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Merge tag 'io_uring-5.7-2020-05-22' of git://git.kernel.dk/linux-block
[thirdparty/linux.git] / fs / afs / yfsclient.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* YFS File Server client stubs
3 *
4 * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8 #include <linux/init.h>
9 #include <linux/slab.h>
10 #include <linux/sched.h>
11 #include <linux/circ_buf.h>
12 #include <linux/iversion.h>
13 #include "internal.h"
14 #include "afs_fs.h"
15 #include "xdr_fs.h"
16 #include "protocol_yfs.h"
17
18 static const struct afs_fid afs_zero_fid;
19
20 static inline void afs_use_fs_server(struct afs_call *call, struct afs_cb_interest *cbi)
21 {
22 call->cbi = afs_get_cb_interest(cbi);
23 }
24
25 #define xdr_size(x) (sizeof(*x) / sizeof(__be32))
26
27 static void xdr_decode_YFSFid(const __be32 **_bp, struct afs_fid *fid)
28 {
29 const struct yfs_xdr_YFSFid *x = (const void *)*_bp;
30
31 fid->vid = xdr_to_u64(x->volume);
32 fid->vnode = xdr_to_u64(x->vnode.lo);
33 fid->vnode_hi = ntohl(x->vnode.hi);
34 fid->unique = ntohl(x->vnode.unique);
35 *_bp += xdr_size(x);
36 }
37
38 static __be32 *xdr_encode_u32(__be32 *bp, u32 n)
39 {
40 *bp++ = htonl(n);
41 return bp;
42 }
43
44 static __be32 *xdr_encode_u64(__be32 *bp, u64 n)
45 {
46 struct yfs_xdr_u64 *x = (void *)bp;
47
48 *x = u64_to_xdr(n);
49 return bp + xdr_size(x);
50 }
51
52 static __be32 *xdr_encode_YFSFid(__be32 *bp, struct afs_fid *fid)
53 {
54 struct yfs_xdr_YFSFid *x = (void *)bp;
55
56 x->volume = u64_to_xdr(fid->vid);
57 x->vnode.lo = u64_to_xdr(fid->vnode);
58 x->vnode.hi = htonl(fid->vnode_hi);
59 x->vnode.unique = htonl(fid->unique);
60 return bp + xdr_size(x);
61 }
62
63 static size_t xdr_strlen(unsigned int len)
64 {
65 return sizeof(__be32) + round_up(len, sizeof(__be32));
66 }
67
68 static __be32 *xdr_encode_string(__be32 *bp, const char *p, unsigned int len)
69 {
70 bp = xdr_encode_u32(bp, len);
71 bp = memcpy(bp, p, len);
72 if (len & 3) {
73 unsigned int pad = 4 - (len & 3);
74
75 memset((u8 *)bp + len, 0, pad);
76 len += pad;
77 }
78
79 return bp + len / sizeof(__be32);
80 }
81
82 static s64 linux_to_yfs_time(const struct timespec64 *t)
83 {
84 /* Convert to 100ns intervals. */
85 return (u64)t->tv_sec * 10000000 + t->tv_nsec/100;
86 }
87
88 static __be32 *xdr_encode_YFSStoreStatus_mode(__be32 *bp, mode_t mode)
89 {
90 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
91
92 x->mask = htonl(AFS_SET_MODE);
93 x->mode = htonl(mode & S_IALLUGO);
94 x->mtime_client = u64_to_xdr(0);
95 x->owner = u64_to_xdr(0);
96 x->group = u64_to_xdr(0);
97 return bp + xdr_size(x);
98 }
99
100 static __be32 *xdr_encode_YFSStoreStatus_mtime(__be32 *bp, const struct timespec64 *t)
101 {
102 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
103 s64 mtime = linux_to_yfs_time(t);
104
105 x->mask = htonl(AFS_SET_MTIME);
106 x->mode = htonl(0);
107 x->mtime_client = u64_to_xdr(mtime);
108 x->owner = u64_to_xdr(0);
109 x->group = u64_to_xdr(0);
110 return bp + xdr_size(x);
111 }
112
113 /*
114 * Convert a signed 100ns-resolution 64-bit time into a timespec.
115 */
116 static struct timespec64 yfs_time_to_linux(s64 t)
117 {
118 struct timespec64 ts;
119 u64 abs_t;
120
121 /*
122 * Unfortunately can not use normal 64 bit division on 32 bit arch, but
123 * the alternative, do_div, does not work with negative numbers so have
124 * to special case them
125 */
126 if (t < 0) {
127 abs_t = -t;
128 ts.tv_nsec = (time64_t)(do_div(abs_t, 10000000) * 100);
129 ts.tv_nsec = -ts.tv_nsec;
130 ts.tv_sec = -abs_t;
131 } else {
132 abs_t = t;
133 ts.tv_nsec = (time64_t)do_div(abs_t, 10000000) * 100;
134 ts.tv_sec = abs_t;
135 }
136
137 return ts;
138 }
139
140 static struct timespec64 xdr_to_time(const struct yfs_xdr_u64 xdr)
141 {
142 s64 t = xdr_to_u64(xdr);
143
144 return yfs_time_to_linux(t);
145 }
146
147 static void yfs_check_req(struct afs_call *call, __be32 *bp)
148 {
149 size_t len = (void *)bp - call->request;
150
151 if (len > call->request_size)
152 pr_err("kAFS: %s: Request buffer overflow (%zu>%u)\n",
153 call->type->name, len, call->request_size);
154 else if (len < call->request_size)
155 pr_warn("kAFS: %s: Request buffer underflow (%zu<%u)\n",
156 call->type->name, len, call->request_size);
157 }
158
159 /*
160 * Dump a bad file status record.
161 */
162 static void xdr_dump_bad(const __be32 *bp)
163 {
164 __be32 x[4];
165 int i;
166
167 pr_notice("YFS XDR: Bad status record\n");
168 for (i = 0; i < 6 * 4 * 4; i += 16) {
169 memcpy(x, bp, 16);
170 bp += 4;
171 pr_notice("%03x: %08x %08x %08x %08x\n",
172 i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
173 }
174
175 memcpy(x, bp, 8);
176 pr_notice("0x60: %08x %08x\n", ntohl(x[0]), ntohl(x[1]));
177 }
178
179 /*
180 * Decode a YFSFetchStatus block
181 */
182 static int xdr_decode_YFSFetchStatus(const __be32 **_bp,
183 struct afs_call *call,
184 struct afs_status_cb *scb)
185 {
186 const struct yfs_xdr_YFSFetchStatus *xdr = (const void *)*_bp;
187 struct afs_file_status *status = &scb->status;
188 u32 type;
189 int ret;
190
191 status->abort_code = ntohl(xdr->abort_code);
192 if (status->abort_code != 0) {
193 if (status->abort_code == VNOVNODE)
194 status->nlink = 0;
195 scb->have_error = true;
196 goto good;
197 }
198
199 type = ntohl(xdr->type);
200 switch (type) {
201 case AFS_FTYPE_FILE:
202 case AFS_FTYPE_DIR:
203 case AFS_FTYPE_SYMLINK:
204 status->type = type;
205 break;
206 default:
207 goto bad;
208 }
209
210 status->nlink = ntohl(xdr->nlink);
211 status->author = xdr_to_u64(xdr->author);
212 status->owner = xdr_to_u64(xdr->owner);
213 status->caller_access = ntohl(xdr->caller_access); /* Ticket dependent */
214 status->anon_access = ntohl(xdr->anon_access);
215 status->mode = ntohl(xdr->mode) & S_IALLUGO;
216 status->group = xdr_to_u64(xdr->group);
217 status->lock_count = ntohl(xdr->lock_count);
218
219 status->mtime_client = xdr_to_time(xdr->mtime_client);
220 status->mtime_server = xdr_to_time(xdr->mtime_server);
221 status->size = xdr_to_u64(xdr->size);
222 status->data_version = xdr_to_u64(xdr->data_version);
223 scb->have_status = true;
224 good:
225 ret = 0;
226 advance:
227 *_bp += xdr_size(xdr);
228 return ret;
229
230 bad:
231 xdr_dump_bad(*_bp);
232 ret = afs_protocol_error(call, -EBADMSG, afs_eproto_bad_status);
233 goto advance;
234 }
235
236 /*
237 * Decode a YFSCallBack block
238 */
239 static void xdr_decode_YFSCallBack(const __be32 **_bp,
240 struct afs_call *call,
241 struct afs_status_cb *scb)
242 {
243 struct yfs_xdr_YFSCallBack *x = (void *)*_bp;
244 struct afs_callback *cb = &scb->callback;
245 ktime_t cb_expiry;
246
247 cb_expiry = call->reply_time;
248 cb_expiry = ktime_add(cb_expiry, xdr_to_u64(x->expiration_time) * 100);
249 cb->expires_at = ktime_divns(cb_expiry, NSEC_PER_SEC);
250 scb->have_cb = true;
251 *_bp += xdr_size(x);
252 }
253
254 /*
255 * Decode a YFSVolSync block
256 */
257 static void xdr_decode_YFSVolSync(const __be32 **_bp,
258 struct afs_volsync *volsync)
259 {
260 struct yfs_xdr_YFSVolSync *x = (void *)*_bp;
261 u64 creation;
262
263 if (volsync) {
264 creation = xdr_to_u64(x->vol_creation_date);
265 do_div(creation, 10 * 1000 * 1000);
266 volsync->creation = creation;
267 }
268
269 *_bp += xdr_size(x);
270 }
271
272 /*
273 * Encode the requested attributes into a YFSStoreStatus block
274 */
275 static __be32 *xdr_encode_YFS_StoreStatus(__be32 *bp, struct iattr *attr)
276 {
277 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
278 s64 mtime = 0, owner = 0, group = 0;
279 u32 mask = 0, mode = 0;
280
281 mask = 0;
282 if (attr->ia_valid & ATTR_MTIME) {
283 mask |= AFS_SET_MTIME;
284 mtime = linux_to_yfs_time(&attr->ia_mtime);
285 }
286
287 if (attr->ia_valid & ATTR_UID) {
288 mask |= AFS_SET_OWNER;
289 owner = from_kuid(&init_user_ns, attr->ia_uid);
290 }
291
292 if (attr->ia_valid & ATTR_GID) {
293 mask |= AFS_SET_GROUP;
294 group = from_kgid(&init_user_ns, attr->ia_gid);
295 }
296
297 if (attr->ia_valid & ATTR_MODE) {
298 mask |= AFS_SET_MODE;
299 mode = attr->ia_mode & S_IALLUGO;
300 }
301
302 x->mask = htonl(mask);
303 x->mode = htonl(mode);
304 x->mtime_client = u64_to_xdr(mtime);
305 x->owner = u64_to_xdr(owner);
306 x->group = u64_to_xdr(group);
307 return bp + xdr_size(x);
308 }
309
310 /*
311 * Decode a YFSFetchVolumeStatus block.
