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1/* AFS File Server client stubs
2 *
3 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12#include <linux/init.h>
13#include <linux/slab.h>
14#include <linux/sched.h>
15#include <linux/circ_buf.h>
16#include "internal.h"
17#include "afs_fs.h"
18
19/*
20 * decode an AFSFid block
21 */
22static void xdr_decode_AFSFid(const __be32 **_bp, struct afs_fid *fid)
23{
24 const __be32 *bp = *_bp;
25
26 fid->vid = ntohl(*bp++);
27 fid->vnode = ntohl(*bp++);
28 fid->unique = ntohl(*bp++);
29 *_bp = bp;
30}
31
32/*
33 * decode an AFSFetchStatus block
34 */
35static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
36 struct afs_file_status *status,
37 struct afs_vnode *vnode,
38 afs_dataversion_t *store_version)
39{
40 afs_dataversion_t expected_version;
41 const __be32 *bp = *_bp;
42 umode_t mode;
43 u64 data_version, size;
44 u32 changed = 0; /* becomes non-zero if ctime-type changes seen */
45 kuid_t owner;
46 kgid_t group;
47
48#define EXTRACT(DST) \
49 do { \
50 u32 x = ntohl(*bp++); \
51 changed |= DST - x; \
52 DST = x; \
53 } while (0)
54
55 status->if_version = ntohl(*bp++);
56 EXTRACT(status->type);
57 EXTRACT(status->nlink);
58 size = ntohl(*bp++);
59 data_version = ntohl(*bp++);
60 EXTRACT(status->author);
61 owner = make_kuid(&init_user_ns, ntohl(*bp++));
62 changed |= !uid_eq(owner, status->owner);
63 status->owner = owner;
64 EXTRACT(status->caller_access); /* call ticket dependent */
65 EXTRACT(status->anon_access);
66 EXTRACT(status->mode);
67 EXTRACT(status->parent.vnode);
68 EXTRACT(status->parent.unique);
69 bp++; /* seg size */
70 status->mtime_client = ntohl(*bp++);
71 status->mtime_server = ntohl(*bp++);
72 group = make_kgid(&init_user_ns, ntohl(*bp++));
73 changed |= !gid_eq(group, status->group);
74 status->group = group;
75 bp++; /* sync counter */
76 data_version |= (u64) ntohl(*bp++) << 32;
77 EXTRACT(status->lock_count);
78 size |= (u64) ntohl(*bp++) << 32;
79 bp++; /* spare 4 */
80 *_bp = bp;
81
82 if (size != status->size) {
83 status->size = size;
84 changed |= true;
85 }
86 status->mode &= S_IALLUGO;
87
88 _debug("vnode time %lx, %lx",
89 status->mtime_client, status->mtime_server);
90
91 if (vnode) {
92 status->parent.vid = vnode->fid.vid;
93 if (changed && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
94 _debug("vnode changed");
95 i_size_write(&vnode->vfs_inode, size);
96 vnode->vfs_inode.i_uid = status->owner;
97 vnode->vfs_inode.i_gid = status->group;
98 vnode->vfs_inode.i_generation = vnode->fid.unique;
99 set_nlink(&vnode->vfs_inode, status->nlink);
100
101 mode = vnode->vfs_inode.i_mode;
102 mode &= ~S_IALLUGO;
103 mode |= status->mode;
104 barrier();
105 vnode->vfs_inode.i_mode = mode;
106 }
107
108 vnode->vfs_inode.i_ctime.tv_sec = status->mtime_server;
109 vnode->vfs_inode.i_mtime = vnode->vfs_inode.i_ctime;
110 vnode->vfs_inode.i_atime = vnode->vfs_inode.i_ctime;
111 vnode->vfs_inode.i_version = data_version;
112 }
113
114 expected_version = status->data_version;
115 if (store_version)
116 expected_version = *store_version;
117
118 if (expected_version != data_version) {
119 status->data_version = data_version;
120 if (vnode && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
121 _debug("vnode modified %llx on {%x:%u}",
122 (unsigned long long) data_version,
123 vnode->fid.vid, vnode->fid.vnode);
124 set_bit(AFS_VNODE_MODIFIED, &vnode->flags);
125 set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags);
126 }
127 } else if (store_version) {
128 status->data_version = data_version;
129 }
130}
131
132/*
133 * decode an AFSCallBack block
134 */
135static void xdr_decode_AFSCallBack(const __be32 **_bp, struct afs_vnode *vnode)
136{
137 const __be32 *bp = *_bp;
138
139 vnode->cb_version = ntohl(*bp++);
140 vnode->cb_expiry = ntohl(*bp++);
141 vnode->cb_type = ntohl(*bp++);
142 vnode->cb_expires = vnode->cb_expiry + get_seconds();
143 *_bp = bp;
144}
145
146static void xdr_decode_AFSCallBack_raw(const __be32 **_bp,
147 struct afs_callback *cb)
148{
149 const __be32 *bp = *_bp;
150
151 cb->version = ntohl(*bp++);
152 cb->expiry = ntohl(*bp++);
153 cb->type = ntohl(*bp++);
154 *_bp = bp;
155}
156
157/*
158 * decode an AFSVolSync block
159 */
160static void xdr_decode_AFSVolSync(const __be32 **_bp,
161 struct afs_volsync *volsync)
162{
163 const __be32 *bp = *_bp;
164
165 volsync->creation = ntohl(*bp++);
166 bp++; /* spare2 */
167 bp++; /* spare3 */
168 bp++; /* spare4 */
169 bp++; /* spare5 */
170 bp++; /* spare6 */
171 *_bp = bp;
172}
173
174/*
175 * encode the requested attributes into an AFSStoreStatus block
176 */
177static void xdr_encode_AFS_StoreStatus(__be32 **_bp, struct iattr *attr)
178{
179 __be32 *bp = *_bp;
180 u32 mask = 0, mtime = 0, owner = 0, group = 0, mode = 0;
181
182 mask = 0;
183 if (attr->ia_valid & ATTR_MTIME) {
184 mask |= AFS_SET_MTIME;
185 mtime = attr->ia_mtime.tv_sec;
186 }
187
188 if (attr->ia_valid & ATTR_UID) {
189 mask |= AFS_SET_OWNER;
190 owner = from_kuid(&init_user_ns, attr->ia_uid);
191 }
192
193 if (attr->ia_valid & ATTR_GID) {
194 mask |= AFS_SET_GROUP;
195 group = from_kgid(&init_user_ns, attr->ia_gid);
196 }
197
198 if (attr->ia_valid & ATTR_MODE) {
199 mask |= AFS_SET_MODE;
200 mode = attr->ia_mode & S_IALLUGO;
201 }
202
203 *bp++ = htonl(mask);
204 *bp++ = htonl(mtime);
205 *bp++ = htonl(owner);
206 *bp++ = htonl(group);
207 *bp++ = htonl(mode);
208 *bp++ = 0; /* segment size */
209 *_bp = bp;
210}
211
212/*
213 * decode an AFSFetchVolumeStatus block
214 */
215static void xdr_decode_AFSFetchVolumeStatus(const __be32 **_bp,
216 struct afs_volume_status *vs)
217{
218 const __be32 *bp = *_bp;
219
220 vs->vid = ntohl(*bp++);
221 vs->parent_id = ntohl(*bp++);
222 vs->online = ntohl(*bp++);
223 vs->in_service = ntohl(*bp++);
224 vs->blessed = ntohl(*bp++);
225 vs->needs_salvage = ntohl(*bp++);
226 vs->type = ntohl(*bp++);
227 vs->min_quota = ntohl(*bp++);
228 vs->max_quota = ntohl(*bp++);
229 vs->blocks_in_use = ntohl(*bp++);
230 vs->part_blocks_avail = ntohl(*bp++);
231 vs->part_max_blocks = ntohl(*bp++);
232 *_bp = bp;
233}
234
235/*
236 * deliver reply data to an FS.FetchStatus
237 */
238static int afs_deliver_fs_fetch_status(struct afs_call *call)
239{
240 struct afs_vnode *vnode = call->reply;
241 const __be32 *bp;
242 int ret;
243
244 _enter("");
245
246 ret = afs_transfer_reply(call);
247 if (ret < 0)
248 return ret;
249
250 /* unmarshall the reply once we've received all of it */
251 bp = call->buffer;
252 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
253 xdr_decode_AFSCallBack(&bp, vnode);
254 if (call->reply2)
255 xdr_decode_AFSVolSync(&bp, call->reply2);
256
257 _leave(" = 0 [done]");
258 return 0;
259}
260
261/*
262 * FS.FetchStatus operation type
263 */
264static const struct afs_call_type afs_RXFSFetchStatus = {
265 .name = "FS.FetchStatus",
266 .deliver = afs_deliver_fs_fetch_status,
267 .abort_to_error = afs_abort_to_error,
268 .destructor = afs_flat_call_destructor,
269};
270
271/*
272 * fetch the status information for a file
273 */
274int afs_fs_fetch_file_status(struct afs_server *server,
275 struct key *key,
276 struct afs_vnode *vnode,
277 struct afs_volsync *volsync,
278 const struct afs_wait_mode *wait_mode)
279{
280 struct afs_call *call;
281 __be32 *bp;
282
283 _enter(",%x,{%x:%u},,",
284 key_serial(key), vnode->fid.vid, vnode->fid.vnode);
285
286 call = afs_alloc_flat_call(&afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4);
287 if (!call)
288 return -ENOMEM;
289
290 call->key = key;
291 call->reply = vnode;
292 call->reply2 = volsync;
293 call->service_id = FS_SERVICE;
294 call->port = htons(AFS_FS_PORT);
295
296 /* marshall the parameters */
297 bp = call->request;
298 bp[0] = htonl(FSFETCHSTATUS);
299 bp[1] = htonl(vnode->fid.vid);
300 bp[2] = htonl(vnode->fid.vnode);
301 bp[3] = htonl(vnode->fid.unique);
302
303 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
304}
305
306/*
307 * deliver reply data to an FS.FetchData
308 */
309static int afs_deliver_fs_fetch_data(struct afs_call *call)
310{
311 struct afs_vnode *vnode = call->reply;
312 const __be32 *bp;
313 struct page *page;
314 void *buffer;
315 int ret;
316
317 _enter("{%u}", call->unmarshall);
318
319 switch (call->unmarshall) {
320 case 0:
321 call->offset = 0;
322 call->unmarshall++;
323 if (call->operation_ID != FSFETCHDATA64) {
324 call->unmarshall++;
325 goto no_msw;
326 }
327
328 /* extract the upper part of the returned data length of an
329 * FSFETCHDATA64 op (which should always be 0 using this
330 * client) */
331 case 1:
332 _debug("extract data length (MSW)");
333 ret = afs_extract_data(call, &call->tmp, 4, true);
334 if (ret < 0)
335 return ret;
336
337 call->count = ntohl(call->tmp);
338 _debug("DATA length MSW: %u", call->count);
339 if (call->count > 0)
340 return -EBADMSG;
341 call->offset = 0;
342 call->unmarshall++;
343
344 no_msw:
345 /* extract the returned data length */
346 case 2:
347 _debug("extract data length");
348 ret = afs_extract_data(call, &call->tmp, 4, true);
349 if (ret < 0)
350 return ret;
351
352 call->count = ntohl(call->tmp);
353 _debug("DATA length: %u", call->count);
354 if (call->count > PAGE_SIZE)
355 return -EBADMSG;
356 call->offset = 0;
357 call->unmarshall++;
358
359 /* extract the returned data */
360 case 3:
361 _debug("extract data");
362 if (call->count > 0) {
363 page = call->reply3;
364 buffer = kmap(page);
365 ret = afs_extract_data(call, buffer,
366 call->count, true);
367 kunmap(page);
368 if (ret < 0)
369 return ret;
370 }
371
372 call->offset = 0;
373 call->unmarshall++;
374
375 /* extract the metadata */
376 case 4:
377 ret = afs_extract_data(call, call->buffer,
378 (21 + 3 + 6) * 4, false);
379 if (ret < 0)
380 return ret;
381
382 bp = call->buffer;
383 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
384 xdr_decode_AFSCallBack(&bp, vnode);
385 if (call->reply2)
386 xdr_decode_AFSVolSync(&bp, call->reply2);
387
388 call->offset = 0;
389 call->unmarshall++;
390
391 case 5:
392 break;
393 }
394
395 if (call->count < PAGE_SIZE) {
396 _debug("clear");
397 page = call->reply3;
398 buffer = kmap(page);
399 memset(buffer + call->count, 0, PAGE_SIZE - call->count);
400 kunmap(page);
401 }
402
403 _leave(" = 0 [done]");
404 return 0;
405}
406
407/*
408 * FS.FetchData operation type
409 */
410static const struct afs_call_type afs_RXFSFetchData = {
411 .name = "FS.FetchData",
412 .deliver = afs_deliver_fs_fetch_data,
413 .abort_to_error = afs_abort_to_error,
414 .destructor = afs_flat_call_destructor,
415};
416
417static const struct afs_call_type afs_RXFSFetchData64 = {
418 .name = "FS.FetchData64",
419 .deliver = afs_deliver_fs_fetch_data,
420 .abort_to_error = afs_abort_to_error,
421 .destructor = afs_flat_call_destructor,
422};
423
424/*
425 * fetch data from a very large file
426 */
427static int afs_fs_fetch_data64(struct afs_server *server,
428 struct key *key,
429 struct afs_vnode *vnode,
430 off_t offset, size_t length,
431 struct page *buffer,
432 const struct afs_wait_mode *wait_mode)
433{
434 struct afs_call *call;
435 __be32 *bp;
436
437 _enter("");
438
439 ASSERTCMP(length, <, ULONG_MAX);
440
441 call = afs_alloc_flat_call(&afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4);
442 if (!call)
443 return -ENOMEM;
444
445 call->key = key;
446 call->reply = vnode;
447 call->reply2 = NULL; /* volsync */
448 call->reply3 = buffer;
449 call->service_id = FS_SERVICE;
450 call->port = htons(AFS_FS_PORT);
451 call->operation_ID = FSFETCHDATA64;
452
453 /* marshall the parameters */
454 bp = call->request;
455 bp[0] = htonl(FSFETCHDATA64);
456 bp[1] = htonl(vnode->fid.vid);
457 bp[2] = htonl(vnode->fid.vnode);
458 bp[3] = htonl(vnode->fid.unique);
459 bp[4] = htonl(upper_32_bits(offset));
460 bp[5] = htonl((u32) offset);
461 bp[6] = 0;
462 bp[7] = htonl((u32) length);
463
464 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
465}
466
467/*
468 * fetch data from a file
469 */
470int afs_fs_fetch_data(struct afs_server *server,
471 struct key *key,
472 struct afs_vnode *vnode,
473 off_t offset, size_t length,
474 struct page *buffer,
475 const struct afs_wait_mode *wait_mode)
476{
477 struct afs_call *call;
478 __be32 *bp;
479
480 if (upper_32_bits(offset) || upper_32_bits(offset + length))
481 return afs_fs_fetch_data64(server, key, vnode, offset, length,
482 buffer, wait_mode);
483
484 _enter("");
485
486 call = afs_alloc_flat_call(&afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
487 if (!call)
488 return -ENOMEM;
489
490 call->key = key;
491 call->reply = vnode;
492 call->reply2 = NULL; /* volsync */
493 call->reply3 = buffer;
494 call->service_id = FS_SERVICE;
495 call->port = htons(AFS_FS_PORT);
496 call->operation_ID = FSFETCHDATA;
497
498 /* marshall the parameters */
499 bp = call->request;
500 bp[0] = htonl(FSFETCHDATA);
501 bp[1] = htonl(vnode->fid.vid);
502 bp[2] = htonl(vnode->fid.vnode);
503 bp[3] = htonl(vnode->fid.unique);
504 bp[4] = htonl(offset);
505 bp[5] = htonl(length);
506
507 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
508}
509
510/*
511 * deliver reply data to an FS.GiveUpCallBacks
512 */
513static int afs_deliver_fs_give_up_callbacks(struct afs_call *call)
514{
515 _enter("");
516
517 /* shouldn't be any reply data */
518 return afs_extract_data(call, NULL, 0, false);
519}
520
521/*
522 * FS.GiveUpCallBacks operation type
523 */
524static const struct afs_call_type afs_RXFSGiveUpCallBacks = {
525 .name = "FS.GiveUpCallBacks",
526 .deliver = afs_deliver_fs_give_up_callbacks,
527 .abort_to_error = afs_abort_to_error,
528 .destructor = afs_flat_call_destructor,
529};
530
531/*
532 * give up a set of callbacks
533 * - the callbacks are held in the server->cb_break ring
534 */
535int afs_fs_give_up_callbacks(struct afs_server *server,
536 const struct afs_wait_mode *wait_mode)
537{
538 struct afs_call *call;
539 size_t ncallbacks;
540 __be32 *bp, *tp;
541 int loop;
542
543 ncallbacks = CIRC_CNT(server->cb_break_head, server->cb_break_tail,
544 ARRAY_SIZE(server->cb_break));
545
546 _enter("{%zu},", ncallbacks);
547
548 if (ncallbacks == 0)
549 return 0;
550 if (ncallbacks > AFSCBMAX)
551 ncallbacks = AFSCBMAX;
552
553 _debug("break %zu callbacks", ncallbacks);
554
555 call = afs_alloc_flat_call(&afs_RXFSGiveUpCallBacks,
556 12 + ncallbacks * 6 * 4, 0);
557 if (!call)
558 return -ENOMEM;
559
560 call->service_id = FS_SERVICE;
561 call->port = htons(AFS_FS_PORT);
562
563 /* marshall the parameters */
564 bp = call->request;
565 tp = bp + 2 + ncallbacks * 3;
566 *bp++ = htonl(FSGIVEUPCALLBACKS);
567 *bp++ = htonl(ncallbacks);
568 *tp++ = htonl(ncallbacks);
569
570 atomic_sub(ncallbacks, &server->cb_break_n);
571 for (loop = ncallbacks; loop > 0; loop--) {
572 struct afs_callback *cb =
573 &server->cb_break[server->cb_break_tail];
574
575 *bp++ = htonl(cb->fid.vid);
576 *bp++ = htonl(cb->fid.vnode);
577 *bp++ = htonl(cb->fid.unique);
578 *tp++ = htonl(cb->version);
