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> | |
5a0e3ad6 | 12 | #include <linux/slab.h> |
c36fca52 | 13 | #include <linux/sunrpc/bc_xprt.h> |
4ce79717 | 14 | #include "nfs4_fs.h" |
1da177e4 | 15 | #include "callback.h" |
c36fca52 | 16 | #include "internal.h" |
1da177e4 LT |
17 | |
18 | #define CB_OP_TAGLEN_MAXSZ (512) | |
19 | #define CB_OP_HDR_RES_MAXSZ (2 + CB_OP_TAGLEN_MAXSZ) | |
20 | #define CB_OP_GETATTR_BITMAP_MAXSZ (4) | |
21 | #define CB_OP_GETATTR_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \ | |
22 | CB_OP_GETATTR_BITMAP_MAXSZ + \ | |
23 | 2 + 2 + 3 + 3) | |
24 | #define CB_OP_RECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) | |
25 | ||
4aece6a1 | 26 | #if defined(CONFIG_NFS_V4_1) |
f2a62561 | 27 | #define CB_OP_LAYOUTRECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
4aece6a1 BH |
28 | #define CB_OP_SEQUENCE_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \ |
29 | 4 + 1 + 3) | |
31f09607 | 30 | #define CB_OP_RECALLANY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
b9efa1b2 | 31 | #define CB_OP_RECALLSLOT_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
4aece6a1 BH |
32 | #endif /* CONFIG_NFS_V4_1 */ |
33 | ||
1da177e4 LT |
34 | #define NFSDBG_FACILITY NFSDBG_CALLBACK |
35 | ||
31d2b435 AA |
36 | /* Internal error code */ |
37 | #define NFS4ERR_RESOURCE_HDR 11050 | |
38 | ||
c36fca52 AA |
39 | typedef __be32 (*callback_process_op_t)(void *, void *, |
40 | struct cb_process_state *); | |
e6f684f6 AV |
41 | typedef __be32 (*callback_decode_arg_t)(struct svc_rqst *, struct xdr_stream *, void *); |
42 | typedef __be32 (*callback_encode_res_t)(struct svc_rqst *, struct xdr_stream *, void *); | |
1da177e4 LT |
43 | |
44 | ||
45 | struct callback_op { | |
46 | callback_process_op_t process_op; | |
47 | callback_decode_arg_t decode_args; | |
48 | callback_encode_res_t encode_res; | |
49 | long res_maxsize; | |
50 | }; | |
51 | ||
52 | static struct callback_op callback_ops[]; | |
53 | ||
7111c66e | 54 | static __be32 nfs4_callback_null(struct svc_rqst *rqstp, void *argp, void *resp) |
1da177e4 LT |
55 | { |
56 | return htonl(NFS4_OK); | |
57 | } | |
58 | ||
5704fdeb | 59 | static int nfs4_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
1da177e4 LT |
60 | { |
61 | return xdr_argsize_check(rqstp, p); | |
62 | } | |
63 | ||
5704fdeb | 64 | static int nfs4_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
1da177e4 LT |
65 | { |
66 | return xdr_ressize_check(rqstp, p); | |
67 | } | |
68 | ||
5704fdeb | 69 | static __be32 *read_buf(struct xdr_stream *xdr, int nbytes) |
1da177e4 | 70 | { |
5704fdeb | 71 | __be32 *p; |
1da177e4 LT |
72 | |
73 | p = xdr_inline_decode(xdr, nbytes); | |
74 | if (unlikely(p == NULL)) | |
75 | printk(KERN_WARNING "NFSv4 callback reply buffer overflowed!\n"); | |
76 | return p; | |
77 | } | |
78 | ||
e6f684f6 | 79 | static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len, const char **str) |
1da177e4 | 80 | { |
5704fdeb | 81 | __be32 *p; |
1da177e4 LT |
82 | |
83 | p = read_buf(xdr, 4); | |
84 | if (unlikely(p == NULL)) | |
85 | return htonl(NFS4ERR_RESOURCE); | |
86 | *len = ntohl(*p); | |
87 | ||
88 | if (*len != 0) { | |
89 | p = read_buf(xdr, *len); | |
90 | if (unlikely(p == NULL)) | |
91 | return htonl(NFS4ERR_RESOURCE); | |
92 | *str = (const char *)p; | |
93 | } else | |
94 | *str = NULL; | |
95 | ||
96 | return 0; | |
97 | } | |
98 | ||
e6f684f6 | 99 | static __be32 decode_fh(struct xdr_stream *xdr, struct nfs_fh *fh) |
1da177e4 | 100 | { |
5704fdeb | 101 | __be32 *p; |
1da177e4 LT |
102 | |
103 | p = read_buf(xdr, 4); | |
104 | if (unlikely(p == NULL)) | |
105 | return htonl(NFS4ERR_RESOURCE); | |
106 | fh->size = ntohl(*p); | |
107 | if (fh->size > NFS4_FHSIZE) | |
108 | return htonl(NFS4ERR_BADHANDLE); | |
109 | p = read_buf(xdr, fh->size); | |
110 | if (unlikely(p == NULL)) | |
111 | return htonl(NFS4ERR_RESOURCE); | |
112 | memcpy(&fh->data[0], p, fh->size); | |
113 | memset(&fh->data[fh->size], 0, sizeof(fh->data) - fh->size); | |
114 | return 0; | |
115 | } | |
116 | ||
e6f684f6 | 117 | static __be32 decode_bitmap(struct xdr_stream *xdr, uint32_t *bitmap) |
