?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
fix a series of Documentation/ broken file name references
[linux-2.6/btrfs-unstable.git] / fs / afs / fsclient.c
blob5907601aafd09761fffea80401470ad3948b8328
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 <linux/iversion.h>
17 #include "internal.h"
18 #include "afs_fs.h"
19 #include "xdr_fs.h"
20
21 static const struct afs_fid afs_zero_fid;
22
23 /*
24 * We need somewhere to discard into in case the server helpfully returns more
25 * than we asked for in FS.FetchData{,64}.
26 */
27 static u8 afs_discard_buffer[64];
28
29 static inline void afs_use_fs_server(struct afs_call *call, struct afs_cb_interest *cbi)
30 {
31 call->cbi = afs_get_cb_interest(cbi);
32 }
33
34 /*
35 * decode an AFSFid block
36 */
37 static void xdr_decode_AFSFid(const __be32 **_bp, struct afs_fid *fid)
38 {
39 const __be32 *bp = *_bp;
40
41 fid->vid = ntohl(*bp++);
42 fid->vnode = ntohl(*bp++);
43 fid->unique = ntohl(*bp++);
44 *_bp = bp;
45 }
46
47 /*
48 * Dump a bad file status record.
49 */
50 static void xdr_dump_bad(const __be32 *bp)
51 {
52 __be32 x[4];
53 int i;
54
55 pr_notice("AFS XDR: Bad status record\n");
56 for (i = 0; i < 5 * 4 * 4; i += 16) {
57 memcpy(x, bp, 16);
58 bp += 4;
59 pr_notice("%03x: %08x %08x %08x %08x\n",
60 i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
61 }
62
63 memcpy(x, bp, 4);
64 pr_notice("0x50: %08x\n", ntohl(x[0]));
65 }
66
67 /*
68 * Update the core inode struct from a returned status record.
69 */
70 void afs_update_inode_from_status(struct afs_vnode *vnode,
71 struct afs_file_status *status,
72 const afs_dataversion_t *expected_version,
73 u8 flags)
74 {
75 struct timespec64 t;
76 umode_t mode;
77
78 t.tv_sec = status->mtime_client;
79 t.tv_nsec = 0;
80 vnode->vfs_inode.i_ctime = t;
81 vnode->vfs_inode.i_mtime = t;
82 vnode->vfs_inode.i_atime = t;
83
84 if (flags & (AFS_VNODE_META_CHANGED | AFS_VNODE_NOT_YET_SET)) {
85 vnode->vfs_inode.i_uid = make_kuid(&init_user_ns, status->owner);
86 vnode->vfs_inode.i_gid = make_kgid(&init_user_ns, status->group);
87 set_nlink(&vnode->vfs_inode, status->nlink);
88
89 mode = vnode->vfs_inode.i_mode;
90 mode &= ~S_IALLUGO;
91 mode |= status->mode;
92 barrier();
93 vnode->vfs_inode.i_mode = mode;
94 }
95
96 if (!(flags & AFS_VNODE_NOT_YET_SET)) {
97 if (expected_version &&
98 *expected_version != status->data_version) {
99 _debug("vnode modified %llx on {%x:%u} [exp %llx]",
100 (unsigned long long) status->data_version,
101 vnode->fid.vid, vnode->fid.vnode,
102 (unsigned long long) *expected_version);
103 vnode->invalid_before = status->data_version;
104 if (vnode->status.type == AFS_FTYPE_DIR) {
105 if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &vnode->flags))
106 afs_stat_v(vnode, n_inval);
107 } else {
108 set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags);
109 }
110 } else if (vnode->status.type == AFS_FTYPE_DIR) {
111 /* Expected directory change is handled elsewhere so
112 * that we can locally edit the directory and save on a
113 * download.
114 */
115 if (test_bit(AFS_VNODE_DIR_VALID, &vnode->flags))
116 flags &= ~AFS_VNODE_DATA_CHANGED;
117 }
118 }
119
120 if (flags & (AFS_VNODE_DATA_CHANGED | AFS_VNODE_NOT_YET_SET)) {
121 inode_set_iversion_raw(&vnode->vfs_inode, status->data_version);
122 i_size_write(&vnode->vfs_inode, status->size);
123 }
124 }
125
126 /*
127 * decode an AFSFetchStatus block
128 */
129 static int xdr_decode_AFSFetchStatus(struct afs_call *call,
130 const __be32 **_bp,
131 struct afs_file_status *status,
132 struct afs_vnode *vnode,
133 const afs_dataversion_t *expected_version,
134 struct afs_read *read_req)
135 {
136 const struct afs_xdr_AFSFetchStatus *xdr = (const void *)*_bp;
137 bool inline_error = (call->operation_ID == afs_FS_InlineBulkStatus);
138 u64 data_version, size;
139 u32 type, abort_code;
140 u8 flags = 0;
141 int ret;
142
143 if (vnode)
144 write_seqlock(&vnode->cb_lock);
145
146 abort_code = ntohl(xdr->abort_code);
147
148 if (xdr->if_version != htonl(AFS_FSTATUS_VERSION)) {
149 if (xdr->if_version == htonl(0) &&
150 abort_code != 0 &&
151 inline_error) {
152 /* The OpenAFS fileserver has a bug in FS.InlineBulkStatus
153 * whereby it doesn't set the interface version in the error
154 * case.
155 */
156 status->abort_code = abort_code;
157 ret = 0;
158 goto out;
159 }
160
161 pr_warn("Unknown AFSFetchStatus version %u\n", ntohl(xdr->if_version));
162 goto bad;
163 }
164
165 if (abort_code != 0 && inline_error) {
166 status->abort_code = abort_code;
167 ret = 0;
168 goto out;
169 }
170
171 type = ntohl(xdr->type);
172 switch (type) {
173 case AFS_FTYPE_FILE:
174 case AFS_FTYPE_DIR:
175 case AFS_FTYPE_SYMLINK:
176 if (type != status->type &&
177 vnode &&
178 !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
179 pr_warning("Vnode %x:%x:%x changed type %u to %u\n",
180 vnode->fid.vid,
181 vnode->fid.vnode,
182 vnode->fid.unique,
183 status->type, type);
184 goto bad;
185 }
186 status->type = type;
187 break;
188 default:
189 goto bad;
190 }
191
192 #define EXTRACT_M(FIELD) \
193 do { \
194 u32 x = ntohl(xdr->FIELD); \
195 if (status->FIELD != x) { \
196 flags |= AFS_VNODE_META_CHANGED; \
197 status->FIELD = x; \
198 } \
199 } while (0)
200
201 EXTRACT_M(nlink);
202 EXTRACT_M(author);
203 EXTRACT_M(owner);
204 EXTRACT_M(caller_access); /* call ticket dependent */
205 EXTRACT_M(anon_access);
206 EXTRACT_M(mode);
207 EXTRACT_M(group);
208
209 status->mtime_client = ntohl(xdr->mtime_client);
210 status->mtime_server = ntohl(xdr->mtime_server);
211 status->lock_count = ntohl(xdr->lock_count);
212
213 size = (u64)ntohl(xdr->size_lo);
214 size |= (u64)ntohl(xdr->size_hi) << 32;
215 status->size = size;
216
217 data_version = (u64)ntohl(xdr->data_version_lo);
218 data_version |= (u64)ntohl(xdr->data_version_hi) << 32;
219 if (data_version != status->data_version) {
220 status->data_version = data_version;
221 flags |= AFS_VNODE_DATA_CHANGED;
222 }
223
224 if (read_req) {
225 read_req->data_version = data_version;
226 read_req->file_size = size;
227 }
228
229 *_bp = (const void *)*_bp + sizeof(*xdr);
230
231 if (vnode) {
232 if (test_bit(AFS_VNODE_UNSET, &vnode->flags))
233 flags |= AFS_VNODE_NOT_YET_SET;
234 afs_update_inode_from_status(vnode, status, expected_version,
235 flags);
236 }
237
238 ret = 0;
239
240 out:
241 if (vnode)
242 write_sequnlock(&vnode->cb_lock);
243 return ret;
244
245 bad:
246 xdr_dump_bad(*_bp);
247 ret = afs_protocol_error(call, -EBADMSG);
248 goto out;
249 }
250
251 /*
252 * decode an AFSCallBack block
253 */
254 static void xdr_decode_AFSCallBack(struct afs_call *call,
255 struct afs_vnode *vnode,
256 const __be32 **_bp)
257 {
258 struct afs_cb_interest *old, *cbi = call->cbi;
259 const __be32 *bp = *_bp;
260 u32 cb_expiry;
261
262 write_seqlock(&vnode->cb_lock);
263
264 if (call->cb_break == afs_cb_break_sum(vnode, cbi)) {
265 vnode->cb_version = ntohl(*bp++);
266 cb_expiry = ntohl(*bp++);
267 vnode->cb_type = ntohl(*bp++);
268 vnode->cb_expires_at = cb_expiry + ktime_get_real_seconds();
269 old = vnode->cb_interest;
270 if (old != call->cbi) {
271 vnode->cb_interest = cbi;
272 cbi = old;
273 }
274 set_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
275 } else {
276 bp += 3;
277 }
278
279 write_sequnlock(&vnode->cb_lock);
280 call->cbi = cbi;
281 *_bp = bp;
282 }
283
284 static void xdr_decode_AFSCallBack_raw(const __be32 **_bp,
285 struct afs_callback *cb)
286 {
287 const __be32 *bp = *_bp;
288
289 cb->version = ntohl(*bp++);
290 cb->expiry = ntohl(*bp++);
291 cb->type = ntohl(*bp++);
292 *_bp = bp;
293 }
294
295 /*
296 * decode an AFSVolSync block
297 */
298 static void xdr_decode_AFSVolSync(const __be32 **_bp,
299 struct afs_volsync *volsync)
300 {
301 const __be32 *bp = *_bp;
302
303 volsync->creation = ntohl(*bp++);
304 bp++; /* spare2 */
305 bp++; /* spare3 */
306 bp++; /* spare4 */
307 bp++; /* spare5 */
308 bp++; /* spare6 */
309 *_bp = bp;
310 }
311
312 /*
