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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 trace_afs_make_fs_call(call, &vp->fid);
294 afs_make_op_call(op, call, GFP_NOFS);
295}
296
297/*
298 * deliver reply data to an FS.FetchData
299 */
300static int afs_deliver_fs_fetch_data(struct afs_call *call)
301{
302 struct afs_operation *op = call->op;
303 struct afs_vnode_param *vp = &op->file[0];
304 struct afs_read *req = op->fetch.req;
305 const __be32 *bp;
306 int ret;
307
308 _enter("{%u,%zu,%zu/%llu}",
309 call->unmarshall, call->iov_len, iov_iter_count(call->iter),
310 req->actual_len);
311
312 switch (call->unmarshall) {
313 case 0:
314 req->actual_len = 0;
315 call->unmarshall++;
316 if (call->operation_ID == FSFETCHDATA64) {
317 afs_extract_to_tmp64(call);
318 } else {
319 call->tmp_u = htonl(0);
320 afs_extract_to_tmp(call);
321 }
322 fallthrough;
323
324 /* Extract the returned data length into
325 * ->actual_len. This may indicate more or less data than was
326 * requested will be returned.
327 */
328 case 1:
329 _debug("extract data length");
330 ret = afs_extract_data(call, true);
331 if (ret < 0)
332 return ret;
333
334 req->actual_len = be64_to_cpu(call->tmp64);
335 _debug("DATA length: %llu", req->actual_len);
336
337 if (req->actual_len == 0)
338 goto no_more_data;
339
340 call->iter = req->iter;
341 call->iov_len = min(req->actual_len, req->len);
342 call->unmarshall++;
343 fallthrough;
344
345 /* extract the returned data */
346 case 2:
347 _debug("extract data %zu/%llu",
348 iov_iter_count(call->iter), req->actual_len);
349
350 ret = afs_extract_data(call, true);
351 if (ret < 0)
352 return ret;
353
354 call->iter = &call->def_iter;
355 if (req->actual_len <= req->len)
356 goto no_more_data;
357
358 /* Discard any excess data the server gave us */
359 afs_extract_discard(call, req->actual_len - req->len);
360 call->unmarshall = 3;
361 fallthrough;
362
363 case 3:
364 _debug("extract discard %zu/%llu",
365 iov_iter_count(call->iter), req->actual_len - req->len);
366
367 ret = afs_extract_data(call, true);
368 if (ret < 0)
369 return ret;
370
371 no_more_data:
372 call->unmarshall = 4;
373 afs_extract_to_buf(call, (21 + 3 + 6) * 4);
374 fallthrough;
375
376 /* extract the metadata */
377 case 4:
378 ret = afs_extract_data(call, false);
379 if (ret < 0)
380 return ret;
381
382 bp = call->buffer;
383 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
384 xdr_decode_AFSCallBack(&bp, call, &vp->scb);
385 xdr_decode_AFSVolSync(&bp, &op->volsync);
386
387 req->data_version = vp->scb.status.data_version;
388 req->file_size = vp->scb.status.size;
389
390 call->unmarshall++;
391 fallthrough;
392
393 case 5:
394 break;
395 }
396
397 _leave(" = 0 [done]");
398 return 0;
399}
400
401/*
402 * FS.FetchData operation type
403 */
404static const struct afs_call_type afs_RXFSFetchData = {
405 .name = "FS.FetchData",
406 .op = afs_FS_FetchData,
407 .deliver = afs_deliver_fs_fetch_data,
408 .destructor = afs_flat_call_destructor,
409};
410
411static const struct afs_call_type afs_RXFSFetchData64 = {
412 .name = "FS.FetchData64",
413 .op = afs_FS_FetchData64,
414 .deliver = afs_deliver_fs_fetch_data,
415 .destructor = afs_flat_call_destructor,
416};
417
418/*
419 * fetch data from a very large file
420 */
421static void afs_fs_fetch_data64(struct afs_operation *op)
422{
423 struct afs_vnode_param *vp = &op->file[0];
424 struct afs_read *req = op->fetch.req;
425 struct afs_call *call;
426 __be32 *bp;
427
428 _enter("");
429
430 call = afs_alloc_flat_call(op->net, &afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4);
431 if (!call)
432 return afs_op_nomem(op);
433
434 /* marshall the parameters */
435 bp = call->request;
436 bp[0] = htonl(FSFETCHDATA64);
437 bp[1] = htonl(vp->fid.vid);
438 bp[2] = htonl(vp->fid.vnode);
439 bp[3] = htonl(vp->fid.unique);
440 bp[4] = htonl(upper_32_bits(req->pos));
441 bp[5] = htonl(lower_32_bits(req->pos));
442 bp[6] = 0;
443 bp[7] = htonl(lower_32_bits(req->len));
444
445 trace_afs_make_fs_call(call, &vp->fid);
446 afs_make_op_call(op, call, GFP_NOFS);
447}
448
449/*
450 * fetch data from a file
451 */
452void afs_fs_fetch_data(struct afs_operation *op)
453{
454 struct afs_vnode_param *vp = &op->file[0];
455 struct afs_call *call;
456 struct afs_read *req = op->fetch.req;
457 __be32 *bp;
458
459 if (test_bit(AFS_SERVER_FL_HAS_FS64, &op->server->flags))
460 return afs_fs_fetch_data64(op);
461
462 _enter("");
463
464 call = afs_alloc_flat_call(op->net, &afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
465 if (!call)
466 return afs_op_nomem(op);
467
468 req->call_debug_id = call->debug_id;
469
470 /* marshall the parameters */
471 bp = call->request;
472 bp[0] = htonl(FSFETCHDATA);
473 bp[1] = htonl(vp->fid.vid);
474 bp[2] = htonl(vp->fid.vnode);
475 bp[3] = htonl(vp->fid.unique);
476 bp[4] = htonl(lower_32_bits(req->pos));
477 bp[5] = htonl(lower_32_bits(req->len));
478
479 trace_afs_make_fs_call(call, &vp->fid);
480 afs_make_op_call(op, call, GFP_NOFS);
481}
482
483/*
484 * deliver reply data to an FS.CreateFile or an FS.MakeDir
485 */
486static int afs_deliver_fs_create_vnode(struct afs_call *call)
487{
488 struct afs_operation *op = call->op;
489 struct afs_vnode_param *dvp = &op->file[0];
490 struct afs_vnode_param *vp = &op->file[1];
491 const __be32 *bp;
492 int ret;
493
494 ret = afs_transfer_reply(call);
495 if (ret < 0)
496 return ret;
497
498 /* unmarshall the reply once we've received all of it */
499 bp = call->buffer;
500 xdr_decode_AFSFid(&bp, &op->file[1].fid);
501 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
502 xdr_decode_AFSFetchStatus(&bp, call, &dvp->scb);
503 xdr_decode_AFSCallBack(&bp, call, &vp->scb);
504 xdr_decode_AFSVolSync(&bp, &op->volsync);
505
506 _leave(" = 0 [done]");
507 return 0;
508}
509
510/*
511 * FS.CreateFile and FS.MakeDir operation type
512 */
513static const struct afs_call_type afs_RXFSCreateFile = {
514 .name = "FS.CreateFile",
515 .op = afs_FS_CreateFile,
516 .deliver = afs_deliver_fs_create_vnode,
517 .destructor = afs_flat_call_destructor,
518};
519
520/*
521 * Create a file.
522 */
523void afs_fs_create_file(struct afs_operation *op)
524{
525 const struct qstr *name = &op->dentry->d_name;
526 struct afs_vnode_param *dvp = &op->file[0];
527 struct afs_call *call;
528 size_t namesz, reqsz, padsz;
529 __be32 *bp;
530
531 _enter("");
532
533 namesz = name->len;
534 padsz = (4 - (namesz & 3)) & 3;
535 reqsz = (5 * 4) + namesz + padsz + (6 * 4);
536
537 call = afs_alloc_flat_call(op->net, &afs_RXFSCreateFile,
538 reqsz, (3 + 21 + 21 + 3 + 6) * 4);
539 if (!call)
540 return afs_op_nomem(op);
541
542 /* marshall the parameters */
543 bp = call->request;
544 *bp++ = htonl(FSCREATEFILE);
545 *bp++ = htonl(dvp->fid.vid);
546 *bp++ = htonl(dvp->fid.vnode);
547 *bp++ = htonl(dvp->fid.unique);
548 *bp++ = htonl(namesz);
549 memcpy(bp, name->name, namesz);
550 bp = (void *) bp + namesz;
551 if (padsz > 0) {
552 memset(bp, 0, padsz);
553 bp = (void *) bp + padsz;
554 }
555 *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
556 *bp++ = htonl(op->mtime.tv_sec); /* mtime */
557 *bp++ = 0; /* owner */
558 *bp++ = 0; /* group */
559 *bp++ = htonl(op->create.mode & S_IALLUGO); /* unix mode */
560 *bp++ = 0; /* segment size */
561
562 trace_afs_make_fs_call1(call, &dvp->fid, name);
563 afs_make_op_call(op, call, GFP_NOFS);
564}
565
566static const struct afs_call_type afs_RXFSMakeDir = {
567 .name = "FS.MakeDir",
568 .op = afs_FS_MakeDir,
569 .deliver = afs_deliver_fs_create_vnode,
570 .destructor = afs_flat_call_destructor,
571};
572
573/*
574 * Create a new directory
575 */
576void afs_fs_make_dir(struct afs_operation *op)
577{
578 const struct qstr *name = &op->dentry->d_name;
579 struct afs_vnode_param *dvp = &op->file[0];
580 struct afs_call *call;
581 size_t namesz, reqsz, padsz;
582 __be32 *bp;
583
584 _enter("");
585
586 namesz = name->len;
587 padsz = (4 - (namesz & 3)) & 3;
588 reqsz = (5 * 4) + namesz + padsz + (6 * 4);
589
590 call = afs_alloc_flat_call(op->net, &afs_RXFSMakeDir,
591 reqsz, (3 + 21 + 21 + 3 + 6) * 4);
592 if (!call)
593 return afs_op_nomem(op);
594
595 /* marshall the parameters */
596 bp = call->request;
597 *bp++ = htonl(FSMAKEDIR);
598 *bp++ = htonl(dvp->fid.vid);
599 *bp++ = htonl(dvp->fid.vnode);
600 *bp++ = htonl(dvp->fid.unique);
601 *bp++ = htonl(namesz);
602 memcpy(bp, name->name, namesz);
603 bp = (void *) bp + namesz;
604 if (padsz > 0) {
605 memset(bp, 0, padsz);
606 bp = (void *) bp + padsz;
607 }
608 *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
609 *bp++ = htonl(op->mtime.tv_sec); /* mtime */
610 *bp++ = 0; /* owner */
611 *bp++ = 0; /* group */
612 *bp++ = htonl(op->create.mode & S_IALLUGO); /* unix mode */
613 *bp++ = 0; /* segment size */
614
615 trace_afs_make_fs_call1(call, &dvp->fid, name);
616 afs_make_op_call(op, call, GFP_NOFS);
617}
618
619/*
620 * Deliver reply data to any operation that returns status and volume sync.
621 */
622static int afs_deliver_fs_file_status_and_vol(struct afs_call *call)
623{
624 struct afs_operation *op = call->op;
625 struct afs_vnode_param *vp = &op->file[0];
626 const __be32 *bp;
627 int ret;
628
629 ret = afs_transfer_reply(call);
630 if (ret < 0)
631 return ret;
632
633 /* unmarshall the reply once we've received all of it */
634 bp = call->buffer;
635 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
636 xdr_decode_AFSVolSync(&bp, &op->volsync);
637
638 _leave(" = 0 [done]");
639 return 0;
640}
641
642/*
643 * FS.RemoveFile operation type
644 */
645static const struct afs_call_type afs_RXFSRemoveFile = {
646 .name = "FS.RemoveFile",
647 .op = afs_FS_RemoveFile,
648 .deliver = afs_deliver_fs_file_status_and_vol,
649 .destructor = afs_flat_call_destructor,
650};
651
652/*
653 * Remove a file.
654 */
655void afs_fs_remove_file(struct afs_operation *op)
656{
657 const struct qstr *name = &op->dentry->d_name;
658 struct afs_vnode_param *dvp = &op->file[0];
659 struct afs_call *call;
660 size_t namesz, reqsz, padsz;
661 __be32 *bp;
662
663 _enter("");
664
665 namesz = name->len;
666 padsz = (4 - (namesz & 3)) & 3;
667 reqsz = (5 * 4) + namesz + padsz;
668
669 call = afs_alloc_flat_call(op->net, &afs_RXFSRemoveFile,
670 reqsz, (21 + 6) * 4);
671 if (!call)
672 return afs_op_nomem(op);
673
674 /* marshall the parameters */
675 bp = call->request;
676 *bp++ = htonl(FSREMOVEFILE);
677 *bp++ = htonl(dvp->fid.vid);
678 *bp++ = htonl(dvp->fid.vnode);
679 *bp++ = htonl(dvp->fid.unique);
680 *bp++ = htonl(namesz);
681 memcpy(bp, name->name, namesz);
682 bp = (void *) bp + namesz;
683 if (padsz > 0) {
684 memset(bp, 0, padsz);
685 bp = (void *) bp + padsz;
686 }
687
688 trace_afs_make_fs_call1(call, &dvp->fid, name);
689 afs_make_op_call(op, call, GFP_NOFS);
690}
691
692static const struct afs_call_type afs_RXFSRemoveDir = {
693 .name = "FS.RemoveDir",
694 .op = afs_FS_RemoveDir,
695 .deliver = afs_deliver_fs_file_status_and_vol,
696 .destructor = afs_flat_call_destructor,
697};
698
699/*
700 * Remove a directory.
