| 1 | /* |
| 2 | * Server-side XDR for NFSv4 |
| 3 | * |
| 4 | * Copyright (c) 2002 The Regents of the University of Michigan. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Kendrick Smith <kmsmith@umich.edu> |
| 8 | * Andy Adamson <andros@umich.edu> |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer. |
| 16 | * 2. Redistributions in binary form must reproduce the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer in the |
| 18 | * documentation and/or other materials provided with the distribution. |
| 19 | * 3. Neither the name of the University nor the names of its |
| 20 | * contributors may be used to endorse or promote products derived |
| 21 | * from this software without specific prior written permission. |
| 22 | * |
| 23 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 24 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 26 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 31 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 32 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 33 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 34 | */ |
| 35 | |
| 36 | #include <linux/file.h> |
| 37 | #include <linux/slab.h> |
| 38 | #include <linux/namei.h> |
| 39 | #include <linux/statfs.h> |
| 40 | #include <linux/utsname.h> |
| 41 | #include <linux/pagemap.h> |
| 42 | #include <linux/sunrpc/svcauth_gss.h> |
| 43 | #include <linux/sunrpc/addr.h> |
| 44 | #include <linux/xattr.h> |
| 45 | #include <linux/vmalloc.h> |
| 46 | |
| 47 | #include <uapi/linux/xattr.h> |
| 48 | |
| 49 | #include "idmap.h" |
| 50 | #include "acl.h" |
| 51 | #include "xdr4.h" |
| 52 | #include "vfs.h" |
| 53 | #include "state.h" |
| 54 | #include "cache.h" |
| 55 | #include "netns.h" |
| 56 | #include "pnfs.h" |
| 57 | #include "filecache.h" |
| 58 | |
| 59 | #include "trace.h" |
| 60 | |
| 61 | #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
| 62 | #include <linux/security.h> |
| 63 | #endif |
| 64 | |
| 65 | |
| 66 | #define NFSDDBG_FACILITY NFSDDBG_XDR |
| 67 | |
| 68 | const u32 nfsd_suppattrs[3][3] = { |
| 69 | {NFSD4_SUPPORTED_ATTRS_WORD0, |
| 70 | NFSD4_SUPPORTED_ATTRS_WORD1, |
| 71 | NFSD4_SUPPORTED_ATTRS_WORD2}, |
| 72 | |
| 73 | {NFSD4_1_SUPPORTED_ATTRS_WORD0, |
| 74 | NFSD4_1_SUPPORTED_ATTRS_WORD1, |
| 75 | NFSD4_1_SUPPORTED_ATTRS_WORD2}, |
| 76 | |
| 77 | {NFSD4_1_SUPPORTED_ATTRS_WORD0, |
| 78 | NFSD4_1_SUPPORTED_ATTRS_WORD1, |
| 79 | NFSD4_2_SUPPORTED_ATTRS_WORD2}, |
| 80 | }; |
| 81 | |
| 82 | /* |
| 83 | * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing |
| 84 | * directory in order to indicate to the client that a filesystem boundary is present |
| 85 | * We use a fixed fsid for a referral |
| 86 | */ |
| 87 | #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL |
| 88 | #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL |
| 89 | |
| 90 | static __be32 |
| 91 | check_filename(char *str, int len) |
| 92 | { |
| 93 | int i; |
| 94 | |
| 95 | if (len == 0) |
| 96 | return nfserr_inval; |
| 97 | if (len > NFS4_MAXNAMLEN) |
| 98 | return nfserr_nametoolong; |
| 99 | if (isdotent(str, len)) |
| 100 | return nfserr_badname; |
| 101 | for (i = 0; i < len; i++) |
| 102 | if (str[i] == '/') |
| 103 | return nfserr_badname; |
| 104 | return 0; |
| 105 | } |
| 106 | |
| 107 | static int zero_clientid(clientid_t *clid) |
| 108 | { |
| 109 | return (clid->cl_boot == 0) && (clid->cl_id == 0); |
| 110 | } |
| 111 | |
| 112 | /** |
| 113 | * svcxdr_tmpalloc - allocate memory to be freed after compound processing |
| 114 | * @argp: NFSv4 compound argument structure |
| 115 | * @len: length of buffer to allocate |
| 116 | * |
| 117 | * Allocates a buffer of size @len to be freed when processing the compound |
| 118 | * operation described in @argp finishes. |
| 119 | */ |
| 120 | static void * |
| 121 | svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len) |
| 122 | { |
| 123 | struct svcxdr_tmpbuf *tb; |
| 124 | |
| 125 | tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL); |
| 126 | if (!tb) |
| 127 | return NULL; |
| 128 | tb->next = argp->to_free; |
| 129 | argp->to_free = tb; |
| 130 | return tb->buf; |
| 131 | } |
| 132 | |
| 133 | /* |
| 134 | * For xdr strings that need to be passed to other kernel api's |
| 135 | * as null-terminated strings. |
| 136 | * |
| 137 | * Note null-terminating in place usually isn't safe since the |
| 138 | * buffer might end on a page boundary. |
| 139 | */ |
| 140 | static char * |
| 141 | svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len) |
| 142 | { |
| 143 | char *p = svcxdr_tmpalloc(argp, len + 1); |
| 144 | |
| 145 | if (!p) |
| 146 | return NULL; |
| 147 | memcpy(p, buf, len); |
| 148 | p[len] = '\0'; |
| 149 | return p; |
| 150 | } |
| 151 | |
| 152 | static void * |
| 153 | svcxdr_savemem(struct nfsd4_compoundargs *argp, __be32 *p, u32 len) |
| 154 | { |
| 155 | __be32 *tmp; |
| 156 | |
| 157 | /* |
| 158 | * The location of the decoded data item is stable, |
| 159 | * so @p is OK to use. This is the common case. |
| 160 | */ |
| 161 | if (p != argp->xdr->scratch.iov_base) |
| 162 | return p; |
| 163 | |
| 164 | tmp = svcxdr_tmpalloc(argp, len); |
| 165 | if (!tmp) |
| 166 | return NULL; |
| 167 | memcpy(tmp, p, len); |
| 168 | return tmp; |
| 169 | } |
| 170 | |
| 171 | /* |
| 172 | * NFSv4 basic data type decoders |
| 173 | */ |
| 174 | |
| 175 | /* |
| 176 | * This helper handles variable-length opaques which belong to protocol |
| 177 | * elements that this implementation does not support. |
| 178 | */ |
| 179 | static __be32 |
| 180 | nfsd4_decode_ignored_string(struct nfsd4_compoundargs *argp, u32 maxlen) |
| 181 | { |
| 182 | u32 len; |
| 183 | |
| 184 | if (xdr_stream_decode_u32(argp->xdr, &len) < 0) |
| 185 | return nfserr_bad_xdr; |
| 186 | if (maxlen && len > maxlen) |
| 187 | return nfserr_bad_xdr; |
| 188 | if (!xdr_inline_decode(argp->xdr, len)) |
| 189 | return nfserr_bad_xdr; |
| 190 | |
| 191 | return nfs_ok; |
| 192 | } |
| 193 | |
| 194 | static __be32 |
| 195 | nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o) |
| 196 | { |
| 197 | __be32 *p; |
| 198 | u32 len; |
| 199 | |
| 200 | if (xdr_stream_decode_u32(argp->xdr, &len) < 0) |
| 201 | return nfserr_bad_xdr; |
| 202 | if (len == 0 || len > NFS4_OPAQUE_LIMIT) |
| 203 | return nfserr_bad_xdr; |
| 204 | p = xdr_inline_decode(argp->xdr, len); |
| 205 | if (!p) |
| 206 | return nfserr_bad_xdr; |
| 207 | o->data = svcxdr_savemem(argp, p, len); |
| 208 | if (!o->data) |
| 209 | return nfserr_jukebox; |
| 210 | o->len = len; |
| 211 | |
| 212 | return nfs_ok; |
| 213 | } |
| 214 | |
| 215 | static __be32 |
| 216 | nfsd4_decode_component4(struct nfsd4_compoundargs *argp, char **namp, u32 *lenp) |
| 217 | { |
| 218 | __be32 *p, status; |
| 219 | |
| 220 | if (xdr_stream_decode_u32(argp->xdr, lenp) < 0) |
| 221 | return nfserr_bad_xdr; |
| 222 | p = xdr_inline_decode(argp->xdr, *lenp); |
| 223 | if (!p) |
| 224 | return nfserr_bad_xdr; |
| 225 | status = check_filename((char *)p, *lenp); |
| 226 | if (status) |
| 227 | return status; |
| 228 | *namp = svcxdr_savemem(argp, p, *lenp); |
| 229 | if (!*namp) |
| 230 | return nfserr_jukebox; |
| 231 | |
| 232 | return nfs_ok; |
| 233 | } |
| 234 | |
| 235 | static __be32 |
| 236 | nfsd4_decode_nfstime4(struct nfsd4_compoundargs *argp, struct timespec64 *tv) |
| 237 | { |
| 238 | __be32 *p; |
| 239 | |
| 240 | p = xdr_inline_decode(argp->xdr, XDR_UNIT * 3); |
| 241 | if (!p) |
| 242 | return nfserr_bad_xdr; |
| 243 | p = xdr_decode_hyper(p, &tv->tv_sec); |
| 244 | tv->tv_nsec = be32_to_cpup(p++); |
| 245 | if (tv->tv_nsec >= (u32)1000000000) |
| 246 | return nfserr_inval; |
| 247 | return nfs_ok; |
| 248 | } |
| 249 | |
| 250 | static __be32 |
| 251 | nfsd4_decode_verifier4(struct nfsd4_compoundargs *argp, nfs4_verifier *verf) |
| 252 | { |
| 253 | __be32 *p; |
| 254 | |
| 255 | p = xdr_inline_decode(argp->xdr, NFS4_VERIFIER_SIZE); |
| 256 | if (!p) |
| 257 | return nfserr_bad_xdr; |
| 258 | memcpy(verf->data, p, sizeof(verf->data)); |
| 259 | return nfs_ok; |
| 260 | } |
| 261 | |
| 262 | /** |
| 263 | * nfsd4_decode_bitmap4 - Decode an NFSv4 bitmap4 |
| 264 | * @argp: NFSv4 compound argument structure |
| 265 | * @bmval: pointer to an array of u32's to decode into |
| 266 | * @bmlen: size of the @bmval array |
| 267 | * |
| 268 | * The server needs to return nfs_ok rather than nfserr_bad_xdr when |
| 269 | * encountering bitmaps containing bits it does not recognize. This |
| 270 | * includes bits in bitmap words past WORDn, where WORDn is the last |
| 271 | * bitmap WORD the implementation currently supports. Thus we are |
| 272 | * careful here to simply ignore bits in bitmap words that this |
| 273 | * implementation has yet to support explicitly. |
| 274 | * |
| 275 | * Return values: |
| 276 | * %nfs_ok: @bmval populated successfully |
| 277 | * %nfserr_bad_xdr: the encoded bitmap was invalid |
| 278 | */ |
| 279 | static __be32 |
| 280 | nfsd4_decode_bitmap4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen) |
| 281 | { |
| 282 | ssize_t status; |
| 283 | |
| 284 | status = xdr_stream_decode_uint32_array(argp->xdr, bmval, bmlen); |
| 285 | return status == -EBADMSG ? nfserr_bad_xdr : nfs_ok; |
| 286 | } |
| 287 | |
| 288 | static __be32 |
| 289 | nfsd4_decode_nfsace4(struct nfsd4_compoundargs *argp, struct nfs4_ace *ace) |
| 290 | { |
| 291 | __be32 *p, status; |
| 292 | u32 length; |
| 293 | |
| 294 | if (xdr_stream_decode_u32(argp->xdr, &ace->type) < 0) |
| 295 | return nfserr_bad_xdr; |
| 296 | if (xdr_stream_decode_u32(argp->xdr, &ace->flag) < 0) |
| 297 | return nfserr_bad_xdr; |
| 298 | if (xdr_stream_decode_u32(argp->xdr, &ace->access_mask) < 0) |
| 299 | return nfserr_bad_xdr; |
| 300 | |
| 301 | if (xdr_stream_decode_u32(argp->xdr, &length) < 0) |
| 302 | return nfserr_bad_xdr; |
| 303 | p = xdr_inline_decode(argp->xdr, length); |
| 304 | if (!p) |
| 305 | return nfserr_bad_xdr; |
| 306 | ace->whotype = nfs4_acl_get_whotype((char *)p, length); |
| 307 | if (ace->whotype != NFS4_ACL_WHO_NAMED) |
| 308 | status = nfs_ok; |
| 309 | else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) |
| 310 | status = nfsd_map_name_to_gid(argp->rqstp, |
| 311 | (char *)p, length, &ace->who_gid); |
| 312 | else |
| 313 | status = nfsd_map_name_to_uid(argp->rqstp, |
| 314 | (char *)p, length, &ace->who_uid); |
| 315 | |
| 316 | return status; |
| 317 | } |
| 318 | |
| 319 | /* A counted array of nfsace4's */ |
| 320 | static noinline __be32 |
| 321 | nfsd4_decode_acl(struct nfsd4_compoundargs *argp, struct nfs4_acl **acl) |
| 322 | { |
| 323 | struct nfs4_ace *ace; |
| 324 | __be32 status; |
| 325 | u32 count; |
| 326 | |
| 327 | if (xdr_stream_decode_u32(argp->xdr, &count) < 0) |
| 328 | return nfserr_bad_xdr; |
| 329 | |
| 330 | if (count > xdr_stream_remaining(argp->xdr) / 20) |
| 331 | /* |
| 332 | * Even with 4-byte names there wouldn't be |
| 333 | * space for that many aces; something fishy is |
| 334 | * going on: |
| 335 | */ |
| 336 | return nfserr_fbig; |
| 337 | |
| 338 | *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(count)); |
| 339 | if (*acl == NULL) |
| 340 | return nfserr_jukebox; |
| 341 | |
| 342 | (*acl)->naces = count; |
| 343 | for (ace = (*acl)->aces; ace < (*acl)->aces + count; ace++) { |
| 344 | status = nfsd4_decode_nfsace4(argp, ace); |
| 345 | if (status) |
| 346 | return status; |
| 347 | } |
| 348 | |
| 349 | return nfs_ok; |
| 350 | } |
| 351 | |
| 352 | static noinline __be32 |
| 353 | nfsd4_decode_security_label(struct nfsd4_compoundargs *argp, |
| 354 | struct xdr_netobj *label) |
| 355 | { |
| 356 | u32 lfs, pi, length; |
| 357 | __be32 *p; |
| 358 | |
| 359 | if (xdr_stream_decode_u32(argp->xdr, &lfs) < 0) |
| 360 | return nfserr_bad_xdr; |
| 361 | if (xdr_stream_decode_u32(argp->xdr, &pi) < 0) |
| 362 | return nfserr_bad_xdr; |
| 363 | |
| 364 | if (xdr_stream_decode_u32(argp->xdr, &length) < 0) |
| 365 | return nfserr_bad_xdr; |
| 366 | if (length > NFS4_MAXLABELLEN) |
| 367 | return nfserr_badlabel; |
| 368 | p = xdr_inline_decode(argp->xdr, length); |
| 369 | if (!p) |
| 370 | return nfserr_bad_xdr; |
| 371 | label->len = length; |
| 372 | label->data = svcxdr_dupstr(argp, p, length); |
| 373 | if (!label->data) |
| 374 | return nfserr_jukebox; |
| 375 | |
| 376 | return nfs_ok; |
| 377 | } |
| 378 | |
| 379 | static __be32 |
| 380 | nfsd4_decode_fattr4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen, |
| 381 | struct iattr *iattr, struct nfs4_acl **acl, |
| 382 | struct xdr_netobj *label, int *umask) |
| 383 | { |
| 384 | unsigned int starting_pos; |
| 385 | u32 attrlist4_count; |
| 386 | __be32 *p, status; |
| 387 | |
| 388 | iattr->ia_valid = 0; |
| 389 | status = nfsd4_decode_bitmap4(argp, bmval, bmlen); |
| 390 | if (status) |
| 391 | return nfserr_bad_xdr; |
| 392 | |
| 393 | if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 |
| 394 | || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 |
| 395 | || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) { |
| 396 | if (nfsd_attrs_supported(argp->minorversion, bmval)) |
| 397 | return nfserr_inval; |
| 398 | return nfserr_attrnotsupp; |
| 399 | } |
| 400 | |
| 401 | if (xdr_stream_decode_u32(argp->xdr, &attrlist4_count) < 0) |
| 402 | return nfserr_bad_xdr; |
| 403 | starting_pos = xdr_stream_pos(argp->xdr); |
| 404 | |
| 405 | if (bmval[0] & FATTR4_WORD0_SIZE) { |
| 406 | u64 size; |
| 407 | |
| 408 | if (xdr_stream_decode_u64(argp->xdr, &size) < 0) |
| 409 | return nfserr_bad_xdr; |
| 410 | iattr->ia_size = size; |
| 411 | iattr->ia_valid |= ATTR_SIZE; |
| 412 | } |
| 413 | if (bmval[0] & FATTR4_WORD0_ACL) { |
| 414 | status = nfsd4_decode_acl(argp, acl); |
| 415 | if (status) |
| 416 | return status; |
| 417 | } else |
| 418 | *acl = NULL; |
| 419 | if (bmval[1] & FATTR4_WORD1_MODE) { |
| 420 | u32 mode; |
| 421 | |
| 422 | if (xdr_stream_decode_u32(argp->xdr, &mode) < 0) |
| 423 | return nfserr_bad_xdr; |
| 424 | iattr->ia_mode = mode; |
| 425 | iattr->ia_mode &= (S_IFMT | S_IALLUGO); |
| 426 | iattr->ia_valid |= ATTR_MODE; |
| 427 | } |
| 428 | if (bmval[1] & FATTR4_WORD1_OWNER) { |
| 429 | u32 length; |
| 430 | |
| 431 | if (xdr_stream_decode_u32(argp->xdr, &length) < 0) |
| 432 | return nfserr_bad_xdr; |
| 433 | p = xdr_inline_decode(argp->xdr, length); |
| 434 | if (!p) |
| 435 | return nfserr_bad_xdr; |
| 436 | status = nfsd_map_name_to_uid(argp->rqstp, (char *)p, length, |
| 437 | &iattr->ia_uid); |
| 438 | if (status) |
| 439 | return status; |
| 440 | iattr->ia_valid |= ATTR_UID; |
| 441 | } |
| 442 | if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { |
| 443 | u32 length; |
| 444 | |
| 445 | if (xdr_stream_decode_u32(argp->xdr, &length) < 0) |
| 446 | return nfserr_bad_xdr; |
| 447 | p = xdr_inline_decode(argp->xdr, length); |
| 448 | if (!p) |
| 449 | return nfserr_bad_xdr; |
| 450 | status = nfsd_map_name_to_gid(argp->rqstp, (char *)p, length, |
| 451 | &iattr->ia_gid); |
| 452 | if (status) |
| 453 | return status; |
| 454 | iattr->ia_valid |= ATTR_GID; |
| 455 | } |
| 456 | if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { |
| 457 | u32 set_it; |
| 458 | |
| 459 | if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0) |
| 460 | return nfserr_bad_xdr; |
| 461 | switch (set_it) { |
| 462 | case NFS4_SET_TO_CLIENT_TIME: |
| 463 | status = nfsd4_decode_nfstime4(argp, &iattr->ia_atime); |
| 464 | if (status) |
| 465 | return status; |
| 466 | iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); |
| 467 | break; |
| 468 | case NFS4_SET_TO_SERVER_TIME: |
| 469 | iattr->ia_valid |= ATTR_ATIME; |
| 470 | break; |
| 471 | default: |
| 472 | return nfserr_bad_xdr; |
| 473 | } |
| 474 | } |
| 475 | if (bmval[1] & FATTR4_WORD1_TIME_CREATE) { |
| 476 | struct timespec64 ts; |
| 477 | |
| 478 | /* No Linux filesystem supports setting this attribute. */ |
| 479 | bmval[1] &= ~FATTR4_WORD1_TIME_CREATE; |
| 480 | status = nfsd4_decode_nfstime4(argp, &ts); |
| 481 | if (status) |
| 482 | return status; |
| 483 | } |
| 484 | if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { |
| 485 | u32 set_it; |
| 486 | |
| 487 | if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0) |
| 488 | return nfserr_bad_xdr; |
| 489 | switch (set_it) { |
| 490 | case NFS4_SET_TO_CLIENT_TIME: |
| 491 | status = nfsd4_decode_nfstime4(argp, &iattr->ia_mtime); |
| 492 | if (status) |
| 493 | return status; |
| 494 | iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); |
| 495 | break; |
| 496 | case NFS4_SET_TO_SERVER_TIME: |
| 497 | iattr->ia_valid |= ATTR_MTIME; |
| 498 | break; |
| 499 | default: |
| 500 | return nfserr_bad_xdr; |
| 501 | } |
| 502 | } |
| 503 | label->len = 0; |
| 504 | if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) && |
| 505 | bmval[2] & FATTR4_WORD2_SECURITY_LABEL) { |
| 506 | status = nfsd4_decode_security_label(argp, label); |
| 507 | if (status) |
| 508 | return status; |
| 509 | } |
| 510 | if (bmval[2] & FATTR4_WORD2_MODE_UMASK) { |
| 511 | u32 mode, mask; |
| 512 | |
| 513 | if (!umask) |
| 514 | return nfserr_bad_xdr; |
| 515 | if (xdr_stream_decode_u32(argp->xdr, &mode) < 0) |
| 516 | return nfserr_bad_xdr; |
| 517 | iattr->ia_mode = mode & (S_IFMT | S_IALLUGO); |
| 518 | if (xdr_stream_decode_u32(argp->xdr, &mask) < 0) |
| 519 | return nfserr_bad_xdr; |
| 520 | *umask = mask & S_IRWXUGO; |
| 521 | iattr->ia_valid |= ATTR_MODE; |
| 522 | } |
| 523 | |
| 524 | /* request sanity: did attrlist4 contain the expected number of words? */ |
| 525 | if (attrlist4_count != xdr_stream_pos(argp->xdr) - starting_pos) |
| 526 | return nfserr_bad_xdr; |
| 527 | |
| 528 | return nfs_ok; |
| 529 | } |
| 530 | |
| 531 | static __be32 |
| 532 | nfsd4_decode_stateid4(struct nfsd4_compoundargs *argp, stateid_t *sid) |
| 533 | { |
| 534 | __be32 *p; |
| 535 | |
| 536 | p = xdr_inline_decode(argp->xdr, NFS4_STATEID_SIZE); |
| 537 | if (!p) |
| 538 | return nfserr_bad_xdr; |
| 539 | sid->si_generation = be32_to_cpup(p++); |
| 540 | memcpy(&sid->si_opaque, p, sizeof(sid->si_opaque)); |
| 541 | return nfs_ok; |
| 542 | } |
| 543 | |
| 544 | static __be32 |
| 545 | nfsd4_decode_clientid4(struct nfsd4_compoundargs *argp, clientid_t *clientid) |
| 546 | { |
| 547 | __be32 *p; |
| 548 | |
| 549 | p = xdr_inline_decode(argp->xdr, sizeof(__be64)); |
| 550 | if (!p) |
| 551 | return nfserr_bad_xdr; |
| 552 | memcpy(clientid, p, sizeof(*clientid)); |
| 553 | return nfs_ok; |
| 554 | } |
| 555 | |
| 556 | static __be32 |
| 557 | nfsd4_decode_state_owner4(struct nfsd4_compoundargs *argp, |
| 558 | clientid_t *clientid, struct xdr_netobj *owner) |
| 559 | { |
| 560 | __be32 status; |
| 561 | |
| 562 | status = nfsd4_decode_clientid4(argp, clientid); |
| 563 | if (status) |
| 564 | return status; |
| 565 | return nfsd4_decode_opaque(argp, owner); |
| 566 | } |
| 567 | |
| 568 | #ifdef CONFIG_NFSD_PNFS |
| 569 | static __be32 |
| 570 | nfsd4_decode_deviceid4(struct nfsd4_compoundargs *argp, |
| 571 | struct nfsd4_deviceid *devid) |
| 572 | { |
| 573 | __be32 *p; |
| 574 | |
| 575 | p = xdr_inline_decode(argp->xdr, NFS4_DEVICEID4_SIZE); |
| 576 | if (!p) |
| 577 | return nfserr_bad_xdr; |
| 578 | memcpy(devid, p, sizeof(*devid)); |
| 579 | return nfs_ok; |
| 580 | } |
| 581 | |
| 582 | static __be32 |
| 583 | nfsd4_decode_layoutupdate4(struct nfsd4_compoundargs *argp, |
| 584 | struct nfsd4_layoutcommit *lcp) |
| 585 | { |
| 586 | if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_layout_type) < 0) |
| 587 | return nfserr_bad_xdr; |
| 588 | if (lcp->lc_layout_type < LAYOUT_NFSV4_1_FILES) |
| 589 | return nfserr_bad_xdr; |
| 590 | if (lcp->lc_layout_type >= LAYOUT_TYPE_MAX) |
| 591 | return nfserr_bad_xdr; |
| 592 | |
| 593 | if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_up_len) < 0) |
| 594 | return nfserr_bad_xdr; |
| 595 | if (lcp->lc_up_len > 0) { |
| 596 | lcp->lc_up_layout = xdr_inline_decode(argp->xdr, lcp->lc_up_len); |
| 597 | if (!lcp->lc_up_layout) |
| 598 | return nfserr_bad_xdr; |
| 599 | } |
| 600 | |
| 601 | return nfs_ok; |
| 602 | } |
| 603 | |
| 604 | static __be32 |
| 605 | nfsd4_decode_layoutreturn4(struct nfsd4_compoundargs *argp, |
| 606 | struct nfsd4_layoutreturn *lrp) |
| 607 | { |
| 608 | __be32 status; |
| 609 | |
| 610 | if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_return_type) < 0) |
| 611 | return nfserr_bad_xdr; |
| 612 | switch (lrp->lr_return_type) { |
| 613 | case RETURN_FILE: |
| 614 | if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.offset) < 0) |
| 615 | return nfserr_bad_xdr; |
| 616 | if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.length) < 0) |
| 617 | return nfserr_bad_xdr; |
| 618 | status = nfsd4_decode_stateid4(argp, &lrp->lr_sid); |
| 619 | if (status) |
| 620 | return status; |
| 621 | if (xdr_stream_decode_u32(argp->xdr, &lrp->lrf_body_len) < 0) |
| 622 | return nfserr_bad_xdr; |
| 623 | if (lrp->lrf_body_len > 0) { |
| 624 | lrp->lrf_body = xdr_inline_decode(argp->xdr, lrp->lrf_body_len); |
| 625 | if (!lrp->lrf_body) |
| 626 | return nfserr_bad_xdr; |
| 627 | } |
| 628 | break; |
| 629 | case RETURN_FSID: |
| 630 | case RETURN_ALL: |
| 631 | lrp->lr_seg.offset = 0; |
| 632 | lrp->lr_seg.length = NFS4_MAX_UINT64; |
| 633 | break; |
| 634 | default: |
| 635 | return nfserr_bad_xdr; |
| 636 | } |
| 637 | |
| 638 | return nfs_ok; |
| 639 | } |
| 640 | |
| 641 | #endif /* CONFIG_NFSD_PNFS */ |
| 642 | |
| 643 | static __be32 |
| 644 | nfsd4_decode_sessionid4(struct nfsd4_compoundargs *argp, |
| 645 | struct nfs4_sessionid *sessionid) |
| 646 | { |
| 647 | __be32 *p; |
| 648 | |
| 649 | p = xdr_inline_decode(argp->xdr, NFS4_MAX_SESSIONID_LEN); |
| 650 | if (!p) |
| 651 | return nfserr_bad_xdr; |
| 652 | memcpy(sessionid->data, p, sizeof(sessionid->data)); |
| 653 | return nfs_ok; |
| 654 | } |
| 655 | |
| 656 | /* Defined in Appendix A of RFC 5531 */ |
| 657 | static __be32 |
| 658 | nfsd4_decode_authsys_parms(struct nfsd4_compoundargs *argp, |
| 659 | struct nfsd4_cb_sec *cbs) |
| 660 | { |
| 661 | u32 stamp, gidcount, uid, gid; |
| 662 | __be32 *p, status; |
| 663 | |
| 664 | if (xdr_stream_decode_u32(argp->xdr, &stamp) < 0) |
| 665 | return nfserr_bad_xdr; |
| 666 | /* machine name */ |
| 667 | status = nfsd4_decode_ignored_string(argp, 255); |
| 668 | if (status) |
| 669 | return status; |
| 670 | if (xdr_stream_decode_u32(argp->xdr, &uid) < 0) |
| 671 | return nfserr_bad_xdr; |
| 672 | if (xdr_stream_decode_u32(argp->xdr, &gid) < 0) |
| 673 | return nfserr_bad_xdr; |
| 674 | if (xdr_stream_decode_u32(argp->xdr, &gidcount) < 0) |
| 675 | return nfserr_bad_xdr; |
| 676 | if (gidcount > 16) |
| 677 | return nfserr_bad_xdr; |
| 678 | p = xdr_inline_decode(argp->xdr, gidcount << 2); |
| 679 | if (!p) |
| 680 | return nfserr_bad_xdr; |
| 681 | if (cbs->flavor == (u32)(-1)) { |
| 682 | struct user_namespace *userns = nfsd_user_namespace(argp->rqstp); |
| 683 | |
| 684 | kuid_t kuid = make_kuid(userns, uid); |
| 685 | kgid_t kgid = make_kgid(userns, gid); |
| 686 | if (uid_valid(kuid) && gid_valid(kgid)) { |
| 687 | cbs->uid = kuid; |
| 688 | cbs->gid = kgid; |
| 689 | cbs->flavor = RPC_AUTH_UNIX; |
| 690 | } else { |
| 691 | dprintk("RPC_AUTH_UNIX with invalid uid or gid, ignoring!\n"); |
| 692 | } |
| 693 | } |
| 694 | |
| 695 | return nfs_ok; |
| 696 | } |
| 697 | |
| 698 | static __be32 |
| 699 | nfsd4_decode_gss_cb_handles4(struct nfsd4_compoundargs *argp, |
| 700 | struct nfsd4_cb_sec *cbs) |
| 701 | { |
| 702 | __be32 status; |
| 703 | u32 service; |
| 704 | |
| 705 | dprintk("RPC_AUTH_GSS callback secflavor not supported!\n"); |
| 706 | |
| 707 | if (xdr_stream_decode_u32(argp->xdr, &service) < 0) |
| 708 | return nfserr_bad_xdr; |
| 709 | if (service < RPC_GSS_SVC_NONE || service > RPC_GSS_SVC_PRIVACY) |
| 710 | return nfserr_bad_xdr; |
| 711 | /* gcbp_handle_from_server */ |
| 712 | status = nfsd4_decode_ignored_string(argp, 0); |
| 713 | if (status) |
| 714 | return status; |
| 715 | /* gcbp_handle_from_client */ |
| 716 | status = nfsd4_decode_ignored_string(argp, 0); |
| 717 | if (status) |
| 718 | return status; |
| 719 | |
| 720 | return nfs_ok; |
| 721 | } |
| 722 | |
| 723 | /* a counted array of callback_sec_parms4 items */ |
| 724 | static __be32 |
| 725 | nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs) |
| 726 | { |
| 727 | u32 i, secflavor, nr_secflavs; |
| 728 | __be32 status; |
