| 1 | /* |
| 2 | * linux/fs/nfs/callback_xdr.c |
| 3 | * |
| 4 | * Copyright (C) 2004 Trond Myklebust |
| 5 | * |
| 6 | * NFSv4 callback encode/decode procedures |
| 7 | */ |
| 8 | #include <linux/kernel.h> |
| 9 | #include <linux/sunrpc/svc.h> |
| 10 | #include <linux/nfs4.h> |
| 11 | #include <linux/nfs_fs.h> |
| 12 | #include <linux/ratelimit.h> |
| 13 | #include <linux/printk.h> |
| 14 | #include <linux/slab.h> |
| 15 | #include <linux/sunrpc/bc_xprt.h> |
| 16 | #include "nfs4_fs.h" |
| 17 | #include "callback.h" |
| 18 | #include "internal.h" |
| 19 | #include "nfs4session.h" |
| 20 | |
| 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) |
| 29 | |
| 30 | #if defined(CONFIG_NFS_V4_1) |
| 31 | #define CB_OP_LAYOUTRECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
| 32 | #define CB_OP_DEVICENOTIFY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
| 33 | #define CB_OP_SEQUENCE_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \ |
| 34 | NFS4_MAX_SESSIONID_LEN + \ |
| 35 | (1 + 3) * 4) // seqid, 3 slotids |
| 36 | #define CB_OP_RECALLANY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
| 37 | #define CB_OP_RECALLSLOT_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
| 38 | #endif /* CONFIG_NFS_V4_1 */ |
| 39 | |
| 40 | #define NFSDBG_FACILITY NFSDBG_CALLBACK |
| 41 | |
| 42 | /* Internal error code */ |
| 43 | #define NFS4ERR_RESOURCE_HDR 11050 |
| 44 | |
| 45 | typedef __be32 (*callback_process_op_t)(void *, void *, |
| 46 | struct cb_process_state *); |
| 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 *); |
| 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 | |
| 60 | static __be32 nfs4_callback_null(struct svc_rqst *rqstp, void *argp, void *resp) |
| 61 | { |
| 62 | return htonl(NFS4_OK); |
| 63 | } |
| 64 | |
| 65 | static int nfs4_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
| 66 | { |
| 67 | return xdr_argsize_check(rqstp, p); |
| 68 | } |
| 69 | |
| 70 | static int nfs4_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
| 71 | { |
| 72 | return xdr_ressize_check(rqstp, p); |
| 73 | } |
| 74 | |
| 75 | static __be32 *read_buf(struct xdr_stream *xdr, int nbytes) |
| 76 | { |
| 77 | __be32 *p; |
| 78 | |
| 79 | p = xdr_inline_decode(xdr, nbytes); |
| 80 | if (unlikely(p == NULL)) |
| 81 | printk(KERN_WARNING "NFS: NFSv4 callback reply buffer overflowed!\n"); |
| 82 | return p; |
| 83 | } |
| 84 | |
| 85 | static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len, const char **str) |
| 86 | { |
| 87 | __be32 *p; |
| 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 | |
| 105 | static __be32 decode_fh(struct xdr_stream *xdr, struct nfs_fh *fh) |
| 106 | { |
| 107 | __be32 *p; |
| 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 | |
| 123 | static __be32 decode_bitmap(struct xdr_stream *xdr, uint32_t *bitmap) |
| 124 | { |
| 125 | __be32 *p; |
| 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 | |
| 142 | static __be32 decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) |
| 143 | { |
| 144 | __be32 *p; |
| 145 | |
| 146 | p = read_buf(xdr, NFS4_STATEID_SIZE); |
| 147 | if (unlikely(p == NULL)) |
| 148 | return htonl(NFS4ERR_RESOURCE); |
| 149 | memcpy(stateid->data, p, NFS4_STATEID_SIZE); |
| 150 | return 0; |
| 151 | } |
| 152 | |
| 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 | |
| 159 | static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound_hdr_arg *hdr) |
| 160 | { |
| 161 | __be32 *p; |
| 162 | __be32 status; |
| 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! */ |
| 168 | if (hdr->taglen > CB_OP_TAGLEN_MAXSZ) { |
