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1// SPDX-License-Identifier: GPL-2.0-or-later
2/* AFS File Server client stubs
3 *
4 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8#include <linux/init.h>
9#include <linux/slab.h>
10#include <linux/sched.h>
11#include <linux/circ_buf.h>
12#include <linux/iversion.h>
13#include <linux/netfs.h>
14#include "internal.h"
15#include "afs_fs.h"
16#include "xdr_fs.h"
17
18/*
19 * decode an AFSFid block
20 */
21static void xdr_decode_AFSFid(const __be32 **_bp, struct afs_fid *fid)
22{
23 const __be32 *bp = *_bp;
24
25 fid->vid = ntohl(*bp++);
26 fid->vnode = ntohl(*bp++);
27 fid->unique = ntohl(*bp++);
28 *_bp = bp;
29}
30
31/*
32 * Dump a bad file status record.
33 */
34static void xdr_dump_bad(const __be32 *bp)
35{
36 __be32 x[4];
37 int i;
38
39 pr_notice("AFS XDR: Bad status record\n");
40 for (i = 0; i < 5 * 4 * 4; i += 16) {
41 memcpy(x, bp, 16);
42 bp += 4;
43 pr_notice("%03x: %08x %08x %08x %08x\n",
44 i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
45 }
46
47 memcpy(x, bp, 4);
48 pr_notice("0x50: %08x\n", ntohl(x[0]));
49}
50
51/*
52 * decode an AFSFetchStatus block
53 */
54static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
55 struct afs_call *call,
56 struct afs_status_cb *scb)
57{
58 const struct afs_xdr_AFSFetchStatus *xdr = (const void *)*_bp;
59 struct afs_file_status *status = &scb->status;
60 bool inline_error = (call->operation_ID == afs_FS_InlineBulkStatus);
61 u64 data_version, size;
62 u32 type, abort_code;
63
64 abort_code = ntohl(xdr->abort_code);
65
66 if (xdr->if_version != htonl(AFS_FSTATUS_VERSION)) {
67 if (xdr->if_version == htonl(0) &&
68 abort_code != 0 &&
69 inline_error) {
70 /* The OpenAFS fileserver has a bug in FS.InlineBulkStatus
71 * whereby it doesn't set the interface version in the error
72 * case.
73 */
74 status->abort_code = abort_code;
75 scb->have_error = true;
76 goto advance;
77 }
78
79 pr_warn("Unknown AFSFetchStatus version %u\n", ntohl(xdr->if_version));
80 goto bad;
81 }
82
83 if (abort_code != 0 && inline_error) {
84 status->abort_code = abort_code;
85 scb->have_error = true;
86 goto advance;
87 }
88
89 type = ntohl(xdr->type);
90 switch (type) {
91 case AFS_FTYPE_FILE:
92 case AFS_FTYPE_DIR:
93 case AFS_FTYPE_SYMLINK:
94 status->type = type;
95 break;
96 default:
97 goto bad;
98 }
99
100 status->nlink = ntohl(xdr->nlink);
101 status->author = ntohl(xdr->author);
102 status->owner = ntohl(xdr->owner);
103 status->caller_access = ntohl(xdr->caller_access); /* Ticket dependent */
104 status->anon_access = ntohl(xdr->anon_access);
105 status->mode = ntohl(xdr->mode) & S_IALLUGO;
106 status->group = ntohl(xdr->group);
107 status->lock_count = ntohl(xdr->lock_count);
108
109 status->mtime_client.tv_sec = ntohl(xdr->mtime_client);
110 status->mtime_client.tv_nsec = 0;
111 status->mtime_server.tv_sec = ntohl(xdr->mtime_server);
112 status->mtime_server.tv_nsec = 0;
113
114 size = (u64)ntohl(xdr->size_lo);
115 size |= (u64)ntohl(xdr->size_hi) << 32;
116 status->size = size;
117
118 data_version = (u64)ntohl(xdr->data_version_lo);
119 data_version |= (u64)ntohl(xdr->data_version_hi) << 32;
120 status->data_version = data_version;
121 scb->have_status = true;
122advance:
123 *_bp = (const void *)*_bp + sizeof(*xdr);
124 return;
125
126bad:
127 xdr_dump_bad(*_bp);
128 afs_protocol_error(call, afs_eproto_bad_status);
129 goto advance;
130}
131
132static time64_t xdr_decode_expiry(struct afs_call *call, u32 expiry)
133{
134 return ktime_divns(call->issue_time, NSEC_PER_SEC) + expiry;
135}
136
137static void xdr_decode_AFSCallBack(const __be32 **_bp,
138 struct afs_call *call,
139 struct afs_status_cb *scb)
140{
141 struct afs_callback *cb = &scb->callback;
142 const __be32 *bp = *_bp;
143
144 bp++; /* version */
145 cb->expires_at = xdr_decode_expiry(call, ntohl(*bp++));
146 bp++; /* type */
147 scb->have_cb = true;
148 *_bp = bp;
149}
150
151/*
152 * decode an AFSVolSync block
153 */
154static void xdr_decode_AFSVolSync(const __be32 **_bp,
155 struct afs_volsync *volsync)
156{
157 const __be32 *bp = *_bp;
158 u32 creation;
159
160 creation = ntohl(*bp++);
161 bp++; /* spare2 */
162 bp++; /* spare3 */
163 bp++; /* spare4 */
164 bp++; /* spare5 */
165 bp++; /* spare6 */
166 *_bp = bp;
167
168 if (volsync)
169 volsync->creation = creation;
170}
171
172/*
173 * encode the requested attributes into an AFSStoreStatus block
174 */
175static void xdr_encode_AFS_StoreStatus(__be32 **_bp, struct iattr *attr)
176{
177 __be32 *bp = *_bp;
178 u32 mask = 0, mtime = 0, owner = 0, group = 0, mode = 0;
179
180 mask = 0;
181 if (attr->ia_valid & ATTR_MTIME) {
182 mask |= AFS_SET_MTIME;
183 mtime = attr->ia_mtime.tv_sec;
184 }
185
186 if (attr->ia_valid & ATTR_UID) {
187 mask |= AFS_SET_OWNER;
188 owner = from_kuid(&init_user_ns, attr->ia_uid);
189 }
190
191 if (attr->ia_valid & ATTR_GID) {
192 mask |= AFS_SET_GROUP;
193 group = from_kgid(&init_user_ns, attr->ia_gid);
194 }
195
196 if (attr->ia_valid & ATTR_MODE) {
197 mask |= AFS_SET_MODE;
198 mode = attr->ia_mode & S_IALLUGO;
199 }
200
201 *bp++ = htonl(mask);
202 *bp++ = htonl(mtime);
203 *bp++ = htonl(owner);
204 *bp++ = htonl(group);
205 *bp++ = htonl(mode);
206 *bp++ = 0; /* segment size */
207 *_bp = bp;
208}
209
210/*
211 * decode an AFSFetchVolumeStatus block
212 */
213static void xdr_decode_AFSFetchVolumeStatus(const __be32 **_bp,
214 struct afs_volume_status *vs)
215{
216 const __be32 *bp = *_bp;
217
218 vs->vid = ntohl(*bp++);
219 vs->parent_id = ntohl(*bp++);
220 vs->online = ntohl(*bp++);
221 vs->in_service = ntohl(*bp++);
222 vs->blessed = ntohl(*bp++);
223 vs->needs_salvage = ntohl(*bp++);
224 vs->type = ntohl(*bp++);
225 vs->min_quota = ntohl(*bp++);
226 vs->max_quota = ntohl(*bp++);
227 vs->blocks_in_use = ntohl(*bp++);
228 vs->part_blocks_avail = ntohl(*bp++);
229 vs->part_max_blocks = ntohl(*bp++);
230 vs->vol_copy_date = 0;
231 vs->vol_backup_date = 0;
232 *_bp = bp;
233}
234
235/*
236 * deliver reply data to an FS.FetchStatus
237 */
238static int afs_deliver_fs_fetch_status(struct afs_call *call)
239{
240 struct afs_operation *op = call->op;
241 struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
242 const __be32 *bp;
243 int ret;
244
245 ret = afs_transfer_reply(call);
246 if (ret < 0)
247 return ret;
248
249 /* unmarshall the reply once we've received all of it */
250 bp = call->buffer;
251 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
252 xdr_decode_AFSCallBack(&bp, call, &vp->scb);
253 xdr_decode_AFSVolSync(&bp, &op->volsync);
254
255 _leave(" = 0 [done]");
256 return 0;
257}
258
259/*
260 * FS.FetchStatus operation type
261 */
262static const struct afs_call_type afs_RXFSFetchStatus = {
263 .name = "FS.FetchStatus",
264 .op = afs_FS_FetchStatus,
265 .deliver = afs_deliver_fs_fetch_status,
266 .destructor = afs_flat_call_destructor,
267};
268
269/*
270 * fetch the status information for a file
271 */
272void afs_fs_fetch_status(struct afs_operation *op)
273{
274 struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
275 struct afs_call *call;
276 __be32 *bp;
277
278 _enter(",%x,{%llx:%llu},,",
279 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
280
281 call = afs_alloc_flat_call(op->net, &afs_RXFSFetchStatus,
282 16, (21 + 3 + 6) * 4);
283 if (!call)
284 return afs_op_nomem(op);
285
286 /* marshall the parameters */
287 bp = call->request;
288 bp[0] = htonl(FSFETCHSTATUS);
289 bp[1] = htonl(vp->fid.vid);
290 bp[2] = htonl(vp->fid.vnode);
291 bp[3] = htonl(vp->fid.unique);
292
293 call->fid = vp->fid;
294 trace_afs_make_fs_call(call, &vp->fid);
295 afs_make_op_call(op, call, GFP_NOFS);
296}
297
298/*
299 * deliver reply data to an FS.FetchData
300 */
301static int afs_deliver_fs_fetch_data(struct afs_call *call)
302{
303 struct afs_operation *op = call->op;
304 struct afs_vnode_param *vp = &op->file[0];
305 struct afs_read *req = op->fetch.req;
306 const __be32 *bp;
307 size_t count_before;
308 int ret;
309
310 _enter("{%u,%zu,%zu/%llu}",
311 call->unmarshall, call->iov_len, iov_iter_count(call->iter),
312 req->actual_len);
313
314 switch (call->unmarshall) {
315 case 0:
316 req->actual_len = 0;
317 call->unmarshall++;
318 if (call->operation_ID == FSFETCHDATA64) {
319 afs_extract_to_tmp64(call);
320 } else {
321 call->tmp_u = htonl(0);
322 afs_extract_to_tmp(call);
323 }
324 fallthrough;
325
326 /* Extract the returned data length into
327 * ->actual_len. This may indicate more or less data than was
328 * requested will be returned.
329 */
330 case 1:
331 _debug("extract data length");
332 ret = afs_extract_data(call, true);
333 if (ret < 0)
334 return ret;
335
336 req->actual_len = be64_to_cpu(call->tmp64);
337 _debug("DATA length: %llu", req->actual_len);
338
339 if (req->actual_len == 0)
340 goto no_more_data;
341
342 call->iter = req->iter;
343 call->iov_len = min(req->actual_len, req->len);
344 call->unmarshall++;
345 fallthrough;
346
347 /* extract the returned data */
348 case 2:
349 count_before = call->iov_len;
350 _debug("extract data %zu/%llu", count_before, req->actual_len);
351
352 ret = afs_extract_data(call, true);
353 if (req->subreq) {
354 req->subreq->transferred += count_before - call->iov_len;
355 netfs_read_subreq_progress(req->subreq, false);
356 }
357 if (ret < 0)
358 return ret;
359
360 call->iter = &call->def_iter;
361 if (req->actual_len <= req->len)
362 goto no_more_data;
363
364 /* Discard any excess data the server gave us */
365 afs_extract_discard(call, req->actual_len - req->len);
366 call->unmarshall = 3;
367 fallthrough;
368
369 case 3:
370 _debug("extract discard %zu/%llu",
371 iov_iter_count(call->iter), req->actual_len - req->len);
372
373 ret = afs_extract_data(call, true);
374 if (ret < 0)
375 return ret;
376
377 no_more_data:
378 call->unmarshall = 4;
379 afs_extract_to_buf(call, (21 + 3 + 6) * 4);
380 fallthrough;
381
382 /* extract the metadata */
383 case 4:
384 ret = afs_extract_data(call, false);
385 if (ret < 0)
386 return ret;
387
388 bp = call->buffer;
389 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
390 xdr_decode_AFSCallBack(&bp, call, &vp->scb);
391 xdr_decode_AFSVolSync(&bp, &op->volsync);
392
393 req->data_version = vp->scb.status.data_version;
394 req->file_size = vp->scb.status.size;
395
396 call->unmarshall++;
397 fallthrough;
398
399 case 5:
400 break;
401 }
402
403 _leave(" = 0 [done]");
404 return 0;
405}
406
407/*
408 * FS.FetchData operation type
409 */
410static const struct afs_call_type afs_RXFSFetchData = {
411 .name = "FS.FetchData",
412 .op = afs_FS_FetchData,
413 .deliver = afs_deliver_fs_fetch_data,
414 .destructor = afs_flat_call_destructor,
415};
416
417static const struct afs_call_type afs_RXFSFetchData64 = {
418 .name = "FS.FetchData64",
419 .op = afs_FS_FetchData64,
420 .deliver = afs_deliver_fs_fetch_data,
421 .destructor = afs_flat_call_destructor,
422};
423
424/*
425 * fetch data from a very large file
426 */
427static void afs_fs_fetch_data64(struct afs_operation *op)
428{
429 struct afs_vnode_param *vp = &op->file[0];
430 struct afs_read *req = op->fetch.req;
431 struct afs_call *call;
432 __be32 *bp;
433
434 _enter("");
435
436 call = afs_alloc_flat_call(op->net, &afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4);
437 if (!call)
438 return afs_op_nomem(op);
439
440 /* marshall the parameters */
441 bp = call->request;
442 bp[0] = htonl(FSFETCHDATA64);
443 bp[1] = htonl(vp->fid.vid);
444 bp[2] = htonl(vp->fid.vnode);
445 bp[3] = htonl(vp->fid.unique);
446 bp[4] = htonl(upper_32_bits(req->pos));
447 bp[5] = htonl(lower_32_bits(req->pos));
448 bp[6] = 0;
449 bp[7] = htonl(lower_32_bits(req->len));
450
451 call->fid = vp->fid;
452 trace_afs_make_fs_call(call, &vp->fid);
453 afs_make_op_call(op, call, GFP_NOFS);
454}
455
456/*
457 * fetch data from a file
458 */
459void afs_fs_fetch_data(struct afs_operation *op)
460{
461 struct afs_vnode_param *vp = &op->file[0];
462 struct afs_call *call;
463 struct afs_read *req = op->fetch.req;
464 __be32 *bp;
465
466 if (test_bit(AFS_SERVER_FL_HAS_FS64, &op->server->flags))
467 return afs_fs_fetch_data64(op);
468
469 _enter("");
470
471 call = afs_alloc_flat_call(op->net, &afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
472 if (!call)
473 return afs_op_nomem(op);
474
475 req->call_debug_id = call->debug_id;
476
477 /* marshall the parameters */
478 bp = call->request;
479 bp[0] = htonl(FSFETCHDATA);
480 bp[1] = htonl(vp->fid.vid);
481 bp[2] = htonl(vp->fid.vnode);
482 bp[3] = htonl(vp->fid.unique);
483 bp[4] = htonl(lower_32_bits(req->pos));
484 bp[5] = htonl(lower_32_bits(req->len));
485
486 call->fid = vp->fid;
487 trace_afs_make_fs_call(call, &vp->fid);
488 afs_make_op_call(op, call, GFP_NOFS);
489}
490
491/*
492 * deliver reply data to an FS.CreateFile or an FS.MakeDir
493 */
494static int afs_deliver_fs_create_vnode(struct afs_call *call)
495{
496 struct afs_operation *op = call->op;
497 struct afs_vnode_param *dvp = &op->file[0];
498 struct afs_vnode_param *vp = &op->file[1];
499 const __be32 *bp;
500 int ret;
501
502 ret = afs_transfer_reply(call);
503 if (ret < 0)
504 return ret;
505
506 /* unmarshall the reply once we've received all of it */
507 bp = call->buffer;
508 xdr_decode_AFSFid(&bp, &op->file[1].fid);
509 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
510 xdr_decode_AFSFetchStatus(&bp, call, &dvp->scb);
511 xdr_decode_AFSCallBack(&bp, call, &vp->scb);
512 xdr_decode_AFSVolSync(&bp, &op->volsync);
513
514 _leave(" = 0 [done]");
515 return 0;
516}
517
518/*
519 * FS.CreateFile and FS.MakeDir operation type
520 */
521static const struct afs_call_type afs_RXFSCreateFile = {
522 .name = "FS.CreateFile",
523 .op = afs_FS_CreateFile,
524 .deliver = afs_deliver_fs_create_vnode,
525 .destructor = afs_flat_call_destructor,
526};
527
528/*
529 * Create a file.