701 */
702void afs_fs_remove_dir(struct afs_operation *op)
703{
704 const struct qstr *name = &op->dentry->d_name;
705 struct afs_vnode_param *dvp = &op->file[0];
706 struct afs_call *call;
707 size_t namesz, reqsz, padsz;
708 __be32 *bp;
709
710 _enter("");
711
712 namesz = name->len;
713 padsz = (4 - (namesz & 3)) & 3;
714 reqsz = (5 * 4) + namesz + padsz;
715
716 call = afs_alloc_flat_call(op->net, &afs_RXFSRemoveDir,
717 reqsz, (21 + 6) * 4);
718 if (!call)
719 return afs_op_nomem(op);
720
721 /* marshall the parameters */
722 bp = call->request;
723 *bp++ = htonl(FSREMOVEDIR);
724 *bp++ = htonl(dvp->fid.vid);
725 *bp++ = htonl(dvp->fid.vnode);
726 *bp++ = htonl(dvp->fid.unique);
727 *bp++ = htonl(namesz);
728 memcpy(bp, name->name, namesz);
729 bp = (void *) bp + namesz;
730 if (padsz > 0) {
731 memset(bp, 0, padsz);
732 bp = (void *) bp + padsz;
733 }
734
735 trace_afs_make_fs_call1(call, &dvp->fid, name);
736 afs_make_op_call(op, call, GFP_NOFS);
737}
738
739/*
740 * deliver reply data to an FS.Link
741 */
742static int afs_deliver_fs_link(struct afs_call *call)
743{
744 struct afs_operation *op = call->op;
745 struct afs_vnode_param *dvp = &op->file[0];
746 struct afs_vnode_param *vp = &op->file[1];
747 const __be32 *bp;
748 int ret;
749
750 _enter("{%u}", call->unmarshall);
751
752 ret = afs_transfer_reply(call);
753 if (ret < 0)
754 return ret;
755
756 /* unmarshall the reply once we've received all of it */
757 bp = call->buffer;
758 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
759 xdr_decode_AFSFetchStatus(&bp, call, &dvp->scb);
760 xdr_decode_AFSVolSync(&bp, &op->volsync);
761
762 _leave(" = 0 [done]");
763 return 0;
764}
765
766/*
767 * FS.Link operation type
768 */
769static const struct afs_call_type afs_RXFSLink = {
770 .name = "FS.Link",
771 .op = afs_FS_Link,
772 .deliver = afs_deliver_fs_link,
773 .destructor = afs_flat_call_destructor,
774};
775
776/*
777 * make a hard link
778 */
779void afs_fs_link(struct afs_operation *op)
780{
781 const struct qstr *name = &op->dentry->d_name;
782 struct afs_vnode_param *dvp = &op->file[0];
783 struct afs_vnode_param *vp = &op->file[1];
784 struct afs_call *call;
785 size_t namesz, reqsz, padsz;
786 __be32 *bp;
787
788 _enter("");
789
790 namesz = name->len;
791 padsz = (4 - (namesz & 3)) & 3;
792 reqsz = (5 * 4) + namesz + padsz + (3 * 4);
793
794 call = afs_alloc_flat_call(op->net, &afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
795 if (!call)
796 return afs_op_nomem(op);
797
798 /* marshall the parameters */
799 bp = call->request;
800 *bp++ = htonl(FSLINK);
801 *bp++ = htonl(dvp->fid.vid);
802 *bp++ = htonl(dvp->fid.vnode);
803 *bp++ = htonl(dvp->fid.unique);
804 *bp++ = htonl(namesz);
805 memcpy(bp, name->name, namesz);
806 bp = (void *) bp + namesz;
807 if (padsz > 0) {
808 memset(bp, 0, padsz);
809 bp = (void *) bp + padsz;
810 }
811 *bp++ = htonl(vp->fid.vid);
812 *bp++ = htonl(vp->fid.vnode);
813 *bp++ = htonl(vp->fid.unique);
814
815 trace_afs_make_fs_call1(call, &vp->fid, name);
816 afs_make_op_call(op, call, GFP_NOFS);
817}
818
819/*
820 * deliver reply data to an FS.Symlink
821 */
822static int afs_deliver_fs_symlink(struct afs_call *call)
823{
824 struct afs_operation *op = call->op;
825 struct afs_vnode_param *dvp = &op->file[0];
826 struct afs_vnode_param *vp = &op->file[1];
827 const __be32 *bp;
828 int ret;
829
830 _enter("{%u}", call->unmarshall);
831
832 ret = afs_transfer_reply(call);
833 if (ret < 0)
834 return ret;
835
836 /* unmarshall the reply once we've received all of it */
837 bp = call->buffer;
838 xdr_decode_AFSFid(&bp, &vp->fid);
839 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
840 xdr_decode_AFSFetchStatus(&bp, call, &dvp->scb);
841 xdr_decode_AFSVolSync(&bp, &op->volsync);
842
843 _leave(" = 0 [done]");
844 return 0;
845}
846
847/*
848 * FS.Symlink operation type
849 */
850static const struct afs_call_type afs_RXFSSymlink = {
851 .name = "FS.Symlink",
852 .op = afs_FS_Symlink,
853 .deliver = afs_deliver_fs_symlink,
854 .destructor = afs_flat_call_destructor,
855};
856
857/*
858 * create a symbolic link
859 */
860void afs_fs_symlink(struct afs_operation *op)
861{
862 const struct qstr *name = &op->dentry->d_name;
863 struct afs_vnode_param *dvp = &op->file[0];
864 struct afs_call *call;
865 size_t namesz, reqsz, padsz, c_namesz, c_padsz;
866 __be32 *bp;
867
868 _enter("");
869
870 namesz = name->len;
871 padsz = (4 - (namesz & 3)) & 3;
872
873 c_namesz = strlen(op->create.symlink);
874 c_padsz = (4 - (c_namesz & 3)) & 3;
875
876 reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4);
877
878 call = afs_alloc_flat_call(op->net, &afs_RXFSSymlink, reqsz,
879 (3 + 21 + 21 + 6) * 4);
880 if (!call)
881 return afs_op_nomem(op);
882
883 /* marshall the parameters */
884 bp = call->request;
885 *bp++ = htonl(FSSYMLINK);
886 *bp++ = htonl(dvp->fid.vid);
887 *bp++ = htonl(dvp->fid.vnode);
888 *bp++ = htonl(dvp->fid.unique);
889 *bp++ = htonl(namesz);
890 memcpy(bp, name->name, namesz);
891 bp = (void *) bp + namesz;
892 if (padsz > 0) {
893 memset(bp, 0, padsz);
894 bp = (void *) bp + padsz;
895 }
896 *bp++ = htonl(c_namesz);
897 memcpy(bp, op->create.symlink, c_namesz);
898 bp = (void *) bp + c_namesz;
899 if (c_padsz > 0) {
900 memset(bp, 0, c_padsz);
901 bp = (void *) bp + c_padsz;
902 }
903 *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
904 *bp++ = htonl(op->mtime.tv_sec); /* mtime */
905 *bp++ = 0; /* owner */
906 *bp++ = 0; /* group */
907 *bp++ = htonl(S_IRWXUGO); /* unix mode */
908 *bp++ = 0; /* segment size */
909
910 trace_afs_make_fs_call1(call, &dvp->fid, name);
911 afs_make_op_call(op, call, GFP_NOFS);
912}
913
914/*
915 * deliver reply data to an FS.Rename
916 */
917static int afs_deliver_fs_rename(struct afs_call *call)
918{
919 struct afs_operation *op = call->op;
920 struct afs_vnode_param *orig_dvp = &op->file[0];
921 struct afs_vnode_param *new_dvp = &op->file[1];
922 const __be32 *bp;
923 int ret;
924
925 ret = afs_transfer_reply(call);
926 if (ret < 0)
927 return ret;
928
929 bp = call->buffer;
930 /* If the two dirs are the same, we have two copies of the same status
931 * report, so we just decode it twice.
932 */
933 xdr_decode_AFSFetchStatus(&bp, call, &orig_dvp->scb);
934 xdr_decode_AFSFetchStatus(&bp, call, &new_dvp->scb);
935 xdr_decode_AFSVolSync(&bp, &op->volsync);
936
937 _leave(" = 0 [done]");
938 return 0;
939}
940
941/*
942 * FS.Rename operation type
943 */
944static const struct afs_call_type afs_RXFSRename = {
945 .name = "FS.Rename",
946 .op = afs_FS_Rename,
947 .deliver = afs_deliver_fs_rename,
948 .destructor = afs_flat_call_destructor,
949};
950
951/*
952 * Rename/move a file or directory.
953 */
954void afs_fs_rename(struct afs_operation *op)
955{
956 struct afs_vnode_param *orig_dvp = &op->file[0];
957 struct afs_vnode_param *new_dvp = &op->file[1];
958 const struct qstr *orig_name = &op->dentry->d_name;
959 const struct qstr *new_name = &op->dentry_2->d_name;
960 struct afs_call *call;
961 size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz;
962 __be32 *bp;
963
964 _enter("");
965
966 o_namesz = orig_name->len;
967 o_padsz = (4 - (o_namesz & 3)) & 3;
968
969 n_namesz = new_name->len;
970 n_padsz = (4 - (n_namesz & 3)) & 3;
971
972 reqsz = (4 * 4) +
973 4 + o_namesz + o_padsz +
974 (3 * 4) +
975 4 + n_namesz + n_padsz;
976
977 call = afs_alloc_flat_call(op->net, &afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
978 if (!call)
979 return afs_op_nomem(op);
980
981 /* marshall the parameters */
982 bp = call->request;
983 *bp++ = htonl(FSRENAME);
984 *bp++ = htonl(orig_dvp->fid.vid);
985 *bp++ = htonl(orig_dvp->fid.vnode);
986 *bp++ = htonl(orig_dvp->fid.unique);
987 *bp++ = htonl(o_namesz);
988 memcpy(bp, orig_name->name, o_namesz);
989 bp = (void *) bp + o_namesz;
990 if (o_padsz > 0) {
991 memset(bp, 0, o_padsz);
992 bp = (void *) bp + o_padsz;
993 }
994
995 *bp++ = htonl(new_dvp->fid.vid);
996 *bp++ = htonl(new_dvp->fid.vnode);
997 *bp++ = htonl(new_dvp->fid.unique);
998 *bp++ = htonl(n_namesz);
999 memcpy(bp, new_name->name, n_namesz);
1000 bp = (void *) bp + n_namesz;
1001 if (n_padsz > 0) {
1002 memset(bp, 0, n_padsz);
1003 bp = (void *) bp + n_padsz;
1004 }
1005
1006 trace_afs_make_fs_call2(call, &orig_dvp->fid, orig_name, new_name);
1007 afs_make_op_call(op, call, GFP_NOFS);
1008}
1009
1010/*
1011 * Deliver reply data to FS.StoreData or FS.StoreStatus
1012 */
1013static int afs_deliver_fs_store_data(struct afs_call *call)
1014{
1015 struct afs_operation *op = call->op;
1016 struct afs_vnode_param *vp = &op->file[0];
1017 const __be32 *bp;
1018 int ret;
1019
1020 _enter("");
1021
1022 ret = afs_transfer_reply(call);
1023 if (ret < 0)
1024 return ret;
1025
1026 /* unmarshall the reply once we've received all of it */
1027 bp = call->buffer;
1028 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
1029 xdr_decode_AFSVolSync(&bp, &op->volsync);
1030
1031 _leave(" = 0 [done]");
1032 return 0;
1033}
1034
1035/*
1036 * FS.StoreData operation type
1037 */
1038static const struct afs_call_type afs_RXFSStoreData = {
1039 .name = "FS.StoreData",
1040 .op = afs_FS_StoreData,
1041 .deliver = afs_deliver_fs_store_data,
1042 .destructor = afs_flat_call_destructor,
1043};
1044
1045static const struct afs_call_type afs_RXFSStoreData64 = {
1046 .name = "FS.StoreData64",
1047 .op = afs_FS_StoreData64,
1048 .deliver = afs_deliver_fs_store_data,
1049 .destructor = afs_flat_call_destructor,
1050};
1051
1052/*
1053 * store a set of pages to a very large file
1054 */
1055static void afs_fs_store_data64(struct afs_operation *op)
1056{
1057 struct afs_vnode_param *vp = &op->file[0];
1058 struct afs_call *call;
1059 __be32 *bp;
1060
1061 _enter(",%x,{%llx:%llu},,",
1062 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1063
1064 call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData64,
1065 (4 + 6 + 3 * 2) * 4,
1066 (21 + 6) * 4);
1067 if (!call)
1068 return afs_op_nomem(op);
1069
1070 call->write_iter = op->store.write_iter;
1071
1072 /* marshall the parameters */
1073 bp = call->request;
1074 *bp++ = htonl(FSSTOREDATA64);
1075 *bp++ = htonl(vp->fid.vid);
1076 *bp++ = htonl(vp->fid.vnode);
1077 *bp++ = htonl(vp->fid.unique);
1078
1079 *bp++ = htonl(AFS_SET_MTIME); /* mask */
1080 *bp++ = htonl(op->mtime.tv_sec); /* mtime */
1081 *bp++ = 0; /* owner */
1082 *bp++ = 0; /* group */
1083 *bp++ = 0; /* unix mode */
1084 *bp++ = 0; /* segment size */
1085
1086 *bp++ = htonl(upper_32_bits(op->store.pos));
1087 *bp++ = htonl(lower_32_bits(op->store.pos));
1088 *bp++ = htonl(upper_32_bits(op->store.size));
1089 *bp++ = htonl(lower_32_bits(op->store.size));
1090 *bp++ = htonl(upper_32_bits(op->store.i_size));
1091 *bp++ = htonl(lower_32_bits(op->store.i_size));
1092
1093 trace_afs_make_fs_call(call, &vp->fid);
1094 afs_make_op_call(op, call, GFP_NOFS);
1095}
1096
1097/*
1098 * Write data to a file on the server.