579 *tp++ = htonl(cb->expiry);
580 *tp++ = htonl(cb->type);
581 smp_mb();
582 server->cb_break_tail =
583 (server->cb_break_tail + 1) &
584 (ARRAY_SIZE(server->cb_break) - 1);
585 }
586
587 ASSERT(ncallbacks > 0);
588 wake_up_nr(&server->cb_break_waitq, ncallbacks);
589
590 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
591}
592
593/*
594 * deliver reply data to an FS.CreateFile or an FS.MakeDir
595 */
596static int afs_deliver_fs_create_vnode(struct afs_call *call)
597{
598 struct afs_vnode *vnode = call->reply;
599 const __be32 *bp;
600 int ret;
601
602 _enter("{%u}", call->unmarshall);
603
604 ret = afs_transfer_reply(call);
605 if (ret < 0)
606 return ret;
607
608 /* unmarshall the reply once we've received all of it */
609 bp = call->buffer;
610 xdr_decode_AFSFid(&bp, call->reply2);
611 xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL, NULL);
612 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
613 xdr_decode_AFSCallBack_raw(&bp, call->reply4);
614 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
615
616 _leave(" = 0 [done]");
617 return 0;
618}
619
620/*
621 * FS.CreateFile and FS.MakeDir operation type
622 */
623static const struct afs_call_type afs_RXFSCreateXXXX = {
624 .name = "FS.CreateXXXX",
625 .deliver = afs_deliver_fs_create_vnode,
626 .abort_to_error = afs_abort_to_error,
627 .destructor = afs_flat_call_destructor,
628};
629
630/*
631 * create a file or make a directory
632 */
633int afs_fs_create(struct afs_server *server,
634 struct key *key,
635 struct afs_vnode *vnode,
636 const char *name,
637 umode_t mode,
638 struct afs_fid *newfid,
639 struct afs_file_status *newstatus,
640 struct afs_callback *newcb,
641 const struct afs_wait_mode *wait_mode)
642{
643 struct afs_call *call;
644 size_t namesz, reqsz, padsz;
645 __be32 *bp;
646
647 _enter("");
648
649 namesz = strlen(name);
650 padsz = (4 - (namesz & 3)) & 3;
651 reqsz = (5 * 4) + namesz + padsz + (6 * 4);
652
653 call = afs_alloc_flat_call(&afs_RXFSCreateXXXX, reqsz,
654 (3 + 21 + 21 + 3 + 6) * 4);
655 if (!call)
656 return -ENOMEM;
657
658 call->key = key;
659 call->reply = vnode;
660 call->reply2 = newfid;
661 call->reply3 = newstatus;
662 call->reply4 = newcb;
663 call->service_id = FS_SERVICE;
664 call->port = htons(AFS_FS_PORT);
665
666 /* marshall the parameters */
667 bp = call->request;
668 *bp++ = htonl(S_ISDIR(mode) ? FSMAKEDIR : FSCREATEFILE);
669 *bp++ = htonl(vnode->fid.vid);
670 *bp++ = htonl(vnode->fid.vnode);
671 *bp++ = htonl(vnode->fid.unique);
672 *bp++ = htonl(namesz);
673 memcpy(bp, name, namesz);
674 bp = (void *) bp + namesz;
675 if (padsz > 0) {
676 memset(bp, 0, padsz);
677 bp = (void *) bp + padsz;
678 }
679 *bp++ = htonl(AFS_SET_MODE);
680 *bp++ = 0; /* mtime */
681 *bp++ = 0; /* owner */
682 *bp++ = 0; /* group */
683 *bp++ = htonl(mode & S_IALLUGO); /* unix mode */
684 *bp++ = 0; /* segment size */
685
686 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
687}
688
689/*
690 * deliver reply data to an FS.RemoveFile or FS.RemoveDir
691 */
692static int afs_deliver_fs_remove(struct afs_call *call)
693{
694 struct afs_vnode *vnode = call->reply;
695 const __be32 *bp;
696 int ret;
697
698 _enter("{%u}", call->unmarshall);
699
700 ret = afs_transfer_reply(call);
701 if (ret < 0)
702 return ret;
703
704 /* unmarshall the reply once we've received all of it */
705 bp = call->buffer;
706 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
707 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
708
709 _leave(" = 0 [done]");
710 return 0;
711}
712
713/*
714 * FS.RemoveDir/FS.RemoveFile operation type
715 */
716static const struct afs_call_type afs_RXFSRemoveXXXX = {
717 .name = "FS.RemoveXXXX",
718 .deliver = afs_deliver_fs_remove,
719 .abort_to_error = afs_abort_to_error,
720 .destructor = afs_flat_call_destructor,
721};
722
723/*
724 * remove a file or directory
725 */
726int afs_fs_remove(struct afs_server *server,
727 struct key *key,
728 struct afs_vnode *vnode,
729 const char *name,
730 bool isdir,
731 const struct afs_wait_mode *wait_mode)
732{
733 struct afs_call *call;
734 size_t namesz, reqsz, padsz;
735 __be32 *bp;
736
737 _enter("");
738
739 namesz = strlen(name);
740 padsz = (4 - (namesz & 3)) & 3;
741 reqsz = (5 * 4) + namesz + padsz;
742
743 call = afs_alloc_flat_call(&afs_RXFSRemoveXXXX, reqsz, (21 + 6) * 4);
744 if (!call)
745 return -ENOMEM;
746
747 call->key = key;
748 call->reply = vnode;
749 call->service_id = FS_SERVICE;
750 call->port = htons(AFS_FS_PORT);
751
752 /* marshall the parameters */
753 bp = call->request;
754 *bp++ = htonl(isdir ? FSREMOVEDIR : FSREMOVEFILE);
755 *bp++ = htonl(vnode->fid.vid);
756 *bp++ = htonl(vnode->fid.vnode);
757 *bp++ = htonl(vnode->fid.unique);
758 *bp++ = htonl(namesz);
759 memcpy(bp, name, namesz);
760 bp = (void *) bp + namesz;
761 if (padsz > 0) {
762 memset(bp, 0, padsz);
763 bp = (void *) bp + padsz;
764 }
765
766 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
767}
768
769/*
770 * deliver reply data to an FS.Link
771 */
772static int afs_deliver_fs_link(struct afs_call *call)
773{
774 struct afs_vnode *dvnode = call->reply, *vnode = call->reply2;
775 const __be32 *bp;
776 int ret;
777
778 _enter("{%u}", call->unmarshall);
779
780 ret = afs_transfer_reply(call);
781 if (ret < 0)
782 return ret;
783
784 /* unmarshall the reply once we've received all of it */
785 bp = call->buffer;
786 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
787 xdr_decode_AFSFetchStatus(&bp, &dvnode->status, dvnode, NULL);
788 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
789
790 _leave(" = 0 [done]");
791 return 0;
792}
793
794/*
795 * FS.Link operation type
796 */
797static const struct afs_call_type afs_RXFSLink = {
798 .name = "FS.Link",
799 .deliver = afs_deliver_fs_link,
800 .abort_to_error = afs_abort_to_error,
801 .destructor = afs_flat_call_destructor,
802};
803
804/*
805 * make a hard link
806 */
807int afs_fs_link(struct afs_server *server,
808 struct key *key,
809 struct afs_vnode *dvnode,
810 struct afs_vnode *vnode,
811 const char *name,
812 const struct afs_wait_mode *wait_mode)
813{
814 struct afs_call *call;
815 size_t namesz, reqsz, padsz;
816 __be32 *bp;
817
818 _enter("");
819
820 namesz = strlen(name);
821 padsz = (4 - (namesz & 3)) & 3;
822 reqsz = (5 * 4) + namesz + padsz + (3 * 4);
823
824 call = afs_alloc_flat_call(&afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
825 if (!call)
826 return -ENOMEM;
827
828 call->key = key;
829 call->reply = dvnode;
830 call->reply2 = vnode;
831 call->service_id = FS_SERVICE;
832 call->port = htons(AFS_FS_PORT);
833
834 /* marshall the parameters */
835 bp = call->request;
836 *bp++ = htonl(FSLINK);
837 *bp++ = htonl(dvnode->fid.vid);
838 *bp++ = htonl(dvnode->fid.vnode);
839 *bp++ = htonl(dvnode->fid.unique);
840 *bp++ = htonl(namesz);
841 memcpy(bp, name, namesz);
842 bp = (void *) bp + namesz;
843 if (padsz > 0) {
844 memset(bp, 0, padsz);
845 bp = (void *) bp + padsz;
846 }
847 *bp++ = htonl(vnode->fid.vid);
848 *bp++ = htonl(vnode->fid.vnode);
849 *bp++ = htonl(vnode->fid.unique);
850
851 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
852}
853
854/*
855 * deliver reply data to an FS.Symlink
856 */
857static int afs_deliver_fs_symlink(struct afs_call *call)
858{
859 struct afs_vnode *vnode = call->reply;
860 const __be32 *bp;
861 int ret;
862
863 _enter("{%u}", call->unmarshall);
864
865 ret = afs_transfer_reply(call);
866 if (ret < 0)
867 return ret;
868
869 /* unmarshall the reply once we've received all of it */
870 bp = call->buffer;
871 xdr_decode_AFSFid(&bp, call->reply2);
872 xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL, NULL);
873 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
874 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
875
876 _leave(" = 0 [done]");
877 return 0;
878}
879
880/*
881 * FS.Symlink operation type
882 */
883static const struct afs_call_type afs_RXFSSymlink = {
884 .name = "FS.Symlink",
885 .deliver = afs_deliver_fs_symlink,
886 .abort_to_error = afs_abort_to_error,
887 .destructor = afs_flat_call_destructor,
888};
889
890/*
891 * create a symbolic link
892 */
893int afs_fs_symlink(struct afs_server *server,
894 struct key *key,
895 struct afs_vnode *vnode,
896 const char *name,
897 const char *contents,
898 struct afs_fid *newfid,
899 struct afs_file_status *newstatus,
900 const struct afs_wait_mode *wait_mode)
901{
902 struct afs_call *call;
903 size_t namesz, reqsz, padsz, c_namesz, c_padsz;
904 __be32 *bp;
905
906 _enter("");
907
908 namesz = strlen(name);
909 padsz = (4 - (namesz & 3)) & 3;
910
911 c_namesz = strlen(contents);
912 c_padsz = (4 - (c_namesz & 3)) & 3;
913
914 reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4);
915
916 call = afs_alloc_flat_call(&afs_RXFSSymlink, reqsz,
917 (3 + 21 + 21 + 6) * 4);
918 if (!call)
919 return -ENOMEM;
920
921 call->key = key;
922 call->reply = vnode;
923 call->reply2 = newfid;
924 call->reply3 = newstatus;
925 call->service_id = FS_SERVICE;
926 call->port = htons(AFS_FS_PORT);
927
928 /* marshall the parameters */
929 bp = call->request;
930 *bp++ = htonl(FSSYMLINK);
931 *bp++ = htonl(vnode->fid.vid);
932 *bp++ = htonl(vnode->fid.vnode);
933 *bp++ = htonl(vnode->fid.unique);
934 *bp++ = htonl(namesz);
935 memcpy(bp, name, namesz);
936 bp = (void *) bp + namesz;
937 if (padsz > 0) {
938 memset(bp, 0, padsz);
939 bp = (void *) bp + padsz;
940 }
941 *bp++ = htonl(c_namesz);
942 memcpy(bp, contents, c_namesz);
943 bp = (void *) bp + c_namesz;
944 if (c_padsz > 0) {
945 memset(bp, 0, c_padsz);
946 bp = (void *) bp + c_padsz;
947 }
948 *bp++ = htonl(AFS_SET_MODE);
949 *bp++ = 0; /* mtime */
950 *bp++ = 0; /* owner */
951 *bp++ = 0; /* group */
952 *bp++ = htonl(S_IRWXUGO); /* unix mode */
953 *bp++ = 0; /* segment size */
954
955 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
956}
957
958/*
959 * deliver reply data to an FS.Rename
960 */
961static int afs_deliver_fs_rename(struct afs_call *call)
962{
963 struct afs_vnode *orig_dvnode = call->reply, *new_dvnode = call->reply2;
964 const __be32 *bp;
965 int ret;
966
967 _enter("{%u}", call->unmarshall);
968
969 ret = afs_transfer_reply(call);
970 if (ret < 0)
971 return ret;
972
973 /* unmarshall the reply once we've received all of it */
974 bp = call->buffer;
975 xdr_decode_AFSFetchStatus(&bp, &orig_dvnode->status, orig_dvnode, NULL);
976 if (new_dvnode != orig_dvnode)
977 xdr_decode_AFSFetchStatus(&bp, &new_dvnode->status, new_dvnode,
978 NULL);
979 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
980
981 _leave(" = 0 [done]");
982 return 0;
983}
984
985/*
986 * FS.Rename operation type
987 */
988static const struct afs_call_type afs_RXFSRename = {
989 .name = "FS.Rename",
990 .deliver = afs_deliver_fs_rename,
991 .abort_to_error = afs_abort_to_error,
992 .destructor = afs_flat_call_destructor,
993};
994
995/*
996 * create a symbolic link
997 */
998int afs_fs_rename(struct afs_server *server,
999 struct key *key,
1000 struct afs_vnode *orig_dvnode,
1001 const char *orig_name,
1002 struct afs_vnode *new_dvnode,
1003 const char *new_name,
1004 const struct afs_wait_mode *wait_mode)
1005{
1006 struct afs_call *call;
1007 size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz;
1008 __be32 *bp;
1009
1010 _enter("");
1011
1012 o_namesz = strlen(orig_name);
1013 o_padsz = (4 - (o_namesz & 3)) & 3;
1014
1015 n_namesz = strlen(new_name);
1016 n_padsz = (4 - (n_namesz & 3)) & 3;
1017
1018 reqsz = (4 * 4) +
1019 4 + o_namesz + o_padsz +
1020 (3 * 4) +
1021 4 + n_namesz + n_padsz;
1022
1023 call = afs_alloc_flat_call(&afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
1024 if (!call)
1025 return -ENOMEM;
1026
1027 call->key = key;
1028 call->reply = orig_dvnode;
1029 call->reply2 = new_dvnode;
1030 call->service_id = FS_SERVICE;
1031 call->port = htons(AFS_FS_PORT);
1032
1033 /* marshall the parameters */
1034 bp = call->request;
1035 *bp++ = htonl(FSRENAME);
1036 *bp++ = htonl(orig_dvnode->fid.vid);
1037 *bp++ = htonl(orig_dvnode->fid.vnode);
1038 *bp++ = htonl(orig_dvnode->fid.unique);
1039 *bp++ = htonl(o_namesz);
1040 memcpy(bp, orig_name, o_namesz);
1041 bp = (void *) bp + o_namesz;
1042 if (o_padsz > 0) {
1043 memset(bp, 0, o_padsz);
1044 bp = (void *) bp + o_padsz;
1045 }
1046
1047 *bp++ = htonl(new_dvnode->fid.vid);
1048 *bp++ = htonl(new_dvnode->fid.vnode);
1049 *bp++ = htonl(new_dvnode->fid.unique);
1050 *bp++ = htonl(n_namesz);
1051 memcpy(bp, new_name, n_namesz);
1052 bp = (void *) bp + n_namesz;
1053 if (n_padsz > 0) {
1054 memset(bp, 0, n_padsz);
1055 bp = (void *) bp + n_padsz;
1056 }
1057
1058 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1059}
1060
1061/*
1062 * deliver reply data to an FS.StoreData
1063 */
1064static int afs_deliver_fs_store_data(struct afs_call *call)
1065{
1066 struct afs_vnode *vnode = call->reply;
1067 const __be32 *bp;
1068 int ret;
1069
1070 _enter("");
1071
1072 ret = afs_transfer_reply(call);
1073 if (ret < 0)
1074 return ret;
1075
1076 /* unmarshall the reply once we've received all of it */
1077 bp = call->buffer;
1078 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
1079 &call->store_version);
1080 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
1081
1082 afs_pages_written_back(vnode, call);
1083
1084 _leave(" = 0 [done]");
1085 return 0;
1086}
1087
1088/*
1089 * FS.StoreData operation type
1090 */
1091static const struct afs_call_type afs_RXFSStoreData = {
1092 .name = "FS.StoreData",
1093 .deliver = afs_deliver_fs_store_data,
1094 .abort_to_error = afs_abort_to_error,
1095 .destructor = afs_flat_call_destructor,
1096};
1097
1098static const struct afs_call_type afs_RXFSStoreData64 = {
1099 .name = "FS.StoreData64",
1100 .deliver = afs_deliver_fs_store_data,
1101 .abort_to_error = afs_abort_to_error,
1102 .destructor = afs_flat_call_destructor,
1103};
1104
1105/*
1106 * store a set of pages to a very large file
1107 */
1108static int afs_fs_store_data64(struct afs_server *server,
1109 struct afs_writeback *wb,
1110 pgoff_t first, pgoff_t last,
1111 unsigned offset, unsigned to,
1112 loff_t size, loff_t pos, loff_t i_size,
1113 const struct afs_wait_mode *wait_mode)
1114{
1115 struct afs_vnode *vnode = wb->vnode;
1116 struct afs_call *call;
1117 __be32 *bp;
1118
1119 _enter(",%x,{%x:%u},,",
1120 key_serial(wb->key), vnode->fid.vid, vnode->fid.vnode);
1121
1122 call = afs_alloc_flat_call(&afs_RXFSStoreData64,
1123 (4 + 6 + 3 * 2) * 4,
1124 (21 + 6) * 4);
1125 if (!call)
1126 return -ENOMEM;
1127
1128 call->wb = wb;
1129 call->key = wb->key;
1130 call->reply = vnode;
1131 call->service_id = FS_SERVICE;
1132 call->port = htons(AFS_FS_PORT);
1133 call->mapping = vnode->vfs_inode.i_mapping;
1134 call->first = first;
1135 call->last = last;
1136 call->first_offset = offset;
1137 call->last_to = to;
1138 call->send_pages = true;
1139 call->store_version = vnode->status.data_version + 1;
1140
1141 /* marshall the parameters */
