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fs: take i_mutex during prepare_binprm for set[ug]id executables
[linux/fpc-iii.git] / fs / afs / fsclient.c
blobc2e930ec288899cde31e96150dc828d8ec495b60
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 */
22 static 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 */
35 static 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 */
135 static 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
146 static 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 */
160 static 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 */
177 static 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 */
215 static 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 */
238 static int afs_deliver_fs_fetch_status(struct afs_call *call,
239 struct sk_buff *skb, bool last)
240 {
241 struct afs_vnode *vnode = call->reply;
242 const __be32 *bp;
243
244 _enter(",,%u", last);
245
246 afs_transfer_reply(call, skb);
247 if (!last)
248 return 0;
249
250 if (call->reply_size != call->reply_max)
251 return -EBADMSG;
252
253 /* unmarshall the reply once we've received all of it */
254 bp = call->buffer;
255 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
256 xdr_decode_AFSCallBack(&bp, vnode);
257 if (call->reply2)
258 xdr_decode_AFSVolSync(&bp, call->reply2);
259
260 _leave(" = 0 [done]");
261 return 0;
262 }
263
264 /*
265 * FS.FetchStatus operation type
266 */
267 static const struct afs_call_type afs_RXFSFetchStatus = {
268 .name = "FS.FetchStatus",
269 .deliver = afs_deliver_fs_fetch_status,
270 .abort_to_error = afs_abort_to_error,
271 .destructor = afs_flat_call_destructor,
272 };
273
274 /*
275 * fetch the status information for a file
276 */
277 int afs_fs_fetch_file_status(struct afs_server *server,
278 struct key *key,
279 struct afs_vnode *vnode,
280 struct afs_volsync *volsync,
281 const struct afs_wait_mode *wait_mode)
282 {
283 struct afs_call *call;
284 __be32 *bp;
285
286 _enter(",%x,{%x:%u},,",
287 key_serial(key), vnode->fid.vid, vnode->fid.vnode);
288
289 call = afs_alloc_flat_call(&afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4);
290 if (!call)
291 return -ENOMEM;
292
293 call->key = key;
294 call->reply = vnode;
295 call->reply2 = volsync;
296 call->service_id = FS_SERVICE;
297 call->port = htons(AFS_FS_PORT);
298
299 /* marshall the parameters */
300 bp = call->request;
301 bp[0] = htonl(FSFETCHSTATUS);
302 bp[1] = htonl(vnode->fid.vid);
303 bp[2] = htonl(vnode->fid.vnode);
304 bp[3] = htonl(vnode->fid.unique);
305
306 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
307 }
308
309 /*
310 * deliver reply data to an FS.FetchData
311 */
312 static int afs_deliver_fs_fetch_data(struct afs_call *call,
313 struct sk_buff *skb, bool last)
314 {
315 struct afs_vnode *vnode = call->reply;
316 const __be32 *bp;
317 struct page *page;
318 void *buffer;
319 int ret;
320
321 _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
322
323 switch (call->unmarshall) {
324 case 0:
325 call->offset = 0;
326 call->unmarshall++;
327 if (call->operation_ID != FSFETCHDATA64) {
328 call->unmarshall++;
329 goto no_msw;
330 }
331
332 /* extract the upper part of the returned data length of an
333 * FSFETCHDATA64 op (which should always be 0 using this
334 * client) */
335 case 1:
336 _debug("extract data length (MSW)");
337 ret = afs_extract_data(call, skb, last, &call->tmp, 4);
338 switch (ret) {
339 case 0: break;
340 case -EAGAIN: return 0;
341 default: return ret;
342 }
343
344 call->count = ntohl(call->tmp);
345 _debug("DATA length MSW: %u", call->count);
346 if (call->count > 0)
347 return -EBADMSG;
348 call->offset = 0;
349 call->unmarshall++;
350
351 no_msw:
352 /* extract the returned data length */
353 case 2:
354 _debug("extract data length");
355 ret = afs_extract_data(call, skb, last, &call->tmp, 4);
356 switch (ret) {
357 case 0: break;
358 case -EAGAIN: return 0;
359 default: return ret;
360 }
361
362 call->count = ntohl(call->tmp);
363 _debug("DATA length: %u", call->count);
364 if (call->count > PAGE_SIZE)
365 return -EBADMSG;
366 call->offset = 0;
367 call->unmarshall++;
368
369 /* extract the returned data */
370 case 3:
371 _debug("extract data");
372 if (call->count > 0) {
373 page = call->reply3;
374 buffer = kmap_atomic(page);
375 ret = afs_extract_data(call, skb, last, buffer,
376 call->count);
377 kunmap_atomic(buffer);
378 switch (ret) {
379 case 0: break;
380 case -EAGAIN: return 0;
381 default: return ret;
382 }
383 }
384
385 call->offset = 0;
386 call->unmarshall++;
387
388 /* extract the metadata */
389 case 4:
390 ret = afs_extract_data(call, skb, last, call->buffer,
391 (21 + 3 + 6) * 4);
392 switch (ret) {
393 case 0: break;
394 case -EAGAIN: return 0;
395 default: return ret;
396 }
397
398 bp = call->buffer;
399 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
400 xdr_decode_AFSCallBack(&bp, vnode);
401 if (call->reply2)
402 xdr_decode_AFSVolSync(&bp, call->reply2);
403
404 call->offset = 0;
405 call->unmarshall++;
406
407 case 5:
408 _debug("trailer");
409 if (skb->len != 0)
410 return -EBADMSG;
411 break;
412 }
413
414 if (!last)
415 return 0;
416
417 if (call->count < PAGE_SIZE) {
418 _debug("clear");
419 page = call->reply3;
420 buffer = kmap_atomic(page);
421 memset(buffer + call->count, 0, PAGE_SIZE - call->count);
422 kunmap_atomic(buffer);
423 }
424
425 _leave(" = 0 [done]");
426 return 0;
427 }
428
429 /*
430 * FS.FetchData operation type
431 */
432 static const struct afs_call_type afs_RXFSFetchData = {
433 .name = "FS.FetchData",
434 .deliver = afs_deliver_fs_fetch_data,
435 .abort_to_error = afs_abort_to_error,
