 | GFP_KERNEL); | |
4aece6a1 | 427 | if (unlikely(args->csa_rclists == NULL)) |
1796549a | 428 | return htonl(NFS4ERR_RESOURCE); |
4aece6a1 BH |
429 | |
430 | for (i = 0; i < args->csa_nrclists; i++) { | |
431 | status = decode_rc_list(xdr, &args->csa_rclists[i]); | |
d8ba1f97 TM |
432 | if (status) { |
433 | args->csa_nrclists = i; | |
4aece6a1 | 434 | goto out_free; |
d8ba1f97 | 435 | } |
4aece6a1 BH |
436 | } |
437 | } | |
1796549a | 438 | return 0; |
4aece6a1 BH |
439 | |
440 | out_free: | |
441 | for (i = 0; i < args->csa_nrclists; i++) | |
442 | kfree(args->csa_rclists[i].rcl_refcalls); | |
443 | kfree(args->csa_rclists); | |
1796549a | 444 | return status; |
4aece6a1 BH |
445 | } |
446 | ||
9733f0d9 | 447 | static __be32 decode_recallany_args(struct svc_rqst *rqstp, |
31f09607 | 448 | struct xdr_stream *xdr, |
f4dac4ad | 449 | void *argp) |
31f09607 | 450 | { |
f4dac4ad | 451 | struct cb_recallanyargs *args = argp; |
d743c3c9 PT |
452 | uint32_t bitmap[2]; |
453 | __be32 *p, status; | |
31f09607 | 454 | |
eb72f484 | 455 | p = xdr_inline_decode(xdr, 4); |
31f09607 AB |
456 | if (unlikely(p == NULL)) |
457 | return htonl(NFS4ERR_BADXDR); | |
458 | args->craa_objs_to_keep = ntohl(*p++); | |
d743c3c9 PT |
459 | status = decode_bitmap(xdr, bitmap); |
460 | if (unlikely(status)) | |
461 | return status; | |
462 | args->craa_type_mask = bitmap[0]; | |
31f09607 AB |
463 | |
464 | return 0; | |
465 | } | |
466 | ||
9733f0d9 | 467 | static __be32 decode_recallslot_args(struct svc_rqst *rqstp, |
b9efa1b2 | 468 | struct xdr_stream *xdr, |
f4dac4ad | 469 | void *argp) |
b9efa1b2 | 470 | { |
f4dac4ad | 471 | struct cb_recallslotargs *args = argp; |
b9efa1b2 AA |
472 | __be32 *p; |
473 | ||
eb72f484 | 474 | p = xdr_inline_decode(xdr, 4); |
b9efa1b2 AA |
475 | if (unlikely(p == NULL)) |
476 | return htonl(NFS4ERR_BADXDR); | |
d5fb4ce3 | 477 | args->crsa_target_highest_slotid = ntohl(*p++); |
b9efa1b2 AA |
478 | return 0; |
479 | } | |
480 | ||
db783688 JL |
481 | static __be32 decode_lockowner(struct xdr_stream *xdr, struct cb_notify_lock_args *args) |
482 | { | |
483 | __be32 *p; | |
484 | unsigned int len; | |
485 | ||
eb72f484 | 486 | p = xdr_inline_decode(xdr, 12); |
db783688 JL |
487 | if (unlikely(p == NULL)) |
488 | return htonl(NFS4ERR_BADXDR); | |
489 | ||
490 | p = xdr_decode_hyper(p, &args->cbnl_owner.clientid); | |
491 | len = be32_to_cpu(*p); | |
492 | ||
eb72f484 | 493 | p = xdr_inline_decode(xdr, len); |
db783688 JL |
494 | if (unlikely(p == NULL)) |
495 | return htonl(NFS4ERR_BADXDR); | |
496 | ||
497 | /* Only try to decode if the length is right */ | |
498 | if (len == 20) { | |
499 | p += 2; /* skip "lock id:" */ | |
500 | args->cbnl_owner.s_dev = be32_to_cpu(*p++); | |
501 | xdr_decode_hyper(p, &args->cbnl_owner.id); | |
502 | args->cbnl_valid = true; | |
503 | } else { | |
504 | args->cbnl_owner.s_dev = 0; | |
505 | args->cbnl_owner.id = 0; | |
506 | args->cbnl_valid = false; | |
507 | } | |
508 | return 0; | |
509 | } | |
510 | ||
f4dac4ad CH |
511 | static __be32 decode_notify_lock_args(struct svc_rqst *rqstp, |
512 | struct xdr_stream *xdr, void *argp) | |