| 729 | |
| 730 | /* callback_sec_params4 */ |
| 731 | if (xdr_stream_decode_u32(argp->xdr, &nr_secflavs) < 0) |
| 732 | return nfserr_bad_xdr; |
| 733 | if (nr_secflavs) |
| 734 | cbs->flavor = (u32)(-1); |
| 735 | else |
| 736 | /* Is this legal? Be generous, take it to mean AUTH_NONE: */ |
| 737 | cbs->flavor = 0; |
| 738 | |
| 739 | for (i = 0; i < nr_secflavs; ++i) { |
| 740 | if (xdr_stream_decode_u32(argp->xdr, &secflavor) < 0) |
| 741 | return nfserr_bad_xdr; |
| 742 | switch (secflavor) { |
| 743 | case RPC_AUTH_NULL: |
| 744 | /* void */ |
| 745 | if (cbs->flavor == (u32)(-1)) |
| 746 | cbs->flavor = RPC_AUTH_NULL; |
| 747 | break; |
| 748 | case RPC_AUTH_UNIX: |
| 749 | status = nfsd4_decode_authsys_parms(argp, cbs); |
| 750 | if (status) |
| 751 | return status; |
| 752 | break; |
| 753 | case RPC_AUTH_GSS: |
| 754 | status = nfsd4_decode_gss_cb_handles4(argp, cbs); |
| 755 | if (status) |
| 756 | return status; |
| 757 | break; |
| 758 | default: |
| 759 | return nfserr_inval; |
| 760 | } |
| 761 | } |
| 762 | |
| 763 | return nfs_ok; |
| 764 | } |
| 765 | |
| 766 | |
| 767 | /* |
| 768 | * NFSv4 operation argument decoders |
| 769 | */ |
| 770 | |
| 771 | static __be32 |
| 772 | nfsd4_decode_access(struct nfsd4_compoundargs *argp, |
| 773 | union nfsd4_op_u *u) |
| 774 | { |
| 775 | struct nfsd4_access *access = &u->access; |
| 776 | if (xdr_stream_decode_u32(argp->xdr, &access->ac_req_access) < 0) |
| 777 | return nfserr_bad_xdr; |
| 778 | return nfs_ok; |
| 779 | } |
| 780 | |
| 781 | static __be32 |
| 782 | nfsd4_decode_close(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 783 | { |
| 784 | struct nfsd4_close *close = &u->close; |
| 785 | if (xdr_stream_decode_u32(argp->xdr, &close->cl_seqid) < 0) |
| 786 | return nfserr_bad_xdr; |
| 787 | return nfsd4_decode_stateid4(argp, &close->cl_stateid); |
| 788 | } |
| 789 | |
| 790 | |
| 791 | static __be32 |
| 792 | nfsd4_decode_commit(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 793 | { |
| 794 | struct nfsd4_commit *commit = &u->commit; |
| 795 | if (xdr_stream_decode_u64(argp->xdr, &commit->co_offset) < 0) |
| 796 | return nfserr_bad_xdr; |
| 797 | if (xdr_stream_decode_u32(argp->xdr, &commit->co_count) < 0) |
| 798 | return nfserr_bad_xdr; |
| 799 | memset(&commit->co_verf, 0, sizeof(commit->co_verf)); |
| 800 | return nfs_ok; |
| 801 | } |
| 802 | |
| 803 | static __be32 |
| 804 | nfsd4_decode_create(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 805 | { |
| 806 | struct nfsd4_create *create = &u->create; |
| 807 | __be32 *p, status; |
| 808 | |
| 809 | memset(create, 0, sizeof(*create)); |
| 810 | if (xdr_stream_decode_u32(argp->xdr, &create->cr_type) < 0) |
| 811 | return nfserr_bad_xdr; |
| 812 | switch (create->cr_type) { |
| 813 | case NF4LNK: |
| 814 | if (xdr_stream_decode_u32(argp->xdr, &create->cr_datalen) < 0) |
| 815 | return nfserr_bad_xdr; |
| 816 | p = xdr_inline_decode(argp->xdr, create->cr_datalen); |
| 817 | if (!p) |
| 818 | return nfserr_bad_xdr; |
| 819 | create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen); |
| 820 | if (!create->cr_data) |
| 821 | return nfserr_jukebox; |
| 822 | break; |
| 823 | case NF4BLK: |
| 824 | case NF4CHR: |
| 825 | if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata1) < 0) |
| 826 | return nfserr_bad_xdr; |
| 827 | if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata2) < 0) |
| 828 | return nfserr_bad_xdr; |
| 829 | break; |
| 830 | case NF4SOCK: |
| 831 | case NF4FIFO: |
| 832 | case NF4DIR: |
| 833 | default: |
| 834 | break; |
| 835 | } |
| 836 | status = nfsd4_decode_component4(argp, &create->cr_name, |
| 837 | &create->cr_namelen); |
| 838 | if (status) |
| 839 | return status; |
| 840 | status = nfsd4_decode_fattr4(argp, create->cr_bmval, |
| 841 | ARRAY_SIZE(create->cr_bmval), |
| 842 | &create->cr_iattr, &create->cr_acl, |
| 843 | &create->cr_label, &create->cr_umask); |
| 844 | if (status) |
| 845 | return status; |
| 846 | |
| 847 | return nfs_ok; |
| 848 | } |
| 849 | |
| 850 | static inline __be32 |
| 851 | nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 852 | { |
| 853 | struct nfsd4_delegreturn *dr = &u->delegreturn; |
| 854 | return nfsd4_decode_stateid4(argp, &dr->dr_stateid); |
| 855 | } |
| 856 | |
| 857 | static inline __be32 |
| 858 | nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 859 | { |
| 860 | struct nfsd4_getattr *getattr = &u->getattr; |
| 861 | memset(getattr, 0, sizeof(*getattr)); |
| 862 | return nfsd4_decode_bitmap4(argp, getattr->ga_bmval, |
| 863 | ARRAY_SIZE(getattr->ga_bmval)); |
| 864 | } |
| 865 | |
| 866 | static __be32 |
| 867 | nfsd4_decode_link(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 868 | { |
| 869 | struct nfsd4_link *link = &u->link; |
| 870 | memset(link, 0, sizeof(*link)); |
| 871 | return nfsd4_decode_component4(argp, &link->li_name, &link->li_namelen); |
| 872 | } |
| 873 | |
| 874 | static __be32 |
| 875 | nfsd4_decode_open_to_lock_owner4(struct nfsd4_compoundargs *argp, |
| 876 | struct nfsd4_lock *lock) |
| 877 | { |
| 878 | __be32 status; |
| 879 | |
| 880 | if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_open_seqid) < 0) |
| 881 | return nfserr_bad_xdr; |
| 882 | status = nfsd4_decode_stateid4(argp, &lock->lk_new_open_stateid); |
| 883 | if (status) |
| 884 | return status; |
| 885 | if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_lock_seqid) < 0) |
| 886 | return nfserr_bad_xdr; |
| 887 | return nfsd4_decode_state_owner4(argp, &lock->lk_new_clientid, |
| 888 | &lock->lk_new_owner); |
| 889 | } |
| 890 | |
| 891 | static __be32 |
| 892 | nfsd4_decode_exist_lock_owner4(struct nfsd4_compoundargs *argp, |
| 893 | struct nfsd4_lock *lock) |
| 894 | { |
| 895 | __be32 status; |
| 896 | |
| 897 | status = nfsd4_decode_stateid4(argp, &lock->lk_old_lock_stateid); |
| 898 | if (status) |
| 899 | return status; |
| 900 | if (xdr_stream_decode_u32(argp->xdr, &lock->lk_old_lock_seqid) < 0) |
| 901 | return nfserr_bad_xdr; |
| 902 | |
| 903 | return nfs_ok; |
| 904 | } |
| 905 | |
| 906 | static __be32 |
| 907 | nfsd4_decode_locker4(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) |
| 908 | { |
| 909 | if (xdr_stream_decode_bool(argp->xdr, &lock->lk_is_new) < 0) |
| 910 | return nfserr_bad_xdr; |
| 911 | if (lock->lk_is_new) |
| 912 | return nfsd4_decode_open_to_lock_owner4(argp, lock); |
| 913 | return nfsd4_decode_exist_lock_owner4(argp, lock); |
| 914 | } |
| 915 | |
| 916 | static __be32 |
| 917 | nfsd4_decode_lock(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 918 | { |
| 919 | struct nfsd4_lock *lock = &u->lock; |
| 920 | memset(lock, 0, sizeof(*lock)); |
| 921 | if (xdr_stream_decode_u32(argp->xdr, &lock->lk_type) < 0) |
| 922 | return nfserr_bad_xdr; |
| 923 | if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) |
| 924 | return nfserr_bad_xdr; |
| 925 | if (xdr_stream_decode_bool(argp->xdr, &lock->lk_reclaim) < 0) |
| 926 | return nfserr_bad_xdr; |
| 927 | if (xdr_stream_decode_u64(argp->xdr, &lock->lk_offset) < 0) |
| 928 | return nfserr_bad_xdr; |
| 929 | if (xdr_stream_decode_u64(argp->xdr, &lock->lk_length) < 0) |
| 930 | return nfserr_bad_xdr; |
| 931 | return nfsd4_decode_locker4(argp, lock); |
| 932 | } |
| 933 | |
| 934 | static __be32 |
| 935 | nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 936 | { |
| 937 | struct nfsd4_lockt *lockt = &u->lockt; |
| 938 | memset(lockt, 0, sizeof(*lockt)); |
| 939 | if (xdr_stream_decode_u32(argp->xdr, &lockt->lt_type) < 0) |
| 940 | return nfserr_bad_xdr; |
| 941 | if ((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) |
| 942 | return nfserr_bad_xdr; |
| 943 | if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_offset) < 0) |
| 944 | return nfserr_bad_xdr; |
| 945 | if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_length) < 0) |
| 946 | return nfserr_bad_xdr; |
| 947 | return nfsd4_decode_state_owner4(argp, &lockt->lt_clientid, |
| 948 | &lockt->lt_owner); |
| 949 | } |
| 950 | |
| 951 | static __be32 |
| 952 | nfsd4_decode_locku(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 953 | { |
| 954 | struct nfsd4_locku *locku = &u->locku; |
| 955 | __be32 status; |
| 956 | |
| 957 | if (xdr_stream_decode_u32(argp->xdr, &locku->lu_type) < 0) |
| 958 | return nfserr_bad_xdr; |
| 959 | if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) |
| 960 | return nfserr_bad_xdr; |
| 961 | if (xdr_stream_decode_u32(argp->xdr, &locku->lu_seqid) < 0) |
| 962 | return nfserr_bad_xdr; |
| 963 | status = nfsd4_decode_stateid4(argp, &locku->lu_stateid); |
| 964 | if (status) |
| 965 | return status; |
| 966 | if (xdr_stream_decode_u64(argp->xdr, &locku->lu_offset) < 0) |
| 967 | return nfserr_bad_xdr; |
| 968 | if (xdr_stream_decode_u64(argp->xdr, &locku->lu_length) < 0) |
| 969 | return nfserr_bad_xdr; |
| 970 | |
| 971 | return nfs_ok; |
| 972 | } |
| 973 | |
| 974 | static __be32 |
| 975 | nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 976 | { |
| 977 | struct nfsd4_lookup *lookup = &u->lookup; |
| 978 | return nfsd4_decode_component4(argp, &lookup->lo_name, &lookup->lo_len); |
| 979 | } |
| 980 | |
| 981 | static __be32 |
| 982 | nfsd4_decode_createhow4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) |
| 983 | { |
| 984 | __be32 status; |
| 985 | |
| 986 | if (xdr_stream_decode_u32(argp->xdr, &open->op_createmode) < 0) |
| 987 | return nfserr_bad_xdr; |
| 988 | switch (open->op_createmode) { |
| 989 | case NFS4_CREATE_UNCHECKED: |
| 990 | case NFS4_CREATE_GUARDED: |
| 991 | status = nfsd4_decode_fattr4(argp, open->op_bmval, |
| 992 | ARRAY_SIZE(open->op_bmval), |
| 993 | &open->op_iattr, &open->op_acl, |
| 994 | &open->op_label, &open->op_umask); |
| 995 | if (status) |
| 996 | return status; |
| 997 | break; |
| 998 | case NFS4_CREATE_EXCLUSIVE: |
| 999 | status = nfsd4_decode_verifier4(argp, &open->op_verf); |
| 1000 | if (status) |
| 1001 | return status; |
| 1002 | break; |
| 1003 | case NFS4_CREATE_EXCLUSIVE4_1: |
| 1004 | if (argp->minorversion < 1) |
| 1005 | return nfserr_bad_xdr; |
| 1006 | status = nfsd4_decode_verifier4(argp, &open->op_verf); |
| 1007 | if (status) |
| 1008 | return status; |
| 1009 | status = nfsd4_decode_fattr4(argp, open->op_bmval, |
| 1010 | ARRAY_SIZE(open->op_bmval), |
| 1011 | &open->op_iattr, &open->op_acl, |
| 1012 | &open->op_label, &open->op_umask); |
| 1013 | if (status) |
| 1014 | return status; |
| 1015 | break; |
| 1016 | default: |
| 1017 | return nfserr_bad_xdr; |
| 1018 | } |
| 1019 | |
| 1020 | return nfs_ok; |
| 1021 | } |
| 1022 | |
| 1023 | static __be32 |
| 1024 | nfsd4_decode_openflag4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) |
| 1025 | { |
| 1026 | __be32 status; |
| 1027 | |
| 1028 | if (xdr_stream_decode_u32(argp->xdr, &open->op_create) < 0) |
| 1029 | return nfserr_bad_xdr; |
| 1030 | switch (open->op_create) { |
| 1031 | case NFS4_OPEN_NOCREATE: |
| 1032 | break; |
| 1033 | case NFS4_OPEN_CREATE: |
| 1034 | status = nfsd4_decode_createhow4(argp, open); |
| 1035 | if (status) |
| 1036 | return status; |
| 1037 | break; |
| 1038 | default: |
| 1039 | return nfserr_bad_xdr; |
| 1040 | } |
| 1041 | |
| 1042 | return nfs_ok; |
| 1043 | } |
| 1044 | |
| 1045 | static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when) |
| 1046 | { |
| 1047 | u32 w; |
| 1048 | |
| 1049 | if (xdr_stream_decode_u32(argp->xdr, &w) < 0) |
| 1050 | return nfserr_bad_xdr; |
| 1051 | *share_access = w & NFS4_SHARE_ACCESS_MASK; |
| 1052 | *deleg_want = w & NFS4_SHARE_WANT_MASK; |
| 1053 | if (deleg_when) |
| 1054 | *deleg_when = w & NFS4_SHARE_WHEN_MASK; |
| 1055 | |
| 1056 | switch (w & NFS4_SHARE_ACCESS_MASK) { |
| 1057 | case NFS4_SHARE_ACCESS_READ: |
| 1058 | case NFS4_SHARE_ACCESS_WRITE: |
| 1059 | case NFS4_SHARE_ACCESS_BOTH: |
| 1060 | break; |
| 1061 | default: |
| 1062 | return nfserr_bad_xdr; |
| 1063 | } |
| 1064 | w &= ~NFS4_SHARE_ACCESS_MASK; |
| 1065 | if (!w) |
| 1066 | return nfs_ok; |
| 1067 | if (!argp->minorversion) |
| 1068 | return nfserr_bad_xdr; |
| 1069 | switch (w & NFS4_SHARE_WANT_MASK) { |
| 1070 | case NFS4_SHARE_WANT_NO_PREFERENCE: |
| 1071 | case NFS4_SHARE_WANT_READ_DELEG: |
| 1072 | case NFS4_SHARE_WANT_WRITE_DELEG: |
| 1073 | case NFS4_SHARE_WANT_ANY_DELEG: |
| 1074 | case NFS4_SHARE_WANT_NO_DELEG: |
| 1075 | case NFS4_SHARE_WANT_CANCEL: |
| 1076 | break; |
| 1077 | default: |
| 1078 | return nfserr_bad_xdr; |
| 1079 | } |
| 1080 | w &= ~NFS4_SHARE_WANT_MASK; |
| 1081 | if (!w) |
| 1082 | return nfs_ok; |
| 1083 | |
| 1084 | if (!deleg_when) /* open_downgrade */ |
| 1085 | return nfserr_inval; |
| 1086 | switch (w) { |
| 1087 | case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL: |
| 1088 | case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED: |
| 1089 | case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL | |
| 1090 | NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED): |
| 1091 | return nfs_ok; |
| 1092 | } |
| 1093 | return nfserr_bad_xdr; |
| 1094 | } |
| 1095 | |
| 1096 | static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x) |
| 1097 | { |
| 1098 | if (xdr_stream_decode_u32(argp->xdr, x) < 0) |
| 1099 | return nfserr_bad_xdr; |
| 1100 | /* Note: unlike access bits, deny bits may be zero. */ |
| 1101 | if (*x & ~NFS4_SHARE_DENY_BOTH) |
| 1102 | return nfserr_bad_xdr; |
| 1103 | |
| 1104 | return nfs_ok; |
| 1105 | } |
| 1106 | |
| 1107 | static __be32 |
| 1108 | nfsd4_decode_open_claim4(struct nfsd4_compoundargs *argp, |
| 1109 | struct nfsd4_open *open) |
| 1110 | { |
| 1111 | __be32 status; |
| 1112 | |
| 1113 | if (xdr_stream_decode_u32(argp->xdr, &open->op_claim_type) < 0) |
| 1114 | return nfserr_bad_xdr; |
| 1115 | switch (open->op_claim_type) { |
| 1116 | case NFS4_OPEN_CLAIM_NULL: |
| 1117 | case NFS4_OPEN_CLAIM_DELEGATE_PREV: |
| 1118 | status = nfsd4_decode_component4(argp, &open->op_fname, |
| 1119 | &open->op_fnamelen); |
| 1120 | if (status) |
| 1121 | return status; |
| 1122 | break; |
| 1123 | case NFS4_OPEN_CLAIM_PREVIOUS: |
| 1124 | if (xdr_stream_decode_u32(argp->xdr, &open->op_delegate_type) < 0) |
| 1125 | return nfserr_bad_xdr; |
| 1126 | break; |
| 1127 | case NFS4_OPEN_CLAIM_DELEGATE_CUR: |
| 1128 | status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid); |
| 1129 | if (status) |
| 1130 | return status; |
| 1131 | status = nfsd4_decode_component4(argp, &open->op_fname, |
| 1132 | &open->op_fnamelen); |
| 1133 | if (status) |
| 1134 | return status; |
| 1135 | break; |
| 1136 | case NFS4_OPEN_CLAIM_FH: |
| 1137 | case NFS4_OPEN_CLAIM_DELEG_PREV_FH: |
| 1138 | if (argp->minorversion < 1) |
| 1139 | return nfserr_bad_xdr; |
| 1140 | /* void */ |
| 1141 | break; |
| 1142 | case NFS4_OPEN_CLAIM_DELEG_CUR_FH: |
| 1143 | if (argp->minorversion < 1) |
| 1144 | return nfserr_bad_xdr; |
| 1145 | status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid); |
| 1146 | if (status) |
| 1147 | return status; |
| 1148 | break; |
| 1149 | default: |
| 1150 | return nfserr_bad_xdr; |
| 1151 | } |
| 1152 | |
| 1153 | return nfs_ok; |
| 1154 | } |
| 1155 | |
| 1156 | static __be32 |
| 1157 | nfsd4_decode_open(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 1158 | { |
| 1159 | struct nfsd4_open *open = &u->open; |
| 1160 | __be32 status; |
| 1161 | u32 dummy; |
| 1162 | |
| 1163 | memset(open, 0, sizeof(*open)); |
| 1164 | |
| 1165 | if (xdr_stream_decode_u32(argp->xdr, &open->op_seqid) < 0) |
| 1166 | return nfserr_bad_xdr; |
| 1167 | /* deleg_want is ignored */ |
| 1168 | status = nfsd4_decode_share_access(argp, &open->op_share_access, |
| 1169 | &open->op_deleg_want, &dummy); |
| 1170 | if (status) |
| 1171 | return status; |
| 1172 | status = nfsd4_decode_share_deny(argp, &open->op_share_deny); |
| 1173 | if (status) |
| 1174 | return status; |
| 1175 | status = nfsd4_decode_state_owner4(argp, &open->op_clientid, |
| 1176 | &open->op_owner); |
| 1177 | if (status) |
| 1178 | return status; |
| 1179 | status = nfsd4_decode_openflag4(argp, open); |
| 1180 | if (status) |
| 1181 | return status; |
| 1182 | return nfsd4_decode_open_claim4(argp, open); |
| 1183 | } |
| 1184 | |
| 1185 | static __be32 |
| 1186 | nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, |
| 1187 | union nfsd4_op_u *u) |
| 1188 | { |
| 1189 | struct nfsd4_open_confirm *open_conf = &u->open_confirm; |
| 1190 | __be32 status; |
| 1191 | |
| 1192 | if (argp->minorversion >= 1) |
| 1193 | return nfserr_notsupp; |
| 1194 | |
| 1195 | status = nfsd4_decode_stateid4(argp, &open_conf->oc_req_stateid); |
| 1196 | if (status) |
| 1197 | return status; |
| 1198 | if (xdr_stream_decode_u32(argp->xdr, &open_conf->oc_seqid) < 0) |
| 1199 | return nfserr_bad_xdr; |
| 1200 | |
| 1201 | memset(&open_conf->oc_resp_stateid, 0, |
| 1202 | sizeof(open_conf->oc_resp_stateid)); |
| 1203 | return nfs_ok; |
| 1204 | } |
| 1205 | |
| 1206 | static __be32 |
| 1207 | nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, |
| 1208 | union nfsd4_op_u *u) |
| 1209 | { |
| 1210 | struct nfsd4_open_downgrade *open_down = &u->open_downgrade; |
| 1211 | __be32 status; |
| 1212 | |
| 1213 | memset(open_down, 0, sizeof(*open_down)); |
| 1214 | status = nfsd4_decode_stateid4(argp, &open_down->od_stateid); |
| 1215 | if (status) |
| 1216 | return status; |
| 1217 | if (xdr_stream_decode_u32(argp->xdr, &open_down->od_seqid) < 0) |
| 1218 | return nfserr_bad_xdr; |
| 1219 | /* deleg_want is ignored */ |
| 1220 | status = nfsd4_decode_share_access(argp, &open_down->od_share_access, |
| 1221 | &open_down->od_deleg_want, NULL); |
| 1222 | if (status) |
| 1223 | return status; |
| 1224 | return nfsd4_decode_share_deny(argp, &open_down->od_share_deny); |
| 1225 | } |
| 1226 | |
| 1227 | static __be32 |
| 1228 | nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 1229 | { |
| 1230 | struct nfsd4_putfh *putfh = &u->putfh; |
| 1231 | __be32 *p; |
| 1232 | |
| 1233 | if (xdr_stream_decode_u32(argp->xdr, &putfh->pf_fhlen) < 0) |
| 1234 | return nfserr_bad_xdr; |
| 1235 | if (putfh->pf_fhlen > NFS4_FHSIZE) |
| 1236 | return nfserr_bad_xdr; |
| 1237 | p = xdr_inline_decode(argp->xdr, putfh->pf_fhlen); |
| 1238 | if (!p) |
| 1239 | return nfserr_bad_xdr; |
| 1240 | putfh->pf_fhval = svcxdr_savemem(argp, p, putfh->pf_fhlen); |
| 1241 | if (!putfh->pf_fhval) |
| 1242 | return nfserr_jukebox; |
| 1243 | |
| 1244 | putfh->no_verify = false; |
| 1245 | return nfs_ok; |
| 1246 | } |
| 1247 | |
| 1248 | static __be32 |
| 1249 | nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, union nfsd4_op_u *p) |
| 1250 | { |
| 1251 | if (argp->minorversion == 0) |
| 1252 | return nfs_ok; |
| 1253 | return nfserr_notsupp; |
| 1254 | } |
| 1255 | |
| 1256 | static __be32 |
| 1257 | nfsd4_decode_read(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 1258 | { |
| 1259 | struct nfsd4_read *read = &u->read; |
| 1260 | __be32 status; |
| 1261 | |
| 1262 | memset(read, 0, sizeof(*read)); |
| 1263 | status = nfsd4_decode_stateid4(argp, &read->rd_stateid); |
| 1264 | if (status) |
| 1265 | return status; |
| 1266 | if (xdr_stream_decode_u64(argp->xdr, &read->rd_offset) < 0) |
| 1267 | return nfserr_bad_xdr; |
| 1268 | if (xdr_stream_decode_u32(argp->xdr, &read->rd_length) < 0) |
| 1269 | return nfserr_bad_xdr; |
| 1270 | |
| 1271 | return nfs_ok; |
| 1272 | } |
| 1273 | |
| 1274 | static __be32 |
| 1275 | nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 1276 | { |
| 1277 | struct nfsd4_readdir *readdir = &u->readdir; |
| 1278 | __be32 status; |
| 1279 | |
| 1280 | memset(readdir, 0, sizeof(*readdir)); |
| 1281 | if (xdr_stream_decode_u64(argp->xdr, &readdir->rd_cookie) < 0) |
| 1282 | return nfserr_bad_xdr; |
| 1283 | status = nfsd4_decode_verifier4(argp, &readdir->rd_verf); |
| 1284 | if (status) |
| 1285 | return status; |
| 1286 | if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_dircount) < 0) |
| 1287 | return nfserr_bad_xdr; |
| 1288 | if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_maxcount) < 0) |
| 1289 | return nfserr_bad_xdr; |
| 1290 | if (xdr_stream_decode_uint32_array(argp->xdr, readdir->rd_bmval, |
| 1291 | ARRAY_SIZE(readdir->rd_bmval)) < 0) |
| 1292 | return nfserr_bad_xdr; |
| 1293 | |
| 1294 | return nfs_ok; |
| 1295 | } |
| 1296 | |
| 1297 | static __be32 |
| 1298 | nfsd4_decode_remove(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 1299 | { |
| 1300 | struct nfsd4_remove *remove = &u->remove; |
| 1301 | memset(&remove->rm_cinfo, 0, sizeof(remove->rm_cinfo)); |
| 1302 | return nfsd4_decode_component4(argp, &remove->rm_name, &remove->rm_namelen); |
| 1303 | } |
| 1304 | |
| 1305 | static __be32 |
| 1306 | nfsd4_decode_rename(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 1307 | { |
| 1308 | struct nfsd4_rename *rename = &u->rename; |
| 1309 | __be32 status; |
| 1310 | |
| 1311 | memset(rename, 0, sizeof(*rename)); |
| 1312 | status = nfsd4_decode_component4(argp, &rename->rn_sname, &rename->rn_snamelen); |
| 1313 | if (status) |
| 1314 | return status; |
| 1315 | return nfsd4_decode_component4(argp, &rename->rn_tname, &rename->rn_tnamelen); |
| 1316 | } |
| 1317 | |
| 1318 | static __be32 |
| 1319 | nfsd4_decode_renew(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 1320 | { |
| 1321 | clientid_t *clientid = &u->renew; |
| 1322 | return nfsd4_decode_clientid4(argp, clientid); |
| 1323 | } |
| 1324 | |
| 1325 | static __be32 |
| 1326 | nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, |
| 1327 | union nfsd4_op_u *u) |
| 1328 | { |
| 1329 | struct nfsd4_secinfo *secinfo = &u->secinfo; |
| 1330 | secinfo->si_exp = NULL; |
| 1331 | return nfsd4_decode_component4(argp, &secinfo->si_name, &secinfo->si_namelen); |
| 1332 | } |
| 1333 | |
| 1334 | static __be32 |
| 1335 | nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 1336 | { |
| 1337 | struct nfsd4_setattr *setattr = &u->setattr; |
| 1338 | __be32 status; |
| 1339 | |
| 1340 | memset(setattr, 0, sizeof(*setattr)); |
| 1341 | status = nfsd4_decode_stateid4(argp, &setattr->sa_stateid); |
| 1342 | if (status) |
| 1343 | return status; |
| 1344 | return nfsd4_decode_fattr4(argp, setattr->sa_bmval, |
| 1345 | ARRAY_SIZE(setattr->sa_bmval), |
| 1346 | &setattr->sa_iattr, &setattr->sa_acl, |
| 1347 | &setattr->sa_label, NULL); |
| 1348 | } |
| 1349 | |
| 1350 | static __be32 |
| 1351 | nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 1352 | { |
| 1353 | struct nfsd4_setclientid *setclientid = &u->setclientid; |
| 1354 | __be32 *p, status; |
| 1355 | |
| 1356 | memset(setclientid, 0, sizeof(*setclientid)); |
| 1357 | |
| 1358 | if (argp->minorversion >= 1) |
| 1359 | return nfserr_notsupp; |
| 1360 | |
| 1361 | status = nfsd4_decode_verifier4(argp, &setclientid->se_verf); |
| 1362 | if (status) |
| 1363 | return status; |
| 1364 | status = nfsd4_decode_opaque(argp, &setclientid->se_name); |
| 1365 | if (status) |
| 1366 | return status; |
| 1367 | if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_prog) < 0) |
| 1368 | return nfserr_bad_xdr; |
| 1369 | if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_netid_len) < 0) |
| 1370 | return nfserr_bad_xdr; |
| 1371 | p = xdr_inline_decode(argp->xdr, setclientid->se_callback_netid_len); |
| 1372 | if (!p) |
| 1373 | return nfserr_bad_xdr; |
| 1374 | setclientid->se_callback_netid_val = svcxdr_savemem(argp, p, |
| 1375 | setclientid->se_callback_netid_len); |
| 1376 | if (!setclientid->se_callback_netid_val) |
| 1377 | return nfserr_jukebox; |
| 1378 | |
| 1379 | if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_addr_len) < 0) |
| 1380 | return nfserr_bad_xdr; |
| 1381 | p = xdr_inline_decode(argp->xdr, setclientid->se_callback_addr_len); |
| 1382 | if (!p) |
| 1383 | return nfserr_bad_xdr; |
| 1384 | setclientid->se_callback_addr_val = svcxdr_savemem(argp, p, |
| 1385 | setclientid->se_callback_addr_len); |
| 1386 | if (!setclientid->se_callback_addr_val) |
| 1387 | return nfserr_jukebox; |
| 1388 | if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_ident) < 0) |
| 1389 | return nfserr_bad_xdr; |
| 1390 | |
| 1391 | return nfs_ok; |
| 1392 | } |
| 1393 | |
| 1394 | static __be32 |
| 1395 | nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, |
| 1396 | union nfsd4_op_u *u) |
| 1397 | { |
| 1398 | struct nfsd4_setclientid_confirm *scd_c = &u->setclientid_confirm; |
| 1399 | __be32 status; |
| 1400 | |
| 1401 | if (argp->minorversion >= 1) |
