root/include/linux/sunrpc/xdr.h

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INCLUDED FROM

DEFINITIONS

This source file includes following definitions.
  1. xdr_buf_init
  2. xdr_encode_array
  3. xdr_encode_hyper
  4. xdr_decode_hyper
  5. xdr_decode_opaque_fixed
  6. xdr_netobj_dup
  7. xdr_adjust_iovec
  8. xdr_stream_remaining
  9. xdr_align_size
  10. xdr_stream_encode_u32
  11. xdr_stream_encode_u64
  12. xdr_stream_encode_opaque_inline
  13. xdr_stream_encode_opaque_fixed
  14. xdr_stream_encode_opaque
  15. xdr_stream_encode_uint32_array
  16. xdr_stream_decode_u32
  17. xdr_stream_decode_opaque_fixed
  18. xdr_stream_decode_opaque_inline
  19. xdr_stream_decode_uint32_array
   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * XDR standard data types and function declarations
   4  *
   5  * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
   6  *
   7  * Based on:
   8  *   RFC 4506 "XDR: External Data Representation Standard", May 2006
   9  */
  10 
  11 #ifndef _SUNRPC_XDR_H_
  12 #define _SUNRPC_XDR_H_
  13 
  14 #ifdef __KERNEL__
  15 
  16 #include <linux/uio.h>
  17 #include <asm/byteorder.h>
  18 #include <asm/unaligned.h>
  19 #include <linux/scatterlist.h>
  20 
  21 struct bio_vec;
  22 struct rpc_rqst;
  23 
  24 /*
  25  * Buffer adjustment
  26  */
  27 #define XDR_QUADLEN(l)          (((l) + 3) >> 2)
  28 
  29 /*
  30  * Generic opaque `network object.' At the kernel level, this type
  31  * is used only by lockd.
  32  */
  33 #define XDR_MAX_NETOBJ          1024
  34 struct xdr_netobj {
  35         unsigned int            len;
  36         u8 *                    data;
  37 };
  38 
  39 /*
  40  * Basic structure for transmission/reception of a client XDR message.
  41  * Features a header (for a linear buffer containing RPC headers
  42  * and the data payload for short messages), and then an array of
  43  * pages.
  44  * The tail iovec allows you to append data after the page array. Its
  45  * main interest is for appending padding to the pages in order to
  46  * satisfy the int_32-alignment requirements in RFC1832.
  47  *
  48  * For the future, we might want to string several of these together
  49  * in a list if anybody wants to make use of NFSv4 COMPOUND
  50  * operations and/or has a need for scatter/gather involving pages.
  51  */
  52 struct xdr_buf {
  53         struct kvec     head[1],        /* RPC header + non-page data */
  54                         tail[1];        /* Appended after page data */
  55 
  56         struct bio_vec  *bvec;
  57         struct page **  pages;          /* Array of pages */
  58         unsigned int    page_base,      /* Start of page data */
  59                         page_len,       /* Length of page data */
  60                         flags;          /* Flags for data disposition */
  61 #define XDRBUF_READ             0x01            /* target of file read */
  62 #define XDRBUF_WRITE            0x02            /* source of file write */
  63 #define XDRBUF_SPARSE_PAGES     0x04            /* Page array is sparse */
  64 
  65         unsigned int    buflen,         /* Total length of storage buffer */
  66                         len;            /* Length of XDR encoded message */
  67 };
  68 
  69 static inline void
  70 xdr_buf_init(struct xdr_buf *buf, void *start, size_t len)
  71 {
  72         buf->head[0].iov_base = start;
  73         buf->head[0].iov_len = len;
  74         buf->tail[0].iov_len = 0;
  75         buf->pages = NULL;
  76         buf->page_len = 0;
  77         buf->flags = 0;
  78         buf->len = 0;
  79         buf->buflen = len;
  80 }
  81 
  82 /*
  83  * pre-xdr'ed macros.
