1// SPDX-License-Identifier: GPL-2.0-or-later
   2/* AFS File Server client stubs
   3 *
   4 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
   5 * Written by David Howells (dhowells@redhat.com)
 
 
 
 
 
   6 */
   7
   8#include <linux/init.h>
   9#include <linux/slab.h>
  10#include <linux/sched.h>
  11#include <linux/circ_buf.h>
  12#include <linux/iversion.h>
  13#include <linux/netfs.h>
  14#include "internal.h"
  15#include "afs_fs.h"
  16#include "xdr_fs.h"
  17
  18/*
  19 * decode an AFSFid block
  20 */
  21static void xdr_decode_AFSFid(const __be32 **_bp, struct afs_fid *fid)
  22{
  23	const __be32 *bp = *_bp;
  24
  25	fid->vid		= ntohl(*bp++);
  26	fid->vnode		= ntohl(*bp++);
  27	fid->unique		= ntohl(*bp++);
  28	*_bp = bp;
  29}
  30
  31/*
  32 * Dump a bad file status record.
  33 */
  34static void xdr_dump_bad(const __be32 *bp)
  35{
  36	__be32 x[4];
  37	int i;
  38
  39	pr_notice("AFS XDR: Bad status record\n");
  40	for (i = 0; i < 5 * 4 * 4; i += 16) {
  41		memcpy(x, bp, 16);
  42		bp += 4;
  43		pr_notice("%03x: %08x %08x %08x %08x\n",
  44			  i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
  45	}
  46
  47	memcpy(x, bp, 4);
  48	pr_notice("0x50: %08x\n", ntohl(x[0]));
  49}
  50
  51/*
  52 * decode an AFSFetchStatus block
  53 */
  54static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
  55				      struct afs_call *call,
  56				      struct afs_status_cb *scb)
 
  57{
  58	const struct afs_xdr_AFSFetchStatus *xdr = (const void *)*_bp;
  59	struct afs_file_status *status = &scb->status;
  60	bool inline_error = (call->operation_ID == afs_FS_InlineBulkStatus);
  61	u64 data_version, size;
  62	u32 type, abort_code;
  63
  64	abort_code = ntohl(xdr->abort_code);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  65
  66	if (xdr->if_version != htonl(AFS_FSTATUS_VERSION)) {
  67		if (xdr->if_version == htonl(0) &&
  68		    abort_code != 0 &&
  69		    inline_error) {
  70			/* The OpenAFS fileserver has a bug in FS.InlineBulkStatus
  71			 * whereby it doesn't set the interface version in the error
  72			 * case.
  73			 */
  74			status->abort_code = abort_code;
  75			scb->have_error = true;
  76			goto advance;
 
 
 
 
 
 
 
 
 
 
 
 
 
  77		}
  78
  79		pr_warn("Unknown AFSFetchStatus version %u\n", ntohl(xdr->if_version));
  80		goto bad;
  81	}
  82
  83	if (abort_code != 0 && inline_error) {
  84		status->abort_code = abort_code;
  85		scb->have_error = true;
  86		goto advance;
  87	}
  88
  89	type = ntohl(xdr->type);
  90	switch (type) {
  91	case AFS_FTYPE_FILE:
  92	case AFS_FTYPE_DIR:
  93	case AFS_FTYPE_SYMLINK:
  94		status->type = type;
  95		break;
  96	default:
  97		goto bad;
 
 
  98	}
  99
 100	status->nlink		= ntohl(xdr->nlink);
 101	status->author		= ntohl(xdr->author);
 102	status->owner		= ntohl(xdr->owner);
 103	status->caller_access	= ntohl(xdr->caller_access); /* Ticket dependent */
 104	status->anon_access	= ntohl(xdr->anon_access);
 105	status->mode		= ntohl(xdr->mode) & S_IALLUGO;
 106	status->group		= ntohl(xdr->group);
 107	status->lock_count	= ntohl(xdr->lock_count);
 108
 109	status->mtime_client.tv_sec = ntohl(xdr->mtime_client);
 110	status->mtime_client.tv_nsec = 0;
 111	status->mtime_server.tv_sec = ntohl(xdr->mtime_server);
 112	status->mtime_server.tv_nsec = 0;
 113
 114	size  = (u64)ntohl(xdr->size_lo);
 115	size |= (u64)ntohl(xdr->size_hi) << 32;
 116	status->size = size;
 117
 118	data_version  = (u64)ntohl(xdr->data_version_lo);
 119	data_version |= (u64)ntohl(xdr->data_version_hi) << 32;
 120	status->data_version = data_version;
 121	scb->have_status = true;
 122advance:
 123	*_bp = (const void *)*_bp + sizeof(*xdr);
 124	return;
 125
 126bad:
 127	xdr_dump_bad(*_bp);
 128	afs_protocol_error(call, afs_eproto_bad_status);
 129	goto advance;
 130}
 131
 132static time64_t xdr_decode_expiry(struct afs_call *call, u32 expiry)
 
 
 
 133{
 134	return ktime_divns(call->issue_time, NSEC_PER_SEC) + expiry;
 
 
 
 
 
 
 135}
 136
 137static void xdr_decode_AFSCallBack(const __be32 **_bp,
 138				   struct afs_call *call,
 139				   struct afs_status_cb *scb)
 140{
 141	struct afs_callback *cb = &scb->callback;
 142	const __be32 *bp = *_bp;
 143
 144	bp++; /* version */
 145	cb->expires_at	= xdr_decode_expiry(call, ntohl(*bp++));
 146	bp++; /* type */
 147	scb->have_cb	= true;
 148	*_bp = bp;
 149}
 150
 151/*
 152 * decode an AFSVolSync block
 153 */
 154static void xdr_decode_AFSVolSync(const __be32 **_bp,
 155				  struct afs_volsync *volsync)
 156{
 157	const __be32 *bp = *_bp;
 158	u32 creation;
 159
 160	creation = ntohl(*bp++);
 161	bp++; /* spare2 */
 162	bp++; /* spare3 */
 163	bp++; /* spare4 */
 164	bp++; /* spare5 */
 165	bp++; /* spare6 */
 166	*_bp = bp;
 167
 168	if (volsync)
 169		volsync->creation = creation;
 170}
 171
 172/*
 173 * encode the requested attributes into an AFSStoreStatus block
 174 */
 175static void xdr_encode_AFS_StoreStatus(__be32 **_bp, struct iattr *attr)
 176{
 177	__be32 *bp = *_bp;
 178	u32 mask = 0, mtime = 0, owner = 0, group = 0, mode = 0;
 179
 180	mask = 0;
 181	if (attr->ia_valid & ATTR_MTIME) {
 182		mask |= AFS_SET_MTIME;
 183		mtime = attr->ia_mtime.tv_sec;
 184	}
 185
 186	if (attr->ia_valid & ATTR_UID) {
 187		mask |= AFS_SET_OWNER;
 188		owner = from_kuid(&init_user_ns, attr->ia_uid);
 189	}
 190
 191	if (attr->ia_valid & ATTR_GID) {
 192		mask |= AFS_SET_GROUP;
 193		group = from_kgid(&init_user_ns, attr->ia_gid);
 194	}
 195
 196	if (attr->ia_valid & ATTR_MODE) {
 197		mask |= AFS_SET_MODE;
 198		mode = attr->ia_mode & S_IALLUGO;
 199	}
 200
 201	*bp++ = htonl(mask);
 202	*bp++ = htonl(mtime);
 203	*bp++ = htonl(owner);
 204	*bp++ = htonl(group);
 205	*bp++ = htonl(mode);
 206	*bp++ = 0;		/* segment size */
 207	*_bp = bp;
 208}
 209
 210/*
 211 * decode an AFSFetchVolumeStatus block
 212 */
 213static void xdr_decode_AFSFetchVolumeStatus(const __be32 **_bp,
 214					    struct afs_volume_status *vs)
 215{
 216	const __be32 *bp = *_bp;
 217
 218	vs->vid			= ntohl(*bp++);
 219	vs->parent_id		= ntohl(*bp++);
 220	vs->online		= ntohl(*bp++);
 221	vs->in_service		= ntohl(*bp++);
 222	vs->blessed		= ntohl(*bp++);
 223	vs->needs_salvage	= ntohl(*bp++);
 224	vs->type		= ntohl(*bp++);
 225	vs->min_quota		= ntohl(*bp++);
 226	vs->max_quota		= ntohl(*bp++);
 227	vs->blocks_in_use	= ntohl(*bp++);
 228	vs->part_blocks_avail	= ntohl(*bp++);
 229	vs->part_max_blocks	= ntohl(*bp++);
 230	vs->vol_copy_date	= 0;
 231	vs->vol_backup_date	= 0;
 232	*_bp = bp;
 233}
 234
 235/*
 236 * deliver reply data to an FS.FetchStatus
 237 */
 238static int afs_deliver_fs_fetch_status(struct afs_call *call)
 
 239{
 240	struct afs_operation *op = call->op;
 241	struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
 242	const __be32 *bp;
 243	int ret;
 244
 245	ret = afs_transfer_reply(call);
 246	if (ret < 0)
 247		return ret;
 
 
 
 
 
 248
 249	/* unmarshall the reply once we've received all of it */
 250	bp = call->buffer;
 251	xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
 252	xdr_decode_AFSCallBack(&bp, call, &vp->scb);
 253	xdr_decode_AFSVolSync(&bp, &op->volsync);
 
 254
 255	_leave(" = 0 [done]");
 256	return 0;
 257}
 258
 259/*
 260 * FS.FetchStatus operation type
 261 */
 262static const struct afs_call_type afs_RXFSFetchStatus = {
 263	.name		= "FS.FetchStatus",
 264	.op		= afs_FS_FetchStatus,
 265	.deliver	= afs_deliver_fs_fetch_status,
 
