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                 if ((VERS) == NFS_VER3) \
 148                         VATTR_WANTED((VAP), va_filerev); \
 149         } while (0)
 150
 151 /* Initialize a vnode_attr to retrieve pre-operation attributes for the NFS server. */
 152 #define nfsm_srv_pre_vattr_init(VAP) \
 153         do { \
 154                 VATTR_INIT(VAP); \
 155                 VATTR_WANTED((VAP), va_data_size); \
 156                 VATTR_WANTED((VAP), va_modify_time); \
 157                 VATTR_WANTED((VAP), va_change_time); \
 158         } while (0)
 159
 160 /* round up to a multiple of 4 */
 161 #define nfsm_rndup(a)   (((a)+3)&(~0x3))
 162
 163 #define nfsm_pad(a)     (nfsm_rndup(a) - (a))
 164
 165 /*
 166  * control flow macros:
 167  * go to the appropriate label on condition
 168  */
 169 #define nfsmout_if(E)   do { if (E) goto nfsmout; } while (0)
 170 #define nfsmerr_if(E)   do { if (E) goto nfsmerr; } while (0)
 171
 172 /*
 173  * For NFS v2 errors and EBADRPC, the reply contains only the error.
 174  * This macro is used to skip any reply building code and go straight
 175  * to nfsmout instead.
 176  */
 177 #define nfsmout_on_status(ND, E) \
 178         do { \
 179                 if (((ND)->nd_repstat == EBADRPC) || \
 180                     ((ND)->nd_repstat && ((ND)->nd_vers == NFS_VER2))) { \
 181                         (E) = 0; \
 182                         goto nfsmout; \
 183                 } \
 184         } while (0)
 185
 186 /* initialize an mbuf chain */
 187 #define nfsm_chain_null(NMC) \
 188         do { \
 189                 (NMC)->nmc_mhead = (NMC)->nmc_mcur = NULL; \
 190                 (NMC)->nmc_ptr = NULL; \
 191         } while (0)
 192
 193 /* cleanup an mbuf chain */
 194 #define nfsm_chain_cleanup(NMC) \
 195         do { \
 196                 if (!(NMC)->nmc_mhead) break; \
 197                 mbuf_freem((NMC)->nmc_mhead); \
 198                 nfsm_chain_null(NMC); \
 199         } while (0)
 200
 201 /* get an mbuf given a size hint */
 202 #define nfsm_mbuf_get(E, MBP, SIZEHINT) \
 203         do { \
 204                 *(MBP) = NULL; \
 205                 if ((size_t)(SIZEHINT) >= nfs_mbuf_minclsize) \
 206                         (E) = mbuf_mclget(MBUF_WAITOK, MBUF_TYPE_DATA, (MBP)); \
 207                 else \
 208                         (E) = mbuf_get(MBUF_WAITOK, MBUF_TYPE_DATA, (MBP)); \
 209         } while (0)
 210
 211
 212 /*
 213  * macros for building NFS mbuf chains
 214  */
 215
 216 /* prepare an mbuf chain for building starting with the given mbuf */
 217 #define nfsm_chain_init(NMC, MB) \
 218         do { \
 219                 (NMC)->nmc_mhead = (MB); \
 220                 (NMC)->nmc_mcur = (NMC)->nmc_mhead; \
 221                 (NMC)->nmc_ptr = mbuf_data((NMC)->nmc_mcur); \
 222                 (NMC)->nmc_left = mbuf_trailingspace((NMC)->nmc_mcur); \
 223                 (NMC)->nmc_flags = 0; \
 224         } while (0)
 225
 226 /* prepare an mbuf chain for building starting with a newly allocated mbuf */
 227 #define nfsm_chain_build_alloc_init(E, NMC, SIZEHINT) \
 228         do { \
 229                 mbuf_t ncbimb; \
 230                 nfsm_mbuf_get((E), &ncbimb, (SIZEHINT)); \
 231                 if (E) break; \
 232                 nfsm_chain_init((NMC), ncbimb); \
 233         } while (0)
 234
 235 /* done building an mbuf chain */
 236 #define nfsm_chain_build_done(E, NMC) \
 237         do { \
 238                 if ((E) || !(NMC)->nmc_mcur) break; \
 239                 /* cap off current mbuf */ \
