Loading...
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/* AFS File Server client stubs
2 *
3 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12#include <linux/init.h>
13#include <linux/slab.h>
14#include <linux/sched.h>
15#include <linux/circ_buf.h>
16#include "internal.h"
17#include "afs_fs.h"
18
19/*
20 * decode an AFSFid block
21 */
22static void xdr_decode_AFSFid(const __be32 **_bp, struct afs_fid *fid)
23{
24 const __be32 *bp = *_bp;
25
26 fid->vid = ntohl(*bp++);
27 fid->vnode = ntohl(*bp++);
28 fid->unique = ntohl(*bp++);
29 *_bp = bp;
30}
31
32/*
33 * decode an AFSFetchStatus block
34 */
35static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
36 struct afs_file_status *status,
37 struct afs_vnode *vnode,
38 afs_dataversion_t *store_version)
39{
40 afs_dataversion_t expected_version;
41 const __be32 *bp = *_bp;
42 umode_t mode;
43 u64 data_version, size;
44 u32 changed = 0; /* becomes non-zero if ctime-type changes seen */
45 kuid_t owner;
46 kgid_t group;
47
48#define EXTRACT(DST) \
49 do { \
50 u32 x = ntohl(*bp++); \
51 changed |= DST - x; \
52 DST = x; \
53 } while (0)
54
55 status->if_version = ntohl(*bp++);
56 EXTRACT(status->type);
57 EXTRACT(status->nlink);
58 size = ntohl(*bp++);
59 data_version = ntohl(*bp++);
60 EXTRACT(status->author);
61 owner = make_kuid(&init_user_ns, ntohl(*bp++));
62 changed |= !uid_eq(owner, status->owner);
63 status->owner = owner;
64 EXTRACT(status->caller_access); /* call ticket dependent */
65 EXTRACT(status->anon_access);
66 EXTRACT(status->mode);
67 EXTRACT(status->parent.vnode);
68 EXTRACT(status->parent.unique);
69 bp++; /* seg size */
70 status->mtime_client = ntohl(*bp++);
71 status->mtime_server = ntohl(*bp++);
72 group = make_kgid(&init_user_ns, ntohl(*bp++));
73 changed |= !gid_eq(group, status->group);
74 status->group = group;
75 bp++; /* sync counter */
76 data_version |= (u64) ntohl(*bp++) << 32;
77 EXTRACT(status->lock_count);
78 size |= (u64) ntohl(*bp++) << 32;
79 bp++; /* spare 4 */
80 *_bp = bp;
81
82 if (size != status->size) {
83 status->size = size;
84 changed |= true;
85 }
86 status->mode &= S_IALLUGO;
87
88 _debug("vnode time %lx, %lx",
89 status->mtime_client, status->mtime_server);
90
91 if (vnode) {
92 status->parent.vid = vnode->fid.vid;
93 if (changed && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
94 _debug("vnode changed");
95 i_size_write(&vnode->vfs_inode, size);
96 vnode->vfs_inode.i_uid = status->owner;
97 vnode->vfs_inode.i_gid = status->group;
98 vnode->vfs_inode.i_generation = vnode->fid.unique;
99 set_nlink(&vnode->vfs_inode, status->nlink);
100
101 mode = vnode->vfs_inode.i_mode;
102 mode &= ~S_IALLUGO;
103 mode |= status->mode;
104 barrier();
105 vnode->vfs_inode.i_mode = mode;
106 }
107
108 vnode->vfs_inode.i_ctime.tv_sec = status->mtime_server;
109 vnode->vfs_inode.i_mtime = vnode->vfs_inode.i_ctime;
110 vnode->vfs_inode.i_atime = vnode->vfs_inode.i_ctime;
111 vnode->vfs_inode.i_version = data_version;
112 }
113
114 expected_version = status->data_version;
115 if (store_version)
116 expected_version = *store_version;
117
118 if (expected_version != data_version) {
119 status->data_version = data_version;
120 if (vnode && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
121 _debug("vnode modified %llx on {%x:%u}",
122 (unsigned long long) data_version,
123 vnode->fid.vid, vnode->fid.vnode);
124 set_bit(AFS_VNODE_MODIFIED, &vnode->flags);
125 set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags);
126 }
127 } else if (store_version) {
128 status->data_version = data_version;
129 }
130}
131
132/*
133 * decode an AFSCallBack block
134 */
135static void xdr_decode_AFSCallBack(const __be32 **_bp, struct afs_vnode *vnode)
136{
137 const __be32 *bp = *_bp;
138
139 vnode->cb_version = ntohl(*bp++);
140 vnode->cb_expiry = ntohl(*bp++);
141 vnode->cb_type = ntohl(*bp++);
142 vnode->cb_expires = vnode->cb_expiry + get_seconds();
143 *_bp = bp;
144}
145
146static void xdr_decode_AFSCallBack_raw(const __be32 **_bp,
147 struct afs_callback *cb)
148{
149 const __be32 *bp = *_bp;
150
151 cb->version = ntohl(*bp++);
152 cb->expiry = ntohl(*bp++);
153 cb->type = ntohl(*bp++);
154 *_bp = bp;
155}
156
157/*
158 * decode an AFSVolSync block
159 */
160static void xdr_decode_AFSVolSync(const __be32 **_bp,
161 struct afs_volsync *volsync)
162{
163 const __be32 *bp = *_bp;
164
165 volsync->creation = ntohl(*bp++);
166 bp++; /* spare2 */
167 bp++; /* spare3 */
168 bp++; /* spare4 */
169 bp++; /* spare5 */
170 bp++; /* spare6 */
171 *_bp = bp;
172}
173
174/*
175 * encode the requested attributes into an AFSStoreStatus block
176 */
177static void xdr_encode_AFS_StoreStatus(__be32 **_bp, struct iattr *attr)
178{
179 __be32 *bp = *_bp;
180 u32 mask = 0, mtime = 0, owner = 0, group = 0, mode = 0;
181
182 mask = 0;
183 if (attr->ia_valid & ATTR_MTIME) {
184 mask |= AFS_SET_MTIME;
185 mtime = attr->ia_mtime.tv_sec;
186 }
187
188 if (attr->ia_valid & ATTR_UID) {
189 mask |= AFS_SET_OWNER;
190 owner = from_kuid(&init_user_ns, attr->ia_uid);
191 }
192
193 if (attr->ia_valid & ATTR_GID) {
194 mask |= AFS_SET_GROUP;
195 group = from_kgid(&init_user_ns, attr->ia_gid);
196 }
197
198 if (attr->ia_valid & ATTR_MODE) {
199 mask |= AFS_SET_MODE;
200 mode = attr->ia_mode & S_IALLUGO;
201 }
202
203 *bp++ = htonl(mask);
204 *bp++ = htonl(mtime);
205 *bp++ = htonl(owner);
206 *bp++ = htonl(group);
207 *bp++ = htonl(mode);
208 *bp++ = 0; /* segment size */
209 *_bp = bp;
210}
211
212/*
213 * decode an AFSFetchVolumeStatus block
214 */
215static void xdr_decode_AFSFetchVolumeStatus(const __be32 **_bp,
216 struct afs_volume_status *vs)
217{
218 const __be32 *bp = *_bp;
219
220 vs->vid = ntohl(*bp++);
221 vs->parent_id = ntohl(*bp++);
222 vs->online = ntohl(*bp++);
223 vs->in_service = ntohl(*bp++);
224 vs->blessed = ntohl(*bp++);
225 vs->needs_salvage = ntohl(*bp++);
226 vs->type = ntohl(*bp++);
227 vs->min_quota = ntohl(*bp++);
228 vs->max_quota = ntohl(*bp++);
229 vs->blocks_in_use = ntohl(*bp++);
230 vs->part_blocks_avail = ntohl(*bp++);
231 vs->part_max_blocks = ntohl(*bp++);
232 *_bp = bp;
233}
234
235/*
236 * deliver reply data to an FS.FetchStatus
237 */
238static int afs_deliver_fs_fetch_status(struct afs_call *call,
239 struct sk_buff *skb, bool last)
240{
241 struct afs_vnode *vnode = call->reply;