1da177e4 | 118 | { |
5704fdeb | 119 | __be32 *p; |
1da177e4 LT |
120 | unsigned int attrlen; |
121 | ||
122 | p = read_buf(xdr, 4); | |
123 | if (unlikely(p == NULL)) | |
124 | return htonl(NFS4ERR_RESOURCE); | |
125 | attrlen = ntohl(*p); | |
126 | p = read_buf(xdr, attrlen << 2); | |
127 | if (unlikely(p == NULL)) | |
128 | return htonl(NFS4ERR_RESOURCE); | |
129 | if (likely(attrlen > 0)) | |
130 | bitmap[0] = ntohl(*p++); | |
131 | if (attrlen > 1) | |
132 | bitmap[1] = ntohl(*p); | |
133 | return 0; | |
134 | } | |
135 | ||
e6f684f6 | 136 | static __be32 decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) |
1da177e4 | 137 | { |
5704fdeb | 138 | __be32 *p; |
1da177e4 LT |
139 | |
140 | p = read_buf(xdr, 16); | |
141 | if (unlikely(p == NULL)) | |
142 | return htonl(NFS4ERR_RESOURCE); | |
143 | memcpy(stateid->data, p, 16); | |
144 | return 0; | |
145 | } | |
146 | ||
e6f684f6 | 147 | static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound_hdr_arg *hdr) |
1da177e4 | 148 | { |
5704fdeb | 149 | __be32 *p; |
e6f684f6 | 150 | __be32 status; |
1da177e4 LT |
151 | |
152 | status = decode_string(xdr, &hdr->taglen, &hdr->tag); | |
153 | if (unlikely(status != 0)) | |
154 | return status; | |
155 | /* We do not like overly long tags! */ | |
5cce428d | 156 | if (hdr->taglen > CB_OP_TAGLEN_MAXSZ - 12) { |
1da177e4 | 157 | printk("NFSv4 CALLBACK %s: client sent tag of length %u\n", |
3110ff80 | 158 | __func__, hdr->taglen); |
1da177e4 LT |
159 | return htonl(NFS4ERR_RESOURCE); |
160 | } | |
161 | p = read_buf(xdr, 12); | |
162 | if (unlikely(p == NULL)) | |
163 | return htonl(NFS4ERR_RESOURCE); | |
b8f2ef84 | 164 | hdr->minorversion = ntohl(*p++); |
48a9e2d2 BH |
165 | /* Check minor version is zero or one. */ |
166 | if (hdr->minorversion <= 1) { | |
c36fca52 | 167 | hdr->cb_ident = ntohl(*p++); /* ignored by v4.1 */ |
48a9e2d2 | 168 | } else { |
b8f2ef84 BH |
169 | printk(KERN_WARNING "%s: NFSv4 server callback with " |
170 | "illegal minor version %u!\n", | |
171 | __func__, hdr->minorversion); | |
1da177e4 LT |
172 | return htonl(NFS4ERR_MINOR_VERS_MISMATCH); |
173 | } | |
1da177e4 | 174 | hdr->nops = ntohl(*p); |
b8f2ef84 BH |
175 | dprintk("%s: minorversion %d nops %d\n", __func__, |
176 | hdr->minorversion, hdr->nops); | |
1da177e4 LT |
177 | return 0; |
178 | } | |
179 | ||
e6f684f6 | 180 | static __be32 decode_op_hdr(struct xdr_stream *xdr, unsigned int *op) |
1da177e4 | 181 | { |
5704fdeb | 182 | __be32 *p; |
1da177e4 LT |
183 | p = read_buf(xdr, 4); |
184 | if (unlikely(p == NULL)) | |
31d2b435 | 185 | return htonl(NFS4ERR_RESOURCE_HDR); |
1da177e4 LT |
186 | *op = ntohl(*p); |
187 | return 0; | |
188 | } | |
189 | ||
e6f684f6 | 190 | static __be32 decode_getattr_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_getattrargs *args) |
1da177e4 | 191 | { |
e6f684f6 | 192 | __be32 status; |
1da177e4 LT |
193 | |
194 | status = decode_fh(xdr, &args->fh); | |
195 | if (unlikely(status != 0)) | |
196 | goto out; | |
671beed7 | 197 | args->addr = svc_addr(rqstp); |
1da177e4 LT |
198 | status = decode_bitmap(xdr, args->bitmap); |
199 | out: | |
3110ff80 | 200 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); |
1da177e4 LT |
201 | return status; |
202 | } | |
203 | ||
e6f684f6 | 204 | static __be32 decode_recall_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_recallargs *args) |
1da177e4 | 205 | { |
5704fdeb | 206 | __be32 *p; |
e6f684f6 | 207 | __be32 status; |
1da177e4 | 208 | |
c1d35866 | 209 | args->addr = svc_addr(rqstp); |
1da177e4 LT |
210 | status = decode_stateid(xdr, &args->stateid); |
211 | if (unlikely(status != 0)) | |
212 | goto out; | |
213 | p = read_buf(xdr, 4); | |
214 | if (unlikely(p == NULL)) { | |
215 | status = htonl(NFS4ERR_RESOURCE); | |
216 | goto out; | |
217 | } | |
218 | args->truncate = ntohl(*p); | |
219 | status = decode_fh(xdr, &args->fh); | |
220 | out: | |
3110ff80 | 221 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); |
3873bc50 | 222 | return status; |
1da177e4 LT |
223 | } |
224 | ||
4aece6a1 BH |
225 | #if defined(CONFIG_NFS_V4_1) |
226 | ||
f2a62561 FI |
227 | static __be32 decode_layoutrecall_args(struct svc_rqst *rqstp, |