 240                 mbuf_setlen((NMC)->nmc_mcur, \
 241                         (NMC)->nmc_ptr - (caddr_t)mbuf_data((NMC)->nmc_mcur)); \
 242         } while (0)
 243
 244 /*
 245  *  set the TCP record mark at the head of an mbuf chain -
 246  *  assumes 4 bytes are already allocated in the head mbuf
 247  */
 248 #define nfsm_chain_set_recmark(E, NMC, VAL) \
 249         do { \
 250                 if (E) break; \
 251                 *((uint32_t*)mbuf_data((NMC)->nmc_mhead)) \
 252                         = txdr_unsigned(VAL); \
 253         } while (0)
 254
 255 /* make sure there's room for size bytes in current mbuf */
 256 #define nfsm_chain_check_size(E, NMC, SIZE) \
 257         do { \
 258                 if (E) break; \
 259                 if ((NMC)->nmc_left < (SIZE)) { \
 260                         (E) = nfsm_chain_new_mbuf((NMC), (SIZE)); \
 261                         if (!(E) && ((NMC)->nmc_left < (SIZE))) \
 262                                 (E) = ENOMEM; \
 263                 } \
 264         } while (0)
 265
 266 /* add a 32bit value to an mbuf chain extending if necessary */
 267 #define nfsm_chain_add_32(E, NMC, VAL) \
 268         do { \
 269                 nfsm_chain_check_size((E), (NMC), NFSX_UNSIGNED); \
 270                 if (E) break; \
 271                 *((uint32_t*)(NMC)->nmc_ptr) = txdr_unsigned(VAL); \
 272                 (NMC)->nmc_ptr += NFSX_UNSIGNED; \
 273                 (NMC)->nmc_left -= NFSX_UNSIGNED; \
 274         } while (0)
 275
 276 /* add a 64bit value to an mbuf chain */
 277 #define nfsm_chain_add_64(E, NMC, VAL) \
 278         do { \
 279                 uint64_t __tmp64; \
 280                 nfsm_chain_check_size((E), (NMC), 2 * NFSX_UNSIGNED); \
 281                 if (E) break; \
 282                 __tmp64 = (VAL); \
 283                 txdr_hyper(&__tmp64, (NMC)->nmc_ptr); \
 284                 (NMC)->nmc_ptr += 2 * NFSX_UNSIGNED; \
 285                 (NMC)->nmc_left -= 2 * NFSX_UNSIGNED; \
 286         } while (0)
 287
 288 /* zero the last 4 bytes for a range of opaque */
 289 /* data to make sure any pad bytes will be zero. */
 290 #define nfsm_chain_zero_opaque_pad(BUF, LEN) \
 291         do { \
 292                 if ((LEN) > 0) \
 293                         *(((uint32_t*)(BUF))+((nfsm_rndup(LEN)>>2)-1)) = 0; \
 294         } while (0)
 295
 296 /* add buffer of opaque data to an mbuf chain */
 297 #define nfsm_chain_add_opaque(E, NMC, BUF, LEN) \
 298         do { \
 299                 uint32_t rndlen = nfsm_rndup(LEN); \
 300                 if (E) break; \
 301                 if ((NMC)->nmc_left < rndlen) { \
 302                         (E) = nfsm_chain_add_opaque_f((NMC), (const u_char*)(BUF), (LEN)); \
 303                         break; \
 304                 } \
 305                 nfsm_chain_zero_opaque_pad((NMC)->nmc_ptr, (LEN)); \
 306                 bcopy((BUF), (NMC)->nmc_ptr, (LEN)); \
 307                 (NMC)->nmc_ptr += rndlen; \
 308                 (NMC)->nmc_left -= rndlen; \
 309         } while (0)
 310
 311 /* add buffer of opaque data to an mbuf chain without padding */
 312 #define nfsm_chain_add_opaque_nopad(E, NMC, BUF, LEN) \
 313         do { \
 314                 if (E) break; \
 315                 if ((NMC)->nmc_left < (uint32_t) (LEN)) { \
 316                         (E) = nfsm_chain_add_opaque_nopad_f((NMC), (const u_char*)(BUF), (LEN)); \
 317                         break; \
 318                 } \
 319                 bcopy((BUF), (NMC)->nmc_ptr, (LEN)); \
