nfs4xdr.c 91.6 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42
/*
 *  Server-side XDR for NFSv4
 *
 *  Copyright (c) 2002 The Regents of the University of Michigan.
 *  All rights reserved.
 *
 *  Kendrick Smith <kmsmith@umich.edu>
 *  Andy Adamson   <andros@umich.edu>
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *  3. Neither the name of the University nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * TODO: Neil Brown made the following observation:  We currently
 * initially reserve NFSD_BUFSIZE space on the transmit queue and
 * never release any of that until the request is complete.
 * It would be good to calculate a new maximum response size while
 * decoding the COMPOUND, and call svc_reserve with this number
 * at the end of nfs4svc_decode_compoundargs.
 */

43
#include <linux/slab.h>
L
Linus Torvalds 已提交
44
#include <linux/namei.h>
45
#include <linux/statfs.h>
A
Andy Adamson 已提交
46
#include <linux/utsname.h>
47
#include <linux/pagemap.h>
48
#include <linux/sunrpc/svcauth_gss.h>
49

50 51
#include "idmap.h"
#include "acl.h"
52
#include "xdr4.h"
53
#include "vfs.h"
54
#include "state.h"
55
#include "cache.h"
56
#include "netns.h"
57

58 59 60 61 62
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
#include <linux/security.h>
#endif


L
Linus Torvalds 已提交
63 64
#define NFSDDBG_FACILITY		NFSDDBG_XDR

65 66 67 68 69 70 71 72
/*
 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
 * directory in order to indicate to the client that a filesystem boundary is present
 * We use a fixed fsid for a referral
 */
#define NFS4_REFERRAL_FSID_MAJOR	0x8000000ULL
#define NFS4_REFERRAL_FSID_MINOR	0x8000000ULL

73
static __be32
74
check_filename(char *str, int len)
L
Linus Torvalds 已提交
75 76 77 78 79 80
{
	int i;

	if (len == 0)
		return nfserr_inval;
	if (isdotent(str, len))
81
		return nfserr_badname;
L
Linus Torvalds 已提交
82 83
	for (i = 0; i < len; i++)
		if (str[i] == '/')
84
			return nfserr_badname;
L
Linus Torvalds 已提交
85 86 87 88
	return 0;
}

#define DECODE_HEAD				\
A
Al Viro 已提交
89
	__be32 *p;				\
90
	__be32 status
L
Linus Torvalds 已提交
91 92 93 94 95
#define DECODE_TAIL				\
	status = 0;				\
out:						\
	return status;				\
xdr_error:					\
96 97
	dprintk("NFSD: xdr error (%s:%d)\n",	\
			__FILE__, __LINE__);	\
L
Linus Torvalds 已提交
98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113
	status = nfserr_bad_xdr;		\
	goto out

#define READ32(x)         (x) = ntohl(*p++)
#define READ64(x)         do {			\
	(x) = (u64)ntohl(*p++) << 32;		\
	(x) |= ntohl(*p++);			\
} while (0)
#define READMEM(x,nbytes) do {			\
	x = (char *)p;				\
	p += XDR_QUADLEN(nbytes);		\
} while (0)
#define SAVEMEM(x,nbytes) do {			\
	if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
 		savemem(argp, p, nbytes) :	\
 		(char *)p)) {			\
114 115
		dprintk("NFSD: xdr error (%s:%d)\n", \
				__FILE__, __LINE__); \
L
Linus Torvalds 已提交
116 117 118 119 120 121 122 123 124 125 126 127 128 129 130
		goto xdr_error;			\
		}				\
	p += XDR_QUADLEN(nbytes);		\
} while (0)
#define COPYMEM(x,nbytes) do {			\
	memcpy((x), p, nbytes);			\
	p += XDR_QUADLEN(nbytes);		\
} while (0)

/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
#define READ_BUF(nbytes)  do {			\
	if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) {	\
		p = argp->p;			\
		argp->p += XDR_QUADLEN(nbytes);	\
	} else if (!(p = read_buf(argp, nbytes))) { \
131 132
		dprintk("NFSD: xdr error (%s:%d)\n", \
				__FILE__, __LINE__); \
L
Linus Torvalds 已提交
133 134 135 136
		goto xdr_error;			\
	}					\
} while (0)

J
J. Bruce Fields 已提交
137 138 139
static void next_decode_page(struct nfsd4_compoundargs *argp)
{
	argp->p = page_address(argp->pagelist[0]);
140
	argp->pagelist++;
J
J. Bruce Fields 已提交
141 142 143 144 145 146 147 148 149
	if (argp->pagelen < PAGE_SIZE) {
		argp->end = argp->p + (argp->pagelen>>2);
		argp->pagelen = 0;
	} else {
		argp->end = argp->p + (PAGE_SIZE>>2);
		argp->pagelen -= PAGE_SIZE;
	}
}

150
static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
L
Linus Torvalds 已提交
151 152 153 154
{
	/* We want more bytes than seem to be available.
	 * Maybe we need a new page, maybe we have just run out
	 */
155
	unsigned int avail = (char *)argp->end - (char *)argp->p;
A
Al Viro 已提交
156
	__be32 *p;
L
Linus Torvalds 已提交
157 158 159 160 161 162 163 164
	if (avail + argp->pagelen < nbytes)
		return NULL;
	if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
		return NULL;
	/* ok, we can do it with the current plus the next page */
	if (nbytes <= sizeof(argp->tmp))
		p = argp->tmp;
	else {
J
Jesper Juhl 已提交
165
		kfree(argp->tmpp);
L
Linus Torvalds 已提交
166 167 168 169 170
		p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
		if (!p)
			return NULL;
		
	}
171 172 173 174 175
	/*
	 * The following memcpy is safe because read_buf is always
	 * called with nbytes > avail, and the two cases above both
	 * guarantee p points to at least nbytes bytes.
	 */
L
Linus Torvalds 已提交
176
	memcpy(p, argp->p, avail);
J
J. Bruce Fields 已提交
177
	next_decode_page(argp);
L
Linus Torvalds 已提交
178 179 180 181 182
	memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
	argp->p += XDR_QUADLEN(nbytes - avail);
	return p;
}

A
Andy Adamson 已提交
183 184 185 186 187
static int zero_clientid(clientid_t *clid)
{
	return (clid->cl_boot == 0) && (clid->cl_id == 0);
}

188 189 190 191 192 193 194 195 196
/**
 * defer_free - mark an allocation as deferred freed
 * @argp: NFSv4 compound argument structure to be freed with
 * @release: release callback to free @p, typically kfree()
 * @p: pointer to be freed
 *
 * Marks @p to be freed when processing the compound operation
 * described in @argp finishes.
 */
L
Linus Torvalds 已提交
197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212
static int
defer_free(struct nfsd4_compoundargs *argp,
		void (*release)(const void *), void *p)
{
	struct tmpbuf *tb;

	tb = kmalloc(sizeof(*tb), GFP_KERNEL);
	if (!tb)
		return -ENOMEM;
	tb->buf = p;
	tb->release = release;
	tb->next = argp->to_free;
	argp->to_free = tb;
	return 0;
}

213 214 215 216 217 218 219 220 221 222
/**
 * savemem - duplicate a chunk of memory for later processing
 * @argp: NFSv4 compound argument structure to be freed with
 * @p: pointer to be duplicated
 * @nbytes: length to be duplicated
 *
 * Returns a pointer to a copy of @nbytes bytes of memory at @p
 * that are preserved until processing of the NFSv4 compound
 * operation described by @argp finishes.
 */
A
Al Viro 已提交
223
static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
L
Linus Torvalds 已提交
224 225
{
	if (p == argp->tmp) {
226
		p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
227 228
		if (!p)
			return NULL;
L
Linus Torvalds 已提交
229
	} else {
E
Eric Sesterhenn 已提交
230
		BUG_ON(p != argp->tmpp);
L
Linus Torvalds 已提交
231 232 233
		argp->tmpp = NULL;
	}
	if (defer_free(argp, kfree, p)) {
234
		kfree(p);
L
Linus Torvalds 已提交
235 236 237 238 239
		return NULL;
	} else
		return (char *)p;
}

240
static __be32
L
Linus Torvalds 已提交
241 242 243 244 245 246 247
nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
{
	u32 bmlen;
	DECODE_HEAD;

	bmval[0] = 0;
	bmval[1] = 0;
248
	bmval[2] = 0;
L
Linus Torvalds 已提交
249 250 251 252 253 254 255 256 257 258 259

	READ_BUF(4);
	READ32(bmlen);
	if (bmlen > 1000)
		goto xdr_error;

	READ_BUF(bmlen << 2);
	if (bmlen > 0)
		READ32(bmval[0]);
	if (bmlen > 1)
		READ32(bmval[1]);
260 261
	if (bmlen > 2)
		READ32(bmval[2]);
L
Linus Torvalds 已提交
262 263 264 265

	DECODE_TAIL;
}

266
static __be32
267
nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
268 269
		   struct iattr *iattr, struct nfs4_acl **acl,
		   struct xdr_netobj *label)
L
Linus Torvalds 已提交
270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289
{
	int expected_len, len = 0;
	u32 dummy32;
	char *buf;

	DECODE_HEAD;
	iattr->ia_valid = 0;
	if ((status = nfsd4_decode_bitmap(argp, bmval)))
		return status;

	READ_BUF(4);
	READ32(expected_len);

	if (bmval[0] & FATTR4_WORD0_SIZE) {
		READ_BUF(8);
		len += 8;
		READ64(iattr->ia_size);
		iattr->ia_valid |= ATTR_SIZE;
	}
	if (bmval[0] & FATTR4_WORD0_ACL) {
290
		u32 nace;
291
		struct nfs4_ace *ace;
L
Linus Torvalds 已提交
292 293 294 295

		READ_BUF(4); len += 4;
		READ32(nace);

296 297 298 299
		if (nace > NFS4_ACL_MAX)
			return nfserr_resource;

		*acl = nfs4_acl_new(nace);
300 301 302
		if (*acl == NULL)
			return nfserr_jukebox;

303
		defer_free(argp, kfree, *acl);
L
Linus Torvalds 已提交
304

305 306
		(*acl)->naces = nace;
		for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
L
Linus Torvalds 已提交
307
			READ_BUF(16); len += 16;
308 309 310
			READ32(ace->type);
			READ32(ace->flag);
			READ32(ace->access_mask);
L
Linus Torvalds 已提交
311 312 313 314
			READ32(dummy32);
			READ_BUF(dummy32);
			len += XDR_QUADLEN(dummy32) << 2;
			READMEM(buf, dummy32);
315
			ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
316
			status = nfs_ok;
317
			if (ace->whotype != NFS4_ACL_WHO_NAMED)
318
				;
319
			else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
320
				status = nfsd_map_name_to_gid(argp->rqstp,
321
						buf, dummy32, &ace->who_gid);
L
Linus Torvalds 已提交
322
			else
323
				status = nfsd_map_name_to_uid(argp->rqstp,
324
						buf, dummy32, &ace->who_uid);
325 326
			if (status)
				return status;
L
Linus Torvalds 已提交
327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343
		}
	} else
		*acl = NULL;
	if (bmval[1] & FATTR4_WORD1_MODE) {
		READ_BUF(4);
		len += 4;
		READ32(iattr->ia_mode);
		iattr->ia_mode &= (S_IFMT | S_IALLUGO);
		iattr->ia_valid |= ATTR_MODE;
	}
	if (bmval[1] & FATTR4_WORD1_OWNER) {
		READ_BUF(4);
		len += 4;
		READ32(dummy32);
		READ_BUF(dummy32);
		len += (XDR_QUADLEN(dummy32) << 2);
		READMEM(buf, dummy32);
344 345
		if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
			return status;
L
Linus Torvalds 已提交
346 347 348 349 350 351 352 353 354
		iattr->ia_valid |= ATTR_UID;
	}
	if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
		READ_BUF(4);
		len += 4;
		READ32(dummy32);
		READ_BUF(dummy32);
		len += (XDR_QUADLEN(dummy32) << 2);
		READMEM(buf, dummy32);
355 356
		if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
			return status;
L
Linus Torvalds 已提交
357 358 359 360 361 362 363 364 365 366 367 368
		iattr->ia_valid |= ATTR_GID;
	}
	if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
		READ_BUF(4);
		len += 4;
		READ32(dummy32);
		switch (dummy32) {
		case NFS4_SET_TO_CLIENT_TIME:
			/* We require the high 32 bits of 'seconds' to be 0, and we ignore
			   all 32 bits of 'nseconds'. */
			READ_BUF(12);
			len += 12;
369
			READ64(iattr->ia_atime.tv_sec);
L
Linus Torvalds 已提交
370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391
			READ32(iattr->ia_atime.tv_nsec);
			if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
				return nfserr_inval;
			iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
			break;
		case NFS4_SET_TO_SERVER_TIME:
			iattr->ia_valid |= ATTR_ATIME;
			break;
		default:
			goto xdr_error;
		}
	}
	if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
		READ_BUF(4);
		len += 4;
		READ32(dummy32);
		switch (dummy32) {
		case NFS4_SET_TO_CLIENT_TIME:
			/* We require the high 32 bits of 'seconds' to be 0, and we ignore
			   all 32 bits of 'nseconds'. */
			READ_BUF(12);
			len += 12;
392
			READ64(iattr->ia_mtime.tv_sec);
L
Linus Torvalds 已提交
393 394 395 396 397 398 399 400 401 402 403 404
			READ32(iattr->ia_mtime.tv_nsec);
			if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
				return nfserr_inval;
			iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
			break;
		case NFS4_SET_TO_SERVER_TIME:
			iattr->ia_valid |= ATTR_MTIME;
			break;
		default:
			goto xdr_error;
		}
	}
405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425

	label->len = 0;
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
	if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
		READ_BUF(4);
		len += 4;
		READ32(dummy32); /* lfs: we don't use it */
		READ_BUF(4);
		len += 4;
		READ32(dummy32); /* pi: we don't use it either */
		READ_BUF(4);
		len += 4;
		READ32(dummy32);
		READ_BUF(dummy32);
		if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
			return nfserr_badlabel;
		len += (XDR_QUADLEN(dummy32) << 2);
		READMEM(buf, dummy32);
		label->data = kzalloc(dummy32 + 1, GFP_KERNEL);
		if (!label->data)
			return nfserr_jukebox;
426
		label->len = dummy32;
427 428 429 430 431
		defer_free(argp, kfree, label->data);
		memcpy(label->data, buf, dummy32);
	}
#endif

432 433 434 435 436
	if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
	    || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
	    || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
		READ_BUF(expected_len - len);
	else if (len != expected_len)
L
Linus Torvalds 已提交
437 438 439 440 441
		goto xdr_error;

	DECODE_TAIL;
}

442 443 444 445 446 447 448 449 450 451 452 453
static __be32
nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
{
	DECODE_HEAD;

	READ_BUF(sizeof(stateid_t));
	READ32(sid->si_generation);
	COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));

	DECODE_TAIL;
}

454
static __be32
L
Linus Torvalds 已提交
455 456 457 458 459 460 461 462 463 464
nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
{
	DECODE_HEAD;

	READ_BUF(4);
	READ32(access->ac_req_access);

	DECODE_TAIL;
}

465 466 467
static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
{
	DECODE_HEAD;
468
	u32 dummy, uid, gid;
469 470 471 472 473 474 475
	char *machine_name;
	int i;
	int nr_secflavs;

	/* callback_sec_params4 */
	READ_BUF(4);
	READ32(nr_secflavs);
476 477 478 479 480
	if (nr_secflavs)
		cbs->flavor = (u32)(-1);
	else
		/* Is this legal? Be generous, take it to mean AUTH_NONE: */
		cbs->flavor = 0;
481 482 483 484 485 486
	for (i = 0; i < nr_secflavs; ++i) {
		READ_BUF(4);
		READ32(dummy);
		switch (dummy) {
		case RPC_AUTH_NULL:
			/* Nothing to read */
487 488
			if (cbs->flavor == (u32)(-1))
				cbs->flavor = RPC_AUTH_NULL;
489 490 491 492 493 494 495 496 497 498 499 500 501
			break;
		case RPC_AUTH_UNIX:
			READ_BUF(8);
			/* stamp */
			READ32(dummy);

			/* machine name */
			READ32(dummy);
			READ_BUF(dummy);
			SAVEMEM(machine_name, dummy);