 266	.destructor	= afs_flat_call_destructor,
 267};
 268
 269/*
 270 * fetch the status information for a file
 271 */
 272void afs_fs_fetch_status(struct afs_operation *op)
 
 
 
 
 273{
 274	struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
 275	struct afs_call *call;
 276	__be32 *bp;
 277
 278	_enter(",%x,{%llx:%llu},,",
 279	       key_serial(op->key), vp->fid.vid, vp->fid.vnode);
 280
 281	call = afs_alloc_flat_call(op->net, &afs_RXFSFetchStatus,
 282				   16, (21 + 3 + 6) * 4);
 283	if (!call)
 284		return afs_op_nomem(op);
 
 
 
 
 
 
 285
 286	/* marshall the parameters */
 287	bp = call->request;
 288	bp[0] = htonl(FSFETCHSTATUS);
 289	bp[1] = htonl(vp->fid.vid);
 290	bp[2] = htonl(vp->fid.vnode);
 291	bp[3] = htonl(vp->fid.unique);
 292
 293	call->fid = vp->fid;
 294	trace_afs_make_fs_call(call, &vp->fid);
 295	afs_make_op_call(op, call, GFP_NOFS);
 296}
 297
 298/*
 299 * deliver reply data to an FS.FetchData
 300 */
 301static int afs_deliver_fs_fetch_data(struct afs_call *call)
 
 302{
 303	struct afs_operation *op = call->op;
 304	struct afs_vnode_param *vp = &op->file[0];
 305	struct afs_read *req = op->fetch.req;
 306	const __be32 *bp;
 307	size_t count_before;
 
 308	int ret;
 309
 310	_enter("{%u,%zu,%zu/%llu}",
 311	       call->unmarshall, call->iov_len, iov_iter_count(call->iter),
 312	       req->actual_len);
 313
 314	switch (call->unmarshall) {
 315	case 0:
 316		req->actual_len = 0;
 317		call->unmarshall++;
 318		if (call->operation_ID == FSFETCHDATA64) {
 319			afs_extract_to_tmp64(call);
 320		} else {
 321			call->tmp_u = htonl(0);
 322			afs_extract_to_tmp(call);
 323		}
 324		fallthrough;
 325
 326		/* Extract the returned data length into
 327		 * ->actual_len.  This may indicate more or less data than was
 328		 * requested will be returned.
 329		 */
 330	case 1:
 331		_debug("extract data length");
 332		ret = afs_extract_data(call, true);
 333		if (ret < 0)
 334			return ret;
 335
 336		req->actual_len = be64_to_cpu(call->tmp64);
 337		_debug("DATA length: %llu", req->actual_len);
 338
 339		if (req->actual_len == 0)
 340			goto no_more_data;
 341
 342		call->iter = req->iter;
 343		call->iov_len = min(req->actual_len, req->len);
 
 
 
 344		call->unmarshall++;
 345		fallthrough;
 346
 347		/* extract the returned data */
 
 348	case 2:
 349		count_before = call->iov_len;
 350		_debug("extract data %zu/%llu", count_before, req->actual_len);
 351
 352		ret = afs_extract_data(call, true);
 353		if (req->subreq) {
 354			req->subreq->transferred += count_before - call->iov_len;
 355			netfs_read_subreq_progress(req->subreq, false);
 356		}
 357		if (ret < 0)
 358			return ret;
 359
 360		call->iter = &call->def_iter;
 361		if (req->actual_len <= req->len)
 362			goto no_more_data;
 363
 364		/* Discard any excess data the server gave us */
 365		afs_extract_discard(call, req->actual_len - req->len);
 366		call->unmarshall = 3;
 367		fallthrough;
 368
 
 369	case 3:
 370		_debug("extract discard %zu/%llu",
 371		       iov_iter_count(call->iter), req->actual_len - req->len);
 
 
 
 
 
 
 
 
 
 
 
 372
 373		ret = afs_extract_data(call, true);
 374		if (ret < 0)
 375			return ret;
 376
 377	no_more_data:
 378		call->unmarshall = 4;
 379		afs_extract_to_buf(call, (21 + 3 + 6) * 4);
 380		fallthrough;
 381
 382		/* extract the metadata */
 383	case 4:
 384		ret = afs_extract_data(call, false);
 385		if (ret < 0)
 386			return ret;
 
 
 
 
 387
 388		bp = call->buffer;
 389		xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
 390		xdr_decode_AFSCallBack(&bp, call, &vp->scb);
 391		xdr_decode_AFSVolSync(&bp, &op->volsync);
 392
 393		req->data_version = vp->scb.status.data_version;
 394		req->file_size = vp->scb.status.size;
 395
 
 396		call->unmarshall++;
 397		fallthrough;
 398
 399	case 5:
 
 
 
 400		break;
 401	}
 402
 
 
 
 
 
 
 
 
 
 
 
 403	_leave(" = 0 [done]");
 404	return 0;
 405}
 406
 407/*
 408 * FS.FetchData operation type
 409 */
 410static const struct afs_call_type afs_RXFSFetchData = {
 411	.name		= "FS.FetchData",
 412	.op		= afs_FS_FetchData,
 413	.deliver	= afs_deliver_fs_fetch_data,
 
 414	.destructor	= afs_flat_call_destructor,
 415};
 416
 417static const struct afs_call_type afs_RXFSFetchData64 = {
 418	.name		= "FS.FetchData64",
 419	.op		= afs_FS_FetchData64,
 420	.deliver	= afs_deliver_fs_fetch_data,
 
 421	.destructor	= afs_flat_call_destructor,
 422};
 423
 424/*
 425 * fetch data from a very large file
 426 */
 427static void afs_fs_fetch_data64(struct afs_operation *op)
 
 
 
 
 
 428{
 429	struct afs_vnode_param *vp = &op->file[0];
 430	struct afs_read *req = op->fetch.req;
 431	struct afs_call *call;
 432	__be32 *bp;
 433
 434	_enter("");
 435
 436	call = afs_alloc_flat_call(op->net, &afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4);
 
 
 437	if (!call)
 438		return afs_op_nomem(op);
 
 
 
 
 
 
 
 
 439
 440	/* marshall the parameters */
 441	bp = call->request;
 442	bp[0] = htonl(FSFETCHDATA64);
 443	bp[1] = htonl(vp->fid.vid);
 444	bp[2] = htonl(vp->fid.vnode);
 445	bp[3] = htonl(vp->fid.unique);
 446	bp[4] = htonl(upper_32_bits(req->pos));
 447	bp[5] = htonl(lower_32_bits(req->pos));
 448	bp[6] = 0;
 449	bp[7] = htonl(lower_32_bits(req->len));
 450
 451	call->fid = vp->fid;
 452	trace_afs_make_fs_call(call, &vp->fid);
 453	afs_make_op_call(op, call, GFP_NOFS);
 454}
 455
 456/*
 457 * fetch data from a file
 458 */
 459void afs_fs_fetch_data(struct afs_operation *op)
 
 
 
 
 
 460{
 461	struct afs_vnode_param *vp = &op->file[0];
 462	struct afs_call *call;
 463	struct afs_read *req = op->fetch.req;
 464	__be32 *bp;
 465
 466	if (test_bit(AFS_SERVER_FL_HAS_FS64, &op->server->flags))
 467		return afs_fs_fetch_data64(op);
 
 468
 469	_enter("");
 470
 471	call = afs_alloc_flat_call(op->net, &afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
 472	if (!call)
 473		return afs_op_nomem(op);
 474
 475	req->call_debug_id = call->debug_id;
 
 
 
 
 
 
 476
 477	/* marshall the parameters */
 478	bp = call->request;
 479	bp[0] = htonl(FSFETCHDATA);
 480	bp[1] = htonl(vp->fid.vid);
 481	bp[2] = htonl(vp->fid.vnode);
 482	bp[3] = htonl(vp->fid.unique);
 483	bp[4] = htonl(lower_32_bits(req->pos));
 484	bp[5] = htonl(lower_32_bits(req->len));
 485
 486	call->fid = vp->fid;
 487	trace_afs_make_fs_call(call, &vp->fid);
 488	afs_make_op_call(op, call, GFP_NOFS);
 489}
 490
 491/*
 492 * deliver reply data to an FS.CreateFile or an FS.MakeDir
 493 */
 494static int afs_deliver_fs_create_vnode(struct afs_call *call)
 
 495{
 496	struct afs_operation *op = call->op;
 497	struct afs_vnode_param *dvp = &op->file[0];
 498	struct afs_vnode_param *vp = &op->file[1];
 499	const __be32 *bp;
 500	int ret;
 501
 502	ret = afs_transfer_reply(call);
 503	if (ret < 0)
 504		return ret;
 505
 506	/* unmarshall the reply once we've received all of it */
 507	bp = call->buffer;
 508	xdr_decode_AFSFid(&bp, &op->file[1].fid);
 509	xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
 510	xdr_decode_AFSFetchStatus(&bp, call, &dvp->scb);
 511	xdr_decode_AFSCallBack(&bp, call, &vp->scb);
 512	xdr_decode_AFSVolSync(&bp, &op->volsync);
 513
 514	_leave(" = 0 [done]");
 515	return 0;
 516}
 517
 518/*
 519 * FS.CreateFile and FS.MakeDir operation type
 520 */
 521static const struct afs_call_type afs_RXFSCreateFile = {
 522	.name		= "FS.CreateFile",
 523	.op		= afs_FS_CreateFile,
 524	.deliver	= afs_deliver_fs_create_vnode,
 525	.destructor	= afs_flat_call_destructor,
 526};
 527
 528/*
 529 * Create a file.
 