436 .destructor = afs_flat_call_destructor,
437 };
438
439 static const struct afs_call_type afs_RXFSFetchData64 = {
440 .name = "FS.FetchData64",
441 .deliver = afs_deliver_fs_fetch_data,
442 .abort_to_error = afs_abort_to_error,
443 .destructor = afs_flat_call_destructor,
444 };
445
446 /*
447 * fetch data from a very large file
448 */
449 static int afs_fs_fetch_data64(struct afs_server *server,
450 struct key *key,
451 struct afs_vnode *vnode,
452 off_t offset, size_t length,
453 struct page *buffer,
454 const struct afs_wait_mode *wait_mode)
455 {
456 struct afs_call *call;
457 __be32 *bp;
458
459 _enter("");
460
461 ASSERTCMP(length, <, ULONG_MAX);
462
463 call = afs_alloc_flat_call(&afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4);
464 if (!call)
465 return -ENOMEM;
466
467 call->key = key;
468 call->reply = vnode;
469 call->reply2 = NULL; /* volsync */
470 call->reply3 = buffer;
471 call->service_id = FS_SERVICE;
472 call->port = htons(AFS_FS_PORT);
473 call->operation_ID = FSFETCHDATA64;
474
475 /* marshall the parameters */
476 bp = call->request;
477 bp[0] = htonl(FSFETCHDATA64);
478 bp[1] = htonl(vnode->fid.vid);
479 bp[2] = htonl(vnode->fid.vnode);
480 bp[3] = htonl(vnode->fid.unique);
481 bp[4] = htonl(upper_32_bits(offset));
482 bp[5] = htonl((u32) offset);
483 bp[6] = 0;
484 bp[7] = htonl((u32) length);
485
486 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
487 }
488
489 /*
490 * fetch data from a file
491 */
492 int afs_fs_fetch_data(struct afs_server *server,
493 struct key *key,
494 struct afs_vnode *vnode,
495 off_t offset, size_t length,
496 struct page *buffer,
497 const struct afs_wait_mode *wait_mode)
498 {
499 struct afs_call *call;
500 __be32 *bp;
501
502 if (upper_32_bits(offset) || upper_32_bits(offset + length))
503 return afs_fs_fetch_data64(server, key, vnode, offset, length,
504 buffer, wait_mode);
505
506 _enter("");
507
508 call = afs_alloc_flat_call(&afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
509 if (!call)
510 return -ENOMEM;
511
512 call->key = key;
513 call->reply = vnode;
514 call->reply2 = NULL; /* volsync */
515 call->reply3 = buffer;
516 call->service_id = FS_SERVICE;
517 call->port = htons(AFS_FS_PORT);
518 call->operation_ID = FSFETCHDATA;
519
520 /* marshall the parameters */
521 bp = call->request;
522 bp[0] = htonl(FSFETCHDATA);
523 bp[1] = htonl(vnode->fid.vid);
524 bp[2] = htonl(vnode->fid.vnode);
525 bp[3] = htonl(vnode->fid.unique);
526 bp[4] = htonl(offset);
527 bp[5] = htonl(length);
528
529 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
530 }
531
532 /*
533 * deliver reply data to an FS.GiveUpCallBacks
534 */
535 static int afs_deliver_fs_give_up_callbacks(struct afs_call *call,
536 struct sk_buff *skb, bool last)
537 {
538 _enter(",{%u},%d", skb->len, last);
539
540 if (skb->len > 0)
541 return -EBADMSG; /* shouldn't be any reply data */
542 return 0;
543 }
544
545 /*
546 * FS.GiveUpCallBacks operation type
547 */
548 static const struct afs_call_type afs_RXFSGiveUpCallBacks = {
549 .name = "FS.GiveUpCallBacks",
550 .deliver = afs_deliver_fs_give_up_callbacks,
551 .abort_to_error = afs_abort_to_error,
552 .destructor = afs_flat_call_destructor,
553 };
554
555 /*
556 * give up a set of callbacks
557 * - the callbacks are held in the server->cb_break ring
558 */
559 int afs_fs_give_up_callbacks(struct afs_server *server,
560 const struct afs_wait_mode *wait_mode)
561 {
562 struct afs_call *call;
563 size_t ncallbacks;
564 __be32 *bp, *tp;
565 int loop;
566
567 ncallbacks = CIRC_CNT(server->cb_break_head, server->cb_break_tail,
568 ARRAY_SIZE(server->cb_break));
569
570 _enter("{%zu},", ncallbacks);
571
572 if (ncallbacks == 0)
573 return 0;
574 if (ncallbacks > AFSCBMAX)
575 ncallbacks = AFSCBMAX;
576
577 _debug("break %zu callbacks", ncallbacks);
578
579 call = afs_alloc_flat_call(&afs_RXFSGiveUpCallBacks,
580 12 + ncallbacks * 6 * 4, 0);
581 if (!call)
582 return -ENOMEM;
583
584 call->service_id = FS_SERVICE;
585 call->port = htons(AFS_FS_PORT);
586
587 /* marshall the parameters */
588 bp = call->request;
589 tp = bp + 2 + ncallbacks * 3;
590 *bp++ = htonl(FSGIVEUPCALLBACKS);
591 *bp++ = htonl(ncallbacks);
592 *tp++ = htonl(ncallbacks);
593
594 atomic_sub(ncallbacks, &server->cb_break_n);
595 for (loop = ncallbacks; loop > 0; loop--) {
596 struct afs_callback *cb =
597 &server->cb_break[server->cb_break_tail];
598
599 *bp++ = htonl(cb->fid.vid);
600 *bp++ = htonl(cb->fid.vnode);
601 *bp++ = htonl(cb->fid.unique);
602 *tp++ = htonl(cb->version);
603 *tp++ = htonl(cb->expiry);
604 *tp++ = htonl(cb->type);
605 smp_mb();
606 server->cb_break_tail =
607 (server->cb_break_tail + 1) &
608 (ARRAY_SIZE(server->cb_break) - 1);
609 }
610
611 ASSERT(ncallbacks > 0);
612 wake_up_nr(&server->cb_break_waitq, ncallbacks);
613
614 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
615 }
616
617 /*
618 * deliver reply data to an FS.CreateFile or an FS.MakeDir
619 */
620 static int afs_deliver_fs_create_vnode(struct afs_call *call,
621 struct sk_buff *skb, bool last)
622 {
623 struct afs_vnode *vnode = call->reply;
624 const __be32 *bp;
625
626 _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
627
628 afs_transfer_reply(call, skb);
629 if (!last)
630 return 0;
631
632 if (call->reply_size != call->reply_max)
633 return -EBADMSG;
634
635 /* unmarshall the reply once we've received all of it */
636 bp = call->buffer;
637 xdr_decode_AFSFid(&bp, call->reply2);
638 xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL, NULL);
639 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
640 xdr_decode_AFSCallBack_raw(&bp, call->reply4);
