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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#include "protocol_yfs.h"
17
18static inline void afs_use_fs_server(struct afs_call *call, struct afs_cb_interest *cbi)
19{
20 call->cbi = afs_get_cb_interest(cbi);
21}
22
23/*
24 * decode an AFSFid block
25 */
26static void xdr_decode_AFSFid(const __be32 **_bp, struct afs_fid *fid)
27{
28 const __be32 *bp = *_bp;
29
30 fid->vid = ntohl(*bp++);
31 fid->vnode = ntohl(*bp++);
32 fid->unique = ntohl(*bp++);
33 *_bp = bp;
34}
35
36/*
37 * Dump a bad file status record.
38 */
39static void xdr_dump_bad(const __be32 *bp)
40{
41 __be32 x[4];
42 int i;
43
44 pr_notice("AFS XDR: Bad status record\n");
45 for (i = 0; i < 5 * 4 * 4; i += 16) {
46 memcpy(x, bp, 16);
47 bp += 4;
48 pr_notice("%03x: %08x %08x %08x %08x\n",
49 i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
50 }
51
52 memcpy(x, bp, 4);
53 pr_notice("0x50: %08x\n", ntohl(x[0]));
54}
55
56/*
57 * decode an AFSFetchStatus block
58 */
59static int xdr_decode_AFSFetchStatus(const __be32 **_bp,
60 struct afs_call *call,
61 struct afs_status_cb *scb)
62{
63 const struct afs_xdr_AFSFetchStatus *xdr = (const void *)*_bp;
64 struct afs_file_status *status = &scb->status;
65 bool inline_error = (call->operation_ID == afs_FS_InlineBulkStatus);
66 u64 data_version, size;
67 u32 type, abort_code;
68
69 abort_code = ntohl(xdr->abort_code);
70
71 if (xdr->if_version != htonl(AFS_FSTATUS_VERSION)) {
72 if (xdr->if_version == htonl(0) &&
73 abort_code != 0 &&
74 inline_error) {
75 /* The OpenAFS fileserver has a bug in FS.InlineBulkStatus
76 * whereby it doesn't set the interface version in the error
77 * case.
78 */
79 status->abort_code = abort_code;
80 scb->have_error = true;
81 return 0;
82 }
83
84 pr_warn("Unknown AFSFetchStatus version %u\n", ntohl(xdr->if_version));
85 goto bad;
86 }
87
88 if (abort_code != 0 && inline_error) {
89 status->abort_code = abort_code;
90 return 0;
91 }
92
93 type = ntohl(xdr->type);
94 switch (type) {
95 case AFS_FTYPE_FILE:
96 case AFS_FTYPE_DIR:
97 case AFS_FTYPE_SYMLINK:
98 status->type = type;
99 break;
100 default:
101 goto bad;
102 }
103
104 status->nlink = ntohl(xdr->nlink);
105 status->author = ntohl(xdr->author);
106 status->owner = ntohl(xdr->owner);
107 status->caller_access = ntohl(xdr->caller_access); /* Ticket dependent */
108 status->anon_access = ntohl(xdr->anon_access);
109 status->mode = ntohl(xdr->mode) & S_IALLUGO;
110 status->group = ntohl(xdr->group);
111 status->lock_count = ntohl(xdr->lock_count);
112
113 status->mtime_client.tv_sec = ntohl(xdr->mtime_client);
114 status->mtime_client.tv_nsec = 0;
115 status->mtime_server.tv_sec = ntohl(xdr->mtime_server);
116 status->mtime_server.tv_nsec = 0;
117
118 size = (u64)ntohl(xdr->size_lo);
119 size |= (u64)ntohl(xdr->size_hi) << 32;
120 status->size = size;
121
122 data_version = (u64)ntohl(xdr->data_version_lo);
123 data_version |= (u64)ntohl(xdr->data_version_hi) << 32;
124 status->data_version = data_version;
125 scb->have_status = true;
126
127 *_bp = (const void *)*_bp + sizeof(*xdr);
128 return 0;
129
130bad:
131 xdr_dump_bad(*_bp);
132 return afs_protocol_error(call, -EBADMSG, afs_eproto_bad_status);
133}
134
135static time64_t xdr_decode_expiry(struct afs_call *call, u32 expiry)
136{
137 return ktime_divns(call->reply_time, NSEC_PER_SEC) + expiry;
138}
139
140static void xdr_decode_AFSCallBack(const __be32 **_bp,
141 struct afs_call *call,
142 struct afs_status_cb *scb)
143{
144 struct afs_callback *cb = &scb->callback;
145 const __be32 *bp = *_bp;
146
147 bp++; /* version */
148 cb->expires_at = xdr_decode_expiry(call, ntohl(*bp++));
149 bp++; /* type */
150 scb->have_cb = true;
151 *_bp = bp;
152}
153
154/*
155 * decode an AFSVolSync block
156 */
157static void xdr_decode_AFSVolSync(const __be32 **_bp,
158 struct afs_volsync *volsync)
159{
160 const __be32 *bp = *_bp;
161 u32 creation;
162
163 creation = ntohl(*bp++);
164 bp++; /* spare2 */
165 bp++; /* spare3 */
166 bp++; /* spare4 */
167 bp++; /* spare5 */
168 bp++; /* spare6 */
169 *_bp = bp;
170
171 if (volsync)
172 volsync->creation = creation;
173}
174
175/*
176 * encode the requested attributes into an AFSStoreStatus block
177 */
178static void xdr_encode_AFS_StoreStatus(__be32 **_bp, struct iattr *attr)
179{
180 __be32 *bp = *_bp;
181 u32 mask = 0, mtime = 0, owner = 0, group = 0, mode = 0;
182
183 mask = 0;
184 if (attr->ia_valid & ATTR_MTIME) {
185 mask |= AFS_SET_MTIME;
186 mtime = attr->ia_mtime.tv_sec;
187 }
188
189 if (attr->ia_valid & ATTR_UID) {
190 mask |= AFS_SET_OWNER;
191 owner = from_kuid(&init_user_ns, attr->ia_uid);
192 }
193
194 if (attr->ia_valid & ATTR_GID) {
195 mask |= AFS_SET_GROUP;
196 group = from_kgid(&init_user_ns, attr->ia_gid);
197 }
198
199 if (attr->ia_valid & ATTR_MODE) {
200 mask |= AFS_SET_MODE;
201 mode = attr->ia_mode & S_IALLUGO;
202 }
203
204 *bp++ = htonl(mask);
205 *bp++ = htonl(mtime);
206 *bp++ = htonl(owner);
207 *bp++ = htonl(group);
208 *bp++ = htonl(mode);
209 *bp++ = 0; /* segment size */
210 *_bp = bp;
211}
212
213/*
214 * decode an AFSFetchVolumeStatus block
215 */
216static void xdr_decode_AFSFetchVolumeStatus(const __be32 **_bp,
217 struct afs_volume_status *vs)
218{
219 const __be32 *bp = *_bp;
220
221 vs->vid = ntohl(*bp++);
222 vs->parent_id = ntohl(*bp++);
223 vs->online = ntohl(*bp++);
224 vs->in_service = ntohl(*bp++);
225 vs->blessed = ntohl(*bp++);
226 vs->needs_salvage = ntohl(*bp++);
227 vs->type = ntohl(*bp++);
228 vs->min_quota = ntohl(*bp++);
229 vs->max_quota = ntohl(*bp++);
230 vs->blocks_in_use = ntohl(*bp++);
231 vs->part_blocks_avail = ntohl(*bp++);
232 vs->part_max_blocks = ntohl(*bp++);
233 vs->vol_copy_date = 0;
234 vs->vol_backup_date = 0;
235 *_bp = bp;
236}
237
238/*
239 * deliver reply data to an FS.FetchStatus
240 */
241static int afs_deliver_fs_fetch_status_vnode(struct afs_call *call)
242{
243 const __be32 *bp;
244 int ret;
245
246 ret = afs_transfer_reply(call);
247 if (ret < 0)
248 return ret;
249
250 /* unmarshall the reply once we've received all of it */
251 bp = call->buffer;
252 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
253 if (ret < 0)
254 return ret;
255 xdr_decode_AFSCallBack(&bp, call, call->out_scb);
256 xdr_decode_AFSVolSync(&bp, call->out_volsync);
257
258 _leave(" = 0 [done]");
259 return 0;
260}
261
262/*
263 * FS.FetchStatus operation type
264 */
265static const struct afs_call_type afs_RXFSFetchStatus_vnode = {
266 .name = "FS.FetchStatus(vnode)",
267 .op = afs_FS_FetchStatus,
268 .deliver = afs_deliver_fs_fetch_status_vnode,
269 .destructor = afs_flat_call_destructor,
270};
271
272/*
273 * fetch the status information for a file
274 */
275int afs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_status_cb *scb,
276 struct afs_volsync *volsync)
277{
278 struct afs_vnode *vnode = fc->vnode;
279 struct afs_call *call;
280 struct afs_net *net = afs_v2net(vnode);
281 __be32 *bp;
282
283 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
284 return yfs_fs_fetch_file_status(fc, scb, volsync);
285
286 _enter(",%x,{%llx:%llu},,",
287 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
288
289 call = afs_alloc_flat_call(net, &afs_RXFSFetchStatus_vnode,
290 16, (21 + 3 + 6) * 4);
291 if (!call) {
292 fc->ac.error = -ENOMEM;
293 return -ENOMEM;
294 }
295
296 call->key = fc->key;
297 call->out_scb = scb;
298 call->out_volsync = volsync;
299
300 /* marshall the parameters */
301 bp = call->request;
302 bp[0] = htonl(FSFETCHSTATUS);
303 bp[1] = htonl(vnode->fid.vid);
304 bp[2] = htonl(vnode->fid.vnode);
305 bp[3] = htonl(vnode->fid.unique);
306
307 afs_use_fs_server(call, fc->cbi);
308 trace_afs_make_fs_call(call, &vnode->fid);
309
310 afs_set_fc_call(call, fc);
311 afs_make_call(&fc->ac, call, GFP_NOFS);
312 return afs_wait_for_call_to_complete(call, &fc->ac);
313}
314
315/*
316 * deliver reply data to an FS.FetchData
317 */
318static int afs_deliver_fs_fetch_data(struct afs_call *call)
319{
320 struct afs_read *req = call->read_request;
321 const __be32 *bp;
322 unsigned int size;
323 int ret;
324
325 _enter("{%u,%zu/%llu}",
326 call->unmarshall, iov_iter_count(&call->iter), req->actual_len);
327
328 switch (call->unmarshall) {
329 case 0:
330 req->actual_len = 0;
331 req->index = 0;
332 req->offset = req->pos & (PAGE_SIZE - 1);
333 call->unmarshall++;
334 if (call->operation_ID == FSFETCHDATA64) {
335 afs_extract_to_tmp64(call);
336 } else {
337 call->tmp_u = htonl(0);
338 afs_extract_to_tmp(call);
339 }
340 /* Fall through */
341
342 /* extract the returned data length */
343 case 1:
344 _debug("extract data length");
345 ret = afs_extract_data(call, true);
346 if (ret < 0)
347 return ret;
348
349 req->actual_len = be64_to_cpu(call->tmp64);
350 _debug("DATA length: %llu", req->actual_len);
351 req->remain = min(req->len, req->actual_len);
352 if (req->remain == 0)
353 goto no_more_data;
354