242 const __be32 *bp;
243
244 _enter(",,%u", last);
245
246 afs_transfer_reply(call, skb);
247 if (!last)
248 return 0;
249
250 if (call->reply_size != call->reply_max)
251 return -EBADMSG;
252
253 /* unmarshall the reply once we've received all of it */
254 bp = call->buffer;
255 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
256 xdr_decode_AFSCallBack(&bp, vnode);
257 if (call->reply2)
258 xdr_decode_AFSVolSync(&bp, call->reply2);
259
260 _leave(" = 0 [done]");
261 return 0;
262}
263
264/*
265 * FS.FetchStatus operation type
266 */
267static const struct afs_call_type afs_RXFSFetchStatus = {
268 .name = "FS.FetchStatus",
269 .deliver = afs_deliver_fs_fetch_status,
270 .abort_to_error = afs_abort_to_error,
271 .destructor = afs_flat_call_destructor,
272};
273
274/*
275 * fetch the status information for a file
276 */
277int afs_fs_fetch_file_status(struct afs_server *server,
278 struct key *key,
279 struct afs_vnode *vnode,
280 struct afs_volsync *volsync,
281 const struct afs_wait_mode *wait_mode)
282{
283 struct afs_call *call;
284 __be32 *bp;
285
286 _enter(",%x,{%x:%u},,",
287 key_serial(key), vnode->fid.vid, vnode->fid.vnode);
288
289 call = afs_alloc_flat_call(&afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4);
290 if (!call)
291 return -ENOMEM;
292
293 call->key = key;
294 call->reply = vnode;
295 call->reply2 = volsync;
296 call->service_id = FS_SERVICE;
297 call->port = htons(AFS_FS_PORT);
298
299 /* marshall the parameters */
300 bp = call->request;
301 bp[0] = htonl(FSFETCHSTATUS);
302 bp[1] = htonl(vnode->fid.vid);
303 bp[2] = htonl(vnode->fid.vnode);
304 bp[3] = htonl(vnode->fid.unique);
305
306 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
307}
308
309/*
310 * deliver reply data to an FS.FetchData
311 */
312static int afs_deliver_fs_fetch_data(struct afs_call *call,
313 struct sk_buff *skb, bool last)
314{
315 struct afs_vnode *vnode = call->reply;
316 const __be32 *bp;
317 struct page *page;
318 void *buffer;
319 int ret;
320
321 _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
322
323 switch (call->unmarshall) {
324 case 0:
325 call->offset = 0;
326 call->unmarshall++;
327 if (call->operation_ID != FSFETCHDATA64) {
328 call->unmarshall++;
329 goto no_msw;
330 }
331
332 /* extract the upper part of the returned data length of an
333 * FSFETCHDATA64 op (which should always be 0 using this
334 * client) */
335 case 1:
336 _debug("extract data length (MSW)");
337 ret = afs_extract_data(call, skb, last, &call->tmp, 4);
338 switch (ret) {
339 case 0: break;
340 case -EAGAIN: return 0;
341 default: return ret;
342 }
343
344 call->count = ntohl(call->tmp);
345 _debug("DATA length MSW: %u", call->count);
346 if (call->count > 0)
347 return -EBADMSG;
348 call->offset = 0;
349 call->unmarshall++;
350
351 no_msw:
352 /* extract the returned data length */
353 case 2:
354 _debug("extract data length");
355 ret = afs_extract_data(call, skb, last, &call->tmp, 4);
356 switch (ret) {
357 case 0: break;
358 case -EAGAIN: return 0;
359 default: return ret;
360 }
361
362 call->count = ntohl(call->tmp);
363 _debug("DATA length: %u", call->count);
364 if (call->count > PAGE_SIZE)
365 return -EBADMSG;
366 call->offset = 0;
367 call->unmarshall++;
368
369 /* extract the returned data */
370 case 3:
371 _debug("extract data");
372 if (call->count > 0) {
373 page = call->reply3;
374 buffer = kmap_atomic(page);
375 ret = afs_extract_data(call, skb, last, buffer,
376 call->count);
377 kunmap_atomic(buffer);
378 switch (ret) {
379 case 0: break;
380 case -EAGAIN: return 0;
381 default: return ret;
382 }
383 }
384
385 call->offset = 0;
386 call->unmarshall++;
387
388 /* extract the metadata */
389 case 4:
390 ret = afs_extract_data(call, skb, last, call->buffer,
391 (21 + 3 + 6) * 4);
392 switch (ret) {
393 case 0: break;
394 case -EAGAIN: return 0;
395 default: return ret;
396 }
397
398 bp = call->buffer;
399 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
400 xdr_decode_AFSCallBack(&bp, vnode);
401 if (call->reply2)
402 xdr_decode_AFSVolSync(&bp, call->reply2);
403
404 call->offset = 0;
405 call->unmarshall++;
406
407 case 5:
408 _debug("trailer");
409 if (skb->len != 0)
410 return -EBADMSG;
411 break;
412 }
413
414 if (!last)
415 return 0;
416
417 if (call->count < PAGE_SIZE) {
418 _debug("clear");
419 page = call->reply3;
420 buffer = kmap_atomic(page);
421 memset(buffer + call->count, 0, PAGE_SIZE - call->count);
422 kunmap_atomic(buffer);
423 }
424
425 _leave(" = 0 [done]");
426 return 0;
427}
428
429/*
430 * FS.FetchData operation type
431 */
432static const struct afs_call_type afs_RXFSFetchData = {
433 .name = "FS.FetchData",
434 .deliver = afs_deliver_fs_fetch_data,
435 .abort_to_error = afs_abort_to_error,
436 .destructor = afs_flat_call_destructor,
437};
438
439static const struct afs_call_type afs_RXFSFetchData64 = {
440 .name = "FS.FetchData64",
441 .deliver = afs_deliver_fs_fetch_data,
442 .abort_to_error = afs_abort_to_error,
443 .destructor = afs_flat_call_destructor,
444};
445
446/*
447 * fetch data from a very large file
448 */
449static int afs_fs_fetch_data64(struct afs_server *server,
450 struct key *key,
451 struct afs_vnode *vnode,
452 off_t offset, size_t length,
453 struct page *buffer,
454 const struct afs_wait_mode *wait_mode)
455{
456 struct afs_call *call;
457 __be32 *bp;
458
459 _enter("");
460
461 ASSERTCMP(length, <, ULONG_MAX);
462
463 call = afs_alloc_flat_call(&afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4);
464 if (!call)
465 return -ENOMEM;
466
467 call->key = key;
468 call->reply = vnode;
469 call->reply2 = NULL; /* volsync */
470 call->reply3 = buffer;
471 call->service_id = FS_SERVICE;
472 call->port = htons(AFS_FS_PORT);
473 call->operation_ID = FSFETCHDATA64;
474
475 /* marshall the parameters */
476 bp = call->request;
477 bp[0] = htonl(FSFETCHDATA64);
478 bp[1] = htonl(vnode->fid.vid);
479 bp[2] = htonl(vnode->fid.vnode);
480 bp[3] = htonl(vnode->fid.unique);
481 bp[4] = htonl(upper_32_bits(offset));
482 bp[5] = htonl((u32) offset);
483 bp[6] = 0;
484 bp[7] = htonl((u32) length);
485
486 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
487}
488
489/*
490 * fetch data from a file
491 */
492int afs_fs_fetch_data(struct afs_server *server,
493 struct key *key,
494 struct afs_vnode *vnode,