530 */
531void afs_fs_create_file(struct afs_operation *op)
532{
533 const struct qstr *name = &op->dentry->d_name;
534 struct afs_vnode_param *dvp = &op->file[0];
535 struct afs_call *call;
536 size_t namesz, reqsz, padsz;
537 __be32 *bp;
538
539 _enter("");
540
541 namesz = name->len;
542 padsz = (4 - (namesz & 3)) & 3;
543 reqsz = (5 * 4) + namesz + padsz + (6 * 4);
544
545 call = afs_alloc_flat_call(op->net, &afs_RXFSCreateFile,
546 reqsz, (3 + 21 + 21 + 3 + 6) * 4);
547 if (!call)
548 return afs_op_nomem(op);
549
550 /* marshall the parameters */
551 bp = call->request;
552 *bp++ = htonl(FSCREATEFILE);
553 *bp++ = htonl(dvp->fid.vid);
554 *bp++ = htonl(dvp->fid.vnode);
555 *bp++ = htonl(dvp->fid.unique);
556 *bp++ = htonl(namesz);
557 memcpy(bp, name->name, namesz);
558 bp = (void *) bp + namesz;
559 if (padsz > 0) {
560 memset(bp, 0, padsz);
561 bp = (void *) bp + padsz;
562 }
563 *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
564 *bp++ = htonl(op->mtime.tv_sec); /* mtime */
565 *bp++ = 0; /* owner */
566 *bp++ = 0; /* group */
567 *bp++ = htonl(op->create.mode & S_IALLUGO); /* unix mode */
568 *bp++ = 0; /* segment size */
569
570 call->fid = dvp->fid;
571 trace_afs_make_fs_call1(call, &dvp->fid, name);
572 afs_make_op_call(op, call, GFP_NOFS);
573}
574
575static const struct afs_call_type afs_RXFSMakeDir = {
576 .name = "FS.MakeDir",
577 .op = afs_FS_MakeDir,
578 .deliver = afs_deliver_fs_create_vnode,
579 .destructor = afs_flat_call_destructor,
580};
581
582/*
583 * Create a new directory
584 */
585void afs_fs_make_dir(struct afs_operation *op)
586{
587 const struct qstr *name = &op->dentry->d_name;
588 struct afs_vnode_param *dvp = &op->file[0];
589 struct afs_call *call;
590 size_t namesz, reqsz, padsz;
591 __be32 *bp;
592
593 _enter("");
594
595 namesz = name->len;
596 padsz = (4 - (namesz & 3)) & 3;
597 reqsz = (5 * 4) + namesz + padsz + (6 * 4);
598
599 call = afs_alloc_flat_call(op->net, &afs_RXFSMakeDir,
600 reqsz, (3 + 21 + 21 + 3 + 6) * 4);
601 if (!call)
602 return afs_op_nomem(op);
603
604 /* marshall the parameters */
605 bp = call->request;
606 *bp++ = htonl(FSMAKEDIR);
607 *bp++ = htonl(dvp->fid.vid);
608 *bp++ = htonl(dvp->fid.vnode);
609 *bp++ = htonl(dvp->fid.unique);
610 *bp++ = htonl(namesz);
611 memcpy(bp, name->name, namesz);
612 bp = (void *) bp + namesz;
613 if (padsz > 0) {
614 memset(bp, 0, padsz);
615 bp = (void *) bp + padsz;
616 }
617 *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
618 *bp++ = htonl(op->mtime.tv_sec); /* mtime */
619 *bp++ = 0; /* owner */
620 *bp++ = 0; /* group */
621 *bp++ = htonl(op->create.mode & S_IALLUGO); /* unix mode */
622 *bp++ = 0; /* segment size */
623
624 call->fid = dvp->fid;
625 trace_afs_make_fs_call1(call, &dvp->fid, name);
626 afs_make_op_call(op, call, GFP_NOFS);
627}
628
629/*
630 * Deliver reply data to any operation that returns status and volume sync.
631 */
632static int afs_deliver_fs_file_status_and_vol(struct afs_call *call)
633{
634 struct afs_operation *op = call->op;
635 struct afs_vnode_param *vp = &op->file[0];
636 const __be32 *bp;
637 int ret;
638
639 ret = afs_transfer_reply(call);
640 if (ret < 0)
641 return ret;
642
643 /* unmarshall the reply once we've received all of it */
644 bp = call->buffer;
645 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
646 xdr_decode_AFSVolSync(&bp, &op->volsync);
647
648 _leave(" = 0 [done]");
649 return 0;
650}
651
652/*
653 * FS.RemoveFile operation type
654 */
655static const struct afs_call_type afs_RXFSRemoveFile = {
656 .name = "FS.RemoveFile",
657 .op = afs_FS_RemoveFile,
658 .deliver = afs_deliver_fs_file_status_and_vol,
659 .destructor = afs_flat_call_destructor,
660};
661
662/*
663 * Remove a file.
664 */
665void afs_fs_remove_file(struct afs_operation *op)
666{
667 const struct qstr *name = &op->dentry->d_name;
668 struct afs_vnode_param *dvp = &op->file[0];
669 struct afs_call *call;
670 size_t namesz, reqsz, padsz;
671 __be32 *bp;
672
673 _enter("");
674
675 namesz = name->len;
676 padsz = (4 - (namesz & 3)) & 3;
677 reqsz = (5 * 4) + namesz + padsz;
678
679 call = afs_alloc_flat_call(op->net, &afs_RXFSRemoveFile,
680 reqsz, (21 + 6) * 4);
681 if (!call)
682 return afs_op_nomem(op);
683
684 /* marshall the parameters */
685 bp = call->request;
686 *bp++ = htonl(FSREMOVEFILE);
687 *bp++ = htonl(dvp->fid.vid);
688 *bp++ = htonl(dvp->fid.vnode);
689 *bp++ = htonl(dvp->fid.unique);
690 *bp++ = htonl(namesz);
691 memcpy(bp, name->name, namesz);
692 bp = (void *) bp + namesz;
693 if (padsz > 0) {
694 memset(bp, 0, padsz);
695 bp = (void *) bp + padsz;
696 }
697
698 call->fid = dvp->fid;
699 trace_afs_make_fs_call1(call, &dvp->fid, name);
700 afs_make_op_call(op, call, GFP_NOFS);
701}
702
703static const struct afs_call_type afs_RXFSRemoveDir = {
704 .name = "FS.RemoveDir",
705 .op = afs_FS_RemoveDir,
706 .deliver = afs_deliver_fs_file_status_and_vol,
707 .destructor = afs_flat_call_destructor,
708};
709
710/*
711 * Remove a directory.
712 */
713void afs_fs_remove_dir(struct afs_operation *op)
714{
715 const struct qstr *name = &op->dentry->d_name;
716 struct afs_vnode_param *dvp = &op->file[0];
717 struct afs_call *call;
718 size_t namesz, reqsz, padsz;
719 __be32 *bp;
720
721 _enter("");
722
723 namesz = name->len;
724 padsz = (4 - (namesz & 3)) & 3;
725 reqsz = (5 * 4) + namesz + padsz;
726
727 call = afs_alloc_flat_call(op->net, &afs_RXFSRemoveDir,
728 reqsz, (21 + 6) * 4);
729 if (!call)
730 return afs_op_nomem(op);
731
732 /* marshall the parameters */
733 bp = call->request;
734 *bp++ = htonl(FSREMOVEDIR);
735 *bp++ = htonl(dvp->fid.vid);
736 *bp++ = htonl(dvp->fid.vnode);
737 *bp++ = htonl(dvp->fid.unique);
738 *bp++ = htonl(namesz);
739 memcpy(bp, name->name, namesz);
740 bp = (void *) bp + namesz;
741 if (padsz > 0) {
742 memset(bp, 0, padsz);
743 bp = (void *) bp + padsz;
744 }
745
746 call->fid = dvp->fid;
747 trace_afs_make_fs_call1(call, &dvp->fid, name);
748 afs_make_op_call(op, call, GFP_NOFS);
749}
750
751/*
752 * deliver reply data to an FS.Link
753 */
754static int afs_deliver_fs_link(struct afs_call *call)
755{
756 struct afs_operation *op = call->op;
757 struct afs_vnode_param *dvp = &op->file[0];
758 struct afs_vnode_param *vp = &op->file[1];
759 const __be32 *bp;
760 int ret;
761
762 _enter("{%u}", call->unmarshall);
763
764 ret = afs_transfer_reply(call);
765 if (ret < 0)
766 return ret;
767
768 /* unmarshall the reply once we've received all of it */
769 bp = call->buffer;
770 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
771 xdr_decode_AFSFetchStatus(&bp, call, &dvp->scb);
772 xdr_decode_AFSVolSync(&bp, &op->volsync);
773
774 _leave(" = 0 [done]");
775 return 0;
776}
777
778/*
779 * FS.Link operation type
780 */
781static const struct afs_call_type afs_RXFSLink = {
782 .name = "FS.Link",
783 .op = afs_FS_Link,
784 .deliver = afs_deliver_fs_link,
785 .destructor = afs_flat_call_destructor,
786};
787
788/*
789 * make a hard link
790 */
791void afs_fs_link(struct afs_operation *op)
792{
793 const struct qstr *name = &op->dentry->d_name;
794 struct afs_vnode_param *dvp = &op->file[0];
795 struct afs_vnode_param *vp = &op->file[1];
796 struct afs_call *call;
797 size_t namesz, reqsz, padsz;
798 __be32 *bp;
799
800 _enter("");
801
802 namesz = name->len;
803 padsz = (4 - (namesz & 3)) & 3;
804 reqsz = (5 * 4) + namesz + padsz + (3 * 4);
805
806 call = afs_alloc_flat_call(op->net, &afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
807 if (!call)
808 return afs_op_nomem(op);
809
810 /* marshall the parameters */
811 bp = call->request;
812 *bp++ = htonl(FSLINK);
813 *bp++ = htonl(dvp->fid.vid);
814 *bp++ = htonl(dvp->fid.vnode);
815 *bp++ = htonl(dvp->fid.unique);
816 *bp++ = htonl(namesz);
817 memcpy(bp, name->name, namesz);
818 bp = (void *) bp + namesz;
819 if (padsz > 0) {
820 memset(bp, 0, padsz);
821 bp = (void *) bp + padsz;
822 }
823 *bp++ = htonl(vp->fid.vid);
824 *bp++ = htonl(vp->fid.vnode);
825 *bp++ = htonl(vp->fid.unique);
826
827 call->fid = vp->fid;
828 trace_afs_make_fs_call1(call, &vp->fid, name);
829 afs_make_op_call(op, call, GFP_NOFS);
830}
831
832/*
833 * deliver reply data to an FS.Symlink
834 */
835static int afs_deliver_fs_symlink(struct afs_call *call)
836{
837 struct afs_operation *op = call->op;
838 struct afs_vnode_param *dvp = &op->file[0];
839 struct afs_vnode_param *vp = &op->file[1];
840 const __be32 *bp;
841 int ret;
842
843 _enter("{%u}", call->unmarshall);
844
845 ret = afs_transfer_reply(call);
846 if (ret < 0)
847 return ret;
848
849 /* unmarshall the reply once we've received all of it */
850 bp = call->buffer;
851 xdr_decode_AFSFid(&bp, &vp->fid);
852 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
853 xdr_decode_AFSFetchStatus(&bp, call, &dvp->scb);
854 xdr_decode_AFSVolSync(&bp, &op->volsync);
855
856 _leave(" = 0 [done]");
857 return 0;
858}
859
860/*
861 * FS.Symlink operation type
862 */
863static const struct afs_call_type afs_RXFSSymlink = {
864 .name = "FS.Symlink",
865 .op = afs_FS_Symlink,
866 .deliver = afs_deliver_fs_symlink,
867 .destructor = afs_flat_call_destructor,
868};
869
870/*
871 * create a symbolic link
872 */
873void afs_fs_symlink(struct afs_operation *op)
874{
875 const struct qstr *name = &op->dentry->d_name;
876 struct afs_vnode_param *dvp = &op->file[0];
877 struct afs_call *call;
878 size_t namesz, reqsz, padsz, c_namesz, c_padsz;
879 __be32 *bp;
880
881 _enter("");
882
883 namesz = name->len;
884 padsz = (4 - (namesz & 3)) & 3;
885
886 c_namesz = strlen(op->create.symlink);
887 c_padsz = (4 - (c_namesz & 3)) & 3;
888
889 reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4);
890
891 call = afs_alloc_flat_call(op->net, &afs_RXFSSymlink, reqsz,
892 (3 + 21 + 21 + 6) * 4);
893 if (!call)
894 return afs_op_nomem(op);
895
896 /* marshall the parameters */
897 bp = call->request;
898 *bp++ = htonl(FSSYMLINK);
899 *bp++ = htonl(dvp->fid.vid);
900 *bp++ = htonl(dvp->fid.vnode);
901 *bp++ = htonl(dvp->fid.unique);
902 *bp++ = htonl(namesz);
903 memcpy(bp, name->name, namesz);
904 bp = (void *) bp + namesz;
905 if (padsz > 0) {
906 memset(bp, 0, padsz);
907 bp = (void *) bp + padsz;
908 }
909 *bp++ = htonl(c_namesz);
910 memcpy(bp, op->create.symlink, c_namesz);
911 bp = (void *) bp + c_namesz;
912 if (c_padsz > 0) {
913 memset(bp, 0, c_padsz);
914 bp = (void *) bp + c_padsz;
915 }
916 *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
917 *bp++ = htonl(op->mtime.tv_sec); /* mtime */
918 *bp++ = 0; /* owner */
919 *bp++ = 0; /* group */
920 *bp++ = htonl(S_IRWXUGO); /* unix mode */
921 *bp++ = 0; /* segment size */
922
923 call->fid = dvp->fid;
924 trace_afs_make_fs_call1(call, &dvp->fid, name);
925 afs_make_op_call(op, call, GFP_NOFS);
926}
927
928/*
929 * deliver reply data to an FS.Rename
930 */
931static int afs_deliver_fs_rename(struct afs_call *call)
932{
933 struct afs_operation *op = call->op;
934 struct afs_vnode_param *orig_dvp = &op->file[0];
935 struct afs_vnode_param *new_dvp = &op->file[1];
936 const __be32 *bp;
937 int ret;
938
939 ret = afs_transfer_reply(call);
940 if (ret < 0)
941 return ret;
942
943 bp = call->buffer;
944 /* If the two dirs are the same, we have two copies of the same status
945 * report, so we just decode it twice.
946 */
947 xdr_decode_AFSFetchStatus(&bp, call, &orig_dvp->scb);
948 xdr_decode_AFSFetchStatus(&bp, call, &new_dvp->scb);
949 xdr_decode_AFSVolSync(&bp, &op->volsync);
950
951 _leave(" = 0 [done]");
952 return 0;
953}
954
955/*
956 * FS.Rename operation type
957 */
958static const struct afs_call_type afs_RXFSRename = {
959 .name = "FS.Rename",
960 .op = afs_FS_Rename,
961 .deliver = afs_deliver_fs_rename,
962 .destructor = afs_flat_call_destructor,
963};
964
965/*
966 * Rename/move a file or directory.
967 */
968void afs_fs_rename(struct afs_operation *op)
969{
970 struct afs_vnode_param *orig_dvp = &op->file[0];
971 struct afs_vnode_param *new_dvp = &op->file[1];
972 const struct qstr *orig_name = &op->dentry->d_name;
973 const struct qstr *new_name = &op->dentry_2->d_name;
974 struct afs_call *call;
975 size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz;
976 __be32 *bp;
977
978 _enter("");
979
980 o_namesz = orig_name->len;
981 o_padsz = (4 - (o_namesz & 3)) & 3;
982
983 n_namesz = new_name->len;
984 n_padsz = (4 - (n_namesz & 3)) & 3;
985
986 reqsz = (4 * 4) +
987 4 + o_namesz + o_padsz +
988 (3 * 4) +
989 4 + n_namesz + n_padsz;
990
991 call = afs_alloc_flat_call(op->net, &afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
992 if (!call)
993 return afs_op_nomem(op);
994
995 /* marshall the parameters */
996 bp = call->request;
997 *bp++ = htonl(FSRENAME);
998 *bp++ = htonl(orig_dvp->fid.vid);
999 *bp++ = htonl(orig_dvp->fid.vnode);
1000 *bp++ = htonl(orig_dvp->fid.unique);
1001 *bp++ = htonl(o_namesz);
1002 memcpy(bp, orig_name->name, o_namesz);
1003 bp = (void *) bp + o_namesz;
1004 if (o_padsz > 0) {
1005 memset(bp, 0, o_padsz);
1006 bp = (void *) bp + o_padsz;
1007 }
1008
1009 *bp++ = htonl(new_dvp->fid.vid);
1010 *bp++ = htonl(new_dvp->fid.vnode);
1011 *bp++ = htonl(new_dvp->fid.unique);
1012 *bp++ = htonl(n_namesz);
1013 memcpy(bp, new_name->name, n_namesz);
1014 bp = (void *) bp + n_namesz;
1015 if (n_padsz > 0) {
1016 memset(bp, 0, n_padsz);
1017 bp = (void *) bp + n_padsz;
1018 }
1019
1020 call->fid = orig_dvp->fid;
1021 trace_afs_make_fs_call2(call, &orig_dvp->fid, orig_name, new_name);
1022 afs_make_op_call(op, call, GFP_NOFS);
1023}
1024
1025/*
1026 * Deliver reply data to FS.StoreData or FS.StoreStatus
1027 */
1028static int afs_deliver_fs_store_data(struct afs_call *call)
1029{
1030 struct afs_operation *op = call->op;
1031 struct afs_vnode_param *vp = &op->file[0];
1032 const __be32 *bp;
1033 int ret;
1034
1035 _enter("");
1036
1037 ret = afs_transfer_reply(call);
1038 if (ret < 0)
1039 return ret;
1040
1041 /* unmarshall the reply once we've received all of it */
1042 bp = call->buffer;
1043 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
1044 xdr_decode_AFSVolSync(&bp, &op->volsync);
1045
1046 _leave(" = 0 [done]");
1047 return 0;
1048}
1049
1050/*
1051 * FS.StoreData operation type
1052 */
1053static const struct afs_call_type afs_RXFSStoreData = {
1054 .name = "FS.StoreData",
1055 .op = afs_FS_StoreData,
1056 .deliver = afs_deliver_fs_store_data,
1057 .destructor = afs_flat_call_destructor,
1058};
1059
1060static const struct afs_call_type afs_RXFSStoreData64 = {
1061 .name = "FS.StoreData64",
1062 .op = afs_FS_StoreData64,
1063 .deliver = afs_deliver_fs_store_data,
1064 .destructor = afs_flat_call_destructor,
1065};
1066
1067/*
1068 * store a set of pages to a very large file
1069 */
1070static void afs_fs_store_data64(struct afs_operation *op)
1071{
1072 struct afs_vnode_param *vp = &op->file[0];
1073 struct afs_call *call;
1074 __be32 *bp;
1075
1076 _enter(",%x,{%llx:%llu},,",
1077 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1078
1079 call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData64,
1080 (4 + 6 + 3 * 2) * 4,
1081 (21 + 6) * 4);
1082 if (!call)
1083 return afs_op_nomem(op);
1084
1085 call->write_iter = op->store.write_iter;
1086
1087 /* marshall the parameters */
1088 bp = call->request;
1089 *bp++ = htonl(FSSTOREDATA64);
1090 *bp++ = htonl(vp->fid.vid);
1091 *bp++ = htonl(vp->fid.vnode);
1092 *bp++ = htonl(vp->fid.unique);
1093
1094 *bp++ = htonl(AFS_SET_MTIME); /* mask */
1095 *bp++ = htonl(op->mtime.tv_sec); /* mtime */
1096 *bp++ = 0; /* owner */
1097 *bp++ = 0; /* group */
1098 *bp++ = 0; /* unix mode */
1099 *bp++ = 0; /* segment size */
1100
1101 *bp++ = htonl(upper_32_bits(op->store.pos));
1102 *bp++ = htonl(lower_32_bits(op->store.pos));
1103 *bp++ = htonl(upper_32_bits(op->store.size));
1104 *bp++ = htonl(lower_32_bits(op->store.size));
1105 *bp++ = htonl(upper_32_bits(op->store.i_size));
1106 *bp++ = htonl(lower_32_bits(op->store.i_size));
1107
1108 call->fid = vp->fid;
1109 trace_afs_make_fs_call(call, &vp->fid);
1110 afs_make_op_call(op, call, GFP_NOFS);
1111}
1112
1113/*
1114 * Write data to a file on the server.