 320                 (NMC)->nmc_ptr += (LEN); \
 321                 (NMC)->nmc_left -= (LEN); \
 322         } while (0)
 323
 324 /* finish an mbuf in a chain to allow subsequent insertion */
 325 #define nfsm_chain_finish_mbuf(E, NMC) \
 326         do { \
 327                 if (E) break; \
 328                 mbuf_setlen((NMC)->nmc_mcur, \
 329                         (NMC)->nmc_ptr - (caddr_t)mbuf_data((NMC)->nmc_mcur)); \
 330                 (NMC)->nmc_left = 0; \
 331         } while (0)
 332
 333 /* add a file handle to an mbuf chain */
 334 #define nfsm_chain_add_fh(E, NMC, VERS, FHP, FHLEN) \
 335         do { \
 336                 if (E) break; \
 337                 if ((VERS) != NFS_VER2) \
 338                         nfsm_chain_add_32((E), (NMC), (FHLEN)); \
 339                 nfsm_chain_add_opaque((E), (NMC), (FHP), (FHLEN)); \
 340         } while (0)
 341
 342 /* add a string to an mbuf chain */
 343 #define nfsm_chain_add_string(E, NMC, STR, LEN) \
 344         do { \
 345                 nfsm_chain_add_32((E), (NMC), (LEN)); \
 346                 nfsm_chain_add_opaque((E), (NMC), (STR), (LEN)); \
 347         } while (0)
 348
 349 /* add a name to an mbuf chain */
 350 #define nfsm_chain_add_name(E, NMC, STR, LEN, NMP) \
 351         do { \
 352                 if (E) break; \
 353                 if (NMFLAG((NMP), NFC)) \
 354                         (E) = nfsm_chain_add_string_nfc((NMC), (const uint8_t*)(STR), (LEN)); \
 355                 else \
 356                         nfsm_chain_add_string((E), (NMC), (STR), (LEN)); \
 357         } while (0)
 358
 359 /* add an NFSv2 time to an mbuf chain */
 360 #define nfsm_chain_add_v2time(E, NMC, TVP) \
 361         do { \
 362                 if (TVP) { \
 363                         nfsm_chain_add_32((E), (NMC), (TVP)->tv_sec); \
 364                         nfsm_chain_add_32((E), (NMC), ((TVP)->tv_nsec != -1) ? \
 365                                 ((uint32_t)(TVP)->tv_nsec / 1000) : 0xffffffff); \
 366                 } else { \
 367                         /* no time... use -1 */ \
 368                         nfsm_chain_add_32((E), (NMC), -1); \
 369                         nfsm_chain_add_32((E), (NMC), -1); \
 370                 } \
 371         } while (0)
 372
 373 /* add an NFSv3 time to an mbuf chain */
 374 #define nfsm_chain_add_v3time(E, NMC, TVP) \
 375         do { \
 376                 nfsm_chain_add_32((E), (NMC), (TVP)->tv_sec); \
 377                 nfsm_chain_add_32((E), (NMC), (TVP)->tv_nsec); \
 378         } while (0)
 379
 380 /* add an NFS v2 or v3 time to an mbuf chain */
 381 #define nfsm_chain_add_time(E, NMC, VERS, TVP) \
 382         do { \
 383                 if ((VERS) == NFS_VER2) { \
 384                         nfsm_chain_add_v2time((E), (NMC), (TVP)); \
 385                 } else { \
 386                         nfsm_chain_add_v3time((E), (NMC), (TVP)); \
 387                 } \
 388         } while (0)
 389
 390 /* add an NFSv3 postop file handle to an mbuf chain */
 391 #define nfsm_chain_add_postop_fh(E, NMC, FHP, FHLEN) \
 392         do { \
 393                 nfsm_chain_add_32((E), (NMC), TRUE); \
 394                 nfsm_chain_add_fh((E), (NMC), NFS_VER3, (FHP), (FHLEN)); \
 395         } while (0)
 396
 397 /* add NFSv3 postop attributes to an mbuf chain */
 398 #define nfsm_chain_add_postop_attr(E, ND, NMC, ATTRERR, VAP) \
 399         do { \
 400                 if (E) break; \
 401                 if (ATTRERR) { \
 402                         nfsm_chain_add_32((E), (NMC), FALSE); \