| 169 | printk("NFS: NFSv4 CALLBACK %s: client sent tag of length %u\n", |
| 170 | __func__, hdr->taglen); |
| 171 | return htonl(NFS4ERR_RESOURCE); |
| 172 | } |
| 173 | p = read_buf(xdr, 12); |
| 174 | if (unlikely(p == NULL)) |
| 175 | return htonl(NFS4ERR_RESOURCE); |
| 176 | hdr->minorversion = ntohl(*p++); |
| 177 | /* Check for minor version support */ |
| 178 | if (hdr->minorversion <= NFS4_MAX_MINOR_VERSION) { |
| 179 | hdr->cb_ident = ntohl(*p++); /* ignored by v4.1 and v4.2 */ |
| 180 | } else { |
| 181 | pr_warn_ratelimited("NFS: %s: NFSv4 server callback with " |
| 182 | "illegal minor version %u!\n", |
| 183 | __func__, hdr->minorversion); |
| 184 | return htonl(NFS4ERR_MINOR_VERS_MISMATCH); |
| 185 | } |
| 186 | hdr->nops = ntohl(*p); |
| 187 | dprintk("%s: minorversion %d nops %d\n", __func__, |
| 188 | hdr->minorversion, hdr->nops); |
| 189 | return 0; |
| 190 | } |
| 191 | |
| 192 | static __be32 decode_op_hdr(struct xdr_stream *xdr, unsigned int *op) |
| 193 | { |
| 194 | __be32 *p; |
| 195 | p = read_buf(xdr, 4); |
| 196 | if (unlikely(p == NULL)) |
| 197 | return htonl(NFS4ERR_RESOURCE_HDR); |
| 198 | *op = ntohl(*p); |
| 199 | return 0; |
| 200 | } |
| 201 | |
| 202 | static __be32 decode_getattr_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_getattrargs *args) |
| 203 | { |
| 204 | __be32 status; |
| 205 | |
| 206 | status = decode_fh(xdr, &args->fh); |
| 207 | if (unlikely(status != 0)) |
| 208 | goto out; |
| 209 | status = decode_bitmap(xdr, args->bitmap); |
| 210 | out: |
| 211 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); |
| 212 | return status; |
| 213 | } |
| 214 | |
| 215 | static __be32 decode_recall_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_recallargs *args) |
| 216 | { |
| 217 | __be32 *p; |
| 218 | __be32 status; |
| 219 | |
| 220 | status = decode_delegation_stateid(xdr, &args->stateid); |
| 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: |
| 231 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); |
| 232 | return status; |
| 233 | } |
| 234 | |
| 235 | #if defined(CONFIG_NFS_V4_1) |
| 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 | } |
| 241 | |
| 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 | |
| 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, |
| 258 | * as it is unusable and ignored with the other types. |
| 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); |
| 277 | status = decode_layout_stateid(xdr, &args->cbl_stateid); |
| 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 | |
| 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; |
| 321 | if (n > ULONG_MAX / sizeof(*args->devs)) { |
| 322 | status = htonl(NFS4ERR_BADXDR); |
| 323 | goto out; |
| 324 | } |
| 325 | |
| 326 | args->devs = kmalloc_array(n, sizeof(*args->devs), GFP_KERNEL); |
| 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 | |
| 392 | static __be32 decode_sessionid(struct xdr_stream *xdr, |
| 393 | struct nfs4_sessionid *sid) |
| 394 | { |
| 395 | __be32 *p; |
| 396 | |
| 397 | p = read_buf(xdr, NFS4_MAX_SESSIONID_LEN); |
| 398 | if (unlikely(p == NULL)) |
| 399 | return htonl(NFS4ERR_RESOURCE); |
| 400 | |
| 401 | memcpy(sid->data, p, NFS4_MAX_SESSIONID_LEN); |
| 402 | return 0; |
| 403 | } |
| 404 | |
| 405 | static __be32 decode_rc_list(struct xdr_stream *xdr, |
| 406 | struct referring_call_list *rc_list) |
| 407 | { |
| 408 | __be32 *p; |
| 409 | int i; |
| 410 | __be32 status; |
| 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; |
| 427 | rc_list->rcl_refcalls = kmalloc_array(rc_list->rcl_nrefcalls, |
| 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 | |
