Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/nfs/callback_xdr.c | |
3 | * | |
4 | * Copyright (C) 2004 Trond Myklebust | |
5 | * | |
6 | * NFSv4 callback encode/decode procedures | |
7 | */ | |
1da177e4 LT |
8 | #include <linux/kernel.h> |
9 | #include <linux/sunrpc/svc.h> | |
10 | #include <linux/nfs4.h> | |
11 | #include <linux/nfs_fs.h> | |
9a3ba432 TM |
12 | #include <linux/ratelimit.h> |
13 | #include <linux/printk.h> | |
5a0e3ad6 | 14 | #include <linux/slab.h> |
c36fca52 | 15 | #include <linux/sunrpc/bc_xprt.h> |
4ce79717 | 16 | #include "nfs4_fs.h" |
1da177e4 | 17 | #include "callback.h" |
c36fca52 | 18 | #include "internal.h" |
76e697ba | 19 | #include "nfs4session.h" |
1da177e4 | 20 | |
45724e8a KM |
21 | #define CB_OP_TAGLEN_MAXSZ (512) |
22 | #define CB_OP_HDR_RES_MAXSZ (2 * 4) // opcode, status | |
23 | #define CB_OP_GETATTR_BITMAP_MAXSZ (4 * 4) // bitmap length, 3 bitmaps | |
24 | #define CB_OP_GETATTR_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \ | |
25 | CB_OP_GETATTR_BITMAP_MAXSZ + \ | |
26 | /* change, size, ctime, mtime */\ | |
27 | (2 + 2 + 3 + 3) * 4) | |
28 | #define CB_OP_RECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) | |
1da177e4 | 29 | |
4aece6a1 | 30 | #if defined(CONFIG_NFS_V4_1) |
f2a62561 | 31 | #define CB_OP_LAYOUTRECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
1be5683b | 32 | #define CB_OP_DEVICENOTIFY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
4aece6a1 | 33 | #define CB_OP_SEQUENCE_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \ |
45724e8a KM |
34 | NFS4_MAX_SESSIONID_LEN + \ |
35 | (1 + 3) * 4) // seqid, 3 slotids | |
31f09607 | 36 | #define CB_OP_RECALLANY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
b9efa1b2 | 37 | #define CB_OP_RECALLSLOT_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
4aece6a1 BH |
38 | #endif /* CONFIG_NFS_V4_1 */ |
39 | ||
1da177e4 LT |
40 | #define NFSDBG_FACILITY NFSDBG_CALLBACK |
41 | ||
31d2b435 AA |
42 | /* Internal error code */ |
43 | #define NFS4ERR_RESOURCE_HDR 11050 | |
44 | ||
c36fca52 AA |
45 | typedef __be32 (*callback_process_op_t)(void *, void *, |
46 | struct cb_process_state *); | |
e6f684f6 AV |
47 | typedef __be32 (*callback_decode_arg_t)(struct svc_rqst *, struct xdr_stream *, void *); |
48 | typedef __be32 (*callback_encode_res_t)(struct svc_rqst *, struct xdr_stream *, void *); | |
1da177e4 LT |
49 | |
50 | ||
51 | struct callback_op { | |
52 | callback_process_op_t process_op; | |
53 | callback_decode_arg_t decode_args; | |
54 | callback_encode_res_t encode_res; | |
55 | long res_maxsize; | |
56 | }; | |
57 | ||
58 | static struct callback_op callback_ops[]; | |
59 | ||
7111c66e | 60 | static __be32 nfs4_callback_null(struct svc_rqst *rqstp, void *argp, void *resp) |
1da177e4 LT |
61 | { |
62 | return htonl(NFS4_OK); | |
63 | } | |
64 | ||
5704fdeb | 65 | static int nfs4_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
1da177e4 LT |
66 | { |
67 | return xdr_argsize_check(rqstp, p); | |
68 | } | |
69 | ||
5704fdeb | 70 | static int nfs4_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
1da177e4 LT |
71 | { |
72 | return xdr_ressize_check(rqstp, p); | |
73 | } | |
74 | ||
5704fdeb | 75 | static __be32 *read_buf(struct xdr_stream *xdr, int 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 | ||
e6f684f6 | 85 | static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len, const char **str) |
1da177e4 | 86 | { |
5704fdeb | 87 | __be32 *p; |
1da177e4 LT |
88 | |
89 | p = read_buf(xdr, 4); | |
90 | if (unlikely(p == NULL)) | |
91 | return htonl(NFS4ERR_RESOURCE); | |
92 | *len = ntohl(*p); | |
93 | ||
94 | if (*len != 0) { | |
95 | p = read_buf(xdr, *len); | |
96 | if (unlikely(p == NULL)) | |
97 | return htonl(NFS4ERR_RESOURCE); | |
98 | *str = (const char *)p; | |
99 | } else | |
100 | *str = NULL; | |
101 | ||
102 | return 0; | |
103 | } | |
104 | ||
e6f684f6 | 105 | static __be32 decode_fh(struct xdr_stream *xdr, struct nfs_fh *fh) |
1da177e4 | 106 | { |
5704fdeb | 107 | __be32 *p; |
1da177e4 LT |
108 | |
109 | p = read_buf(xdr, 4); | |
110 | if (unlikely(p == NULL)) | |
111 | return htonl(NFS4ERR_RESOURCE); | |
112 | fh->size = ntohl(*p); | |
113 | if (fh->size > NFS4_FHSIZE) | |
114 | return htonl(NFS4ERR_BADHANDLE); | |
115 | p = read_buf(xdr, fh->size); | |
116 | if (unlikely(p == NULL)) | |
117 | return htonl(NFS4ERR_RESOURCE); | |
118 | memcpy(&fh->data[0], p, fh->size); | |
119 | memset(&fh->data[fh->size], 0, sizeof(fh->data) - fh->size); | |
120 | return 0; | |
121 | } | |
122 | ||
e6f684f6 | 123 | static __be32 decode_bitmap(struct xdr_stream *xdr, uint32_t *bitmap) |
1da177e4 | 124 | { |
5704fdeb | 125 | __be32 *p; |
1da177e4 LT |
126 | unsigned int attrlen; |
127 | ||
128 | p = read_buf(xdr, 4); | |
129 | if (unlikely(p == NULL)) | |
130 | return htonl(NFS4ERR_RESOURCE); | |