  84  */
  85 
  86 #define xdr_zero        cpu_to_be32(0)
  87 #define xdr_one         cpu_to_be32(1)
  88 #define xdr_two         cpu_to_be32(2)
  89 
  90 #define rpc_auth_null   cpu_to_be32(RPC_AUTH_NULL)
  91 #define rpc_auth_unix   cpu_to_be32(RPC_AUTH_UNIX)
  92 #define rpc_auth_short  cpu_to_be32(RPC_AUTH_SHORT)
  93 #define rpc_auth_gss    cpu_to_be32(RPC_AUTH_GSS)
  94 
  95 #define rpc_call        cpu_to_be32(RPC_CALL)
  96 #define rpc_reply       cpu_to_be32(RPC_REPLY)
  97 
  98 #define rpc_msg_accepted        cpu_to_be32(RPC_MSG_ACCEPTED)
  99 
 100 #define rpc_success             cpu_to_be32(RPC_SUCCESS)
 101 #define rpc_prog_unavail        cpu_to_be32(RPC_PROG_UNAVAIL)
 102 #define rpc_prog_mismatch       cpu_to_be32(RPC_PROG_MISMATCH)
 103 #define rpc_proc_unavail        cpu_to_be32(RPC_PROC_UNAVAIL)
 104 #define rpc_garbage_args        cpu_to_be32(RPC_GARBAGE_ARGS)
 105 #define rpc_system_err          cpu_to_be32(RPC_SYSTEM_ERR)
 106 #define rpc_drop_reply          cpu_to_be32(RPC_DROP_REPLY)
 107 
 108 #define rpc_mismatch            cpu_to_be32(RPC_MISMATCH)
 109 #define rpc_auth_error          cpu_to_be32(RPC_AUTH_ERROR)
 110 
 111 #define rpc_auth_ok             cpu_to_be32(RPC_AUTH_OK)
 112 #define rpc_autherr_badcred     cpu_to_be32(RPC_AUTH_BADCRED)
 113 #define rpc_autherr_rejectedcred cpu_to_be32(RPC_AUTH_REJECTEDCRED)
 114 #define rpc_autherr_badverf     cpu_to_be32(RPC_AUTH_BADVERF)
 115 #define rpc_autherr_rejectedverf cpu_to_be32(RPC_AUTH_REJECTEDVERF)
 116 #define rpc_autherr_tooweak     cpu_to_be32(RPC_AUTH_TOOWEAK)
 117 #define rpcsec_gsserr_credproblem       cpu_to_be32(RPCSEC_GSS_CREDPROBLEM)
 118 #define rpcsec_gsserr_ctxproblem        cpu_to_be32(RPCSEC_GSS_CTXPROBLEM)
 119 
 120 /*
 121  * Miscellaneous XDR helper functions
 122  */
 123 __be32 *xdr_encode_opaque_fixed(__be32 *p, const void *ptr, unsigned int len);
 124 __be32 *xdr_encode_opaque(__be32 *p, const void *ptr, unsigned int len);
 125 __be32 *xdr_encode_string(__be32 *p, const char *s);
 126 __be32 *xdr_decode_string_inplace(__be32 *p, char **sp, unsigned int *lenp,
 127                         unsigned int maxlen);
 128 __be32 *xdr_encode_netobj(__be32 *p, const struct xdr_netobj *);
 129 __be32 *xdr_decode_netobj(__be32 *p, struct xdr_netobj *);
 130 
 131 void    xdr_inline_pages(struct xdr_buf *, unsigned int,
 132                          struct page **, unsigned int, unsigned int);
 133 void    xdr_terminate_string(struct xdr_buf *, const u32);
 134 size_t  xdr_buf_pagecount(struct xdr_buf *buf);
 135 int     xdr_alloc_bvec(struct xdr_buf *buf, gfp_t gfp);
 136 void    xdr_free_bvec(struct xdr_buf *buf);
 137 
 138 static inline __be32 *xdr_encode_array(__be32 *p, const void *s, unsigned int len)
 139 {
 140         return xdr_encode_opaque(p, s, len);
 141 }
 142 
 143 /*
 144  * Decode 64bit quantities (NFSv3 support)
 145  */
 146 static inline __be32 *
 147 xdr_encode_hyper(__be32 *p, __u64 val)
 148 {
 149         put_unaligned_be64(val, p);
 150         return p + 2;
 151 }
 152 
 153 static inline __be32 *
 154 xdr_decode_hyper(__be32 *p, __u64 *valp)
 155 {
 156         *valp = get_unaligned_be64(p);
 157         return p + 2;
 158 }
 159 
 160 static inline __be32 *
 161 xdr_decode_opaque_fixed(__be32 *p, void *ptr, unsigned int len)