1142 bp = call->request;
1143 *bp++ = htonl(FSSTOREDATA64);
1144 *bp++ = htonl(vnode->fid.vid);
1145 *bp++ = htonl(vnode->fid.vnode);
1146 *bp++ = htonl(vnode->fid.unique);
1147
1148 *bp++ = 0; /* mask */
1149 *bp++ = 0; /* mtime */
1150 *bp++ = 0; /* owner */
1151 *bp++ = 0; /* group */
1152 *bp++ = 0; /* unix mode */
1153 *bp++ = 0; /* segment size */
1154
1155 *bp++ = htonl(pos >> 32);
1156 *bp++ = htonl((u32) pos);
1157 *bp++ = htonl(size >> 32);
1158 *bp++ = htonl((u32) size);
1159 *bp++ = htonl(i_size >> 32);
1160 *bp++ = htonl((u32) i_size);
1161
1162 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1163}
1164
1165/*
1166 * store a set of pages
1167 */
1168int afs_fs_store_data(struct afs_server *server, struct afs_writeback *wb,
1169 pgoff_t first, pgoff_t last,
1170 unsigned offset, unsigned to,
1171 const struct afs_wait_mode *wait_mode)
1172{
1173 struct afs_vnode *vnode = wb->vnode;
1174 struct afs_call *call;
1175 loff_t size, pos, i_size;
1176 __be32 *bp;
1177
1178 _enter(",%x,{%x:%u},,",
1179 key_serial(wb->key), vnode->fid.vid, vnode->fid.vnode);
1180
1181 size = to - offset;
1182 if (first != last)
1183 size += (loff_t)(last - first) << PAGE_SHIFT;
1184 pos = (loff_t)first << PAGE_SHIFT;
1185 pos += offset;
1186
1187 i_size = i_size_read(&vnode->vfs_inode);
1188 if (pos + size > i_size)
1189 i_size = size + pos;
1190
1191 _debug("size %llx, at %llx, i_size %llx",
1192 (unsigned long long) size, (unsigned long long) pos,
1193 (unsigned long long) i_size);
1194
1195 if (pos >> 32 || i_size >> 32 || size >> 32 || (pos + size) >> 32)
1196 return afs_fs_store_data64(server, wb, first, last, offset, to,
1197 size, pos, i_size, wait_mode);
1198
1199 call = afs_alloc_flat_call(&afs_RXFSStoreData,
1200 (4 + 6 + 3) * 4,
1201 (21 + 6) * 4);
1202 if (!call)
1203 return -ENOMEM;
1204
1205 call->wb = wb;
1206 call->key = wb->key;
1207 call->reply = vnode;
1208 call->service_id = FS_SERVICE;
1209 call->port = htons(AFS_FS_PORT);
1210 call->mapping = vnode->vfs_inode.i_mapping;
1211 call->first = first;
1212 call->last = last;
1213 call->first_offset = offset;
1214 call->last_to = to;
1215 call->send_pages = true;
1216 call->store_version = vnode->status.data_version + 1;
1217
1218 /* marshall the parameters */
1219 bp = call->request;
1220 *bp++ = htonl(FSSTOREDATA);
1221 *bp++ = htonl(vnode->fid.vid);
1222 *bp++ = htonl(vnode->fid.vnode);
1223 *bp++ = htonl(vnode->fid.unique);
1224
1225 *bp++ = 0; /* mask */
1226 *bp++ = 0; /* mtime */
1227 *bp++ = 0; /* owner */
1228 *bp++ = 0; /* group */
1229 *bp++ = 0; /* unix mode */
1230 *bp++ = 0; /* segment size */
1231
1232 *bp++ = htonl(pos);
1233 *bp++ = htonl(size);
1234 *bp++ = htonl(i_size);
1235
1236 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1237}
1238
1239/*
1240 * deliver reply data to an FS.StoreStatus
1241 */
1242static int afs_deliver_fs_store_status(struct afs_call *call)
1243{
1244 afs_dataversion_t *store_version;
1245 struct afs_vnode *vnode = call->reply;
1246 const __be32 *bp;
1247 int ret;
1248
1249 _enter("");
1250
1251 ret = afs_transfer_reply(call);
1252 if (ret < 0)
1253 return ret;
1254
1255 /* unmarshall the reply once we've received all of it */
1256 store_version = NULL;
1257 if (call->operation_ID == FSSTOREDATA)
1258 store_version = &call->store_version;
1259
1260 bp = call->buffer;
1261 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, store_version);
1262 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
1263
1264 _leave(" = 0 [done]");
1265 return 0;
1266}
1267
1268/*
1269 * FS.StoreStatus operation type
1270 */
1271static const struct afs_call_type afs_RXFSStoreStatus = {
1272 .name = "FS.StoreStatus",
1273 .deliver = afs_deliver_fs_store_status,
1274 .abort_to_error = afs_abort_to_error,
1275 .destructor = afs_flat_call_destructor,
1276};
1277
1278static const struct afs_call_type afs_RXFSStoreData_as_Status = {
1279 .name = "FS.StoreData",
1280 .deliver = afs_deliver_fs_store_status,
1281 .abort_to_error = afs_abort_to_error,
1282 .destructor = afs_flat_call_destructor,
1283};
1284
1285static const struct afs_call_type afs_RXFSStoreData64_as_Status = {
1286 .name = "FS.StoreData64",
1287 .deliver = afs_deliver_fs_store_status,
1288 .abort_to_error = afs_abort_to_error,
1289 .destructor = afs_flat_call_destructor,
1290};
1291
1292/*
1293 * set the attributes on a very large file, using FS.StoreData rather than
1294 * FS.StoreStatus so as to alter the file size also
1295 */
1296static int afs_fs_setattr_size64(struct afs_server *server, struct key *key,
1297 struct afs_vnode *vnode, struct iattr *attr,
1298 const struct afs_wait_mode *wait_mode)
1299{
1300 struct afs_call *call;
1301 __be32 *bp;
1302
1303 _enter(",%x,{%x:%u},,",
1304 key_serial(key), vnode->fid.vid, vnode->fid.vnode);
1305
1306 ASSERT(attr->ia_valid & ATTR_SIZE);
1307
1308 call = afs_alloc_flat_call(&afs_RXFSStoreData64_as_Status,
1309 (4 + 6 + 3 * 2) * 4,
1310 (21 + 6) * 4);
1311 if (!call)
1312 return -ENOMEM;
1313
1314 call->key = key;
1315 call->reply = vnode;
1316 call->service_id = FS_SERVICE;
1317 call->port = htons(AFS_FS_PORT);
1318 call->store_version = vnode->status.data_version + 1;
1319 call->operation_ID = FSSTOREDATA;
1320
1321 /* marshall the parameters */
1322 bp = call->request;
1323 *bp++ = htonl(FSSTOREDATA64);
1324 *bp++ = htonl(vnode->fid.vid);
1325 *bp++ = htonl(vnode->fid.vnode);
1326 *bp++ = htonl(vnode->fid.unique);
1327
1328 xdr_encode_AFS_StoreStatus(&bp, attr);
1329
1330 *bp++ = 0; /* position of start of write */
1331 *bp++ = 0;
1332 *bp++ = 0; /* size of write */
1333 *bp++ = 0;
1334 *bp++ = htonl(attr->ia_size >> 32); /* new file length */
1335 *bp++ = htonl((u32) attr->ia_size);
1336
1337 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1338}
1339
1340/*
1341 * set the attributes on a file, using FS.StoreData rather than FS.StoreStatus
1342 * so as to alter the file size also
1343 */
1344static int afs_fs_setattr_size(struct afs_server *server, struct key *key,
1345 struct afs_vnode *vnode, struct iattr *attr,
1346 const struct afs_wait_mode *wait_mode)
1347{
1348 struct afs_call *call;
1349 __be32 *bp;
1350
1351 _enter(",%x,{%x:%u},,",
1352 key_serial(key), vnode->fid.vid, vnode->fid.vnode);
1353
1354 ASSERT(attr->ia_valid & ATTR_SIZE);
1355 if (attr->ia_size >> 32)
1356 return afs_fs_setattr_size64(server, key, vnode, attr,
1357 wait_mode);
1358
1359 call = afs_alloc_flat_call(&afs_RXFSStoreData_as_Status,
1360 (4 + 6 + 3) * 4,
1361 (21 + 6) * 4);
1362 if (!call)
1363 return -ENOMEM;
1364
1365 call->key = key;
1366 call->reply = vnode;
1367 call->service_id = FS_SERVICE;
1368 call->port = htons(AFS_FS_PORT);
1369 call->store_version = vnode->status.data_version + 1;
1370 call->operation_ID = FSSTOREDATA;
1371
1372 /* marshall the parameters */
1373 bp = call->request;
1374 *bp++ = htonl(FSSTOREDATA);
1375 *bp++ = htonl(vnode->fid.vid);
1376 *bp++ = htonl(vnode->fid.vnode);
1377 *bp++ = htonl(vnode->fid.unique);
1378
1379 xdr_encode_AFS_StoreStatus(&bp, attr);
1380
1381 *bp++ = 0; /* position of start of write */
1382 *bp++ = 0; /* size of write */
1383 *bp++ = htonl(attr->ia_size); /* new file length */
1384
1385 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1386}
1387
1388/*
1389 * set the attributes on a file, using FS.StoreData if there's a change in file
1390 * size, and FS.StoreStatus otherwise
1391 */
1392int afs_fs_setattr(struct afs_server *server, struct key *key,
1393 struct afs_vnode *vnode, struct iattr *attr,
1394 const struct afs_wait_mode *wait_mode)
1395{
1396 struct afs_call *call;
1397 __be32 *bp;
1398
1399 if (attr->ia_valid & ATTR_SIZE)
1400 return afs_fs_setattr_size(server, key, vnode, attr,
1401 wait_mode);
1402
1403 _enter(",%x,{%x:%u},,",
1404 key_serial(key), vnode->fid.vid, vnode->fid.vnode);
1405
1406 call = afs_alloc_flat_call(&afs_RXFSStoreStatus,
1407 (4 + 6) * 4,
1408 (21 + 6) * 4);
1409 if (!call)
1410 return -ENOMEM;
1411
1412 call->key = key;
1413 call->reply = vnode;
1414 call->service_id = FS_SERVICE;
1415 call->port = htons(AFS_FS_PORT);
1416 call->operation_ID = FSSTORESTATUS;
1417
1418 /* marshall the parameters */
1419 bp = call->request;
1420 *bp++ = htonl(FSSTORESTATUS);
1421 *bp++ = htonl(vnode->fid.vid);
1422 *bp++ = htonl(vnode->fid.vnode);
1423 *bp++ = htonl(vnode->fid.unique);
1424
1425 xdr_encode_AFS_StoreStatus(&bp, attr);
1426
1427 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1428}
1429
1430/*
1431 * deliver reply data to an FS.GetVolumeStatus
1432 */
1433static int afs_deliver_fs_get_volume_status(struct afs_call *call)
1434{
1435 const __be32 *bp;
1436 char *p;
1437 int ret;
1438
1439 _enter("{%u}", call->unmarshall);
1440
1441 switch (call->unmarshall) {
1442 case 0:
1443 call->offset = 0;
1444 call->unmarshall++;
1445
1446 /* extract the returned status record */
1447 case 1:
1448 _debug("extract status");
1449 ret = afs_extract_data(call, call->buffer,
1450 12 * 4, true);
1451 if (ret < 0)
1452 return ret;
1453
1454 bp = call->buffer;
1455 xdr_decode_AFSFetchVolumeStatus(&bp, call->reply2);
1456 call->offset = 0;
1457 call->unmarshall++;
1458
1459 /* extract the volume name length */
1460 case 2:
1461 ret = afs_extract_data(call, &call->tmp, 4, true);
1462 if (ret < 0)
1463 return ret;
1464
1465 call->count = ntohl(call->tmp);
1466 _debug("volname length: %u", call->count);
1467 if (call->count >= AFSNAMEMAX)
1468 return -EBADMSG;
1469 call->offset = 0;
1470 call->unmarshall++;
1471
1472 /* extract the volume name */
1473 case 3:
1474 _debug("extract volname");
1475 if (call->count > 0) {
1476 ret = afs_extract_data(call, call->reply3,
1477 call->count, true);
1478 if (ret < 0)
1479 return ret;
1480 }
1481
1482 p = call->reply3;
1483 p[call->count] = 0;
1484 _debug("volname '%s'", p);
1485
1486 call->offset = 0;
1487 call->unmarshall++;
1488
1489 /* extract the volume name padding */
1490 if ((call->count & 3) == 0) {
1491 call->unmarshall++;
1492 goto no_volname_padding;
1493 }
1494 call->count = 4 - (call->count & 3);
1495
1496 case 4:
1497 ret = afs_extract_data(call, call->buffer,
1498 call->count, true);
1499 if (ret < 0)
1500 return ret;
1501
1502 call->offset = 0;
1503 call->unmarshall++;
1504 no_volname_padding:
1505
1506 /* extract the offline message length */
1507 case 5:
1508 ret = afs_extract_data(call, &call->tmp, 4, true);
1509 if (ret < 0)
1510 return ret;
1511
1512 call->count = ntohl(call->tmp);
1513 _debug("offline msg length: %u", call->count);
1514 if (call->count >= AFSNAMEMAX)
1515 return -EBADMSG;
1516 call->offset = 0;
1517 call->unmarshall++;
1518
1519 /* extract the offline message */
1520 case 6:
1521 _debug("extract offline");
1522 if (call->count > 0) {
1523 ret = afs_extract_data(call, call->reply3,
1524 call->count, true);
1525 if (ret < 0)
1526 return ret;
1527 }
1528
1529 p = call->reply3;
1530 p[call->count] = 0;
1531 _debug("offline '%s'", p);
1532
1533 call->offset = 0;
1534 call->unmarshall++;
1535
1536 /* extract the offline message padding */
1537 if ((call->count & 3) == 0) {
1538 call->unmarshall++;
1539 goto no_offline_padding;
1540 }
1541 call->count = 4 - (call->count & 3);
1542
1543 case 7:
1544 ret = afs_extract_data(call, call->buffer,
1545 call->count, true);
1546 if (ret < 0)
1547 return ret;
1548
1549 call->offset = 0;
1550 call->unmarshall++;
1551 no_offline_padding:
1552
1553 /* extract the message of the day length */
1554 case 8:
1555 ret = afs_extract_data(call, &call->tmp, 4, true);
1556 if (ret < 0)
1557 return ret;
1558
1559 call->count = ntohl(call->tmp);
1560 _debug("motd length: %u", call->count);
1561 if (call->count >= AFSNAMEMAX)
1562 return -EBADMSG;
1563 call->offset = 0;
1564 call->unmarshall++;
1565
1566 /* extract the message of the day */
1567 case 9:
1568 _debug("extract motd");
1569 if (call->count > 0) {
1570 ret = afs_extract_data(call, call->reply3,
1571 call->count, true);
1572 if (ret < 0)
1573 return ret;
1574 }
1575
1576 p = call->reply3;
1577 p[call->count] = 0;
1578 _debug("motd '%s'", p);
1579
1580 call->offset = 0;
1581 call->unmarshall++;
1582
1583 /* extract the message of the day padding */
1584 call->count = (4 - (call->count & 3)) & 3;
1585
1586 case 10:
1587 ret = afs_extract_data(call, call->buffer,
1588 call->count, false);
1589 if (ret < 0)
1590 return ret;
1591
1592 call->offset = 0;
1593 call->unmarshall++;
1594 case 11:
1595 break;
1596 }
1597
1598 _leave(" = 0 [done]");
1599 return 0;
1600}
1601
1602/*
1603 * destroy an FS.GetVolumeStatus call
1604 */
1605static void afs_get_volume_status_call_destructor(struct afs_call *call)
1606{
1607 kfree(call->reply3);
1608 call->reply3 = NULL;
1609 afs_flat_call_destructor(call);
1610}
1611
1612/*
1613 * FS.GetVolumeStatus operation type
1614 */
1615static const struct afs_call_type afs_RXFSGetVolumeStatus = {
1616 .name = "FS.GetVolumeStatus",
1617 .deliver = afs_deliver_fs_get_volume_status,
1618 .abort_to_error = afs_abort_to_error,
1619 .destructor = afs_get_volume_status_call_destructor,
1620};
1621
1622/*
1623 * fetch the status of a volume
1624 */
1625int afs_fs_get_volume_status(struct afs_server *server,
1626 struct key *key,
1627 struct afs_vnode *vnode,
1628 struct afs_volume_status *vs,
1629 const struct afs_wait_mode *wait_mode)
1630{
1631 struct afs_call *call;
1632 __be32 *bp;
1633 void *tmpbuf;
1634
1635 _enter("");
1636
1637 tmpbuf = kmalloc(AFSOPAQUEMAX, GFP_KERNEL);
1638 if (!tmpbuf)
1639 return -ENOMEM;
1640
1641 call = afs_alloc_flat_call(&afs_RXFSGetVolumeStatus, 2 * 4, 12 * 4);
1642 if (!call) {
1643 kfree(tmpbuf);
1644 return -ENOMEM;
1645 }
1646
1647 call->key = key;
1648 call->reply = vnode;
1649 call->reply2 = vs;
1650 call->reply3 = tmpbuf;
1651 call->service_id = FS_SERVICE;
1652 call->port = htons(AFS_FS_PORT);
1653
1654 /* marshall the parameters */
1655 bp = call->request;
1656 bp[0] = htonl(FSGETVOLUMESTATUS);
1657 bp[1] = htonl(vnode->fid.vid);
1658
1659 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1660}
1661
1662/*
1663 * deliver reply data to an FS.SetLock, FS.ExtendLock or FS.ReleaseLock
1664 */
1665static int afs_deliver_fs_xxxx_lock(struct afs_call *call)
1666{
1667 const __be32 *bp;
1668 int ret;
1669
1670 _enter("{%u}", call->unmarshall);
1671
1672 ret = afs_transfer_reply(call);
1673 if (ret < 0)
1674 return ret;
1675
1676 /* unmarshall the reply once we've received all of it */
1677 bp = call->buffer;
1678 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
1679
1680 _leave(" = 0 [done]");
1681 return 0;
1682}
1683
1684/*
1685 * FS.SetLock operation type
1686 */
1687static const struct afs_call_type afs_RXFSSetLock = {
1688 .name = "FS.SetLock",
1689 .deliver = afs_deliver_fs_xxxx_lock,
1690 .abort_to_error = afs_abort_to_error,
1691 .destructor = afs_flat_call_destructor,
1692};
1693
1694/*
1695 * FS.ExtendLock operation type
1696 */
1697static const struct afs_call_type afs_RXFSExtendLock = {
1698 .name = "FS.ExtendLock",