495 off_t offset, size_t length,
496 struct page *buffer,
497 const struct afs_wait_mode *wait_mode)
498{
499 struct afs_call *call;
500 __be32 *bp;
501
502 if (upper_32_bits(offset) || upper_32_bits(offset + length))
503 return afs_fs_fetch_data64(server, key, vnode, offset, length,
504 buffer, wait_mode);
505
506 _enter("");
507
508 call = afs_alloc_flat_call(&afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
509 if (!call)
510 return -ENOMEM;
511
512 call->key = key;
513 call->reply = vnode;
514 call->reply2 = NULL; /* volsync */
515 call->reply3 = buffer;
516 call->service_id = FS_SERVICE;
517 call->port = htons(AFS_FS_PORT);
518 call->operation_ID = FSFETCHDATA;
519
520 /* marshall the parameters */
521 bp = call->request;
522 bp[0] = htonl(FSFETCHDATA);
523 bp[1] = htonl(vnode->fid.vid);
524 bp[2] = htonl(vnode->fid.vnode);
525 bp[3] = htonl(vnode->fid.unique);
526 bp[4] = htonl(offset);
527 bp[5] = htonl(length);
528
529 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
530}
531
532/*
533 * deliver reply data to an FS.GiveUpCallBacks
534 */
535static int afs_deliver_fs_give_up_callbacks(struct afs_call *call,
536 struct sk_buff *skb, bool last)
537{
538 _enter(",{%u},%d", skb->len, last);
539
540 if (skb->len > 0)
541 return -EBADMSG; /* shouldn't be any reply data */
542 return 0;
543}
544
545/*
546 * FS.GiveUpCallBacks operation type
547 */
548static const struct afs_call_type afs_RXFSGiveUpCallBacks = {
549 .name = "FS.GiveUpCallBacks",
550 .deliver = afs_deliver_fs_give_up_callbacks,
551 .abort_to_error = afs_abort_to_error,
552 .destructor = afs_flat_call_destructor,
553};
554
555/*
556 * give up a set of callbacks
557 * - the callbacks are held in the server->cb_break ring
558 */
559int afs_fs_give_up_callbacks(struct afs_server *server,
560 const struct afs_wait_mode *wait_mode)
561{
562 struct afs_call *call;
563 size_t ncallbacks;
564 __be32 *bp, *tp;
565 int loop;
566
567 ncallbacks = CIRC_CNT(server->cb_break_head, server->cb_break_tail,
568 ARRAY_SIZE(server->cb_break));
569
570 _enter("{%zu},", ncallbacks);
571
572 if (ncallbacks == 0)
573 return 0;
574 if (ncallbacks > AFSCBMAX)
575 ncallbacks = AFSCBMAX;
576
577 _debug("break %zu callbacks", ncallbacks);
578
579 call = afs_alloc_flat_call(&afs_RXFSGiveUpCallBacks,
580 12 + ncallbacks * 6 * 4, 0);
581 if (!call)
582 return -ENOMEM;
583
584 call->service_id = FS_SERVICE;
585 call->port = htons(AFS_FS_PORT);
586
587 /* marshall the parameters */
588 bp = call->request;
589 tp = bp + 2 + ncallbacks * 3;
590 *bp++ = htonl(FSGIVEUPCALLBACKS);
591 *bp++ = htonl(ncallbacks);
592 *tp++ = htonl(ncallbacks);
593
594 atomic_sub(ncallbacks, &server->cb_break_n);
595 for (loop = ncallbacks; loop > 0; loop--) {
596 struct afs_callback *cb =
597 &server->cb_break[server->cb_break_tail];
598
599 *bp++ = htonl(cb->fid.vid);
600 *bp++ = htonl(cb->fid.vnode);
601 *bp++ = htonl(cb->fid.unique);
602 *tp++ = htonl(cb->version);
603 *tp++ = htonl(cb->expiry);
604 *tp++ = htonl(cb->type);
605 smp_mb();
606 server->cb_break_tail =
607 (server->cb_break_tail + 1) &
608 (ARRAY_SIZE(server->cb_break) - 1);
609 }
610
611 ASSERT(ncallbacks > 0);
612 wake_up_nr(&server->cb_break_waitq, ncallbacks);
613
614 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
615}
616
617/*
618 * deliver reply data to an FS.CreateFile or an FS.MakeDir
619 */
620static int afs_deliver_fs_create_vnode(struct afs_call *call,
621 struct sk_buff *skb, bool last)
622{
623 struct afs_vnode *vnode = call->reply;
624 const __be32 *bp;
625
626 _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
627
628 afs_transfer_reply(call, skb);
629 if (!last)
630 return 0;
631
632 if (call->reply_size != call->reply_max)
633 return -EBADMSG;
634
635 /* unmarshall the reply once we've received all of it */
636 bp = call->buffer;
637 xdr_decode_AFSFid(&bp, call->reply2);
638 xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL, NULL);
639 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
640 xdr_decode_AFSCallBack_raw(&bp, call->reply4);
641 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
642
643 _leave(" = 0 [done]");
644 return 0;
645}
646
647/*
648 * FS.CreateFile and FS.MakeDir operation type
649 */
650static const struct afs_call_type afs_RXFSCreateXXXX = {
651 .name = "FS.CreateXXXX",
652 .deliver = afs_deliver_fs_create_vnode,
653 .abort_to_error = afs_abort_to_error,
654 .destructor = afs_flat_call_destructor,
655};
656
657/*
658 * create a file or make a directory
659 */
660int afs_fs_create(struct afs_server *server,
661 struct key *key,
662 struct afs_vnode *vnode,
663 const char *name,
664 umode_t mode,
665 struct afs_fid *newfid,
666 struct afs_file_status *newstatus,
667 struct afs_callback *newcb,
668 const struct afs_wait_mode *wait_mode)
669{
670 struct afs_call *call;
671 size_t namesz, reqsz, padsz;
672 __be32 *bp;
673
674 _enter("");
675
676 namesz = strlen(name);
677 padsz = (4 - (namesz & 3)) & 3;
678 reqsz = (5 * 4) + namesz + padsz + (6 * 4);
679
680 call = afs_alloc_flat_call(&afs_RXFSCreateXXXX, reqsz,
681 (3 + 21 + 21 + 3 + 6) * 4);
682 if (!call)
683 return -ENOMEM;
684
685 call->key = key;
686 call->reply = vnode;
687 call->reply2 = newfid;
688 call->reply3 = newstatus;
689 call->reply4 = newcb;
690 call->service_id = FS_SERVICE;
691 call->port = htons(AFS_FS_PORT);
692
693 /* marshall the parameters */
694 bp = call->request;
695 *bp++ = htonl(S_ISDIR(mode) ? FSMAKEDIR : FSCREATEFILE);
696 *bp++ = htonl(vnode->fid.vid);
697 *bp++ = htonl(vnode->fid.vnode);
698 *bp++ = htonl(vnode->fid.unique);
699 *bp++ = htonl(namesz);
700 memcpy(bp, name, namesz);
701 bp = (void *) bp + namesz;
702 if (padsz > 0) {
703 memset(bp, 0, padsz);
704 bp = (void *) bp + padsz;
705 }
706 *bp++ = htonl(AFS_SET_MODE);
707 *bp++ = 0; /* mtime */
708 *bp++ = 0; /* owner */
709 *bp++ = 0; /* group */
710 *bp++ = htonl(mode & S_IALLUGO); /* unix mode */
711 *bp++ = 0; /* segment size */
712
713 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
714}
715
716/*
717 * deliver reply data to an FS.RemoveFile or FS.RemoveDir
718 */
719static int afs_deliver_fs_remove(struct afs_call *call,
720 struct sk_buff *skb, bool last)
721{
722 struct afs_vnode *vnode = call->reply;
723 const __be32 *bp;
724
725 _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