312 */
313 static void xdr_decode_YFSFetchVolumeStatus(const __be32 **_bp,
314 struct afs_volume_status *vs)
315 {
316 const struct yfs_xdr_YFSFetchVolumeStatus *x = (const void *)*_bp;
317 u32 flags;
318
319 vs->vid = xdr_to_u64(x->vid);
320 vs->parent_id = xdr_to_u64(x->parent_id);
321 flags = ntohl(x->flags);
322 vs->online = flags & yfs_FVSOnline;
323 vs->in_service = flags & yfs_FVSInservice;
324 vs->blessed = flags & yfs_FVSBlessed;
325 vs->needs_salvage = flags & yfs_FVSNeedsSalvage;
326 vs->type = ntohl(x->type);
327 vs->min_quota = 0;
328 vs->max_quota = xdr_to_u64(x->max_quota);
329 vs->blocks_in_use = xdr_to_u64(x->blocks_in_use);
330 vs->part_blocks_avail = xdr_to_u64(x->part_blocks_avail);
331 vs->part_max_blocks = xdr_to_u64(x->part_max_blocks);
332 vs->vol_copy_date = xdr_to_u64(x->vol_copy_date);
333 vs->vol_backup_date = xdr_to_u64(x->vol_backup_date);
334 *_bp += sizeof(*x) / sizeof(__be32);
335 }
336
337 /*
338 * Deliver a reply that's a status, callback and volsync.
339 */
340 static int yfs_deliver_fs_status_cb_and_volsync(struct afs_call *call)
341 {
342 const __be32 *bp;
343 int ret;
344
345 ret = afs_transfer_reply(call);
346 if (ret < 0)
347 return ret;
348
349 /* unmarshall the reply once we've received all of it */
350 bp = call->buffer;
351 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
352 if (ret < 0)
353 return ret;
354 xdr_decode_YFSCallBack(&bp, call, call->out_scb);
355 xdr_decode_YFSVolSync(&bp, call->out_volsync);
356
357 _leave(" = 0 [done]");
358 return 0;
359 }
360
361 /*
362 * Deliver reply data to operations that just return a file status and a volume
363 * sync record.
364 */
365 static int yfs_deliver_status_and_volsync(struct afs_call *call)
366 {
367 const __be32 *bp;
368 int ret;
369
370 ret = afs_transfer_reply(call);
371 if (ret < 0)
372 return ret;
373
374 bp = call->buffer;
375 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
376 if (ret < 0)
377 return ret;
378 xdr_decode_YFSVolSync(&bp, call->out_volsync);
379
380 _leave(" = 0 [done]");
381 return 0;
382 }
383
384 /*
385 * YFS.FetchStatus operation type
386 */
387 static const struct afs_call_type yfs_RXYFSFetchStatus_vnode = {
388 .name = "YFS.FetchStatus(vnode)",
389 .op = yfs_FS_FetchStatus,
390 .deliver = yfs_deliver_fs_status_cb_and_volsync,
391 .destructor = afs_flat_call_destructor,
392 };
393
394 /*
395 * Fetch the status information for a file.
396 */
397 int yfs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_status_cb *scb,
398 struct afs_volsync *volsync)
399 {
400 struct afs_vnode *vnode = fc->vnode;
401 struct afs_call *call;
402 struct afs_net *net = afs_v2net(vnode);
403 __be32 *bp;
404
405 _enter(",%x,{%llx:%llu},,",
406 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
407
408 call = afs_alloc_flat_call(net, &yfs_RXYFSFetchStatus_vnode,
409 sizeof(__be32) * 2 +
410 sizeof(struct yfs_xdr_YFSFid),
411 sizeof(struct yfs_xdr_YFSFetchStatus) +
412 sizeof(struct yfs_xdr_YFSCallBack) +
413 sizeof(struct yfs_xdr_YFSVolSync));
414 if (!call) {
415 fc->ac.error = -ENOMEM;
416 return -ENOMEM;
417 }
418
419 call->key = fc->key;
420 call->out_scb = scb;
421 call->out_volsync = volsync;
422
423 /* marshall the parameters */
424 bp = call->request;
425 bp = xdr_encode_u32(bp, YFSFETCHSTATUS);
426 bp = xdr_encode_u32(bp, 0); /* RPC flags */
427 bp = xdr_encode_YFSFid(bp, &vnode->fid);
428 yfs_check_req(call, bp);
429
430 afs_use_fs_server(call, fc->cbi);
431 trace_afs_make_fs_call(call, &vnode->fid);
432 afs_set_fc_call(call, fc);
433 afs_make_call(&fc->ac, call, GFP_NOFS);
434 return afs_wait_for_call_to_complete(call, &fc->ac);
435 }
436
437 /*
438 * Deliver reply data to an YFS.FetchData64.
439 */
440 static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
441 {
442 struct afs_read *req = call->read_request;
443 const __be32 *bp;
444 unsigned int size;
445 int ret;
446
447 _enter("{%u,%zu/%llu}",
448 call->unmarshall, iov_iter_count(call->iter), req->actual_len);
449
450 switch (call->unmarshall) {
451 case 0:
452 req->actual_len = 0;
453 req->index = 0;
454 req->offset = req->pos & (PAGE_SIZE - 1);
455 afs_extract_to_tmp64(call);
456 call->unmarshall++;
457 /* Fall through */
458
459 /* extract the returned data length */
460 case 1:
461 _debug("extract data length");
462 ret = afs_extract_data(call, true);
463 if (ret < 0)
464 return ret;
465
466 req->actual_len = be64_to_cpu(call->tmp64);
467 _debug("DATA length: %llu", req->actual_len);
468 req->remain = min(req->len, req->actual_len);
469 if (req->remain == 0)
470 goto no_more_data;
471
472 call->unmarshall++;
473
474 begin_page:
475 ASSERTCMP(req->index, <, req->nr_pages);
476 if (req->remain > PAGE_SIZE - req->offset)
477 size = PAGE_SIZE - req->offset;
478 else
479 size = req->remain;
480 call->bvec[0].bv_len = size;
481 call->bvec[0].bv_offset = req->offset;
482 call->bvec[0].bv_page = req->pages[req->index];
483 iov_iter_bvec(&call->def_iter, READ, call->bvec, 1, size);
484 ASSERTCMP(size, <=, PAGE_SIZE);
485 /* Fall through */
486
487 /* extract the returned data */
488 case 2:
489 _debug("extract data %zu/%llu",
490 iov_iter_count(call->iter), req->remain);
491
492 ret = afs_extract_data(call, true);
493 if (ret < 0)
494 return ret;
495 req->remain -= call->bvec[0].bv_len;
496 req->offset += call->bvec[0].bv_len;
497 ASSERTCMP(req->offset, <=, PAGE_SIZE);
498 if (req->offset == PAGE_SIZE) {
499 req->offset = 0;
500 req->index++;
501 if (req->remain > 0)
502 goto begin_page;
503 }
504
505 ASSERTCMP(req->remain, ==, 0);
506 if (req->actual_len <= req->len)
507 goto no_more_data;
508
509 /* Discard any excess data the server gave us */
510 afs_extract_discard(call, req->actual_len - req->len);
511 call->unmarshall = 3;
512 /* Fall through */
513
514 case 3:
515 _debug("extract discard %zu/%llu",
516 iov_iter_count(call->iter), req->actual_len - req->len);
517
518 ret = afs_extract_data(call, true);
519 if (ret < 0)
520 return ret;
521
522 no_more_data:
523 call->unmarshall = 4;
524 afs_extract_to_buf(call,
525 sizeof(struct yfs_xdr_YFSFetchStatus) +
526 sizeof(struct yfs_xdr_YFSCallBack) +
527 sizeof(struct yfs_xdr_YFSVolSync));
528 /* Fall through */
529
530 /* extract the metadata */
531 case 4:
532 ret = afs_extract_data(call, false);
533 if (ret < 0)
534 return ret;
535
536 bp = call->buffer;
537 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
538 if (ret < 0)
539 return ret;
540 xdr_decode_YFSCallBack(&bp, call, call->out_scb);
541 xdr_decode_YFSVolSync(&bp, call->out_volsync);
542
543 req->data_version = call->out_scb->status.data_version;
544 req->file_size = call->out_scb->status.size;
545
546 call->unmarshall++;
547 /* Fall through */
548
549 case 5:
550 break;
551 }
552
553 for (; req->index < req->nr_pages; req->index++) {
554 if (req->offset < PAGE_SIZE)
555 zero_user_segment(req->pages[req->index],
556 req->offset, PAGE_SIZE);
557 req->offset = 0;
558 }
559
560 if (req->page_done)
561 for (req->index = 0; req->index < req->nr_pages; req->index++)
562 req->page_done(req);
563
564 _leave(" = 0 [done]");
565 return 0;
566 }
567
568 static void yfs_fetch_data_destructor(struct afs_call *call)
569 {
570 afs_put_read(call->read_request);
571 afs_flat_call_destructor(call);
572 }
573
574 /*
575 * YFS.FetchData64 operation type
576 */
577 static const struct afs_call_type yfs_RXYFSFetchData64 = {
578 .name = "YFS.FetchData64",
579 .op = yfs_FS_FetchData64,
580 .deliver = yfs_deliver_fs_fetch_data64,
581 .destructor = yfs_fetch_data_destructor,
582 };
583
584 /*
585 * Fetch data from a file.