1099 */
1100void afs_fs_store_data(struct afs_operation *op)
1101{
1102 struct afs_vnode_param *vp = &op->file[0];
1103 struct afs_call *call;
1104 __be32 *bp;
1105
1106 _enter(",%x,{%llx:%llu},,",
1107 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1108
1109 _debug("size %llx, at %llx, i_size %llx",
1110 (unsigned long long)op->store.size,
1111 (unsigned long long)op->store.pos,
1112 (unsigned long long)op->store.i_size);
1113
1114 if (test_bit(AFS_SERVER_FL_HAS_FS64, &op->server->flags))
1115 return afs_fs_store_data64(op);
1116
1117 call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData,
1118 (4 + 6 + 3) * 4,
1119 (21 + 6) * 4);
1120 if (!call)
1121 return afs_op_nomem(op);
1122
1123 call->write_iter = op->store.write_iter;
1124
1125 /* marshall the parameters */
1126 bp = call->request;
1127 *bp++ = htonl(FSSTOREDATA);
1128 *bp++ = htonl(vp->fid.vid);
1129 *bp++ = htonl(vp->fid.vnode);
1130 *bp++ = htonl(vp->fid.unique);
1131
1132 *bp++ = htonl(AFS_SET_MTIME); /* mask */
1133 *bp++ = htonl(op->mtime.tv_sec); /* mtime */
1134 *bp++ = 0; /* owner */
1135 *bp++ = 0; /* group */
1136 *bp++ = 0; /* unix mode */
1137 *bp++ = 0; /* segment size */
1138
1139 *bp++ = htonl(lower_32_bits(op->store.pos));
1140 *bp++ = htonl(lower_32_bits(op->store.size));
1141 *bp++ = htonl(lower_32_bits(op->store.i_size));
1142
1143 trace_afs_make_fs_call(call, &vp->fid);
1144 afs_make_op_call(op, call, GFP_NOFS);
1145}
1146
1147/*
1148 * FS.StoreStatus operation type
1149 */
1150static const struct afs_call_type afs_RXFSStoreStatus = {
1151 .name = "FS.StoreStatus",
1152 .op = afs_FS_StoreStatus,
1153 .deliver = afs_deliver_fs_store_data,
1154 .destructor = afs_flat_call_destructor,
1155};
1156
1157static const struct afs_call_type afs_RXFSStoreData_as_Status = {
1158 .name = "FS.StoreData",
1159 .op = afs_FS_StoreData,
1160 .deliver = afs_deliver_fs_store_data,
1161 .destructor = afs_flat_call_destructor,
1162};
1163
1164static const struct afs_call_type afs_RXFSStoreData64_as_Status = {
1165 .name = "FS.StoreData64",
1166 .op = afs_FS_StoreData64,
1167 .deliver = afs_deliver_fs_store_data,
1168 .destructor = afs_flat_call_destructor,
1169};
1170
1171/*
1172 * set the attributes on a very large file, using FS.StoreData rather than
1173 * FS.StoreStatus so as to alter the file size also
1174 */
1175static void afs_fs_setattr_size64(struct afs_operation *op)
1176{
1177 struct afs_vnode_param *vp = &op->file[0];
1178 struct afs_call *call;
1179 struct iattr *attr = op->setattr.attr;
1180 __be32 *bp;
1181
1182 _enter(",%x,{%llx:%llu},,",
1183 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1184
1185 ASSERT(attr->ia_valid & ATTR_SIZE);
1186
1187 call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData64_as_Status,
1188 (4 + 6 + 3 * 2) * 4,
1189 (21 + 6) * 4);
1190 if (!call)
1191 return afs_op_nomem(op);
1192
1193 /* marshall the parameters */
1194 bp = call->request;
1195 *bp++ = htonl(FSSTOREDATA64);
1196 *bp++ = htonl(vp->fid.vid);
1197 *bp++ = htonl(vp->fid.vnode);
1198 *bp++ = htonl(vp->fid.unique);
1199
1200 xdr_encode_AFS_StoreStatus(&bp, attr);
1201
1202 *bp++ = htonl(upper_32_bits(attr->ia_size)); /* position of start of write */
1203 *bp++ = htonl(lower_32_bits(attr->ia_size));
1204 *bp++ = 0; /* size of write */
1205 *bp++ = 0;
1206 *bp++ = htonl(upper_32_bits(attr->ia_size)); /* new file length */
1207 *bp++ = htonl(lower_32_bits(attr->ia_size));
1208
1209 trace_afs_make_fs_call(call, &vp->fid);
1210 afs_make_op_call(op, call, GFP_NOFS);
1211}
1212
1213/*
1214 * set the attributes on a file, using FS.StoreData rather than FS.StoreStatus
1215 * so as to alter the file size also
1216 */
1217static void afs_fs_setattr_size(struct afs_operation *op)
1218{
1219 struct afs_vnode_param *vp = &op->file[0];
1220 struct afs_call *call;
1221 struct iattr *attr = op->setattr.attr;
1222 __be32 *bp;
1223
1224 _enter(",%x,{%llx:%llu},,",
1225 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1226
1227 ASSERT(attr->ia_valid & ATTR_SIZE);
1228 if (test_bit(AFS_SERVER_FL_HAS_FS64, &op->server->flags))
1229 return afs_fs_setattr_size64(op);
1230
1231 call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData_as_Status,
1232 (4 + 6 + 3) * 4,
1233 (21 + 6) * 4);
1234 if (!call)
1235 return afs_op_nomem(op);
1236
1237 /* marshall the parameters */
1238 bp = call->request;
1239 *bp++ = htonl(FSSTOREDATA);
1240 *bp++ = htonl(vp->fid.vid);
1241 *bp++ = htonl(vp->fid.vnode);
1242 *bp++ = htonl(vp->fid.unique);
1243
1244 xdr_encode_AFS_StoreStatus(&bp, attr);
1245
1246 *bp++ = htonl(attr->ia_size); /* position of start of write */
1247 *bp++ = 0; /* size of write */
1248 *bp++ = htonl(attr->ia_size); /* new file length */
1249
1250 trace_afs_make_fs_call(call, &vp->fid);
1251 afs_make_op_call(op, call, GFP_NOFS);
1252}
1253
1254/*
1255 * set the attributes on a file, using FS.StoreData if there's a change in file
1256 * size, and FS.StoreStatus otherwise
1257 */
1258void afs_fs_setattr(struct afs_operation *op)
1259{
1260 struct afs_vnode_param *vp = &op->file[0];
1261 struct afs_call *call;
1262 struct iattr *attr = op->setattr.attr;
1263 __be32 *bp;
1264
1265 if (attr->ia_valid & ATTR_SIZE)
1266 return afs_fs_setattr_size(op);
1267
1268 _enter(",%x,{%llx:%llu},,",
1269 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1270
1271 call = afs_alloc_flat_call(op->net, &afs_RXFSStoreStatus,
1272 (4 + 6) * 4,
1273 (21 + 6) * 4);
1274 if (!call)
1275 return afs_op_nomem(op);
1276
1277 /* marshall the parameters */
1278 bp = call->request;
1279 *bp++ = htonl(FSSTORESTATUS);
1280 *bp++ = htonl(vp->fid.vid);
1281 *bp++ = htonl(vp->fid.vnode);
1282 *bp++ = htonl(vp->fid.unique);
1283
1284 xdr_encode_AFS_StoreStatus(&bp, op->setattr.attr);
1285
1286 trace_afs_make_fs_call(call, &vp->fid);
1287 afs_make_op_call(op, call, GFP_NOFS);
1288}
1289
1290/*
1291 * deliver reply data to an FS.GetVolumeStatus
1292 */
1293static int afs_deliver_fs_get_volume_status(struct afs_call *call)
1294{
1295 struct afs_operation *op = call->op;
1296 const __be32 *bp;
1297 char *p;
1298 u32 size;
1299 int ret;
1300
1301 _enter("{%u}", call->unmarshall);
1302
1303 switch (call->unmarshall) {
1304 case 0:
1305 call->unmarshall++;
1306 afs_extract_to_buf(call, 12 * 4);
1307 fallthrough;
1308
1309 /* extract the returned status record */
1310 case 1:
1311 _debug("extract status");
1312 ret = afs_extract_data(call, true);
1313 if (ret < 0)
1314 return ret;
1315
1316 bp = call->buffer;
1317 xdr_decode_AFSFetchVolumeStatus(&bp, &op->volstatus.vs);
1318 call->unmarshall++;
1319 afs_extract_to_tmp(call);
1320 fallthrough;
1321
1322 /* extract the volume name length */
1323 case 2:
1324 ret = afs_extract_data(call, true);
1325 if (ret < 0)
1326 return ret;
1327
1328 call->count = ntohl(call->tmp);
1329 _debug("volname length: %u", call->count);
1330 if (call->count >= AFSNAMEMAX)
1331 return afs_protocol_error(call, afs_eproto_volname_len);
1332 size = (call->count + 3) & ~3; /* It's padded */
1333 afs_extract_to_buf(call, size);
1334 call->unmarshall++;
1335 fallthrough;
1336
1337 /* extract the volume name */
1338 case 3:
1339 _debug("extract volname");
1340 ret = afs_extract_data(call, true);
1341 if (ret < 0)
1342 return ret;
1343
1344 p = call->buffer;
1345 p[call->count] = 0;
1346 _debug("volname '%s'", p);
1347 afs_extract_to_tmp(call);
1348 call->unmarshall++;
1349 fallthrough;
1350
1351 /* extract the offline message length */
1352 case 4:
1353 ret = afs_extract_data(call, true);
1354 if (ret < 0)
1355 return ret;
1356
1357 call->count = ntohl(call->tmp);
1358 _debug("offline msg length: %u", call->count);
1359 if (call->count >= AFSNAMEMAX)
1360 return afs_protocol_error(call, afs_eproto_offline_msg_len);
1361 size = (call->count + 3) & ~3; /* It's padded */
1362 afs_extract_to_buf(call, size);
1363 call->unmarshall++;
1364 fallthrough;
1365
1366 /* extract the offline message */
1367 case 5:
1368 _debug("extract offline");
1369 ret = afs_extract_data(call, true);
1370 if (ret < 0)
1371 return ret;
1372
1373 p = call->buffer;
1374 p[call->count] = 0;
1375 _debug("offline '%s'", p);
1376
1377 afs_extract_to_tmp(call);
1378 call->unmarshall++;
1379 fallthrough;
1380
1381 /* extract the message of the day length */
1382 case 6:
1383 ret = afs_extract_data(call, true);
1384 if (ret < 0)
1385 return ret;
1386
1387 call->count = ntohl(call->tmp);
1388 _debug("motd length: %u", call->count);
1389 if (call->count >= AFSNAMEMAX)
1390 return afs_protocol_error(call, afs_eproto_motd_len);
1391 size = (call->count + 3) & ~3; /* It's padded */
1392 afs_extract_to_buf(call, size);
1393 call->unmarshall++;
1394 fallthrough;
1395
1396 /* extract the message of the day */
1397 case 7:
1398 _debug("extract motd");
1399 ret = afs_extract_data(call, false);
1400 if (ret < 0)
1401 return ret;
1402
1403 p = call->buffer;
1404 p[call->count] = 0;
1405 _debug("motd '%s'", p);
1406
1407 call->unmarshall++;
1408 fallthrough;
1409
1410 case 8:
1411 break;
1412 }
1413
1414 _leave(" = 0 [done]");
1415 return 0;
1416}
1417
1418/*
1419 * FS.GetVolumeStatus operation type
1420 */
1421static const struct afs_call_type afs_RXFSGetVolumeStatus = {
1422 .name = "FS.GetVolumeStatus",
1423 .op = afs_FS_GetVolumeStatus,
1424 .deliver = afs_deliver_fs_get_volume_status,
1425 .destructor = afs_flat_call_destructor,
1426};
1427
1428/*
1429 * fetch the status of a volume
1430 */
1431void afs_fs_get_volume_status(struct afs_operation *op)
1432{
1433 struct afs_vnode_param *vp = &op->file[0];
1434 struct afs_call *call;
1435 __be32 *bp;
1436
1437 _enter("");
1438
1439 call = afs_alloc_flat_call(op->net, &afs_RXFSGetVolumeStatus, 2 * 4,
1440 max(12 * 4, AFSOPAQUEMAX + 1));
1441 if (!call)
1442 return afs_op_nomem(op);
1443
1444 /* marshall the parameters */
1445 bp = call->request;
1446 bp[0] = htonl(FSGETVOLUMESTATUS);
1447 bp[1] = htonl(vp->fid.vid);
1448
1449 trace_afs_make_fs_call(call, &vp->fid);
1450 afs_make_op_call(op, call, GFP_NOFS);
1451}
1452
1453/*
1454 * deliver reply data to an FS.SetLock, FS.ExtendLock or FS.ReleaseLock
1455 */
1456static int afs_deliver_fs_xxxx_lock(struct afs_call *call)
1457{
1458 struct afs_operation *op = call->op;
1459 const __be32 *bp;
1460 int ret;
1461
1462 _enter("{%u}", call->unmarshall);
1463
1464 ret = afs_transfer_reply(call);
1465 if (ret < 0)
1466 return ret;
1467
1468 /* unmarshall the reply once we've received all of it */
1469 bp = call->buffer;
1470 xdr_decode_AFSVolSync(&bp, &op->volsync);
1471
1472 _leave(" = 0 [done]");
1473 return 0;
1474}
1475
1476/*
1477 * FS.SetLock operation type
1478 */
1479static const struct afs_call_type afs_RXFSSetLock = {
1480 .name = "FS.SetLock",
1481 .op = afs_FS_SetLock,
1482 .deliver = afs_deliver_fs_xxxx_lock,
1483 .done = afs_lock_op_done,
1484 .destructor = afs_flat_call_destructor,
1485};
1486
1487/*
1488 * FS.ExtendLock operation type
1489 */
1490static const struct afs_call_type afs_RXFSExtendLock = {
1491 .name = "FS.ExtendLock",
1492 .op = afs_FS_ExtendLock,
1493 .deliver = afs_deliver_fs_xxxx_lock,
1494 .done = afs_lock_op_done,
1495 .destructor = afs_flat_call_destructor,
1496};
1497
1498/*
1499 * FS.ReleaseLock operation type
1500 */
1501static const struct afs_call_type afs_RXFSReleaseLock = {
1502 .name = "FS.ReleaseLock",
1503 .op = afs_FS_ReleaseLock,
1504 .deliver = afs_deliver_fs_xxxx_lock,
1505 .destructor = afs_flat_call_destructor,
1506};
1507
1508/*
1509 * Set a lock on a file
1510 */
1511void afs_fs_set_lock(struct afs_operation *op)
1512{
1513 struct afs_vnode_param *vp = &op->file[0];
1514 struct afs_call *call;
1515 __be32 *bp;
1516
1517 _enter("");
1518
1519 call = afs_alloc_flat_call(op->net, &afs_RXFSSetLock, 5 * 4, 6 * 4);
1520 if (!call)
1521 return afs_op_nomem(op);
1522
1523 /* marshall the parameters */
1524 bp = call->request;
1525 *bp++ = htonl(FSSETLOCK);
1526 *bp++ = htonl(vp->fid.vid);
1527 *bp++ = htonl(vp->fid.vnode);
1528 *bp++ = htonl(vp->fid.unique);
1529 *bp++ = htonl(op->lock.type);
1530
1531 trace_afs_make_fs_calli(call, &vp->fid, op->lock.type);
1532 afs_make_op_call(op, call, GFP_NOFS);
1533}
1534
1535/*
1536 * extend a lock on a file
1537 */
1538void afs_fs_extend_lock(struct afs_operation *op)
1539{
1540 struct afs_vnode_param *vp = &op->file[0];
1541 struct afs_call *call;
1542 __be32 *bp;
1543
1544 _enter("");
1545
1546 call = afs_alloc_flat_call(op->net, &afs_RXFSExtendLock, 4 * 4, 6 * 4);
1547 if (!call)
1548 return afs_op_nomem(op);
1549
1550 /* marshall the parameters */
1551 bp = call->request;
1552 *bp++ = htonl(FSEXTENDLOCK);
1553 *bp++ = htonl(vp->fid.vid);
1554 *bp++ = htonl(vp->fid.vnode);
1555 *bp++ = htonl(vp->fid.unique);
1556
1557 trace_afs_make_fs_call(call, &vp->fid);
1558 afs_make_op_call(op, call, GFP_NOFS);
1559}
1560
1561/*
1562 * release a lock on a file
1563 */
1564void afs_fs_release_lock(struct afs_operation *op)
1565{
1566 struct afs_vnode_param *vp = &op->file[0];
1567 struct afs_call *call;
1568 __be32 *bp;
1569
1570 _enter("");
1571
1572 call = afs_alloc_flat_call(op->net, &afs_RXFSReleaseLock, 4 * 4, 6 * 4);
1573 if (!call)
1574 return afs_op_nomem(op);
1575
1576 /* marshall the parameters */
1577 bp = call->request;
1578 *bp++ = htonl(FSRELEASELOCK);
1579 *bp++ = htonl(vp->fid.vid);
1580 *bp++ = htonl(vp->fid.vnode);
1581 *bp++ = htonl(vp->fid.unique);
1582
1583 trace_afs_make_fs_call(call, &vp->fid);
1584 afs_make_op_call(op, call, GFP_NOFS);
1585}
1586
1587/*
1588 * Deliver reply data to an FS.GiveUpAllCallBacks operation.