| 1402 | return nfserr_notsupp; |
| 1403 | |
| 1404 | status = nfsd4_decode_clientid4(argp, &scd_c->sc_clientid); |
| 1405 | if (status) |
| 1406 | return status; |
| 1407 | return nfsd4_decode_verifier4(argp, &scd_c->sc_confirm); |
| 1408 | } |
| 1409 | |
| 1410 | /* Also used for NVERIFY */ |
| 1411 | static __be32 |
| 1412 | nfsd4_decode_verify(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 1413 | { |
| 1414 | struct nfsd4_verify *verify = &u->verify; |
| 1415 | __be32 *p, status; |
| 1416 | |
| 1417 | memset(verify, 0, sizeof(*verify)); |
| 1418 | |
| 1419 | status = nfsd4_decode_bitmap4(argp, verify->ve_bmval, |
| 1420 | ARRAY_SIZE(verify->ve_bmval)); |
| 1421 | if (status) |
| 1422 | return status; |
| 1423 | |
| 1424 | /* For convenience's sake, we compare raw xdr'd attributes in |
| 1425 | * nfsd4_proc_verify */ |
| 1426 | |
| 1427 | if (xdr_stream_decode_u32(argp->xdr, &verify->ve_attrlen) < 0) |
| 1428 | return nfserr_bad_xdr; |
| 1429 | p = xdr_inline_decode(argp->xdr, verify->ve_attrlen); |
| 1430 | if (!p) |
| 1431 | return nfserr_bad_xdr; |
| 1432 | verify->ve_attrval = svcxdr_savemem(argp, p, verify->ve_attrlen); |
| 1433 | if (!verify->ve_attrval) |
| 1434 | return nfserr_jukebox; |
| 1435 | |
| 1436 | return nfs_ok; |
| 1437 | } |
| 1438 | |
| 1439 | static __be32 |
| 1440 | nfsd4_decode_write(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 1441 | { |
| 1442 | struct nfsd4_write *write = &u->write; |
| 1443 | __be32 status; |
| 1444 | |
| 1445 | status = nfsd4_decode_stateid4(argp, &write->wr_stateid); |
| 1446 | if (status) |
| 1447 | return status; |
| 1448 | if (xdr_stream_decode_u64(argp->xdr, &write->wr_offset) < 0) |
| 1449 | return nfserr_bad_xdr; |
| 1450 | if (xdr_stream_decode_u32(argp->xdr, &write->wr_stable_how) < 0) |
| 1451 | return nfserr_bad_xdr; |
| 1452 | if (write->wr_stable_how > NFS_FILE_SYNC) |
| 1453 | return nfserr_bad_xdr; |
| 1454 | if (xdr_stream_decode_u32(argp->xdr, &write->wr_buflen) < 0) |
| 1455 | return nfserr_bad_xdr; |
| 1456 | if (!xdr_stream_subsegment(argp->xdr, &write->wr_payload, write->wr_buflen)) |
| 1457 | return nfserr_bad_xdr; |
| 1458 | |
| 1459 | write->wr_bytes_written = 0; |
| 1460 | write->wr_how_written = 0; |
| 1461 | memset(&write->wr_verifier, 0, sizeof(write->wr_verifier)); |
| 1462 | return nfs_ok; |
| 1463 | } |
| 1464 | |
| 1465 | static __be32 |
| 1466 | nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, |
| 1467 | union nfsd4_op_u *u) |
| 1468 | { |
| 1469 | struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner; |
| 1470 | __be32 status; |
| 1471 | |
| 1472 | if (argp->minorversion >= 1) |
| 1473 | return nfserr_notsupp; |
| 1474 | |
| 1475 | status = nfsd4_decode_state_owner4(argp, &rlockowner->rl_clientid, |
| 1476 | &rlockowner->rl_owner); |
| 1477 | if (status) |
| 1478 | return status; |
| 1479 | |
| 1480 | if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) |
| 1481 | return nfserr_inval; |
| 1482 | |
| 1483 | return nfs_ok; |
| 1484 | } |
| 1485 | |
| 1486 | static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, |
| 1487 | union nfsd4_op_u *u) |
| 1488 | { |
| 1489 | struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl; |
| 1490 | memset(bc, 0, sizeof(*bc)); |
| 1491 | if (xdr_stream_decode_u32(argp->xdr, &bc->bc_cb_program) < 0) |
| 1492 | return nfserr_bad_xdr; |
| 1493 | return nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec); |
| 1494 | } |
| 1495 | |
| 1496 | static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, |
| 1497 | union nfsd4_op_u *u) |
| 1498 | { |
| 1499 | struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session; |
| 1500 | u32 use_conn_in_rdma_mode; |
| 1501 | __be32 status; |
| 1502 | |
| 1503 | memset(bcts, 0, sizeof(*bcts)); |
| 1504 | status = nfsd4_decode_sessionid4(argp, &bcts->sessionid); |
| 1505 | if (status) |
| 1506 | return status; |
| 1507 | if (xdr_stream_decode_u32(argp->xdr, &bcts->dir) < 0) |
| 1508 | return nfserr_bad_xdr; |
| 1509 | if (xdr_stream_decode_u32(argp->xdr, &use_conn_in_rdma_mode) < 0) |
| 1510 | return nfserr_bad_xdr; |
| 1511 | |
| 1512 | return nfs_ok; |
| 1513 | } |
| 1514 | |
| 1515 | static __be32 |
| 1516 | nfsd4_decode_state_protect_ops(struct nfsd4_compoundargs *argp, |
| 1517 | struct nfsd4_exchange_id *exid) |
| 1518 | { |
| 1519 | __be32 status; |
| 1520 | |
| 1521 | status = nfsd4_decode_bitmap4(argp, exid->spo_must_enforce, |
| 1522 | ARRAY_SIZE(exid->spo_must_enforce)); |
| 1523 | if (status) |
| 1524 | return nfserr_bad_xdr; |
| 1525 | status = nfsd4_decode_bitmap4(argp, exid->spo_must_allow, |
| 1526 | ARRAY_SIZE(exid->spo_must_allow)); |
| 1527 | if (status) |
| 1528 | return nfserr_bad_xdr; |
| 1529 | |
| 1530 | return nfs_ok; |
| 1531 | } |
| 1532 | |
| 1533 | /* |
| 1534 | * This implementation currently does not support SP4_SSV. |
| 1535 | * This decoder simply skips over these arguments. |
| 1536 | */ |
| 1537 | static noinline __be32 |
| 1538 | nfsd4_decode_ssv_sp_parms(struct nfsd4_compoundargs *argp, |
| 1539 | struct nfsd4_exchange_id *exid) |
| 1540 | { |
| 1541 | u32 count, window, num_gss_handles; |
| 1542 | __be32 status; |
| 1543 | |
| 1544 | /* ssp_ops */ |
| 1545 | status = nfsd4_decode_state_protect_ops(argp, exid); |
| 1546 | if (status) |
| 1547 | return status; |
| 1548 | |
| 1549 | /* ssp_hash_algs<> */ |
| 1550 | if (xdr_stream_decode_u32(argp->xdr, &count) < 0) |
| 1551 | return nfserr_bad_xdr; |
| 1552 | while (count--) { |
| 1553 | status = nfsd4_decode_ignored_string(argp, 0); |
| 1554 | if (status) |
| 1555 | return status; |
| 1556 | } |
| 1557 | |
| 1558 | /* ssp_encr_algs<> */ |
| 1559 | if (xdr_stream_decode_u32(argp->xdr, &count) < 0) |
| 1560 | return nfserr_bad_xdr; |
| 1561 | while (count--) { |
| 1562 | status = nfsd4_decode_ignored_string(argp, 0); |
| 1563 | if (status) |
| 1564 | return status; |
| 1565 | } |
| 1566 | |
| 1567 | if (xdr_stream_decode_u32(argp->xdr, &window) < 0) |
| 1568 | return nfserr_bad_xdr; |
| 1569 | if (xdr_stream_decode_u32(argp->xdr, &num_gss_handles) < 0) |
| 1570 | return nfserr_bad_xdr; |
| 1571 | |
| 1572 | return nfs_ok; |
| 1573 | } |
| 1574 | |
| 1575 | static __be32 |
| 1576 | nfsd4_decode_state_protect4_a(struct nfsd4_compoundargs *argp, |
| 1577 | struct nfsd4_exchange_id *exid) |
| 1578 | { |
| 1579 | __be32 status; |
| 1580 | |
| 1581 | if (xdr_stream_decode_u32(argp->xdr, &exid->spa_how) < 0) |
| 1582 | return nfserr_bad_xdr; |
| 1583 | switch (exid->spa_how) { |
| 1584 | case SP4_NONE: |
| 1585 | break; |
| 1586 | case SP4_MACH_CRED: |
| 1587 | status = nfsd4_decode_state_protect_ops(argp, exid); |
| 1588 | if (status) |
| 1589 | return status; |
| 1590 | break; |
| 1591 | case SP4_SSV: |
| 1592 | status = nfsd4_decode_ssv_sp_parms(argp, exid); |
| 1593 | if (status) |
| 1594 | return status; |
| 1595 | break; |
| 1596 | default: |
| 1597 | return nfserr_bad_xdr; |
| 1598 | } |
| 1599 | |
| 1600 | return nfs_ok; |
| 1601 | } |
| 1602 | |
| 1603 | static __be32 |
| 1604 | nfsd4_decode_nfs_impl_id4(struct nfsd4_compoundargs *argp, |
| 1605 | struct nfsd4_exchange_id *exid) |
| 1606 | { |
| 1607 | __be32 status; |
| 1608 | u32 count; |
| 1609 | |
| 1610 | if (xdr_stream_decode_u32(argp->xdr, &count) < 0) |
| 1611 | return nfserr_bad_xdr; |
| 1612 | switch (count) { |
| 1613 | case 0: |
| 1614 | break; |
| 1615 | case 1: |
| 1616 | /* Note that RFC 8881 places no length limit on |
| 1617 | * nii_domain, but this implementation permits no |
| 1618 | * more than NFS4_OPAQUE_LIMIT bytes */ |
| 1619 | status = nfsd4_decode_opaque(argp, &exid->nii_domain); |
| 1620 | if (status) |
| 1621 | return status; |
| 1622 | /* Note that RFC 8881 places no length limit on |
| 1623 | * nii_name, but this implementation permits no |
| 1624 | * more than NFS4_OPAQUE_LIMIT bytes */ |
| 1625 | status = nfsd4_decode_opaque(argp, &exid->nii_name); |
| 1626 | if (status) |
| 1627 | return status; |
| 1628 | status = nfsd4_decode_nfstime4(argp, &exid->nii_time); |
| 1629 | if (status) |
| 1630 | return status; |
| 1631 | break; |
| 1632 | default: |
| 1633 | return nfserr_bad_xdr; |
| 1634 | } |
| 1635 | |
| 1636 | return nfs_ok; |
| 1637 | } |
| 1638 | |
| 1639 | static __be32 |
| 1640 | nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, |
| 1641 | union nfsd4_op_u *u) |
| 1642 | { |
| 1643 | struct nfsd4_exchange_id *exid = &u->exchange_id; |
| 1644 | __be32 status; |
| 1645 | |
| 1646 | memset(exid, 0, sizeof(*exid)); |
| 1647 | status = nfsd4_decode_verifier4(argp, &exid->verifier); |
| 1648 | if (status) |
| 1649 | return status; |
| 1650 | status = nfsd4_decode_opaque(argp, &exid->clname); |
| 1651 | if (status) |
| 1652 | return status; |
| 1653 | if (xdr_stream_decode_u32(argp->xdr, &exid->flags) < 0) |
| 1654 | return nfserr_bad_xdr; |
| 1655 | status = nfsd4_decode_state_protect4_a(argp, exid); |
| 1656 | if (status) |
| 1657 | return status; |
| 1658 | return nfsd4_decode_nfs_impl_id4(argp, exid); |
| 1659 | } |
| 1660 | |
| 1661 | static __be32 |
| 1662 | nfsd4_decode_channel_attrs4(struct nfsd4_compoundargs *argp, |
| 1663 | struct nfsd4_channel_attrs *ca) |
| 1664 | { |
| 1665 | __be32 *p; |
| 1666 | |
| 1667 | p = xdr_inline_decode(argp->xdr, XDR_UNIT * 7); |
| 1668 | if (!p) |
| 1669 | return nfserr_bad_xdr; |
| 1670 | |
| 1671 | /* headerpadsz is ignored */ |
| 1672 | p++; |
| 1673 | ca->maxreq_sz = be32_to_cpup(p++); |
| 1674 | ca->maxresp_sz = be32_to_cpup(p++); |
| 1675 | ca->maxresp_cached = be32_to_cpup(p++); |
| 1676 | ca->maxops = be32_to_cpup(p++); |
| 1677 | ca->maxreqs = be32_to_cpup(p++); |
| 1678 | ca->nr_rdma_attrs = be32_to_cpup(p); |
| 1679 | switch (ca->nr_rdma_attrs) { |
| 1680 | case 0: |
| 1681 | break; |
| 1682 | case 1: |
| 1683 | if (xdr_stream_decode_u32(argp->xdr, &ca->rdma_attrs) < 0) |
| 1684 | return nfserr_bad_xdr; |
| 1685 | break; |
| 1686 | default: |
| 1687 | return nfserr_bad_xdr; |
| 1688 | } |
| 1689 | |
| 1690 | return nfs_ok; |
| 1691 | } |
| 1692 | |
| 1693 | static __be32 |
| 1694 | nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, |
| 1695 | union nfsd4_op_u *u) |
| 1696 | { |
| 1697 | struct nfsd4_create_session *sess = &u->create_session; |
| 1698 | __be32 status; |
| 1699 | |
| 1700 | memset(sess, 0, sizeof(*sess)); |
| 1701 | status = nfsd4_decode_clientid4(argp, &sess->clientid); |
| 1702 | if (status) |
| 1703 | return status; |
| 1704 | if (xdr_stream_decode_u32(argp->xdr, &sess->seqid) < 0) |
| 1705 | return nfserr_bad_xdr; |
| 1706 | if (xdr_stream_decode_u32(argp->xdr, &sess->flags) < 0) |
| 1707 | return nfserr_bad_xdr; |
| 1708 | status = nfsd4_decode_channel_attrs4(argp, &sess->fore_channel); |
| 1709 | if (status) |
| 1710 | return status; |
| 1711 | status = nfsd4_decode_channel_attrs4(argp, &sess->back_channel); |
| 1712 | if (status) |
| 1713 | return status; |
| 1714 | if (xdr_stream_decode_u32(argp->xdr, &sess->callback_prog) < 0) |
| 1715 | return nfserr_bad_xdr; |
| 1716 | return nfsd4_decode_cb_sec(argp, &sess->cb_sec); |
| 1717 | } |
| 1718 | |
| 1719 | static __be32 |
| 1720 | nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, |
| 1721 | union nfsd4_op_u *u) |
| 1722 | { |
| 1723 | struct nfsd4_destroy_session *destroy_session = &u->destroy_session; |
| 1724 | return nfsd4_decode_sessionid4(argp, &destroy_session->sessionid); |
| 1725 | } |
| 1726 | |
| 1727 | static __be32 |
| 1728 | nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, |
| 1729 | union nfsd4_op_u *u) |
| 1730 | { |
| 1731 | struct nfsd4_free_stateid *free_stateid = &u->free_stateid; |
| 1732 | return nfsd4_decode_stateid4(argp, &free_stateid->fr_stateid); |
| 1733 | } |
| 1734 | |
| 1735 | #ifdef CONFIG_NFSD_PNFS |
| 1736 | static __be32 |
| 1737 | nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp, |
| 1738 | union nfsd4_op_u *u) |
| 1739 | { |
| 1740 | struct nfsd4_getdeviceinfo *gdev = &u->getdeviceinfo; |
| 1741 | __be32 status; |
| 1742 | |
| 1743 | memset(gdev, 0, sizeof(*gdev)); |
| 1744 | status = nfsd4_decode_deviceid4(argp, &gdev->gd_devid); |
| 1745 | if (status) |
| 1746 | return status; |
| 1747 | if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_layout_type) < 0) |
| 1748 | return nfserr_bad_xdr; |
| 1749 | if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_maxcount) < 0) |
| 1750 | return nfserr_bad_xdr; |
| 1751 | if (xdr_stream_decode_uint32_array(argp->xdr, |
| 1752 | &gdev->gd_notify_types, 1) < 0) |
| 1753 | return nfserr_bad_xdr; |
| 1754 | |
| 1755 | return nfs_ok; |
| 1756 | } |
| 1757 | |
| 1758 | static __be32 |
| 1759 | nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp, |
| 1760 | union nfsd4_op_u *u) |
| 1761 | { |
| 1762 | struct nfsd4_layoutcommit *lcp = &u->layoutcommit; |
| 1763 | __be32 *p, status; |
| 1764 | |
| 1765 | memset(lcp, 0, sizeof(*lcp)); |
| 1766 | if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.offset) < 0) |
| 1767 | return nfserr_bad_xdr; |
| 1768 | if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.length) < 0) |
| 1769 | return nfserr_bad_xdr; |
| 1770 | if (xdr_stream_decode_bool(argp->xdr, &lcp->lc_reclaim) < 0) |
| 1771 | return nfserr_bad_xdr; |
| 1772 | status = nfsd4_decode_stateid4(argp, &lcp->lc_sid); |
| 1773 | if (status) |
| 1774 | return status; |
| 1775 | if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_newoffset) < 0) |
| 1776 | return nfserr_bad_xdr; |
| 1777 | if (lcp->lc_newoffset) { |
| 1778 | if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_last_wr) < 0) |
| 1779 | return nfserr_bad_xdr; |
| 1780 | } else |
| 1781 | lcp->lc_last_wr = 0; |
| 1782 | p = xdr_inline_decode(argp->xdr, XDR_UNIT); |
| 1783 | if (!p) |
| 1784 | return nfserr_bad_xdr; |
| 1785 | if (xdr_item_is_present(p)) { |
| 1786 | status = nfsd4_decode_nfstime4(argp, &lcp->lc_mtime); |
| 1787 | if (status) |
| 1788 | return status; |
| 1789 | } else { |
| 1790 | lcp->lc_mtime.tv_nsec = UTIME_NOW; |
| 1791 | } |
| 1792 | return nfsd4_decode_layoutupdate4(argp, lcp); |
| 1793 | } |
| 1794 | |
| 1795 | static __be32 |
| 1796 | nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp, |
| 1797 | union nfsd4_op_u *u) |
| 1798 | { |
| 1799 | struct nfsd4_layoutget *lgp = &u->layoutget; |
| 1800 | __be32 status; |
| 1801 | |
| 1802 | memset(lgp, 0, sizeof(*lgp)); |
| 1803 | if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_signal) < 0) |
| 1804 | return nfserr_bad_xdr; |
| 1805 | if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_layout_type) < 0) |
| 1806 | return nfserr_bad_xdr; |
| 1807 | if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_seg.iomode) < 0) |
| 1808 | return nfserr_bad_xdr; |
| 1809 | if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.offset) < 0) |
| 1810 | return nfserr_bad_xdr; |
| 1811 | if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.length) < 0) |
| 1812 | return nfserr_bad_xdr; |
| 1813 | if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_minlength) < 0) |
| 1814 | return nfserr_bad_xdr; |
| 1815 | status = nfsd4_decode_stateid4(argp, &lgp->lg_sid); |
| 1816 | if (status) |
| 1817 | return status; |
| 1818 | if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_maxcount) < 0) |
| 1819 | return nfserr_bad_xdr; |
| 1820 | |
| 1821 | return nfs_ok; |
| 1822 | } |
| 1823 | |
| 1824 | static __be32 |
| 1825 | nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp, |
| 1826 | union nfsd4_op_u *u) |
| 1827 | { |
| 1828 | struct nfsd4_layoutreturn *lrp = &u->layoutreturn; |
| 1829 | memset(lrp, 0, sizeof(*lrp)); |
| 1830 | if (xdr_stream_decode_bool(argp->xdr, &lrp->lr_reclaim) < 0) |
| 1831 | return nfserr_bad_xdr; |
| 1832 | if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_layout_type) < 0) |
| 1833 | return nfserr_bad_xdr; |
| 1834 | if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_seg.iomode) < 0) |
| 1835 | return nfserr_bad_xdr; |
| 1836 | return nfsd4_decode_layoutreturn4(argp, lrp); |
| 1837 | } |
| 1838 | #endif /* CONFIG_NFSD_PNFS */ |
| 1839 | |
| 1840 | static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, |
| 1841 | union nfsd4_op_u *u) |
| 1842 | { |
| 1843 | struct nfsd4_secinfo_no_name *sin = &u->secinfo_no_name; |
| 1844 | if (xdr_stream_decode_u32(argp->xdr, &sin->sin_style) < 0) |
| 1845 | return nfserr_bad_xdr; |
| 1846 | |
| 1847 | sin->sin_exp = NULL; |
| 1848 | return nfs_ok; |
| 1849 | } |
| 1850 | |
| 1851 | static __be32 |
| 1852 | nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, |
| 1853 | union nfsd4_op_u *u) |
| 1854 | { |
| 1855 | struct nfsd4_sequence *seq = &u->sequence; |
| 1856 | __be32 *p, status; |
| 1857 | |
| 1858 | status = nfsd4_decode_sessionid4(argp, &seq->sessionid); |
| 1859 | if (status) |
| 1860 | return status; |
| 1861 | p = xdr_inline_decode(argp->xdr, XDR_UNIT * 4); |
| 1862 | if (!p) |
| 1863 | return nfserr_bad_xdr; |
| 1864 | seq->seqid = be32_to_cpup(p++); |
| 1865 | seq->slotid = be32_to_cpup(p++); |
| 1866 | seq->maxslots = be32_to_cpup(p++); |
| 1867 | seq->cachethis = be32_to_cpup(p); |
| 1868 | |
| 1869 | seq->status_flags = 0; |
| 1870 | return nfs_ok; |
| 1871 | } |
| 1872 | |
| 1873 | static __be32 |
| 1874 | nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, |
| 1875 | union nfsd4_op_u *u) |
| 1876 | { |
| 1877 | struct nfsd4_test_stateid *test_stateid = &u->test_stateid; |
| 1878 | struct nfsd4_test_stateid_id *stateid; |
| 1879 | __be32 status; |
| 1880 | u32 i; |
| 1881 | |
| 1882 | memset(test_stateid, 0, sizeof(*test_stateid)); |
| 1883 | if (xdr_stream_decode_u32(argp->xdr, &test_stateid->ts_num_ids) < 0) |
| 1884 | return nfserr_bad_xdr; |
| 1885 | |
| 1886 | INIT_LIST_HEAD(&test_stateid->ts_stateid_list); |
| 1887 | for (i = 0; i < test_stateid->ts_num_ids; i++) { |
| 1888 | stateid = svcxdr_tmpalloc(argp, sizeof(*stateid)); |
| 1889 | if (!stateid) |
| 1890 | return nfserr_jukebox; |
| 1891 | INIT_LIST_HEAD(&stateid->ts_id_list); |
| 1892 | list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list); |
| 1893 | status = nfsd4_decode_stateid4(argp, &stateid->ts_id_stateid); |
| 1894 | if (status) |
| 1895 | return status; |
| 1896 | } |
| 1897 | |
| 1898 | return nfs_ok; |
| 1899 | } |
| 1900 | |
| 1901 | static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, |
| 1902 | union nfsd4_op_u *u) |
| 1903 | { |
| 1904 | struct nfsd4_destroy_clientid *dc = &u->destroy_clientid; |
| 1905 | return nfsd4_decode_clientid4(argp, &dc->clientid); |
| 1906 | } |
| 1907 | |
| 1908 | static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, |
| 1909 | union nfsd4_op_u *u) |
| 1910 | { |
| 1911 | struct nfsd4_reclaim_complete *rc = &u->reclaim_complete; |
| 1912 | if (xdr_stream_decode_bool(argp->xdr, &rc->rca_one_fs) < 0) |
| 1913 | return nfserr_bad_xdr; |
| 1914 | return nfs_ok; |
| 1915 | } |
| 1916 | |
| 1917 | static __be32 |
| 1918 | nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp, |
| 1919 | union nfsd4_op_u *u) |
| 1920 | { |
| 1921 | struct nfsd4_fallocate *fallocate = &u->allocate; |
| 1922 | __be32 status; |
| 1923 | |
| 1924 | status = nfsd4_decode_stateid4(argp, &fallocate->falloc_stateid); |
| 1925 | if (status) |
| 1926 | return status; |
| 1927 | if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_offset) < 0) |
| 1928 | return nfserr_bad_xdr; |
| 1929 | if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_length) < 0) |
| 1930 | return nfserr_bad_xdr; |
| 1931 | |
| 1932 | return nfs_ok; |
| 1933 | } |
| 1934 | |
| 1935 | static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp, |
| 1936 | struct nl4_server *ns) |
| 1937 | { |
| 1938 | struct nfs42_netaddr *naddr; |
| 1939 | __be32 *p; |
| 1940 | |
| 1941 | if (xdr_stream_decode_u32(argp->xdr, &ns->nl4_type) < 0) |
| 1942 | return nfserr_bad_xdr; |
| 1943 | |
| 1944 | /* currently support for 1 inter-server source server */ |
| 1945 | switch (ns->nl4_type) { |
| 1946 | case NL4_NETADDR: |
| 1947 | naddr = &ns->u.nl4_addr; |
| 1948 | |
| 1949 | if (xdr_stream_decode_u32(argp->xdr, &naddr->netid_len) < 0) |
| 1950 | return nfserr_bad_xdr; |
| 1951 | if (naddr->netid_len > RPCBIND_MAXNETIDLEN) |
| 1952 | return nfserr_bad_xdr; |
| 1953 | |
| 1954 | p = xdr_inline_decode(argp->xdr, naddr->netid_len); |
| 1955 | if (!p) |
| 1956 | return nfserr_bad_xdr; |
| 1957 | memcpy(naddr->netid, p, naddr->netid_len); |
| 1958 | |
| 1959 | if (xdr_stream_decode_u32(argp->xdr, &naddr->addr_len) < 0) |
| 1960 | return nfserr_bad_xdr; |
| 1961 | if (naddr->addr_len > RPCBIND_MAXUADDRLEN) |
| 1962 | return nfserr_bad_xdr; |
| 1963 | |
| 1964 | p = xdr_inline_decode(argp->xdr, naddr->addr_len); |
| 1965 | if (!p) |
| 1966 | return nfserr_bad_xdr; |
| 1967 | memcpy(naddr->addr, p, naddr->addr_len); |
| 1968 | break; |
| 1969 | default: |
| 1970 | return nfserr_bad_xdr; |
| 1971 | } |
| 1972 | |
| 1973 | return nfs_ok; |
| 1974 | } |
| 1975 | |
| 1976 | static __be32 |
| 1977 | nfsd4_decode_copy(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 1978 | { |
| 1979 | struct nfsd4_copy *copy = &u->copy; |
| 1980 | u32 consecutive, i, count, sync; |
| 1981 | struct nl4_server *ns_dummy; |
| 1982 | __be32 status; |
| 1983 | |
| 1984 | memset(copy, 0, sizeof(*copy)); |
| 1985 | status = nfsd4_decode_stateid4(argp, ©->cp_src_stateid); |
| 1986 | if (status) |
| 1987 | return status; |
| 1988 | status = nfsd4_decode_stateid4(argp, ©->cp_dst_stateid); |
| 1989 | if (status) |
| 1990 | return status; |
| 1991 | if (xdr_stream_decode_u64(argp->xdr, ©->cp_src_pos) < 0) |
| 1992 | return nfserr_bad_xdr; |
| 1993 | if (xdr_stream_decode_u64(argp->xdr, ©->cp_dst_pos) < 0) |
| 1994 | return nfserr_bad_xdr; |
| 1995 | if (xdr_stream_decode_u64(argp->xdr, ©->cp_count) < 0) |
| 1996 | return nfserr_bad_xdr; |
| 1997 | /* ca_consecutive: we always do consecutive copies */ |
| 1998 | if (xdr_stream_decode_u32(argp->xdr, &consecutive) < 0) |
| 1999 | return nfserr_bad_xdr; |
| 2000 | if (xdr_stream_decode_bool(argp->xdr, &sync) < 0) |
| 2001 | return nfserr_bad_xdr; |
| 2002 | nfsd4_copy_set_sync(copy, sync); |
| 2003 | |
| 2004 | if (xdr_stream_decode_u32(argp->xdr, &count) < 0) |
| 2005 | return nfserr_bad_xdr; |
| 2006 | copy->cp_src = svcxdr_tmpalloc(argp, sizeof(*copy->cp_src)); |
| 2007 | if (copy->cp_src == NULL) |
| 2008 | return nfserr_jukebox; |
| 2009 | if (count == 0) { /* intra-server copy */ |
| 2010 | __set_bit(NFSD4_COPY_F_INTRA, ©->cp_flags); |
| 2011 | return nfs_ok; |
| 2012 | } |
| 2013 | |
| 2014 | /* decode all the supplied server addresses but use only the first */ |
| 2015 | status = nfsd4_decode_nl4_server(argp, copy->cp_src); |
| 2016 | if (status) |
| 2017 | return status; |
| 2018 | |
| 2019 | ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL); |
| 2020 | if (ns_dummy == NULL) |
| 2021 | return nfserr_jukebox; |
| 2022 | for (i = 0; i < count - 1; i++) { |
| 2023 | status = nfsd4_decode_nl4_server(argp, ns_dummy); |
| 2024 | if (status) { |
| 2025 | kfree(ns_dummy); |
| 2026 | return status; |
| 2027 | } |
| 2028 | } |
| 2029 | kfree(ns_dummy); |
| 2030 | |
| 2031 | return nfs_ok; |
| 2032 | } |
| 2033 | |
| 2034 | static __be32 |
| 2035 | nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp, |
| 2036 | union nfsd4_op_u *u) |
| 2037 | { |
| 2038 | struct nfsd4_copy_notify *cn = &u->copy_notify; |
| 2039 | __be32 status; |
| 2040 | |
| 2041 | memset(cn, 0, sizeof(*cn)); |
| 2042 | cn->cpn_src = svcxdr_tmpalloc(argp, sizeof(*cn->cpn_src)); |
| 2043 | if (cn->cpn_src == NULL) |
| 2044 | return nfserr_jukebox; |
| 2045 | cn->cpn_dst = svcxdr_tmpalloc(argp, sizeof(*cn->cpn_dst)); |
| 2046 | if (cn->cpn_dst == NULL) |
| 2047 | return nfserr_jukebox; |
| 2048 | |
| 2049 | status = nfsd4_decode_stateid4(argp, &cn->cpn_src_stateid); |
| 2050 | if (status) |
| 2051 | return status; |
| 2052 | return nfsd4_decode_nl4_server(argp, cn->cpn_dst); |
| 2053 | } |
| 2054 | |
| 2055 | static __be32 |
| 2056 | nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp, |
| 2057 | union nfsd4_op_u *u) |
| 2058 | { |
| 2059 | struct nfsd4_offload_status *os = &u->offload_status; |
| 2060 | os->count = 0; |
| 2061 | os->status = 0; |
| 2062 | return nfsd4_decode_stateid4(argp, &os->stateid); |
| 2063 | } |
| 2064 | |
| 2065 | static __be32 |
| 2066 | nfsd4_decode_seek(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 2067 | { |
| 2068 | struct nfsd4_seek *seek = &u->seek; |
| 2069 | __be32 status; |
| 2070 | |