 403                         break; \
 404                 } \
 405                 nfsm_chain_add_32((E), (NMC), TRUE); \
 406                 if (E) break; \
 407                 (E) = nfsm_chain_add_fattr((ND), (NMC), (VAP)); \
 408         } while (0)
 409
 410 /* Add an NFSv2 "sattr" structure to an mbuf chain */
 411 #define nfsm_chain_add_v2sattr(E, NMC, VAP, SZRDEV) \
 412         do { \
 413                 if (E) break; \
 414                 (E) = nfsm_chain_add_v2sattr_f((NMC), (VAP), (SZRDEV)); \
 415         } while (0)
 416
 417 /* Add an NFSv3 "sattr" structure to an mbuf chain */
 418 #define nfsm_chain_add_v3sattr(E, NMC, VAP) \
 419         do { \
 420                 if (E) break; \
 421                 (E) = nfsm_chain_add_v3sattr_f((NMC), (VAP)); \
 422         } while (0)
 423
 424 /* Add an NFSv4 "fattr" structure to an mbuf chain */
 425 #define nfsm_chain_add_fattr4(E, NMC, VAP, NMP) \
 426         do { \
 427                 if (E) break; \
 428                 (E) = nfsm_chain_add_fattr4_f((NMC), (VAP), (NMP)); \
 429         } while (0)
 430
 431 /* add NFSv3 WCC data to an mbuf chain */
 432 #define nfsm_chain_add_wcc_data(E, ND, NMC, PREERR, PREVAP, POSTERR, POSTVAP) \
 433         do { \
 434                 if (E) break; \
 435                 (E) = nfsm_chain_add_wcc_data_f((ND), (NMC), \
 436                         (PREERR), (PREVAP), (POSTERR), (POSTVAP)); \
 437         } while (0)
 438
 439 /* add NFSv4 COMPOUND header */
 440 #define NFS4_TAG_LENGTH 12
 441 #define nfsm_chain_add_compound_header(E, NMC, TAG, MINOR, NUMOPS) \
 442         do { \
 443                 if ((TAG) && strlen(TAG)) { \
 444                         /* put tags into a fixed-length space-padded field */ \
 445                         char __nfstag[NFS4_TAG_LENGTH+1]; \
 446                         snprintf(__nfstag, sizeof(__nfstag), "%-*s", NFS4_TAG_LENGTH, (TAG)); \
 447                         nfsm_chain_add_32((E), (NMC), NFS4_TAG_LENGTH); \
 448                         nfsm_chain_add_opaque((E), (NMC), __nfstag, NFS4_TAG_LENGTH); \
 449                 } else { \
 450                         nfsm_chain_add_32((E), (NMC), 0); \
 451                 } \
 452                 nfsm_chain_add_32((E), (NMC), (MINOR)); /*minorversion*/ \
 453                 nfsm_chain_add_32((E), (NMC), (NUMOPS)); \
 454         } while (0)
 455
 456 /* add NFSv4 attr bitmap */
 457 #define nfsm_chain_add_bitmap(E, NMC, B, LEN) \
 458         do { \
 459                 int __i; \
 460                 nfsm_chain_add_32((E), (NMC), (LEN)); \
 461                 for (__i=0; __i < (LEN); __i++) \
 462                         nfsm_chain_add_32((E), (NMC), (B)[__i]); \
 463         } while (0)
 464
 465 /* add NFSv4 attr bitmap masked with the given mask */
 466 #define nfsm_chain_add_bitmap_masked(E, NMC, B, LEN, MASK) \
 467         do { \
 468                 int __i; \
 469                 nfsm_chain_add_32((E), (NMC), (LEN)); \
 470                 for (__i=0; __i < (LEN); __i++) \
 471                         nfsm_chain_add_32((E), (NMC), ((B)[__i] & (MASK)[__i])); \
 472         } while (0)
 473
 474 /* add NFSv4 attr bitmap masked with the supported attributes for this mount/node */
 475 #define nfsm_chain_add_bitmap_supported(E, NMC, B, NMP, NP) \
 476         do { \
 477                 uint32_t __bitmap[NFS_ATTR_BITMAP_LEN], *__bmp = (B); \
 478                 int __nonamedattr = 0, __noacl = 0, __nomode = 0; \
 479                 if (!((NMP)->nm_fsattr.nfsa_flags & NFS_FSFLAG_NAMED_ATTR) || \
