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" |
2bb50aab | 21 | #include "nfs4trace.h" |
1da177e4 | 22 | |
45724e8a KM |
23 | #define CB_OP_TAGLEN_MAXSZ (512) |
24 | #define CB_OP_HDR_RES_MAXSZ (2 * 4) // opcode, status | |
25 | #define CB_OP_GETATTR_BITMAP_MAXSZ (4 * 4) // bitmap length, 3 bitmaps | |
26 | #define CB_OP_GETATTR_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \ | |
27 | CB_OP_GETATTR_BITMAP_MAXSZ + \ | |
28 | /* change, size, ctime, mtime */\ | |
29 | (2 + 2 + 3 + 3) * 4) | |
30 | #define CB_OP_RECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) | |
1da177e4 | 31 | |
4aece6a1 | 32 | #if defined(CONFIG_NFS_V4_1) |
f2a62561 | 33 | #define CB_OP_LAYOUTRECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
1be5683b | 34 | #define CB_OP_DEVICENOTIFY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
4aece6a1 | 35 | #define CB_OP_SEQUENCE_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \ |
45724e8a KM |
36 | NFS4_MAX_SESSIONID_LEN + \ |
37 | (1 + 3) * 4) // seqid, 3 slotids | |
31f09607 | 38 | #define CB_OP_RECALLANY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
b9efa1b2 | 39 | #define CB_OP_RECALLSLOT_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
db783688 | 40 | #define CB_OP_NOTIFY_LOCK_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
4aece6a1 | 41 | #endif /* CONFIG_NFS_V4_1 */ |
5178a125 OK |
42 | #ifdef CONFIG_NFS_V4_2 |
43 | #define CB_OP_OFFLOAD_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) | |
44 | #endif /* CONFIG_NFS_V4_2 */ | |
4aece6a1 | 45 | |
1da177e4 LT |
46 | #define NFSDBG_FACILITY NFSDBG_CALLBACK |
47 | ||
31d2b435 AA |
48 | /* Internal error code */ |
49 | #define NFS4ERR_RESOURCE_HDR 11050 | |
50 | ||
1da177e4 | 51 | struct callback_op { |
f4dac4ad CH |
52 | __be32 (*process_op)(void *, void *, struct cb_process_state *); |
53 | __be32 (*decode_args)(struct svc_rqst *, struct xdr_stream *, void *); | |
54 | __be32 (*encode_res)(struct svc_rqst *, struct xdr_stream *, | |
55 | const void *); | |
1da177e4 LT |
56 | long res_maxsize; |
57 | }; | |
58 | ||
59 | static struct callback_op callback_ops[]; | |
60 | ||
a6beb732 | 61 | static __be32 nfs4_callback_null(struct svc_rqst *rqstp) |
1da177e4 LT |
62 | { |
63 | return htonl(NFS4_OK); | |
64 | } | |
65 | ||
c35a810c CL |
66 | /* |
67 | * svc_process_common() looks for an XDR encoder to know when | |
68 | * not to drop a Reply. | |
69 | */ | |
130e2054 | 70 | static bool nfs4_encode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
1da177e4 | 71 | { |
130e2054 | 72 | return true; |
1da177e4 LT |
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; |
b05bf5c6 | 261 | uint32_t tmp, n, i; |
1be5683b ME |
262 | __be32 *p; |
263 | __be32 status = 0; | |
1be5683b ME |
264 | |
265 | /* Num of device notifications */ | |
eb72f484 | 266 | p = xdr_inline_decode(xdr, sizeof(uint32_t)); |
1be5683b ME |
267 | if (unlikely(p == NULL)) { |
268 | status = htonl(NFS4ERR_BADXDR); | |
269 | goto out; | |
270 | } | |
271 | n = ntohl(*p++); | |
b05bf5c6 | 272 | if (n == 0) |
1be5683b ME |
273 | goto out; |
274 | ||
a4f743a6 | 275 | args->devs = kmalloc_array(n, sizeof(*args->devs), GFP_KERNEL); |
1be5683b ME |
276 | if (!args->devs) { |
277 | status = htonl(NFS4ERR_DELAY); | |
278 | goto out; | |
279 | } | |
280 | ||
281 | /* Decode each dev notification */ | |
282 | for (i = 0; i < n; i++) { | |
283 | struct cb_devicenotifyitem *dev = &args->devs[i]; | |
284 | ||
eb72f484 CL |
285 | p = xdr_inline_decode(xdr, (4 * sizeof(uint32_t)) + |
286 | NFS4_DEVICEID4_SIZE); | |
1be5683b ME |
287 | if (unlikely(p == NULL)) { |
288 | status = htonl(NFS4ERR_BADXDR); | |
289 | goto err; | |
290 | } | |
291 | ||
292 | tmp = ntohl(*p++); /* bitmap size */ | |
293 | if (tmp != 1) { | |
294 | status = htonl(NFS4ERR_INVAL); | |
295 | goto err; | |
296 | } | |
297 | dev->cbd_notify_type = ntohl(*p++); | |
298 | if (dev->cbd_notify_type != NOTIFY_DEVICEID4_CHANGE && | |
299 | dev->cbd_notify_type != NOTIFY_DEVICEID4_DELETE) { | |
300 | status = htonl(NFS4ERR_INVAL); | |
301 | goto err; | |
302 | } | |
303 | ||
304 | tmp = ntohl(*p++); /* opaque size */ | |
305 | if (((dev->cbd_notify_type == NOTIFY_DEVICEID4_CHANGE) && | |