1699 .deliver = afs_deliver_fs_xxxx_lock,
1700 .abort_to_error = afs_abort_to_error,
1701 .destructor = afs_flat_call_destructor,
1702};
1703
1704/*
1705 * FS.ReleaseLock operation type
1706 */
1707static const struct afs_call_type afs_RXFSReleaseLock = {
1708 .name = "FS.ReleaseLock",
1709 .deliver = afs_deliver_fs_xxxx_lock,
1710 .abort_to_error = afs_abort_to_error,
1711 .destructor = afs_flat_call_destructor,
1712};
1713
1714/*
1715 * get a lock on a file
1716 */
1717int afs_fs_set_lock(struct afs_server *server,
1718 struct key *key,
1719 struct afs_vnode *vnode,
1720 afs_lock_type_t type,
1721 const struct afs_wait_mode *wait_mode)
1722{
1723 struct afs_call *call;
1724 __be32 *bp;
1725
1726 _enter("");
1727
1728 call = afs_alloc_flat_call(&afs_RXFSSetLock, 5 * 4, 6 * 4);
1729 if (!call)
1730 return -ENOMEM;
1731
1732 call->key = key;
1733 call->reply = vnode;
1734 call->service_id = FS_SERVICE;
1735 call->port = htons(AFS_FS_PORT);
1736
1737 /* marshall the parameters */
1738 bp = call->request;
1739 *bp++ = htonl(FSSETLOCK);
1740 *bp++ = htonl(vnode->fid.vid);
1741 *bp++ = htonl(vnode->fid.vnode);
1742 *bp++ = htonl(vnode->fid.unique);
1743 *bp++ = htonl(type);
1744
1745 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1746}
1747
1748/*
1749 * extend a lock on a file
1750 */
1751int afs_fs_extend_lock(struct afs_server *server,
1752 struct key *key,
1753 struct afs_vnode *vnode,
1754 const struct afs_wait_mode *wait_mode)
1755{
1756 struct afs_call *call;
1757 __be32 *bp;
1758
1759 _enter("");
1760
1761 call = afs_alloc_flat_call(&afs_RXFSExtendLock, 4 * 4, 6 * 4);
1762 if (!call)
1763 return -ENOMEM;
1764
1765 call->key = key;
1766 call->reply = vnode;
1767 call->service_id = FS_SERVICE;
1768 call->port = htons(AFS_FS_PORT);
1769
1770 /* marshall the parameters */
1771 bp = call->request;
1772 *bp++ = htonl(FSEXTENDLOCK);
1773 *bp++ = htonl(vnode->fid.vid);
1774 *bp++ = htonl(vnode->fid.vnode);
1775 *bp++ = htonl(vnode->fid.unique);
1776
1777 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1778}
1779
1780/*
1781 * release a lock on a file
1782 */
1783int afs_fs_release_lock(struct afs_server *server,
1784 struct key *key,
1785 struct afs_vnode *vnode,
1786 const struct afs_wait_mode *wait_mode)
1787{
1788 struct afs_call *call;
1789 __be32 *bp;
1790
1791 _enter("");
1792
1793 call = afs_alloc_flat_call(&afs_RXFSReleaseLock, 4 * 4, 6 * 4);
1794 if (!call)
1795 return -ENOMEM;
1796
1797 call->key = key;
1798 call->reply = vnode;
1799 call->service_id = FS_SERVICE;
1800 call->port = htons(AFS_FS_PORT);
1801
1802 /* marshall the parameters */
1803 bp = call->request;
1804 *bp++ = htonl(FSRELEASELOCK);
1805 *bp++ = htonl(vnode->fid.vid);
1806 *bp++ = htonl(vnode->fid.vnode);
1807 *bp++ = htonl(vnode->fid.unique);
1808
1809 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1810}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/* AFS File Server client stubs
3 *
4 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8#include <linux/init.h>
9#include <linux/slab.h>
10#include <linux/sched.h>
11#include <linux/circ_buf.h>
12#include <linux/iversion.h>
13#include "internal.h"
14#include "afs_fs.h"
15#include "xdr_fs.h"
16#include "protocol_yfs.h"
17
18static inline void afs_use_fs_server(struct afs_call *call, struct afs_cb_interest *cbi)
19{
20 call->cbi = afs_get_cb_interest(cbi);
21}
22
23/*
24 * decode an AFSFid block
25 */
26static void xdr_decode_AFSFid(const __be32 **_bp, struct afs_fid *fid)
27{
28 const __be32 *bp = *_bp;
29
30 fid->vid = ntohl(*bp++);
31 fid->vnode = ntohl(*bp++);
32 fid->unique = ntohl(*bp++);
33 *_bp = bp;
34}
35
36/*
37 * Dump a bad file status record.
38 */
39static void xdr_dump_bad(const __be32 *bp)
40{
41 __be32 x[4];
42 int i;
43
44 pr_notice("AFS XDR: Bad status record\n");
45 for (i = 0; i < 5 * 4 * 4; i += 16) {
46 memcpy(x, bp, 16);
47 bp += 4;
48 pr_notice("%03x: %08x %08x %08x %08x\n",
49 i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
50 }
51
52 memcpy(x, bp, 4);
53 pr_notice("0x50: %08x\n", ntohl(x[0]));
54}
55
56/*
57 * decode an AFSFetchStatus block
58 */
59static int xdr_decode_AFSFetchStatus(const __be32 **_bp,
60 struct afs_call *call,
61 struct afs_status_cb *scb)
62{
63 const struct afs_xdr_AFSFetchStatus *xdr = (const void *)*_bp;
64 struct afs_file_status *status = &scb->status;
65 bool inline_error = (call->operation_ID == afs_FS_InlineBulkStatus);
66 u64 data_version, size;
67 u32 type, abort_code;
68
69 abort_code = ntohl(xdr->abort_code);
70
71 if (xdr->if_version != htonl(AFS_FSTATUS_VERSION)) {
72 if (xdr->if_version == htonl(0) &&
73 abort_code != 0 &&
74 inline_error) {
75 /* The OpenAFS fileserver has a bug in FS.InlineBulkStatus
76 * whereby it doesn't set the interface version in the error
77 * case.
78 */
79 status->abort_code = abort_code;
80 scb->have_error = true;
81 return 0;
82 }
83
84 pr_warn("Unknown AFSFetchStatus version %u\n", ntohl(xdr->if_version));
85 goto bad;
86 }
87
88 if (abort_code != 0 && inline_error) {
89 status->abort_code = abort_code;
90 return 0;
91 }
92
93 type = ntohl(xdr->type);
94 switch (type) {
95 case AFS_FTYPE_FILE:
96 case AFS_FTYPE_DIR:
97 case AFS_FTYPE_SYMLINK:
98 status->type = type;
99 break;
100 default:
101 goto bad;
102 }
103
104 status->nlink = ntohl(xdr->nlink);
105 status->author = ntohl(xdr->author);
106 status->owner = ntohl(xdr->owner);
107 status->caller_access = ntohl(xdr->caller_access); /* Ticket dependent */
108 status->anon_access = ntohl(xdr->anon_access);
109 status->mode = ntohl(xdr->mode) & S_IALLUGO;
110 status->group = ntohl(xdr->group);
111 status->lock_count = ntohl(xdr->lock_count);
112
113 status->mtime_client.tv_sec = ntohl(xdr->mtime_client);
114 status->mtime_client.tv_nsec = 0;
115 status->mtime_server.tv_sec = ntohl(xdr->mtime_server);
116 status->mtime_server.tv_nsec = 0;
117
118 size = (u64)ntohl(xdr->size_lo);
119 size |= (u64)ntohl(xdr->size_hi) << 32;
120 status->size = size;
121
122 data_version = (u64)ntohl(xdr->data_version_lo);
123 data_version |= (u64)ntohl(xdr->data_version_hi) << 32;
124 status->data_version = data_version;
125 scb->have_status = true;
126
127 *_bp = (const void *)*_bp + sizeof(*xdr);
128 return 0;
129
130bad:
131 xdr_dump_bad(*_bp);
132 return afs_protocol_error(call, -EBADMSG, afs_eproto_bad_status);
133}
134
135static time64_t xdr_decode_expiry(struct afs_call *call, u32 expiry)
136{
137 return ktime_divns(call->reply_time, NSEC_PER_SEC) + expiry;
138}
139
140static void xdr_decode_AFSCallBack(const __be32 **_bp,
141 struct afs_call *call,
142 struct afs_status_cb *scb)
143{
144 struct afs_callback *cb = &scb->callback;
145 const __be32 *bp = *_bp;
146
147 bp++; /* version */
148 cb->expires_at = xdr_decode_expiry(call, ntohl(*bp++));
149 bp++; /* type */
150 scb->have_cb = true;
151 *_bp = bp;
152}
153
154/*
155 * decode an AFSVolSync block
156 */
157static void xdr_decode_AFSVolSync(const __be32 **_bp,
158 struct afs_volsync *volsync)
159{
160 const __be32 *bp = *_bp;
161 u32 creation;
162
163 creation = ntohl(*bp++);
164 bp++; /* spare2 */
165 bp++; /* spare3 */
166 bp++; /* spare4 */
167 bp++; /* spare5 */
168 bp++; /* spare6 */
169 *_bp = bp;
170
171 if (volsync)
172 volsync->creation = creation;
173}
174
175/*
176 * encode the requested attributes into an AFSStoreStatus block
177 */
178static void xdr_encode_AFS_StoreStatus(__be32 **_bp, struct iattr *attr)
179{
180 __be32 *bp = *_bp;
181 u32 mask = 0, mtime = 0, owner = 0, group = 0, mode = 0;
182
183 mask = 0;
184 if (attr->ia_valid & ATTR_MTIME) {
185 mask |= AFS_SET_MTIME;
186 mtime = attr->ia_mtime.tv_sec;
187 }
188
189 if (attr->ia_valid & ATTR_UID) {
190 mask |= AFS_SET_OWNER;
191 owner = from_kuid(&init_user_ns, attr->ia_uid);
192 }
193
194 if (attr->ia_valid & ATTR_GID) {
195 mask |= AFS_SET_GROUP;
196 group = from_kgid(&init_user_ns, attr->ia_gid);
197 }
198
199 if (attr->ia_valid & ATTR_MODE) {
200 mask |= AFS_SET_MODE;
201 mode = attr->ia_mode & S_IALLUGO;
202 }
203
204 *bp++ = htonl(mask);
205 *bp++ = htonl(mtime);
206 *bp++ = htonl(owner);
207 *bp++ = htonl(group);
208 *bp++ = htonl(mode);
209 *bp++ = 0; /* segment size */
210 *_bp = bp;
211}
212
213/*
214 * decode an AFSFetchVolumeStatus block
215 */
216static void xdr_decode_AFSFetchVolumeStatus(const __be32 **_bp,
217 struct afs_volume_status *vs)
218{
219 const __be32 *bp = *_bp;
220
221 vs->vid = ntohl(*bp++);
222 vs->parent_id = ntohl(*bp++);
223 vs->online = ntohl(*bp++);
224 vs->in_service = ntohl(*bp++);
225 vs->blessed = ntohl(*bp++);
226 vs->needs_salvage = ntohl(*bp++);
227 vs->type = ntohl(*bp++);
228 vs->min_quota = ntohl(*bp++);
229 vs->max_quota = ntohl(*bp++);
230 vs->blocks_in_use = ntohl(*bp++);
231 vs->part_blocks_avail = ntohl(*bp++);
232 vs->part_max_blocks = ntohl(*bp++);
233 vs->vol_copy_date = 0;
234 vs->vol_backup_date = 0;
235 *_bp = bp;
236}
237
238/*
239 * deliver reply data to an FS.FetchStatus
240 */
241static int afs_deliver_fs_fetch_status_vnode(struct afs_call *call)
242{
243 const __be32 *bp;
244 int ret;
245
246 ret = afs_transfer_reply(call);
247 if (ret < 0)
248 return ret;
249
250 /* unmarshall the reply once we've received all of it */
251 bp = call->buffer;
252 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
253 if (ret < 0)
254 return ret;
255 xdr_decode_AFSCallBack(&bp, call, call->out_scb);
256 xdr_decode_AFSVolSync(&bp, call->out_volsync);
257
258 _leave(" = 0 [done]");
259 return 0;
260}
261
262/*
263 * FS.FetchStatus operation type
264 */
265static const struct afs_call_type afs_RXFSFetchStatus_vnode = {
266 .name = "FS.FetchStatus(vnode)",
267 .op = afs_FS_FetchStatus,
268 .deliver = afs_deliver_fs_fetch_status_vnode,
269 .destructor = afs_flat_call_destructor,
270};
271
272/*
273 * fetch the status information for a file
274 */
275int afs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_status_cb *scb,
276 struct afs_volsync *volsync)
277{
278 struct afs_vnode *vnode = fc->vnode;
279 struct afs_call *call;
280 struct afs_net *net = afs_v2net(vnode);
281 __be32 *bp;
282
283 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
284 return yfs_fs_fetch_file_status(fc, scb, volsync);
285
286 _enter(",%x,{%llx:%llu},,",
287 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
288
289 call = afs_alloc_flat_call(net, &afs_RXFSFetchStatus_vnode,
290 16, (21 + 3 + 6) * 4);
291 if (!call) {
292 fc->ac.error = -ENOMEM;
293 return -ENOMEM;
294 }
295
296 call->key = fc->key;
297 call->out_scb = scb;
298 call->out_volsync = volsync;
299
300 /* marshall the parameters */
301 bp = call->request;
302 bp[0] = htonl(FSFETCHSTATUS);
303 bp[1] = htonl(vnode->fid.vid);
304 bp[2] = htonl(vnode->fid.vnode);
305 bp[3] = htonl(vnode->fid.unique);
306
307 afs_use_fs_server(call, fc->cbi);
308 trace_afs_make_fs_call(call, &vnode->fid);
309
310 afs_set_fc_call(call, fc);
311 afs_make_call(&fc->ac, call, GFP_NOFS);
312 return afs_wait_for_call_to_complete(call, &fc->ac);
313}
314
315/*
316 * deliver reply data to an FS.FetchData
317 */
318static int afs_deliver_fs_fetch_data(struct afs_call *call)
319{
320 struct afs_read *req = call->read_request;
321 const __be32 *bp;
322 unsigned int size;
323 int ret;
324
325 _enter("{%u,%zu/%llu}",
326 call->unmarshall, iov_iter_count(&call->iter), req->actual_len);
327
328 switch (call->unmarshall) {
329 case 0:
330 req->actual_len = 0;
331 req->index = 0;
332 req->offset = req->pos & (PAGE_SIZE - 1);
333 call->unmarshall++;
334 if (call->operation_ID == FSFETCHDATA64) {
335 afs_extract_to_tmp64(call);
336 } else {
337 call->tmp_u = htonl(0);
338 afs_extract_to_tmp(call);
339 }
340 /* Fall through */
341
342 /* extract the returned data length */
343 case 1:
344 _debug("extract data length");
345 ret = afs_extract_data(call, true);
346 if (ret < 0)
347 return ret;
348
349 req->actual_len = be64_to_cpu(call->tmp64);
350 _debug("DATA length: %llu", req->actual_len);
351 req->remain = min(req->len, req->actual_len);
352 if (req->remain == 0)
353 goto no_more_data;
354
355 call->unmarshall++;
356
357 begin_page:
358 ASSERTCMP(req->index, <, req->nr_pages);
359 if (req->remain > PAGE_SIZE - req->offset)
360 size = PAGE_SIZE - req->offset;
361 else
362 size = req->remain;
363 call->bvec[0].bv_len = size;
364 call->bvec[0].bv_offset = req->offset;
365 call->bvec[0].bv_page = req->pages[req->index];
366 iov_iter_bvec(&call->iter, READ, call->bvec, 1, size);
367 ASSERTCMP(size, <=, PAGE_SIZE);
368 /* Fall through */
369
370 /* extract the returned data */
371 case 2:
372 _debug("extract data %zu/%llu",
373 iov_iter_count(&call->iter), req->remain);
374
375 ret = afs_extract_data(call, true);
376 if (ret < 0)
377 return ret;
378 req->remain -= call->bvec[0].bv_len;
379 req->offset += call->bvec[0].bv_len;
380 ASSERTCMP(req->offset, <=, PAGE_SIZE);
381 if (req->offset == PAGE_SIZE) {
382 req->offset = 0;
383 if (req->page_done)
384 req->page_done(req);
385 req->index++;
386 if (req->remain > 0)
387 goto begin_page;
388 }
389
390 ASSERTCMP(req->remain, ==, 0);
391 if (req->actual_len <= req->len)
392 goto no_more_data;
393
394 /* Discard any excess data the server gave us */
395 afs_extract_discard(call, req->actual_len - req->len);
396 call->unmarshall = 3;
397 /* Fall through */
398
399 case 3:
400 _debug("extract discard %zu/%llu",
401 iov_iter_count(&call->iter), req->actual_len - req->len);
402
403 ret = afs_extract_data(call, true);
404 if (ret < 0)
405 return ret;
406
407 no_more_data:
408 call->unmarshall = 4;
409 afs_extract_to_buf(call, (21 + 3 + 6) * 4);
410 /* Fall through */
411
412 /* extract the metadata */
413 case 4:
414 ret = afs_extract_data(call, false);
415 if (ret < 0)
416 return ret;
417
418 bp = call->buffer;
419 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
420 if (ret < 0)
421 return ret;
422 xdr_decode_AFSCallBack(&bp, call, call->out_scb);
423 xdr_decode_AFSVolSync(&bp, call->out_volsync);
424
425 req->data_version = call->out_scb->status.data_version;
426 req->file_size = call->out_scb->status.size;
427
428 call->unmarshall++;
429
430 case 5:
431 break;
432 }
433
434 for (; req->index < req->nr_pages; req->index++) {
435 if (req->offset < PAGE_SIZE)
436 zero_user_segment(req->pages[req->index],
437 req->offset, PAGE_SIZE);
438 if (req->page_done)
439 req->page_done(req);
440 req->offset = 0;
441 }
442
443 _leave(" = 0 [done]");
444 return 0;
445}
446
447static void afs_fetch_data_destructor(struct afs_call *call)
448{
449 struct afs_read *req = call->read_request;
450
451 afs_put_read(req);
452 afs_flat_call_destructor(call);
453}
454
455/*
456 * FS.FetchData operation type
457 */
458static const struct afs_call_type afs_RXFSFetchData = {
459 .name = "FS.FetchData",
460 .op = afs_FS_FetchData,
461 .deliver = afs_deliver_fs_fetch_data,
462 .destructor = afs_fetch_data_destructor,
463};
464
465static const struct afs_call_type afs_RXFSFetchData64 = {
466 .name = "FS.FetchData64",