 530 */
 531void afs_fs_create_file(struct afs_operation *op)
 
 532{
 533	const struct qstr *name = &op->dentry->d_name;
 534	struct afs_vnode_param *dvp = &op->file[0];
 535	struct afs_call *call;
 536	size_t namesz, reqsz, padsz;
 537	__be32 *bp;
 
 538
 539	_enter("");
 
 540
 541	namesz = name->len;
 542	padsz = (4 - (namesz & 3)) & 3;
 543	reqsz = (5 * 4) + namesz + padsz + (6 * 4);
 
 
 
 544
 545	call = afs_alloc_flat_call(op->net, &afs_RXFSCreateFile,
 546				   reqsz, (3 + 21 + 21 + 3 + 6) * 4);
 
 
 547	if (!call)
 548		return afs_op_nomem(op);
 
 
 
 549
 550	/* marshall the parameters */
 551	bp = call->request;
 552	*bp++ = htonl(FSCREATEFILE);
 553	*bp++ = htonl(dvp->fid.vid);
 554	*bp++ = htonl(dvp->fid.vnode);
 555	*bp++ = htonl(dvp->fid.unique);
 556	*bp++ = htonl(namesz);
 557	memcpy(bp, name->name, namesz);
 558	bp = (void *) bp + namesz;
 559	if (padsz > 0) {
 560		memset(bp, 0, padsz);
 561		bp = (void *) bp + padsz;
 
 
 
 
 
 
 
 
 
 
 562	}
 563	*bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
 564	*bp++ = htonl(op->mtime.tv_sec); /* mtime */
 565	*bp++ = 0; /* owner */
 566	*bp++ = 0; /* group */
 567	*bp++ = htonl(op->create.mode & S_IALLUGO); /* unix mode */
 568	*bp++ = 0; /* segment size */
 569
 570	call->fid = dvp->fid;
 571	trace_afs_make_fs_call1(call, &dvp->fid, name);
 572	afs_make_op_call(op, call, GFP_NOFS);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 573}
 574
 575static const struct afs_call_type afs_RXFSMakeDir = {
 576	.name		= "FS.MakeDir",
 577	.op		= afs_FS_MakeDir,
 
 
 578	.deliver	= afs_deliver_fs_create_vnode,
 
 579	.destructor	= afs_flat_call_destructor,
 580};
 581
 582/*
 583 * Create a new directory
 584 */
 585void afs_fs_make_dir(struct afs_operation *op)
 
 
 
 
 
 
 
 
 586{
 587	const struct qstr *name = &op->dentry->d_name;
 588	struct afs_vnode_param *dvp = &op->file[0];
 589	struct afs_call *call;
 590	size_t namesz, reqsz, padsz;
 591	__be32 *bp;
 592
 593	_enter("");
 594
 595	namesz = name->len;
 596	padsz = (4 - (namesz & 3)) & 3;
 597	reqsz = (5 * 4) + namesz + padsz + (6 * 4);
 598
 599	call = afs_alloc_flat_call(op->net, &afs_RXFSMakeDir,
 600				   reqsz, (3 + 21 + 21 + 3 + 6) * 4);
 601	if (!call)
 602		return afs_op_nomem(op);
 
 
 
 
 
 
 
 
 603
 604	/* marshall the parameters */
 605	bp = call->request;
 606	*bp++ = htonl(FSMAKEDIR);
 607	*bp++ = htonl(dvp->fid.vid);
 608	*bp++ = htonl(dvp->fid.vnode);
 609	*bp++ = htonl(dvp->fid.unique);
 610	*bp++ = htonl(namesz);
 611	memcpy(bp, name->name, namesz);
 612	bp = (void *) bp + namesz;
 613	if (padsz > 0) {
 614		memset(bp, 0, padsz);
 615		bp = (void *) bp + padsz;
 616	}
 617	*bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
 618	*bp++ = htonl(op->mtime.tv_sec); /* mtime */
 619	*bp++ = 0; /* owner */
 620	*bp++ = 0; /* group */
 621	*bp++ = htonl(op->create.mode & S_IALLUGO); /* unix mode */
 622	*bp++ = 0; /* segment size */
 623
 624	call->fid = dvp->fid;
 625	trace_afs_make_fs_call1(call, &dvp->fid, name);
 626	afs_make_op_call(op, call, GFP_NOFS);
 627}
 628
 629/*
 630 * Deliver reply data to any operation that returns status and volume sync.
 631 */
 632static int afs_deliver_fs_file_status_and_vol(struct afs_call *call)
 
 633{
 634	struct afs_operation *op = call->op;
 635	struct afs_vnode_param *vp = &op->file[0];
 636	const __be32 *bp;
 637	int ret;
 638
 639	ret = afs_transfer_reply(call);
 640	if (ret < 0)
 641		return ret;
 
 
 
 
 
 642
 643	/* unmarshall the reply once we've received all of it */
 644	bp = call->buffer;
 645	xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
 646	xdr_decode_AFSVolSync(&bp, &op->volsync);
 647
 648	_leave(" = 0 [done]");
 649	return 0;
 650}
 651
 652/*
 653 * FS.RemoveFile operation type
 654 */
 655static const struct afs_call_type afs_RXFSRemoveFile = {
 656	.name		= "FS.RemoveFile",
 657	.op		= afs_FS_RemoveFile,
 658	.deliver	= afs_deliver_fs_file_status_and_vol,
 659	.destructor	= afs_flat_call_destructor,
 660};
 661
 662/*
 663 * Remove a file.
 664 */
 665void afs_fs_remove_file(struct afs_operation *op)
 
 
 
 
 
 666{
 667	const struct qstr *name = &op->dentry->d_name;
 668	struct afs_vnode_param *dvp = &op->file[0];
 669	struct afs_call *call;
 670	size_t namesz, reqsz, padsz;
 671	__be32 *bp;
 672
 673	_enter("");
 674
 675	namesz = name->len;
 676	padsz = (4 - (namesz & 3)) & 3;
 677	reqsz = (5 * 4) + namesz + padsz;
 678
 679	call = afs_alloc_flat_call(op->net, &afs_RXFSRemoveFile,
 680				   reqsz, (21 + 6) * 4);
 681	if (!call)
 682		return afs_op_nomem(op);
 683
 684	/* marshall the parameters */
 685	bp = call->request;
 686	*bp++ = htonl(FSREMOVEFILE);
 687	*bp++ = htonl(dvp->fid.vid);
 688	*bp++ = htonl(dvp->fid.vnode);
 689	*bp++ = htonl(dvp->fid.unique);
 690	*bp++ = htonl(namesz);
 691	memcpy(bp, name->name, namesz);
 692	bp = (void *) bp + namesz;
 693	if (padsz > 0) {
 694		memset(bp, 0, padsz);
 695		bp = (void *) bp + padsz;
 696	}
 697
 698	call->fid = dvp->fid;
 699	trace_afs_make_fs_call1(call, &dvp->fid, name);
 700	afs_make_op_call(op, call, GFP_NOFS);
 701}
 702
 703static const struct afs_call_type afs_RXFSRemoveDir = {
 704	.name		= "FS.RemoveDir",
 705	.op		= afs_FS_RemoveDir,
 706	.deliver	= afs_deliver_fs_file_status_and_vol,
 707	.destructor	= afs_flat_call_destructor,
 708};
 709
 710/*
 711 * Remove a directory.
 712 */
 713void afs_fs_remove_dir(struct afs_operation *op)
 714{
 715	const struct qstr *name = &op->dentry->d_name;
 716	struct afs_vnode_param *dvp = &op->file[0];
 717	struct afs_call *call;
 718	size_t namesz, reqsz, padsz;
 719	__be32 *bp;
 720
 721	_enter("");
 722
 723	namesz = name->len;
 724	padsz = (4 - (namesz & 3)) & 3;
 725	reqsz = (5 * 4) + namesz + padsz;
 726
 727	call = afs_alloc_flat_call(op->net, &afs_RXFSRemoveDir,
 728				   reqsz, (21 + 6) * 4);
 729	if (!call)
 730		return afs_op_nomem(op);
 731
 732	/* marshall the parameters */
 733	bp = call->request;
 734	*bp++ = htonl(FSREMOVEDIR);
 735	*bp++ = htonl(dvp->fid.vid);
 736	*bp++ = htonl(dvp->fid.vnode);
 737	*bp++ = htonl(dvp->fid.unique);
 738	*bp++ = htonl(namesz);
 739	memcpy(bp, name->name, namesz);
 740	bp = (void *) bp + namesz;
 741	if (padsz > 0) {
 742		memset(bp, 0, padsz);
 743		bp = (void *) bp + padsz;
 744	}
 745
 746	call->fid = dvp->fid;
 747	trace_afs_make_fs_call1(call, &dvp->fid, name);
 748	afs_make_op_call(op, call, GFP_NOFS);
 749}
 750
 751/*
 752 * deliver reply data to an FS.Link
 753 */
 754static int afs_deliver_fs_link(struct afs_call *call)
 
 755{
 756	struct afs_operation *op = call->op;
 757	struct afs_vnode_param *dvp = &op->file[0];
 758	struct afs_vnode_param *vp = &op->file[1];
 759	const __be32 *bp;
 760	int ret;
 761
 762	_enter("{%u}", call->unmarshall);
 763
 764	ret = afs_transfer_reply(call);
 765	if (ret < 0)
 766		return ret;
 
 
 
 767
 768	/* unmarshall the reply once we've received all of it */
 769	bp = call->buffer;
 770	xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
 771	xdr_decode_AFSFetchStatus(&bp, call, &dvp->scb);
 772	xdr_decode_AFSVolSync(&bp, &op->volsync);
 773
 774	_leave(" = 0 [done]");
 775	return 0;
 776}
 777
 778/*
 779 * FS.Link operation type
 780 */
 781static const struct afs_call_type afs_RXFSLink = {
 782	.name		= "FS.Link",
 783	.op		= afs_FS_Link,
 784	.deliver	= afs_deliver_fs_link,
 
 785	.destructor	= afs_flat_call_destructor,
 786};
 787
 788/*
 789 * make a hard link
 790 */
 791void afs_fs_link(struct afs_operation *op)
 