306 | (tmp != NFS4_DEVICEID4_SIZE + 8)) || | |
307 | ((dev->cbd_notify_type == NOTIFY_DEVICEID4_DELETE) && | |
308 | (tmp != NFS4_DEVICEID4_SIZE + 4))) { | |
309 | status = htonl(NFS4ERR_INVAL); | |
310 | goto err; | |
311 | } | |
312 | dev->cbd_layout_type = ntohl(*p++); | |
313 | memcpy(dev->cbd_dev_id.data, p, NFS4_DEVICEID4_SIZE); | |
314 | p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE); | |
315 | ||
316 | if (dev->cbd_layout_type == NOTIFY_DEVICEID4_CHANGE) { | |
eb72f484 | 317 | p = xdr_inline_decode(xdr, sizeof(uint32_t)); |
1be5683b ME |
318 | if (unlikely(p == NULL)) { |
319 | status = htonl(NFS4ERR_BADXDR); | |
320 | goto err; | |
321 | } | |
322 | dev->cbd_immediate = ntohl(*p++); | |
323 | } else { | |
324 | dev->cbd_immediate = 0; | |
325 | } | |
326 | ||
1be5683b ME |
327 | dprintk("%s: type %d layout 0x%x immediate %d\n", |
328 | __func__, dev->cbd_notify_type, dev->cbd_layout_type, | |
329 | dev->cbd_immediate); | |
330 | } | |
b05bf5c6 TM |
331 | args->ndevs = n; |
332 | dprintk("%s: ndevs %d\n", __func__, args->ndevs); | |
333 | return 0; | |
334 | err: | |
335 | kfree(args->devs); | |
1be5683b | 336 | out: |
b05bf5c6 TM |
337 | args->devs = NULL; |
338 | args->ndevs = 0; | |
1be5683b ME |
339 | dprintk("%s: status %d ndevs %d\n", |
340 | __func__, ntohl(status), args->ndevs); | |
341 | return status; | |
1be5683b ME |
342 | } |
343 | ||
9733f0d9 | 344 | static __be32 decode_sessionid(struct xdr_stream *xdr, |
4aece6a1 BH |
345 | struct nfs4_sessionid *sid) |
346 | { | |
9733f0d9 | 347 | __be32 *p; |
4aece6a1 | 348 | |
eb72f484 | 349 | p = xdr_inline_decode(xdr, NFS4_MAX_SESSIONID_LEN); |
4aece6a1 | 350 | if (unlikely(p == NULL)) |
a419aef8 | 351 | return htonl(NFS4ERR_RESOURCE); |
4aece6a1 | 352 | |
590184a6 | 353 | memcpy(sid->data, p, NFS4_MAX_SESSIONID_LEN); |
4aece6a1 BH |
354 | return 0; |
355 | } | |
356 | ||
9733f0d9 | 357 | static __be32 decode_rc_list(struct xdr_stream *xdr, |
4aece6a1 BH |
358 | struct referring_call_list *rc_list) |
359 | { | |
9733f0d9 | 360 | __be32 *p; |
4aece6a1 | 361 | int i; |
9733f0d9 | 362 | __be32 status; |
4aece6a1 BH |
363 | |
364 | status = decode_sessionid(xdr, &rc_list->rcl_sessionid); | |
365 | if (status) | |
366 | goto out; | |
367 | ||
368 | status = htonl(NFS4ERR_RESOURCE); | |
eb72f484 | 369 | p = xdr_inline_decode(xdr, sizeof(uint32_t)); |
4aece6a1 BH |
370 | if (unlikely(p == NULL)) |
371 | goto out; | |
372 | ||
373 | rc_list->rcl_nrefcalls = ntohl(*p++); | |
374 | if (rc_list->rcl_nrefcalls) { | |
eb72f484 | 375 | p = xdr_inline_decode(xdr, |
4aece6a1 BH |
376 | rc_list->rcl_nrefcalls * 2 * sizeof(uint32_t)); |
377 | if (unlikely(p == NULL)) | |
378 | goto out; | |
a4f743a6 | 379 | rc_list->rcl_refcalls = kmalloc_array(rc_list->rcl_nrefcalls, |
4aece6a1 BH |
380 | sizeof(*rc_list->rcl_refcalls), |
381 | GFP_KERNEL); | |
382 | if (unlikely(rc_list->rcl_refcalls == NULL)) | |
383 | goto out; | |
384 | for (i = 0; i < rc_list->rcl_nrefcalls; i++) { | |
385 | rc_list->rcl_refcalls[i].rc_sequenceid = ntohl(*p++); | |
386 | rc_list->rcl_refcalls[i].rc_slotid = ntohl(*p++); | |
387 | } | |
388 | } | |
389 | status = 0; | |
390 | ||
391 | out: | |
392 | return status; | |
393 | } | |
394 | ||
9733f0d9 | 395 | static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp, |
4aece6a1 | 396 | struct xdr_stream *xdr, |
f4dac4ad | 397 | void *argp) |
4aece6a1 | 398 | { |
f4dac4ad | 399 | struct cb_sequenceargs *args = argp; |
9733f0d9 | 400 | __be32 *p; |
4aece6a1 | 401 | int i; |
9733f0d9 | 402 | __be32 status; |
4aece6a1 BH |
403 | |
404 | status = decode_sessionid(xdr, &args->csa_sessionid); | |
405 | if (status) | |
1796549a | 406 | return status; |
4aece6a1 | 407 | |
eb72f484 | 408 | p = xdr_inline_decode(xdr, 5 * sizeof(uint32_t)); |
4aece6a1 | 409 | if (unlikely(p == NULL)) |
1796549a | 410 | return htonl(NFS4ERR_RESOURCE); |
4aece6a1 | 411 | |
65fc64e5 | 412 | args->csa_addr = svc_addr(rqstp); |
4aece6a1 BH |
413 | args->csa_sequenceid = ntohl(*p++); |
414 | args->csa_slotid = ntohl(*p++); | |
415 | args->csa_highestslotid = ntohl(*p++); | |
416 | args->csa_cachethis = ntohl(*p++); | |
417 | args->csa_nrclists = ntohl(*p++); | |
418 | args->csa_rclists = NULL; | |
419 | if (args->csa_nrclists) { | |