 480                     ((NP) && (((nfsnode_t)(NP))->n_flag & (NISDOTZFS|NISDOTZFSCHILD)))) \
 481                         __nonamedattr = 1; \
 482                 if (!((NMP)->nm_fsattr.nfsa_flags & NFS_FSFLAG_ACL)) \
 483                         __noacl = 1; \
 484                 if (NMFLAG((NMP), ACLONLY)) \
 485                         __nomode = 1; \
 486                 if (__nonamedattr || __noacl || __nomode) { \
 487                         /* don't ask for attrs we're not supporting */ \
 488                         /* some ".zfs" directories can't handle being asked for some attributes */ \
 489                         int __ii; \
 490                         NFS_CLEAR_ATTRIBUTES(__bitmap); \
 491                         for (__ii=0; __ii < NFS_ATTR_BITMAP_LEN; __ii++) \
 492                                 __bitmap[__ii] = (B)[__ii]; \
 493                         if (__nonamedattr) \
 494                                 NFS_BITMAP_CLR(__bitmap, NFS_FATTR_NAMED_ATTR); \
 495                         if (__noacl) \
 496                                 NFS_BITMAP_CLR(__bitmap, NFS_FATTR_ACL); \
 497                         if (__nomode) \
 498                                 NFS_BITMAP_CLR(__bitmap, NFS_FATTR_MODE); \
 499                         __bmp = __bitmap; \
 500                 } \
 501                 nfsm_chain_add_bitmap_masked((E), (NMC), __bmp, NFS_ATTR_BITMAP_LEN, (NMP)->nm_fsattr.nfsa_supp_attr); \
 502         } while (0)
 503
 504 /* Add an NFSv4 "stateid" structure to an mbuf chain */
 505 #define nfsm_chain_add_stateid(E, NMC, SID) \
 506         do { \
 507                 nfsm_chain_add_32((E), (NMC), (SID)->seqid); \
 508                 nfsm_chain_add_32((E), (NMC), (SID)->other[0]); \
 509                 nfsm_chain_add_32((E), (NMC), (SID)->other[1]); \
 510                 nfsm_chain_add_32((E), (NMC), (SID)->other[2]); \
 511         } while (0)
 512
 513 /* add an NFSv4 lock owner structure to an mbuf chain */
 514 #define nfsm_chain_add_lock_owner4(E, NMC, NMP, NLOP) \
 515         do { \
 516                 nfsm_chain_add_64((E), (NMC), (NMP)->nm_clientid); \
 517                 nfsm_chain_add_32((E), (NMC), 5*NFSX_UNSIGNED); \
 518                 nfsm_chain_add_32((E), (NMC), (NLOP)->nlo_name); \
 519                 nfsm_chain_add_32((E), (NMC), (NLOP)->nlo_pid); \
 520                 nfsm_chain_add_64((E), (NMC), (NLOP)->nlo_pid_start.tv_sec); \
 521                 nfsm_chain_add_32((E), (NMC), (NLOP)->nlo_pid_start.tv_usec); \
 522         } while (0)
 523
 524 /*
 525  * macros for dissecting NFS mbuf chains
 526  */
 527
 528 /* prepare an mbuf chain for dissection starting with the given mbuf */
 529 #define nfsm_chain_dissect_init(E, NMC, H) \
 530         do { \
 531                 if (!(H)) { \
 532                         (E) = EINVAL; \
 533                         break; \
 534                 } \
 535                 (NMC)->nmc_mcur = (NMC)->nmc_mhead = (H); \
 536                 (NMC)->nmc_ptr = mbuf_data(H); \
 537                 (NMC)->nmc_left = mbuf_len(H); \
 538         } while (0)
 539
 540 /* skip a number of bytes in an mbuf chain */
 541 #define nfsm_chain_adv(E, NMC, LEN) \
 542         do { \
 543                 if (E) break; \
 544                 if ((NMC)->nmc_left >= (uint32_t)(LEN)) { \
 545                         (NMC)->nmc_left -= (LEN); \
 546                         (NMC)->nmc_ptr += (LEN); \
 547                 } else { \
 548                         (E) = nfsm_chain_advance((NMC), (LEN)); \
 549                 } \
 550         } while (0)