467 .op = afs_FS_FetchData64,
468 .deliver = afs_deliver_fs_fetch_data,
469 .destructor = afs_fetch_data_destructor,
470};
471
472/*
473 * fetch data from a very large file
474 */
475static int afs_fs_fetch_data64(struct afs_fs_cursor *fc,
476 struct afs_status_cb *scb,
477 struct afs_read *req)
478{
479 struct afs_vnode *vnode = fc->vnode;
480 struct afs_call *call;
481 struct afs_net *net = afs_v2net(vnode);
482 __be32 *bp;
483
484 _enter("");
485
486 call = afs_alloc_flat_call(net, &afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4);
487 if (!call)
488 return -ENOMEM;
489
490 call->key = fc->key;
491 call->out_scb = scb;
492 call->out_volsync = NULL;
493 call->read_request = req;
494
495 /* marshall the parameters */
496 bp = call->request;
497 bp[0] = htonl(FSFETCHDATA64);
498 bp[1] = htonl(vnode->fid.vid);
499 bp[2] = htonl(vnode->fid.vnode);
500 bp[3] = htonl(vnode->fid.unique);
501 bp[4] = htonl(upper_32_bits(req->pos));
502 bp[5] = htonl(lower_32_bits(req->pos));
503 bp[6] = 0;
504 bp[7] = htonl(lower_32_bits(req->len));
505
506 refcount_inc(&req->usage);
507 afs_use_fs_server(call, fc->cbi);
508 trace_afs_make_fs_call(call, &vnode->fid);
509 afs_set_fc_call(call, fc);
510 afs_make_call(&fc->ac, call, GFP_NOFS);
511 return afs_wait_for_call_to_complete(call, &fc->ac);
512}
513
514/*
515 * fetch data from a file
516 */
517int afs_fs_fetch_data(struct afs_fs_cursor *fc,
518 struct afs_status_cb *scb,
519 struct afs_read *req)
520{
521 struct afs_vnode *vnode = fc->vnode;
522 struct afs_call *call;
523 struct afs_net *net = afs_v2net(vnode);
524 __be32 *bp;
525
526 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
527 return yfs_fs_fetch_data(fc, scb, req);
528
529 if (upper_32_bits(req->pos) ||
530 upper_32_bits(req->len) ||
531 upper_32_bits(req->pos + req->len))
532 return afs_fs_fetch_data64(fc, scb, req);
533
534 _enter("");
535
536 call = afs_alloc_flat_call(net, &afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
537 if (!call)
538 return -ENOMEM;
539
540 call->key = fc->key;
541 call->out_scb = scb;
542 call->out_volsync = NULL;
543 call->read_request = req;
544
545 /* marshall the parameters */
546 bp = call->request;
547 bp[0] = htonl(FSFETCHDATA);
548 bp[1] = htonl(vnode->fid.vid);
549 bp[2] = htonl(vnode->fid.vnode);
550 bp[3] = htonl(vnode->fid.unique);
551 bp[4] = htonl(lower_32_bits(req->pos));
552 bp[5] = htonl(lower_32_bits(req->len));
553
554 refcount_inc(&req->usage);
555 afs_use_fs_server(call, fc->cbi);
556 trace_afs_make_fs_call(call, &vnode->fid);
557 afs_set_fc_call(call, fc);
558 afs_make_call(&fc->ac, call, GFP_NOFS);
559 return afs_wait_for_call_to_complete(call, &fc->ac);
560}
561
562/*
563 * deliver reply data to an FS.CreateFile or an FS.MakeDir
564 */
565static int afs_deliver_fs_create_vnode(struct afs_call *call)
566{
567 const __be32 *bp;
568 int ret;
569
570 ret = afs_transfer_reply(call);
571 if (ret < 0)
572 return ret;
573
574 /* unmarshall the reply once we've received all of it */
575 bp = call->buffer;
576 xdr_decode_AFSFid(&bp, call->out_fid);
577 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
578 if (ret < 0)
579 return ret;
580 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb);
581 if (ret < 0)
582 return ret;
583 xdr_decode_AFSCallBack(&bp, call, call->out_scb);
584 xdr_decode_AFSVolSync(&bp, call->out_volsync);
585
586 _leave(" = 0 [done]");
587 return 0;
588}
589
590/*
591 * FS.CreateFile and FS.MakeDir operation type
592 */
593static const struct afs_call_type afs_RXFSCreateFile = {
594 .name = "FS.CreateFile",
595 .op = afs_FS_CreateFile,
596 .deliver = afs_deliver_fs_create_vnode,
597 .destructor = afs_flat_call_destructor,
598};
599
600static const struct afs_call_type afs_RXFSMakeDir = {
601 .name = "FS.MakeDir",
602 .op = afs_FS_MakeDir,
603 .deliver = afs_deliver_fs_create_vnode,
604 .destructor = afs_flat_call_destructor,
605};
606
607/*
608 * create a file or make a directory
609 */
610int afs_fs_create(struct afs_fs_cursor *fc,
611 const char *name,
612 umode_t mode,
613 struct afs_status_cb *dvnode_scb,
614 struct afs_fid *newfid,
615 struct afs_status_cb *new_scb)
616{
617 struct afs_vnode *dvnode = fc->vnode;
618 struct afs_call *call;
619 struct afs_net *net = afs_v2net(dvnode);
620 size_t namesz, reqsz, padsz;
621 __be32 *bp;
622
623 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags)){
624 if (S_ISDIR(mode))
625 return yfs_fs_make_dir(fc, name, mode, dvnode_scb,
626 newfid, new_scb);
627 else
628 return yfs_fs_create_file(fc, name, mode, dvnode_scb,
629 newfid, new_scb);
630 }
631
632 _enter("");
633
634 namesz = strlen(name);
635 padsz = (4 - (namesz & 3)) & 3;
636 reqsz = (5 * 4) + namesz + padsz + (6 * 4);
637
638 call = afs_alloc_flat_call(
639 net, S_ISDIR(mode) ? &afs_RXFSMakeDir : &afs_RXFSCreateFile,
640 reqsz, (3 + 21 + 21 + 3 + 6) * 4);
641 if (!call)
642 return -ENOMEM;
643
644 call->key = fc->key;
645 call->out_dir_scb = dvnode_scb;
646 call->out_fid = newfid;
647 call->out_scb = new_scb;
648
649 /* marshall the parameters */
650 bp = call->request;
651 *bp++ = htonl(S_ISDIR(mode) ? FSMAKEDIR : FSCREATEFILE);
652 *bp++ = htonl(dvnode->fid.vid);
653 *bp++ = htonl(dvnode->fid.vnode);
654 *bp++ = htonl(dvnode->fid.unique);
655 *bp++ = htonl(namesz);
656 memcpy(bp, name, namesz);
657 bp = (void *) bp + namesz;
658 if (padsz > 0) {
659 memset(bp, 0, padsz);
660 bp = (void *) bp + padsz;
661 }
662 *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
663 *bp++ = htonl(dvnode->vfs_inode.i_mtime.tv_sec); /* mtime */
664 *bp++ = 0; /* owner */
665 *bp++ = 0; /* group */
666 *bp++ = htonl(mode & S_IALLUGO); /* unix mode */
667 *bp++ = 0; /* segment size */
668
669 afs_use_fs_server(call, fc->cbi);
670 trace_afs_make_fs_call1(call, &dvnode->fid, name);
671 afs_set_fc_call(call, fc);
672 afs_make_call(&fc->ac, call, GFP_NOFS);
673 return afs_wait_for_call_to_complete(call, &fc->ac);
674}
675
676/*
677 * Deliver reply data to any operation that returns directory status and volume
678 * sync.
679 */
680static int afs_deliver_fs_dir_status_and_vol(struct afs_call *call)
681{
682 const __be32 *bp;
683 int ret;
684
685 ret = afs_transfer_reply(call);
686 if (ret < 0)
687 return ret;
688
689 /* unmarshall the reply once we've received all of it */
690 bp = call->buffer;
691 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb);
692 if (ret < 0)
693 return ret;
694 xdr_decode_AFSVolSync(&bp, call->out_volsync);
695
696 _leave(" = 0 [done]");
697 return 0;
698}
699
700/*
701 * FS.RemoveDir/FS.RemoveFile operation type
702 */
703static const struct afs_call_type afs_RXFSRemoveFile = {
704 .name = "FS.RemoveFile",
705 .op = afs_FS_RemoveFile,
706 .deliver = afs_deliver_fs_dir_status_and_vol,
707 .destructor = afs_flat_call_destructor,
708};
709
710static const struct afs_call_type afs_RXFSRemoveDir = {
711 .name = "FS.RemoveDir",
712 .op = afs_FS_RemoveDir,
713 .deliver = afs_deliver_fs_dir_status_and_vol,
714 .destructor = afs_flat_call_destructor,
715};
716
717/*
718 * remove a file or directory
719 */
720int afs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
721 const char *name, bool isdir, struct afs_status_cb *dvnode_scb)
722{
723 struct afs_vnode *dvnode = fc->vnode;
724 struct afs_call *call;
725 struct afs_net *net = afs_v2net(dvnode);
726 size_t namesz, reqsz, padsz;
727 __be32 *bp;
728
729 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
730 return yfs_fs_remove(fc, vnode, name, isdir, dvnode_scb);
731
732 _enter("");
733
734 namesz = strlen(name);
735 padsz = (4 - (namesz & 3)) & 3;
736 reqsz = (5 * 4) + namesz + padsz;
737
738 call = afs_alloc_flat_call(
739 net, isdir ? &afs_RXFSRemoveDir : &afs_RXFSRemoveFile,
740 reqsz, (21 + 6) * 4);
741 if (!call)
742 return -ENOMEM;
743
744 call->key = fc->key;
745 call->out_dir_scb = dvnode_scb;
746
747 /* marshall the parameters */
748 bp = call->request;
749 *bp++ = htonl(isdir ? FSREMOVEDIR : FSREMOVEFILE);
750 *bp++ = htonl(dvnode->fid.vid);
751 *bp++ = htonl(dvnode->fid.vnode);
752 *bp++ = htonl(dvnode->fid.unique);
753 *bp++ = htonl(namesz);
754 memcpy(bp, name, namesz);
755 bp = (void *) bp + namesz;
756 if (padsz > 0) {
757 memset(bp, 0, padsz);
758 bp = (void *) bp + padsz;
759 }
760
761 afs_use_fs_server(call, fc->cbi);
762 trace_afs_make_fs_call1(call, &dvnode->fid, name);
763 afs_set_fc_call(call, fc);
764 afs_make_call(&fc->ac, call, GFP_NOFS);
765 return afs_wait_for_call_to_complete(call, &fc->ac);
766}
767
768/*
769 * deliver reply data to an FS.Link
770 */
771static int afs_deliver_fs_link(struct afs_call *call)
772{
773 const __be32 *bp;
774 int ret;
775
776 _enter("{%u}", call->unmarshall);
777
778 ret = afs_transfer_reply(call);
779 if (ret < 0)
780 return ret;
781
782 /* unmarshall the reply once we've received all of it */
783 bp = call->buffer;
784 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
785 if (ret < 0)
786 return ret;
787 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb);
788 if (ret < 0)
789 return ret;
790 xdr_decode_AFSVolSync(&bp, call->out_volsync);
791
792 _leave(" = 0 [done]");
793 return 0;
794}
795
796/*
797 * FS.Link operation type
798 */
799static const struct afs_call_type afs_RXFSLink = {
800 .name = "FS.Link",
801 .op = afs_FS_Link,
802 .deliver = afs_deliver_fs_link,
803 .destructor = afs_flat_call_destructor,
804};
805
806/*
807 * make a hard link
808 */
809int afs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
810 const char *name,
811 struct afs_status_cb *dvnode_scb,
812 struct afs_status_cb *vnode_scb)
813{
814 struct afs_vnode *dvnode = fc->vnode;
815 struct afs_call *call;
816 struct afs_net *net = afs_v2net(vnode);
817 size_t namesz, reqsz, padsz;
818 __be32 *bp;
819
820 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
821 return yfs_fs_link(fc, vnode, name, dvnode_scb, vnode_scb);
822
823 _enter("");
824
825 namesz = strlen(name);
826 padsz = (4 - (namesz & 3)) & 3;
827 reqsz = (5 * 4) + namesz + padsz + (3 * 4);
828
829 call = afs_alloc_flat_call(net, &afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
830 if (!call)
831 return -ENOMEM;
832
833 call->key = fc->key;
834 call->out_dir_scb = dvnode_scb;
835 call->out_scb = vnode_scb;
836
837 /* marshall the parameters */
838 bp = call->request;
839 *bp++ = htonl(FSLINK);
840 *bp++ = htonl(dvnode->fid.vid);
841 *bp++ = htonl(dvnode->fid.vnode);
842 *bp++ = htonl(dvnode->fid.unique);
843 *bp++ = htonl(namesz);
844 memcpy(bp, name, namesz);
845 bp = (void *) bp + namesz;
846 if (padsz > 0) {
847 memset(bp, 0, padsz);
848 bp = (void *) bp + padsz;
849 }
850 *bp++ = htonl(vnode->fid.vid);
851 *bp++ = htonl(vnode->fid.vnode);
852 *bp++ = htonl(vnode->fid.unique);
853
854 afs_use_fs_server(call, fc->cbi);
855 trace_afs_make_fs_call1(call, &vnode->fid, name);
856 afs_set_fc_call(call, fc);
857 afs_make_call(&fc->ac, call, GFP_NOFS);
858 return afs_wait_for_call_to_complete(call, &fc->ac);
859}
860
861/*
862 * deliver reply data to an FS.Symlink
863 */
864static int afs_deliver_fs_symlink(struct afs_call *call)
865{
866 const __be32 *bp;
867 int ret;
868
869 _enter("{%u}", call->unmarshall);
870
871 ret = afs_transfer_reply(call);
872 if (ret < 0)
873 return ret;
874
875 /* unmarshall the reply once we've received all of it */
876 bp = call->buffer;
877 xdr_decode_AFSFid(&bp, call->out_fid);
878 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
879 if (ret < 0)
880 return ret;
881 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb);
882 if (ret < 0)
883 return ret;
884 xdr_decode_AFSVolSync(&bp, call->out_volsync);
885
886 _leave(" = 0 [done]");
887 return 0;
888}
889
890/*
891 * FS.Symlink operation type
892 */
893static const struct afs_call_type afs_RXFSSymlink = {
894 .name = "FS.Symlink",
895 .op = afs_FS_Symlink,
896 .deliver = afs_deliver_fs_symlink,
897 .destructor = afs_flat_call_destructor,
898};
899
900/*
901 * create a symbolic link
902 */
903int afs_fs_symlink(struct afs_fs_cursor *fc,
904 const char *name,
905 const char *contents,
906 struct afs_status_cb *dvnode_scb,
907 struct afs_fid *newfid,
908 struct afs_status_cb *new_scb)
909{
910 struct afs_vnode *dvnode = fc->vnode;
911 struct afs_call *call;
912 struct afs_net *net = afs_v2net(dvnode);
913 size_t namesz, reqsz, padsz, c_namesz, c_padsz;
914 __be32 *bp;
915
916 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
917 return yfs_fs_symlink(fc, name, contents, dvnode_scb,
918 newfid, new_scb);
919
920 _enter("");
921
922 namesz = strlen(name);
923 padsz = (4 - (namesz & 3)) & 3;
924
925 c_namesz = strlen(contents);
926 c_padsz = (4 - (c_namesz & 3)) & 3;
927
928 reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4);
929
930 call = afs_alloc_flat_call(net, &afs_RXFSSymlink, reqsz,
931 (3 + 21 + 21 + 6) * 4);
932 if (!call)
933 return -ENOMEM;
934
935 call->key = fc->key;
936 call->out_dir_scb = dvnode_scb;
937 call->out_fid = newfid;
938 call->out_scb = new_scb;
939
940 /* marshall the parameters */
941 bp = call->request;
942 *bp++ = htonl(FSSYMLINK);
943 *bp++ = htonl(dvnode->fid.vid);
944 *bp++ = htonl(dvnode->fid.vnode);
945 *bp++ = htonl(dvnode->fid.unique);
946 *bp++ = htonl(namesz);
947 memcpy(bp, name, namesz);
948 bp = (void *) bp + namesz;
949 if (padsz > 0) {
950 memset(bp, 0, padsz);
951 bp = (void *) bp + padsz;
952 }
953 *bp++ = htonl(c_namesz);
954 memcpy(bp, contents, c_namesz);
955 bp = (void *) bp + c_namesz;
956 if (c_padsz > 0) {
957 memset(bp, 0, c_padsz);
958 bp = (void *) bp + c_padsz;
959 }
960 *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
961 *bp++ = htonl(dvnode->vfs_inode.i_mtime.tv_sec); /* mtime */
962 *bp++ = 0; /* owner */
963 *bp++ = 0; /* group */
964 *bp++ = htonl(S_IRWXUGO); /* unix mode */
965 *bp++ = 0; /* segment size */
966
967 afs_use_fs_server(call, fc->cbi);
968 trace_afs_make_fs_call1(call, &dvnode->fid, name);
969 afs_set_fc_call(call, fc);
970 afs_make_call(&fc->ac, call, GFP_NOFS);
971 return afs_wait_for_call_to_complete(call, &fc->ac);
972}
973
974/*
975 * deliver reply data to an FS.Rename
976 */
977static int afs_deliver_fs_rename(struct afs_call *call)
978{
979 const __be32 *bp;
980 int ret;
981
982 ret = afs_transfer_reply(call);
983 if (ret < 0)
984 return ret;
985
986 /* unmarshall the reply once we've received all of it */
987 bp = call->buffer;
988 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb);
989 if (ret < 0)
990 return ret;
991 if (call->out_dir_scb != call->out_scb) {
992 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
993 if (ret < 0)
994 return ret;
995 }
996 xdr_decode_AFSVolSync(&bp, call->out_volsync);
997
998 _leave(" = 0 [done]");
999 return 0;
1000}
1001
1002/*
1003 * FS.Rename operation type
1004 */
1005static const struct afs_call_type afs_RXFSRename = {
1006 .name = "FS.Rename",
1007 .op = afs_FS_Rename,
1008 .deliver = afs_deliver_fs_rename,
1009 .destructor = afs_flat_call_destructor,
1010};
1011
1012/*
1013 * Rename/move a file or directory.