131 | attrlen = ntohl(*p); | |
132 | p = read_buf(xdr, attrlen << 2); | |
133 | if (unlikely(p == NULL)) | |
134 | return htonl(NFS4ERR_RESOURCE); | |
135 | if (likely(attrlen > 0)) | |
136 | bitmap[0] = ntohl(*p++); | |
137 | if (attrlen > 1) | |
138 | bitmap[1] = ntohl(*p); | |
139 | return 0; | |
140 | } | |
141 | ||
e6f684f6 | 142 | static __be32 decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) |
1da177e4 | 143 | { |
5704fdeb | 144 | __be32 *p; |
1da177e4 | 145 | |
2d2f24ad | 146 | p = read_buf(xdr, NFS4_STATEID_SIZE); |
1da177e4 LT |
147 | if (unlikely(p == NULL)) |
148 | return htonl(NFS4ERR_RESOURCE); | |
93b717fd | 149 | memcpy(stateid->data, p, NFS4_STATEID_SIZE); |
1da177e4 LT |
150 | return 0; |
151 | } | |
152 | ||
93b717fd TM |
153 | static __be32 decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) |
154 | { | |
155 | stateid->type = NFS4_DELEGATION_STATEID_TYPE; | |
156 | return decode_stateid(xdr, stateid); | |
157 | } | |
158 | ||
e6f684f6 | 159 | static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound_hdr_arg *hdr) |
1da177e4 | 160 | { |
5704fdeb | 161 | __be32 *p; |
e6f684f6 | 162 | __be32 status; |
1da177e4 LT |
163 | |
164 | status = decode_string(xdr, &hdr->taglen, &hdr->tag); | |
165 | if (unlikely(status != 0)) | |
166 | return status; | |
167 | /* We do not like overly long tags! */ | |
403889c0 | 168 | if (hdr->taglen > CB_OP_TAGLEN_MAXSZ) { |
a030889a | 169 | printk("NFS: NFSv4 CALLBACK %s: client sent tag of length %u\n", |
3110ff80 | 170 | __func__, hdr->taglen); |
1da177e4 LT |
171 | return htonl(NFS4ERR_RESOURCE); |
172 | } | |
173 | p = read_buf(xdr, 12); | |
174 | if (unlikely(p == NULL)) | |
175 | return htonl(NFS4ERR_RESOURCE); | |
b8f2ef84 | 176 | hdr->minorversion = ntohl(*p++); |
459de2ed BS |
177 | /* Check for minor version support */ |
178 | if (hdr->minorversion <= NFS4_MAX_MINOR_VERSION) { | |
42c2c424 | 179 | hdr->cb_ident = ntohl(*p++); /* ignored by v4.1 and v4.2 */ |
48a9e2d2 | 180 | } else { |
9a3ba432 | 181 | pr_warn_ratelimited("NFS: %s: NFSv4 server callback with " |
b8f2ef84 BH |
182 | "illegal minor version %u!\n", |
183 | __func__, hdr->minorversion); | |
1da177e4 LT |
184 | return htonl(NFS4ERR_MINOR_VERS_MISMATCH); |
185 | } | |
1da177e4 | 186 | hdr->nops = ntohl(*p); |
b8f2ef84 BH |
187 | dprintk("%s: minorversion %d nops %d\n", __func__, |
188 | hdr->minorversion, hdr->nops); | |
1da177e4 LT |
189 | return 0; |
190 | } | |
191 | ||
e6f684f6 | 192 | static __be32 decode_op_hdr(struct xdr_stream *xdr, unsigned int *op) |
1da177e4 | 193 | { |
5704fdeb | 194 | __be32 *p; |
1da177e4 LT |
195 | p = read_buf(xdr, 4); |
196 | if (unlikely(p == NULL)) | |
31d2b435 | 197 | return htonl(NFS4ERR_RESOURCE_HDR); |
1da177e4 LT |
198 | *op = ntohl(*p); |
199 | return 0; | |
200 | } | |
201 | ||
e6f684f6 | 202 | static __be32 decode_getattr_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_getattrargs *args) |
1da177e4 | 203 | { |
e6f684f6 | 204 | __be32 status; |
1da177e4 LT |
205 | |
206 | status = decode_fh(xdr, &args->fh); | |
207 | if (unlikely(status != 0)) | |
208 | goto out; | |
1da177e4 LT |
209 | status = decode_bitmap(xdr, args->bitmap); |
210 | out: | |
3110ff80 | 211 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); |
1da177e4 LT |
212 | return status; |
213 | } | |
214 | ||
e6f684f6 | 215 | static __be32 decode_recall_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_recallargs *args) |
1da177e4 | 216 | { |
5704fdeb | 217 | __be32 *p; |
e6f684f6 | 218 | __be32 status; |
1da177e4 | 219 | |
93b717fd | 220 | status = decode_delegation_stateid(xdr, &args->stateid); |
1da177e4 LT |
221 | if (unlikely(status != 0)) |
222 | goto out; | |
223 | p = read_buf(xdr, 4); | |
224 | if (unlikely(p == NULL)) { | |
225 | status = htonl(NFS4ERR_RESOURCE); | |
226 | goto out; | |
227 | } | |
228 | args->truncate = ntohl(*p); | |
229 | status = decode_fh(xdr, &args->fh); | |
230 | out: | |
3110ff80 | 231 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); |
3873bc50 | 232 | return status; |
1da177e4 LT |
233 | } |
234 | ||
4aece6a1 | 235 | #if defined(CONFIG_NFS_V4_1) |
93b717fd TM |
236 | static __be32 decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) |
237 | { | |
238 | stateid->type = NFS4_LAYOUT_STATEID_TYPE; | |
239 | return decode_stateid(xdr, stateid); | |
240 | } | |
4aece6a1 | 241 | |
f2a62561 FI |
242 | static __be32 decode_layoutrecall_args(struct svc_rqst *rqstp, |
243 | struct xdr_stream *xdr, | |
244 | struct cb_layoutrecallargs *args) | |
245 | { | |
246 | __be32 *p; | |
247 | __be32 status = 0; | |
248 | uint32_t iomode; | |
249 | ||
f2a62561 FI |
250 | p = read_buf(xdr, 4 * sizeof(uint32_t)); |
251 | if (unlikely(p == NULL)) { | |
252 | status = htonl(NFS4ERR_BADXDR); | |
253 | goto out; | |
254 | } | |
255 | ||
256 | args->cbl_layout_type = ntohl(*p++); | |