0439f31c DC |
420 | args->csa_rclists = kmalloc_array(args->csa_nrclists, |
421 | sizeof(*args->csa_rclists), | |
422 | GFP_KERNEL); | |
4aece6a1 | 423 | if (unlikely(args->csa_rclists == NULL)) |
1796549a | 424 | return htonl(NFS4ERR_RESOURCE); |
4aece6a1 BH |
425 | |
426 | for (i = 0; i < args->csa_nrclists; i++) { | |
427 | status = decode_rc_list(xdr, &args->csa_rclists[i]); | |
d8ba1f97 TM |
428 | if (status) { |
429 | args->csa_nrclists = i; | |
4aece6a1 | 430 | goto out_free; |
d8ba1f97 | 431 | } |
4aece6a1 BH |
432 | } |
433 | } | |
1796549a | 434 | return 0; |
4aece6a1 BH |
435 | |
436 | out_free: | |
437 | for (i = 0; i < args->csa_nrclists; i++) | |
438 | kfree(args->csa_rclists[i].rcl_refcalls); | |
439 | kfree(args->csa_rclists); | |
1796549a | 440 | return status; |
4aece6a1 BH |
441 | } |
442 | ||
9733f0d9 | 443 | static __be32 decode_recallany_args(struct svc_rqst *rqstp, |
31f09607 | 444 | struct xdr_stream *xdr, |
f4dac4ad | 445 | void *argp) |
31f09607 | 446 | { |
f4dac4ad | 447 | struct cb_recallanyargs *args = argp; |
d743c3c9 PT |
448 | uint32_t bitmap[2]; |
449 | __be32 *p, status; | |
31f09607 | 450 | |
eb72f484 | 451 | p = xdr_inline_decode(xdr, 4); |
31f09607 AB |
452 | if (unlikely(p == NULL)) |
453 | return htonl(NFS4ERR_BADXDR); | |
454 | args->craa_objs_to_keep = ntohl(*p++); | |
d743c3c9 PT |
455 | status = decode_bitmap(xdr, bitmap); |
456 | if (unlikely(status)) | |
457 | return status; | |
458 | args->craa_type_mask = bitmap[0]; | |
31f09607 AB |
459 | |
460 | return 0; | |
461 | } | |
462 | ||
9733f0d9 | 463 | static __be32 decode_recallslot_args(struct svc_rqst *rqstp, |
b9efa1b2 | 464 | struct xdr_stream *xdr, |
f4dac4ad | 465 | void *argp) |
b9efa1b2 | 466 | { |
f4dac4ad | 467 | struct cb_recallslotargs *args = argp; |
b9efa1b2 AA |
468 | __be32 *p; |
469 | ||
eb72f484 | 470 | p = xdr_inline_decode(xdr, 4); |
b9efa1b2 AA |
471 | if (unlikely(p == NULL)) |
472 | return htonl(NFS4ERR_BADXDR); | |
d5fb4ce3 | 473 | args->crsa_target_highest_slotid = ntohl(*p++); |
b9efa1b2 AA |
474 | return 0; |
475 | } | |
476 | ||
db783688 JL |
477 | static __be32 decode_lockowner(struct xdr_stream *xdr, struct cb_notify_lock_args *args) |
478 | { | |
479 | __be32 *p; | |
480 | unsigned int len; | |
481 | ||
eb72f484 | 482 | p = xdr_inline_decode(xdr, 12); |
db783688 JL |
483 | if (unlikely(p == NULL)) |
484 | return htonl(NFS4ERR_BADXDR); | |
485 | ||
486 | p = xdr_decode_hyper(p, &args->cbnl_owner.clientid); | |
487 | len = be32_to_cpu(*p); | |
488 | ||
eb72f484 | 489 | p = xdr_inline_decode(xdr, len); |
db783688 JL |
490 | if (unlikely(p == NULL)) |
491 | return htonl(NFS4ERR_BADXDR); | |
492 | ||
493 | /* Only try to decode if the length is right */ | |
494 | if (len == 20) { | |
495 | p += 2; /* skip "lock id:" */ | |
496 | args->cbnl_owner.s_dev = be32_to_cpu(*p++); | |
497 | xdr_decode_hyper(p, &args->cbnl_owner.id); | |
498 | args->cbnl_valid = true; | |
499 | } else { | |
500 | args->cbnl_owner.s_dev = 0; | |
501 | args->cbnl_owner.id = 0; | |
502 | args->cbnl_valid = false; | |
503 | } | |
504 | return 0; | |
505 | } | |
506 | ||
f4dac4ad CH |
507 | static __be32 decode_notify_lock_args(struct svc_rqst *rqstp, |
508 | struct xdr_stream *xdr, void *argp) | |
db783688 | 509 | { |
f4dac4ad | 510 | struct cb_notify_lock_args *args = argp; |
db783688 JL |
511 | __be32 status; |
512 | ||
513 | status = decode_fh(xdr, &args->cbnl_fh); | |
514 | if (unlikely(status != 0)) | |
535ece2b AS |
515 | return status; |
516 | return decode_lockowner(xdr, args); | |
db783688 JL |
517 | } |
518 | ||
4aece6a1 | 519 | #endif /* CONFIG_NFS_V4_1 */ |
5178a125 OK |
520 | #ifdef CONFIG_NFS_V4_2 |
521 | static __be32 decode_write_response(struct xdr_stream *xdr, | |
522 | struct cb_offloadargs *args) | |
523 | { | |
524 | __be32 *p; | |
525 | ||
526 | /* skip the always zero field */ | |
eb72f484 | 527 | p = xdr_inline_decode(xdr, 4); |
5178a125 OK |
528 | if (unlikely(!p)) |
529 | goto out; | |
530 | p++; | |
531 | ||
532 | /* decode count, stable_how, verifier */ | |
533 | p = xdr_inline_decode(xdr, 8 + 4); | |
534 | if (unlikely(!p)) | |
535 | goto out; | |
536 | p = xdr_decode_hyper(p, &args->wr_count); | |