 162 {
 163         memcpy(ptr, p, len);
 164         return p + XDR_QUADLEN(len);
 165 }
 166 
 167 static inline void xdr_netobj_dup(struct xdr_netobj *dst,
 168                                   struct xdr_netobj *src, gfp_t gfp_mask)
 169 {
 170         dst->data = kmemdup(src->data, src->len, gfp_mask);
 171         dst->len = src->len;
 172 }
 173 
 174 /*
 175  * Adjust kvec to reflect end of xdr'ed data (RPC client XDR)
 176  */
 177 static inline int
 178 xdr_adjust_iovec(struct kvec *iov, __be32 *p)
 179 {
 180         return iov->iov_len = ((u8 *) p - (u8 *) iov->iov_base);
 181 }
 182 
 183 /*
 184  * XDR buffer helper functions
 185  */
 186 extern void xdr_shift_buf(struct xdr_buf *, size_t);
 187 extern void xdr_buf_from_iov(struct kvec *, struct xdr_buf *);
 188 extern int xdr_buf_subsegment(struct xdr_buf *, struct xdr_buf *, unsigned int, unsigned int);
 189 extern void xdr_buf_trim(struct xdr_buf *, unsigned int);
 190 extern int xdr_buf_read_mic(struct xdr_buf *, struct xdr_netobj *, unsigned int);
 191 extern int read_bytes_from_xdr_buf(struct xdr_buf *, unsigned int, void *, unsigned int);
 192 extern int write_bytes_to_xdr_buf(struct xdr_buf *, unsigned int, void *, unsigned int);
 193 
 194 /*
 195  * Helper structure for copying from an sk_buff.
 196  */
 197 struct xdr_skb_reader {
 198         struct sk_buff  *skb;
 199         unsigned int    offset;
 200         size_t          count;
 201         __wsum          csum;
 202 };
 203 
 204 typedef size_t (*xdr_skb_read_actor)(struct xdr_skb_reader *desc, void *to, size_t len);
 205 
 206 extern int csum_partial_copy_to_xdr(struct xdr_buf *, struct sk_buff *);
 207 
 208 extern int xdr_encode_word(struct xdr_buf *, unsigned int, u32);
 209 extern int xdr_decode_word(struct xdr_buf *, unsigned int, u32 *);
 210 
 211 struct xdr_array2_desc;
 212 typedef int (*xdr_xcode_elem_t)(struct xdr_array2_desc *desc, void *elem);
 213 struct xdr_array2_desc {
 214         unsigned int elem_size;
 215         unsigned int array_len;
 216         unsigned int array_maxlen;
 217         xdr_xcode_elem_t xcode;
 218 };
 219 
 220 extern int xdr_decode_array2(struct xdr_buf *buf, unsigned int base,
 221                              struct xdr_array2_desc *desc);
 222 extern int xdr_encode_array2(struct xdr_buf *buf, unsigned int base,
 223                              struct xdr_array2_desc *desc);
 224 extern void _copy_from_pages(char *p, struct page **pages, size_t pgbase,
 225                              size_t len);
 226 
 227 /*
 228  * Provide some simple tools for XDR buffer overflow-checking etc.
 229  */
 230 struct xdr_stream {
 231         __be32 *p;              /* start of available buffer */
 232         struct xdr_buf *buf;    /* XDR buffer to read/write */
 233 
 234         __be32 *end;            /* end of available buffer space */
 235         struct kvec *iov;       /* pointer to the current kvec */
 236         struct kvec scratch;    /* Scratch buffer */
 237         struct page **page_ptr; /* pointer to the current page */
 238         unsigned int nwords;    /* Remaining decode buffer length */
 239 
 240         struct rpc_rqst *rqst;  /* For debugging */
 241 };
 242 
 243 /*
 244  * These are the xdr_stream style generic XDR encode and decode functions.