 551
 552 /* get a 32bit value from an mbuf chain */
 553 #define nfsm_chain_get_32(E, NMC, LVAL) \
 554         do { \
 555                 uint32_t __tmp32, *__tmpptr; \
 556                 if (E) break; \
 557                 if ((NMC)->nmc_left >= NFSX_UNSIGNED) { \
 558                         __tmpptr = (uint32_t*)(NMC)->nmc_ptr; \
 559                         (NMC)->nmc_left -= NFSX_UNSIGNED; \
 560                         (NMC)->nmc_ptr += NFSX_UNSIGNED; \
 561                 } else { \
 562                         __tmpptr = &__tmp32; \
 563                         (E) = nfsm_chain_get_opaque_f((NMC), NFSX_UNSIGNED, (u_char*)__tmpptr); \
 564                         if (E) break; \
 565                 } \
 566                 (LVAL) = fxdr_unsigned(uint32_t, *__tmpptr); \
 567         } while (0)
 568
 569 /* get a 64bit value from an mbuf chain */
 570 #define nfsm_chain_get_64(E, NMC, LVAL) \
 571         do { \
 572                 uint64_t __tmp64, *__tmpptr; \
 573                 if (E) break; \
 574                 if ((NMC)->nmc_left >= 2 * NFSX_UNSIGNED) { \
 575                         __tmpptr = (uint64_t*)(NMC)->nmc_ptr; \
 576                         (NMC)->nmc_left -= 2 * NFSX_UNSIGNED; \
 577                         (NMC)->nmc_ptr += 2 * NFSX_UNSIGNED; \
 578                 } else { \
 579                         __tmpptr = &__tmp64; \
 580                         (E) = nfsm_chain_get_opaque_f((NMC), 2 * NFSX_UNSIGNED, (u_char*)__tmpptr); \
 581                         if (E) break; \
 582                 } \
 583                 fxdr_hyper(__tmpptr, &(LVAL)); \
 584         } while (0)
 585
 586 /* get a pointer to the next consecutive bytes in an mbuf chain */
 587 #define nfsm_chain_get_opaque_pointer(E, NMC, LEN, PTR) \
 588         do { \
 589                 uint32_t rndlen; \
 590                 if (E) break; \
 591                 rndlen = nfsm_rndup(LEN); \
 592                 if (rndlen < (LEN)) { \
 593                         (E) = EBADRPC; \
 594                         break; \
 595                 } \
 596                 if ((NMC)->nmc_left >= rndlen) { \
 597                         (PTR) = (void*)(NMC)->nmc_ptr; \
 598                         (NMC)->nmc_left -= rndlen; \
 599                         (NMC)->nmc_ptr += rndlen; \
 600                 } else { \
 601                         (E) = nfsm_chain_get_opaque_pointer_f((NMC), (LEN), (u_char**)&(PTR)); \
 602                 } \
 603         } while (0)
 604
 605 /* copy the next consecutive bytes of opaque data from an mbuf chain */
 606 #define nfsm_chain_get_opaque(E, NMC, LEN, PTR) \
 607         do { \
 608                 uint32_t rndlen; \
 609                 if (E) break; \
 610                 rndlen = nfsm_rndup(LEN); \
 611                 if (rndlen < (LEN)) { \
 612                         (E) = EBADRPC; \
 613                         break; \
 614                 } \
 615                 if ((NMC)->nmc_left >= rndlen) { \
 616                         u_char *__tmpptr = (u_char*)(NMC)->nmc_ptr; \
 617                         (NMC)->nmc_left -= rndlen; \
 618                         (NMC)->nmc_ptr += rndlen; \
 619                         bcopy(__tmpptr, (PTR), (LEN)); \
 620                 } else { \
 621                         (E) = nfsm_chain_get_opaque_f((NMC), (LEN), (u_char*)(PTR)); \
 622                 } \
 623         } while (0)
 624
 625 /* get the size of and a pointer to a file handle in an mbuf chain */
 626 #define nfsm_chain_get_fh_ptr(E, NMC, VERS, FHP, FHSIZE) \
 627         do { \