db783688 | 513 | { |
f4dac4ad | 514 | struct cb_notify_lock_args *args = argp; |
db783688 JL |
515 | __be32 status; |
516 | ||
517 | status = decode_fh(xdr, &args->cbnl_fh); | |
518 | if (unlikely(status != 0)) | |
535ece2b AS |
519 | return status; |
520 | return decode_lockowner(xdr, args); | |
db783688 JL |
521 | } |
522 | ||
4aece6a1 | 523 | #endif /* CONFIG_NFS_V4_1 */ |
5178a125 OK |
524 | #ifdef CONFIG_NFS_V4_2 |
525 | static __be32 decode_write_response(struct xdr_stream *xdr, | |
526 | struct cb_offloadargs *args) | |
527 | { | |
528 | __be32 *p; | |
529 | ||
530 | /* skip the always zero field */ | |
eb72f484 | 531 | p = xdr_inline_decode(xdr, 4); |
5178a125 OK |
532 | if (unlikely(!p)) |
533 | goto out; | |
534 | p++; | |
535 | ||
536 | /* decode count, stable_how, verifier */ | |
537 | p = xdr_inline_decode(xdr, 8 + 4); | |
538 | if (unlikely(!p)) | |
539 | goto out; | |
540 | p = xdr_decode_hyper(p, &args->wr_count); | |
541 | args->wr_writeverf.committed = be32_to_cpup(p); | |
542 | p = xdr_inline_decode(xdr, NFS4_VERIFIER_SIZE); | |
543 | if (likely(p)) { | |
544 | memcpy(&args->wr_writeverf.verifier.data[0], p, | |
545 | NFS4_VERIFIER_SIZE); | |
546 | return 0; | |
547 | } | |
548 | out: | |
549 | return htonl(NFS4ERR_RESOURCE); | |
550 | } | |
551 | ||
552 | static __be32 decode_offload_args(struct svc_rqst *rqstp, | |
553 | struct xdr_stream *xdr, | |
554 | void *data) | |
555 | { | |
556 | struct cb_offloadargs *args = data; | |
557 | __be32 *p; | |
558 | __be32 status; | |
559 | ||
560 | /* decode fh */ | |
561 | status = decode_fh(xdr, &args->coa_fh); | |
562 | if (unlikely(status != 0)) | |
563 | return status; | |
564 | ||
565 | /* decode stateid */ | |
566 | status = decode_stateid(xdr, &args->coa_stateid); | |
567 | if (unlikely(status != 0)) | |
568 | return status; | |
4aece6a1 | 569 | |
5178a125 | 570 | /* decode status */ |
eb72f484 | 571 | p = xdr_inline_decode(xdr, 4); |
5178a125 OK |
572 | if (unlikely(!p)) |
573 | goto out; | |
574 | args->error = ntohl(*p++); | |
575 | if (!args->error) { | |
576 | status = decode_write_response(xdr, args); | |
577 | if (unlikely(status != 0)) | |
578 | return status; | |
579 | } else { | |
580 | p = xdr_inline_decode(xdr, 8); | |
581 | if (unlikely(!p)) | |
582 | goto out; | |
583 | p = xdr_decode_hyper(p, &args->wr_count); | |
584 | } | |
585 | return 0; | |
586 | out: | |
587 | return htonl(NFS4ERR_RESOURCE); | |
588 | } | |
589 | #endif /* CONFIG_NFS_V4_2 */ | |
e6f684f6 | 590 | static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str) |
1da177e4 | 591 | { |
ab6e9aaf TM |
592 | if (unlikely(xdr_stream_encode_opaque(xdr, str, len) < 0)) |
593 | return cpu_to_be32(NFS4ERR_RESOURCE); | |
1da177e4 LT |
594 | return 0; |
595 | } | |
596 | ||
8b064946 | 597 | static __be32 encode_attr_bitmap(struct xdr_stream *xdr, const uint32_t *bitmap, size_t sz) |
1da177e4 | 598 | { |
8b064946 TM |
599 | if (xdr_stream_encode_uint32_array(xdr, bitmap, sz) < 0) |
600 | return cpu_to_be32(NFS4ERR_RESOURCE); | |
1da177e4 LT |
601 | return 0; |
602 | } | |
603 | ||