1589 */
1590static int afs_deliver_fs_give_up_all_callbacks(struct afs_call *call)
1591{
1592 return afs_transfer_reply(call);
1593}
1594
1595/*
1596 * FS.GiveUpAllCallBacks operation type
1597 */
1598static const struct afs_call_type afs_RXFSGiveUpAllCallBacks = {
1599 .name = "FS.GiveUpAllCallBacks",
1600 .op = afs_FS_GiveUpAllCallBacks,
1601 .deliver = afs_deliver_fs_give_up_all_callbacks,
1602 .destructor = afs_flat_call_destructor,
1603};
1604
1605/*
1606 * Flush all the callbacks we have on a server.
1607 */
1608int afs_fs_give_up_all_callbacks(struct afs_net *net,
1609 struct afs_server *server,
1610 struct afs_addr_cursor *ac,
1611 struct key *key)
1612{
1613 struct afs_call *call;
1614 __be32 *bp;
1615
1616 _enter("");
1617
1618 call = afs_alloc_flat_call(net, &afs_RXFSGiveUpAllCallBacks, 1 * 4, 0);
1619 if (!call)
1620 return -ENOMEM;
1621
1622 call->key = key;
1623
1624 /* marshall the parameters */
1625 bp = call->request;
1626 *bp++ = htonl(FSGIVEUPALLCALLBACKS);
1627
1628 call->server = afs_use_server(server, afs_server_trace_give_up_cb);
1629 afs_make_call(ac, call, GFP_NOFS);
1630 return afs_wait_for_call_to_complete(call, ac);
1631}
1632
1633/*
1634 * Deliver reply data to an FS.GetCapabilities operation.
1635 */
1636static int afs_deliver_fs_get_capabilities(struct afs_call *call)
1637{
1638 u32 count;
1639 int ret;
1640
1641 _enter("{%u,%zu}", call->unmarshall, iov_iter_count(call->iter));
1642
1643 switch (call->unmarshall) {
1644 case 0:
1645 afs_extract_to_tmp(call);
1646 call->unmarshall++;
1647 fallthrough;
1648
1649 /* Extract the capabilities word count */
1650 case 1:
1651 ret = afs_extract_data(call, true);
1652 if (ret < 0)
1653 return ret;
1654
1655 count = ntohl(call->tmp);
1656 call->count = count;
1657 call->count2 = count;
1658 if (count == 0) {
1659 call->unmarshall = 4;
1660 call->tmp = 0;
1661 break;
1662 }
1663
1664 /* Extract the first word of the capabilities to call->tmp */
1665 afs_extract_to_tmp(call);
1666 call->unmarshall++;
1667 fallthrough;
1668
1669 case 2:
1670 ret = afs_extract_data(call, false);
1671 if (ret < 0)
1672 return ret;
1673
1674 afs_extract_discard(call, (count - 1) * sizeof(__be32));
1675 call->unmarshall++;
1676 fallthrough;
1677
1678 /* Extract remaining capabilities words */
1679 case 3:
1680 ret = afs_extract_data(call, false);
1681 if (ret < 0)
1682 return ret;
1683
1684 call->unmarshall++;
1685 break;
1686 }
1687
1688 _leave(" = 0 [done]");
1689 return 0;
1690}
1691
1692/*
1693 * FS.GetCapabilities operation type
1694 */
1695static const struct afs_call_type afs_RXFSGetCapabilities = {
1696 .name = "FS.GetCapabilities",
1697 .op = afs_FS_GetCapabilities,
1698 .deliver = afs_deliver_fs_get_capabilities,
1699 .done = afs_fileserver_probe_result,
1700 .destructor = afs_flat_call_destructor,
1701};
1702
1703/*
1704 * Probe a fileserver for the capabilities that it supports. This RPC can
1705 * reply with up to 196 words. The operation is asynchronous and if we managed
1706 * to allocate a call, true is returned the result is delivered through the
1707 * ->done() - otherwise we return false to indicate we didn't even try.
1708 */
1709bool afs_fs_get_capabilities(struct afs_net *net, struct afs_server *server,
1710 struct afs_addr_cursor *ac, struct key *key)
1711{
1712 struct afs_call *call;
1713 __be32 *bp;
1714
1715 _enter("");
1716
1717 call = afs_alloc_flat_call(net, &afs_RXFSGetCapabilities, 1 * 4, 16 * 4);
1718 if (!call)
1719 return false;
1720
1721 call->key = key;
1722 call->server = afs_use_server(server, afs_server_trace_get_caps);
1723 call->upgrade = true;
1724 call->async = true;
1725 call->max_lifespan = AFS_PROBE_MAX_LIFESPAN;
1726
1727 /* marshall the parameters */
1728 bp = call->request;
1729 *bp++ = htonl(FSGETCAPABILITIES);
1730
1731 trace_afs_make_fs_call(call, NULL);
1732 afs_make_call(ac, call, GFP_NOFS);
1733 afs_put_call(call);
1734 return true;
1735}
1736
1737/*
1738 * Deliver reply data to an FS.InlineBulkStatus call
1739 */
1740static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
1741{
1742 struct afs_operation *op = call->op;
1743 struct afs_status_cb *scb;
1744 const __be32 *bp;
1745 u32 tmp;
1746 int ret;
1747
1748 _enter("{%u}", call->unmarshall);
1749
1750 switch (call->unmarshall) {
1751 case 0:
1752 afs_extract_to_tmp(call);
1753 call->unmarshall++;
1754 fallthrough;
1755
1756 /* Extract the file status count and array in two steps */
1757 case 1:
1758 _debug("extract status count");
1759 ret = afs_extract_data(call, true);
1760 if (ret < 0)
1761 return ret;
1762
1763 tmp = ntohl(call->tmp);
1764 _debug("status count: %u/%u", tmp, op->nr_files);
1765 if (tmp != op->nr_files)
1766 return afs_protocol_error(call, afs_eproto_ibulkst_count);
1767
1768 call->count = 0;
1769 call->unmarshall++;
1770 more_counts:
1771 afs_extract_to_buf(call, 21 * sizeof(__be32));
1772 fallthrough;
1773
1774 case 2:
1775 _debug("extract status array %u", call->count);
1776 ret = afs_extract_data(call, true);
1777 if (ret < 0)
1778 return ret;
1779
1780 switch (call->count) {
1781 case 0:
1782 scb = &op->file[0].scb;
1783 break;
1784 case 1:
1785 scb = &op->file[1].scb;
1786 break;
1787 default:
1788 scb = &op->more_files[call->count - 2].scb;
1789 break;
1790 }
1791
1792 bp = call->buffer;
1793 xdr_decode_AFSFetchStatus(&bp, call, scb);
1794
1795 call->count++;
1796 if (call->count < op->nr_files)
1797 goto more_counts;
1798
1799 call->count = 0;
1800 call->unmarshall++;
1801 afs_extract_to_tmp(call);
1802 fallthrough;
1803
1804 /* Extract the callback count and array in two steps */
1805 case 3:
1806 _debug("extract CB count");
1807 ret = afs_extract_data(call, true);
1808 if (ret < 0)
1809 return ret;
1810
1811 tmp = ntohl(call->tmp);
1812 _debug("CB count: %u", tmp);
1813 if (tmp != op->nr_files)
1814 return afs_protocol_error(call, afs_eproto_ibulkst_cb_count);
1815 call->count = 0;
1816 call->unmarshall++;
1817 more_cbs:
1818 afs_extract_to_buf(call, 3 * sizeof(__be32));
1819 fallthrough;
1820
1821 case 4:
1822 _debug("extract CB array");
1823 ret = afs_extract_data(call, true);
1824 if (ret < 0)
1825 return ret;
1826
1827 _debug("unmarshall CB array");
1828 switch (call->count) {
1829 case 0:
1830 scb = &op->file[0].scb;
1831 break;
1832 case 1:
1833 scb = &op->file[1].scb;
1834 break;
1835 default:
1836 scb = &op->more_files[call->count - 2].scb;
1837 break;
1838 }
1839
1840 bp = call->buffer;
1841 xdr_decode_AFSCallBack(&bp, call, scb);
1842 call->count++;
1843 if (call->count < op->nr_files)
1844 goto more_cbs;
1845
1846 afs_extract_to_buf(call, 6 * sizeof(__be32));
1847 call->unmarshall++;
1848 fallthrough;
1849
1850 case 5:
1851 ret = afs_extract_data(call, false);
1852 if (ret < 0)
1853 return ret;
1854
1855 bp = call->buffer;
1856 xdr_decode_AFSVolSync(&bp, &op->volsync);
1857
1858 call->unmarshall++;
1859 fallthrough;
1860
1861 case 6:
1862 break;
1863 }
1864
1865 _leave(" = 0 [done]");
1866 return 0;
1867}
1868
1869static void afs_done_fs_inline_bulk_status(struct afs_call *call)
1870{
1871 if (call->error == -ECONNABORTED &&
1872 call->abort_code == RX_INVALID_OPERATION) {
1873 set_bit(AFS_SERVER_FL_NO_IBULK, &call->server->flags);
1874 if (call->op)
1875 set_bit(AFS_VOLUME_MAYBE_NO_IBULK, &call->op->volume->flags);
1876 }
1877}
1878
1879/*
1880 * FS.InlineBulkStatus operation type
1881 */
1882static const struct afs_call_type afs_RXFSInlineBulkStatus = {
1883 .name = "FS.InlineBulkStatus",
1884 .op = afs_FS_InlineBulkStatus,
1885 .deliver = afs_deliver_fs_inline_bulk_status,
1886 .done = afs_done_fs_inline_bulk_status,
1887 .destructor = afs_flat_call_destructor,
1888};
1889
1890/*
1891 * Fetch the status information for up to 50 files
1892 */
1893void afs_fs_inline_bulk_status(struct afs_operation *op)
1894{
1895 struct afs_vnode_param *dvp = &op->file[0];
1896 struct afs_vnode_param *vp = &op->file[1];
1897 struct afs_call *call;
1898 __be32 *bp;
1899 int i;
1900
1901 if (test_bit(AFS_SERVER_FL_NO_IBULK, &op->server->flags)) {
1902 op->error = -ENOTSUPP;
1903 return;
1904 }
1905
1906 _enter(",%x,{%llx:%llu},%u",
1907 key_serial(op->key), vp->fid.vid, vp->fid.vnode, op->nr_files);
1908
1909 call = afs_alloc_flat_call(op->net, &afs_RXFSInlineBulkStatus,
1910 (2 + op->nr_files * 3) * 4,
1911 21 * 4);
1912 if (!call)
1913 return afs_op_nomem(op);
1914
1915 /* marshall the parameters */
1916 bp = call->request;
1917 *bp++ = htonl(FSINLINEBULKSTATUS);
1918 *bp++ = htonl(op->nr_files);
1919 *bp++ = htonl(dvp->fid.vid);
1920 *bp++ = htonl(dvp->fid.vnode);
1921 *bp++ = htonl(dvp->fid.unique);
1922 *bp++ = htonl(vp->fid.vid);
1923 *bp++ = htonl(vp->fid.vnode);
1924 *bp++ = htonl(vp->fid.unique);
1925 for (i = 0; i < op->nr_files - 2; i++) {
1926 *bp++ = htonl(op->more_files[i].fid.vid);
1927 *bp++ = htonl(op->more_files[i].fid.vnode);
1928 *bp++ = htonl(op->more_files[i].fid.unique);
1929 }
1930
1931 trace_afs_make_fs_call(call, &vp->fid);
1932 afs_make_op_call(op, call, GFP_NOFS);
1933}
1934
1935/*
1936 * deliver reply data to an FS.FetchACL
1937 */
1938static int afs_deliver_fs_fetch_acl(struct afs_call *call)
1939{
1940 struct afs_operation *op = call->op;
1941 struct afs_vnode_param *vp = &op->file[0];
1942 struct afs_acl *acl;
1943 const __be32 *bp;
1944 unsigned int size;
1945 int ret;
1946
1947 _enter("{%u}", call->unmarshall);
1948
1949 switch (call->unmarshall) {
1950 case 0:
1951 afs_extract_to_tmp(call);
1952 call->unmarshall++;
1953 fallthrough;
1954
1955 /* extract the returned data length */
1956 case 1:
1957 ret = afs_extract_data(call, true);
1958 if (ret < 0)
1959 return ret;
1960
1961 size = call->count2 = ntohl(call->tmp);
1962 size = round_up(size, 4);
1963
1964 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
1965 if (!acl)
1966 return -ENOMEM;
1967 op->acl = acl;
1968 acl->size = call->count2;
1969 afs_extract_begin(call, acl->data, size);
1970 call->unmarshall++;
1971 fallthrough;
1972
1973 /* extract the returned data */
1974 case 2:
1975 ret = afs_extract_data(call, true);
1976 if (ret < 0)
1977 return ret;
1978
1979 afs_extract_to_buf(call, (21 + 6) * 4);
1980 call->unmarshall++;
1981 fallthrough;
1982
1983 /* extract the metadata */
1984 case 3:
1985 ret = afs_extract_data(call, false);
1986 if (ret < 0)
1987 return ret;
1988
1989 bp = call->buffer;
1990 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
1991 xdr_decode_AFSVolSync(&bp, &op->volsync);
1992
1993 call->unmarshall++;
1994 fallthrough;
1995
1996 case 4:
1997 break;
1998 }
1999
2000 _leave(" = 0 [done]");
2001 return 0;
2002}
2003
2004/*
2005 * FS.FetchACL operation type
2006 */
2007static const struct afs_call_type afs_RXFSFetchACL = {
2008 .name = "FS.FetchACL",
2009 .op = afs_FS_FetchACL,
2010 .deliver = afs_deliver_fs_fetch_acl,
2011};
2012
2013/*
2014 * Fetch the ACL for a file.
2015 */
2016void afs_fs_fetch_acl(struct afs_operation *op)
2017{
2018 struct afs_vnode_param *vp = &op->file[0];
2019 struct afs_call *call;
2020 __be32 *bp;
2021
2022 _enter(",%x,{%llx:%llu},,",
2023 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
2024
2025 call = afs_alloc_flat_call(op->net, &afs_RXFSFetchACL, 16, (21 + 6) * 4);
2026 if (!call)
2027 return afs_op_nomem(op);
2028
2029 /* marshall the parameters */
2030 bp = call->request;
2031 bp[0] = htonl(FSFETCHACL);
2032 bp[1] = htonl(vp->fid.vid);
2033 bp[2] = htonl(vp->fid.vnode);
2034 bp[3] = htonl(vp->fid.unique);
2035
2036 trace_afs_make_fs_call(call, &vp->fid);
2037 afs_make_op_call(op, call, GFP_KERNEL);
2038}
2039
2040/*
2041 * FS.StoreACL operation type
2042 */
2043static const struct afs_call_type afs_RXFSStoreACL = {
2044 .name = "FS.StoreACL",
2045 .op = afs_FS_StoreACL,
2046 .deliver = afs_deliver_fs_file_status_and_vol,
2047 .destructor = afs_flat_call_destructor,
2048};
2049
2050/*
2051 * Fetch the ACL for a file.