257 | /* Depite the spec's xdr, iomode really belongs in the FILE switch, | |
25985edc | 258 | * as it is unusable and ignored with the other types. |
f2a62561 FI |
259 | */ |
260 | iomode = ntohl(*p++); | |
261 | args->cbl_layoutchanged = ntohl(*p++); | |
262 | args->cbl_recall_type = ntohl(*p++); | |
263 | ||
264 | if (args->cbl_recall_type == RETURN_FILE) { | |
265 | args->cbl_range.iomode = iomode; | |
266 | status = decode_fh(xdr, &args->cbl_fh); | |
267 | if (unlikely(status != 0)) | |
268 | goto out; | |
269 | ||
270 | p = read_buf(xdr, 2 * sizeof(uint64_t)); | |
271 | if (unlikely(p == NULL)) { | |
272 | status = htonl(NFS4ERR_BADXDR); | |
273 | goto out; | |
274 | } | |
275 | p = xdr_decode_hyper(p, &args->cbl_range.offset); | |
276 | p = xdr_decode_hyper(p, &args->cbl_range.length); | |
93b717fd | 277 | status = decode_layout_stateid(xdr, &args->cbl_stateid); |
f2a62561 FI |
278 | if (unlikely(status != 0)) |
279 | goto out; | |
280 | } else if (args->cbl_recall_type == RETURN_FSID) { | |
281 | p = read_buf(xdr, 2 * sizeof(uint64_t)); | |
282 | if (unlikely(p == NULL)) { | |
283 | status = htonl(NFS4ERR_BADXDR); | |
284 | goto out; | |
285 | } | |
286 | p = xdr_decode_hyper(p, &args->cbl_fsid.major); | |
287 | p = xdr_decode_hyper(p, &args->cbl_fsid.minor); | |
288 | } else if (args->cbl_recall_type != RETURN_ALL) { | |
289 | status = htonl(NFS4ERR_BADXDR); | |
290 | goto out; | |
291 | } | |
292 | dprintk("%s: ltype 0x%x iomode %d changed %d recall_type %d\n", | |
293 | __func__, | |
294 | args->cbl_layout_type, iomode, | |
295 | args->cbl_layoutchanged, args->cbl_recall_type); | |
296 | out: | |
297 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); | |
298 | return status; | |
299 | } | |
300 | ||
1be5683b ME |
301 | static |
302 | __be32 decode_devicenotify_args(struct svc_rqst *rqstp, | |
303 | struct xdr_stream *xdr, | |
304 | struct cb_devicenotifyargs *args) | |
305 | { | |
306 | __be32 *p; | |
307 | __be32 status = 0; | |
308 | u32 tmp; | |
309 | int n, i; | |
310 | args->ndevs = 0; | |
311 | ||
312 | /* Num of device notifications */ | |
313 | p = read_buf(xdr, sizeof(uint32_t)); | |
314 | if (unlikely(p == NULL)) { | |
315 | status = htonl(NFS4ERR_BADXDR); | |
316 | goto out; | |
317 | } | |
318 | n = ntohl(*p++); | |
319 | if (n <= 0) | |
320 | goto out; | |
363e0df0 DC |
321 | if (n > ULONG_MAX / sizeof(*args->devs)) { |
322 | status = htonl(NFS4ERR_BADXDR); | |
323 | goto out; | |
324 | } | |
1be5683b | 325 | |
a4f743a6 | 326 | args->devs = kmalloc_array(n, sizeof(*args->devs), GFP_KERNEL); |
1be5683b ME |
327 | if (!args->devs) { |
328 | status = htonl(NFS4ERR_DELAY); | |
329 | goto out; | |
330 | } | |
331 | ||
332 | /* Decode each dev notification */ | |
333 | for (i = 0; i < n; i++) { | |
334 | struct cb_devicenotifyitem *dev = &args->devs[i]; | |
335 | ||
336 | p = read_buf(xdr, (4 * sizeof(uint32_t)) + NFS4_DEVICEID4_SIZE); | |
337 | if (unlikely(p == NULL)) { | |
338 | status = htonl(NFS4ERR_BADXDR); | |
339 | goto err; | |
340 | } | |
341 | ||
342 | tmp = ntohl(*p++); /* bitmap size */ | |
343 | if (tmp != 1) { | |
344 | status = htonl(NFS4ERR_INVAL); | |
345 | goto err; | |
346 | } | |
347 | dev->cbd_notify_type = ntohl(*p++); | |
348 | if (dev->cbd_notify_type != NOTIFY_DEVICEID4_CHANGE && | |
349 | dev->cbd_notify_type != NOTIFY_DEVICEID4_DELETE) { | |
350 | status = htonl(NFS4ERR_INVAL); | |
351 | goto err; | |
352 | } | |
353 | ||
354 | tmp = ntohl(*p++); /* opaque size */ | |
355 | if (((dev->cbd_notify_type == NOTIFY_DEVICEID4_CHANGE) && | |
356 | (tmp != NFS4_DEVICEID4_SIZE + 8)) || | |
357 | ((dev->cbd_notify_type == NOTIFY_DEVICEID4_DELETE) && | |
358 | (tmp != NFS4_DEVICEID4_SIZE + 4))) { | |
359 | status = htonl(NFS4ERR_INVAL); | |
360 | goto err; | |
361 | } | |
362 | dev->cbd_layout_type = ntohl(*p++); | |
363 | memcpy(dev->cbd_dev_id.data, p, NFS4_DEVICEID4_SIZE); | |
364 | p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE); | |
365 | ||
366 | if (dev->cbd_layout_type == NOTIFY_DEVICEID4_CHANGE) { | |
367 | p = read_buf(xdr, sizeof(uint32_t)); | |
368 | if (unlikely(p == NULL)) { | |
369 | status = htonl(NFS4ERR_BADXDR); | |
370 | goto err; | |
371 | } | |
372 | dev->cbd_immediate = ntohl(*p++); | |
373 | } else { | |
374 | dev->cbd_immediate = 0; | |
375 | } | |
376 | ||
377 | args->ndevs++; | |
378 | ||
379 | dprintk("%s: type %d layout 0x%x immediate %d\n", | |
380 | __func__, dev->cbd_notify_type, dev->cbd_layout_type, | |
381 | dev->cbd_immediate); | |
382 | } | |
383 | out: | |
384 | dprintk("%s: status %d ndevs %d\n", | |
385 | __func__, ntohl(status), args->ndevs); | |
386 | return status; | |
387 | err: | |
388 | kfree(args->devs); | |
389 | goto out; | |
390 | } | |
391 | ||
9733f0d9 | 392 | static __be32 decode_sessionid(struct xdr_stream *xdr, |
4aece6a1 BH |
393 | struct nfs4_sessionid *sid) |