e6f684f6 | 604 | static __be32 encode_attr_change(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t change) |
1da177e4 | 605 | { |
5704fdeb | 606 | __be32 *p; |
1da177e4 LT |
607 | |
608 | if (!(bitmap[0] & FATTR4_WORD0_CHANGE)) | |
609 | return 0; | |
610 | p = xdr_reserve_space(xdr, 8); | |
90dc7d27 | 611 | if (unlikely(!p)) |
1da177e4 LT |
612 | return htonl(NFS4ERR_RESOURCE); |
613 | p = xdr_encode_hyper(p, change); | |
614 | return 0; | |
615 | } | |
616 | ||
e6f684f6 | 617 | static __be32 encode_attr_size(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t size) |
1da177e4 | 618 | { |
5704fdeb | 619 | __be32 *p; |
1da177e4 LT |
620 | |
621 | if (!(bitmap[0] & FATTR4_WORD0_SIZE)) | |
622 | return 0; | |
623 | p = xdr_reserve_space(xdr, 8); | |
90dc7d27 | 624 | if (unlikely(!p)) |
1da177e4 LT |
625 | return htonl(NFS4ERR_RESOURCE); |
626 | p = xdr_encode_hyper(p, size); | |
627 | return 0; | |
628 | } | |
629 | ||
e6f684f6 | 630 | static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec *time) |
1da177e4 | 631 | { |
5704fdeb | 632 | __be32 *p; |
1da177e4 LT |
633 | |
634 | p = xdr_reserve_space(xdr, 12); | |
90dc7d27 | 635 | if (unlikely(!p)) |
1da177e4 LT |
636 | return htonl(NFS4ERR_RESOURCE); |
637 | p = xdr_encode_hyper(p, time->tv_sec); | |
638 | *p = htonl(time->tv_nsec); | |
639 | return 0; | |
640 | } | |
641 | ||
e6f684f6 | 642 | static __be32 encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) |
1da177e4 LT |
643 | { |
644 | if (!(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) | |
645 | return 0; | |
646 | return encode_attr_time(xdr,time); | |
647 | } | |
648 | ||
e6f684f6 | 649 | static __be32 encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) |
1da177e4 LT |
650 | { |
651 | if (!(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) | |
652 | return 0; | |
653 | return encode_attr_time(xdr,time); | |
654 | } | |
655 | ||
e6f684f6 | 656 | static __be32 encode_compound_hdr_res(struct xdr_stream *xdr, struct cb_compound_hdr_res *hdr) |
1da177e4 | 657 | { |
e6f684f6 | 658 | __be32 status; |
1da177e4 LT |
659 | |
660 | hdr->status = xdr_reserve_space(xdr, 4); | |
661 | if (unlikely(hdr->status == NULL)) | |
662 | return htonl(NFS4ERR_RESOURCE); | |
663 | status = encode_string(xdr, hdr->taglen, hdr->tag); | |
664 | if (unlikely(status != 0)) | |
665 | return status; | |
666 | hdr->nops = xdr_reserve_space(xdr, 4); | |
667 | if (unlikely(hdr->nops == NULL)) | |
668 | return htonl(NFS4ERR_RESOURCE); | |
669 | return 0; | |
670 | } | |
671 | ||
e6f684f6 | 672 | static __be32 encode_op_hdr(struct xdr_stream *xdr, uint32_t op, __be32 res) |
1da177e4 | 673 | { |
5704fdeb | 674 | __be32 *p; |
1da177e4 LT |
675 | |
676 | p = xdr_reserve_space(xdr, 8); | |
677 | if (unlikely(p == NULL)) | |
31d2b435 | 678 | return htonl(NFS4ERR_RESOURCE_HDR); |
1da177e4 LT |
679 | *p++ = htonl(op); |
680 | *p = res; | |
681 | return 0; | |
682 | } | |
683 | ||
f4dac4ad CH |
684 | static __be32 encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr, |
685 | const void *resp) | |
1da177e4 | 686 | { |
f4dac4ad | 687 | const struct cb_getattrres *res = resp; |
