1/*
   2 *  Server-side XDR for NFSv4
   3 *
   4 *  Copyright (c) 2002 The Regents of the University of Michigan.
   5 *  All rights reserved.
   6 *
   7 *  Kendrick Smith <kmsmith@umich.edu>
   8 *  Andy Adamson   <andros@umich.edu>
   9 *
  10 *  Redistribution and use in source and binary forms, with or without
  11 *  modification, are permitted provided that the following conditions
  12 *  are met:
  13 *
  14 *  1. Redistributions of source code must retain the above copyright
  15 *     notice, this list of conditions and the following disclaimer.
  16 *  2. Redistributions in binary form must reproduce the above copyright
  17 *     notice, this list of conditions and the following disclaimer in the
  18 *     documentation and/or other materials provided with the distribution.
  19 *  3. Neither the name of the University nor the names of its
  20 *     contributors may be used to endorse or promote products derived
  21 *     from this software without specific prior written permission.
  22 *
  23 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  24 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  25 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  26 *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  28 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  29 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  30 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  31 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  32 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  33 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34 */
  35
  36#include <linux/file.h>
  37#include <linux/slab.h>
  38#include <linux/namei.h>
  39#include <linux/statfs.h>
  40#include <linux/utsname.h>
  41#include <linux/pagemap.h>
  42#include <linux/sunrpc/svcauth_gss.h>
 
 
 
 
 
  43
  44#include "idmap.h"
  45#include "acl.h"
  46#include "xdr4.h"
  47#include "vfs.h"
  48#include "state.h"
  49#include "cache.h"
  50#include "netns.h"
  51#include "pnfs.h"
 
 
 
  52
  53#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
  54#include <linux/security.h>
  55#endif
  56
  57
  58#define NFSDDBG_FACILITY		NFSDDBG_XDR
  59
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  60/*
  61 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
  62 * directory in order to indicate to the client that a filesystem boundary is present
  63 * We use a fixed fsid for a referral
  64 */
  65#define NFS4_REFERRAL_FSID_MAJOR	0x8000000ULL
  66#define NFS4_REFERRAL_FSID_MINOR	0x8000000ULL
  67
  68static __be32
  69check_filename(char *str, int len)
  70{
  71	int i;
  72
  73	if (len == 0)
  74		return nfserr_inval;
 
 
  75	if (isdotent(str, len))
  76		return nfserr_badname;
  77	for (i = 0; i < len; i++)
  78		if (str[i] == '/')
  79			return nfserr_badname;
  80	return 0;
  81}
  82
  83#define DECODE_HEAD				\
  84	__be32 *p;				\
  85	__be32 status
  86#define DECODE_TAIL				\
  87	status = 0;				\
  88out:						\
  89	return status;				\
  90xdr_error:					\
  91	dprintk("NFSD: xdr error (%s:%d)\n",	\
  92			__FILE__, __LINE__);	\
  93	status = nfserr_bad_xdr;		\
  94	goto out
  95
  96#define READMEM(x,nbytes) do {			\
  97	x = (char *)p;				\
  98	p += XDR_QUADLEN(nbytes);		\
  99} while (0)
 100#define SAVEMEM(x,nbytes) do {			\
 101	if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
 102 		savemem(argp, p, nbytes) :	\
 103 		(char *)p)) {			\
 104		dprintk("NFSD: xdr error (%s:%d)\n", \
 105				__FILE__, __LINE__); \
 106		goto xdr_error;			\
 107		}				\
 108	p += XDR_QUADLEN(nbytes);		\
 109} while (0)
 110#define COPYMEM(x,nbytes) do {			\
 111	memcpy((x), p, nbytes);			\
 112	p += XDR_QUADLEN(nbytes);		\
 113} while (0)
 114
 115/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
 116#define READ_BUF(nbytes)  do {			\
 117	if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) {	\
 118		p = argp->p;			\
 119		argp->p += XDR_QUADLEN(nbytes);	\
 120	} else if (!(p = read_buf(argp, nbytes))) { \
 121		dprintk("NFSD: xdr error (%s:%d)\n", \
 122				__FILE__, __LINE__); \
 123		goto xdr_error;			\
 124	}					\
 125} while (0)
 126
 127static void next_decode_page(struct nfsd4_compoundargs *argp)
 128{
 129	argp->p = page_address(argp->pagelist[0]);
 130	argp->pagelist++;
 131	if (argp->pagelen < PAGE_SIZE) {
 132		argp->end = argp->p + (argp->pagelen>>2);
 133		argp->pagelen = 0;
 134	} else {
 135		argp->end = argp->p + (PAGE_SIZE>>2);
 136		argp->pagelen -= PAGE_SIZE;
 137	}
 138}
 139
 140static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
 141{
 142	/* We want more bytes than seem to be available.
 143	 * Maybe we need a new page, maybe we have just run out
 144	 */
 145	unsigned int avail = (char *)argp->end - (char *)argp->p;
 146	__be32 *p;
 147	if (avail + argp->pagelen < nbytes)
 148		return NULL;
 149	if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
 150		return NULL;
 151	/* ok, we can do it with the current plus the next page */
 152	if (nbytes <= sizeof(argp->tmp))
 153		p = argp->tmp;
 154	else {
 155		kfree(argp->tmpp);
 156		p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
 157		if (!p)
 158			return NULL;
 159		
 160	}
 161	/*
 162	 * The following memcpy is safe because read_buf is always
 163	 * called with nbytes > avail, and the two cases above both
 164	 * guarantee p points to at least nbytes bytes.
 165	 */
 166	memcpy(p, argp->p, avail);
 167	next_decode_page(argp);
 168	memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
 169	argp->p += XDR_QUADLEN(nbytes - avail);
 170	return p;
 171}
 172
 173static int zero_clientid(clientid_t *clid)
 174{
 175	return (clid->cl_boot == 0) && (clid->cl_id == 0);
 176}
 177
 178/**
 179 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
 180 * @argp: NFSv4 compound argument structure
 181 * @p: pointer to be freed (with kfree())
 182 *
 183 * Marks @p to be freed when processing the compound operation
 184 * described in @argp finishes.
 185 */
 186static void *
 187svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
 188{
 189	struct svcxdr_tmpbuf *tb;
 190
 191	tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
 192	if (!tb)
 193		return NULL;
 194	tb->next = argp->to_free;
 195	argp->to_free = tb;
 196	return tb->buf;
 197}
 198
 199/*
 200 * For xdr strings that need to be passed to other kernel api's
 201 * as null-terminated strings.
 202 *
 203 * Note null-terminating in place usually isn't safe since the
 204 * buffer might end on a page boundary.
 205 */
 206static char *
 207svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
 208{
 209	char *p = svcxdr_tmpalloc(argp, len + 1);
 210
 211	if (!p)
 212		return NULL;
 213	memcpy(p, buf, len);
 214	p[len] = '\0';
 215	return p;
 216}
 217
 218/**
 219 * savemem - duplicate a chunk of memory for later processing
 220 * @argp: NFSv4 compound argument structure to be freed with
 221 * @p: pointer to be duplicated
 222 * @nbytes: length to be duplicated
 223 *
 224 * Returns a pointer to a copy of @nbytes bytes of memory at @p
 225 * that are preserved until processing of the NFSv4 compound
 226 * operation described by @argp finishes.
 227 */
 228static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
 229{
 230	void *ret;
 231
 232	ret = svcxdr_tmpalloc(argp, nbytes);
 233	if (!ret)
 
 
 
 
 
 
 
 234		return NULL;
 235	memcpy(ret, p, nbytes);
 236	return ret;
 237}
 238
 239/*
 240 * We require the high 32 bits of 'seconds' to be 0, and
 241 * we ignore all 32 bits of 'nseconds'.
 
 
 
 
 242 */
 243static __be32
 244nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv)
 245{
 246	DECODE_HEAD;
 247	u64 sec;
 248
 249	READ_BUF(12);
 250	p = xdr_decode_hyper(p, &sec);
 251	tv->tv_sec = sec;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 252	tv->tv_nsec = be32_to_cpup(p++);
 253	if (tv->tv_nsec >= (u32)1000000000)
 254		return nfserr_inval;
 
 
 255
 256	DECODE_TAIL;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 257}
 258
 259static __be32
 260nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 261{
 262	u32 bmlen;
 263	DECODE_HEAD;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 264
 265	bmval[0] = 0;
 266	bmval[1] = 0;
 267	bmval[2] = 0;
 
 
 
 268
 269	READ_BUF(4);
 270	bmlen = be32_to_cpup(p++);
 271	if (bmlen > 1000)
 272		goto xdr_error;
 273
 274	READ_BUF(bmlen << 2);
 275	if (bmlen > 0)
 276		bmval[0] = be32_to_cpup(p++);
 277	if (bmlen > 1)
 278		bmval[1] = be32_to_cpup(p++);
 279	if (bmlen > 2)
 280		bmval[2] = be32_to_cpup(p++);
 
 
 
 
 281
 282	DECODE_TAIL;
 283}
 284
 285static __be32
 286nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
 287		   struct iattr *iattr, struct nfs4_acl **acl,
 288		   struct xdr_netobj *label)
 289{
 290	int expected_len, len = 0;
 291	u32 dummy32;
 292	char *buf;
 293
 294	DECODE_HEAD;
 295	iattr->ia_valid = 0;
 296	if ((status = nfsd4_decode_bitmap(argp, bmval)))
 297		return status;
 
 298
 299	READ_BUF(4);
 300	expected_len = be32_to_cpup(p++);
 
 
 
 
 
 
 
 
 
 301
 302	if (bmval[0] & FATTR4_WORD0_SIZE) {
 303		READ_BUF(8);
 304		len += 8;
 305		p = xdr_decode_hyper(p, &iattr->ia_size);
 
 
 306		iattr->ia_valid |= ATTR_SIZE;
 307	}
 308	if (bmval[0] & FATTR4_WORD0_ACL) {
 309		u32 nace;
 310		struct nfs4_ace *ace;
 311
 312		READ_BUF(4); len += 4;
 313		nace = be32_to_cpup(p++);
 314
 315		if (nace > NFS4_ACL_MAX)
 316			return nfserr_fbig;
 317
 318		*acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
 319		if (*acl == NULL)
 320			return nfserr_jukebox;
 321
 322		(*acl)->naces = nace;
 323		for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
 324			READ_BUF(16); len += 16;
 325			ace->type = be32_to_cpup(p++);
 326			ace->flag = be32_to_cpup(p++);
 327			ace->access_mask = be32_to_cpup(p++);
 328			dummy32 = be32_to_cpup(p++);
 329			READ_BUF(dummy32);
 330			len += XDR_QUADLEN(dummy32) << 2;
 331			READMEM(buf, dummy32);
 332			ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
 333			status = nfs_ok;
 334			if (ace->whotype != NFS4_ACL_WHO_NAMED)
 335				;
 336			else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
 337				status = nfsd_map_name_to_gid(argp->rqstp,
 338						buf, dummy32, &ace->who_gid);
 339			else
 340				status = nfsd_map_name_to_uid(argp->rqstp,
 341						buf, dummy32, &ace->who_uid);
 342			if (status)
 343				return status;
 344		}
 345	} else
 346		*acl = NULL;
 347	if (bmval[1] & FATTR4_WORD1_MODE) {
 348		READ_BUF(4);
 349		len += 4;
 350		iattr->ia_mode = be32_to_cpup(p++);
 
 
 351		iattr->ia_mode &= (S_IFMT | S_IALLUGO);
 352		iattr->ia_valid |= ATTR_MODE;
 353	}
 354	if (bmval[1] & FATTR4_WORD1_OWNER) {
 355		READ_BUF(4);
 356		len += 4;
 357		dummy32 = be32_to_cpup(p++);
 358		READ_BUF(dummy32);
 359		len += (XDR_QUADLEN(dummy32) << 2);
 360		READMEM(buf, dummy32);
 361		if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
 
 
 
 362			return status;
 363		iattr->ia_valid |= ATTR_UID;
 364	}
 365	if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
 366		READ_BUF(4);
 367		len += 4;
 368		dummy32 = be32_to_cpup(p++);
 369		READ_BUF(dummy32);
 370		len += (XDR_QUADLEN(dummy32) << 2);
 371		READMEM(buf, dummy32);
 372		if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
 
 
 
 373			return status;
 374		iattr->ia_valid |= ATTR_GID;
 375	}
 376	if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
 377		READ_BUF(4);
 378		len += 4;
 379		dummy32 = be32_to_cpup(p++);
 380		switch (dummy32) {
 
 381		case NFS4_SET_TO_CLIENT_TIME:
 382			len += 12;
 383			status = nfsd4_decode_time(argp, &iattr->ia_atime);
 384			if (status)
 385				return status;
 386			iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
 387			break;
 388		case NFS4_SET_TO_SERVER_TIME:
 389			iattr->ia_valid |= ATTR_ATIME;
 390			break;
 391		default:
 392			goto xdr_error;
 393		}
 394	}
 
 
 
 
 
 
 
 
 
 395	if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
 396		READ_BUF(4);
 397		len += 4;
 398		dummy32 = be32_to_cpup(p++);
 399		switch (dummy32) {
 
 400		case NFS4_SET_TO_CLIENT_TIME:
 401			len += 12;
 402			status = nfsd4_decode_time(argp, &iattr->ia_mtime);
 403			if (status)
 404				return status;
 405			iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
 406			break;
 407		case NFS4_SET_TO_SERVER_TIME:
 408			iattr->ia_valid |= ATTR_MTIME;
 409			break;
 410		default:
 411			goto xdr_error;
 412		}
 413	}
 414
 415	label->len = 0;
 416#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
 417	if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
 418		READ_BUF(4);
 419		len += 4;
 420		dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
 421		READ_BUF(4);
 422		len += 4;
 423		dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
 424		READ_BUF(4);
 425		len += 4;
 426		dummy32 = be32_to_cpup(p++);
 427		READ_BUF(dummy32);
 428		if (dummy32 > NFS4_MAXLABELLEN)
 429			return nfserr_badlabel;
 430		len += (XDR_QUADLEN(dummy32) << 2);
 431		READMEM(buf, dummy32);
 432		label->len = dummy32;
 433		label->data = svcxdr_dupstr(argp, buf, dummy32);
 434		if (!label->data)
 435			return nfserr_jukebox;
 436	}
 437#endif
 
 438
 439	if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
 440	    || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
 441	    || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
 442		READ_BUF(expected_len - len);
 443	else if (len != expected_len)
 444		goto xdr_error;
 
 
 
 
 445
 446	DECODE_TAIL;
 
 
 
 
 447}
 448
 449static __be32
 450nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
 451{
 452	DECODE_HEAD;
 453
 454	READ_BUF(sizeof(stateid_t));
 
 
 455	sid->si_generation = be32_to_cpup(p++);
 456	COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
 
 
 457
 458	DECODE_TAIL;
 
 
 
 
 
 
 
 
 
 459}
 460
 461static __be32
 462nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
 
 463{
 464	DECODE_HEAD;
 465
 466	READ_BUF(4);
 467	access->ac_req_access = be32_to_cpup(p++);
 
 
 
 
 
 
 
 
 
 
 468
 469	DECODE_TAIL;
 
 
 
 
 470}
 471
 472static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
 
 
 473{
 474	DECODE_HEAD;
 475	u32 dummy, uid, gid;
 476	char *machine_name;
 477	int i;
 478	int nr_secflavs;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 479
 480	/* callback_sec_params4 */
 481	READ_BUF(4);
 482	nr_secflavs = be32_to_cpup(p++);
 483	if (nr_secflavs)
 484		cbs->flavor = (u32)(-1);
 485	else
 486		/* Is this legal? Be generous, take it to mean AUTH_NONE: */
 487		cbs->flavor = 0;
 
 488	for (i = 0; i < nr_secflavs; ++i) {
 489		READ_BUF(4);
 490		dummy = be32_to_cpup(p++);
 491		switch (dummy) {
 492		case RPC_AUTH_NULL:
 493			/* Nothing to read */
 494			if (cbs->flavor == (u32)(-1))
 495				cbs->flavor = RPC_AUTH_NULL;
 496			break;
 497		case RPC_AUTH_UNIX:
 498			READ_BUF(8);
 499			/* stamp */
 500			dummy = be32_to_cpup(p++);
 501
 502			/* machine name */
 503			dummy = be32_to_cpup(p++);
 504			READ_BUF(dummy);
 505			SAVEMEM(machine_name, dummy);
 506
 507			/* uid, gid */
 508			READ_BUF(8);
 509			uid = be32_to_cpup(p++);
 510			gid = be32_to_cpup(p++);
 511
 512			/* more gids */
 513			READ_BUF(4);
 514			dummy = be32_to_cpup(p++);
 515			READ_BUF(dummy * 4);
 516			if (cbs->flavor == (u32)(-1)) {
 517				kuid_t kuid = make_kuid(&init_user_ns, uid);
 518				kgid_t kgid = make_kgid(&init_user_ns, gid);
 519				if (uid_valid(kuid) && gid_valid(kgid)) {
 520					cbs->uid = kuid;
 521					cbs->gid = kgid;
 522					cbs->flavor = RPC_AUTH_UNIX;
 523				} else {
 524					dprintk("RPC_AUTH_UNIX with invalid"
 525						"uid or gid ignoring!\n");
 526				}
 527			}
 528			break;
 529		case RPC_AUTH_GSS:
 530			dprintk("RPC_AUTH_GSS callback secflavor "
 531				"not supported!\n");
 532			READ_BUF(8);
 533			/* gcbp_service */
 534			dummy = be32_to_cpup(p++);
 535			/* gcbp_handle_from_server */
 536			dummy = be32_to_cpup(p++);
 537			READ_BUF(dummy);
 538			p += XDR_QUADLEN(dummy);
 539			/* gcbp_handle_from_client */
 540			READ_BUF(4);
 541			dummy = be32_to_cpup(p++);
 542			READ_BUF(dummy);
 543			break;
 544		default:
 545			dprintk("Illegal callback secflavor\n");
 546			return nfserr_inval;
 547		}
 548	}
 549	DECODE_TAIL;
 550}
 551
 552static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
 553{
 554	DECODE_HEAD;
 555
 556	READ_BUF(4);
 557	bc->bc_cb_program = be32_to_cpup(p++);
 558	nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
 559
 560	DECODE_TAIL;
 561}
 