641 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
642
643 _leave(" = 0 [done]");
644 return 0;
645 }
646
647 /*
648 * FS.CreateFile and FS.MakeDir operation type
649 */
650 static const struct afs_call_type afs_RXFSCreateXXXX = {
651 .name = "FS.CreateXXXX",
652 .deliver = afs_deliver_fs_create_vnode,
653 .abort_to_error = afs_abort_to_error,
654 .destructor = afs_flat_call_destructor,
655 };
656
657 /*
658 * create a file or make a directory
659 */
660 int afs_fs_create(struct afs_server *server,
661 struct key *key,
662 struct afs_vnode *vnode,
663 const char *name,
664 umode_t mode,
665 struct afs_fid *newfid,
666 struct afs_file_status *newstatus,
667 struct afs_callback *newcb,
668 const struct afs_wait_mode *wait_mode)
669 {
670 struct afs_call *call;
671 size_t namesz, reqsz, padsz;
672 __be32 *bp;
673
674 _enter("");
675
676 namesz = strlen(name);
677 padsz = (4 - (namesz & 3)) & 3;
678 reqsz = (5 * 4) + namesz + padsz + (6 * 4);
679
680 call = afs_alloc_flat_call(&afs_RXFSCreateXXXX, reqsz,
681 (3 + 21 + 21 + 3 + 6) * 4);
682 if (!call)
683 return -ENOMEM;
684
685 call->key = key;
686 call->reply = vnode;
687 call->reply2 = newfid;
688 call->reply3 = newstatus;
689 call->reply4 = newcb;
690 call->service_id = FS_SERVICE;
691 call->port = htons(AFS_FS_PORT);
692
693 /* marshall the parameters */
694 bp = call->request;
695 *bp++ = htonl(S_ISDIR(mode) ? FSMAKEDIR : FSCREATEFILE);
696 *bp++ = htonl(vnode->fid.vid);
697 *bp++ = htonl(vnode->fid.vnode);
698 *bp++ = htonl(vnode->fid.unique);
699 *bp++ = htonl(namesz);
700 memcpy(bp, name, namesz);
701 bp = (void *) bp + namesz;
702 if (padsz > 0) {
703 memset(bp, 0, padsz);
704 bp = (void *) bp + padsz;
705 }
706 *bp++ = htonl(AFS_SET_MODE);
707 *bp++ = 0; /* mtime */
708 *bp++ = 0; /* owner */
709 *bp++ = 0; /* group */
710 *bp++ = htonl(mode & S_IALLUGO); /* unix mode */
711 *bp++ = 0; /* segment size */
712
713 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
714 }
715
716 /*
717 * deliver reply data to an FS.RemoveFile or FS.RemoveDir
718 */
719 static int afs_deliver_fs_remove(struct afs_call *call,
720 struct sk_buff *skb, bool last)
721 {
722 struct afs_vnode *vnode = call->reply;
723 const __be32 *bp;
724
725 _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
726
727 afs_transfer_reply(call, skb);
728 if (!last)
729 return 0;
730
731 if (call->reply_size != call->reply_max)
732 return -EBADMSG;
733
734 /* unmarshall the reply once we've received all of it */
735 bp = call->buffer;
736 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
737 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
738
739 _leave(" = 0 [done]");
740 return 0;
741 }
742
743 /*
744 * FS.RemoveDir/FS.RemoveFile operation type
745 */
746 static const struct afs_call_type afs_RXFSRemoveXXXX = {
747 .name = "FS.RemoveXXXX",
748 .deliver = afs_deliver_fs_remove,
749 .abort_to_error = afs_abort_to_error,
750 .destructor = afs_flat_call_destructor,
751 };
752
753 /*
754 * remove a file or directory
755 */
756 int afs_fs_remove(struct afs_server *server,
757 struct key *key,
758 struct afs_vnode *vnode,
759 const char *name,
760 bool isdir,
761 const struct afs_wait_mode *wait_mode)
762 {
763 struct afs_call *call;
764 size_t namesz, reqsz, padsz;
765 __be32 *bp;
766
767 _enter("");
768
769 namesz = strlen(name);
770 padsz = (4 - (namesz & 3)) & 3;
771 reqsz = (5 * 4) + namesz + padsz;
772
773 call = afs_alloc_flat_call(&afs_RXFSRemoveXXXX, reqsz, (21 + 6) * 4);
774 if (!call)
775 return -ENOMEM;
776
777 call->key = key;
778 call->reply = vnode;
779 call->service_id = FS_SERVICE;
780 call->port = htons(AFS_FS_PORT);
781
782 /* marshall the parameters */
783 bp = call->request;
784 *bp++ = htonl(isdir ? FSREMOVEDIR : FSREMOVEFILE);
785 *bp++ = htonl(vnode->fid.vid);
786 *bp++ = htonl(vnode->fid.vnode);
787 *bp++ = htonl(vnode->fid.unique);
788 *bp++ = htonl(namesz);
789 memcpy(bp, name, namesz);
790 bp = (void *) bp + namesz;
791 if (padsz > 0) {
792 memset(bp, 0, padsz);
793 bp = (void *) bp + padsz;
794 }
795
796 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
797 }
798
799 /*
800 * deliver reply data to an FS.Link
801 */
802 static int afs_deliver_fs_link(struct afs_call *call,
803 struct sk_buff *skb, bool last)
804 {
805 struct afs_vnode *dvnode = call->reply, *vnode = call->reply2;
806 const __be32 *bp;
807
808 _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
809
810 afs_transfer_reply(call, skb);
811 if (!last)
812 return 0;
813
814 if (call->reply_size != call->reply_max)
815 return -EBADMSG;
816
817 /* unmarshall the reply once we've received all of it */
818 bp = call->buffer;
819 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
820 xdr_decode_AFSFetchStatus(&bp, &dvnode->status, dvnode, NULL);
821 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
822
823 _leave(" = 0 [done]");
824 return 0;
825 }
826
827 /*
828 * FS.Link operation type
829 */
830 static const struct afs_call_type afs_RXFSLink = {
831 .name = "FS.Link",
832 .deliver = afs_deliver_fs_link,
833 .abort_to_error = afs_abort_to_error,
834 .destructor = afs_flat_call_destructor,
835 };
836
837 /*
838 * make a hard link
839 */
840 int afs_fs_link(struct afs_server *server,
841 struct key *key,
842 struct afs_vnode *dvnode,
843 struct afs_vnode *vnode,
844 const char *name,
845 const struct afs_wait_mode *wait_mode)
846 {
847 struct afs_call *call;
848 size_t namesz, reqsz, padsz;
849 __be32 *bp;
850
851 _enter("");
852
853 namesz = strlen(name);
854 padsz = (4 - (namesz & 3)) & 3;
855 reqsz = (5 * 4) + namesz + padsz + (3 * 4);
856
857 call = afs_alloc_flat_call(&afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