394 | { | |
9733f0d9 | 395 | __be32 *p; |
4aece6a1 | 396 | |
590184a6 | 397 | p = read_buf(xdr, NFS4_MAX_SESSIONID_LEN); |
4aece6a1 | 398 | if (unlikely(p == NULL)) |
a419aef8 | 399 | return htonl(NFS4ERR_RESOURCE); |
4aece6a1 | 400 | |
590184a6 | 401 | memcpy(sid->data, p, NFS4_MAX_SESSIONID_LEN); |
4aece6a1 BH |
402 | return 0; |
403 | } | |
404 | ||
9733f0d9 | 405 | static __be32 decode_rc_list(struct xdr_stream *xdr, |
4aece6a1 BH |
406 | struct referring_call_list *rc_list) |
407 | { | |
9733f0d9 | 408 | __be32 *p; |
4aece6a1 | 409 | int i; |
9733f0d9 | 410 | __be32 status; |
4aece6a1 BH |
411 | |
412 | status = decode_sessionid(xdr, &rc_list->rcl_sessionid); | |
413 | if (status) | |
414 | goto out; | |
415 | ||
416 | status = htonl(NFS4ERR_RESOURCE); | |
417 | p = read_buf(xdr, sizeof(uint32_t)); | |
418 | if (unlikely(p == NULL)) | |
419 | goto out; | |
420 | ||
421 | rc_list->rcl_nrefcalls = ntohl(*p++); | |
422 | if (rc_list->rcl_nrefcalls) { | |
423 | p = read_buf(xdr, | |
424 | rc_list->rcl_nrefcalls * 2 * sizeof(uint32_t)); | |
425 | if (unlikely(p == NULL)) | |
426 | goto out; | |
a4f743a6 | 427 | rc_list->rcl_refcalls = kmalloc_array(rc_list->rcl_nrefcalls, |
4aece6a1 BH |
428 | sizeof(*rc_list->rcl_refcalls), |
429 | GFP_KERNEL); | |
430 | if (unlikely(rc_list->rcl_refcalls == NULL)) | |
431 | goto out; | |
432 | for (i = 0; i < rc_list->rcl_nrefcalls; i++) { | |
433 | rc_list->rcl_refcalls[i].rc_sequenceid = ntohl(*p++); | |
434 | rc_list->rcl_refcalls[i].rc_slotid = ntohl(*p++); | |
435 | } | |
436 | } | |
437 | status = 0; | |
438 | ||
439 | out: | |
440 | return status; | |
441 | } | |
442 | ||
9733f0d9 | 443 | static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp, |
4aece6a1 BH |
444 | struct xdr_stream *xdr, |
445 | struct cb_sequenceargs *args) | |
446 | { | |
9733f0d9 | 447 | __be32 *p; |
4aece6a1 | 448 | int i; |
9733f0d9 | 449 | __be32 status; |
4aece6a1 BH |
450 | |
451 | status = decode_sessionid(xdr, &args->csa_sessionid); | |
452 | if (status) | |
453 | goto out; | |
454 | ||
455 | status = htonl(NFS4ERR_RESOURCE); | |
456 | p = read_buf(xdr, 5 * sizeof(uint32_t)); | |
457 | if (unlikely(p == NULL)) | |
458 | goto out; | |
459 | ||
65fc64e5 | 460 | args->csa_addr = svc_addr(rqstp); |
4aece6a1 BH |
461 | args->csa_sequenceid = ntohl(*p++); |
462 | args->csa_slotid = ntohl(*p++); | |
463 | args->csa_highestslotid = ntohl(*p++); | |
464 | args->csa_cachethis = ntohl(*p++); | |
465 | args->csa_nrclists = ntohl(*p++); | |
466 | args->csa_rclists = NULL; | |
467 | if (args->csa_nrclists) { | |
0439f31c DC |
468 | args->csa_rclists = kmalloc_array(args->csa_nrclists, |
469 | sizeof(*args->csa_rclists), | |
470 | GFP_KERNEL); | |
4aece6a1 BH |
471 | if (unlikely(args->csa_rclists == NULL)) |
472 | goto out; | |
473 | ||
474 | for (i = 0; i < args->csa_nrclists; i++) { | |
475 | status = decode_rc_list(xdr, &args->csa_rclists[i]); | |
d8ba1f97 TM |
476 | if (status) { |
477 | args->csa_nrclists = i; | |
4aece6a1 | 478 | goto out_free; |
d8ba1f97 | 479 | } |
4aece6a1 BH |
480 | } |
481 | } | |
482 | status = 0; | |
483 | ||
484 | dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u slotid %u " | |
485 | "highestslotid %u cachethis %d nrclists %u\n", | |
486 | __func__, | |
487 | ((u32 *)&args->csa_sessionid)[0], | |
488 | ((u32 *)&args->csa_sessionid)[1], | |
489 | ((u32 *)&args->csa_sessionid)[2], | |
490 | ((u32 *)&args->csa_sessionid)[3], | |
491 | args->csa_sequenceid, args->csa_slotid, | |
492 | args->csa_highestslotid, args->csa_cachethis, | |
493 | args->csa_nrclists); | |
494 | out: | |
495 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); | |
496 | return status; | |
497 | ||
498 | out_free: | |
499 | for (i = 0; i < args->csa_nrclists; i++) | |
500 | kfree(args->csa_rclists[i].rcl_refcalls); | |
501 | kfree(args->csa_rclists); | |
502 | goto out; | |
503 | } | |
504 | ||
9733f0d9 | 505 | static __be32 decode_recallany_args(struct svc_rqst *rqstp, |
31f09607 AB |
506 | struct xdr_stream *xdr, |
507 | struct cb_recallanyargs *args) | |
508 | { | |
d743c3c9 PT |
509 | uint32_t bitmap[2]; |
510 | __be32 *p, status; | |
31f09607 | 511 | |
31f09607 AB |
512 | p = read_buf(xdr, 4); |
513 | if (unlikely(p == NULL)) | |
514 | return htonl(NFS4ERR_BADXDR); | |
515 | args->craa_objs_to_keep = ntohl(*p++); | |
d743c3c9 PT |
516 | status = decode_bitmap(xdr, bitmap); |
517 | if (unlikely(status)) | |
518 | return status; | |
519 | args->craa_type_mask = bitmap[0]; | |
31f09607 AB |
520 | |
521 | return 0; | |
522 | } | |
523 | ||
9733f0d9 | 524 | static __be32 decode_recallslot_args(struct svc_rqst *rqstp, |
b9efa1b2 AA |
525 | struct xdr_stream *xdr, |
526 | struct cb_recallslotargs *args) | |
527 | { | |
528 | __be32 *p; | |
529 | ||
b9efa1b2 AA |
530 | p = read_buf(xdr, 4); |
531 | if (unlikely(p == NULL)) | |