1115 */
1116void afs_fs_store_data(struct afs_operation *op)
1117{
1118 struct afs_vnode_param *vp = &op->file[0];
1119 struct afs_call *call;
1120 __be32 *bp;
1121
1122 _enter(",%x,{%llx:%llu},,",
1123 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1124
1125 _debug("size %llx, at %llx, i_size %llx",
1126 (unsigned long long)op->store.size,
1127 (unsigned long long)op->store.pos,
1128 (unsigned long long)op->store.i_size);
1129
1130 if (test_bit(AFS_SERVER_FL_HAS_FS64, &op->server->flags))
1131 return afs_fs_store_data64(op);
1132
1133 call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData,
1134 (4 + 6 + 3) * 4,
1135 (21 + 6) * 4);
1136 if (!call)
1137 return afs_op_nomem(op);
1138
1139 call->write_iter = op->store.write_iter;
1140
1141 /* marshall the parameters */
1142 bp = call->request;
1143 *bp++ = htonl(FSSTOREDATA);
1144 *bp++ = htonl(vp->fid.vid);
1145 *bp++ = htonl(vp->fid.vnode);
1146 *bp++ = htonl(vp->fid.unique);
1147
1148 *bp++ = htonl(AFS_SET_MTIME); /* mask */
1149 *bp++ = htonl(op->mtime.tv_sec); /* mtime */
1150 *bp++ = 0; /* owner */
1151 *bp++ = 0; /* group */
1152 *bp++ = 0; /* unix mode */
1153 *bp++ = 0; /* segment size */
1154
1155 *bp++ = htonl(lower_32_bits(op->store.pos));
1156 *bp++ = htonl(lower_32_bits(op->store.size));
1157 *bp++ = htonl(lower_32_bits(op->store.i_size));
1158
1159 call->fid = vp->fid;
1160 trace_afs_make_fs_call(call, &vp->fid);
1161 afs_make_op_call(op, call, GFP_NOFS);
1162}
1163
1164/*
1165 * FS.StoreStatus operation type
1166 */
1167static const struct afs_call_type afs_RXFSStoreStatus = {
1168 .name = "FS.StoreStatus",
1169 .op = afs_FS_StoreStatus,
1170 .deliver = afs_deliver_fs_store_data,
1171 .destructor = afs_flat_call_destructor,
1172};
1173
1174static const struct afs_call_type afs_RXFSStoreData_as_Status = {
1175 .name = "FS.StoreData",
1176 .op = afs_FS_StoreData,
1177 .deliver = afs_deliver_fs_store_data,
1178 .destructor = afs_flat_call_destructor,
1179};
1180
1181static const struct afs_call_type afs_RXFSStoreData64_as_Status = {
1182 .name = "FS.StoreData64",
1183 .op = afs_FS_StoreData64,
1184 .deliver = afs_deliver_fs_store_data,
1185 .destructor = afs_flat_call_destructor,
1186};
1187
1188/*
1189 * set the attributes on a very large file, using FS.StoreData rather than
1190 * FS.StoreStatus so as to alter the file size also
1191 */
1192static void afs_fs_setattr_size64(struct afs_operation *op)
1193{
1194 struct afs_vnode_param *vp = &op->file[0];
1195 struct afs_call *call;
1196 struct iattr *attr = op->setattr.attr;
1197 __be32 *bp;
1198
1199 _enter(",%x,{%llx:%llu},,",
1200 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1201
1202 ASSERT(attr->ia_valid & ATTR_SIZE);
1203
1204 call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData64_as_Status,
1205 (4 + 6 + 3 * 2) * 4,
1206 (21 + 6) * 4);
1207 if (!call)
1208 return afs_op_nomem(op);
1209
1210 /* marshall the parameters */
1211 bp = call->request;
1212 *bp++ = htonl(FSSTOREDATA64);
1213 *bp++ = htonl(vp->fid.vid);
1214 *bp++ = htonl(vp->fid.vnode);
1215 *bp++ = htonl(vp->fid.unique);
1216
1217 xdr_encode_AFS_StoreStatus(&bp, attr);
1218
1219 *bp++ = htonl(upper_32_bits(attr->ia_size)); /* position of start of write */
1220 *bp++ = htonl(lower_32_bits(attr->ia_size));
1221 *bp++ = 0; /* size of write */
1222 *bp++ = 0;
1223 *bp++ = htonl(upper_32_bits(attr->ia_size)); /* new file length */
1224 *bp++ = htonl(lower_32_bits(attr->ia_size));
1225
1226 call->fid = vp->fid;
1227 trace_afs_make_fs_call(call, &vp->fid);
1228 afs_make_op_call(op, call, GFP_NOFS);
1229}
1230
1231/*
1232 * set the attributes on a file, using FS.StoreData rather than FS.StoreStatus
1233 * so as to alter the file size also
1234 */
1235static void afs_fs_setattr_size(struct afs_operation *op)
1236{
1237 struct afs_vnode_param *vp = &op->file[0];
1238 struct afs_call *call;
1239 struct iattr *attr = op->setattr.attr;
1240 __be32 *bp;
1241
1242 _enter(",%x,{%llx:%llu},,",
1243 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1244
1245 ASSERT(attr->ia_valid & ATTR_SIZE);
1246 if (test_bit(AFS_SERVER_FL_HAS_FS64, &op->server->flags))
1247 return afs_fs_setattr_size64(op);
1248
1249 call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData_as_Status,
1250 (4 + 6 + 3) * 4,
1251 (21 + 6) * 4);
1252 if (!call)
1253 return afs_op_nomem(op);
1254
1255 /* marshall the parameters */
1256 bp = call->request;
1257 *bp++ = htonl(FSSTOREDATA);
1258 *bp++ = htonl(vp->fid.vid);
1259 *bp++ = htonl(vp->fid.vnode);
1260 *bp++ = htonl(vp->fid.unique);
1261
1262 xdr_encode_AFS_StoreStatus(&bp, attr);
1263
1264 *bp++ = htonl(attr->ia_size); /* position of start of write */
1265 *bp++ = 0; /* size of write */
1266 *bp++ = htonl(attr->ia_size); /* new file length */
1267
1268 call->fid = vp->fid;
1269 trace_afs_make_fs_call(call, &vp->fid);
1270 afs_make_op_call(op, call, GFP_NOFS);
1271}
1272
1273/*
1274 * set the attributes on a file, using FS.StoreData if there's a change in file
1275 * size, and FS.StoreStatus otherwise
1276 */
1277void afs_fs_setattr(struct afs_operation *op)
1278{
1279 struct afs_vnode_param *vp = &op->file[0];
1280 struct afs_call *call;
1281 struct iattr *attr = op->setattr.attr;
1282 __be32 *bp;
1283
1284 if (attr->ia_valid & ATTR_SIZE)
1285 return afs_fs_setattr_size(op);
1286
1287 _enter(",%x,{%llx:%llu},,",
1288 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1289
1290 call = afs_alloc_flat_call(op->net, &afs_RXFSStoreStatus,
1291 (4 + 6) * 4,
1292 (21 + 6) * 4);
1293 if (!call)
1294 return afs_op_nomem(op);
1295
1296 /* marshall the parameters */
1297 bp = call->request;
1298 *bp++ = htonl(FSSTORESTATUS);
1299 *bp++ = htonl(vp->fid.vid);
1300 *bp++ = htonl(vp->fid.vnode);
1301 *bp++ = htonl(vp->fid.unique);
1302
1303 xdr_encode_AFS_StoreStatus(&bp, op->setattr.attr);
1304
1305 call->fid = vp->fid;
1306 trace_afs_make_fs_call(call, &vp->fid);
1307 afs_make_op_call(op, call, GFP_NOFS);
1308}
1309
1310/*
1311 * deliver reply data to an FS.GetVolumeStatus
1312 */
1313static int afs_deliver_fs_get_volume_status(struct afs_call *call)
1314{
1315 struct afs_operation *op = call->op;
1316 const __be32 *bp;
1317 char *p;
1318 u32 size;
1319 int ret;
1320
1321 _enter("{%u}", call->unmarshall);
1322
1323 switch (call->unmarshall) {
1324 case 0:
1325 call->unmarshall++;
1326 afs_extract_to_buf(call, 12 * 4);
1327 fallthrough;
1328
1329 /* extract the returned status record */
1330 case 1:
1331 _debug("extract status");
1332 ret = afs_extract_data(call, true);
1333 if (ret < 0)
1334 return ret;
1335
1336 bp = call->buffer;
1337 xdr_decode_AFSFetchVolumeStatus(&bp, &op->volstatus.vs);
1338 call->unmarshall++;
1339 afs_extract_to_tmp(call);
1340 fallthrough;
1341
1342 /* extract the volume name length */
1343 case 2:
1344 ret = afs_extract_data(call, true);
1345 if (ret < 0)
1346 return ret;
1347
1348 call->count = ntohl(call->tmp);
1349 _debug("volname length: %u", call->count);
1350 if (call->count >= AFSNAMEMAX)
1351 return afs_protocol_error(call, afs_eproto_volname_len);
1352 size = (call->count + 3) & ~3; /* It's padded */
1353 afs_extract_to_buf(call, size);
1354 call->unmarshall++;
1355 fallthrough;
1356
1357 /* extract the volume name */
1358 case 3:
1359 _debug("extract volname");
1360 ret = afs_extract_data(call, true);
1361 if (ret < 0)
1362 return ret;
1363
1364 p = call->buffer;
1365 p[call->count] = 0;
1366 _debug("volname '%s'", p);
1367 afs_extract_to_tmp(call);
1368 call->unmarshall++;
1369 fallthrough;
1370
1371 /* extract the offline message length */
1372 case 4:
1373 ret = afs_extract_data(call, true);
1374 if (ret < 0)
1375 return ret;
1376
1377 call->count = ntohl(call->tmp);
1378 _debug("offline msg length: %u", call->count);
1379 if (call->count >= AFSNAMEMAX)
1380 return afs_protocol_error(call, afs_eproto_offline_msg_len);
1381 size = (call->count + 3) & ~3; /* It's padded */
1382 afs_extract_to_buf(call, size);
1383 call->unmarshall++;
1384 fallthrough;
1385
1386 /* extract the offline message */
1387 case 5:
1388 _debug("extract offline");
1389 ret = afs_extract_data(call, true);
1390 if (ret < 0)
1391 return ret;
1392
1393 p = call->buffer;
1394 p[call->count] = 0;
1395 _debug("offline '%s'", p);
1396
1397 afs_extract_to_tmp(call);
1398 call->unmarshall++;
1399 fallthrough;
1400
1401 /* extract the message of the day length */
1402 case 6:
1403 ret = afs_extract_data(call, true);
1404 if (ret < 0)
1405 return ret;
1406
1407 call->count = ntohl(call->tmp);
1408 _debug("motd length: %u", call->count);
1409 if (call->count >= AFSNAMEMAX)
1410 return afs_protocol_error(call, afs_eproto_motd_len);
1411 size = (call->count + 3) & ~3; /* It's padded */
1412 afs_extract_to_buf(call, size);
1413 call->unmarshall++;
1414 fallthrough;
1415
1416 /* extract the message of the day */
1417 case 7:
1418 _debug("extract motd");
1419 ret = afs_extract_data(call, false);
1420 if (ret < 0)
1421 return ret;
1422
1423 p = call->buffer;
1424 p[call->count] = 0;
1425 _debug("motd '%s'", p);
1426
1427 call->unmarshall++;
1428 fallthrough;
1429
1430 case 8:
1431 break;
1432 }
1433
1434 _leave(" = 0 [done]");
1435 return 0;
1436}
1437
1438/*
1439 * FS.GetVolumeStatus operation type
1440 */
1441static const struct afs_call_type afs_RXFSGetVolumeStatus = {
1442 .name = "FS.GetVolumeStatus",
1443 .op = afs_FS_GetVolumeStatus,
1444 .deliver = afs_deliver_fs_get_volume_status,
1445 .destructor = afs_flat_call_destructor,
1446};
1447
1448/*
1449 * fetch the status of a volume
1450 */
1451void afs_fs_get_volume_status(struct afs_operation *op)
1452{
1453 struct afs_vnode_param *vp = &op->file[0];
1454 struct afs_call *call;
1455 __be32 *bp;
1456
1457 _enter("");
1458
1459 call = afs_alloc_flat_call(op->net, &afs_RXFSGetVolumeStatus, 2 * 4,
1460 max(12 * 4, AFSOPAQUEMAX + 1));
1461 if (!call)
1462 return afs_op_nomem(op);
1463
1464 /* marshall the parameters */
1465 bp = call->request;
1466 bp[0] = htonl(FSGETVOLUMESTATUS);
1467 bp[1] = htonl(vp->fid.vid);
1468
1469 call->fid = vp->fid;
1470 trace_afs_make_fs_call(call, &vp->fid);
1471 afs_make_op_call(op, call, GFP_NOFS);
1472}
1473
1474/*
1475 * deliver reply data to an FS.SetLock, FS.ExtendLock or FS.ReleaseLock
1476 */
1477static int afs_deliver_fs_xxxx_lock(struct afs_call *call)
1478{
1479 struct afs_operation *op = call->op;
1480 const __be32 *bp;
1481 int ret;
1482
1483 _enter("{%u}", call->unmarshall);
1484
1485 ret = afs_transfer_reply(call);
1486 if (ret < 0)
1487 return ret;
1488
1489 /* unmarshall the reply once we've received all of it */
1490 bp = call->buffer;
1491 xdr_decode_AFSVolSync(&bp, &op->volsync);
1492
1493 _leave(" = 0 [done]");
1494 return 0;
1495}
1496
1497/*
1498 * FS.SetLock operation type
1499 */
1500static const struct afs_call_type afs_RXFSSetLock = {
1501 .name = "FS.SetLock",
1502 .op = afs_FS_SetLock,
1503 .deliver = afs_deliver_fs_xxxx_lock,
1504 .done = afs_lock_op_done,
1505 .destructor = afs_flat_call_destructor,
1506};
1507
1508/*
1509 * FS.ExtendLock operation type
1510 */
1511static const struct afs_call_type afs_RXFSExtendLock = {
1512 .name = "FS.ExtendLock",
1513 .op = afs_FS_ExtendLock,
1514 .deliver = afs_deliver_fs_xxxx_lock,
1515 .done = afs_lock_op_done,
1516 .destructor = afs_flat_call_destructor,
1517};
1518
1519/*
1520 * FS.ReleaseLock operation type
1521 */
1522static const struct afs_call_type afs_RXFSReleaseLock = {
1523 .name = "FS.ReleaseLock",
1524 .op = afs_FS_ReleaseLock,
1525 .deliver = afs_deliver_fs_xxxx_lock,
1526 .destructor = afs_flat_call_destructor,
1527};
1528
1529/*
1530 * Set a lock on a file
1531 */
1532void afs_fs_set_lock(struct afs_operation *op)
1533{
1534 struct afs_vnode_param *vp = &op->file[0];
1535 struct afs_call *call;
1536 __be32 *bp;
1537
1538 _enter("");
1539
1540 call = afs_alloc_flat_call(op->net, &afs_RXFSSetLock, 5 * 4, 6 * 4);
1541 if (!call)
1542 return afs_op_nomem(op);
1543
1544 /* marshall the parameters */
1545 bp = call->request;
1546 *bp++ = htonl(FSSETLOCK);
1547 *bp++ = htonl(vp->fid.vid);
1548 *bp++ = htonl(vp->fid.vnode);
1549 *bp++ = htonl(vp->fid.unique);
1550 *bp++ = htonl(op->lock.type);
1551
1552 call->fid = vp->fid;
1553 trace_afs_make_fs_calli(call, &vp->fid, op->lock.type);
1554 afs_make_op_call(op, call, GFP_NOFS);
1555}
1556
1557/*
1558 * extend a lock on a file
1559 */
1560void afs_fs_extend_lock(struct afs_operation *op)
1561{
1562 struct afs_vnode_param *vp = &op->file[0];
1563 struct afs_call *call;
1564 __be32 *bp;
1565
1566 _enter("");
1567
1568 call = afs_alloc_flat_call(op->net, &afs_RXFSExtendLock, 4 * 4, 6 * 4);
1569 if (!call)
1570 return afs_op_nomem(op);
1571
1572 /* marshall the parameters */
1573 bp = call->request;
1574 *bp++ = htonl(FSEXTENDLOCK);
1575 *bp++ = htonl(vp->fid.vid);
1576 *bp++ = htonl(vp->fid.vnode);
1577 *bp++ = htonl(vp->fid.unique);
1578
1579 call->fid = vp->fid;
1580 trace_afs_make_fs_call(call, &vp->fid);
1581 afs_make_op_call(op, call, GFP_NOFS);
1582}
1583
1584/*
1585 * release a lock on a file
1586 */
1587void afs_fs_release_lock(struct afs_operation *op)
1588{
1589 struct afs_vnode_param *vp = &op->file[0];
1590 struct afs_call *call;
1591 __be32 *bp;
1592
1593 _enter("");
1594
1595 call = afs_alloc_flat_call(op->net, &afs_RXFSReleaseLock, 4 * 4, 6 * 4);
1596 if (!call)
1597 return afs_op_nomem(op);
1598
1599 /* marshall the parameters */
1600 bp = call->request;
1601 *bp++ = htonl(FSRELEASELOCK);
1602 *bp++ = htonl(vp->fid.vid);
1603 *bp++ = htonl(vp->fid.vnode);
1604 *bp++ = htonl(vp->fid.unique);
1605
1606 call->fid = vp->fid;
1607 trace_afs_make_fs_call(call, &vp->fid);
1608 afs_make_op_call(op, call, GFP_NOFS);
1609}
1610
1611/*
1612 * Deliver reply data to an FS.GiveUpAllCallBacks operation.
1613 */
1614static int afs_deliver_fs_give_up_all_callbacks(struct afs_call *call)
1615{
1616 return afs_transfer_reply(call);
1617}
1618
1619/*
1620 * FS.GiveUpAllCallBacks operation type
1621 */
1622static const struct afs_call_type afs_RXFSGiveUpAllCallBacks = {
1623 .name = "FS.GiveUpAllCallBacks",
1624 .op = afs_FS_GiveUpAllCallBacks,
1625 .deliver = afs_deliver_fs_give_up_all_callbacks,
1626 .destructor = afs_flat_call_destructor,
1627};
1628
1629/*
1630 * Flush all the callbacks we have on a server.
