bsd/nfs/nfsm_subs.h

   1 /*
   2  * Copyright (c) 2000-2011 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  29 /*
  30  * Copyright (c) 1989, 1993
  31  *      The Regents of the University of California.  All rights reserved.
  32  *
  33  * This code is derived from software contributed to Berkeley by
  34  * Rick Macklem at The University of Guelph.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  * 3. All advertising materials mentioning features or use of this software
  45  *    must display the following acknowledgement:
  46  *      This product includes software developed by the University of
  47  *      California, Berkeley and its contributors.
  48  * 4. Neither the name of the University nor the names of its contributors
  49  *    may be used to endorse or promote products derived from this software
  50  *    without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  62  * SUCH DAMAGE.
  63  *
  64  *      @(#)nfsm_subs.h 8.2 (Berkeley) 3/30/95
  65  * FreeBSD-Id: nfsm_subs.h,v 1.13 1997/07/16 09:06:30 dfr Exp $
  66  */
  67
  68
  69 #ifndef _NFS_NFSM_SUBS_H_
  70 #define _NFS_NFSM_SUBS_H_
  71
  72 #include <sys/appleapiopts.h>
  73
  74 #ifdef __APPLE_API_PRIVATE
  75
  76 int nfsm_rpchead(struct nfsreq *, mbuf_t, u_int64_t *, mbuf_t *);
  77 int nfsm_rpchead2(struct nfsmount *, int, int, int, int, int, kauth_cred_t, struct nfsreq *, mbuf_t, u_int64_t *, mbuf_t *);
  78
  79 int nfsm_chain_new_mbuf(struct nfsm_chain *, size_t);
  80 int nfsm_chain_add_opaque_f(struct nfsm_chain *, const u_char *, uint32_t);
  81 int nfsm_chain_add_opaque_nopad_f(struct nfsm_chain *, const u_char *, uint32_t);
  82 int nfsm_chain_add_uio(struct nfsm_chain *, uio_t, uint32_t);
  83 int nfsm_chain_add_fattr4_f(struct nfsm_chain *, struct vnode_attr *, struct nfsmount *);
  84 int nfsm_chain_add_v2sattr_f(struct nfsm_chain *, struct vnode_attr *, uint32_t);
  85 int nfsm_chain_add_v3sattr_f(struct nfsm_chain *, struct vnode_attr *);
  86 int nfsm_chain_add_string_nfc(struct nfsm_chain *, const uint8_t *, uint32_t);
  87
  88 int nfsm_chain_advance(struct nfsm_chain *, uint32_t);
  89 int nfsm_chain_offset(struct nfsm_chain *);
  90 int nfsm_chain_reverse(struct nfsm_chain *, uint32_t);
  91 int nfsm_chain_get_opaque_pointer_f(struct nfsm_chain *, uint32_t, u_char **);
  92 int nfsm_chain_get_opaque_f(struct nfsm_chain *, uint32_t, u_char *);
  93 int nfsm_chain_get_uio(struct nfsm_chain *, uint32_t, uio_t);
  94 int nfsm_chain_get_fh_attr(struct nfsm_chain *, nfsnode_t,
  95         vfs_context_t, int, uint64_t *, fhandle_t *, struct nfs_vattr *);
  96 int nfsm_chain_get_wcc_data_f(struct nfsm_chain *, nfsnode_t, struct timespec *, int *, u_int64_t *);
  97 int nfsm_chain_get_secinfo(struct nfsm_chain *, uint32_t *, int *);
  98
  99 #if NFSSERVER
 100 void nfsm_adj(mbuf_t, int, int);
 101 int nfsm_mbuf_get_list(size_t, mbuf_t *, int *);
 102
 103 int nfsm_chain_add_fattr(struct nfsrv_descript *, struct nfsm_chain *, struct vnode_attr *);
 104 int nfsm_chain_add_wcc_data_f(struct nfsrv_descript *, struct nfsm_chain *, int,
 105         struct vnode_attr *, int, struct vnode_attr *);
 106 int nfsm_chain_get_path_namei(struct nfsm_chain *, uint32_t, struct nameidata *);
 107 int nfsm_chain_get_sattr(struct nfsrv_descript *, struct nfsm_chain *, struct vnode_attr *);
 108 int nfsm_chain_trim_data(struct nfsm_chain *, int, int *);
 109 #endif /* NFSSERVER */
 110
 111 /* check name length */
 112 #define nfsm_name_len_check(E, ND, LEN) \
 113         do { \
 114                 if (E) break; \
 115                 if (((ND)->nd_vers == NFS_VER2) && ((LEN) > NFS_MAXNAMLEN)) \
 116                         (E) = NFSERR_NAMETOL; \
 117                 if ((LEN) <= 0) \
 118                         error = EBADRPC; \
 119         } while (0)
 120
 121 #define nfsm_assert(E, COND, ERR) \
 122         do { \
 123                 if (E) break; \
 124                 if (!(COND)) \
 125                         (E) = (ERR); \
 126         } while (0)
 127
 128 /* Initialize a vnode_attr to retrieve attributes for the NFS server. */