228 | struct xdr_stream *xdr, | |
229 | struct cb_layoutrecallargs *args) | |
230 | { | |
231 | __be32 *p; | |
232 | __be32 status = 0; | |
233 | uint32_t iomode; | |
234 | ||
235 | args->cbl_addr = svc_addr(rqstp); | |
236 | p = read_buf(xdr, 4 * sizeof(uint32_t)); | |
237 | if (unlikely(p == NULL)) { | |
238 | status = htonl(NFS4ERR_BADXDR); | |
239 | goto out; | |
240 | } | |
241 | ||
242 | args->cbl_layout_type = ntohl(*p++); | |
243 | /* Depite the spec's xdr, iomode really belongs in the FILE switch, | |
244 | * as it is unuseable and ignored with the other types. | |
245 | */ | |
246 | iomode = ntohl(*p++); | |
247 | args->cbl_layoutchanged = ntohl(*p++); | |
248 | args->cbl_recall_type = ntohl(*p++); | |
249 | ||
250 | if (args->cbl_recall_type == RETURN_FILE) { | |
251 | args->cbl_range.iomode = iomode; | |
252 | status = decode_fh(xdr, &args->cbl_fh); | |
253 | if (unlikely(status != 0)) | |
254 | goto out; | |
255 | ||
256 | p = read_buf(xdr, 2 * sizeof(uint64_t)); | |
257 | if (unlikely(p == NULL)) { | |
258 | status = htonl(NFS4ERR_BADXDR); | |
259 | goto out; | |
260 | } | |
261 | p = xdr_decode_hyper(p, &args->cbl_range.offset); | |
262 | p = xdr_decode_hyper(p, &args->cbl_range.length); | |
263 | status = decode_stateid(xdr, &args->cbl_stateid); | |
264 | if (unlikely(status != 0)) | |
265 | goto out; | |
266 | } else if (args->cbl_recall_type == RETURN_FSID) { | |
267 | p = read_buf(xdr, 2 * sizeof(uint64_t)); | |
268 | if (unlikely(p == NULL)) { | |
269 | status = htonl(NFS4ERR_BADXDR); | |
270 | goto out; | |
271 | } | |
272 | p = xdr_decode_hyper(p, &args->cbl_fsid.major); | |
273 | p = xdr_decode_hyper(p, &args->cbl_fsid.minor); | |
274 | } else if (args->cbl_recall_type != RETURN_ALL) { | |
275 | status = htonl(NFS4ERR_BADXDR); | |
276 | goto out; | |
277 | } | |
278 | dprintk("%s: ltype 0x%x iomode %d changed %d recall_type %d\n", | |
279 | __func__, | |
280 | args->cbl_layout_type, iomode, | |
281 | args->cbl_layoutchanged, args->cbl_recall_type); | |
282 | out: | |
283 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); | |
284 | return status; | |
285 | } | |
286 | ||
9733f0d9 | 287 | static __be32 decode_sessionid(struct xdr_stream *xdr, |
4aece6a1 BH |
288 | struct nfs4_sessionid *sid) |
289 | { | |
9733f0d9 | 290 | __be32 *p; |
4aece6a1 BH |
291 | int len = NFS4_MAX_SESSIONID_LEN; |
292 | ||
293 | p = read_buf(xdr, len); | |
294 | if (unlikely(p == NULL)) | |
a419aef8 | 295 | return htonl(NFS4ERR_RESOURCE); |
4aece6a1 BH |
296 | |
297 | memcpy(sid->data, p, len); | |
298 | return 0; | |
299 | } | |
300 | ||
9733f0d9 | 301 | static __be32 decode_rc_list(struct xdr_stream *xdr, |
4aece6a1 BH |
302 | struct referring_call_list *rc_list) |
303 | { | |
9733f0d9 | 304 | __be32 *p; |
4aece6a1 | 305 | int i; |
9733f0d9 | 306 | __be32 status; |
4aece6a1 BH |
307 | |
308 | status = decode_sessionid(xdr, &rc_list->rcl_sessionid); | |
309 | if (status) | |
310 | goto out; | |
311 | ||
312 | status = htonl(NFS4ERR_RESOURCE); | |
313 | p = read_buf(xdr, sizeof(uint32_t)); | |
314 | if (unlikely(p == NULL)) | |
315 | goto out; | |
316 | ||
317 | rc_list->rcl_nrefcalls = ntohl(*p++); | |
318 | if (rc_list->rcl_nrefcalls) { | |
319 | p = read_buf(xdr, | |
320 | rc_list->rcl_nrefcalls * 2 * sizeof(uint32_t)); | |
321 | if (unlikely(p == NULL)) | |
322 | goto out; | |
323 | rc_list->rcl_refcalls = kmalloc(rc_list->rcl_nrefcalls * | |
324 | sizeof(*rc_list->rcl_refcalls), | |
325 | GFP_KERNEL); | |
326 | if (unlikely(rc_list->rcl_refcalls == NULL)) | |
327 | goto out; | |
328 | for (i = 0; i < rc_list->rcl_nrefcalls; i++) { | |
329 | rc_list->rcl_refcalls[i].rc_sequenceid = ntohl(*p++); | |
330 | rc_list->rcl_refcalls[i].rc_slotid = ntohl(*p++); | |
331 | } | |
332 | } | |
333 | status = 0; | |
334 | ||
335 | out: | |
336 | return status; | |
337 | } | |
338 | ||
9733f0d9 | 339 | static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp, |
4aece6a1 BH |
340 | struct xdr_stream *xdr, |
341 | struct cb_sequenceargs *args) | |
342 | { | |
9733f0d9 | 343 | __be32 *p; |
4aece6a1 | 344 | int i; |
9733f0d9 | 345 | __be32 status; |