586 */
587 int yfs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_status_cb *scb,
588 struct afs_read *req)
589 {
590 struct afs_vnode *vnode = fc->vnode;
591 struct afs_call *call;
592 struct afs_net *net = afs_v2net(vnode);
593 __be32 *bp;
594
595 _enter(",%x,{%llx:%llu},%llx,%llx",
596 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode,
597 req->pos, req->len);
598
599 call = afs_alloc_flat_call(net, &yfs_RXYFSFetchData64,
600 sizeof(__be32) * 2 +
601 sizeof(struct yfs_xdr_YFSFid) +
602 sizeof(struct yfs_xdr_u64) * 2,
603 sizeof(struct yfs_xdr_YFSFetchStatus) +
604 sizeof(struct yfs_xdr_YFSCallBack) +
605 sizeof(struct yfs_xdr_YFSVolSync));
606 if (!call)
607 return -ENOMEM;
608
609 call->key = fc->key;
610 call->out_scb = scb;
611 call->out_volsync = NULL;
612 call->read_request = afs_get_read(req);
613
614 /* marshall the parameters */
615 bp = call->request;
616 bp = xdr_encode_u32(bp, YFSFETCHDATA64);
617 bp = xdr_encode_u32(bp, 0); /* RPC flags */
618 bp = xdr_encode_YFSFid(bp, &vnode->fid);
619 bp = xdr_encode_u64(bp, req->pos);
620 bp = xdr_encode_u64(bp, req->len);
621 yfs_check_req(call, bp);
622
623 afs_use_fs_server(call, fc->cbi);
624 trace_afs_make_fs_call(call, &vnode->fid);
625 afs_set_fc_call(call, fc);
626 afs_make_call(&fc->ac, call, GFP_NOFS);
627 return afs_wait_for_call_to_complete(call, &fc->ac);
628 }
629
630 /*
631 * Deliver reply data for YFS.CreateFile or YFS.MakeDir.
632 */
633 static int yfs_deliver_fs_create_vnode(struct afs_call *call)
634 {
635 const __be32 *bp;
636 int ret;
637
638 _enter("{%u}", call->unmarshall);
639
640 ret = afs_transfer_reply(call);
641 if (ret < 0)
642 return ret;
643
644 /* unmarshall the reply once we've received all of it */
645 bp = call->buffer;
646 xdr_decode_YFSFid(&bp, call->out_fid);
647 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
648 if (ret < 0)
649 return ret;
650 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
651 if (ret < 0)
652 return ret;
653 xdr_decode_YFSCallBack(&bp, call, call->out_scb);
654 xdr_decode_YFSVolSync(&bp, call->out_volsync);
655
656 _leave(" = 0 [done]");
657 return 0;
658 }
659
660 /*
661 * FS.CreateFile and FS.MakeDir operation type
662 */
663 static const struct afs_call_type afs_RXFSCreateFile = {
664 .name = "YFS.CreateFile",
665 .op = yfs_FS_CreateFile,
666 .deliver = yfs_deliver_fs_create_vnode,
667 .destructor = afs_flat_call_destructor,
668 };
669
670 /*
671 * Create a file.
672 */
673 int yfs_fs_create_file(struct afs_fs_cursor *fc,
674 const char *name,
675 umode_t mode,
676 struct afs_status_cb *dvnode_scb,
677 struct afs_fid *newfid,
678 struct afs_status_cb *new_scb)
679 {
680 struct afs_vnode *dvnode = fc->vnode;
681 struct afs_call *call;
682 struct afs_net *net = afs_v2net(dvnode);
683 size_t namesz, reqsz, rplsz;
684 __be32 *bp;
685
686 _enter("");
687
688 namesz = strlen(name);
689 reqsz = (sizeof(__be32) +
690 sizeof(__be32) +
691 sizeof(struct yfs_xdr_YFSFid) +
692 xdr_strlen(namesz) +
693 sizeof(struct yfs_xdr_YFSStoreStatus) +
694 sizeof(__be32));
695 rplsz = (sizeof(struct yfs_xdr_YFSFid) +
696 sizeof(struct yfs_xdr_YFSFetchStatus) +
697 sizeof(struct yfs_xdr_YFSFetchStatus) +
698 sizeof(struct yfs_xdr_YFSCallBack) +
699 sizeof(struct yfs_xdr_YFSVolSync));
700
701 call = afs_alloc_flat_call(net, &afs_RXFSCreateFile, reqsz, rplsz);
702 if (!call)
703 return -ENOMEM;
704
705 call->key = fc->key;
706 call->out_dir_scb = dvnode_scb;
707 call->out_fid = newfid;
708 call->out_scb = new_scb;
709
710 /* marshall the parameters */
711 bp = call->request;
712 bp = xdr_encode_u32(bp, YFSCREATEFILE);
713 bp = xdr_encode_u32(bp, 0); /* RPC flags */
714 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
715 bp = xdr_encode_string(bp, name, namesz);
716 bp = xdr_encode_YFSStoreStatus_mode(bp, mode);
717 bp = xdr_encode_u32(bp, yfs_LockNone); /* ViceLockType */
718 yfs_check_req(call, bp);
719
720 afs_use_fs_server(call, fc->cbi);
721 trace_afs_make_fs_call1(call, &dvnode->fid, name);
722 afs_set_fc_call(call, fc);
723 afs_make_call(&fc->ac, call, GFP_NOFS);
724 return afs_wait_for_call_to_complete(call, &fc->ac);
725 }
726
727 static const struct afs_call_type yfs_RXFSMakeDir = {
728 .name = "YFS.MakeDir",
729 .op = yfs_FS_MakeDir,
730 .deliver = yfs_deliver_fs_create_vnode,
731 .destructor = afs_flat_call_destructor,
732 };
733
734 /*
735 * Make a directory.
736 */
737 int yfs_fs_make_dir(struct afs_fs_cursor *fc,
738 const char *name,
739 umode_t mode,
740 struct afs_status_cb *dvnode_scb,
741 struct afs_fid *newfid,
742 struct afs_status_cb *new_scb)
743 {
744 struct afs_vnode *dvnode = fc->vnode;
745 struct afs_call *call;
746 struct afs_net *net = afs_v2net(dvnode);
747 size_t namesz, reqsz, rplsz;
748 __be32 *bp;
749
750 _enter("");
751
752 namesz = strlen(name);
753 reqsz = (sizeof(__be32) +
754 sizeof(struct yfs_xdr_RPCFlags) +
755 sizeof(struct yfs_xdr_YFSFid) +
756 xdr_strlen(namesz) +
757 sizeof(struct yfs_xdr_YFSStoreStatus));
758 rplsz = (sizeof(struct yfs_xdr_YFSFid) +
759 sizeof(struct yfs_xdr_YFSFetchStatus) +
760 sizeof(struct yfs_xdr_YFSFetchStatus) +
761 sizeof(struct yfs_xdr_YFSCallBack) +
762 sizeof(struct yfs_xdr_YFSVolSync));
763
764 call = afs_alloc_flat_call(net, &yfs_RXFSMakeDir, reqsz, rplsz);
765 if (!call)
766 return -ENOMEM;
767
768 call->key = fc->key;
769 call->out_dir_scb = dvnode_scb;
770 call->out_fid = newfid;
771 call->out_scb = new_scb;
772
773 /* marshall the parameters */
774 bp = call->request;
775 bp = xdr_encode_u32(bp, YFSMAKEDIR);
776 bp = xdr_encode_u32(bp, 0); /* RPC flags */
777 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
778 bp = xdr_encode_string(bp, name, namesz);
779 bp = xdr_encode_YFSStoreStatus_mode(bp, mode);
780 yfs_check_req(call, bp);
781
782 afs_use_fs_server(call, fc->cbi);
783 trace_afs_make_fs_call1(call, &dvnode->fid, name);
784 afs_set_fc_call(call, fc);
785 afs_make_call(&fc->ac, call, GFP_NOFS);
786 return afs_wait_for_call_to_complete(call, &fc->ac);
787 }
788
789 /*
790 * Deliver reply data to a YFS.RemoveFile2 operation.
791 */
792 static int yfs_deliver_fs_remove_file2(struct afs_call *call)
793 {
794 struct afs_fid fid;
795 const __be32 *bp;
796 int ret;
797
798 _enter("{%u}", call->unmarshall);
799
800 ret = afs_transfer_reply(call);
801 if (ret < 0)
802 return ret;
803
804 bp = call->buffer;
805 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
806 if (ret < 0)
807 return ret;
808
809 xdr_decode_YFSFid(&bp, &fid);
810 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
811 if (ret < 0)
812 return ret;
813 /* Was deleted if vnode->status.abort_code == VNOVNODE. */
814
815 xdr_decode_YFSVolSync(&bp, call->out_volsync);
816 return 0;
817 }
818
819 /*
820 * YFS.RemoveFile2 operation type.
821 */
822 static const struct afs_call_type yfs_RXYFSRemoveFile2 = {
823 .name = "YFS.RemoveFile2",
824 .op = yfs_FS_RemoveFile2,
825 .deliver = yfs_deliver_fs_remove_file2,
826 .destructor = afs_flat_call_destructor,
827 };
828
829 /*
830 * Remove a file and retrieve new file status.