1631 */
1632int afs_fs_give_up_all_callbacks(struct afs_net *net, struct afs_server *server,
1633 struct afs_address *addr, struct key *key)
1634{
1635 struct afs_call *call;
1636 __be32 *bp;
1637 int ret;
1638
1639 _enter("");
1640
1641 call = afs_alloc_flat_call(net, &afs_RXFSGiveUpAllCallBacks, 1 * 4, 0);
1642 if (!call)
1643 return -ENOMEM;
1644
1645 call->key = key;
1646 call->peer = rxrpc_kernel_get_peer(addr->peer);
1647 call->service_id = server->service_id;
1648
1649 /* marshall the parameters */
1650 bp = call->request;
1651 *bp++ = htonl(FSGIVEUPALLCALLBACKS);
1652
1653 call->server = afs_use_server(server, afs_server_trace_give_up_cb);
1654 afs_make_call(call, GFP_NOFS);
1655 afs_wait_for_call_to_complete(call);
1656 ret = call->error;
1657 if (call->responded)
1658 set_bit(AFS_SERVER_FL_RESPONDING, &server->flags);
1659 afs_put_call(call);
1660 return ret;
1661}
1662
1663/*
1664 * Deliver reply data to an FS.GetCapabilities operation.
1665 */
1666static int afs_deliver_fs_get_capabilities(struct afs_call *call)
1667{
1668 u32 count;
1669 int ret;
1670
1671 _enter("{%u,%zu}", call->unmarshall, iov_iter_count(call->iter));
1672
1673 switch (call->unmarshall) {
1674 case 0:
1675 afs_extract_to_tmp(call);
1676 call->unmarshall++;
1677 fallthrough;
1678
1679 /* Extract the capabilities word count */
1680 case 1:
1681 ret = afs_extract_data(call, true);
1682 if (ret < 0)
1683 return ret;
1684
1685 count = ntohl(call->tmp);
1686 call->count = count;
1687 call->count2 = count;
1688 if (count == 0) {
1689 call->unmarshall = 4;
1690 call->tmp = 0;
1691 break;
1692 }
1693
1694 /* Extract the first word of the capabilities to call->tmp */
1695 afs_extract_to_tmp(call);
1696 call->unmarshall++;
1697 fallthrough;
1698
1699 case 2:
1700 ret = afs_extract_data(call, false);
1701 if (ret < 0)
1702 return ret;
1703
1704 afs_extract_discard(call, (count - 1) * sizeof(__be32));
1705 call->unmarshall++;
1706 fallthrough;
1707
1708 /* Extract remaining capabilities words */
1709 case 3:
1710 ret = afs_extract_data(call, false);
1711 if (ret < 0)
1712 return ret;
1713
1714 call->unmarshall++;
1715 break;
1716 }
1717
1718 _leave(" = 0 [done]");
1719 return 0;
1720}
1721
1722static void afs_fs_get_capabilities_destructor(struct afs_call *call)
1723{
1724 afs_put_endpoint_state(call->probe, afs_estate_trace_put_getcaps);
1725 afs_flat_call_destructor(call);
1726}
1727
1728/*
1729 * FS.GetCapabilities operation type
1730 */
1731static const struct afs_call_type afs_RXFSGetCapabilities = {
1732 .name = "FS.GetCapabilities",
1733 .op = afs_FS_GetCapabilities,
1734 .deliver = afs_deliver_fs_get_capabilities,
1735 .done = afs_fileserver_probe_result,
1736 .destructor = afs_fs_get_capabilities_destructor,
1737};
1738
1739/*
1740 * Probe a fileserver for the capabilities that it supports. This RPC can
1741 * reply with up to 196 words. The operation is asynchronous and if we managed
1742 * to allocate a call, true is returned the result is delivered through the
1743 * ->done() - otherwise we return false to indicate we didn't even try.
1744 */
1745bool afs_fs_get_capabilities(struct afs_net *net, struct afs_server *server,
1746 struct afs_endpoint_state *estate, unsigned int addr_index,
1747 struct key *key)
1748{
1749 struct afs_call *call;
1750 __be32 *bp;
1751
1752 _enter("");
1753
1754 call = afs_alloc_flat_call(net, &afs_RXFSGetCapabilities, 1 * 4, 16 * 4);
1755 if (!call)
1756 return false;
1757
1758 call->key = key;
1759 call->server = afs_use_server(server, afs_server_trace_get_caps);
1760 call->peer = rxrpc_kernel_get_peer(estate->addresses->addrs[addr_index].peer);
1761 call->probe = afs_get_endpoint_state(estate, afs_estate_trace_get_getcaps);
1762 call->probe_index = addr_index;
1763 call->service_id = server->service_id;
1764 call->upgrade = true;
1765 call->async = true;
1766 call->max_lifespan = AFS_PROBE_MAX_LIFESPAN;
1767
1768 /* marshall the parameters */
1769 bp = call->request;
1770 *bp++ = htonl(FSGETCAPABILITIES);
1771
1772 trace_afs_make_fs_call(call, NULL);
1773 afs_make_call(call, GFP_NOFS);
1774 afs_put_call(call);
1775 return true;
1776}
1777
1778/*
1779 * Deliver reply data to an FS.InlineBulkStatus call
1780 */
1781static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
1782{
1783 struct afs_operation *op = call->op;
1784 struct afs_status_cb *scb;
1785 const __be32 *bp;
1786 u32 tmp;
1787 int ret;
1788
1789 _enter("{%u}", call->unmarshall);
1790
1791 switch (call->unmarshall) {
1792 case 0:
1793 afs_extract_to_tmp(call);
1794 call->unmarshall++;
1795 fallthrough;
1796
1797 /* Extract the file status count and array in two steps */
1798 case 1:
1799 _debug("extract status count");
1800 ret = afs_extract_data(call, true);
1801 if (ret < 0)
1802 return ret;
1803
1804 tmp = ntohl(call->tmp);
1805 _debug("status count: %u/%u", tmp, op->nr_files);
1806 if (tmp != op->nr_files)
1807 return afs_protocol_error(call, afs_eproto_ibulkst_count);
1808
1809 call->count = 0;
1810 call->unmarshall++;
1811 more_counts:
1812 afs_extract_to_buf(call, 21 * sizeof(__be32));
1813 fallthrough;
1814
1815 case 2:
1816 _debug("extract status array %u", call->count);
1817 ret = afs_extract_data(call, true);
1818 if (ret < 0)
1819 return ret;
1820
1821 switch (call->count) {
1822 case 0:
1823 scb = &op->file[0].scb;
1824 break;
1825 case 1:
1826 scb = &op->file[1].scb;
1827 break;
1828 default:
1829 scb = &op->more_files[call->count - 2].scb;
1830 break;
1831 }
1832
1833 bp = call->buffer;
1834 xdr_decode_AFSFetchStatus(&bp, call, scb);
1835
1836 call->count++;
1837 if (call->count < op->nr_files)
1838 goto more_counts;
1839
1840 call->count = 0;
1841 call->unmarshall++;
1842 afs_extract_to_tmp(call);
1843 fallthrough;
1844
1845 /* Extract the callback count and array in two steps */
1846 case 3:
1847 _debug("extract CB count");
1848 ret = afs_extract_data(call, true);
1849 if (ret < 0)
1850 return ret;
1851
1852 tmp = ntohl(call->tmp);
1853 _debug("CB count: %u", tmp);
1854 if (tmp != op->nr_files)
1855 return afs_protocol_error(call, afs_eproto_ibulkst_cb_count);
1856 call->count = 0;
1857 call->unmarshall++;
1858 more_cbs:
1859 afs_extract_to_buf(call, 3 * sizeof(__be32));
1860 fallthrough;
1861
1862 case 4:
1863 _debug("extract CB array");
1864 ret = afs_extract_data(call, true);
1865 if (ret < 0)
1866 return ret;
1867
1868 _debug("unmarshall CB array");
1869 switch (call->count) {
1870 case 0:
1871 scb = &op->file[0].scb;
1872 break;
1873 case 1:
1874 scb = &op->file[1].scb;
1875 break;
1876 default:
1877 scb = &op->more_files[call->count - 2].scb;
1878 break;
1879 }
1880
1881 bp = call->buffer;
1882 xdr_decode_AFSCallBack(&bp, call, scb);
1883 call->count++;
1884 if (call->count < op->nr_files)
1885 goto more_cbs;
1886
1887 afs_extract_to_buf(call, 6 * sizeof(__be32));
1888 call->unmarshall++;
1889 fallthrough;
1890
1891 case 5:
1892 ret = afs_extract_data(call, false);
1893 if (ret < 0)
1894 return ret;
1895
1896 bp = call->buffer;
1897 /* Unfortunately, prior to OpenAFS-1.6, volsync here is filled
1898 * with rubbish.
1899 */
1900 xdr_decode_AFSVolSync(&bp, NULL);
1901
1902 call->unmarshall++;
1903 fallthrough;
1904
1905 case 6:
1906 break;
1907 }
1908
1909 _leave(" = 0 [done]");
1910 return 0;
1911}
1912
1913static void afs_done_fs_inline_bulk_status(struct afs_call *call)
1914{
1915 if (call->error == -ECONNABORTED &&
1916 call->abort_code == RX_INVALID_OPERATION) {
1917 set_bit(AFS_SERVER_FL_NO_IBULK, &call->server->flags);
1918 if (call->op)
1919 set_bit(AFS_VOLUME_MAYBE_NO_IBULK, &call->op->volume->flags);
1920 }
1921}
1922
1923/*
1924 * FS.InlineBulkStatus operation type
1925 */
1926static const struct afs_call_type afs_RXFSInlineBulkStatus = {
1927 .name = "FS.InlineBulkStatus",
1928 .op = afs_FS_InlineBulkStatus,
1929 .deliver = afs_deliver_fs_inline_bulk_status,
1930 .done = afs_done_fs_inline_bulk_status,
1931 .destructor = afs_flat_call_destructor,
1932};
1933
1934/*
1935 * Fetch the status information for up to 50 files
1936 */
1937void afs_fs_inline_bulk_status(struct afs_operation *op)
1938{
1939 struct afs_vnode_param *dvp = &op->file[0];
1940 struct afs_vnode_param *vp = &op->file[1];
1941 struct afs_call *call;
1942 __be32 *bp;
1943 int i;
1944
1945 if (test_bit(AFS_SERVER_FL_NO_IBULK, &op->server->flags)) {
1946 afs_op_set_error(op, -ENOTSUPP);
1947 return;
1948 }
1949
1950 _enter(",%x,{%llx:%llu},%u",
1951 key_serial(op->key), vp->fid.vid, vp->fid.vnode, op->nr_files);
1952
1953 call = afs_alloc_flat_call(op->net, &afs_RXFSInlineBulkStatus,
1954 (2 + op->nr_files * 3) * 4,
1955 21 * 4);
1956 if (!call)
1957 return afs_op_nomem(op);
1958
1959 /* marshall the parameters */
1960 bp = call->request;
1961 *bp++ = htonl(FSINLINEBULKSTATUS);
1962 *bp++ = htonl(op->nr_files);
1963 *bp++ = htonl(dvp->fid.vid);
1964 *bp++ = htonl(dvp->fid.vnode);
1965 *bp++ = htonl(dvp->fid.unique);
1966 *bp++ = htonl(vp->fid.vid);
1967 *bp++ = htonl(vp->fid.vnode);
1968 *bp++ = htonl(vp->fid.unique);
1969 for (i = 0; i < op->nr_files - 2; i++) {
1970 *bp++ = htonl(op->more_files[i].fid.vid);
1971 *bp++ = htonl(op->more_files[i].fid.vnode);
1972 *bp++ = htonl(op->more_files[i].fid.unique);
1973 }
1974
1975 call->fid = vp->fid;
1976 trace_afs_make_fs_call(call, &vp->fid);
1977 afs_make_op_call(op, call, GFP_NOFS);
1978}
1979
1980/*
1981 * deliver reply data to an FS.FetchACL
1982 */
1983static int afs_deliver_fs_fetch_acl(struct afs_call *call)
1984{
1985 struct afs_operation *op = call->op;
1986 struct afs_vnode_param *vp = &op->file[0];
1987 struct afs_acl *acl;
1988 const __be32 *bp;
1989 unsigned int size;
1990 int ret;
1991
1992 _enter("{%u}", call->unmarshall);
1993
1994 switch (call->unmarshall) {
1995 case 0:
1996 afs_extract_to_tmp(call);
1997 call->unmarshall++;
1998 fallthrough;
1999
2000 /* extract the returned data length */
2001 case 1:
2002 ret = afs_extract_data(call, true);
2003 if (ret < 0)
2004 return ret;
2005
2006 size = call->count2 = ntohl(call->tmp);
2007 size = round_up(size, 4);
2008
2009 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
2010 if (!acl)
2011 return -ENOMEM;
2012 op->acl = acl;
2013 acl->size = call->count2;
2014 afs_extract_begin(call, acl->data, size);
2015 call->unmarshall++;
2016 fallthrough;
2017
2018 /* extract the returned data */
2019 case 2:
2020 ret = afs_extract_data(call, true);
2021 if (ret < 0)
2022 return ret;
2023
2024 afs_extract_to_buf(call, (21 + 6) * 4);
2025 call->unmarshall++;
2026 fallthrough;
2027
2028 /* extract the metadata */
2029 case 3:
2030 ret = afs_extract_data(call, false);
2031 if (ret < 0)
2032 return ret;
2033
2034 bp = call->buffer;
2035 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
2036 xdr_decode_AFSVolSync(&bp, &op->volsync);
2037
2038 call->unmarshall++;
2039 fallthrough;
2040
2041 case 4:
2042 break;
2043 }
2044
2045 _leave(" = 0 [done]");
2046 return 0;
2047}
2048
2049/*
2050 * FS.FetchACL operation type
2051 */
2052static const struct afs_call_type afs_RXFSFetchACL = {
2053 .name = "FS.FetchACL",
2054 .op = afs_FS_FetchACL,
2055 .deliver = afs_deliver_fs_fetch_acl,
2056};
2057
2058/*
2059 * Fetch the ACL for a file.
2060 */
2061void afs_fs_fetch_acl(struct afs_operation *op)
2062{
2063 struct afs_vnode_param *vp = &op->file[0];
2064 struct afs_call *call;
2065 __be32 *bp;
2066
2067 _enter(",%x,{%llx:%llu},,",
2068 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
2069
2070 call = afs_alloc_flat_call(op->net, &afs_RXFSFetchACL, 16, (21 + 6) * 4);
2071 if (!call)
2072 return afs_op_nomem(op);
2073
2074 /* marshall the parameters */
2075 bp = call->request;
2076 bp[0] = htonl(FSFETCHACL);
2077 bp[1] = htonl(vp->fid.vid);
2078 bp[2] = htonl(vp->fid.vnode);
2079 bp[3] = htonl(vp->fid.unique);
2080
2081 call->fid = vp->fid;
2082 trace_afs_make_fs_call(call, &vp->fid);
2083 afs_make_op_call(op, call, GFP_KERNEL);
2084}
2085
2086/*
2087 * FS.StoreACL operation type
2088 */
2089static const struct afs_call_type afs_RXFSStoreACL = {
2090 .name = "FS.StoreACL",
2091 .op = afs_FS_StoreACL,
2092 .deliver = afs_deliver_fs_file_status_and_vol,
2093 .destructor = afs_flat_call_destructor,
2094};
2095
2096/*
2097 * Fetch the ACL for a file.
2098 */
2099void afs_fs_store_acl(struct afs_operation *op)
2100{
2101 struct afs_vnode_param *vp = &op->file[0];
2102 struct afs_call *call;
2103 const struct afs_acl *acl = op->acl;
2104 size_t size;
2105 __be32 *bp;
2106
2107 _enter(",%x,{%llx:%llu},,",
2108 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
2109
2110 size = round_up(acl->size, 4);
2111 call = afs_alloc_flat_call(op->net, &afs_RXFSStoreACL,
2112 5 * 4 + size, (21 + 6) * 4);
2113 if (!call)
2114 return afs_op_nomem(op);
2115
2116 /* marshall the parameters */
2117 bp = call->request;
2118 bp[0] = htonl(FSSTOREACL);
2119 bp[1] = htonl(vp->fid.vid);
2120 bp[2] = htonl(vp->fid.vnode);
2121 bp[3] = htonl(vp->fid.unique);
2122 bp[4] = htonl(acl->size);
2123 memcpy(&bp[5], acl->data, acl->size);
2124 if (acl->size != size)
2125 memset((void *)&bp[5] + acl->size, 0, size - acl->size);
2126
2127 call->fid = vp->fid;
2128 trace_afs_make_fs_call(call, &vp->fid);
2129 afs_make_op_call(op, call, GFP_KERNEL);
2130}
1/* AFS File Server client stubs
2 *
3 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12#include <linux/init.h>
13#include <linux/slab.h>
14#include <linux/sched.h>
15#include <linux/circ_buf.h>
16#include <linux/iversion.h>
17#include "internal.h"
18#include "afs_fs.h"
19#include "xdr_fs.h"
20
21static const struct afs_fid afs_zero_fid;
22
23/*
24 * We need somewhere to discard into in case the server helpfully returns more
25 * than we asked for in FS.FetchData{,64}.
26 */
27static u8 afs_discard_buffer[64];
28
29static inline void afs_use_fs_server(struct afs_call *call, struct afs_cb_interest *cbi)
30{
31 call->cbi = afs_get_cb_interest(cbi);
32}
33
34/*
35 * decode an AFSFid block
36 */
37static void xdr_decode_AFSFid(const __be32 **_bp, struct afs_fid *fid)
38{
39 const __be32 *bp = *_bp;
40
41 fid->vid = ntohl(*bp++);
42 fid->vnode = ntohl(*bp++);
43 fid->unique = ntohl(*bp++);
44 *_bp = bp;
45}
46
47/*
48 * Dump a bad file status record.
49 */
50static void xdr_dump_bad(const __be32 *bp)
51{
52 __be32 x[4];
53 int i;
54
55 pr_notice("AFS XDR: Bad status record\n");
56 for (i = 0; i < 5 * 4 * 4; i += 16) {
57 memcpy(x, bp, 16);
58 bp += 4;
59 pr_notice("%03x: %08x %08x %08x %08x\n",
60 i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
61 }
62
63 memcpy(x, bp, 4);
64 pr_notice("0x50: %08x\n", ntohl(x[0]));
65}
66
67/*
68 * Update the core inode struct from a returned status record.
69 */
70void afs_update_inode_from_status(struct afs_vnode *vnode,
71 struct afs_file_status *status,
72 const afs_dataversion_t *expected_version,
73 u8 flags)
74{
75 struct timespec t;
76 umode_t mode;
77
78 t.tv_sec = status->mtime_client;
79 t.tv_nsec = 0;
80 vnode->vfs_inode.i_ctime = t;
81 vnode->vfs_inode.i_mtime = t;
82 vnode->vfs_inode.i_atime = t;
83
84 if (flags & (AFS_VNODE_META_CHANGED | AFS_VNODE_NOT_YET_SET)) {
85 vnode->vfs_inode.i_uid = make_kuid(&init_user_ns, status->owner);
86 vnode->vfs_inode.i_gid = make_kgid(&init_user_ns, status->group);
87 set_nlink(&vnode->vfs_inode, status->nlink);
88
89 mode = vnode->vfs_inode.i_mode;
90 mode &= ~S_IALLUGO;
91 mode |= status->mode;
92 barrier();
93 vnode->vfs_inode.i_mode = mode;
94 }
95
96 if (!(flags & AFS_VNODE_NOT_YET_SET)) {
97 if (expected_version &&
98 *expected_version != status->data_version) {
99 _debug("vnode modified %llx on {%x:%u} [exp %llx]",
100 (unsigned long long) status->data_version,
101 vnode->fid.vid, vnode->fid.vnode,
102 (unsigned long long) *expected_version);
103 vnode->invalid_before = status->data_version;
104 if (vnode->status.type == AFS_FTYPE_DIR) {
105 if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &vnode->flags))
106 afs_stat_v(vnode, n_inval);
107 } else {
108 set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags);
109 }
110 } else if (vnode->status.type == AFS_FTYPE_DIR) {
111 /* Expected directory change is handled elsewhere so
112 * that we can locally edit the directory and save on a
113 * download.