 562
 563static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
 
 
 564{
 565	DECODE_HEAD;
 566
 567	READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
 568	COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
 569	bcts->dir = be32_to_cpup(p++);
 570	/* XXX: skipping ctsa_use_conn_in_rdma_mode.  Perhaps Tom Tucker
 571	 * could help us figure out we should be using it. */
 572	DECODE_TAIL;
 573}
 574
 575static __be32
 576nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
 577{
 578	DECODE_HEAD;
 579
 580	READ_BUF(4);
 581	close->cl_seqid = be32_to_cpup(p++);
 582	return nfsd4_decode_stateid(argp, &close->cl_stateid);
 583
 584	DECODE_TAIL;
 585}
 586
 587
 588static __be32
 589nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
 590{
 591	DECODE_HEAD;
 592
 593	READ_BUF(12);
 594	p = xdr_decode_hyper(p, &commit->co_offset);
 595	commit->co_count = be32_to_cpup(p++);
 596
 597	DECODE_TAIL;
 598}
 599
 600static __be32
 601nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
 602{
 603	DECODE_HEAD;
 
 604
 605	READ_BUF(4);
 606	create->cr_type = be32_to_cpup(p++);
 
 607	switch (create->cr_type) {
 608	case NF4LNK:
 609		READ_BUF(4);
 610		create->cr_datalen = be32_to_cpup(p++);
 611		READ_BUF(create->cr_datalen);
 
 
 612		create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
 613		if (!create->cr_data)
 614			return nfserr_jukebox;
 615		break;
 616	case NF4BLK:
 617	case NF4CHR:
 618		READ_BUF(8);
 619		create->cr_specdata1 = be32_to_cpup(p++);
 620		create->cr_specdata2 = be32_to_cpup(p++);
 
 621		break;
 622	case NF4SOCK:
 623	case NF4FIFO:
 624	case NF4DIR:
 625	default:
 626		break;
 627	}
 628
 629	READ_BUF(4);
 630	create->cr_namelen = be32_to_cpup(p++);
 631	READ_BUF(create->cr_namelen);
 632	SAVEMEM(create->cr_name, create->cr_namelen);
 633	if ((status = check_filename(create->cr_name, create->cr_namelen)))
 634		return status;
 635
 636	status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
 637				    &create->cr_acl, &create->cr_label);
 
 638	if (status)
 639		goto out;
 640
 641	DECODE_TAIL;
 642}
 643
 644static inline __be32
 645nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
 646{
 647	return nfsd4_decode_stateid(argp, &dr->dr_stateid);
 
 648}
 649
 650static inline __be32
 651nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
 652{
 653	return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
 
 
 
 654}
 655
 656static __be32
 657nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
 658{
 659	DECODE_HEAD;
 
 
 
 660
 661	READ_BUF(4);
 662	link->li_namelen = be32_to_cpup(p++);
 663	READ_BUF(link->li_namelen);
 664	SAVEMEM(link->li_name, link->li_namelen);
 665	if ((status = check_filename(link->li_name, link->li_namelen)))
 666		return status;
 667
 668	DECODE_TAIL;
 
 
 
 
 
 
 
 
 669}
 670
 671static __be32
 672nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
 
 673{
 674	DECODE_HEAD;
 675
 676	/*
 677	* type, reclaim(boolean), offset, length, new_lock_owner(boolean)
 678	*/
 679	READ_BUF(28);
 680	lock->lk_type = be32_to_cpup(p++);
 681	if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
 682		goto xdr_error;
 683	lock->lk_reclaim = be32_to_cpup(p++);
 684	p = xdr_decode_hyper(p, &lock->lk_offset);
 685	p = xdr_decode_hyper(p, &lock->lk_length);
 686	lock->lk_is_new = be32_to_cpup(p++);
 687
 688	if (lock->lk_is_new) {
 689		READ_BUF(4);
 690		lock->lk_new_open_seqid = be32_to_cpup(p++);
 691		status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
 692		if (status)
 693			return status;
 694		READ_BUF(8 + sizeof(clientid_t));
 695		lock->lk_new_lock_seqid = be32_to_cpup(p++);
 696		COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
 697		lock->lk_new_owner.len = be32_to_cpup(p++);
 698		READ_BUF(lock->lk_new_owner.len);
 699		READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
 700	} else {
 701		status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
 702		if (status)
 703			return status;
 704		READ_BUF(4);
 705		lock->lk_old_lock_seqid = be32_to_cpup(p++);
 706	}
 707
 708	DECODE_TAIL;
 
 
 
 
 
 
 
 709}
 710
 711static __be32
 712nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
 713{
 714	DECODE_HEAD;
 715		        
 716	READ_BUF(32);
 717	lockt->lt_type = be32_to_cpup(p++);
 718	if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
 719		goto xdr_error;
 720	p = xdr_decode_hyper(p, &lockt->lt_offset);
 721	p = xdr_decode_hyper(p, &lockt->lt_length);
 722	COPYMEM(&lockt->lt_clientid, 8);
 723	lockt->lt_owner.len = be32_to_cpup(p++);
 724	READ_BUF(lockt->lt_owner.len);
 725	READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
 
 
 726
 727	DECODE_TAIL;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 728}
 729
 730static __be32
 731nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
 732{
 733	DECODE_HEAD;
 
 734
 735	READ_BUF(8);
 736	locku->lu_type = be32_to_cpup(p++);
 737	if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
 738		goto xdr_error;
 739	locku->lu_seqid = be32_to_cpup(p++);
 740	status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
 
 741	if (status)
 742		return status;
 743	READ_BUF(16);
 744	p = xdr_decode_hyper(p, &locku->lu_offset);
 745	p = xdr_decode_hyper(p, &locku->lu_length);
 
 746
 747	DECODE_TAIL;
 748}
 749
 750static __be32
 751nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
 752{
 753	DECODE_HEAD;
 
 
 754
 755	READ_BUF(4);
 756	lookup->lo_len = be32_to_cpup(p++);
 757	READ_BUF(lookup->lo_len);
 758	SAVEMEM(lookup->lo_name, lookup->lo_len);
 759	if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
 760		return status;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 761
 762	DECODE_TAIL;
 763}
 764
 765static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
 766{
 767	__be32 *p;
 768	u32 w;
 769
 770	READ_BUF(4);
 771	w = be32_to_cpup(p++);
 772	*share_access = w & NFS4_SHARE_ACCESS_MASK;
 773	*deleg_want = w & NFS4_SHARE_WANT_MASK;
 774	if (deleg_when)
 775		*deleg_when = w & NFS4_SHARE_WHEN_MASK;
 776
 777	switch (w & NFS4_SHARE_ACCESS_MASK) {
 778	case NFS4_SHARE_ACCESS_READ:
 779	case NFS4_SHARE_ACCESS_WRITE:
 780	case NFS4_SHARE_ACCESS_BOTH:
 781		break;
 782	default:
 783		return nfserr_bad_xdr;
 784	}
 785	w &= ~NFS4_SHARE_ACCESS_MASK;
 786	if (!w)
 787		return nfs_ok;
 788	if (!argp->minorversion)
 789		return nfserr_bad_xdr;
 790	switch (w & NFS4_SHARE_WANT_MASK) {
 791	case NFS4_SHARE_WANT_NO_PREFERENCE:
 792	case NFS4_SHARE_WANT_READ_DELEG:
 793	case NFS4_SHARE_WANT_WRITE_DELEG:
 794	case NFS4_SHARE_WANT_ANY_DELEG:
 795	case NFS4_SHARE_WANT_NO_DELEG:
 796	case NFS4_SHARE_WANT_CANCEL:
 797		break;
 798	default:
 799		return nfserr_bad_xdr;
 800	}
 801	w &= ~NFS4_SHARE_WANT_MASK;
 802	if (!w)
 803		return nfs_ok;
 804
 805	if (!deleg_when)	/* open_downgrade */
 806		return nfserr_inval;
 807	switch (w) {
 808	case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
 809	case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
 810	case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
 811	      NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
 812		return nfs_ok;
 813	}
 814xdr_error:
 815	return nfserr_bad_xdr;
 816}
 817
 818static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
 819{
 820	__be32 *p;
 821
 822	READ_BUF(4);
 823	*x = be32_to_cpup(p++);
 824	/* Note: unlinke access bits, deny bits may be zero. */
 825	if (*x & ~NFS4_SHARE_DENY_BOTH)
 826		return nfserr_bad_xdr;
 827	return nfs_ok;
 828xdr_error:
 829	return nfserr_bad_xdr;
 830}
 831
 832static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
 833{
 834	__be32 *p;
 835
 836	READ_BUF(4);
 837	o->len = be32_to_cpup(p++);
 838
 839	if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
 840		return nfserr_bad_xdr;
 841
 842	READ_BUF(o->len);
 843	SAVEMEM(o->data, o->len);
 844	return nfs_ok;
 845xdr_error:
 846	return nfserr_bad_xdr;
 847}
 848
 849static __be32
 850nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
 
 851{
 852	DECODE_HEAD;
 853	u32 dummy;
 854
 855	memset(open->op_bmval, 0, sizeof(open->op_bmval));
 856	open->op_iattr.ia_valid = 0;
 857	open->op_openowner = NULL;
 858
 859	open->op_xdr_error = 0;
 860	/* seqid, share_access, share_deny, clientid, ownerlen */
 861	READ_BUF(4);
 862	open->op_seqid = be32_to_cpup(p++);
 863	/* decode, yet ignore deleg_when until supported */
 864	status = nfsd4_decode_share_access(argp, &open->op_share_access,
 865					   &open->op_deleg_want, &dummy);
 866	if (status)
 867		goto xdr_error;
 868	status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
 869	if (status)
 870		goto xdr_error;
 871	READ_BUF(sizeof(clientid_t));
 872	COPYMEM(&open->op_clientid, sizeof(clientid_t));
 873	status = nfsd4_decode_opaque(argp, &open->op_owner);
 874	if (status)
 875		goto xdr_error;
 876	READ_BUF(4);
 877	open->op_create = be32_to_cpup(p++);
 878	switch (open->op_create) {
 879	case NFS4_OPEN_NOCREATE:
 880		break;
 881	case NFS4_OPEN_CREATE:
 882		READ_BUF(4);
 883		open->op_createmode = be32_to_cpup(p++);
 884		switch (open->op_createmode) {
 885		case NFS4_CREATE_UNCHECKED:
 886		case NFS4_CREATE_GUARDED:
 887			status = nfsd4_decode_fattr(argp, open->op_bmval,
 888				&open->op_iattr, &open->op_acl, &open->op_label);
 889			if (status)
 890				goto out;
 891			break;
 892		case NFS4_CREATE_EXCLUSIVE:
 893			READ_BUF(NFS4_VERIFIER_SIZE);
 894			COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
 895			break;
 896		case NFS4_CREATE_EXCLUSIVE4_1:
 897			if (argp->minorversion < 1)
 898				goto xdr_error;
 899			READ_BUF(NFS4_VERIFIER_SIZE);
 900			COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
 901			status = nfsd4_decode_fattr(argp, open->op_bmval,
 902				&open->op_iattr, &open->op_acl, &open->op_label);
 903			if (status)
 904				goto out;
 905			break;
 906		default:
 907			goto xdr_error;
 908		}
 909		break;
 910	default:
 911		goto xdr_error;
 912	}
 913
 914	/* open_claim */
 915	READ_BUF(4);
 916	open->op_claim_type = be32_to_cpup(p++);
 917	switch (open->op_claim_type) {
 918	case NFS4_OPEN_CLAIM_NULL:
 919	case NFS4_OPEN_CLAIM_DELEGATE_PREV:
 920		READ_BUF(4);
 921		open->op_fname.len = be32_to_cpup(p++);
 922		READ_BUF(open->op_fname.len);
 923		SAVEMEM(open->op_fname.data, open->op_fname.len);
 924		if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
 925			return status;
 926		break;
 927	case NFS4_OPEN_CLAIM_PREVIOUS:
 928		READ_BUF(4);
 929		open->op_delegate_type = be32_to_cpup(p++);
 930		break;
 931	case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 932		status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
 933		if (status)
 934			return status;
 935		READ_BUF(4);
 936		open->op_fname.len = be32_to_cpup(p++);
 937		READ_BUF(open->op_fname.len);
 938		SAVEMEM(open->op_fname.data, open->op_fname.len);
 939		if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
 940			return status;
 941		break;
 942	case NFS4_OPEN_CLAIM_FH:
 943	case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
 944		if (argp->minorversion < 1)
 945			goto xdr_error;
 946		/* void */
 947		break;
 948	case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
 949		if (argp->minorversion < 1)
 950			goto xdr_error;
 951		status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
 952		if (status)
 953			return status;
 954		break;
 955	default:
 956		goto xdr_error;
 957	}
 958
 959	DECODE_TAIL;
 960}
 961
 962static __be32
 963nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
 964{
 965	DECODE_HEAD;
 
 
 966
 967	if (argp->minorversion >= 1)
 968		return nfserr_notsupp;
 969
 970	status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
 
 
 
 
 971	if (status)
 972		return status;
 973	READ_BUF(4);
 974	open_conf->oc_seqid = be32_to_cpup(p++);
 975
 976	DECODE_TAIL;
 977}
 978
 979static __be32
 980nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
 981{
 982	DECODE_HEAD;
 983		    
 984	status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
 985	if (status)
 986		return status;
 987	READ_BUF(4);
 988	open_down->od_seqid = be32_to_cpup(p++);
 989	status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
 990					   &open_down->od_deleg_want, NULL);
 991	if (status)
 992		return status;
 993	status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
 994	if (status)
 995		return status;
 996	DECODE_TAIL;
 997}
 998
 999static __be32
1000nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
 
1001{
1002	DECODE_HEAD;
 
1003
1004	READ_BUF(4);
1005	putfh->pf_fhlen = be32_to_cpup(p++);
1006	if (putfh->pf_fhlen > NFS4_FHSIZE)
1007		goto xdr_error;
1008	READ_BUF(putfh->pf_fhlen);
1009	SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1010
1011	DECODE_TAIL;
1012}
 
 
 
1013
1014static __be32
1015nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1016{
1017	if (argp->minorversion == 0)
1018		return nfs_ok;
1019	return nfserr_notsupp;
1020}
1021
1022static __be32
1023nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
 
1024{
1025	DECODE_HEAD;
 
1026
1027	status = nfsd4_decode_stateid(argp, &read->rd_stateid);
 
1028	if (status)
1029		return status;
1030	READ_BUF(12);
1031	p = xdr_decode_hyper(p, &read->rd_offset);
1032	read->rd_length = be32_to_cpup(p++);
1033
1034	DECODE_TAIL;
 
 
 
1035}
1036
1037static __be32
1038nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1039{
1040	DECODE_HEAD;
 
1041
1042	READ_BUF(24);
1043	p = xdr_decode_hyper(p, &readdir->rd_cookie);
1044	COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1045	readdir->rd_dircount = be32_to_cpup(p++);
1046	readdir->rd_maxcount = be32_to_cpup(p++);
1047	if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1048		goto out;
 
 
 
1049
1050	DECODE_TAIL;
 
1051}
1052
1053static __be32
1054nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1055{
1056	DECODE_HEAD;
 
1057
1058	READ_BUF(4);
1059	remove->rm_namelen = be32_to_cpup(p++);
1060	READ_BUF(remove->rm_namelen);
1061	SAVEMEM(remove->rm_name, remove->rm_namelen);
1062	if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1063		return status;
 
 
 
 
1064
1065	DECODE_TAIL;
1066}
1067
1068static __be32
1069nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1070{
1071	DECODE_HEAD;
 
1072
1073	READ_BUF(4);
1074	rename->rn_snamelen = be32_to_cpup(p++);
1075	READ_BUF(rename->rn_snamelen);
1076	SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1077	READ_BUF(4);
1078	rename->rn_tnamelen = be32_to_cpup(p++);
1079	READ_BUF(rename->rn_tnamelen);
1080	SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1081	if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1082		return status;
1083	if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1084		return status;
 
 
 
 
 
 
 
1085
1086	DECODE_TAIL;
1087}
1088
1089static __be32
1090nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1091{
1092	DECODE_HEAD;
1093
1094	if (argp->minorversion >= 1)
1095		return nfserr_notsupp;
1096
1097	READ_BUF(sizeof(clientid_t));
1098	COPYMEM(clientid, sizeof(clientid_t));
1099
1100	DECODE_TAIL;
1101}
1102
1103static __be32
1104nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1105		     struct nfsd4_secinfo *secinfo)
1106{
1107	DECODE_HEAD;
 
1108
1109	READ_BUF(4);
1110	secinfo->si_namelen = be32_to_cpup(p++);
1111	READ_BUF(secinfo->si_namelen);
1112	SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1113	status = check_filename(secinfo->si_name, secinfo->si_namelen);
1114	if (status)
1115		return status;
1116	DECODE_TAIL;
1117}
1118
1119static __be32
1120nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1121		     struct nfsd4_secinfo_no_name *sin)
1122{
1123	DECODE_HEAD;
 
 
1124
1125	READ_BUF(4);
1126	sin->sin_style = be32_to_cpup(p++);
1127	DECODE_TAIL;
 
 
 
 
1128}
1129
1130static __be32
1131nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1132{
 
1133	__be32 status;
1134
1135	status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
 
1136	if (status)
1137		return status;
1138	return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1139				  &setattr->sa_acl, &setattr->sa_label);
 
 
1140}
1141
1142static __be32
1143nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1144{
1145	DECODE_HEAD;
 
 
 
1146
1147	if (argp->minorversion >= 1)
1148		return nfserr_notsupp;
1149
1150	READ_BUF(NFS4_VERIFIER_SIZE);
1151	COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1152
1153	status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1154	if (status)
 
 
1155		return nfserr_bad_xdr;
1156	READ_BUF(8);
1157	setclientid->se_callback_prog = be32_to_cpup(p++);
1158	setclientid->se_callback_netid_len = be32_to_cpup(p++);
1159	READ_BUF(setclientid->se_callback_netid_len);
1160	SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1161	READ_BUF(4);
1162	setclientid->se_callback_addr_len = be32_to_cpup(p++);
 
 
1163
1164	READ_BUF(setclientid->se_callback_addr_len);
1165	SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1166	READ_BUF(4);
1167	setclientid->se_callback_ident = be32_to_cpup(p++);
 
 
 
 
 
 
 
1168
1169	DECODE_TAIL;
1170}
1171
1172static __be32
1173nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
 
1174{
1175	DECODE_HEAD;
 
1176
1177	if (argp->minorversion >= 1)
1178		return nfserr_notsupp;
1179
1180	READ_BUF(8 + NFS4_VERIFIER_SIZE);
1181	COPYMEM(&scd_c->sc_clientid, 8);
1182	COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1183
1184	DECODE_TAIL;
1185}
1186
1187/* Also used for NVERIFY */
1188static __be32
1189nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1190{
1191	DECODE_HEAD;
 
1192
1193	if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1194		goto out;
 
 
 