831 */
832 int yfs_fs_remove_file2(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
833 const char *name, struct afs_status_cb *dvnode_scb,
834 struct afs_status_cb *vnode_scb)
835 {
836 struct afs_vnode *dvnode = fc->vnode;
837 struct afs_call *call;
838 struct afs_net *net = afs_v2net(dvnode);
839 size_t namesz;
840 __be32 *bp;
841
842 _enter("");
843
844 namesz = strlen(name);
845
846 call = afs_alloc_flat_call(net, &yfs_RXYFSRemoveFile2,
847 sizeof(__be32) +
848 sizeof(struct yfs_xdr_RPCFlags) +
849 sizeof(struct yfs_xdr_YFSFid) +
850 xdr_strlen(namesz),
851 sizeof(struct yfs_xdr_YFSFetchStatus) +
852 sizeof(struct yfs_xdr_YFSFid) +
853 sizeof(struct yfs_xdr_YFSFetchStatus) +
854 sizeof(struct yfs_xdr_YFSVolSync));
855 if (!call)
856 return -ENOMEM;
857
858 call->key = fc->key;
859 call->out_dir_scb = dvnode_scb;
860 call->out_scb = vnode_scb;
861
862 /* marshall the parameters */
863 bp = call->request;
864 bp = xdr_encode_u32(bp, YFSREMOVEFILE2);
865 bp = xdr_encode_u32(bp, 0); /* RPC flags */
866 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
867 bp = xdr_encode_string(bp, name, namesz);
868 yfs_check_req(call, bp);
869
870 afs_use_fs_server(call, fc->cbi);
871 trace_afs_make_fs_call1(call, &dvnode->fid, name);
872 afs_set_fc_call(call, fc);
873 afs_make_call(&fc->ac, call, GFP_NOFS);
874 return afs_wait_for_call_to_complete(call, &fc->ac);
875 }
876
877 /*
878 * Deliver reply data to a YFS.RemoveFile or YFS.RemoveDir operation.
879 */
880 static int yfs_deliver_fs_remove(struct afs_call *call)
881 {
882 const __be32 *bp;
883 int ret;
884
885 _enter("{%u}", call->unmarshall);
886
887 ret = afs_transfer_reply(call);
888 if (ret < 0)
889 return ret;
890
891 bp = call->buffer;
892 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
893 if (ret < 0)
894 return ret;
895
896 xdr_decode_YFSVolSync(&bp, call->out_volsync);
897 return 0;
898 }
899
900 /*
901 * FS.RemoveDir and FS.RemoveFile operation types.
902 */
903 static const struct afs_call_type yfs_RXYFSRemoveFile = {
904 .name = "YFS.RemoveFile",
905 .op = yfs_FS_RemoveFile,
906 .deliver = yfs_deliver_fs_remove,
907 .destructor = afs_flat_call_destructor,
908 };
909
910 static const struct afs_call_type yfs_RXYFSRemoveDir = {
911 .name = "YFS.RemoveDir",
912 .op = yfs_FS_RemoveDir,
913 .deliver = yfs_deliver_fs_remove,
914 .destructor = afs_flat_call_destructor,
915 };
916
917 /*
918 * remove a file or directory
919 */
920 int yfs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
921 const char *name, bool isdir,
922 struct afs_status_cb *dvnode_scb)
923 {
924 struct afs_vnode *dvnode = fc->vnode;
925 struct afs_call *call;
926 struct afs_net *net = afs_v2net(dvnode);
927 size_t namesz;
928 __be32 *bp;
929
930 _enter("");
931
932 namesz = strlen(name);
933 call = afs_alloc_flat_call(
934 net, isdir ? &yfs_RXYFSRemoveDir : &yfs_RXYFSRemoveFile,
935 sizeof(__be32) +
936 sizeof(struct yfs_xdr_RPCFlags) +
937 sizeof(struct yfs_xdr_YFSFid) +
938 xdr_strlen(namesz),
939 sizeof(struct yfs_xdr_YFSFetchStatus) +
940 sizeof(struct yfs_xdr_YFSVolSync));
941 if (!call)
942 return -ENOMEM;
943
944 call->key = fc->key;
945 call->out_dir_scb = dvnode_scb;
946
947 /* marshall the parameters */
948 bp = call->request;
949 bp = xdr_encode_u32(bp, isdir ? YFSREMOVEDIR : YFSREMOVEFILE);
950 bp = xdr_encode_u32(bp, 0); /* RPC flags */
951 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
952 bp = xdr_encode_string(bp, name, namesz);
953 yfs_check_req(call, bp);
954
955 afs_use_fs_server(call, fc->cbi);
956 trace_afs_make_fs_call1(call, &dvnode->fid, name);
957 afs_set_fc_call(call, fc);
958 afs_make_call(&fc->ac, call, GFP_NOFS);
959 return afs_wait_for_call_to_complete(call, &fc->ac);
960 }
961
962 /*
963 * Deliver reply data to a YFS.Link operation.
964 */
965 static int yfs_deliver_fs_link(struct afs_call *call)
966 {
967 const __be32 *bp;
968 int ret;
969
970 _enter("{%u}", call->unmarshall);
971
972 ret = afs_transfer_reply(call);
973 if (ret < 0)
974 return ret;
975
976 bp = call->buffer;
977 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
978 if (ret < 0)
979 return ret;
980 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
981 if (ret < 0)
982 return ret;
983 xdr_decode_YFSVolSync(&bp, call->out_volsync);
984 _leave(" = 0 [done]");
985 return 0;
986 }
987
988 /*
989 * YFS.Link operation type.
990 */
991 static const struct afs_call_type yfs_RXYFSLink = {
992 .name = "YFS.Link",
993 .op = yfs_FS_Link,
994 .deliver = yfs_deliver_fs_link,
995 .destructor = afs_flat_call_destructor,
996 };
997
998 /*
999 * Make a hard link.
1000 */
1001 int yfs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
1002 const char *name,
1003 struct afs_status_cb *dvnode_scb,
1004 struct afs_status_cb *vnode_scb)
1005 {
1006 struct afs_vnode *dvnode = fc->vnode;
1007 struct afs_call *call;
1008 struct afs_net *net = afs_v2net(vnode);
1009 size_t namesz;
1010 __be32 *bp;
1011
1012 _enter("");
1013
1014 namesz = strlen(name);
1015 call = afs_alloc_flat_call(net, &yfs_RXYFSLink,
1016 sizeof(__be32) +
1017 sizeof(struct yfs_xdr_RPCFlags) +
1018 sizeof(struct yfs_xdr_YFSFid) +
1019 xdr_strlen(namesz) +
1020 sizeof(struct yfs_xdr_YFSFid),
1021 sizeof(struct yfs_xdr_YFSFetchStatus) +
1022 sizeof(struct yfs_xdr_YFSFetchStatus) +
1023 sizeof(struct yfs_xdr_YFSVolSync));
1024 if (!call)
1025 return -ENOMEM;
1026
1027 call->key = fc->key;
1028 call->out_dir_scb = dvnode_scb;
1029 call->out_scb = vnode_scb;
1030
1031 /* marshall the parameters */
1032 bp = call->request;
1033 bp = xdr_encode_u32(bp, YFSLINK);
1034 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1035 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
1036 bp = xdr_encode_string(bp, name, namesz);
1037 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1038 yfs_check_req(call, bp);
1039
1040 afs_use_fs_server(call, fc->cbi);
1041 trace_afs_make_fs_call1(call, &vnode->fid, name);
1042 afs_set_fc_call(call, fc);
1043 afs_make_call(&fc->ac, call, GFP_NOFS);
1044 return afs_wait_for_call_to_complete(call, &fc->ac);
1045 }
1046
1047 /*
1048 * Deliver reply data to a YFS.Symlink operation.
1049 */
1050 static int yfs_deliver_fs_symlink(struct afs_call *call)
1051 {
1052 const __be32 *bp;
1053 int ret;
1054
1055 _enter("{%u}", call->unmarshall);
1056
1057 ret = afs_transfer_reply(call);
1058 if (ret < 0)
1059 return ret;
1060
1061 /* unmarshall the reply once we've received all of it */
1062 bp = call->buffer;
1063 xdr_decode_YFSFid(&bp, call->out_fid);
1064 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
1065 if (ret < 0)
1066 return ret;
1067 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
1068 if (ret < 0)
1069 return ret;
1070 xdr_decode_YFSVolSync(&bp, call->out_volsync);
1071
1072 _leave(" = 0 [done]");
1073 return 0;
1074 }
1075
1076 /*
1077 * YFS.Symlink operation type
1078 */
1079 static const struct afs_call_type yfs_RXYFSSymlink = {
1080 .name = "YFS.Symlink",
1081 .op = yfs_FS_Symlink,
1082 .deliver = yfs_deliver_fs_symlink,
1083 .destructor = afs_flat_call_destructor,
1084 };
1085
1086 /*
1087 * Create a symbolic link.
1088 */
1089 int yfs_fs_symlink(struct afs_fs_cursor *fc,
1090 const char *name,
1091 const char *contents,
1092 struct afs_status_cb *dvnode_scb,
1093 struct afs_fid *newfid,
1094 struct afs_status_cb *vnode_scb)
1095 {
1096 struct afs_vnode *dvnode = fc->vnode;
1097 struct afs_call *call;
1098 struct afs_net *net = afs_v2net(dvnode);
1099 size_t namesz, contents_sz;
1100 __be32 *bp;
1101
1102 _enter("");
1103
1104 namesz = strlen(name);
1105 contents_sz = strlen(contents);
1106 call = afs_alloc_flat_call(net, &yfs_RXYFSSymlink,
1107 sizeof(__be32) +
1108 sizeof(struct yfs_xdr_RPCFlags) +
1109 sizeof(struct yfs_xdr_YFSFid) +
1110 xdr_strlen(namesz) +
1111 xdr_strlen(contents_sz) +
1112 sizeof(struct yfs_xdr_YFSStoreStatus),
1113 sizeof(struct yfs_xdr_YFSFid) +
1114 sizeof(struct yfs_xdr_YFSFetchStatus) +
1115 sizeof(struct yfs_xdr_YFSFetchStatus) +
1116 sizeof(struct yfs_xdr_YFSVolSync));
1117 if (!call)
1118 return -ENOMEM;
1119
1120 call->key = fc->key;
1121 call->out_dir_scb = dvnode_scb;
1122 call->out_fid = newfid;
1123 call->out_scb = vnode_scb;
1124
1125 /* marshall the parameters */
1126 bp = call->request;
1127 bp = xdr_encode_u32(bp, YFSSYMLINK);
1128 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1129 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
1130 bp = xdr_encode_string(bp, name, namesz);
1131 bp = xdr_encode_string(bp, contents, contents_sz);
1132 bp = xdr_encode_YFSStoreStatus_mode(bp, S_IRWXUGO);
1133 yfs_check_req(call, bp);
1134
1135 afs_use_fs_server(call, fc->cbi);
1136 trace_afs_make_fs_call1(call, &dvnode->fid, name);
1137 afs_set_fc_call(call, fc);
1138 afs_make_call(&fc->ac, call, GFP_NOFS);
1139 return afs_wait_for_call_to_complete(call, &fc->ac);
1140 }
1141
1142 /*
1143 * Deliver reply data to a YFS.Rename operation.