355 call->unmarshall++;
356
357 begin_page:
358 ASSERTCMP(req->index, <, req->nr_pages);
359 if (req->remain > PAGE_SIZE - req->offset)
360 size = PAGE_SIZE - req->offset;
361 else
362 size = req->remain;
363 call->bvec[0].bv_len = size;
364 call->bvec[0].bv_offset = req->offset;
365 call->bvec[0].bv_page = req->pages[req->index];
366 iov_iter_bvec(&call->iter, READ, call->bvec, 1, size);
367 ASSERTCMP(size, <=, PAGE_SIZE);
368 /* Fall through */
369
370 /* extract the returned data */
371 case 2:
372 _debug("extract data %zu/%llu",
373 iov_iter_count(&call->iter), req->remain);
374
375 ret = afs_extract_data(call, true);
376 if (ret < 0)
377 return ret;
378 req->remain -= call->bvec[0].bv_len;
379 req->offset += call->bvec[0].bv_len;
380 ASSERTCMP(req->offset, <=, PAGE_SIZE);
381 if (req->offset == PAGE_SIZE) {
382 req->offset = 0;
383 if (req->page_done)
384 req->page_done(req);
385 req->index++;
386 if (req->remain > 0)
387 goto begin_page;
388 }
389
390 ASSERTCMP(req->remain, ==, 0);
391 if (req->actual_len <= req->len)
392 goto no_more_data;
393
394 /* Discard any excess data the server gave us */
395 afs_extract_discard(call, req->actual_len - req->len);
396 call->unmarshall = 3;
397 /* Fall through */
398
399 case 3:
400 _debug("extract discard %zu/%llu",
401 iov_iter_count(&call->iter), req->actual_len - req->len);
402
403 ret = afs_extract_data(call, true);
404 if (ret < 0)
405 return ret;
406
407 no_more_data:
408 call->unmarshall = 4;
409 afs_extract_to_buf(call, (21 + 3 + 6) * 4);
410 /* Fall through */
411
412 /* extract the metadata */
413 case 4:
414 ret = afs_extract_data(call, false);
415 if (ret < 0)
416 return ret;
417
418 bp = call->buffer;
419 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
420 if (ret < 0)
421 return ret;
422 xdr_decode_AFSCallBack(&bp, call, call->out_scb);
423 xdr_decode_AFSVolSync(&bp, call->out_volsync);
424
425 req->data_version = call->out_scb->status.data_version;
426 req->file_size = call->out_scb->status.size;
427
428 call->unmarshall++;
429
430 case 5:
431 break;
432 }
433
434 for (; req->index < req->nr_pages; req->index++) {
435 if (req->offset < PAGE_SIZE)
436 zero_user_segment(req->pages[req->index],
437 req->offset, PAGE_SIZE);
438 if (req->page_done)
439 req->page_done(req);
440 req->offset = 0;
441 }
442
443 _leave(" = 0 [done]");
444 return 0;
445}
446
447static void afs_fetch_data_destructor(struct afs_call *call)
448{
449 struct afs_read *req = call->read_request;
450
451 afs_put_read(req);
452 afs_flat_call_destructor(call);
453}
454
455/*
456 * FS.FetchData operation type
457 */
458static const struct afs_call_type afs_RXFSFetchData = {
459 .name = "FS.FetchData",
460 .op = afs_FS_FetchData,
461 .deliver = afs_deliver_fs_fetch_data,
462 .destructor = afs_fetch_data_destructor,
463};
464
465static const struct afs_call_type afs_RXFSFetchData64 = {
466 .name = "FS.FetchData64",
467 .op = afs_FS_FetchData64,
468 .deliver = afs_deliver_fs_fetch_data,
469 .destructor = afs_fetch_data_destructor,
470};
471
472/*
473 * fetch data from a very large file
474 */
475static int afs_fs_fetch_data64(struct afs_fs_cursor *fc,
476 struct afs_status_cb *scb,
477 struct afs_read *req)
478{
479 struct afs_vnode *vnode = fc->vnode;
480 struct afs_call *call;
481 struct afs_net *net = afs_v2net(vnode);
482 __be32 *bp;
483
484 _enter("");
485
486 call = afs_alloc_flat_call(net, &afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4);
487 if (!call)
488 return -ENOMEM;
489
490 call->key = fc->key;
491 call->out_scb = scb;
492 call->out_volsync = NULL;
493 call->read_request = req;
494
495 /* marshall the parameters */
496 bp = call->request;
497 bp[0] = htonl(FSFETCHDATA64);
498 bp[1] = htonl(vnode->fid.vid);
499 bp[2] = htonl(vnode->fid.vnode);
500 bp[3] = htonl(vnode->fid.unique);
501 bp[4] = htonl(upper_32_bits(req->pos));
502 bp[5] = htonl(lower_32_bits(req->pos));
503 bp[6] = 0;
504 bp[7] = htonl(lower_32_bits(req->len));
505
506 refcount_inc(&req->usage);
507 afs_use_fs_server(call, fc->cbi);
508 trace_afs_make_fs_call(call, &vnode->fid);
509 afs_set_fc_call(call, fc);
510 afs_make_call(&fc->ac, call, GFP_NOFS);
511 return afs_wait_for_call_to_complete(call, &fc->ac);
512}
513
514/*
515 * fetch data from a file
516 */
517int afs_fs_fetch_data(struct afs_fs_cursor *fc,
518 struct afs_status_cb *scb,
519 struct afs_read *req)
520{
521 struct afs_vnode *vnode = fc->vnode;
522 struct afs_call *call;
523 struct afs_net *net = afs_v2net(vnode);
524 __be32 *bp;
525
526 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
527 return yfs_fs_fetch_data(fc, scb, req);
528
529 if (upper_32_bits(req->pos) ||
530 upper_32_bits(req->len) ||
531 upper_32_bits(req->pos + req->len))
532 return afs_fs_fetch_data64(fc, scb, req);
533
534 _enter("");
535
536 call = afs_alloc_flat_call(net, &afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
537 if (!call)
538 return -ENOMEM;
539
540 call->key = fc->key;
541 call->out_scb = scb;
542 call->out_volsync = NULL;
543 call->read_request = req;
544
545 /* marshall the parameters */
546 bp = call->request;
547 bp[0] = htonl(FSFETCHDATA);
548 bp[1] = htonl(vnode->fid.vid);
549 bp[2] = htonl(vnode->fid.vnode);
550 bp[3] = htonl(vnode->fid.unique);
551 bp[4] = htonl(lower_32_bits(req->pos));
552 bp[5] = htonl(lower_32_bits(req->len));
553
554 refcount_inc(&req->usage);
555 afs_use_fs_server(call, fc->cbi);
556 trace_afs_make_fs_call(call, &vnode->fid);
557 afs_set_fc_call(call, fc);
558 afs_make_call(&fc->ac, call, GFP_NOFS);
559 return afs_wait_for_call_to_complete(call, &fc->ac);
560}
561
562/*
563 * deliver reply data to an FS.CreateFile or an FS.MakeDir
564 */
565static int afs_deliver_fs_create_vnode(struct afs_call *call)
566{
567 const __be32 *bp;
568 int ret;
569
570 ret = afs_transfer_reply(call);
571 if (ret < 0)
572 return ret;
573
574 /* unmarshall the reply once we've received all of it */
575 bp = call->buffer;
576 xdr_decode_AFSFid(&bp, call->out_fid);
577 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
578 if (ret < 0)
579 return ret;
580 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb);
581 if (ret < 0)
582 return ret;
583 xdr_decode_AFSCallBack(&bp, call, call->out_scb);
584 xdr_decode_AFSVolSync(&bp, call->out_volsync);
585
586 _leave(" = 0 [done]");
587 return 0;
588}
589
590/*
591 * FS.CreateFile and FS.MakeDir operation type
592 */
593static const struct afs_call_type afs_RXFSCreateFile = {
594 .name = "FS.CreateFile",
595 .op = afs_FS_CreateFile,
596 .deliver = afs_deliver_fs_create_vnode,
597 .destructor = afs_flat_call_destructor,
598};
599
600static const struct afs_call_type afs_RXFSMakeDir = {
601 .name = "FS.MakeDir",
602 .op = afs_FS_MakeDir,
603 .deliver = afs_deliver_fs_create_vnode,
604 .destructor = afs_flat_call_destructor,
605};
606
607/*
608 * create a file or make a directory
609 */
610int afs_fs_create(struct afs_fs_cursor *fc,
611 const char *name,
612 umode_t mode,
613 struct afs_status_cb *dvnode_scb,
614 struct afs_fid *newfid,
615 struct afs_status_cb *new_scb)
616{
617 struct afs_vnode *dvnode = fc->vnode;
618 struct afs_call *call;
619 struct afs_net *net = afs_v2net(dvnode);
620 size_t namesz, reqsz, padsz;
621 __be32 *bp;
622
623 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags)){
624 if (S_ISDIR(mode))
625 return yfs_fs_make_dir(fc, name, mode, dvnode_scb,
626 newfid, new_scb);
627 else
628 return yfs_fs_create_file(fc, name, mode, dvnode_scb,
629 newfid, new_scb);
630 }
631
632 _enter("");
633
634 namesz = strlen(name);
635 padsz = (4 - (namesz & 3)) & 3;
636 reqsz = (5 * 4) + namesz + padsz + (6 * 4);
637
638 call = afs_alloc_flat_call(
639 net, S_ISDIR(mode) ? &afs_RXFSMakeDir : &afs_RXFSCreateFile,
640 reqsz, (3 + 21 + 21 + 3 + 6) * 4);
641 if (!call)
642 return -ENOMEM;
643
644 call->key = fc->key;
645 call->out_dir_scb = dvnode_scb;
646 call->out_fid = newfid;
647 call->out_scb = new_scb;
648
649 /* marshall the parameters */
650 bp = call->request;
651 *bp++ = htonl(S_ISDIR(mode) ? FSMAKEDIR : FSCREATEFILE);
652 *bp++ = htonl(dvnode->fid.vid);
653 *bp++ = htonl(dvnode->fid.vnode);
654 *bp++ = htonl(dvnode->fid.unique);
655 *bp++ = htonl(namesz);
656 memcpy(bp, name, namesz);
657 bp = (void *) bp + namesz;
658 if (padsz > 0) {
659 memset(bp, 0, padsz);
660 bp = (void *) bp + padsz;
661 }
662 *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
663 *bp++ = htonl(dvnode->vfs_inode.i_mtime.tv_sec); /* mtime */
664 *bp++ = 0; /* owner */
665 *bp++ = 0; /* group */
666 *bp++ = htonl(mode & S_IALLUGO); /* unix mode */
667 *bp++ = 0; /* segment size */
668
669 afs_use_fs_server(call, fc->cbi);
670 trace_afs_make_fs_call1(call, &dvnode->fid, name);
671 afs_set_fc_call(call, fc);
672 afs_make_call(&fc->ac, call, GFP_NOFS);
673 return afs_wait_for_call_to_complete(call, &fc->ac);
674}
675
676/*
677 * Deliver reply data to any operation that returns directory status and volume
678 * sync.