532 | return htonl(NFS4ERR_BADXDR); | |
d5fb4ce3 | 533 | args->crsa_target_highest_slotid = ntohl(*p++); |
b9efa1b2 AA |
534 | return 0; |
535 | } | |
536 | ||
4aece6a1 BH |
537 | #endif /* CONFIG_NFS_V4_1 */ |
538 | ||
e6f684f6 | 539 | static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str) |
1da177e4 | 540 | { |
5704fdeb | 541 | __be32 *p; |
1da177e4 LT |
542 | |
543 | p = xdr_reserve_space(xdr, 4 + len); | |
544 | if (unlikely(p == NULL)) | |
545 | return htonl(NFS4ERR_RESOURCE); | |
546 | xdr_encode_opaque(p, str, len); | |
547 | return 0; | |
548 | } | |
549 | ||
550 | #define CB_SUPPORTED_ATTR0 (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) | |
551 | #define CB_SUPPORTED_ATTR1 (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) | |
5704fdeb | 552 | static __be32 encode_attr_bitmap(struct xdr_stream *xdr, const uint32_t *bitmap, __be32 **savep) |
1da177e4 | 553 | { |
5704fdeb AV |
554 | __be32 bm[2]; |
555 | __be32 *p; | |
1da177e4 LT |
556 | |
557 | bm[0] = htonl(bitmap[0] & CB_SUPPORTED_ATTR0); | |
558 | bm[1] = htonl(bitmap[1] & CB_SUPPORTED_ATTR1); | |
559 | if (bm[1] != 0) { | |
560 | p = xdr_reserve_space(xdr, 16); | |
561 | if (unlikely(p == NULL)) | |
562 | return htonl(NFS4ERR_RESOURCE); | |
563 | *p++ = htonl(2); | |
564 | *p++ = bm[0]; | |
565 | *p++ = bm[1]; | |
566 | } else if (bm[0] != 0) { | |
567 | p = xdr_reserve_space(xdr, 12); | |
568 | if (unlikely(p == NULL)) | |
569 | return htonl(NFS4ERR_RESOURCE); | |
570 | *p++ = htonl(1); | |
571 | *p++ = bm[0]; | |
572 | } else { | |
573 | p = xdr_reserve_space(xdr, 8); | |
574 | if (unlikely(p == NULL)) | |
575 | return htonl(NFS4ERR_RESOURCE); | |
576 | *p++ = htonl(0); | |
577 | } | |
578 | *savep = p; | |
579 | return 0; | |
580 | } | |
581 | ||
e6f684f6 | 582 | static __be32 encode_attr_change(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t change) |
1da177e4 | 583 | { |
5704fdeb | 584 | __be32 *p; |
1da177e4 LT |
585 | |
586 | if (!(bitmap[0] & FATTR4_WORD0_CHANGE)) | |
587 | return 0; | |
588 | p = xdr_reserve_space(xdr, 8); | |
90dc7d27 | 589 | if (unlikely(!p)) |
1da177e4 LT |
590 | return htonl(NFS4ERR_RESOURCE); |
591 | p = xdr_encode_hyper(p, change); | |
592 | return 0; | |
593 | } | |
594 | ||
e6f684f6 | 595 | static __be32 encode_attr_size(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t size) |
1da177e4 | 596 | { |
5704fdeb | 597 | __be32 *p; |
1da177e4 LT |
598 | |
599 | if (!(bitmap[0] & FATTR4_WORD0_SIZE)) | |
600 | return 0; | |
601 | p = xdr_reserve_space(xdr, 8); | |
90dc7d27 | 602 | if (unlikely(!p)) |
1da177e4 LT |
603 | return htonl(NFS4ERR_RESOURCE); |
604 | p = xdr_encode_hyper(p, size); | |
605 | return 0; | |
606 | } | |
607 | ||
e6f684f6 | 608 | static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec *time) |
1da177e4 | 609 | { |
5704fdeb | 610 | __be32 *p; |
1da177e4 LT |
611 | |
612 | p = xdr_reserve_space(xdr, 12); | |
90dc7d27 | 613 | if (unlikely(!p)) |
1da177e4 LT |
614 | return htonl(NFS4ERR_RESOURCE); |
615 | p = xdr_encode_hyper(p, time->tv_sec); | |
616 | *p = htonl(time->tv_nsec); | |
617 | return 0; | |
618 | } | |
619 | ||
e6f684f6 | 620 | static __be32 encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) |
1da177e4 LT |
621 | { |
622 | if (!(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) | |
623 | return 0; | |
624 | return encode_attr_time(xdr,time); | |
625 | } | |
626 | ||
e6f684f6 | 627 | static __be32 encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) |
1da177e4 LT |
628 | { |
629 | if (!(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) | |
630 | return 0; | |
631 | return encode_attr_time(xdr,time); | |
632 | } | |
633 | ||
e6f684f6 | 634 | static __be32 encode_compound_hdr_res(struct xdr_stream *xdr, struct cb_compound_hdr_res *hdr) |
1da177e4 | 635 | { |
e6f684f6 | 636 | __be32 status; |
1da177e4 LT |
637 | |
638 | hdr->status = xdr_reserve_space(xdr, 4); | |
639 | if (unlikely(hdr->status == NULL)) | |
640 | return htonl(NFS4ERR_RESOURCE); | |
641 | status = encode_string(xdr, hdr->taglen, hdr->tag); | |
642 | if (unlikely(status != 0)) | |
643 | return status; | |
644 | hdr->nops = xdr_reserve_space(xdr, 4); | |
645 | if (unlikely(hdr->nops == NULL)) | |
646 | return htonl(NFS4ERR_RESOURCE); | |
647 | return 0; | |
648 | } | |
649 | ||
e6f684f6 | 650 | static __be32 encode_op_hdr(struct xdr_stream *xdr, uint32_t op, __be32 res) |
1da177e4 | 651 | { |
5704fdeb | 652 | __be32 *p; |
1da177e4 LT |
653 | |
654 | p = xdr_reserve_space(xdr, 8); | |
655 | if (unlikely(p == NULL)) | |
31d2b435 | 656 | return htonl(NFS4ERR_RESOURCE_HDR); |
1da177e4 LT |
657 | *p++ = htonl(op); |
658 | *p = res; | |
659 | return 0; | |
660 | } | |
661 | ||
e6f684f6 | 662 | static __be32 encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr, const struct cb_getattrres *res) |