313 * encode the requested attributes into an AFSStoreStatus block
314 */
315 static void xdr_encode_AFS_StoreStatus(__be32 **_bp, struct iattr *attr)
316 {
317 __be32 *bp = *_bp;
318 u32 mask = 0, mtime = 0, owner = 0, group = 0, mode = 0;
319
320 mask = 0;
321 if (attr->ia_valid & ATTR_MTIME) {
322 mask |= AFS_SET_MTIME;
323 mtime = attr->ia_mtime.tv_sec;
324 }
325
326 if (attr->ia_valid & ATTR_UID) {
327 mask |= AFS_SET_OWNER;
328 owner = from_kuid(&init_user_ns, attr->ia_uid);
329 }
330
331 if (attr->ia_valid & ATTR_GID) {
332 mask |= AFS_SET_GROUP;
333 group = from_kgid(&init_user_ns, attr->ia_gid);
334 }
335
336 if (attr->ia_valid & ATTR_MODE) {
337 mask |= AFS_SET_MODE;
338 mode = attr->ia_mode & S_IALLUGO;
339 }
340
341 *bp++ = htonl(mask);
342 *bp++ = htonl(mtime);
343 *bp++ = htonl(owner);
344 *bp++ = htonl(group);
345 *bp++ = htonl(mode);
346 *bp++ = 0; /* segment size */
347 *_bp = bp;
348 }
349
350 /*
351 * decode an AFSFetchVolumeStatus block
352 */
353 static void xdr_decode_AFSFetchVolumeStatus(const __be32 **_bp,
354 struct afs_volume_status *vs)
355 {
356 const __be32 *bp = *_bp;
357
358 vs->vid = ntohl(*bp++);
359 vs->parent_id = ntohl(*bp++);
360 vs->online = ntohl(*bp++);
361 vs->in_service = ntohl(*bp++);
362 vs->blessed = ntohl(*bp++);
363 vs->needs_salvage = ntohl(*bp++);
364 vs->type = ntohl(*bp++);
365 vs->min_quota = ntohl(*bp++);
366 vs->max_quota = ntohl(*bp++);
367 vs->blocks_in_use = ntohl(*bp++);
368 vs->part_blocks_avail = ntohl(*bp++);
369 vs->part_max_blocks = ntohl(*bp++);
370 *_bp = bp;
371 }
372
373 /*
374 * deliver reply data to an FS.FetchStatus
375 */
376 static int afs_deliver_fs_fetch_status_vnode(struct afs_call *call)
377 {
378 struct afs_vnode *vnode = call->reply[0];
379 const __be32 *bp;
380 int ret;
381
382 ret = afs_transfer_reply(call);
383 if (ret < 0)
384 return ret;
385
386 _enter("{%x:%u}", vnode->fid.vid, vnode->fid.vnode);
387
388 /* unmarshall the reply once we've received all of it */
389 bp = call->buffer;
390 if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
391 &call->expected_version, NULL) < 0)
392 return afs_protocol_error(call, -EBADMSG);
393 xdr_decode_AFSCallBack(call, vnode, &bp);
394 if (call->reply[1])
395 xdr_decode_AFSVolSync(&bp, call->reply[1]);
396
397 _leave(" = 0 [done]");
398 return 0;
399 }
400
401 /*
402 * FS.FetchStatus operation type
403 */
404 static const struct afs_call_type afs_RXFSFetchStatus_vnode = {
405 .name = "FS.FetchStatus(vnode)",
406 .op = afs_FS_FetchStatus,
407 .deliver = afs_deliver_fs_fetch_status_vnode,
408 .destructor = afs_flat_call_destructor,
409 };
410
411 /*
412 * fetch the status information for a file
413 */
414 int afs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_volsync *volsync,
415 bool new_inode)
416 {
417 struct afs_vnode *vnode = fc->vnode;
418 struct afs_call *call;
419 struct afs_net *net = afs_v2net(vnode);
420 __be32 *bp;
421
422 _enter(",%x,{%x:%u},,",
423 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
424
425 call = afs_alloc_flat_call(net, &afs_RXFSFetchStatus_vnode,
426 16, (21 + 3 + 6) * 4);
427 if (!call) {
428 fc->ac.error = -ENOMEM;
429 return -ENOMEM;
430 }
431
432 call->key = fc->key;
433 call->reply[0] = vnode;
434 call->reply[1] = volsync;
435 call->expected_version = new_inode ? 1 : vnode->status.data_version;
436
437 /* marshall the parameters */
438 bp = call->request;
439 bp[0] = htonl(FSFETCHSTATUS);
440 bp[1] = htonl(vnode->fid.vid);
441 bp[2] = htonl(vnode->fid.vnode);
442 bp[3] = htonl(vnode->fid.unique);
443
444 call->cb_break = fc->cb_break;
445 afs_use_fs_server(call, fc->cbi);
446 trace_afs_make_fs_call(call, &vnode->fid);
447 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
448 }
449
450 /*
451 * deliver reply data to an FS.FetchData
452 */
453 static int afs_deliver_fs_fetch_data(struct afs_call *call)
454 {
455 struct afs_vnode *vnode = call->reply[0];
456 struct afs_read *req = call->reply[2];
457 const __be32 *bp;
458 unsigned int size;
459 void *buffer;
460 int ret;
461
462 _enter("{%u,%zu/%u;%llu/%llu}",
463 call->unmarshall, call->offset, call->count,
464 req->remain, req->actual_len);
465
466 switch (call->unmarshall) {
467 case 0:
468 req->actual_len = 0;
469 call->offset = 0;
470 call->unmarshall++;
471 if (call->operation_ID != FSFETCHDATA64) {
472 call->unmarshall++;
473 goto no_msw;
474 }
475
476 /* extract the upper part of the returned data length of an
477 * FSFETCHDATA64 op (which should always be 0 using this
478 * client) */
479 case 1:
480 _debug("extract data length (MSW)");
481 ret = afs_extract_data(call, &call->tmp, 4, true);
482 if (ret < 0)
483 return ret;
484
485 req->actual_len = ntohl(call->tmp);
486 req->actual_len <<= 32;
487 call->offset = 0;
488 call->unmarshall++;
489
490 no_msw:
491 /* extract the returned data length */
492 case 2:
493 _debug("extract data length");
494 ret = afs_extract_data(call, &call->tmp, 4, true);
495 if (ret < 0)
496 return ret;
497
498 req->actual_len |= ntohl(call->tmp);
499 _debug("DATA length: %llu", req->actual_len);
500
501 req->remain = req->actual_len;
502 call->offset = req->pos & (PAGE_SIZE - 1);
503 req->index = 0;
504 if (req->actual_len == 0)
505 goto no_more_data;
506 call->unmarshall++;
507
508 begin_page:
509 ASSERTCMP(req->index, <, req->nr_pages);
510 if (req->remain > PAGE_SIZE - call->offset)
511 size = PAGE_SIZE - call->offset;
512 else
513 size = req->remain;
514 call->count = call->offset + size;
515 ASSERTCMP(call->count, <=, PAGE_SIZE);
516 req->remain -= size;
517
518 /* extract the returned data */
519 case 3:
520 _debug("extract data %llu/%llu %zu/%u",
521 req->remain, req->actual_len, call->offset, call->count);
522
523 buffer = kmap(req->pages[req->index]);
524 ret = afs_extract_data(call, buffer, call->count, true);
525 kunmap(req->pages[req->index]);
526 if (ret < 0)
527 return ret;
528 if (call->offset == PAGE_SIZE) {
529 if (req->page_done)
530 req->page_done(call, req);
531 req->index++;
532 if (req->remain > 0) {
533 call->offset = 0;
534 if (req->index >= req->nr_pages) {
535 call->unmarshall = 4;
536 goto begin_discard;
537 }
538 goto begin_page;
539 }
540 }
541 goto no_more_data;
542
543 /* Discard any excess data the server gave us */
544 begin_discard:
545 case 4:
546 size = min_t(loff_t, sizeof(afs_discard_buffer), req->remain);
547 call->count = size;
548 _debug("extract discard %llu/%llu %zu/%u",
549 req->remain, req->actual_len, call->offset, call->count);
550
551 call->offset = 0;
552 ret = afs_extract_data(call, afs_discard_buffer, call->count, true);
553 req->remain -= call->offset;
554 if (ret < 0)
555 return ret;
556 if (req->remain > 0)
557 goto begin_discard;
558
559 no_more_data:
560 call->offset = 0;
561 call->unmarshall = 5;
562
563 /* extract the metadata */
564 case 5:
565 ret = afs_extract_data(call, call->buffer,
566 (21 + 3 + 6) * 4, false);
567 if (ret < 0)
568 return ret;
569
570 bp = call->buffer;
571 if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
572 &vnode->status.data_version, req) < 0)
573 return afs_protocol_error(call, -EBADMSG);
574 xdr_decode_AFSCallBack(call, vnode, &bp);
575 if (call->reply[1])
576 xdr_decode_AFSVolSync(&bp, call->reply[1]);
577
578 call->offset = 0;
579 call->unmarshall++;
580
581 case 6:
582 break;
583 }
584
585 for (; req->index < req->nr_pages; req->index++) {
586 if (call->count < PAGE_SIZE)
587 zero_user_segment(req->pages[req->index],
588 call->count, PAGE_SIZE);
589 if (req->page_done)
590 req->page_done(call, req);
591 call->count = 0;
592 }
593
594 _leave(" = 0 [done]");
595 return 0;
596 }
597
598 static void afs_fetch_data_destructor(struct afs_call *call)
599 {
600 struct afs_read *req = call->reply[2];
601
602 afs_put_read(req);
603 afs_flat_call_destructor(call);
604 }
605
606 /*
607 * FS.FetchData operation type
608 */
609 static const struct afs_call_type afs_RXFSFetchData = {
610 .name = "FS.FetchData",
611 .op = afs_FS_FetchData,
612 .deliver = afs_deliver_fs_fetch_data,