2052 */
2053void afs_fs_store_acl(struct afs_operation *op)
2054{
2055 struct afs_vnode_param *vp = &op->file[0];
2056 struct afs_call *call;
2057 const struct afs_acl *acl = op->acl;
2058 size_t size;
2059 __be32 *bp;
2060
2061 _enter(",%x,{%llx:%llu},,",
2062 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
2063
2064 size = round_up(acl->size, 4);
2065 call = afs_alloc_flat_call(op->net, &afs_RXFSStoreACL,
2066 5 * 4 + size, (21 + 6) * 4);
2067 if (!call)
2068 return afs_op_nomem(op);
2069
2070 /* marshall the parameters */
2071 bp = call->request;
2072 bp[0] = htonl(FSSTOREACL);
2073 bp[1] = htonl(vp->fid.vid);
2074 bp[2] = htonl(vp->fid.vnode);
2075 bp[3] = htonl(vp->fid.unique);
2076 bp[4] = htonl(acl->size);
2077 memcpy(&bp[5], acl->data, acl->size);
2078 if (acl->size != size)
2079 memset((void *)&bp[5] + acl->size, 0, size - acl->size);
2080
2081 trace_afs_make_fs_call(call, &vp->fid);
2082 afs_make_op_call(op, call, GFP_KERNEL);
2083}
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 "internal.h"
17#include "afs_fs.h"
18
19/*
20 * decode an AFSFid block
21 */
22static void xdr_decode_AFSFid(const __be32 **_bp, struct afs_fid *fid)
23{
24 const __be32 *bp = *_bp;
25
26 fid->vid = ntohl(*bp++);
27 fid->vnode = ntohl(*bp++);
28 fid->unique = ntohl(*bp++);
29 *_bp = bp;
30}
31
32/*
33 * decode an AFSFetchStatus block
34 */
35static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
36 struct afs_file_status *status,
37 struct afs_vnode *vnode,
38 afs_dataversion_t *store_version)
39{
40 afs_dataversion_t expected_version;
41 const __be32 *bp = *_bp;
42 umode_t mode;
43 u64 data_version, size;
44 u32 changed = 0; /* becomes non-zero if ctime-type changes seen */
45 kuid_t owner;
46 kgid_t group;
47
48#define EXTRACT(DST) \
49 do { \
50 u32 x = ntohl(*bp++); \
51 changed |= DST - x; \
52 DST = x; \
53 } while (0)
54
55 status->if_version = ntohl(*bp++);
56 EXTRACT(status->type);
57 EXTRACT(status->nlink);
58 size = ntohl(*bp++);
59 data_version = ntohl(*bp++);
60 EXTRACT(status->author);
61 owner = make_kuid(&init_user_ns, ntohl(*bp++));
62 changed |= !uid_eq(owner, status->owner);
63 status->owner = owner;
64 EXTRACT(status->caller_access); /* call ticket dependent */
65 EXTRACT(status->anon_access);
66 EXTRACT(status->mode);
67 EXTRACT(status->parent.vnode);
68 EXTRACT(status->parent.unique);
69 bp++; /* seg size */
70 status->mtime_client = ntohl(*bp++);
71 status->mtime_server = ntohl(*bp++);
72 group = make_kgid(&init_user_ns, ntohl(*bp++));
73 changed |= !gid_eq(group, status->group);
74 status->group = group;
75 bp++; /* sync counter */
76 data_version |= (u64) ntohl(*bp++) << 32;
77 EXTRACT(status->lock_count);
78 size |= (u64) ntohl(*bp++) << 32;
79 bp++; /* spare 4 */
80 *_bp = bp;
81
82 if (size != status->size) {
83 status->size = size;
84 changed |= true;
85 }
86 status->mode &= S_IALLUGO;
87
88 _debug("vnode time %lx, %lx",
89 status->mtime_client, status->mtime_server);
90
91 if (vnode) {
92 status->parent.vid = vnode->fid.vid;
93 if (changed && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
94 _debug("vnode changed");
95 i_size_write(&vnode->vfs_inode, size);
96 vnode->vfs_inode.i_uid = status->owner;
97 vnode->vfs_inode.i_gid = status->group;
98 vnode->vfs_inode.i_generation = vnode->fid.unique;
99 set_nlink(&vnode->vfs_inode, status->nlink);
100
101 mode = vnode->vfs_inode.i_mode;
102 mode &= ~S_IALLUGO;
103 mode |= status->mode;
104 barrier();
105 vnode->vfs_inode.i_mode = mode;
106 }
107
108 vnode->vfs_inode.i_ctime.tv_sec = status->mtime_server;
109 vnode->vfs_inode.i_mtime = vnode->vfs_inode.i_ctime;
110 vnode->vfs_inode.i_atime = vnode->vfs_inode.i_ctime;
111 vnode->vfs_inode.i_version = data_version;
112 }
113
114 expected_version = status->data_version;
115 if (store_version)
116 expected_version = *store_version;
117
118 if (expected_version != data_version) {
119 status->data_version = data_version;
120 if (vnode && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
121 _debug("vnode modified %llx on {%x:%u}",
122 (unsigned long long) data_version,
123 vnode->fid.vid, vnode->fid.vnode);
124 set_bit(AFS_VNODE_MODIFIED, &vnode->flags);
125 set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags);
126 }
127 } else if (store_version) {
128 status->data_version = data_version;
129 }
130}
131
132/*
133 * decode an AFSCallBack block
134 */
135static void xdr_decode_AFSCallBack(const __be32 **_bp, struct afs_vnode *vnode)
136{
137 const __be32 *bp = *_bp;
138
139 vnode->cb_version = ntohl(*bp++);
140 vnode->cb_expiry = ntohl(*bp++);
141 vnode->cb_type = ntohl(*bp++);
142 vnode->cb_expires = vnode->cb_expiry + get_seconds();
143 *_bp = bp;
144}
145
146static void xdr_decode_AFSCallBack_raw(const __be32 **_bp,
147 struct afs_callback *cb)
148{
149 const __be32 *bp = *_bp;
150
151 cb->version = ntohl(*bp++);
152 cb->expiry = ntohl(*bp++);
153 cb->type = ntohl(*bp++);
154 *_bp = bp;
155}
156
157/*
158 * decode an AFSVolSync block
159 */
160static void xdr_decode_AFSVolSync(const __be32 **_bp,
161 struct afs_volsync *volsync)
162{
163 const __be32 *bp = *_bp;
164
165 volsync->creation = ntohl(*bp++);
166 bp++; /* spare2 */
167 bp++; /* spare3 */
168 bp++; /* spare4 */
169 bp++; /* spare5 */
170 bp++; /* spare6 */
171 *_bp = bp;
172}
173
174/*
175 * encode the requested attributes into an AFSStoreStatus block
176 */
177static void xdr_encode_AFS_StoreStatus(__be32 **_bp, struct iattr *attr)
178{
179 __be32 *bp = *_bp;
180 u32 mask = 0, mtime = 0, owner = 0, group = 0, mode = 0;
181
182 mask = 0;
183 if (attr->ia_valid & ATTR_MTIME) {
184 mask |= AFS_SET_MTIME;
185 mtime = attr->ia_mtime.tv_sec;
186 }
187
188 if (attr->ia_valid & ATTR_UID) {
189 mask |= AFS_SET_OWNER;
190 owner = from_kuid(&init_user_ns, attr->ia_uid);
191 }
192
193 if (attr->ia_valid & ATTR_GID) {
194 mask |= AFS_SET_GROUP;
195 group = from_kgid(&init_user_ns, attr->ia_gid);
196 }
197
198 if (attr->ia_valid & ATTR_MODE) {
199 mask |= AFS_SET_MODE;
200 mode = attr->ia_mode & S_IALLUGO;
201 }
202
203 *bp++ = htonl(mask);
204 *bp++ = htonl(mtime);
205 *bp++ = htonl(owner);
206 *bp++ = htonl(group);
207 *bp++ = htonl(mode);
208 *bp++ = 0; /* segment size */
209 *_bp = bp;
210}
211
212/*
213 * decode an AFSFetchVolumeStatus block
214 */
215static void xdr_decode_AFSFetchVolumeStatus(const __be32 **_bp,
216 struct afs_volume_status *vs)
217{
218 const __be32 *bp = *_bp;
219
220 vs->vid = ntohl(*bp++);
221 vs->parent_id = ntohl(*bp++);
222 vs->online = ntohl(*bp++);
223 vs->in_service = ntohl(*bp++);
224 vs->blessed = ntohl(*bp++);
225 vs->needs_salvage = ntohl(*bp++);
226 vs->type = ntohl(*bp++);
227 vs->min_quota = ntohl(*bp++);
228 vs->max_quota = ntohl(*bp++);
229 vs->blocks_in_use = ntohl(*bp++);
230 vs->part_blocks_avail = ntohl(*bp++);
231 vs->part_max_blocks = ntohl(*bp++);
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_vnode *vnode = call->reply;
241 const __be32 *bp;
242 int ret;
243
244 _enter("");
245
246 ret = afs_transfer_reply(call);
247 if (ret < 0)
248 return ret;
249
250 /* unmarshall the reply once we've received all of it */
251 bp = call->buffer;
252 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
253 xdr_decode_AFSCallBack(&bp, vnode);
254 if (call->reply2)
255 xdr_decode_AFSVolSync(&bp, call->reply2);
256
257 _leave(" = 0 [done]");
258 return 0;
259}
260
261/*
262 * FS.FetchStatus operation type
263 */
264static const struct afs_call_type afs_RXFSFetchStatus = {
265 .name = "FS.FetchStatus",
266 .deliver = afs_deliver_fs_fetch_status,
267 .abort_to_error = afs_abort_to_error,
268 .destructor = afs_flat_call_destructor,
269};
270
271/*
272 * fetch the status information for a file
273 */
274int afs_fs_fetch_file_status(struct afs_server *server,
275 struct key *key,
276 struct afs_vnode *vnode,
277 struct afs_volsync *volsync,
278 const struct afs_wait_mode *wait_mode)
279{
280 struct afs_call *call;
281 __be32 *bp;
282
283 _enter(",%x,{%x:%u},,",
284 key_serial(key), vnode->fid.vid, vnode->fid.vnode);
285
286 call = afs_alloc_flat_call(&afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4);
287 if (!call)
288 return -ENOMEM;
289
290 call->key = key;
291 call->reply = vnode;
292 call->reply2 = volsync;
293 call->service_id = FS_SERVICE;
294 call->port = htons(AFS_FS_PORT);
295
296 /* marshall the parameters */
297 bp = call->request;
298 bp[0] = htonl(FSFETCHSTATUS);
299 bp[1] = htonl(vnode->fid.vid);
300 bp[2] = htonl(vnode->fid.vnode);
301 bp[3] = htonl(vnode->fid.unique);
302
303 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
304}
305
306/*
307 * deliver reply data to an FS.FetchData
308 */
309static int afs_deliver_fs_fetch_data(struct afs_call *call)
310{
311 struct afs_vnode *vnode = call->reply;
312 const __be32 *bp;
313 struct page *page;
314 void *buffer;
315 int ret;
316
317 _enter("{%u}", call->unmarshall);
318
319 switch (call->unmarshall) {
320 case 0:
321 call->offset = 0;
322 call->unmarshall++;
323 if (call->operation_ID != FSFETCHDATA64) {
324 call->unmarshall++;
325 goto no_msw;
326 }
327
328 /* extract the upper part of the returned data length of an
329 * FSFETCHDATA64 op (which should always be 0 using this
330 * client) */
331 case 1:
332 _debug("extract data length (MSW)");
333 ret = afs_extract_data(call, &call->tmp, 4, true);
334 if (ret < 0)
335 return ret;
336
337 call->count = ntohl(call->tmp);
338 _debug("DATA length MSW: %u", call->count);
339 if (call->count > 0)
340 return -EBADMSG;
341 call->offset = 0;
342 call->unmarshall++;
343
344 no_msw:
345 /* extract the returned data length */
346 case 2:
347 _debug("extract data length");
348 ret = afs_extract_data(call, &call->tmp, 4, true);
349 if (ret < 0)
350 return ret;
351
352 call->count = ntohl(call->tmp);
353 _debug("DATA length: %u", call->count);
354 if (call->count > PAGE_SIZE)
355 return -EBADMSG;
356 call->offset = 0;
357 call->unmarshall++;
358
359 /* extract the returned data */
360 case 3:
361 _debug("extract data");
362 if (call->count > 0) {
363 page = call->reply3;
364 buffer = kmap(page);
365 ret = afs_extract_data(call, buffer,
366 call->count, true);
367 kunmap(page);
368 if (ret < 0)
369 return ret;
370 }
371
372 call->offset = 0;
373 call->unmarshall++;
374
375 /* extract the metadata */
376 case 4:
377 ret = afs_extract_data(call, call->buffer,
378 (21 + 3 + 6) * 4, false);
379 if (ret < 0)
380 return ret;
381
382 bp = call->buffer;
383 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
384 xdr_decode_AFSCallBack(&bp, vnode);
385 if (call->reply2)
386 xdr_decode_AFSVolSync(&bp, call->reply2);
387
388 call->offset = 0;
389 call->unmarshall++;
390
391 case 5:
392 break;
393 }
394
395 if (call->count < PAGE_SIZE) {
396 _debug("clear");
397 page = call->reply3;
398 buffer = kmap(page);
399 memset(buffer + call->count, 0, PAGE_SIZE - call->count);
400 kunmap(page);
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 .deliver = afs_deliver_fs_fetch_data,
413 .abort_to_error = afs_abort_to_error,
414 .destructor = afs_flat_call_destructor,
415};
416
417static const struct afs_call_type afs_RXFSFetchData64 = {
418 .name = "FS.FetchData64",
419 .deliver = afs_deliver_fs_fetch_data,
420 .abort_to_error = afs_abort_to_error,
421 .destructor = afs_flat_call_destructor,
422};
423
424/*
425 * fetch data from a very large file
426 */
427static int afs_fs_fetch_data64(struct afs_server *server,
428 struct key *key,
429 struct afs_vnode *vnode,
430 off_t offset, size_t length,
431 struct page *buffer,
432 const struct afs_wait_mode *wait_mode)
433{
434 struct afs_call *call;
435 __be32 *bp;
436
437 _enter("");
438
439 ASSERTCMP(length, <, ULONG_MAX);
440
441 call = afs_alloc_flat_call(&afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4);
442 if (!call)
443 return -ENOMEM;
444
445 call->key = key;
446 call->reply = vnode;
447 call->reply2 = NULL; /* volsync */
448 call->reply3 = buffer;
449 call->service_id = FS_SERVICE;
450 call->port = htons(AFS_FS_PORT);
451 call->operation_ID = FSFETCHDATA64;
452
453 /* marshall the parameters */
