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