858 if (!call)
859 return -ENOMEM;
860
861 call->key = key;
862 call->reply = dvnode;
863 call->reply2 = vnode;
864 call->service_id = FS_SERVICE;
865 call->port = htons(AFS_FS_PORT);
866
867 /* marshall the parameters */
868 bp = call->request;
869 *bp++ = htonl(FSLINK);
870 *bp++ = htonl(dvnode->fid.vid);
871 *bp++ = htonl(dvnode->fid.vnode);
872 *bp++ = htonl(dvnode->fid.unique);
873 *bp++ = htonl(namesz);
874 memcpy(bp, name, namesz);
875 bp = (void *) bp + namesz;
876 if (padsz > 0) {
877 memset(bp, 0, padsz);
878 bp = (void *) bp + padsz;
879 }
880 *bp++ = htonl(vnode->fid.vid);
881 *bp++ = htonl(vnode->fid.vnode);
882 *bp++ = htonl(vnode->fid.unique);
883
884 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
885 }
886
887 /*
888 * deliver reply data to an FS.Symlink
889 */
890 static int afs_deliver_fs_symlink(struct afs_call *call,
891 struct sk_buff *skb, bool last)
892 {
893 struct afs_vnode *vnode = call->reply;
894 const __be32 *bp;
895
896 _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
897
898 afs_transfer_reply(call, skb);
899 if (!last)
900 return 0;
901
902 if (call->reply_size != call->reply_max)
903 return -EBADMSG;
904
905 /* unmarshall the reply once we've received all of it */
906 bp = call->buffer;
907 xdr_decode_AFSFid(&bp, call->reply2);
908 xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL, NULL);
909 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
910 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
911
912 _leave(" = 0 [done]");
913 return 0;
914 }
915
916 /*
917 * FS.Symlink operation type
918 */
919 static const struct afs_call_type afs_RXFSSymlink = {
920 .name = "FS.Symlink",
921 .deliver = afs_deliver_fs_symlink,
922 .abort_to_error = afs_abort_to_error,
923 .destructor = afs_flat_call_destructor,
924 };
925
926 /*
927 * create a symbolic link
928 */
929 int afs_fs_symlink(struct afs_server *server,
930 struct key *key,
931 struct afs_vnode *vnode,
932 const char *name,
933 const char *contents,
934 struct afs_fid *newfid,
935 struct afs_file_status *newstatus,
936 const struct afs_wait_mode *wait_mode)
937 {
938 struct afs_call *call;
939 size_t namesz, reqsz, padsz, c_namesz, c_padsz;
940 __be32 *bp;
941
942 _enter("");
943
944 namesz = strlen(name);
945 padsz = (4 - (namesz & 3)) & 3;
946
947 c_namesz = strlen(contents);
948 c_padsz = (4 - (c_namesz & 3)) & 3;
949
950 reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4);
951
952 call = afs_alloc_flat_call(&afs_RXFSSymlink, reqsz,
953 (3 + 21 + 21 + 6) * 4);
954 if (!call)
955 return -ENOMEM;
956
957 call->key = key;
958 call->reply = vnode;
959 call->reply2 = newfid;
960 call->reply3 = newstatus;
961 call->service_id = FS_SERVICE;
962 call->port = htons(AFS_FS_PORT);
963
964 /* marshall the parameters */
965 bp = call->request;
966 *bp++ = htonl(FSSYMLINK);
967 *bp++ = htonl(vnode->fid.vid);
968 *bp++ = htonl(vnode->fid.vnode);
969 *bp++ = htonl(vnode->fid.unique);
970 *bp++ = htonl(namesz);
971 memcpy(bp, name, namesz);
972 bp = (void *) bp + namesz;
973 if (padsz > 0) {
974 memset(bp, 0, padsz);
975 bp = (void *) bp + padsz;
976 }
977 *bp++ = htonl(c_namesz);
978 memcpy(bp, contents, c_namesz);
979 bp = (void *) bp + c_namesz;
980 if (c_padsz > 0) {
981 memset(bp, 0, c_padsz);
982 bp = (void *) bp + c_padsz;
983 }
984 *bp++ = htonl(AFS_SET_MODE);
985 *bp++ = 0; /* mtime */
986 *bp++ = 0; /* owner */
987 *bp++ = 0; /* group */
988 *bp++ = htonl(S_IRWXUGO); /* unix mode */
989 *bp++ = 0; /* segment size */
990
991 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
992 }
993
994 /*
995 * deliver reply data to an FS.Rename
996 */
997 static int afs_deliver_fs_rename(struct afs_call *call,
998 struct sk_buff *skb, bool last)
999 {
1000 struct afs_vnode *orig_dvnode = call->reply, *new_dvnode = call->reply2;
1001 const __be32 *bp;
1002
1003 _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
1004
1005 afs_transfer_reply(call, skb);
1006 if (!last)
1007 return 0;
1008
1009 if (call->reply_size != call->reply_max)
1010 return -EBADMSG;
1011
1012 /* unmarshall the reply once we've received all of it */
1013 bp = call->buffer;
1014 xdr_decode_AFSFetchStatus(&bp, &orig_dvnode->status, orig_dvnode, NULL);
1015 if (new_dvnode != orig_dvnode)
1016 xdr_decode_AFSFetchStatus(&bp, &new_dvnode->status, new_dvnode,
1017 NULL);
1018 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
1019
1020 _leave(" = 0 [done]");
1021 return 0;
1022 }
1023
1024 /*
1025 * FS.Rename operation type
1026 */
1027 static const struct afs_call_type afs_RXFSRename = {
1028 .name = "FS.Rename",
1029 .deliver = afs_deliver_fs_rename,
1030 .abort_to_error = afs_abort_to_error,
1031 .destructor = afs_flat_call_destructor,
1032 };
1033
1034 /*
1035 * create a symbolic link
1036 */
1037 int afs_fs_rename(struct afs_server *server,
1038 struct key *key,
1039 struct afs_vnode *orig_dvnode,
1040 const char *orig_name,
1041 struct afs_vnode *new_dvnode,
1042 const char *new_name,
1043 const struct afs_wait_mode *wait_mode)
1044 {
1045 struct afs_call *call;
1046 size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz;
1047 __be32 *bp;
1048
1049 _enter("");
1050
1051 o_namesz = strlen(orig_name);
1052 o_padsz = (4 - (o_namesz & 3)) & 3;
1053
1054 n_namesz = strlen(new_name);
1055 n_padsz = (4 - (n_namesz & 3)) & 3;
1056
1057 reqsz = (4 * 4) +
1058 4 + o_namesz + o_padsz +
1059 (3 * 4) +
1060 4 + n_namesz + n_padsz;
1061
1062 call = afs_alloc_flat_call(&afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
1063 if (!call)
1064 return -ENOMEM;
1065
1066 call->key = key;
1067 call->reply = orig_dvnode;
1068 call->reply2 = new_dvnode;
1069 call->service_id = FS_SERVICE;