			/* uid, gid */
			READ_BUF(8);
502 503
			READ32(uid);
			READ32(gid);
504 505 506 507 508

			/* more gids */
			READ_BUF(4);
			READ32(dummy);
			READ_BUF(dummy * 4);
509
			if (cbs->flavor == (u32)(-1)) {
510 511 512 513 514 515 516 517 518 519
				kuid_t kuid = make_kuid(&init_user_ns, uid);
				kgid_t kgid = make_kgid(&init_user_ns, gid);
				if (uid_valid(kuid) && gid_valid(kgid)) {
					cbs->uid = kuid;
					cbs->gid = kgid;
					cbs->flavor = RPC_AUTH_UNIX;
				} else {
					dprintk("RPC_AUTH_UNIX with invalid"
						"uid or gid ignoring!\n");
				}
520
			}
521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544
			break;
		case RPC_AUTH_GSS:
			dprintk("RPC_AUTH_GSS callback secflavor "
				"not supported!\n");
			READ_BUF(8);
			/* gcbp_service */
			READ32(dummy);
			/* gcbp_handle_from_server */
			READ32(dummy);
			READ_BUF(dummy);
			p += XDR_QUADLEN(dummy);
			/* gcbp_handle_from_client */
			READ_BUF(4);
			READ32(dummy);
			READ_BUF(dummy);
			break;
		default:
			dprintk("Illegal callback secflavor\n");
			return nfserr_inval;
		}
	}
	DECODE_TAIL;
}

545 546 547 548 549 550 551 552 553 554 555
static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
{
	DECODE_HEAD;

	READ_BUF(4);
	READ32(bc->bc_cb_program);
	nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);

	DECODE_TAIL;
}

556 557 558 559 560 561 562
static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
{
	DECODE_HEAD;

	READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
	COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
	READ32(bcts->dir);
563 564
	/* XXX: skipping ctsa_use_conn_in_rdma_mode.  Perhaps Tom Tucker
	 * could help us figure out we should be using it. */
565 566 567
	DECODE_TAIL;
}

568
static __be32
L
Linus Torvalds 已提交
569 570 571 572
nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
{
	DECODE_HEAD;

573
	READ_BUF(4);
L
Linus Torvalds 已提交
574
	READ32(close->cl_seqid);
575
	return nfsd4_decode_stateid(argp, &close->cl_stateid);
L
Linus Torvalds 已提交
576 577 578 579 580

	DECODE_TAIL;
}


581
static __be32
L
Linus Torvalds 已提交
582 583 584 585 586 587 588 589 590 591 592
nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
{
	DECODE_HEAD;

	READ_BUF(12);
	READ64(commit->co_offset);
	READ32(commit->co_count);

	DECODE_TAIL;
}

593
static __be32
L
Linus Torvalds 已提交
594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623
nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
{
	DECODE_HEAD;

	READ_BUF(4);
	READ32(create->cr_type);
	switch (create->cr_type) {
	case NF4LNK:
		READ_BUF(4);
		READ32(create->cr_linklen);
		READ_BUF(create->cr_linklen);
		SAVEMEM(create->cr_linkname, create->cr_linklen);
		break;
	case NF4BLK:
	case NF4CHR:
		READ_BUF(8);
		READ32(create->cr_specdata1);
		READ32(create->cr_specdata2);
		break;
	case NF4SOCK:
	case NF4FIFO:
	case NF4DIR:
	default:
		break;
	}

	READ_BUF(4);
	READ32(create->cr_namelen);
	READ_BUF(create->cr_namelen);
	SAVEMEM(create->cr_name, create->cr_namelen);
624
	if ((status = check_filename(create->cr_name, create->cr_namelen)))
L
Linus Torvalds 已提交
625 626
		return status;

627
	status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
628
				    &create->cr_acl, &create->cr_label);
629
	if (status)
L
Linus Torvalds 已提交
630 631 632 633 634
		goto out;

	DECODE_TAIL;
}

635
static inline __be32
L
Linus Torvalds 已提交
636 637
nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
{
638
	return nfsd4_decode_stateid(argp, &dr->dr_stateid);
L
Linus Torvalds 已提交
639 640
}

641
static inline __be32
L
Linus Torvalds 已提交
642 643 644 645 646
nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
{
	return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
}

647
static __be32
L
Linus Torvalds 已提交
648 649 650 651 652 653 654 655
nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
{
	DECODE_HEAD;

	READ_BUF(4);
	READ32(link->li_namelen);
	READ_BUF(link->li_namelen);
	SAVEMEM(link->li_name, link->li_namelen);
656
	if ((status = check_filename(link->li_name, link->li_namelen)))
L
Linus Torvalds 已提交
657 658 659 660 661
		return status;

	DECODE_TAIL;
}

662
static __be32
L
Linus Torvalds 已提交
663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679
nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
{
	DECODE_HEAD;

	/*
	* type, reclaim(boolean), offset, length, new_lock_owner(boolean)
	*/
	READ_BUF(28);
	READ32(lock->lk_type);
	if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
		goto xdr_error;
	READ32(lock->lk_reclaim);
	READ64(lock->lk_offset);
	READ64(lock->lk_length);
	READ32(lock->lk_is_new);

	if (lock->lk_is_new) {
680
		READ_BUF(4);
L
Linus Torvalds 已提交
681
		READ32(lock->lk_new_open_seqid);
682 683 684 685
		status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
		if (status)
			return status;
		READ_BUF(8 + sizeof(clientid_t));
L
Linus Torvalds 已提交
686 687 688 689 690 691
		READ32(lock->lk_new_lock_seqid);
		COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
		READ32(lock->lk_new_owner.len);
		READ_BUF(lock->lk_new_owner.len);
		READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
	} else {
692 693 694 695
		status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
		if (status)
			return status;
		READ_BUF(4);
L
Linus Torvalds 已提交
696 697 698 699 700 701
		READ32(lock->lk_old_lock_seqid);
	}

	DECODE_TAIL;
}

702
static __be32
L
Linus Torvalds 已提交
703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720
nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
{
	DECODE_HEAD;
		        
	READ_BUF(32);
	READ32(lockt->lt_type);
	if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
		goto xdr_error;
	READ64(lockt->lt_offset);
	READ64(lockt->lt_length);
	COPYMEM(&lockt->lt_clientid, 8);
	READ32(lockt->lt_owner.len);
	READ_BUF(lockt->lt_owner.len);
	READMEM(lockt->lt_owner.data, lockt->lt_owner.len);

	DECODE_TAIL;
}

721
static __be32
L
Linus Torvalds 已提交
722 723 724 725
nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
{
	DECODE_HEAD;

726
	READ_BUF(8);
L
Linus Torvalds 已提交
727 728 729 730
	READ32(locku->lu_type);
	if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
		goto xdr_error;
	READ32(locku->lu_seqid);
731 732 733 734
	status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
	if (status)
		return status;
	READ_BUF(16);
L
Linus Torvalds 已提交
735 736 737 738 739 740
	READ64(locku->lu_offset);
	READ64(locku->lu_length);

	DECODE_TAIL;
}

741
static __be32
L
Linus Torvalds 已提交
742 743 744 745 746 747 748 749
nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
{
	DECODE_HEAD;

	READ_BUF(4);
	READ32(lookup->lo_len);
	READ_BUF(lookup->lo_len);
	SAVEMEM(lookup->lo_name, lookup->lo_len);
750
	if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
L
Linus Torvalds 已提交
751 752 753 754 755
		return status;

	DECODE_TAIL;
}

756
static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
757 758 759 760 761 762
{
	__be32 *p;
	u32 w;

	READ_BUF(4);
	READ32(w);
763 764 765 766 767
	*share_access = w & NFS4_SHARE_ACCESS_MASK;
	*deleg_want = w & NFS4_SHARE_WANT_MASK;
	if (deleg_when)
		*deleg_when = w & NFS4_SHARE_WHEN_MASK;

768 769 770 771 772 773 774 775
	switch (w & NFS4_SHARE_ACCESS_MASK) {
	case NFS4_SHARE_ACCESS_READ:
	case NFS4_SHARE_ACCESS_WRITE:
	case NFS4_SHARE_ACCESS_BOTH:
		break;
	default:
		return nfserr_bad_xdr;
	}
776
	w &= ~NFS4_SHARE_ACCESS_MASK;
777 778 779 780 781 782 783 784 785 786 787 788 789 790 791
	if (!w)
		return nfs_ok;
	if (!argp->minorversion)
		return nfserr_bad_xdr;
	switch (w & NFS4_SHARE_WANT_MASK) {
	case NFS4_SHARE_WANT_NO_PREFERENCE:
	case NFS4_SHARE_WANT_READ_DELEG:
	case NFS4_SHARE_WANT_WRITE_DELEG:
	case NFS4_SHARE_WANT_ANY_DELEG:
	case NFS4_SHARE_WANT_NO_DELEG:
	case NFS4_SHARE_WANT_CANCEL:
		break;
	default:
		return nfserr_bad_xdr;
	}
792
	w &= ~NFS4_SHARE_WANT_MASK;
793 794
	if (!w)
		return nfs_ok;
795 796 797

	if (!deleg_when)	/* open_downgrade */
		return nfserr_inval;
798 799 800
	switch (w) {
	case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
	case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
801 802
	case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
	      NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
803 804 805 806 807 808 809 810 811 812 813 814 815
		return nfs_ok;
	}
xdr_error:
	return nfserr_bad_xdr;
}

static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
{
	__be32 *p;

	READ_BUF(4);
	READ32(*x);
	/* Note: unlinke access bits, deny bits may be zero. */
816
	if (*x & ~NFS4_SHARE_DENY_BOTH)
817 818 819 820 821 822
		return nfserr_bad_xdr;
	return nfs_ok;
xdr_error:
	return nfserr_bad_xdr;
}

823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839
static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
{
	__be32 *p;

	READ_BUF(4);
	READ32(o->len);

	if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
		return nfserr_bad_xdr;

	READ_BUF(o->len);
	SAVEMEM(o->data, o->len);
	return nfs_ok;
xdr_error:
	return nfserr_bad_xdr;
}

840
static __be32
L
Linus Torvalds 已提交
841 842 843
nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
{
	DECODE_HEAD;
844
	u32 dummy;
L
Linus Torvalds 已提交
845 846 847

	memset(open->op_bmval, 0, sizeof(open->op_bmval));
	open->op_iattr.ia_valid = 0;
848
	open->op_openowner = NULL;
L
Linus Torvalds 已提交
849

850
	open->op_xdr_error = 0;
L
Linus Torvalds 已提交
851
	/* seqid, share_access, share_deny, clientid, ownerlen */
852
	READ_BUF(4);
L
Linus Torvalds 已提交
853
	READ32(open->op_seqid);
854 855 856
	/* decode, yet ignore deleg_when until supported */
	status = nfsd4_decode_share_access(argp, &open->op_share_access,
					   &open->op_deleg_want, &dummy);
857 858 859 860 861
	if (status)
		goto xdr_error;
	status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
	if (status)
		goto xdr_error;
862
	READ_BUF(sizeof(clientid_t));
L
Linus Torvalds 已提交
863
	COPYMEM(&open->op_clientid, sizeof(clientid_t));
864 865 866 867
	status = nfsd4_decode_opaque(argp, &open->op_owner);
	if (status)
		goto xdr_error;
	READ_BUF(4);
L
Linus Torvalds 已提交
868 869 870 871 872 873 874 875 876 877
	READ32(open->op_create);
	switch (open->op_create) {
	case NFS4_OPEN_NOCREATE:
		break;
	case NFS4_OPEN_CREATE:
		READ_BUF(4);
		READ32(open->op_createmode);
		switch (open->op_createmode) {
		case NFS4_CREATE_UNCHECKED:
		case NFS4_CREATE_GUARDED:
878
			status = nfsd4_decode_fattr(argp, open->op_bmval,
879
				&open->op_iattr, &open->op_acl, &open->op_label);
880
			if (status)
L
Linus Torvalds 已提交
881 882 883
				goto out;
			break;
		case NFS4_CREATE_EXCLUSIVE:
884 885
			READ_BUF(NFS4_VERIFIER_SIZE);
			COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
886
			break;
B
Benny Halevy 已提交
887 888 889
		case NFS4_CREATE_EXCLUSIVE4_1:
			if (argp->minorversion < 1)
				goto xdr_error;
890 891
			READ_BUF(NFS4_VERIFIER_SIZE);
			COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
B
Benny Halevy 已提交
892
			status = nfsd4_decode_fattr(argp, open->op_bmval,
893
				&open->op_iattr, &open->op_acl, &open->op_label);
B
Benny Halevy 已提交
894 895 896
			if (status)
				goto out;
			break;
L
Linus Torvalds 已提交
897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914
		default:
			goto xdr_error;
		}
		break;
	default:
		goto xdr_error;
	}

	/* open_claim */
	READ_BUF(4);
	READ32(open->op_claim_type);
	switch (open->op_claim_type) {
	case NFS4_OPEN_CLAIM_NULL:
	case NFS4_OPEN_CLAIM_DELEGATE_PREV:
		READ_BUF(4);
		READ32(open->op_fname.len);
		READ_BUF(open->op_fname.len);
		SAVEMEM(open->op_fname.data, open->op_fname.len);
915
		if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
L
Linus Torvalds 已提交
916 917 918 919 920 921 922
			return status;
		break;
	case NFS4_OPEN_CLAIM_PREVIOUS:
		READ_BUF(4);
		READ32(open->op_delegate_type);
		break;
	case NFS4_OPEN_CLAIM_DELEGATE_CUR:
923 924 925 926
		status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
		if (status)
			return status;
		READ_BUF(4);
L
Linus Torvalds 已提交
927 928 929
		READ32(open->op_fname.len);
		READ_BUF(open->op_fname.len);
		SAVEMEM(open->op_fname.data, open->op_fname.len);
930
		if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
L
Linus Torvalds 已提交
931 932
			return status;
		break;
933 934 935 936 937 938 939 940 941 942 943 944 945
	case NFS4_OPEN_CLAIM_FH:
	case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
		if (argp->minorversion < 1)
			goto xdr_error;
		/* void */
		break;
	case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
		if (argp->minorversion < 1)
			goto xdr_error;
		status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
		if (status)
			return status;
		break;
L
Linus Torvalds 已提交
946 947 948 949 950 951 952
	default:
		goto xdr_error;
	}

	DECODE_TAIL;
}

953
static __be32
L
Linus Torvalds 已提交
954 955 956
nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
{
	DECODE_HEAD;
957 958 959 960

	if (argp->minorversion >= 1)
		return nfserr_notsupp;

961 962 963 964
	status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
	if (status)
		return status;
	READ_BUF(4);
L
Linus Torvalds 已提交
965
	READ32(open_conf->oc_seqid);
966

L
Linus Torvalds 已提交
967 968 969
	DECODE_TAIL;
}

970
static __be32
L
Linus Torvalds 已提交
971 972 973 974
nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
{
	DECODE_HEAD;
		    
975 976 977
	status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
	if (status)
		return status;
978
	READ_BUF(4);
L
Linus Torvalds 已提交
979
	READ32(open_down->od_seqid);
980 981
	status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
					   &open_down->od_deleg_want, NULL);
982 983 984 985 986
	if (status)
		return status;
	status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
	if (status)
		return status;
L
Linus Torvalds 已提交
987 988 989
	DECODE_TAIL;
}

990
static __be32
L
Linus Torvalds 已提交
991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004
nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
{
	DECODE_HEAD;

	READ_BUF(4);
	READ32(putfh->pf_fhlen);
	if (putfh->pf_fhlen > NFS4_FHSIZE)
		goto xdr_error;
	READ_BUF(putfh->pf_fhlen);
	SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);

	DECODE_TAIL;
}

1005 1006 1007 1008 1009 1010 1011 1012
static __be32
nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
{
	if (argp->minorversion == 0)
		return nfs_ok;
	return nfserr_notsupp;
}

1013
static __be32
L
Linus Torvalds 已提交
1014 1015 1016 1017
nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
{
	DECODE_HEAD;

1018 1019 1020 1021
	status = nfsd4_decode_stateid(argp, &read->rd_stateid);
	if (status)
		return status;
	READ_BUF(12);
L
Linus Torvalds 已提交
1022 1023 1024 1025 1026 1027
	READ64(read->rd_offset);
	READ32(read->rd_length);

	DECODE_TAIL;
}

1028
static __be32
L
Linus Torvalds 已提交
1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043
nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
{
	DECODE_HEAD;