 
1195
1196	/* For convenience's sake, we compare raw xdr'd attributes in
1197	 * nfsd4_proc_verify */
1198
1199	READ_BUF(4);
1200	verify->ve_attrlen = be32_to_cpup(p++);
1201	READ_BUF(verify->ve_attrlen);
1202	SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
 
 
 
 
1203
1204	DECODE_TAIL;
1205}
1206
1207static __be32
1208nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1209{
1210	int avail;
1211	int len;
1212	DECODE_HEAD;
1213
1214	status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1215	if (status)
1216		return status;
1217	READ_BUF(16);
1218	p = xdr_decode_hyper(p, &write->wr_offset);
1219	write->wr_stable_how = be32_to_cpup(p++);
1220	if (write->wr_stable_how > 2)
1221		goto xdr_error;
1222	write->wr_buflen = be32_to_cpup(p++);
1223
1224	/* Sorry .. no magic macros for this.. *
1225	 * READ_BUF(write->wr_buflen);
1226	 * SAVEMEM(write->wr_buf, write->wr_buflen);
1227	 */
1228	avail = (char*)argp->end - (char*)argp->p;
1229	if (avail + argp->pagelen < write->wr_buflen) {
1230		dprintk("NFSD: xdr error (%s:%d)\n",
1231				__FILE__, __LINE__);
1232		goto xdr_error;
1233	}
1234	write->wr_head.iov_base = p;
1235	write->wr_head.iov_len = avail;
1236	write->wr_pagelist = argp->pagelist;
1237
1238	len = XDR_QUADLEN(write->wr_buflen) << 2;
1239	if (len >= avail) {
1240		int pages;
1241
1242		len -= avail;
1243
1244		pages = len >> PAGE_SHIFT;
1245		argp->pagelist += pages;
1246		argp->pagelen -= pages * PAGE_SIZE;
1247		len -= pages * PAGE_SIZE;
1248
1249		argp->p = (__be32 *)page_address(argp->pagelist[0]);
1250		argp->pagelist++;
1251		argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1252	}
1253	argp->p += XDR_QUADLEN(len);
1254
1255	DECODE_TAIL;
 
 
 
1256}
1257
1258static __be32
1259nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
 
1260{
1261	DECODE_HEAD;
 
1262
1263	if (argp->minorversion >= 1)
1264		return nfserr_notsupp;
1265
1266	READ_BUF(12);
1267	COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1268	rlockowner->rl_owner.len = be32_to_cpup(p++);
1269	READ_BUF(rlockowner->rl_owner.len);
1270	READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1271
1272	if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1273		return nfserr_inval;
1274	DECODE_TAIL;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1275}
1276
1277static __be32
1278nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1279			 struct nfsd4_exchange_id *exid)
1280{
1281	int dummy, tmp;
1282	DECODE_HEAD;
 
 
 
 
 
 
 
 
1283
1284	READ_BUF(NFS4_VERIFIER_SIZE);
1285	COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1286
1287	status = nfsd4_decode_opaque(argp, &exid->clname);
 
 
 
 
 
 
 
 
 
 
 
 
1288	if (status)
 
 
 
 
1289		return nfserr_bad_xdr;
 
 
 
 
 
1290
1291	READ_BUF(4);
1292	exid->flags = be32_to_cpup(p++);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1293
1294	/* Ignore state_protect4_a */
1295	READ_BUF(4);
1296	exid->spa_how = be32_to_cpup(p++);
1297	switch (exid->spa_how) {
1298	case SP4_NONE:
1299		break;
1300	case SP4_MACH_CRED:
1301		/* spo_must_enforce */
1302		READ_BUF(4);
1303		dummy = be32_to_cpup(p++);
1304		READ_BUF(dummy * 4);
1305		p += dummy;
1306
1307		/* spo_must_allow */
1308		READ_BUF(4);
1309		dummy = be32_to_cpup(p++);
1310		READ_BUF(dummy * 4);
1311		p += dummy;
1312		break;
1313	case SP4_SSV:
1314		/* ssp_ops */
1315		READ_BUF(4);
1316		dummy = be32_to_cpup(p++);
1317		READ_BUF(dummy * 4);
1318		p += dummy;
1319
1320		READ_BUF(4);
1321		dummy = be32_to_cpup(p++);
1322		READ_BUF(dummy * 4);
1323		p += dummy;
1324
1325		/* ssp_hash_algs<> */
1326		READ_BUF(4);
1327		tmp = be32_to_cpup(p++);
1328		while (tmp--) {
1329			READ_BUF(4);
1330			dummy = be32_to_cpup(p++);
1331			READ_BUF(dummy);
1332			p += XDR_QUADLEN(dummy);
1333		}
1334
1335		/* ssp_encr_algs<> */
1336		READ_BUF(4);
1337		tmp = be32_to_cpup(p++);
1338		while (tmp--) {
1339			READ_BUF(4);
1340			dummy = be32_to_cpup(p++);
1341			READ_BUF(dummy);
1342			p += XDR_QUADLEN(dummy);
1343		}
1344
1345		/* ssp_window and ssp_num_gss_handles */
1346		READ_BUF(8);
1347		dummy = be32_to_cpup(p++);
1348		dummy = be32_to_cpup(p++);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1349		break;
1350	default:
1351		goto xdr_error;
1352	}
1353
1354	/* Ignore Implementation ID */
1355	READ_BUF(4);    /* nfs_impl_id4 array length */
1356	dummy = be32_to_cpup(p++);
1357
1358	if (dummy > 1)
1359		goto xdr_error;
1360
1361	if (dummy == 1) {
1362		/* nii_domain */
1363		READ_BUF(4);
1364		dummy = be32_to_cpup(p++);
1365		READ_BUF(dummy);
1366		p += XDR_QUADLEN(dummy);
1367
1368		/* nii_name */
1369		READ_BUF(4);
1370		dummy = be32_to_cpup(p++);
1371		READ_BUF(dummy);
1372		p += XDR_QUADLEN(dummy);
1373
1374		/* nii_date */
1375		READ_BUF(12);
1376		p += 3;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1377	}
1378	DECODE_TAIL;
 
1379}
1380
1381static __be32
1382nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1383			    struct nfsd4_create_session *sess)
1384{
1385	DECODE_HEAD;
1386	u32 dummy;
1387
1388	READ_BUF(16);
1389	COPYMEM(&sess->clientid, 8);
1390	sess->seqid = be32_to_cpup(p++);
1391	sess->flags = be32_to_cpup(p++);
1392
1393	/* Fore channel attrs */
1394	READ_BUF(28);
1395	dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1396	sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1397	sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1398	sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1399	sess->fore_channel.maxops = be32_to_cpup(p++);
1400	sess->fore_channel.maxreqs = be32_to_cpup(p++);
1401	sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
1402	if (sess->fore_channel.nr_rdma_attrs == 1) {
1403		READ_BUF(4);
1404		sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
1405	} else if (sess->fore_channel.nr_rdma_attrs > 1) {
1406		dprintk("Too many fore channel attr bitmaps!\n");
1407		goto xdr_error;
1408	}
1409
1410	/* Back channel attrs */
1411	READ_BUF(28);
1412	dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1413	sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1414	sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1415	sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1416	sess->back_channel.maxops = be32_to_cpup(p++);
1417	sess->back_channel.maxreqs = be32_to_cpup(p++);
1418	sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
1419	if (sess->back_channel.nr_rdma_attrs == 1) {
1420		READ_BUF(4);
1421		sess->back_channel.rdma_attrs = be32_to_cpup(p++);
1422	} else if (sess->back_channel.nr_rdma_attrs > 1) {
1423		dprintk("Too many back channel attr bitmaps!\n");
1424		goto xdr_error;
1425	}
1426
1427	READ_BUF(4);
1428	sess->callback_prog = be32_to_cpup(p++);
1429	nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1430	DECODE_TAIL;
1431}
1432
1433static __be32
1434nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1435			     struct nfsd4_destroy_session *destroy_session)
1436{
1437	DECODE_HEAD;
1438	READ_BUF(NFS4_MAX_SESSIONID_LEN);
1439	COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1440
1441	DECODE_TAIL;
1442}
1443
1444static __be32
1445nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1446			  struct nfsd4_free_stateid *free_stateid)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1447{
1448	DECODE_HEAD;
 
1449
1450	READ_BUF(sizeof(stateid_t));
1451	free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
1452	COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1453
1454	DECODE_TAIL;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1455}
1456
1457static __be32
1458nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1459		      struct nfsd4_sequence *seq)
1460{
1461	DECODE_HEAD;
 
1462
1463	READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1464	COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
 
 
 
 
1465	seq->seqid = be32_to_cpup(p++);
1466	seq->slotid = be32_to_cpup(p++);
1467	seq->maxslots = be32_to_cpup(p++);
1468	seq->cachethis = be32_to_cpup(p++);
1469
1470	DECODE_TAIL;
 
1471}
1472
1473static __be32
1474nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
 
1475{
1476	int i;
1477	__be32 *p, status;
1478	struct nfsd4_test_stateid_id *stateid;
 
 
1479
1480	READ_BUF(4);
1481	test_stateid->ts_num_ids = ntohl(*p++);
 
1482
1483	INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1484
1485	for (i = 0; i < test_stateid->ts_num_ids; i++) {
1486		stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1487		if (!stateid) {
1488			status = nfserrno(-ENOMEM);
1489			goto out;
1490		}
1491
1492		INIT_LIST_HEAD(&stateid->ts_id_list);
1493		list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1494
1495		status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1496		if (status)
1497			goto out;
1498	}
1499
1500	status = 0;
1501out:
1502	return status;
1503xdr_error:
1504	dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1505	status = nfserr_bad_xdr;
1506	goto out;
 
1507}
1508
1509static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
 
1510{
1511	DECODE_HEAD;
 
 
 
 
1512
1513	READ_BUF(8);
1514	COPYMEM(&dc->clientid, 8);
 
 
 
 
1515
1516	DECODE_TAIL;
 
 
 
 
 
 
 
 
1517}
1518
1519static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
 
1520{
1521	DECODE_HEAD;
 
1522
1523	READ_BUF(4);
1524	rc->rca_one_fs = be32_to_cpup(p++);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1525
1526	DECODE_TAIL;
1527}
1528
1529#ifdef CONFIG_NFSD_PNFS
1530static __be32
1531nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1532		struct nfsd4_getdeviceinfo *gdev)
1533{
1534	DECODE_HEAD;
1535	u32 num, i;
 
 
1536
1537	READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1538	COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1539	gdev->gd_layout_type = be32_to_cpup(p++);
1540	gdev->gd_maxcount = be32_to_cpup(p++);
1541	num = be32_to_cpup(p++);
1542	if (num) {
1543		READ_BUF(4 * num);
1544		gdev->gd_notify_types = be32_to_cpup(p++);
1545		for (i = 1; i < num; i++) {
1546			if (be32_to_cpup(p++)) {
1547				status = nfserr_inval;
1548				goto out;
1549			}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1550		}
1551	}
1552	DECODE_TAIL;
 
 
1553}
1554
1555static __be32
1556nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1557		struct nfsd4_layoutget *lgp)
1558{
1559	DECODE_HEAD;
 
1560
1561	READ_BUF(36);
1562	lgp->lg_signal = be32_to_cpup(p++);
1563	lgp->lg_layout_type = be32_to_cpup(p++);
1564	lgp->lg_seg.iomode = be32_to_cpup(p++);
1565	p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1566	p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1567	p = xdr_decode_hyper(p, &lgp->lg_minlength);
1568
1569	status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1570	if (status)
1571		return status;
 
 
1572
1573	READ_BUF(4);
1574	lgp->lg_maxcount = be32_to_cpup(p++);
1575
1576	DECODE_TAIL;
 
 
 
 
1577}
1578
1579static __be32
1580nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1581		struct nfsd4_layoutcommit *lcp)
1582{
1583	DECODE_HEAD;
1584	u32 timechange;
 
 
 
 
 
 
 
 
 
 
 
 
 
1585
1586	READ_BUF(20);
1587	p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1588	p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1589	lcp->lc_reclaim = be32_to_cpup(p++);
 
1590
1591	status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1592	if (status)
1593		return status;
 
 
 
 
 
 
 
 
 
1594
1595	READ_BUF(4);
1596	lcp->lc_newoffset = be32_to_cpup(p++);
1597	if (lcp->lc_newoffset) {
1598		READ_BUF(8);
1599		p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1600	} else
1601		lcp->lc_last_wr = 0;
1602	READ_BUF(4);
1603	timechange = be32_to_cpup(p++);
1604	if (timechange) {
1605		status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1606		if (status)
1607			return status;
1608	} else {
1609		lcp->lc_mtime.tv_nsec = UTIME_NOW;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1610	}
1611	READ_BUF(8);
1612	lcp->lc_layout_type = be32_to_cpup(p++);
1613
1614	/*
1615	 * Save the layout update in XDR format and let the layout driver deal
1616	 * with it later.
1617	 */
1618	lcp->lc_up_len = be32_to_cpup(p++);
1619	if (lcp->lc_up_len > 0) {
1620		READ_BUF(lcp->lc_up_len);
1621		READMEM(lcp->lc_up_layout, lcp->lc_up_len);
 
 
 
 
 
 
 
 
1622	}
1623
1624	DECODE_TAIL;
 
1625}
1626
 
 
 
 
 
1627static __be32
1628nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1629		struct nfsd4_layoutreturn *lrp)
1630{
1631	DECODE_HEAD;
1632
1633	READ_BUF(16);
1634	lrp->lr_reclaim = be32_to_cpup(p++);
1635	lrp->lr_layout_type = be32_to_cpup(p++);
1636	lrp->lr_seg.iomode = be32_to_cpup(p++);
1637	lrp->lr_return_type = be32_to_cpup(p++);
1638	if (lrp->lr_return_type == RETURN_FILE) {
1639		READ_BUF(16);
1640		p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1641		p = xdr_decode_hyper(p, &lrp->lr_seg.length);
1642
1643		status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1644		if (status)
1645			return status;
 
 
 
 
 
 
 
 
 
 
1646
1647		READ_BUF(4);
1648		lrp->lrf_body_len = be32_to_cpup(p++);
1649		if (lrp->lrf_body_len > 0) {
1650			READ_BUF(lrp->lrf_body_len);
1651			READMEM(lrp->lrf_body, lrp->lrf_body_len);
1652		}
1653	} else {
1654		lrp->lr_seg.offset = 0;
1655		lrp->lr_seg.length = NFS4_MAX_UINT64;
 
 
 
1656	}
 
1657
1658	DECODE_TAIL;
 
 
1659}
1660#endif /* CONFIG_NFSD_PNFS */
1661
 
 
 
 
 
 
1662static __be32
1663nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1664		       struct nfsd4_fallocate *fallocate)
1665{
1666	DECODE_HEAD;
 
 
1667
1668	status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
 
1669	if (status)
1670		return status;
1671
1672	READ_BUF(16);
1673	p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1674	xdr_decode_hyper(p, &fallocate->falloc_length);
1675
1676	DECODE_TAIL;
 
1677}
1678
1679static __be32
1680nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
 
1681{
1682	DECODE_HEAD;
 
 
1683
1684	status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1685	if (status)
1686		return status;
1687	status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
 
 
 
 
 
 
1688	if (status)
1689		return status;
1690
1691	READ_BUF(8 + 8 + 8);
1692	p = xdr_decode_hyper(p, &clone->cl_src_pos);
1693	p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1694	p = xdr_decode_hyper(p, &clone->cl_count);
1695	DECODE_TAIL;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1696}
1697
1698static __be32
1699nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
 
1700{
1701	DECODE_HEAD;
 
1702
1703	status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1704	if (status)
1705		return status;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1706
1707	READ_BUF(8 + 4);
1708	p = xdr_decode_hyper(p, &seek->seek_offset);
1709	seek->seek_whence = be32_to_cpup(p);
1710
1711	DECODE_TAIL;
1712}
1713
1714static __be32
1715nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
 
 
 
 
 
 
 
 
 