 129 #define nfsm_srv_vattr_init(VAP, VERS) \
 130         do { \
 131                 VATTR_INIT(VAP); \
 132                 VATTR_WANTED((VAP), va_type); \
 133                 VATTR_WANTED((VAP), va_mode); \
 134                 VATTR_WANTED((VAP), va_nlink); \
 135                 VATTR_WANTED((VAP), va_uid); \
 136                 VATTR_WANTED((VAP), va_gid); \
 137                 VATTR_WANTED((VAP), va_data_size); \
 138                 VATTR_WANTED((VAP), va_data_alloc); \
 139                 VATTR_WANTED((VAP), va_rdev); \
 140                 VATTR_WANTED((VAP), va_fsid); \
 141                 VATTR_WANTED((VAP), va_fileid); \
 142                 VATTR_WANTED((VAP), va_access_time); \
 143                 VATTR_WANTED((VAP), va_modify_time); \
 144                 VATTR_WANTED((VAP), va_change_time); \
 145                 if ((VERS) == NFS_VER2) \
 146                         VATTR_WANTED((VAP), va_iosize); \
 147         } while (0)
 148
 149 /* Initialize a vnode_attr to retrieve pre-operation attributes for the NFS server. */
 150 #define nfsm_srv_pre_vattr_init(VAP) \
 151         do { \
 152                 VATTR_INIT(VAP); \
 153                 VATTR_WANTED((VAP), va_data_size); \
 154                 VATTR_WANTED((VAP), va_modify_time); \
 155                 VATTR_WANTED((VAP), va_change_time); \
 156         } while (0)
 157
 158 /* round up to a multiple of 4 */
 159 #define nfsm_rndup(a)   (((a)+3)&(~0x3))
 160
 161 #define nfsm_pad(a)     (nfsm_rndup(a) - (a))
 162
 163 /*
 164  * control flow macros:
 165  * go to the appropriate label on condition
 166  */
 167 #define nfsmout_if(E)   do { if (E) goto nfsmout; } while (0)
 168 #define nfsmerr_if(E)   do { if (E) goto nfsmerr; } while (0)
 169
 170 /*
 171  * For NFS v2 errors and EBADRPC, the reply contains only the error.
 172  * This macro is used to skip any reply building code and go straight
 173  * to nfsmout instead.
 174  */
 175 #define nfsmout_on_status(ND, E) \
 176         do { \
 177                 if (((ND)->nd_repstat == EBADRPC) || \
 178                     ((ND)->nd_repstat && ((ND)->nd_vers == NFS_VER2))) { \
 179                         (E) = 0; \
 180                         goto nfsmout; \
 181                 } \
 182         } while (0)
 183
 184 /* initialize an mbuf chain */
 185 #define nfsm_chain_null(NMC) \
 186         do { \
 187                 (NMC)->nmc_mhead = (NMC)->nmc_mcur = NULL; \
 188                 (NMC)->nmc_ptr = NULL; \
 189         } while (0)
 190
 191 /* cleanup an mbuf chain */
 192 #define nfsm_chain_cleanup(NMC) \
 193         do { \
 194                 if (!(NMC)->nmc_mhead) break; \
 195                 mbuf_freem((NMC)->nmc_mhead); \
 196                 nfsm_chain_null(NMC); \
 197         } while (0)
 198
 199 /* get an mbuf given a size hint */
 200 #define nfsm_mbuf_get(E, MBP, SIZEHINT) \
 201         do { \
 202                 *(MBP) = NULL; \
 203                 if ((size_t)(SIZEHINT) >= nfs_mbuf_minclsize) \
 204                         (E) = mbuf_mclget(MBUF_WAITOK, MBUF_TYPE_DATA, (MBP)); \
 205                 else \
 206                         (E) = mbuf_get(MBUF_WAITOK, MBUF_TYPE_DATA, (MBP)); \
 207         } while (0)
 208
 209
 210 /*
 211  * macros for building NFS mbuf chains
 212  */
 213
 214 /* prepare an mbuf chain for building starting with the given mbuf */
 215 #define nfsm_chain_init(NMC, MB) \
 216         do { \
 217                 (NMC)->nmc_mhead = (MB); \
 218                 (NMC)->nmc_mcur = (NMC)->nmc_mhead; \
 219                 (NMC)->nmc_ptr = mbuf_data((NMC)->nmc_mcur); \
 220                 (NMC)->nmc_left = mbuf_trailingspace((NMC)->nmc_mcur); \
 221                 (NMC)->nmc_flags = 0; \
 222         } while (0)
 223
 224 /* prepare an mbuf chain for building starting with a newly allocated mbuf */
 225 #define nfsm_chain_build_alloc_init(E, NMC, SIZEHINT) \
 226         do { \
 227                 mbuf_t ncbimb; \
 228                 nfsm_mbuf_get((E), &ncbimb, (SIZEHINT)); \
 229                 if (E) break; \