1da177e4 | 663 | { |
5704fdeb | 664 | __be32 *savep = NULL; |
e6f684f6 | 665 | __be32 status = res->status; |
1da177e4 LT |
666 | |
667 | if (unlikely(status != 0)) | |
668 | goto out; | |
669 | status = encode_attr_bitmap(xdr, res->bitmap, &savep); | |
670 | if (unlikely(status != 0)) | |
671 | goto out; | |
672 | status = encode_attr_change(xdr, res->bitmap, res->change_attr); | |
673 | if (unlikely(status != 0)) | |
674 | goto out; | |
675 | status = encode_attr_size(xdr, res->bitmap, res->size); | |
676 | if (unlikely(status != 0)) | |
677 | goto out; | |
678 | status = encode_attr_ctime(xdr, res->bitmap, &res->ctime); | |
679 | if (unlikely(status != 0)) | |
680 | goto out; | |
681 | status = encode_attr_mtime(xdr, res->bitmap, &res->mtime); | |
682 | *savep = htonl((unsigned int)((char *)xdr->p - (char *)(savep+1))); | |
683 | out: | |
3110ff80 | 684 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); |
1da177e4 LT |
685 | return status; |
686 | } | |
687 | ||
34bc47c9 BH |
688 | #if defined(CONFIG_NFS_V4_1) |
689 | ||
9733f0d9 | 690 | static __be32 encode_sessionid(struct xdr_stream *xdr, |
4aece6a1 BH |
691 | const struct nfs4_sessionid *sid) |
692 | { | |
9733f0d9 | 693 | __be32 *p; |
4aece6a1 | 694 | |
590184a6 | 695 | p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN); |
4aece6a1 BH |
696 | if (unlikely(p == NULL)) |
697 | return htonl(NFS4ERR_RESOURCE); | |
698 | ||
590184a6 | 699 | memcpy(p, sid, NFS4_MAX_SESSIONID_LEN); |
4aece6a1 BH |
700 | return 0; |
701 | } | |
702 | ||
9733f0d9 | 703 | static __be32 encode_cb_sequence_res(struct svc_rqst *rqstp, |
4aece6a1 BH |
704 | struct xdr_stream *xdr, |
705 | const struct cb_sequenceres *res) | |
706 | { | |
9733f0d9 | 707 | __be32 *p; |
e216c8c7 | 708 | __be32 status = res->csr_status; |
4aece6a1 BH |
709 | |
710 | if (unlikely(status != 0)) | |
711 | goto out; | |
712 | ||
e0a63c0b KM |
713 | status = encode_sessionid(xdr, &res->csr_sessionid); |
714 | if (status) | |
715 | goto out; | |
4aece6a1 BH |
716 | |
717 | p = xdr_reserve_space(xdr, 4 * sizeof(uint32_t)); | |
718 | if (unlikely(p == NULL)) | |
719 | return htonl(NFS4ERR_RESOURCE); | |
720 | ||
721 | *p++ = htonl(res->csr_sequenceid); | |
722 | *p++ = htonl(res->csr_slotid); | |
723 | *p++ = htonl(res->csr_highestslotid); | |
724 | *p++ = htonl(res->csr_target_highestslotid); | |
725 | out: | |
726 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); | |
727 | return status; | |
728 | } | |
729 | ||
34bc47c9 BH |
730 | static __be32 |
731 | preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) | |
732 | { | |
281fe15d BH |
733 | if (op_nr == OP_CB_SEQUENCE) { |
734 | if (nop != 0) | |
735 | return htonl(NFS4ERR_SEQUENCE_POS); | |
736 | } else { | |
737 | if (nop == 0) | |
738 | return htonl(NFS4ERR_OP_NOT_IN_SESSION); | |
739 | } | |
740 | ||
34bc47c9 BH |
741 | switch (op_nr) { |
742 | case OP_CB_GETATTR: | |
743 | case OP_CB_RECALL: | |
4aece6a1 | 744 | case OP_CB_SEQUENCE: |
31f09607 | 745 | case OP_CB_RECALL_ANY: |
b9efa1b2 | 746 | case OP_CB_RECALL_SLOT: |
f2a62561 | 747 | case OP_CB_LAYOUTRECALL: |
1be5683b | 748 | case OP_CB_NOTIFY_DEVICEID: |
34bc47c9 BH |
749 | *op = &callback_ops[op_nr]; |
750 | break; | |
751 | ||
34bc47c9 BH |
752 | case OP_CB_NOTIFY: |
753 | case OP_CB_PUSH_DELEG: | |
34bc47c9 | 754 | case OP_CB_RECALLABLE_OBJ_AVAIL: |
34bc47c9 BH |
755 | case OP_CB_WANTS_CANCELLED: |
756 | case OP_CB_NOTIFY_LOCK: | |
757 | return htonl(NFS4ERR_NOTSUPP); | |
758 | ||
759 | default: | |
760 | return htonl(NFS4ERR_OP_ILLEGAL); | |
761 | } | |
762 | ||
763 | return htonl(NFS_OK); | |
764 | } | |
765 | ||
810d82e6 TM |
766 | static void nfs4_callback_free_slot(struct nfs4_session *session, |
767 | struct nfs4_slot *slot) | |
42acd021 AA |
768 | { |
769 | struct nfs4_slot_table *tbl = &session->bc_slot_table; | |
770 | ||
771 | spin_lock(&tbl->slot_tbl_lock); | |
772 | /* | |
773 | * Let the state manager know callback processing done. | |
774 | * A single slot, so highest used slotid is either 0 or -1 | |
775 | */ | |
810d82e6 | 776 | nfs4_free_slot(tbl, slot); |
774d5f14 | 777 | nfs4_slot_tbl_drain_complete(tbl); |
42acd021 AA |
778 | spin_unlock(&tbl->slot_tbl_lock); |
779 | } | |
780 | ||
55a67399 | 781 | static void nfs4_cb_free_slot(struct cb_process_state *cps) |
42acd021 | 782 | { |
810d82e6 TM |
783 | if (cps->slot) { |
784 | nfs4_callback_free_slot(cps->clp->cl_session, cps->slot); | |
785 | cps->slot = NULL; | |
786 | } | |
42acd021 AA |
787 | } |
788 | ||
34bc47c9 BH |
789 | #else /* CONFIG_NFS_V4_1 */ |
790 | ||
791 | static __be32 | |
792 | preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) | |
793 | { | |
794 | return htonl(NFS4ERR_MINOR_VERS_MISMATCH); | |
795 | } | |
796 | ||
55a67399 | 797 | static void nfs4_cb_free_slot(struct cb_process_state *cps) |
42acd021 AA |
798 | { |
799 | } | |