454 bp = call->request;
455 bp[0] = htonl(FSFETCHDATA64);
456 bp[1] = htonl(vnode->fid.vid);
457 bp[2] = htonl(vnode->fid.vnode);
458 bp[3] = htonl(vnode->fid.unique);
459 bp[4] = htonl(upper_32_bits(offset));
460 bp[5] = htonl((u32) offset);
461 bp[6] = 0;
462 bp[7] = htonl((u32) length);
463
464 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
465}
466
467/*
468 * fetch data from a file
469 */
470int afs_fs_fetch_data(struct afs_server *server,
471 struct key *key,
472 struct afs_vnode *vnode,
473 off_t offset, size_t length,
474 struct page *buffer,
475 const struct afs_wait_mode *wait_mode)
476{
477 struct afs_call *call;
478 __be32 *bp;
479
480 if (upper_32_bits(offset) || upper_32_bits(offset + length))
481 return afs_fs_fetch_data64(server, key, vnode, offset, length,
482 buffer, wait_mode);
483
484 _enter("");
485
486 call = afs_alloc_flat_call(&afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
487 if (!call)
488 return -ENOMEM;
489
490 call->key = key;
491 call->reply = vnode;
492 call->reply2 = NULL; /* volsync */
493 call->reply3 = buffer;
494 call->service_id = FS_SERVICE;
495 call->port = htons(AFS_FS_PORT);
496 call->operation_ID = FSFETCHDATA;
497
498 /* marshall the parameters */
499 bp = call->request;
500 bp[0] = htonl(FSFETCHDATA);
501 bp[1] = htonl(vnode->fid.vid);
502 bp[2] = htonl(vnode->fid.vnode);
503 bp[3] = htonl(vnode->fid.unique);
504 bp[4] = htonl(offset);
505 bp[5] = htonl(length);
506
507 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
508}
509
510/*
511 * deliver reply data to an FS.GiveUpCallBacks
512 */
513static int afs_deliver_fs_give_up_callbacks(struct afs_call *call)
514{
515 _enter("");
516
517 /* shouldn't be any reply data */
518 return afs_extract_data(call, NULL, 0, false);
519}
520
521/*
522 * FS.GiveUpCallBacks operation type
523 */
524static const struct afs_call_type afs_RXFSGiveUpCallBacks = {
525 .name = "FS.GiveUpCallBacks",
526 .deliver = afs_deliver_fs_give_up_callbacks,
527 .abort_to_error = afs_abort_to_error,
528 .destructor = afs_flat_call_destructor,
529};
530
531/*
532 * give up a set of callbacks
533 * - the callbacks are held in the server->cb_break ring
534 */
535int afs_fs_give_up_callbacks(struct afs_server *server,
536 const struct afs_wait_mode *wait_mode)
537{
538 struct afs_call *call;
539 size_t ncallbacks;
540 __be32 *bp, *tp;
541 int loop;
542
543 ncallbacks = CIRC_CNT(server->cb_break_head, server->cb_break_tail,
544 ARRAY_SIZE(server->cb_break));
545
546 _enter("{%zu},", ncallbacks);
547
548 if (ncallbacks == 0)
549 return 0;
550 if (ncallbacks > AFSCBMAX)
551 ncallbacks = AFSCBMAX;
552
553 _debug("break %zu callbacks", ncallbacks);
554
555 call = afs_alloc_flat_call(&afs_RXFSGiveUpCallBacks,
556 12 + ncallbacks * 6 * 4, 0);
557 if (!call)
558 return -ENOMEM;
559
560 call->service_id = FS_SERVICE;
561 call->port = htons(AFS_FS_PORT);
562
563 /* marshall the parameters */
564 bp = call->request;
565 tp = bp + 2 + ncallbacks * 3;
566 *bp++ = htonl(FSGIVEUPCALLBACKS);
567 *bp++ = htonl(ncallbacks);
568 *tp++ = htonl(ncallbacks);
569
570 atomic_sub(ncallbacks, &server->cb_break_n);
571 for (loop = ncallbacks; loop > 0; loop--) {
572 struct afs_callback *cb =
573 &server->cb_break[server->cb_break_tail];
574
575 *bp++ = htonl(cb->fid.vid);
576 *bp++ = htonl(cb->fid.vnode);
577 *bp++ = htonl(cb->fid.unique);
578 *tp++ = htonl(cb->version);
579 *tp++ = htonl(cb->expiry);
580 *tp++ = htonl(cb->type);
581 smp_mb();
582 server->cb_break_tail =
583 (server->cb_break_tail + 1) &
584 (ARRAY_SIZE(server->cb_break) - 1);
585 }
586
587 ASSERT(ncallbacks > 0);
588 wake_up_nr(&server->cb_break_waitq, ncallbacks);
589
590 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
591}
592
593/*
594 * deliver reply data to an FS.CreateFile or an FS.MakeDir
595 */
596static int afs_deliver_fs_create_vnode(struct afs_call *call)
597{
598 struct afs_vnode *vnode = call->reply;
599 const __be32 *bp;
600 int ret;
601
602 _enter("{%u}", call->unmarshall);
603
604 ret = afs_transfer_reply(call);
605 if (ret < 0)
606 return ret;
607
608 /* unmarshall the reply once we've received all of it */
609 bp = call->buffer;
610 xdr_decode_AFSFid(&bp, call->reply2);
611 xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL, NULL);
612 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
613 xdr_decode_AFSCallBack_raw(&bp, call->reply4);
614 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
615
616 _leave(" = 0 [done]");
617 return 0;
618}
619
620/*
621 * FS.CreateFile and FS.MakeDir operation type
622 */
623static const struct afs_call_type afs_RXFSCreateXXXX = {
624 .name = "FS.CreateXXXX",
625 .deliver = afs_deliver_fs_create_vnode,
626 .abort_to_error = afs_abort_to_error,
627 .destructor = afs_flat_call_destructor,
628};
629
630/*
631 * create a file or make a directory
632 */
633int afs_fs_create(struct afs_server *server,
634 struct key *key,
635 struct afs_vnode *vnode,
636 const char *name,
637 umode_t mode,
638 struct afs_fid *newfid,
639 struct afs_file_status *newstatus,
640 struct afs_callback *newcb,
641 const struct afs_wait_mode *wait_mode)
642{
643 struct afs_call *call;
644 size_t namesz, reqsz, padsz;
645 __be32 *bp;
646
647 _enter("");
648
649 namesz = strlen(name);
650 padsz = (4 - (namesz & 3)) & 3;
651 reqsz = (5 * 4) + namesz + padsz + (6 * 4);
652
653 call = afs_alloc_flat_call(&afs_RXFSCreateXXXX, reqsz,
654 (3 + 21 + 21 + 3 + 6) * 4);
655 if (!call)
656 return -ENOMEM;
657
658 call->key = key;
659 call->reply = vnode;
660 call->reply2 = newfid;
661 call->reply3 = newstatus;
662 call->reply4 = newcb;
663 call->service_id = FS_SERVICE;
664 call->port = htons(AFS_FS_PORT);
665
666 /* marshall the parameters */
667 bp = call->request;
668 *bp++ = htonl(S_ISDIR(mode) ? FSMAKEDIR : FSCREATEFILE);
669 *bp++ = htonl(vnode->fid.vid);
670 *bp++ = htonl(vnode->fid.vnode);
671 *bp++ = htonl(vnode->fid.unique);
672 *bp++ = htonl(namesz);
673 memcpy(bp, name, namesz);
674 bp = (void *) bp + namesz;
675 if (padsz > 0) {
676 memset(bp, 0, padsz);
677 bp = (void *) bp + padsz;
678 }
679 *bp++ = htonl(AFS_SET_MODE);
680 *bp++ = 0; /* mtime */
681 *bp++ = 0; /* owner */
682 *bp++ = 0; /* group */
683 *bp++ = htonl(mode & S_IALLUGO); /* unix mode */
684 *bp++ = 0; /* segment size */
685
686 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
687}
688
689/*
690 * deliver reply data to an FS.RemoveFile or FS.RemoveDir
691 */
692static int afs_deliver_fs_remove(struct afs_call *call)
693{
694 struct afs_vnode *vnode = call->reply;
695 const __be32 *bp;
696 int ret;
697
698 _enter("{%u}", call->unmarshall);
699
700 ret = afs_transfer_reply(call);
701 if (ret < 0)
702 return ret;
703
704 /* unmarshall the reply once we've received all of it */
705 bp = call->buffer;
706 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
707 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
708
709 _leave(" = 0 [done]");
710 return 0;
711}
712
713/*
714 * FS.RemoveDir/FS.RemoveFile operation type
715 */
716static const struct afs_call_type afs_RXFSRemoveXXXX = {
717 .name = "FS.RemoveXXXX",
718 .deliver = afs_deliver_fs_remove,
719 .abort_to_error = afs_abort_to_error,
720 .destructor = afs_flat_call_destructor,
721};
722
723/*
724 * remove a file or directory
725 */
726int afs_fs_remove(struct afs_server *server,
727 struct key *key,
728 struct afs_vnode *vnode,
729 const char *name,
730 bool isdir,
731 const struct afs_wait_mode *wait_mode)
732{
733 struct afs_call *call;
734 size_t namesz, reqsz, padsz;
735 __be32 *bp;
736
737 _enter("");
738
739 namesz = strlen(name);
740 padsz = (4 - (namesz & 3)) & 3;
741 reqsz = (5 * 4) + namesz + padsz;
742
743 call = afs_alloc_flat_call(&afs_RXFSRemoveXXXX, reqsz, (21 + 6) * 4);
744 if (!call)
745 return -ENOMEM;
746
747 call->key = key;
748 call->reply = vnode;
749 call->service_id = FS_SERVICE;
750 call->port = htons(AFS_FS_PORT);
751
752 /* marshall the parameters */
753 bp = call->request;
754 *bp++ = htonl(isdir ? FSREMOVEDIR : FSREMOVEFILE);
755 *bp++ = htonl(vnode->fid.vid);
756 *bp++ = htonl(vnode->fid.vnode);
757 *bp++ = htonl(vnode->fid.unique);
758 *bp++ = htonl(namesz);
759 memcpy(bp, name, namesz);
760 bp = (void *) bp + namesz;
761 if (padsz > 0) {
762 memset(bp, 0, padsz);
763 bp = (void *) bp + padsz;
764 }
765
766 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
767}
768
769/*
770 * deliver reply data to an FS.Link
771 */
772static int afs_deliver_fs_link(struct afs_call *call)
773{
774 struct afs_vnode *dvnode = call->reply, *vnode = call->reply2;
775 const __be32 *bp;
776 int ret;
777
778 _enter("{%u}", call->unmarshall);
779
780 ret = afs_transfer_reply(call);
781 if (ret < 0)
782 return ret;
783
784 /* unmarshall the reply once we've received all of it */
785 bp = call->buffer;
786 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
787 xdr_decode_AFSFetchStatus(&bp, &dvnode->status, dvnode, NULL);
788 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
789
790 _leave(" = 0 [done]");
791 return 0;
792}
793
794/*
795 * FS.Link operation type
796 */
797static const struct afs_call_type afs_RXFSLink = {
798 .name = "FS.Link",
799 .deliver = afs_deliver_fs_link,
800 .abort_to_error = afs_abort_to_error,
801 .destructor = afs_flat_call_destructor,
802};
803
804/*
805 * make a hard link
806 */
807int afs_fs_link(struct afs_server *server,
808 struct key *key,
809 struct afs_vnode *dvnode,
810 struct afs_vnode *vnode,
811 const char *name,
812 const struct afs_wait_mode *wait_mode)
813{
814 struct afs_call *call;
815 size_t namesz, reqsz, padsz;
816 __be32 *bp;
817
818 _enter("");
819
820 namesz = strlen(name);
821 padsz = (4 - (namesz & 3)) & 3;
822 reqsz = (5 * 4) + namesz + padsz + (3 * 4);
823
824 call = afs_alloc_flat_call(&afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
825 if (!call)
826 return -ENOMEM;
827
828 call->key = key;
829 call->reply = dvnode;
830 call->reply2 = vnode;
831 call->service_id = FS_SERVICE;
832 call->port = htons(AFS_FS_PORT);
833
834 /* marshall the parameters */
835 bp = call->request;
836 *bp++ = htonl(FSLINK);
837 *bp++ = htonl(dvnode->fid.vid);
838 *bp++ = htonl(dvnode->fid.vnode);
839 *bp++ = htonl(dvnode->fid.unique);
840 *bp++ = htonl(namesz);
841 memcpy(bp, name, namesz);
842 bp = (void *) bp + namesz;
843 if (padsz > 0) {
844 memset(bp, 0, padsz);
845 bp = (void *) bp + padsz;
846 }
847 *bp++ = htonl(vnode->fid.vid);
848 *bp++ = htonl(vnode->fid.vnode);
849 *bp++ = htonl(vnode->fid.unique);
850
851 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
852}
853
854/*
855 * deliver reply data to an FS.Symlink
856 */
857static int afs_deliver_fs_symlink(struct afs_call *call)
858{
859 struct afs_vnode *vnode = call->reply;
860 const __be32 *bp;
861 int ret;
862
863 _enter("{%u}", call->unmarshall);
864
865 ret = afs_transfer_reply(call);
866 if (ret < 0)
867 return ret;
868
869 /* unmarshall the reply once we've received all of it */
870 bp = call->buffer;
871 xdr_decode_AFSFid(&bp, call->reply2);
872 xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL, NULL);
873 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
874 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
875
876 _leave(" = 0 [done]");
877 return 0;
878}
879
880/*
881 * FS.Symlink operation type
882 */
883static const struct afs_call_type afs_RXFSSymlink = {
884 .name = "FS.Symlink",
885 .deliver = afs_deliver_fs_symlink,
886 .abort_to_error = afs_abort_to_error,
887 .destructor = afs_flat_call_destructor,
888};
889
890/*
891 * create a symbolic link
892 */
893int afs_fs_symlink(struct afs_server *server,
894 struct key *key,
895 struct afs_vnode *vnode,
896 const char *name,
897 const char *contents,
898 struct afs_fid *newfid,
899 struct afs_file_status *newstatus,
900 const struct afs_wait_mode *wait_mode)
901{
902 struct afs_call *call;
903 size_t namesz, reqsz, padsz, c_namesz, c_padsz;
904 __be32 *bp;
905
906 _enter("");
907
908 namesz = strlen(name);
909 padsz = (4 - (namesz & 3)) & 3;
910
911 c_namesz = strlen(contents);