4aece6a1 BH |
346 | |
347 | status = decode_sessionid(xdr, &args->csa_sessionid); | |
348 | if (status) | |
349 | goto out; | |
350 | ||
351 | status = htonl(NFS4ERR_RESOURCE); | |
352 | p = read_buf(xdr, 5 * sizeof(uint32_t)); | |
353 | if (unlikely(p == NULL)) | |
354 | goto out; | |
355 | ||
65fc64e5 | 356 | args->csa_addr = svc_addr(rqstp); |
4aece6a1 BH |
357 | args->csa_sequenceid = ntohl(*p++); |
358 | args->csa_slotid = ntohl(*p++); | |
359 | args->csa_highestslotid = ntohl(*p++); | |
360 | args->csa_cachethis = ntohl(*p++); | |
361 | args->csa_nrclists = ntohl(*p++); | |
362 | args->csa_rclists = NULL; | |
363 | if (args->csa_nrclists) { | |
364 | args->csa_rclists = kmalloc(args->csa_nrclists * | |
365 | sizeof(*args->csa_rclists), | |
366 | GFP_KERNEL); | |
367 | if (unlikely(args->csa_rclists == NULL)) | |
368 | goto out; | |
369 | ||
370 | for (i = 0; i < args->csa_nrclists; i++) { | |
371 | status = decode_rc_list(xdr, &args->csa_rclists[i]); | |
372 | if (status) | |
373 | goto out_free; | |
374 | } | |
375 | } | |
376 | status = 0; | |
377 | ||
378 | dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u slotid %u " | |
379 | "highestslotid %u cachethis %d nrclists %u\n", | |
380 | __func__, | |
381 | ((u32 *)&args->csa_sessionid)[0], | |
382 | ((u32 *)&args->csa_sessionid)[1], | |
383 | ((u32 *)&args->csa_sessionid)[2], | |
384 | ((u32 *)&args->csa_sessionid)[3], | |
385 | args->csa_sequenceid, args->csa_slotid, | |
386 | args->csa_highestslotid, args->csa_cachethis, | |
387 | args->csa_nrclists); | |
388 | out: | |
389 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); | |
390 | return status; | |
391 | ||
392 | out_free: | |
393 | for (i = 0; i < args->csa_nrclists; i++) | |
394 | kfree(args->csa_rclists[i].rcl_refcalls); | |
395 | kfree(args->csa_rclists); | |
396 | goto out; | |
397 | } | |
398 | ||
9733f0d9 | 399 | static __be32 decode_recallany_args(struct svc_rqst *rqstp, |
31f09607 AB |
400 | struct xdr_stream *xdr, |
401 | struct cb_recallanyargs *args) | |
402 | { | |
9733f0d9 | 403 | __be32 *p; |
31f09607 AB |
404 | |
405 | args->craa_addr = svc_addr(rqstp); | |
406 | p = read_buf(xdr, 4); | |
407 | if (unlikely(p == NULL)) | |
408 | return htonl(NFS4ERR_BADXDR); | |
409 | args->craa_objs_to_keep = ntohl(*p++); | |
410 | p = read_buf(xdr, 4); | |
411 | if (unlikely(p == NULL)) | |
412 | return htonl(NFS4ERR_BADXDR); | |
413 | args->craa_type_mask = ntohl(*p); | |
414 | ||
415 | return 0; | |
416 | } | |
417 | ||
9733f0d9 | 418 | static __be32 decode_recallslot_args(struct svc_rqst *rqstp, |
b9efa1b2 AA |
419 | struct xdr_stream *xdr, |
420 | struct cb_recallslotargs *args) | |
421 | { | |
422 | __be32 *p; | |
423 | ||
424 | args->crsa_addr = svc_addr(rqstp); | |
425 | p = read_buf(xdr, 4); | |
426 | if (unlikely(p == NULL)) | |
427 | return htonl(NFS4ERR_BADXDR); | |
428 | args->crsa_target_max_slots = ntohl(*p++); | |
429 | return 0; | |
430 | } | |
431 | ||
4aece6a1 BH |
432 | #endif /* CONFIG_NFS_V4_1 */ |
433 | ||
e6f684f6 | 434 | static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str) |
1da177e4 | 435 | { |
5704fdeb | 436 | __be32 *p; |
1da177e4 LT |
437 | |
438 | p = xdr_reserve_space(xdr, 4 + len); | |
439 | if (unlikely(p == NULL)) | |
440 | return htonl(NFS4ERR_RESOURCE); | |
441 | xdr_encode_opaque(p, str, len); | |
442 | return 0; | |
443 | } | |
444 | ||
445 | #define CB_SUPPORTED_ATTR0 (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) | |
446 | #define CB_SUPPORTED_ATTR1 (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) | |
5704fdeb | 447 | static __be32 encode_attr_bitmap(struct xdr_stream *xdr, const uint32_t *bitmap, __be32 **savep) |
1da177e4 | 448 | { |
5704fdeb AV |
449 | __be32 bm[2]; |
450 | __be32 *p; | |
1da177e4 LT |
451 | |
452 | bm[0] = htonl(bitmap[0] & CB_SUPPORTED_ATTR0); | |
453 | bm[1] = htonl(bitmap[1] & CB_SUPPORTED_ATTR1); | |
454 | if (bm[1] != 0) { | |
455 | p = xdr_reserve_space(xdr, 16); | |
456 | if (unlikely(p == NULL)) | |
457 | return htonl(NFS4ERR_RESOURCE); | |
458 | *p++ = htonl(2); | |
459 | *p++ = bm[0]; | |
460 | *p++ = bm[1]; | |
461 | } else if (bm[0] != 0) { | |