1716{
1717	return nfs_ok;
1718}
1719
1720static __be32
1721nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1722{
1723	return nfserr_notsupp;
1724}
1725
1726typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1727
1728static nfsd4_dec nfsd4_dec_ops[] = {
1729	[OP_ACCESS]		= (nfsd4_dec)nfsd4_decode_access,
1730	[OP_CLOSE]		= (nfsd4_dec)nfsd4_decode_close,
1731	[OP_COMMIT]		= (nfsd4_dec)nfsd4_decode_commit,
1732	[OP_CREATE]		= (nfsd4_dec)nfsd4_decode_create,
1733	[OP_DELEGPURGE]		= (nfsd4_dec)nfsd4_decode_notsupp,
1734	[OP_DELEGRETURN]	= (nfsd4_dec)nfsd4_decode_delegreturn,
1735	[OP_GETATTR]		= (nfsd4_dec)nfsd4_decode_getattr,
1736	[OP_GETFH]		= (nfsd4_dec)nfsd4_decode_noop,
1737	[OP_LINK]		= (nfsd4_dec)nfsd4_decode_link,
1738	[OP_LOCK]		= (nfsd4_dec)nfsd4_decode_lock,
1739	[OP_LOCKT]		= (nfsd4_dec)nfsd4_decode_lockt,
1740	[OP_LOCKU]		= (nfsd4_dec)nfsd4_decode_locku,
1741	[OP_LOOKUP]		= (nfsd4_dec)nfsd4_decode_lookup,
1742	[OP_LOOKUPP]		= (nfsd4_dec)nfsd4_decode_noop,
1743	[OP_NVERIFY]		= (nfsd4_dec)nfsd4_decode_verify,
1744	[OP_OPEN]		= (nfsd4_dec)nfsd4_decode_open,
1745	[OP_OPENATTR]		= (nfsd4_dec)nfsd4_decode_notsupp,
1746	[OP_OPEN_CONFIRM]	= (nfsd4_dec)nfsd4_decode_open_confirm,
1747	[OP_OPEN_DOWNGRADE]	= (nfsd4_dec)nfsd4_decode_open_downgrade,
1748	[OP_PUTFH]		= (nfsd4_dec)nfsd4_decode_putfh,
1749	[OP_PUTPUBFH]		= (nfsd4_dec)nfsd4_decode_putpubfh,
1750	[OP_PUTROOTFH]		= (nfsd4_dec)nfsd4_decode_noop,
1751	[OP_READ]		= (nfsd4_dec)nfsd4_decode_read,
1752	[OP_READDIR]		= (nfsd4_dec)nfsd4_decode_readdir,
1753	[OP_READLINK]		= (nfsd4_dec)nfsd4_decode_noop,
1754	[OP_REMOVE]		= (nfsd4_dec)nfsd4_decode_remove,
1755	[OP_RENAME]		= (nfsd4_dec)nfsd4_decode_rename,
1756	[OP_RENEW]		= (nfsd4_dec)nfsd4_decode_renew,
1757	[OP_RESTOREFH]		= (nfsd4_dec)nfsd4_decode_noop,
1758	[OP_SAVEFH]		= (nfsd4_dec)nfsd4_decode_noop,
1759	[OP_SECINFO]		= (nfsd4_dec)nfsd4_decode_secinfo,
1760	[OP_SETATTR]		= (nfsd4_dec)nfsd4_decode_setattr,
1761	[OP_SETCLIENTID]	= (nfsd4_dec)nfsd4_decode_setclientid,
1762	[OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1763	[OP_VERIFY]		= (nfsd4_dec)nfsd4_decode_verify,
1764	[OP_WRITE]		= (nfsd4_dec)nfsd4_decode_write,
1765	[OP_RELEASE_LOCKOWNER]	= (nfsd4_dec)nfsd4_decode_release_lockowner,
1766
1767	/* new operations for NFSv4.1 */
1768	[OP_BACKCHANNEL_CTL]	= (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1769	[OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1770	[OP_EXCHANGE_ID]	= (nfsd4_dec)nfsd4_decode_exchange_id,
1771	[OP_CREATE_SESSION]	= (nfsd4_dec)nfsd4_decode_create_session,
1772	[OP_DESTROY_SESSION]	= (nfsd4_dec)nfsd4_decode_destroy_session,
1773	[OP_FREE_STATEID]	= (nfsd4_dec)nfsd4_decode_free_stateid,
1774	[OP_GET_DIR_DELEGATION]	= (nfsd4_dec)nfsd4_decode_notsupp,
1775#ifdef CONFIG_NFSD_PNFS
1776	[OP_GETDEVICEINFO]	= (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1777	[OP_GETDEVICELIST]	= (nfsd4_dec)nfsd4_decode_notsupp,
1778	[OP_LAYOUTCOMMIT]	= (nfsd4_dec)nfsd4_decode_layoutcommit,
1779	[OP_LAYOUTGET]		= (nfsd4_dec)nfsd4_decode_layoutget,
1780	[OP_LAYOUTRETURN]	= (nfsd4_dec)nfsd4_decode_layoutreturn,
1781#else
1782	[OP_GETDEVICEINFO]	= (nfsd4_dec)nfsd4_decode_notsupp,
1783	[OP_GETDEVICELIST]	= (nfsd4_dec)nfsd4_decode_notsupp,
1784	[OP_LAYOUTCOMMIT]	= (nfsd4_dec)nfsd4_decode_notsupp,
1785	[OP_LAYOUTGET]		= (nfsd4_dec)nfsd4_decode_notsupp,
1786	[OP_LAYOUTRETURN]	= (nfsd4_dec)nfsd4_decode_notsupp,
1787#endif
1788	[OP_SECINFO_NO_NAME]	= (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1789	[OP_SEQUENCE]		= (nfsd4_dec)nfsd4_decode_sequence,
1790	[OP_SET_SSV]		= (nfsd4_dec)nfsd4_decode_notsupp,
1791	[OP_TEST_STATEID]	= (nfsd4_dec)nfsd4_decode_test_stateid,
1792	[OP_WANT_DELEGATION]	= (nfsd4_dec)nfsd4_decode_notsupp,
1793	[OP_DESTROY_CLIENTID]	= (nfsd4_dec)nfsd4_decode_destroy_clientid,
1794	[OP_RECLAIM_COMPLETE]	= (nfsd4_dec)nfsd4_decode_reclaim_complete,
1795
1796	/* new operations for NFSv4.2 */
1797	[OP_ALLOCATE]		= (nfsd4_dec)nfsd4_decode_fallocate,
1798	[OP_COPY]		= (nfsd4_dec)nfsd4_decode_notsupp,
1799	[OP_COPY_NOTIFY]	= (nfsd4_dec)nfsd4_decode_notsupp,
1800	[OP_DEALLOCATE]		= (nfsd4_dec)nfsd4_decode_fallocate,
1801	[OP_IO_ADVISE]		= (nfsd4_dec)nfsd4_decode_notsupp,
1802	[OP_LAYOUTERROR]	= (nfsd4_dec)nfsd4_decode_notsupp,
1803	[OP_LAYOUTSTATS]	= (nfsd4_dec)nfsd4_decode_notsupp,
1804	[OP_OFFLOAD_CANCEL]	= (nfsd4_dec)nfsd4_decode_notsupp,
1805	[OP_OFFLOAD_STATUS]	= (nfsd4_dec)nfsd4_decode_notsupp,
1806	[OP_READ_PLUS]		= (nfsd4_dec)nfsd4_decode_notsupp,
1807	[OP_SEEK]		= (nfsd4_dec)nfsd4_decode_seek,
1808	[OP_WRITE_SAME]		= (nfsd4_dec)nfsd4_decode_notsupp,
1809	[OP_CLONE]		= (nfsd4_dec)nfsd4_decode_clone,
 
 
 
 
 
1810};
1811
1812static inline bool
1813nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1814{
1815	if (op->opnum < FIRST_NFS4_OP)
1816		return false;
1817	else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1818		return false;
1819	else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1820		return false;
1821	else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1822		return false;
1823	return true;
1824}
1825
1826static __be32
1827nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1828{
1829	DECODE_HEAD;
1830	struct nfsd4_op *op;
1831	bool cachethis = false;
1832	int auth_slack= argp->rqstp->rq_auth_slack;
1833	int max_reply = auth_slack + 8; /* opcnt, status */
1834	int readcount = 0;
1835	int readbytes = 0;
 
1836	int i;
1837
1838	READ_BUF(4);
1839	argp->taglen = be32_to_cpup(p++);
1840	READ_BUF(argp->taglen);
1841	SAVEMEM(argp->tag, argp->taglen);
1842	READ_BUF(8);
1843	argp->minorversion = be32_to_cpup(p++);
1844	argp->opcnt = be32_to_cpup(p++);
1845	max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1846
1847	if (argp->taglen > NFSD4_MAX_TAGLEN)
1848		goto xdr_error;
1849	if (argp->opcnt > 100)
1850		goto xdr_error;
 
 
 
 
 
 
 
 
 
1851
1852	if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1853		argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1854		if (!argp->ops) {
1855			argp->ops = argp->iops;
1856			dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1857			goto xdr_error;
1858		}
1859	}
1860
1861	if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1862		argp->opcnt = 0;
1863
1864	for (i = 0; i < argp->opcnt; i++) {
1865		op = &argp->ops[i];
1866		op->replay = NULL;
 
1867
1868		READ_BUF(4);
1869		op->opnum = be32_to_cpup(p++);
1870
1871		if (nfsd4_opnum_in_range(argp, op))
1872			op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1873		else {
 
 
 
 
 
1874			op->opnum = OP_ILLEGAL;
1875			op->status = nfserr_op_illegal;
1876		}
 
1877		/*
1878		 * We'll try to cache the result in the DRC if any one
1879		 * op in the compound wants to be cached:
1880		 */
1881		cachethis |= nfsd4_cache_this_op(op);
1882
1883		if (op->opnum == OP_READ) {
1884			readcount++;
1885			readbytes += nfsd4_max_reply(argp->rqstp, op);
1886		} else
1887			max_reply += nfsd4_max_reply(argp->rqstp, op);
1888		/*
1889		 * OP_LOCK may return a conflicting lock.  (Special case
1890		 * because it will just skip encoding this if it runs
1891		 * out of xdr buffer space, and it is the only operation
1892		 * that behaves this way.)
1893		 */
1894		if (op->opnum == OP_LOCK)
1895			max_reply += NFS4_OPAQUE_LIMIT;
1896
1897		if (op->status) {
1898			argp->opcnt = i+1;
1899			break;
1900		}
1901	}
1902	/* Sessions make the DRC unnecessary: */
1903	if (argp->minorversion)
1904		cachethis = false;
1905	svc_reserve(argp->rqstp, max_reply + readbytes);
1906	argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1907
 
1908	if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
1909		clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
1910
1911	DECODE_TAIL;
1912}
1913
1914static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
 
1915{
1916	if (IS_I_VERSION(inode)) {
1917		p = xdr_encode_hyper(p, inode->i_version);
1918	} else {
1919		*p++ = cpu_to_be32(stat->ctime.tv_sec);
1920		*p++ = cpu_to_be32(stat->ctime.tv_nsec);
1921	}
1922	return p;
1923}
1924
1925static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
 
 
1926{
1927	*p++ = cpu_to_be32(c->atomic);
1928	if (c->change_supported) {
1929		p = xdr_encode_hyper(p, c->before_change);
1930		p = xdr_encode_hyper(p, c->after_change);
1931	} else {
1932		*p++ = cpu_to_be32(c->before_ctime_sec);
1933		*p++ = cpu_to_be32(c->before_ctime_nsec);
1934		*p++ = cpu_to_be32(c->after_ctime_sec);
1935		*p++ = cpu_to_be32(c->after_ctime_nsec);
1936	}
1937	return p;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1938}
1939
1940/* Encode as an array of strings the string given with components
1941 * separated @sep, escaped with esc_enter and esc_exit.
1942 */
1943static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1944					  char *components, char esc_enter,
1945					  char esc_exit)
1946{
1947	__be32 *p;
1948	__be32 pathlen;
1949	int pathlen_offset;
1950	int strlen, count=0;
1951	char *str, *end, *next;
1952
1953	dprintk("nfsd4_encode_components(%s)\n", components);
1954
1955	pathlen_offset = xdr->buf->len;
1956	p = xdr_reserve_space(xdr, 4);
1957	if (!p)
1958		return nfserr_resource;
1959	p++; /* We will fill this in with @count later */
1960
1961	end = str = components;
1962	while (*end) {
1963		bool found_esc = false;
1964
1965		/* try to parse as esc_start, ..., esc_end, sep */
1966		if (*str == esc_enter) {
1967			for (; *end && (*end != esc_exit); end++)
1968				/* find esc_exit or end of string */;
1969			next = end + 1;
1970			if (*end && (!*next || *next == sep)) {
1971				str++;
1972				found_esc = true;
1973			}
1974		}
1975
1976		if (!found_esc)
1977			for (; *end && (*end != sep); end++)
1978				/* find sep or end of string */;
1979
1980		strlen = end - str;
1981		if (strlen) {
1982			p = xdr_reserve_space(xdr, strlen + 4);
1983			if (!p)
1984				return nfserr_resource;
1985			p = xdr_encode_opaque(p, str, strlen);
1986			count++;
1987		}
1988		else
1989			end++;
1990		if (found_esc)
1991			end = next;
1992
1993		str = end;
1994	}
1995	pathlen = htonl(count);
1996	write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
1997	return 0;
1998}
1999
2000/* Encode as an array of strings the string given with components
2001 * separated @sep.
2002 */
2003static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2004				      char *components)
2005{
2006	return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
2007}
2008
2009/*
2010 * encode a location element of a fs_locations structure
2011 */
2012static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2013					struct nfsd4_fs_location *location)
2014{
2015	__be32 status;
2016
2017	status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
2018						'[', ']');
2019	if (status)
2020		return status;
2021	status = nfsd4_encode_components(xdr, '/', location->path);
2022	if (status)
2023		return status;
2024	return 0;
2025}
2026
2027/*
2028 * Encode a path in RFC3530 'pathname4' format
2029 */
2030static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2031				const struct path *root,
2032				const struct path *path)
2033{
2034	struct path cur = *path;
2035	__be32 *p;
2036	struct dentry **components = NULL;
2037	unsigned int ncomponents = 0;
2038	__be32 err = nfserr_jukebox;
2039
2040	dprintk("nfsd4_encode_components(");
2041
2042	path_get(&cur);
2043	/* First walk the path up to the nfsd root, and store the
2044	 * dentries/path components in an array.
2045	 */
2046	for (;;) {
2047		if (path_equal(&cur, root))
2048			break;
2049		if (cur.dentry == cur.mnt->mnt_root) {
2050			if (follow_up(&cur))
2051				continue;
2052			goto out_free;
2053		}
2054		if ((ncomponents & 15) == 0) {
2055			struct dentry **new;
2056			new = krealloc(components,
2057					sizeof(*new) * (ncomponents + 16),
2058					GFP_KERNEL);
2059			if (!new)
2060				goto out_free;
2061			components = new;
2062		}
2063		components[ncomponents++] = cur.dentry;
2064		cur.dentry = dget_parent(cur.dentry);
2065	}
 
2066	err = nfserr_resource;
2067	p = xdr_reserve_space(xdr, 4);
2068	if (!p)
2069		goto out_free;
2070	*p++ = cpu_to_be32(ncomponents);
2071
2072	while (ncomponents) {
2073		struct dentry *dentry = components[ncomponents - 1];
2074		unsigned int len;
2075
2076		spin_lock(&dentry->d_lock);
2077		len = dentry->d_name.len;
2078		p = xdr_reserve_space(xdr, len + 4);
2079		if (!p) {
2080			spin_unlock(&dentry->d_lock);
2081			goto out_free;
2082		}
2083		p = xdr_encode_opaque(p, dentry->d_name.name, len);
2084		dprintk("/%pd", dentry);
2085		spin_unlock(&dentry->d_lock);
2086		dput(dentry);
2087		ncomponents--;
2088	}
2089
2090	err = 0;
2091out_free:
2092	dprintk(")\n");
2093	while (ncomponents)
2094		dput(components[--ncomponents]);
2095	kfree(components);
2096	path_put(&cur);
2097	return err;
2098}
2099
2100static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2101			struct svc_rqst *rqstp, const struct path *path)
 
2102{
 
2103	struct svc_export *exp_ps;
2104	__be32 res;
 
2105
 
2106	exp_ps = rqst_find_fsidzero_export(rqstp);
2107	if (IS_ERR(exp_ps))
2108		return nfserrno(PTR_ERR(exp_ps));
2109	res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
2110	exp_put(exp_ps);
2111	return res;
2112}
2113
2114/*
2115 *  encode a fs_locations structure
2116 */
2117static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2118			struct svc_rqst *rqstp, struct svc_export *exp)
2119{
2120	__be32 status;
2121	int i;
2122	__be32 *p;
2123	struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
2124
2125	status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
2126	if (status)
2127		return status;
2128	p = xdr_reserve_space(xdr, 4);
2129	if (!p)
 
2130		return nfserr_resource;
2131	*p++ = cpu_to_be32(fslocs->locations_count);
2132	for (i=0; i<fslocs->locations_count; i++) {
2133		status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
2134		if (status)
2135			return status;
2136	}
2137	return 0;
2138}
2139
2140static u32 nfs4_file_type(umode_t mode)
2141{
2142	switch (mode & S_IFMT) {
2143	case S_IFIFO:	return NF4FIFO;
2144	case S_IFCHR:	return NF4CHR;
2145	case S_IFDIR:	return NF4DIR;
2146	case S_IFBLK:	return NF4BLK;
2147	case S_IFLNK:	return NF4LNK;
2148	case S_IFREG:	return NF4REG;
2149	case S_IFSOCK:	return NF4SOCK;
2150	default:	return NF4BAD;
2151	};
2152}
2153
2154static inline __be32
2155nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2156		     struct nfs4_ace *ace)
2157{
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2158	if (ace->whotype != NFS4_ACL_WHO_NAMED)
2159		return nfs4_acl_write_who(xdr, ace->whotype);
2160	else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2161		return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
2162	else
2163		return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
2164}
2165
2166static inline __be32
2167nfsd4_encode_layout_type(struct xdr_stream *xdr, enum pnfs_layouttype layout_type)
2168{
2169	__be32 *p;
2170
2171	if (layout_type) {
2172		p = xdr_reserve_space(xdr, 8);
2173		if (!p)
2174			return nfserr_resource;
2175		*p++ = cpu_to_be32(1);
2176		*p++ = cpu_to_be32(layout_type);
2177	} else {
2178		p = xdr_reserve_space(xdr, 4);
2179		if (!p)
2180			return nfserr_resource;
2181		*p++ = cpu_to_be32(0);
2182	}
2183
2184	return 0;
2185}
2186
2187#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2188			      FATTR4_WORD0_RDATTR_ERROR)
2189#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2190#define WORD2_ABSENT_FS_ATTRS 0
2191
2192#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2193static inline __be32
2194nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2195			    void *context, int len)
2196{
2197	__be32 *p;
2198
2199	p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2200	if (!p)
2201		return nfserr_resource;
2202
2203	/*
2204	 * For now we use a 0 here to indicate the null translation; in
2205	 * the future we may place a call to translation code here.
2206	 */
2207	*p++ = cpu_to_be32(0); /* lfs */
2208	*p++ = cpu_to_be32(0); /* pi */
2209	p = xdr_encode_opaque(p, context, len);
2210	return 0;
2211}
2212#else
2213static inline __be32
2214nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2215			    void *context, int len)
2216{ return 0; }
2217#endif
2218
2219static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
2220{
2221	/* As per referral draft:  */
2222	if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2223	    *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2224		if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2225	            *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2226			*rdattr_err = NFSERR_MOVED;
2227		else
2228			return nfserr_moved;
2229	}
2230	*bmval0 &= WORD0_ABSENT_FS_ATTRS;
2231	*bmval1 &= WORD1_ABSENT_FS_ATTRS;
2232	*bmval2 &= WORD2_ABSENT_FS_ATTRS;
2233	return 0;
2234}
2235
2236
2237static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2238{
2239	struct path path = exp->ex_path;
 
2240	int err;
2241
2242	path_get(&path);
2243	while (follow_up(&path)) {
2244		if (path.dentry != path.mnt->mnt_root)
2245			break;
2246	}
2247	err = vfs_getattr(&path, stat);
2248	path_put(&path);
 
 
2249	return err;
2250}
2251
2252static __be32
2253nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2254{
2255	__be32 *p;
2256
2257	if (bmval2) {
2258		p = xdr_reserve_space(xdr, 16);
2259		if (!p)
2260			goto out_resource;
2261		*p++ = cpu_to_be32(3);
2262		*p++ = cpu_to_be32(bmval0);
2263		*p++ = cpu_to_be32(bmval1);
2264		*p++ = cpu_to_be32(bmval2);
2265	} else if (bmval1) {
2266		p = xdr_reserve_space(xdr, 12);
2267		if (!p)
2268			goto out_resource;
2269		*p++ = cpu_to_be32(2);
2270		*p++ = cpu_to_be32(bmval0);
2271		*p++ = cpu_to_be32(bmval1);
2272	} else {
2273		p = xdr_reserve_space(xdr, 8);
2274		if (!p)
2275			goto out_resource;
2276		*p++ = cpu_to_be32(1);
2277		*p++ = cpu_to_be32(bmval0);
2278	}
2279
2280	return 0;
2281out_resource:
2282	return nfserr_resource;
2283}
2284
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2285/*
2286 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2287 * ourselves.
2288 */
2289static __be32
2290nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2291		struct svc_export *exp,
2292		struct dentry *dentry, u32 *bmval,
2293		struct svc_rqst *rqstp, int ignore_crossmnt)
2294{
2295	u32 bmval0 = bmval[0];
2296	u32 bmval1 = bmval[1];
2297	u32 bmval2 = bmval[2];
2298	struct kstat stat;
2299	struct svc_fh *tempfh = NULL;
2300	struct kstatfs statfs;
2301	__be32 *p;
2302	int starting_len = xdr->buf->len;
 