1144 */
1145 static int yfs_deliver_fs_rename(struct afs_call *call)
1146 {
1147 const __be32 *bp;
1148 int ret;
1149
1150 _enter("{%u}", call->unmarshall);
1151
1152 ret = afs_transfer_reply(call);
1153 if (ret < 0)
1154 return ret;
1155
1156 bp = call->buffer;
1157 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
1158 if (ret < 0)
1159 return ret;
1160 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
1161 if (ret < 0)
1162 return ret;
1163
1164 xdr_decode_YFSVolSync(&bp, call->out_volsync);
1165 _leave(" = 0 [done]");
1166 return 0;
1167 }
1168
1169 /*
1170 * YFS.Rename operation type
1171 */
1172 static const struct afs_call_type yfs_RXYFSRename = {
1173 .name = "FS.Rename",
1174 .op = yfs_FS_Rename,
1175 .deliver = yfs_deliver_fs_rename,
1176 .destructor = afs_flat_call_destructor,
1177 };
1178
1179 /*
1180 * Rename a file or directory.
1181 */
1182 int yfs_fs_rename(struct afs_fs_cursor *fc,
1183 const char *orig_name,
1184 struct afs_vnode *new_dvnode,
1185 const char *new_name,
1186 struct afs_status_cb *orig_dvnode_scb,
1187 struct afs_status_cb *new_dvnode_scb)
1188 {
1189 struct afs_vnode *orig_dvnode = fc->vnode;
1190 struct afs_call *call;
1191 struct afs_net *net = afs_v2net(orig_dvnode);
1192 size_t o_namesz, n_namesz;
1193 __be32 *bp;
1194
1195 _enter("");
1196
1197 o_namesz = strlen(orig_name);
1198 n_namesz = strlen(new_name);
1199 call = afs_alloc_flat_call(net, &yfs_RXYFSRename,
1200 sizeof(__be32) +
1201 sizeof(struct yfs_xdr_RPCFlags) +
1202 sizeof(struct yfs_xdr_YFSFid) +
1203 xdr_strlen(o_namesz) +
1204 sizeof(struct yfs_xdr_YFSFid) +
1205 xdr_strlen(n_namesz),
1206 sizeof(struct yfs_xdr_YFSFetchStatus) +
1207 sizeof(struct yfs_xdr_YFSFetchStatus) +
1208 sizeof(struct yfs_xdr_YFSVolSync));
1209 if (!call)
1210 return -ENOMEM;
1211
1212 call->key = fc->key;
1213 call->out_dir_scb = orig_dvnode_scb;
1214 call->out_scb = new_dvnode_scb;
1215
1216 /* marshall the parameters */
1217 bp = call->request;
1218 bp = xdr_encode_u32(bp, YFSRENAME);
1219 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1220 bp = xdr_encode_YFSFid(bp, &orig_dvnode->fid);
1221 bp = xdr_encode_string(bp, orig_name, o_namesz);
1222 bp = xdr_encode_YFSFid(bp, &new_dvnode->fid);
1223 bp = xdr_encode_string(bp, new_name, n_namesz);
1224 yfs_check_req(call, bp);
1225
1226 afs_use_fs_server(call, fc->cbi);
1227 trace_afs_make_fs_call2(call, &orig_dvnode->fid, orig_name, new_name);
1228 afs_set_fc_call(call, fc);
1229 afs_make_call(&fc->ac, call, GFP_NOFS);
1230 return afs_wait_for_call_to_complete(call, &fc->ac);
1231 }
1232
1233 /*
1234 * YFS.StoreData64 operation type.
1235 */
1236 static const struct afs_call_type yfs_RXYFSStoreData64 = {
1237 .name = "YFS.StoreData64",
1238 .op = yfs_FS_StoreData64,
1239 .deliver = yfs_deliver_status_and_volsync,
1240 .destructor = afs_flat_call_destructor,
1241 };
1242
1243 /*
1244 * Store a set of pages to a large file.
1245 */
1246 int yfs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
1247 pgoff_t first, pgoff_t last,
1248 unsigned offset, unsigned to,
1249 struct afs_status_cb *scb)
1250 {
1251 struct afs_vnode *vnode = fc->vnode;
1252 struct afs_call *call;
1253 struct afs_net *net = afs_v2net(vnode);
1254 loff_t size, pos, i_size;
1255 __be32 *bp;
1256
1257 _enter(",%x,{%llx:%llu},,",
1258 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1259
1260 size = (loff_t)to - (loff_t)offset;
1261 if (first != last)
1262 size += (loff_t)(last - first) << PAGE_SHIFT;
1263 pos = (loff_t)first << PAGE_SHIFT;
1264 pos += offset;
1265
1266 i_size = i_size_read(&vnode->vfs_inode);
1267 if (pos + size > i_size)
1268 i_size = size + pos;
1269
1270 _debug("size %llx, at %llx, i_size %llx",
1271 (unsigned long long)size, (unsigned long long)pos,
1272 (unsigned long long)i_size);
1273
1274 call = afs_alloc_flat_call(net, &yfs_RXYFSStoreData64,
1275 sizeof(__be32) +
1276 sizeof(__be32) +
1277 sizeof(struct yfs_xdr_YFSFid) +
1278 sizeof(struct yfs_xdr_YFSStoreStatus) +
1279 sizeof(struct yfs_xdr_u64) * 3,
1280 sizeof(struct yfs_xdr_YFSFetchStatus) +
1281 sizeof(struct yfs_xdr_YFSVolSync));
1282 if (!call)
1283 return -ENOMEM;
1284
1285 call->key = fc->key;
1286 call->mapping = mapping;
1287 call->first = first;
1288 call->last = last;
1289 call->first_offset = offset;
1290 call->last_to = to;
1291 call->send_pages = true;
1292 call->out_scb = scb;
1293
1294 /* marshall the parameters */
1295 bp = call->request;
1296 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1297 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1298 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1299 bp = xdr_encode_YFSStoreStatus_mtime(bp, &vnode->vfs_inode.i_mtime);
1300 bp = xdr_encode_u64(bp, pos);
1301 bp = xdr_encode_u64(bp, size);
1302 bp = xdr_encode_u64(bp, i_size);
1303 yfs_check_req(call, bp);
1304
1305 afs_use_fs_server(call, fc->cbi);
1306 trace_afs_make_fs_call(call, &vnode->fid);
1307 afs_set_fc_call(call, fc);
1308 afs_make_call(&fc->ac, call, GFP_NOFS);
1309 return afs_wait_for_call_to_complete(call, &fc->ac);
1310 }
1311
1312 /*
1313 * YFS.StoreStatus operation type
1314 */
1315 static const struct afs_call_type yfs_RXYFSStoreStatus = {
1316 .name = "YFS.StoreStatus",
1317 .op = yfs_FS_StoreStatus,
1318 .deliver = yfs_deliver_status_and_volsync,
1319 .destructor = afs_flat_call_destructor,
1320 };
1321
1322 static const struct afs_call_type yfs_RXYFSStoreData64_as_Status = {
1323 .name = "YFS.StoreData64",
1324 .op = yfs_FS_StoreData64,
1325 .deliver = yfs_deliver_status_and_volsync,
1326 .destructor = afs_flat_call_destructor,
1327 };
1328
1329 /*
1330 * Set the attributes on a file, using YFS.StoreData64 rather than
1331 * YFS.StoreStatus so as to alter the file size also.
1332 */
1333 static int yfs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr,
1334 struct afs_status_cb *scb)
1335 {
1336 struct afs_vnode *vnode = fc->vnode;
1337 struct afs_call *call;
1338 struct afs_net *net = afs_v2net(vnode);
1339 __be32 *bp;
1340
1341 _enter(",%x,{%llx:%llu},,",
1342 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1343
1344 call = afs_alloc_flat_call(net, &yfs_RXYFSStoreData64_as_Status,
1345 sizeof(__be32) * 2 +
1346 sizeof(struct yfs_xdr_YFSFid) +
1347 sizeof(struct yfs_xdr_YFSStoreStatus) +
1348 sizeof(struct yfs_xdr_u64) * 3,
1349 sizeof(struct yfs_xdr_YFSFetchStatus) +
1350 sizeof(struct yfs_xdr_YFSVolSync));
1351 if (!call)
1352 return -ENOMEM;
1353
1354 call->key = fc->key;
1355 call->out_scb = scb;
1356
1357 /* marshall the parameters */
1358 bp = call->request;
1359 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1360 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1361 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1362 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1363 bp = xdr_encode_u64(bp, attr->ia_size); /* position of start of write */
1364 bp = xdr_encode_u64(bp, 0); /* size of write */
1365 bp = xdr_encode_u64(bp, attr->ia_size); /* new file length */
1366 yfs_check_req(call, bp);
1367
1368 afs_use_fs_server(call, fc->cbi);
1369 trace_afs_make_fs_call(call, &vnode->fid);
1370 afs_set_fc_call(call, fc);
1371 afs_make_call(&fc->ac, call, GFP_NOFS);
1372 return afs_wait_for_call_to_complete(call, &fc->ac);
1373 }
1374
1375 /*
1376 * Set the attributes on a file, using YFS.StoreData64 if there's a change in
1377 * file size, and YFS.StoreStatus otherwise.