613 .destructor = afs_fetch_data_destructor,
614 };
615
616 static const struct afs_call_type afs_RXFSFetchData64 = {
617 .name = "FS.FetchData64",
618 .op = afs_FS_FetchData64,
619 .deliver = afs_deliver_fs_fetch_data,
620 .destructor = afs_fetch_data_destructor,
621 };
622
623 /*
624 * fetch data from a very large file
625 */
626 static int afs_fs_fetch_data64(struct afs_fs_cursor *fc, struct afs_read *req)
627 {
628 struct afs_vnode *vnode = fc->vnode;
629 struct afs_call *call;
630 struct afs_net *net = afs_v2net(vnode);
631 __be32 *bp;
632
633 _enter("");
634
635 call = afs_alloc_flat_call(net, &afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4);
636 if (!call)
637 return -ENOMEM;
638
639 call->key = fc->key;
640 call->reply[0] = vnode;
641 call->reply[1] = NULL; /* volsync */
642 call->reply[2] = req;
643 call->expected_version = vnode->status.data_version;
644
645 /* marshall the parameters */
646 bp = call->request;
647 bp[0] = htonl(FSFETCHDATA64);
648 bp[1] = htonl(vnode->fid.vid);
649 bp[2] = htonl(vnode->fid.vnode);
650 bp[3] = htonl(vnode->fid.unique);
651 bp[4] = htonl(upper_32_bits(req->pos));
652 bp[5] = htonl(lower_32_bits(req->pos));
653 bp[6] = 0;
654 bp[7] = htonl(lower_32_bits(req->len));
655
656 refcount_inc(&req->usage);
657 call->cb_break = fc->cb_break;
658 afs_use_fs_server(call, fc->cbi);
659 trace_afs_make_fs_call(call, &vnode->fid);
660 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
661 }
662
663 /*
664 * fetch data from a file
665 */
666 int afs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_read *req)
667 {
668 struct afs_vnode *vnode = fc->vnode;
669 struct afs_call *call;
670 struct afs_net *net = afs_v2net(vnode);
671 __be32 *bp;
672
673 if (upper_32_bits(req->pos) ||
674 upper_32_bits(req->len) ||
675 upper_32_bits(req->pos + req->len))
676 return afs_fs_fetch_data64(fc, req);
677
678 _enter("");
679
680 call = afs_alloc_flat_call(net, &afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
681 if (!call)
682 return -ENOMEM;
683
684 call->key = fc->key;
685 call->reply[0] = vnode;
686 call->reply[1] = NULL; /* volsync */
687 call->reply[2] = req;
688 call->expected_version = vnode->status.data_version;
689
690 /* marshall the parameters */
691 bp = call->request;
692 bp[0] = htonl(FSFETCHDATA);
693 bp[1] = htonl(vnode->fid.vid);
694 bp[2] = htonl(vnode->fid.vnode);
695 bp[3] = htonl(vnode->fid.unique);
696 bp[4] = htonl(lower_32_bits(req->pos));
697 bp[5] = htonl(lower_32_bits(req->len));
698
699 refcount_inc(&req->usage);
700 call->cb_break = fc->cb_break;
701 afs_use_fs_server(call, fc->cbi);
702 trace_afs_make_fs_call(call, &vnode->fid);
703 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
704 }
705
706 /*
707 * deliver reply data to an FS.CreateFile or an FS.MakeDir
708 */
709 static int afs_deliver_fs_create_vnode(struct afs_call *call)
710 {
711 struct afs_vnode *vnode = call->reply[0];
712 const __be32 *bp;
713 int ret;
714
715 _enter("{%u}", call->unmarshall);
716
717 ret = afs_transfer_reply(call);
718 if (ret < 0)
719 return ret;
720
721 /* unmarshall the reply once we've received all of it */
722 bp = call->buffer;
723 xdr_decode_AFSFid(&bp, call->reply[1]);
724 if (xdr_decode_AFSFetchStatus(call, &bp, call->reply[2], NULL, NULL, NULL) < 0 ||
725 xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
726 &call->expected_version, NULL) < 0)
727 return afs_protocol_error(call, -EBADMSG);
728 xdr_decode_AFSCallBack_raw(&bp, call->reply[3]);
729 /* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
730
731 _leave(" = 0 [done]");
732 return 0;
733 }
734
735 /*
736 * FS.CreateFile and FS.MakeDir operation type
737 */
738 static const struct afs_call_type afs_RXFSCreateFile = {
739 .name = "FS.CreateFile",
740 .op = afs_FS_CreateFile,
741 .deliver = afs_deliver_fs_create_vnode,
742 .destructor = afs_flat_call_destructor,
743 };
744
745 static const struct afs_call_type afs_RXFSMakeDir = {
746 .name = "FS.MakeDir",
747 .op = afs_FS_MakeDir,
748 .deliver = afs_deliver_fs_create_vnode,
749 .destructor = afs_flat_call_destructor,
750 };
751
752 /*
753 * create a file or make a directory
754 */
755 int afs_fs_create(struct afs_fs_cursor *fc,
756 const char *name,
757 umode_t mode,
758 u64 current_data_version,
759 struct afs_fid *newfid,
760 struct afs_file_status *newstatus,
761 struct afs_callback *newcb)
762 {
763 struct afs_vnode *vnode = fc->vnode;
764 struct afs_call *call;
765 struct afs_net *net = afs_v2net(vnode);
766 size_t namesz, reqsz, padsz;
767 __be32 *bp;
768
769 _enter("");
770
771 namesz = strlen(name);
772 padsz = (4 - (namesz & 3)) & 3;
773 reqsz = (5 * 4) + namesz + padsz + (6 * 4);
774
775 call = afs_alloc_flat_call(
776 net, S_ISDIR(mode) ? &afs_RXFSMakeDir : &afs_RXFSCreateFile,
777 reqsz, (3 + 21 + 21 + 3 + 6) * 4);
778 if (!call)
779 return -ENOMEM;
780
781 call->key = fc->key;
782 call->reply[0] = vnode;
783 call->reply[1] = newfid;
784 call->reply[2] = newstatus;
785 call->reply[3] = newcb;
786 call->expected_version = current_data_version + 1;
787
788 /* marshall the parameters */
789 bp = call->request;
790 *bp++ = htonl(S_ISDIR(mode) ? FSMAKEDIR : FSCREATEFILE);
791 *bp++ = htonl(vnode->fid.vid);
792 *bp++ = htonl(vnode->fid.vnode);
793 *bp++ = htonl(vnode->fid.unique);
794 *bp++ = htonl(namesz);
795 memcpy(bp, name, namesz);
796 bp = (void *) bp + namesz;
797 if (padsz > 0) {
798 memset(bp, 0, padsz);
799 bp = (void *) bp + padsz;
800 }
801 *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
802 *bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
803 *bp++ = 0; /* owner */
804 *bp++ = 0; /* group */
805 *bp++ = htonl(mode & S_IALLUGO); /* unix mode */
806 *bp++ = 0; /* segment size */
807
808 afs_use_fs_server(call, fc->cbi);
809 trace_afs_make_fs_call(call, &vnode->fid);
810 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
811 }
812
813 /*
814 * deliver reply data to an FS.RemoveFile or FS.RemoveDir
815 */
816 static int afs_deliver_fs_remove(struct afs_call *call)
817 {
818 struct afs_vnode *vnode = call->reply[0];
819 const __be32 *bp;
820 int ret;
821
822 _enter("{%u}", call->unmarshall);
823
824 ret = afs_transfer_reply(call);
825 if (ret < 0)
826 return ret;
827
828 /* unmarshall the reply once we've received all of it */
829 bp = call->buffer;
830 if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
831 &call->expected_version, NULL) < 0)
832 return afs_protocol_error(call, -EBADMSG);
833 /* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
834
835 _leave(" = 0 [done]");
836 return 0;
837 }
838
839 /*
840 * FS.RemoveDir/FS.RemoveFile operation type
841 */
842 static const struct afs_call_type afs_RXFSRemoveFile = {
843 .name = "FS.RemoveFile",
844 .op = afs_FS_RemoveFile,
845 .deliver = afs_deliver_fs_remove,
846 .destructor = afs_flat_call_destructor,
847 };
848
849 static const struct afs_call_type afs_RXFSRemoveDir = {
850 .name = "FS.RemoveDir",
851 .op = afs_FS_RemoveDir,
852 .deliver = afs_deliver_fs_remove,
853 .destructor = afs_flat_call_destructor,
854 };
855
856 /*
857 * remove a file or directory
858 */
859 int afs_fs_remove(struct afs_fs_cursor *fc, const char *name, bool isdir,
860 u64 current_data_version)
861 {
862 struct afs_vnode *vnode = fc->vnode;
863 struct afs_call *call;
864 struct afs_net *net = afs_v2net(vnode);
865 size_t namesz, reqsz, padsz;
866 __be32 *bp;
867
868 _enter("");
869
870 namesz = strlen(name);
871 padsz = (4 - (namesz & 3)) & 3;
872 reqsz = (5 * 4) + namesz + padsz;
873
874 call = afs_alloc_flat_call(
875 net, isdir ? &afs_RXFSRemoveDir : &afs_RXFSRemoveFile,
876 reqsz, (21 + 6) * 4);
877 if (!call)
878 return -ENOMEM;
879
880 call->key = fc->key;
881 call->reply[0] = vnode;
882 call->expected_version = current_data_version + 1;
883
884 /* marshall the parameters */
885 bp = call->request;
886 *bp++ = htonl(isdir ? FSREMOVEDIR : FSREMOVEFILE);
887 *bp++ = htonl(vnode->fid.vid);
888 *bp++ = htonl(vnode->fid.vnode);
889 *bp++ = htonl(vnode->fid.unique);
890 *bp++ = htonl(namesz);