912 c_padsz = (4 - (c_namesz & 3)) & 3;
913
914 reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4);
915
916 call = afs_alloc_flat_call(&afs_RXFSSymlink, reqsz,
917 (3 + 21 + 21 + 6) * 4);
918 if (!call)
919 return -ENOMEM;
920
921 call->key = key;
922 call->reply = vnode;
923 call->reply2 = newfid;
924 call->reply3 = newstatus;
925 call->service_id = FS_SERVICE;
926 call->port = htons(AFS_FS_PORT);
927
928 /* marshall the parameters */
929 bp = call->request;
930 *bp++ = htonl(FSSYMLINK);
931 *bp++ = htonl(vnode->fid.vid);
932 *bp++ = htonl(vnode->fid.vnode);
933 *bp++ = htonl(vnode->fid.unique);
934 *bp++ = htonl(namesz);
935 memcpy(bp, name, namesz);
936 bp = (void *) bp + namesz;
937 if (padsz > 0) {
938 memset(bp, 0, padsz);
939 bp = (void *) bp + padsz;
940 }
941 *bp++ = htonl(c_namesz);
942 memcpy(bp, contents, c_namesz);
943 bp = (void *) bp + c_namesz;
944 if (c_padsz > 0) {
945 memset(bp, 0, c_padsz);
946 bp = (void *) bp + c_padsz;
947 }
948 *bp++ = htonl(AFS_SET_MODE);
949 *bp++ = 0; /* mtime */
950 *bp++ = 0; /* owner */
951 *bp++ = 0; /* group */
952 *bp++ = htonl(S_IRWXUGO); /* unix mode */
953 *bp++ = 0; /* segment size */
954
955 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
956}
957
958/*
959 * deliver reply data to an FS.Rename
960 */
961static int afs_deliver_fs_rename(struct afs_call *call)
962{
963 struct afs_vnode *orig_dvnode = call->reply, *new_dvnode = call->reply2;
964 const __be32 *bp;
965 int ret;
966
967 _enter("{%u}", call->unmarshall);
968
969 ret = afs_transfer_reply(call);
970 if (ret < 0)
971 return ret;
972
973 /* unmarshall the reply once we've received all of it */
974 bp = call->buffer;
975 xdr_decode_AFSFetchStatus(&bp, &orig_dvnode->status, orig_dvnode, NULL);
976 if (new_dvnode != orig_dvnode)
977 xdr_decode_AFSFetchStatus(&bp, &new_dvnode->status, new_dvnode,
978 NULL);
979 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
980
981 _leave(" = 0 [done]");
982 return 0;
983}
984
985/*
986 * FS.Rename operation type
987 */
988static const struct afs_call_type afs_RXFSRename = {
989 .name = "FS.Rename",
990 .deliver = afs_deliver_fs_rename,
991 .abort_to_error = afs_abort_to_error,
992 .destructor = afs_flat_call_destructor,
993};
994
995/*
996 * create a symbolic link
997 */
998int afs_fs_rename(struct afs_server *server,
999 struct key *key,
1000 struct afs_vnode *orig_dvnode,
1001 const char *orig_name,
1002 struct afs_vnode *new_dvnode,
1003 const char *new_name,
1004 const struct afs_wait_mode *wait_mode)
1005{
1006 struct afs_call *call;
1007 size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz;
1008 __be32 *bp;
1009
1010 _enter("");
1011
1012 o_namesz = strlen(orig_name);
1013 o_padsz = (4 - (o_namesz & 3)) & 3;
1014
1015 n_namesz = strlen(new_name);
1016 n_padsz = (4 - (n_namesz & 3)) & 3;
1017
1018 reqsz = (4 * 4) +
1019 4 + o_namesz + o_padsz +
1020 (3 * 4) +
1021 4 + n_namesz + n_padsz;
1022
1023 call = afs_alloc_flat_call(&afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
1024 if (!call)
1025 return -ENOMEM;
1026
1027 call->key = key;
1028 call->reply = orig_dvnode;
1029 call->reply2 = new_dvnode;
1030 call->service_id = FS_SERVICE;
1031 call->port = htons(AFS_FS_PORT);
1032
1033 /* marshall the parameters */
1034 bp = call->request;
1035 *bp++ = htonl(FSRENAME);
1036 *bp++ = htonl(orig_dvnode->fid.vid);
1037 *bp++ = htonl(orig_dvnode->fid.vnode);
1038 *bp++ = htonl(orig_dvnode->fid.unique);
1039 *bp++ = htonl(o_namesz);
1040 memcpy(bp, orig_name, o_namesz);
1041 bp = (void *) bp + o_namesz;
1042 if (o_padsz > 0) {
1043 memset(bp, 0, o_padsz);
1044 bp = (void *) bp + o_padsz;
1045 }
1046
1047 *bp++ = htonl(new_dvnode->fid.vid);
1048 *bp++ = htonl(new_dvnode->fid.vnode);
1049 *bp++ = htonl(new_dvnode->fid.unique);
1050 *bp++ = htonl(n_namesz);
1051 memcpy(bp, new_name, n_namesz);
1052 bp = (void *) bp + n_namesz;
1053 if (n_padsz > 0) {
1054 memset(bp, 0, n_padsz);
1055 bp = (void *) bp + n_padsz;
1056 }
1057
1058 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1059}
1060
1061/*
1062 * deliver reply data to an FS.StoreData
1063 */
1064static int afs_deliver_fs_store_data(struct afs_call *call)
1065{
1066 struct afs_vnode *vnode = call->reply;
1067 const __be32 *bp;
1068 int ret;
1069
1070 _enter("");
1071
1072 ret = afs_transfer_reply(call);
1073 if (ret < 0)
1074 return ret;
1075
1076 /* unmarshall the reply once we've received all of it */
1077 bp = call->buffer;
1078 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
1079 &call->store_version);
1080 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
1081
1082 afs_pages_written_back(vnode, call);
1083
1084 _leave(" = 0 [done]");
1085 return 0;
1086}
1087
1088/*
1089 * FS.StoreData operation type
1090 */
1091static const struct afs_call_type afs_RXFSStoreData = {
1092 .name = "FS.StoreData",
1093 .deliver = afs_deliver_fs_store_data,
1094 .abort_to_error = afs_abort_to_error,
1095 .destructor = afs_flat_call_destructor,
1096};
1097
1098static const struct afs_call_type afs_RXFSStoreData64 = {
1099 .name = "FS.StoreData64",
1100 .deliver = afs_deliver_fs_store_data,
1101 .abort_to_error = afs_abort_to_error,
1102 .destructor = afs_flat_call_destructor,
1103};
1104
1105/*
1106 * store a set of pages to a very large file
1107 */
1108static int afs_fs_store_data64(struct afs_server *server,
1109 struct afs_writeback *wb,
1110 pgoff_t first, pgoff_t last,
1111 unsigned offset, unsigned to,
1112 loff_t size, loff_t pos, loff_t i_size,
1113 const struct afs_wait_mode *wait_mode)
1114{
1115 struct afs_vnode *vnode = wb->vnode;
1116 struct afs_call *call;
1117 __be32 *bp;
1118
1119 _enter(",%x,{%x:%u},,",
1120 key_serial(wb->key), vnode->fid.vid, vnode->fid.vnode);
1121
1122 call = afs_alloc_flat_call(&afs_RXFSStoreData64,
1123 (4 + 6 + 3 * 2) * 4,
1124 (21 + 6) * 4);
1125 if (!call)
1126 return -ENOMEM;
1127
1128 call->wb = wb;
1129 call->key = wb->key;
1130 call->reply = vnode;
1131 call->service_id = FS_SERVICE;
1132 call->port = htons(AFS_FS_PORT);
1133 call->mapping = vnode->vfs_inode.i_mapping;
1134 call->first = first;
1135 call->last = last;
1136 call->first_offset = offset;
1137 call->last_to = to;
1138 call->send_pages = true;
1139 call->store_version = vnode->status.data_version + 1;
1140
1141 /* marshall the parameters */
1142 bp = call->request;
1143 *bp++ = htonl(FSSTOREDATA64);
1144 *bp++ = htonl(vnode->fid.vid);
1145 *bp++ = htonl(vnode->fid.vnode);
1146 *bp++ = htonl(vnode->fid.unique);
1147
1148 *bp++ = 0; /* mask */
1149 *bp++ = 0; /* mtime */
1150 *bp++ = 0; /* owner */
1151 *bp++ = 0; /* group */
1152 *bp++ = 0; /* unix mode */
1153 *bp++ = 0; /* segment size */
1154
1155 *bp++ = htonl(pos >> 32);
1156 *bp++ = htonl((u32) pos);
1157 *bp++ = htonl(size >> 32);
1158 *bp++ = htonl((u32) size);
1159 *bp++ = htonl(i_size >> 32);
1160 *bp++ = htonl((u32) i_size);
1161
1162 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1163}
1164
1165/*
1166 * store a set of pages
1167 */
1168int afs_fs_store_data(struct afs_server *server, struct afs_writeback *wb,
1169 pgoff_t first, pgoff_t last,
1170 unsigned offset, unsigned to,
1171 const struct afs_wait_mode *wait_mode)
1172{
1173 struct afs_vnode *vnode = wb->vnode;
1174 struct afs_call *call;
1175 loff_t size, pos, i_size;
1176 __be32 *bp;
1177
1178 _enter(",%x,{%x:%u},,",
1179 key_serial(wb->key), vnode->fid.vid, vnode->fid.vnode);
1180
1181 size = to - offset;
1182 if (first != last)
1183 size += (loff_t)(last - first) << PAGE_SHIFT;
1184 pos = (loff_t)first << PAGE_SHIFT;
1185 pos += offset;
1186
1187 i_size = i_size_read(&vnode->vfs_inode);
1188 if (pos + size > i_size)
1189 i_size = size + pos;
1190
1191 _debug("size %llx, at %llx, i_size %llx",
1192 (unsigned long long) size, (unsigned long long) pos,
1193 (unsigned long long) i_size);
1194
1195 if (pos >> 32 || i_size >> 32 || size >> 32 || (pos + size) >> 32)
1196 return afs_fs_store_data64(server, wb, first, last, offset, to,
1197 size, pos, i_size, wait_mode);
1198
1199 call = afs_alloc_flat_call(&afs_RXFSStoreData,
1200 (4 + 6 + 3) * 4,
1201 (21 + 6) * 4);
1202 if (!call)
1203 return -ENOMEM;
1204
1205 call->wb = wb;
1206 call->key = wb->key;
1207 call->reply = vnode;
1208 call->service_id = FS_SERVICE;
1209 call->port = htons(AFS_FS_PORT);
1210 call->mapping = vnode->vfs_inode.i_mapping;
1211 call->first = first;
1212 call->last = last;
1213 call->first_offset = offset;
1214 call->last_to = to;
1215 call->send_pages = true;
1216 call->store_version = vnode->status.data_version + 1;
1217
1218 /* marshall the parameters */
1219 bp = call->request;
1220 *bp++ = htonl(FSSTOREDATA);
1221 *bp++ = htonl(vnode->fid.vid);
1222 *bp++ = htonl(vnode->fid.vnode);
1223 *bp++ = htonl(vnode->fid.unique);
1224
1225 *bp++ = 0; /* mask */
1226 *bp++ = 0; /* mtime */
1227 *bp++ = 0; /* owner */
1228 *bp++ = 0; /* group */
1229 *bp++ = 0; /* unix mode */
1230 *bp++ = 0; /* segment size */
1231
1232 *bp++ = htonl(pos);
1233 *bp++ = htonl(size);
1234 *bp++ = htonl(i_size);
1235
1236 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1237}
1238
1239/*
1240 * deliver reply data to an FS.StoreStatus
1241 */
1242static int afs_deliver_fs_store_status(struct afs_call *call)
1243{
1244 afs_dataversion_t *store_version;
1245 struct afs_vnode *vnode = call->reply;
1246 const __be32 *bp;
1247 int ret;
1248
1249 _enter("");
1250
1251 ret = afs_transfer_reply(call);
1252 if (ret < 0)
1253 return ret;
1254
1255 /* unmarshall the reply once we've received all of it */
1256 store_version = NULL;
1257 if (call->operation_ID == FSSTOREDATA)
1258 store_version = &call->store_version;
1259
1260 bp = call->buffer;
1261 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, store_version);
1262 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
1263
1264 _leave(" = 0 [done]");
1265 return 0;
1266}
1267
1268/*
1269 * FS.StoreStatus operation type
1270 */
1271static const struct afs_call_type afs_RXFSStoreStatus = {
1272 .name = "FS.StoreStatus",
1273 .deliver = afs_deliver_fs_store_status,
1274 .abort_to_error = afs_abort_to_error,
1275 .destructor = afs_flat_call_destructor,
1276};
1277
1278static const struct afs_call_type afs_RXFSStoreData_as_Status = {
1279 .name = "FS.StoreData",
1280 .deliver = afs_deliver_fs_store_status,
1281 .abort_to_error = afs_abort_to_error,
1282 .destructor = afs_flat_call_destructor,
1283};
1284
1285static const struct afs_call_type afs_RXFSStoreData64_as_Status = {
1286 .name = "FS.StoreData64",
1287 .deliver = afs_deliver_fs_store_status,
1288 .abort_to_error = afs_abort_to_error,
1289 .destructor = afs_flat_call_destructor,
1290};
1291
1292/*
1293 * set the attributes on a very large file, using FS.StoreData rather than
1294 * FS.StoreStatus so as to alter the file size also
1295 */
1296static int afs_fs_setattr_size64(struct afs_server *server, struct key *key,
1297 struct afs_vnode *vnode, struct iattr *attr,
1298 const struct afs_wait_mode *wait_mode)
1299{
1300 struct afs_call *call;
1301 __be32 *bp;
1302
1303 _enter(",%x,{%x:%u},,",
1304 key_serial(key), vnode->fid.vid, vnode->fid.vnode);
1305
1306 ASSERT(attr->ia_valid & ATTR_SIZE);
1307
1308 call = afs_alloc_flat_call(&afs_RXFSStoreData64_as_Status,
1309 (4 + 6 + 3 * 2) * 4,
1310 (21 + 6) * 4);
1311 if (!call)
1312 return -ENOMEM;
1313
1314 call->key = key;
1315 call->reply = vnode;
1316 call->service_id = FS_SERVICE;
1317 call->port = htons(AFS_FS_PORT);
1318 call->store_version = vnode->status.data_version + 1;
1319 call->operation_ID = FSSTOREDATA;
1320
1321 /* marshall the parameters */
1322 bp = call->request;
1323 *bp++ = htonl(FSSTOREDATA64);
1324 *bp++ = htonl(vnode->fid.vid);
1325 *bp++ = htonl(vnode->fid.vnode);
1326 *bp++ = htonl(vnode->fid.unique);
1327
1328 xdr_encode_AFS_StoreStatus(&bp, attr);
1329
1330 *bp++ = 0; /* position of start of write */
1331 *bp++ = 0;
1332 *bp++ = 0; /* size of write */
1333 *bp++ = 0;
1334 *bp++ = htonl(attr->ia_size >> 32); /* new file length */
1335 *bp++ = htonl((u32) attr->ia_size);
1336