	READ_BUF(24);
	READ64(readdir->rd_cookie);
	COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
	READ32(readdir->rd_dircount);    /* just in case you needed a useless field... */
	READ32(readdir->rd_maxcount);
	if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
		goto out;

	DECODE_TAIL;
}

1044
static __be32
L
Linus Torvalds 已提交
1045 1046 1047 1048 1049 1050 1051 1052
nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
{
	DECODE_HEAD;

	READ_BUF(4);
	READ32(remove->rm_namelen);
	READ_BUF(remove->rm_namelen);
	SAVEMEM(remove->rm_name, remove->rm_namelen);
1053
	if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
L
Linus Torvalds 已提交
1054 1055 1056 1057 1058
		return status;

	DECODE_TAIL;
}

1059
static __be32
L
Linus Torvalds 已提交
1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070
nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
{
	DECODE_HEAD;

	READ_BUF(4);
	READ32(rename->rn_snamelen);
	READ_BUF(rename->rn_snamelen + 4);
	SAVEMEM(rename->rn_sname, rename->rn_snamelen);
	READ32(rename->rn_tnamelen);
	READ_BUF(rename->rn_tnamelen);
	SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1071
	if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
L
Linus Torvalds 已提交
1072
		return status;
1073
	if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
L
Linus Torvalds 已提交
1074 1075 1076 1077 1078
		return status;

	DECODE_TAIL;
}

1079
static __be32
L
Linus Torvalds 已提交
1080 1081 1082 1083
nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
{
	DECODE_HEAD;

1084 1085 1086
	if (argp->minorversion >= 1)
		return nfserr_notsupp;

L
Linus Torvalds 已提交
1087 1088 1089 1090 1091 1092
	READ_BUF(sizeof(clientid_t));
	COPYMEM(clientid, sizeof(clientid_t));

	DECODE_TAIL;
}

A
Andy Adamson 已提交
1093 1094 1095 1096 1097 1098 1099 1100 1101 1102
static __be32
nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
		     struct nfsd4_secinfo *secinfo)
{
	DECODE_HEAD;

	READ_BUF(4);
	READ32(secinfo->si_namelen);
	READ_BUF(secinfo->si_namelen);
	SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1103
	status = check_filename(secinfo->si_name, secinfo->si_namelen);
A
Andy Adamson 已提交
1104 1105 1106 1107 1108
	if (status)
		return status;
	DECODE_TAIL;
}

J
J. Bruce Fields 已提交
1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119
static __be32
nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
		     struct nfsd4_secinfo_no_name *sin)
{
	DECODE_HEAD;

	READ_BUF(4);
	READ32(sin->sin_style);
	DECODE_TAIL;
}

1120
static __be32
L
Linus Torvalds 已提交
1121 1122
nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
{
1123
	__be32 status;
L
Linus Torvalds 已提交
1124

1125 1126 1127
	status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
	if (status)
		return status;
1128
	return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1129
				  &setattr->sa_acl, &setattr->sa_label);
L
Linus Torvalds 已提交
1130 1131
}

1132
static __be32
L
Linus Torvalds 已提交
1133 1134 1135 1136
nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
{
	DECODE_HEAD;

1137 1138 1139
	if (argp->minorversion >= 1)
		return nfserr_notsupp;

1140 1141
	READ_BUF(NFS4_VERIFIER_SIZE);
	COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
1142

1143 1144 1145 1146
	status = nfsd4_decode_opaque(argp, &setclientid->se_name);
	if (status)
		return nfserr_bad_xdr;
	READ_BUF(8);
L
Linus Torvalds 已提交
1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160
	READ32(setclientid->se_callback_prog);
	READ32(setclientid->se_callback_netid_len);

	READ_BUF(setclientid->se_callback_netid_len + 4);
	SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
	READ32(setclientid->se_callback_addr_len);

	READ_BUF(setclientid->se_callback_addr_len + 4);
	SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
	READ32(setclientid->se_callback_ident);

	DECODE_TAIL;
}

1161
static __be32
L
Linus Torvalds 已提交
1162 1163 1164 1165
nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
{
	DECODE_HEAD;

1166 1167 1168
	if (argp->minorversion >= 1)
		return nfserr_notsupp;

1169
	READ_BUF(8 + NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
1170
	COPYMEM(&scd_c->sc_clientid, 8);
1171
	COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
1172 1173 1174 1175 1176

	DECODE_TAIL;
}

/* Also used for NVERIFY */
1177
static __be32
L
Linus Torvalds 已提交
1178 1179 1180 1181 1182 1183 1184 1185
nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
{
	DECODE_HEAD;

	if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
		goto out;

	/* For convenience's sake, we compare raw xdr'd attributes in
1186 1187
	 * nfsd4_proc_verify */

L
Linus Torvalds 已提交
1188 1189 1190 1191 1192 1193 1194 1195
	READ_BUF(4);
	READ32(verify->ve_attrlen);
	READ_BUF(verify->ve_attrlen);
	SAVEMEM(verify->ve_attrval, verify->ve_attrlen);

	DECODE_TAIL;
}

1196
static __be32
L
Linus Torvalds 已提交
1197 1198 1199 1200 1201 1202
nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
{
	int avail;
	int len;
	DECODE_HEAD;

1203 1204 1205 1206
	status = nfsd4_decode_stateid(argp, &write->wr_stateid);
	if (status)
		return status;
	READ_BUF(16);
L
Linus Torvalds 已提交
1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218
	READ64(write->wr_offset);
	READ32(write->wr_stable_how);
	if (write->wr_stable_how > 2)
		goto xdr_error;
	READ32(write->wr_buflen);

	/* Sorry .. no magic macros for this.. *
	 * READ_BUF(write->wr_buflen);
	 * SAVEMEM(write->wr_buf, write->wr_buflen);
	 */
	avail = (char*)argp->end - (char*)argp->p;
	if (avail + argp->pagelen < write->wr_buflen) {
1219 1220
		dprintk("NFSD: xdr error (%s:%d)\n",
				__FILE__, __LINE__);
L
Linus Torvalds 已提交
1221 1222
		goto xdr_error;
	}
1223 1224
	write->wr_head.iov_base = p;
	write->wr_head.iov_len = avail;
J
J. Bruce Fields 已提交
1225
	WARN_ON(avail != (XDR_QUADLEN(avail) << 2));
1226
	write->wr_pagelist = argp->pagelist;
J
J. Bruce Fields 已提交
1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239

	len = XDR_QUADLEN(write->wr_buflen) << 2;
	if (len >= avail) {
		int pages;

		len -= avail;

		pages = len >> PAGE_SHIFT;
		argp->pagelist += pages;
		argp->pagelen -= pages * PAGE_SIZE;
		len -= pages * PAGE_SIZE;

		argp->p = (__be32 *)page_address(argp->pagelist[0]);
1240
		argp->pagelist++;
J
J. Bruce Fields 已提交
1241
		argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
L
Linus Torvalds 已提交
1242
	}
J
J. Bruce Fields 已提交
1243
	argp->p += XDR_QUADLEN(len);
L
Linus Torvalds 已提交
1244 1245 1246 1247

	DECODE_TAIL;
}

1248
static __be32
L
Linus Torvalds 已提交
1249 1250 1251 1252
nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
{
	DECODE_HEAD;

1253 1254 1255
	if (argp->minorversion >= 1)
		return nfserr_notsupp;

L
Linus Torvalds 已提交
1256 1257 1258 1259 1260 1261
	READ_BUF(12);
	COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
	READ32(rlockowner->rl_owner.len);
	READ_BUF(rlockowner->rl_owner.len);
	READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);

A
Andy Adamson 已提交
1262 1263
	if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
		return nfserr_inval;
L
Linus Torvalds 已提交
1264 1265 1266
	DECODE_TAIL;
}

A
Andy Adamson 已提交
1267 1268
static __be32
nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
A
Andy Adamson 已提交
1269
			 struct nfsd4_exchange_id *exid)
A
Andy Adamson 已提交
1270
{
1271
	int dummy, tmp;
A
Andy Adamson 已提交
1272 1273 1274 1275 1276
	DECODE_HEAD;

	READ_BUF(NFS4_VERIFIER_SIZE);
	COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);

1277 1278 1279
	status = nfsd4_decode_opaque(argp, &exid->clname);
	if (status)
		return nfserr_bad_xdr;
A
Andy Adamson 已提交
1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316

	READ_BUF(4);
	READ32(exid->flags);

	/* Ignore state_protect4_a */
	READ_BUF(4);
	READ32(exid->spa_how);
	switch (exid->spa_how) {
	case SP4_NONE:
		break;
	case SP4_MACH_CRED:
		/* spo_must_enforce */
		READ_BUF(4);
		READ32(dummy);
		READ_BUF(dummy * 4);
		p += dummy;

		/* spo_must_allow */
		READ_BUF(4);
		READ32(dummy);
		READ_BUF(dummy * 4);
		p += dummy;
		break;
	case SP4_SSV:
		/* ssp_ops */
		READ_BUF(4);
		READ32(dummy);
		READ_BUF(dummy * 4);
		p += dummy;

		READ_BUF(4);
		READ32(dummy);
		READ_BUF(dummy * 4);
		p += dummy;

		/* ssp_hash_algs<> */
		READ_BUF(4);
1317 1318 1319 1320 1321 1322 1323
		READ32(tmp);
		while (tmp--) {
			READ_BUF(4);
			READ32(dummy);
			READ_BUF(dummy);
			p += XDR_QUADLEN(dummy);
		}
A
Andy Adamson 已提交
1324 1325 1326

		/* ssp_encr_algs<> */
		READ_BUF(4);
1327 1328 1329 1330 1331 1332 1333
		READ32(tmp);
		while (tmp--) {
			READ_BUF(4);
			READ32(dummy);
			READ_BUF(dummy);
			p += XDR_QUADLEN(dummy);
		}
A
Andy Adamson 已提交
1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368

		/* ssp_window and ssp_num_gss_handles */
		READ_BUF(8);
		READ32(dummy);
		READ32(dummy);
		break;
	default:
		goto xdr_error;
	}

	/* Ignore Implementation ID */
	READ_BUF(4);    /* nfs_impl_id4 array length */
	READ32(dummy);

	if (dummy > 1)
		goto xdr_error;

	if (dummy == 1) {
		/* nii_domain */
		READ_BUF(4);
		READ32(dummy);
		READ_BUF(dummy);
		p += XDR_QUADLEN(dummy);

		/* nii_name */
		READ_BUF(4);
		READ32(dummy);
		READ_BUF(dummy);
		p += XDR_QUADLEN(dummy);

		/* nii_date */
		READ_BUF(12);
		p += 3;
	}
	DECODE_TAIL;
A
Andy Adamson 已提交
1369 1370 1371 1372 1373 1374
}

static __be32
nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
			    struct nfsd4_create_session *sess)
{
A
Andy Adamson 已提交
1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416
	DECODE_HEAD;
	u32 dummy;

	READ_BUF(16);
	COPYMEM(&sess->clientid, 8);
	READ32(sess->seqid);
	READ32(sess->flags);

	/* Fore channel attrs */
	READ_BUF(28);
	READ32(dummy); /* headerpadsz is always 0 */
	READ32(sess->fore_channel.maxreq_sz);
	READ32(sess->fore_channel.maxresp_sz);
	READ32(sess->fore_channel.maxresp_cached);
	READ32(sess->fore_channel.maxops);
	READ32(sess->fore_channel.maxreqs);
	READ32(sess->fore_channel.nr_rdma_attrs);
	if (sess->fore_channel.nr_rdma_attrs == 1) {
		READ_BUF(4);
		READ32(sess->fore_channel.rdma_attrs);
	} else if (sess->fore_channel.nr_rdma_attrs > 1) {
		dprintk("Too many fore channel attr bitmaps!\n");
		goto xdr_error;
	}

	/* Back channel attrs */
	READ_BUF(28);
	READ32(dummy); /* headerpadsz is always 0 */
	READ32(sess->back_channel.maxreq_sz);
	READ32(sess->back_channel.maxresp_sz);
	READ32(sess->back_channel.maxresp_cached);
	READ32(sess->back_channel.maxops);
	READ32(sess->back_channel.maxreqs);
	READ32(sess->back_channel.nr_rdma_attrs);
	if (sess->back_channel.nr_rdma_attrs == 1) {
		READ_BUF(4);
		READ32(sess->back_channel.rdma_attrs);
	} else if (sess->back_channel.nr_rdma_attrs > 1) {
		dprintk("Too many back channel attr bitmaps!\n");
		goto xdr_error;
	}

1417
	READ_BUF(4);
A
Andy Adamson 已提交
1418
	READ32(sess->callback_prog);
1419
	nfsd4_decode_cb_sec(argp, &sess->cb_sec);
A
Andy Adamson 已提交
1420
	DECODE_TAIL;
A
Andy Adamson 已提交
1421 1422 1423 1424 1425 1426
}

static __be32
nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
			     struct nfsd4_destroy_session *destroy_session)
{
B
Benny Halevy 已提交
1427 1428 1429 1430 1431
	DECODE_HEAD;
	READ_BUF(NFS4_MAX_SESSIONID_LEN);
	COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);

	DECODE_TAIL;
A
Andy Adamson 已提交
1432 1433
}

1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446
static __be32
nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
			  struct nfsd4_free_stateid *free_stateid)
{
	DECODE_HEAD;

	READ_BUF(sizeof(stateid_t));
	READ32(free_stateid->fr_stateid.si_generation);
	COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));

	DECODE_TAIL;
}

A
Andy Adamson 已提交
1447 1448 1449 1450
static __be32
nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
		      struct nfsd4_sequence *seq)
{
B
Benny Halevy 已提交
1451 1452 1453 1454 1455 1456 1457 1458 1459 1460
	DECODE_HEAD;

	READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
	COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
	READ32(seq->seqid);
	READ32(seq->slotid);
	READ32(seq->maxslots);
	READ32(seq->cachethis);

	DECODE_TAIL;
A
Andy Adamson 已提交
1461 1462
}

1463 1464 1465 1466
static __be32
nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
{
	int i;
1467 1468
	__be32 *p, status;
	struct nfsd4_test_stateid_id *stateid;
1469 1470 1471 1472

	READ_BUF(4);
	test_stateid->ts_num_ids = ntohl(*p++);

1473
	INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1474 1475

	for (i = 0; i < test_stateid->ts_num_ids; i++) {
1476 1477
		stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
		if (!stateid) {
1478
			status = nfserrno(-ENOMEM);
1479 1480 1481 1482 1483 1484 1485 1486
			goto out;
		}

		defer_free(argp, kfree, stateid);
		INIT_LIST_HEAD(&stateid->ts_id_list);
		list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);

		status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1487
		if (status)
1488
			goto out;
1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499
	}

	status = 0;
out:
	return status;
xdr_error:
	dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
	status = nfserr_bad_xdr;
	goto out;
}

1500 1501 1502 1503 1504 1505 1506 1507 1508 1509
static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
{
	DECODE_HEAD;

	READ_BUF(8);
	COPYMEM(&dc->clientid, 8);

	DECODE_TAIL;
}

1510 1511 1512 1513 1514 1515 1516 1517 1518 1519
static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
{
	DECODE_HEAD;

	READ_BUF(4);
	READ32(rc->rca_one_fs);

	DECODE_TAIL;
}

1520 1521 1522 1523 1524 1525
static __be32
nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
{
	return nfs_ok;
}

1526 1527 1528
static __be32
nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
{
1529
	return nfserr_notsupp;
1530 1531
}

