xref: /openbmc/linux/fs/afs/yfsclient.c (revision 7903192c)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* YFS File Server client stubs
3  *
4  * Copyright (C) 2018 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 "internal.h"
14 #include "afs_fs.h"
15 #include "xdr_fs.h"
16 #include "protocol_yfs.h"
17 
18 #define xdr_size(x) (sizeof(*x) / sizeof(__be32))
19 
xdr_decode_YFSFid(const __be32 ** _bp,struct afs_fid * fid)20 static void xdr_decode_YFSFid(const __be32 **_bp, struct afs_fid *fid)
21 {
22 	const struct yfs_xdr_YFSFid *x = (const void *)*_bp;
23 
24 	fid->vid	= xdr_to_u64(x->volume);
25 	fid->vnode	= xdr_to_u64(x->vnode.lo);
26 	fid->vnode_hi	= ntohl(x->vnode.hi);
27 	fid->unique	= ntohl(x->vnode.unique);
28 	*_bp += xdr_size(x);
29 }
30 
xdr_encode_u32(__be32 * bp,u32 n)31 static __be32 *xdr_encode_u32(__be32 *bp, u32 n)
32 {
33 	*bp++ = htonl(n);
34 	return bp;
35 }
36 
xdr_encode_u64(__be32 * bp,u64 n)37 static __be32 *xdr_encode_u64(__be32 *bp, u64 n)
38 {
39 	struct yfs_xdr_u64 *x = (void *)bp;
40 
41 	*x = u64_to_xdr(n);
42 	return bp + xdr_size(x);
43 }
44 
xdr_encode_YFSFid(__be32 * bp,struct afs_fid * fid)45 static __be32 *xdr_encode_YFSFid(__be32 *bp, struct afs_fid *fid)
46 {
47 	struct yfs_xdr_YFSFid *x = (void *)bp;
48 
49 	x->volume	= u64_to_xdr(fid->vid);
50 	x->vnode.lo	= u64_to_xdr(fid->vnode);
51 	x->vnode.hi	= htonl(fid->vnode_hi);
52 	x->vnode.unique	= htonl(fid->unique);
53 	return bp + xdr_size(x);
54 }
55 
xdr_strlen(unsigned int len)56 static size_t xdr_strlen(unsigned int len)
57 {
58 	return sizeof(__be32) + round_up(len, sizeof(__be32));
59 }
60 
xdr_encode_string(__be32 * bp,const char * p,unsigned int len)61 static __be32 *xdr_encode_string(__be32 *bp, const char *p, unsigned int len)
62 {
63 	bp = xdr_encode_u32(bp, len);
64 	bp = memcpy(bp, p, len);
65 	if (len & 3) {
66 		unsigned int pad = 4 - (len & 3);
67 
68 		memset((u8 *)bp + len, 0, pad);
69 		len += pad;
70 	}
71 
72 	return bp + len / sizeof(__be32);
73 }
74 
xdr_encode_name(__be32 * bp,const struct qstr * p)75 static __be32 *xdr_encode_name(__be32 *bp, const struct qstr *p)
76 {
77 	return xdr_encode_string(bp, p->name, p->len);
78 }
79 
linux_to_yfs_time(const struct timespec64 * t)80 static s64 linux_to_yfs_time(const struct timespec64 *t)
81 {
82 	/* Convert to 100ns intervals. */
83 	return (u64)t->tv_sec * 10000000 + t->tv_nsec/100;
84 }
85 
xdr_encode_YFSStoreStatus(__be32 * bp,mode_t * mode,const struct timespec64 * t)86 static __be32 *xdr_encode_YFSStoreStatus(__be32 *bp, mode_t *mode,
87 					 const struct timespec64 *t)
88 {
89 	struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
90 	mode_t masked_mode = mode ? *mode & S_IALLUGO : 0;
91 	s64 mtime = linux_to_yfs_time(t);
92 	u32 mask = AFS_SET_MTIME;
93 
94 	mask |= mode ? AFS_SET_MODE : 0;
95 
96 	x->mask		= htonl(mask);
97 	x->mode		= htonl(masked_mode);
98 	x->mtime_client	= u64_to_xdr(mtime);
99 	x->owner	= u64_to_xdr(0);
100 	x->group	= u64_to_xdr(0);
101 	return bp + xdr_size(x);
102 }
103 
104 /*
105  * Convert a signed 100ns-resolution 64-bit time into a timespec.
106  */
yfs_time_to_linux(s64 t)107 static struct timespec64 yfs_time_to_linux(s64 t)
108 {
109 	struct timespec64 ts;
110 	u64 abs_t;
111 
112 	/*
113 	 * Unfortunately can not use normal 64 bit division on 32 bit arch, but
114 	 * the alternative, do_div, does not work with negative numbers so have
115 	 * to special case them
116 	 */
117 	if (t < 0) {
118 		abs_t = -t;
119 		ts.tv_nsec = (time64_t)(do_div(abs_t, 10000000) * 100);
120 		ts.tv_nsec = -ts.tv_nsec;
121 		ts.tv_sec = -abs_t;
122 	} else {
123 		abs_t = t;
124 		ts.tv_nsec = (time64_t)do_div(abs_t, 10000000) * 100;
125 		ts.tv_sec = abs_t;
126 	}
127 
128 	return ts;
129 }
130 
xdr_to_time(const struct yfs_xdr_u64 xdr)131 static struct timespec64 xdr_to_time(const struct yfs_xdr_u64 xdr)
132 {
133 	s64 t = xdr_to_u64(xdr);
134 
135 	return yfs_time_to_linux(t);
136 }
137 
yfs_check_req(struct afs_call * call,__be32 * bp)138 static void yfs_check_req(struct afs_call *call, __be32 *bp)
139 {
140 	size_t len = (void *)bp - call->request;
141 
142 	if (len > call->request_size)
143 		pr_err("kAFS: %s: Request buffer overflow (%zu>%u)\n",
144 		       call->type->name, len, call->request_size);
145 	else if (len < call->request_size)
146 		pr_warn("kAFS: %s: Request buffer underflow (%zu<%u)\n",
147 			call->type->name, len, call->request_size);
148 }
149 
150 /*
151  * Dump a bad file status record.
152  */
xdr_dump_bad(const __be32 * bp)153 static void xdr_dump_bad(const __be32 *bp)
154 {
155 	__be32 x[4];
156 	int i;
157 
158 	pr_notice("YFS XDR: Bad status record\n");
159 	for (i = 0; i < 6 * 4 * 4; i += 16) {
160 		memcpy(x, bp, 16);
161 		bp += 4;
162 		pr_notice("%03x: %08x %08x %08x %08x\n",
163 			  i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
164 	}
165 
166 	memcpy(x, bp, 8);
167 	pr_notice("0x60: %08x %08x\n", ntohl(x[0]), ntohl(x[1]));
168 }
169 
170 /*
171  * Decode a YFSFetchStatus block
172  */
xdr_decode_YFSFetchStatus(const __be32 ** _bp,struct afs_call * call,struct afs_status_cb * scb)173 static void xdr_decode_YFSFetchStatus(const __be32 **_bp,
174 				      struct afs_call *call,
175 				      struct afs_status_cb *scb)
176 {
177 	const struct yfs_xdr_YFSFetchStatus *xdr = (const void *)*_bp;
178 	struct afs_file_status *status = &scb->status;
179 	u32 type;
180 
181 	status->abort_code = ntohl(xdr->abort_code);
182 	if (status->abort_code != 0) {
183 		if (status->abort_code == VNOVNODE)
184 			status->nlink = 0;
185 		scb->have_error = true;
186 		goto advance;
187 	}
188 
189 	type = ntohl(xdr->type);
190 	switch (type) {
191 	case AFS_FTYPE_FILE:
192 	case AFS_FTYPE_DIR:
193 	case AFS_FTYPE_SYMLINK:
194 		status->type = type;
195 		break;
196 	default:
197 		goto bad;
198 	}
199 
200 	status->nlink		= ntohl(xdr->nlink);
201 	status->author		= xdr_to_u64(xdr->author);
202 	status->owner		= xdr_to_u64(xdr->owner);
203 	status->caller_access	= ntohl(xdr->caller_access); /* Ticket dependent */
204 	status->anon_access	= ntohl(xdr->anon_access);
205 	status->mode		= ntohl(xdr->mode) & S_IALLUGO;
206 	status->group		= xdr_to_u64(xdr->group);
207 	status->lock_count	= ntohl(xdr->lock_count);
208 
209 	status->mtime_client	= xdr_to_time(xdr->mtime_client);
210 	status->mtime_server	= xdr_to_time(xdr->mtime_server);
211 	status->size		= xdr_to_u64(xdr->size);
212 	status->data_version	= xdr_to_u64(xdr->data_version);
213 	scb->have_status	= true;
214 advance:
215 	*_bp += xdr_size(xdr);
216 	return;
217 
218 bad:
219 	xdr_dump_bad(*_bp);
220 	afs_protocol_error(call, afs_eproto_bad_status);
221 	goto advance;
222 }
223 
224 /*
225  * Decode a YFSCallBack block
226  */
xdr_decode_YFSCallBack(const __be32 ** _bp,struct afs_call * call,struct afs_status_cb * scb)227 static void xdr_decode_YFSCallBack(const __be32 **_bp,
228 				   struct afs_call *call,
229 				   struct afs_status_cb *scb)
230 {
231 	struct yfs_xdr_YFSCallBack *x = (void *)*_bp;
232 	struct afs_callback *cb = &scb->callback;
233 	ktime_t cb_expiry;
234 
235 	cb_expiry = ktime_add(call->issue_time, xdr_to_u64(x->expiration_time) * 100);
236 	cb->expires_at	= ktime_divns(cb_expiry, NSEC_PER_SEC);
237 	scb->have_cb	= true;
238 	*_bp += xdr_size(x);
239 }
240 
241 /*
242  * Decode a YFSVolSync block
243  */
xdr_decode_YFSVolSync(const __be32 ** _bp,struct afs_volsync * volsync)244 static void xdr_decode_YFSVolSync(const __be32 **_bp,
245 				  struct afs_volsync *volsync)
246 {
247 	struct yfs_xdr_YFSVolSync *x = (void *)*_bp;
248 	u64 creation;
249 
250 	if (volsync) {
251 		creation = xdr_to_u64(x->vol_creation_date);
252 		do_div(creation, 10 * 1000 * 1000);
253 		volsync->creation = creation;
254 	}
255 
256 	*_bp += xdr_size(x);
257 }
258 
259 /*
260  * Encode the requested attributes into a YFSStoreStatus block
261  */
xdr_encode_YFS_StoreStatus(__be32 * bp,struct iattr * attr)262 static __be32 *xdr_encode_YFS_StoreStatus(__be32 *bp, struct iattr *attr)
263 {
264 	struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
265 	s64 mtime = 0, owner = 0, group = 0;
266 	u32 mask = 0, mode = 0;
267 
268 	mask = 0;
269 	if (attr->ia_valid & ATTR_MTIME) {
270 		mask |= AFS_SET_MTIME;
271 		mtime = linux_to_yfs_time(&attr->ia_mtime);
272 	}
273 
274 	if (attr->ia_valid & ATTR_UID) {
275 		mask |= AFS_SET_OWNER;
276 		owner = from_kuid(&init_user_ns, attr->ia_uid);
277 	}
278 
279 	if (attr->ia_valid & ATTR_GID) {
280 		mask |= AFS_SET_GROUP;
281 		group = from_kgid(&init_user_ns, attr->ia_gid);
282 	}
283 
284 	if (attr->ia_valid & ATTR_MODE) {
285 		mask |= AFS_SET_MODE;
286 		mode = attr->ia_mode & S_IALLUGO;
287 	}
288 
289 	x->mask		= htonl(mask);
290 	x->mode		= htonl(mode);
291 	x->mtime_client	= u64_to_xdr(mtime);
292 	x->owner	= u64_to_xdr(owner);
293 	x->group	= u64_to_xdr(group);
294 	return bp + xdr_size(x);
295 }
296 
297 /*
298  * Decode a YFSFetchVolumeStatus block.