 
 
 
 
 792{
 793	const struct qstr *name = &op->dentry->d_name;
 794	struct afs_vnode_param *dvp = &op->file[0];
 795	struct afs_vnode_param *vp = &op->file[1];
 796	struct afs_call *call;
 797	size_t namesz, reqsz, padsz;
 798	__be32 *bp;
 799
 800	_enter("");
 801
 802	namesz = name->len;
 803	padsz = (4 - (namesz & 3)) & 3;
 804	reqsz = (5 * 4) + namesz + padsz + (3 * 4);
 805
 806	call = afs_alloc_flat_call(op->net, &afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
 807	if (!call)
 808		return afs_op_nomem(op);
 
 
 
 
 
 
 809
 810	/* marshall the parameters */
 811	bp = call->request;
 812	*bp++ = htonl(FSLINK);
 813	*bp++ = htonl(dvp->fid.vid);
 814	*bp++ = htonl(dvp->fid.vnode);
 815	*bp++ = htonl(dvp->fid.unique);
 816	*bp++ = htonl(namesz);
 817	memcpy(bp, name->name, namesz);
 818	bp = (void *) bp + namesz;
 819	if (padsz > 0) {
 820		memset(bp, 0, padsz);
 821		bp = (void *) bp + padsz;
 822	}
 823	*bp++ = htonl(vp->fid.vid);
 824	*bp++ = htonl(vp->fid.vnode);
 825	*bp++ = htonl(vp->fid.unique);
 826
 827	call->fid = vp->fid;
 828	trace_afs_make_fs_call1(call, &vp->fid, name);
 829	afs_make_op_call(op, call, GFP_NOFS);
 830}
 831
 832/*
 833 * deliver reply data to an FS.Symlink
 834 */
 835static int afs_deliver_fs_symlink(struct afs_call *call)
 
 836{
 837	struct afs_operation *op = call->op;
 838	struct afs_vnode_param *dvp = &op->file[0];
 839	struct afs_vnode_param *vp = &op->file[1];
 840	const __be32 *bp;
 841	int ret;
 842
 843	_enter("{%u}", call->unmarshall);
 
 
 
 
 844
 845	ret = afs_transfer_reply(call);
 846	if (ret < 0)
 847		return ret;
 848
 849	/* unmarshall the reply once we've received all of it */
 850	bp = call->buffer;
 851	xdr_decode_AFSFid(&bp, &vp->fid);
 852	xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
 853	xdr_decode_AFSFetchStatus(&bp, call, &dvp->scb);
 854	xdr_decode_AFSVolSync(&bp, &op->volsync);
 855
 856	_leave(" = 0 [done]");
 857	return 0;
 858}
 859
 860/*
 861 * FS.Symlink operation type
 862 */
 863static const struct afs_call_type afs_RXFSSymlink = {
 864	.name		= "FS.Symlink",
 865	.op		= afs_FS_Symlink,
 866	.deliver	= afs_deliver_fs_symlink,
 
 867	.destructor	= afs_flat_call_destructor,
 868};
 869
 870/*
 871 * create a symbolic link
 872 */
 873void afs_fs_symlink(struct afs_operation *op)
 
 
 
 
 
 
 
 874{
 875	const struct qstr *name = &op->dentry->d_name;
 876	struct afs_vnode_param *dvp = &op->file[0];
 877	struct afs_call *call;
 878	size_t namesz, reqsz, padsz, c_namesz, c_padsz;
 879	__be32 *bp;
 880
 881	_enter("");
 882
 883	namesz = name->len;
 884	padsz = (4 - (namesz & 3)) & 3;
 885
 886	c_namesz = strlen(op->create.symlink);
 887	c_padsz = (4 - (c_namesz & 3)) & 3;
 888
 889	reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4);
 890
 891	call = afs_alloc_flat_call(op->net, &afs_RXFSSymlink, reqsz,
 892				   (3 + 21 + 21 + 6) * 4);
 893	if (!call)
 894		return afs_op_nomem(op);
 
 
 
 
 
 
 
 895
 896	/* marshall the parameters */
 897	bp = call->request;
 898	*bp++ = htonl(FSSYMLINK);
 899	*bp++ = htonl(dvp->fid.vid);
 900	*bp++ = htonl(dvp->fid.vnode);
 901	*bp++ = htonl(dvp->fid.unique);
 902	*bp++ = htonl(namesz);
 903	memcpy(bp, name->name, namesz);
 904	bp = (void *) bp + namesz;
 905	if (padsz > 0) {
 906		memset(bp, 0, padsz);
 907		bp = (void *) bp + padsz;
 908	}
 909	*bp++ = htonl(c_namesz);
 910	memcpy(bp, op->create.symlink, c_namesz);
 911	bp = (void *) bp + c_namesz;
 912	if (c_padsz > 0) {
 913		memset(bp, 0, c_padsz);
 914		bp = (void *) bp + c_padsz;
 915	}
 916	*bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
 917	*bp++ = htonl(op->mtime.tv_sec); /* mtime */
 918	*bp++ = 0; /* owner */
 919	*bp++ = 0; /* group */
 920	*bp++ = htonl(S_IRWXUGO); /* unix mode */
 921	*bp++ = 0; /* segment size */
 922
 923	call->fid = dvp->fid;
 924	trace_afs_make_fs_call1(call, &dvp->fid, name);
 925	afs_make_op_call(op, call, GFP_NOFS);
 926}
 927
 928/*
 929 * deliver reply data to an FS.Rename
 930 */
 931static int afs_deliver_fs_rename(struct afs_call *call)
 
 932{
 933	struct afs_operation *op = call->op;
 934	struct afs_vnode_param *orig_dvp = &op->file[0];
 935	struct afs_vnode_param *new_dvp = &op->file[1];
 936	const __be32 *bp;
 937	int ret;
 938
 939	ret = afs_transfer_reply(call);
 940	if (ret < 0)
 941		return ret;
 
 
 
 
 
 942
 
 943	bp = call->buffer;
 944	/* If the two dirs are the same, we have two copies of the same status
 945	 * report, so we just decode it twice.
 946	 */
 947	xdr_decode_AFSFetchStatus(&bp, call, &orig_dvp->scb);
 948	xdr_decode_AFSFetchStatus(&bp, call, &new_dvp->scb);
 949	xdr_decode_AFSVolSync(&bp, &op->volsync);
 950
 951	_leave(" = 0 [done]");
 952	return 0;
 953}
 954
 955/*
 956 * FS.Rename operation type
 957 */
 958static const struct afs_call_type afs_RXFSRename = {
 959	.name		= "FS.Rename",
 960	.op		= afs_FS_Rename,
 961	.deliver	= afs_deliver_fs_rename,
 
 962	.destructor	= afs_flat_call_destructor,
 963};
 964
 965/*
 966 * Rename/move a file or directory.
 967 */
 968void afs_fs_rename(struct afs_operation *op)
 
 
 
 
 
 
 969{
 970	struct afs_vnode_param *orig_dvp = &op->file[0];
 971	struct afs_vnode_param *new_dvp = &op->file[1];
 972	const struct qstr *orig_name = &op->dentry->d_name;
 973	const struct qstr *new_name = &op->dentry_2->d_name;
 974	struct afs_call *call;
 975	size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz;
 976	__be32 *bp;
 977
 978	_enter("");
 979
 980	o_namesz = orig_name->len;
 981	o_padsz = (4 - (o_namesz & 3)) & 3;
 982
 983	n_namesz = new_name->len;
 984	n_padsz = (4 - (n_namesz & 3)) & 3;
 985
 986	reqsz = (4 * 4) +
 987		4 + o_namesz + o_padsz +
 988		(3 * 4) +
 989		4 + n_namesz + n_padsz;
 990
 991	call = afs_alloc_flat_call(op->net, &afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
 992	if (!call)
 993		return afs_op_nomem(op);
 
 
 
 
 
 
 994
 995	/* marshall the parameters */
 996	bp = call->request;
 997	*bp++ = htonl(FSRENAME);
 998	*bp++ = htonl(orig_dvp->fid.vid);
 999	*bp++ = htonl(orig_dvp->fid.vnode);
1000	*bp++ = htonl(orig_dvp->fid.unique);
1001	*bp++ = htonl(o_namesz);
1002	memcpy(bp, orig_name->name, o_namesz);
1003	bp = (void *) bp + o_namesz;
1004	if (o_padsz > 0) {
1005		memset(bp, 0, o_padsz);
1006		bp = (void *) bp + o_padsz;
1007	}
1008
1009	*bp++ = htonl(new_dvp->fid.vid);
1010	*bp++ = htonl(new_dvp->fid.vnode);
1011	*bp++ = htonl(new_dvp->fid.unique);
1012	*bp++ = htonl(n_namesz);
1013	memcpy(bp, new_name->name, n_namesz);
1014	bp = (void *) bp + n_namesz;
1015	if (n_padsz > 0) {
1016		memset(bp, 0, n_padsz);
1017		bp = (void *) bp + n_padsz;
1018	}
1019
1020	call->fid = orig_dvp->fid;
1021	trace_afs_make_fs_call2(call, &orig_dvp->fid, orig_name, new_name);
1022	afs_make_op_call(op, call, GFP_NOFS);
1023}
1024
1025/*
1026 * Deliver reply data to FS.StoreData or FS.StoreStatus
1027 */
1028static int afs_deliver_fs_store_data(struct afs_call *call)
 
1029{
1030	struct afs_operation *op = call->op;
1031	struct afs_vnode_param *vp = &op->file[0];
1032	const __be32 *bp;
1033	int ret;
1034
1035	_enter("");
1036
1037	ret = afs_transfer_reply(call);
1038	if (ret < 0)
1039		return ret;
 
 
 
 
 
 
 
 
1040
1041	/* unmarshall the reply once we've received all of it */
1042	bp = call->buffer;
1043	xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
1044	xdr_decode_AFSVolSync(&bp, &op->volsync);
 