 628                 if ((VERS) != NFS_VER2) { \
 629                         nfsm_chain_get_32((E), (NMC), (FHSIZE)); \
 630                         if (E) break; \
 631                         if ((FHSIZE) > NFS_MAX_FH_SIZE) \
 632                                 (E) = EBADRPC; \
 633                 } else \
 634                         (FHSIZE) = NFSX_V2FH;\
 635                 if ((E) == 0) \
 636                         nfsm_chain_get_opaque_pointer((E), (NMC), (FHSIZE), (FHP));\
 637         } while (0)
 638
 639 /* get the size of and data for a file handle in an mbuf chain */
 640 #define nfsm_chain_get_fh(E, NMC, VERS, FHP) \
 641         do { \
 642                 if ((VERS) != NFS_VER2) { \
 643                         nfsm_chain_get_32((E), (NMC), (FHP)->fh_len); \
 644                         if ((FHP)->fh_len > sizeof((FHP)->fh_data)) \
 645                                 (E) = EBADRPC; \
 646                 } else \
 647                         (FHP)->fh_len = NFSX_V2FH;\
 648                 if ((E) == 0) \
 649                         nfsm_chain_get_opaque((E), (NMC), (uint32_t)(FHP)->fh_len, (FHP)->fh_data);\
 650                 else \
 651                         (FHP)->fh_len = 0;\
 652         } while (0)
 653
 654 /* get an NFS v2 or v3 time from an mbuf chain */
 655 #define nfsm_chain_get_time(E, NMC, VERS, TSEC, TNSEC) \
 656         do { \
 657                 nfsm_chain_get_32((E), (NMC), (TSEC)); \
 658                 nfsm_chain_get_32((E), (NMC), (TNSEC)); \
 659                 if ((E) || ((VERS) != NFS_VER2)) break; \
 660                 if ((uint32_t)(TNSEC) == 0xffffffff) \
 661                         (TNSEC) = 0; \
 662                 else \
 663                         (TNSEC) *= 1000; \
 664         } while (0)
 665
 666 /* get postop attributes from an mbuf chain */
 667 #define nfsm_chain_postop_attr_get(E, NMC, F, VAP) \
 668         do { \
 669                 (F) = 0; \
 670                 if ((E) || !(NMC)->nmc_mhead) break; \
 671                 nfsm_chain_get_32((E), (NMC), (F)); \
 672                 if ((E) || !(F)) break; \
 673                 if (((E) = nfs_parsefattr((NMC), NFS_VER3, (VAP)))) \
 674                         (F) = 0; \
 675         } while (0)
 676
 677 /* update a node's attribute cache with postop attributes from an mbuf chain */
 678 /* (F returns whether the attributes were updated or not) */
 679 #define nfsm_chain_postop_attr_update_flag(E, NMC, NP, F, X) \
 680         do { \
 681                 struct nfs_vattr ttvattr; \
 682                 nfsm_chain_postop_attr_get((E), (NMC), (F), &ttvattr); \
 683                 if ((E) || !(F)) break; \
 684                 if (((E) = nfs_loadattrcache((NP), &ttvattr, (X), 1))) { \
 685                         (F) = 0; \
 686                         break; \
 687                 } \
 688                 if (*(X) == 0) \
 689                         (F) = 0; \
 690         } while (0)
 691
 692 /* update a node's attribute cache with postop attributes from an mbuf chain */
 693 #define nfsm_chain_postop_attr_update(E, NMC, NP, X) \
 694         do { \
 695                 int __dummy_flag = 0; \
 696                 nfsm_chain_postop_attr_update_flag((E), (NMC), (NP), __dummy_flag, (X)); \
 697         } while (0)
 698
 699 /* get and process NFSv3 WCC data from an mbuf chain */
 700 #define nfsm_chain_get_wcc_data(E, NMC, NP, PREMTIME, NEWPOSTATTR, X) \
 701         do { \
 702                 if (E) break; \
 703                 (E) = nfsm_chain_get_wcc_data_f((NMC), (NP), (PREMTIME), (NEWPOSTATTR), (X)); \