891 memcpy(bp, name, namesz);
892 bp = (void *) bp + namesz;
893 if (padsz > 0) {
894 memset(bp, 0, padsz);
895 bp = (void *) bp + padsz;
896 }
897
898 afs_use_fs_server(call, fc->cbi);
899 trace_afs_make_fs_call(call, &vnode->fid);
900 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
901 }
902
903 /*
904 * deliver reply data to an FS.Link
905 */
906 static int afs_deliver_fs_link(struct afs_call *call)
907 {
908 struct afs_vnode *dvnode = call->reply[0], *vnode = call->reply[1];
909 const __be32 *bp;
910 int ret;
911
912 _enter("{%u}", call->unmarshall);
913
914 ret = afs_transfer_reply(call);
915 if (ret < 0)
916 return ret;
917
918 /* unmarshall the reply once we've received all of it */
919 bp = call->buffer;
920 if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode, NULL, NULL) < 0 ||
921 xdr_decode_AFSFetchStatus(call, &bp, &dvnode->status, dvnode,
922 &call->expected_version, NULL) < 0)
923 return afs_protocol_error(call, -EBADMSG);
924 /* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
925
926 _leave(" = 0 [done]");
927 return 0;
928 }
929
930 /*
931 * FS.Link operation type
932 */
933 static const struct afs_call_type afs_RXFSLink = {
934 .name = "FS.Link",
935 .op = afs_FS_Link,
936 .deliver = afs_deliver_fs_link,
937 .destructor = afs_flat_call_destructor,
938 };
939
940 /*
941 * make a hard link
942 */
943 int afs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
944 const char *name, u64 current_data_version)
945 {
946 struct afs_vnode *dvnode = fc->vnode;
947 struct afs_call *call;
948 struct afs_net *net = afs_v2net(vnode);
949 size_t namesz, reqsz, padsz;
950 __be32 *bp;
951
952 _enter("");
953
954 namesz = strlen(name);
955 padsz = (4 - (namesz & 3)) & 3;
956 reqsz = (5 * 4) + namesz + padsz + (3 * 4);
957
958 call = afs_alloc_flat_call(net, &afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
959 if (!call)
960 return -ENOMEM;
961
962 call->key = fc->key;
963 call->reply[0] = dvnode;
964 call->reply[1] = vnode;
965 call->expected_version = current_data_version + 1;
966
967 /* marshall the parameters */
968 bp = call->request;
969 *bp++ = htonl(FSLINK);
970 *bp++ = htonl(dvnode->fid.vid);
971 *bp++ = htonl(dvnode->fid.vnode);
972 *bp++ = htonl(dvnode->fid.unique);
973 *bp++ = htonl(namesz);
974 memcpy(bp, name, namesz);
975 bp = (void *) bp + namesz;
976 if (padsz > 0) {
977 memset(bp, 0, padsz);
978 bp = (void *) bp + padsz;
979 }
980 *bp++ = htonl(vnode->fid.vid);
981 *bp++ = htonl(vnode->fid.vnode);
982 *bp++ = htonl(vnode->fid.unique);
983
984 afs_use_fs_server(call, fc->cbi);
985 trace_afs_make_fs_call(call, &vnode->fid);
986 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
987 }
988
989 /*
990 * deliver reply data to an FS.Symlink
991 */
992 static int afs_deliver_fs_symlink(struct afs_call *call)
993 {
994 struct afs_vnode *vnode = call->reply[0];
995 const __be32 *bp;
996 int ret;
997
998 _enter("{%u}", call->unmarshall);
999
1000 ret = afs_transfer_reply(call);
1001 if (ret < 0)
1002 return ret;
1003
1004 /* unmarshall the reply once we've received all of it */
1005 bp = call->buffer;
1006 xdr_decode_AFSFid(&bp, call->reply[1]);
1007 if (xdr_decode_AFSFetchStatus(call, &bp, call->reply[2], NULL, NULL, NULL) ||
1008 xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
1009 &call->expected_version, NULL) < 0)
1010 return afs_protocol_error(call, -EBADMSG);
1011 /* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
1012
1013 _leave(" = 0 [done]");
1014 return 0;
1015 }
1016
1017 /*
1018 * FS.Symlink operation type
1019 */
1020 static const struct afs_call_type afs_RXFSSymlink = {
1021 .name = "FS.Symlink",
1022 .op = afs_FS_Symlink,
1023 .deliver = afs_deliver_fs_symlink,
1024 .destructor = afs_flat_call_destructor,
1025 };
1026
1027 /*
1028 * create a symbolic link
1029 */
1030 int afs_fs_symlink(struct afs_fs_cursor *fc,
1031 const char *name,
1032 const char *contents,
1033 u64 current_data_version,
1034 struct afs_fid *newfid,
1035 struct afs_file_status *newstatus)
1036 {
1037 struct afs_vnode *vnode = fc->vnode;
1038 struct afs_call *call;
1039 struct afs_net *net = afs_v2net(vnode);
1040 size_t namesz, reqsz, padsz, c_namesz, c_padsz;
1041 __be32 *bp;
1042
1043 _enter("");
1044
1045 namesz = strlen(name);
1046 padsz = (4 - (namesz & 3)) & 3;
1047
1048 c_namesz = strlen(contents);
1049 c_padsz = (4 - (c_namesz & 3)) & 3;
1050
1051 reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4);
1052
1053 call = afs_alloc_flat_call(net, &afs_RXFSSymlink, reqsz,
1054 (3 + 21 + 21 + 6) * 4);
1055 if (!call)
1056 return -ENOMEM;
1057
1058 call->key = fc->key;
1059 call->reply[0] = vnode;
1060 call->reply[1] = newfid;
1061 call->reply[2] = newstatus;
1062 call->expected_version = current_data_version + 1;
1063
1064 /* marshall the parameters */
1065 bp = call->request;
1066 *bp++ = htonl(FSSYMLINK);
1067 *bp++ = htonl(vnode->fid.vid);
1068 *bp++ = htonl(vnode->fid.vnode);
1069 *bp++ = htonl(vnode->fid.unique);
1070 *bp++ = htonl(namesz);
1071 memcpy(bp, name, namesz);
1072 bp = (void *) bp + namesz;
1073 if (padsz > 0) {
1074 memset(bp, 0, padsz);
1075 bp = (void *) bp + padsz;
1076 }
1077 *bp++ = htonl(c_namesz);
1078 memcpy(bp, contents, c_namesz);
1079 bp = (void *) bp + c_namesz;
1080 if (c_padsz > 0) {
1081 memset(bp, 0, c_padsz);
1082 bp = (void *) bp + c_padsz;
1083 }
1084 *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
1085 *bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
1086 *bp++ = 0; /* owner */
1087 *bp++ = 0; /* group */
1088 *bp++ = htonl(S_IRWXUGO); /* unix mode */
1089 *bp++ = 0; /* segment size */
1090
1091 afs_use_fs_server(call, fc->cbi);
1092 trace_afs_make_fs_call(call, &vnode->fid);
1093 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1094 }
1095
1096 /*
1097 * deliver reply data to an FS.Rename
1098 */
1099 static int afs_deliver_fs_rename(struct afs_call *call)
1100 {
1101 struct afs_vnode *orig_dvnode = call->reply[0], *new_dvnode = call->reply[1];
1102 const __be32 *bp;
1103 int ret;
1104
1105 _enter("{%u}", call->unmarshall);
1106
1107 ret = afs_transfer_reply(call);
1108 if (ret < 0)
1109 return ret;
1110
1111 /* unmarshall the reply once we've received all of it */
1112 bp = call->buffer;
1113 if (xdr_decode_AFSFetchStatus(call, &bp, &orig_dvnode->status, orig_dvnode,
1114 &call->expected_version, NULL) < 0)
1115 return afs_protocol_error(call, -EBADMSG);
1116 if (new_dvnode != orig_dvnode &&
1117 xdr_decode_AFSFetchStatus(call, &bp, &new_dvnode->status, new_dvnode,
1118 &call->expected_version_2, NULL) < 0)
1119 return afs_protocol_error(call, -EBADMSG);
1120 /* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
1121
1122 _leave(" = 0 [done]");
1123 return 0;
1124 }
1125
1126 /*
1127 * FS.Rename operation type
1128 */
1129 static const struct afs_call_type afs_RXFSRename = {
1130 .name = "FS.Rename",
1131 .op = afs_FS_Rename,
1132 .deliver = afs_deliver_fs_rename,
1133 .destructor = afs_flat_call_destructor,
1134 };
1135
1136 /*
1137 * create a symbolic link
1138 */
1139 int afs_fs_rename(struct afs_fs_cursor *fc,
1140 const char *orig_name,
1141 struct afs_vnode *new_dvnode,
1142 const char *new_name,
1143 u64 current_orig_data_version,
1144 u64 current_new_data_version)
1145 {
1146 struct afs_vnode *orig_dvnode = fc->vnode;
1147 struct afs_call *call;
1148 struct afs_net *net = afs_v2net(orig_dvnode);
1149 size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz;
1150 __be32 *bp;
1151
1152 _enter("");
1153
1154 o_namesz = strlen(orig_name);
1155 o_padsz = (4 - (o_namesz & 3)) & 3;
1156
1157 n_namesz = strlen(new_name);
1158 n_padsz = (4 - (n_namesz & 3)) & 3;
1159
1160 reqsz = (4 * 4) +
1161 4 + o_namesz + o_padsz +
1162 (3 * 4) +
1163 4 + n_namesz + n_padsz;
1164
1165 call = afs_alloc_flat_call(net, &afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
1166 if (!call)
1167 return -ENOMEM;
1168
1169 call->key = fc->key;
1170 call->reply[0] = orig_dvnode;
1171 call->reply[1] = new_dvnode;