2303	int attrlen_offset;
2304	__be32 attrlen;
2305	u32 dummy;
2306	u64 dummy64;
2307	u32 rdattr_err = 0;
2308	__be32 status;
2309	int err;
2310	struct nfs4_acl *acl = NULL;
2311	void *context = NULL;
2312	int contextlen;
2313	bool contextsupport = false;
2314	struct nfsd4_compoundres *resp = rqstp->rq_resp;
2315	u32 minorversion = resp->cstate.minorversion;
2316	struct path path = {
2317		.mnt	= exp->ex_path.mnt,
2318		.dentry	= dentry,
2319	};
2320	struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
 
 
 
 
 
 
 
 
 
 
 
 
2321
2322	BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2323	BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2324	BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2325	BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
 
 
2326
 
2327	if (exp->ex_fslocs.migrated) {
2328		status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
 
2329		if (status)
2330			goto out;
2331	}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2332
2333	err = vfs_getattr(&path, &stat);
 
2334	if (err)
2335		goto out_nfserr;
2336	if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
 
 
 
 
2337			FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2338	    (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2339		       FATTR4_WORD1_SPACE_TOTAL))) {
2340		err = vfs_statfs(&path, &statfs);
2341		if (err)
2342			goto out_nfserr;
2343	}
2344	if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
 
2345		tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2346		status = nfserr_jukebox;
2347		if (!tempfh)
2348			goto out;
2349		fh_init(tempfh, NFS4_FHSIZE);
2350		status = fh_compose(tempfh, exp, dentry, NULL);
2351		if (status)
2352			goto out;
2353		fhp = tempfh;
2354	}
2355	if (bmval0 & FATTR4_WORD0_ACL) {
2356		err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
 
 
2357		if (err == -EOPNOTSUPP)
2358			bmval0 &= ~FATTR4_WORD0_ACL;
2359		else if (err == -EINVAL) {
2360			status = nfserr_attrnotsupp;
2361			goto out;
2362		} else if (err != 0)
2363			goto out_nfserr;
2364	}
2365
 
 
2366#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2367	if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2368	     bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2369		err = security_inode_getsecctx(d_inode(dentry),
2370						&context, &contextlen);
2371		contextsupport = (err == 0);
2372		if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
 
 
 
2373			if (err == -EOPNOTSUPP)
2374				bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2375			else if (err)
2376				goto out_nfserr;
2377		}
2378	}
2379#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2380
2381	status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
 
 
2382	if (status)
2383		goto out;
2384
 
2385	attrlen_offset = xdr->buf->len;
2386	p = xdr_reserve_space(xdr, 4);
2387	if (!p)
2388		goto out_resource;
2389	p++;                /* to be backfilled later */
2390
2391	if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2392		u32 word0 = nfsd_suppattrs0(minorversion);
2393		u32 word1 = nfsd_suppattrs1(minorversion);
2394		u32 word2 = nfsd_suppattrs2(minorversion);
2395
2396		if (!IS_POSIXACL(dentry->d_inode))
2397			word0 &= ~FATTR4_WORD0_ACL;
2398		if (!contextsupport)
2399			word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2400		if (!word2) {
2401			p = xdr_reserve_space(xdr, 12);
2402			if (!p)
2403				goto out_resource;
2404			*p++ = cpu_to_be32(2);
2405			*p++ = cpu_to_be32(word0);
2406			*p++ = cpu_to_be32(word1);
2407		} else {
2408			p = xdr_reserve_space(xdr, 16);
2409			if (!p)
2410				goto out_resource;
2411			*p++ = cpu_to_be32(3);
2412			*p++ = cpu_to_be32(word0);
2413			*p++ = cpu_to_be32(word1);
2414			*p++ = cpu_to_be32(word2);
2415		}
2416	}
2417	if (bmval0 & FATTR4_WORD0_TYPE) {
2418		p = xdr_reserve_space(xdr, 4);
2419		if (!p)
2420			goto out_resource;
2421		dummy = nfs4_file_type(stat.mode);
2422		if (dummy == NF4BAD) {
2423			status = nfserr_serverfault;
2424			goto out;
2425		}
2426		*p++ = cpu_to_be32(dummy);
2427	}
2428	if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2429		p = xdr_reserve_space(xdr, 4);
2430		if (!p)
2431			goto out_resource;
2432		if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2433			*p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2434		else
2435			*p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2436						NFS4_FH_VOL_RENAME);
2437	}
2438	if (bmval0 & FATTR4_WORD0_CHANGE) {
2439		p = xdr_reserve_space(xdr, 8);
2440		if (!p)
2441			goto out_resource;
2442		p = encode_change(p, &stat, d_inode(dentry));
2443	}
2444	if (bmval0 & FATTR4_WORD0_SIZE) {
2445		p = xdr_reserve_space(xdr, 8);
2446		if (!p)
2447			goto out_resource;
2448		p = xdr_encode_hyper(p, stat.size);
2449	}
2450	if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2451		p = xdr_reserve_space(xdr, 4);
2452		if (!p)
2453			goto out_resource;
2454		*p++ = cpu_to_be32(1);
2455	}
2456	if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2457		p = xdr_reserve_space(xdr, 4);
2458		if (!p)
2459			goto out_resource;
2460		*p++ = cpu_to_be32(1);
2461	}
2462	if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2463		p = xdr_reserve_space(xdr, 4);
2464		if (!p)
2465			goto out_resource;
2466		*p++ = cpu_to_be32(0);
2467	}
2468	if (bmval0 & FATTR4_WORD0_FSID) {
2469		p = xdr_reserve_space(xdr, 16);
2470		if (!p)
2471			goto out_resource;
2472		if (exp->ex_fslocs.migrated) {
2473			p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2474			p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2475		} else switch(fsid_source(fhp)) {
2476		case FSIDSOURCE_FSID:
2477			p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2478			p = xdr_encode_hyper(p, (u64)0);
2479			break;
2480		case FSIDSOURCE_DEV:
2481			*p++ = cpu_to_be32(0);
2482			*p++ = cpu_to_be32(MAJOR(stat.dev));
2483			*p++ = cpu_to_be32(0);
2484			*p++ = cpu_to_be32(MINOR(stat.dev));
2485			break;
2486		case FSIDSOURCE_UUID:
2487			p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2488								EX_UUID_LEN);
2489			break;
2490		}
2491	}
2492	if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2493		p = xdr_reserve_space(xdr, 4);
2494		if (!p)
2495			goto out_resource;
2496		*p++ = cpu_to_be32(0);
2497	}
2498	if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2499		p = xdr_reserve_space(xdr, 4);
2500		if (!p)
2501			goto out_resource;
2502		*p++ = cpu_to_be32(nn->nfsd4_lease);
2503	}
2504	if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2505		p = xdr_reserve_space(xdr, 4);
2506		if (!p)
2507			goto out_resource;
2508		*p++ = cpu_to_be32(rdattr_err);
2509	}
2510	if (bmval0 & FATTR4_WORD0_ACL) {
2511		struct nfs4_ace *ace;
2512
2513		if (acl == NULL) {
2514			p = xdr_reserve_space(xdr, 4);
2515			if (!p)
2516				goto out_resource;
2517
2518			*p++ = cpu_to_be32(0);
2519			goto out_acl;
2520		}
2521		p = xdr_reserve_space(xdr, 4);
2522		if (!p)
2523			goto out_resource;
2524		*p++ = cpu_to_be32(acl->naces);
2525
2526		for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2527			p = xdr_reserve_space(xdr, 4*3);
2528			if (!p)
2529				goto out_resource;
2530			*p++ = cpu_to_be32(ace->type);
2531			*p++ = cpu_to_be32(ace->flag);
2532			*p++ = cpu_to_be32(ace->access_mask &
2533							NFS4_ACE_MASK_ALL);
2534			status = nfsd4_encode_aclname(xdr, rqstp, ace);
2535			if (status)
2536				goto out;
2537		}
2538	}
2539out_acl:
2540	if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2541		p = xdr_reserve_space(xdr, 4);
2542		if (!p)
2543			goto out_resource;
2544		*p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
2545			ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2546	}
2547	if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2548		p = xdr_reserve_space(xdr, 4);
2549		if (!p)
2550			goto out_resource;
2551		*p++ = cpu_to_be32(1);
2552	}
2553	if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2554		p = xdr_reserve_space(xdr, 4);
2555		if (!p)
2556			goto out_resource;
2557		*p++ = cpu_to_be32(0);
2558	}
2559	if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2560		p = xdr_reserve_space(xdr, 4);
2561		if (!p)
2562			goto out_resource;
2563		*p++ = cpu_to_be32(1);
2564	}
2565	if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2566		p = xdr_reserve_space(xdr, 4);
2567		if (!p)
2568			goto out_resource;
2569		*p++ = cpu_to_be32(1);
2570	}
2571	if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2572		p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2573		if (!p)
2574			goto out_resource;
2575		p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2576					fhp->fh_handle.fh_size);
2577	}
2578	if (bmval0 & FATTR4_WORD0_FILEID) {
2579		p = xdr_reserve_space(xdr, 8);
2580		if (!p)
2581			goto out_resource;
2582		p = xdr_encode_hyper(p, stat.ino);
2583	}
2584	if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2585		p = xdr_reserve_space(xdr, 8);
2586		if (!p)
2587			goto out_resource;
2588		p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2589	}
2590	if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2591		p = xdr_reserve_space(xdr, 8);
2592		if (!p)
2593			goto out_resource;
2594		p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2595	}
2596	if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2597		p = xdr_reserve_space(xdr, 8);
2598		if (!p)
2599			goto out_resource;
2600		p = xdr_encode_hyper(p, (u64) statfs.f_files);
2601	}
2602	if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2603		status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
2604		if (status)
2605			goto out;
2606	}
2607	if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2608		p = xdr_reserve_space(xdr, 4);
2609		if (!p)
2610			goto out_resource;
2611		*p++ = cpu_to_be32(1);
2612	}
2613	if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2614		p = xdr_reserve_space(xdr, 8);
2615		if (!p)
2616			goto out_resource;
2617		p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
2618	}
2619	if (bmval0 & FATTR4_WORD0_MAXLINK) {
2620		p = xdr_reserve_space(xdr, 4);
2621		if (!p)
2622			goto out_resource;
2623		*p++ = cpu_to_be32(255);
2624	}
2625	if (bmval0 & FATTR4_WORD0_MAXNAME) {
2626		p = xdr_reserve_space(xdr, 4);
2627		if (!p)
2628			goto out_resource;
2629		*p++ = cpu_to_be32(statfs.f_namelen);
2630	}
2631	if (bmval0 & FATTR4_WORD0_MAXREAD) {
2632		p = xdr_reserve_space(xdr, 8);
2633		if (!p)
2634			goto out_resource;
2635		p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2636	}
2637	if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2638		p = xdr_reserve_space(xdr, 8);
2639		if (!p)
2640			goto out_resource;
2641		p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2642	}
2643	if (bmval1 & FATTR4_WORD1_MODE) {
2644		p = xdr_reserve_space(xdr, 4);
2645		if (!p)
2646			goto out_resource;
2647		*p++ = cpu_to_be32(stat.mode & S_IALLUGO);
2648	}
2649	if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2650		p = xdr_reserve_space(xdr, 4);
2651		if (!p)
2652			goto out_resource;
2653		*p++ = cpu_to_be32(1);
2654	}
2655	if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2656		p = xdr_reserve_space(xdr, 4);
2657		if (!p)
2658			goto out_resource;
2659		*p++ = cpu_to_be32(stat.nlink);
2660	}
2661	if (bmval1 & FATTR4_WORD1_OWNER) {
2662		status = nfsd4_encode_user(xdr, rqstp, stat.uid);
2663		if (status)
2664			goto out;
2665	}
2666	if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2667		status = nfsd4_encode_group(xdr, rqstp, stat.gid);
2668		if (status)
2669			goto out;
2670	}
2671	if (bmval1 & FATTR4_WORD1_RAWDEV) {
2672		p = xdr_reserve_space(xdr, 8);
2673		if (!p)
2674			goto out_resource;
2675		*p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2676		*p++ = cpu_to_be32((u32) MINOR(stat.rdev));
2677	}
2678	if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2679		p = xdr_reserve_space(xdr, 8);
2680		if (!p)
2681			goto out_resource;
2682		dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2683		p = xdr_encode_hyper(p, dummy64);
2684	}
2685	if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2686		p = xdr_reserve_space(xdr, 8);
2687		if (!p)
2688			goto out_resource;
2689		dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2690		p = xdr_encode_hyper(p, dummy64);
2691	}
2692	if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2693		p = xdr_reserve_space(xdr, 8);
2694		if (!p)
2695			goto out_resource;
2696		dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2697		p = xdr_encode_hyper(p, dummy64);
2698	}
2699	if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2700		p = xdr_reserve_space(xdr, 8);
2701		if (!p)
2702			goto out_resource;
2703		dummy64 = (u64)stat.blocks << 9;
2704		p = xdr_encode_hyper(p, dummy64);
2705	}
2706	if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2707		p = xdr_reserve_space(xdr, 12);
2708		if (!p)
2709			goto out_resource;
2710		p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
2711		*p++ = cpu_to_be32(stat.atime.tv_nsec);
2712	}
2713	if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2714		p = xdr_reserve_space(xdr, 12);
2715		if (!p)
2716			goto out_resource;
2717		*p++ = cpu_to_be32(0);
2718		*p++ = cpu_to_be32(1);
2719		*p++ = cpu_to_be32(0);
2720	}
2721	if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2722		p = xdr_reserve_space(xdr, 12);
2723		if (!p)
2724			goto out_resource;
2725		p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
2726		*p++ = cpu_to_be32(stat.ctime.tv_nsec);
2727	}
2728	if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2729		p = xdr_reserve_space(xdr, 12);
2730		if (!p)
2731			goto out_resource;
2732		p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
2733		*p++ = cpu_to_be32(stat.mtime.tv_nsec);
2734	}
2735	if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2736		struct kstat parent_stat;
2737		u64 ino = stat.ino;
2738
2739		p = xdr_reserve_space(xdr, 8);
2740		if (!p)
2741                	goto out_resource;
2742		/*
2743		 * Get parent's attributes if not ignoring crossmount
2744		 * and this is the root of a cross-mounted filesystem.
2745		 */
2746		if (ignore_crossmnt == 0 &&
2747		    dentry == exp->ex_path.mnt->mnt_root) {
2748			err = get_parent_attributes(exp, &parent_stat);
2749			if (err)
2750				goto out_nfserr;
2751			ino = parent_stat.ino;
2752		}
2753		p = xdr_encode_hyper(p, ino);
2754	}
2755#ifdef CONFIG_NFSD_PNFS
2756	if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
2757		status = nfsd4_encode_layout_type(xdr, exp->ex_layout_type);
2758		if (status)
2759			goto out;
2760	}
2761
2762	if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
2763		status = nfsd4_encode_layout_type(xdr, exp->ex_layout_type);
2764		if (status)
2765			goto out;
2766	}
2767
2768	if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2769		p = xdr_reserve_space(xdr, 4);
2770		if (!p)
2771			goto out_resource;
2772		*p++ = cpu_to_be32(stat.blksize);
2773	}
2774#endif /* CONFIG_NFSD_PNFS */
2775	if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2776		status = nfsd4_encode_bitmap(xdr, NFSD_SUPPATTR_EXCLCREAT_WORD0,
2777						  NFSD_SUPPATTR_EXCLCREAT_WORD1,
2778						  NFSD_SUPPATTR_EXCLCREAT_WORD2);
2779		if (status)
2780			goto out;
2781	}
2782
2783	if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2784		status = nfsd4_encode_security_label(xdr, rqstp, context,
2785								contextlen);
2786		if (status)
2787			goto out;
2788	}
2789
2790	attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2791	write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
2792	status = nfs_ok;
2793
2794out:
2795#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2796	if (context)
2797		security_release_secctx(context, contextlen);
2798#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2799	kfree(acl);
2800	if (tempfh) {
2801		fh_put(tempfh);
2802		kfree(tempfh);
2803	}
2804	if (status)
2805		xdr_truncate_encode(xdr, starting_len);
2806	return status;
2807out_nfserr:
2808	status = nfserrno(err);
2809	goto out;
2810out_resource:
2811	status = nfserr_resource;
2812	goto out;
2813}
2814
2815static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2816				struct xdr_buf *buf, __be32 *p, int bytes)
2817{
2818	xdr->scratch.iov_len = 0;
2819	memset(buf, 0, sizeof(struct xdr_buf));
2820	buf->head[0].iov_base = p;
2821	buf->head[0].iov_len = 0;
2822	buf->len = 0;
2823	xdr->buf = buf;
2824	xdr->iov = buf->head;
2825	xdr->p = p;
2826	xdr->end = (void *)p + bytes;
2827	buf->buflen = bytes;
2828}
2829
2830__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2831			struct svc_fh *fhp, struct svc_export *exp,
2832			struct dentry *dentry, u32 *bmval,
2833			struct svc_rqst *rqstp, int ignore_crossmnt)
2834{
2835	struct xdr_buf dummy;
2836	struct xdr_stream xdr;
2837	__be32 ret;
2838
2839	svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
2840	ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2841							ignore_crossmnt);
2842	*p = xdr.p;
2843	return ret;
2844}
2845
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2846static inline int attributes_need_mount(u32 *bmval)
2847{
2848	if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2849		return 1;
2850	if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2851		return 1;
2852	return 0;
2853}
2854
2855static __be32
2856nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2857			const char *name, int namlen)
2858{
2859	struct svc_export *exp = cd->rd_fhp->fh_export;
2860	struct dentry *dentry;
2861	__be32 nfserr;
2862	int ignore_crossmnt = 0;
2863
2864	dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
2865	if (IS_ERR(dentry))
2866		return nfserrno(PTR_ERR(dentry));
2867	if (d_really_is_negative(dentry)) {
2868		/*
2869		 * we're not holding the i_mutex here, so there's
2870		 * a window where this directory entry could have gone
2871		 * away.
2872		 */
2873		dput(dentry);
2874		return nfserr_noent;
2875	}
2876
2877	exp_get(exp);
2878	/*
2879	 * In the case of a mountpoint, the client may be asking for
2880	 * attributes that are only properties of the underlying filesystem
2881	 * as opposed to the cross-mounted file system. In such a case,
2882	 * we will not follow the cross mount and will fill the attribtutes
2883	 * directly from the mountpoint dentry.
2884	 */
2885	if (nfsd_mountpoint(dentry, exp)) {
2886		int err;
2887
2888		if (!(exp->ex_flags & NFSEXP_V4ROOT)
2889				&& !attributes_need_mount(cd->rd_bmval)) {
2890			ignore_crossmnt = 1;
2891			goto out_encode;
2892		}
2893		/*
2894		 * Why the heck aren't we just using nfsd_lookup??
2895		 * Different "."/".." handling?  Something else?
2896		 * At least, add a comment here to explain....
2897		 */
2898		err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2899		if (err) {
2900			nfserr = nfserrno(err);
2901			goto out_put;
2902		}
2903		nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2904		if (nfserr)
2905			goto out_put;
2906
2907	}
2908out_encode:
2909	nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
2910					cd->rd_rqstp, ignore_crossmnt);
2911out_put:
2912	dput(dentry);
2913	exp_put(exp);
2914	return nfserr;
2915}
2916
2917static __be32 *
2918nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
2919{
2920	__be32 *p;
2921
2922	p = xdr_reserve_space(xdr, 20);
2923	if (!p)
2924		return NULL;
2925	*p++ = htonl(2);
2926	*p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2927	*p++ = htonl(0);			 /* bmval1 */
2928
2929	*p++ = htonl(4);     /* attribute length */
2930	*p++ = nfserr;       /* no htonl */
2931	return p;
 