679 */
680static int afs_deliver_fs_dir_status_and_vol(struct afs_call *call)
681{
682 const __be32 *bp;
683 int ret;
684
685 ret = afs_transfer_reply(call);
686 if (ret < 0)
687 return ret;
688
689 /* unmarshall the reply once we've received all of it */
690 bp = call->buffer;
691 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb);
692 if (ret < 0)
693 return ret;
694 xdr_decode_AFSVolSync(&bp, call->out_volsync);
695
696 _leave(" = 0 [done]");
697 return 0;
698}
699
700/*
701 * FS.RemoveDir/FS.RemoveFile operation type
702 */
703static const struct afs_call_type afs_RXFSRemoveFile = {
704 .name = "FS.RemoveFile",
705 .op = afs_FS_RemoveFile,
706 .deliver = afs_deliver_fs_dir_status_and_vol,
707 .destructor = afs_flat_call_destructor,
708};
709
710static const struct afs_call_type afs_RXFSRemoveDir = {
711 .name = "FS.RemoveDir",
712 .op = afs_FS_RemoveDir,
713 .deliver = afs_deliver_fs_dir_status_and_vol,
714 .destructor = afs_flat_call_destructor,
715};
716
717/*
718 * remove a file or directory
719 */
720int afs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
721 const char *name, bool isdir, struct afs_status_cb *dvnode_scb)
722{
723 struct afs_vnode *dvnode = fc->vnode;
724 struct afs_call *call;
725 struct afs_net *net = afs_v2net(dvnode);
726 size_t namesz, reqsz, padsz;
727 __be32 *bp;
728
729 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
730 return yfs_fs_remove(fc, vnode, name, isdir, dvnode_scb);
731
732 _enter("");
733
734 namesz = strlen(name);
735 padsz = (4 - (namesz & 3)) & 3;
736 reqsz = (5 * 4) + namesz + padsz;
737
738 call = afs_alloc_flat_call(
739 net, isdir ? &afs_RXFSRemoveDir : &afs_RXFSRemoveFile,
740 reqsz, (21 + 6) * 4);
741 if (!call)
742 return -ENOMEM;
743
744 call->key = fc->key;
745 call->out_dir_scb = dvnode_scb;
746
747 /* marshall the parameters */
748 bp = call->request;
749 *bp++ = htonl(isdir ? FSREMOVEDIR : FSREMOVEFILE);
750 *bp++ = htonl(dvnode->fid.vid);
751 *bp++ = htonl(dvnode->fid.vnode);
752 *bp++ = htonl(dvnode->fid.unique);
753 *bp++ = htonl(namesz);
754 memcpy(bp, name, namesz);
755 bp = (void *) bp + namesz;
756 if (padsz > 0) {
757 memset(bp, 0, padsz);
758 bp = (void *) bp + padsz;
759 }
760
761 afs_use_fs_server(call, fc->cbi);
762 trace_afs_make_fs_call1(call, &dvnode->fid, name);
763 afs_set_fc_call(call, fc);
764 afs_make_call(&fc->ac, call, GFP_NOFS);
765 return afs_wait_for_call_to_complete(call, &fc->ac);
766}
767
768/*
769 * deliver reply data to an FS.Link
770 */
771static int afs_deliver_fs_link(struct afs_call *call)
772{
773 const __be32 *bp;
774 int ret;
775
776 _enter("{%u}", call->unmarshall);
777
778 ret = afs_transfer_reply(call);
779 if (ret < 0)
780 return ret;
781
782 /* unmarshall the reply once we've received all of it */
783 bp = call->buffer;
784 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
785 if (ret < 0)
786 return ret;
787 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb);
788 if (ret < 0)
789 return ret;
790 xdr_decode_AFSVolSync(&bp, call->out_volsync);
791
792 _leave(" = 0 [done]");
793 return 0;
794}
795
796/*
797 * FS.Link operation type
798 */
799static const struct afs_call_type afs_RXFSLink = {
800 .name = "FS.Link",
801 .op = afs_FS_Link,
802 .deliver = afs_deliver_fs_link,
803 .destructor = afs_flat_call_destructor,
804};
805
806/*
807 * make a hard link
808 */
809int afs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
810 const char *name,
811 struct afs_status_cb *dvnode_scb,
812 struct afs_status_cb *vnode_scb)
813{
814 struct afs_vnode *dvnode = fc->vnode;
815 struct afs_call *call;
816 struct afs_net *net = afs_v2net(vnode);
817 size_t namesz, reqsz, padsz;
818 __be32 *bp;
819
820 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
821 return yfs_fs_link(fc, vnode, name, dvnode_scb, vnode_scb);
822
823 _enter("");
824
825 namesz = strlen(name);
826 padsz = (4 - (namesz & 3)) & 3;
827 reqsz = (5 * 4) + namesz + padsz + (3 * 4);
828
829 call = afs_alloc_flat_call(net, &afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
830 if (!call)
831 return -ENOMEM;
832
833 call->key = fc->key;
834 call->out_dir_scb = dvnode_scb;
835 call->out_scb = vnode_scb;
836
837 /* marshall the parameters */
838 bp = call->request;
839 *bp++ = htonl(FSLINK);
840 *bp++ = htonl(dvnode->fid.vid);
841 *bp++ = htonl(dvnode->fid.vnode);
842 *bp++ = htonl(dvnode->fid.unique);
843 *bp++ = htonl(namesz);
844 memcpy(bp, name, namesz);
845 bp = (void *) bp + namesz;
846 if (padsz > 0) {
847 memset(bp, 0, padsz);
848 bp = (void *) bp + padsz;
849 }
850 *bp++ = htonl(vnode->fid.vid);
851 *bp++ = htonl(vnode->fid.vnode);
852 *bp++ = htonl(vnode->fid.unique);
853
854 afs_use_fs_server(call, fc->cbi);
855 trace_afs_make_fs_call1(call, &vnode->fid, name);
856 afs_set_fc_call(call, fc);
857 afs_make_call(&fc->ac, call, GFP_NOFS);
858 return afs_wait_for_call_to_complete(call, &fc->ac);
859}
860
861/*
862 * deliver reply data to an FS.Symlink
863 */
864static int afs_deliver_fs_symlink(struct afs_call *call)
865{
866 const __be32 *bp;
867 int ret;
868
869 _enter("{%u}", call->unmarshall);
870
871 ret = afs_transfer_reply(call);
872 if (ret < 0)
873 return ret;
874
875 /* unmarshall the reply once we've received all of it */
876 bp = call->buffer;
877 xdr_decode_AFSFid(&bp, call->out_fid);
878 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
879 if (ret < 0)
880 return ret;
881 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb);
882 if (ret < 0)
883 return ret;
884 xdr_decode_AFSVolSync(&bp, call->out_volsync);
885
886 _leave(" = 0 [done]");
887 return 0;
888}
889
890/*
891 * FS.Symlink operation type
892 */
893static const struct afs_call_type afs_RXFSSymlink = {
894 .name = "FS.Symlink",
895 .op = afs_FS_Symlink,
896 .deliver = afs_deliver_fs_symlink,
897 .destructor = afs_flat_call_destructor,
898};
899
900/*
901 * create a symbolic link
902 */
903int afs_fs_symlink(struct afs_fs_cursor *fc,
904 const char *name,
905 const char *contents,
906 struct afs_status_cb *dvnode_scb,
907 struct afs_fid *newfid,
908 struct afs_status_cb *new_scb)
909{
910 struct afs_vnode *dvnode = fc->vnode;
911 struct afs_call *call;
912 struct afs_net *net = afs_v2net(dvnode);
913 size_t namesz, reqsz, padsz, c_namesz, c_padsz;
914 __be32 *bp;
915
916 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
917 return yfs_fs_symlink(fc, name, contents, dvnode_scb,
918 newfid, new_scb);
919
920 _enter("");
921
922 namesz = strlen(name);
923 padsz = (4 - (namesz & 3)) & 3;
924
925 c_namesz = strlen(contents);
926 c_padsz = (4 - (c_namesz & 3)) & 3;
927
928 reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4);
929
930 call = afs_alloc_flat_call(net, &afs_RXFSSymlink, reqsz,
931 (3 + 21 + 21 + 6) * 4);
932 if (!call)
933 return -ENOMEM;
934
935 call->key = fc->key;
936 call->out_dir_scb = dvnode_scb;
937 call->out_fid = newfid;
938 call->out_scb = new_scb;
939
940 /* marshall the parameters */
941 bp = call->request;
942 *bp++ = htonl(FSSYMLINK);
943 *bp++ = htonl(dvnode->fid.vid);
944 *bp++ = htonl(dvnode->fid.vnode);
945 *bp++ = htonl(dvnode->fid.unique);
946 *bp++ = htonl(namesz);
947 memcpy(bp, name, namesz);
948 bp = (void *) bp + namesz;
949 if (padsz > 0) {
950 memset(bp, 0, padsz);
951 bp = (void *) bp + padsz;
952 }
953 *bp++ = htonl(c_namesz);
954 memcpy(bp, contents, c_namesz);
955 bp = (void *) bp + c_namesz;
956 if (c_padsz > 0) {
957 memset(bp, 0, c_padsz);
958 bp = (void *) bp + c_padsz;
959 }
960 *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
961 *bp++ = htonl(dvnode->vfs_inode.i_mtime.tv_sec); /* mtime */
962 *bp++ = 0; /* owner */
963 *bp++ = 0; /* group */
964 *bp++ = htonl(S_IRWXUGO); /* unix mode */
965 *bp++ = 0; /* segment size */
966
967 afs_use_fs_server(call, fc->cbi);
968 trace_afs_make_fs_call1(call, &dvnode->fid, name);
969 afs_set_fc_call(call, fc);
970 afs_make_call(&fc->ac, call, GFP_NOFS);
971 return afs_wait_for_call_to_complete(call, &fc->ac);
972}
973
974/*
975 * deliver reply data to an FS.Rename
976 */
977static int afs_deliver_fs_rename(struct afs_call *call)
978{
979 const __be32 *bp;
980 int ret;
981
982 ret = afs_transfer_reply(call);
983 if (ret < 0)
984 return ret;
985
986 /* unmarshall the reply once we've received all of it */
987 bp = call->buffer;
988 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb);
989 if (ret < 0)
990 return ret;
991 if (call->out_dir_scb != call->out_scb) {
992 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
993 if (ret < 0)
994 return ret;
995 }
996 xdr_decode_AFSVolSync(&bp, call->out_volsync);
997
998 _leave(" = 0 [done]");
999 return 0;
1000}
1001
1002/*
1003 * FS.Rename operation type
1004 */
1005static const struct afs_call_type afs_RXFSRename = {
1006 .name = "FS.Rename",
1007 .op = afs_FS_Rename,
1008 .deliver = afs_deliver_fs_rename,
1009 .destructor = afs_flat_call_destructor,
1010};
1011
1012/*
1013 * Rename/move a file or directory.