1532 1533 1534
typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);

static nfsd4_dec nfsd4_dec_ops[] = {
1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554
	[OP_ACCESS]		= (nfsd4_dec)nfsd4_decode_access,
	[OP_CLOSE]		= (nfsd4_dec)nfsd4_decode_close,
	[OP_COMMIT]		= (nfsd4_dec)nfsd4_decode_commit,
	[OP_CREATE]		= (nfsd4_dec)nfsd4_decode_create,
	[OP_DELEGPURGE]		= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_DELEGRETURN]	= (nfsd4_dec)nfsd4_decode_delegreturn,
	[OP_GETATTR]		= (nfsd4_dec)nfsd4_decode_getattr,
	[OP_GETFH]		= (nfsd4_dec)nfsd4_decode_noop,
	[OP_LINK]		= (nfsd4_dec)nfsd4_decode_link,
	[OP_LOCK]		= (nfsd4_dec)nfsd4_decode_lock,
	[OP_LOCKT]		= (nfsd4_dec)nfsd4_decode_lockt,
	[OP_LOCKU]		= (nfsd4_dec)nfsd4_decode_locku,
	[OP_LOOKUP]		= (nfsd4_dec)nfsd4_decode_lookup,
	[OP_LOOKUPP]		= (nfsd4_dec)nfsd4_decode_noop,
	[OP_NVERIFY]		= (nfsd4_dec)nfsd4_decode_verify,
	[OP_OPEN]		= (nfsd4_dec)nfsd4_decode_open,
	[OP_OPENATTR]		= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_OPEN_CONFIRM]	= (nfsd4_dec)nfsd4_decode_open_confirm,
	[OP_OPEN_DOWNGRADE]	= (nfsd4_dec)nfsd4_decode_open_downgrade,
	[OP_PUTFH]		= (nfsd4_dec)nfsd4_decode_putfh,
1555
	[OP_PUTPUBFH]		= (nfsd4_dec)nfsd4_decode_putpubfh,
1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571
	[OP_PUTROOTFH]		= (nfsd4_dec)nfsd4_decode_noop,
	[OP_READ]		= (nfsd4_dec)nfsd4_decode_read,
	[OP_READDIR]		= (nfsd4_dec)nfsd4_decode_readdir,
	[OP_READLINK]		= (nfsd4_dec)nfsd4_decode_noop,
	[OP_REMOVE]		= (nfsd4_dec)nfsd4_decode_remove,
	[OP_RENAME]		= (nfsd4_dec)nfsd4_decode_rename,
	[OP_RENEW]		= (nfsd4_dec)nfsd4_decode_renew,
	[OP_RESTOREFH]		= (nfsd4_dec)nfsd4_decode_noop,
	[OP_SAVEFH]		= (nfsd4_dec)nfsd4_decode_noop,
	[OP_SECINFO]		= (nfsd4_dec)nfsd4_decode_secinfo,
	[OP_SETATTR]		= (nfsd4_dec)nfsd4_decode_setattr,
	[OP_SETCLIENTID]	= (nfsd4_dec)nfsd4_decode_setclientid,
	[OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
	[OP_VERIFY]		= (nfsd4_dec)nfsd4_decode_verify,
	[OP_WRITE]		= (nfsd4_dec)nfsd4_decode_write,
	[OP_RELEASE_LOCKOWNER]	= (nfsd4_dec)nfsd4_decode_release_lockowner,
A
Andy Adamson 已提交
1572 1573

	/* new operations for NFSv4.1 */
1574
	[OP_BACKCHANNEL_CTL]	= (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1575
	[OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
R
Randy Dunlap 已提交
1576 1577 1578
	[OP_EXCHANGE_ID]	= (nfsd4_dec)nfsd4_decode_exchange_id,
	[OP_CREATE_SESSION]	= (nfsd4_dec)nfsd4_decode_create_session,
	[OP_DESTROY_SESSION]	= (nfsd4_dec)nfsd4_decode_destroy_session,
1579
	[OP_FREE_STATEID]	= (nfsd4_dec)nfsd4_decode_free_stateid,
R
Randy Dunlap 已提交
1580 1581 1582 1583 1584 1585
	[OP_GET_DIR_DELEGATION]	= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_GETDEVICEINFO]	= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_GETDEVICELIST]	= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_LAYOUTCOMMIT]	= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_LAYOUTGET]		= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_LAYOUTRETURN]	= (nfsd4_dec)nfsd4_decode_notsupp,
J
J. Bruce Fields 已提交
1586
	[OP_SECINFO_NO_NAME]	= (nfsd4_dec)nfsd4_decode_secinfo_no_name,
R
Randy Dunlap 已提交
1587 1588
	[OP_SEQUENCE]		= (nfsd4_dec)nfsd4_decode_sequence,
	[OP_SET_SSV]		= (nfsd4_dec)nfsd4_decode_notsupp,
1589
	[OP_TEST_STATEID]	= (nfsd4_dec)nfsd4_decode_test_stateid,
R
Randy Dunlap 已提交
1590
	[OP_WANT_DELEGATION]	= (nfsd4_dec)nfsd4_decode_notsupp,
1591
	[OP_DESTROY_CLIENTID]	= (nfsd4_dec)nfsd4_decode_destroy_clientid,
1592
	[OP_RECLAIM_COMPLETE]	= (nfsd4_dec)nfsd4_decode_reclaim_complete,
A
Andy Adamson 已提交
1593 1594
};

1595 1596 1597
static inline bool
nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
{
1598
	if (op->opnum < FIRST_NFS4_OP)
1599
		return false;
1600
	else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1601
		return false;
1602 1603 1604
	else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
		return false;
	else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1605 1606 1607
		return false;
	return true;
}
1608

1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634
/*
 * Return a rough estimate of the maximum possible reply size.  Note the
 * estimate includes rpc headers so is meant to be passed to
 * svc_reserve, not svc_reserve_auth.
 *
 * Also note the current compound encoding permits only one operation to
 * use pages beyond the first one, so the maximum possible length is the
 * maximum over these values, not the sum.
 */
static int nfsd4_max_reply(u32 opnum)
{
	switch (opnum) {
	case OP_READLINK:
	case OP_READDIR:
		/*
		 * Both of these ops take a single page for data and put
		 * the head and tail in another page:
		 */
		return 2 * PAGE_SIZE;
	case OP_READ:
		return INT_MAX;
	default:
		return PAGE_SIZE;
	}
}

1635
static __be32
L
Linus Torvalds 已提交
1636 1637 1638 1639
nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
{
	DECODE_HEAD;
	struct nfsd4_op *op;
1640
	bool cachethis = false;
1641
	int max_reply = PAGE_SIZE;
L
Linus Torvalds 已提交
1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655
	int i;

	READ_BUF(4);
	READ32(argp->taglen);
	READ_BUF(argp->taglen + 8);
	SAVEMEM(argp->tag, argp->taglen);
	READ32(argp->minorversion);
	READ32(argp->opcnt);

	if (argp->taglen > NFSD4_MAX_TAGLEN)
		goto xdr_error;
	if (argp->opcnt > 100)
		goto xdr_error;

1656
	if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
L
Linus Torvalds 已提交
1657 1658 1659
		argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
		if (!argp->ops) {
			argp->ops = argp->iops;
1660
			dprintk("nfsd: couldn't allocate room for COMPOUND\n");
L
Linus Torvalds 已提交
1661 1662 1663 1664
			goto xdr_error;
		}
	}

1665
	if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1666 1667
		argp->opcnt = 0;

L
Linus Torvalds 已提交
1668 1669 1670 1671
	for (i = 0; i < argp->opcnt; i++) {
		op = &argp->ops[i];
		op->replay = NULL;

J
J. Bruce Fields 已提交
1672 1673
		READ_BUF(4);
		READ32(op->opnum);
L
Linus Torvalds 已提交
1674

1675 1676
		if (nfsd4_opnum_in_range(argp, op))
			op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1677
		else {
L
Linus Torvalds 已提交
1678 1679 1680 1681 1682 1683 1684 1685
			op->opnum = OP_ILLEGAL;
			op->status = nfserr_op_illegal;
		}

		if (op->status) {
			argp->opcnt = i+1;
			break;
		}
1686 1687 1688 1689 1690
		/*
		 * We'll try to cache the result in the DRC if any one
		 * op in the compound wants to be cached:
		 */
		cachethis |= nfsd4_cache_this_op(op);
1691 1692

		max_reply = max(max_reply, nfsd4_max_reply(op->opnum));
L
Linus Torvalds 已提交
1693
	}
1694 1695 1696
	/* Sessions make the DRC unnecessary: */
	if (argp->minorversion)
		cachethis = false;
1697 1698
	if (max_reply != INT_MAX)
		svc_reserve(argp->rqstp, max_reply);
1699
	argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
L
Linus Torvalds 已提交
1700 1701 1702 1703 1704 1705 1706 1707 1708

	DECODE_TAIL;
}

#define WRITE32(n)               *p++ = htonl(n)
#define WRITE64(n)               do {				\
	*p++ = htonl((u32)((n) >> 32));				\
	*p++ = htonl((u32)(n));					\
} while (0)
1709
#define WRITEMEM(ptr,nbytes)     do { if (nbytes > 0) {		\
L
Linus Torvalds 已提交
1710 1711 1712
	*(p + XDR_QUADLEN(nbytes) -1) = 0;                      \
	memcpy(p, ptr, nbytes);					\
	p += XDR_QUADLEN(nbytes);				\
1713
}} while (0)
J
J. Bruce Fields 已提交
1714 1715 1716

static void write32(__be32 **p, u32 n)
{
1717
	*(*p)++ = htonl(n);
J
J. Bruce Fields 已提交
1718 1719 1720 1721
}

static void write64(__be32 **p, u64 n)
{
1722
	write32(p, (n >> 32));
J
J. Bruce Fields 已提交
1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748
	write32(p, (u32)n);
}

static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
{
	if (IS_I_VERSION(inode)) {
		write64(p, inode->i_version);
	} else {
		write32(p, stat->ctime.tv_sec);
		write32(p, stat->ctime.tv_nsec);
	}
}

static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
{
	write32(p, c->atomic);
	if (c->change_supported) {
		write64(p, c->before_change);
		write64(p, c->after_change);
	} else {
		write32(p, c->before_ctime_sec);
		write32(p, c->before_ctime_nsec);
		write32(p, c->after_ctime_sec);
		write32(p, c->after_ctime_nsec);
	}
}
L
Linus Torvalds 已提交
1749 1750 1751 1752 1753 1754 1755

#define RESERVE_SPACE(nbytes)	do {				\
	p = resp->p;						\
	BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end);		\
} while (0)
#define ADJUST_ARGS()		resp->p = p

1756
/* Encode as an array of strings the string given with components
1757
 * separated @sep, escaped with esc_enter and esc_exit.
1758
 */
1759 1760 1761
static __be32 nfsd4_encode_components_esc(char sep, char *components,
				   __be32 **pp, int *buflen,
				   char esc_enter, char esc_exit)
1762
{
A
Al Viro 已提交
1763 1764
	__be32 *p = *pp;
	__be32 *countp = p;
1765
	int strlen, count=0;
1766
	char *str, *end, *next;
1767 1768 1769 1770 1771 1772 1773

	dprintk("nfsd4_encode_components(%s)\n", components);
	if ((*buflen -= 4) < 0)
		return nfserr_resource;
	WRITE32(0); /* We will fill this in with @count later */
	end = str = components;
	while (*end) {
1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790
		bool found_esc = false;

		/* try to parse as esc_start, ..., esc_end, sep */
		if (*str == esc_enter) {
			for (; *end && (*end != esc_exit); end++)
				/* find esc_exit or end of string */;
			next = end + 1;
			if (*end && (!*next || *next == sep)) {
				str++;
				found_esc = true;
			}
		}

		if (!found_esc)
			for (; *end && (*end != sep); end++)
				/* find sep or end of string */;

1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808
		strlen = end - str;
		if (strlen) {
			if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
				return nfserr_resource;
			WRITE32(strlen);
			WRITEMEM(str, strlen);
			count++;
		}
		else
			end++;
		str = end;
	}
	*pp = p;
	p = countp;
	WRITE32(count);
	return 0;
}

1809 1810 1811 1812 1813 1814 1815 1816 1817
/* Encode as an array of strings the string given with components
 * separated @sep.
 */
static __be32 nfsd4_encode_components(char sep, char *components,
				   __be32 **pp, int *buflen)
{
	return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0);
}

1818 1819 1820
/*
 * encode a location element of a fs_locations structure
 */
1821
static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
A
Al Viro 已提交
1822
				    __be32 **pp, int *buflen)
1823
{
1824
	__be32 status;
A
Al Viro 已提交
1825
	__be32 *p = *pp;
1826

1827 1828
	status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen,
						'[', ']');
1829 1830 1831 1832 1833 1834 1835 1836 1837 1838
	if (status)
		return status;
	status = nfsd4_encode_components('/', location->path, &p, buflen);
	if (status)
		return status;
	*pp = p;
	return 0;
}

/*
T
Trond Myklebust 已提交
1839
 * Encode a path in RFC3530 'pathname4' format
1840
 */
T
Trond Myklebust 已提交
1841 1842
static __be32 nfsd4_encode_path(const struct path *root,
		const struct path *path, __be32 **pp, int *buflen)
1843
{
1844
	struct path cur = *path;
T
Trond Myklebust 已提交
1845 1846 1847 1848
	__be32 *p = *pp;
	struct dentry **components = NULL;
	unsigned int ncomponents = 0;
	__be32 err = nfserr_jukebox;
1849

T
Trond Myklebust 已提交
1850
	dprintk("nfsd4_encode_components(");
1851

T
Trond Myklebust 已提交
1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875
	path_get(&cur);
	/* First walk the path up to the nfsd root, and store the
	 * dentries/path components in an array.
	 */
	for (;;) {
		if (cur.dentry == root->dentry && cur.mnt == root->mnt)
			break;
		if (cur.dentry == cur.mnt->mnt_root) {
			if (follow_up(&cur))
				continue;
			goto out_free;
		}
		if ((ncomponents & 15) == 0) {
			struct dentry **new;
			new = krealloc(components,
					sizeof(*new) * (ncomponents + 16),
					GFP_KERNEL);
			if (!new)
				goto out_free;
			components = new;
		}
		components[ncomponents++] = cur.dentry;
		cur.dentry = dget_parent(cur.dentry);
	}
1876

T
Trond Myklebust 已提交
1877 1878 1879 1880 1881 1882 1883
	*buflen -= 4;
	if (*buflen < 0)
		goto out_free;
	WRITE32(ncomponents);

	while (ncomponents) {
		struct dentry *dentry = components[ncomponents - 1];
1884
		unsigned int len;
T
Trond Myklebust 已提交
1885

1886 1887
		spin_lock(&dentry->d_lock);
		len = dentry->d_name.len;
T
Trond Myklebust 已提交
1888
		*buflen -= 4 + (XDR_QUADLEN(len) << 2);
1889 1890
		if (*buflen < 0) {
			spin_unlock(&dentry->d_lock);
T
Trond Myklebust 已提交
1891
			goto out_free;
1892
		}
T
Trond Myklebust 已提交
1893 1894 1895
		WRITE32(len);
		WRITEMEM(dentry->d_name.name, len);
		dprintk("/%s", dentry->d_name.name);
1896
		spin_unlock(&dentry->d_lock);
T
Trond Myklebust 已提交
1897 1898
		dput(dentry);
		ncomponents--;
1899
	}
T
Trond Myklebust 已提交
1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923

	*pp = p;
	err = 0;
out_free:
	dprintk(")\n");
	while (ncomponents)
		dput(components[--ncomponents]);
	kfree(components);
	path_put(&cur);
	return err;
}

static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp,
		const struct path *path, __be32 **pp, int *buflen)
{
	struct svc_export *exp_ps;
	__be32 res;

	exp_ps = rqst_find_fsidzero_export(rqstp);
	if (IS_ERR(exp_ps))
		return nfserrno(PTR_ERR(exp_ps));
	res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen);
	exp_put(exp_ps);
	return res;
1924 1925 1926 1927 1928
}

/*
 *  encode a fs_locations structure
 */
1929
static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1930
				     struct svc_export *exp,
A
Al Viro 已提交
1931
				     __be32 **pp, int *buflen)
1932
{
1933
	__be32 status;
1934
	int i;
A
Al Viro 已提交
1935
	__be32 *p = *pp;
1936 1937
	struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;

T
Trond Myklebust 已提交
1938
	status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen);
1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952
	if (status)
		return status;
	if ((*buflen -= 4) < 0)
		return nfserr_resource;
	WRITE32(fslocs->locations_count);
	for (i=0; i<fslocs->locations_count; i++) {
		status = nfsd4_encode_fs_location4(&fslocs->locations[i],
						   &p, buflen);
		if (status)
			return status;
	}
	*pp = p;
	return 0;
}
L
Linus Torvalds 已提交
1953

1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966
static u32 nfs4_file_type(umode_t mode)
{
	switch (mode & S_IFMT) {
	case S_IFIFO:	return NF4FIFO;
	case S_IFCHR:	return NF4CHR;
	case S_IFDIR:	return NF4DIR;
	case S_IFBLK:	return NF4BLK;
	case S_IFLNK:	return NF4LNK;
	case S_IFREG:	return NF4REG;
	case S_IFSOCK:	return NF4SOCK;
	default:	return NF4BAD;
	};
}
L
Linus Torvalds 已提交
1967