1378 */
1379 int yfs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr,
1380 struct afs_status_cb *scb)
1381 {
1382 struct afs_vnode *vnode = fc->vnode;
1383 struct afs_call *call;
1384 struct afs_net *net = afs_v2net(vnode);
1385 __be32 *bp;
1386
1387 if (attr->ia_valid & ATTR_SIZE)
1388 return yfs_fs_setattr_size(fc, attr, scb);
1389
1390 _enter(",%x,{%llx:%llu},,",
1391 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1392
1393 call = afs_alloc_flat_call(net, &yfs_RXYFSStoreStatus,
1394 sizeof(__be32) * 2 +
1395 sizeof(struct yfs_xdr_YFSFid) +
1396 sizeof(struct yfs_xdr_YFSStoreStatus),
1397 sizeof(struct yfs_xdr_YFSFetchStatus) +
1398 sizeof(struct yfs_xdr_YFSVolSync));
1399 if (!call)
1400 return -ENOMEM;
1401
1402 call->key = fc->key;
1403 call->out_scb = scb;
1404
1405 /* marshall the parameters */
1406 bp = call->request;
1407 bp = xdr_encode_u32(bp, YFSSTORESTATUS);
1408 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1409 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1410 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1411 yfs_check_req(call, bp);
1412
1413 afs_use_fs_server(call, fc->cbi);
1414 trace_afs_make_fs_call(call, &vnode->fid);
1415 afs_set_fc_call(call, fc);
1416 afs_make_call(&fc->ac, call, GFP_NOFS);
1417 return afs_wait_for_call_to_complete(call, &fc->ac);
1418 }
1419
1420 /*
1421 * Deliver reply data to a YFS.GetVolumeStatus operation.
1422 */
1423 static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
1424 {
1425 const __be32 *bp;
1426 char *p;
1427 u32 size;
1428 int ret;
1429
1430 _enter("{%u}", call->unmarshall);
1431
1432 switch (call->unmarshall) {
1433 case 0:
1434 call->unmarshall++;
1435 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchVolumeStatus));
1436 /* Fall through */
1437
1438 /* extract the returned status record */
1439 case 1:
1440 _debug("extract status");
1441 ret = afs_extract_data(call, true);
1442 if (ret < 0)
1443 return ret;
1444
1445 bp = call->buffer;
1446 xdr_decode_YFSFetchVolumeStatus(&bp, call->out_volstatus);
1447 call->unmarshall++;
1448 afs_extract_to_tmp(call);
1449 /* Fall through */
1450
1451 /* extract the volume name length */
1452 case 2:
1453 ret = afs_extract_data(call, true);
1454 if (ret < 0)
1455 return ret;
1456
1457 call->count = ntohl(call->tmp);
1458 _debug("volname length: %u", call->count);
1459 if (call->count >= AFSNAMEMAX)
1460 return afs_protocol_error(call, -EBADMSG,
1461 afs_eproto_volname_len);
1462 size = (call->count + 3) & ~3; /* It's padded */
1463 afs_extract_to_buf(call, size);
1464 call->unmarshall++;
1465 /* Fall through */
1466
1467 /* extract the volume name */
1468 case 3:
1469 _debug("extract volname");
1470 ret = afs_extract_data(call, true);
1471 if (ret < 0)
1472 return ret;
1473
1474 p = call->buffer;
1475 p[call->count] = 0;
1476 _debug("volname '%s'", p);
1477 afs_extract_to_tmp(call);
1478 call->unmarshall++;
1479 /* Fall through */
1480
1481 /* extract the offline message length */
1482 case 4:
1483 ret = afs_extract_data(call, true);
1484 if (ret < 0)
1485 return ret;
1486
1487 call->count = ntohl(call->tmp);
1488 _debug("offline msg length: %u", call->count);
1489 if (call->count >= AFSNAMEMAX)
1490 return afs_protocol_error(call, -EBADMSG,
1491 afs_eproto_offline_msg_len);
1492 size = (call->count + 3) & ~3; /* It's padded */
1493 afs_extract_to_buf(call, size);
1494 call->unmarshall++;
1495 /* Fall through */
1496
1497 /* extract the offline message */
1498 case 5:
1499 _debug("extract offline");
1500 ret = afs_extract_data(call, true);
1501 if (ret < 0)
1502 return ret;
1503
1504 p = call->buffer;
1505 p[call->count] = 0;
1506 _debug("offline '%s'", p);
1507
1508 afs_extract_to_tmp(call);
1509 call->unmarshall++;
1510 /* Fall through */
1511
1512 /* extract the message of the day length */
1513 case 6:
1514 ret = afs_extract_data(call, true);
1515 if (ret < 0)
1516 return ret;
1517
1518 call->count = ntohl(call->tmp);
1519 _debug("motd length: %u", call->count);
1520 if (call->count >= AFSNAMEMAX)
1521 return afs_protocol_error(call, -EBADMSG,
1522 afs_eproto_motd_len);
1523 size = (call->count + 3) & ~3; /* It's padded */
1524 afs_extract_to_buf(call, size);
1525 call->unmarshall++;
1526 /* Fall through */
1527
1528 /* extract the message of the day */
1529 case 7:
1530 _debug("extract motd");
1531 ret = afs_extract_data(call, false);
1532 if (ret < 0)
1533 return ret;
1534
1535 p = call->buffer;
1536 p[call->count] = 0;
1537 _debug("motd '%s'", p);
1538
1539 call->unmarshall++;
1540 /* Fall through */
1541
1542 case 8:
1543 break;
1544 }
1545
1546 _leave(" = 0 [done]");
1547 return 0;
1548 }
1549
1550 /*
1551 * YFS.GetVolumeStatus operation type
1552 */
1553 static const struct afs_call_type yfs_RXYFSGetVolumeStatus = {
1554 .name = "YFS.GetVolumeStatus",
1555 .op = yfs_FS_GetVolumeStatus,
1556 .deliver = yfs_deliver_fs_get_volume_status,
1557 .destructor = afs_flat_call_destructor,
1558 };
1559
1560 /*
1561 * fetch the status of a volume
1562 */
1563 int yfs_fs_get_volume_status(struct afs_fs_cursor *fc,
1564 struct afs_volume_status *vs)
1565 {
1566 struct afs_vnode *vnode = fc->vnode;
1567 struct afs_call *call;
1568 struct afs_net *net = afs_v2net(vnode);
1569 __be32 *bp;
1570
1571 _enter("");
1572
1573 call = afs_alloc_flat_call(net, &yfs_RXYFSGetVolumeStatus,
1574 sizeof(__be32) * 2 +
1575 sizeof(struct yfs_xdr_u64),
1576 max_t(size_t,
1577 sizeof(struct yfs_xdr_YFSFetchVolumeStatus) +
1578 sizeof(__be32),
1579 AFSOPAQUEMAX + 1));
1580 if (!call)
1581 return -ENOMEM;
1582
1583 call->key = fc->key;
1584 call->out_volstatus = vs;
1585
1586 /* marshall the parameters */
1587 bp = call->request;
1588 bp = xdr_encode_u32(bp, YFSGETVOLUMESTATUS);
1589 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1590 bp = xdr_encode_u64(bp, vnode->fid.vid);
1591 yfs_check_req(call, bp);
1592
1593 afs_use_fs_server(call, fc->cbi);
1594 trace_afs_make_fs_call(call, &vnode->fid);
1595 afs_set_fc_call(call, fc);
1596 afs_make_call(&fc->ac, call, GFP_NOFS);
1597 return afs_wait_for_call_to_complete(call, &fc->ac);
1598 }
1599
1600 /*
1601 * YFS.SetLock operation type
1602 */
1603 static const struct afs_call_type yfs_RXYFSSetLock = {
1604 .name = "YFS.SetLock",
1605 .op = yfs_FS_SetLock,
1606 .deliver = yfs_deliver_status_and_volsync,
1607 .done = afs_lock_op_done,
1608 .destructor = afs_flat_call_destructor,
1609 };
1610
1611 /*
1612 * YFS.ExtendLock operation type
1613 */
1614 static const struct afs_call_type yfs_RXYFSExtendLock = {
1615 .name = "YFS.ExtendLock",
1616 .op = yfs_FS_ExtendLock,
1617 .deliver = yfs_deliver_status_and_volsync,
1618 .done = afs_lock_op_done,
1619 .destructor = afs_flat_call_destructor,
1620 };
1621
1622 /*
1623 * YFS.ReleaseLock operation type
1624 */
1625 static const struct afs_call_type yfs_RXYFSReleaseLock = {
1626 .name = "YFS.ReleaseLock",
1627 .op = yfs_FS_ReleaseLock,
1628 .deliver = yfs_deliver_status_and_volsync,
1629 .destructor = afs_flat_call_destructor,
1630 };
1631
1632 /*
1633 * Set a lock on a file
1634 */
1635 int yfs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type,
1636 struct afs_status_cb *scb)
1637 {
1638 struct afs_vnode *vnode = fc->vnode;
1639 struct afs_call *call;
1640 struct afs_net *net = afs_v2net(vnode);
1641 __be32 *bp;
1642
1643 _enter("");
1644
1645 call = afs_alloc_flat_call(net, &yfs_RXYFSSetLock,
1646 sizeof(__be32) * 2 +
1647 sizeof(struct yfs_xdr_YFSFid) +
1648 sizeof(__be32),
1649 sizeof(struct yfs_xdr_YFSFetchStatus) +
1650 sizeof(struct yfs_xdr_YFSVolSync));
1651 if (!call)
1652 return -ENOMEM;
1653
1654 call->key = fc->key;
1655 call->lvnode = vnode;
1656 call->out_scb = scb;
1657
1658 /* marshall the parameters */
1659 bp = call->request;
1660 bp = xdr_encode_u32(bp, YFSSETLOCK);
1661 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1662 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1663 bp = xdr_encode_u32(bp, type);
1664 yfs_check_req(call, bp);
1665
1666 afs_use_fs_server(call, fc->cbi);
1667 trace_afs_make_fs_calli(call, &vnode->fid, type);
1668 afs_set_fc_call(call, fc);
1669 afs_make_call(&fc->ac, call, GFP_NOFS);
1670 return afs_wait_for_call_to_complete(call, &fc->ac);
1671 }
1672
1673 /*
1674 * extend a lock on a file
1675 */
1676 int yfs_fs_extend_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb)