1070 call->port = htons(AFS_FS_PORT);
1071
1072 /* marshall the parameters */
1073 bp = call->request;
1074 *bp++ = htonl(FSRENAME);
1075 *bp++ = htonl(orig_dvnode->fid.vid);
1076 *bp++ = htonl(orig_dvnode->fid.vnode);
1077 *bp++ = htonl(orig_dvnode->fid.unique);
1078 *bp++ = htonl(o_namesz);
1079 memcpy(bp, orig_name, o_namesz);
1080 bp = (void *) bp + o_namesz;
1081 if (o_padsz > 0) {
1082 memset(bp, 0, o_padsz);
1083 bp = (void *) bp + o_padsz;
1084 }
1085
1086 *bp++ = htonl(new_dvnode->fid.vid);
1087 *bp++ = htonl(new_dvnode->fid.vnode);
1088 *bp++ = htonl(new_dvnode->fid.unique);
1089 *bp++ = htonl(n_namesz);
1090 memcpy(bp, new_name, n_namesz);
1091 bp = (void *) bp + n_namesz;
1092 if (n_padsz > 0) {
1093 memset(bp, 0, n_padsz);
1094 bp = (void *) bp + n_padsz;
1095 }
1096
1097 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1098 }
1099
1100 /*
1101 * deliver reply data to an FS.StoreData
1102 */
1103 static int afs_deliver_fs_store_data(struct afs_call *call,
1104 struct sk_buff *skb, bool last)
1105 {
1106 struct afs_vnode *vnode = call->reply;
1107 const __be32 *bp;
1108
1109 _enter(",,%u", last);
1110
1111 afs_transfer_reply(call, skb);
1112 if (!last) {
1113 _leave(" = 0 [more]");
1114 return 0;
1115 }
1116
1117 if (call->reply_size != call->reply_max) {
1118 _leave(" = -EBADMSG [%u != %u]",
1119 call->reply_size, call->reply_max);
1120 return -EBADMSG;
1121 }
1122
1123 /* unmarshall the reply once we've received all of it */
1124 bp = call->buffer;
1125 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
1126 &call->store_version);
1127 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
1128
1129 afs_pages_written_back(vnode, call);
1130
1131 _leave(" = 0 [done]");
1132 return 0;
1133 }
1134
1135 /*
1136 * FS.StoreData operation type
1137 */
1138 static const struct afs_call_type afs_RXFSStoreData = {
1139 .name = "FS.StoreData",
1140 .deliver = afs_deliver_fs_store_data,
1141 .abort_to_error = afs_abort_to_error,
1142 .destructor = afs_flat_call_destructor,
1143 };
1144
1145 static const struct afs_call_type afs_RXFSStoreData64 = {
1146 .name = "FS.StoreData64",
1147 .deliver = afs_deliver_fs_store_data,
1148 .abort_to_error = afs_abort_to_error,
1149 .destructor = afs_flat_call_destructor,
1150 };
1151
1152 /*
1153 * store a set of pages to a very large file
1154 */
1155 static int afs_fs_store_data64(struct afs_server *server,
1156 struct afs_writeback *wb,
1157 pgoff_t first, pgoff_t last,
1158 unsigned offset, unsigned to,
1159 loff_t size, loff_t pos, loff_t i_size,
1160 const struct afs_wait_mode *wait_mode)
1161 {
1162 struct afs_vnode *vnode = wb->vnode;
1163 struct afs_call *call;
1164 __be32 *bp;
1165
1166 _enter(",%x,{%x:%u},,",
1167 key_serial(wb->key), vnode->fid.vid, vnode->fid.vnode);
1168
1169 call = afs_alloc_flat_call(&afs_RXFSStoreData64,
1170 (4 + 6 + 3 * 2) * 4,
1171 (21 + 6) * 4);
1172 if (!call)
1173 return -ENOMEM;
1174
1175 call->wb = wb;
1176 call->key = wb->key;
1177 call->reply = vnode;
1178 call->service_id = FS_SERVICE;
1179 call->port = htons(AFS_FS_PORT);
1180 call->mapping = vnode->vfs_inode.i_mapping;
1181 call->first = first;
1182 call->last = last;
1183 call->first_offset = offset;
1184 call->last_to = to;
1185 call->send_pages = true;
1186 call->store_version = vnode->status.data_version + 1;
1187
1188 /* marshall the parameters */
1189 bp = call->request;
1190 *bp++ = htonl(FSSTOREDATA64);
1191 *bp++ = htonl(vnode->fid.vid);
1192 *bp++ = htonl(vnode->fid.vnode);
1193 *bp++ = htonl(vnode->fid.unique);
1194
1195 *bp++ = 0; /* mask */
1196 *bp++ = 0; /* mtime */
1197 *bp++ = 0; /* owner */
1198 *bp++ = 0; /* group */
1199 *bp++ = 0; /* unix mode */
1200 *bp++ = 0; /* segment size */
1201
1202 *bp++ = htonl(pos >> 32);
1203 *bp++ = htonl((u32) pos);
1204 *bp++ = htonl(size >> 32);
1205 *bp++ = htonl((u32) size);
1206 *bp++ = htonl(i_size >> 32);
1207 *bp++ = htonl((u32) i_size);
1208
1209 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1210 }
1211
1212 /*
1213 * store a set of pages
1214 */
1215 int afs_fs_store_data(struct afs_server *server, struct afs_writeback *wb,
1216 pgoff_t first, pgoff_t last,
1217 unsigned offset, unsigned to,
1218 const struct afs_wait_mode *wait_mode)
1219 {
1220 struct afs_vnode *vnode = wb->vnode;
1221 struct afs_call *call;
1222 loff_t size, pos, i_size;
1223 __be32 *bp;
1224
1225 _enter(",%x,{%x:%u},,",
1226 key_serial(wb->key), vnode->fid.vid, vnode->fid.vnode);
1227
1228 size = to - offset;
1229 if (first != last)
1230 size += (loff_t)(last - first) << PAGE_SHIFT;
1231 pos = (loff_t)first << PAGE_SHIFT;
1232 pos += offset;
1233
1234 i_size = i_size_read(&vnode->vfs_inode);
1235 if (pos + size > i_size)
1236 i_size = size + pos;
1237
1238 _debug("size %llx, at %llx, i_size %llx",
1239 (unsigned long long) size, (unsigned long long) pos,
1240 (unsigned long long) i_size);
1241
1242 if (pos >> 32 || i_size >> 32 || size >> 32 || (pos + size) >> 32)
1243 return afs_fs_store_data64(server, wb, first, last, offset, to,
1244 size, pos, i_size, wait_mode);
1245
1246 call = afs_alloc_flat_call(&afs_RXFSStoreData,
1247 (4 + 6 + 3) * 4,
1248 (21 + 6) * 4);
1249 if (!call)
1250 return -ENOMEM;
1251
1252 call->wb = wb;
1253 call->key = wb->key;
1254 call->reply = vnode;
1255 call->service_id = FS_SERVICE;
1256 call->port = htons(AFS_FS_PORT);
1257 call->mapping = vnode->vfs_inode.i_mapping;
1258 call->first = first;
1259 call->last = last;
1260 call->first_offset = offset;
1261 call->last_to = to;
1262 call->send_pages = true;
1263 call->store_version = vnode->status.data_version + 1;
1264
1265 /* marshall the parameters */