726
727 afs_transfer_reply(call, skb);
728 if (!last)
729 return 0;
730
731 if (call->reply_size != call->reply_max)
732 return -EBADMSG;
733
734 /* unmarshall the reply once we've received all of it */
735 bp = call->buffer;
736 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
737 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
738
739 _leave(" = 0 [done]");
740 return 0;
741}
742
743/*
744 * FS.RemoveDir/FS.RemoveFile operation type
745 */
746static const struct afs_call_type afs_RXFSRemoveXXXX = {
747 .name = "FS.RemoveXXXX",
748 .deliver = afs_deliver_fs_remove,
749 .abort_to_error = afs_abort_to_error,
750 .destructor = afs_flat_call_destructor,
751};
752
753/*
754 * remove a file or directory
755 */
756int afs_fs_remove(struct afs_server *server,
757 struct key *key,
758 struct afs_vnode *vnode,
759 const char *name,
760 bool isdir,
761 const struct afs_wait_mode *wait_mode)
762{
763 struct afs_call *call;
764 size_t namesz, reqsz, padsz;
765 __be32 *bp;
766
767 _enter("");
768
769 namesz = strlen(name);
770 padsz = (4 - (namesz & 3)) & 3;
771 reqsz = (5 * 4) + namesz + padsz;
772
773 call = afs_alloc_flat_call(&afs_RXFSRemoveXXXX, reqsz, (21 + 6) * 4);
774 if (!call)
775 return -ENOMEM;
776
777 call->key = key;
778 call->reply = vnode;
779 call->service_id = FS_SERVICE;
780 call->port = htons(AFS_FS_PORT);
781
782 /* marshall the parameters */
783 bp = call->request;
784 *bp++ = htonl(isdir ? FSREMOVEDIR : FSREMOVEFILE);
785 *bp++ = htonl(vnode->fid.vid);
786 *bp++ = htonl(vnode->fid.vnode);
787 *bp++ = htonl(vnode->fid.unique);
788 *bp++ = htonl(namesz);
789 memcpy(bp, name, namesz);
790 bp = (void *) bp + namesz;
791 if (padsz > 0) {
792 memset(bp, 0, padsz);
793 bp = (void *) bp + padsz;
794 }
795
796 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
797}
798
799/*
800 * deliver reply data to an FS.Link
801 */
802static int afs_deliver_fs_link(struct afs_call *call,
803 struct sk_buff *skb, bool last)
804{
805 struct afs_vnode *dvnode = call->reply, *vnode = call->reply2;
806 const __be32 *bp;
807
808 _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
809
810 afs_transfer_reply(call, skb);
811 if (!last)
812 return 0;
813
814 if (call->reply_size != call->reply_max)
815 return -EBADMSG;
816
817 /* unmarshall the reply once we've received all of it */
818 bp = call->buffer;
819 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
820 xdr_decode_AFSFetchStatus(&bp, &dvnode->status, dvnode, NULL);
821 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
822
823 _leave(" = 0 [done]");
824 return 0;
825}
826
827/*
828 * FS.Link operation type
829 */
830static const struct afs_call_type afs_RXFSLink = {
831 .name = "FS.Link",
832 .deliver = afs_deliver_fs_link,
833 .abort_to_error = afs_abort_to_error,
834 .destructor = afs_flat_call_destructor,
835};
836
837/*
838 * make a hard link
839 */
840int afs_fs_link(struct afs_server *server,
841 struct key *key,
842 struct afs_vnode *dvnode,
843 struct afs_vnode *vnode,
844 const char *name,
845 const struct afs_wait_mode *wait_mode)
846{
847 struct afs_call *call;
848 size_t namesz, reqsz, padsz;
849 __be32 *bp;
850
851 _enter("");
852
853 namesz = strlen(name);
854 padsz = (4 - (namesz & 3)) & 3;
855 reqsz = (5 * 4) + namesz + padsz + (3 * 4);
856
857 call = afs_alloc_flat_call(&afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
858 if (!call)
859 return -ENOMEM;
860
861 call->key = key;
862 call->reply = dvnode;
863 call->reply2 = vnode;
864 call->service_id = FS_SERVICE;
865 call->port = htons(AFS_FS_PORT);
866
867 /* marshall the parameters */
868 bp = call->request;
869 *bp++ = htonl(FSLINK);
870 *bp++ = htonl(dvnode->fid.vid);
871 *bp++ = htonl(dvnode->fid.vnode);
872 *bp++ = htonl(dvnode->fid.unique);
873 *bp++ = htonl(namesz);
874 memcpy(bp, name, namesz);
875 bp = (void *) bp + namesz;
876 if (padsz > 0) {
877 memset(bp, 0, padsz);
878 bp = (void *) bp + padsz;
879 }
880 *bp++ = htonl(vnode->fid.vid);
881 *bp++ = htonl(vnode->fid.vnode);
882 *bp++ = htonl(vnode->fid.unique);
883
884 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
885}
886
887/*
888 * deliver reply data to an FS.Symlink
889 */
890static int afs_deliver_fs_symlink(struct afs_call *call,
891 struct sk_buff *skb, bool last)
892{
893 struct afs_vnode *vnode = call->reply;
894 const __be32 *bp;
895
896 _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
897
898 afs_transfer_reply(call, skb);
899 if (!last)
900 return 0;
901
902 if (call->reply_size != call->reply_max)
903 return -EBADMSG;
904
905 /* unmarshall the reply once we've received all of it */
906 bp = call->buffer;
907 xdr_decode_AFSFid(&bp, call->reply2);
908 xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL, NULL);
909 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
910 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
911
912 _leave(" = 0 [done]");
913 return 0;
914}
915
916/*
917 * FS.Symlink operation type
918 */
919static const struct afs_call_type afs_RXFSSymlink = {
920 .name = "FS.Symlink",
921 .deliver = afs_deliver_fs_symlink,
922 .abort_to_error = afs_abort_to_error,
923 .destructor = afs_flat_call_destructor,
924};
925
926/*
927 * create a symbolic link
928 */
929int afs_fs_symlink(struct afs_server *server,
930 struct key *key,
931 struct afs_vnode *vnode,
932 const char *name,
933 const char *contents,
934 struct afs_fid *newfid,
935 struct afs_file_status *newstatus,
936 const struct afs_wait_mode *wait_mode)
937{
938 struct afs_call *call;
939 size_t namesz, reqsz, padsz, c_namesz, c_padsz;
940 __be32 *bp;
941
942 _enter("");
943
944 namesz = strlen(name);
945 padsz = (4 - (namesz & 3)) & 3;
946
947 c_namesz = strlen(contents);
948 c_padsz = (4 - (c_namesz & 3)) & 3;
949
950 reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4);
951
952 call = afs_alloc_flat_call(&afs_RXFSSymlink, reqsz,
953 (3 + 21 + 21 + 6) * 4);
954 if (!call)
955 return -ENOMEM;
956
957 call->key = key;
958 call->reply = vnode;
959 call->reply2 = newfid;
960 call->reply3 = newstatus;
961 call->service_id = FS_SERVICE;
962 call->port = htons(AFS_FS_PORT);
963
964 /* marshall the parameters */
965 bp = call->request;
966 *bp++ = htonl(FSSYMLINK);
967 *bp++ = htonl(vnode->fid.vid);
968 *bp++ = htonl(vnode->fid.vnode);