 
 
1045
1046	_leave(" = 0 [done]");
1047	return 0;
1048}
1049
1050/*
1051 * FS.StoreData operation type
1052 */
1053static const struct afs_call_type afs_RXFSStoreData = {
1054	.name		= "FS.StoreData",
1055	.op		= afs_FS_StoreData,
1056	.deliver	= afs_deliver_fs_store_data,
 
1057	.destructor	= afs_flat_call_destructor,
1058};
1059
1060static const struct afs_call_type afs_RXFSStoreData64 = {
1061	.name		= "FS.StoreData64",
1062	.op		= afs_FS_StoreData64,
1063	.deliver	= afs_deliver_fs_store_data,
 
1064	.destructor	= afs_flat_call_destructor,
1065};
1066
1067/*
1068 * store a set of pages to a very large file
1069 */
1070static void afs_fs_store_data64(struct afs_operation *op)
 
 
 
 
 
1071{
1072	struct afs_vnode_param *vp = &op->file[0];
1073	struct afs_call *call;
1074	__be32 *bp;
1075
1076	_enter(",%x,{%llx:%llu},,",
1077	       key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1078
1079	call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData64,
1080				   (4 + 6 + 3 * 2) * 4,
1081				   (21 + 6) * 4);
1082	if (!call)
1083		return afs_op_nomem(op);
1084
1085	call->write_iter = op->store.write_iter;
 
 
 
 
 
 
 
 
 
 
 
1086
1087	/* marshall the parameters */
1088	bp = call->request;
1089	*bp++ = htonl(FSSTOREDATA64);
1090	*bp++ = htonl(vp->fid.vid);
1091	*bp++ = htonl(vp->fid.vnode);
1092	*bp++ = htonl(vp->fid.unique);
1093
1094	*bp++ = htonl(AFS_SET_MTIME); /* mask */
1095	*bp++ = htonl(op->mtime.tv_sec); /* mtime */
1096	*bp++ = 0; /* owner */
1097	*bp++ = 0; /* group */
1098	*bp++ = 0; /* unix mode */
1099	*bp++ = 0; /* segment size */
1100
1101	*bp++ = htonl(upper_32_bits(op->store.pos));
1102	*bp++ = htonl(lower_32_bits(op->store.pos));
1103	*bp++ = htonl(upper_32_bits(op->store.size));
1104	*bp++ = htonl(lower_32_bits(op->store.size));
1105	*bp++ = htonl(upper_32_bits(op->store.i_size));
1106	*bp++ = htonl(lower_32_bits(op->store.i_size));
1107
1108	call->fid = vp->fid;
1109	trace_afs_make_fs_call(call, &vp->fid);
1110	afs_make_op_call(op, call, GFP_NOFS);
1111}
1112
1113/*
1114 * Write data to a file on the server.
1115 */
1116void afs_fs_store_data(struct afs_operation *op)
 
 
 
1117{
1118	struct afs_vnode_param *vp = &op->file[0];
1119	struct afs_call *call;
 
1120	__be32 *bp;
1121
1122	_enter(",%x,{%llx:%llu},,",
1123	       key_serial(op->key), vp->fid.vid, vp->fid.vnode);
 
 
 
 
 
 
 
 
 
 
1124
1125	_debug("size %llx, at %llx, i_size %llx",
1126	       (unsigned long long)op->store.size,
1127	       (unsigned long long)op->store.pos,
1128	       (unsigned long long)op->store.i_size);
1129
1130	if (test_bit(AFS_SERVER_FL_HAS_FS64, &op->server->flags))
1131		return afs_fs_store_data64(op);
 
1132
1133	call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData,
1134				   (4 + 6 + 3) * 4,
1135				   (21 + 6) * 4);
1136	if (!call)
1137		return afs_op_nomem(op);
1138
1139	call->write_iter = op->store.write_iter;
 
 
 
 
 
 
 
 
 
 
 
1140
1141	/* marshall the parameters */
1142	bp = call->request;
1143	*bp++ = htonl(FSSTOREDATA);
1144	*bp++ = htonl(vp->fid.vid);
1145	*bp++ = htonl(vp->fid.vnode);
1146	*bp++ = htonl(vp->fid.unique);
1147
1148	*bp++ = htonl(AFS_SET_MTIME); /* mask */
1149	*bp++ = htonl(op->mtime.tv_sec); /* mtime */
1150	*bp++ = 0; /* owner */
1151	*bp++ = 0; /* group */
1152	*bp++ = 0; /* unix mode */
1153	*bp++ = 0; /* segment size */
1154
1155	*bp++ = htonl(lower_32_bits(op->store.pos));
1156	*bp++ = htonl(lower_32_bits(op->store.size));
1157	*bp++ = htonl(lower_32_bits(op->store.i_size));
1158
1159	call->fid = vp->fid;
1160	trace_afs_make_fs_call(call, &vp->fid);
1161	afs_make_op_call(op, call, GFP_NOFS);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1162}
1163
1164/*
1165 * FS.StoreStatus operation type
1166 */
1167static const struct afs_call_type afs_RXFSStoreStatus = {
1168	.name		= "FS.StoreStatus",
1169	.op		= afs_FS_StoreStatus,
1170	.deliver	= afs_deliver_fs_store_data,
1171	.destructor	= afs_flat_call_destructor,
1172};
1173
1174static const struct afs_call_type afs_RXFSStoreData_as_Status = {
1175	.name		= "FS.StoreData",
1176	.op		= afs_FS_StoreData,
1177	.deliver	= afs_deliver_fs_store_data,
1178	.destructor	= afs_flat_call_destructor,
1179};
1180
1181static const struct afs_call_type afs_RXFSStoreData64_as_Status = {
1182	.name		= "FS.StoreData64",
1183	.op		= afs_FS_StoreData64,
1184	.deliver	= afs_deliver_fs_store_data,
1185	.destructor	= afs_flat_call_destructor,
1186};
1187
1188/*
1189 * set the attributes on a very large file, using FS.StoreData rather than
1190 * FS.StoreStatus so as to alter the file size also
1191 */
1192static void afs_fs_setattr_size64(struct afs_operation *op)
 
 
1193{
1194	struct afs_vnode_param *vp = &op->file[0];
1195	struct afs_call *call;
1196	struct iattr *attr = op->setattr.attr;
1197	__be32 *bp;
1198
1199	_enter(",%x,{%llx:%llu},,",
1200	       key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1201
1202	ASSERT(attr->ia_valid & ATTR_SIZE);
1203
1204	call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData64_as_Status,
1205				   (4 + 6 + 3 * 2) * 4,
1206				   (21 + 6) * 4);
1207	if (!call)
1208		return afs_op_nomem(op);
 
 
 
 
 
 
 
1209
1210	/* marshall the parameters */
1211	bp = call->request;
1212	*bp++ = htonl(FSSTOREDATA64);
1213	*bp++ = htonl(vp->fid.vid);
1214	*bp++ = htonl(vp->fid.vnode);
1215	*bp++ = htonl(vp->fid.unique);
1216
1217	xdr_encode_AFS_StoreStatus(&bp, attr);
1218
1219	*bp++ = htonl(upper_32_bits(attr->ia_size));	/* position of start of write */
1220	*bp++ = htonl(lower_32_bits(attr->ia_size));
1221	*bp++ = 0;					/* size of write */
1222	*bp++ = 0;
1223	*bp++ = htonl(upper_32_bits(attr->ia_size));	/* new file length */
1224	*bp++ = htonl(lower_32_bits(attr->ia_size));
 
 
1225
1226	call->fid = vp->fid;
1227	trace_afs_make_fs_call(call, &vp->fid);
1228	afs_make_op_call(op, call, GFP_NOFS);
1229}
1230
1231/*
1232 * set the attributes on a file, using FS.StoreData rather than FS.StoreStatus
1233 * so as to alter the file size also
1234 */
1235static void afs_fs_setattr_size(struct afs_operation *op)
 
 
1236{
1237	struct afs_vnode_param *vp = &op->file[0];
1238	struct afs_call *call;
1239	struct iattr *attr = op->setattr.attr;
1240	__be32 *bp;
1241
1242	_enter(",%x,{%llx:%llu},,",
1243	       key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1244
1245	ASSERT(attr->ia_valid & ATTR_SIZE);
1246	if (test_bit(AFS_SERVER_FL_HAS_FS64, &op->server->flags))
1247		return afs_fs_setattr_size64(op);
 
1248
1249	call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData_as_Status,
1250				   (4 + 6 + 3) * 4,
1251				   (21 + 6) * 4);
1252	if (!call)
1253		return afs_op_nomem(op);
 
 
 
 
 
 
 
1254
1255	/* marshall the parameters */
1256	bp = call->request;
1257	*bp++ = htonl(FSSTOREDATA);
1258	*bp++ = htonl(vp->fid.vid);
1259	*bp++ = htonl(vp->fid.vnode);
1260	*bp++ = htonl(vp->fid.unique);
1261
1262	xdr_encode_AFS_StoreStatus(&bp, attr);
1263
1264	*bp++ = htonl(attr->ia_size);		/* position of start of write */
1265	*bp++ = 0;				/* size of write */
1266	*bp++ = htonl(attr->ia_size);		/* new file length */
1267
1268	call->fid = vp->fid;
1269	trace_afs_make_fs_call(call, &vp->fid);
1270	afs_make_op_call(op, call, GFP_NOFS);
1271}
1272
1273/*
1274 * set the attributes on a file, using FS.StoreData if there's a change in file
1275 * size, and FS.StoreStatus otherwise
1276 */
1277void afs_fs_setattr(struct afs_operation *op)
 
 
1278{
1279	struct afs_vnode_param *vp = &op->file[0];
1280	struct afs_call *call;
1281	struct iattr *attr = op->setattr.attr;
1282	__be32 *bp;
1283
1284	if (attr->ia_valid & ATTR_SIZE)
1285		return afs_fs_setattr_size(op);
 