299  */
xdr_decode_YFSFetchVolumeStatus(const __be32 ** _bp,struct afs_volume_status * vs)300 static void xdr_decode_YFSFetchVolumeStatus(const __be32 **_bp,
301 					    struct afs_volume_status *vs)
302 {
303 	const struct yfs_xdr_YFSFetchVolumeStatus *x = (const void *)*_bp;
304 	u32 flags;
305 
306 	vs->vid			= xdr_to_u64(x->vid);
307 	vs->parent_id		= xdr_to_u64(x->parent_id);
308 	flags			= ntohl(x->flags);
309 	vs->online		= flags & yfs_FVSOnline;
310 	vs->in_service		= flags & yfs_FVSInservice;
311 	vs->blessed		= flags & yfs_FVSBlessed;
312 	vs->needs_salvage	= flags & yfs_FVSNeedsSalvage;
313 	vs->type		= ntohl(x->type);
314 	vs->min_quota		= 0;
315 	vs->max_quota		= xdr_to_u64(x->max_quota);
316 	vs->blocks_in_use	= xdr_to_u64(x->blocks_in_use);
317 	vs->part_blocks_avail	= xdr_to_u64(x->part_blocks_avail);
318 	vs->part_max_blocks	= xdr_to_u64(x->part_max_blocks);
319 	vs->vol_copy_date	= xdr_to_u64(x->vol_copy_date);
320 	vs->vol_backup_date	= xdr_to_u64(x->vol_backup_date);
321 	*_bp += sizeof(*x) / sizeof(__be32);
322 }
323 
324 /*
325  * Deliver reply data to operations that just return a file status and a volume
326  * sync record.
327  */
yfs_deliver_status_and_volsync(struct afs_call * call)328 static int yfs_deliver_status_and_volsync(struct afs_call *call)
329 {
330 	struct afs_operation *op = call->op;
331 	const __be32 *bp;
332 	int ret;
333 
334 	ret = afs_transfer_reply(call);
335 	if (ret < 0)
336 		return ret;
337 
338 	bp = call->buffer;
339 	xdr_decode_YFSFetchStatus(&bp, call, &op->file[0].scb);
340 	xdr_decode_YFSVolSync(&bp, &op->volsync);
341 
342 	_leave(" = 0 [done]");
343 	return 0;
344 }
345 
346 /*
347  * Deliver reply data to an YFS.FetchData64.
348  */
yfs_deliver_fs_fetch_data64(struct afs_call * call)349 static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
350 {
351 	struct afs_operation *op = call->op;
352 	struct afs_vnode_param *vp = &op->file[0];
353 	struct afs_read *req = op->fetch.req;
354 	const __be32 *bp;
355 	int ret;
356 
357 	_enter("{%u,%zu, %zu/%llu}",
358 	       call->unmarshall, call->iov_len, iov_iter_count(call->iter),
359 	       req->actual_len);
360 
361 	switch (call->unmarshall) {
362 	case 0:
363 		req->actual_len = 0;
364 		afs_extract_to_tmp64(call);
365 		call->unmarshall++;
366 		fallthrough;
367 
368 		/* Extract the returned data length into ->actual_len.  This
369 		 * may indicate more or less data than was requested will be
370 		 * returned.
371 		 */
372 	case 1:
373 		_debug("extract data length");
374 		ret = afs_extract_data(call, true);
375 		if (ret < 0)
376 			return ret;
377 
378 		req->actual_len = be64_to_cpu(call->tmp64);
379 		_debug("DATA length: %llu", req->actual_len);
380 
381 		if (req->actual_len == 0)
382 			goto no_more_data;
383 
384 		call->iter = req->iter;
385 		call->iov_len = min(req->actual_len, req->len);
386 		call->unmarshall++;
387 		fallthrough;
388 
389 		/* extract the returned data */
390 	case 2:
391 		_debug("extract data %zu/%llu",
392 		       iov_iter_count(call->iter), req->actual_len);
393 
394 		ret = afs_extract_data(call, true);
395 		if (ret < 0)
396 			return ret;
397 
398 		call->iter = &call->def_iter;
399 		if (req->actual_len <= req->len)
400 			goto no_more_data;
401 
402 		/* Discard any excess data the server gave us */
403 		afs_extract_discard(call, req->actual_len - req->len);
404 		call->unmarshall = 3;
405 		fallthrough;
406 
407 	case 3:
408 		_debug("extract discard %zu/%llu",
409 		       iov_iter_count(call->iter), req->actual_len - req->len);
410 
411 		ret = afs_extract_data(call, true);
412 		if (ret < 0)
413 			return ret;
414 
415 	no_more_data:
416 		call->unmarshall = 4;
417 		afs_extract_to_buf(call,
418 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
419 				   sizeof(struct yfs_xdr_YFSCallBack) +
420 				   sizeof(struct yfs_xdr_YFSVolSync));
421 		fallthrough;
422 
423 		/* extract the metadata */
424 	case 4:
425 		ret = afs_extract_data(call, false);
426 		if (ret < 0)
427 			return ret;
428 
429 		bp = call->buffer;
430 		xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
431 		xdr_decode_YFSCallBack(&bp, call, &vp->scb);
432 		xdr_decode_YFSVolSync(&bp, &op->volsync);
433 
434 		req->data_version = vp->scb.status.data_version;
435 		req->file_size = vp->scb.status.size;
436 
437 		call->unmarshall++;
438 		fallthrough;
439 
440 	case 5:
441 		break;
442 	}
443 
444 	_leave(" = 0 [done]");
445 	return 0;
446 }
447 
448 /*
449  * YFS.FetchData64 operation type
450  */
451 static const struct afs_call_type yfs_RXYFSFetchData64 = {
452 	.name		= "YFS.FetchData64",
453 	.op		= yfs_FS_FetchData64,
454 	.deliver	= yfs_deliver_fs_fetch_data64,
455 	.destructor	= afs_flat_call_destructor,
456 };
457 
458 /*
459  * Fetch data from a file.
460  */
yfs_fs_fetch_data(struct afs_operation * op)461 void yfs_fs_fetch_data(struct afs_operation *op)
462 {
463 	struct afs_vnode_param *vp = &op->file[0];
464 	struct afs_read *req = op->fetch.req;
465 	struct afs_call *call;
466 	__be32 *bp;
467 
468 	_enter(",%x,{%llx:%llu},%llx,%llx",
469 	       key_serial(op->key), vp->fid.vid, vp->fid.vnode,
470 	       req->pos, req->len);
471 
472 	call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchData64,
473 				   sizeof(__be32) * 2 +
474 				   sizeof(struct yfs_xdr_YFSFid) +
475 				   sizeof(struct yfs_xdr_u64) * 2,
476 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
477 				   sizeof(struct yfs_xdr_YFSCallBack) +
478 				   sizeof(struct yfs_xdr_YFSVolSync));
479 	if (!call)
480 		return afs_op_nomem(op);
481 
482 	req->call_debug_id = call->debug_id;
483 
484 	/* marshall the parameters */
485 	bp = call->request;
486 	bp = xdr_encode_u32(bp, YFSFETCHDATA64);
487 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
488 	bp = xdr_encode_YFSFid(bp, &vp->fid);
489 	bp = xdr_encode_u64(bp, req->pos);
490 	bp = xdr_encode_u64(bp, req->len);
491 	yfs_check_req(call, bp);
492 
493 	trace_afs_make_fs_call(call, &vp->fid);
494 	afs_make_op_call(op, call, GFP_NOFS);
495 }
496 
497 /*
498  * Deliver reply data for YFS.CreateFile or YFS.MakeDir.