969 *bp++ = htonl(vnode->fid.unique);
970 *bp++ = htonl(namesz);
971 memcpy(bp, name, namesz);
972 bp = (void *) bp + namesz;
973 if (padsz > 0) {
974 memset(bp, 0, padsz);
975 bp = (void *) bp + padsz;
976 }
977 *bp++ = htonl(c_namesz);
978 memcpy(bp, contents, c_namesz);
979 bp = (void *) bp + c_namesz;
980 if (c_padsz > 0) {
981 memset(bp, 0, c_padsz);
982 bp = (void *) bp + c_padsz;
983 }
984 *bp++ = htonl(AFS_SET_MODE);
985 *bp++ = 0; /* mtime */
986 *bp++ = 0; /* owner */
987 *bp++ = 0; /* group */
988 *bp++ = htonl(S_IRWXUGO); /* unix mode */
989 *bp++ = 0; /* segment size */
990
991 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
992}
993
994/*
995 * deliver reply data to an FS.Rename
996 */
997static int afs_deliver_fs_rename(struct afs_call *call,
998 struct sk_buff *skb, bool last)
999{
1000 struct afs_vnode *orig_dvnode = call->reply, *new_dvnode = call->reply2;
1001 const __be32 *bp;
1002
1003 _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
1004
1005 afs_transfer_reply(call, skb);
1006 if (!last)
1007 return 0;
1008
1009 if (call->reply_size != call->reply_max)
1010 return -EBADMSG;
1011
1012 /* unmarshall the reply once we've received all of it */
1013 bp = call->buffer;
1014 xdr_decode_AFSFetchStatus(&bp, &orig_dvnode->status, orig_dvnode, NULL);
1015 if (new_dvnode != orig_dvnode)
1016 xdr_decode_AFSFetchStatus(&bp, &new_dvnode->status, new_dvnode,
1017 NULL);
1018 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
1019
1020 _leave(" = 0 [done]");
1021 return 0;
1022}
1023
1024/*
1025 * FS.Rename operation type
1026 */
1027static const struct afs_call_type afs_RXFSRename = {
1028 .name = "FS.Rename",
1029 .deliver = afs_deliver_fs_rename,
1030 .abort_to_error = afs_abort_to_error,
1031 .destructor = afs_flat_call_destructor,
1032};
1033
1034/*
1035 * create a symbolic link
1036 */
1037int afs_fs_rename(struct afs_server *server,
1038 struct key *key,
1039 struct afs_vnode *orig_dvnode,
1040 const char *orig_name,
1041 struct afs_vnode *new_dvnode,
1042 const char *new_name,
1043 const struct afs_wait_mode *wait_mode)
1044{
1045 struct afs_call *call;
1046 size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz;
1047 __be32 *bp;
1048
1049 _enter("");
1050
1051 o_namesz = strlen(orig_name);
1052 o_padsz = (4 - (o_namesz & 3)) & 3;
1053
1054 n_namesz = strlen(new_name);
1055 n_padsz = (4 - (n_namesz & 3)) & 3;
1056
1057 reqsz = (4 * 4) +
1058 4 + o_namesz + o_padsz +
1059 (3 * 4) +
1060 4 + n_namesz + n_padsz;
1061
1062 call = afs_alloc_flat_call(&afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
1063 if (!call)
1064 return -ENOMEM;
1065
1066 call->key = key;
1067 call->reply = orig_dvnode;
1068 call->reply2 = new_dvnode;
1069 call->service_id = FS_SERVICE;
1070 call->port = htons(AFS_FS_PORT);
1071
1072 /* marshall the parameters */
1073 bp = call->request;
1074 *bp++ = htonl(FSRENAME);
1075 *bp++ = htonl(orig_dvnode->fid.vid);
1076 *bp++ = htonl(orig_dvnode->fid.vnode);
1077 *bp++ = htonl(orig_dvnode->fid.unique);
1078 *bp++ = htonl(o_namesz);
1079 memcpy(bp, orig_name, o_namesz);
1080 bp = (void *) bp + o_namesz;
1081 if (o_padsz > 0) {
1082 memset(bp, 0, o_padsz);
1083 bp = (void *) bp + o_padsz;
1084 }
1085
1086 *bp++ = htonl(new_dvnode->fid.vid);
1087 *bp++ = htonl(new_dvnode->fid.vnode);
1088 *bp++ = htonl(new_dvnode->fid.unique);
1089 *bp++ = htonl(n_namesz);
1090 memcpy(bp, new_name, n_namesz);
1091 bp = (void *) bp + n_namesz;
1092 if (n_padsz > 0) {
1093 memset(bp, 0, n_padsz);
1094 bp = (void *) bp + n_padsz;
1095 }
1096
1097 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1098}
1099
1100/*
1101 * deliver reply data to an FS.StoreData
1102 */
1103static int afs_deliver_fs_store_data(struct afs_call *call,
1104 struct sk_buff *skb, bool last)
1105{
1106 struct afs_vnode *vnode = call->reply;
1107 const __be32 *bp;
1108
1109 _enter(",,%u", last);
1110
1111 afs_transfer_reply(call, skb);
1112 if (!last) {
1113 _leave(" = 0 [more]");
1114 return 0;
1115 }
1116
1117 if (call->reply_size != call->reply_max) {
1118 _leave(" = -EBADMSG [%u != %u]",
1119 call->reply_size, call->reply_max);
1120 return -EBADMSG;
1121 }
1122
1123 /* unmarshall the reply once we've received all of it */
1124 bp = call->buffer;
1125 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
1126 &call->store_version);
1127 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
1128
1129 afs_pages_written_back(vnode, call);
1130
1131 _leave(" = 0 [done]");
1132 return 0;
1133}
1134
1135/*
1136 * FS.StoreData operation type
1137 */
1138static const struct afs_call_type afs_RXFSStoreData = {
1139 .name = "FS.StoreData",
1140 .deliver = afs_deliver_fs_store_data,
1141 .abort_to_error = afs_abort_to_error,
1142 .destructor = afs_flat_call_destructor,
1143};
1144
1145static const struct afs_call_type afs_RXFSStoreData64 = {
1146 .name = "FS.StoreData64",
1147 .deliver = afs_deliver_fs_store_data,
1148 .abort_to_error = afs_abort_to_error,
1149 .destructor = afs_flat_call_destructor,
1150};
1151
1152/*
1153 * store a set of pages to a very large file
1154 */
1155static int afs_fs_store_data64(struct afs_server *server,
1156 struct afs_writeback *wb,
1157 pgoff_t first, pgoff_t last,
1158 unsigned offset, unsigned to,
1159 loff_t size, loff_t pos, loff_t i_size,
1160 const struct afs_wait_mode *wait_mode)
1161{
1162 struct afs_vnode *vnode = wb->vnode;
1163 struct afs_call *call;
1164 __be32 *bp;
1165
1166 _enter(",%x,{%x:%u},,",
1167 key_serial(wb->key), vnode->fid.vid, vnode->fid.vnode);
1168
1169 call = afs_alloc_flat_call(&afs_RXFSStoreData64,
1170 (4 + 6 + 3 * 2) * 4,
1171 (21 + 6) * 4);
1172 if (!call)
1173 return -ENOMEM;
1174
1175 call->wb = wb;
1176 call->key = wb->key;
1177 call->reply = vnode;
1178 call->service_id = FS_SERVICE;
1179 call->port = htons(AFS_FS_PORT);
1180 call->mapping = vnode->vfs_inode.i_mapping;
1181 call->first = first;
1182 call->last = last;
1183 call->first_offset = offset;
1184 call->last_to = to;
1185 call->send_pages = true;
1186 call->store_version = vnode->status.data_version + 1;
1187
1188 /* marshall the parameters */
1189 bp = call->request;
1190 *bp++ = htonl(FSSTOREDATA64);
1191 *bp++ = htonl(vnode->fid.vid);
1192 *bp++ = htonl(vnode->fid.vnode);
1193 *bp++ = htonl(vnode->fid.unique);
1194
1195 *bp++ = 0; /* mask */