537 | args->wr_writeverf.committed = be32_to_cpup(p); | |
538 | p = xdr_inline_decode(xdr, NFS4_VERIFIER_SIZE); | |
539 | if (likely(p)) { | |
540 | memcpy(&args->wr_writeverf.verifier.data[0], p, | |
541 | NFS4_VERIFIER_SIZE); | |
542 | return 0; | |
543 | } | |
544 | out: | |
545 | return htonl(NFS4ERR_RESOURCE); | |
546 | } | |
547 | ||
548 | static __be32 decode_offload_args(struct svc_rqst *rqstp, | |
549 | struct xdr_stream *xdr, | |
550 | void *data) | |
551 | { | |
552 | struct cb_offloadargs *args = data; | |
553 | __be32 *p; | |
554 | __be32 status; | |
555 | ||
556 | /* decode fh */ | |
557 | status = decode_fh(xdr, &args->coa_fh); | |
558 | if (unlikely(status != 0)) | |
559 | return status; | |
560 | ||
561 | /* decode stateid */ | |
562 | status = decode_stateid(xdr, &args->coa_stateid); | |
563 | if (unlikely(status != 0)) | |
564 | return status; | |
4aece6a1 | 565 | |
5178a125 | 566 | /* decode status */ |
eb72f484 | 567 | p = xdr_inline_decode(xdr, 4); |
5178a125 OK |
568 | if (unlikely(!p)) |
569 | goto out; | |
570 | args->error = ntohl(*p++); | |
571 | if (!args->error) { | |
572 | status = decode_write_response(xdr, args); | |
573 | if (unlikely(status != 0)) | |
574 | return status; | |
575 | } else { | |
576 | p = xdr_inline_decode(xdr, 8); | |
577 | if (unlikely(!p)) | |
578 | goto out; | |
579 | p = xdr_decode_hyper(p, &args->wr_count); | |
580 | } | |
581 | return 0; | |
582 | out: | |
583 | return htonl(NFS4ERR_RESOURCE); | |
584 | } | |
585 | #endif /* CONFIG_NFS_V4_2 */ | |
e6f684f6 | 586 | static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str) |
1da177e4 | 587 | { |
ab6e9aaf TM |
588 | if (unlikely(xdr_stream_encode_opaque(xdr, str, len) < 0)) |
589 | return cpu_to_be32(NFS4ERR_RESOURCE); | |
1da177e4 LT |
590 | return 0; |
591 | } | |
592 | ||
8b064946 | 593 | static __be32 encode_attr_bitmap(struct xdr_stream *xdr, const uint32_t *bitmap, size_t sz) |
1da177e4 | 594 | { |
8b064946 TM |
595 | if (xdr_stream_encode_uint32_array(xdr, bitmap, sz) < 0) |
596 | return cpu_to_be32(NFS4ERR_RESOURCE); | |
1da177e4 LT |
597 | return 0; |
598 | } | |
599 | ||
e6f684f6 | 600 | static __be32 encode_attr_change(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t change) |
1da177e4 | 601 | { |
5704fdeb | 602 | __be32 *p; |
1da177e4 LT |
603 | |
604 | if (!(bitmap[0] & FATTR4_WORD0_CHANGE)) | |
605 | return 0; | |
606 | p = xdr_reserve_space(xdr, 8); | |
90dc7d27 | 607 | if (unlikely(!p)) |
1da177e4 LT |
608 | return htonl(NFS4ERR_RESOURCE); |
609 | p = xdr_encode_hyper(p, change); | |
610 | return 0; | |
611 | } | |
612 | ||
e6f684f6 | 613 | static __be32 encode_attr_size(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t size) |
1da177e4 | 614 | { |
5704fdeb | 615 | __be32 *p; |
1da177e4 LT |
616 | |
617 | if (!(bitmap[0] & FATTR4_WORD0_SIZE)) | |
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, size); | |
623 | return 0; | |
624 | } | |
625 | ||
7d34ff51 | 626 | static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec64 *time) |
1da177e4 | 627 | { |
5704fdeb | 628 | __be32 *p; |
1da177e4 LT |
629 | |
630 | p = xdr_reserve_space(xdr, 12); | |
90dc7d27 | 631 | if (unlikely(!p)) |
1da177e4 LT |
632 | return htonl(NFS4ERR_RESOURCE); |
633 | p = xdr_encode_hyper(p, time->tv_sec); | |
634 | *p = htonl(time->tv_nsec); | |
635 | return 0; | |
636 | } | |
637 | ||
7d34ff51 | 638 | static __be32 encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec64 *time) |
1da177e4 LT |
639 | { |
640 | if (!(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) | |
641 | return 0; | |
642 | return encode_attr_time(xdr,time); | |
643 | } | |
644 | ||
7d34ff51 | 645 | static __be32 encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec64 *time) |
1da177e4 LT |
646 | { |
647 | if (!(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) | |
648 | return 0; | |
649 | return encode_attr_time(xdr,time); | |
650 | } | |
651 | ||
e6f684f6 | 652 | static __be32 encode_compound_hdr_res(struct xdr_stream *xdr, struct cb_compound_hdr_res *hdr) |
1da177e4 | 653 | { |
e6f684f6 | 654 | __be32 status; |
1da177e4 LT |
655 | |
656 | hdr->status = xdr_reserve_space(xdr, 4); | |
657 | if (unlikely(hdr->status == NULL)) | |
658 | return htonl(NFS4ERR_RESOURCE); | |