 
 
 
 
 
 
 
2932}
2933
2934static int
2935nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2936		    loff_t offset, u64 ino, unsigned int d_type)
2937{
2938	struct readdir_cd *ccd = ccdv;
2939	struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2940	struct xdr_stream *xdr = cd->xdr;
2941	int start_offset = xdr->buf->len;
2942	int cookie_offset;
2943	u32 name_and_cookie;
2944	int entry_bytes;
2945	__be32 nfserr = nfserr_toosmall;
2946	__be64 wire_offset;
2947	__be32 *p;
2948
2949	/* In nfsv4, "." and ".." never make it onto the wire.. */
2950	if (name && isdotent(name, namlen)) {
2951		cd->common.err = nfs_ok;
2952		return 0;
2953	}
2954
2955	if (cd->cookie_offset) {
2956		wire_offset = cpu_to_be64(offset);
2957		write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2958							&wire_offset, 8);
2959	}
2960
2961	p = xdr_reserve_space(xdr, 4);
2962	if (!p)
2963		goto fail;
2964	*p++ = xdr_one;                             /* mark entry present */
 
2965	cookie_offset = xdr->buf->len;
2966	p = xdr_reserve_space(xdr, 3*4 + namlen);
2967	if (!p)
2968		goto fail;
2969	p = xdr_encode_hyper(p, NFS_OFFSET_MAX);    /* offset of next entry */
2970	p = xdr_encode_array(p, name, namlen);      /* name length & name */
2971
2972	nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
2973	switch (nfserr) {
2974	case nfs_ok:
2975		break;
2976	case nfserr_resource:
2977		nfserr = nfserr_toosmall;
2978		goto fail;
2979	case nfserr_noent:
2980		xdr_truncate_encode(xdr, start_offset);
2981		goto skip_entry;
 
 
 
 
 
 
 
 
 
 
 
2982	default:
2983		/*
2984		 * If the client requested the RDATTR_ERROR attribute,
2985		 * we stuff the error code into this attribute
2986		 * and continue.  If this attribute was not requested,
2987		 * then in accordance with the spec, we fail the
2988		 * entire READDIR operation(!)
2989		 */
2990		if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2991			goto fail;
2992		p = nfsd4_encode_rdattr_error(xdr, nfserr);
2993		if (p == NULL) {
2994			nfserr = nfserr_toosmall;
2995			goto fail;
2996		}
2997	}
2998	nfserr = nfserr_toosmall;
2999	entry_bytes = xdr->buf->len - start_offset;
3000	if (entry_bytes > cd->rd_maxcount)
3001		goto fail;
3002	cd->rd_maxcount -= entry_bytes;
3003	/*
3004	 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3005	 * let's always let through the first entry, at least:
 
3006	 */
3007	if (!cd->rd_dircount)
3008		goto fail;
3009	name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3010	if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3011		goto fail;
3012	cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
 
 
3013
3014	cd->cookie_offset = cookie_offset;
3015skip_entry:
3016	cd->common.err = nfs_ok;
3017	return 0;
3018fail:
3019	xdr_truncate_encode(xdr, start_offset);
3020	cd->common.err = nfserr;
3021	return -EINVAL;
3022}
3023
3024static __be32
3025nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
3026{
3027	__be32 *p;
3028
3029	p = xdr_reserve_space(xdr, sizeof(stateid_t));
3030	if (!p)
3031		return nfserr_resource;
3032	*p++ = cpu_to_be32(sid->si_generation);
3033	p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3034					sizeof(stateid_opaque_t));
3035	return 0;
3036}
3037
3038static __be32
3039nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
3040{
3041	struct xdr_stream *xdr = &resp->xdr;
3042	__be32 *p;
3043
3044	if (!nfserr) {
3045		p = xdr_reserve_space(xdr, 8);
3046		if (!p)
3047			return nfserr_resource;
3048		*p++ = cpu_to_be32(access->ac_supported);
3049		*p++ = cpu_to_be32(access->ac_resp_access);
3050	}
3051	return nfserr;
3052}
3053
3054static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
 
 
3055{
3056	struct xdr_stream *xdr = &resp->xdr;
3057	__be32 *p;
3058
3059	if (!nfserr) {
3060		p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3061		if (!p)
3062			return nfserr_resource;
3063		p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3064						NFS4_MAX_SESSIONID_LEN);
3065		*p++ = cpu_to_be32(bcts->dir);
3066		/* Upshifting from TCP to RDMA is not supported */
3067		*p++ = cpu_to_be32(0);
3068	}
3069	return nfserr;
3070}
3071
3072static __be32
3073nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
 
3074{
3075	struct xdr_stream *xdr = &resp->xdr;
 
 
3076
3077	if (!nfserr)
3078		nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
 
 
 
 
 
3079
3080	return nfserr;
 
 
 
 
 
3081}
3082
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3083
3084static __be32
3085nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
 
3086{
3087	struct xdr_stream *xdr = &resp->xdr;
3088	__be32 *p;
3089
3090	if (!nfserr) {
3091		p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3092		if (!p)
3093			return nfserr_resource;
3094		p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3095						NFS4_VERIFIER_SIZE);
3096	}
3097	return nfserr;
3098}
3099
 
3100static __be32
3101nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
 
3102{
3103	struct xdr_stream *xdr = &resp->xdr;
3104	__be32 *p;
3105
3106	if (!nfserr) {
3107		p = xdr_reserve_space(xdr, 20);
3108		if (!p)
3109			return nfserr_resource;
3110		encode_cinfo(p, &create->cr_cinfo);
3111		nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3112				create->cr_bmval[1], create->cr_bmval[2]);
3113	}
3114	return nfserr;
3115}
3116
3117static __be32
3118nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
 
3119{
3120	struct svc_fh *fhp = getattr->ga_fhp;
3121	struct xdr_stream *xdr = &resp->xdr;
3122
 
 
3123	if (nfserr)
3124		return nfserr;
 
 
 
 
3125
3126	nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3127				    getattr->ga_bmval,
3128				    resp->rqstp, 0);
3129	return nfserr;
 
 
 
 
 
 
 
3130}
3131
3132static __be32
3133nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
 
3134{
3135	struct xdr_stream *xdr = &resp->xdr;
3136	struct svc_fh *fhp = *fhpp;
3137	unsigned int len;
3138	__be32 *p;
3139
3140	if (!nfserr) {
3141		len = fhp->fh_handle.fh_size;
3142		p = xdr_reserve_space(xdr, len + 4);
3143		if (!p)
3144			return nfserr_resource;
3145		p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3146	}
3147	return nfserr;
3148}
3149
3150/*
3151* Including all fields other than the name, a LOCK4denied structure requires
3152*   8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3153*/
3154static __be32
3155nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
 
3156{
3157	struct xdr_netobj *conf = &ld->ld_owner;
3158	__be32 *p;
3159
3160again:
3161	p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
3162	if (!p) {
3163		/*
3164		 * Don't fail to return the result just because we can't
3165		 * return the conflicting open:
3166		 */
3167		if (conf->len) {
3168			kfree(conf->data);
3169			conf->len = 0;
3170			conf->data = NULL;
3171			goto again;
3172		}
3173		return nfserr_resource;
3174	}
3175	p = xdr_encode_hyper(p, ld->ld_start);
3176	p = xdr_encode_hyper(p, ld->ld_length);
3177	*p++ = cpu_to_be32(ld->ld_type);
3178	if (conf->len) {
3179		p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3180		p = xdr_encode_opaque(p, conf->data, conf->len);
3181		kfree(conf->data);
3182	}  else {  /* non - nfsv4 lock in conflict, no clientid nor owner */
3183		p = xdr_encode_hyper(p, (u64)0); /* clientid */
3184		*p++ = cpu_to_be32(0); /* length of owner name */
3185	}
3186	return nfserr_denied;
3187}
3188
3189static __be32
3190nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
 
3191{
3192	struct xdr_stream *xdr = &resp->xdr;
3193
3194	if (!nfserr)
3195		nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
3196	else if (nfserr == nfserr_denied)
3197		nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
 
 
 
 
 
 
 
 
 
 
 
3198
3199	return nfserr;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3200}
3201
3202static __be32
3203nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
 
3204{
3205	struct xdr_stream *xdr = &resp->xdr;
 
 
3206
3207	if (nfserr == nfserr_denied)
3208		nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
 
 
 
 
3209	return nfserr;
3210}
3211
3212static __be32
3213nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
 
3214{
3215	struct xdr_stream *xdr = &resp->xdr;
3216
3217	if (!nfserr)
3218		nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
3219
3220	return nfserr;
 
3221}
3222
3223
3224static __be32
3225nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
 
3226{
3227	struct xdr_stream *xdr = &resp->xdr;
3228	__be32 *p;
3229
3230	if (!nfserr) {
3231		p = xdr_reserve_space(xdr, 20);
3232		if (!p)
3233			return nfserr_resource;
3234		p = encode_cinfo(p, &link->li_cinfo);
3235	}
3236	return nfserr;
3237}
3238
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3239
3240static __be32
3241nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
3242{
3243	struct xdr_stream *xdr = &resp->xdr;
3244	__be32 *p;
3245
3246	if (nfserr)
3247		goto out;
 
 
 
 
 
 
 
 
 
3248
3249	nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3250	if (nfserr)
3251		goto out;
3252	p = xdr_reserve_space(xdr, 24);
3253	if (!p)
3254		return nfserr_resource;
3255	p = encode_cinfo(p, &open->op_cinfo);
3256	*p++ = cpu_to_be32(open->op_rflags);
 
3257
3258	nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3259					open->op_bmval[2]);
3260	if (nfserr)
3261		goto out;
 
3262
3263	p = xdr_reserve_space(xdr, 4);
3264	if (!p)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3265		return nfserr_resource;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3266
3267	*p++ = cpu_to_be32(open->op_delegate_type);
 
 
3268	switch (open->op_delegate_type) {
3269	case NFS4_OPEN_DELEGATE_NONE:
 
3270		break;
3271	case NFS4_OPEN_DELEGATE_READ:
3272		nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3273		if (nfserr)
3274			return nfserr;
3275		p = xdr_reserve_space(xdr, 20);
3276		if (!p)
3277			return nfserr_resource;
3278		*p++ = cpu_to_be32(open->op_recall);
3279
3280		/*
3281		 * TODO: ACE's in delegations
3282		 */
3283		*p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3284		*p++ = cpu_to_be32(0);
3285		*p++ = cpu_to_be32(0);
3286		*p++ = cpu_to_be32(0);   /* XXX: is NULL principal ok? */
3287		break;
3288	case NFS4_OPEN_DELEGATE_WRITE:
3289		nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3290		if (nfserr)
3291			return nfserr;
3292		p = xdr_reserve_space(xdr, 32);
3293		if (!p)
3294			return nfserr_resource;
3295		*p++ = cpu_to_be32(0);
3296
3297		/*
3298		 * TODO: space_limit's in delegations
3299		 */
3300		*p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3301		*p++ = cpu_to_be32(~(u32)0);
3302		*p++ = cpu_to_be32(~(u32)0);
3303
3304		/*
3305		 * TODO: ACE's in delegations
3306		 */
3307		*p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3308		*p++ = cpu_to_be32(0);
3309		*p++ = cpu_to_be32(0);
3310		*p++ = cpu_to_be32(0);   /* XXX: is NULL principal ok? */
3311		break;
3312	case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3313		switch (open->op_why_no_deleg) {
3314		case WND4_CONTENTION:
3315		case WND4_RESOURCE:
3316			p = xdr_reserve_space(xdr, 8);
3317			if (!p)
3318				return nfserr_resource;
3319			*p++ = cpu_to_be32(open->op_why_no_deleg);
3320			/* deleg signaling not supported yet: */
3321			*p++ = cpu_to_be32(0);
3322			break;
3323		default:
3324			p = xdr_reserve_space(xdr, 4);
3325			if (!p)
3326				return nfserr_resource;
3327			*p++ = cpu_to_be32(open->op_why_no_deleg);
3328		}
3329		break;
3330	default:
3331		BUG();
3332	}
3333	/* XXX save filehandle here */
3334out:
3335	return nfserr;
3336}
3337
3338static __be32
3339nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
 
3340{
3341	struct xdr_stream *xdr = &resp->xdr;
3342
3343	if (!nfserr)
3344		nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3345
3346	return nfserr;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3347}
3348
3349static __be32
3350nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
 
3351{
3352	struct xdr_stream *xdr = &resp->xdr;
 
 
 
 
 
3353
3354	if (!nfserr)
3355		nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
 
 
 
 
3356
3357	return nfserr;
 
3358}
3359
 
 
 
 
 
3360static __be32 nfsd4_encode_splice_read(
3361				struct nfsd4_compoundres *resp,
3362				struct nfsd4_read *read,
3363				struct file *file, unsigned long maxcount)
3364{
3365	struct xdr_stream *xdr = &resp->xdr;
3366	struct xdr_buf *buf = xdr->buf;
3367	u32 eof;
3368	long len;
3369	int space_left;
3370	__be32 nfserr;
3371	__be32 *p = xdr->p - 2;
3372
3373	/* Make sure there will be room for padding if needed */
3374	if (xdr->end - xdr->p < 1)
 
 
 
 
3375		return nfserr_resource;
3376
3377	len = maxcount;
3378	nfserr = nfsd_splice_read(read->rd_rqstp, file,
3379				  read->rd_offset, &maxcount);
3380	if (nfserr) {
3381		/*
3382		 * nfsd_splice_actor may have already messed with the
3383		 * page length; reset it so as not to confuse
3384		 * xdr_truncate_encode:
3385		 */
3386		buf->page_len = 0;
3387		return nfserr;
3388	}
3389
3390	eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3391				d_inode(read->rd_fhp->fh_dentry)->i_size);
3392
3393	*(p++) = htonl(eof);
3394	*(p++) = htonl(maxcount);
3395
3396	buf->page_len = maxcount;
3397	buf->len += maxcount;
3398	xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3399							/ PAGE_SIZE;
3400
3401	/* Use rest of head for padding and remaining ops: */
3402	buf->tail[0].iov_base = xdr->p;
3403	buf->tail[0].iov_len = 0;
3404	xdr->iov = buf->tail;
3405	if (maxcount&3) {
3406		int pad = 4 - (maxcount&3);
3407
3408		*(xdr->p++) = 0;
3409
3410		buf->tail[0].iov_base += maxcount&3;
3411		buf->tail[0].iov_len = pad;
3412		buf->len += pad;
3413	}
3414
 
 
 
 
 
 
 
3415	space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3416				buf->buflen - buf->len);
3417	buf->buflen = buf->len + space_left;
3418	xdr->end = (__be32 *)((void *)xdr->end + space_left);
3419
3420	return 0;
 
 
 
 
 
 
 
 
 
3421}
3422
3423static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3424				 struct nfsd4_read *read,
3425				 struct file *file, unsigned long maxcount)
3426{
3427	struct xdr_stream *xdr = &resp->xdr;
3428	u32 eof;
3429	int v;
3430	int starting_len = xdr->buf->len - 8;
3431	long len;
3432	int thislen;
3433	__be32 nfserr;
3434	__be32 tmp;
3435	__be32 *p;
3436	u32 zzz = 0;
3437	int pad;
3438
3439	len = maxcount;
3440	v = 0;
3441
3442	thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
3443	p = xdr_reserve_space(xdr, (thislen+3)&~3);
3444	WARN_ON_ONCE(!p);
3445	resp->rqstp->rq_vec[v].iov_base = p;
3446	resp->rqstp->rq_vec[v].iov_len = thislen;
3447	v++;
3448	len -= thislen;
3449
3450	while (len) {
3451		thislen = min_t(long, len, PAGE_SIZE);
3452		p = xdr_reserve_space(xdr, (thislen+3)&~3);
3453		WARN_ON_ONCE(!p);
3454		resp->rqstp->rq_vec[v].iov_base = p;
3455		resp->rqstp->rq_vec[v].iov_len = thislen;
3456		v++;
3457		len -= thislen;
3458	}
3459	read->rd_vlen = v;
3460
3461	len = maxcount;
3462	nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3463			read->rd_vlen, &maxcount);
3464	if (nfserr)
3465		return nfserr;
3466	xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
3467
3468	eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3469				d_inode(read->rd_fhp->fh_dentry)->i_size);
3470
3471	tmp = htonl(eof);
3472	write_bytes_to_xdr_buf(xdr->buf, starting_len    , &tmp, 4);
3473	tmp = htonl(maxcount);
3474	write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3475
3476	pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3477	write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3478								&zzz, pad);
3479	return 0;
3480
 
 
 
3481}
3482
3483static __be32
3484nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3485		  struct nfsd4_read *read)
3486{
3487	unsigned long maxcount;
3488	struct xdr_stream *xdr = &resp->xdr;
3489	struct file *file = read->rd_filp;
3490	int starting_len = xdr->buf->len;
3491	struct raparms *ra = NULL;
 
 
3492	__be32 *p;
3493
3494	if (nfserr)
3495		goto out;
 