| 2071 | status = nfsd4_decode_stateid4(argp, &seek->seek_stateid); |
| 2072 | if (status) |
| 2073 | return status; |
| 2074 | if (xdr_stream_decode_u64(argp->xdr, &seek->seek_offset) < 0) |
| 2075 | return nfserr_bad_xdr; |
| 2076 | if (xdr_stream_decode_u32(argp->xdr, &seek->seek_whence) < 0) |
| 2077 | return nfserr_bad_xdr; |
| 2078 | |
| 2079 | seek->seek_eof = 0; |
| 2080 | seek->seek_pos = 0; |
| 2081 | return nfs_ok; |
| 2082 | } |
| 2083 | |
| 2084 | static __be32 |
| 2085 | nfsd4_decode_clone(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) |
| 2086 | { |
| 2087 | struct nfsd4_clone *clone = &u->clone; |
| 2088 | __be32 status; |
| 2089 | |
| 2090 | status = nfsd4_decode_stateid4(argp, &clone->cl_src_stateid); |
| 2091 | if (status) |
| 2092 | return status; |
| 2093 | status = nfsd4_decode_stateid4(argp, &clone->cl_dst_stateid); |
| 2094 | if (status) |
| 2095 | return status; |
| 2096 | if (xdr_stream_decode_u64(argp->xdr, &clone->cl_src_pos) < 0) |
| 2097 | return nfserr_bad_xdr; |
| 2098 | if (xdr_stream_decode_u64(argp->xdr, &clone->cl_dst_pos) < 0) |
| 2099 | return nfserr_bad_xdr; |
| 2100 | if (xdr_stream_decode_u64(argp->xdr, &clone->cl_count) < 0) |
| 2101 | return nfserr_bad_xdr; |
| 2102 | |
| 2103 | return nfs_ok; |
| 2104 | } |
| 2105 | |
| 2106 | /* |
| 2107 | * XDR data that is more than PAGE_SIZE in size is normally part of a |
| 2108 | * read or write. However, the size of extended attributes is limited |
| 2109 | * by the maximum request size, and then further limited by the underlying |
| 2110 | * filesystem limits. This can exceed PAGE_SIZE (currently, XATTR_SIZE_MAX |
| 2111 | * is 64k). Since there is no kvec- or page-based interface to xattrs, |
| 2112 | * and we're not dealing with contiguous pages, we need to do some copying. |
| 2113 | */ |
| 2114 | |
| 2115 | /* |
| 2116 | * Decode data into buffer. |
| 2117 | */ |
| 2118 | static __be32 |
| 2119 | nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct xdr_buf *xdr, |
| 2120 | char **bufp, u32 buflen) |
| 2121 | { |
| 2122 | struct page **pages = xdr->pages; |
| 2123 | struct kvec *head = xdr->head; |
| 2124 | char *tmp, *dp; |
| 2125 | u32 len; |
| 2126 | |
| 2127 | if (buflen <= head->iov_len) { |
| 2128 | /* |
| 2129 | * We're in luck, the head has enough space. Just return |
| 2130 | * the head, no need for copying. |
| 2131 | */ |
| 2132 | *bufp = head->iov_base; |
| 2133 | return 0; |
| 2134 | } |
| 2135 | |
| 2136 | tmp = svcxdr_tmpalloc(argp, buflen); |
| 2137 | if (tmp == NULL) |
| 2138 | return nfserr_jukebox; |
| 2139 | |
| 2140 | dp = tmp; |
| 2141 | memcpy(dp, head->iov_base, head->iov_len); |
| 2142 | buflen -= head->iov_len; |
| 2143 | dp += head->iov_len; |
| 2144 | |
| 2145 | while (buflen > 0) { |
| 2146 | len = min_t(u32, buflen, PAGE_SIZE); |
| 2147 | memcpy(dp, page_address(*pages), len); |
| 2148 | |
| 2149 | buflen -= len; |
| 2150 | dp += len; |
| 2151 | pages++; |
| 2152 | } |
| 2153 | |
| 2154 | *bufp = tmp; |
| 2155 | return 0; |
| 2156 | } |
| 2157 | |
| 2158 | /* |
| 2159 | * Get a user extended attribute name from the XDR buffer. |
| 2160 | * It will not have the "user." prefix, so prepend it. |
| 2161 | * Lastly, check for nul characters in the name. |
| 2162 | */ |
| 2163 | static __be32 |
| 2164 | nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep) |
| 2165 | { |
| 2166 | char *name, *sp, *dp; |
| 2167 | u32 namelen, cnt; |
| 2168 | __be32 *p; |
| 2169 | |
| 2170 | if (xdr_stream_decode_u32(argp->xdr, &namelen) < 0) |
| 2171 | return nfserr_bad_xdr; |
| 2172 | if (namelen > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) |
| 2173 | return nfserr_nametoolong; |
| 2174 | if (namelen == 0) |
| 2175 | return nfserr_bad_xdr; |
| 2176 | p = xdr_inline_decode(argp->xdr, namelen); |
| 2177 | if (!p) |
| 2178 | return nfserr_bad_xdr; |
| 2179 | name = svcxdr_tmpalloc(argp, namelen + XATTR_USER_PREFIX_LEN + 1); |
| 2180 | if (!name) |
| 2181 | return nfserr_jukebox; |
| 2182 | memcpy(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); |
| 2183 | |
| 2184 | /* |
| 2185 | * Copy the extended attribute name over while checking for 0 |
| 2186 | * characters. |
| 2187 | */ |
| 2188 | sp = (char *)p; |
| 2189 | dp = name + XATTR_USER_PREFIX_LEN; |
| 2190 | cnt = namelen; |
| 2191 | |
| 2192 | while (cnt-- > 0) { |
| 2193 | if (*sp == '\0') |
| 2194 | return nfserr_bad_xdr; |
| 2195 | *dp++ = *sp++; |
| 2196 | } |
| 2197 | *dp = '\0'; |
| 2198 | |
| 2199 | *namep = name; |
| 2200 | |
| 2201 | return nfs_ok; |
| 2202 | } |
| 2203 | |
| 2204 | /* |
| 2205 | * A GETXATTR op request comes without a length specifier. We just set the |
| 2206 | * maximum length for the reply based on XATTR_SIZE_MAX and the maximum |
| 2207 | * channel reply size. nfsd_getxattr will probe the length of the xattr, |
| 2208 | * check it against getxa_len, and allocate + return the value. |
| 2209 | */ |
| 2210 | static __be32 |
| 2211 | nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp, |
| 2212 | union nfsd4_op_u *u) |
| 2213 | { |
| 2214 | struct nfsd4_getxattr *getxattr = &u->getxattr; |
| 2215 | __be32 status; |
| 2216 | u32 maxcount; |
| 2217 | |
| 2218 | memset(getxattr, 0, sizeof(*getxattr)); |
| 2219 | status = nfsd4_decode_xattr_name(argp, &getxattr->getxa_name); |
| 2220 | if (status) |
| 2221 | return status; |
| 2222 | |
| 2223 | maxcount = svc_max_payload(argp->rqstp); |
| 2224 | maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount); |
| 2225 | |
| 2226 | getxattr->getxa_len = maxcount; |
| 2227 | return nfs_ok; |
| 2228 | } |
| 2229 | |
| 2230 | static __be32 |
| 2231 | nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp, |
| 2232 | union nfsd4_op_u *u) |
| 2233 | { |
| 2234 | struct nfsd4_setxattr *setxattr = &u->setxattr; |
| 2235 | u32 flags, maxcount, size; |
| 2236 | __be32 status; |
| 2237 | |
| 2238 | memset(setxattr, 0, sizeof(*setxattr)); |
| 2239 | |
| 2240 | if (xdr_stream_decode_u32(argp->xdr, &flags) < 0) |
| 2241 | return nfserr_bad_xdr; |
| 2242 | |
| 2243 | if (flags > SETXATTR4_REPLACE) |
| 2244 | return nfserr_inval; |
| 2245 | setxattr->setxa_flags = flags; |
| 2246 | |
| 2247 | status = nfsd4_decode_xattr_name(argp, &setxattr->setxa_name); |
| 2248 | if (status) |
| 2249 | return status; |
| 2250 | |
| 2251 | maxcount = svc_max_payload(argp->rqstp); |
| 2252 | maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount); |
| 2253 | |
| 2254 | if (xdr_stream_decode_u32(argp->xdr, &size) < 0) |
| 2255 | return nfserr_bad_xdr; |
| 2256 | if (size > maxcount) |
| 2257 | return nfserr_xattr2big; |
| 2258 | |
| 2259 | setxattr->setxa_len = size; |
| 2260 | if (size > 0) { |
| 2261 | struct xdr_buf payload; |
| 2262 | |
| 2263 | if (!xdr_stream_subsegment(argp->xdr, &payload, size)) |
| 2264 | return nfserr_bad_xdr; |
| 2265 | status = nfsd4_vbuf_from_vector(argp, &payload, |
| 2266 | &setxattr->setxa_buf, size); |
| 2267 | } |
| 2268 | |
| 2269 | return nfs_ok; |
| 2270 | } |
| 2271 | |
| 2272 | static __be32 |
| 2273 | nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp, |
| 2274 | union nfsd4_op_u *u) |
| 2275 | { |
| 2276 | struct nfsd4_listxattrs *listxattrs = &u->listxattrs; |
| 2277 | u32 maxcount; |
| 2278 | |
| 2279 | memset(listxattrs, 0, sizeof(*listxattrs)); |
| 2280 | |
| 2281 | if (xdr_stream_decode_u64(argp->xdr, &listxattrs->lsxa_cookie) < 0) |
| 2282 | return nfserr_bad_xdr; |
| 2283 | |
| 2284 | /* |
| 2285 | * If the cookie is too large to have even one user.x attribute |
| 2286 | * plus trailing '\0' left in a maximum size buffer, it's invalid. |
| 2287 | */ |
| 2288 | if (listxattrs->lsxa_cookie >= |
| 2289 | (XATTR_LIST_MAX / (XATTR_USER_PREFIX_LEN + 2))) |
| 2290 | return nfserr_badcookie; |
| 2291 | |
| 2292 | if (xdr_stream_decode_u32(argp->xdr, &maxcount) < 0) |
| 2293 | return nfserr_bad_xdr; |
| 2294 | if (maxcount < 8) |
| 2295 | /* Always need at least 2 words (length and one character) */ |
| 2296 | return nfserr_inval; |
| 2297 | |
| 2298 | maxcount = min(maxcount, svc_max_payload(argp->rqstp)); |
| 2299 | listxattrs->lsxa_maxcount = maxcount; |
| 2300 | |
| 2301 | return nfs_ok; |
| 2302 | } |
| 2303 | |
| 2304 | static __be32 |
| 2305 | nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp, |
| 2306 | union nfsd4_op_u *u) |
| 2307 | { |
| 2308 | struct nfsd4_removexattr *removexattr = &u->removexattr; |
| 2309 | memset(removexattr, 0, sizeof(*removexattr)); |
| 2310 | return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name); |
| 2311 | } |
| 2312 | |
| 2313 | static __be32 |
| 2314 | nfsd4_decode_noop(struct nfsd4_compoundargs *argp, union nfsd4_op_u *p) |
| 2315 | { |
| 2316 | return nfs_ok; |
| 2317 | } |
| 2318 | |
| 2319 | static __be32 |
| 2320 | nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, union nfsd4_op_u *p) |
| 2321 | { |
| 2322 | return nfserr_notsupp; |
| 2323 | } |
| 2324 | |
| 2325 | typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u); |
| 2326 | |
| 2327 | static const nfsd4_dec nfsd4_dec_ops[] = { |
| 2328 | [OP_ACCESS] = nfsd4_decode_access, |
| 2329 | [OP_CLOSE] = nfsd4_decode_close, |
| 2330 | [OP_COMMIT] = nfsd4_decode_commit, |
| 2331 | [OP_CREATE] = nfsd4_decode_create, |
| 2332 | [OP_DELEGPURGE] = nfsd4_decode_notsupp, |
| 2333 | [OP_DELEGRETURN] = nfsd4_decode_delegreturn, |
| 2334 | [OP_GETATTR] = nfsd4_decode_getattr, |
| 2335 | [OP_GETFH] = nfsd4_decode_noop, |
| 2336 | [OP_LINK] = nfsd4_decode_link, |
| 2337 | [OP_LOCK] = nfsd4_decode_lock, |
| 2338 | [OP_LOCKT] = nfsd4_decode_lockt, |
| 2339 | [OP_LOCKU] = nfsd4_decode_locku, |
| 2340 | [OP_LOOKUP] = nfsd4_decode_lookup, |
| 2341 | [OP_LOOKUPP] = nfsd4_decode_noop, |
| 2342 | [OP_NVERIFY] = nfsd4_decode_verify, |
| 2343 | [OP_OPEN] = nfsd4_decode_open, |
| 2344 | [OP_OPENATTR] = nfsd4_decode_notsupp, |
| 2345 | [OP_OPEN_CONFIRM] = nfsd4_decode_open_confirm, |
| 2346 | [OP_OPEN_DOWNGRADE] = nfsd4_decode_open_downgrade, |
| 2347 | [OP_PUTFH] = nfsd4_decode_putfh, |
| 2348 | [OP_PUTPUBFH] = nfsd4_decode_putpubfh, |
| 2349 | [OP_PUTROOTFH] = nfsd4_decode_noop, |
| 2350 | [OP_READ] = nfsd4_decode_read, |
| 2351 | [OP_READDIR] = nfsd4_decode_readdir, |
| 2352 | [OP_READLINK] = nfsd4_decode_noop, |
| 2353 | [OP_REMOVE] = nfsd4_decode_remove, |
| 2354 | [OP_RENAME] = nfsd4_decode_rename, |
| 2355 | [OP_RENEW] = nfsd4_decode_renew, |
| 2356 | [OP_RESTOREFH] = nfsd4_decode_noop, |
| 2357 | [OP_SAVEFH] = nfsd4_decode_noop, |
| 2358 | [OP_SECINFO] = nfsd4_decode_secinfo, |
| 2359 | [OP_SETATTR] = nfsd4_decode_setattr, |
| 2360 | [OP_SETCLIENTID] = nfsd4_decode_setclientid, |
| 2361 | [OP_SETCLIENTID_CONFIRM] = nfsd4_decode_setclientid_confirm, |
| 2362 | [OP_VERIFY] = nfsd4_decode_verify, |
| 2363 | [OP_WRITE] = nfsd4_decode_write, |
| 2364 | [OP_RELEASE_LOCKOWNER] = nfsd4_decode_release_lockowner, |
| 2365 | |
| 2366 | /* new operations for NFSv4.1 */ |
| 2367 | [OP_BACKCHANNEL_CTL] = nfsd4_decode_backchannel_ctl, |
| 2368 | [OP_BIND_CONN_TO_SESSION] = nfsd4_decode_bind_conn_to_session, |
| 2369 | [OP_EXCHANGE_ID] = nfsd4_decode_exchange_id, |
| 2370 | [OP_CREATE_SESSION] = nfsd4_decode_create_session, |
| 2371 | [OP_DESTROY_SESSION] = nfsd4_decode_destroy_session, |
| 2372 | [OP_FREE_STATEID] = nfsd4_decode_free_stateid, |
| 2373 | [OP_GET_DIR_DELEGATION] = nfsd4_decode_notsupp, |
| 2374 | #ifdef CONFIG_NFSD_PNFS |
| 2375 | [OP_GETDEVICEINFO] = nfsd4_decode_getdeviceinfo, |
| 2376 | [OP_GETDEVICELIST] = nfsd4_decode_notsupp, |
| 2377 | [OP_LAYOUTCOMMIT] = nfsd4_decode_layoutcommit, |
| 2378 | [OP_LAYOUTGET] = nfsd4_decode_layoutget, |
| 2379 | [OP_LAYOUTRETURN] = nfsd4_decode_layoutreturn, |
| 2380 | #else |
| 2381 | [OP_GETDEVICEINFO] = nfsd4_decode_notsupp, |
| 2382 | [OP_GETDEVICELIST] = nfsd4_decode_notsupp, |
| 2383 | [OP_LAYOUTCOMMIT] = nfsd4_decode_notsupp, |
| 2384 | [OP_LAYOUTGET] = nfsd4_decode_notsupp, |
| 2385 | [OP_LAYOUTRETURN] = nfsd4_decode_notsupp, |
| 2386 | #endif |
| 2387 | [OP_SECINFO_NO_NAME] = nfsd4_decode_secinfo_no_name, |
| 2388 | [OP_SEQUENCE] = nfsd4_decode_sequence, |
| 2389 | [OP_SET_SSV] = nfsd4_decode_notsupp, |
| 2390 | [OP_TEST_STATEID] = nfsd4_decode_test_stateid, |
| 2391 | [OP_WANT_DELEGATION] = nfsd4_decode_notsupp, |
| 2392 | [OP_DESTROY_CLIENTID] = nfsd4_decode_destroy_clientid, |
| 2393 | [OP_RECLAIM_COMPLETE] = nfsd4_decode_reclaim_complete, |
| 2394 | |
| 2395 | /* new operations for NFSv4.2 */ |
| 2396 | [OP_ALLOCATE] = nfsd4_decode_fallocate, |
| 2397 | [OP_COPY] = nfsd4_decode_copy, |
| 2398 | [OP_COPY_NOTIFY] = nfsd4_decode_copy_notify, |
| 2399 | [OP_DEALLOCATE] = nfsd4_decode_fallocate, |
| 2400 | [OP_IO_ADVISE] = nfsd4_decode_notsupp, |
| 2401 | [OP_LAYOUTERROR] = nfsd4_decode_notsupp, |
| 2402 | [OP_LAYOUTSTATS] = nfsd4_decode_notsupp, |
| 2403 | [OP_OFFLOAD_CANCEL] = nfsd4_decode_offload_status, |
| 2404 | [OP_OFFLOAD_STATUS] = nfsd4_decode_offload_status, |
| 2405 | [OP_READ_PLUS] = nfsd4_decode_read, |
| 2406 | [OP_SEEK] = nfsd4_decode_seek, |
| 2407 | [OP_WRITE_SAME] = nfsd4_decode_notsupp, |
| 2408 | [OP_CLONE] = nfsd4_decode_clone, |
| 2409 | /* RFC 8276 extended atributes operations */ |
| 2410 | [OP_GETXATTR] = nfsd4_decode_getxattr, |
| 2411 | [OP_SETXATTR] = nfsd4_decode_setxattr, |
| 2412 | [OP_LISTXATTRS] = nfsd4_decode_listxattrs, |
| 2413 | [OP_REMOVEXATTR] = nfsd4_decode_removexattr, |
| 2414 | }; |
| 2415 | |
| 2416 | static inline bool |
| 2417 | nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op) |
| 2418 | { |
| 2419 | if (op->opnum < FIRST_NFS4_OP) |
| 2420 | return false; |
| 2421 | else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP) |
| 2422 | return false; |
| 2423 | else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP) |
| 2424 | return false; |
| 2425 | else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP) |
| 2426 | return false; |
| 2427 | return true; |
| 2428 | } |
| 2429 | |
| 2430 | static bool |
| 2431 | nfsd4_decode_compound(struct nfsd4_compoundargs *argp) |
| 2432 | { |
| 2433 | struct nfsd4_op *op; |
| 2434 | bool cachethis = false; |
| 2435 | int auth_slack= argp->rqstp->rq_auth_slack; |
| 2436 | int max_reply = auth_slack + 8; /* opcnt, status */ |
| 2437 | int readcount = 0; |
| 2438 | int readbytes = 0; |
| 2439 | __be32 *p; |
| 2440 | int i; |
| 2441 | |
| 2442 | if (xdr_stream_decode_u32(argp->xdr, &argp->taglen) < 0) |
| 2443 | return false; |
| 2444 | max_reply += XDR_UNIT; |
| 2445 | argp->tag = NULL; |
| 2446 | if (unlikely(argp->taglen)) { |
| 2447 | if (argp->taglen > NFSD4_MAX_TAGLEN) |
| 2448 | return false; |
| 2449 | p = xdr_inline_decode(argp->xdr, argp->taglen); |
| 2450 | if (!p) |
| 2451 | return false; |
| 2452 | argp->tag = svcxdr_savemem(argp, p, argp->taglen); |
| 2453 | if (!argp->tag) |
| 2454 | return false; |
| 2455 | max_reply += xdr_align_size(argp->taglen); |
| 2456 | } |
| 2457 | |
| 2458 | if (xdr_stream_decode_u32(argp->xdr, &argp->minorversion) < 0) |
| 2459 | return false; |
| 2460 | if (xdr_stream_decode_u32(argp->xdr, &argp->client_opcnt) < 0) |
| 2461 | return false; |
| 2462 | argp->opcnt = min_t(u32, argp->client_opcnt, |
| 2463 | NFSD_MAX_OPS_PER_COMPOUND); |
| 2464 | |
| 2465 | if (argp->opcnt > ARRAY_SIZE(argp->iops)) { |
| 2466 | argp->ops = vcalloc(argp->opcnt, sizeof(*argp->ops)); |
| 2467 | if (!argp->ops) { |
| 2468 | argp->ops = argp->iops; |
| 2469 | return false; |
| 2470 | } |
| 2471 | } |
| 2472 | |
| 2473 | if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION) |
| 2474 | argp->opcnt = 0; |
| 2475 | |
| 2476 | for (i = 0; i < argp->opcnt; i++) { |
| 2477 | op = &argp->ops[i]; |
| 2478 | op->replay = NULL; |
| 2479 | |
| 2480 | if (xdr_stream_decode_u32(argp->xdr, &op->opnum) < 0) |
| 2481 | return false; |
| 2482 | if (nfsd4_opnum_in_range(argp, op)) { |
| 2483 | op->status = nfsd4_dec_ops[op->opnum](argp, &op->u); |
| 2484 | if (op->status != nfs_ok) |
| 2485 | trace_nfsd_compound_decode_err(argp->rqstp, |
| 2486 | argp->opcnt, i, |
| 2487 | op->opnum, |
| 2488 | op->status); |
| 2489 | } else { |
| 2490 | op->opnum = OP_ILLEGAL; |
| 2491 | op->status = nfserr_op_illegal; |
| 2492 | } |
| 2493 | op->opdesc = OPDESC(op); |
| 2494 | /* |
| 2495 | * We'll try to cache the result in the DRC if any one |
| 2496 | * op in the compound wants to be cached: |
| 2497 | */ |
| 2498 | cachethis |= nfsd4_cache_this_op(op); |
| 2499 | |
| 2500 | if (op->opnum == OP_READ || op->opnum == OP_READ_PLUS) { |
| 2501 | readcount++; |
| 2502 | readbytes += nfsd4_max_reply(argp->rqstp, op); |
| 2503 | } else |
| 2504 | max_reply += nfsd4_max_reply(argp->rqstp, op); |
| 2505 | /* |
| 2506 | * OP_LOCK and OP_LOCKT may return a conflicting lock. |
| 2507 | * (Special case because it will just skip encoding this |
| 2508 | * if it runs out of xdr buffer space, and it is the only |
| 2509 | * operation that behaves this way.) |
| 2510 | */ |
| 2511 | if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT) |
| 2512 | max_reply += NFS4_OPAQUE_LIMIT; |
| 2513 | |
| 2514 | if (op->status) { |
| 2515 | argp->opcnt = i+1; |
| 2516 | break; |
| 2517 | } |
| 2518 | } |
| 2519 | /* Sessions make the DRC unnecessary: */ |
| 2520 | if (argp->minorversion) |
| 2521 | cachethis = false; |
| 2522 | svc_reserve(argp->rqstp, max_reply + readbytes); |
| 2523 | argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; |
| 2524 | |
| 2525 | if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack) |
| 2526 | __clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags); |
| 2527 | |
| 2528 | return true; |
| 2529 | } |
| 2530 | |
| 2531 | static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode, |
| 2532 | struct svc_export *exp) |
| 2533 | { |
| 2534 | if (exp->ex_flags & NFSEXP_V4ROOT) { |
| 2535 | *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time)); |
| 2536 | *p++ = 0; |
| 2537 | } else |
| 2538 | p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode)); |
| 2539 | return p; |
| 2540 | } |
| 2541 | |
| 2542 | /* |
| 2543 | * ctime (in NFSv4, time_metadata) is not writeable, and the client |
| 2544 | * doesn't really care what resolution could theoretically be stored by |
| 2545 | * the filesystem. |
| 2546 | * |
| 2547 | * The client cares how close together changes can be while still |
| 2548 | * guaranteeing ctime changes. For most filesystems (which have |
| 2549 | * timestamps with nanosecond fields) that is limited by the resolution |
| 2550 | * of the time returned from current_time() (which I'm assuming to be |
| 2551 | * 1/HZ). |
| 2552 | */ |
| 2553 | static __be32 *encode_time_delta(__be32 *p, struct inode *inode) |
| 2554 | { |
| 2555 | struct timespec64 ts; |
| 2556 | u32 ns; |
| 2557 | |
| 2558 | ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran); |
| 2559 | ts = ns_to_timespec64(ns); |
| 2560 | |
| 2561 | p = xdr_encode_hyper(p, ts.tv_sec); |
| 2562 | *p++ = cpu_to_be32(ts.tv_nsec); |
| 2563 | |
| 2564 | return p; |
| 2565 | } |
| 2566 | |
| 2567 | static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c) |
| 2568 | { |
| 2569 | *p++ = cpu_to_be32(c->atomic); |
| 2570 | p = xdr_encode_hyper(p, c->before_change); |
| 2571 | p = xdr_encode_hyper(p, c->after_change); |
| 2572 | return p; |
| 2573 | } |
| 2574 | |
| 2575 | /* Encode as an array of strings the string given with components |
| 2576 | * separated @sep, escaped with esc_enter and esc_exit. |
| 2577 | */ |
| 2578 | static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep, |
| 2579 | char *components, char esc_enter, |
| 2580 | char esc_exit) |
| 2581 | { |
| 2582 | __be32 *p; |
| 2583 | __be32 pathlen; |
| 2584 | int pathlen_offset; |
| 2585 | int strlen, count=0; |
| 2586 | char *str, *end, *next; |
| 2587 | |
| 2588 | dprintk("nfsd4_encode_components(%s)\n", components); |
| 2589 | |
| 2590 | pathlen_offset = xdr->buf->len; |
| 2591 | p = xdr_reserve_space(xdr, 4); |
| 2592 | if (!p) |
| 2593 | return nfserr_resource; |
| 2594 | p++; /* We will fill this in with @count later */ |
| 2595 | |
| 2596 | end = str = components; |
| 2597 | while (*end) { |
| 2598 | bool found_esc = false; |
| 2599 | |
| 2600 | /* try to parse as esc_start, ..., esc_end, sep */ |
| 2601 | if (*str == esc_enter) { |
| 2602 | for (; *end && (*end != esc_exit); end++) |
| 2603 | /* find esc_exit or end of string */; |
| 2604 | next = end + 1; |
| 2605 | if (*end && (!*next || *next == sep)) { |
| 2606 | str++; |
| 2607 | found_esc = true; |
| 2608 | } |
| 2609 | } |
| 2610 | |
| 2611 | if (!found_esc) |
| 2612 | for (; *end && (*end != sep); end++) |
| 2613 | /* find sep or end of string */; |
| 2614 | |
| 2615 | strlen = end - str; |
| 2616 | if (strlen) { |
| 2617 | p = xdr_reserve_space(xdr, strlen + 4); |
| 2618 | if (!p) |
| 2619 | return nfserr_resource; |
| 2620 | p = xdr_encode_opaque(p, str, strlen); |
| 2621 | count++; |
| 2622 | } |
| 2623 | else |
| 2624 | end++; |
| 2625 | if (found_esc) |
| 2626 | end = next; |
| 2627 | |
| 2628 | str = end; |
| 2629 | } |
| 2630 | pathlen = htonl(count); |
| 2631 | write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4); |
| 2632 | return 0; |
| 2633 | } |
| 2634 | |
| 2635 | /* Encode as an array of strings the string given with components |
| 2636 | * separated @sep. |
| 2637 | */ |
| 2638 | static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep, |
| 2639 | char *components) |
| 2640 | { |
| 2641 | return nfsd4_encode_components_esc(xdr, sep, components, 0, 0); |
| 2642 | } |
| 2643 | |
| 2644 | /* |
| 2645 | * encode a location element of a fs_locations structure |
| 2646 | */ |
| 2647 | static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr, |
| 2648 | struct nfsd4_fs_location *location) |
| 2649 | { |
| 2650 | __be32 status; |
| 2651 | |
| 2652 | status = nfsd4_encode_components_esc(xdr, ':', location->hosts, |
| 2653 | '[', ']'); |
| 2654 | if (status) |
| 2655 | return status; |
| 2656 | status = nfsd4_encode_components(xdr, '/', location->path); |
| 2657 | if (status) |
| 2658 | return status; |
| 2659 | return 0; |
| 2660 | } |
| 2661 | |
| 2662 | /* |
| 2663 | * Encode a path in RFC3530 'pathname4' format |
| 2664 | */ |
| 2665 | static __be32 nfsd4_encode_path(struct xdr_stream *xdr, |
| 2666 | const struct path *root, |
| 2667 | const struct path *path) |
| 2668 | { |
| 2669 | struct path cur = *path; |
| 2670 | __be32 *p; |
| 2671 | struct dentry **components = NULL; |
| 2672 | unsigned int ncomponents = 0; |
| 2673 | __be32 err = nfserr_jukebox; |
| 2674 | |
| 2675 | dprintk("nfsd4_encode_components("); |
| 2676 | |
| 2677 | path_get(&cur); |
| 2678 | /* First walk the path up to the nfsd root, and store the |
| 2679 | * dentries/path components in an array. |
| 2680 | */ |
| 2681 | for (;;) { |
| 2682 | if (path_equal(&cur, root)) |
| 2683 | break; |
| 2684 | if (cur.dentry == cur.mnt->mnt_root) { |
| 2685 | if (follow_up(&cur)) |
| 2686 | continue; |
| 2687 | goto out_free; |
| 2688 | } |
| 2689 | if ((ncomponents & 15) == 0) { |
| 2690 | struct dentry **new; |
| 2691 | new = krealloc(components, |
| 2692 | sizeof(*new) * (ncomponents + 16), |
| 2693 | GFP_KERNEL); |
| 2694 | if (!new) |
| 2695 | goto out_free; |
| 2696 | components = new; |
| 2697 | } |
| 2698 | components[ncomponents++] = cur.dentry; |
| 2699 | cur.dentry = dget_parent(cur.dentry); |
| 2700 | } |
| 2701 | err = nfserr_resource; |
| 2702 | p = xdr_reserve_space(xdr, 4); |
| 2703 | if (!p) |
| 2704 | goto out_free; |
| 2705 | *p++ = cpu_to_be32(ncomponents); |
| 2706 | |
| 2707 | while (ncomponents) { |
| 2708 | struct dentry *dentry = components[ncomponents - 1]; |
| 2709 | unsigned int len; |
| 2710 | |
| 2711 | spin_lock(&dentry->d_lock); |
| 2712 | len = dentry->d_name.len; |
| 2713 | p = xdr_reserve_space(xdr, len + 4); |
| 2714 | if (!p) { |
| 2715 | spin_unlock(&dentry->d_lock); |
| 2716 | goto out_free; |
| 2717 | } |
| 2718 | p = xdr_encode_opaque(p, dentry->d_name.name, len); |
| 2719 | dprintk("/%pd", dentry); |
| 2720 | spin_unlock(&dentry->d_lock); |
| 2721 | dput(dentry); |
| 2722 | ncomponents--; |
| 2723 | } |
| 2724 | |
| 2725 | err = 0; |
| 2726 | out_free: |
| 2727 | dprintk(")\n"); |
| 2728 | while (ncomponents) |
| 2729 | dput(components[--ncomponents]); |
| 2730 | kfree(components); |
| 2731 | path_put(&cur); |
| 2732 | return err; |
| 2733 | } |
| 2734 | |
| 2735 | static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr, |
| 2736 | struct svc_rqst *rqstp, const struct path *path) |