462 | p = xdr_reserve_space(xdr, 12); | |
463 | if (unlikely(p == NULL)) | |
464 | return htonl(NFS4ERR_RESOURCE); | |
465 | *p++ = htonl(1); | |
466 | *p++ = bm[0]; | |
467 | } else { | |
468 | p = xdr_reserve_space(xdr, 8); | |
469 | if (unlikely(p == NULL)) | |
470 | return htonl(NFS4ERR_RESOURCE); | |
471 | *p++ = htonl(0); | |
472 | } | |
473 | *savep = p; | |
474 | return 0; | |
475 | } | |
476 | ||
e6f684f6 | 477 | static __be32 encode_attr_change(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t change) |
1da177e4 | 478 | { |
5704fdeb | 479 | __be32 *p; |
1da177e4 LT |
480 | |
481 | if (!(bitmap[0] & FATTR4_WORD0_CHANGE)) | |
482 | return 0; | |
483 | p = xdr_reserve_space(xdr, 8); | |
90dc7d27 | 484 | if (unlikely(!p)) |
1da177e4 LT |
485 | return htonl(NFS4ERR_RESOURCE); |
486 | p = xdr_encode_hyper(p, change); | |
487 | return 0; | |
488 | } | |
489 | ||
e6f684f6 | 490 | static __be32 encode_attr_size(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t size) |
1da177e4 | 491 | { |
5704fdeb | 492 | __be32 *p; |
1da177e4 LT |
493 | |
494 | if (!(bitmap[0] & FATTR4_WORD0_SIZE)) | |
495 | return 0; | |
496 | p = xdr_reserve_space(xdr, 8); | |
90dc7d27 | 497 | if (unlikely(!p)) |
1da177e4 LT |
498 | return htonl(NFS4ERR_RESOURCE); |
499 | p = xdr_encode_hyper(p, size); | |
500 | return 0; | |
501 | } | |
502 | ||
e6f684f6 | 503 | static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec *time) |
1da177e4 | 504 | { |
5704fdeb | 505 | __be32 *p; |
1da177e4 LT |
506 | |
507 | p = xdr_reserve_space(xdr, 12); | |
90dc7d27 | 508 | if (unlikely(!p)) |
1da177e4 LT |
509 | return htonl(NFS4ERR_RESOURCE); |
510 | p = xdr_encode_hyper(p, time->tv_sec); | |
511 | *p = htonl(time->tv_nsec); | |
512 | return 0; | |
513 | } | |
514 | ||
e6f684f6 | 515 | static __be32 encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) |
1da177e4 LT |
516 | { |
517 | if (!(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) | |
518 | return 0; | |
519 | return encode_attr_time(xdr,time); | |
520 | } | |
521 | ||
e6f684f6 | 522 | static __be32 encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) |
1da177e4 LT |
523 | { |
524 | if (!(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) | |
525 | return 0; | |
526 | return encode_attr_time(xdr,time); | |
527 | } | |
528 | ||
e6f684f6 | 529 | static __be32 encode_compound_hdr_res(struct xdr_stream *xdr, struct cb_compound_hdr_res *hdr) |
1da177e4 | 530 | { |
e6f684f6 | 531 | __be32 status; |
1da177e4 LT |
532 | |
533 | hdr->status = xdr_reserve_space(xdr, 4); | |
534 | if (unlikely(hdr->status == NULL)) | |
535 | return htonl(NFS4ERR_RESOURCE); | |
536 | status = encode_string(xdr, hdr->taglen, hdr->tag); | |
537 | if (unlikely(status != 0)) | |
538 | return status; | |
539 | hdr->nops = xdr_reserve_space(xdr, 4); | |
540 | if (unlikely(hdr->nops == NULL)) | |
541 | return htonl(NFS4ERR_RESOURCE); | |
542 | return 0; | |
543 | } | |
544 | ||
e6f684f6 | 545 | static __be32 encode_op_hdr(struct xdr_stream *xdr, uint32_t op, __be32 res) |
1da177e4 | 546 | { |
5704fdeb | 547 | __be32 *p; |
1da177e4 LT |
548 | |
549 | p = xdr_reserve_space(xdr, 8); | |
550 | if (unlikely(p == NULL)) | |
31d2b435 | 551 | return htonl(NFS4ERR_RESOURCE_HDR); |
1da177e4 LT |
552 | *p++ = htonl(op); |
553 | *p = res; | |
554 | return 0; | |
555 | } | |
556 | ||
e6f684f6 | 557 | static __be32 encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr, const struct cb_getattrres *res) |
1da177e4 | 558 | { |
5704fdeb | 559 | __be32 *savep = NULL; |
e6f684f6 | 560 | __be32 status = res->status; |
1da177e4 LT |
561 | |
562 | if (unlikely(status != 0)) | |
563 | goto out; | |
564 | status = encode_attr_bitmap(xdr, res->bitmap, &savep); | |
565 | if (unlikely(status != 0)) | |
566 | goto out; | |
567 | status = encode_attr_change(xdr, res->bitmap, res->change_attr); | |
568 | if (unlikely(status != 0)) | |
569 | goto out; | |
570 | status = encode_attr_size(xdr, res->bitmap, res->size); | |
571 | if (unlikely(status != 0)) | |
572 | goto out; | |
573 | status = encode_attr_ctime(xdr, res->bitmap, &res->ctime); | |
574 | if (unlikely(status != 0)) | |