| 443 | static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp, |
| 444 | struct xdr_stream *xdr, |
| 445 | struct cb_sequenceargs *args) |
| 446 | { |
| 447 | __be32 *p; |
| 448 | int i; |
| 449 | __be32 status; |
| 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 | |
| 460 | args->csa_addr = svc_addr(rqstp); |
| 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) { |
| 468 | args->csa_rclists = kmalloc_array(args->csa_nrclists, |
| 469 | sizeof(*args->csa_rclists), |
| 470 | GFP_KERNEL); |
| 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]); |
| 476 | if (status) { |
| 477 | args->csa_nrclists = i; |
| 478 | goto out_free; |
| 479 | } |
| 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 | |
| 505 | static __be32 decode_recallany_args(struct svc_rqst *rqstp, |
| 506 | struct xdr_stream *xdr, |
| 507 | struct cb_recallanyargs *args) |
| 508 | { |
| 509 | uint32_t bitmap[2]; |
| 510 | __be32 *p, status; |
| 511 | |
| 512 | p = read_buf(xdr, 4); |
| 513 | if (unlikely(p == NULL)) |
| 514 | return htonl(NFS4ERR_BADXDR); |
| 515 | args->craa_objs_to_keep = ntohl(*p++); |
| 516 | status = decode_bitmap(xdr, bitmap); |
| 517 | if (unlikely(status)) |
| 518 | return status; |
| 519 | args->craa_type_mask = bitmap[0]; |
| 520 | |
| 521 | return 0; |
| 522 | } |
| 523 | |
| 524 | static __be32 decode_recallslot_args(struct svc_rqst *rqstp, |
| 525 | struct xdr_stream *xdr, |
| 526 | struct cb_recallslotargs *args) |
| 527 | { |
| 528 | __be32 *p; |
| 529 | |
| 530 | p = read_buf(xdr, 4); |
| 531 | if (unlikely(p == NULL)) |
| 532 | return htonl(NFS4ERR_BADXDR); |
| 533 | args->crsa_target_highest_slotid = ntohl(*p++); |
| 534 | return 0; |
| 535 | } |
| 536 | |
| 537 | #endif /* CONFIG_NFS_V4_1 */ |
| 538 | |
| 539 | static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str) |
| 540 | { |
| 541 | __be32 *p; |
| 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) |
| 552 | static __be32 encode_attr_bitmap(struct xdr_stream *xdr, const uint32_t *bitmap, __be32 **savep) |
| 553 | { |
| 554 | __be32 bm[2]; |
| 555 | __be32 *p; |
| 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 | |
| 582 | static __be32 encode_attr_change(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t change) |
| 583 | { |
| 584 | __be32 *p; |
| 585 | |
| 586 | if (!(bitmap[0] & FATTR4_WORD0_CHANGE)) |
| 587 | return 0; |
| 588 | p = xdr_reserve_space(xdr, 8); |
| 589 | if (unlikely(!p)) |
| 590 | return htonl(NFS4ERR_RESOURCE); |
| 591 | p = xdr_encode_hyper(p, change); |
| 592 | return 0; |
| 593 | } |
| 594 | |
| 595 | static __be32 encode_attr_size(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t size) |
| 596 | { |
| 597 | __be32 *p; |
| 598 | |
| 599 | if (!(bitmap[0] & FATTR4_WORD0_SIZE)) |
| 600 | return 0; |
| 601 | p = xdr_reserve_space(xdr, 8); |
| 602 | if (unlikely(!p)) |
| 603 | return htonl(NFS4ERR_RESOURCE); |
| 604 | p = xdr_encode_hyper(p, size); |
| 605 | return 0; |
| 606 | } |
| 607 | |
| 608 | static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec *time) |
| 609 | { |
| 610 | __be32 *p; |
| 611 | |
| 612 | p = xdr_reserve_space(xdr, 12); |
| 613 | if (unlikely(!p)) |
| 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 | |
| 620 | static __be32 encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) |
| 621 | { |
| 622 | if (!(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) |
| 623 | return 0; |
| 624 | return encode_attr_time(xdr,time); |
| 625 | } |
| 626 | |
| 627 | static __be32 encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) |
| 628 | { |
