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