1014 */
1015int afs_fs_rename(struct afs_fs_cursor *fc,
1016 const char *orig_name,
1017 struct afs_vnode *new_dvnode,
1018 const char *new_name,
1019 struct afs_status_cb *orig_dvnode_scb,
1020 struct afs_status_cb *new_dvnode_scb)
1021{
1022 struct afs_vnode *orig_dvnode = fc->vnode;
1023 struct afs_call *call;
1024 struct afs_net *net = afs_v2net(orig_dvnode);
1025 size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz;
1026 __be32 *bp;
1027
1028 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
1029 return yfs_fs_rename(fc, orig_name,
1030 new_dvnode, new_name,
1031 orig_dvnode_scb,
1032 new_dvnode_scb);
1033
1034 _enter("");
1035
1036 o_namesz = strlen(orig_name);
1037 o_padsz = (4 - (o_namesz & 3)) & 3;
1038
1039 n_namesz = strlen(new_name);
1040 n_padsz = (4 - (n_namesz & 3)) & 3;
1041
1042 reqsz = (4 * 4) +
1043 4 + o_namesz + o_padsz +
1044 (3 * 4) +
1045 4 + n_namesz + n_padsz;
1046
1047 call = afs_alloc_flat_call(net, &afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
1048 if (!call)
1049 return -ENOMEM;
1050
1051 call->key = fc->key;
1052 call->out_dir_scb = orig_dvnode_scb;
1053 call->out_scb = new_dvnode_scb;
1054
1055 /* marshall the parameters */
1056 bp = call->request;
1057 *bp++ = htonl(FSRENAME);
1058 *bp++ = htonl(orig_dvnode->fid.vid);
1059 *bp++ = htonl(orig_dvnode->fid.vnode);
1060 *bp++ = htonl(orig_dvnode->fid.unique);
1061 *bp++ = htonl(o_namesz);
1062 memcpy(bp, orig_name, o_namesz);
1063 bp = (void *) bp + o_namesz;
1064 if (o_padsz > 0) {
1065 memset(bp, 0, o_padsz);
1066 bp = (void *) bp + o_padsz;
1067 }
1068
1069 *bp++ = htonl(new_dvnode->fid.vid);
1070 *bp++ = htonl(new_dvnode->fid.vnode);
1071 *bp++ = htonl(new_dvnode->fid.unique);
1072 *bp++ = htonl(n_namesz);
1073 memcpy(bp, new_name, n_namesz);
1074 bp = (void *) bp + n_namesz;
1075 if (n_padsz > 0) {
1076 memset(bp, 0, n_padsz);
1077 bp = (void *) bp + n_padsz;
1078 }
1079
1080 afs_use_fs_server(call, fc->cbi);
1081 trace_afs_make_fs_call2(call, &orig_dvnode->fid, orig_name, new_name);
1082 afs_set_fc_call(call, fc);
1083 afs_make_call(&fc->ac, call, GFP_NOFS);
1084 return afs_wait_for_call_to_complete(call, &fc->ac);
1085}
1086
1087/*
1088 * deliver reply data to an FS.StoreData
1089 */
1090static int afs_deliver_fs_store_data(struct afs_call *call)
1091{
1092 const __be32 *bp;
1093 int ret;
1094
1095 _enter("");
1096
1097 ret = afs_transfer_reply(call);
1098 if (ret < 0)
1099 return ret;
1100
1101 /* unmarshall the reply once we've received all of it */
1102 bp = call->buffer;
1103 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
1104 if (ret < 0)
1105 return ret;
1106 xdr_decode_AFSVolSync(&bp, call->out_volsync);
1107
1108 _leave(" = 0 [done]");
1109 return 0;
1110}
1111
1112/*
1113 * FS.StoreData operation type
1114 */
1115static const struct afs_call_type afs_RXFSStoreData = {
1116 .name = "FS.StoreData",
1117 .op = afs_FS_StoreData,
1118 .deliver = afs_deliver_fs_store_data,
1119 .destructor = afs_flat_call_destructor,
1120};
1121
1122static const struct afs_call_type afs_RXFSStoreData64 = {
1123 .name = "FS.StoreData64",
1124 .op = afs_FS_StoreData64,
1125 .deliver = afs_deliver_fs_store_data,
1126 .destructor = afs_flat_call_destructor,
1127};
1128
1129/*
1130 * store a set of pages to a very large file
1131 */
1132static int afs_fs_store_data64(struct afs_fs_cursor *fc,
1133 struct address_space *mapping,
1134 pgoff_t first, pgoff_t last,
1135 unsigned offset, unsigned to,
1136 loff_t size, loff_t pos, loff_t i_size,
1137 struct afs_status_cb *scb)
1138{
1139 struct afs_vnode *vnode = fc->vnode;
1140 struct afs_call *call;
1141 struct afs_net *net = afs_v2net(vnode);
1142 __be32 *bp;
1143
1144 _enter(",%x,{%llx:%llu},,",
1145 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1146
1147 call = afs_alloc_flat_call(net, &afs_RXFSStoreData64,
1148 (4 + 6 + 3 * 2) * 4,
1149 (21 + 6) * 4);
1150 if (!call)
1151 return -ENOMEM;
1152
1153 call->key = fc->key;
1154 call->mapping = mapping;
1155 call->first = first;
1156 call->last = last;
1157 call->first_offset = offset;
1158 call->last_to = to;
1159 call->send_pages = true;
1160 call->out_scb = scb;
1161
1162 /* marshall the parameters */
1163 bp = call->request;
1164 *bp++ = htonl(FSSTOREDATA64);
1165 *bp++ = htonl(vnode->fid.vid);
1166 *bp++ = htonl(vnode->fid.vnode);
1167 *bp++ = htonl(vnode->fid.unique);
1168
1169 *bp++ = htonl(AFS_SET_MTIME); /* mask */
1170 *bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
1171 *bp++ = 0; /* owner */
1172 *bp++ = 0; /* group */
1173 *bp++ = 0; /* unix mode */
1174 *bp++ = 0; /* segment size */
1175
1176 *bp++ = htonl(pos >> 32);
1177 *bp++ = htonl((u32) pos);
1178 *bp++ = htonl(size >> 32);
1179 *bp++ = htonl((u32) size);
1180 *bp++ = htonl(i_size >> 32);
1181 *bp++ = htonl((u32) i_size);
1182
1183 trace_afs_make_fs_call(call, &vnode->fid);
1184 afs_set_fc_call(call, fc);
1185 afs_make_call(&fc->ac, call, GFP_NOFS);
1186 return afs_wait_for_call_to_complete(call, &fc->ac);
1187}
1188
1189/*
1190 * store a set of pages
1191 */
1192int afs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
1193 pgoff_t first, pgoff_t last,
1194 unsigned offset, unsigned to,
1195 struct afs_status_cb *scb)
1196{
1197 struct afs_vnode *vnode = fc->vnode;
1198 struct afs_call *call;
1199 struct afs_net *net = afs_v2net(vnode);
1200 loff_t size, pos, i_size;
1201 __be32 *bp;
1202
1203 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
1204 return yfs_fs_store_data(fc, mapping, first, last, offset, to, scb);
1205
1206 _enter(",%x,{%llx:%llu},,",
1207 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1208
1209 size = (loff_t)to - (loff_t)offset;
1210 if (first != last)
1211 size += (loff_t)(last - first) << PAGE_SHIFT;
1212 pos = (loff_t)first << PAGE_SHIFT;
1213 pos += offset;
1214
1215 i_size = i_size_read(&vnode->vfs_inode);
1216 if (pos + size > i_size)
1217 i_size = size + pos;
1218
1219 _debug("size %llx, at %llx, i_size %llx",
1220 (unsigned long long) size, (unsigned long long) pos,
1221 (unsigned long long) i_size);
1222
1223 if (pos >> 32 || i_size >> 32 || size >> 32 || (pos + size) >> 32)
1224 return afs_fs_store_data64(fc, mapping, first, last, offset, to,
1225 size, pos, i_size, scb);
1226
1227 call = afs_alloc_flat_call(net, &afs_RXFSStoreData,
1228 (4 + 6 + 3) * 4,
1229 (21 + 6) * 4);
1230 if (!call)
1231 return -ENOMEM;
1232
1233 call->key = fc->key;
1234 call->mapping = mapping;
1235 call->first = first;
1236 call->last = last;
1237 call->first_offset = offset;
1238 call->last_to = to;
1239 call->send_pages = true;
1240 call->out_scb = scb;
1241
1242 /* marshall the parameters */
1243 bp = call->request;
1244 *bp++ = htonl(FSSTOREDATA);
1245 *bp++ = htonl(vnode->fid.vid);
1246 *bp++ = htonl(vnode->fid.vnode);
1247 *bp++ = htonl(vnode->fid.unique);
1248
1249 *bp++ = htonl(AFS_SET_MTIME); /* mask */
1250 *bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
1251 *bp++ = 0; /* owner */
1252 *bp++ = 0; /* group */
1253 *bp++ = 0; /* unix mode */
1254 *bp++ = 0; /* segment size */
1255
1256 *bp++ = htonl(pos);
1257 *bp++ = htonl(size);
1258 *bp++ = htonl(i_size);
1259
1260 afs_use_fs_server(call, fc->cbi);
1261 trace_afs_make_fs_call(call, &vnode->fid);
1262 afs_set_fc_call(call, fc);
1263 afs_make_call(&fc->ac, call, GFP_NOFS);
1264 return afs_wait_for_call_to_complete(call, &fc->ac);
1265}
1266
1267/*
1268 * deliver reply data to an FS.StoreStatus