3496
3497	p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3498	if (!p) {
3499		WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
3500		nfserr = nfserr_resource;
3501		goto out;
3502	}
3503	if (resp->xdr.buf->page_len &&
3504	    test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
3505		WARN_ON_ONCE(1);
3506		nfserr = nfserr_resource;
3507		goto out;
3508	}
3509	xdr_commit_encode(xdr);
3510
3511	maxcount = svc_max_payload(resp->rqstp);
3512	maxcount = min_t(unsigned long, maxcount,
3513			 (xdr->buf->buflen - xdr->buf->len));
3514	maxcount = min_t(unsigned long, maxcount, read->rd_length);
3515
3516	if (read->rd_tmp_file)
3517		ra = nfsd_init_raparms(file);
3518
3519	if (file->f_op->splice_read &&
3520	    test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
3521		nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
3522	else
3523		nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
3524
3525	if (ra)
3526		nfsd_put_raparams(file, ra);
3527
3528	if (nfserr)
3529		xdr_truncate_encode(xdr, starting_len);
 
 
3530
3531out:
3532	if (file)
3533		fput(file);
3534	return nfserr;
3535}
3536
3537static __be32
3538nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
 
3539{
3540	int maxcount;
3541	__be32 wire_count;
3542	int zero = 0;
3543	struct xdr_stream *xdr = &resp->xdr;
3544	int length_offset = xdr->buf->len;
3545	__be32 *p;
3546
3547	if (nfserr)
3548		return nfserr;
3549
3550	p = xdr_reserve_space(xdr, 4);
3551	if (!p)
3552		return nfserr_resource;
3553	maxcount = PAGE_SIZE;
3554
3555	p = xdr_reserve_space(xdr, maxcount);
3556	if (!p)
3557		return nfserr_resource;
3558	/*
3559	 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3560	 * if they would overflow the buffer.  Is this kosher in NFSv4?  If
3561	 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3562	 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3563	 */
3564	nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3565						(char *)p, &maxcount);
3566	if (nfserr == nfserr_isdir)
3567		nfserr = nfserr_inval;
3568	if (nfserr) {
3569		xdr_truncate_encode(xdr, length_offset);
3570		return nfserr;
3571	}
 
 
 
 
 
 
 
 
 
3572
3573	wire_count = htonl(maxcount);
3574	write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3575	xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
3576	if (maxcount & 3)
3577		write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3578						&zero, 4 - (maxcount&3));
3579	return 0;
3580}
3581
3582static __be32
3583nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
 
3584{
3585	int maxcount;
3586	int bytes_left;
3587	loff_t offset;
3588	__be64 wire_offset;
3589	struct xdr_stream *xdr = &resp->xdr;
3590	int starting_len = xdr->buf->len;
3591	__be32 *p;
3592
3593	if (nfserr)
3594		return nfserr;
3595
3596	p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3597	if (!p)
3598		return nfserr_resource;
3599
3600	/* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3601	*p++ = cpu_to_be32(0);
3602	*p++ = cpu_to_be32(0);
3603	resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3604				- (char *)resp->xdr.buf->head[0].iov_base;
3605
3606	/*
3607	 * Number of bytes left for directory entries allowing for the
3608	 * final 8 bytes of the readdir and a following failed op:
3609	 */
3610	bytes_left = xdr->buf->buflen - xdr->buf->len
3611			- COMPOUND_ERR_SLACK_SPACE - 8;
3612	if (bytes_left < 0) {
3613		nfserr = nfserr_resource;
3614		goto err_no_verf;
3615	}
3616	maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3617	/*
3618	 * Note the rfc defines rd_maxcount as the size of the
3619	 * READDIR4resok structure, which includes the verifier above
3620	 * and the 8 bytes encoded at the end of this function:
3621	 */
3622	if (maxcount < 16) {
3623		nfserr = nfserr_toosmall;
3624		goto err_no_verf;
3625	}
3626	maxcount = min_t(int, maxcount-16, bytes_left);
3627
3628	/* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3629	if (!readdir->rd_dircount)
3630		readdir->rd_dircount = INT_MAX;
3631
 
3632	readdir->xdr = xdr;
3633	readdir->rd_maxcount = maxcount;
3634	readdir->common.err = 0;
3635	readdir->cookie_offset = 0;
3636
3637	offset = readdir->rd_cookie;
3638	nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3639			      &offset,
3640			      &readdir->common, nfsd4_encode_dirent);
3641	if (nfserr == nfs_ok &&
3642	    readdir->common.err == nfserr_toosmall &&
3643	    xdr->buf->len == starting_len + 8) {
3644		/* nothing encoded; which limit did we hit?: */
3645		if (maxcount - 16 < bytes_left)
3646			/* It was the fault of rd_maxcount: */
3647			nfserr = nfserr_toosmall;
3648		else
3649			/* We ran out of buffer space: */
3650			nfserr = nfserr_resource;
3651	}
3652	if (nfserr)
3653		goto err_no_verf;
 
 
 
3654
3655	if (readdir->cookie_offset) {
3656		wire_offset = cpu_to_be64(offset);
3657		write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3658							&wire_offset, 8);
3659	}
3660
3661	p = xdr_reserve_space(xdr, 8);
3662	if (!p) {
3663		WARN_ON_ONCE(1);
3664		goto err_no_verf;
3665	}
3666	*p++ = 0;	/* no more entries */
3667	*p++ = htonl(readdir->common.err == nfserr_eof);
3668
3669	return 0;
3670err_no_verf:
3671	xdr_truncate_encode(xdr, starting_len);
 
 
 
 
 
 
3672	return nfserr;
3673}
3674
3675static __be32
3676nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
 
3677{
3678	struct xdr_stream *xdr = &resp->xdr;
3679	__be32 *p;
3680
3681	if (!nfserr) {
3682		p = xdr_reserve_space(xdr, 20);
3683		if (!p)
3684			return nfserr_resource;
3685		p = encode_cinfo(p, &remove->rm_cinfo);
3686	}
3687	return nfserr;
3688}
3689
3690static __be32
3691nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
 
3692{
3693	struct xdr_stream *xdr = &resp->xdr;
3694	__be32 *p;
3695
3696	if (!nfserr) {
3697		p = xdr_reserve_space(xdr, 40);
3698		if (!p)
3699			return nfserr_resource;
3700		p = encode_cinfo(p, &rename->rn_sinfo);
3701		p = encode_cinfo(p, &rename->rn_tinfo);
3702	}
3703	return nfserr;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3704}
3705
3706static __be32
3707nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
3708			 __be32 nfserr, struct svc_export *exp)
3709{
3710	u32 i, nflavs, supported;
3711	struct exp_flavor_info *flavs;
3712	struct exp_flavor_info def_flavs[2];
3713	__be32 *p, *flavorsp;
3714	static bool report = true;
 
 
3715
3716	if (nfserr)
3717		goto out;
3718	nfserr = nfserr_resource;
3719	if (exp->ex_nflavors) {
3720		flavs = exp->ex_flavors;
3721		nflavs = exp->ex_nflavors;
3722	} else { /* Handling of some defaults in absence of real secinfo: */
3723		flavs = def_flavs;
3724		if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3725			nflavs = 2;
3726			flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3727			flavs[1].pseudoflavor = RPC_AUTH_NULL;
3728		} else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3729			nflavs = 1;
3730			flavs[0].pseudoflavor
3731					= svcauth_gss_flavor(exp->ex_client);
3732		} else {
3733			nflavs = 1;
3734			flavs[0].pseudoflavor
3735					= exp->ex_client->flavour->flavour;
3736		}
3737	}
3738
3739	supported = 0;
3740	p = xdr_reserve_space(xdr, 4);
3741	if (!p)
3742		goto out;
3743	flavorsp = p++;		/* to be backfilled later */
3744
3745	for (i = 0; i < nflavs; i++) {
3746		rpc_authflavor_t pf = flavs[i].pseudoflavor;
3747		struct rpcsec_gss_info info;
3748
3749		if (rpcauth_get_gssinfo(pf, &info) == 0) {
3750			supported++;
3751			p = xdr_reserve_space(xdr, 4 + 4 +
3752					      XDR_LEN(info.oid.len) + 4 + 4);
3753			if (!p)
3754				goto out;
3755			*p++ = cpu_to_be32(RPC_AUTH_GSS);
3756			p = xdr_encode_opaque(p,  info.oid.data, info.oid.len);
3757			*p++ = cpu_to_be32(info.qop);
3758			*p++ = cpu_to_be32(info.service);
 
3759		} else if (pf < RPC_AUTH_MAXFLAVOR) {
3760			supported++;
3761			p = xdr_reserve_space(xdr, 4);
3762			if (!p)
3763				goto out;
3764			*p++ = cpu_to_be32(pf);
 
3765		} else {
3766			if (report)
3767				pr_warn("NFS: SECINFO: security flavor %u "
3768					"is not supported\n", pf);
3769		}
3770	}
3771
3772	if (nflavs != supported)
3773		report = false;
3774	*flavorsp = htonl(supported);
3775	nfserr = 0;
3776out:
3777	if (exp)
3778		exp_put(exp);
3779	return nfserr;
3780}
3781
3782static __be32
3783nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3784		     struct nfsd4_secinfo *secinfo)
3785{
3786	struct xdr_stream *xdr = &resp->xdr;
 
3787
3788	return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
3789}
3790
3791static __be32
3792nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3793		     struct nfsd4_secinfo_no_name *secinfo)
3794{
3795	struct xdr_stream *xdr = &resp->xdr;
 
3796
3797	return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
3798}
3799
3800/*
3801 * The SETATTR encode routine is special -- it always encodes a bitmap,
3802 * regardless of the error status.
3803 */
3804static __be32
3805nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
 
3806{
3807	struct xdr_stream *xdr = &resp->xdr;
3808	__be32 *p;
3809
3810	p = xdr_reserve_space(xdr, 16);
3811	if (!p)
3812		return nfserr_resource;
3813	if (nfserr) {
3814		*p++ = cpu_to_be32(3);
3815		*p++ = cpu_to_be32(0);
3816		*p++ = cpu_to_be32(0);
3817		*p++ = cpu_to_be32(0);
3818	}
3819	else {
3820		*p++ = cpu_to_be32(3);
3821		*p++ = cpu_to_be32(setattr->sa_bmval[0]);
3822		*p++ = cpu_to_be32(setattr->sa_bmval[1]);
3823		*p++ = cpu_to_be32(setattr->sa_bmval[2]);
3824	}
3825	return nfserr;
3826}
3827
3828static __be32
3829nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
 
3830{
3831	struct xdr_stream *xdr = &resp->xdr;
3832	__be32 *p;
3833
3834	if (!nfserr) {
3835		p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3836		if (!p)
3837			return nfserr_resource;
3838		p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3839		p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3840						NFS4_VERIFIER_SIZE);
3841	}
3842	else if (nfserr == nfserr_clid_inuse) {
3843		p = xdr_reserve_space(xdr, 8);
3844		if (!p)
3845			return nfserr_resource;
3846		*p++ = cpu_to_be32(0);
3847		*p++ = cpu_to_be32(0);
 
 
3848	}
 
3849	return nfserr;
3850}
3851
3852static __be32
3853nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
 
3854{
3855	struct xdr_stream *xdr = &resp->xdr;
3856	__be32 *p;
3857
3858	if (!nfserr) {
3859		p = xdr_reserve_space(xdr, 16);
3860		if (!p)
3861			return nfserr_resource;
3862		*p++ = cpu_to_be32(write->wr_bytes_written);
3863		*p++ = cpu_to_be32(write->wr_how_written);
3864		p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3865							NFS4_VERIFIER_SIZE);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3866	}
3867	return nfserr;
3868}
3869
3870static const u32 nfs4_minimal_spo_must_enforce[2] = {
3871	[1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3872	      1 << (OP_EXCHANGE_ID - 32) |
3873	      1 << (OP_CREATE_SESSION - 32) |
3874	      1 << (OP_DESTROY_SESSION - 32) |
3875	      1 << (OP_DESTROY_CLIENTID - 32)
3876};
 
 
 
 
 
 
3877
3878static __be32
3879nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3880			 struct nfsd4_exchange_id *exid)
3881{
3882	struct xdr_stream *xdr = &resp->xdr;
3883	__be32 *p;
3884	char *major_id;
3885	char *server_scope;
3886	int major_id_sz;
3887	int server_scope_sz;
3888	uint64_t minor_id = 0;
3889
3890	if (nfserr)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3891		return nfserr;
3892
3893	major_id = utsname()->nodename;
3894	major_id_sz = strlen(major_id);
3895	server_scope = utsname()->nodename;
3896	server_scope_sz = strlen(server_scope);
3897
3898	p = xdr_reserve_space(xdr,
3899		8 /* eir_clientid */ +
3900		4 /* eir_sequenceid */ +
3901		4 /* eir_flags */ +
3902		4 /* spr_how */);
3903	if (!p)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3904		return nfserr_resource;
 
 
 
 
3905
3906	p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
3907	*p++ = cpu_to_be32(exid->seqid);
3908	*p++ = cpu_to_be32(exid->flags);
 
 
 
3909
3910	*p++ = cpu_to_be32(exid->spa_how);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3911
3912	switch (exid->spa_how) {
3913	case SP4_NONE:
3914		break;
3915	case SP4_MACH_CRED:
3916		/* spo_must_enforce, spo_must_allow */
3917		p = xdr_reserve_space(xdr, 16);
3918		if (!p)
3919			return nfserr_resource;
3920
3921		/* spo_must_enforce bitmap: */
3922		*p++ = cpu_to_be32(2);
3923		*p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3924		*p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
3925		/* empty spo_must_allow bitmap: */
3926		*p++ = cpu_to_be32(0);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3927
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3928		break;
3929	default:
3930		WARN_ON_ONCE(1);
 
 
 
 
 
 
 
3931	}
 
 
3932
3933	p = xdr_reserve_space(xdr,
3934		8 /* so_minor_id */ +
3935		4 /* so_major_id.len */ +
3936		(XDR_QUADLEN(major_id_sz) * 4) +
3937		4 /* eir_server_scope.len */ +
3938		(XDR_QUADLEN(server_scope_sz) * 4) +
3939		4 /* eir_server_impl_id.count (0) */);
3940	if (!p)
 
 
 
3941		return nfserr_resource;
 
 
 
 
 
 
 
 
 
 
 
 
 
3942
3943	/* The server_owner struct */
3944	p = xdr_encode_hyper(p, minor_id);      /* Minor id */
3945	/* major id */
3946	p = xdr_encode_opaque(p, major_id, major_id_sz);
3947
3948	/* Server scope */
3949	p = xdr_encode_opaque(p, server_scope, server_scope_sz);
 
3950
3951	/* Implementation id */
3952	*p++ = cpu_to_be32(0);	/* zero length nfs_impl_id4 array */
3953	return 0;
 
3954}
3955
3956static __be32
3957nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3958			    struct nfsd4_create_session *sess)
3959{
3960	struct xdr_stream *xdr = &resp->xdr;
3961	__be32 *p;
3962
 
 
3963	if (nfserr)
3964		return nfserr;
 
 
 
3965
3966	p = xdr_reserve_space(xdr, 24);
3967	if (!p)
3968		return nfserr_resource;
3969	p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3970					NFS4_MAX_SESSIONID_LEN);
3971	*p++ = cpu_to_be32(sess->seqid);
3972	*p++ = cpu_to_be32(sess->flags);
3973
3974	p = xdr_reserve_space(xdr, 28);
3975	if (!p)
 
 
 
 
 
 
 
 
 
 
 
3976		return nfserr_resource;
3977	*p++ = cpu_to_be32(0); /* headerpadsz */
3978	*p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3979	*p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3980	*p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3981	*p++ = cpu_to_be32(sess->fore_channel.maxops);
3982	*p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3983	*p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
3984
3985	if (sess->fore_channel.nr_rdma_attrs) {
3986		p = xdr_reserve_space(xdr, 4);
3987		if (!p)
3988			return nfserr_resource;
3989		*p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
3990	}
3991
3992	p = xdr_reserve_space(xdr, 28);
3993	if (!p)
 
 
 
 
 
 
 
 
3994		return nfserr_resource;
3995	*p++ = cpu_to_be32(0); /* headerpadsz */
3996	*p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3997	*p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3998	*p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3999	*p++ = cpu_to_be32(sess->back_channel.maxops);
4000	*p++ = cpu_to_be32(sess->back_channel.maxreqs);
4001	*p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
4002
4003	if (sess->back_channel.nr_rdma_attrs) {
4004		p = xdr_reserve_space(xdr, 4);
4005		if (!p)
4006			return nfserr_resource;
4007		*p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
4008	}
4009	return 0;
 
 
 
 
 
 
 
 
4010}
4011
4012static __be32
4013nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
4014		      struct nfsd4_sequence *seq)
4015{
4016	struct xdr_stream *xdr = &resp->xdr;
4017	__be32 *p;
4018
4019	if (nfserr)
 
 
4020		return nfserr;
 
 
 
 
 
 
4021
4022	p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4023	if (!p)
 
 
 
 
 
 
 
 
4024		return nfserr_resource;
4025	p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4026					NFS4_MAX_SESSIONID_LEN);
4027	*p++ = cpu_to_be32(seq->seqid);
4028	*p++ = cpu_to_be32(seq->slotid);
4029	/* Note slotid's are numbered from zero: */
4030	*p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4031	*p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4032	*p++ = cpu_to_be32(seq->status_flags);
4033
4034	resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
4035	return 0;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4036}
4037
4038static __be32
4039nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
4040			  struct nfsd4_test_stateid *test_stateid)
4041{
4042	struct xdr_stream *xdr = &resp->xdr;
4043	struct nfsd4_test_stateid_id *stateid, *next;
4044	__be32 *p;
4045
4046	if (nfserr)
 
4047		return nfserr;
 
 
4048
4049	p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4050	if (!p)
4051		return nfserr_resource;
4052	*p++ = htonl(test_stateid->ts_num_ids);
4053
4054	list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
4055		*p++ = stateid->ts_id_status;
 
 
 
 
 
 
 
4056	}
4057
4058	return nfserr;
4059}
4060
4061#ifdef CONFIG_NFSD_PNFS
4062static __be32
4063nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4064		struct nfsd4_getdeviceinfo *gdev)
4065{
4066	struct xdr_stream *xdr = &resp->xdr;
4067	const struct nfsd4_layout_ops *ops =
4068		nfsd4_layout_ops[gdev->gd_layout_type];
4069	u32 starting_len = xdr->buf->len, needed_len;
4070	__be32 *p;
4071
4072	dprintk("%s: err %d\n", __func__, nfserr);
 
4073	if (nfserr)
4074		goto out;
 
 
 
 
 
 
 
 
 
4075
4076	nfserr = nfserr_resource;
4077	p = xdr_reserve_space(xdr, 4);
4078	if (!p)
4079		goto out;
 
 
4080
4081	*p++ = cpu_to_be32(gdev->gd_layout_type);
 