 230                 nfsm_chain_init((NMC), ncbimb); \
 231         } while (0)
 232
 233 /* done building an mbuf chain */
 234 #define nfsm_chain_build_done(E, NMC) \
 235         do { \
 236                 if ((E) || !(NMC)->nmc_mcur) break; \
 237                 /* cap off current mbuf */ \
 238                 mbuf_setlen((NMC)->nmc_mcur, \
 239                         (NMC)->nmc_ptr - (caddr_t)mbuf_data((NMC)->nmc_mcur)); \
 240         } while (0)
 241
 242 /*
 243  *  set the TCP record mark at the head of an mbuf chain -
 244  *  assumes 4 bytes are already allocated in the head mbuf
 245  */
 246 #define nfsm_chain_set_recmark(E, NMC, VAL) \
 247         do { \
 248                 if (E) break; \
 249                 *((uint32_t*)mbuf_data((NMC)->nmc_mhead)) \
 250                         = txdr_unsigned(VAL); \
 251         } while (0)
 252
 253 /* make sure there's room for size bytes in current mbuf */
 254 #define nfsm_chain_check_size(E, NMC, SIZE) \
 255         do { \
 256                 if (E) break; \
 257                 if ((NMC)->nmc_left < (SIZE)) { \
 258                         (E) = nfsm_chain_new_mbuf((NMC), (SIZE)); \
 259                         if (!(E) && ((NMC)->nmc_left < (SIZE))) \
 260                                 (E) = ENOMEM; \
 261                 } \
 262         } while (0)
 263
 264 /* add a 32bit value to an mbuf chain extending if necessary */
 265 #define nfsm_chain_add_32(E, NMC, VAL) \
 266         do { \
 267                 nfsm_chain_check_size((E), (NMC), NFSX_UNSIGNED); \
 268                 if (E) break; \
 269                 *((uint32_t*)(NMC)->nmc_ptr) = txdr_unsigned(VAL); \
 270                 (NMC)->nmc_ptr += NFSX_UNSIGNED; \
 271                 (NMC)->nmc_left -= NFSX_UNSIGNED; \
 272         } while (0)
 273
 274 /* add a 64bit value to an mbuf chain */
 275 #define nfsm_chain_add_64(E, NMC, VAL) \
 276         do { \
 277                 uint64_t __tmp64; \
 278                 nfsm_chain_check_size((E), (NMC), 2 * NFSX_UNSIGNED); \
 279                 if (E) break; \
 280                 __tmp64 = (VAL); \
 281                 txdr_hyper(&__tmp64, (NMC)->nmc_ptr); \
 282                 (NMC)->nmc_ptr += 2 * NFSX_UNSIGNED; \
 283                 (NMC)->nmc_left -= 2 * NFSX_UNSIGNED; \
 284         } while (0)
 285
 286 /* zero the last 4 bytes for a range of opaque */
 287 /* data to make sure any pad bytes will be zero. */
 288 #define nfsm_chain_zero_opaque_pad(BUF, LEN) \
 289         *(((uint32_t*)(BUF))+((nfsm_rndup(LEN)>>2)-1)) = 0
 290
 291 /* add buffer of opaque data to an mbuf chain */
 292 #define nfsm_chain_add_opaque(E, NMC, BUF, LEN) \
 293         do { \
 294                 uint32_t rndlen = nfsm_rndup(LEN); \
 295                 if (E) break; \
 296                 if ((NMC)->nmc_left < rndlen) { \
 297                         (E) = nfsm_chain_add_opaque_f((NMC), (const u_char*)(BUF), (LEN)); \
 298                         break; \
 299                 } \
 300                 nfsm_chain_zero_opaque_pad((NMC)->nmc_ptr, (LEN)); \
 301                 bcopy((BUF), (NMC)->nmc_ptr, (LEN)); \
 302                 (NMC)->nmc_ptr += rndlen; \
 303                 (NMC)->nmc_left -= rndlen; \
 304         } while (0)
 305
 306 /* add buffer of opaque data to an mbuf chain without padding */
 307 #define nfsm_chain_add_opaque_nopad(E, NMC, BUF, LEN) \
 308         do { \
 309                 if (E) break; \
 310                 if ((NMC)->nmc_left < (uint32_t) (LEN)) { \
 311                         (E) = nfsm_chain_add_opaque_nopad_f((NMC), (const u_char*)(BUF), (LEN)); \
 312                         break; \
 313                 } \
 314                 bcopy((BUF), (NMC)->nmc_ptr, (LEN)); \
 315                 (NMC)->nmc_ptr += (LEN); \
 316                 (NMC)->nmc_left -= (LEN); \
 317         } while (0)
 318
 319 /* finish an mbuf in a chain to allow subsequent insertion */
 320 #define nfsm_chain_finish_mbuf(E, NMC) \
 321         do { \
 322                 if (E) break; \
 323                 mbuf_setlen((NMC)->nmc_mcur, \