659 | status = encode_string(xdr, hdr->taglen, hdr->tag); | |
660 | if (unlikely(status != 0)) | |
661 | return status; | |
662 | hdr->nops = xdr_reserve_space(xdr, 4); | |
663 | if (unlikely(hdr->nops == NULL)) | |
664 | return htonl(NFS4ERR_RESOURCE); | |
665 | return 0; | |
666 | } | |
667 | ||
e6f684f6 | 668 | static __be32 encode_op_hdr(struct xdr_stream *xdr, uint32_t op, __be32 res) |
1da177e4 | 669 | { |
5704fdeb | 670 | __be32 *p; |
1da177e4 LT |
671 | |
672 | p = xdr_reserve_space(xdr, 8); | |
673 | if (unlikely(p == NULL)) | |
31d2b435 | 674 | return htonl(NFS4ERR_RESOURCE_HDR); |
1da177e4 LT |
675 | *p++ = htonl(op); |
676 | *p = res; | |
677 | return 0; | |
678 | } | |
679 | ||
f4dac4ad CH |
680 | static __be32 encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr, |
681 | const void *resp) | |
1da177e4 | 682 | { |
f4dac4ad | 683 | const struct cb_getattrres *res = resp; |
5704fdeb | 684 | __be32 *savep = NULL; |
e6f684f6 | 685 | __be32 status = res->status; |
1da177e4 LT |
686 | |
687 | if (unlikely(status != 0)) | |
688 | goto out; | |
8b064946 | 689 | status = encode_attr_bitmap(xdr, res->bitmap, ARRAY_SIZE(res->bitmap)); |
1da177e4 LT |
690 | if (unlikely(status != 0)) |
691 | goto out; | |
8b064946 TM |
692 | status = cpu_to_be32(NFS4ERR_RESOURCE); |
693 | savep = xdr_reserve_space(xdr, sizeof(*savep)); | |
694 | if (unlikely(!savep)) | |
695 | goto out; | |
1da177e4 LT |
696 | status = encode_attr_change(xdr, res->bitmap, res->change_attr); |
697 | if (unlikely(status != 0)) | |
698 | goto out; | |
699 | status = encode_attr_size(xdr, res->bitmap, res->size); | |
700 | if (unlikely(status != 0)) | |
701 | goto out; | |
702 | status = encode_attr_ctime(xdr, res->bitmap, &res->ctime); | |
703 | if (unlikely(status != 0)) | |
704 | goto out; | |
705 | status = encode_attr_mtime(xdr, res->bitmap, &res->mtime); | |
706 | *savep = htonl((unsigned int)((char *)xdr->p - (char *)(savep+1))); | |
707 | out: | |
1da177e4 LT |
708 | return status; |
709 | } | |
710 | ||
34bc47c9 BH |
711 | #if defined(CONFIG_NFS_V4_1) |
712 | ||
9733f0d9 | 713 | static __be32 encode_sessionid(struct xdr_stream *xdr, |
4aece6a1 BH |
714 | const struct nfs4_sessionid *sid) |
715 | { | |
9733f0d9 | 716 | __be32 *p; |
4aece6a1 | 717 | |
590184a6 | 718 | p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN); |
4aece6a1 BH |
719 | if (unlikely(p == NULL)) |
720 | return htonl(NFS4ERR_RESOURCE); | |
721 | ||
590184a6 | 722 | memcpy(p, sid, NFS4_MAX_SESSIONID_LEN); |
4aece6a1 BH |
723 | return 0; |
724 | } | |
725 | ||
9733f0d9 | 726 | static __be32 encode_cb_sequence_res(struct svc_rqst *rqstp, |
4aece6a1 | 727 | struct xdr_stream *xdr, |
f4dac4ad | 728 | const void *resp) |
4aece6a1 | 729 | { |
f4dac4ad | 730 | const struct cb_sequenceres *res = resp; |
9733f0d9 | 731 | __be32 *p; |
e216c8c7 | 732 | __be32 status = res->csr_status; |
4aece6a1 BH |
733 | |
734 | if (unlikely(status != 0)) | |
3d0bfaa6 | 735 | return status; |
4aece6a1 | 736 | |
e0a63c0b KM |
737 | status = encode_sessionid(xdr, &res->csr_sessionid); |
738 | if (status) | |
3d0bfaa6 | 739 | return status; |
4aece6a1 BH |
740 | |
741 | p = xdr_reserve_space(xdr, 4 * sizeof(uint32_t)); | |
742 | if (unlikely(p == NULL)) | |
743 | return htonl(NFS4ERR_RESOURCE); | |
744 | ||
745 | *p++ = htonl(res->csr_sequenceid); | |
746 | *p++ = htonl(res->csr_slotid); | |
747 | *p++ = htonl(res->csr_highestslotid); | |
748 | *p++ = htonl(res->csr_target_highestslotid); | |
3d0bfaa6 | 749 | return 0; |
4aece6a1 BH |
750 | } |
751 | ||
34bc47c9 BH |
752 | static __be32 |
753 | preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) | |
754 | { | |
281fe15d BH |
755 | if (op_nr == OP_CB_SEQUENCE) { |
756 | if (nop != 0) | |
757 | return htonl(NFS4ERR_SEQUENCE_POS); | |
758 | } else { | |
759 | if (nop == 0) | |
760 | return htonl(NFS4ERR_OP_NOT_IN_SESSION); | |
761 | } | |
762 | ||
34bc47c9 BH |
763 | switch (op_nr) { |
764 | case OP_CB_GETATTR: | |
765 | case OP_CB_RECALL: | |
4aece6a1 | 766 | case OP_CB_SEQUENCE: |
31f09607 | 767 | case OP_CB_RECALL_ANY: |
b9efa1b2 | 768 | case OP_CB_RECALL_SLOT: |
f2a62561 | 769 | case OP_CB_LAYOUTRECALL: |
1be5683b | 770 | case OP_CB_NOTIFY_DEVICEID: |