1014 */
1015int afs_fs_rename(struct afs_fs_cursor *fc,
1016 const char *orig_name,
1017 struct afs_vnode *new_dvnode,
1018 const char *new_name,
1019 struct afs_status_cb *orig_dvnode_scb,
1020 struct afs_status_cb *new_dvnode_scb)
1021{
1022 struct afs_vnode *orig_dvnode = fc->vnode;
1023 struct afs_call *call;
1024 struct afs_net *net = afs_v2net(orig_dvnode);
1025 size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz;
1026 __be32 *bp;
1027
1028 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
1029 return yfs_fs_rename(fc, orig_name,
1030 new_dvnode, new_name,
1031 orig_dvnode_scb,
1032 new_dvnode_scb);
1033
1034 _enter("");
1035
1036 o_namesz = strlen(orig_name);
1037 o_padsz = (4 - (o_namesz & 3)) & 3;
1038
1039 n_namesz = strlen(new_name);
1040 n_padsz = (4 - (n_namesz & 3)) & 3;
1041
1042 reqsz = (4 * 4) +
1043 4 + o_namesz + o_padsz +
1044 (3 * 4) +
1045 4 + n_namesz + n_padsz;
1046
1047 call = afs_alloc_flat_call(net, &afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
1048 if (!call)
1049 return -ENOMEM;
1050
1051 call->key = fc->key;
1052 call->out_dir_scb = orig_dvnode_scb;
1053 call->out_scb = new_dvnode_scb;
1054
1055 /* marshall the parameters */
1056 bp = call->request;
1057 *bp++ = htonl(FSRENAME);
1058 *bp++ = htonl(orig_dvnode->fid.vid);
1059 *bp++ = htonl(orig_dvnode->fid.vnode);
1060 *bp++ = htonl(orig_dvnode->fid.unique);
1061 *bp++ = htonl(o_namesz);
1062 memcpy(bp, orig_name, o_namesz);
1063 bp = (void *) bp + o_namesz;
1064 if (o_padsz > 0) {
1065 memset(bp, 0, o_padsz);
1066 bp = (void *) bp + o_padsz;
1067 }
1068
1069 *bp++ = htonl(new_dvnode->fid.vid);
1070 *bp++ = htonl(new_dvnode->fid.vnode);
1071 *bp++ = htonl(new_dvnode->fid.unique);
1072 *bp++ = htonl(n_namesz);
1073 memcpy(bp, new_name, n_namesz);
1074 bp = (void *) bp + n_namesz;
1075 if (n_padsz > 0) {
1076 memset(bp, 0, n_padsz);
1077 bp = (void *) bp + n_padsz;
1078 }
1079
1080 afs_use_fs_server(call, fc->cbi);
1081 trace_afs_make_fs_call2(call, &orig_dvnode->fid, orig_name, new_name);
1082 afs_set_fc_call(call, fc);
1083 afs_make_call(&fc->ac, call, GFP_NOFS);
1084 return afs_wait_for_call_to_complete(call, &fc->ac);
1085}
1086
1087/*
1088 * deliver reply data to an FS.StoreData
1089 */
1090static int afs_deliver_fs_store_data(struct afs_call *call)
1091{
1092 const __be32 *bp;
1093 int ret;
1094
1095 _enter("");
1096
1097 ret = afs_transfer_reply(call);
1098 if (ret < 0)
1099 return ret;
1100
1101 /* unmarshall the reply once we've received all of it */
1102 bp = call->buffer;
1103 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
1104 if (ret < 0)
1105 return ret;
1106 xdr_decode_AFSVolSync(&bp, call->out_volsync);
1107
1108 _leave(" = 0 [done]");
1109 return 0;
1110}
1111
1112/*
1113 * FS.StoreData operation type
1114 */
1115static const struct afs_call_type afs_RXFSStoreData = {
1116 .name = "FS.StoreData",
1117 .op = afs_FS_StoreData,
1118 .deliver = afs_deliver_fs_store_data,
1119 .destructor = afs_flat_call_destructor,
1120};
1121
1122static const struct afs_call_type afs_RXFSStoreData64 = {
1123 .name = "FS.StoreData64",
1124 .op = afs_FS_StoreData64,
1125 .deliver = afs_deliver_fs_store_data,
1126 .destructor = afs_flat_call_destructor,
1127};
1128
1129/*
1130 * store a set of pages to a very large file
1131 */
1132static int afs_fs_store_data64(struct afs_fs_cursor *fc,
1133 struct address_space *mapping,
1134 pgoff_t first, pgoff_t last,
1135 unsigned offset, unsigned to,
1136 loff_t size, loff_t pos, loff_t i_size,
1137 struct afs_status_cb *scb)
1138{
1139 struct afs_vnode *vnode = fc->vnode;
1140 struct afs_call *call;
1141 struct afs_net *net = afs_v2net(vnode);
1142 __be32 *bp;
1143
1144 _enter(",%x,{%llx:%llu},,",
1145 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1146
1147 call = afs_alloc_flat_call(net, &afs_RXFSStoreData64,
1148 (4 + 6 + 3 * 2) * 4,
1149 (21 + 6) * 4);
1150 if (!call)
1151 return -ENOMEM;
1152
1153 call->key = fc->key;
1154 call->mapping = mapping;
1155 call->first = first;
1156 call->last = last;
1157 call->first_offset = offset;
1158 call->last_to = to;
1159 call->send_pages = true;
1160 call->out_scb = scb;
1161
1162 /* marshall the parameters */
1163 bp = call->request;
1164 *bp++ = htonl(FSSTOREDATA64);
1165 *bp++ = htonl(vnode->fid.vid);
1166 *bp++ = htonl(vnode->fid.vnode);
1167 *bp++ = htonl(vnode->fid.unique);
1168
1169 *bp++ = htonl(AFS_SET_MTIME); /* mask */
1170 *bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
1171 *bp++ = 0; /* owner */
1172 *bp++ = 0; /* group */
1173 *bp++ = 0; /* unix mode */
1174 *bp++ = 0; /* segment size */
1175
1176 *bp++ = htonl(pos >> 32);
1177 *bp++ = htonl((u32) pos);
1178 *bp++ = htonl(size >> 32);
1179 *bp++ = htonl((u32) size);
1180 *bp++ = htonl(i_size >> 32);
1181 *bp++ = htonl((u32) i_size);
1182
1183 trace_afs_make_fs_call(call, &vnode->fid);
1184 afs_set_fc_call(call, fc);
1185 afs_make_call(&fc->ac, call, GFP_NOFS);
1186 return afs_wait_for_call_to_complete(call, &fc->ac);
1187}
1188
1189/*
1190 * store a set of pages
1191 */
1192int afs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
1193 pgoff_t first, pgoff_t last,
1194 unsigned offset, unsigned to,
1195 struct afs_status_cb *scb)
1196{
1197 struct afs_vnode *vnode = fc->vnode;
1198 struct afs_call *call;
1199 struct afs_net *net = afs_v2net(vnode);
1200 loff_t size, pos, i_size;
1201 __be32 *bp;
1202
1203 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
1204 return yfs_fs_store_data(fc, mapping, first, last, offset, to, scb);
1205
1206 _enter(",%x,{%llx:%llu},,",
1207 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1208
1209 size = (loff_t)to - (loff_t)offset;
1210 if (first != last)
1211 size += (loff_t)(last - first) << PAGE_SHIFT;
1212 pos = (loff_t)first << PAGE_SHIFT;
1213 pos += offset;
1214
1215 i_size = i_size_read(&vnode->vfs_inode);
1216 if (pos + size > i_size)
1217 i_size = size + pos;
1218
1219 _debug("size %llx, at %llx, i_size %llx",
1220 (unsigned long long) size, (unsigned long long) pos,
1221 (unsigned long long) i_size);
1222
1223 if (pos >> 32 || i_size >> 32 || size >> 32 || (pos + size) >> 32)
1224 return afs_fs_store_data64(fc, mapping, first, last, offset, to,
1225 size, pos, i_size, scb);
1226
1227 call = afs_alloc_flat_call(net, &afs_RXFSStoreData,
1228 (4 + 6 + 3) * 4,
1229 (21 + 6) * 4);
1230 if (!call)
1231 return -ENOMEM;
1232
1233 call->key = fc->key;
1234 call->mapping = mapping;
1235 call->first = first;
1236 call->last = last;
1237 call->first_offset = offset;
1238 call->last_to = to;
1239 call->send_pages = true;
1240 call->out_scb = scb;
1241
1242 /* marshall the parameters */
1243 bp = call->request;
1244 *bp++ = htonl(FSSTOREDATA);
1245 *bp++ = htonl(vnode->fid.vid);
1246 *bp++ = htonl(vnode->fid.vnode);
1247 *bp++ = htonl(vnode->fid.unique);
1248
1249 *bp++ = htonl(AFS_SET_MTIME); /* mask */
1250 *bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
1251 *bp++ = 0; /* owner */
1252 *bp++ = 0; /* group */
1253 *bp++ = 0; /* unix mode */
1254 *bp++ = 0; /* segment size */
1255
1256 *bp++ = htonl(pos);
1257 *bp++ = htonl(size);
1258 *bp++ = htonl(i_size);
1259
1260 afs_use_fs_server(call, fc->cbi);
1261 trace_afs_make_fs_call(call, &vnode->fid);
1262 afs_set_fc_call(call, fc);
1263 afs_make_call(&fc->ac, call, GFP_NOFS);
1264 return afs_wait_for_call_to_complete(call, &fc->ac);
1265}
1266
1267/*
1268 * deliver reply data to an FS.StoreStatus
1269 */
1270static int afs_deliver_fs_store_status(struct afs_call *call)
1271{
1272 const __be32 *bp;
1273 int ret;
1274
1275 _enter("");
1276
1277 ret = afs_transfer_reply(call);
1278 if (ret < 0)
1279 return ret;
1280
1281 /* unmarshall the reply once we've received all of it */
1282 bp = call->buffer;
1283 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
1284 if (ret < 0)
1285 return ret;
1286 xdr_decode_AFSVolSync(&bp, call->out_volsync);
1287
1288 _leave(" = 0 [done]");
1289 return 0;
1290}
1291
1292/*
1293 * FS.StoreStatus operation type
1294 */
1295static const struct afs_call_type afs_RXFSStoreStatus = {
1296 .name = "FS.StoreStatus",
1297 .op = afs_FS_StoreStatus,
1298 .deliver = afs_deliver_fs_store_status,
1299 .destructor = afs_flat_call_destructor,
1300};
1301
1302static const struct afs_call_type afs_RXFSStoreData_as_Status = {
1303 .name = "FS.StoreData",
1304 .op = afs_FS_StoreData,
1305 .deliver = afs_deliver_fs_store_status,
1306 .destructor = afs_flat_call_destructor,
1307};
1308
1309static const struct afs_call_type afs_RXFSStoreData64_as_Status = {
1310 .name = "FS.StoreData64",
1311 .op = afs_FS_StoreData64,
1312 .deliver = afs_deliver_fs_store_status,
1313 .destructor = afs_flat_call_destructor,
1314};
1315
1316/*
1317 * set the attributes on a very large file, using FS.StoreData rather than
1318 * FS.StoreStatus so as to alter the file size also
1319 */
1320static int afs_fs_setattr_size64(struct afs_fs_cursor *fc, struct iattr *attr,
1321 struct afs_status_cb *scb)
1322{
1323 struct afs_vnode *vnode = fc->vnode;
1324 struct afs_call *call;
1325 struct afs_net *net = afs_v2net(vnode);
1326 __be32 *bp;
1327
1328 _enter(",%x,{%llx:%llu},,",
1329 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1330
1331 ASSERT(attr->ia_valid & ATTR_SIZE);
1332
1333 call = afs_alloc_flat_call(net, &afs_RXFSStoreData64_as_Status,
1334 (4 + 6 + 3 * 2) * 4,
1335 (21 + 6) * 4);
1336 if (!call)
1337 return -ENOMEM;
1338
1339 call->key = fc->key;
1340 call->out_scb = scb;
1341
1342 /* marshall the parameters */
1343 bp = call->request;
1344 *bp++ = htonl(FSSTOREDATA64);
1345 *bp++ = htonl(vnode->fid.vid);
1346 *bp++ = htonl(vnode->fid.vnode);
1347 *bp++ = htonl(vnode->fid.unique);
1348
1349 xdr_encode_AFS_StoreStatus(&bp, attr);
1350
1351 *bp++ = htonl(attr->ia_size >> 32); /* position of start of write */
1352 *bp++ = htonl((u32) attr->ia_size);
1353 *bp++ = 0; /* size of write */
1354 *bp++ = 0;
1355 *bp++ = htonl(attr->ia_size >> 32); /* new file length */
1356 *bp++ = htonl((u32) attr->ia_size);
1357
1358 afs_use_fs_server(call, fc->cbi);
1359 trace_afs_make_fs_call(call, &vnode->fid);
1360 afs_set_fc_call(call, fc);
1361 afs_make_call(&fc->ac, call, GFP_NOFS);
1362 return afs_wait_for_call_to_complete(call, &fc->ac);
1363}
1364
1365/*
1366 * set the attributes on a file, using FS.StoreData rather than FS.StoreStatus
1367 * so as to alter the file size also
1368 */
1369static int afs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr,
1370 struct afs_status_cb *scb)
1371{
1372 struct afs_vnode *vnode = fc->vnode;
1373 struct afs_call *call;
1374 struct afs_net *net = afs_v2net(vnode);
1375 __be32 *bp;
1376
1377 _enter(",%x,{%llx:%llu},,",
1378 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1379
1380 ASSERT(attr->ia_valid & ATTR_SIZE);
1381 if (attr->ia_size >> 32)
1382 return afs_fs_setattr_size64(fc, attr, scb);
1383
1384 call = afs_alloc_flat_call(net, &afs_RXFSStoreData_as_Status,
1385 (4 + 6 + 3) * 4,
1386 (21 + 6) * 4);
1387 if (!call)
1388 return -ENOMEM;
1389
1390 call->key = fc->key;
1391 call->out_scb = scb;
1392
1393 /* marshall the parameters */
1394 bp = call->request;
1395 *bp++ = htonl(FSSTOREDATA);
1396 *bp++ = htonl(vnode->fid.vid);
1397 *bp++ = htonl(vnode->fid.vnode);
1398 *bp++ = htonl(vnode->fid.unique);
1399
1400 xdr_encode_AFS_StoreStatus(&bp, attr);
1401
1402 *bp++ = htonl(attr->ia_size); /* position of start of write */
1403 *bp++ = 0; /* size of write */
1404 *bp++ = htonl(attr->ia_size); /* new file length */
1405
1406 afs_use_fs_server(call, fc->cbi);
1407 trace_afs_make_fs_call(call, &vnode->fid);
1408 afs_set_fc_call(call, fc);
1409 afs_make_call(&fc->ac, call, GFP_NOFS);
1410 return afs_wait_for_call_to_complete(call, &fc->ac);
1411}
1412
1413/*