 324                         (NMC)->nmc_ptr - (caddr_t)mbuf_data((NMC)->nmc_mcur)); \
 325                 (NMC)->nmc_left = 0; \
 326         } while (0)
 327
 328 /* add a file handle to an mbuf chain */
 329 #define nfsm_chain_add_fh(E, NMC, VERS, FHP, FHLEN) \
 330         do { \
 331                 if (E) break; \
 332                 if ((VERS) != NFS_VER2) \
 333                         nfsm_chain_add_32((E), (NMC), (FHLEN)); \
 334                 nfsm_chain_add_opaque((E), (NMC), (FHP), (FHLEN)); \
 335         } while (0)
 336
 337 /* add a string to an mbuf chain */
 338 #define nfsm_chain_add_string(E, NMC, STR, LEN) \
 339         do { \
 340                 nfsm_chain_add_32((E), (NMC), (LEN)); \
 341                 nfsm_chain_add_opaque((E), (NMC), (STR), (LEN)); \
 342         } while (0)
 343
 344 /* add a name to an mbuf chain */
 345 #define nfsm_chain_add_name(E, NMC, STR, LEN, NMP) \
 346         do { \
 347                 if (E) break; \
 348                 if (NMFLAG((NMP), NFC)) \
 349                         (E) = nfsm_chain_add_string_nfc((NMC), (const uint8_t*)(STR), (LEN)); \
 350                 else \
 351                         nfsm_chain_add_string((E), (NMC), (STR), (LEN)); \
 352         } while (0)
 353
 354 /* add an NFSv2 time to an mbuf chain */
 355 #define nfsm_chain_add_v2time(E, NMC, TVP) \
 356         do { \
 357                 if (TVP) { \
 358                         nfsm_chain_add_32((E), (NMC), (TVP)->tv_sec); \
 359                         nfsm_chain_add_32((E), (NMC), ((TVP)->tv_nsec != -1) ? \
 360                                 ((uint32_t)(TVP)->tv_nsec / 1000) : 0xffffffff); \
 361                 } else { \
 362                         /* no time... use -1 */ \
 363                         nfsm_chain_add_32((E), (NMC), -1); \
 364                         nfsm_chain_add_32((E), (NMC), -1); \
 365                 } \
 366         } while (0)
 367
 368 /* add an NFSv3 time to an mbuf chain */
 369 #define nfsm_chain_add_v3time(E, NMC, TVP) \
 370         do { \
 371                 nfsm_chain_add_32((E), (NMC), (TVP)->tv_sec); \
 372                 nfsm_chain_add_32((E), (NMC), (TVP)->tv_nsec); \
 373         } while (0)
 374
 375 /* add an NFS v2 or v3 time to an mbuf chain */
 376 #define nfsm_chain_add_time(E, NMC, VERS, TVP) \
 377         do { \
 378                 if ((VERS) == NFS_VER2) { \
 379                         nfsm_chain_add_v2time((E), (NMC), (TVP)); \
 380                 } else { \
 381                         nfsm_chain_add_v3time((E), (NMC), (TVP)); \
 382                 } \
 383         } while (0)
 384
 385 /* add an NFSv3 postop file handle to an mbuf chain */
 386 #define nfsm_chain_add_postop_fh(E, NMC, FHP, FHLEN) \
 387         do { \
 388                 nfsm_chain_add_32((E), (NMC), TRUE); \
 389                 nfsm_chain_add_fh((E), (NMC), NFS_VER3, (FHP), (FHLEN)); \
 390         } while (0)
 391
 392 /* add NFSv3 postop attributes to an mbuf chain */
 393 #define nfsm_chain_add_postop_attr(E, ND, NMC, ATTRERR, VAP) \
 394         do { \
 395                 if (E) break; \
 396                 if (ATTRERR) { \
 397                         nfsm_chain_add_32((E), (NMC), FALSE); \
 398                         break; \
 399                 } \
 400                 nfsm_chain_add_32((E), (NMC), TRUE); \
 401                 if (E) break; \
 402                 (E) = nfsm_chain_add_fattr((ND), (NMC), (VAP)); \
 403         } while (0)
 404
 405 /* Add an NFSv2 "sattr" structure to an mbuf chain */
 406 #define nfsm_chain_add_v2sattr(E, NMC, VAP, SZRDEV) \
 407         do { \
 408                 if (E) break; \
 409                 (E) = nfsm_chain_add_v2sattr_f((NMC), (VAP), (SZRDEV)); \
 410         } while (0)
 411
 412 /* Add an NFSv3 "sattr" structure to an mbuf chain */
 413 #define nfsm_chain_add_v3sattr(E, NMC, VAP) \
 414         do { \
 415                 if (E) break; \
 416                 (E) = nfsm_chain_add_v3sattr_f((NMC), (VAP)); \
 417         } while (0)
 418