114 */
115 if (test_bit(AFS_VNODE_DIR_VALID, &vnode->flags))
116 flags &= ~AFS_VNODE_DATA_CHANGED;
117 }
118 }
119
120 if (flags & (AFS_VNODE_DATA_CHANGED | AFS_VNODE_NOT_YET_SET)) {
121 inode_set_iversion_raw(&vnode->vfs_inode, status->data_version);
122 i_size_write(&vnode->vfs_inode, status->size);
123 }
124}
125
126/*
127 * decode an AFSFetchStatus block
128 */
129static int xdr_decode_AFSFetchStatus(struct afs_call *call,
130 const __be32 **_bp,
131 struct afs_file_status *status,
132 struct afs_vnode *vnode,
133 const afs_dataversion_t *expected_version,
134 struct afs_read *read_req)
135{
136 const struct afs_xdr_AFSFetchStatus *xdr = (const void *)*_bp;
137 bool inline_error = (call->operation_ID == afs_FS_InlineBulkStatus);
138 u64 data_version, size;
139 u32 type, abort_code;
140 u8 flags = 0;
141 int ret;
142
143 if (vnode)
144 write_seqlock(&vnode->cb_lock);
145
146 abort_code = ntohl(xdr->abort_code);
147
148 if (xdr->if_version != htonl(AFS_FSTATUS_VERSION)) {
149 if (xdr->if_version == htonl(0) &&
150 abort_code != 0 &&
151 inline_error) {
152 /* The OpenAFS fileserver has a bug in FS.InlineBulkStatus
153 * whereby it doesn't set the interface version in the error
154 * case.
155 */
156 status->abort_code = abort_code;
157 ret = 0;
158 goto out;
159 }
160
161 pr_warn("Unknown AFSFetchStatus version %u\n", ntohl(xdr->if_version));
162 goto bad;
163 }
164
165 if (abort_code != 0 && inline_error) {
166 status->abort_code = abort_code;
167 ret = 0;
168 goto out;
169 }
170
171 type = ntohl(xdr->type);
172 switch (type) {
173 case AFS_FTYPE_FILE:
174 case AFS_FTYPE_DIR:
175 case AFS_FTYPE_SYMLINK:
176 if (type != status->type &&
177 vnode &&
178 !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
179 pr_warning("Vnode %x:%x:%x changed type %u to %u\n",
180 vnode->fid.vid,
181 vnode->fid.vnode,
182 vnode->fid.unique,
183 status->type, type);
184 goto bad;
185 }
186 status->type = type;
187 break;
188 default:
189 goto bad;
190 }
191
192#define EXTRACT_M(FIELD) \
193 do { \
194 u32 x = ntohl(xdr->FIELD); \
195 if (status->FIELD != x) { \
196 flags |= AFS_VNODE_META_CHANGED; \
197 status->FIELD = x; \
198 } \
199 } while (0)
200
201 EXTRACT_M(nlink);
202 EXTRACT_M(author);
203 EXTRACT_M(owner);
204 EXTRACT_M(caller_access); /* call ticket dependent */
205 EXTRACT_M(anon_access);
206 EXTRACT_M(mode);
207 EXTRACT_M(group);
208
209 status->mtime_client = ntohl(xdr->mtime_client);
210 status->mtime_server = ntohl(xdr->mtime_server);
211 status->lock_count = ntohl(xdr->lock_count);
212
213 size = (u64)ntohl(xdr->size_lo);
214 size |= (u64)ntohl(xdr->size_hi) << 32;
215 status->size = size;
216
217 data_version = (u64)ntohl(xdr->data_version_lo);
218 data_version |= (u64)ntohl(xdr->data_version_hi) << 32;
219 if (data_version != status->data_version) {
220 status->data_version = data_version;
221 flags |= AFS_VNODE_DATA_CHANGED;
222 }
223
224 if (read_req) {
225 read_req->data_version = data_version;
226 read_req->file_size = size;
227 }
228
229 *_bp = (const void *)*_bp + sizeof(*xdr);
230
231 if (vnode) {
232 if (test_bit(AFS_VNODE_UNSET, &vnode->flags))
233 flags |= AFS_VNODE_NOT_YET_SET;
234 afs_update_inode_from_status(vnode, status, expected_version,
235 flags);
236 }
237
238 ret = 0;
239
240out:
241 if (vnode)
242 write_sequnlock(&vnode->cb_lock);
243 return ret;
244
245bad:
246 xdr_dump_bad(*_bp);
247 ret = afs_protocol_error(call, -EBADMSG);
248 goto out;
249}
250
251/*
252 * decode an AFSCallBack block
253 */
254static void xdr_decode_AFSCallBack(struct afs_call *call,
255 struct afs_vnode *vnode,
256 const __be32 **_bp)
257{
258 struct afs_cb_interest *old, *cbi = call->cbi;
259 const __be32 *bp = *_bp;
260 u32 cb_expiry;
261
262 write_seqlock(&vnode->cb_lock);
263
264 if (call->cb_break == afs_cb_break_sum(vnode, cbi)) {
265 vnode->cb_version = ntohl(*bp++);
266 cb_expiry = ntohl(*bp++);
267 vnode->cb_type = ntohl(*bp++);
268 vnode->cb_expires_at = cb_expiry + ktime_get_real_seconds();
269 old = vnode->cb_interest;
270 if (old != call->cbi) {
271 vnode->cb_interest = cbi;
272 cbi = old;
273 }
274 set_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
275 } else {
276 bp += 3;
277 }
278
279 write_sequnlock(&vnode->cb_lock);
280 call->cbi = cbi;
281 *_bp = bp;
282}
283
284static void xdr_decode_AFSCallBack_raw(const __be32 **_bp,
285 struct afs_callback *cb)
286{
287 const __be32 *bp = *_bp;
288
289 cb->version = ntohl(*bp++);
290 cb->expiry = ntohl(*bp++);
291 cb->type = ntohl(*bp++);
292 *_bp = bp;
293}
294
295/*
296 * decode an AFSVolSync block
297 */
298static void xdr_decode_AFSVolSync(const __be32 **_bp,
299 struct afs_volsync *volsync)
300{
301 const __be32 *bp = *_bp;
302
303 volsync->creation = ntohl(*bp++);
304 bp++; /* spare2 */
305 bp++; /* spare3 */
306 bp++; /* spare4 */
307 bp++; /* spare5 */
308 bp++; /* spare6 */
309 *_bp = bp;
310}
311
312/*
313 * encode the requested attributes into an AFSStoreStatus block
314 */
315static void xdr_encode_AFS_StoreStatus(__be32 **_bp, struct iattr *attr)
316{
317 __be32 *bp = *_bp;
318 u32 mask = 0, mtime = 0, owner = 0, group = 0, mode = 0;
319
320 mask = 0;
321 if (attr->ia_valid & ATTR_MTIME) {
322 mask |= AFS_SET_MTIME;
323 mtime = attr->ia_mtime.tv_sec;
324 }
325
326 if (attr->ia_valid & ATTR_UID) {
327 mask |= AFS_SET_OWNER;
328 owner = from_kuid(&init_user_ns, attr->ia_uid);
329 }
330
331 if (attr->ia_valid & ATTR_GID) {
332 mask |= AFS_SET_GROUP;
333 group = from_kgid(&init_user_ns, attr->ia_gid);
334 }
335
336 if (attr->ia_valid & ATTR_MODE) {
337 mask |= AFS_SET_MODE;
338 mode = attr->ia_mode & S_IALLUGO;
339 }
340
341 *bp++ = htonl(mask);
342 *bp++ = htonl(mtime);
343 *bp++ = htonl(owner);
344 *bp++ = htonl(group);
345 *bp++ = htonl(mode);
346 *bp++ = 0; /* segment size */
347 *_bp = bp;
348}
349
350/*
351 * decode an AFSFetchVolumeStatus block
352 */
353static void xdr_decode_AFSFetchVolumeStatus(const __be32 **_bp,
354 struct afs_volume_status *vs)
355{
356 const __be32 *bp = *_bp;
357
358 vs->vid = ntohl(*bp++);
359 vs->parent_id = ntohl(*bp++);
360 vs->online = ntohl(*bp++);
361 vs->in_service = ntohl(*bp++);
362 vs->blessed = ntohl(*bp++);
363 vs->needs_salvage = ntohl(*bp++);
364 vs->type = ntohl(*bp++);
365 vs->min_quota = ntohl(*bp++);
366 vs->max_quota = ntohl(*bp++);
367 vs->blocks_in_use = ntohl(*bp++);
368 vs->part_blocks_avail = ntohl(*bp++);
369 vs->part_max_blocks = ntohl(*bp++);
370 *_bp = bp;
371}
372
373/*
374 * deliver reply data to an FS.FetchStatus
375 */
376static int afs_deliver_fs_fetch_status_vnode(struct afs_call *call)
377{
378 struct afs_vnode *vnode = call->reply[0];
379 const __be32 *bp;
380 int ret;
381
382 ret = afs_transfer_reply(call);
383 if (ret < 0)
384 return ret;
385
386 _enter("{%x:%u}", vnode->fid.vid, vnode->fid.vnode);
387
388 /* unmarshall the reply once we've received all of it */
389 bp = call->buffer;
390 if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
391 &call->expected_version, NULL) < 0)
392 return afs_protocol_error(call, -EBADMSG);
393 xdr_decode_AFSCallBack(call, vnode, &bp);
394 if (call->reply[1])
395 xdr_decode_AFSVolSync(&bp, call->reply[1]);
396
397 _leave(" = 0 [done]");
398 return 0;
399}
400
401/*
402 * FS.FetchStatus operation type
403 */
404static const struct afs_call_type afs_RXFSFetchStatus_vnode = {
405 .name = "FS.FetchStatus(vnode)",
406 .op = afs_FS_FetchStatus,
407 .deliver = afs_deliver_fs_fetch_status_vnode,
408 .destructor = afs_flat_call_destructor,
409};
410
411/*
412 * fetch the status information for a file
413 */
414int afs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_volsync *volsync,
415 bool new_inode)
416{
417 struct afs_vnode *vnode = fc->vnode;
418 struct afs_call *call;
419 struct afs_net *net = afs_v2net(vnode);
420 __be32 *bp;
421
422 _enter(",%x,{%x:%u},,",
423 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
424
425 call = afs_alloc_flat_call(net, &afs_RXFSFetchStatus_vnode,
426 16, (21 + 3 + 6) * 4);
427 if (!call) {
428 fc->ac.error = -ENOMEM;
429 return -ENOMEM;
430 }
431
432 call->key = fc->key;
433 call->reply[0] = vnode;
434 call->reply[1] = volsync;
435 call->expected_version = new_inode ? 1 : vnode->status.data_version;
436
437 /* marshall the parameters */
438 bp = call->request;
439 bp[0] = htonl(FSFETCHSTATUS);
440 bp[1] = htonl(vnode->fid.vid);
441 bp[2] = htonl(vnode->fid.vnode);
442 bp[3] = htonl(vnode->fid.unique);
443
444 call->cb_break = fc->cb_break;
445 afs_use_fs_server(call, fc->cbi);
446 trace_afs_make_fs_call(call, &vnode->fid);
447 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
448}
449
450/*
451 * deliver reply data to an FS.FetchData
452 */
453static int afs_deliver_fs_fetch_data(struct afs_call *call)
454{
455 struct afs_vnode *vnode = call->reply[0];
456 struct afs_read *req = call->reply[2];
457 const __be32 *bp;
458 unsigned int size;
459 void *buffer;
460 int ret;
461
462 _enter("{%u,%zu/%u;%llu/%llu}",
463 call->unmarshall, call->offset, call->count,
464 req->remain, req->actual_len);
465
466 switch (call->unmarshall) {
467 case 0:
468 req->actual_len = 0;
469 call->offset = 0;
470 call->unmarshall++;
471 if (call->operation_ID != FSFETCHDATA64) {
472 call->unmarshall++;
473 goto no_msw;
474 }
475
476 /* extract the upper part of the returned data length of an
477 * FSFETCHDATA64 op (which should always be 0 using this
478 * client) */
479 case 1:
480 _debug("extract data length (MSW)");
481 ret = afs_extract_data(call, &call->tmp, 4, true);
482 if (ret < 0)
483 return ret;
484
485 req->actual_len = ntohl(call->tmp);
486 req->actual_len <<= 32;
487 call->offset = 0;
488 call->unmarshall++;
489
490 no_msw:
491 /* extract the returned data length */
492 case 2:
493 _debug("extract data length");
494 ret = afs_extract_data(call, &call->tmp, 4, true);
495 if (ret < 0)
496 return ret;
497
498 req->actual_len |= ntohl(call->tmp);
499 _debug("DATA length: %llu", req->actual_len);
500
501 req->remain = req->actual_len;
502 call->offset = req->pos & (PAGE_SIZE - 1);
503 req->index = 0;
504 if (req->actual_len == 0)
505 goto no_more_data;
506 call->unmarshall++;
507
508 begin_page:
509 ASSERTCMP(req->index, <, req->nr_pages);
510 if (req->remain > PAGE_SIZE - call->offset)
511 size = PAGE_SIZE - call->offset;
512 else
513 size = req->remain;
514 call->count = call->offset + size;
515 ASSERTCMP(call->count, <=, PAGE_SIZE);
516 req->remain -= size;
517
518 /* extract the returned data */
519 case 3:
520 _debug("extract data %llu/%llu %zu/%u",
521 req->remain, req->actual_len, call->offset, call->count);
522
523 buffer = kmap(req->pages[req->index]);
524 ret = afs_extract_data(call, buffer, call->count, true);
525 kunmap(req->pages[req->index]);
526 if (ret < 0)
527 return ret;
528 if (call->offset == PAGE_SIZE) {
529 if (req->page_done)
530 req->page_done(call, req);
531 req->index++;
532 if (req->remain > 0) {
533 call->offset = 0;
534 if (req->index >= req->nr_pages) {
535 call->unmarshall = 4;
536 goto begin_discard;
537 }
538 goto begin_page;
539 }
540 }
541 goto no_more_data;
542
543 /* Discard any excess data the server gave us */
544 begin_discard:
545 case 4:
546 size = min_t(loff_t, sizeof(afs_discard_buffer), req->remain);
547 call->count = size;
548 _debug("extract discard %llu/%llu %zu/%u",
549 req->remain, req->actual_len, call->offset, call->count);
550
551 call->offset = 0;
552 ret = afs_extract_data(call, afs_discard_buffer, call->count, true);
553 req->remain -= call->offset;
554 if (ret < 0)
555 return ret;
556 if (req->remain > 0)
557 goto begin_discard;
558
559 no_more_data:
560 call->offset = 0;
561 call->unmarshall = 5;
562
563 /* extract the metadata */
564 case 5:
565 ret = afs_extract_data(call, call->buffer,
566 (21 + 3 + 6) * 4, false);
567 if (ret < 0)
568 return ret;
569
570 bp = call->buffer;
571 if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
572 &vnode->status.data_version, req) < 0)
573 return afs_protocol_error(call, -EBADMSG);
574 xdr_decode_AFSCallBack(call, vnode, &bp);
575 if (call->reply[1])
576 xdr_decode_AFSVolSync(&bp, call->reply[1]);
577
578 call->offset = 0;
579 call->unmarshall++;
580
581 case 6:
582 break;
583 }
584
585 for (; req->index < req->nr_pages; req->index++) {
586 if (call->count < PAGE_SIZE)
587 zero_user_segment(req->pages[req->index],
588 call->count, PAGE_SIZE);
589 if (req->page_done)
590 req->page_done(call, req);
591 call->count = 0;
592 }
593
594 _leave(" = 0 [done]");
595 return 0;
596}
597
598static void afs_fetch_data_destructor(struct afs_call *call)
599{
600 struct afs_read *req = call->reply[2];
601
602 afs_put_read(req);
603 afs_flat_call_destructor(call);
604}
605
606/*
607 * FS.FetchData operation type
608 */
609static const struct afs_call_type afs_RXFSFetchData = {
610 .name = "FS.FetchData",
611 .op = afs_FS_FetchData,
612 .deliver = afs_deliver_fs_fetch_data,
613 .destructor = afs_fetch_data_destructor,
614};
615
616static const struct afs_call_type afs_RXFSFetchData64 = {
617 .name = "FS.FetchData64",
618 .op = afs_FS_FetchData64,
619 .deliver = afs_deliver_fs_fetch_data,
620 .destructor = afs_fetch_data_destructor,
621};
622
623/*
624 * fetch data from a very large file
625 */
626static int afs_fs_fetch_data64(struct afs_fs_cursor *fc, struct afs_read *req)
627{
628 struct afs_vnode *vnode = fc->vnode;
629 struct afs_call *call;
630 struct afs_net *net = afs_v2net(vnode);
631 __be32 *bp;
632
633 _enter("");
634
635 call = afs_alloc_flat_call(net, &afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4);
636 if (!call)
637 return -ENOMEM;
638
639 call->key = fc->key;
640 call->reply[0] = vnode;
641 call->reply[1] = NULL; /* volsync */
642 call->reply[2] = req;
643 call->expected_version = vnode->status.data_version;
644
645 /* marshall the parameters */
646 bp = call->request;
647 bp[0] = htonl(FSFETCHDATA64);
648 bp[1] = htonl(vnode->fid.vid);
649 bp[2] = htonl(vnode->fid.vnode);
650 bp[3] = htonl(vnode->fid.unique);
651 bp[4] = htonl(upper_32_bits(req->pos));
652 bp[5] = htonl(lower_32_bits(req->pos));
653 bp[6] = 0;
654 bp[7] = htonl(lower_32_bits(req->len));
655
656 refcount_inc(&req->usage);
657 call->cb_break = fc->cb_break;
658 afs_use_fs_server(call, fc->cbi);
659 trace_afs_make_fs_call(call, &vnode->fid);
660 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
661}
662
663/*
664 * fetch data from a file
665 */
666int afs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_read *req)
667{
668 struct afs_vnode *vnode = fc->vnode;
669 struct afs_call *call;
670 struct afs_net *net = afs_v2net(vnode);
671 __be32 *bp;
672
673 if (upper_32_bits(req->pos) ||
674 upper_32_bits(req->len) ||
675 upper_32_bits(req->pos + req->len))
676 return afs_fs_fetch_data64(fc, req);
677
678 _enter("");
679
680 call = afs_alloc_flat_call(net, &afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
681 if (!call)
682 return -ENOMEM;
683
684 call->key = fc->key;
685 call->reply[0] = vnode;
686 call->reply[1] = NULL; /* volsync */
687 call->reply[2] = req;
688 call->expected_version = vnode->status.data_version;
689
690 /* marshall the parameters */
691 bp = call->request;
692 bp[0] = htonl(FSFETCHDATA);
693 bp[1] = htonl(vnode->fid.vid);
694 bp[2] = htonl(vnode->fid.vnode);
695 bp[3] = htonl(vnode->fid.unique);
696 bp[4] = htonl(lower_32_bits(req->pos));
697 bp[5] = htonl(lower_32_bits(req->len));
698
699 refcount_inc(&req->usage);
700 call->cb_break = fc->cb_break;
701 afs_use_fs_server(call, fc->cbi);
702 trace_afs_make_fs_call(call, &vnode->fid);
703 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
704}
705
706/*
707 * deliver reply data to an FS.CreateFile or an FS.MakeDir
708 */
709static int afs_deliver_fs_create_vnode(struct afs_call *call)
710{
711 struct afs_vnode *vnode = call->reply[0];
712 const __be32 *bp;
713 int ret;
714
715 _enter("{%u}", call->unmarshall);
716
717 ret = afs_transfer_reply(call);
718 if (ret < 0)
719 return ret;
720
721 /* unmarshall the reply once we've received all of it */
722 bp = call->buffer;
723 xdr_decode_AFSFid(&bp, call->reply[1]);
724 if (xdr_decode_AFSFetchStatus(call, &bp, call->reply[2], NULL, NULL, NULL) < 0 ||
725 xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
726 &call->expected_version, NULL) < 0)
727 return afs_protocol_error(call, -EBADMSG);
728 xdr_decode_AFSCallBack_raw(&bp, call->reply[3]);
729 /* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
730
731 _leave(" = 0 [done]");
732 return 0;
733}
734
735/*
736 * FS.CreateFile and FS.MakeDir operation type
737 */
738static const struct afs_call_type afs_RXFSCreateFile = {
739 .name = "FS.CreateFile",
740 .op = afs_FS_CreateFile,
741 .deliver = afs_deliver_fs_create_vnode,