1414 * set the attributes on a file, using FS.StoreData if there's a change in file
1415 * size, and FS.StoreStatus otherwise
1416 */
1417int afs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr,
1418 struct afs_status_cb *scb)
1419{
1420 struct afs_vnode *vnode = fc->vnode;
1421 struct afs_call *call;
1422 struct afs_net *net = afs_v2net(vnode);
1423 __be32 *bp;
1424
1425 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
1426 return yfs_fs_setattr(fc, attr, scb);
1427
1428 if (attr->ia_valid & ATTR_SIZE)
1429 return afs_fs_setattr_size(fc, attr, scb);
1430
1431 _enter(",%x,{%llx:%llu},,",
1432 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1433
1434 call = afs_alloc_flat_call(net, &afs_RXFSStoreStatus,
1435 (4 + 6) * 4,
1436 (21 + 6) * 4);
1437 if (!call)
1438 return -ENOMEM;
1439
1440 call->key = fc->key;
1441 call->out_scb = scb;
1442
1443 /* marshall the parameters */
1444 bp = call->request;
1445 *bp++ = htonl(FSSTORESTATUS);
1446 *bp++ = htonl(vnode->fid.vid);
1447 *bp++ = htonl(vnode->fid.vnode);
1448 *bp++ = htonl(vnode->fid.unique);
1449
1450 xdr_encode_AFS_StoreStatus(&bp, attr);
1451
1452 afs_use_fs_server(call, fc->cbi);
1453 trace_afs_make_fs_call(call, &vnode->fid);
1454 afs_set_fc_call(call, fc);
1455 afs_make_call(&fc->ac, call, GFP_NOFS);
1456 return afs_wait_for_call_to_complete(call, &fc->ac);
1457}
1458
1459/*
1460 * deliver reply data to an FS.GetVolumeStatus
1461 */
1462static int afs_deliver_fs_get_volume_status(struct afs_call *call)
1463{
1464 const __be32 *bp;
1465 char *p;
1466 u32 size;
1467 int ret;
1468
1469 _enter("{%u}", call->unmarshall);
1470
1471 switch (call->unmarshall) {
1472 case 0:
1473 call->unmarshall++;
1474 afs_extract_to_buf(call, 12 * 4);
1475 /* Fall through */
1476
1477 /* extract the returned status record */
1478 case 1:
1479 _debug("extract status");
1480 ret = afs_extract_data(call, true);
1481 if (ret < 0)
1482 return ret;
1483
1484 bp = call->buffer;
1485 xdr_decode_AFSFetchVolumeStatus(&bp, call->out_volstatus);
1486 call->unmarshall++;
1487 afs_extract_to_tmp(call);
1488 /* Fall through */
1489
1490 /* extract the volume name length */
1491 case 2:
1492 ret = afs_extract_data(call, true);
1493 if (ret < 0)
1494 return ret;
1495
1496 call->count = ntohl(call->tmp);
1497 _debug("volname length: %u", call->count);
1498 if (call->count >= AFSNAMEMAX)
1499 return afs_protocol_error(call, -EBADMSG,
1500 afs_eproto_volname_len);
1501 size = (call->count + 3) & ~3; /* It's padded */
1502 afs_extract_to_buf(call, size);
1503 call->unmarshall++;
1504 /* Fall through */
1505
1506 /* extract the volume name */
1507 case 3:
1508 _debug("extract volname");
1509 ret = afs_extract_data(call, true);
1510 if (ret < 0)
1511 return ret;
1512
1513 p = call->buffer;
1514 p[call->count] = 0;
1515 _debug("volname '%s'", p);
1516 afs_extract_to_tmp(call);
1517 call->unmarshall++;
1518 /* Fall through */
1519
1520 /* extract the offline message length */
1521 case 4:
1522 ret = afs_extract_data(call, true);
1523 if (ret < 0)
1524 return ret;
1525
1526 call->count = ntohl(call->tmp);
1527 _debug("offline msg length: %u", call->count);
1528 if (call->count >= AFSNAMEMAX)
1529 return afs_protocol_error(call, -EBADMSG,
1530 afs_eproto_offline_msg_len);
1531 size = (call->count + 3) & ~3; /* It's padded */
1532 afs_extract_to_buf(call, size);
1533 call->unmarshall++;
1534 /* Fall through */
1535
1536 /* extract the offline message */
1537 case 5:
1538 _debug("extract offline");
1539 ret = afs_extract_data(call, true);
1540 if (ret < 0)
1541 return ret;
1542
1543 p = call->buffer;
1544 p[call->count] = 0;
1545 _debug("offline '%s'", p);
1546
1547 afs_extract_to_tmp(call);
1548 call->unmarshall++;
1549 /* Fall through */
1550
1551 /* extract the message of the day length */
1552 case 6:
1553 ret = afs_extract_data(call, true);
1554 if (ret < 0)
1555 return ret;
1556
1557 call->count = ntohl(call->tmp);
1558 _debug("motd length: %u", call->count);
1559 if (call->count >= AFSNAMEMAX)
1560 return afs_protocol_error(call, -EBADMSG,
1561 afs_eproto_motd_len);
1562 size = (call->count + 3) & ~3; /* It's padded */
1563 afs_extract_to_buf(call, size);
1564 call->unmarshall++;
1565 /* Fall through */
1566
1567 /* extract the message of the day */
1568 case 7:
1569 _debug("extract motd");
1570 ret = afs_extract_data(call, false);
1571 if (ret < 0)
1572 return ret;
1573
1574 p = call->buffer;
1575 p[call->count] = 0;
1576 _debug("motd '%s'", p);
1577
1578 call->unmarshall++;
1579
1580 case 8:
1581 break;
1582 }
1583
1584 _leave(" = 0 [done]");
1585 return 0;
1586}
1587
1588/*
1589 * FS.GetVolumeStatus operation type
1590 */
1591static const struct afs_call_type afs_RXFSGetVolumeStatus = {
1592 .name = "FS.GetVolumeStatus",
1593 .op = afs_FS_GetVolumeStatus,
1594 .deliver = afs_deliver_fs_get_volume_status,
1595 .destructor = afs_flat_call_destructor,
1596};
1597
1598/*
1599 * fetch the status of a volume
1600 */
1601int afs_fs_get_volume_status(struct afs_fs_cursor *fc,
1602 struct afs_volume_status *vs)
1603{
1604 struct afs_vnode *vnode = fc->vnode;
1605 struct afs_call *call;
1606 struct afs_net *net = afs_v2net(vnode);
1607 __be32 *bp;
1608
1609 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
1610 return yfs_fs_get_volume_status(fc, vs);
1611
1612 _enter("");
1613
1614 call = afs_alloc_flat_call(net, &afs_RXFSGetVolumeStatus, 2 * 4,
1615 max(12 * 4, AFSOPAQUEMAX + 1));
1616 if (!call)
1617 return -ENOMEM;
1618
1619 call->key = fc->key;
1620 call->out_volstatus = vs;
1621
1622 /* marshall the parameters */
1623 bp = call->request;
1624 bp[0] = htonl(FSGETVOLUMESTATUS);
1625 bp[1] = htonl(vnode->fid.vid);
1626
1627 afs_use_fs_server(call, fc->cbi);
1628 trace_afs_make_fs_call(call, &vnode->fid);
1629 afs_set_fc_call(call, fc);
1630 afs_make_call(&fc->ac, call, GFP_NOFS);
1631 return afs_wait_for_call_to_complete(call, &fc->ac);
1632}
1633
1634/*
1635 * deliver reply data to an FS.SetLock, FS.ExtendLock or FS.ReleaseLock
1636 */
1637static int afs_deliver_fs_xxxx_lock(struct afs_call *call)
1638{
1639 const __be32 *bp;
1640 int ret;
1641
1642 _enter("{%u}", call->unmarshall);
1643
1644 ret = afs_transfer_reply(call);
1645 if (ret < 0)
1646 return ret;
1647
1648 /* unmarshall the reply once we've received all of it */
1649 bp = call->buffer;
1650 xdr_decode_AFSVolSync(&bp, call->out_volsync);
1651
1652 _leave(" = 0 [done]");
1653 return 0;
1654}
1655
1656/*
1657 * FS.SetLock operation type
1658 */
1659static const struct afs_call_type afs_RXFSSetLock = {
1660 .name = "FS.SetLock",
1661 .op = afs_FS_SetLock,
1662 .deliver = afs_deliver_fs_xxxx_lock,
1663 .done = afs_lock_op_done,
1664 .destructor = afs_flat_call_destructor,
1665};
1666
1667/*
1668 * FS.ExtendLock operation type
1669 */
1670static const struct afs_call_type afs_RXFSExtendLock = {
1671 .name = "FS.ExtendLock",
1672 .op = afs_FS_ExtendLock,
1673 .deliver = afs_deliver_fs_xxxx_lock,
1674 .done = afs_lock_op_done,
1675 .destructor = afs_flat_call_destructor,
1676};
1677
1678/*
1679 * FS.ReleaseLock operation type
1680 */
1681static const struct afs_call_type afs_RXFSReleaseLock = {
1682 .name = "FS.ReleaseLock",
1683 .op = afs_FS_ReleaseLock,
1684 .deliver = afs_deliver_fs_xxxx_lock,
1685 .destructor = afs_flat_call_destructor,
1686};
1687
1688/*
1689 * Set a lock on a file
1690 */
1691int afs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type,
1692 struct afs_status_cb *scb)
1693{
1694 struct afs_vnode *vnode = fc->vnode;
1695 struct afs_call *call;
1696 struct afs_net *net = afs_v2net(vnode);
1697 __be32 *bp;
1698
1699 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
1700 return yfs_fs_set_lock(fc, type, scb);
1701
1702 _enter("");
1703
1704 call = afs_alloc_flat_call(net, &afs_RXFSSetLock, 5 * 4, 6 * 4);
1705 if (!call)
1706 return -ENOMEM;
1707
1708 call->key = fc->key;
1709 call->lvnode = vnode;
1710 call->out_scb = scb;
1711
1712 /* marshall the parameters */
1713 bp = call->request;
1714 *bp++ = htonl(FSSETLOCK);
1715 *bp++ = htonl(vnode->fid.vid);
1716 *bp++ = htonl(vnode->fid.vnode);
1717 *bp++ = htonl(vnode->fid.unique);
1718 *bp++ = htonl(type);
1719
1720 afs_use_fs_server(call, fc->cbi);
1721 trace_afs_make_fs_calli(call, &vnode->fid, type);
1722 afs_set_fc_call(call, fc);
1723 afs_make_call(&fc->ac, call, GFP_NOFS);
1724 return afs_wait_for_call_to_complete(call, &fc->ac);
1725}
1726
1727/*
1728 * extend a lock on a file
1729 */
1730int afs_fs_extend_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb)
1731{
1732 struct afs_vnode *vnode = fc->vnode;
1733 struct afs_call *call;
1734 struct afs_net *net = afs_v2net(vnode);
1735 __be32 *bp;
1736
1737 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
1738 return yfs_fs_extend_lock(fc, scb);
1739
1740 _enter("");
1741
1742 call = afs_alloc_flat_call(net, &afs_RXFSExtendLock, 4 * 4, 6 * 4);
1743 if (!call)
1744 return -ENOMEM;
1745
1746 call->key = fc->key;
1747 call->lvnode = vnode;
1748 call->out_scb = scb;
1749
1750 /* marshall the parameters */
1751 bp = call->request;
1752 *bp++ = htonl(FSEXTENDLOCK);
1753 *bp++ = htonl(vnode->fid.vid);
1754 *bp++ = htonl(vnode->fid.vnode);
1755 *bp++ = htonl(vnode->fid.unique);
1756
1757 afs_use_fs_server(call, fc->cbi);
1758 trace_afs_make_fs_call(call, &vnode->fid);
1759 afs_set_fc_call(call, fc);
1760 afs_make_call(&fc->ac, call, GFP_NOFS);
1761 return afs_wait_for_call_to_complete(call, &fc->ac);
1762}
1763
1764/*
1765 * release a lock on a file
1766 */
1767int afs_fs_release_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb)
1768{
1769 struct afs_vnode *vnode = fc->vnode;
1770 struct afs_call *call;
1771 struct afs_net *net = afs_v2net(vnode);
1772 __be32 *bp;
1773
1774 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
1775 return yfs_fs_release_lock(fc, scb);
1776
1777 _enter("");
1778
1779 call = afs_alloc_flat_call(net, &afs_RXFSReleaseLock, 4 * 4, 6 * 4);
1780 if (!call)
1781 return -ENOMEM;
1782
1783 call->key = fc->key;
1784 call->lvnode = vnode;
1785 call->out_scb = scb;
1786
1787 /* marshall the parameters */
1788 bp = call->request;
1789 *bp++ = htonl(FSRELEASELOCK);
1790 *bp++ = htonl(vnode->fid.vid);
1791 *bp++ = htonl(vnode->fid.vnode);
1792 *bp++ = htonl(vnode->fid.unique);
1793
1794 afs_use_fs_server(call, fc->cbi);
1795 trace_afs_make_fs_call(call, &vnode->fid);
1796 afs_set_fc_call(call, fc);
1797 afs_make_call(&fc->ac, call, GFP_NOFS);
1798 return afs_wait_for_call_to_complete(call, &fc->ac);
1799}
1800
1801/*
1802 * Deliver reply data to an FS.GiveUpAllCallBacks operation.
1803 */
1804static int afs_deliver_fs_give_up_all_callbacks(struct afs_call *call)
1805{
1806 return afs_transfer_reply(call);
1807}
1808
1809/*
1810 * FS.GiveUpAllCallBacks operation type
1811 */
1812static const struct afs_call_type afs_RXFSGiveUpAllCallBacks = {
1813 .name = "FS.GiveUpAllCallBacks",
1814 .op = afs_FS_GiveUpAllCallBacks,
1815 .deliver = afs_deliver_fs_give_up_all_callbacks,
1816 .destructor = afs_flat_call_destructor,
1817};
1818
1819/*
1820 * Flush all the callbacks we have on a server.
1821 */
1822int afs_fs_give_up_all_callbacks(struct afs_net *net,
1823 struct afs_server *server,
1824 struct afs_addr_cursor *ac,
1825 struct key *key)
1826{
1827 struct afs_call *call;
1828 __be32 *bp;
1829
1830 _enter("");
1831
1832 call = afs_alloc_flat_call(net, &afs_RXFSGiveUpAllCallBacks, 1 * 4, 0);
1833 if (!call)
1834 return -ENOMEM;
1835
1836 call->key = key;
1837
1838 /* marshall the parameters */
1839 bp = call->request;
1840 *bp++ = htonl(FSGIVEUPALLCALLBACKS);
1841
1842 /* Can't take a ref on server */
1843 afs_make_call(ac, call, GFP_NOFS);
1844 return afs_wait_for_call_to_complete(call, ac);
1845}
1846
1847/*
1848 * Deliver reply data to an FS.GetCapabilities operation.