1968
static __be32
1969
nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, kuid_t uid, kgid_t gid,
A
Al Viro 已提交
1970
			__be32 **p, int *buflen)
L
Linus Torvalds 已提交
1971 1972 1973 1974 1975 1976 1977
{
	int status;

	if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
		return nfserr_resource;
	if (whotype != NFS4_ACL_WHO_NAMED)
		status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1978 1979
	else if (gid_valid(gid))
		status = nfsd_map_gid_to_name(rqstp, gid, (u8 *)(*p + 1));
L
Linus Torvalds 已提交
1980
	else
1981
		status = nfsd_map_uid_to_name(rqstp, uid, (u8 *)(*p + 1));
L
Linus Torvalds 已提交
1982 1983 1984 1985 1986 1987 1988 1989
	if (status < 0)
		return nfserrno(status);
	*p = xdr_encode_opaque(*p, NULL, status);
	*buflen -= (XDR_QUADLEN(status) << 2) + 4;
	BUG_ON(*buflen < 0);
	return 0;
}

1990
static inline __be32
1991
nfsd4_encode_user(struct svc_rqst *rqstp, kuid_t user, __be32 **p, int *buflen)
L
Linus Torvalds 已提交
1992
{
1993 1994
	return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, user, INVALID_GID,
				 p, buflen);
L
Linus Torvalds 已提交
1995 1996
}

1997
static inline __be32
1998
nfsd4_encode_group(struct svc_rqst *rqstp, kgid_t group, __be32 **p, int *buflen)
L
Linus Torvalds 已提交
1999
{
2000 2001
	return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, INVALID_UID, group,
				 p, buflen);
L
Linus Torvalds 已提交
2002 2003
}

2004
static inline __be32
2005
nfsd4_encode_aclname(struct svc_rqst *rqstp, struct nfs4_ace *ace,
A
Al Viro 已提交
2006
		__be32 **p, int *buflen)
L
Linus Torvalds 已提交
2007
{
2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
	kuid_t uid = INVALID_UID;
	kgid_t gid = INVALID_GID;

	if (ace->whotype == NFS4_ACL_WHO_NAMED) {
		if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
			gid = ace->who_gid;
		else
			uid = ace->who_uid;
	}
	return nfsd4_encode_name(rqstp, ace->whotype, uid, gid, p, buflen);
L
Linus Torvalds 已提交
2018 2019
}

2020 2021 2022 2023
#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
			      FATTR4_WORD0_RDATTR_ERROR)
#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID

2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
static inline __be32
nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen)
{
	__be32 *p = *pp;

	if (*buflen < ((XDR_QUADLEN(len) << 2) + 4 + 4 + 4))
		return nfserr_resource;

	/*
	 * For now we use a 0 here to indicate the null translation; in
	 * the future we may place a call to translation code here.
	 */
	if ((*buflen -= 8) < 0)
		return nfserr_resource;

	WRITE32(0); /* lfs */
	WRITE32(0); /* pi */
	p = xdr_encode_opaque(p, context, len);
	*buflen -= (XDR_QUADLEN(len) << 2) + 4;

	*pp = p;
	return 0;
}
#else
static inline __be32
2050
nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen)
2051 2052 2053
{ return 0; }
#endif

2054
static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068
{
	/* As per referral draft:  */
	if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
	    *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
		if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
	            *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
			*rdattr_err = NFSERR_MOVED;
		else
			return nfserr_moved;
	}
	*bmval0 &= WORD0_ABSENT_FS_ATTRS;
	*bmval1 &= WORD1_ABSENT_FS_ATTRS;
	return 0;
}
L
Linus Torvalds 已提交
2069

2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080

static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
{
	struct path path = exp->ex_path;
	int err;

	path_get(&path);
	while (follow_up(&path)) {
		if (path.dentry != path.mnt->mnt_root)
			break;
	}
A
Al Viro 已提交
2081
	err = vfs_getattr(&path, stat);
2082 2083 2084 2085
	path_put(&path);
	return err;
}

L
Linus Torvalds 已提交
2086 2087 2088 2089
/*
 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
 * ourselves.
 *
2090
 * countp is the buffer size in _words_
L
Linus Torvalds 已提交
2091
 */
2092
__be32
L
Linus Torvalds 已提交
2093
nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2094
		struct dentry *dentry, __be32 **buffer, int count, u32 *bmval,
2095
		struct svc_rqst *rqstp, int ignore_crossmnt)
L
Linus Torvalds 已提交
2096 2097 2098
{
	u32 bmval0 = bmval[0];
	u32 bmval1 = bmval[1];
2099
	u32 bmval2 = bmval[2];
L
Linus Torvalds 已提交
2100 2101 2102
	struct kstat stat;
	struct svc_fh tempfh;
	struct kstatfs statfs;
2103
	int buflen = count << 2;
A
Al Viro 已提交
2104
	__be32 *attrlenp;
L
Linus Torvalds 已提交
2105 2106
	u32 dummy;
	u64 dummy64;
2107
	u32 rdattr_err = 0;
2108
	__be32 *p = *buffer;
2109
	__be32 status;
2110
	int err;
L
Linus Torvalds 已提交
2111 2112
	int aclsupport = 0;
	struct nfs4_acl *acl = NULL;
2113 2114 2115
	void *context = NULL;
	int contextlen;
	bool contextsupport = false;
2116 2117
	struct nfsd4_compoundres *resp = rqstp->rq_resp;
	u32 minorversion = resp->cstate.minorversion;
2118 2119 2120 2121
	struct path path = {
		.mnt	= exp->ex_path.mnt,
		.dentry	= dentry,
	};
2122
	struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
L
Linus Torvalds 已提交
2123 2124

	BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2125 2126 2127
	BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
	BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
	BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
L
Linus Torvalds 已提交
2128

2129
	if (exp->ex_fslocs.migrated) {
2130
		BUG_ON(bmval[2]);
2131 2132 2133 2134 2135
		status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
		if (status)
			goto out;
	}

A
Al Viro 已提交
2136
	err = vfs_getattr(&path, &stat);
2137
	if (err)
L
Linus Torvalds 已提交
2138
		goto out_nfserr;
2139 2140
	if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
			FATTR4_WORD0_MAXNAME)) ||
L
Linus Torvalds 已提交
2141 2142
	    (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
		       FATTR4_WORD1_SPACE_TOTAL))) {
2143
		err = vfs_statfs(&path, &statfs);
2144
		if (err)
L
Linus Torvalds 已提交
2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155
			goto out_nfserr;
	}
	if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
		fh_init(&tempfh, NFS4_FHSIZE);
		status = fh_compose(&tempfh, exp, dentry, NULL);
		if (status)
			goto out;
		fhp = &tempfh;
	}
	if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
			| FATTR4_WORD0_SUPPORTED_ATTRS)) {
2156 2157
		err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
		aclsupport = (err == 0);
L
Linus Torvalds 已提交
2158
		if (bmval0 & FATTR4_WORD0_ACL) {
2159
			if (err == -EOPNOTSUPP)
L
Linus Torvalds 已提交
2160
				bmval0 &= ~FATTR4_WORD0_ACL;
2161
			else if (err == -EINVAL) {
L
Linus Torvalds 已提交
2162 2163
				status = nfserr_attrnotsupp;
				goto out;
2164
			} else if (err != 0)
L
Linus Torvalds 已提交
2165 2166 2167 2168
				goto out_nfserr;
		}
	}

2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
	if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
			bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
		err = security_inode_getsecctx(dentry->d_inode,
						&context, &contextlen);
		contextsupport = (err == 0);
		if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
			if (err == -EOPNOTSUPP)
				bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
			else if (err)
				goto out_nfserr;
		}
	}
#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */

2184 2185 2186
	if (bmval2) {
		if ((buflen -= 16) < 0)
			goto out_resource;
2187 2188 2189 2190
		WRITE32(3);
		WRITE32(bmval0);
		WRITE32(bmval1);
		WRITE32(bmval2);
2191 2192 2193
	} else if (bmval1) {
		if ((buflen -= 12) < 0)
			goto out_resource;
2194 2195 2196 2197
		WRITE32(2);
		WRITE32(bmval0);
		WRITE32(bmval1);
	} else {
2198 2199
		if ((buflen -= 8) < 0)
			goto out_resource;
2200 2201 2202
		WRITE32(1);
		WRITE32(bmval0);
	}
L
Linus Torvalds 已提交
2203 2204 2205
	attrlenp = p++;                /* to be backfilled later */

	if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2206 2207 2208 2209
		u32 word0 = nfsd_suppattrs0(minorversion);
		u32 word1 = nfsd_suppattrs1(minorversion);
		u32 word2 = nfsd_suppattrs2(minorversion);

2210 2211
		if (!aclsupport)
			word0 &= ~FATTR4_WORD0_ACL;
2212 2213
		if (!contextsupport)
			word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2214
		if (!word2) {
2215 2216
			if ((buflen -= 12) < 0)
				goto out_resource;
2217 2218 2219 2220
			WRITE32(2);
			WRITE32(word0);
			WRITE32(word1);
		} else {
2221 2222
			if ((buflen -= 16) < 0)
				goto out_resource;
2223 2224 2225 2226 2227
			WRITE32(3);
			WRITE32(word0);
			WRITE32(word1);
			WRITE32(word2);
		}
L
Linus Torvalds 已提交
2228 2229 2230 2231
	}
	if (bmval0 & FATTR4_WORD0_TYPE) {
		if ((buflen -= 4) < 0)
			goto out_resource;
2232
		dummy = nfs4_file_type(stat.mode);
2233 2234 2235 2236
		if (dummy == NF4BAD) {
			status = nfserr_serverfault;
			goto out;
		}
L
Linus Torvalds 已提交
2237 2238 2239 2240 2241
		WRITE32(dummy);
	}
	if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
		if ((buflen -= 4) < 0)
			goto out_resource;
N
NeilBrown 已提交
2242
		if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
N
NeilBrown 已提交
2243
			WRITE32(NFS4_FH_PERSISTENT);
N
NeilBrown 已提交
2244
		else
N
NeilBrown 已提交
2245
			WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
L
Linus Torvalds 已提交
2246 2247 2248 2249
	}
	if (bmval0 & FATTR4_WORD0_CHANGE) {
		if ((buflen -= 8) < 0)
			goto out_resource;
J
J. Bruce Fields 已提交
2250
		write_change(&p, &stat, dentry->d_inode);
L
Linus Torvalds 已提交
2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274
	}
	if (bmval0 & FATTR4_WORD0_SIZE) {
		if ((buflen -= 8) < 0)
			goto out_resource;
		WRITE64(stat.size);
	}
	if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(1);
	}
	if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(1);
	}
	if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(0);
	}
	if (bmval0 & FATTR4_WORD0_FSID) {
		if ((buflen -= 16) < 0)
			goto out_resource;
2275 2276 2277
		if (exp->ex_fslocs.migrated) {
			WRITE64(NFS4_REFERRAL_FSID_MAJOR);
			WRITE64(NFS4_REFERRAL_FSID_MINOR);
2278 2279
		} else switch(fsid_source(fhp)) {
		case FSIDSOURCE_FSID:
L
Linus Torvalds 已提交
2280 2281
			WRITE64((u64)exp->ex_fsid);
			WRITE64((u64)0);
2282 2283
			break;
		case FSIDSOURCE_DEV:
L
Linus Torvalds 已提交
2284 2285 2286 2287
			WRITE32(0);
			WRITE32(MAJOR(stat.dev));
			WRITE32(0);
			WRITE32(MINOR(stat.dev));
2288 2289 2290 2291
			break;
		case FSIDSOURCE_UUID:
			WRITEMEM(exp->ex_uuid, 16);
			break;
L
Linus Torvalds 已提交
2292 2293 2294 2295 2296 2297 2298 2299 2300 2301
		}
	}
	if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(0);
	}
	if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
		if ((buflen -= 4) < 0)
			goto out_resource;
2302
		WRITE32(nn->nfsd4_lease);
L
Linus Torvalds 已提交
2303 2304 2305 2306
	}
	if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
		if ((buflen -= 4) < 0)
			goto out_resource;
2307
		WRITE32(rdattr_err);
L
Linus Torvalds 已提交
2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322
	}
	if (bmval0 & FATTR4_WORD0_ACL) {
		struct nfs4_ace *ace;

		if (acl == NULL) {
			if ((buflen -= 4) < 0)
				goto out_resource;

			WRITE32(0);
			goto out_acl;
		}
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(acl->naces);

2323
		for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
L
Linus Torvalds 已提交
2324 2325 2326 2327 2328
			if ((buflen -= 4*3) < 0)
				goto out_resource;
			WRITE32(ace->type);
			WRITE32(ace->flag);
			WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
2329
			status = nfsd4_encode_aclname(rqstp, ace, &p, &buflen);
L
Linus Torvalds 已提交
2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348
			if (status)
				goto out;
		}
	}
out_acl:
	if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(aclsupport ?
			ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
	}
	if (bmval0 & FATTR4_WORD0_CANSETTIME) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(1);
	}
	if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
		if ((buflen -= 4) < 0)
			goto out_resource;
2349
		WRITE32(0);
L
Linus Torvalds 已提交
2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370
	}
	if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(1);
	}
	if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(1);
	}
	if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
		buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
		if (buflen < 0)
			goto out_resource;
		WRITE32(fhp->fh_handle.fh_size);
		WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
	}
	if (bmval0 & FATTR4_WORD0_FILEID) {
		if ((buflen -= 8) < 0)
			goto out_resource;
2371
		WRITE64(stat.ino);
L
Linus Torvalds 已提交
2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387
	}
	if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
		if ((buflen -= 8) < 0)
			goto out_resource;
		WRITE64((u64) statfs.f_ffree);
	}
	if (bmval0 & FATTR4_WORD0_FILES_FREE) {
		if ((buflen -= 8) < 0)
			goto out_resource;
		WRITE64((u64) statfs.f_ffree);
	}
	if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
		if ((buflen -= 8) < 0)
			goto out_resource;
		WRITE64((u64) statfs.f_files);
	}
2388 2389 2390 2391 2392
	if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
		status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
		if (status)
			goto out;
	}
L
Linus Torvalds 已提交
2393 2394 2395 2396 2397 2398 2399 2400
	if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(1);
	}
	if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
		if ((buflen -= 8) < 0)
			goto out_resource;
2401
		WRITE64(exp->ex_path.mnt->mnt_sb->s_maxbytes);
L
Linus Torvalds 已提交
2402 2403 2404 2405 2406 2407 2408 2409 2410
	}
	if (bmval0 & FATTR4_WORD0_MAXLINK) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(255);
	}
	if (bmval0 & FATTR4_WORD0_MAXNAME) {
		if ((buflen -= 4) < 0)
			goto out_resource;
2411
		WRITE32(statfs.f_namelen);
L
Linus Torvalds 已提交
2412 2413 2414 2415
	}
	if (bmval0 & FATTR4_WORD0_MAXREAD) {
		if ((buflen -= 8) < 0)
			goto out_resource;
2416
		WRITE64((u64) svc_max_payload(rqstp));
L
Linus Torvalds 已提交
2417 2418 2419 2420
	}
	if (bmval0 & FATTR4_WORD0_MAXWRITE) {
		if ((buflen -= 8) < 0)
			goto out_resource;
2421
		WRITE64((u64) svc_max_payload(rqstp));
L
Linus Torvalds 已提交
2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480
	}
	if (bmval1 & FATTR4_WORD1_MODE) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(stat.mode & S_IALLUGO);
	}
	if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(1);
	}
	if (bmval1 & FATTR4_WORD1_NUMLINKS) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(stat.nlink);
	}
	if (bmval1 & FATTR4_WORD1_OWNER) {
		status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
		if (status)
			goto out;
	}
	if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
		status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
		if (status)
			goto out;
	}
	if (bmval1 & FATTR4_WORD1_RAWDEV) {
		if ((buflen -= 8) < 0)
			goto out_resource;
		WRITE32((u32) MAJOR(stat.rdev));
		WRITE32((u32) MINOR(stat.rdev));
	}
	if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
		if ((buflen -= 8) < 0)
			goto out_resource;
		dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
		WRITE64(dummy64);
	}
	if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
		if ((buflen -= 8) < 0)
			goto out_resource;
		dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
		WRITE64(dummy64);
	}
	if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
		if ((buflen -= 8) < 0)
			goto out_resource;
		dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
		WRITE64(dummy64);
	}
	if (bmval1 & FATTR4_WORD1_SPACE_USED) {
		if ((buflen -= 8) < 0)
			goto out_resource;
		dummy64 = (u64)stat.blocks << 9;
		WRITE64(dummy64);
	}
	if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
		if ((buflen -= 12) < 0)
			goto out_resource;
2481
		WRITE64((s64)stat.atime.tv_sec);
L
Linus Torvalds 已提交
2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493
		WRITE32(stat.atime.tv_nsec);
	}
	if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
		if ((buflen -= 12) < 0)
			goto out_resource;
		WRITE32(0);
		WRITE32(1);
		WRITE32(0);
	}
	if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
		if ((buflen -= 12) < 0)
			goto out_resource;
2494
		WRITE64((s64)stat.ctime.tv_sec);
L
Linus Torvalds 已提交
2495 2496 2497 2498 2499
		WRITE32(stat.ctime.tv_nsec);
	}
	if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
		if ((buflen -= 12) < 0)
			goto out_resource;
2500
		WRITE64((s64)stat.mtime.tv_sec);
L
Linus Torvalds 已提交
2501 2502 2503 2504 2505
		WRITE32(stat.mtime.tv_nsec);
	}
	if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
		if ((buflen -= 8) < 0)
                	goto out_resource;
2506 2507 2508 2509 2510
		/*
		 * Get parent's attributes if not ignoring crossmount
		 * and this is the root of a cross-mounted filesystem.
		 */
		if (ignore_crossmnt == 0 &&
2511 2512
		    dentry == exp->ex_path.mnt->mnt_root)
			get_parent_attributes(exp, &stat);
2513
		WRITE64(stat.ino);
L
Linus Torvalds 已提交
2514
	}
2515 2516 2517 2518 2519 2520
	if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
		status = nfsd4_encode_security_label(rqstp, context,
				contextlen, &p, &buflen);
		if (status)
			goto out;
	}
2521 2522 2523 2524 2525 2526
	if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
		WRITE32(3);
		WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
		WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
		WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
	}
2527