1269 */
1270static int afs_deliver_fs_store_status(struct afs_call *call)
1271{
1272 const __be32 *bp;
1273 int ret;
1274
1275 _enter("");
1276
1277 ret = afs_transfer_reply(call);
1278 if (ret < 0)
1279 return ret;
1280
1281 /* unmarshall the reply once we've received all of it */
1282 bp = call->buffer;
1283 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
1284 if (ret < 0)
1285 return ret;
1286 xdr_decode_AFSVolSync(&bp, call->out_volsync);
1287
1288 _leave(" = 0 [done]");
1289 return 0;
1290}
1291
1292/*
1293 * FS.StoreStatus operation type
1294 */
1295static const struct afs_call_type afs_RXFSStoreStatus = {
1296 .name = "FS.StoreStatus",
1297 .op = afs_FS_StoreStatus,
1298 .deliver = afs_deliver_fs_store_status,
1299 .destructor = afs_flat_call_destructor,
1300};
1301
1302static const struct afs_call_type afs_RXFSStoreData_as_Status = {
1303 .name = "FS.StoreData",
1304 .op = afs_FS_StoreData,
1305 .deliver = afs_deliver_fs_store_status,
1306 .destructor = afs_flat_call_destructor,
1307};
1308
1309static const struct afs_call_type afs_RXFSStoreData64_as_Status = {
1310 .name = "FS.StoreData64",
1311 .op = afs_FS_StoreData64,
1312 .deliver = afs_deliver_fs_store_status,
1313 .destructor = afs_flat_call_destructor,
1314};
1315
1316/*
1317 * set the attributes on a very large file, using FS.StoreData rather than
1318 * FS.StoreStatus so as to alter the file size also
1319 */
1320static int afs_fs_setattr_size64(struct afs_fs_cursor *fc, struct iattr *attr,
1321 struct afs_status_cb *scb)
1322{
1323 struct afs_vnode *vnode = fc->vnode;
1324 struct afs_call *call;
1325 struct afs_net *net = afs_v2net(vnode);
1326 __be32 *bp;
1327
1328 _enter(",%x,{%llx:%llu},,",
1329 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1330
1331 ASSERT(attr->ia_valid & ATTR_SIZE);
1332
1333 call = afs_alloc_flat_call(net, &afs_RXFSStoreData64_as_Status,
1334 (4 + 6 + 3 * 2) * 4,
1335 (21 + 6) * 4);
1336 if (!call)
1337 return -ENOMEM;
1338
1339 call->key = fc->key;
1340 call->out_scb = scb;
1341
1342 /* marshall the parameters */
1343 bp = call->request;
1344 *bp++ = htonl(FSSTOREDATA64);
1345 *bp++ = htonl(vnode->fid.vid);
1346 *bp++ = htonl(vnode->fid.vnode);
1347 *bp++ = htonl(vnode->fid.unique);
1348
1349 xdr_encode_AFS_StoreStatus(&bp, attr);
1350
1351 *bp++ = htonl(attr->ia_size >> 32); /* position of start of write */
1352 *bp++ = htonl((u32) attr->ia_size);
1353 *bp++ = 0; /* size of write */
1354 *bp++ = 0;
1355 *bp++ = htonl(attr->ia_size >> 32); /* new file length */
1356 *bp++ = htonl((u32) attr->ia_size);
1357
1358 afs_use_fs_server(call, fc->cbi);
1359 trace_afs_make_fs_call(call, &vnode->fid);
1360 afs_set_fc_call(call, fc);
1361 afs_make_call(&fc->ac, call, GFP_NOFS);
1362 return afs_wait_for_call_to_complete(call, &fc->ac);
1363}
1364
1365/*
1366 * set the attributes on a file, using FS.StoreData rather than FS.StoreStatus
1367 * so as to alter the file size also
1368 */
1369static int afs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr,
1370 struct afs_status_cb *scb)
1371{
1372 struct afs_vnode *vnode = fc->vnode;
1373 struct afs_call *call;
1374 struct afs_net *net = afs_v2net(vnode);
1375 __be32 *bp;
1376
1377 _enter(",%x,{%llx:%llu},,",
1378 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1379
1380 ASSERT(attr->ia_valid & ATTR_SIZE);
1381 if (attr->ia_size >> 32)
1382 return afs_fs_setattr_size64(fc, attr, scb);
1383
1384 call = afs_alloc_flat_call(net, &afs_RXFSStoreData_as_Status,
1385 (4 + 6 + 3) * 4,
1386 (21 + 6) * 4);
1387 if (!call)
1388 return -ENOMEM;
1389
1390 call->key = fc->key;
1391 call->out_scb = scb;
1392
1393 /* marshall the parameters */
1394 bp = call->request;
1395 *bp++ = htonl(FSSTOREDATA);
1396 *bp++ = htonl(vnode->fid.vid);
1397 *bp++ = htonl(vnode->fid.vnode);
1398 *bp++ = htonl(vnode->fid.unique);
1399
1400 xdr_encode_AFS_StoreStatus(&bp, attr);
1401
1402 *bp++ = htonl(attr->ia_size); /* position of start of write */
1403 *bp++ = 0; /* size of write */
1404 *bp++ = htonl(attr->ia_size); /* new file length */
1405
1406 afs_use_fs_server(call, fc->cbi);
1407 trace_afs_make_fs_call(call, &vnode->fid);
1408 afs_set_fc_call(call, fc);
1409 afs_make_call(&fc->ac, call, GFP_NOFS);
1410 return afs_wait_for_call_to_complete(call, &fc->ac);
1411}
1412
1413/*
1414 * set the attributes on a file, using FS.StoreData if there's a change in file
1415 * size, and FS.StoreStatus otherwise
1416 */
1417int afs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr,
1418 struct afs_status_cb *scb)
1419{
1420 struct afs_vnode *vnode = fc->vnode;
1421 struct afs_call *call;
1422 struct afs_net *net = afs_v2net(vnode);
1423 __be32 *bp;
1424
1425 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
1426 return yfs_fs_setattr(fc, attr, scb);
1427
1428 if (attr->ia_valid & ATTR_SIZE)
1429 return afs_fs_setattr_size(fc, attr, scb);
1430
1431 _enter(",%x,{%llx:%llu},,",
1432 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1433
1434 call = afs_alloc_flat_call(net, &afs_RXFSStoreStatus,
1435 (4 + 6) * 4,
1436 (21 + 6) * 4);
1437 if (!call)
1438 return -ENOMEM;
1439
1440 call->key = fc->key;
1441 call->out_scb = scb;
1442
1443 /* marshall the parameters */
1444 bp = call->request;
1445 *bp++ = htonl(FSSTORESTATUS);
1446 *bp++ = htonl(vnode->fid.vid);
1447 *bp++ = htonl(vnode->fid.vnode);
1448 *bp++ = htonl(vnode->fid.unique);
1449
1450 xdr_encode_AFS_StoreStatus(&bp, attr);
1451
1452 afs_use_fs_server(call, fc->cbi);
1453 trace_afs_make_fs_call(call, &vnode->fid);
1454 afs_set_fc_call(call, fc);
1455 afs_make_call(&fc->ac, call, GFP_NOFS);
1456 return afs_wait_for_call_to_complete(call, &fc->ac);
1457}
1458
1459/*
1460 * deliver reply data to an FS.GetVolumeStatus
1461 */
1462static int afs_deliver_fs_get_volume_status(struct afs_call *call)
1463{
1464 const __be32 *bp;
1465 char *p;
1466 u32 size;
1467 int ret;
1468
1469 _enter("{%u}", call->unmarshall);
1470
1471 switch (call->unmarshall) {
1472 case 0:
1473 call->unmarshall++;
1474 afs_extract_to_buf(call, 12 * 4);
1475 /* Fall through */
1476
1477 /* extract the returned status record */
1478 case 1:
1479 _debug("extract status");
1480 ret = afs_extract_data(call, true);
1481 if (ret < 0)
1482 return ret;
1483
1484 bp = call->buffer;
1485 xdr_decode_AFSFetchVolumeStatus(&bp, call->out_volstatus);
1486 call->unmarshall++;
1487 afs_extract_to_tmp(call);
1488 /* Fall through */
1489
1490 /* extract the volume name length */
1491 case 2:
1492 ret = afs_extract_data(call, true);
1493 if (ret < 0)
1494 return ret;
1495
1496 call->count = ntohl(call->tmp);
1497 _debug("volname length: %u", call->count);
1498 if (call->count >= AFSNAMEMAX)
1499 return afs_protocol_error(call, -EBADMSG,
1500 afs_eproto_volname_len);
1501 size = (call->count + 3) & ~3; /* It's padded */
1502 afs_extract_to_buf(call, size);
1503 call->unmarshall++;
1504 /* Fall through */
1505
1506 /* extract the volume name */
1507 case 3:
1508 _debug("extract volname");
1509 ret = afs_extract_data(call, true);
1510 if (ret < 0)
1511 return ret;
1512
1513 p = call->buffer;
1514 p[call->count] = 0;
1515 _debug("volname '%s'", p);
1516 afs_extract_to_tmp(call);
1517 call->unmarshall++;
1518 /* Fall through */
1519
1520 /* extract the offline message length */
1521 case 4:
1522 ret = afs_extract_data(call, true);
1523 if (ret < 0)
1524 return ret;
1525
1526 call->count = ntohl(call->tmp);
1527 _debug("offline msg length: %u", call->count);