 
 
 
 
 
 
 
 
 
 
 
 
4082
4083	/* If maxcount is 0 then just update notifications */
4084	if (gdev->gd_maxcount != 0) {
4085		nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4086		if (nfserr) {
4087			/*
4088			 * We don't bother to burden the layout drivers with
4089			 * enforcing gd_maxcount, just tell the client to
4090			 * come back with a bigger buffer if it's not enough.
4091			 */
4092			if (xdr->buf->len + 4 > gdev->gd_maxcount)
4093				goto toosmall;
4094			goto out;
4095		}
4096	}
4097
4098	nfserr = nfserr_resource;
4099	if (gdev->gd_notify_types) {
4100		p = xdr_reserve_space(xdr, 4 + 4);
4101		if (!p)
4102			goto out;
4103		*p++ = cpu_to_be32(1);			/* bitmap length */
4104		*p++ = cpu_to_be32(gdev->gd_notify_types);
4105	} else {
4106		p = xdr_reserve_space(xdr, 4);
4107		if (!p)
4108			goto out;
4109		*p++ = 0;
4110	}
4111
4112	nfserr = 0;
4113out:
4114	kfree(gdev->gd_device);
4115	dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr));
4116	return nfserr;
4117
4118toosmall:
4119	dprintk("%s: maxcount too small\n", __func__);
4120	needed_len = xdr->buf->len + 4 /* notifications */;
4121	xdr_truncate_encode(xdr, starting_len);
4122	p = xdr_reserve_space(xdr, 4);
4123	if (!p) {
4124		nfserr = nfserr_resource;
4125	} else {
4126		*p++ = cpu_to_be32(needed_len);
4127		nfserr = nfserr_toosmall;
4128	}
4129	goto out;
4130}
4131
4132static __be32
4133nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4134		struct nfsd4_layoutget *lgp)
4135{
4136	struct xdr_stream *xdr = &resp->xdr;
4137	const struct nfsd4_layout_ops *ops =
4138		nfsd4_layout_ops[lgp->lg_layout_type];
 
 
4139	__be32 *p;
4140
4141	dprintk("%s: err %d\n", __func__, nfserr);
4142	if (nfserr)
4143		goto out;
4144
4145	nfserr = nfserr_resource;
4146	p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4147	if (!p)
 
 
 
 
 
4148		goto out;
4149
4150	*p++ = cpu_to_be32(1);	/* we always set return-on-close */
4151	*p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4152	p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4153				    sizeof(stateid_opaque_t));
4154
4155	*p++ = cpu_to_be32(1);	/* we always return a single layout */
4156	p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4157	p = xdr_encode_hyper(p, lgp->lg_seg.length);
4158	*p++ = cpu_to_be32(lgp->lg_seg.iomode);
4159	*p++ = cpu_to_be32(lgp->lg_layout_type);
4160
4161	nfserr = ops->encode_layoutget(xdr, lgp);
4162out:
4163	kfree(lgp->lg_content);
 
4164	return nfserr;
4165}
4166
4167static __be32
4168nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4169			  struct nfsd4_layoutcommit *lcp)
4170{
4171	struct xdr_stream *xdr = &resp->xdr;
4172	__be32 *p;
4173
4174	if (nfserr)
 
 
4175		return nfserr;
 
 
 
4176
4177	p = xdr_reserve_space(xdr, 4);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4178	if (!p)
4179		return nfserr_resource;
4180	*p++ = cpu_to_be32(lcp->lc_size_chg);
4181	if (lcp->lc_size_chg) {
4182		p = xdr_reserve_space(xdr, 8);
 
 
 
 
 
4183		if (!p)
4184			return nfserr_resource;
4185		p = xdr_encode_hyper(p, lcp->lc_newsize);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4186	}
4187
4188	return nfs_ok;
4189}
4190
4191static __be32
4192nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4193		struct nfsd4_layoutreturn *lrp)
4194{
4195	struct xdr_stream *xdr = &resp->xdr;
4196	__be32 *p;
4197
4198	if (nfserr)
4199		return nfserr;
4200
4201	p = xdr_reserve_space(xdr, 4);
4202	if (!p)
4203		return nfserr_resource;
4204	*p++ = cpu_to_be32(lrp->lrs_present);
4205	if (lrp->lrs_present)
4206		return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
4207	return nfs_ok;
 
 
 
 
 
 
 
 
4208}
4209#endif /* CONFIG_NFSD_PNFS */
4210
4211static __be32
4212nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4213		  struct nfsd4_seek *seek)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4214{
 
 
 
 
 
 
 
 
 
4215	__be32 *p;
 
4216
4217	if (nfserr)
4218		return nfserr;
4219
4220	p = xdr_reserve_space(&resp->xdr, 4 + 8);
4221	*p++ = cpu_to_be32(seek->seek_eof);
4222	p = xdr_encode_hyper(p, seek->seek_pos);
4223
4224	return nfserr;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4225}
4226
4227static __be32
4228nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
 
4229{
4230	return nfserr;
 
 
 
4231}
4232
4233typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4234
4235/*
4236 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4237 * since we don't need to filter out obsolete ops as this is
4238 * done in the decoding phase.
4239 */
4240static nfsd4_enc nfsd4_enc_ops[] = {
4241	[OP_ACCESS]		= (nfsd4_enc)nfsd4_encode_access,
4242	[OP_CLOSE]		= (nfsd4_enc)nfsd4_encode_close,
4243	[OP_COMMIT]		= (nfsd4_enc)nfsd4_encode_commit,
4244	[OP_CREATE]		= (nfsd4_enc)nfsd4_encode_create,
4245	[OP_DELEGPURGE]		= (nfsd4_enc)nfsd4_encode_noop,
4246	[OP_DELEGRETURN]	= (nfsd4_enc)nfsd4_encode_noop,
4247	[OP_GETATTR]		= (nfsd4_enc)nfsd4_encode_getattr,
4248	[OP_GETFH]		= (nfsd4_enc)nfsd4_encode_getfh,
4249	[OP_LINK]		= (nfsd4_enc)nfsd4_encode_link,
4250	[OP_LOCK]		= (nfsd4_enc)nfsd4_encode_lock,
4251	[OP_LOCKT]		= (nfsd4_enc)nfsd4_encode_lockt,
4252	[OP_LOCKU]		= (nfsd4_enc)nfsd4_encode_locku,
4253	[OP_LOOKUP]		= (nfsd4_enc)nfsd4_encode_noop,
4254	[OP_LOOKUPP]		= (nfsd4_enc)nfsd4_encode_noop,
4255	[OP_NVERIFY]		= (nfsd4_enc)nfsd4_encode_noop,
4256	[OP_OPEN]		= (nfsd4_enc)nfsd4_encode_open,
4257	[OP_OPENATTR]		= (nfsd4_enc)nfsd4_encode_noop,
4258	[OP_OPEN_CONFIRM]	= (nfsd4_enc)nfsd4_encode_open_confirm,
4259	[OP_OPEN_DOWNGRADE]	= (nfsd4_enc)nfsd4_encode_open_downgrade,
4260	[OP_PUTFH]		= (nfsd4_enc)nfsd4_encode_noop,
4261	[OP_PUTPUBFH]		= (nfsd4_enc)nfsd4_encode_noop,
4262	[OP_PUTROOTFH]		= (nfsd4_enc)nfsd4_encode_noop,
4263	[OP_READ]		= (nfsd4_enc)nfsd4_encode_read,
4264	[OP_READDIR]		= (nfsd4_enc)nfsd4_encode_readdir,
4265	[OP_READLINK]		= (nfsd4_enc)nfsd4_encode_readlink,
4266	[OP_REMOVE]		= (nfsd4_enc)nfsd4_encode_remove,
4267	[OP_RENAME]		= (nfsd4_enc)nfsd4_encode_rename,
4268	[OP_RENEW]		= (nfsd4_enc)nfsd4_encode_noop,
4269	[OP_RESTOREFH]		= (nfsd4_enc)nfsd4_encode_noop,
4270	[OP_SAVEFH]		= (nfsd4_enc)nfsd4_encode_noop,
4271	[OP_SECINFO]		= (nfsd4_enc)nfsd4_encode_secinfo,
4272	[OP_SETATTR]		= (nfsd4_enc)nfsd4_encode_setattr,
4273	[OP_SETCLIENTID]	= (nfsd4_enc)nfsd4_encode_setclientid,
4274	[OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4275	[OP_VERIFY]		= (nfsd4_enc)nfsd4_encode_noop,
4276	[OP_WRITE]		= (nfsd4_enc)nfsd4_encode_write,
4277	[OP_RELEASE_LOCKOWNER]	= (nfsd4_enc)nfsd4_encode_noop,
4278
4279	/* NFSv4.1 operations */
4280	[OP_BACKCHANNEL_CTL]	= (nfsd4_enc)nfsd4_encode_noop,
4281	[OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
4282	[OP_EXCHANGE_ID]	= (nfsd4_enc)nfsd4_encode_exchange_id,
4283	[OP_CREATE_SESSION]	= (nfsd4_enc)nfsd4_encode_create_session,
4284	[OP_DESTROY_SESSION]	= (nfsd4_enc)nfsd4_encode_noop,
4285	[OP_FREE_STATEID]	= (nfsd4_enc)nfsd4_encode_noop,
4286	[OP_GET_DIR_DELEGATION]	= (nfsd4_enc)nfsd4_encode_noop,
4287#ifdef CONFIG_NFSD_PNFS
4288	[OP_GETDEVICEINFO]	= (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4289	[OP_GETDEVICELIST]	= (nfsd4_enc)nfsd4_encode_noop,
4290	[OP_LAYOUTCOMMIT]	= (nfsd4_enc)nfsd4_encode_layoutcommit,
4291	[OP_LAYOUTGET]		= (nfsd4_enc)nfsd4_encode_layoutget,
4292	[OP_LAYOUTRETURN]	= (nfsd4_enc)nfsd4_encode_layoutreturn,
4293#else
4294	[OP_GETDEVICEINFO]	= (nfsd4_enc)nfsd4_encode_noop,
4295	[OP_GETDEVICELIST]	= (nfsd4_enc)nfsd4_encode_noop,
4296	[OP_LAYOUTCOMMIT]	= (nfsd4_enc)nfsd4_encode_noop,
4297	[OP_LAYOUTGET]		= (nfsd4_enc)nfsd4_encode_noop,
4298	[OP_LAYOUTRETURN]	= (nfsd4_enc)nfsd4_encode_noop,
4299#endif
4300	[OP_SECINFO_NO_NAME]	= (nfsd4_enc)nfsd4_encode_secinfo_no_name,
4301	[OP_SEQUENCE]		= (nfsd4_enc)nfsd4_encode_sequence,
4302	[OP_SET_SSV]		= (nfsd4_enc)nfsd4_encode_noop,
4303	[OP_TEST_STATEID]	= (nfsd4_enc)nfsd4_encode_test_stateid,
4304	[OP_WANT_DELEGATION]	= (nfsd4_enc)nfsd4_encode_noop,
4305	[OP_DESTROY_CLIENTID]	= (nfsd4_enc)nfsd4_encode_noop,
4306	[OP_RECLAIM_COMPLETE]	= (nfsd4_enc)nfsd4_encode_noop,
4307
4308	/* NFSv4.2 operations */
4309	[OP_ALLOCATE]		= (nfsd4_enc)nfsd4_encode_noop,
4310	[OP_COPY]		= (nfsd4_enc)nfsd4_encode_noop,
4311	[OP_COPY_NOTIFY]	= (nfsd4_enc)nfsd4_encode_noop,
4312	[OP_DEALLOCATE]		= (nfsd4_enc)nfsd4_encode_noop,
4313	[OP_IO_ADVISE]		= (nfsd4_enc)nfsd4_encode_noop,
4314	[OP_LAYOUTERROR]	= (nfsd4_enc)nfsd4_encode_noop,
4315	[OP_LAYOUTSTATS]	= (nfsd4_enc)nfsd4_encode_noop,
4316	[OP_OFFLOAD_CANCEL]	= (nfsd4_enc)nfsd4_encode_noop,
4317	[OP_OFFLOAD_STATUS]	= (nfsd4_enc)nfsd4_encode_noop,
4318	[OP_READ_PLUS]		= (nfsd4_enc)nfsd4_encode_noop,
4319	[OP_SEEK]		= (nfsd4_enc)nfsd4_encode_seek,
4320	[OP_WRITE_SAME]		= (nfsd4_enc)nfsd4_encode_noop,
4321	[OP_CLONE]		= (nfsd4_enc)nfsd4_encode_noop,
 
 
 
 
 
 
4322};
4323
4324/*
4325 * Calculate whether we still have space to encode repsize bytes.
4326 * There are two considerations:
4327 *     - For NFS versions >=4.1, the size of the reply must stay within
4328 *       session limits
4329 *     - For all NFS versions, we must stay within limited preallocated
4330 *       buffer space.
4331 *
4332 * This is called before the operation is processed, so can only provide
4333 * an upper estimate.  For some nonidempotent operations (such as
4334 * getattr), it's not necessarily a problem if that estimate is wrong,
4335 * as we can fail it after processing without significant side effects.
4336 */
4337__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
4338{
4339	struct xdr_buf *buf = &resp->rqstp->rq_res;
4340	struct nfsd4_slot *slot = resp->cstate.slot;
4341
4342	if (buf->len + respsize <= buf->buflen)
4343		return nfs_ok;
4344	if (!nfsd4_has_session(&resp->cstate))
4345		return nfserr_resource;
4346	if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4347		WARN_ON_ONCE(1);
4348		return nfserr_rep_too_big_to_cache;
4349	}
4350	return nfserr_rep_too_big;
4351}
4352
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4353void
4354nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4355{
4356	struct xdr_stream *xdr = &resp->xdr;
4357	struct nfs4_stateowner *so = resp->cstate.replay_owner;
4358	struct svc_rqst *rqstp = resp->rqstp;
4359	int post_err_offset;
 
4360	nfsd4_enc encoder;
4361	__be32 *p;
4362
4363	p = xdr_reserve_space(xdr, 8);
4364	if (!p) {
4365		WARN_ON_ONCE(1);
4366		return;
4367	}
4368	*p++ = cpu_to_be32(op->opnum);
4369	post_err_offset = xdr->buf->len;
4370
4371	if (op->opnum == OP_ILLEGAL)
4372		goto status;
4373	BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
 
 
 
4374	       !nfsd4_enc_ops[op->opnum]);
4375	encoder = nfsd4_enc_ops[op->opnum];
4376	op->status = encoder(resp, op->status, &op->u);
 
 
4377	xdr_commit_encode(xdr);
4378
4379	/* nfsd4_check_resp_size guarantees enough room for error status */
4380	if (!op->status) {
4381		int space_needed = 0;
4382		if (!nfsd4_last_compound_op(rqstp))
4383			space_needed = COMPOUND_ERR_SLACK_SPACE;
4384		op->status = nfsd4_check_resp_size(resp, space_needed);
4385	}
4386	if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4387		struct nfsd4_slot *slot = resp->cstate.slot;
4388
4389		if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4390			op->status = nfserr_rep_too_big_to_cache;
4391		else
4392			op->status = nfserr_rep_too_big;
4393	}
4394	if (op->status == nfserr_resource ||
4395	    op->status == nfserr_rep_too_big ||
4396	    op->status == nfserr_rep_too_big_to_cache) {
4397		/*
4398		 * The operation may have already been encoded or
4399		 * partially encoded.  No op returns anything additional
4400		 * in the case of one of these three errors, so we can
4401		 * just truncate back to after the status.  But it's a
4402		 * bug if we had to do this on a non-idempotent op:
4403		 */
4404		warn_on_nonidempotent_op(op);
4405		xdr_truncate_encode(xdr, post_err_offset);
4406	}
4407	if (so) {
4408		int len = xdr->buf->len - post_err_offset;
4409
4410		so->so_replay.rp_status = op->status;
4411		so->so_replay.rp_buflen = len;
4412		read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4413						so->so_replay.rp_buf, len);
4414	}
4415status:
4416	/* Note that op->status is already in network byte order: */
4417	write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
 
 
 
 
 
 
 
 
 
 
 
4418}
4419
4420/* 
4421 * Encode the reply stored in the stateowner reply cache 
4422 * 
4423 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4424 * previously sent already encoded operation.
 
4425 */
4426void
4427nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
4428{
4429	__be32 *p;
4430	struct nfs4_replay *rp = op->replay;
4431
4432	BUG_ON(!rp);
4433
4434	p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4435	if (!p) {
4436		WARN_ON_ONCE(1);
4437		return;
4438	}
4439	*p++ = cpu_to_be32(op->opnum);
4440	*p++ = rp->rp_status;  /* already xdr'ed */
4441
4442	p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
4443}
4444
4445int
4446nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
4447{
4448        return xdr_ressize_check(rqstp, p);
4449}
4450
4451int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
4452{
4453	struct svc_rqst *rqstp = rq;
4454	struct nfsd4_compoundargs *args = rqstp->rq_argp;
4455
4456	if (args->ops != args->iops) {
4457		kfree(args->ops);
4458		args->ops = args->iops;
4459	}
4460	kfree(args->tmpp);
4461	args->tmpp = NULL;
4462	while (args->to_free) {
4463		struct svcxdr_tmpbuf *tb = args->to_free;
4464		args->to_free = tb->next;
4465		kfree(tb);
4466	}
4467	return 1;
4468}
4469
4470int
4471nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
4472{
4473	if (rqstp->rq_arg.head[0].iov_len % 4) {
4474		/* client is nuts */
4475		dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4476			__func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4477		return 0;
4478	}
4479	args->p = p;
4480	args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4481	args->pagelist = rqstp->rq_arg.pages;
4482	args->pagelen = rqstp->rq_arg.page_len;
4483	args->tmpp = NULL;
4484	args->to_free = NULL;
 
 
4485	args->ops = args->iops;
4486	args->rqstp = rqstp;
4487
4488	return !nfsd4_decode_compound(args);
4489}
4490
4491int
4492nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
4493{
 
 
 
4494	/*
4495	 * All that remains is to write the tag and operation count...
 
4496	 */
4497	struct xdr_buf *buf = resp->xdr.buf;
4498
4499	WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4500				 buf->tail[0].iov_len);
4501
4502	rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4503
4504	p = resp->tagp;
4505	*p++ = htonl(resp->taglen);
4506	memcpy(p, resp->tag, resp->taglen);
4507	p += XDR_QUADLEN(resp->taglen);
4508	*p++ = htonl(resp->opcnt);
4509
4510	nfsd4_sequence_done(resp);
4511	return 1;
4512}
4513
4514/*
4515 * Local variables:
4516 *  c-basic-offset: 8
4517 * End:
4518 */