1196 *bp++ = 0; /* mtime */
1197 *bp++ = 0; /* owner */
1198 *bp++ = 0; /* group */
1199 *bp++ = 0; /* unix mode */
1200 *bp++ = 0; /* segment size */
1201
1202 *bp++ = htonl(pos >> 32);
1203 *bp++ = htonl((u32) pos);
1204 *bp++ = htonl(size >> 32);
1205 *bp++ = htonl((u32) size);
1206 *bp++ = htonl(i_size >> 32);
1207 *bp++ = htonl((u32) i_size);
1208
1209 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1210}
1211
1212/*
1213 * store a set of pages
1214 */
1215int afs_fs_store_data(struct afs_server *server, struct afs_writeback *wb,
1216 pgoff_t first, pgoff_t last,
1217 unsigned offset, unsigned to,
1218 const struct afs_wait_mode *wait_mode)
1219{
1220 struct afs_vnode *vnode = wb->vnode;
1221 struct afs_call *call;
1222 loff_t size, pos, i_size;
1223 __be32 *bp;
1224
1225 _enter(",%x,{%x:%u},,",
1226 key_serial(wb->key), vnode->fid.vid, vnode->fid.vnode);
1227
1228 size = to - offset;
1229 if (first != last)
1230 size += (loff_t)(last - first) << PAGE_SHIFT;
1231 pos = (loff_t)first << PAGE_SHIFT;
1232 pos += offset;
1233
1234 i_size = i_size_read(&vnode->vfs_inode);
1235 if (pos + size > i_size)
1236 i_size = size + pos;
1237
1238 _debug("size %llx, at %llx, i_size %llx",
1239 (unsigned long long) size, (unsigned long long) pos,
1240 (unsigned long long) i_size);
1241
1242 if (pos >> 32 || i_size >> 32 || size >> 32 || (pos + size) >> 32)
1243 return afs_fs_store_data64(server, wb, first, last, offset, to,
1244 size, pos, i_size, wait_mode);
1245
1246 call = afs_alloc_flat_call(&afs_RXFSStoreData,
1247 (4 + 6 + 3) * 4,
1248 (21 + 6) * 4);
1249 if (!call)
1250 return -ENOMEM;
1251
1252 call->wb = wb;
1253 call->key = wb->key;
1254 call->reply = vnode;
1255 call->service_id = FS_SERVICE;
1256 call->port = htons(AFS_FS_PORT);
1257 call->mapping = vnode->vfs_inode.i_mapping;
1258 call->first = first;
1259 call->last = last;
1260 call->first_offset = offset;
1261 call->last_to = to;
1262 call->send_pages = true;
1263 call->store_version = vnode->status.data_version + 1;
1264
1265 /* marshall the parameters */
1266 bp = call->request;
1267 *bp++ = htonl(FSSTOREDATA);
1268 *bp++ = htonl(vnode->fid.vid);
1269 *bp++ = htonl(vnode->fid.vnode);
1270 *bp++ = htonl(vnode->fid.unique);
1271
1272 *bp++ = 0; /* mask */
1273 *bp++ = 0; /* mtime */
1274 *bp++ = 0; /* owner */
1275 *bp++ = 0; /* group */
1276 *bp++ = 0; /* unix mode */
1277 *bp++ = 0; /* segment size */
1278
1279 *bp++ = htonl(pos);
1280 *bp++ = htonl(size);
1281 *bp++ = htonl(i_size);
1282
1283 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1284}
1285
1286/*
1287 * deliver reply data to an FS.StoreStatus
1288 */
1289static int afs_deliver_fs_store_status(struct afs_call *call,
1290 struct sk_buff *skb, bool last)
1291{
1292 afs_dataversion_t *store_version;
1293 struct afs_vnode *vnode = call->reply;
1294 const __be32 *bp;
1295
1296 _enter(",,%u", last);
1297
1298 afs_transfer_reply(call, skb);
1299 if (!last) {
1300 _leave(" = 0 [more]");
1301 return 0;
1302 }
1303
1304 if (call->reply_size != call->reply_max) {
1305 _leave(" = -EBADMSG [%u != %u]",
1306 call->reply_size, call->reply_max);
1307 return -EBADMSG;
1308 }
1309
1310 /* unmarshall the reply once we've received all of it */
1311 store_version = NULL;
1312 if (call->operation_ID == FSSTOREDATA)
1313 store_version = &call->store_version;
1314
1315 bp = call->buffer;
1316 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, store_version);
1317 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
1318
1319 _leave(" = 0 [done]");
1320 return 0;
1321}
1322
1323/*
1324 * FS.StoreStatus operation type
1325 */
1326static const struct afs_call_type afs_RXFSStoreStatus = {
1327 .name = "FS.StoreStatus",
1328 .deliver = afs_deliver_fs_store_status,
1329 .abort_to_error = afs_abort_to_error,
1330 .destructor = afs_flat_call_destructor,
1331};
1332
1333static const struct afs_call_type afs_RXFSStoreData_as_Status = {
1334 .name = "FS.StoreData",
1335 .deliver = afs_deliver_fs_store_status,
1336 .abort_to_error = afs_abort_to_error,
1337 .destructor = afs_flat_call_destructor,
1338};
1339
1340static const struct afs_call_type afs_RXFSStoreData64_as_Status = {
1341 .name = "FS.StoreData64",
1342 .deliver = afs_deliver_fs_store_status,
1343 .abort_to_error = afs_abort_to_error,
1344 .destructor = afs_flat_call_destructor,
1345};
1346
1347/*
1348 * set the attributes on a very large file, using FS.StoreData rather than
1349 * FS.StoreStatus so as to alter the file size also
1350 */
1351static int afs_fs_setattr_size64(struct afs_server *server, struct key *key,
1352 struct afs_vnode *vnode, struct iattr *attr,
1353 const struct afs_wait_mode *wait_mode)
1354{
1355 struct afs_call *call;
1356 __be32 *bp;
1357
1358 _enter(",%x,{%x:%u},,",
1359 key_serial(key), vnode->fid.vid, vnode->fid.vnode);
1360
1361 ASSERT(attr->ia_valid & ATTR_SIZE);
1362
1363 call = afs_alloc_flat_call(&afs_RXFSStoreData64_as_Status,
1364 (4 + 6 + 3 * 2) * 4,
1365 (21 + 6) * 4);
1366 if (!call)
1367 return -ENOMEM;
1368
1369 call->key = key;
1370 call->reply = vnode;
1371 call->service_id = FS_SERVICE;
1372 call->port = htons(AFS_FS_PORT);
1373 call->store_version = vnode->status.data_version + 1;
1374 call->operation_ID = FSSTOREDATA;
1375
1376 /* marshall the parameters */
1377 bp = call->request;
1378 *bp++ = htonl(FSSTOREDATA64);
1379 *bp++ = htonl(vnode->fid.vid);
1380 *bp++ = htonl(vnode->fid.vnode);
1381 *bp++ = htonl(vnode->fid.unique);
1382
1383 xdr_encode_AFS_StoreStatus(&bp, attr);
1384
1385 *bp++ = 0; /* position of start of write */
1386 *bp++ = 0;
1387 *bp++ = 0; /* size of write */
1388 *bp++ = 0;
1389 *bp++ = htonl(attr->ia_size >> 32); /* new file length */
1390 *bp++ = htonl((u32) attr->ia_size);
1391
1392 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1393}
1394
1395/*
1396 * set the attributes on a file, using FS.StoreData rather than FS.StoreStatus
1397 * so as to alter the file size also
1398 */
1399static int afs_fs_setattr_size(struct afs_server *server, struct key *key,
1400 struct afs_vnode *vnode, struct iattr *attr,
1401 const struct afs_wait_mode *wait_mode)
1402{
1403 struct afs_call *call;
1404 __be32 *bp;
1405
1406 _enter(",%x,{%x:%u},,",
1407 key_serial(key), vnode->fid.vid, vnode->fid.vnode);
1408
1409 ASSERT(attr->ia_valid & ATTR_SIZE);