 245  */
 246 typedef void    (*kxdreproc_t)(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
 247                 const void *obj);
 248 typedef int     (*kxdrdproc_t)(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
 249                 void *obj);
 250 
 251 extern void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf,
 252                             __be32 *p, struct rpc_rqst *rqst);
 253 extern __be32 *xdr_reserve_space(struct xdr_stream *xdr, size_t nbytes);
 254 extern void xdr_commit_encode(struct xdr_stream *xdr);
 255 extern void xdr_truncate_encode(struct xdr_stream *xdr, size_t len);
 256 extern int xdr_restrict_buflen(struct xdr_stream *xdr, int newbuflen);
 257 extern void xdr_write_pages(struct xdr_stream *xdr, struct page **pages,
 258                 unsigned int base, unsigned int len);
 259 extern unsigned int xdr_stream_pos(const struct xdr_stream *xdr);
 260 extern void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf,
 261                             __be32 *p, struct rpc_rqst *rqst);
 262 extern void xdr_init_decode_pages(struct xdr_stream *xdr, struct xdr_buf *buf,
 263                 struct page **pages, unsigned int len);
 264 extern void xdr_set_scratch_buffer(struct xdr_stream *xdr, void *buf, size_t buflen);
 265 extern __be32 *xdr_inline_decode(struct xdr_stream *xdr, size_t nbytes);
 266 extern unsigned int xdr_read_pages(struct xdr_stream *xdr, unsigned int len);
 267 extern void xdr_enter_page(struct xdr_stream *xdr, unsigned int len);
 268 extern int xdr_process_buf(struct xdr_buf *buf, unsigned int offset, unsigned int len, int (*actor)(struct scatterlist *, void *), void *data);
 269 
 270 /**
 271  * xdr_stream_remaining - Return the number of bytes remaining in the stream
 272  * @xdr: pointer to struct xdr_stream
 273  *
 274  * Return value:
 275  *   Number of bytes remaining in @xdr before xdr->end
 276  */
 277 static inline size_t
 278 xdr_stream_remaining(const struct xdr_stream *xdr)
 279 {
 280         return xdr->nwords << 2;
 281 }
 282 
 283 ssize_t xdr_stream_decode_opaque(struct xdr_stream *xdr, void *ptr,
 284                 size_t size);
 285 ssize_t xdr_stream_decode_opaque_dup(struct xdr_stream *xdr, void **ptr,
 286                 size_t maxlen, gfp_t gfp_flags);
 287 ssize_t xdr_stream_decode_string(struct xdr_stream *xdr, char *str,
 288                 size_t size);
 289 ssize_t xdr_stream_decode_string_dup(struct xdr_stream *xdr, char **str,
 290                 size_t maxlen, gfp_t gfp_flags);
 291 /**
 292  * xdr_align_size - Calculate padded size of an object
 293  * @n: Size of an object being XDR encoded (in bytes)
 294  *
 295  * Return value:
 296  *   Size (in bytes) of the object including xdr padding
 297  */
 298 static inline size_t
 299 xdr_align_size(size_t n)
 300 {
 301         const size_t mask = sizeof(__u32) - 1;
 302 
 303         return (n + mask) & ~mask;
 304 }
 305 
 306 /**
 307  * xdr_stream_encode_u32 - Encode a 32-bit integer
 308  * @xdr: pointer to xdr_stream
 309  * @n: integer to encode
 310  *
 311  * Return values:
 312  *   On success, returns length in bytes of XDR buffer consumed
 313  *   %-EMSGSIZE on XDR buffer overflow
 314  */
 315 static inline ssize_t
 316 xdr_stream_encode_u32(struct xdr_stream *xdr, __u32 n)
 317 {
 318         const size_t len = sizeof(n);
 319         __be32 *p = xdr_reserve_space(xdr, len);
 320 
 321         if (unlikely(!p))
 322                 return -EMSGSIZE;
 323         *p = cpu_to_be32(n);
 324         return len;
 325 }
 326 
 327 /**
 328  * xdr_stream_encode_u64 - Encode a 64-bit integer
 329  * @xdr: pointer to xdr_stream
 330  * @n: 64-bit integer to encode
 331  *
 332  * Return values:
 333  *   On success, returns length in bytes of XDR buffer consumed
 334  *   %-EMSGSIZE on XDR buffer overflow
 335  */
 336 static inline ssize_t