1286
1287	_enter(",%x,{%llx:%llu},,",
1288	       key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1289
1290	call = afs_alloc_flat_call(op->net, &afs_RXFSStoreStatus,
1291				   (4 + 6) * 4,
1292				   (21 + 6) * 4);
1293	if (!call)
1294		return afs_op_nomem(op);
 
 
 
 
 
 
1295
1296	/* marshall the parameters */
1297	bp = call->request;
1298	*bp++ = htonl(FSSTORESTATUS);
1299	*bp++ = htonl(vp->fid.vid);
1300	*bp++ = htonl(vp->fid.vnode);
1301	*bp++ = htonl(vp->fid.unique);
1302
1303	xdr_encode_AFS_StoreStatus(&bp, op->setattr.attr);
1304
1305	call->fid = vp->fid;
1306	trace_afs_make_fs_call(call, &vp->fid);
1307	afs_make_op_call(op, call, GFP_NOFS);
1308}
1309
1310/*
1311 * deliver reply data to an FS.GetVolumeStatus
1312 */
1313static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 
1314{
1315	struct afs_operation *op = call->op;
1316	const __be32 *bp;
1317	char *p;
1318	u32 size;
1319	int ret;
1320
1321	_enter("{%u}", call->unmarshall);
1322
1323	switch (call->unmarshall) {
1324	case 0:
 
1325		call->unmarshall++;
1326		afs_extract_to_buf(call, 12 * 4);
1327		fallthrough;
1328
1329		/* extract the returned status record */
1330	case 1:
1331		_debug("extract status");
1332		ret = afs_extract_data(call, true);
1333		if (ret < 0)
1334			return ret;
 
 
 
 
1335
1336		bp = call->buffer;
1337		xdr_decode_AFSFetchVolumeStatus(&bp, &op->volstatus.vs);
 
1338		call->unmarshall++;
1339		afs_extract_to_tmp(call);
1340		fallthrough;
1341
1342		/* extract the volume name length */
1343	case 2:
1344		ret = afs_extract_data(call, true);
1345		if (ret < 0)
1346			return ret;
 
 
 
1347
1348		call->count = ntohl(call->tmp);
1349		_debug("volname length: %u", call->count);
1350		if (call->count >= AFSNAMEMAX)
1351			return afs_protocol_error(call, afs_eproto_volname_len);
1352		size = (call->count + 3) & ~3; /* It's padded */
1353		afs_extract_to_buf(call, size);
1354		call->unmarshall++;
1355		fallthrough;
1356
1357		/* extract the volume name */
1358	case 3:
1359		_debug("extract volname");
1360		ret = afs_extract_data(call, true);
1361		if (ret < 0)
1362			return ret;
 
 
 
 
 
 
1363
1364		p = call->buffer;
1365		p[call->count] = 0;
1366		_debug("volname '%s'", p);
1367		afs_extract_to_tmp(call);
 
1368		call->unmarshall++;
1369		fallthrough;
1370
1371		/* extract the offline message length */
 
 
 
 
 
 
1372	case 4:
1373		ret = afs_extract_data(call, true);
1374		if (ret < 0)
1375			return ret;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1376
1377		call->count = ntohl(call->tmp);
1378		_debug("offline msg length: %u", call->count);
1379		if (call->count >= AFSNAMEMAX)
1380			return afs_protocol_error(call, afs_eproto_offline_msg_len);
1381		size = (call->count + 3) & ~3; /* It's padded */
1382		afs_extract_to_buf(call, size);
1383		call->unmarshall++;
1384		fallthrough;
1385
1386		/* extract the offline message */
1387	case 5:
1388		_debug("extract offline");
1389		ret = afs_extract_data(call, true);
1390		if (ret < 0)
1391			return ret;
 
 
 
 
 
 
1392
1393		p = call->buffer;
1394		p[call->count] = 0;
1395		_debug("offline '%s'", p);
1396
1397		afs_extract_to_tmp(call);
1398		call->unmarshall++;
1399		fallthrough;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1400
1401		/* extract the message of the day length */
1402	case 6:
1403		ret = afs_extract_data(call, true);
1404		if (ret < 0)
1405			return ret;
 
 
 
1406
1407		call->count = ntohl(call->tmp);
1408		_debug("motd length: %u", call->count);
1409		if (call->count >= AFSNAMEMAX)
1410			return afs_protocol_error(call, afs_eproto_motd_len);
1411		size = (call->count + 3) & ~3; /* It's padded */
1412		afs_extract_to_buf(call, size);
1413		call->unmarshall++;
1414		fallthrough;
1415
1416		/* extract the message of the day */
1417	case 7:
1418		_debug("extract motd");
1419		ret = afs_extract_data(call, false);
1420		if (ret < 0)
1421			return ret;
 
 
 
 
 
 
1422
1423		p = call->buffer;
1424		p[call->count] = 0;
1425		_debug("motd '%s'", p);
1426
 
1427		call->unmarshall++;
1428		fallthrough;
1429
1430	case 8:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1431		break;
1432	}
1433
 
 
 
1434	_leave(" = 0 [done]");
1435	return 0;
1436}
1437
1438/*
 
 
 
 
 
 
 
 
 
 
1439 * FS.GetVolumeStatus operation type
1440 */
1441static const struct afs_call_type afs_RXFSGetVolumeStatus = {
1442	.name		= "FS.GetVolumeStatus",
1443	.op		= afs_FS_GetVolumeStatus,
1444	.deliver	= afs_deliver_fs_get_volume_status,
1445	.destructor	= afs_flat_call_destructor,
 
1446};
1447
1448/*
1449 * fetch the status of a volume
1450 */
1451void afs_fs_get_volume_status(struct afs_operation *op)
 
 
 
 
1452{
1453	struct afs_vnode_param *vp = &op->file[0];
1454	struct afs_call *call;
1455	__be32 *bp;
 
1456
1457	_enter("");
1458
1459	call = afs_alloc_flat_call(op->net, &afs_RXFSGetVolumeStatus, 2 * 4,
1460				   max(12 * 4, AFSOPAQUEMAX + 1));
1461	if (!call)
1462		return afs_op_nomem(op);
 
 
 
 
 
 
 
 
 
 
 
 
1463
1464	/* marshall the parameters */
1465	bp = call->request;
1466	bp[0] = htonl(FSGETVOLUMESTATUS);
1467	bp[1] = htonl(vp->fid.vid);
1468
1469	call->fid = vp->fid;
1470	trace_afs_make_fs_call(call, &vp->fid);
1471	afs_make_op_call(op, call, GFP_NOFS);
1472}
1473
1474/*
1475 * deliver reply data to an FS.SetLock, FS.ExtendLock or FS.ReleaseLock
1476 */
1477static int afs_deliver_fs_xxxx_lock(struct afs_call *call)
 
1478{
1479	struct afs_operation *op = call->op;
1480	const __be32 *bp;
1481	int ret;
1482
1483	_enter("{%u}", call->unmarshall);
1484
1485	ret = afs_transfer_reply(call);
1486	if (ret < 0)
1487		return ret;
 
 
 
1488
1489	/* unmarshall the reply once we've received all of it */
1490	bp = call->buffer;
1491	xdr_decode_AFSVolSync(&bp, &op->volsync);
1492
1493	_leave(" = 0 [done]");
1494	return 0;
1495}
1496
1497/*
1498 * FS.SetLock operation type
1499 */
1500static const struct afs_call_type afs_RXFSSetLock = {
1501	.name		= "FS.SetLock",
1502	.op		= afs_FS_SetLock,
1503	.deliver	= afs_deliver_fs_xxxx_lock,
1504	.done		= afs_lock_op_done,
1505	.destructor	= afs_flat_call_destructor,
1506};
1507
1508/*
1509 * FS.ExtendLock operation type
1510 */
1511static const struct afs_call_type afs_RXFSExtendLock = {
1512	.name		= "FS.ExtendLock",
1513	.op		= afs_FS_ExtendLock,
1514	.deliver	= afs_deliver_fs_xxxx_lock,
1515	.done		= afs_lock_op_done,
1516	.destructor	= afs_flat_call_destructor,
1517};
1518
1519/*
1520 * FS.ReleaseLock operation type
1521 */
1522static const struct afs_call_type afs_RXFSReleaseLock = {
1523	.name		= "FS.ReleaseLock",
1524	.op		= afs_FS_ReleaseLock,
1525	.deliver	= afs_deliver_fs_xxxx_lock,
 
1526	.destructor	= afs_flat_call_destructor,
1527};
1528
1529/*
1530 * Set a lock on a file
1531 */
1532void afs_fs_set_lock(struct afs_operation *op)
1533{
1534	struct afs_vnode_param *vp = &op->file[0];
1535	struct afs_call *call;
1536	__be32 *bp;
1537
1538	_enter("");
1539
1540	call = afs_alloc_flat_call(op->net, &afs_RXFSSetLock, 5 * 4, 6 * 4);
1541	if (!call)
1542		return afs_op_nomem(op);
1543
1544	/* marshall the parameters */
1545	bp = call->request;
1546	*bp++ = htonl(FSSETLOCK);
1547	*bp++ = htonl(vp->fid.vid);
1548	*bp++ = htonl(vp->fid.vnode);
1549	*bp++ = htonl(vp->fid.unique);
1550	*bp++ = htonl(op->lock.type);
1551
1552	call->fid = vp->fid;
1553	trace_afs_make_fs_calli(call, &vp->fid, op->lock.type);
1554	afs_make_op_call(op, call, GFP_NOFS);
1555}
1556
1557/*
1558 * extend a lock on a file
1559 */
1560void afs_fs_extend_lock(struct afs_operation *op)
 
 
 