499  */
yfs_deliver_fs_create_vnode(struct afs_call * call)500 static int yfs_deliver_fs_create_vnode(struct afs_call *call)
501 {
502 	struct afs_operation *op = call->op;
503 	struct afs_vnode_param *dvp = &op->file[0];
504 	struct afs_vnode_param *vp = &op->file[1];
505 	const __be32 *bp;
506 	int ret;
507 
508 	_enter("{%u}", call->unmarshall);
509 
510 	ret = afs_transfer_reply(call);
511 	if (ret < 0)
512 		return ret;
513 
514 	/* unmarshall the reply once we've received all of it */
515 	bp = call->buffer;
516 	xdr_decode_YFSFid(&bp, &op->file[1].fid);
517 	xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
518 	xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
519 	xdr_decode_YFSCallBack(&bp, call, &vp->scb);
520 	xdr_decode_YFSVolSync(&bp, &op->volsync);
521 
522 	_leave(" = 0 [done]");
523 	return 0;
524 }
525 
526 /*
527  * FS.CreateFile and FS.MakeDir operation type
528  */
529 static const struct afs_call_type afs_RXFSCreateFile = {
530 	.name		= "YFS.CreateFile",
531 	.op		= yfs_FS_CreateFile,
532 	.deliver	= yfs_deliver_fs_create_vnode,
533 	.destructor	= afs_flat_call_destructor,
534 };
535 
536 /*
537  * Create a file.
538  */
yfs_fs_create_file(struct afs_operation * op)539 void yfs_fs_create_file(struct afs_operation *op)
540 {
541 	const struct qstr *name = &op->dentry->d_name;
542 	struct afs_vnode_param *dvp = &op->file[0];
543 	struct afs_call *call;
544 	size_t reqsz, rplsz;
545 	__be32 *bp;
546 
547 	_enter("");
548 
549 	reqsz = (sizeof(__be32) +
550 		 sizeof(__be32) +
551 		 sizeof(struct yfs_xdr_YFSFid) +
552 		 xdr_strlen(name->len) +
553 		 sizeof(struct yfs_xdr_YFSStoreStatus) +
554 		 sizeof(__be32));
555 	rplsz = (sizeof(struct yfs_xdr_YFSFid) +
556 		 sizeof(struct yfs_xdr_YFSFetchStatus) +
557 		 sizeof(struct yfs_xdr_YFSFetchStatus) +
558 		 sizeof(struct yfs_xdr_YFSCallBack) +
559 		 sizeof(struct yfs_xdr_YFSVolSync));
560 
561 	call = afs_alloc_flat_call(op->net, &afs_RXFSCreateFile, reqsz, rplsz);
562 	if (!call)
563 		return afs_op_nomem(op);
564 
565 	/* marshall the parameters */
566 	bp = call->request;
567 	bp = xdr_encode_u32(bp, YFSCREATEFILE);
568 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
569 	bp = xdr_encode_YFSFid(bp, &dvp->fid);
570 	bp = xdr_encode_name(bp, name);
571 	bp = xdr_encode_YFSStoreStatus(bp, &op->create.mode, &op->mtime);
572 	bp = xdr_encode_u32(bp, yfs_LockNone); /* ViceLockType */
573 	yfs_check_req(call, bp);
574 
575 	trace_afs_make_fs_call1(call, &dvp->fid, name);
576 	afs_make_op_call(op, call, GFP_NOFS);
577 }
578 
579 static const struct afs_call_type yfs_RXFSMakeDir = {
580 	.name		= "YFS.MakeDir",
581 	.op		= yfs_FS_MakeDir,
582 	.deliver	= yfs_deliver_fs_create_vnode,
583 	.destructor	= afs_flat_call_destructor,
584 };
585 
586 /*
587  * Make a directory.
588  */
yfs_fs_make_dir(struct afs_operation * op)589 void yfs_fs_make_dir(struct afs_operation *op)
590 {
591 	const struct qstr *name = &op->dentry->d_name;
592 	struct afs_vnode_param *dvp = &op->file[0];
593 	struct afs_call *call;
594 	size_t reqsz, rplsz;
595 	__be32 *bp;
596 
597 	_enter("");
598 
599 	reqsz = (sizeof(__be32) +
600 		 sizeof(struct yfs_xdr_RPCFlags) +
601 		 sizeof(struct yfs_xdr_YFSFid) +
602 		 xdr_strlen(name->len) +
603 		 sizeof(struct yfs_xdr_YFSStoreStatus));
604 	rplsz = (sizeof(struct yfs_xdr_YFSFid) +
605 		 sizeof(struct yfs_xdr_YFSFetchStatus) +
606 		 sizeof(struct yfs_xdr_YFSFetchStatus) +
607 		 sizeof(struct yfs_xdr_YFSCallBack) +
608 		 sizeof(struct yfs_xdr_YFSVolSync));
609 
610 	call = afs_alloc_flat_call(op->net, &yfs_RXFSMakeDir, reqsz, rplsz);
611 	if (!call)
612 		return afs_op_nomem(op);
613 
614 	/* marshall the parameters */
615 	bp = call->request;
616 	bp = xdr_encode_u32(bp, YFSMAKEDIR);
617 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
618 	bp = xdr_encode_YFSFid(bp, &dvp->fid);
619 	bp = xdr_encode_name(bp, name);
620 	bp = xdr_encode_YFSStoreStatus(bp, &op->create.mode, &op->mtime);
621 	yfs_check_req(call, bp);
622 
623 	trace_afs_make_fs_call1(call, &dvp->fid, name);
624 	afs_make_op_call(op, call, GFP_NOFS);
625 }
626 
627 /*
628  * Deliver reply data to a YFS.RemoveFile2 operation.
629  */
yfs_deliver_fs_remove_file2(struct afs_call * call)630 static int yfs_deliver_fs_remove_file2(struct afs_call *call)
631 {
632 	struct afs_operation *op = call->op;
633 	struct afs_vnode_param *dvp = &op->file[0];
634 	struct afs_vnode_param *vp = &op->file[1];
635 	struct afs_fid fid;
636 	const __be32 *bp;
637 	int ret;
638 
639 	_enter("{%u}", call->unmarshall);
640 
641 	ret = afs_transfer_reply(call);
642 	if (ret < 0)
643 		return ret;
644 
645 	bp = call->buffer;
646 	xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
647 	xdr_decode_YFSFid(&bp, &fid);
648 	xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
649 	/* Was deleted if vnode->status.abort_code == VNOVNODE. */
650 
651 	xdr_decode_YFSVolSync(&bp, &op->volsync);
652 	return 0;
653 }
654 
yfs_done_fs_remove_file2(struct afs_call * call)655 static void yfs_done_fs_remove_file2(struct afs_call *call)
656 {
657 	if (call->error == -ECONNABORTED &&
658 	    call->abort_code == RX_INVALID_OPERATION) {
659 		set_bit(AFS_SERVER_FL_NO_RM2, &call->server->flags);
660 		call->op->flags |= AFS_OPERATION_DOWNGRADE;
661 	}
662 }
663 
664 /*
665  * YFS.RemoveFile2 operation type.
666  */
667 static const struct afs_call_type yfs_RXYFSRemoveFile2 = {
668 	.name		= "YFS.RemoveFile2",
669 	.op		= yfs_FS_RemoveFile2,
670 	.deliver	= yfs_deliver_fs_remove_file2,
671 	.done		= yfs_done_fs_remove_file2,
672 	.destructor	= afs_flat_call_destructor,
673 };
674 
675 /*
676  * Remove a file and retrieve new file status.
677  */
yfs_fs_remove_file2(struct afs_operation * op)678 void yfs_fs_remove_file2(struct afs_operation *op)
679 {
680 	struct afs_vnode_param *dvp = &op->file[0];
681 	const struct qstr *name = &op->dentry->d_name;
682 	struct afs_call *call;
683 	__be32 *bp;
684 
685 	_enter("");
686 
687 	call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveFile2,
688 				   sizeof(__be32) +
689 				   sizeof(struct yfs_xdr_RPCFlags) +
690 				   sizeof(struct yfs_xdr_YFSFid) +
691 				   xdr_strlen(name->len),
692 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
693 				   sizeof(struct yfs_xdr_YFSFid) +
694 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
695 				   sizeof(struct yfs_xdr_YFSVolSync));
696 	if (!call)
697 		return afs_op_nomem(op);
698 
699 	/* marshall the parameters */
700 	bp = call->request;
701 	bp = xdr_encode_u32(bp, YFSREMOVEFILE2);
702 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
703 	bp = xdr_encode_YFSFid(bp, &dvp->fid);
704 	bp = xdr_encode_name(bp, name);
705 	yfs_check_req(call, bp);
706 
707 	trace_afs_make_fs_call1(call, &dvp->fid, name);
708 	afs_make_op_call(op, call, GFP_NOFS);
709 }
710 
711 /*
712  * Deliver reply data to a YFS.RemoveFile or YFS.RemoveDir operation.