575 | goto out; | |
576 | status = encode_attr_mtime(xdr, res->bitmap, &res->mtime); | |
577 | *savep = htonl((unsigned int)((char *)xdr->p - (char *)(savep+1))); | |
578 | out: | |
3110ff80 | 579 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); |
1da177e4 LT |
580 | return status; |
581 | } | |
582 | ||
34bc47c9 BH |
583 | #if defined(CONFIG_NFS_V4_1) |
584 | ||
9733f0d9 | 585 | static __be32 encode_sessionid(struct xdr_stream *xdr, |
4aece6a1 BH |
586 | const struct nfs4_sessionid *sid) |
587 | { | |
9733f0d9 | 588 | __be32 *p; |
4aece6a1 BH |
589 | int len = NFS4_MAX_SESSIONID_LEN; |
590 | ||
591 | p = xdr_reserve_space(xdr, len); | |
592 | if (unlikely(p == NULL)) | |
593 | return htonl(NFS4ERR_RESOURCE); | |
594 | ||
595 | memcpy(p, sid, len); | |
596 | return 0; | |
597 | } | |
598 | ||
9733f0d9 | 599 | static __be32 encode_cb_sequence_res(struct svc_rqst *rqstp, |
4aece6a1 BH |
600 | struct xdr_stream *xdr, |
601 | const struct cb_sequenceres *res) | |
602 | { | |
9733f0d9 | 603 | __be32 *p; |
4aece6a1 BH |
604 | unsigned status = res->csr_status; |
605 | ||
606 | if (unlikely(status != 0)) | |
607 | goto out; | |
608 | ||
609 | encode_sessionid(xdr, &res->csr_sessionid); | |
610 | ||
611 | p = xdr_reserve_space(xdr, 4 * sizeof(uint32_t)); | |
612 | if (unlikely(p == NULL)) | |
613 | return htonl(NFS4ERR_RESOURCE); | |
614 | ||
615 | *p++ = htonl(res->csr_sequenceid); | |
616 | *p++ = htonl(res->csr_slotid); | |
617 | *p++ = htonl(res->csr_highestslotid); | |
618 | *p++ = htonl(res->csr_target_highestslotid); | |
619 | out: | |
620 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); | |
621 | return status; | |
622 | } | |
623 | ||
34bc47c9 BH |
624 | static __be32 |
625 | preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) | |
626 | { | |
281fe15d BH |
627 | if (op_nr == OP_CB_SEQUENCE) { |
628 | if (nop != 0) | |
629 | return htonl(NFS4ERR_SEQUENCE_POS); | |
630 | } else { | |
631 | if (nop == 0) | |
632 | return htonl(NFS4ERR_OP_NOT_IN_SESSION); | |
633 | } | |
634 | ||
34bc47c9 BH |
635 | switch (op_nr) { |
636 | case OP_CB_GETATTR: | |
637 | case OP_CB_RECALL: | |
4aece6a1 | 638 | case OP_CB_SEQUENCE: |
31f09607 | 639 | case OP_CB_RECALL_ANY: |
b9efa1b2 | 640 | case OP_CB_RECALL_SLOT: |
f2a62561 | 641 | case OP_CB_LAYOUTRECALL: |
34bc47c9 BH |
642 | *op = &callback_ops[op_nr]; |
643 | break; | |
644 | ||
34bc47c9 BH |
645 | case OP_CB_NOTIFY_DEVICEID: |
646 | case OP_CB_NOTIFY: | |
647 | case OP_CB_PUSH_DELEG: | |
34bc47c9 | 648 | case OP_CB_RECALLABLE_OBJ_AVAIL: |
34bc47c9 BH |
649 | case OP_CB_WANTS_CANCELLED: |
650 | case OP_CB_NOTIFY_LOCK: | |
651 | return htonl(NFS4ERR_NOTSUPP); | |
652 | ||
653 | default: | |
654 | return htonl(NFS4ERR_OP_ILLEGAL); | |
655 | } | |
656 | ||
657 | return htonl(NFS_OK); | |
658 | } | |
659 | ||
42acd021 AA |
660 | static void nfs4_callback_free_slot(struct nfs4_session *session) |
661 | { | |
662 | struct nfs4_slot_table *tbl = &session->bc_slot_table; | |
663 | ||
664 | spin_lock(&tbl->slot_tbl_lock); | |
665 | /* | |
666 | * Let the state manager know callback processing done. | |
667 | * A single slot, so highest used slotid is either 0 or -1 | |
668 | */ | |
669 | tbl->highest_used_slotid--; | |
670 | nfs4_check_drain_bc_complete(session); | |
671 | spin_unlock(&tbl->slot_tbl_lock); | |
672 | } | |
673 | ||
674 | static void nfs4_cb_free_slot(struct nfs_client *clp) | |
675 | { | |
676 | if (clp && clp->cl_session) | |
677 | nfs4_callback_free_slot(clp->cl_session); | |
678 | } | |
679 | ||
680 | /* A single slot, so highest used slotid is either 0 or -1 */ | |
681 | void nfs4_cb_take_slot(struct nfs_client *clp) | |
682 | { | |
683 | struct nfs4_slot_table *tbl = &clp->cl_session->bc_slot_table; | |
684 | ||
685 | spin_lock(&tbl->slot_tbl_lock); | |
686 | tbl->highest_used_slotid++; | |
687 | BUG_ON(tbl->highest_used_slotid != 0); | |
688 | spin_unlock(&tbl->slot_tbl_lock); | |
689 | } | |
690 | ||
34bc47c9 BH |
691 | #else /* CONFIG_NFS_V4_1 */ |
692 | ||
693 | static __be32 | |
694 | preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) | |
695 | { | |
696 | return htonl(NFS4ERR_MINOR_VERS_MISMATCH); | |