5704fdeb | 688 | __be32 *savep = NULL; |
e6f684f6 | 689 | __be32 status = res->status; |
1da177e4 LT |
690 | |
691 | if (unlikely(status != 0)) | |
692 | goto out; | |
8b064946 | 693 | status = encode_attr_bitmap(xdr, res->bitmap, ARRAY_SIZE(res->bitmap)); |
1da177e4 LT |
694 | if (unlikely(status != 0)) |
695 | goto out; | |
8b064946 TM |
696 | status = cpu_to_be32(NFS4ERR_RESOURCE); |
697 | savep = xdr_reserve_space(xdr, sizeof(*savep)); | |
698 | if (unlikely(!savep)) | |
699 | goto out; | |
1da177e4 LT |
700 | status = encode_attr_change(xdr, res->bitmap, res->change_attr); |
701 | if (unlikely(status != 0)) | |
702 | goto out; | |
703 | status = encode_attr_size(xdr, res->bitmap, res->size); | |
704 | if (unlikely(status != 0)) | |
705 | goto out; | |
706 | status = encode_attr_ctime(xdr, res->bitmap, &res->ctime); | |
707 | if (unlikely(status != 0)) | |
708 | goto out; | |
709 | status = encode_attr_mtime(xdr, res->bitmap, &res->mtime); | |
710 | *savep = htonl((unsigned int)((char *)xdr->p - (char *)(savep+1))); | |
711 | out: | |
1da177e4 LT |
712 | return status; |
713 | } | |
714 | ||
34bc47c9 BH |
715 | #if defined(CONFIG_NFS_V4_1) |
716 | ||
9733f0d9 | 717 | static __be32 encode_sessionid(struct xdr_stream *xdr, |
4aece6a1 BH |
718 | const struct nfs4_sessionid *sid) |
719 | { | |
9733f0d9 | 720 | __be32 *p; |
4aece6a1 | 721 | |
590184a6 | 722 | p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN); |
4aece6a1 BH |
723 | if (unlikely(p == NULL)) |
724 | return htonl(NFS4ERR_RESOURCE); | |
725 | ||
590184a6 | 726 | memcpy(p, sid, NFS4_MAX_SESSIONID_LEN); |
4aece6a1 BH |
727 | return 0; |
728 | } | |
729 | ||
9733f0d9 | 730 | static __be32 encode_cb_sequence_res(struct svc_rqst *rqstp, |
4aece6a1 | 731 | struct xdr_stream *xdr, |
f4dac4ad | 732 | const void *resp) |
4aece6a1 | 733 | { |
f4dac4ad | 734 | const struct cb_sequenceres *res = resp; |
9733f0d9 | 735 | __be32 *p; |
e216c8c7 | 736 | __be32 status = res->csr_status; |
4aece6a1 BH |
737 | |
738 | if (unlikely(status != 0)) | |
3d0bfaa6 | 739 | return status; |
4aece6a1 | 740 | |
e0a63c0b KM |
741 | status = encode_sessionid(xdr, &res->csr_sessionid); |
742 | if (status) | |
3d0bfaa6 | 743 | return status; |
4aece6a1 BH |
744 | |
745 | p = xdr_reserve_space(xdr, 4 * sizeof(uint32_t)); | |
746 | if (unlikely(p == NULL)) | |
747 | return htonl(NFS4ERR_RESOURCE); | |
748 | ||
749 | *p++ = htonl(res->csr_sequenceid); | |
750 | *p++ = htonl(res->csr_slotid); | |
751 | *p++ = htonl(res->csr_highestslotid); | |
752 | *p++ = htonl(res->csr_target_highestslotid); | |
3d0bfaa6 | 753 | return 0; |
4aece6a1 BH |
754 | } |
755 | ||
34bc47c9 BH |
756 | static __be32 |
757 | preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) | |
758 | { | |
281fe15d BH |
759 | if (op_nr == OP_CB_SEQUENCE) { |
760 | if (nop != 0) | |
761 | return htonl(NFS4ERR_SEQUENCE_POS); | |
762 | } else { | |
763 | if (nop == 0) | |
764 | return htonl(NFS4ERR_OP_NOT_IN_SESSION); | |
765 | } | |
766 | ||
34bc47c9 BH |
767 | switch (op_nr) { |
768 | case OP_CB_GETATTR: | |
769 | case OP_CB_RECALL: | |
4aece6a1 | 770 | case OP_CB_SEQUENCE: |