1266 bp = call->request;
1267 *bp++ = htonl(FSSTOREDATA);
1268 *bp++ = htonl(vnode->fid.vid);
1269 *bp++ = htonl(vnode->fid.vnode);
1270 *bp++ = htonl(vnode->fid.unique);
1271
1272 *bp++ = 0; /* mask */
1273 *bp++ = 0; /* mtime */
1274 *bp++ = 0; /* owner */
1275 *bp++ = 0; /* group */
1276 *bp++ = 0; /* unix mode */
1277 *bp++ = 0; /* segment size */
1278
1279 *bp++ = htonl(pos);
1280 *bp++ = htonl(size);
1281 *bp++ = htonl(i_size);
1282
1283 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1284 }
1285
1286 /*
1287 * deliver reply data to an FS.StoreStatus
1288 */
1289 static int afs_deliver_fs_store_status(struct afs_call *call,
1290 struct sk_buff *skb, bool last)
1291 {
1292 afs_dataversion_t *store_version;
1293 struct afs_vnode *vnode = call->reply;
1294 const __be32 *bp;
1295
1296 _enter(",,%u", last);
1297
1298 afs_transfer_reply(call, skb);
1299 if (!last) {
1300 _leave(" = 0 [more]");
1301 return 0;
1302 }
1303
1304 if (call->reply_size != call->reply_max) {
1305 _leave(" = -EBADMSG [%u != %u]",
1306 call->reply_size, call->reply_max);
1307 return -EBADMSG;
1308 }
1309
1310 /* unmarshall the reply once we've received all of it */
1311 store_version = NULL;
1312 if (call->operation_ID == FSSTOREDATA)
1313 store_version = &call->store_version;
1314
1315 bp = call->buffer;
1316 xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, store_version);
1317 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
1318
1319 _leave(" = 0 [done]");
1320 return 0;
1321 }
1322
1323 /*
1324 * FS.StoreStatus operation type
1325 */
1326 static const struct afs_call_type afs_RXFSStoreStatus = {
1327 .name = "FS.StoreStatus",
1328 .deliver = afs_deliver_fs_store_status,
1329 .abort_to_error = afs_abort_to_error,
1330 .destructor = afs_flat_call_destructor,
1331 };
1332
1333 static const struct afs_call_type afs_RXFSStoreData_as_Status = {
1334 .name = "FS.StoreData",
1335 .deliver = afs_deliver_fs_store_status,
1336 .abort_to_error = afs_abort_to_error,
1337 .destructor = afs_flat_call_destructor,
1338 };
1339
1340 static const struct afs_call_type afs_RXFSStoreData64_as_Status = {
1341 .name = "FS.StoreData64",
1342 .deliver = afs_deliver_fs_store_status,
1343 .abort_to_error = afs_abort_to_error,
1344 .destructor = afs_flat_call_destructor,
1345 };
1346
1347 /*
1348 * set the attributes on a very large file, using FS.StoreData rather than
1349 * FS.StoreStatus so as to alter the file size also
1350 */
1351 static int afs_fs_setattr_size64(struct afs_server *server, struct key *key,
1352 struct afs_vnode *vnode, struct iattr *attr,
1353 const struct afs_wait_mode *wait_mode)
1354 {
1355 struct afs_call *call;
1356 __be32 *bp;
1357
1358 _enter(",%x,{%x:%u},,",
1359 key_serial(key), vnode->fid.vid, vnode->fid.vnode);
1360
1361 ASSERT(attr->ia_valid & ATTR_SIZE);
1362
1363 call = afs_alloc_flat_call(&afs_RXFSStoreData64_as_Status,
1364 (4 + 6 + 3 * 2) * 4,
1365 (21 + 6) * 4);
1366 if (!call)
1367 return -ENOMEM;
1368
1369 call->key = key;
1370 call->reply = vnode;
1371 call->service_id = FS_SERVICE;
1372 call->port = htons(AFS_FS_PORT);
1373 call->store_version = vnode->status.data_version + 1;
1374 call->operation_ID = FSSTOREDATA;
1375
1376 /* marshall the parameters */
1377 bp = call->request;
1378 *bp++ = htonl(FSSTOREDATA64);
1379 *bp++ = htonl(vnode->fid.vid);
1380 *bp++ = htonl(vnode->fid.vnode);
1381 *bp++ = htonl(vnode->fid.unique);
1382
1383 xdr_encode_AFS_StoreStatus(&bp, attr);
1384
1385 *bp++ = 0; /* position of start of write */
1386 *bp++ = 0;
1387 *bp++ = 0; /* size of write */
1388 *bp++ = 0;
1389 *bp++ = htonl(attr->ia_size >> 32); /* new file length */
1390 *bp++ = htonl((u32) attr->ia_size);
1391
1392 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1393 }
1394
1395 /*
1396 * set the attributes on a file, using FS.StoreData rather than FS.StoreStatus
1397 * so as to alter the file size also
1398 */
1399 static int afs_fs_setattr_size(struct afs_server *server, struct key *key,
1400 struct afs_vnode *vnode, struct iattr *attr,
1401 const struct afs_wait_mode *wait_mode)
1402 {
1403 struct afs_call *call;
1404 __be32 *bp;
1405
1406 _enter(",%x,{%x:%u},,",
1407 key_serial(key), vnode->fid.vid, vnode->fid.vnode);
1408
1409 ASSERT(attr->ia_valid & ATTR_SIZE);
1410 if (attr->ia_size >> 32)
1411 return afs_fs_setattr_size64(server, key, vnode, attr,
1412 wait_mode);
1413
1414 call = afs_alloc_flat_call(&afs_RXFSStoreData_as_Status,
1415 (4 + 6 + 3) * 4,
1416 (21 + 6) * 4);
1417 if (!call)
1418 return -ENOMEM;
1419
1420 call->key = key;
1421 call->reply = vnode;
1422 call->service_id = FS_SERVICE;
1423 call->port = htons(AFS_FS_PORT);
1424 call->store_version = vnode->status.data_version + 1;
1425 call->operation_ID = FSSTOREDATA;
1426
1427 /* marshall the parameters */
1428 bp = call->request;
1429 *bp++ = htonl(FSSTOREDATA);
1430 *bp++ = htonl(vnode->fid.vid);
1431 *bp++ = htonl(vnode->fid.vnode);
1432 *bp++ = htonl(vnode->fid.unique);
1433
1434 xdr_encode_AFS_StoreStatus(&bp, attr);
1435
1436 *bp++ = 0; /* position of start of write */
1437 *bp++ = 0; /* size of write */
1438 *bp++ = htonl(attr->ia_size); /* new file length */
1439
1440 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1441 }
1442
1443 /*
1444 * set the attributes on a file, using FS.StoreData if there's a change in file
1445 * size, and FS.StoreStatus otherwise
1446 */
1447 int afs_fs_setattr(struct afs_server *server, struct key *key,
1448 struct afs_vnode *vnode, struct iattr *attr,
1449 const struct afs_wait_mode *wait_mode)
1450 {
1451 struct afs_call *call;
1452 __be32 *bp;
1453
1454 if (attr->ia_valid & ATTR_SIZE)
1455 return afs_fs_setattr_size(server, key, vnode, attr,