1337 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1338}
1339
1340/*
1341 * set the attributes on a file, using FS.StoreData rather than FS.StoreStatus
1342 * so as to alter the file size also
1343 */
1344static int afs_fs_setattr_size(struct afs_server *server, struct key *key,
1345 struct afs_vnode *vnode, struct iattr *attr,
1346 const struct afs_wait_mode *wait_mode)
1347{
1348 struct afs_call *call;
1349 __be32 *bp;
1350
1351 _enter(",%x,{%x:%u},,",
1352 key_serial(key), vnode->fid.vid, vnode->fid.vnode);
1353
1354 ASSERT(attr->ia_valid & ATTR_SIZE);
1355 if (attr->ia_size >> 32)
1356 return afs_fs_setattr_size64(server, key, vnode, attr,
1357 wait_mode);
1358
1359 call = afs_alloc_flat_call(&afs_RXFSStoreData_as_Status,
1360 (4 + 6 + 3) * 4,
1361 (21 + 6) * 4);
1362 if (!call)
1363 return -ENOMEM;
1364
1365 call->key = key;
1366 call->reply = vnode;
1367 call->service_id = FS_SERVICE;
1368 call->port = htons(AFS_FS_PORT);
1369 call->store_version = vnode->status.data_version + 1;
1370 call->operation_ID = FSSTOREDATA;
1371
1372 /* marshall the parameters */
1373 bp = call->request;
1374 *bp++ = htonl(FSSTOREDATA);
1375 *bp++ = htonl(vnode->fid.vid);
1376 *bp++ = htonl(vnode->fid.vnode);
1377 *bp++ = htonl(vnode->fid.unique);
1378
1379 xdr_encode_AFS_StoreStatus(&bp, attr);
1380
1381 *bp++ = 0; /* position of start of write */
1382 *bp++ = 0; /* size of write */
1383 *bp++ = htonl(attr->ia_size); /* new file length */
1384
1385 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1386}
1387
1388/*
1389 * set the attributes on a file, using FS.StoreData if there's a change in file
1390 * size, and FS.StoreStatus otherwise
1391 */
1392int afs_fs_setattr(struct afs_server *server, struct key *key,
1393 struct afs_vnode *vnode, struct iattr *attr,
1394 const struct afs_wait_mode *wait_mode)
1395{
1396 struct afs_call *call;
1397 __be32 *bp;
1398
1399 if (attr->ia_valid & ATTR_SIZE)
1400 return afs_fs_setattr_size(server, key, vnode, attr,
1401 wait_mode);
1402
1403 _enter(",%x,{%x:%u},,",
1404 key_serial(key), vnode->fid.vid, vnode->fid.vnode);
1405
1406 call = afs_alloc_flat_call(&afs_RXFSStoreStatus,
1407 (4 + 6) * 4,
1408 (21 + 6) * 4);
1409 if (!call)
1410 return -ENOMEM;
1411
1412 call->key = key;
1413 call->reply = vnode;
1414 call->service_id = FS_SERVICE;
1415 call->port = htons(AFS_FS_PORT);
1416 call->operation_ID = FSSTORESTATUS;
1417
1418 /* marshall the parameters */
1419 bp = call->request;
1420 *bp++ = htonl(FSSTORESTATUS);
1421 *bp++ = htonl(vnode->fid.vid);
1422 *bp++ = htonl(vnode->fid.vnode);
1423 *bp++ = htonl(vnode->fid.unique);
1424
1425 xdr_encode_AFS_StoreStatus(&bp, attr);
1426
1427 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1428}
1429
1430/*
1431 * deliver reply data to an FS.GetVolumeStatus
1432 */
1433static int afs_deliver_fs_get_volume_status(struct afs_call *call)
1434{
1435 const __be32 *bp;
1436 char *p;
1437 int ret;
1438
1439 _enter("{%u}", call->unmarshall);
1440
1441 switch (call->unmarshall) {
1442 case 0:
1443 call->offset = 0;
1444 call->unmarshall++;
1445
1446 /* extract the returned status record */
1447 case 1:
1448 _debug("extract status");
1449 ret = afs_extract_data(call, call->buffer,
1450 12 * 4, true);
1451 if (ret < 0)
1452 return ret;
1453
1454 bp = call->buffer;
1455 xdr_decode_AFSFetchVolumeStatus(&bp, call->reply2);
1456 call->offset = 0;
1457 call->unmarshall++;
1458
1459 /* extract the volume name length */
1460 case 2:
1461 ret = afs_extract_data(call, &call->tmp, 4, true);
1462 if (ret < 0)
1463 return ret;
1464
1465 call->count = ntohl(call->tmp);
1466 _debug("volname length: %u", call->count);
1467 if (call->count >= AFSNAMEMAX)
1468 return -EBADMSG;
1469 call->offset = 0;
1470 call->unmarshall++;
1471
1472 /* extract the volume name */
1473 case 3:
1474 _debug("extract volname");
1475 if (call->count > 0) {
1476 ret = afs_extract_data(call, call->reply3,
1477 call->count, true);
1478 if (ret < 0)
1479 return ret;
1480 }
1481
1482 p = call->reply3;
1483 p[call->count] = 0;
1484 _debug("volname '%s'", p);
1485
1486 call->offset = 0;
1487 call->unmarshall++;
1488
1489 /* extract the volume name padding */
1490 if ((call->count & 3) == 0) {
1491 call->unmarshall++;
1492 goto no_volname_padding;
1493 }
1494 call->count = 4 - (call->count & 3);
1495
1496 case 4:
1497 ret = afs_extract_data(call, call->buffer,
1498 call->count, true);
1499 if (ret < 0)
1500 return ret;
1501
1502 call->offset = 0;
1503 call->unmarshall++;
1504 no_volname_padding:
1505
1506 /* extract the offline message length */
1507 case 5:
1508 ret = afs_extract_data(call, &call->tmp, 4, true);
1509 if (ret < 0)
1510 return ret;
1511
1512 call->count = ntohl(call->tmp);
1513 _debug("offline msg length: %u", call->count);
1514 if (call->count >= AFSNAMEMAX)
1515 return -EBADMSG;
1516 call->offset = 0;
1517 call->unmarshall++;
1518
1519 /* extract the offline message */
1520 case 6:
1521 _debug("extract offline");
1522 if (call->count > 0) {
1523 ret = afs_extract_data(call, call->reply3,
1524 call->count, true);
1525 if (ret < 0)
1526 return ret;
1527 }
1528
1529 p = call->reply3;
1530 p[call->count] = 0;
1531 _debug("offline '%s'", p);
1532
1533 call->offset = 0;
1534 call->unmarshall++;
1535
1536 /* extract the offline message padding */
1537 if ((call->count & 3) == 0) {
1538 call->unmarshall++;
1539 goto no_offline_padding;
1540 }
1541 call->count = 4 - (call->count & 3);
1542
1543 case 7:
1544 ret = afs_extract_data(call, call->buffer,
1545 call->count, true);
1546 if (ret < 0)
1547 return ret;
1548
1549 call->offset = 0;
1550 call->unmarshall++;
1551 no_offline_padding:
1552
1553 /* extract the message of the day length */
1554 case 8:
1555 ret = afs_extract_data(call, &call->tmp, 4, true);
1556 if (ret < 0)
1557 return ret;
1558
1559 call->count = ntohl(call->tmp);
1560 _debug("motd length: %u", call->count);
1561 if (call->count >= AFSNAMEMAX)
1562 return -EBADMSG;
1563 call->offset = 0;
1564 call->unmarshall++;
1565
1566 /* extract the message of the day */
1567 case 9:
1568 _debug("extract motd");
1569 if (call->count > 0) {
1570 ret = afs_extract_data(call, call->reply3,
1571 call->count, true);
1572 if (ret < 0)
1573 return ret;
1574 }
1575
1576 p = call->reply3;
1577 p[call->count] = 0;
1578 _debug("motd '%s'", p);
1579
1580 call->offset = 0;
1581 call->unmarshall++;
1582
1583 /* extract the message of the day padding */
1584 call->count = (4 - (call->count & 3)) & 3;
1585
1586 case 10:
1587 ret = afs_extract_data(call, call->buffer,
1588 call->count, false);
1589 if (ret < 0)
1590 return ret;
1591
1592 call->offset = 0;
1593 call->unmarshall++;
1594 case 11:
1595 break;
1596 }
1597
1598 _leave(" = 0 [done]");
1599 return 0;
1600}
1601
1602/*
1603 * destroy an FS.GetVolumeStatus call
1604 */
1605static void afs_get_volume_status_call_destructor(struct afs_call *call)
1606{
1607 kfree(call->reply3);
1608 call->reply3 = NULL;
1609 afs_flat_call_destructor(call);
1610}
1611
1612/*
1613 * FS.GetVolumeStatus operation type
1614 */
1615static const struct afs_call_type afs_RXFSGetVolumeStatus = {
1616 .name = "FS.GetVolumeStatus",
1617 .deliver = afs_deliver_fs_get_volume_status,
1618 .abort_to_error = afs_abort_to_error,
1619 .destructor = afs_get_volume_status_call_destructor,
1620};
1621
1622/*
1623 * fetch the status of a volume
1624 */
1625int afs_fs_get_volume_status(struct afs_server *server,
1626 struct key *key,
1627 struct afs_vnode *vnode,
1628 struct afs_volume_status *vs,
1629 const struct afs_wait_mode *wait_mode)
1630{
1631 struct afs_call *call;
1632 __be32 *bp;
1633 void *tmpbuf;
1634
1635 _enter("");
1636
1637 tmpbuf = kmalloc(AFSOPAQUEMAX, GFP_KERNEL);
1638 if (!tmpbuf)
1639 return -ENOMEM;
1640
1641 call = afs_alloc_flat_call(&afs_RXFSGetVolumeStatus, 2 * 4, 12 * 4);
1642 if (!call) {
1643 kfree(tmpbuf);
1644 return -ENOMEM;
1645 }
1646
1647 call->key = key;
1648 call->reply = vnode;
1649 call->reply2 = vs;
1650 call->reply3 = tmpbuf;
1651 call->service_id = FS_SERVICE;
1652 call->port = htons(AFS_FS_PORT);
1653
1654 /* marshall the parameters */
1655 bp = call->request;
1656 bp[0] = htonl(FSGETVOLUMESTATUS);
1657 bp[1] = htonl(vnode->fid.vid);
1658
1659 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1660}
1661
1662/*
1663 * deliver reply data to an FS.SetLock, FS.ExtendLock or FS.ReleaseLock
1664 */
1665static int afs_deliver_fs_xxxx_lock(struct afs_call *call)
1666{
1667 const __be32 *bp;
1668 int ret;
1669
1670 _enter("{%u}", call->unmarshall);
1671
1672 ret = afs_transfer_reply(call);
1673 if (ret < 0)
1674 return ret;
1675
1676 /* unmarshall the reply once we've received all of it */
1677 bp = call->buffer;
1678 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
1679
1680 _leave(" = 0 [done]");
1681 return 0;
1682}
1683
1684/*
1685 * FS.SetLock operation type
1686 */
1687static const struct afs_call_type afs_RXFSSetLock = {
1688 .name = "FS.SetLock",
1689 .deliver = afs_deliver_fs_xxxx_lock,
1690 .abort_to_error = afs_abort_to_error,
1691 .destructor = afs_flat_call_destructor,
1692};
1693
1694/*
1695 * FS.ExtendLock operation type
1696 */
1697static const struct afs_call_type afs_RXFSExtendLock = {
1698 .name = "FS.ExtendLock",
1699 .deliver = afs_deliver_fs_xxxx_lock,
1700 .abort_to_error = afs_abort_to_error,
1701 .destructor = afs_flat_call_destructor,
1702};
1703
1704/*
1705 * FS.ReleaseLock operation type
1706 */
1707static const struct afs_call_type afs_RXFSReleaseLock = {
1708 .name = "FS.ReleaseLock",
1709 .deliver = afs_deliver_fs_xxxx_lock,
1710 .abort_to_error = afs_abort_to_error,
1711 .destructor = afs_flat_call_destructor,
1712};
1713
1714/*
1715 * get a lock on a file
1716 */
1717int afs_fs_set_lock(struct afs_server *server,
1718 struct key *key,
1719 struct afs_vnode *vnode,
1720 afs_lock_type_t type,
1721 const struct afs_wait_mode *wait_mode)
1722{
1723 struct afs_call *call;
1724 __be32 *bp;
1725
1726 _enter("");
1727
1728 call = afs_alloc_flat_call(&afs_RXFSSetLock, 5 * 4, 6 * 4);
1729 if (!call)
1730 return -ENOMEM;
1731
1732 call->key = key;
1733 call->reply = vnode;
1734 call->service_id = FS_SERVICE;
1735 call->port = htons(AFS_FS_PORT);
1736
1737 /* marshall the parameters */
1738 bp = call->request;
1739 *bp++ = htonl(FSSETLOCK);
1740 *bp++ = htonl(vnode->fid.vid);
1741 *bp++ = htonl(vnode->fid.vnode);
1742 *bp++ = htonl(vnode->fid.unique);
1743 *bp++ = htonl(type);
1744
1745 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1746}
1747
1748/*
1749 * extend a lock on a file
1750 */
1751int afs_fs_extend_lock(struct afs_server *server,
1752 struct key *key,
1753 struct afs_vnode *vnode,
1754 const struct afs_wait_mode *wait_mode)
1755{
1756 struct afs_call *call;
1757 __be32 *bp;
1758
1759 _enter("");
1760
1761 call = afs_alloc_flat_call(&afs_RXFSExtendLock, 4 * 4, 6 * 4);
1762 if (!call)
1763 return -ENOMEM;
1764
1765 call->key = key;
1766 call->reply = vnode;
1767 call->service_id = FS_SERVICE;
1768 call->port = htons(AFS_FS_PORT);
1769
1770 /* marshall the parameters */
1771 bp = call->request;
1772 *bp++ = htonl(FSEXTENDLOCK);
1773 *bp++ = htonl(vnode->fid.vid);
1774 *bp++ = htonl(vnode->fid.vnode);
1775 *bp++ = htonl(vnode->fid.unique);
1776
1777 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1778}
1779
1780/*
1781 * release a lock on a file
1782 */
1783int afs_fs_release_lock(struct afs_server *server,
1784 struct key *key,
1785 struct afs_vnode *vnode,
1786 const struct afs_wait_mode *wait_mode)
1787{
1788 struct afs_call *call;
1789 __be32 *bp;
1790
1791 _enter("");
1792
1793 call = afs_alloc_flat_call(&afs_RXFSReleaseLock, 4 * 4, 6 * 4);
1794 if (!call)
1795 return -ENOMEM;
1796
1797 call->key = key;
1798 call->reply = vnode;
1799 call->service_id = FS_SERVICE;
1800 call->port = htons(AFS_FS_PORT);
1801
1802 /* marshall the parameters */
1803 bp = call->request;
1804 *bp++ = htonl(FSRELEASELOCK);
1805 *bp++ = htonl(vnode->fid.vid);
1806 *bp++ = htonl(vnode->fid.vnode);
1807 *bp++ = htonl(vnode->fid.unique);
1808
1809 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1810}