31f09607 | 771 | case OP_CB_RECALL_ANY: |
b9efa1b2 | 772 | case OP_CB_RECALL_SLOT: |
f2a62561 | 773 | case OP_CB_LAYOUTRECALL: |
1be5683b | 774 | case OP_CB_NOTIFY_DEVICEID: |
db783688 | 775 | case OP_CB_NOTIFY_LOCK: |
34bc47c9 BH |
776 | *op = &callback_ops[op_nr]; |
777 | break; | |
778 | ||
34bc47c9 BH |
779 | case OP_CB_NOTIFY: |
780 | case OP_CB_PUSH_DELEG: | |
34bc47c9 | 781 | case OP_CB_RECALLABLE_OBJ_AVAIL: |
34bc47c9 | 782 | case OP_CB_WANTS_CANCELLED: |
34bc47c9 BH |
783 | return htonl(NFS4ERR_NOTSUPP); |
784 | ||
785 | default: | |
786 | return htonl(NFS4ERR_OP_ILLEGAL); | |
787 | } | |
788 | ||
789 | return htonl(NFS_OK); | |
790 | } | |
791 | ||
810d82e6 TM |
792 | static void nfs4_callback_free_slot(struct nfs4_session *session, |
793 | struct nfs4_slot *slot) | |
42acd021 AA |
794 | { |
795 | struct nfs4_slot_table *tbl = &session->bc_slot_table; | |
796 | ||
797 | spin_lock(&tbl->slot_tbl_lock); | |
798 | /* | |
799 | * Let the state manager know callback processing done. | |
800 | * A single slot, so highest used slotid is either 0 or -1 | |
801 | */ | |
810d82e6 | 802 | nfs4_free_slot(tbl, slot); |
42acd021 AA |
803 | spin_unlock(&tbl->slot_tbl_lock); |
804 | } | |
805 | ||
55a67399 | 806 | static void nfs4_cb_free_slot(struct cb_process_state *cps) |
42acd021 | 807 | { |
810d82e6 TM |
808 | if (cps->slot) { |
809 | nfs4_callback_free_slot(cps->clp->cl_session, cps->slot); | |
810 | cps->slot = NULL; | |
811 | } | |
42acd021 AA |
812 | } |
813 | ||
34bc47c9 BH |
814 | #else /* CONFIG_NFS_V4_1 */ |
815 | ||
816 | static __be32 | |
817 | preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) | |
818 | { | |
819 | return htonl(NFS4ERR_MINOR_VERS_MISMATCH); | |
820 | } | |
821 | ||
55a67399 | 822 | static void nfs4_cb_free_slot(struct cb_process_state *cps) |
42acd021 AA |
823 | { |
824 | } | |
34bc47c9 BH |
825 | #endif /* CONFIG_NFS_V4_1 */ |
826 | ||
6b140b85 BS |
827 | #ifdef CONFIG_NFS_V4_2 |
828 | static __be32 | |
829 | preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op) | |
830 | { | |
831 | __be32 status = preprocess_nfs41_op(nop, op_nr, op); | |
832 | if (status != htonl(NFS4ERR_OP_ILLEGAL)) | |
833 | return status; | |
834 | ||
5178a125 OK |
835 | if (op_nr == OP_CB_OFFLOAD) { |
836 | *op = &callback_ops[op_nr]; | |
837 | return htonl(NFS_OK); | |
838 | } else | |
6b140b85 BS |
839 | return htonl(NFS4ERR_NOTSUPP); |
840 | return htonl(NFS4ERR_OP_ILLEGAL); | |
841 | } | |
842 | #else /* CONFIG_NFS_V4_2 */ | |
843 | static __be32 | |
844 | preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op) | |
845 | { | |
846 | return htonl(NFS4ERR_MINOR_VERS_MISMATCH); | |
847 | } | |
848 | #endif /* CONFIG_NFS_V4_2 */ | |
849 | ||
34bc47c9 BH |
850 | static __be32 |
851 | preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op) | |
852 | { | |
853 | switch (op_nr) { | |
854 | case OP_CB_GETATTR: | |
855 | case OP_CB_RECALL: | |
856 | *op = &callback_ops[op_nr]; | |
857 | break; | |
858 | default: | |
859 | return htonl(NFS4ERR_OP_ILLEGAL); | |
860 | } | |
861 | ||
862 | return htonl(NFS_OK); | |
863 | } | |
864 | ||