1456 wait_mode);
1457
1458 _enter(",%x,{%x:%u},,",
1459 key_serial(key), vnode->fid.vid, vnode->fid.vnode);
1460
1461 call = afs_alloc_flat_call(&afs_RXFSStoreStatus,
1462 (4 + 6) * 4,
1463 (21 + 6) * 4);
1464 if (!call)
1465 return -ENOMEM;
1466
1467 call->key = key;
1468 call->reply = vnode;
1469 call->service_id = FS_SERVICE;
1470 call->port = htons(AFS_FS_PORT);
1471 call->operation_ID = FSSTORESTATUS;
1472
1473 /* marshall the parameters */
1474 bp = call->request;
1475 *bp++ = htonl(FSSTORESTATUS);
1476 *bp++ = htonl(vnode->fid.vid);
1477 *bp++ = htonl(vnode->fid.vnode);
1478 *bp++ = htonl(vnode->fid.unique);
1479
1480 xdr_encode_AFS_StoreStatus(&bp, attr);
1481
1482 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1483 }
1484
1485 /*
1486 * deliver reply data to an FS.GetVolumeStatus
1487 */
1488 static int afs_deliver_fs_get_volume_status(struct afs_call *call,
1489 struct sk_buff *skb, bool last)
1490 {
1491 const __be32 *bp;
1492 char *p;
1493 int ret;
1494
1495 _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
1496
1497 switch (call->unmarshall) {
1498 case 0:
1499 call->offset = 0;
1500 call->unmarshall++;
1501
1502 /* extract the returned status record */
1503 case 1:
1504 _debug("extract status");
1505 ret = afs_extract_data(call, skb, last, call->buffer,
1506 12 * 4);
1507 switch (ret) {
1508 case 0: break;
1509 case -EAGAIN: return 0;
1510 default: return ret;
1511 }
1512
1513 bp = call->buffer;
1514 xdr_decode_AFSFetchVolumeStatus(&bp, call->reply2);
1515 call->offset = 0;
1516 call->unmarshall++;
1517
1518 /* extract the volume name length */
1519 case 2:
1520 ret = afs_extract_data(call, skb, last, &call->tmp, 4);
1521 switch (ret) {
1522 case 0: break;
1523 case -EAGAIN: return 0;
1524 default: return ret;
1525 }
1526
1527 call->count = ntohl(call->tmp);
1528 _debug("volname length: %u", call->count);
1529 if (call->count >= AFSNAMEMAX)
1530 return -EBADMSG;
1531 call->offset = 0;
1532 call->unmarshall++;
1533
1534 /* extract the volume name */
1535 case 3:
1536 _debug("extract volname");
1537 if (call->count > 0) {
1538 ret = afs_extract_data(call, skb, last, call->reply3,
1539 call->count);
1540 switch (ret) {
1541 case 0: break;
1542 case -EAGAIN: return 0;
1543 default: return ret;
1544 }
1545 }
1546
1547 p = call->reply3;
1548 p[call->count] = 0;
1549 _debug("volname '%s'", p);
1550
1551 call->offset = 0;
1552 call->unmarshall++;
1553
1554 /* extract the volume name padding */
1555 if ((call->count & 3) == 0) {
1556 call->unmarshall++;
1557 goto no_volname_padding;
1558 }
1559 call->count = 4 - (call->count & 3);
1560
1561 case 4:
1562 ret = afs_extract_data(call, skb, last, call->buffer,
1563 call->count);
1564 switch (ret) {
1565 case 0: break;
1566 case -EAGAIN: return 0;
1567 default: return ret;
1568 }
1569
1570 call->offset = 0;
1571 call->unmarshall++;
1572 no_volname_padding:
1573
1574 /* extract the offline message length */
1575 case 5:
1576 ret = afs_extract_data(call, skb, last, &call->tmp, 4);
1577 switch (ret) {
1578 case 0: break;
1579 case -EAGAIN: return 0;
1580 default: return ret;
1581 }
1582
1583 call->count = ntohl(call->tmp);
1584 _debug("offline msg length: %u", call->count);
1585 if (call->count >= AFSNAMEMAX)
1586 return -EBADMSG;
1587 call->offset = 0;
1588 call->unmarshall++;
1589
1590 /* extract the offline message */
1591 case 6:
1592 _debug("extract offline");
1593 if (call->count > 0) {
1594 ret = afs_extract_data(call, skb, last, call->reply3,
1595 call->count);
1596 switch (ret) {
1597 case 0: break;
1598 case -EAGAIN: return 0;
1599 default: return ret;
1600 }
1601 }
1602
1603 p = call->reply3;
1604 p[call->count] = 0;
1605 _debug("offline '%s'", p);
1606
1607 call->offset = 0;
1608 call->unmarshall++;
1609
1610 /* extract the offline message padding */
1611 if ((call->count & 3) == 0) {
1612 call->unmarshall++;
1613 goto no_offline_padding;
1614 }
1615 call->count = 4 - (call->count & 3);
1616
1617 case 7:
1618 ret = afs_extract_data(call, skb, last, call->buffer,
1619 call->count);
1620 switch (ret) {
1621 case 0: break;
1622 case -EAGAIN: return 0;
1623 default: return ret;
1624 }
1625
1626 call->offset = 0;
1627 call->unmarshall++;
1628 no_offline_padding:
1629
1630 /* extract the message of the day length */
1631 case 8:
1632 ret = afs_extract_data(call, skb, last, &call->tmp, 4);
1633 switch (ret) {
1634 case 0: break;
1635 case -EAGAIN: return 0;
1636 default: return ret;
1637 }
1638
1639 call->count = ntohl(call->tmp);
1640 _debug("motd length: %u", call->count);
1641 if (call->count >= AFSNAMEMAX)
1642 return -EBADMSG;
1643 call->offset = 0;
1644 call->unmarshall++;
1645
1646 /* extract the message of the day */
1647 case 9:
1648 _debug("extract motd");
1649 if (call->count > 0) {
1650 ret = afs_extract_data(call, skb, last, call->reply3,
1651 call->count);
1652 switch (ret) {
1653 case 0: break;
1654 case -EAGAIN: return 0;
1655 default: return ret;
1656 }
1657 }
1658
1659 p = call->reply3;
1660 p[call->count] = 0;
1661 _debug("motd '%s'", p);
1662
1663 call->offset = 0;
1664 call->unmarshall++;
1665
1666 /* extract the message of the day padding */
1667 if ((call->count & 3) == 0) {
1668 call->unmarshall++;
1669 goto no_motd_padding;
1670 }
1671 call->count = 4 - (call->count & 3);
1672
1673 case 10:
1674 ret = afs_extract_data(call, skb, last, call->buffer,
1675 call->count);
1676 switch (ret) {
1677 case 0: break;
1678 case -EAGAIN: return 0;
1679 default: return ret;
1680 }
1681
1682 call->offset = 0;
1683 call->unmarshall++;
1684 no_motd_padding:
1685
1686 case 11:
1687 _debug("trailer %d", skb->len);
1688 if (skb->len != 0)