1410 if (attr->ia_size >> 32)
1411 return afs_fs_setattr_size64(server, key, vnode, attr,
1412 wait_mode);
1413
1414 call = afs_alloc_flat_call(&afs_RXFSStoreData_as_Status,
1415 (4 + 6 + 3) * 4,
1416 (21 + 6) * 4);
1417 if (!call)
1418 return -ENOMEM;
1419
1420 call->key = key;
1421 call->reply = vnode;
1422 call->service_id = FS_SERVICE;
1423 call->port = htons(AFS_FS_PORT);
1424 call->store_version = vnode->status.data_version + 1;
1425 call->operation_ID = FSSTOREDATA;
1426
1427 /* marshall the parameters */
1428 bp = call->request;
1429 *bp++ = htonl(FSSTOREDATA);
1430 *bp++ = htonl(vnode->fid.vid);
1431 *bp++ = htonl(vnode->fid.vnode);
1432 *bp++ = htonl(vnode->fid.unique);
1433
1434 xdr_encode_AFS_StoreStatus(&bp, attr);
1435
1436 *bp++ = 0; /* position of start of write */
1437 *bp++ = 0; /* size of write */
1438 *bp++ = htonl(attr->ia_size); /* new file length */
1439
1440 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1441}
1442
1443/*
1444 * set the attributes on a file, using FS.StoreData if there's a change in file
1445 * size, and FS.StoreStatus otherwise
1446 */
1447int afs_fs_setattr(struct afs_server *server, struct key *key,
1448 struct afs_vnode *vnode, struct iattr *attr,
1449 const struct afs_wait_mode *wait_mode)
1450{
1451 struct afs_call *call;
1452 __be32 *bp;
1453
1454 if (attr->ia_valid & ATTR_SIZE)
1455 return afs_fs_setattr_size(server, key, vnode, attr,
1456 wait_mode);
1457
1458 _enter(",%x,{%x:%u},,",
1459 key_serial(key), vnode->fid.vid, vnode->fid.vnode);
1460
1461 call = afs_alloc_flat_call(&afs_RXFSStoreStatus,
1462 (4 + 6) * 4,
1463 (21 + 6) * 4);
1464 if (!call)
1465 return -ENOMEM;
1466
1467 call->key = key;
1468 call->reply = vnode;
1469 call->service_id = FS_SERVICE;
1470 call->port = htons(AFS_FS_PORT);
1471 call->operation_ID = FSSTORESTATUS;
1472
1473 /* marshall the parameters */
1474 bp = call->request;
1475 *bp++ = htonl(FSSTORESTATUS);
1476 *bp++ = htonl(vnode->fid.vid);
1477 *bp++ = htonl(vnode->fid.vnode);
1478 *bp++ = htonl(vnode->fid.unique);
1479
1480 xdr_encode_AFS_StoreStatus(&bp, attr);
1481
1482 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1483}
1484
1485/*
1486 * deliver reply data to an FS.GetVolumeStatus
1487 */
1488static int afs_deliver_fs_get_volume_status(struct afs_call *call,
1489 struct sk_buff *skb, bool last)
1490{
1491 const __be32 *bp;
1492 char *p;
1493 int ret;
1494
1495 _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
1496
1497 switch (call->unmarshall) {
1498 case 0:
1499 call->offset = 0;
1500 call->unmarshall++;
1501
1502 /* extract the returned status record */
1503 case 1:
1504 _debug("extract status");
1505 ret = afs_extract_data(call, skb, last, call->buffer,
1506 12 * 4);
1507 switch (ret) {
1508 case 0: break;
1509 case -EAGAIN: return 0;
1510 default: return ret;
1511 }
1512
1513 bp = call->buffer;
1514 xdr_decode_AFSFetchVolumeStatus(&bp, call->reply2);
1515 call->offset = 0;
1516 call->unmarshall++;
1517
1518 /* extract the volume name length */
1519 case 2:
1520 ret = afs_extract_data(call, skb, last, &call->tmp, 4);
1521 switch (ret) {
1522 case 0: break;
1523 case -EAGAIN: return 0;
1524 default: return ret;
1525 }
1526
1527 call->count = ntohl(call->tmp);
1528 _debug("volname length: %u", call->count);
1529 if (call->count >= AFSNAMEMAX)
1530 return -EBADMSG;
1531 call->offset = 0;
1532 call->unmarshall++;
1533
1534 /* extract the volume name */
1535 case 3:
1536 _debug("extract volname");
1537 if (call->count > 0) {
1538 ret = afs_extract_data(call, skb, last, call->reply3,
1539 call->count);
1540 switch (ret) {
1541 case 0: break;
1542 case -EAGAIN: return 0;
1543 default: return ret;
1544 }
1545 }
1546
1547 p = call->reply3;
1548 p[call->count] = 0;
1549 _debug("volname '%s'", p);
1550
1551 call->offset = 0;
1552 call->unmarshall++;
1553
1554 /* extract the volume name padding */
1555 if ((call->count & 3) == 0) {
1556 call->unmarshall++;
1557 goto no_volname_padding;
1558 }
1559 call->count = 4 - (call->count & 3);
1560
1561 case 4:
1562 ret = afs_extract_data(call, skb, last, call->buffer,
1563 call->count);
1564 switch (ret) {
1565 case 0: break;
1566 case -EAGAIN: return 0;
1567 default: return ret;
1568 }
1569
1570 call->offset = 0;
1571 call->unmarshall++;
1572 no_volname_padding:
1573
1574 /* extract the offline message length */
1575 case 5:
1576 ret = afs_extract_data(call, skb, last, &call->tmp, 4);
1577 switch (ret) {
1578 case 0: break;
1579 case -EAGAIN: return 0;
1580 default: return ret;
1581 }
1582
1583 call->count = ntohl(call->tmp);
1584 _debug("offline msg length: %u", call->count);
1585 if (call->count >= AFSNAMEMAX)
1586 return -EBADMSG;
1587 call->offset = 0;
1588 call->unmarshall++;
1589
1590 /* extract the offline message */
1591 case 6:
1592 _debug("extract offline");
1593 if (call->count > 0) {
1594 ret = afs_extract_data(call, skb, last, call->reply3,
1595 call->count);
1596 switch (ret) {
1597 case 0: break;
1598 case -EAGAIN: return 0;
1599 default: return ret;
1600 }
1601 }
1602
1603 p = call->reply3;
1604 p[call->count] = 0;
1605 _debug("offline '%s'", p);
1606
1607 call->offset = 0;
1608 call->unmarshall++;
1609
1610 /* extract the offline message padding */
1611 if ((call->count & 3) == 0) {
1612 call->unmarshall++;
1613 goto no_offline_padding;
1614 }
1615 call->count = 4 - (call->count & 3);
1616
1617 case 7:
1618 ret = afs_extract_data(call, skb, last, call->buffer,
1619 call->count);
1620 switch (ret) {
1621 case 0: break;
1622 case -EAGAIN: return 0;
1623 default: return ret;
1624 }
1625
1626 call->offset = 0;
1627 call->unmarshall++;
1628 no_offline_padding:
1629
1630 /* extract the message of the day length */
1631 case 8:
1632 ret = afs_extract_data(call, skb, last, &call->tmp, 4);
1633 switch (ret) {
1634 case 0: break;
1635 case -EAGAIN: return 0;
1636 default: return ret;
1637 }
1638
1639 call->count = ntohl(call->tmp);
1640 _debug("motd length: %u", call->count);
1641 if (call->count >= AFSNAMEMAX)
1642 return -EBADMSG;
1643 call->offset = 0;
1644 call->unmarshall++;
1645
1646 /* extract the message of the day */
1647 case 9:
1648 _debug("extract motd");
1649 if (call->count > 0) {
1650 ret = afs_extract_data(call, skb, last, call->reply3,
1651 call->count);
1652 switch (ret) {
1653 case 0: break;
1654 case -EAGAIN: return 0;