 419 /* Add an NFSv4 "fattr" structure to an mbuf chain */
 420 #define nfsm_chain_add_fattr4(E, NMC, VAP, NMP) \
 421         do { \
 422                 if (E) break; \
 423                 (E) = nfsm_chain_add_fattr4_f((NMC), (VAP), (NMP)); \
 424         } while (0)
 425
 426 /* add NFSv3 WCC data to an mbuf chain */
 427 #define nfsm_chain_add_wcc_data(E, ND, NMC, PREERR, PREVAP, POSTERR, POSTVAP) \
 428         do { \
 429                 if (E) break; \
 430                 (E) = nfsm_chain_add_wcc_data_f((ND), (NMC), \
 431                         (PREERR), (PREVAP), (POSTERR), (POSTVAP)); \
 432         } while (0)
 433
 434 /* add NFSv4 COMPOUND header */
 435 #define NFS4_TAG_LENGTH 12
 436 #define nfsm_chain_add_compound_header(E, NMC, TAG, NUMOPS) \
 437         do { \
 438                 if ((TAG) && strlen(TAG)) { \
 439                         /* put tags into a fixed-length space-padded field */ \
 440                         char __nfstag[NFS4_TAG_LENGTH+1]; \
 441                         snprintf(__nfstag, sizeof(__nfstag), "%-*s", NFS4_TAG_LENGTH, (TAG)); \
 442                         nfsm_chain_add_32((E), (NMC), NFS4_TAG_LENGTH); \
 443                         nfsm_chain_add_opaque((E), (NMC), __nfstag, NFS4_TAG_LENGTH); \
 444                 } else { \
 445                         nfsm_chain_add_32((E), (NMC), 0); \
 446                 } \
 447                 nfsm_chain_add_32((E), (NMC), 0); /*minorversion*/ \
 448                 nfsm_chain_add_32((E), (NMC), (NUMOPS)); \
 449         } while (0)
 450
 451 /* add NFSv4 attr bitmap */
 452 #define nfsm_chain_add_bitmap(E, NMC, B, LEN) \
 453         do { \
 454                 int __i; \
 455                 nfsm_chain_add_32((E), (NMC), (LEN)); \
 456                 for (__i=0; __i < (LEN); __i++) \
 457                         nfsm_chain_add_32((E), (NMC), (B)[__i]); \
 458         } while (0)
 459
 460 /* add NFSv4 attr bitmap masked with the given mask */
 461 #define nfsm_chain_add_bitmap_masked(E, NMC, B, LEN, MASK) \
 462         do { \
 463                 int __i; \
 464                 nfsm_chain_add_32((E), (NMC), (LEN)); \
 465                 for (__i=0; __i < (LEN); __i++) \
 466                         nfsm_chain_add_32((E), (NMC), ((B)[__i] & (MASK)[__i])); \
 467         } while (0)
 468
 469 /* add NFSv4 attr bitmap masked with the supported attributes for this mount/node */
 470 #define nfsm_chain_add_bitmap_supported(E, NMC, B, NMP, NP) \
 471         do { \
 472                 uint32_t __bitmap[NFS_ATTR_BITMAP_LEN], *__bmp = (B); \
 473                 int __nonamedattr = 0, __noacl = 0, __nomode = 0; \
 474                 if (!((NMP)->nm_fsattr.nfsa_flags & NFS_FSFLAG_NAMED_ATTR) || \
 475                     ((NP) && (((nfsnode_t)(NP))->n_flag & (NISDOTZFS|NISDOTZFSCHILD)))) \
 476                         __nonamedattr = 1; \
 477                 if (!((NMP)->nm_fsattr.nfsa_flags & NFS_FSFLAG_ACL)) \
 478                         __noacl = 1; \
 479                 if (NMFLAG((NMP), ACLONLY)) \
 480                         __nomode = 1; \
 481                 if (__nonamedattr || __noacl || __nomode) { \
 482                         /* don't ask for attrs we're not supporting */ \
 483                         /* some ".zfs" directories can't handle being asked for some attributes */ \
 484                         int __ii; \
 485                         NFS_CLEAR_ATTRIBUTES(__bitmap); \
 486                         for (__ii=0; __ii < NFS_ATTR_BITMAP_LEN; __ii++) \
 487                                 __bitmap[__ii] = (B)[__ii]; \
 488                         if (__nonamedattr) \
 489                                 NFS_BITMAP_CLR(__bitmap, NFS_FATTR_NAMED_ATTR); \
 490                         if (__noacl) \
 491                                 NFS_BITMAP_CLR(__bitmap, NFS_FATTR_ACL); \
 492                         if (__nomode) \
 493                                 NFS_BITMAP_CLR(__bitmap, NFS_FATTR_MODE); \
 494                         __bmp = __bitmap; \
 495                 } \