db783688 | 771 | case OP_CB_NOTIFY_LOCK: |
34bc47c9 BH |
772 | *op = &callback_ops[op_nr]; |
773 | break; | |
774 | ||
34bc47c9 BH |
775 | case OP_CB_NOTIFY: |
776 | case OP_CB_PUSH_DELEG: | |
34bc47c9 | 777 | case OP_CB_RECALLABLE_OBJ_AVAIL: |
34bc47c9 | 778 | case OP_CB_WANTS_CANCELLED: |
34bc47c9 BH |
779 | return htonl(NFS4ERR_NOTSUPP); |
780 | ||
781 | default: | |
782 | return htonl(NFS4ERR_OP_ILLEGAL); | |
783 | } | |
784 | ||
785 | return htonl(NFS_OK); | |
786 | } | |
787 | ||
810d82e6 TM |
788 | static void nfs4_callback_free_slot(struct nfs4_session *session, |
789 | struct nfs4_slot *slot) | |
42acd021 AA |
790 | { |
791 | struct nfs4_slot_table *tbl = &session->bc_slot_table; | |
792 | ||
793 | spin_lock(&tbl->slot_tbl_lock); | |
794 | /* | |
795 | * Let the state manager know callback processing done. | |
796 | * A single slot, so highest used slotid is either 0 or -1 | |
797 | */ | |
810d82e6 | 798 | nfs4_free_slot(tbl, slot); |
42acd021 AA |
799 | spin_unlock(&tbl->slot_tbl_lock); |
800 | } | |
801 | ||
55a67399 | 802 | static void nfs4_cb_free_slot(struct cb_process_state *cps) |
42acd021 | 803 | { |
810d82e6 TM |
804 | if (cps->slot) { |
805 | nfs4_callback_free_slot(cps->clp->cl_session, cps->slot); | |
806 | cps->slot = NULL; | |
807 | } | |
42acd021 AA |
808 | } |
809 | ||
34bc47c9 BH |
810 | #else /* CONFIG_NFS_V4_1 */ |
811 | ||
812 | static __be32 | |
813 | preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) | |
814 | { | |
815 | return htonl(NFS4ERR_MINOR_VERS_MISMATCH); | |
816 | } | |
817 | ||
55a67399 | 818 | static void nfs4_cb_free_slot(struct cb_process_state *cps) |
42acd021 AA |
819 | { |
820 | } | |
34bc47c9 BH |
821 | #endif /* CONFIG_NFS_V4_1 */ |
822 | ||
6b140b85 BS |
823 | #ifdef CONFIG_NFS_V4_2 |
824 | static __be32 | |
825 | preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op) | |
826 | { | |
827 | __be32 status = preprocess_nfs41_op(nop, op_nr, op); | |
828 | if (status != htonl(NFS4ERR_OP_ILLEGAL)) | |
829 | return status; | |
830 | ||
5178a125 OK |
831 | if (op_nr == OP_CB_OFFLOAD) { |
832 | *op = &callback_ops[op_nr]; | |
833 | return htonl(NFS_OK); | |
834 | } else | |
6b140b85 BS |
835 | return htonl(NFS4ERR_NOTSUPP); |
836 | return htonl(NFS4ERR_OP_ILLEGAL); | |
837 | } | |
838 | #else /* CONFIG_NFS_V4_2 */ | |
839 | static __be32 | |
840 | preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op) | |
841 | { | |
842 | return htonl(NFS4ERR_MINOR_VERS_MISMATCH); | |
843 | } | |
844 | #endif /* CONFIG_NFS_V4_2 */ | |
845 | ||
34bc47c9 BH |
846 | static __be32 |
847 | preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op) | |
848 | { | |
849 | switch (op_nr) { | |
850 | case OP_CB_GETATTR: | |
851 | case OP_CB_RECALL: | |
852 | *op = &callback_ops[op_nr]; | |
853 | break; | |
854 | default: | |
855 | return htonl(NFS4ERR_OP_ILLEGAL); | |
856 | } | |
857 | ||
858 | return htonl(NFS_OK); | |
859 | } | |
860 | ||
459de2ed | 861 | static __be32 process_op(int nop, struct svc_rqst *rqstp, |
9eff97ab | 862 | struct cb_process_state *cps) |
1da177e4 | 863 | { |
9eff97ab | 864 | struct xdr_stream *xdr_out = &rqstp->rq_res_stream; |
a162a6b8 | 865 | struct callback_op *op = &callback_ops[0]; |
31d2b435 | 866 | unsigned int op_nr; |
34bc47c9 | 867 | __be32 status; |
1da177e4 | 868 | long maxlen; |
e6f684f6 | 869 | __be32 res; |
1da177e4 | 870 | |
9eff97ab | 871 | status = decode_op_hdr(&rqstp->rq_arg_stream, &op_nr); |
31d2b435 AA |
872 | if (unlikely(status)) |
873 | return status; | |
1da177e4 | 874 | |
6b140b85 BS |
875 | switch (cps->minorversion) { |
876 | case 0: | |
877 | status = preprocess_nfs4_op(op_nr, &op); | |
878 | break; | |
879 | case 1: | |
880 | status = preprocess_nfs41_op(nop, op_nr, &op); | |
881 | break; | |
882 | case 2: | |
883 | status = preprocess_nfs42_op(nop, op_nr, &op); | |
884 | break; | |
885 | default: | |
886 | status = htonl(NFS4ERR_MINOR_VERS_MISMATCH); | |
887 | } | |
34bc47c9 | 888 | |
34bc47c9 BH |
889 | if (status == htonl(NFS4ERR_OP_ILLEGAL)) |
890 | op_nr = OP_CB_ILLEGAL; | |
b92b3019 AA |
891 | if (status) |
892 | goto encode_hdr; | |
31d2b435 | 893 | |
c36fca52 AA |
894 | if (cps->drc_status) { |
895 | status = cps->drc_status; | |
4911096f AA |