| 2737 | { |
| 2738 | struct svc_export *exp_ps; |
| 2739 | __be32 res; |
| 2740 | |
| 2741 | exp_ps = rqst_find_fsidzero_export(rqstp); |
| 2742 | if (IS_ERR(exp_ps)) |
| 2743 | return nfserrno(PTR_ERR(exp_ps)); |
| 2744 | res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path); |
| 2745 | exp_put(exp_ps); |
| 2746 | return res; |
| 2747 | } |
| 2748 | |
| 2749 | /* |
| 2750 | * encode a fs_locations structure |
| 2751 | */ |
| 2752 | static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr, |
| 2753 | struct svc_rqst *rqstp, struct svc_export *exp) |
| 2754 | { |
| 2755 | __be32 status; |
| 2756 | int i; |
| 2757 | __be32 *p; |
| 2758 | struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; |
| 2759 | |
| 2760 | status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path); |
| 2761 | if (status) |
| 2762 | return status; |
| 2763 | p = xdr_reserve_space(xdr, 4); |
| 2764 | if (!p) |
| 2765 | return nfserr_resource; |
| 2766 | *p++ = cpu_to_be32(fslocs->locations_count); |
| 2767 | for (i=0; i<fslocs->locations_count; i++) { |
| 2768 | status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]); |
| 2769 | if (status) |
| 2770 | return status; |
| 2771 | } |
| 2772 | return 0; |
| 2773 | } |
| 2774 | |
| 2775 | static u32 nfs4_file_type(umode_t mode) |
| 2776 | { |
| 2777 | switch (mode & S_IFMT) { |
| 2778 | case S_IFIFO: return NF4FIFO; |
| 2779 | case S_IFCHR: return NF4CHR; |
| 2780 | case S_IFDIR: return NF4DIR; |
| 2781 | case S_IFBLK: return NF4BLK; |
| 2782 | case S_IFLNK: return NF4LNK; |
| 2783 | case S_IFREG: return NF4REG; |
| 2784 | case S_IFSOCK: return NF4SOCK; |
| 2785 | default: return NF4BAD; |
| 2786 | } |
| 2787 | } |
| 2788 | |
| 2789 | static inline __be32 |
| 2790 | nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp, |
| 2791 | struct nfs4_ace *ace) |
| 2792 | { |
| 2793 | if (ace->whotype != NFS4_ACL_WHO_NAMED) |
| 2794 | return nfs4_acl_write_who(xdr, ace->whotype); |
| 2795 | else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) |
| 2796 | return nfsd4_encode_group(xdr, rqstp, ace->who_gid); |
| 2797 | else |
| 2798 | return nfsd4_encode_user(xdr, rqstp, ace->who_uid); |
| 2799 | } |
| 2800 | |
| 2801 | static inline __be32 |
| 2802 | nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types) |
| 2803 | { |
| 2804 | __be32 *p; |
| 2805 | unsigned long i = hweight_long(layout_types); |
| 2806 | |
| 2807 | p = xdr_reserve_space(xdr, 4 + 4 * i); |
| 2808 | if (!p) |
| 2809 | return nfserr_resource; |
| 2810 | |
| 2811 | *p++ = cpu_to_be32(i); |
| 2812 | |
| 2813 | for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i) |
| 2814 | if (layout_types & (1 << i)) |
| 2815 | *p++ = cpu_to_be32(i); |
| 2816 | |
| 2817 | return 0; |
| 2818 | } |
| 2819 | |
| 2820 | #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ |
| 2821 | FATTR4_WORD0_RDATTR_ERROR) |
| 2822 | #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID |
| 2823 | #define WORD2_ABSENT_FS_ATTRS 0 |
| 2824 | |
| 2825 | #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
| 2826 | static inline __be32 |
| 2827 | nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, |
| 2828 | void *context, int len) |
| 2829 | { |
| 2830 | __be32 *p; |
| 2831 | |
| 2832 | p = xdr_reserve_space(xdr, len + 4 + 4 + 4); |
| 2833 | if (!p) |
| 2834 | return nfserr_resource; |
| 2835 | |
| 2836 | /* |
| 2837 | * For now we use a 0 here to indicate the null translation; in |
| 2838 | * the future we may place a call to translation code here. |
| 2839 | */ |
| 2840 | *p++ = cpu_to_be32(0); /* lfs */ |
| 2841 | *p++ = cpu_to_be32(0); /* pi */ |
| 2842 | p = xdr_encode_opaque(p, context, len); |
| 2843 | return 0; |
| 2844 | } |
| 2845 | #else |
| 2846 | static inline __be32 |
| 2847 | nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, |
| 2848 | void *context, int len) |
| 2849 | { return 0; } |
| 2850 | #endif |
| 2851 | |
| 2852 | static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err) |
| 2853 | { |
| 2854 | /* As per referral draft: */ |
| 2855 | if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || |
| 2856 | *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { |
| 2857 | if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || |
| 2858 | *bmval0 & FATTR4_WORD0_FS_LOCATIONS) |
| 2859 | *rdattr_err = NFSERR_MOVED; |
| 2860 | else |
| 2861 | return nfserr_moved; |
| 2862 | } |
| 2863 | *bmval0 &= WORD0_ABSENT_FS_ATTRS; |
| 2864 | *bmval1 &= WORD1_ABSENT_FS_ATTRS; |
| 2865 | *bmval2 &= WORD2_ABSENT_FS_ATTRS; |
| 2866 | return 0; |
| 2867 | } |
| 2868 | |
| 2869 | |
| 2870 | static int nfsd4_get_mounted_on_ino(struct svc_export *exp, u64 *pino) |
| 2871 | { |
| 2872 | struct path path = exp->ex_path; |
| 2873 | struct kstat stat; |
| 2874 | int err; |
| 2875 | |
| 2876 | path_get(&path); |
| 2877 | while (follow_up(&path)) { |
| 2878 | if (path.dentry != path.mnt->mnt_root) |
| 2879 | break; |
| 2880 | } |
| 2881 | err = vfs_getattr(&path, &stat, STATX_INO, AT_STATX_SYNC_AS_STAT); |
| 2882 | path_put(&path); |
| 2883 | if (!err) |
| 2884 | *pino = stat.ino; |
| 2885 | return err; |
| 2886 | } |
| 2887 | |
| 2888 | static __be32 |
| 2889 | nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2) |
| 2890 | { |
| 2891 | __be32 *p; |
| 2892 | |
| 2893 | if (bmval2) { |
| 2894 | p = xdr_reserve_space(xdr, 16); |
| 2895 | if (!p) |
| 2896 | goto out_resource; |
| 2897 | *p++ = cpu_to_be32(3); |
| 2898 | *p++ = cpu_to_be32(bmval0); |
| 2899 | *p++ = cpu_to_be32(bmval1); |
| 2900 | *p++ = cpu_to_be32(bmval2); |
| 2901 | } else if (bmval1) { |
| 2902 | p = xdr_reserve_space(xdr, 12); |
| 2903 | if (!p) |
| 2904 | goto out_resource; |
| 2905 | *p++ = cpu_to_be32(2); |
| 2906 | *p++ = cpu_to_be32(bmval0); |
| 2907 | *p++ = cpu_to_be32(bmval1); |
| 2908 | } else { |
| 2909 | p = xdr_reserve_space(xdr, 8); |
| 2910 | if (!p) |
| 2911 | goto out_resource; |
| 2912 | *p++ = cpu_to_be32(1); |
| 2913 | *p++ = cpu_to_be32(bmval0); |
| 2914 | } |
| 2915 | |
| 2916 | return 0; |
| 2917 | out_resource: |
| 2918 | return nfserr_resource; |
| 2919 | } |
| 2920 | |
| 2921 | /* |
| 2922 | * Note: @fhp can be NULL; in this case, we might have to compose the filehandle |
| 2923 | * ourselves. |
| 2924 | */ |
| 2925 | static __be32 |
| 2926 | nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, |
| 2927 | struct svc_export *exp, |
| 2928 | struct dentry *dentry, u32 *bmval, |
| 2929 | struct svc_rqst *rqstp, int ignore_crossmnt) |
| 2930 | { |
| 2931 | u32 bmval0 = bmval[0]; |
| 2932 | u32 bmval1 = bmval[1]; |
| 2933 | u32 bmval2 = bmval[2]; |
| 2934 | struct kstat stat; |
| 2935 | struct svc_fh *tempfh = NULL; |
| 2936 | struct kstatfs statfs; |
| 2937 | __be32 *p, *attrlen_p; |
| 2938 | int starting_len = xdr->buf->len; |
| 2939 | int attrlen_offset; |
| 2940 | u32 dummy; |
| 2941 | u64 dummy64; |
| 2942 | u32 rdattr_err = 0; |
| 2943 | __be32 status; |
| 2944 | int err; |
| 2945 | struct nfs4_acl *acl = NULL; |
| 2946 | #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
| 2947 | void *context = NULL; |
| 2948 | int contextlen; |
| 2949 | #endif |
| 2950 | bool contextsupport = false; |
| 2951 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
| 2952 | u32 minorversion = resp->cstate.minorversion; |
| 2953 | struct path path = { |
| 2954 | .mnt = exp->ex_path.mnt, |
| 2955 | .dentry = dentry, |
| 2956 | }; |
| 2957 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
| 2958 | |
| 2959 | BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); |
| 2960 | BUG_ON(!nfsd_attrs_supported(minorversion, bmval)); |
| 2961 | |
| 2962 | if (exp->ex_fslocs.migrated) { |
| 2963 | status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err); |
| 2964 | if (status) |
| 2965 | goto out; |
| 2966 | } |
| 2967 | |
| 2968 | err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); |
| 2969 | if (err) |
| 2970 | goto out_nfserr; |
| 2971 | if (!(stat.result_mask & STATX_BTIME)) |
| 2972 | /* underlying FS does not offer btime so we can't share it */ |
| 2973 | bmval1 &= ~FATTR4_WORD1_TIME_CREATE; |
| 2974 | if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE | |
| 2975 | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) || |
| 2976 | (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | |
| 2977 | FATTR4_WORD1_SPACE_TOTAL))) { |
| 2978 | err = vfs_statfs(&path, &statfs); |
| 2979 | if (err) |
| 2980 | goto out_nfserr; |
| 2981 | } |
| 2982 | if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { |
| 2983 | tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); |
| 2984 | status = nfserr_jukebox; |
| 2985 | if (!tempfh) |
| 2986 | goto out; |
| 2987 | fh_init(tempfh, NFS4_FHSIZE); |
| 2988 | status = fh_compose(tempfh, exp, dentry, NULL); |
| 2989 | if (status) |
| 2990 | goto out; |
| 2991 | fhp = tempfh; |
| 2992 | } |
| 2993 | if (bmval0 & FATTR4_WORD0_ACL) { |
| 2994 | err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); |
| 2995 | if (err == -EOPNOTSUPP) |
| 2996 | bmval0 &= ~FATTR4_WORD0_ACL; |
| 2997 | else if (err == -EINVAL) { |
| 2998 | status = nfserr_attrnotsupp; |
| 2999 | goto out; |
| 3000 | } else if (err != 0) |
| 3001 | goto out_nfserr; |
| 3002 | } |
| 3003 | |
| 3004 | #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
| 3005 | if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) || |
| 3006 | bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { |
| 3007 | if (exp->ex_flags & NFSEXP_SECURITY_LABEL) |
| 3008 | err = security_inode_getsecctx(d_inode(dentry), |
| 3009 | &context, &contextlen); |
| 3010 | else |
| 3011 | err = -EOPNOTSUPP; |
| 3012 | contextsupport = (err == 0); |
| 3013 | if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { |
| 3014 | if (err == -EOPNOTSUPP) |
| 3015 | bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL; |
| 3016 | else if (err) |
| 3017 | goto out_nfserr; |
| 3018 | } |
| 3019 | } |
| 3020 | #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ |
| 3021 | |
| 3022 | status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2); |
| 3023 | if (status) |
| 3024 | goto out; |
| 3025 | |
| 3026 | attrlen_offset = xdr->buf->len; |
| 3027 | attrlen_p = xdr_reserve_space(xdr, XDR_UNIT); |
| 3028 | if (!attrlen_p) |
| 3029 | goto out_resource; |
| 3030 | |
| 3031 | if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { |
| 3032 | u32 supp[3]; |
| 3033 | |
| 3034 | memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp)); |
| 3035 | |
| 3036 | if (!IS_POSIXACL(dentry->d_inode)) |
| 3037 | supp[0] &= ~FATTR4_WORD0_ACL; |
| 3038 | if (!contextsupport) |
| 3039 | supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL; |
| 3040 | if (!supp[2]) { |
| 3041 | p = xdr_reserve_space(xdr, 12); |
| 3042 | if (!p) |
| 3043 | goto out_resource; |
| 3044 | *p++ = cpu_to_be32(2); |
| 3045 | *p++ = cpu_to_be32(supp[0]); |
| 3046 | *p++ = cpu_to_be32(supp[1]); |
| 3047 | } else { |
| 3048 | p = xdr_reserve_space(xdr, 16); |
| 3049 | if (!p) |
| 3050 | goto out_resource; |
| 3051 | *p++ = cpu_to_be32(3); |
| 3052 | *p++ = cpu_to_be32(supp[0]); |
| 3053 | *p++ = cpu_to_be32(supp[1]); |
| 3054 | *p++ = cpu_to_be32(supp[2]); |
| 3055 | } |
| 3056 | } |
| 3057 | if (bmval0 & FATTR4_WORD0_TYPE) { |
| 3058 | p = xdr_reserve_space(xdr, 4); |
| 3059 | if (!p) |
| 3060 | goto out_resource; |
| 3061 | dummy = nfs4_file_type(stat.mode); |
| 3062 | if (dummy == NF4BAD) { |
| 3063 | status = nfserr_serverfault; |
| 3064 | goto out; |
| 3065 | } |
| 3066 | *p++ = cpu_to_be32(dummy); |
| 3067 | } |
| 3068 | if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { |
| 3069 | p = xdr_reserve_space(xdr, 4); |
| 3070 | if (!p) |
| 3071 | goto out_resource; |
| 3072 | if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) |
| 3073 | *p++ = cpu_to_be32(NFS4_FH_PERSISTENT); |
| 3074 | else |
| 3075 | *p++ = cpu_to_be32(NFS4_FH_PERSISTENT| |
| 3076 | NFS4_FH_VOL_RENAME); |
| 3077 | } |
| 3078 | if (bmval0 & FATTR4_WORD0_CHANGE) { |
| 3079 | p = xdr_reserve_space(xdr, 8); |
| 3080 | if (!p) |
| 3081 | goto out_resource; |
| 3082 | p = encode_change(p, &stat, d_inode(dentry), exp); |
| 3083 | } |
| 3084 | if (bmval0 & FATTR4_WORD0_SIZE) { |
| 3085 | p = xdr_reserve_space(xdr, 8); |
| 3086 | if (!p) |
| 3087 | goto out_resource; |
| 3088 | p = xdr_encode_hyper(p, stat.size); |
| 3089 | } |
| 3090 | if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { |
| 3091 | p = xdr_reserve_space(xdr, 4); |
| 3092 | if (!p) |
| 3093 | goto out_resource; |
| 3094 | *p++ = cpu_to_be32(1); |
| 3095 | } |
| 3096 | if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { |
| 3097 | p = xdr_reserve_space(xdr, 4); |
| 3098 | if (!p) |
| 3099 | goto out_resource; |
| 3100 | *p++ = cpu_to_be32(1); |
| 3101 | } |
| 3102 | if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { |
| 3103 | p = xdr_reserve_space(xdr, 4); |
| 3104 | if (!p) |
| 3105 | goto out_resource; |
| 3106 | *p++ = cpu_to_be32(0); |
| 3107 | } |
| 3108 | if (bmval0 & FATTR4_WORD0_FSID) { |
| 3109 | p = xdr_reserve_space(xdr, 16); |
| 3110 | if (!p) |
| 3111 | goto out_resource; |
| 3112 | if (exp->ex_fslocs.migrated) { |
| 3113 | p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR); |
| 3114 | p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR); |
| 3115 | } else switch(fsid_source(fhp)) { |
| 3116 | case FSIDSOURCE_FSID: |
| 3117 | p = xdr_encode_hyper(p, (u64)exp->ex_fsid); |
| 3118 | p = xdr_encode_hyper(p, (u64)0); |
| 3119 | break; |
| 3120 | case FSIDSOURCE_DEV: |
| 3121 | *p++ = cpu_to_be32(0); |
| 3122 | *p++ = cpu_to_be32(MAJOR(stat.dev)); |
| 3123 | *p++ = cpu_to_be32(0); |
| 3124 | *p++ = cpu_to_be32(MINOR(stat.dev)); |
| 3125 | break; |
| 3126 | case FSIDSOURCE_UUID: |
| 3127 | p = xdr_encode_opaque_fixed(p, exp->ex_uuid, |
| 3128 | EX_UUID_LEN); |
| 3129 | break; |
| 3130 | } |
| 3131 | } |
| 3132 | if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { |
| 3133 | p = xdr_reserve_space(xdr, 4); |
| 3134 | if (!p) |
| 3135 | goto out_resource; |
| 3136 | *p++ = cpu_to_be32(0); |
| 3137 | } |
| 3138 | if (bmval0 & FATTR4_WORD0_LEASE_TIME) { |
| 3139 | p = xdr_reserve_space(xdr, 4); |
| 3140 | if (!p) |
| 3141 | goto out_resource; |
| 3142 | *p++ = cpu_to_be32(nn->nfsd4_lease); |
| 3143 | } |
| 3144 | if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { |
| 3145 | p = xdr_reserve_space(xdr, 4); |
| 3146 | if (!p) |
| 3147 | goto out_resource; |
| 3148 | *p++ = cpu_to_be32(rdattr_err); |
| 3149 | } |
| 3150 | if (bmval0 & FATTR4_WORD0_ACL) { |
| 3151 | struct nfs4_ace *ace; |
| 3152 | |
| 3153 | if (acl == NULL) { |
| 3154 | p = xdr_reserve_space(xdr, 4); |
| 3155 | if (!p) |
| 3156 | goto out_resource; |
| 3157 | |
| 3158 | *p++ = cpu_to_be32(0); |
| 3159 | goto out_acl; |
| 3160 | } |
| 3161 | p = xdr_reserve_space(xdr, 4); |
| 3162 | if (!p) |
| 3163 | goto out_resource; |
| 3164 | *p++ = cpu_to_be32(acl->naces); |
| 3165 | |
| 3166 | for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { |
| 3167 | p = xdr_reserve_space(xdr, 4*3); |
| 3168 | if (!p) |
| 3169 | goto out_resource; |
| 3170 | *p++ = cpu_to_be32(ace->type); |
| 3171 | *p++ = cpu_to_be32(ace->flag); |
| 3172 | *p++ = cpu_to_be32(ace->access_mask & |
| 3173 | NFS4_ACE_MASK_ALL); |
| 3174 | status = nfsd4_encode_aclname(xdr, rqstp, ace); |
| 3175 | if (status) |
| 3176 | goto out; |
| 3177 | } |
| 3178 | } |
| 3179 | out_acl: |
| 3180 | if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { |
| 3181 | p = xdr_reserve_space(xdr, 4); |
| 3182 | if (!p) |
| 3183 | goto out_resource; |
| 3184 | *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ? |
| 3185 | ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); |
| 3186 | } |
| 3187 | if (bmval0 & FATTR4_WORD0_CANSETTIME) { |
| 3188 | p = xdr_reserve_space(xdr, 4); |
| 3189 | if (!p) |
| 3190 | goto out_resource; |
| 3191 | *p++ = cpu_to_be32(1); |
| 3192 | } |
| 3193 | if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { |
| 3194 | p = xdr_reserve_space(xdr, 4); |
| 3195 | if (!p) |
| 3196 | goto out_resource; |
| 3197 | *p++ = cpu_to_be32(0); |
| 3198 | } |
| 3199 | if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { |
| 3200 | p = xdr_reserve_space(xdr, 4); |
| 3201 | if (!p) |
| 3202 | goto out_resource; |
| 3203 | *p++ = cpu_to_be32(1); |
| 3204 | } |
| 3205 | if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { |
| 3206 | p = xdr_reserve_space(xdr, 4); |
| 3207 | if (!p) |
| 3208 | goto out_resource; |
| 3209 | *p++ = cpu_to_be32(1); |
| 3210 | } |
| 3211 | if (bmval0 & FATTR4_WORD0_FILEHANDLE) { |
| 3212 | p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4); |
| 3213 | if (!p) |
| 3214 | goto out_resource; |
| 3215 | p = xdr_encode_opaque(p, &fhp->fh_handle.fh_raw, |
| 3216 | fhp->fh_handle.fh_size); |
| 3217 | } |
| 3218 | if (bmval0 & FATTR4_WORD0_FILEID) { |
| 3219 | p = xdr_reserve_space(xdr, 8); |
| 3220 | if (!p) |
| 3221 | goto out_resource; |
| 3222 | p = xdr_encode_hyper(p, stat.ino); |
| 3223 | } |
| 3224 | if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { |
| 3225 | p = xdr_reserve_space(xdr, 8); |
| 3226 | if (!p) |
| 3227 | goto out_resource; |
| 3228 | p = xdr_encode_hyper(p, (u64) statfs.f_ffree); |
| 3229 | } |
| 3230 | if (bmval0 & FATTR4_WORD0_FILES_FREE) { |
| 3231 | p = xdr_reserve_space(xdr, 8); |
| 3232 | if (!p) |
| 3233 | goto out_resource; |
| 3234 | p = xdr_encode_hyper(p, (u64) statfs.f_ffree); |
| 3235 | } |
| 3236 | if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { |
| 3237 | p = xdr_reserve_space(xdr, 8); |
| 3238 | if (!p) |
| 3239 | goto out_resource; |
| 3240 | p = xdr_encode_hyper(p, (u64) statfs.f_files); |
| 3241 | } |
| 3242 | if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { |
| 3243 | status = nfsd4_encode_fs_locations(xdr, rqstp, exp); |
| 3244 | if (status) |
| 3245 | goto out; |
| 3246 | } |
| 3247 | if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { |
| 3248 | p = xdr_reserve_space(xdr, 4); |
| 3249 | if (!p) |
| 3250 | goto out_resource; |
| 3251 | *p++ = cpu_to_be32(1); |
| 3252 | } |
| 3253 | if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { |
| 3254 | p = xdr_reserve_space(xdr, 8); |
| 3255 | if (!p) |
| 3256 | goto out_resource; |
| 3257 | p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes); |
| 3258 | } |
| 3259 | if (bmval0 & FATTR4_WORD0_MAXLINK) { |
| 3260 | p = xdr_reserve_space(xdr, 4); |
| 3261 | if (!p) |
| 3262 | goto out_resource; |
| 3263 | *p++ = cpu_to_be32(255); |
| 3264 | } |
| 3265 | if (bmval0 & FATTR4_WORD0_MAXNAME) { |
| 3266 | p = xdr_reserve_space(xdr, 4); |
| 3267 | if (!p) |
| 3268 | goto out_resource; |
| 3269 | *p++ = cpu_to_be32(statfs.f_namelen); |
| 3270 | } |
| 3271 | if (bmval0 & FATTR4_WORD0_MAXREAD) { |
| 3272 | p = xdr_reserve_space(xdr, 8); |
| 3273 | if (!p) |
| 3274 | goto out_resource; |
| 3275 | p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); |
| 3276 | } |
| 3277 | if (bmval0 & FATTR4_WORD0_MAXWRITE) { |
| 3278 | p = xdr_reserve_space(xdr, 8); |
| 3279 | if (!p) |
| 3280 | goto out_resource; |
| 3281 | p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); |
| 3282 | } |
| 3283 | if (bmval1 & FATTR4_WORD1_MODE) { |
| 3284 | p = xdr_reserve_space(xdr, 4); |
| 3285 | if (!p) |
| 3286 | goto out_resource; |
| 3287 | *p++ = cpu_to_be32(stat.mode & S_IALLUGO); |
| 3288 | } |
| 3289 | if (bmval1 & FATTR4_WORD1_NO_TRUNC) { |
| 3290 | p = xdr_reserve_space(xdr, 4); |
| 3291 | if (!p) |
| 3292 | goto out_resource; |
| 3293 | *p++ = cpu_to_be32(1); |
| 3294 | } |
| 3295 | if (bmval1 & FATTR4_WORD1_NUMLINKS) { |
| 3296 | p = xdr_reserve_space(xdr, 4); |
| 3297 | if (!p) |
| 3298 | goto out_resource; |
| 3299 | *p++ = cpu_to_be32(stat.nlink); |
| 3300 | } |
| 3301 | if (bmval1 & FATTR4_WORD1_OWNER) { |
| 3302 | status = nfsd4_encode_user(xdr, rqstp, stat.uid); |
| 3303 | if (status) |
| 3304 | goto out; |
| 3305 | } |
| 3306 | if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { |
| 3307 | status = nfsd4_encode_group(xdr, rqstp, stat.gid); |
| 3308 | if (status) |
| 3309 | goto out; |
| 3310 | } |
| 3311 | if (bmval1 & FATTR4_WORD1_RAWDEV) { |
| 3312 | p = xdr_reserve_space(xdr, 8); |
| 3313 | if (!p) |
| 3314 | goto out_resource; |
| 3315 | *p++ = cpu_to_be32((u32) MAJOR(stat.rdev)); |
| 3316 | *p++ = cpu_to_be32((u32) MINOR(stat.rdev)); |
| 3317 | } |
| 3318 | if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { |
| 3319 | p = xdr_reserve_space(xdr, 8); |
| 3320 | if (!p) |
| 3321 | goto out_resource; |
| 3322 | dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; |
| 3323 | p = xdr_encode_hyper(p, dummy64); |
| 3324 | } |
| 3325 | if (bmval1 & FATTR4_WORD1_SPACE_FREE) { |
| 3326 | p = xdr_reserve_space(xdr, 8); |
| 3327 | if (!p) |
| 3328 | goto out_resource; |
| 3329 | dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; |
| 3330 | p = xdr_encode_hyper(p, dummy64); |
| 3331 | } |
| 3332 | if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { |
| 3333 | p = xdr_reserve_space(xdr, 8); |
| 3334 | if (!p) |
| 3335 | goto out_resource; |
| 3336 | dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; |
| 3337 | p = xdr_encode_hyper(p, dummy64); |
| 3338 | } |
| 3339 | if (bmval1 & FATTR4_WORD1_SPACE_USED) { |
| 3340 | p = xdr_reserve_space(xdr, 8); |
| 3341 | if (!p) |
| 3342 | goto out_resource; |
| 3343 | dummy64 = (u64)stat.blocks << 9; |
| 3344 | p = xdr_encode_hyper(p, dummy64); |
| 3345 | } |
| 3346 | if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { |
| 3347 | p = xdr_reserve_space(xdr, 12); |
| 3348 | if (!p) |
| 3349 | goto out_resource; |
| 3350 | p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec); |
| 3351 | *p++ = cpu_to_be32(stat.atime.tv_nsec); |
| 3352 | } |
| 3353 | if (bmval1 & FATTR4_WORD1_TIME_DELTA) { |
| 3354 | p = xdr_reserve_space(xdr, 12); |
| 3355 | if (!p) |
| 3356 | goto out_resource; |
| 3357 | p = encode_time_delta(p, d_inode(dentry)); |
| 3358 | } |
| 3359 | if (bmval1 & FATTR4_WORD1_TIME_METADATA) { |
| 3360 | p = xdr_reserve_space(xdr, 12); |
| 3361 | if (!p) |
| 3362 | goto out_resource; |
| 3363 | p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec); |
| 3364 | *p++ = cpu_to_be32(stat.ctime.tv_nsec); |
| 3365 | } |
| 3366 | if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { |
| 3367 | p = xdr_reserve_space(xdr, 12); |
| 3368 | if (!p) |
| 3369 | goto out_resource; |
| 3370 | p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec); |
| 3371 | *p++ = cpu_to_be32(stat.mtime.tv_nsec); |
| 3372 | } |
| 3373 | if (bmval1 & FATTR4_WORD1_TIME_CREATE) { |
| 3374 | p = xdr_reserve_space(xdr, 12); |
| 3375 | if (!p) |
| 3376 | goto out_resource; |
| 3377 | p = xdr_encode_hyper(p, (s64)stat.btime.tv_sec); |
| 3378 | *p++ = cpu_to_be32(stat.btime.tv_nsec); |
| 3379 | } |
| 3380 | if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { |
| 3381 | u64 ino = stat.ino; |
| 3382 | |
| 3383 | p = xdr_reserve_space(xdr, 8); |
| 3384 | if (!p) |
| 3385 | goto out_resource; |
| 3386 | /* |
| 3387 | * Get ino of mountpoint in parent filesystem, if not ignoring |
| 3388 | * crossmount and this is the root of a cross-mounted |
| 3389 | * filesystem. |
| 3390 | */ |
| 3391 | if (ignore_crossmnt == 0 && |
| 3392 | dentry == exp->ex_path.mnt->mnt_root) { |
| 3393 | err = nfsd4_get_mounted_on_ino(exp, &ino); |
| 3394 | if (err) |
| 3395 | goto out_nfserr; |
| 3396 | } |
| 3397 | p = xdr_encode_hyper(p, ino); |
| 3398 | } |
| 3399 | #ifdef CONFIG_NFSD_PNFS |
| 3400 | if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) { |
| 3401 | status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types); |
| 3402 | if (status) |
| 3403 | goto out; |
| 3404 | } |
| 3405 | |
| 3406 | if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) { |
| 3407 | status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types); |
| 3408 | if (status) |
| 3409 | goto out; |
| 3410 | } |
| 3411 | |
| 3412 | if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) { |
| 3413 | p = xdr_reserve_space(xdr, 4); |
| 3414 | if (!p) |
| 3415 | goto out_resource; |
| 3416 | *p++ = cpu_to_be32(stat.blksize); |
| 3417 | } |
| 3418 | #endif /* CONFIG_NFSD_PNFS */ |
| 3419 | if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { |
| 3420 | u32 supp[3]; |
| 3421 | |
| 3422 | memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp)); |
| 3423 | supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0; |