1528 if (call->count >= AFSNAMEMAX)
1529 return afs_protocol_error(call, -EBADMSG,
1530 afs_eproto_offline_msg_len);
1531 size = (call->count + 3) & ~3; /* It's padded */
1532 afs_extract_to_buf(call, size);
1533 call->unmarshall++;
1534 /* Fall through */
1535
1536 /* extract the offline message */
1537 case 5:
1538 _debug("extract offline");
1539 ret = afs_extract_data(call, true);
1540 if (ret < 0)
1541 return ret;
1542
1543 p = call->buffer;
1544 p[call->count] = 0;
1545 _debug("offline '%s'", p);
1546
1547 afs_extract_to_tmp(call);
1548 call->unmarshall++;
1549 /* Fall through */
1550
1551 /* extract the message of the day length */
1552 case 6:
1553 ret = afs_extract_data(call, true);
1554 if (ret < 0)
1555 return ret;
1556
1557 call->count = ntohl(call->tmp);
1558 _debug("motd length: %u", call->count);
1559 if (call->count >= AFSNAMEMAX)
1560 return afs_protocol_error(call, -EBADMSG,
1561 afs_eproto_motd_len);
1562 size = (call->count + 3) & ~3; /* It's padded */
1563 afs_extract_to_buf(call, size);
1564 call->unmarshall++;
1565 /* Fall through */
1566
1567 /* extract the message of the day */
1568 case 7:
1569 _debug("extract motd");
1570 ret = afs_extract_data(call, false);
1571 if (ret < 0)
1572 return ret;
1573
1574 p = call->buffer;
1575 p[call->count] = 0;
1576 _debug("motd '%s'", p);
1577
1578 call->unmarshall++;
1579
1580 case 8:
1581 break;
1582 }
1583
1584 _leave(" = 0 [done]");
1585 return 0;
1586}
1587
1588/*
1589 * FS.GetVolumeStatus operation type
1590 */
1591static const struct afs_call_type afs_RXFSGetVolumeStatus = {
1592 .name = "FS.GetVolumeStatus",
1593 .op = afs_FS_GetVolumeStatus,
1594 .deliver = afs_deliver_fs_get_volume_status,
1595 .destructor = afs_flat_call_destructor,
1596};
1597
1598/*
1599 * fetch the status of a volume
1600 */
1601int afs_fs_get_volume_status(struct afs_fs_cursor *fc,
1602 struct afs_volume_status *vs)
1603{
1604 struct afs_vnode *vnode = fc->vnode;
1605 struct afs_call *call;
1606 struct afs_net *net = afs_v2net(vnode);
1607 __be32 *bp;
1608
1609 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
1610 return yfs_fs_get_volume_status(fc, vs);
1611
1612 _enter("");
1613
1614 call = afs_alloc_flat_call(net, &afs_RXFSGetVolumeStatus, 2 * 4,
1615 max(12 * 4, AFSOPAQUEMAX + 1));
1616 if (!call)
1617 return -ENOMEM;
1618
1619 call->key = fc->key;
1620 call->out_volstatus = vs;
1621
1622 /* marshall the parameters */
1623 bp = call->request;
1624 bp[0] = htonl(FSGETVOLUMESTATUS);
1625 bp[1] = htonl(vnode->fid.vid);
1626
1627 afs_use_fs_server(call, fc->cbi);
1628 trace_afs_make_fs_call(call, &vnode->fid);
1629 afs_set_fc_call(call, fc);
1630 afs_make_call(&fc->ac, call, GFP_NOFS);
1631 return afs_wait_for_call_to_complete(call, &fc->ac);
1632}
1633
1634/*
1635 * deliver reply data to an FS.SetLock, FS.ExtendLock or FS.ReleaseLock
1636 */
1637static int afs_deliver_fs_xxxx_lock(struct afs_call *call)
1638{
1639 const __be32 *bp;
1640 int ret;
1641
1642 _enter("{%u}", call->unmarshall);
1643
1644 ret = afs_transfer_reply(call);
1645 if (ret < 0)
1646 return ret;
1647
1648 /* unmarshall the reply once we've received all of it */
1649 bp = call->buffer;
1650 xdr_decode_AFSVolSync(&bp, call->out_volsync);
1651
1652 _leave(" = 0 [done]");
1653 return 0;
1654}
1655
1656/*
1657 * FS.SetLock operation type
1658 */
1659static const struct afs_call_type afs_RXFSSetLock = {
1660 .name = "FS.SetLock",
1661 .op = afs_FS_SetLock,
1662 .deliver = afs_deliver_fs_xxxx_lock,
1663 .done = afs_lock_op_done,
1664 .destructor = afs_flat_call_destructor,
1665};
1666
1667/*
1668 * FS.ExtendLock operation type
1669 */
1670static const struct afs_call_type afs_RXFSExtendLock = {
1671 .name = "FS.ExtendLock",
1672 .op = afs_FS_ExtendLock,
1673 .deliver = afs_deliver_fs_xxxx_lock,
1674 .done = afs_lock_op_done,
1675 .destructor = afs_flat_call_destructor,
1676};
1677
1678/*
1679 * FS.ReleaseLock operation type
1680 */
1681static const struct afs_call_type afs_RXFSReleaseLock = {
1682 .name = "FS.ReleaseLock",
1683 .op = afs_FS_ReleaseLock,
1684 .deliver = afs_deliver_fs_xxxx_lock,
1685 .destructor = afs_flat_call_destructor,
1686};
1687
1688/*
1689 * Set a lock on a file
1690 */
1691int afs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type,
1692 struct afs_status_cb *scb)
1693{
1694 struct afs_vnode *vnode = fc->vnode;
1695 struct afs_call *call;
1696 struct afs_net *net = afs_v2net(vnode);
1697 __be32 *bp;
1698
1699 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
1700 return yfs_fs_set_lock(fc, type, scb);
1701
1702 _enter("");
1703
1704 call = afs_alloc_flat_call(net, &afs_RXFSSetLock, 5 * 4, 6 * 4);
1705 if (!call)
1706 return -ENOMEM;
1707
1708 call->key = fc->key;
1709 call->lvnode = vnode;
1710 call->out_scb = scb;
1711
1712 /* marshall the parameters */
1713 bp = call->request;
1714 *bp++ = htonl(FSSETLOCK);
1715 *bp++ = htonl(vnode->fid.vid);
1716 *bp++ = htonl(vnode->fid.vnode);
1717 *bp++ = htonl(vnode->fid.unique);
1718 *bp++ = htonl(type);
1719
1720 afs_use_fs_server(call, fc->cbi);
1721 trace_afs_make_fs_calli(call, &vnode->fid, type);
1722 afs_set_fc_call(call, fc);
1723 afs_make_call(&fc->ac, call, GFP_NOFS);
1724 return afs_wait_for_call_to_complete(call, &fc->ac);
1725}
1726
1727/*
1728 * extend a lock on a file
1729 */
1730int afs_fs_extend_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb)
1731{
1732 struct afs_vnode *vnode = fc->vnode;
1733 struct afs_call *call;
1734 struct afs_net *net = afs_v2net(vnode);
1735 __be32 *bp;
1736
1737 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
1738 return yfs_fs_extend_lock(fc, scb);
1739
1740 _enter("");
1741
1742 call = afs_alloc_flat_call(net, &afs_RXFSExtendLock, 4 * 4, 6 * 4);
1743 if (!call)
1744 return -ENOMEM;
1745
1746 call->key = fc->key;
1747 call->lvnode = vnode;
1748 call->out_scb = scb;
1749
1750 /* marshall the parameters */
1751 bp = call->request;
1752 *bp++ = htonl(FSEXTENDLOCK);
1753 *bp++ = htonl(vnode->fid.vid);
1754 *bp++ = htonl(vnode->fid.vnode);
1755 *bp++ = htonl(vnode->fid.unique);
1756
1757 afs_use_fs_server(call, fc->cbi);
1758 trace_afs_make_fs_call(call, &vnode->fid);
1759 afs_set_fc_call(call, fc);
1760 afs_make_call(&fc->ac, call, GFP_NOFS);
1761 return afs_wait_for_call_to_complete(call, &fc->ac);
1762}
1763
1764/*
1765 * release a lock on a file
1766 */
1767int afs_fs_release_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb)
1768{
1769 struct afs_vnode *vnode = fc->vnode;
1770 struct afs_call *call;
1771 struct afs_net *net = afs_v2net(vnode);
1772 __be32 *bp;
1773
1774 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
1775 return yfs_fs_release_lock(fc, scb);
1776
1777 _enter("");
1778
1779 call = afs_alloc_flat_call(net, &afs_RXFSReleaseLock, 4 * 4, 6 * 4);
1780 if (!call)
1781 return -ENOMEM;
1782
1783 call->key = fc->key;
1784 call->lvnode = vnode;
1785 call->out_scb = scb;
1786
1787 /* marshall the parameters */
1788 bp = call->request;
1789 *bp++ = htonl(FSRELEASELOCK);
1790 *bp++ = htonl(vnode->fid.vid);
1791 *bp++ = htonl(vnode->fid.vnode);
1792 *bp++ = htonl(vnode->fid.unique);
1793
1794 afs_use_fs_server(call, fc->cbi);
1795 trace_afs_make_fs_call(call, &vnode->fid);
1796 afs_set_fc_call(call, fc);
1797 afs_make_call(&fc->ac, call, GFP_NOFS);
1798 return afs_wait_for_call_to_complete(call, &fc->ac);
1799}
1800
1801/*
1802 * Deliver reply data to an FS.GiveUpAllCallBacks operation.