34bc47c9 BH |
800 | #endif /* CONFIG_NFS_V4_1 */ |
801 | ||
6b140b85 BS |
802 | #ifdef CONFIG_NFS_V4_2 |
803 | static __be32 | |
804 | preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op) | |
805 | { | |
806 | __be32 status = preprocess_nfs41_op(nop, op_nr, op); | |
807 | if (status != htonl(NFS4ERR_OP_ILLEGAL)) | |
808 | return status; | |
809 | ||
810 | if (op_nr == OP_CB_OFFLOAD) | |
811 | return htonl(NFS4ERR_NOTSUPP); | |
812 | return htonl(NFS4ERR_OP_ILLEGAL); | |
813 | } | |
814 | #else /* CONFIG_NFS_V4_2 */ | |
815 | static __be32 | |
816 | preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op) | |
817 | { | |
818 | return htonl(NFS4ERR_MINOR_VERS_MISMATCH); | |
819 | } | |
820 | #endif /* CONFIG_NFS_V4_2 */ | |
821 | ||
34bc47c9 BH |
822 | static __be32 |
823 | preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op) | |
824 | { | |
825 | switch (op_nr) { | |
826 | case OP_CB_GETATTR: | |
827 | case OP_CB_RECALL: | |
828 | *op = &callback_ops[op_nr]; | |
829 | break; | |
830 | default: | |
831 | return htonl(NFS4ERR_OP_ILLEGAL); | |
832 | } | |
833 | ||
834 | return htonl(NFS_OK); | |
835 | } | |
836 | ||
459de2ed | 837 | static __be32 process_op(int nop, struct svc_rqst *rqstp, |
1da177e4 | 838 | struct xdr_stream *xdr_in, void *argp, |
c36fca52 AA |
839 | struct xdr_stream *xdr_out, void *resp, |
840 | struct cb_process_state *cps) | |
1da177e4 | 841 | { |
a162a6b8 | 842 | struct callback_op *op = &callback_ops[0]; |
31d2b435 | 843 | unsigned int op_nr; |
34bc47c9 | 844 | __be32 status; |
1da177e4 | 845 | long maxlen; |
e6f684f6 | 846 | __be32 res; |
1da177e4 | 847 | |
3110ff80 | 848 | dprintk("%s: start\n", __func__); |
1da177e4 | 849 | status = decode_op_hdr(xdr_in, &op_nr); |
31d2b435 AA |
850 | if (unlikely(status)) |
851 | return status; | |
1da177e4 | 852 | |
34bc47c9 | 853 | dprintk("%s: minorversion=%d nop=%d op_nr=%u\n", |
459de2ed | 854 | __func__, cps->minorversion, nop, op_nr); |
34bc47c9 | 855 | |
6b140b85 BS |
856 | switch (cps->minorversion) { |
857 | case 0: | |
858 | status = preprocess_nfs4_op(op_nr, &op); | |
859 | break; | |
860 | case 1: | |
861 | status = preprocess_nfs41_op(nop, op_nr, &op); | |
862 | break; | |
863 | case 2: | |
864 | status = preprocess_nfs42_op(nop, op_nr, &op); | |
865 | break; | |
866 | default: | |
867 | status = htonl(NFS4ERR_MINOR_VERS_MISMATCH); | |
868 | } | |
34bc47c9 | 869 | |
34bc47c9 BH |
870 | if (status == htonl(NFS4ERR_OP_ILLEGAL)) |
871 | op_nr = OP_CB_ILLEGAL; | |
b92b3019 AA |
872 | if (status) |
873 | goto encode_hdr; | |
31d2b435 | 874 | |
c36fca52 AA |
875 | if (cps->drc_status) { |
876 | status = cps->drc_status; | |
4911096f AA |
877 | goto encode_hdr; |
878 | } | |
879 | ||
1da177e4 LT |
880 | maxlen = xdr_out->end - xdr_out->p; |
881 | if (maxlen > 0 && maxlen < PAGE_SIZE) { | |
e95e60da AA |
882 | status = op->decode_args(rqstp, xdr_in, argp); |
883 | if (likely(status == 0)) | |
c36fca52 | 884 | status = op->process_op(argp, resp, cps); |
1da177e4 LT |
885 | } else |
886 | status = htonl(NFS4ERR_RESOURCE); | |
887 | ||
b92b3019 | 888 | encode_hdr: |
1da177e4 | 889 | res = encode_op_hdr(xdr_out, op_nr, status); |
31d2b435 AA |
890 | if (unlikely(res)) |
891 | return res; | |
1da177e4 LT |
892 | if (op->encode_res != NULL && status == 0) |
893 | status = op->encode_res(rqstp, xdr_out, resp); | |
3110ff80 | 894 | dprintk("%s: done, status = %d\n", __func__, ntohl(status)); |
1da177e4 LT |
895 | return status; |
896 | } | |
897 | ||
898 | /* | |
899 | * Decode, process and encode a COMPOUND | |
900 | */ | |
7111c66e | 901 | static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *resp) |
1da177e4 | 902 | { |
3a6258e1 TM |
903 | struct cb_compound_hdr_arg hdr_arg = { 0 }; |
904 | struct cb_compound_hdr_res hdr_res = { NULL }; | |
1da177e4 | 905 | struct xdr_stream xdr_in, xdr_out; |
c36fca52 AA |
906 | __be32 *p, status; |
907 | struct cb_process_state cps = { | |
908 | .drc_status = 0, | |
909 | .clp = NULL, | |
9695c705 | 910 | .net = SVC_NET(rqstp), |
c36fca52 | 911 | }; |
3a6258e1 | 912 | unsigned int nops = 0; |
1da177e4 | 913 | |
3110ff80 | 914 | dprintk("%s: start\n", __func__); |
1da177e4 | 915 | |
756b9b37 | 916 | xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base); |
1da177e4 | 917 | |
5704fdeb | 918 | p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len); |
1da177e4 LT |
919 | xdr_init_encode(&xdr_out, &rqstp->rq_res, p); |
920 | ||
3a6258e1 | 921 | status = decode_compound_hdr_arg(&xdr_in, &hdr_arg); |
4ed0d83d | 922 | if (status == htonl(NFS4ERR_RESOURCE)) |
3a6258e1 TM |
923 | return rpc_garbage_args; |
924 | ||
c36fca52 | 925 | if (hdr_arg.minorversion == 0) { |
9695c705 | 926 | cps.clp = nfs4_find_client_ident(SVC_NET(rqstp), hdr_arg.cb_ident); |
778be232 | 927 | if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp)) |