742 .destructor = afs_flat_call_destructor,
743};
744
745static const struct afs_call_type afs_RXFSMakeDir = {
746 .name = "FS.MakeDir",
747 .op = afs_FS_MakeDir,
748 .deliver = afs_deliver_fs_create_vnode,
749 .destructor = afs_flat_call_destructor,
750};
751
752/*
753 * create a file or make a directory
754 */
755int afs_fs_create(struct afs_fs_cursor *fc,
756 const char *name,
757 umode_t mode,
758 u64 current_data_version,
759 struct afs_fid *newfid,
760 struct afs_file_status *newstatus,
761 struct afs_callback *newcb)
762{
763 struct afs_vnode *vnode = fc->vnode;
764 struct afs_call *call;
765 struct afs_net *net = afs_v2net(vnode);
766 size_t namesz, reqsz, padsz;
767 __be32 *bp;
768
769 _enter("");
770
771 namesz = strlen(name);
772 padsz = (4 - (namesz & 3)) & 3;
773 reqsz = (5 * 4) + namesz + padsz + (6 * 4);
774
775 call = afs_alloc_flat_call(
776 net, S_ISDIR(mode) ? &afs_RXFSMakeDir : &afs_RXFSCreateFile,
777 reqsz, (3 + 21 + 21 + 3 + 6) * 4);
778 if (!call)
779 return -ENOMEM;
780
781 call->key = fc->key;
782 call->reply[0] = vnode;
783 call->reply[1] = newfid;
784 call->reply[2] = newstatus;
785 call->reply[3] = newcb;
786 call->expected_version = current_data_version + 1;
787
788 /* marshall the parameters */
789 bp = call->request;
790 *bp++ = htonl(S_ISDIR(mode) ? FSMAKEDIR : FSCREATEFILE);
791 *bp++ = htonl(vnode->fid.vid);
792 *bp++ = htonl(vnode->fid.vnode);
793 *bp++ = htonl(vnode->fid.unique);
794 *bp++ = htonl(namesz);
795 memcpy(bp, name, namesz);
796 bp = (void *) bp + namesz;
797 if (padsz > 0) {
798 memset(bp, 0, padsz);
799 bp = (void *) bp + padsz;
800 }
801 *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
802 *bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
803 *bp++ = 0; /* owner */
804 *bp++ = 0; /* group */
805 *bp++ = htonl(mode & S_IALLUGO); /* unix mode */
806 *bp++ = 0; /* segment size */
807
808 afs_use_fs_server(call, fc->cbi);
809 trace_afs_make_fs_call(call, &vnode->fid);
810 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
811}
812
813/*
814 * deliver reply data to an FS.RemoveFile or FS.RemoveDir
815 */
816static int afs_deliver_fs_remove(struct afs_call *call)
817{
818 struct afs_vnode *vnode = call->reply[0];
819 const __be32 *bp;
820 int ret;
821
822 _enter("{%u}", call->unmarshall);
823
824 ret = afs_transfer_reply(call);
825 if (ret < 0)
826 return ret;
827
828 /* unmarshall the reply once we've received all of it */
829 bp = call->buffer;
830 if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
831 &call->expected_version, NULL) < 0)
832 return afs_protocol_error(call, -EBADMSG);
833 /* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
834
835 _leave(" = 0 [done]");
836 return 0;
837}
838
839/*
840 * FS.RemoveDir/FS.RemoveFile operation type
841 */
842static const struct afs_call_type afs_RXFSRemoveFile = {
843 .name = "FS.RemoveFile",
844 .op = afs_FS_RemoveFile,
845 .deliver = afs_deliver_fs_remove,
846 .destructor = afs_flat_call_destructor,
847};
848
849static const struct afs_call_type afs_RXFSRemoveDir = {
850 .name = "FS.RemoveDir",
851 .op = afs_FS_RemoveDir,
852 .deliver = afs_deliver_fs_remove,
853 .destructor = afs_flat_call_destructor,
854};
855
856/*
857 * remove a file or directory
858 */
859int afs_fs_remove(struct afs_fs_cursor *fc, const char *name, bool isdir,
860 u64 current_data_version)
861{
862 struct afs_vnode *vnode = fc->vnode;
863 struct afs_call *call;
864 struct afs_net *net = afs_v2net(vnode);
865 size_t namesz, reqsz, padsz;
866 __be32 *bp;
867
868 _enter("");
869
870 namesz = strlen(name);
871 padsz = (4 - (namesz & 3)) & 3;
872 reqsz = (5 * 4) + namesz + padsz;
873
874 call = afs_alloc_flat_call(
875 net, isdir ? &afs_RXFSRemoveDir : &afs_RXFSRemoveFile,
876 reqsz, (21 + 6) * 4);
877 if (!call)
878 return -ENOMEM;
879
880 call->key = fc->key;
881 call->reply[0] = vnode;
882 call->expected_version = current_data_version + 1;
883
884 /* marshall the parameters */
885 bp = call->request;
886 *bp++ = htonl(isdir ? FSREMOVEDIR : FSREMOVEFILE);
887 *bp++ = htonl(vnode->fid.vid);
888 *bp++ = htonl(vnode->fid.vnode);
889 *bp++ = htonl(vnode->fid.unique);
890 *bp++ = htonl(namesz);
891 memcpy(bp, name, namesz);
892 bp = (void *) bp + namesz;
893 if (padsz > 0) {
894 memset(bp, 0, padsz);
895 bp = (void *) bp + padsz;
896 }
897
898 afs_use_fs_server(call, fc->cbi);
899 trace_afs_make_fs_call(call, &vnode->fid);
900 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
901}
902
903/*
904 * deliver reply data to an FS.Link
905 */
906static int afs_deliver_fs_link(struct afs_call *call)
907{
908 struct afs_vnode *dvnode = call->reply[0], *vnode = call->reply[1];
909 const __be32 *bp;
910 int ret;
911
912 _enter("{%u}", call->unmarshall);
913
914 ret = afs_transfer_reply(call);
915 if (ret < 0)
916 return ret;
917
918 /* unmarshall the reply once we've received all of it */
919 bp = call->buffer;
920 if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode, NULL, NULL) < 0 ||
921 xdr_decode_AFSFetchStatus(call, &bp, &dvnode->status, dvnode,
922 &call->expected_version, NULL) < 0)
923 return afs_protocol_error(call, -EBADMSG);
924 /* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
925
926 _leave(" = 0 [done]");
927 return 0;
928}
929
930/*
931 * FS.Link operation type
932 */
933static const struct afs_call_type afs_RXFSLink = {
934 .name = "FS.Link",
935 .op = afs_FS_Link,
936 .deliver = afs_deliver_fs_link,
937 .destructor = afs_flat_call_destructor,
938};
939
940/*
941 * make a hard link
942 */
943int afs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
944 const char *name, u64 current_data_version)
945{
946 struct afs_vnode *dvnode = fc->vnode;
947 struct afs_call *call;
948 struct afs_net *net = afs_v2net(vnode);
949 size_t namesz, reqsz, padsz;
950 __be32 *bp;
951
952 _enter("");
953
954 namesz = strlen(name);
955 padsz = (4 - (namesz & 3)) & 3;
956 reqsz = (5 * 4) + namesz + padsz + (3 * 4);
957
958 call = afs_alloc_flat_call(net, &afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
959 if (!call)
960 return -ENOMEM;
961
962 call->key = fc->key;
963 call->reply[0] = dvnode;
964 call->reply[1] = vnode;
965 call->expected_version = current_data_version + 1;
966
967 /* marshall the parameters */
968 bp = call->request;
969 *bp++ = htonl(FSLINK);
970 *bp++ = htonl(dvnode->fid.vid);
971 *bp++ = htonl(dvnode->fid.vnode);
972 *bp++ = htonl(dvnode->fid.unique);
973 *bp++ = htonl(namesz);
974 memcpy(bp, name, namesz);
975 bp = (void *) bp + namesz;
976 if (padsz > 0) {
977 memset(bp, 0, padsz);
978 bp = (void *) bp + padsz;
979 }
980 *bp++ = htonl(vnode->fid.vid);
981 *bp++ = htonl(vnode->fid.vnode);
982 *bp++ = htonl(vnode->fid.unique);
983
984 afs_use_fs_server(call, fc->cbi);
985 trace_afs_make_fs_call(call, &vnode->fid);
986 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
987}
988
989/*
990 * deliver reply data to an FS.Symlink
991 */
992static int afs_deliver_fs_symlink(struct afs_call *call)
993{
994 struct afs_vnode *vnode = call->reply[0];
995 const __be32 *bp;
996 int ret;
997
998 _enter("{%u}", call->unmarshall);
999
1000 ret = afs_transfer_reply(call);
1001 if (ret < 0)
1002 return ret;
1003
1004 /* unmarshall the reply once we've received all of it */
1005 bp = call->buffer;
1006 xdr_decode_AFSFid(&bp, call->reply[1]);
1007 if (xdr_decode_AFSFetchStatus(call, &bp, call->reply[2], NULL, NULL, NULL) ||
1008 xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
1009 &call->expected_version, NULL) < 0)
1010 return afs_protocol_error(call, -EBADMSG);
1011 /* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
1012
1013 _leave(" = 0 [done]");
1014 return 0;
1015}
1016
1017/*
1018 * FS.Symlink operation type
1019 */
1020static const struct afs_call_type afs_RXFSSymlink = {
1021 .name = "FS.Symlink",
1022 .op = afs_FS_Symlink,
1023 .deliver = afs_deliver_fs_symlink,
1024 .destructor = afs_flat_call_destructor,
1025};
1026
1027/*
1028 * create a symbolic link
1029 */
1030int afs_fs_symlink(struct afs_fs_cursor *fc,
1031 const char *name,
1032 const char *contents,
1033 u64 current_data_version,
1034 struct afs_fid *newfid,
1035 struct afs_file_status *newstatus)
1036{
1037 struct afs_vnode *vnode = fc->vnode;
1038 struct afs_call *call;
1039 struct afs_net *net = afs_v2net(vnode);
1040 size_t namesz, reqsz, padsz, c_namesz, c_padsz;
1041 __be32 *bp;
1042
1043 _enter("");
1044
1045 namesz = strlen(name);
1046 padsz = (4 - (namesz & 3)) & 3;
1047
1048 c_namesz = strlen(contents);
1049 c_padsz = (4 - (c_namesz & 3)) & 3;
1050
1051 reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4);
1052
1053 call = afs_alloc_flat_call(net, &afs_RXFSSymlink, reqsz,
1054 (3 + 21 + 21 + 6) * 4);
1055 if (!call)
1056 return -ENOMEM;
1057
1058 call->key = fc->key;
1059 call->reply[0] = vnode;
1060 call->reply[1] = newfid;
1061 call->reply[2] = newstatus;
1062 call->expected_version = current_data_version + 1;
1063
1064 /* marshall the parameters */
1065 bp = call->request;
1066 *bp++ = htonl(FSSYMLINK);
1067 *bp++ = htonl(vnode->fid.vid);
1068 *bp++ = htonl(vnode->fid.vnode);
1069 *bp++ = htonl(vnode->fid.unique);
1070 *bp++ = htonl(namesz);
1071 memcpy(bp, name, namesz);
1072 bp = (void *) bp + namesz;
1073 if (padsz > 0) {
1074 memset(bp, 0, padsz);
1075 bp = (void *) bp + padsz;
1076 }
1077 *bp++ = htonl(c_namesz);
1078 memcpy(bp, contents, c_namesz);
1079 bp = (void *) bp + c_namesz;
1080 if (c_padsz > 0) {
1081 memset(bp, 0, c_padsz);
1082 bp = (void *) bp + c_padsz;
1083 }
1084 *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
1085 *bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
1086 *bp++ = 0; /* owner */
1087 *bp++ = 0; /* group */
1088 *bp++ = htonl(S_IRWXUGO); /* unix mode */
1089 *bp++ = 0; /* segment size */
1090
1091 afs_use_fs_server(call, fc->cbi);
1092 trace_afs_make_fs_call(call, &vnode->fid);
1093 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1094}
1095
1096/*
1097 * deliver reply data to an FS.Rename
1098 */
1099static int afs_deliver_fs_rename(struct afs_call *call)
1100{
1101 struct afs_vnode *orig_dvnode = call->reply[0], *new_dvnode = call->reply[1];
1102 const __be32 *bp;
1103 int ret;
1104
1105 _enter("{%u}", call->unmarshall);
1106
1107 ret = afs_transfer_reply(call);
1108 if (ret < 0)
1109 return ret;
1110
1111 /* unmarshall the reply once we've received all of it */
1112 bp = call->buffer;
1113 if (xdr_decode_AFSFetchStatus(call, &bp, &orig_dvnode->status, orig_dvnode,
1114 &call->expected_version, NULL) < 0)
1115 return afs_protocol_error(call, -EBADMSG);
1116 if (new_dvnode != orig_dvnode &&
1117 xdr_decode_AFSFetchStatus(call, &bp, &new_dvnode->status, new_dvnode,
1118 &call->expected_version_2, NULL) < 0)
1119 return afs_protocol_error(call, -EBADMSG);
1120 /* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
1121
1122 _leave(" = 0 [done]");
1123 return 0;
1124}
1125
1126/*
1127 * FS.Rename operation type
1128 */
1129static const struct afs_call_type afs_RXFSRename = {
1130 .name = "FS.Rename",
1131 .op = afs_FS_Rename,
1132 .deliver = afs_deliver_fs_rename,
1133 .destructor = afs_flat_call_destructor,
1134};
1135
1136/*
1137 * create a symbolic link
1138 */
1139int afs_fs_rename(struct afs_fs_cursor *fc,
1140 const char *orig_name,
1141 struct afs_vnode *new_dvnode,
1142 const char *new_name,
1143 u64 current_orig_data_version,
1144 u64 current_new_data_version)
1145{
1146 struct afs_vnode *orig_dvnode = fc->vnode;
1147 struct afs_call *call;
1148 struct afs_net *net = afs_v2net(orig_dvnode);
1149 size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz;
1150 __be32 *bp;
1151
1152 _enter("");
1153
1154 o_namesz = strlen(orig_name);
1155 o_padsz = (4 - (o_namesz & 3)) & 3;
1156
1157 n_namesz = strlen(new_name);
1158 n_padsz = (4 - (n_namesz & 3)) & 3;
1159
1160 reqsz = (4 * 4) +
1161 4 + o_namesz + o_padsz +
1162 (3 * 4) +
1163 4 + n_namesz + n_padsz;
1164
1165 call = afs_alloc_flat_call(net, &afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
1166 if (!call)
1167 return -ENOMEM;
1168
1169 call->key = fc->key;
1170 call->reply[0] = orig_dvnode;
1171 call->reply[1] = new_dvnode;
1172 call->expected_version = current_orig_data_version + 1;
1173 call->expected_version_2 = current_new_data_version + 1;
1174
1175 /* marshall the parameters */
1176 bp = call->request;
1177 *bp++ = htonl(FSRENAME);
1178 *bp++ = htonl(orig_dvnode->fid.vid);
1179 *bp++ = htonl(orig_dvnode->fid.vnode);
1180 *bp++ = htonl(orig_dvnode->fid.unique);
1181 *bp++ = htonl(o_namesz);
1182 memcpy(bp, orig_name, o_namesz);
1183 bp = (void *) bp + o_namesz;
1184 if (o_padsz > 0) {
1185 memset(bp, 0, o_padsz);
1186 bp = (void *) bp + o_padsz;
1187 }
1188
1189 *bp++ = htonl(new_dvnode->fid.vid);
1190 *bp++ = htonl(new_dvnode->fid.vnode);
1191 *bp++ = htonl(new_dvnode->fid.unique);
1192 *bp++ = htonl(n_namesz);
1193 memcpy(bp, new_name, n_namesz);
1194 bp = (void *) bp + n_namesz;
1195 if (n_padsz > 0) {
1196 memset(bp, 0, n_padsz);
1197 bp = (void *) bp + n_padsz;
1198 }
1199
1200 afs_use_fs_server(call, fc->cbi);
1201 trace_afs_make_fs_call(call, &orig_dvnode->fid);
1202 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1203}
1204
1205/*
1206 * deliver reply data to an FS.StoreData
1207 */
1208static int afs_deliver_fs_store_data(struct afs_call *call)
1209{
1210 struct afs_vnode *vnode = call->reply[0];
1211 const __be32 *bp;
1212 int ret;
1213
1214 _enter("");
1215
1216 ret = afs_transfer_reply(call);
1217 if (ret < 0)
1218 return ret;
1219
1220 /* unmarshall the reply once we've received all of it */
1221 bp = call->buffer;
1222 if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
1223 &call->expected_version, NULL) < 0)
1224 return afs_protocol_error(call, -EBADMSG);
1225 /* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
1226
1227 afs_pages_written_back(vnode, call);
1228
1229 _leave(" = 0 [done]");
1230 return 0;
1231}
1232
1233/*
1234 * FS.StoreData operation type
1235 */
1236static const struct afs_call_type afs_RXFSStoreData = {
1237 .name = "FS.StoreData",
1238 .op = afs_FS_StoreData,
1239 .deliver = afs_deliver_fs_store_data,
1240 .destructor = afs_flat_call_destructor,
1241};
1242
1243static const struct afs_call_type afs_RXFSStoreData64 = {
1244 .name = "FS.StoreData64",
1245 .op = afs_FS_StoreData64,
1246 .deliver = afs_deliver_fs_store_data,
1247 .destructor = afs_flat_call_destructor,
1248};
1249
1250/*
1251 * store a set of pages to a very large file
1252 */
1253static int afs_fs_store_data64(struct afs_fs_cursor *fc,
1254 struct address_space *mapping,
1255 pgoff_t first, pgoff_t last,
1256 unsigned offset, unsigned to,
1257 loff_t size, loff_t pos, loff_t i_size)
1258{
1259 struct afs_vnode *vnode = fc->vnode;
1260 struct afs_call *call;
1261 struct afs_net *net = afs_v2net(vnode);
1262 __be32 *bp;
1263
1264 _enter(",%x,{%x:%u},,",
1265 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1266
1267 call = afs_alloc_flat_call(net, &afs_RXFSStoreData64,
1268 (4 + 6 + 3 * 2) * 4,
1269 (21 + 6) * 4);
1270 if (!call)
1271 return -ENOMEM;
1272
1273 call->key = fc->key;
1274 call->mapping = mapping;
1275 call->reply[0] = vnode;
1276 call->first = first;
1277 call->last = last;
1278 call->first_offset = offset;
1279 call->last_to = to;
1280 call->send_pages = true;
1281 call->expected_version = vnode->status.data_version + 1;
1282
1283 /* marshall the parameters */
1284 bp = call->request;
1285 *bp++ = htonl(FSSTOREDATA64);
1286 *bp++ = htonl(vnode->fid.vid);
1287 *bp++ = htonl(vnode->fid.vnode);
1288 *bp++ = htonl(vnode->fid.unique);
1289
1290 *bp++ = htonl(AFS_SET_MTIME); /* mask */
1291 *bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
1292 *bp++ = 0; /* owner */
1293 *bp++ = 0; /* group */
1294 *bp++ = 0; /* unix mode */
1295 *bp++ = 0; /* segment size */
1296
1297 *bp++ = htonl(pos >> 32);
1298 *bp++ = htonl((u32) pos);
1299 *bp++ = htonl(size >> 32);
1300 *bp++ = htonl((u32) size);
1301 *bp++ = htonl(i_size >> 32);
1302 *bp++ = htonl((u32) i_size);
1303
1304 trace_afs_make_fs_call(call, &vnode->fid);
1305 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1306}
1307
1308/*
1309 * store a set of pages
1310 */
1311int afs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
1312 pgoff_t first, pgoff_t last,
1313 unsigned offset, unsigned to)
1314{
1315 struct afs_vnode *vnode = fc->vnode;
1316 struct afs_call *call;
1317 struct afs_net *net = afs_v2net(vnode);
1318 loff_t size, pos, i_size;
1319 __be32 *bp;
1320
1321 _enter(",%x,{%x:%u},,",
1322 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1323
1324 size = (loff_t)to - (loff_t)offset;
1325 if (first != last)
1326 size += (loff_t)(last - first) << PAGE_SHIFT;