1172 call->expected_version = current_orig_data_version + 1;
1173 call->expected_version_2 = current_new_data_version + 1;
1174
1175 /* marshall the parameters */
1176 bp = call->request;
1177 *bp++ = htonl(FSRENAME);
1178 *bp++ = htonl(orig_dvnode->fid.vid);
1179 *bp++ = htonl(orig_dvnode->fid.vnode);
1180 *bp++ = htonl(orig_dvnode->fid.unique);
1181 *bp++ = htonl(o_namesz);
1182 memcpy(bp, orig_name, o_namesz);
1183 bp = (void *) bp + o_namesz;
1184 if (o_padsz > 0) {
1185 memset(bp, 0, o_padsz);
1186 bp = (void *) bp + o_padsz;
1187 }
1188
1189 *bp++ = htonl(new_dvnode->fid.vid);
1190 *bp++ = htonl(new_dvnode->fid.vnode);
1191 *bp++ = htonl(new_dvnode->fid.unique);
1192 *bp++ = htonl(n_namesz);
1193 memcpy(bp, new_name, n_namesz);
1194 bp = (void *) bp + n_namesz;
1195 if (n_padsz > 0) {
1196 memset(bp, 0, n_padsz);
1197 bp = (void *) bp + n_padsz;
1198 }
1199
1200 afs_use_fs_server(call, fc->cbi);
1201 trace_afs_make_fs_call(call, &orig_dvnode->fid);
1202 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1203 }
1204
1205 /*
1206 * deliver reply data to an FS.StoreData
1207 */
1208 static int afs_deliver_fs_store_data(struct afs_call *call)
1209 {
1210 struct afs_vnode *vnode = call->reply[0];
1211 const __be32 *bp;
1212 int ret;
1213
1214 _enter("");
1215
1216 ret = afs_transfer_reply(call);
1217 if (ret < 0)
1218 return ret;
1219
1220 /* unmarshall the reply once we've received all of it */
1221 bp = call->buffer;
1222 if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
1223 &call->expected_version, NULL) < 0)
1224 return afs_protocol_error(call, -EBADMSG);
1225 /* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
1226
1227 afs_pages_written_back(vnode, call);
1228
1229 _leave(" = 0 [done]");
1230 return 0;
1231 }
1232
1233 /*
1234 * FS.StoreData operation type
1235 */
1236 static const struct afs_call_type afs_RXFSStoreData = {
1237 .name = "FS.StoreData",
1238 .op = afs_FS_StoreData,
1239 .deliver = afs_deliver_fs_store_data,
1240 .destructor = afs_flat_call_destructor,
1241 };
1242
1243 static const struct afs_call_type afs_RXFSStoreData64 = {
1244 .name = "FS.StoreData64",
1245 .op = afs_FS_StoreData64,
1246 .deliver = afs_deliver_fs_store_data,
1247 .destructor = afs_flat_call_destructor,
1248 };
1249
1250 /*
1251 * store a set of pages to a very large file
1252 */
1253 static int afs_fs_store_data64(struct afs_fs_cursor *fc,
1254 struct address_space *mapping,
1255 pgoff_t first, pgoff_t last,
1256 unsigned offset, unsigned to,
1257 loff_t size, loff_t pos, loff_t i_size)
1258 {
1259 struct afs_vnode *vnode = fc->vnode;
1260 struct afs_call *call;
1261 struct afs_net *net = afs_v2net(vnode);
1262 __be32 *bp;
1263
1264 _enter(",%x,{%x:%u},,",
1265 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1266
1267 call = afs_alloc_flat_call(net, &afs_RXFSStoreData64,
1268 (4 + 6 + 3 * 2) * 4,
1269 (21 + 6) * 4);
1270 if (!call)
1271 return -ENOMEM;
1272
1273 call->key = fc->key;
1274 call->mapping = mapping;
1275 call->reply[0] = vnode;
1276 call->first = first;
1277 call->last = last;
1278 call->first_offset = offset;
1279 call->last_to = to;
1280 call->send_pages = true;
1281 call->expected_version = vnode->status.data_version + 1;
1282
1283 /* marshall the parameters */
1284 bp = call->request;
1285 *bp++ = htonl(FSSTOREDATA64);
1286 *bp++ = htonl(vnode->fid.vid);
1287 *bp++ = htonl(vnode->fid.vnode);
1288 *bp++ = htonl(vnode->fid.unique);
1289
1290 *bp++ = htonl(AFS_SET_MTIME); /* mask */
1291 *bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
1292 *bp++ = 0; /* owner */
1293 *bp++ = 0; /* group */
1294 *bp++ = 0; /* unix mode */
1295 *bp++ = 0; /* segment size */
1296
1297 *bp++ = htonl(pos >> 32);
1298 *bp++ = htonl((u32) pos);
1299 *bp++ = htonl(size >> 32);
1300 *bp++ = htonl((u32) size);
1301 *bp++ = htonl(i_size >> 32);
1302 *bp++ = htonl((u32) i_size);
1303
1304 trace_afs_make_fs_call(call, &vnode->fid);
1305 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1306 }
1307
1308 /*
1309 * store a set of pages
1310 */
1311 int afs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
1312 pgoff_t first, pgoff_t last,
1313 unsigned offset, unsigned to)
1314 {
1315 struct afs_vnode *vnode = fc->vnode;
1316 struct afs_call *call;
1317 struct afs_net *net = afs_v2net(vnode);
1318 loff_t size, pos, i_size;
1319 __be32 *bp;
1320
1321 _enter(",%x,{%x:%u},,",
1322 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1323
1324 size = (loff_t)to - (loff_t)offset;
1325 if (first != last)
1326 size += (loff_t)(last - first) << PAGE_SHIFT;
1327 pos = (loff_t)first << PAGE_SHIFT;
1328 pos += offset;
1329
1330 i_size = i_size_read(&vnode->vfs_inode);
1331 if (pos + size > i_size)
1332 i_size = size + pos;
1333
1334 _debug("size %llx, at %llx, i_size %llx",
1335 (unsigned long long) size, (unsigned long long) pos,
1336 (unsigned long long) i_size);
1337
1338 if (pos >> 32 || i_size >> 32 || size >> 32 || (pos + size) >> 32)
1339 return afs_fs_store_data64(fc, mapping, first, last, offset, to,
1340 size, pos, i_size);
1341
1342 call = afs_alloc_flat_call(net, &afs_RXFSStoreData,
1343 (4 + 6 + 3) * 4,
1344 (21 + 6) * 4);
1345 if (!call)
1346 return -ENOMEM;
1347
1348 call->key = fc->key;
1349 call->mapping = mapping;
1350 call->reply[0] = vnode;
1351 call->first = first;
1352 call->last = last;
1353 call->first_offset = offset;
1354 call->last_to = to;
1355 call->send_pages = true;
1356 call->expected_version = vnode->status.data_version + 1;
1357
1358 /* marshall the parameters */
1359 bp = call->request;
1360 *bp++ = htonl(FSSTOREDATA);
1361 *bp++ = htonl(vnode->fid.vid);
1362 *bp++ = htonl(vnode->fid.vnode);
1363 *bp++ = htonl(vnode->fid.unique);
1364
1365 *bp++ = htonl(AFS_SET_MTIME); /* mask */
1366 *bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
1367 *bp++ = 0; /* owner */
1368 *bp++ = 0; /* group */
1369 *bp++ = 0; /* unix mode */
1370 *bp++ = 0; /* segment size */
1371
1372 *bp++ = htonl(pos);
1373 *bp++ = htonl(size);
1374 *bp++ = htonl(i_size);
1375
1376 afs_use_fs_server(call, fc->cbi);
1377 trace_afs_make_fs_call(call, &vnode->fid);
1378 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1379 }
1380
1381 /*
1382 * deliver reply data to an FS.StoreStatus
1383 */
1384 static int afs_deliver_fs_store_status(struct afs_call *call)
1385 {
1386 struct afs_vnode *vnode = call->reply[0];
1387 const __be32 *bp;
1388 int ret;
1389
1390 _enter("");
1391
1392 ret = afs_transfer_reply(call);
1393 if (ret < 0)
1394 return ret;
1395
1396 /* unmarshall the reply once we've received all of it */
1397 bp = call->buffer;
1398 if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
1399 &call->expected_version, NULL) < 0)
1400 return afs_protocol_error(call, -EBADMSG);
1401 /* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
1402
1403 _leave(" = 0 [done]");
1404 return 0;
1405 }
1406
1407 /*
1408 * FS.StoreStatus operation type
1409 */
1410 static const struct afs_call_type afs_RXFSStoreStatus = {
1411 .name = "FS.StoreStatus",
1412 .op = afs_FS_StoreStatus,
1413 .deliver = afs_deliver_fs_store_status,
1414 .destructor = afs_flat_call_destructor,
1415 };
1416
1417 static const struct afs_call_type afs_RXFSStoreData_as_Status = {
1418 .name = "FS.StoreData",
1419 .op = afs_FS_StoreData,
1420 .deliver = afs_deliver_fs_store_status,
1421 .destructor = afs_flat_call_destructor,
1422 };
1423
1424 static const struct afs_call_type afs_RXFSStoreData64_as_Status = {
1425 .name = "FS.StoreData64",
1426 .op = afs_FS_StoreData64,
1427 .deliver = afs_deliver_fs_store_status,
1428 .destructor = afs_flat_call_destructor,
1429 };
1430
1431 /*
1432 * set the attributes on a very large file, using FS.StoreData rather than
1433 * FS.StoreStatus so as to alter the file size also
1434 */
1435 static int afs_fs_setattr_size64(struct afs_fs_cursor *fc, struct iattr *attr)
1436 {
1437 struct afs_vnode *vnode = fc->vnode;
1438 struct afs_call *call;
1439 struct afs_net *net = afs_v2net(vnode);
1440 __be32 *bp;