 
1561{
1562	struct afs_vnode_param *vp = &op->file[0];
1563	struct afs_call *call;
1564	__be32 *bp;
1565
1566	_enter("");
1567
1568	call = afs_alloc_flat_call(op->net, &afs_RXFSExtendLock, 4 * 4, 6 * 4);
1569	if (!call)
1570		return afs_op_nomem(op);
1571
1572	/* marshall the parameters */
1573	bp = call->request;
1574	*bp++ = htonl(FSEXTENDLOCK);
1575	*bp++ = htonl(vp->fid.vid);
1576	*bp++ = htonl(vp->fid.vnode);
1577	*bp++ = htonl(vp->fid.unique);
1578
1579	call->fid = vp->fid;
1580	trace_afs_make_fs_call(call, &vp->fid);
1581	afs_make_op_call(op, call, GFP_NOFS);
1582}
1583
1584/*
1585 * release a lock on a file
1586 */
1587void afs_fs_release_lock(struct afs_operation *op)
1588{
1589	struct afs_vnode_param *vp = &op->file[0];
1590	struct afs_call *call;
1591	__be32 *bp;
1592
1593	_enter("");
1594
1595	call = afs_alloc_flat_call(op->net, &afs_RXFSReleaseLock, 4 * 4, 6 * 4);
1596	if (!call)
1597		return afs_op_nomem(op);
 
1598
1599	/* marshall the parameters */
1600	bp = call->request;
1601	*bp++ = htonl(FSRELEASELOCK);
1602	*bp++ = htonl(vp->fid.vid);
1603	*bp++ = htonl(vp->fid.vnode);
1604	*bp++ = htonl(vp->fid.unique);
1605
1606	call->fid = vp->fid;
1607	trace_afs_make_fs_call(call, &vp->fid);
1608	afs_make_op_call(op, call, GFP_NOFS);
1609}
1610
1611/*
1612 * Deliver reply data to an FS.GiveUpAllCallBacks operation.
1613 */
1614static int afs_deliver_fs_give_up_all_callbacks(struct afs_call *call)
1615{
1616	return afs_transfer_reply(call);
1617}
1618
1619/*
1620 * FS.GiveUpAllCallBacks operation type
1621 */
1622static const struct afs_call_type afs_RXFSGiveUpAllCallBacks = {
1623	.name		= "FS.GiveUpAllCallBacks",
1624	.op		= afs_FS_GiveUpAllCallBacks,
1625	.deliver	= afs_deliver_fs_give_up_all_callbacks,
1626	.destructor	= afs_flat_call_destructor,
1627};
1628
1629/*
1630 * Flush all the callbacks we have on a server.
1631 */
1632int afs_fs_give_up_all_callbacks(struct afs_net *net, struct afs_server *server,
1633				 struct afs_address *addr, struct key *key)
 
 
1634{
1635	struct afs_call *call;
1636	__be32 *bp;
1637	int ret;
1638
1639	_enter("");
1640
1641	call = afs_alloc_flat_call(net, &afs_RXFSGiveUpAllCallBacks, 1 * 4, 0);
1642	if (!call)
1643		return -ENOMEM;
1644
1645	call->key	= key;
1646	call->peer	= rxrpc_kernel_get_peer(addr->peer);
1647	call->service_id = server->service_id;
 