| 629 | if (!(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) |
| 630 | return 0; |
| 631 | return encode_attr_time(xdr,time); |
| 632 | } |
| 633 | |
| 634 | static __be32 encode_compound_hdr_res(struct xdr_stream *xdr, struct cb_compound_hdr_res *hdr) |
| 635 | { |
| 636 | __be32 status; |
| 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 | |
| 650 | static __be32 encode_op_hdr(struct xdr_stream *xdr, uint32_t op, __be32 res) |
| 651 | { |
| 652 | __be32 *p; |
| 653 | |
| 654 | p = xdr_reserve_space(xdr, 8); |
| 655 | if (unlikely(p == NULL)) |
| 656 | return htonl(NFS4ERR_RESOURCE_HDR); |
| 657 | *p++ = htonl(op); |
| 658 | *p = res; |
| 659 | return 0; |
| 660 | } |
| 661 | |
| 662 | static __be32 encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr, const struct cb_getattrres *res) |
| 663 | { |
| 664 | __be32 *savep = NULL; |
| 665 | __be32 status = res->status; |
| 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: |
| 684 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); |
| 685 | return status; |
| 686 | } |
| 687 | |
| 688 | #if defined(CONFIG_NFS_V4_1) |
| 689 | |
| 690 | static __be32 encode_sessionid(struct xdr_stream *xdr, |
| 691 | const struct nfs4_sessionid *sid) |
| 692 | { |
| 693 | __be32 *p; |
| 694 | |
| 695 | p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN); |
| 696 | if (unlikely(p == NULL)) |
| 697 | return htonl(NFS4ERR_RESOURCE); |
| 698 | |
| 699 | memcpy(p, sid, NFS4_MAX_SESSIONID_LEN); |
| 700 | return 0; |
| 701 | } |
| 702 | |
| 703 | static __be32 encode_cb_sequence_res(struct svc_rqst *rqstp, |
| 704 | struct xdr_stream *xdr, |
| 705 | const struct cb_sequenceres *res) |
| 706 | { |
| 707 | __be32 *p; |
| 708 | __be32 status = res->csr_status; |
| 709 | |
| 710 | if (unlikely(status != 0)) |
| 711 | goto out; |
| 712 | |
| 713 | status = encode_sessionid(xdr, &res->csr_sessionid); |
| 714 | if (status) |
| 715 | goto out; |
| 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 | |
| 730 | static __be32 |
| 731 | preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) |
| 732 | { |
| 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 | |
| 741 | switch (op_nr) { |
| 742 | case OP_CB_GETATTR: |
| 743 | case OP_CB_RECALL: |
| 744 | case OP_CB_SEQUENCE: |
| 745 | case OP_CB_RECALL_ANY: |
| 746 | case OP_CB_RECALL_SLOT: |
| 747 | case OP_CB_LAYOUTRECALL: |
| 748 | case OP_CB_NOTIFY_DEVICEID: |
| 749 | *op = &callback_ops[op_nr]; |
| 750 | break; |
| 751 | |
| 752 | case OP_CB_NOTIFY: |
| 753 | case OP_CB_PUSH_DELEG: |
| 754 | case OP_CB_RECALLABLE_OBJ_AVAIL: |
| 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 | |
| 766 | static void nfs4_callback_free_slot(struct nfs4_session *session, |
| 767 | struct nfs4_slot *slot) |
| 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 | */ |
| 776 | nfs4_free_slot(tbl, slot); |
| 777 | nfs4_slot_tbl_drain_complete(tbl); |
| 778 | spin_unlock(&tbl->slot_tbl_lock); |
| 779 | } |
| 780 | |
| 781 | static void nfs4_cb_free_slot(struct cb_process_state *cps) |
| 782 | { |
| 783 | if (cps->slot) { |
| 784 | nfs4_callback_free_slot(cps->clp->cl_session, cps->slot); |
| 785 | cps->slot = NULL; |
| 786 | } |
| 787 | } |
| 788 | |
| 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 | |
| 797 | static void nfs4_cb_free_slot(struct cb_process_state *cps) |
| 798 | { |
| 799 | } |
| 800 | #endif /* CONFIG_NFS_V4_1 */ |
| 801 | |
| 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 | |
| 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 | |
| 837 | static __be32 process_op(int nop, struct svc_rqst *rqstp, |