 337 xdr_stream_encode_u64(struct xdr_stream *xdr, __u64 n)
 338 {
 339         const size_t len = sizeof(n);
 340         __be32 *p = xdr_reserve_space(xdr, len);
 341 
 342         if (unlikely(!p))
 343                 return -EMSGSIZE;
 344         xdr_encode_hyper(p, n);
 345         return len;
 346 }
 347 
 348 /**
 349  * xdr_stream_encode_opaque_inline - Encode opaque xdr data
 350  * @xdr: pointer to xdr_stream
 351  * @ptr: pointer to void pointer
 352  * @len: size of object
 353  *
 354  * Return values:
 355  *   On success, returns length in bytes of XDR buffer consumed
 356  *   %-EMSGSIZE on XDR buffer overflow
 357  */
 358 static inline ssize_t
 359 xdr_stream_encode_opaque_inline(struct xdr_stream *xdr, void **ptr, size_t len)
 360 {
 361         size_t count = sizeof(__u32) + xdr_align_size(len);
 362         __be32 *p = xdr_reserve_space(xdr, count);
 363 
 364         if (unlikely(!p)) {
 365                 *ptr = NULL;
 366                 return -EMSGSIZE;
 367         }
 368         xdr_encode_opaque(p, NULL, len);
 369         *ptr = ++p;
 370         return count;
 371 }
 372 
 373 /**
 374  * xdr_stream_encode_opaque_fixed - Encode fixed length opaque xdr data
 375  * @xdr: pointer to xdr_stream
 376  * @ptr: pointer to opaque data object
 377  * @len: size of object pointed to by @ptr
 378  *
 379  * Return values:
 380  *   On success, returns length in bytes of XDR buffer consumed
 381  *   %-EMSGSIZE on XDR buffer overflow
 382  */
 383 static inline ssize_t
 384 xdr_stream_encode_opaque_fixed(struct xdr_stream *xdr, const void *ptr, size_t len)
 385 {
 386         __be32 *p = xdr_reserve_space(xdr, len);
 387 
 388         if (unlikely(!p))
 389                 return -EMSGSIZE;
 390         xdr_encode_opaque_fixed(p, ptr, len);
 391         return xdr_align_size(len);
 392 }
 393 
 394 /**
 395  * xdr_stream_encode_opaque - Encode variable length opaque xdr data
 396  * @xdr: pointer to xdr_stream
 397  * @ptr: pointer to opaque data object
 398  * @len: size of object pointed to by @ptr
 399  *
 400  * Return values:
 401  *   On success, returns length in bytes of XDR buffer consumed
 402  *   %-EMSGSIZE on XDR buffer overflow
 403  */
 404 static inline ssize_t
 405 xdr_stream_encode_opaque(struct xdr_stream *xdr, const void *ptr, size_t len)
 406 {
 407         size_t count = sizeof(__u32) + xdr_align_size(len);
 408         __be32 *p = xdr_reserve_space(xdr, count);
 409 
 410         if (unlikely(!p))
 411                 return -EMSGSIZE;
 412         xdr_encode_opaque(p, ptr, len);
 413         return count;
 414 }
 415 
 416 /**
 417  * xdr_stream_encode_uint32_array - Encode variable length array of integers
 418  * @xdr: pointer to xdr_stream
 419  * @array: array of integers
 420  * @array_size: number of elements in @array
 421  *
 422  * Return values:
 423  *   On success, returns length in bytes of XDR buffer consumed
 424  *   %-EMSGSIZE on XDR buffer overflow
 425  */
 426 static inline ssize_t
 427 xdr_stream_encode_uint32_array(struct xdr_stream *xdr,
 428                 const __u32 *array, size_t array_size)
 429 {
 430         ssize_t ret = (array_size+1) * sizeof(__u32);
 431         __be32 *p = xdr_reserve_space(xdr, ret);
 432 
 433         if (unlikely(!p))
 434                 return -EMSGSIZE;
 435         *p++ = cpu_to_be32(array_size);
 436         for (; array_size > 0; p++, array++, array_size--)
 437                 *p = cpu_to_be32p(array);
 438         return ret;
 439 }
 440 
 441 /**
 442  * xdr_stream_decode_u32 - Decode a 32-bit integer
 443  * @xdr: pointer to xdr_stream
 444  * @ptr: location to store integer
 445  *
 446  * Return values:
 447  *   %0 on success
 448  *   %-EBADMSG on XDR buffer overflow
 449  */
 450 static inline ssize_t
 451 xdr_stream_decode_u32(struct xdr_stream *xdr, __u32 *ptr)