c36fca52 | 928 | return rpc_drop_reply; |
778be232 | 929 | } |
c36fca52 | 930 | |
459de2ed | 931 | cps.minorversion = hdr_arg.minorversion; |
1da177e4 LT |
932 | hdr_res.taglen = hdr_arg.taglen; |
933 | hdr_res.tag = hdr_arg.tag; | |
3a6258e1 TM |
934 | if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0) |
935 | return rpc_system_err; | |
1da177e4 | 936 | |
3a6258e1 | 937 | while (status == 0 && nops != hdr_arg.nops) { |
459de2ed BS |
938 | status = process_op(nops, rqstp, &xdr_in, |
939 | argp, &xdr_out, resp, &cps); | |
1da177e4 LT |
940 | nops++; |
941 | } | |
3a6258e1 | 942 | |
31d2b435 AA |
943 | /* Buffer overflow in decode_ops_hdr or encode_ops_hdr. Return |
944 | * resource error in cb_compound status without returning op */ | |
945 | if (unlikely(status == htonl(NFS4ERR_RESOURCE_HDR))) { | |
946 | status = htonl(NFS4ERR_RESOURCE); | |
947 | nops--; | |
948 | } | |
949 | ||
1da177e4 LT |
950 | *hdr_res.status = status; |
951 | *hdr_res.nops = htonl(nops); | |
55a67399 | 952 | nfs4_cb_free_slot(&cps); |
c36fca52 | 953 | nfs_put_client(cps.clp); |
3110ff80 | 954 | dprintk("%s: done, status = %u\n", __func__, ntohl(status)); |
1da177e4 LT |
955 | return rpc_success; |
956 | } | |
957 | ||
958 | /* | |
959 | * Define NFS4 callback COMPOUND ops. | |
960 | */ | |
961 | static struct callback_op callback_ops[] = { | |
962 | [0] = { | |
963 | .res_maxsize = CB_OP_HDR_RES_MAXSZ, | |
964 | }, | |
965 | [OP_CB_GETATTR] = { | |
966 | .process_op = (callback_process_op_t)nfs4_callback_getattr, | |
967 | .decode_args = (callback_decode_arg_t)decode_getattr_args, | |
968 | .encode_res = (callback_encode_res_t)encode_getattr_res, | |
969 | .res_maxsize = CB_OP_GETATTR_RES_MAXSZ, | |
970 | }, | |
971 | [OP_CB_RECALL] = { | |
972 | .process_op = (callback_process_op_t)nfs4_callback_recall, | |
973 | .decode_args = (callback_decode_arg_t)decode_recall_args, | |
974 | .res_maxsize = CB_OP_RECALL_RES_MAXSZ, | |
4aece6a1 BH |
975 | }, |
976 | #if defined(CONFIG_NFS_V4_1) | |
f2a62561 FI |
977 | [OP_CB_LAYOUTRECALL] = { |
978 | .process_op = (callback_process_op_t)nfs4_callback_layoutrecall, | |
979 | .decode_args = | |
980 | (callback_decode_arg_t)decode_layoutrecall_args, | |
981 | .res_maxsize = CB_OP_LAYOUTRECALL_RES_MAXSZ, | |
982 | }, | |
1be5683b ME |
983 | [OP_CB_NOTIFY_DEVICEID] = { |
984 | .process_op = (callback_process_op_t)nfs4_callback_devicenotify, | |
985 | .decode_args = | |
986 | (callback_decode_arg_t)decode_devicenotify_args, | |
987 | .res_maxsize = CB_OP_DEVICENOTIFY_RES_MAXSZ, | |
988 | }, | |
4aece6a1 BH |
989 | [OP_CB_SEQUENCE] = { |
990 | .process_op = (callback_process_op_t)nfs4_callback_sequence, | |
991 | .decode_args = (callback_decode_arg_t)decode_cb_sequence_args, | |
992 | .encode_res = (callback_encode_res_t)encode_cb_sequence_res, | |
993 | .res_maxsize = CB_OP_SEQUENCE_RES_MAXSZ, | |
994 | }, | |
31f09607 AB |
995 | [OP_CB_RECALL_ANY] = { |
996 | .process_op = (callback_process_op_t)nfs4_callback_recallany, | |
997 | .decode_args = (callback_decode_arg_t)decode_recallany_args, | |
998 | .res_maxsize = CB_OP_RECALLANY_RES_MAXSZ, | |
999 | }, | |
b9efa1b2 AA |
1000 | [OP_CB_RECALL_SLOT] = { |
1001 | .process_op = (callback_process_op_t)nfs4_callback_recallslot, | |
1002 | .decode_args = (callback_decode_arg_t)decode_recallslot_args, | |
1003 | .res_maxsize = CB_OP_RECALLSLOT_RES_MAXSZ, | |
1004 | }, | |
4aece6a1 | 1005 | #endif /* CONFIG_NFS_V4_1 */ |
1da177e4 LT |
1006 | }; |
1007 | ||
1008 | /* | |
1009 | * Define NFS4 callback procedures | |
1010 | */ | |
1011 | static struct svc_procedure nfs4_callback_procedures1[] = { | |
1012 | [CB_NULL] = { | |
1013 | .pc_func = nfs4_callback_null, | |
1014 | .pc_decode = (kxdrproc_t)nfs4_decode_void, | |
1015 | .pc_encode = (kxdrproc_t)nfs4_encode_void, | |
1016 | .pc_xdrressize = 1, | |
1017 | }, | |
1018 | [CB_COMPOUND] = { | |
1019 | .pc_func = nfs4_callback_compound, | |
1020 | .pc_encode = (kxdrproc_t)nfs4_encode_void, | |
1021 | .pc_argsize = 256, | |
1022 | .pc_ressize = 256, | |
1023 | .pc_xdrressize = NFS4_CALLBACK_BUFSIZE, | |
1024 | } | |
1025 | }; | |
1026 | ||
1027 | struct svc_version nfs4_callback_version1 = { | |
1028 | .vs_vers = 1, | |
1029 | .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), | |
1030 | .vs_proc = nfs4_callback_procedures1, | |
1031 | .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, | |
1032 | .vs_dispatch = NULL, | |
49697ee7 | 1033 | .vs_hidden = 1, |
1da177e4 LT |
1034 | }; |
1035 | ||
07bccc2d AB |
1036 | struct svc_version nfs4_callback_version4 = { |
1037 | .vs_vers = 4, | |
1038 | .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), | |
1039 | .vs_proc = nfs4_callback_procedures1, | |
1040 | .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, | |
1041 | .vs_dispatch = NULL, | |
6070295e | 1042 | .vs_hidden = 1, |
07bccc2d | 1043 | }; |