 496                 nfsm_chain_add_bitmap_masked((E), (NMC), __bmp, NFS_ATTR_BITMAP_LEN, (NMP)->nm_fsattr.nfsa_supp_attr); \
 497         } while (0)
 498
 499 /* Add an NFSv4 "stateid" structure to an mbuf chain */
 500 #define nfsm_chain_add_stateid(E, NMC, SID) \
 501         do { \
 502                 nfsm_chain_add_32((E), (NMC), (SID)->seqid); \
 503                 nfsm_chain_add_32((E), (NMC), (SID)->other[0]); \
 504                 nfsm_chain_add_32((E), (NMC), (SID)->other[1]); \
 505                 nfsm_chain_add_32((E), (NMC), (SID)->other[2]); \
 506         } while (0)
 507
 508 /* add an NFSv4 lock owner structure to an mbuf chain */
 509 #define nfsm_chain_add_lock_owner4(E, NMC, NMP, NLOP) \
 510         do { \
 511                 nfsm_chain_add_64((E), (NMC), (NMP)->nm_clientid); \
 512                 nfsm_chain_add_32((E), (NMC), 5*NFSX_UNSIGNED); \
 513                 nfsm_chain_add_32((E), (NMC), (NLOP)->nlo_name); \
 514                 nfsm_chain_add_32((E), (NMC), (NLOP)->nlo_pid); \
 515                 nfsm_chain_add_64((E), (NMC), (NLOP)->nlo_pid_start.tv_sec); \
 516                 nfsm_chain_add_32((E), (NMC), (NLOP)->nlo_pid_start.tv_usec); \
 517         } while (0)
 518
 519 /*
 520  * macros for dissecting NFS mbuf chains
 521  */
 522
 523 /* prepare an mbuf chain for dissection starting with the given mbuf */
 524 #define nfsm_chain_dissect_init(E, NMC, H) \
 525         do { \
 526                 if (!(H)) { \
 527                         (E) = EINVAL; \
 528                         break; \
 529                 } \
 530                 (NMC)->nmc_mcur = (NMC)->nmc_mhead = (H); \
 531                 (NMC)->nmc_ptr = mbuf_data(H); \
 532                 (NMC)->nmc_left = mbuf_len(H); \
 533         } while (0)
 534
 535 /* skip a number of bytes in an mbuf chain */
 536 #define nfsm_chain_adv(E, NMC, LEN) \
 537         do { \
 538                 if (E) break; \
 539                 if ((NMC)->nmc_left >= (uint32_t)(LEN)) { \
 540                         (NMC)->nmc_left -= (LEN); \
 541                         (NMC)->nmc_ptr += (LEN); \
 542                 } else { \
 543                         (E) = nfsm_chain_advance((NMC), (LEN)); \
 544                 } \
 545         } while (0)
 546
 547 /* get a 32bit value from an mbuf chain */
 548 #define nfsm_chain_get_32(E, NMC, LVAL) \
 549         do { \
 550                 uint32_t __tmp32, *__tmpptr; \
 551                 if (E) break; \
 552                 if ((NMC)->nmc_left >= NFSX_UNSIGNED) { \
 553                         __tmpptr = (uint32_t*)(NMC)->nmc_ptr; \
 554                         (NMC)->nmc_left -= NFSX_UNSIGNED; \
 555                         (NMC)->nmc_ptr += NFSX_UNSIGNED; \
 556                 } else { \
 557                         __tmpptr = &__tmp32; \
 558                         (E) = nfsm_chain_get_opaque_f((NMC), NFSX_UNSIGNED, (u_char*)__tmpptr); \
 559                         if (E) break; \
 560                 } \
 561                 (LVAL) = fxdr_unsigned(uint32_t, *__tmpptr); \
 562         } while (0)
 563
 564 /* get a 64bit value from an mbuf chain */
 565 #define nfsm_chain_get_64(E, NMC, LVAL) \
 566         do { \
 567                 uint64_t __tmp64, *__tmpptr; \
 568                 if (E) break; \
 569                 if ((NMC)->nmc_left >= 2 * NFSX_UNSIGNED) { \
 570                         __tmpptr = (uint64_t*)(NMC)->nmc_ptr; \
 571                         (NMC)->nmc_left -= 2 * NFSX_UNSIGNED; \
 572                         (NMC)->nmc_ptr += 2 * NFSX_UNSIGNED; \
 573                 } else { \
 574                         __tmpptr = &__tmp64; \
 575                         (E) = nfsm_chain_get_opaque_f((NMC), 2 * NFSX_UNSIGNED, (u_char*)__tmpptr); \
 576                         if (E) break; \
 577                 } \
 578                 fxdr_hyper(__tmpptr, &(LVAL)); \
 579         } while (0)
 580
 581 /* get a pointer to the next consecutive bytes in an mbuf chain */
 582 #define nfsm_chain_get_opaque_pointer(E, NMC, LEN, PTR) \
 583         do { \
 584                 uint32_t rndlen; \
 585                 if (E) break; \