1648
1649	/* marshall the parameters */
1650	bp = call->request;
1651	*bp++ = htonl(FSGIVEUPALLCALLBACKS);
1652
1653	call->server = afs_use_server(server, afs_server_trace_give_up_cb);
1654	afs_make_call(call, GFP_NOFS);
1655	afs_wait_for_call_to_complete(call);
1656	ret = call->error;
1657	if (call->responded)
1658		set_bit(AFS_SERVER_FL_RESPONDING, &server->flags);
1659	afs_put_call(call);
1660	return ret;
1661}
1662
1663/*
1664 * Deliver reply data to an FS.GetCapabilities operation.
1665 */
1666static int afs_deliver_fs_get_capabilities(struct afs_call *call)
1667{
1668	u32 count;
1669	int ret;
1670
1671	_enter("{%u,%zu}", call->unmarshall, iov_iter_count(call->iter));
1672
1673	switch (call->unmarshall) {
1674	case 0:
1675		afs_extract_to_tmp(call);
1676		call->unmarshall++;
1677		fallthrough;
1678
1679		/* Extract the capabilities word count */
1680	case 1:
1681		ret = afs_extract_data(call, true);
1682		if (ret < 0)
1683			return ret;
1684
1685		count = ntohl(call->tmp);
1686		call->count = count;
1687		call->count2 = count;
1688		if (count == 0) {
1689			call->unmarshall = 4;
1690			call->tmp = 0;
1691			break;
1692		}
1693
1694		/* Extract the first word of the capabilities to call->tmp */
1695		afs_extract_to_tmp(call);
1696		call->unmarshall++;
1697		fallthrough;
1698
1699	case 2:
1700		ret = afs_extract_data(call, false);
1701		if (ret < 0)
1702			return ret;
1703
1704		afs_extract_discard(call, (count - 1) * sizeof(__be32));
1705		call->unmarshall++;
1706		fallthrough;
1707
1708		/* Extract remaining capabilities words */
1709	case 3:
1710		ret = afs_extract_data(call, false);
1711		if (ret < 0)
1712			return ret;
1713
1714		call->unmarshall++;
1715		break;
1716	}
1717
1718	_leave(" = 0 [done]");
1719	return 0;
1720}
1721
1722static void afs_fs_get_capabilities_destructor(struct afs_call *call)
1723{
1724	afs_put_endpoint_state(call->probe, afs_estate_trace_put_getcaps);
1725	afs_flat_call_destructor(call);
1726}
1727
1728/*
1729 * FS.GetCapabilities operation type
1730 */
1731static const struct afs_call_type afs_RXFSGetCapabilities = {
1732	.name		= "FS.GetCapabilities",
1733	.op		= afs_FS_GetCapabilities,
1734	.deliver	= afs_deliver_fs_get_capabilities,
1735	.done		= afs_fileserver_probe_result,
1736	.destructor	= afs_fs_get_capabilities_destructor,
1737};
1738
1739/*
1740 * Probe a fileserver for the capabilities that it supports.  This RPC can
1741 * reply with up to 196 words.  The operation is asynchronous and if we managed
1742 * to allocate a call, true is returned the result is delivered through the
1743 * ->done() - otherwise we return false to indicate we didn't even try.
1744 */
1745bool afs_fs_get_capabilities(struct afs_net *net, struct afs_server *server,
1746			     struct afs_endpoint_state *estate, unsigned int addr_index,
1747			     struct key *key)
1748{
1749	struct afs_call *call;
1750	__be32 *bp;
1751
1752	_enter("");
1753
1754	call = afs_alloc_flat_call(net, &afs_RXFSGetCapabilities, 1 * 4, 16 * 4);
1755	if (!call)
1756		return false;
1757
1758	call->key	= key;
1759	call->server	= afs_use_server(server, afs_server_trace_get_caps);
1760	call->peer	= rxrpc_kernel_get_peer(estate->addresses->addrs[addr_index].peer);
1761	call->probe	= afs_get_endpoint_state(estate, afs_estate_trace_get_getcaps);
1762	call->probe_index = addr_index;
1763	call->service_id = server->service_id;
1764	call->upgrade	= true;
1765	call->async	= true;
1766	call->max_lifespan = AFS_PROBE_MAX_LIFESPAN;
1767
1768	/* marshall the parameters */
1769	bp = call->request;
1770	*bp++ = htonl(FSGETCAPABILITIES);
1771
1772	trace_afs_make_fs_call(call, NULL);
1773	afs_make_call(call, GFP_NOFS);
1774	afs_put_call(call);
1775	return true;
1776}
1777
1778/*
1779 * Deliver reply data to an FS.InlineBulkStatus call
1780 */
1781static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
1782{
1783	struct afs_operation *op = call->op;
1784	struct afs_status_cb *scb;
1785	const __be32 *bp;
1786	u32 tmp;
1787	int ret;
1788
1789	_enter("{%u}", call->unmarshall);
1790
1791	switch (call->unmarshall) {
1792	case 0:
1793		afs_extract_to_tmp(call);
1794		call->unmarshall++;
1795		fallthrough;
1796
1797		/* Extract the file status count and array in two steps */
1798	case 1:
1799		_debug("extract status count");
1800		ret = afs_extract_data(call, true);
1801		if (ret < 0)
1802			return ret;
1803
1804		tmp = ntohl(call->tmp);
1805		_debug("status count: %u/%u", tmp, op->nr_files);
1806		if (tmp != op->nr_files)
1807			return afs_protocol_error(call, afs_eproto_ibulkst_count);
1808
1809		call->count = 0;
1810		call->unmarshall++;
1811	more_counts:
1812		afs_extract_to_buf(call, 21 * sizeof(__be32));
1813		fallthrough;
1814
1815	case 2:
1816		_debug("extract status array %u", call->count);
1817		ret = afs_extract_data(call, true);
1818		if (ret < 0)
1819			return ret;
1820
1821		switch (call->count) {
1822		case 0:
1823			scb = &op->file[0].scb;
1824			break;
1825		case 1:
1826			scb = &op->file[1].scb;
1827			break;
1828		default:
1829			scb = &op->more_files[call->count - 2].scb;
1830			break;
1831		}
1832
1833		bp = call->buffer;
1834		xdr_decode_AFSFetchStatus(&bp, call, scb);
1835
1836		call->count++;
1837		if (call->count < op->nr_files)
1838			goto more_counts;
1839
1840		call->count = 0;
1841		call->unmarshall++;
1842		afs_extract_to_tmp(call);
1843		fallthrough;
1844
1845		/* Extract the callback count and array in two steps */
1846	case 3:
1847		_debug("extract CB count");
1848		ret = afs_extract_data(call, true);
1849		if (ret < 0)
1850			return ret;
1851
1852		tmp = ntohl(call->tmp);
1853		_debug("CB count: %u", tmp);
1854		if (tmp != op->nr_files)
1855			return afs_protocol_error(call, afs_eproto_ibulkst_cb_count);
1856		call->count = 0;
1857		call->unmarshall++;
1858	more_cbs:
1859		afs_extract_to_buf(call, 3 * sizeof(__be32));
1860		fallthrough;
1861
1862	case 4:
1863		_debug("extract CB array");
1864		ret = afs_extract_data(call, true);
1865		if (ret < 0)
1866			return ret;
1867
1868		_debug("unmarshall CB array");
1869		switch (call->count) {
1870		case 0:
1871			scb = &op->file[0].scb;
1872			break;
1873		case 1:
1874			scb = &op->file[1].scb;
1875			break;
1876		default:
1877			scb = &op->more_files[call->count - 2].scb;
1878			break;
1879		}
1880
1881		bp = call->buffer;
1882		xdr_decode_AFSCallBack(&bp, call, scb);
1883		call->count++;
1884		if (call->count < op->nr_files)
1885			goto more_cbs;
1886
1887		afs_extract_to_buf(call, 6 * sizeof(__be32));
1888		call->unmarshall++;
1889		fallthrough;
1890
1891	case 5:
1892		ret = afs_extract_data(call, false);
1893		if (ret < 0)
1894			return ret;
1895
1896		bp = call->buffer;
1897		/* Unfortunately, prior to OpenAFS-1.6, volsync here is filled
1898		 * with rubbish.
1899		 */
1900		xdr_decode_AFSVolSync(&bp, NULL);
1901
1902		call->unmarshall++;
1903		fallthrough;
1904
1905	case 6:
1906		break;
1907	}
1908
1909	_leave(" = 0 [done]");
1910	return 0;
1911}
1912
1913static void afs_done_fs_inline_bulk_status(struct afs_call *call)
1914{
1915	if (call->error == -ECONNABORTED &&
1916	    call->abort_code == RX_INVALID_OPERATION) {
1917		set_bit(AFS_SERVER_FL_NO_IBULK, &call->server->flags);
1918		if (call->op)
1919			set_bit(AFS_VOLUME_MAYBE_NO_IBULK, &call->op->volume->flags);
1920	}
1921}
1922
1923/*
1924 * FS.InlineBulkStatus operation type
1925 */
1926static const struct afs_call_type afs_RXFSInlineBulkStatus = {
1927	.name		= "FS.InlineBulkStatus",
1928	.op		= afs_FS_InlineBulkStatus,
1929	.deliver	= afs_deliver_fs_inline_bulk_status,
1930	.done		= afs_done_fs_inline_bulk_status,
1931	.destructor	= afs_flat_call_destructor,
1932};
1933
1934/*
1935 * Fetch the status information for up to 50 files
1936 */
1937void afs_fs_inline_bulk_status(struct afs_operation *op)
1938{
1939	struct afs_vnode_param *dvp = &op->file[0];
1940	struct afs_vnode_param *vp = &op->file[1];
1941	struct afs_call *call;
1942	__be32 *bp;
1943	int i;
1944
1945	if (test_bit(AFS_SERVER_FL_NO_IBULK, &op->server->flags)) {
1946		afs_op_set_error(op, -ENOTSUPP);
1947		return;
1948	}
1949
1950	_enter(",%x,{%llx:%llu},%u",
1951	       key_serial(op->key), vp->fid.vid, vp->fid.vnode, op->nr_files);
1952
1953	call = afs_alloc_flat_call(op->net, &afs_RXFSInlineBulkStatus,
1954				   (2 + op->nr_files * 3) * 4,
1955				   21 * 4);
1956	if (!call)
1957		return afs_op_nomem(op);
1958
1959	/* marshall the parameters */
1960	bp = call->request;
1961	*bp++ = htonl(FSINLINEBULKSTATUS);
1962	*bp++ = htonl(op->nr_files);
1963	*bp++ = htonl(dvp->fid.vid);
1964	*bp++ = htonl(dvp->fid.vnode);
1965	*bp++ = htonl(dvp->fid.unique);
1966	*bp++ = htonl(vp->fid.vid);
1967	*bp++ = htonl(vp->fid.vnode);
1968	*bp++ = htonl(vp->fid.unique);
1969	for (i = 0; i < op->nr_files - 2; i++) {
1970		*bp++ = htonl(op->more_files[i].fid.vid);
1971		*bp++ = htonl(op->more_files[i].fid.vnode);
1972		*bp++ = htonl(op->more_files[i].fid.unique);
1973	}
1974
1975	call->fid = vp->fid;
1976	trace_afs_make_fs_call(call, &vp->fid);
1977	afs_make_op_call(op, call, GFP_NOFS);
1978}
1979
1980/*
1981 * deliver reply data to an FS.FetchACL
1982 */
1983static int afs_deliver_fs_fetch_acl(struct afs_call *call)
1984{
1985	struct afs_operation *op = call->op;
1986	struct afs_vnode_param *vp = &op->file[0];
1987	struct afs_acl *acl;
1988	const __be32 *bp;
1989	unsigned int size;
1990	int ret;
1991
1992	_enter("{%u}", call->unmarshall);
1993
1994	switch (call->unmarshall) {
1995	case 0:
1996		afs_extract_to_tmp(call);
1997		call->unmarshall++;
1998		fallthrough;
1999
2000		/* extract the returned data length */
2001	case 1:
2002		ret = afs_extract_data(call, true);
2003		if (ret < 0)
2004			return ret;
2005
2006		size = call->count2 = ntohl(call->tmp);
2007		size = round_up(size, 4);
2008
2009		acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
2010		if (!acl)
2011			return -ENOMEM;
2012		op->acl = acl;
2013		acl->size = call->count2;
2014		afs_extract_begin(call, acl->data, size);
2015		call->unmarshall++;
2016		fallthrough;
2017
2018		/* extract the returned data */
2019	case 2:
2020		ret = afs_extract_data(call, true);
2021		if (ret < 0)
2022			return ret;
2023
2024		afs_extract_to_buf(call, (21 + 6) * 4);
2025		call->unmarshall++;
2026		fallthrough;
2027
2028		/* extract the metadata */
2029	case 3:
2030		ret = afs_extract_data(call, false);
2031		if (ret < 0)
2032			return ret;
2033
2034		bp = call->buffer;
2035		xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
2036		xdr_decode_AFSVolSync(&bp, &op->volsync);
2037
2038		call->unmarshall++;
2039		fallthrough;
2040
2041	case 4:
2042		break;
2043	}
2044
2045	_leave(" = 0 [done]");
2046	return 0;
2047}
2048
2049/*
2050 * FS.FetchACL operation type
2051 */
2052static const struct afs_call_type afs_RXFSFetchACL = {
2053	.name		= "FS.FetchACL",
2054	.op		= afs_FS_FetchACL,
2055	.deliver	= afs_deliver_fs_fetch_acl,
2056};
2057
2058/*
2059 * Fetch the ACL for a file.
2060 */
2061void afs_fs_fetch_acl(struct afs_operation *op)
2062{
2063	struct afs_vnode_param *vp = &op->file[0];
2064	struct afs_call *call;
2065	__be32 *bp;
2066
2067	_enter(",%x,{%llx:%llu},,",
2068	       key_serial(op->key), vp->fid.vid, vp->fid.vnode);
2069
2070	call = afs_alloc_flat_call(op->net, &afs_RXFSFetchACL, 16, (21 + 6) * 4);
2071	if (!call)
2072		return afs_op_nomem(op);
 
2073
2074	/* marshall the parameters */
2075	bp = call->request;
2076	bp[0] = htonl(FSFETCHACL);
2077	bp[1] = htonl(vp->fid.vid);
2078	bp[2] = htonl(vp->fid.vnode);
2079	bp[3] = htonl(vp->fid.unique);
2080
2081	call->fid = vp->fid;
2082	trace_afs_make_fs_call(call, &vp->fid);
2083	afs_make_op_call(op, call, GFP_KERNEL);
2084}
2085
2086/*
2087 * FS.StoreACL operation type
2088 */
2089static const struct afs_call_type afs_RXFSStoreACL = {
2090	.name		= "FS.StoreACL",
2091	.op		= afs_FS_StoreACL,
2092	.deliver	= afs_deliver_fs_file_status_and_vol,
2093	.destructor	= afs_flat_call_destructor,
2094};
2095
2096/*
2097 * Fetch the ACL for a file.
2098 */
2099void afs_fs_store_acl(struct afs_operation *op)
2100{
2101	struct afs_vnode_param *vp = &op->file[0];
2102	struct afs_call *call;
2103	const struct afs_acl *acl = op->acl;
2104	size_t size;
2105	__be32 *bp;
2106
2107	_enter(",%x,{%llx:%llu},,",
2108	       key_serial(op->key), vp->fid.vid, vp->fid.vnode);
2109
2110	size = round_up(acl->size, 4);
2111	call = afs_alloc_flat_call(op->net, &afs_RXFSStoreACL,
2112				   5 * 4 + size, (21 + 6) * 4);
2113	if (!call)
2114		return afs_op_nomem(op);
2115
2116	/* marshall the parameters */
2117	bp = call->request;
2118	bp[0] = htonl(FSSTOREACL);
2119	bp[1] = htonl(vp->fid.vid);
2120	bp[2] = htonl(vp->fid.vnode);
2121	bp[3] = htonl(vp->fid.unique);
2122	bp[4] = htonl(acl->size);
2123	memcpy(&bp[5], acl->data, acl->size);
2124	if (acl->size != size)
2125		memset((void *)&bp[5] + acl->size, 0, size - acl->size);
2126
2127	call->fid = vp->fid;
2128	trace_afs_make_fs_call(call, &vp->fid);
2129	afs_make_op_call(op, call, GFP_KERNEL);
2130}