1803 */
1804static int afs_deliver_fs_give_up_all_callbacks(struct afs_call *call)
1805{
1806 return afs_transfer_reply(call);
1807}
1808
1809/*
1810 * FS.GiveUpAllCallBacks operation type
1811 */
1812static const struct afs_call_type afs_RXFSGiveUpAllCallBacks = {
1813 .name = "FS.GiveUpAllCallBacks",
1814 .op = afs_FS_GiveUpAllCallBacks,
1815 .deliver = afs_deliver_fs_give_up_all_callbacks,
1816 .destructor = afs_flat_call_destructor,
1817};
1818
1819/*
1820 * Flush all the callbacks we have on a server.
1821 */
1822int afs_fs_give_up_all_callbacks(struct afs_net *net,
1823 struct afs_server *server,
1824 struct afs_addr_cursor *ac,
1825 struct key *key)
1826{
1827 struct afs_call *call;
1828 __be32 *bp;
1829
1830 _enter("");
1831
1832 call = afs_alloc_flat_call(net, &afs_RXFSGiveUpAllCallBacks, 1 * 4, 0);
1833 if (!call)
1834 return -ENOMEM;
1835
1836 call->key = key;
1837
1838 /* marshall the parameters */
1839 bp = call->request;
1840 *bp++ = htonl(FSGIVEUPALLCALLBACKS);
1841
1842 /* Can't take a ref on server */
1843 afs_make_call(ac, call, GFP_NOFS);
1844 return afs_wait_for_call_to_complete(call, ac);
1845}
1846
1847/*
1848 * Deliver reply data to an FS.GetCapabilities operation.
1849 */
1850static int afs_deliver_fs_get_capabilities(struct afs_call *call)
1851{
1852 u32 count;
1853 int ret;
1854
1855 _enter("{%u,%zu}", call->unmarshall, iov_iter_count(&call->iter));
1856
1857 switch (call->unmarshall) {
1858 case 0:
1859 afs_extract_to_tmp(call);
1860 call->unmarshall++;
1861 /* Fall through */
1862
1863 /* Extract the capabilities word count */
1864 case 1:
1865 ret = afs_extract_data(call, true);
1866 if (ret < 0)
1867 return ret;
1868
1869 count = ntohl(call->tmp);
1870
1871 call->count = count;
1872 call->count2 = count;
1873 afs_extract_discard(call, count * sizeof(__be32));
1874 call->unmarshall++;
1875 /* Fall through */
1876
1877 /* Extract capabilities words */
1878 case 2:
1879 ret = afs_extract_data(call, false);
1880 if (ret < 0)
1881 return ret;
1882
1883 /* TODO: Examine capabilities */
1884
1885 call->unmarshall++;
1886 break;
1887 }
1888
1889 _leave(" = 0 [done]");
1890 return 0;
1891}
1892
1893/*
1894 * FS.GetCapabilities operation type
1895 */
1896static const struct afs_call_type afs_RXFSGetCapabilities = {
1897 .name = "FS.GetCapabilities",
1898 .op = afs_FS_GetCapabilities,
1899 .deliver = afs_deliver_fs_get_capabilities,
1900 .done = afs_fileserver_probe_result,
1901 .destructor = afs_flat_call_destructor,
1902};
1903
1904/*
1905 * Probe a fileserver for the capabilities that it supports. This can
1906 * return up to 196 words.
1907 */
1908struct afs_call *afs_fs_get_capabilities(struct afs_net *net,
1909 struct afs_server *server,
1910 struct afs_addr_cursor *ac,
1911 struct key *key,
1912 unsigned int server_index)
1913{
1914 struct afs_call *call;
1915 __be32 *bp;
1916
1917 _enter("");
1918
1919 call = afs_alloc_flat_call(net, &afs_RXFSGetCapabilities, 1 * 4, 16 * 4);
1920 if (!call)
1921 return ERR_PTR(-ENOMEM);
1922
1923 call->key = key;
1924 call->server = afs_get_server(server, afs_server_trace_get_caps);
1925 call->server_index = server_index;
1926 call->upgrade = true;
1927 call->async = true;
1928 call->max_lifespan = AFS_PROBE_MAX_LIFESPAN;
1929
1930 /* marshall the parameters */
1931 bp = call->request;
1932 *bp++ = htonl(FSGETCAPABILITIES);
1933
1934 /* Can't take a ref on server */
1935 trace_afs_make_fs_call(call, NULL);
1936 afs_make_call(ac, call, GFP_NOFS);
1937 return call;
1938}
1939
1940/*
1941 * Deliver reply data to an FS.FetchStatus with no vnode.
1942 */
1943static int afs_deliver_fs_fetch_status(struct afs_call *call)
1944{
1945 const __be32 *bp;
1946 int ret;
1947
1948 ret = afs_transfer_reply(call);
1949 if (ret < 0)
1950 return ret;
1951
1952 /* unmarshall the reply once we've received all of it */
1953 bp = call->buffer;
1954 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
1955 if (ret < 0)
1956 return ret;
1957 xdr_decode_AFSCallBack(&bp, call, call->out_scb);
1958 xdr_decode_AFSVolSync(&bp, call->out_volsync);
1959
1960 _leave(" = 0 [done]");
1961 return 0;
1962}
1963
1964/*
1965 * FS.FetchStatus operation type
1966 */
1967static const struct afs_call_type afs_RXFSFetchStatus = {
1968 .name = "FS.FetchStatus",
1969 .op = afs_FS_FetchStatus,
1970 .deliver = afs_deliver_fs_fetch_status,
1971 .destructor = afs_flat_call_destructor,
1972};
1973
1974/*
1975 * Fetch the status information for a fid without needing a vnode handle.
1976 */
1977int afs_fs_fetch_status(struct afs_fs_cursor *fc,
1978 struct afs_net *net,
1979 struct afs_fid *fid,
1980 struct afs_status_cb *scb,
1981 struct afs_volsync *volsync)
1982{
1983 struct afs_call *call;
1984 __be32 *bp;
1985
1986 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
1987 return yfs_fs_fetch_status(fc, net, fid, scb, volsync);
1988
1989 _enter(",%x,{%llx:%llu},,",
1990 key_serial(fc->key), fid->vid, fid->vnode);
1991
1992 call = afs_alloc_flat_call(net, &afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4);
1993 if (!call) {
1994 fc->ac.error = -ENOMEM;
1995 return -ENOMEM;
1996 }
1997
1998 call->key = fc->key;
1999 call->out_fid = fid;
2000 call->out_scb = scb;
2001 call->out_volsync = volsync;
2002
2003 /* marshall the parameters */
2004 bp = call->request;
2005 bp[0] = htonl(FSFETCHSTATUS);
2006 bp[1] = htonl(fid->vid);
2007 bp[2] = htonl(fid->vnode);
2008 bp[3] = htonl(fid->unique);
2009
2010 afs_use_fs_server(call, fc->cbi);
2011 trace_afs_make_fs_call(call, fid);
2012 afs_set_fc_call(call, fc);
2013 afs_make_call(&fc->ac, call, GFP_NOFS);
2014 return afs_wait_for_call_to_complete(call, &fc->ac);
2015}
2016
2017/*
2018 * Deliver reply data to an FS.InlineBulkStatus call
2019 */
2020static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
2021{
2022 struct afs_status_cb *scb;
2023 const __be32 *bp;
2024 u32 tmp;
2025 int ret;
2026
2027 _enter("{%u}", call->unmarshall);
2028
2029 switch (call->unmarshall) {
2030 case 0:
2031 afs_extract_to_tmp(call);
2032 call->unmarshall++;
2033 /* Fall through */
2034
2035 /* Extract the file status count and array in two steps */
2036 case 1:
2037 _debug("extract status count");
2038 ret = afs_extract_data(call, true);
2039 if (ret < 0)
2040 return ret;
2041
2042 tmp = ntohl(call->tmp);
2043 _debug("status count: %u/%u", tmp, call->count2);
2044 if (tmp != call->count2)
2045 return afs_protocol_error(call, -EBADMSG,
2046 afs_eproto_ibulkst_count);
2047
2048 call->count = 0;
2049 call->unmarshall++;
2050 more_counts:
2051 afs_extract_to_buf(call, 21 * sizeof(__be32));
2052 /* Fall through */
2053
2054 case 2:
2055 _debug("extract status array %u", call->count);
2056 ret = afs_extract_data(call, true);
2057 if (ret < 0)
2058 return ret;
2059
2060 bp = call->buffer;
2061 scb = &call->out_scb[call->count];
2062 ret = xdr_decode_AFSFetchStatus(&bp, call, scb);
2063 if (ret < 0)
2064 return ret;
2065
2066 call->count++;
2067 if (call->count < call->count2)
2068 goto more_counts;
2069
2070 call->count = 0;
2071 call->unmarshall++;
2072 afs_extract_to_tmp(call);
2073 /* Fall through */
2074
2075 /* Extract the callback count and array in two steps */
2076 case 3:
2077 _debug("extract CB count");
2078 ret = afs_extract_data(call, true);
2079 if (ret < 0)
2080 return ret;
2081
2082 tmp = ntohl(call->tmp);
2083 _debug("CB count: %u", tmp);
2084 if (tmp != call->count2)
2085 return afs_protocol_error(call, -EBADMSG,
2086 afs_eproto_ibulkst_cb_count);
2087 call->count = 0;
2088 call->unmarshall++;
2089 more_cbs:
2090 afs_extract_to_buf(call, 3 * sizeof(__be32));
2091 /* Fall through */