1327 pos = (loff_t)first << PAGE_SHIFT;
1328 pos += offset;
1329
1330 i_size = i_size_read(&vnode->vfs_inode);
1331 if (pos + size > i_size)
1332 i_size = size + pos;
1333
1334 _debug("size %llx, at %llx, i_size %llx",
1335 (unsigned long long) size, (unsigned long long) pos,
1336 (unsigned long long) i_size);
1337
1338 if (pos >> 32 || i_size >> 32 || size >> 32 || (pos + size) >> 32)
1339 return afs_fs_store_data64(fc, mapping, first, last, offset, to,
1340 size, pos, i_size);
1341
1342 call = afs_alloc_flat_call(net, &afs_RXFSStoreData,
1343 (4 + 6 + 3) * 4,
1344 (21 + 6) * 4);
1345 if (!call)
1346 return -ENOMEM;
1347
1348 call->key = fc->key;
1349 call->mapping = mapping;
1350 call->reply[0] = vnode;
1351 call->first = first;
1352 call->last = last;
1353 call->first_offset = offset;
1354 call->last_to = to;
1355 call->send_pages = true;
1356 call->expected_version = vnode->status.data_version + 1;
1357
1358 /* marshall the parameters */
1359 bp = call->request;
1360 *bp++ = htonl(FSSTOREDATA);
1361 *bp++ = htonl(vnode->fid.vid);
1362 *bp++ = htonl(vnode->fid.vnode);
1363 *bp++ = htonl(vnode->fid.unique);
1364
1365 *bp++ = htonl(AFS_SET_MTIME); /* mask */
1366 *bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
1367 *bp++ = 0; /* owner */
1368 *bp++ = 0; /* group */
1369 *bp++ = 0; /* unix mode */
1370 *bp++ = 0; /* segment size */
1371
1372 *bp++ = htonl(pos);
1373 *bp++ = htonl(size);
1374 *bp++ = htonl(i_size);
1375
1376 afs_use_fs_server(call, fc->cbi);
1377 trace_afs_make_fs_call(call, &vnode->fid);
1378 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1379}
1380
1381/*
1382 * deliver reply data to an FS.StoreStatus
1383 */
1384static int afs_deliver_fs_store_status(struct afs_call *call)
1385{
1386 struct afs_vnode *vnode = call->reply[0];
1387 const __be32 *bp;
1388 int ret;
1389
1390 _enter("");
1391
1392 ret = afs_transfer_reply(call);
1393 if (ret < 0)
1394 return ret;
1395
1396 /* unmarshall the reply once we've received all of it */
1397 bp = call->buffer;
1398 if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
1399 &call->expected_version, NULL) < 0)
1400 return afs_protocol_error(call, -EBADMSG);
1401 /* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
1402
1403 _leave(" = 0 [done]");
1404 return 0;
1405}
1406
1407/*
1408 * FS.StoreStatus operation type
1409 */
1410static const struct afs_call_type afs_RXFSStoreStatus = {
1411 .name = "FS.StoreStatus",
1412 .op = afs_FS_StoreStatus,
1413 .deliver = afs_deliver_fs_store_status,
1414 .destructor = afs_flat_call_destructor,
1415};
1416
1417static const struct afs_call_type afs_RXFSStoreData_as_Status = {
1418 .name = "FS.StoreData",
1419 .op = afs_FS_StoreData,
1420 .deliver = afs_deliver_fs_store_status,
1421 .destructor = afs_flat_call_destructor,
1422};
1423
1424static const struct afs_call_type afs_RXFSStoreData64_as_Status = {
1425 .name = "FS.StoreData64",
1426 .op = afs_FS_StoreData64,
1427 .deliver = afs_deliver_fs_store_status,
1428 .destructor = afs_flat_call_destructor,
1429};
1430
1431/*
1432 * set the attributes on a very large file, using FS.StoreData rather than
1433 * FS.StoreStatus so as to alter the file size also
1434 */
1435static int afs_fs_setattr_size64(struct afs_fs_cursor *fc, struct iattr *attr)
1436{
1437 struct afs_vnode *vnode = fc->vnode;
1438 struct afs_call *call;
1439 struct afs_net *net = afs_v2net(vnode);
1440 __be32 *bp;
1441
1442 _enter(",%x,{%x:%u},,",
1443 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1444
1445 ASSERT(attr->ia_valid & ATTR_SIZE);
1446
1447 call = afs_alloc_flat_call(net, &afs_RXFSStoreData64_as_Status,
1448 (4 + 6 + 3 * 2) * 4,
1449 (21 + 6) * 4);
1450 if (!call)
1451 return -ENOMEM;
1452
1453 call->key = fc->key;
1454 call->reply[0] = vnode;
1455 call->expected_version = vnode->status.data_version + 1;
1456
1457 /* marshall the parameters */
1458 bp = call->request;
1459 *bp++ = htonl(FSSTOREDATA64);
1460 *bp++ = htonl(vnode->fid.vid);
1461 *bp++ = htonl(vnode->fid.vnode);
1462 *bp++ = htonl(vnode->fid.unique);
1463
1464 xdr_encode_AFS_StoreStatus(&bp, attr);
1465
1466 *bp++ = 0; /* position of start of write */
1467 *bp++ = 0;
1468 *bp++ = 0; /* size of write */
1469 *bp++ = 0;
1470 *bp++ = htonl(attr->ia_size >> 32); /* new file length */
1471 *bp++ = htonl((u32) attr->ia_size);
1472
1473 afs_use_fs_server(call, fc->cbi);
1474 trace_afs_make_fs_call(call, &vnode->fid);
1475 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1476}
1477
1478/*
1479 * set the attributes on a file, using FS.StoreData rather than FS.StoreStatus
1480 * so as to alter the file size also
1481 */
1482static int afs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr)
1483{
1484 struct afs_vnode *vnode = fc->vnode;
1485 struct afs_call *call;
1486 struct afs_net *net = afs_v2net(vnode);
1487 __be32 *bp;
1488
1489 _enter(",%x,{%x:%u},,",
1490 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1491
1492 ASSERT(attr->ia_valid & ATTR_SIZE);
1493 if (attr->ia_size >> 32)
1494 return afs_fs_setattr_size64(fc, attr);
1495
1496 call = afs_alloc_flat_call(net, &afs_RXFSStoreData_as_Status,
1497 (4 + 6 + 3) * 4,
1498 (21 + 6) * 4);
1499 if (!call)
1500 return -ENOMEM;
1501
1502 call->key = fc->key;
1503 call->reply[0] = vnode;
1504 call->expected_version = vnode->status.data_version + 1;
1505
1506 /* marshall the parameters */
1507 bp = call->request;
1508 *bp++ = htonl(FSSTOREDATA);
1509 *bp++ = htonl(vnode->fid.vid);
1510 *bp++ = htonl(vnode->fid.vnode);
1511 *bp++ = htonl(vnode->fid.unique);
1512
1513 xdr_encode_AFS_StoreStatus(&bp, attr);
1514
1515 *bp++ = 0; /* position of start of write */
1516 *bp++ = 0; /* size of write */
1517 *bp++ = htonl(attr->ia_size); /* new file length */
1518
1519 afs_use_fs_server(call, fc->cbi);
1520 trace_afs_make_fs_call(call, &vnode->fid);
1521 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1522}
1523
1524/*
1525 * set the attributes on a file, using FS.StoreData if there's a change in file
1526 * size, and FS.StoreStatus otherwise
1527 */
1528int afs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr)
1529{
1530 struct afs_vnode *vnode = fc->vnode;
1531 struct afs_call *call;
1532 struct afs_net *net = afs_v2net(vnode);
1533 __be32 *bp;
1534
1535 if (attr->ia_valid & ATTR_SIZE)
1536 return afs_fs_setattr_size(fc, attr);
1537
1538 _enter(",%x,{%x:%u},,",
1539 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1540
1541 call = afs_alloc_flat_call(net, &afs_RXFSStoreStatus,
1542 (4 + 6) * 4,
1543 (21 + 6) * 4);
1544 if (!call)
1545 return -ENOMEM;
1546
1547 call->key = fc->key;
1548 call->reply[0] = vnode;
1549 call->expected_version = vnode->status.data_version;
1550
1551 /* marshall the parameters */
1552 bp = call->request;
1553 *bp++ = htonl(FSSTORESTATUS);
1554 *bp++ = htonl(vnode->fid.vid);
1555 *bp++ = htonl(vnode->fid.vnode);
1556 *bp++ = htonl(vnode->fid.unique);
1557
1558 xdr_encode_AFS_StoreStatus(&bp, attr);
1559
1560 afs_use_fs_server(call, fc->cbi);
1561 trace_afs_make_fs_call(call, &vnode->fid);
1562 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1563}
1564
1565/*
1566 * deliver reply data to an FS.GetVolumeStatus
1567 */
1568static int afs_deliver_fs_get_volume_status(struct afs_call *call)
1569{
1570 const __be32 *bp;
1571 char *p;
1572 int ret;
1573
1574 _enter("{%u}", call->unmarshall);
1575
1576 switch (call->unmarshall) {
1577 case 0:
1578 call->offset = 0;
1579 call->unmarshall++;
1580
1581 /* extract the returned status record */
1582 case 1:
1583 _debug("extract status");
1584 ret = afs_extract_data(call, call->buffer,
1585 12 * 4, true);
1586 if (ret < 0)
1587 return ret;
1588
1589 bp = call->buffer;
1590 xdr_decode_AFSFetchVolumeStatus(&bp, call->reply[1]);
1591 call->offset = 0;
1592 call->unmarshall++;
1593
1594 /* extract the volume name length */
1595 case 2:
1596 ret = afs_extract_data(call, &call->tmp, 4, true);
1597 if (ret < 0)
1598 return ret;
1599
1600 call->count = ntohl(call->tmp);
1601 _debug("volname length: %u", call->count);
1602 if (call->count >= AFSNAMEMAX)
1603 return afs_protocol_error(call, -EBADMSG);
1604 call->offset = 0;
1605 call->unmarshall++;
1606
1607 /* extract the volume name */
1608 case 3:
1609 _debug("extract volname");
1610 if (call->count > 0) {
1611 ret = afs_extract_data(call, call->reply[2],
1612 call->count, true);
1613 if (ret < 0)
1614 return ret;
1615 }
1616
1617 p = call->reply[2];
1618 p[call->count] = 0;
1619 _debug("volname '%s'", p);
1620
1621 call->offset = 0;
1622 call->unmarshall++;
1623
1624 /* extract the volume name padding */
1625 if ((call->count & 3) == 0) {
1626 call->unmarshall++;
1627 goto no_volname_padding;
1628 }
1629 call->count = 4 - (call->count & 3);
1630
1631 case 4:
1632 ret = afs_extract_data(call, call->buffer,
1633 call->count, true);
1634 if (ret < 0)
1635 return ret;
1636
1637 call->offset = 0;
1638 call->unmarshall++;
1639 no_volname_padding:
1640
1641 /* extract the offline message length */
1642 case 5:
1643 ret = afs_extract_data(call, &call->tmp, 4, true);
1644 if (ret < 0)
1645 return ret;
1646
1647 call->count = ntohl(call->tmp);
1648 _debug("offline msg length: %u", call->count);
1649 if (call->count >= AFSNAMEMAX)
1650 return afs_protocol_error(call, -EBADMSG);
1651 call->offset = 0;
1652 call->unmarshall++;
1653
1654 /* extract the offline message */
1655 case 6:
1656 _debug("extract offline");
1657 if (call->count > 0) {
1658 ret = afs_extract_data(call, call->reply[2],
1659 call->count, true);
1660 if (ret < 0)
1661 return ret;
1662 }
1663
1664 p = call->reply[2];
1665 p[call->count] = 0;
1666 _debug("offline '%s'", p);
1667
1668 call->offset = 0;
1669 call->unmarshall++;
1670
1671 /* extract the offline message padding */
1672 if ((call->count & 3) == 0) {
1673 call->unmarshall++;
1674 goto no_offline_padding;
1675 }
1676 call->count = 4 - (call->count & 3);
1677
1678 case 7:
1679 ret = afs_extract_data(call, call->buffer,
1680 call->count, true);
1681 if (ret < 0)
1682 return ret;
1683
1684 call->offset = 0;
1685 call->unmarshall++;
1686 no_offline_padding:
1687
1688 /* extract the message of the day length */
1689 case 8:
1690 ret = afs_extract_data(call, &call->tmp, 4, true);
1691 if (ret < 0)
1692 return ret;
1693
1694 call->count = ntohl(call->tmp);
1695 _debug("motd length: %u", call->count);
1696 if (call->count >= AFSNAMEMAX)
1697 return afs_protocol_error(call, -EBADMSG);
1698 call->offset = 0;
1699 call->unmarshall++;
1700
1701 /* extract the message of the day */
1702 case 9:
1703 _debug("extract motd");
1704 if (call->count > 0) {
1705 ret = afs_extract_data(call, call->reply[2],
1706 call->count, true);
1707 if (ret < 0)
1708 return ret;
1709 }
1710
1711 p = call->reply[2];
1712 p[call->count] = 0;
1713 _debug("motd '%s'", p);
1714
1715 call->offset = 0;
1716 call->unmarshall++;
1717
1718 /* extract the message of the day padding */
1719 call->count = (4 - (call->count & 3)) & 3;
1720
1721 case 10:
1722 ret = afs_extract_data(call, call->buffer,
1723 call->count, false);
1724 if (ret < 0)
1725 return ret;
1726
1727 call->offset = 0;
1728 call->unmarshall++;
1729 case 11:
1730 break;
1731 }
1732
1733 _leave(" = 0 [done]");
1734 return 0;
1735}
1736
1737/*
1738 * destroy an FS.GetVolumeStatus call
1739 */
1740static void afs_get_volume_status_call_destructor(struct afs_call *call)
1741{
1742 kfree(call->reply[2]);
1743 call->reply[2] = NULL;
1744 afs_flat_call_destructor(call);
1745}
1746
1747/*
1748 * FS.GetVolumeStatus operation type
1749 */
1750static const struct afs_call_type afs_RXFSGetVolumeStatus = {
1751 .name = "FS.GetVolumeStatus",
1752 .op = afs_FS_GetVolumeStatus,
1753 .deliver = afs_deliver_fs_get_volume_status,
1754 .destructor = afs_get_volume_status_call_destructor,
1755};
1756
1757/*
1758 * fetch the status of a volume
1759 */
1760int afs_fs_get_volume_status(struct afs_fs_cursor *fc,
1761 struct afs_volume_status *vs)
1762{
1763 struct afs_vnode *vnode = fc->vnode;
1764 struct afs_call *call;
1765 struct afs_net *net = afs_v2net(vnode);
1766 __be32 *bp;
1767 void *tmpbuf;
1768
1769 _enter("");
1770
1771 tmpbuf = kmalloc(AFSOPAQUEMAX, GFP_KERNEL);
1772 if (!tmpbuf)
1773 return -ENOMEM;
1774
1775 call = afs_alloc_flat_call(net, &afs_RXFSGetVolumeStatus, 2 * 4, 12 * 4);
1776 if (!call) {
1777 kfree(tmpbuf);
1778 return -ENOMEM;
1779 }
1780
1781 call->key = fc->key;
1782 call->reply[0] = vnode;
1783 call->reply[1] = vs;
1784 call->reply[2] = tmpbuf;
1785
1786 /* marshall the parameters */
1787 bp = call->request;
1788 bp[0] = htonl(FSGETVOLUMESTATUS);
1789 bp[1] = htonl(vnode->fid.vid);
1790
1791 afs_use_fs_server(call, fc->cbi);
1792 trace_afs_make_fs_call(call, &vnode->fid);
1793 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1794}
1795
1796/*
1797 * deliver reply data to an FS.SetLock, FS.ExtendLock or FS.ReleaseLock
1798 */
1799static int afs_deliver_fs_xxxx_lock(struct afs_call *call)
1800{
1801 const __be32 *bp;
1802 int ret;
1803
1804 _enter("{%u}", call->unmarshall);
1805
1806 ret = afs_transfer_reply(call);
1807 if (ret < 0)
1808 return ret;
1809
1810 /* unmarshall the reply once we've received all of it */
1811 bp = call->buffer;
1812 /* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
1813
1814 _leave(" = 0 [done]");
1815 return 0;
1816}
1817
1818/*
1819 * FS.SetLock operation type
1820 */
1821static const struct afs_call_type afs_RXFSSetLock = {
1822 .name = "FS.SetLock",
1823 .op = afs_FS_SetLock,
1824 .deliver = afs_deliver_fs_xxxx_lock,
1825 .destructor = afs_flat_call_destructor,
1826};
1827
1828/*
1829 * FS.ExtendLock operation type
1830 */
1831static const struct afs_call_type afs_RXFSExtendLock = {
1832 .name = "FS.ExtendLock",
1833 .op = afs_FS_ExtendLock,
1834 .deliver = afs_deliver_fs_xxxx_lock,
1835 .destructor = afs_flat_call_destructor,
1836};
1837
1838/*
1839 * FS.ReleaseLock operation type
1840 */
1841static const struct afs_call_type afs_RXFSReleaseLock = {
1842 .name = "FS.ReleaseLock",
1843 .op = afs_FS_ReleaseLock,
1844 .deliver = afs_deliver_fs_xxxx_lock,
1845 .destructor = afs_flat_call_destructor,
1846};
1847
1848/*
1849 * Set a lock on a file
1850 */
1851int afs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type)
1852{
1853 struct afs_vnode *vnode = fc->vnode;
1854 struct afs_call *call;
1855 struct afs_net *net = afs_v2net(vnode);
1856 __be32 *bp;
1857
1858 _enter("");
1859
1860 call = afs_alloc_flat_call(net, &afs_RXFSSetLock, 5 * 4, 6 * 4);
1861 if (!call)
1862 return -ENOMEM;
1863
1864 call->key = fc->key;
1865 call->reply[0] = vnode;
1866
1867 /* marshall the parameters */
1868 bp = call->request;
1869 *bp++ = htonl(FSSETLOCK);
1870 *bp++ = htonl(vnode->fid.vid);
1871 *bp++ = htonl(vnode->fid.vnode);
1872 *bp++ = htonl(vnode->fid.unique);
1873 *bp++ = htonl(type);
1874
1875 afs_use_fs_server(call, fc->cbi);
1876 trace_afs_make_fs_call(call, &vnode->fid);
1877 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1878}
1879
1880/*
1881 * extend a lock on a file
1882 */
1883int afs_fs_extend_lock(struct afs_fs_cursor *fc)
1884{
1885 struct afs_vnode *vnode = fc->vnode;
1886 struct afs_call *call;
1887 struct afs_net *net = afs_v2net(vnode);
1888 __be32 *bp;
1889
1890 _enter("");
1891
1892 call = afs_alloc_flat_call(net, &afs_RXFSExtendLock, 4 * 4, 6 * 4);
1893 if (!call)
1894 return -ENOMEM;
1895
1896 call->key = fc->key;
1897 call->reply[0] = vnode;
1898
1899 /* marshall the parameters */
1900 bp = call->request;
1901 *bp++ = htonl(FSEXTENDLOCK);
1902 *bp++ = htonl(vnode->fid.vid);
1903 *bp++ = htonl(vnode->fid.vnode);
1904 *bp++ = htonl(vnode->fid.unique);
1905
1906 afs_use_fs_server(call, fc->cbi);
1907 trace_afs_make_fs_call(call, &vnode->fid);
1908 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1909}
1910
1911/*
1912 * release a lock on a file
1913 */
1914int afs_fs_release_lock(struct afs_fs_cursor *fc)
1915{
1916 struct afs_vnode *vnode = fc->vnode;
1917 struct afs_call *call;
1918 struct afs_net *net = afs_v2net(vnode);
1919 __be32 *bp;
1920
1921 _enter("");
1922
1923 call = afs_alloc_flat_call(net, &afs_RXFSReleaseLock, 4 * 4, 6 * 4);
1924 if (!call)
1925 return -ENOMEM;
1926
1927 call->key = fc->key;
1928 call->reply[0] = vnode;
1929
1930 /* marshall the parameters */
1931 bp = call->request;
1932 *bp++ = htonl(FSRELEASELOCK);
1933 *bp++ = htonl(vnode->fid.vid);
1934 *bp++ = htonl(vnode->fid.vnode);
1935 *bp++ = htonl(vnode->fid.unique);
1936
1937 afs_use_fs_server(call, fc->cbi);
1938 trace_afs_make_fs_call(call, &vnode->fid);
1939 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1940}
1941
1942/*
1943 * Deliver reply data to an FS.GiveUpAllCallBacks operation.