459de2ed | 865 | static __be32 process_op(int nop, struct svc_rqst *rqstp, |
1da177e4 | 866 | struct xdr_stream *xdr_in, void *argp, |
c36fca52 AA |
867 | struct xdr_stream *xdr_out, void *resp, |
868 | struct cb_process_state *cps) | |
1da177e4 | 869 | { |
a162a6b8 | 870 | struct callback_op *op = &callback_ops[0]; |
31d2b435 | 871 | unsigned int op_nr; |
34bc47c9 | 872 | __be32 status; |
1da177e4 | 873 | long maxlen; |
e6f684f6 | 874 | __be32 res; |
1da177e4 | 875 | |
1da177e4 | 876 | status = decode_op_hdr(xdr_in, &op_nr); |
31d2b435 AA |
877 | if (unlikely(status)) |
878 | return status; | |
1da177e4 | 879 | |
6b140b85 BS |
880 | switch (cps->minorversion) { |
881 | case 0: | |
882 | status = preprocess_nfs4_op(op_nr, &op); | |
883 | break; | |
884 | case 1: | |
885 | status = preprocess_nfs41_op(nop, op_nr, &op); | |
886 | break; | |
887 | case 2: | |
888 | status = preprocess_nfs42_op(nop, op_nr, &op); | |
889 | break; | |
890 | default: | |
891 | status = htonl(NFS4ERR_MINOR_VERS_MISMATCH); | |
892 | } | |
34bc47c9 | 893 | |
34bc47c9 BH |
894 | if (status == htonl(NFS4ERR_OP_ILLEGAL)) |
895 | op_nr = OP_CB_ILLEGAL; | |
b92b3019 AA |
896 | if (status) |
897 | goto encode_hdr; | |
31d2b435 | 898 | |
c36fca52 AA |
899 | if (cps->drc_status) { |
900 | status = cps->drc_status; | |
4911096f AA |
901 | goto encode_hdr; |
902 | } | |
903 | ||
1da177e4 LT |
904 | maxlen = xdr_out->end - xdr_out->p; |
905 | if (maxlen > 0 && maxlen < PAGE_SIZE) { | |
e95e60da AA |
906 | status = op->decode_args(rqstp, xdr_in, argp); |
907 | if (likely(status == 0)) | |
c36fca52 | 908 | status = op->process_op(argp, resp, cps); |
1da177e4 LT |
909 | } else |
910 | status = htonl(NFS4ERR_RESOURCE); | |
911 | ||
b92b3019 | 912 | encode_hdr: |
1da177e4 | 913 | res = encode_op_hdr(xdr_out, op_nr, status); |
31d2b435 AA |
914 | if (unlikely(res)) |
915 | return res; | |
1da177e4 LT |
916 | if (op->encode_res != NULL && status == 0) |
917 | status = op->encode_res(rqstp, xdr_out, resp); | |
1da177e4 LT |
918 | return status; |
919 | } | |
920 | ||
921 | /* | |
922 | * Decode, process and encode a COMPOUND | |
923 | */ | |
a6beb732 | 924 | static __be32 nfs4_callback_compound(struct svc_rqst *rqstp) |
1da177e4 | 925 | { |
3a6258e1 TM |
926 | struct cb_compound_hdr_arg hdr_arg = { 0 }; |
927 | struct cb_compound_hdr_res hdr_res = { NULL }; | |
1da177e4 | 928 | struct xdr_stream xdr_in, xdr_out; |
c36fca52 AA |
929 | __be32 *p, status; |
930 | struct cb_process_state cps = { | |
931 | .drc_status = 0, | |
932 | .clp = NULL, | |
9695c705 | 933 | .net = SVC_NET(rqstp), |
c36fca52 | 934 | }; |
3a6258e1 | 935 | unsigned int nops = 0; |
1da177e4 | 936 | |
0ccc61b1 CL |
937 | xdr_init_decode(&xdr_in, &rqstp->rq_arg, |
938 | rqstp->rq_arg.head[0].iov_base, NULL); | |
1da177e4 | 939 | |
5704fdeb | 940 | p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len); |
0ccc61b1 | 941 | xdr_init_encode(&xdr_out, &rqstp->rq_res, p, NULL); |
1da177e4 | 942 | |
3a6258e1 | 943 | status = decode_compound_hdr_arg(&xdr_in, &hdr_arg); |
4ed0d83d | 944 | if (status == htonl(NFS4ERR_RESOURCE)) |
3a6258e1 TM |
945 | return rpc_garbage_args; |