L
Linus Torvalds 已提交
2528
	*attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2529
	*buffer = p;
L
Linus Torvalds 已提交
2530 2531 2532
	status = nfs_ok;

out:
2533
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2534 2535
	if (context)
		security_release_secctx(context, contextlen);
2536
#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2537
	kfree(acl);
L
Linus Torvalds 已提交
2538 2539 2540 2541
	if (fhp == &tempfh)
		fh_put(&tempfh);
	return status;
out_nfserr:
2542
	status = nfserrno(err);
L
Linus Torvalds 已提交
2543 2544 2545 2546 2547 2548
	goto out;
out_resource:
	status = nfserr_resource;
	goto out;
}

2549 2550 2551 2552 2553 2554 2555 2556 2557
static inline int attributes_need_mount(u32 *bmval)
{
	if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
		return 1;
	if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
		return 1;
	return 0;
}

2558
static __be32
L
Linus Torvalds 已提交
2559
nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2560
		const char *name, int namlen, __be32 **p, int buflen)
L
Linus Torvalds 已提交
2561 2562 2563
{
	struct svc_export *exp = cd->rd_fhp->fh_export;
	struct dentry *dentry;
2564
	__be32 nfserr;
2565
	int ignore_crossmnt = 0;
L
Linus Torvalds 已提交
2566 2567 2568 2569

	dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
	if (IS_ERR(dentry))
		return nfserrno(PTR_ERR(dentry));
2570 2571 2572 2573 2574 2575 2576 2577 2578
	if (!dentry->d_inode) {
		/*
		 * nfsd_buffered_readdir drops the i_mutex between
		 * readdir and calling this callback, leaving a window
		 * where this directory entry could have gone away.
		 */
		dput(dentry);
		return nfserr_noent;
	}
L
Linus Torvalds 已提交
2579 2580

	exp_get(exp);
2581 2582 2583 2584 2585 2586 2587
	/*
	 * In the case of a mountpoint, the client may be asking for
	 * attributes that are only properties of the underlying filesystem
	 * as opposed to the cross-mounted file system. In such a case,
	 * we will not follow the cross mount and will fill the attribtutes
	 * directly from the mountpoint dentry.
	 */
2588
	if (nfsd_mountpoint(dentry, exp)) {
2589 2590
		int err;

2591 2592 2593 2594 2595
		if (!(exp->ex_flags & NFSEXP_V4ROOT)
				&& !attributes_need_mount(cd->rd_bmval)) {
			ignore_crossmnt = 1;
			goto out_encode;
		}
A
Andy Adamson 已提交
2596 2597 2598 2599 2600
		/*
		 * Why the heck aren't we just using nfsd_lookup??
		 * Different "."/".." handling?  Something else?
		 * At least, add a comment here to explain....
		 */
2601 2602 2603
		err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
		if (err) {
			nfserr = nfserrno(err);
L
Linus Torvalds 已提交
2604 2605
			goto out_put;
		}
A
Andy Adamson 已提交
2606 2607 2608
		nfserr = check_nfsd_access(exp, cd->rd_rqstp);
		if (nfserr)
			goto out_put;
L
Linus Torvalds 已提交
2609 2610

	}
2611
out_encode:
L
Linus Torvalds 已提交
2612
	nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2613
					cd->rd_rqstp, ignore_crossmnt);
L
Linus Torvalds 已提交
2614 2615 2616 2617 2618 2619
out_put:
	dput(dentry);
	exp_put(exp);
	return nfserr;
}

A
Al Viro 已提交
2620
static __be32 *
2621
nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
L
Linus Torvalds 已提交
2622 2623 2624 2625 2626 2627 2628
{
	if (buflen < 6)
		return NULL;
	*p++ = htonl(2);
	*p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
	*p++ = htonl(0);			 /* bmval1 */

2629
	*p++ = htonl(4);     /* attribute length */
L
Linus Torvalds 已提交
2630 2631 2632 2633 2634
	*p++ = nfserr;       /* no htonl */
	return p;
}

static int
2635 2636
nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
		    loff_t offset, u64 ino, unsigned int d_type)
L
Linus Torvalds 已提交
2637
{
2638
	struct readdir_cd *ccd = ccdv;
L
Linus Torvalds 已提交
2639 2640
	struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
	int buflen;
A
Al Viro 已提交
2641
	__be32 *p = cd->buffer;
2642
	__be32 *cookiep;
2643
	__be32 nfserr = nfserr_toosmall;
L
Linus Torvalds 已提交
2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658

	/* In nfsv4, "." and ".." never make it onto the wire.. */
	if (name && isdotent(name, namlen)) {
		cd->common.err = nfs_ok;
		return 0;
	}

	if (cd->offset)
		xdr_encode_hyper(cd->offset, (u64) offset);

	buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
	if (buflen < 0)
		goto fail;

	*p++ = xdr_one;                             /* mark entry present */
2659
	cookiep = p;
L
Linus Torvalds 已提交
2660 2661 2662
	p = xdr_encode_hyper(p, NFS_OFFSET_MAX);    /* offset of next entry */
	p = xdr_encode_array(p, name, namlen);      /* name length & name */

2663
	nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, &p, buflen);
L
Linus Torvalds 已提交
2664 2665 2666 2667 2668 2669
	switch (nfserr) {
	case nfs_ok:
		break;
	case nfserr_resource:
		nfserr = nfserr_toosmall;
		goto fail;
2670 2671
	case nfserr_noent:
		goto skip_entry;
L
Linus Torvalds 已提交
2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682
	default:
		/*
		 * If the client requested the RDATTR_ERROR attribute,
		 * we stuff the error code into this attribute
		 * and continue.  If this attribute was not requested,
		 * then in accordance with the spec, we fail the
		 * entire READDIR operation(!)
		 */
		if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
			goto fail;
		p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2683 2684
		if (p == NULL) {
			nfserr = nfserr_toosmall;
L
Linus Torvalds 已提交
2685
			goto fail;
2686
		}
L
Linus Torvalds 已提交
2687 2688 2689
	}
	cd->buflen -= (p - cd->buffer);
	cd->buffer = p;
2690 2691
	cd->offset = cookiep;
skip_entry:
L
Linus Torvalds 已提交
2692 2693 2694 2695 2696 2697 2698
	cd->common.err = nfs_ok;
	return 0;
fail:
	cd->common.err = nfserr;
	return -EINVAL;
}

2699 2700 2701
static void
nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
{
2702
	__be32 *p;
2703 2704 2705 2706 2707 2708 2709

	RESERVE_SPACE(sizeof(stateid_t));
	WRITE32(sid->si_generation);
	WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
	ADJUST_ARGS();
}

2710
static __be32
2711
nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
L
Linus Torvalds 已提交
2712
{
2713
	__be32 *p;
L
Linus Torvalds 已提交
2714 2715 2716 2717 2718 2719 2720

	if (!nfserr) {
		RESERVE_SPACE(8);
		WRITE32(access->ac_supported);
		WRITE32(access->ac_resp_access);
		ADJUST_ARGS();
	}
2721
	return nfserr;
L
Linus Torvalds 已提交
2722 2723
}

2724 2725 2726 2727 2728 2729 2730 2731
static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
{
	__be32 *p;

	if (!nfserr) {
		RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
		WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
		WRITE32(bcts->dir);
2732
		/* Sorry, we do not yet support RDMA over 4.1: */
2733 2734 2735 2736 2737 2738
		WRITE32(0);
		ADJUST_ARGS();
	}
	return nfserr;
}

2739
static __be32
2740
nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
L
Linus Torvalds 已提交
2741
{
2742 2743 2744
	if (!nfserr)
		nfsd4_encode_stateid(resp, &close->cl_stateid);

2745
	return nfserr;
L
Linus Torvalds 已提交
2746 2747 2748
}


2749
static __be32
2750
nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
L
Linus Torvalds 已提交
2751
{
2752
	__be32 *p;
L
Linus Torvalds 已提交
2753 2754

	if (!nfserr) {
2755 2756
		RESERVE_SPACE(NFS4_VERIFIER_SIZE);
		WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
2757 2758
		ADJUST_ARGS();
	}
2759
	return nfserr;
L
Linus Torvalds 已提交
2760 2761
}

2762
static __be32
2763
nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
L
Linus Torvalds 已提交
2764
{
2765
	__be32 *p;
L
Linus Torvalds 已提交
2766 2767 2768

	if (!nfserr) {
		RESERVE_SPACE(32);
J
J. Bruce Fields 已提交
2769
		write_cinfo(&p, &create->cr_cinfo);
L
Linus Torvalds 已提交
2770 2771 2772 2773 2774
		WRITE32(2);
		WRITE32(create->cr_bmval[0]);
		WRITE32(create->cr_bmval[1]);
		ADJUST_ARGS();
	}
2775
	return nfserr;
L
Linus Torvalds 已提交
2776 2777
}

2778 2779
static __be32
nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
L
Linus Torvalds 已提交
2780 2781 2782 2783 2784 2785 2786 2787 2788
{
	struct svc_fh *fhp = getattr->ga_fhp;
	int buflen;

	if (nfserr)
		return nfserr;

	buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
	nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2789
				    &resp->p, buflen, getattr->ga_bmval,
2790
				    resp->rqstp, 0);
L
Linus Torvalds 已提交
2791 2792 2793
	return nfserr;
}

2794 2795
static __be32
nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
L
Linus Torvalds 已提交
2796
{
2797
	struct svc_fh *fhp = *fhpp;
L
Linus Torvalds 已提交
2798
	unsigned int len;
2799
	__be32 *p;
L
Linus Torvalds 已提交
2800 2801 2802 2803 2804 2805 2806 2807

	if (!nfserr) {
		len = fhp->fh_handle.fh_size;
		RESERVE_SPACE(len + 4);
		WRITE32(len);
		WRITEMEM(&fhp->fh_handle.fh_base, len);
		ADJUST_ARGS();
	}
2808
	return nfserr;
L
Linus Torvalds 已提交
2809 2810 2811 2812 2813 2814 2815 2816 2817
}

/*
* Including all fields other than the name, a LOCK4denied structure requires
*   8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
*/
static void
nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
{
2818
	struct xdr_netobj *conf = &ld->ld_owner;
2819
	__be32 *p;
L
Linus Torvalds 已提交
2820

2821
	RESERVE_SPACE(32 + XDR_LEN(conf->len));
L
Linus Torvalds 已提交
2822 2823 2824
	WRITE64(ld->ld_start);
	WRITE64(ld->ld_length);
	WRITE32(ld->ld_type);
2825
	if (conf->len) {
L
Linus Torvalds 已提交
2826
		WRITEMEM(&ld->ld_clientid, 8);
2827 2828 2829
		WRITE32(conf->len);
		WRITEMEM(conf->data, conf->len);
		kfree(conf->data);
L
Linus Torvalds 已提交
2830 2831 2832 2833 2834 2835 2836
	}  else {  /* non - nfsv4 lock in conflict, no clientid nor owner */
		WRITE64((u64)0); /* clientid */
		WRITE32(0); /* length of owner name */
	}
	ADJUST_ARGS();
}

2837
static __be32
2838
nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
L
Linus Torvalds 已提交
2839
{
2840 2841 2842
	if (!nfserr)
		nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
	else if (nfserr == nfserr_denied)
L
Linus Torvalds 已提交
2843 2844
		nfsd4_encode_lock_denied(resp, &lock->lk_denied);

2845
	return nfserr;
L
Linus Torvalds 已提交
2846 2847
}

2848
static __be32
2849
nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
L
Linus Torvalds 已提交
2850 2851 2852
{
	if (nfserr == nfserr_denied)
		nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2853
	return nfserr;
L
Linus Torvalds 已提交
2854 2855
}

2856
static __be32
2857
nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
L
Linus Torvalds 已提交
2858
{
2859 2860 2861
	if (!nfserr)
		nfsd4_encode_stateid(resp, &locku->lu_stateid);

2862
	return nfserr;
L
Linus Torvalds 已提交
2863 2864 2865
}


2866
static __be32
2867
nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
L
Linus Torvalds 已提交
2868
{
2869
	__be32 *p;
L
Linus Torvalds 已提交
2870 2871 2872

	if (!nfserr) {
		RESERVE_SPACE(20);
J
J. Bruce Fields 已提交
2873
		write_cinfo(&p, &link->li_cinfo);
L
Linus Torvalds 已提交
2874 2875
		ADJUST_ARGS();
	}
2876
	return nfserr;
L
Linus Torvalds 已提交
2877 2878 2879
}


2880
static __be32
2881
nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
L
Linus Torvalds 已提交
2882
{
2883
	__be32 *p;
L
Linus Torvalds 已提交
2884 2885 2886 2887

	if (nfserr)
		goto out;

2888 2889
	nfsd4_encode_stateid(resp, &open->op_stateid);
	RESERVE_SPACE(40);
J
J. Bruce Fields 已提交
2890
	write_cinfo(&p, &open->op_cinfo);
L
Linus Torvalds 已提交
2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901
	WRITE32(open->op_rflags);
	WRITE32(2);
	WRITE32(open->op_bmval[0]);
	WRITE32(open->op_bmval[1]);
	WRITE32(open->op_delegate_type);
	ADJUST_ARGS();

	switch (open->op_delegate_type) {
	case NFS4_OPEN_DELEGATE_NONE:
		break;
	case NFS4_OPEN_DELEGATE_READ:
2902 2903
		nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
		RESERVE_SPACE(20);
2904
		WRITE32(open->op_recall);
L
Linus Torvalds 已提交
2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915

		/*
		 * TODO: ACE's in delegations
		 */
		WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
		WRITE32(0);
		WRITE32(0);
		WRITE32(0);   /* XXX: is NULL principal ok? */
		ADJUST_ARGS();
		break;
	case NFS4_OPEN_DELEGATE_WRITE:
2916 2917
		nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
		RESERVE_SPACE(32);
L
Linus Torvalds 已提交
2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935
		WRITE32(0);

		/*
		 * TODO: space_limit's in delegations
		 */
		WRITE32(NFS4_LIMIT_SIZE);
		WRITE32(~(u32)0);
		WRITE32(~(u32)0);