 452 {
 453         const size_t count = sizeof(*ptr);
 454         __be32 *p = xdr_inline_decode(xdr, count);
 455 
 456         if (unlikely(!p))
 457                 return -EBADMSG;
 458         *ptr = be32_to_cpup(p);
 459         return 0;
 460 }
 461 
 462 /**
 463  * xdr_stream_decode_opaque_fixed - Decode fixed length opaque xdr data
 464  * @xdr: pointer to xdr_stream
 465  * @ptr: location to store data
 466  * @len: size of buffer pointed to by @ptr
 467  *
 468  * Return values:
 469  *   On success, returns size of object stored in @ptr
 470  *   %-EBADMSG on XDR buffer overflow
 471  */
 472 static inline ssize_t
 473 xdr_stream_decode_opaque_fixed(struct xdr_stream *xdr, void *ptr, size_t len)
 474 {
 475         __be32 *p = xdr_inline_decode(xdr, len);
 476 
 477         if (unlikely(!p))
 478                 return -EBADMSG;
 479         xdr_decode_opaque_fixed(p, ptr, len);
 480         return len;
 481 }
 482 
 483 /**
 484  * xdr_stream_decode_opaque_inline - Decode variable length opaque xdr data
 485  * @xdr: pointer to xdr_stream
 486  * @ptr: location to store pointer to opaque data
 487  * @maxlen: maximum acceptable object size
 488  *
 489  * Note: the pointer stored in @ptr cannot be assumed valid after the XDR
 490  * buffer has been destroyed, or even after calling xdr_inline_decode()
 491  * on @xdr. It is therefore expected that the object it points to should
 492  * be processed immediately.
 493  *
 494  * Return values:
 495  *   On success, returns size of object stored in *@ptr
 496  *   %-EBADMSG on XDR buffer overflow
 497  *   %-EMSGSIZE if the size of the object would exceed @maxlen
 498  */
 499 static inline ssize_t
 500 xdr_stream_decode_opaque_inline(struct xdr_stream *xdr, void **ptr, size_t maxlen)
 501 {
 502         __be32 *p;
 503         __u32 len;
 504 
 505         *ptr = NULL;
 506         if (unlikely(xdr_stream_decode_u32(xdr, &len) < 0))
 507                 return -EBADMSG;
 508         if (len != 0) {
 509                 p = xdr_inline_decode(xdr, len);
 510                 if (unlikely(!p))
 511                         return -EBADMSG;
 512                 if (unlikely(len > maxlen))
 513                         return -EMSGSIZE;
 514                 *ptr = p;
 515         }
 516         return len;
 517 }
 518 
 519 /**
 520  * xdr_stream_decode_uint32_array - Decode variable length array of integers
 521  * @xdr: pointer to xdr_stream
 522  * @array: location to store the integer array or NULL
 523  * @array_size: number of elements to store
 524  *
 525  * Return values:
 526  *   On success, returns number of elements stored in @array
 527  *   %-EBADMSG on XDR buffer overflow
 528  *   %-EMSGSIZE if the size of the array exceeds @array_size
 529  */
 530 static inline ssize_t
 531 xdr_stream_decode_uint32_array(struct xdr_stream *xdr,
 532                 __u32 *array, size_t array_size)
 533 {
 534         __be32 *p;
 535         __u32 len;
 536         ssize_t retval;
 537 
 538         if (unlikely(xdr_stream_decode_u32(xdr, &len) < 0))
 539                 return -EBADMSG;
 540         p = xdr_inline_decode(xdr, len * sizeof(*p));
 541         if (unlikely(!p))
 542                 return -EBADMSG;
 543         if (array == NULL)
 544                 return len;
 545         if (len <= array_size) {
 546                 if (len < array_size)
 547                         memset(array+len, 0, (array_size-len)*sizeof(*array));
 548                 array_size = len;
 549                 retval = len;
 550         } else
 551                 retval = -EMSGSIZE;
 552         for (; array_size > 0; p++, array++, array_size--)
 553                 *array = be32_to_cpup(p);
 554         return retval;
 555 }
 556 #endif /* __KERNEL__ */
 557 
 558 #endif /* _SUNRPC_XDR_H_ */
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