| 3424 | supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1; |
| 3425 | supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2; |
| 3426 | |
| 3427 | status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]); |
| 3428 | if (status) |
| 3429 | goto out; |
| 3430 | } |
| 3431 | |
| 3432 | #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
| 3433 | if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { |
| 3434 | status = nfsd4_encode_security_label(xdr, rqstp, context, |
| 3435 | contextlen); |
| 3436 | if (status) |
| 3437 | goto out; |
| 3438 | } |
| 3439 | #endif |
| 3440 | |
| 3441 | if (bmval2 & FATTR4_WORD2_XATTR_SUPPORT) { |
| 3442 | p = xdr_reserve_space(xdr, 4); |
| 3443 | if (!p) |
| 3444 | goto out_resource; |
| 3445 | err = xattr_supported_namespace(d_inode(dentry), |
| 3446 | XATTR_USER_PREFIX); |
| 3447 | *p++ = cpu_to_be32(err == 0); |
| 3448 | } |
| 3449 | |
| 3450 | *attrlen_p = cpu_to_be32(xdr->buf->len - attrlen_offset - XDR_UNIT); |
| 3451 | status = nfs_ok; |
| 3452 | |
| 3453 | out: |
| 3454 | #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
| 3455 | if (context) |
| 3456 | security_release_secctx(context, contextlen); |
| 3457 | #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ |
| 3458 | kfree(acl); |
| 3459 | if (tempfh) { |
| 3460 | fh_put(tempfh); |
| 3461 | kfree(tempfh); |
| 3462 | } |
| 3463 | if (status) |
| 3464 | xdr_truncate_encode(xdr, starting_len); |
| 3465 | return status; |
| 3466 | out_nfserr: |
| 3467 | status = nfserrno(err); |
| 3468 | goto out; |
| 3469 | out_resource: |
| 3470 | status = nfserr_resource; |
| 3471 | goto out; |
| 3472 | } |
| 3473 | |
| 3474 | static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr, |
| 3475 | struct xdr_buf *buf, __be32 *p, int bytes) |
| 3476 | { |
| 3477 | xdr->scratch.iov_len = 0; |
| 3478 | memset(buf, 0, sizeof(struct xdr_buf)); |
| 3479 | buf->head[0].iov_base = p; |
| 3480 | buf->head[0].iov_len = 0; |
| 3481 | buf->len = 0; |
| 3482 | xdr->buf = buf; |
| 3483 | xdr->iov = buf->head; |
| 3484 | xdr->p = p; |
| 3485 | xdr->end = (void *)p + bytes; |
| 3486 | buf->buflen = bytes; |
| 3487 | } |
| 3488 | |
| 3489 | __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words, |
| 3490 | struct svc_fh *fhp, struct svc_export *exp, |
| 3491 | struct dentry *dentry, u32 *bmval, |
| 3492 | struct svc_rqst *rqstp, int ignore_crossmnt) |
| 3493 | { |
| 3494 | struct xdr_buf dummy; |
| 3495 | struct xdr_stream xdr; |
| 3496 | __be32 ret; |
| 3497 | |
| 3498 | svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2); |
| 3499 | ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp, |
| 3500 | ignore_crossmnt); |
| 3501 | *p = xdr.p; |
| 3502 | return ret; |
| 3503 | } |
| 3504 | |
| 3505 | static inline int attributes_need_mount(u32 *bmval) |
| 3506 | { |
| 3507 | if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) |
| 3508 | return 1; |
| 3509 | if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) |
| 3510 | return 1; |
| 3511 | return 0; |
| 3512 | } |
| 3513 | |
| 3514 | static __be32 |
| 3515 | nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd, |
| 3516 | const char *name, int namlen) |
| 3517 | { |
| 3518 | struct svc_export *exp = cd->rd_fhp->fh_export; |
| 3519 | struct dentry *dentry; |
| 3520 | __be32 nfserr; |
| 3521 | int ignore_crossmnt = 0; |
| 3522 | |
| 3523 | dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen); |
| 3524 | if (IS_ERR(dentry)) |
| 3525 | return nfserrno(PTR_ERR(dentry)); |
| 3526 | |
| 3527 | exp_get(exp); |
| 3528 | /* |
| 3529 | * In the case of a mountpoint, the client may be asking for |
| 3530 | * attributes that are only properties of the underlying filesystem |
| 3531 | * as opposed to the cross-mounted file system. In such a case, |
| 3532 | * we will not follow the cross mount and will fill the attribtutes |
| 3533 | * directly from the mountpoint dentry. |
| 3534 | */ |
| 3535 | if (nfsd_mountpoint(dentry, exp)) { |
| 3536 | int err; |
| 3537 | |
| 3538 | if (!(exp->ex_flags & NFSEXP_V4ROOT) |
| 3539 | && !attributes_need_mount(cd->rd_bmval)) { |
| 3540 | ignore_crossmnt = 1; |
| 3541 | goto out_encode; |
| 3542 | } |
| 3543 | /* |
| 3544 | * Why the heck aren't we just using nfsd_lookup?? |
| 3545 | * Different "."/".." handling? Something else? |
| 3546 | * At least, add a comment here to explain.... |
| 3547 | */ |
| 3548 | err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); |
| 3549 | if (err) { |
| 3550 | nfserr = nfserrno(err); |
| 3551 | goto out_put; |
| 3552 | } |
| 3553 | nfserr = check_nfsd_access(exp, cd->rd_rqstp); |
| 3554 | if (nfserr) |
| 3555 | goto out_put; |
| 3556 | |
| 3557 | } |
| 3558 | out_encode: |
| 3559 | nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval, |
| 3560 | cd->rd_rqstp, ignore_crossmnt); |
| 3561 | out_put: |
| 3562 | dput(dentry); |
| 3563 | exp_put(exp); |
| 3564 | return nfserr; |
| 3565 | } |
| 3566 | |
| 3567 | static __be32 * |
| 3568 | nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr) |
| 3569 | { |
| 3570 | __be32 *p; |
| 3571 | |
| 3572 | p = xdr_reserve_space(xdr, 20); |
| 3573 | if (!p) |
| 3574 | return NULL; |
| 3575 | *p++ = htonl(2); |
| 3576 | *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ |
| 3577 | *p++ = htonl(0); /* bmval1 */ |
| 3578 | |
| 3579 | *p++ = htonl(4); /* attribute length */ |
| 3580 | *p++ = nfserr; /* no htonl */ |
| 3581 | return p; |
| 3582 | } |
| 3583 | |
| 3584 | static int |
| 3585 | nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, |
| 3586 | loff_t offset, u64 ino, unsigned int d_type) |
| 3587 | { |
| 3588 | struct readdir_cd *ccd = ccdv; |
| 3589 | struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); |
| 3590 | struct xdr_stream *xdr = cd->xdr; |
| 3591 | int start_offset = xdr->buf->len; |
| 3592 | int cookie_offset; |
| 3593 | u32 name_and_cookie; |
| 3594 | int entry_bytes; |
| 3595 | __be32 nfserr = nfserr_toosmall; |
| 3596 | __be64 wire_offset; |
| 3597 | __be32 *p; |
| 3598 | |
| 3599 | /* In nfsv4, "." and ".." never make it onto the wire.. */ |
| 3600 | if (name && isdotent(name, namlen)) { |
| 3601 | cd->common.err = nfs_ok; |
| 3602 | return 0; |
| 3603 | } |
| 3604 | |
| 3605 | if (cd->cookie_offset) { |
| 3606 | wire_offset = cpu_to_be64(offset); |
| 3607 | write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset, |
| 3608 | &wire_offset, 8); |
| 3609 | } |
| 3610 | |
| 3611 | p = xdr_reserve_space(xdr, 4); |
| 3612 | if (!p) |
| 3613 | goto fail; |
| 3614 | *p++ = xdr_one; /* mark entry present */ |
| 3615 | cookie_offset = xdr->buf->len; |
| 3616 | p = xdr_reserve_space(xdr, 3*4 + namlen); |
| 3617 | if (!p) |
| 3618 | goto fail; |
| 3619 | p = xdr_encode_hyper(p, OFFSET_MAX); /* offset of next entry */ |
| 3620 | p = xdr_encode_array(p, name, namlen); /* name length & name */ |
| 3621 | |
| 3622 | nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen); |
| 3623 | switch (nfserr) { |
| 3624 | case nfs_ok: |
| 3625 | break; |
| 3626 | case nfserr_resource: |
| 3627 | nfserr = nfserr_toosmall; |
| 3628 | goto fail; |
| 3629 | case nfserr_noent: |
| 3630 | xdr_truncate_encode(xdr, start_offset); |
| 3631 | goto skip_entry; |
| 3632 | default: |
| 3633 | /* |
| 3634 | * If the client requested the RDATTR_ERROR attribute, |
| 3635 | * we stuff the error code into this attribute |
| 3636 | * and continue. If this attribute was not requested, |
| 3637 | * then in accordance with the spec, we fail the |
| 3638 | * entire READDIR operation(!) |
| 3639 | */ |
| 3640 | if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) |
| 3641 | goto fail; |
| 3642 | p = nfsd4_encode_rdattr_error(xdr, nfserr); |
| 3643 | if (p == NULL) { |
| 3644 | nfserr = nfserr_toosmall; |
| 3645 | goto fail; |
| 3646 | } |
| 3647 | } |
| 3648 | nfserr = nfserr_toosmall; |
| 3649 | entry_bytes = xdr->buf->len - start_offset; |
| 3650 | if (entry_bytes > cd->rd_maxcount) |
| 3651 | goto fail; |
| 3652 | cd->rd_maxcount -= entry_bytes; |
| 3653 | /* |
| 3654 | * RFC 3530 14.2.24 describes rd_dircount as only a "hint", and |
| 3655 | * notes that it could be zero. If it is zero, then the server |
| 3656 | * should enforce only the rd_maxcount value. |
| 3657 | */ |
| 3658 | if (cd->rd_dircount) { |
| 3659 | name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8; |
| 3660 | if (name_and_cookie > cd->rd_dircount && cd->cookie_offset) |
| 3661 | goto fail; |
| 3662 | cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie); |
| 3663 | if (!cd->rd_dircount) |
| 3664 | cd->rd_maxcount = 0; |
| 3665 | } |
| 3666 | |
| 3667 | cd->cookie_offset = cookie_offset; |
| 3668 | skip_entry: |
| 3669 | cd->common.err = nfs_ok; |
| 3670 | return 0; |
| 3671 | fail: |
| 3672 | xdr_truncate_encode(xdr, start_offset); |
| 3673 | cd->common.err = nfserr; |
| 3674 | return -EINVAL; |
| 3675 | } |
| 3676 | |
| 3677 | static __be32 |
| 3678 | nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid) |
| 3679 | { |
| 3680 | __be32 *p; |
| 3681 | |
| 3682 | p = xdr_reserve_space(xdr, sizeof(stateid_t)); |
| 3683 | if (!p) |
| 3684 | return nfserr_resource; |
| 3685 | *p++ = cpu_to_be32(sid->si_generation); |
| 3686 | p = xdr_encode_opaque_fixed(p, &sid->si_opaque, |
| 3687 | sizeof(stateid_opaque_t)); |
| 3688 | return 0; |
| 3689 | } |
| 3690 | |
| 3691 | static __be32 |
| 3692 | nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 3693 | union nfsd4_op_u *u) |
| 3694 | { |
| 3695 | struct nfsd4_access *access = &u->access; |
| 3696 | struct xdr_stream *xdr = resp->xdr; |
| 3697 | __be32 *p; |
| 3698 | |
| 3699 | p = xdr_reserve_space(xdr, 8); |
| 3700 | if (!p) |
| 3701 | return nfserr_resource; |
| 3702 | *p++ = cpu_to_be32(access->ac_supported); |
| 3703 | *p++ = cpu_to_be32(access->ac_resp_access); |
| 3704 | return 0; |
| 3705 | } |
| 3706 | |
| 3707 | static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 3708 | union nfsd4_op_u *u) |
| 3709 | { |
| 3710 | struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session; |
| 3711 | struct xdr_stream *xdr = resp->xdr; |
| 3712 | __be32 *p; |
| 3713 | |
| 3714 | p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8); |
| 3715 | if (!p) |
| 3716 | return nfserr_resource; |
| 3717 | p = xdr_encode_opaque_fixed(p, bcts->sessionid.data, |
| 3718 | NFS4_MAX_SESSIONID_LEN); |
| 3719 | *p++ = cpu_to_be32(bcts->dir); |
| 3720 | /* Upshifting from TCP to RDMA is not supported */ |
| 3721 | *p++ = cpu_to_be32(0); |
| 3722 | return 0; |
| 3723 | } |
| 3724 | |
| 3725 | static __be32 |
| 3726 | nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 3727 | union nfsd4_op_u *u) |
| 3728 | { |
| 3729 | struct nfsd4_close *close = &u->close; |
| 3730 | struct xdr_stream *xdr = resp->xdr; |
| 3731 | |
| 3732 | return nfsd4_encode_stateid(xdr, &close->cl_stateid); |
| 3733 | } |
| 3734 | |
| 3735 | |
| 3736 | static __be32 |
| 3737 | nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 3738 | union nfsd4_op_u *u) |
| 3739 | { |
| 3740 | struct nfsd4_commit *commit = &u->commit; |
| 3741 | struct xdr_stream *xdr = resp->xdr; |
| 3742 | __be32 *p; |
| 3743 | |
| 3744 | p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); |
| 3745 | if (!p) |
| 3746 | return nfserr_resource; |
| 3747 | p = xdr_encode_opaque_fixed(p, commit->co_verf.data, |
| 3748 | NFS4_VERIFIER_SIZE); |
| 3749 | return 0; |
| 3750 | } |
| 3751 | |
| 3752 | static __be32 |
| 3753 | nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 3754 | union nfsd4_op_u *u) |
| 3755 | { |
| 3756 | struct nfsd4_create *create = &u->create; |
| 3757 | struct xdr_stream *xdr = resp->xdr; |
| 3758 | __be32 *p; |
| 3759 | |
| 3760 | p = xdr_reserve_space(xdr, 20); |
| 3761 | if (!p) |
| 3762 | return nfserr_resource; |
| 3763 | encode_cinfo(p, &create->cr_cinfo); |
| 3764 | return nfsd4_encode_bitmap(xdr, create->cr_bmval[0], |
| 3765 | create->cr_bmval[1], create->cr_bmval[2]); |
| 3766 | } |
| 3767 | |
| 3768 | static __be32 |
| 3769 | nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 3770 | union nfsd4_op_u *u) |
| 3771 | { |
| 3772 | struct nfsd4_getattr *getattr = &u->getattr; |
| 3773 | struct svc_fh *fhp = getattr->ga_fhp; |
| 3774 | struct xdr_stream *xdr = resp->xdr; |
| 3775 | |
| 3776 | return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry, |
| 3777 | getattr->ga_bmval, resp->rqstp, 0); |
| 3778 | } |
| 3779 | |
| 3780 | static __be32 |
| 3781 | nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 3782 | union nfsd4_op_u *u) |
| 3783 | { |
| 3784 | struct svc_fh **fhpp = &u->getfh; |
| 3785 | struct xdr_stream *xdr = resp->xdr; |
| 3786 | struct svc_fh *fhp = *fhpp; |
| 3787 | unsigned int len; |
| 3788 | __be32 *p; |
| 3789 | |
| 3790 | len = fhp->fh_handle.fh_size; |
| 3791 | p = xdr_reserve_space(xdr, len + 4); |
| 3792 | if (!p) |
| 3793 | return nfserr_resource; |
| 3794 | p = xdr_encode_opaque(p, &fhp->fh_handle.fh_raw, len); |
| 3795 | return 0; |
| 3796 | } |
| 3797 | |
| 3798 | /* |
| 3799 | * Including all fields other than the name, a LOCK4denied structure requires |
| 3800 | * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. |
| 3801 | */ |
| 3802 | static __be32 |
| 3803 | nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld) |
| 3804 | { |
| 3805 | struct xdr_netobj *conf = &ld->ld_owner; |
| 3806 | __be32 *p; |
| 3807 | |
| 3808 | again: |
| 3809 | p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len)); |
| 3810 | if (!p) { |
| 3811 | /* |
| 3812 | * Don't fail to return the result just because we can't |
| 3813 | * return the conflicting open: |
| 3814 | */ |
| 3815 | if (conf->len) { |
| 3816 | kfree(conf->data); |
| 3817 | conf->len = 0; |
| 3818 | conf->data = NULL; |
| 3819 | goto again; |
| 3820 | } |
| 3821 | return nfserr_resource; |
| 3822 | } |
| 3823 | p = xdr_encode_hyper(p, ld->ld_start); |
| 3824 | p = xdr_encode_hyper(p, ld->ld_length); |
| 3825 | *p++ = cpu_to_be32(ld->ld_type); |
| 3826 | if (conf->len) { |
| 3827 | p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8); |
| 3828 | p = xdr_encode_opaque(p, conf->data, conf->len); |
| 3829 | kfree(conf->data); |
| 3830 | } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ |
| 3831 | p = xdr_encode_hyper(p, (u64)0); /* clientid */ |
| 3832 | *p++ = cpu_to_be32(0); /* length of owner name */ |
| 3833 | } |
| 3834 | return nfserr_denied; |
| 3835 | } |
| 3836 | |
| 3837 | static __be32 |
| 3838 | nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 3839 | union nfsd4_op_u *u) |
| 3840 | { |
| 3841 | struct nfsd4_lock *lock = &u->lock; |
| 3842 | struct xdr_stream *xdr = resp->xdr; |
| 3843 | |
| 3844 | if (!nfserr) |
| 3845 | nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid); |
| 3846 | else if (nfserr == nfserr_denied) |
| 3847 | nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied); |
| 3848 | |
| 3849 | return nfserr; |
| 3850 | } |
| 3851 | |
| 3852 | static __be32 |
| 3853 | nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 3854 | union nfsd4_op_u *u) |
| 3855 | { |
| 3856 | struct nfsd4_lockt *lockt = &u->lockt; |
| 3857 | struct xdr_stream *xdr = resp->xdr; |
| 3858 | |
| 3859 | if (nfserr == nfserr_denied) |
| 3860 | nfsd4_encode_lock_denied(xdr, &lockt->lt_denied); |
| 3861 | return nfserr; |
| 3862 | } |
| 3863 | |
| 3864 | static __be32 |
| 3865 | nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 3866 | union nfsd4_op_u *u) |
| 3867 | { |
| 3868 | struct nfsd4_locku *locku = &u->locku; |
| 3869 | struct xdr_stream *xdr = resp->xdr; |
| 3870 | |
| 3871 | return nfsd4_encode_stateid(xdr, &locku->lu_stateid); |
| 3872 | } |
| 3873 | |
| 3874 | |
| 3875 | static __be32 |
| 3876 | nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 3877 | union nfsd4_op_u *u) |
| 3878 | { |
| 3879 | struct nfsd4_link *link = &u->link; |
| 3880 | struct xdr_stream *xdr = resp->xdr; |
| 3881 | __be32 *p; |
| 3882 | |
| 3883 | p = xdr_reserve_space(xdr, 20); |
| 3884 | if (!p) |
| 3885 | return nfserr_resource; |
| 3886 | p = encode_cinfo(p, &link->li_cinfo); |
| 3887 | return 0; |
| 3888 | } |
| 3889 | |
| 3890 | |
| 3891 | static __be32 |
| 3892 | nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 3893 | union nfsd4_op_u *u) |
| 3894 | { |
| 3895 | struct nfsd4_open *open = &u->open; |
| 3896 | struct xdr_stream *xdr = resp->xdr; |
| 3897 | __be32 *p; |
| 3898 | |
| 3899 | nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid); |
| 3900 | if (nfserr) |
| 3901 | return nfserr; |
| 3902 | p = xdr_reserve_space(xdr, 24); |
| 3903 | if (!p) |
| 3904 | return nfserr_resource; |
| 3905 | p = encode_cinfo(p, &open->op_cinfo); |
| 3906 | *p++ = cpu_to_be32(open->op_rflags); |
| 3907 | |
| 3908 | nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1], |
| 3909 | open->op_bmval[2]); |
| 3910 | if (nfserr) |
| 3911 | return nfserr; |
| 3912 | |
| 3913 | p = xdr_reserve_space(xdr, 4); |
| 3914 | if (!p) |
| 3915 | return nfserr_resource; |
| 3916 | |
| 3917 | *p++ = cpu_to_be32(open->op_delegate_type); |
| 3918 | switch (open->op_delegate_type) { |
| 3919 | case NFS4_OPEN_DELEGATE_NONE: |
| 3920 | break; |
| 3921 | case NFS4_OPEN_DELEGATE_READ: |
| 3922 | nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); |
| 3923 | if (nfserr) |
| 3924 | return nfserr; |
| 3925 | p = xdr_reserve_space(xdr, 20); |
| 3926 | if (!p) |
| 3927 | return nfserr_resource; |
| 3928 | *p++ = cpu_to_be32(open->op_recall); |
| 3929 | |
| 3930 | /* |
| 3931 | * TODO: ACE's in delegations |
| 3932 | */ |
| 3933 | *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); |
| 3934 | *p++ = cpu_to_be32(0); |
| 3935 | *p++ = cpu_to_be32(0); |
| 3936 | *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ |
| 3937 | break; |
| 3938 | case NFS4_OPEN_DELEGATE_WRITE: |
| 3939 | nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); |
| 3940 | if (nfserr) |
| 3941 | return nfserr; |
| 3942 | p = xdr_reserve_space(xdr, 32); |
| 3943 | if (!p) |
| 3944 | return nfserr_resource; |
| 3945 | *p++ = cpu_to_be32(0); |
| 3946 | |
| 3947 | /* |
| 3948 | * TODO: space_limit's in delegations |
| 3949 | */ |
| 3950 | *p++ = cpu_to_be32(NFS4_LIMIT_SIZE); |
| 3951 | *p++ = cpu_to_be32(~(u32)0); |
| 3952 | *p++ = cpu_to_be32(~(u32)0); |
| 3953 | |
| 3954 | /* |
| 3955 | * TODO: ACE's in delegations |
| 3956 | */ |
| 3957 | *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); |
| 3958 | *p++ = cpu_to_be32(0); |
| 3959 | *p++ = cpu_to_be32(0); |
| 3960 | *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ |
| 3961 | break; |
| 3962 | case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */ |
| 3963 | switch (open->op_why_no_deleg) { |
| 3964 | case WND4_CONTENTION: |
| 3965 | case WND4_RESOURCE: |
| 3966 | p = xdr_reserve_space(xdr, 8); |
| 3967 | if (!p) |
| 3968 | return nfserr_resource; |
| 3969 | *p++ = cpu_to_be32(open->op_why_no_deleg); |
| 3970 | /* deleg signaling not supported yet: */ |
| 3971 | *p++ = cpu_to_be32(0); |
| 3972 | break; |
| 3973 | default: |
| 3974 | p = xdr_reserve_space(xdr, 4); |
| 3975 | if (!p) |
| 3976 | return nfserr_resource; |
| 3977 | *p++ = cpu_to_be32(open->op_why_no_deleg); |
| 3978 | } |
| 3979 | break; |
| 3980 | default: |
| 3981 | BUG(); |
| 3982 | } |
| 3983 | /* XXX save filehandle here */ |
| 3984 | return 0; |
| 3985 | } |
| 3986 | |
| 3987 | static __be32 |
| 3988 | nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 3989 | union nfsd4_op_u *u) |
| 3990 | { |
| 3991 | struct nfsd4_open_confirm *oc = &u->open_confirm; |
| 3992 | struct xdr_stream *xdr = resp->xdr; |
| 3993 | |
| 3994 | return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid); |
| 3995 | } |
| 3996 | |
| 3997 | static __be32 |
| 3998 | nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 3999 | union nfsd4_op_u *u) |
| 4000 | { |
| 4001 | struct nfsd4_open_downgrade *od = &u->open_downgrade; |
| 4002 | struct xdr_stream *xdr = resp->xdr; |
| 4003 | |
| 4004 | return nfsd4_encode_stateid(xdr, &od->od_stateid); |
| 4005 | } |
| 4006 | |
| 4007 | static __be32 nfsd4_encode_splice_read( |
| 4008 | struct nfsd4_compoundres *resp, |
| 4009 | struct nfsd4_read *read, |
| 4010 | struct file *file, unsigned long maxcount) |
| 4011 | { |
| 4012 | struct xdr_stream *xdr = resp->xdr; |
| 4013 | struct xdr_buf *buf = xdr->buf; |
| 4014 | int status, space_left; |
| 4015 | __be32 nfserr; |
| 4016 | |
| 4017 | /* Make sure there will be room for padding if needed */ |
| 4018 | if (xdr->end - xdr->p < 1) |
| 4019 | return nfserr_resource; |
| 4020 | |
| 4021 | nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp, |
| 4022 | file, read->rd_offset, &maxcount, |
| 4023 | &read->rd_eof); |
| 4024 | read->rd_length = maxcount; |
| 4025 | if (nfserr) |
| 4026 | goto out_err; |
| 4027 | status = svc_encode_result_payload(read->rd_rqstp, |
| 4028 | buf->head[0].iov_len, maxcount); |
| 4029 | if (status) { |
| 4030 | nfserr = nfserrno(status); |
| 4031 | goto out_err; |
| 4032 | } |
| 4033 | |
| 4034 | buf->page_len = maxcount; |
| 4035 | buf->len += maxcount; |
| 4036 | xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1) |
| 4037 | / PAGE_SIZE; |
| 4038 | |
| 4039 | /* Use rest of head for padding and remaining ops: */ |
| 4040 | buf->tail[0].iov_base = xdr->p; |
| 4041 | buf->tail[0].iov_len = 0; |
| 4042 | xdr->iov = buf->tail; |
| 4043 | if (maxcount&3) { |
| 4044 | int pad = 4 - (maxcount&3); |
| 4045 | |
| 4046 | *(xdr->p++) = 0; |
| 4047 | |
| 4048 | buf->tail[0].iov_base += maxcount&3; |
| 4049 | buf->tail[0].iov_len = pad; |
| 4050 | buf->len += pad; |
| 4051 | } |
| 4052 | |
| 4053 | space_left = min_t(int, (void *)xdr->end - (void *)xdr->p, |
| 4054 | buf->buflen - buf->len); |
| 4055 | buf->buflen = buf->len + space_left; |
| 4056 | xdr->end = (__be32 *)((void *)xdr->end + space_left); |
| 4057 | |
| 4058 | return 0; |
| 4059 | |
| 4060 | out_err: |
| 4061 | /* |
| 4062 | * nfsd_splice_actor may have already messed with the |
| 4063 | * page length; reset it so as not to confuse |
| 4064 | * xdr_truncate_encode in our caller. |
| 4065 | */ |
| 4066 | buf->page_len = 0; |
| 4067 | return nfserr; |
| 4068 | } |
| 4069 | |
| 4070 | static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, |
| 4071 | struct nfsd4_read *read, |
| 4072 | struct file *file, unsigned long maxcount) |
| 4073 | { |
| 4074 | struct xdr_stream *xdr = resp->xdr; |
| 4075 | unsigned int starting_len = xdr->buf->len; |
| 4076 | __be32 zero = xdr_zero; |
| 4077 | __be32 nfserr; |
| 4078 | |
| 4079 | read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, maxcount); |
| 4080 | if (read->rd_vlen < 0) |
| 4081 | return nfserr_resource; |
| 4082 | |
| 4083 | nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset, |
| 4084 | resp->rqstp->rq_vec, read->rd_vlen, &maxcount, |
| 4085 | &read->rd_eof); |
| 4086 | read->rd_length = maxcount; |
| 4087 | if (nfserr) |
| 4088 | return nfserr; |
| 4089 | if (svc_encode_result_payload(resp->rqstp, starting_len, maxcount)) |
| 4090 | return nfserr_io; |
| 4091 | xdr_truncate_encode(xdr, starting_len + xdr_align_size(maxcount)); |
| 4092 | |
| 4093 | write_bytes_to_xdr_buf(xdr->buf, starting_len + maxcount, &zero, |
| 4094 | xdr_pad_size(maxcount)); |
| 4095 | return nfs_ok; |
| 4096 | } |
| 4097 | |
| 4098 | static __be32 |
| 4099 | nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4100 | union nfsd4_op_u *u) |
| 4101 | { |
| 4102 | struct nfsd4_read *read = &u->read; |
| 4103 | bool splice_ok = test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags); |
| 4104 | unsigned long maxcount; |
| 4105 | struct xdr_stream *xdr = resp->xdr; |
| 4106 | struct file *file; |
| 4107 | int starting_len = xdr->buf->len; |
| 4108 | __be32 *p; |
| 4109 | |
| 4110 | if (nfserr) |
| 4111 | return nfserr; |
| 4112 | file = read->rd_nf->nf_file; |
| 4113 | |
| 4114 | p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */ |
| 4115 | if (!p) { |
| 4116 | WARN_ON_ONCE(splice_ok); |
| 4117 | return nfserr_resource; |
| 4118 | } |
| 4119 | if (resp->xdr->buf->page_len && splice_ok) { |
| 4120 | WARN_ON_ONCE(1); |
| 4121 | return nfserr_serverfault; |
| 4122 | } |
| 4123 | xdr_commit_encode(xdr); |
| 4124 | |
| 4125 | maxcount = min_t(unsigned long, read->rd_length, |
| 4126 | (xdr->buf->buflen - xdr->buf->len)); |
| 4127 | |
| 4128 | if (file->f_op->splice_read && splice_ok) |
| 4129 | nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount); |