713  */
yfs_deliver_fs_remove(struct afs_call * call)714 static int yfs_deliver_fs_remove(struct afs_call *call)
715 {
716 	struct afs_operation *op = call->op;
717 	struct afs_vnode_param *dvp = &op->file[0];
718 	const __be32 *bp;
719 	int ret;
720 
721 	_enter("{%u}", call->unmarshall);
722 
723 	ret = afs_transfer_reply(call);
724 	if (ret < 0)
725 		return ret;
726 
727 	bp = call->buffer;
728 	xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
729 	xdr_decode_YFSVolSync(&bp, &op->volsync);
730 	return 0;
731 }
732 
733 /*
734  * FS.RemoveDir and FS.RemoveFile operation types.
735  */
736 static const struct afs_call_type yfs_RXYFSRemoveFile = {
737 	.name		= "YFS.RemoveFile",
738 	.op		= yfs_FS_RemoveFile,
739 	.deliver	= yfs_deliver_fs_remove,
740 	.destructor	= afs_flat_call_destructor,
741 };
742 
743 /*
744  * Remove a file.
745  */
yfs_fs_remove_file(struct afs_operation * op)746 void yfs_fs_remove_file(struct afs_operation *op)
747 {
748 	const struct qstr *name = &op->dentry->d_name;
749 	struct afs_vnode_param *dvp = &op->file[0];
750 	struct afs_call *call;
751 	__be32 *bp;
752 
753 	_enter("");
754 
755 	if (!test_bit(AFS_SERVER_FL_NO_RM2, &op->server->flags))
756 		return yfs_fs_remove_file2(op);
757 
758 	call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveFile,
759 				   sizeof(__be32) +
760 				   sizeof(struct yfs_xdr_RPCFlags) +
761 				   sizeof(struct yfs_xdr_YFSFid) +
762 				   xdr_strlen(name->len),
763 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
764 				   sizeof(struct yfs_xdr_YFSVolSync));
765 	if (!call)
766 		return afs_op_nomem(op);
767 
768 	/* marshall the parameters */
769 	bp = call->request;
770 	bp = xdr_encode_u32(bp, YFSREMOVEFILE);
771 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
772 	bp = xdr_encode_YFSFid(bp, &dvp->fid);
773 	bp = xdr_encode_name(bp, name);
774 	yfs_check_req(call, bp);
775 
776 	trace_afs_make_fs_call1(call, &dvp->fid, name);
777 	afs_make_op_call(op, call, GFP_NOFS);
778 }
779 
780 static const struct afs_call_type yfs_RXYFSRemoveDir = {
781 	.name		= "YFS.RemoveDir",
782 	.op		= yfs_FS_RemoveDir,
783 	.deliver	= yfs_deliver_fs_remove,
784 	.destructor	= afs_flat_call_destructor,
785 };
786 
787 /*
788  * Remove a directory.
789  */
yfs_fs_remove_dir(struct afs_operation * op)790 void yfs_fs_remove_dir(struct afs_operation *op)
791 {
792 	const struct qstr *name = &op->dentry->d_name;
793 	struct afs_vnode_param *dvp = &op->file[0];
794 	struct afs_call *call;
795 	__be32 *bp;
796 
797 	_enter("");
798 
799 	call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveDir,
800 				   sizeof(__be32) +
801 				   sizeof(struct yfs_xdr_RPCFlags) +
802 				   sizeof(struct yfs_xdr_YFSFid) +
803 				   xdr_strlen(name->len),
804 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
805 				   sizeof(struct yfs_xdr_YFSVolSync));
806 	if (!call)
807 		return afs_op_nomem(op);
808 
809 	/* marshall the parameters */
810 	bp = call->request;
811 	bp = xdr_encode_u32(bp, YFSREMOVEDIR);
812 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
813 	bp = xdr_encode_YFSFid(bp, &dvp->fid);
814 	bp = xdr_encode_name(bp, name);
815 	yfs_check_req(call, bp);
816 
817 	trace_afs_make_fs_call1(call, &dvp->fid, name);
818 	afs_make_op_call(op, call, GFP_NOFS);
819 }
820 
821 /*
822  * Deliver reply data to a YFS.Link operation.
823  */
yfs_deliver_fs_link(struct afs_call * call)824 static int yfs_deliver_fs_link(struct afs_call *call)
825 {
826 	struct afs_operation *op = call->op;
827 	struct afs_vnode_param *dvp = &op->file[0];
828 	struct afs_vnode_param *vp = &op->file[1];
829 	const __be32 *bp;
830 	int ret;
831 
832 	_enter("{%u}", call->unmarshall);
833 
834 	ret = afs_transfer_reply(call);
835 	if (ret < 0)
836 		return ret;
837 
838 	bp = call->buffer;
839 	xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
840 	xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
841 	xdr_decode_YFSVolSync(&bp, &op->volsync);
842 	_leave(" = 0 [done]");
843 	return 0;
844 }
845 
846 /*
847  * YFS.Link operation type.
848  */
849 static const struct afs_call_type yfs_RXYFSLink = {
850 	.name		= "YFS.Link",
851 	.op		= yfs_FS_Link,
852 	.deliver	= yfs_deliver_fs_link,
853 	.destructor	= afs_flat_call_destructor,
854 };
855 
856 /*
857  * Make a hard link.
858  */
yfs_fs_link(struct afs_operation * op)859 void yfs_fs_link(struct afs_operation *op)
860 {
861 	const struct qstr *name = &op->dentry->d_name;
862 	struct afs_vnode_param *dvp = &op->file[0];
863 	struct afs_vnode_param *vp = &op->file[1];
864 	struct afs_call *call;
865 	__be32 *bp;
866 
867 	_enter("");
868 
869 	call = afs_alloc_flat_call(op->net, &yfs_RXYFSLink,
870 				   sizeof(__be32) +
871 				   sizeof(struct yfs_xdr_RPCFlags) +
872 				   sizeof(struct yfs_xdr_YFSFid) +
873 				   xdr_strlen(name->len) +
874 				   sizeof(struct yfs_xdr_YFSFid),
875 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
876 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
877 				   sizeof(struct yfs_xdr_YFSVolSync));
878 	if (!call)
879 		return afs_op_nomem(op);
880 
881 	/* marshall the parameters */
882 	bp = call->request;
883 	bp = xdr_encode_u32(bp, YFSLINK);
884 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
885 	bp = xdr_encode_YFSFid(bp, &dvp->fid);
886 	bp = xdr_encode_name(bp, name);
887 	bp = xdr_encode_YFSFid(bp, &vp->fid);
888 	yfs_check_req(call, bp);
889 
890 	trace_afs_make_fs_call1(call, &vp->fid, name);
891 	afs_make_op_call(op, call, GFP_NOFS);
892 }
893 
894 /*
895  * Deliver reply data to a YFS.Symlink operation.
896  */
yfs_deliver_fs_symlink(struct afs_call * call)897 static int yfs_deliver_fs_symlink(struct afs_call *call)
898 {
899 	struct afs_operation *op = call->op;
900 	struct afs_vnode_param *dvp = &op->file[0];
901 	struct afs_vnode_param *vp = &op->file[1];
902 	const __be32 *bp;
903 	int ret;
904 
905 	_enter("{%u}", call->unmarshall);
906 
907 	ret = afs_transfer_reply(call);
908 	if (ret < 0)
909 		return ret;
910 
911 	/* unmarshall the reply once we've received all of it */
912 	bp = call->buffer;
913 	xdr_decode_YFSFid(&bp, &vp->fid);
914 	xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
915 	xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
916 	xdr_decode_YFSVolSync(&bp, &op->volsync);
917 
918 	_leave(" = 0 [done]");
919 	return 0;
920 }
921 
922 /*
923  * YFS.Symlink operation type
924  */
925 static const struct afs_call_type yfs_RXYFSSymlink = {
926 	.name		= "YFS.Symlink",
927 	.op		= yfs_FS_Symlink,
928 	.deliver	= yfs_deliver_fs_symlink,
929 	.destructor	= afs_flat_call_destructor,
930 };
931 
932 /*
933  * Create a symbolic link.
934  */
yfs_fs_symlink(struct afs_operation * op)935 void yfs_fs_symlink(struct afs_operation *op)
936 {
937 	const struct qstr *name = &op->dentry->d_name;
938 	struct afs_vnode_param *dvp = &op->file[0];
939 	struct afs_call *call;
940 	size_t contents_sz;
941 	mode_t mode = 0777;
942 	__be32 *bp;
943 
944 	_enter("");
945 
946 	contents_sz = strlen(op->create.symlink);
947 	call = afs_alloc_flat_call(op->net, &yfs_RXYFSSymlink,
948 				   sizeof(__be32) +
949 				   sizeof(struct yfs_xdr_RPCFlags) +
950 				   sizeof(struct yfs_xdr_YFSFid) +
951 				   xdr_strlen(name->len) +
952 				   xdr_strlen(contents_sz) +
953 				   sizeof(struct yfs_xdr_YFSStoreStatus),
954 				   sizeof(struct yfs_xdr_YFSFid) +
955 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
956 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
957 				   sizeof(struct yfs_xdr_YFSVolSync));
958 	if (!call)
959 		return afs_op_nomem(op);
960 
961 	/* marshall the parameters */
962 	bp = call->request;
963 	bp = xdr_encode_u32(bp, YFSSYMLINK);
964 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
965 	bp = xdr_encode_YFSFid(bp, &dvp->fid);
966 	bp = xdr_encode_name(bp, name);
967 	bp = xdr_encode_string(bp, op->create.symlink, contents_sz);
968 	bp = xdr_encode_YFSStoreStatus(bp, &mode, &op->mtime);
969 	yfs_check_req(call, bp);
970 
971 	trace_afs_make_fs_call1(call, &dvp->fid, name);
972 	afs_make_op_call(op, call, GFP_NOFS);
973 }
974 
975 /*
976  * Deliver reply data to a YFS.Rename operation.