1655 default: return ret;
1656 }
1657 }
1658
1659 p = call->reply3;
1660 p[call->count] = 0;
1661 _debug("motd '%s'", p);
1662
1663 call->offset = 0;
1664 call->unmarshall++;
1665
1666 /* extract the message of the day padding */
1667 if ((call->count & 3) == 0) {
1668 call->unmarshall++;
1669 goto no_motd_padding;
1670 }
1671 call->count = 4 - (call->count & 3);
1672
1673 case 10:
1674 ret = afs_extract_data(call, skb, last, call->buffer,
1675 call->count);
1676 switch (ret) {
1677 case 0: break;
1678 case -EAGAIN: return 0;
1679 default: return ret;
1680 }
1681
1682 call->offset = 0;
1683 call->unmarshall++;
1684 no_motd_padding:
1685
1686 case 11:
1687 _debug("trailer %d", skb->len);
1688 if (skb->len != 0)
1689 return -EBADMSG;
1690 break;
1691 }
1692
1693 if (!last)
1694 return 0;
1695
1696 _leave(" = 0 [done]");
1697 return 0;
1698}
1699
1700/*
1701 * destroy an FS.GetVolumeStatus call
1702 */
1703static void afs_get_volume_status_call_destructor(struct afs_call *call)
1704{
1705 kfree(call->reply3);
1706 call->reply3 = NULL;
1707 afs_flat_call_destructor(call);
1708}
1709
1710/*
1711 * FS.GetVolumeStatus operation type
1712 */
1713static const struct afs_call_type afs_RXFSGetVolumeStatus = {
1714 .name = "FS.GetVolumeStatus",
1715 .deliver = afs_deliver_fs_get_volume_status,
1716 .abort_to_error = afs_abort_to_error,
1717 .destructor = afs_get_volume_status_call_destructor,
1718};
1719
1720/*
1721 * fetch the status of a volume
1722 */
1723int afs_fs_get_volume_status(struct afs_server *server,
1724 struct key *key,
1725 struct afs_vnode *vnode,
1726 struct afs_volume_status *vs,
1727 const struct afs_wait_mode *wait_mode)
1728{
1729 struct afs_call *call;
1730 __be32 *bp;
1731 void *tmpbuf;
1732
1733 _enter("");
1734
1735 tmpbuf = kmalloc(AFSOPAQUEMAX, GFP_KERNEL);
1736 if (!tmpbuf)
1737 return -ENOMEM;
1738
1739 call = afs_alloc_flat_call(&afs_RXFSGetVolumeStatus, 2 * 4, 12 * 4);
1740 if (!call) {
1741 kfree(tmpbuf);
1742 return -ENOMEM;
1743 }
1744
1745 call->key = key;
1746 call->reply = vnode;
1747 call->reply2 = vs;
1748 call->reply3 = tmpbuf;
1749 call->service_id = FS_SERVICE;
1750 call->port = htons(AFS_FS_PORT);
1751
1752 /* marshall the parameters */
1753 bp = call->request;
1754 bp[0] = htonl(FSGETVOLUMESTATUS);
1755 bp[1] = htonl(vnode->fid.vid);
1756
1757 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1758}
1759
1760/*
1761 * deliver reply data to an FS.SetLock, FS.ExtendLock or FS.ReleaseLock
1762 */
1763static int afs_deliver_fs_xxxx_lock(struct afs_call *call,
1764 struct sk_buff *skb, bool last)
1765{
1766 const __be32 *bp;
1767
1768 _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
1769
1770 afs_transfer_reply(call, skb);
1771 if (!last)
1772 return 0;
1773
1774 if (call->reply_size != call->reply_max)
1775 return -EBADMSG;
1776
1777 /* unmarshall the reply once we've received all of it */
1778 bp = call->buffer;
1779 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
1780
1781 _leave(" = 0 [done]");
1782 return 0;
1783}
1784
1785/*
1786 * FS.SetLock operation type
1787 */
1788static const struct afs_call_type afs_RXFSSetLock = {
1789 .name = "FS.SetLock",
1790 .deliver = afs_deliver_fs_xxxx_lock,
1791 .abort_to_error = afs_abort_to_error,
1792 .destructor = afs_flat_call_destructor,
1793};
1794
1795/*
1796 * FS.ExtendLock operation type
1797 */
1798static const struct afs_call_type afs_RXFSExtendLock = {
1799 .name = "FS.ExtendLock",
1800 .deliver = afs_deliver_fs_xxxx_lock,
1801 .abort_to_error = afs_abort_to_error,
1802 .destructor = afs_flat_call_destructor,
1803};
1804
1805/*
1806 * FS.ReleaseLock operation type
1807 */
1808static const struct afs_call_type afs_RXFSReleaseLock = {
1809 .name = "FS.ReleaseLock",
1810 .deliver = afs_deliver_fs_xxxx_lock,
1811 .abort_to_error = afs_abort_to_error,
1812 .destructor = afs_flat_call_destructor,
1813};
1814
1815/*
1816 * get a lock on a file
1817 */
1818int afs_fs_set_lock(struct afs_server *server,
1819 struct key *key,
1820 struct afs_vnode *vnode,
1821 afs_lock_type_t type,
1822 const struct afs_wait_mode *wait_mode)
1823{
1824 struct afs_call *call;
1825 __be32 *bp;
1826
1827 _enter("");
1828
1829 call = afs_alloc_flat_call(&afs_RXFSSetLock, 5 * 4, 6 * 4);
1830 if (!call)
1831 return -ENOMEM;
1832
1833 call->key = key;
1834 call->reply = vnode;
1835 call->service_id = FS_SERVICE;
1836 call->port = htons(AFS_FS_PORT);
1837
1838 /* marshall the parameters */
1839 bp = call->request;
1840 *bp++ = htonl(FSSETLOCK);
1841 *bp++ = htonl(vnode->fid.vid);
1842 *bp++ = htonl(vnode->fid.vnode);
1843 *bp++ = htonl(vnode->fid.unique);
1844 *bp++ = htonl(type);
1845
1846 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1847}
1848
1849/*
1850 * extend a lock on a file
1851 */
1852int afs_fs_extend_lock(struct afs_server *server,
1853 struct key *key,
1854 struct afs_vnode *vnode,
1855 const struct afs_wait_mode *wait_mode)
1856{
1857 struct afs_call *call;
1858 __be32 *bp;
1859
1860 _enter("");
1861
1862 call = afs_alloc_flat_call(&afs_RXFSExtendLock, 4 * 4, 6 * 4);
1863 if (!call)
1864 return -ENOMEM;
1865
1866 call->key = key;
1867 call->reply = vnode;
1868 call->service_id = FS_SERVICE;
1869 call->port = htons(AFS_FS_PORT);
1870
1871 /* marshall the parameters */
1872 bp = call->request;
1873 *bp++ = htonl(FSEXTENDLOCK);
1874 *bp++ = htonl(vnode->fid.vid);
1875 *bp++ = htonl(vnode->fid.vnode);
1876 *bp++ = htonl(vnode->fid.unique);
1877
1878 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1879}
1880
1881/*
1882 * release a lock on a file
1883 */
1884int afs_fs_release_lock(struct afs_server *server,
1885 struct key *key,
1886 struct afs_vnode *vnode,
1887 const struct afs_wait_mode *wait_mode)
1888{
1889 struct afs_call *call;
1890 __be32 *bp;
1891
1892 _enter("");
1893
1894 call = afs_alloc_flat_call(&afs_RXFSReleaseLock, 4 * 4, 6 * 4);
1895 if (!call)
1896 return -ENOMEM;
1897
1898 call->key = key;
1899 call->reply = vnode;
1900 call->service_id = FS_SERVICE;
1901 call->port = htons(AFS_FS_PORT);
1902
1903 /* marshall the parameters */
1904 bp = call->request;
1905 *bp++ = htonl(FSRELEASELOCK);
1906 *bp++ = htonl(vnode->fid.vid);
1907 *bp++ = htonl(vnode->fid.vnode);
1908 *bp++ = htonl(vnode->fid.unique);
1909
1910 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1911}