| 4130 | else |
| 4131 | nfserr = nfsd4_encode_readv(resp, read, file, maxcount); |
| 4132 | if (nfserr) { |
| 4133 | xdr_truncate_encode(xdr, starting_len); |
| 4134 | return nfserr; |
| 4135 | } |
| 4136 | |
| 4137 | p = xdr_encode_bool(p, read->rd_eof); |
| 4138 | *p = cpu_to_be32(read->rd_length); |
| 4139 | return nfs_ok; |
| 4140 | } |
| 4141 | |
| 4142 | static __be32 |
| 4143 | nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4144 | union nfsd4_op_u *u) |
| 4145 | { |
| 4146 | struct nfsd4_readlink *readlink = &u->readlink; |
| 4147 | __be32 *p, *maxcount_p, zero = xdr_zero; |
| 4148 | struct xdr_stream *xdr = resp->xdr; |
| 4149 | int length_offset = xdr->buf->len; |
| 4150 | int maxcount, status; |
| 4151 | |
| 4152 | maxcount_p = xdr_reserve_space(xdr, XDR_UNIT); |
| 4153 | if (!maxcount_p) |
| 4154 | return nfserr_resource; |
| 4155 | maxcount = PAGE_SIZE; |
| 4156 | |
| 4157 | p = xdr_reserve_space(xdr, maxcount); |
| 4158 | if (!p) |
| 4159 | return nfserr_resource; |
| 4160 | /* |
| 4161 | * XXX: By default, vfs_readlink() will truncate symlinks if they |
| 4162 | * would overflow the buffer. Is this kosher in NFSv4? If not, one |
| 4163 | * easy fix is: if vfs_readlink() precisely fills the buffer, assume |
| 4164 | * that truncation occurred, and return NFS4ERR_RESOURCE. |
| 4165 | */ |
| 4166 | nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, |
| 4167 | (char *)p, &maxcount); |
| 4168 | if (nfserr == nfserr_isdir) |
| 4169 | nfserr = nfserr_inval; |
| 4170 | if (nfserr) |
| 4171 | goto out_err; |
| 4172 | status = svc_encode_result_payload(readlink->rl_rqstp, length_offset, |
| 4173 | maxcount); |
| 4174 | if (status) { |
| 4175 | nfserr = nfserrno(status); |
| 4176 | goto out_err; |
| 4177 | } |
| 4178 | *maxcount_p = cpu_to_be32(maxcount); |
| 4179 | xdr_truncate_encode(xdr, length_offset + 4 + xdr_align_size(maxcount)); |
| 4180 | write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, &zero, |
| 4181 | xdr_pad_size(maxcount)); |
| 4182 | return nfs_ok; |
| 4183 | |
| 4184 | out_err: |
| 4185 | xdr_truncate_encode(xdr, length_offset); |
| 4186 | return nfserr; |
| 4187 | } |
| 4188 | |
| 4189 | static __be32 |
| 4190 | nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4191 | union nfsd4_op_u *u) |
| 4192 | { |
| 4193 | struct nfsd4_readdir *readdir = &u->readdir; |
| 4194 | int maxcount; |
| 4195 | int bytes_left; |
| 4196 | loff_t offset; |
| 4197 | __be64 wire_offset; |
| 4198 | struct xdr_stream *xdr = resp->xdr; |
| 4199 | int starting_len = xdr->buf->len; |
| 4200 | __be32 *p; |
| 4201 | |
| 4202 | p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); |
| 4203 | if (!p) |
| 4204 | return nfserr_resource; |
| 4205 | |
| 4206 | /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ |
| 4207 | *p++ = cpu_to_be32(0); |
| 4208 | *p++ = cpu_to_be32(0); |
| 4209 | xdr->buf->head[0].iov_len = (char *)xdr->p - |
| 4210 | (char *)xdr->buf->head[0].iov_base; |
| 4211 | |
| 4212 | /* |
| 4213 | * Number of bytes left for directory entries allowing for the |
| 4214 | * final 8 bytes of the readdir and a following failed op: |
| 4215 | */ |
| 4216 | bytes_left = xdr->buf->buflen - xdr->buf->len |
| 4217 | - COMPOUND_ERR_SLACK_SPACE - 8; |
| 4218 | if (bytes_left < 0) { |
| 4219 | nfserr = nfserr_resource; |
| 4220 | goto err_no_verf; |
| 4221 | } |
| 4222 | maxcount = svc_max_payload(resp->rqstp); |
| 4223 | maxcount = min_t(u32, readdir->rd_maxcount, maxcount); |
| 4224 | /* |
| 4225 | * Note the rfc defines rd_maxcount as the size of the |
| 4226 | * READDIR4resok structure, which includes the verifier above |
| 4227 | * and the 8 bytes encoded at the end of this function: |
| 4228 | */ |
| 4229 | if (maxcount < 16) { |
| 4230 | nfserr = nfserr_toosmall; |
| 4231 | goto err_no_verf; |
| 4232 | } |
| 4233 | maxcount = min_t(int, maxcount-16, bytes_left); |
| 4234 | |
| 4235 | /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */ |
| 4236 | if (!readdir->rd_dircount) |
| 4237 | readdir->rd_dircount = svc_max_payload(resp->rqstp); |
| 4238 | |
| 4239 | readdir->xdr = xdr; |
| 4240 | readdir->rd_maxcount = maxcount; |
| 4241 | readdir->common.err = 0; |
| 4242 | readdir->cookie_offset = 0; |
| 4243 | |
| 4244 | offset = readdir->rd_cookie; |
| 4245 | nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, |
| 4246 | &offset, |
| 4247 | &readdir->common, nfsd4_encode_dirent); |
| 4248 | if (nfserr == nfs_ok && |
| 4249 | readdir->common.err == nfserr_toosmall && |
| 4250 | xdr->buf->len == starting_len + 8) { |
| 4251 | /* nothing encoded; which limit did we hit?: */ |
| 4252 | if (maxcount - 16 < bytes_left) |
| 4253 | /* It was the fault of rd_maxcount: */ |
| 4254 | nfserr = nfserr_toosmall; |
| 4255 | else |
| 4256 | /* We ran out of buffer space: */ |
| 4257 | nfserr = nfserr_resource; |
| 4258 | } |
| 4259 | if (nfserr) |
| 4260 | goto err_no_verf; |
| 4261 | |
| 4262 | if (readdir->cookie_offset) { |
| 4263 | wire_offset = cpu_to_be64(offset); |
| 4264 | write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset, |
| 4265 | &wire_offset, 8); |
| 4266 | } |
| 4267 | |
| 4268 | p = xdr_reserve_space(xdr, 8); |
| 4269 | if (!p) { |
| 4270 | WARN_ON_ONCE(1); |
| 4271 | goto err_no_verf; |
| 4272 | } |
| 4273 | *p++ = 0; /* no more entries */ |
| 4274 | *p++ = htonl(readdir->common.err == nfserr_eof); |
| 4275 | |
| 4276 | return 0; |
| 4277 | err_no_verf: |
| 4278 | xdr_truncate_encode(xdr, starting_len); |
| 4279 | return nfserr; |
| 4280 | } |
| 4281 | |
| 4282 | static __be32 |
| 4283 | nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4284 | union nfsd4_op_u *u) |
| 4285 | { |
| 4286 | struct nfsd4_remove *remove = &u->remove; |
| 4287 | struct xdr_stream *xdr = resp->xdr; |
| 4288 | __be32 *p; |
| 4289 | |
| 4290 | p = xdr_reserve_space(xdr, 20); |
| 4291 | if (!p) |
| 4292 | return nfserr_resource; |
| 4293 | p = encode_cinfo(p, &remove->rm_cinfo); |
| 4294 | return 0; |
| 4295 | } |
| 4296 | |
| 4297 | static __be32 |
| 4298 | nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4299 | union nfsd4_op_u *u) |
| 4300 | { |
| 4301 | struct nfsd4_rename *rename = &u->rename; |
| 4302 | struct xdr_stream *xdr = resp->xdr; |
| 4303 | __be32 *p; |
| 4304 | |
| 4305 | p = xdr_reserve_space(xdr, 40); |
| 4306 | if (!p) |
| 4307 | return nfserr_resource; |
| 4308 | p = encode_cinfo(p, &rename->rn_sinfo); |
| 4309 | p = encode_cinfo(p, &rename->rn_tinfo); |
| 4310 | return 0; |
| 4311 | } |
| 4312 | |
| 4313 | static __be32 |
| 4314 | nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp) |
| 4315 | { |
| 4316 | u32 i, nflavs, supported; |
| 4317 | struct exp_flavor_info *flavs; |
| 4318 | struct exp_flavor_info def_flavs[2]; |
| 4319 | __be32 *p, *flavorsp; |
| 4320 | static bool report = true; |
| 4321 | |
| 4322 | if (exp->ex_nflavors) { |
| 4323 | flavs = exp->ex_flavors; |
| 4324 | nflavs = exp->ex_nflavors; |
| 4325 | } else { /* Handling of some defaults in absence of real secinfo: */ |
| 4326 | flavs = def_flavs; |
| 4327 | if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { |
| 4328 | nflavs = 2; |
| 4329 | flavs[0].pseudoflavor = RPC_AUTH_UNIX; |
| 4330 | flavs[1].pseudoflavor = RPC_AUTH_NULL; |
| 4331 | } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { |
| 4332 | nflavs = 1; |
| 4333 | flavs[0].pseudoflavor |
| 4334 | = svcauth_gss_flavor(exp->ex_client); |
| 4335 | } else { |
| 4336 | nflavs = 1; |
| 4337 | flavs[0].pseudoflavor |
| 4338 | = exp->ex_client->flavour->flavour; |
| 4339 | } |
| 4340 | } |
| 4341 | |
| 4342 | supported = 0; |
| 4343 | p = xdr_reserve_space(xdr, 4); |
| 4344 | if (!p) |
| 4345 | return nfserr_resource; |
| 4346 | flavorsp = p++; /* to be backfilled later */ |
| 4347 | |
| 4348 | for (i = 0; i < nflavs; i++) { |
| 4349 | rpc_authflavor_t pf = flavs[i].pseudoflavor; |
| 4350 | struct rpcsec_gss_info info; |
| 4351 | |
| 4352 | if (rpcauth_get_gssinfo(pf, &info) == 0) { |
| 4353 | supported++; |
| 4354 | p = xdr_reserve_space(xdr, 4 + 4 + |
| 4355 | XDR_LEN(info.oid.len) + 4 + 4); |
| 4356 | if (!p) |
| 4357 | return nfserr_resource; |
| 4358 | *p++ = cpu_to_be32(RPC_AUTH_GSS); |
| 4359 | p = xdr_encode_opaque(p, info.oid.data, info.oid.len); |
| 4360 | *p++ = cpu_to_be32(info.qop); |
| 4361 | *p++ = cpu_to_be32(info.service); |
| 4362 | } else if (pf < RPC_AUTH_MAXFLAVOR) { |
| 4363 | supported++; |
| 4364 | p = xdr_reserve_space(xdr, 4); |
| 4365 | if (!p) |
| 4366 | return nfserr_resource; |
| 4367 | *p++ = cpu_to_be32(pf); |
| 4368 | } else { |
| 4369 | if (report) |
| 4370 | pr_warn("NFS: SECINFO: security flavor %u " |
| 4371 | "is not supported\n", pf); |
| 4372 | } |
| 4373 | } |
| 4374 | |
| 4375 | if (nflavs != supported) |
| 4376 | report = false; |
| 4377 | *flavorsp = htonl(supported); |
| 4378 | return 0; |
| 4379 | } |
| 4380 | |
| 4381 | static __be32 |
| 4382 | nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4383 | union nfsd4_op_u *u) |
| 4384 | { |
| 4385 | struct nfsd4_secinfo *secinfo = &u->secinfo; |
| 4386 | struct xdr_stream *xdr = resp->xdr; |
| 4387 | |
| 4388 | return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp); |
| 4389 | } |
| 4390 | |
| 4391 | static __be32 |
| 4392 | nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4393 | union nfsd4_op_u *u) |
| 4394 | { |
| 4395 | struct nfsd4_secinfo_no_name *secinfo = &u->secinfo_no_name; |
| 4396 | struct xdr_stream *xdr = resp->xdr; |
| 4397 | |
| 4398 | return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp); |
| 4399 | } |
| 4400 | |
| 4401 | /* |
| 4402 | * The SETATTR encode routine is special -- it always encodes a bitmap, |
| 4403 | * regardless of the error status. |
| 4404 | */ |
| 4405 | static __be32 |
| 4406 | nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4407 | union nfsd4_op_u *u) |
| 4408 | { |
| 4409 | struct nfsd4_setattr *setattr = &u->setattr; |
| 4410 | struct xdr_stream *xdr = resp->xdr; |
| 4411 | __be32 *p; |
| 4412 | |
| 4413 | p = xdr_reserve_space(xdr, 16); |
| 4414 | if (!p) |
| 4415 | return nfserr_resource; |
| 4416 | if (nfserr) { |
| 4417 | *p++ = cpu_to_be32(3); |
| 4418 | *p++ = cpu_to_be32(0); |
| 4419 | *p++ = cpu_to_be32(0); |
| 4420 | *p++ = cpu_to_be32(0); |
| 4421 | } |
| 4422 | else { |
| 4423 | *p++ = cpu_to_be32(3); |
| 4424 | *p++ = cpu_to_be32(setattr->sa_bmval[0]); |
| 4425 | *p++ = cpu_to_be32(setattr->sa_bmval[1]); |
| 4426 | *p++ = cpu_to_be32(setattr->sa_bmval[2]); |
| 4427 | } |
| 4428 | return nfserr; |
| 4429 | } |
| 4430 | |
| 4431 | static __be32 |
| 4432 | nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4433 | union nfsd4_op_u *u) |
| 4434 | { |
| 4435 | struct nfsd4_setclientid *scd = &u->setclientid; |
| 4436 | struct xdr_stream *xdr = resp->xdr; |
| 4437 | __be32 *p; |
| 4438 | |
| 4439 | if (!nfserr) { |
| 4440 | p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE); |
| 4441 | if (!p) |
| 4442 | return nfserr_resource; |
| 4443 | p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8); |
| 4444 | p = xdr_encode_opaque_fixed(p, &scd->se_confirm, |
| 4445 | NFS4_VERIFIER_SIZE); |
| 4446 | } |
| 4447 | else if (nfserr == nfserr_clid_inuse) { |
| 4448 | p = xdr_reserve_space(xdr, 8); |
| 4449 | if (!p) |
| 4450 | return nfserr_resource; |
| 4451 | *p++ = cpu_to_be32(0); |
| 4452 | *p++ = cpu_to_be32(0); |
| 4453 | } |
| 4454 | return nfserr; |
| 4455 | } |
| 4456 | |
| 4457 | static __be32 |
| 4458 | nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4459 | union nfsd4_op_u *u) |
| 4460 | { |
| 4461 | struct nfsd4_write *write = &u->write; |
| 4462 | struct xdr_stream *xdr = resp->xdr; |
| 4463 | __be32 *p; |
| 4464 | |
| 4465 | p = xdr_reserve_space(xdr, 16); |
| 4466 | if (!p) |
| 4467 | return nfserr_resource; |
| 4468 | *p++ = cpu_to_be32(write->wr_bytes_written); |
| 4469 | *p++ = cpu_to_be32(write->wr_how_written); |
| 4470 | p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, |
| 4471 | NFS4_VERIFIER_SIZE); |
| 4472 | return 0; |
| 4473 | } |
| 4474 | |
| 4475 | static __be32 |
| 4476 | nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4477 | union nfsd4_op_u *u) |
| 4478 | { |
| 4479 | struct nfsd4_exchange_id *exid = &u->exchange_id; |
| 4480 | struct xdr_stream *xdr = resp->xdr; |
| 4481 | __be32 *p; |
| 4482 | char *major_id; |
| 4483 | char *server_scope; |
| 4484 | int major_id_sz; |
| 4485 | int server_scope_sz; |
| 4486 | uint64_t minor_id = 0; |
| 4487 | struct nfsd_net *nn = net_generic(SVC_NET(resp->rqstp), nfsd_net_id); |
| 4488 | |
| 4489 | major_id = nn->nfsd_name; |
| 4490 | major_id_sz = strlen(nn->nfsd_name); |
| 4491 | server_scope = nn->nfsd_name; |
| 4492 | server_scope_sz = strlen(nn->nfsd_name); |
| 4493 | |
| 4494 | p = xdr_reserve_space(xdr, |
| 4495 | 8 /* eir_clientid */ + |
| 4496 | 4 /* eir_sequenceid */ + |
| 4497 | 4 /* eir_flags */ + |
| 4498 | 4 /* spr_how */); |
| 4499 | if (!p) |
| 4500 | return nfserr_resource; |
| 4501 | |
| 4502 | p = xdr_encode_opaque_fixed(p, &exid->clientid, 8); |
| 4503 | *p++ = cpu_to_be32(exid->seqid); |
| 4504 | *p++ = cpu_to_be32(exid->flags); |
| 4505 | |
| 4506 | *p++ = cpu_to_be32(exid->spa_how); |
| 4507 | |
| 4508 | switch (exid->spa_how) { |
| 4509 | case SP4_NONE: |
| 4510 | break; |
| 4511 | case SP4_MACH_CRED: |
| 4512 | /* spo_must_enforce bitmap: */ |
| 4513 | nfserr = nfsd4_encode_bitmap(xdr, |
| 4514 | exid->spo_must_enforce[0], |
| 4515 | exid->spo_must_enforce[1], |
| 4516 | exid->spo_must_enforce[2]); |
| 4517 | if (nfserr) |
| 4518 | return nfserr; |
| 4519 | /* spo_must_allow bitmap: */ |
| 4520 | nfserr = nfsd4_encode_bitmap(xdr, |
| 4521 | exid->spo_must_allow[0], |
| 4522 | exid->spo_must_allow[1], |
| 4523 | exid->spo_must_allow[2]); |
| 4524 | if (nfserr) |
| 4525 | return nfserr; |
| 4526 | break; |
| 4527 | default: |
| 4528 | WARN_ON_ONCE(1); |
| 4529 | } |
| 4530 | |
| 4531 | p = xdr_reserve_space(xdr, |
| 4532 | 8 /* so_minor_id */ + |
| 4533 | 4 /* so_major_id.len */ + |
| 4534 | (XDR_QUADLEN(major_id_sz) * 4) + |
| 4535 | 4 /* eir_server_scope.len */ + |
| 4536 | (XDR_QUADLEN(server_scope_sz) * 4) + |
| 4537 | 4 /* eir_server_impl_id.count (0) */); |
| 4538 | if (!p) |
| 4539 | return nfserr_resource; |
| 4540 | |
| 4541 | /* The server_owner struct */ |
| 4542 | p = xdr_encode_hyper(p, minor_id); /* Minor id */ |
| 4543 | /* major id */ |
| 4544 | p = xdr_encode_opaque(p, major_id, major_id_sz); |
| 4545 | |
| 4546 | /* Server scope */ |
| 4547 | p = xdr_encode_opaque(p, server_scope, server_scope_sz); |
| 4548 | |
| 4549 | /* Implementation id */ |
| 4550 | *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */ |
| 4551 | return 0; |
| 4552 | } |
| 4553 | |
| 4554 | static __be32 |
| 4555 | nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4556 | union nfsd4_op_u *u) |
| 4557 | { |
| 4558 | struct nfsd4_create_session *sess = &u->create_session; |
| 4559 | struct xdr_stream *xdr = resp->xdr; |
| 4560 | __be32 *p; |
| 4561 | |
| 4562 | p = xdr_reserve_space(xdr, 24); |
| 4563 | if (!p) |
| 4564 | return nfserr_resource; |
| 4565 | p = xdr_encode_opaque_fixed(p, sess->sessionid.data, |
| 4566 | NFS4_MAX_SESSIONID_LEN); |
| 4567 | *p++ = cpu_to_be32(sess->seqid); |
| 4568 | *p++ = cpu_to_be32(sess->flags); |
| 4569 | |
| 4570 | p = xdr_reserve_space(xdr, 28); |
| 4571 | if (!p) |
| 4572 | return nfserr_resource; |
| 4573 | *p++ = cpu_to_be32(0); /* headerpadsz */ |
| 4574 | *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz); |
| 4575 | *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz); |
| 4576 | *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached); |
| 4577 | *p++ = cpu_to_be32(sess->fore_channel.maxops); |
| 4578 | *p++ = cpu_to_be32(sess->fore_channel.maxreqs); |
| 4579 | *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs); |
| 4580 | |
| 4581 | if (sess->fore_channel.nr_rdma_attrs) { |
| 4582 | p = xdr_reserve_space(xdr, 4); |
| 4583 | if (!p) |
| 4584 | return nfserr_resource; |
| 4585 | *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs); |
| 4586 | } |
| 4587 | |
| 4588 | p = xdr_reserve_space(xdr, 28); |
| 4589 | if (!p) |
| 4590 | return nfserr_resource; |
| 4591 | *p++ = cpu_to_be32(0); /* headerpadsz */ |
| 4592 | *p++ = cpu_to_be32(sess->back_channel.maxreq_sz); |
| 4593 | *p++ = cpu_to_be32(sess->back_channel.maxresp_sz); |
| 4594 | *p++ = cpu_to_be32(sess->back_channel.maxresp_cached); |
| 4595 | *p++ = cpu_to_be32(sess->back_channel.maxops); |
| 4596 | *p++ = cpu_to_be32(sess->back_channel.maxreqs); |
| 4597 | *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs); |
| 4598 | |
| 4599 | if (sess->back_channel.nr_rdma_attrs) { |
| 4600 | p = xdr_reserve_space(xdr, 4); |
| 4601 | if (!p) |
| 4602 | return nfserr_resource; |
| 4603 | *p++ = cpu_to_be32(sess->back_channel.rdma_attrs); |
| 4604 | } |
| 4605 | return 0; |
| 4606 | } |
| 4607 | |
| 4608 | static __be32 |
| 4609 | nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4610 | union nfsd4_op_u *u) |
| 4611 | { |
| 4612 | struct nfsd4_sequence *seq = &u->sequence; |
| 4613 | struct xdr_stream *xdr = resp->xdr; |
| 4614 | __be32 *p; |
| 4615 | |
| 4616 | p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20); |
| 4617 | if (!p) |
| 4618 | return nfserr_resource; |
| 4619 | p = xdr_encode_opaque_fixed(p, seq->sessionid.data, |
| 4620 | NFS4_MAX_SESSIONID_LEN); |
| 4621 | *p++ = cpu_to_be32(seq->seqid); |
| 4622 | *p++ = cpu_to_be32(seq->slotid); |
| 4623 | /* Note slotid's are numbered from zero: */ |
| 4624 | *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */ |
| 4625 | *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */ |
| 4626 | *p++ = cpu_to_be32(seq->status_flags); |
| 4627 | |
| 4628 | resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */ |
| 4629 | return 0; |
| 4630 | } |
| 4631 | |
| 4632 | static __be32 |
| 4633 | nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4634 | union nfsd4_op_u *u) |
| 4635 | { |
| 4636 | struct nfsd4_test_stateid *test_stateid = &u->test_stateid; |
| 4637 | struct xdr_stream *xdr = resp->xdr; |
| 4638 | struct nfsd4_test_stateid_id *stateid, *next; |
| 4639 | __be32 *p; |
| 4640 | |
| 4641 | p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids)); |
| 4642 | if (!p) |
| 4643 | return nfserr_resource; |
| 4644 | *p++ = htonl(test_stateid->ts_num_ids); |
| 4645 | |
| 4646 | list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { |
| 4647 | *p++ = stateid->ts_id_status; |
| 4648 | } |
| 4649 | |
| 4650 | return 0; |
| 4651 | } |
| 4652 | |
| 4653 | #ifdef CONFIG_NFSD_PNFS |
| 4654 | static __be32 |
| 4655 | nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4656 | union nfsd4_op_u *u) |
| 4657 | { |
| 4658 | struct nfsd4_getdeviceinfo *gdev = &u->getdeviceinfo; |
| 4659 | struct xdr_stream *xdr = resp->xdr; |
| 4660 | const struct nfsd4_layout_ops *ops; |
| 4661 | u32 starting_len = xdr->buf->len, needed_len; |
| 4662 | __be32 *p; |
| 4663 | |
| 4664 | p = xdr_reserve_space(xdr, 4); |
| 4665 | if (!p) |
| 4666 | return nfserr_resource; |
| 4667 | |
| 4668 | *p++ = cpu_to_be32(gdev->gd_layout_type); |
| 4669 | |
| 4670 | /* If maxcount is 0 then just update notifications */ |
| 4671 | if (gdev->gd_maxcount != 0) { |
| 4672 | ops = nfsd4_layout_ops[gdev->gd_layout_type]; |
| 4673 | nfserr = ops->encode_getdeviceinfo(xdr, gdev); |
| 4674 | if (nfserr) { |
| 4675 | /* |
| 4676 | * We don't bother to burden the layout drivers with |
| 4677 | * enforcing gd_maxcount, just tell the client to |
| 4678 | * come back with a bigger buffer if it's not enough. |
| 4679 | */ |
| 4680 | if (xdr->buf->len + 4 > gdev->gd_maxcount) |
| 4681 | goto toosmall; |
| 4682 | return nfserr; |
| 4683 | } |
| 4684 | } |
| 4685 | |
| 4686 | if (gdev->gd_notify_types) { |
| 4687 | p = xdr_reserve_space(xdr, 4 + 4); |
| 4688 | if (!p) |
| 4689 | return nfserr_resource; |
| 4690 | *p++ = cpu_to_be32(1); /* bitmap length */ |
| 4691 | *p++ = cpu_to_be32(gdev->gd_notify_types); |
| 4692 | } else { |
| 4693 | p = xdr_reserve_space(xdr, 4); |
| 4694 | if (!p) |
| 4695 | return nfserr_resource; |
| 4696 | *p++ = 0; |
| 4697 | } |
| 4698 | |
| 4699 | return 0; |
| 4700 | toosmall: |
| 4701 | dprintk("%s: maxcount too small\n", __func__); |
| 4702 | needed_len = xdr->buf->len + 4 /* notifications */; |
| 4703 | xdr_truncate_encode(xdr, starting_len); |
| 4704 | p = xdr_reserve_space(xdr, 4); |
| 4705 | if (!p) |
| 4706 | return nfserr_resource; |
| 4707 | *p++ = cpu_to_be32(needed_len); |
| 4708 | return nfserr_toosmall; |
| 4709 | } |
| 4710 | |
| 4711 | static __be32 |
| 4712 | nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4713 | union nfsd4_op_u *u) |
| 4714 | { |
| 4715 | struct nfsd4_layoutget *lgp = &u->layoutget; |
| 4716 | struct xdr_stream *xdr = resp->xdr; |
| 4717 | const struct nfsd4_layout_ops *ops; |
| 4718 | __be32 *p; |
| 4719 | |
| 4720 | p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t)); |
| 4721 | if (!p) |
| 4722 | return nfserr_resource; |
| 4723 | |
| 4724 | *p++ = cpu_to_be32(1); /* we always set return-on-close */ |
| 4725 | *p++ = cpu_to_be32(lgp->lg_sid.si_generation); |
| 4726 | p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque, |
| 4727 | sizeof(stateid_opaque_t)); |
| 4728 | |
| 4729 | *p++ = cpu_to_be32(1); /* we always return a single layout */ |
| 4730 | p = xdr_encode_hyper(p, lgp->lg_seg.offset); |
| 4731 | p = xdr_encode_hyper(p, lgp->lg_seg.length); |
| 4732 | *p++ = cpu_to_be32(lgp->lg_seg.iomode); |
| 4733 | *p++ = cpu_to_be32(lgp->lg_layout_type); |
| 4734 | |
| 4735 | ops = nfsd4_layout_ops[lgp->lg_layout_type]; |
| 4736 | return ops->encode_layoutget(xdr, lgp); |
| 4737 | } |
| 4738 | |
| 4739 | static __be32 |
| 4740 | nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4741 | union nfsd4_op_u *u) |
| 4742 | { |
| 4743 | struct nfsd4_layoutcommit *lcp = &u->layoutcommit; |
| 4744 | struct xdr_stream *xdr = resp->xdr; |
| 4745 | __be32 *p; |
| 4746 | |
| 4747 | p = xdr_reserve_space(xdr, 4); |
| 4748 | if (!p) |
| 4749 | return nfserr_resource; |
| 4750 | *p++ = cpu_to_be32(lcp->lc_size_chg); |
| 4751 | if (lcp->lc_size_chg) { |
| 4752 | p = xdr_reserve_space(xdr, 8); |
| 4753 | if (!p) |
| 4754 | return nfserr_resource; |
| 4755 | p = xdr_encode_hyper(p, lcp->lc_newsize); |
| 4756 | } |
| 4757 | |
| 4758 | return 0; |
| 4759 | } |
| 4760 | |
| 4761 | static __be32 |
| 4762 | nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4763 | union nfsd4_op_u *u) |
| 4764 | { |
| 4765 | struct nfsd4_layoutreturn *lrp = &u->layoutreturn; |
| 4766 | struct xdr_stream *xdr = resp->xdr; |
| 4767 | __be32 *p; |
| 4768 | |
| 4769 | p = xdr_reserve_space(xdr, 4); |
| 4770 | if (!p) |
| 4771 | return nfserr_resource; |
| 4772 | *p++ = cpu_to_be32(lrp->lrs_present); |
| 4773 | if (lrp->lrs_present) |
| 4774 | return nfsd4_encode_stateid(xdr, &lrp->lr_sid); |
| 4775 | return 0; |
| 4776 | } |
| 4777 | #endif /* CONFIG_NFSD_PNFS */ |
| 4778 | |
| 4779 | static __be32 |
| 4780 | nfsd42_encode_write_res(struct nfsd4_compoundres *resp, |
| 4781 | struct nfsd42_write_res *write, bool sync) |
| 4782 | { |
| 4783 | __be32 *p; |
| 4784 | p = xdr_reserve_space(resp->xdr, 4); |
| 4785 | if (!p) |
| 4786 | return nfserr_resource; |
| 4787 | |
| 4788 | if (sync) |
| 4789 | *p++ = cpu_to_be32(0); |
| 4790 | else { |
| 4791 | __be32 nfserr; |
| 4792 | *p++ = cpu_to_be32(1); |
| 4793 | nfserr = nfsd4_encode_stateid(resp->xdr, &write->cb_stateid); |
| 4794 | if (nfserr) |
| 4795 | return nfserr; |
| 4796 | } |
| 4797 | p = xdr_reserve_space(resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE); |
| 4798 | if (!p) |
| 4799 | return nfserr_resource; |
| 4800 | |
| 4801 | p = xdr_encode_hyper(p, write->wr_bytes_written); |
| 4802 | *p++ = cpu_to_be32(write->wr_stable_how); |
| 4803 | p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, |
| 4804 | NFS4_VERIFIER_SIZE); |
| 4805 | return nfs_ok; |
| 4806 | } |
| 4807 | |
| 4808 | static __be32 |
| 4809 | nfsd42_encode_nl4_server(struct nfsd4_compoundres *resp, struct nl4_server *ns) |
| 4810 | { |
| 4811 | struct xdr_stream *xdr = resp->xdr; |
| 4812 | struct nfs42_netaddr *addr; |
| 4813 | __be32 *p; |
| 4814 | |
| 4815 | p = xdr_reserve_space(xdr, 4); |
| 4816 | *p++ = cpu_to_be32(ns->nl4_type); |
| 4817 | |
| 4818 | switch (ns->nl4_type) { |
| 4819 | case NL4_NETADDR: |
| 4820 | addr = &ns->u.nl4_addr; |
| 4821 | |