977  */
yfs_deliver_fs_rename(struct afs_call * call)978 static int yfs_deliver_fs_rename(struct afs_call *call)
979 {
980 	struct afs_operation *op = call->op;
981 	struct afs_vnode_param *orig_dvp = &op->file[0];
982 	struct afs_vnode_param *new_dvp = &op->file[1];
983 	const __be32 *bp;
984 	int ret;
985 
986 	_enter("{%u}", call->unmarshall);
987 
988 	ret = afs_transfer_reply(call);
989 	if (ret < 0)
990 		return ret;
991 
992 	bp = call->buffer;
993 	/* If the two dirs are the same, we have two copies of the same status
994 	 * report, so we just decode it twice.
995 	 */
996 	xdr_decode_YFSFetchStatus(&bp, call, &orig_dvp->scb);
997 	xdr_decode_YFSFetchStatus(&bp, call, &new_dvp->scb);
998 	xdr_decode_YFSVolSync(&bp, &op->volsync);
999 	_leave(" = 0 [done]");
1000 	return 0;
1001 }
1002 
1003 /*
1004  * YFS.Rename operation type
1005  */
1006 static const struct afs_call_type yfs_RXYFSRename = {
1007 	.name		= "FS.Rename",
1008 	.op		= yfs_FS_Rename,
1009 	.deliver	= yfs_deliver_fs_rename,
1010 	.destructor	= afs_flat_call_destructor,
1011 };
1012 
1013 /*
1014  * Rename a file or directory.
1015  */
yfs_fs_rename(struct afs_operation * op)1016 void yfs_fs_rename(struct afs_operation *op)
1017 {
1018 	struct afs_vnode_param *orig_dvp = &op->file[0];
1019 	struct afs_vnode_param *new_dvp = &op->file[1];
1020 	const struct qstr *orig_name = &op->dentry->d_name;
1021 	const struct qstr *new_name = &op->dentry_2->d_name;
1022 	struct afs_call *call;
1023 	__be32 *bp;
1024 
1025 	_enter("");
1026 
1027 	call = afs_alloc_flat_call(op->net, &yfs_RXYFSRename,
1028 				   sizeof(__be32) +
1029 				   sizeof(struct yfs_xdr_RPCFlags) +
1030 				   sizeof(struct yfs_xdr_YFSFid) +
1031 				   xdr_strlen(orig_name->len) +
1032 				   sizeof(struct yfs_xdr_YFSFid) +
1033 				   xdr_strlen(new_name->len),
1034 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
1035 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
1036 				   sizeof(struct yfs_xdr_YFSVolSync));
1037 	if (!call)
1038 		return afs_op_nomem(op);
1039 
1040 	/* marshall the parameters */
1041 	bp = call->request;
1042 	bp = xdr_encode_u32(bp, YFSRENAME);
1043 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
1044 	bp = xdr_encode_YFSFid(bp, &orig_dvp->fid);
1045 	bp = xdr_encode_name(bp, orig_name);
1046 	bp = xdr_encode_YFSFid(bp, &new_dvp->fid);
1047 	bp = xdr_encode_name(bp, new_name);
1048 	yfs_check_req(call, bp);
1049 
1050 	trace_afs_make_fs_call2(call, &orig_dvp->fid, orig_name, new_name);
1051 	afs_make_op_call(op, call, GFP_NOFS);
1052 }
1053 
1054 /*
1055  * YFS.StoreData64 operation type.
1056  */
1057 static const struct afs_call_type yfs_RXYFSStoreData64 = {
1058 	.name		= "YFS.StoreData64",
1059 	.op		= yfs_FS_StoreData64,
1060 	.deliver	= yfs_deliver_status_and_volsync,
1061 	.destructor	= afs_flat_call_destructor,
1062 };
1063 
1064 /*
1065  * Store a set of pages to a large file.
1066  */
yfs_fs_store_data(struct afs_operation * op)1067 void yfs_fs_store_data(struct afs_operation *op)
1068 {
1069 	struct afs_vnode_param *vp = &op->file[0];
1070 	struct afs_call *call;
1071 	__be32 *bp;
1072 
1073 	_enter(",%x,{%llx:%llu},,",
1074 	       key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1075 
1076 	_debug("size %llx, at %llx, i_size %llx",
1077 	       (unsigned long long)op->store.size,
1078 	       (unsigned long long)op->store.pos,
1079 	       (unsigned long long)op->store.i_size);
1080 
1081 	call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreData64,
1082 				   sizeof(__be32) +
1083 				   sizeof(__be32) +
1084 				   sizeof(struct yfs_xdr_YFSFid) +
1085 				   sizeof(struct yfs_xdr_YFSStoreStatus) +
1086 				   sizeof(struct yfs_xdr_u64) * 3,
1087 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
1088 				   sizeof(struct yfs_xdr_YFSVolSync));
1089 	if (!call)
1090 		return afs_op_nomem(op);
1091 
1092 	call->write_iter = op->store.write_iter;
1093 
1094 	/* marshall the parameters */
1095 	bp = call->request;
1096 	bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1097 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
1098 	bp = xdr_encode_YFSFid(bp, &vp->fid);
1099 	bp = xdr_encode_YFSStoreStatus(bp, NULL, &op->mtime);
1100 	bp = xdr_encode_u64(bp, op->store.pos);
1101 	bp = xdr_encode_u64(bp, op->store.size);
1102 	bp = xdr_encode_u64(bp, op->store.i_size);
1103 	yfs_check_req(call, bp);
1104 
1105 	trace_afs_make_fs_call(call, &vp->fid);
1106 	afs_make_op_call(op, call, GFP_NOFS);
1107 }
1108 
1109 /*
1110  * YFS.StoreStatus operation type
1111  */
1112 static const struct afs_call_type yfs_RXYFSStoreStatus = {
1113 	.name		= "YFS.StoreStatus",
1114 	.op		= yfs_FS_StoreStatus,
1115 	.deliver	= yfs_deliver_status_and_volsync,
1116 	.destructor	= afs_flat_call_destructor,
1117 };
1118 
1119 static const struct afs_call_type yfs_RXYFSStoreData64_as_Status = {
1120 	.name		= "YFS.StoreData64",
1121 	.op		= yfs_FS_StoreData64,
1122 	.deliver	= yfs_deliver_status_and_volsync,
1123 	.destructor	= afs_flat_call_destructor,
1124 };
1125 
1126 /*
1127  * Set the attributes on a file, using YFS.StoreData64 rather than
1128  * YFS.StoreStatus so as to alter the file size also.
1129  */
yfs_fs_setattr_size(struct afs_operation * op)1130 static void yfs_fs_setattr_size(struct afs_operation *op)
1131 {
1132 	struct afs_vnode_param *vp = &op->file[0];
1133 	struct afs_call *call;
1134 	struct iattr *attr = op->setattr.attr;
1135 	__be32 *bp;
1136 
1137 	_enter(",%x,{%llx:%llu},,",
1138 	       key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1139 
1140 	call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreData64_as_Status,
1141 				   sizeof(__be32) * 2 +
1142 				   sizeof(struct yfs_xdr_YFSFid) +
1143 				   sizeof(struct yfs_xdr_YFSStoreStatus) +
1144 				   sizeof(struct yfs_xdr_u64) * 3,
1145 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
1146 				   sizeof(struct yfs_xdr_YFSVolSync));
1147 	if (!call)
1148 		return afs_op_nomem(op);
1149 
1150 	/* marshall the parameters */
1151 	bp = call->request;
1152 	bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1153 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
1154 	bp = xdr_encode_YFSFid(bp, &vp->fid);
1155 	bp = xdr_encode_YFS_StoreStatus(bp, attr);
1156 	bp = xdr_encode_u64(bp, attr->ia_size);	/* position of start of write */
1157 	bp = xdr_encode_u64(bp, 0);		/* size of write */
1158 	bp = xdr_encode_u64(bp, attr->ia_size);	/* new file length */
1159 	yfs_check_req(call, bp);
1160 
1161 	trace_afs_make_fs_call(call, &vp->fid);
1162 	afs_make_op_call(op, call, GFP_NOFS);
1163 }
1164 
1165 /*
1166  * Set the attributes on a file, using YFS.StoreData64 if there's a change in
1167  * file size, and YFS.StoreStatus otherwise.