 586                 rndlen = nfsm_rndup(LEN); \
 587                 if ((NMC)->nmc_left >= rndlen) { \
 588                         (PTR) = (void*)(NMC)->nmc_ptr; \
 589                         (NMC)->nmc_left -= rndlen; \
 590                         (NMC)->nmc_ptr += rndlen; \
 591                 } else { \
 592                         (E) = nfsm_chain_get_opaque_pointer_f((NMC), (LEN), (u_char**)&(PTR)); \
 593                 } \
 594         } while (0)
 595
 596 /* copy the next consecutive bytes of opaque data from an mbuf chain */
 597 #define nfsm_chain_get_opaque(E, NMC, LEN, PTR) \
 598         do { \
 599                 uint32_t rndlen; \
 600                 if (E) break; \
 601                 rndlen = nfsm_rndup(LEN); \
 602                 if ((NMC)->nmc_left >= rndlen) { \
 603                         u_char *__tmpptr = (u_char*)(NMC)->nmc_ptr; \
 604                         (NMC)->nmc_left -= rndlen; \
 605                         (NMC)->nmc_ptr += rndlen; \
 606                         bcopy(__tmpptr, (PTR), (LEN)); \
 607                 } else { \
 608                         (E) = nfsm_chain_get_opaque_f((NMC), (LEN), (u_char*)(PTR)); \
 609                 } \
 610         } while (0)
 611
 612 /* get the size of and a pointer to a file handle in an mbuf chain */
 613 #define nfsm_chain_get_fh_ptr(E, NMC, VERS, FHP, FHSIZE) \
 614         do { \
 615                 if ((VERS) != NFS_VER2) \
 616                         nfsm_chain_get_32((E), (NMC), (FHSIZE)); \
 617                 else \
 618                         (FHSIZE) = NFSX_V2FH;\
 619                 nfsm_chain_get_opaque_pointer((E), (NMC), (FHSIZE), (FHP));\
 620         } while (0)
 621
 622 /* get the size of and data for a file handle in an mbuf chain */
 623 #define nfsm_chain_get_fh(E, NMC, VERS, FHP) \
 624         do { \
 625                 if ((VERS) != NFS_VER2) \
 626                         nfsm_chain_get_32((E), (NMC), (FHP)->fh_len); \
 627                 else \
 628                         (FHP)->fh_len = NFSX_V2FH;\
 629                 nfsm_chain_get_opaque((E), (NMC), (uint32_t)(FHP)->fh_len, (FHP)->fh_data);\
 630                 if (E) \
 631                         (FHP)->fh_len = 0;\
 632         } while (0)
 633
 634 /* get an NFS v2 or v3 time from an mbuf chain */
 635 #define nfsm_chain_get_time(E, NMC, VERS, TSEC, TNSEC) \
 636         do { \
 637                 nfsm_chain_get_32((E), (NMC), (TSEC)); \
 638                 nfsm_chain_get_32((E), (NMC), (TNSEC)); \
 639                 if ((E) || ((VERS) != NFS_VER2)) break; \
 640                 if ((uint32_t)(TNSEC) == 0xffffffff) \
 641                         (TNSEC) = 0; \
 642                 else \
 643                         (TNSEC) *= 1000; \
 644         } while (0)
 645
 646 /* get postop attributes from an mbuf chain */
 647 #define nfsm_chain_postop_attr_get(E, NMC, F, VAP) \
 648         do { \
 649                 (F) = 0; \
 650                 if ((E) || !(NMC)->nmc_mhead) break; \
 651                 nfsm_chain_get_32((E), (NMC), (F)); \
 652                 if ((E) || !(F)) break; \
 653                 if (((E) = nfs_parsefattr((NMC), NFS_VER3, (VAP)))) \
 654                         (F) = 0; \
 655         } while (0)
 656
 657 /* update a node's attribute cache with postop attributes from an mbuf chain */
 658 /* (F returns whether the attributes were updated or not) */
 659 #define nfsm_chain_postop_attr_update_flag(E, NMC, NP, F, X) \
 660         do { \
 661                 struct nfs_vattr ttvattr; \
 662                 nfsm_chain_postop_attr_get((E), (NMC), (F), &ttvattr); \
 663                 if ((E) || !(F)) break; \
 664                 if (((E) = nfs_loadattrcache((NP), &ttvattr, (X), 1))) { \
 665                         (F) = 0; \
 666                         break; \
 667                 } \
 668                 if (*(X) == 0) \
 669                         (F) = 0; \
 670         } while (0)
 671
 672 /* update a node's attribute cache with postop attributes from an mbuf chain */