		/*
		 * TODO: ACE's in delegations
		 */
		WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
		WRITE32(0);
		WRITE32(0);
		WRITE32(0);   /* XXX: is NULL principal ok? */
		ADJUST_ARGS();
		break;
2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949
	case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
		switch (open->op_why_no_deleg) {
		case WND4_CONTENTION:
		case WND4_RESOURCE:
			RESERVE_SPACE(8);
			WRITE32(open->op_why_no_deleg);
			WRITE32(0);	/* deleg signaling not supported yet */
			break;
		default:
			RESERVE_SPACE(4);
			WRITE32(open->op_why_no_deleg);
		}
		ADJUST_ARGS();
		break;
L
Linus Torvalds 已提交
2950 2951 2952 2953 2954
	default:
		BUG();
	}
	/* XXX save filehandle here */
out:
2955
	return nfserr;
L
Linus Torvalds 已提交
2956 2957
}

2958
static __be32
2959
nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
L
Linus Torvalds 已提交
2960
{
2961 2962
	if (!nfserr)
		nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
L
Linus Torvalds 已提交
2963

2964
	return nfserr;
L
Linus Torvalds 已提交
2965 2966
}

2967
static __be32
2968
nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
L
Linus Torvalds 已提交
2969
{
2970 2971
	if (!nfserr)
		nfsd4_encode_stateid(resp, &od->od_stateid);
L
Linus Torvalds 已提交
2972

2973
	return nfserr;
L
Linus Torvalds 已提交
2974 2975
}

2976 2977
static __be32
nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2978
		  struct nfsd4_read *read)
L
Linus Torvalds 已提交
2979 2980
{
	u32 eof;
2981 2982
	int v;
	struct page *page;
L
Linus Torvalds 已提交
2983 2984
	unsigned long maxcount; 
	long len;
2985
	__be32 *p;
L
Linus Torvalds 已提交
2986 2987 2988 2989 2990 2991 2992 2993

	if (nfserr)
		return nfserr;
	if (resp->xbuf->page_len)
		return nfserr_resource;

	RESERVE_SPACE(8); /* eof flag and byte count */

2994
	maxcount = svc_max_payload(resp->rqstp);
L
Linus Torvalds 已提交
2995 2996 2997 2998 2999 3000
	if (maxcount > read->rd_length)
		maxcount = read->rd_length;

	len = maxcount;
	v = 0;
	while (len > 0) {
3001 3002
		page = *(resp->rqstp->rq_next_page);
		if (!page) { /* ran out of pages */
3003 3004 3005
			maxcount -= len;
			break;
		}
3006
		resp->rqstp->rq_vec[v].iov_base = page_address(page);
3007
		resp->rqstp->rq_vec[v].iov_len =
3008
			len < PAGE_SIZE ? len : PAGE_SIZE;
3009
		resp->rqstp->rq_next_page++;
L
Linus Torvalds 已提交
3010 3011 3012 3013 3014
		v++;
		len -= PAGE_SIZE;
	}
	read->rd_vlen = v;

3015
	nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3016
			read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
L
Linus Torvalds 已提交
3017 3018 3019 3020
			&maxcount);

	if (nfserr)
		return nfserr;
3021 3022
	eof = (read->rd_offset + maxcount >=
	       read->rd_fhp->fh_dentry->d_inode->i_size);
L
Linus Torvalds 已提交
3023 3024 3025 3026

	WRITE32(eof);
	WRITE32(maxcount);
	ADJUST_ARGS();
3027 3028
	resp->xbuf->head[0].iov_len = (char*)p
					- (char*)resp->xbuf->head[0].iov_base;
L
Linus Torvalds 已提交
3029 3030
	resp->xbuf->page_len = maxcount;

3031 3032
	/* Use rest of head for padding and remaining ops: */
	resp->xbuf->tail[0].iov_base = p;
L
Linus Torvalds 已提交
3033 3034
	resp->xbuf->tail[0].iov_len = 0;
	if (maxcount&3) {
3035 3036
		RESERVE_SPACE(4);
		WRITE32(0);
L
Linus Torvalds 已提交
3037 3038
		resp->xbuf->tail[0].iov_base += maxcount&3;
		resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
3039
		ADJUST_ARGS();
L
Linus Torvalds 已提交
3040 3041 3042 3043
	}
	return 0;
}

3044 3045
static __be32
nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
L
Linus Torvalds 已提交
3046 3047 3048
{
	int maxcount;
	char *page;
3049
	__be32 *p;
L
Linus Torvalds 已提交
3050 3051 3052 3053 3054

	if (nfserr)
		return nfserr;
	if (resp->xbuf->page_len)
		return nfserr_resource;
3055
	if (!*resp->rqstp->rq_next_page)
3056
		return nfserr_resource;
L
Linus Torvalds 已提交
3057

3058
	page = page_address(*(resp->rqstp->rq_next_page++));
L
Linus Torvalds 已提交
3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076

	maxcount = PAGE_SIZE;
	RESERVE_SPACE(4);

	/*
	 * XXX: By default, the ->readlink() VFS op will truncate symlinks
	 * if they would overflow the buffer.  Is this kosher in NFSv4?  If
	 * not, one easy fix is: if ->readlink() precisely fills the buffer,
	 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
	 */
	nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
	if (nfserr == nfserr_isdir)
		return nfserr_inval;
	if (nfserr)
		return nfserr;

	WRITE32(maxcount);
	ADJUST_ARGS();
3077 3078 3079
	resp->xbuf->head[0].iov_len = (char*)p
				- (char*)resp->xbuf->head[0].iov_base;
	resp->xbuf->page_len = maxcount;
L
Linus Torvalds 已提交
3080

3081 3082
	/* Use rest of head for padding and remaining ops: */
	resp->xbuf->tail[0].iov_base = p;
L
Linus Torvalds 已提交
3083 3084
	resp->xbuf->tail[0].iov_len = 0;
	if (maxcount&3) {
3085 3086
		RESERVE_SPACE(4);
		WRITE32(0);
L
Linus Torvalds 已提交
3087 3088
		resp->xbuf->tail[0].iov_base += maxcount&3;
		resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
3089
		ADJUST_ARGS();
L
Linus Torvalds 已提交
3090 3091 3092 3093
	}
	return 0;
}

3094 3095
static __be32
nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
L
Linus Torvalds 已提交
3096 3097 3098
{
	int maxcount;
	loff_t offset;
A
Al Viro 已提交
3099
	__be32 *page, *savep, *tailbase;
3100
	__be32 *p;
L
Linus Torvalds 已提交
3101 3102 3103 3104 3105

	if (nfserr)
		return nfserr;
	if (resp->xbuf->page_len)
		return nfserr_resource;
3106
	if (!*resp->rqstp->rq_next_page)
3107
		return nfserr_resource;
L
Linus Torvalds 已提交
3108

3109
	RESERVE_SPACE(NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
3110 3111 3112 3113 3114 3115 3116
	savep = p;

	/* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
	WRITE32(0);
	WRITE32(0);
	ADJUST_ARGS();
	resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
3117
	tailbase = p;
L
Linus Torvalds 已提交
3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133

	maxcount = PAGE_SIZE;
	if (maxcount > readdir->rd_maxcount)
		maxcount = readdir->rd_maxcount;

	/*
	 * Convert from bytes to words, account for the two words already
	 * written, make sure to leave two words at the end for the next
	 * pointer and eof field.
	 */
	maxcount = (maxcount >> 2) - 4;
	if (maxcount < 0) {
		nfserr =  nfserr_toosmall;
		goto err_no_verf;
	}

3134
	page = page_address(*(resp->rqstp->rq_next_page++));
L
Linus Torvalds 已提交
3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156
	readdir->common.err = 0;
	readdir->buflen = maxcount;
	readdir->buffer = page;
	readdir->offset = NULL;

	offset = readdir->rd_cookie;
	nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
			      &offset,
			      &readdir->common, nfsd4_encode_dirent);
	if (nfserr == nfs_ok &&
	    readdir->common.err == nfserr_toosmall &&
	    readdir->buffer == page) 
		nfserr = nfserr_toosmall;
	if (nfserr)
		goto err_no_verf;

	if (readdir->offset)
		xdr_encode_hyper(readdir->offset, offset);

	p = readdir->buffer;
	*p++ = 0;	/* no more entries */
	*p++ = htonl(readdir->common.err == nfserr_eof);
3157 3158
	resp->xbuf->page_len = ((char*)p) -
		(char*)page_address(*(resp->rqstp->rq_next_page-1));
L
Linus Torvalds 已提交
3159

3160 3161
	/* Use rest of head for padding and remaining ops: */
	resp->xbuf->tail[0].iov_base = tailbase;
L
Linus Torvalds 已提交
3162 3163
	resp->xbuf->tail[0].iov_len = 0;
	resp->p = resp->xbuf->tail[0].iov_base;
3164
	resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
L
Linus Torvalds 已提交
3165 3166 3167 3168 3169 3170 3171 3172

	return 0;
err_no_verf:
	p = savep;
	ADJUST_ARGS();
	return nfserr;
}

3173
static __be32
3174
nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
L
Linus Torvalds 已提交
3175
{
3176
	__be32 *p;
L
Linus Torvalds 已提交
3177 3178 3179

	if (!nfserr) {
		RESERVE_SPACE(20);
J
J. Bruce Fields 已提交
3180
		write_cinfo(&p, &remove->rm_cinfo);
L
Linus Torvalds 已提交
3181 3182
		ADJUST_ARGS();
	}
3183
	return nfserr;
L
Linus Torvalds 已提交
3184 3185
}

3186
static __be32
3187
nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
L
Linus Torvalds 已提交
3188
{
3189
	__be32 *p;
L
Linus Torvalds 已提交
3190 3191 3192

	if (!nfserr) {
		RESERVE_SPACE(40);
J
J. Bruce Fields 已提交
3193 3194
		write_cinfo(&p, &rename->rn_sinfo);
		write_cinfo(&p, &rename->rn_tinfo);
L
Linus Torvalds 已提交
3195 3196
		ADJUST_ARGS();
	}
3197
	return nfserr;
L
Linus Torvalds 已提交
3198 3199
}

3200
static __be32
3201
nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
3202
			 __be32 nfserr, struct svc_export *exp)
A
Andy Adamson 已提交
3203
{
3204
	u32 i, nflavs, supported;
3205 3206
	struct exp_flavor_info *flavs;
	struct exp_flavor_info def_flavs[2];
3207 3208
	__be32 *p, *flavorsp;
	static bool report = true;
A
Andy Adamson 已提交
3209 3210 3211

	if (nfserr)
		goto out;
3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231
	if (exp->ex_nflavors) {
		flavs = exp->ex_flavors;
		nflavs = exp->ex_nflavors;
	} else { /* Handling of some defaults in absence of real secinfo: */
		flavs = def_flavs;
		if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
			nflavs = 2;
			flavs[0].pseudoflavor = RPC_AUTH_UNIX;
			flavs[1].pseudoflavor = RPC_AUTH_NULL;
		} else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
			nflavs = 1;
			flavs[0].pseudoflavor
					= svcauth_gss_flavor(exp->ex_client);
		} else {
			nflavs = 1;
			flavs[0].pseudoflavor
					= exp->ex_client->flavour->flavour;
		}
	}

3232
	supported = 0;
A
Andy Adamson 已提交
3233
	RESERVE_SPACE(4);
3234
	flavorsp = p++;		/* to be backfilled later */
A
Andy Adamson 已提交
3235
	ADJUST_ARGS();
3236

3237
	for (i = 0; i < nflavs; i++) {
3238
		rpc_authflavor_t pf = flavs[i].pseudoflavor;
3239
		struct rpcsec_gss_info info;
A
Andy Adamson 已提交
3240

3241 3242
		if (rpcauth_get_gssinfo(pf, &info) == 0) {
			supported++;
3243
			RESERVE_SPACE(4 + 4 + XDR_LEN(info.oid.len) + 4 + 4);
A
Andy Adamson 已提交
3244
			WRITE32(RPC_AUTH_GSS);
3245 3246 3247 3248
			WRITE32(info.oid.len);
			WRITEMEM(info.oid.data, info.oid.len);
			WRITE32(info.qop);
			WRITE32(info.service);
A
Andy Adamson 已提交
3249
			ADJUST_ARGS();
3250 3251
		} else if (pf < RPC_AUTH_MAXFLAVOR) {
			supported++;
A
Andy Adamson 已提交
3252
			RESERVE_SPACE(4);
3253
			WRITE32(pf);
A
Andy Adamson 已提交
3254
			ADJUST_ARGS();
3255 3256 3257 3258
		} else {
			if (report)
				pr_warn("NFS: SECINFO: security flavor %u "
					"is not supported\n", pf);
A
Andy Adamson 已提交
3259 3260
		}
	}
3261

3262 3263 3264 3265
	if (nflavs != supported)
		report = false;
	*flavorsp = htonl(supported);

A
Andy Adamson 已提交
3266 3267 3268
out:
	if (exp)
		exp_put(exp);
3269
	return nfserr;
A
Andy Adamson 已提交
3270 3271
}

3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285
static __be32
nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
		     struct nfsd4_secinfo *secinfo)
{
	return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
}

static __be32
nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
		     struct nfsd4_secinfo_no_name *secinfo)
{
	return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
}

L
Linus Torvalds 已提交
3286 3287 3288 3289
/*
 * The SETATTR encode routine is special -- it always encodes a bitmap,
 * regardless of the error status.
 */
3290
static __be32
3291
nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
L
Linus Torvalds 已提交
3292
{
3293
	__be32 *p;
L
Linus Torvalds 已提交
3294

3295
	RESERVE_SPACE(16);
L
Linus Torvalds 已提交
3296
	if (nfserr) {
3297 3298
		WRITE32(3);
		WRITE32(0);
L
Linus Torvalds 已提交
3299 3300 3301 3302
		WRITE32(0);
		WRITE32(0);
	}
	else {
3303
		WRITE32(3);
L
Linus Torvalds 已提交
3304 3305
		WRITE32(setattr->sa_bmval[0]);
		WRITE32(setattr->sa_bmval[1]);
3306
		WRITE32(setattr->sa_bmval[2]);
L
Linus Torvalds 已提交
3307 3308
	}
	ADJUST_ARGS();
3309
	return nfserr;
L
Linus Torvalds 已提交
3310 3311
}

3312
static __be32
3313
nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
L
Linus Torvalds 已提交
3314
{
3315
	__be32 *p;
L
Linus Torvalds 已提交
3316 3317

	if (!nfserr) {
3318
		RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
3319
		WRITEMEM(&scd->se_clientid, 8);
3320
		WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
3321 3322 3323 3324 3325 3326 3327 3328
		ADJUST_ARGS();
	}
	else if (nfserr == nfserr_clid_inuse) {
		RESERVE_SPACE(8);
		WRITE32(0);
		WRITE32(0);
		ADJUST_ARGS();
	}
3329
	return nfserr;
L
Linus Torvalds 已提交
3330 3331
}

3332
static __be32
3333
nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
L
Linus Torvalds 已提交
3334
{
3335
	__be32 *p;
L
Linus Torvalds 已提交
3336 3337 3338 3339 3340

	if (!nfserr) {
		RESERVE_SPACE(16);
		WRITE32(write->wr_bytes_written);
		WRITE32(write->wr_how_written);
3341
		WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
3342 3343
		ADJUST_ARGS();
	}
3344
	return nfserr;
L
Linus Torvalds 已提交
3345 3346
}

3347 3348 3349 3350 3351 3352 3353 3354
static const u32 nfs4_minimal_spo_must_enforce[2] = {
	[1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
	      1 << (OP_EXCHANGE_ID - 32) |
	      1 << (OP_CREATE_SESSION - 32) |
	      1 << (OP_DESTROY_SESSION - 32) |
	      1 << (OP_DESTROY_CLIENTID - 32)
};

A
Andy Adamson 已提交
3355
static __be32
J
J. Bruce Fields 已提交
3356
nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
A
Andy Adamson 已提交
3357 3358
			 struct nfsd4_exchange_id *exid)
{
3359
	__be32 *p;
A
Andy Adamson 已提交
3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377
	char *major_id;
	char *server_scope;
	int major_id_sz;
	int server_scope_sz;
	uint64_t minor_id = 0;

	if (nfserr)
		return nfserr;

	major_id = utsname()->nodename;
	major_id_sz = strlen(major_id);
	server_scope = utsname()->nodename;
	server_scope_sz = strlen(server_scope);