1168  */
yfs_fs_setattr(struct afs_operation * op)1169 void yfs_fs_setattr(struct afs_operation *op)
1170 {
1171 	struct afs_vnode_param *vp = &op->file[0];
1172 	struct afs_call *call;
1173 	struct iattr *attr = op->setattr.attr;
1174 	__be32 *bp;
1175 
1176 	if (attr->ia_valid & ATTR_SIZE)
1177 		return yfs_fs_setattr_size(op);
1178 
1179 	_enter(",%x,{%llx:%llu},,",
1180 	       key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1181 
1182 	call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreStatus,
1183 				   sizeof(__be32) * 2 +
1184 				   sizeof(struct yfs_xdr_YFSFid) +
1185 				   sizeof(struct yfs_xdr_YFSStoreStatus),
1186 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
1187 				   sizeof(struct yfs_xdr_YFSVolSync));
1188 	if (!call)
1189 		return afs_op_nomem(op);
1190 
1191 	/* marshall the parameters */
1192 	bp = call->request;
1193 	bp = xdr_encode_u32(bp, YFSSTORESTATUS);
1194 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
1195 	bp = xdr_encode_YFSFid(bp, &vp->fid);
1196 	bp = xdr_encode_YFS_StoreStatus(bp, attr);
1197 	yfs_check_req(call, bp);
1198 
1199 	trace_afs_make_fs_call(call, &vp->fid);
1200 	afs_make_op_call(op, call, GFP_NOFS);
1201 }
1202 
1203 /*
1204  * Deliver reply data to a YFS.GetVolumeStatus operation.
1205  */
yfs_deliver_fs_get_volume_status(struct afs_call * call)1206 static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
1207 {
1208 	struct afs_operation *op = call->op;
1209 	const __be32 *bp;
1210 	char *p;
1211 	u32 size;
1212 	int ret;
1213 
1214 	_enter("{%u}", call->unmarshall);
1215 
1216 	switch (call->unmarshall) {
1217 	case 0:
1218 		call->unmarshall++;
1219 		afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchVolumeStatus));
1220 		fallthrough;
1221 
1222 		/* extract the returned status record */
1223 	case 1:
1224 		_debug("extract status");
1225 		ret = afs_extract_data(call, true);
1226 		if (ret < 0)
1227 			return ret;
1228 
1229 		bp = call->buffer;
1230 		xdr_decode_YFSFetchVolumeStatus(&bp, &op->volstatus.vs);
1231 		call->unmarshall++;
1232 		afs_extract_to_tmp(call);
1233 		fallthrough;
1234 
1235 		/* extract the volume name length */
1236 	case 2:
1237 		ret = afs_extract_data(call, true);
1238 		if (ret < 0)
1239 			return ret;
1240 
1241 		call->count = ntohl(call->tmp);
1242 		_debug("volname length: %u", call->count);
1243 		if (call->count >= AFSNAMEMAX)
1244 			return afs_protocol_error(call, afs_eproto_volname_len);
1245 		size = (call->count + 3) & ~3; /* It's padded */
1246 		afs_extract_to_buf(call, size);
1247 		call->unmarshall++;
1248 		fallthrough;
1249 
1250 		/* extract the volume name */
1251 	case 3:
1252 		_debug("extract volname");
1253 		ret = afs_extract_data(call, true);
1254 		if (ret < 0)
1255 			return ret;
1256 
1257 		p = call->buffer;
1258 		p[call->count] = 0;
1259 		_debug("volname '%s'", p);
1260 		afs_extract_to_tmp(call);
1261 		call->unmarshall++;
1262 		fallthrough;
1263 
1264 		/* extract the offline message length */
1265 	case 4:
1266 		ret = afs_extract_data(call, true);
1267 		if (ret < 0)
1268 			return ret;
1269 
1270 		call->count = ntohl(call->tmp);
1271 		_debug("offline msg length: %u", call->count);
1272 		if (call->count >= AFSNAMEMAX)
1273 			return afs_protocol_error(call, afs_eproto_offline_msg_len);
1274 		size = (call->count + 3) & ~3; /* It's padded */
1275 		afs_extract_to_buf(call, size);
1276 		call->unmarshall++;
1277 		fallthrough;
1278 
1279 		/* extract the offline message */
1280 	case 5:
1281 		_debug("extract offline");
1282 		ret = afs_extract_data(call, true);
1283 		if (ret < 0)
1284 			return ret;
1285 
1286 		p = call->buffer;
1287 		p[call->count] = 0;
1288 		_debug("offline '%s'", p);
1289 
1290 		afs_extract_to_tmp(call);
1291 		call->unmarshall++;
1292 		fallthrough;
1293 
1294 		/* extract the message of the day length */
1295 	case 6:
1296 		ret = afs_extract_data(call, true);
1297 		if (ret < 0)
1298 			return ret;
1299 
1300 		call->count = ntohl(call->tmp);
1301 		_debug("motd length: %u", call->count);
1302 		if (call->count >= AFSNAMEMAX)
1303 			return afs_protocol_error(call, afs_eproto_motd_len);
1304 		size = (call->count + 3) & ~3; /* It's padded */
1305 		afs_extract_to_buf(call, size);
1306 		call->unmarshall++;
1307 		fallthrough;
1308 
1309 		/* extract the message of the day */
1310 	case 7:
1311 		_debug("extract motd");
1312 		ret = afs_extract_data(call, false);
1313 		if (ret < 0)
1314 			return ret;
1315 
1316 		p = call->buffer;
1317 		p[call->count] = 0;
1318 		_debug("motd '%s'", p);
1319 
1320 		call->unmarshall++;
1321 		fallthrough;
1322 
1323 	case 8:
1324 		break;
1325 	}
1326 
1327 	_leave(" = 0 [done]");
1328 	return 0;
1329 }
1330 
1331 /*
1332  * YFS.GetVolumeStatus operation type
1333  */
1334 static const struct afs_call_type yfs_RXYFSGetVolumeStatus = {
1335 	.name		= "YFS.GetVolumeStatus",
1336 	.op		= yfs_FS_GetVolumeStatus,
1337 	.deliver	= yfs_deliver_fs_get_volume_status,
1338 	.destructor	= afs_flat_call_destructor,
1339 };
1340 
1341 /*
1342  * fetch the status of a volume
1343  */
yfs_fs_get_volume_status(struct afs_operation * op)1344 void yfs_fs_get_volume_status(struct afs_operation *op)
1345 {
1346 	struct afs_vnode_param *vp = &op->file[0];
1347 	struct afs_call *call;
1348 	__be32 *bp;
1349 
1350 	_enter("");
1351 
1352 	call = afs_alloc_flat_call(op->net, &yfs_RXYFSGetVolumeStatus,
1353 				   sizeof(__be32) * 2 +
1354 				   sizeof(struct yfs_xdr_u64),
1355 				   max_t(size_t,
1356 					 sizeof(struct yfs_xdr_YFSFetchVolumeStatus) +
1357 					 sizeof(__be32),
1358 					 AFSOPAQUEMAX + 1));
1359 	if (!call)
1360 		return afs_op_nomem(op);
1361 
1362 	/* marshall the parameters */
1363 	bp = call->request;
1364 	bp = xdr_encode_u32(bp, YFSGETVOLUMESTATUS);
1365 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
1366 	bp = xdr_encode_u64(bp, vp->fid.vid);
1367 	yfs_check_req(call, bp);
1368 
1369 	trace_afs_make_fs_call(call, &vp->fid);
1370 	afs_make_op_call(op, call, GFP_NOFS);
1371 }
1372 
1373 /*
1374  * YFS.SetLock operation type
1375  */
1376 static const struct afs_call_type yfs_RXYFSSetLock = {
1377 	.name		= "YFS.SetLock",
1378 	.op		= yfs_FS_SetLock,
1379 	.deliver	= yfs_deliver_status_and_volsync,
1380 	.done		= afs_lock_op_done,
1381 	.destructor	= afs_flat_call_destructor,
1382 };
1383 
1384 /*
1385  * YFS.ExtendLock operation type
1386  */
1387 static const struct afs_call_type yfs_RXYFSExtendLock = {
1388 	.name		= "YFS.ExtendLock",
1389 	.op		= yfs_FS_ExtendLock,
1390 	.deliver	= yfs_deliver_status_and_volsync,
1391 	.done		= afs_lock_op_done,
1392 	.destructor	= afs_flat_call_destructor,
1393 };
1394 
1395 /*
1396  * YFS.ReleaseLock operation type
1397  */
1398 static const struct afs_call_type yfs_RXYFSReleaseLock = {
1399 	.name		= "YFS.ReleaseLock",
1400 	.op		= yfs_FS_ReleaseLock,
1401 	.deliver	= yfs_deliver_status_and_volsync,
1402 	.destructor	= afs_flat_call_destructor,
1403 };
1404 
1405 /*
1406  * Set a lock on a file
1407  */
yfs_fs_set_lock(struct afs_operation * op)1408 void yfs_fs_set_lock(struct afs_operation *op)
1409 {
1410 	struct afs_vnode_param *vp = &op->file[0];
1411 	struct afs_call *call;
1412 	__be32 *bp;
1413 
1414 	_enter("");
1415 
1416 	call = afs_alloc_flat_call(op->net, &yfs_RXYFSSetLock,
1417 				   sizeof(__be32) * 2 +
1418 				   sizeof(struct yfs_xdr_YFSFid) +
1419 				   sizeof(__be32),
1420 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
1421 				   sizeof(struct yfs_xdr_YFSVolSync));
1422 	if (!call)
1423 		return afs_op_nomem(op);
1424 
1425 	/* marshall the parameters */
1426 	bp = call->request;
1427 	bp = xdr_encode_u32(bp, YFSSETLOCK);
1428 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
1429 	bp = xdr_encode_YFSFid(bp, &vp->fid);
1430 	bp = xdr_encode_u32(bp, op->lock.type);
1431 	yfs_check_req(call, bp);
1432 
1433 	trace_afs_make_fs_calli(call, &vp->fid, op->lock.type);
1434 	afs_make_op_call(op, call, GFP_NOFS);
1435 }
1436 
1437 /*
1438  * extend a lock on a file
1439  */
yfs_fs_extend_lock(struct afs_operation * op)1440 void yfs_fs_extend_lock(struct afs_operation *op)
1441 {
1442 	struct afs_vnode_param *vp = &op->file[0];
1443 	struct afs_call *call;
1444 	__be32 *bp;
1445 
1446 	_enter("");
1447 
1448 	call = afs_alloc_flat_call(op->net, &yfs_RXYFSExtendLock,
1449 				   sizeof(__be32) * 2 +
1450 				   sizeof(struct yfs_xdr_YFSFid),
1451 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
1452 				   sizeof(struct yfs_xdr_YFSVolSync));
1453 	if (!call)
1454 		return afs_op_nomem(op);
1455 