2092
2093 case 4:
2094 _debug("extract CB array");
2095 ret = afs_extract_data(call, true);
2096 if (ret < 0)
2097 return ret;
2098
2099 _debug("unmarshall CB array");
2100 bp = call->buffer;
2101 scb = &call->out_scb[call->count];
2102 xdr_decode_AFSCallBack(&bp, call, scb);
2103 call->count++;
2104 if (call->count < call->count2)
2105 goto more_cbs;
2106
2107 afs_extract_to_buf(call, 6 * sizeof(__be32));
2108 call->unmarshall++;
2109 /* Fall through */
2110
2111 case 5:
2112 ret = afs_extract_data(call, false);
2113 if (ret < 0)
2114 return ret;
2115
2116 bp = call->buffer;
2117 xdr_decode_AFSVolSync(&bp, call->out_volsync);
2118
2119 call->unmarshall++;
2120
2121 case 6:
2122 break;
2123 }
2124
2125 _leave(" = 0 [done]");
2126 return 0;
2127}
2128
2129/*
2130 * FS.InlineBulkStatus operation type
2131 */
2132static const struct afs_call_type afs_RXFSInlineBulkStatus = {
2133 .name = "FS.InlineBulkStatus",
2134 .op = afs_FS_InlineBulkStatus,
2135 .deliver = afs_deliver_fs_inline_bulk_status,
2136 .destructor = afs_flat_call_destructor,
2137};
2138
2139/*
2140 * Fetch the status information for up to 50 files
2141 */
2142int afs_fs_inline_bulk_status(struct afs_fs_cursor *fc,
2143 struct afs_net *net,
2144 struct afs_fid *fids,
2145 struct afs_status_cb *statuses,
2146 unsigned int nr_fids,
2147 struct afs_volsync *volsync)
2148{
2149 struct afs_call *call;
2150 __be32 *bp;
2151 int i;
2152
2153 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
2154 return yfs_fs_inline_bulk_status(fc, net, fids, statuses,
2155 nr_fids, volsync);
2156
2157 _enter(",%x,{%llx:%llu},%u",
2158 key_serial(fc->key), fids[0].vid, fids[1].vnode, nr_fids);
2159
2160 call = afs_alloc_flat_call(net, &afs_RXFSInlineBulkStatus,
2161 (2 + nr_fids * 3) * 4,
2162 21 * 4);
2163 if (!call) {
2164 fc->ac.error = -ENOMEM;
2165 return -ENOMEM;
2166 }
2167
2168 call->key = fc->key;
2169 call->out_scb = statuses;
2170 call->out_volsync = volsync;
2171 call->count2 = nr_fids;
2172
2173 /* marshall the parameters */
2174 bp = call->request;
2175 *bp++ = htonl(FSINLINEBULKSTATUS);
2176 *bp++ = htonl(nr_fids);
2177 for (i = 0; i < nr_fids; i++) {
2178 *bp++ = htonl(fids[i].vid);
2179 *bp++ = htonl(fids[i].vnode);
2180 *bp++ = htonl(fids[i].unique);
2181 }
2182
2183 afs_use_fs_server(call, fc->cbi);
2184 trace_afs_make_fs_call(call, &fids[0]);
2185 afs_set_fc_call(call, fc);
2186 afs_make_call(&fc->ac, call, GFP_NOFS);
2187 return afs_wait_for_call_to_complete(call, &fc->ac);
2188}
2189
2190/*
2191 * deliver reply data to an FS.FetchACL
2192 */
2193static int afs_deliver_fs_fetch_acl(struct afs_call *call)
2194{
2195 struct afs_acl *acl;
2196 const __be32 *bp;
2197 unsigned int size;
2198 int ret;
2199
2200 _enter("{%u}", call->unmarshall);
2201
2202 switch (call->unmarshall) {
2203 case 0:
2204 afs_extract_to_tmp(call);
2205 call->unmarshall++;
2206 /* Fall through */
2207
2208 /* extract the returned data length */
2209 case 1:
2210 ret = afs_extract_data(call, true);
2211 if (ret < 0)
2212 return ret;
2213
2214 size = call->count2 = ntohl(call->tmp);
2215 size = round_up(size, 4);
2216
2217 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
2218 if (!acl)
2219 return -ENOMEM;
2220 call->ret_acl = acl;
2221 acl->size = call->count2;
2222 afs_extract_begin(call, acl->data, size);
2223 call->unmarshall++;
2224 /* Fall through */
2225
2226 /* extract the returned data */
2227 case 2:
2228 ret = afs_extract_data(call, true);
2229 if (ret < 0)
2230 return ret;
2231
2232 afs_extract_to_buf(call, (21 + 6) * 4);
2233 call->unmarshall++;
2234 /* Fall through */
2235
2236 /* extract the metadata */
2237 case 3:
2238 ret = afs_extract_data(call, false);
2239 if (ret < 0)
2240 return ret;
2241
2242 bp = call->buffer;
2243 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
2244 if (ret < 0)
2245 return ret;
2246 xdr_decode_AFSVolSync(&bp, call->out_volsync);
2247
2248 call->unmarshall++;
2249
2250 case 4:
2251 break;
2252 }
2253
2254 _leave(" = 0 [done]");
2255 return 0;
2256}
2257
2258static void afs_destroy_fs_fetch_acl(struct afs_call *call)
2259{
2260 kfree(call->ret_acl);
2261 afs_flat_call_destructor(call);
2262}
2263
2264/*
2265 * FS.FetchACL operation type
2266 */
2267static const struct afs_call_type afs_RXFSFetchACL = {
2268 .name = "FS.FetchACL",
2269 .op = afs_FS_FetchACL,
2270 .deliver = afs_deliver_fs_fetch_acl,
2271 .destructor = afs_destroy_fs_fetch_acl,
2272};
2273
2274/*
2275 * Fetch the ACL for a file.
2276 */
2277struct afs_acl *afs_fs_fetch_acl(struct afs_fs_cursor *fc,
2278 struct afs_status_cb *scb)
2279{
2280 struct afs_vnode *vnode = fc->vnode;
2281 struct afs_call *call;
2282 struct afs_net *net = afs_v2net(vnode);
2283 __be32 *bp;
2284
2285 _enter(",%x,{%llx:%llu},,",
2286 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
2287
2288 call = afs_alloc_flat_call(net, &afs_RXFSFetchACL, 16, (21 + 6) * 4);
2289 if (!call) {
2290 fc->ac.error = -ENOMEM;
2291 return ERR_PTR(-ENOMEM);
2292 }
2293
2294 call->key = fc->key;
2295 call->ret_acl = NULL;
2296 call->out_scb = scb;
2297 call->out_volsync = NULL;
2298
2299 /* marshall the parameters */
2300 bp = call->request;
2301 bp[0] = htonl(FSFETCHACL);
2302 bp[1] = htonl(vnode->fid.vid);
2303 bp[2] = htonl(vnode->fid.vnode);
2304 bp[3] = htonl(vnode->fid.unique);
2305
2306 afs_use_fs_server(call, fc->cbi);
2307 trace_afs_make_fs_call(call, &vnode->fid);
2308 afs_make_call(&fc->ac, call, GFP_KERNEL);
2309 return (struct afs_acl *)afs_wait_for_call_to_complete(call, &fc->ac);
2310}
2311
2312/*
2313 * Deliver reply data to any operation that returns file status and volume
2314 * sync.
2315 */
2316static int afs_deliver_fs_file_status_and_vol(struct afs_call *call)
2317{
2318 const __be32 *bp;
2319 int ret;
2320
2321 ret = afs_transfer_reply(call);
2322 if (ret < 0)
2323 return ret;
2324
2325 bp = call->buffer;
2326 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
2327 if (ret < 0)
2328 return ret;
2329 xdr_decode_AFSVolSync(&bp, call->out_volsync);
2330
2331 _leave(" = 0 [done]");
2332 return 0;
2333}
2334
2335/*
2336 * FS.StoreACL operation type
2337 */
2338static const struct afs_call_type afs_RXFSStoreACL = {
2339 .name = "FS.StoreACL",
2340 .op = afs_FS_StoreACL,
2341 .deliver = afs_deliver_fs_file_status_and_vol,
2342 .destructor = afs_flat_call_destructor,
2343};
2344
2345/*
2346 * Fetch the ACL for a file.
2347 */
2348int afs_fs_store_acl(struct afs_fs_cursor *fc, const struct afs_acl *acl,
2349 struct afs_status_cb *scb)
2350{
2351 struct afs_vnode *vnode = fc->vnode;
2352 struct afs_call *call;
2353 struct afs_net *net = afs_v2net(vnode);
2354 size_t size;
2355 __be32 *bp;
2356
2357 _enter(",%x,{%llx:%llu},,",
2358 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
2359
2360 size = round_up(acl->size, 4);
2361 call = afs_alloc_flat_call(net, &afs_RXFSStoreACL,
2362 5 * 4 + size, (21 + 6) * 4);
2363 if (!call) {
2364 fc->ac.error = -ENOMEM;
2365 return -ENOMEM;
2366 }
2367
2368 call->key = fc->key;
2369 call->out_scb = scb;
2370 call->out_volsync = NULL;
2371
2372 /* marshall the parameters */
2373 bp = call->request;
2374 bp[0] = htonl(FSSTOREACL);
2375 bp[1] = htonl(vnode->fid.vid);
2376 bp[2] = htonl(vnode->fid.vnode);
2377 bp[3] = htonl(vnode->fid.unique);
2378 bp[4] = htonl(acl->size);
2379 memcpy(&bp[5], acl->data, acl->size);
2380 if (acl->size != size)
2381 memset((void *)&bp[5] + acl->size, 0, size - acl->size);
2382
2383 trace_afs_make_fs_call(call, &vnode->fid);
2384 afs_make_call(&fc->ac, call, GFP_KERNEL);
2385 return afs_wait_for_call_to_complete(call, &fc->ac);
2386}