1677 {
1678 struct afs_vnode *vnode = fc->vnode;
1679 struct afs_call *call;
1680 struct afs_net *net = afs_v2net(vnode);
1681 __be32 *bp;
1682
1683 _enter("");
1684
1685 call = afs_alloc_flat_call(net, &yfs_RXYFSExtendLock,
1686 sizeof(__be32) * 2 +
1687 sizeof(struct yfs_xdr_YFSFid),
1688 sizeof(struct yfs_xdr_YFSFetchStatus) +
1689 sizeof(struct yfs_xdr_YFSVolSync));
1690 if (!call)
1691 return -ENOMEM;
1692
1693 call->key = fc->key;
1694 call->lvnode = vnode;
1695 call->out_scb = scb;
1696
1697 /* marshall the parameters */
1698 bp = call->request;
1699 bp = xdr_encode_u32(bp, YFSEXTENDLOCK);
1700 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1701 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1702 yfs_check_req(call, bp);
1703
1704 afs_use_fs_server(call, fc->cbi);
1705 trace_afs_make_fs_call(call, &vnode->fid);
1706 afs_set_fc_call(call, fc);
1707 afs_make_call(&fc->ac, call, GFP_NOFS);
1708 return afs_wait_for_call_to_complete(call, &fc->ac);
1709 }
1710
1711 /*
1712 * release a lock on a file
1713 */
1714 int yfs_fs_release_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb)
1715 {
1716 struct afs_vnode *vnode = fc->vnode;
1717 struct afs_call *call;
1718 struct afs_net *net = afs_v2net(vnode);
1719 __be32 *bp;
1720
1721 _enter("");
1722
1723 call = afs_alloc_flat_call(net, &yfs_RXYFSReleaseLock,
1724 sizeof(__be32) * 2 +
1725 sizeof(struct yfs_xdr_YFSFid),
1726 sizeof(struct yfs_xdr_YFSFetchStatus) +
1727 sizeof(struct yfs_xdr_YFSVolSync));
1728 if (!call)
1729 return -ENOMEM;
1730
1731 call->key = fc->key;
1732 call->lvnode = vnode;
1733 call->out_scb = scb;
1734
1735 /* marshall the parameters */
1736 bp = call->request;
1737 bp = xdr_encode_u32(bp, YFSRELEASELOCK);
1738 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1739 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1740 yfs_check_req(call, bp);
1741
1742 afs_use_fs_server(call, fc->cbi);
1743 trace_afs_make_fs_call(call, &vnode->fid);
1744 afs_set_fc_call(call, fc);
1745 afs_make_call(&fc->ac, call, GFP_NOFS);
1746 return afs_wait_for_call_to_complete(call, &fc->ac);
1747 }
1748
1749 /*
1750 * YFS.FetchStatus operation type
1751 */
1752 static const struct afs_call_type yfs_RXYFSFetchStatus = {
1753 .name = "YFS.FetchStatus",
1754 .op = yfs_FS_FetchStatus,
1755 .deliver = yfs_deliver_fs_status_cb_and_volsync,
1756 .destructor = afs_flat_call_destructor,
1757 };
1758
1759 /*
1760 * Fetch the status information for a fid without needing a vnode handle.
1761 */
1762 int yfs_fs_fetch_status(struct afs_fs_cursor *fc,
1763 struct afs_net *net,
1764 struct afs_fid *fid,
1765 struct afs_status_cb *scb,
1766 struct afs_volsync *volsync)
1767 {
1768 struct afs_call *call;
1769 __be32 *bp;
1770
1771 _enter(",%x,{%llx:%llu},,",
1772 key_serial(fc->key), fid->vid, fid->vnode);
1773
1774 call = afs_alloc_flat_call(net, &yfs_RXYFSFetchStatus,
1775 sizeof(__be32) * 2 +
1776 sizeof(struct yfs_xdr_YFSFid),
1777 sizeof(struct yfs_xdr_YFSFetchStatus) +
1778 sizeof(struct yfs_xdr_YFSCallBack) +
1779 sizeof(struct yfs_xdr_YFSVolSync));
1780 if (!call) {
1781 fc->ac.error = -ENOMEM;
1782 return -ENOMEM;
1783 }
1784
1785 call->key = fc->key;
1786 call->out_scb = scb;
1787 call->out_volsync = volsync;
1788
1789 /* marshall the parameters */
1790 bp = call->request;
1791 bp = xdr_encode_u32(bp, YFSFETCHSTATUS);
1792 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1793 bp = xdr_encode_YFSFid(bp, fid);
1794 yfs_check_req(call, bp);
1795
1796 afs_use_fs_server(call, fc->cbi);
1797 trace_afs_make_fs_call(call, fid);
1798 afs_set_fc_call(call, fc);
1799 afs_make_call(&fc->ac, call, GFP_NOFS);
1800 return afs_wait_for_call_to_complete(call, &fc->ac);
1801 }
1802
1803 /*
1804 * Deliver reply data to an YFS.InlineBulkStatus call
1805 */
1806 static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
1807 {
1808 struct afs_status_cb *scb;
1809 const __be32 *bp;
1810 u32 tmp;
1811 int ret;
1812
1813 _enter("{%u}", call->unmarshall);
1814
1815 switch (call->unmarshall) {
1816 case 0:
1817 afs_extract_to_tmp(call);
1818 call->unmarshall++;
1819 /* Fall through */
1820
1821 /* Extract the file status count and array in two steps */
1822 case 1:
1823 _debug("extract status count");
1824 ret = afs_extract_data(call, true);
1825 if (ret < 0)
1826 return ret;
1827
1828 tmp = ntohl(call->tmp);
1829 _debug("status count: %u/%u", tmp, call->count2);
1830 if (tmp != call->count2)
1831 return afs_protocol_error(call, -EBADMSG,
1832 afs_eproto_ibulkst_count);
1833
1834 call->count = 0;
1835 call->unmarshall++;
1836 more_counts:
1837 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchStatus));
1838 /* Fall through */
1839
1840 case 2:
1841 _debug("extract status array %u", call->count);
1842 ret = afs_extract_data(call, true);
1843 if (ret < 0)
1844 return ret;
1845
1846 bp = call->buffer;
1847 scb = &call->out_scb[call->count];
1848 ret = xdr_decode_YFSFetchStatus(&bp, call, scb);
1849 if (ret < 0)
1850 return ret;
1851
1852 call->count++;
1853 if (call->count < call->count2)
1854 goto more_counts;
1855
1856 call->count = 0;
1857 call->unmarshall++;
1858 afs_extract_to_tmp(call);
1859 /* Fall through */
1860
1861 /* Extract the callback count and array in two steps */
1862 case 3:
1863 _debug("extract CB count");
1864 ret = afs_extract_data(call, true);
1865 if (ret < 0)
1866 return ret;
1867
1868 tmp = ntohl(call->tmp);
1869 _debug("CB count: %u", tmp);
1870 if (tmp != call->count2)
1871 return afs_protocol_error(call, -EBADMSG,
1872 afs_eproto_ibulkst_cb_count);
1873 call->count = 0;
1874 call->unmarshall++;
1875 more_cbs:
1876 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSCallBack));
1877 /* Fall through */
1878
1879 case 4:
1880 _debug("extract CB array");
1881 ret = afs_extract_data(call, true);
1882 if (ret < 0)
1883 return ret;
1884
1885 _debug("unmarshall CB array");
1886 bp = call->buffer;
1887 scb = &call->out_scb[call->count];
1888 xdr_decode_YFSCallBack(&bp, call, scb);
1889 call->count++;
1890 if (call->count < call->count2)
1891 goto more_cbs;
1892
1893 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSVolSync));
1894 call->unmarshall++;
1895 /* Fall through */
1896
1897 case 5:
1898 ret = afs_extract_data(call, false);
1899 if (ret < 0)
1900 return ret;
1901
1902 bp = call->buffer;
1903 xdr_decode_YFSVolSync(&bp, call->out_volsync);
1904
1905 call->unmarshall++;
1906 /* Fall through */
1907
1908 case 6:
1909 break;
1910 }
1911
1912 _leave(" = 0 [done]");
1913 return 0;
1914 }
1915
1916 /*
1917 * FS.InlineBulkStatus operation type
1918 */
1919 static const struct afs_call_type yfs_RXYFSInlineBulkStatus = {
1920 .name = "YFS.InlineBulkStatus",
1921 .op = yfs_FS_InlineBulkStatus,
1922 .deliver = yfs_deliver_fs_inline_bulk_status,
1923 .destructor = afs_flat_call_destructor,
1924 };
1925
1926 /*
1927 * Fetch the status information for up to 1024 files
1928 */
1929 int yfs_fs_inline_bulk_status(struct afs_fs_cursor *fc,
1930 struct afs_net *net,
1931 struct afs_fid *fids,
1932 struct afs_status_cb *statuses,
1933 unsigned int nr_fids,
1934 struct afs_volsync *volsync)
1935 {
1936 struct afs_call *call;
1937 __be32 *bp;
1938 int i;
1939
1940 _enter(",%x,{%llx:%llu},%u",
1941 key_serial(fc->key), fids[0].vid, fids[1].vnode, nr_fids);
1942
1943 call = afs_alloc_flat_call(net, &yfs_RXYFSInlineBulkStatus,
1944 sizeof(__be32) +
1945 sizeof(__be32) +
1946 sizeof(__be32) +
1947 sizeof(struct yfs_xdr_YFSFid) * nr_fids,
1948 sizeof(struct yfs_xdr_YFSFetchStatus));
1949 if (!call) {
1950 fc->ac.error = -ENOMEM;
1951 return -ENOMEM;
1952 }
1953
1954 call->key = fc->key;
1955 call->out_scb = statuses;
1956 call->out_volsync = volsync;
1957 call->count2 = nr_fids;
1958
1959 /* marshall the parameters */
1960 bp = call->request;
1961 bp = xdr_encode_u32(bp, YFSINLINEBULKSTATUS);
1962 bp = xdr_encode_u32(bp, 0); /* RPCFlags */
1963 bp = xdr_encode_u32(bp, nr_fids);
1964 for (i = 0; i < nr_fids; i++)
1965 bp = xdr_encode_YFSFid(bp, &fids[i]);
1966 yfs_check_req(call, bp);
1967
1968 afs_use_fs_server(call, fc->cbi);
1969 trace_afs_make_fs_call(call, &fids[0]);
1970 afs_set_fc_call(call, fc);
1971 afs_make_call(&fc->ac, call, GFP_NOFS);
1972 return afs_wait_for_call_to_complete(call, &fc->ac);
1973 }
1974
1975 /*
1976 * Deliver reply data to an YFS.FetchOpaqueACL.