1456 	/* marshall the parameters */
1457 	bp = call->request;
1458 	bp = xdr_encode_u32(bp, YFSEXTENDLOCK);
1459 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
1460 	bp = xdr_encode_YFSFid(bp, &vp->fid);
1461 	yfs_check_req(call, bp);
1462 
1463 	trace_afs_make_fs_call(call, &vp->fid);
1464 	afs_make_op_call(op, call, GFP_NOFS);
1465 }
1466 
1467 /*
1468  * release a lock on a file
1469  */
yfs_fs_release_lock(struct afs_operation * op)1470 void yfs_fs_release_lock(struct afs_operation *op)
1471 {
1472 	struct afs_vnode_param *vp = &op->file[0];
1473 	struct afs_call *call;
1474 	__be32 *bp;
1475 
1476 	_enter("");
1477 
1478 	call = afs_alloc_flat_call(op->net, &yfs_RXYFSReleaseLock,
1479 				   sizeof(__be32) * 2 +
1480 				   sizeof(struct yfs_xdr_YFSFid),
1481 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
1482 				   sizeof(struct yfs_xdr_YFSVolSync));
1483 	if (!call)
1484 		return afs_op_nomem(op);
1485 
1486 	/* marshall the parameters */
1487 	bp = call->request;
1488 	bp = xdr_encode_u32(bp, YFSRELEASELOCK);
1489 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
1490 	bp = xdr_encode_YFSFid(bp, &vp->fid);
1491 	yfs_check_req(call, bp);
1492 
1493 	trace_afs_make_fs_call(call, &vp->fid);
1494 	afs_make_op_call(op, call, GFP_NOFS);
1495 }
1496 
1497 /*
1498  * Deliver a reply to YFS.FetchStatus
1499  */
yfs_deliver_fs_fetch_status(struct afs_call * call)1500 static int yfs_deliver_fs_fetch_status(struct afs_call *call)
1501 {
1502 	struct afs_operation *op = call->op;
1503 	struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
1504 	const __be32 *bp;
1505 	int ret;
1506 
1507 	ret = afs_transfer_reply(call);
1508 	if (ret < 0)
1509 		return ret;
1510 
1511 	/* unmarshall the reply once we've received all of it */
1512 	bp = call->buffer;
1513 	xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
1514 	xdr_decode_YFSCallBack(&bp, call, &vp->scb);
1515 	xdr_decode_YFSVolSync(&bp, &op->volsync);
1516 
1517 	_leave(" = 0 [done]");
1518 	return 0;
1519 }
1520 
1521 /*
1522  * YFS.FetchStatus operation type
1523  */
1524 static const struct afs_call_type yfs_RXYFSFetchStatus = {
1525 	.name		= "YFS.FetchStatus",
1526 	.op		= yfs_FS_FetchStatus,
1527 	.deliver	= yfs_deliver_fs_fetch_status,
1528 	.destructor	= afs_flat_call_destructor,
1529 };
1530 
1531 /*
1532  * Fetch the status information for a fid without needing a vnode handle.
1533  */
yfs_fs_fetch_status(struct afs_operation * op)1534 void yfs_fs_fetch_status(struct afs_operation *op)
1535 {
1536 	struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
1537 	struct afs_call *call;
1538 	__be32 *bp;
1539 
1540 	_enter(",%x,{%llx:%llu},,",
1541 	       key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1542 
1543 	call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchStatus,
1544 				   sizeof(__be32) * 2 +
1545 				   sizeof(struct yfs_xdr_YFSFid),
1546 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
1547 				   sizeof(struct yfs_xdr_YFSCallBack) +
1548 				   sizeof(struct yfs_xdr_YFSVolSync));
1549 	if (!call)
1550 		return afs_op_nomem(op);
1551 
1552 	/* marshall the parameters */
1553 	bp = call->request;
1554 	bp = xdr_encode_u32(bp, YFSFETCHSTATUS);
1555 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
1556 	bp = xdr_encode_YFSFid(bp, &vp->fid);
1557 	yfs_check_req(call, bp);
1558 
1559 	trace_afs_make_fs_call(call, &vp->fid);
1560 	afs_make_op_call(op, call, GFP_NOFS);
1561 }
1562 
1563 /*
1564  * Deliver reply data to an YFS.InlineBulkStatus call
1565  */
yfs_deliver_fs_inline_bulk_status(struct afs_call * call)1566 static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
1567 {
1568 	struct afs_operation *op = call->op;
1569 	struct afs_status_cb *scb;
1570 	const __be32 *bp;
1571 	u32 tmp;
1572 	int ret;
1573 
1574 	_enter("{%u}", call->unmarshall);
1575 
1576 	switch (call->unmarshall) {
1577 	case 0:
1578 		afs_extract_to_tmp(call);
1579 		call->unmarshall++;
1580 		fallthrough;
1581 
1582 		/* Extract the file status count and array in two steps */
1583 	case 1:
1584 		_debug("extract status count");
1585 		ret = afs_extract_data(call, true);
1586 		if (ret < 0)
1587 			return ret;
1588 
1589 		tmp = ntohl(call->tmp);
1590 		_debug("status count: %u/%u", tmp, op->nr_files);
1591 		if (tmp != op->nr_files)
1592 			return afs_protocol_error(call, afs_eproto_ibulkst_count);
1593 
1594 		call->count = 0;
1595 		call->unmarshall++;
1596 	more_counts:
1597 		afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchStatus));
1598 		fallthrough;
1599 
1600 	case 2:
1601 		_debug("extract status array %u", call->count);
1602 		ret = afs_extract_data(call, true);
1603 		if (ret < 0)
1604 			return ret;
1605 
1606 		switch (call->count) {
1607 		case 0:
1608 			scb = &op->file[0].scb;
1609 			break;
1610 		case 1:
1611 			scb = &op->file[1].scb;
1612 			break;
1613 		default:
1614 			scb = &op->more_files[call->count - 2].scb;
1615 			break;
1616 		}
1617 
1618 		bp = call->buffer;
1619 		xdr_decode_YFSFetchStatus(&bp, call, scb);
1620 
1621 		call->count++;
1622 		if (call->count < op->nr_files)
1623 			goto more_counts;
1624 
1625 		call->count = 0;
1626 		call->unmarshall++;
1627 		afs_extract_to_tmp(call);
1628 		fallthrough;
1629 
1630 		/* Extract the callback count and array in two steps */
1631 	case 3:
1632 		_debug("extract CB count");
1633 		ret = afs_extract_data(call, true);
1634 		if (ret < 0)
1635 			return ret;
1636 
1637 		tmp = ntohl(call->tmp);
1638 		_debug("CB count: %u", tmp);
1639 		if (tmp != op->nr_files)
1640 			return afs_protocol_error(call, afs_eproto_ibulkst_cb_count);
1641 		call->count = 0;
1642 		call->unmarshall++;
1643 	more_cbs:
1644 		afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSCallBack));
1645 		fallthrough;
1646 
1647 	case 4:
1648 		_debug("extract CB array");
1649 		ret = afs_extract_data(call, true);
1650 		if (ret < 0)
1651 			return ret;
1652 
1653 		_debug("unmarshall CB array");
1654 		switch (call->count) {
1655 		case 0:
1656 			scb = &op->file[0].scb;
1657 			break;
1658 		case 1:
1659 			scb = &op->file[1].scb;
1660 			break;
1661 		default:
1662 			scb = &op->more_files[call->count - 2].scb;
1663 			break;
1664 		}
1665 
1666 		bp = call->buffer;
1667 		xdr_decode_YFSCallBack(&bp, call, scb);
1668 		call->count++;
1669 		if (call->count < op->nr_files)
1670 			goto more_cbs;
1671 
1672 		afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSVolSync));
1673 		call->unmarshall++;
1674 		fallthrough;
1675 
1676 	case 5:
1677 		ret = afs_extract_data(call, false);
1678 		if (ret < 0)
1679 			return ret;
1680 
1681 		bp = call->buffer;
1682 		xdr_decode_YFSVolSync(&bp, &op->volsync);
1683 
1684 		call->unmarshall++;
1685 		fallthrough;
1686 
1687 	case 6:
1688 		break;
1689 	}
1690 
1691 	_leave(" = 0 [done]");
1692 	return 0;
1693 }
1694 
1695 /*
1696  * FS.InlineBulkStatus operation type
1697  */
1698 static const struct afs_call_type yfs_RXYFSInlineBulkStatus = {
1699 	.name		= "YFS.InlineBulkStatus",
1700 	.op		= yfs_FS_InlineBulkStatus,
1701 	.deliver	= yfs_deliver_fs_inline_bulk_status,
1702 	.destructor	= afs_flat_call_destructor,
1703 };
1704 
1705 /*
1706  * Fetch the status information for up to 1024 files
1707  */
yfs_fs_inline_bulk_status(struct afs_operation * op)1708 void yfs_fs_inline_bulk_status(struct afs_operation *op)
1709 {
1710 	struct afs_vnode_param *dvp = &op->file[0];
1711 	struct afs_vnode_param *vp = &op->file[1];
1712 	struct afs_call *call;
1713 	__be32 *bp;
1714 	int i;
1715 
1716 	_enter(",%x,{%llx:%llu},%u",
1717 	       key_serial(op->key), vp->fid.vid, vp->fid.vnode, op->nr_files);
1718 
1719 	call = afs_alloc_flat_call(op->net, &yfs_RXYFSInlineBulkStatus,
1720 				   sizeof(__be32) +
1721 				   sizeof(__be32) +
1722 				   sizeof(__be32) +
1723 				   sizeof(struct yfs_xdr_YFSFid) * op->nr_files,
1724 				   sizeof(struct yfs_xdr_YFSFetchStatus));
1725 	if (!call)
1726 		return afs_op_nomem(op);
1727 
1728 	/* marshall the parameters */
1729 	bp = call->request;
1730 	bp = xdr_encode_u32(bp, YFSINLINEBULKSTATUS);
1731 	bp = xdr_encode_u32(bp, 0); /* RPCFlags */
1732 	bp = xdr_encode_u32(bp, op->nr_files);
1733 	bp = xdr_encode_YFSFid(bp, &dvp->fid);
1734 	bp = xdr_encode_YFSFid(bp, &vp->fid);
1735 	for (i = 0; i < op->nr_files - 2; i++)
1736 		bp = xdr_encode_YFSFid(bp, &op->more_files[i].fid);
1737 	yfs_check_req(call, bp);
1738 
1739 	trace_afs_make_fs_call(call, &vp->fid);
1740 	afs_make_op_call(op, call, GFP_NOFS);
1741 }
1742 
1743 /*
1744  * Deliver reply data to an YFS.FetchOpaqueACL.