| 838 | struct xdr_stream *xdr_in, void *argp, |
| 839 | struct xdr_stream *xdr_out, void *resp, |
| 840 | struct cb_process_state *cps) |
| 841 | { |
| 842 | struct callback_op *op = &callback_ops[0]; |
| 843 | unsigned int op_nr; |
| 844 | __be32 status; |
| 845 | long maxlen; |
| 846 | __be32 res; |
| 847 | |
| 848 | dprintk("%s: start\n", __func__); |
| 849 | status = decode_op_hdr(xdr_in, &op_nr); |
| 850 | if (unlikely(status)) |
| 851 | return status; |
| 852 | |
| 853 | dprintk("%s: minorversion=%d nop=%d op_nr=%u\n", |
| 854 | __func__, cps->minorversion, nop, op_nr); |
| 855 | |
| 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 | } |
| 869 | |
| 870 | if (status == htonl(NFS4ERR_OP_ILLEGAL)) |
| 871 | op_nr = OP_CB_ILLEGAL; |
| 872 | if (status) |
| 873 | goto encode_hdr; |
| 874 | |
| 875 | if (cps->drc_status) { |
| 876 | status = cps->drc_status; |
| 877 | goto encode_hdr; |
| 878 | } |
| 879 | |
| 880 | maxlen = xdr_out->end - xdr_out->p; |
| 881 | if (maxlen > 0 && maxlen < PAGE_SIZE) { |
| 882 | status = op->decode_args(rqstp, xdr_in, argp); |
| 883 | if (likely(status == 0)) |
| 884 | status = op->process_op(argp, resp, cps); |
| 885 | } else |
| 886 | status = htonl(NFS4ERR_RESOURCE); |
| 887 | |
| 888 | encode_hdr: |
| 889 | res = encode_op_hdr(xdr_out, op_nr, status); |
| 890 | if (unlikely(res)) |
| 891 | return res; |
| 892 | if (op->encode_res != NULL && status == 0) |
| 893 | status = op->encode_res(rqstp, xdr_out, resp); |
| 894 | dprintk("%s: done, status = %d\n", __func__, ntohl(status)); |
| 895 | return status; |
| 896 | } |
| 897 | |
| 898 | /* |
| 899 | * Decode, process and encode a COMPOUND |
| 900 | */ |
| 901 | static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *resp) |
| 902 | { |
| 903 | struct cb_compound_hdr_arg hdr_arg = { 0 }; |
| 904 | struct cb_compound_hdr_res hdr_res = { NULL }; |
| 905 | struct xdr_stream xdr_in, xdr_out; |
| 906 | __be32 *p, status; |
| 907 | struct cb_process_state cps = { |
| 908 | .drc_status = 0, |
| 909 | .clp = NULL, |
| 910 | .net = SVC_NET(rqstp), |
| 911 | }; |
| 912 | unsigned int nops = 0; |
| 913 | |
| 914 | dprintk("%s: start\n", __func__); |
| 915 | |
| 916 | xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base); |
| 917 | |
| 918 | p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len); |
| 919 | xdr_init_encode(&xdr_out, &rqstp->rq_res, p); |
| 920 | |
| 921 | status = decode_compound_hdr_arg(&xdr_in, &hdr_arg); |
| 922 | if (status == htonl(NFS4ERR_RESOURCE)) |
| 923 | return rpc_garbage_args; |
| 924 | |
| 925 | if (hdr_arg.minorversion == 0) { |
| 926 | cps.clp = nfs4_find_client_ident(SVC_NET(rqstp), hdr_arg.cb_ident); |
| 927 | if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp)) |
| 928 | goto out_invalidcred; |
| 929 | } |
| 930 | |
| 931 | cps.minorversion = hdr_arg.minorversion; |
| 932 | hdr_res.taglen = hdr_arg.taglen; |
| 933 | hdr_res.tag = hdr_arg.tag; |
| 934 | if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0) |
| 935 | return rpc_system_err; |
| 936 | |
| 937 | while (status == 0 && nops != hdr_arg.nops) { |
| 938 | status = process_op(nops, rqstp, &xdr_in, |
| 939 | argp, &xdr_out, resp, &cps); |
| 940 | nops++; |
| 941 | } |
| 942 | |
| 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 | |
| 950 | *hdr_res.status = status; |
| 951 | *hdr_res.nops = htonl(nops); |
| 952 | nfs4_cb_free_slot(&cps); |
| 953 | nfs_put_client(cps.clp); |
| 954 | dprintk("%s: done, status = %u\n", __func__, ntohl(status)); |
| 955 | return rpc_success; |
| 956 | |
| 957 | out_invalidcred: |
| 958 | pr_warn_ratelimited("NFS: NFSv4 callback contains invalid cred\n"); |