1977 */
1978 static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
1979 {
1980 struct yfs_acl *yacl = call->out_yacl;
1981 struct afs_acl *acl;
1982 const __be32 *bp;
1983 unsigned int size;
1984 int ret;
1985
1986 _enter("{%u}", call->unmarshall);
1987
1988 switch (call->unmarshall) {
1989 case 0:
1990 afs_extract_to_tmp(call);
1991 call->unmarshall++;
1992 /* Fall through */
1993
1994 /* Extract the file ACL length */
1995 case 1:
1996 ret = afs_extract_data(call, true);
1997 if (ret < 0)
1998 return ret;
1999
2000 size = call->count2 = ntohl(call->tmp);
2001 size = round_up(size, 4);
2002
2003 if (yacl->flags & YFS_ACL_WANT_ACL) {
2004 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
2005 if (!acl)
2006 return -ENOMEM;
2007 yacl->acl = acl;
2008 acl->size = call->count2;
2009 afs_extract_begin(call, acl->data, size);
2010 } else {
2011 afs_extract_discard(call, size);
2012 }
2013 call->unmarshall++;
2014 /* Fall through */
2015
2016 /* Extract the file ACL */
2017 case 2:
2018 ret = afs_extract_data(call, true);
2019 if (ret < 0)
2020 return ret;
2021
2022 afs_extract_to_tmp(call);
2023 call->unmarshall++;
2024 /* Fall through */
2025
2026 /* Extract the volume ACL length */
2027 case 3:
2028 ret = afs_extract_data(call, true);
2029 if (ret < 0)
2030 return ret;
2031
2032 size = call->count2 = ntohl(call->tmp);
2033 size = round_up(size, 4);
2034
2035 if (yacl->flags & YFS_ACL_WANT_VOL_ACL) {
2036 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
2037 if (!acl)
2038 return -ENOMEM;
2039 yacl->vol_acl = acl;
2040 acl->size = call->count2;
2041 afs_extract_begin(call, acl->data, size);
2042 } else {
2043 afs_extract_discard(call, size);
2044 }
2045 call->unmarshall++;
2046 /* Fall through */
2047
2048 /* Extract the volume ACL */
2049 case 4:
2050 ret = afs_extract_data(call, true);
2051 if (ret < 0)
2052 return ret;
2053
2054 afs_extract_to_buf(call,
2055 sizeof(__be32) * 2 +
2056 sizeof(struct yfs_xdr_YFSFetchStatus) +
2057 sizeof(struct yfs_xdr_YFSVolSync));
2058 call->unmarshall++;
2059 /* Fall through */
2060
2061 /* extract the metadata */
2062 case 5:
2063 ret = afs_extract_data(call, false);
2064 if (ret < 0)
2065 return ret;
2066
2067 bp = call->buffer;
2068 yacl->inherit_flag = ntohl(*bp++);
2069 yacl->num_cleaned = ntohl(*bp++);
2070 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
2071 if (ret < 0)
2072 return ret;
2073 xdr_decode_YFSVolSync(&bp, call->out_volsync);
2074
2075 call->unmarshall++;
2076 /* Fall through */
2077
2078 case 6:
2079 break;
2080 }
2081
2082 _leave(" = 0 [done]");
2083 return 0;
2084 }
2085
2086 void yfs_free_opaque_acl(struct yfs_acl *yacl)
2087 {
2088 if (yacl) {
2089 kfree(yacl->acl);
2090 kfree(yacl->vol_acl);
2091 kfree(yacl);
2092 }
2093 }
2094
2095 /*
2096 * YFS.FetchOpaqueACL operation type
2097 */
2098 static const struct afs_call_type yfs_RXYFSFetchOpaqueACL = {
2099 .name = "YFS.FetchOpaqueACL",
2100 .op = yfs_FS_FetchOpaqueACL,
2101 .deliver = yfs_deliver_fs_fetch_opaque_acl,
2102 .destructor = afs_flat_call_destructor,
2103 };
2104
2105 /*
2106 * Fetch the YFS advanced ACLs for a file.
2107 */
2108 struct yfs_acl *yfs_fs_fetch_opaque_acl(struct afs_fs_cursor *fc,
2109 struct yfs_acl *yacl,
2110 struct afs_status_cb *scb)
2111 {
2112 struct afs_vnode *vnode = fc->vnode;
2113 struct afs_call *call;
2114 struct afs_net *net = afs_v2net(vnode);
2115 __be32 *bp;
2116
2117 _enter(",%x,{%llx:%llu},,",
2118 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
2119
2120 call = afs_alloc_flat_call(net, &yfs_RXYFSFetchOpaqueACL,
2121 sizeof(__be32) * 2 +
2122 sizeof(struct yfs_xdr_YFSFid),
2123 sizeof(__be32) * 2 +
2124 sizeof(struct yfs_xdr_YFSFetchStatus) +
2125 sizeof(struct yfs_xdr_YFSVolSync));
2126 if (!call) {
2127 fc->ac.error = -ENOMEM;
2128 return ERR_PTR(-ENOMEM);
2129 }
2130
2131 call->key = fc->key;
2132 call->out_yacl = yacl;
2133 call->out_scb = scb;
2134 call->out_volsync = NULL;
2135
2136 /* marshall the parameters */
2137 bp = call->request;
2138 bp = xdr_encode_u32(bp, YFSFETCHOPAQUEACL);
2139 bp = xdr_encode_u32(bp, 0); /* RPC flags */
2140 bp = xdr_encode_YFSFid(bp, &vnode->fid);
2141 yfs_check_req(call, bp);
2142
2143 afs_use_fs_server(call, fc->cbi);
2144 trace_afs_make_fs_call(call, &vnode->fid);
2145 afs_make_call(&fc->ac, call, GFP_KERNEL);
2146 return (struct yfs_acl *)afs_wait_for_call_to_complete(call, &fc->ac);
2147 }
2148
2149 /*
2150 * YFS.StoreOpaqueACL2 operation type
2151 */
2152 static const struct afs_call_type yfs_RXYFSStoreOpaqueACL2 = {
2153 .name = "YFS.StoreOpaqueACL2",
2154 .op = yfs_FS_StoreOpaqueACL2,
2155 .deliver = yfs_deliver_status_and_volsync,
2156 .destructor = afs_flat_call_destructor,
2157 };
2158
2159 /*
2160 * Fetch the YFS ACL for a file.
2161 */
2162 int yfs_fs_store_opaque_acl2(struct afs_fs_cursor *fc, const struct afs_acl *acl,
2163 struct afs_status_cb *scb)
2164 {
2165 struct afs_vnode *vnode = fc->vnode;
2166 struct afs_call *call;
2167 struct afs_net *net = afs_v2net(vnode);
2168 size_t size;
2169 __be32 *bp;
2170
2171 _enter(",%x,{%llx:%llu},,",
2172 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
2173
2174 size = round_up(acl->size, 4);
2175 call = afs_alloc_flat_call(net, &yfs_RXYFSStoreOpaqueACL2,
2176 sizeof(__be32) * 2 +
2177 sizeof(struct yfs_xdr_YFSFid) +
2178 sizeof(__be32) + size,
2179 sizeof(struct yfs_xdr_YFSFetchStatus) +
2180 sizeof(struct yfs_xdr_YFSVolSync));
2181 if (!call) {
2182 fc->ac.error = -ENOMEM;
2183 return -ENOMEM;
2184 }
2185
2186 call->key = fc->key;
2187 call->out_scb = scb;
2188 call->out_volsync = NULL;
2189
2190 /* marshall the parameters */
2191 bp = call->request;
2192 bp = xdr_encode_u32(bp, YFSSTOREOPAQUEACL2);
2193 bp = xdr_encode_u32(bp, 0); /* RPC flags */
2194 bp = xdr_encode_YFSFid(bp, &vnode->fid);
2195 bp = xdr_encode_u32(bp, acl->size);
2196 memcpy(bp, acl->data, acl->size);
2197 if (acl->size != size)
2198 memset((void *)bp + acl->size, 0, size - acl->size);
2199 yfs_check_req(call, bp);
2200
2201 trace_afs_make_fs_call(call, &vnode->fid);
2202 afs_make_call(&fc->ac, call, GFP_KERNEL);
2203 return afs_wait_for_call_to_complete(call, &fc->ac);
2204 }
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