946 | ||
c36fca52 | 947 | if (hdr_arg.minorversion == 0) { |
9695c705 | 948 | cps.clp = nfs4_find_client_ident(SVC_NET(rqstp), hdr_arg.cb_ident); |
32cd3ee5 OK |
949 | if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp)) { |
950 | if (cps.clp) | |
951 | nfs_put_client(cps.clp); | |
a4e187d8 | 952 | goto out_invalidcred; |
32cd3ee5 | 953 | } |
778be232 | 954 | } |
c36fca52 | 955 | |
459de2ed | 956 | cps.minorversion = hdr_arg.minorversion; |
1da177e4 LT |
957 | hdr_res.taglen = hdr_arg.taglen; |
958 | hdr_res.tag = hdr_arg.tag; | |
32cd3ee5 OK |
959 | if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0) { |
960 | if (cps.clp) | |
961 | nfs_put_client(cps.clp); | |
3a6258e1 | 962 | return rpc_system_err; |
32cd3ee5 | 963 | } |
3a6258e1 | 964 | while (status == 0 && nops != hdr_arg.nops) { |
459de2ed | 965 | status = process_op(nops, rqstp, &xdr_in, |
a6beb732 CH |
966 | rqstp->rq_argp, &xdr_out, rqstp->rq_resp, |
967 | &cps); | |
1da177e4 LT |
968 | nops++; |
969 | } | |
3a6258e1 | 970 | |
31d2b435 AA |
971 | /* Buffer overflow in decode_ops_hdr or encode_ops_hdr. Return |
972 | * resource error in cb_compound status without returning op */ | |
973 | if (unlikely(status == htonl(NFS4ERR_RESOURCE_HDR))) { | |
974 | status = htonl(NFS4ERR_RESOURCE); | |
975 | nops--; | |
976 | } | |
977 | ||
1da177e4 LT |
978 | *hdr_res.status = status; |
979 | *hdr_res.nops = htonl(nops); | |
55a67399 | 980 | nfs4_cb_free_slot(&cps); |
c36fca52 | 981 | nfs_put_client(cps.clp); |
1da177e4 | 982 | return rpc_success; |
a4e187d8 CL |
983 | |
984 | out_invalidcred: | |
985 | pr_warn_ratelimited("NFS: NFSv4 callback contains invalid cred\n"); | |
83dd59a0 | 986 | return svc_return_autherr(rqstp, rpc_autherr_badcred); |
1da177e4 LT |
987 | } |
988 | ||
989 | /* | |
990 | * Define NFS4 callback COMPOUND ops. | |
991 | */ | |
992 | static struct callback_op callback_ops[] = { | |
993 | [0] = { | |
994 | .res_maxsize = CB_OP_HDR_RES_MAXSZ, | |
995 | }, | |
996 | [OP_CB_GETATTR] = { | |
f4dac4ad CH |
997 | .process_op = nfs4_callback_getattr, |
998 | .decode_args = decode_getattr_args, | |
999 | .encode_res = encode_getattr_res, | |
1da177e4 LT |
1000 | .res_maxsize = CB_OP_GETATTR_RES_MAXSZ, |
1001 | }, | |
1002 | [OP_CB_RECALL] = { | |
f4dac4ad CH |
1003 | .process_op = nfs4_callback_recall, |
1004 | .decode_args = decode_recall_args, | |
1da177e4 | 1005 | .res_maxsize = CB_OP_RECALL_RES_MAXSZ, |
4aece6a1 BH |
1006 | }, |
1007 | #if defined(CONFIG_NFS_V4_1) | |
f2a62561 | 1008 | [OP_CB_LAYOUTRECALL] = { |
f4dac4ad CH |
1009 | .process_op = nfs4_callback_layoutrecall, |
1010 | .decode_args = decode_layoutrecall_args, | |
f2a62561 FI |
1011 | .res_maxsize = CB_OP_LAYOUTRECALL_RES_MAXSZ, |
1012 | }, | |
1be5683b | 1013 | [OP_CB_NOTIFY_DEVICEID] = { |
f4dac4ad CH |
1014 | .process_op = nfs4_callback_devicenotify, |
1015 | .decode_args = decode_devicenotify_args, | |
1be5683b ME |
1016 | .res_maxsize = CB_OP_DEVICENOTIFY_RES_MAXSZ, |
1017 | }, | |
4aece6a1 | 1018 | [OP_CB_SEQUENCE] = { |
f4dac4ad CH |
1019 | .process_op = nfs4_callback_sequence, |
1020 | .decode_args = decode_cb_sequence_args, | |