1689 return -EBADMSG;
1690 break;
1691 }
1692
1693 if (!last)
1694 return 0;
1695
1696 _leave(" = 0 [done]");
1697 return 0;
1698 }
1699
1700 /*
1701 * destroy an FS.GetVolumeStatus call
1702 */
1703 static void afs_get_volume_status_call_destructor(struct afs_call *call)
1704 {
1705 kfree(call->reply3);
1706 call->reply3 = NULL;
1707 afs_flat_call_destructor(call);
1708 }
1709
1710 /*
1711 * FS.GetVolumeStatus operation type
1712 */
1713 static const struct afs_call_type afs_RXFSGetVolumeStatus = {
1714 .name = "FS.GetVolumeStatus",
1715 .deliver = afs_deliver_fs_get_volume_status,
1716 .abort_to_error = afs_abort_to_error,
1717 .destructor = afs_get_volume_status_call_destructor,
1718 };
1719
1720 /*
1721 * fetch the status of a volume
1722 */
1723 int afs_fs_get_volume_status(struct afs_server *server,
1724 struct key *key,
1725 struct afs_vnode *vnode,
1726 struct afs_volume_status *vs,
1727 const struct afs_wait_mode *wait_mode)
1728 {
1729 struct afs_call *call;
1730 __be32 *bp;
1731 void *tmpbuf;
1732
1733 _enter("");
1734
1735 tmpbuf = kmalloc(AFSOPAQUEMAX, GFP_KERNEL);
1736 if (!tmpbuf)
1737 return -ENOMEM;
1738
1739 call = afs_alloc_flat_call(&afs_RXFSGetVolumeStatus, 2 * 4, 12 * 4);
1740 if (!call) {
1741 kfree(tmpbuf);
1742 return -ENOMEM;
1743 }
1744
1745 call->key = key;
1746 call->reply = vnode;
1747 call->reply2 = vs;
1748 call->reply3 = tmpbuf;
1749 call->service_id = FS_SERVICE;
1750 call->port = htons(AFS_FS_PORT);
1751
1752 /* marshall the parameters */
1753 bp = call->request;
1754 bp[0] = htonl(FSGETVOLUMESTATUS);
1755 bp[1] = htonl(vnode->fid.vid);
1756
1757 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1758 }
1759
1760 /*
1761 * deliver reply data to an FS.SetLock, FS.ExtendLock or FS.ReleaseLock
1762 */
1763 static int afs_deliver_fs_xxxx_lock(struct afs_call *call,
1764 struct sk_buff *skb, bool last)
1765 {
1766 const __be32 *bp;
1767
1768 _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
1769
1770 afs_transfer_reply(call, skb);
1771 if (!last)
1772 return 0;
1773
1774 if (call->reply_size != call->reply_max)
1775 return -EBADMSG;
1776
1777 /* unmarshall the reply once we've received all of it */
1778 bp = call->buffer;
1779 /* xdr_decode_AFSVolSync(&bp, call->replyX); */
1780
1781 _leave(" = 0 [done]");
1782 return 0;
1783 }
1784
1785 /*
1786 * FS.SetLock operation type
1787 */
1788 static const struct afs_call_type afs_RXFSSetLock = {
1789 .name = "FS.SetLock",
1790 .deliver = afs_deliver_fs_xxxx_lock,
1791 .abort_to_error = afs_abort_to_error,
1792 .destructor = afs_flat_call_destructor,
1793 };
1794
1795 /*
1796 * FS.ExtendLock operation type
1797 */
1798 static const struct afs_call_type afs_RXFSExtendLock = {
1799 .name = "FS.ExtendLock",
1800 .deliver = afs_deliver_fs_xxxx_lock,
1801 .abort_to_error = afs_abort_to_error,
1802 .destructor = afs_flat_call_destructor,
1803 };
1804
1805 /*
1806 * FS.ReleaseLock operation type
1807 */
1808 static const struct afs_call_type afs_RXFSReleaseLock = {
1809 .name = "FS.ReleaseLock",
1810 .deliver = afs_deliver_fs_xxxx_lock,
1811 .abort_to_error = afs_abort_to_error,
1812 .destructor = afs_flat_call_destructor,
1813 };
1814
1815 /*
1816 * get a lock on a file
1817 */
1818 int afs_fs_set_lock(struct afs_server *server,
1819 struct key *key,
1820 struct afs_vnode *vnode,
1821 afs_lock_type_t type,
1822 const struct afs_wait_mode *wait_mode)
1823 {
1824 struct afs_call *call;
1825 __be32 *bp;
1826
1827 _enter("");
1828
1829 call = afs_alloc_flat_call(&afs_RXFSSetLock, 5 * 4, 6 * 4);
1830 if (!call)
1831 return -ENOMEM;
1832
1833 call->key = key;
1834 call->reply = vnode;
1835 call->service_id = FS_SERVICE;
1836 call->port = htons(AFS_FS_PORT);
1837
1838 /* marshall the parameters */
1839 bp = call->request;
1840 *bp++ = htonl(FSSETLOCK);
1841 *bp++ = htonl(vnode->fid.vid);
1842 *bp++ = htonl(vnode->fid.vnode);
1843 *bp++ = htonl(vnode->fid.unique);
1844 *bp++ = htonl(type);
1845
1846 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1847 }
1848
1849 /*
1850 * extend a lock on a file
1851 */
1852 int afs_fs_extend_lock(struct afs_server *server,
1853 struct key *key,
1854 struct afs_vnode *vnode,
1855 const struct afs_wait_mode *wait_mode)
1856 {
1857 struct afs_call *call;
1858 __be32 *bp;
1859
1860 _enter("");
1861
1862 call = afs_alloc_flat_call(&afs_RXFSExtendLock, 4 * 4, 6 * 4);
1863 if (!call)
1864 return -ENOMEM;
1865
1866 call->key = key;
1867 call->reply = vnode;
1868 call->service_id = FS_SERVICE;
1869 call->port = htons(AFS_FS_PORT);
1870
1871 /* marshall the parameters */
1872 bp = call->request;
1873 *bp++ = htonl(FSEXTENDLOCK);
1874 *bp++ = htonl(vnode->fid.vid);
1875 *bp++ = htonl(vnode->fid.vnode);
1876 *bp++ = htonl(vnode->fid.unique);
1877
1878 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1879 }
1880
1881 /*
1882 * release a lock on a file
1883 */
1884 int afs_fs_release_lock(struct afs_server *server,
1885 struct key *key,
1886 struct afs_vnode *vnode,
1887 const struct afs_wait_mode *wait_mode)
1888 {
1889 struct afs_call *call;
1890 __be32 *bp;
1891
1892 _enter("");
1893
1894 call = afs_alloc_flat_call(&afs_RXFSReleaseLock, 4 * 4, 6 * 4);
1895 if (!call)
1896 return -ENOMEM;
1897
1898 call->key = key;
1899 call->reply = vnode;
1900 call->service_id = FS_SERVICE;
1901 call->port = htons(AFS_FS_PORT);
1902
1903 /* marshall the parameters */
1904 bp = call->request;
1905 *bp++ = htonl(FSRELEASELOCK);
1906 *bp++ = htonl(vnode->fid.vid);
1907 *bp++ = htonl(vnode->fid.vnode);
1908 *bp++ = htonl(vnode->fid.unique);
1909
1910 return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
1911 }
Linux with added FPC-III support