	RESERVE_SPACE(
		8 /* eir_clientid */ +
		4 /* eir_sequenceid */ +
		4 /* eir_flags */ +
3378
		4 /* spr_how */);
A
Andy Adamson 已提交
3379 3380 3381 3382 3383 3384

	WRITEMEM(&exid->clientid, 8);
	WRITE32(exid->seqid);
	WRITE32(exid->flags);

	WRITE32(exid->spa_how);
3385 3386
	ADJUST_ARGS();

3387 3388 3389 3390
	switch (exid->spa_how) {
	case SP4_NONE:
		break;
	case SP4_MACH_CRED:
3391 3392 3393
		/* spo_must_enforce, spo_must_allow */
		RESERVE_SPACE(16);

3394 3395 3396 3397 3398 3399
		/* spo_must_enforce bitmap: */
		WRITE32(2);
		WRITE32(nfs4_minimal_spo_must_enforce[0]);
		WRITE32(nfs4_minimal_spo_must_enforce[1]);
		/* empty spo_must_allow bitmap: */
		WRITE32(0);
3400 3401

		ADJUST_ARGS();
3402 3403 3404 3405
		break;
	default:
		WARN_ON_ONCE(1);
	}
A
Andy Adamson 已提交
3406

3407 3408 3409 3410 3411 3412 3413 3414
	RESERVE_SPACE(
		8 /* so_minor_id */ +
		4 /* so_major_id.len */ +
		(XDR_QUADLEN(major_id_sz) * 4) +
		4 /* eir_server_scope.len */ +
		(XDR_QUADLEN(server_scope_sz) * 4) +
		4 /* eir_server_impl_id.count (0) */);

A
Andy Adamson 已提交
3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428
	/* The server_owner struct */
	WRITE64(minor_id);      /* Minor id */
	/* major id */
	WRITE32(major_id_sz);
	WRITEMEM(major_id, major_id_sz);

	/* Server scope */
	WRITE32(server_scope_sz);
	WRITEMEM(server_scope, server_scope_sz);

	/* Implementation id */
	WRITE32(0);	/* zero length nfs_impl_id4 array */
	ADJUST_ARGS();
	return 0;
A
Andy Adamson 已提交
3429 3430 3431
}

static __be32
J
J. Bruce Fields 已提交
3432
nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
A
Andy Adamson 已提交
3433 3434
			    struct nfsd4_create_session *sess)
{
3435
	__be32 *p;
A
Andy Adamson 已提交
3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477

	if (nfserr)
		return nfserr;

	RESERVE_SPACE(24);
	WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
	WRITE32(sess->seqid);
	WRITE32(sess->flags);
	ADJUST_ARGS();

	RESERVE_SPACE(28);
	WRITE32(0); /* headerpadsz */
	WRITE32(sess->fore_channel.maxreq_sz);
	WRITE32(sess->fore_channel.maxresp_sz);
	WRITE32(sess->fore_channel.maxresp_cached);
	WRITE32(sess->fore_channel.maxops);
	WRITE32(sess->fore_channel.maxreqs);
	WRITE32(sess->fore_channel.nr_rdma_attrs);
	ADJUST_ARGS();

	if (sess->fore_channel.nr_rdma_attrs) {
		RESERVE_SPACE(4);
		WRITE32(sess->fore_channel.rdma_attrs);
		ADJUST_ARGS();
	}

	RESERVE_SPACE(28);
	WRITE32(0); /* headerpadsz */
	WRITE32(sess->back_channel.maxreq_sz);
	WRITE32(sess->back_channel.maxresp_sz);
	WRITE32(sess->back_channel.maxresp_cached);
	WRITE32(sess->back_channel.maxops);
	WRITE32(sess->back_channel.maxreqs);
	WRITE32(sess->back_channel.nr_rdma_attrs);
	ADJUST_ARGS();

	if (sess->back_channel.nr_rdma_attrs) {
		RESERVE_SPACE(4);
		WRITE32(sess->back_channel.rdma_attrs);
		ADJUST_ARGS();
	}
	return 0;
A
Andy Adamson 已提交
3478 3479
}

D
Daniel Mack 已提交
3480
static __be32
J
J. Bruce Fields 已提交
3481
nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
A
Andy Adamson 已提交
3482 3483
		      struct nfsd4_sequence *seq)
{
3484
	__be32 *p;
B
Benny Halevy 已提交
3485 3486 3487 3488 3489 3490 3491 3492

	if (nfserr)
		return nfserr;

	RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
	WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
	WRITE32(seq->seqid);
	WRITE32(seq->slotid);
3493 3494 3495
	/* Note slotid's are numbered from zero: */
	WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
	WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
3496
	WRITE32(seq->status_flags);
B
Benny Halevy 已提交
3497 3498

	ADJUST_ARGS();
3499
	resp->cstate.datap = p; /* DRC cache data pointer */
B
Benny Halevy 已提交
3500
	return 0;
A
Andy Adamson 已提交
3501 3502
}

J
J. Bruce Fields 已提交
3503
static __be32
J
J. Bruce Fields 已提交
3504
nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
3505 3506
			  struct nfsd4_test_stateid *test_stateid)
{
3507
	struct nfsd4_test_stateid_id *stateid, *next;
3508 3509
	__be32 *p;

3510
	RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids));
3511 3512
	*p++ = htonl(test_stateid->ts_num_ids);

3513
	list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
3514
		*p++ = stateid->ts_id_status;
3515 3516
	}

3517
	ADJUST_ARGS();
3518 3519 3520
	return nfserr;
}

3521 3522 3523 3524 3525 3526 3527 3528
static __be32
nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
{
	return nfserr;
}

typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);

A
Andy Adamson 已提交
3529 3530 3531 3532 3533
/*
 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
 * since we don't need to filter out obsolete ops as this is
 * done in the decoding phase.
 */
3534
static nfsd4_enc nfsd4_enc_ops[] = {
3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550
	[OP_ACCESS]		= (nfsd4_enc)nfsd4_encode_access,
	[OP_CLOSE]		= (nfsd4_enc)nfsd4_encode_close,
	[OP_COMMIT]		= (nfsd4_enc)nfsd4_encode_commit,
	[OP_CREATE]		= (nfsd4_enc)nfsd4_encode_create,
	[OP_DELEGPURGE]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_DELEGRETURN]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_GETATTR]		= (nfsd4_enc)nfsd4_encode_getattr,
	[OP_GETFH]		= (nfsd4_enc)nfsd4_encode_getfh,
	[OP_LINK]		= (nfsd4_enc)nfsd4_encode_link,
	[OP_LOCK]		= (nfsd4_enc)nfsd4_encode_lock,
	[OP_LOCKT]		= (nfsd4_enc)nfsd4_encode_lockt,
	[OP_LOCKU]		= (nfsd4_enc)nfsd4_encode_locku,
	[OP_LOOKUP]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_LOOKUPP]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_NVERIFY]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_OPEN]		= (nfsd4_enc)nfsd4_encode_open,
3551
	[OP_OPENATTR]		= (nfsd4_enc)nfsd4_encode_noop,
3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571
	[OP_OPEN_CONFIRM]	= (nfsd4_enc)nfsd4_encode_open_confirm,
	[OP_OPEN_DOWNGRADE]	= (nfsd4_enc)nfsd4_encode_open_downgrade,
	[OP_PUTFH]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_PUTPUBFH]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_PUTROOTFH]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_READ]		= (nfsd4_enc)nfsd4_encode_read,
	[OP_READDIR]		= (nfsd4_enc)nfsd4_encode_readdir,
	[OP_READLINK]		= (nfsd4_enc)nfsd4_encode_readlink,
	[OP_REMOVE]		= (nfsd4_enc)nfsd4_encode_remove,
	[OP_RENAME]		= (nfsd4_enc)nfsd4_encode_rename,
	[OP_RENEW]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_RESTOREFH]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_SAVEFH]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_SECINFO]		= (nfsd4_enc)nfsd4_encode_secinfo,
	[OP_SETATTR]		= (nfsd4_enc)nfsd4_encode_setattr,
	[OP_SETCLIENTID]	= (nfsd4_enc)nfsd4_encode_setclientid,
	[OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
	[OP_VERIFY]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_WRITE]		= (nfsd4_enc)nfsd4_encode_write,
	[OP_RELEASE_LOCKOWNER]	= (nfsd4_enc)nfsd4_encode_noop,
A
Andy Adamson 已提交
3572 3573 3574

	/* NFSv4.1 operations */
	[OP_BACKCHANNEL_CTL]	= (nfsd4_enc)nfsd4_encode_noop,
3575
	[OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
A
Andy Adamson 已提交
3576 3577
	[OP_EXCHANGE_ID]	= (nfsd4_enc)nfsd4_encode_exchange_id,
	[OP_CREATE_SESSION]	= (nfsd4_enc)nfsd4_encode_create_session,
3578 3579
	[OP_DESTROY_SESSION]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_FREE_STATEID]	= (nfsd4_enc)nfsd4_encode_noop,
A
Andy Adamson 已提交
3580 3581 3582 3583 3584 3585
	[OP_GET_DIR_DELEGATION]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_GETDEVICEINFO]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_GETDEVICELIST]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_LAYOUTCOMMIT]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_LAYOUTGET]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_LAYOUTRETURN]	= (nfsd4_enc)nfsd4_encode_noop,
3586
	[OP_SECINFO_NO_NAME]	= (nfsd4_enc)nfsd4_encode_secinfo_no_name,
A
Andy Adamson 已提交
3587 3588
	[OP_SEQUENCE]		= (nfsd4_enc)nfsd4_encode_sequence,
	[OP_SET_SSV]		= (nfsd4_enc)nfsd4_encode_noop,
3589
	[OP_TEST_STATEID]	= (nfsd4_enc)nfsd4_encode_test_stateid,
A
Andy Adamson 已提交
3590 3591 3592
	[OP_WANT_DELEGATION]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_DESTROY_CLIENTID]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_RECLAIM_COMPLETE]	= (nfsd4_enc)nfsd4_encode_noop,
3593 3594
};

3595 3596
/*
 * Calculate the total amount of memory that the compound response has taken
3597
 * after encoding the current operation with pad.
3598
 *
3599 3600
 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
 *      which was specified at nfsd4_operation, else pad is zero.
3601
 *
3602
 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
3603 3604 3605 3606
 *
 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
 * will be at least a page and will therefore hold the xdr_buf head.
 */
J
J. Bruce Fields 已提交
3607
__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
3608 3609 3610 3611
{
	struct xdr_buf *xb = &resp->rqstp->rq_res;
	struct nfsd4_session *session = NULL;
	struct nfsd4_slot *slot = resp->cstate.slot;
3612
	u32 length, tlen = 0;
3613 3614

	if (!nfsd4_has_session(&resp->cstate))
3615
		return 0;
3616 3617

	session = resp->cstate.session;
3618 3619
	if (session == NULL)
		return 0;
3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631

	if (xb->page_len == 0) {
		length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
	} else {
		if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
			tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;

		length = xb->head[0].iov_len + xb->page_len + tlen + pad;
	}
	dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
		length, xb->page_len, tlen, pad);

3632 3633 3634
	if (length > session->se_fchannel.maxresp_sz)
		return nfserr_rep_too_big;

3635
	if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) &&
3636
	    length > session->se_fchannel.maxresp_cached)
3637
		return nfserr_rep_too_big_to_cache;
3638 3639

	return 0;
3640 3641
}

L
Linus Torvalds 已提交
3642 3643 3644
void
nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
{
3645
	struct nfs4_stateowner *so = resp->cstate.replay_owner;
A
Al Viro 已提交
3646
	__be32 *statp;
3647
	__be32 *p;
L
Linus Torvalds 已提交
3648 3649 3650 3651 3652 3653

	RESERVE_SPACE(8);
	WRITE32(op->opnum);
	statp = p++;	/* to be backfilled at the end */
	ADJUST_ARGS();

3654 3655 3656 3657 3658
	if (op->opnum == OP_ILLEGAL)
		goto status;
	BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
	       !nfsd4_enc_ops[op->opnum]);
	op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3659
	/* nfsd4_check_drc_limit guarantees enough room for error status */
3660 3661
	if (!op->status)
		op->status = nfsd4_check_resp_size(resp, 0);
3662 3663 3664 3665 3666
	if (so) {
		so->so_replay.rp_status = op->status;
		so->so_replay.rp_buflen = (char *)resp->p - (char *)(statp+1);
		memcpy(so->so_replay.rp_buf, statp+1, so->so_replay.rp_buflen);
	}
3667
status:
L
Linus Torvalds 已提交
3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685
	/*
	 * Note: We write the status directly, instead of using WRITE32(),
	 * since it is already in network byte order.
	 */
	*statp = op->status;
}

/* 
 * Encode the reply stored in the stateowner reply cache 
 * 
 * XDR note: do not encode rp->rp_buflen: the buffer contains the
 * previously sent already encoded operation.
 *
 * called with nfs4_lock_state() held
 */
void
nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
{
3686
	__be32 *p;
L
Linus Torvalds 已提交
3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701
	struct nfs4_replay *rp = op->replay;

	BUG_ON(!rp);

	RESERVE_SPACE(8);
	WRITE32(op->opnum);
	*p++ = rp->rp_status;  /* already xdr'ed */
	ADJUST_ARGS();

	RESERVE_SPACE(rp->rp_buflen);
	WRITEMEM(rp->rp_buf, rp->rp_buflen);
	ADJUST_ARGS();
}

int
A
Al Viro 已提交
3702
nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
L
Linus Torvalds 已提交
3703 3704 3705 3706
{
        return xdr_ressize_check(rqstp, p);
}

3707
int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
L
Linus Torvalds 已提交
3708
{
3709 3710 3711
	struct svc_rqst *rqstp = rq;
	struct nfsd4_compoundargs *args = rqstp->rq_argp;

L
Linus Torvalds 已提交
3712 3713 3714 3715
	if (args->ops != args->iops) {
		kfree(args->ops);
		args->ops = args->iops;
	}
J
Jesper Juhl 已提交
3716 3717
	kfree(args->tmpp);
	args->tmpp = NULL;
L
Linus Torvalds 已提交
3718 3719 3720 3721 3722 3723
	while (args->to_free) {
		struct tmpbuf *tb = args->to_free;
		args->to_free = tb->next;
		tb->release(tb->buf);
		kfree(tb);
	}
3724
	return 1;
L
Linus Torvalds 已提交
3725 3726 3727
}

int
A
Al Viro 已提交
3728
nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
L
Linus Torvalds 已提交
3729 3730 3731 3732 3733 3734 3735 3736 3737 3738
{
	args->p = p;
	args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
	args->pagelist = rqstp->rq_arg.pages;
	args->pagelen = rqstp->rq_arg.page_len;
	args->tmpp = NULL;
	args->to_free = NULL;
	args->ops = args->iops;
	args->rqstp = rqstp;

3739
	return !nfsd4_decode_compound(args);
L
Linus Torvalds 已提交
3740 3741 3742
}

int
A
Al Viro 已提交
3743
nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
L
Linus Torvalds 已提交
3744 3745 3746 3747
{
	/*
	 * All that remains is to write the tag and operation count...
	 */
3748
	struct nfsd4_compound_state *cs = &resp->cstate;
L
Linus Torvalds 已提交
3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761
	struct kvec *iov;
	p = resp->tagp;
	*p++ = htonl(resp->taglen);
	memcpy(p, resp->tag, resp->taglen);
	p += XDR_QUADLEN(resp->taglen);
	*p++ = htonl(resp->opcnt);

	if (rqstp->rq_res.page_len) 
		iov = &rqstp->rq_res.tail[0];
	else
		iov = &rqstp->rq_res.head[0];
	iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
	BUG_ON(iov->iov_len > PAGE_SIZE);
3762
	if (nfsd4_has_session(cs)) {
3763 3764
		struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
		struct nfs4_client *clp = cs->session->se_client;
3765 3766
		if (cs->status != nfserr_replay_cache) {
			nfsd4_store_cache_entry(resp);
3767
			cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
3768
		}
3769
		/* Renew the clientid on success and on replay */
3770
		spin_lock(&nn->client_lock);
3771
		nfsd4_put_session(cs->session);
3772 3773
		spin_unlock(&nn->client_lock);
		put_client_renew(clp);
A
Andy Adamson 已提交
3774
	}
L
Linus Torvalds 已提交
3775 3776 3777 3778 3779 3780 3781 3782
	return 1;
}

/*
 * Local variables:
 *  c-basic-offset: 8
 * End:
 */