1441
1442 _enter(",%x,{%x:%u},,",
1443 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1444
1445 ASSERT(attr->ia_valid & ATTR_SIZE);
1446
1447 call = afs_alloc_flat_call(net, &afs_RXFSStoreData64_as_Status,
1448 (4 + 6 + 3 * 2) * 4,
1449 (21 + 6) * 4);
1450 if (!call)
1451 return -ENOMEM;
1452
1453 call->key = fc->key;
1454 call->reply[0] = vnode;
1455 call->expected_version = vnode->status.data_version + 1;
1456
1457 /* marshall the parameters */
1458 bp = call->request;
1459 *bp++ = htonl(FSSTOREDATA64);
1460 *bp++ = htonl(vnode->fid.vid);
1461 *bp++ = htonl(vnode->fid.vnode);
1462 *bp++ = htonl(vnode->fid.unique);
1463
1464 xdr_encode_AFS_StoreStatus(&bp, attr);
1465
1466 *bp++ = 0; /* position of start of write */
1467 *bp++ = 0;
1468 *bp++ = 0; /* size of write */
1469 *bp++ = 0;
1470 *bp++ = htonl(attr->ia_size >> 32); /* new file length */
1471 *bp++ = htonl((u32) attr->ia_size);
1472
1473 afs_use_fs_server(call, fc->cbi);
1474 trace_afs_make_fs_call(call, &vnode->fid);
1475 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1476 }
1477
1478 /*
1479 * set the attributes on a file, using FS.StoreData rather than FS.StoreStatus
1480 * so as to alter the file size also
1481 */
1482 static int afs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr)
1483 {
1484 struct afs_vnode *vnode = fc->vnode;
1485 struct afs_call *call;
1486 struct afs_net *net = afs_v2net(vnode);
1487 __be32 *bp;
1488
1489 _enter(",%x,{%x:%u},,",
1490 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1491
1492 ASSERT(attr->ia_valid & ATTR_SIZE);
1493 if (attr->ia_size >> 32)
1494 return afs_fs_setattr_size64(fc, attr);
1495
1496 call = afs_alloc_flat_call(net, &afs_RXFSStoreData_as_Status,
1497 (4 + 6 + 3) * 4,
1498 (21 + 6) * 4);
1499 if (!call)
1500 return -ENOMEM;
1501
1502 call->key = fc->key;
1503 call->reply[0] = vnode;
1504 call->expected_version = vnode->status.data_version + 1;
1505
1506 /* marshall the parameters */
1507 bp = call->request;
1508 *bp++ = htonl(FSSTOREDATA);
1509 *bp++ = htonl(vnode->fid.vid);
1510 *bp++ = htonl(vnode->fid.vnode);
1511 *bp++ = htonl(vnode->fid.unique);
1512
1513 xdr_encode_AFS_StoreStatus(&bp, attr);
1514
1515 *bp++ = 0; /* position of start of write */
1516 *bp++ = 0; /* size of write */
1517 *bp++ = htonl(attr->ia_size); /* new file length */
1518
1519 afs_use_fs_server(call, fc->cbi);
1520 trace_afs_make_fs_call(call, &vnode->fid);
1521 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1522 }
1523
1524 /*
1525 * set the attributes on a file, using FS.StoreData if there's a change in file
1526 * size, and FS.StoreStatus otherwise
1527 */
1528 int afs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr)
1529 {
1530 struct afs_vnode *vnode = fc->vnode;
1531 struct afs_call *call;
1532 struct afs_net *net = afs_v2net(vnode);
1533 __be32 *bp;
1534
1535 if (attr->ia_valid & ATTR_SIZE)
1536 return afs_fs_setattr_size(fc, attr);
1537
1538 _enter(",%x,{%x:%u},,",
1539 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1540
1541 call = afs_alloc_flat_call(net, &afs_RXFSStoreStatus,
1542 (4 + 6) * 4,
1543 (21 + 6) * 4);
1544 if (!call)
1545 return -ENOMEM;
1546
1547 call->key = fc->key;
1548 call->reply[0] = vnode;
1549 call->expected_version = vnode->status.data_version;
1550
1551 /* marshall the parameters */
1552 bp = call->request;
1553 *bp++ = htonl(FSSTORESTATUS);
1554 *bp++ = htonl(vnode->fid.vid);
1555 *bp++ = htonl(vnode->fid.vnode);
1556 *bp++ = htonl(vnode->fid.unique);
1557
1558 xdr_encode_AFS_StoreStatus(&bp, attr);
1559
1560 afs_use_fs_server(call, fc->cbi);
1561 trace_afs_make_fs_call(call, &vnode->fid);
1562 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1563 }
1564
1565 /*
1566 * deliver reply data to an FS.GetVolumeStatus
1567 */
1568 static int afs_deliver_fs_get_volume_status(struct afs_call *call)
1569 {
1570 const __be32 *bp;
1571 char *p;
1572 int ret;
1573
1574 _enter("{%u}", call->unmarshall);
1575
1576 switch (call->unmarshall) {
1577 case 0:
1578 call->offset = 0;
1579 call->unmarshall++;
1580
1581 /* extract the returned status record */
1582 case 1:
1583 _debug("extract status");
1584 ret = afs_extract_data(call, call->buffer,
1585 12 * 4, true);
1586 if (ret < 0)
1587 return ret;
1588
1589 bp = call->buffer;
1590 xdr_decode_AFSFetchVolumeStatus(&bp, call->reply[1]);
1591 call->offset = 0;
1592 call->unmarshall++;
1593
1594 /* extract the volume name length */
1595 case 2:
1596 ret = afs_extract_data(call, &call->tmp, 4, true);
1597 if (ret < 0)
1598 return ret;
1599
1600 call->count = ntohl(call->tmp);
1601 _debug("volname length: %u", call->count);
1602 if (call->count >= AFSNAMEMAX)
1603 return afs_protocol_error(call, -EBADMSG);
1604 call->offset = 0;
1605 call->unmarshall++;
1606
1607 /* extract the volume name */
1608 case 3:
1609 _debug("extract volname");
1610 if (call->count > 0) {
1611 ret = afs_extract_data(call, call->reply[2],
1612 call->count, true);
1613 if (ret < 0)
1614 return ret;
1615 }
1616
1617 p = call->reply[2];
1618 p[call->count] = 0;
1619 _debug("volname '%s'", p);
1620
1621 call->offset = 0;
1622 call->unmarshall++;
1623
1624 /* extract the volume name padding */
1625 if ((call->count & 3) == 0) {
1626 call->unmarshall++;
1627 goto no_volname_padding;
1628 }
1629 call->count = 4 - (call->count & 3);
1630
1631 case 4:
1632 ret = afs_extract_data(call, call->buffer,
1633 call->count, true);
1634 if (ret < 0)
1635 return ret;
1636
1637 call->offset = 0;
1638 call->unmarshall++;
1639 no_volname_padding:
1640
1641 /* extract the offline message length */
1642 case 5:
1643 ret = afs_extract_data(call, &call->tmp, 4, true);
1644 if (ret < 0)
1645 return ret;
1646
1647 call->count = ntohl(call->tmp);
1648 _debug("offline msg length: %u", call->count);
1649 if (call->count >= AFSNAMEMAX)
1650 return afs_protocol_error(call, -EBADMSG);
1651 call->offset = 0;
1652 call->unmarshall++;
1653
1654 /* extract the offline message */
1655 case 6:
1656 _debug("extract offline");
1657 if (call->count > 0) {
1658 ret = afs_extract_data(call, call->reply[2],
1659 call->count, true);
1660 if (ret < 0)
1661 return ret;
1662 }
1663
1664 p = call->reply[2];
1665 p[call->count] = 0;
1666 _debug("offline '%s'", p);
1667
1668 call->offset = 0;
1669 call->unmarshall++;
1670
1671 /* extract the offline message padding */
1672 if ((call->count & 3) == 0) {
1673 call->unmarshall++;
1674 goto no_offline_padding;
1675 }
1676 call->count = 4 - (call->count & 3);
1677
1678 case 7:
1679 ret = afs_extract_data(call, call->buffer,
1680 call->count, true);
1681 if (ret < 0)
1682 return ret;
1683
1684 call->offset = 0;
1685 call->unmarshall++;
1686 no_offline_padding:
1687
1688 /* extract the message of the day length */
1689 case 8:
1690 ret = afs_extract_data(call, &call->tmp, 4, true);
1691 if (ret < 0)
1692 return ret;
1693
1694 call->count = ntohl(call->tmp);
1695 _debug("motd length: %u", call->count);
1696 if (call->count >= AFSNAMEMAX)
1697 return afs_protocol_error(call, -EBADMSG);
1698 call->offset = 0;
1699 call->unmarshall++;
1700
1701 /* extract the message of the day */
1702 case 9:
1703 _debug("extract motd");
1704 if (call->count > 0) {
1705 ret = afs_extract_data(call, call->reply[2],
1706 call->count, true);
1707 if (ret < 0)
1708 return ret;
1709 }
1710
1711 p = call->reply[2];
1712 p[call->count] = 0;
1713 _debug("motd '%s'", p);
1714
1715 call->offset = 0;
1716 call->unmarshall++;
1717
1718 /* extract the message of the day padding */
1719 call->count = (4 - (call->count & 3)) & 3;
1720
1721 case 10:
1722 ret = afs_extract_data(call, call->buffer,
1723 call->count, false);
1724 if (ret < 0)
1725 return ret;
1726
1727 call->offset = 0;
1728 call->unmarshall++;
1729 case 11:
1730 break;
1731 }
1732
1733 _leave(" = 0 [done]");
1734 return 0;
1735 }
1736
1737 /*
1738 * destroy an FS.GetVolumeStatus call
1739 */
1740 static void afs_get_volume_status_call_destructor(struct afs_call *call)
1741 {
1742 kfree(call->reply[2]);