697 | } | |
698 | ||
42acd021 AA |
699 | static void nfs4_cb_free_slot(struct nfs_client *clp) |
700 | { | |
701 | } | |
34bc47c9 BH |
702 | #endif /* CONFIG_NFS_V4_1 */ |
703 | ||
704 | static __be32 | |
705 | preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op) | |
706 | { | |
707 | switch (op_nr) { | |
708 | case OP_CB_GETATTR: | |
709 | case OP_CB_RECALL: | |
710 | *op = &callback_ops[op_nr]; | |
711 | break; | |
712 | default: | |
713 | return htonl(NFS4ERR_OP_ILLEGAL); | |
714 | } | |
715 | ||
716 | return htonl(NFS_OK); | |
717 | } | |
718 | ||
719 | static __be32 process_op(uint32_t minorversion, int nop, | |
720 | struct svc_rqst *rqstp, | |
1da177e4 | 721 | struct xdr_stream *xdr_in, void *argp, |
c36fca52 AA |
722 | struct xdr_stream *xdr_out, void *resp, |
723 | struct cb_process_state *cps) | |
1da177e4 | 724 | { |
a162a6b8 | 725 | struct callback_op *op = &callback_ops[0]; |
31d2b435 | 726 | unsigned int op_nr; |
34bc47c9 | 727 | __be32 status; |
1da177e4 | 728 | long maxlen; |
e6f684f6 | 729 | __be32 res; |
1da177e4 | 730 | |
3110ff80 | 731 | dprintk("%s: start\n", __func__); |
1da177e4 | 732 | status = decode_op_hdr(xdr_in, &op_nr); |
31d2b435 AA |
733 | if (unlikely(status)) |
734 | return status; | |
1da177e4 | 735 | |
34bc47c9 BH |
736 | dprintk("%s: minorversion=%d nop=%d op_nr=%u\n", |
737 | __func__, minorversion, nop, op_nr); | |
738 | ||
739 | status = minorversion ? preprocess_nfs41_op(nop, op_nr, &op) : | |
740 | preprocess_nfs4_op(op_nr, &op); | |
741 | if (status == htonl(NFS4ERR_OP_ILLEGAL)) | |
742 | op_nr = OP_CB_ILLEGAL; | |
b92b3019 AA |
743 | if (status) |
744 | goto encode_hdr; | |
31d2b435 | 745 | |
c36fca52 AA |
746 | if (cps->drc_status) { |
747 | status = cps->drc_status; | |
4911096f AA |
748 | goto encode_hdr; |
749 | } | |
750 | ||
1da177e4 LT |
751 | maxlen = xdr_out->end - xdr_out->p; |
752 | if (maxlen > 0 && maxlen < PAGE_SIZE) { | |
e95e60da AA |
753 | status = op->decode_args(rqstp, xdr_in, argp); |
754 | if (likely(status == 0)) | |
c36fca52 | 755 | status = op->process_op(argp, resp, cps); |
1da177e4 LT |
756 | } else |
757 | status = htonl(NFS4ERR_RESOURCE); | |
758 | ||
b92b3019 | 759 | encode_hdr: |
1da177e4 | 760 | res = encode_op_hdr(xdr_out, op_nr, status); |
31d2b435 AA |
761 | if (unlikely(res)) |
762 | return res; | |
1da177e4 LT |
763 | if (op->encode_res != NULL && status == 0) |
764 | status = op->encode_res(rqstp, xdr_out, resp); | |
3110ff80 | 765 | dprintk("%s: done, status = %d\n", __func__, ntohl(status)); |
1da177e4 LT |
766 | return status; |
767 | } | |
768 | ||
769 | /* | |
770 | * Decode, process and encode a COMPOUND | |
771 | */ | |
7111c66e | 772 | static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *resp) |
1da177e4 | 773 | { |
3a6258e1 TM |
774 | struct cb_compound_hdr_arg hdr_arg = { 0 }; |
775 | struct cb_compound_hdr_res hdr_res = { NULL }; | |
1da177e4 | 776 | struct xdr_stream xdr_in, xdr_out; |
c36fca52 AA |
777 | __be32 *p, status; |
778 | struct cb_process_state cps = { | |
779 | .drc_status = 0, | |
780 | .clp = NULL, | |
781 | }; | |
3a6258e1 | 782 | unsigned int nops = 0; |
1da177e4 | 783 | |
3110ff80 | 784 | dprintk("%s: start\n", __func__); |
1da177e4 LT |
785 | |
786 | xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base); | |
787 | ||
5704fdeb | 788 | p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len); |
1da177e4 LT |
789 | xdr_init_encode(&xdr_out, &rqstp->rq_res, p); |
790 | ||
3a6258e1 TM |
791 | status = decode_compound_hdr_arg(&xdr_in, &hdr_arg); |
792 | if (status == __constant_htonl(NFS4ERR_RESOURCE)) | |
793 | return rpc_garbage_args; | |
794 | ||
c36fca52 AA |
795 | if (hdr_arg.minorversion == 0) { |
796 | cps.clp = nfs4_find_client_ident(hdr_arg.cb_ident); | |
797 | if (!cps.clp) | |
798 | return rpc_drop_reply; | |
799 | } else | |
800 | cps.svc_sid = bc_xprt_sid(rqstp); | |
801 | ||
1da177e4 LT |
802 | hdr_res.taglen = hdr_arg.taglen; |
803 | hdr_res.tag = hdr_arg.tag; | |
3a6258e1 TM |
804 | if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0) |
805 | return rpc_system_err; | |
1da177e4 | 806 | |