1944 */
1945static int afs_deliver_fs_give_up_all_callbacks(struct afs_call *call)
1946{
1947 return afs_transfer_reply(call);
1948}
1949
1950/*
1951 * FS.GiveUpAllCallBacks operation type
1952 */
1953static const struct afs_call_type afs_RXFSGiveUpAllCallBacks = {
1954 .name = "FS.GiveUpAllCallBacks",
1955 .op = afs_FS_GiveUpAllCallBacks,
1956 .deliver = afs_deliver_fs_give_up_all_callbacks,
1957 .destructor = afs_flat_call_destructor,
1958};
1959
1960/*
1961 * Flush all the callbacks we have on a server.
1962 */
1963int afs_fs_give_up_all_callbacks(struct afs_net *net,
1964 struct afs_server *server,
1965 struct afs_addr_cursor *ac,
1966 struct key *key)
1967{
1968 struct afs_call *call;
1969 __be32 *bp;
1970
1971 _enter("");
1972
1973 call = afs_alloc_flat_call(net, &afs_RXFSGiveUpAllCallBacks, 1 * 4, 0);
1974 if (!call)
1975 return -ENOMEM;
1976
1977 call->key = key;
1978
1979 /* marshall the parameters */
1980 bp = call->request;
1981 *bp++ = htonl(FSGIVEUPALLCALLBACKS);
1982
1983 /* Can't take a ref on server */
1984 return afs_make_call(ac, call, GFP_NOFS, false);
1985}
1986
1987/*
1988 * Deliver reply data to an FS.GetCapabilities operation.
1989 */
1990static int afs_deliver_fs_get_capabilities(struct afs_call *call)
1991{
1992 u32 count;
1993 int ret;
1994
1995 _enter("{%u,%zu/%u}", call->unmarshall, call->offset, call->count);
1996
1997again:
1998 switch (call->unmarshall) {
1999 case 0:
2000 call->offset = 0;
2001 call->unmarshall++;
2002
2003 /* Extract the capabilities word count */
2004 case 1:
2005 ret = afs_extract_data(call, &call->tmp,
2006 1 * sizeof(__be32),
2007 true);
2008 if (ret < 0)
2009 return ret;
2010
2011 count = ntohl(call->tmp);
2012
2013 call->count = count;
2014 call->count2 = count;
2015 call->offset = 0;
2016 call->unmarshall++;
2017
2018 /* Extract capabilities words */
2019 case 2:
2020 count = min(call->count, 16U);
2021 ret = afs_extract_data(call, call->buffer,
2022 count * sizeof(__be32),
2023 call->count > 16);
2024 if (ret < 0)
2025 return ret;
2026
2027 /* TODO: Examine capabilities */
2028
2029 call->count -= count;
2030 if (call->count > 0)
2031 goto again;
2032 call->offset = 0;
2033 call->unmarshall++;
2034 break;
2035 }
2036
2037 _leave(" = 0 [done]");
2038 return 0;
2039}
2040
2041/*
2042 * FS.GetCapabilities operation type
2043 */
2044static const struct afs_call_type afs_RXFSGetCapabilities = {
2045 .name = "FS.GetCapabilities",
2046 .op = afs_FS_GetCapabilities,
2047 .deliver = afs_deliver_fs_get_capabilities,
2048 .destructor = afs_flat_call_destructor,
2049};
2050
2051/*
2052 * Probe a fileserver for the capabilities that it supports. This can
2053 * return up to 196 words.
2054 */
2055int afs_fs_get_capabilities(struct afs_net *net,
2056 struct afs_server *server,
2057 struct afs_addr_cursor *ac,
2058 struct key *key)
2059{
2060 struct afs_call *call;
2061 __be32 *bp;
2062
2063 _enter("");
2064
2065 call = afs_alloc_flat_call(net, &afs_RXFSGetCapabilities, 1 * 4, 16 * 4);
2066 if (!call)
2067 return -ENOMEM;
2068
2069 call->key = key;
2070
2071 /* marshall the parameters */
2072 bp = call->request;
2073 *bp++ = htonl(FSGETCAPABILITIES);
2074
2075 /* Can't take a ref on server */
2076 trace_afs_make_fs_call(call, NULL);
2077 return afs_make_call(ac, call, GFP_NOFS, false);
2078}
2079
2080/*
2081 * Deliver reply data to an FS.FetchStatus with no vnode.
2082 */
2083static int afs_deliver_fs_fetch_status(struct afs_call *call)
2084{
2085 struct afs_file_status *status = call->reply[1];
2086 struct afs_callback *callback = call->reply[2];
2087 struct afs_volsync *volsync = call->reply[3];
2088 struct afs_vnode *vnode = call->reply[0];
2089 const __be32 *bp;
2090 int ret;
2091
2092 ret = afs_transfer_reply(call);
2093 if (ret < 0)
2094 return ret;
2095
2096 _enter("{%x:%u}", vnode->fid.vid, vnode->fid.vnode);
2097
2098 /* unmarshall the reply once we've received all of it */
2099 bp = call->buffer;
2100 xdr_decode_AFSFetchStatus(call, &bp, status, vnode,
2101 &call->expected_version, NULL);
2102 callback[call->count].version = ntohl(bp[0]);
2103 callback[call->count].expiry = ntohl(bp[1]);
2104 callback[call->count].type = ntohl(bp[2]);
2105 if (vnode)
2106 xdr_decode_AFSCallBack(call, vnode, &bp);
2107 else
2108 bp += 3;
2109 if (volsync)
2110 xdr_decode_AFSVolSync(&bp, volsync);
2111
2112 _leave(" = 0 [done]");
2113 return 0;
2114}
2115
2116/*
2117 * FS.FetchStatus operation type
2118 */
2119static const struct afs_call_type afs_RXFSFetchStatus = {
2120 .name = "FS.FetchStatus",
2121 .op = afs_FS_FetchStatus,
2122 .deliver = afs_deliver_fs_fetch_status,
2123 .destructor = afs_flat_call_destructor,
2124};
2125
2126/*
2127 * Fetch the status information for a fid without needing a vnode handle.
2128 */
2129int afs_fs_fetch_status(struct afs_fs_cursor *fc,
2130 struct afs_net *net,
2131 struct afs_fid *fid,
2132 struct afs_file_status *status,
2133 struct afs_callback *callback,
2134 struct afs_volsync *volsync)
2135{
2136 struct afs_call *call;
2137 __be32 *bp;
2138
2139 _enter(",%x,{%x:%u},,",
2140 key_serial(fc->key), fid->vid, fid->vnode);
2141
2142 call = afs_alloc_flat_call(net, &afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4);
2143 if (!call) {
2144 fc->ac.error = -ENOMEM;
2145 return -ENOMEM;
2146 }
2147
2148 call->key = fc->key;
2149 call->reply[0] = NULL; /* vnode for fid[0] */
2150 call->reply[1] = status;
2151 call->reply[2] = callback;
2152 call->reply[3] = volsync;
2153 call->expected_version = 1; /* vnode->status.data_version */
2154
2155 /* marshall the parameters */
2156 bp = call->request;
2157 bp[0] = htonl(FSFETCHSTATUS);
2158 bp[1] = htonl(fid->vid);
2159 bp[2] = htonl(fid->vnode);
2160 bp[3] = htonl(fid->unique);
2161
2162 call->cb_break = fc->cb_break;
2163 afs_use_fs_server(call, fc->cbi);
2164 trace_afs_make_fs_call(call, fid);
2165 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
2166}
2167
2168/*
2169 * Deliver reply data to an FS.InlineBulkStatus call
2170 */
2171static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
2172{
2173 struct afs_file_status *statuses;
2174 struct afs_callback *callbacks;
2175 struct afs_vnode *vnode = call->reply[0];
2176 const __be32 *bp;
2177 u32 tmp;
2178 int ret;
2179
2180 _enter("{%u}", call->unmarshall);
2181
2182 switch (call->unmarshall) {
2183 case 0:
2184 call->offset = 0;
2185 call->unmarshall++;
2186
2187 /* Extract the file status count and array in two steps */
2188 case 1:
2189 _debug("extract status count");
2190 ret = afs_extract_data(call, &call->tmp, 4, true);
2191 if (ret < 0)
2192 return ret;
2193
2194 tmp = ntohl(call->tmp);
2195 _debug("status count: %u/%u", tmp, call->count2);
2196 if (tmp != call->count2)
2197 return afs_protocol_error(call, -EBADMSG);
2198
2199 call->count = 0;
2200 call->unmarshall++;
2201 more_counts:
2202 call->offset = 0;
2203
2204 case 2:
2205 _debug("extract status array %u", call->count);
2206 ret = afs_extract_data(call, call->buffer, 21 * 4, true);
2207 if (ret < 0)
2208 return ret;
2209
2210 bp = call->buffer;
2211 statuses = call->reply[1];
2212 if (xdr_decode_AFSFetchStatus(call, &bp, &statuses[call->count],
2213 call->count == 0 ? vnode : NULL,
2214 NULL, NULL) < 0)
2215 return afs_protocol_error(call, -EBADMSG);
2216
2217 call->count++;
2218 if (call->count < call->count2)
2219 goto more_counts;
2220
2221 call->count = 0;
2222 call->unmarshall++;
2223 call->offset = 0;
2224
2225 /* Extract the callback count and array in two steps */
2226 case 3:
2227 _debug("extract CB count");
2228 ret = afs_extract_data(call, &call->tmp, 4, true);
2229 if (ret < 0)
2230 return ret;
2231
2232 tmp = ntohl(call->tmp);
2233 _debug("CB count: %u", tmp);
2234 if (tmp != call->count2)
2235 return afs_protocol_error(call, -EBADMSG);
2236 call->count = 0;
2237 call->unmarshall++;
2238 more_cbs:
2239 call->offset = 0;
2240
2241 case 4:
2242 _debug("extract CB array");
2243 ret = afs_extract_data(call, call->buffer, 3 * 4, true);
2244 if (ret < 0)
2245 return ret;
2246
2247 _debug("unmarshall CB array");
2248 bp = call->buffer;
2249 callbacks = call->reply[2];
2250 callbacks[call->count].version = ntohl(bp[0]);
2251 callbacks[call->count].expiry = ntohl(bp[1]);
2252 callbacks[call->count].type = ntohl(bp[2]);
2253 statuses = call->reply[1];
2254 if (call->count == 0 && vnode && statuses[0].abort_code == 0)
2255 xdr_decode_AFSCallBack(call, vnode, &bp);
2256 call->count++;
2257 if (call->count < call->count2)
2258 goto more_cbs;
2259
2260 call->offset = 0;
2261 call->unmarshall++;
2262
2263 case 5:
2264 ret = afs_extract_data(call, call->buffer, 6 * 4, false);
2265 if (ret < 0)
2266 return ret;
2267
2268 bp = call->buffer;
2269 if (call->reply[3])
2270 xdr_decode_AFSVolSync(&bp, call->reply[3]);
2271
2272 call->offset = 0;
2273 call->unmarshall++;
2274
2275 case 6:
2276 break;
2277 }
2278
2279 _leave(" = 0 [done]");
2280 return 0;
2281}
2282
2283/*
2284 * FS.InlineBulkStatus operation type
2285 */
2286static const struct afs_call_type afs_RXFSInlineBulkStatus = {
2287 .name = "FS.InlineBulkStatus",
2288 .op = afs_FS_InlineBulkStatus,
2289 .deliver = afs_deliver_fs_inline_bulk_status,
2290 .destructor = afs_flat_call_destructor,
2291};
2292
2293/*
2294 * Fetch the status information for up to 50 files
2295 */
2296int afs_fs_inline_bulk_status(struct afs_fs_cursor *fc,
2297 struct afs_net *net,
2298 struct afs_fid *fids,
2299 struct afs_file_status *statuses,
2300 struct afs_callback *callbacks,
2301 unsigned int nr_fids,
2302 struct afs_volsync *volsync)
2303{
2304 struct afs_call *call;
2305 __be32 *bp;
2306 int i;
2307
2308 _enter(",%x,{%x:%u},%u",
2309 key_serial(fc->key), fids[0].vid, fids[1].vnode, nr_fids);
2310
2311 call = afs_alloc_flat_call(net, &afs_RXFSInlineBulkStatus,
2312 (2 + nr_fids * 3) * 4,
2313 21 * 4);
2314 if (!call) {
2315 fc->ac.error = -ENOMEM;
2316 return -ENOMEM;
2317 }
2318
2319 call->key = fc->key;
2320 call->reply[0] = NULL; /* vnode for fid[0] */
2321 call->reply[1] = statuses;
2322 call->reply[2] = callbacks;
2323 call->reply[3] = volsync;
2324 call->count2 = nr_fids;
2325
2326 /* marshall the parameters */
2327 bp = call->request;
2328 *bp++ = htonl(FSINLINEBULKSTATUS);
2329 *bp++ = htonl(nr_fids);
2330 for (i = 0; i < nr_fids; i++) {
2331 *bp++ = htonl(fids[i].vid);
2332 *bp++ = htonl(fids[i].vnode);
2333 *bp++ = htonl(fids[i].unique);
2334 }
2335
2336 call->cb_break = fc->cb_break;
2337 afs_use_fs_server(call, fc->cbi);
2338 trace_afs_make_fs_call(call, &fids[0]);
2339 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
2340}