1743 call->reply[2] = NULL;
1744 afs_flat_call_destructor(call);
1745 }
1746
1747 /*
1748 * FS.GetVolumeStatus operation type
1749 */
1750 static const struct afs_call_type afs_RXFSGetVolumeStatus = {
1751 .name = "FS.GetVolumeStatus",
1752 .op = afs_FS_GetVolumeStatus,
1753 .deliver = afs_deliver_fs_get_volume_status,
1754 .destructor = afs_get_volume_status_call_destructor,
1755 };
1756
1757 /*
1758 * fetch the status of a volume
1759 */
1760 int afs_fs_get_volume_status(struct afs_fs_cursor *fc,
1761 struct afs_volume_status *vs)
1762 {
1763 struct afs_vnode *vnode = fc->vnode;
1764 struct afs_call *call;
1765 struct afs_net *net = afs_v2net(vnode);
1766 __be32 *bp;
1767 void *tmpbuf;
1768
1769 _enter("");
1770
1771 tmpbuf = kmalloc(AFSOPAQUEMAX, GFP_KERNEL);
1772 if (!tmpbuf)
1773 return -ENOMEM;
1774
1775 call = afs_alloc_flat_call(net, &afs_RXFSGetVolumeStatus, 2 * 4, 12 * 4);
1776 if (!call) {
1777 kfree(tmpbuf);
1778 return -ENOMEM;
1779 }
1780
1781 call->key = fc->key;
1782 call->reply[0] = vnode;
1783 call->reply[1] = vs;
1784 call->reply[2] = tmpbuf;
1785
1786 /* marshall the parameters */
1787 bp = call->request;
1788 bp[0] = htonl(FSGETVOLUMESTATUS);
1789 bp[1] = htonl(vnode->fid.vid);
1790
1791 afs_use_fs_server(call, fc->cbi);
1792 trace_afs_make_fs_call(call, &vnode->fid);
1793 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1794 }
1795
1796 /*
1797 * deliver reply data to an FS.SetLock, FS.ExtendLock or FS.ReleaseLock
1798 */
1799 static int afs_deliver_fs_xxxx_lock(struct afs_call *call)
1800 {
1801 const __be32 *bp;
1802 int ret;
1803
1804 _enter("{%u}", call->unmarshall);
1805
1806 ret = afs_transfer_reply(call);
1807 if (ret < 0)
1808 return ret;
1809
1810 /* unmarshall the reply once we've received all of it */
1811 bp = call->buffer;
1812 /* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
1813
1814 _leave(" = 0 [done]");
1815 return 0;
1816 }
1817
1818 /*
1819 * FS.SetLock operation type
1820 */
1821 static const struct afs_call_type afs_RXFSSetLock = {
1822 .name = "FS.SetLock",
1823 .op = afs_FS_SetLock,
1824 .deliver = afs_deliver_fs_xxxx_lock,
1825 .destructor = afs_flat_call_destructor,
1826 };
1827
1828 /*
1829 * FS.ExtendLock operation type
1830 */
1831 static const struct afs_call_type afs_RXFSExtendLock = {
1832 .name = "FS.ExtendLock",
1833 .op = afs_FS_ExtendLock,
1834 .deliver = afs_deliver_fs_xxxx_lock,
1835 .destructor = afs_flat_call_destructor,
1836 };
1837
1838 /*
1839 * FS.ReleaseLock operation type
1840 */
1841 static const struct afs_call_type afs_RXFSReleaseLock = {
1842 .name = "FS.ReleaseLock",
1843 .op = afs_FS_ReleaseLock,
1844 .deliver = afs_deliver_fs_xxxx_lock,
1845 .destructor = afs_flat_call_destructor,
1846 };
1847
1848 /*
1849 * Set a lock on a file
1850 */
1851 int afs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type)
1852 {
1853 struct afs_vnode *vnode = fc->vnode;
1854 struct afs_call *call;
1855 struct afs_net *net = afs_v2net(vnode);
1856 __be32 *bp;
1857
1858 _enter("");
1859
1860 call = afs_alloc_flat_call(net, &afs_RXFSSetLock, 5 * 4, 6 * 4);
1861 if (!call)
1862 return -ENOMEM;
1863
1864 call->key = fc->key;
1865 call->reply[0] = vnode;
1866
1867 /* marshall the parameters */
1868 bp = call->request;
1869 *bp++ = htonl(FSSETLOCK);
1870 *bp++ = htonl(vnode->fid.vid);
1871 *bp++ = htonl(vnode->fid.vnode);
1872 *bp++ = htonl(vnode->fid.unique);
1873 *bp++ = htonl(type);
1874
1875 afs_use_fs_server(call, fc->cbi);
1876 trace_afs_make_fs_call(call, &vnode->fid);
1877 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1878 }
1879
1880 /*
1881 * extend a lock on a file
1882 */
1883 int afs_fs_extend_lock(struct afs_fs_cursor *fc)
1884 {
1885 struct afs_vnode *vnode = fc->vnode;
1886 struct afs_call *call;
1887 struct afs_net *net = afs_v2net(vnode);
1888 __be32 *bp;
1889
1890 _enter("");
1891
1892 call = afs_alloc_flat_call(net, &afs_RXFSExtendLock, 4 * 4, 6 * 4);
1893 if (!call)
1894 return -ENOMEM;
1895
1896 call->key = fc->key;
1897 call->reply[0] = vnode;
1898
1899 /* marshall the parameters */
1900 bp = call->request;
1901 *bp++ = htonl(FSEXTENDLOCK);
1902 *bp++ = htonl(vnode->fid.vid);
1903 *bp++ = htonl(vnode->fid.vnode);
1904 *bp++ = htonl(vnode->fid.unique);
1905
1906 afs_use_fs_server(call, fc->cbi);
1907 trace_afs_make_fs_call(call, &vnode->fid);
1908 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1909 }
1910
1911 /*
1912 * release a lock on a file
1913 */
1914 int afs_fs_release_lock(struct afs_fs_cursor *fc)
1915 {
1916 struct afs_vnode *vnode = fc->vnode;
1917 struct afs_call *call;
1918 struct afs_net *net = afs_v2net(vnode);
1919 __be32 *bp;
1920
1921 _enter("");
1922
1923 call = afs_alloc_flat_call(net, &afs_RXFSReleaseLock, 4 * 4, 6 * 4);
1924 if (!call)
1925 return -ENOMEM;
1926
1927 call->key = fc->key;
1928 call->reply[0] = vnode;
1929
1930 /* marshall the parameters */
1931 bp = call->request;
1932 *bp++ = htonl(FSRELEASELOCK);
1933 *bp++ = htonl(vnode->fid.vid);
1934 *bp++ = htonl(vnode->fid.vnode);
1935 *bp++ = htonl(vnode->fid.unique);
1936
1937 afs_use_fs_server(call, fc->cbi);
1938 trace_afs_make_fs_call(call, &vnode->fid);
1939 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
1940 }
1941
1942 /*
1943 * Deliver reply data to an FS.GiveUpAllCallBacks operation.
1944 */
1945 static int afs_deliver_fs_give_up_all_callbacks(struct afs_call *call)
1946 {
1947 return afs_transfer_reply(call);
1948 }
1949
1950 /*
1951 * FS.GiveUpAllCallBacks operation type
1952 */
1953 static const struct afs_call_type afs_RXFSGiveUpAllCallBacks = {
1954 .name = "FS.GiveUpAllCallBacks",
1955 .op = afs_FS_GiveUpAllCallBacks,
1956 .deliver = afs_deliver_fs_give_up_all_callbacks,
1957 .destructor = afs_flat_call_destructor,
1958 };
1959
1960 /*
1961 * Flush all the callbacks we have on a server.
1962 */
1963 int afs_fs_give_up_all_callbacks(struct afs_net *net,
1964 struct afs_server *server,
1965 struct afs_addr_cursor *ac,
1966 struct key *key)
1967 {
1968 struct afs_call *call;
1969 __be32 *bp;
1970
1971 _enter("");
1972
1973 call = afs_alloc_flat_call(net, &afs_RXFSGiveUpAllCallBacks, 1 * 4, 0);
1974 if (!call)
1975 return -ENOMEM;
1976
1977 call->key = key;
1978
1979 /* marshall the parameters */
1980 bp = call->request;
1981 *bp++ = htonl(FSGIVEUPALLCALLBACKS);
1982
1983 /* Can't take a ref on server */
1984 return afs_make_call(ac, call, GFP_NOFS, false);
1985 }
1986
1987 /*
1988 * Deliver reply data to an FS.GetCapabilities operation.
1989 */
1990 static int afs_deliver_fs_get_capabilities(struct afs_call *call)
1991 {
1992 u32 count;
1993 int ret;
1994
1995 _enter("{%u,%zu/%u}", call->unmarshall, call->offset, call->count);
1996
1997 again:
1998 switch (call->unmarshall) {
1999 case 0:
2000 call->offset = 0;
2001 call->unmarshall++;
2002
2003 /* Extract the capabilities word count */
2004 case 1:
2005 ret = afs_extract_data(call, &call->tmp,
2006 1 * sizeof(__be32),
2007 true);
2008 if (ret < 0)
2009 return ret;
2010
2011 count = ntohl(call->tmp);
2012
2013 call->count = count;
2014 call->count2 = count;
2015 call->offset = 0;
2016 call->unmarshall++;
2017
2018 /* Extract capabilities words */
2019 case 2:
2020 count = min(call->count, 16U);
2021 ret = afs_extract_data(call, call->buffer,
2022 count * sizeof(__be32),
2023 call->count > 16);
2024 if (ret < 0)
2025 return ret;
2026
2027 /* TODO: Examine capabilities */
2028
2029 call->count -= count;
2030 if (call->count > 0)
2031 goto again;
2032 call->offset = 0;
2033 call->unmarshall++;
2034 break;
2035 }
2036
2037 _leave(" = 0 [done]");
2038 return 0;
2039 }
2040
2041 /*
2042 * FS.GetCapabilities operation type
2043 */
2044 static const struct afs_call_type afs_RXFSGetCapabilities = {
2045 .name = "FS.GetCapabilities",
2046 .op = afs_FS_GetCapabilities,
2047 .deliver = afs_deliver_fs_get_capabilities,
2048 .destructor = afs_flat_call_destructor,
2049 };
2050
2051 /*
2052 * Probe a fileserver for the capabilities that it supports. This can
2053 * return up to 196 words.