3a6258e1 | 807 | while (status == 0 && nops != hdr_arg.nops) { |
4911096f | 808 | status = process_op(hdr_arg.minorversion, nops, rqstp, |
c36fca52 | 809 | &xdr_in, argp, &xdr_out, resp, &cps); |
1da177e4 LT |
810 | nops++; |
811 | } | |
3a6258e1 | 812 | |
31d2b435 AA |
813 | /* Buffer overflow in decode_ops_hdr or encode_ops_hdr. Return |
814 | * resource error in cb_compound status without returning op */ | |
815 | if (unlikely(status == htonl(NFS4ERR_RESOURCE_HDR))) { | |
816 | status = htonl(NFS4ERR_RESOURCE); | |
817 | nops--; | |
818 | } | |
819 | ||
1da177e4 LT |
820 | *hdr_res.status = status; |
821 | *hdr_res.nops = htonl(nops); | |
42acd021 | 822 | nfs4_cb_free_slot(cps.clp); |
c36fca52 | 823 | nfs_put_client(cps.clp); |
3110ff80 | 824 | dprintk("%s: done, status = %u\n", __func__, ntohl(status)); |
1da177e4 LT |
825 | return rpc_success; |
826 | } | |
827 | ||
828 | /* | |
829 | * Define NFS4 callback COMPOUND ops. | |
830 | */ | |
831 | static struct callback_op callback_ops[] = { | |
832 | [0] = { | |
833 | .res_maxsize = CB_OP_HDR_RES_MAXSZ, | |
834 | }, | |
835 | [OP_CB_GETATTR] = { | |
836 | .process_op = (callback_process_op_t)nfs4_callback_getattr, | |
837 | .decode_args = (callback_decode_arg_t)decode_getattr_args, | |
838 | .encode_res = (callback_encode_res_t)encode_getattr_res, | |
839 | .res_maxsize = CB_OP_GETATTR_RES_MAXSZ, | |
840 | }, | |
841 | [OP_CB_RECALL] = { | |
842 | .process_op = (callback_process_op_t)nfs4_callback_recall, | |
843 | .decode_args = (callback_decode_arg_t)decode_recall_args, | |
844 | .res_maxsize = CB_OP_RECALL_RES_MAXSZ, | |
4aece6a1 BH |
845 | }, |
846 | #if defined(CONFIG_NFS_V4_1) | |
f2a62561 FI |
847 | [OP_CB_LAYOUTRECALL] = { |
848 | .process_op = (callback_process_op_t)nfs4_callback_layoutrecall, | |
849 | .decode_args = | |
850 | (callback_decode_arg_t)decode_layoutrecall_args, | |
851 | .res_maxsize = CB_OP_LAYOUTRECALL_RES_MAXSZ, | |
852 | }, | |
4aece6a1 BH |
853 | [OP_CB_SEQUENCE] = { |
854 | .process_op = (callback_process_op_t)nfs4_callback_sequence, | |
855 | .decode_args = (callback_decode_arg_t)decode_cb_sequence_args, | |
856 | .encode_res = (callback_encode_res_t)encode_cb_sequence_res, | |
857 | .res_maxsize = CB_OP_SEQUENCE_RES_MAXSZ, | |
858 | }, | |
31f09607 AB |
859 | [OP_CB_RECALL_ANY] = { |
860 | .process_op = (callback_process_op_t)nfs4_callback_recallany, | |
861 | .decode_args = (callback_decode_arg_t)decode_recallany_args, | |
862 | .res_maxsize = CB_OP_RECALLANY_RES_MAXSZ, | |
863 | }, | |
b9efa1b2 AA |
864 | [OP_CB_RECALL_SLOT] = { |
865 | .process_op = (callback_process_op_t)nfs4_callback_recallslot, | |
866 | .decode_args = (callback_decode_arg_t)decode_recallslot_args, | |
867 | .res_maxsize = CB_OP_RECALLSLOT_RES_MAXSZ, | |
868 | }, | |
4aece6a1 | 869 | #endif /* CONFIG_NFS_V4_1 */ |
1da177e4 LT |
870 | }; |
871 | ||
872 | /* | |
873 | * Define NFS4 callback procedures | |
874 | */ | |
875 | static struct svc_procedure nfs4_callback_procedures1[] = { | |
876 | [CB_NULL] = { | |
877 | .pc_func = nfs4_callback_null, | |
878 | .pc_decode = (kxdrproc_t)nfs4_decode_void, | |
879 | .pc_encode = (kxdrproc_t)nfs4_encode_void, | |
880 | .pc_xdrressize = 1, | |
881 | }, | |
882 | [CB_COMPOUND] = { | |
883 | .pc_func = nfs4_callback_compound, | |
884 | .pc_encode = (kxdrproc_t)nfs4_encode_void, | |
885 | .pc_argsize = 256, | |
886 | .pc_ressize = 256, | |
887 | .pc_xdrressize = NFS4_CALLBACK_BUFSIZE, | |
888 | } | |
889 | }; | |
890 | ||
891 | struct svc_version nfs4_callback_version1 = { | |
892 | .vs_vers = 1, | |
893 | .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), | |
894 | .vs_proc = nfs4_callback_procedures1, | |
895 | .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, | |
896 | .vs_dispatch = NULL, | |
49697ee7 | 897 | .vs_hidden = 1, |
1da177e4 LT |
898 | }; |
899 | ||
07bccc2d AB |
900 | struct svc_version nfs4_callback_version4 = { |
901 | .vs_vers = 4, | |
902 | .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), | |
903 | .vs_proc = nfs4_callback_procedures1, | |
904 | .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, | |
905 | .vs_dispatch = NULL, | |
906 | }; |