| 4822 | /* netid_len, netid, uaddr_len, uaddr (port included |
| 4823 | * in RPCBIND_MAXUADDRLEN) |
| 4824 | */ |
| 4825 | p = xdr_reserve_space(xdr, |
| 4826 | 4 /* netid len */ + |
| 4827 | (XDR_QUADLEN(addr->netid_len) * 4) + |
| 4828 | 4 /* uaddr len */ + |
| 4829 | (XDR_QUADLEN(addr->addr_len) * 4)); |
| 4830 | if (!p) |
| 4831 | return nfserr_resource; |
| 4832 | |
| 4833 | *p++ = cpu_to_be32(addr->netid_len); |
| 4834 | p = xdr_encode_opaque_fixed(p, addr->netid, |
| 4835 | addr->netid_len); |
| 4836 | *p++ = cpu_to_be32(addr->addr_len); |
| 4837 | p = xdr_encode_opaque_fixed(p, addr->addr, |
| 4838 | addr->addr_len); |
| 4839 | break; |
| 4840 | default: |
| 4841 | WARN_ON_ONCE(ns->nl4_type != NL4_NETADDR); |
| 4842 | return nfserr_inval; |
| 4843 | } |
| 4844 | |
| 4845 | return 0; |
| 4846 | } |
| 4847 | |
| 4848 | static __be32 |
| 4849 | nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4850 | union nfsd4_op_u *u) |
| 4851 | { |
| 4852 | struct nfsd4_copy *copy = &u->copy; |
| 4853 | __be32 *p; |
| 4854 | |
| 4855 | nfserr = nfsd42_encode_write_res(resp, ©->cp_res, |
| 4856 | nfsd4_copy_is_sync(copy)); |
| 4857 | if (nfserr) |
| 4858 | return nfserr; |
| 4859 | |
| 4860 | p = xdr_reserve_space(resp->xdr, 4 + 4); |
| 4861 | *p++ = xdr_one; /* cr_consecutive */ |
| 4862 | *p = nfsd4_copy_is_sync(copy) ? xdr_one : xdr_zero; |
| 4863 | return 0; |
| 4864 | } |
| 4865 | |
| 4866 | static __be32 |
| 4867 | nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4868 | union nfsd4_op_u *u) |
| 4869 | { |
| 4870 | struct nfsd4_offload_status *os = &u->offload_status; |
| 4871 | struct xdr_stream *xdr = resp->xdr; |
| 4872 | __be32 *p; |
| 4873 | |
| 4874 | p = xdr_reserve_space(xdr, 8 + 4); |
| 4875 | if (!p) |
| 4876 | return nfserr_resource; |
| 4877 | p = xdr_encode_hyper(p, os->count); |
| 4878 | *p++ = cpu_to_be32(0); |
| 4879 | return nfserr; |
| 4880 | } |
| 4881 | |
| 4882 | static __be32 |
| 4883 | nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp, |
| 4884 | struct nfsd4_read *read) |
| 4885 | { |
| 4886 | bool splice_ok = test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags); |
| 4887 | struct file *file = read->rd_nf->nf_file; |
| 4888 | struct xdr_stream *xdr = resp->xdr; |
| 4889 | unsigned long maxcount; |
| 4890 | __be32 nfserr, *p; |
| 4891 | |
| 4892 | /* Content type, offset, byte count */ |
| 4893 | p = xdr_reserve_space(xdr, 4 + 8 + 4); |
| 4894 | if (!p) |
| 4895 | return nfserr_io; |
| 4896 | if (resp->xdr->buf->page_len && splice_ok) { |
| 4897 | WARN_ON_ONCE(splice_ok); |
| 4898 | return nfserr_serverfault; |
| 4899 | } |
| 4900 | |
| 4901 | maxcount = min_t(unsigned long, read->rd_length, |
| 4902 | (xdr->buf->buflen - xdr->buf->len)); |
| 4903 | |
| 4904 | if (file->f_op->splice_read && splice_ok) |
| 4905 | nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount); |
| 4906 | else |
| 4907 | nfserr = nfsd4_encode_readv(resp, read, file, maxcount); |
| 4908 | if (nfserr) |
| 4909 | return nfserr; |
| 4910 | |
| 4911 | *p++ = cpu_to_be32(NFS4_CONTENT_DATA); |
| 4912 | p = xdr_encode_hyper(p, read->rd_offset); |
| 4913 | *p = cpu_to_be32(read->rd_length); |
| 4914 | |
| 4915 | return nfs_ok; |
| 4916 | } |
| 4917 | |
| 4918 | static __be32 |
| 4919 | nfsd4_encode_read_plus(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4920 | union nfsd4_op_u *u) |
| 4921 | { |
| 4922 | struct nfsd4_read *read = &u->read; |
| 4923 | struct file *file = read->rd_nf->nf_file; |
| 4924 | struct xdr_stream *xdr = resp->xdr; |
| 4925 | int starting_len = xdr->buf->len; |
| 4926 | u32 segments = 0; |
| 4927 | __be32 *p; |
| 4928 | |
| 4929 | if (nfserr) |
| 4930 | return nfserr; |
| 4931 | |
| 4932 | /* eof flag, segment count */ |
| 4933 | p = xdr_reserve_space(xdr, 4 + 4); |
| 4934 | if (!p) |
| 4935 | return nfserr_io; |
| 4936 | xdr_commit_encode(xdr); |
| 4937 | |
| 4938 | read->rd_eof = read->rd_offset >= i_size_read(file_inode(file)); |
| 4939 | if (read->rd_eof) |
| 4940 | goto out; |
| 4941 | |
| 4942 | nfserr = nfsd4_encode_read_plus_data(resp, read); |
| 4943 | if (nfserr) { |
| 4944 | xdr_truncate_encode(xdr, starting_len); |
| 4945 | return nfserr; |
| 4946 | } |
| 4947 | |
| 4948 | segments++; |
| 4949 | |
| 4950 | out: |
| 4951 | p = xdr_encode_bool(p, read->rd_eof); |
| 4952 | *p = cpu_to_be32(segments); |
| 4953 | return nfserr; |
| 4954 | } |
| 4955 | |
| 4956 | static __be32 |
| 4957 | nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4958 | union nfsd4_op_u *u) |
| 4959 | { |
| 4960 | struct nfsd4_copy_notify *cn = &u->copy_notify; |
| 4961 | struct xdr_stream *xdr = resp->xdr; |
| 4962 | __be32 *p; |
| 4963 | |
| 4964 | if (nfserr) |
| 4965 | return nfserr; |
| 4966 | |
| 4967 | /* 8 sec, 4 nsec */ |
| 4968 | p = xdr_reserve_space(xdr, 12); |
| 4969 | if (!p) |
| 4970 | return nfserr_resource; |
| 4971 | |
| 4972 | /* cnr_lease_time */ |
| 4973 | p = xdr_encode_hyper(p, cn->cpn_sec); |
| 4974 | *p++ = cpu_to_be32(cn->cpn_nsec); |
| 4975 | |
| 4976 | /* cnr_stateid */ |
| 4977 | nfserr = nfsd4_encode_stateid(xdr, &cn->cpn_cnr_stateid); |
| 4978 | if (nfserr) |
| 4979 | return nfserr; |
| 4980 | |
| 4981 | /* cnr_src.nl_nsvr */ |
| 4982 | p = xdr_reserve_space(xdr, 4); |
| 4983 | if (!p) |
| 4984 | return nfserr_resource; |
| 4985 | |
| 4986 | *p++ = cpu_to_be32(1); |
| 4987 | |
| 4988 | nfserr = nfsd42_encode_nl4_server(resp, cn->cpn_src); |
| 4989 | return nfserr; |
| 4990 | } |
| 4991 | |
| 4992 | static __be32 |
| 4993 | nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 4994 | union nfsd4_op_u *u) |
| 4995 | { |
| 4996 | struct nfsd4_seek *seek = &u->seek; |
| 4997 | __be32 *p; |
| 4998 | |
| 4999 | p = xdr_reserve_space(resp->xdr, 4 + 8); |
| 5000 | *p++ = cpu_to_be32(seek->seek_eof); |
| 5001 | p = xdr_encode_hyper(p, seek->seek_pos); |
| 5002 | |
| 5003 | return 0; |
| 5004 | } |
| 5005 | |
| 5006 | static __be32 |
| 5007 | nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 5008 | union nfsd4_op_u *p) |
| 5009 | { |
| 5010 | return nfserr; |
| 5011 | } |
| 5012 | |
| 5013 | /* |
| 5014 | * Encode kmalloc-ed buffer in to XDR stream. |
| 5015 | */ |
| 5016 | static __be32 |
| 5017 | nfsd4_vbuf_to_stream(struct xdr_stream *xdr, char *buf, u32 buflen) |
| 5018 | { |
| 5019 | u32 cplen; |
| 5020 | __be32 *p; |
| 5021 | |
| 5022 | cplen = min_t(unsigned long, buflen, |
| 5023 | ((void *)xdr->end - (void *)xdr->p)); |
| 5024 | p = xdr_reserve_space(xdr, cplen); |
| 5025 | if (!p) |
| 5026 | return nfserr_resource; |
| 5027 | |
| 5028 | memcpy(p, buf, cplen); |
| 5029 | buf += cplen; |
| 5030 | buflen -= cplen; |
| 5031 | |
| 5032 | while (buflen) { |
| 5033 | cplen = min_t(u32, buflen, PAGE_SIZE); |
| 5034 | p = xdr_reserve_space(xdr, cplen); |
| 5035 | if (!p) |
| 5036 | return nfserr_resource; |
| 5037 | |
| 5038 | memcpy(p, buf, cplen); |
| 5039 | |
| 5040 | if (cplen < PAGE_SIZE) { |
| 5041 | /* |
| 5042 | * We're done, with a length that wasn't page |
| 5043 | * aligned, so possibly not word aligned. Pad |
| 5044 | * any trailing bytes with 0. |
| 5045 | */ |
| 5046 | xdr_encode_opaque_fixed(p, NULL, cplen); |
| 5047 | break; |
| 5048 | } |
| 5049 | |
| 5050 | buflen -= PAGE_SIZE; |
| 5051 | buf += PAGE_SIZE; |
| 5052 | } |
| 5053 | |
| 5054 | return 0; |
| 5055 | } |
| 5056 | |
| 5057 | static __be32 |
| 5058 | nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 5059 | union nfsd4_op_u *u) |
| 5060 | { |
| 5061 | struct nfsd4_getxattr *getxattr = &u->getxattr; |
| 5062 | struct xdr_stream *xdr = resp->xdr; |
| 5063 | __be32 *p, err; |
| 5064 | |
| 5065 | p = xdr_reserve_space(xdr, 4); |
| 5066 | if (!p) |
| 5067 | return nfserr_resource; |
| 5068 | |
| 5069 | *p = cpu_to_be32(getxattr->getxa_len); |
| 5070 | |
| 5071 | if (getxattr->getxa_len == 0) |
| 5072 | return 0; |
| 5073 | |
| 5074 | err = nfsd4_vbuf_to_stream(xdr, getxattr->getxa_buf, |
| 5075 | getxattr->getxa_len); |
| 5076 | |
| 5077 | kvfree(getxattr->getxa_buf); |
| 5078 | |
| 5079 | return err; |
| 5080 | } |
| 5081 | |
| 5082 | static __be32 |
| 5083 | nfsd4_encode_setxattr(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 5084 | union nfsd4_op_u *u) |
| 5085 | { |
| 5086 | struct nfsd4_setxattr *setxattr = &u->setxattr; |
| 5087 | struct xdr_stream *xdr = resp->xdr; |
| 5088 | __be32 *p; |
| 5089 | |
| 5090 | p = xdr_reserve_space(xdr, 20); |
| 5091 | if (!p) |
| 5092 | return nfserr_resource; |
| 5093 | |
| 5094 | encode_cinfo(p, &setxattr->setxa_cinfo); |
| 5095 | |
| 5096 | return 0; |
| 5097 | } |
| 5098 | |
| 5099 | /* |
| 5100 | * See if there are cookie values that can be rejected outright. |
| 5101 | */ |
| 5102 | static __be32 |
| 5103 | nfsd4_listxattr_validate_cookie(struct nfsd4_listxattrs *listxattrs, |
| 5104 | u32 *offsetp) |
| 5105 | { |
| 5106 | u64 cookie = listxattrs->lsxa_cookie; |
| 5107 | |
| 5108 | /* |
| 5109 | * If the cookie is larger than the maximum number we can fit |
| 5110 | * in either the buffer we just got back from vfs_listxattr, or, |
| 5111 | * XDR-encoded, in the return buffer, it's invalid. |
| 5112 | */ |
| 5113 | if (cookie > (listxattrs->lsxa_len) / (XATTR_USER_PREFIX_LEN + 2)) |
| 5114 | return nfserr_badcookie; |
| 5115 | |
| 5116 | if (cookie > (listxattrs->lsxa_maxcount / |
| 5117 | (XDR_QUADLEN(XATTR_USER_PREFIX_LEN + 2) + 4))) |
| 5118 | return nfserr_badcookie; |
| 5119 | |
| 5120 | *offsetp = (u32)cookie; |
| 5121 | return 0; |
| 5122 | } |
| 5123 | |
| 5124 | static __be32 |
| 5125 | nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 5126 | union nfsd4_op_u *u) |
| 5127 | { |
| 5128 | struct nfsd4_listxattrs *listxattrs = &u->listxattrs; |
| 5129 | struct xdr_stream *xdr = resp->xdr; |
| 5130 | u32 cookie_offset, count_offset, eof; |
| 5131 | u32 left, xdrleft, slen, count; |
| 5132 | u32 xdrlen, offset; |
| 5133 | u64 cookie; |
| 5134 | char *sp; |
| 5135 | __be32 status, tmp; |
| 5136 | __be32 *p; |
| 5137 | u32 nuser; |
| 5138 | |
| 5139 | eof = 1; |
| 5140 | |
| 5141 | status = nfsd4_listxattr_validate_cookie(listxattrs, &offset); |
| 5142 | if (status) |
| 5143 | goto out; |
| 5144 | |
| 5145 | /* |
| 5146 | * Reserve space for the cookie and the name array count. Record |
| 5147 | * the offsets to save them later. |
| 5148 | */ |
| 5149 | cookie_offset = xdr->buf->len; |
| 5150 | count_offset = cookie_offset + 8; |
| 5151 | p = xdr_reserve_space(xdr, 12); |
| 5152 | if (!p) { |
| 5153 | status = nfserr_resource; |
| 5154 | goto out; |
| 5155 | } |
| 5156 | |
| 5157 | count = 0; |
| 5158 | left = listxattrs->lsxa_len; |
| 5159 | sp = listxattrs->lsxa_buf; |
| 5160 | nuser = 0; |
| 5161 | |
| 5162 | xdrleft = listxattrs->lsxa_maxcount; |
| 5163 | |
| 5164 | while (left > 0 && xdrleft > 0) { |
| 5165 | slen = strlen(sp); |
| 5166 | |
| 5167 | /* |
| 5168 | * Check if this is a "user." attribute, skip it if not. |
| 5169 | */ |
| 5170 | if (strncmp(sp, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) |
| 5171 | goto contloop; |
| 5172 | |
| 5173 | slen -= XATTR_USER_PREFIX_LEN; |
| 5174 | xdrlen = 4 + ((slen + 3) & ~3); |
| 5175 | if (xdrlen > xdrleft) { |
| 5176 | if (count == 0) { |
| 5177 | /* |
| 5178 | * Can't even fit the first attribute name. |
| 5179 | */ |
| 5180 | status = nfserr_toosmall; |
| 5181 | goto out; |
| 5182 | } |
| 5183 | eof = 0; |
| 5184 | goto wreof; |
| 5185 | } |
| 5186 | |
| 5187 | left -= XATTR_USER_PREFIX_LEN; |
| 5188 | sp += XATTR_USER_PREFIX_LEN; |
| 5189 | if (nuser++ < offset) |
| 5190 | goto contloop; |
| 5191 | |
| 5192 | |
| 5193 | p = xdr_reserve_space(xdr, xdrlen); |
| 5194 | if (!p) { |
| 5195 | status = nfserr_resource; |
| 5196 | goto out; |
| 5197 | } |
| 5198 | |
| 5199 | xdr_encode_opaque(p, sp, slen); |
| 5200 | |
| 5201 | xdrleft -= xdrlen; |
| 5202 | count++; |
| 5203 | contloop: |
| 5204 | sp += slen + 1; |
| 5205 | left -= slen + 1; |
| 5206 | } |
| 5207 | |
| 5208 | /* |
| 5209 | * If there were user attributes to copy, but we didn't copy |
| 5210 | * any, the offset was too large (e.g. the cookie was invalid). |
| 5211 | */ |
| 5212 | if (nuser > 0 && count == 0) { |
| 5213 | status = nfserr_badcookie; |
| 5214 | goto out; |
| 5215 | } |
| 5216 | |
| 5217 | wreof: |
| 5218 | p = xdr_reserve_space(xdr, 4); |
| 5219 | if (!p) { |
| 5220 | status = nfserr_resource; |
| 5221 | goto out; |
| 5222 | } |
| 5223 | *p = cpu_to_be32(eof); |
| 5224 | |
| 5225 | cookie = offset + count; |
| 5226 | |
| 5227 | write_bytes_to_xdr_buf(xdr->buf, cookie_offset, &cookie, 8); |
| 5228 | tmp = cpu_to_be32(count); |
| 5229 | write_bytes_to_xdr_buf(xdr->buf, count_offset, &tmp, 4); |
| 5230 | out: |
| 5231 | if (listxattrs->lsxa_len) |
| 5232 | kvfree(listxattrs->lsxa_buf); |
| 5233 | return status; |
| 5234 | } |
| 5235 | |
| 5236 | static __be32 |
| 5237 | nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr, |
| 5238 | union nfsd4_op_u *u) |
| 5239 | { |
| 5240 | struct nfsd4_removexattr *removexattr = &u->removexattr; |
| 5241 | struct xdr_stream *xdr = resp->xdr; |
| 5242 | __be32 *p; |
| 5243 | |
| 5244 | p = xdr_reserve_space(xdr, 20); |
| 5245 | if (!p) |
| 5246 | return nfserr_resource; |
| 5247 | |
| 5248 | p = encode_cinfo(p, &removexattr->rmxa_cinfo); |
| 5249 | return 0; |
| 5250 | } |
| 5251 | |
| 5252 | typedef __be32(*nfsd4_enc)(struct nfsd4_compoundres *, __be32, union nfsd4_op_u *u); |
| 5253 | |
| 5254 | /* |
| 5255 | * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 |
| 5256 | * since we don't need to filter out obsolete ops as this is |
| 5257 | * done in the decoding phase. |
| 5258 | */ |
| 5259 | static const nfsd4_enc nfsd4_enc_ops[] = { |
| 5260 | [OP_ACCESS] = nfsd4_encode_access, |
| 5261 | [OP_CLOSE] = nfsd4_encode_close, |
| 5262 | [OP_COMMIT] = nfsd4_encode_commit, |
| 5263 | [OP_CREATE] = nfsd4_encode_create, |
| 5264 | [OP_DELEGPURGE] = nfsd4_encode_noop, |
| 5265 | [OP_DELEGRETURN] = nfsd4_encode_noop, |
| 5266 | [OP_GETATTR] = nfsd4_encode_getattr, |
| 5267 | [OP_GETFH] = nfsd4_encode_getfh, |
| 5268 | [OP_LINK] = nfsd4_encode_link, |
| 5269 | [OP_LOCK] = nfsd4_encode_lock, |
| 5270 | [OP_LOCKT] = nfsd4_encode_lockt, |
| 5271 | [OP_LOCKU] = nfsd4_encode_locku, |
| 5272 | [OP_LOOKUP] = nfsd4_encode_noop, |
| 5273 | [OP_LOOKUPP] = nfsd4_encode_noop, |
| 5274 | [OP_NVERIFY] = nfsd4_encode_noop, |
| 5275 | [OP_OPEN] = nfsd4_encode_open, |
| 5276 | [OP_OPENATTR] = nfsd4_encode_noop, |
| 5277 | [OP_OPEN_CONFIRM] = nfsd4_encode_open_confirm, |
| 5278 | [OP_OPEN_DOWNGRADE] = nfsd4_encode_open_downgrade, |
| 5279 | [OP_PUTFH] = nfsd4_encode_noop, |
| 5280 | [OP_PUTPUBFH] = nfsd4_encode_noop, |
| 5281 | [OP_PUTROOTFH] = nfsd4_encode_noop, |
| 5282 | [OP_READ] = nfsd4_encode_read, |
| 5283 | [OP_READDIR] = nfsd4_encode_readdir, |
| 5284 | [OP_READLINK] = nfsd4_encode_readlink, |
| 5285 | [OP_REMOVE] = nfsd4_encode_remove, |
| 5286 | [OP_RENAME] = nfsd4_encode_rename, |
| 5287 | [OP_RENEW] = nfsd4_encode_noop, |
| 5288 | [OP_RESTOREFH] = nfsd4_encode_noop, |
| 5289 | [OP_SAVEFH] = nfsd4_encode_noop, |
| 5290 | [OP_SECINFO] = nfsd4_encode_secinfo, |
| 5291 | [OP_SETATTR] = nfsd4_encode_setattr, |
| 5292 | [OP_SETCLIENTID] = nfsd4_encode_setclientid, |
| 5293 | [OP_SETCLIENTID_CONFIRM] = nfsd4_encode_noop, |
| 5294 | [OP_VERIFY] = nfsd4_encode_noop, |
| 5295 | [OP_WRITE] = nfsd4_encode_write, |
| 5296 | [OP_RELEASE_LOCKOWNER] = nfsd4_encode_noop, |
| 5297 | |
| 5298 | /* NFSv4.1 operations */ |
| 5299 | [OP_BACKCHANNEL_CTL] = nfsd4_encode_noop, |
| 5300 | [OP_BIND_CONN_TO_SESSION] = nfsd4_encode_bind_conn_to_session, |
| 5301 | [OP_EXCHANGE_ID] = nfsd4_encode_exchange_id, |
| 5302 | [OP_CREATE_SESSION] = nfsd4_encode_create_session, |
| 5303 | [OP_DESTROY_SESSION] = nfsd4_encode_noop, |
| 5304 | [OP_FREE_STATEID] = nfsd4_encode_noop, |
| 5305 | [OP_GET_DIR_DELEGATION] = nfsd4_encode_noop, |
| 5306 | #ifdef CONFIG_NFSD_PNFS |
| 5307 | [OP_GETDEVICEINFO] = nfsd4_encode_getdeviceinfo, |
| 5308 | [OP_GETDEVICELIST] = nfsd4_encode_noop, |
| 5309 | [OP_LAYOUTCOMMIT] = nfsd4_encode_layoutcommit, |
| 5310 | [OP_LAYOUTGET] = nfsd4_encode_layoutget, |
| 5311 | [OP_LAYOUTRETURN] = nfsd4_encode_layoutreturn, |
| 5312 | #else |
| 5313 | [OP_GETDEVICEINFO] = nfsd4_encode_noop, |
| 5314 | [OP_GETDEVICELIST] = nfsd4_encode_noop, |
| 5315 | [OP_LAYOUTCOMMIT] = nfsd4_encode_noop, |
| 5316 | [OP_LAYOUTGET] = nfsd4_encode_noop, |
| 5317 | [OP_LAYOUTRETURN] = nfsd4_encode_noop, |
| 5318 | #endif |
| 5319 | [OP_SECINFO_NO_NAME] = nfsd4_encode_secinfo_no_name, |
| 5320 | [OP_SEQUENCE] = nfsd4_encode_sequence, |
| 5321 | [OP_SET_SSV] = nfsd4_encode_noop, |
| 5322 | [OP_TEST_STATEID] = nfsd4_encode_test_stateid, |
| 5323 | [OP_WANT_DELEGATION] = nfsd4_encode_noop, |
| 5324 | [OP_DESTROY_CLIENTID] = nfsd4_encode_noop, |
| 5325 | [OP_RECLAIM_COMPLETE] = nfsd4_encode_noop, |
| 5326 | |
| 5327 | /* NFSv4.2 operations */ |
| 5328 | [OP_ALLOCATE] = nfsd4_encode_noop, |
| 5329 | [OP_COPY] = nfsd4_encode_copy, |
| 5330 | [OP_COPY_NOTIFY] = nfsd4_encode_copy_notify, |
| 5331 | [OP_DEALLOCATE] = nfsd4_encode_noop, |
| 5332 | [OP_IO_ADVISE] = nfsd4_encode_noop, |
| 5333 | [OP_LAYOUTERROR] = nfsd4_encode_noop, |
| 5334 | [OP_LAYOUTSTATS] = nfsd4_encode_noop, |
| 5335 | [OP_OFFLOAD_CANCEL] = nfsd4_encode_noop, |
| 5336 | [OP_OFFLOAD_STATUS] = nfsd4_encode_offload_status, |
| 5337 | [OP_READ_PLUS] = nfsd4_encode_read_plus, |
| 5338 | [OP_SEEK] = nfsd4_encode_seek, |
| 5339 | [OP_WRITE_SAME] = nfsd4_encode_noop, |
| 5340 | [OP_CLONE] = nfsd4_encode_noop, |
| 5341 | |
| 5342 | /* RFC 8276 extended atributes operations */ |
| 5343 | [OP_GETXATTR] = nfsd4_encode_getxattr, |
| 5344 | [OP_SETXATTR] = nfsd4_encode_setxattr, |
| 5345 | [OP_LISTXATTRS] = nfsd4_encode_listxattrs, |
| 5346 | [OP_REMOVEXATTR] = nfsd4_encode_removexattr, |
| 5347 | }; |
| 5348 | |
| 5349 | /* |
| 5350 | * Calculate whether we still have space to encode repsize bytes. |
| 5351 | * There are two considerations: |
| 5352 | * - For NFS versions >=4.1, the size of the reply must stay within |
| 5353 | * session limits |
| 5354 | * - For all NFS versions, we must stay within limited preallocated |
| 5355 | * buffer space. |
| 5356 | * |
| 5357 | * This is called before the operation is processed, so can only provide |
| 5358 | * an upper estimate. For some nonidempotent operations (such as |
| 5359 | * getattr), it's not necessarily a problem if that estimate is wrong, |
| 5360 | * as we can fail it after processing without significant side effects. |
| 5361 | */ |
| 5362 | __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize) |
| 5363 | { |
| 5364 | struct xdr_buf *buf = &resp->rqstp->rq_res; |
| 5365 | struct nfsd4_slot *slot = resp->cstate.slot; |
| 5366 | |
| 5367 | if (buf->len + respsize <= buf->buflen) |
| 5368 | return nfs_ok; |
| 5369 | if (!nfsd4_has_session(&resp->cstate)) |
| 5370 | return nfserr_resource; |
| 5371 | if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) { |
| 5372 | WARN_ON_ONCE(1); |
| 5373 | return nfserr_rep_too_big_to_cache; |
| 5374 | } |
| 5375 | return nfserr_rep_too_big; |
| 5376 | } |
| 5377 | |
| 5378 | void |
| 5379 | nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) |
| 5380 | { |
| 5381 | struct xdr_stream *xdr = resp->xdr; |
| 5382 | struct nfs4_stateowner *so = resp->cstate.replay_owner; |
| 5383 | struct svc_rqst *rqstp = resp->rqstp; |
| 5384 | const struct nfsd4_operation *opdesc = op->opdesc; |
| 5385 | int post_err_offset; |
| 5386 | nfsd4_enc encoder; |
| 5387 | __be32 *p; |
| 5388 | |
| 5389 | p = xdr_reserve_space(xdr, 8); |
| 5390 | if (!p) { |
| 5391 | WARN_ON_ONCE(1); |
| 5392 | return; |
| 5393 | } |
| 5394 | *p++ = cpu_to_be32(op->opnum); |
| 5395 | post_err_offset = xdr->buf->len; |
| 5396 | |
| 5397 | if (op->opnum == OP_ILLEGAL) |
| 5398 | goto status; |
| 5399 | if (op->status && opdesc && |
| 5400 | !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE)) |
| 5401 | goto status; |
| 5402 | BUG_ON(op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || |
| 5403 | !nfsd4_enc_ops[op->opnum]); |
| 5404 | encoder = nfsd4_enc_ops[op->opnum]; |
| 5405 | op->status = encoder(resp, op->status, &op->u); |
| 5406 | if (op->status) |
| 5407 | trace_nfsd_compound_encode_err(rqstp, op->opnum, op->status); |
| 5408 | if (opdesc && opdesc->op_release) |
| 5409 | opdesc->op_release(&op->u); |
| 5410 | xdr_commit_encode(xdr); |
| 5411 | |
| 5412 | /* nfsd4_check_resp_size guarantees enough room for error status */ |
| 5413 | if (!op->status) { |
| 5414 | int space_needed = 0; |
| 5415 | if (!nfsd4_last_compound_op(rqstp)) |
| 5416 | space_needed = COMPOUND_ERR_SLACK_SPACE; |
| 5417 | op->status = nfsd4_check_resp_size(resp, space_needed); |
| 5418 | } |
| 5419 | if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) { |
| 5420 | struct nfsd4_slot *slot = resp->cstate.slot; |
| 5421 | |
| 5422 | if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) |
| 5423 | op->status = nfserr_rep_too_big_to_cache; |
| 5424 | else |
| 5425 | op->status = nfserr_rep_too_big; |
| 5426 | } |
| 5427 | if (op->status == nfserr_resource || |
| 5428 | op->status == nfserr_rep_too_big || |
| 5429 | op->status == nfserr_rep_too_big_to_cache) { |
| 5430 | /* |
| 5431 | * The operation may have already been encoded or |
| 5432 | * partially encoded. No op returns anything additional |
| 5433 | * in the case of one of these three errors, so we can |
| 5434 | * just truncate back to after the status. But it's a |
| 5435 | * bug if we had to do this on a non-idempotent op: |
| 5436 | */ |
| 5437 | warn_on_nonidempotent_op(op); |
| 5438 | xdr_truncate_encode(xdr, post_err_offset); |
| 5439 | } |
| 5440 | if (so) { |
| 5441 | int len = xdr->buf->len - post_err_offset; |
| 5442 | |
| 5443 | so->so_replay.rp_status = op->status; |
| 5444 | so->so_replay.rp_buflen = len; |
| 5445 | read_bytes_from_xdr_buf(xdr->buf, post_err_offset, |
| 5446 | so->so_replay.rp_buf, len); |
| 5447 | } |
| 5448 | status: |
| 5449 | *p = op->status; |
| 5450 | } |
| 5451 | |
| 5452 | /* |
| 5453 | * Encode the reply stored in the stateowner reply cache |
| 5454 | * |
| 5455 | * XDR note: do not encode rp->rp_buflen: the buffer contains the |
| 5456 | * previously sent already encoded operation. |
| 5457 | */ |
| 5458 | void |
| 5459 | nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op) |
| 5460 | { |
| 5461 | __be32 *p; |
| 5462 | struct nfs4_replay *rp = op->replay; |
| 5463 | |
| 5464 | p = xdr_reserve_space(xdr, 8 + rp->rp_buflen); |
| 5465 | if (!p) { |
| 5466 | WARN_ON_ONCE(1); |
| 5467 | return; |
| 5468 | } |
| 5469 | *p++ = cpu_to_be32(op->opnum); |
| 5470 | *p++ = rp->rp_status; /* already xdr'ed */ |
| 5471 | |
| 5472 | p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen); |
| 5473 | } |
| 5474 | |
| 5475 | void nfsd4_release_compoundargs(struct svc_rqst *rqstp) |
| 5476 | { |
| 5477 | struct nfsd4_compoundargs *args = rqstp->rq_argp; |
| 5478 | |
| 5479 | if (args->ops != args->iops) { |
| 5480 | vfree(args->ops); |
| 5481 | args->ops = args->iops; |
| 5482 | } |
| 5483 | while (args->to_free) { |
| 5484 | struct svcxdr_tmpbuf *tb = args->to_free; |
| 5485 | args->to_free = tb->next; |
| 5486 | kfree(tb); |
| 5487 | } |
| 5488 | } |
| 5489 | |
| 5490 | bool |
| 5491 | nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
| 5492 | { |
| 5493 | struct nfsd4_compoundargs *args = rqstp->rq_argp; |
| 5494 | |
| 5495 | /* svcxdr_tmp_alloc */ |
| 5496 | args->to_free = NULL; |
| 5497 | |
| 5498 | args->xdr = xdr; |
| 5499 | args->ops = args->iops; |
| 5500 | args->rqstp = rqstp; |
| 5501 | |
| 5502 | return nfsd4_decode_compound(args); |
| 5503 | } |
| 5504 | |
| 5505 | bool |
| 5506 | nfs4svc_encode_compoundres(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
| 5507 | { |
| 5508 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
| 5509 | __be32 *p; |
| 5510 | |
| 5511 | /* |
| 5512 | * Send buffer space for the following items is reserved |
| 5513 | * at the top of nfsd4_proc_compound(). |
| 5514 | */ |
| 5515 | p = resp->statusp; |
| 5516 | |
| 5517 | *p++ = resp->cstate.status; |
| 5518 | |
| 5519 | rqstp->rq_next_page = xdr->page_ptr + 1; |
| 5520 | |
| 5521 | *p++ = htonl(resp->taglen); |
| 5522 | memcpy(p, resp->tag, resp->taglen); |
| 5523 | p += XDR_QUADLEN(resp->taglen); |
| 5524 | *p++ = htonl(resp->opcnt); |
| 5525 | |
| 5526 | nfsd4_sequence_done(resp); |
| 5527 | return true; |
| 5528 | } |