896 | goto encode_hdr; |
897 | } | |
898 | ||
1da177e4 LT |
899 | maxlen = xdr_out->end - xdr_out->p; |
900 | if (maxlen > 0 && maxlen < PAGE_SIZE) { | |
9eff97ab CL |
901 | status = op->decode_args(rqstp, &rqstp->rq_arg_stream, |
902 | rqstp->rq_argp); | |
e95e60da | 903 | if (likely(status == 0)) |
9eff97ab CL |
904 | status = op->process_op(rqstp->rq_argp, rqstp->rq_resp, |
905 | cps); | |
1da177e4 LT |
906 | } else |
907 | status = htonl(NFS4ERR_RESOURCE); | |
908 | ||
b92b3019 | 909 | encode_hdr: |
1da177e4 | 910 | res = encode_op_hdr(xdr_out, op_nr, status); |
31d2b435 AA |
911 | if (unlikely(res)) |
912 | return res; | |
1da177e4 | 913 | if (op->encode_res != NULL && status == 0) |
9eff97ab | 914 | status = op->encode_res(rqstp, xdr_out, rqstp->rq_resp); |
1da177e4 LT |
915 | return status; |
916 | } | |
917 | ||
918 | /* | |
919 | * Decode, process and encode a COMPOUND | |
920 | */ | |
a6beb732 | 921 | static __be32 nfs4_callback_compound(struct svc_rqst *rqstp) |
1da177e4 | 922 | { |
3a6258e1 TM |
923 | struct cb_compound_hdr_arg hdr_arg = { 0 }; |
924 | struct cb_compound_hdr_res hdr_res = { NULL }; | |
c36fca52 AA |
925 | struct cb_process_state cps = { |
926 | .drc_status = 0, | |
927 | .clp = NULL, | |
9695c705 | 928 | .net = SVC_NET(rqstp), |
c36fca52 | 929 | }; |
3a6258e1 | 930 | unsigned int nops = 0; |
89ef17b6 | 931 | __be32 status; |
1da177e4 | 932 | |
89ef17b6 | 933 | status = decode_compound_hdr_arg(&rqstp->rq_arg_stream, &hdr_arg); |
4ed0d83d | 934 | if (status == htonl(NFS4ERR_RESOURCE)) |
3a6258e1 TM |
935 | return rpc_garbage_args; |
936 | ||
c36fca52 | 937 | if (hdr_arg.minorversion == 0) { |
9695c705 | 938 | cps.clp = nfs4_find_client_ident(SVC_NET(rqstp), hdr_arg.cb_ident); |
2bb50aab CL |
939 | if (!cps.clp) { |
940 | trace_nfs_cb_no_clp(rqstp->rq_xid, hdr_arg.cb_ident); | |
941 | goto out_invalidcred; | |
942 | } | |
943 | if (!check_gss_callback_principal(cps.clp, rqstp)) { | |
944 | trace_nfs_cb_badprinc(rqstp->rq_xid, hdr_arg.cb_ident); | |
945 | nfs_put_client(cps.clp); | |
a4e187d8 | 946 | goto out_invalidcred; |
32cd3ee5 | 947 | } |
778be232 | 948 | } |
c36fca52 | 949 | |
459de2ed | 950 | cps.minorversion = hdr_arg.minorversion; |
1da177e4 LT |
951 | hdr_res.taglen = hdr_arg.taglen; |
952 | hdr_res.tag = hdr_arg.tag; | |
89ef17b6 | 953 | if (encode_compound_hdr_res(&rqstp->rq_res_stream, &hdr_res) != 0) { |
32cd3ee5 OK |
954 | if (cps.clp) |
955 | nfs_put_client(cps.clp); | |
3a6258e1 | 956 | return rpc_system_err; |
32cd3ee5 | 957 | } |
3a6258e1 | 958 | while (status == 0 && nops != hdr_arg.nops) { |
9eff97ab | 959 | status = process_op(nops, rqstp, &cps); |
1da177e4 LT |
960 | nops++; |
961 | } | |
3a6258e1 | 962 | |
31d2b435 AA |
963 | /* Buffer overflow in decode_ops_hdr or encode_ops_hdr. Return |
964 | * resource error in cb_compound status without returning op */ | |
965 | if (unlikely(status == htonl(NFS4ERR_RESOURCE_HDR))) { | |
966 | status = htonl(NFS4ERR_RESOURCE); | |
967 | nops--; | |
968 | } | |
969 | ||
1da177e4 LT |
970 | *hdr_res.status = status; |
971 | *hdr_res.nops = htonl(nops); | |
55a67399 | 972 | nfs4_cb_free_slot(&cps); |
c36fca52 | 973 | nfs_put_client(cps.clp); |
1da177e4 | 974 | return rpc_success; |
a4e187d8 CL |
975 | |
976 | out_invalidcred: | |
977 | pr_warn_ratelimited("NFS: NFSv4 callback contains invalid cred\n"); | |
9082e1d9 CL |
978 | rqstp->rq_auth_stat = rpc_autherr_badcred; |
979 | return rpc_success; | |
1da177e4 LT |
980 | } |
981 | ||
7d34c962 CL |
982 | static int |
983 | nfs_callback_dispatch(struct svc_rqst *rqstp, __be32 *statp) | |
984 | { | |
985 | const struct svc_procedure *procp = rqstp->rq_procinfo; | |
986 | ||
89ef17b6 CL |
987 | svcxdr_init_decode(rqstp); |
988 | svcxdr_init_encode(rqstp); | |
989 | ||
7d34c962 CL |
990 | *statp = procp->pc_func(rqstp); |
991 | return 1; | |
992 | } | |
993 | ||
1da177e4 LT |
994 | /* |
995 | * Define NFS4 callback COMPOUND ops. | |
996 | */ | |
997 | static struct callback_op callback_ops[] = { | |
998 | [0] = { | |
999 | .res_maxsize = CB_OP_HDR_RES_MAXSZ, | |
1000 | }, | |
1001 | [OP_CB_GETATTR] = { | |
f4dac4ad CH |
1002 | .process_op = nfs4_callback_getattr, |
1003 | .decode_args = decode_getattr_args, | |