1849 */
1850static int afs_deliver_fs_get_capabilities(struct afs_call *call)
1851{
1852 u32 count;
1853 int ret;
1854
1855 _enter("{%u,%zu}", call->unmarshall, iov_iter_count(&call->iter));
1856
1857 switch (call->unmarshall) {
1858 case 0:
1859 afs_extract_to_tmp(call);
1860 call->unmarshall++;
1861 /* Fall through */
1862
1863 /* Extract the capabilities word count */
1864 case 1:
1865 ret = afs_extract_data(call, true);
1866 if (ret < 0)
1867 return ret;
1868
1869 count = ntohl(call->tmp);
1870
1871 call->count = count;
1872 call->count2 = count;
1873 afs_extract_discard(call, count * sizeof(__be32));
1874 call->unmarshall++;
1875 /* Fall through */
1876
1877 /* Extract capabilities words */
1878 case 2:
1879 ret = afs_extract_data(call, false);
1880 if (ret < 0)
1881 return ret;
1882
1883 /* TODO: Examine capabilities */
1884
1885 call->unmarshall++;
1886 break;
1887 }
1888
1889 _leave(" = 0 [done]");
1890 return 0;
1891}
1892
1893/*
1894 * FS.GetCapabilities operation type
1895 */
1896static const struct afs_call_type afs_RXFSGetCapabilities = {
1897 .name = "FS.GetCapabilities",
1898 .op = afs_FS_GetCapabilities,
1899 .deliver = afs_deliver_fs_get_capabilities,
1900 .done = afs_fileserver_probe_result,
1901 .destructor = afs_flat_call_destructor,
1902};
1903
1904/*
1905 * Probe a fileserver for the capabilities that it supports. This can
1906 * return up to 196 words.
1907 */
1908struct afs_call *afs_fs_get_capabilities(struct afs_net *net,
1909 struct afs_server *server,
1910 struct afs_addr_cursor *ac,
1911 struct key *key,
1912 unsigned int server_index)
1913{
1914 struct afs_call *call;
1915 __be32 *bp;
1916
1917 _enter("");
1918
1919 call = afs_alloc_flat_call(net, &afs_RXFSGetCapabilities, 1 * 4, 16 * 4);
1920 if (!call)
1921 return ERR_PTR(-ENOMEM);
1922
1923 call->key = key;
1924 call->server = afs_get_server(server, afs_server_trace_get_caps);
1925 call->server_index = server_index;
1926 call->upgrade = true;
1927 call->async = true;
1928 call->max_lifespan = AFS_PROBE_MAX_LIFESPAN;
1929
1930 /* marshall the parameters */
1931 bp = call->request;
1932 *bp++ = htonl(FSGETCAPABILITIES);
1933
1934 /* Can't take a ref on server */
1935 trace_afs_make_fs_call(call, NULL);
1936 afs_make_call(ac, call, GFP_NOFS);
1937 return call;
1938}
1939
1940/*
1941 * Deliver reply data to an FS.FetchStatus with no vnode.
1942 */
1943static int afs_deliver_fs_fetch_status(struct afs_call *call)
1944{
1945 const __be32 *bp;
1946 int ret;
1947
1948 ret = afs_transfer_reply(call);
1949 if (ret < 0)
1950 return ret;
1951
1952 /* unmarshall the reply once we've received all of it */
1953 bp = call->buffer;
1954 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
1955 if (ret < 0)
1956 return ret;
1957 xdr_decode_AFSCallBack(&bp, call, call->out_scb);
1958 xdr_decode_AFSVolSync(&bp, call->out_volsync);
1959
1960 _leave(" = 0 [done]");
1961 return 0;
1962}
1963
1964/*
1965 * FS.FetchStatus operation type
1966 */
1967static const struct afs_call_type afs_RXFSFetchStatus = {
1968 .name = "FS.FetchStatus",
1969 .op = afs_FS_FetchStatus,
1970 .deliver = afs_deliver_fs_fetch_status,
1971 .destructor = afs_flat_call_destructor,
1972};
1973
1974/*
1975 * Fetch the status information for a fid without needing a vnode handle.
1976 */
1977int afs_fs_fetch_status(struct afs_fs_cursor *fc,
1978 struct afs_net *net,
1979 struct afs_fid *fid,
1980 struct afs_status_cb *scb,
1981 struct afs_volsync *volsync)
1982{
1983 struct afs_call *call;
1984 __be32 *bp;
1985
1986 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
1987 return yfs_fs_fetch_status(fc, net, fid, scb, volsync);
1988
1989 _enter(",%x,{%llx:%llu},,",
1990 key_serial(fc->key), fid->vid, fid->vnode);
1991
1992 call = afs_alloc_flat_call(net, &afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4);
1993 if (!call) {
1994 fc->ac.error = -ENOMEM;
1995 return -ENOMEM;
1996 }
1997
1998 call->key = fc->key;
1999 call->out_fid = fid;
2000 call->out_scb = scb;
2001 call->out_volsync = volsync;
2002
2003 /* marshall the parameters */
2004 bp = call->request;
2005 bp[0] = htonl(FSFETCHSTATUS);
2006 bp[1] = htonl(fid->vid);
2007 bp[2] = htonl(fid->vnode);
2008 bp[3] = htonl(fid->unique);
2009
2010 afs_use_fs_server(call, fc->cbi);
2011 trace_afs_make_fs_call(call, fid);
2012 afs_set_fc_call(call, fc);
2013 afs_make_call(&fc->ac, call, GFP_NOFS);
2014 return afs_wait_for_call_to_complete(call, &fc->ac);
2015}
2016
2017/*
2018 * Deliver reply data to an FS.InlineBulkStatus call
2019 */
2020static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
2021{
2022 struct afs_status_cb *scb;
2023 const __be32 *bp;
2024 u32 tmp;
2025 int ret;
2026
2027 _enter("{%u}", call->unmarshall);
2028
2029 switch (call->unmarshall) {
2030 case 0:
2031 afs_extract_to_tmp(call);
2032 call->unmarshall++;
2033 /* Fall through */
2034
2035 /* Extract the file status count and array in two steps */
2036 case 1:
2037 _debug("extract status count");
2038 ret = afs_extract_data(call, true);
2039 if (ret < 0)
2040 return ret;
2041
2042 tmp = ntohl(call->tmp);
2043 _debug("status count: %u/%u", tmp, call->count2);
2044 if (tmp != call->count2)
2045 return afs_protocol_error(call, -EBADMSG,
2046 afs_eproto_ibulkst_count);
2047
2048 call->count = 0;
2049 call->unmarshall++;
2050 more_counts:
2051 afs_extract_to_buf(call, 21 * sizeof(__be32));
2052 /* Fall through */
2053
2054 case 2:
2055 _debug("extract status array %u", call->count);
2056 ret = afs_extract_data(call, true);
2057 if (ret < 0)
2058 return ret;
2059
2060 bp = call->buffer;
2061 scb = &call->out_scb[call->count];
2062 ret = xdr_decode_AFSFetchStatus(&bp, call, scb);
2063 if (ret < 0)
2064 return ret;
2065
2066 call->count++;
2067 if (call->count < call->count2)
2068 goto more_counts;
2069
2070 call->count = 0;
2071 call->unmarshall++;
2072 afs_extract_to_tmp(call);
2073 /* Fall through */
2074
2075 /* Extract the callback count and array in two steps */
2076 case 3:
2077 _debug("extract CB count");
2078 ret = afs_extract_data(call, true);
2079 if (ret < 0)
2080 return ret;
2081
2082 tmp = ntohl(call->tmp);
2083 _debug("CB count: %u", tmp);
2084 if (tmp != call->count2)
2085 return afs_protocol_error(call, -EBADMSG,
2086 afs_eproto_ibulkst_cb_count);
2087 call->count = 0;
2088 call->unmarshall++;
2089 more_cbs:
2090 afs_extract_to_buf(call, 3 * sizeof(__be32));
2091 /* Fall through */
2092
2093 case 4:
2094 _debug("extract CB array");
2095 ret = afs_extract_data(call, true);
2096 if (ret < 0)
2097 return ret;
2098
2099 _debug("unmarshall CB array");
2100 bp = call->buffer;
2101 scb = &call->out_scb[call->count];
2102 xdr_decode_AFSCallBack(&bp, call, scb);
2103 call->count++;
2104 if (call->count < call->count2)
2105 goto more_cbs;
2106
2107 afs_extract_to_buf(call, 6 * sizeof(__be32));
2108 call->unmarshall++;
2109 /* Fall through */
2110
2111 case 5:
2112 ret = afs_extract_data(call, false);
2113 if (ret < 0)
2114 return ret;
2115
2116 bp = call->buffer;
2117 xdr_decode_AFSVolSync(&bp, call->out_volsync);
2118
2119 call->unmarshall++;
2120
2121 case 6:
2122 break;
2123 }
2124
2125 _leave(" = 0 [done]");
2126 return 0;
2127}
2128
2129/*
2130 * FS.InlineBulkStatus operation type
2131 */
2132static const struct afs_call_type afs_RXFSInlineBulkStatus = {
2133 .name = "FS.InlineBulkStatus",
2134 .op = afs_FS_InlineBulkStatus,
2135 .deliver = afs_deliver_fs_inline_bulk_status,
2136 .destructor = afs_flat_call_destructor,
2137};
2138
2139/*
2140 * Fetch the status information for up to 50 files
2141 */
2142int afs_fs_inline_bulk_status(struct afs_fs_cursor *fc,
2143 struct afs_net *net,
2144 struct afs_fid *fids,
2145 struct afs_status_cb *statuses,
2146 unsigned int nr_fids,
2147 struct afs_volsync *volsync)
2148{
2149 struct afs_call *call;
2150 __be32 *bp;
2151 int i;
2152
2153 if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
2154 return yfs_fs_inline_bulk_status(fc, net, fids, statuses,
2155 nr_fids, volsync);
2156
2157 _enter(",%x,{%llx:%llu},%u",
2158 key_serial(fc->key), fids[0].vid, fids[1].vnode, nr_fids);
2159
2160 call = afs_alloc_flat_call(net, &afs_RXFSInlineBulkStatus,
2161 (2 + nr_fids * 3) * 4,
2162 21 * 4);
2163 if (!call) {
2164 fc->ac.error = -ENOMEM;
2165 return -ENOMEM;
2166 }
2167
2168 call->key = fc->key;
2169 call->out_scb = statuses;
2170 call->out_volsync = volsync;
2171 call->count2 = nr_fids;
2172
2173 /* marshall the parameters */
2174 bp = call->request;
2175 *bp++ = htonl(FSINLINEBULKSTATUS);
2176 *bp++ = htonl(nr_fids);
2177 for (i = 0; i < nr_fids; i++) {
2178 *bp++ = htonl(fids[i].vid);
2179 *bp++ = htonl(fids[i].vnode);
2180 *bp++ = htonl(fids[i].unique);
2181 }
2182
2183 afs_use_fs_server(call, fc->cbi);
2184 trace_afs_make_fs_call(call, &fids[0]);
2185 afs_set_fc_call(call, fc);
2186 afs_make_call(&fc->ac, call, GFP_NOFS);
2187 return afs_wait_for_call_to_complete(call, &fc->ac);
2188}
2189
2190/*
2191 * deliver reply data to an FS.FetchACL
2192 */
2193static int afs_deliver_fs_fetch_acl(struct afs_call *call)
2194{
2195 struct afs_acl *acl;
2196 const __be32 *bp;
2197 unsigned int size;
2198 int ret;
2199
2200 _enter("{%u}", call->unmarshall);
2201
2202 switch (call->unmarshall) {
2203 case 0:
2204 afs_extract_to_tmp(call);
2205 call->unmarshall++;
2206 /* Fall through */
2207
2208 /* extract the returned data length */
2209 case 1:
2210 ret = afs_extract_data(call, true);
2211 if (ret < 0)
2212 return ret;
2213
2214 size = call->count2 = ntohl(call->tmp);
2215 size = round_up(size, 4);
2216
2217 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
2218 if (!acl)
2219 return -ENOMEM;
2220 call->ret_acl = acl;
2221 acl->size = call->count2;
2222 afs_extract_begin(call, acl->data, size);
2223 call->unmarshall++;
2224 /* Fall through */
2225
2226 /* extract the returned data */
2227 case 2:
2228 ret = afs_extract_data(call, true);
2229 if (ret < 0)
2230 return ret;
2231
2232 afs_extract_to_buf(call, (21 + 6) * 4);
2233 call->unmarshall++;
2234 /* Fall through */
2235
2236 /* extract the metadata */
2237 case 3:
2238 ret = afs_extract_data(call, false);
2239 if (ret < 0)
2240 return ret;
2241
2242 bp = call->buffer;
2243 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
2244 if (ret < 0)
2245 return ret;
2246 xdr_decode_AFSVolSync(&bp, call->out_volsync);
2247
2248 call->unmarshall++;
2249
2250 case 4:
2251 break;
2252 }
2253
2254 _leave(" = 0 [done]");
2255 return 0;
2256}
2257
2258static void afs_destroy_fs_fetch_acl(struct afs_call *call)
2259{
2260 kfree(call->ret_acl);
2261 afs_flat_call_destructor(call);
2262}
2263
2264/*
2265 * FS.FetchACL operation type
2266 */
2267static const struct afs_call_type afs_RXFSFetchACL = {
2268 .name = "FS.FetchACL",
2269 .op = afs_FS_FetchACL,
2270 .deliver = afs_deliver_fs_fetch_acl,
2271 .destructor = afs_destroy_fs_fetch_acl,
2272};
2273
2274/*
2275 * Fetch the ACL for a file.
2276 */
2277struct afs_acl *afs_fs_fetch_acl(struct afs_fs_cursor *fc,
2278 struct afs_status_cb *scb)
2279{
2280 struct afs_vnode *vnode = fc->vnode;
2281 struct afs_call *call;
2282 struct afs_net *net = afs_v2net(vnode);
2283 __be32 *bp;
2284
2285 _enter(",%x,{%llx:%llu},,",
2286 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
2287
2288 call = afs_alloc_flat_call(net, &afs_RXFSFetchACL, 16, (21 + 6) * 4);
2289 if (!call) {
2290 fc->ac.error = -ENOMEM;
2291 return ERR_PTR(-ENOMEM);
2292 }
2293
2294 call->key = fc->key;
2295 call->ret_acl = NULL;
2296 call->out_scb = scb;
2297 call->out_volsync = NULL;
2298
2299 /* marshall the parameters */
2300 bp = call->request;
2301 bp[0] = htonl(FSFETCHACL);
2302 bp[1] = htonl(vnode->fid.vid);
2303 bp[2] = htonl(vnode->fid.vnode);
2304 bp[3] = htonl(vnode->fid.unique);
2305
2306 afs_use_fs_server(call, fc->cbi);
2307 trace_afs_make_fs_call(call, &vnode->fid);
2308 afs_make_call(&fc->ac, call, GFP_KERNEL);
2309 return (struct afs_acl *)afs_wait_for_call_to_complete(call, &fc->ac);
2310}
2311
2312/*
2313 * Deliver reply data to any operation that returns file status and volume
2314 * sync.
2315 */
2316static int afs_deliver_fs_file_status_and_vol(struct afs_call *call)
2317{
2318 const __be32 *bp;
2319 int ret;
2320
2321 ret = afs_transfer_reply(call);
2322 if (ret < 0)
2323 return ret;
2324
2325 bp = call->buffer;
2326 ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
2327 if (ret < 0)
2328 return ret;
2329 xdr_decode_AFSVolSync(&bp, call->out_volsync);
2330
2331 _leave(" = 0 [done]");
2332 return 0;
2333}
2334
2335/*
2336 * FS.StoreACL operation type
2337 */
2338static const struct afs_call_type afs_RXFSStoreACL = {
2339 .name = "FS.StoreACL",
2340 .op = afs_FS_StoreACL,
2341 .deliver = afs_deliver_fs_file_status_and_vol,
2342 .destructor = afs_flat_call_destructor,
2343};
2344
2345/*
2346 * Fetch the ACL for a file.
2347 */
2348int afs_fs_store_acl(struct afs_fs_cursor *fc, const struct afs_acl *acl,
2349 struct afs_status_cb *scb)
2350{
2351 struct afs_vnode *vnode = fc->vnode;
2352 struct afs_call *call;
2353 struct afs_net *net = afs_v2net(vnode);
2354 size_t size;
2355 __be32 *bp;
2356
2357 _enter(",%x,{%llx:%llu},,",
2358 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
2359
2360 size = round_up(acl->size, 4);
2361 call = afs_alloc_flat_call(net, &afs_RXFSStoreACL,
2362 5 * 4 + size, (21 + 6) * 4);
2363 if (!call) {
2364 fc->ac.error = -ENOMEM;
2365 return -ENOMEM;
2366 }
2367
2368 call->key = fc->key;
2369 call->out_scb = scb;
2370 call->out_volsync = NULL;
2371
2372 /* marshall the parameters */
2373 bp = call->request;
2374 bp[0] = htonl(FSSTOREACL);
2375 bp[1] = htonl(vnode->fid.vid);
2376 bp[2] = htonl(vnode->fid.vnode);
2377 bp[3] = htonl(vnode->fid.unique);
2378 bp[4] = htonl(acl->size);
2379 memcpy(&bp[5], acl->data, acl->size);
2380 if (acl->size != size)
2381 memset((void *)&bp[5] + acl->size, 0, size - acl->size);
2382
2383 trace_afs_make_fs_call(call, &vnode->fid);
2384 afs_make_call(&fc->ac, call, GFP_KERNEL);
2385 return afs_wait_for_call_to_complete(call, &fc->ac);
2386}