 673 #define nfsm_chain_postop_attr_update(E, NMC, NP, X) \
 674         do { \
 675                 int __dummy_flag = 0; \
 676                 nfsm_chain_postop_attr_update_flag((E), (NMC), (NP), __dummy_flag, (X)); \
 677         } while (0)
 678
 679 /* get and process NFSv3 WCC data from an mbuf chain */
 680 #define nfsm_chain_get_wcc_data(E, NMC, NP, PREMTIME, NEWPOSTATTR, X) \
 681         do { \
 682                 if (E) break; \
 683                 (E) = nfsm_chain_get_wcc_data_f((NMC), (NP), (PREMTIME), (NEWPOSTATTR), (X)); \
 684         } while (0)
 685
 686 /* update a node's attribute cache with attributes from an mbuf chain */
 687 #define nfsm_chain_loadattr(E, NMC, NP, VERS, X) \
 688         do { \
 689                 struct nfs_vattr ttvattr; \
 690                 if (E) break; \
 691                 if ((VERS) == NFS_VER4) { \
 692                         (E) = nfs4_parsefattr((NMC), NULL, &ttvattr, NULL, NULL, NULL); \
 693                 } else { \
 694                         (E) = nfs_parsefattr((NMC), (VERS), &ttvattr); \
 695                 } \
 696                 if (!(E) && (NP)) \
 697                         (E) = nfs_loadattrcache((NP), &ttvattr, (X), 0); \
 698                 NVATTR_CLEANUP(&ttvattr); \
 699         } while (0)
 700
 701 /* get NFSv4 attr bitmap */
 702 #define nfsm_chain_get_bitmap(E, NMC, B, LEN) \
 703         do { \
 704                 uint32_t __len = 0, __i; \
 705                 nfsm_chain_get_32((E), (NMC), __len); \
 706                 if (E) break; \
 707                 for (__i=0; __i < MIN(__len, (LEN)); __i++) \
 708                         nfsm_chain_get_32((E), (NMC), (B)[__i]); \
 709                 if (E) break; \
 710                 for (; __i < __len; __i++) \
 711                         nfsm_chain_adv((E), (NMC), NFSX_UNSIGNED); \
 712                 for (; __i < (LEN); __i++) \
 713                         (B)[__i] = 0; \
 714                 (LEN) = __len; \
 715         } while (0)
 716
 717 /* get an NFSv4 "stateid" structure from an mbuf chain */
 718 #define nfsm_chain_get_stateid(E, NMC, SID) \
 719         do { \
 720                 nfsm_chain_get_32((E), (NMC), (SID)->seqid); \
 721                 nfsm_chain_get_32((E), (NMC), (SID)->other[0]); \
 722                 nfsm_chain_get_32((E), (NMC), (SID)->other[1]); \
 723                 nfsm_chain_get_32((E), (NMC), (SID)->other[2]); \
 724         } while (0)
 725
 726 #define nfsm_chain_skip_tag(E, NMC) \
 727         do { \
 728                 uint32_t __val = 0; \
 729                 nfsm_chain_get_32((E), (NMC), __val); \
 730                 nfsm_chain_adv((E), (NMC), nfsm_rndup(__val)); \
 731         } while (0)
 732
 733 #define nfsm_chain_op_check(E, NMC, OP) \
 734         do { \
 735                 uint32_t __val = 0; \
 736                 nfsm_chain_get_32((E), (NMC), __val); \
 737                 /* [sigh] some implementations return the "illegal" op for unsupported ops */ \
 738                 nfsm_assert((E), ((__val == (OP)) || (__val == NFS_OP_ILLEGAL)), EBADRPC); \
 739                 nfsm_chain_get_32((E), (NMC), __val); \
 740                 nfsm_assert((E), (__val == NFS_OK), __val); \
 741         } while (0)
 742
 743 #define nfsm_chain_check_change_info(E, NMC, DNP) \
 744         do { \
 745                 uint64_t __ci_before, __ci_after; \
 746                 uint32_t __ci_atomic = 0; \
 747                 nfsm_chain_get_32((E), (NMC), __ci_atomic); \
 748                 nfsm_chain_get_64((E), (NMC), __ci_before); \
 749                 nfsm_chain_get_64((E), (NMC), __ci_after); \
 750                 if ((E) || !(DNP)) break; \
 751                 if (__ci_atomic && (__ci_before == (DNP)->n_ncchange)) { \
 752                         (DNP)->n_ncchange = __ci_after; \
 753                 } else { \
 754                         cache_purge(NFSTOV(DNP)); \
 755                         (DNP)->n_ncgen++; \
 756                 } \
 757         } while (0)
 758
 759 #endif /* __APPLE_API_PRIVATE */
 760 #endif /* _NFS_NFSM_SUBS_H_ */