1004 | .encode_res = encode_getattr_res, | |
1da177e4 LT |
1005 | .res_maxsize = CB_OP_GETATTR_RES_MAXSZ, |
1006 | }, | |
1007 | [OP_CB_RECALL] = { | |
f4dac4ad CH |
1008 | .process_op = nfs4_callback_recall, |
1009 | .decode_args = decode_recall_args, | |
1da177e4 | 1010 | .res_maxsize = CB_OP_RECALL_RES_MAXSZ, |
4aece6a1 BH |
1011 | }, |
1012 | #if defined(CONFIG_NFS_V4_1) | |
f2a62561 | 1013 | [OP_CB_LAYOUTRECALL] = { |
f4dac4ad CH |
1014 | .process_op = nfs4_callback_layoutrecall, |
1015 | .decode_args = decode_layoutrecall_args, | |
f2a62561 FI |
1016 | .res_maxsize = CB_OP_LAYOUTRECALL_RES_MAXSZ, |
1017 | }, | |
1be5683b | 1018 | [OP_CB_NOTIFY_DEVICEID] = { |
f4dac4ad CH |
1019 | .process_op = nfs4_callback_devicenotify, |
1020 | .decode_args = decode_devicenotify_args, | |
1be5683b ME |
1021 | .res_maxsize = CB_OP_DEVICENOTIFY_RES_MAXSZ, |
1022 | }, | |
4aece6a1 | 1023 | [OP_CB_SEQUENCE] = { |
f4dac4ad CH |
1024 | .process_op = nfs4_callback_sequence, |
1025 | .decode_args = decode_cb_sequence_args, | |
1026 | .encode_res = encode_cb_sequence_res, | |
4aece6a1 BH |
1027 | .res_maxsize = CB_OP_SEQUENCE_RES_MAXSZ, |
1028 | }, | |
31f09607 | 1029 | [OP_CB_RECALL_ANY] = { |
f4dac4ad CH |
1030 | .process_op = nfs4_callback_recallany, |
1031 | .decode_args = decode_recallany_args, | |
31f09607 AB |
1032 | .res_maxsize = CB_OP_RECALLANY_RES_MAXSZ, |
1033 | }, | |
b9efa1b2 | 1034 | [OP_CB_RECALL_SLOT] = { |
f4dac4ad CH |
1035 | .process_op = nfs4_callback_recallslot, |
1036 | .decode_args = decode_recallslot_args, | |
b9efa1b2 AA |
1037 | .res_maxsize = CB_OP_RECALLSLOT_RES_MAXSZ, |
1038 | }, | |
db783688 | 1039 | [OP_CB_NOTIFY_LOCK] = { |
f4dac4ad CH |
1040 | .process_op = nfs4_callback_notify_lock, |
1041 | .decode_args = decode_notify_lock_args, | |
db783688 JL |
1042 | .res_maxsize = CB_OP_NOTIFY_LOCK_RES_MAXSZ, |
1043 | }, | |
4aece6a1 | 1044 | #endif /* CONFIG_NFS_V4_1 */ |
5178a125 OK |
1045 | #ifdef CONFIG_NFS_V4_2 |
1046 | [OP_CB_OFFLOAD] = { | |
1047 | .process_op = nfs4_callback_offload, | |
1048 | .decode_args = decode_offload_args, | |
1049 | .res_maxsize = CB_OP_OFFLOAD_RES_MAXSZ, | |
1050 | }, | |
1051 | #endif /* CONFIG_NFS_V4_2 */ | |
1da177e4 LT |
1052 | }; |
1053 | ||
1054 | /* | |
1055 | * Define NFS4 callback procedures | |
1056 | */ | |
860bda29 | 1057 | static const struct svc_procedure nfs4_callback_procedures1[] = { |
1da177e4 LT |
1058 | [CB_NULL] = { |
1059 | .pc_func = nfs4_callback_null, | |
63f8de37 | 1060 | .pc_encode = nfs4_encode_void, |
1da177e4 | 1061 | .pc_xdrressize = 1, |
2289e87b | 1062 | .pc_name = "NULL", |
1da177e4 LT |
1063 | }, |
1064 | [CB_COMPOUND] = { | |
1065 | .pc_func = nfs4_callback_compound, | |
63f8de37 | 1066 | .pc_encode = nfs4_encode_void, |
1da177e4 LT |
1067 | .pc_argsize = 256, |
1068 | .pc_ressize = 256, | |
1069 | .pc_xdrressize = NFS4_CALLBACK_BUFSIZE, | |
2289e87b | 1070 | .pc_name = "COMPOUND", |
1da177e4 LT |
1071 | } |
1072 | }; | |
1073 | ||
7fd38af9 | 1074 | static unsigned int nfs4_callback_count1[ARRAY_SIZE(nfs4_callback_procedures1)]; |
e9679189 | 1075 | const struct svc_version nfs4_callback_version1 = { |
1da177e4 LT |
1076 | .vs_vers = 1, |
1077 | .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), | |
1078 | .vs_proc = nfs4_callback_procedures1, | |
7fd38af9 | 1079 | .vs_count = nfs4_callback_count1, |
1da177e4 | 1080 | .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, |
7d34c962 | 1081 | .vs_dispatch = nfs_callback_dispatch, |
05a45a2d | 1082 | .vs_hidden = true, |
5283b03e | 1083 | .vs_need_cong_ctrl = true, |
1da177e4 LT |
1084 | }; |
1085 | ||
7fd38af9 | 1086 | static unsigned int nfs4_callback_count4[ARRAY_SIZE(nfs4_callback_procedures1)]; |
e9679189 | 1087 | const struct svc_version nfs4_callback_version4 = { |
07bccc2d AB |
1088 | .vs_vers = 4, |
1089 | .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), | |
1090 | .vs_proc = nfs4_callback_procedures1, | |
7fd38af9 | 1091 | .vs_count = nfs4_callback_count4, |
07bccc2d | 1092 | .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, |
7d34c962 | 1093 | .vs_dispatch = nfs_callback_dispatch, |
05a45a2d | 1094 | .vs_hidden = true, |
5283b03e | 1095 | .vs_need_cong_ctrl = true, |
07bccc2d | 1096 | }; |