2054 */
2055 int afs_fs_get_capabilities(struct afs_net *net,
2056 struct afs_server *server,
2057 struct afs_addr_cursor *ac,
2058 struct key *key)
2059 {
2060 struct afs_call *call;
2061 __be32 *bp;
2062
2063 _enter("");
2064
2065 call = afs_alloc_flat_call(net, &afs_RXFSGetCapabilities, 1 * 4, 16 * 4);
2066 if (!call)
2067 return -ENOMEM;
2068
2069 call->key = key;
2070
2071 /* marshall the parameters */
2072 bp = call->request;
2073 *bp++ = htonl(FSGETCAPABILITIES);
2074
2075 /* Can't take a ref on server */
2076 trace_afs_make_fs_call(call, NULL);
2077 return afs_make_call(ac, call, GFP_NOFS, false);
2078 }
2079
2080 /*
2081 * Deliver reply data to an FS.FetchStatus with no vnode.
2082 */
2083 static int afs_deliver_fs_fetch_status(struct afs_call *call)
2084 {
2085 struct afs_file_status *status = call->reply[1];
2086 struct afs_callback *callback = call->reply[2];
2087 struct afs_volsync *volsync = call->reply[3];
2088 struct afs_vnode *vnode = call->reply[0];
2089 const __be32 *bp;
2090 int ret;
2091
2092 ret = afs_transfer_reply(call);
2093 if (ret < 0)
2094 return ret;
2095
2096 _enter("{%x:%u}", vnode->fid.vid, vnode->fid.vnode);
2097
2098 /* unmarshall the reply once we've received all of it */
2099 bp = call->buffer;
2100 xdr_decode_AFSFetchStatus(call, &bp, status, vnode,
2101 &call->expected_version, NULL);
2102 callback[call->count].version = ntohl(bp[0]);
2103 callback[call->count].expiry = ntohl(bp[1]);
2104 callback[call->count].type = ntohl(bp[2]);
2105 if (vnode)
2106 xdr_decode_AFSCallBack(call, vnode, &bp);
2107 else
2108 bp += 3;
2109 if (volsync)
2110 xdr_decode_AFSVolSync(&bp, volsync);
2111
2112 _leave(" = 0 [done]");
2113 return 0;
2114 }
2115
2116 /*
2117 * FS.FetchStatus operation type
2118 */
2119 static const struct afs_call_type afs_RXFSFetchStatus = {
2120 .name = "FS.FetchStatus",
2121 .op = afs_FS_FetchStatus,
2122 .deliver = afs_deliver_fs_fetch_status,
2123 .destructor = afs_flat_call_destructor,
2124 };
2125
2126 /*
2127 * Fetch the status information for a fid without needing a vnode handle.
2128 */
2129 int afs_fs_fetch_status(struct afs_fs_cursor *fc,
2130 struct afs_net *net,
2131 struct afs_fid *fid,
2132 struct afs_file_status *status,
2133 struct afs_callback *callback,
2134 struct afs_volsync *volsync)
2135 {
2136 struct afs_call *call;
2137 __be32 *bp;
2138
2139 _enter(",%x,{%x:%u},,",
2140 key_serial(fc->key), fid->vid, fid->vnode);
2141
2142 call = afs_alloc_flat_call(net, &afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4);
2143 if (!call) {
2144 fc->ac.error = -ENOMEM;
2145 return -ENOMEM;
2146 }
2147
2148 call->key = fc->key;
2149 call->reply[0] = NULL; /* vnode for fid[0] */
2150 call->reply[1] = status;
2151 call->reply[2] = callback;
2152 call->reply[3] = volsync;
2153 call->expected_version = 1; /* vnode->status.data_version */
2154
2155 /* marshall the parameters */
2156 bp = call->request;
2157 bp[0] = htonl(FSFETCHSTATUS);
2158 bp[1] = htonl(fid->vid);
2159 bp[2] = htonl(fid->vnode);
2160 bp[3] = htonl(fid->unique);
2161
2162 call->cb_break = fc->cb_break;
2163 afs_use_fs_server(call, fc->cbi);
2164 trace_afs_make_fs_call(call, fid);
2165 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
2166 }
2167
2168 /*
2169 * Deliver reply data to an FS.InlineBulkStatus call
2170 */
2171 static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
2172 {
2173 struct afs_file_status *statuses;
2174 struct afs_callback *callbacks;
2175 struct afs_vnode *vnode = call->reply[0];
2176 const __be32 *bp;
2177 u32 tmp;
2178 int ret;
2179
2180 _enter("{%u}", call->unmarshall);
2181
2182 switch (call->unmarshall) {
2183 case 0:
2184 call->offset = 0;
2185 call->unmarshall++;
2186
2187 /* Extract the file status count and array in two steps */
2188 case 1:
2189 _debug("extract status count");
2190 ret = afs_extract_data(call, &call->tmp, 4, true);
2191 if (ret < 0)
2192 return ret;
2193
2194 tmp = ntohl(call->tmp);
2195 _debug("status count: %u/%u", tmp, call->count2);
2196 if (tmp != call->count2)
2197 return afs_protocol_error(call, -EBADMSG);
2198
2199 call->count = 0;
2200 call->unmarshall++;
2201 more_counts:
2202 call->offset = 0;
2203
2204 case 2:
2205 _debug("extract status array %u", call->count);
2206 ret = afs_extract_data(call, call->buffer, 21 * 4, true);
2207 if (ret < 0)
2208 return ret;
2209
2210 bp = call->buffer;
2211 statuses = call->reply[1];
2212 if (xdr_decode_AFSFetchStatus(call, &bp, &statuses[call->count],
2213 call->count == 0 ? vnode : NULL,
2214 NULL, NULL) < 0)
2215 return afs_protocol_error(call, -EBADMSG);
2216
2217 call->count++;
2218 if (call->count < call->count2)
2219 goto more_counts;
2220
2221 call->count = 0;
2222 call->unmarshall++;
2223 call->offset = 0;
2224
2225 /* Extract the callback count and array in two steps */
2226 case 3:
2227 _debug("extract CB count");
2228 ret = afs_extract_data(call, &call->tmp, 4, true);
2229 if (ret < 0)
2230 return ret;
2231
2232 tmp = ntohl(call->tmp);
2233 _debug("CB count: %u", tmp);
2234 if (tmp != call->count2)
2235 return afs_protocol_error(call, -EBADMSG);
2236 call->count = 0;
2237 call->unmarshall++;
2238 more_cbs:
2239 call->offset = 0;
2240
2241 case 4:
2242 _debug("extract CB array");
2243 ret = afs_extract_data(call, call->buffer, 3 * 4, true);
2244 if (ret < 0)
2245 return ret;
2246
2247 _debug("unmarshall CB array");
2248 bp = call->buffer;
2249 callbacks = call->reply[2];
2250 callbacks[call->count].version = ntohl(bp[0]);
2251 callbacks[call->count].expiry = ntohl(bp[1]);
2252 callbacks[call->count].type = ntohl(bp[2]);
2253 statuses = call->reply[1];
2254 if (call->count == 0 && vnode && statuses[0].abort_code == 0)
2255 xdr_decode_AFSCallBack(call, vnode, &bp);
2256 call->count++;
2257 if (call->count < call->count2)
2258 goto more_cbs;
2259
2260 call->offset = 0;
2261 call->unmarshall++;
2262
2263 case 5:
2264 ret = afs_extract_data(call, call->buffer, 6 * 4, false);
2265 if (ret < 0)
2266 return ret;
2267
2268 bp = call->buffer;
2269 if (call->reply[3])
2270 xdr_decode_AFSVolSync(&bp, call->reply[3]);
2271
2272 call->offset = 0;
2273 call->unmarshall++;
2274
2275 case 6:
2276 break;
2277 }
2278
2279 _leave(" = 0 [done]");
2280 return 0;
2281 }
2282
2283 /*
2284 * FS.InlineBulkStatus operation type
2285 */
2286 static const struct afs_call_type afs_RXFSInlineBulkStatus = {
2287 .name = "FS.InlineBulkStatus",
2288 .op = afs_FS_InlineBulkStatus,
2289 .deliver = afs_deliver_fs_inline_bulk_status,
2290 .destructor = afs_flat_call_destructor,
2291 };
2292
2293 /*
2294 * Fetch the status information for up to 50 files
2295 */
2296 int afs_fs_inline_bulk_status(struct afs_fs_cursor *fc,
2297 struct afs_net *net,
2298 struct afs_fid *fids,
2299 struct afs_file_status *statuses,
2300 struct afs_callback *callbacks,
2301 unsigned int nr_fids,
2302 struct afs_volsync *volsync)
2303 {
2304 struct afs_call *call;
2305 __be32 *bp;
2306 int i;
2307
2308 _enter(",%x,{%x:%u},%u",
2309 key_serial(fc->key), fids[0].vid, fids[1].vnode, nr_fids);
2310
2311 call = afs_alloc_flat_call(net, &afs_RXFSInlineBulkStatus,
2312 (2 + nr_fids * 3) * 4,
2313 21 * 4);
2314 if (!call) {
2315 fc->ac.error = -ENOMEM;
2316 return -ENOMEM;
2317 }
2318
2319 call->key = fc->key;
2320 call->reply[0] = NULL; /* vnode for fid[0] */
2321 call->reply[1] = statuses;
2322 call->reply[2] = callbacks;
2323 call->reply[3] = volsync;
2324 call->count2 = nr_fids;
2325
2326 /* marshall the parameters */
2327 bp = call->request;
2328 *bp++ = htonl(FSINLINEBULKSTATUS);
2329 *bp++ = htonl(nr_fids);
2330 for (i = 0; i < nr_fids; i++) {
2331 *bp++ = htonl(fids[i].vid);
2332 *bp++ = htonl(fids[i].vnode);
2333 *bp++ = htonl(fids[i].unique);
2334 }
2335
2336 call->cb_break = fc->cb_break;
2337 afs_use_fs_server(call, fc->cbi);
2338 trace_afs_make_fs_call(call, &fids[0]);
2339 return afs_make_call(&fc->ac, call, GFP_NOFS, false);
2340 }
(deprecated) Btrfs devel tree