| 959 | return rpc_autherr_badcred; |
| 960 | } |
| 961 | |
| 962 | /* |
| 963 | * Define NFS4 callback COMPOUND ops. |
| 964 | */ |
| 965 | static struct callback_op callback_ops[] = { |
| 966 | [0] = { |
| 967 | .res_maxsize = CB_OP_HDR_RES_MAXSZ, |
| 968 | }, |
| 969 | [OP_CB_GETATTR] = { |
| 970 | .process_op = (callback_process_op_t)nfs4_callback_getattr, |
| 971 | .decode_args = (callback_decode_arg_t)decode_getattr_args, |
| 972 | .encode_res = (callback_encode_res_t)encode_getattr_res, |
| 973 | .res_maxsize = CB_OP_GETATTR_RES_MAXSZ, |
| 974 | }, |
| 975 | [OP_CB_RECALL] = { |
| 976 | .process_op = (callback_process_op_t)nfs4_callback_recall, |
| 977 | .decode_args = (callback_decode_arg_t)decode_recall_args, |
| 978 | .res_maxsize = CB_OP_RECALL_RES_MAXSZ, |
| 979 | }, |
| 980 | #if defined(CONFIG_NFS_V4_1) |
| 981 | [OP_CB_LAYOUTRECALL] = { |
| 982 | .process_op = (callback_process_op_t)nfs4_callback_layoutrecall, |
| 983 | .decode_args = |
| 984 | (callback_decode_arg_t)decode_layoutrecall_args, |
| 985 | .res_maxsize = CB_OP_LAYOUTRECALL_RES_MAXSZ, |
| 986 | }, |
| 987 | [OP_CB_NOTIFY_DEVICEID] = { |
| 988 | .process_op = (callback_process_op_t)nfs4_callback_devicenotify, |
| 989 | .decode_args = |
| 990 | (callback_decode_arg_t)decode_devicenotify_args, |
| 991 | .res_maxsize = CB_OP_DEVICENOTIFY_RES_MAXSZ, |
| 992 | }, |
| 993 | [OP_CB_SEQUENCE] = { |
| 994 | .process_op = (callback_process_op_t)nfs4_callback_sequence, |
| 995 | .decode_args = (callback_decode_arg_t)decode_cb_sequence_args, |
| 996 | .encode_res = (callback_encode_res_t)encode_cb_sequence_res, |
| 997 | .res_maxsize = CB_OP_SEQUENCE_RES_MAXSZ, |
| 998 | }, |
| 999 | [OP_CB_RECALL_ANY] = { |
| 1000 | .process_op = (callback_process_op_t)nfs4_callback_recallany, |
| 1001 | .decode_args = (callback_decode_arg_t)decode_recallany_args, |
| 1002 | .res_maxsize = CB_OP_RECALLANY_RES_MAXSZ, |
| 1003 | }, |
| 1004 | [OP_CB_RECALL_SLOT] = { |
| 1005 | .process_op = (callback_process_op_t)nfs4_callback_recallslot, |
| 1006 | .decode_args = (callback_decode_arg_t)decode_recallslot_args, |
| 1007 | .res_maxsize = CB_OP_RECALLSLOT_RES_MAXSZ, |
| 1008 | }, |
| 1009 | #endif /* CONFIG_NFS_V4_1 */ |
| 1010 | }; |
| 1011 | |
| 1012 | /* |
| 1013 | * Define NFS4 callback procedures |
| 1014 | */ |
| 1015 | static struct svc_procedure nfs4_callback_procedures1[] = { |
| 1016 | [CB_NULL] = { |
| 1017 | .pc_func = nfs4_callback_null, |
| 1018 | .pc_decode = (kxdrproc_t)nfs4_decode_void, |
| 1019 | .pc_encode = (kxdrproc_t)nfs4_encode_void, |
| 1020 | .pc_xdrressize = 1, |
| 1021 | }, |
| 1022 | [CB_COMPOUND] = { |
| 1023 | .pc_func = nfs4_callback_compound, |
| 1024 | .pc_encode = (kxdrproc_t)nfs4_encode_void, |
| 1025 | .pc_argsize = 256, |
| 1026 | .pc_ressize = 256, |
| 1027 | .pc_xdrressize = NFS4_CALLBACK_BUFSIZE, |
| 1028 | } |
| 1029 | }; |
| 1030 | |
| 1031 | struct svc_version nfs4_callback_version1 = { |
| 1032 | .vs_vers = 1, |
| 1033 | .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), |
| 1034 | .vs_proc = nfs4_callback_procedures1, |
| 1035 | .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, |
| 1036 | .vs_dispatch = NULL, |
| 1037 | .vs_hidden = 1, |
| 1038 | }; |
| 1039 | |
| 1040 | struct svc_version nfs4_callback_version4 = { |
| 1041 | .vs_vers = 4, |
| 1042 | .vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1), |
| 1043 | .vs_proc = nfs4_callback_procedures1, |
| 1044 | .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, |
| 1045 | .vs_dispatch = NULL, |
| 1046 | .vs_hidden = 1, |
| 1047 | }; |