 704         } while (0)
 705
 706 /* update a node's attribute cache with attributes from an mbuf chain */
 707 #define nfsm_chain_loadattr(E, NMC, NP, VERS, X) \
 708         do { \
 709                 struct nfs_vattr ttvattr; \
 710                 if (E) break; \
 711                 if ((VERS) == NFS_VER4) { \
 712                         (E) = nfs4_parsefattr((NMC), NULL, &ttvattr, NULL, NULL, NULL); \
 713                 } else { \
 714                         (E) = nfs_parsefattr((NMC), (VERS), &ttvattr); \
 715                 } \
 716                 if (!(E) && (NP)) \
 717                         (E) = nfs_loadattrcache((NP), &ttvattr, (X), 0); \
 718                 NVATTR_CLEANUP(&ttvattr); \
 719         } while (0)
 720
 721 /* get NFSv4 attr bitmap */
 722 #define nfsm_chain_get_bitmap(E, NMC, B, LEN) \
 723         do { \
 724                 uint32_t __len = 0, __i; \
 725                 nfsm_chain_get_32((E), (NMC), __len); \
 726                 if (E) break; \
 727                 for (__i=0; __i < MIN(__len, (LEN)); __i++) \
 728                         nfsm_chain_get_32((E), (NMC), (B)[__i]); \
 729                 if (E) break; \
 730                 for (; __i < __len; __i++) \
 731                         nfsm_chain_adv((E), (NMC), NFSX_UNSIGNED); \
 732                 for (; __i < (LEN); __i++) \
 733                         (B)[__i] = 0; \
 734                 (LEN) = __len; \
 735         } while (0)
 736
 737 /* get an NFSv4 "stateid" structure from an mbuf chain */
 738 #define nfsm_chain_get_stateid(E, NMC, SID) \
 739         do { \
 740                 nfsm_chain_get_32((E), (NMC), (SID)->seqid); \
 741                 nfsm_chain_get_32((E), (NMC), (SID)->other[0]); \
 742                 nfsm_chain_get_32((E), (NMC), (SID)->other[1]); \
 743                 nfsm_chain_get_32((E), (NMC), (SID)->other[2]); \
 744         } while (0)
 745
 746 #define nfsm_chain_skip_tag(E, NMC) \
 747         do { \
 748                 uint32_t __val = 0; \
 749                 nfsm_chain_get_32((E), (NMC), __val); \
 750                 nfsm_chain_adv((E), (NMC), nfsm_rndup(__val)); \
 751         } while (0)
 752
 753 #define nfsm_chain_op_check(E, NMC, OP) \
 754         do { \
 755                 uint32_t __val = 0; \
 756                 nfsm_chain_get_32((E), (NMC), __val); \
 757                 /* [sigh] some implementations return the "illegal" op for unsupported ops */ \
 758                 nfsm_assert((E), ((__val == (OP)) || (__val == NFS_OP_ILLEGAL)), EBADRPC); \
 759                 nfsm_chain_get_32((E), (NMC), __val); \
 760                 nfsm_assert((E), (__val == NFS_OK), __val); \
 761         } while (0)
 762
 763 #define nfsm_chain_check_change_info(E, NMC, DNP) \
 764         do { \
 765                 uint64_t __ci_before, __ci_after; \
 766                 uint32_t __ci_atomic = 0; \
 767                 nfsm_chain_get_32((E), (NMC), __ci_atomic); \
 768                 nfsm_chain_get_64((E), (NMC), __ci_before); \
 769                 nfsm_chain_get_64((E), (NMC), __ci_after); \
 770                 if ((E) || !(DNP)) break; \
 771                 if (__ci_atomic && (__ci_before == (DNP)->n_ncchange)) { \
 772                         (DNP)->n_ncchange = __ci_after; \
 773                 } else { \
 774                         cache_purge(NFSTOV(DNP)); \
 775                         (DNP)->n_ncgen++; \
 776                 } \
 777         } while (0)
 778
 779 #endif /* __APPLE_API_PRIVATE */
 780 #endif /* _NFS_NFSM_SUBS_H_ */