1021 | .encode_res = encode_cb_sequence_res, | |
4aece6a1 BH |
1022 | .res_maxsize = CB_OP_SEQUENCE_RES_MAXSZ, |
1023 | }, | |
31f09607 | 1024 | [OP_CB_RECALL_ANY] = { |
f4dac4ad CH |
1025 | .process_op = nfs4_callback_recallany, |
1026 | .decode_args = decode_recallany_args, | |
31f09607 AB |
1027 | .res_maxsize = CB_OP_RECALLANY_RES_MAXSZ, |
1028 | }, | |
b9efa1b2 | 1029 | [OP_CB_RECALL_SLOT] = { |
f4dac4ad CH |
1030 | .process_op = nfs4_callback_recallslot, |
1031 | .decode_args = decode_recallslot_args, | |
b9efa1b2 AA |
1032 | .res_maxsize = CB_OP_RECALLSLOT_RES_MAXSZ, |
1033 | }, | |
db783688 | 1034 | [OP_CB_NOTIFY_LOCK] = { |
f4dac4ad CH |
1035 | .process_op = nfs4_callback_notify_lock, |
1036 | .decode_args = decode_notify_lock_args, | |
db783688 JL |
1037 | .res_maxsize = CB_OP_NOTIFY_LOCK_RES_MAXSZ, |
1038 | }, | |
4aece6a1 | 1039 | #endif /* CONFIG_NFS_V4_1 */ |
5178a125 OK |
1040 | #ifdef CONFIG_NFS_V4_2 |
1041 | [OP_CB_OFFLOAD] = { | |
1042 | .process_op = nfs4_callback_offload, | |
1043 | .decode_args = decode_offload_args, | |
1044 | .res_maxsize = CB_OP_OFFLOAD_RES_MAXSZ, | |
1045 | }, | |
1046 | #endif /* CONFIG_NFS_V4_2 */ | |
1da177e4 LT |
1047 | }; |
1048 | ||
1049 | /* | |
1050 | * Define NFS4 callback procedures | |
1051 | */ | |
860bda29 | 1052 | static const struct svc_procedure nfs4_callback_procedures1[] = { |
1da177e4 LT |
1053 | [CB_NULL] = { |
1054 | .pc_func = nfs4_callback_null, | |
026fec7e | 1055 | .pc_decode = nfs4_decode_void, |
63f8de37 | 1056 | .pc_encode = nfs4_encode_void, |
1da177e4 LT |
1057 | .pc_xdrressize = 1, |
1058 | }, | |
1059 | [CB_COMPOUND] = { | |
1060 | .pc_func = nfs4_callback_compound, | |
63f8de37 | 1061 | .pc_encode = nfs4_encode_void, |
1da177e4 LT |
1062 | .pc_argsize = 256, |
1063 | .pc_ressize = 256, | |
1064 | .pc_xdrressize = NFS4_CALLBACK_BUFSIZE, | |
1065 | } | |
1066 | }; | |
1067 | ||
7fd38af9 | 1068 | static unsigned int nfs4_callback_count1[ARRAY_SIZE(nfs4_callback_procedures1)]; |
e9679189 | 1069 | const struct svc_version nfs4_callback_version1 = { |
1da177e4 LT |
1070 | .vs_vers = 1, |
1071 | .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), | |
1072 | .vs_proc = nfs4_callback_procedures1, | |
7fd38af9 | 1073 | .vs_count = nfs4_callback_count1, |
1da177e4 LT |
1074 | .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, |
1075 | .vs_dispatch = NULL, | |
05a45a2d | 1076 | .vs_hidden = true, |
5283b03e | 1077 | .vs_need_cong_ctrl = true, |
1da177e4 LT |
1078 | }; |
1079 | ||
7fd38af9 | 1080 | static unsigned int nfs4_callback_count4[ARRAY_SIZE(nfs4_callback_procedures1)]; |
e9679189 | 1081 | const struct svc_version nfs4_callback_version4 = { |
07bccc2d AB |
1082 | .vs_vers = 4, |
1083 | .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), | |
1084 | .vs_proc = nfs4_callback_procedures1, | |
7fd38af9 | 1085 | .vs_count = nfs4_callback_count4, |
07bccc2d AB |
1086 | .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, |
1087 | .vs_dispatch = NULL, | |
05a45a2d | 1088 | .vs_hidden = true, |
5283b03e | 1089 | .vs_need_cong_ctrl = true, |
07bccc2d | 1090 | }; |