1745  */
yfs_deliver_fs_fetch_opaque_acl(struct afs_call * call)1746 static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
1747 {
1748 	struct afs_operation *op = call->op;
1749 	struct afs_vnode_param *vp = &op->file[0];
1750 	struct yfs_acl *yacl = op->yacl;
1751 	struct afs_acl *acl;
1752 	const __be32 *bp;
1753 	unsigned int size;
1754 	int ret;
1755 
1756 	_enter("{%u}", call->unmarshall);
1757 
1758 	switch (call->unmarshall) {
1759 	case 0:
1760 		afs_extract_to_tmp(call);
1761 		call->unmarshall++;
1762 		fallthrough;
1763 
1764 		/* Extract the file ACL length */
1765 	case 1:
1766 		ret = afs_extract_data(call, true);
1767 		if (ret < 0)
1768 			return ret;
1769 
1770 		size = call->count2 = ntohl(call->tmp);
1771 		size = round_up(size, 4);
1772 
1773 		if (yacl->flags & YFS_ACL_WANT_ACL) {
1774 			acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
1775 			if (!acl)
1776 				return -ENOMEM;
1777 			yacl->acl = acl;
1778 			acl->size = call->count2;
1779 			afs_extract_begin(call, acl->data, size);
1780 		} else {
1781 			afs_extract_discard(call, size);
1782 		}
1783 		call->unmarshall++;
1784 		fallthrough;
1785 
1786 		/* Extract the file ACL */
1787 	case 2:
1788 		ret = afs_extract_data(call, true);
1789 		if (ret < 0)
1790 			return ret;
1791 
1792 		afs_extract_to_tmp(call);
1793 		call->unmarshall++;
1794 		fallthrough;
1795 
1796 		/* Extract the volume ACL length */
1797 	case 3:
1798 		ret = afs_extract_data(call, true);
1799 		if (ret < 0)
1800 			return ret;
1801 
1802 		size = call->count2 = ntohl(call->tmp);
1803 		size = round_up(size, 4);
1804 
1805 		if (yacl->flags & YFS_ACL_WANT_VOL_ACL) {
1806 			acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
1807 			if (!acl)
1808 				return -ENOMEM;
1809 			yacl->vol_acl = acl;
1810 			acl->size = call->count2;
1811 			afs_extract_begin(call, acl->data, size);
1812 		} else {
1813 			afs_extract_discard(call, size);
1814 		}
1815 		call->unmarshall++;
1816 		fallthrough;
1817 
1818 		/* Extract the volume ACL */
1819 	case 4:
1820 		ret = afs_extract_data(call, true);
1821 		if (ret < 0)
1822 			return ret;
1823 
1824 		afs_extract_to_buf(call,
1825 				   sizeof(__be32) * 2 +
1826 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
1827 				   sizeof(struct yfs_xdr_YFSVolSync));
1828 		call->unmarshall++;
1829 		fallthrough;
1830 
1831 		/* extract the metadata */
1832 	case 5:
1833 		ret = afs_extract_data(call, false);
1834 		if (ret < 0)
1835 			return ret;
1836 
1837 		bp = call->buffer;
1838 		yacl->inherit_flag = ntohl(*bp++);
1839 		yacl->num_cleaned = ntohl(*bp++);
1840 		xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
1841 		xdr_decode_YFSVolSync(&bp, &op->volsync);
1842 
1843 		call->unmarshall++;
1844 		fallthrough;
1845 
1846 	case 6:
1847 		break;
1848 	}
1849 
1850 	_leave(" = 0 [done]");
1851 	return 0;
1852 }
1853 
yfs_free_opaque_acl(struct yfs_acl * yacl)1854 void yfs_free_opaque_acl(struct yfs_acl *yacl)
1855 {
1856 	if (yacl) {
1857 		kfree(yacl->acl);
1858 		kfree(yacl->vol_acl);
1859 		kfree(yacl);
1860 	}
1861 }
1862 
1863 /*
1864  * YFS.FetchOpaqueACL operation type
1865  */
1866 static const struct afs_call_type yfs_RXYFSFetchOpaqueACL = {
1867 	.name		= "YFS.FetchOpaqueACL",
1868 	.op		= yfs_FS_FetchOpaqueACL,
1869 	.deliver	= yfs_deliver_fs_fetch_opaque_acl,
1870 	.destructor	= afs_flat_call_destructor,
1871 };
1872 
1873 /*
1874  * Fetch the YFS advanced ACLs for a file.
1875  */
yfs_fs_fetch_opaque_acl(struct afs_operation * op)1876 void yfs_fs_fetch_opaque_acl(struct afs_operation *op)
1877 {
1878 	struct afs_vnode_param *vp = &op->file[0];
1879 	struct afs_call *call;
1880 	__be32 *bp;
1881 
1882 	_enter(",%x,{%llx:%llu},,",
1883 	       key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1884 
1885 	call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchOpaqueACL,
1886 				   sizeof(__be32) * 2 +
1887 				   sizeof(struct yfs_xdr_YFSFid),
1888 				   sizeof(__be32) * 2 +
1889 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
1890 				   sizeof(struct yfs_xdr_YFSVolSync));
1891 	if (!call)
1892 		return afs_op_nomem(op);
1893 
1894 	/* marshall the parameters */
1895 	bp = call->request;
1896 	bp = xdr_encode_u32(bp, YFSFETCHOPAQUEACL);
1897 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
1898 	bp = xdr_encode_YFSFid(bp, &vp->fid);
1899 	yfs_check_req(call, bp);
1900 
1901 	trace_afs_make_fs_call(call, &vp->fid);
1902 	afs_make_op_call(op, call, GFP_KERNEL);
1903 }
1904 
1905 /*
1906  * YFS.StoreOpaqueACL2 operation type
1907  */
1908 static const struct afs_call_type yfs_RXYFSStoreOpaqueACL2 = {
1909 	.name		= "YFS.StoreOpaqueACL2",
1910 	.op		= yfs_FS_StoreOpaqueACL2,
1911 	.deliver	= yfs_deliver_status_and_volsync,
1912 	.destructor	= afs_flat_call_destructor,
1913 };
1914 
1915 /*
1916  * Fetch the YFS ACL for a file.
1917  */
yfs_fs_store_opaque_acl2(struct afs_operation * op)1918 void yfs_fs_store_opaque_acl2(struct afs_operation *op)
1919 {
1920 	struct afs_vnode_param *vp = &op->file[0];
1921 	struct afs_call *call;
1922 	struct afs_acl *acl = op->acl;
1923 	size_t size;
1924 	__be32 *bp;
1925 
1926 	_enter(",%x,{%llx:%llu},,",
1927 	       key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1928 
1929 	size = round_up(acl->size, 4);
1930 	call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreOpaqueACL2,
1931 				   sizeof(__be32) * 2 +
1932 				   sizeof(struct yfs_xdr_YFSFid) +
1933 				   sizeof(__be32) + size,
1934 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
1935 				   sizeof(struct yfs_xdr_YFSVolSync));
1936 	if (!call)
1937 		return afs_op_nomem(op);
1938 
1939 	/* marshall the parameters */
1940 	bp = call->request;
1941 	bp = xdr_encode_u32(bp, YFSSTOREOPAQUEACL2);
1942 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
1943 	bp = xdr_encode_YFSFid(bp, &vp->fid);
1944 	bp = xdr_encode_u32(bp, acl->size);
1945 	memcpy(bp, acl->data, acl->size);
1946 	if (acl->size != size)
1947 		memset((void *)bp + acl->size, 0, size - acl->size);
1948 	bp += size / sizeof(__be32);
1949 	yfs_check_req(call, bp);
1950 
1951 	trace_afs_make_fs_call(call, &vp->fid);
1952 	afs_make_op_call(op, call, GFP_KERNEL);
1953 }
1954